Fix uninitialized variable snapprops_nvlist in zfs_receive_one

The variable snapprops_nvlist was never initialized, so properties
were not applied to the received snapshot.

Additionally, add zfs_receive_013_pos.ksh script to ZFS test suite to exercise
'zfs receive' functionality for user properties.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #4338

lib/libzfs/libzfs_sendrecv.c

@@ -3110,6 +3110,7 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
 	    ENOENT);
 
 	if (stream_avl != NULL) {
+		nvlist_t *lookup = NULL;
 		nvlist_t *fs = fsavl_find(stream_avl, drrb->drr_toguid,
 		    &snapname);
 
@@ -3125,6 +3126,10 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
 			VERIFY(0 == nvlist_add_uint64(props,
 			    zfs_prop_to_name(ZFS_PROP_CANMOUNT), 0));
 		}
+		if (0 == nvlist_lookup_nvlist(fs, "snapprops", &lookup)) {
+			VERIFY(0 == nvlist_lookup_nvlist(lookup,
+			    snapname, &snapprops_nvlist));
+		}
 	}
 
 	cp = NULL;

tests/runfiles/linux.run

@@ -144,7 +144,7 @@ tests = []
 tests = ['zfs_receive_001_pos', 'zfs_receive_002_pos', 'zfs_receive_003_pos',
     'zfs_receive_005_neg', 'zfs_receive_006_pos',
     'zfs_receive_007_neg', 'zfs_receive_008_pos', 'zfs_receive_009_neg',
-    'zfs_receive_010_pos', 'zfs_receive_012_pos']
+    'zfs_receive_010_pos', 'zfs_receive_012_pos', 'zfs_receive_013_pos']
 
 # DISABLED:
 # zfs_rename_002_pos - needs investigation

tests/zfs-tests/tests/functional/cli_root/zfs_receive/Makefile.am

@@ -13,4 +13,5 @@ dist_pkgdata_SCRIPTS = \
 	zfs_receive_009_neg.ksh \
 	zfs_receive_010_pos.ksh \
 	zfs_receive_011_pos.ksh \
-	zfs_receive_012_pos.ksh
+	zfs_receive_012_pos.ksh \
+	zfs_receive_013_pos.ksh

tests/zfs-tests/tests/functional/cli_root/zfs_receive/zfs_receive_013_pos.ksh

@@ -0,0 +1,83 @@
+#!/bin/ksh -p
+#
+# CDDL HEADER START
+#
+# 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.
+#
+# CDDL HEADER END
+#
+
+#
+# Copyright 2016, loli10K. All rights reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/cli_root/zfs_set/zfs_set_common.kshlib
+
+#
+# DESCRIPTION:
+#	Verify ZFS can receive custom properties on both filesystems and
+#	snapshots from full and incremental streams.
+#
+# STRATEGY:
+#	1. Create a filesystem.
+#	2. Snapshot the filesystem.
+#	3. Set custom properties on both the fs and snapshots.
+#	4. Create different send streams with the properties.
+#	5. Receive the send streams and verify the properties.
+#
+
+verify_runnable "both"
+
+typeset streamfile_full=/var/tmp/streamfile_full.$$
+typeset streamfile_incr=/var/tmp/streamfile_incr.$$
+orig=$TESTPOOL/$TESTFS1
+dest=$TESTPOOL/$TESTFS2
+typeset user_prop=$(valid_user_property 8)
+typeset value=$(user_property_value 8)
+
+function cleanup
+{
+	log_must $RM $streamfile_full
+	log_must $RM $streamfile_incr
+	log_must $ZFS destroy -rf $TESTPOOL/$TESTFS1
+	log_must $ZFS destroy -rf $TESTPOOL/$TESTFS2
+}
+
+log_assert "ZFS can receive custom properties."
+log_onexit cleanup
+
+#	1. Create a filesystem.
+log_must $ZFS create $orig
+
+#	2. Snapshot the filesystem.
+log_must $ZFS snapshot $orig@snap1
+log_must $ZFS snapshot $orig@snap2
+log_must $ZFS snapshot $orig@snap3
+
+#	3. Set custom properties on both the fs and snapshots.
+log_must eval "$ZFS set '$user_prop'='$value' $orig"
+log_must eval "$ZFS set '$user_prop:snap1'='$value:snap1' $orig@snap1"
+log_must eval "$ZFS set '$user_prop:snap2'='$value:snap2' $orig@snap2"
+log_must eval "$ZFS set '$user_prop:snap3'='$value:snap3' $orig@snap3"
+
+#	4. Create different send streams with the properties.
+log_must eval "$ZFS send -p $orig@snap1 > $streamfile_full"
+log_must eval "$ZFS send -p -I $orig@snap1 $orig@snap3 > $streamfile_incr"
+
+#	5. Receive the send streams and verify the properties.
+log_must eval "$ZFS recv $dest < $streamfile_full"
+log_must eval "check_user_prop $dest $user_prop '$value'"
+log_must eval "check_user_prop $dest@snap1 '$user_prop:snap1' '$value:snap1'"
+log_must eval "$ZFS recv $dest < $streamfile_incr"
+log_must eval "check_user_prop $dest@snap2 '$user_prop:snap2' '$value:snap2'"
+log_must eval "check_user_prop $dest@snap3 '$user_prop:snap3' '$value:snap3'"
+
+log_pass "ZFS can receive custom properties passed."