Illumos #3699, #3739

3699 zfs hold or release of a non-existent snapshot does not output error
3739 cannot set zfs quota or reservation on pool version < 22
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Eric Shrock <eric.schrock@delphix.com>
Approved by: Dan McDonald <danmcd@nexenta.com>

References:
  https://www.illumos.org/issues/3699
  https://www.illumos.org/issues/3739
  illumos/illumos-gate@013023d4ed

Ported-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1775

lib/libzfs/libzfs_dataset.c

@@ -25,6 +25,7 @@
  * Copyright (c) 2012 DEY Storage Systems, Inc.  All rights reserved.
  * Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
  * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
+ * Copyright (c) 2013 Martin Matuska. All rights reserved.
  */
 
 #include <ctype.h>
@@ -4455,6 +4456,20 @@ zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
 	ha.tag = tag;
 	ha.recursive = recursive;
 	(void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
+
+	if (nvlist_next_nvpair(ha.nvl, NULL) == NULL) {
+		fnvlist_free(ha.nvl);
+		ret = ENOENT;
+		if (!enoent_ok) {
+			(void) snprintf(errbuf, sizeof (errbuf),
+			    dgettext(TEXT_DOMAIN,
+			    "cannot hold snapshot '%s@%s'"),
+			    zhp->zfs_name, snapname);
+			(void) zfs_standard_error(hdl, ret, errbuf);
+		}
+		return (ret);
+	}
+
 	ret = lzc_hold(ha.nvl, cleanup_fd, &errors);
 	fnvlist_free(ha.nvl);
 
@@ -4556,12 +4571,25 @@ zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
 	nvlist_t *errors;
 	nvpair_t *elem;
 	libzfs_handle_t *hdl = zhp->zfs_hdl;
+	char errbuf[1024];
 
 	ha.nvl = fnvlist_alloc();
 	ha.snapname = snapname;
 	ha.tag = tag;
 	ha.recursive = recursive;
 	(void) zfs_release_one(zfs_handle_dup(zhp), &ha);
+
+	if (nvlist_next_nvpair(ha.nvl, NULL) == NULL) {
+		fnvlist_free(ha.nvl);
+		ret = ENOENT;
+		(void) snprintf(errbuf, sizeof (errbuf),
+		    dgettext(TEXT_DOMAIN,
+		    "cannot release hold from snapshot '%s@%s'"),
+		    zhp->zfs_name, snapname);
+		(void) zfs_standard_error(hdl, ret, errbuf);
+		return (ret);
+	}
+
 	ret = lzc_release(ha.nvl, &errors);
 	fnvlist_free(ha.nvl);
 
@@ -4570,8 +4598,6 @@ zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
 
 	if (nvlist_next_nvpair(errors, NULL) == NULL) {
 		/* no hold-specific errors */
-		char errbuf[1024];
-
 		(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
 		    "cannot release"));
 		switch (errno) {
@@ -4588,8 +4614,6 @@ zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
 	for (elem = nvlist_next_nvpair(errors, NULL);
 	    elem != NULL;
 	    elem = nvlist_next_nvpair(errors, elem)) {
-		char errbuf[1024];
-
 		(void) snprintf(errbuf, sizeof (errbuf),
 		    dgettext(TEXT_DOMAIN,
 		    "cannot release hold from snapshot '%s'"),

module/zfs/dsl_dir.c

@@ -21,6 +21,7 @@
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2013 by Delphix. All rights reserved.
+ * Copyright (c) 2013 Martin Matuska. All rights reserved.
  */
 
 #include <sys/dmu.h>
@@ -974,12 +975,18 @@ dsl_dir_set_quota_sync(void *arg, dmu_tx_t *tx)
 
 	VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds));
 
-	dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_QUOTA),
+	if (spa_version(dp->dp_spa) >= SPA_VERSION_RECVD_PROPS) {
-	    ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1,
+		dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_QUOTA),
-	    &ddsqra->ddsqra_value, tx);
+		    ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1,
+		    &ddsqra->ddsqra_value, tx);
 
-	VERIFY0(dsl_prop_get_int_ds(ds,
+		VERIFY0(dsl_prop_get_int_ds(ds,
-	    zfs_prop_to_name(ZFS_PROP_QUOTA), &newval));
+		    zfs_prop_to_name(ZFS_PROP_QUOTA), &newval));
+	} else {
+		newval = ddsqra->ddsqra_value;
+		spa_history_log_internal_ds(ds, "set", tx, "%s=%lld",
+		    zfs_prop_to_name(ZFS_PROP_QUOTA), (longlong_t)newval);
+	}
 
 	dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx);
 	mutex_enter(&ds->ds_dir->dd_lock);
@@ -1089,13 +1096,21 @@ dsl_dir_set_reservation_sync(void *arg, dmu_tx_t *tx)
 
 	VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds));
 
-	dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_RESERVATION),
+	if (spa_version(dp->dp_spa) >= SPA_VERSION_RECVD_PROPS) {
-	    ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1,
+		dsl_prop_set_sync_impl(ds,
-	    &ddsqra->ddsqra_value, tx);
+		    zfs_prop_to_name(ZFS_PROP_RESERVATION),
-
+		    ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1,
-	VERIFY0(dsl_prop_get_int_ds(ds,
+		    &ddsqra->ddsqra_value, tx);
-	    zfs_prop_to_name(ZFS_PROP_RESERVATION), &newval));
  
+		VERIFY0(dsl_prop_get_int_ds(ds,
+		    zfs_prop_to_name(ZFS_PROP_RESERVATION), &newval));
+	} else {
+		newval = ddsqra->ddsqra_value;
+		spa_history_log_internal_ds(ds, "set", tx, "%s=%lld",
+		    zfs_prop_to_name(ZFS_PROP_RESERVATION),
+		    (longlong_t)newval);
+	}
+
 	dsl_dir_set_reservation_sync_impl(ds->ds_dir, newval, tx);
 	dsl_dataset_rele(ds, FTAG);
  }

module/zfs/dsl_prop.c

@@ -21,6 +21,7 @@
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2013 by Delphix. All rights reserved.
+ * Copyright (c) 2013 Martin Matuska. All rights reserved.
  */
 
 #include <sys/zfs_context.h>
@@ -557,10 +558,6 @@ dsl_prop_set_sync_impl(dsl_dataset_t *ds, const char *propname,
 	}
 
 	if (version < SPA_VERSION_RECVD_PROPS) {
-		zfs_prop_t prop = zfs_name_to_prop(propname);
-		if (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_RESERVATION)
-			return;
-
 		if (source & ZPROP_SRC_NONE)
 			source = ZPROP_SRC_NONE;
 		else if (source & ZPROP_SRC_RECEIVED)