Allow add of raidz and mirror with same redundancy

Allow new members to be added to a pool mixing raidz and mirror vdevs
without giving -f, as long as they have matching redundancy.  This case
was missed in #5915, which only handled zpool create.

Add zfstest zpool_add_010_pos.ksh, with test of zpool create
followed by zpool add of mixed raidz and mirror vdevs.

Add some more mixed raidz and mirror cases to zpool_create_006_pos.ksh.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Haakan Johansson <f96hajo@chalmers.se>
Issue #5915 
Closes #6181

cmd/zpool/zpool_vdev.c

@@ -1053,6 +1053,7 @@ check_replication(nvlist_t *config, nvlist_t *newroot)
 	nvlist_t **child;
 	uint_t	children;
 	replication_level_t *current = NULL, *new;
+	replication_level_t *raidz, *mirror;
 	int ret;
 
 	/*
@@ -1100,7 +1101,21 @@ check_replication(nvlist_t *config, nvlist_t *newroot)
 	 */
 	ret = 0;
 	if (current != NULL) {
-		if (strcmp(current->zprl_type, new->zprl_type) != 0) {
+		if (is_raidz_mirror(current, new, &raidz, &mirror) ||
+		    is_raidz_mirror(new, current, &raidz, &mirror)) {
+			if (raidz->zprl_parity != mirror->zprl_children - 1) {
+				vdev_error(gettext(
+				    "mismatched replication level: pool and "
+				    "new vdev with different redundancy, %s "
+				    "and %s vdevs, %llu vs. %llu (%llu-way)\n"),
+				    raidz->zprl_type,
+				    mirror->zprl_type,
+				    raidz->zprl_parity,
+				    mirror->zprl_children - 1,
+				    mirror->zprl_children);
+				ret = -1;
+			}
+		} else if (strcmp(current->zprl_type, new->zprl_type) != 0) {
 			vdev_error(gettext(
 			    "mismatched replication level: pool uses %s "
 			    "and new vdev is %s\n"),

tests/runfiles/linux.run

@@ -193,6 +193,7 @@ tests = ['zpool_001_neg', 'zpool_002_pos', 'zpool_003_pos']
 tests = ['zpool_add_001_pos', 'zpool_add_002_pos', 'zpool_add_003_pos',
     'zpool_add_004_pos', 'zpool_add_005_pos', 'zpool_add_006_pos',
     'zpool_add_007_neg', 'zpool_add_008_neg', 'zpool_add_009_neg',
+    'zpool_add_010_pos',
     'add-o_ashift', 'add_prop_ashift']
 
 [tests/functional/cli_root/zpool_attach]

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

@@ -13,5 +13,6 @@ dist_pkgdata_SCRIPTS = \
 	zpool_add_007_neg.ksh \
 	zpool_add_008_neg.ksh \
 	zpool_add_009_neg.ksh \
+	zpool_add_010_pos.ksh \
 	add-o_ashift.ksh \
 	add_prop_ashift.ksh

tests/zfs-tests/tests/functional/cli_root/zpool_add/zpool_add_010_pos.ksh

@@ -0,0 +1,164 @@
+#!/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 2009 Sun Microsystems, Inc.  All rights reserved.
+# Use is subject to license terms.
+#
+
+#
+# Copyright (c) 2012, 2016 by Delphix. All rights reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/cli_root/zpool_create/zpool_create.shlib
+
+#
+# DESCRIPTION:
+#	Verify zpool add succeed when adding vdevs with matching redundancy.
+#
+# STRATEGY:
+#	1. Create base filesystem to hold virtual disk files.
+#	2. Create several files == $MINVDEVSIZE.
+#	3. Create pool with given redundancy.
+#	3. Verify 'zpool add' succeed with with matching redundancy.
+#
+
+verify_runnable "global"
+
+function cleanup
+{
+	datasetexists $TESTPOOL1 && destroy_pool $TESTPOOL1
+	datasetexists $TESTPOOL && destroy_pool $TESTPOOL
+}
+
+
+log_assert "Verify 'zpool add' succeed with keywords combination."
+log_onexit cleanup
+
+create_pool $TESTPOOL $DISKS
+mntpnt=$(get_prop mountpoint $TESTPOOL)
+
+typeset -i i=0
+while ((i < 10)); do
+	log_must truncate -s $MINVDEVSIZE $mntpnt/vdev$i
+
+	eval vdev$i=$mntpnt/vdev$i
+	((i += 1))
+done
+
+set -A redundancy0_create_args \
+	"$vdev0"
+
+set -A redundancy1_create_args \
+	"mirror $vdev0 $vdev1" \
+	"raidz1 $vdev0 $vdev1"
+
+set -A redundancy2_create_args \
+	"mirror $vdev0 $vdev1 $vdev2" \
+	"raidz2 $vdev0 $vdev1 $vdev2"
+
+set -A redundancy3_create_args \
+	"mirror $vdev0 $vdev1 $vdev2 $vdev3" \
+	"raidz3 $vdev0 $vdev1 $vdev2 $vdev3"
+
+set -A redundancy0_add_args \
+	"$vdev5" \
+	"$vdev5 $vdev6"
+
+set -A redundancy1_add_args \
+	"mirror $vdev5 $vdev6" \
+	"raidz1 $vdev5 $vdev6" \
+	"raidz1 $vdev5 $vdev6 mirror $vdev7 $vdev8" \
+	"mirror $vdev5 $vdev6 raidz1 $vdev7 $vdev8"
+
+set -A redundancy2_add_args \
+	"mirror $vdev5 $vdev6 $vdev7" \
+	"raidz2 $vdev5 $vdev6 $vdev7"
+
+set -A redundancy3_add_args \
+	"mirror $vdev5 $vdev6 $vdev7 $vdev8" \
+	"raidz3 $vdev5 $vdev6 $vdev7 $vdev8"
+
+typeset -i j=0
+
+function zpool_create_add
+{
+	typeset -n create_args=$1
+	typeset -n add_args=$2
+
+	i=0
+	while ((i < ${#create_args[@]})); do
+		j=0
+		while ((j < ${#add_args[@]})); do
+			log_must zpool create $TESTPOOL1 ${create_args[$i]}
+			log_must zpool add $TESTPOOL1 ${add_args[$j]}
+			log_must zpool destroy -f $TESTPOOL1
+
+			((j += 1))
+		done
+		((i += 1))
+	done
+}
+
+function zpool_create_forced_add
+{
+	typeset -n create_args=$1
+	typeset -n add_args=$2
+
+	i=0
+	while ((i < ${#create_args[@]})); do
+		j=0
+		while ((j < ${#add_args[@]})); do
+			log_must zpool create $TESTPOOL1 ${create_args[$i]}
+			log_mustnot zpool add $TESTPOOL1 ${add_args[$j]}
+			log_must zpool add -f $TESTPOOL1 ${add_args[$j]}
+			log_must zpool destroy -f $TESTPOOL1
+
+			((j += 1))
+		done
+		((i += 1))
+	done
+}
+
+zpool_create_add redundancy0_create_args redundancy0_add_args
+zpool_create_add redundancy1_create_args redundancy1_add_args
+zpool_create_add redundancy2_create_args redundancy2_add_args
+zpool_create_add redundancy3_create_args redundancy3_add_args
+
+zpool_create_forced_add redundancy0_create_args redundancy1_add_args
+zpool_create_forced_add redundancy0_create_args redundancy2_add_args
+zpool_create_forced_add redundancy0_create_args redundancy3_add_args
+
+zpool_create_forced_add redundancy1_create_args redundancy0_add_args
+zpool_create_forced_add redundancy1_create_args redundancy2_add_args
+zpool_create_forced_add redundancy1_create_args redundancy3_add_args
+
+zpool_create_forced_add redundancy2_create_args redundancy0_add_args
+zpool_create_forced_add redundancy2_create_args redundancy1_add_args
+zpool_create_forced_add redundancy2_create_args redundancy3_add_args
+
+zpool_create_forced_add redundancy3_create_args redundancy0_add_args
+zpool_create_forced_add redundancy3_create_args redundancy1_add_args
+zpool_create_forced_add redundancy3_create_args redundancy2_add_args
+
+log_pass "'zpool add' succeed with keywords combination."

tests/zfs-tests/tests/functional/cli_root/zpool_create/zpool_create_006_pos.ksh

@@ -59,7 +59,7 @@ mntpnt=$(get_prop mountpoint $TESTPOOL)
 
 typeset -i i=0
 while ((i < 10)); do
-	log_must mkfile $MINVDEVSIZE $mntpnt/vdev$i
+	log_must truncate -s $MINVDEVSIZE $mntpnt/vdev$i
 
 	eval vdev$i=$mntpnt/vdev$i
 	((i += 1))
@@ -73,6 +73,12 @@ set -A valid_args \
 	"mirror $vdev0 $vdev1 mirror $vdev2 $vdev3 mirror $vdev4 $vdev5 \
 		spare $vdev6 $vdev7" \
 	"mirror $vdev0 $vdev1 spare $vdev2 mirror $vdev3 $vdev4" \
+	"mirror $vdev0 $vdev1 raidz $vdev2 $vdev3" \
+	"mirror $vdev0 $vdev1 raidz $vdev2 $vdev3 $vdev4" \
+	"mirror $vdev0 $vdev1 $vdev2 raidz2 $vdev3 $vdev4 $vdev5" \
+	"mirror $vdev0 $vdev1 $vdev2 $vdev3 \
+		raidz3 $vdev4 $vdev5 $vdev6 $vdev7" \
+	"raidz $vdev0 $vdev1 $vdev2 mirror $vdev3 $vdev4" \
 	"raidz $vdev0 $vdev1 $vdev2 raidz1 $vdev3 $vdev4 $vdev5" \
 	"raidz $vdev0 $vdev1 raidz1 $vdev2 $vdev3 raidz $vdev4 $vdev5" \
 	"raidz $vdev0 $vdev1 $vdev2 raidz1 $vdev3 $vdev4 $vdev5 \
@@ -80,6 +86,7 @@ set -A valid_args \
 	"raidz $vdev0 $vdev1 raidz1 $vdev2 $vdev3 raidz $vdev4 $vdev5 \
 		spare $vdev6 $vdev7" \
 	"raidz $vdev0 $vdev1 spare $vdev2 raidz $vdev3 $vdev4" \
+	"raidz2 $vdev0 $vdev1 $vdev2 mirror $vdev3 $vdev4 $vdev5" \
 	"raidz2 $vdev0 $vdev1 $vdev2 raidz2 $vdev3 $vdev4 $vdev5" \
 	"raidz2 $vdev0 $vdev1 $vdev2 raidz2 $vdev3 $vdev4 $vdev5 \
 		raidz2 $vdev6 $vdev7 $vdev8" \
@@ -88,6 +95,8 @@ set -A valid_args \
 	"raidz2 $vdev0 $vdev1 $vdev2 raidz2 $vdev3 $vdev4 $vdev5 \
 		raidz2 $vdev6 $vdev7 $vdev8 spare $vdev9" \
 	"raidz2 $vdev0 $vdev1 $vdev2 spare $vdev3 raidz2 $vdev4 $vdev5 $vdev6" \
+	"raidz3 $vdev0 $vdev1 $vdev2 $vdev3 \
+		mirror $vdev4 $vdev5 $vdev6 $vdev7" \
 	"spare $vdev0 $vdev1 $vdev2 mirror $vdev3 $vdev4 raidz $vdev5 $vdev6"
 
 set -A forced_args \
@@ -111,7 +120,6 @@ set -A forced_args \
 i=0
 while ((i < ${#valid_args[@]})); do
 	log_must zpool create $TESTPOOL1 ${valid_args[$i]}
-	sync; sync
 	log_must zpool destroy -f $TESTPOOL1
 
 	((i += 1))
@@ -121,7 +129,6 @@ i=0
 while ((i < ${#forced_args[@]})); do
 	log_mustnot zpool create $TESTPOOL1 ${forced_args[$i]}
 	log_must zpool create -f $TESTPOOL1 ${forced_args[$i]}
-	sync; sync
 	log_must zpool destroy -f $TESTPOOL1
 
 	((i += 1))