diff --git a/module/zfs/dsl_dir.c b/module/zfs/dsl_dir.c index d615832c56..97b38d209b 100644 --- a/module/zfs/dsl_dir.c +++ b/module/zfs/dsl_dir.c @@ -460,12 +460,14 @@ dsl_dir_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) /* * There should be exactly two holds, both from * dsl_dataset_destroy: one on the dd directory, and one on its - * head ds. Otherwise, someone is trying to lookup something - * inside this dir while we want to destroy it. The - * config_rwlock ensures that nobody else opens it after we - * check. + * head ds. If there are more holds, then a concurrent thread is + * performing a lookup inside this dir while we're trying to destroy + * it. To minimize this possibility, we perform this check only + * in syncing context and fail the operation if we encounter + * additional holds. The dp_config_rwlock ensures that nobody else + * opens it after we check. */ - if (dmu_buf_refcount(dd->dd_dbuf) > 2) + if (dmu_tx_is_syncing(tx) && dmu_buf_refcount(dd->dd_dbuf) > 2) return (EBUSY); err = zap_count(mos, dd->dd_phys->dd_child_dir_zapobj, &count); diff --git a/module/zfs/zfs_ioctl.c b/module/zfs/zfs_ioctl.c index aeac01496a..c609203ea4 100644 --- a/module/zfs/zfs_ioctl.c +++ b/module/zfs/zfs_ioctl.c @@ -4094,7 +4094,17 @@ zfs_ioc_pool_reopen(zfs_cmd_t *zc) 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. + */ + spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool); vdev_reopen(spa->spa_root_vdev); + spa->spa_scrub_reopen = B_FALSE; + (void) spa_vdev_state_exit(spa, NULL, 0); spa_close(spa, FTAG); return (0);