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Diffstat (limited to 'sys/contrib/openzfs/lib/libefi/rdwr_efi.c')
-rw-r--r--sys/contrib/openzfs/lib/libefi/rdwr_efi.c1655
1 files changed, 1655 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/lib/libefi/rdwr_efi.c b/sys/contrib/openzfs/lib/libefi/rdwr_efi.c
new file mode 100644
index 000000000000..2cb093f9601d
--- /dev/null
+++ b/sys/contrib/openzfs/lib/libefi/rdwr_efi.c
@@ -0,0 +1,1655 @@
+/*
+ * 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) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
+ * Copyright (c) 2018 by Delphix. All rights reserved.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <strings.h>
+#include <unistd.h>
+#include <uuid/uuid.h>
+#include <zlib.h>
+#include <libintl.h>
+#include <sys/types.h>
+#include <sys/dkio.h>
+#include <sys/vtoc.h>
+#include <sys/mhd.h>
+#include <sys/param.h>
+#include <sys/dktp/fdisk.h>
+#include <sys/efi_partition.h>
+#include <sys/byteorder.h>
+#include <sys/vdev_disk.h>
+#include <linux/fs.h>
+
+static struct uuid_to_ptag {
+ struct uuid uuid;
+} conversion_array[] = {
+ { EFI_UNUSED },
+ { EFI_BOOT },
+ { EFI_ROOT },
+ { EFI_SWAP },
+ { EFI_USR },
+ { EFI_BACKUP },
+ { EFI_UNUSED }, /* STAND is never used */
+ { EFI_VAR },
+ { EFI_HOME },
+ { EFI_ALTSCTR },
+ { EFI_UNUSED }, /* CACHE (cachefs) is never used */
+ { EFI_RESERVED },
+ { EFI_SYSTEM },
+ { EFI_LEGACY_MBR },
+ { EFI_SYMC_PUB },
+ { EFI_SYMC_CDS },
+ { EFI_MSFT_RESV },
+ { EFI_DELL_BASIC },
+ { EFI_DELL_RAID },
+ { EFI_DELL_SWAP },
+ { EFI_DELL_LVM },
+ { EFI_DELL_RESV },
+ { EFI_AAPL_HFS },
+ { EFI_AAPL_UFS },
+ { EFI_FREEBSD_BOOT },
+ { EFI_FREEBSD_SWAP },
+ { EFI_FREEBSD_UFS },
+ { EFI_FREEBSD_VINUM },
+ { EFI_FREEBSD_ZFS },
+ { EFI_BIOS_BOOT },
+ { EFI_INTC_RS },
+ { EFI_SNE_BOOT },
+ { EFI_LENOVO_BOOT },
+ { EFI_MSFT_LDMM },
+ { EFI_MSFT_LDMD },
+ { EFI_MSFT_RE },
+ { EFI_IBM_GPFS },
+ { EFI_MSFT_STORAGESPACES },
+ { EFI_HPQ_DATA },
+ { EFI_HPQ_SVC },
+ { EFI_RHT_DATA },
+ { EFI_RHT_HOME },
+ { EFI_RHT_SRV },
+ { EFI_RHT_DMCRYPT },
+ { EFI_RHT_LUKS },
+ { EFI_FREEBSD_DISKLABEL },
+ { EFI_AAPL_RAID },
+ { EFI_AAPL_RAIDOFFLINE },
+ { EFI_AAPL_BOOT },
+ { EFI_AAPL_LABEL },
+ { EFI_AAPL_TVRECOVERY },
+ { EFI_AAPL_CORESTORAGE },
+ { EFI_NETBSD_SWAP },
+ { EFI_NETBSD_FFS },
+ { EFI_NETBSD_LFS },
+ { EFI_NETBSD_RAID },
+ { EFI_NETBSD_CAT },
+ { EFI_NETBSD_CRYPT },
+ { EFI_GOOG_KERN },
+ { EFI_GOOG_ROOT },
+ { EFI_GOOG_RESV },
+ { EFI_HAIKU_BFS },
+ { EFI_MIDNIGHTBSD_BOOT },
+ { EFI_MIDNIGHTBSD_DATA },
+ { EFI_MIDNIGHTBSD_SWAP },
+ { EFI_MIDNIGHTBSD_UFS },
+ { EFI_MIDNIGHTBSD_VINUM },
+ { EFI_MIDNIGHTBSD_ZFS },
+ { EFI_CEPH_JOURNAL },
+ { EFI_CEPH_DMCRYPTJOURNAL },
+ { EFI_CEPH_OSD },
+ { EFI_CEPH_DMCRYPTOSD },
+ { EFI_CEPH_CREATE },
+ { EFI_CEPH_DMCRYPTCREATE },
+ { EFI_OPENBSD_DISKLABEL },
+ { EFI_BBRY_QNX },
+ { EFI_BELL_PLAN9 },
+ { EFI_VMW_KCORE },
+ { EFI_VMW_VMFS },
+ { EFI_VMW_RESV },
+ { EFI_RHT_ROOTX86 },
+ { EFI_RHT_ROOTAMD64 },
+ { EFI_RHT_ROOTARM },
+ { EFI_RHT_ROOTARM64 },
+ { EFI_ACRONIS_SECUREZONE },
+ { EFI_ONIE_BOOT },
+ { EFI_ONIE_CONFIG },
+ { EFI_IBM_PPRPBOOT },
+ { EFI_FREEDESKTOP_BOOT }
+};
+
+/*
+ * Default vtoc information for non-SVr4 partitions
+ */
+struct dk_map2 default_vtoc_map[NDKMAP] = {
+ { V_ROOT, 0 }, /* a - 0 */
+ { V_SWAP, V_UNMNT }, /* b - 1 */
+ { V_BACKUP, V_UNMNT }, /* c - 2 */
+ { V_UNASSIGNED, 0 }, /* d - 3 */
+ { V_UNASSIGNED, 0 }, /* e - 4 */
+ { V_UNASSIGNED, 0 }, /* f - 5 */
+ { V_USR, 0 }, /* g - 6 */
+ { V_UNASSIGNED, 0 }, /* h - 7 */
+
+#if defined(_SUNOS_VTOC_16)
+
+#if defined(i386) || defined(__amd64) || defined(__arm) || \
+ defined(__powerpc) || defined(__sparc) || defined(__s390__) || \
+ defined(__mips__) || defined(__rv64g__)
+ { V_BOOT, V_UNMNT }, /* i - 8 */
+ { V_ALTSCTR, 0 }, /* j - 9 */
+
+#else
+#error No VTOC format defined.
+#endif /* defined(i386) */
+
+ { V_UNASSIGNED, 0 }, /* k - 10 */
+ { V_UNASSIGNED, 0 }, /* l - 11 */
+ { V_UNASSIGNED, 0 }, /* m - 12 */
+ { V_UNASSIGNED, 0 }, /* n - 13 */
+ { V_UNASSIGNED, 0 }, /* o - 14 */
+ { V_UNASSIGNED, 0 }, /* p - 15 */
+#endif /* defined(_SUNOS_VTOC_16) */
+};
+
+int efi_debug = 0;
+
+static int efi_read(int, struct dk_gpt *);
+
+/*
+ * Return a 32-bit CRC of the contents of the buffer. Pre-and-post
+ * one's conditioning will be handled by crc32() internally.
+ */
+static uint32_t
+efi_crc32(const unsigned char *buf, unsigned int size)
+{
+ uint32_t crc = crc32(0, Z_NULL, 0);
+
+ crc = crc32(crc, buf, size);
+
+ return (crc);
+}
+
+static int
+read_disk_info(int fd, diskaddr_t *capacity, uint_t *lbsize)
+{
+ int sector_size;
+ unsigned long long capacity_size;
+
+ if (ioctl(fd, BLKSSZGET, &sector_size) < 0)
+ return (-1);
+
+ if (ioctl(fd, BLKGETSIZE64, &capacity_size) < 0)
+ return (-1);
+
+ *lbsize = (uint_t)sector_size;
+ *capacity = (diskaddr_t)(capacity_size / sector_size);
+
+ return (0);
+}
+
+static int
+efi_get_info(int fd, struct dk_cinfo *dki_info)
+{
+ char *path;
+ char *dev_path;
+ int rval = 0;
+
+ memset(dki_info, 0, sizeof (*dki_info));
+
+ path = calloc(1, PATH_MAX);
+ if (path == NULL)
+ goto error;
+
+ /*
+ * The simplest way to get the partition number under linux is
+ * to parse it out of the /dev/<disk><partition> block device name.
+ * The kernel creates this using the partition number when it
+ * populates /dev/ so it may be trusted. The tricky bit here is
+ * that the naming convention is based on the block device type.
+ * So we need to take this in to account when parsing out the
+ * partition information. Another issue is that the libefi API
+ * API only provides the open fd and not the file path. To handle
+ * this realpath(3) is used to resolve the block device name from
+ * /proc/self/fd/<fd>. Aside from the partition number we collect
+ * some additional device info.
+ */
+ (void) sprintf(path, "/proc/self/fd/%d", fd);
+ dev_path = realpath(path, NULL);
+ free(path);
+
+ if (dev_path == NULL)
+ goto error;
+
+ if ((strncmp(dev_path, "/dev/sd", 7) == 0)) {
+ strcpy(dki_info->dki_cname, "sd");
+ dki_info->dki_ctype = DKC_SCSI_CCS;
+ rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu",
+ dki_info->dki_dname,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/hd", 7) == 0)) {
+ strcpy(dki_info->dki_cname, "hd");
+ dki_info->dki_ctype = DKC_DIRECT;
+ rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu",
+ dki_info->dki_dname,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/md", 7) == 0)) {
+ strcpy(dki_info->dki_cname, "pseudo");
+ dki_info->dki_ctype = DKC_MD;
+ strcpy(dki_info->dki_dname, "md");
+ rval = sscanf(dev_path, "/dev/md%[0-9]p%hu",
+ dki_info->dki_dname + 2,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/vd", 7) == 0)) {
+ strcpy(dki_info->dki_cname, "vd");
+ dki_info->dki_ctype = DKC_MD;
+ rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu",
+ dki_info->dki_dname,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/xvd", 8) == 0)) {
+ strcpy(dki_info->dki_cname, "xvd");
+ dki_info->dki_ctype = DKC_MD;
+ rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu",
+ dki_info->dki_dname,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/zd", 7) == 0)) {
+ strcpy(dki_info->dki_cname, "zd");
+ dki_info->dki_ctype = DKC_MD;
+ strcpy(dki_info->dki_dname, "zd");
+ rval = sscanf(dev_path, "/dev/zd%[0-9]p%hu",
+ dki_info->dki_dname + 2,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/dm-", 8) == 0)) {
+ strcpy(dki_info->dki_cname, "pseudo");
+ dki_info->dki_ctype = DKC_VBD;
+ strcpy(dki_info->dki_dname, "dm-");
+ rval = sscanf(dev_path, "/dev/dm-%[0-9]p%hu",
+ dki_info->dki_dname + 3,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/ram", 8) == 0)) {
+ strcpy(dki_info->dki_cname, "pseudo");
+ dki_info->dki_ctype = DKC_PCMCIA_MEM;
+ strcpy(dki_info->dki_dname, "ram");
+ rval = sscanf(dev_path, "/dev/ram%[0-9]p%hu",
+ dki_info->dki_dname + 3,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/loop", 9) == 0)) {
+ strcpy(dki_info->dki_cname, "pseudo");
+ dki_info->dki_ctype = DKC_VBD;
+ strcpy(dki_info->dki_dname, "loop");
+ rval = sscanf(dev_path, "/dev/loop%[0-9]p%hu",
+ dki_info->dki_dname + 4,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/nvme", 9) == 0)) {
+ strcpy(dki_info->dki_cname, "nvme");
+ dki_info->dki_ctype = DKC_SCSI_CCS;
+ strcpy(dki_info->dki_dname, "nvme");
+ (void) sscanf(dev_path, "/dev/nvme%[0-9]",
+ dki_info->dki_dname + 4);
+ size_t controller_length = strlen(
+ dki_info->dki_dname);
+ strcpy(dki_info->dki_dname + controller_length,
+ "n");
+ rval = sscanf(dev_path,
+ "/dev/nvme%*[0-9]n%[0-9]p%hu",
+ dki_info->dki_dname + controller_length + 1,
+ &dki_info->dki_partition);
+ } else {
+ strcpy(dki_info->dki_dname, "unknown");
+ strcpy(dki_info->dki_cname, "unknown");
+ dki_info->dki_ctype = DKC_UNKNOWN;
+ }
+
+ switch (rval) {
+ case 0:
+ errno = EINVAL;
+ goto error;
+ case 1:
+ dki_info->dki_partition = 0;
+ }
+
+ free(dev_path);
+
+ return (0);
+error:
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCINFO errno 0x%x\n", errno);
+
+ switch (errno) {
+ case EIO:
+ return (VT_EIO);
+ case EINVAL:
+ return (VT_EINVAL);
+ default:
+ return (VT_ERROR);
+ }
+}
+
+/*
+ * the number of blocks the EFI label takes up (round up to nearest
+ * block)
+ */
+#define NBLOCKS(p, l) (1 + ((((p) * (int)sizeof (efi_gpe_t)) + \
+ ((l) - 1)) / (l)))
+/* number of partitions -- limited by what we can malloc */
+#define MAX_PARTS ((4294967295UL - sizeof (struct dk_gpt)) / \
+ sizeof (struct dk_part))
+
+int
+efi_alloc_and_init(int fd, uint32_t nparts, struct dk_gpt **vtoc)
+{
+ diskaddr_t capacity = 0;
+ uint_t lbsize = 0;
+ uint_t nblocks;
+ size_t length;
+ struct dk_gpt *vptr;
+ struct uuid uuid;
+ struct dk_cinfo dki_info;
+
+ if (read_disk_info(fd, &capacity, &lbsize) != 0)
+ return (-1);
+
+ if (efi_get_info(fd, &dki_info) != 0)
+ return (-1);
+
+ if (dki_info.dki_partition != 0)
+ return (-1);
+
+ if ((dki_info.dki_ctype == DKC_PCMCIA_MEM) ||
+ (dki_info.dki_ctype == DKC_VBD) ||
+ (dki_info.dki_ctype == DKC_UNKNOWN))
+ return (-1);
+
+ nblocks = NBLOCKS(nparts, lbsize);
+ if ((nblocks * lbsize) < EFI_MIN_ARRAY_SIZE + lbsize) {
+ /* 16K plus one block for the GPT */
+ nblocks = EFI_MIN_ARRAY_SIZE / lbsize + 1;
+ }
+
+ if (nparts > MAX_PARTS) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "the maximum number of partitions supported is %lu\n",
+ MAX_PARTS);
+ }
+ return (-1);
+ }
+
+ length = sizeof (struct dk_gpt) +
+ sizeof (struct dk_part) * (nparts - 1);
+
+ vptr = calloc(1, length);
+ if (vptr == NULL)
+ return (-1);
+
+ *vtoc = vptr;
+
+ vptr->efi_version = EFI_VERSION_CURRENT;
+ vptr->efi_lbasize = lbsize;
+ vptr->efi_nparts = nparts;
+ /*
+ * add one block here for the PMBR; on disks with a 512 byte
+ * block size and 128 or fewer partitions, efi_first_u_lba
+ * should work out to "34"
+ */
+ vptr->efi_first_u_lba = nblocks + 1;
+ vptr->efi_last_lba = capacity - 1;
+ vptr->efi_altern_lba = capacity -1;
+ vptr->efi_last_u_lba = vptr->efi_last_lba - nblocks;
+
+ (void) uuid_generate((uchar_t *)&uuid);
+ UUID_LE_CONVERT(vptr->efi_disk_uguid, uuid);
+ return (0);
+}
+
+/*
+ * Read EFI - return partition number upon success.
+ */
+int
+efi_alloc_and_read(int fd, struct dk_gpt **vtoc)
+{
+ int rval;
+ uint32_t nparts;
+ int length;
+ struct dk_gpt *vptr;
+
+ /* figure out the number of entries that would fit into 16K */
+ nparts = EFI_MIN_ARRAY_SIZE / sizeof (efi_gpe_t);
+ length = (int) sizeof (struct dk_gpt) +
+ (int) sizeof (struct dk_part) * (nparts - 1);
+ vptr = calloc(1, length);
+
+ if (vptr == NULL)
+ return (VT_ERROR);
+
+ vptr->efi_nparts = nparts;
+ rval = efi_read(fd, vptr);
+
+ if ((rval == VT_EINVAL) && vptr->efi_nparts > nparts) {
+ void *tmp;
+ length = (int) sizeof (struct dk_gpt) +
+ (int) sizeof (struct dk_part) * (vptr->efi_nparts - 1);
+ nparts = vptr->efi_nparts;
+ if ((tmp = realloc(vptr, length)) == NULL) {
+ free(vptr);
+ *vtoc = NULL;
+ return (VT_ERROR);
+ } else {
+ vptr = tmp;
+ rval = efi_read(fd, vptr);
+ }
+ }
+
+ if (rval < 0) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "read of EFI table failed, rval=%d\n", rval);
+ }
+ free(vptr);
+ *vtoc = NULL;
+ } else {
+ *vtoc = vptr;
+ }
+
+ return (rval);
+}
+
+static int
+efi_ioctl(int fd, int cmd, dk_efi_t *dk_ioc)
+{
+ void *data = dk_ioc->dki_data;
+ int error;
+ diskaddr_t capacity;
+ uint_t lbsize;
+
+ /*
+ * When the IO is not being performed in kernel as an ioctl we need
+ * to know the sector size so we can seek to the proper byte offset.
+ */
+ if (read_disk_info(fd, &capacity, &lbsize) == -1) {
+ if (efi_debug)
+ fprintf(stderr, "unable to read disk info: %d", errno);
+
+ errno = EIO;
+ return (-1);
+ }
+
+ switch (cmd) {
+ case DKIOCGETEFI:
+ if (lbsize == 0) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCGETEFI assuming "
+ "LBA %d bytes\n", DEV_BSIZE);
+
+ lbsize = DEV_BSIZE;
+ }
+
+ error = lseek(fd, dk_ioc->dki_lba * lbsize, SEEK_SET);
+ if (error == -1) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCGETEFI lseek "
+ "error: %d\n", errno);
+ return (error);
+ }
+
+ error = read(fd, data, dk_ioc->dki_length);
+ if (error == -1) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCGETEFI read "
+ "error: %d\n", errno);
+ return (error);
+ }
+
+ if (error != dk_ioc->dki_length) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCGETEFI short "
+ "read of %d bytes\n", error);
+ errno = EIO;
+ return (-1);
+ }
+ error = 0;
+ break;
+
+ case DKIOCSETEFI:
+ if (lbsize == 0) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCSETEFI unknown "
+ "LBA size\n");
+ errno = EIO;
+ return (-1);
+ }
+
+ error = lseek(fd, dk_ioc->dki_lba * lbsize, SEEK_SET);
+ if (error == -1) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCSETEFI lseek "
+ "error: %d\n", errno);
+ return (error);
+ }
+
+ error = write(fd, data, dk_ioc->dki_length);
+ if (error == -1) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCSETEFI write "
+ "error: %d\n", errno);
+ return (error);
+ }
+
+ if (error != dk_ioc->dki_length) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCSETEFI short "
+ "write of %d bytes\n", error);
+ errno = EIO;
+ return (-1);
+ }
+
+ /* Sync the new EFI table to disk */
+ error = fsync(fd);
+ if (error == -1)
+ return (error);
+
+ /* Ensure any local disk cache is also flushed */
+ if (ioctl(fd, BLKFLSBUF, 0) == -1)
+ return (error);
+
+ error = 0;
+ break;
+
+ default:
+ if (efi_debug)
+ (void) fprintf(stderr, "unsupported ioctl()\n");
+
+ errno = EIO;
+ return (-1);
+ }
+
+ return (error);
+}
+
+int
+efi_rescan(int fd)
+{
+ int retry = 10;
+ int error;
+
+ /* Notify the kernel a devices partition table has been updated */
+ while ((error = ioctl(fd, BLKRRPART)) != 0) {
+ if ((--retry == 0) || (errno != EBUSY)) {
+ (void) fprintf(stderr, "the kernel failed to rescan "
+ "the partition table: %d\n", errno);
+ return (-1);
+ }
+ usleep(50000);
+ }
+
+ return (0);
+}
+
+static int
+check_label(int fd, dk_efi_t *dk_ioc)
+{
+ efi_gpt_t *efi;
+ uint_t crc;
+
+ if (efi_ioctl(fd, DKIOCGETEFI, dk_ioc) == -1) {
+ switch (errno) {
+ case EIO:
+ return (VT_EIO);
+ default:
+ return (VT_ERROR);
+ }
+ }
+ efi = dk_ioc->dki_data;
+ if (efi->efi_gpt_Signature != LE_64(EFI_SIGNATURE)) {
+ if (efi_debug)
+ (void) fprintf(stderr,
+ "Bad EFI signature: 0x%llx != 0x%llx\n",
+ (long long)efi->efi_gpt_Signature,
+ (long long)LE_64(EFI_SIGNATURE));
+ return (VT_EINVAL);
+ }
+
+ /*
+ * check CRC of the header; the size of the header should
+ * never be larger than one block
+ */
+ crc = efi->efi_gpt_HeaderCRC32;
+ efi->efi_gpt_HeaderCRC32 = 0;
+ len_t headerSize = (len_t)LE_32(efi->efi_gpt_HeaderSize);
+
+ if (headerSize < EFI_MIN_LABEL_SIZE || headerSize > EFI_LABEL_SIZE) {
+ if (efi_debug)
+ (void) fprintf(stderr,
+ "Invalid EFI HeaderSize %llu. Assuming %d.\n",
+ headerSize, EFI_MIN_LABEL_SIZE);
+ }
+
+ if ((headerSize > dk_ioc->dki_length) ||
+ crc != LE_32(efi_crc32((unsigned char *)efi, headerSize))) {
+ if (efi_debug)
+ (void) fprintf(stderr,
+ "Bad EFI CRC: 0x%x != 0x%x\n",
+ crc, LE_32(efi_crc32((unsigned char *)efi,
+ headerSize)));
+ return (VT_EINVAL);
+ }
+
+ return (0);
+}
+
+static int
+efi_read(int fd, struct dk_gpt *vtoc)
+{
+ int i, j;
+ int label_len;
+ int rval = 0;
+ int md_flag = 0;
+ int vdc_flag = 0;
+ diskaddr_t capacity = 0;
+ uint_t lbsize = 0;
+ struct dk_minfo disk_info;
+ dk_efi_t dk_ioc;
+ efi_gpt_t *efi;
+ efi_gpe_t *efi_parts;
+ struct dk_cinfo dki_info;
+ uint32_t user_length;
+ boolean_t legacy_label = B_FALSE;
+
+ /*
+ * get the partition number for this file descriptor.
+ */
+ if ((rval = efi_get_info(fd, &dki_info)) != 0)
+ return (rval);
+
+ if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) &&
+ (strncmp(dki_info.dki_dname, "md", 3) == 0)) {
+ md_flag++;
+ } else if ((strncmp(dki_info.dki_cname, "vdc", 4) == 0) &&
+ (strncmp(dki_info.dki_dname, "vdc", 4) == 0)) {
+ /*
+ * The controller and drive name "vdc" (virtual disk client)
+ * indicates a LDoms virtual disk.
+ */
+ vdc_flag++;
+ }
+
+ /* get the LBA size */
+ if (read_disk_info(fd, &capacity, &lbsize) == -1) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "unable to read disk info: %d",
+ errno);
+ }
+ return (VT_EINVAL);
+ }
+
+ disk_info.dki_lbsize = lbsize;
+ disk_info.dki_capacity = capacity;
+
+ if (disk_info.dki_lbsize == 0) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "efi_read: assuming LBA 512 bytes\n");
+ }
+ disk_info.dki_lbsize = DEV_BSIZE;
+ }
+ /*
+ * Read the EFI GPT to figure out how many partitions we need
+ * to deal with.
+ */
+ dk_ioc.dki_lba = 1;
+ if (NBLOCKS(vtoc->efi_nparts, disk_info.dki_lbsize) < 34) {
+ label_len = EFI_MIN_ARRAY_SIZE + disk_info.dki_lbsize;
+ } else {
+ label_len = vtoc->efi_nparts * (int) sizeof (efi_gpe_t) +
+ disk_info.dki_lbsize;
+ if (label_len % disk_info.dki_lbsize) {
+ /* pad to physical sector size */
+ label_len += disk_info.dki_lbsize;
+ label_len &= ~(disk_info.dki_lbsize - 1);
+ }
+ }
+
+ if (posix_memalign((void **)&dk_ioc.dki_data,
+ disk_info.dki_lbsize, label_len))
+ return (VT_ERROR);
+
+ memset(dk_ioc.dki_data, 0, label_len);
+ dk_ioc.dki_length = disk_info.dki_lbsize;
+ user_length = vtoc->efi_nparts;
+ efi = dk_ioc.dki_data;
+ if (md_flag) {
+ dk_ioc.dki_length = label_len;
+ if (efi_ioctl(fd, DKIOCGETEFI, &dk_ioc) == -1) {
+ switch (errno) {
+ case EIO:
+ return (VT_EIO);
+ default:
+ return (VT_ERROR);
+ }
+ }
+ } else if ((rval = check_label(fd, &dk_ioc)) == VT_EINVAL) {
+ /*
+ * No valid label here; try the alternate. Note that here
+ * we just read GPT header and save it into dk_ioc.data,
+ * Later, we will read GUID partition entry array if we
+ * can get valid GPT header.
+ */
+
+ /*
+ * This is a workaround for legacy systems. In the past, the
+ * last sector of SCSI disk was invisible on x86 platform. At
+ * that time, backup label was saved on the next to the last
+ * sector. It is possible for users to move a disk from previous
+ * solaris system to present system. Here, we attempt to search
+ * legacy backup EFI label first.
+ */
+ dk_ioc.dki_lba = disk_info.dki_capacity - 2;
+ dk_ioc.dki_length = disk_info.dki_lbsize;
+ rval = check_label(fd, &dk_ioc);
+ if (rval == VT_EINVAL) {
+ /*
+ * we didn't find legacy backup EFI label, try to
+ * search backup EFI label in the last block.
+ */
+ dk_ioc.dki_lba = disk_info.dki_capacity - 1;
+ dk_ioc.dki_length = disk_info.dki_lbsize;
+ rval = check_label(fd, &dk_ioc);
+ if (rval == 0) {
+ legacy_label = B_TRUE;
+ if (efi_debug)
+ (void) fprintf(stderr,
+ "efi_read: primary label corrupt; "
+ "using EFI backup label located on"
+ " the last block\n");
+ }
+ } else {
+ if ((efi_debug) && (rval == 0))
+ (void) fprintf(stderr, "efi_read: primary label"
+ " corrupt; using legacy EFI backup label "
+ " located on the next to last block\n");
+ }
+
+ if (rval == 0) {
+ dk_ioc.dki_lba = LE_64(efi->efi_gpt_PartitionEntryLBA);
+ vtoc->efi_flags |= EFI_GPT_PRIMARY_CORRUPT;
+ vtoc->efi_nparts =
+ LE_32(efi->efi_gpt_NumberOfPartitionEntries);
+ /*
+ * Partition tables are between backup GPT header
+ * table and ParitionEntryLBA (the starting LBA of
+ * the GUID partition entries array). Now that we
+ * already got valid GPT header and saved it in
+ * dk_ioc.dki_data, we try to get GUID partition
+ * entry array here.
+ */
+ /* LINTED */
+ dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data
+ + disk_info.dki_lbsize);
+ if (legacy_label)
+ dk_ioc.dki_length = disk_info.dki_capacity - 1 -
+ dk_ioc.dki_lba;
+ else
+ dk_ioc.dki_length = disk_info.dki_capacity - 2 -
+ dk_ioc.dki_lba;
+ dk_ioc.dki_length *= disk_info.dki_lbsize;
+ if (dk_ioc.dki_length >
+ ((len_t)label_len - sizeof (*dk_ioc.dki_data))) {
+ rval = VT_EINVAL;
+ } else {
+ /*
+ * read GUID partition entry array
+ */
+ rval = efi_ioctl(fd, DKIOCGETEFI, &dk_ioc);
+ }
+ }
+
+ } else if (rval == 0) {
+
+ dk_ioc.dki_lba = LE_64(efi->efi_gpt_PartitionEntryLBA);
+ /* LINTED */
+ dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data
+ + disk_info.dki_lbsize);
+ dk_ioc.dki_length = label_len - disk_info.dki_lbsize;
+ rval = efi_ioctl(fd, DKIOCGETEFI, &dk_ioc);
+
+ } else if (vdc_flag && rval == VT_ERROR && errno == EINVAL) {
+ /*
+ * When the device is a LDoms virtual disk, the DKIOCGETEFI
+ * ioctl can fail with EINVAL if the virtual disk backend
+ * is a ZFS volume serviced by a domain running an old version
+ * of Solaris. This is because the DKIOCGETEFI ioctl was
+ * initially incorrectly implemented for a ZFS volume and it
+ * expected the GPT and GPE to be retrieved with a single ioctl.
+ * So we try to read the GPT and the GPE using that old style
+ * ioctl.
+ */
+ dk_ioc.dki_lba = 1;
+ dk_ioc.dki_length = label_len;
+ rval = check_label(fd, &dk_ioc);
+ }
+
+ if (rval < 0) {
+ free(efi);
+ return (rval);
+ }
+
+ /* LINTED -- always longlong aligned */
+ efi_parts = (efi_gpe_t *)(((char *)efi) + disk_info.dki_lbsize);
+
+ /*
+ * Assemble this into a "dk_gpt" struct for easier
+ * digestibility by applications.
+ */
+ vtoc->efi_version = LE_32(efi->efi_gpt_Revision);
+ vtoc->efi_nparts = LE_32(efi->efi_gpt_NumberOfPartitionEntries);
+ vtoc->efi_part_size = LE_32(efi->efi_gpt_SizeOfPartitionEntry);
+ vtoc->efi_lbasize = disk_info.dki_lbsize;
+ vtoc->efi_last_lba = disk_info.dki_capacity - 1;
+ vtoc->efi_first_u_lba = LE_64(efi->efi_gpt_FirstUsableLBA);
+ vtoc->efi_last_u_lba = LE_64(efi->efi_gpt_LastUsableLBA);
+ vtoc->efi_altern_lba = LE_64(efi->efi_gpt_AlternateLBA);
+ UUID_LE_CONVERT(vtoc->efi_disk_uguid, efi->efi_gpt_DiskGUID);
+
+ /*
+ * If the array the user passed in is too small, set the length
+ * to what it needs to be and return
+ */
+ if (user_length < vtoc->efi_nparts) {
+ return (VT_EINVAL);
+ }
+
+ for (i = 0; i < vtoc->efi_nparts; i++) {
+
+ UUID_LE_CONVERT(vtoc->efi_parts[i].p_guid,
+ efi_parts[i].efi_gpe_PartitionTypeGUID);
+
+ for (j = 0;
+ j < sizeof (conversion_array)
+ / sizeof (struct uuid_to_ptag); j++) {
+
+ if (bcmp(&vtoc->efi_parts[i].p_guid,
+ &conversion_array[j].uuid,
+ sizeof (struct uuid)) == 0) {
+ vtoc->efi_parts[i].p_tag = j;
+ break;
+ }
+ }
+ if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED)
+ continue;
+ vtoc->efi_parts[i].p_flag =
+ LE_16(efi_parts[i].efi_gpe_Attributes.PartitionAttrs);
+ vtoc->efi_parts[i].p_start =
+ LE_64(efi_parts[i].efi_gpe_StartingLBA);
+ vtoc->efi_parts[i].p_size =
+ LE_64(efi_parts[i].efi_gpe_EndingLBA) -
+ vtoc->efi_parts[i].p_start + 1;
+ for (j = 0; j < EFI_PART_NAME_LEN; j++) {
+ vtoc->efi_parts[i].p_name[j] =
+ (uchar_t)LE_16(
+ efi_parts[i].efi_gpe_PartitionName[j]);
+ }
+
+ UUID_LE_CONVERT(vtoc->efi_parts[i].p_uguid,
+ efi_parts[i].efi_gpe_UniquePartitionGUID);
+ }
+ free(efi);
+
+ return (dki_info.dki_partition);
+}
+
+/* writes a "protective" MBR */
+static int
+write_pmbr(int fd, struct dk_gpt *vtoc)
+{
+ dk_efi_t dk_ioc;
+ struct mboot mb;
+ uchar_t *cp;
+ diskaddr_t size_in_lba;
+ uchar_t *buf;
+ int len;
+
+ len = (vtoc->efi_lbasize == 0) ? sizeof (mb) : vtoc->efi_lbasize;
+ if (posix_memalign((void **)&buf, len, len))
+ return (VT_ERROR);
+
+ /*
+ * Preserve any boot code and disk signature if the first block is
+ * already an MBR.
+ */
+ memset(buf, 0, len);
+ dk_ioc.dki_lba = 0;
+ dk_ioc.dki_length = len;
+ /* LINTED -- always longlong aligned */
+ dk_ioc.dki_data = (efi_gpt_t *)buf;
+ if (efi_ioctl(fd, DKIOCGETEFI, &dk_ioc) == -1) {
+ (void) memcpy(&mb, buf, sizeof (mb));
+ bzero(&mb, sizeof (mb));
+ mb.signature = LE_16(MBB_MAGIC);
+ } else {
+ (void) memcpy(&mb, buf, sizeof (mb));
+ if (mb.signature != LE_16(MBB_MAGIC)) {
+ bzero(&mb, sizeof (mb));
+ mb.signature = LE_16(MBB_MAGIC);
+ }
+ }
+
+ bzero(&mb.parts, sizeof (mb.parts));
+ cp = (uchar_t *)&mb.parts[0];
+ /* bootable or not */
+ *cp++ = 0;
+ /* beginning CHS; 0xffffff if not representable */
+ *cp++ = 0xff;
+ *cp++ = 0xff;
+ *cp++ = 0xff;
+ /* OS type */
+ *cp++ = EFI_PMBR;
+ /* ending CHS; 0xffffff if not representable */
+ *cp++ = 0xff;
+ *cp++ = 0xff;
+ *cp++ = 0xff;
+ /* starting LBA: 1 (little endian format) by EFI definition */
+ *cp++ = 0x01;
+ *cp++ = 0x00;
+ *cp++ = 0x00;
+ *cp++ = 0x00;
+ /* ending LBA: last block on the disk (little endian format) */
+ size_in_lba = vtoc->efi_last_lba;
+ if (size_in_lba < 0xffffffff) {
+ *cp++ = (size_in_lba & 0x000000ff);
+ *cp++ = (size_in_lba & 0x0000ff00) >> 8;
+ *cp++ = (size_in_lba & 0x00ff0000) >> 16;
+ *cp++ = (size_in_lba & 0xff000000) >> 24;
+ } else {
+ *cp++ = 0xff;
+ *cp++ = 0xff;
+ *cp++ = 0xff;
+ *cp++ = 0xff;
+ }
+
+ (void) memcpy(buf, &mb, sizeof (mb));
+ /* LINTED -- always longlong aligned */
+ dk_ioc.dki_data = (efi_gpt_t *)buf;
+ dk_ioc.dki_lba = 0;
+ dk_ioc.dki_length = len;
+ if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
+ free(buf);
+ switch (errno) {
+ case EIO:
+ return (VT_EIO);
+ case EINVAL:
+ return (VT_EINVAL);
+ default:
+ return (VT_ERROR);
+ }
+ }
+ free(buf);
+ return (0);
+}
+
+/* make sure the user specified something reasonable */
+static int
+check_input(struct dk_gpt *vtoc)
+{
+ int resv_part = -1;
+ int i, j;
+ diskaddr_t istart, jstart, isize, jsize, endsect;
+
+ /*
+ * Sanity-check the input (make sure no partitions overlap)
+ */
+ for (i = 0; i < vtoc->efi_nparts; i++) {
+ /* It can't be unassigned and have an actual size */
+ if ((vtoc->efi_parts[i].p_tag == V_UNASSIGNED) &&
+ (vtoc->efi_parts[i].p_size != 0)) {
+ if (efi_debug) {
+ (void) fprintf(stderr, "partition %d is "
+ "\"unassigned\" but has a size of %llu",
+ i, vtoc->efi_parts[i].p_size);
+ }
+ return (VT_EINVAL);
+ }
+ if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) {
+ if (uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_guid))
+ continue;
+ /* we have encountered an unknown uuid */
+ vtoc->efi_parts[i].p_tag = 0xff;
+ }
+ if (vtoc->efi_parts[i].p_tag == V_RESERVED) {
+ if (resv_part != -1) {
+ if (efi_debug) {
+ (void) fprintf(stderr, "found "
+ "duplicate reserved partition "
+ "at %d\n", i);
+ }
+ return (VT_EINVAL);
+ }
+ resv_part = i;
+ }
+ if ((vtoc->efi_parts[i].p_start < vtoc->efi_first_u_lba) ||
+ (vtoc->efi_parts[i].p_start > vtoc->efi_last_u_lba)) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "Partition %d starts at %llu. ",
+ i,
+ vtoc->efi_parts[i].p_start);
+ (void) fprintf(stderr,
+ "It must be between %llu and %llu.\n",
+ vtoc->efi_first_u_lba,
+ vtoc->efi_last_u_lba);
+ }
+ return (VT_EINVAL);
+ }
+ if ((vtoc->efi_parts[i].p_start +
+ vtoc->efi_parts[i].p_size <
+ vtoc->efi_first_u_lba) ||
+ (vtoc->efi_parts[i].p_start +
+ vtoc->efi_parts[i].p_size >
+ vtoc->efi_last_u_lba + 1)) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "Partition %d ends at %llu. ",
+ i,
+ vtoc->efi_parts[i].p_start +
+ vtoc->efi_parts[i].p_size);
+ (void) fprintf(stderr,
+ "It must be between %llu and %llu.\n",
+ vtoc->efi_first_u_lba,
+ vtoc->efi_last_u_lba);
+ }
+ return (VT_EINVAL);
+ }
+
+ for (j = 0; j < vtoc->efi_nparts; j++) {
+ isize = vtoc->efi_parts[i].p_size;
+ jsize = vtoc->efi_parts[j].p_size;
+ istart = vtoc->efi_parts[i].p_start;
+ jstart = vtoc->efi_parts[j].p_start;
+ if ((i != j) && (isize != 0) && (jsize != 0)) {
+ endsect = jstart + jsize -1;
+ if ((jstart <= istart) &&
+ (istart <= endsect)) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "Partition %d overlaps "
+ "partition %d.", i, j);
+ }
+ return (VT_EINVAL);
+ }
+ }
+ }
+ }
+ /* just a warning for now */
+ if ((resv_part == -1) && efi_debug) {
+ (void) fprintf(stderr,
+ "no reserved partition found\n");
+ }
+ return (0);
+}
+
+/*
+ * add all the unallocated space to the current label
+ */
+int
+efi_use_whole_disk(int fd)
+{
+ struct dk_gpt *efi_label = NULL;
+ int rval;
+ int i;
+ uint_t resv_index = 0, data_index = 0;
+ diskaddr_t resv_start = 0, data_start = 0;
+ diskaddr_t data_size, limit, difference;
+ boolean_t sync_needed = B_FALSE;
+ uint_t nblocks;
+
+ rval = efi_alloc_and_read(fd, &efi_label);
+ if (rval < 0) {
+ if (efi_label != NULL)
+ efi_free(efi_label);
+ return (rval);
+ }
+
+ /*
+ * Find the last physically non-zero partition.
+ * This should be the reserved partition.
+ */
+ for (i = 0; i < efi_label->efi_nparts; i ++) {
+ if (resv_start < efi_label->efi_parts[i].p_start) {
+ resv_start = efi_label->efi_parts[i].p_start;
+ resv_index = i;
+ }
+ }
+
+ /*
+ * Find the last physically non-zero partition before that.
+ * This is the data partition.
+ */
+ for (i = 0; i < resv_index; i ++) {
+ if (data_start < efi_label->efi_parts[i].p_start) {
+ data_start = efi_label->efi_parts[i].p_start;
+ data_index = i;
+ }
+ }
+ data_size = efi_label->efi_parts[data_index].p_size;
+
+ /*
+ * See the "efi_alloc_and_init" function for more information
+ * about where this "nblocks" value comes from.
+ */
+ nblocks = efi_label->efi_first_u_lba - 1;
+
+ /*
+ * Determine if the EFI label is out of sync. We check that:
+ *
+ * 1. the data partition ends at the limit we set, and
+ * 2. the reserved partition starts at the limit we set.
+ *
+ * If either of these conditions is not met, then we need to
+ * resync the EFI label.
+ *
+ * The limit is the last usable LBA, determined by the last LBA
+ * and the first usable LBA fields on the EFI label of the disk
+ * (see the lines directly above). Additionally, we factor in
+ * EFI_MIN_RESV_SIZE (per its use in "zpool_label_disk") and
+ * P2ALIGN it to ensure the partition boundaries are aligned
+ * (for performance reasons). The alignment should match the
+ * alignment used by the "zpool_label_disk" function.
+ */
+ limit = P2ALIGN(efi_label->efi_last_lba - nblocks - EFI_MIN_RESV_SIZE,
+ PARTITION_END_ALIGNMENT);
+ if (data_start + data_size != limit || resv_start != limit)
+ sync_needed = B_TRUE;
+
+ if (efi_debug && sync_needed)
+ (void) fprintf(stderr, "efi_use_whole_disk: sync needed\n");
+
+ /*
+ * If alter_lba is 1, we are using the backup label.
+ * Since we can locate the backup label by disk capacity,
+ * there must be no unallocated space.
+ */
+ if ((efi_label->efi_altern_lba == 1) || (efi_label->efi_altern_lba
+ >= efi_label->efi_last_lba && !sync_needed)) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "efi_use_whole_disk: requested space not found\n");
+ }
+ efi_free(efi_label);
+ return (VT_ENOSPC);
+ }
+
+ /*
+ * Verify that we've found the reserved partition by checking
+ * that it looks the way it did when we created it in zpool_label_disk.
+ * If we've found the incorrect partition, then we know that this
+ * device was reformatted and no longer is solely used by ZFS.
+ */
+ if ((efi_label->efi_parts[resv_index].p_size != EFI_MIN_RESV_SIZE) ||
+ (efi_label->efi_parts[resv_index].p_tag != V_RESERVED) ||
+ (resv_index != 8)) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "efi_use_whole_disk: wholedisk not available\n");
+ }
+ efi_free(efi_label);
+ return (VT_ENOSPC);
+ }
+
+ if (data_start + data_size != resv_start) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "efi_use_whole_disk: "
+ "data_start (%lli) + "
+ "data_size (%lli) != "
+ "resv_start (%lli)\n",
+ data_start, data_size, resv_start);
+ }
+
+ return (VT_EINVAL);
+ }
+
+ if (limit < resv_start) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "efi_use_whole_disk: "
+ "limit (%lli) < resv_start (%lli)\n",
+ limit, resv_start);
+ }
+
+ return (VT_EINVAL);
+ }
+
+ difference = limit - resv_start;
+
+ if (efi_debug)
+ (void) fprintf(stderr,
+ "efi_use_whole_disk: difference is %lli\n", difference);
+
+ /*
+ * Move the reserved partition. There is currently no data in
+ * here except fabricated devids (which get generated via
+ * efi_write()). So there is no need to copy data.
+ */
+ efi_label->efi_parts[data_index].p_size += difference;
+ efi_label->efi_parts[resv_index].p_start += difference;
+ efi_label->efi_last_u_lba = efi_label->efi_last_lba - nblocks;
+
+ rval = efi_write(fd, efi_label);
+ if (rval < 0) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "efi_use_whole_disk:fail to write label, rval=%d\n",
+ rval);
+ }
+ efi_free(efi_label);
+ return (rval);
+ }
+
+ efi_free(efi_label);
+ return (0);
+}
+
+/*
+ * write EFI label and backup label
+ */
+int
+efi_write(int fd, struct dk_gpt *vtoc)
+{
+ dk_efi_t dk_ioc;
+ efi_gpt_t *efi;
+ efi_gpe_t *efi_parts;
+ int i, j;
+ struct dk_cinfo dki_info;
+ int rval;
+ int md_flag = 0;
+ int nblocks;
+ diskaddr_t lba_backup_gpt_hdr;
+
+ if ((rval = efi_get_info(fd, &dki_info)) != 0)
+ return (rval);
+
+ /* check if we are dealing with a metadevice */
+ if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) &&
+ (strncmp(dki_info.dki_dname, "md", 3) == 0)) {
+ md_flag = 1;
+ }
+
+ if (check_input(vtoc)) {
+ /*
+ * not valid; if it's a metadevice just pass it down
+ * because SVM will do its own checking
+ */
+ if (md_flag == 0) {
+ return (VT_EINVAL);
+ }
+ }
+
+ dk_ioc.dki_lba = 1;
+ if (NBLOCKS(vtoc->efi_nparts, vtoc->efi_lbasize) < 34) {
+ dk_ioc.dki_length = EFI_MIN_ARRAY_SIZE + vtoc->efi_lbasize;
+ } else {
+ dk_ioc.dki_length = NBLOCKS(vtoc->efi_nparts,
+ vtoc->efi_lbasize) *
+ vtoc->efi_lbasize;
+ }
+
+ /*
+ * the number of blocks occupied by GUID partition entry array
+ */
+ nblocks = dk_ioc.dki_length / vtoc->efi_lbasize - 1;
+
+ /*
+ * Backup GPT header is located on the block after GUID
+ * partition entry array. Here, we calculate the address
+ * for backup GPT header.
+ */
+ lba_backup_gpt_hdr = vtoc->efi_last_u_lba + 1 + nblocks;
+ if (posix_memalign((void **)&dk_ioc.dki_data,
+ vtoc->efi_lbasize, dk_ioc.dki_length))
+ return (VT_ERROR);
+
+ memset(dk_ioc.dki_data, 0, dk_ioc.dki_length);
+ efi = dk_ioc.dki_data;
+
+ /* stuff user's input into EFI struct */
+ efi->efi_gpt_Signature = LE_64(EFI_SIGNATURE);
+ efi->efi_gpt_Revision = LE_32(vtoc->efi_version); /* 0x02000100 */
+ efi->efi_gpt_HeaderSize = LE_32(sizeof (struct efi_gpt) - LEN_EFI_PAD);
+ efi->efi_gpt_Reserved1 = 0;
+ efi->efi_gpt_MyLBA = LE_64(1ULL);
+ efi->efi_gpt_AlternateLBA = LE_64(lba_backup_gpt_hdr);
+ efi->efi_gpt_FirstUsableLBA = LE_64(vtoc->efi_first_u_lba);
+ efi->efi_gpt_LastUsableLBA = LE_64(vtoc->efi_last_u_lba);
+ efi->efi_gpt_PartitionEntryLBA = LE_64(2ULL);
+ efi->efi_gpt_NumberOfPartitionEntries = LE_32(vtoc->efi_nparts);
+ efi->efi_gpt_SizeOfPartitionEntry = LE_32(sizeof (struct efi_gpe));
+ UUID_LE_CONVERT(efi->efi_gpt_DiskGUID, vtoc->efi_disk_uguid);
+
+ /* LINTED -- always longlong aligned */
+ efi_parts = (efi_gpe_t *)((char *)dk_ioc.dki_data + vtoc->efi_lbasize);
+
+ for (i = 0; i < vtoc->efi_nparts; i++) {
+ for (j = 0;
+ j < sizeof (conversion_array) /
+ sizeof (struct uuid_to_ptag); j++) {
+
+ if (vtoc->efi_parts[i].p_tag == j) {
+ UUID_LE_CONVERT(
+ efi_parts[i].efi_gpe_PartitionTypeGUID,
+ conversion_array[j].uuid);
+ break;
+ }
+ }
+
+ if (j == sizeof (conversion_array) /
+ sizeof (struct uuid_to_ptag)) {
+ /*
+ * If we didn't have a matching uuid match, bail here.
+ * Don't write a label with unknown uuid.
+ */
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "Unknown uuid for p_tag %d\n",
+ vtoc->efi_parts[i].p_tag);
+ }
+ return (VT_EINVAL);
+ }
+
+ /* Zero's should be written for empty partitions */
+ if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED)
+ continue;
+
+ efi_parts[i].efi_gpe_StartingLBA =
+ LE_64(vtoc->efi_parts[i].p_start);
+ efi_parts[i].efi_gpe_EndingLBA =
+ LE_64(vtoc->efi_parts[i].p_start +
+ vtoc->efi_parts[i].p_size - 1);
+ efi_parts[i].efi_gpe_Attributes.PartitionAttrs =
+ LE_16(vtoc->efi_parts[i].p_flag);
+ for (j = 0; j < EFI_PART_NAME_LEN; j++) {
+ efi_parts[i].efi_gpe_PartitionName[j] =
+ LE_16((ushort_t)vtoc->efi_parts[i].p_name[j]);
+ }
+ if ((vtoc->efi_parts[i].p_tag != V_UNASSIGNED) &&
+ uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_uguid)) {
+ (void) uuid_generate((uchar_t *)
+ &vtoc->efi_parts[i].p_uguid);
+ }
+ bcopy(&vtoc->efi_parts[i].p_uguid,
+ &efi_parts[i].efi_gpe_UniquePartitionGUID,
+ sizeof (uuid_t));
+ }
+ efi->efi_gpt_PartitionEntryArrayCRC32 =
+ LE_32(efi_crc32((unsigned char *)efi_parts,
+ vtoc->efi_nparts * (int)sizeof (struct efi_gpe)));
+ efi->efi_gpt_HeaderCRC32 =
+ LE_32(efi_crc32((unsigned char *)efi,
+ LE_32(efi->efi_gpt_HeaderSize)));
+
+ if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
+ free(dk_ioc.dki_data);
+ switch (errno) {
+ case EIO:
+ return (VT_EIO);
+ case EINVAL:
+ return (VT_EINVAL);
+ default:
+ return (VT_ERROR);
+ }
+ }
+ /* if it's a metadevice we're done */
+ if (md_flag) {
+ free(dk_ioc.dki_data);
+ return (0);
+ }
+
+ /* write backup partition array */
+ dk_ioc.dki_lba = vtoc->efi_last_u_lba + 1;
+ dk_ioc.dki_length -= vtoc->efi_lbasize;
+ /* LINTED */
+ dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data +
+ vtoc->efi_lbasize);
+
+ if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
+ /*
+ * we wrote the primary label okay, so don't fail
+ */
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "write of backup partitions to block %llu "
+ "failed, errno %d\n",
+ vtoc->efi_last_u_lba + 1,
+ errno);
+ }
+ }
+ /*
+ * now swap MyLBA and AlternateLBA fields and write backup
+ * partition table header
+ */
+ dk_ioc.dki_lba = lba_backup_gpt_hdr;
+ dk_ioc.dki_length = vtoc->efi_lbasize;
+ /* LINTED */
+ dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data -
+ vtoc->efi_lbasize);
+ efi->efi_gpt_AlternateLBA = LE_64(1ULL);
+ efi->efi_gpt_MyLBA = LE_64(lba_backup_gpt_hdr);
+ efi->efi_gpt_PartitionEntryLBA = LE_64(vtoc->efi_last_u_lba + 1);
+ efi->efi_gpt_HeaderCRC32 = 0;
+ efi->efi_gpt_HeaderCRC32 =
+ LE_32(efi_crc32((unsigned char *)dk_ioc.dki_data,
+ LE_32(efi->efi_gpt_HeaderSize)));
+
+ if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
+ if (efi_debug) {
+ (void) fprintf(stderr,
+ "write of backup header to block %llu failed, "
+ "errno %d\n",
+ lba_backup_gpt_hdr,
+ errno);
+ }
+ }
+ /* write the PMBR */
+ (void) write_pmbr(fd, vtoc);
+ free(dk_ioc.dki_data);
+
+ return (0);
+}
+
+void
+efi_free(struct dk_gpt *ptr)
+{
+ free(ptr);
+}
+
+/*
+ * Input: File descriptor
+ * Output: 1 if disk has an EFI label, or > 2TB with no VTOC or legacy MBR.
+ * Otherwise 0.
+ */
+int
+efi_type(int fd)
+{
+#if 0
+ struct vtoc vtoc;
+ struct extvtoc extvtoc;
+
+ if (ioctl(fd, DKIOCGEXTVTOC, &extvtoc) == -1) {
+ if (errno == ENOTSUP)
+ return (1);
+ else if (errno == ENOTTY) {
+ if (ioctl(fd, DKIOCGVTOC, &vtoc) == -1)
+ if (errno == ENOTSUP)
+ return (1);
+ }
+ }
+ return (0);
+#else
+ return (ENOSYS);
+#endif
+}
+
+void
+efi_err_check(struct dk_gpt *vtoc)
+{
+ int resv_part = -1;
+ int i, j;
+ diskaddr_t istart, jstart, isize, jsize, endsect;
+ int overlap = 0;
+
+ /*
+ * make sure no partitions overlap
+ */
+ for (i = 0; i < vtoc->efi_nparts; i++) {
+ /* It can't be unassigned and have an actual size */
+ if ((vtoc->efi_parts[i].p_tag == V_UNASSIGNED) &&
+ (vtoc->efi_parts[i].p_size != 0)) {
+ (void) fprintf(stderr,
+ "partition %d is \"unassigned\" but has a size "
+ "of %llu\n", i, vtoc->efi_parts[i].p_size);
+ }
+ if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) {
+ continue;
+ }
+ if (vtoc->efi_parts[i].p_tag == V_RESERVED) {
+ if (resv_part != -1) {
+ (void) fprintf(stderr,
+ "found duplicate reserved partition at "
+ "%d\n", i);
+ }
+ resv_part = i;
+ if (vtoc->efi_parts[i].p_size != EFI_MIN_RESV_SIZE)
+ (void) fprintf(stderr,
+ "Warning: reserved partition size must "
+ "be %d sectors\n", EFI_MIN_RESV_SIZE);
+ }
+ if ((vtoc->efi_parts[i].p_start < vtoc->efi_first_u_lba) ||
+ (vtoc->efi_parts[i].p_start > vtoc->efi_last_u_lba)) {
+ (void) fprintf(stderr,
+ "Partition %d starts at %llu\n",
+ i,
+ vtoc->efi_parts[i].p_start);
+ (void) fprintf(stderr,
+ "It must be between %llu and %llu.\n",
+ vtoc->efi_first_u_lba,
+ vtoc->efi_last_u_lba);
+ }
+ if ((vtoc->efi_parts[i].p_start +
+ vtoc->efi_parts[i].p_size <
+ vtoc->efi_first_u_lba) ||
+ (vtoc->efi_parts[i].p_start +
+ vtoc->efi_parts[i].p_size >
+ vtoc->efi_last_u_lba + 1)) {
+ (void) fprintf(stderr,
+ "Partition %d ends at %llu\n",
+ i,
+ vtoc->efi_parts[i].p_start +
+ vtoc->efi_parts[i].p_size);
+ (void) fprintf(stderr,
+ "It must be between %llu and %llu.\n",
+ vtoc->efi_first_u_lba,
+ vtoc->efi_last_u_lba);
+ }
+
+ for (j = 0; j < vtoc->efi_nparts; j++) {
+ isize = vtoc->efi_parts[i].p_size;
+ jsize = vtoc->efi_parts[j].p_size;
+ istart = vtoc->efi_parts[i].p_start;
+ jstart = vtoc->efi_parts[j].p_start;
+ if ((i != j) && (isize != 0) && (jsize != 0)) {
+ endsect = jstart + jsize -1;
+ if ((jstart <= istart) &&
+ (istart <= endsect)) {
+ if (!overlap) {
+ (void) fprintf(stderr,
+ "label error: EFI Labels do not "
+ "support overlapping partitions\n");
+ }
+ (void) fprintf(stderr,
+ "Partition %d overlaps partition "
+ "%d.\n", i, j);
+ overlap = 1;
+ }
+ }
+ }
+ }
+ /* make sure there is a reserved partition */
+ if (resv_part == -1) {
+ (void) fprintf(stderr,
+ "no reserved partition found\n");
+ }
+}
+
+/*
+ * We need to get information necessary to construct a *new* efi
+ * label type
+ */
+int
+efi_auto_sense(int fd, struct dk_gpt **vtoc)
+{
+
+ int i;
+
+ /*
+ * Now build the default partition table
+ */
+ if (efi_alloc_and_init(fd, EFI_NUMPAR, vtoc) != 0) {
+ if (efi_debug) {
+ (void) fprintf(stderr, "efi_alloc_and_init failed.\n");
+ }
+ return (-1);
+ }
+
+ for (i = 0; i < MIN((*vtoc)->efi_nparts, V_NUMPAR); i++) {
+ (*vtoc)->efi_parts[i].p_tag = default_vtoc_map[i].p_tag;
+ (*vtoc)->efi_parts[i].p_flag = default_vtoc_map[i].p_flag;
+ (*vtoc)->efi_parts[i].p_start = 0;
+ (*vtoc)->efi_parts[i].p_size = 0;
+ }
+ /*
+ * Make constants first
+ * and variable partitions later
+ */
+
+ /* root partition - s0 128 MB */
+ (*vtoc)->efi_parts[0].p_start = 34;
+ (*vtoc)->efi_parts[0].p_size = 262144;
+
+ /* partition - s1 128 MB */
+ (*vtoc)->efi_parts[1].p_start = 262178;
+ (*vtoc)->efi_parts[1].p_size = 262144;
+
+ /* partition -s2 is NOT the Backup disk */
+ (*vtoc)->efi_parts[2].p_tag = V_UNASSIGNED;
+
+ /* partition -s6 /usr partition - HOG */
+ (*vtoc)->efi_parts[6].p_start = 524322;
+ (*vtoc)->efi_parts[6].p_size = (*vtoc)->efi_last_u_lba - 524322
+ - (1024 * 16);
+
+ /* efi reserved partition - s9 16K */
+ (*vtoc)->efi_parts[8].p_start = (*vtoc)->efi_last_u_lba - (1024 * 16);
+ (*vtoc)->efi_parts[8].p_size = (1024 * 16);
+ (*vtoc)->efi_parts[8].p_tag = V_RESERVED;
+ return (0);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-04 07:03:17 +0000