3 files changed, 2 insertions, 48 deletions

diff --git a/usr/src/lib/libzfs/common/libzfs_pool.c b/usr/src/lib/libzfs/common/libzfs_pool.c
index 60c83be1a9..d2b4b54294 100644
--- a/usr/src/lib/libzfs/common/libzfs_pool.c
+++ b/usr/src/lib/libzfs/common/libzfs_pool.c
@@ -1503,13 +1503,6 @@ zpool_add(zpool_handle_t *zhp, nvlist_t *nvroot)
 			(void) zfs_error(hdl, EZFS_BADVERSION, msg);
 			break;
 
-		case EDOM:
-			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
-			    "root pool can not have multiple vdevs"
-			    " or separate logs"));
-			(void) zfs_error(hdl, EZFS_POOL_NOTSUP, msg);
-			break;
-
 		default:
 			(void) zpool_standard_error(hdl, errno, msg);
 		}
diff --git a/usr/src/uts/common/fs/zfs/vdev.c b/usr/src/uts/common/fs/zfs/vdev.c
index 9773ec7960..487379aba4 100644
--- a/usr/src/uts/common/fs/zfs/vdev.c
+++ b/usr/src/uts/common/fs/zfs/vdev.c
@@ -4438,7 +4438,6 @@ vdev_children_are_offline(vdev_t *vd)
 /*
  * Check the vdev configuration to ensure that it's capable of supporting
  * a root pool. We do not support partial configuration.
- * In addition, only a single top-level vdev is allowed.
  */
 boolean_t
 vdev_is_bootable(vdev_t *vd)
@@ -4446,23 +4445,7 @@ vdev_is_bootable(vdev_t *vd)
 	if (!vd->vdev_ops->vdev_op_leaf) {
 		char *vdev_type = vd->vdev_ops->vdev_op_type;
 
-		if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 &&
-		    vd->vdev_children > 1) {
-			int non_indirect = 0;
-
-			for (int c = 0; c < vd->vdev_children; c++) {
-				vdev_type =
-				    vd->vdev_child[c]->vdev_ops->vdev_op_type;
-				if (strcmp(vdev_type, VDEV_TYPE_INDIRECT) != 0)
-					non_indirect++;
-			}
-			/*
-			 * non_indirect > 1 means we have more than one
-			 * top-level vdev, so we stop here.
-			 */
-			if (non_indirect > 1)
-				return (B_FALSE);
-		} else if (strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) {
+		if (strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) {
 			return (B_FALSE);
 		}
 	}
diff --git a/usr/src/uts/common/fs/zfs/zfs_ioctl.c b/usr/src/uts/common/fs/zfs/zfs_ioctl.c
index d10db9778b..68d9f3a011 100644
--- a/usr/src/uts/common/fs/zfs/zfs_ioctl.c
+++ b/usr/src/uts/common/fs/zfs/zfs_ioctl.c
@@ -1972,8 +1972,7 @@ zfs_ioc_vdev_add(zfs_cmd_t *zc)
 {
 	spa_t *spa;
 	int error;
-	nvlist_t *config, **l2cache, **spares;
-	uint_t nl2cache = 0, nspares = 0;
+	nvlist_t *config;
 
 	error = spa_open(zc->zc_name, &spa, FTAG);
 	if (error != 0)
@@ -1981,27 +1980,6 @@ zfs_ioc_vdev_add(zfs_cmd_t *zc)
 
 	error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
 	    zc->zc_iflags, &config);
-	(void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
-	    &l2cache, &nl2cache);
-
-	(void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
-	    &spares, &nspares);
-
-	/*
-	 * A root pool with concatenated devices is not supported.
-	 * Thus, can not add a device to a root pool.
-	 *
-	 * Intent log device can not be added to a rootpool because
-	 * during mountroot, zil is replayed, a seperated log device
-	 * can not be accessed during the mountroot time.
-	 *
-	 * l2cache and spare devices are ok to be added to a rootpool.
-	 */
-	if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
-		nvlist_free(config);
-		spa_close(spa, FTAG);
-		return (SET_ERROR(EDOM));
-	}
 
 	if (error == 0) {
 		error = spa_vdev_add(spa, config);