Added no_scrub_restart flag to zpool reopen

Added -n flag to zpool reopen that allows a running scrub
operation to continue if there is a device with Dirty Time Log.

By default if a component device has a DTL and zpool reopen
is executed all running scan operations will be restarted.

Added functional tests for `zpool reopen`

Tests covers following scenarios:
* `zpool reopen` without arguments,
* `zpool reopen` with pool name as argument,
* `zpool reopen` while scrubbing,
* `zpool reopen -n` while scrubbing,
* `zpool reopen -n` while resilvering,
* `zpool reopen` with bad arguments.

Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Tom Caputi <[email protected]>
Signed-off-by: Arkadiusz Bubała <[email protected]>
Closes #6076 
Closes #6746 

28 files changed, 1195 insertions, 382 deletions

diff --git a/cmd/zed/agents/zfs_mod.c b/cmd/zed/agents/zfs_mod.c
index a906decab..5fa74d0ce 100644
--- a/cmd/zed/agents/zfs_mod.c
+++ b/cmd/zed/agents/zfs_mod.c
@@ -23,6 +23,7 @@
  * Copyright (c) 2012 by Delphix. All rights reserved.
  * Copyright 2014 Nexenta Systems, Inc. All rights reserved.
  * Copyright (c) 2016, 2017, Intel Corporation.
+ * Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
  */
 
 /*
@@ -722,6 +723,8 @@ zfsdle_vdev_online(zpool_handle_t *zhp, void *data)
 		(void) strlcpy(fullpath, path, sizeof (fullpath));
 		if (wholedisk) {
 			char *spath = zfs_strip_partition(fullpath);
+			boolean_t scrub_restart = B_TRUE;
+
 			if (!spath) {
 				zed_log_msg(LOG_INFO, "%s: Can't alloc",
 				    __func__);
@@ -736,7 +739,7 @@ zfsdle_vdev_online(zpool_handle_t *zhp, void *data)
 			 * device so that the kernel can update the size
 			 * of the expanded device.
 			 */
-			(void) zpool_reopen(zhp);
+			(void) zpool_reopen_one(zhp, &scrub_restart);
 		}
 
 		if (zpool_get_prop_int(zhp, ZPOOL_PROP_AUTOEXPAND, NULL)) {
diff --git a/cmd/zpool/zpool_main.c b/cmd/zpool/zpool_main.c
index db2486aee..d80cbc6c6 100644
--- a/cmd/zpool/zpool_main.c
+++ b/cmd/zpool/zpool_main.c
@@ -28,6 +28,7 @@
  * Copyright (c) 2013 by Prasad Joshi (sTec). All rights reserved.
  * Copyright 2016 Igor Kozhukhov <[email protected]>.
  * Copyright (c) 2017 Datto Inc.
+ * Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
  */
 
 #include <assert.h>
@@ -342,7 +343,7 @@ get_usage(zpool_help_t idx)
 	case HELP_REMOVE:
 		return (gettext("\tremove <pool> <device> ...\n"));
 	case HELP_REOPEN:
-		return (gettext("\treopen <pool>\n"));
+		return (gettext("\treopen [-n] <pool>\n"));
 	case HELP_SCRUB:
 		return (gettext("\tscrub [-s | -p] <pool> ...\n"));
 	case HELP_STATUS:
@@ -5855,12 +5856,14 @@ zpool_do_reopen(int argc, char **argv)
 {
 	int c;
 	int ret = 0;
-	zpool_handle_t *zhp;
-	char *pool;
+	boolean_t scrub_restart = B_TRUE;
 
 	/* check options */
-	while ((c = getopt(argc, argv, "")) != -1) {
+	while ((c = getopt(argc, argv, "n")) != -1) {
 		switch (c) {
+		case 'n':
+			scrub_restart = B_FALSE;
+			break;
 		case '?':
 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
 			    optopt);
@@ -5868,25 +5871,13 @@ zpool_do_reopen(int argc, char **argv)
 		}
 	}
 
-	argc--;
-	argv++;
-
-	if (argc < 1) {
-		(void) fprintf(stderr, gettext("missing pool name\n"));
-		usage(B_FALSE);
-	}
-
-	if (argc > 1) {
-		(void) fprintf(stderr, gettext("too many arguments\n"));
-		usage(B_FALSE);
-	}
+	argc -= optind;
+	argv += optind;
 
-	pool = argv[0];
-	if ((zhp = zpool_open_canfail(g_zfs, pool)) == NULL)
-		return (1);
+	/* if argc == 0 we will execute zpool_reopen_one on all pools */
+	ret = for_each_pool(argc, argv, B_TRUE, NULL, zpool_reopen_one,
+	    &scrub_restart);
 
-	ret = zpool_reopen(zhp);
-	zpool_close(zhp);
 	return (ret);
 }
 
diff --git a/configure.ac b/configure.ac
index 6dff03092..655641afd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -224,6 +224,7 @@ AC_CONFIG_FILES([
 	tests/zfs-tests/tests/functional/cli_root/zpool_offline/Makefile
 	tests/zfs-tests/tests/functional/cli_root/zpool_online/Makefile
 	tests/zfs-tests/tests/functional/cli_root/zpool_remove/Makefile
+	tests/zfs-tests/tests/functional/cli_root/zpool_reopen/Makefile
 	tests/zfs-tests/tests/functional/cli_root/zpool_replace/Makefile
 	tests/zfs-tests/tests/functional/cli_root/zpool_scrub/Makefile
 	tests/zfs-tests/tests/functional/cli_root/zpool_set/Makefile
diff --git a/include/libzfs.h b/include/libzfs.h
index 7ef250f02..1244bf0e4 100644
--- a/include/libzfs.h
+++ b/include/libzfs.h
@@ -27,6 +27,7 @@
  * Copyright (c) 2016, Intel Corporation.
  * Copyright 2016 Nexenta Systems, Inc.
  * Copyright (c) 2017 Datto Inc.
+ * Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
  */
 
 #ifndef	_LIBZFS_H
@@ -266,7 +267,7 @@ typedef struct splitflags {
 extern int zpool_scan(zpool_handle_t *, pool_scan_func_t, pool_scrub_cmd_t);
 extern int zpool_clear(zpool_handle_t *, const char *, nvlist_t *);
 extern int zpool_reguid(zpool_handle_t *);
-extern int zpool_reopen(zpool_handle_t *);
+extern int zpool_reopen_one(zpool_handle_t *, void *);
 
 extern int zpool_sync_one(zpool_handle_t *, void *);
 
diff --git a/include/libzfs_core.h b/include/libzfs_core.h
index 46e9641d3..9f914e54f 100644
--- a/include/libzfs_core.h
+++ b/include/libzfs_core.h
@@ -23,6 +23,7 @@
  * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
  * Copyright (c) 2017 Datto Inc.
  * Copyright 2017 RackTop Systems.
+ * Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
  */
 
 #ifndef	_LIBZFS_CORE_H
@@ -101,6 +102,7 @@ int lzc_rollback(const char *, char *, int);
 int lzc_rollback_to(const char *, const char *);
 
 int lzc_sync(const char *, nvlist_t *, nvlist_t **);
+int lzc_reopen(const char *, boolean_t);
 
 #ifdef	__cplusplus
 }
diff --git a/lib/libzfs/libzfs_pool.c b/lib/libzfs/libzfs_pool.c
index bfb26d674..aa77b547a 100644
--- a/lib/libzfs/libzfs_pool.c
+++ b/lib/libzfs/libzfs_pool.c
@@ -25,6 +25,7 @@
  * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
  * Copyright 2016 Igor Kozhukhov <[email protected]>
  * Copyright (c) 2017 Datto Inc.
+ * Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
  */
 
 #include <ctype.h>
@@ -3370,20 +3371,20 @@ zpool_reguid(zpool_handle_t *zhp)
  * Reopen the pool.
  */
 int
-zpool_reopen(zpool_handle_t *zhp)
+zpool_reopen_one(zpool_handle_t *zhp, void *data)
 {
-	zfs_cmd_t zc = {"\0"};
-	char msg[1024];
-	libzfs_handle_t *hdl = zhp->zpool_hdl;
+	libzfs_handle_t *hdl = zpool_get_handle(zhp);
+	const char *pool_name = zpool_get_name(zhp);
+	boolean_t *scrub_restart = data;
+	int error;
 
-	(void) snprintf(msg, sizeof (msg),
-	    dgettext(TEXT_DOMAIN, "cannot reopen '%s'"),
-	    zhp->zpool_name);
+	error = lzc_reopen(pool_name, *scrub_restart);
+	if (error) {
+		return (zpool_standard_error_fmt(hdl, error,
+		    dgettext(TEXT_DOMAIN, "cannot reopen '%s'"), pool_name));
+	}
 
-	(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
-	if (zfs_ioctl(hdl, ZFS_IOC_POOL_REOPEN, &zc) == 0)
-		return (0);
-	return (zpool_standard_error(hdl, errno, msg));
+	return (0);
 }
 
 /* call into libzfs_core to execute the sync IOCTL per pool */
diff --git a/lib/libzfs_core/libzfs_core.c b/lib/libzfs_core/libzfs_core.c
index cc663f9dd..675f4a3de 100644
--- a/lib/libzfs_core/libzfs_core.c
+++ b/lib/libzfs_core/libzfs_core.c
@@ -24,6 +24,7 @@
  * Copyright (c) 2013 Steven Hartland. All rights reserved.
  * Copyright (c) 2017 Datto Inc.
  * Copyright 2017 RackTop Systems.
+ * Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
  */
 
 /*
@@ -1111,3 +1112,16 @@ lzc_change_key(const char *fsname, uint64_t crypt_cmd, nvlist_t *props,
 	nvlist_free(ioc_args);
 	return (error);
 }
+
+int
+lzc_reopen(const char *pool_name, boolean_t scrub_restart)
+{
+	nvlist_t *args = fnvlist_alloc();
+	int error;
+
+	fnvlist_add_boolean_value(args, "scrub_restart", scrub_restart);
+
+	error = lzc_ioctl(ZFS_IOC_POOL_REOPEN, pool_name, args, NULL);
+	nvlist_free(args);
+	return (error);
+}
diff --git a/man/man8/zpool.8 b/man/man8/zpool.8
index 54ba68698..5c45b049b 100644
--- a/man/man8/zpool.8
+++ b/man/man8/zpool.8
@@ -25,6 +25,7 @@
 .\" Copyright (c) 2017 Datto Inc.
 .\" Copyright (c) 2017 George Melikov. All Rights Reserved.
 .\" Copyright 2017 Nexenta Systems, Inc.
+.\" Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
 .\"
 .Dd August 23, 2017
 .Dt ZPOOL 8 SMM
@@ -140,6 +141,7 @@
 .Ar pool
 .Nm
 .Cm reopen
+.Op Fl n
 .Ar pool
 .Nm
 .Cm remove
@@ -1739,9 +1741,14 @@ performing this action.
 .It Xo
 .Nm
 .Cm reopen
+.Op Fl n
 .Ar pool
 .Xc
 Reopen all the vdevs associated with the pool.
+.Bl -tag -width Ds
+.It Fl n
+Do not restart an in-progress scrub operation. This is not recommended and can
+result in partially resilvered devices unless a second scrub is performed.
 .It Xo
 .Nm
 .Cm remove
diff --git a/module/zfs/zfs_ioctl.c b/module/zfs/zfs_ioctl.c
index f6291ce59..5f333a42e 100644
--- a/module/zfs/zfs_ioctl.c
+++ b/module/zfs/zfs_ioctl.c
@@ -36,6 +36,7 @@
  * Copyright (c) 2017, loli10K <[email protected]>. All rights reserved.
  * Copyright (c) 2017 Datto Inc. All rights reserved.
  * Copyright 2017 RackTop Systems.
+ * Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
  */
 
 /*
@@ -5032,25 +5033,46 @@ zfs_ioc_clear(zfs_cmd_t *zc)
 	return (error);
 }
 
+/*
+ * Reopen all the vdevs associated with the pool.
+ *
+ * innvl: {
+ *  "scrub_restart" -> when true and scrub is running, allow to restart
+ *              scrub as the side effect of the reopen (boolean).
+ * }
+ *
+ * outnvl is unused
+ */
+/* ARGSUSED */
 static int
-zfs_ioc_pool_reopen(zfs_cmd_t *zc)
+zfs_ioc_pool_reopen(const char *pool, nvlist_t *innvl, nvlist_t *outnvl)
 {
 	spa_t *spa;
 	int error;
+	boolean_t scrub_restart = B_TRUE;
 
-	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (innvl) {
+		if (nvlist_lookup_boolean_value(innvl, "scrub_restart",
+		    &scrub_restart) != 0) {
+			return (SET_ERROR(EINVAL));
+		}
+	}
+
+	error = spa_open(pool, &spa, FTAG);
 	if (error != 0)
 		return (error);
 
 	spa_vdev_state_enter(spa, SCL_NONE);
 
 	/*
-	 * If a resilver is already in progress then set the
-	 * spa_scrub_reopen flag to B_TRUE so that we don't restart
-	 * the scan as a side effect of the reopen. Otherwise, let
-	 * vdev_open() decided if a resilver is required.
+	 * If the scrub_restart flag is B_FALSE and a scrub is already
+	 * in progress then set spa_scrub_reopen flag to B_TRUE so that
+	 * we don't restart the scrub as a side effect of the reopen.
+	 * Otherwise, let vdev_open() decided if a resilver is required.
 	 */
-	spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
+
+	spa->spa_scrub_reopen = (!scrub_restart &&
+	    dsl_scan_scrubbing(spa->spa_dsl_pool));
 	vdev_reopen(spa->spa_root_vdev);
 	spa->spa_scrub_reopen = B_FALSE;
 
@@ -5058,6 +5080,7 @@ zfs_ioc_pool_reopen(zfs_cmd_t *zc)
 	spa_close(spa, FTAG);
 	return (0);
 }
+
 /*
  * inputs:
  * zc_name	name of filesystem
@@ -6316,6 +6339,9 @@ zfs_ioctl_init(void)
 	zfs_ioctl_register("sync", ZFS_IOC_POOL_SYNC,
 	    zfs_ioc_pool_sync, zfs_secpolicy_none, POOL_NAME,
 	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
+	zfs_ioctl_register("reopen", ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
+	    zfs_secpolicy_config, POOL_NAME, POOL_CHECK_SUSPENDED, B_TRUE,
+	    B_TRUE);
 
 	/* IOCTLS that use the legacy function signature */
 
@@ -6389,8 +6415,6 @@ zfs_ioctl_init(void)
 
 	zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
 	    zfs_secpolicy_config, B_TRUE, POOL_CHECK_READONLY);
-	zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
-	    zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
 
 	zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
 	    zfs_ioc_space_written);
diff --git a/tests/runfiles/linux.run b/tests/runfiles/linux.run
index 6fe6b6588..f0c785f59 100644
--- a/tests/runfiles/linux.run
+++ b/tests/runfiles/linux.run
@@ -294,6 +294,11 @@ tests = ['zpool_online_001_pos', 'zpool_online_002_neg']
 tests = ['zpool_remove_001_neg', 'zpool_remove_002_pos',
     'zpool_remove_003_pos']
 
+[tests/functional/cli_root/zpool_reopen]
+tests = ['zpool_reopen_001_pos', 'zpool_reopen_002_pos',
+    'zpool_reopen_003_pos', 'zpool_reopen_004_pos', 'zpool_reopen_005_pos',
+    'zpool_reopen_006_neg']
+
 [tests/functional/cli_root/zpool_replace]
 tests = ['zpool_replace_001_neg', 'replace-o_ashift', 'replace_prop_ashift']
 
diff --git a/tests/zfs-tests/include/Makefile.am b/tests/zfs-tests/include/Makefile.am
index 24633ccc3..e5daa7f5f 100644
--- a/tests/zfs-tests/include/Makefile.am
+++ b/tests/zfs-tests/include/Makefile.am
@@ -1,5 +1,6 @@
 pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/include
 dist_pkgdata_SCRIPTS = \
+	blkdev.shlib \
 	commands.cfg \
 	default.cfg \
 	libtest.shlib \
diff --git a/tests/zfs-tests/include/blkdev.shlib b/tests/zfs-tests/include/blkdev.shlib
new file mode 100644
index 000000000..876c84356
--- /dev/null
+++ b/tests/zfs-tests/include/blkdev.shlib
@@ -0,0 +1,395 @@
+#
+# 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 2009 Sun Microsystems, Inc.  All rights reserved.
+# Use is subject to license terms.
+# Copyright (c) 2012, 2016 by Delphix. All rights reserved.
+# Copyright 2016 Nexenta Systems, Inc.
+# Copyright (c) 2016, 2017 by Intel Corporation. All rights reserved.
+# Copyright (c) 2017 Lawrence Livermore National Security, LLC.
+# Copyright (c) 2017 Datto Inc.
+# Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
+#
+
+#
+# Returns SCSI host number for the given disk
+#
+function get_scsi_host #disk
+{
+	typeset disk=$1
+	ls /sys/block/${disk}/device/scsi_device | cut -d : -f 1
+}
+
+#
+# Cause a scan of all scsi host adapters by default
+#
+# $1 optional host number
+#
+function scan_scsi_hosts
+{
+	typeset hostnum=${1}
+
+	if is_linux; then
+		if [[ -z $hostnum ]]; then
+			for host in /sys/class/scsi_host/host*; do
+				log_must eval "echo '- - -' > $host/scan"
+			done
+		else
+			log_must eval \
+			    "echo /sys/class/scsi_host/host$hostnum/scan" \
+			    > /dev/null
+			log_must eval \
+			    "echo '- - -' > /sys/class/scsi_host/host$hostnum/scan"
+		fi
+	fi
+}
+
+#
+# Wait for newly created block devices to have their minors created.
+#
+function block_device_wait
+{
+	if is_linux; then
+		udevadm trigger
+		udevadm settle
+	fi
+}
+
+#
+# Check if the given device is physical device
+#
+function is_physical_device #device
+{
+	typeset device=${1#$DEV_DSKDIR}
+	device=${device#$DEV_RDSKDIR}
+
+	if is_linux; then
+		[[ -b "$DEV_DSKDIR/$device" ]] && \
+		[[ -f /sys/module/loop/parameters/max_part ]]
+		return $?
+	else
+		echo $device | egrep "^c[0-F]+([td][0-F]+)+$" > /dev/null 2>&1
+		return $?
+	fi
+}
+
+#
+# Check if the given device is a real device (ie SCSI device)
+#
+function is_real_device #disk
+{
+	typeset disk=$1
+	[[ -z $disk ]] && log_fail "No argument for disk given."
+
+	if is_linux; then
+		lsblk $DEV_RDSKDIR/$disk -o TYPE 2>/dev/null | \
+		    egrep disk >/dev/null
+		return $?
+	fi
+}
+
+#
+# Check if the given device is a loop device
+#
+function is_loop_device #disk
+{
+	typeset disk=$1
+	[[ -z $disk ]] && log_fail "No argument for disk given."
+
+	if is_linux; then
+		lsblk $DEV_RDSKDIR/$disk -o TYPE 2>/dev/null | \
+		    egrep loop >/dev/null
+		return $?
+	fi
+}
+
+#
+# Check if the given device is a multipath device and if there is a sybolic
+# link to a device mapper and to a disk
+# Currently no support for dm devices alone without multipath
+#
+function is_mpath_device #disk
+{
+	typeset disk=$1
+	[[ -z $disk ]] && log_fail "No argument for disk given."
+
+	if is_linux; then
+		lsblk $DEV_MPATHDIR/$disk -o TYPE 2>/dev/null | \
+		   egrep mpath >/dev/null
+		if (($? == 0)); then
+			readlink $DEV_MPATHDIR/$disk > /dev/null 2>&1
+			return $?
+		else
+			return $?
+		fi
+	fi
+}
+
+# Set the slice prefix for disk partitioning depending
+# on whether the device is a real, multipath, or loop device.
+# Currently all disks have to be of the same type, so only
+# checks first disk to determine slice prefix.
+#
+function set_slice_prefix
+{
+	typeset disk
+	typeset -i i=0
+
+	if is_linux; then
+		while (( i < $DISK_ARRAY_NUM )); do
+			disk="$(echo $DISKS | nawk '{print $(i + 1)}')"
+			if ( is_mpath_device $disk ) && [[ -z $(echo $disk | awk 'substr($1,18,1)\
+			     ~ /^[[:digit:]]+$/') ]] || ( is_real_device $disk ); then
+				export SLICE_PREFIX=""
+				return 0
+			elif ( is_mpath_device $disk || is_loop_device \
+			    $disk ); then
+				export SLICE_PREFIX="p"
+				return 0
+			else
+				log_fail "$disk not supported for partitioning."
+			fi
+			(( i = i + 1))
+		done
+	fi
+}
+
+#
+# Set the directory path of the listed devices in $DISK_ARRAY_NUM
+# Currently all disks have to be of the same type, so only
+# checks first disk to determine device directory
+# default = /dev (linux)
+# real disk = /dev (linux)
+# multipath device = /dev/mapper (linux)
+#
+function set_device_dir
+{
+	typeset disk
+	typeset -i i=0
+
+	if is_linux; then
+		while (( i < $DISK_ARRAY_NUM )); do
+			disk="$(echo $DISKS | nawk '{print $(i + 1)}')"
+			if is_mpath_device $disk; then
+				export DEV_DSKDIR=$DEV_MPATHDIR
+				return 0
+			else
+				export DEV_DSKDIR=$DEV_RDSKDIR
+				return 0
+			fi
+			(( i = i + 1))
+		done
+	else
+		export DEV_DSKDIR=$DEV_RDSKDIR
+	fi
+}
+
+#
+# Get the directory path of given device
+#
+function get_device_dir #device
+{
+	typeset device=$1
+
+	if ! $(is_physical_device $device) ; then
+		if [[ $device != "/" ]]; then
+			device=${device%/*}
+		fi
+		if [[ -b "$DEV_DSKDIR/$device" ]]; then
+			device="$DEV_DSKDIR"
+		fi
+		echo $device
+	else
+		echo "$DEV_DSKDIR"
+	fi
+}
+
+#
+# Get persistent name for given disk
+#
+function get_persistent_disk_name #device
+{
+	typeset device=$1
+	typeset dev_id
+
+	if is_linux; then
+		if is_real_device $device; then
+			dev_id="$(udevadm info -q all -n $DEV_DSKDIR/$device \
+			    | egrep disk/by-id | nawk '{print $2; exit}' \
+			    | nawk -F / '{print $3}')"
+			echo $dev_id
+		elif is_mpath_device $device; then
+			dev_id="$(udevadm info -q all -n $DEV_DSKDIR/$device \
+			    | egrep disk/by-id/dm-uuid \
+			    | nawk '{print $2; exit}' \
+			    | nawk -F / '{print $3}')"
+			echo $dev_id
+		else
+			echo $device
+		fi
+	else
+		echo $device
+	fi
+}
+
+#
+# Online or offline a disk on the system
+#
+# First checks state of disk. Test will fail if disk is not properly onlined
+# or offlined. Online is a full rescan of SCSI disks by echoing to every
+# host entry.
+#
+function on_off_disk # disk state{online,offline} host
+{
+	typeset disk=$1
+	typeset state=$2
+	typeset host=$3
+
+	[[ -z $disk ]] || [[ -z $state ]] &&  \
+	    log_fail "Arguments invalid or missing"
+
+	if is_linux; then
+		if [[ $state == "offline" ]] && ( is_mpath_device $disk ); then
+			dm_name="$(readlink $DEV_DSKDIR/$disk \
+			    | nawk -F / '{print $2}')"
+			slave="$(ls /sys/block/${dm_name}/slaves \
+			    | nawk '{print $1}')"
+			while [[ -n $slave ]]; do
+				#check if disk is online
+				lsscsi | egrep $slave > /dev/null
+				if (($? == 0)); then
+					slave_dir="/sys/block/${dm_name}"
+					slave_dir+="/slaves/${slave}/device"
+					ss="${slave_dir}/state"
+					sd="${slave_dir}/delete"
+					log_must eval "echo 'offline' > ${ss}"
+					log_must eval "echo '1' > ${sd}"
+					lsscsi | egrep $slave > /dev/null
+						if (($? == 0)); then
+							log_fail "Offlining" \
+							    "$disk failed"
+						fi
+				fi
+				slave="$(ls /sys/block/$dm_name/slaves \
+				    2>/dev/null | nawk '{print $1}')"
+			done
+		elif [[ $state == "offline" ]] && ( is_real_device $disk ); then
+			#check if disk is online
+			lsscsi | egrep $disk > /dev/null
+			if (($? == 0)); then
+				dev_state="/sys/block/$disk/device/state"
+				dev_delete="/sys/block/$disk/device/delete"
+				log_must eval "echo 'offline' > ${dev_state}"
+				log_must eval "echo '1' > ${dev_delete}"
+				lsscsi | egrep $disk > /dev/null
+					if (($? == 0)); then
+						log_fail "Offlining $disk" \
+						    "failed"
+					fi
+			else
+				log_note "$disk is already offline"
+			fi
+		elif [[ $state == "online" ]]; then
+			#force a full rescan
+			scan_scsi_hosts $host
+			block_device_wait
+			if is_mpath_device $disk; then
+				dm_name="$(readlink $DEV_DSKDIR/$disk \
+				    | nawk -F / '{print $2}')"
+				slave="$(ls /sys/block/$dm_name/slaves \
+				    | nawk '{print $1}')"
+				lsscsi | egrep $slave > /dev/null
+				if (($? != 0)); then
+					log_fail "Onlining $disk failed"
+				fi
+			elif is_real_device $disk; then
+				typeset -i retries=0
+				while ! lsscsi | egrep -q $disk; do
+					if (( $retries > 2 )); then
+						log_fail "Onlining $disk failed"
+						break
+					fi
+					(( ++retries ))
+					sleep 1
+				done
+			else
+				log_fail "$disk is not a real dev"
+			fi
+		else
+			log_fail "$disk failed to $state"
+		fi
+	fi
+}
+
+#
+# Simulate disk removal
+#
+function remove_disk #disk
+{
+	typeset disk=$1
+	on_off_disk $disk "offline"
+	block_device_wait
+}
+
+#
+# Simulate disk insertion for the given SCSI host
+#
+function insert_disk #disk scsi_host
+{
+	typeset disk=$1
+	typeset scsi_host=$2
+	on_off_disk $disk "online" $scsi_host
+	block_device_wait
+}
+
+#
+# Load scsi_debug module with specified parameters
+#
+function load_scsi_debug # dev_size_mb add_host num_tgts max_luns
+{
+	typeset devsize=$1
+	typeset hosts=$2
+	typeset tgts=$3
+	typeset luns=$4
+
+	[[ -z $devsize ]] || [[ -z $hosts ]] || [[ -z $tgts ]] || \
+	    [[ -z $luns ]] && log_fail "Arguments invalid or missing"
+
+	if is_linux; then
+		modprobe -n scsi_debug
+		if (($? != 0)); then
+			log_unsupported "Platform does not have scsi_debug"
+			    "module"
+		fi
+		lsmod | egrep scsi_debug > /dev/null
+		if (($? == 0)); then
+			log_fail "scsi_debug module already installed"
+		else
+			log_must modprobe scsi_debug dev_size_mb=$devsize \
+			    add_host=$hosts num_tgts=$tgts max_luns=$luns
+			block_device_wait
+			lsscsi | egrep scsi_debug > /dev/null
+			if (($? == 1)); then
+				log_fail "scsi_debug module install failed"
+			fi
+		fi
+	fi
+}
+
+#
+# Get scsi_debug device name.
+# Returns basename of scsi_debug device (for example "sdb").
+#
+function get_debug_device
+{
+	lsscsi | nawk '/scsi_debug/ {print $6; exit}' | cut -d / -f3
+}
diff --git a/tests/zfs-tests/include/libtest.shlib b/tests/zfs-tests/include/libtest.shlib
index 0e7f20f0e..6b1658c1b 100644
--- a/tests/zfs-tests/include/libtest.shlib
+++ b/tests/zfs-tests/include/libtest.shlib
@@ -27,10 +27,12 @@
 # Copyright 2016 Nexenta Systems, Inc.
 # Copyright (c) 2017 Lawrence Livermore National Security, LLC.
 # Copyright (c) 2017 Datto Inc.
+# Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
 #
 
 . ${STF_TOOLS}/include/logapi.shlib
 . ${STF_SUITE}/include/math.shlib
+. ${STF_SUITE}/include/blkdev.shlib
 
 #
 # Apply constrained path when available.  This is required since the
@@ -1752,124 +1754,6 @@ function check_state # pool disk state{online,offline,degraded}
 }
 
 #
-# Cause a scan of all scsi host adapters by default
-#
-# $1 optional host number
-#
-function scan_scsi_hosts
-{
-	typeset hostnum=${1}
-
-	if is_linux; then
-		if [[ -z $hostnum ]]; then
-			for host in /sys/class/scsi_host/host*; do
-				log_must eval "echo '- - -' > $host/scan"
-			done
-		else
-			log_must eval \
-			    "echo /sys/class/scsi_host/host$hostnum/scan" \
-			    > /dev/null
-			log_must eval \
-			    "echo '- - -' > /sys/class/scsi_host/host$hostnum/scan"
-		fi
-	fi
-}
-#
-# Wait for newly created block devices to have their minors created.
-#
-function block_device_wait
-{
-	if is_linux; then
-		udevadm trigger
-		udevadm settle
-	fi
-}
-
-#
-# Online or offline a disk on the system
-#
-# First checks state of disk. Test will fail if disk is not properly onlined
-# or offlined. Online is a full rescan of SCSI disks by echoing to every
-# host entry.
-#
-function on_off_disk # disk state{online,offline} host
-{
-	typeset disk=$1
-	typeset state=$2
-	typeset host=$3
-
-	[[ -z $disk ]] || [[ -z $state ]] &&  \
-	    log_fail "Arguments invalid or missing"
-
-	if is_linux; then
-		if [[ $state == "offline" ]] && ( is_mpath_device $disk ); then
-			dm_name="$(readlink $DEV_DSKDIR/$disk \
-			    | nawk -F / '{print $2}')"
-			slave="$(ls /sys/block/${dm_name}/slaves \
-			    | nawk '{print $1}')"
-			while [[ -n $slave ]]; do
-				#check if disk is online
-				lsscsi | egrep $slave > /dev/null
-				if (($? == 0)); then
-					slave_dir="/sys/block/${dm_name}"
-					slave_dir+="/slaves/${slave}/device"
-					ss="${slave_dir}/state"
-					sd="${slave_dir}/delete"
-					log_must eval "echo 'offline' > ${ss}"
-					log_must eval "echo '1' > ${sd}"
-					lsscsi | egrep $slave > /dev/null
-						if (($? == 0)); then
-							log_fail "Offlining" \
-							    "$disk failed"
-						fi
-				fi
-				slave="$(ls /sys/block/$dm_name/slaves \
-				    2>/dev/null | nawk '{print $1}')"
-			done
-		elif [[ $state == "offline" ]] && ( is_real_device $disk ); then
-			#check if disk is online
-			lsscsi | egrep $disk > /dev/null
-			if (($? == 0)); then
-				dev_state="/sys/block/$disk/device/state"
-				dev_delete="/sys/block/$disk/device/delete"
-				log_must eval "echo 'offline' > ${dev_state}"
-				log_must eval "echo '1' > ${dev_delete}"
-				lsscsi | egrep $disk > /dev/null
-					if (($? == 0)); then
-						log_fail "Offlining $disk" \
-						    "failed"
-					fi
-			else
-				log_note "$disk is already offline"
-			fi
-		elif [[ $state == "online" ]]; then
-			#force a full rescan
-			scan_scsi_hosts $host
-			block_device_wait
-			if is_mpath_device $disk; then
-				dm_name="$(readlink $DEV_DSKDIR/$disk \
-				    | nawk -F / '{print $2}')"
-				slave="$(ls /sys/block/$dm_name/slaves \
-				    | nawk '{print $1}')"
-				lsscsi | egrep $slave > /dev/null
-				if (($? != 0)); then
-					log_fail "Onlining $disk failed"
-				fi
-			elif is_real_device $disk; then
-				lsscsi | egrep $disk > /dev/null
-				if (($? != 0)); then
-					log_fail "Onlining $disk failed"
-				fi
-			else
-				log_fail "$disk is not a real dev"
-			fi
-		else
-			log_fail "$disk failed to $state"
-		fi
-	fi
-}
-
-#
 # Get the mountpoint of snapshot
 # For the snapshot use <mp_filesystem>/.zfs/snapshot/<snap>
 # as its mountpoint
@@ -2898,217 +2782,6 @@ function get_rootpool
 }
 
 #
-# Check if the given device is physical device
-#
-function is_physical_device #device
-{
-	typeset device=${1#$DEV_DSKDIR}
-	device=${device#$DEV_RDSKDIR}
-
-	if is_linux; then
-		[[ -b "$DEV_DSKDIR/$device" ]] && \
-		[[ -f /sys/module/loop/parameters/max_part ]]
-		return $?
-	else
-		echo $device | egrep "^c[0-F]+([td][0-F]+)+$" > /dev/null 2>&1
-		return $?
-	fi
-}
-
-#
-# Check if the given device is a real device (ie SCSI device)
-#
-function is_real_device #disk
-{
-	typeset disk=$1
-	[[ -z $disk ]] && log_fail "No argument for disk given."
-
-       if is_linux; then
-		lsblk $DEV_RDSKDIR/$disk -o TYPE 2>/dev/null | \
-		    egrep disk >/dev/null
-		return $?
-       fi
-}
-
-#
-# Check if the given device is a loop device
-#
-function is_loop_device #disk
-{
-	typeset disk=$1
-	[[ -z $disk ]] && log_fail "No argument for disk given."
-
-       if is_linux; then
-		lsblk $DEV_RDSKDIR/$disk -o TYPE 2>/dev/null | \
-		    egrep loop >/dev/null
-		return $?
-       fi
-}
-
-#
-# Check if the given device is a multipath device and if there is a sybolic
-# link to a device mapper and to a disk
-# Currently no support for dm devices alone without multipath
-#
-function is_mpath_device #disk
-{
-	typeset disk=$1
-	[[ -z $disk ]] && log_fail "No argument for disk given."
-
-	if is_linux; then
-		lsblk $DEV_MPATHDIR/$disk -o TYPE 2>/dev/null | \
-		   egrep mpath >/dev/null
-		if (($? == 0)); then
-			readlink $DEV_MPATHDIR/$disk > /dev/null 2>&1
-			return $?
-		else
-			return $?
-		fi
-	fi
-}
-
-# Set the slice prefix for disk partitioning depending
-# on whether the device is a real, multipath, or loop device.
-# Currently all disks have to be of the same type, so only
-# checks first disk to determine slice prefix.
-#
-function set_slice_prefix
-{
-	typeset disk
-	typeset -i i=0
-
-	if is_linux; then
-		while (( i < $DISK_ARRAY_NUM )); do
-			disk="$(echo $DISKS | nawk '{print $(i + 1)}')"
-			if ( is_mpath_device $disk ) && [[ -z $(echo $disk | awk 'substr($1,18,1)\
-			     ~ /^[[:digit:]]+$/') ]] || ( is_real_device $disk ); then
-				export SLICE_PREFIX=""
-				return 0
-			elif ( is_mpath_device $disk || is_loop_device \
-			    $disk ); then
-				export SLICE_PREFIX="p"
-				return 0
-			else
-				log_fail "$disk not supported for partitioning."
-			fi
-			(( i = i + 1))
-		done
-	fi
-}
-
-#
-# Set the directory path of the listed devices in $DISK_ARRAY_NUM
-# Currently all disks have to be of the same type, so only
-# checks first disk to determine device directory
-# default = /dev (linux)
-# real disk = /dev (linux)
-# multipath device = /dev/mapper (linux)
-#
-function set_device_dir
-{
-	typeset disk
-	typeset -i i=0
-
-	if is_linux; then
-		while (( i < $DISK_ARRAY_NUM )); do
-			disk="$(echo $DISKS | nawk '{print $(i + 1)}')"
-			if is_mpath_device $disk; then
-				export DEV_DSKDIR=$DEV_MPATHDIR
-				return 0
-			else
-				export DEV_DSKDIR=$DEV_RDSKDIR
-				return 0
-			fi
-			(( i = i + 1))
-		done
-	else
-		export DEV_DSKDIR=$DEV_RDSKDIR
-	fi
-}
-
-#
-# Get the directory path of given device
-#
-function get_device_dir #device
-{
-	typeset device=$1
-
-	if ! $(is_physical_device $device) ; then
-		if [[ $device != "/" ]]; then
-			device=${device%/*}
-		fi
-		if [[ -b "$DEV_DSKDIR/$device" ]]; then
-			device="$DEV_DSKDIR"
-		fi
-		echo $device
-	else
-		echo "$DEV_DSKDIR"
-	fi
-}
-
-#
-# Get persistent name for given disk
-#
-function get_persistent_disk_name #device
-{
-	typeset device=$1
-	typeset dev_id
-
-	if is_linux; then
-		if is_real_device $device; then
-			dev_id="$(udevadm info -q all -n $DEV_DSKDIR/$device \
-			    | egrep disk/by-id | nawk '{print $2; exit}' \
-			    | nawk -F / '{print $3}')"
-			echo $dev_id
-		elif is_mpath_device $device; then
-			dev_id="$(udevadm info -q all -n $DEV_DSKDIR/$device \
-			    | egrep disk/by-id/dm-uuid \
-			    | nawk '{print $2; exit}' \
-			    | nawk -F / '{print $3}')"
-			echo $dev_id
-		else
-			echo $device
-		fi
-	else
-		echo $device
-	fi
-}
-
-#
-# Load scsi_debug module with specified parameters
-#
-function load_scsi_debug # dev_size_mb add_host num_tgts max_luns
-{
-	typeset devsize=$1
-	typeset hosts=$2
-	typeset tgts=$3
-	typeset luns=$4
-
-	[[ -z $devsize ]] || [[ -z $hosts ]] || [[ -z $tgts ]] || \
-	    [[ -z $luns ]] && log_fail "Arguments invalid or missing"
-
-	if is_linux; then
-		modprobe -n scsi_debug
-		if (($? != 0)); then
-			log_unsupported "Platform does not have scsi_debug"
-			    "module"
-		fi
-		lsmod | egrep scsi_debug > /dev/null
-		if (($? == 0)); then
-			log_fail "scsi_debug module already installed"
-		else
-			log_must modprobe scsi_debug dev_size_mb=$devsize \
-			    add_host=$hosts num_tgts=$tgts max_luns=$luns
-			block_device_wait
-			lsscsi | egrep scsi_debug > /dev/null
-			if (($? == 1)); then
-				log_fail "scsi_debug module install failed"
-			fi
-		fi
-	fi
-}
-
-#
 # Get the package name
 #
 function get_package_name
diff --git a/tests/zfs-tests/tests/functional/cli_root/Makefile.am b/tests/zfs-tests/tests/functional/cli_root/Makefile.am
index acea36bb7..6c70fa13e 100644
--- a/tests/zfs-tests/tests/functional/cli_root/Makefile.am
+++ b/tests/zfs-tests/tests/functional/cli_root/Makefile.am
@@ -46,6 +46,7 @@ SUBDIRS = \
 	zpool_offline \
 	zpool_online \
 	zpool_remove \
+	zpool_reopen \
 	zpool_replace \
 	zpool_scrub \
 	zpool_set \
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/Makefile.am b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/Makefile.am
new file mode 100644
index 000000000..26de288a8
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/Makefile.am
@@ -0,0 +1,12 @@
+pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/functional/cli_root/zpool_reopen
+dist_pkgdata_SCRIPTS = \
+	setup.ksh \
+	cleanup.ksh \
+	zpool_reopen.cfg \
+	zpool_reopen.shlib \
+	zpool_reopen_001_pos.ksh \
+	zpool_reopen_002_pos.ksh \
+	zpool_reopen_003_pos.ksh \
+	zpool_reopen_004_pos.ksh \
+	zpool_reopen_005_pos.ksh \
+	zpool_reopen_006_neg.ksh
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/cleanup.ksh b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/cleanup.ksh
new file mode 100755
index 000000000..4477e5402
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/cleanup.ksh
@@ -0,0 +1,33 @@
+#!/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) 2016, 2017 by Intel Corporation. All rights reserved.
+# Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
+#
+
+. $STF_SUITE/tests/functional/cli_root/zpool_reopen/zpool_reopen.shlib
+
+verify_runnable "global"
+
+cleanup_devices $DISKS
+
+# Unplug the disk and remove scsi_debug module
+if is_linux; then
+	for SDDEVICE in $(get_debug_device); do
+		unplug $SDDEVICE
+	done
+	modprobe -r scsi_debug
+fi
+
+log_pass
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/setup.ksh b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/setup.ksh
new file mode 100755
index 000000000..4dbf8965d
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/setup.ksh
@@ -0,0 +1,30 @@
+#!/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) 2016, 2017 by Intel Corporation. All rights reserved.
+# Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
+#
+
+. $STF_SUITE/tests/functional/cli_root/zpool_reopen/zpool_reopen.cfg
+
+verify_runnable "global"
+
+# Create scsi_debug devices for the reopen tests
+if is_linux; then
+	load_scsi_debug $SDSIZE $SDHOSTS $SDTGTS $SDLUNS
+else
+	log_unsupported "scsi debug module unsupported"
+fi
+
+log_pass
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen.cfg b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen.cfg
new file mode 100755
index 000000000..9227cbb18
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen.cfg
@@ -0,0 +1,47 @@
+#!/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) 2016, 2017 by Intel Corporation. All rights reserved.
+# Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+
+verify_runnable "global"
+
+export DISK_ARRAY_NUM=$(echo ${DISKS} | nawk '{print NF}')
+export DISKSARRAY=$DISKS
+export SMALL_FILE_SIZE=10
+export LARGE_FILE_SIZE=80
+export MAXTIMEOUT=40
+
+export SDSIZE=256
+export SDHOSTS=1
+export SDTGTS=1
+export SDLUNS=1
+
+export DISK1=$(echo $DISKS | nawk '{print $1}')
+export DISK2=$(echo $DISKS | nawk '{print $2}')
+export DISK3=$(echo $DISKS | nawk '{print $3}')
+
+if is_linux; then
+	set_slice_prefix
+	set_device_dir
+	devs_id[0]=$(get_persistent_disk_name $DISK1)
+	devs_id[1]=$(get_persistent_disk_name $DISK2)
+	devs_id[2]=$(get_persistent_disk_name $DISK3)
+	export devs_id
+else
+	DEV_DSKDIR="/dev"
+fi
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen.shlib b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen.shlib
new file mode 100755
index 000000000..82860deb3
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen.shlib
@@ -0,0 +1,117 @@
+#
+# 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 Open-E, Inc. All Rights Reserved.
+#
+
+. $STF_SUITE/tests/functional/cli_root/zpool_reopen/zpool_reopen.cfg
+
+#
+# Clear labels on the given disks
+#
+function clear_labels #disks
+{
+	for disk in $@; do
+		if ( is_loop_device $disk ) || ( is_mpath_device $disk ); then
+			zpool labelclear -f /dev/$disk
+		else
+			zpool labelclear -f /dev/${disk}1
+		fi
+	done
+}
+
+#
+# Set the REMOVED_DISK and REMOVED_DISK_ID constants for device
+# used for re-plugging. When the disk is loop device use the
+# scsi_debug emulated drive. Otherwise use the real drive.
+#
+function set_removed_disk
+{
+	if is_loop_device $DISK1; then
+		export REMOVED_DISK=$(get_debug_device)
+		export REMOVED_DISK_ID=$(get_persistent_disk_name $REMOVED_DISK)
+	elif ( is_real_device $DISK1 ) || ( is_mpath_device $DISK1 ); then
+		export REMOVED_DISK="$DISK1"
+		export REMOVED_DISK_ID=${devs_id[0]}
+	else
+		log_fail "No drives that supports removal"
+	fi
+}
+
+#
+# Generate random file of the given size in MiB
+#
+function generate_random_file #path size_mb
+{
+	typeset path=$1
+	typeset -i size_mb=$2
+	file_write -o create -f $path -b 1048576 -s0 -c $size_mb -d R
+}
+
+#
+# Wait until specific event or timeout occur.
+#
+# The passed function is executed with pool name as argument
+# with an interval of 1 second until it succeeds or until the
+# timeout occurs.
+# It returns 1 on timeout or 0 otherwise.
+#
+function wait_for_action #pool timeout function
+{
+	typeset pool=$1
+	typeset -i timeout=$2
+	typeset func=$3
+
+	while [ $timeout -gt 0 ]; do
+		(( --timeout ))
+		if ( $func $pool ); then
+			return 0
+		fi
+		sleep 1
+	done
+
+	return 1
+}
+
+#
+# Helpers for wait_for_action function:
+# wait_for_resilver_start - wait until resilver is started
+# wait_for_resilver_end - wait until resilver is finished
+# wait_for_scrub_end - wait until scrub is finished
+#
+function wait_for_resilver_start #pool timeout
+{
+	wait_for_action $1 $2 is_pool_resilvering
+	return $?
+}
+
+function wait_for_resilver_end #pool timeout
+{
+	wait_for_action $1 $2 is_pool_resilvered
+	return $?
+}
+
+function wait_for_scrub_end #pool timeout
+{
+	wait_for_action $1 $2 is_pool_scrubbed
+	return $?
+}
+
+#
+# Check if scan action has been restarted on the given pool
+#
+
+function is_scan_restarted #pool
+{
+	typeset pool=$1
+	zpool history -i $pool | grep -q "scan aborted, restarting"
+	return $?
+}
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_001_pos.ksh b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_001_pos.ksh
new file mode 100755
index 000000000..68ebf669c
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_001_pos.ksh
@@ -0,0 +1,70 @@
+#!/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) 2017 Open-E, Inc. All Rights Reserved.
+#
+
+. $STF_SUITE/tests/functional/cli_root/zpool_reopen/zpool_reopen.shlib
+
+#
+# DESCRIPTION:
+# Test if zpool reopen with no arguments works correctly.
+#
+# STRATEGY:
+# 1. Create a pool.
+# 2. Remove a disk.
+# 3. Reopen a pool and verify if removed disk is marked as unavailable.
+# 4. "Plug back" disk.
+# 5. Reopen a pool and verify if removed disk is marked online again.
+# 6. Check if reopen caused resilver start.
+#
+
+verify_runnable "global"
+
+function cleanup
+{
+	# bring back removed disk online for further tests
+	insert_disk $REMOVED_DISK $scsi_host
+	poolexists $TESTPOOL && destroy_pool $TESTPOOL
+	clear_labels $REMOVED_DISK $DISK2
+}
+
+log_assert "Testing zpool reopen with no arguments"
+log_onexit cleanup
+
+set_removed_disk
+scsi_host=$(get_scsi_host $REMOVED_DISK)
+
+# 1. Create a pool.
+default_mirror_setup_noexit $REMOVED_DISK_ID $DISK2
+# 2. Remove a disk.
+remove_disk $REMOVED_DISK
+# 3. Reopen a pool and verify if removed disk is marked as unavailable.
+log_must zpool reopen
+log_must check_state $TESTPOOL "$REMOVED_DISK_ID" "unavail"
+# Write some data to the pool
+log_must generate_random_file /$TESTPOOL/data $SMALL_FILE_SIZE
+# 4. "Plug back" disk.
+insert_disk $REMOVED_DISK $scsi_host
+# 5. Reopen a pool and verify if removed disk is marked online again.
+log_must zpool reopen
+log_must check_state $TESTPOOL "$REMOVED_DISK_ID" "online"
+# 6. Check if reopen caused resilver start.
+log_must wait_for_resilver_end $TESTPOOL $MAXTIMEOUT
+
+# clean up
+log_must zpool destroy $TESTPOOL
+clear_labels $REMOVED_DISK $DISK2
+
+log_pass "Zpool reopen with no arguments test passed"
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_002_pos.ksh b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_002_pos.ksh
new file mode 100755
index 000000000..444c8a685
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_002_pos.ksh
@@ -0,0 +1,70 @@
+#!/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) 2017 Open-E, Inc. All Rights Reserved.
+#
+
+. $STF_SUITE/tests/functional/cli_root/zpool_reopen/zpool_reopen.shlib
+
+#
+# DESCRIPTION:
+# Test if zpool reopen with pool name as argument works correctly.
+#
+# STRATEGY:
+# 1. Create a pool.
+# 2. Remove a disk.
+# 3. Reopen a pool and verify if removed disk is marked as unavailable.
+# 4. "Plug back" disk.
+# 5. Reopen a pool and verify if removed disk is marked online again.
+# 6. Check if reopen caused resilver start.
+#
+
+verify_runnable "global"
+
+function cleanup
+{
+	# bring back removed disk online for further tests
+	insert_disk $REMOVED_DISK $scsi_host
+	poolexists $TESTPOOL && destroy_pool $TESTPOOL
+	clear_labels $REMOVED_DISK $DISK2
+}
+
+log_assert "Testing zpool reopen with no arguments"
+log_onexit cleanup
+
+set_removed_disk
+scsi_host=$(get_scsi_host $REMOVED_DISK)
+
+# 1. Create a pool.
+default_mirror_setup_noexit $REMOVED_DISK_ID $DISK2
+# 2. Remove a disk.
+remove_disk $REMOVED_DISK
+# 3. Reopen a pool and verify if removed disk is marked as unavailable.
+log_must zpool reopen $TESTPOOL
+log_must check_state $TESTPOOL "$REMOVED_DISK_ID" "unavail"
+# Write some data to the pool
+log_must generate_random_file /$TESTPOOL/data $SMALL_FILE_SIZE
+# 4. "Plug back" disk.
+insert_disk $REMOVED_DISK $scsi_host
+# 5. Reopen a pool and verify if removed disk is marked online again.
+log_must zpool reopen $TESTPOOL
+log_must check_state $TESTPOOL "$REMOVED_DISK_ID" "online"
+# 6. Check if reopen caused resilver start.
+log_must wait_for_resilver_end $TESTPOOL $MAXTIMEOUT
+
+# clean up
+log_must zpool destroy $TESTPOOL
+clear_labels $REMOVED_DISK $DISK2
+
+log_pass "Zpool reopen with no arguments test passed"
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_003_pos.ksh b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_003_pos.ksh
new file mode 100755
index 000000000..42bc457ea
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_003_pos.ksh
@@ -0,0 +1,101 @@
+#!/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) 2017 Open-E, Inc. All Rights Reserved.
+#
+
+. $STF_SUITE/tests/functional/cli_root/zpool_reopen/zpool_reopen.shlib
+
+#
+# DESCRIPTION:
+# Test zpool reopen while scrub is running.
+# Checks if re-plugged device is fully resilvered.
+#
+# STRATEGY:
+# 1. Create a pool
+# 2. Remove a disk.
+# 3. Write a test file to the pool and calculate its checksum.
+# 4. Execute scrub.
+# 5. "Plug back" disk.
+# 6. Reopen a pool.
+# 7. Check if scrub scan is replaced by resilver.
+# 8. Put another device offline and check if the test file checksum is correct.
+#
+# NOTES:
+#	A 25ms delay is added to make sure that the scrub is running while
+#	the reopen kicks the resilver.
+#
+
+verify_runnable "global"
+
+function cleanup
+{
+	log_must zinject -c all
+	rm -f $TESTFILE_MD5 2>/dev/null
+	# bring back removed disk online for further tests
+	insert_disk $REMOVED_DISK $scsi_host
+	poolexists $TESTPOOL && destroy_pool $TESTPOOL
+}
+
+log_assert "Testing zpool reopen with pool name as argument"
+log_onexit cleanup
+
+set_removed_disk
+scsi_host=$(get_scsi_host $REMOVED_DISK)
+
+# 1. Create a pool
+default_mirror_setup_noexit $REMOVED_DISK_ID $DISK2
+# 2. Remove a disk.
+remove_disk $REMOVED_DISK
+
+log_must zpool reopen $TESTPOOL
+log_must check_state $TESTPOOL "$REMOVED_DISK_ID" "unavail"
+
+# 3. Write a test file to the pool and calculate its checksum.
+TESTFILE=/$TESTPOOL/data
+TESTFILE_MD5=$(mktemp --tmpdir=/var/tmp)
+log_must generate_random_file /$TESTPOOL/data $LARGE_FILE_SIZE
+log_must md5sum $TESTFILE > $TESTFILE_MD5
+
+# 4. Execute scrub.
+# add delay to I/O requests for remaining disk in pool
+log_must zinject -d $DISK2 -D25:1 $TESTPOOL
+log_must zpool scrub $TESTPOOL
+
+# 5. "Plug back" disk.
+insert_disk $REMOVED_DISK $scsi_host
+# 6. Reopen a pool.
+log_must zpool reopen $TESTPOOL
+log_must check_state $TESTPOOL "$REMOVED_DISK_ID" "online"
+# 7. Check if scrub scan is replaced by resilver.
+# the scrub operation has to be running while reopen is executed
+log_must is_pool_scrubbing $TESTPOOL true
+# the scrub will be replaced by resilver, wait until it ends
+log_must wait_for_resilver_end $TESTPOOL $MAXTIMEOUT
+# check if the scrub scan has been interrupted by resilver
+log_must is_scan_restarted $TESTPOOL
+# remove delay from disk
+log_must zinject -c all
+
+# 8. Put another device offline and check if the test file checksum is correct.
+log_must zpool offline $TESTPOOL $DISK2
+log_must md5sum -c $TESTFILE_MD5
+log_must zpool online $TESTPOOL $DISK2
+sleep 1
+
+# clean up
+rm -f $TESTFILE_MD5 2>/dev/null
+log_must zpool destroy $TESTPOOL
+
+log_pass "Zpool reopen test successful"
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_004_pos.ksh b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_004_pos.ksh
new file mode 100755
index 000000000..d61283d14
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_004_pos.ksh
@@ -0,0 +1,88 @@
+#!/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) 2017 Open-E, Inc. All Rights Reserved.
+#
+
+. $STF_SUITE/tests/functional/cli_root/zpool_reopen/zpool_reopen.shlib
+
+#
+# DESCRIPTION:
+# Test zpool reopen -n while scrub is running.
+# Checks if re-plugged device is NOT resilvered.
+#
+# STRATEGY:
+# 1. Create a pool
+# 2. Remove a disk.
+# 3. Write test file to pool.
+# 4. Execute scrub.
+# 5. "Plug back" disk.
+# 6. Reopen a pool with an -n flag.
+# 7. Check if scrub scan is NOT replaced by resilver.
+# 8. Check if trying to put device to offline fails because of no valid
+#    replicas.
+#
+# NOTES:
+#	A 25ms delay is added to make sure that the scrub is running while
+#	the reopen is invoked.
+#
+
+verify_runnable "global"
+
+function cleanup
+{
+	log_must zinject -c all
+	# bring back removed disk online for further tests
+	insert_disk $REMOVED_DISK $scsi_host
+	poolexists $TESTPOOL && destroy_pool $TESTPOOL
+}
+
+log_assert "Testing zpool reopen with pool name as argument"
+log_onexit cleanup
+
+set_removed_disk
+scsi_host=$(get_scsi_host $REMOVED_DISK)
+
+# 1. Create a pool
+default_mirror_setup_noexit $REMOVED_DISK_ID $DISK2
+# 2. Remove a disk.
+remove_disk $REMOVED_DISK
+log_must zpool reopen -n $TESTPOOL
+log_must check_state $TESTPOOL "$REMOVED_DISK_ID" "unavail"
+# 3. Write test file to pool.
+log_must generate_random_file /$TESTPOOL/data $LARGE_FILE_SIZE
+# 4. Execute scrub.
+# add delay to I/O requests for remaining disk in pool
+log_must zinject -d $DISK2 -D25:1 $TESTPOOL
+log_must zpool scrub $TESTPOOL
+# 5. "Plug back" disk.
+insert_disk $REMOVED_DISK $scsi_host
+# 6. Reopen a pool with an -n flag.
+log_must zpool reopen -n $TESTPOOL
+log_must check_state $TESTPOOL "$REMOVED_DISK_ID" "online"
+# 7. Check if scrub scan is NOT replaced by resilver.
+log_must wait_for_scrub_end $TESTPOOL $MAXTIMEOUT
+log_mustnot is_scan_restarted $TESTPOOL
+
+# remove delay from disk
+log_must zinject -c all
+
+# 8. Check if trying to put device to offline fails because of no valid
+#    replicas.
+log_mustnot zpool offline $TESTPOOL $DISK2
+
+# clean up
+log_must zpool destroy $TESTPOOL
+
+log_pass "Zpool reopen test successful"
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_005_pos.ksh b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_005_pos.ksh
new file mode 100755
index 000000000..95029a8b6
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_005_pos.ksh
@@ -0,0 +1,86 @@
+#!/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) 2017 Open-E, Inc. All Rights Reserved.
+#
+
+. $STF_SUITE/tests/functional/cli_root/zpool_reopen/zpool_reopen.shlib
+
+#
+# DESCRIPTION:
+# Test zpool reopen -n while resilver is running.
+# Checks if the resilver is restarted.
+#
+# STRATEGY:
+# 1. Create a pool
+# 2. Remove a disk.
+# 3. Write test file to pool.
+# 4. "Plug back" disk.
+# 5. Reopen a pool and wait until resilvering is started.
+# 6. Reopen a pool again with -n flag.
+# 7. Wait until resilvering is finished and check if it was restarted.
+#
+# NOTES:
+#	A 25ms delay is added to make sure that the resilver is running while
+#	the reopen is invoked.
+#
+
+verify_runnable "global"
+
+function cleanup
+{
+	log_must zinject -c all
+	insert_disk $REMOVED_DISK $scsi_host
+	poolexists $TESTPOOL && destroy_pool $TESTPOOL
+}
+
+log_assert "Testing zpool reopen with pool name as argument"
+log_onexit cleanup
+
+set_removed_disk
+scsi_host=$(get_scsi_host $REMOVED_DISK)
+
+# 1. Create a pool
+default_mirror_setup_noexit $REMOVED_DISK_ID $DISK2
+# 2. Remove a disk.
+remove_disk $REMOVED_DISK
+
+log_must zpool reopen $TESTPOOL
+log_must check_state $TESTPOOL "$REMOVED_DISK_ID" "unavail"
+# 3. Write test file to pool.
+log_must generate_random_file /$TESTPOOL/data $LARGE_FILE_SIZE
+# 4. "Plug back" disk.
+insert_disk $REMOVED_DISK $scsi_host
+
+# 5. Reopen a pool and wait until resilvering is started.
+log_must zpool reopen $TESTPOOL
+log_must check_state $TESTPOOL "$REMOVED_DISK_ID" "online"
+# add delay to I/O requests for the reopened disk
+log_must zinject -d $REMOVED_DISK_ID -D25:1 $TESTPOOL
+# wait until resilver starts
+log_must wait_for_resilver_start $TESTPOOL $MAXTIMEOUT
+
+# 6. Reopen a pool again with -n flag.
+zpool reopen -n $TESTPOOL
+
+# 7. Wait until resilvering is finished and check if it was restarted.
+log_must wait_for_resilver_end $TESTPOOL $MAXTIMEOUT
+# remove delay from disk
+log_must zinject -c all
+log_must is_scan_restarted $TESTPOOL
+
+# clean up
+log_must zpool destroy $TESTPOOL
+
+log_pass "Zpool reopen test successful"
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_006_neg.ksh b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_006_neg.ksh
new file mode 100755
index 000000000..6533bde68
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_reopen/zpool_reopen_006_neg.ksh
@@ -0,0 +1,43 @@
+#!/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) 2017 Open-E, Inc. All Rights Reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+
+#
+# DESCRIPTION:
+# Wrong arguments passed to zpool reopen should cause an error.
+#
+# STRATEGY:
+# 1. Create an array with bad 'zpool reopen' arguments.
+# 2. For each argument execute the 'zpool reopen' command and verify
+#    if it returns an error.
+#
+
+verify_runnable "global"
+
+# 1. Create an array with bad 'zpool reopen' arguments.
+typeset -a args=("!" "1" "-s" "--n" "-1" "-" "-c" "-f" "-d 2" "-abc" "-na")
+
+log_assert "Test 'zpool reopen' with invalid arguments."
+
+# 2. For each argument execute the 'zpool reopen' command and verify
+#    if it returns an error.
+for arg in ${args[@]}; do
+	log_mustnot zpool reopen $arg
+done
+
+log_pass "Passing invalid arguments to 'zpool reopen' failed as expected."
diff --git a/tests/zfs-tests/tests/functional/fault/auto_online_001_pos.ksh b/tests/zfs-tests/tests/functional/fault/auto_online_001_pos.ksh
index bf09816bc..50f721c27 100755
--- a/tests/zfs-tests/tests/functional/fault/auto_online_001_pos.ksh
+++ b/tests/zfs-tests/tests/functional/fault/auto_online_001_pos.ksh
@@ -55,7 +55,7 @@ fi
 function cleanup
 {
 	#online last disk before fail
-	on_off_disk $offline_disk "online" $host
+	insert_disk $offline_disk $host
 	poolexists $TESTPOOL && destroy_pool $TESTPOOL
 }
 
@@ -98,11 +98,10 @@ for offline_disk in $autoonline_disks
 do
 	log_must zpool export -F $TESTPOOL
 
-	host=$(ls /sys/block/$offline_disk/device/scsi_device \
-	    | nawk -F : '{ print $1}')
+	host=$(get_scsi_host $offline_disk)
 
 	# Offline disk
-	on_off_disk $offline_disk "offline"
+	remove_disk $offline_disk
 
 	# Reimport pool with drive missing
 	log_must zpool import $TESTPOOL
@@ -115,7 +114,7 @@ do
 	zpool events -c $TESTPOOL
 
 	# Online disk
-	on_off_disk $offline_disk "online" $host
+	insert_disk $offline_disk $host
 
 	log_note "Delay for ZED auto-online"
 	typeset -i timeout=0
diff --git a/tests/zfs-tests/tests/functional/fault/auto_replace_001_pos.ksh b/tests/zfs-tests/tests/functional/fault/auto_replace_001_pos.ksh
index 24f128c3d..0f71a575e 100755
--- a/tests/zfs-tests/tests/functional/fault/auto_replace_001_pos.ksh
+++ b/tests/zfs-tests/tests/functional/fault/auto_replace_001_pos.ksh
@@ -110,7 +110,7 @@ log_must mkfile $FSIZE /$TESTPOOL/data
 log_must zpool export -F $TESTPOOL
 
 # Offline disk
-on_off_disk $SD "offline"
+remove_disk $SD
 block_device_wait
 log_must modprobe -r scsi_debug
 
diff --git a/tests/zfs-tests/tests/functional/fault/cleanup.ksh b/tests/zfs-tests/tests/functional/fault/cleanup.ksh
index f39f05d6f..82e379b0d 100755
--- a/tests/zfs-tests/tests/functional/fault/cleanup.ksh
+++ b/tests/zfs-tests/tests/functional/fault/cleanup.ksh
@@ -33,14 +33,12 @@ cleanup_devices $DISKS
 zed_stop
 zed_cleanup
 
-SD=$(lsscsi | nawk '/scsi_debug/ {print $6; exit}')
-SDDEVICE=$(echo $SD | nawk -F / '{print $3}')
+SDDEVICE=$(get_debug_device)
 
 # Offline disk and remove scsi_debug module
 if is_linux; then
 	if [ -n "$SDDEVICE" ]; then
-		on_off_disk $SDDEVICE "offline"
-		block_device_wait
+		remove_disk $SDDEVICE
 	fi
 	modprobe -r scsi_debug
 fi