Vendor import of openzfs master @ 184df27eef0abdc7ab2105b21257f753834b936bvendor/openzfs/2.0-rc0-g184df27

Sponsored by:	iX Systems, Inc.

52 files changed, 14138 insertions, 0 deletions

diff --git a/cmd/zpool/.gitignore b/cmd/zpool/.gitignore
new file mode 100644
index 000000000000..8ea518af78e5
--- /dev/null
+++ b/cmd/zpool/.gitignore
@@ -0,0 +1 @@
+/zpool
diff --git a/cmd/zpool/Makefile.am b/cmd/zpool/Makefile.am
new file mode 100644
index 000000000000..c0378b136901
--- /dev/null
+++ b/cmd/zpool/Makefile.am
@@ -0,0 +1,136 @@
+include $(top_srcdir)/config/Rules.am
+
+AM_CFLAGS += $(LIBBLKID_CFLAGS) $(LIBUUID_CFLAGS)
+
+DEFAULT_INCLUDES += -I$(srcdir)
+
+sbin_PROGRAMS = zpool
+
+zpool_SOURCES = \
+	zpool_iter.c \
+	zpool_main.c \
+	zpool_util.c \
+	zpool_util.h \
+	zpool_vdev.c
+
+if BUILD_FREEBSD
+zpool_SOURCES += os/freebsd/zpool_vdev_os.c
+endif
+
+if BUILD_LINUX
+zpool_SOURCES += os/linux/zpool_vdev_os.c
+endif
+
+zpool_LDADD = \
+	$(abs_top_builddir)/lib/libzfs/libzfs.la \
+	$(abs_top_builddir)/lib/libzfs_core/libzfs_core.la \
+	$(abs_top_builddir)/lib/libnvpair/libnvpair.la \
+	$(abs_top_builddir)/lib/libuutil/libuutil.la
+
+zpool_LDADD += $(LTLIBINTL)
+
+if BUILD_FREEBSD
+zpool_LDADD += -lgeom
+endif
+zpool_LDADD += -lm $(LIBBLKID_LIBS) $(LIBUUID_LIBS)
+
+zpoolconfdir = $(sysconfdir)/zfs/zpool.d
+zpoolexecdir = $(zfsexecdir)/zpool.d
+
+EXTRA_DIST = zpool.d/README
+
+dist_zpoolexec_SCRIPTS = \
+	zpool.d/dm-deps \
+	zpool.d/enc \
+	zpool.d/encdev \
+	zpool.d/fault_led \
+	zpool.d/iostat \
+	zpool.d/iostat-1s \
+	zpool.d/iostat-10s \
+	zpool.d/label \
+	zpool.d/locate_led \
+	zpool.d/lsblk \
+	zpool.d/media \
+	zpool.d/model \
+	zpool.d/serial \
+	zpool.d/ses \
+	zpool.d/size \
+	zpool.d/slot \
+	zpool.d/smart \
+	zpool.d/smartx \
+	zpool.d/temp \
+	zpool.d/health \
+	zpool.d/r_proc \
+	zpool.d/w_proc \
+	zpool.d/r_ucor \
+	zpool.d/w_ucor \
+	zpool.d/nonmed \
+	zpool.d/defect \
+	zpool.d/hours_on \
+	zpool.d/realloc \
+	zpool.d/rep_ucor \
+	zpool.d/cmd_to \
+	zpool.d/pend_sec \
+	zpool.d/off_ucor \
+	zpool.d/ata_err \
+	zpool.d/nvme_err \
+	zpool.d/pwr_cyc \
+	zpool.d/upath \
+	zpool.d/vendor \
+	zpool.d/smart_test \
+	zpool.d/test_type \
+	zpool.d/test_status \
+	zpool.d/test_progress \
+	zpool.d/test_ended
+
+zpoolconfdefaults = \
+	dm-deps \
+	enc \
+	encdev \
+	fault_led \
+	iostat \
+	iostat-1s \
+	iostat-10s \
+	label \
+	locate_led \
+	lsblk \
+	media \
+	model \
+	serial \
+	ses \
+	size \
+	slot \
+	smart \
+	smartx \
+	temp \
+	health \
+	r_proc \
+	w_proc \
+	r_ucor \
+	w_ucor \
+	nonmed \
+	defect \
+	hours_on \
+	realloc \
+	rep_ucor \
+	cmd_to \
+	pend_sec \
+	off_ucor \
+	ata_err \
+	nvme_err \
+	pwr_cyc \
+	upath \
+	vendor \
+	smart_test \
+	test_type \
+	test_status \
+	test_progress \
+	test_ended
+
+install-data-hook:
+	$(MKDIR_P) "$(DESTDIR)$(zpoolconfdir)"
+	for f in $(zpoolconfdefaults); do \
+	  test -f "$(DESTDIR)$(zpoolconfdir)/$${f}" -o \
+	       -L "$(DESTDIR)$(zpoolconfdir)/$${f}" || \
+	    ln -s "$(zpoolexecdir)/$${f}" "$(DESTDIR)$(zpoolconfdir)"; \
+	done
diff --git a/cmd/zpool/os/freebsd/zpool_vdev_os.c b/cmd/zpool/os/freebsd/zpool_vdev_os.c
new file mode 100644
index 000000000000..7d48f61a0ee7
--- /dev/null
+++ b/cmd/zpool/os/freebsd/zpool_vdev_os.c
@@ -0,0 +1,103 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2018 by Delphix. All rights reserved.
+ * Copyright (c) 2016, 2017 Intel Corporation.
+ * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>.
+ */
+
+/*
+ * Functions to convert between a list of vdevs and an nvlist representing the
+ * configuration.  Each entry in the list can be one of:
+ *
+ * 	Device vdevs
+ * 		disk=(path=..., devid=...)
+ * 		file=(path=...)
+ *
+ * 	Group vdevs
+ * 		raidz[1|2]=(...)
+ * 		mirror=(...)
+ *
+ * 	Hot spares
+ *
+ * While the underlying implementation supports it, group vdevs cannot contain
+ * other group vdevs.  All userland verification of devices is contained within
+ * this file.  If successful, the nvlist returned can be passed directly to the
+ * kernel; we've done as much verification as possible in userland.
+ *
+ * Hot spares are a special case, and passed down as an array of disk vdevs, at
+ * the same level as the root of the vdev tree.
+ *
+ * The only function exported by this file is 'make_root_vdev'.  The
+ * function performs several passes:
+ *
+ * 	1. Construct the vdev specification.  Performs syntax validation and
+ *         makes sure each device is valid.
+ * 	2. Check for devices in use.  Using libdiskmgt, makes sure that no
+ *         devices are also in use.  Some can be overridden using the 'force'
+ *         flag, others cannot.
+ * 	3. Check for replication errors if the 'force' flag is not specified.
+ *         validates that the replication level is consistent across the
+ *         entire pool.
+ * 	4. Call libzfs to label any whole disks with an EFI label.
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <libintl.h>
+#include <libnvpair.h>
+#include <libzutil.h>
+#include <limits.h>
+#include <sys/spa.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <paths.h>
+#include <sys/stat.h>
+#include <sys/disk.h>
+#include <sys/mntent.h>
+#include <libgeom.h>
+
+#include "zpool_util.h"
+#include <sys/zfs_context.h>
+
+int
+check_device(const char *name, boolean_t force, boolean_t isspare,
+    boolean_t iswholedisk)
+{
+	char path[MAXPATHLEN];
+
+	if (strncmp(name, _PATH_DEV, sizeof (_PATH_DEV) - 1) != 0)
+		snprintf(path, sizeof (path), "%s%s", _PATH_DEV, name);
+	else
+		strlcpy(path, name, sizeof (path));
+
+	return (check_file(path, force, isspare));
+}
+
+boolean_t
+check_sector_size_database(char *path, int *sector_size)
+{
+	return (0);
+}
diff --git a/cmd/zpool/os/linux/zpool_vdev_os.c b/cmd/zpool/os/linux/zpool_vdev_os.c
new file mode 100644
index 000000000000..d087c4c14dac
--- /dev/null
+++ b/cmd/zpool/os/linux/zpool_vdev_os.c
@@ -0,0 +1,410 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2018 by Delphix. All rights reserved.
+ * Copyright (c) 2016, 2017 Intel Corporation.
+ * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>.
+ */
+
+/*
+ * Functions to convert between a list of vdevs and an nvlist representing the
+ * configuration.  Each entry in the list can be one of:
+ *
+ * 	Device vdevs
+ * 		disk=(path=..., devid=...)
+ * 		file=(path=...)
+ *
+ * 	Group vdevs
+ * 		raidz[1|2]=(...)
+ * 		mirror=(...)
+ *
+ * 	Hot spares
+ *
+ * While the underlying implementation supports it, group vdevs cannot contain
+ * other group vdevs.  All userland verification of devices is contained within
+ * this file.  If successful, the nvlist returned can be passed directly to the
+ * kernel; we've done as much verification as possible in userland.
+ *
+ * Hot spares are a special case, and passed down as an array of disk vdevs, at
+ * the same level as the root of the vdev tree.
+ *
+ * The only function exported by this file is 'make_root_vdev'.  The
+ * function performs several passes:
+ *
+ * 	1. Construct the vdev specification.  Performs syntax validation and
+ *         makes sure each device is valid.
+ * 	2. Check for devices in use.  Using libblkid to make sure that no
+ *         devices are also in use.  Some can be overridden using the 'force'
+ *         flag, others cannot.
+ * 	3. Check for replication errors if the 'force' flag is not specified.
+ *         validates that the replication level is consistent across the
+ *         entire pool.
+ * 	4. Call libzfs to label any whole disks with an EFI label.
+ */
+
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <libintl.h>
+#include <libnvpair.h>
+#include <libzutil.h>
+#include <limits.h>
+#include <sys/spa.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include "zpool_util.h"
+#include <sys/zfs_context.h>
+
+#include <scsi/scsi.h>
+#include <scsi/sg.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/efi_partition.h>
+#include <sys/stat.h>
+#include <sys/vtoc.h>
+#include <sys/mntent.h>
+#include <uuid/uuid.h>
+#include <blkid/blkid.h>
+
+typedef struct vdev_disk_db_entry
+{
+	char id[24];
+	int sector_size;
+} vdev_disk_db_entry_t;
+
+/*
+ * Database of block devices that lie about physical sector sizes.  The
+ * identification string must be precisely 24 characters to avoid false
+ * negatives
+ */
+static vdev_disk_db_entry_t vdev_disk_database[] = {
+	{"ATA     ADATA SSD S396 3", 8192},
+	{"ATA     APPLE SSD SM128E", 8192},
+	{"ATA     APPLE SSD SM256E", 8192},
+	{"ATA     APPLE SSD SM512E", 8192},
+	{"ATA     APPLE SSD SM768E", 8192},
+	{"ATA     C400-MTFDDAC064M", 8192},
+	{"ATA     C400-MTFDDAC128M", 8192},
+	{"ATA     C400-MTFDDAC256M", 8192},
+	{"ATA     C400-MTFDDAC512M", 8192},
+	{"ATA     Corsair Force 3 ", 8192},
+	{"ATA     Corsair Force GS", 8192},
+	{"ATA     INTEL SSDSA2CT04", 8192},
+	{"ATA     INTEL SSDSA2BZ10", 8192},
+	{"ATA     INTEL SSDSA2BZ20", 8192},
+	{"ATA     INTEL SSDSA2BZ30", 8192},
+	{"ATA     INTEL SSDSA2CW04", 8192},
+	{"ATA     INTEL SSDSA2CW08", 8192},
+	{"ATA     INTEL SSDSA2CW12", 8192},
+	{"ATA     INTEL SSDSA2CW16", 8192},
+	{"ATA     INTEL SSDSA2CW30", 8192},
+	{"ATA     INTEL SSDSA2CW60", 8192},
+	{"ATA     INTEL SSDSC2CT06", 8192},
+	{"ATA     INTEL SSDSC2CT12", 8192},
+	{"ATA     INTEL SSDSC2CT18", 8192},
+	{"ATA     INTEL SSDSC2CT24", 8192},
+	{"ATA     INTEL SSDSC2CW06", 8192},
+	{"ATA     INTEL SSDSC2CW12", 8192},
+	{"ATA     INTEL SSDSC2CW18", 8192},
+	{"ATA     INTEL SSDSC2CW24", 8192},
+	{"ATA     INTEL SSDSC2CW48", 8192},
+	{"ATA     KINGSTON SH100S3", 8192},
+	{"ATA     KINGSTON SH103S3", 8192},
+	{"ATA     M4-CT064M4SSD2  ", 8192},
+	{"ATA     M4-CT128M4SSD2  ", 8192},
+	{"ATA     M4-CT256M4SSD2  ", 8192},
+	{"ATA     M4-CT512M4SSD2  ", 8192},
+	{"ATA     OCZ-AGILITY2    ", 8192},
+	{"ATA     OCZ-AGILITY3    ", 8192},
+	{"ATA     OCZ-VERTEX2 3.5 ", 8192},
+	{"ATA     OCZ-VERTEX3     ", 8192},
+	{"ATA     OCZ-VERTEX3 LT  ", 8192},
+	{"ATA     OCZ-VERTEX3 MI  ", 8192},
+	{"ATA     OCZ-VERTEX4     ", 8192},
+	{"ATA     SAMSUNG MZ7WD120", 8192},
+	{"ATA     SAMSUNG MZ7WD240", 8192},
+	{"ATA     SAMSUNG MZ7WD480", 8192},
+	{"ATA     SAMSUNG MZ7WD960", 8192},
+	{"ATA     SAMSUNG SSD 830 ", 8192},
+	{"ATA     Samsung SSD 840 ", 8192},
+	{"ATA     SanDisk SSD U100", 8192},
+	{"ATA     TOSHIBA THNSNH06", 8192},
+	{"ATA     TOSHIBA THNSNH12", 8192},
+	{"ATA     TOSHIBA THNSNH25", 8192},
+	{"ATA     TOSHIBA THNSNH51", 8192},
+	{"ATA     APPLE SSD TS064C", 4096},
+	{"ATA     APPLE SSD TS128C", 4096},
+	{"ATA     APPLE SSD TS256C", 4096},
+	{"ATA     APPLE SSD TS512C", 4096},
+	{"ATA     INTEL SSDSA2M040", 4096},
+	{"ATA     INTEL SSDSA2M080", 4096},
+	{"ATA     INTEL SSDSA2M160", 4096},
+	{"ATA     INTEL SSDSC2MH12", 4096},
+	{"ATA     INTEL SSDSC2MH25", 4096},
+	{"ATA     OCZ CORE_SSD    ", 4096},
+	{"ATA     OCZ-VERTEX      ", 4096},
+	{"ATA     SAMSUNG MCCOE32G", 4096},
+	{"ATA     SAMSUNG MCCOE64G", 4096},
+	{"ATA     SAMSUNG SSD PM80", 4096},
+	/* Flash drives optimized for 4KB IOs on larger pages */
+	{"ATA     INTEL SSDSC2BA10", 4096},
+	{"ATA     INTEL SSDSC2BA20", 4096},
+	{"ATA     INTEL SSDSC2BA40", 4096},
+	{"ATA     INTEL SSDSC2BA80", 4096},
+	{"ATA     INTEL SSDSC2BB08", 4096},
+	{"ATA     INTEL SSDSC2BB12", 4096},
+	{"ATA     INTEL SSDSC2BB16", 4096},
+	{"ATA     INTEL SSDSC2BB24", 4096},
+	{"ATA     INTEL SSDSC2BB30", 4096},
+	{"ATA     INTEL SSDSC2BB40", 4096},
+	{"ATA     INTEL SSDSC2BB48", 4096},
+	{"ATA     INTEL SSDSC2BB60", 4096},
+	{"ATA     INTEL SSDSC2BB80", 4096},
+	{"ATA     INTEL SSDSC2BW24", 4096},
+	{"ATA     INTEL SSDSC2BW48", 4096},
+	{"ATA     INTEL SSDSC2BP24", 4096},
+	{"ATA     INTEL SSDSC2BP48", 4096},
+	{"NA      SmrtStorSDLKAE9W", 4096},
+	{"NVMe    Amazon EC2 NVMe ", 4096},
+	/* Imported from Open Solaris */
+	{"ATA     MARVELL SD88SA02", 4096},
+	/* Advanced format Hard drives */
+	{"ATA     Hitachi HDS5C303", 4096},
+	{"ATA     SAMSUNG HD204UI ", 4096},
+	{"ATA     ST2000DL004 HD20", 4096},
+	{"ATA     WDC WD10EARS-00M", 4096},
+	{"ATA     WDC WD10EARS-00S", 4096},
+	{"ATA     WDC WD10EARS-00Z", 4096},
+	{"ATA     WDC WD15EARS-00M", 4096},
+	{"ATA     WDC WD15EARS-00S", 4096},
+	{"ATA     WDC WD15EARS-00Z", 4096},
+	{"ATA     WDC WD20EARS-00M", 4096},
+	{"ATA     WDC WD20EARS-00S", 4096},
+	{"ATA     WDC WD20EARS-00Z", 4096},
+	{"ATA     WDC WD1600BEVT-0", 4096},
+	{"ATA     WDC WD2500BEVT-0", 4096},
+	{"ATA     WDC WD3200BEVT-0", 4096},
+	{"ATA     WDC WD5000BEVT-0", 4096},
+};
+
+
+#define	INQ_REPLY_LEN	96
+#define	INQ_CMD_LEN	6
+
+static const int vdev_disk_database_size =
+	sizeof (vdev_disk_database) / sizeof (vdev_disk_database[0]);
+
+boolean_t
+check_sector_size_database(char *path, int *sector_size)
+{
+	unsigned char inq_buff[INQ_REPLY_LEN];
+	unsigned char sense_buffer[32];
+	unsigned char inq_cmd_blk[INQ_CMD_LEN] =
+	    {INQUIRY, 0, 0, 0, INQ_REPLY_LEN, 0};
+	sg_io_hdr_t io_hdr;
+	int error;
+	int fd;
+	int i;
+
+	/* Prepare INQUIRY command */
+	memset(&io_hdr, 0, sizeof (sg_io_hdr_t));
+	io_hdr.interface_id = 'S';
+	io_hdr.cmd_len = sizeof (inq_cmd_blk);
+	io_hdr.mx_sb_len = sizeof (sense_buffer);
+	io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
+	io_hdr.dxfer_len = INQ_REPLY_LEN;
+	io_hdr.dxferp = inq_buff;
+	io_hdr.cmdp = inq_cmd_blk;
+	io_hdr.sbp = sense_buffer;
+	io_hdr.timeout = 10;		/* 10 milliseconds is ample time */
+
+	if ((fd = open(path, O_RDONLY|O_DIRECT)) < 0)
+		return (B_FALSE);
+
+	error = ioctl(fd, SG_IO, (unsigned long) &io_hdr);
+
+	(void) close(fd);
+
+	if (error < 0)
+		return (B_FALSE);
+
+	if ((io_hdr.info & SG_INFO_OK_MASK) != SG_INFO_OK)
+		return (B_FALSE);
+
+	for (i = 0; i < vdev_disk_database_size; i++) {
+		if (memcmp(inq_buff + 8, vdev_disk_database[i].id, 24))
+			continue;
+
+		*sector_size = vdev_disk_database[i].sector_size;
+		return (B_TRUE);
+	}
+
+	return (B_FALSE);
+}
+
+static int
+check_slice(const char *path, blkid_cache cache, int force, boolean_t isspare)
+{
+	int err;
+	char *value;
+
+	/* No valid type detected device is safe to use */
+	value = blkid_get_tag_value(cache, "TYPE", path);
+	if (value == NULL)
+		return (0);
+
+	/*
+	 * If libblkid detects a ZFS device, we check the device
+	 * using check_file() to see if it's safe.  The one safe
+	 * case is a spare device shared between multiple pools.
+	 */
+	if (strcmp(value, "zfs_member") == 0) {
+		err = check_file(path, force, isspare);
+	} else {
+		if (force) {
+			err = 0;
+		} else {
+			err = -1;
+			vdev_error(gettext("%s contains a filesystem of "
+			    "type '%s'\n"), path, value);
+		}
+	}
+
+	free(value);
+
+	return (err);
+}
+
+/*
+ * Validate that a disk including all partitions are safe to use.
+ *
+ * For EFI labeled disks this can done relatively easily with the libefi
+ * library.  The partition numbers are extracted from the label and used
+ * to generate the expected /dev/ paths.  Each partition can then be
+ * checked for conflicts.
+ *
+ * For non-EFI labeled disks (MBR/EBR/etc) the same process is possible
+ * but due to the lack of a readily available libraries this scanning is
+ * not implemented.  Instead only the device path as given is checked.
+ */
+static int
+check_disk(const char *path, blkid_cache cache, int force,
+    boolean_t isspare, boolean_t iswholedisk)
+{
+	struct dk_gpt *vtoc;
+	char slice_path[MAXPATHLEN];
+	int err = 0;
+	int fd, i;
+	int flags = O_RDONLY|O_DIRECT;
+
+	if (!iswholedisk)
+		return (check_slice(path, cache, force, isspare));
+
+	/* only spares can be shared, other devices require exclusive access */
+	if (!isspare)
+		flags |= O_EXCL;
+
+	if ((fd = open(path, flags)) < 0) {
+		char *value = blkid_get_tag_value(cache, "TYPE", path);
+		(void) fprintf(stderr, gettext("%s is in use and contains "
+		    "a %s filesystem.\n"), path, value ? value : "unknown");
+		free(value);
+		return (-1);
+	}
+
+	/*
+	 * Expected to fail for non-EFI labeled disks.  Just check the device
+	 * as given and do not attempt to detect and scan partitions.
+	 */
+	err = efi_alloc_and_read(fd, &vtoc);
+	if (err) {
+		(void) close(fd);
+		return (check_slice(path, cache, force, isspare));
+	}
+
+	/*
+	 * The primary efi partition label is damaged however the secondary
+	 * label at the end of the device is intact.  Rather than use this
+	 * label we should play it safe and treat this as a non efi device.
+	 */
+	if (vtoc->efi_flags & EFI_GPT_PRIMARY_CORRUPT) {
+		efi_free(vtoc);
+		(void) close(fd);
+
+		if (force) {
+			/* Partitions will now be created using the backup */
+			return (0);
+		} else {
+			vdev_error(gettext("%s contains a corrupt primary "
+			    "EFI label.\n"), path);
+			return (-1);
+		}
+	}
+
+	for (i = 0; i < vtoc->efi_nparts; i++) {
+
+		if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED ||
+		    uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_guid))
+			continue;
+
+		if (strncmp(path, UDISK_ROOT, strlen(UDISK_ROOT)) == 0)
+			(void) snprintf(slice_path, sizeof (slice_path),
+			    "%s%s%d", path, "-part", i+1);
+		else
+			(void) snprintf(slice_path, sizeof (slice_path),
+			    "%s%s%d", path, isdigit(path[strlen(path)-1]) ?
+			    "p" : "", i+1);
+
+		err = check_slice(slice_path, cache, force, isspare);
+		if (err)
+			break;
+	}
+
+	efi_free(vtoc);
+	(void) close(fd);
+
+	return (err);
+}
+
+int
+check_device(const char *path, boolean_t force,
+    boolean_t isspare, boolean_t iswholedisk)
+{
+	blkid_cache cache;
+	int error;
+
+	error = blkid_get_cache(&cache, NULL);
+	if (error != 0) {
+		(void) fprintf(stderr, gettext("unable to access the blkid "
+		    "cache.\n"));
+		return (-1);
+	}
+
+	error = check_disk(path, cache, force, isspare, iswholedisk);
+	blkid_put_cache(cache);
+
+	return (error);
+}
diff --git a/cmd/zpool/zpool.d/README b/cmd/zpool/zpool.d/README
new file mode 100644
index 000000000000..033b7c363f5a
--- /dev/null
+++ b/cmd/zpool/zpool.d/README
@@ -0,0 +1,9 @@
+This directory contains scripts that can be run the zpool status/iostat
+-c option:
+
+	zpool status -c script1,script2, ...
+
+	zpool iostat -vc script1,script2, ...
+
+Some scripts output different values depending on the symlink name that is
+used to run them.  See the zpool(8) man page for more details.
diff --git a/cmd/zpool/zpool.d/ata_err b/cmd/zpool/zpool.d/ata_err
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/ata_err
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/cmd_to b/cmd/zpool/zpool.d/cmd_to
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/cmd_to
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/defect b/cmd/zpool/zpool.d/defect
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/defect
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/dm-deps b/cmd/zpool/zpool.d/dm-deps
new file mode 100755
index 000000000000..ee39514e4d92
--- /dev/null
+++ b/cmd/zpool/zpool.d/dm-deps
@@ -0,0 +1,29 @@
+#!/bin/sh
+#
+# Show device mapper dependent / underlying devices.  This is useful for
+# looking up the /dev/sd* devices associated with a dm or multipath device. 
+#
+
+if [ "$1" = "-h" ] ; then
+	echo "Show device mapper dependent (underlying) devices."
+	exit
+fi
+
+dev="$VDEV_PATH"
+
+# If the VDEV path is a symlink, resolve it to a real device
+if [ -L "$dev" ] ; then
+	dev=$(readlink "$dev")
+fi
+
+dev=$(basename "$dev")
+val=""
+if [ -d "/sys/class/block/$dev/slaves" ] ; then
+	# ls -C: output in columns, no newlines
+	val=$(ls -C "/sys/class/block/$dev/slaves")
+
+	# ls -C will print two spaces between files; change to one space.
+	val=$(echo "$val" | sed -r 's/[[:blank:]]+/ /g')
+fi
+
+echo "dm-deps=$val"
diff --git a/cmd/zpool/zpool.d/enc b/cmd/zpool/zpool.d/enc
new file mode 120000
index 000000000000..478d1e8967a1
--- /dev/null
+++ b/cmd/zpool/zpool.d/enc
@@ -0,0 +1 @@
+ses
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/encdev b/cmd/zpool/zpool.d/encdev
new file mode 120000
index 000000000000..478d1e8967a1
--- /dev/null
+++ b/cmd/zpool/zpool.d/encdev
@@ -0,0 +1 @@
+ses
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/fault_led b/cmd/zpool/zpool.d/fault_led
new file mode 120000
index 000000000000..478d1e8967a1
--- /dev/null
+++ b/cmd/zpool/zpool.d/fault_led
@@ -0,0 +1 @@
+ses
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/health b/cmd/zpool/zpool.d/health
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/health
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/hours_on b/cmd/zpool/zpool.d/hours_on
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/hours_on
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/iostat b/cmd/zpool/zpool.d/iostat
new file mode 100755
index 000000000000..41a3acfae7a4
--- /dev/null
+++ b/cmd/zpool/zpool.d/iostat
@@ -0,0 +1,77 @@
+#!/bin/sh
+#
+# Display most relevant iostat bandwidth/latency numbers.  The output is
+# dependent on the name of the script/symlink used to call it.
+#
+
+helpstr="
+iostat:		Show iostat values since boot (summary page).
+iostat-1s:	Do a single 1-second iostat sample and show values.
+iostat-10s:	Do a single 10-second iostat sample and show values."
+
+script=$(basename "$0")
+if [ "$1" = "-h" ] ; then
+	echo "$helpstr" | grep "$script:" | tr -s '\t' | cut -f 2-
+	exit
+fi
+
+if [ "$script" = "iostat-1s" ] ; then
+	# Do a single one-second sample
+	interval=1
+	# Don't show summary stats
+	brief="yes"
+elif [ "$script" = "iostat-10s" ] ; then
+	# Do a single ten-second sample
+	interval=10
+	# Don't show summary stats
+	brief="yes"
+fi
+
+if [ -f "$VDEV_UPATH" ] ; then
+	# We're a file-based vdev, iostat doesn't work on us.  Do nothing.
+	exit
+fi
+
+if [ "$(uname)" = "FreeBSD" ]; then
+	out=$(iostat -dKx \
+		${interval:+"-w $interval"} \
+		${interval:+"-c 1"} \
+		"$VDEV_UPATH" | tail -n 2)
+else
+	out=$(iostat -kx \
+		${brief:+"-y"} \
+		${interval:+"$interval"} \
+		${interval:+"1"} \
+		"$VDEV_UPATH" | awk NF | tail -n 2)
+fi
+
+
+# Sample output (we want the last two lines):
+#
+# Linux 2.6.32-642.13.1.el6.x86_64 (centos68) 	03/09/2017 	_x86_64_	(6 CPU)
+#
+# avg-cpu:  %user   %nice %system %iowait  %steal   %idle
+#           0.00    0.00    0.00    0.00    0.00  100.00
+#
+# Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s avgrq-sz avgqu-sz   await r_await w_await  svctm  %util
+# sdb               0.00     0.00    0.00    0.00     0.00     0.00     0.00     0.00    0.00    0.00    0.00   0.00   0.00
+#
+
+# Get the column names
+cols=$(echo "$out" | head -n 1)
+
+# Get the values and tab separate them to make them cut-able.
+vals=$(echo "$out" | tail -n 1 | sed -r 's/[[:blank:]]+/\t/g')
+
+i=0
+for col in $cols ; do
+	i=$((i+1))
+	# Skip the first column since it's just the device name
+	if [ $i -eq 1 ]; then
+		continue
+	fi
+
+	# Get i'th value
+	val=$(echo "$vals" | cut -f "$i")
+	echo "$col=$val"
+done
diff --git a/cmd/zpool/zpool.d/iostat-10s b/cmd/zpool/zpool.d/iostat-10s
new file mode 120000
index 000000000000..084278d99f0f
--- /dev/null
+++ b/cmd/zpool/zpool.d/iostat-10s
@@ -0,0 +1 @@
+iostat
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/iostat-1s b/cmd/zpool/zpool.d/iostat-1s
new file mode 120000
index 000000000000..084278d99f0f
--- /dev/null
+++ b/cmd/zpool/zpool.d/iostat-1s
@@ -0,0 +1 @@
+iostat
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/label b/cmd/zpool/zpool.d/label
new file mode 120000
index 000000000000..7d1e766add99
--- /dev/null
+++ b/cmd/zpool/zpool.d/label
@@ -0,0 +1 @@
+lsblk
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/locate_led b/cmd/zpool/zpool.d/locate_led
new file mode 120000
index 000000000000..478d1e8967a1
--- /dev/null
+++ b/cmd/zpool/zpool.d/locate_led
@@ -0,0 +1 @@
+ses
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/lsblk b/cmd/zpool/zpool.d/lsblk
new file mode 100755
index 000000000000..1cdef40494fe
--- /dev/null
+++ b/cmd/zpool/zpool.d/lsblk
@@ -0,0 +1,83 @@
+#!/bin/sh
+#
+# Print some common lsblk values
+#
+# Any (lowercased) name symlinked to the lsblk script will be passed to lsblk
+# as one of its --output names.  Here's a partial list of --output names
+# from the lsblk binary:
+#
+# Available columns (for --output):
+#        NAME  device name
+#       KNAME  internal kernel device name
+#     MAJ:MIN  major:minor device number
+#      FSTYPE  filesystem type
+#  MOUNTPOINT  where the device is mounted
+#       LABEL  filesystem LABEL
+#        UUID  filesystem UUID
+#          RA  read-ahead of the device
+#          RO  read-only device
+#          RM  removable device
+#       MODEL  device identifier
+#        SIZE  size of the device
+#       STATE  state of the device
+#       OWNER  user name
+#       GROUP  group name
+#        MODE  device node permissions
+#   ALIGNMENT  alignment offset
+#      MIN-IO  minimum I/O size
+#      OPT-IO  optimal I/O size
+#     PHY-SEC  physical sector size
+#     LOG-SEC  logical sector size
+#        ROTA  rotational device
+#       SCHED  I/O scheduler name
+#     RQ-SIZE  request queue size
+#        TYPE  device type
+#    DISC-ALN  discard alignment offset
+#   DISC-GRAN  discard granularity
+#    DISC-MAX  discard max bytes
+#   DISC-ZERO  discard zeroes data
+#
+# If the script is run as just 'lsblk' then print out disk size, vendor,
+# and model number.
+
+
+helpstr="
+label:	Show filesystem label.
+model:	Show disk model number.
+size:	Show the disk capacity.
+vendor:	Show the disk vendor.
+lsblk:	Show the disk size, vendor, and model number."
+
+script=$(basename "$0")
+
+if [ "$1" = "-h" ] ; then
+        echo "$helpstr" | grep "$script:" | tr -s '\t' | cut -f 2-
+        exit
+fi
+
+if [ "$script" = "lsblk" ] ; then
+	list="size vendor model"
+else
+	list=$(echo "$script" | tr '[:upper:]' '[:lower:]')
+fi
+
+# Older versions of lsblk don't support all these values (like SERIAL).
+for i in $list ; do
+
+	# Special case: Looking up the size of a file-based vdev can't
+	# be done with lsblk.
+	if [ "$i" = "size" ] && [ -f "$VDEV_UPATH" ] ; then
+		size=$(du -h --apparent-size "$VDEV_UPATH" | cut -f 1)
+		echo "size=$size"
+		continue
+	fi
+
+
+	val=""
+	if val=$(eval "lsblk -dl -n -o $i $VDEV_UPATH 2>/dev/null") ; then
+		# Remove leading/trailing whitespace from value
+		val=$(echo "$val" | sed -e 's/^[[:space:]]*//' \
+		     -e 's/[[:space:]]*$//')
+	fi
+	echo "$i=$val"
+done
diff --git a/cmd/zpool/zpool.d/media b/cmd/zpool/zpool.d/media
new file mode 100755
index 000000000000..05bc15918bc9
--- /dev/null
+++ b/cmd/zpool/zpool.d/media
@@ -0,0 +1,27 @@
+#!/bin/sh
+#
+# Print out the type of device
+#
+
+if [ "$1" = "-h" ] ; then
+	echo "Show whether a vdev is a file, hdd, or ssd."
+	exit
+fi
+
+if [ -b "$VDEV_UPATH" ]; then
+	device=$(basename "$VDEV_UPATH")
+	val=$(cat "/sys/block/$device/queue/rotational" 2>/dev/null)
+	if [ "$val" = "0" ]; then
+		MEDIA="ssd"
+	fi
+
+	if [ "$val" = "1" ]; then
+		MEDIA="hdd"
+	fi
+else
+	if [ -f "$VDEV_UPATH" ]; then
+		MEDIA="file"
+	fi
+fi
+
+echo "media=$MEDIA"
diff --git a/cmd/zpool/zpool.d/model b/cmd/zpool/zpool.d/model
new file mode 120000
index 000000000000..7d1e766add99
--- /dev/null
+++ b/cmd/zpool/zpool.d/model
@@ -0,0 +1 @@
+lsblk
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/nonmed b/cmd/zpool/zpool.d/nonmed
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/nonmed
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/nvme_err b/cmd/zpool/zpool.d/nvme_err
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/nvme_err
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/off_ucor b/cmd/zpool/zpool.d/off_ucor
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/off_ucor
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/pend_sec b/cmd/zpool/zpool.d/pend_sec
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/pend_sec
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/pwr_cyc b/cmd/zpool/zpool.d/pwr_cyc
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/pwr_cyc
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/r_proc b/cmd/zpool/zpool.d/r_proc
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/r_proc
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/r_ucor b/cmd/zpool/zpool.d/r_ucor
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/r_ucor
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/realloc b/cmd/zpool/zpool.d/realloc
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/realloc
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/rep_ucor b/cmd/zpool/zpool.d/rep_ucor
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/rep_ucor
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/serial b/cmd/zpool/zpool.d/serial
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/serial
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/ses b/cmd/zpool/zpool.d/ses
new file mode 100755
index 000000000000..f6b7520dfb6c
--- /dev/null
+++ b/cmd/zpool/zpool.d/ses
@@ -0,0 +1,52 @@
+#!/bin/sh
+#
+# Print SCSI Enclosure Services (SES) info. The output is dependent on the name
+# of the script/symlink used to call it.
+#
+helpstr="
+enc:		Show disk enclosure w:x:y:z value.
+slot:		Show disk slot number as reported by the enclosure.
+encdev:		Show /dev/sg* device associated with the enclosure disk slot.
+fault_led:	Show value of the disk enclosure slot fault LED.
+locate_led:	Show value of the disk enclosure slot locate LED.
+ses:		Show disk's enc, enc device, slot, and fault/locate LED values."
+
+script=$(basename "$0")
+if [ "$1" = "-h" ] ; then
+	echo "$helpstr" | grep "$script:" | tr -s '\t' | cut -f 2-
+	exit
+fi
+
+if [ "$script" = "ses" ] ; then
+	scripts='enc encdev slot fault_led locate_led'
+else
+	scripts="$script"
+fi
+
+for i in $scripts ; do
+	if [ -z "$VDEV_ENC_SYSFS_PATH" ] ; then
+		echo "$i="
+		continue
+	fi
+
+	val=""
+	case $i in
+	enc)
+		val=$(ls "$VDEV_ENC_SYSFS_PATH/../../" 2>/dev/null)
+		;;
+	slot)
+		val=$(cat "$VDEV_ENC_SYSFS_PATH/slot" 2>/dev/null)
+		;;
+	encdev)
+		val=$(ls "$VDEV_ENC_SYSFS_PATH/../device/scsi_generic" 2>/dev/null)
+		;;
+	fault_led)
+		val=$(cat "$VDEV_ENC_SYSFS_PATH/fault" 2>/dev/null)
+		;;
+	locate_led)
+		val=$(cat "$VDEV_ENC_SYSFS_PATH/locate" 2>/dev/null)
+		;;
+	esac
+	echo "$i=$val"
+done
+
diff --git a/cmd/zpool/zpool.d/size b/cmd/zpool/zpool.d/size
new file mode 120000
index 000000000000..7d1e766add99
--- /dev/null
+++ b/cmd/zpool/zpool.d/size
@@ -0,0 +1 @@
+lsblk
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/slot b/cmd/zpool/zpool.d/slot
new file mode 120000
index 000000000000..478d1e8967a1
--- /dev/null
+++ b/cmd/zpool/zpool.d/slot
@@ -0,0 +1 @@
+ses
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/smart b/cmd/zpool/zpool.d/smart
new file mode 100755
index 000000000000..f8854b75227c
--- /dev/null
+++ b/cmd/zpool/zpool.d/smart
@@ -0,0 +1,243 @@
+#!/bin/sh
+#
+# Show SMART stats
+#
+
+helpstr="
+smart:		Show SMART temperature and error stats (specific to drive type)
+smartx:		Show SMART extended drive stats (specific to drive type).
+temp:		Show SMART drive temperature in celsius (all drives).
+health:		Show reported SMART status (all drives).
+r_proc:		Show SMART read GBytes processed over drive lifetime (SAS).
+w_proc:		Show SMART write GBytes processed over drive lifetime (SAS).
+r_ucor:		Show SMART read uncorrectable errors (SAS).
+w_ucor:		Show SMART write uncorrectable errors (SAS).
+nonmed:		Show SMART non-medium errors (SAS).
+defect:		Show SMART grown defect list (SAS).
+hours_on:	Show number of hours drive powered on (all drives).
+realloc:	Show SMART reallocated sectors count (ATA).
+rep_ucor:	Show SMART reported uncorrectable count (ATA).
+cmd_to:		Show SMART command timeout count (ATA).
+pend_sec:	Show SMART current pending sector count (ATA).
+off_ucor:	Show SMART offline uncorrectable errors (ATA).
+ata_err:	Show SMART ATA errors (ATA).
+pwr_cyc:	Show SMART power cycle count (ATA).
+serial:		Show disk serial number.
+nvme_err:	Show SMART NVMe errors (NVMe).
+smart_test:	Show SMART self-test results summary.
+test_type:	Show SMART self-test type (short, long... ).
+test_status:	Show SMART self-test status.
+test_progress:	Show SMART self-test percentage done.
+test_ended:	Show when the last SMART self-test ended (if supported).
+"
+
+# Hack for developer testing
+#
+# If you set $samples to a directory containing smartctl output text files,
+# we will use them instead of running smartctl on the vdevs.  This can be
+# useful if you want to test a bunch of different smartctl outputs.  Also, if
+# $samples is set, and additional 'file' column is added to the zpool output
+# showing the filename.
+samples=
+
+# get_filename_from_dir DIR
+#
+# Look in directory DIR and return a filename from it.  The filename returned
+# is chosen quasi-sequentially (based off our PID).  This allows us to return
+# a different filename every time this script is invoked (which we do for each
+# vdev), without having to maintain state.
+get_filename_from_dir()
+{
+	dir=$1
+	pid="$$"
+	num_files=$(find "$dir" -maxdepth 1 -type f | wc -l)
+	mod=$((pid % num_files))
+	i=0
+	find "$dir" -type f -printf "%f\n" | while read -r file ; do
+		if [ "$mod" = "$i" ] ; then
+			echo "$file"
+			break
+		fi
+		i=$((i+1))
+	done
+}
+
+script=$(basename "$0")
+
+if [ "$1" = "-h" ] ; then
+        echo "$helpstr" | grep "$script:" | tr -s '\t' | cut -f 2-
+        exit
+fi
+
+smartctl_path=$(command -v smartctl)
+
+# shellcheck disable=SC2015
+if [ -b "$VDEV_UPATH" ] && [ -x "$smartctl_path" ] || [ -n "$samples" ] ; then
+	if [ -n "$samples" ] ; then
+		# cat a smartctl output text file instead of running smartctl
+		# on a vdev (only used for developer testing).
+		file=$(get_filename_from_dir "$samples")
+		echo "file=$file"
+		raw_out=$(cat "$samples/$file")
+	else
+		raw_out=$(eval "sudo $smartctl_path -a $VDEV_UPATH")
+	fi
+
+	# What kind of drive are we?  Look for the right line in smartctl:
+	#
+	# SAS:
+	#	Transport protocol:   SAS
+	#
+	# SATA:
+	#	ATA Version is:   8
+	#
+	# NVMe:
+	#       SMART/Health Information (NVMe Log 0xnn, NSID 0xnn)
+	#
+	out=$(echo "$raw_out" | awk '
+# SAS specific
+/read:/{print "rrd="$4"\nr_cor="$5"\nr_proc="$7"\nr_ucor="$8}
+/write:/{print "rwr="$4"\nw_cor="$5"\nw_proc="$7"\nw_ucor="$8}
+/Non-medium error count/{print "nonmed="$4}
+/Elements in grown defect list/{print "defect="$6}
+
+# SAS common
+/SAS/{type="sas"}
+/Drive Temperature:/{print "temp="$4}
+# Status can be a long string, substitute spaces for '_'
+/SMART Health Status:/{printf "health="; for(i=4;i<=NF-1;i++){printf "%s_", $i}; printf "%s\n", $i}
+/number of hours powered up/{print "hours_on="$7; hours_on=int($7)}
+/Serial number:/{print "serial="$3}
+
+# SATA specific
+/Reallocated_Sector_Ct/{print "realloc="$10}
+/Reported_Uncorrect/{print "rep_ucor="$10}
+/Command_Timeout/{print "cmd_to="$10}
+/Current_Pending_Sector/{print "pend_sec="$10}
+/Offline_Uncorrectable/{print "off_ucor="$10}
+/ATA Error Count:/{print "ata_err="$4}
+/Power_Cycle_Count/{print "pwr_cyc="$10}
+
+# SATA common
+/SATA/{type="sata"}
+/Temperature_Celsius/{print "temp="$10}
+/Airflow_Temperature_Cel/{print "temp="$10}
+/Current Temperature:/{print "temp="$3}
+/SMART overall-health self-assessment test result:/{print "health="$6}
+/Power_On_Hours/{print "hours_on="$10; hours_on=int($10)}
+/Serial Number:/{print "serial="$3}
+
+# NVMe common
+/NVMe/{type="nvme"}
+/Temperature:/{print "temp="$2}
+/SMART overall-health self-assessment test result:/{print "health="$6}
+/Power On Hours:/{gsub("[^0-9]","",$4); print "hours_on="$4}
+/Serial Number:/{print "serial="$3}
+/Power Cycles:/{print "pwr_cyc="$3}
+
+# NVMe specific
+/Media and Data Integrity Errors:/{print "nvme_err="$6}
+
+# SMART self-test info
+/Self-test execution status:/{progress=tolower($4)} # SAS
+/SMART Self-test log/{test_seen=1} # SAS
+/SMART Extended Self-test Log/{test_seen=1} # SATA
+/# 1/{
+	test_type=tolower($3"_"$4);
+	# Status could be one word ("Completed") or multiple ("Completed: read
+	# failure").  Look for the ":" to see if we need to grab more words.
+
+	if ($5 ~ ":")
+		status=tolower($5""$6"_"$7)
+	else
+		status=tolower($5)
+	if (status=="self")
+		status="running";
+
+	if (type == "sas") {
+		hours=int($(NF-4))
+	} else {
+		hours=int($(NF-1))
+		# SATA reports percent remaining, rather than percent done
+		# Convert it to percent done.
+		progress=(100-int($(NF-2)))"%"
+	}
+	# When we int()-ify "hours", it converts stuff like "NOW" and "-" into
+	# 0.  In those cases, set it to hours_on, so they will cancel out in
+	# the "hours_ago" calculation later on.
+	if (hours == 0)
+		hours=hours_on
+
+	if (test_seen) {
+		print "test="hours_on
+		print "test_type="test_type
+		print "test_status="status
+		print "test_progress="progress
+	}
+	# Not all drives report hours_on
+	if (hours_on && hours) {
+		total_hours_ago=(hours_on-hours)
+		days_ago=int(total_hours_ago/24)
+		hours_ago=(total_hours_ago % 24)
+		if (days_ago != 0)
+			ago_str=days_ago"d"
+		if (hours_ago !=0)
+			ago_str=ago_str""hours_ago"h"
+		print "test_ended="ago_str
+	}
+}
+
+END {print "type="type; ORS="\n"; print ""}
+');
+fi
+type=$(echo "$out" | grep '^type=' | cut -d '=' -f 2)
+
+# If type is not set by now, either we don't have a block device
+# or smartctl failed. Either way, default to ATA and set $out to
+# nothing.
+if [ -z "$type" ]; then
+	type="sata"
+	out=
+fi
+
+case $script in
+smart)
+	# Print temperature plus common predictors of drive failure
+	if [ "$type" = "sas" ] ; then
+		scripts="temp|health|r_ucor|w_ucor"
+	elif [ "$type" = "sata" ] ; then
+		scripts="temp|health|ata_err|realloc|rep_ucor|cmd_to|pend_sec|off_ucor"
+	elif [ "$type" = "nvme" ] ; then
+		scripts="temp|health|nvme_err"
+	fi
+	;;
+smartx)
+	# Print some other interesting stats
+	if [ "$type" = "sas" ] ; then
+		scripts="hours_on|defect|nonmed|r_proc|w_proc"
+	elif [ "$type" = "sata" ] ; then
+		scripts="hours_on|pwr_cyc"
+	elif [ "$type" = "nvme" ] ; then
+		scripts="hours_on|pwr_cyc"
+	fi
+	;;
+smart_test)
+	scripts="test_type|test_status|test_progress|test_ended"
+	;;
+*)
+	scripts="$script"
+esac
+
+with_vals=$(echo "$out" | grep -E "$scripts")
+if [ -n "$with_vals" ]; then
+	echo "$with_vals"
+	without_vals=$(echo "$scripts" | tr "|" "\n" |
+		grep -v -E "$(echo "$with_vals" |
+		awk -F "=" '{print $1}')" | awk '{print $0"="}')
+else
+	without_vals=$(echo "$scripts" | tr "|" "\n" | awk '{print $0"="}')
+fi
+
+if [ -n "$without_vals" ]; then
+	echo "$without_vals"
+fi
diff --git a/cmd/zpool/zpool.d/smart_test b/cmd/zpool/zpool.d/smart_test
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/smart_test
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/smartx b/cmd/zpool/zpool.d/smartx
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/smartx
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/temp b/cmd/zpool/zpool.d/temp
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/temp
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/test_ended b/cmd/zpool/zpool.d/test_ended
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/test_ended
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/test_progress b/cmd/zpool/zpool.d/test_progress
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/test_progress
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/test_status b/cmd/zpool/zpool.d/test_status
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/test_status
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/test_type b/cmd/zpool/zpool.d/test_type
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/test_type
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/upath b/cmd/zpool/zpool.d/upath
new file mode 100755
index 000000000000..16a4327d4850
--- /dev/null
+++ b/cmd/zpool/zpool.d/upath
@@ -0,0 +1,7 @@
+#!/bin/sh
+if [ "$1" = "-h" ] ; then
+	echo "Show the underlying path for a device."
+	exit
+fi
+
+echo upath="$VDEV_UPATH"
diff --git a/cmd/zpool/zpool.d/vendor b/cmd/zpool/zpool.d/vendor
new file mode 120000
index 000000000000..7d1e766add99
--- /dev/null
+++ b/cmd/zpool/zpool.d/vendor
@@ -0,0 +1 @@
+lsblk
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/w_proc b/cmd/zpool/zpool.d/w_proc
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/w_proc
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool.d/w_ucor b/cmd/zpool/zpool.d/w_ucor
new file mode 120000
index 000000000000..94f22861f0ce
--- /dev/null
+++ b/cmd/zpool/zpool.d/w_ucor
@@ -0,0 +1 @@
+smart
\ No newline at end of file
diff --git a/cmd/zpool/zpool_iter.c b/cmd/zpool/zpool_iter.c
new file mode 100644
index 000000000000..5f3153bca2c2
--- /dev/null
+++ b/cmd/zpool/zpool_iter.c
@@ -0,0 +1,757 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>.
+ */
+
+#include <libintl.h>
+#include <libuutil.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <thread_pool.h>
+
+#include <libzfs.h>
+#include <libzutil.h>
+#include <sys/zfs_context.h>
+#include <sys/wait.h>
+
+#include "zpool_util.h"
+
+/*
+ * Private interface for iterating over pools specified on the command line.
+ * Most consumers will call for_each_pool, but in order to support iostat, we
+ * allow fined grained control through the zpool_list_t interface.
+ */
+
+typedef struct zpool_node {
+	zpool_handle_t	*zn_handle;
+	uu_avl_node_t	zn_avlnode;
+	int		zn_mark;
+} zpool_node_t;
+
+struct zpool_list {
+	boolean_t	zl_findall;
+	uu_avl_t	*zl_avl;
+	uu_avl_pool_t	*zl_pool;
+	zprop_list_t	**zl_proplist;
+};
+
+/* ARGSUSED */
+static int
+zpool_compare(const void *larg, const void *rarg, void *unused)
+{
+	zpool_handle_t *l = ((zpool_node_t *)larg)->zn_handle;
+	zpool_handle_t *r = ((zpool_node_t *)rarg)->zn_handle;
+	const char *lname = zpool_get_name(l);
+	const char *rname = zpool_get_name(r);
+
+	return (strcmp(lname, rname));
+}
+
+/*
+ * Callback function for pool_list_get().  Adds the given pool to the AVL tree
+ * of known pools.
+ */
+static int
+add_pool(zpool_handle_t *zhp, void *data)
+{
+	zpool_list_t *zlp = data;
+	zpool_node_t *node = safe_malloc(sizeof (zpool_node_t));
+	uu_avl_index_t idx;
+
+	node->zn_handle = zhp;
+	uu_avl_node_init(node, &node->zn_avlnode, zlp->zl_pool);
+	if (uu_avl_find(zlp->zl_avl, node, NULL, &idx) == NULL) {
+		if (zlp->zl_proplist &&
+		    zpool_expand_proplist(zhp, zlp->zl_proplist) != 0) {
+			zpool_close(zhp);
+			free(node);
+			return (-1);
+		}
+		uu_avl_insert(zlp->zl_avl, node, idx);
+	} else {
+		zpool_close(zhp);
+		free(node);
+		return (-1);
+	}
+
+	return (0);
+}
+
+/*
+ * Create a list of pools based on the given arguments.  If we're given no
+ * arguments, then iterate over all pools in the system and add them to the AVL
+ * tree.  Otherwise, add only those pool explicitly specified on the command
+ * line.
+ */
+zpool_list_t *
+pool_list_get(int argc, char **argv, zprop_list_t **proplist, int *err)
+{
+	zpool_list_t *zlp;
+
+	zlp = safe_malloc(sizeof (zpool_list_t));
+
+	zlp->zl_pool = uu_avl_pool_create("zfs_pool", sizeof (zpool_node_t),
+	    offsetof(zpool_node_t, zn_avlnode), zpool_compare, UU_DEFAULT);
+
+	if (zlp->zl_pool == NULL)
+		zpool_no_memory();
+
+	if ((zlp->zl_avl = uu_avl_create(zlp->zl_pool, NULL,
+	    UU_DEFAULT)) == NULL)
+		zpool_no_memory();
+
+	zlp->zl_proplist = proplist;
+
+	if (argc == 0) {
+		(void) zpool_iter(g_zfs, add_pool, zlp);
+		zlp->zl_findall = B_TRUE;
+	} else {
+		int i;
+
+		for (i = 0; i < argc; i++) {
+			zpool_handle_t *zhp;
+
+			if ((zhp = zpool_open_canfail(g_zfs, argv[i])) !=
+			    NULL) {
+				if (add_pool(zhp, zlp) != 0)
+					*err = B_TRUE;
+			} else {
+				*err = B_TRUE;
+			}
+		}
+	}
+
+	return (zlp);
+}
+
+/*
+ * Search for any new pools, adding them to the list.  We only add pools when no
+ * options were given on the command line.  Otherwise, we keep the list fixed as
+ * those that were explicitly specified.
+ */
+void
+pool_list_update(zpool_list_t *zlp)
+{
+	if (zlp->zl_findall)
+		(void) zpool_iter(g_zfs, add_pool, zlp);
+}
+
+/*
+ * Iterate over all pools in the list, executing the callback for each
+ */
+int
+pool_list_iter(zpool_list_t *zlp, int unavail, zpool_iter_f func,
+    void *data)
+{
+	zpool_node_t *node, *next_node;
+	int ret = 0;
+
+	for (node = uu_avl_first(zlp->zl_avl); node != NULL; node = next_node) {
+		next_node = uu_avl_next(zlp->zl_avl, node);
+		if (zpool_get_state(node->zn_handle) != POOL_STATE_UNAVAIL ||
+		    unavail)
+			ret |= func(node->zn_handle, data);
+	}
+
+	return (ret);
+}
+
+/*
+ * Remove the given pool from the list.  When running iostat, we want to remove
+ * those pools that no longer exist.
+ */
+void
+pool_list_remove(zpool_list_t *zlp, zpool_handle_t *zhp)
+{
+	zpool_node_t search, *node;
+
+	search.zn_handle = zhp;
+	if ((node = uu_avl_find(zlp->zl_avl, &search, NULL, NULL)) != NULL) {
+		uu_avl_remove(zlp->zl_avl, node);
+		zpool_close(node->zn_handle);
+		free(node);
+	}
+}
+
+/*
+ * Free all the handles associated with this list.
+ */
+void
+pool_list_free(zpool_list_t *zlp)
+{
+	uu_avl_walk_t *walk;
+	zpool_node_t *node;
+
+	if ((walk = uu_avl_walk_start(zlp->zl_avl, UU_WALK_ROBUST)) == NULL) {
+		(void) fprintf(stderr,
+		    gettext("internal error: out of memory"));
+		exit(1);
+	}
+
+	while ((node = uu_avl_walk_next(walk)) != NULL) {
+		uu_avl_remove(zlp->zl_avl, node);
+		zpool_close(node->zn_handle);
+		free(node);
+	}
+
+	uu_avl_walk_end(walk);
+	uu_avl_destroy(zlp->zl_avl);
+	uu_avl_pool_destroy(zlp->zl_pool);
+
+	free(zlp);
+}
+
+/*
+ * Returns the number of elements in the pool list.
+ */
+int
+pool_list_count(zpool_list_t *zlp)
+{
+	return (uu_avl_numnodes(zlp->zl_avl));
+}
+
+/*
+ * High level function which iterates over all pools given on the command line,
+ * using the pool_list_* interfaces.
+ */
+int
+for_each_pool(int argc, char **argv, boolean_t unavail,
+    zprop_list_t **proplist, zpool_iter_f func, void *data)
+{
+	zpool_list_t *list;
+	int ret = 0;
+
+	if ((list = pool_list_get(argc, argv, proplist, &ret)) == NULL)
+		return (1);
+
+	if (pool_list_iter(list, unavail, func, data) != 0)
+		ret = 1;
+
+	pool_list_free(list);
+
+	return (ret);
+}
+
+static int
+for_each_vdev_cb(zpool_handle_t *zhp, nvlist_t *nv, pool_vdev_iter_f func,
+    void *data)
+{
+	nvlist_t **child;
+	uint_t c, children;
+	int ret = 0;
+	int i;
+	char *type;
+
+	const char *list[] = {
+	    ZPOOL_CONFIG_SPARES,
+	    ZPOOL_CONFIG_L2CACHE,
+	    ZPOOL_CONFIG_CHILDREN
+	};
+
+	for (i = 0; i < ARRAY_SIZE(list); i++) {
+		if (nvlist_lookup_nvlist_array(nv, list[i], &child,
+		    &children) == 0) {
+			for (c = 0; c < children; c++) {
+				uint64_t ishole = 0;
+
+				(void) nvlist_lookup_uint64(child[c],
+				    ZPOOL_CONFIG_IS_HOLE, &ishole);
+
+				if (ishole)
+					continue;
+
+				ret |= for_each_vdev_cb(zhp, child[c], func,
+				    data);
+			}
+		}
+	}
+
+	if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0)
+		return (ret);
+
+	/* Don't run our function on root vdevs */
+	if (strcmp(type, VDEV_TYPE_ROOT) != 0) {
+		ret |= func(zhp, nv, data);
+	}
+
+	return (ret);
+}
+
+/*
+ * This is the equivalent of for_each_pool() for vdevs.  It iterates thorough
+ * all vdevs in the pool, ignoring root vdevs and holes, calling func() on
+ * each one.
+ *
+ * @zhp:	Zpool handle
+ * @func:	Function to call on each vdev
+ * @data:	Custom data to pass to the function
+ */
+int
+for_each_vdev(zpool_handle_t *zhp, pool_vdev_iter_f func, void *data)
+{
+	nvlist_t *config, *nvroot = NULL;
+
+	if ((config = zpool_get_config(zhp, NULL)) != NULL) {
+		verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+		    &nvroot) == 0);
+	}
+	return (for_each_vdev_cb(zhp, nvroot, func, data));
+}
+
+/*
+ * Process the vcdl->vdev_cmd_data[] array to figure out all the unique column
+ * names and their widths.  When this function is done, vcdl->uniq_cols,
+ * vcdl->uniq_cols_cnt, and vcdl->uniq_cols_width will be filled in.
+ */
+static void
+process_unique_cmd_columns(vdev_cmd_data_list_t *vcdl)
+{
+	char **uniq_cols = NULL, **tmp = NULL;
+	int *uniq_cols_width;
+	vdev_cmd_data_t *data;
+	int cnt = 0;
+	int k;
+
+	/* For each vdev */
+	for (int i = 0; i < vcdl->count; i++) {
+		data = &vcdl->data[i];
+		/* For each column the vdev reported */
+		for (int j = 0; j < data->cols_cnt; j++) {
+			/* Is this column in our list of unique column names? */
+			for (k = 0; k < cnt; k++) {
+				if (strcmp(data->cols[j], uniq_cols[k]) == 0)
+					break; /* yes it is */
+			}
+			if (k == cnt) {
+				/* No entry for column, add to list */
+				tmp = realloc(uniq_cols, sizeof (*uniq_cols) *
+				    (cnt + 1));
+				if (tmp == NULL)
+					break; /* Nothing we can do... */
+				uniq_cols = tmp;
+				uniq_cols[cnt] = data->cols[j];
+				cnt++;
+			}
+		}
+	}
+
+	/*
+	 * We now have a list of all the unique column names.  Figure out the
+	 * max width of each column by looking at the column name and all its
+	 * values.
+	 */
+	uniq_cols_width = safe_malloc(sizeof (*uniq_cols_width) * cnt);
+	for (int i = 0; i < cnt; i++) {
+		/* Start off with the column title's width */
+		uniq_cols_width[i] = strlen(uniq_cols[i]);
+		/* For each vdev */
+		for (int j = 0; j < vcdl->count; j++) {
+			/* For each of the vdev's values in a column */
+			data = &vcdl->data[j];
+			for (k = 0; k < data->cols_cnt; k++) {
+				/* Does this vdev have a value for this col? */
+				if (strcmp(data->cols[k], uniq_cols[i]) == 0) {
+					/* Is the value width larger? */
+					uniq_cols_width[i] =
+					    MAX(uniq_cols_width[i],
+					    strlen(data->lines[k]));
+				}
+			}
+		}
+	}
+
+	vcdl->uniq_cols = uniq_cols;
+	vcdl->uniq_cols_cnt = cnt;
+	vcdl->uniq_cols_width = uniq_cols_width;
+}
+
+
+/*
+ * Process a line of command output
+ *
+ * When running 'zpool iostat|status -c' the lines of output can either be
+ * in the form of:
+ *
+ *	column_name=value
+ *
+ * Or just:
+ *
+ *	value
+ *
+ * Process the column_name (if any) and value.
+ *
+ * Returns 0 if line was processed, and there are more lines can still be
+ * processed.
+ *
+ * Returns 1 if this was the last line to process, or error.
+ */
+static int
+vdev_process_cmd_output(vdev_cmd_data_t *data, char *line)
+{
+	char *col = NULL;
+	char *val = line;
+	char *equals;
+	char **tmp;
+
+	if (line == NULL)
+		return (1);
+
+	equals = strchr(line, '=');
+	if (equals != NULL) {
+		/*
+		 * We have a 'column=value' type line.  Split it into the
+		 * column and value strings by turning the '=' into a '\0'.
+		 */
+		*equals = '\0';
+		col = line;
+		val = equals + 1;
+	} else {
+		val = line;
+	}
+
+	/* Do we already have a column by this name?  If so, skip it. */
+	if (col != NULL) {
+		for (int i = 0; i < data->cols_cnt; i++) {
+			if (strcmp(col, data->cols[i]) == 0)
+				return (0); /* Duplicate, skip */
+		}
+	}
+
+	if (val != NULL) {
+		tmp = realloc(data->lines,
+		    (data->lines_cnt + 1) * sizeof (*data->lines));
+		if (tmp == NULL)
+			return (1);
+
+		data->lines = tmp;
+		data->lines[data->lines_cnt] = strdup(val);
+		data->lines_cnt++;
+	}
+
+	if (col != NULL) {
+		tmp = realloc(data->cols,
+		    (data->cols_cnt + 1) * sizeof (*data->cols));
+		if (tmp == NULL)
+			return (1);
+
+		data->cols = tmp;
+		data->cols[data->cols_cnt] = strdup(col);
+		data->cols_cnt++;
+	}
+
+	if (val != NULL && col == NULL)
+		return (1);
+
+	return (0);
+}
+
+/*
+ * Run the cmd and store results in *data.
+ */
+static void
+vdev_run_cmd(vdev_cmd_data_t *data, char *cmd)
+{
+	int rc;
+	char *argv[2] = {cmd, 0};
+	char *env[5] = {"PATH=/bin:/sbin:/usr/bin:/usr/sbin", NULL, NULL, NULL,
+	    NULL};
+	char **lines = NULL;
+	int lines_cnt = 0;
+	int i;
+
+	/* Setup our custom environment variables */
+	rc = asprintf(&env[1], "VDEV_PATH=%s",
+	    data->path ? data->path : "");
+	if (rc == -1)
+		goto out;
+
+	rc = asprintf(&env[2], "VDEV_UPATH=%s",
+	    data->upath ? data->upath : "");
+	if (rc == -1)
+		goto out;
+
+	rc = asprintf(&env[3], "VDEV_ENC_SYSFS_PATH=%s",
+	    data->vdev_enc_sysfs_path ?
+	    data->vdev_enc_sysfs_path : "");
+	if (rc == -1)
+		goto out;
+
+	/* Run the command */
+	rc = libzfs_run_process_get_stdout_nopath(cmd, argv, env, &lines,
+	    &lines_cnt);
+	if (rc != 0)
+		goto out;
+
+	/* Process the output we got */
+	for (i = 0; i < lines_cnt; i++)
+		if (vdev_process_cmd_output(data, lines[i]) != 0)
+			break;
+
+out:
+	if (lines != NULL)
+		libzfs_free_str_array(lines, lines_cnt);
+
+	/* Start with i = 1 since env[0] was statically allocated */
+	for (i = 1; i < ARRAY_SIZE(env); i++)
+		if (env[i] != NULL)
+			free(env[i]);
+}
+
+/*
+ * Generate the search path for zpool iostat/status -c scripts.
+ * The string returned must be freed.
+ */
+char *
+zpool_get_cmd_search_path(void)
+{
+	const char *env;
+	char *sp = NULL;
+
+	env = getenv("ZPOOL_SCRIPTS_PATH");
+	if (env != NULL)
+		return (strdup(env));
+
+	env = getenv("HOME");
+	if (env != NULL) {
+		if (asprintf(&sp, "%s/.zpool.d:%s",
+		    env, ZPOOL_SCRIPTS_DIR) != -1) {
+			return (sp);
+		}
+	}
+
+	if (asprintf(&sp, "%s", ZPOOL_SCRIPTS_DIR) != -1)
+		return (sp);
+
+	return (NULL);
+}
+
+/* Thread function run for each vdev */
+static void
+vdev_run_cmd_thread(void *cb_cmd_data)
+{
+	vdev_cmd_data_t *data = cb_cmd_data;
+	char *cmd = NULL, *cmddup, *cmdrest;
+
+	cmddup = strdup(data->cmd);
+	if (cmddup == NULL)
+		return;
+
+	cmdrest = cmddup;
+	while ((cmd = strtok_r(cmdrest, ",", &cmdrest))) {
+		char *dir = NULL, *sp, *sprest;
+		char fullpath[MAXPATHLEN];
+
+		if (strchr(cmd, '/') != NULL)
+			continue;
+
+		sp = zpool_get_cmd_search_path();
+		if (sp == NULL)
+			continue;
+
+		sprest = sp;
+		while ((dir = strtok_r(sprest, ":", &sprest))) {
+			if (snprintf(fullpath, sizeof (fullpath),
+			    "%s/%s", dir, cmd) == -1)
+				continue;
+
+			if (access(fullpath, X_OK) == 0) {
+				vdev_run_cmd(data, fullpath);
+				break;
+			}
+		}
+		free(sp);
+	}
+	free(cmddup);
+}
+
+/* For each vdev in the pool run a command */
+static int
+for_each_vdev_run_cb(zpool_handle_t *zhp, nvlist_t *nv, void *cb_vcdl)
+{
+	vdev_cmd_data_list_t *vcdl = cb_vcdl;
+	vdev_cmd_data_t *data;
+	char *path = NULL;
+	char *vname = NULL;
+	char *vdev_enc_sysfs_path = NULL;
+	int i, match = 0;
+
+	if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) != 0)
+		return (1);
+
+	nvlist_lookup_string(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH,
+	    &vdev_enc_sysfs_path);
+
+	/* Spares show more than once if they're in use, so skip if exists */
+	for (i = 0; i < vcdl->count; i++) {
+		if ((strcmp(vcdl->data[i].path, path) == 0) &&
+		    (strcmp(vcdl->data[i].pool, zpool_get_name(zhp)) == 0)) {
+			/* vdev already exists, skip it */
+			return (0);
+		}
+	}
+
+	/* Check for selected vdevs here, if any */
+	for (i = 0; i < vcdl->vdev_names_count; i++) {
+		vname = zpool_vdev_name(g_zfs, zhp, nv, vcdl->cb_name_flags);
+		if (strcmp(vcdl->vdev_names[i], vname) == 0) {
+			free(vname);
+			match = 1;
+			break; /* match */
+		}
+		free(vname);
+	}
+
+	/* If we selected vdevs, and this isn't one of them, then bail out */
+	if (!match && vcdl->vdev_names_count)
+		return (0);
+
+	/*
+	 * Resize our array and add in the new element.
+	 */
+	if (!(vcdl->data = realloc(vcdl->data,
+	    sizeof (*vcdl->data) * (vcdl->count + 1))))
+		return (ENOMEM);	/* couldn't realloc */
+
+	data = &vcdl->data[vcdl->count];
+
+	data->pool = strdup(zpool_get_name(zhp));
+	data->path = strdup(path);
+	data->upath = zfs_get_underlying_path(path);
+	data->cmd = vcdl->cmd;
+	data->lines = data->cols = NULL;
+	data->lines_cnt = data->cols_cnt = 0;
+	if (vdev_enc_sysfs_path)
+		data->vdev_enc_sysfs_path = strdup(vdev_enc_sysfs_path);
+	else
+		data->vdev_enc_sysfs_path = NULL;
+
+	vcdl->count++;
+
+	return (0);
+}
+
+/* Get the names and count of the vdevs */
+static int
+all_pools_for_each_vdev_gather_cb(zpool_handle_t *zhp, void *cb_vcdl)
+{
+	return (for_each_vdev(zhp, for_each_vdev_run_cb, cb_vcdl));
+}
+
+/*
+ * Now that vcdl is populated with our complete list of vdevs, spawn
+ * off the commands.
+ */
+static void
+all_pools_for_each_vdev_run_vcdl(vdev_cmd_data_list_t *vcdl)
+{
+	tpool_t *t;
+
+	t = tpool_create(1, 5 * sysconf(_SC_NPROCESSORS_ONLN), 0, NULL);
+	if (t == NULL)
+		return;
+
+	/* Spawn off the command for each vdev */
+	for (int i = 0; i < vcdl->count; i++) {
+		(void) tpool_dispatch(t, vdev_run_cmd_thread,
+		    (void *) &vcdl->data[i]);
+	}
+
+	/* Wait for threads to finish */
+	tpool_wait(t);
+	tpool_destroy(t);
+}
+
+/*
+ * Run command 'cmd' on all vdevs in all pools in argv.  Saves the first line of
+ * output from the command in vcdk->data[].line for all vdevs.  If you want
+ * to run the command on only certain vdevs, fill in g_zfs, vdev_names,
+ * vdev_names_count, and cb_name_flags.  Otherwise leave them as zero.
+ *
+ * Returns a vdev_cmd_data_list_t that must be freed with
+ * free_vdev_cmd_data_list();
+ */
+vdev_cmd_data_list_t *
+all_pools_for_each_vdev_run(int argc, char **argv, char *cmd,
+    libzfs_handle_t *g_zfs, char **vdev_names, int vdev_names_count,
+    int cb_name_flags)
+{
+	vdev_cmd_data_list_t *vcdl;
+	vcdl = safe_malloc(sizeof (vdev_cmd_data_list_t));
+	vcdl->cmd = cmd;
+
+	vcdl->vdev_names = vdev_names;
+	vcdl->vdev_names_count = vdev_names_count;
+	vcdl->cb_name_flags = cb_name_flags;
+	vcdl->g_zfs = g_zfs;
+
+	/* Gather our list of all vdevs in all pools */
+	for_each_pool(argc, argv, B_TRUE, NULL,
+	    all_pools_for_each_vdev_gather_cb, vcdl);
+
+	/* Run command on all vdevs in all pools */
+	all_pools_for_each_vdev_run_vcdl(vcdl);
+
+	/*
+	 * vcdl->data[] now contains all the column names and values for each
+	 * vdev.  We need to process that into a master list of unique column
+	 * names, and figure out the width of each column.
+	 */
+	process_unique_cmd_columns(vcdl);
+
+	return (vcdl);
+}
+
+/*
+ * Free the vdev_cmd_data_list_t created by all_pools_for_each_vdev_run()
+ */
+void
+free_vdev_cmd_data_list(vdev_cmd_data_list_t *vcdl)
+{
+	free(vcdl->uniq_cols);
+	free(vcdl->uniq_cols_width);
+
+	for (int i = 0; i < vcdl->count; i++) {
+		free(vcdl->data[i].path);
+		free(vcdl->data[i].pool);
+		free(vcdl->data[i].upath);
+
+		for (int j = 0; j < vcdl->data[i].lines_cnt; j++)
+			free(vcdl->data[i].lines[j]);
+
+		free(vcdl->data[i].lines);
+
+		for (int j = 0; j < vcdl->data[i].cols_cnt; j++)
+			free(vcdl->data[i].cols[j]);
+
+		free(vcdl->data[i].cols);
+		free(vcdl->data[i].vdev_enc_sysfs_path);
+	}
+	free(vcdl->data);
+	free(vcdl);
+}
diff --git a/cmd/zpool/zpool_main.c b/cmd/zpool/zpool_main.c
new file mode 100644
index 000000000000..f3756a5d9547
--- /dev/null
+++ b/cmd/zpool/zpool_main.c
@@ -0,0 +1,10326 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
+ * Copyright (c) 2011, 2020 by Delphix. All rights reserved.
+ * Copyright (c) 2012 by Frederik Wessels. All rights reserved.
+ * Copyright (c) 2012 by Cyril Plisko. All rights reserved.
+ * Copyright (c) 2013 by Prasad Joshi (sTec). All rights reserved.
+ * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>.
+ * Copyright (c) 2017 Datto Inc.
+ * Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
+ * Copyright (c) 2017, Intel Corporation.
+ * Copyright (c) 2019, loli10K <ezomori.nozomu@gmail.com>
+ */
+
+#include <assert.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <libgen.h>
+#include <libintl.h>
+#include <libuutil.h>
+#include <locale.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <time.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <zone.h>
+#include <sys/wait.h>
+#include <zfs_prop.h>
+#include <sys/fs/zfs.h>
+#include <sys/stat.h>
+#include <sys/systeminfo.h>
+#include <sys/fm/fs/zfs.h>
+#include <sys/fm/util.h>
+#include <sys/fm/protocol.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/mount.h>
+#include <sys/sysmacros.h>
+
+#include <math.h>
+
+#include <libzfs.h>
+#include <libzutil.h>
+
+#include "zpool_util.h"
+#include "zfs_comutil.h"
+#include "zfeature_common.h"
+
+#include "statcommon.h"
+
+libzfs_handle_t *g_zfs;
+
+static int zpool_do_create(int, char **);
+static int zpool_do_destroy(int, char **);
+
+static int zpool_do_add(int, char **);
+static int zpool_do_remove(int, char **);
+static int zpool_do_labelclear(int, char **);
+
+static int zpool_do_checkpoint(int, char **);
+
+static int zpool_do_list(int, char **);
+static int zpool_do_iostat(int, char **);
+static int zpool_do_status(int, char **);
+
+static int zpool_do_online(int, char **);
+static int zpool_do_offline(int, char **);
+static int zpool_do_clear(int, char **);
+static int zpool_do_reopen(int, char **);
+
+static int zpool_do_reguid(int, char **);
+
+static int zpool_do_attach(int, char **);
+static int zpool_do_detach(int, char **);
+static int zpool_do_replace(int, char **);
+static int zpool_do_split(int, char **);
+
+static int zpool_do_initialize(int, char **);
+static int zpool_do_scrub(int, char **);
+static int zpool_do_resilver(int, char **);
+static int zpool_do_trim(int, char **);
+
+static int zpool_do_import(int, char **);
+static int zpool_do_export(int, char **);
+
+static int zpool_do_upgrade(int, char **);
+
+static int zpool_do_history(int, char **);
+static int zpool_do_events(int, char **);
+
+static int zpool_do_get(int, char **);
+static int zpool_do_set(int, char **);
+
+static int zpool_do_sync(int, char **);
+
+static int zpool_do_version(int, char **);
+
+static int zpool_do_wait(int, char **);
+
+/*
+ * These libumem hooks provide a reasonable set of defaults for the allocator's
+ * debugging facilities.
+ */
+
+#ifdef DEBUG
+const char *
+_umem_debug_init(void)
+{
+	return ("default,verbose"); /* $UMEM_DEBUG setting */
+}
+
+const char *
+_umem_logging_init(void)
+{
+	return ("fail,contents"); /* $UMEM_LOGGING setting */
+}
+#endif
+
+typedef enum {
+	HELP_ADD,
+	HELP_ATTACH,
+	HELP_CLEAR,
+	HELP_CREATE,
+	HELP_CHECKPOINT,
+	HELP_DESTROY,
+	HELP_DETACH,
+	HELP_EXPORT,
+	HELP_HISTORY,
+	HELP_IMPORT,
+	HELP_IOSTAT,
+	HELP_LABELCLEAR,
+	HELP_LIST,
+	HELP_OFFLINE,
+	HELP_ONLINE,
+	HELP_REPLACE,
+	HELP_REMOVE,
+	HELP_INITIALIZE,
+	HELP_SCRUB,
+	HELP_RESILVER,
+	HELP_TRIM,
+	HELP_STATUS,
+	HELP_UPGRADE,
+	HELP_EVENTS,
+	HELP_GET,
+	HELP_SET,
+	HELP_SPLIT,
+	HELP_SYNC,
+	HELP_REGUID,
+	HELP_REOPEN,
+	HELP_VERSION,
+	HELP_WAIT
+} zpool_help_t;
+
+
+/*
+ * Flags for stats to display with "zpool iostats"
+ */
+enum iostat_type {
+	IOS_DEFAULT = 0,
+	IOS_LATENCY = 1,
+	IOS_QUEUES = 2,
+	IOS_L_HISTO = 3,
+	IOS_RQ_HISTO = 4,
+	IOS_COUNT,	/* always last element */
+};
+
+/* iostat_type entries as bitmasks */
+#define	IOS_DEFAULT_M	(1ULL << IOS_DEFAULT)
+#define	IOS_LATENCY_M	(1ULL << IOS_LATENCY)
+#define	IOS_QUEUES_M	(1ULL << IOS_QUEUES)
+#define	IOS_L_HISTO_M	(1ULL << IOS_L_HISTO)
+#define	IOS_RQ_HISTO_M	(1ULL << IOS_RQ_HISTO)
+
+/* Mask of all the histo bits */
+#define	IOS_ANYHISTO_M (IOS_L_HISTO_M | IOS_RQ_HISTO_M)
+
+/*
+ * Lookup table for iostat flags to nvlist names.  Basically a list
+ * of all the nvlists a flag requires.  Also specifies the order in
+ * which data gets printed in zpool iostat.
+ */
+static const char *vsx_type_to_nvlist[IOS_COUNT][13] = {
+	[IOS_L_HISTO] = {
+	    ZPOOL_CONFIG_VDEV_TOT_R_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_TOT_W_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_DISK_R_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_DISK_W_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_SYNC_R_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_SYNC_W_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_ASYNC_R_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_ASYNC_W_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_SCRUB_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_TRIM_LAT_HISTO,
+	    NULL},
+	[IOS_LATENCY] = {
+	    ZPOOL_CONFIG_VDEV_TOT_R_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_TOT_W_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_DISK_R_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_DISK_W_LAT_HISTO,
+	    ZPOOL_CONFIG_VDEV_TRIM_LAT_HISTO,
+	    NULL},
+	[IOS_QUEUES] = {
+	    ZPOOL_CONFIG_VDEV_SYNC_R_ACTIVE_QUEUE,
+	    ZPOOL_CONFIG_VDEV_SYNC_W_ACTIVE_QUEUE,
+	    ZPOOL_CONFIG_VDEV_ASYNC_R_ACTIVE_QUEUE,
+	    ZPOOL_CONFIG_VDEV_ASYNC_W_ACTIVE_QUEUE,
+	    ZPOOL_CONFIG_VDEV_SCRUB_ACTIVE_QUEUE,
+	    ZPOOL_CONFIG_VDEV_TRIM_ACTIVE_QUEUE,
+	    NULL},
+	[IOS_RQ_HISTO] = {
+	    ZPOOL_CONFIG_VDEV_SYNC_IND_R_HISTO,
+	    ZPOOL_CONFIG_VDEV_SYNC_AGG_R_HISTO,
+	    ZPOOL_CONFIG_VDEV_SYNC_IND_W_HISTO,
+	    ZPOOL_CONFIG_VDEV_SYNC_AGG_W_HISTO,
+	    ZPOOL_CONFIG_VDEV_ASYNC_IND_R_HISTO,
+	    ZPOOL_CONFIG_VDEV_ASYNC_AGG_R_HISTO,
+	    ZPOOL_CONFIG_VDEV_ASYNC_IND_W_HISTO,
+	    ZPOOL_CONFIG_VDEV_ASYNC_AGG_W_HISTO,
+	    ZPOOL_CONFIG_VDEV_IND_SCRUB_HISTO,
+	    ZPOOL_CONFIG_VDEV_AGG_SCRUB_HISTO,
+	    ZPOOL_CONFIG_VDEV_IND_TRIM_HISTO,
+	    ZPOOL_CONFIG_VDEV_AGG_TRIM_HISTO,
+	    NULL},
+};
+
+
+/*
+ * Given a cb->cb_flags with a histogram bit set, return the iostat_type.
+ * Right now, only one histo bit is ever set at one time, so we can
+ * just do a highbit64(a)
+ */
+#define	IOS_HISTO_IDX(a)	(highbit64(a & IOS_ANYHISTO_M) - 1)
+
+typedef struct zpool_command {
+	const char	*name;
+	int		(*func)(int, char **);
+	zpool_help_t	usage;
+} zpool_command_t;
+
+/*
+ * Master command table.  Each ZFS command has a name, associated function, and
+ * usage message.  The usage messages need to be internationalized, so we have
+ * to have a function to return the usage message based on a command index.
+ *
+ * These commands are organized according to how they are displayed in the usage
+ * message.  An empty command (one with a NULL name) indicates an empty line in
+ * the generic usage message.
+ */
+static zpool_command_t command_table[] = {
+	{ "version",	zpool_do_version,	HELP_VERSION		},
+	{ NULL },
+	{ "create",	zpool_do_create,	HELP_CREATE		},
+	{ "destroy",	zpool_do_destroy,	HELP_DESTROY		},
+	{ NULL },
+	{ "add",	zpool_do_add,		HELP_ADD		},
+	{ "remove",	zpool_do_remove,	HELP_REMOVE		},
+	{ NULL },
+	{ "labelclear",	zpool_do_labelclear,	HELP_LABELCLEAR		},
+	{ NULL },
+	{ "checkpoint",	zpool_do_checkpoint,	HELP_CHECKPOINT		},
+	{ NULL },
+	{ "list",	zpool_do_list,		HELP_LIST		},
+	{ "iostat",	zpool_do_iostat,	HELP_IOSTAT		},
+	{ "status",	zpool_do_status,	HELP_STATUS		},
+	{ NULL },
+	{ "online",	zpool_do_online,	HELP_ONLINE		},
+	{ "offline",	zpool_do_offline,	HELP_OFFLINE		},
+	{ "clear",	zpool_do_clear,		HELP_CLEAR		},
+	{ "reopen",	zpool_do_reopen,	HELP_REOPEN		},
+	{ NULL },
+	{ "attach",	zpool_do_attach,	HELP_ATTACH		},
+	{ "detach",	zpool_do_detach,	HELP_DETACH		},
+	{ "replace",	zpool_do_replace,	HELP_REPLACE		},
+	{ "split",	zpool_do_split,		HELP_SPLIT		},
+	{ NULL },
+	{ "initialize",	zpool_do_initialize,	HELP_INITIALIZE		},
+	{ "resilver",	zpool_do_resilver,	HELP_RESILVER		},
+	{ "scrub",	zpool_do_scrub,		HELP_SCRUB		},
+	{ "trim",	zpool_do_trim,		HELP_TRIM		},
+	{ NULL },
+	{ "import",	zpool_do_import,	HELP_IMPORT		},
+	{ "export",	zpool_do_export,	HELP_EXPORT		},
+	{ "upgrade",	zpool_do_upgrade,	HELP_UPGRADE		},
+	{ "reguid",	zpool_do_reguid,	HELP_REGUID		},
+	{ NULL },
+	{ "history",	zpool_do_history,	HELP_HISTORY		},
+	{ "events",	zpool_do_events,	HELP_EVENTS		},
+	{ NULL },
+	{ "get",	zpool_do_get,		HELP_GET		},
+	{ "set",	zpool_do_set,		HELP_SET		},
+	{ "sync",	zpool_do_sync,		HELP_SYNC		},
+	{ NULL },
+	{ "wait",	zpool_do_wait,		HELP_WAIT		},
+};
+
+#define	NCOMMAND	(ARRAY_SIZE(command_table))
+
+#define	VDEV_ALLOC_CLASS_LOGS	"logs"
+
+static zpool_command_t *current_command;
+static char history_str[HIS_MAX_RECORD_LEN];
+static boolean_t log_history = B_TRUE;
+static uint_t timestamp_fmt = NODATE;
+
+static const char *
+get_usage(zpool_help_t idx)
+{
+	switch (idx) {
+	case HELP_ADD:
+		return (gettext("\tadd [-fgLnP] [-o property=value] "
+		    "<pool> <vdev> ...\n"));
+	case HELP_ATTACH:
+		return (gettext("\tattach [-fsw] [-o property=value] "
+		    "<pool> <device> <new-device>\n"));
+	case HELP_CLEAR:
+		return (gettext("\tclear [-nF] <pool> [device]\n"));
+	case HELP_CREATE:
+		return (gettext("\tcreate [-fnd] [-o property=value] ... \n"
+		    "\t    [-O file-system-property=value] ... \n"
+		    "\t    [-m mountpoint] [-R root] <pool> <vdev> ...\n"));
+	case HELP_CHECKPOINT:
+		return (gettext("\tcheckpoint [-d [-w]] <pool> ...\n"));
+	case HELP_DESTROY:
+		return (gettext("\tdestroy [-f] <pool>\n"));
+	case HELP_DETACH:
+		return (gettext("\tdetach <pool> <device>\n"));
+	case HELP_EXPORT:
+		return (gettext("\texport [-af] <pool> ...\n"));
+	case HELP_HISTORY:
+		return (gettext("\thistory [-il] [<pool>] ...\n"));
+	case HELP_IMPORT:
+		return (gettext("\timport [-d dir] [-D]\n"
+		    "\timport [-o mntopts] [-o property=value] ... \n"
+		    "\t    [-d dir | -c cachefile] [-D] [-l] [-f] [-m] [-N] "
+		    "[-R root] [-F [-n]] -a\n"
+		    "\timport [-o mntopts] [-o property=value] ... \n"
+		    "\t    [-d dir | -c cachefile] [-D] [-l] [-f] [-m] [-N] "
+		    "[-R root] [-F [-n]]\n"
+		    "\t    [--rewind-to-checkpoint] <pool | id> [newpool]\n"));
+	case HELP_IOSTAT:
+		return (gettext("\tiostat [[[-c [script1,script2,...]"
+		    "[-lq]]|[-rw]] [-T d | u] [-ghHLpPvy]\n"
+		    "\t    [[pool ...]|[pool vdev ...]|[vdev ...]]"
+		    " [[-n] interval [count]]\n"));
+	case HELP_LABELCLEAR:
+		return (gettext("\tlabelclear [-f] <vdev>\n"));
+	case HELP_LIST:
+		return (gettext("\tlist [-gHLpPv] [-o property[,...]] "
+		    "[-T d|u] [pool] ... \n"
+		    "\t    [interval [count]]\n"));
+	case HELP_OFFLINE:
+		return (gettext("\toffline [-f] [-t] <pool> <device> ...\n"));
+	case HELP_ONLINE:
+		return (gettext("\tonline [-e] <pool> <device> ...\n"));
+	case HELP_REPLACE:
+		return (gettext("\treplace [-fsw] [-o property=value] "
+		    "<pool> <device> [new-device]\n"));
+	case HELP_REMOVE:
+		return (gettext("\tremove [-npsw] <pool> <device> ...\n"));
+	case HELP_REOPEN:
+		return (gettext("\treopen [-n] <pool>\n"));
+	case HELP_INITIALIZE:
+		return (gettext("\tinitialize [-c | -s] [-w] <pool> "
+		    "[<device> ...]\n"));
+	case HELP_SCRUB:
+		return (gettext("\tscrub [-s | -p] [-w] <pool> ...\n"));
+	case HELP_RESILVER:
+		return (gettext("\tresilver <pool> ...\n"));
+	case HELP_TRIM:
+		return (gettext("\ttrim [-dw] [-r <rate>] [-c | -s] <pool> "
+		    "[<device> ...]\n"));
+	case HELP_STATUS:
+		return (gettext("\tstatus [-c [script1,script2,...]] "
+		    "[-igLpPstvxD]  [-T d|u] [pool] ... \n"
+		    "\t    [interval [count]]\n"));
+	case HELP_UPGRADE:
+		return (gettext("\tupgrade\n"
+		    "\tupgrade -v\n"
+		    "\tupgrade [-V version] <-a | pool ...>\n"));
+	case HELP_EVENTS:
+		return (gettext("\tevents [-vHf [pool] | -c]\n"));
+	case HELP_GET:
+		return (gettext("\tget [-Hp] [-o \"all\" | field[,...]] "
+		    "<\"all\" | property[,...]> <pool> ...\n"));
+	case HELP_SET:
+		return (gettext("\tset <property=value> <pool> \n"));
+	case HELP_SPLIT:
+		return (gettext("\tsplit [-gLnPl] [-R altroot] [-o mntopts]\n"
+		    "\t    [-o property=value] <pool> <newpool> "
+		    "[<device> ...]\n"));
+	case HELP_REGUID:
+		return (gettext("\treguid <pool>\n"));
+	case HELP_SYNC:
+		return (gettext("\tsync [pool] ...\n"));
+	case HELP_VERSION:
+		return (gettext("\tversion\n"));
+	case HELP_WAIT:
+		return (gettext("\twait [-Hp] [-T d|u] [-t <activity>[,...]] "
+		    "<pool> [interval]\n"));
+	}
+
+	abort();
+	/* NOTREACHED */
+}
+
+static void
+zpool_collect_leaves(zpool_handle_t *zhp, nvlist_t *nvroot, nvlist_t *res)
+{
+	uint_t children = 0;
+	nvlist_t **child;
+	uint_t i;
+
+	(void) nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children);
+
+	if (children == 0) {
+		char *path = zpool_vdev_name(g_zfs, zhp, nvroot,
+		    VDEV_NAME_PATH);
+
+		if (strcmp(path, VDEV_TYPE_INDIRECT) != 0 &&
+		    strcmp(path, VDEV_TYPE_HOLE) != 0)
+			fnvlist_add_boolean(res, path);
+
+		free(path);
+		return;
+	}
+
+	for (i = 0; i < children; i++) {
+		zpool_collect_leaves(zhp, child[i], res);
+	}
+}
+
+/*
+ * Callback routine that will print out a pool property value.
+ */
+static int
+print_prop_cb(int prop, void *cb)
+{
+	FILE *fp = cb;
+
+	(void) fprintf(fp, "\t%-19s  ", zpool_prop_to_name(prop));
+
+	if (zpool_prop_readonly(prop))
+		(void) fprintf(fp, "  NO   ");
+	else
+		(void) fprintf(fp, " YES   ");
+
+	if (zpool_prop_values(prop) == NULL)
+		(void) fprintf(fp, "-\n");
+	else
+		(void) fprintf(fp, "%s\n", zpool_prop_values(prop));
+
+	return (ZPROP_CONT);
+}
+
+/*
+ * Display usage message.  If we're inside a command, display only the usage for
+ * that command.  Otherwise, iterate over the entire command table and display
+ * a complete usage message.
+ */
+static void
+usage(boolean_t requested)
+{
+	FILE *fp = requested ? stdout : stderr;
+
+	if (current_command == NULL) {
+		int i;
+
+		(void) fprintf(fp, gettext("usage: zpool command args ...\n"));
+		(void) fprintf(fp,
+		    gettext("where 'command' is one of the following:\n\n"));
+
+		for (i = 0; i < NCOMMAND; i++) {
+			if (command_table[i].name == NULL)
+				(void) fprintf(fp, "\n");
+			else
+				(void) fprintf(fp, "%s",
+				    get_usage(command_table[i].usage));
+		}
+	} else {
+		(void) fprintf(fp, gettext("usage:\n"));
+		(void) fprintf(fp, "%s", get_usage(current_command->usage));
+	}
+
+	if (current_command != NULL &&
+	    ((strcmp(current_command->name, "set") == 0) ||
+	    (strcmp(current_command->name, "get") == 0) ||
+	    (strcmp(current_command->name, "list") == 0))) {
+
+		(void) fprintf(fp,
+		    gettext("\nthe following properties are supported:\n"));
+
+		(void) fprintf(fp, "\n\t%-19s  %s   %s\n\n",
+		    "PROPERTY", "EDIT", "VALUES");
+
+		/* Iterate over all properties */
+		(void) zprop_iter(print_prop_cb, fp, B_FALSE, B_TRUE,
+		    ZFS_TYPE_POOL);
+
+		(void) fprintf(fp, "\t%-19s   ", "feature@...");
+		(void) fprintf(fp, "YES   disabled | enabled | active\n");
+
+		(void) fprintf(fp, gettext("\nThe feature@ properties must be "
+		    "appended with a feature name.\nSee zpool-features(5).\n"));
+	}
+
+	/*
+	 * See comments at end of main().
+	 */
+	if (getenv("ZFS_ABORT") != NULL) {
+		(void) printf("dumping core by request\n");
+		abort();
+	}
+
+	exit(requested ? 0 : 2);
+}
+
+/*
+ * zpool initialize [-c | -s] [-w] <pool> [<vdev> ...]
+ * Initialize all unused blocks in the specified vdevs, or all vdevs in the pool
+ * if none specified.
+ *
+ *	-c	Cancel. Ends active initializing.
+ *	-s	Suspend. Initializing can then be restarted with no flags.
+ *	-w	Wait. Blocks until initializing has completed.
+ */
+int
+zpool_do_initialize(int argc, char **argv)
+{
+	int c;
+	char *poolname;
+	zpool_handle_t *zhp;
+	nvlist_t *vdevs;
+	int err = 0;
+	boolean_t wait = B_FALSE;
+
+	struct option long_options[] = {
+		{"cancel",	no_argument,		NULL, 'c'},
+		{"suspend",	no_argument,		NULL, 's'},
+		{"wait",	no_argument,		NULL, 'w'},
+		{0, 0, 0, 0}
+	};
+
+	pool_initialize_func_t cmd_type = POOL_INITIALIZE_START;
+	while ((c = getopt_long(argc, argv, "csw", long_options, NULL)) != -1) {
+		switch (c) {
+		case 'c':
+			if (cmd_type != POOL_INITIALIZE_START &&
+			    cmd_type != POOL_INITIALIZE_CANCEL) {
+				(void) fprintf(stderr, gettext("-c cannot be "
+				    "combined with other options\n"));
+				usage(B_FALSE);
+			}
+			cmd_type = POOL_INITIALIZE_CANCEL;
+			break;
+		case 's':
+			if (cmd_type != POOL_INITIALIZE_START &&
+			    cmd_type != POOL_INITIALIZE_SUSPEND) {
+				(void) fprintf(stderr, gettext("-s cannot be "
+				    "combined with other options\n"));
+				usage(B_FALSE);
+			}
+			cmd_type = POOL_INITIALIZE_SUSPEND;
+			break;
+		case 'w':
+			wait = B_TRUE;
+			break;
+		case '?':
+			if (optopt != 0) {
+				(void) fprintf(stderr,
+				    gettext("invalid option '%c'\n"), optopt);
+			} else {
+				(void) fprintf(stderr,
+				    gettext("invalid option '%s'\n"),
+				    argv[optind - 1]);
+			}
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name argument\n"));
+		usage(B_FALSE);
+		return (-1);
+	}
+
+	if (wait && (cmd_type != POOL_INITIALIZE_START)) {
+		(void) fprintf(stderr, gettext("-w cannot be used with -c or "
+		    "-s\n"));
+		usage(B_FALSE);
+	}
+
+	poolname = argv[0];
+	zhp = zpool_open(g_zfs, poolname);
+	if (zhp == NULL)
+		return (-1);
+
+	vdevs = fnvlist_alloc();
+	if (argc == 1) {
+		/* no individual leaf vdevs specified, so add them all */
+		nvlist_t *config = zpool_get_config(zhp, NULL);
+		nvlist_t *nvroot = fnvlist_lookup_nvlist(config,
+		    ZPOOL_CONFIG_VDEV_TREE);
+		zpool_collect_leaves(zhp, nvroot, vdevs);
+	} else {
+		for (int i = 1; i < argc; i++) {
+			fnvlist_add_boolean(vdevs, argv[i]);
+		}
+	}
+
+	if (wait)
+		err = zpool_initialize_wait(zhp, cmd_type, vdevs);
+	else
+		err = zpool_initialize(zhp, cmd_type, vdevs);
+
+	fnvlist_free(vdevs);
+	zpool_close(zhp);
+
+	return (err);
+}
+
+/*
+ * print a pool vdev config for dry runs
+ */
+static void
+print_vdev_tree(zpool_handle_t *zhp, const char *name, nvlist_t *nv, int indent,
+    const char *match, int name_flags)
+{
+	nvlist_t **child;
+	uint_t c, children;
+	char *vname;
+	boolean_t printed = B_FALSE;
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0) {
+		if (name != NULL)
+			(void) printf("\t%*s%s\n", indent, "", name);
+		return;
+	}
+
+	for (c = 0; c < children; c++) {
+		uint64_t is_log = B_FALSE;
+		char *class = "";
+
+		(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
+		    &is_log);
+		if (is_log)
+			class = VDEV_ALLOC_BIAS_LOG;
+		(void) nvlist_lookup_string(child[c],
+		    ZPOOL_CONFIG_ALLOCATION_BIAS, &class);
+		if (strcmp(match, class) != 0)
+			continue;
+
+		if (!printed && name != NULL) {
+			(void) printf("\t%*s%s\n", indent, "", name);
+			printed = B_TRUE;
+		}
+		vname = zpool_vdev_name(g_zfs, zhp, child[c], name_flags);
+		print_vdev_tree(zhp, vname, child[c], indent + 2, "",
+		    name_flags);
+		free(vname);
+	}
+}
+
+static boolean_t
+prop_list_contains_feature(nvlist_t *proplist)
+{
+	nvpair_t *nvp;
+	for (nvp = nvlist_next_nvpair(proplist, NULL); NULL != nvp;
+	    nvp = nvlist_next_nvpair(proplist, nvp)) {
+		if (zpool_prop_feature(nvpair_name(nvp)))
+			return (B_TRUE);
+	}
+	return (B_FALSE);
+}
+
+/*
+ * Add a property pair (name, string-value) into a property nvlist.
+ */
+static int
+add_prop_list(const char *propname, char *propval, nvlist_t **props,
+    boolean_t poolprop)
+{
+	zpool_prop_t prop = ZPOOL_PROP_INVAL;
+	nvlist_t *proplist;
+	const char *normnm;
+	char *strval;
+
+	if (*props == NULL &&
+	    nvlist_alloc(props, NV_UNIQUE_NAME, 0) != 0) {
+		(void) fprintf(stderr,
+		    gettext("internal error: out of memory\n"));
+		return (1);
+	}
+
+	proplist = *props;
+
+	if (poolprop) {
+		const char *vname = zpool_prop_to_name(ZPOOL_PROP_VERSION);
+
+		if ((prop = zpool_name_to_prop(propname)) == ZPOOL_PROP_INVAL &&
+		    !zpool_prop_feature(propname)) {
+			(void) fprintf(stderr, gettext("property '%s' is "
+			    "not a valid pool property\n"), propname);
+			return (2);
+		}
+
+		/*
+		 * feature@ properties and version should not be specified
+		 * at the same time.
+		 */
+		if ((prop == ZPOOL_PROP_INVAL && zpool_prop_feature(propname) &&
+		    nvlist_exists(proplist, vname)) ||
+		    (prop == ZPOOL_PROP_VERSION &&
+		    prop_list_contains_feature(proplist))) {
+			(void) fprintf(stderr, gettext("'feature@' and "
+			    "'version' properties cannot be specified "
+			    "together\n"));
+			return (2);
+		}
+
+
+		if (zpool_prop_feature(propname))
+			normnm = propname;
+		else
+			normnm = zpool_prop_to_name(prop);
+	} else {
+		zfs_prop_t fsprop = zfs_name_to_prop(propname);
+
+		if (zfs_prop_valid_for_type(fsprop, ZFS_TYPE_FILESYSTEM,
+		    B_FALSE)) {
+			normnm = zfs_prop_to_name(fsprop);
+		} else if (zfs_prop_user(propname) ||
+		    zfs_prop_userquota(propname)) {
+			normnm = propname;
+		} else {
+			(void) fprintf(stderr, gettext("property '%s' is "
+			    "not a valid filesystem property\n"), propname);
+			return (2);
+		}
+	}
+
+	if (nvlist_lookup_string(proplist, normnm, &strval) == 0 &&
+	    prop != ZPOOL_PROP_CACHEFILE) {
+		(void) fprintf(stderr, gettext("property '%s' "
+		    "specified multiple times\n"), propname);
+		return (2);
+	}
+
+	if (nvlist_add_string(proplist, normnm, propval) != 0) {
+		(void) fprintf(stderr, gettext("internal "
+		    "error: out of memory\n"));
+		return (1);
+	}
+
+	return (0);
+}
+
+/*
+ * Set a default property pair (name, string-value) in a property nvlist
+ */
+static int
+add_prop_list_default(const char *propname, char *propval, nvlist_t **props,
+    boolean_t poolprop)
+{
+	char *pval;
+
+	if (nvlist_lookup_string(*props, propname, &pval) == 0)
+		return (0);
+
+	return (add_prop_list(propname, propval, props, B_TRUE));
+}
+
+/*
+ * zpool add [-fgLnP] [-o property=value] <pool> <vdev> ...
+ *
+ *	-f	Force addition of devices, even if they appear in use
+ *	-g	Display guid for individual vdev name.
+ *	-L	Follow links when resolving vdev path name.
+ *	-n	Do not add the devices, but display the resulting layout if
+ *		they were to be added.
+ *	-o	Set property=value.
+ *	-P	Display full path for vdev name.
+ *
+ * Adds the given vdevs to 'pool'.  As with create, the bulk of this work is
+ * handled by make_root_vdev(), which constructs the nvlist needed to pass to
+ * libzfs.
+ */
+int
+zpool_do_add(int argc, char **argv)
+{
+	boolean_t force = B_FALSE;
+	boolean_t dryrun = B_FALSE;
+	int name_flags = 0;
+	int c;
+	nvlist_t *nvroot;
+	char *poolname;
+	int ret;
+	zpool_handle_t *zhp;
+	nvlist_t *config;
+	nvlist_t *props = NULL;
+	char *propval;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "fgLno:P")) != -1) {
+		switch (c) {
+		case 'f':
+			force = B_TRUE;
+			break;
+		case 'g':
+			name_flags |= VDEV_NAME_GUID;
+			break;
+		case 'L':
+			name_flags |= VDEV_NAME_FOLLOW_LINKS;
+			break;
+		case 'n':
+			dryrun = B_TRUE;
+			break;
+		case 'o':
+			if ((propval = strchr(optarg, '=')) == NULL) {
+				(void) fprintf(stderr, gettext("missing "
+				    "'=' for -o option\n"));
+				usage(B_FALSE);
+			}
+			*propval = '\0';
+			propval++;
+
+			if ((strcmp(optarg, ZPOOL_CONFIG_ASHIFT) != 0) ||
+			    (add_prop_list(optarg, propval, &props, B_TRUE)))
+				usage(B_FALSE);
+			break;
+		case 'P':
+			name_flags |= VDEV_NAME_PATH;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* get pool name and check number of arguments */
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name argument\n"));
+		usage(B_FALSE);
+	}
+	if (argc < 2) {
+		(void) fprintf(stderr, gettext("missing vdev specification\n"));
+		usage(B_FALSE);
+	}
+
+	poolname = argv[0];
+
+	argc--;
+	argv++;
+
+	if ((zhp = zpool_open(g_zfs, poolname)) == NULL)
+		return (1);
+
+	if ((config = zpool_get_config(zhp, NULL)) == NULL) {
+		(void) fprintf(stderr, gettext("pool '%s' is unavailable\n"),
+		    poolname);
+		zpool_close(zhp);
+		return (1);
+	}
+
+	/* unless manually specified use "ashift" pool property (if set) */
+	if (!nvlist_exists(props, ZPOOL_CONFIG_ASHIFT)) {
+		int intval;
+		zprop_source_t src;
+		char strval[ZPOOL_MAXPROPLEN];
+
+		intval = zpool_get_prop_int(zhp, ZPOOL_PROP_ASHIFT, &src);
+		if (src != ZPROP_SRC_DEFAULT) {
+			(void) sprintf(strval, "%" PRId32, intval);
+			verify(add_prop_list(ZPOOL_CONFIG_ASHIFT, strval,
+			    &props, B_TRUE) == 0);
+		}
+	}
+
+	/* pass off to make_root_vdev for processing */
+	nvroot = make_root_vdev(zhp, props, force, !force, B_FALSE, dryrun,
+	    argc, argv);
+	if (nvroot == NULL) {
+		zpool_close(zhp);
+		return (1);
+	}
+
+	if (dryrun) {
+		nvlist_t *poolnvroot;
+		nvlist_t **l2child;
+		uint_t l2children, c;
+		char *vname;
+		boolean_t hadcache = B_FALSE;
+
+		verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+		    &poolnvroot) == 0);
+
+		(void) printf(gettext("would update '%s' to the following "
+		    "configuration:\n"), zpool_get_name(zhp));
+
+		/* print original main pool and new tree */
+		print_vdev_tree(zhp, poolname, poolnvroot, 0, "",
+		    name_flags | VDEV_NAME_TYPE_ID);
+		print_vdev_tree(zhp, NULL, nvroot, 0, "", name_flags);
+
+		/* print other classes: 'dedup', 'special', and 'log' */
+		if (zfs_special_devs(poolnvroot, VDEV_ALLOC_BIAS_DEDUP)) {
+			print_vdev_tree(zhp, "dedup", poolnvroot, 0,
+			    VDEV_ALLOC_BIAS_DEDUP, name_flags);
+			print_vdev_tree(zhp, NULL, nvroot, 0,
+			    VDEV_ALLOC_BIAS_DEDUP, name_flags);
+		} else if (zfs_special_devs(nvroot, VDEV_ALLOC_BIAS_DEDUP)) {
+			print_vdev_tree(zhp, "dedup", nvroot, 0,
+			    VDEV_ALLOC_BIAS_DEDUP, name_flags);
+		}
+
+		if (zfs_special_devs(poolnvroot, VDEV_ALLOC_BIAS_SPECIAL)) {
+			print_vdev_tree(zhp, "special", poolnvroot, 0,
+			    VDEV_ALLOC_BIAS_SPECIAL, name_flags);
+			print_vdev_tree(zhp, NULL, nvroot, 0,
+			    VDEV_ALLOC_BIAS_SPECIAL, name_flags);
+		} else if (zfs_special_devs(nvroot, VDEV_ALLOC_BIAS_SPECIAL)) {
+			print_vdev_tree(zhp, "special", nvroot, 0,
+			    VDEV_ALLOC_BIAS_SPECIAL, name_flags);
+		}
+
+		if (num_logs(poolnvroot) > 0) {
+			print_vdev_tree(zhp, "logs", poolnvroot, 0,
+			    VDEV_ALLOC_BIAS_LOG, name_flags);
+			print_vdev_tree(zhp, NULL, nvroot, 0,
+			    VDEV_ALLOC_BIAS_LOG, name_flags);
+		} else if (num_logs(nvroot) > 0) {
+			print_vdev_tree(zhp, "logs", nvroot, 0,
+			    VDEV_ALLOC_BIAS_LOG, name_flags);
+		}
+
+		/* Do the same for the caches */
+		if (nvlist_lookup_nvlist_array(poolnvroot, ZPOOL_CONFIG_L2CACHE,
+		    &l2child, &l2children) == 0 && l2children) {
+			hadcache = B_TRUE;
+			(void) printf(gettext("\tcache\n"));
+			for (c = 0; c < l2children; c++) {
+				vname = zpool_vdev_name(g_zfs, NULL,
+				    l2child[c], name_flags);
+				(void) printf("\t  %s\n", vname);
+				free(vname);
+			}
+		}
+		if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
+		    &l2child, &l2children) == 0 && l2children) {
+			if (!hadcache)
+				(void) printf(gettext("\tcache\n"));
+			for (c = 0; c < l2children; c++) {
+				vname = zpool_vdev_name(g_zfs, NULL,
+				    l2child[c], name_flags);
+				(void) printf("\t  %s\n", vname);
+				free(vname);
+			}
+		}
+
+		ret = 0;
+	} else {
+		ret = (zpool_add(zhp, nvroot) != 0);
+	}
+
+	nvlist_free(props);
+	nvlist_free(nvroot);
+	zpool_close(zhp);
+
+	return (ret);
+}
+
+/*
+ * zpool remove [-npsw] <pool> <vdev> ...
+ *
+ * Removes the given vdev from the pool.
+ */
+int
+zpool_do_remove(int argc, char **argv)
+{
+	char *poolname;
+	int i, ret = 0;
+	zpool_handle_t *zhp = NULL;
+	boolean_t stop = B_FALSE;
+	int c;
+	boolean_t noop = B_FALSE;
+	boolean_t parsable = B_FALSE;
+	boolean_t wait = B_FALSE;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "npsw")) != -1) {
+		switch (c) {
+		case 'n':
+			noop = B_TRUE;
+			break;
+		case 'p':
+			parsable = B_TRUE;
+			break;
+		case 's':
+			stop = B_TRUE;
+			break;
+		case 'w':
+			wait = B_TRUE;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* get pool name and check number of arguments */
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name argument\n"));
+		usage(B_FALSE);
+	}
+
+	poolname = argv[0];
+
+	if ((zhp = zpool_open(g_zfs, poolname)) == NULL)
+		return (1);
+
+	if (stop && noop) {
+		(void) fprintf(stderr, gettext("stop request ignored\n"));
+		return (0);
+	}
+
+	if (stop) {
+		if (argc > 1) {
+			(void) fprintf(stderr, gettext("too many arguments\n"));
+			usage(B_FALSE);
+		}
+		if (zpool_vdev_remove_cancel(zhp) != 0)
+			ret = 1;
+		if (wait) {
+			(void) fprintf(stderr, gettext("invalid option "
+			    "combination: -w cannot be used with -s\n"));
+			usage(B_FALSE);
+		}
+	} else {
+		if (argc < 2) {
+			(void) fprintf(stderr, gettext("missing device\n"));
+			usage(B_FALSE);
+		}
+
+		for (i = 1; i < argc; i++) {
+			if (noop) {
+				uint64_t size;
+
+				if (zpool_vdev_indirect_size(zhp, argv[i],
+				    &size) != 0) {
+					ret = 1;
+					break;
+				}
+				if (parsable) {
+					(void) printf("%s %llu\n",
+					    argv[i], (unsigned long long)size);
+				} else {
+					char valstr[32];
+					zfs_nicenum(size, valstr,
+					    sizeof (valstr));
+					(void) printf("Memory that will be "
+					    "used after removing %s: %s\n",
+					    argv[i], valstr);
+				}
+			} else {
+				if (zpool_vdev_remove(zhp, argv[i]) != 0)
+					ret = 1;
+			}
+		}
+
+		if (ret == 0 && wait)
+			ret = zpool_wait(zhp, ZPOOL_WAIT_REMOVE);
+	}
+	zpool_close(zhp);
+
+	return (ret);
+}
+
+/*
+ * zpool labelclear [-f] <vdev>
+ *
+ *	-f	Force clearing the label for the vdevs which are members of
+ *		the exported or foreign pools.
+ *
+ * Verifies that the vdev is not active and zeros out the label information
+ * on the device.
+ */
+int
+zpool_do_labelclear(int argc, char **argv)
+{
+	char vdev[MAXPATHLEN];
+	char *name = NULL;
+	struct stat st;
+	int c, fd = -1, ret = 0;
+	nvlist_t *config;
+	pool_state_t state;
+	boolean_t inuse = B_FALSE;
+	boolean_t force = B_FALSE;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "f")) != -1) {
+		switch (c) {
+		case 'f':
+			force = B_TRUE;
+			break;
+		default:
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* get vdev name */
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing vdev name\n"));
+		usage(B_FALSE);
+	}
+	if (argc > 1) {
+		(void) fprintf(stderr, gettext("too many arguments\n"));
+		usage(B_FALSE);
+	}
+
+	/*
+	 * Check if we were given absolute path and use it as is.
+	 * Otherwise if the provided vdev name doesn't point to a file,
+	 * try prepending expected disk paths and partition numbers.
+	 */
+	(void) strlcpy(vdev, argv[0], sizeof (vdev));
+	if (vdev[0] != '/' && stat(vdev, &st) != 0) {
+		int error;
+
+		error = zfs_resolve_shortname(argv[0], vdev, MAXPATHLEN);
+		if (error == 0 && zfs_dev_is_whole_disk(vdev)) {
+			if (zfs_append_partition(vdev, MAXPATHLEN) == -1)
+				error = ENOENT;
+		}
+
+		if (error || (stat(vdev, &st) != 0)) {
+			(void) fprintf(stderr, gettext(
+			    "failed to find device %s, try specifying absolute "
+			    "path instead\n"), argv[0]);
+			return (1);
+		}
+	}
+
+	if ((fd = open(vdev, O_RDWR)) < 0) {
+		(void) fprintf(stderr, gettext("failed to open %s: %s\n"),
+		    vdev, strerror(errno));
+		return (1);
+	}
+
+	/*
+	 * Flush all dirty pages for the block device.  This should not be
+	 * fatal when the device does not support BLKFLSBUF as would be the
+	 * case for a file vdev.
+	 */
+	if ((zfs_dev_flush(fd) != 0) && (errno != ENOTTY))
+		(void) fprintf(stderr, gettext("failed to invalidate "
+		    "cache for %s: %s\n"), vdev, strerror(errno));
+
+	if (zpool_read_label(fd, &config, NULL) != 0) {
+		(void) fprintf(stderr,
+		    gettext("failed to read label from %s\n"), vdev);
+		ret = 1;
+		goto errout;
+	}
+	nvlist_free(config);
+
+	ret = zpool_in_use(g_zfs, fd, &state, &name, &inuse);
+	if (ret != 0) {
+		(void) fprintf(stderr,
+		    gettext("failed to check state for %s\n"), vdev);
+		ret = 1;
+		goto errout;
+	}
+
+	if (!inuse)
+		goto wipe_label;
+
+	switch (state) {
+	default:
+	case POOL_STATE_ACTIVE:
+	case POOL_STATE_SPARE:
+	case POOL_STATE_L2CACHE:
+		(void) fprintf(stderr, gettext(
+		    "%s is a member (%s) of pool \"%s\"\n"),
+		    vdev, zpool_pool_state_to_name(state), name);
+		ret = 1;
+		goto errout;
+
+	case POOL_STATE_EXPORTED:
+		if (force)
+			break;
+		(void) fprintf(stderr, gettext(
+		    "use '-f' to override the following error:\n"
+		    "%s is a member of exported pool \"%s\"\n"),
+		    vdev, name);
+		ret = 1;
+		goto errout;
+
+	case POOL_STATE_POTENTIALLY_ACTIVE:
+		if (force)
+			break;
+		(void) fprintf(stderr, gettext(
+		    "use '-f' to override the following error:\n"
+		    "%s is a member of potentially active pool \"%s\"\n"),
+		    vdev, name);
+		ret = 1;
+		goto errout;
+
+	case POOL_STATE_DESTROYED:
+		/* inuse should never be set for a destroyed pool */
+		assert(0);
+		break;
+	}
+
+wipe_label:
+	ret = zpool_clear_label(fd);
+	if (ret != 0) {
+		(void) fprintf(stderr,
+		    gettext("failed to clear label for %s\n"), vdev);
+	}
+
+errout:
+	free(name);
+	(void) close(fd);
+
+	return (ret);
+}
+
+/*
+ * zpool create [-fnd] [-o property=value] ...
+ *		[-O file-system-property=value] ...
+ *		[-R root] [-m mountpoint] <pool> <dev> ...
+ *
+ *	-f	Force creation, even if devices appear in use
+ *	-n	Do not create the pool, but display the resulting layout if it
+ *		were to be created.
+ *      -R	Create a pool under an alternate root
+ *      -m	Set default mountpoint for the root dataset.  By default it's
+ *		'/<pool>'
+ *	-o	Set property=value.
+ *	-o	Set feature@feature=enabled|disabled.
+ *	-d	Don't automatically enable all supported pool features
+ *		(individual features can be enabled with -o).
+ *	-O	Set fsproperty=value in the pool's root file system
+ *
+ * Creates the named pool according to the given vdev specification.  The
+ * bulk of the vdev processing is done in make_root_vdev() in zpool_vdev.c.
+ * Once we get the nvlist back from make_root_vdev(), we either print out the
+ * contents (if '-n' was specified), or pass it to libzfs to do the creation.
+ */
+int
+zpool_do_create(int argc, char **argv)
+{
+	boolean_t force = B_FALSE;
+	boolean_t dryrun = B_FALSE;
+	boolean_t enable_all_pool_feat = B_TRUE;
+	int c;
+	nvlist_t *nvroot = NULL;
+	char *poolname;
+	char *tname = NULL;
+	int ret = 1;
+	char *altroot = NULL;
+	char *mountpoint = NULL;
+	nvlist_t *fsprops = NULL;
+	nvlist_t *props = NULL;
+	char *propval;
+
+	/* check options */
+	while ((c = getopt(argc, argv, ":fndR:m:o:O:t:")) != -1) {
+		switch (c) {
+		case 'f':
+			force = B_TRUE;
+			break;
+		case 'n':
+			dryrun = B_TRUE;
+			break;
+		case 'd':
+			enable_all_pool_feat = B_FALSE;
+			break;
+		case 'R':
+			altroot = optarg;
+			if (add_prop_list(zpool_prop_to_name(
+			    ZPOOL_PROP_ALTROOT), optarg, &props, B_TRUE))
+				goto errout;
+			if (add_prop_list_default(zpool_prop_to_name(
+			    ZPOOL_PROP_CACHEFILE), "none", &props, B_TRUE))
+				goto errout;
+			break;
+		case 'm':
+			/* Equivalent to -O mountpoint=optarg */
+			mountpoint = optarg;
+			break;
+		case 'o':
+			if ((propval = strchr(optarg, '=')) == NULL) {
+				(void) fprintf(stderr, gettext("missing "
+				    "'=' for -o option\n"));
+				goto errout;
+			}
+			*propval = '\0';
+			propval++;
+
+			if (add_prop_list(optarg, propval, &props, B_TRUE))
+				goto errout;
+
+			/*
+			 * If the user is creating a pool that doesn't support
+			 * feature flags, don't enable any features.
+			 */
+			if (zpool_name_to_prop(optarg) == ZPOOL_PROP_VERSION) {
+				char *end;
+				u_longlong_t ver;
+
+				ver = strtoull(propval, &end, 10);
+				if (*end == '\0' &&
+				    ver < SPA_VERSION_FEATURES) {
+					enable_all_pool_feat = B_FALSE;
+				}
+			}
+			if (zpool_name_to_prop(optarg) == ZPOOL_PROP_ALTROOT)
+				altroot = propval;
+			break;
+		case 'O':
+			if ((propval = strchr(optarg, '=')) == NULL) {
+				(void) fprintf(stderr, gettext("missing "
+				    "'=' for -O option\n"));
+				goto errout;
+			}
+			*propval = '\0';
+			propval++;
+
+			/*
+			 * Mountpoints are checked and then added later.
+			 * Uniquely among properties, they can be specified
+			 * more than once, to avoid conflict with -m.
+			 */
+			if (0 == strcmp(optarg,
+			    zfs_prop_to_name(ZFS_PROP_MOUNTPOINT))) {
+				mountpoint = propval;
+			} else if (add_prop_list(optarg, propval, &fsprops,
+			    B_FALSE)) {
+				goto errout;
+			}
+			break;
+		case 't':
+			/*
+			 * Sanity check temporary pool name.
+			 */
+			if (strchr(optarg, '/') != NULL) {
+				(void) fprintf(stderr, gettext("cannot create "
+				    "'%s': invalid character '/' in temporary "
+				    "name\n"), optarg);
+				(void) fprintf(stderr, gettext("use 'zfs "
+				    "create' to create a dataset\n"));
+				goto errout;
+			}
+
+			if (add_prop_list(zpool_prop_to_name(
+			    ZPOOL_PROP_TNAME), optarg, &props, B_TRUE))
+				goto errout;
+			if (add_prop_list_default(zpool_prop_to_name(
+			    ZPOOL_PROP_CACHEFILE), "none", &props, B_TRUE))
+				goto errout;
+			tname = optarg;
+			break;
+		case ':':
+			(void) fprintf(stderr, gettext("missing argument for "
+			    "'%c' option\n"), optopt);
+			goto badusage;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			goto badusage;
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* get pool name and check number of arguments */
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name argument\n"));
+		goto badusage;
+	}
+	if (argc < 2) {
+		(void) fprintf(stderr, gettext("missing vdev specification\n"));
+		goto badusage;
+	}
+
+	poolname = argv[0];
+
+	/*
+	 * As a special case, check for use of '/' in the name, and direct the
+	 * user to use 'zfs create' instead.
+	 */
+	if (strchr(poolname, '/') != NULL) {
+		(void) fprintf(stderr, gettext("cannot create '%s': invalid "
+		    "character '/' in pool name\n"), poolname);
+		(void) fprintf(stderr, gettext("use 'zfs create' to "
+		    "create a dataset\n"));
+		goto errout;
+	}
+
+	/* pass off to make_root_vdev for bulk processing */
+	nvroot = make_root_vdev(NULL, props, force, !force, B_FALSE, dryrun,
+	    argc - 1, argv + 1);
+	if (nvroot == NULL)
+		goto errout;
+
+	/* make_root_vdev() allows 0 toplevel children if there are spares */
+	if (!zfs_allocatable_devs(nvroot)) {
+		(void) fprintf(stderr, gettext("invalid vdev "
+		    "specification: at least one toplevel vdev must be "
+		    "specified\n"));
+		goto errout;
+	}
+
+	if (altroot != NULL && altroot[0] != '/') {
+		(void) fprintf(stderr, gettext("invalid alternate root '%s': "
+		    "must be an absolute path\n"), altroot);
+		goto errout;
+	}
+
+	/*
+	 * Check the validity of the mountpoint and direct the user to use the
+	 * '-m' mountpoint option if it looks like its in use.
+	 */
+	if (mountpoint == NULL ||
+	    (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) != 0 &&
+	    strcmp(mountpoint, ZFS_MOUNTPOINT_NONE) != 0)) {
+		char buf[MAXPATHLEN];
+		DIR *dirp;
+
+		if (mountpoint && mountpoint[0] != '/') {
+			(void) fprintf(stderr, gettext("invalid mountpoint "
+			    "'%s': must be an absolute path, 'legacy', or "
+			    "'none'\n"), mountpoint);
+			goto errout;
+		}
+
+		if (mountpoint == NULL) {
+			if (altroot != NULL)
+				(void) snprintf(buf, sizeof (buf), "%s/%s",
+				    altroot, poolname);
+			else
+				(void) snprintf(buf, sizeof (buf), "/%s",
+				    poolname);
+		} else {
+			if (altroot != NULL)
+				(void) snprintf(buf, sizeof (buf), "%s%s",
+				    altroot, mountpoint);
+			else
+				(void) snprintf(buf, sizeof (buf), "%s",
+				    mountpoint);
+		}
+
+		if ((dirp = opendir(buf)) == NULL && errno != ENOENT) {
+			(void) fprintf(stderr, gettext("mountpoint '%s' : "
+			    "%s\n"), buf, strerror(errno));
+			(void) fprintf(stderr, gettext("use '-m' "
+			    "option to provide a different default\n"));
+			goto errout;
+		} else if (dirp) {
+			int count = 0;
+
+			while (count < 3 && readdir(dirp) != NULL)
+				count++;
+			(void) closedir(dirp);
+
+			if (count > 2) {
+				(void) fprintf(stderr, gettext("mountpoint "
+				    "'%s' exists and is not empty\n"), buf);
+				(void) fprintf(stderr, gettext("use '-m' "
+				    "option to provide a "
+				    "different default\n"));
+				goto errout;
+			}
+		}
+	}
+
+	/*
+	 * Now that the mountpoint's validity has been checked, ensure that
+	 * the property is set appropriately prior to creating the pool.
+	 */
+	if (mountpoint != NULL) {
+		ret = add_prop_list(zfs_prop_to_name(ZFS_PROP_MOUNTPOINT),
+		    mountpoint, &fsprops, B_FALSE);
+		if (ret != 0)
+			goto errout;
+	}
+
+	ret = 1;
+	if (dryrun) {
+		/*
+		 * For a dry run invocation, print out a basic message and run
+		 * through all the vdevs in the list and print out in an
+		 * appropriate hierarchy.
+		 */
+		(void) printf(gettext("would create '%s' with the "
+		    "following layout:\n\n"), poolname);
+
+		print_vdev_tree(NULL, poolname, nvroot, 0, "", 0);
+		print_vdev_tree(NULL, "dedup", nvroot, 0,
+		    VDEV_ALLOC_BIAS_DEDUP, 0);
+		print_vdev_tree(NULL, "special", nvroot, 0,
+		    VDEV_ALLOC_BIAS_SPECIAL, 0);
+		print_vdev_tree(NULL, "logs", nvroot, 0,
+		    VDEV_ALLOC_BIAS_LOG, 0);
+
+		ret = 0;
+	} else {
+		/*
+		 * Hand off to libzfs.
+		 */
+		spa_feature_t i;
+		for (i = 0; i < SPA_FEATURES; i++) {
+			char propname[MAXPATHLEN];
+			char *propval;
+			zfeature_info_t *feat = &spa_feature_table[i];
+
+			(void) snprintf(propname, sizeof (propname),
+			    "feature@%s", feat->fi_uname);
+
+			/*
+			 * Only features contained in props will be enabled:
+			 * remove from the nvlist every ZFS_FEATURE_DISABLED
+			 * value and add every missing ZFS_FEATURE_ENABLED if
+			 * enable_all_pool_feat is set.
+			 */
+			if (!nvlist_lookup_string(props, propname, &propval)) {
+				if (strcmp(propval, ZFS_FEATURE_DISABLED) == 0)
+					(void) nvlist_remove_all(props,
+					    propname);
+			} else if (enable_all_pool_feat) {
+				ret = add_prop_list(propname,
+				    ZFS_FEATURE_ENABLED, &props, B_TRUE);
+				if (ret != 0)
+					goto errout;
+			}
+		}
+
+		ret = 1;
+		if (zpool_create(g_zfs, poolname,
+		    nvroot, props, fsprops) == 0) {
+			zfs_handle_t *pool = zfs_open(g_zfs,
+			    tname ? tname : poolname, ZFS_TYPE_FILESYSTEM);
+			if (pool != NULL) {
+				if (zfs_mount(pool, NULL, 0) == 0) {
+					ret = zfs_shareall(pool);
+					zfs_commit_all_shares();
+				}
+				zfs_close(pool);
+			}
+		} else if (libzfs_errno(g_zfs) == EZFS_INVALIDNAME) {
+			(void) fprintf(stderr, gettext("pool name may have "
+			    "been omitted\n"));
+		}
+	}
+
+errout:
+	nvlist_free(nvroot);
+	nvlist_free(fsprops);
+	nvlist_free(props);
+	return (ret);
+badusage:
+	nvlist_free(fsprops);
+	nvlist_free(props);
+	usage(B_FALSE);
+	return (2);
+}
+
+/*
+ * zpool destroy <pool>
+ *
+ * 	-f	Forcefully unmount any datasets
+ *
+ * Destroy the given pool.  Automatically unmounts any datasets in the pool.
+ */
+int
+zpool_do_destroy(int argc, char **argv)
+{
+	boolean_t force = B_FALSE;
+	int c;
+	char *pool;
+	zpool_handle_t *zhp;
+	int ret;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "f")) != -1) {
+		switch (c) {
+		case 'f':
+			force = B_TRUE;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* check arguments */
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool argument\n"));
+		usage(B_FALSE);
+	}
+	if (argc > 1) {
+		(void) fprintf(stderr, gettext("too many arguments\n"));
+		usage(B_FALSE);
+	}
+
+	pool = argv[0];
+
+	if ((zhp = zpool_open_canfail(g_zfs, pool)) == NULL) {
+		/*
+		 * As a special case, check for use of '/' in the name, and
+		 * direct the user to use 'zfs destroy' instead.
+		 */
+		if (strchr(pool, '/') != NULL)
+			(void) fprintf(stderr, gettext("use 'zfs destroy' to "
+			    "destroy a dataset\n"));
+		return (1);
+	}
+
+	if (zpool_disable_datasets(zhp, force) != 0) {
+		(void) fprintf(stderr, gettext("could not destroy '%s': "
+		    "could not unmount datasets\n"), zpool_get_name(zhp));
+		zpool_close(zhp);
+		return (1);
+	}
+
+	/* The history must be logged as part of the export */
+	log_history = B_FALSE;
+
+	ret = (zpool_destroy(zhp, history_str) != 0);
+
+	zpool_close(zhp);
+
+	return (ret);
+}
+
+typedef struct export_cbdata {
+	boolean_t force;
+	boolean_t hardforce;
+} export_cbdata_t;
+
+/*
+ * Export one pool
+ */
+static int
+zpool_export_one(zpool_handle_t *zhp, void *data)
+{
+	export_cbdata_t *cb = data;
+
+	if (zpool_disable_datasets(zhp, cb->force) != 0)
+		return (1);
+
+	/* The history must be logged as part of the export */
+	log_history = B_FALSE;
+
+	if (cb->hardforce) {
+		if (zpool_export_force(zhp, history_str) != 0)
+			return (1);
+	} else if (zpool_export(zhp, cb->force, history_str) != 0) {
+		return (1);
+	}
+
+	return (0);
+}
+
+/*
+ * zpool export [-f] <pool> ...
+ *
+ *	-a	Export all pools
+ *	-f	Forcefully unmount datasets
+ *
+ * Export the given pools.  By default, the command will attempt to cleanly
+ * unmount any active datasets within the pool.  If the '-f' flag is specified,
+ * then the datasets will be forcefully unmounted.
+ */
+int
+zpool_do_export(int argc, char **argv)
+{
+	export_cbdata_t cb;
+	boolean_t do_all = B_FALSE;
+	boolean_t force = B_FALSE;
+	boolean_t hardforce = B_FALSE;
+	int c, ret;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "afF")) != -1) {
+		switch (c) {
+		case 'a':
+			do_all = B_TRUE;
+			break;
+		case 'f':
+			force = B_TRUE;
+			break;
+		case 'F':
+			hardforce = B_TRUE;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	cb.force = force;
+	cb.hardforce = hardforce;
+	argc -= optind;
+	argv += optind;
+
+	if (do_all) {
+		if (argc != 0) {
+			(void) fprintf(stderr, gettext("too many arguments\n"));
+			usage(B_FALSE);
+		}
+
+		return (for_each_pool(argc, argv, B_TRUE, NULL,
+		    zpool_export_one, &cb));
+	}
+
+	/* check arguments */
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool argument\n"));
+		usage(B_FALSE);
+	}
+
+	ret = for_each_pool(argc, argv, B_TRUE, NULL, zpool_export_one, &cb);
+
+	return (ret);
+}
+
+/*
+ * Given a vdev configuration, determine the maximum width needed for the device
+ * name column.
+ */
+static int
+max_width(zpool_handle_t *zhp, nvlist_t *nv, int depth, int max,
+    int name_flags)
+{
+	char *name;
+	nvlist_t **child;
+	uint_t c, children;
+	int ret;
+
+	name = zpool_vdev_name(g_zfs, zhp, nv, name_flags);
+	if (strlen(name) + depth > max)
+		max = strlen(name) + depth;
+
+	free(name);
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES,
+	    &child, &children) == 0) {
+		for (c = 0; c < children; c++)
+			if ((ret = max_width(zhp, child[c], depth + 2,
+			    max, name_flags)) > max)
+				max = ret;
+	}
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
+	    &child, &children) == 0) {
+		for (c = 0; c < children; c++)
+			if ((ret = max_width(zhp, child[c], depth + 2,
+			    max, name_flags)) > max)
+				max = ret;
+	}
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) == 0) {
+		for (c = 0; c < children; c++)
+			if ((ret = max_width(zhp, child[c], depth + 2,
+			    max, name_flags)) > max)
+				max = ret;
+	}
+
+	return (max);
+}
+
+typedef struct spare_cbdata {
+	uint64_t	cb_guid;
+	zpool_handle_t	*cb_zhp;
+} spare_cbdata_t;
+
+static boolean_t
+find_vdev(nvlist_t *nv, uint64_t search)
+{
+	uint64_t guid;
+	nvlist_t **child;
+	uint_t c, children;
+
+	if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) == 0 &&
+	    search == guid)
+		return (B_TRUE);
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) == 0) {
+		for (c = 0; c < children; c++)
+			if (find_vdev(child[c], search))
+				return (B_TRUE);
+	}
+
+	return (B_FALSE);
+}
+
+static int
+find_spare(zpool_handle_t *zhp, void *data)
+{
+	spare_cbdata_t *cbp = data;
+	nvlist_t *config, *nvroot;
+
+	config = zpool_get_config(zhp, NULL);
+	verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+	    &nvroot) == 0);
+
+	if (find_vdev(nvroot, cbp->cb_guid)) {
+		cbp->cb_zhp = zhp;
+		return (1);
+	}
+
+	zpool_close(zhp);
+	return (0);
+}
+
+typedef struct status_cbdata {
+	int		cb_count;
+	int		cb_name_flags;
+	int		cb_namewidth;
+	boolean_t	cb_allpools;
+	boolean_t	cb_verbose;
+	boolean_t	cb_literal;
+	boolean_t	cb_explain;
+	boolean_t	cb_first;
+	boolean_t	cb_dedup_stats;
+	boolean_t	cb_print_status;
+	boolean_t	cb_print_slow_ios;
+	boolean_t	cb_print_vdev_init;
+	boolean_t	cb_print_vdev_trim;
+	vdev_cmd_data_list_t	*vcdl;
+} status_cbdata_t;
+
+/* Return 1 if string is NULL, empty, or whitespace; return 0 otherwise. */
+static int
+is_blank_str(char *str)
+{
+	while (str != NULL && *str != '\0') {
+		if (!isblank(*str))
+			return (0);
+		str++;
+	}
+	return (1);
+}
+
+/* Print command output lines for specific vdev in a specific pool */
+static void
+zpool_print_cmd(vdev_cmd_data_list_t *vcdl, const char *pool, char *path)
+{
+	vdev_cmd_data_t *data;
+	int i, j;
+	char *val;
+
+	for (i = 0; i < vcdl->count; i++) {
+		if ((strcmp(vcdl->data[i].path, path) != 0) ||
+		    (strcmp(vcdl->data[i].pool, pool) != 0)) {
+			/* Not the vdev we're looking for */
+			continue;
+		}
+
+		data = &vcdl->data[i];
+		/* Print out all the output values for this vdev */
+		for (j = 0; j < vcdl->uniq_cols_cnt; j++) {
+			val = NULL;
+			/* Does this vdev have values for this column? */
+			for (int k = 0; k < data->cols_cnt; k++) {
+				if (strcmp(data->cols[k],
+				    vcdl->uniq_cols[j]) == 0) {
+					/* yes it does, record the value */
+					val = data->lines[k];
+					break;
+				}
+			}
+			/*
+			 * Mark empty values with dashes to make output
+			 * awk-able.
+			 */
+			if (is_blank_str(val))
+				val = "-";
+
+			printf("%*s", vcdl->uniq_cols_width[j], val);
+			if (j < vcdl->uniq_cols_cnt - 1)
+				printf("  ");
+		}
+
+		/* Print out any values that aren't in a column at the end */
+		for (j = data->cols_cnt; j < data->lines_cnt; j++) {
+			/* Did we have any columns?  If so print a spacer. */
+			if (vcdl->uniq_cols_cnt > 0)
+				printf("  ");
+
+			val = data->lines[j];
+			printf("%s", val ? val : "");
+		}
+		break;
+	}
+}
+
+/*
+ * Print vdev initialization status for leaves
+ */
+static void
+print_status_initialize(vdev_stat_t *vs, boolean_t verbose)
+{
+	if (verbose) {
+		if ((vs->vs_initialize_state == VDEV_INITIALIZE_ACTIVE ||
+		    vs->vs_initialize_state == VDEV_INITIALIZE_SUSPENDED ||
+		    vs->vs_initialize_state == VDEV_INITIALIZE_COMPLETE) &&
+		    !vs->vs_scan_removing) {
+			char zbuf[1024];
+			char tbuf[256];
+			struct tm zaction_ts;
+
+			time_t t = vs->vs_initialize_action_time;
+			int initialize_pct = 100;
+			if (vs->vs_initialize_state !=
+			    VDEV_INITIALIZE_COMPLETE) {
+				initialize_pct = (vs->vs_initialize_bytes_done *
+				    100 / (vs->vs_initialize_bytes_est + 1));
+			}
+
+			(void) localtime_r(&t, &zaction_ts);
+			(void) strftime(tbuf, sizeof (tbuf), "%c", &zaction_ts);
+
+			switch (vs->vs_initialize_state) {
+			case VDEV_INITIALIZE_SUSPENDED:
+				(void) snprintf(zbuf, sizeof (zbuf), ", %s %s",
+				    gettext("suspended, started at"), tbuf);
+				break;
+			case VDEV_INITIALIZE_ACTIVE:
+				(void) snprintf(zbuf, sizeof (zbuf), ", %s %s",
+				    gettext("started at"), tbuf);
+				break;
+			case VDEV_INITIALIZE_COMPLETE:
+				(void) snprintf(zbuf, sizeof (zbuf), ", %s %s",
+				    gettext("completed at"), tbuf);
+				break;
+			}
+
+			(void) printf(gettext("  (%d%% initialized%s)"),
+			    initialize_pct, zbuf);
+		} else {
+			(void) printf(gettext("  (uninitialized)"));
+		}
+	} else if (vs->vs_initialize_state == VDEV_INITIALIZE_ACTIVE) {
+		(void) printf(gettext("  (initializing)"));
+	}
+}
+
+/*
+ * Print vdev TRIM status for leaves
+ */
+static void
+print_status_trim(vdev_stat_t *vs, boolean_t verbose)
+{
+	if (verbose) {
+		if ((vs->vs_trim_state == VDEV_TRIM_ACTIVE ||
+		    vs->vs_trim_state == VDEV_TRIM_SUSPENDED ||
+		    vs->vs_trim_state == VDEV_TRIM_COMPLETE) &&
+		    !vs->vs_scan_removing) {
+			char zbuf[1024];
+			char tbuf[256];
+			struct tm zaction_ts;
+
+			time_t t = vs->vs_trim_action_time;
+			int trim_pct = 100;
+			if (vs->vs_trim_state != VDEV_TRIM_COMPLETE) {
+				trim_pct = (vs->vs_trim_bytes_done *
+				    100 / (vs->vs_trim_bytes_est + 1));
+			}
+
+			(void) localtime_r(&t, &zaction_ts);
+			(void) strftime(tbuf, sizeof (tbuf), "%c", &zaction_ts);
+
+			switch (vs->vs_trim_state) {
+			case VDEV_TRIM_SUSPENDED:
+				(void) snprintf(zbuf, sizeof (zbuf), ", %s %s",
+				    gettext("suspended, started at"), tbuf);
+				break;
+			case VDEV_TRIM_ACTIVE:
+				(void) snprintf(zbuf, sizeof (zbuf), ", %s %s",
+				    gettext("started at"), tbuf);
+				break;
+			case VDEV_TRIM_COMPLETE:
+				(void) snprintf(zbuf, sizeof (zbuf), ", %s %s",
+				    gettext("completed at"), tbuf);
+				break;
+			}
+
+			(void) printf(gettext("  (%d%% trimmed%s)"),
+			    trim_pct, zbuf);
+		} else if (vs->vs_trim_notsup) {
+			(void) printf(gettext("  (trim unsupported)"));
+		} else {
+			(void) printf(gettext("  (untrimmed)"));
+		}
+	} else if (vs->vs_trim_state == VDEV_TRIM_ACTIVE) {
+		(void) printf(gettext("  (trimming)"));
+	}
+}
+
+/*
+ * Return the color associated with a health string.  This includes returning
+ * NULL for no color change.
+ */
+static char *
+health_str_to_color(const char *health)
+{
+	if (strcmp(health, gettext("FAULTED")) == 0 ||
+	    strcmp(health, gettext("SUSPENDED")) == 0 ||
+	    strcmp(health, gettext("UNAVAIL")) == 0) {
+		return (ANSI_RED);
+	}
+
+	if (strcmp(health, gettext("OFFLINE")) == 0 ||
+	    strcmp(health, gettext("DEGRADED")) == 0 ||
+	    strcmp(health, gettext("REMOVED")) == 0) {
+		return (ANSI_YELLOW);
+	}
+
+	return (NULL);
+}
+
+/*
+ * Print out configuration state as requested by status_callback.
+ */
+static void
+print_status_config(zpool_handle_t *zhp, status_cbdata_t *cb, const char *name,
+    nvlist_t *nv, int depth, boolean_t isspare, vdev_rebuild_stat_t *vrs)
+{
+	nvlist_t **child, *root;
+	uint_t c, i, vsc, children;
+	pool_scan_stat_t *ps = NULL;
+	vdev_stat_t *vs;
+	char rbuf[6], wbuf[6], cbuf[6];
+	char *vname;
+	uint64_t notpresent;
+	spare_cbdata_t spare_cb;
+	const char *state;
+	char *type;
+	char *path = NULL;
+	char *rcolor = NULL, *wcolor = NULL, *ccolor = NULL;
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0)
+		children = 0;
+
+	verify(nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS,
+	    (uint64_t **)&vs, &vsc) == 0);
+
+	verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);
+
+	if (strcmp(type, VDEV_TYPE_INDIRECT) == 0)
+		return;
+
+	state = zpool_state_to_name(vs->vs_state, vs->vs_aux);
+
+	if (isspare) {
+		/*
+		 * For hot spares, we use the terms 'INUSE' and 'AVAILABLE' for
+		 * online drives.
+		 */
+		if (vs->vs_aux == VDEV_AUX_SPARED)
+			state = gettext("INUSE");
+		else if (vs->vs_state == VDEV_STATE_HEALTHY)
+			state = gettext("AVAIL");
+	}
+
+	printf_color(health_str_to_color(state),
+	    "\t%*s%-*s  %-8s", depth, "", cb->cb_namewidth - depth,
+	    name, state);
+
+	if (!isspare) {
+		if (vs->vs_read_errors)
+			rcolor = ANSI_RED;
+
+		if (vs->vs_write_errors)
+			wcolor = ANSI_RED;
+
+		if (vs->vs_checksum_errors)
+			ccolor = ANSI_RED;
+
+		if (cb->cb_literal) {
+			printf(" ");
+			printf_color(rcolor, "%5llu",
+			    (u_longlong_t)vs->vs_read_errors);
+			printf(" ");
+			printf_color(wcolor, "%5llu",
+			    (u_longlong_t)vs->vs_write_errors);
+			printf(" ");
+			printf_color(ccolor, "%5llu",
+			    (u_longlong_t)vs->vs_checksum_errors);
+		} else {
+			zfs_nicenum(vs->vs_read_errors, rbuf, sizeof (rbuf));
+			zfs_nicenum(vs->vs_write_errors, wbuf, sizeof (wbuf));
+			zfs_nicenum(vs->vs_checksum_errors, cbuf,
+			    sizeof (cbuf));
+			printf(" ");
+			printf_color(rcolor, "%5s", rbuf);
+			printf(" ");
+			printf_color(wcolor, "%5s", wbuf);
+			printf(" ");
+			printf_color(ccolor, "%5s", cbuf);
+		}
+		if (cb->cb_print_slow_ios) {
+			if (children == 0)  {
+				/* Only leafs vdevs have slow IOs */
+				zfs_nicenum(vs->vs_slow_ios, rbuf,
+				    sizeof (rbuf));
+			} else {
+				snprintf(rbuf, sizeof (rbuf), "-");
+			}
+
+			if (cb->cb_literal)
+				printf(" %5llu", (u_longlong_t)vs->vs_slow_ios);
+			else
+				printf(" %5s", rbuf);
+		}
+	}
+
+	if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT,
+	    &notpresent) == 0) {
+		verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) == 0);
+		(void) printf("  %s %s", gettext("was"), path);
+	} else if (vs->vs_aux != 0) {
+		(void) printf("  ");
+		color_start(ANSI_RED);
+		switch (vs->vs_aux) {
+		case VDEV_AUX_OPEN_FAILED:
+			(void) printf(gettext("cannot open"));
+			break;
+
+		case VDEV_AUX_BAD_GUID_SUM:
+			(void) printf(gettext("missing device"));
+			break;
+
+		case VDEV_AUX_NO_REPLICAS:
+			(void) printf(gettext("insufficient replicas"));
+			break;
+
+		case VDEV_AUX_VERSION_NEWER:
+			(void) printf(gettext("newer version"));
+			break;
+
+		case VDEV_AUX_UNSUP_FEAT:
+			(void) printf(gettext("unsupported feature(s)"));
+			break;
+
+		case VDEV_AUX_ASHIFT_TOO_BIG:
+			(void) printf(gettext("unsupported minimum blocksize"));
+			break;
+
+		case VDEV_AUX_SPARED:
+			verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID,
+			    &spare_cb.cb_guid) == 0);
+			if (zpool_iter(g_zfs, find_spare, &spare_cb) == 1) {
+				if (strcmp(zpool_get_name(spare_cb.cb_zhp),
+				    zpool_get_name(zhp)) == 0)
+					(void) printf(gettext("currently in "
+					    "use"));
+				else
+					(void) printf(gettext("in use by "
+					    "pool '%s'"),
+					    zpool_get_name(spare_cb.cb_zhp));
+				zpool_close(spare_cb.cb_zhp);
+			} else {
+				(void) printf(gettext("currently in use"));
+			}
+			break;
+
+		case VDEV_AUX_ERR_EXCEEDED:
+			(void) printf(gettext("too many errors"));
+			break;
+
+		case VDEV_AUX_IO_FAILURE:
+			(void) printf(gettext("experienced I/O failures"));
+			break;
+
+		case VDEV_AUX_BAD_LOG:
+			(void) printf(gettext("bad intent log"));
+			break;
+
+		case VDEV_AUX_EXTERNAL:
+			(void) printf(gettext("external device fault"));
+			break;
+
+		case VDEV_AUX_SPLIT_POOL:
+			(void) printf(gettext("split into new pool"));
+			break;
+
+		case VDEV_AUX_ACTIVE:
+			(void) printf(gettext("currently in use"));
+			break;
+
+		case VDEV_AUX_CHILDREN_OFFLINE:
+			(void) printf(gettext("all children offline"));
+			break;
+
+		default:
+			(void) printf(gettext("corrupted data"));
+			break;
+		}
+		color_end();
+	}
+
+	/* The root vdev has the scrub/resilver stats */
+	root = fnvlist_lookup_nvlist(zpool_get_config(zhp, NULL),
+	    ZPOOL_CONFIG_VDEV_TREE);
+	(void) nvlist_lookup_uint64_array(root, ZPOOL_CONFIG_SCAN_STATS,
+	    (uint64_t **)&ps, &c);
+
+	if (ps != NULL && ps->pss_state == DSS_SCANNING && children == 0) {
+		if (vs->vs_scan_processed != 0) {
+			(void) printf(gettext("  (%s)"),
+			    (ps->pss_func == POOL_SCAN_RESILVER) ?
+			    "resilvering" : "repairing");
+		} else if (vs->vs_resilver_deferred) {
+			(void) printf(gettext("  (awaiting resilver)"));
+		}
+	}
+
+	/* The top-level vdevs have the rebuild stats */
+	if (vrs != NULL && vrs->vrs_state == VDEV_REBUILD_ACTIVE &&
+	    children == 0) {
+		if (vs->vs_rebuild_processed != 0) {
+			(void) printf(gettext("  (resilvering)"));
+		}
+	}
+
+	if (cb->vcdl != NULL) {
+		if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) == 0) {
+			printf("  ");
+			zpool_print_cmd(cb->vcdl, zpool_get_name(zhp), path);
+		}
+	}
+
+	/* Display vdev initialization and trim status for leaves */
+	if (children == 0) {
+		print_status_initialize(vs, cb->cb_print_vdev_init);
+		print_status_trim(vs, cb->cb_print_vdev_trim);
+	}
+
+	(void) printf("\n");
+
+	for (c = 0; c < children; c++) {
+		uint64_t islog = B_FALSE, ishole = B_FALSE;
+
+		/* Don't print logs or holes here */
+		(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
+		    &islog);
+		(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE,
+		    &ishole);
+		if (islog || ishole)
+			continue;
+		/* Only print normal classes here */
+		if (nvlist_exists(child[c], ZPOOL_CONFIG_ALLOCATION_BIAS))
+			continue;
+
+		/* Provide vdev_rebuild_stats to children if available */
+		if (vrs == NULL) {
+			(void) nvlist_lookup_uint64_array(nv,
+			    ZPOOL_CONFIG_REBUILD_STATS,
+			    (uint64_t **)&vrs, &i);
+		}
+
+		vname = zpool_vdev_name(g_zfs, zhp, child[c],
+		    cb->cb_name_flags | VDEV_NAME_TYPE_ID);
+		print_status_config(zhp, cb, vname, child[c], depth + 2,
+		    isspare, vrs);
+		free(vname);
+	}
+}
+
+/*
+ * Print the configuration of an exported pool.  Iterate over all vdevs in the
+ * pool, printing out the name and status for each one.
+ */
+static void
+print_import_config(status_cbdata_t *cb, const char *name, nvlist_t *nv,
+    int depth)
+{
+	nvlist_t **child;
+	uint_t c, children;
+	vdev_stat_t *vs;
+	char *type, *vname;
+
+	verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);
+	if (strcmp(type, VDEV_TYPE_MISSING) == 0 ||
+	    strcmp(type, VDEV_TYPE_HOLE) == 0)
+		return;
+
+	verify(nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS,
+	    (uint64_t **)&vs, &c) == 0);
+
+	(void) printf("\t%*s%-*s", depth, "", cb->cb_namewidth - depth, name);
+	(void) printf("  %s", zpool_state_to_name(vs->vs_state, vs->vs_aux));
+
+	if (vs->vs_aux != 0) {
+		(void) printf("  ");
+
+		switch (vs->vs_aux) {
+		case VDEV_AUX_OPEN_FAILED:
+			(void) printf(gettext("cannot open"));
+			break;
+
+		case VDEV_AUX_BAD_GUID_SUM:
+			(void) printf(gettext("missing device"));
+			break;
+
+		case VDEV_AUX_NO_REPLICAS:
+			(void) printf(gettext("insufficient replicas"));
+			break;
+
+		case VDEV_AUX_VERSION_NEWER:
+			(void) printf(gettext("newer version"));
+			break;
+
+		case VDEV_AUX_UNSUP_FEAT:
+			(void) printf(gettext("unsupported feature(s)"));
+			break;
+
+		case VDEV_AUX_ERR_EXCEEDED:
+			(void) printf(gettext("too many errors"));
+			break;
+
+		case VDEV_AUX_ACTIVE:
+			(void) printf(gettext("currently in use"));
+			break;
+
+		case VDEV_AUX_CHILDREN_OFFLINE:
+			(void) printf(gettext("all children offline"));
+			break;
+
+		default:
+			(void) printf(gettext("corrupted data"));
+			break;
+		}
+	}
+	(void) printf("\n");
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0)
+		return;
+
+	for (c = 0; c < children; c++) {
+		uint64_t is_log = B_FALSE;
+
+		(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
+		    &is_log);
+		if (is_log)
+			continue;
+		if (nvlist_exists(child[c], ZPOOL_CONFIG_ALLOCATION_BIAS))
+			continue;
+
+		vname = zpool_vdev_name(g_zfs, NULL, child[c],
+		    cb->cb_name_flags | VDEV_NAME_TYPE_ID);
+		print_import_config(cb, vname, child[c], depth + 2);
+		free(vname);
+	}
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
+	    &child, &children) == 0) {
+		(void) printf(gettext("\tcache\n"));
+		for (c = 0; c < children; c++) {
+			vname = zpool_vdev_name(g_zfs, NULL, child[c],
+			    cb->cb_name_flags);
+			(void) printf("\t  %s\n", vname);
+			free(vname);
+		}
+	}
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES,
+	    &child, &children) == 0) {
+		(void) printf(gettext("\tspares\n"));
+		for (c = 0; c < children; c++) {
+			vname = zpool_vdev_name(g_zfs, NULL, child[c],
+			    cb->cb_name_flags);
+			(void) printf("\t  %s\n", vname);
+			free(vname);
+		}
+	}
+}
+
+/*
+ * Print specialized class vdevs.
+ *
+ * These are recorded as top level vdevs in the main pool child array
+ * but with "is_log" set to 1 or an "alloc_bias" string. We use either
+ * print_status_config() or print_import_config() to print the top level
+ * class vdevs then any of their children (eg mirrored slogs) are printed
+ * recursively - which works because only the top level vdev is marked.
+ */
+static void
+print_class_vdevs(zpool_handle_t *zhp, status_cbdata_t *cb, nvlist_t *nv,
+    const char *class)
+{
+	uint_t c, children;
+	nvlist_t **child;
+	boolean_t printed = B_FALSE;
+
+	assert(zhp != NULL || !cb->cb_verbose);
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, &child,
+	    &children) != 0)
+		return;
+
+	for (c = 0; c < children; c++) {
+		uint64_t is_log = B_FALSE;
+		char *bias = NULL;
+		char *type = NULL;
+
+		(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
+		    &is_log);
+
+		if (is_log) {
+			bias = VDEV_ALLOC_CLASS_LOGS;
+		} else {
+			(void) nvlist_lookup_string(child[c],
+			    ZPOOL_CONFIG_ALLOCATION_BIAS, &bias);
+			(void) nvlist_lookup_string(child[c],
+			    ZPOOL_CONFIG_TYPE, &type);
+		}
+
+		if (bias == NULL || strcmp(bias, class) != 0)
+			continue;
+		if (!is_log && strcmp(type, VDEV_TYPE_INDIRECT) == 0)
+			continue;
+
+		if (!printed) {
+			(void) printf("\t%s\t\n", gettext(class));
+			printed = B_TRUE;
+		}
+
+		char *name = zpool_vdev_name(g_zfs, zhp, child[c],
+		    cb->cb_name_flags | VDEV_NAME_TYPE_ID);
+		if (cb->cb_print_status)
+			print_status_config(zhp, cb, name, child[c], 2,
+			    B_FALSE, NULL);
+		else
+			print_import_config(cb, name, child[c], 2);
+		free(name);
+	}
+}
+
+/*
+ * Display the status for the given pool.
+ */
+static void
+show_import(nvlist_t *config)
+{
+	uint64_t pool_state;
+	vdev_stat_t *vs;
+	char *name;
+	uint64_t guid;
+	uint64_t hostid = 0;
+	char *msgid;
+	char *hostname = "unknown";
+	nvlist_t *nvroot, *nvinfo;
+	zpool_status_t reason;
+	zpool_errata_t errata;
+	const char *health;
+	uint_t vsc;
+	char *comment;
+	status_cbdata_t cb = { 0 };
+
+	verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
+	    &name) == 0);
+	verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
+	    &guid) == 0);
+	verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE,
+	    &pool_state) == 0);
+	verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+	    &nvroot) == 0);
+
+	verify(nvlist_lookup_uint64_array(nvroot, ZPOOL_CONFIG_VDEV_STATS,
+	    (uint64_t **)&vs, &vsc) == 0);
+	health = zpool_state_to_name(vs->vs_state, vs->vs_aux);
+
+	reason = zpool_import_status(config, &msgid, &errata);
+
+	(void) printf(gettext("   pool: %s\n"), name);
+	(void) printf(gettext("     id: %llu\n"), (u_longlong_t)guid);
+	(void) printf(gettext("  state: %s"), health);
+	if (pool_state == POOL_STATE_DESTROYED)
+		(void) printf(gettext(" (DESTROYED)"));
+	(void) printf("\n");
+
+	switch (reason) {
+	case ZPOOL_STATUS_MISSING_DEV_R:
+	case ZPOOL_STATUS_MISSING_DEV_NR:
+	case ZPOOL_STATUS_BAD_GUID_SUM:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices are "
+		    "missing from the system.\n"));
+		break;
+
+	case ZPOOL_STATUS_CORRUPT_LABEL_R:
+	case ZPOOL_STATUS_CORRUPT_LABEL_NR:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices contains"
+		    " corrupted data.\n"));
+		break;
+
+	case ZPOOL_STATUS_CORRUPT_DATA:
+		(void) printf(
+		    gettext(" status: The pool data is corrupted.\n"));
+		break;
+
+	case ZPOOL_STATUS_OFFLINE_DEV:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices "
+		    "are offlined.\n"));
+		break;
+
+	case ZPOOL_STATUS_CORRUPT_POOL:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool metadata is "
+		    "corrupted.\n"));
+		break;
+
+	case ZPOOL_STATUS_VERSION_OLDER:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool is formatted using "
+		    "a legacy on-disk version.\n"));
+		break;
+
+	case ZPOOL_STATUS_VERSION_NEWER:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool is formatted using "
+		    "an incompatible version.\n"));
+		break;
+
+	case ZPOOL_STATUS_FEAT_DISABLED:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("Some supported features are "
+		    "not enabled on the pool.\n"));
+		break;
+
+	case ZPOOL_STATUS_UNSUP_FEAT_READ:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool uses the following "
+		    "feature(s) not supported on this system:\n"));
+		color_start(ANSI_YELLOW);
+		zpool_print_unsup_feat(config);
+		color_end();
+		break;
+
+	case ZPOOL_STATUS_UNSUP_FEAT_WRITE:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool can only be "
+		    "accessed in read-only mode on this system. It\n\tcannot be"
+		    " accessed in read-write mode because it uses the "
+		    "following\n\tfeature(s) not supported on this system:\n"));
+		color_start(ANSI_YELLOW);
+		zpool_print_unsup_feat(config);
+		color_end();
+		break;
+
+	case ZPOOL_STATUS_HOSTID_ACTIVE:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool is currently "
+		    "imported by another system.\n"));
+		break;
+
+	case ZPOOL_STATUS_HOSTID_REQUIRED:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool has the "
+		    "multihost property on.  It cannot\n\tbe safely imported "
+		    "when the system hostid is not set.\n"));
+		break;
+
+	case ZPOOL_STATUS_HOSTID_MISMATCH:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool was last accessed "
+		    "by another system.\n"));
+		break;
+
+	case ZPOOL_STATUS_FAULTED_DEV_R:
+	case ZPOOL_STATUS_FAULTED_DEV_NR:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices are "
+		    "faulted.\n"));
+		break;
+
+	case ZPOOL_STATUS_BAD_LOG:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("An intent log record cannot "
+		    "be read.\n"));
+		break;
+
+	case ZPOOL_STATUS_RESILVERING:
+	case ZPOOL_STATUS_REBUILDING:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices were "
+		    "being resilvered.\n"));
+		break;
+
+	case ZPOOL_STATUS_ERRATA:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("Errata #%d detected.\n"),
+		    errata);
+		break;
+
+	default:
+		/*
+		 * No other status can be seen when importing pools.
+		 */
+		assert(reason == ZPOOL_STATUS_OK);
+	}
+
+	/*
+	 * Print out an action according to the overall state of the pool.
+	 */
+	if (vs->vs_state == VDEV_STATE_HEALTHY) {
+		if (reason == ZPOOL_STATUS_VERSION_OLDER ||
+		    reason == ZPOOL_STATUS_FEAT_DISABLED) {
+			(void) printf(gettext(" action: The pool can be "
+			    "imported using its name or numeric identifier, "
+			    "though\n\tsome features will not be available "
+			    "without an explicit 'zpool upgrade'.\n"));
+		} else if (reason == ZPOOL_STATUS_HOSTID_MISMATCH) {
+			(void) printf(gettext(" action: The pool can be "
+			    "imported using its name or numeric "
+			    "identifier and\n\tthe '-f' flag.\n"));
+		} else if (reason == ZPOOL_STATUS_ERRATA) {
+			switch (errata) {
+			case ZPOOL_ERRATA_NONE:
+				break;
+
+			case ZPOOL_ERRATA_ZOL_2094_SCRUB:
+				(void) printf(gettext(" action: The pool can "
+				    "be imported using its name or numeric "
+				    "identifier,\n\thowever there is a compat"
+				    "ibility issue which should be corrected"
+				    "\n\tby running 'zpool scrub'\n"));
+				break;
+
+			case ZPOOL_ERRATA_ZOL_2094_ASYNC_DESTROY:
+				(void) printf(gettext(" action: The pool can"
+				    "not be imported with this version of ZFS "
+				    "due to\n\tan active asynchronous destroy. "
+				    "Revert to an earlier version\n\tand "
+				    "allow the destroy to complete before "
+				    "updating.\n"));
+				break;
+
+			case ZPOOL_ERRATA_ZOL_6845_ENCRYPTION:
+				(void) printf(gettext(" action: Existing "
+				    "encrypted datasets contain an on-disk "
+				    "incompatibility, which\n\tneeds to be "
+				    "corrected. Backup these datasets to new "
+				    "encrypted datasets\n\tand destroy the "
+				    "old ones.\n"));
+				break;
+
+			case ZPOOL_ERRATA_ZOL_8308_ENCRYPTION:
+				(void) printf(gettext(" action: Existing "
+				    "encrypted snapshots and bookmarks contain "
+				    "an on-disk\n\tincompatibility. This may "
+				    "cause on-disk corruption if they are used"
+				    "\n\twith 'zfs recv'. To correct the "
+				    "issue, enable the bookmark_v2 feature.\n\t"
+				    "No additional action is needed if there "
+				    "are no encrypted snapshots or\n\t"
+				    "bookmarks. If preserving the encrypted "
+				    "snapshots and bookmarks is\n\trequired, "
+				    "use a non-raw send to backup and restore "
+				    "them. Alternately,\n\tthey may be removed"
+				    " to resolve the incompatibility.\n"));
+				break;
+			default:
+				/*
+				 * All errata must contain an action message.
+				 */
+				assert(0);
+			}
+		} else {
+			(void) printf(gettext(" action: The pool can be "
+			    "imported using its name or numeric "
+			    "identifier.\n"));
+		}
+	} else if (vs->vs_state == VDEV_STATE_DEGRADED) {
+		(void) printf(gettext(" action: The pool can be imported "
+		    "despite missing or damaged devices.  The\n\tfault "
+		    "tolerance of the pool may be compromised if imported.\n"));
+	} else {
+		switch (reason) {
+		case ZPOOL_STATUS_VERSION_NEWER:
+			(void) printf(gettext(" action: The pool cannot be "
+			    "imported.  Access the pool on a system running "
+			    "newer\n\tsoftware, or recreate the pool from "
+			    "backup.\n"));
+			break;
+		case ZPOOL_STATUS_UNSUP_FEAT_READ:
+			printf_color(ANSI_BOLD, gettext("action: "));
+			printf_color(ANSI_YELLOW, gettext("The pool cannot be "
+			    "imported. Access the pool on a system that "
+			    "supports\n\tthe required feature(s), or recreate "
+			    "the pool from backup.\n"));
+			break;
+		case ZPOOL_STATUS_UNSUP_FEAT_WRITE:
+			printf_color(ANSI_BOLD, gettext("action: "));
+			printf_color(ANSI_YELLOW, gettext("The pool cannot be "
+			    "imported in read-write mode. Import the pool "
+			    "with\n"
+			    "\t\"-o readonly=on\", access the pool on a system "
+			    "that supports the\n\trequired feature(s), or "
+			    "recreate the pool from backup.\n"));
+			break;
+		case ZPOOL_STATUS_MISSING_DEV_R:
+		case ZPOOL_STATUS_MISSING_DEV_NR:
+		case ZPOOL_STATUS_BAD_GUID_SUM:
+			(void) printf(gettext(" action: The pool cannot be "
+			    "imported. Attach the missing\n\tdevices and try "
+			    "again.\n"));
+			break;
+		case ZPOOL_STATUS_HOSTID_ACTIVE:
+			VERIFY0(nvlist_lookup_nvlist(config,
+			    ZPOOL_CONFIG_LOAD_INFO, &nvinfo));
+
+			if (nvlist_exists(nvinfo, ZPOOL_CONFIG_MMP_HOSTNAME))
+				hostname = fnvlist_lookup_string(nvinfo,
+				    ZPOOL_CONFIG_MMP_HOSTNAME);
+
+			if (nvlist_exists(nvinfo, ZPOOL_CONFIG_MMP_HOSTID))
+				hostid = fnvlist_lookup_uint64(nvinfo,
+				    ZPOOL_CONFIG_MMP_HOSTID);
+
+			(void) printf(gettext(" action: The pool must be "
+			    "exported from %s (hostid=%lx)\n\tbefore it "
+			    "can be safely imported.\n"), hostname,
+			    (unsigned long) hostid);
+			break;
+		case ZPOOL_STATUS_HOSTID_REQUIRED:
+			(void) printf(gettext(" action: Set a unique system "
+			    "hostid with the zgenhostid(8) command.\n"));
+			break;
+		default:
+			(void) printf(gettext(" action: The pool cannot be "
+			    "imported due to damaged devices or data.\n"));
+		}
+	}
+
+	/* Print the comment attached to the pool. */
+	if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0)
+		(void) printf(gettext("comment: %s\n"), comment);
+
+	/*
+	 * If the state is "closed" or "can't open", and the aux state
+	 * is "corrupt data":
+	 */
+	if (((vs->vs_state == VDEV_STATE_CLOSED) ||
+	    (vs->vs_state == VDEV_STATE_CANT_OPEN)) &&
+	    (vs->vs_aux == VDEV_AUX_CORRUPT_DATA)) {
+		if (pool_state == POOL_STATE_DESTROYED)
+			(void) printf(gettext("\tThe pool was destroyed, "
+			    "but can be imported using the '-Df' flags.\n"));
+		else if (pool_state != POOL_STATE_EXPORTED)
+			(void) printf(gettext("\tThe pool may be active on "
+			    "another system, but can be imported using\n\t"
+			    "the '-f' flag.\n"));
+	}
+
+	if (msgid != NULL) {
+		(void) printf(gettext(
+		    "   see: https://zfsonlinux.org/msg/%s\n"), msgid);
+	}
+
+	(void) printf(gettext(" config:\n\n"));
+
+	cb.cb_namewidth = max_width(NULL, nvroot, 0, strlen(name),
+	    VDEV_NAME_TYPE_ID);
+	if (cb.cb_namewidth < 10)
+		cb.cb_namewidth = 10;
+
+	print_import_config(&cb, name, nvroot, 0);
+
+	print_class_vdevs(NULL, &cb, nvroot, VDEV_ALLOC_BIAS_DEDUP);
+	print_class_vdevs(NULL, &cb, nvroot, VDEV_ALLOC_BIAS_SPECIAL);
+	print_class_vdevs(NULL, &cb, nvroot, VDEV_ALLOC_CLASS_LOGS);
+
+	if (reason == ZPOOL_STATUS_BAD_GUID_SUM) {
+		(void) printf(gettext("\n\tAdditional devices are known to "
+		    "be part of this pool, though their\n\texact "
+		    "configuration cannot be determined.\n"));
+	}
+}
+
+static boolean_t
+zfs_force_import_required(nvlist_t *config)
+{
+	uint64_t state;
+	uint64_t hostid = 0;
+	nvlist_t *nvinfo;
+
+	state = fnvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE);
+	(void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_HOSTID, &hostid);
+
+	if (state != POOL_STATE_EXPORTED && hostid != get_system_hostid())
+		return (B_TRUE);
+
+	nvinfo = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO);
+	if (nvlist_exists(nvinfo, ZPOOL_CONFIG_MMP_STATE)) {
+		mmp_state_t mmp_state = fnvlist_lookup_uint64(nvinfo,
+		    ZPOOL_CONFIG_MMP_STATE);
+
+		if (mmp_state != MMP_STATE_INACTIVE)
+			return (B_TRUE);
+	}
+
+	return (B_FALSE);
+}
+
+/*
+ * Perform the import for the given configuration.  This passes the heavy
+ * lifting off to zpool_import_props(), and then mounts the datasets contained
+ * within the pool.
+ */
+static int
+do_import(nvlist_t *config, const char *newname, const char *mntopts,
+    nvlist_t *props, int flags)
+{
+	int ret = 0;
+	zpool_handle_t *zhp;
+	char *name;
+	uint64_t version;
+
+	name = fnvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME);
+	version = fnvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION);
+
+	if (!SPA_VERSION_IS_SUPPORTED(version)) {
+		(void) fprintf(stderr, gettext("cannot import '%s': pool "
+		    "is formatted using an unsupported ZFS version\n"), name);
+		return (1);
+	} else if (zfs_force_import_required(config) &&
+	    !(flags & ZFS_IMPORT_ANY_HOST)) {
+		mmp_state_t mmp_state = MMP_STATE_INACTIVE;
+		nvlist_t *nvinfo;
+
+		nvinfo = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO);
+		if (nvlist_exists(nvinfo, ZPOOL_CONFIG_MMP_STATE))
+			mmp_state = fnvlist_lookup_uint64(nvinfo,
+			    ZPOOL_CONFIG_MMP_STATE);
+
+		if (mmp_state == MMP_STATE_ACTIVE) {
+			char *hostname = "<unknown>";
+			uint64_t hostid = 0;
+
+			if (nvlist_exists(nvinfo, ZPOOL_CONFIG_MMP_HOSTNAME))
+				hostname = fnvlist_lookup_string(nvinfo,
+				    ZPOOL_CONFIG_MMP_HOSTNAME);
+
+			if (nvlist_exists(nvinfo, ZPOOL_CONFIG_MMP_HOSTID))
+				hostid = fnvlist_lookup_uint64(nvinfo,
+				    ZPOOL_CONFIG_MMP_HOSTID);
+
+			(void) fprintf(stderr, gettext("cannot import '%s': "
+			    "pool is imported on %s (hostid: "
+			    "0x%lx)\nExport the pool on the other system, "
+			    "then run 'zpool import'.\n"),
+			    name, hostname, (unsigned long) hostid);
+		} else if (mmp_state == MMP_STATE_NO_HOSTID) {
+			(void) fprintf(stderr, gettext("Cannot import '%s': "
+			    "pool has the multihost property on and the\n"
+			    "system's hostid is not set. Set a unique hostid "
+			    "with the zgenhostid(8) command.\n"), name);
+		} else {
+			char *hostname = "<unknown>";
+			uint64_t timestamp = 0;
+			uint64_t hostid = 0;
+
+			if (nvlist_exists(config, ZPOOL_CONFIG_HOSTNAME))
+				hostname = fnvlist_lookup_string(config,
+				    ZPOOL_CONFIG_HOSTNAME);
+
+			if (nvlist_exists(config, ZPOOL_CONFIG_TIMESTAMP))
+				timestamp = fnvlist_lookup_uint64(config,
+				    ZPOOL_CONFIG_TIMESTAMP);
+
+			if (nvlist_exists(config, ZPOOL_CONFIG_HOSTID))
+				hostid = fnvlist_lookup_uint64(config,
+				    ZPOOL_CONFIG_HOSTID);
+
+			(void) fprintf(stderr, gettext("cannot import '%s': "
+			    "pool was previously in use from another system.\n"
+			    "Last accessed by %s (hostid=%lx) at %s"
+			    "The pool can be imported, use 'zpool import -f' "
+			    "to import the pool.\n"), name, hostname,
+			    (unsigned long)hostid, ctime((time_t *)&timestamp));
+		}
+
+		return (1);
+	}
+
+	if (zpool_import_props(g_zfs, config, newname, props, flags) != 0)
+		return (1);
+
+	if (newname != NULL)
+		name = (char *)newname;
+
+	if ((zhp = zpool_open_canfail(g_zfs, name)) == NULL)
+		return (1);
+
+	/*
+	 * Loading keys is best effort. We don't want to return immediately
+	 * if it fails but we do want to give the error to the caller.
+	 */
+	if (flags & ZFS_IMPORT_LOAD_KEYS) {
+		ret = zfs_crypto_attempt_load_keys(g_zfs, name);
+		if (ret != 0)
+			ret = 1;
+	}
+
+	if (zpool_get_state(zhp) != POOL_STATE_UNAVAIL &&
+	    !(flags & ZFS_IMPORT_ONLY) &&
+	    zpool_enable_datasets(zhp, mntopts, 0) != 0) {
+		zpool_close(zhp);
+		return (1);
+	}
+
+	zpool_close(zhp);
+	return (ret);
+}
+
+typedef struct target_exists_args {
+	const char	*poolname;
+	uint64_t	poolguid;
+} target_exists_args_t;
+
+static int
+name_or_guid_exists(zpool_handle_t *zhp, void *data)
+{
+	target_exists_args_t *args = data;
+	nvlist_t *config = zpool_get_config(zhp, NULL);
+	int found = 0;
+
+	if (config == NULL)
+		return (0);
+
+	if (args->poolname != NULL) {
+		char *pool_name;
+
+		verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
+		    &pool_name) == 0);
+		if (strcmp(pool_name, args->poolname) == 0)
+			found = 1;
+	} else {
+		uint64_t pool_guid;
+
+		verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
+		    &pool_guid) == 0);
+		if (pool_guid == args->poolguid)
+			found = 1;
+	}
+	zpool_close(zhp);
+
+	return (found);
+}
+/*
+ * zpool checkpoint <pool>
+ *       checkpoint --discard <pool>
+ *
+ *       -d         Discard the checkpoint from a checkpointed
+ *       --discard  pool.
+ *
+ *       -w         Wait for discarding a checkpoint to complete.
+ *       --wait
+ *
+ * Checkpoints the specified pool, by taking a "snapshot" of its
+ * current state. A pool can only have one checkpoint at a time.
+ */
+int
+zpool_do_checkpoint(int argc, char **argv)
+{
+	boolean_t discard, wait;
+	char *pool;
+	zpool_handle_t *zhp;
+	int c, err;
+
+	struct option long_options[] = {
+		{"discard", no_argument, NULL, 'd'},
+		{"wait", no_argument, NULL, 'w'},
+		{0, 0, 0, 0}
+	};
+
+	discard = B_FALSE;
+	wait = B_FALSE;
+	while ((c = getopt_long(argc, argv, ":dw", long_options, NULL)) != -1) {
+		switch (c) {
+		case 'd':
+			discard = B_TRUE;
+			break;
+		case 'w':
+			wait = B_TRUE;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	if (wait && !discard) {
+		(void) fprintf(stderr, gettext("--wait only valid when "
+		    "--discard also specified\n"));
+		usage(B_FALSE);
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool argument\n"));
+		usage(B_FALSE);
+	}
+
+	if (argc > 1) {
+		(void) fprintf(stderr, gettext("too many arguments\n"));
+		usage(B_FALSE);
+	}
+
+	pool = argv[0];
+
+	if ((zhp = zpool_open(g_zfs, pool)) == NULL) {
+		/* As a special case, check for use of '/' in the name */
+		if (strchr(pool, '/') != NULL)
+			(void) fprintf(stderr, gettext("'zpool checkpoint' "
+			    "doesn't work on datasets. To save the state "
+			    "of a dataset from a specific point in time "
+			    "please use 'zfs snapshot'\n"));
+		return (1);
+	}
+
+	if (discard) {
+		err = (zpool_discard_checkpoint(zhp) != 0);
+		if (err == 0 && wait)
+			err = zpool_wait(zhp, ZPOOL_WAIT_CKPT_DISCARD);
+	} else {
+		err = (zpool_checkpoint(zhp) != 0);
+	}
+
+	zpool_close(zhp);
+
+	return (err);
+}
+
+#define	CHECKPOINT_OPT	1024
+
+/*
+ * zpool import [-d dir] [-D]
+ *       import [-o mntopts] [-o prop=value] ... [-R root] [-D] [-l]
+ *              [-d dir | -c cachefile] [-f] -a
+ *       import [-o mntopts] [-o prop=value] ... [-R root] [-D] [-l]
+ *              [-d dir | -c cachefile] [-f] [-n] [-F] <pool | id> [newpool]
+ *
+ *	 -c	Read pool information from a cachefile instead of searching
+ *		devices.
+ *
+ *       -d	Scan in a specific directory, other than /dev/.  More than
+ *		one directory can be specified using multiple '-d' options.
+ *
+ *       -D     Scan for previously destroyed pools or import all or only
+ *              specified destroyed pools.
+ *
+ *       -R	Temporarily import the pool, with all mountpoints relative to
+ *		the given root.  The pool will remain exported when the machine
+ *		is rebooted.
+ *
+ *       -V	Import even in the presence of faulted vdevs.  This is an
+ *       	intentionally undocumented option for testing purposes, and
+ *       	treats the pool configuration as complete, leaving any bad
+ *		vdevs in the FAULTED state. In other words, it does verbatim
+ *		import.
+ *
+ *       -f	Force import, even if it appears that the pool is active.
+ *
+ *       -F     Attempt rewind if necessary.
+ *
+ *       -n     See if rewind would work, but don't actually rewind.
+ *
+ *       -N     Import the pool but don't mount datasets.
+ *
+ *       -T     Specify a starting txg to use for import. This option is
+ *       	intentionally undocumented option for testing purposes.
+ *
+ *       -a	Import all pools found.
+ *
+ *       -l	Load encryption keys while importing.
+ *
+ *       -o	Set property=value and/or temporary mount options (without '=').
+ *
+ *	 -s	Scan using the default search path, the libblkid cache will
+ *	        not be consulted.
+ *
+ *       --rewind-to-checkpoint
+ *       	Import the pool and revert back to the checkpoint.
+ *
+ * The import command scans for pools to import, and import pools based on pool
+ * name and GUID.  The pool can also be renamed as part of the import process.
+ */
+int
+zpool_do_import(int argc, char **argv)
+{
+	char **searchdirs = NULL;
+	char *env, *envdup = NULL;
+	int nsearch = 0;
+	int c;
+	int err = 0;
+	nvlist_t *pools = NULL;
+	boolean_t do_all = B_FALSE;
+	boolean_t do_destroyed = B_FALSE;
+	char *mntopts = NULL;
+	nvpair_t *elem;
+	nvlist_t *config;
+	uint64_t searchguid = 0;
+	char *searchname = NULL;
+	char *propval;
+	nvlist_t *found_config;
+	nvlist_t *policy = NULL;
+	nvlist_t *props = NULL;
+	boolean_t first;
+	int flags = ZFS_IMPORT_NORMAL;
+	uint32_t rewind_policy = ZPOOL_NO_REWIND;
+	boolean_t dryrun = B_FALSE;
+	boolean_t do_rewind = B_FALSE;
+	boolean_t xtreme_rewind = B_FALSE;
+	boolean_t do_scan = B_FALSE;
+	boolean_t pool_exists = B_FALSE;
+	uint64_t pool_state, txg = -1ULL;
+	char *cachefile = NULL;
+	importargs_t idata = { 0 };
+	char *endptr;
+
+	struct option long_options[] = {
+		{"rewind-to-checkpoint", no_argument, NULL, CHECKPOINT_OPT},
+		{0, 0, 0, 0}
+	};
+
+	/* check options */
+	while ((c = getopt_long(argc, argv, ":aCc:d:DEfFlmnNo:R:stT:VX",
+	    long_options, NULL)) != -1) {
+		switch (c) {
+		case 'a':
+			do_all = B_TRUE;
+			break;
+		case 'c':
+			cachefile = optarg;
+			break;
+		case 'd':
+			if (searchdirs == NULL) {
+				searchdirs = safe_malloc(sizeof (char *));
+			} else {
+				char **tmp = safe_malloc((nsearch + 1) *
+				    sizeof (char *));
+				bcopy(searchdirs, tmp, nsearch *
+				    sizeof (char *));
+				free(searchdirs);
+				searchdirs = tmp;
+			}
+			searchdirs[nsearch++] = optarg;
+			break;
+		case 'D':
+			do_destroyed = B_TRUE;
+			break;
+		case 'f':
+			flags |= ZFS_IMPORT_ANY_HOST;
+			break;
+		case 'F':
+			do_rewind = B_TRUE;
+			break;
+		case 'l':
+			flags |= ZFS_IMPORT_LOAD_KEYS;
+			break;
+		case 'm':
+			flags |= ZFS_IMPORT_MISSING_LOG;
+			break;
+		case 'n':
+			dryrun = B_TRUE;
+			break;
+		case 'N':
+			flags |= ZFS_IMPORT_ONLY;
+			break;
+		case 'o':
+			if ((propval = strchr(optarg, '=')) != NULL) {
+				*propval = '\0';
+				propval++;
+				if (add_prop_list(optarg, propval,
+				    &props, B_TRUE))
+					goto error;
+			} else {
+				mntopts = optarg;
+			}
+			break;
+		case 'R':
+			if (add_prop_list(zpool_prop_to_name(
+			    ZPOOL_PROP_ALTROOT), optarg, &props, B_TRUE))
+				goto error;
+			if (add_prop_list_default(zpool_prop_to_name(
+			    ZPOOL_PROP_CACHEFILE), "none", &props, B_TRUE))
+				goto error;
+			break;
+		case 's':
+			do_scan = B_TRUE;
+			break;
+		case 't':
+			flags |= ZFS_IMPORT_TEMP_NAME;
+			if (add_prop_list_default(zpool_prop_to_name(
+			    ZPOOL_PROP_CACHEFILE), "none", &props, B_TRUE))
+				goto error;
+			break;
+
+		case 'T':
+			errno = 0;
+			txg = strtoull(optarg, &endptr, 0);
+			if (errno != 0 || *endptr != '\0') {
+				(void) fprintf(stderr,
+				    gettext("invalid txg value\n"));
+				usage(B_FALSE);
+			}
+			rewind_policy = ZPOOL_DO_REWIND | ZPOOL_EXTREME_REWIND;
+			break;
+		case 'V':
+			flags |= ZFS_IMPORT_VERBATIM;
+			break;
+		case 'X':
+			xtreme_rewind = B_TRUE;
+			break;
+		case CHECKPOINT_OPT:
+			flags |= ZFS_IMPORT_CHECKPOINT;
+			break;
+		case ':':
+			(void) fprintf(stderr, gettext("missing argument for "
+			    "'%c' option\n"), optopt);
+			usage(B_FALSE);
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (cachefile && nsearch != 0) {
+		(void) fprintf(stderr, gettext("-c is incompatible with -d\n"));
+		usage(B_FALSE);
+	}
+
+	if ((flags & ZFS_IMPORT_LOAD_KEYS) && (flags & ZFS_IMPORT_ONLY)) {
+		(void) fprintf(stderr, gettext("-l is incompatible with -N\n"));
+		usage(B_FALSE);
+	}
+
+	if ((flags & ZFS_IMPORT_LOAD_KEYS) && !do_all && argc == 0) {
+		(void) fprintf(stderr, gettext("-l is only meaningful during "
+		    "an import\n"));
+		usage(B_FALSE);
+	}
+
+	if ((dryrun || xtreme_rewind) && !do_rewind) {
+		(void) fprintf(stderr,
+		    gettext("-n or -X only meaningful with -F\n"));
+		usage(B_FALSE);
+	}
+	if (dryrun)
+		rewind_policy = ZPOOL_TRY_REWIND;
+	else if (do_rewind)
+		rewind_policy = ZPOOL_DO_REWIND;
+	if (xtreme_rewind)
+		rewind_policy |= ZPOOL_EXTREME_REWIND;
+
+	/* In the future, we can capture further policy and include it here */
+	if (nvlist_alloc(&policy, NV_UNIQUE_NAME, 0) != 0 ||
+	    nvlist_add_uint64(policy, ZPOOL_LOAD_REQUEST_TXG, txg) != 0 ||
+	    nvlist_add_uint32(policy, ZPOOL_LOAD_REWIND_POLICY,
+	    rewind_policy) != 0)
+		goto error;
+
+	/* check argument count */
+	if (do_all) {
+		if (argc != 0) {
+			(void) fprintf(stderr, gettext("too many arguments\n"));
+			usage(B_FALSE);
+		}
+	} else {
+		if (argc > 2) {
+			(void) fprintf(stderr, gettext("too many arguments\n"));
+			usage(B_FALSE);
+		}
+	}
+
+	/*
+	 * Check for the effective uid.  We do this explicitly here because
+	 * otherwise any attempt to discover pools will silently fail.
+	 */
+	if (argc == 0 && geteuid() != 0) {
+		(void) fprintf(stderr, gettext("cannot "
+		    "discover pools: permission denied\n"));
+		if (searchdirs != NULL)
+			free(searchdirs);
+
+		nvlist_free(props);
+		nvlist_free(policy);
+		return (1);
+	}
+
+	/*
+	 * Depending on the arguments given, we do one of the following:
+	 *
+	 *	<none>	Iterate through all pools and display information about
+	 *		each one.
+	 *
+	 *	-a	Iterate through all pools and try to import each one.
+	 *
+	 *	<id>	Find the pool that corresponds to the given GUID/pool
+	 *		name and import that one.
+	 *
+	 *	-D	Above options applies only to destroyed pools.
+	 */
+	if (argc != 0) {
+		char *endptr;
+
+		errno = 0;
+		searchguid = strtoull(argv[0], &endptr, 10);
+		if (errno != 0 || *endptr != '\0') {
+			searchname = argv[0];
+			searchguid = 0;
+		}
+		found_config = NULL;
+
+		/*
+		 * User specified a name or guid.  Ensure it's unique.
+		 */
+		target_exists_args_t search = {searchname, searchguid};
+		pool_exists = zpool_iter(g_zfs, name_or_guid_exists, &search);
+	}
+
+	/*
+	 * Check the environment for the preferred search path.
+	 */
+	if ((searchdirs == NULL) && (env = getenv("ZPOOL_IMPORT_PATH"))) {
+		char *dir;
+
+		envdup = strdup(env);
+
+		dir = strtok(envdup, ":");
+		while (dir != NULL) {
+			if (searchdirs == NULL) {
+				searchdirs = safe_malloc(sizeof (char *));
+			} else {
+				char **tmp = safe_malloc((nsearch + 1) *
+				    sizeof (char *));
+				bcopy(searchdirs, tmp, nsearch *
+				    sizeof (char *));
+				free(searchdirs);
+				searchdirs = tmp;
+			}
+			searchdirs[nsearch++] = dir;
+			dir = strtok(NULL, ":");
+		}
+	}
+
+	idata.path = searchdirs;
+	idata.paths = nsearch;
+	idata.poolname = searchname;
+	idata.guid = searchguid;
+	idata.cachefile = cachefile;
+	idata.scan = do_scan;
+	idata.policy = policy;
+
+	pools = zpool_search_import(g_zfs, &idata, &libzfs_config_ops);
+
+	if (pools != NULL && pool_exists &&
+	    (argc == 1 || strcmp(argv[0], argv[1]) == 0)) {
+		(void) fprintf(stderr, gettext("cannot import '%s': "
+		    "a pool with that name already exists\n"),
+		    argv[0]);
+		(void) fprintf(stderr, gettext("use the form '%s "
+		    "<pool | id> <newpool>' to give it a new name\n"),
+		    "zpool import");
+		err = 1;
+	} else if (pools == NULL && pool_exists) {
+		(void) fprintf(stderr, gettext("cannot import '%s': "
+		    "a pool with that name is already created/imported,\n"),
+		    argv[0]);
+		(void) fprintf(stderr, gettext("and no additional pools "
+		    "with that name were found\n"));
+		err = 1;
+	} else if (pools == NULL) {
+		if (argc != 0) {
+			(void) fprintf(stderr, gettext("cannot import '%s': "
+			    "no such pool available\n"), argv[0]);
+		}
+		err = 1;
+	}
+
+	if (err == 1) {
+		if (searchdirs != NULL)
+			free(searchdirs);
+		if (envdup != NULL)
+			free(envdup);
+		nvlist_free(policy);
+		nvlist_free(pools);
+		nvlist_free(props);
+		return (1);
+	}
+
+	/*
+	 * At this point we have a list of import candidate configs. Even if
+	 * we were searching by pool name or guid, we still need to
+	 * post-process the list to deal with pool state and possible
+	 * duplicate names.
+	 */
+	err = 0;
+	elem = NULL;
+	first = B_TRUE;
+	while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) {
+
+		verify(nvpair_value_nvlist(elem, &config) == 0);
+
+		verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE,
+		    &pool_state) == 0);
+		if (!do_destroyed && pool_state == POOL_STATE_DESTROYED)
+			continue;
+		if (do_destroyed && pool_state != POOL_STATE_DESTROYED)
+			continue;
+
+		verify(nvlist_add_nvlist(config, ZPOOL_LOAD_POLICY,
+		    policy) == 0);
+
+		if (argc == 0) {
+			if (first)
+				first = B_FALSE;
+			else if (!do_all)
+				(void) printf("\n");
+
+			if (do_all) {
+				err |= do_import(config, NULL, mntopts,
+				    props, flags);
+			} else {
+				show_import(config);
+			}
+		} else if (searchname != NULL) {
+			char *name;
+
+			/*
+			 * We are searching for a pool based on name.
+			 */
+			verify(nvlist_lookup_string(config,
+			    ZPOOL_CONFIG_POOL_NAME, &name) == 0);
+
+			if (strcmp(name, searchname) == 0) {
+				if (found_config != NULL) {
+					(void) fprintf(stderr, gettext(
+					    "cannot import '%s': more than "
+					    "one matching pool\n"), searchname);
+					(void) fprintf(stderr, gettext(
+					    "import by numeric ID instead\n"));
+					err = B_TRUE;
+				}
+				found_config = config;
+			}
+		} else {
+			uint64_t guid;
+
+			/*
+			 * Search for a pool by guid.
+			 */
+			verify(nvlist_lookup_uint64(config,
+			    ZPOOL_CONFIG_POOL_GUID, &guid) == 0);
+
+			if (guid == searchguid)
+				found_config = config;
+		}
+	}
+
+	/*
+	 * If we were searching for a specific pool, verify that we found a
+	 * pool, and then do the import.
+	 */
+	if (argc != 0 && err == 0) {
+		if (found_config == NULL) {
+			(void) fprintf(stderr, gettext("cannot import '%s': "
+			    "no such pool available\n"), argv[0]);
+			err = B_TRUE;
+		} else {
+			err |= do_import(found_config, argc == 1 ? NULL :
+			    argv[1], mntopts, props, flags);
+		}
+	}
+
+	/*
+	 * If we were just looking for pools, report an error if none were
+	 * found.
+	 */
+	if (argc == 0 && first)
+		(void) fprintf(stderr,
+		    gettext("no pools available to import\n"));
+
+error:
+	nvlist_free(props);
+	nvlist_free(pools);
+	nvlist_free(policy);
+	if (searchdirs != NULL)
+		free(searchdirs);
+	if (envdup != NULL)
+		free(envdup);
+
+	return (err ? 1 : 0);
+}
+
+/*
+ * zpool sync [-f] [pool] ...
+ *
+ * -f (undocumented) force uberblock (and config including zpool cache file)
+ *    update.
+ *
+ * Sync the specified pool(s).
+ * Without arguments "zpool sync" will sync all pools.
+ * This command initiates TXG sync(s) and will return after the TXG(s) commit.
+ *
+ */
+static int
+zpool_do_sync(int argc, char **argv)
+{
+	int ret;
+	boolean_t force = B_FALSE;
+
+	/* check options */
+	while ((ret  = getopt(argc, argv, "f")) != -1) {
+		switch (ret) {
+		case 'f':
+			force = B_TRUE;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* if argc == 0 we will execute zpool_sync_one on all pools */
+	ret = for_each_pool(argc, argv, B_FALSE, NULL, zpool_sync_one, &force);
+
+	return (ret);
+}
+
+typedef struct iostat_cbdata {
+	uint64_t cb_flags;
+	int cb_name_flags;
+	int cb_namewidth;
+	int cb_iteration;
+	char **cb_vdev_names; /* Only show these vdevs */
+	unsigned int cb_vdev_names_count;
+	boolean_t cb_verbose;
+	boolean_t cb_literal;
+	boolean_t cb_scripted;
+	zpool_list_t *cb_list;
+	vdev_cmd_data_list_t *vcdl;
+} iostat_cbdata_t;
+
+/*  iostat labels */
+typedef struct name_and_columns {
+	const char *name;	/* Column name */
+	unsigned int columns;	/* Center name to this number of columns */
+} name_and_columns_t;
+
+#define	IOSTAT_MAX_LABELS	13	/* Max number of labels on one line */
+
+static const name_and_columns_t iostat_top_labels[][IOSTAT_MAX_LABELS] =
+{
+	[IOS_DEFAULT] = {{"capacity", 2}, {"operations", 2}, {"bandwidth", 2},
+	    {NULL}},
+	[IOS_LATENCY] = {{"total_wait", 2}, {"disk_wait", 2}, {"syncq_wait", 2},
+	    {"asyncq_wait", 2}, {"scrub", 1}, {"trim", 1}, {NULL}},
+	[IOS_QUEUES] = {{"syncq_read", 2}, {"syncq_write", 2},
+	    {"asyncq_read", 2}, {"asyncq_write", 2}, {"scrubq_read", 2},
+	    {"trimq_write", 2}, {NULL}},
+	[IOS_L_HISTO] = {{"total_wait", 2}, {"disk_wait", 2}, {"syncq_wait", 2},
+	    {"asyncq_wait", 2}, {NULL}},
+	[IOS_RQ_HISTO] = {{"sync_read", 2}, {"sync_write", 2},
+	    {"async_read", 2}, {"async_write", 2}, {"scrub", 2},
+	    {"trim", 2}, {NULL}},
+};
+
+/* Shorthand - if "columns" field not set, default to 1 column */
+static const name_and_columns_t iostat_bottom_labels[][IOSTAT_MAX_LABELS] =
+{
+	[IOS_DEFAULT] = {{"alloc"}, {"free"}, {"read"}, {"write"}, {"read"},
+	    {"write"}, {NULL}},
+	[IOS_LATENCY] = {{"read"}, {"write"}, {"read"}, {"write"}, {"read"},
+	    {"write"}, {"read"}, {"write"}, {"wait"}, {"wait"}, {NULL}},
+	[IOS_QUEUES] = {{"pend"}, {"activ"}, {"pend"}, {"activ"}, {"pend"},
+	    {"activ"}, {"pend"}, {"activ"}, {"pend"}, {"activ"},
+	    {"pend"}, {"activ"}, {NULL}},
+	[IOS_L_HISTO] = {{"read"}, {"write"}, {"read"}, {"write"}, {"read"},
+	    {"write"}, {"read"}, {"write"}, {"scrub"}, {"trim"}, {NULL}},
+	[IOS_RQ_HISTO] = {{"ind"}, {"agg"}, {"ind"}, {"agg"}, {"ind"}, {"agg"},
+	    {"ind"}, {"agg"}, {"ind"}, {"agg"}, {"ind"}, {"agg"}, {NULL}},
+};
+
+static const char *histo_to_title[] = {
+	[IOS_L_HISTO] = "latency",
+	[IOS_RQ_HISTO] = "req_size",
+};
+
+/*
+ * Return the number of labels in a null-terminated name_and_columns_t
+ * array.
+ *
+ */
+static unsigned int
+label_array_len(const name_and_columns_t *labels)
+{
+	int i = 0;
+
+	while (labels[i].name)
+		i++;
+
+	return (i);
+}
+
+/*
+ * Return the number of strings in a null-terminated string array.
+ * For example:
+ *
+ *     const char foo[] = {"bar", "baz", NULL}
+ *
+ * returns 2
+ */
+static uint64_t
+str_array_len(const char *array[])
+{
+	uint64_t i = 0;
+	while (array[i])
+		i++;
+
+	return (i);
+}
+
+
+/*
+ * Return a default column width for default/latency/queue columns. This does
+ * not include histograms, which have their columns autosized.
+ */
+static unsigned int
+default_column_width(iostat_cbdata_t *cb, enum iostat_type type)
+{
+	unsigned long column_width = 5; /* Normal niceprint */
+	static unsigned long widths[] = {
+		/*
+		 * Choose some sane default column sizes for printing the
+		 * raw numbers.
+		 */
+		[IOS_DEFAULT] = 15, /* 1PB capacity */
+		[IOS_LATENCY] = 10, /* 1B ns = 10sec */
+		[IOS_QUEUES] = 6,   /* 1M queue entries */
+		[IOS_L_HISTO] = 10, /* 1B ns = 10sec */
+		[IOS_RQ_HISTO] = 6, /* 1M queue entries */
+	};
+
+	if (cb->cb_literal)
+		column_width = widths[type];
+
+	return (column_width);
+}
+
+/*
+ * Print the column labels, i.e:
+ *
+ *   capacity     operations     bandwidth
+ * alloc   free   read  write   read  write  ...
+ *
+ * If force_column_width is set, use it for the column width.  If not set, use
+ * the default column width.
+ */
+static void
+print_iostat_labels(iostat_cbdata_t *cb, unsigned int force_column_width,
+    const name_and_columns_t labels[][IOSTAT_MAX_LABELS])
+{
+	int i, idx, s;
+	int text_start, rw_column_width, spaces_to_end;
+	uint64_t flags = cb->cb_flags;
+	uint64_t f;
+	unsigned int column_width = force_column_width;
+
+	/* For each bit set in flags */
+	for (f = flags; f; f &= ~(1ULL << idx)) {
+		idx = lowbit64(f) - 1;
+		if (!force_column_width)
+			column_width = default_column_width(cb, idx);
+		/* Print our top labels centered over "read  write" label. */
+		for (i = 0; i < label_array_len(labels[idx]); i++) {
+			const char *name = labels[idx][i].name;
+			/*
+			 * We treat labels[][].columns == 0 as shorthand
+			 * for one column.  It makes writing out the label
+			 * tables more concise.
+			 */
+			unsigned int columns = MAX(1, labels[idx][i].columns);
+			unsigned int slen = strlen(name);
+
+			rw_column_width = (column_width * columns) +
+			    (2 * (columns - 1));
+
+			text_start = (int)((rw_column_width) / columns -
+			    slen / columns);
+			if (text_start < 0)
+				text_start = 0;
+
+			printf("  ");	/* Two spaces between columns */
+
+			/* Space from beginning of column to label */
+			for (s = 0; s < text_start; s++)
+				printf(" ");
+
+			printf("%s", name);
+
+			/* Print space after label to end of column */
+			spaces_to_end = rw_column_width - text_start - slen;
+			if (spaces_to_end < 0)
+				spaces_to_end = 0;
+
+			for (s = 0; s < spaces_to_end; s++)
+				printf(" ");
+		}
+	}
+}
+
+
+/*
+ * print_cmd_columns - Print custom column titles from -c
+ *
+ * If the user specified the "zpool status|iostat -c" then print their custom
+ * column titles in the header.  For example, print_cmd_columns() would print
+ * the "  col1  col2" part of this:
+ *
+ * $ zpool iostat -vc 'echo col1=val1; echo col2=val2'
+ * ...
+ *	      capacity     operations     bandwidth
+ * pool        alloc   free   read  write   read  write  col1  col2
+ * ----------  -----  -----  -----  -----  -----  -----  ----  ----
+ * mypool       269K  1008M      0      0    107    946
+ *   mirror     269K  1008M      0      0    107    946
+ *     sdb         -      -      0      0    102    473  val1  val2
+ *     sdc         -      -      0      0      5    473  val1  val2
+ * ----------  -----  -----  -----  -----  -----  -----  ----  ----
+ */
+static void
+print_cmd_columns(vdev_cmd_data_list_t *vcdl, int use_dashes)
+{
+	int i, j;
+	vdev_cmd_data_t *data = &vcdl->data[0];
+
+	if (vcdl->count == 0 || data == NULL)
+		return;
+
+	/*
+	 * Each vdev cmd should have the same column names unless the user did
+	 * something weird with their cmd.  Just take the column names from the
+	 * first vdev and assume it works for all of them.
+	 */
+	for (i = 0; i < vcdl->uniq_cols_cnt; i++) {
+		printf("  ");
+		if (use_dashes) {
+			for (j = 0; j < vcdl->uniq_cols_width[i]; j++)
+				printf("-");
+		} else {
+			printf_color(ANSI_BOLD, "%*s", vcdl->uniq_cols_width[i],
+			    vcdl->uniq_cols[i]);
+		}
+	}
+}
+
+
+/*
+ * Utility function to print out a line of dashes like:
+ *
+ * 	--------------------------------  -----  -----  -----  -----  -----
+ *
+ * ...or a dashed named-row line like:
+ *
+ * 	logs                                  -      -      -      -      -
+ *
+ * @cb:				iostat data
+ *
+ * @force_column_width		If non-zero, use the value as the column width.
+ * 				Otherwise use the default column widths.
+ *
+ * @name:			Print a dashed named-row line starting
+ * 				with @name.  Otherwise, print a regular
+ * 				dashed line.
+ */
+static void
+print_iostat_dashes(iostat_cbdata_t *cb, unsigned int force_column_width,
+    const char *name)
+{
+	int i;
+	unsigned int namewidth;
+	uint64_t flags = cb->cb_flags;
+	uint64_t f;
+	int idx;
+	const name_and_columns_t *labels;
+	const char *title;
+
+
+	if (cb->cb_flags & IOS_ANYHISTO_M) {
+		title = histo_to_title[IOS_HISTO_IDX(cb->cb_flags)];
+	} else if (cb->cb_vdev_names_count) {
+		title = "vdev";
+	} else  {
+		title = "pool";
+	}
+
+	namewidth = MAX(MAX(strlen(title), cb->cb_namewidth),
+	    name ? strlen(name) : 0);
+
+
+	if (name) {
+		printf("%-*s", namewidth, name);
+	} else {
+		for (i = 0; i < namewidth; i++)
+			(void) printf("-");
+	}
+
+	/* For each bit in flags */
+	for (f = flags; f; f &= ~(1ULL << idx)) {
+		unsigned int column_width;
+		idx = lowbit64(f) - 1;
+		if (force_column_width)
+			column_width = force_column_width;
+		else
+			column_width = default_column_width(cb, idx);
+
+		labels = iostat_bottom_labels[idx];
+		for (i = 0; i < label_array_len(labels); i++) {
+			if (name)
+				printf("  %*s-", column_width - 1, " ");
+			else
+				printf("  %.*s", column_width,
+				    "--------------------");
+		}
+	}
+}
+
+
+static void
+print_iostat_separator_impl(iostat_cbdata_t *cb,
+    unsigned int force_column_width)
+{
+	print_iostat_dashes(cb, force_column_width, NULL);
+}
+
+static void
+print_iostat_separator(iostat_cbdata_t *cb)
+{
+	print_iostat_separator_impl(cb, 0);
+}
+
+static void
+print_iostat_header_impl(iostat_cbdata_t *cb, unsigned int force_column_width,
+    const char *histo_vdev_name)
+{
+	unsigned int namewidth;
+	const char *title;
+
+	if (cb->cb_flags & IOS_ANYHISTO_M) {
+		title = histo_to_title[IOS_HISTO_IDX(cb->cb_flags)];
+	} else if (cb->cb_vdev_names_count) {
+		title = "vdev";
+	} else  {
+		title = "pool";
+	}
+
+	namewidth = MAX(MAX(strlen(title), cb->cb_namewidth),
+	    histo_vdev_name ? strlen(histo_vdev_name) : 0);
+
+	if (histo_vdev_name)
+		printf("%-*s", namewidth, histo_vdev_name);
+	else
+		printf("%*s", namewidth, "");
+
+
+	print_iostat_labels(cb, force_column_width, iostat_top_labels);
+	printf("\n");
+
+	printf("%-*s", namewidth, title);
+
+	print_iostat_labels(cb, force_column_width, iostat_bottom_labels);
+	if (cb->vcdl != NULL)
+		print_cmd_columns(cb->vcdl, 0);
+
+	printf("\n");
+
+	print_iostat_separator_impl(cb, force_column_width);
+
+	if (cb->vcdl != NULL)
+		print_cmd_columns(cb->vcdl, 1);
+
+	printf("\n");
+}
+
+static void
+print_iostat_header(iostat_cbdata_t *cb)
+{
+	print_iostat_header_impl(cb, 0, NULL);
+}
+
+
+/*
+ * Display a single statistic.
+ */
+static void
+print_one_stat(uint64_t value, enum zfs_nicenum_format format,
+    unsigned int column_size, boolean_t scripted)
+{
+	char buf[64];
+
+	zfs_nicenum_format(value, buf, sizeof (buf), format);
+
+	if (scripted)
+		printf("\t%s", buf);
+	else
+		printf("  %*s", column_size, buf);
+}
+
+/*
+ * Calculate the default vdev stats
+ *
+ * Subtract oldvs from newvs, apply a scaling factor, and save the resulting
+ * stats into calcvs.
+ */
+static void
+calc_default_iostats(vdev_stat_t *oldvs, vdev_stat_t *newvs,
+    vdev_stat_t *calcvs)
+{
+	int i;
+
+	memcpy(calcvs, newvs, sizeof (*calcvs));
+	for (i = 0; i < ARRAY_SIZE(calcvs->vs_ops); i++)
+		calcvs->vs_ops[i] = (newvs->vs_ops[i] - oldvs->vs_ops[i]);
+
+	for (i = 0; i < ARRAY_SIZE(calcvs->vs_bytes); i++)
+		calcvs->vs_bytes[i] = (newvs->vs_bytes[i] - oldvs->vs_bytes[i]);
+}
+
+/*
+ * Internal representation of the extended iostats data.
+ *
+ * The extended iostat stats are exported in nvlists as either uint64_t arrays
+ * or single uint64_t's.  We make both look like arrays to make them easier
+ * to process.  In order to make single uint64_t's look like arrays, we set
+ * __data to the stat data, and then set *data = &__data with count = 1.  Then,
+ * we can just use *data and count.
+ */
+struct stat_array {
+	uint64_t *data;
+	uint_t count;	/* Number of entries in data[] */
+	uint64_t __data; /* Only used when data is a single uint64_t */
+};
+
+static uint64_t
+stat_histo_max(struct stat_array *nva, unsigned int len)
+{
+	uint64_t max = 0;
+	int i;
+	for (i = 0; i < len; i++)
+		max = MAX(max, array64_max(nva[i].data, nva[i].count));
+
+	return (max);
+}
+
+/*
+ * Helper function to lookup a uint64_t array or uint64_t value and store its
+ * data as a stat_array.  If the nvpair is a single uint64_t value, then we make
+ * it look like a one element array to make it easier to process.
+ */
+static int
+nvpair64_to_stat_array(nvlist_t *nvl, const char *name,
+    struct stat_array *nva)
+{
+	nvpair_t *tmp;
+	int ret;
+
+	verify(nvlist_lookup_nvpair(nvl, name, &tmp) == 0);
+	switch (nvpair_type(tmp)) {
+	case DATA_TYPE_UINT64_ARRAY:
+		ret = nvpair_value_uint64_array(tmp, &nva->data, &nva->count);
+		break;
+	case DATA_TYPE_UINT64:
+		ret = nvpair_value_uint64(tmp, &nva->__data);
+		nva->data = &nva->__data;
+		nva->count = 1;
+		break;
+	default:
+		/* Not a uint64_t */
+		ret = EINVAL;
+		break;
+	}
+
+	return (ret);
+}
+
+/*
+ * Given a list of nvlist names, look up the extended stats in newnv and oldnv,
+ * subtract them, and return the results in a newly allocated stat_array.
+ * You must free the returned array after you are done with it with
+ * free_calc_stats().
+ *
+ * Additionally, you can set "oldnv" to NULL if you simply want the newnv
+ * values.
+ */
+static struct stat_array *
+calc_and_alloc_stats_ex(const char **names, unsigned int len, nvlist_t *oldnv,
+    nvlist_t *newnv)
+{
+	nvlist_t *oldnvx = NULL, *newnvx;
+	struct stat_array *oldnva, *newnva, *calcnva;
+	int i, j;
+	unsigned int alloc_size = (sizeof (struct stat_array)) * len;
+
+	/* Extract our extended stats nvlist from the main list */
+	verify(nvlist_lookup_nvlist(newnv, ZPOOL_CONFIG_VDEV_STATS_EX,
+	    &newnvx) == 0);
+	if (oldnv) {
+		verify(nvlist_lookup_nvlist(oldnv, ZPOOL_CONFIG_VDEV_STATS_EX,
+		    &oldnvx) == 0);
+	}
+
+	newnva = safe_malloc(alloc_size);
+	oldnva = safe_malloc(alloc_size);
+	calcnva = safe_malloc(alloc_size);
+
+	for (j = 0; j < len; j++) {
+		verify(nvpair64_to_stat_array(newnvx, names[j],
+		    &newnva[j]) == 0);
+		calcnva[j].count = newnva[j].count;
+		alloc_size = calcnva[j].count * sizeof (calcnva[j].data[0]);
+		calcnva[j].data = safe_malloc(alloc_size);
+		memcpy(calcnva[j].data, newnva[j].data, alloc_size);
+
+		if (oldnvx) {
+			verify(nvpair64_to_stat_array(oldnvx, names[j],
+			    &oldnva[j]) == 0);
+			for (i = 0; i < oldnva[j].count; i++)
+				calcnva[j].data[i] -= oldnva[j].data[i];
+		}
+	}
+	free(newnva);
+	free(oldnva);
+	return (calcnva);
+}
+
+static void
+free_calc_stats(struct stat_array *nva, unsigned int len)
+{
+	int i;
+	for (i = 0; i < len; i++)
+		free(nva[i].data);
+
+	free(nva);
+}
+
+static void
+print_iostat_histo(struct stat_array *nva, unsigned int len,
+    iostat_cbdata_t *cb, unsigned int column_width, unsigned int namewidth,
+    double scale)
+{
+	int i, j;
+	char buf[6];
+	uint64_t val;
+	enum zfs_nicenum_format format;
+	unsigned int buckets;
+	unsigned int start_bucket;
+
+	if (cb->cb_literal)
+		format = ZFS_NICENUM_RAW;
+	else
+		format = ZFS_NICENUM_1024;
+
+	/* All these histos are the same size, so just use nva[0].count */
+	buckets = nva[0].count;
+
+	if (cb->cb_flags & IOS_RQ_HISTO_M) {
+		/* Start at 512 - req size should never be lower than this */
+		start_bucket = 9;
+	} else {
+		start_bucket = 0;
+	}
+
+	for (j = start_bucket; j < buckets; j++) {
+		/* Print histogram bucket label */
+		if (cb->cb_flags & IOS_L_HISTO_M) {
+			/* Ending range of this bucket */
+			val = (1UL << (j + 1)) - 1;
+			zfs_nicetime(val, buf, sizeof (buf));
+		} else {
+			/* Request size (starting range of bucket) */
+			val = (1UL << j);
+			zfs_nicenum(val, buf, sizeof (buf));
+		}
+
+		if (cb->cb_scripted)
+			printf("%llu", (u_longlong_t)val);
+		else
+			printf("%-*s", namewidth, buf);
+
+		/* Print the values on the line */
+		for (i = 0; i < len; i++) {
+			print_one_stat(nva[i].data[j] * scale, format,
+			    column_width, cb->cb_scripted);
+		}
+		printf("\n");
+	}
+}
+
+static void
+print_solid_separator(unsigned int length)
+{
+	while (length--)
+		printf("-");
+	printf("\n");
+}
+
+static void
+print_iostat_histos(iostat_cbdata_t *cb, nvlist_t *oldnv,
+    nvlist_t *newnv, double scale, const char *name)
+{
+	unsigned int column_width;
+	unsigned int namewidth;
+	unsigned int entire_width;
+	enum iostat_type type;
+	struct stat_array *nva;
+	const char **names;
+	unsigned int names_len;
+
+	/* What type of histo are we? */
+	type = IOS_HISTO_IDX(cb->cb_flags);
+
+	/* Get NULL-terminated array of nvlist names for our histo */
+	names = vsx_type_to_nvlist[type];
+	names_len = str_array_len(names); /* num of names */
+
+	nva = calc_and_alloc_stats_ex(names, names_len, oldnv, newnv);
+
+	if (cb->cb_literal) {
+		column_width = MAX(5,
+		    (unsigned int) log10(stat_histo_max(nva, names_len)) + 1);
+	} else {
+		column_width = 5;
+	}
+
+	namewidth = MAX(cb->cb_namewidth,
+	    strlen(histo_to_title[IOS_HISTO_IDX(cb->cb_flags)]));
+
+	/*
+	 * Calculate the entire line width of what we're printing.  The
+	 * +2 is for the two spaces between columns:
+	 */
+	/*	 read  write				*/
+	/*	-----  -----				*/
+	/*	|___|  <---------- column_width		*/
+	/*						*/
+	/*	|__________|  <--- entire_width		*/
+	/*						*/
+	entire_width = namewidth + (column_width + 2) *
+	    label_array_len(iostat_bottom_labels[type]);
+
+	if (cb->cb_scripted)
+		printf("%s\n", name);
+	else
+		print_iostat_header_impl(cb, column_width, name);
+
+	print_iostat_histo(nva, names_len, cb, column_width,
+	    namewidth, scale);
+
+	free_calc_stats(nva, names_len);
+	if (!cb->cb_scripted)
+		print_solid_separator(entire_width);
+}
+
+/*
+ * Calculate the average latency of a power-of-two latency histogram
+ */
+static uint64_t
+single_histo_average(uint64_t *histo, unsigned int buckets)
+{
+	int i;
+	uint64_t count = 0, total = 0;
+
+	for (i = 0; i < buckets; i++) {
+		/*
+		 * Our buckets are power-of-two latency ranges.  Use the
+		 * midpoint latency of each bucket to calculate the average.
+		 * For example:
+		 *
+		 * Bucket          Midpoint
+		 * 8ns-15ns:       12ns
+		 * 16ns-31ns:      24ns
+		 * ...
+		 */
+		if (histo[i] != 0) {
+			total += histo[i] * (((1UL << i) + ((1UL << i)/2)));
+			count += histo[i];
+		}
+	}
+
+	/* Prevent divide by zero */
+	return (count == 0 ? 0 : total / count);
+}
+
+static void
+print_iostat_queues(iostat_cbdata_t *cb, nvlist_t *oldnv,
+    nvlist_t *newnv)
+{
+	int i;
+	uint64_t val;
+	const char *names[] = {
+		ZPOOL_CONFIG_VDEV_SYNC_R_PEND_QUEUE,
+		ZPOOL_CONFIG_VDEV_SYNC_R_ACTIVE_QUEUE,
+		ZPOOL_CONFIG_VDEV_SYNC_W_PEND_QUEUE,
+		ZPOOL_CONFIG_VDEV_SYNC_W_ACTIVE_QUEUE,
+		ZPOOL_CONFIG_VDEV_ASYNC_R_PEND_QUEUE,
+		ZPOOL_CONFIG_VDEV_ASYNC_R_ACTIVE_QUEUE,
+		ZPOOL_CONFIG_VDEV_ASYNC_W_PEND_QUEUE,
+		ZPOOL_CONFIG_VDEV_ASYNC_W_ACTIVE_QUEUE,
+		ZPOOL_CONFIG_VDEV_SCRUB_PEND_QUEUE,
+		ZPOOL_CONFIG_VDEV_SCRUB_ACTIVE_QUEUE,
+		ZPOOL_CONFIG_VDEV_TRIM_PEND_QUEUE,
+		ZPOOL_CONFIG_VDEV_TRIM_ACTIVE_QUEUE,
+	};
+
+	struct stat_array *nva;
+
+	unsigned int column_width = default_column_width(cb, IOS_QUEUES);
+	enum zfs_nicenum_format format;
+
+	nva = calc_and_alloc_stats_ex(names, ARRAY_SIZE(names), NULL, newnv);
+
+	if (cb->cb_literal)
+		format = ZFS_NICENUM_RAW;
+	else
+		format = ZFS_NICENUM_1024;
+
+	for (i = 0; i < ARRAY_SIZE(names); i++) {
+		val = nva[i].data[0];
+		print_one_stat(val, format, column_width, cb->cb_scripted);
+	}
+
+	free_calc_stats(nva, ARRAY_SIZE(names));
+}
+
+static void
+print_iostat_latency(iostat_cbdata_t *cb, nvlist_t *oldnv,
+    nvlist_t *newnv)
+{
+	int i;
+	uint64_t val;
+	const char *names[] = {
+		ZPOOL_CONFIG_VDEV_TOT_R_LAT_HISTO,
+		ZPOOL_CONFIG_VDEV_TOT_W_LAT_HISTO,
+		ZPOOL_CONFIG_VDEV_DISK_R_LAT_HISTO,
+		ZPOOL_CONFIG_VDEV_DISK_W_LAT_HISTO,
+		ZPOOL_CONFIG_VDEV_SYNC_R_LAT_HISTO,
+		ZPOOL_CONFIG_VDEV_SYNC_W_LAT_HISTO,
+		ZPOOL_CONFIG_VDEV_ASYNC_R_LAT_HISTO,
+		ZPOOL_CONFIG_VDEV_ASYNC_W_LAT_HISTO,
+		ZPOOL_CONFIG_VDEV_SCRUB_LAT_HISTO,
+		ZPOOL_CONFIG_VDEV_TRIM_LAT_HISTO,
+	};
+	struct stat_array *nva;
+
+	unsigned int column_width = default_column_width(cb, IOS_LATENCY);
+	enum zfs_nicenum_format format;
+
+	nva = calc_and_alloc_stats_ex(names, ARRAY_SIZE(names), oldnv, newnv);
+
+	if (cb->cb_literal)
+		format = ZFS_NICENUM_RAWTIME;
+	else
+		format = ZFS_NICENUM_TIME;
+
+	/* Print our avg latencies on the line */
+	for (i = 0; i < ARRAY_SIZE(names); i++) {
+		/* Compute average latency for a latency histo */
+		val = single_histo_average(nva[i].data, nva[i].count);
+		print_one_stat(val, format, column_width, cb->cb_scripted);
+	}
+	free_calc_stats(nva, ARRAY_SIZE(names));
+}
+
+/*
+ * Print default statistics (capacity/operations/bandwidth)
+ */
+static void
+print_iostat_default(vdev_stat_t *vs, iostat_cbdata_t *cb, double scale)
+{
+	unsigned int column_width = default_column_width(cb, IOS_DEFAULT);
+	enum zfs_nicenum_format format;
+	char na;	/* char to print for "not applicable" values */
+
+	if (cb->cb_literal) {
+		format = ZFS_NICENUM_RAW;
+		na = '0';
+	} else {
+		format = ZFS_NICENUM_1024;
+		na = '-';
+	}
+
+	/* only toplevel vdevs have capacity stats */
+	if (vs->vs_space == 0) {
+		if (cb->cb_scripted)
+			printf("\t%c\t%c", na, na);
+		else
+			printf("  %*c  %*c", column_width, na, column_width,
+			    na);
+	} else {
+		print_one_stat(vs->vs_alloc, format, column_width,
+		    cb->cb_scripted);
+		print_one_stat(vs->vs_space - vs->vs_alloc, format,
+		    column_width, cb->cb_scripted);
+	}
+
+	print_one_stat((uint64_t)(vs->vs_ops[ZIO_TYPE_READ] * scale),
+	    format, column_width, cb->cb_scripted);
+	print_one_stat((uint64_t)(vs->vs_ops[ZIO_TYPE_WRITE] * scale),
+	    format, column_width, cb->cb_scripted);
+	print_one_stat((uint64_t)(vs->vs_bytes[ZIO_TYPE_READ] * scale),
+	    format, column_width, cb->cb_scripted);
+	print_one_stat((uint64_t)(vs->vs_bytes[ZIO_TYPE_WRITE] * scale),
+	    format, column_width, cb->cb_scripted);
+}
+
+static const char *class_name[] = {
+	VDEV_ALLOC_BIAS_DEDUP,
+	VDEV_ALLOC_BIAS_SPECIAL,
+	VDEV_ALLOC_CLASS_LOGS
+};
+
+/*
+ * Print out all the statistics for the given vdev.  This can either be the
+ * toplevel configuration, or called recursively.  If 'name' is NULL, then this
+ * is a verbose output, and we don't want to display the toplevel pool stats.
+ *
+ * Returns the number of stat lines printed.
+ */
+static unsigned int
+print_vdev_stats(zpool_handle_t *zhp, const char *name, nvlist_t *oldnv,
+    nvlist_t *newnv, iostat_cbdata_t *cb, int depth)
+{
+	nvlist_t **oldchild, **newchild;
+	uint_t c, children, oldchildren;
+	vdev_stat_t *oldvs, *newvs, *calcvs;
+	vdev_stat_t zerovs = { 0 };
+	char *vname;
+	int i;
+	int ret = 0;
+	uint64_t tdelta;
+	double scale;
+
+	if (strcmp(name, VDEV_TYPE_INDIRECT) == 0)
+		return (ret);
+
+	calcvs = safe_malloc(sizeof (*calcvs));
+
+	if (oldnv != NULL) {
+		verify(nvlist_lookup_uint64_array(oldnv,
+		    ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&oldvs, &c) == 0);
+	} else {
+		oldvs = &zerovs;
+	}
+
+	/* Do we only want to see a specific vdev? */
+	for (i = 0; i < cb->cb_vdev_names_count; i++) {
+		/* Yes we do.  Is this the vdev? */
+		if (strcmp(name, cb->cb_vdev_names[i]) == 0) {
+			/*
+			 * This is our vdev.  Since it is the only vdev we
+			 * will be displaying, make depth = 0 so that it
+			 * doesn't get indented.
+			 */
+			depth = 0;
+			break;
+		}
+	}
+
+	if (cb->cb_vdev_names_count && (i == cb->cb_vdev_names_count)) {
+		/* Couldn't match the name */
+		goto children;
+	}
+
+
+	verify(nvlist_lookup_uint64_array(newnv, ZPOOL_CONFIG_VDEV_STATS,
+	    (uint64_t **)&newvs, &c) == 0);
+
+	/*
+	 * Print the vdev name unless it's is a histogram.  Histograms
+	 * display the vdev name in the header itself.
+	 */
+	if (!(cb->cb_flags & IOS_ANYHISTO_M)) {
+		if (cb->cb_scripted) {
+			printf("%s", name);
+		} else {
+			if (strlen(name) + depth > cb->cb_namewidth)
+				(void) printf("%*s%s", depth, "", name);
+			else
+				(void) printf("%*s%s%*s", depth, "", name,
+				    (int)(cb->cb_namewidth - strlen(name) -
+				    depth), "");
+		}
+	}
+
+	/* Calculate our scaling factor */
+	tdelta = newvs->vs_timestamp - oldvs->vs_timestamp;
+	if ((oldvs->vs_timestamp == 0) && (cb->cb_flags & IOS_ANYHISTO_M)) {
+		/*
+		 * If we specify printing histograms with no time interval, then
+		 * print the histogram numbers over the entire lifetime of the
+		 * vdev.
+		 */
+		scale = 1;
+	} else {
+		if (tdelta == 0)
+			scale = 1.0;
+		else
+			scale = (double)NANOSEC / tdelta;
+	}
+
+	if (cb->cb_flags & IOS_DEFAULT_M) {
+		calc_default_iostats(oldvs, newvs, calcvs);
+		print_iostat_default(calcvs, cb, scale);
+	}
+	if (cb->cb_flags & IOS_LATENCY_M)
+		print_iostat_latency(cb, oldnv, newnv);
+	if (cb->cb_flags & IOS_QUEUES_M)
+		print_iostat_queues(cb, oldnv, newnv);
+	if (cb->cb_flags & IOS_ANYHISTO_M) {
+		printf("\n");
+		print_iostat_histos(cb, oldnv, newnv, scale, name);
+	}
+
+	if (cb->vcdl != NULL) {
+		char *path;
+		if (nvlist_lookup_string(newnv, ZPOOL_CONFIG_PATH,
+		    &path) == 0) {
+			printf("  ");
+			zpool_print_cmd(cb->vcdl, zpool_get_name(zhp), path);
+		}
+	}
+
+	if (!(cb->cb_flags & IOS_ANYHISTO_M))
+		printf("\n");
+
+	ret++;
+
+children:
+
+	free(calcvs);
+
+	if (!cb->cb_verbose)
+		return (ret);
+
+	if (nvlist_lookup_nvlist_array(newnv, ZPOOL_CONFIG_CHILDREN,
+	    &newchild, &children) != 0)
+		return (ret);
+
+	if (oldnv) {
+		if (nvlist_lookup_nvlist_array(oldnv, ZPOOL_CONFIG_CHILDREN,
+		    &oldchild, &oldchildren) != 0)
+			return (ret);
+
+		children = MIN(oldchildren, children);
+	}
+
+	/*
+	 * print normal top-level devices
+	 */
+	for (c = 0; c < children; c++) {
+		uint64_t ishole = B_FALSE, islog = B_FALSE;
+
+		(void) nvlist_lookup_uint64(newchild[c], ZPOOL_CONFIG_IS_HOLE,
+		    &ishole);
+
+		(void) nvlist_lookup_uint64(newchild[c], ZPOOL_CONFIG_IS_LOG,
+		    &islog);
+
+		if (ishole || islog)
+			continue;
+
+		if (nvlist_exists(newchild[c], ZPOOL_CONFIG_ALLOCATION_BIAS))
+			continue;
+
+		vname = zpool_vdev_name(g_zfs, zhp, newchild[c],
+		    cb->cb_name_flags);
+		ret += print_vdev_stats(zhp, vname, oldnv ? oldchild[c] : NULL,
+		    newchild[c], cb, depth + 2);
+		free(vname);
+	}
+
+	/*
+	 * print all other top-level devices
+	 */
+	for (uint_t n = 0; n < 3; n++) {
+		boolean_t printed = B_FALSE;
+
+		for (c = 0; c < children; c++) {
+			uint64_t islog = B_FALSE;
+			char *bias = NULL;
+			char *type = NULL;
+
+			(void) nvlist_lookup_uint64(newchild[c],
+			    ZPOOL_CONFIG_IS_LOG, &islog);
+			if (islog) {
+				bias = VDEV_ALLOC_CLASS_LOGS;
+			} else {
+				(void) nvlist_lookup_string(newchild[c],
+				    ZPOOL_CONFIG_ALLOCATION_BIAS, &bias);
+				(void) nvlist_lookup_string(newchild[c],
+				    ZPOOL_CONFIG_TYPE, &type);
+			}
+			if (bias == NULL || strcmp(bias, class_name[n]) != 0)
+				continue;
+			if (!islog && strcmp(type, VDEV_TYPE_INDIRECT) == 0)
+				continue;
+
+			if (!printed) {
+				if ((!(cb->cb_flags & IOS_ANYHISTO_M)) &&
+				    !cb->cb_scripted && !cb->cb_vdev_names) {
+					print_iostat_dashes(cb, 0,
+					    class_name[n]);
+				}
+				printf("\n");
+				printed = B_TRUE;
+			}
+
+			vname = zpool_vdev_name(g_zfs, zhp, newchild[c],
+			    cb->cb_name_flags);
+			ret += print_vdev_stats(zhp, vname, oldnv ?
+			    oldchild[c] : NULL, newchild[c], cb, depth + 2);
+			free(vname);
+		}
+	}
+
+	/*
+	 * Include level 2 ARC devices in iostat output
+	 */
+	if (nvlist_lookup_nvlist_array(newnv, ZPOOL_CONFIG_L2CACHE,
+	    &newchild, &children) != 0)
+		return (ret);
+
+	if (oldnv) {
+		if (nvlist_lookup_nvlist_array(oldnv, ZPOOL_CONFIG_L2CACHE,
+		    &oldchild, &oldchildren) != 0)
+			return (ret);
+
+		children = MIN(oldchildren, children);
+	}
+
+	if (children > 0) {
+		if ((!(cb->cb_flags & IOS_ANYHISTO_M)) && !cb->cb_scripted &&
+		    !cb->cb_vdev_names) {
+			print_iostat_dashes(cb, 0, "cache");
+		}
+		printf("\n");
+
+		for (c = 0; c < children; c++) {
+			vname = zpool_vdev_name(g_zfs, zhp, newchild[c],
+			    cb->cb_name_flags);
+			ret += print_vdev_stats(zhp, vname, oldnv ? oldchild[c]
+			    : NULL, newchild[c], cb, depth + 2);
+			free(vname);
+		}
+	}
+
+	return (ret);
+}
+
+static int
+refresh_iostat(zpool_handle_t *zhp, void *data)
+{
+	iostat_cbdata_t *cb = data;
+	boolean_t missing;
+
+	/*
+	 * If the pool has disappeared, remove it from the list and continue.
+	 */
+	if (zpool_refresh_stats(zhp, &missing) != 0)
+		return (-1);
+
+	if (missing)
+		pool_list_remove(cb->cb_list, zhp);
+
+	return (0);
+}
+
+/*
+ * Callback to print out the iostats for the given pool.
+ */
+static int
+print_iostat(zpool_handle_t *zhp, void *data)
+{
+	iostat_cbdata_t *cb = data;
+	nvlist_t *oldconfig, *newconfig;
+	nvlist_t *oldnvroot, *newnvroot;
+	int ret;
+
+	newconfig = zpool_get_config(zhp, &oldconfig);
+
+	if (cb->cb_iteration == 1)
+		oldconfig = NULL;
+
+	verify(nvlist_lookup_nvlist(newconfig, ZPOOL_CONFIG_VDEV_TREE,
+	    &newnvroot) == 0);
+
+	if (oldconfig == NULL)
+		oldnvroot = NULL;
+	else
+		verify(nvlist_lookup_nvlist(oldconfig, ZPOOL_CONFIG_VDEV_TREE,
+		    &oldnvroot) == 0);
+
+	ret = print_vdev_stats(zhp, zpool_get_name(zhp), oldnvroot, newnvroot,
+	    cb, 0);
+	if ((ret != 0) && !(cb->cb_flags & IOS_ANYHISTO_M) &&
+	    !cb->cb_scripted && cb->cb_verbose && !cb->cb_vdev_names_count) {
+		print_iostat_separator(cb);
+		if (cb->vcdl != NULL) {
+			print_cmd_columns(cb->vcdl, 1);
+		}
+		printf("\n");
+	}
+
+	return (ret);
+}
+
+static int
+get_columns(void)
+{
+	struct winsize ws;
+	int columns = 80;
+	int error;
+
+	if (isatty(STDOUT_FILENO)) {
+		error = ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws);
+		if (error == 0)
+			columns = ws.ws_col;
+	} else {
+		columns = 999;
+	}
+
+	return (columns);
+}
+
+/*
+ * Return the required length of the pool/vdev name column.  The minimum
+ * allowed width and output formatting flags must be provided.
+ */
+static int
+get_namewidth(zpool_handle_t *zhp, int min_width, int flags, boolean_t verbose)
+{
+	nvlist_t *config, *nvroot;
+	int width = min_width;
+
+	if ((config = zpool_get_config(zhp, NULL)) != NULL) {
+		verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+		    &nvroot) == 0);
+		unsigned int poolname_len = strlen(zpool_get_name(zhp));
+		if (verbose == B_FALSE) {
+			width = MAX(poolname_len, min_width);
+		} else {
+			width = MAX(poolname_len,
+			    max_width(zhp, nvroot, 0, min_width, flags));
+		}
+	}
+
+	return (width);
+}
+
+/*
+ * Parse the input string, get the 'interval' and 'count' value if there is one.
+ */
+static void
+get_interval_count(int *argcp, char **argv, float *iv,
+    unsigned long *cnt)
+{
+	float interval = 0;
+	unsigned long count = 0;
+	int argc = *argcp;
+
+	/*
+	 * Determine if the last argument is an integer or a pool name
+	 */
+	if (argc > 0 && zfs_isnumber(argv[argc - 1])) {
+		char *end;
+
+		errno = 0;
+		interval = strtof(argv[argc - 1], &end);
+
+		if (*end == '\0' && errno == 0) {
+			if (interval == 0) {
+				(void) fprintf(stderr, gettext("interval "
+				    "cannot be zero\n"));
+				usage(B_FALSE);
+			}
+			/*
+			 * Ignore the last parameter
+			 */
+			argc--;
+		} else {
+			/*
+			 * If this is not a valid number, just plow on.  The
+			 * user will get a more informative error message later
+			 * on.
+			 */
+			interval = 0;
+		}
+	}
+
+	/*
+	 * If the last argument is also an integer, then we have both a count
+	 * and an interval.
+	 */
+	if (argc > 0 && zfs_isnumber(argv[argc - 1])) {
+		char *end;
+
+		errno = 0;
+		count = interval;
+		interval = strtof(argv[argc - 1], &end);
+
+		if (*end == '\0' && errno == 0) {
+			if (interval == 0) {
+				(void) fprintf(stderr, gettext("interval "
+				    "cannot be zero\n"));
+				usage(B_FALSE);
+			}
+
+			/*
+			 * Ignore the last parameter
+			 */
+			argc--;
+		} else {
+			interval = 0;
+		}
+	}
+
+	*iv = interval;
+	*cnt = count;
+	*argcp = argc;
+}
+
+static void
+get_timestamp_arg(char c)
+{
+	if (c == 'u')
+		timestamp_fmt = UDATE;
+	else if (c == 'd')
+		timestamp_fmt = DDATE;
+	else
+		usage(B_FALSE);
+}
+
+/*
+ * Return stat flags that are supported by all pools by both the module and
+ * zpool iostat.  "*data" should be initialized to all 0xFFs before running.
+ * It will get ANDed down until only the flags that are supported on all pools
+ * remain.
+ */
+static int
+get_stat_flags_cb(zpool_handle_t *zhp, void *data)
+{
+	uint64_t *mask = data;
+	nvlist_t *config, *nvroot, *nvx;
+	uint64_t flags = 0;
+	int i, j;
+
+	config = zpool_get_config(zhp, NULL);
+	verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+	    &nvroot) == 0);
+
+	/* Default stats are always supported, but for completeness.. */
+	if (nvlist_exists(nvroot, ZPOOL_CONFIG_VDEV_STATS))
+		flags |= IOS_DEFAULT_M;
+
+	/* Get our extended stats nvlist from the main list */
+	if (nvlist_lookup_nvlist(nvroot, ZPOOL_CONFIG_VDEV_STATS_EX,
+	    &nvx) != 0) {
+		/*
+		 * No extended stats; they're probably running an older
+		 * module.  No big deal, we support that too.
+		 */
+		goto end;
+	}
+
+	/* For each extended stat, make sure all its nvpairs are supported */
+	for (j = 0; j < ARRAY_SIZE(vsx_type_to_nvlist); j++) {
+		if (!vsx_type_to_nvlist[j][0])
+			continue;
+
+		/* Start off by assuming the flag is supported, then check */
+		flags |= (1ULL << j);
+		for (i = 0; vsx_type_to_nvlist[j][i]; i++) {
+			if (!nvlist_exists(nvx, vsx_type_to_nvlist[j][i])) {
+				/* flag isn't supported */
+				flags = flags & ~(1ULL  << j);
+				break;
+			}
+		}
+	}
+end:
+	*mask = *mask & flags;
+	return (0);
+}
+
+/*
+ * Return a bitmask of stats that are supported on all pools by both the module
+ * and zpool iostat.
+ */
+static uint64_t
+get_stat_flags(zpool_list_t *list)
+{
+	uint64_t mask = -1;
+
+	/*
+	 * get_stat_flags_cb() will lop off bits from "mask" until only the
+	 * flags that are supported on all pools remain.
+	 */
+	pool_list_iter(list, B_FALSE, get_stat_flags_cb, &mask);
+	return (mask);
+}
+
+/*
+ * Return 1 if cb_data->cb_vdev_names[0] is this vdev's name, 0 otherwise.
+ */
+static int
+is_vdev_cb(zpool_handle_t *zhp, nvlist_t *nv, void *cb_data)
+{
+	iostat_cbdata_t *cb = cb_data;
+	char *name = NULL;
+	int ret = 0;
+
+	name = zpool_vdev_name(g_zfs, zhp, nv, cb->cb_name_flags);
+
+	if (strcmp(name, cb->cb_vdev_names[0]) == 0)
+		ret = 1; /* match */
+	free(name);
+
+	return (ret);
+}
+
+/*
+ * Returns 1 if cb_data->cb_vdev_names[0] is a vdev name, 0 otherwise.
+ */
+static int
+is_vdev(zpool_handle_t *zhp, void *cb_data)
+{
+	return (for_each_vdev(zhp, is_vdev_cb, cb_data));
+}
+
+/*
+ * Check if vdevs are in a pool
+ *
+ * Return 1 if all argv[] strings are vdev names in pool "pool_name". Otherwise
+ * return 0.  If pool_name is NULL, then search all pools.
+ */
+static int
+are_vdevs_in_pool(int argc, char **argv, char *pool_name,
+    iostat_cbdata_t *cb)
+{
+	char **tmp_name;
+	int ret = 0;
+	int i;
+	int pool_count = 0;
+
+	if ((argc == 0) || !*argv)
+		return (0);
+
+	if (pool_name)
+		pool_count = 1;
+
+	/* Temporarily hijack cb_vdev_names for a second... */
+	tmp_name = cb->cb_vdev_names;
+
+	/* Go though our list of prospective vdev names */
+	for (i = 0; i < argc; i++) {
+		cb->cb_vdev_names = argv + i;
+
+		/* Is this name a vdev in our pools? */
+		ret = for_each_pool(pool_count, &pool_name, B_TRUE, NULL,
+		    is_vdev, cb);
+		if (!ret) {
+			/* No match */
+			break;
+		}
+	}
+
+	cb->cb_vdev_names = tmp_name;
+
+	return (ret);
+}
+
+static int
+is_pool_cb(zpool_handle_t *zhp, void *data)
+{
+	char *name = data;
+	if (strcmp(name, zpool_get_name(zhp)) == 0)
+		return (1);
+
+	return (0);
+}
+
+/*
+ * Do we have a pool named *name?  If so, return 1, otherwise 0.
+ */
+static int
+is_pool(char *name)
+{
+	return (for_each_pool(0, NULL, B_TRUE, NULL,  is_pool_cb, name));
+}
+
+/* Are all our argv[] strings pool names?  If so return 1, 0 otherwise. */
+static int
+are_all_pools(int argc, char **argv)
+{
+	if ((argc == 0) || !*argv)
+		return (0);
+
+	while (--argc >= 0)
+		if (!is_pool(argv[argc]))
+			return (0);
+
+	return (1);
+}
+
+/*
+ * Helper function to print out vdev/pool names we can't resolve.  Used for an
+ * error message.
+ */
+static void
+error_list_unresolved_vdevs(int argc, char **argv, char *pool_name,
+    iostat_cbdata_t *cb)
+{
+	int i;
+	char *name;
+	char *str;
+	for (i = 0; i < argc; i++) {
+		name = argv[i];
+
+		if (is_pool(name))
+			str = gettext("pool");
+		else if (are_vdevs_in_pool(1, &name, pool_name, cb))
+			str = gettext("vdev in this pool");
+		else if (are_vdevs_in_pool(1, &name, NULL, cb))
+			str = gettext("vdev in another pool");
+		else
+			str = gettext("unknown");
+
+		fprintf(stderr, "\t%s (%s)\n", name, str);
+	}
+}
+
+/*
+ * Same as get_interval_count(), but with additional checks to not misinterpret
+ * guids as interval/count values.  Assumes VDEV_NAME_GUID is set in
+ * cb.cb_name_flags.
+ */
+static void
+get_interval_count_filter_guids(int *argc, char **argv, float *interval,
+    unsigned long *count, iostat_cbdata_t *cb)
+{
+	char **tmpargv = argv;
+	int argc_for_interval = 0;
+
+	/* Is the last arg an interval value?  Or a guid? */
+	if (*argc >= 1 && !are_vdevs_in_pool(1, &argv[*argc - 1], NULL, cb)) {
+		/*
+		 * The last arg is not a guid, so it's probably an
+		 * interval value.
+		 */
+		argc_for_interval++;
+
+		if (*argc >= 2 &&
+		    !are_vdevs_in_pool(1, &argv[*argc - 2], NULL, cb)) {
+			/*
+			 * The 2nd to last arg is not a guid, so it's probably
+			 * an interval value.
+			 */
+			argc_for_interval++;
+		}
+	}
+
+	/* Point to our list of possible intervals */
+	tmpargv = &argv[*argc - argc_for_interval];
+
+	*argc = *argc - argc_for_interval;
+	get_interval_count(&argc_for_interval, tmpargv,
+	    interval, count);
+}
+
+/*
+ * Floating point sleep().  Allows you to pass in a floating point value for
+ * seconds.
+ */
+static void
+fsleep(float sec)
+{
+	struct timespec req;
+	req.tv_sec = floor(sec);
+	req.tv_nsec = (sec - (float)req.tv_sec) * NANOSEC;
+	nanosleep(&req, NULL);
+}
+
+/*
+ * Terminal height, in rows. Returns -1 if stdout is not connected to a TTY or
+ * if we were unable to determine its size.
+ */
+static int
+terminal_height(void)
+{
+	struct winsize win;
+
+	if (isatty(STDOUT_FILENO) == 0)
+		return (-1);
+
+	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) != -1 && win.ws_row > 0)
+		return (win.ws_row);
+
+	return (-1);
+}
+
+/*
+ * Run one of the zpool status/iostat -c scripts with the help (-h) option and
+ * print the result.
+ *
+ * name:	Short name of the script ('iostat').
+ * path:	Full path to the script ('/usr/local/etc/zfs/zpool.d/iostat');
+ */
+static void
+print_zpool_script_help(char *name, char *path)
+{
+	char *argv[] = {path, "-h", NULL};
+	char **lines = NULL;
+	int lines_cnt = 0;
+	int rc;
+
+	rc = libzfs_run_process_get_stdout_nopath(path, argv, NULL, &lines,
+	    &lines_cnt);
+	if (rc != 0 || lines == NULL || lines_cnt <= 0) {
+		if (lines != NULL)
+			libzfs_free_str_array(lines, lines_cnt);
+		return;
+	}
+
+	for (int i = 0; i < lines_cnt; i++)
+		if (!is_blank_str(lines[i]))
+			printf("  %-14s  %s\n", name, lines[i]);
+
+	libzfs_free_str_array(lines, lines_cnt);
+}
+
+/*
+ * Go though the zpool status/iostat -c scripts in the user's path, run their
+ * help option (-h), and print out the results.
+ */
+static void
+print_zpool_dir_scripts(char *dirpath)
+{
+	DIR *dir;
+	struct dirent *ent;
+	char fullpath[MAXPATHLEN];
+	struct stat dir_stat;
+
+	if ((dir = opendir(dirpath)) != NULL) {
+		/* print all the files and directories within directory */
+		while ((ent = readdir(dir)) != NULL) {
+			sprintf(fullpath, "%s/%s", dirpath, ent->d_name);
+
+			/* Print the scripts */
+			if (stat(fullpath, &dir_stat) == 0)
+				if (dir_stat.st_mode & S_IXUSR &&
+				    S_ISREG(dir_stat.st_mode))
+					print_zpool_script_help(ent->d_name,
+					    fullpath);
+		}
+		closedir(dir);
+	}
+}
+
+/*
+ * Print out help text for all zpool status/iostat -c scripts.
+ */
+static void
+print_zpool_script_list(char *subcommand)
+{
+	char *dir, *sp;
+
+	printf(gettext("Available 'zpool %s -c' commands:\n"), subcommand);
+
+	sp = zpool_get_cmd_search_path();
+	if (sp == NULL)
+		return;
+
+	dir = strtok(sp, ":");
+	while (dir != NULL) {
+		print_zpool_dir_scripts(dir);
+		dir = strtok(NULL, ":");
+	}
+
+	free(sp);
+}
+
+/*
+ * Set the minimum pool/vdev name column width.  The width must be at least 10,
+ * but may be as large as the column width - 42 so it still fits on one line.
+ * NOTE: 42 is the width of the default capacity/operations/bandwidth output
+ */
+static int
+get_namewidth_iostat(zpool_handle_t *zhp, void *data)
+{
+	iostat_cbdata_t *cb = data;
+	int width, available_width;
+
+	/*
+	 * get_namewidth() returns the maximum width of any name in that column
+	 * for any pool/vdev/device line that will be output.
+	 */
+	width = get_namewidth(zhp, cb->cb_namewidth, cb->cb_name_flags,
+	    cb->cb_verbose);
+
+	/*
+	 * The width we are calculating is the width of the header and also the
+	 * padding width for names that are less than maximum width.  The stats
+	 * take up 42 characters, so the width available for names is:
+	 */
+	available_width = get_columns() - 42;
+
+	/*
+	 * If the maximum width fits on a screen, then great!  Make everything
+	 * line up by justifying all lines to the same width.  If that max
+	 * width is larger than what's available, the name plus stats won't fit
+	 * on one line, and justifying to that width would cause every line to
+	 * wrap on the screen.  We only want lines with long names to wrap.
+	 * Limit the padding to what won't wrap.
+	 */
+	if (width > available_width)
+		width = available_width;
+
+	/*
+	 * And regardless of whatever the screen width is (get_columns can
+	 * return 0 if the width is not known or less than 42 for a narrow
+	 * terminal) have the width be a minimum of 10.
+	 */
+	if (width < 10)
+		width = 10;
+
+	/* Save the calculated width */
+	cb->cb_namewidth = width;
+
+	return (0);
+}
+
+/*
+ * zpool iostat [[-c [script1,script2,...]] [-lq]|[-rw]] [-ghHLpPvy] [-n name]
+ *              [-T d|u] [[ pool ...]|[pool vdev ...]|[vdev ...]]
+ *              [interval [count]]
+ *
+ *	-c CMD  For each vdev, run command CMD
+ *	-g	Display guid for individual vdev name.
+ *	-L	Follow links when resolving vdev path name.
+ *	-P	Display full path for vdev name.
+ *	-v	Display statistics for individual vdevs
+ *	-h	Display help
+ *	-p	Display values in parsable (exact) format.
+ *	-H	Scripted mode.  Don't display headers, and separate properties
+ *		by a single tab.
+ *	-l	Display average latency
+ *	-q	Display queue depths
+ *	-w	Display latency histograms
+ *	-r	Display request size histogram
+ *	-T	Display a timestamp in date(1) or Unix format
+ *	-n	Only print headers once
+ *
+ * This command can be tricky because we want to be able to deal with pool
+ * creation/destruction as well as vdev configuration changes.  The bulk of this
+ * processing is handled by the pool_list_* routines in zpool_iter.c.  We rely
+ * on pool_list_update() to detect the addition of new pools.  Configuration
+ * changes are all handled within libzfs.
+ */
+int
+zpool_do_iostat(int argc, char **argv)
+{
+	int c;
+	int ret;
+	int npools;
+	float interval = 0;
+	unsigned long count = 0;
+	int winheight = 24;
+	zpool_list_t *list;
+	boolean_t verbose = B_FALSE;
+	boolean_t latency = B_FALSE, l_histo = B_FALSE, rq_histo = B_FALSE;
+	boolean_t queues = B_FALSE, parsable = B_FALSE, scripted = B_FALSE;
+	boolean_t omit_since_boot = B_FALSE;
+	boolean_t guid = B_FALSE;
+	boolean_t follow_links = B_FALSE;
+	boolean_t full_name = B_FALSE;
+	boolean_t headers_once = B_FALSE;
+	iostat_cbdata_t cb = { 0 };
+	char *cmd = NULL;
+
+	/* Used for printing error message */
+	const char flag_to_arg[] = {[IOS_LATENCY] = 'l', [IOS_QUEUES] = 'q',
+	    [IOS_L_HISTO] = 'w', [IOS_RQ_HISTO] = 'r'};
+
+	uint64_t unsupported_flags;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "c:gLPT:vyhplqrwnH")) != -1) {
+		switch (c) {
+		case 'c':
+			if (cmd != NULL) {
+				fprintf(stderr,
+				    gettext("Can't set -c flag twice\n"));
+				exit(1);
+			}
+
+			if (getenv("ZPOOL_SCRIPTS_ENABLED") != NULL &&
+			    !libzfs_envvar_is_set("ZPOOL_SCRIPTS_ENABLED")) {
+				fprintf(stderr, gettext(
+				    "Can't run -c, disabled by "
+				    "ZPOOL_SCRIPTS_ENABLED.\n"));
+				exit(1);
+			}
+
+			if ((getuid() <= 0 || geteuid() <= 0) &&
+			    !libzfs_envvar_is_set("ZPOOL_SCRIPTS_AS_ROOT")) {
+				fprintf(stderr, gettext(
+				    "Can't run -c with root privileges "
+				    "unless ZPOOL_SCRIPTS_AS_ROOT is set.\n"));
+				exit(1);
+			}
+			cmd = optarg;
+			verbose = B_TRUE;
+			break;
+		case 'g':
+			guid = B_TRUE;
+			break;
+		case 'L':
+			follow_links = B_TRUE;
+			break;
+		case 'P':
+			full_name = B_TRUE;
+			break;
+		case 'T':
+			get_timestamp_arg(*optarg);
+			break;
+		case 'v':
+			verbose = B_TRUE;
+			break;
+		case 'p':
+			parsable = B_TRUE;
+			break;
+		case 'l':
+			latency = B_TRUE;
+			break;
+		case 'q':
+			queues = B_TRUE;
+			break;
+		case 'H':
+			scripted = B_TRUE;
+			break;
+		case 'w':
+			l_histo = B_TRUE;
+			break;
+		case 'r':
+			rq_histo = B_TRUE;
+			break;
+		case 'y':
+			omit_since_boot = B_TRUE;
+			break;
+		case 'n':
+			headers_once = B_TRUE;
+			break;
+		case 'h':
+			usage(B_FALSE);
+			break;
+		case '?':
+			if (optopt == 'c') {
+				print_zpool_script_list("iostat");
+				exit(0);
+			} else {
+				fprintf(stderr,
+				    gettext("invalid option '%c'\n"), optopt);
+			}
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	cb.cb_literal = parsable;
+	cb.cb_scripted = scripted;
+
+	if (guid)
+		cb.cb_name_flags |= VDEV_NAME_GUID;
+	if (follow_links)
+		cb.cb_name_flags |= VDEV_NAME_FOLLOW_LINKS;
+	if (full_name)
+		cb.cb_name_flags |= VDEV_NAME_PATH;
+	cb.cb_iteration = 0;
+	cb.cb_namewidth = 0;
+	cb.cb_verbose = verbose;
+
+	/* Get our interval and count values (if any) */
+	if (guid) {
+		get_interval_count_filter_guids(&argc, argv, &interval,
+		    &count, &cb);
+	} else {
+		get_interval_count(&argc, argv, &interval, &count);
+	}
+
+	if (argc == 0) {
+		/* No args, so just print the defaults. */
+	} else if (are_all_pools(argc, argv)) {
+		/* All the args are pool names */
+	} else if (are_vdevs_in_pool(argc, argv, NULL, &cb)) {
+		/* All the args are vdevs */
+		cb.cb_vdev_names = argv;
+		cb.cb_vdev_names_count = argc;
+		argc = 0; /* No pools to process */
+	} else if (are_all_pools(1, argv)) {
+		/* The first arg is a pool name */
+		if (are_vdevs_in_pool(argc - 1, argv + 1, argv[0], &cb)) {
+			/* ...and the rest are vdev names */
+			cb.cb_vdev_names = argv + 1;
+			cb.cb_vdev_names_count = argc - 1;
+			argc = 1; /* One pool to process */
+		} else {
+			fprintf(stderr, gettext("Expected either a list of "));
+			fprintf(stderr, gettext("pools, or list of vdevs in"));
+			fprintf(stderr, " \"%s\", ", argv[0]);
+			fprintf(stderr, gettext("but got:\n"));
+			error_list_unresolved_vdevs(argc - 1, argv + 1,
+			    argv[0], &cb);
+			fprintf(stderr, "\n");
+			usage(B_FALSE);
+			return (1);
+		}
+	} else {
+		/*
+		 * The args don't make sense. The first arg isn't a pool name,
+		 * nor are all the args vdevs.
+		 */
+		fprintf(stderr, gettext("Unable to parse pools/vdevs list.\n"));
+		fprintf(stderr, "\n");
+		return (1);
+	}
+
+	if (cb.cb_vdev_names_count != 0) {
+		/*
+		 * If user specified vdevs, it implies verbose.
+		 */
+		cb.cb_verbose = B_TRUE;
+	}
+
+	/*
+	 * Construct the list of all interesting pools.
+	 */
+	ret = 0;
+	if ((list = pool_list_get(argc, argv, NULL, &ret)) == NULL)
+		return (1);
+
+	if (pool_list_count(list) == 0 && argc != 0) {
+		pool_list_free(list);
+		return (1);
+	}
+
+	if (pool_list_count(list) == 0 && interval == 0) {
+		pool_list_free(list);
+		(void) fprintf(stderr, gettext("no pools available\n"));
+		return (1);
+	}
+
+	if ((l_histo || rq_histo) && (cmd != NULL || latency || queues)) {
+		pool_list_free(list);
+		(void) fprintf(stderr,
+		    gettext("[-r|-w] isn't allowed with [-c|-l|-q]\n"));
+		usage(B_FALSE);
+		return (1);
+	}
+
+	if (l_histo && rq_histo) {
+		pool_list_free(list);
+		(void) fprintf(stderr,
+		    gettext("Only one of [-r|-w] can be passed at a time\n"));
+		usage(B_FALSE);
+		return (1);
+	}
+
+	/*
+	 * Enter the main iostat loop.
+	 */
+	cb.cb_list = list;
+
+	if (l_histo) {
+		/*
+		 * Histograms tables look out of place when you try to display
+		 * them with the other stats, so make a rule that you can only
+		 * print histograms by themselves.
+		 */
+		cb.cb_flags = IOS_L_HISTO_M;
+	} else if (rq_histo) {
+		cb.cb_flags = IOS_RQ_HISTO_M;
+	} else {
+		cb.cb_flags = IOS_DEFAULT_M;
+		if (latency)
+			cb.cb_flags |= IOS_LATENCY_M;
+		if (queues)
+			cb.cb_flags |= IOS_QUEUES_M;
+	}
+
+	/*
+	 * See if the module supports all the stats we want to display.
+	 */
+	unsupported_flags = cb.cb_flags & ~get_stat_flags(list);
+	if (unsupported_flags) {
+		uint64_t f;
+		int idx;
+		fprintf(stderr,
+		    gettext("The loaded zfs module doesn't support:"));
+
+		/* for each bit set in unsupported_flags */
+		for (f = unsupported_flags; f; f &= ~(1ULL << idx)) {
+			idx = lowbit64(f) - 1;
+			fprintf(stderr, " -%c", flag_to_arg[idx]);
+		}
+
+		fprintf(stderr, ".  Try running a newer module.\n");
+		pool_list_free(list);
+
+		return (1);
+	}
+
+	for (;;) {
+		if ((npools = pool_list_count(list)) == 0)
+			(void) fprintf(stderr, gettext("no pools available\n"));
+		else {
+			/*
+			 * If this is the first iteration and -y was supplied
+			 * we skip any printing.
+			 */
+			boolean_t skip = (omit_since_boot &&
+			    cb.cb_iteration == 0);
+
+			/*
+			 * Refresh all statistics.  This is done as an
+			 * explicit step before calculating the maximum name
+			 * width, so that any * configuration changes are
+			 * properly accounted for.
+			 */
+			(void) pool_list_iter(list, B_FALSE, refresh_iostat,
+			    &cb);
+
+			/*
+			 * Iterate over all pools to determine the maximum width
+			 * for the pool / device name column across all pools.
+			 */
+			cb.cb_namewidth = 0;
+			(void) pool_list_iter(list, B_FALSE,
+			    get_namewidth_iostat, &cb);
+
+			if (timestamp_fmt != NODATE)
+				print_timestamp(timestamp_fmt);
+
+			if (cmd != NULL && cb.cb_verbose &&
+			    !(cb.cb_flags & IOS_ANYHISTO_M)) {
+				cb.vcdl = all_pools_for_each_vdev_run(argc,
+				    argv, cmd, g_zfs, cb.cb_vdev_names,
+				    cb.cb_vdev_names_count, cb.cb_name_flags);
+			} else {
+				cb.vcdl = NULL;
+			}
+
+
+			/*
+			 * Check terminal size so we can print headers
+			 * even when terminal window has its height
+			 * changed.
+			 */
+			winheight = terminal_height();
+			/*
+			 * Are we connected to TTY? If not, headers_once
+			 * should be true, to avoid breaking scripts.
+			 */
+			if (winheight < 0)
+				headers_once = B_TRUE;
+
+			/*
+			 * If it's the first time and we're not skipping it,
+			 * or either skip or verbose mode, print the header.
+			 *
+			 * The histogram code explicitly prints its header on
+			 * every vdev, so skip this for histograms.
+			 */
+			if (((++cb.cb_iteration == 1 && !skip) ||
+			    (skip != verbose) ||
+			    (!headers_once &&
+			    (cb.cb_iteration % winheight) == 0)) &&
+			    (!(cb.cb_flags & IOS_ANYHISTO_M)) &&
+			    !cb.cb_scripted)
+				print_iostat_header(&cb);
+
+			if (skip) {
+				(void) fsleep(interval);
+				continue;
+			}
+
+			pool_list_iter(list, B_FALSE, print_iostat, &cb);
+
+			/*
+			 * If there's more than one pool, and we're not in
+			 * verbose mode (which prints a separator for us),
+			 * then print a separator.
+			 *
+			 * In addition, if we're printing specific vdevs then
+			 * we also want an ending separator.
+			 */
+			if (((npools > 1 && !verbose &&
+			    !(cb.cb_flags & IOS_ANYHISTO_M)) ||
+			    (!(cb.cb_flags & IOS_ANYHISTO_M) &&
+			    cb.cb_vdev_names_count)) &&
+			    !cb.cb_scripted) {
+				print_iostat_separator(&cb);
+				if (cb.vcdl != NULL)
+					print_cmd_columns(cb.vcdl, 1);
+				printf("\n");
+			}
+
+			if (cb.vcdl != NULL)
+				free_vdev_cmd_data_list(cb.vcdl);
+
+		}
+
+		/*
+		 * Flush the output so that redirection to a file isn't buffered
+		 * indefinitely.
+		 */
+		(void) fflush(stdout);
+
+		if (interval == 0)
+			break;
+
+		if (count != 0 && --count == 0)
+			break;
+
+		(void) fsleep(interval);
+	}
+
+	pool_list_free(list);
+
+	return (ret);
+}
+
+typedef struct list_cbdata {
+	boolean_t	cb_verbose;
+	int		cb_name_flags;
+	int		cb_namewidth;
+	boolean_t	cb_scripted;
+	zprop_list_t	*cb_proplist;
+	boolean_t	cb_literal;
+} list_cbdata_t;
+
+
+/*
+ * Given a list of columns to display, output appropriate headers for each one.
+ */
+static void
+print_header(list_cbdata_t *cb)
+{
+	zprop_list_t *pl = cb->cb_proplist;
+	char headerbuf[ZPOOL_MAXPROPLEN];
+	const char *header;
+	boolean_t first = B_TRUE;
+	boolean_t right_justify;
+	size_t width = 0;
+
+	for (; pl != NULL; pl = pl->pl_next) {
+		width = pl->pl_width;
+		if (first && cb->cb_verbose) {
+			/*
+			 * Reset the width to accommodate the verbose listing
+			 * of devices.
+			 */
+			width = cb->cb_namewidth;
+		}
+
+		if (!first)
+			(void) printf("  ");
+		else
+			first = B_FALSE;
+
+		right_justify = B_FALSE;
+		if (pl->pl_prop != ZPROP_INVAL) {
+			header = zpool_prop_column_name(pl->pl_prop);
+			right_justify = zpool_prop_align_right(pl->pl_prop);
+		} else {
+			int i;
+
+			for (i = 0; pl->pl_user_prop[i] != '\0'; i++)
+				headerbuf[i] = toupper(pl->pl_user_prop[i]);
+			headerbuf[i] = '\0';
+			header = headerbuf;
+		}
+
+		if (pl->pl_next == NULL && !right_justify)
+			(void) printf("%s", header);
+		else if (right_justify)
+			(void) printf("%*s", (int)width, header);
+		else
+			(void) printf("%-*s", (int)width, header);
+	}
+
+	(void) printf("\n");
+}
+
+/*
+ * Given a pool and a list of properties, print out all the properties according
+ * to the described layout. Used by zpool_do_list().
+ */
+static void
+print_pool(zpool_handle_t *zhp, list_cbdata_t *cb)
+{
+	zprop_list_t *pl = cb->cb_proplist;
+	boolean_t first = B_TRUE;
+	char property[ZPOOL_MAXPROPLEN];
+	char *propstr;
+	boolean_t right_justify;
+	size_t width;
+
+	for (; pl != NULL; pl = pl->pl_next) {
+
+		width = pl->pl_width;
+		if (first && cb->cb_verbose) {
+			/*
+			 * Reset the width to accommodate the verbose listing
+			 * of devices.
+			 */
+			width = cb->cb_namewidth;
+		}
+
+		if (!first) {
+			if (cb->cb_scripted)
+				(void) printf("\t");
+			else
+				(void) printf("  ");
+		} else {
+			first = B_FALSE;
+		}
+
+		right_justify = B_FALSE;
+		if (pl->pl_prop != ZPROP_INVAL) {
+			if (zpool_get_prop(zhp, pl->pl_prop, property,
+			    sizeof (property), NULL, cb->cb_literal) != 0)
+				propstr = "-";
+			else
+				propstr = property;
+
+			right_justify = zpool_prop_align_right(pl->pl_prop);
+		} else if ((zpool_prop_feature(pl->pl_user_prop) ||
+		    zpool_prop_unsupported(pl->pl_user_prop)) &&
+		    zpool_prop_get_feature(zhp, pl->pl_user_prop, property,
+		    sizeof (property)) == 0) {
+			propstr = property;
+		} else {
+			propstr = "-";
+		}
+
+
+		/*
+		 * If this is being called in scripted mode, or if this is the
+		 * last column and it is left-justified, don't include a width
+		 * format specifier.
+		 */
+		if (cb->cb_scripted || (pl->pl_next == NULL && !right_justify))
+			(void) printf("%s", propstr);
+		else if (right_justify)
+			(void) printf("%*s", (int)width, propstr);
+		else
+			(void) printf("%-*s", (int)width, propstr);
+	}
+
+	(void) printf("\n");
+}
+
+static void
+print_one_column(zpool_prop_t prop, uint64_t value, const char *str,
+    boolean_t scripted, boolean_t valid, enum zfs_nicenum_format format)
+{
+	char propval[64];
+	boolean_t fixed;
+	size_t width = zprop_width(prop, &fixed, ZFS_TYPE_POOL);
+
+	switch (prop) {
+	case ZPOOL_PROP_EXPANDSZ:
+	case ZPOOL_PROP_CHECKPOINT:
+	case ZPOOL_PROP_DEDUPRATIO:
+		if (value == 0)
+			(void) strlcpy(propval, "-", sizeof (propval));
+		else
+			zfs_nicenum_format(value, propval, sizeof (propval),
+			    format);
+		break;
+	case ZPOOL_PROP_FRAGMENTATION:
+		if (value == ZFS_FRAG_INVALID) {
+			(void) strlcpy(propval, "-", sizeof (propval));
+		} else if (format == ZFS_NICENUM_RAW) {
+			(void) snprintf(propval, sizeof (propval), "%llu",
+			    (unsigned long long)value);
+		} else {
+			(void) snprintf(propval, sizeof (propval), "%llu%%",
+			    (unsigned long long)value);
+		}
+		break;
+	case ZPOOL_PROP_CAPACITY:
+		/* capacity value is in parts-per-10,000 (aka permyriad) */
+		if (format == ZFS_NICENUM_RAW)
+			(void) snprintf(propval, sizeof (propval), "%llu",
+			    (unsigned long long)value / 100);
+		else
+			(void) snprintf(propval, sizeof (propval),
+			    value < 1000 ? "%1.2f%%" : value < 10000 ?
+			    "%2.1f%%" : "%3.0f%%", value / 100.0);
+		break;
+	case ZPOOL_PROP_HEALTH:
+		width = 8;
+		snprintf(propval, sizeof (propval), "%-*s", (int)width, str);
+		break;
+	default:
+		zfs_nicenum_format(value, propval, sizeof (propval), format);
+	}
+
+	if (!valid)
+		(void) strlcpy(propval, "-", sizeof (propval));
+
+	if (scripted)
+		(void) printf("\t%s", propval);
+	else
+		(void) printf("  %*s", (int)width, propval);
+}
+
+/*
+ * print static default line per vdev
+ * not compatible with '-o' <proplist> option
+ */
+static void
+print_list_stats(zpool_handle_t *zhp, const char *name, nvlist_t *nv,
+    list_cbdata_t *cb, int depth, boolean_t isspare)
+{
+	nvlist_t **child;
+	vdev_stat_t *vs;
+	uint_t c, children;
+	char *vname;
+	boolean_t scripted = cb->cb_scripted;
+	uint64_t islog = B_FALSE;
+	char *dashes = "%-*s      -      -      -        -         "
+	    "-      -      -      -  -\n";
+
+	verify(nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS,
+	    (uint64_t **)&vs, &c) == 0);
+
+	if (name != NULL) {
+		boolean_t toplevel = (vs->vs_space != 0);
+		uint64_t cap;
+		enum zfs_nicenum_format format;
+		const char *state;
+
+		if (cb->cb_literal)
+			format = ZFS_NICENUM_RAW;
+		else
+			format = ZFS_NICENUM_1024;
+
+		if (strcmp(name, VDEV_TYPE_INDIRECT) == 0)
+			return;
+
+		if (scripted)
+			(void) printf("\t%s", name);
+		else if (strlen(name) + depth > cb->cb_namewidth)
+			(void) printf("%*s%s", depth, "", name);
+		else
+			(void) printf("%*s%s%*s", depth, "", name,
+			    (int)(cb->cb_namewidth - strlen(name) - depth), "");
+
+		/*
+		 * Print the properties for the individual vdevs. Some
+		 * properties are only applicable to toplevel vdevs. The
+		 * 'toplevel' boolean value is passed to the print_one_column()
+		 * to indicate that the value is valid.
+		 */
+		print_one_column(ZPOOL_PROP_SIZE, vs->vs_space, NULL, scripted,
+		    toplevel, format);
+		print_one_column(ZPOOL_PROP_ALLOCATED, vs->vs_alloc, NULL,
+		    scripted, toplevel, format);
+		print_one_column(ZPOOL_PROP_FREE, vs->vs_space - vs->vs_alloc,
+		    NULL, scripted, toplevel, format);
+		print_one_column(ZPOOL_PROP_CHECKPOINT,
+		    vs->vs_checkpoint_space, NULL, scripted, toplevel, format);
+		print_one_column(ZPOOL_PROP_EXPANDSZ, vs->vs_esize, NULL,
+		    scripted, B_TRUE, format);
+		print_one_column(ZPOOL_PROP_FRAGMENTATION,
+		    vs->vs_fragmentation, NULL, scripted,
+		    (vs->vs_fragmentation != ZFS_FRAG_INVALID && toplevel),
+		    format);
+		cap = (vs->vs_space == 0) ? 0 :
+		    (vs->vs_alloc * 10000 / vs->vs_space);
+		print_one_column(ZPOOL_PROP_CAPACITY, cap, NULL,
+		    scripted, toplevel, format);
+		print_one_column(ZPOOL_PROP_DEDUPRATIO, 0, NULL,
+		    scripted, toplevel, format);
+		state = zpool_state_to_name(vs->vs_state, vs->vs_aux);
+		if (isspare) {
+			if (vs->vs_aux == VDEV_AUX_SPARED)
+				state = "INUSE";
+			else if (vs->vs_state == VDEV_STATE_HEALTHY)
+				state = "AVAIL";
+		}
+		print_one_column(ZPOOL_PROP_HEALTH, 0, state, scripted,
+		    B_TRUE, format);
+		(void) printf("\n");
+	}
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0)
+		return;
+
+	/* list the normal vdevs first */
+	for (c = 0; c < children; c++) {
+		uint64_t ishole = B_FALSE;
+
+		if (nvlist_lookup_uint64(child[c],
+		    ZPOOL_CONFIG_IS_HOLE, &ishole) == 0 && ishole)
+			continue;
+
+		if (nvlist_lookup_uint64(child[c],
+		    ZPOOL_CONFIG_IS_LOG, &islog) == 0 && islog)
+			continue;
+
+		if (nvlist_exists(child[c], ZPOOL_CONFIG_ALLOCATION_BIAS))
+			continue;
+
+		vname = zpool_vdev_name(g_zfs, zhp, child[c],
+		    cb->cb_name_flags);
+		print_list_stats(zhp, vname, child[c], cb, depth + 2, B_FALSE);
+		free(vname);
+	}
+
+	/* list the classes: 'logs', 'dedup', and 'special' */
+	for (uint_t n = 0; n < 3; n++) {
+		boolean_t printed = B_FALSE;
+
+		for (c = 0; c < children; c++) {
+			char *bias = NULL;
+			char *type = NULL;
+
+			if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
+			    &islog) == 0 && islog) {
+				bias = VDEV_ALLOC_CLASS_LOGS;
+			} else {
+				(void) nvlist_lookup_string(child[c],
+				    ZPOOL_CONFIG_ALLOCATION_BIAS, &bias);
+				(void) nvlist_lookup_string(child[c],
+				    ZPOOL_CONFIG_TYPE, &type);
+			}
+			if (bias == NULL || strcmp(bias, class_name[n]) != 0)
+				continue;
+			if (!islog && strcmp(type, VDEV_TYPE_INDIRECT) == 0)
+				continue;
+
+			if (!printed) {
+				/* LINTED E_SEC_PRINTF_VAR_FMT */
+				(void) printf(dashes, cb->cb_namewidth,
+				    class_name[n]);
+				printed = B_TRUE;
+			}
+			vname = zpool_vdev_name(g_zfs, zhp, child[c],
+			    cb->cb_name_flags);
+			print_list_stats(zhp, vname, child[c], cb, depth + 2,
+			    B_FALSE);
+			free(vname);
+		}
+	}
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
+	    &child, &children) == 0 && children > 0) {
+		/* LINTED E_SEC_PRINTF_VAR_FMT */
+		(void) printf(dashes, cb->cb_namewidth, "cache");
+		for (c = 0; c < children; c++) {
+			vname = zpool_vdev_name(g_zfs, zhp, child[c],
+			    cb->cb_name_flags);
+			print_list_stats(zhp, vname, child[c], cb, depth + 2,
+			    B_FALSE);
+			free(vname);
+		}
+	}
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES, &child,
+	    &children) == 0 && children > 0) {
+		/* LINTED E_SEC_PRINTF_VAR_FMT */
+		(void) printf(dashes, cb->cb_namewidth, "spare");
+		for (c = 0; c < children; c++) {
+			vname = zpool_vdev_name(g_zfs, zhp, child[c],
+			    cb->cb_name_flags);
+			print_list_stats(zhp, vname, child[c], cb, depth + 2,
+			    B_TRUE);
+			free(vname);
+		}
+	}
+}
+
+/*
+ * Generic callback function to list a pool.
+ */
+static int
+list_callback(zpool_handle_t *zhp, void *data)
+{
+	list_cbdata_t *cbp = data;
+
+	print_pool(zhp, cbp);
+
+	if (cbp->cb_verbose) {
+		nvlist_t *config, *nvroot;
+
+		config = zpool_get_config(zhp, NULL);
+		verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+		    &nvroot) == 0);
+		print_list_stats(zhp, NULL, nvroot, cbp, 0, B_FALSE);
+	}
+
+	return (0);
+}
+
+/*
+ * Set the minimum pool/vdev name column width.  The width must be at least 9,
+ * but may be as large as needed.
+ */
+static int
+get_namewidth_list(zpool_handle_t *zhp, void *data)
+{
+	list_cbdata_t *cb = data;
+	int width;
+
+	width = get_namewidth(zhp, cb->cb_namewidth, cb->cb_name_flags,
+	    cb->cb_verbose);
+
+	if (width < 9)
+		width = 9;
+
+	cb->cb_namewidth = width;
+
+	return (0);
+}
+
+/*
+ * zpool list [-gHLpP] [-o prop[,prop]*] [-T d|u] [pool] ... [interval [count]]
+ *
+ *	-g	Display guid for individual vdev name.
+ *	-H	Scripted mode.  Don't display headers, and separate properties
+ *		by a single tab.
+ *	-L	Follow links when resolving vdev path name.
+ *	-o	List of properties to display.  Defaults to
+ *		"name,size,allocated,free,expandsize,fragmentation,capacity,"
+ *		"dedupratio,health,altroot"
+ *	-p	Display values in parsable (exact) format.
+ *	-P	Display full path for vdev name.
+ *	-T	Display a timestamp in date(1) or Unix format
+ *
+ * List all pools in the system, whether or not they're healthy.  Output space
+ * statistics for each one, as well as health status summary.
+ */
+int
+zpool_do_list(int argc, char **argv)
+{
+	int c;
+	int ret = 0;
+	list_cbdata_t cb = { 0 };
+	static char default_props[] =
+	    "name,size,allocated,free,checkpoint,expandsize,fragmentation,"
+	    "capacity,dedupratio,health,altroot";
+	char *props = default_props;
+	float interval = 0;
+	unsigned long count = 0;
+	zpool_list_t *list;
+	boolean_t first = B_TRUE;
+
+	/* check options */
+	while ((c = getopt(argc, argv, ":gHLo:pPT:v")) != -1) {
+		switch (c) {
+		case 'g':
+			cb.cb_name_flags |= VDEV_NAME_GUID;
+			break;
+		case 'H':
+			cb.cb_scripted = B_TRUE;
+			break;
+		case 'L':
+			cb.cb_name_flags |= VDEV_NAME_FOLLOW_LINKS;
+			break;
+		case 'o':
+			props = optarg;
+			break;
+		case 'P':
+			cb.cb_name_flags |= VDEV_NAME_PATH;
+			break;
+		case 'p':
+			cb.cb_literal = B_TRUE;
+			break;
+		case 'T':
+			get_timestamp_arg(*optarg);
+			break;
+		case 'v':
+			cb.cb_verbose = B_TRUE;
+			cb.cb_namewidth = 8;	/* 8 until precalc is avail */
+			break;
+		case ':':
+			(void) fprintf(stderr, gettext("missing argument for "
+			    "'%c' option\n"), optopt);
+			usage(B_FALSE);
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	get_interval_count(&argc, argv, &interval, &count);
+
+	if (zprop_get_list(g_zfs, props, &cb.cb_proplist, ZFS_TYPE_POOL) != 0)
+		usage(B_FALSE);
+
+	for (;;) {
+		if ((list = pool_list_get(argc, argv, &cb.cb_proplist,
+		    &ret)) == NULL)
+			return (1);
+
+		if (pool_list_count(list) == 0)
+			break;
+
+		cb.cb_namewidth = 0;
+		(void) pool_list_iter(list, B_FALSE, get_namewidth_list, &cb);
+
+		if (timestamp_fmt != NODATE)
+			print_timestamp(timestamp_fmt);
+
+		if (!cb.cb_scripted && (first || cb.cb_verbose)) {
+			print_header(&cb);
+			first = B_FALSE;
+		}
+		ret = pool_list_iter(list, B_TRUE, list_callback, &cb);
+
+		if (interval == 0)
+			break;
+
+		if (count != 0 && --count == 0)
+			break;
+
+		pool_list_free(list);
+		(void) fsleep(interval);
+	}
+
+	if (argc == 0 && !cb.cb_scripted && pool_list_count(list) == 0) {
+		(void) printf(gettext("no pools available\n"));
+		ret = 0;
+	}
+
+	pool_list_free(list);
+	zprop_free_list(cb.cb_proplist);
+	return (ret);
+}
+
+static int
+zpool_do_attach_or_replace(int argc, char **argv, int replacing)
+{
+	boolean_t force = B_FALSE;
+	boolean_t rebuild = B_FALSE;
+	boolean_t wait = B_FALSE;
+	int c;
+	nvlist_t *nvroot;
+	char *poolname, *old_disk, *new_disk;
+	zpool_handle_t *zhp;
+	nvlist_t *props = NULL;
+	char *propval;
+	int ret;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "fo:sw")) != -1) {
+		switch (c) {
+		case 'f':
+			force = B_TRUE;
+			break;
+		case 'o':
+			if ((propval = strchr(optarg, '=')) == NULL) {
+				(void) fprintf(stderr, gettext("missing "
+				    "'=' for -o option\n"));
+				usage(B_FALSE);
+			}
+			*propval = '\0';
+			propval++;
+
+			if ((strcmp(optarg, ZPOOL_CONFIG_ASHIFT) != 0) ||
+			    (add_prop_list(optarg, propval, &props, B_TRUE)))
+				usage(B_FALSE);
+			break;
+		case 's':
+			rebuild = B_TRUE;
+			break;
+		case 'w':
+			wait = B_TRUE;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* get pool name and check number of arguments */
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name argument\n"));
+		usage(B_FALSE);
+	}
+
+	poolname = argv[0];
+
+	if (argc < 2) {
+		(void) fprintf(stderr,
+		    gettext("missing <device> specification\n"));
+		usage(B_FALSE);
+	}
+
+	old_disk = argv[1];
+
+	if (argc < 3) {
+		if (!replacing) {
+			(void) fprintf(stderr,
+			    gettext("missing <new_device> specification\n"));
+			usage(B_FALSE);
+		}
+		new_disk = old_disk;
+		argc -= 1;
+		argv += 1;
+	} else {
+		new_disk = argv[2];
+		argc -= 2;
+		argv += 2;
+	}
+
+	if (argc > 1) {
+		(void) fprintf(stderr, gettext("too many arguments\n"));
+		usage(B_FALSE);
+	}
+
+	if ((zhp = zpool_open(g_zfs, poolname)) == NULL) {
+		nvlist_free(props);
+		return (1);
+	}
+
+	if (zpool_get_config(zhp, NULL) == NULL) {
+		(void) fprintf(stderr, gettext("pool '%s' is unavailable\n"),
+		    poolname);
+		zpool_close(zhp);
+		nvlist_free(props);
+		return (1);
+	}
+
+	/* unless manually specified use "ashift" pool property (if set) */
+	if (!nvlist_exists(props, ZPOOL_CONFIG_ASHIFT)) {
+		int intval;
+		zprop_source_t src;
+		char strval[ZPOOL_MAXPROPLEN];
+
+		intval = zpool_get_prop_int(zhp, ZPOOL_PROP_ASHIFT, &src);
+		if (src != ZPROP_SRC_DEFAULT) {
+			(void) sprintf(strval, "%" PRId32, intval);
+			verify(add_prop_list(ZPOOL_CONFIG_ASHIFT, strval,
+			    &props, B_TRUE) == 0);
+		}
+	}
+
+	nvroot = make_root_vdev(zhp, props, force, B_FALSE, replacing, B_FALSE,
+	    argc, argv);
+	if (nvroot == NULL) {
+		zpool_close(zhp);
+		nvlist_free(props);
+		return (1);
+	}
+
+	ret = zpool_vdev_attach(zhp, old_disk, new_disk, nvroot, replacing,
+	    rebuild);
+
+	if (ret == 0 && wait)
+		ret = zpool_wait(zhp,
+		    replacing ? ZPOOL_WAIT_REPLACE : ZPOOL_WAIT_RESILVER);
+
+	nvlist_free(props);
+	nvlist_free(nvroot);
+	zpool_close(zhp);
+
+	return (ret);
+}
+
+/*
+ * zpool replace [-fsw] [-o property=value] <pool> <device> <new_device>
+ *
+ *	-f	Force attach, even if <new_device> appears to be in use.
+ *	-s	Use sequential instead of healing reconstruction for resilver.
+ *	-o	Set property=value.
+ *	-w	Wait for replacing to complete before returning
+ *
+ * Replace <device> with <new_device>.
+ */
+/* ARGSUSED */
+int
+zpool_do_replace(int argc, char **argv)
+{
+	return (zpool_do_attach_or_replace(argc, argv, B_TRUE));
+}
+
+/*
+ * zpool attach [-fsw] [-o property=value] <pool> <device> <new_device>
+ *
+ *	-f	Force attach, even if <new_device> appears to be in use.
+ *	-s	Use sequential instead of healing reconstruction for resilver.
+ *	-o	Set property=value.
+ *	-w	Wait for resilvering to complete before returning
+ *
+ * Attach <new_device> to the mirror containing <device>.  If <device> is not
+ * part of a mirror, then <device> will be transformed into a mirror of
+ * <device> and <new_device>.  In either case, <new_device> will begin life
+ * with a DTL of [0, now], and will immediately begin to resilver itself.
+ */
+int
+zpool_do_attach(int argc, char **argv)
+{
+	return (zpool_do_attach_or_replace(argc, argv, B_FALSE));
+}
+
+/*
+ * zpool detach [-f] <pool> <device>
+ *
+ *	-f	Force detach of <device>, even if DTLs argue against it
+ *		(not supported yet)
+ *
+ * Detach a device from a mirror.  The operation will be refused if <device>
+ * is the last device in the mirror, or if the DTLs indicate that this device
+ * has the only valid copy of some data.
+ */
+/* ARGSUSED */
+int
+zpool_do_detach(int argc, char **argv)
+{
+	int c;
+	char *poolname, *path;
+	zpool_handle_t *zhp;
+	int ret;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "")) != -1) {
+		switch (c) {
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* get pool name and check number of arguments */
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name argument\n"));
+		usage(B_FALSE);
+	}
+
+	if (argc < 2) {
+		(void) fprintf(stderr,
+		    gettext("missing <device> specification\n"));
+		usage(B_FALSE);
+	}
+
+	poolname = argv[0];
+	path = argv[1];
+
+	if ((zhp = zpool_open(g_zfs, poolname)) == NULL)
+		return (1);
+
+	ret = zpool_vdev_detach(zhp, path);
+
+	zpool_close(zhp);
+
+	return (ret);
+}
+
+/*
+ * zpool split [-gLnP] [-o prop=val] ...
+ *		[-o mntopt] ...
+ *		[-R altroot] <pool> <newpool> [<device> ...]
+ *
+ *	-g      Display guid for individual vdev name.
+ *	-L	Follow links when resolving vdev path name.
+ *	-n	Do not split the pool, but display the resulting layout if
+ *		it were to be split.
+ *	-o	Set property=value, or set mount options.
+ *	-P	Display full path for vdev name.
+ *	-R	Mount the split-off pool under an alternate root.
+ *	-l	Load encryption keys while importing.
+ *
+ * Splits the named pool and gives it the new pool name.  Devices to be split
+ * off may be listed, provided that no more than one device is specified
+ * per top-level vdev mirror.  The newly split pool is left in an exported
+ * state unless -R is specified.
+ *
+ * Restrictions: the top-level of the pool pool must only be made up of
+ * mirrors; all devices in the pool must be healthy; no device may be
+ * undergoing a resilvering operation.
+ */
+int
+zpool_do_split(int argc, char **argv)
+{
+	char *srcpool, *newpool, *propval;
+	char *mntopts = NULL;
+	splitflags_t flags;
+	int c, ret = 0;
+	boolean_t loadkeys = B_FALSE;
+	zpool_handle_t *zhp;
+	nvlist_t *config, *props = NULL;
+
+	flags.dryrun = B_FALSE;
+	flags.import = B_FALSE;
+	flags.name_flags = 0;
+
+	/* check options */
+	while ((c = getopt(argc, argv, ":gLR:lno:P")) != -1) {
+		switch (c) {
+		case 'g':
+			flags.name_flags |= VDEV_NAME_GUID;
+			break;
+		case 'L':
+			flags.name_flags |= VDEV_NAME_FOLLOW_LINKS;
+			break;
+		case 'R':
+			flags.import = B_TRUE;
+			if (add_prop_list(
+			    zpool_prop_to_name(ZPOOL_PROP_ALTROOT), optarg,
+			    &props, B_TRUE) != 0) {
+				nvlist_free(props);
+				usage(B_FALSE);
+			}
+			break;
+		case 'l':
+			loadkeys = B_TRUE;
+			break;
+		case 'n':
+			flags.dryrun = B_TRUE;
+			break;
+		case 'o':
+			if ((propval = strchr(optarg, '=')) != NULL) {
+				*propval = '\0';
+				propval++;
+				if (add_prop_list(optarg, propval,
+				    &props, B_TRUE) != 0) {
+					nvlist_free(props);
+					usage(B_FALSE);
+				}
+			} else {
+				mntopts = optarg;
+			}
+			break;
+		case 'P':
+			flags.name_flags |= VDEV_NAME_PATH;
+			break;
+		case ':':
+			(void) fprintf(stderr, gettext("missing argument for "
+			    "'%c' option\n"), optopt);
+			usage(B_FALSE);
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+			break;
+		}
+	}
+
+	if (!flags.import && mntopts != NULL) {
+		(void) fprintf(stderr, gettext("setting mntopts is only "
+		    "valid when importing the pool\n"));
+		usage(B_FALSE);
+	}
+
+	if (!flags.import && loadkeys) {
+		(void) fprintf(stderr, gettext("loading keys is only "
+		    "valid when importing the pool\n"));
+		usage(B_FALSE);
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("Missing pool name\n"));
+		usage(B_FALSE);
+	}
+	if (argc < 2) {
+		(void) fprintf(stderr, gettext("Missing new pool name\n"));
+		usage(B_FALSE);
+	}
+
+	srcpool = argv[0];
+	newpool = argv[1];
+
+	argc -= 2;
+	argv += 2;
+
+	if ((zhp = zpool_open(g_zfs, srcpool)) == NULL) {
+		nvlist_free(props);
+		return (1);
+	}
+
+	config = split_mirror_vdev(zhp, newpool, props, flags, argc, argv);
+	if (config == NULL) {
+		ret = 1;
+	} else {
+		if (flags.dryrun) {
+			(void) printf(gettext("would create '%s' with the "
+			    "following layout:\n\n"), newpool);
+			print_vdev_tree(NULL, newpool, config, 0, "",
+			    flags.name_flags);
+		}
+	}
+
+	zpool_close(zhp);
+
+	if (ret != 0 || flags.dryrun || !flags.import) {
+		nvlist_free(config);
+		nvlist_free(props);
+		return (ret);
+	}
+
+	/*
+	 * The split was successful. Now we need to open the new
+	 * pool and import it.
+	 */
+	if ((zhp = zpool_open_canfail(g_zfs, newpool)) == NULL) {
+		nvlist_free(config);
+		nvlist_free(props);
+		return (1);
+	}
+
+	if (loadkeys) {
+		ret = zfs_crypto_attempt_load_keys(g_zfs, newpool);
+		if (ret != 0)
+			ret = 1;
+	}
+
+	if (zpool_get_state(zhp) != POOL_STATE_UNAVAIL &&
+	    zpool_enable_datasets(zhp, mntopts, 0) != 0) {
+		ret = 1;
+		(void) fprintf(stderr, gettext("Split was successful, but "
+		    "the datasets could not all be mounted\n"));
+		(void) fprintf(stderr, gettext("Try doing '%s' with a "
+		    "different altroot\n"), "zpool import");
+	}
+	zpool_close(zhp);
+	nvlist_free(config);
+	nvlist_free(props);
+
+	return (ret);
+}
+
+
+
+/*
+ * zpool online <pool> <device> ...
+ */
+int
+zpool_do_online(int argc, char **argv)
+{
+	int c, i;
+	char *poolname;
+	zpool_handle_t *zhp;
+	int ret = 0;
+	vdev_state_t newstate;
+	int flags = 0;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "e")) != -1) {
+		switch (c) {
+		case 'e':
+			flags |= ZFS_ONLINE_EXPAND;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* get pool name and check number of arguments */
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name\n"));
+		usage(B_FALSE);
+	}
+	if (argc < 2) {
+		(void) fprintf(stderr, gettext("missing device name\n"));
+		usage(B_FALSE);
+	}
+
+	poolname = argv[0];
+
+	if ((zhp = zpool_open(g_zfs, poolname)) == NULL)
+		return (1);
+
+	for (i = 1; i < argc; i++) {
+		if (zpool_vdev_online(zhp, argv[i], flags, &newstate) == 0) {
+			if (newstate != VDEV_STATE_HEALTHY) {
+				(void) printf(gettext("warning: device '%s' "
+				    "onlined, but remains in faulted state\n"),
+				    argv[i]);
+				if (newstate == VDEV_STATE_FAULTED)
+					(void) printf(gettext("use 'zpool "
+					    "clear' to restore a faulted "
+					    "device\n"));
+				else
+					(void) printf(gettext("use 'zpool "
+					    "replace' to replace devices "
+					    "that are no longer present\n"));
+			}
+		} else {
+			ret = 1;
+		}
+	}
+
+	zpool_close(zhp);
+
+	return (ret);
+}
+
+/*
+ * zpool offline [-ft] <pool> <device> ...
+ *
+ *	-f	Force the device into a faulted state.
+ *
+ *	-t	Only take the device off-line temporarily.  The offline/faulted
+ *		state will not be persistent across reboots.
+ */
+/* ARGSUSED */
+int
+zpool_do_offline(int argc, char **argv)
+{
+	int c, i;
+	char *poolname;
+	zpool_handle_t *zhp;
+	int ret = 0;
+	boolean_t istmp = B_FALSE;
+	boolean_t fault = B_FALSE;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "ft")) != -1) {
+		switch (c) {
+		case 'f':
+			fault = B_TRUE;
+			break;
+		case 't':
+			istmp = B_TRUE;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* get pool name and check number of arguments */
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name\n"));
+		usage(B_FALSE);
+	}
+	if (argc < 2) {
+		(void) fprintf(stderr, gettext("missing device name\n"));
+		usage(B_FALSE);
+	}
+
+	poolname = argv[0];
+
+	if ((zhp = zpool_open(g_zfs, poolname)) == NULL)
+		return (1);
+
+	for (i = 1; i < argc; i++) {
+		if (fault) {
+			uint64_t guid = zpool_vdev_path_to_guid(zhp, argv[i]);
+			vdev_aux_t aux;
+			if (istmp == B_FALSE) {
+				/* Force the fault to persist across imports */
+				aux = VDEV_AUX_EXTERNAL_PERSIST;
+			} else {
+				aux = VDEV_AUX_EXTERNAL;
+			}
+
+			if (guid == 0 || zpool_vdev_fault(zhp, guid, aux) != 0)
+				ret = 1;
+		} else {
+			if (zpool_vdev_offline(zhp, argv[i], istmp) != 0)
+				ret = 1;
+		}
+	}
+
+	zpool_close(zhp);
+
+	return (ret);
+}
+
+/*
+ * zpool clear <pool> [device]
+ *
+ * Clear all errors associated with a pool or a particular device.
+ */
+int
+zpool_do_clear(int argc, char **argv)
+{
+	int c;
+	int ret = 0;
+	boolean_t dryrun = B_FALSE;
+	boolean_t do_rewind = B_FALSE;
+	boolean_t xtreme_rewind = B_FALSE;
+	uint32_t rewind_policy = ZPOOL_NO_REWIND;
+	nvlist_t *policy = NULL;
+	zpool_handle_t *zhp;
+	char *pool, *device;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "FnX")) != -1) {
+		switch (c) {
+		case 'F':
+			do_rewind = B_TRUE;
+			break;
+		case 'n':
+			dryrun = B_TRUE;
+			break;
+		case 'X':
+			xtreme_rewind = B_TRUE;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name\n"));
+		usage(B_FALSE);
+	}
+
+	if (argc > 2) {
+		(void) fprintf(stderr, gettext("too many arguments\n"));
+		usage(B_FALSE);
+	}
+
+	if ((dryrun || xtreme_rewind) && !do_rewind) {
+		(void) fprintf(stderr,
+		    gettext("-n or -X only meaningful with -F\n"));
+		usage(B_FALSE);
+	}
+	if (dryrun)
+		rewind_policy = ZPOOL_TRY_REWIND;
+	else if (do_rewind)
+		rewind_policy = ZPOOL_DO_REWIND;
+	if (xtreme_rewind)
+		rewind_policy |= ZPOOL_EXTREME_REWIND;
+
+	/* In future, further rewind policy choices can be passed along here */
+	if (nvlist_alloc(&policy, NV_UNIQUE_NAME, 0) != 0 ||
+	    nvlist_add_uint32(policy, ZPOOL_LOAD_REWIND_POLICY,
+	    rewind_policy) != 0) {
+		return (1);
+	}
+
+	pool = argv[0];
+	device = argc == 2 ? argv[1] : NULL;
+
+	if ((zhp = zpool_open_canfail(g_zfs, pool)) == NULL) {
+		nvlist_free(policy);
+		return (1);
+	}
+
+	if (zpool_clear(zhp, device, policy) != 0)
+		ret = 1;
+
+	zpool_close(zhp);
+
+	nvlist_free(policy);
+
+	return (ret);
+}
+
+/*
+ * zpool reguid <pool>
+ */
+int
+zpool_do_reguid(int argc, char **argv)
+{
+	int c;
+	char *poolname;
+	zpool_handle_t *zhp;
+	int ret = 0;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "")) != -1) {
+		switch (c) {
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* get pool name and check number of arguments */
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name\n"));
+		usage(B_FALSE);
+	}
+
+	if (argc > 1) {
+		(void) fprintf(stderr, gettext("too many arguments\n"));
+		usage(B_FALSE);
+	}
+
+	poolname = argv[0];
+	if ((zhp = zpool_open(g_zfs, poolname)) == NULL)
+		return (1);
+
+	ret = zpool_reguid(zhp);
+
+	zpool_close(zhp);
+	return (ret);
+}
+
+
+/*
+ * zpool reopen <pool>
+ *
+ * Reopen the pool so that the kernel can update the sizes of all vdevs.
+ */
+int
+zpool_do_reopen(int argc, char **argv)
+{
+	int c;
+	int ret = 0;
+	boolean_t scrub_restart = B_TRUE;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "n")) != -1) {
+		switch (c) {
+		case 'n':
+			scrub_restart = B_FALSE;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/* if argc == 0 we will execute zpool_reopen_one on all pools */
+	ret = for_each_pool(argc, argv, B_TRUE, NULL, zpool_reopen_one,
+	    &scrub_restart);
+
+	return (ret);
+}
+
+typedef struct scrub_cbdata {
+	int	cb_type;
+	pool_scrub_cmd_t cb_scrub_cmd;
+} scrub_cbdata_t;
+
+static boolean_t
+zpool_has_checkpoint(zpool_handle_t *zhp)
+{
+	nvlist_t *config, *nvroot;
+
+	config = zpool_get_config(zhp, NULL);
+
+	if (config != NULL) {
+		pool_checkpoint_stat_t *pcs = NULL;
+		uint_t c;
+
+		nvroot = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE);
+		(void) nvlist_lookup_uint64_array(nvroot,
+		    ZPOOL_CONFIG_CHECKPOINT_STATS, (uint64_t **)&pcs, &c);
+
+		if (pcs == NULL || pcs->pcs_state == CS_NONE)
+			return (B_FALSE);
+
+		assert(pcs->pcs_state == CS_CHECKPOINT_EXISTS ||
+		    pcs->pcs_state == CS_CHECKPOINT_DISCARDING);
+		return (B_TRUE);
+	}
+
+	return (B_FALSE);
+}
+
+static int
+scrub_callback(zpool_handle_t *zhp, void *data)
+{
+	scrub_cbdata_t *cb = data;
+	int err;
+
+	/*
+	 * Ignore faulted pools.
+	 */
+	if (zpool_get_state(zhp) == POOL_STATE_UNAVAIL) {
+		(void) fprintf(stderr, gettext("cannot scan '%s': pool is "
+		    "currently unavailable\n"), zpool_get_name(zhp));
+		return (1);
+	}
+
+	err = zpool_scan(zhp, cb->cb_type, cb->cb_scrub_cmd);
+
+	if (err == 0 && zpool_has_checkpoint(zhp) &&
+	    cb->cb_type == POOL_SCAN_SCRUB) {
+		(void) printf(gettext("warning: will not scrub state that "
+		    "belongs to the checkpoint of pool '%s'\n"),
+		    zpool_get_name(zhp));
+	}
+
+	return (err != 0);
+}
+
+static int
+wait_callback(zpool_handle_t *zhp, void *data)
+{
+	zpool_wait_activity_t *act = data;
+	return (zpool_wait(zhp, *act));
+}
+
+/*
+ * zpool scrub [-s | -p] [-w] <pool> ...
+ *
+ *	-s	Stop.  Stops any in-progress scrub.
+ *	-p	Pause. Pause in-progress scrub.
+ *	-w	Wait.  Blocks until scrub has completed.
+ */
+int
+zpool_do_scrub(int argc, char **argv)
+{
+	int c;
+	scrub_cbdata_t cb;
+	boolean_t wait = B_FALSE;
+	int error;
+
+	cb.cb_type = POOL_SCAN_SCRUB;
+	cb.cb_scrub_cmd = POOL_SCRUB_NORMAL;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "spw")) != -1) {
+		switch (c) {
+		case 's':
+			cb.cb_type = POOL_SCAN_NONE;
+			break;
+		case 'p':
+			cb.cb_scrub_cmd = POOL_SCRUB_PAUSE;
+			break;
+		case 'w':
+			wait = B_TRUE;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	if (cb.cb_type == POOL_SCAN_NONE &&
+	    cb.cb_scrub_cmd == POOL_SCRUB_PAUSE) {
+		(void) fprintf(stderr, gettext("invalid option combination: "
+		    "-s and -p are mutually exclusive\n"));
+		usage(B_FALSE);
+	}
+
+	if (wait && (cb.cb_type == POOL_SCAN_NONE ||
+	    cb.cb_scrub_cmd == POOL_SCRUB_PAUSE)) {
+		(void) fprintf(stderr, gettext("invalid option combination: "
+		    "-w cannot be used with -p or -s\n"));
+		usage(B_FALSE);
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name argument\n"));
+		usage(B_FALSE);
+	}
+
+	error = for_each_pool(argc, argv, B_TRUE, NULL, scrub_callback, &cb);
+
+	if (wait && !error) {
+		zpool_wait_activity_t act = ZPOOL_WAIT_SCRUB;
+		error = for_each_pool(argc, argv, B_TRUE, NULL, wait_callback,
+		    &act);
+	}
+
+	return (error);
+}
+
+/*
+ * zpool resilver <pool> ...
+ *
+ *	Restarts any in-progress resilver
+ */
+int
+zpool_do_resilver(int argc, char **argv)
+{
+	int c;
+	scrub_cbdata_t cb;
+
+	cb.cb_type = POOL_SCAN_RESILVER;
+	cb.cb_scrub_cmd = POOL_SCRUB_NORMAL;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "")) != -1) {
+		switch (c) {
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name argument\n"));
+		usage(B_FALSE);
+	}
+
+	return (for_each_pool(argc, argv, B_TRUE, NULL, scrub_callback, &cb));
+}
+
+/*
+ * zpool trim [-d] [-r <rate>] [-c | -s] <pool> [<device> ...]
+ *
+ *	-c		Cancel. Ends any in-progress trim.
+ *	-d		Secure trim.  Requires kernel and device support.
+ *	-r <rate>	Sets the TRIM rate in bytes (per second). Supports
+ *			adding a multiplier suffix such as 'k' or 'm'.
+ *	-s		Suspend. TRIM can then be restarted with no flags.
+ *	-w		Wait. Blocks until trimming has completed.
+ */
+int
+zpool_do_trim(int argc, char **argv)
+{
+	struct option long_options[] = {
+		{"cancel",	no_argument,		NULL,	'c'},
+		{"secure",	no_argument,		NULL,	'd'},
+		{"rate",	required_argument,	NULL,	'r'},
+		{"suspend",	no_argument,		NULL,	's'},
+		{"wait",	no_argument,		NULL,	'w'},
+		{0, 0, 0, 0}
+	};
+
+	pool_trim_func_t cmd_type = POOL_TRIM_START;
+	uint64_t rate = 0;
+	boolean_t secure = B_FALSE;
+	boolean_t wait = B_FALSE;
+
+	int c;
+	while ((c = getopt_long(argc, argv, "cdr:sw", long_options, NULL))
+	    != -1) {
+		switch (c) {
+		case 'c':
+			if (cmd_type != POOL_TRIM_START &&
+			    cmd_type != POOL_TRIM_CANCEL) {
+				(void) fprintf(stderr, gettext("-c cannot be "
+				    "combined with other options\n"));
+				usage(B_FALSE);
+			}
+			cmd_type = POOL_TRIM_CANCEL;
+			break;
+		case 'd':
+			if (cmd_type != POOL_TRIM_START) {
+				(void) fprintf(stderr, gettext("-d cannot be "
+				    "combined with the -c or -s options\n"));
+				usage(B_FALSE);
+			}
+			secure = B_TRUE;
+			break;
+		case 'r':
+			if (cmd_type != POOL_TRIM_START) {
+				(void) fprintf(stderr, gettext("-r cannot be "
+				    "combined with the -c or -s options\n"));
+				usage(B_FALSE);
+			}
+			if (zfs_nicestrtonum(NULL, optarg, &rate) == -1) {
+				(void) fprintf(stderr,
+				    gettext("invalid value for rate\n"));
+				usage(B_FALSE);
+			}
+			break;
+		case 's':
+			if (cmd_type != POOL_TRIM_START &&
+			    cmd_type != POOL_TRIM_SUSPEND) {
+				(void) fprintf(stderr, gettext("-s cannot be "
+				    "combined with other options\n"));
+				usage(B_FALSE);
+			}
+			cmd_type = POOL_TRIM_SUSPEND;
+			break;
+		case 'w':
+			wait = B_TRUE;
+			break;
+		case '?':
+			if (optopt != 0) {
+				(void) fprintf(stderr,
+				    gettext("invalid option '%c'\n"), optopt);
+			} else {
+				(void) fprintf(stderr,
+				    gettext("invalid option '%s'\n"),
+				    argv[optind - 1]);
+			}
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing pool name argument\n"));
+		usage(B_FALSE);
+		return (-1);
+	}
+
+	if (wait && (cmd_type != POOL_TRIM_START)) {
+		(void) fprintf(stderr, gettext("-w cannot be used with -c or "
+		    "-s\n"));
+		usage(B_FALSE);
+	}
+
+	char *poolname = argv[0];
+	zpool_handle_t *zhp = zpool_open(g_zfs, poolname);
+	if (zhp == NULL)
+		return (-1);
+
+	trimflags_t trim_flags = {
+		.secure = secure,
+		.rate = rate,
+		.wait = wait,
+	};
+
+	nvlist_t *vdevs = fnvlist_alloc();
+	if (argc == 1) {
+		/* no individual leaf vdevs specified, so add them all */
+		nvlist_t *config = zpool_get_config(zhp, NULL);
+		nvlist_t *nvroot = fnvlist_lookup_nvlist(config,
+		    ZPOOL_CONFIG_VDEV_TREE);
+		zpool_collect_leaves(zhp, nvroot, vdevs);
+		trim_flags.fullpool = B_TRUE;
+	} else {
+		trim_flags.fullpool = B_FALSE;
+		for (int i = 1; i < argc; i++) {
+			fnvlist_add_boolean(vdevs, argv[i]);
+		}
+	}
+
+	int error = zpool_trim(zhp, cmd_type, vdevs, &trim_flags);
+
+	fnvlist_free(vdevs);
+	zpool_close(zhp);
+
+	return (error);
+}
+
+/*
+ * Converts a total number of seconds to a human readable string broken
+ * down in to days/hours/minutes/seconds.
+ */
+static void
+secs_to_dhms(uint64_t total, char *buf)
+{
+	uint64_t days = total / 60 / 60 / 24;
+	uint64_t hours = (total / 60 / 60) % 24;
+	uint64_t mins = (total / 60) % 60;
+	uint64_t secs = (total % 60);
+
+	if (days > 0) {
+		(void) sprintf(buf, "%llu days %02llu:%02llu:%02llu",
+		    (u_longlong_t)days, (u_longlong_t)hours,
+		    (u_longlong_t)mins, (u_longlong_t)secs);
+	} else {
+		(void) sprintf(buf, "%02llu:%02llu:%02llu",
+		    (u_longlong_t)hours, (u_longlong_t)mins,
+		    (u_longlong_t)secs);
+	}
+}
+
+/*
+ * Print out detailed scrub status.
+ */
+static void
+print_scan_scrub_resilver_status(pool_scan_stat_t *ps)
+{
+	time_t start, end, pause;
+	uint64_t pass_scanned, scanned, pass_issued, issued, total;
+	uint64_t elapsed, scan_rate, issue_rate;
+	double fraction_done;
+	char processed_buf[7], scanned_buf[7], issued_buf[7], total_buf[7];
+	char srate_buf[7], irate_buf[7], time_buf[32];
+
+	printf("  ");
+	printf_color(ANSI_BOLD, gettext("scan:"));
+	printf(" ");
+
+	/* If there's never been a scan, there's not much to say. */
+	if (ps == NULL || ps->pss_func == POOL_SCAN_NONE ||
+	    ps->pss_func >= POOL_SCAN_FUNCS) {
+		(void) printf(gettext("none requested\n"));
+		return;
+	}
+
+	start = ps->pss_start_time;
+	end = ps->pss_end_time;
+	pause = ps->pss_pass_scrub_pause;
+
+	zfs_nicebytes(ps->pss_processed, processed_buf, sizeof (processed_buf));
+
+	assert(ps->pss_func == POOL_SCAN_SCRUB ||
+	    ps->pss_func == POOL_SCAN_RESILVER);
+
+	/* Scan is finished or canceled. */
+	if (ps->pss_state == DSS_FINISHED) {
+		secs_to_dhms(end - start, time_buf);
+
+		if (ps->pss_func == POOL_SCAN_SCRUB) {
+			(void) printf(gettext("scrub repaired %s "
+			    "in %s with %llu errors on %s"), processed_buf,
+			    time_buf, (u_longlong_t)ps->pss_errors,
+			    ctime(&end));
+		} else if (ps->pss_func == POOL_SCAN_RESILVER) {
+			(void) printf(gettext("resilvered %s "
+			    "in %s with %llu errors on %s"), processed_buf,
+			    time_buf, (u_longlong_t)ps->pss_errors,
+			    ctime(&end));
+		}
+		return;
+	} else if (ps->pss_state == DSS_CANCELED) {
+		if (ps->pss_func == POOL_SCAN_SCRUB) {
+			(void) printf(gettext("scrub canceled on %s"),
+			    ctime(&end));
+		} else if (ps->pss_func == POOL_SCAN_RESILVER) {
+			(void) printf(gettext("resilver canceled on %s"),
+			    ctime(&end));
+		}
+		return;
+	}
+
+	assert(ps->pss_state == DSS_SCANNING);
+
+	/* Scan is in progress. Resilvers can't be paused. */
+	if (ps->pss_func == POOL_SCAN_SCRUB) {
+		if (pause == 0) {
+			(void) printf(gettext("scrub in progress since %s"),
+			    ctime(&start));
+		} else {
+			(void) printf(gettext("scrub paused since %s"),
+			    ctime(&pause));
+			(void) printf(gettext("\tscrub started on %s"),
+			    ctime(&start));
+		}
+	} else if (ps->pss_func == POOL_SCAN_RESILVER) {
+		(void) printf(gettext("resilver in progress since %s"),
+		    ctime(&start));
+	}
+
+	scanned = ps->pss_examined;
+	pass_scanned = ps->pss_pass_exam;
+	issued = ps->pss_issued;
+	pass_issued = ps->pss_pass_issued;
+	total = ps->pss_to_examine;
+
+	/* we are only done with a block once we have issued the IO for it */
+	fraction_done = (double)issued / total;
+
+	/* elapsed time for this pass, rounding up to 1 if it's 0 */
+	elapsed = time(NULL) - ps->pss_pass_start;
+	elapsed -= ps->pss_pass_scrub_spent_paused;
+	elapsed = (elapsed != 0) ? elapsed : 1;
+
+	scan_rate = pass_scanned / elapsed;
+	issue_rate = pass_issued / elapsed;
+	uint64_t total_secs_left = (issue_rate != 0 && total >= issued) ?
+	    ((total - issued) / issue_rate) : UINT64_MAX;
+	secs_to_dhms(total_secs_left, time_buf);
+
+	/* format all of the numbers we will be reporting */
+	zfs_nicebytes(scanned, scanned_buf, sizeof (scanned_buf));
+	zfs_nicebytes(issued, issued_buf, sizeof (issued_buf));
+	zfs_nicebytes(total, total_buf, sizeof (total_buf));
+	zfs_nicebytes(scan_rate, srate_buf, sizeof (srate_buf));
+	zfs_nicebytes(issue_rate, irate_buf, sizeof (irate_buf));
+
+	/* do not print estimated time if we have a paused scrub */
+	if (pause == 0) {
+		(void) printf(gettext("\t%s scanned at %s/s, "
+		    "%s issued at %s/s, %s total\n"),
+		    scanned_buf, srate_buf, issued_buf, irate_buf, total_buf);
+	} else {
+		(void) printf(gettext("\t%s scanned, %s issued, %s total\n"),
+		    scanned_buf, issued_buf, total_buf);
+	}
+
+	if (ps->pss_func == POOL_SCAN_RESILVER) {
+		(void) printf(gettext("\t%s resilvered, %.2f%% done"),
+		    processed_buf, 100 * fraction_done);
+	} else if (ps->pss_func == POOL_SCAN_SCRUB) {
+		(void) printf(gettext("\t%s repaired, %.2f%% done"),
+		    processed_buf, 100 * fraction_done);
+	}
+
+	if (pause == 0) {
+		if (total_secs_left != UINT64_MAX &&
+		    issue_rate >= 10 * 1024 * 1024) {
+			(void) printf(gettext(", %s to go\n"), time_buf);
+		} else {
+			(void) printf(gettext(", no estimated "
+			    "completion time\n"));
+		}
+	} else {
+		(void) printf(gettext("\n"));
+	}
+}
+
+static void
+print_rebuild_status_impl(vdev_rebuild_stat_t *vrs, char *vdev_name)
+{
+	if (vrs == NULL || vrs->vrs_state == VDEV_REBUILD_NONE)
+		return;
+
+	printf("  ");
+	printf_color(ANSI_BOLD, gettext("scan:"));
+	printf(" ");
+
+	uint64_t bytes_scanned = vrs->vrs_bytes_scanned;
+	uint64_t bytes_issued = vrs->vrs_bytes_issued;
+	uint64_t bytes_rebuilt = vrs->vrs_bytes_rebuilt;
+	uint64_t bytes_est = vrs->vrs_bytes_est;
+	uint64_t scan_rate = (vrs->vrs_pass_bytes_scanned /
+	    (vrs->vrs_pass_time_ms + 1)) * 1000;
+	uint64_t issue_rate = (vrs->vrs_pass_bytes_issued /
+	    (vrs->vrs_pass_time_ms + 1)) * 1000;
+	double scan_pct = MIN((double)bytes_scanned * 100 /
+	    (bytes_est + 1), 100);
+
+	/* Format all of the numbers we will be reporting */
+	char bytes_scanned_buf[7], bytes_issued_buf[7];
+	char bytes_rebuilt_buf[7], bytes_est_buf[7];
+	char scan_rate_buf[7], issue_rate_buf[7], time_buf[32];
+	zfs_nicebytes(bytes_scanned, bytes_scanned_buf,
+	    sizeof (bytes_scanned_buf));
+	zfs_nicebytes(bytes_issued, bytes_issued_buf,
+	    sizeof (bytes_issued_buf));
+	zfs_nicebytes(bytes_rebuilt, bytes_rebuilt_buf,
+	    sizeof (bytes_rebuilt_buf));
+	zfs_nicebytes(bytes_est, bytes_est_buf, sizeof (bytes_est_buf));
+	zfs_nicebytes(scan_rate, scan_rate_buf, sizeof (scan_rate_buf));
+	zfs_nicebytes(issue_rate, issue_rate_buf, sizeof (issue_rate_buf));
+
+	time_t start = vrs->vrs_start_time;
+	time_t end = vrs->vrs_end_time;
+
+	/* Rebuild is finished or canceled. */
+	if (vrs->vrs_state == VDEV_REBUILD_COMPLETE) {
+		secs_to_dhms(vrs->vrs_scan_time_ms / 1000, time_buf);
+		(void) printf(gettext("resilvered (%s) %s in %s "
+		    "with %llu errors on %s"), vdev_name, bytes_rebuilt_buf,
+		    time_buf, (u_longlong_t)vrs->vrs_errors, ctime(&end));
+		return;
+	} else if (vrs->vrs_state == VDEV_REBUILD_CANCELED) {
+		(void) printf(gettext("resilver (%s) canceled on %s"),
+		    vdev_name, ctime(&end));
+		return;
+	} else if (vrs->vrs_state == VDEV_REBUILD_ACTIVE) {
+		(void) printf(gettext("resilver (%s) in progress since %s"),
+		    vdev_name, ctime(&start));
+	}
+
+	assert(vrs->vrs_state == VDEV_REBUILD_ACTIVE);
+
+	secs_to_dhms(MAX((int64_t)bytes_est - (int64_t)bytes_scanned, 0) /
+	    MAX(scan_rate, 1), time_buf);
+
+	(void) printf(gettext("\t%s scanned at %s/s, %s issued %s/s, "
+	    "%s total\n"), bytes_scanned_buf, scan_rate_buf,
+	    bytes_issued_buf, issue_rate_buf, bytes_est_buf);
+	(void) printf(gettext("\t%s resilvered, %.2f%% done"),
+	    bytes_rebuilt_buf, scan_pct);
+
+	if (vrs->vrs_state == VDEV_REBUILD_ACTIVE) {
+		if (scan_rate >= 10 * 1024 * 1024) {
+			(void) printf(gettext(", %s to go\n"), time_buf);
+		} else {
+			(void) printf(gettext(", no estimated "
+			    "completion time\n"));
+		}
+	} else {
+		(void) printf(gettext("\n"));
+	}
+}
+
+/*
+ * Print rebuild status for top-level vdevs.
+ */
+static void
+print_rebuild_status(zpool_handle_t *zhp, nvlist_t *nvroot)
+{
+	nvlist_t **child;
+	uint_t children;
+
+	if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0)
+		children = 0;
+
+	for (uint_t c = 0; c < children; c++) {
+		vdev_rebuild_stat_t *vrs;
+		uint_t i;
+
+		if (nvlist_lookup_uint64_array(child[c],
+		    ZPOOL_CONFIG_REBUILD_STATS, (uint64_t **)&vrs, &i) == 0) {
+			char *name = zpool_vdev_name(g_zfs, zhp,
+			    child[c], VDEV_NAME_TYPE_ID);
+			print_rebuild_status_impl(vrs, name);
+			free(name);
+		}
+	}
+}
+
+/*
+ * As we don't scrub checkpointed blocks, we want to warn the user that we
+ * skipped scanning some blocks if a checkpoint exists or existed at any
+ * time during the scan.  If a sequential instead of healing reconstruction
+ * was performed then the blocks were reconstructed.  However, their checksums
+ * have not been verified so we still print the warning.
+ */
+static void
+print_checkpoint_scan_warning(pool_scan_stat_t *ps, pool_checkpoint_stat_t *pcs)
+{
+	if (ps == NULL || pcs == NULL)
+		return;
+
+	if (pcs->pcs_state == CS_NONE ||
+	    pcs->pcs_state == CS_CHECKPOINT_DISCARDING)
+		return;
+
+	assert(pcs->pcs_state == CS_CHECKPOINT_EXISTS);
+
+	if (ps->pss_state == DSS_NONE)
+		return;
+
+	if ((ps->pss_state == DSS_FINISHED || ps->pss_state == DSS_CANCELED) &&
+	    ps->pss_end_time < pcs->pcs_start_time)
+		return;
+
+	if (ps->pss_state == DSS_FINISHED || ps->pss_state == DSS_CANCELED) {
+		(void) printf(gettext("    scan warning: skipped blocks "
+		    "that are only referenced by the checkpoint.\n"));
+	} else {
+		assert(ps->pss_state == DSS_SCANNING);
+		(void) printf(gettext("    scan warning: skipping blocks "
+		    "that are only referenced by the checkpoint.\n"));
+	}
+}
+
+/*
+ * Returns B_TRUE if there is an active rebuild in progress.  Otherwise,
+ * B_FALSE is returned and 'rebuild_end_time' is set to the end time for
+ * the last completed (or cancelled) rebuild.
+ */
+static boolean_t
+check_rebuilding(nvlist_t *nvroot, uint64_t *rebuild_end_time)
+{
+	nvlist_t **child;
+	uint_t children;
+	boolean_t rebuilding = B_FALSE;
+	uint64_t end_time = 0;
+
+	if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0)
+		children = 0;
+
+	for (uint_t c = 0; c < children; c++) {
+		vdev_rebuild_stat_t *vrs;
+		uint_t i;
+
+		if (nvlist_lookup_uint64_array(child[c],
+		    ZPOOL_CONFIG_REBUILD_STATS, (uint64_t **)&vrs, &i) == 0) {
+
+			if (vrs->vrs_end_time > end_time)
+				end_time = vrs->vrs_end_time;
+
+			if (vrs->vrs_state == VDEV_REBUILD_ACTIVE) {
+				rebuilding = B_TRUE;
+				end_time = 0;
+				break;
+			}
+		}
+	}
+
+	if (rebuild_end_time != NULL)
+		*rebuild_end_time = end_time;
+
+	return (rebuilding);
+}
+
+/*
+ * Print the scan status.
+ */
+static void
+print_scan_status(zpool_handle_t *zhp, nvlist_t *nvroot)
+{
+	uint64_t rebuild_end_time = 0, resilver_end_time = 0;
+	boolean_t have_resilver = B_FALSE, have_scrub = B_FALSE;
+	boolean_t active_resilver = B_FALSE;
+	pool_checkpoint_stat_t *pcs = NULL;
+	pool_scan_stat_t *ps = NULL;
+	uint_t c;
+
+	if (nvlist_lookup_uint64_array(nvroot, ZPOOL_CONFIG_SCAN_STATS,
+	    (uint64_t **)&ps, &c) == 0) {
+		if (ps->pss_func == POOL_SCAN_RESILVER) {
+			resilver_end_time = ps->pss_end_time;
+			active_resilver = (ps->pss_state == DSS_SCANNING);
+		}
+
+		have_resilver = (ps->pss_func == POOL_SCAN_RESILVER);
+		have_scrub = (ps->pss_func == POOL_SCAN_SCRUB);
+	}
+
+	boolean_t active_rebuild = check_rebuilding(nvroot, &rebuild_end_time);
+	boolean_t have_rebuild = (active_rebuild || (rebuild_end_time > 0));
+
+	/* Always print the scrub status when available. */
+	if (have_scrub)
+		print_scan_scrub_resilver_status(ps);
+
+	/*
+	 * When there is an active resilver or rebuild print its status.
+	 * Otherwise print the status of the last resilver or rebuild.
+	 */
+	if (active_resilver || (!active_rebuild && have_resilver &&
+	    resilver_end_time && resilver_end_time > rebuild_end_time)) {
+		print_scan_scrub_resilver_status(ps);
+	} else if (active_rebuild || (!active_resilver && have_rebuild &&
+	    rebuild_end_time && rebuild_end_time > resilver_end_time)) {
+		print_rebuild_status(zhp, nvroot);
+	}
+
+	(void) nvlist_lookup_uint64_array(nvroot,
+	    ZPOOL_CONFIG_CHECKPOINT_STATS, (uint64_t **)&pcs, &c);
+	print_checkpoint_scan_warning(ps, pcs);
+}
+
+/*
+ * Print out detailed removal status.
+ */
+static void
+print_removal_status(zpool_handle_t *zhp, pool_removal_stat_t *prs)
+{
+	char copied_buf[7], examined_buf[7], total_buf[7], rate_buf[7];
+	time_t start, end;
+	nvlist_t *config, *nvroot;
+	nvlist_t **child;
+	uint_t children;
+	char *vdev_name;
+
+	if (prs == NULL || prs->prs_state == DSS_NONE)
+		return;
+
+	/*
+	 * Determine name of vdev.
+	 */
+	config = zpool_get_config(zhp, NULL);
+	nvroot = fnvlist_lookup_nvlist(config,
+	    ZPOOL_CONFIG_VDEV_TREE);
+	verify(nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) == 0);
+	assert(prs->prs_removing_vdev < children);
+	vdev_name = zpool_vdev_name(g_zfs, zhp,
+	    child[prs->prs_removing_vdev], B_TRUE);
+
+	(void) printf(gettext("remove: "));
+
+	start = prs->prs_start_time;
+	end = prs->prs_end_time;
+	zfs_nicenum(prs->prs_copied, copied_buf, sizeof (copied_buf));
+
+	/*
+	 * Removal is finished or canceled.
+	 */
+	if (prs->prs_state == DSS_FINISHED) {
+		uint64_t minutes_taken = (end - start) / 60;
+
+		(void) printf(gettext("Removal of vdev %llu copied %s "
+		    "in %lluh%um, completed on %s"),
+		    (longlong_t)prs->prs_removing_vdev,
+		    copied_buf,
+		    (u_longlong_t)(minutes_taken / 60),
+		    (uint_t)(minutes_taken % 60),
+		    ctime((time_t *)&end));
+	} else if (prs->prs_state == DSS_CANCELED) {
+		(void) printf(gettext("Removal of %s canceled on %s"),
+		    vdev_name, ctime(&end));
+	} else {
+		uint64_t copied, total, elapsed, mins_left, hours_left;
+		double fraction_done;
+		uint_t rate;
+
+		assert(prs->prs_state == DSS_SCANNING);
+
+		/*
+		 * Removal is in progress.
+		 */
+		(void) printf(gettext(
+		    "Evacuation of %s in progress since %s"),
+		    vdev_name, ctime(&start));
+
+		copied = prs->prs_copied > 0 ? prs->prs_copied : 1;
+		total = prs->prs_to_copy;
+		fraction_done = (double)copied / total;
+
+		/* elapsed time for this pass */
+		elapsed = time(NULL) - prs->prs_start_time;
+		elapsed = elapsed > 0 ? elapsed : 1;
+		rate = copied / elapsed;
+		rate = rate > 0 ? rate : 1;
+		mins_left = ((total - copied) / rate) / 60;
+		hours_left = mins_left / 60;
+
+		zfs_nicenum(copied, examined_buf, sizeof (examined_buf));
+		zfs_nicenum(total, total_buf, sizeof (total_buf));
+		zfs_nicenum(rate, rate_buf, sizeof (rate_buf));
+
+		/*
+		 * do not print estimated time if hours_left is more than
+		 * 30 days
+		 */
+		(void) printf(gettext("    %s copied out of %s at %s/s, "
+		    "%.2f%% done"),
+		    examined_buf, total_buf, rate_buf, 100 * fraction_done);
+		if (hours_left < (30 * 24)) {
+			(void) printf(gettext(", %lluh%um to go\n"),
+			    (u_longlong_t)hours_left, (uint_t)(mins_left % 60));
+		} else {
+			(void) printf(gettext(
+			    ", (copy is slow, no estimated time)\n"));
+		}
+	}
+	free(vdev_name);
+
+	if (prs->prs_mapping_memory > 0) {
+		char mem_buf[7];
+		zfs_nicenum(prs->prs_mapping_memory, mem_buf, sizeof (mem_buf));
+		(void) printf(gettext("    %s memory used for "
+		    "removed device mappings\n"),
+		    mem_buf);
+	}
+}
+
+static void
+print_checkpoint_status(pool_checkpoint_stat_t *pcs)
+{
+	time_t start;
+	char space_buf[7];
+
+	if (pcs == NULL || pcs->pcs_state == CS_NONE)
+		return;
+
+	(void) printf(gettext("checkpoint: "));
+
+	start = pcs->pcs_start_time;
+	zfs_nicenum(pcs->pcs_space, space_buf, sizeof (space_buf));
+
+	if (pcs->pcs_state == CS_CHECKPOINT_EXISTS) {
+		char *date = ctime(&start);
+
+		/*
+		 * ctime() adds a newline at the end of the generated
+		 * string, thus the weird format specifier and the
+		 * strlen() call used to chop it off from the output.
+		 */
+		(void) printf(gettext("created %.*s, consumes %s\n"),
+		    (int)(strlen(date) - 1), date, space_buf);
+		return;
+	}
+
+	assert(pcs->pcs_state == CS_CHECKPOINT_DISCARDING);
+
+	(void) printf(gettext("discarding, %s remaining.\n"),
+	    space_buf);
+}
+
+static void
+print_error_log(zpool_handle_t *zhp)
+{
+	nvlist_t *nverrlist = NULL;
+	nvpair_t *elem;
+	char *pathname;
+	size_t len = MAXPATHLEN * 2;
+
+	if (zpool_get_errlog(zhp, &nverrlist) != 0)
+		return;
+
+	(void) printf("errors: Permanent errors have been "
+	    "detected in the following files:\n\n");
+
+	pathname = safe_malloc(len);
+	elem = NULL;
+	while ((elem = nvlist_next_nvpair(nverrlist, elem)) != NULL) {
+		nvlist_t *nv;
+		uint64_t dsobj, obj;
+
+		verify(nvpair_value_nvlist(elem, &nv) == 0);
+		verify(nvlist_lookup_uint64(nv, ZPOOL_ERR_DATASET,
+		    &dsobj) == 0);
+		verify(nvlist_lookup_uint64(nv, ZPOOL_ERR_OBJECT,
+		    &obj) == 0);
+		zpool_obj_to_path(zhp, dsobj, obj, pathname, len);
+		(void) printf("%7s %s\n", "", pathname);
+	}
+	free(pathname);
+	nvlist_free(nverrlist);
+}
+
+static void
+print_spares(zpool_handle_t *zhp, status_cbdata_t *cb, nvlist_t **spares,
+    uint_t nspares)
+{
+	uint_t i;
+	char *name;
+
+	if (nspares == 0)
+		return;
+
+	(void) printf(gettext("\tspares\n"));
+
+	for (i = 0; i < nspares; i++) {
+		name = zpool_vdev_name(g_zfs, zhp, spares[i],
+		    cb->cb_name_flags);
+		print_status_config(zhp, cb, name, spares[i], 2, B_TRUE, NULL);
+		free(name);
+	}
+}
+
+static void
+print_l2cache(zpool_handle_t *zhp, status_cbdata_t *cb, nvlist_t **l2cache,
+    uint_t nl2cache)
+{
+	uint_t i;
+	char *name;
+
+	if (nl2cache == 0)
+		return;
+
+	(void) printf(gettext("\tcache\n"));
+
+	for (i = 0; i < nl2cache; i++) {
+		name = zpool_vdev_name(g_zfs, zhp, l2cache[i],
+		    cb->cb_name_flags);
+		print_status_config(zhp, cb, name, l2cache[i], 2,
+		    B_FALSE, NULL);
+		free(name);
+	}
+}
+
+static void
+print_dedup_stats(nvlist_t *config)
+{
+	ddt_histogram_t *ddh;
+	ddt_stat_t *dds;
+	ddt_object_t *ddo;
+	uint_t c;
+	char dspace[6], mspace[6];
+
+	/*
+	 * If the pool was faulted then we may not have been able to
+	 * obtain the config. Otherwise, if we have anything in the dedup
+	 * table continue processing the stats.
+	 */
+	if (nvlist_lookup_uint64_array(config, ZPOOL_CONFIG_DDT_OBJ_STATS,
+	    (uint64_t **)&ddo, &c) != 0)
+		return;
+
+	(void) printf("\n");
+	(void) printf(gettext(" dedup: "));
+	if (ddo->ddo_count == 0) {
+		(void) printf(gettext("no DDT entries\n"));
+		return;
+	}
+
+	zfs_nicebytes(ddo->ddo_dspace, dspace, sizeof (dspace));
+	zfs_nicebytes(ddo->ddo_mspace, mspace, sizeof (mspace));
+	(void) printf("DDT entries %llu, size %s on disk, %s in core\n",
+	    (u_longlong_t)ddo->ddo_count,
+	    dspace,
+	    mspace);
+
+	verify(nvlist_lookup_uint64_array(config, ZPOOL_CONFIG_DDT_STATS,
+	    (uint64_t **)&dds, &c) == 0);
+	verify(nvlist_lookup_uint64_array(config, ZPOOL_CONFIG_DDT_HISTOGRAM,
+	    (uint64_t **)&ddh, &c) == 0);
+	zpool_dump_ddt(dds, ddh);
+}
+
+/*
+ * Display a summary of pool status.  Displays a summary such as:
+ *
+ *        pool: tank
+ *	status: DEGRADED
+ *	reason: One or more devices ...
+ *         see: https://zfsonlinux.org/msg/ZFS-xxxx-01
+ *	config:
+ *		mirror		DEGRADED
+ *                c1t0d0	OK
+ *                c2t0d0	UNAVAIL
+ *
+ * When given the '-v' option, we print out the complete config.  If the '-e'
+ * option is specified, then we print out error rate information as well.
+ */
+static int
+status_callback(zpool_handle_t *zhp, void *data)
+{
+	status_cbdata_t *cbp = data;
+	nvlist_t *config, *nvroot;
+	char *msgid;
+	zpool_status_t reason;
+	zpool_errata_t errata;
+	const char *health;
+	uint_t c;
+	vdev_stat_t *vs;
+
+	config = zpool_get_config(zhp, NULL);
+	reason = zpool_get_status(zhp, &msgid, &errata);
+
+	cbp->cb_count++;
+
+	/*
+	 * If we were given 'zpool status -x', only report those pools with
+	 * problems.
+	 */
+	if (cbp->cb_explain &&
+	    (reason == ZPOOL_STATUS_OK ||
+	    reason == ZPOOL_STATUS_VERSION_OLDER ||
+	    reason == ZPOOL_STATUS_FEAT_DISABLED)) {
+		if (!cbp->cb_allpools) {
+			(void) printf(gettext("pool '%s' is healthy\n"),
+			    zpool_get_name(zhp));
+			if (cbp->cb_first)
+				cbp->cb_first = B_FALSE;
+		}
+		return (0);
+	}
+
+	if (cbp->cb_first)
+		cbp->cb_first = B_FALSE;
+	else
+		(void) printf("\n");
+
+	nvroot = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE);
+	verify(nvlist_lookup_uint64_array(nvroot, ZPOOL_CONFIG_VDEV_STATS,
+	    (uint64_t **)&vs, &c) == 0);
+
+	health = zpool_get_state_str(zhp);
+
+	printf("  ");
+	printf_color(ANSI_BOLD, gettext("pool:"));
+	printf(" %s\n", zpool_get_name(zhp));
+	printf(" ");
+	printf_color(ANSI_BOLD, gettext("state: "));
+
+	printf_color(health_str_to_color(health), "%s", health);
+
+	printf("\n");
+
+	switch (reason) {
+	case ZPOOL_STATUS_MISSING_DEV_R:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices could "
+		    "not be opened.  Sufficient replicas exist for\n\tthe pool "
+		    "to continue functioning in a degraded state.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Attach the missing device "
+		    "and online it using 'zpool online'.\n"));
+		break;
+
+	case ZPOOL_STATUS_MISSING_DEV_NR:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices could "
+		    "not be opened.  There are insufficient\n\treplicas for the"
+		    " pool to continue functioning.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Attach the missing device "
+		    "and online it using 'zpool online'.\n"));
+		break;
+
+	case ZPOOL_STATUS_CORRUPT_LABEL_R:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices could "
+		    "not be used because the label is missing or\n\tinvalid.  "
+		    "Sufficient replicas exist for the pool to continue\n\t"
+		    "functioning in a degraded state.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Replace the device using "
+		    "'zpool replace'.\n"));
+		break;
+
+	case ZPOOL_STATUS_CORRUPT_LABEL_NR:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices could "
+		    "not be used because the label is missing \n\tor invalid.  "
+		    "There are insufficient replicas for the pool to "
+		    "continue\n\tfunctioning.\n"));
+		zpool_explain_recover(zpool_get_handle(zhp),
+		    zpool_get_name(zhp), reason, config);
+		break;
+
+	case ZPOOL_STATUS_FAILING_DEV:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices has "
+		    "experienced an unrecoverable error.  An\n\tattempt was "
+		    "made to correct the error.  Applications are "
+		    "unaffected.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+			printf_color(ANSI_YELLOW, gettext("Determine if the "
+		    "device needs to be replaced, and clear the errors\n\tusing"
+		    " 'zpool clear' or replace the device with 'zpool "
+		    "replace'.\n"));
+		break;
+
+	case ZPOOL_STATUS_OFFLINE_DEV:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices has "
+		    "been taken offline by the administrator.\n\tSufficient "
+		    "replicas exist for the pool to continue functioning in "
+		    "a\n\tdegraded state.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Online the device "
+		    "using 'zpool online' or replace the device with\n\t'zpool "
+		    "replace'.\n"));
+		break;
+
+	case ZPOOL_STATUS_REMOVED_DEV:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices has "
+		    "been removed by the administrator.\n\tSufficient "
+		    "replicas exist for the pool to continue functioning in "
+		    "a\n\tdegraded state.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Online the device "
+		    "using zpool online' or replace the device with\n\t'zpool "
+		    "replace'.\n"));
+		break;
+
+	case ZPOOL_STATUS_RESILVERING:
+	case ZPOOL_STATUS_REBUILDING:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices is "
+		    "currently being resilvered.  The pool will\n\tcontinue "
+		    "to function, possibly in a degraded state.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Wait for the resilver to "
+		    "complete.\n"));
+		break;
+
+	case ZPOOL_STATUS_REBUILD_SCRUB:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices have "
+		    "been sequentially resilvered, scrubbing\n\tthe pool "
+		    "is recommended.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Use 'zpool scrub' to "
+		    "verify all data checksums.\n"));
+		break;
+
+	case ZPOOL_STATUS_CORRUPT_DATA:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices has "
+		    "experienced an error resulting in data\n\tcorruption.  "
+		    "Applications may be affected.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Restore the file in question"
+		    " if possible.  Otherwise restore the\n\tentire pool from "
+		    "backup.\n"));
+		break;
+
+	case ZPOOL_STATUS_CORRUPT_POOL:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool metadata is "
+		    "corrupted and the pool cannot be opened.\n"));
+		zpool_explain_recover(zpool_get_handle(zhp),
+		    zpool_get_name(zhp), reason, config);
+		break;
+
+	case ZPOOL_STATUS_VERSION_OLDER:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool is formatted using "
+		    "a legacy on-disk format.  The pool can\n\tstill be used, "
+		    "but some features are unavailable.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Upgrade the pool using "
+		    "'zpool upgrade'.  Once this is done, the\n\tpool will no "
+		    "longer be accessible on software that does not support\n\t"
+		    "feature flags.\n"));
+		break;
+
+	case ZPOOL_STATUS_VERSION_NEWER:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool has been upgraded "
+		    "to a newer, incompatible on-disk version.\n\tThe pool "
+		    "cannot be accessed on this system.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Access the pool from a "
+		    "system running more recent software, or\n\trestore the "
+		    "pool from backup.\n"));
+		break;
+
+	case ZPOOL_STATUS_FEAT_DISABLED:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("Some supported features are "
+		    "not enabled on the pool. The pool can\n\tstill be used, "
+		    "but some features are unavailable.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Enable all features using "
+		    "'zpool upgrade'. Once this is done,\n\tthe pool may no "
+		    "longer be accessible by software that does not support\n\t"
+		    "the features. See zpool-features(5) for details.\n"));
+		break;
+
+	case ZPOOL_STATUS_UNSUP_FEAT_READ:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool cannot be accessed "
+		    "on this system because it uses the\n\tfollowing feature(s)"
+		    " not supported on this system:\n"));
+		zpool_print_unsup_feat(config);
+		(void) printf("\n");
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Access the pool from a "
+		    "system that supports the required feature(s),\n\tor "
+		    "restore the pool from backup.\n"));
+		break;
+
+	case ZPOOL_STATUS_UNSUP_FEAT_WRITE:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool can only be "
+		    "accessed in read-only mode on this system. It\n\tcannot be"
+		    " accessed in read-write mode because it uses the "
+		    "following\n\tfeature(s) not supported on this system:\n"));
+		zpool_print_unsup_feat(config);
+		(void) printf("\n");
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("The pool cannot be accessed "
+		    "in read-write mode. Import the pool with\n"
+		    "\t\"-o readonly=on\", access the pool from a system that "
+		    "supports the\n\trequired feature(s), or restore the "
+		    "pool from backup.\n"));
+		break;
+
+	case ZPOOL_STATUS_FAULTED_DEV_R:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices are "
+		    "faulted in response to persistent errors.\n\tSufficient "
+		    "replicas exist for the pool to continue functioning "
+		    "in a\n\tdegraded state.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Replace the faulted device, "
+		    "or use 'zpool clear' to mark the device\n\trepaired.\n"));
+		break;
+
+	case ZPOOL_STATUS_FAULTED_DEV_NR:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices are "
+		    "faulted in response to persistent errors.  There are "
+		    "insufficient replicas for the pool to\n\tcontinue "
+		    "functioning.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Destroy and re-create the "
+		    "pool from a backup source.  Manually marking the device\n"
+		    "\trepaired using 'zpool clear' may allow some data "
+		    "to be recovered.\n"));
+		break;
+
+	case ZPOOL_STATUS_IO_FAILURE_MMP:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("The pool is suspended "
+		    "because multihost writes failed or were delayed;\n\t"
+		    "another system could import the pool undetected.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Make sure the pool's devices"
+		    " are connected, then reboot your system and\n\timport the "
+		    "pool.\n"));
+		break;
+
+	case ZPOOL_STATUS_IO_FAILURE_WAIT:
+	case ZPOOL_STATUS_IO_FAILURE_CONTINUE:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("One or more devices are "
+		    "faulted in response to IO failures.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Make sure the affected "
+		    "devices are connected, then run 'zpool clear'.\n"));
+		break;
+
+	case ZPOOL_STATUS_BAD_LOG:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("An intent log record "
+		    "could not be read.\n"
+		    "\tWaiting for administrator intervention to fix the "
+		    "faulted pool.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Either restore the affected "
+		    "device(s) and run 'zpool online',\n"
+		    "\tor ignore the intent log records by running "
+		    "'zpool clear'.\n"));
+		break;
+
+	case ZPOOL_STATUS_NON_NATIVE_ASHIFT:
+		(void) printf(gettext("status: One or more devices are "
+		    "configured to use a non-native block size.\n"
+		    "\tExpect reduced performance.\n"));
+		(void) printf(gettext("action: Replace affected devices with "
+		    "devices that support the\n\tconfigured block size, or "
+		    "migrate data to a properly configured\n\tpool.\n"));
+		break;
+
+	case ZPOOL_STATUS_HOSTID_MISMATCH:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("Mismatch between pool hostid"
+		    " and system hostid on imported pool.\n\tThis pool was "
+		    "previously imported into a system with a different "
+		    "hostid,\n\tand then was verbatim imported into this "
+		    "system.\n"));
+		printf_color(ANSI_BOLD, gettext("action: "));
+		printf_color(ANSI_YELLOW, gettext("Export this pool on all "
+		    "systems on which it is imported.\n"
+		    "\tThen import it to correct the mismatch.\n"));
+		break;
+
+	case ZPOOL_STATUS_ERRATA:
+		printf_color(ANSI_BOLD, gettext("status: "));
+		printf_color(ANSI_YELLOW, gettext("Errata #%d detected.\n"),
+		    errata);
+
+		switch (errata) {
+		case ZPOOL_ERRATA_NONE:
+			break;
+
+		case ZPOOL_ERRATA_ZOL_2094_SCRUB:
+			printf_color(ANSI_BOLD, gettext("action: "));
+			printf_color(ANSI_YELLOW, gettext("To correct the issue"
+			    " run 'zpool scrub'.\n"));
+			break;
+
+		case ZPOOL_ERRATA_ZOL_6845_ENCRYPTION:
+			(void) printf(gettext("\tExisting encrypted datasets "
+			    "contain an on-disk incompatibility\n\twhich "
+			    "needs to be corrected.\n"));
+			printf_color(ANSI_BOLD, gettext("action: "));
+			printf_color(ANSI_YELLOW, gettext("To correct the issue"
+			    " backup existing encrypted datasets to new\n\t"
+			    "encrypted datasets and destroy the old ones. "
+			    "'zfs mount -o ro' can\n\tbe used to temporarily "
+			    "mount existing encrypted datasets readonly.\n"));
+			break;
+
+		case ZPOOL_ERRATA_ZOL_8308_ENCRYPTION:
+			(void) printf(gettext("\tExisting encrypted snapshots "
+			    "and bookmarks contain an on-disk\n\tincompat"
+			    "ibility. This may cause on-disk corruption if "
+			    "they are used\n\twith 'zfs recv'.\n"));
+			printf_color(ANSI_BOLD, gettext("action: "));
+			printf_color(ANSI_YELLOW, gettext("To correct the"
+			    "issue, enable the bookmark_v2 feature. No "
+			    "additional\n\taction is needed if there are no "
+			    "encrypted snapshots or bookmarks.\n\tIf preserving"
+			    "the encrypted snapshots and bookmarks is required,"
+			    " use\n\ta non-raw send to backup and restore them."
+			    " Alternately, they may be\n\tremoved to resolve "
+			    "the incompatibility.\n"));
+			break;
+
+		default:
+			/*
+			 * All errata which allow the pool to be imported
+			 * must contain an action message.
+			 */
+			assert(0);
+		}
+		break;
+
+	default:
+		/*
+		 * The remaining errors can't actually be generated, yet.
+		 */
+		assert(reason == ZPOOL_STATUS_OK);
+	}
+
+	if (msgid != NULL) {
+		printf("   ");
+		printf_color(ANSI_BOLD, gettext("see:"));
+		printf(gettext(" https://zfsonlinux.org/msg/%s\n"), msgid);
+	}
+
+	if (config != NULL) {
+		uint64_t nerr;
+		nvlist_t **spares, **l2cache;
+		uint_t nspares, nl2cache;
+		pool_checkpoint_stat_t *pcs = NULL;
+		pool_removal_stat_t *prs = NULL;
+
+		print_scan_status(zhp, nvroot);
+
+		(void) nvlist_lookup_uint64_array(nvroot,
+		    ZPOOL_CONFIG_REMOVAL_STATS, (uint64_t **)&prs, &c);
+		print_removal_status(zhp, prs);
+
+		(void) nvlist_lookup_uint64_array(nvroot,
+		    ZPOOL_CONFIG_CHECKPOINT_STATS, (uint64_t **)&pcs, &c);
+		print_checkpoint_status(pcs);
+
+		cbp->cb_namewidth = max_width(zhp, nvroot, 0, 0,
+		    cbp->cb_name_flags | VDEV_NAME_TYPE_ID);
+		if (cbp->cb_namewidth < 10)
+			cbp->cb_namewidth = 10;
+
+		color_start(ANSI_BOLD);
+		(void) printf(gettext("config:\n\n"));
+		(void) printf(gettext("\t%-*s  %-8s %5s %5s %5s"),
+		    cbp->cb_namewidth, "NAME", "STATE", "READ", "WRITE",
+		    "CKSUM");
+		color_end();
+
+		if (cbp->cb_print_slow_ios) {
+			printf_color(ANSI_BOLD, " %5s", gettext("SLOW"));
+		}
+
+		if (cbp->vcdl != NULL)
+			print_cmd_columns(cbp->vcdl, 0);
+
+		printf("\n");
+
+		print_status_config(zhp, cbp, zpool_get_name(zhp), nvroot, 0,
+		    B_FALSE, NULL);
+
+		print_class_vdevs(zhp, cbp, nvroot, VDEV_ALLOC_BIAS_DEDUP);
+		print_class_vdevs(zhp, cbp, nvroot, VDEV_ALLOC_BIAS_SPECIAL);
+		print_class_vdevs(zhp, cbp, nvroot, VDEV_ALLOC_CLASS_LOGS);
+
+		if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
+		    &l2cache, &nl2cache) == 0)
+			print_l2cache(zhp, cbp, l2cache, nl2cache);
+
+		if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
+		    &spares, &nspares) == 0)
+			print_spares(zhp, cbp, spares, nspares);
+
+		if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_ERRCOUNT,
+		    &nerr) == 0) {
+			nvlist_t *nverrlist = NULL;
+
+			/*
+			 * If the approximate error count is small, get a
+			 * precise count by fetching the entire log and
+			 * uniquifying the results.
+			 */
+			if (nerr > 0 && nerr < 100 && !cbp->cb_verbose &&
+			    zpool_get_errlog(zhp, &nverrlist) == 0) {
+				nvpair_t *elem;
+
+				elem = NULL;
+				nerr = 0;
+				while ((elem = nvlist_next_nvpair(nverrlist,
+				    elem)) != NULL) {
+					nerr++;
+				}
+			}
+			nvlist_free(nverrlist);
+
+			(void) printf("\n");
+
+			if (nerr == 0)
+				(void) printf(gettext("errors: No known data "
+				    "errors\n"));
+			else if (!cbp->cb_verbose)
+				(void) printf(gettext("errors: %llu data "
+				    "errors, use '-v' for a list\n"),
+				    (u_longlong_t)nerr);
+			else
+				print_error_log(zhp);
+		}
+
+		if (cbp->cb_dedup_stats)
+			print_dedup_stats(config);
+	} else {
+		(void) printf(gettext("config: The configuration cannot be "
+		    "determined.\n"));
+	}
+
+	return (0);
+}
+
+/*
+ * zpool status [-c [script1,script2,...]] [-igLpPstvx] [-T d|u] [pool] ...
+ *              [interval [count]]
+ *
+ *	-c CMD	For each vdev, run command CMD
+ *	-i	Display vdev initialization status.
+ *	-g	Display guid for individual vdev name.
+ *	-L	Follow links when resolving vdev path name.
+ *	-p	Display values in parsable (exact) format.
+ *	-P	Display full path for vdev name.
+ *	-s	Display slow IOs column.
+ *	-v	Display complete error logs
+ *	-x	Display only pools with potential problems
+ *	-D	Display dedup status (undocumented)
+ *	-t	Display vdev TRIM status.
+ *	-T	Display a timestamp in date(1) or Unix format
+ *
+ * Describes the health status of all pools or some subset.
+ */
+int
+zpool_do_status(int argc, char **argv)
+{
+	int c;
+	int ret;
+	float interval = 0;
+	unsigned long count = 0;
+	status_cbdata_t cb = { 0 };
+	char *cmd = NULL;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "c:igLpPsvxDtT:")) != -1) {
+		switch (c) {
+		case 'c':
+			if (cmd != NULL) {
+				fprintf(stderr,
+				    gettext("Can't set -c flag twice\n"));
+				exit(1);
+			}
+
+			if (getenv("ZPOOL_SCRIPTS_ENABLED") != NULL &&
+			    !libzfs_envvar_is_set("ZPOOL_SCRIPTS_ENABLED")) {
+				fprintf(stderr, gettext(
+				    "Can't run -c, disabled by "
+				    "ZPOOL_SCRIPTS_ENABLED.\n"));
+				exit(1);
+			}
+
+			if ((getuid() <= 0 || geteuid() <= 0) &&
+			    !libzfs_envvar_is_set("ZPOOL_SCRIPTS_AS_ROOT")) {
+				fprintf(stderr, gettext(
+				    "Can't run -c with root privileges "
+				    "unless ZPOOL_SCRIPTS_AS_ROOT is set.\n"));
+				exit(1);
+			}
+			cmd = optarg;
+			break;
+		case 'i':
+			cb.cb_print_vdev_init = B_TRUE;
+			break;
+		case 'g':
+			cb.cb_name_flags |= VDEV_NAME_GUID;
+			break;
+		case 'L':
+			cb.cb_name_flags |= VDEV_NAME_FOLLOW_LINKS;
+			break;
+		case 'p':
+			cb.cb_literal = B_TRUE;
+			break;
+		case 'P':
+			cb.cb_name_flags |= VDEV_NAME_PATH;
+			break;
+		case 's':
+			cb.cb_print_slow_ios = B_TRUE;
+			break;
+		case 'v':
+			cb.cb_verbose = B_TRUE;
+			break;
+		case 'x':
+			cb.cb_explain = B_TRUE;
+			break;
+		case 'D':
+			cb.cb_dedup_stats = B_TRUE;
+			break;
+		case 't':
+			cb.cb_print_vdev_trim = B_TRUE;
+			break;
+		case 'T':
+			get_timestamp_arg(*optarg);
+			break;
+		case '?':
+			if (optopt == 'c') {
+				print_zpool_script_list("status");
+				exit(0);
+			} else {
+				fprintf(stderr,
+				    gettext("invalid option '%c'\n"), optopt);
+			}
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	get_interval_count(&argc, argv, &interval, &count);
+
+	if (argc == 0)
+		cb.cb_allpools = B_TRUE;
+
+	cb.cb_first = B_TRUE;
+	cb.cb_print_status = B_TRUE;
+
+	for (;;) {
+		if (timestamp_fmt != NODATE)
+			print_timestamp(timestamp_fmt);
+
+		if (cmd != NULL)
+			cb.vcdl = all_pools_for_each_vdev_run(argc, argv, cmd,
+			    NULL, NULL, 0, 0);
+
+		ret = for_each_pool(argc, argv, B_TRUE, NULL,
+		    status_callback, &cb);
+
+		if (cb.vcdl != NULL)
+			free_vdev_cmd_data_list(cb.vcdl);
+
+		if (argc == 0 && cb.cb_count == 0)
+			(void) fprintf(stderr, gettext("no pools available\n"));
+		else if (cb.cb_explain && cb.cb_first && cb.cb_allpools)
+			(void) printf(gettext("all pools are healthy\n"));
+
+		if (ret != 0)
+			return (ret);
+
+		if (interval == 0)
+			break;
+
+		if (count != 0 && --count == 0)
+			break;
+
+		(void) fsleep(interval);
+	}
+
+	return (0);
+}
+
+typedef struct upgrade_cbdata {
+	int	cb_first;
+	int	cb_argc;
+	uint64_t cb_version;
+	char	**cb_argv;
+} upgrade_cbdata_t;
+
+static int
+check_unsupp_fs(zfs_handle_t *zhp, void *unsupp_fs)
+{
+	int zfs_version = (int)zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
+	int *count = (int *)unsupp_fs;
+
+	if (zfs_version > ZPL_VERSION) {
+		(void) printf(gettext("%s (v%d) is not supported by this "
+		    "implementation of ZFS.\n"),
+		    zfs_get_name(zhp), zfs_version);
+		(*count)++;
+	}
+
+	zfs_iter_filesystems(zhp, check_unsupp_fs, unsupp_fs);
+
+	zfs_close(zhp);
+
+	return (0);
+}
+
+static int
+upgrade_version(zpool_handle_t *zhp, uint64_t version)
+{
+	int ret;
+	nvlist_t *config;
+	uint64_t oldversion;
+	int unsupp_fs = 0;
+
+	config = zpool_get_config(zhp, NULL);
+	verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
+	    &oldversion) == 0);
+
+	assert(SPA_VERSION_IS_SUPPORTED(oldversion));
+	assert(oldversion < version);
+
+	ret = zfs_iter_root(zpool_get_handle(zhp), check_unsupp_fs, &unsupp_fs);
+	if (ret != 0)
+		return (ret);
+
+	if (unsupp_fs) {
+		(void) fprintf(stderr, gettext("Upgrade not performed due "
+		    "to %d unsupported filesystems (max v%d).\n"),
+		    unsupp_fs, (int)ZPL_VERSION);
+		return (1);
+	}
+
+	ret = zpool_upgrade(zhp, version);
+	if (ret != 0)
+		return (ret);
+
+	if (version >= SPA_VERSION_FEATURES) {
+		(void) printf(gettext("Successfully upgraded "
+		    "'%s' from version %llu to feature flags.\n"),
+		    zpool_get_name(zhp), (u_longlong_t)oldversion);
+	} else {
+		(void) printf(gettext("Successfully upgraded "
+		    "'%s' from version %llu to version %llu.\n"),
+		    zpool_get_name(zhp), (u_longlong_t)oldversion,
+		    (u_longlong_t)version);
+	}
+
+	return (0);
+}
+
+static int
+upgrade_enable_all(zpool_handle_t *zhp, int *countp)
+{
+	int i, ret, count;
+	boolean_t firstff = B_TRUE;
+	nvlist_t *enabled = zpool_get_features(zhp);
+
+	count = 0;
+	for (i = 0; i < SPA_FEATURES; i++) {
+		const char *fname = spa_feature_table[i].fi_uname;
+		const char *fguid = spa_feature_table[i].fi_guid;
+		if (!nvlist_exists(enabled, fguid)) {
+			char *propname;
+			verify(-1 != asprintf(&propname, "feature@%s", fname));
+			ret = zpool_set_prop(zhp, propname,
+			    ZFS_FEATURE_ENABLED);
+			if (ret != 0) {
+				free(propname);
+				return (ret);
+			}
+			count++;
+
+			if (firstff) {
+				(void) printf(gettext("Enabled the "
+				    "following features on '%s':\n"),
+				    zpool_get_name(zhp));
+				firstff = B_FALSE;
+			}
+			(void) printf(gettext("  %s\n"), fname);
+			free(propname);
+		}
+	}
+
+	if (countp != NULL)
+		*countp = count;
+	return (0);
+}
+
+static int
+upgrade_cb(zpool_handle_t *zhp, void *arg)
+{
+	upgrade_cbdata_t *cbp = arg;
+	nvlist_t *config;
+	uint64_t version;
+	boolean_t printnl = B_FALSE;
+	int ret;
+
+	config = zpool_get_config(zhp, NULL);
+	verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
+	    &version) == 0);
+
+	assert(SPA_VERSION_IS_SUPPORTED(version));
+
+	if (version < cbp->cb_version) {
+		cbp->cb_first = B_FALSE;
+		ret = upgrade_version(zhp, cbp->cb_version);
+		if (ret != 0)
+			return (ret);
+		printnl = B_TRUE;
+
+		/*
+		 * If they did "zpool upgrade -a", then we could
+		 * be doing ioctls to different pools.  We need
+		 * to log this history once to each pool, and bypass
+		 * the normal history logging that happens in main().
+		 */
+		(void) zpool_log_history(g_zfs, history_str);
+		log_history = B_FALSE;
+	}
+
+	if (cbp->cb_version >= SPA_VERSION_FEATURES) {
+		int count;
+		ret = upgrade_enable_all(zhp, &count);
+		if (ret != 0)
+			return (ret);
+
+		if (count > 0) {
+			cbp->cb_first = B_FALSE;
+			printnl = B_TRUE;
+		}
+	}
+
+	if (printnl) {
+		(void) printf(gettext("\n"));
+	}
+
+	return (0);
+}
+
+static int
+upgrade_list_older_cb(zpool_handle_t *zhp, void *arg)
+{
+	upgrade_cbdata_t *cbp = arg;
+	nvlist_t *config;
+	uint64_t version;
+
+	config = zpool_get_config(zhp, NULL);
+	verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
+	    &version) == 0);
+
+	assert(SPA_VERSION_IS_SUPPORTED(version));
+
+	if (version < SPA_VERSION_FEATURES) {
+		if (cbp->cb_first) {
+			(void) printf(gettext("The following pools are "
+			    "formatted with legacy version numbers and can\n"
+			    "be upgraded to use feature flags.  After "
+			    "being upgraded, these pools\nwill no "
+			    "longer be accessible by software that does not "
+			    "support feature\nflags.\n\n"));
+			(void) printf(gettext("VER  POOL\n"));
+			(void) printf(gettext("---  ------------\n"));
+			cbp->cb_first = B_FALSE;
+		}
+
+		(void) printf("%2llu   %s\n", (u_longlong_t)version,
+		    zpool_get_name(zhp));
+	}
+
+	return (0);
+}
+
+static int
+upgrade_list_disabled_cb(zpool_handle_t *zhp, void *arg)
+{
+	upgrade_cbdata_t *cbp = arg;
+	nvlist_t *config;
+	uint64_t version;
+
+	config = zpool_get_config(zhp, NULL);
+	verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
+	    &version) == 0);
+
+	if (version >= SPA_VERSION_FEATURES) {
+		int i;
+		boolean_t poolfirst = B_TRUE;
+		nvlist_t *enabled = zpool_get_features(zhp);
+
+		for (i = 0; i < SPA_FEATURES; i++) {
+			const char *fguid = spa_feature_table[i].fi_guid;
+			const char *fname = spa_feature_table[i].fi_uname;
+			if (!nvlist_exists(enabled, fguid)) {
+				if (cbp->cb_first) {
+					(void) printf(gettext("\nSome "
+					    "supported features are not "
+					    "enabled on the following pools. "
+					    "Once a\nfeature is enabled the "
+					    "pool may become incompatible with "
+					    "software\nthat does not support "
+					    "the feature. See "
+					    "zpool-features(5) for "
+					    "details.\n\n"));
+					(void) printf(gettext("POOL  "
+					    "FEATURE\n"));
+					(void) printf(gettext("------"
+					    "---------\n"));
+					cbp->cb_first = B_FALSE;
+				}
+
+				if (poolfirst) {
+					(void) printf(gettext("%s\n"),
+					    zpool_get_name(zhp));
+					poolfirst = B_FALSE;
+				}
+
+				(void) printf(gettext("      %s\n"), fname);
+			}
+			/*
+			 * If they did "zpool upgrade -a", then we could
+			 * be doing ioctls to different pools.  We need
+			 * to log this history once to each pool, and bypass
+			 * the normal history logging that happens in main().
+			 */
+			(void) zpool_log_history(g_zfs, history_str);
+			log_history = B_FALSE;
+		}
+	}
+
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+upgrade_one(zpool_handle_t *zhp, void *data)
+{
+	boolean_t printnl = B_FALSE;
+	upgrade_cbdata_t *cbp = data;
+	uint64_t cur_version;
+	int ret;
+
+	if (strcmp("log", zpool_get_name(zhp)) == 0) {
+		(void) fprintf(stderr, gettext("'log' is now a reserved word\n"
+		    "Pool 'log' must be renamed using export and import"
+		    " to upgrade.\n"));
+		return (1);
+	}
+
+	cur_version = zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL);
+	if (cur_version > cbp->cb_version) {
+		(void) printf(gettext("Pool '%s' is already formatted "
+		    "using more current version '%llu'.\n\n"),
+		    zpool_get_name(zhp), (u_longlong_t)cur_version);
+		return (0);
+	}
+
+	if (cbp->cb_version != SPA_VERSION && cur_version == cbp->cb_version) {
+		(void) printf(gettext("Pool '%s' is already formatted "
+		    "using version %llu.\n\n"), zpool_get_name(zhp),
+		    (u_longlong_t)cbp->cb_version);
+		return (0);
+	}
+
+	if (cur_version != cbp->cb_version) {
+		printnl = B_TRUE;
+		ret = upgrade_version(zhp, cbp->cb_version);
+		if (ret != 0)
+			return (ret);
+	}
+
+	if (cbp->cb_version >= SPA_VERSION_FEATURES) {
+		int count = 0;
+		ret = upgrade_enable_all(zhp, &count);
+		if (ret != 0)
+			return (ret);
+
+		if (count != 0) {
+			printnl = B_TRUE;
+		} else if (cur_version == SPA_VERSION) {
+			(void) printf(gettext("Pool '%s' already has all "
+			    "supported features enabled.\n"),
+			    zpool_get_name(zhp));
+		}
+	}
+
+	if (printnl) {
+		(void) printf(gettext("\n"));
+	}
+
+	return (0);
+}
+
+/*
+ * zpool upgrade
+ * zpool upgrade -v
+ * zpool upgrade [-V version] <-a | pool ...>
+ *
+ * With no arguments, display downrev'd ZFS pool available for upgrade.
+ * Individual pools can be upgraded by specifying the pool, and '-a' will
+ * upgrade all pools.
+ */
+int
+zpool_do_upgrade(int argc, char **argv)
+{
+	int c;
+	upgrade_cbdata_t cb = { 0 };
+	int ret = 0;
+	boolean_t showversions = B_FALSE;
+	boolean_t upgradeall = B_FALSE;
+	char *end;
+
+
+	/* check options */
+	while ((c = getopt(argc, argv, ":avV:")) != -1) {
+		switch (c) {
+		case 'a':
+			upgradeall = B_TRUE;
+			break;
+		case 'v':
+			showversions = B_TRUE;
+			break;
+		case 'V':
+			cb.cb_version = strtoll(optarg, &end, 10);
+			if (*end != '\0' ||
+			    !SPA_VERSION_IS_SUPPORTED(cb.cb_version)) {
+				(void) fprintf(stderr,
+				    gettext("invalid version '%s'\n"), optarg);
+				usage(B_FALSE);
+			}
+			break;
+		case ':':
+			(void) fprintf(stderr, gettext("missing argument for "
+			    "'%c' option\n"), optopt);
+			usage(B_FALSE);
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	cb.cb_argc = argc;
+	cb.cb_argv = argv;
+	argc -= optind;
+	argv += optind;
+
+	if (cb.cb_version == 0) {
+		cb.cb_version = SPA_VERSION;
+	} else if (!upgradeall && argc == 0) {
+		(void) fprintf(stderr, gettext("-V option is "
+		    "incompatible with other arguments\n"));
+		usage(B_FALSE);
+	}
+
+	if (showversions) {
+		if (upgradeall || argc != 0) {
+			(void) fprintf(stderr, gettext("-v option is "
+			    "incompatible with other arguments\n"));
+			usage(B_FALSE);
+		}
+	} else if (upgradeall) {
+		if (argc != 0) {
+			(void) fprintf(stderr, gettext("-a option should not "
+			    "be used along with a pool name\n"));
+			usage(B_FALSE);
+		}
+	}
+
+	(void) printf(gettext("This system supports ZFS pool feature "
+	    "flags.\n\n"));
+	if (showversions) {
+		int i;
+
+		(void) printf(gettext("The following features are "
+		    "supported:\n\n"));
+		(void) printf(gettext("FEAT DESCRIPTION\n"));
+		(void) printf("----------------------------------------------"
+		    "---------------\n");
+		for (i = 0; i < SPA_FEATURES; i++) {
+			zfeature_info_t *fi = &spa_feature_table[i];
+			const char *ro =
+			    (fi->fi_flags & ZFEATURE_FLAG_READONLY_COMPAT) ?
+			    " (read-only compatible)" : "";
+
+			(void) printf("%-37s%s\n", fi->fi_uname, ro);
+			(void) printf("     %s\n", fi->fi_desc);
+		}
+		(void) printf("\n");
+
+		(void) printf(gettext("The following legacy versions are also "
+		    "supported:\n\n"));
+		(void) printf(gettext("VER  DESCRIPTION\n"));
+		(void) printf("---  -----------------------------------------"
+		    "---------------\n");
+		(void) printf(gettext(" 1   Initial ZFS version\n"));
+		(void) printf(gettext(" 2   Ditto blocks "
+		    "(replicated metadata)\n"));
+		(void) printf(gettext(" 3   Hot spares and double parity "
+		    "RAID-Z\n"));
+		(void) printf(gettext(" 4   zpool history\n"));
+		(void) printf(gettext(" 5   Compression using the gzip "
+		    "algorithm\n"));
+		(void) printf(gettext(" 6   bootfs pool property\n"));
+		(void) printf(gettext(" 7   Separate intent log devices\n"));
+		(void) printf(gettext(" 8   Delegated administration\n"));
+		(void) printf(gettext(" 9   refquota and refreservation "
+		    "properties\n"));
+		(void) printf(gettext(" 10  Cache devices\n"));
+		(void) printf(gettext(" 11  Improved scrub performance\n"));
+		(void) printf(gettext(" 12  Snapshot properties\n"));
+		(void) printf(gettext(" 13  snapused property\n"));
+		(void) printf(gettext(" 14  passthrough-x aclinherit\n"));
+		(void) printf(gettext(" 15  user/group space accounting\n"));
+		(void) printf(gettext(" 16  stmf property support\n"));
+		(void) printf(gettext(" 17  Triple-parity RAID-Z\n"));
+		(void) printf(gettext(" 18  Snapshot user holds\n"));
+		(void) printf(gettext(" 19  Log device removal\n"));
+		(void) printf(gettext(" 20  Compression using zle "
+		    "(zero-length encoding)\n"));
+		(void) printf(gettext(" 21  Deduplication\n"));
+		(void) printf(gettext(" 22  Received properties\n"));
+		(void) printf(gettext(" 23  Slim ZIL\n"));
+		(void) printf(gettext(" 24  System attributes\n"));
+		(void) printf(gettext(" 25  Improved scrub stats\n"));
+		(void) printf(gettext(" 26  Improved snapshot deletion "
+		    "performance\n"));
+		(void) printf(gettext(" 27  Improved snapshot creation "
+		    "performance\n"));
+		(void) printf(gettext(" 28  Multiple vdev replacements\n"));
+		(void) printf(gettext("\nFor more information on a particular "
+		    "version, including supported releases,\n"));
+		(void) printf(gettext("see the ZFS Administration Guide.\n\n"));
+	} else if (argc == 0 && upgradeall) {
+		cb.cb_first = B_TRUE;
+		ret = zpool_iter(g_zfs, upgrade_cb, &cb);
+		if (ret == 0 && cb.cb_first) {
+			if (cb.cb_version == SPA_VERSION) {
+				(void) printf(gettext("All pools are already "
+				    "formatted using feature flags.\n\n"));
+				(void) printf(gettext("Every feature flags "
+				    "pool already has all supported features "
+				    "enabled.\n"));
+			} else {
+				(void) printf(gettext("All pools are already "
+				    "formatted with version %llu or higher.\n"),
+				    (u_longlong_t)cb.cb_version);
+			}
+		}
+	} else if (argc == 0) {
+		cb.cb_first = B_TRUE;
+		ret = zpool_iter(g_zfs, upgrade_list_older_cb, &cb);
+		assert(ret == 0);
+
+		if (cb.cb_first) {
+			(void) printf(gettext("All pools are formatted "
+			    "using feature flags.\n\n"));
+		} else {
+			(void) printf(gettext("\nUse 'zpool upgrade -v' "
+			    "for a list of available legacy versions.\n"));
+		}
+
+		cb.cb_first = B_TRUE;
+		ret = zpool_iter(g_zfs, upgrade_list_disabled_cb, &cb);
+		assert(ret == 0);
+
+		if (cb.cb_first) {
+			(void) printf(gettext("Every feature flags pool has "
+			    "all supported features enabled.\n"));
+		} else {
+			(void) printf(gettext("\n"));
+		}
+	} else {
+		ret = for_each_pool(argc, argv, B_FALSE, NULL,
+		    upgrade_one, &cb);
+	}
+
+	return (ret);
+}
+
+typedef struct hist_cbdata {
+	boolean_t first;
+	boolean_t longfmt;
+	boolean_t internal;
+} hist_cbdata_t;
+
+static void
+print_history_records(nvlist_t *nvhis, hist_cbdata_t *cb)
+{
+	nvlist_t **records;
+	uint_t numrecords;
+	int i;
+
+	verify(nvlist_lookup_nvlist_array(nvhis, ZPOOL_HIST_RECORD,
+	    &records, &numrecords) == 0);
+	for (i = 0; i < numrecords; i++) {
+		nvlist_t *rec = records[i];
+		char tbuf[30] = "";
+
+		if (nvlist_exists(rec, ZPOOL_HIST_TIME)) {
+			time_t tsec;
+			struct tm t;
+
+			tsec = fnvlist_lookup_uint64(records[i],
+			    ZPOOL_HIST_TIME);
+			(void) localtime_r(&tsec, &t);
+			(void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
+		}
+
+		if (nvlist_exists(rec, ZPOOL_HIST_CMD)) {
+			(void) printf("%s %s", tbuf,
+			    fnvlist_lookup_string(rec, ZPOOL_HIST_CMD));
+		} else if (nvlist_exists(rec, ZPOOL_HIST_INT_EVENT)) {
+			int ievent =
+			    fnvlist_lookup_uint64(rec, ZPOOL_HIST_INT_EVENT);
+			if (!cb->internal)
+				continue;
+			if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS) {
+				(void) printf("%s unrecognized record:\n",
+				    tbuf);
+				dump_nvlist(rec, 4);
+				continue;
+			}
+			(void) printf("%s [internal %s txg:%lld] %s", tbuf,
+			    zfs_history_event_names[ievent],
+			    (longlong_t)fnvlist_lookup_uint64(
+			    rec, ZPOOL_HIST_TXG),
+			    fnvlist_lookup_string(rec, ZPOOL_HIST_INT_STR));
+		} else if (nvlist_exists(rec, ZPOOL_HIST_INT_NAME)) {
+			if (!cb->internal)
+				continue;
+			(void) printf("%s [txg:%lld] %s", tbuf,
+			    (longlong_t)fnvlist_lookup_uint64(
+			    rec, ZPOOL_HIST_TXG),
+			    fnvlist_lookup_string(rec, ZPOOL_HIST_INT_NAME));
+			if (nvlist_exists(rec, ZPOOL_HIST_DSNAME)) {
+				(void) printf(" %s (%llu)",
+				    fnvlist_lookup_string(rec,
+				    ZPOOL_HIST_DSNAME),
+				    (u_longlong_t)fnvlist_lookup_uint64(rec,
+				    ZPOOL_HIST_DSID));
+			}
+			(void) printf(" %s", fnvlist_lookup_string(rec,
+			    ZPOOL_HIST_INT_STR));
+		} else if (nvlist_exists(rec, ZPOOL_HIST_IOCTL)) {
+			if (!cb->internal)
+				continue;
+			(void) printf("%s ioctl %s\n", tbuf,
+			    fnvlist_lookup_string(rec, ZPOOL_HIST_IOCTL));
+			if (nvlist_exists(rec, ZPOOL_HIST_INPUT_NVL)) {
+				(void) printf("    input:\n");
+				dump_nvlist(fnvlist_lookup_nvlist(rec,
+				    ZPOOL_HIST_INPUT_NVL), 8);
+			}
+			if (nvlist_exists(rec, ZPOOL_HIST_OUTPUT_NVL)) {
+				(void) printf("    output:\n");
+				dump_nvlist(fnvlist_lookup_nvlist(rec,
+				    ZPOOL_HIST_OUTPUT_NVL), 8);
+			}
+			if (nvlist_exists(rec, ZPOOL_HIST_ERRNO)) {
+				(void) printf("    errno: %lld\n",
+				    (longlong_t)fnvlist_lookup_int64(rec,
+				    ZPOOL_HIST_ERRNO));
+			}
+		} else {
+			if (!cb->internal)
+				continue;
+			(void) printf("%s unrecognized record:\n", tbuf);
+			dump_nvlist(rec, 4);
+		}
+
+		if (!cb->longfmt) {
+			(void) printf("\n");
+			continue;
+		}
+		(void) printf(" [");
+		if (nvlist_exists(rec, ZPOOL_HIST_WHO)) {
+			uid_t who = fnvlist_lookup_uint64(rec, ZPOOL_HIST_WHO);
+			struct passwd *pwd = getpwuid(who);
+			(void) printf("user %d ", (int)who);
+			if (pwd != NULL)
+				(void) printf("(%s) ", pwd->pw_name);
+		}
+		if (nvlist_exists(rec, ZPOOL_HIST_HOST)) {
+			(void) printf("on %s",
+			    fnvlist_lookup_string(rec, ZPOOL_HIST_HOST));
+		}
+		if (nvlist_exists(rec, ZPOOL_HIST_ZONE)) {
+			(void) printf(":%s",
+			    fnvlist_lookup_string(rec, ZPOOL_HIST_ZONE));
+		}
+
+		(void) printf("]");
+		(void) printf("\n");
+	}
+}
+
+/*
+ * Print out the command history for a specific pool.
+ */
+static int
+get_history_one(zpool_handle_t *zhp, void *data)
+{
+	nvlist_t *nvhis;
+	int ret;
+	hist_cbdata_t *cb = (hist_cbdata_t *)data;
+	uint64_t off = 0;
+	boolean_t eof = B_FALSE;
+
+	cb->first = B_FALSE;
+
+	(void) printf(gettext("History for '%s':\n"), zpool_get_name(zhp));
+
+	while (!eof) {
+		if ((ret = zpool_get_history(zhp, &nvhis, &off, &eof)) != 0)
+			return (ret);
+
+		print_history_records(nvhis, cb);
+		nvlist_free(nvhis);
+	}
+	(void) printf("\n");
+
+	return (ret);
+}
+
+/*
+ * zpool history <pool>
+ *
+ * Displays the history of commands that modified pools.
+ */
+int
+zpool_do_history(int argc, char **argv)
+{
+	hist_cbdata_t cbdata = { 0 };
+	int ret;
+	int c;
+
+	cbdata.first = B_TRUE;
+	/* check options */
+	while ((c = getopt(argc, argv, "li")) != -1) {
+		switch (c) {
+		case 'l':
+			cbdata.longfmt = B_TRUE;
+			break;
+		case 'i':
+			cbdata.internal = B_TRUE;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	ret = for_each_pool(argc, argv, B_FALSE,  NULL, get_history_one,
+	    &cbdata);
+
+	if (argc == 0 && cbdata.first == B_TRUE) {
+		(void) fprintf(stderr, gettext("no pools available\n"));
+		return (0);
+	}
+
+	return (ret);
+}
+
+typedef struct ev_opts {
+	int verbose;
+	int scripted;
+	int follow;
+	int clear;
+	char poolname[ZFS_MAX_DATASET_NAME_LEN];
+} ev_opts_t;
+
+static void
+zpool_do_events_short(nvlist_t *nvl, ev_opts_t *opts)
+{
+	char ctime_str[26], str[32], *ptr;
+	int64_t *tv;
+	uint_t n;
+
+	verify(nvlist_lookup_int64_array(nvl, FM_EREPORT_TIME, &tv, &n) == 0);
+	memset(str, ' ', 32);
+	(void) ctime_r((const time_t *)&tv[0], ctime_str);
+	(void) memcpy(str, ctime_str+4,  6);		/* 'Jun 30' */
+	(void) memcpy(str+7, ctime_str+20, 4);		/* '1993' */
+	(void) memcpy(str+12, ctime_str+11, 8);		/* '21:49:08' */
+	(void) sprintf(str+20, ".%09lld", (longlong_t)tv[1]); /* '.123456789' */
+	if (opts->scripted)
+		(void) printf(gettext("%s\t"), str);
+	else
+		(void) printf(gettext("%s "), str);
+
+	verify(nvlist_lookup_string(nvl, FM_CLASS, &ptr) == 0);
+	(void) printf(gettext("%s\n"), ptr);
+}
+
+static void
+zpool_do_events_nvprint(nvlist_t *nvl, int depth)
+{
+	nvpair_t *nvp;
+
+	for (nvp = nvlist_next_nvpair(nvl, NULL);
+	    nvp != NULL; nvp = nvlist_next_nvpair(nvl, nvp)) {
+
+		data_type_t type = nvpair_type(nvp);
+		const char *name = nvpair_name(nvp);
+
+		boolean_t b;
+		uint8_t i8;
+		uint16_t i16;
+		uint32_t i32;
+		uint64_t i64;
+		char *str;
+		nvlist_t *cnv;
+
+		printf(gettext("%*s%s = "), depth, "", name);
+
+		switch (type) {
+		case DATA_TYPE_BOOLEAN:
+			printf(gettext("%s"), "1");
+			break;
+
+		case DATA_TYPE_BOOLEAN_VALUE:
+			(void) nvpair_value_boolean_value(nvp, &b);
+			printf(gettext("%s"), b ? "1" : "0");
+			break;
+
+		case DATA_TYPE_BYTE:
+			(void) nvpair_value_byte(nvp, &i8);
+			printf(gettext("0x%x"), i8);
+			break;
+
+		case DATA_TYPE_INT8:
+			(void) nvpair_value_int8(nvp, (void *)&i8);
+			printf(gettext("0x%x"), i8);
+			break;
+
+		case DATA_TYPE_UINT8:
+			(void) nvpair_value_uint8(nvp, &i8);
+			printf(gettext("0x%x"), i8);
+			break;
+
+		case DATA_TYPE_INT16:
+			(void) nvpair_value_int16(nvp, (void *)&i16);
+			printf(gettext("0x%x"), i16);
+			break;
+
+		case DATA_TYPE_UINT16:
+			(void) nvpair_value_uint16(nvp, &i16);
+			printf(gettext("0x%x"), i16);
+			break;
+
+		case DATA_TYPE_INT32:
+			(void) nvpair_value_int32(nvp, (void *)&i32);
+			printf(gettext("0x%x"), i32);
+			break;
+
+		case DATA_TYPE_UINT32:
+			(void) nvpair_value_uint32(nvp, &i32);
+			printf(gettext("0x%x"), i32);
+			break;
+
+		case DATA_TYPE_INT64:
+			(void) nvpair_value_int64(nvp, (void *)&i64);
+			printf(gettext("0x%llx"), (u_longlong_t)i64);
+			break;
+
+		case DATA_TYPE_UINT64:
+			(void) nvpair_value_uint64(nvp, &i64);
+			/*
+			 * translate vdev state values to readable
+			 * strings to aide zpool events consumers
+			 */
+			if (strcmp(name,
+			    FM_EREPORT_PAYLOAD_ZFS_VDEV_STATE) == 0 ||
+			    strcmp(name,
+			    FM_EREPORT_PAYLOAD_ZFS_VDEV_LASTSTATE) == 0) {
+				printf(gettext("\"%s\" (0x%llx)"),
+				    zpool_state_to_name(i64, VDEV_AUX_NONE),
+				    (u_longlong_t)i64);
+			} else {
+				printf(gettext("0x%llx"), (u_longlong_t)i64);
+			}
+			break;
+
+		case DATA_TYPE_HRTIME:
+			(void) nvpair_value_hrtime(nvp, (void *)&i64);
+			printf(gettext("0x%llx"), (u_longlong_t)i64);
+			break;
+
+		case DATA_TYPE_STRING:
+			(void) nvpair_value_string(nvp, &str);
+			printf(gettext("\"%s\""), str ? str : "<NULL>");
+			break;
+
+		case DATA_TYPE_NVLIST:
+			printf(gettext("(embedded nvlist)\n"));
+			(void) nvpair_value_nvlist(nvp, &cnv);
+			zpool_do_events_nvprint(cnv, depth + 8);
+			printf(gettext("%*s(end %s)"), depth, "", name);
+			break;
+
+		case DATA_TYPE_NVLIST_ARRAY: {
+			nvlist_t **val;
+			uint_t i, nelem;
+
+			(void) nvpair_value_nvlist_array(nvp, &val, &nelem);
+			printf(gettext("(%d embedded nvlists)\n"), nelem);
+			for (i = 0; i < nelem; i++) {
+				printf(gettext("%*s%s[%d] = %s\n"),
+				    depth, "", name, i, "(embedded nvlist)");
+				zpool_do_events_nvprint(val[i], depth + 8);
+				printf(gettext("%*s(end %s[%i])\n"),
+				    depth, "", name, i);
+			}
+			printf(gettext("%*s(end %s)\n"), depth, "", name);
+			}
+			break;
+
+		case DATA_TYPE_INT8_ARRAY: {
+			int8_t *val;
+			uint_t i, nelem;
+
+			(void) nvpair_value_int8_array(nvp, &val, &nelem);
+			for (i = 0; i < nelem; i++)
+				printf(gettext("0x%x "), val[i]);
+
+			break;
+			}
+
+		case DATA_TYPE_UINT8_ARRAY: {
+			uint8_t *val;
+			uint_t i, nelem;
+
+			(void) nvpair_value_uint8_array(nvp, &val, &nelem);
+			for (i = 0; i < nelem; i++)
+				printf(gettext("0x%x "), val[i]);
+
+			break;
+			}
+
+		case DATA_TYPE_INT16_ARRAY: {
+			int16_t *val;
+			uint_t i, nelem;
+
+			(void) nvpair_value_int16_array(nvp, &val, &nelem);
+			for (i = 0; i < nelem; i++)
+				printf(gettext("0x%x "), val[i]);
+
+			break;
+			}
+
+		case DATA_TYPE_UINT16_ARRAY: {
+			uint16_t *val;
+			uint_t i, nelem;
+
+			(void) nvpair_value_uint16_array(nvp, &val, &nelem);
+			for (i = 0; i < nelem; i++)
+				printf(gettext("0x%x "), val[i]);
+
+			break;
+			}
+
+		case DATA_TYPE_INT32_ARRAY: {
+			int32_t *val;
+			uint_t i, nelem;
+
+			(void) nvpair_value_int32_array(nvp, &val, &nelem);
+			for (i = 0; i < nelem; i++)
+				printf(gettext("0x%x "), val[i]);
+
+			break;
+			}
+
+		case DATA_TYPE_UINT32_ARRAY: {
+			uint32_t *val;
+			uint_t i, nelem;
+
+			(void) nvpair_value_uint32_array(nvp, &val, &nelem);
+			for (i = 0; i < nelem; i++)
+				printf(gettext("0x%x "), val[i]);
+
+			break;
+			}
+
+		case DATA_TYPE_INT64_ARRAY: {
+			int64_t *val;
+			uint_t i, nelem;
+
+			(void) nvpair_value_int64_array(nvp, &val, &nelem);
+			for (i = 0; i < nelem; i++)
+				printf(gettext("0x%llx "),
+				    (u_longlong_t)val[i]);
+
+			break;
+			}
+
+		case DATA_TYPE_UINT64_ARRAY: {
+			uint64_t *val;
+			uint_t i, nelem;
+
+			(void) nvpair_value_uint64_array(nvp, &val, &nelem);
+			for (i = 0; i < nelem; i++)
+				printf(gettext("0x%llx "),
+				    (u_longlong_t)val[i]);
+
+			break;
+			}
+
+		case DATA_TYPE_STRING_ARRAY: {
+			char **str;
+			uint_t i, nelem;
+
+			(void) nvpair_value_string_array(nvp, &str, &nelem);
+			for (i = 0; i < nelem; i++)
+				printf(gettext("\"%s\" "),
+				    str[i] ? str[i] : "<NULL>");
+
+			break;
+			}
+
+		case DATA_TYPE_BOOLEAN_ARRAY:
+		case DATA_TYPE_BYTE_ARRAY:
+		case DATA_TYPE_DOUBLE:
+		case DATA_TYPE_DONTCARE:
+		case DATA_TYPE_UNKNOWN:
+			printf(gettext("<unknown>"));
+			break;
+		}
+
+		printf(gettext("\n"));
+	}
+}
+
+static int
+zpool_do_events_next(ev_opts_t *opts)
+{
+	nvlist_t *nvl;
+	int zevent_fd, ret, dropped;
+	char *pool;
+
+	zevent_fd = open(ZFS_DEV, O_RDWR);
+	VERIFY(zevent_fd >= 0);
+
+	if (!opts->scripted)
+		(void) printf(gettext("%-30s %s\n"), "TIME", "CLASS");
+
+	while (1) {
+		ret = zpool_events_next(g_zfs, &nvl, &dropped,
+		    (opts->follow ? ZEVENT_NONE : ZEVENT_NONBLOCK), zevent_fd);
+		if (ret || nvl == NULL)
+			break;
+
+		if (dropped > 0)
+			(void) printf(gettext("dropped %d events\n"), dropped);
+
+		if (strlen(opts->poolname) > 0 &&
+		    nvlist_lookup_string(nvl, FM_FMRI_ZFS_POOL, &pool) == 0 &&
+		    strcmp(opts->poolname, pool) != 0)
+			continue;
+
+		zpool_do_events_short(nvl, opts);
+
+		if (opts->verbose) {
+			zpool_do_events_nvprint(nvl, 8);
+			printf(gettext("\n"));
+		}
+		(void) fflush(stdout);
+
+		nvlist_free(nvl);
+	}
+
+	VERIFY(0 == close(zevent_fd));
+
+	return (ret);
+}
+
+static int
+zpool_do_events_clear(ev_opts_t *opts)
+{
+	int count, ret;
+
+	ret = zpool_events_clear(g_zfs, &count);
+	if (!ret)
+		(void) printf(gettext("cleared %d events\n"), count);
+
+	return (ret);
+}
+
+/*
+ * zpool events [-vHf [pool] | -c]
+ *
+ * Displays events logs by ZFS.
+ */
+int
+zpool_do_events(int argc, char **argv)
+{
+	ev_opts_t opts = { 0 };
+	int ret;
+	int c;
+
+	/* check options */
+	while ((c = getopt(argc, argv, "vHfc")) != -1) {
+		switch (c) {
+		case 'v':
+			opts.verbose = 1;
+			break;
+		case 'H':
+			opts.scripted = 1;
+			break;
+		case 'f':
+			opts.follow = 1;
+			break;
+		case 'c':
+			opts.clear = 1;
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc > 1) {
+		(void) fprintf(stderr, gettext("too many arguments\n"));
+		usage(B_FALSE);
+	} else if (argc == 1) {
+		(void) strlcpy(opts.poolname, argv[0], sizeof (opts.poolname));
+		if (!zfs_name_valid(opts.poolname, ZFS_TYPE_POOL)) {
+			(void) fprintf(stderr,
+			    gettext("invalid pool name '%s'\n"), opts.poolname);
+			usage(B_FALSE);
+		}
+	}
+
+	if ((argc == 1 || opts.verbose || opts.scripted || opts.follow) &&
+	    opts.clear) {
+		(void) fprintf(stderr,
+		    gettext("invalid options combined with -c\n"));
+		usage(B_FALSE);
+	}
+
+	if (opts.clear)
+		ret = zpool_do_events_clear(&opts);
+	else
+		ret = zpool_do_events_next(&opts);
+
+	return (ret);
+}
+
+static int
+get_callback(zpool_handle_t *zhp, void *data)
+{
+	zprop_get_cbdata_t *cbp = (zprop_get_cbdata_t *)data;
+	char value[MAXNAMELEN];
+	zprop_source_t srctype;
+	zprop_list_t *pl;
+
+	for (pl = cbp->cb_proplist; pl != NULL; pl = pl->pl_next) {
+
+		/*
+		 * Skip the special fake placeholder. This will also skip
+		 * over the name property when 'all' is specified.
+		 */
+		if (pl->pl_prop == ZPOOL_PROP_NAME &&
+		    pl == cbp->cb_proplist)
+			continue;
+
+		if (pl->pl_prop == ZPROP_INVAL &&
+		    (zpool_prop_feature(pl->pl_user_prop) ||
+		    zpool_prop_unsupported(pl->pl_user_prop))) {
+			srctype = ZPROP_SRC_LOCAL;
+
+			if (zpool_prop_get_feature(zhp, pl->pl_user_prop,
+			    value, sizeof (value)) == 0) {
+				zprop_print_one_property(zpool_get_name(zhp),
+				    cbp, pl->pl_user_prop, value, srctype,
+				    NULL, NULL);
+			}
+		} else {
+			if (zpool_get_prop(zhp, pl->pl_prop, value,
+			    sizeof (value), &srctype, cbp->cb_literal) != 0)
+				continue;
+
+			zprop_print_one_property(zpool_get_name(zhp), cbp,
+			    zpool_prop_to_name(pl->pl_prop), value, srctype,
+			    NULL, NULL);
+		}
+	}
+	return (0);
+}
+
+/*
+ * zpool get [-Hp] [-o "all" | field[,...]] <"all" | property[,...]> <pool> ...
+ *
+ *	-H	Scripted mode.  Don't display headers, and separate properties
+ *		by a single tab.
+ *	-o	List of columns to display.  Defaults to
+ *		"name,property,value,source".
+ * 	-p	Display values in parsable (exact) format.
+ *
+ * Get properties of pools in the system. Output space statistics
+ * for each one as well as other attributes.
+ */
+int
+zpool_do_get(int argc, char **argv)
+{
+	zprop_get_cbdata_t cb = { 0 };
+	zprop_list_t fake_name = { 0 };
+	int ret;
+	int c, i;
+	char *value;
+
+	cb.cb_first = B_TRUE;
+
+	/*
+	 * Set up default columns and sources.
+	 */
+	cb.cb_sources = ZPROP_SRC_ALL;
+	cb.cb_columns[0] = GET_COL_NAME;
+	cb.cb_columns[1] = GET_COL_PROPERTY;
+	cb.cb_columns[2] = GET_COL_VALUE;
+	cb.cb_columns[3] = GET_COL_SOURCE;
+	cb.cb_type = ZFS_TYPE_POOL;
+
+	/* check options */
+	while ((c = getopt(argc, argv, ":Hpo:")) != -1) {
+		switch (c) {
+		case 'p':
+			cb.cb_literal = B_TRUE;
+			break;
+		case 'H':
+			cb.cb_scripted = B_TRUE;
+			break;
+		case 'o':
+			bzero(&cb.cb_columns, sizeof (cb.cb_columns));
+			i = 0;
+			while (*optarg != '\0') {
+				static char *col_subopts[] =
+				{ "name", "property", "value", "source",
+				"all", NULL };
+
+				if (i == ZFS_GET_NCOLS) {
+					(void) fprintf(stderr, gettext("too "
+					"many fields given to -o "
+					"option\n"));
+					usage(B_FALSE);
+				}
+
+				switch (getsubopt(&optarg, col_subopts,
+				    &value)) {
+				case 0:
+					cb.cb_columns[i++] = GET_COL_NAME;
+					break;
+				case 1:
+					cb.cb_columns[i++] = GET_COL_PROPERTY;
+					break;
+				case 2:
+					cb.cb_columns[i++] = GET_COL_VALUE;
+					break;
+				case 3:
+					cb.cb_columns[i++] = GET_COL_SOURCE;
+					break;
+				case 4:
+					if (i > 0) {
+						(void) fprintf(stderr,
+						    gettext("\"all\" conflicts "
+						    "with specific fields "
+						    "given to -o option\n"));
+						usage(B_FALSE);
+					}
+					cb.cb_columns[0] = GET_COL_NAME;
+					cb.cb_columns[1] = GET_COL_PROPERTY;
+					cb.cb_columns[2] = GET_COL_VALUE;
+					cb.cb_columns[3] = GET_COL_SOURCE;
+					i = ZFS_GET_NCOLS;
+					break;
+				default:
+					(void) fprintf(stderr,
+					    gettext("invalid column name "
+					    "'%s'\n"), value);
+					usage(B_FALSE);
+				}
+			}
+			break;
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing property "
+		    "argument\n"));
+		usage(B_FALSE);
+	}
+
+	if (zprop_get_list(g_zfs, argv[0], &cb.cb_proplist,
+	    ZFS_TYPE_POOL) != 0)
+		usage(B_FALSE);
+
+	argc--;
+	argv++;
+
+	if (cb.cb_proplist != NULL) {
+		fake_name.pl_prop = ZPOOL_PROP_NAME;
+		fake_name.pl_width = strlen(gettext("NAME"));
+		fake_name.pl_next = cb.cb_proplist;
+		cb.cb_proplist = &fake_name;
+	}
+
+	ret = for_each_pool(argc, argv, B_TRUE, &cb.cb_proplist,
+	    get_callback, &cb);
+
+	if (cb.cb_proplist == &fake_name)
+		zprop_free_list(fake_name.pl_next);
+	else
+		zprop_free_list(cb.cb_proplist);
+
+	return (ret);
+}
+
+typedef struct set_cbdata {
+	char *cb_propname;
+	char *cb_value;
+	boolean_t cb_any_successful;
+} set_cbdata_t;
+
+static int
+set_callback(zpool_handle_t *zhp, void *data)
+{
+	int error;
+	set_cbdata_t *cb = (set_cbdata_t *)data;
+
+	error = zpool_set_prop(zhp, cb->cb_propname, cb->cb_value);
+
+	if (!error)
+		cb->cb_any_successful = B_TRUE;
+
+	return (error);
+}
+
+int
+zpool_do_set(int argc, char **argv)
+{
+	set_cbdata_t cb = { 0 };
+	int error;
+
+	if (argc > 1 && argv[1][0] == '-') {
+		(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+		    argv[1][1]);
+		usage(B_FALSE);
+	}
+
+	if (argc < 2) {
+		(void) fprintf(stderr, gettext("missing property=value "
+		    "argument\n"));
+		usage(B_FALSE);
+	}
+
+	if (argc < 3) {
+		(void) fprintf(stderr, gettext("missing pool name\n"));
+		usage(B_FALSE);
+	}
+
+	if (argc > 3) {
+		(void) fprintf(stderr, gettext("too many pool names\n"));
+		usage(B_FALSE);
+	}
+
+	cb.cb_propname = argv[1];
+	cb.cb_value = strchr(cb.cb_propname, '=');
+	if (cb.cb_value == NULL) {
+		(void) fprintf(stderr, gettext("missing value in "
+		    "property=value argument\n"));
+		usage(B_FALSE);
+	}
+
+	*(cb.cb_value) = '\0';
+	cb.cb_value++;
+
+	error = for_each_pool(argc - 2, argv + 2, B_TRUE, NULL,
+	    set_callback, &cb);
+
+	return (error);
+}
+
+/* Add up the total number of bytes left to initialize/trim across all vdevs */
+static uint64_t
+vdev_activity_remaining(nvlist_t *nv, zpool_wait_activity_t activity)
+{
+	uint64_t bytes_remaining;
+	nvlist_t **child;
+	uint_t c, children;
+	vdev_stat_t *vs;
+
+	assert(activity == ZPOOL_WAIT_INITIALIZE ||
+	    activity == ZPOOL_WAIT_TRIM);
+
+	verify(nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS,
+	    (uint64_t **)&vs, &c) == 0);
+
+	if (activity == ZPOOL_WAIT_INITIALIZE &&
+	    vs->vs_initialize_state == VDEV_INITIALIZE_ACTIVE)
+		bytes_remaining = vs->vs_initialize_bytes_est -
+		    vs->vs_initialize_bytes_done;
+	else if (activity == ZPOOL_WAIT_TRIM &&
+	    vs->vs_trim_state == VDEV_TRIM_ACTIVE)
+		bytes_remaining = vs->vs_trim_bytes_est -
+		    vs->vs_trim_bytes_done;
+	else
+		bytes_remaining = 0;
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0)
+		children = 0;
+
+	for (c = 0; c < children; c++)
+		bytes_remaining += vdev_activity_remaining(child[c], activity);
+
+	return (bytes_remaining);
+}
+
+/* Add up the total number of bytes left to rebuild across top-level vdevs */
+static uint64_t
+vdev_activity_top_remaining(nvlist_t *nv)
+{
+	uint64_t bytes_remaining = 0;
+	nvlist_t **child;
+	uint_t children;
+	int error;
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0)
+		children = 0;
+
+	for (uint_t c = 0; c < children; c++) {
+		vdev_rebuild_stat_t *vrs;
+		uint_t i;
+
+		error = nvlist_lookup_uint64_array(child[c],
+		    ZPOOL_CONFIG_REBUILD_STATS, (uint64_t **)&vrs, &i);
+		if (error == 0) {
+			if (vrs->vrs_state == VDEV_REBUILD_ACTIVE) {
+				bytes_remaining += (vrs->vrs_bytes_est -
+				    vrs->vrs_bytes_rebuilt);
+			}
+		}
+	}
+
+	return (bytes_remaining);
+}
+
+/* Whether any vdevs are 'spare' or 'replacing' vdevs */
+static boolean_t
+vdev_any_spare_replacing(nvlist_t *nv)
+{
+	nvlist_t **child;
+	uint_t c, children;
+	char *vdev_type;
+
+	(void) nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &vdev_type);
+
+	if (strcmp(vdev_type, VDEV_TYPE_REPLACING) == 0 ||
+	    strcmp(vdev_type, VDEV_TYPE_SPARE) == 0) {
+		return (B_TRUE);
+	}
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0)
+		children = 0;
+
+	for (c = 0; c < children; c++) {
+		if (vdev_any_spare_replacing(child[c]))
+			return (B_TRUE);
+	}
+
+	return (B_FALSE);
+}
+
+typedef struct wait_data {
+	char *wd_poolname;
+	boolean_t wd_scripted;
+	boolean_t wd_exact;
+	boolean_t wd_headers_once;
+	boolean_t wd_should_exit;
+	/* Which activities to wait for */
+	boolean_t wd_enabled[ZPOOL_WAIT_NUM_ACTIVITIES];
+	float wd_interval;
+	pthread_cond_t wd_cv;
+	pthread_mutex_t wd_mutex;
+} wait_data_t;
+
+/*
+ * Print to stdout a single line, containing one column for each activity that
+ * we are waiting for specifying how many bytes of work are left for that
+ * activity.
+ */
+static void
+print_wait_status_row(wait_data_t *wd, zpool_handle_t *zhp, int row)
+{
+	nvlist_t *config, *nvroot;
+	uint_t c;
+	int i;
+	pool_checkpoint_stat_t *pcs = NULL;
+	pool_scan_stat_t *pss = NULL;
+	pool_removal_stat_t *prs = NULL;
+	char *headers[] = {"DISCARD", "FREE", "INITIALIZE", "REPLACE",
+	    "REMOVE", "RESILVER", "SCRUB", "TRIM"};
+	int col_widths[ZPOOL_WAIT_NUM_ACTIVITIES];
+
+	/* Calculate the width of each column */
+	for (i = 0; i < ZPOOL_WAIT_NUM_ACTIVITIES; i++) {
+		/*
+		 * Make sure we have enough space in the col for pretty-printed
+		 * numbers and for the column header, and then leave a couple
+		 * spaces between cols for readability.
+		 */
+		col_widths[i] = MAX(strlen(headers[i]), 6) + 2;
+	}
+
+	/* Print header if appropriate */
+	int term_height = terminal_height();
+	boolean_t reprint_header = (!wd->wd_headers_once && term_height > 0 &&
+	    row % (term_height-1) == 0);
+	if (!wd->wd_scripted && (row == 0 || reprint_header)) {
+		for (i = 0; i < ZPOOL_WAIT_NUM_ACTIVITIES; i++) {
+			if (wd->wd_enabled[i])
+				(void) printf("%*s", col_widths[i], headers[i]);
+		}
+		(void) printf("\n");
+	}
+
+	/* Bytes of work remaining in each activity */
+	int64_t bytes_rem[ZPOOL_WAIT_NUM_ACTIVITIES] = {0};
+
+	bytes_rem[ZPOOL_WAIT_FREE] =
+	    zpool_get_prop_int(zhp, ZPOOL_PROP_FREEING, NULL);
+
+	config = zpool_get_config(zhp, NULL);
+	nvroot = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE);
+
+	(void) nvlist_lookup_uint64_array(nvroot,
+	    ZPOOL_CONFIG_CHECKPOINT_STATS, (uint64_t **)&pcs, &c);
+	if (pcs != NULL && pcs->pcs_state == CS_CHECKPOINT_DISCARDING)
+		bytes_rem[ZPOOL_WAIT_CKPT_DISCARD] = pcs->pcs_space;
+
+	(void) nvlist_lookup_uint64_array(nvroot,
+	    ZPOOL_CONFIG_REMOVAL_STATS, (uint64_t **)&prs, &c);
+	if (prs != NULL && prs->prs_state == DSS_SCANNING)
+		bytes_rem[ZPOOL_WAIT_REMOVE] = prs->prs_to_copy -
+		    prs->prs_copied;
+
+	(void) nvlist_lookup_uint64_array(nvroot,
+	    ZPOOL_CONFIG_SCAN_STATS, (uint64_t **)&pss, &c);
+	if (pss != NULL && pss->pss_state == DSS_SCANNING &&
+	    pss->pss_pass_scrub_pause == 0) {
+		int64_t rem = pss->pss_to_examine - pss->pss_issued;
+		if (pss->pss_func == POOL_SCAN_SCRUB)
+			bytes_rem[ZPOOL_WAIT_SCRUB] = rem;
+		else
+			bytes_rem[ZPOOL_WAIT_RESILVER] = rem;
+	} else if (check_rebuilding(nvroot, NULL)) {
+		bytes_rem[ZPOOL_WAIT_RESILVER] =
+		    vdev_activity_top_remaining(nvroot);
+	}
+
+	bytes_rem[ZPOOL_WAIT_INITIALIZE] =
+	    vdev_activity_remaining(nvroot, ZPOOL_WAIT_INITIALIZE);
+	bytes_rem[ZPOOL_WAIT_TRIM] =
+	    vdev_activity_remaining(nvroot, ZPOOL_WAIT_TRIM);
+
+	/*
+	 * A replace finishes after resilvering finishes, so the amount of work
+	 * left for a replace is the same as for resilvering.
+	 *
+	 * It isn't quite correct to say that if we have any 'spare' or
+	 * 'replacing' vdevs and a resilver is happening, then a replace is in
+	 * progress, like we do here. When a hot spare is used, the faulted vdev
+	 * is not removed after the hot spare is resilvered, so parent 'spare'
+	 * vdev is not removed either. So we could have a 'spare' vdev, but be
+	 * resilvering for a different reason. However, we use it as a heuristic
+	 * because we don't have access to the DTLs, which could tell us whether
+	 * or not we have really finished resilvering a hot spare.
+	 */
+	if (vdev_any_spare_replacing(nvroot))
+		bytes_rem[ZPOOL_WAIT_REPLACE] =  bytes_rem[ZPOOL_WAIT_RESILVER];
+
+	if (timestamp_fmt != NODATE)
+		print_timestamp(timestamp_fmt);
+
+	for (i = 0; i < ZPOOL_WAIT_NUM_ACTIVITIES; i++) {
+		char buf[64];
+		if (!wd->wd_enabled[i])
+			continue;
+
+		if (wd->wd_exact)
+			(void) snprintf(buf, sizeof (buf), "%" PRIi64,
+			    bytes_rem[i]);
+		else
+			zfs_nicenum(bytes_rem[i], buf, sizeof (buf));
+
+		if (wd->wd_scripted)
+			(void) printf(i == 0 ? "%s" : "\t%s", buf);
+		else
+			(void) printf(" %*s", col_widths[i] - 1, buf);
+	}
+	(void) printf("\n");
+	(void) fflush(stdout);
+}
+
+static void *
+wait_status_thread(void *arg)
+{
+	wait_data_t *wd = (wait_data_t *)arg;
+	zpool_handle_t *zhp;
+
+	if ((zhp = zpool_open(g_zfs, wd->wd_poolname)) == NULL)
+		return (void *)(1);
+
+	for (int row = 0; ; row++) {
+		boolean_t missing;
+		struct timespec timeout;
+		int ret = 0;
+		(void) clock_gettime(CLOCK_REALTIME, &timeout);
+
+		if (zpool_refresh_stats(zhp, &missing) != 0 || missing ||
+		    zpool_props_refresh(zhp) != 0) {
+			zpool_close(zhp);
+			return (void *)(uintptr_t)(missing ? 0 : 1);
+		}
+
+		print_wait_status_row(wd, zhp, row);
+
+		timeout.tv_sec += floor(wd->wd_interval);
+		long nanos = timeout.tv_nsec +
+		    (wd->wd_interval - floor(wd->wd_interval)) * NANOSEC;
+		if (nanos >= NANOSEC) {
+			timeout.tv_sec++;
+			timeout.tv_nsec = nanos - NANOSEC;
+		} else {
+			timeout.tv_nsec = nanos;
+		}
+		pthread_mutex_lock(&wd->wd_mutex);
+		if (!wd->wd_should_exit)
+			ret = pthread_cond_timedwait(&wd->wd_cv, &wd->wd_mutex,
+			    &timeout);
+		pthread_mutex_unlock(&wd->wd_mutex);
+		if (ret == 0) {
+			break; /* signaled by main thread */
+		} else if (ret != ETIMEDOUT) {
+			(void) fprintf(stderr, gettext("pthread_cond_timedwait "
+			    "failed: %s\n"), strerror(ret));
+			zpool_close(zhp);
+			return (void *)(uintptr_t)(1);
+		}
+	}
+
+	zpool_close(zhp);
+	return (void *)(0);
+}
+
+int
+zpool_do_wait(int argc, char **argv)
+{
+	boolean_t verbose = B_FALSE;
+	char c;
+	char *value;
+	int i;
+	unsigned long count;
+	pthread_t status_thr;
+	int error = 0;
+	zpool_handle_t *zhp;
+
+	wait_data_t wd;
+	wd.wd_scripted = B_FALSE;
+	wd.wd_exact = B_FALSE;
+	wd.wd_headers_once = B_FALSE;
+	wd.wd_should_exit = B_FALSE;
+
+	pthread_mutex_init(&wd.wd_mutex, NULL);
+	pthread_cond_init(&wd.wd_cv, NULL);
+
+	/* By default, wait for all types of activity. */
+	for (i = 0; i < ZPOOL_WAIT_NUM_ACTIVITIES; i++)
+		wd.wd_enabled[i] = B_TRUE;
+
+	while ((c = getopt(argc, argv, "HpT:t:")) != -1) {
+		switch (c) {
+		case 'H':
+			wd.wd_scripted = B_TRUE;
+			break;
+		case 'n':
+			wd.wd_headers_once = B_TRUE;
+			break;
+		case 'p':
+			wd.wd_exact = B_TRUE;
+			break;
+		case 'T':
+			get_timestamp_arg(*optarg);
+			break;
+		case 't':
+		{
+			static char *col_subopts[] = { "discard", "free",
+			    "initialize", "replace", "remove", "resilver",
+			    "scrub", "trim", NULL };
+
+			/* Reset activities array */
+			bzero(&wd.wd_enabled, sizeof (wd.wd_enabled));
+			while (*optarg != '\0') {
+				int activity = getsubopt(&optarg, col_subopts,
+				    &value);
+
+				if (activity < 0) {
+					(void) fprintf(stderr,
+					    gettext("invalid activity '%s'\n"),
+					    value);
+					usage(B_FALSE);
+				}
+
+				wd.wd_enabled[activity] = B_TRUE;
+			}
+			break;
+		}
+		case '?':
+			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
+			    optopt);
+			usage(B_FALSE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	get_interval_count(&argc, argv, &wd.wd_interval, &count);
+	if (count != 0) {
+		/* This subcmd only accepts an interval, not a count */
+		(void) fprintf(stderr, gettext("too many arguments\n"));
+		usage(B_FALSE);
+	}
+
+	if (wd.wd_interval != 0)
+		verbose = B_TRUE;
+
+	if (argc < 1) {
+		(void) fprintf(stderr, gettext("missing 'pool' argument\n"));
+		usage(B_FALSE);
+	}
+	if (argc > 1) {
+		(void) fprintf(stderr, gettext("too many arguments\n"));
+		usage(B_FALSE);
+	}
+
+	wd.wd_poolname = argv[0];
+
+	if ((zhp = zpool_open(g_zfs, wd.wd_poolname)) == NULL)
+		return (1);
+
+	if (verbose) {
+		/*
+		 * We use a separate thread for printing status updates because
+		 * the main thread will call lzc_wait(), which blocks as long
+		 * as an activity is in progress, which can be a long time.
+		 */
+		if (pthread_create(&status_thr, NULL, wait_status_thread, &wd)
+		    != 0) {
+			(void) fprintf(stderr, gettext("failed to create status"
+			    "thread: %s\n"), strerror(errno));
+			zpool_close(zhp);
+			return (1);
+		}
+	}
+
+	/*
+	 * Loop over all activities that we are supposed to wait for until none
+	 * of them are in progress. Note that this means we can end up waiting
+	 * for more activities to complete than just those that were in progress
+	 * when we began waiting; if an activity we are interested in begins
+	 * while we are waiting for another activity, we will wait for both to
+	 * complete before exiting.
+	 */
+	for (;;) {
+		boolean_t missing = B_FALSE;
+		boolean_t any_waited = B_FALSE;
+
+		for (i = 0; i < ZPOOL_WAIT_NUM_ACTIVITIES; i++) {
+			boolean_t waited;
+
+			if (!wd.wd_enabled[i])
+				continue;
+
+			error = zpool_wait_status(zhp, i, &missing, &waited);
+			if (error != 0 || missing)
+				break;
+
+			any_waited = (any_waited || waited);
+		}
+
+		if (error != 0 || missing || !any_waited)
+			break;
+	}
+
+	zpool_close(zhp);
+
+	if (verbose) {
+		uintptr_t status;
+		pthread_mutex_lock(&wd.wd_mutex);
+		wd.wd_should_exit = B_TRUE;
+		pthread_cond_signal(&wd.wd_cv);
+		pthread_mutex_unlock(&wd.wd_mutex);
+		(void) pthread_join(status_thr, (void *)&status);
+		if (status != 0)
+			error = status;
+	}
+
+	pthread_mutex_destroy(&wd.wd_mutex);
+	pthread_cond_destroy(&wd.wd_cv);
+	return (error);
+}
+
+static int
+find_command_idx(char *command, int *idx)
+{
+	int i;
+
+	for (i = 0; i < NCOMMAND; i++) {
+		if (command_table[i].name == NULL)
+			continue;
+
+		if (strcmp(command, command_table[i].name) == 0) {
+			*idx = i;
+			return (0);
+		}
+	}
+	return (1);
+}
+
+/*
+ * Display version message
+ */
+static int
+zpool_do_version(int argc, char **argv)
+{
+	if (zfs_version_print() == -1)
+		return (1);
+
+	return (0);
+}
+
+int
+main(int argc, char **argv)
+{
+	int ret = 0;
+	int i = 0;
+	char *cmdname;
+	char **newargv;
+
+	(void) setlocale(LC_ALL, "");
+	(void) textdomain(TEXT_DOMAIN);
+	srand(time(NULL));
+
+	opterr = 0;
+
+	/*
+	 * Make sure the user has specified some command.
+	 */
+	if (argc < 2) {
+		(void) fprintf(stderr, gettext("missing command\n"));
+		usage(B_FALSE);
+	}
+
+	cmdname = argv[1];
+
+	/*
+	 * Special case '-?'
+	 */
+	if ((strcmp(cmdname, "-?") == 0) || strcmp(cmdname, "--help") == 0)
+		usage(B_TRUE);
+
+	/*
+	 * Special case '-V|--version'
+	 */
+	if ((strcmp(cmdname, "-V") == 0) || (strcmp(cmdname, "--version") == 0))
+		return (zpool_do_version(argc, argv));
+
+	if ((g_zfs = libzfs_init()) == NULL) {
+		(void) fprintf(stderr, "%s\n", libzfs_error_init(errno));
+		return (1);
+	}
+
+	libzfs_print_on_error(g_zfs, B_TRUE);
+
+	zfs_save_arguments(argc, argv, history_str, sizeof (history_str));
+
+	/*
+	 * Many commands modify input strings for string parsing reasons.
+	 * We create a copy to protect the original argv.
+	 */
+	newargv = malloc((argc + 1) * sizeof (newargv[0]));
+	for (i = 0; i < argc; i++)
+		newargv[i] = strdup(argv[i]);
+	newargv[argc] = NULL;
+
+	/*
+	 * Run the appropriate command.
+	 */
+	if (find_command_idx(cmdname, &i) == 0) {
+		current_command = &command_table[i];
+		ret = command_table[i].func(argc - 1, newargv + 1);
+	} else if (strchr(cmdname, '=')) {
+		verify(find_command_idx("set", &i) == 0);
+		current_command = &command_table[i];
+		ret = command_table[i].func(argc, newargv);
+	} else if (strcmp(cmdname, "freeze") == 0 && argc == 3) {
+		/*
+		 * 'freeze' is a vile debugging abomination, so we treat
+		 * it as such.
+		 */
+		zfs_cmd_t zc = {"\0"};
+
+		(void) strlcpy(zc.zc_name, argv[2], sizeof (zc.zc_name));
+		ret = zfs_ioctl(g_zfs, ZFS_IOC_POOL_FREEZE, &zc);
+		if (ret != 0) {
+			(void) fprintf(stderr,
+			gettext("failed to freeze pool: %d\n"), errno);
+			ret = 1;
+		}
+
+		log_history = 0;
+	} else {
+		(void) fprintf(stderr, gettext("unrecognized "
+		    "command '%s'\n"), cmdname);
+		usage(B_FALSE);
+		ret = 1;
+	}
+
+	for (i = 0; i < argc; i++)
+		free(newargv[i]);
+	free(newargv);
+
+	if (ret == 0 && log_history)
+		(void) zpool_log_history(g_zfs, history_str);
+
+	libzfs_fini(g_zfs);
+
+	/*
+	 * The 'ZFS_ABORT' environment variable causes us to dump core on exit
+	 * for the purposes of running ::findleaks.
+	 */
+	if (getenv("ZFS_ABORT") != NULL) {
+		(void) printf("dumping core by request\n");
+		abort();
+	}
+
+	return (ret);
+}
diff --git a/cmd/zpool/zpool_util.c b/cmd/zpool/zpool_util.c
new file mode 100644
index 000000000000..1c1eb024f365
--- /dev/null
+++ b/cmd/zpool/zpool_util.c
@@ -0,0 +1,125 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <errno.h>
+#include <libgen.h>
+#include <libintl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <ctype.h>
+
+#include "zpool_util.h"
+
+/*
+ * Utility function to guarantee malloc() success.
+ */
+void *
+safe_malloc(size_t size)
+{
+	void *data;
+
+	if ((data = calloc(1, size)) == NULL) {
+		(void) fprintf(stderr, "internal error: out of memory\n");
+		exit(1);
+	}
+
+	return (data);
+}
+
+/*
+ * Display an out of memory error message and abort the current program.
+ */
+void
+zpool_no_memory(void)
+{
+	assert(errno == ENOMEM);
+	(void) fprintf(stderr,
+	    gettext("internal error: out of memory\n"));
+	exit(1);
+}
+
+/*
+ * Return the number of logs in supplied nvlist
+ */
+uint_t
+num_logs(nvlist_t *nv)
+{
+	uint_t nlogs = 0;
+	uint_t c, children;
+	nvlist_t **child;
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0)
+		return (0);
+
+	for (c = 0; c < children; c++) {
+		uint64_t is_log = B_FALSE;
+
+		(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
+		    &is_log);
+		if (is_log)
+			nlogs++;
+	}
+	return (nlogs);
+}
+
+/* Find the max element in an array of uint64_t values */
+uint64_t
+array64_max(uint64_t array[], unsigned int len)
+{
+	uint64_t max = 0;
+	int i;
+	for (i = 0; i < len; i++)
+		max = MAX(max, array[i]);
+
+	return (max);
+}
+
+/*
+ * Find highest one bit set.
+ * Returns bit number + 1 of highest bit that is set, otherwise returns 0.
+ */
+int
+highbit64(uint64_t i)
+{
+	if (i == 0)
+		return (0);
+
+	return (NBBY * sizeof (uint64_t) - __builtin_clzll(i));
+}
+
+/*
+ * Find lowest one bit set.
+ * Returns bit number + 1 of lowest bit that is set, otherwise returns 0.
+ */
+int
+lowbit64(uint64_t i)
+{
+	if (i == 0)
+		return (0);
+
+	return (__builtin_ffsll(i));
+}
diff --git a/cmd/zpool/zpool_util.h b/cmd/zpool/zpool_util.h
new file mode 100644
index 000000000000..265aa58953a0
--- /dev/null
+++ b/cmd/zpool/zpool_util.h
@@ -0,0 +1,137 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	ZPOOL_UTIL_H
+#define	ZPOOL_UTIL_H
+
+#include <libnvpair.h>
+#include <libzfs.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/* Path to scripts you can run with "zpool status/iostat -c" */
+#define	ZPOOL_SCRIPTS_DIR SYSCONFDIR"/zfs/zpool.d"
+
+/*
+ * Basic utility functions
+ */
+void *safe_malloc(size_t);
+void zpool_no_memory(void);
+uint_t num_logs(nvlist_t *nv);
+uint64_t array64_max(uint64_t array[], unsigned int len);
+int highbit64(uint64_t i);
+int lowbit64(uint64_t i);
+
+/*
+ * Misc utility functions
+ */
+char *zpool_get_cmd_search_path(void);
+
+/*
+ * Virtual device functions
+ */
+
+nvlist_t *make_root_vdev(zpool_handle_t *zhp, nvlist_t *props, int force,
+    int check_rep, boolean_t replacing, boolean_t dryrun, int argc,
+    char **argv);
+nvlist_t *split_mirror_vdev(zpool_handle_t *zhp, char *newname,
+    nvlist_t *props, splitflags_t flags, int argc, char **argv);
+
+/*
+ * Pool list functions
+ */
+int for_each_pool(int, char **, boolean_t unavail, zprop_list_t **,
+    zpool_iter_f, void *);
+
+/* Vdev list functions */
+typedef int (*pool_vdev_iter_f)(zpool_handle_t *, nvlist_t *, void *);
+int for_each_vdev(zpool_handle_t *zhp, pool_vdev_iter_f func, void *data);
+
+typedef struct zpool_list zpool_list_t;
+
+zpool_list_t *pool_list_get(int, char **, zprop_list_t **, int *);
+void pool_list_update(zpool_list_t *);
+int pool_list_iter(zpool_list_t *, int unavail, zpool_iter_f, void *);
+void pool_list_free(zpool_list_t *);
+int pool_list_count(zpool_list_t *);
+void pool_list_remove(zpool_list_t *, zpool_handle_t *);
+
+extern libzfs_handle_t *g_zfs;
+
+
+typedef	struct vdev_cmd_data
+{
+	char **lines;	/* Array of lines of output, minus the column name */
+	int lines_cnt;	/* Number of lines in the array */
+
+	char **cols;	/* Array of column names */
+	int cols_cnt;	/* Number of column names */
+
+
+	char *path;	/* vdev path */
+	char *upath;	/* vdev underlying path */
+	char *pool;	/* Pool name */
+	char *cmd;	/* backpointer to cmd */
+	char *vdev_enc_sysfs_path;	/* enclosure sysfs path (if any) */
+} vdev_cmd_data_t;
+
+typedef struct vdev_cmd_data_list
+{
+	char *cmd;		/* Command to run */
+	unsigned int count;	/* Number of vdev_cmd_data items (vdevs) */
+
+	/* fields used to select only certain vdevs, if requested */
+	libzfs_handle_t *g_zfs;
+	char **vdev_names;
+	int vdev_names_count;
+	int cb_name_flags;
+
+	vdev_cmd_data_t *data;	/* Array of vdevs */
+
+	/* List of unique column names and widths */
+	char **uniq_cols;
+	int uniq_cols_cnt;
+	int *uniq_cols_width;
+
+} vdev_cmd_data_list_t;
+
+vdev_cmd_data_list_t *all_pools_for_each_vdev_run(int argc, char **argv,
+    char *cmd, libzfs_handle_t *g_zfs, char **vdev_names, int vdev_names_count,
+    int cb_name_flags);
+
+void free_vdev_cmd_data_list(vdev_cmd_data_list_t *vcdl);
+
+int check_device(const char *path, boolean_t force,
+    boolean_t isspare, boolean_t iswholedisk);
+boolean_t check_sector_size_database(char *path, int *sector_size);
+void vdev_error(const char *fmt, ...);
+int check_file(const char *file, boolean_t force, boolean_t isspare);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* ZPOOL_UTIL_H */
diff --git a/cmd/zpool/zpool_vdev.c b/cmd/zpool/zpool_vdev.c
new file mode 100644
index 000000000000..9aa09b18c4ae
--- /dev/null
+++ b/cmd/zpool/zpool_vdev.c
@@ -0,0 +1,1581 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2018 by Delphix. All rights reserved.
+ * Copyright (c) 2016, 2017 Intel Corporation.
+ * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>.
+ */
+
+/*
+ * Functions to convert between a list of vdevs and an nvlist representing the
+ * configuration.  Each entry in the list can be one of:
+ *
+ * 	Device vdevs
+ * 		disk=(path=..., devid=...)
+ * 		file=(path=...)
+ *
+ * 	Group vdevs
+ * 		raidz[1|2]=(...)
+ * 		mirror=(...)
+ *
+ * 	Hot spares
+ *
+ * While the underlying implementation supports it, group vdevs cannot contain
+ * other group vdevs.  All userland verification of devices is contained within
+ * this file.  If successful, the nvlist returned can be passed directly to the
+ * kernel; we've done as much verification as possible in userland.
+ *
+ * Hot spares are a special case, and passed down as an array of disk vdevs, at
+ * the same level as the root of the vdev tree.
+ *
+ * The only function exported by this file is 'make_root_vdev'.  The
+ * function performs several passes:
+ *
+ * 	1. Construct the vdev specification.  Performs syntax validation and
+ *         makes sure each device is valid.
+ * 	2. Check for devices in use.  Using libblkid to make sure that no
+ *         devices are also in use.  Some can be overridden using the 'force'
+ *         flag, others cannot.
+ * 	3. Check for replication errors if the 'force' flag is not specified.
+ *         validates that the replication level is consistent across the
+ *         entire pool.
+ * 	4. Call libzfs to label any whole disks with an EFI label.
+ */
+
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <libintl.h>
+#include <libnvpair.h>
+#include <libzutil.h>
+#include <limits.h>
+#include <sys/spa.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include "zpool_util.h"
+#include <sys/zfs_context.h>
+#include <sys/stat.h>
+
+/*
+ * For any given vdev specification, we can have multiple errors.  The
+ * vdev_error() function keeps track of whether we have seen an error yet, and
+ * prints out a header if its the first error we've seen.
+ */
+boolean_t error_seen;
+boolean_t is_force;
+
+
+
+
+/*PRINTFLIKE1*/
+void
+vdev_error(const char *fmt, ...)
+{
+	va_list ap;
+
+	if (!error_seen) {
+		(void) fprintf(stderr, gettext("invalid vdev specification\n"));
+		if (!is_force)
+			(void) fprintf(stderr, gettext("use '-f' to override "
+			    "the following errors:\n"));
+		else
+			(void) fprintf(stderr, gettext("the following errors "
+			    "must be manually repaired:\n"));
+		error_seen = B_TRUE;
+	}
+
+	va_start(ap, fmt);
+	(void) vfprintf(stderr, fmt, ap);
+	va_end(ap);
+}
+
+/*
+ * Check that a file is valid.  All we can do in this case is check that it's
+ * not in use by another pool, and not in use by swap.
+ */
+int
+check_file(const char *file, boolean_t force, boolean_t isspare)
+{
+	char  *name;
+	int fd;
+	int ret = 0;
+	pool_state_t state;
+	boolean_t inuse;
+
+	if ((fd = open(file, O_RDONLY)) < 0)
+		return (0);
+
+	if (zpool_in_use(g_zfs, fd, &state, &name, &inuse) == 0 && inuse) {
+		const char *desc;
+
+		switch (state) {
+		case POOL_STATE_ACTIVE:
+			desc = gettext("active");
+			break;
+
+		case POOL_STATE_EXPORTED:
+			desc = gettext("exported");
+			break;
+
+		case POOL_STATE_POTENTIALLY_ACTIVE:
+			desc = gettext("potentially active");
+			break;
+
+		default:
+			desc = gettext("unknown");
+			break;
+		}
+
+		/*
+		 * Allow hot spares to be shared between pools.
+		 */
+		if (state == POOL_STATE_SPARE && isspare) {
+			free(name);
+			(void) close(fd);
+			return (0);
+		}
+
+		if (state == POOL_STATE_ACTIVE ||
+		    state == POOL_STATE_SPARE || !force) {
+			switch (state) {
+			case POOL_STATE_SPARE:
+				vdev_error(gettext("%s is reserved as a hot "
+				    "spare for pool %s\n"), file, name);
+				break;
+			default:
+				vdev_error(gettext("%s is part of %s pool "
+				    "'%s'\n"), file, desc, name);
+				break;
+			}
+			ret = -1;
+		}
+
+		free(name);
+	}
+
+	(void) close(fd);
+	return (ret);
+}
+
+/*
+ * This may be a shorthand device path or it could be total gibberish.
+ * Check to see if it is a known device available in zfs_vdev_paths.
+ * As part of this check, see if we've been given an entire disk
+ * (minus the slice number).
+ */
+static int
+is_shorthand_path(const char *arg, char *path, size_t path_size,
+    struct stat64 *statbuf, boolean_t *wholedisk)
+{
+	int error;
+
+	error = zfs_resolve_shortname(arg, path, path_size);
+	if (error == 0) {
+		*wholedisk = zfs_dev_is_whole_disk(path);
+		if (*wholedisk || (stat64(path, statbuf) == 0))
+			return (0);
+	}
+
+	strlcpy(path, arg, path_size);
+	memset(statbuf, 0, sizeof (*statbuf));
+	*wholedisk = B_FALSE;
+
+	return (error);
+}
+
+/*
+ * Determine if the given path is a hot spare within the given configuration.
+ * If no configuration is given we rely solely on the label.
+ */
+static boolean_t
+is_spare(nvlist_t *config, const char *path)
+{
+	int fd;
+	pool_state_t state;
+	char *name = NULL;
+	nvlist_t *label;
+	uint64_t guid, spareguid;
+	nvlist_t *nvroot;
+	nvlist_t **spares;
+	uint_t i, nspares;
+	boolean_t inuse;
+
+	if ((fd = open(path, O_RDONLY|O_DIRECT)) < 0)
+		return (B_FALSE);
+
+	if (zpool_in_use(g_zfs, fd, &state, &name, &inuse) != 0 ||
+	    !inuse ||
+	    state != POOL_STATE_SPARE ||
+	    zpool_read_label(fd, &label, NULL) != 0) {
+		free(name);
+		(void) close(fd);
+		return (B_FALSE);
+	}
+	free(name);
+	(void) close(fd);
+
+	if (config == NULL) {
+		nvlist_free(label);
+		return (B_TRUE);
+	}
+
+	verify(nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) == 0);
+	nvlist_free(label);
+
+	verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+	    &nvroot) == 0);
+	if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
+	    &spares, &nspares) == 0) {
+		for (i = 0; i < nspares; i++) {
+			verify(nvlist_lookup_uint64(spares[i],
+			    ZPOOL_CONFIG_GUID, &spareguid) == 0);
+			if (spareguid == guid)
+				return (B_TRUE);
+		}
+	}
+
+	return (B_FALSE);
+}
+
+/*
+ * Create a leaf vdev.  Determine if this is a file or a device.  If it's a
+ * device, fill in the device id to make a complete nvlist.  Valid forms for a
+ * leaf vdev are:
+ *
+ *	/dev/xxx	Complete disk path
+ *	/xxx		Full path to file
+ *	xxx		Shorthand for <zfs_vdev_paths>/xxx
+ */
+static nvlist_t *
+make_leaf_vdev(nvlist_t *props, const char *arg, uint64_t is_log)
+{
+	char path[MAXPATHLEN];
+	struct stat64 statbuf;
+	nvlist_t *vdev = NULL;
+	char *type = NULL;
+	boolean_t wholedisk = B_FALSE;
+	uint64_t ashift = 0;
+	int err;
+
+	/*
+	 * Determine what type of vdev this is, and put the full path into
+	 * 'path'.  We detect whether this is a device of file afterwards by
+	 * checking the st_mode of the file.
+	 */
+	if (arg[0] == '/') {
+		/*
+		 * Complete device or file path.  Exact type is determined by
+		 * examining the file descriptor afterwards.  Symbolic links
+		 * are resolved to their real paths to determine whole disk
+		 * and S_ISBLK/S_ISREG type checks.  However, we are careful
+		 * to store the given path as ZPOOL_CONFIG_PATH to ensure we
+		 * can leverage udev's persistent device labels.
+		 */
+		if (realpath(arg, path) == NULL) {
+			(void) fprintf(stderr,
+			    gettext("cannot resolve path '%s'\n"), arg);
+			return (NULL);
+		}
+
+		wholedisk = zfs_dev_is_whole_disk(path);
+		if (!wholedisk && (stat64(path, &statbuf) != 0)) {
+			(void) fprintf(stderr,
+			    gettext("cannot open '%s': %s\n"),
+			    path, strerror(errno));
+			return (NULL);
+		}
+
+		/* After whole disk check restore original passed path */
+		strlcpy(path, arg, sizeof (path));
+	} else {
+		err = is_shorthand_path(arg, path, sizeof (path),
+		    &statbuf, &wholedisk);
+		if (err != 0) {
+			/*
+			 * If we got ENOENT, then the user gave us
+			 * gibberish, so try to direct them with a
+			 * reasonable error message.  Otherwise,
+			 * regurgitate strerror() since it's the best we
+			 * can do.
+			 */
+			if (err == ENOENT) {
+				(void) fprintf(stderr,
+				    gettext("cannot open '%s': no such "
+				    "device in %s\n"), arg, DISK_ROOT);
+				(void) fprintf(stderr,
+				    gettext("must be a full path or "
+				    "shorthand device name\n"));
+				return (NULL);
+			} else {
+				(void) fprintf(stderr,
+				    gettext("cannot open '%s': %s\n"),
+				    path, strerror(errno));
+				return (NULL);
+			}
+		}
+	}
+
+	/*
+	 * Determine whether this is a device or a file.
+	 */
+	if (wholedisk || S_ISBLK(statbuf.st_mode)) {
+		type = VDEV_TYPE_DISK;
+	} else if (S_ISREG(statbuf.st_mode)) {
+		type = VDEV_TYPE_FILE;
+	} else {
+		(void) fprintf(stderr, gettext("cannot use '%s': must be a "
+		    "block device or regular file\n"), path);
+		return (NULL);
+	}
+
+	/*
+	 * Finally, we have the complete device or file, and we know that it is
+	 * acceptable to use.  Construct the nvlist to describe this vdev.  All
+	 * vdevs have a 'path' element, and devices also have a 'devid' element.
+	 */
+	verify(nvlist_alloc(&vdev, NV_UNIQUE_NAME, 0) == 0);
+	verify(nvlist_add_string(vdev, ZPOOL_CONFIG_PATH, path) == 0);
+	verify(nvlist_add_string(vdev, ZPOOL_CONFIG_TYPE, type) == 0);
+	verify(nvlist_add_uint64(vdev, ZPOOL_CONFIG_IS_LOG, is_log) == 0);
+	if (is_log)
+		verify(nvlist_add_string(vdev, ZPOOL_CONFIG_ALLOCATION_BIAS,
+		    VDEV_ALLOC_BIAS_LOG) == 0);
+	if (strcmp(type, VDEV_TYPE_DISK) == 0)
+		verify(nvlist_add_uint64(vdev, ZPOOL_CONFIG_WHOLE_DISK,
+		    (uint64_t)wholedisk) == 0);
+
+	/*
+	 * Override defaults if custom properties are provided.
+	 */
+	if (props != NULL) {
+		char *value = NULL;
+
+		if (nvlist_lookup_string(props,
+		    zpool_prop_to_name(ZPOOL_PROP_ASHIFT), &value) == 0) {
+			if (zfs_nicestrtonum(NULL, value, &ashift) != 0) {
+				(void) fprintf(stderr,
+				    gettext("ashift must be a number.\n"));
+				return (NULL);
+			}
+			if (ashift != 0 &&
+			    (ashift < ASHIFT_MIN || ashift > ASHIFT_MAX)) {
+				(void) fprintf(stderr,
+				    gettext("invalid 'ashift=%" PRIu64 "' "
+				    "property: only values between %" PRId32 " "
+				    "and %" PRId32 " are allowed.\n"),
+				    ashift, ASHIFT_MIN, ASHIFT_MAX);
+				return (NULL);
+			}
+		}
+	}
+
+	/*
+	 * If the device is known to incorrectly report its physical sector
+	 * size explicitly provide the known correct value.
+	 */
+	if (ashift == 0) {
+		int sector_size;
+
+		if (check_sector_size_database(path, &sector_size) == B_TRUE)
+			ashift = highbit64(sector_size) - 1;
+	}
+
+	if (ashift > 0)
+		(void) nvlist_add_uint64(vdev, ZPOOL_CONFIG_ASHIFT, ashift);
+
+	return (vdev);
+}
+
+/*
+ * Go through and verify the replication level of the pool is consistent.
+ * Performs the following checks:
+ *
+ * 	For the new spec, verifies that devices in mirrors and raidz are the
+ * 	same size.
+ *
+ * 	If the current configuration already has inconsistent replication
+ * 	levels, ignore any other potential problems in the new spec.
+ *
+ * 	Otherwise, make sure that the current spec (if there is one) and the new
+ * 	spec have consistent replication levels.
+ *
+ *	If there is no current spec (create), make sure new spec has at least
+ *	one general purpose vdev.
+ */
+typedef struct replication_level {
+	char *zprl_type;
+	uint64_t zprl_children;
+	uint64_t zprl_parity;
+} replication_level_t;
+
+#define	ZPOOL_FUZZ	(16 * 1024 * 1024)
+
+static boolean_t
+is_raidz_mirror(replication_level_t *a, replication_level_t *b,
+    replication_level_t **raidz, replication_level_t **mirror)
+{
+	if (strcmp(a->zprl_type, "raidz") == 0 &&
+	    strcmp(b->zprl_type, "mirror") == 0) {
+		*raidz = a;
+		*mirror = b;
+		return (B_TRUE);
+	}
+	return (B_FALSE);
+}
+
+/*
+ * Given a list of toplevel vdevs, return the current replication level.  If
+ * the config is inconsistent, then NULL is returned.  If 'fatal' is set, then
+ * an error message will be displayed for each self-inconsistent vdev.
+ */
+static replication_level_t *
+get_replication(nvlist_t *nvroot, boolean_t fatal)
+{
+	nvlist_t **top;
+	uint_t t, toplevels;
+	nvlist_t **child;
+	uint_t c, children;
+	nvlist_t *nv;
+	char *type;
+	replication_level_t lastrep = {0};
+	replication_level_t rep;
+	replication_level_t *ret;
+	replication_level_t *raidz, *mirror;
+	boolean_t dontreport;
+
+	ret = safe_malloc(sizeof (replication_level_t));
+
+	verify(nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
+	    &top, &toplevels) == 0);
+
+	for (t = 0; t < toplevels; t++) {
+		uint64_t is_log = B_FALSE;
+
+		nv = top[t];
+
+		/*
+		 * For separate logs we ignore the top level vdev replication
+		 * constraints.
+		 */
+		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &is_log);
+		if (is_log)
+			continue;
+
+		/* Ignore holes introduced by removing aux devices */
+		verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);
+		if (strcmp(type, VDEV_TYPE_HOLE) == 0)
+			continue;
+
+		if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+		    &child, &children) != 0) {
+			/*
+			 * This is a 'file' or 'disk' vdev.
+			 */
+			rep.zprl_type = type;
+			rep.zprl_children = 1;
+			rep.zprl_parity = 0;
+		} else {
+			int64_t vdev_size;
+
+			/*
+			 * This is a mirror or RAID-Z vdev.  Go through and make
+			 * sure the contents are all the same (files vs. disks),
+			 * keeping track of the number of elements in the
+			 * process.
+			 *
+			 * We also check that the size of each vdev (if it can
+			 * be determined) is the same.
+			 */
+			rep.zprl_type = type;
+			rep.zprl_children = 0;
+
+			if (strcmp(type, VDEV_TYPE_RAIDZ) == 0) {
+				verify(nvlist_lookup_uint64(nv,
+				    ZPOOL_CONFIG_NPARITY,
+				    &rep.zprl_parity) == 0);
+				assert(rep.zprl_parity != 0);
+			} else {
+				rep.zprl_parity = 0;
+			}
+
+			/*
+			 * The 'dontreport' variable indicates that we've
+			 * already reported an error for this spec, so don't
+			 * bother doing it again.
+			 */
+			type = NULL;
+			dontreport = 0;
+			vdev_size = -1LL;
+			for (c = 0; c < children; c++) {
+				nvlist_t *cnv = child[c];
+				char *path;
+				struct stat64 statbuf;
+				int64_t size = -1LL;
+				char *childtype;
+				int fd, err;
+
+				rep.zprl_children++;
+
+				verify(nvlist_lookup_string(cnv,
+				    ZPOOL_CONFIG_TYPE, &childtype) == 0);
+
+				/*
+				 * If this is a replacing or spare vdev, then
+				 * get the real first child of the vdev: do this
+				 * in a loop because replacing and spare vdevs
+				 * can be nested.
+				 */
+				while (strcmp(childtype,
+				    VDEV_TYPE_REPLACING) == 0 ||
+				    strcmp(childtype, VDEV_TYPE_SPARE) == 0) {
+					nvlist_t **rchild;
+					uint_t rchildren;
+
+					verify(nvlist_lookup_nvlist_array(cnv,
+					    ZPOOL_CONFIG_CHILDREN, &rchild,
+					    &rchildren) == 0);
+					assert(rchildren == 2);
+					cnv = rchild[0];
+
+					verify(nvlist_lookup_string(cnv,
+					    ZPOOL_CONFIG_TYPE,
+					    &childtype) == 0);
+				}
+
+				verify(nvlist_lookup_string(cnv,
+				    ZPOOL_CONFIG_PATH, &path) == 0);
+
+				/*
+				 * If we have a raidz/mirror that combines disks
+				 * with files, report it as an error.
+				 */
+				if (!dontreport && type != NULL &&
+				    strcmp(type, childtype) != 0) {
+					if (ret != NULL)
+						free(ret);
+					ret = NULL;
+					if (fatal)
+						vdev_error(gettext(
+						    "mismatched replication "
+						    "level: %s contains both "
+						    "files and devices\n"),
+						    rep.zprl_type);
+					else
+						return (NULL);
+					dontreport = B_TRUE;
+				}
+
+				/*
+				 * According to stat(2), the value of 'st_size'
+				 * is undefined for block devices and character
+				 * devices.  But there is no effective way to
+				 * determine the real size in userland.
+				 *
+				 * Instead, we'll take advantage of an
+				 * implementation detail of spec_size().  If the
+				 * device is currently open, then we (should)
+				 * return a valid size.
+				 *
+				 * If we still don't get a valid size (indicated
+				 * by a size of 0 or MAXOFFSET_T), then ignore
+				 * this device altogether.
+				 */
+				if ((fd = open(path, O_RDONLY)) >= 0) {
+					err = fstat64_blk(fd, &statbuf);
+					(void) close(fd);
+				} else {
+					err = stat64(path, &statbuf);
+				}
+
+				if (err != 0 ||
+				    statbuf.st_size == 0 ||
+				    statbuf.st_size == MAXOFFSET_T)
+					continue;
+
+				size = statbuf.st_size;
+
+				/*
+				 * Also make sure that devices and
+				 * slices have a consistent size.  If
+				 * they differ by a significant amount
+				 * (~16MB) then report an error.
+				 */
+				if (!dontreport &&
+				    (vdev_size != -1LL &&
+				    (llabs(size - vdev_size) >
+				    ZPOOL_FUZZ))) {
+					if (ret != NULL)
+						free(ret);
+					ret = NULL;
+					if (fatal)
+						vdev_error(gettext(
+						    "%s contains devices of "
+						    "different sizes\n"),
+						    rep.zprl_type);
+					else
+						return (NULL);
+					dontreport = B_TRUE;
+				}
+
+				type = childtype;
+				vdev_size = size;
+			}
+		}
+
+		/*
+		 * At this point, we have the replication of the last toplevel
+		 * vdev in 'rep'.  Compare it to 'lastrep' to see if it is
+		 * different.
+		 */
+		if (lastrep.zprl_type != NULL) {
+			if (is_raidz_mirror(&lastrep, &rep, &raidz, &mirror) ||
+			    is_raidz_mirror(&rep, &lastrep, &raidz, &mirror)) {
+				/*
+				 * Accepted raidz and mirror when they can
+				 * handle the same number of disk failures.
+				 */
+				if (raidz->zprl_parity !=
+				    mirror->zprl_children - 1) {
+					if (ret != NULL)
+						free(ret);
+					ret = NULL;
+					if (fatal)
+						vdev_error(gettext(
+						    "mismatched replication "
+						    "level: "
+						    "%s and %s vdevs with "
+						    "different redundancy, "
+						    "%llu vs. %llu (%llu-way) "
+						    "are present\n"),
+						    raidz->zprl_type,
+						    mirror->zprl_type,
+						    raidz->zprl_parity,
+						    mirror->zprl_children - 1,
+						    mirror->zprl_children);
+					else
+						return (NULL);
+				}
+			} else if (strcmp(lastrep.zprl_type, rep.zprl_type) !=
+			    0) {
+				if (ret != NULL)
+					free(ret);
+				ret = NULL;
+				if (fatal)
+					vdev_error(gettext(
+					    "mismatched replication level: "
+					    "both %s and %s vdevs are "
+					    "present\n"),
+					    lastrep.zprl_type, rep.zprl_type);
+				else
+					return (NULL);
+			} else if (lastrep.zprl_parity != rep.zprl_parity) {
+				if (ret)
+					free(ret);
+				ret = NULL;
+				if (fatal)
+					vdev_error(gettext(
+					    "mismatched replication level: "
+					    "both %llu and %llu device parity "
+					    "%s vdevs are present\n"),
+					    lastrep.zprl_parity,
+					    rep.zprl_parity,
+					    rep.zprl_type);
+				else
+					return (NULL);
+			} else if (lastrep.zprl_children != rep.zprl_children) {
+				if (ret)
+					free(ret);
+				ret = NULL;
+				if (fatal)
+					vdev_error(gettext(
+					    "mismatched replication level: "
+					    "both %llu-way and %llu-way %s "
+					    "vdevs are present\n"),
+					    lastrep.zprl_children,
+					    rep.zprl_children,
+					    rep.zprl_type);
+				else
+					return (NULL);
+			}
+		}
+		lastrep = rep;
+	}
+
+	if (ret != NULL)
+		*ret = rep;
+
+	return (ret);
+}
+
+/*
+ * Check the replication level of the vdev spec against the current pool.  Calls
+ * get_replication() to make sure the new spec is self-consistent.  If the pool
+ * has a consistent replication level, then we ignore any errors.  Otherwise,
+ * report any difference between the two.
+ */
+static int
+check_replication(nvlist_t *config, nvlist_t *newroot)
+{
+	nvlist_t **child;
+	uint_t	children;
+	replication_level_t *current = NULL, *new;
+	replication_level_t *raidz, *mirror;
+	int ret;
+
+	/*
+	 * If we have a current pool configuration, check to see if it's
+	 * self-consistent.  If not, simply return success.
+	 */
+	if (config != NULL) {
+		nvlist_t *nvroot;
+
+		verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+		    &nvroot) == 0);
+		if ((current = get_replication(nvroot, B_FALSE)) == NULL)
+			return (0);
+	}
+	/*
+	 * for spares there may be no children, and therefore no
+	 * replication level to check
+	 */
+	if ((nvlist_lookup_nvlist_array(newroot, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0) || (children == 0)) {
+		free(current);
+		return (0);
+	}
+
+	/*
+	 * If all we have is logs then there's no replication level to check.
+	 */
+	if (num_logs(newroot) == children) {
+		free(current);
+		return (0);
+	}
+
+	/*
+	 * Get the replication level of the new vdev spec, reporting any
+	 * inconsistencies found.
+	 */
+	if ((new = get_replication(newroot, B_TRUE)) == NULL) {
+		free(current);
+		return (-1);
+	}
+
+	/*
+	 * Check to see if the new vdev spec matches the replication level of
+	 * the current pool.
+	 */
+	ret = 0;
+	if (current != NULL) {
+		if (is_raidz_mirror(current, new, &raidz, &mirror) ||
+		    is_raidz_mirror(new, current, &raidz, &mirror)) {
+			if (raidz->zprl_parity != mirror->zprl_children - 1) {
+				vdev_error(gettext(
+				    "mismatched replication level: pool and "
+				    "new vdev with different redundancy, %s "
+				    "and %s vdevs, %llu vs. %llu (%llu-way)\n"),
+				    raidz->zprl_type,
+				    mirror->zprl_type,
+				    raidz->zprl_parity,
+				    mirror->zprl_children - 1,
+				    mirror->zprl_children);
+				ret = -1;
+			}
+		} else if (strcmp(current->zprl_type, new->zprl_type) != 0) {
+			vdev_error(gettext(
+			    "mismatched replication level: pool uses %s "
+			    "and new vdev is %s\n"),
+			    current->zprl_type, new->zprl_type);
+			ret = -1;
+		} else if (current->zprl_parity != new->zprl_parity) {
+			vdev_error(gettext(
+			    "mismatched replication level: pool uses %llu "
+			    "device parity and new vdev uses %llu\n"),
+			    current->zprl_parity, new->zprl_parity);
+			ret = -1;
+		} else if (current->zprl_children != new->zprl_children) {
+			vdev_error(gettext(
+			    "mismatched replication level: pool uses %llu-way "
+			    "%s and new vdev uses %llu-way %s\n"),
+			    current->zprl_children, current->zprl_type,
+			    new->zprl_children, new->zprl_type);
+			ret = -1;
+		}
+	}
+
+	free(new);
+	if (current != NULL)
+		free(current);
+
+	return (ret);
+}
+
+static int
+zero_label(char *path)
+{
+	const int size = 4096;
+	char buf[size];
+	int err, fd;
+
+	if ((fd = open(path, O_WRONLY|O_EXCL)) < 0) {
+		(void) fprintf(stderr, gettext("cannot open '%s': %s\n"),
+		    path, strerror(errno));
+		return (-1);
+	}
+
+	memset(buf, 0, size);
+	err = write(fd, buf, size);
+	(void) fdatasync(fd);
+	(void) close(fd);
+
+	if (err == -1) {
+		(void) fprintf(stderr, gettext("cannot zero first %d bytes "
+		    "of '%s': %s\n"), size, path, strerror(errno));
+		return (-1);
+	}
+
+	if (err != size) {
+		(void) fprintf(stderr, gettext("could only zero %d/%d bytes "
+		    "of '%s'\n"), err, size, path);
+		return (-1);
+	}
+
+	return (0);
+}
+
+/*
+ * Go through and find any whole disks in the vdev specification, labelling them
+ * as appropriate.  When constructing the vdev spec, we were unable to open this
+ * device in order to provide a devid.  Now that we have labelled the disk and
+ * know that slice 0 is valid, we can construct the devid now.
+ *
+ * If the disk was already labeled with an EFI label, we will have gotten the
+ * devid already (because we were able to open the whole disk).  Otherwise, we
+ * need to get the devid after we label the disk.
+ */
+static int
+make_disks(zpool_handle_t *zhp, nvlist_t *nv)
+{
+	nvlist_t **child;
+	uint_t c, children;
+	char *type, *path;
+	char devpath[MAXPATHLEN];
+	char udevpath[MAXPATHLEN];
+	uint64_t wholedisk;
+	struct stat64 statbuf;
+	int is_exclusive = 0;
+	int fd;
+	int ret;
+
+	verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0) {
+
+		if (strcmp(type, VDEV_TYPE_DISK) != 0)
+			return (0);
+
+		/*
+		 * We have a disk device.  If this is a whole disk write
+		 * out the efi partition table, otherwise write zero's to
+		 * the first 4k of the partition.  This is to ensure that
+		 * libblkid will not misidentify the partition due to a
+		 * magic value left by the previous filesystem.
+		 */
+		verify(!nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path));
+		verify(!nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
+		    &wholedisk));
+
+		if (!wholedisk) {
+			/*
+			 * Update device id string for mpath nodes (Linux only)
+			 */
+			if (is_mpath_whole_disk(path))
+				update_vdev_config_dev_strs(nv);
+
+			if (!is_spare(NULL, path))
+				(void) zero_label(path);
+			return (0);
+		}
+
+		if (realpath(path, devpath) == NULL) {
+			ret = errno;
+			(void) fprintf(stderr,
+			    gettext("cannot resolve path '%s'\n"), path);
+			return (ret);
+		}
+
+		/*
+		 * Remove any previously existing symlink from a udev path to
+		 * the device before labeling the disk.  This ensures that
+		 * only newly created links are used.  Otherwise there is a
+		 * window between when udev deletes and recreates the link
+		 * during which access attempts will fail with ENOENT.
+		 */
+		strlcpy(udevpath, path, MAXPATHLEN);
+		(void) zfs_append_partition(udevpath, MAXPATHLEN);
+
+		fd = open(devpath, O_RDWR|O_EXCL);
+		if (fd == -1) {
+			if (errno == EBUSY)
+				is_exclusive = 1;
+#ifdef __FreeBSD__
+			if (errno == EPERM)
+				is_exclusive = 1;
+#endif
+		} else {
+			(void) close(fd);
+		}
+
+		/*
+		 * If the partition exists, contains a valid spare label,
+		 * and is opened exclusively there is no need to partition
+		 * it.  Hot spares have already been partitioned and are
+		 * held open exclusively by the kernel as a safety measure.
+		 *
+		 * If the provided path is for a /dev/disk/ device its
+		 * symbolic link will be removed, partition table created,
+		 * and then block until udev creates the new link.
+		 */
+		if (!is_exclusive && !is_spare(NULL, udevpath)) {
+			char *devnode = strrchr(devpath, '/') + 1;
+
+			ret = strncmp(udevpath, UDISK_ROOT, strlen(UDISK_ROOT));
+			if (ret == 0) {
+				ret = lstat64(udevpath, &statbuf);
+				if (ret == 0 && S_ISLNK(statbuf.st_mode))
+					(void) unlink(udevpath);
+			}
+
+			/*
+			 * When labeling a pool the raw device node name
+			 * is provided as it appears under /dev/.
+			 */
+			if (zpool_label_disk(g_zfs, zhp, devnode) == -1)
+				return (-1);
+
+			/*
+			 * Wait for udev to signal the device is available
+			 * by the provided path.
+			 */
+			ret = zpool_label_disk_wait(udevpath, DISK_LABEL_WAIT);
+			if (ret) {
+				(void) fprintf(stderr,
+				    gettext("missing link: %s was "
+				    "partitioned but %s is missing\n"),
+				    devnode, udevpath);
+				return (ret);
+			}
+
+			ret = zero_label(udevpath);
+			if (ret)
+				return (ret);
+		}
+
+		/*
+		 * Update the path to refer to the partition.  The presence of
+		 * the 'whole_disk' field indicates to the CLI that we should
+		 * chop off the partition number when displaying the device in
+		 * future output.
+		 */
+		verify(nvlist_add_string(nv, ZPOOL_CONFIG_PATH, udevpath) == 0);
+
+		/*
+		 * Update device id strings for whole disks (Linux only)
+		 */
+		update_vdev_config_dev_strs(nv);
+
+		return (0);
+	}
+
+	for (c = 0; c < children; c++)
+		if ((ret = make_disks(zhp, child[c])) != 0)
+			return (ret);
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES,
+	    &child, &children) == 0)
+		for (c = 0; c < children; c++)
+			if ((ret = make_disks(zhp, child[c])) != 0)
+				return (ret);
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
+	    &child, &children) == 0)
+		for (c = 0; c < children; c++)
+			if ((ret = make_disks(zhp, child[c])) != 0)
+				return (ret);
+
+	return (0);
+}
+
+/*
+ * Go through and find any devices that are in use.  We rely on libdiskmgt for
+ * the majority of this task.
+ */
+static boolean_t
+is_device_in_use(nvlist_t *config, nvlist_t *nv, boolean_t force,
+    boolean_t replacing, boolean_t isspare)
+{
+	nvlist_t **child;
+	uint_t c, children;
+	char *type, *path;
+	int ret = 0;
+	char buf[MAXPATHLEN];
+	uint64_t wholedisk = B_FALSE;
+	boolean_t anyinuse = B_FALSE;
+
+	verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0) {
+
+		verify(!nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path));
+		if (strcmp(type, VDEV_TYPE_DISK) == 0)
+			verify(!nvlist_lookup_uint64(nv,
+			    ZPOOL_CONFIG_WHOLE_DISK, &wholedisk));
+
+		/*
+		 * As a generic check, we look to see if this is a replace of a
+		 * hot spare within the same pool.  If so, we allow it
+		 * regardless of what libblkid or zpool_in_use() says.
+		 */
+		if (replacing) {
+			(void) strlcpy(buf, path, sizeof (buf));
+			if (wholedisk) {
+				ret = zfs_append_partition(buf,  sizeof (buf));
+				if (ret == -1)
+					return (-1);
+			}
+
+			if (is_spare(config, buf))
+				return (B_FALSE);
+		}
+
+		if (strcmp(type, VDEV_TYPE_DISK) == 0)
+			ret = check_device(path, force, isspare, wholedisk);
+
+		else if (strcmp(type, VDEV_TYPE_FILE) == 0)
+			ret = check_file(path, force, isspare);
+
+		return (ret != 0);
+	}
+
+	for (c = 0; c < children; c++)
+		if (is_device_in_use(config, child[c], force, replacing,
+		    B_FALSE))
+			anyinuse = B_TRUE;
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES,
+	    &child, &children) == 0)
+		for (c = 0; c < children; c++)
+			if (is_device_in_use(config, child[c], force, replacing,
+			    B_TRUE))
+				anyinuse = B_TRUE;
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
+	    &child, &children) == 0)
+		for (c = 0; c < children; c++)
+			if (is_device_in_use(config, child[c], force, replacing,
+			    B_FALSE))
+				anyinuse = B_TRUE;
+
+	return (anyinuse);
+}
+
+static const char *
+is_grouping(const char *type, int *mindev, int *maxdev)
+{
+	if (strncmp(type, "raidz", 5) == 0) {
+		const char *p = type + 5;
+		char *end;
+		long nparity;
+
+		if (*p == '\0') {
+			nparity = 1;
+		} else if (*p == '0') {
+			return (NULL); /* no zero prefixes allowed */
+		} else {
+			errno = 0;
+			nparity = strtol(p, &end, 10);
+			if (errno != 0 || nparity < 1 || nparity >= 255 ||
+			    *end != '\0')
+				return (NULL);
+		}
+
+		if (mindev != NULL)
+			*mindev = nparity + 1;
+		if (maxdev != NULL)
+			*maxdev = 255;
+		return (VDEV_TYPE_RAIDZ);
+	}
+
+	if (maxdev != NULL)
+		*maxdev = INT_MAX;
+
+	if (strcmp(type, "mirror") == 0) {
+		if (mindev != NULL)
+			*mindev = 2;
+		return (VDEV_TYPE_MIRROR);
+	}
+
+	if (strcmp(type, "spare") == 0) {
+		if (mindev != NULL)
+			*mindev = 1;
+		return (VDEV_TYPE_SPARE);
+	}
+
+	if (strcmp(type, "log") == 0) {
+		if (mindev != NULL)
+			*mindev = 1;
+		return (VDEV_TYPE_LOG);
+	}
+
+	if (strcmp(type, VDEV_ALLOC_BIAS_SPECIAL) == 0 ||
+	    strcmp(type, VDEV_ALLOC_BIAS_DEDUP) == 0) {
+		if (mindev != NULL)
+			*mindev = 1;
+		return (type);
+	}
+
+	if (strcmp(type, "cache") == 0) {
+		if (mindev != NULL)
+			*mindev = 1;
+		return (VDEV_TYPE_L2CACHE);
+	}
+
+	return (NULL);
+}
+
+/*
+ * Construct a syntactically valid vdev specification,
+ * and ensure that all devices and files exist and can be opened.
+ * Note: we don't bother freeing anything in the error paths
+ * because the program is just going to exit anyway.
+ */
+static nvlist_t *
+construct_spec(nvlist_t *props, int argc, char **argv)
+{
+	nvlist_t *nvroot, *nv, **top, **spares, **l2cache;
+	int t, toplevels, mindev, maxdev, nspares, nlogs, nl2cache;
+	const char *type;
+	uint64_t is_log, is_special, is_dedup;
+	boolean_t seen_logs;
+
+	top = NULL;
+	toplevels = 0;
+	spares = NULL;
+	l2cache = NULL;
+	nspares = 0;
+	nlogs = 0;
+	nl2cache = 0;
+	is_log = is_special = is_dedup = B_FALSE;
+	seen_logs = B_FALSE;
+	nvroot = NULL;
+
+	while (argc > 0) {
+		nv = NULL;
+
+		/*
+		 * If it's a mirror or raidz, the subsequent arguments are
+		 * its leaves -- until we encounter the next mirror or raidz.
+		 */
+		if ((type = is_grouping(argv[0], &mindev, &maxdev)) != NULL) {
+			nvlist_t **child = NULL;
+			int c, children = 0;
+
+			if (strcmp(type, VDEV_TYPE_SPARE) == 0) {
+				if (spares != NULL) {
+					(void) fprintf(stderr,
+					    gettext("invalid vdev "
+					    "specification: 'spare' can be "
+					    "specified only once\n"));
+					goto spec_out;
+				}
+				is_log = is_special = is_dedup = B_FALSE;
+			}
+
+			if (strcmp(type, VDEV_TYPE_LOG) == 0) {
+				if (seen_logs) {
+					(void) fprintf(stderr,
+					    gettext("invalid vdev "
+					    "specification: 'log' can be "
+					    "specified only once\n"));
+					goto spec_out;
+				}
+				seen_logs = B_TRUE;
+				is_log = B_TRUE;
+				is_special = B_FALSE;
+				is_dedup = B_FALSE;
+				argc--;
+				argv++;
+				/*
+				 * A log is not a real grouping device.
+				 * We just set is_log and continue.
+				 */
+				continue;
+			}
+
+			if (strcmp(type, VDEV_ALLOC_BIAS_SPECIAL) == 0) {
+				is_special = B_TRUE;
+				is_log = B_FALSE;
+				is_dedup = B_FALSE;
+				argc--;
+				argv++;
+				continue;
+			}
+
+			if (strcmp(type, VDEV_ALLOC_BIAS_DEDUP) == 0) {
+				is_dedup = B_TRUE;
+				is_log = B_FALSE;
+				is_special = B_FALSE;
+				argc--;
+				argv++;
+				continue;
+			}
+
+			if (strcmp(type, VDEV_TYPE_L2CACHE) == 0) {
+				if (l2cache != NULL) {
+					(void) fprintf(stderr,
+					    gettext("invalid vdev "
+					    "specification: 'cache' can be "
+					    "specified only once\n"));
+					goto spec_out;
+				}
+				is_log = is_special = is_dedup = B_FALSE;
+			}
+
+			if (is_log || is_special || is_dedup) {
+				if (strcmp(type, VDEV_TYPE_MIRROR) != 0) {
+					(void) fprintf(stderr,
+					    gettext("invalid vdev "
+					    "specification: unsupported '%s' "
+					    "device: %s\n"), is_log ? "log" :
+					    "special", type);
+					goto spec_out;
+				}
+				nlogs++;
+			}
+
+			for (c = 1; c < argc; c++) {
+				if (is_grouping(argv[c], NULL, NULL) != NULL)
+					break;
+				children++;
+				child = realloc(child,
+				    children * sizeof (nvlist_t *));
+				if (child == NULL)
+					zpool_no_memory();
+				if ((nv = make_leaf_vdev(props, argv[c],
+				    B_FALSE)) == NULL) {
+					for (c = 0; c < children - 1; c++)
+						nvlist_free(child[c]);
+					free(child);
+					goto spec_out;
+				}
+
+				child[children - 1] = nv;
+			}
+
+			if (children < mindev) {
+				(void) fprintf(stderr, gettext("invalid vdev "
+				    "specification: %s requires at least %d "
+				    "devices\n"), argv[0], mindev);
+				for (c = 0; c < children; c++)
+					nvlist_free(child[c]);
+				free(child);
+				goto spec_out;
+			}
+
+			if (children > maxdev) {
+				(void) fprintf(stderr, gettext("invalid vdev "
+				    "specification: %s supports no more than "
+				    "%d devices\n"), argv[0], maxdev);
+				for (c = 0; c < children; c++)
+					nvlist_free(child[c]);
+				free(child);
+				goto spec_out;
+			}
+
+			argc -= c;
+			argv += c;
+
+			if (strcmp(type, VDEV_TYPE_SPARE) == 0) {
+				spares = child;
+				nspares = children;
+				continue;
+			} else if (strcmp(type, VDEV_TYPE_L2CACHE) == 0) {
+				l2cache = child;
+				nl2cache = children;
+				continue;
+			} else {
+				/* create a top-level vdev with children */
+				verify(nvlist_alloc(&nv, NV_UNIQUE_NAME,
+				    0) == 0);
+				verify(nvlist_add_string(nv, ZPOOL_CONFIG_TYPE,
+				    type) == 0);
+				verify(nvlist_add_uint64(nv,
+				    ZPOOL_CONFIG_IS_LOG, is_log) == 0);
+				if (is_log)
+					verify(nvlist_add_string(nv,
+					    ZPOOL_CONFIG_ALLOCATION_BIAS,
+					    VDEV_ALLOC_BIAS_LOG) == 0);
+				if (is_special) {
+					verify(nvlist_add_string(nv,
+					    ZPOOL_CONFIG_ALLOCATION_BIAS,
+					    VDEV_ALLOC_BIAS_SPECIAL) == 0);
+				}
+				if (is_dedup) {
+					verify(nvlist_add_string(nv,
+					    ZPOOL_CONFIG_ALLOCATION_BIAS,
+					    VDEV_ALLOC_BIAS_DEDUP) == 0);
+				}
+				if (strcmp(type, VDEV_TYPE_RAIDZ) == 0) {
+					verify(nvlist_add_uint64(nv,
+					    ZPOOL_CONFIG_NPARITY,
+					    mindev - 1) == 0);
+				}
+				verify(nvlist_add_nvlist_array(nv,
+				    ZPOOL_CONFIG_CHILDREN, child,
+				    children) == 0);
+
+				for (c = 0; c < children; c++)
+					nvlist_free(child[c]);
+				free(child);
+			}
+		} else {
+			/*
+			 * We have a device.  Pass off to make_leaf_vdev() to
+			 * construct the appropriate nvlist describing the vdev.
+			 */
+			if ((nv = make_leaf_vdev(props, argv[0],
+			    is_log)) == NULL)
+				goto spec_out;
+
+			if (is_log)
+				nlogs++;
+			if (is_special) {
+				verify(nvlist_add_string(nv,
+				    ZPOOL_CONFIG_ALLOCATION_BIAS,
+				    VDEV_ALLOC_BIAS_SPECIAL) == 0);
+			}
+			if (is_dedup) {
+				verify(nvlist_add_string(nv,
+				    ZPOOL_CONFIG_ALLOCATION_BIAS,
+				    VDEV_ALLOC_BIAS_DEDUP) == 0);
+			}
+			argc--;
+			argv++;
+		}
+
+		toplevels++;
+		top = realloc(top, toplevels * sizeof (nvlist_t *));
+		if (top == NULL)
+			zpool_no_memory();
+		top[toplevels - 1] = nv;
+	}
+
+	if (toplevels == 0 && nspares == 0 && nl2cache == 0) {
+		(void) fprintf(stderr, gettext("invalid vdev "
+		    "specification: at least one toplevel vdev must be "
+		    "specified\n"));
+		goto spec_out;
+	}
+
+	if (seen_logs && nlogs == 0) {
+		(void) fprintf(stderr, gettext("invalid vdev specification: "
+		    "log requires at least 1 device\n"));
+		goto spec_out;
+	}
+
+	/*
+	 * Finally, create nvroot and add all top-level vdevs to it.
+	 */
+	verify(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, 0) == 0);
+	verify(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
+	    VDEV_TYPE_ROOT) == 0);
+	verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
+	    top, toplevels) == 0);
+	if (nspares != 0)
+		verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
+		    spares, nspares) == 0);
+	if (nl2cache != 0)
+		verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
+		    l2cache, nl2cache) == 0);
+
+spec_out:
+	for (t = 0; t < toplevels; t++)
+		nvlist_free(top[t]);
+	for (t = 0; t < nspares; t++)
+		nvlist_free(spares[t]);
+	for (t = 0; t < nl2cache; t++)
+		nvlist_free(l2cache[t]);
+
+	free(spares);
+	free(l2cache);
+	free(top);
+
+	return (nvroot);
+}
+
+nvlist_t *
+split_mirror_vdev(zpool_handle_t *zhp, char *newname, nvlist_t *props,
+    splitflags_t flags, int argc, char **argv)
+{
+	nvlist_t *newroot = NULL, **child;
+	uint_t c, children;
+
+	if (argc > 0) {
+		if ((newroot = construct_spec(props, argc, argv)) == NULL) {
+			(void) fprintf(stderr, gettext("Unable to build a "
+			    "pool from the specified devices\n"));
+			return (NULL);
+		}
+
+		if (!flags.dryrun && make_disks(zhp, newroot) != 0) {
+			nvlist_free(newroot);
+			return (NULL);
+		}
+
+		/* avoid any tricks in the spec */
+		verify(nvlist_lookup_nvlist_array(newroot,
+		    ZPOOL_CONFIG_CHILDREN, &child, &children) == 0);
+		for (c = 0; c < children; c++) {
+			char *path;
+			const char *type;
+			int min, max;
+
+			verify(nvlist_lookup_string(child[c],
+			    ZPOOL_CONFIG_PATH, &path) == 0);
+			if ((type = is_grouping(path, &min, &max)) != NULL) {
+				(void) fprintf(stderr, gettext("Cannot use "
+				    "'%s' as a device for splitting\n"), type);
+				nvlist_free(newroot);
+				return (NULL);
+			}
+		}
+	}
+
+	if (zpool_vdev_split(zhp, newname, &newroot, props, flags) != 0) {
+		nvlist_free(newroot);
+		return (NULL);
+	}
+
+	return (newroot);
+}
+
+static int
+num_normal_vdevs(nvlist_t *nvroot)
+{
+	nvlist_t **top;
+	uint_t t, toplevels, normal = 0;
+
+	verify(nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
+	    &top, &toplevels) == 0);
+
+	for (t = 0; t < toplevels; t++) {
+		uint64_t log = B_FALSE;
+
+		(void) nvlist_lookup_uint64(top[t], ZPOOL_CONFIG_IS_LOG, &log);
+		if (log)
+			continue;
+		if (nvlist_exists(top[t], ZPOOL_CONFIG_ALLOCATION_BIAS))
+			continue;
+
+		normal++;
+	}
+
+	return (normal);
+}
+
+/*
+ * Get and validate the contents of the given vdev specification.  This ensures
+ * that the nvlist returned is well-formed, that all the devices exist, and that
+ * they are not currently in use by any other known consumer.  The 'poolconfig'
+ * parameter is the current configuration of the pool when adding devices
+ * existing pool, and is used to perform additional checks, such as changing the
+ * replication level of the pool.  It can be 'NULL' to indicate that this is a
+ * new pool.  The 'force' flag controls whether devices should be forcefully
+ * added, even if they appear in use.
+ */
+nvlist_t *
+make_root_vdev(zpool_handle_t *zhp, nvlist_t *props, int force, int check_rep,
+    boolean_t replacing, boolean_t dryrun, int argc, char **argv)
+{
+	nvlist_t *newroot;
+	nvlist_t *poolconfig = NULL;
+	is_force = force;
+
+	/*
+	 * Construct the vdev specification.  If this is successful, we know
+	 * that we have a valid specification, and that all devices can be
+	 * opened.
+	 */
+	if ((newroot = construct_spec(props, argc, argv)) == NULL)
+		return (NULL);
+
+	if (zhp && ((poolconfig = zpool_get_config(zhp, NULL)) == NULL)) {
+		nvlist_free(newroot);
+		return (NULL);
+	}
+
+	/*
+	 * Validate each device to make sure that it's not shared with another
+	 * subsystem.  We do this even if 'force' is set, because there are some
+	 * uses (such as a dedicated dump device) that even '-f' cannot
+	 * override.
+	 */
+	if (is_device_in_use(poolconfig, newroot, force, replacing, B_FALSE)) {
+		nvlist_free(newroot);
+		return (NULL);
+	}
+
+	/*
+	 * Check the replication level of the given vdevs and report any errors
+	 * found.  We include the existing pool spec, if any, as we need to
+	 * catch changes against the existing replication level.
+	 */
+	if (check_rep && check_replication(poolconfig, newroot) != 0) {
+		nvlist_free(newroot);
+		return (NULL);
+	}
+
+	/*
+	 * On pool create the new vdev spec must have one normal vdev.
+	 */
+	if (poolconfig == NULL && num_normal_vdevs(newroot) == 0) {
+		vdev_error(gettext("at least one general top-level vdev must "
+		    "be specified\n"));
+		nvlist_free(newroot);
+		return (NULL);
+	}
+
+	/*
+	 * Run through the vdev specification and label any whole disks found.
+	 */
+	if (!dryrun && make_disks(zhp, newroot) != 0) {
+		nvlist_free(newroot);
+		return (NULL);
+	}
+
+	return (newroot);
+}