zfs: merge openzfs/zfs@86783d7d9 (zfs-2.1-release) into stable/13

OpenZFS release 2.1.12

Notable upstream pull requeset merges:
  #14145 Storage device expansion "silently" fails on degraded vdev
  #14358 Wait for txg sync if the last DRR_FREEOBJECTS might result in
         a hole
  #14410 Improve resilver ETAs
  #14428 Resilver performance tuning
  #14501 FreeBSD: don't verify recycled vnode for zfs control directory
  #14524 Ignore too large stack in case of dsl_deadlist_merge
  #14659 Allow MMP to bypass waiting for other threads
  #14722 Fix "Detach spare vdev in case if resilvering does not happen"
  #14774 FreeBSD .zfs fixups
  #14776 FreeBSD: make zfs_vfs_held() definition consistent with
         declaration
  #14788 FreeBSD: add missing vop_fplookup assignments
  #14794 zpool import -m also removing spare and cache when log device
         is missing
  #14795 Fix positive ABD size assertion in abd_verify()
  #14798 Mark TX_COMMIT transaction with TXG_NOTHROTTLE
  #14811 Refine special_small_blocks property validation
  #14816 Fix two abd_gang_add_gang() issues
  #14819 Add dmu_tx_hold_append() interface
  #14823 Remove single parent assertion from zio_nowait()
  #14853 zil: Don't expect zio_shrink() to succeed
  #14861 Probe vdevs before marking removed
  #14873 Add the ability to uninitialize a zpool
  #14892 Fix concurrent resilvers initiated at same time
  #14903 Fix NULL pointer dereference when doing concurrent 'send'
         operations
  #14910 ZIL: Allow to replay blocks of any size

Obtained from:	OpenZFS
OpenZFS tag:	zfs-2.1.12
OpenZFS commit:	86783d7d92cf7a859464719a917fdff845b9a9e1
Relnotes:	yes

119 files changed, 2707 insertions, 453 deletions

diff --git a/sys/contrib/openzfs/META b/sys/contrib/openzfs/META
index c2db34689128..83990acf1e38 100644
--- a/sys/contrib/openzfs/META
+++ b/sys/contrib/openzfs/META
@@ -1,10 +1,10 @@
 Meta:          1
 Name:          zfs
 Branch:        1.0
-Version:       2.1.11
+Version:       2.1.12
 Release:       1
 Release-Tags:  relext
 License:       CDDL
 Author:        OpenZFS
-Linux-Maximum: 6.2
+Linux-Maximum: 6.3
 Linux-Minimum: 3.10
diff --git a/sys/contrib/openzfs/cmd/zdb/zdb.c b/sys/contrib/openzfs/cmd/zdb/zdb.c
index f424dd771f70..bcd520de380b 100644
--- a/sys/contrib/openzfs/cmd/zdb/zdb.c
+++ b/sys/contrib/openzfs/cmd/zdb/zdb.c
@@ -3102,13 +3102,22 @@ dump_znode_sa_xattr(sa_handle_t *hdl)
 	(void) printf("\tSA xattrs: %d bytes, %d entries\n\n",
 	    sa_xattr_size, sa_xattr_entries);
 	while ((elem = nvlist_next_nvpair(sa_xattr, elem)) != NULL) {
+		boolean_t can_print = !dump_opt['P'];
 		uchar_t *value;
 		uint_t cnt, idx;
 
 		(void) printf("\t\t%s = ", nvpair_name(elem));
 		nvpair_value_byte_array(elem, &value, &cnt);
+
+		for (idx = 0; idx < cnt; ++idx) {
+			if (!isprint(value[idx])) {
+				can_print = B_FALSE;
+				break;
+			}
+		}
+
 		for (idx = 0; idx < cnt; ++idx) {
-			if (isprint(value[idx]))
+			if (can_print)
 				(void) putchar(value[idx]);
 			else
 				(void) printf("\\%3.3o", value[idx]);
diff --git a/sys/contrib/openzfs/cmd/zed/agents/zfs_retire.c b/sys/contrib/openzfs/cmd/zed/agents/zfs_retire.c
index b4794e31193f..29eaee7503a0 100644
--- a/sys/contrib/openzfs/cmd/zed/agents/zfs_retire.c
+++ b/sys/contrib/openzfs/cmd/zed/agents/zfs_retire.c
@@ -444,14 +444,16 @@ zfs_retire_recv(fmd_hdl_t *hdl, fmd_event_t *ep, nvlist_t *nvl,
 			return;
 
 		/* Remove the vdev since device is unplugged */
+		int remove_status = 0;
 		if (l2arc || (strcmp(class, "resource.fs.zfs.removed") == 0)) {
-			int status = zpool_vdev_remove_wanted(zhp, devname);
+			remove_status = zpool_vdev_remove_wanted(zhp, devname);
 			fmd_hdl_debug(hdl, "zpool_vdev_remove_wanted '%s'"
-			    ", ret:%d", devname, status);
+			    ", err:%d", devname, libzfs_errno(zhdl));
 		}
 
 		/* Replace the vdev with a spare if its not a l2arc */
-		if (!l2arc && (!fmd_prop_get_int32(hdl, "spare_on_remove") ||
+		if (!l2arc && !remove_status &&
+		    (!fmd_prop_get_int32(hdl, "spare_on_remove") ||
 		    replace_with_spare(hdl, zhp, vdev) == B_FALSE)) {
 			/* Could not handle with spare */
 			fmd_hdl_debug(hdl, "no spare for '%s'", devname);
diff --git a/sys/contrib/openzfs/cmd/zpool/zpool_main.c b/sys/contrib/openzfs/cmd/zpool/zpool_main.c
index 2311d4f046f6..a06af9aeceb4 100644
--- a/sys/contrib/openzfs/cmd/zpool/zpool_main.c
+++ b/sys/contrib/openzfs/cmd/zpool/zpool_main.c
@@ -392,7 +392,7 @@ get_usage(zpool_help_t idx)
 	case HELP_REOPEN:
 		return (gettext("\treopen [-n] <pool>\n"));
 	case HELP_INITIALIZE:
-		return (gettext("\tinitialize [-c | -s] [-w] <pool> "
+		return (gettext("\tinitialize [-c | -s | -u] [-w] <pool> "
 		    "[<device> ...]\n"));
 	case HELP_SCRUB:
 		return (gettext("\tscrub [-s | -p] [-w] <pool> ...\n"));
@@ -548,12 +548,13 @@ usage(boolean_t requested)
 }
 
 /*
- * zpool initialize [-c | -s] [-w] <pool> [<vdev> ...]
+ * zpool initialize [-c | -s | -u] [-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.
+ *	-u	Uninitialize. Clears initialization state.
  *	-w	Wait. Blocks until initializing has completed.
  */
 int
@@ -569,12 +570,14 @@ zpool_do_initialize(int argc, char **argv)
 	struct option long_options[] = {
 		{"cancel",	no_argument,		NULL, 'c'},
 		{"suspend",	no_argument,		NULL, 's'},
+		{"uninit",	no_argument,		NULL, 'u'},
 		{"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) {
+	while ((c = getopt_long(argc, argv, "csuw", long_options,
+	    NULL)) != -1) {
 		switch (c) {
 		case 'c':
 			if (cmd_type != POOL_INITIALIZE_START &&
@@ -594,6 +597,15 @@ zpool_do_initialize(int argc, char **argv)
 			}
 			cmd_type = POOL_INITIALIZE_SUSPEND;
 			break;
+		case 'u':
+			if (cmd_type != POOL_INITIALIZE_START &&
+			    cmd_type != POOL_INITIALIZE_UNINIT) {
+				(void) fprintf(stderr, gettext("-u cannot be "
+				    "combined with other options\n"));
+				usage(B_FALSE);
+			}
+			cmd_type = POOL_INITIALIZE_UNINIT;
+			break;
 		case 'w':
 			wait = B_TRUE;
 			break;
@@ -620,8 +632,8 @@ zpool_do_initialize(int argc, char **argv)
 	}
 
 	if (wait && (cmd_type != POOL_INITIALIZE_START)) {
-		(void) fprintf(stderr, gettext("-w cannot be used with -c or "
-		    "-s\n"));
+		(void) fprintf(stderr, gettext("-w cannot be used with -c, -s"
+		    "or -u\n"));
 		usage(B_FALSE);
 	}
 
@@ -6921,6 +6933,17 @@ zpool_do_online(int argc, char **argv)
 		return (1);
 
 	for (i = 1; i < argc; i++) {
+		vdev_state_t oldstate;
+		boolean_t avail_spare, l2cache;
+		nvlist_t *tgt = zpool_find_vdev(zhp, argv[i], &avail_spare,
+		    &l2cache, NULL);
+		if (tgt == NULL) {
+			ret = 1;
+			continue;
+		}
+		uint_t vsc;
+		oldstate = ((vdev_stat_t *)fnvlist_lookup_uint64_array(tgt,
+		    ZPOOL_CONFIG_VDEV_STATS, &vsc))->vs_state;
 		if (zpool_vdev_online(zhp, argv[i], flags, &newstate) == 0) {
 			if (newstate != VDEV_STATE_HEALTHY) {
 				(void) printf(gettext("warning: device '%s' "
@@ -6934,6 +6957,17 @@ zpool_do_online(int argc, char **argv)
 					(void) printf(gettext("use 'zpool "
 					    "replace' to replace devices "
 					    "that are no longer present\n"));
+				if ((flags & ZFS_ONLINE_EXPAND)) {
+					(void) printf(gettext("%s: failed "
+					    "to expand usable space on "
+					    "unhealthy device '%s'\n"),
+					    (oldstate >= VDEV_STATE_DEGRADED ?
+					    "error" : "warning"), argv[i]);
+					if (oldstate >= VDEV_STATE_DEGRADED) {
+						ret = 1;
+						break;
+					}
+				}
 			}
 		} else {
 			ret = 1;
@@ -7549,19 +7583,20 @@ print_scan_scrub_resilver_status(pool_scan_stat_t *ps)
 
 	zfs_nicebytes(ps->pss_processed, processed_buf, sizeof (processed_buf));
 
-	assert(ps->pss_func == POOL_SCAN_SCRUB ||
-	    ps->pss_func == POOL_SCAN_RESILVER);
+	int is_resilver = ps->pss_func == POOL_SCAN_RESILVER;
+	int is_scrub = ps->pss_func == POOL_SCAN_SCRUB;
+	assert(is_resilver || is_scrub);
 
 	/* 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) {
+		if (is_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) {
+		} else if (is_resilver) {
 			(void) printf(gettext("resilvered %s "
 			    "in %s with %llu errors on %s"), processed_buf,
 			    time_buf, (u_longlong_t)ps->pss_errors,
@@ -7569,10 +7604,10 @@ print_scan_scrub_resilver_status(pool_scan_stat_t *ps)
 		}
 		return;
 	} else if (ps->pss_state == DSS_CANCELED) {
-		if (ps->pss_func == POOL_SCAN_SCRUB) {
+		if (is_scrub) {
 			(void) printf(gettext("scrub canceled on %s"),
 			    ctime(&end));
-		} else if (ps->pss_func == POOL_SCAN_RESILVER) {
+		} else if (is_resilver) {
 			(void) printf(gettext("resilver canceled on %s"),
 			    ctime(&end));
 		}
@@ -7582,7 +7617,7 @@ print_scan_scrub_resilver_status(pool_scan_stat_t *ps)
 	assert(ps->pss_state == DSS_SCANNING);
 
 	/* Scan is in progress. Resilvers can't be paused. */
-	if (ps->pss_func == POOL_SCAN_SCRUB) {
+	if (is_scrub) {
 		if (pause == 0) {
 			(void) printf(gettext("scrub in progress since %s"),
 			    ctime(&start));
@@ -7592,7 +7627,7 @@ print_scan_scrub_resilver_status(pool_scan_stat_t *ps)
 			(void) printf(gettext("\tscrub started on %s"),
 			    ctime(&start));
 		}
-	} else if (ps->pss_func == POOL_SCAN_RESILVER) {
+	} else if (is_resilver) {
 		(void) printf(gettext("resilver in progress since %s"),
 		    ctime(&start));
 	}
@@ -7634,17 +7669,27 @@ print_scan_scrub_resilver_status(pool_scan_stat_t *ps)
 		    scanned_buf, issued_buf, total_buf);
 	}
 
-	if (ps->pss_func == POOL_SCAN_RESILVER) {
+	if (is_resilver) {
 		(void) printf(gettext("\t%s resilvered, %.2f%% done"),
 		    processed_buf, 100 * fraction_done);
-	} else if (ps->pss_func == POOL_SCAN_SCRUB) {
+	} else if (is_scrub) {
 		(void) printf(gettext("\t%s repaired, %.2f%% done"),
 		    processed_buf, 100 * fraction_done);
 	}
 
 	if (pause == 0) {
+		/*
+		 * Only provide an estimate iff:
+		 * 1) the time remaining is valid, and
+		 * 2) the issue rate exceeds 10 MB/s, and
+		 * 3) it's either:
+		 *    a) a resilver which has started repairs, or
+		 *    b) a scrub which has entered the issue phase.
+		 */
 		if (total_secs_left != UINT64_MAX &&
-		    issue_rate >= 10 * 1024 * 1024) {
+		    issue_rate >= 10 * 1024 * 1024 &&
+		    ((is_resilver && ps->pss_processed > 0) ||
+		    (is_scrub && issued > 0))) {
 			(void) printf(gettext(", %s to go\n"), time_buf);
 		} else {
 			(void) printf(gettext(", no estimated "
diff --git a/sys/contrib/openzfs/config/always-compiler-options.m4 b/sys/contrib/openzfs/config/always-compiler-options.m4
index 5046ce0ddb83..0f66db584972 100644
--- a/sys/contrib/openzfs/config/always-compiler-options.m4
+++ b/sys/contrib/openzfs/config/always-compiler-options.m4
@@ -221,3 +221,34 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_IPA_SRA], [
 	CFLAGS="$saved_flags"
 	AC_SUBST([NO_IPA_SRA])
 ])
+
+dnl #
+dnl # Check if kernel cc supports -fno-ipa-sra option.
+dnl #
+AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_KERNEL_CC_NO_IPA_SRA], [
+	AC_MSG_CHECKING([whether $KERNEL_CC supports -fno-ipa-sra])
+
+	saved_cc="$CC"
+	saved_flags="$CFLAGS"
+	CC="gcc"
+	CFLAGS="$CFLAGS -Werror -fno-ipa-sra"
+
+	AS_IF([ test -n "$KERNEL_CC" ], [
+		CC="$KERNEL_CC"
+	])
+	AS_IF([ test -n "$KERNEL_LLVM" ], [
+		CC="clang"
+	])
+
+	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
+		KERNEL_NO_IPA_SRA=-fno-ipa-sra
+		AC_MSG_RESULT([yes])
+	], [
+		KERNEL_NO_IPA_SRA=
+		AC_MSG_RESULT([no])
+	])
+
+	CC="$saved_cc"
+	CFLAGS="$saved_flags"
+	AC_SUBST([KERNEL_NO_IPA_SRA])
+])
diff --git a/sys/contrib/openzfs/config/kernel-acl.m4 b/sys/contrib/openzfs/config/kernel-acl.m4
index 6e92da97d0fe..be08c3c60724 100644
--- a/sys/contrib/openzfs/config/kernel-acl.m4
+++ b/sys/contrib/openzfs/config/kernel-acl.m4
@@ -236,7 +236,22 @@ dnl #
 dnl # 6.2 API change,
 dnl # set_acl() second paramter changed to a struct dentry *
 dnl #
+dnl # 6.3 API change,
+dnl # set_acl() first parameter changed to struct mnt_idmap *
+dnl #
 AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_OPERATIONS_SET_ACL], [
+	ZFS_LINUX_TEST_SRC([inode_operations_set_acl_mnt_idmap_dentry], [
+		#include <linux/fs.h>
+
+		int set_acl_fn(struct mnt_idmap *idmap,
+		    struct dentry *dent, struct posix_acl *acl,
+		    int type) { return 0; }
+
+		static const struct inode_operations
+		    iops __attribute__ ((unused)) = {
+			.set_acl = set_acl_fn,
+		};
+	],[])
 	ZFS_LINUX_TEST_SRC([inode_operations_set_acl_userns_dentry], [
 		#include <linux/fs.h>
 
@@ -281,17 +296,24 @@ AC_DEFUN([ZFS_AC_KERNEL_INODE_OPERATIONS_SET_ACL], [
 		AC_DEFINE(HAVE_SET_ACL, 1, [iops->set_acl() exists])
 		AC_DEFINE(HAVE_SET_ACL_USERNS, 1, [iops->set_acl() takes 4 args])
 	],[
-		ZFS_LINUX_TEST_RESULT([inode_operations_set_acl_userns_dentry], [
+		ZFS_LINUX_TEST_RESULT([inode_operations_set_acl_mnt_idmap_dentry], [
 			AC_MSG_RESULT(yes)
 			AC_DEFINE(HAVE_SET_ACL, 1, [iops->set_acl() exists])
-			AC_DEFINE(HAVE_SET_ACL_USERNS_DENTRY_ARG2, 1,
-			    [iops->set_acl() takes 4 args, arg2 is struct dentry *])
+			AC_DEFINE(HAVE_SET_ACL_IDMAP_DENTRY, 1,
+			    [iops->set_acl() takes 4 args, arg1 is struct mnt_idmap *])
 		],[
-			ZFS_LINUX_TEST_RESULT([inode_operations_set_acl], [
+			ZFS_LINUX_TEST_RESULT([inode_operations_set_acl_userns_dentry], [
 				AC_MSG_RESULT(yes)
-				AC_DEFINE(HAVE_SET_ACL, 1, [iops->set_acl() exists, takes 3 args])
+				AC_DEFINE(HAVE_SET_ACL, 1, [iops->set_acl() exists])
+				AC_DEFINE(HAVE_SET_ACL_USERNS_DENTRY_ARG2, 1,
+				    [iops->set_acl() takes 4 args, arg2 is struct dentry *])
 			],[
-				ZFS_LINUX_REQUIRE_API([i_op->set_acl()], [3.14])
+				ZFS_LINUX_TEST_RESULT([inode_operations_set_acl], [
+					AC_MSG_RESULT(yes)
+					AC_DEFINE(HAVE_SET_ACL, 1, [iops->set_acl() exists, takes 3 args])
+				],[
+					ZFS_LINUX_REQUIRE_API([i_op->set_acl()], [3.14])
+				])
 			])
 		])
 	])
diff --git a/sys/contrib/openzfs/config/kernel-cpu_has_feature.m4 b/sys/contrib/openzfs/config/kernel-cpu_has_feature.m4
new file mode 100644
index 000000000000..608faf0f89fe
--- /dev/null
+++ b/sys/contrib/openzfs/config/kernel-cpu_has_feature.m4
@@ -0,0 +1,29 @@
+dnl #
+dnl # cpu_has_feature() may referencing GPL-only cpu_feature_keys on powerpc
+dnl #
+
+dnl #
+dnl # Checking if cpu_has_feature is exported GPL-only
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_SRC_CPU_HAS_FEATURE], [
+	ZFS_LINUX_TEST_SRC([cpu_has_feature], [
+		#include <linux/version.h>
+		#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)
+		#include <asm/cpu_has_feature.h>
+		#else
+		#include <asm/cputable.h>
+		#endif
+	], [
+		return cpu_has_feature(CPU_FTR_ALTIVEC) ? 0 : 1;
+	], [], [ZFS_META_LICENSE])
+])
+AC_DEFUN([ZFS_AC_KERNEL_CPU_HAS_FEATURE], [
+	AC_MSG_CHECKING([whether cpu_has_feature() is GPL-only])
+	ZFS_LINUX_TEST_RESULT([cpu_has_feature_license], [
+		AC_MSG_RESULT(no)
+	], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_CPU_HAS_FEATURE_GPL_ONLY, 1,
+		    [cpu_has_feature() is GPL-only])
+	])
+])
diff --git a/sys/contrib/openzfs/config/kernel-filemap.m4 b/sys/contrib/openzfs/config/kernel-filemap.m4
new file mode 100644
index 000000000000..745928168f92
--- /dev/null
+++ b/sys/contrib/openzfs/config/kernel-filemap.m4
@@ -0,0 +1,26 @@
+dnl #
+dnl # filemap_range_has_page was not available till 4.13
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_SRC_FILEMAP], [
+	ZFS_LINUX_TEST_SRC([filemap_range_has_page], [
+		#include <linux/fs.h>
+	],[
+		struct address_space *mapping = NULL;
+		loff_t lstart = 0;
+		loff_t lend = 0;
+		bool ret __attribute__ ((unused));
+
+		ret = filemap_range_has_page(mapping, lstart, lend);
+	])
+])
+
+AC_DEFUN([ZFS_AC_KERNEL_FILEMAP], [
+	AC_MSG_CHECKING([whether filemap_range_has_page() is available])
+	ZFS_LINUX_TEST_RESULT([filemap_range_has_page], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_FILEMAP_RANGE_HAS_PAGE, 1,
+		[filemap_range_has_page() is available])
+	],[
+		AC_MSG_RESULT(no)
+	])
+])
diff --git a/sys/contrib/openzfs/config/kernel-flush_dcache_page.m4 b/sys/contrib/openzfs/config/kernel-flush_dcache_page.m4
new file mode 100644
index 000000000000..2340c386ef57
--- /dev/null
+++ b/sys/contrib/openzfs/config/kernel-flush_dcache_page.m4
@@ -0,0 +1,26 @@
+dnl #
+dnl # Starting from Linux 5.13, flush_dcache_page() becomes an inline
+dnl # function and may indirectly referencing GPL-only cpu_feature_keys on
+dnl # powerpc
+dnl #
+
+dnl #
+dnl # Checking if flush_dcache_page is exported GPL-only
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_SRC_FLUSH_DCACHE_PAGE], [
+	ZFS_LINUX_TEST_SRC([flush_dcache_page], [
+		#include <asm/cacheflush.h>
+	], [
+		flush_dcache_page(0);
+	], [], [ZFS_META_LICENSE])
+])
+AC_DEFUN([ZFS_AC_KERNEL_FLUSH_DCACHE_PAGE], [
+	AC_MSG_CHECKING([whether flush_dcache_page() is GPL-only])
+	ZFS_LINUX_TEST_RESULT([flush_dcache_page_license], [
+		AC_MSG_RESULT(no)
+	], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_FLUSH_DCACHE_PAGE_GPL_ONLY, 1,
+		    [flush_dcache_page() is GPL-only])
+	])
+])
diff --git a/sys/contrib/openzfs/config/kernel-generic_fillattr.m4 b/sys/contrib/openzfs/config/kernel-generic_fillattr.m4
index 0acd5d53103f..02dee4d4c000 100644
--- a/sys/contrib/openzfs/config/kernel-generic_fillattr.m4
+++ b/sys/contrib/openzfs/config/kernel-generic_fillattr.m4
@@ -4,7 +4,10 @@ dnl #
 dnl # generic_fillattr in linux/fs.h now requires a struct user_namespace*
 dnl # as the first arg, to support idmapped mounts.
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_FILLATTR_USERNS], [
+dnl # 6.3 API
+dnl # generic_fillattr() now takes struct mnt_idmap* as the first argument
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_FILLATTR], [
 	ZFS_LINUX_TEST_SRC([generic_fillattr_userns], [
 		#include <linux/fs.h>
 	],[
@@ -13,16 +16,32 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_FILLATTR_USERNS], [
 		struct kstat *k = NULL;
 		generic_fillattr(userns, in, k);
 	])
+
+	ZFS_LINUX_TEST_SRC([generic_fillattr_mnt_idmap], [
+		#include <linux/fs.h>
+	],[
+		struct mnt_idmap *idmap = NULL;
+		struct inode *in = NULL;
+		struct kstat *k = NULL;
+		generic_fillattr(idmap, in, k);
+	])
 ])
 
-AC_DEFUN([ZFS_AC_KERNEL_GENERIC_FILLATTR_USERNS], [
-	AC_MSG_CHECKING([whether generic_fillattr requires struct user_namespace*])
-	ZFS_LINUX_TEST_RESULT([generic_fillattr_userns], [
+AC_DEFUN([ZFS_AC_KERNEL_GENERIC_FILLATTR], [
+	AC_MSG_CHECKING([whether generic_fillattr requires struct mnt_idmap*])
+	ZFS_LINUX_TEST_RESULT([generic_fillattr_mnt_idmap], [
 		AC_MSG_RESULT([yes])
-		AC_DEFINE(HAVE_GENERIC_FILLATTR_USERNS, 1,
-		    [generic_fillattr requires struct user_namespace*])
+		AC_DEFINE(HAVE_GENERIC_FILLATTR_IDMAP, 1,
+		    [generic_fillattr requires struct mnt_idmap*])
 	],[
-		AC_MSG_RESULT([no])
+		AC_MSG_CHECKING([whether generic_fillattr requires struct user_namespace*])
+		ZFS_LINUX_TEST_RESULT([generic_fillattr_userns], [
+			AC_MSG_RESULT([yes])
+			AC_DEFINE(HAVE_GENERIC_FILLATTR_USERNS, 1,
+			    [generic_fillattr requires struct user_namespace*])
+		],[
+			AC_MSG_RESULT([no])
+		])
 	])
 ])
 
diff --git a/sys/contrib/openzfs/config/kernel-inode-create.m4 b/sys/contrib/openzfs/config/kernel-inode-create.m4
index a6ea11fb61b2..9e9e43180976 100644
--- a/sys/contrib/openzfs/config/kernel-inode-create.m4
+++ b/sys/contrib/openzfs/config/kernel-inode-create.m4
@@ -1,5 +1,23 @@
 AC_DEFUN([ZFS_AC_KERNEL_SRC_CREATE], [
 	dnl #
+	dnl # 6.3 API change
+	dnl # The first arg is changed to struct mnt_idmap *
+	dnl #
+	ZFS_LINUX_TEST_SRC([create_mnt_idmap], [
+		#include <linux/fs.h>
+		#include <linux/sched.h>
+
+		int inode_create(struct mnt_idmap *idmap,
+		    struct inode *inode ,struct dentry *dentry,
+		    umode_t umode, bool flag) { return 0; }
+
+		static const struct inode_operations
+			iops __attribute__ ((unused)) = {
+			.create         = inode_create,
+		};
+	],[])
+
+	dnl #
 	dnl # 5.12 API change that added the struct user_namespace* arg
 	dnl # to the front of this function type's arg list.
 	dnl #
@@ -35,19 +53,28 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_CREATE], [
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_CREATE], [
-	AC_MSG_CHECKING([whether iops->create() takes struct user_namespace*])
-	ZFS_LINUX_TEST_RESULT([create_userns], [
+	AC_MSG_CHECKING([whether iops->create() takes struct mnt_idmap*])
+	ZFS_LINUX_TEST_RESULT([create_mnt_idmap], [
 		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_IOPS_CREATE_USERNS, 1,
-		   [iops->create() takes struct user_namespace*])
+		AC_DEFINE(HAVE_IOPS_CREATE_IDMAP, 1,
+		   [iops->create() takes struct mnt_idmap*])
 	],[
 		AC_MSG_RESULT(no)
 
-		AC_MSG_CHECKING([whether iops->create() passes flags])
-		ZFS_LINUX_TEST_RESULT([create_flags], [
+		AC_MSG_CHECKING([whether iops->create() takes struct user_namespace*])
+		ZFS_LINUX_TEST_RESULT([create_userns], [
 			AC_MSG_RESULT(yes)
+			AC_DEFINE(HAVE_IOPS_CREATE_USERNS, 1,
+			   [iops->create() takes struct user_namespace*])
 		],[
-			ZFS_LINUX_TEST_ERROR([iops->create()])
+			AC_MSG_RESULT(no)
+
+			AC_MSG_CHECKING([whether iops->create() passes flags])
+			ZFS_LINUX_TEST_RESULT([create_flags], [
+				AC_MSG_RESULT(yes)
+			],[
+				ZFS_LINUX_TEST_ERROR([iops->create()])
+			])
 		])
 	])
 ])
diff --git a/sys/contrib/openzfs/config/kernel-inode-getattr.m4 b/sys/contrib/openzfs/config/kernel-inode-getattr.m4
index f62e82f5230a..c8bfb07862ab 100644
--- a/sys/contrib/openzfs/config/kernel-inode-getattr.m4
+++ b/sys/contrib/openzfs/config/kernel-inode-getattr.m4
@@ -1,5 +1,25 @@
 AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_GETATTR], [
 	dnl #
+	dnl # Linux 6.3 API
+	dnl # The first arg of getattr I/O operations handler type
+	dnl # is changed to struct mnt_idmap*
+	dnl #
+	ZFS_LINUX_TEST_SRC([inode_operations_getattr_mnt_idmap], [
+		#include <linux/fs.h>
+
+		int test_getattr(
+		    struct mnt_idmap *idmap,
+		    const struct path *p, struct kstat *k,
+		    u32 request_mask, unsigned int query_flags)
+		    { return 0; }
+
+		static const struct inode_operations
+		    iops __attribute__ ((unused)) = {
+			.getattr = test_getattr,
+		};
+	],[])
+
+	dnl #
 	dnl # Linux 5.12 API
 	dnl # The getattr I/O operations handler type was extended to require
 	dnl # a struct user_namespace* as its first arg, to support idmapped
@@ -55,37 +75,48 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_GETATTR], [
 
 AC_DEFUN([ZFS_AC_KERNEL_INODE_GETATTR], [
 	dnl #
-	dnl # Kernel 5.12 test
+	dnl # Kernel 6.3 test
 	dnl #
-	AC_MSG_CHECKING([whether iops->getattr() takes user_namespace])
-	ZFS_LINUX_TEST_RESULT([inode_operations_getattr_userns], [
+	AC_MSG_CHECKING([whether iops->getattr() takes mnt_idmap])
+	ZFS_LINUX_TEST_RESULT([inode_operations_getattr_mnt_idmap], [
 		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_USERNS_IOPS_GETATTR, 1,
-		    [iops->getattr() takes struct user_namespace*])
+		AC_DEFINE(HAVE_IDMAP_IOPS_GETATTR, 1,
+		    [iops->getattr() takes struct mnt_idmap*])
 	],[
 		AC_MSG_RESULT(no)
-
 		dnl #
-		dnl # Kernel 4.11 test
+		dnl # Kernel 5.12 test
 		dnl #
-		AC_MSG_CHECKING([whether iops->getattr() takes a path])
-		ZFS_LINUX_TEST_RESULT([inode_operations_getattr_path], [
+		AC_MSG_CHECKING([whether iops->getattr() takes user_namespace])
+		ZFS_LINUX_TEST_RESULT([inode_operations_getattr_userns], [
 			AC_MSG_RESULT(yes)
-			AC_DEFINE(HAVE_PATH_IOPS_GETATTR, 1,
-				[iops->getattr() takes a path])
+			AC_DEFINE(HAVE_USERNS_IOPS_GETATTR, 1,
+			    [iops->getattr() takes struct user_namespace*])
 		],[
 			AC_MSG_RESULT(no)
 
 			dnl #
-			dnl # Kernel < 4.11 test
+			dnl # Kernel 4.11 test
 			dnl #
-			AC_MSG_CHECKING([whether iops->getattr() takes a vfsmount])
-			ZFS_LINUX_TEST_RESULT([inode_operations_getattr_vfsmount], [
+			AC_MSG_CHECKING([whether iops->getattr() takes a path])
+			ZFS_LINUX_TEST_RESULT([inode_operations_getattr_path], [
 				AC_MSG_RESULT(yes)
-				AC_DEFINE(HAVE_VFSMOUNT_IOPS_GETATTR, 1,
-					[iops->getattr() takes a vfsmount])
+				AC_DEFINE(HAVE_PATH_IOPS_GETATTR, 1,
+					[iops->getattr() takes a path])
 			],[
 				AC_MSG_RESULT(no)
+
+				dnl #
+				dnl # Kernel < 4.11 test
+				dnl #
+				AC_MSG_CHECKING([whether iops->getattr() takes a vfsmount])
+				ZFS_LINUX_TEST_RESULT([inode_operations_getattr_vfsmount], [
+					AC_MSG_RESULT(yes)
+					AC_DEFINE(HAVE_VFSMOUNT_IOPS_GETATTR, 1,
+						[iops->getattr() takes a vfsmount])
+				],[
+					AC_MSG_RESULT(no)
+				])
 			])
 		])
 	])
diff --git a/sys/contrib/openzfs/config/kernel-inode-setattr.m4 b/sys/contrib/openzfs/config/kernel-inode-setattr.m4
new file mode 100644
index 000000000000..45755b4eb273
--- /dev/null
+++ b/sys/contrib/openzfs/config/kernel-inode-setattr.m4
@@ -0,0 +1,87 @@
+AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_SETATTR], [
+	dnl #
+	dnl # Linux 6.3 API
+	dnl # The first arg of setattr I/O operations handler type
+	dnl # is changed to struct mnt_idmap*
+	dnl #
+	ZFS_LINUX_TEST_SRC([inode_operations_setattr_mnt_idmap], [
+		#include <linux/fs.h>
+
+		int test_setattr(
+		    struct mnt_idmap *idmap,
+		    struct dentry *de, struct iattr *ia)
+		    { return 0; }
+
+		static const struct inode_operations
+		    iops __attribute__ ((unused)) = {
+			.setattr = test_setattr,
+		};
+	],[])
+
+	dnl #
+	dnl # Linux 5.12 API
+	dnl # The setattr I/O operations handler type was extended to require
+	dnl # a struct user_namespace* as its first arg, to support idmapped
+	dnl # mounts.
+	dnl #
+	ZFS_LINUX_TEST_SRC([inode_operations_setattr_userns], [
+		#include <linux/fs.h>
+
+		int test_setattr(
+		    struct user_namespace *userns,
+		    struct dentry *de, struct iattr *ia)
+		    { return 0; }
+
+		static const struct inode_operations
+		    iops __attribute__ ((unused)) = {
+			.setattr = test_setattr,
+		};
+	],[])
+
+	ZFS_LINUX_TEST_SRC([inode_operations_setattr], [
+		#include <linux/fs.h>
+
+		int test_setattr(
+		    struct dentry *de, struct iattr *ia)
+		    { return 0; }
+
+		static const struct inode_operations
+		    iops __attribute__ ((unused)) = {
+			.setattr = test_setattr,
+		};
+	],[])
+])
+
+AC_DEFUN([ZFS_AC_KERNEL_INODE_SETATTR], [
+	dnl #
+	dnl # Kernel 6.3 test
+	dnl #
+	AC_MSG_CHECKING([whether iops->setattr() takes mnt_idmap])
+	ZFS_LINUX_TEST_RESULT([inode_operations_setattr_mnt_idmap], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_IDMAP_IOPS_SETATTR, 1,
+		    [iops->setattr() takes struct mnt_idmap*])
+	],[
+		AC_MSG_RESULT(no)
+		dnl #
+		dnl # Kernel 5.12 test
+		dnl #
+		AC_MSG_CHECKING([whether iops->setattr() takes user_namespace])
+		ZFS_LINUX_TEST_RESULT([inode_operations_setattr_userns], [
+			AC_MSG_RESULT(yes)
+			AC_DEFINE(HAVE_USERNS_IOPS_SETATTR, 1,
+			    [iops->setattr() takes struct user_namespace*])
+		],[
+			AC_MSG_RESULT(no)
+
+			AC_MSG_CHECKING([whether iops->setattr() exists])
+			ZFS_LINUX_TEST_RESULT([inode_operations_setattr], [
+				AC_MSG_RESULT(yes)
+				AC_DEFINE(HAVE_IOPS_SETATTR, 1,
+					[iops->setattr() exists])
+			],[
+				AC_MSG_RESULT(no)
+			])
+		])
+	])
+])
diff --git a/sys/contrib/openzfs/config/kernel-is_owner_or_cap.m4 b/sys/contrib/openzfs/config/kernel-is_owner_or_cap.m4
index a90cf3da641d..4e9c002b77f2 100644
--- a/sys/contrib/openzfs/config/kernel-is_owner_or_cap.m4
+++ b/sys/contrib/openzfs/config/kernel-is_owner_or_cap.m4
@@ -16,12 +16,20 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_OWNER_OR_CAPABLE], [
 		(void) inode_owner_or_capable(ip);
 	])
 
-	ZFS_LINUX_TEST_SRC([inode_owner_or_capable_idmapped], [
+	ZFS_LINUX_TEST_SRC([inode_owner_or_capable_userns], [
 		#include <linux/fs.h>
 	],[
 		struct inode *ip = NULL;
 		(void) inode_owner_or_capable(&init_user_ns, ip);
 	])
+
+	ZFS_LINUX_TEST_SRC([inode_owner_or_capable_mnt_idmap], [
+		#include <linux/fs.h>
+		#include <linux/mnt_idmapping.h>
+	],[
+		struct inode *ip = NULL;
+		(void) inode_owner_or_capable(&nop_mnt_idmap, ip);
+	])
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_INODE_OWNER_OR_CAPABLE], [
@@ -35,12 +43,21 @@ AC_DEFUN([ZFS_AC_KERNEL_INODE_OWNER_OR_CAPABLE], [
 
 		AC_MSG_CHECKING(
 		    [whether inode_owner_or_capable() takes user_ns])
-		ZFS_LINUX_TEST_RESULT([inode_owner_or_capable_idmapped], [
+		ZFS_LINUX_TEST_RESULT([inode_owner_or_capable_userns], [
 			AC_MSG_RESULT(yes)
-			AC_DEFINE(HAVE_INODE_OWNER_OR_CAPABLE_IDMAPPED, 1,
+			AC_DEFINE(HAVE_INODE_OWNER_OR_CAPABLE_USERNS, 1,
 			    [inode_owner_or_capable() takes user_ns])
 		],[
-			ZFS_LINUX_TEST_ERROR([capability])
+			AC_MSG_RESULT(no)
+			AC_MSG_CHECKING(
+			    [whether inode_owner_or_capable() takes mnt_idmap])
+			ZFS_LINUX_TEST_RESULT([inode_owner_or_capable_mnt_idmap], [
+				AC_MSG_RESULT(yes)
+				AC_DEFINE(HAVE_INODE_OWNER_OR_CAPABLE_IDMAP, 1,
+				    [inode_owner_or_capable() takes mnt_idmap])
+			], [
+				ZFS_LINUX_TEST_ERROR([capability])
+			])
 		])
 	])
 ])
diff --git a/sys/contrib/openzfs/config/kernel-mkdir.m4 b/sys/contrib/openzfs/config/kernel-mkdir.m4
index 6667ed04fa4c..7407a791b846 100644
--- a/sys/contrib/openzfs/config/kernel-mkdir.m4
+++ b/sys/contrib/openzfs/config/kernel-mkdir.m4
@@ -3,6 +3,22 @@ dnl # Supported mkdir() interfaces checked newest to oldest.
 dnl #
 AC_DEFUN([ZFS_AC_KERNEL_SRC_MKDIR], [
 	dnl #
+	dnl # 6.3 API change
+	dnl # mkdir() takes struct mnt_idmap * as the first arg
+	dnl #
+	ZFS_LINUX_TEST_SRC([mkdir_mnt_idmap], [
+		#include <linux/fs.h>
+
+		int mkdir(struct mnt_idmap *idmap,
+			struct inode *inode, struct dentry *dentry,
+			umode_t umode) { return 0; }
+		static const struct inode_operations
+		    iops __attribute__ ((unused)) = {
+			.mkdir = mkdir,
+		};
+	],[])
+
+	dnl #
 	dnl # 5.12 API change
 	dnl # The struct user_namespace arg was added as the first argument to
 	dnl # mkdir()
@@ -43,25 +59,36 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_MKDIR], [
 
 AC_DEFUN([ZFS_AC_KERNEL_MKDIR], [
 	dnl #
-	dnl # 5.12 API change
-	dnl # The struct user_namespace arg was added as the first argument to
-	dnl # mkdir() of the iops structure.
+	dnl # 6.3 API change
+	dnl # mkdir() takes struct mnt_idmap * as the first arg
 	dnl #
-	AC_MSG_CHECKING([whether iops->mkdir() takes struct user_namespace*])
-	ZFS_LINUX_TEST_RESULT([mkdir_user_namespace], [
+	AC_MSG_CHECKING([whether iops->mkdir() takes struct mnt_idmap*])
+	ZFS_LINUX_TEST_RESULT([mkdir_mnt_idmap], [
 		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_IOPS_MKDIR_USERNS, 1,
-		    [iops->mkdir() takes struct user_namespace*])
+		AC_DEFINE(HAVE_IOPS_MKDIR_IDMAP, 1,
+		    [iops->mkdir() takes struct mnt_idmap*])
 	],[
-		AC_MSG_RESULT(no)
-
-		AC_MSG_CHECKING([whether iops->mkdir() takes umode_t])
-		ZFS_LINUX_TEST_RESULT([inode_operations_mkdir], [
+		dnl #
+		dnl # 5.12 API change
+		dnl # The struct user_namespace arg was added as the first argument to
+		dnl # mkdir() of the iops structure.
+		dnl #
+		AC_MSG_CHECKING([whether iops->mkdir() takes struct user_namespace*])
+		ZFS_LINUX_TEST_RESULT([mkdir_user_namespace], [
 			AC_MSG_RESULT(yes)
-			AC_DEFINE(HAVE_MKDIR_UMODE_T, 1,
-			    [iops->mkdir() takes umode_t])
+			AC_DEFINE(HAVE_IOPS_MKDIR_USERNS, 1,
+			    [iops->mkdir() takes struct user_namespace*])
 		],[
-			ZFS_LINUX_TEST_ERROR([mkdir()])
+			AC_MSG_RESULT(no)
+
+			AC_MSG_CHECKING([whether iops->mkdir() takes umode_t])
+			ZFS_LINUX_TEST_RESULT([inode_operations_mkdir], [
+				AC_MSG_RESULT(yes)
+				AC_DEFINE(HAVE_MKDIR_UMODE_T, 1,
+				    [iops->mkdir() takes umode_t])
+			],[
+				ZFS_LINUX_TEST_ERROR([mkdir()])
+			])
 		])
 	])
 ])
diff --git a/sys/contrib/openzfs/config/kernel-mknod.m4 b/sys/contrib/openzfs/config/kernel-mknod.m4
index ffe45106003a..1494ec1ae4d4 100644
--- a/sys/contrib/openzfs/config/kernel-mknod.m4
+++ b/sys/contrib/openzfs/config/kernel-mknod.m4
@@ -1,5 +1,23 @@
 AC_DEFUN([ZFS_AC_KERNEL_SRC_MKNOD], [
 	dnl #
+	dnl # 6.3 API change
+	dnl # The first arg is now struct mnt_idmap*
+	dnl #
+	ZFS_LINUX_TEST_SRC([mknod_mnt_idmap], [
+		#include <linux/fs.h>
+		#include <linux/sched.h>
+
+		int tmp_mknod(struct mnt_idmap *idmap,
+		    struct inode *inode ,struct dentry *dentry,
+		    umode_t u, dev_t d) { return 0; }
+
+		static const struct inode_operations
+			iops __attribute__ ((unused)) = {
+			.mknod          = tmp_mknod,
+		};
+	],[])
+
+	dnl #
 	dnl # 5.12 API change that added the struct user_namespace* arg
 	dnl # to the front of this function type's arg list.
 	dnl #
@@ -19,12 +37,20 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_MKNOD], [
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_MKNOD], [
-	AC_MSG_CHECKING([whether iops->mknod() takes struct user_namespace*])
-	ZFS_LINUX_TEST_RESULT([mknod_userns], [
+	AC_MSG_CHECKING([whether iops->mknod() takes struct mnt_idmap*])
+	ZFS_LINUX_TEST_RESULT([mknod_mnt_idmap], [
 		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_IOPS_MKNOD_USERNS, 1,
-		    [iops->mknod() takes struct user_namespace*])
+		AC_DEFINE(HAVE_IOPS_MKNOD_IDMAP, 1,
+		    [iops->mknod() takes struct mnt_idmap*])
 	],[
 		AC_MSG_RESULT(no)
+		AC_MSG_CHECKING([whether iops->mknod() takes struct user_namespace*])
+		ZFS_LINUX_TEST_RESULT([mknod_userns], [
+			AC_MSG_RESULT(yes)
+			AC_DEFINE(HAVE_IOPS_MKNOD_USERNS, 1,
+			    [iops->mknod() takes struct user_namespace*])
+		],[
+			AC_MSG_RESULT(no)
+		])
 	])
 ])
diff --git a/sys/contrib/openzfs/config/kernel-reclaim_state.m4 b/sys/contrib/openzfs/config/kernel-reclaim_state.m4
new file mode 100644
index 000000000000..9936b3c1001f
--- /dev/null
+++ b/sys/contrib/openzfs/config/kernel-reclaim_state.m4
@@ -0,0 +1,26 @@
+AC_DEFUN([ZFS_AC_KERNEL_SRC_RECLAIMED], [
+	dnl #
+	dnl # 6.4 API change
+	dnl # The reclaimed_slab of struct reclaim_state
+	dnl # is renamed to reclaimed
+	dnl #
+	ZFS_LINUX_TEST_SRC([reclaim_state_reclaimed], [
+		#include <linux/swap.h>
+		static const struct reclaim_state
+		    rs  __attribute__ ((unused)) = {
+		    .reclaimed = 100,
+		};
+	],[])
+])
+
+AC_DEFUN([ZFS_AC_KERNEL_RECLAIMED], [
+	AC_MSG_CHECKING([whether struct reclaim_state has reclaimed field])
+	ZFS_LINUX_TEST_RESULT([reclaim_state_reclaimed], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_RECLAIM_STATE_RECLAIMED, 1,
+		   [struct reclaim_state has reclaimed])
+	],[
+		AC_MSG_RESULT(no)
+	])
+])
+
diff --git a/sys/contrib/openzfs/config/kernel-rename.m4 b/sys/contrib/openzfs/config/kernel-rename.m4
index 302db43f5748..b33cd0bfb0f6 100644
--- a/sys/contrib/openzfs/config/kernel-rename.m4
+++ b/sys/contrib/openzfs/config/kernel-rename.m4
@@ -33,24 +33,48 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_RENAME], [
 			.rename = rename_fn,
 		};
 	],[])
+
+	dnl #
+	dnl # 6.3 API change - the first arg is now struct mnt_idmap*
+	dnl #
+	ZFS_LINUX_TEST_SRC([inode_operations_rename_mnt_idmap], [
+		#include <linux/fs.h>
+		int rename_fn(struct mnt_idmap *idmap, struct inode *sip,
+			struct dentry *sdp, struct inode *tip, struct dentry *tdp,
+			unsigned int flags) { return 0; }
+
+		static const struct inode_operations
+		    iops __attribute__ ((unused)) = {
+			.rename = rename_fn,
+		};
+	],[])
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_RENAME], [
-	AC_MSG_CHECKING([whether iops->rename() takes struct user_namespace*])
-	ZFS_LINUX_TEST_RESULT([inode_operations_rename_userns], [
+	AC_MSG_CHECKING([whether iops->rename() takes struct mnt_idmap*])
+	ZFS_LINUX_TEST_RESULT([inode_operations_rename_mnt_idmap], [
 		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_IOPS_RENAME_USERNS, 1,
-		    [iops->rename() takes struct user_namespace*])
+		AC_DEFINE(HAVE_IOPS_RENAME_IDMAP, 1,
+		    [iops->rename() takes struct mnt_idmap*])
 	],[
 		AC_MSG_RESULT(no)
 
-		AC_MSG_CHECKING([whether iop->rename() wants flags])
-		ZFS_LINUX_TEST_RESULT([inode_operations_rename_flags], [
+		AC_MSG_CHECKING([whether iops->rename() takes struct user_namespace*])
+		ZFS_LINUX_TEST_RESULT([inode_operations_rename_userns], [
 			AC_MSG_RESULT(yes)
-			AC_DEFINE(HAVE_RENAME_WANTS_FLAGS, 1,
-				[iops->rename() wants flags])
+			AC_DEFINE(HAVE_IOPS_RENAME_USERNS, 1,
+			    [iops->rename() takes struct user_namespace*])
 		],[
 			AC_MSG_RESULT(no)
+
+			AC_MSG_CHECKING([whether iops->rename() wants flags])
+			ZFS_LINUX_TEST_RESULT([inode_operations_rename_flags], [
+				AC_MSG_RESULT(yes)
+				AC_DEFINE(HAVE_RENAME_WANTS_FLAGS, 1,
+					[iops->rename() wants flags])
+			],[
+				AC_MSG_RESULT(no)
+			])
 		])
 	])
 ])
diff --git a/sys/contrib/openzfs/config/kernel-setattr-prepare.m4 b/sys/contrib/openzfs/config/kernel-setattr-prepare.m4
index 24245aa53448..e02d6263e9c9 100644
--- a/sys/contrib/openzfs/config/kernel-setattr-prepare.m4
+++ b/sys/contrib/openzfs/config/kernel-setattr-prepare.m4
@@ -27,26 +27,48 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_SETATTR_PREPARE], [
 		int error __attribute__ ((unused)) =
 			setattr_prepare(userns, dentry, attr);
 	])
+
+	dnl #
+	dnl # 6.3 API change
+	dnl # The first arg of setattr_prepare() is changed to struct mnt_idmap*
+	dnl #
+	ZFS_LINUX_TEST_SRC([setattr_prepare_mnt_idmap], [
+		#include <linux/fs.h>
+	], [
+		struct dentry *dentry = NULL;
+		struct iattr *attr = NULL;
+		struct mnt_idmap *idmap = NULL;
+		int error __attribute__ ((unused)) =
+			setattr_prepare(idmap, dentry, attr);
+	])
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_SETATTR_PREPARE], [
-	AC_MSG_CHECKING([whether setattr_prepare() is available and accepts struct user_namespace*])
-	ZFS_LINUX_TEST_RESULT_SYMBOL([setattr_prepare_userns],
+	AC_MSG_CHECKING([whether setattr_prepare() is available and accepts struct mnt_idmap*])
+	ZFS_LINUX_TEST_RESULT_SYMBOL([setattr_prepare_mnt_idmap],
 	    [setattr_prepare], [fs/attr.c], [
 		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_SETATTR_PREPARE_USERNS, 1,
-		    [setattr_prepare() accepts user_namespace])
+		AC_DEFINE(HAVE_SETATTR_PREPARE_IDMAP, 1,
+		    [setattr_prepare() accepts mnt_idmap])
 	], [
-		AC_MSG_RESULT(no)
-
-		AC_MSG_CHECKING([whether setattr_prepare() is available, doesn't accept user_namespace])
-		ZFS_LINUX_TEST_RESULT_SYMBOL([setattr_prepare],
-			[setattr_prepare], [fs/attr.c], [
+		AC_MSG_CHECKING([whether setattr_prepare() is available and accepts struct user_namespace*])
+		ZFS_LINUX_TEST_RESULT_SYMBOL([setattr_prepare_userns],
+		    [setattr_prepare], [fs/attr.c], [
 			AC_MSG_RESULT(yes)
-			AC_DEFINE(HAVE_SETATTR_PREPARE_NO_USERNS, 1,
-				[setattr_prepare() is available, doesn't accept user_namespace])
+			AC_DEFINE(HAVE_SETATTR_PREPARE_USERNS, 1,
+			    [setattr_prepare() accepts user_namespace])
 		], [
 			AC_MSG_RESULT(no)
+
+			AC_MSG_CHECKING([whether setattr_prepare() is available, doesn't accept user_namespace])
+			ZFS_LINUX_TEST_RESULT_SYMBOL([setattr_prepare],
+				[setattr_prepare], [fs/attr.c], [
+				AC_MSG_RESULT(yes)
+				AC_DEFINE(HAVE_SETATTR_PREPARE_NO_USERNS, 1,
+					[setattr_prepare() is available, doesn't accept user_namespace])
+			], [
+				AC_MSG_RESULT(no)
+			])
 		])
 	])
 ])
diff --git a/sys/contrib/openzfs/config/kernel-symlink.m4 b/sys/contrib/openzfs/config/kernel-symlink.m4
index d90366d04b72..a0333ed66a7c 100644
--- a/sys/contrib/openzfs/config/kernel-symlink.m4
+++ b/sys/contrib/openzfs/config/kernel-symlink.m4
@@ -1,5 +1,21 @@
 AC_DEFUN([ZFS_AC_KERNEL_SRC_SYMLINK], [
 	dnl #
+	dnl # 6.3 API change that changed the first arg
+	dnl # to struct mnt_idmap*
+	dnl #
+	ZFS_LINUX_TEST_SRC([symlink_mnt_idmap], [
+		#include <linux/fs.h>
+		#include <linux/sched.h>
+		int tmp_symlink(struct mnt_idmap *idmap,
+		    struct inode *inode ,struct dentry *dentry,
+		    const char *path) { return 0; }
+
+		static const struct inode_operations
+			iops __attribute__ ((unused)) = {
+			.symlink                = tmp_symlink,
+		};
+	],[])
+	dnl #
 	dnl # 5.12 API change that added the struct user_namespace* arg
 	dnl # to the front of this function type's arg list.
 	dnl #
@@ -19,12 +35,19 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_SYMLINK], [
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_SYMLINK], [
-	AC_MSG_CHECKING([whether iops->symlink() takes struct user_namespace*])
-	ZFS_LINUX_TEST_RESULT([symlink_userns], [
+	AC_MSG_CHECKING([whether iops->symlink() takes struct mnt_idmap*])
+	ZFS_LINUX_TEST_RESULT([symlink_mnt_idmap], [
 		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_IOPS_SYMLINK_USERNS, 1,
-		    [iops->symlink() takes struct user_namespace*])
+		AC_DEFINE(HAVE_IOPS_SYMLINK_IDMAP, 1,
+		    [iops->symlink() takes struct mnt_idmap*])
 	],[
-		AC_MSG_RESULT(no)
+		AC_MSG_CHECKING([whether iops->symlink() takes struct user_namespace*])
+		ZFS_LINUX_TEST_RESULT([symlink_userns], [
+			AC_MSG_RESULT(yes)
+			AC_DEFINE(HAVE_IOPS_SYMLINK_USERNS, 1,
+			    [iops->symlink() takes struct user_namespace*])
+		],[
+			AC_MSG_RESULT(no)
+		])
 	])
 ])
diff --git a/sys/contrib/openzfs/config/kernel-tmpfile.m4 b/sys/contrib/openzfs/config/kernel-tmpfile.m4
index 0e1deb3612f3..cc18b8f65a88 100644
--- a/sys/contrib/openzfs/config/kernel-tmpfile.m4
+++ b/sys/contrib/openzfs/config/kernel-tmpfile.m4
@@ -4,6 +4,19 @@ dnl # Add support for i_op->tmpfile
 dnl #
 AC_DEFUN([ZFS_AC_KERNEL_SRC_TMPFILE], [
 	dnl #
+	dnl # 6.3 API change
+	dnl # The first arg is now struct mnt_idmap * 
+	dnl #
+	ZFS_LINUX_TEST_SRC([inode_operations_tmpfile_mnt_idmap], [
+		#include <linux/fs.h>
+		int tmpfile(struct mnt_idmap *idmap,
+		    struct inode *inode, struct file *file,
+		    umode_t mode) { return 0; }
+		static struct inode_operations
+		    iops __attribute__ ((unused)) = {
+			.tmpfile = tmpfile,
+		};
+	],[])
 	dnl # 6.1 API change
 	dnl # use struct file instead of struct dentry
 	dnl #
@@ -44,23 +57,29 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_TMPFILE], [
 
 AC_DEFUN([ZFS_AC_KERNEL_TMPFILE], [
 	AC_MSG_CHECKING([whether i_op->tmpfile() exists])
-	ZFS_LINUX_TEST_RESULT([inode_operations_tmpfile], [
+	ZFS_LINUX_TEST_RESULT([inode_operations_tmpfile_mnt_idmap], [
 		AC_MSG_RESULT(yes)
 		AC_DEFINE(HAVE_TMPFILE, 1, [i_op->tmpfile() exists])
-		AC_DEFINE(HAVE_TMPFILE_USERNS, 1, [i_op->tmpfile() has userns])
-	],[
-		ZFS_LINUX_TEST_RESULT([inode_operations_tmpfile_dentry_userns], [
+		AC_DEFINE(HAVE_TMPFILE_IDMAP, 1, [i_op->tmpfile() has mnt_idmap])
+	], [
+		ZFS_LINUX_TEST_RESULT([inode_operations_tmpfile], [
 			AC_MSG_RESULT(yes)
 			AC_DEFINE(HAVE_TMPFILE, 1, [i_op->tmpfile() exists])
 			AC_DEFINE(HAVE_TMPFILE_USERNS, 1, [i_op->tmpfile() has userns])
-			AC_DEFINE(HAVE_TMPFILE_DENTRY, 1, [i_op->tmpfile() uses old dentry signature])
 		],[
-			ZFS_LINUX_TEST_RESULT([inode_operations_tmpfile_dentry], [
+			ZFS_LINUX_TEST_RESULT([inode_operations_tmpfile_dentry_userns], [
 				AC_MSG_RESULT(yes)
 				AC_DEFINE(HAVE_TMPFILE, 1, [i_op->tmpfile() exists])
+				AC_DEFINE(HAVE_TMPFILE_USERNS, 1, [i_op->tmpfile() has userns])
 				AC_DEFINE(HAVE_TMPFILE_DENTRY, 1, [i_op->tmpfile() uses old dentry signature])
 			],[
-				ZFS_LINUX_REQUIRE_API([i_op->tmpfile()], [3.11])
+				ZFS_LINUX_TEST_RESULT([inode_operations_tmpfile_dentry], [
+					AC_MSG_RESULT(yes)
+					AC_DEFINE(HAVE_TMPFILE, 1, [i_op->tmpfile() exists])
+					AC_DEFINE(HAVE_TMPFILE_DENTRY, 1, [i_op->tmpfile() uses old dentry signature])
+				],[
+					ZFS_LINUX_REQUIRE_API([i_op->tmpfile()], [3.11])
+				])
 			])
 		])
 	])
diff --git a/sys/contrib/openzfs/config/kernel-writepage_t.m4 b/sys/contrib/openzfs/config/kernel-writepage_t.m4
new file mode 100644
index 000000000000..3a0cffd98570
--- /dev/null
+++ b/sys/contrib/openzfs/config/kernel-writepage_t.m4
@@ -0,0 +1,26 @@
+AC_DEFUN([ZFS_AC_KERNEL_SRC_WRITEPAGE_T], [
+	dnl #
+	dnl # 6.3 API change
+	dnl # The writepage_t function type now has its first argument as
+	dnl # struct folio* instead of struct page*
+	dnl #
+	ZFS_LINUX_TEST_SRC([writepage_t_folio], [
+		#include <linux/writeback.h>
+		int putpage(struct folio *folio,
+		    struct writeback_control *wbc, void *data)
+		{ return 0; }
+		writepage_t func = putpage;
+	],[])
+])
+
+AC_DEFUN([ZFS_AC_KERNEL_WRITEPAGE_T], [
+	AC_MSG_CHECKING([whether int (*writepage_t)() takes struct folio*])
+	ZFS_LINUX_TEST_RESULT([writepage_t_folio], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_WRITEPAGE_T_FOLIO, 1,
+		   [int (*writepage_t)() takes struct folio*])
+	],[
+		AC_MSG_RESULT(no)
+	])
+])
+
diff --git a/sys/contrib/openzfs/config/kernel-xattr-handler.m4 b/sys/contrib/openzfs/config/kernel-xattr-handler.m4
index b6cbfa155007..6b8a08dbcc80 100644
--- a/sys/contrib/openzfs/config/kernel-xattr-handler.m4
+++ b/sys/contrib/openzfs/config/kernel-xattr-handler.m4
@@ -179,6 +179,21 @@ dnl #
 dnl # Supported xattr handler set() interfaces checked newest to oldest.
 dnl #
 AC_DEFUN([ZFS_AC_KERNEL_SRC_XATTR_HANDLER_SET], [
+	ZFS_LINUX_TEST_SRC([xattr_handler_set_mnt_idmap], [
+		#include <linux/xattr.h>
+
+		int set(const struct xattr_handler *handler,
+			struct mnt_idmap *idmap,
+			struct dentry *dentry, struct inode *inode,
+			const char *name, const void *buffer,
+			size_t size, int flags)
+			{ return 0; }
+		static const struct xattr_handler
+			xops __attribute__ ((unused)) = {
+			.set = set,
+		};
+	],[])
+
 	ZFS_LINUX_TEST_SRC([xattr_handler_set_userns], [
 		#include <linux/xattr.h>
 
@@ -240,53 +255,63 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [
 	dnl # The xattr_handler->set() callback was changed to 8 arguments, and
 	dnl # struct user_namespace* was inserted as arg #2
 	dnl #
-	AC_MSG_CHECKING([whether xattr_handler->set() wants dentry, inode, and user_namespace])
-	ZFS_LINUX_TEST_RESULT([xattr_handler_set_userns], [
+	dnl # 6.3 API change,
+	dnl # The xattr_handler->set() callback 2nd arg is now struct mnt_idmap *
+	dnl #
+	AC_MSG_CHECKING([whether xattr_handler->set() wants dentry, inode, and mnt_idmap])
+	ZFS_LINUX_TEST_RESULT([xattr_handler_set_mnt_idmap], [
 		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_XATTR_SET_USERNS, 1,
-		    [xattr_handler->set() takes user_namespace])
-	],[
-		dnl #
-		dnl # 4.7 API change,
-		dnl # The xattr_handler->set() callback was changed to take both
-		dnl # dentry and inode.
-		dnl #
-		AC_MSG_RESULT(no)
-		AC_MSG_CHECKING([whether xattr_handler->set() wants dentry and inode])
-		ZFS_LINUX_TEST_RESULT([xattr_handler_set_dentry_inode], [
+		AC_DEFINE(HAVE_XATTR_SET_IDMAP, 1,
+		    [xattr_handler->set() takes mnt_idmap])
+	], [
+		AC_MSG_CHECKING([whether xattr_handler->set() wants dentry, inode, and user_namespace])
+		ZFS_LINUX_TEST_RESULT([xattr_handler_set_userns], [
 			AC_MSG_RESULT(yes)
-			AC_DEFINE(HAVE_XATTR_SET_DENTRY_INODE, 1,
-			    [xattr_handler->set() wants both dentry and inode])
+			AC_DEFINE(HAVE_XATTR_SET_USERNS, 1,
+			    [xattr_handler->set() takes user_namespace])
 		],[
 			dnl #
-			dnl # 4.4 API change,
-			dnl # The xattr_handler->set() callback was changed to take a
-			dnl # xattr_handler, and handler_flags argument was removed and
-			dnl # should be accessed by handler->flags.
+			dnl # 4.7 API change,
+			dnl # The xattr_handler->set() callback was changed to take both
+			dnl # dentry and inode.
 			dnl #
 			AC_MSG_RESULT(no)
-			AC_MSG_CHECKING(
-			    [whether xattr_handler->set() wants xattr_handler])
-			ZFS_LINUX_TEST_RESULT([xattr_handler_set_xattr_handler], [
+			AC_MSG_CHECKING([whether xattr_handler->set() wants dentry and inode])
+			ZFS_LINUX_TEST_RESULT([xattr_handler_set_dentry_inode], [
 				AC_MSG_RESULT(yes)
-				AC_DEFINE(HAVE_XATTR_SET_HANDLER, 1,
-				    [xattr_handler->set() wants xattr_handler])
+				AC_DEFINE(HAVE_XATTR_SET_DENTRY_INODE, 1,
+				    [xattr_handler->set() wants both dentry and inode])
 			],[
 				dnl #
-				dnl # 2.6.33 API change,
-				dnl # The xattr_handler->set() callback was changed
-				dnl # to take a dentry instead of an inode, and a
-				dnl # handler_flags argument was added.
+				dnl # 4.4 API change,
+				dnl # The xattr_handler->set() callback was changed to take a
+				dnl # xattr_handler, and handler_flags argument was removed and
+				dnl # should be accessed by handler->flags.
 				dnl #
 				AC_MSG_RESULT(no)
 				AC_MSG_CHECKING(
-				    [whether xattr_handler->set() wants dentry])
-				ZFS_LINUX_TEST_RESULT([xattr_handler_set_dentry], [
+				    [whether xattr_handler->set() wants xattr_handler])
+				ZFS_LINUX_TEST_RESULT([xattr_handler_set_xattr_handler], [
 					AC_MSG_RESULT(yes)
-					AC_DEFINE(HAVE_XATTR_SET_DENTRY, 1,
-					    [xattr_handler->set() wants dentry])
+					AC_DEFINE(HAVE_XATTR_SET_HANDLER, 1,
+					    [xattr_handler->set() wants xattr_handler])
 				],[
-					ZFS_LINUX_TEST_ERROR([xattr set()])
+					dnl #
+					dnl # 2.6.33 API change,
+					dnl # The xattr_handler->set() callback was changed
+					dnl # to take a dentry instead of an inode, and a
+					dnl # handler_flags argument was added.
+					dnl #
+					AC_MSG_RESULT(no)
+					AC_MSG_CHECKING(
+					    [whether xattr_handler->set() wants dentry])
+					ZFS_LINUX_TEST_RESULT([xattr_handler_set_dentry], [
+						AC_MSG_RESULT(yes)
+						AC_DEFINE(HAVE_XATTR_SET_DENTRY, 1,
+						    [xattr_handler->set() wants dentry])
+					],[
+						ZFS_LINUX_TEST_ERROR([xattr set()])
+					])
 				])
 			])
 		])
diff --git a/sys/contrib/openzfs/config/kernel.m4 b/sys/contrib/openzfs/config/kernel.m4
index 7806da7a8fc9..173c78a2a561 100644
--- a/sys/contrib/openzfs/config/kernel.m4
+++ b/sys/contrib/openzfs/config/kernel.m4
@@ -69,6 +69,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
 	ZFS_AC_KERNEL_SRC_INODE_OWNER_OR_CAPABLE
 	ZFS_AC_KERNEL_SRC_XATTR
 	ZFS_AC_KERNEL_SRC_ACL
+	ZFS_AC_KERNEL_SRC_INODE_SETATTR
 	ZFS_AC_KERNEL_SRC_INODE_GETATTR
 	ZFS_AC_KERNEL_SRC_INODE_SET_FLAGS
 	ZFS_AC_KERNEL_SRC_INODE_SET_IVERSION
@@ -130,7 +131,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
 	ZFS_AC_KERNEL_SRC_KSTRTOUL
 	ZFS_AC_KERNEL_SRC_PERCPU
 	ZFS_AC_KERNEL_SRC_CPU_HOTPLUG
-	ZFS_AC_KERNEL_SRC_GENERIC_FILLATTR_USERNS
+	ZFS_AC_KERNEL_SRC_GENERIC_FILLATTR
 	ZFS_AC_KERNEL_SRC_MKNOD
 	ZFS_AC_KERNEL_SRC_SYMLINK
 	ZFS_AC_KERNEL_SRC_BIO_MAX_SEGS
@@ -144,6 +145,15 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
 	ZFS_AC_KERNEL_SRC_KTHREAD
 	ZFS_AC_KERNEL_SRC_ZERO_PAGE
 	ZFS_AC_KERNEL_SRC___COPY_FROM_USER_INATOMIC
+	ZFS_AC_KERNEL_SRC_FILEMAP
+	ZFS_AC_KERNEL_SRC_WRITEPAGE_T
+	ZFS_AC_KERNEL_SRC_RECLAIMED
+	case "$host_cpu" in
+		powerpc*)
+			ZFS_AC_KERNEL_SRC_CPU_HAS_FEATURE
+			ZFS_AC_KERNEL_SRC_FLUSH_DCACHE_PAGE
+			;;
+	esac
 
 	AC_MSG_CHECKING([for available kernel interfaces])
 	ZFS_LINUX_TEST_COMPILE_ALL([kabi])
@@ -186,6 +196,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
 	ZFS_AC_KERNEL_INODE_OWNER_OR_CAPABLE
 	ZFS_AC_KERNEL_XATTR
 	ZFS_AC_KERNEL_ACL
+	ZFS_AC_KERNEL_INODE_SETATTR
 	ZFS_AC_KERNEL_INODE_GETATTR
 	ZFS_AC_KERNEL_INODE_SET_FLAGS
 	ZFS_AC_KERNEL_INODE_SET_IVERSION
@@ -247,7 +258,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
 	ZFS_AC_KERNEL_KSTRTOUL
 	ZFS_AC_KERNEL_PERCPU
 	ZFS_AC_KERNEL_CPU_HOTPLUG
-	ZFS_AC_KERNEL_GENERIC_FILLATTR_USERNS
+	ZFS_AC_KERNEL_GENERIC_FILLATTR
 	ZFS_AC_KERNEL_MKNOD
 	ZFS_AC_KERNEL_SYMLINK
 	ZFS_AC_KERNEL_BIO_MAX_SEGS
@@ -261,6 +272,15 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
 	ZFS_AC_KERNEL_KTHREAD
 	ZFS_AC_KERNEL_ZERO_PAGE
 	ZFS_AC_KERNEL___COPY_FROM_USER_INATOMIC
+	ZFS_AC_KERNEL_FILEMAP
+	ZFS_AC_KERNEL_WRITEPAGE_T
+	ZFS_AC_KERNEL_RECLAIMED
+	case "$host_cpu" in
+		powerpc*)
+			ZFS_AC_KERNEL_CPU_HAS_FEATURE
+			ZFS_AC_KERNEL_FLUSH_DCACHE_PAGE
+			;;
+	esac
 ])
 
 dnl #
diff --git a/sys/contrib/openzfs/config/zfs-build.m4 b/sys/contrib/openzfs/config/zfs-build.m4
index 2ab6765c3a30..9390812cd3f1 100644
--- a/sys/contrib/openzfs/config/zfs-build.m4
+++ b/sys/contrib/openzfs/config/zfs-build.m4
@@ -81,7 +81,7 @@ AC_DEFUN([ZFS_AC_DEBUG], [
 AC_DEFUN([ZFS_AC_DEBUGINFO_ENABLE], [
 	DEBUG_CFLAGS="$DEBUG_CFLAGS -g -fno-inline $NO_IPA_SRA"
 
-	KERNEL_DEBUG_CFLAGS="$KERNEL_DEBUG_CFLAGS -fno-inline $NO_IPA_SRA"
+	KERNEL_DEBUG_CFLAGS="$KERNEL_DEBUG_CFLAGS -fno-inline $KERNEL_NO_IPA_SRA"
 	KERNEL_MAKE="$KERNEL_MAKE CONFIG_DEBUG_INFO=y"
 
 	DEBUGINFO_ZFS="_with_debuginfo"
@@ -217,6 +217,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS], [
 	ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_ZERO_LENGTH
 	ZFS_AC_CONFIG_ALWAYS_CC_NO_OMIT_FRAME_POINTER
 	ZFS_AC_CONFIG_ALWAYS_CC_NO_IPA_SRA
+	ZFS_AC_CONFIG_ALWAYS_KERNEL_CC_NO_IPA_SRA
 	ZFS_AC_CONFIG_ALWAYS_CC_ASAN
 	ZFS_AC_CONFIG_ALWAYS_TOOLCHAIN_SIMD
 	ZFS_AC_CONFIG_ALWAYS_SYSTEM
diff --git a/sys/contrib/openzfs/configure.ac b/sys/contrib/openzfs/configure.ac
index 2671434afc72..cb339ccd48a2 100644
--- a/sys/contrib/openzfs/configure.ac
+++ b/sys/contrib/openzfs/configure.ac
@@ -222,6 +222,7 @@ AC_CONFIG_FILES([
 	tests/zfs-tests/cmd/mmap_exec/Makefile
 	tests/zfs-tests/cmd/mmap_libaio/Makefile
 	tests/zfs-tests/cmd/mmap_seek/Makefile
+	tests/zfs-tests/cmd/mmap_sync/Makefile
 	tests/zfs-tests/cmd/mmapwrite/Makefile
 	tests/zfs-tests/cmd/nvlist_to_lua/Makefile
 	tests/zfs-tests/cmd/randfree_file/Makefile
diff --git a/sys/contrib/openzfs/contrib/initramfs/scripts/zfs b/sys/contrib/openzfs/contrib/initramfs/scripts/zfs
index 4ce739fda704..3c51b53eec46 100644
--- a/sys/contrib/openzfs/contrib/initramfs/scripts/zfs
+++ b/sys/contrib/openzfs/contrib/initramfs/scripts/zfs
@@ -326,7 +326,7 @@ mount_fs()
 
 	# Need the _original_ datasets mountpoint!
 	mountpoint=$(get_fs_value "$fs" mountpoint)
-	ZFS_CMD="mount.zfs -o zfsutil"
+	ZFS_CMD="mount -o zfsutil -t zfs"
 	if [ "$mountpoint" = "legacy" ] || [ "$mountpoint" = "none" ]; then
 		# Can't use the mountpoint property. Might be one of our
 		# clones. Check the 'org.zol:mountpoint' property set in
@@ -343,7 +343,7 @@ mount_fs()
 			fi
 			# Don't use mount.zfs -o zfsutils for legacy mountpoint
 			if [ "$mountpoint" = "legacy" ]; then
-				ZFS_CMD="mount.zfs"
+				ZFS_CMD="mount -t zfs"
 			fi
 			# Last hail-mary: Hope 'rootmnt' is set!
 			mountpoint=""
@@ -914,7 +914,7 @@ mountroot()
 		echo "       not specified on the kernel command line."
 		echo ""
 		echo "Manually mount the root filesystem on $rootmnt and then exit."
-		echo "Hint: Try:  mount.zfs -o zfsutil ${ZFS_RPOOL-rpool}/ROOT/system $rootmnt"
+		echo "Hint: Try:  mount -o zfsutil -t zfs ${ZFS_RPOOL-rpool}/ROOT/system $rootmnt"
 		shell
 	fi
 
diff --git a/sys/contrib/openzfs/contrib/pam_zfs_key/pam_zfs_key.c b/sys/contrib/openzfs/contrib/pam_zfs_key/pam_zfs_key.c
index 0db119382e7b..3137037707b5 100644
--- a/sys/contrib/openzfs/contrib/pam_zfs_key/pam_zfs_key.c
+++ b/sys/contrib/openzfs/contrib/pam_zfs_key/pam_zfs_key.c
@@ -548,16 +548,11 @@ zfs_key_config_modify_session_counter(pam_handle_t *pamh,
 		    errno);
 		return (-1);
 	}
-	size_t runtime_path_len = strlen(runtime_path);
-	size_t counter_path_len = runtime_path_len + 1 + 10;
-	char *counter_path = malloc(counter_path_len + 1);
-	if (!counter_path) {
+
+	char *counter_path;
+	if (asprintf(&counter_path, "%s/%u", runtime_path, config->uid) == -1)
 		return (-1);
-	}
-	counter_path[0] = 0;
-	strcat(counter_path, runtime_path);
-	snprintf(counter_path + runtime_path_len, counter_path_len, "/%d",
-	    config->uid);
+
 	const int fd = open(counter_path,
 	    O_RDWR | O_CLOEXEC | O_CREAT | O_NOFOLLOW,
 	    S_IRUSR | S_IWUSR);
diff --git a/sys/contrib/openzfs/include/os/freebsd/zfs/sys/zfs_znode_impl.h b/sys/contrib/openzfs/include/os/freebsd/zfs/sys/zfs_znode_impl.h
index 3d93525b45ab..120884116c16 100644
--- a/sys/contrib/openzfs/include/os/freebsd/zfs/sys/zfs_znode_impl.h
+++ b/sys/contrib/openzfs/include/os/freebsd/zfs/sys/zfs_znode_impl.h
@@ -118,7 +118,8 @@ extern minor_t zfsdev_minor_alloc(void);
 #define	Z_ISLNK(type) ((type) == VLNK)
 #define	Z_ISDIR(type) ((type) == VDIR)
 
-#define	zn_has_cached_data(zp)		vn_has_cached_data(ZTOV(zp))
+#define	zn_has_cached_data(zp, start, end) \
+    vn_has_cached_data(ZTOV(zp))
 #define	zn_flush_cached_data(zp, sync)	vn_flush_cached_data(ZTOV(zp), sync)
 #define	zn_rlimit_fsize(zp, uio) \
     vn_rlimit_fsize(ZTOV(zp), GET_UIO_STRUCT(uio), zfs_uio_td(uio))
diff --git a/sys/contrib/openzfs/include/os/linux/kernel/linux/dcache_compat.h b/sys/contrib/openzfs/include/os/linux/kernel/linux/dcache_compat.h
index c90135fd3818..f87f1653ab4f 100644
--- a/sys/contrib/openzfs/include/os/linux/kernel/linux/dcache_compat.h
+++ b/sys/contrib/openzfs/include/os/linux/kernel/linux/dcache_compat.h
@@ -40,6 +40,21 @@
 #endif
 
 /*
+ * Starting from Linux 5.13, flush_dcache_page() becomes an inline function
+ * and under some configurations, may indirectly referencing GPL-only
+ * cpu_feature_keys on powerpc. Override this function when it is detected
+ * being GPL-only.
+ */
+#if defined __powerpc__ && defined HAVE_FLUSH_DCACHE_PAGE_GPL_ONLY
+#include <linux/simd_powerpc.h>
+#define	flush_dcache_page(page)	do {					\
+		if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE) &&	\
+		    test_bit(PG_dcache_clean, &(page)->flags))		\
+			clear_bit(PG_dcache_clean, &(page)->flags);	\
+	} while (0)
+#endif
+
+/*
  * 2.6.30 API change,
  * The const keyword was added to the 'struct dentry_operations' in
  * the dentry structure.  To handle this we define an appropriate
diff --git a/sys/contrib/openzfs/include/os/linux/kernel/linux/simd_powerpc.h b/sys/contrib/openzfs/include/os/linux/kernel/linux/simd_powerpc.h
index 108cef22f56f..422b85af3ac2 100644
--- a/sys/contrib/openzfs/include/os/linux/kernel/linux/simd_powerpc.h
+++ b/sys/contrib/openzfs/include/os/linux/kernel/linux/simd_powerpc.h
@@ -77,6 +77,17 @@
 #define	kfpu_fini()		((void) 0)
 
 /*
+ * Linux 4.7 makes cpu_has_feature to use jump labels on powerpc if
+ * CONFIG_JUMP_LABEL_FEATURE_CHECKS is enabled, in this case however it
+ * references GPL-only symbol cpu_feature_keys. Therefore we overrides this
+ * interface when it is detected being GPL-only.
+ */
+#if defined(CONFIG_JUMP_LABEL_FEATURE_CHECKS) && \
+    defined(HAVE_CPU_HAS_FEATURE_GPL_ONLY)
+#define	cpu_has_feature(feature)	early_cpu_has_feature(feature)
+#endif
+
+/*
  * Check if AltiVec instruction set is available
  */
 static inline boolean_t
diff --git a/sys/contrib/openzfs/include/os/linux/kernel/linux/vfs_compat.h b/sys/contrib/openzfs/include/os/linux/kernel/linux/vfs_compat.h
index 91e908598fbb..e82bbf755d50 100644
--- a/sys/contrib/openzfs/include/os/linux/kernel/linux/vfs_compat.h
+++ b/sys/contrib/openzfs/include/os/linux/kernel/linux/vfs_compat.h
@@ -344,7 +344,8 @@ static inline void zfs_gid_write(struct inode *ip, gid_t gid)
  * 4.9 API change
  */
 #if !(defined(HAVE_SETATTR_PREPARE_NO_USERNS) || \
-    defined(HAVE_SETATTR_PREPARE_USERNS))
+    defined(HAVE_SETATTR_PREPARE_USERNS) || \
+    defined(HAVE_SETATTR_PREPARE_IDMAP))
 static inline int
 setattr_prepare(struct dentry *dentry, struct iattr *ia)
 {
@@ -399,6 +400,15 @@ func(struct user_namespace *user_ns, const struct path *path,	\
 	return (func##_impl(user_ns, path, stat, request_mask, \
 	    query_flags));	\
 }
+#elif defined(HAVE_IDMAP_IOPS_GETATTR)
+#define	ZPL_GETATTR_WRAPPER(func)					\
+static int								\
+func(struct mnt_idmap *user_ns, const struct path *path,	\
+    struct kstat *stat, u32 request_mask, unsigned int query_flags)	\
+{									\
+	return (func##_impl(user_ns, path, stat, request_mask,	\
+	    query_flags));	\
+}
 #else
 #error
 #endif
@@ -450,8 +460,15 @@ zpl_is_32bit_api(void)
  * 5.12 API change
  * To support id-mapped mounts, generic_fillattr() was modified to
  * accept a new struct user_namespace* as its first arg.
+ *
+ * 6.3 API change
+ * generic_fillattr() first arg is changed to struct mnt_idmap *
+ *
  */
-#ifdef HAVE_GENERIC_FILLATTR_USERNS
+#ifdef HAVE_GENERIC_FILLATTR_IDMAP
+#define	zpl_generic_fillattr(idmap, ip, sp)	\
+    generic_fillattr(idmap, ip, sp)
+#elif defined(HAVE_GENERIC_FILLATTR_USERNS)
 #define	zpl_generic_fillattr(user_ns, ip, sp)	\
     generic_fillattr(user_ns, ip, sp)
 #else
diff --git a/sys/contrib/openzfs/include/os/linux/kernel/linux/xattr_compat.h b/sys/contrib/openzfs/include/os/linux/kernel/linux/xattr_compat.h
index 30403fe87397..3ffd0016911b 100644
--- a/sys/contrib/openzfs/include/os/linux/kernel/linux/xattr_compat.h
+++ b/sys/contrib/openzfs/include/os/linux/kernel/linux/xattr_compat.h
@@ -134,19 +134,34 @@ fn(const struct xattr_handler *handler, struct dentry *dentry,		\
 #endif
 
 /*
+ * 6.3 API change,
+ * The xattr_handler->set() callback was changed to take the
+ * struct mnt_idmap* as the first arg, to support idmapped
+ * mounts.
+ */
+#if defined(HAVE_XATTR_SET_IDMAP)
+#define	ZPL_XATTR_SET_WRAPPER(fn)					\
+static int								\
+fn(const struct xattr_handler *handler, struct mnt_idmap *user_ns,	\
+    struct dentry *dentry, struct inode *inode, const char *name,	\
+    const void *buffer, size_t size, int flags)	\
+{									\
+	return (__ ## fn(user_ns, inode, name, buffer, size, flags));	\
+}
+/*
  * 5.12 API change,
  * The xattr_handler->set() callback was changed to take the
  * struct user_namespace* as the first arg, to support idmapped
  * mounts.
  */
-#if defined(HAVE_XATTR_SET_USERNS)
+#elif defined(HAVE_XATTR_SET_USERNS)
 #define	ZPL_XATTR_SET_WRAPPER(fn)					\
 static int								\
 fn(const struct xattr_handler *handler, struct user_namespace *user_ns, \
     struct dentry *dentry, struct inode *inode, const char *name,	\
     const void *buffer, size_t size, int flags)	\
 {									\
-	return (__ ## fn(inode, name, buffer, size, flags));		\
+	return (__ ## fn(user_ns, inode, name, buffer, size, flags));	\
 }
 /*
  * 4.7 API change,
@@ -160,7 +175,7 @@ fn(const struct xattr_handler *handler, struct dentry *dentry,		\
     struct inode *inode, const char *name, const void *buffer,		\
     size_t size, int flags)						\
 {									\
-	return (__ ## fn(inode, name, buffer, size, flags));		\
+	return (__ ## fn(kcred->user_ns, inode, name, buffer, size, flags));\
 }
 /*
  * 4.4 API change,
@@ -174,7 +189,8 @@ static int								\
 fn(const struct xattr_handler *handler, struct dentry *dentry,		\
     const char *name, const void *buffer, size_t size, int flags)	\
 {									\
-	return (__ ## fn(dentry->d_inode, name, buffer, size, flags));	\
+	return (__ ## fn(kcred->user_ns, dentry->d_inode, name,		\
+	    buffer, size, flags));					\
 }
 /*
  * 2.6.33 API change,
@@ -187,7 +203,8 @@ static int								\
 fn(struct dentry *dentry, const char *name, const void *buffer,		\
     size_t size, int flags, int unused_handler_flags)			\
 {									\
-	return (__ ## fn(dentry->d_inode, name, buffer, size, flags));	\
+	return (__ ## fn(kcred->user_ns, dentry->d_inode, name, buffer, \
+	    size, flags));						\
 }
 #else
 #error "Unsupported kernel"
diff --git a/sys/contrib/openzfs/include/os/linux/spl/sys/cred.h b/sys/contrib/openzfs/include/os/linux/spl/sys/cred.h
index b7d3f38d70bb..501bd4566cb7 100644
--- a/sys/contrib/openzfs/include/os/linux/spl/sys/cred.h
+++ b/sys/contrib/openzfs/include/os/linux/spl/sys/cred.h
@@ -45,6 +45,8 @@ typedef struct cred cred_t;
 #define	SGID_TO_KGID(x)		(KGIDT_INIT(x))
 #define	KGIDP_TO_SGIDP(x)	(&(x)->val)
 
+extern zidmap_t *zfs_get_init_idmap(void);
+
 extern void crhold(cred_t *cr);
 extern void crfree(cred_t *cr);
 extern uid_t crgetuid(const cred_t *cr);
diff --git a/sys/contrib/openzfs/include/os/linux/spl/sys/types.h b/sys/contrib/openzfs/include/os/linux/spl/sys/types.h
index b44c94518750..4d638efbbc32 100644
--- a/sys/contrib/openzfs/include/os/linux/spl/sys/types.h
+++ b/sys/contrib/openzfs/include/os/linux/spl/sys/types.h
@@ -54,4 +54,18 @@ typedef ulong_t			pgcnt_t;
 typedef int			major_t;
 typedef int			minor_t;
 
+struct user_namespace;
+#ifdef HAVE_IOPS_CREATE_IDMAP
+#include <linux/refcount.h>
+struct mnt_idmap {
+	struct user_namespace *owner;
+	refcount_t count;
+};
+typedef struct mnt_idmap	zidmap_t;
+#else
+typedef struct user_namespace	zidmap_t;
+#endif
+
+extern zidmap_t *zfs_init_idmap;
+
 #endif	/* _SPL_TYPES_H */
diff --git a/sys/contrib/openzfs/include/os/linux/zfs/sys/trace_acl.h b/sys/contrib/openzfs/include/os/linux/zfs/sys/trace_acl.h
index 21bcefa4ea26..656552749b9f 100644
--- a/sys/contrib/openzfs/include/os/linux/zfs/sys/trace_acl.h
+++ b/sys/contrib/openzfs/include/os/linux/zfs/sys/trace_acl.h
@@ -58,9 +58,10 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
 	    __field(uint64_t,		z_size)
 	    __field(uint64_t,		z_pflags)
 	    __field(uint32_t,		z_sync_cnt)
+	    __field(uint32_t,		z_sync_writes_cnt)
+	    __field(uint32_t,		z_async_writes_cnt)
 	    __field(mode_t,		z_mode)
 	    __field(boolean_t,		z_is_sa)
-	    __field(boolean_t,		z_is_mapped)
 	    __field(boolean_t,		z_is_ctldir)
 
 	    __field(uint32_t,		i_uid)
@@ -90,9 +91,10 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
 	    __entry->z_size		= zn->z_size;
 	    __entry->z_pflags		= zn->z_pflags;
 	    __entry->z_sync_cnt		= zn->z_sync_cnt;
+	    __entry->z_sync_writes_cnt	= zn->z_sync_writes_cnt;
+	    __entry->z_async_writes_cnt	= zn->z_async_writes_cnt;
 	    __entry->z_mode		= zn->z_mode;
 	    __entry->z_is_sa		= zn->z_is_sa;
-	    __entry->z_is_mapped	= zn->z_is_mapped;
 	    __entry->z_is_ctldir	= zn->z_is_ctldir;
 
 	    __entry->i_uid		= KUID_TO_SUID(ZTOI(zn)->i_uid);
@@ -114,18 +116,18 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
 	TP_printk("zn { id %llu unlinked %u atime_dirty %u "
 	    "zn_prefetch %u blksz %u seq %u "
 	    "mapcnt %llu size %llu pflags %llu "
-	    "sync_cnt %u mode 0x%x is_sa %d "
-	    "is_mapped %d is_ctldir %d inode { "
-	    "uid %u gid %u ino %lu nlink %u size %lli "
+	    "sync_cnt %u sync_writes_cnt %u async_writes_cnt %u "
+	    "mode 0x%x is_sa %d is_ctldir %d "
+	    "inode { uid %u gid %u ino %lu nlink %u size %lli "
 	    "blkbits %u bytes %u mode 0x%x generation %x } } "
 	    "ace { type %u flags %u access_mask %u } mask_matched %u",
 	    __entry->z_id, __entry->z_unlinked, __entry->z_atime_dirty,
 	    __entry->z_zn_prefetch, __entry->z_blksz,
 	    __entry->z_seq, __entry->z_mapcnt, __entry->z_size,
-	    __entry->z_pflags, __entry->z_sync_cnt, __entry->z_mode,
-	    __entry->z_is_sa, __entry->z_is_mapped,
-	    __entry->z_is_ctldir, __entry->i_uid,
-	    __entry->i_gid, __entry->i_ino, __entry->i_nlink,
+	    __entry->z_pflags, __entry->z_sync_cnt,
+	    __entry->z_sync_writes_cnt, __entry->z_async_writes_cnt,
+	    __entry->z_mode, __entry->z_is_sa, __entry->z_is_ctldir,
+	    __entry->i_uid, __entry->i_gid, __entry->i_ino, __entry->i_nlink,
 	    __entry->i_size, __entry->i_blkbits,
 	    __entry->i_bytes, __entry->i_mode, __entry->i_generation,
 	    __entry->z_type, __entry->z_flags, __entry->z_access_mask,
diff --git a/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_vnops_os.h b/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_vnops_os.h
index 47f91e4a6cf4..331f2e2bcc42 100644
--- a/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_vnops_os.h
+++ b/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_vnops_os.h
@@ -54,8 +54,7 @@ extern int zfs_mkdir(znode_t *dzp, char *dirname, vattr_t *vap,
 extern int zfs_rmdir(znode_t *dzp, char *name, znode_t *cwd,
     cred_t *cr, int flags);
 extern int zfs_readdir(struct inode *ip, zpl_dir_context_t *ctx, cred_t *cr);
-extern int zfs_getattr_fast(struct user_namespace *, struct inode *ip,
-	struct kstat *sp);
+extern int zfs_getattr_fast(zidmap_t *, struct inode *ip, struct kstat *sp);
 extern int zfs_setattr(znode_t *zp, vattr_t *vap, int flag, cred_t *cr);
 extern int zfs_rename(znode_t *sdzp, char *snm, znode_t *tdzp,
     char *tnm, cred_t *cr, int flags);
@@ -68,9 +67,9 @@ extern void zfs_inactive(struct inode *ip);
 extern int zfs_space(znode_t *zp, int cmd, flock64_t *bfp, int flag,
     offset_t offset, cred_t *cr);
 extern int zfs_fid(struct inode *ip, fid_t *fidp);
-extern int zfs_getpage(struct inode *ip, struct page *pl[], int nr_pages);
+extern int zfs_getpage(struct inode *ip, struct page *pp);
 extern int zfs_putpage(struct inode *ip, struct page *pp,
-    struct writeback_control *wbc);
+    struct writeback_control *wbc, boolean_t for_sync);
 extern int zfs_dirty_inode(struct inode *ip, int flags);
 extern int zfs_map(struct inode *ip, offset_t off, caddr_t *addrp,
     size_t len, unsigned long vm_flags);
diff --git a/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_znode_impl.h b/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_znode_impl.h
index de46fc8f2bd8..9b9ac7a4f189 100644
--- a/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_znode_impl.h
+++ b/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_znode_impl.h
@@ -47,9 +47,16 @@
 extern "C" {
 #endif
 
+#if defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
 #define	ZNODE_OS_FIELDS			\
 	inode_timespec_t z_btime; /* creation/birth time (cached) */ \
 	struct inode	z_inode;
+#else
+#define	ZNODE_OS_FIELDS			\
+	inode_timespec_t z_btime; /* creation/birth time (cached) */ \
+	struct inode	z_inode;                                     \
+	boolean_t	z_is_mapped;    /* we are mmap'ed */
+#endif
 
 /*
  * Convert between znode pointers and inode pointers
@@ -70,7 +77,14 @@ extern "C" {
 #define	Z_ISDEV(type)	(S_ISCHR(type) || S_ISBLK(type) || S_ISFIFO(type))
 #define	Z_ISDIR(type)	S_ISDIR(type)
 
-#define	zn_has_cached_data(zp)		((zp)->z_is_mapped)
+#if defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
+#define	zn_has_cached_data(zp, start, end) \
+	filemap_range_has_page(ZTOI(zp)->i_mapping, start, end)
+#else
+#define	zn_has_cached_data(zp, start, end) \
+	((zp)->z_is_mapped)
+#endif
+
 #define	zn_flush_cached_data(zp, sync)	write_inode_now(ZTOI(zp), sync)
 #define	zn_rlimit_fsize(zp, uio)	(0)
 
diff --git a/sys/contrib/openzfs/include/os/linux/zfs/sys/zpl.h b/sys/contrib/openzfs/include/os/linux/zfs/sys/zpl.h
index ac9815d4ee00..4e08470e794f 100644
--- a/sys/contrib/openzfs/include/os/linux/zfs/sys/zpl.h
+++ b/sys/contrib/openzfs/include/os/linux/zfs/sys/zpl.h
@@ -64,7 +64,10 @@ extern int zpl_xattr_security_init(struct inode *ip, struct inode *dip,
     const struct qstr *qstr);
 #if defined(CONFIG_FS_POSIX_ACL)
 #if defined(HAVE_SET_ACL)
-#if defined(HAVE_SET_ACL_USERNS)
+#if defined(HAVE_SET_ACL_IDMAP_DENTRY)
+extern int zpl_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+    struct posix_acl *acl, int type);
+#elif defined(HAVE_SET_ACL_USERNS)
 extern int zpl_set_acl(struct user_namespace *userns, struct inode *ip,
     struct posix_acl *acl, int type);
 #elif defined(HAVE_SET_ACL_USERNS_DENTRY_ARG2)
@@ -186,13 +189,15 @@ zpl_dir_emit_dots(struct file *file, zpl_dir_context_t *ctx)
 
 #if defined(HAVE_INODE_OWNER_OR_CAPABLE)
 #define	zpl_inode_owner_or_capable(ns, ip)	inode_owner_or_capable(ip)
-#elif defined(HAVE_INODE_OWNER_OR_CAPABLE_IDMAPPED)
+#elif defined(HAVE_INODE_OWNER_OR_CAPABLE_USERNS)
 #define	zpl_inode_owner_or_capable(ns, ip)	inode_owner_or_capable(ns, ip)
+#elif defined(HAVE_INODE_OWNER_OR_CAPABLE_IDMAP)
+#define	zpl_inode_owner_or_capable(idmap, ip) inode_owner_or_capable(idmap, ip)
 #else
 #error "Unsupported kernel"
 #endif
 
-#ifdef HAVE_SETATTR_PREPARE_USERNS
+#if defined(HAVE_SETATTR_PREPARE_USERNS) || defined(HAVE_SETATTR_PREPARE_IDMAP)
 #define	zpl_setattr_prepare(ns, dentry, ia)	setattr_prepare(ns, dentry, ia)
 #else
 /*
diff --git a/sys/contrib/openzfs/include/sys/dmu.h b/sys/contrib/openzfs/include/sys/dmu.h
index 7bdd42e8bed4..12bd887200e9 100644
--- a/sys/contrib/openzfs/include/sys/dmu.h
+++ b/sys/contrib/openzfs/include/sys/dmu.h
@@ -778,6 +778,9 @@ dmu_tx_t *dmu_tx_create(objset_t *os);
 void dmu_tx_hold_write(dmu_tx_t *tx, uint64_t object, uint64_t off, int len);
 void dmu_tx_hold_write_by_dnode(dmu_tx_t *tx, dnode_t *dn, uint64_t off,
     int len);
+void dmu_tx_hold_append(dmu_tx_t *tx, uint64_t object, uint64_t off, int len);
+void dmu_tx_hold_append_by_dnode(dmu_tx_t *tx, dnode_t *dn, uint64_t off,
+    int len);
 void dmu_tx_hold_free(dmu_tx_t *tx, uint64_t object, uint64_t off,
     uint64_t len);
 void dmu_tx_hold_free_by_dnode(dmu_tx_t *tx, dnode_t *dn, uint64_t off,
diff --git a/sys/contrib/openzfs/include/sys/dmu_objset.h b/sys/contrib/openzfs/include/sys/dmu_objset.h
index 7ade2dc91247..fffcbcfcafd0 100644
--- a/sys/contrib/openzfs/include/sys/dmu_objset.h
+++ b/sys/contrib/openzfs/include/sys/dmu_objset.h
@@ -72,6 +72,10 @@ struct dmu_tx;
  */
 #define	OBJSET_CRYPT_PORTABLE_FLAGS_MASK	(0)
 
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wgnu-variable-sized-type-not-at-end"
+#endif
 typedef struct objset_phys {
 	dnode_phys_t os_meta_dnode;
 	zil_header_t os_zil_header;
@@ -88,6 +92,9 @@ typedef struct objset_phys {
 	char os_pad1[OBJSET_PHYS_SIZE_V3 - OBJSET_PHYS_SIZE_V2 -
 	    sizeof (dnode_phys_t)];
 } objset_phys_t;
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
 
 typedef int (*dmu_objset_upgrade_cb_t)(objset_t *);
 
diff --git a/sys/contrib/openzfs/include/sys/dmu_tx.h b/sys/contrib/openzfs/include/sys/dmu_tx.h
index ad3f1b0e47ca..e8886fd4e6f9 100644
--- a/sys/contrib/openzfs/include/sys/dmu_tx.h
+++ b/sys/contrib/openzfs/include/sys/dmu_tx.h
@@ -90,6 +90,7 @@ enum dmu_tx_hold_type {
 	THT_ZAP,
 	THT_SPACE,
 	THT_SPILL,
+	THT_APPEND,
 	THT_NUMTYPES
 };
 
diff --git a/sys/contrib/openzfs/include/sys/dnode.h b/sys/contrib/openzfs/include/sys/dnode.h
index 20b7c2aaf2be..39bbdae44339 100644
--- a/sys/contrib/openzfs/include/sys/dnode.h
+++ b/sys/contrib/openzfs/include/sys/dnode.h
@@ -120,7 +120,11 @@ extern "C" {
 #define	DN_MAX_LEVELS	(DIV_ROUND_UP(DN_MAX_OFFSET_SHIFT - SPA_MINBLOCKSHIFT, \
 	DN_MIN_INDBLKSHIFT - SPA_BLKPTRSHIFT) + 1)
 
-#define	DN_BONUS(dnp)	((void*)((dnp)->dn_bonus + \
+/*
+ * Use the flexible array instead of the fixed length one dn_bonus
+ * to address memcpy/memmove fortify error
+ */
+#define	DN_BONUS(dnp)	((void*)((dnp)->dn_bonus_flexible + \
 	(((dnp)->dn_nblkptr - 1) * sizeof (blkptr_t))))
 #define	DN_MAX_BONUS_LEN(dnp) \
 	((dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ? \
@@ -266,6 +270,10 @@ typedef struct dnode_phys {
 			    sizeof (blkptr_t)];
 			blkptr_t dn_spill;
 		};
+		struct {
+			blkptr_t __dn_ignore4;
+			uint8_t dn_bonus_flexible[];
+		};
 	};
 } dnode_phys_t;
 
diff --git a/sys/contrib/openzfs/include/sys/fs/zfs.h b/sys/contrib/openzfs/include/sys/fs/zfs.h
index 111e70ece151..84f5aee59d81 100644
--- a/sys/contrib/openzfs/include/sys/fs/zfs.h
+++ b/sys/contrib/openzfs/include/sys/fs/zfs.h
@@ -1173,6 +1173,7 @@ typedef enum pool_initialize_func {
 	POOL_INITIALIZE_START,
 	POOL_INITIALIZE_CANCEL,
 	POOL_INITIALIZE_SUSPEND,
+	POOL_INITIALIZE_UNINIT,
 	POOL_INITIALIZE_FUNCS
 } pool_initialize_func_t;
 
diff --git a/sys/contrib/openzfs/include/sys/spa.h b/sys/contrib/openzfs/include/sys/spa.h
index fedadab459b7..42f7fec0fc1f 100644
--- a/sys/contrib/openzfs/include/sys/spa.h
+++ b/sys/contrib/openzfs/include/sys/spa.h
@@ -785,6 +785,7 @@ extern int bpobj_enqueue_free_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx);
 #define	SPA_ASYNC_L2CACHE_REBUILD		0x800
 #define	SPA_ASYNC_L2CACHE_TRIM			0x1000
 #define	SPA_ASYNC_REBUILD_DONE			0x2000
+#define	SPA_ASYNC_DETACH_SPARE			0x4000
 
 /* device manipulation */
 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
@@ -971,6 +972,8 @@ extern int spa_import_progress_set_state(uint64_t pool_guid,
 /* Pool configuration locks */
 extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
 extern void spa_config_enter(spa_t *spa, int locks, const void *tag, krw_t rw);
+extern void spa_config_enter_mmp(spa_t *spa, int locks, const void *tag,
+    krw_t rw);
 extern void spa_config_exit(spa_t *spa, int locks, const void *tag);
 extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
 
diff --git a/sys/contrib/openzfs/include/sys/vdev_initialize.h b/sys/contrib/openzfs/include/sys/vdev_initialize.h
index 81d39ebebcb2..942fc71c52ae 100644
--- a/sys/contrib/openzfs/include/sys/vdev_initialize.h
+++ b/sys/contrib/openzfs/include/sys/vdev_initialize.h
@@ -33,6 +33,7 @@ extern "C" {
 #endif
 
 extern void vdev_initialize(vdev_t *vd);
+extern void vdev_uninitialize(vdev_t *vd);
 extern void vdev_initialize_stop(vdev_t *vd,
     vdev_initializing_state_t tgt_state, list_t *vd_list);
 extern void vdev_initialize_stop_all(vdev_t *vd,
diff --git a/sys/contrib/openzfs/include/sys/zfs_znode.h b/sys/contrib/openzfs/include/sys/zfs_znode.h
index 0df8a0e4b19a..48dab671dd1c 100644
--- a/sys/contrib/openzfs/include/sys/zfs_znode.h
+++ b/sys/contrib/openzfs/include/sys/zfs_znode.h
@@ -188,7 +188,6 @@ typedef struct znode {
 	boolean_t	z_atime_dirty;	/* atime needs to be synced */
 	boolean_t	z_zn_prefetch;	/* Prefetch znodes? */
 	boolean_t	z_is_sa;	/* are we native sa? */
-	boolean_t	z_is_mapped;	/* are we mmap'ed */
 	boolean_t	z_is_ctldir;	/* are we .zfs entry */
 	boolean_t	z_suspended;	/* extra ref from a suspend? */
 	uint_t		z_blksz;	/* block size in bytes */
@@ -198,6 +197,8 @@ typedef struct znode {
 	uint64_t	z_size;		/* file size (cached) */
 	uint64_t	z_pflags;	/* pflags (cached) */
 	uint32_t	z_sync_cnt;	/* synchronous open count */
+	uint32_t	z_sync_writes_cnt; /* synchronous write count */
+	uint32_t	z_async_writes_cnt; /* asynchronous write count */
 	mode_t		z_mode;		/* mode (cached) */
 	kmutex_t	z_acl_lock;	/* acl data lock */
 	zfs_acl_t	*z_acl_cached;	/* cached acl */
diff --git a/sys/contrib/openzfs/lib/libzfs/libzfs.abi b/sys/contrib/openzfs/lib/libzfs/libzfs.abi
index 13ce19df9b34..58c2d7635f11 100644
--- a/sys/contrib/openzfs/lib/libzfs/libzfs.abi
+++ b/sys/contrib/openzfs/lib/libzfs/libzfs.abi
@@ -5410,7 +5410,8 @@
       <enumerator name='POOL_INITIALIZE_START' value='0'/>
       <enumerator name='POOL_INITIALIZE_CANCEL' value='1'/>
       <enumerator name='POOL_INITIALIZE_SUSPEND' value='2'/>
-      <enumerator name='POOL_INITIALIZE_FUNCS' value='3'/>
+      <enumerator name='POOL_INITIALIZE_UNINIT' value='3'/>
+      <enumerator name='POOL_INITIALIZE_FUNCS' value='4'/>
     </enum-decl>
     <typedef-decl name='pool_initialize_func_t' type-id='5c246ad4' id='7063e1ab'/>
     <enum-decl name='pool_trim_func' id='54ed608a'>
diff --git a/sys/contrib/openzfs/lib/libzfs/libzfs_dataset.c b/sys/contrib/openzfs/lib/libzfs/libzfs_dataset.c
index f2219d1c3d26..f6d844bdfc22 100644
--- a/sys/contrib/openzfs/lib/libzfs/libzfs_dataset.c
+++ b/sys/contrib/openzfs/lib/libzfs/libzfs_dataset.c
@@ -1017,6 +1017,7 @@ zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 	nvlist_t *ret;
 	int chosen_normal = -1;
 	int chosen_utf = -1;
+	int set_maxbs = 0;
 
 	if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
 		(void) no_memory(hdl);
@@ -1234,12 +1235,17 @@ zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 				(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 				goto error;
 			}
+			/* save the ZFS_PROP_RECORDSIZE during create op */
+			if (zpool_hdl == NULL && prop == ZFS_PROP_RECORDSIZE) {
+				set_maxbs = intval;
+			}
 			break;
 		}
 
 		case ZFS_PROP_SPECIAL_SMALL_BLOCKS:
 		{
-			int maxbs = SPA_OLD_MAXBLOCKSIZE;
+			int maxbs =
+			    set_maxbs == 0 ? SPA_OLD_MAXBLOCKSIZE : set_maxbs;
 			char buf[64];
 
 			if (zpool_hdl != NULL) {
diff --git a/sys/contrib/openzfs/lib/libzfs/libzfs_pool.c b/sys/contrib/openzfs/lib/libzfs/libzfs_pool.c
index 29f077841da0..fc6c6e8e2cf6 100644
--- a/sys/contrib/openzfs/lib/libzfs/libzfs_pool.c
+++ b/sys/contrib/openzfs/lib/libzfs/libzfs_pool.c
@@ -2224,8 +2224,8 @@ xlate_init_err(int err)
 }
 
 /*
- * Begin, suspend, or cancel the initialization (initializing of all free
- * blocks) for the given vdevs in the given pool.
+ * Begin, suspend, cancel, or uninit (clear) the initialization (initializing
+ * of all free blocks) for the given vdevs in the given pool.
  */
 static int
 zpool_initialize_impl(zpool_handle_t *zhp, pool_initialize_func_t cmd_type,
@@ -2251,11 +2251,16 @@ zpool_initialize_impl(zpool_handle_t *zhp, pool_initialize_func_t cmd_type,
 	    vdev_guids, &errlist);
 
 	if (err != 0) {
-		if (errlist != NULL) {
-			vd_errlist = fnvlist_lookup_nvlist(errlist,
-			    ZPOOL_INITIALIZE_VDEVS);
+		if (errlist != NULL && nvlist_lookup_nvlist(errlist,
+		    ZPOOL_INITIALIZE_VDEVS, &vd_errlist) == 0) {
 			goto list_errors;
 		}
+
+		if (err == EINVAL && cmd_type == POOL_INITIALIZE_UNINIT) {
+			zfs_error_aux(zhp->zpool_hdl, dgettext(TEXT_DOMAIN,
+			    "uninitialize is not supported by kernel"));
+		}
+
 		(void) zpool_standard_error(zhp->zpool_hdl, err,
 		    dgettext(TEXT_DOMAIN, "operation failed"));
 		goto out;
diff --git a/sys/contrib/openzfs/lib/libzfs_core/libzfs_core.abi b/sys/contrib/openzfs/lib/libzfs_core/libzfs_core.abi
index 1b03a5c42ef4..7ede3e0972d5 100644
--- a/sys/contrib/openzfs/lib/libzfs_core/libzfs_core.abi
+++ b/sys/contrib/openzfs/lib/libzfs_core/libzfs_core.abi
@@ -1726,7 +1726,8 @@
       <enumerator name='POOL_INITIALIZE_START' value='0'/>
       <enumerator name='POOL_INITIALIZE_CANCEL' value='1'/>
       <enumerator name='POOL_INITIALIZE_SUSPEND' value='2'/>
-      <enumerator name='POOL_INITIALIZE_FUNCS' value='3'/>
+      <enumerator name='POOL_INITIALIZE_UNINIT' value='3'/>
+      <enumerator name='POOL_INITIALIZE_FUNCS' value='4'/>
     </enum-decl>
     <typedef-decl name='pool_initialize_func_t' type-id='5c246ad4' id='7063e1ab'/>
     <enum-decl name='pool_trim_func' id='54ed608a'>
diff --git a/sys/contrib/openzfs/man/man4/zfs.4 b/sys/contrib/openzfs/man/man4/zfs.4
index 71a95c3bd812..0c60a9c8e53a 100644
--- a/sys/contrib/openzfs/man/man4/zfs.4
+++ b/sys/contrib/openzfs/man/man4/zfs.4
@@ -1712,7 +1712,7 @@ completes in order to verify the checksums of all blocks which have been
 resilvered.
 This is enabled by default and strongly recommended.
 .
-.It Sy zfs_rebuild_vdev_limit Ns = Ns Sy 33554432 Ns B Po 32MB Pc Pq ulong
+.It Sy zfs_rebuild_vdev_limit Ns = Ns Sy 67108864 Ns B Po 64 MiB Pc Pq ulong
 Maximum amount of I/O that can be concurrently issued for a sequential
 resilver per leaf device, given in bytes.
 .
@@ -1831,6 +1831,13 @@ When we cross this limit from above it is because we are issuing verification I/
 In this case (unless the metadata scan is done) we stop issuing verification I/O
 and start scanning metadata again until we get to the hard limit.
 .
+.It Sy zfs_scan_report_txgs Ns = Ns Sy 0 Ns | Ns 1 Pq uint
+When reporting resilver throughput and estimated completion time use the
+performance observed over roughly the last
+.Sy zfs_scan_report_txgs
+TXGs.
+When set to zero performance is calculated over the time between checkpoints.
+.
 .It Sy zfs_scan_strict_mem_lim Ns = Ns Sy 0 Ns | Ns 1 Pq int
 Enforce tight memory limits on pool scans when a sequential scan is in progress.
 When disabled, the memory limit may be exceeded by fast disks.
@@ -1839,7 +1846,7 @@ When disabled, the memory limit may be exceeded by fast disks.
 Freezes a scrub/resilver in progress without actually pausing it.
 Intended for testing/debugging.
 .
-.It Sy zfs_scan_vdev_limit Ns = Ns Sy 4194304 Ns B Po 4MB Pc Pq int
+.It Sy zfs_scan_vdev_limit Ns = Ns Sy 16777216 Ns B Po 16 MiB Pc Pq int
 Maximum amount of data that can be concurrently issued at once for scrubs and
 resilvers per leaf device, given in bytes.
 .
diff --git a/sys/contrib/openzfs/man/man8/zpool-initialize.8 b/sys/contrib/openzfs/man/man8/zpool-initialize.8
index 0a108180dbbe..ada00bb1be90 100644
--- a/sys/contrib/openzfs/man/man8/zpool-initialize.8
+++ b/sys/contrib/openzfs/man/man8/zpool-initialize.8
@@ -36,7 +36,7 @@
 .Sh SYNOPSIS
 .Nm zpool
 .Cm initialize
-.Op Fl c Ns | Ns Fl s
+.Op Fl c Ns | Ns Fl s | Ns Fl u
 .Op Fl w
 .Ar pool
 .Oo Ar device Oc Ns …
@@ -60,6 +60,14 @@ initialized, the command will fail and no suspension will occur on any device.
 Initializing can then be resumed by running
 .Nm zpool Cm initialize
 with no flags on the relevant target devices.
+.It Fl u , -uninit
+Clears the initialization state on the specified devices, or all eligible
+devices if none are specified.
+If the devices are being actively initialized the command will fail.
+After being cleared
+.Nm zpool Cm initialize
+with no flags can be used to re-initialize all unallocoated regions on
+the relevant target devices.
 .It Fl w , -wait
 Wait until the devices have finished initializing before returning.
 .El
diff --git a/sys/contrib/openzfs/module/Kbuild.in b/sys/contrib/openzfs/module/Kbuild.in
index 1507965c5750..7675d614fa34 100644
--- a/sys/contrib/openzfs/module/Kbuild.in
+++ b/sys/contrib/openzfs/module/Kbuild.in
@@ -44,4 +44,5 @@ endif
 subdir-asflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS)
 subdir-ccflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS)
 
+
 endif
diff --git a/sys/contrib/openzfs/module/icp/algs/edonr/edonr.c b/sys/contrib/openzfs/module/icp/algs/edonr/edonr.c
index 7a3ba30c0582..baf8bb885a6c 100644
--- a/sys/contrib/openzfs/module/icp/algs/edonr/edonr.c
+++ b/sys/contrib/openzfs/module/icp/algs/edonr/edonr.c
@@ -343,9 +343,11 @@ Q256(size_t bitlen, const uint32_t *data, uint32_t *restrict p)
  * which only goes over it by a hair (1248 bytes on ARM32).
  */
 #include <sys/isa_defs.h>	/* for _ILP32 */
-#ifdef _ILP32   /* We're 32-bit, assume small stack frames */
+#if defined(_ILP32)   /* We're 32-bit, assume small stack frames */
+#if defined(__GNUC__) && !defined(__clang__)
 #pragma GCC diagnostic ignored "-Wframe-larger-than="
 #endif
+#endif
 
 #if defined(__IBMC__) && defined(_AIX) && defined(__64BIT__)
 static inline size_t
diff --git a/sys/contrib/openzfs/module/icp/algs/skein/skein_block.c b/sys/contrib/openzfs/module/icp/algs/skein/skein_block.c
index 7ba165a48511..3ad52da5f6a3 100644
--- a/sys/contrib/openzfs/module/icp/algs/skein/skein_block.c
+++ b/sys/contrib/openzfs/module/icp/algs/skein/skein_block.c
@@ -30,7 +30,9 @@
  * the #pragma here to ignore the warning.
  */
 #if defined(_ILP32) || defined(__powerpc)	/* Assume small stack */
+#if defined(__GNUC__) && !defined(__clang__)
 #pragma GCC diagnostic ignored "-Wframe-larger-than="
+#endif
 /*
  * We're running on 32-bit, don't unroll loops to save stack frame space
  *
diff --git a/sys/contrib/openzfs/module/lua/ldo.c b/sys/contrib/openzfs/module/lua/ldo.c
index a9835c4f571d..e4abe04e97d2 100644
--- a/sys/contrib/openzfs/module/lua/ldo.c
+++ b/sys/contrib/openzfs/module/lua/ldo.c
@@ -197,7 +197,8 @@ l_noret luaD_throw (lua_State *L, int errcode) {
   }
 }
 
-#if defined(HAVE_INFINITE_RECURSION)
+#if defined(__GNUC__) && !defined(__clang__) && \
+	defined(HAVE_INFINITE_RECURSION)
 #pragma GCC diagnostic pop
 #endif
 
diff --git a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_ctldir.c b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_ctldir.c
index 6e49fff9a110..cfc4bab2fa96 100644
--- a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_ctldir.c
+++ b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_ctldir.c
@@ -204,6 +204,10 @@ sfs_vgetx(struct mount *mp, int flags, uint64_t parent_id, uint64_t id,
 		return (error);
 	}
 
+#if __FreeBSD_version >= 1400077
+	vn_set_state(vp, VSTATE_CONSTRUCTED);
+#endif
+
 	*vpp = vp;
 	return (0);
 }
@@ -682,7 +686,7 @@ zfsctl_root_readdir(struct vop_readdir_args *ap)
 	 * The check below facilitates the idiom of repeating calls until the
 	 * count to return is 0.
 	 */
-	if (zfs_uio_offset(&uio) == 3 * sizeof(entry)) {
+	if (zfs_uio_offset(&uio) == 3 * sizeof (entry)) {
 		return (0);
 	}
 
@@ -812,6 +816,9 @@ static struct vop_vector zfsctl_ops_root = {
 #if __FreeBSD_version >= 1300121
 	.vop_fplookup_vexec = VOP_EAGAIN,
 #endif
+#if __FreeBSD_version >= 1300139
+	.vop_fplookup_symlink = VOP_EAGAIN,
+#endif
 	.vop_open =	zfsctl_common_open,
 	.vop_close =	zfsctl_common_close,
 	.vop_ioctl =	VOP_EINVAL,
@@ -1138,6 +1145,9 @@ static struct vop_vector zfsctl_ops_snapdir = {
 #if __FreeBSD_version >= 1300121
 	.vop_fplookup_vexec = VOP_EAGAIN,
 #endif
+#if __FreeBSD_version >= 1300139
+	.vop_fplookup_symlink = VOP_EAGAIN,
+#endif
 	.vop_open =	zfsctl_common_open,
 	.vop_close =	zfsctl_common_close,
 	.vop_getattr =	zfsctl_snapdir_getattr,
@@ -1161,7 +1171,7 @@ zfsctl_snapshot_inactive(struct vop_inactive_args *ap)
 {
 	vnode_t *vp = ap->a_vp;
 
-	VERIFY3S(vrecycle(vp), ==, 1);
+	vrecycle(vp);
 	return (0);
 }
 
@@ -1245,6 +1255,11 @@ static struct vop_vector zfsctl_ops_snapshot = {
 #if __FreeBSD_version >= 1300121
 	.vop_fplookup_vexec =	VOP_EAGAIN,
 #endif
+#if __FreeBSD_version >= 1300139
+	.vop_fplookup_symlink = VOP_EAGAIN,
+#endif
+	.vop_open =		zfsctl_common_open,
+	.vop_close =		zfsctl_common_close,
 	.vop_inactive =		zfsctl_snapshot_inactive,
 #if __FreeBSD_version >= 1300045
 	.vop_need_inactive = vop_stdneed_inactive,
diff --git a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_znode.c b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_znode.c
index d26482624678..0ee14a8b5fdf 100644
--- a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_znode.c
+++ b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_znode.c
@@ -153,6 +153,9 @@ zfs_znode_cache_constructor(void *buf, void *arg, int kmflags)
 	zp->z_xattr_cached = NULL;
 	zp->z_xattr_parent = 0;
 	zp->z_vnode = NULL;
+	zp->z_sync_writes_cnt = 0;
+	zp->z_async_writes_cnt = 0;
+
 	return (0);
 }
 
@@ -172,6 +175,9 @@ zfs_znode_cache_destructor(void *buf, void *arg)
 
 	ASSERT3P(zp->z_acl_cached, ==, NULL);
 	ASSERT3P(zp->z_xattr_cached, ==, NULL);
+
+	ASSERT0(atomic_load_32(&zp->z_sync_writes_cnt));
+	ASSERT0(atomic_load_32(&zp->z_async_writes_cnt));
 }
 
 
@@ -457,6 +463,8 @@ zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
 	zp->z_blksz = blksz;
 	zp->z_seq = 0x7A4653;
 	zp->z_sync_cnt = 0;
+	zp->z_sync_writes_cnt = 0;
+	zp->z_async_writes_cnt = 0;
 #if __FreeBSD_version >= 1300139
 	atomic_store_ptr(&zp->z_cached_symlink, NULL);
 #endif
diff --git a/sys/contrib/openzfs/module/os/linux/spl/spl-cred.c b/sys/contrib/openzfs/module/os/linux/spl/spl-cred.c
index f81b9540a639..d407fc66b2de 100644
--- a/sys/contrib/openzfs/module/os/linux/spl/spl-cred.c
+++ b/sys/contrib/openzfs/module/os/linux/spl/spl-cred.c
@@ -145,6 +145,18 @@ crgetgid(const cred_t *cr)
 	return (KGID_TO_SGID(cr->fsgid));
 }
 
+/* Return the initial user ns or nop_mnt_idmap */
+zidmap_t *
+zfs_get_init_idmap(void)
+{
+#ifdef HAVE_IOPS_CREATE_IDMAP
+	return ((zidmap_t *)&nop_mnt_idmap);
+#else
+	return ((zidmap_t *)&init_user_ns);
+#endif
+}
+
+EXPORT_SYMBOL(zfs_get_init_idmap);
 EXPORT_SYMBOL(crhold);
 EXPORT_SYMBOL(crfree);
 EXPORT_SYMBOL(crgetuid);
diff --git a/sys/contrib/openzfs/module/os/linux/spl/spl-generic.c b/sys/contrib/openzfs/module/os/linux/spl/spl-generic.c
index 508fb9d4c7f7..2cb5251d731a 100644
--- a/sys/contrib/openzfs/module/os/linux/spl/spl-generic.c
+++ b/sys/contrib/openzfs/module/os/linux/spl/spl-generic.c
@@ -225,8 +225,10 @@ __div_u64(uint64_t u, uint32_t v)
  * replacements for libgcc-provided functions and will never be called
  * directly.
  */
+#if defined(__GNUC__) && !defined(__clang__)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wmissing-prototypes"
+#endif
 
 /*
  * Implementation of 64-bit unsigned division for 32-bit machines.
@@ -425,7 +427,9 @@ __aeabi_ldivmod(int64_t u, int64_t v)
 EXPORT_SYMBOL(__aeabi_ldivmod);
 #endif /* __arm || __arm__ */
 
+#if defined(__GNUC__) && !defined(__clang__)
 #pragma GCC diagnostic pop
+#endif
 
 #endif /* BITS_PER_LONG */
 
diff --git a/sys/contrib/openzfs/module/os/linux/spl/spl-kmem-cache.c b/sys/contrib/openzfs/module/os/linux/spl/spl-kmem-cache.c
index 5a318e0a5391..d586afa9bee0 100644
--- a/sys/contrib/openzfs/module/os/linux/spl/spl-kmem-cache.c
+++ b/sys/contrib/openzfs/module/os/linux/spl/spl-kmem-cache.c
@@ -183,8 +183,11 @@ kv_free(spl_kmem_cache_t *skc, void *ptr, int size)
 	 * of that infrastructure we are responsible for incrementing it.
 	 */
 	if (current->reclaim_state)
+#ifdef	HAVE_RECLAIM_STATE_RECLAIMED
+		current->reclaim_state->reclaimed += size >> PAGE_SHIFT;
+#else
 		current->reclaim_state->reclaimed_slab += size >> PAGE_SHIFT;
-
+#endif
 	vfree(ptr);
 }
 
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/arc_os.c b/sys/contrib/openzfs/module/os/linux/zfs/arc_os.c
index f96cd1271ee5..fc76fe0e0b5c 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/arc_os.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/arc_os.c
@@ -219,7 +219,11 @@ arc_shrinker_scan(struct shrinker *shrink, struct shrink_control *sc)
 	arc_reduce_target_size(ptob(sc->nr_to_scan));
 	arc_wait_for_eviction(ptob(sc->nr_to_scan), B_FALSE);
 	if (current->reclaim_state != NULL)
+#ifdef	HAVE_RECLAIM_STATE_RECLAIMED
+		current->reclaim_state->reclaimed += sc->nr_to_scan;
+#else
 		current->reclaim_state->reclaimed_slab += sc->nr_to_scan;
+#endif
 
 	/*
 	 * We are experiencing memory pressure which the arc_evict_zthr was
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/policy.c b/sys/contrib/openzfs/module/os/linux/zfs/policy.c
index 5a52092bb90a..8d508bcb4999 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/policy.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/policy.c
@@ -124,7 +124,7 @@ secpolicy_vnode_any_access(const cred_t *cr, struct inode *ip, uid_t owner)
 	if (crgetuid(cr) == owner)
 		return (0);
 
-	if (zpl_inode_owner_or_capable(kcred->user_ns, ip))
+	if (zpl_inode_owner_or_capable(zfs_init_idmap, ip))
 		return (0);
 
 #if defined(CONFIG_USER_NS)
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zfs_ctldir.c b/sys/contrib/openzfs/module/os/linux/zfs/zfs_ctldir.c
index c45644a69153..743b03412a87 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zfs_ctldir.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zfs_ctldir.c
@@ -468,7 +468,9 @@ zfsctl_inode_alloc(zfsvfs_t *zfsvfs, uint64_t id,
 	zp->z_atime_dirty = B_FALSE;
 	zp->z_zn_prefetch = B_FALSE;
 	zp->z_is_sa = B_FALSE;
+#if !defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
 	zp->z_is_mapped = B_FALSE;
+#endif
 	zp->z_is_ctldir = B_TRUE;
 	zp->z_sa_hdl = NULL;
 	zp->z_blksz = 0;
@@ -478,6 +480,8 @@ zfsctl_inode_alloc(zfsvfs_t *zfsvfs, uint64_t id,
 	zp->z_pflags = 0;
 	zp->z_mode = 0;
 	zp->z_sync_cnt = 0;
+	zp->z_sync_writes_cnt = 0;
+	zp->z_async_writes_cnt = 0;
 	ip->i_generation = 0;
 	ip->i_ino = id;
 	ip->i_mode = (S_IFDIR | S_IRWXUGO);
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zfs_ioctl_os.c b/sys/contrib/openzfs/module/os/linux/zfs/zfs_ioctl_os.c
index 79b9d777dc88..767d3a377dcc 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zfs_ioctl_os.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zfs_ioctl_os.c
@@ -288,6 +288,8 @@ zfsdev_detach(void)
 #define	ZFS_DEBUG_STR	""
 #endif
 
+zidmap_t *zfs_init_idmap;
+
 static int __init
 openzfs_init(void)
 {
@@ -311,6 +313,8 @@ openzfs_init(void)
 	printk(KERN_NOTICE "ZFS: Posix ACLs disabled by kernel\n");
 #endif /* CONFIG_FS_POSIX_ACL */
 
+	zfs_init_idmap = (zidmap_t *)zfs_get_init_idmap();
+
 	return (0);
 }
 
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zfs_vfsops.c b/sys/contrib/openzfs/module/os/linux/zfs/zfs_vfsops.c
index da897f120c0b..e620eb43adf2 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zfs_vfsops.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zfs_vfsops.c
@@ -1192,7 +1192,7 @@ zfs_prune_aliases(zfsvfs_t *zfsvfs, unsigned long nr_to_scan)
 	int objects = 0;
 	int i = 0, j = 0;
 
-	zp_array = kmem_zalloc(max_array * sizeof (znode_t *), KM_SLEEP);
+	zp_array = vmem_zalloc(max_array * sizeof (znode_t *), KM_SLEEP);
 
 	mutex_enter(&zfsvfs->z_znodes_lock);
 	while ((zp = list_head(&zfsvfs->z_all_znodes)) != NULL) {
@@ -1228,7 +1228,7 @@ zfs_prune_aliases(zfsvfs_t *zfsvfs, unsigned long nr_to_scan)
 		zrele(zp);
 	}
 
-	kmem_free(zp_array, max_array * sizeof (znode_t *));
+	vmem_free(zp_array, max_array * sizeof (znode_t *));
 
 	return (objects);
 }
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zfs_vnops_os.c b/sys/contrib/openzfs/module/os/linux/zfs/zfs_vnops_os.c
index ae0401e60e54..af0d553d516e 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zfs_vnops_os.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zfs_vnops_os.c
@@ -244,43 +244,46 @@ zfs_close(struct inode *ip, int flag, cred_t *cr)
 }
 
 #if defined(_KERNEL)
+
+static int zfs_fillpage(struct inode *ip, struct page *pp);
+
 /*
  * When a file is memory mapped, we must keep the IO data synchronized
- * between the DMU cache and the memory mapped pages.  What this means:
- *
- * On Write:	If we find a memory mapped page, we write to *both*
- *		the page and the dmu buffer.
+ * between the DMU cache and the memory mapped pages.  Update all mapped
+ * pages with the contents of the coresponding dmu buffer.
  */
 void
 update_pages(znode_t *zp, int64_t start, int len, objset_t *os)
 {
-	struct inode *ip = ZTOI(zp);
-	struct address_space *mp = ip->i_mapping;
-	struct page *pp;
-	uint64_t nbytes;
-	int64_t	off;
-	void *pb;
+	struct address_space *mp = ZTOI(zp)->i_mapping;
+	int64_t off = start & (PAGE_SIZE - 1);
 
-	off = start & (PAGE_SIZE-1);
 	for (start &= PAGE_MASK; len > 0; start += PAGE_SIZE) {
-		nbytes = MIN(PAGE_SIZE - off, len);
+		uint64_t nbytes = MIN(PAGE_SIZE - off, len);
 
-		pp = find_lock_page(mp, start >> PAGE_SHIFT);
+		struct page *pp = find_lock_page(mp, start >> PAGE_SHIFT);
 		if (pp) {
 			if (mapping_writably_mapped(mp))
 				flush_dcache_page(pp);
 
-			pb = kmap(pp);
-			(void) dmu_read(os, zp->z_id, start + off, nbytes,
-			    pb + off, DMU_READ_PREFETCH);
+			void *pb = kmap(pp);
+			int error = dmu_read(os, zp->z_id, start + off,
+			    nbytes, pb + off, DMU_READ_PREFETCH);
 			kunmap(pp);
 
-			if (mapping_writably_mapped(mp))
-				flush_dcache_page(pp);
+			if (error) {
+				SetPageError(pp);
+				ClearPageUptodate(pp);
+			} else {
+				ClearPageError(pp);
+				SetPageUptodate(pp);
+
+				if (mapping_writably_mapped(mp))
+					flush_dcache_page(pp);
+
+				mark_page_accessed(pp);
+			}
 
-			mark_page_accessed(pp);
-			SetPageUptodate(pp);
-			ClearPageError(pp);
 			unlock_page(pp);
 			put_page(pp);
 		}
@@ -291,38 +294,44 @@ update_pages(znode_t *zp, int64_t start, int len, objset_t *os)
 }
 
 /*
- * When a file is memory mapped, we must keep the IO data synchronized
- * between the DMU cache and the memory mapped pages.  What this means:
- *
- * On Read:	We "read" preferentially from memory mapped pages,
- *		else we default from the dmu buffer.
- *
- * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when
- *	 the file is memory mapped.
+ * When a file is memory mapped, we must keep the I/O data synchronized
+ * between the DMU cache and the memory mapped pages.  Preferentially read
+ * from memory mapped pages, otherwise fallback to reading through the dmu.
  */
 int
 mappedread(znode_t *zp, int nbytes, zfs_uio_t *uio)
 {
 	struct inode *ip = ZTOI(zp);
 	struct address_space *mp = ip->i_mapping;
-	struct page *pp;
-	int64_t	start, off;
-	uint64_t bytes;
+	int64_t start = uio->uio_loffset;
+	int64_t off = start & (PAGE_SIZE - 1);
 	int len = nbytes;
 	int error = 0;
-	void *pb;
 
-	start = uio->uio_loffset;
-	off = start & (PAGE_SIZE-1);
 	for (start &= PAGE_MASK; len > 0; start += PAGE_SIZE) {
-		bytes = MIN(PAGE_SIZE - off, len);
+		uint64_t bytes = MIN(PAGE_SIZE - off, len);
 
-		pp = find_lock_page(mp, start >> PAGE_SHIFT);
+		struct page *pp = find_lock_page(mp, start >> PAGE_SHIFT);
 		if (pp) {
-			ASSERT(PageUptodate(pp));
+			/*
+			 * If filemap_fault() retries there exists a window
+			 * where the page will be unlocked and not up to date.
+			 * In this case we must try and fill the page.
+			 */
+			if (unlikely(!PageUptodate(pp))) {
+				error = zfs_fillpage(ip, pp);
+				if (error) {
+					unlock_page(pp);
+					put_page(pp);
+					return (error);
+				}
+			}
+
+			ASSERT(PageUptodate(pp) || PageDirty(pp));
+
 			unlock_page(pp);
 
-			pb = kmap(pp);
+			void *pb = kmap(pp);
 			error = zfs_uiomove(pb + off, bytes, UIO_READ, uio);
 			kunmap(pp);
 
@@ -338,9 +347,11 @@ mappedread(znode_t *zp, int nbytes, zfs_uio_t *uio)
 
 		len -= bytes;
 		off = 0;
+
 		if (error)
 			break;
 	}
+
 	return (error);
 }
 #endif /* _KERNEL */
@@ -1010,7 +1021,7 @@ top:
 
 	mutex_enter(&zp->z_lock);
 	may_delete_now = atomic_read(&ZTOI(zp)->i_count) == 1 &&
-	    !(zp->z_is_mapped);
+	    !zn_has_cached_data(zp, 0, LLONG_MAX);
 	mutex_exit(&zp->z_lock);
 
 	/*
@@ -1098,7 +1109,8 @@ top:
 		    &xattr_obj_unlinked, sizeof (xattr_obj_unlinked));
 		delete_now = may_delete_now && !toobig &&
 		    atomic_read(&ZTOI(zp)->i_count) == 1 &&
-		    !(zp->z_is_mapped) && xattr_obj == xattr_obj_unlinked &&
+		    !zn_has_cached_data(zp, 0, LLONG_MAX) &&
+		    xattr_obj == xattr_obj_unlinked &&
 		    zfs_external_acl(zp) == acl_obj;
 	}
 
@@ -1663,8 +1675,7 @@ out:
  */
 /* ARGSUSED */
 int
-zfs_getattr_fast(struct user_namespace *user_ns, struct inode *ip,
-    struct kstat *sp)
+zfs_getattr_fast(zidmap_t *user_ns, struct inode *ip, struct kstat *sp)
 {
 	znode_t *zp = ITOZ(ip);
 	zfsvfs_t *zfsvfs = ITOZSB(ip);
@@ -3434,21 +3445,34 @@ top:
 }
 
 static void
-zfs_putpage_commit_cb(void *arg)
+zfs_putpage_sync_commit_cb(void *arg)
+{
+	struct page *pp = arg;
+
+	ClearPageError(pp);
+	end_page_writeback(pp);
+}
+
+static void
+zfs_putpage_async_commit_cb(void *arg)
 {
 	struct page *pp = arg;
+	znode_t *zp = ITOZ(pp->mapping->host);
 
 	ClearPageError(pp);
 	end_page_writeback(pp);
+	atomic_dec_32(&zp->z_async_writes_cnt);
 }
 
 /*
  * Push a page out to disk, once the page is on stable storage the
  * registered commit callback will be run as notification of completion.
  *
- *	IN:	ip	- page mapped for inode.
- *		pp	- page to push (page is locked)
- *		wbc	- writeback control data
+ *	IN:	ip	 - page mapped for inode.
+ *		pp	 - page to push (page is locked)
+ *		wbc	 - writeback control data
+ *		for_sync - does the caller intend to wait synchronously for the
+ *			   page writeback to complete?
  *
  *	RETURN:	0 if success
  *		error code if failure
@@ -3458,7 +3482,8 @@ zfs_putpage_commit_cb(void *arg)
  */
 /* ARGSUSED */
 int
-zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc)
+zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc,
+    boolean_t for_sync)
 {
 	znode_t		*zp = ITOZ(ip);
 	zfsvfs_t	*zfsvfs = ITOZSB(ip);
@@ -3556,6 +3581,16 @@ zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc)
 		zfs_rangelock_exit(lr);
 
 		if (wbc->sync_mode != WB_SYNC_NONE) {
+			/*
+			 * Speed up any non-sync page writebacks since
+			 * they may take several seconds to complete.
+			 * Refer to the comment in zpl_fsync() (when
+			 * HAVE_FSYNC_RANGE is defined) for details.
+			 */
+			if (atomic_load_32(&zp->z_async_writes_cnt) > 0) {
+				zil_commit(zfsvfs->z_log, zp->z_id);
+			}
+
 			if (PageWriteback(pp))
 #ifdef HAVE_PAGEMAP_FOLIO_WAIT_BIT
 				folio_wait_bit(page_folio(pp), PG_writeback);
@@ -3581,6 +3616,8 @@ zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc)
 	 * was in fact not skipped and should not be counted as if it were.
 	 */
 	wbc->pages_skipped--;
+	if (!for_sync)
+		atomic_inc_32(&zp->z_async_writes_cnt);
 	set_page_writeback(pp);
 	unlock_page(pp);
 
@@ -3602,6 +3639,8 @@ zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc)
 #endif
 		ClearPageError(pp);
 		end_page_writeback(pp);
+		if (!for_sync)
+			atomic_dec_32(&zp->z_async_writes_cnt);
 		zfs_rangelock_exit(lr);
 		ZFS_EXIT(zfsvfs);
 		return (err);
@@ -3626,7 +3665,9 @@ zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc)
 	err = sa_bulk_update(zp->z_sa_hdl, bulk, cnt, tx);
 
 	zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, pgoff, pglen, 0,
-	    zfs_putpage_commit_cb, pp);
+	    for_sync ? zfs_putpage_sync_commit_cb :
+	    zfs_putpage_async_commit_cb, pp);
+
 	dmu_tx_commit(tx);
 
 	zfs_rangelock_exit(lr);
@@ -3638,6 +3679,16 @@ zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc)
 		 * performance reasons.
 		 */
 		zil_commit(zfsvfs->z_log, zp->z_id);
+	} else if (!for_sync && atomic_load_32(&zp->z_sync_writes_cnt) > 0) {
+		/*
+		 * If the caller does not intend to wait synchronously
+		 * for this page writeback to complete and there are active
+		 * synchronous calls on this file, do a commit so that
+		 * the latter don't accidentally end up waiting for
+		 * our writeback to complete. Refer to the comment in
+		 * zpl_fsync() (when HAVE_FSYNC_RANGE is defined) for details.
+		 */
+		zil_commit(zfsvfs->z_log, zp->z_id);
 	}
 
 	dataset_kstats_update_write_kstats(&zfsvfs->z_kstat, pglen);
@@ -3766,55 +3817,45 @@ zfs_inactive(struct inode *ip)
  * Fill pages with data from the disk.
  */
 static int
-zfs_fillpage(struct inode *ip, struct page *pl[], int nr_pages)
+zfs_fillpage(struct inode *ip, struct page *pp)
 {
-	znode_t *zp = ITOZ(ip);
 	zfsvfs_t *zfsvfs = ITOZSB(ip);
-	objset_t *os;
-	struct page *cur_pp;
-	u_offset_t io_off, total;
-	size_t io_len;
-	loff_t i_size;
-	unsigned page_idx;
-	int err;
+	loff_t i_size = i_size_read(ip);
+	u_offset_t io_off = page_offset(pp);
+	size_t io_len = PAGE_SIZE;
 
-	os = zfsvfs->z_os;
-	io_len = nr_pages << PAGE_SHIFT;
-	i_size = i_size_read(ip);
-	io_off = page_offset(pl[0]);
+	ASSERT3U(io_off, <, i_size);
 
 	if (io_off + io_len > i_size)
 		io_len = i_size - io_off;
 
-	/*
-	 * Iterate over list of pages and read each page individually.
-	 */
-	page_idx = 0;
-	for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) {
-		caddr_t va;
+	void *va = kmap(pp);
+	int error = dmu_read(zfsvfs->z_os, ITOZ(ip)->z_id, io_off,
+	    io_len, va, DMU_READ_PREFETCH);
+	if (io_len != PAGE_SIZE)
+		memset((char *)va + io_len, 0, PAGE_SIZE - io_len);
+	kunmap(pp);
 
-		cur_pp = pl[page_idx++];
-		va = kmap(cur_pp);
-		err = dmu_read(os, zp->z_id, io_off, PAGESIZE, va,
-		    DMU_READ_PREFETCH);
-		kunmap(cur_pp);
-		if (err) {
-			/* convert checksum errors into IO errors */
-			if (err == ECKSUM)
-				err = SET_ERROR(EIO);
-			return (err);
-		}
+	if (error) {
+		/* convert checksum errors into IO errors */
+		if (error == ECKSUM)
+			error = SET_ERROR(EIO);
+
+		SetPageError(pp);
+		ClearPageUptodate(pp);
+	} else {
+		ClearPageError(pp);
+		SetPageUptodate(pp);
 	}
 
-	return (0);
+	return (error);
 }
 
 /*
- * Uses zfs_fillpage to read data from the file and fill the pages.
+ * Uses zfs_fillpage to read data from the file and fill the page.
  *
  *	IN:	ip	 - inode of file to get data from.
- *		pl	 - list of pages to read
- *		nr_pages - number of pages to read
+ *		pp	 - page to read
  *
  *	RETURN:	0 on success, error code on failure.
  *
@@ -3823,24 +3864,22 @@ zfs_fillpage(struct inode *ip, struct page *pl[], int nr_pages)
  */
 /* ARGSUSED */
 int
-zfs_getpage(struct inode *ip, struct page *pl[], int nr_pages)
+zfs_getpage(struct inode *ip, struct page *pp)
 {
-	znode_t	 *zp  = ITOZ(ip);
 	zfsvfs_t *zfsvfs = ITOZSB(ip);
-	int	 err;
-
-	if (pl == NULL)
-		return (0);
+	znode_t *zp = ITOZ(ip);
+	int error;
 
 	ZFS_ENTER(zfsvfs);
 	ZFS_VERIFY_ZP(zp);
 
-	err = zfs_fillpage(ip, pl, nr_pages);
-
-	dataset_kstats_update_read_kstats(&zfsvfs->z_kstat, nr_pages*PAGESIZE);
+	error = zfs_fillpage(ip, pp);
+	if (error == 0)
+		dataset_kstats_update_read_kstats(&zfsvfs->z_kstat, PAGE_SIZE);
 
 	ZFS_EXIT(zfsvfs);
-	return (err);
+
+	return (error);
 }
 
 /*
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zfs_znode.c b/sys/contrib/openzfs/module/os/linux/zfs/zfs_znode.c
index f3475b4d9794..0236b3216394 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zfs_znode.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zfs_znode.c
@@ -134,6 +134,9 @@ zfs_znode_cache_constructor(void *buf, void *arg, int kmflags)
 	zp->z_acl_cached = NULL;
 	zp->z_xattr_cached = NULL;
 	zp->z_xattr_parent = 0;
+	zp->z_sync_writes_cnt = 0;
+	zp->z_async_writes_cnt = 0;
+
 	return (0);
 }
 
@@ -151,9 +154,12 @@ zfs_znode_cache_destructor(void *buf, void *arg)
 	rw_destroy(&zp->z_xattr_lock);
 	zfs_rangelock_fini(&zp->z_rangelock);
 
-	ASSERT(zp->z_dirlocks == NULL);
-	ASSERT(zp->z_acl_cached == NULL);
-	ASSERT(zp->z_xattr_cached == NULL);
+	ASSERT3P(zp->z_dirlocks, ==, NULL);
+	ASSERT3P(zp->z_acl_cached, ==, NULL);
+	ASSERT3P(zp->z_xattr_cached, ==, NULL);
+
+	ASSERT0(atomic_load_32(&zp->z_sync_writes_cnt));
+	ASSERT0(atomic_load_32(&zp->z_async_writes_cnt));
 }
 
 static int
@@ -540,7 +546,9 @@ zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
 	ASSERT3P(zp->z_xattr_cached, ==, NULL);
 	zp->z_unlinked = B_FALSE;
 	zp->z_atime_dirty = B_FALSE;
+#if !defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
 	zp->z_is_mapped = B_FALSE;
+#endif
 	zp->z_is_ctldir = B_FALSE;
 	zp->z_suspended = B_FALSE;
 	zp->z_sa_hdl = NULL;
@@ -549,6 +557,8 @@ zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
 	zp->z_blksz = blksz;
 	zp->z_seq = 0x7A4653;
 	zp->z_sync_cnt = 0;
+	zp->z_sync_writes_cnt = 0;
+	zp->z_async_writes_cnt = 0;
 
 	zfs_znode_sa_init(zfsvfs, zp, db, obj_type, hdl);
 
@@ -1628,7 +1638,7 @@ zfs_free_range(znode_t *zp, uint64_t off, uint64_t len)
 	 * Zero partial page cache entries.  This must be done under a
 	 * range lock in order to keep the ARC and page cache in sync.
 	 */
-	if (zp->z_is_mapped) {
+	if (zn_has_cached_data(zp, off, off + len - 1)) {
 		loff_t first_page, last_page, page_len;
 		loff_t first_page_offset, last_page_offset;
 
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zpl_ctldir.c b/sys/contrib/openzfs/module/os/linux/zfs/zpl_ctldir.c
index 9b526afd0002..cf4da470f25f 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zpl_ctldir.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zpl_ctldir.c
@@ -101,7 +101,11 @@ zpl_root_readdir(struct file *filp, void *dirent, filldir_t filldir)
  */
 /* ARGSUSED */
 static int
-#ifdef HAVE_USERNS_IOPS_GETATTR
+#ifdef HAVE_IDMAP_IOPS_GETATTR
+zpl_root_getattr_impl(struct mnt_idmap *user_ns,
+    const struct path *path, struct kstat *stat, u32 request_mask,
+    unsigned int query_flags)
+#elif defined(HAVE_USERNS_IOPS_GETATTR)
 zpl_root_getattr_impl(struct user_namespace *user_ns,
     const struct path *path, struct kstat *stat, u32 request_mask,
     unsigned int query_flags)
@@ -112,8 +116,14 @@ zpl_root_getattr_impl(const struct path *path, struct kstat *stat,
 {
 	struct inode *ip = path->dentry->d_inode;
 
-#if defined(HAVE_GENERIC_FILLATTR_USERNS) && defined(HAVE_USERNS_IOPS_GETATTR)
+#if (defined(HAVE_USERNS_IOPS_GETATTR) || defined(HAVE_IDMAP_IOPS_GETATTR))
+#ifdef HAVE_GENERIC_FILLATTR_USERNS
 	generic_fillattr(user_ns, ip, stat);
+#elif defined(HAVE_GENERIC_FILLATTR_IDMAP)
+	generic_fillattr(user_ns, ip, stat);
+#else
+	(void) user_ns;
+#endif
 #else
 	generic_fillattr(ip, stat);
 #endif
@@ -304,6 +314,10 @@ static int
 zpl_snapdir_rename2(struct user_namespace *user_ns, struct inode *sdip,
     struct dentry *sdentry, struct inode *tdip, struct dentry *tdentry,
     unsigned int flags)
+#elif defined(HAVE_IOPS_RENAME_IDMAP)
+zpl_snapdir_rename2(struct mnt_idmap *user_ns, struct inode *sdip,
+    struct dentry *sdentry, struct inode *tdip, struct dentry *tdentry,
+    unsigned int flags)
 #else
 zpl_snapdir_rename2(struct inode *sdip, struct dentry *sdentry,
     struct inode *tdip, struct dentry *tdentry, unsigned int flags)
@@ -325,7 +339,9 @@ zpl_snapdir_rename2(struct inode *sdip, struct dentry *sdentry,
 	return (error);
 }
 
-#if !defined(HAVE_RENAME_WANTS_FLAGS) && !defined(HAVE_IOPS_RENAME_USERNS)
+#if (!defined(HAVE_RENAME_WANTS_FLAGS) && \
+	!defined(HAVE_IOPS_RENAME_USERNS) && \
+	!defined(HAVE_IOPS_RENAME_IDMAP))
 static int
 zpl_snapdir_rename(struct inode *sdip, struct dentry *sdentry,
     struct inode *tdip, struct dentry *tdentry)
@@ -352,6 +368,9 @@ static int
 #ifdef HAVE_IOPS_MKDIR_USERNS
 zpl_snapdir_mkdir(struct user_namespace *user_ns, struct inode *dip,
     struct dentry *dentry, umode_t mode)
+#elif defined(HAVE_IOPS_MKDIR_IDMAP)
+zpl_snapdir_mkdir(struct mnt_idmap *user_ns, struct inode *dip,
+    struct dentry *dentry, umode_t mode)
 #else
 zpl_snapdir_mkdir(struct inode *dip, struct dentry *dentry, umode_t mode)
 #endif
@@ -384,7 +403,11 @@ zpl_snapdir_mkdir(struct inode *dip, struct dentry *dentry, umode_t mode)
  */
 /* ARGSUSED */
 static int
-#ifdef HAVE_USERNS_IOPS_GETATTR
+#ifdef HAVE_IDMAP_IOPS_GETATTR
+zpl_snapdir_getattr_impl(struct mnt_idmap *user_ns,
+    const struct path *path, struct kstat *stat, u32 request_mask,
+    unsigned int query_flags)
+#elif defined(HAVE_USERNS_IOPS_GETATTR)
 zpl_snapdir_getattr_impl(struct user_namespace *user_ns,
     const struct path *path, struct kstat *stat, u32 request_mask,
     unsigned int query_flags)
@@ -397,9 +420,15 @@ zpl_snapdir_getattr_impl(const struct path *path, struct kstat *stat,
 	zfsvfs_t *zfsvfs = ITOZSB(ip);
 
 	ZPL_ENTER(zfsvfs);
-#if defined(HAVE_GENERIC_FILLATTR_USERNS) && defined(HAVE_USERNS_IOPS_GETATTR)
+#if (defined(HAVE_USERNS_IOPS_GETATTR) || defined(HAVE_IDMAP_IOPS_GETATTR))
+#ifdef HAVE_GENERIC_FILLATTR_USERNS
+	generic_fillattr(user_ns, ip, stat);
+#elif defined(HAVE_GENERIC_FILLATTR_IDMAP)
 	generic_fillattr(user_ns, ip, stat);
 #else
+	(void) user_ns;
+#endif
+#else
 	generic_fillattr(ip, stat);
 #endif
 
@@ -439,7 +468,9 @@ const struct file_operations zpl_fops_snapdir = {
 const struct inode_operations zpl_ops_snapdir = {
 	.lookup		= zpl_snapdir_lookup,
 	.getattr	= zpl_snapdir_getattr,
-#if defined(HAVE_RENAME_WANTS_FLAGS) || defined(HAVE_IOPS_RENAME_USERNS)
+#if (defined(HAVE_RENAME_WANTS_FLAGS) || \
+	defined(HAVE_IOPS_RENAME_USERNS) || \
+	defined(HAVE_IOPS_RENAME_IDMAP))
 	.rename		= zpl_snapdir_rename2,
 #else
 	.rename		= zpl_snapdir_rename,
@@ -530,6 +561,10 @@ static int
 zpl_shares_getattr_impl(struct user_namespace *user_ns,
     const struct path *path, struct kstat *stat, u32 request_mask,
     unsigned int query_flags)
+#elif defined(HAVE_IDMAP_IOPS_GETATTR)
+zpl_shares_getattr_impl(struct mnt_idmap *user_ns,
+    const struct path *path, struct kstat *stat, u32 request_mask,
+    unsigned int query_flags)
 #else
 zpl_shares_getattr_impl(const struct path *path, struct kstat *stat,
     u32 request_mask, unsigned int query_flags)
@@ -543,9 +578,15 @@ zpl_shares_getattr_impl(const struct path *path, struct kstat *stat,
 	ZPL_ENTER(zfsvfs);
 
 	if (zfsvfs->z_shares_dir == 0) {
-#if defined(HAVE_GENERIC_FILLATTR_USERNS) && defined(HAVE_USERNS_IOPS_GETATTR)
+#if (defined(HAVE_USERNS_IOPS_GETATTR) || defined(HAVE_IDMAP_IOPS_GETATTR))
+#ifdef HAVE_GENERIC_FILLATTR_USERNS
+		generic_fillattr(user_ns, path->dentry->d_inode, stat);
+#elif defined(HAVE_GENERIC_FILLATTR_IDMAP)
 		generic_fillattr(user_ns, path->dentry->d_inode, stat);
 #else
+		(void) user_ns;
+#endif
+#else
 		generic_fillattr(path->dentry->d_inode, stat);
 #endif
 		stat->nlink = stat->size = 2;
@@ -556,7 +597,7 @@ zpl_shares_getattr_impl(const struct path *path, struct kstat *stat,
 
 	error = -zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp);
 	if (error == 0) {
-#if defined(HAVE_GENERIC_FILLATTR_USERNS) && defined(HAVE_USERNS_IOPS_GETATTR)
+#if (defined(HAVE_USERNS_IOPS_GETATTR) || defined(HAVE_IDMAP_IOPS_GETATTR))
 		error = -zfs_getattr_fast(user_ns, ZTOI(dzp), stat);
 #else
 		error = -zfs_getattr_fast(kcred->user_ns, ZTOI(dzp), stat);
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zpl_file.c b/sys/contrib/openzfs/module/os/linux/zfs/zpl_file.c
index 38d2bd147007..d5d354db1670 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zpl_file.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zpl_file.c
@@ -165,17 +165,56 @@ static int
 zpl_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
 {
 	struct inode *inode = filp->f_mapping->host;
+	znode_t *zp = ITOZ(inode);
+	zfsvfs_t *zfsvfs = ITOZSB(inode);
 	cred_t *cr = CRED();
 	int error;
 	fstrans_cookie_t cookie;
 
+	/*
+	 * The variables z_sync_writes_cnt and z_async_writes_cnt work in
+	 * tandem so that sync writes can detect if there are any non-sync
+	 * writes going on and vice-versa. The "vice-versa" part to this logic
+	 * is located in zfs_putpage() where non-sync writes check if there are
+	 * any ongoing sync writes. If any sync and non-sync writes overlap,
+	 * we do a commit to complete the non-sync writes since the latter can
+	 * potentially take several seconds to complete and thus block sync
+	 * writes in the upcoming call to filemap_write_and_wait_range().
+	 */
+	atomic_inc_32(&zp->z_sync_writes_cnt);
+	/*
+	 * If the following check does not detect an overlapping non-sync write
+	 * (say because it's just about to start), then it is guaranteed that
+	 * the non-sync write will detect this sync write. This is because we
+	 * always increment z_sync_writes_cnt / z_async_writes_cnt before doing
+	 * the check on z_async_writes_cnt / z_sync_writes_cnt here and in
+	 * zfs_putpage() respectively.
+	 */
+	if (atomic_load_32(&zp->z_async_writes_cnt) > 0) {
+		ZPL_ENTER(zfsvfs);
+		zil_commit(zfsvfs->z_log, zp->z_id);
+		ZPL_EXIT(zfsvfs);
+	}
+
 	error = filemap_write_and_wait_range(inode->i_mapping, start, end);
+
+	/*
+	 * The sync write is not complete yet but we decrement
+	 * z_sync_writes_cnt since zfs_fsync() increments and decrements
+	 * it internally. If a non-sync write starts just after the decrement
+	 * operation but before we call zfs_fsync(), it may not detect this
+	 * overlapping sync write but it does not matter since we have already
+	 * gone past filemap_write_and_wait_range() and we won't block due to
+	 * the non-sync write.
+	 */
+	atomic_dec_32(&zp->z_sync_writes_cnt);
+
 	if (error)
 		return (error);
 
 	crhold(cr);
 	cookie = spl_fstrans_mark();
-	error = -zfs_fsync(ITOZ(inode), datasync, cr);
+	error = -zfs_fsync(zp, datasync, cr);
 	spl_fstrans_unmark(cookie);
 	crfree(cr);
 	ASSERT3S(error, <=, 0);
@@ -579,7 +618,6 @@ static int
 zpl_mmap(struct file *filp, struct vm_area_struct *vma)
 {
 	struct inode *ip = filp->f_mapping->host;
-	znode_t *zp = ITOZ(ip);
 	int error;
 	fstrans_cookie_t cookie;
 
@@ -594,9 +632,12 @@ zpl_mmap(struct file *filp, struct vm_area_struct *vma)
 	if (error)
 		return (error);
 
+#if !defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
+	znode_t *zp = ITOZ(ip);
 	mutex_enter(&zp->z_lock);
 	zp->z_is_mapped = B_TRUE;
 	mutex_exit(&zp->z_lock);
+#endif
 
 	return (error);
 }
@@ -609,29 +650,16 @@ zpl_mmap(struct file *filp, struct vm_area_struct *vma)
 static inline int
 zpl_readpage_common(struct page *pp)
 {
-	struct inode *ip;
-	struct page *pl[1];
-	int error = 0;
 	fstrans_cookie_t cookie;
 
 	ASSERT(PageLocked(pp));
-	ip = pp->mapping->host;
-	pl[0] = pp;
 
 	cookie = spl_fstrans_mark();
-	error = -zfs_getpage(ip, pl, 1);
+	int error = -zfs_getpage(pp->mapping->host, pp);
 	spl_fstrans_unmark(cookie);
 
-	if (error) {
-		SetPageError(pp);
-		ClearPageUptodate(pp);
-	} else {
-		ClearPageError(pp);
-		SetPageUptodate(pp);
-		flush_dcache_page(pp);
-	}
-
 	unlock_page(pp);
+
 	return (error);
 }
 
@@ -688,19 +716,42 @@ zpl_readahead(struct readahead_control *ractl)
 static int
 zpl_putpage(struct page *pp, struct writeback_control *wbc, void *data)
 {
-	struct address_space *mapping = data;
+	boolean_t *for_sync = data;
 	fstrans_cookie_t cookie;
 
 	ASSERT(PageLocked(pp));
 	ASSERT(!PageWriteback(pp));
 
 	cookie = spl_fstrans_mark();
-	(void) zfs_putpage(mapping->host, pp, wbc);
+	(void) zfs_putpage(pp->mapping->host, pp, wbc, *for_sync);
 	spl_fstrans_unmark(cookie);
 
 	return (0);
 }
 
+#ifdef HAVE_WRITEPAGE_T_FOLIO
+static int
+zpl_putfolio(struct folio *pp, struct writeback_control *wbc, void *data)
+{
+	(void) zpl_putpage(&pp->page, wbc, data);
+	return (0);
+}
+#endif
+
+static inline int
+zpl_write_cache_pages(struct address_space *mapping,
+    struct writeback_control *wbc, void *data)
+{
+	int result;
+
+#ifdef HAVE_WRITEPAGE_T_FOLIO
+	result = write_cache_pages(mapping, wbc, zpl_putfolio, data);
+#else
+	result = write_cache_pages(mapping, wbc, zpl_putpage, data);
+#endif
+	return (result);
+}
+
 static int
 zpl_writepages(struct address_space *mapping, struct writeback_control *wbc)
 {
@@ -722,8 +773,9 @@ zpl_writepages(struct address_space *mapping, struct writeback_control *wbc)
 	 * we run it once in non-SYNC mode so that the ZIL gets all the data,
 	 * and then we commit it all in one go.
 	 */
+	boolean_t for_sync = (sync_mode == WB_SYNC_ALL);
 	wbc->sync_mode = WB_SYNC_NONE;
-	result = write_cache_pages(mapping, wbc, zpl_putpage, mapping);
+	result = zpl_write_cache_pages(mapping, wbc, &for_sync);
 	if (sync_mode != wbc->sync_mode) {
 		ZPL_ENTER(zfsvfs);
 		ZPL_VERIFY_ZP(zp);
@@ -739,7 +791,7 @@ zpl_writepages(struct address_space *mapping, struct writeback_control *wbc)
 		 * details). That being said, this is a no-op in most cases.
 		 */
 		wbc->sync_mode = sync_mode;
-		result = write_cache_pages(mapping, wbc, zpl_putpage, mapping);
+		result = zpl_write_cache_pages(mapping, wbc, &for_sync);
 	}
 	return (result);
 }
@@ -756,7 +808,9 @@ zpl_writepage(struct page *pp, struct writeback_control *wbc)
 	if (ITOZSB(pp->mapping->host)->z_os->os_sync == ZFS_SYNC_ALWAYS)
 		wbc->sync_mode = WB_SYNC_ALL;
 
-	return (zpl_putpage(pp, wbc, pp->mapping));
+	boolean_t for_sync = (wbc->sync_mode == WB_SYNC_ALL);
+
+	return (zpl_putpage(pp, wbc, &for_sync));
 }
 
 /*
@@ -924,7 +978,7 @@ __zpl_ioctl_setflags(struct inode *ip, uint32_t ioctl_flags, xvattr_t *xva)
 	    !capable(CAP_LINUX_IMMUTABLE))
 		return (-EPERM);
 
-	if (!zpl_inode_owner_or_capable(kcred->user_ns, ip))
+	if (!zpl_inode_owner_or_capable(zfs_init_idmap, ip))
 		return (-EACCES);
 
 	xva_init(xva);
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zpl_inode.c b/sys/contrib/openzfs/module/os/linux/zfs/zpl_inode.c
index dd634f70eb75..6efaaf4388c4 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zpl_inode.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zpl_inode.c
@@ -131,6 +131,9 @@ static int
 #ifdef HAVE_IOPS_CREATE_USERNS
 zpl_create(struct user_namespace *user_ns, struct inode *dir,
     struct dentry *dentry, umode_t mode, bool flag)
+#elif defined(HAVE_IOPS_CREATE_IDMAP)
+zpl_create(struct mnt_idmap *user_ns, struct inode *dir,
+    struct dentry *dentry, umode_t mode, bool flag)
 #else
 zpl_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool flag)
 #endif
@@ -174,6 +177,9 @@ static int
 #ifdef HAVE_IOPS_MKNOD_USERNS
 zpl_mknod(struct user_namespace *user_ns, struct inode *dir,
     struct dentry *dentry, umode_t mode,
+#elif defined(HAVE_IOPS_MKNOD_IDMAP)
+zpl_mknod(struct mnt_idmap *user_ns, struct inode *dir,
+    struct dentry *dentry, umode_t mode,
 #else
 zpl_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
 #endif
@@ -224,7 +230,10 @@ zpl_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
 
 #ifdef HAVE_TMPFILE
 static int
-#ifndef HAVE_TMPFILE_DENTRY
+#ifdef HAVE_TMPFILE_IDMAP
+zpl_tmpfile(struct mnt_idmap *userns, struct inode *dir,
+    struct file *file, umode_t mode)
+#elif !defined(HAVE_TMPFILE_DENTRY)
 zpl_tmpfile(struct user_namespace *userns, struct inode *dir,
     struct file *file, umode_t mode)
 #else
@@ -317,6 +326,9 @@ static int
 #ifdef HAVE_IOPS_MKDIR_USERNS
 zpl_mkdir(struct user_namespace *user_ns, struct inode *dir,
     struct dentry *dentry, umode_t mode)
+#elif defined(HAVE_IOPS_MKDIR_IDMAP)
+zpl_mkdir(struct mnt_idmap *user_ns, struct inode *dir,
+    struct dentry *dentry, umode_t mode)
 #else
 zpl_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 #endif
@@ -386,6 +398,10 @@ static int
 zpl_getattr_impl(struct user_namespace *user_ns,
     const struct path *path, struct kstat *stat, u32 request_mask,
     unsigned int query_flags)
+#elif defined(HAVE_IDMAP_IOPS_GETATTR)
+zpl_getattr_impl(struct mnt_idmap *user_ns,
+    const struct path *path, struct kstat *stat, u32 request_mask,
+    unsigned int query_flags)
 #else
 zpl_getattr_impl(const struct path *path, struct kstat *stat, u32 request_mask,
     unsigned int query_flags)
@@ -402,7 +418,7 @@ zpl_getattr_impl(const struct path *path, struct kstat *stat, u32 request_mask,
 	 * XXX query_flags currently ignored.
 	 */
 
-#ifdef HAVE_USERNS_IOPS_GETATTR
+#if (defined(HAVE_USERNS_IOPS_GETATTR) || defined(HAVE_IDMAP_IOPS_GETATTR))
 	error = -zfs_getattr_fast(user_ns, ip, stat);
 #else
 	error = -zfs_getattr_fast(kcred->user_ns, ip, stat);
@@ -441,9 +457,12 @@ zpl_getattr_impl(const struct path *path, struct kstat *stat, u32 request_mask,
 ZPL_GETATTR_WRAPPER(zpl_getattr);
 
 static int
-#ifdef HAVE_SETATTR_PREPARE_USERNS
+#ifdef HAVE_USERNS_IOPS_SETATTR
 zpl_setattr(struct user_namespace *user_ns, struct dentry *dentry,
     struct iattr *ia)
+#elif defined(HAVE_IDMAP_IOPS_SETATTR)
+zpl_setattr(struct mnt_idmap *user_ns, struct dentry *dentry,
+    struct iattr *ia)
 #else
 zpl_setattr(struct dentry *dentry, struct iattr *ia)
 #endif
@@ -454,7 +473,13 @@ zpl_setattr(struct dentry *dentry, struct iattr *ia)
 	int error;
 	fstrans_cookie_t cookie;
 
-	error = zpl_setattr_prepare(kcred->user_ns, dentry, ia);
+#ifdef HAVE_SETATTR_PREPARE_USERNS
+	error = zpl_setattr_prepare(user_ns, dentry, ia);
+#elif defined(HAVE_SETATTR_PREPARE_IDMAP)
+	error = zpl_setattr_prepare(user_ns, dentry, ia);
+#else
+	error = zpl_setattr_prepare(zfs_init_idmap, dentry, ia);
+#endif
 	if (error)
 		return (error);
 
@@ -489,10 +514,14 @@ static int
 #ifdef HAVE_IOPS_RENAME_USERNS
 zpl_rename2(struct user_namespace *user_ns, struct inode *sdip,
     struct dentry *sdentry, struct inode *tdip, struct dentry *tdentry,
-    unsigned int flags)
+    unsigned int rflags)
+#elif defined(HAVE_IOPS_RENAME_IDMAP)
+zpl_rename2(struct mnt_idmap *user_ns, struct inode *sdip,
+    struct dentry *sdentry, struct inode *tdip, struct dentry *tdentry,
+    unsigned int rflags)
 #else
 zpl_rename2(struct inode *sdip, struct dentry *sdentry,
-    struct inode *tdip, struct dentry *tdentry, unsigned int flags)
+    struct inode *tdip, struct dentry *tdentry, unsigned int rflags)
 #endif
 {
 	cred_t *cr = CRED();
@@ -500,7 +529,7 @@ zpl_rename2(struct inode *sdip, struct dentry *sdentry,
 	fstrans_cookie_t cookie;
 
 	/* We don't have renameat2(2) support */
-	if (flags)
+	if (rflags)
 		return (-EINVAL);
 
 	crhold(cr);
@@ -514,7 +543,9 @@ zpl_rename2(struct inode *sdip, struct dentry *sdentry,
 	return (error);
 }
 
-#if !defined(HAVE_RENAME_WANTS_FLAGS) && !defined(HAVE_IOPS_RENAME_USERNS)
+#if !defined(HAVE_IOPS_RENAME_USERNS) && \
+	!defined(HAVE_RENAME_WANTS_FLAGS) && \
+	!defined(HAVE_IOPS_RENAME_IDMAP)
 static int
 zpl_rename(struct inode *sdip, struct dentry *sdentry,
     struct inode *tdip, struct dentry *tdentry)
@@ -527,6 +558,9 @@ static int
 #ifdef HAVE_IOPS_SYMLINK_USERNS
 zpl_symlink(struct user_namespace *user_ns, struct inode *dir,
     struct dentry *dentry, const char *name)
+#elif defined(HAVE_IOPS_SYMLINK_IDMAP)
+zpl_symlink(struct mnt_idmap *user_ns, struct inode *dir,
+    struct dentry *dentry, const char *name)
 #else
 zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name)
 #endif
@@ -745,6 +779,8 @@ const struct inode_operations zpl_dir_inode_operations = {
 	.mknod		= zpl_mknod,
 #if defined(HAVE_RENAME_WANTS_FLAGS) || defined(HAVE_IOPS_RENAME_USERNS)
 	.rename		= zpl_rename2,
+#elif defined(HAVE_IOPS_RENAME_IDMAP)
+	.rename		= zpl_rename2,
 #else
 	.rename		= zpl_rename,
 #endif
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zpl_xattr.c b/sys/contrib/openzfs/module/os/linux/zfs/zpl_xattr.c
index 364cd34c1639..0848176098ea 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zpl_xattr.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zpl_xattr.c
@@ -725,9 +725,11 @@ __zpl_xattr_user_get(struct inode *ip, const char *name,
 ZPL_XATTR_GET_WRAPPER(zpl_xattr_user_get);
 
 static int
-__zpl_xattr_user_set(struct inode *ip, const char *name,
+__zpl_xattr_user_set(zidmap_t *user_ns,
+    struct inode *ip, const char *name,
     const void *value, size_t size, int flags)
 {
+	(void) user_ns;
 	char *xattr_name;
 	int error;
 	/* xattr_resolve_name will do this for us if this is defined */
@@ -794,9 +796,11 @@ __zpl_xattr_trusted_get(struct inode *ip, const char *name,
 ZPL_XATTR_GET_WRAPPER(zpl_xattr_trusted_get);
 
 static int
-__zpl_xattr_trusted_set(struct inode *ip, const char *name,
+__zpl_xattr_trusted_set(zidmap_t *user_ns,
+    struct inode *ip, const char *name,
     const void *value, size_t size, int flags)
 {
+	(void) user_ns;
 	char *xattr_name;
 	int error;
 
@@ -863,9 +867,11 @@ __zpl_xattr_security_get(struct inode *ip, const char *name,
 ZPL_XATTR_GET_WRAPPER(zpl_xattr_security_get);
 
 static int
-__zpl_xattr_security_set(struct inode *ip, const char *name,
+__zpl_xattr_security_set(zidmap_t *user_ns,
+    struct inode *ip, const char *name,
     const void *value, size_t size, int flags)
 {
+	(void) user_ns;
 	char *xattr_name;
 	int error;
 	/* xattr_resolve_name will do this for us if this is defined */
@@ -889,7 +895,7 @@ zpl_xattr_security_init_impl(struct inode *ip, const struct xattr *xattrs,
 	int error = 0;
 
 	for (xattr = xattrs; xattr->name != NULL; xattr++) {
-		error = __zpl_xattr_security_set(ip,
+		error = __zpl_xattr_security_set(NULL, ip,
 		    xattr->name, xattr->value, xattr->value_len, 0);
 
 		if (error < 0)
@@ -1004,6 +1010,9 @@ int
 #ifdef HAVE_SET_ACL_USERNS
 zpl_set_acl(struct user_namespace *userns, struct inode *ip,
     struct posix_acl *acl, int type)
+#elif defined(HAVE_SET_ACL_IDMAP_DENTRY)
+zpl_set_acl(struct mnt_idmap *userns, struct dentry *dentry,
+    struct posix_acl *acl, int type)
 #elif defined(HAVE_SET_ACL_USERNS_DENTRY_ARG2)
 zpl_set_acl(struct user_namespace *userns, struct dentry *dentry,
     struct posix_acl *acl, int type)
@@ -1013,6 +1022,8 @@ zpl_set_acl(struct inode *ip, struct posix_acl *acl, int type)
 {
 #ifdef HAVE_SET_ACL_USERNS_DENTRY_ARG2
 	return (zpl_set_acl_impl(d_inode(dentry), acl, type));
+#elif defined(HAVE_SET_ACL_IDMAP_DENTRY)
+	return (zpl_set_acl_impl(d_inode(dentry), acl, type));
 #else
 	return (zpl_set_acl_impl(ip, acl, type));
 #endif /* HAVE_SET_ACL_USERNS_DENTRY_ARG2 */
@@ -1256,7 +1267,8 @@ __zpl_xattr_acl_get_default(struct inode *ip, const char *name,
 ZPL_XATTR_GET_WRAPPER(zpl_xattr_acl_get_default);
 
 static int
-__zpl_xattr_acl_set_access(struct inode *ip, const char *name,
+__zpl_xattr_acl_set_access(zidmap_t *mnt_ns,
+    struct inode *ip, const char *name,
     const void *value, size_t size, int flags)
 {
 	struct posix_acl *acl;
@@ -1270,8 +1282,14 @@ __zpl_xattr_acl_set_access(struct inode *ip, const char *name,
 	if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIX)
 		return (-EOPNOTSUPP);
 
-	if (!zpl_inode_owner_or_capable(kcred->user_ns, ip))
+#if defined(HAVE_XATTR_SET_USERNS) || defined(HAVE_XATTR_SET_IDMAP)
+	if (!zpl_inode_owner_or_capable(mnt_ns, ip))
+		return (-EPERM);
+#else
+	(void) mnt_ns;
+	if (!zpl_inode_owner_or_capable(zfs_init_idmap, ip))
 		return (-EPERM);
+#endif
 
 	if (value) {
 		acl = zpl_acl_from_xattr(value, size);
@@ -1295,7 +1313,8 @@ __zpl_xattr_acl_set_access(struct inode *ip, const char *name,
 ZPL_XATTR_SET_WRAPPER(zpl_xattr_acl_set_access);
 
 static int
-__zpl_xattr_acl_set_default(struct inode *ip, const char *name,
+__zpl_xattr_acl_set_default(zidmap_t *mnt_ns,
+    struct inode *ip, const char *name,
     const void *value, size_t size, int flags)
 {
 	struct posix_acl *acl;
@@ -1309,8 +1328,14 @@ __zpl_xattr_acl_set_default(struct inode *ip, const char *name,
 	if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIX)
 		return (-EOPNOTSUPP);
 
-	if (!zpl_inode_owner_or_capable(kcred->user_ns, ip))
+#if defined(HAVE_XATTR_SET_USERNS) || defined(HAVE_XATTR_SET_IDMAP)
+	if (!zpl_inode_owner_or_capable(mnt_ns, ip))
+		return (-EPERM);
+#else
+	(void) mnt_ns;
+	if (!zpl_inode_owner_or_capable(zfs_init_idmap, ip))
 		return (-EPERM);
+#endif
 
 	if (value) {
 		acl = zpl_acl_from_xattr(value, size);
diff --git a/sys/contrib/openzfs/module/zcommon/Makefile.in b/sys/contrib/openzfs/module/zcommon/Makefile.in
index ebc538440445..614968a42be9 100644
--- a/sys/contrib/openzfs/module/zcommon/Makefile.in
+++ b/sys/contrib/openzfs/module/zcommon/Makefile.in
@@ -26,3 +26,7 @@ $(MODULE)-$(CONFIG_X86) += zfs_fletcher_intel.o
 $(MODULE)-$(CONFIG_X86) += zfs_fletcher_sse.o
 $(MODULE)-$(CONFIG_X86) += zfs_fletcher_avx512.o
 $(MODULE)-$(CONFIG_ARM64) += zfs_fletcher_aarch64_neon.o
+
+ifeq ($(CONFIG_ARM64),y)
+CFLAGS_REMOVE_zfs_fletcher_aarch64_neon.o += -mgeneral-regs-only
+endif
diff --git a/sys/contrib/openzfs/module/zfs/Makefile.in b/sys/contrib/openzfs/module/zfs/Makefile.in
index 653ea0da9bcc..0e04d7ef0cd2 100644
--- a/sys/contrib/openzfs/module/zfs/Makefile.in
+++ b/sys/contrib/openzfs/module/zfs/Makefile.in
@@ -154,4 +154,9 @@ ifeq ($(CONFIG_ALTIVEC),y)
 $(obj)/vdev_raidz_math_powerpc_altivec.o: c_flags += -maltivec
 endif
 
+ifeq ($(CONFIG_ARM64),y)
+CFLAGS_REMOVE_vdev_raidz_math_aarch64_neon.o += -mgeneral-regs-only
+CFLAGS_REMOVE_vdev_raidz_math_aarch64_neonx2.o += -mgeneral-regs-only
+endif
+
 include $(mfdir)/../os/linux/zfs/Makefile
diff --git a/sys/contrib/openzfs/module/zfs/abd.c b/sys/contrib/openzfs/module/zfs/abd.c
index 8ee8e7e57420..754974a559b6 100644
--- a/sys/contrib/openzfs/module/zfs/abd.c
+++ b/sys/contrib/openzfs/module/zfs/abd.c
@@ -109,7 +109,6 @@ void
 abd_verify(abd_t *abd)
 {
 #ifdef ZFS_DEBUG
-	ASSERT3U(abd->abd_size, >, 0);
 	ASSERT3U(abd->abd_size, <=, SPA_MAXBLOCKSIZE);
 	ASSERT3U(abd->abd_flags, ==, abd->abd_flags & (ABD_FLAG_LINEAR |
 	    ABD_FLAG_OWNER | ABD_FLAG_META | ABD_FLAG_MULTI_ZONE |
@@ -118,6 +117,7 @@ abd_verify(abd_t *abd)
 	IMPLY(abd->abd_parent != NULL, !(abd->abd_flags & ABD_FLAG_OWNER));
 	IMPLY(abd->abd_flags & ABD_FLAG_META, abd->abd_flags & ABD_FLAG_OWNER);
 	if (abd_is_linear(abd)) {
+		ASSERT3U(abd->abd_size, >, 0);
 		ASSERT3P(ABD_LINEAR_BUF(abd), !=, NULL);
 	} else if (abd_is_gang(abd)) {
 		uint_t child_sizes = 0;
@@ -130,6 +130,7 @@ abd_verify(abd_t *abd)
 		}
 		ASSERT3U(abd->abd_size, ==, child_sizes);
 	} else {
+		ASSERT3U(abd->abd_size, >, 0);
 		abd_verify_scatter(abd);
 	}
 #endif
@@ -369,7 +370,20 @@ abd_gang_add_gang(abd_t *pabd, abd_t *cabd, boolean_t free_on_free)
 		 * will retain all the free_on_free settings after being
 		 * added to the parents list.
 		 */
+#ifdef ZFS_DEBUG
+		/*
+		 * If cabd had abd_parent, we have to drop it here.  We can't
+		 * transfer it to pabd, nor we can clear abd_size leaving it.
+		 */
+		if (cabd->abd_parent != NULL) {
+			(void) zfs_refcount_remove_many(
+			    &cabd->abd_parent->abd_children,
+			    cabd->abd_size, cabd);
+			cabd->abd_parent = NULL;
+		}
+#endif
 		pabd->abd_size += cabd->abd_size;
+		cabd->abd_size = 0;
 		list_move_tail(&ABD_GANG(pabd).abd_gang_chain,
 		    &ABD_GANG(cabd).abd_gang_chain);
 		ASSERT(list_is_empty(&ABD_GANG(cabd).abd_gang_chain));
@@ -407,7 +421,6 @@ abd_gang_add(abd_t *pabd, abd_t *cabd, boolean_t free_on_free)
 	 */
 	if (abd_is_gang(cabd)) {
 		ASSERT(!list_link_active(&cabd->abd_gang_link));
-		ASSERT(!list_is_empty(&ABD_GANG(cabd).abd_gang_chain));
 		return (abd_gang_add_gang(pabd, cabd, free_on_free));
 	}
 	ASSERT(!abd_is_gang(cabd));
diff --git a/sys/contrib/openzfs/module/zfs/dmu_recv.c b/sys/contrib/openzfs/module/zfs/dmu_recv.c
index 98ca2b3bcec1..b8161f71027a 100644
--- a/sys/contrib/openzfs/module/zfs/dmu_recv.c
+++ b/sys/contrib/openzfs/module/zfs/dmu_recv.c
@@ -71,6 +71,12 @@ int zfs_recv_write_batch_size = 1024 * 1024;
 static char *dmu_recv_tag = "dmu_recv_tag";
 const char *recv_clone_name = "%recv";
 
+typedef enum {
+	ORNS_NO,
+	ORNS_YES,
+	ORNS_MAYBE
+} or_need_sync_t;
+
 static int receive_read_payload_and_next_header(dmu_recv_cookie_t *ra, int len,
     void *buf);
 
@@ -121,6 +127,9 @@ struct receive_writer_arg {
 	uint8_t or_iv[ZIO_DATA_IV_LEN];
 	uint8_t or_mac[ZIO_DATA_MAC_LEN];
 	boolean_t or_byteorder;
+
+	/* Keep track of DRR_FREEOBJECTS right after DRR_OBJECT_RANGE */
+	or_need_sync_t or_need_sync;
 };
 
 typedef struct dmu_recv_begin_arg {
@@ -1658,10 +1667,22 @@ receive_object(struct receive_writer_arg *rwa, struct drr_object *drro,
 		/* object was freed and we are about to allocate a new one */
 		object_to_hold = DMU_NEW_OBJECT;
 	} else {
+		/*
+		 * If the only record in this range so far was DRR_FREEOBJECTS
+		 * with at least one actually freed object, it's possible that
+		 * the block will now be converted to a hole. We need to wait
+		 * for the txg to sync to prevent races.
+		 */
+		if (rwa->or_need_sync == ORNS_YES)
+			txg_wait_synced(dmu_objset_pool(rwa->os), 0);
+
 		/* object is free and we are about to allocate a new one */
 		object_to_hold = DMU_NEW_OBJECT;
 	}
 
+	/* Only relevant for the first object in the range */
+	rwa->or_need_sync = ORNS_NO;
+
 	/*
 	 * If this is a multi-slot dnode there is a chance that this
 	 * object will expand into a slot that is already used by
@@ -1856,6 +1877,9 @@ receive_freeobjects(struct receive_writer_arg *rwa,
 
 		if (err != 0)
 			return (err);
+
+		if (rwa->or_need_sync == ORNS_MAYBE)
+			rwa->or_need_sync = ORNS_YES;
 	}
 	if (next_err != ESRCH)
 		return (next_err);
@@ -2298,6 +2322,8 @@ receive_object_range(struct receive_writer_arg *rwa,
 	bcopy(drror->drr_mac, rwa->or_mac, ZIO_DATA_MAC_LEN);
 	rwa->or_byteorder = byteorder;
 
+	rwa->or_need_sync = ORNS_MAYBE;
+
 	return (0);
 }
 
diff --git a/sys/contrib/openzfs/module/zfs/dmu_send.c b/sys/contrib/openzfs/module/zfs/dmu_send.c
index cd9ecc07fd5c..0dd1ec210a1d 100644
--- a/sys/contrib/openzfs/module/zfs/dmu_send.c
+++ b/sys/contrib/openzfs/module/zfs/dmu_send.c
@@ -2797,6 +2797,7 @@ dmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok,
 			}
 
 			if (err == 0) {
+				owned = B_TRUE;
 				err = zap_lookup(dspp.dp->dp_meta_objset,
 				    dspp.to_ds->ds_object,
 				    DS_FIELD_RESUME_TOGUID, 8, 1,
@@ -2810,21 +2811,24 @@ dmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok,
 				    sizeof (dspp.saved_toname),
 				    dspp.saved_toname);
 			}
-			if (err != 0)
+			/* Only disown if there was an error in the lookups */
+			if (owned && (err != 0))
 				dsl_dataset_disown(dspp.to_ds, dsflags, FTAG);
 
 			kmem_strfree(name);
 		} else {
 			err = dsl_dataset_own(dspp.dp, tosnap, dsflags,
 			    FTAG, &dspp.to_ds);
+			if (err == 0)
+				owned = B_TRUE;
 		}
-		owned = B_TRUE;
 	} else {
 		err = dsl_dataset_hold_flags(dspp.dp, tosnap, dsflags, FTAG,
 		    &dspp.to_ds);
 	}
 
 	if (err != 0) {
+		/* Note: dsl dataset is not owned at this point */
 		dsl_pool_rele(dspp.dp, FTAG);
 		return (err);
 	}
diff --git a/sys/contrib/openzfs/module/zfs/dmu_tx.c b/sys/contrib/openzfs/module/zfs/dmu_tx.c
index 1eed0526b51d..063934f39493 100644
--- a/sys/contrib/openzfs/module/zfs/dmu_tx.c
+++ b/sys/contrib/openzfs/module/zfs/dmu_tx.c
@@ -291,6 +291,53 @@ dmu_tx_count_write(dmu_tx_hold_t *txh, uint64_t off, uint64_t len)
 }
 
 static void
+dmu_tx_count_append(dmu_tx_hold_t *txh, uint64_t off, uint64_t len)
+{
+	dnode_t *dn = txh->txh_dnode;
+	int err = 0;
+
+	if (len == 0)
+		return;
+
+	(void) zfs_refcount_add_many(&txh->txh_space_towrite, len, FTAG);
+
+	if (dn == NULL)
+		return;
+
+	/*
+	 * For i/o error checking, read the blocks that will be needed
+	 * to perform the append; first level-0 block (if not aligned, i.e.
+	 * if they are partial-block writes), no additional blocks are read.
+	 */
+	if (dn->dn_maxblkid == 0) {
+		if (off < dn->dn_datablksz &&
+		    (off > 0 || len < dn->dn_datablksz)) {
+			err = dmu_tx_check_ioerr(NULL, dn, 0, 0);
+			if (err != 0) {
+				txh->txh_tx->tx_err = err;
+			}
+		}
+	} else {
+		zio_t *zio = zio_root(dn->dn_objset->os_spa,
+		    NULL, NULL, ZIO_FLAG_CANFAIL);
+
+		/* first level-0 block */
+		uint64_t start = off >> dn->dn_datablkshift;
+		if (P2PHASE(off, dn->dn_datablksz) || len < dn->dn_datablksz) {
+			err = dmu_tx_check_ioerr(zio, dn, 0, start);
+			if (err != 0) {
+				txh->txh_tx->tx_err = err;
+			}
+		}
+
+		err = zio_wait(zio);
+		if (err != 0) {
+			txh->txh_tx->tx_err = err;
+		}
+	}
+}
+
+static void
 dmu_tx_count_dnode(dmu_tx_hold_t *txh)
 {
 	(void) zfs_refcount_add_many(&txh->txh_space_towrite,
@@ -331,6 +378,42 @@ dmu_tx_hold_write_by_dnode(dmu_tx_t *tx, dnode_t *dn, uint64_t off, int len)
 }
 
 /*
+ * Should be used when appending to an object and the exact offset is unknown.
+ * The write must occur at or beyond the specified offset.  Only the L0 block
+ * at provided offset will be prefetched.
+ */
+void
+dmu_tx_hold_append(dmu_tx_t *tx, uint64_t object, uint64_t off, int len)
+{
+	dmu_tx_hold_t *txh;
+
+	ASSERT0(tx->tx_txg);
+	ASSERT3U(len, <=, DMU_MAX_ACCESS);
+
+	txh = dmu_tx_hold_object_impl(tx, tx->tx_objset,
+	    object, THT_APPEND, off, DMU_OBJECT_END);
+	if (txh != NULL) {
+		dmu_tx_count_append(txh, off, len);
+		dmu_tx_count_dnode(txh);
+	}
+}
+
+void
+dmu_tx_hold_append_by_dnode(dmu_tx_t *tx, dnode_t *dn, uint64_t off, int len)
+{
+	dmu_tx_hold_t *txh;
+
+	ASSERT0(tx->tx_txg);
+	ASSERT3U(len, <=, DMU_MAX_ACCESS);
+
+	txh = dmu_tx_hold_dnode_impl(tx, dn, THT_APPEND, off, DMU_OBJECT_END);
+	if (txh != NULL) {
+		dmu_tx_count_append(txh, off, len);
+		dmu_tx_count_dnode(txh);
+	}
+}
+
+/*
  * This function marks the transaction as being a "net free".  The end
  * result is that refquotas will be disabled for this transaction, and
  * this transaction will be able to use half of the pool space overhead
@@ -638,6 +721,26 @@ dmu_tx_dirty_buf(dmu_tx_t *tx, dmu_buf_impl_t *db)
 				if (blkid == 0)
 					match_offset = TRUE;
 				break;
+			case THT_APPEND:
+				if (blkid >= beginblk && (blkid <= endblk ||
+				    txh->txh_arg2 == DMU_OBJECT_END))
+					match_offset = TRUE;
+
+				/*
+				 * THT_WRITE used for bonus and spill blocks.
+				 */
+				ASSERT(blkid != DMU_BONUS_BLKID &&
+				    blkid != DMU_SPILL_BLKID);
+
+				/*
+				 * They might have to increase nlevels,
+				 * thus dirtying the new TLIBs.  Or the
+				 * might have to change the block size,
+				 * thus dirying the new lvl=0 blk=0.
+				 */
+				if (blkid == 0)
+					match_offset = TRUE;
+				break;
 			case THT_FREE:
 				/*
 				 * We will dirty all the level 1 blocks in
@@ -1421,6 +1524,8 @@ dmu_tx_fini(void)
 EXPORT_SYMBOL(dmu_tx_create);
 EXPORT_SYMBOL(dmu_tx_hold_write);
 EXPORT_SYMBOL(dmu_tx_hold_write_by_dnode);
+EXPORT_SYMBOL(dmu_tx_hold_append);
+EXPORT_SYMBOL(dmu_tx_hold_append_by_dnode);
 EXPORT_SYMBOL(dmu_tx_hold_free);
 EXPORT_SYMBOL(dmu_tx_hold_free_by_dnode);
 EXPORT_SYMBOL(dmu_tx_hold_zap);
diff --git a/sys/contrib/openzfs/module/zfs/dsl_deadlist.c b/sys/contrib/openzfs/module/zfs/dsl_deadlist.c
index d5fe2ee56804..9827eb14728d 100644
--- a/sys/contrib/openzfs/module/zfs/dsl_deadlist.c
+++ b/sys/contrib/openzfs/module/zfs/dsl_deadlist.c
@@ -859,7 +859,7 @@ void
 dsl_deadlist_merge(dsl_deadlist_t *dl, uint64_t obj, dmu_tx_t *tx)
 {
 	zap_cursor_t zc, pzc;
-	zap_attribute_t za, pza;
+	zap_attribute_t *za, *pza;
 	dmu_buf_t *bonus;
 	dsl_deadlist_phys_t *dlp;
 	dmu_object_info_t doi;
@@ -874,28 +874,31 @@ dsl_deadlist_merge(dsl_deadlist_t *dl, uint64_t obj, dmu_tx_t *tx)
 		return;
 	}
 
+	za = kmem_alloc(sizeof (*za), KM_SLEEP);
+	pza = kmem_alloc(sizeof (*pza), KM_SLEEP);
+
 	mutex_enter(&dl->dl_lock);
 	/*
 	 * Prefetch up to 128 deadlists first and then more as we progress.
 	 * The limit is a balance between ARC use and diminishing returns.
 	 */
 	for (zap_cursor_init(&pzc, dl->dl_os, obj), i = 0;
-	    (perror = zap_cursor_retrieve(&pzc, &pza)) == 0 && i < 128;
+	    (perror = zap_cursor_retrieve(&pzc, pza)) == 0 && i < 128;
 	    zap_cursor_advance(&pzc), i++) {
-		dsl_deadlist_prefetch_bpobj(dl, pza.za_first_integer,
-		    zfs_strtonum(pza.za_name, NULL));
+		dsl_deadlist_prefetch_bpobj(dl, pza->za_first_integer,
+		    zfs_strtonum(pza->za_name, NULL));
 	}
 	for (zap_cursor_init(&zc, dl->dl_os, obj);
-	    (error = zap_cursor_retrieve(&zc, &za)) == 0;
+	    (error = zap_cursor_retrieve(&zc, za)) == 0;
 	    zap_cursor_advance(&zc)) {
-		uint64_t mintxg = zfs_strtonum(za.za_name, NULL);
-		dsl_deadlist_insert_bpobj(dl, za.za_first_integer, mintxg, tx);
+		uint64_t mintxg = zfs_strtonum(za->za_name, NULL);
+		dsl_deadlist_insert_bpobj(dl, za->za_first_integer, mintxg, tx);
 		VERIFY0(zap_remove_int(dl->dl_os, obj, mintxg, tx));
 		if (perror == 0) {
-			dsl_deadlist_prefetch_bpobj(dl, pza.za_first_integer,
-			    zfs_strtonum(pza.za_name, NULL));
+			dsl_deadlist_prefetch_bpobj(dl, pza->za_first_integer,
+			    zfs_strtonum(pza->za_name, NULL));
 			zap_cursor_advance(&pzc);
-			perror = zap_cursor_retrieve(&pzc, &pza);
+			perror = zap_cursor_retrieve(&pzc, pza);
 		}
 	}
 	VERIFY3U(error, ==, ENOENT);
@@ -908,6 +911,9 @@ dsl_deadlist_merge(dsl_deadlist_t *dl, uint64_t obj, dmu_tx_t *tx)
 	bzero(dlp, sizeof (*dlp));
 	dmu_buf_rele(bonus, FTAG);
 	mutex_exit(&dl->dl_lock);
+
+	kmem_free(za, sizeof (*za));
+	kmem_free(pza, sizeof (*pza));
 }
 
 /*
diff --git a/sys/contrib/openzfs/module/zfs/dsl_scan.c b/sys/contrib/openzfs/module/zfs/dsl_scan.c
index f3c639b0d04e..f0a851ff53a9 100644
--- a/sys/contrib/openzfs/module/zfs/dsl_scan.c
+++ b/sys/contrib/openzfs/module/zfs/dsl_scan.c
@@ -37,6 +37,7 @@
 #include <sys/dmu_tx.h>
 #include <sys/dmu_objset.h>
 #include <sys/arc.h>
+#include <sys/arc_impl.h>
 #include <sys/zap.h>
 #include <sys/zio.h>
 #include <sys/zfs_context.h>
@@ -126,12 +127,21 @@ static boolean_t scan_ds_queue_contains(dsl_scan_t *scn, uint64_t dsobj,
 static void scan_ds_queue_insert(dsl_scan_t *scn, uint64_t dsobj, uint64_t txg);
 static void scan_ds_queue_remove(dsl_scan_t *scn, uint64_t dsobj);
 static void scan_ds_queue_sync(dsl_scan_t *scn, dmu_tx_t *tx);
-static uint64_t dsl_scan_count_data_disks(vdev_t *vd);
+static uint64_t dsl_scan_count_data_disks(spa_t *spa);
 
 extern int zfs_vdev_async_write_active_min_dirty_percent;
 static int zfs_scan_blkstats = 0;
 
 /*
+ * 'zpool status' uses bytes processed per pass to report throughput and
+ * estimate time remaining.  We define a pass to start when the scanning
+ * phase completes for a sequential resilver.  Optionally, this value
+ * may be used to reset the pass statistics every N txgs to provide an
+ * estimated completion time based on currently observed performance.
+ */
+static uint_t zfs_scan_report_txgs = 0;
+
+/*
  * By default zfs will check to ensure it is not over the hard memory
  * limit before each txg. If finer-grained control of this is needed
  * this value can be set to 1 to enable checking before scanning each
@@ -147,7 +157,7 @@ int zfs_scan_strict_mem_lim = B_FALSE;
  * overload the drives with I/O, since that is protected by
  * zfs_vdev_scrub_max_active.
  */
-unsigned long zfs_scan_vdev_limit = 4 << 20;
+unsigned long zfs_scan_vdev_limit = 16 << 20;
 
 int zfs_scan_issue_strategy = 0;
 int zfs_scan_legacy = B_FALSE; /* don't queue & sort zios, go direct */
@@ -450,11 +460,12 @@ dsl_scan_init(dsl_pool_t *dp, uint64_t txg)
 
 	/*
 	 * Calculate the max number of in-flight bytes for pool-wide
-	 * scanning operations (minimum 1MB). Limits for the issuing
-	 * phase are done per top-level vdev and are handled separately.
+	 * scanning operations (minimum 1MB, maximum 1/4 of arc_c_max).
+	 * Limits for the issuing phase are done per top-level vdev and
+	 * are handled separately.
 	 */
-	scn->scn_maxinflight_bytes = MAX(zfs_scan_vdev_limit *
-	    dsl_scan_count_data_disks(spa->spa_root_vdev), 1ULL << 20);
+	scn->scn_maxinflight_bytes = MIN(arc_c_max / 4, MAX(1ULL << 20,
+	    zfs_scan_vdev_limit * dsl_scan_count_data_disks(spa)));
 
 	avl_create(&scn->scn_queue, scan_ds_queue_compare, sizeof (scan_ds_t),
 	    offsetof(scan_ds_t, sds_node));
@@ -584,6 +595,8 @@ dsl_scan_init(dsl_pool_t *dp, uint64_t txg)
 	}
 
 	spa_scan_stat_init(spa);
+	vdev_scan_stat_init(spa->spa_root_vdev);
+
 	return (0);
 }
 
@@ -742,6 +755,7 @@ dsl_scan_setup_sync(void *arg, dmu_tx_t *tx)
 	scn->scn_last_checkpoint = 0;
 	scn->scn_checkpointing = B_FALSE;
 	spa_scan_stat_init(spa);
+	vdev_scan_stat_init(spa->spa_root_vdev);
 
 	if (DSL_SCAN_IS_SCRUB_RESILVER(scn)) {
 		scn->scn_phys.scn_ddt_class_max = zfs_scrub_ddt_class_max;
@@ -2797,8 +2811,9 @@ dsl_scan_visit(dsl_scan_t *scn, dmu_tx_t *tx)
 }
 
 static uint64_t
-dsl_scan_count_data_disks(vdev_t *rvd)
+dsl_scan_count_data_disks(spa_t *spa)
 {
+	vdev_t *rvd = spa->spa_root_vdev;
 	uint64_t i, leaves = 0;
 
 	for (i = 0; i < rvd->vdev_children; i++) {
@@ -3638,6 +3653,16 @@ dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx)
 	}
 
 	/*
+	 * Disabled by default, set zfs_scan_report_txgs to report
+	 * average performance over the last zfs_scan_report_txgs TXGs.
+	 */
+	if (!dsl_scan_is_paused_scrub(scn) && zfs_scan_report_txgs != 0 &&
+	    tx->tx_txg % zfs_scan_report_txgs == 0) {
+		scn->scn_issued_before_pass += spa->spa_scan_pass_issued;
+		spa_scan_stat_init(spa);
+	}
+
+	/*
 	 * It is possible to switch from unsorted to sorted at any time,
 	 * but afterwards the scan will remain sorted unless reloaded from
 	 * a checkpoint after a reboot.
@@ -3693,12 +3718,13 @@ dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx)
 		taskqid_t prefetch_tqid;
 
 		/*
-		 * Recalculate the max number of in-flight bytes for pool-wide
-		 * scanning operations (minimum 1MB). Limits for the issuing
-		 * phase are done per top-level vdev and are handled separately.
+		 * Calculate the max number of in-flight bytes for pool-wide
+		 * scanning operations (minimum 1MB, maximum 1/4 of arc_c_max).
+		 * Limits for the issuing phase are done per top-level vdev and
+		 * are handled separately.
 		 */
-		scn->scn_maxinflight_bytes = MAX(zfs_scan_vdev_limit *
-		    dsl_scan_count_data_disks(spa->spa_root_vdev), 1ULL << 20);
+		scn->scn_maxinflight_bytes = MIN(arc_c_max / 4, MAX(1ULL << 20,
+		    zfs_scan_vdev_limit * dsl_scan_count_data_disks(spa)));
 
 		if (scnp->scn_ddt_bookmark.ddb_class <=
 		    scnp->scn_ddt_class_max) {
@@ -3759,6 +3785,9 @@ dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx)
 			if (scn->scn_is_sorted) {
 				scn->scn_checkpointing = B_TRUE;
 				scn->scn_clearing = B_TRUE;
+				scn->scn_issued_before_pass +=
+				    spa->spa_scan_pass_issued;
+				spa_scan_stat_init(spa);
 			}
 			zfs_dbgmsg("scan complete txg %llu",
 			    (longlong_t)tx->tx_txg);
@@ -4485,6 +4514,9 @@ ZFS_MODULE_PARAM(zfs, zfs_, scan_strict_mem_lim, INT, ZMOD_RW,
 ZFS_MODULE_PARAM(zfs, zfs_, scan_fill_weight, INT, ZMOD_RW,
 	"Tunable to adjust bias towards more filled segments during scans");
 
+ZFS_MODULE_PARAM(zfs, zfs_, scan_report_txgs, UINT, ZMOD_RW,
+	"Tunable to report resilver performance over the last N txgs");
+
 ZFS_MODULE_PARAM(zfs, zfs_, resilver_disable_defer, INT, ZMOD_RW,
 	"Process all resilvers immediately");
 /* END CSTYLED */
diff --git a/sys/contrib/openzfs/module/zfs/mmp.c b/sys/contrib/openzfs/module/zfs/mmp.c
index f67a4eb22a2d..139bb0acd277 100644
--- a/sys/contrib/openzfs/module/zfs/mmp.c
+++ b/sys/contrib/openzfs/module/zfs/mmp.c
@@ -444,7 +444,7 @@ mmp_write_uberblock(spa_t *spa)
 	uint64_t offset;
 
 	hrtime_t lock_acquire_time = gethrtime();
-	spa_config_enter(spa, SCL_STATE, mmp_tag, RW_READER);
+	spa_config_enter_mmp(spa, SCL_STATE, mmp_tag, RW_READER);
 	lock_acquire_time = gethrtime() - lock_acquire_time;
 	if (lock_acquire_time > (MSEC2NSEC(MMP_MIN_INTERVAL) / 10))
 		zfs_dbgmsg("MMP SCL_STATE acquisition pool '%s' took %llu ns "
diff --git a/sys/contrib/openzfs/module/zfs/spa.c b/sys/contrib/openzfs/module/zfs/spa.c
index 1ed79eed3e8b..5f238e6911f2 100644
--- a/sys/contrib/openzfs/module/zfs/spa.c
+++ b/sys/contrib/openzfs/module/zfs/spa.c
@@ -33,6 +33,7 @@
  * Copyright 2017 Joyent, Inc.
  * Copyright (c) 2017, Intel Corporation.
  * Copyright (c) 2021, Colm Buckley <colm@tuatha.org>
+ * Copyright (c) 2023 Hewlett Packard Enterprise Development LP.
  */
 
 /*
@@ -6261,6 +6262,16 @@ spa_tryimport(nvlist_t *tryconfig)
 		spa->spa_config_source = SPA_CONFIG_SRC_SCAN;
 	}
 
+	/*
+	 * spa_import() relies on a pool config fetched by spa_try_import()
+	 * for spare/cache devices. Import flags are not passed to
+	 * spa_tryimport(), which makes it return early due to a missing log
+	 * device and missing retrieving the cache device and spare eventually.
+	 * Passing ZFS_IMPORT_MISSING_LOG to spa_tryimport() makes it fetch
+	 * the correct configuration regardless of the missing log device.
+	 */
+	spa->spa_import_flags |= ZFS_IMPORT_MISSING_LOG;
+
 	error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING);
 
 	/*
@@ -6747,9 +6758,11 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing,
 		if (!spa_feature_is_enabled(spa, SPA_FEATURE_DEVICE_REBUILD))
 			return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
 
-		if (dsl_scan_resilvering(spa_get_dsl(spa)))
+		if (dsl_scan_resilvering(spa_get_dsl(spa)) ||
+		    dsl_scan_resilver_scheduled(spa_get_dsl(spa))) {
 			return (spa_vdev_exit(spa, NULL, txg,
 			    ZFS_ERR_RESILVER_IN_PROGRESS));
+		}
 	} else {
 		if (vdev_rebuild_active(rvd))
 			return (spa_vdev_exit(spa, NULL, txg,
@@ -6987,7 +7000,7 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing,
  * Detach a device from a mirror or replacing vdev.
  *
  * If 'replace_done' is specified, only detach if the parent
- * is a replacing vdev.
+ * is a replacing or a spare vdev.
  */
 int
 spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done)
@@ -7294,6 +7307,10 @@ spa_vdev_initialize_impl(spa_t *spa, uint64_t guid, uint64_t cmd_type,
 	    vd->vdev_initialize_state != VDEV_INITIALIZE_ACTIVE) {
 		mutex_exit(&vd->vdev_initialize_lock);
 		return (SET_ERROR(ESRCH));
+	} else if (cmd_type == POOL_INITIALIZE_UNINIT &&
+	    vd->vdev_initialize_thread != NULL) {
+		mutex_exit(&vd->vdev_initialize_lock);
+		return (SET_ERROR(EBUSY));
 	}
 
 	switch (cmd_type) {
@@ -7306,6 +7323,9 @@ spa_vdev_initialize_impl(spa_t *spa, uint64_t guid, uint64_t cmd_type,
 	case POOL_INITIALIZE_SUSPEND:
 		vdev_initialize_stop(vd, VDEV_INITIALIZE_SUSPENDED, vd_list);
 		break;
+	case POOL_INITIALIZE_UNINIT:
+		vdev_uninitialize(vd);
+		break;
 	default:
 		panic("invalid cmd_type %llu", (unsigned long long)cmd_type);
 	}
@@ -8210,7 +8230,8 @@ spa_async_thread(void *arg)
 	 * If any devices are done replacing, detach them.
 	 */
 	if (tasks & SPA_ASYNC_RESILVER_DONE ||
-	    tasks & SPA_ASYNC_REBUILD_DONE) {
+	    tasks & SPA_ASYNC_REBUILD_DONE ||
+	    tasks & SPA_ASYNC_DETACH_SPARE) {
 		spa_vdev_resilver_done(spa);
 	}
 
diff --git a/sys/contrib/openzfs/module/zfs/spa_misc.c b/sys/contrib/openzfs/module/zfs/spa_misc.c
index a57f0727db31..113943026d59 100644
--- a/sys/contrib/openzfs/module/zfs/spa_misc.c
+++ b/sys/contrib/openzfs/module/zfs/spa_misc.c
@@ -494,8 +494,9 @@ spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw)
 	return (1);
 }
 
-void
-spa_config_enter(spa_t *spa, int locks, const void *tag, krw_t rw)
+static void
+spa_config_enter_impl(spa_t *spa, int locks, const void *tag, krw_t rw,
+    int mmp_flag)
 {
 	(void) tag;
 	int wlocks_held = 0;
@@ -510,7 +511,8 @@ spa_config_enter(spa_t *spa, int locks, const void *tag, krw_t rw)
 			continue;
 		mutex_enter(&scl->scl_lock);
 		if (rw == RW_READER) {
-			while (scl->scl_writer || scl->scl_write_wanted) {
+			while (scl->scl_writer ||
+			    (!mmp_flag && scl->scl_write_wanted)) {
 				cv_wait(&scl->scl_cv, &scl->scl_lock);
 			}
 		} else {
@@ -529,6 +531,27 @@ spa_config_enter(spa_t *spa, int locks, const void *tag, krw_t rw)
 }
 
 void
+spa_config_enter(spa_t *spa, int locks, const void *tag, krw_t rw)
+{
+	spa_config_enter_impl(spa, locks, tag, rw, 0);
+}
+
+/*
+ * The spa_config_enter_mmp() allows the mmp thread to cut in front of
+ * outstanding write lock requests. This is needed since the mmp updates are
+ * time sensitive and failure to service them promptly will result in a
+ * suspended pool. This pool suspension has been seen in practice when there is
+ * a single disk in a pool that is responding slowly and presumably about to
+ * fail.
+ */
+
+void
+spa_config_enter_mmp(spa_t *spa, int locks, const void *tag, krw_t rw)
+{
+	spa_config_enter_impl(spa, locks, tag, rw, 1);
+}
+
+void
 spa_config_exit(spa_t *spa, int locks, const void *tag)
 {
 	(void) tag;
@@ -2564,7 +2587,6 @@ spa_scan_stat_init(spa_t *spa)
 	spa->spa_scan_pass_scrub_spent_paused = 0;
 	spa->spa_scan_pass_exam = 0;
 	spa->spa_scan_pass_issued = 0;
-	vdev_scan_stat_init(spa->spa_root_vdev);
 }
 
 /*
diff --git a/sys/contrib/openzfs/module/zfs/vdev.c b/sys/contrib/openzfs/module/zfs/vdev.c
index 4b9d7e7c0506..57259b8ce88e 100644
--- a/sys/contrib/openzfs/module/zfs/vdev.c
+++ b/sys/contrib/openzfs/module/zfs/vdev.c
@@ -28,7 +28,7 @@
  * Copyright 2017 Joyent, Inc.
  * Copyright (c) 2017, Intel Corporation.
  * Copyright (c) 2019, Datto Inc. All rights reserved.
- * Copyright [2021] Hewlett Packard Enterprise Development LP
+ * Copyright (c) 2021, 2023 Hewlett Packard Enterprise Development LP.
  */
 
 #include <sys/zfs_context.h>
@@ -2646,6 +2646,17 @@ vdev_reopen(vdev_t *vd)
 	}
 
 	/*
+	 * Recheck if resilver is still needed and cancel any
+	 * scheduled resilver if resilver is unneeded.
+	 */
+	if (!vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL) &&
+	    spa->spa_async_tasks & SPA_ASYNC_RESILVER) {
+		mutex_enter(&spa->spa_async_lock);
+		spa->spa_async_tasks &= ~SPA_ASYNC_RESILVER;
+		mutex_exit(&spa->spa_async_lock);
+	}
+
+	/*
 	 * Reassess parent vdev's health.
 	 */
 	vdev_propagate_state(vd);
@@ -3983,11 +3994,18 @@ vdev_remove_wanted(spa_t *spa, uint64_t guid)
 		return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENODEV)));
 
 	/*
-	 * If the vdev is already removed, then don't do anything.
+	 * If the vdev is already removed, or expanding which can trigger
+	 * repartition add/remove events, then don't do anything.
 	 */
-	if (vd->vdev_removed)
+	if (vd->vdev_removed || vd->vdev_expanding)
 		return (spa_vdev_state_exit(spa, NULL, 0));
 
+	/*
+	 * Confirm the vdev has been removed, otherwise don't do anything.
+	 */
+	if (vd->vdev_ops->vdev_op_leaf && !zio_wait(vdev_probe(vd, NULL)))
+		return (spa_vdev_state_exit(spa, NULL, SET_ERROR(EEXIST)));
+
 	vd->vdev_remove_wanted = B_TRUE;
 	spa_async_request(spa, SPA_ASYNC_REMOVE);
 
@@ -4085,9 +4103,19 @@ vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate)
 
 	if (wasoffline ||
 	    (oldstate < VDEV_STATE_DEGRADED &&
-	    vd->vdev_state >= VDEV_STATE_DEGRADED))
+	    vd->vdev_state >= VDEV_STATE_DEGRADED)) {
 		spa_event_notify(spa, vd, NULL, ESC_ZFS_VDEV_ONLINE);
 
+		/*
+		 * Asynchronously detach spare vdev if resilver or
+		 * rebuild is not required
+		 */
+		if (vd->vdev_unspare &&
+		    !dsl_scan_resilvering(spa->spa_dsl_pool) &&
+		    !dsl_scan_resilver_scheduled(spa->spa_dsl_pool) &&
+		    !vdev_rebuild_active(tvd))
+			spa_async_request(spa, SPA_ASYNC_DETACH_SPARE);
+	}
 	return (spa_vdev_state_exit(spa, vd, 0));
 }
 
diff --git a/sys/contrib/openzfs/module/zfs/vdev_initialize.c b/sys/contrib/openzfs/module/zfs/vdev_initialize.c
index 6ffd0d618fdd..5d90fd67cc2f 100644
--- a/sys/contrib/openzfs/module/zfs/vdev_initialize.c
+++ b/sys/contrib/openzfs/module/zfs/vdev_initialize.c
@@ -101,6 +101,39 @@ vdev_initialize_zap_update_sync(void *arg, dmu_tx_t *tx)
 }
 
 static void
+vdev_initialize_zap_remove_sync(void *arg, dmu_tx_t *tx)
+{
+	uint64_t guid = *(uint64_t *)arg;
+
+	kmem_free(arg, sizeof (uint64_t));
+
+	vdev_t *vd = spa_lookup_by_guid(tx->tx_pool->dp_spa, guid, B_FALSE);
+	if (vd == NULL || vd->vdev_top->vdev_removing || !vdev_is_concrete(vd))
+		return;
+
+	ASSERT3S(vd->vdev_initialize_state, ==, VDEV_INITIALIZE_NONE);
+	ASSERT3U(vd->vdev_leaf_zap, !=, 0);
+
+	vd->vdev_initialize_last_offset = 0;
+	vd->vdev_initialize_action_time = 0;
+
+	objset_t *mos = vd->vdev_spa->spa_meta_objset;
+	int error;
+
+	error = zap_remove(mos, vd->vdev_leaf_zap,
+	    VDEV_LEAF_ZAP_INITIALIZE_LAST_OFFSET, tx);
+	VERIFY(error == 0 || error == ENOENT);
+
+	error = zap_remove(mos, vd->vdev_leaf_zap,
+	    VDEV_LEAF_ZAP_INITIALIZE_STATE, tx);
+	VERIFY(error == 0 || error == ENOENT);
+
+	error = zap_remove(mos, vd->vdev_leaf_zap,
+	    VDEV_LEAF_ZAP_INITIALIZE_ACTION_TIME, tx);
+	VERIFY(error == 0 || error == ENOENT);
+}
+
+static void
 vdev_initialize_change_state(vdev_t *vd, vdev_initializing_state_t new_state)
 {
 	ASSERT(MUTEX_HELD(&vd->vdev_initialize_lock));
@@ -127,8 +160,14 @@ vdev_initialize_change_state(vdev_t *vd, vdev_initializing_state_t new_state)
 
 	dmu_tx_t *tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
 	VERIFY0(dmu_tx_assign(tx, TXG_WAIT));
-	dsl_sync_task_nowait(spa_get_dsl(spa), vdev_initialize_zap_update_sync,
-	    guid, tx);
+
+	if (new_state != VDEV_INITIALIZE_NONE) {
+		dsl_sync_task_nowait(spa_get_dsl(spa),
+		    vdev_initialize_zap_update_sync, guid, tx);
+	} else {
+		dsl_sync_task_nowait(spa_get_dsl(spa),
+		    vdev_initialize_zap_remove_sync, guid, tx);
+	}
 
 	switch (new_state) {
 	case VDEV_INITIALIZE_ACTIVE:
@@ -149,6 +188,10 @@ vdev_initialize_change_state(vdev_t *vd, vdev_initializing_state_t new_state)
 		spa_history_log_internal(spa, "initialize", tx,
 		    "vdev=%s complete", vd->vdev_path);
 		break;
+	case VDEV_INITIALIZE_NONE:
+		spa_history_log_internal(spa, "uninitialize", tx,
+		    "vdev=%s", vd->vdev_path);
+		break;
 	default:
 		panic("invalid state %llu", (unsigned long long)new_state);
 	}
@@ -605,6 +648,24 @@ vdev_initialize(vdev_t *vd)
 }
 
 /*
+ * Uninitializes a device. Caller must hold vdev_initialize_lock.
+ * Device must be a leaf and not already be initializing.
+ */
+void
+vdev_uninitialize(vdev_t *vd)
+{
+	ASSERT(MUTEX_HELD(&vd->vdev_initialize_lock));
+	ASSERT(vd->vdev_ops->vdev_op_leaf);
+	ASSERT(vdev_is_concrete(vd));
+	ASSERT3P(vd->vdev_initialize_thread, ==, NULL);
+	ASSERT(!vd->vdev_detached);
+	ASSERT(!vd->vdev_initialize_exit_wanted);
+	ASSERT(!vd->vdev_top->vdev_removing);
+
+	vdev_initialize_change_state(vd, VDEV_INITIALIZE_NONE);
+}
+
+/*
  * Wait for the initialize thread to be terminated (cancelled or stopped).
  */
 static void
@@ -760,6 +821,7 @@ vdev_initialize_restart(vdev_t *vd)
 }
 
 EXPORT_SYMBOL(vdev_initialize);
+EXPORT_SYMBOL(vdev_uninitialize);
 EXPORT_SYMBOL(vdev_initialize_stop);
 EXPORT_SYMBOL(vdev_initialize_stop_all);
 EXPORT_SYMBOL(vdev_initialize_stop_wait);
diff --git a/sys/contrib/openzfs/module/zfs/vdev_rebuild.c b/sys/contrib/openzfs/module/zfs/vdev_rebuild.c
index 9dfbe0cf6f30..b180fa14682e 100644
--- a/sys/contrib/openzfs/module/zfs/vdev_rebuild.c
+++ b/sys/contrib/openzfs/module/zfs/vdev_rebuild.c
@@ -34,6 +34,7 @@
 #include <sys/zio.h>
 #include <sys/dmu_tx.h>
 #include <sys/arc.h>
+#include <sys/arc_impl.h>
 #include <sys/zap.h>
 
 /*
@@ -116,13 +117,12 @@ unsigned long zfs_rebuild_max_segment = 1024 * 1024;
  * segment size is also large (zfs_rebuild_max_segment=1M).  This helps keep
  * the queue depth short.
  *
- * 32MB was selected as the default value to achieve good performance with
- * a large 90-drive dRAID HDD configuration (draid2:8d:90c:2s). A sequential
- * rebuild was unable to saturate all of the drives using smaller values.
- * With a value of 32MB the sequential resilver write rate was measured at
- * 800MB/s sustained while rebuilding to a distributed spare.
+ * 64MB was observed to deliver the best performance and set as the default.
+ * Testing was performed with a 106-drive dRAID HDD pool (draid2:11d:106c)
+ * and a rebuild rate of 1.2GB/s was measured to the distribute spare.
+ * Smaller values were unable to fully saturate the available pool I/O.
  */
-unsigned long zfs_rebuild_vdev_limit = 32 << 20;
+unsigned long zfs_rebuild_vdev_limit = 64 << 20;
 
 /*
  * Automatically start a pool scrub when the last active sequential resilver
@@ -754,6 +754,7 @@ vdev_rebuild_thread(void *arg)
 {
 	vdev_t *vd = arg;
 	spa_t *spa = vd->vdev_spa;
+	vdev_t *rvd = spa->spa_root_vdev;
 	int error = 0;
 
 	/*
@@ -786,9 +787,6 @@ vdev_rebuild_thread(void *arg)
 	vr->vr_pass_bytes_scanned = 0;
 	vr->vr_pass_bytes_issued = 0;
 
-	vr->vr_bytes_inflight_max = MAX(1ULL << 20,
-	    zfs_rebuild_vdev_limit * vd->vdev_children);
-
 	uint64_t update_est_time = gethrtime();
 	vdev_rebuild_update_bytes_est(vd, 0);
 
@@ -805,6 +803,17 @@ vdev_rebuild_thread(void *arg)
 		vr->vr_scan_msp = msp;
 
 		/*
+		 * Calculate the max number of in-flight bytes for top-level
+		 * vdev scanning operations (minimum 1MB, maximum 1/4 of
+		 * arc_c_max shared by all top-level vdevs).  Limits for the
+		 * issuing phase are done per top-level vdev and are handled
+		 * separately.
+		 */
+		uint64_t limit = (arc_c_max / 4) / MAX(rvd->vdev_children, 1);
+		vr->vr_bytes_inflight_max = MIN(limit, MAX(1ULL << 20,
+		    zfs_rebuild_vdev_limit * vd->vdev_children));
+
+		/*
 		 * Removal of vdevs from the vdev tree may eliminate the need
 		 * for the rebuild, in which case it should be canceled.  The
 		 * vdev_rebuild_cancel_wanted flag is set until the sync task
diff --git a/sys/contrib/openzfs/module/zfs/zfs_ioctl.c b/sys/contrib/openzfs/module/zfs/zfs_ioctl.c
index a4b391cbea12..f441328f3018 100644
--- a/sys/contrib/openzfs/module/zfs/zfs_ioctl.c
+++ b/sys/contrib/openzfs/module/zfs/zfs_ioctl.c
@@ -3985,7 +3985,8 @@ zfs_ioc_pool_initialize(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
 
 	if (!(cmd_type == POOL_INITIALIZE_CANCEL ||
 	    cmd_type == POOL_INITIALIZE_START ||
-	    cmd_type == POOL_INITIALIZE_SUSPEND)) {
+	    cmd_type == POOL_INITIALIZE_SUSPEND ||
+	    cmd_type == POOL_INITIALIZE_UNINIT)) {
 		return (SET_ERROR(EINVAL));
 	}
 
diff --git a/sys/contrib/openzfs/module/zfs/zfs_vnops.c b/sys/contrib/openzfs/module/zfs/zfs_vnops.c
index b9498d17ee2f..0987fd0f7bb7 100644
--- a/sys/contrib/openzfs/module/zfs/zfs_vnops.c
+++ b/sys/contrib/openzfs/module/zfs/zfs_vnops.c
@@ -68,7 +68,9 @@ zfs_fsync(znode_t *zp, int syncflag, cred_t *cr)
 	if (zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED) {
 		ZFS_ENTER(zfsvfs);
 		ZFS_VERIFY_ZP(zp);
+		atomic_inc_32(&zp->z_sync_writes_cnt);
 		zil_commit(zfsvfs->z_log, zp->z_id);
+		atomic_dec_32(&zp->z_sync_writes_cnt);
 		ZFS_EXIT(zfsvfs);
 	}
 	tsd_set(zfs_fsyncer_key, NULL);
@@ -102,7 +104,7 @@ zfs_holey_common(znode_t *zp, ulong_t cmd, loff_t *off)
 		hole = B_FALSE;
 
 	/* Flush any mmap()'d data to disk */
-	if (zn_has_cached_data(zp))
+	if (zn_has_cached_data(zp, 0, file_sz - 1))
 		zn_flush_cached_data(zp, B_FALSE);
 
 	lr = zfs_rangelock_enter(&zp->z_rangelock, 0, UINT64_MAX, RL_READER);
@@ -275,7 +277,8 @@ zfs_read(struct znode *zp, zfs_uio_t *uio, int ioflag, cred_t *cr)
 			error = mappedread_sf(zp, nbytes, uio);
 		else
 #endif
-		if (zn_has_cached_data(zp) && !(ioflag & O_DIRECT)) {
+		if (zn_has_cached_data(zp, zfs_uio_offset(uio),
+		    zfs_uio_offset(uio) + nbytes - 1) && !(ioflag & O_DIRECT)) {
 			error = mappedread(zp, nbytes, uio);
 		} else {
 			error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
@@ -686,7 +689,8 @@ zfs_write(znode_t *zp, zfs_uio_t *uio, int ioflag, cred_t *cr)
 			zfs_uioskip(uio, nbytes);
 			tx_bytes = nbytes;
 		}
-		if (tx_bytes && zn_has_cached_data(zp) &&
+		if (tx_bytes &&
+		    zn_has_cached_data(zp, woff, woff + tx_bytes - 1) &&
 		    !(ioflag & O_DIRECT)) {
 			update_pages(zp, woff, tx_bytes, zfsvfs->z_os);
 		}
diff --git a/sys/contrib/openzfs/module/zfs/zil.c b/sys/contrib/openzfs/module/zfs/zil.c
index aaf509a2fc73..f2aaeb550fb7 100644
--- a/sys/contrib/openzfs/module/zfs/zil.c
+++ b/sys/contrib/openzfs/module/zfs/zil.c
@@ -226,11 +226,10 @@ zil_init_log_chain(zilog_t *zilog, blkptr_t *bp)
  */
 static int
 zil_read_log_block(zilog_t *zilog, boolean_t decrypt, const blkptr_t *bp,
-    blkptr_t *nbp, void *dst, char **end)
+    blkptr_t *nbp, char **begin, char **end, arc_buf_t **abuf)
 {
 	enum zio_flag zio_flags = ZIO_FLAG_CANFAIL;
 	arc_flags_t aflags = ARC_FLAG_WAIT;
-	arc_buf_t *abuf = NULL;
 	zbookmark_phys_t zb;
 	int error;
 
@@ -247,7 +246,7 @@ zil_read_log_block(zilog_t *zilog, boolean_t decrypt, const blkptr_t *bp,
 	    ZB_ZIL_OBJECT, ZB_ZIL_LEVEL, bp->blk_cksum.zc_word[ZIL_ZC_SEQ]);
 
 	error = arc_read(NULL, zilog->zl_spa, bp, arc_getbuf_func,
-	    &abuf, ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb);
+	    abuf, ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb);
 
 	if (error == 0) {
 		zio_cksum_t cksum = bp->blk_cksum;
@@ -262,23 +261,23 @@ zil_read_log_block(zilog_t *zilog, boolean_t decrypt, const blkptr_t *bp,
 		 */
 		cksum.zc_word[ZIL_ZC_SEQ]++;
 
+		uint64_t size = BP_GET_LSIZE(bp);
 		if (BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_ZILOG2) {
-			zil_chain_t *zilc = abuf->b_data;
+			zil_chain_t *zilc = (*abuf)->b_data;
 			char *lr = (char *)(zilc + 1);
-			uint64_t len = zilc->zc_nused - sizeof (zil_chain_t);
 
 			if (bcmp(&cksum, &zilc->zc_next_blk.blk_cksum,
-			    sizeof (cksum)) || BP_IS_HOLE(&zilc->zc_next_blk)) {
+			    sizeof (cksum)) || BP_IS_HOLE(&zilc->zc_next_blk) ||
+			    zilc->zc_nused < sizeof (*zilc) ||
+			    zilc->zc_nused > size) {
 				error = SET_ERROR(ECKSUM);
 			} else {
-				ASSERT3U(len, <=, SPA_OLD_MAXBLOCKSIZE);
-				bcopy(lr, dst, len);
-				*end = (char *)dst + len;
+				*begin = lr;
+				*end = lr + zilc->zc_nused - sizeof (*zilc);
 				*nbp = zilc->zc_next_blk;
 			}
 		} else {
-			char *lr = abuf->b_data;
-			uint64_t size = BP_GET_LSIZE(bp);
+			char *lr = (*abuf)->b_data;
 			zil_chain_t *zilc = (zil_chain_t *)(lr + size) - 1;
 
 			if (bcmp(&cksum, &zilc->zc_next_blk.blk_cksum,
@@ -286,15 +285,11 @@ zil_read_log_block(zilog_t *zilog, boolean_t decrypt, const blkptr_t *bp,
 			    (zilc->zc_nused > (size - sizeof (*zilc)))) {
 				error = SET_ERROR(ECKSUM);
 			} else {
-				ASSERT3U(zilc->zc_nused, <=,
-				    SPA_OLD_MAXBLOCKSIZE);
-				bcopy(lr, dst, zilc->zc_nused);
-				*end = (char *)dst + zilc->zc_nused;
+				*begin = lr;
+				*end = lr + zilc->zc_nused;
 				*nbp = zilc->zc_next_blk;
 			}
 		}
-
-		arc_buf_destroy(abuf, &abuf);
 	}
 
 	return (error);
@@ -362,7 +357,6 @@ zil_parse(zilog_t *zilog, zil_parse_blk_func_t *parse_blk_func,
 	uint64_t blk_count = 0;
 	uint64_t lr_count = 0;
 	blkptr_t blk, next_blk;
-	char *lrbuf, *lrp;
 	int error = 0;
 
 	bzero(&next_blk, sizeof (blkptr_t));
@@ -382,13 +376,13 @@ zil_parse(zilog_t *zilog, zil_parse_blk_func_t *parse_blk_func,
 	 * If the log has been claimed, stop if we encounter a sequence
 	 * number greater than the highest claimed sequence number.
 	 */
-	lrbuf = zio_buf_alloc(SPA_OLD_MAXBLOCKSIZE);
 	zil_bp_tree_init(zilog);
 
 	for (blk = zh->zh_log; !BP_IS_HOLE(&blk); blk = next_blk) {
 		uint64_t blk_seq = blk.blk_cksum.zc_word[ZIL_ZC_SEQ];
 		int reclen;
-		char *end = NULL;
+		char *lrp, *end;
+		arc_buf_t *abuf = NULL;
 
 		if (blk_seq > claim_blk_seq)
 			break;
@@ -404,8 +398,10 @@ zil_parse(zilog_t *zilog, zil_parse_blk_func_t *parse_blk_func,
 			break;
 
 		error = zil_read_log_block(zilog, decrypt, &blk, &next_blk,
-		    lrbuf, &end);
+		    &lrp, &end, &abuf);
 		if (error != 0) {
+			if (abuf)
+				arc_buf_destroy(abuf, &abuf);
 			if (claimed) {
 				char name[ZFS_MAX_DATASET_NAME_LEN];
 
@@ -418,7 +414,7 @@ zil_parse(zilog_t *zilog, zil_parse_blk_func_t *parse_blk_func,
 			break;
 		}
 
-		for (lrp = lrbuf; lrp < end; lrp += reclen) {
+		for (; lrp < end; lrp += reclen) {
 			lr_t *lr = (lr_t *)lrp;
 			reclen = lr->lrc_reclen;
 			ASSERT3U(reclen, >=, sizeof (lr_t));
@@ -432,6 +428,7 @@ zil_parse(zilog_t *zilog, zil_parse_blk_func_t *parse_blk_func,
 			max_lr_seq = lr->lrc_seq;
 			lr_count++;
 		}
+		arc_buf_destroy(abuf, &abuf);
 	}
 done:
 	zilog->zl_parse_error = error;
@@ -441,7 +438,6 @@ done:
 	zilog->zl_parse_lr_count = lr_count;
 
 	zil_bp_tree_fini(zilog);
-	zio_buf_free(lrbuf, SPA_OLD_MAXBLOCKSIZE);
 
 	return (error);
 }
@@ -1593,6 +1589,7 @@ zil_lwb_write_issue(zilog_t *zilog, lwb_t *lwb)
 		wsz = P2ROUNDUP_TYPED(lwb->lwb_nused, ZIL_MIN_BLKSZ, uint64_t);
 		ASSERT3U(wsz, <=, lwb->lwb_sz);
 		zio_shrink(lwb->lwb_write_zio, wsz);
+		wsz = lwb->lwb_write_zio->io_size;
 
 	} else {
 		wsz = lwb->lwb_sz;
@@ -2848,7 +2845,14 @@ static void
 zil_commit_itx_assign(zilog_t *zilog, zil_commit_waiter_t *zcw)
 {
 	dmu_tx_t *tx = dmu_tx_create(zilog->zl_os);
-	VERIFY0(dmu_tx_assign(tx, TXG_WAIT));
+
+	/*
+	 * Since we are not going to create any new dirty data, and we
+	 * can even help with clearing the existing dirty data, we
+	 * should not be subject to the dirty data based delays. We
+	 * use TXG_NOTHROTTLE to bypass the delay mechanism.
+	 */
+	VERIFY0(dmu_tx_assign(tx, TXG_WAIT | TXG_NOTHROTTLE));
 
 	itx_t *itx = zil_itx_create(TX_COMMIT, sizeof (lr_t));
 	itx->itx_sync = B_TRUE;
diff --git a/sys/contrib/openzfs/module/zfs/zio.c b/sys/contrib/openzfs/module/zfs/zio.c
index 700f8791045f..c367ef7211aa 100644
--- a/sys/contrib/openzfs/module/zfs/zio.c
+++ b/sys/contrib/openzfs/module/zfs/zio.c
@@ -2287,7 +2287,7 @@ zio_nowait(zio_t *zio)
 	ASSERT3P(zio->io_executor, ==, NULL);
 
 	if (zio->io_child_type == ZIO_CHILD_LOGICAL &&
-	    zio_unique_parent(zio) == NULL) {
+	    list_is_empty(&zio->io_parent_list)) {
 		zio_t *pio;
 
 		/*
diff --git a/sys/contrib/openzfs/tests/runfiles/common.run b/sys/contrib/openzfs/tests/runfiles/common.run
index 554cf96f883a..6c2296d4c269 100644
--- a/sys/contrib/openzfs/tests/runfiles/common.run
+++ b/sys/contrib/openzfs/tests/runfiles/common.run
@@ -37,7 +37,7 @@ tests = ['alloc_class_001_pos', 'alloc_class_002_neg', 'alloc_class_003_pos',
     'alloc_class_004_pos', 'alloc_class_005_pos', 'alloc_class_006_pos',
     'alloc_class_007_pos', 'alloc_class_008_pos', 'alloc_class_009_pos',
     'alloc_class_010_pos', 'alloc_class_011_neg', 'alloc_class_012_pos',
-    'alloc_class_013_pos']
+    'alloc_class_013_pos', 'alloc_class_014_neg', 'alloc_class_015_pos']
 tags = ['functional', 'alloc_class']
 
 [tests/functional/arc]
@@ -407,7 +407,7 @@ tests = ['zpool_import_001_pos', 'zpool_import_002_pos',
     'import_cachefile_mirror_detached',
     'import_cachefile_paths_changed',
     'import_cachefile_shared_device',
-    'import_devices_missing',
+    'import_devices_missing', 'import_log_missing',
     'import_paths_changed',
     'import_rewind_config_changed',
     'import_rewind_device_replaced']
@@ -431,6 +431,7 @@ tests = ['zpool_initialize_attach_detach_add_remove',
     'zpool_initialize_start_and_cancel_neg',
     'zpool_initialize_start_and_cancel_pos',
     'zpool_initialize_suspend_resume',
+    'zpool_initialize_uninit',
     'zpool_initialize_unsupported_vdevs',
     'zpool_initialize_verify_checksums',
     'zpool_initialize_verify_initialized']
@@ -456,7 +457,8 @@ tests = ['zpool_replace_001_neg', 'replace-o_ashift', 'replace_prop_ashift']
 tags = ['functional', 'cli_root', 'zpool_replace']
 
 [tests/functional/cli_root/zpool_resilver]
-tests = ['zpool_resilver_bad_args', 'zpool_resilver_restart']
+tests = ['zpool_resilver_bad_args', 'zpool_resilver_restart',
+    'zpool_resilver_concurrent']
 tags = ['functional', 'cli_root', 'zpool_resilver']
 
 [tests/functional/cli_root/zpool_scrub]
@@ -669,7 +671,8 @@ tests = ['migration_001_pos', 'migration_002_pos', 'migration_003_pos',
 tags = ['functional', 'migration']
 
 [tests/functional/mmap]
-tests = ['mmap_write_001_pos', 'mmap_read_001_pos', 'mmap_seek_001_pos']
+tests = ['mmap_mixed', 'mmap_read_001_pos', 'mmap_seek_001_pos',
+    'mmap_write_001_pos', 'mmap_sync_001_pos']
 tags = ['functional', 'mmap']
 
 [tests/functional/mount]
@@ -823,9 +826,9 @@ tests = ['recv_dedup', 'recv_dedup_encrypted_zvol', 'rsend_001_pos',
     'send-c_mixed_compression', 'send-c_stream_size_estimate',
     'send-c_embedded_blocks', 'send-c_resume', 'send-cpL_varied_recsize',
     'send-c_recv_dedup', 'send-L_toggle',
-    'send_encrypted_incremental.ksh', 'send_encrypted_hierarchy',
-    'send_encrypted_props', 'send_encrypted_truncated_files',
-    'send_freeobjects', 'send_realloc_files',
+    'send_encrypted_incremental.ksh', 'send_encrypted_freeobjects',
+    'send_encrypted_hierarchy', 'send_encrypted_props',
+    'send_encrypted_truncated_files', 'send_freeobjects', 'send_realloc_files',
     'send_realloc_encrypted_files', 'send_spill_block', 'send_holds',
     'send_hole_birth', 'send_mixed_raw', 'send-wR_encrypted_zvol',
     'send_partial_dataset', 'send_invalid', 'send_doall',
diff --git a/sys/contrib/openzfs/tests/runfiles/sanity.run b/sys/contrib/openzfs/tests/runfiles/sanity.run
index fb39fa54b9d5..0a3d42cb269d 100644
--- a/sys/contrib/openzfs/tests/runfiles/sanity.run
+++ b/sys/contrib/openzfs/tests/runfiles/sanity.run
@@ -547,6 +547,7 @@ tests = ['recv_dedup', 'recv_dedup_encrypted_zvol', 'rsend_001_pos',
     'rsend_014_pos', 'rsend_016_neg', 'send-c_verify_contents',
     'send-c_volume', 'send-c_zstreamdump', 'send-c_recv_dedup',
     'send-L_toggle', 'send_encrypted_hierarchy', 'send_encrypted_props',
+    'send_encrypted_freeobjects',
     'send_encrypted_truncated_files', 'send_freeobjects', 'send_holds',
     'send_mixed_raw', 'send-wR_encrypted_zvol', 'send_partial_dataset',
     'send_invalid']
diff --git a/sys/contrib/openzfs/tests/test-runner/bin/test-runner.py.in b/sys/contrib/openzfs/tests/test-runner/bin/test-runner.py.in
index a652d3d4a0ff..5c868d945a8c 100755
--- a/sys/contrib/openzfs/tests/test-runner/bin/test-runner.py.in
+++ b/sys/contrib/openzfs/tests/test-runner/bin/test-runner.py.in
@@ -33,7 +33,7 @@ from subprocess import PIPE
 from subprocess import Popen
 from subprocess import check_output
 from threading import Timer
-from time import time, CLOCK_MONOTONIC_RAW
+from time import time, CLOCK_MONOTONIC
 from os.path import exists
 
 BASEDIR = '/var/tmp/test_results'
@@ -62,7 +62,7 @@ clock_gettime.argtypes = [ctypes.c_int, ctypes.POINTER(timespec)]
 
 def monotonic_time():
     t = timespec()
-    if clock_gettime(CLOCK_MONOTONIC_RAW, ctypes.pointer(t)) != 0:
+    if clock_gettime(CLOCK_MONOTONIC, ctypes.pointer(t)) != 0:
         errno_ = ctypes.get_errno()
         raise OSError(errno_, os.strerror(errno_))
     return t.tv_sec + t.tv_nsec * 1e-9
diff --git a/sys/contrib/openzfs/tests/test-runner/bin/zts-report.py.in b/sys/contrib/openzfs/tests/test-runner/bin/zts-report.py.in
index 432899c21f4d..878b30025d16 100755
--- a/sys/contrib/openzfs/tests/test-runner/bin/zts-report.py.in
+++ b/sys/contrib/openzfs/tests/test-runner/bin/zts-report.py.in
@@ -183,10 +183,13 @@ if sys.platform.startswith('freebsd'):
     known.update({
         'cli_root/zfs_receive/receive-o-x_props_override':
             ['FAIL', known_reason],
+        'cli_root/zpool_resilver/zpool_resilver_concurrent':
+            ['SKIP', na_reason],
         'cli_root/zpool_wait/zpool_wait_trim_basic': ['SKIP', trim_reason],
         'cli_root/zpool_wait/zpool_wait_trim_cancel': ['SKIP', trim_reason],
         'cli_root/zpool_wait/zpool_wait_trim_flag': ['SKIP', trim_reason],
         'link_count/link_count_001': ['SKIP', na_reason],
+        'mmap/mmap_sync_001_pos': ['SKIP', na_reason],
     })
 elif sys.platform.startswith('linux'):
     known.update({
@@ -210,6 +213,7 @@ elif sys.platform.startswith('linux'):
 # reasons listed above can be used.
 #
 maybe = {
+    'threadsappend/threadsappend_001_pos': ['FAIL', 6136],
     'chattr/setup': ['SKIP', exec_reason],
     'crtime/crtime_001_pos': ['SKIP', statx_reason],
     'cli_root/zdb/zdb_006_pos': ['FAIL', known_reason],
@@ -243,6 +247,7 @@ maybe = {
     'mmp/mmp_on_uberblocks': ['FAIL', known_reason],
     'pyzfs/pyzfs_unittest': ['SKIP', python_deps_reason],
     'pool_checkpoint/checkpoint_discard_busy': ['FAIL', '11946'],
+    'pam/setup': ['SKIP', "pamtester might be not available"],
     'projectquota/setup': ['SKIP', exec_reason],
     'removal/removal_condense_export': ['FAIL', known_reason],
     'reservation/reservation_008_pos': ['FAIL', '7741'],
@@ -252,14 +257,12 @@ maybe = {
     'snapshot/snapshot_010_pos': ['FAIL', '7961'],
     'snapused/snapused_004_pos': ['FAIL', '5513'],
     'tmpfile/setup': ['SKIP', tmpfile_reason],
-    'threadsappend/threadsappend_001_pos': ['FAIL', '6136'],
     'trim/setup': ['SKIP', trim_reason],
     'upgrade/upgrade_projectquota_001_pos': ['SKIP', project_id_reason],
     'user_namespace/setup': ['SKIP', user_ns_reason],
     'userquota/setup': ['SKIP', exec_reason],
-    'vdev_zaps/vdev_zaps_004_pos': ['FAIL', '6935'],
+    'vdev_zaps/vdev_zaps_004_pos': ['FAIL', known_reason],
     'zvol/zvol_ENOSPC/zvol_ENOSPC_001_pos': ['FAIL', '5848'],
-    'pam/setup': ['SKIP', "pamtester might be not available"],
 }
 
 if sys.platform.startswith('freebsd'):
@@ -275,12 +278,18 @@ if sys.platform.startswith('freebsd'):
         'resilver/resilver_restart_001': ['FAIL', known_reason],
         'pool_checkpoint/checkpoint_big_rewind': ['FAIL', '12622'],
         'pool_checkpoint/checkpoint_indirect': ['FAIL', '12623'],
+        'snapshot/snapshot_002_pos': ['FAIL', '14831'],
     })
 elif sys.platform.startswith('linux'):
     maybe.update({
         'cli_root/zfs_rename/zfs_rename_002_pos': ['FAIL', known_reason],
         'cli_root/zpool_reopen/zpool_reopen_003_pos': ['FAIL', known_reason],
-        'fault/auto_spare_shared': ['FAIL', '11889'],
+        'fault/auto_online_002_pos': ['FAIL', 11889],
+        'fault/auto_replace_001_pos': ['FAIL', 14851],
+        'fault/auto_spare_002_pos': ['FAIL', 11889],
+        'fault/auto_spare_multiple': ['FAIL', 11889],
+        'fault/auto_spare_shared': ['FAIL', 11889],
+        'fault/decompress_fault': ['FAIL', 11889],
         'io/io_uring': ['SKIP', 'io_uring support required'],
         'limits/filesystem_limit': ['SKIP', known_reason],
         'limits/snapshot_limit': ['SKIP', known_reason],
diff --git a/sys/contrib/openzfs/tests/zfs-tests/cmd/Makefile.am b/sys/contrib/openzfs/tests/zfs-tests/cmd/Makefile.am
index d1c29fcd1c62..7ec4cb6190a8 100644
--- a/sys/contrib/openzfs/tests/zfs-tests/cmd/Makefile.am
+++ b/sys/contrib/openzfs/tests/zfs-tests/cmd/Makefile.am
@@ -20,6 +20,7 @@ SUBDIRS = \
 	mmap_exec \
 	mmap_libaio \
 	mmap_seek \
+	mmap_sync \
 	mmapwrite \
 	nvlist_to_lua \
 	randwritecomp \
diff --git a/sys/contrib/openzfs/tests/zfs-tests/cmd/mmap_sync/.gitignore b/sys/contrib/openzfs/tests/zfs-tests/cmd/mmap_sync/.gitignore
new file mode 100644
index 000000000000..c721f472ba44
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/cmd/mmap_sync/.gitignore
@@ -0,0 +1 @@
+/mmap_sync
diff --git a/sys/contrib/openzfs/tests/zfs-tests/cmd/mmap_sync/Makefile.am b/sys/contrib/openzfs/tests/zfs-tests/cmd/mmap_sync/Makefile.am
new file mode 100644
index 000000000000..313e8db5c0f4
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/cmd/mmap_sync/Makefile.am
@@ -0,0 +1,6 @@
+include $(top_srcdir)/config/Rules.am
+
+pkgexecdir = $(datadir)/@PACKAGE@/zfs-tests/bin
+
+pkgexec_PROGRAMS = mmap_sync
+mmap_sync_SOURCES = mmap_sync.c
diff --git a/sys/contrib/openzfs/tests/zfs-tests/cmd/mmap_sync/mmap_sync.c b/sys/contrib/openzfs/tests/zfs-tests/cmd/mmap_sync/mmap_sync.c
new file mode 100644
index 000000000000..226e71be2f57
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/cmd/mmap_sync/mmap_sync.c
@@ -0,0 +1,152 @@
+/*
+ * 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://opensource.org/licenses/CDDL-1.0.
+ * 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
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <time.h>
+
+static void
+cleanup(char *file)
+{
+	(void) remove(file);
+}
+
+int
+main(int argc, char *argv[])
+{
+	char *testdir = getenv("TESTDIR");
+	if (!testdir) {
+		fprintf(stderr, "environment variable TESTDIR not set\n");
+		return (1);
+	}
+
+	struct stat st;
+	umask(0);
+	if (stat(testdir, &st) != 0 &&
+	    mkdir(testdir, 0777) != 0) {
+		perror("mkdir");
+		return (1);
+	}
+
+	if (argc > 3) {
+		fprintf(stderr, "usage: %s "
+		    "[run time in mins] "
+		    "[max msync time in ms]\n", argv[0]);
+		return (1);
+	}
+
+	int run_time_mins = 1;
+	if (argc >= 2) {
+		run_time_mins = atoi(argv[1]);
+	}
+
+	int max_msync_time_ms = 1000;
+	if (argc >= 3) {
+		max_msync_time_ms = atoi(argv[2]);
+	}
+
+	char filepath[512];
+	filepath[0] = '\0';
+	char *file = &filepath[0];
+
+	(void) snprintf(file, 512, "%s/msync_file", testdir);
+
+	const int LEN = 8;
+	cleanup(file);
+
+	int fd = open(file, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR |
+	    S_IRGRP | S_IROTH);
+
+	if (fd == -1) {
+		(void) fprintf(stderr, "%s: %s: ", argv[0], file);
+		perror("open");
+		return (1);
+	}
+
+	if (ftruncate(fd, LEN) != 0) {
+		perror("ftruncate");
+		cleanup(file);
+		return (1);
+	}
+
+	void *ptr = mmap(NULL, LEN, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+
+	if (ptr == MAP_FAILED) {
+		perror("mmap");
+		cleanup(file);
+		return (1);
+	}
+
+	struct timeval tstart;
+	gettimeofday(&tstart, NULL);
+
+	long long x = 0LL;
+
+	for (;;) {
+		*((long long *)ptr) = x;
+		x++;
+
+		struct timeval t1, t2;
+		gettimeofday(&t1, NULL);
+		if (msync(ptr, LEN, MS_SYNC|MS_INVALIDATE) != 0) {
+			perror("msync");
+			cleanup(file);
+			return (1);
+		}
+
+		gettimeofday(&t2, NULL);
+
+		double elapsed = (t2.tv_sec - t1.tv_sec) * 1000.0;
+		elapsed += ((t2.tv_usec - t1.tv_usec) / 1000.0);
+		if (elapsed > max_msync_time_ms) {
+			fprintf(stderr, "slow msync: %f ms\n", elapsed);
+			if (munmap(ptr, LEN) != 0)
+				perror("munmap");
+			cleanup(file);
+			return (1);
+		}
+
+		double elapsed_start = (t2.tv_sec - tstart.tv_sec) * 1000.0;
+		elapsed_start += ((t2.tv_usec - tstart.tv_usec) / 1000.0);
+		if (elapsed_start > run_time_mins * 60 * 1000) {
+			break;
+		}
+	}
+
+	if (munmap(ptr, LEN) != 0) {
+		perror("munmap");
+		cleanup(file);
+		return (1);
+	}
+
+	if (close(fd) != 0) {
+		perror("close");
+	}
+
+	cleanup(file);
+	return (0);
+}
diff --git a/sys/contrib/openzfs/tests/zfs-tests/include/commands.cfg b/sys/contrib/openzfs/tests/zfs-tests/include/commands.cfg
index 78802c9fb942..8ac38dfd8934 100644
--- a/sys/contrib/openzfs/tests/zfs-tests/include/commands.cfg
+++ b/sys/contrib/openzfs/tests/zfs-tests/include/commands.cfg
@@ -207,6 +207,7 @@ export ZFSTEST_FILES='badsend
     mmap_exec
     mmap_libaio
     mmap_seek
+    mmap_sync
     mmapwrite
     nvlist_to_lua
     randfree_file
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/Makefile.am b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/Makefile.am
index 7cffb2eac450..82fd9f340269 100644
--- a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/Makefile.am
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/Makefile.am
@@ -14,7 +14,9 @@ dist_pkgdata_SCRIPTS = \
 	alloc_class_010_pos.ksh \
 	alloc_class_011_neg.ksh \
 	alloc_class_012_pos.ksh \
-	alloc_class_013_pos.ksh
+	alloc_class_013_pos.ksh \
+	alloc_class_014_neg.ksh \
+	alloc_class_015_pos.ksh
 
 dist_pkgdata_DATA = \
 	alloc_class.cfg \
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/alloc_class_013_pos.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/alloc_class_013_pos.ksh
index 2ce22a624291..790a47f26576 100755
--- a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/alloc_class_013_pos.ksh
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/alloc_class_013_pos.ksh
@@ -42,7 +42,8 @@ log_must display_status "$TESTPOOL"
 
 log_must zfs create -o dedup=on -V 2G $TESTPOOL/$TESTVOL
 
-log_must eval "new_fs $ZVOL_DEVDIR/$TESTPOOL/$TESTVOL >/dev/null 2>&1"
+block_device_wait "$ZVOL_DEVDIR/$TESTPOOL/$TESTVOL"
+log_must eval "new_fs $ZVOL_DEVDIR/$TESTPOOL/$TESTVOL >/dev/null"
 
 sync_pool
 log_must zpool list -v $TESTPOOL
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/alloc_class_014_neg.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/alloc_class_014_neg.ksh
new file mode 100755
index 000000000000..1b52014fd2d9
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/alloc_class_014_neg.ksh
@@ -0,0 +1,38 @@
+#!/bin/ksh -p
+
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+. $STF_SUITE/tests/functional/alloc_class/alloc_class.kshlib
+
+#
+# DESCRIPTION:
+#	Setting the special_small_blocks property greater than recordsize fails.
+#
+
+verify_runnable "global"
+
+claim="Setting the special_small_blocks property greater than recordsize fails"
+
+log_assert $claim
+log_onexit cleanup
+log_must disk_setup
+
+for size in 512 4096 32768 131072 524288 1048576
+do
+	let bigger=$size*2
+	log_mustnot zpool create -O recordsize=$size \
+		-O special_small_blocks=$bigger \
+		$TESTPOOL raidz $ZPOOL_DISKS special mirror \
+		$CLASS_DISK0 $CLASS_DISK1
+done
+
+log_pass $claim
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/alloc_class_015_pos.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/alloc_class_015_pos.ksh
new file mode 100755
index 000000000000..49c468af6702
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/alloc_class/alloc_class_015_pos.ksh
@@ -0,0 +1,45 @@
+#!/bin/ksh -p
+
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+. $STF_SUITE/tests/functional/alloc_class/alloc_class.kshlib
+
+#
+# DESCRIPTION:
+# 	Can set special_small_blocks property less than or equal to recordsize.
+#
+
+verify_runnable "global"
+
+claim="Can set special_small_blocks property less than or equal to recordsize"
+
+log_assert $claim
+log_onexit cleanup
+log_must disk_setup
+
+for size in 8192 32768 131072 524288 1048576
+do
+	let smaller=$size/2
+	log_must zpool create -O recordsize=$size \
+		-O special_small_blocks=$smaller \
+		$TESTPOOL raidz $ZPOOL_DISKS special mirror \
+		$CLASS_DISK0 $CLASS_DISK1
+	log_must zpool destroy -f "$TESTPOOL"
+
+	log_must zpool create -O recordsize=$size \
+		-O special_small_blocks=$size \
+		$TESTPOOL raidz $ZPOOL_DISKS special mirror \
+		$CLASS_DISK0 $CLASS_DISK1
+	log_must zpool destroy -f "$TESTPOOL"
+done
+
+log_pass $claim
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_import/Makefile.am b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_import/Makefile.am
index a8c9a31dcfdc..4230ec5575f6 100644
--- a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_import/Makefile.am
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_import/Makefile.am
@@ -12,6 +12,7 @@ dist_pkgdata_SCRIPTS = \
 	import_cachefile_paths_changed.ksh \
 	import_cachefile_shared_device.ksh \
 	import_devices_missing.ksh \
+	import_log_missing.ksh \
 	import_paths_changed.ksh \
 	import_rewind_config_changed.ksh \
 	import_rewind_device_replaced.ksh \
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_import/import_log_missing.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_import/import_log_missing.ksh
new file mode 100755
index 000000000000..f12cac78540f
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_import/import_log_missing.ksh
@@ -0,0 +1,75 @@
+#!/bin/ksh -p
+
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+. $STF_SUITE/tests/functional/cli_root/zpool_import/zpool_import.kshlib
+
+#
+# DESCRIPTION:
+#	Import with missing log device should not remove spare/cache.
+#
+# STRATEGY:
+#	1. Create a pool.
+#	2. Add spare, cache and log devices to the pool.
+#	3. Export the pool.
+#	4. Remove the log device.
+#	5. Import the pool with -m flag.
+#	6. Verify that spare and cache are still present in the pool.
+#
+
+verify_runnable "global"
+
+log_onexit cleanup
+
+function test_missing_log
+{
+	typeset poolcreate="$1"
+	typeset cachevdev="$2"
+	typeset sparevdev="$3"
+	typeset logvdev="$4"
+	typeset missingvdev="$4"
+
+	log_note "$0: pool '$poolcreate', adding $cachevdev, $sparevdev," \
+		"$logvdev then moving away $missingvdev."
+
+	log_must zpool create $TESTPOOL1 $poolcreate
+
+	log_must zpool add $TESTPOOL1 cache $cachevdev spare $sparevdev \
+		log $logvdev
+
+	log_must_busy zpool export $TESTPOOL1
+
+	log_must mv $missingvdev $BACKUP_DEVICE_DIR
+
+	log_must zpool import -m -d $DEVICE_DIR $TESTPOOL1
+
+	CACHE_PRESENT=$(zpool status -v $TESTPOOL1 | grep $cachevdev)
+
+	SPARE_PRESENT=$(zpool status -v $TESTPOOL1 | grep $sparevdev)
+
+	if [ -z "$CACHE_PRESENT"] || [ -z "SPARE_PRESENT"]
+	then
+		log_fail "cache/spare vdev missing after importing with missing" \
+			"log device"
+	fi
+
+	# Cleanup
+	log_must zpool destroy $TESTPOOL1
+
+	log_note ""
+}
+
+log_must mkdir -p $BACKUP_DEVICE_DIR
+
+test_missing_log "$VDEV0" "$VDEV1" "$VDEV2" "$VDEV3"
+
+log_pass "zpool import succeeded with missing log device"
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_initialize/Makefile.am b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_initialize/Makefile.am
index 3968902ec36d..483c1c2f5914 100644
--- a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_initialize/Makefile.am
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_initialize/Makefile.am
@@ -10,6 +10,7 @@ dist_pkgdata_SCRIPTS = \
 	zpool_initialize_start_and_cancel_neg.ksh \
 	zpool_initialize_start_and_cancel_pos.ksh \
 	zpool_initialize_suspend_resume.ksh \
+	zpool_initialize_uninit.ksh \
 	zpool_initialize_unsupported_vdevs.ksh \
 	zpool_initialize_verify_checksums.ksh \
 	zpool_initialize_verify_initialized.ksh
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_initialize/zpool_initialize_uninit.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_initialize/zpool_initialize_uninit.ksh
new file mode 100755
index 000000000000..17f776cfbc20
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_initialize/zpool_initialize_uninit.ksh
@@ -0,0 +1,141 @@
+#!/bin/ksh -p
+#
+# 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 https://opensource.org/licenses/CDDL-1.0.
+# 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) 2016 by Delphix. All rights reserved.
+# Copyright (C) 2023 Lawrence Livermore National Security, LLC.
+#
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/cli_root/zpool_initialize/zpool_initialize.kshlib
+
+#
+# DESCRIPTION:
+# Starting, stopping, uninitializing, and restart an initialize works.
+#
+# STRATEGY:
+# 1. Create a one-disk pool.
+# 2. Verify uninitialize succeeds for uninitialized pool.
+# 3. Verify pool wide cancel|suspend + uninit
+#   a. Start initializing and verify that initializing is active.
+#   b. Verify uninitialize fails when actively initializing.
+#   c. Cancel or suspend initializing and verify that initializing is not active.
+#   d. Verify uninitialize succeeds after being cancelled.
+# 4. Verify per-disk cancel|suspend + uninit
+#
+
+DISK1="$(echo $DISKS | cut -d' ' -f1)"
+DISK2="$(echo $DISKS | cut -d' ' -f2)"
+DISK3="$(echo $DISKS | cut -d' ' -f3)"
+
+function status_check # pool disk1-state disk2-state disk3-state
+{
+        typeset pool="$1"
+        typeset disk1_state="$2"
+        typeset disk2_state="$3"
+        typeset disk3_state="$4"
+
+	state=$(zpool status -i "$pool" | grep "$DISK1" | grep "$disk1_state")
+        if [[ -z "$state" ]]; then
+		log_fail "DISK1 state; expected='$disk1_state' got '$state'"
+	fi
+
+	state=$(zpool status -i "$pool" | grep "$DISK2" | grep "$disk2_state")
+        if [[ -z "$state" ]]; then
+		log_fail "DISK2 state; expected='$disk2_state' got '$state'"
+	fi
+
+	state=$(zpool status -i "$pool" | grep "$DISK3" | grep "$disk3_state")
+        if [[ -z "$state" ]]; then
+		log_fail "DISK3 state; expected='$disk3_state' got '$state'"
+	fi
+}
+
+function status_check_all # pool disk-state
+{
+        typeset pool="$1"
+        typeset disk_state="$2"
+
+	status_check "$pool" "$disk_state" "$disk_state" "$disk_state"
+}
+
+# 1. Create a one-disk pool.
+log_must zpool create -f $TESTPOOL $DISK1 $DISK2 $DISK3
+status_check_all $TESTPOOL "uninitialized"
+
+# 2. Verify uninitialize succeeds for uninitialized pool.
+log_must zpool initialize -u $TESTPOOL
+status_check_all $TESTPOOL "uninitialized"
+
+# 3. Verify pool wide cancel + uninit
+log_must zpool initialize $TESTPOOL
+status_check_all $TESTPOOL "[[:digit:]]* initialized"
+
+log_mustnot zpool initialize -u $TESTPOOL
+status_check_all $TESTPOOL "[[:digit:]]* initialized"
+
+log_must zpool initialize -c $TESTPOOL
+status_check_all $TESTPOOL "uninitialized"
+
+log_must zpool initialize -u $TESTPOOL
+status_check_all $TESTPOOL "uninitialized"
+
+# 3. Verify pool wide suspend + uninit
+log_must zpool initialize $TESTPOOL
+status_check_all $TESTPOOL "[[:digit:]]* initialized"
+
+log_mustnot zpool initialize -u $TESTPOOL
+status_check_all $TESTPOOL "[[:digit:]]* initialized"
+
+log_must zpool initialize -s $TESTPOOL
+status_check_all $TESTPOOL "suspended"
+
+log_must zpool initialize -u $TESTPOOL
+status_check_all $TESTPOOL "uninitialized"
+
+# 4. Verify per-disk cancel|suspend + uninit
+log_must zpool initialize $TESTPOOL
+status_check_all $TESTPOOL "[[:digit:]]* initialized"
+
+log_must zpool initialize -c $TESTPOOL $DISK1
+log_must zpool initialize -s $TESTPOOL $DISK2
+log_mustnot zpool initialize -u $TESTPOOL $DISK3
+status_check $TESTPOOL "uninitialized" "suspended" "[[:digit:]]* initialized"
+
+log_must zpool initialize -u $TESTPOOL $DISK1
+status_check $TESTPOOL "uninitialized" "suspended" "[[:digit:]]* initialized"
+
+log_must zpool initialize -u $TESTPOOL $DISK2
+status_check $TESTPOOL "uninitialized" "uninitialized" "[[:digit:]]* initialized"
+
+log_must zpool initialize $TESTPOOL $DISK1
+status_check $TESTPOOL "[[:digit:]]* initialized" "uninitialized" "[[:digit:]]* initialized"
+
+log_must zpool initialize $TESTPOOL $DISK2
+status_check_all $TESTPOOL "[[:digit:]]* initialized"
+
+log_must zpool initialize -s $TESTPOOL
+status_check_all $TESTPOOL "suspended"
+
+log_must zpool initialize -u $TESTPOOL $DISK1 $DISK2 $DISK3
+status_check_all $TESTPOOL "uninitialized"
+
+log_pass "Initialize start + cancel/suspend + uninit + start works"
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_resilver/Makefile.am b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_resilver/Makefile.am
index 2cec5335fbae..7ca9e81c1867 100644
--- a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_resilver/Makefile.am
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_resilver/Makefile.am
@@ -3,7 +3,8 @@ dist_pkgdata_SCRIPTS = \
 	setup.ksh \
 	cleanup.ksh \
 	zpool_resilver_bad_args.ksh \
-	zpool_resilver_restart.ksh
+	zpool_resilver_restart.ksh \
+	zpool_resilver_concurrent.ksh
 
 dist_pkgdata_DATA = \
 	zpool_resilver.cfg
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_resilver/zpool_resilver_concurrent.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_resilver/zpool_resilver_concurrent.ksh
new file mode 100755
index 000000000000..4c3b09796869
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_resilver/zpool_resilver_concurrent.ksh
@@ -0,0 +1,101 @@
+#!/bin/ksh -p
+#
+# 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) 2023 Hewlett Packard Enterprise Development LP.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/redundancy/redundancy.kshlib
+
+#
+# DESCRIPTION:
+#	Verify 'zpool clear' doesn't cause concurrent resilvers
+#
+# STRATEGY:
+#	1. Create N(10) virtual disk files.
+#	2. Create draid pool based on the virtual disk files.
+#	3. Fill the filesystem with directories and files.
+#	4. Force-fault 2 vdevs and verify distributed spare is kicked in.
+#	5. Free the distributed spare by replacing the faulty drive.
+#	6. Run zpool clear and verify that it does not initiate 2 resilvers
+#	   concurrently while distributed spare gets kicked in.
+#
+
+verify_runnable "global"
+
+typeset -ir devs=10
+typeset -ir nparity=1
+typeset -ir ndata=8
+typeset -ir dspare=1
+
+function cleanup
+{
+	poolexists "$TESTPOOL" && destroy_pool "$TESTPOOL"
+
+	for i in {0..$devs}; do
+		log_must rm -f "$BASEDIR/vdev$i"
+	done
+
+	for dir in $BASEDIR; do
+		if [[ -d $dir ]]; then
+			log_must rm -rf $dir
+		fi
+	done
+
+	zed_stop
+	zed_cleanup
+}
+
+log_assert "Verify zpool clear on draid pool doesn't cause concurrent resilvers"
+log_onexit cleanup
+
+setup_test_env $TESTPOOL draid${nparity}:${ndata}d:${dspare}s $devs
+
+# ZED needed for sequential resilver
+zed_setup
+log_must zed_start
+
+log_must zpool offline -f $TESTPOOL $BASEDIR/vdev5
+log_must wait_vdev_state  $TESTPOOL draid1-0-0 "ONLINE" 60
+log_must zpool wait -t resilver $TESTPOOL
+log_must zpool offline -f $TESTPOOL $BASEDIR/vdev6
+
+log_must zpool labelclear -f $BASEDIR/vdev5
+log_must zpool labelclear -f $BASEDIR/vdev6
+
+log_must zpool replace -w $TESTPOOL $BASEDIR/vdev5
+sync_pool $TESTPOOL
+
+log_must zpool events -c
+log_must zpool clear $TESTPOOL
+log_must wait_vdev_state  $TESTPOOL draid1-0-0 "ONLINE" 60
+log_must zpool wait -t resilver $TESTPOOL
+log_must zpool wait -t scrub $TESTPOOL
+
+nof_resilver=$(zpool events | grep -c resilver_start)
+if [ $nof_resilver = 1 ] ; then
+	log_must verify_pool $TESTPOOL
+	log_pass "zpool clear on draid pool doesn't cause concurrent resilvers"
+else
+	log_fail "FAIL: sequential and healing resilver initiated concurrently"
+fi
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_trim/zpool_trim_start_and_cancel_pos.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_trim/zpool_trim_start_and_cancel_pos.ksh
index fbb0c291046c..19781137d3ca 100755
--- a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_trim/zpool_trim_start_and_cancel_pos.ksh
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/cli_root/zpool_trim/zpool_trim_start_and_cancel_pos.ksh
@@ -35,7 +35,7 @@
 DISK1=${DISKS%% *}
 
 log_must zpool create -f $TESTPOOL $DISK1
-log_must zpool trim $TESTPOOL
+log_must zpool trim -r 1 $TESTPOOL
 
 [[ -z "$(trim_progress $TESTPOOL $DISK1)" ]] && \
     log_fail "TRIM did not start"
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmap/Makefile.am b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmap/Makefile.am
index b26791ee7ce0..526405954c08 100644
--- a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmap/Makefile.am
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmap/Makefile.am
@@ -2,10 +2,12 @@ pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/functional/mmap
 dist_pkgdata_SCRIPTS = \
 	setup.ksh \
 	cleanup.ksh \
+	mmap_mixed.ksh \
 	mmap_read_001_pos.ksh \
 	mmap_write_001_pos.ksh \
 	mmap_libaio_001_pos.ksh \
-	mmap_seek_001_pos.ksh
+	mmap_seek_001_pos.ksh \
+	mmap_sync_001_pos.ksh
 
 dist_pkgdata_DATA = \
 	mmap.cfg
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmap/mmap_mixed.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmap/mmap_mixed.ksh
new file mode 100755
index 000000000000..6c8246d48acf
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmap/mmap_mixed.ksh
@@ -0,0 +1,86 @@
+#!/bin/ksh -p
+#
+# 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 https://opensource.org/licenses/CDDL-1.0.
+# 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) 2023 by Lawrence Livermore National Security, LLC.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/mmap/mmap.cfg
+
+#
+# DESCRIPTION:
+# 	Verify mixed buffered and mmap IO.
+#
+# STRATEGY:
+#	1. Create an empty file.
+#	2. Start a background buffered read/write fio to the file.
+#	3. Start a background mmap read/write fio to the file.
+#
+
+verify_runnable "global"
+
+function cleanup
+{
+	log_must rm -f "$tmp_file"
+}
+
+log_assert "Verify mixed buffered and mmap IO"
+
+log_onexit cleanup
+
+mntpnt=$(get_prop mountpoint $TESTPOOL/$TESTFS)
+tmp_file=$mntpnt/file
+bs=$((128 * 1024))
+blocks=64
+size=$((bs * blocks))
+runtime=60
+
+log_must dd if=/dev/zero of=$tmp_file bs=$bs count=$blocks
+
+# Buffered IO writes
+log_must eval "fio --filename=$tmp_file --name=buffer-write \
+	--rw=randwrite --size=$size --bs=$bs --direct=0 --numjobs=1 \
+	--ioengine=sync --fallocate=none --group_reporting --minimal \
+	--runtime=$runtime --time_based --norandommap &"
+
+# Buffered IO reads
+log_must eval "fio --filename=$tmp_file --name=buffer-read \
+	--rw=randread --size=$size --bs=$bs --direct=0 --numjobs=1 \
+	--ioengine=sync --fallocate=none --group_reporting --minimal \
+	--runtime=$runtime --time_based --norandommap &"
+
+# mmap IO writes
+log_must eval "fio --filename=$tmp_file --name=mmap-write \
+	--rw=randwrite --size=$size --bs=$bs --numjobs=1 \
+	--ioengine=mmap --fallocate=none --group_reporting --minimal \
+	--runtime=$runtime --time_based --norandommap &"
+
+# mmap IO reads
+log_must eval "fio --filename=$tmp_file --name=mmap-read \
+	--rw=randread --size=$size --bs=$bs --numjobs=1 \
+	--ioengine=mmap --fallocate=none --group_reporting --minimal \
+	--runtime=$runtime --time_based --norandommap &"
+
+log_must wait
+
+log_pass "Verfied mixed buffered and mmap IO"
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmap/mmap_sync_001_pos.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmap/mmap_sync_001_pos.ksh
new file mode 100755
index 000000000000..b764d6607ba6
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/mmap/mmap_sync_001_pos.ksh
@@ -0,0 +1,63 @@
+#!/bin/ksh -p
+
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+#
+# Copyright (c) 2015, 2016 by Delphix. All rights reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+
+#
+# DESCRIPTION:
+# msync()s of mmap()'ed file should complete quickly during
+# background dirty page writebacks by the kernel.
+#
+
+function cleanup
+{
+	log_must eval "echo $saved_vm_dirty_expire_centisecs > /proc/sys/vm/dirty_expire_centisecs"
+	log_must eval "echo $saved_vm_dirty_background_ratio > /proc/sys/vm/dirty_background_ratio"
+	log_must eval "echo $saved_vm_dirty_writeback_centisecs > /proc/sys/vm/dirty_writeback_centisecs"
+
+	# revert to some sensible defaults if the values we saved
+	# were incorrect due to a previous run being interrupted
+	if [ $(</proc/sys/vm/dirty_expire_centisecs) -eq 1 ]; then
+		log_must eval "echo 3000 > /proc/sys/vm/dirty_expire_centisecs"
+	fi
+
+	if [ $(</proc/sys/vm/dirty_background_ratio) -eq 0 ]; then
+		log_must eval "echo 10 > /proc/sys/vm/dirty_background_ratio"
+	fi
+
+	if [ $(</proc/sys/vm/dirty_writeback_centisecs) -eq 1 ]; then
+		log_must eval "echo 500 > /proc/sys/vm/dirty_writeback_centisecs"
+	fi
+}
+
+if ! is_linux; then
+	log_unsupported "Only supported on Linux, requires /proc/sys/vm/ tunables"
+fi
+
+log_onexit cleanup
+log_assert "Run the tests for mmap_sync"
+
+read -r saved_vm_dirty_expire_centisecs < /proc/sys/vm/dirty_expire_centisecs
+read -r saved_vm_dirty_background_ratio < /proc/sys/vm/dirty_background_ratio
+read -r saved_vm_dirty_writeback_centisecs < /proc/sys/vm/dirty_writeback_centisecs
+
+log_must eval "echo 1 > /proc/sys/vm/dirty_expire_centisecs"
+log_must eval "echo 1 > /proc/sys/vm/dirty_background_bytes"
+log_must eval "echo 1 > /proc/sys/vm/dirty_writeback_centisecs"
+
+log_must mmap_sync
+log_pass "mmap_sync tests passed."
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/rsend/Makefile.am b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/rsend/Makefile.am
index d80d2124e291..2cedf03d3d69 100644
--- a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/rsend/Makefile.am
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/rsend/Makefile.am
@@ -25,6 +25,7 @@ dist_pkgdata_SCRIPTS = \
 	rsend_022_pos.ksh \
 	rsend_024_pos.ksh \
 	send_encrypted_files.ksh \
+	send_encrypted_freeobjects.ksh \
 	send_encrypted_hierarchy.ksh \
 	send_encrypted_props.ksh \
 	send_encrypted_truncated_files.ksh \
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/rsend/send-c_volume.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/rsend/send-c_volume.ksh
index 988ed91b9918..1bf234823459 100755
--- a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/rsend/send-c_volume.ksh
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/rsend/send-c_volume.ksh
@@ -29,6 +29,7 @@
 
 function cleanup
 {
+	rm $BACKDIR/copy
 	log_must_busy zfs destroy -r $vol
 	cleanup_pool $POOL2
 }
@@ -60,7 +61,9 @@ log_must eval "zfs recv -d $POOL2 <$BACKDIR/full"
 
 verify_stream_size $BACKDIR/full $vol
 verify_stream_size $BACKDIR/full $vol2
-md5=$(dd if=$voldev2 bs=1024k count=$megs 2>/dev/null | md5digest)
+block_device_wait $voldev2
+log_must dd if=$voldev2 of=$BACKDIR/copy bs=1024k count=$megs
+md5=$(md5digest $BACKDIR/copy)
 [[ $md5 = $md5_1 ]] || log_fail "md5 mismatch: $md5 != $md5_1"
 
 # Repeat, for an incremental send
@@ -72,7 +75,9 @@ log_must eval "zfs recv -d $POOL2 <$BACKDIR/inc"
 
 verify_stream_size $BACKDIR/inc $vol 90 $vol@snap
 verify_stream_size $BACKDIR/inc $vol2 90 $vol2@snap
-md5=$(dd skip=$megs if=$voldev2 bs=1024k count=$megs 2>/dev/null | md5digest)
+block_device_wait $voldev2
+log_must dd skip=$megs if=$voldev2 of=$BACKDIR/copy bs=1024k count=$megs
+md5=$(md5digest $BACKDIR/copy)
 [[ $md5 = $md5_2 ]] || log_fail "md5 mismatch: $md5 != $md5_2"
 
 log_pass "Verify compressed send works with volumes"
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/rsend/send_encrypted_freeobjects.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/rsend/send_encrypted_freeobjects.ksh
new file mode 100755
index 000000000000..92451bd1ab6f
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/rsend/send_encrypted_freeobjects.ksh
@@ -0,0 +1,87 @@
+#!/bin/ksh
+
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+#
+# Copyright (c) 2017 by Lawrence Livermore National Security, LLC.
+# Copyright (c) 2023 by Findity AB
+#
+
+. $STF_SUITE/tests/functional/rsend/rsend.kshlib
+
+#
+# Description:
+# Verify that receiving a raw encrypted stream, with a FREEOBJECTS
+# removing all existing objects in a block followed by an OBJECT write
+# to the same block, does not result in a panic.
+#
+# Strategy:
+# 1. Create a new encrypted filesystem
+# 2. Create file f1 as the first object in some block (here object 128)
+# 3. Take snapshot A
+# 4. Create file f2 as the second object in the same block (here object 129)
+# 5. Delete f1
+# 6. Take snapshot B
+# 7. Receive a full raw encrypted send of A
+# 8. Receive an incremental raw send of B
+#
+verify_runnable "both"
+
+function create_object_with_num
+{
+	file=$1
+	num=$2
+
+	tries=100
+	for ((i=0; i<$tries; i++)); do
+		touch $file
+		onum=$(ls -li $file | awk '{print $1}')
+
+		if [[ $onum -ne $num ]] ; then
+			rm -f $file
+		else
+			break
+		fi
+	done
+	if [[ $i -eq $tries ]]; then
+		log_fail "Failed to create object with number $num"
+	fi
+}
+
+log_assert "FREEOBJECTS followed by OBJECT in encrypted stream does not crash"
+
+sendds=sendencfods
+recvds=recvencfods
+keyfile=/$POOL/keyencfods
+f1=/$POOL/$sendds/f1
+f2=/$POOL/$sendds/f2
+
+log_must eval "echo 'password' > $keyfile"
+
+#
+# xattr=sa and dnodesize=legacy for sequential object numbers, see
+# note in send_freeobjects.ksh.
+#
+log_must zfs create -o xattr=sa -o dnodesize=legacy -o encryption=on \
+	-o keyformat=passphrase -o keylocation=file://$keyfile $POOL/$sendds
+
+create_object_with_num $f1 128
+log_must zfs snap $POOL/$sendds@A
+create_object_with_num $f2 129
+log_must rm $f1
+log_must zfs snap $POOL/$sendds@B
+
+log_must eval "zfs send -w $POOL/$sendds@A | zfs recv $POOL/$recvds"
+log_must eval "zfs send -w -i $POOL/$sendds@A $POOL/$sendds@B |" \
+	"zfs recv $POOL/$recvds"
+
+log_pass "FREEOBJECTS followed by OBJECT in encrypted stream did not crash"
diff --git a/sys/modules/zfs/zfs_config.h b/sys/modules/zfs/zfs_config.h
index 36a8a00a1d44..cc4b81a2cb8a 100644
--- a/sys/modules/zfs/zfs_config.h
+++ b/sys/modules/zfs/zfs_config.h
@@ -238,6 +238,9 @@
 /* copy_to_iter() is available */
 /* #undef HAVE_COPY_TO_ITER */
 
+/* cpu_has_feature() is GPL-only */
+/* #undef HAVE_CPU_HAS_FEATURE_GPL_ONLY */
+
 /* yes */
 /* #undef HAVE_CPU_HOTPLUG */
 
@@ -293,6 +296,9 @@
 /* fault_in_iov_iter_readable() is available */
 /* #undef HAVE_FAULT_IN_IOV_ITER_READABLE */
 
+/* filemap_range_has_page() is available */
+/* #undef HAVE_FILEMAP_RANGE_HAS_PAGE */
+
 /* fops->aio_fsync() exists */
 /* #undef HAVE_FILE_AIO_FSYNC */
 
@@ -302,6 +308,9 @@
 /* file_inode() is available */
 /* #undef HAVE_FILE_INODE */
 
+/* flush_dcache_page() is GPL-only */
+/* #undef HAVE_FLUSH_DCACHE_PAGE_GPL_ONLY */
+
 /* iops->follow_link() cookie */
 /* #undef HAVE_FOLLOW_LINK_COOKIE */
 
@@ -314,6 +323,9 @@
 /* fops->fsync() without dentry */
 /* #undef HAVE_FSYNC_WITHOUT_DENTRY */
 
+/* generic_fillattr requires struct mnt_idmap* */
+/* #undef HAVE_GENERIC_FILLATTR_IDMAP */
+
 /* generic_fillattr requires struct user_namespace* */
 /* #undef HAVE_GENERIC_FILLATTR_USERNS */
 
@@ -359,6 +371,15 @@
 /* Define if you have the iconv() function and it works. */
 #define HAVE_ICONV 1
 
+/* iops->getattr() takes struct mnt_idmap* */
+/* #undef HAVE_IDMAP_IOPS_GETATTR */
+
+/* iops->setattr() takes struct mnt_idmap* */
+/* #undef HAVE_IDMAP_IOPS_SETATTR */
+
+/* Define if compiler supports -Wimplicit-fallthrough */
+/* #define HAVE_IMPLICIT_FALLTHROUGH 1 */
+
 /* Define if compiler supports -Winfinite-recursion */
 /* #undef HAVE_INFINITE_RECURSION */
 
@@ -368,8 +389,11 @@
 /* inode_owner_or_capable() exists */
 /* #undef HAVE_INODE_OWNER_OR_CAPABLE */
 
+/* inode_owner_or_capable() takes mnt_idmap */
+/* #undef HAVE_INODE_OWNER_OR_CAPABLE_IDMAP */
+
 /* inode_owner_or_capable() takes user_ns */
-/* #undef HAVE_INODE_OWNER_OR_CAPABLE_IDMAPPED */
+/* #undef HAVE_INODE_OWNER_OR_CAPABLE_USERNS */
 
 /* inode_set_flags() exists */
 /* #undef HAVE_INODE_SET_FLAGS */
@@ -389,18 +413,36 @@
 /* in_compat_syscall() is available */
 /* #undef HAVE_IN_COMPAT_SYSCALL */
 
+/* iops->create() takes struct mnt_idmap* */
+/* #undef HAVE_IOPS_CREATE_IDMAP */
+
 /* iops->create() takes struct user_namespace* */
 /* #undef HAVE_IOPS_CREATE_USERNS */
 
+/* iops->mkdir() takes struct mnt_idmap* */
+/* #undef HAVE_IOPS_MKDIR_IDMAP */
+
 /* iops->mkdir() takes struct user_namespace* */
 /* #undef HAVE_IOPS_MKDIR_USERNS */
 
+/* iops->mknod() takes struct mnt_idmap* */
+/* #undef HAVE_IOPS_MKNOD_IDMAP */
+
 /* iops->mknod() takes struct user_namespace* */
 /* #undef HAVE_IOPS_MKNOD_USERNS */
 
+/* iops->rename() takes struct mnt_idmap* */
+/* #undef HAVE_IOPS_RENAME_IDMAP */
+
 /* iops->rename() takes struct user_namespace* */
 /* #undef HAVE_IOPS_RENAME_USERNS */
 
+/* iops->setattr() exists */
+/* #undef HAVE_IOPS_SETATTR */
+
+/* iops->symlink() takes struct mnt_idmap* */
+/* #undef HAVE_IOPS_SYMLINK_IDMAP */
+
 /* iops->symlink() takes struct user_namespace* */
 /* #undef HAVE_IOPS_SYMLINK_USERNS */
 
@@ -587,6 +629,9 @@
 /* qat is enabled and existed */
 /* #undef HAVE_QAT */
 
+/* struct reclaim_state has reclaimed */
+/* #undef HAVE_RECLAIM_STATE_RECLAIMED */
+
 /* register_shrinker is vararg */
 /* #undef HAVE_REGISTER_SHRINKER_VARARG */
 
@@ -629,6 +674,9 @@
 /* Define to 1 if you have the <security/pam_modules.h> header file. */
 #define HAVE_SECURITY_PAM_MODULES_H 1
 
+/* setattr_prepare() accepts mnt_idmap */
+/* #undef HAVE_SETATTR_PREPARE_IDMAP */
+
 /* setattr_prepare() is available, doesn't accept user_namespace */
 /* #undef HAVE_SETATTR_PREPARE_NO_USERNS */
 
@@ -638,6 +686,9 @@
 /* iops->set_acl() exists, takes 3 args */
 /* #undef HAVE_SET_ACL */
 
+/* iops->set_acl() takes 4 args, arg1 is struct mnt_idmap * */
+/* #undef HAVE_SET_ACL_IDMAP_DENTRY */
+
 /* iops->set_acl() takes 4 args */
 /* #undef HAVE_SET_ACL_USERNS */
 
@@ -736,6 +787,9 @@
 /* i_op->tmpfile() uses old dentry signature */
 /* #undef HAVE_TMPFILE_DENTRY */
 
+/* i_op->tmpfile() has mnt_idmap */
+/* #undef HAVE_TMPFILE_IDMAP */
+
 /* i_op->tmpfile() has userns */
 /* #undef HAVE_TMPFILE_USERNS */
 
@@ -757,6 +811,9 @@
 /* iops->getattr() takes struct user_namespace* */
 /* #undef HAVE_USERNS_IOPS_GETATTR */
 
+/* iops->setattr() takes struct user_namespace* */
+/* #undef HAVE_USERNS_IOPS_SETATTR */
+
 /* iops->getattr() takes a vfsmount */
 /* #undef HAVE_VFSMOUNT_IOPS_GETATTR */
 
@@ -811,6 +868,9 @@
 /* wq_head->head and wq_entry->entry exist */
 /* #undef HAVE_WAIT_QUEUE_HEAD_ENTRY */
 
+/* int (*writepage_t)() takes struct folio* */
+/* #undef HAVE_WRITEPAGE_T_FOLIO */
+
 /* xattr_handler->get() wants dentry */
 /* #undef HAVE_XATTR_GET_DENTRY */
 
@@ -844,6 +904,9 @@
 /* xattr_handler->set() wants xattr_handler */
 /* #undef HAVE_XATTR_SET_HANDLER */
 
+/* xattr_handler->set() takes mnt_idmap */
+/* #undef HAVE_XATTR_SET_IDMAP */
+
 /* xattr_handler->set() takes user_namespace */
 /* #undef HAVE_XATTR_SET_USERNS */
 
@@ -953,7 +1016,7 @@
 /* #undef ZFS_IS_GPL_COMPATIBLE */
 
 /* Define the project alias string. */
-#define ZFS_META_ALIAS "zfs-2.1.11-FreeBSD_ge25f9131d"
+#define ZFS_META_ALIAS "zfs-2.1.12-FreeBSD_g86783d7d9"
 
 /* Define the project author. */
 #define ZFS_META_AUTHOR "OpenZFS"
@@ -962,7 +1025,7 @@
 /* #undef ZFS_META_DATA */
 
 /* Define the maximum compatible kernel version. */
-#define ZFS_META_KVER_MAX "6.2"
+#define ZFS_META_KVER_MAX "6.3"
 
 /* Define the minimum compatible kernel version. */
 #define ZFS_META_KVER_MIN "3.10"
@@ -983,10 +1046,10 @@
 #define ZFS_META_NAME "zfs"
 
 /* Define the project release. */
-#define ZFS_META_RELEASE "FreeBSD_ge25f9131d"
+#define ZFS_META_RELEASE "FreeBSD_g86783d7d9"
 
 /* Define the project version. */
-#define ZFS_META_VERSION "2.1.11"
+#define ZFS_META_VERSION "2.1.12"
 
 /* count is located in percpu_ref.data */
 /* #undef ZFS_PERCPU_REF_COUNT_IN_DATA */
diff --git a/sys/modules/zfs/zfs_gitrev.h b/sys/modules/zfs/zfs_gitrev.h
index b04e2494c739..b67230d42727 100644
--- a/sys/modules/zfs/zfs_gitrev.h
+++ b/sys/modules/zfs/zfs_gitrev.h
@@ -1 +1 @@
-#define	ZFS_META_GITREV "zfs-2.1.11-0-ge25f9131d"
+#define	ZFS_META_GITREV "zfs-2.1.12-0-g86783d7d9"