diff options
Diffstat (limited to 'uts/common/fs/zfs/spa.c')
| -rw-r--r-- | uts/common/fs/zfs/spa.c | 5882 |
1 files changed, 5882 insertions, 0 deletions
diff --git a/uts/common/fs/zfs/spa.c b/uts/common/fs/zfs/spa.c new file mode 100644 index 000000000000..b6190e4cfafe --- /dev/null +++ b/uts/common/fs/zfs/spa.c @@ -0,0 +1,5882 @@ +/* + * 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. + */ + +/* + * This file contains all the routines used when modifying on-disk SPA state. + * This includes opening, importing, destroying, exporting a pool, and syncing a + * pool. + */ + +#include <sys/zfs_context.h> +#include <sys/fm/fs/zfs.h> +#include <sys/spa_impl.h> +#include <sys/zio.h> +#include <sys/zio_checksum.h> +#include <sys/dmu.h> +#include <sys/dmu_tx.h> +#include <sys/zap.h> +#include <sys/zil.h> +#include <sys/ddt.h> +#include <sys/vdev_impl.h> +#include <sys/metaslab.h> +#include <sys/metaslab_impl.h> +#include <sys/uberblock_impl.h> +#include <sys/txg.h> +#include <sys/avl.h> +#include <sys/dmu_traverse.h> +#include <sys/dmu_objset.h> +#include <sys/unique.h> +#include <sys/dsl_pool.h> +#include <sys/dsl_dataset.h> +#include <sys/dsl_dir.h> +#include <sys/dsl_prop.h> +#include <sys/dsl_synctask.h> +#include <sys/fs/zfs.h> +#include <sys/arc.h> +#include <sys/callb.h> +#include <sys/systeminfo.h> +#include <sys/spa_boot.h> +#include <sys/zfs_ioctl.h> +#include <sys/dsl_scan.h> + +#ifdef _KERNEL +#include <sys/bootprops.h> +#include <sys/callb.h> +#include <sys/cpupart.h> +#include <sys/pool.h> +#include <sys/sysdc.h> +#include <sys/zone.h> +#endif /* _KERNEL */ + +#include "zfs_prop.h" +#include "zfs_comutil.h" + +typedef enum zti_modes { + zti_mode_fixed, /* value is # of threads (min 1) */ + zti_mode_online_percent, /* value is % of online CPUs */ + zti_mode_batch, /* cpu-intensive; value is ignored */ + zti_mode_null, /* don't create a taskq */ + zti_nmodes +} zti_modes_t; + +#define ZTI_FIX(n) { zti_mode_fixed, (n) } +#define ZTI_PCT(n) { zti_mode_online_percent, (n) } +#define ZTI_BATCH { zti_mode_batch, 0 } +#define ZTI_NULL { zti_mode_null, 0 } + +#define ZTI_ONE ZTI_FIX(1) + +typedef struct zio_taskq_info { + enum zti_modes zti_mode; + uint_t zti_value; +} zio_taskq_info_t; + +static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = { + "issue", "issue_high", "intr", "intr_high" +}; + +/* + * Define the taskq threads for the following I/O types: + * NULL, READ, WRITE, FREE, CLAIM, and IOCTL + */ +const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = { + /* ISSUE ISSUE_HIGH INTR INTR_HIGH */ + { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, + { ZTI_FIX(8), ZTI_NULL, ZTI_BATCH, ZTI_NULL }, + { ZTI_BATCH, ZTI_FIX(5), ZTI_FIX(8), ZTI_FIX(5) }, + { ZTI_FIX(100), ZTI_NULL, ZTI_ONE, ZTI_NULL }, + { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, + { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, +}; + +static dsl_syncfunc_t spa_sync_props; +static boolean_t spa_has_active_shared_spare(spa_t *spa); +static int spa_load_impl(spa_t *spa, uint64_t, nvlist_t *config, + spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, + char **ereport); +static void spa_vdev_resilver_done(spa_t *spa); + +uint_t zio_taskq_batch_pct = 100; /* 1 thread per cpu in pset */ +id_t zio_taskq_psrset_bind = PS_NONE; +boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */ +uint_t zio_taskq_basedc = 80; /* base duty cycle */ + +boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */ + +/* + * This (illegal) pool name is used when temporarily importing a spa_t in order + * to get the vdev stats associated with the imported devices. + */ +#define TRYIMPORT_NAME "$import" + +/* + * ========================================================================== + * SPA properties routines + * ========================================================================== + */ + +/* + * Add a (source=src, propname=propval) list to an nvlist. + */ +static void +spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, + uint64_t intval, zprop_source_t src) +{ + const char *propname = zpool_prop_to_name(prop); + nvlist_t *propval; + + VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); + VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0); + + if (strval != NULL) + VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0); + else + VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0); + + VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0); + nvlist_free(propval); +} + +/* + * Get property values from the spa configuration. + */ +static void +spa_prop_get_config(spa_t *spa, nvlist_t **nvp) +{ + uint64_t size; + uint64_t alloc; + uint64_t cap, version; + zprop_source_t src = ZPROP_SRC_NONE; + spa_config_dirent_t *dp; + + ASSERT(MUTEX_HELD(&spa->spa_props_lock)); + + if (spa->spa_root_vdev != NULL) { + alloc = metaslab_class_get_alloc(spa_normal_class(spa)); + size = metaslab_class_get_space(spa_normal_class(spa)); + spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src); + spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src); + spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src); + spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL, + size - alloc, src); + spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL, + (spa_mode(spa) == FREAD), src); + + cap = (size == 0) ? 0 : (alloc * 100 / size); + spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src); + + spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL, + ddt_get_pool_dedup_ratio(spa), src); + + spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL, + spa->spa_root_vdev->vdev_state, src); + + version = spa_version(spa); + if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION)) + src = ZPROP_SRC_DEFAULT; + else + src = ZPROP_SRC_LOCAL; + spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src); + } + + spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src); + + if (spa->spa_root != NULL) + spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root, + 0, ZPROP_SRC_LOCAL); + + if ((dp = list_head(&spa->spa_config_list)) != NULL) { + if (dp->scd_path == NULL) { + spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, + "none", 0, ZPROP_SRC_LOCAL); + } else if (strcmp(dp->scd_path, spa_config_path) != 0) { + spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, + dp->scd_path, 0, ZPROP_SRC_LOCAL); + } + } +} + +/* + * Get zpool property values. + */ +int +spa_prop_get(spa_t *spa, nvlist_t **nvp) +{ + objset_t *mos = spa->spa_meta_objset; + zap_cursor_t zc; + zap_attribute_t za; + int err; + + VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); + + mutex_enter(&spa->spa_props_lock); + + /* + * Get properties from the spa config. + */ + spa_prop_get_config(spa, nvp); + + /* If no pool property object, no more prop to get. */ + if (mos == NULL || spa->spa_pool_props_object == 0) { + mutex_exit(&spa->spa_props_lock); + return (0); + } + + /* + * Get properties from the MOS pool property object. + */ + for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); + (err = zap_cursor_retrieve(&zc, &za)) == 0; + zap_cursor_advance(&zc)) { + uint64_t intval = 0; + char *strval = NULL; + zprop_source_t src = ZPROP_SRC_DEFAULT; + zpool_prop_t prop; + + if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL) + continue; + + switch (za.za_integer_length) { + case 8: + /* integer property */ + if (za.za_first_integer != + zpool_prop_default_numeric(prop)) + src = ZPROP_SRC_LOCAL; + + if (prop == ZPOOL_PROP_BOOTFS) { + dsl_pool_t *dp; + dsl_dataset_t *ds = NULL; + + dp = spa_get_dsl(spa); + rw_enter(&dp->dp_config_rwlock, RW_READER); + if (err = dsl_dataset_hold_obj(dp, + za.za_first_integer, FTAG, &ds)) { + rw_exit(&dp->dp_config_rwlock); + break; + } + + strval = kmem_alloc( + MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, + KM_SLEEP); + dsl_dataset_name(ds, strval); + dsl_dataset_rele(ds, FTAG); + rw_exit(&dp->dp_config_rwlock); + } else { + strval = NULL; + intval = za.za_first_integer; + } + + spa_prop_add_list(*nvp, prop, strval, intval, src); + + if (strval != NULL) + kmem_free(strval, + MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); + + break; + + case 1: + /* string property */ + strval = kmem_alloc(za.za_num_integers, KM_SLEEP); + err = zap_lookup(mos, spa->spa_pool_props_object, + za.za_name, 1, za.za_num_integers, strval); + if (err) { + kmem_free(strval, za.za_num_integers); + break; + } + spa_prop_add_list(*nvp, prop, strval, 0, src); + kmem_free(strval, za.za_num_integers); + break; + + default: + break; + } + } + zap_cursor_fini(&zc); + mutex_exit(&spa->spa_props_lock); +out: + if (err && err != ENOENT) { + nvlist_free(*nvp); + *nvp = NULL; + return (err); + } + + return (0); +} + +/* + * Validate the given pool properties nvlist and modify the list + * for the property values to be set. + */ +static int +spa_prop_validate(spa_t *spa, nvlist_t *props) +{ + nvpair_t *elem; + int error = 0, reset_bootfs = 0; + uint64_t objnum; + + elem = NULL; + while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { + zpool_prop_t prop; + char *propname, *strval; + uint64_t intval; + objset_t *os; + char *slash; + + propname = nvpair_name(elem); + + if ((prop = zpool_name_to_prop(propname)) == ZPROP_INVAL) + return (EINVAL); + + switch (prop) { + case ZPOOL_PROP_VERSION: + error = nvpair_value_uint64(elem, &intval); + if (!error && + (intval < spa_version(spa) || intval > SPA_VERSION)) + error = EINVAL; + break; + + case ZPOOL_PROP_DELEGATION: + case ZPOOL_PROP_AUTOREPLACE: + case ZPOOL_PROP_LISTSNAPS: + case ZPOOL_PROP_AUTOEXPAND: + error = nvpair_value_uint64(elem, &intval); + if (!error && intval > 1) + error = EINVAL; + break; + + case ZPOOL_PROP_BOOTFS: + /* + * If the pool version is less than SPA_VERSION_BOOTFS, + * or the pool is still being created (version == 0), + * the bootfs property cannot be set. + */ + if (spa_version(spa) < SPA_VERSION_BOOTFS) { + error = ENOTSUP; + break; + } + + /* + * Make sure the vdev config is bootable + */ + if (!vdev_is_bootable(spa->spa_root_vdev)) { + error = ENOTSUP; + break; + } + + reset_bootfs = 1; + + error = nvpair_value_string(elem, &strval); + + if (!error) { + uint64_t compress; + + if (strval == NULL || strval[0] == '\0') { + objnum = zpool_prop_default_numeric( + ZPOOL_PROP_BOOTFS); + break; + } + + if (error = dmu_objset_hold(strval, FTAG, &os)) + break; + + /* Must be ZPL and not gzip compressed. */ + + if (dmu_objset_type(os) != DMU_OST_ZFS) { + error = ENOTSUP; + } else if ((error = dsl_prop_get_integer(strval, + zfs_prop_to_name(ZFS_PROP_COMPRESSION), + &compress, NULL)) == 0 && + !BOOTFS_COMPRESS_VALID(compress)) { + error = ENOTSUP; + } else { + objnum = dmu_objset_id(os); + } + dmu_objset_rele(os, FTAG); + } + break; + + case ZPOOL_PROP_FAILUREMODE: + error = nvpair_value_uint64(elem, &intval); + if (!error && (intval < ZIO_FAILURE_MODE_WAIT || + intval > ZIO_FAILURE_MODE_PANIC)) + error = EINVAL; + + /* + * This is a special case which only occurs when + * the pool has completely failed. This allows + * the user to change the in-core failmode property + * without syncing it out to disk (I/Os might + * currently be blocked). We do this by returning + * EIO to the caller (spa_prop_set) to trick it + * into thinking we encountered a property validation + * error. + */ + if (!error && spa_suspended(spa)) { + spa->spa_failmode = intval; + error = EIO; + } + break; + + case ZPOOL_PROP_CACHEFILE: + if ((error = nvpair_value_string(elem, &strval)) != 0) + break; + + if (strval[0] == '\0') + break; + + if (strcmp(strval, "none") == 0) + break; + + if (strval[0] != '/') { + error = EINVAL; + break; + } + + slash = strrchr(strval, '/'); + ASSERT(slash != NULL); + + if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || + strcmp(slash, "/..") == 0) + error = EINVAL; + break; + + case ZPOOL_PROP_DEDUPDITTO: + if (spa_version(spa) < SPA_VERSION_DEDUP) + error = ENOTSUP; + else + error = nvpair_value_uint64(elem, &intval); + if (error == 0 && + intval != 0 && intval < ZIO_DEDUPDITTO_MIN) + error = EINVAL; + break; + } + + if (error) + break; + } + + if (!error && reset_bootfs) { + error = nvlist_remove(props, + zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING); + + if (!error) { + error = nvlist_add_uint64(props, + zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum); + } + } + + return (error); +} + +void +spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync) +{ + char *cachefile; + spa_config_dirent_t *dp; + + if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), + &cachefile) != 0) + return; + + dp = kmem_alloc(sizeof (spa_config_dirent_t), + KM_SLEEP); + + if (cachefile[0] == '\0') + dp->scd_path = spa_strdup(spa_config_path); + else if (strcmp(cachefile, "none") == 0) + dp->scd_path = NULL; + else + dp->scd_path = spa_strdup(cachefile); + + list_insert_head(&spa->spa_config_list, dp); + if (need_sync) + spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); +} + +int +spa_prop_set(spa_t *spa, nvlist_t *nvp) +{ + int error; + nvpair_t *elem; + boolean_t need_sync = B_FALSE; + zpool_prop_t prop; + + if ((error = spa_prop_validate(spa, nvp)) != 0) + return (error); + + elem = NULL; + while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) { + if ((prop = zpool_name_to_prop( + nvpair_name(elem))) == ZPROP_INVAL) + return (EINVAL); + + if (prop == ZPOOL_PROP_CACHEFILE || + prop == ZPOOL_PROP_ALTROOT || + prop == ZPOOL_PROP_READONLY) + continue; + + need_sync = B_TRUE; + break; + } + + if (need_sync) + return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_sync_props, + spa, nvp, 3)); + else + return (0); +} + +/* + * If the bootfs property value is dsobj, clear it. + */ +void +spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) +{ + if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { + VERIFY(zap_remove(spa->spa_meta_objset, + spa->spa_pool_props_object, + zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0); + spa->spa_bootfs = 0; + } +} + +/* + * ========================================================================== + * SPA state manipulation (open/create/destroy/import/export) + * ========================================================================== + */ + +static int +spa_error_entry_compare(const void *a, const void *b) +{ + spa_error_entry_t *sa = (spa_error_entry_t *)a; + spa_error_entry_t *sb = (spa_error_entry_t *)b; + int ret; + + ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, + sizeof (zbookmark_t)); + + if (ret < 0) + return (-1); + else if (ret > 0) + return (1); + else + return (0); +} + +/* + * Utility function which retrieves copies of the current logs and + * re-initializes them in the process. + */ +void +spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) +{ + ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); + + bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); + bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); + + avl_create(&spa->spa_errlist_scrub, + spa_error_entry_compare, sizeof (spa_error_entry_t), + offsetof(spa_error_entry_t, se_avl)); + avl_create(&spa->spa_errlist_last, + spa_error_entry_compare, sizeof (spa_error_entry_t), + offsetof(spa_error_entry_t, se_avl)); +} + +static taskq_t * +spa_taskq_create(spa_t *spa, const char *name, enum zti_modes mode, + uint_t value) +{ + uint_t flags = TASKQ_PREPOPULATE; + boolean_t batch = B_FALSE; + + switch (mode) { + case zti_mode_null: + return (NULL); /* no taskq needed */ + + case zti_mode_fixed: + ASSERT3U(value, >=, 1); + value = MAX(value, 1); + break; + + case zti_mode_batch: + batch = B_TRUE; + flags |= TASKQ_THREADS_CPU_PCT; + value = zio_taskq_batch_pct; + break; + + case zti_mode_online_percent: + flags |= TASKQ_THREADS_CPU_PCT; + break; + + default: + panic("unrecognized mode for %s taskq (%u:%u) in " + "spa_activate()", + name, mode, value); + break; + } + + if (zio_taskq_sysdc && spa->spa_proc != &p0) { + if (batch) + flags |= TASKQ_DC_BATCH; + + return (taskq_create_sysdc(name, value, 50, INT_MAX, + spa->spa_proc, zio_taskq_basedc, flags)); + } + return (taskq_create_proc(name, value, maxclsyspri, 50, INT_MAX, + spa->spa_proc, flags)); +} + +static void +spa_create_zio_taskqs(spa_t *spa) +{ + for (int t = 0; t < ZIO_TYPES; t++) { + for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { + const zio_taskq_info_t *ztip = &zio_taskqs[t][q]; + enum zti_modes mode = ztip->zti_mode; + uint_t value = ztip->zti_value; + char name[32]; + + (void) snprintf(name, sizeof (name), + "%s_%s", zio_type_name[t], zio_taskq_types[q]); + + spa->spa_zio_taskq[t][q] = + spa_taskq_create(spa, name, mode, value); + } + } +} + +#ifdef _KERNEL +static void +spa_thread(void *arg) +{ + callb_cpr_t cprinfo; + + spa_t *spa = arg; + user_t *pu = PTOU(curproc); + + CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, + spa->spa_name); + + ASSERT(curproc != &p0); + (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), + "zpool-%s", spa->spa_name); + (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); + + /* bind this thread to the requested psrset */ + if (zio_taskq_psrset_bind != PS_NONE) { + pool_lock(); + mutex_enter(&cpu_lock); + mutex_enter(&pidlock); + mutex_enter(&curproc->p_lock); + + if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, + 0, NULL, NULL) == 0) { + curthread->t_bind_pset = zio_taskq_psrset_bind; + } else { + cmn_err(CE_WARN, + "Couldn't bind process for zfs pool \"%s\" to " + "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); + } + + mutex_exit(&curproc->p_lock); + mutex_exit(&pidlock); + mutex_exit(&cpu_lock); + pool_unlock(); + } + + if (zio_taskq_sysdc) { + sysdc_thread_enter(curthread, 100, 0); + } + + spa->spa_proc = curproc; + spa->spa_did = curthread->t_did; + + spa_create_zio_taskqs(spa); + + mutex_enter(&spa->spa_proc_lock); + ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); + + spa->spa_proc_state = SPA_PROC_ACTIVE; + cv_broadcast(&spa->spa_proc_cv); + + CALLB_CPR_SAFE_BEGIN(&cprinfo); + while (spa->spa_proc_state == SPA_PROC_ACTIVE) + cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); + CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); + + ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); + spa->spa_proc_state = SPA_PROC_GONE; + spa->spa_proc = &p0; + cv_broadcast(&spa->spa_proc_cv); + CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ + + mutex_enter(&curproc->p_lock); + lwp_exit(); +} +#endif + +/* + * Activate an uninitialized pool. + */ +static void +spa_activate(spa_t *spa, int mode) +{ + ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); + + spa->spa_state = POOL_STATE_ACTIVE; + spa->spa_mode = mode; + + spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); + spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); + + /* Try to create a covering process */ + mutex_enter(&spa->spa_proc_lock); + ASSERT(spa->spa_proc_state == SPA_PROC_NONE); + ASSERT(spa->spa_proc == &p0); + spa->spa_did = 0; + + /* Only create a process if we're going to be around a while. */ + if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { + if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, + NULL, 0) == 0) { + spa->spa_proc_state = SPA_PROC_CREATED; + while (spa->spa_proc_state == SPA_PROC_CREATED) { + cv_wait(&spa->spa_proc_cv, + &spa->spa_proc_lock); + } + ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); + ASSERT(spa->spa_proc != &p0); + ASSERT(spa->spa_did != 0); + } else { +#ifdef _KERNEL + cmn_err(CE_WARN, + "Couldn't create process for zfs pool \"%s\"\n", + spa->spa_name); +#endif + } + } + mutex_exit(&spa->spa_proc_lock); + + /* If we didn't create a process, we need to create our taskqs. */ + if (spa->spa_proc == &p0) { + spa_create_zio_taskqs(spa); + } + + list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), + offsetof(vdev_t, vdev_config_dirty_node)); + list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), + offsetof(vdev_t, vdev_state_dirty_node)); + + txg_list_create(&spa->spa_vdev_txg_list, + offsetof(struct vdev, vdev_txg_node)); + + avl_create(&spa->spa_errlist_scrub, + spa_error_entry_compare, sizeof (spa_error_entry_t), + offsetof(spa_error_entry_t, se_avl)); + avl_create(&spa->spa_errlist_last, + spa_error_entry_compare, sizeof (spa_error_entry_t), + offsetof(spa_error_entry_t, se_avl)); +} + +/* + * Opposite of spa_activate(). + */ +static void +spa_deactivate(spa_t *spa) +{ + ASSERT(spa->spa_sync_on == B_FALSE); + ASSERT(spa->spa_dsl_pool == NULL); + ASSERT(spa->spa_root_vdev == NULL); + ASSERT(spa->spa_async_zio_root == NULL); + ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); + + txg_list_destroy(&spa->spa_vdev_txg_list); + + list_destroy(&spa->spa_config_dirty_list); + list_destroy(&spa->spa_state_dirty_list); + + for (int t = 0; t < ZIO_TYPES; t++) { + for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { + if (spa->spa_zio_taskq[t][q] != NULL) + taskq_destroy(spa->spa_zio_taskq[t][q]); + spa->spa_zio_taskq[t][q] = NULL; + } + } + + metaslab_class_destroy(spa->spa_normal_class); + spa->spa_normal_class = NULL; + + metaslab_class_destroy(spa->spa_log_class); + spa->spa_log_class = NULL; + + /* + * If this was part of an import or the open otherwise failed, we may + * still have errors left in the queues. Empty them just in case. + */ + spa_errlog_drain(spa); + + avl_destroy(&spa->spa_errlist_scrub); + avl_destroy(&spa->spa_errlist_last); + + spa->spa_state = POOL_STATE_UNINITIALIZED; + + mutex_enter(&spa->spa_proc_lock); + if (spa->spa_proc_state != SPA_PROC_NONE) { + ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); + spa->spa_proc_state = SPA_PROC_DEACTIVATE; + cv_broadcast(&spa->spa_proc_cv); + while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { + ASSERT(spa->spa_proc != &p0); + cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); + } + ASSERT(spa->spa_proc_state == SPA_PROC_GONE); + spa->spa_proc_state = SPA_PROC_NONE; + } + ASSERT(spa->spa_proc == &p0); + mutex_exit(&spa->spa_proc_lock); + + /* + * We want to make sure spa_thread() has actually exited the ZFS + * module, so that the module can't be unloaded out from underneath + * it. + */ + if (spa->spa_did != 0) { + thread_join(spa->spa_did); + spa->spa_did = 0; + } +} + +/* + * Verify a pool configuration, and construct the vdev tree appropriately. This + * will create all the necessary vdevs in the appropriate layout, with each vdev + * in the CLOSED state. This will prep the pool before open/creation/import. + * All vdev validation is done by the vdev_alloc() routine. + */ +static int +spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, + uint_t id, int atype) +{ + nvlist_t **child; + uint_t children; + int error; + + if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) + return (error); + + if ((*vdp)->vdev_ops->vdev_op_leaf) + return (0); + + error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, + &child, &children); + + if (error == ENOENT) + return (0); + + if (error) { + vdev_free(*vdp); + *vdp = NULL; + return (EINVAL); + } + + for (int c = 0; c < children; c++) { + vdev_t *vd; + if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, + atype)) != 0) { + vdev_free(*vdp); + *vdp = NULL; + return (error); + } + } + + ASSERT(*vdp != NULL); + + return (0); +} + +/* + * Opposite of spa_load(). + */ +static void +spa_unload(spa_t *spa) +{ + int i; + + ASSERT(MUTEX_HELD(&spa_namespace_lock)); + + /* + * Stop async tasks. + */ + spa_async_suspend(spa); + + /* + * Stop syncing. + */ + if (spa->spa_sync_on) { + txg_sync_stop(spa->spa_dsl_pool); + spa->spa_sync_on = B_FALSE; + } + + /* + * Wait for any outstanding async I/O to complete. + */ + if (spa->spa_async_zio_root != NULL) { + (void) zio_wait(spa->spa_async_zio_root); + spa->spa_async_zio_root = NULL; + } + + bpobj_close(&spa->spa_deferred_bpobj); + + /* + * Close the dsl pool. + */ + if (spa->spa_dsl_pool) { + dsl_pool_close(spa->spa_dsl_pool); + spa->spa_dsl_pool = NULL; + spa->spa_meta_objset = NULL; + } + + ddt_unload(spa); + + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + + /* + * Drop and purge level 2 cache + */ + spa_l2cache_drop(spa); + + /* + * Close all vdevs. + */ + if (spa->spa_root_vdev) + vdev_free(spa->spa_root_vdev); + ASSERT(spa->spa_root_vdev == NULL); + + for (i = 0; i < spa->spa_spares.sav_count; i++) + vdev_free(spa->spa_spares.sav_vdevs[i]); + if (spa->spa_spares.sav_vdevs) { + kmem_free(spa->spa_spares.sav_vdevs, + spa->spa_spares.sav_count * sizeof (void *)); + spa->spa_spares.sav_vdevs = NULL; + } + if (spa->spa_spares.sav_config) { + nvlist_free(spa->spa_spares.sav_config); + spa->spa_spares.sav_config = NULL; + } + spa->spa_spares.sav_count = 0; + + for (i = 0; i < spa->spa_l2cache.sav_count; i++) + vdev_free(spa->spa_l2cache.sav_vdevs[i]); + if (spa->spa_l2cache.sav_vdevs) { + kmem_free(spa->spa_l2cache.sav_vdevs, + spa->spa_l2cache.sav_count * sizeof (void *)); + spa->spa_l2cache.sav_vdevs = NULL; + } + if (spa->spa_l2cache.sav_config) { + nvlist_free(spa->spa_l2cache.sav_config); + spa->spa_l2cache.sav_config = NULL; + } + spa->spa_l2cache.sav_count = 0; + + spa->spa_async_suspended = 0; + + spa_config_exit(spa, SCL_ALL, FTAG); +} + +/* + * Load (or re-load) the current list of vdevs describing the active spares for + * this pool. When this is called, we have some form of basic information in + * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and + * then re-generate a more complete list including status information. + */ +static void +spa_load_spares(spa_t *spa) +{ + nvlist_t **spares; + uint_t nspares; + int i; + vdev_t *vd, *tvd; + + ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); + + /* + * First, close and free any existing spare vdevs. + */ + for (i = 0; i < spa->spa_spares.sav_count; i++) { + vd = spa->spa_spares.sav_vdevs[i]; + + /* Undo the call to spa_activate() below */ + if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, + B_FALSE)) != NULL && tvd->vdev_isspare) + spa_spare_remove(tvd); + vdev_close(vd); + vdev_free(vd); + } + + if (spa->spa_spares.sav_vdevs) + kmem_free(spa->spa_spares.sav_vdevs, + spa->spa_spares.sav_count * sizeof (void *)); + + if (spa->spa_spares.sav_config == NULL) + nspares = 0; + else + VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, + ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); + + spa->spa_spares.sav_count = (int)nspares; + spa->spa_spares.sav_vdevs = NULL; + + if (nspares == 0) + return; + + /* + * Construct the array of vdevs, opening them to get status in the + * process. For each spare, there is potentially two different vdev_t + * structures associated with it: one in the list of spares (used only + * for basic validation purposes) and one in the active vdev + * configuration (if it's spared in). During this phase we open and + * validate each vdev on the spare list. If the vdev also exists in the + * active configuration, then we also mark this vdev as an active spare. + */ + spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), + KM_SLEEP); + for (i = 0; i < spa->spa_spares.sav_count; i++) { + VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, + VDEV_ALLOC_SPARE) == 0); + ASSERT(vd != NULL); + + spa->spa_spares.sav_vdevs[i] = vd; + + if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, + B_FALSE)) != NULL) { + if (!tvd->vdev_isspare) + spa_spare_add(tvd); + + /* + * We only mark the spare active if we were successfully + * able to load the vdev. Otherwise, importing a pool + * with a bad active spare would result in strange + * behavior, because multiple pool would think the spare + * is actively in use. + * + * There is a vulnerability here to an equally bizarre + * circumstance, where a dead active spare is later + * brought back to life (onlined or otherwise). Given + * the rarity of this scenario, and the extra complexity + * it adds, we ignore the possibility. + */ + if (!vdev_is_dead(tvd)) + spa_spare_activate(tvd); + } + + vd->vdev_top = vd; + vd->vdev_aux = &spa->spa_spares; + + if (vdev_open(vd) != 0) + continue; + + if (vdev_validate_aux(vd) == 0) + spa_spare_add(vd); + } + + /* + * Recompute the stashed list of spares, with status information + * this time. + */ + VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, + DATA_TYPE_NVLIST_ARRAY) == 0); + + spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), + KM_SLEEP); + for (i = 0; i < spa->spa_spares.sav_count; i++) + spares[i] = vdev_config_generate(spa, + spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); + VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, + ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); + for (i = 0; i < spa->spa_spares.sav_count; i++) + nvlist_free(spares[i]); + kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); +} + +/* + * Load (or re-load) the current list of vdevs describing the active l2cache for + * this pool. When this is called, we have some form of basic information in + * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and + * then re-generate a more complete list including status information. + * Devices which are already active have their details maintained, and are + * not re-opened. + */ +static void +spa_load_l2cache(spa_t *spa) +{ + nvlist_t **l2cache; + uint_t nl2cache; + int i, j, oldnvdevs; + uint64_t guid; + vdev_t *vd, **oldvdevs, **newvdevs; + spa_aux_vdev_t *sav = &spa->spa_l2cache; + + ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); + + if (sav->sav_config != NULL) { + VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, + ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); + newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); + } else { + nl2cache = 0; + } + + oldvdevs = sav->sav_vdevs; + oldnvdevs = sav->sav_count; + sav->sav_vdevs = NULL; + sav->sav_count = 0; + + /* + * Process new nvlist of vdevs. + */ + for (i = 0; i < nl2cache; i++) { + VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, + &guid) == 0); + + newvdevs[i] = NULL; + for (j = 0; j < oldnvdevs; j++) { + vd = oldvdevs[j]; + if (vd != NULL && guid == vd->vdev_guid) { + /* + * Retain previous vdev for add/remove ops. + */ + newvdevs[i] = vd; + oldvdevs[j] = NULL; + break; + } + } + + if (newvdevs[i] == NULL) { + /* + * Create new vdev + */ + VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, + VDEV_ALLOC_L2CACHE) == 0); + ASSERT(vd != NULL); + newvdevs[i] = vd; + + /* + * Commit this vdev as an l2cache device, + * even if it fails to open. + */ + spa_l2cache_add(vd); + + vd->vdev_top = vd; + vd->vdev_aux = sav; + + spa_l2cache_activate(vd); + + if (vdev_open(vd) != 0) + continue; + + (void) vdev_validate_aux(vd); + + if (!vdev_is_dead(vd)) + l2arc_add_vdev(spa, vd); + } + } + + /* + * Purge vdevs that were dropped + */ + for (i = 0; i < oldnvdevs; i++) { + uint64_t pool; + + vd = oldvdevs[i]; + if (vd != NULL) { + if (spa_l2cache_exists(vd->vdev_guid, &pool) && + pool != 0ULL && l2arc_vdev_present(vd)) + l2arc_remove_vdev(vd); + (void) vdev_close(vd); + spa_l2cache_remove(vd); + } + } + + if (oldvdevs) + kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); + + if (sav->sav_config == NULL) + goto out; + + sav->sav_vdevs = newvdevs; + sav->sav_count = (int)nl2cache; + + /* + * Recompute the stashed list of l2cache devices, with status + * information this time. + */ + VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, + DATA_TYPE_NVLIST_ARRAY) == 0); + + l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); + for (i = 0; i < sav->sav_count; i++) + l2cache[i] = vdev_config_generate(spa, + sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); + VERIFY(nvlist_add_nvlist_array(sav->sav_config, + ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); +out: + for (i = 0; i < sav->sav_count; i++) + nvlist_free(l2cache[i]); + if (sav->sav_count) + kmem_free(l2cache, sav->sav_count * sizeof (void *)); +} + +static int +load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) +{ + dmu_buf_t *db; + char *packed = NULL; + size_t nvsize = 0; + int error; + *value = NULL; + + VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); + nvsize = *(uint64_t *)db->db_data; + dmu_buf_rele(db, FTAG); + + packed = kmem_alloc(nvsize, KM_SLEEP); + error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, + DMU_READ_PREFETCH); + if (error == 0) + error = nvlist_unpack(packed, nvsize, value, 0); + kmem_free(packed, nvsize); + + return (error); +} + +/* + * Checks to see if the given vdev could not be opened, in which case we post a + * sysevent to notify the autoreplace code that the device has been removed. + */ +static void +spa_check_removed(vdev_t *vd) +{ + for (int c = 0; c < vd->vdev_children; c++) + spa_check_removed(vd->vdev_child[c]); + + if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd)) { + zfs_post_autoreplace(vd->vdev_spa, vd); + spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK); + } +} + +/* + * Validate the current config against the MOS config + */ +static boolean_t +spa_config_valid(spa_t *spa, nvlist_t *config) +{ + vdev_t *mrvd, *rvd = spa->spa_root_vdev; + nvlist_t *nv; + + VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0); + + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); + + ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children); + + /* + * If we're doing a normal import, then build up any additional + * diagnostic information about missing devices in this config. + * We'll pass this up to the user for further processing. + */ + if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { + nvlist_t **child, *nv; + uint64_t idx = 0; + + child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), + KM_SLEEP); + VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); + + for (int c = 0; c < rvd->vdev_children; c++) { + vdev_t *tvd = rvd->vdev_child[c]; + vdev_t *mtvd = mrvd->vdev_child[c]; + + if (tvd->vdev_ops == &vdev_missing_ops && + mtvd->vdev_ops != &vdev_missing_ops && + mtvd->vdev_islog) + child[idx++] = vdev_config_generate(spa, mtvd, + B_FALSE, 0); + } + + if (idx) { + VERIFY(nvlist_add_nvlist_array(nv, + ZPOOL_CONFIG_CHILDREN, child, idx) == 0); + VERIFY(nvlist_add_nvlist(spa->spa_load_info, + ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0); + + for (int i = 0; i < idx; i++) + nvlist_free(child[i]); + } + nvlist_free(nv); + kmem_free(child, rvd->vdev_children * sizeof (char **)); + } + + /* + * Compare the root vdev tree with the information we have + * from the MOS config (mrvd). Check each top-level vdev + * with the corresponding MOS config top-level (mtvd). + */ + for (int c = 0; c < rvd->vdev_children; c++) { + vdev_t *tvd = rvd->vdev_child[c]; + vdev_t *mtvd = mrvd->vdev_child[c]; + + /* + * Resolve any "missing" vdevs in the current configuration. + * If we find that the MOS config has more accurate information + * about the top-level vdev then use that vdev instead. + */ + if (tvd->vdev_ops == &vdev_missing_ops && + mtvd->vdev_ops != &vdev_missing_ops) { + + if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) + continue; + + /* + * Device specific actions. + */ + if (mtvd->vdev_islog) { + spa_set_log_state(spa, SPA_LOG_CLEAR); + } else { + /* + * XXX - once we have 'readonly' pool + * support we should be able to handle + * missing data devices by transitioning + * the pool to readonly. + */ + continue; + } + + /* + * Swap the missing vdev with the data we were + * able to obtain from the MOS config. + */ + vdev_remove_child(rvd, tvd); + vdev_remove_child(mrvd, mtvd); + + vdev_add_child(rvd, mtvd); + vdev_add_child(mrvd, tvd); + + spa_config_exit(spa, SCL_ALL, FTAG); + vdev_load(mtvd); + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + + vdev_reopen(rvd); + } else if (mtvd->vdev_islog) { + /* + * Load the slog device's state from the MOS config + * since it's possible that the label does not + * contain the most up-to-date information. + */ + vdev_load_log_state(tvd, mtvd); + vdev_reopen(tvd); + } + } + vdev_free(mrvd); + spa_config_exit(spa, SCL_ALL, FTAG); + + /* + * Ensure we were able to validate the config. + */ + return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum); +} + +/* + * Check for missing log devices + */ +static int +spa_check_logs(spa_t *spa) +{ + switch (spa->spa_log_state) { + case SPA_LOG_MISSING: + /* need to recheck in case slog has been restored */ + case SPA_LOG_UNKNOWN: + if (dmu_objset_find(spa->spa_name, zil_check_log_chain, NULL, + DS_FIND_CHILDREN)) { + spa_set_log_state(spa, SPA_LOG_MISSING); + return (1); + } + break; + } + return (0); +} + +static boolean_t +spa_passivate_log(spa_t *spa) +{ + vdev_t *rvd = spa->spa_root_vdev; + boolean_t slog_found = B_FALSE; + + ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); + + if (!spa_has_slogs(spa)) + return (B_FALSE); + + for (int c = 0; c < rvd->vdev_children; c++) { + vdev_t *tvd = rvd->vdev_child[c]; + metaslab_group_t *mg = tvd->vdev_mg; + + if (tvd->vdev_islog) { + metaslab_group_passivate(mg); + slog_found = B_TRUE; + } + } + + return (slog_found); +} + +static void +spa_activate_log(spa_t *spa) +{ + vdev_t *rvd = spa->spa_root_vdev; + + ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); + + for (int c = 0; c < rvd->vdev_children; c++) { + vdev_t *tvd = rvd->vdev_child[c]; + metaslab_group_t *mg = tvd->vdev_mg; + + if (tvd->vdev_islog) + metaslab_group_activate(mg); + } +} + +int +spa_offline_log(spa_t *spa) +{ + int error = 0; + + if ((error = dmu_objset_find(spa_name(spa), zil_vdev_offline, + NULL, DS_FIND_CHILDREN)) == 0) { + + /* + * We successfully offlined the log device, sync out the + * current txg so that the "stubby" block can be removed + * by zil_sync(). + */ + txg_wait_synced(spa->spa_dsl_pool, 0); + } + return (error); +} + +static void +spa_aux_check_removed(spa_aux_vdev_t *sav) +{ + for (int i = 0; i < sav->sav_count; i++) + spa_check_removed(sav->sav_vdevs[i]); +} + +void +spa_claim_notify(zio_t *zio) +{ + spa_t *spa = zio->io_spa; + + if (zio->io_error) + return; + + mutex_enter(&spa->spa_props_lock); /* any mutex will do */ + if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) + spa->spa_claim_max_txg = zio->io_bp->blk_birth; + mutex_exit(&spa->spa_props_lock); +} + +typedef struct spa_load_error { + uint64_t sle_meta_count; + uint64_t sle_data_count; +} spa_load_error_t; + +static void +spa_load_verify_done(zio_t *zio) +{ + blkptr_t *bp = zio->io_bp; + spa_load_error_t *sle = zio->io_private; + dmu_object_type_t type = BP_GET_TYPE(bp); + int error = zio->io_error; + + if (error) { + if ((BP_GET_LEVEL(bp) != 0 || dmu_ot[type].ot_metadata) && + type != DMU_OT_INTENT_LOG) + atomic_add_64(&sle->sle_meta_count, 1); + else + atomic_add_64(&sle->sle_data_count, 1); + } + zio_data_buf_free(zio->io_data, zio->io_size); +} + +/*ARGSUSED*/ +static int +spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, + arc_buf_t *pbuf, const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg) +{ + if (bp != NULL) { + zio_t *rio = arg; + size_t size = BP_GET_PSIZE(bp); + void *data = zio_data_buf_alloc(size); + + zio_nowait(zio_read(rio, spa, bp, data, size, + spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, + ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | + ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); + } + return (0); +} + +static int +spa_load_verify(spa_t *spa) +{ + zio_t *rio; + spa_load_error_t sle = { 0 }; + zpool_rewind_policy_t policy; + boolean_t verify_ok = B_FALSE; + int error; + + zpool_get_rewind_policy(spa->spa_config, &policy); + + if (policy.zrp_request & ZPOOL_NEVER_REWIND) + return (0); + + rio = zio_root(spa, NULL, &sle, + ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); + + error = traverse_pool(spa, spa->spa_verify_min_txg, + TRAVERSE_PRE | TRAVERSE_PREFETCH, spa_load_verify_cb, rio); + + (void) zio_wait(rio); + + spa->spa_load_meta_errors = sle.sle_meta_count; + spa->spa_load_data_errors = sle.sle_data_count; + + if (!error && sle.sle_meta_count <= policy.zrp_maxmeta && + sle.sle_data_count <= policy.zrp_maxdata) { + int64_t loss = 0; + + verify_ok = B_TRUE; + spa->spa_load_txg = spa->spa_uberblock.ub_txg; + spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; + + loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; + VERIFY(nvlist_add_uint64(spa->spa_load_info, + ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); + VERIFY(nvlist_add_int64(spa->spa_load_info, + ZPOOL_CONFIG_REWIND_TIME, loss) == 0); + VERIFY(nvlist_add_uint64(spa->spa_load_info, + ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); + } else { + spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; + } + + if (error) { + if (error != ENXIO && error != EIO) + error = EIO; + return (error); + } + + return (verify_ok ? 0 : EIO); +} + +/* + * Find a value in the pool props object. + */ +static void +spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) +{ + (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, + zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); +} + +/* + * Find a value in the pool directory object. + */ +static int +spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) +{ + return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, + name, sizeof (uint64_t), 1, val)); +} + +static int +spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) +{ + vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); + return (err); +} + +/* + * Fix up config after a partly-completed split. This is done with the + * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off + * pool have that entry in their config, but only the splitting one contains + * a list of all the guids of the vdevs that are being split off. + * + * This function determines what to do with that list: either rejoin + * all the disks to the pool, or complete the splitting process. To attempt + * the rejoin, each disk that is offlined is marked online again, and + * we do a reopen() call. If the vdev label for every disk that was + * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) + * then we call vdev_split() on each disk, and complete the split. + * + * Otherwise we leave the config alone, with all the vdevs in place in + * the original pool. + */ +static void +spa_try_repair(spa_t *spa, nvlist_t *config) +{ + uint_t extracted; + uint64_t *glist; + uint_t i, gcount; + nvlist_t *nvl; + vdev_t **vd; + boolean_t attempt_reopen; + + if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) + return; + + /* check that the config is complete */ + if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, + &glist, &gcount) != 0) + return; + + vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); + + /* attempt to online all the vdevs & validate */ + attempt_reopen = B_TRUE; + for (i = 0; i < gcount; i++) { + if (glist[i] == 0) /* vdev is hole */ + continue; + + vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); + if (vd[i] == NULL) { + /* + * Don't bother attempting to reopen the disks; + * just do the split. + */ + attempt_reopen = B_FALSE; + } else { + /* attempt to re-online it */ + vd[i]->vdev_offline = B_FALSE; + } + } + + if (attempt_reopen) { + vdev_reopen(spa->spa_root_vdev); + + /* check each device to see what state it's in */ + for (extracted = 0, i = 0; i < gcount; i++) { + if (vd[i] != NULL && + vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) + break; + ++extracted; + } + } + + /* + * If every disk has been moved to the new pool, or if we never + * even attempted to look at them, then we split them off for + * good. + */ + if (!attempt_reopen || gcount == extracted) { + for (i = 0; i < gcount; i++) + if (vd[i] != NULL) + vdev_split(vd[i]); + vdev_reopen(spa->spa_root_vdev); + } + + kmem_free(vd, gcount * sizeof (vdev_t *)); +} + +static int +spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type, + boolean_t mosconfig) +{ + nvlist_t *config = spa->spa_config; + char *ereport = FM_EREPORT_ZFS_POOL; + int error; + uint64_t pool_guid; + nvlist_t *nvl; + + if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) + return (EINVAL); + + /* + * Versioning wasn't explicitly added to the label until later, so if + * it's not present treat it as the initial version. + */ + if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, + &spa->spa_ubsync.ub_version) != 0) + spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; + + (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, + &spa->spa_config_txg); + + if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && + spa_guid_exists(pool_guid, 0)) { + error = EEXIST; + } else { + spa->spa_load_guid = pool_guid; + + if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, + &nvl) == 0) { + VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting, + KM_SLEEP) == 0); + } + + gethrestime(&spa->spa_loaded_ts); + error = spa_load_impl(spa, pool_guid, config, state, type, + mosconfig, &ereport); + } + + spa->spa_minref = refcount_count(&spa->spa_refcount); + if (error) { + if (error != EEXIST) { + spa->spa_loaded_ts.tv_sec = 0; + spa->spa_loaded_ts.tv_nsec = 0; + } + if (error != EBADF) { + zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0); + } + } + spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; + spa->spa_ena = 0; + + return (error); +} + +/* + * Load an existing storage pool, using the pool's builtin spa_config as a + * source of configuration information. + */ +static int +spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config, + spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, + char **ereport) +{ + int error = 0; + nvlist_t *nvroot = NULL; + vdev_t *rvd; + uberblock_t *ub = &spa->spa_uberblock; + uint64_t children, config_cache_txg = spa->spa_config_txg; + int orig_mode = spa->spa_mode; + int parse; + uint64_t obj; + + /* + * If this is an untrusted config, access the pool in read-only mode. + * This prevents things like resilvering recently removed devices. + */ + if (!mosconfig) + spa->spa_mode = FREAD; + + ASSERT(MUTEX_HELD(&spa_namespace_lock)); + + spa->spa_load_state = state; + + if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot)) + return (EINVAL); + + parse = (type == SPA_IMPORT_EXISTING ? + VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); + + /* + * Create "The Godfather" zio to hold all async IOs + */ + spa->spa_async_zio_root = zio_root(spa, NULL, NULL, + ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); + + /* + * Parse the configuration into a vdev tree. We explicitly set the + * value that will be returned by spa_version() since parsing the + * configuration requires knowing the version number. + */ + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); + spa_config_exit(spa, SCL_ALL, FTAG); + + if (error != 0) + return (error); + + ASSERT(spa->spa_root_vdev == rvd); + + if (type != SPA_IMPORT_ASSEMBLE) { + ASSERT(spa_guid(spa) == pool_guid); + } + + /* + * Try to open all vdevs, loading each label in the process. + */ + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + error = vdev_open(rvd); + spa_config_exit(spa, SCL_ALL, FTAG); + if (error != 0) + return (error); + + /* + * We need to validate the vdev labels against the configuration that + * we have in hand, which is dependent on the setting of mosconfig. If + * mosconfig is true then we're validating the vdev labels based on + * that config. Otherwise, we're validating against the cached config + * (zpool.cache) that was read when we loaded the zfs module, and then + * later we will recursively call spa_load() and validate against + * the vdev config. + * + * If we're assembling a new pool that's been split off from an + * existing pool, the labels haven't yet been updated so we skip + * validation for now. + */ + if (type != SPA_IMPORT_ASSEMBLE) { + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + error = vdev_validate(rvd); + spa_config_exit(spa, SCL_ALL, FTAG); + + if (error != 0) + return (error); + + if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) + return (ENXIO); + } + + /* + * Find the best uberblock. + */ + vdev_uberblock_load(NULL, rvd, ub); + + /* + * If we weren't able to find a single valid uberblock, return failure. + */ + if (ub->ub_txg == 0) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); + + /* + * If the pool is newer than the code, we can't open it. + */ + if (ub->ub_version > SPA_VERSION) + return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); + + /* + * If the vdev guid sum doesn't match the uberblock, we have an + * incomplete configuration. We first check to see if the pool + * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN). + * If it is, defer the vdev_guid_sum check till later so we + * can handle missing vdevs. + */ + if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, + &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE && + rvd->vdev_guid_sum != ub->ub_guid_sum) + return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); + + if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + spa_try_repair(spa, config); + spa_config_exit(spa, SCL_ALL, FTAG); + nvlist_free(spa->spa_config_splitting); + spa->spa_config_splitting = NULL; + } + + /* + * Initialize internal SPA structures. + */ + spa->spa_state = POOL_STATE_ACTIVE; + spa->spa_ubsync = spa->spa_uberblock; + spa->spa_verify_min_txg = spa->spa_extreme_rewind ? + TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; + spa->spa_first_txg = spa->spa_last_ubsync_txg ? + spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; + spa->spa_claim_max_txg = spa->spa_first_txg; + spa->spa_prev_software_version = ub->ub_software_version; + + error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool); + if (error) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; + + if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + if (!mosconfig) { + uint64_t hostid; + nvlist_t *policy = NULL, *nvconfig; + + if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, + ZPOOL_CONFIG_HOSTID, &hostid) == 0) { + char *hostname; + unsigned long myhostid = 0; + + VERIFY(nvlist_lookup_string(nvconfig, + ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); + +#ifdef _KERNEL + myhostid = zone_get_hostid(NULL); +#else /* _KERNEL */ + /* + * We're emulating the system's hostid in userland, so + * we can't use zone_get_hostid(). + */ + (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid); +#endif /* _KERNEL */ + if (hostid != 0 && myhostid != 0 && + hostid != myhostid) { + nvlist_free(nvconfig); + cmn_err(CE_WARN, "pool '%s' could not be " + "loaded as it was last accessed by " + "another system (host: %s hostid: 0x%lx). " + "See: http://www.sun.com/msg/ZFS-8000-EY", + spa_name(spa), hostname, + (unsigned long)hostid); + return (EBADF); + } + } + if (nvlist_lookup_nvlist(spa->spa_config, + ZPOOL_REWIND_POLICY, &policy) == 0) + VERIFY(nvlist_add_nvlist(nvconfig, + ZPOOL_REWIND_POLICY, policy) == 0); + + spa_config_set(spa, nvconfig); + spa_unload(spa); + spa_deactivate(spa); + spa_activate(spa, orig_mode); + + return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); + } + + if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); + if (error != 0) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + /* + * Load the bit that tells us to use the new accounting function + * (raid-z deflation). If we have an older pool, this will not + * be present. + */ + error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate); + if (error != 0 && error != ENOENT) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, + &spa->spa_creation_version); + if (error != 0 && error != ENOENT) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + /* + * Load the persistent error log. If we have an older pool, this will + * not be present. + */ + error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last); + if (error != 0 && error != ENOENT) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, + &spa->spa_errlog_scrub); + if (error != 0 && error != ENOENT) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + /* + * Load the history object. If we have an older pool, this + * will not be present. + */ + error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history); + if (error != 0 && error != ENOENT) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + /* + * If we're assembling the pool from the split-off vdevs of + * an existing pool, we don't want to attach the spares & cache + * devices. + */ + + /* + * Load any hot spares for this pool. + */ + error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object); + if (error != 0 && error != ENOENT) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { + ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); + if (load_nvlist(spa, spa->spa_spares.sav_object, + &spa->spa_spares.sav_config) != 0) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + spa_load_spares(spa); + spa_config_exit(spa, SCL_ALL, FTAG); + } else if (error == 0) { + spa->spa_spares.sav_sync = B_TRUE; + } + + /* + * Load any level 2 ARC devices for this pool. + */ + error = spa_dir_prop(spa, DMU_POOL_L2CACHE, + &spa->spa_l2cache.sav_object); + if (error != 0 && error != ENOENT) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { + ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); + if (load_nvlist(spa, spa->spa_l2cache.sav_object, + &spa->spa_l2cache.sav_config) != 0) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + spa_load_l2cache(spa); + spa_config_exit(spa, SCL_ALL, FTAG); + } else if (error == 0) { + spa->spa_l2cache.sav_sync = B_TRUE; + } + + spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); + + error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object); + if (error && error != ENOENT) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + if (error == 0) { + uint64_t autoreplace; + + spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); + spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); + spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); + spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); + spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); + spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, + &spa->spa_dedup_ditto); + + spa->spa_autoreplace = (autoreplace != 0); + } + + /* + * If the 'autoreplace' property is set, then post a resource notifying + * the ZFS DE that it should not issue any faults for unopenable + * devices. We also iterate over the vdevs, and post a sysevent for any + * unopenable vdevs so that the normal autoreplace handler can take + * over. + */ + if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) { + spa_check_removed(spa->spa_root_vdev); + /* + * For the import case, this is done in spa_import(), because + * at this point we're using the spare definitions from + * the MOS config, not necessarily from the userland config. + */ + if (state != SPA_LOAD_IMPORT) { + spa_aux_check_removed(&spa->spa_spares); + spa_aux_check_removed(&spa->spa_l2cache); + } + } + + /* + * Load the vdev state for all toplevel vdevs. + */ + vdev_load(rvd); + + /* + * Propagate the leaf DTLs we just loaded all the way up the tree. + */ + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + vdev_dtl_reassess(rvd, 0, 0, B_FALSE); + spa_config_exit(spa, SCL_ALL, FTAG); + + /* + * Load the DDTs (dedup tables). + */ + error = ddt_load(spa); + if (error != 0) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + spa_update_dspace(spa); + + /* + * Validate the config, using the MOS config to fill in any + * information which might be missing. If we fail to validate + * the config then declare the pool unfit for use. If we're + * assembling a pool from a split, the log is not transferred + * over. + */ + if (type != SPA_IMPORT_ASSEMBLE) { + nvlist_t *nvconfig; + + if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + if (!spa_config_valid(spa, nvconfig)) { + nvlist_free(nvconfig); + return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, + ENXIO)); + } + nvlist_free(nvconfig); + + /* + * Now that we've validate the config, check the state of the + * root vdev. If it can't be opened, it indicates one or + * more toplevel vdevs are faulted. + */ + if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) + return (ENXIO); + + if (spa_check_logs(spa)) { + *ereport = FM_EREPORT_ZFS_LOG_REPLAY; + return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO)); + } + } + + /* + * We've successfully opened the pool, verify that we're ready + * to start pushing transactions. + */ + if (state != SPA_LOAD_TRYIMPORT) { + if (error = spa_load_verify(spa)) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, + error)); + } + + if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER || + spa->spa_load_max_txg == UINT64_MAX)) { + dmu_tx_t *tx; + int need_update = B_FALSE; + + ASSERT(state != SPA_LOAD_TRYIMPORT); + + /* + * Claim log blocks that haven't been committed yet. + * This must all happen in a single txg. + * Note: spa_claim_max_txg is updated by spa_claim_notify(), + * invoked from zil_claim_log_block()'s i/o done callback. + * Price of rollback is that we abandon the log. + */ + spa->spa_claiming = B_TRUE; + + tx = dmu_tx_create_assigned(spa_get_dsl(spa), + spa_first_txg(spa)); + (void) dmu_objset_find(spa_name(spa), + zil_claim, tx, DS_FIND_CHILDREN); + dmu_tx_commit(tx); + + spa->spa_claiming = B_FALSE; + + spa_set_log_state(spa, SPA_LOG_GOOD); + spa->spa_sync_on = B_TRUE; + txg_sync_start(spa->spa_dsl_pool); + + /* + * Wait for all claims to sync. We sync up to the highest + * claimed log block birth time so that claimed log blocks + * don't appear to be from the future. spa_claim_max_txg + * will have been set for us by either zil_check_log_chain() + * (invoked from spa_check_logs()) or zil_claim() above. + */ + txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); + + /* + * If the config cache is stale, or we have uninitialized + * metaslabs (see spa_vdev_add()), then update the config. + * + * If this is a verbatim import, trust the current + * in-core spa_config and update the disk labels. + */ + if (config_cache_txg != spa->spa_config_txg || + state == SPA_LOAD_IMPORT || + state == SPA_LOAD_RECOVER || + (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) + need_update = B_TRUE; + + for (int c = 0; c < rvd->vdev_children; c++) + if (rvd->vdev_child[c]->vdev_ms_array == 0) + need_update = B_TRUE; + + /* + * Update the config cache asychronously in case we're the + * root pool, in which case the config cache isn't writable yet. + */ + if (need_update) + spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); + + /* + * Check all DTLs to see if anything needs resilvering. + */ + if (!dsl_scan_resilvering(spa->spa_dsl_pool) && + vdev_resilver_needed(rvd, NULL, NULL)) + spa_async_request(spa, SPA_ASYNC_RESILVER); + + /* + * Delete any inconsistent datasets. + */ + (void) dmu_objset_find(spa_name(spa), + dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); + + /* + * Clean up any stale temporary dataset userrefs. + */ + dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); + } + + return (0); +} + +static int +spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig) +{ + int mode = spa->spa_mode; + + spa_unload(spa); + spa_deactivate(spa); + + spa->spa_load_max_txg--; + + spa_activate(spa, mode); + spa_async_suspend(spa); + + return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig)); +} + +static int +spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig, + uint64_t max_request, int rewind_flags) +{ + nvlist_t *config = NULL; + int load_error, rewind_error; + uint64_t safe_rewind_txg; + uint64_t min_txg; + + if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { + spa->spa_load_max_txg = spa->spa_load_txg; + spa_set_log_state(spa, SPA_LOG_CLEAR); + } else { + spa->spa_load_max_txg = max_request; + } + + load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING, + mosconfig); + if (load_error == 0) + return (0); + + if (spa->spa_root_vdev != NULL) + config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); + + spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; + spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; + + if (rewind_flags & ZPOOL_NEVER_REWIND) { + nvlist_free(config); + return (load_error); + } + + /* Price of rolling back is discarding txgs, including log */ + if (state == SPA_LOAD_RECOVER) + spa_set_log_state(spa, SPA_LOG_CLEAR); + + spa->spa_load_max_txg = spa->spa_last_ubsync_txg; + safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; + min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? + TXG_INITIAL : safe_rewind_txg; + + /* + * Continue as long as we're finding errors, we're still within + * the acceptable rewind range, and we're still finding uberblocks + */ + while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && + spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { + if (spa->spa_load_max_txg < safe_rewind_txg) + spa->spa_extreme_rewind = B_TRUE; + rewind_error = spa_load_retry(spa, state, mosconfig); + } + + spa->spa_extreme_rewind = B_FALSE; + spa->spa_load_max_txg = UINT64_MAX; + + if (config && (rewind_error || state != SPA_LOAD_RECOVER)) + spa_config_set(spa, config); + + return (state == SPA_LOAD_RECOVER ? rewind_error : load_error); +} + +/* + * Pool Open/Import + * + * The import case is identical to an open except that the configuration is sent + * down from userland, instead of grabbed from the configuration cache. For the + * case of an open, the pool configuration will exist in the + * POOL_STATE_UNINITIALIZED state. + * + * The stats information (gen/count/ustats) is used to gather vdev statistics at + * the same time open the pool, without having to keep around the spa_t in some + * ambiguous state. + */ +static int +spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, + nvlist_t **config) +{ + spa_t *spa; + spa_load_state_t state = SPA_LOAD_OPEN; + int error; + int locked = B_FALSE; + + *spapp = NULL; + + /* + * As disgusting as this is, we need to support recursive calls to this + * function because dsl_dir_open() is called during spa_load(), and ends + * up calling spa_open() again. The real fix is to figure out how to + * avoid dsl_dir_open() calling this in the first place. + */ + if (mutex_owner(&spa_namespace_lock) != curthread) { + mutex_enter(&spa_namespace_lock); + locked = B_TRUE; + } + + if ((spa = spa_lookup(pool)) == NULL) { + if (locked) + mutex_exit(&spa_namespace_lock); + return (ENOENT); + } + + if (spa->spa_state == POOL_STATE_UNINITIALIZED) { + zpool_rewind_policy_t policy; + + zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config, + &policy); + if (policy.zrp_request & ZPOOL_DO_REWIND) + state = SPA_LOAD_RECOVER; + + spa_activate(spa, spa_mode_global); + + if (state != SPA_LOAD_RECOVER) + spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; + + error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg, + policy.zrp_request); + + if (error == EBADF) { + /* + * If vdev_validate() returns failure (indicated by + * EBADF), it indicates that one of the vdevs indicates + * that the pool has been exported or destroyed. If + * this is the case, the config cache is out of sync and + * we should remove the pool from the namespace. + */ + spa_unload(spa); + spa_deactivate(spa); + spa_config_sync(spa, B_TRUE, B_TRUE); + spa_remove(spa); + if (locked) + mutex_exit(&spa_namespace_lock); + return (ENOENT); + } + + if (error) { + /* + * We can't open the pool, but we still have useful + * information: the state of each vdev after the + * attempted vdev_open(). Return this to the user. + */ + if (config != NULL && spa->spa_config) { + VERIFY(nvlist_dup(spa->spa_config, config, + KM_SLEEP) == 0); + VERIFY(nvlist_add_nvlist(*config, + ZPOOL_CONFIG_LOAD_INFO, + spa->spa_load_info) == 0); + } + spa_unload(spa); + spa_deactivate(spa); + spa->spa_last_open_failed = error; + if (locked) + mutex_exit(&spa_namespace_lock); + *spapp = NULL; + return (error); + } + } + + spa_open_ref(spa, tag); + + if (config != NULL) + *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); + + /* + * If we've recovered the pool, pass back any information we + * gathered while doing the load. + */ + if (state == SPA_LOAD_RECOVER) { + VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, + spa->spa_load_info) == 0); + } + + if (locked) { + spa->spa_last_open_failed = 0; + spa->spa_last_ubsync_txg = 0; + spa->spa_load_txg = 0; + mutex_exit(&spa_namespace_lock); + } + + *spapp = spa; + + return (0); +} + +int +spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, + nvlist_t **config) +{ + return (spa_open_common(name, spapp, tag, policy, config)); +} + +int +spa_open(const char *name, spa_t **spapp, void *tag) +{ + return (spa_open_common(name, spapp, tag, NULL, NULL)); +} + +/* + * Lookup the given spa_t, incrementing the inject count in the process, + * preventing it from being exported or destroyed. + */ +spa_t * +spa_inject_addref(char *name) +{ + spa_t *spa; + + mutex_enter(&spa_namespace_lock); + if ((spa = spa_lookup(name)) == NULL) { + mutex_exit(&spa_namespace_lock); + return (NULL); + } + spa->spa_inject_ref++; + mutex_exit(&spa_namespace_lock); + + return (spa); +} + +void +spa_inject_delref(spa_t *spa) +{ + mutex_enter(&spa_namespace_lock); + spa->spa_inject_ref--; + mutex_exit(&spa_namespace_lock); +} + +/* + * Add spares device information to the nvlist. + */ +static void +spa_add_spares(spa_t *spa, nvlist_t *config) +{ + nvlist_t **spares; + uint_t i, nspares; + nvlist_t *nvroot; + uint64_t guid; + vdev_stat_t *vs; + uint_t vsc; + uint64_t pool; + + ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); + + if (spa->spa_spares.sav_count == 0) + return; + + VERIFY(nvlist_lookup_nvlist(config, + ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); + VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, + ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); + if (nspares != 0) { + VERIFY(nvlist_add_nvlist_array(nvroot, + ZPOOL_CONFIG_SPARES, spares, nspares) == 0); + VERIFY(nvlist_lookup_nvlist_array(nvroot, + ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); + + /* + * Go through and find any spares which have since been + * repurposed as an active spare. If this is the case, update + * their status appropriately. + */ + for (i = 0; i < nspares; i++) { + VERIFY(nvlist_lookup_uint64(spares[i], + ZPOOL_CONFIG_GUID, &guid) == 0); + if (spa_spare_exists(guid, &pool, NULL) && + pool != 0ULL) { + VERIFY(nvlist_lookup_uint64_array( + spares[i], ZPOOL_CONFIG_VDEV_STATS, + (uint64_t **)&vs, &vsc) == 0); + vs->vs_state = VDEV_STATE_CANT_OPEN; + vs->vs_aux = VDEV_AUX_SPARED; + } + } + } +} + +/* + * Add l2cache device information to the nvlist, including vdev stats. + */ +static void +spa_add_l2cache(spa_t *spa, nvlist_t *config) +{ + nvlist_t **l2cache; + uint_t i, j, nl2cache; + nvlist_t *nvroot; + uint64_t guid; + vdev_t *vd; + vdev_stat_t *vs; + uint_t vsc; + + ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); + + if (spa->spa_l2cache.sav_count == 0) + return; + + VERIFY(nvlist_lookup_nvlist(config, + ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); + VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, + ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); + if (nl2cache != 0) { + VERIFY(nvlist_add_nvlist_array(nvroot, + ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); + VERIFY(nvlist_lookup_nvlist_array(nvroot, + ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); + + /* + * Update level 2 cache device stats. + */ + + for (i = 0; i < nl2cache; i++) { + VERIFY(nvlist_lookup_uint64(l2cache[i], + ZPOOL_CONFIG_GUID, &guid) == 0); + + vd = NULL; + for (j = 0; j < spa->spa_l2cache.sav_count; j++) { + if (guid == + spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { + vd = spa->spa_l2cache.sav_vdevs[j]; + break; + } + } + ASSERT(vd != NULL); + + VERIFY(nvlist_lookup_uint64_array(l2cache[i], + ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) + == 0); + vdev_get_stats(vd, vs); + } + } +} + +int +spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen) +{ + int error; + spa_t *spa; + + *config = NULL; + error = spa_open_common(name, &spa, FTAG, NULL, config); + + if (spa != NULL) { + /* + * This still leaves a window of inconsistency where the spares + * or l2cache devices could change and the config would be + * self-inconsistent. + */ + spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); + + if (*config != NULL) { + uint64_t loadtimes[2]; + + loadtimes[0] = spa->spa_loaded_ts.tv_sec; + loadtimes[1] = spa->spa_loaded_ts.tv_nsec; + VERIFY(nvlist_add_uint64_array(*config, + ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); + + VERIFY(nvlist_add_uint64(*config, + ZPOOL_CONFIG_ERRCOUNT, + spa_get_errlog_size(spa)) == 0); + + if (spa_suspended(spa)) + VERIFY(nvlist_add_uint64(*config, + ZPOOL_CONFIG_SUSPENDED, + spa->spa_failmode) == 0); + + spa_add_spares(spa, *config); + spa_add_l2cache(spa, *config); + } + } + + /* + * We want to get the alternate root even for faulted pools, so we cheat + * and call spa_lookup() directly. + */ + if (altroot) { + if (spa == NULL) { + mutex_enter(&spa_namespace_lock); + spa = spa_lookup(name); + if (spa) + spa_altroot(spa, altroot, buflen); + else + altroot[0] = '\0'; + spa = NULL; + mutex_exit(&spa_namespace_lock); + } else { + spa_altroot(spa, altroot, buflen); + } + } + + if (spa != NULL) { + spa_config_exit(spa, SCL_CONFIG, FTAG); + spa_close(spa, FTAG); + } + + return (error); +} + +/* + * Validate that the auxiliary device array is well formed. We must have an + * array of nvlists, each which describes a valid leaf vdev. If this is an + * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be + * specified, as long as they are well-formed. + */ +static int +spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, + spa_aux_vdev_t *sav, const char *config, uint64_t version, + vdev_labeltype_t label) +{ + nvlist_t **dev; + uint_t i, ndev; + vdev_t *vd; + int error; + + ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); + + /* + * It's acceptable to have no devs specified. + */ + if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) + return (0); + + if (ndev == 0) + return (EINVAL); + + /* + * Make sure the pool is formatted with a version that supports this + * device type. + */ + if (spa_version(spa) < version) + return (ENOTSUP); + + /* + * Set the pending device list so we correctly handle device in-use + * checking. + */ + sav->sav_pending = dev; + sav->sav_npending = ndev; + + for (i = 0; i < ndev; i++) { + if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, + mode)) != 0) + goto out; + + if (!vd->vdev_ops->vdev_op_leaf) { + vdev_free(vd); + error = EINVAL; + goto out; + } + + /* + * The L2ARC currently only supports disk devices in + * kernel context. For user-level testing, we allow it. + */ +#ifdef _KERNEL + if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) && + strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) { + error = ENOTBLK; + goto out; + } +#endif + vd->vdev_top = vd; + + if ((error = vdev_open(vd)) == 0 && + (error = vdev_label_init(vd, crtxg, label)) == 0) { + VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, + vd->vdev_guid) == 0); + } + + vdev_free(vd); + + if (error && + (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) + goto out; + else + error = 0; + } + +out: + sav->sav_pending = NULL; + sav->sav_npending = 0; + return (error); +} + +static int +spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) +{ + int error; + + ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); + + if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, + &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, + VDEV_LABEL_SPARE)) != 0) { + return (error); + } + + return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, + &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, + VDEV_LABEL_L2CACHE)); +} + +static void +spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, + const char *config) +{ + int i; + + if (sav->sav_config != NULL) { + nvlist_t **olddevs; + uint_t oldndevs; + nvlist_t **newdevs; + + /* + * Generate new dev list by concatentating with the + * current dev list. + */ + VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, + &olddevs, &oldndevs) == 0); + + newdevs = kmem_alloc(sizeof (void *) * + (ndevs + oldndevs), KM_SLEEP); + for (i = 0; i < oldndevs; i++) + VERIFY(nvlist_dup(olddevs[i], &newdevs[i], + KM_SLEEP) == 0); + for (i = 0; i < ndevs; i++) + VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], + KM_SLEEP) == 0); + + VERIFY(nvlist_remove(sav->sav_config, config, + DATA_TYPE_NVLIST_ARRAY) == 0); + + VERIFY(nvlist_add_nvlist_array(sav->sav_config, + config, newdevs, ndevs + oldndevs) == 0); + for (i = 0; i < oldndevs + ndevs; i++) + nvlist_free(newdevs[i]); + kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); + } else { + /* + * Generate a new dev list. + */ + VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, + KM_SLEEP) == 0); + VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, + devs, ndevs) == 0); + } +} + +/* + * Stop and drop level 2 ARC devices + */ +void +spa_l2cache_drop(spa_t *spa) +{ + vdev_t *vd; + int i; + spa_aux_vdev_t *sav = &spa->spa_l2cache; + + for (i = 0; i < sav->sav_count; i++) { + uint64_t pool; + + vd = sav->sav_vdevs[i]; + ASSERT(vd != NULL); + + if (spa_l2cache_exists(vd->vdev_guid, &pool) && + pool != 0ULL && l2arc_vdev_present(vd)) + l2arc_remove_vdev(vd); + if (vd->vdev_isl2cache) + spa_l2cache_remove(vd); + vdev_clear_stats(vd); + (void) vdev_close(vd); + } +} + +/* + * Pool Creation + */ +int +spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, + const char *history_str, nvlist_t *zplprops) +{ + spa_t *spa; + char *altroot = NULL; + vdev_t *rvd; + dsl_pool_t *dp; + dmu_tx_t *tx; + int error = 0; + uint64_t txg = TXG_INITIAL; + nvlist_t **spares, **l2cache; + uint_t nspares, nl2cache; + uint64_t version, obj; + + /* + * If this pool already exists, return failure. + */ + mutex_enter(&spa_namespace_lock); + if (spa_lookup(pool) != NULL) { + mutex_exit(&spa_namespace_lock); + return (EEXIST); + } + + /* + * Allocate a new spa_t structure. + */ + (void) nvlist_lookup_string(props, + zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); + spa = spa_add(pool, NULL, altroot); + spa_activate(spa, spa_mode_global); + + if (props && (error = spa_prop_validate(spa, props))) { + spa_deactivate(spa); + spa_remove(spa); + mutex_exit(&spa_namespace_lock); + return (error); + } + + if (nvlist_lookup_uint64(props, zpool_prop_to_name(ZPOOL_PROP_VERSION), + &version) != 0) + version = SPA_VERSION; + ASSERT(version <= SPA_VERSION); + + spa->spa_first_txg = txg; + spa->spa_uberblock.ub_txg = txg - 1; + spa->spa_uberblock.ub_version = version; + spa->spa_ubsync = spa->spa_uberblock; + + /* + * Create "The Godfather" zio to hold all async IOs + */ + spa->spa_async_zio_root = zio_root(spa, NULL, NULL, + ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); + + /* + * Create the root vdev. + */ + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + + error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); + + ASSERT(error != 0 || rvd != NULL); + ASSERT(error != 0 || spa->spa_root_vdev == rvd); + + if (error == 0 && !zfs_allocatable_devs(nvroot)) + error = EINVAL; + + if (error == 0 && + (error = vdev_create(rvd, txg, B_FALSE)) == 0 && + (error = spa_validate_aux(spa, nvroot, txg, + VDEV_ALLOC_ADD)) == 0) { + for (int c = 0; c < rvd->vdev_children; c++) { + vdev_metaslab_set_size(rvd->vdev_child[c]); + vdev_expand(rvd->vdev_child[c], txg); + } + } + + spa_config_exit(spa, SCL_ALL, FTAG); + + if (error != 0) { + spa_unload(spa); + spa_deactivate(spa); + spa_remove(spa); + mutex_exit(&spa_namespace_lock); + return (error); + } + + /* + * Get the list of spares, if specified. + */ + if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, + &spares, &nspares) == 0) { + VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, + KM_SLEEP) == 0); + VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, + ZPOOL_CONFIG_SPARES, spares, nspares) == 0); + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + spa_load_spares(spa); + spa_config_exit(spa, SCL_ALL, FTAG); + spa->spa_spares.sav_sync = B_TRUE; + } + + /* + * Get the list of level 2 cache devices, if specified. + */ + if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, + &l2cache, &nl2cache) == 0) { + VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, + NV_UNIQUE_NAME, KM_SLEEP) == 0); + VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, + ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + spa_load_l2cache(spa); + spa_config_exit(spa, SCL_ALL, FTAG); + spa->spa_l2cache.sav_sync = B_TRUE; + } + + spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg); + spa->spa_meta_objset = dp->dp_meta_objset; + + /* + * Create DDTs (dedup tables). + */ + ddt_create(spa); + + spa_update_dspace(spa); + + tx = dmu_tx_create_assigned(dp, txg); + + /* + * Create the pool config object. + */ + spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, + DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, + DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); + + if (zap_add(spa->spa_meta_objset, + DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, + sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { + cmn_err(CE_PANIC, "failed to add pool config"); + } + + if (zap_add(spa->spa_meta_objset, + DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, + sizeof (uint64_t), 1, &version, tx) != 0) { + cmn_err(CE_PANIC, "failed to add pool version"); + } + + /* Newly created pools with the right version are always deflated. */ + if (version >= SPA_VERSION_RAIDZ_DEFLATE) { + spa->spa_deflate = TRUE; + if (zap_add(spa->spa_meta_objset, + DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, + sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { + cmn_err(CE_PANIC, "failed to add deflate"); + } + } + + /* + * Create the deferred-free bpobj. Turn off compression + * because sync-to-convergence takes longer if the blocksize + * keeps changing. + */ + obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); + dmu_object_set_compress(spa->spa_meta_objset, obj, + ZIO_COMPRESS_OFF, tx); + if (zap_add(spa->spa_meta_objset, + DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, + sizeof (uint64_t), 1, &obj, tx) != 0) { + cmn_err(CE_PANIC, "failed to add bpobj"); + } + VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, + spa->spa_meta_objset, obj)); + + /* + * Create the pool's history object. + */ + if (version >= SPA_VERSION_ZPOOL_HISTORY) + spa_history_create_obj(spa, tx); + + /* + * Set pool properties. + */ + spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); + spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); + spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); + spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); + + if (props != NULL) { + spa_configfile_set(spa, props, B_FALSE); + spa_sync_props(spa, props, tx); + } + + dmu_tx_commit(tx); + + spa->spa_sync_on = B_TRUE; + txg_sync_start(spa->spa_dsl_pool); + + /* + * We explicitly wait for the first transaction to complete so that our + * bean counters are appropriately updated. + */ + txg_wait_synced(spa->spa_dsl_pool, txg); + + spa_config_sync(spa, B_FALSE, B_TRUE); + + if (version >= SPA_VERSION_ZPOOL_HISTORY && history_str != NULL) + (void) spa_history_log(spa, history_str, LOG_CMD_POOL_CREATE); + spa_history_log_version(spa, LOG_POOL_CREATE); + + spa->spa_minref = refcount_count(&spa->spa_refcount); + + mutex_exit(&spa_namespace_lock); + + return (0); +} + +#ifdef _KERNEL +/* + * Get the root pool information from the root disk, then import the root pool + * during the system boot up time. + */ +extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **); + +static nvlist_t * +spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid) +{ + nvlist_t *config; + nvlist_t *nvtop, *nvroot; + uint64_t pgid; + + if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) + return (NULL); + + /* + * Add this top-level vdev to the child array. + */ + VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, + &nvtop) == 0); + VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, + &pgid) == 0); + VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); + + /* + * Put this pool's top-level vdevs into a root vdev. + */ + VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); + VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, + VDEV_TYPE_ROOT) == 0); + VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); + VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); + VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, + &nvtop, 1) == 0); + + /* + * Replace the existing vdev_tree with the new root vdev in + * this pool's configuration (remove the old, add the new). + */ + VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); + nvlist_free(nvroot); + return (config); +} + +/* + * Walk the vdev tree and see if we can find a device with "better" + * configuration. A configuration is "better" if the label on that + * device has a more recent txg. + */ +static void +spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) +{ + for (int c = 0; c < vd->vdev_children; c++) + spa_alt_rootvdev(vd->vdev_child[c], avd, txg); + + if (vd->vdev_ops->vdev_op_leaf) { + nvlist_t *label; + uint64_t label_txg; + + if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, + &label) != 0) + return; + + VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, + &label_txg) == 0); + + /* + * Do we have a better boot device? + */ + if (label_txg > *txg) { + *txg = label_txg; + *avd = vd; + } + nvlist_free(label); + } +} + +/* + * Import a root pool. + * + * For x86. devpath_list will consist of devid and/or physpath name of + * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). + * The GRUB "findroot" command will return the vdev we should boot. + * + * For Sparc, devpath_list consists the physpath name of the booting device + * no matter the rootpool is a single device pool or a mirrored pool. + * e.g. + * "/pci@1f,0/ide@d/disk@0,0:a" + */ +int +spa_import_rootpool(char *devpath, char *devid) +{ + spa_t *spa; + vdev_t *rvd, *bvd, *avd = NULL; + nvlist_t *config, *nvtop; + uint64_t guid, txg; + char *pname; + int error; + + /* + * Read the label from the boot device and generate a configuration. + */ + config = spa_generate_rootconf(devpath, devid, &guid); +#if defined(_OBP) && defined(_KERNEL) + if (config == NULL) { + if (strstr(devpath, "/iscsi/ssd") != NULL) { + /* iscsi boot */ + get_iscsi_bootpath_phy(devpath); + config = spa_generate_rootconf(devpath, devid, &guid); + } + } +#endif + if (config == NULL) { + cmn_err(CE_NOTE, "Can not read the pool label from '%s'", + devpath); + return (EIO); + } + + VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, + &pname) == 0); + VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); + + mutex_enter(&spa_namespace_lock); + if ((spa = spa_lookup(pname)) != NULL) { + /* + * Remove the existing root pool from the namespace so that we + * can replace it with the correct config we just read in. + */ + spa_remove(spa); + } + + spa = spa_add(pname, config, NULL); + spa->spa_is_root = B_TRUE; + spa->spa_import_flags = ZFS_IMPORT_VERBATIM; + + /* + * Build up a vdev tree based on the boot device's label config. + */ + VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, + &nvtop) == 0); + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, + VDEV_ALLOC_ROOTPOOL); + spa_config_exit(spa, SCL_ALL, FTAG); + if (error) { + mutex_exit(&spa_namespace_lock); + nvlist_free(config); + cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", + pname); + return (error); + } + + /* + * Get the boot vdev. + */ + if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { + cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", + (u_longlong_t)guid); + error = ENOENT; + goto out; + } + + /* + * Determine if there is a better boot device. + */ + avd = bvd; + spa_alt_rootvdev(rvd, &avd, &txg); + if (avd != bvd) { + cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " + "try booting from '%s'", avd->vdev_path); + error = EINVAL; + goto out; + } + + /* + * If the boot device is part of a spare vdev then ensure that + * we're booting off the active spare. + */ + if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && + !bvd->vdev_isspare) { + cmn_err(CE_NOTE, "The boot device is currently spared. Please " + "try booting from '%s'", + bvd->vdev_parent-> + vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); + error = EINVAL; + goto out; + } + + error = 0; + spa_history_log_version(spa, LOG_POOL_IMPORT); +out: + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + vdev_free(rvd); + spa_config_exit(spa, SCL_ALL, FTAG); + mutex_exit(&spa_namespace_lock); + + nvlist_free(config); + return (error); +} + +#endif + +/* + * Import a non-root pool into the system. + */ +int +spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) +{ + spa_t *spa; + char *altroot = NULL; + spa_load_state_t state = SPA_LOAD_IMPORT; + zpool_rewind_policy_t policy; + uint64_t mode = spa_mode_global; + uint64_t readonly = B_FALSE; + int error; + nvlist_t *nvroot; + nvlist_t **spares, **l2cache; + uint_t nspares, nl2cache; + + /* + * If a pool with this name exists, return failure. + */ + mutex_enter(&spa_namespace_lock); + if (spa_lookup(pool) != NULL) { + mutex_exit(&spa_namespace_lock); + return (EEXIST); + } + + /* + * Create and initialize the spa structure. + */ + (void) nvlist_lookup_string(props, + zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); + (void) nvlist_lookup_uint64(props, + zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); + if (readonly) + mode = FREAD; + spa = spa_add(pool, config, altroot); + spa->spa_import_flags = flags; + + /* + * Verbatim import - Take a pool and insert it into the namespace + * as if it had been loaded at boot. + */ + if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { + if (props != NULL) + spa_configfile_set(spa, props, B_FALSE); + + spa_config_sync(spa, B_FALSE, B_TRUE); + + mutex_exit(&spa_namespace_lock); + spa_history_log_version(spa, LOG_POOL_IMPORT); + + return (0); + } + + spa_activate(spa, mode); + + /* + * Don't start async tasks until we know everything is healthy. + */ + spa_async_suspend(spa); + + zpool_get_rewind_policy(config, &policy); + if (policy.zrp_request & ZPOOL_DO_REWIND) + state = SPA_LOAD_RECOVER; + + /* + * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig + * because the user-supplied config is actually the one to trust when + * doing an import. + */ + if (state != SPA_LOAD_RECOVER) + spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; + + error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg, + policy.zrp_request); + + /* + * Propagate anything learned while loading the pool and pass it + * back to caller (i.e. rewind info, missing devices, etc). + */ + VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, + spa->spa_load_info) == 0); + + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + /* + * Toss any existing sparelist, as it doesn't have any validity + * anymore, and conflicts with spa_has_spare(). + */ + if (spa->spa_spares.sav_config) { + nvlist_free(spa->spa_spares.sav_config); + spa->spa_spares.sav_config = NULL; + spa_load_spares(spa); + } + if (spa->spa_l2cache.sav_config) { + nvlist_free(spa->spa_l2cache.sav_config); + spa->spa_l2cache.sav_config = NULL; + spa_load_l2cache(spa); + } + + VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, + &nvroot) == 0); + if (error == 0) + error = spa_validate_aux(spa, nvroot, -1ULL, + VDEV_ALLOC_SPARE); + if (error == 0) + error = spa_validate_aux(spa, nvroot, -1ULL, + VDEV_ALLOC_L2CACHE); + spa_config_exit(spa, SCL_ALL, FTAG); + + if (props != NULL) + spa_configfile_set(spa, props, B_FALSE); + + if (error != 0 || (props && spa_writeable(spa) && + (error = spa_prop_set(spa, props)))) { + spa_unload(spa); + spa_deactivate(spa); + spa_remove(spa); + mutex_exit(&spa_namespace_lock); + return (error); + } + + spa_async_resume(spa); + + /* + * Override any spares and level 2 cache devices as specified by + * the user, as these may have correct device names/devids, etc. + */ + if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, + &spares, &nspares) == 0) { + if (spa->spa_spares.sav_config) + VERIFY(nvlist_remove(spa->spa_spares.sav_config, + ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); + else + VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, + NV_UNIQUE_NAME, KM_SLEEP) == 0); + VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, + ZPOOL_CONFIG_SPARES, spares, nspares) == 0); + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + spa_load_spares(spa); + spa_config_exit(spa, SCL_ALL, FTAG); + spa->spa_spares.sav_sync = B_TRUE; + } + if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, + &l2cache, &nl2cache) == 0) { + if (spa->spa_l2cache.sav_config) + VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, + ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); + else + VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, + NV_UNIQUE_NAME, KM_SLEEP) == 0); + VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, + ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + spa_load_l2cache(spa); + spa_config_exit(spa, SCL_ALL, FTAG); + spa->spa_l2cache.sav_sync = B_TRUE; + } + + /* + * Check for any removed devices. + */ + if (spa->spa_autoreplace) { + spa_aux_check_removed(&spa->spa_spares); + spa_aux_check_removed(&spa->spa_l2cache); + } + + if (spa_writeable(spa)) { + /* + * Update the config cache to include the newly-imported pool. + */ + spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); + } + + /* + * It's possible that the pool was expanded while it was exported. + * We kick off an async task to handle this for us. + */ + spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); + + mutex_exit(&spa_namespace_lock); + spa_history_log_version(spa, LOG_POOL_IMPORT); + + return (0); +} + +nvlist_t * +spa_tryimport(nvlist_t *tryconfig) +{ + nvlist_t *config = NULL; + char *poolname; + spa_t *spa; + uint64_t state; + int error; + + if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) + return (NULL); + + if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) + return (NULL); + + /* + * Create and initialize the spa structure. + */ + mutex_enter(&spa_namespace_lock); + spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); + spa_activate(spa, FREAD); + + /* + * Pass off the heavy lifting to spa_load(). + * Pass TRUE for mosconfig because the user-supplied config + * is actually the one to trust when doing an import. + */ + error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE); + + /* + * If 'tryconfig' was at least parsable, return the current config. + */ + if (spa->spa_root_vdev != NULL) { + config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); + VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, + poolname) == 0); + VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, + state) == 0); + VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, + spa->spa_uberblock.ub_timestamp) == 0); + + /* + * If the bootfs property exists on this pool then we + * copy it out so that external consumers can tell which + * pools are bootable. + */ + if ((!error || error == EEXIST) && spa->spa_bootfs) { + char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); + + /* + * We have to play games with the name since the + * pool was opened as TRYIMPORT_NAME. + */ + if (dsl_dsobj_to_dsname(spa_name(spa), + spa->spa_bootfs, tmpname) == 0) { + char *cp; + char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); + + cp = strchr(tmpname, '/'); + if (cp == NULL) { + (void) strlcpy(dsname, tmpname, + MAXPATHLEN); + } else { + (void) snprintf(dsname, MAXPATHLEN, + "%s/%s", poolname, ++cp); + } + VERIFY(nvlist_add_string(config, + ZPOOL_CONFIG_BOOTFS, dsname) == 0); + kmem_free(dsname, MAXPATHLEN); + } + kmem_free(tmpname, MAXPATHLEN); + } + + /* + * Add the list of hot spares and level 2 cache devices. + */ + spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); + spa_add_spares(spa, config); + spa_add_l2cache(spa, config); + spa_config_exit(spa, SCL_CONFIG, FTAG); + } + + spa_unload(spa); + spa_deactivate(spa); + spa_remove(spa); + mutex_exit(&spa_namespace_lock); + + return (config); +} + +/* + * Pool export/destroy + * + * The act of destroying or exporting a pool is very simple. We make sure there + * is no more pending I/O and any references to the pool are gone. Then, we + * update the pool state and sync all the labels to disk, removing the + * configuration from the cache afterwards. If the 'hardforce' flag is set, then + * we don't sync the labels or remove the configuration cache. + */ +static int +spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, + boolean_t force, boolean_t hardforce) +{ + spa_t *spa; + + if (oldconfig) + *oldconfig = NULL; + + if (!(spa_mode_global & FWRITE)) + return (EROFS); + + mutex_enter(&spa_namespace_lock); + if ((spa = spa_lookup(pool)) == NULL) { + mutex_exit(&spa_namespace_lock); + return (ENOENT); + } + + /* + * Put a hold on the pool, drop the namespace lock, stop async tasks, + * reacquire the namespace lock, and see if we can export. + */ + spa_open_ref(spa, FTAG); + mutex_exit(&spa_namespace_lock); + spa_async_suspend(spa); + mutex_enter(&spa_namespace_lock); + spa_close(spa, FTAG); + + /* + * The pool will be in core if it's openable, + * in which case we can modify its state. + */ + if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { + /* + * Objsets may be open only because they're dirty, so we + * have to force it to sync before checking spa_refcnt. + */ + txg_wait_synced(spa->spa_dsl_pool, 0); + + /* + * A pool cannot be exported or destroyed if there are active + * references. If we are resetting a pool, allow references by + * fault injection handlers. + */ + if (!spa_refcount_zero(spa) || + (spa->spa_inject_ref != 0 && + new_state != POOL_STATE_UNINITIALIZED)) { + spa_async_resume(spa); + mutex_exit(&spa_namespace_lock); + return (EBUSY); + } + + /* + * A pool cannot be exported if it has an active shared spare. + * This is to prevent other pools stealing the active spare + * from an exported pool. At user's own will, such pool can + * be forcedly exported. + */ + if (!force && new_state == POOL_STATE_EXPORTED && + spa_has_active_shared_spare(spa)) { + spa_async_resume(spa); + mutex_exit(&spa_namespace_lock); + return (EXDEV); + } + + /* + * We want this to be reflected on every label, + * so mark them all dirty. spa_unload() will do the + * final sync that pushes these changes out. + */ + if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + spa->spa_state = new_state; + spa->spa_final_txg = spa_last_synced_txg(spa) + + TXG_DEFER_SIZE + 1; + vdev_config_dirty(spa->spa_root_vdev); + spa_config_exit(spa, SCL_ALL, FTAG); + } + } + + spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY); + + if (spa->spa_state != POOL_STATE_UNINITIALIZED) { + spa_unload(spa); + spa_deactivate(spa); + } + + if (oldconfig && spa->spa_config) + VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); + + if (new_state != POOL_STATE_UNINITIALIZED) { + if (!hardforce) + spa_config_sync(spa, B_TRUE, B_TRUE); + spa_remove(spa); + } + mutex_exit(&spa_namespace_lock); + + return (0); +} + +/* + * Destroy a storage pool. + */ +int +spa_destroy(char *pool) +{ + return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, + B_FALSE, B_FALSE)); +} + +/* + * Export a storage pool. + */ +int +spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, + boolean_t hardforce) +{ + return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, + force, hardforce)); +} + +/* + * Similar to spa_export(), this unloads the spa_t without actually removing it + * from the namespace in any way. + */ +int +spa_reset(char *pool) +{ + return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, + B_FALSE, B_FALSE)); +} + +/* + * ========================================================================== + * Device manipulation + * ========================================================================== + */ + +/* + * Add a device to a storage pool. + */ +int +spa_vdev_add(spa_t *spa, nvlist_t *nvroot) +{ + uint64_t txg, id; + int error; + vdev_t *rvd = spa->spa_root_vdev; + vdev_t *vd, *tvd; + nvlist_t **spares, **l2cache; + uint_t nspares, nl2cache; + + ASSERT(spa_writeable(spa)); + + txg = spa_vdev_enter(spa); + + if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, + VDEV_ALLOC_ADD)) != 0) + return (spa_vdev_exit(spa, NULL, txg, error)); + + spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ + + if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, + &nspares) != 0) + nspares = 0; + + if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, + &nl2cache) != 0) + nl2cache = 0; + + if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) + return (spa_vdev_exit(spa, vd, txg, EINVAL)); + + if (vd->vdev_children != 0 && + (error = vdev_create(vd, txg, B_FALSE)) != 0) + return (spa_vdev_exit(spa, vd, txg, error)); + + /* + * We must validate the spares and l2cache devices after checking the + * children. Otherwise, vdev_inuse() will blindly overwrite the spare. + */ + if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) + return (spa_vdev_exit(spa, vd, txg, error)); + + /* + * Transfer each new top-level vdev from vd to rvd. + */ + for (int c = 0; c < vd->vdev_children; c++) { + + /* + * Set the vdev id to the first hole, if one exists. + */ + for (id = 0; id < rvd->vdev_children; id++) { + if (rvd->vdev_child[id]->vdev_ishole) { + vdev_free(rvd->vdev_child[id]); + break; + } + } + tvd = vd->vdev_child[c]; + vdev_remove_child(vd, tvd); + tvd->vdev_id = id; + vdev_add_child(rvd, tvd); + vdev_config_dirty(tvd); + } + + if (nspares != 0) { + spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, + ZPOOL_CONFIG_SPARES); + spa_load_spares(spa); + spa->spa_spares.sav_sync = B_TRUE; + } + + if (nl2cache != 0) { + spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, + ZPOOL_CONFIG_L2CACHE); + spa_load_l2cache(spa); + spa->spa_l2cache.sav_sync = B_TRUE; + } + + /* + * We have to be careful when adding new vdevs to an existing pool. + * If other threads start allocating from these vdevs before we + * sync the config cache, and we lose power, then upon reboot we may + * fail to open the pool because there are DVAs that the config cache + * can't translate. Therefore, we first add the vdevs without + * initializing metaslabs; sync the config cache (via spa_vdev_exit()); + * and then let spa_config_update() initialize the new metaslabs. + * + * spa_load() checks for added-but-not-initialized vdevs, so that + * if we lose power at any point in this sequence, the remaining + * steps will be completed the next time we load the pool. + */ + (void) spa_vdev_exit(spa, vd, txg, 0); + + mutex_enter(&spa_namespace_lock); + spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); + mutex_exit(&spa_namespace_lock); + + return (0); +} + +/* + * Attach a device to a mirror. The arguments are the path to any device + * in the mirror, and the nvroot for the new device. If the path specifies + * a device that is not mirrored, we automatically insert the mirror vdev. + * + * If 'replacing' is specified, the new device is intended to replace the + * existing device; in this case the two devices are made into their own + * mirror using the 'replacing' vdev, which is functionally identical to + * the mirror vdev (it actually reuses all the same ops) but has a few + * extra rules: you can't attach to it after it's been created, and upon + * completion of resilvering, the first disk (the one being replaced) + * is automatically detached. + */ +int +spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) +{ + uint64_t txg, dtl_max_txg; + vdev_t *rvd = spa->spa_root_vdev; + vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; + vdev_ops_t *pvops; + char *oldvdpath, *newvdpath; + int newvd_isspare; + int error; + + ASSERT(spa_writeable(spa)); + + txg = spa_vdev_enter(spa); + + oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); + + if (oldvd == NULL) + return (spa_vdev_exit(spa, NULL, txg, ENODEV)); + + if (!oldvd->vdev_ops->vdev_op_leaf) + return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); + + pvd = oldvd->vdev_parent; + + if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, + VDEV_ALLOC_ADD)) != 0) + return (spa_vdev_exit(spa, NULL, txg, EINVAL)); + + if (newrootvd->vdev_children != 1) + return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); + + newvd = newrootvd->vdev_child[0]; + + if (!newvd->vdev_ops->vdev_op_leaf) + return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); + + if ((error = vdev_create(newrootvd, txg, replacing)) != 0) + return (spa_vdev_exit(spa, newrootvd, txg, error)); + + /* + * Spares can't replace logs + */ + if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) + return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); + + if (!replacing) { + /* + * For attach, the only allowable parent is a mirror or the root + * vdev. + */ + if (pvd->vdev_ops != &vdev_mirror_ops && + pvd->vdev_ops != &vdev_root_ops) + return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); + + pvops = &vdev_mirror_ops; + } else { + /* + * Active hot spares can only be replaced by inactive hot + * spares. + */ + if (pvd->vdev_ops == &vdev_spare_ops && + oldvd->vdev_isspare && + !spa_has_spare(spa, newvd->vdev_guid)) + return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); + + /* + * If the source is a hot spare, and the parent isn't already a + * spare, then we want to create a new hot spare. Otherwise, we + * want to create a replacing vdev. The user is not allowed to + * attach to a spared vdev child unless the 'isspare' state is + * the same (spare replaces spare, non-spare replaces + * non-spare). + */ + if (pvd->vdev_ops == &vdev_replacing_ops && + spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { + return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); + } else if (pvd->vdev_ops == &vdev_spare_ops && + newvd->vdev_isspare != oldvd->vdev_isspare) { + return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); + } + + if (newvd->vdev_isspare) + pvops = &vdev_spare_ops; + else + pvops = &vdev_replacing_ops; + } + + /* + * Make sure the new device is big enough. + */ + if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) + return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); + + /* + * The new device cannot have a higher alignment requirement + * than the top-level vdev. + */ + if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) + return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); + + /* + * If this is an in-place replacement, update oldvd's path and devid + * to make it distinguishable from newvd, and unopenable from now on. + */ + if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { + spa_strfree(oldvd->vdev_path); + oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, + KM_SLEEP); + (void) sprintf(oldvd->vdev_path, "%s/%s", + newvd->vdev_path, "old"); + if (oldvd->vdev_devid != NULL) { + spa_strfree(oldvd->vdev_devid); + oldvd->vdev_devid = NULL; + } + } + + /* mark the device being resilvered */ + newvd->vdev_resilvering = B_TRUE; + + /* + * If the parent is not a mirror, or if we're replacing, insert the new + * mirror/replacing/spare vdev above oldvd. + */ + if (pvd->vdev_ops != pvops) + pvd = vdev_add_parent(oldvd, pvops); + + ASSERT(pvd->vdev_top->vdev_parent == rvd); + ASSERT(pvd->vdev_ops == pvops); + ASSERT(oldvd->vdev_parent == pvd); + + /* + * Extract the new device from its root and add it to pvd. + */ + vdev_remove_child(newrootvd, newvd); + newvd->vdev_id = pvd->vdev_children; + newvd->vdev_crtxg = oldvd->vdev_crtxg; + vdev_add_child(pvd, newvd); + + tvd = newvd->vdev_top; + ASSERT(pvd->vdev_top == tvd); + ASSERT(tvd->vdev_parent == rvd); + + vdev_config_dirty(tvd); + + /* + * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account + * for any dmu_sync-ed blocks. It will propagate upward when + * spa_vdev_exit() calls vdev_dtl_reassess(). + */ + dtl_max_txg = txg + TXG_CONCURRENT_STATES; + + vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, + dtl_max_txg - TXG_INITIAL); + + if (newvd->vdev_isspare) { + spa_spare_activate(newvd); + spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE); + } + + oldvdpath = spa_strdup(oldvd->vdev_path); + newvdpath = spa_strdup(newvd->vdev_path); + newvd_isspare = newvd->vdev_isspare; + + /* + * Mark newvd's DTL dirty in this txg. + */ + vdev_dirty(tvd, VDD_DTL, newvd, txg); + + /* + * Restart the resilver + */ + dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); + + /* + * Commit the config + */ + (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); + + spa_history_log_internal(LOG_POOL_VDEV_ATTACH, spa, NULL, + "%s vdev=%s %s vdev=%s", + replacing && newvd_isspare ? "spare in" : + replacing ? "replace" : "attach", newvdpath, + replacing ? "for" : "to", oldvdpath); + + spa_strfree(oldvdpath); + spa_strfree(newvdpath); + + if (spa->spa_bootfs) + spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH); + + return (0); +} + +/* + * Detach a device from a mirror or replacing vdev. + * If 'replace_done' is specified, only detach if the parent + * is a replacing vdev. + */ +int +spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) +{ + uint64_t txg; + int error; + vdev_t *rvd = spa->spa_root_vdev; + vdev_t *vd, *pvd, *cvd, *tvd; + boolean_t unspare = B_FALSE; + uint64_t unspare_guid; + char *vdpath; + + ASSERT(spa_writeable(spa)); + + txg = spa_vdev_enter(spa); + + vd = spa_lookup_by_guid(spa, guid, B_FALSE); + + if (vd == NULL) + return (spa_vdev_exit(spa, NULL, txg, ENODEV)); + + if (!vd->vdev_ops->vdev_op_leaf) + return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); + + pvd = vd->vdev_parent; + + /* + * If the parent/child relationship is not as expected, don't do it. + * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing + * vdev that's replacing B with C. The user's intent in replacing + * is to go from M(A,B) to M(A,C). If the user decides to cancel + * the replace by detaching C, the expected behavior is to end up + * M(A,B). But suppose that right after deciding to detach C, + * the replacement of B completes. We would have M(A,C), and then + * ask to detach C, which would leave us with just A -- not what + * the user wanted. To prevent this, we make sure that the + * parent/child relationship hasn't changed -- in this example, + * that C's parent is still the replacing vdev R. + */ + if (pvd->vdev_guid != pguid && pguid != 0) + return (spa_vdev_exit(spa, NULL, txg, EBUSY)); + + /* + * Only 'replacing' or 'spare' vdevs can be replaced. + */ + if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && + pvd->vdev_ops != &vdev_spare_ops) + return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); + + ASSERT(pvd->vdev_ops != &vdev_spare_ops || + spa_version(spa) >= SPA_VERSION_SPARES); + + /* + * Only mirror, replacing, and spare vdevs support detach. + */ + if (pvd->vdev_ops != &vdev_replacing_ops && + pvd->vdev_ops != &vdev_mirror_ops && + pvd->vdev_ops != &vdev_spare_ops) + return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); + + /* + * If this device has the only valid copy of some data, + * we cannot safely detach it. + */ + if (vdev_dtl_required(vd)) + return (spa_vdev_exit(spa, NULL, txg, EBUSY)); + + ASSERT(pvd->vdev_children >= 2); + + /* + * If we are detaching the second disk from a replacing vdev, then + * check to see if we changed the original vdev's path to have "/old" + * at the end in spa_vdev_attach(). If so, undo that change now. + */ + if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && + vd->vdev_path != NULL) { + size_t len = strlen(vd->vdev_path); + + for (int c = 0; c < pvd->vdev_children; c++) { + cvd = pvd->vdev_child[c]; + + if (cvd == vd || cvd->vdev_path == NULL) + continue; + + if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && + strcmp(cvd->vdev_path + len, "/old") == 0) { + spa_strfree(cvd->vdev_path); + cvd->vdev_path = spa_strdup(vd->vdev_path); + break; + } + } + } + + /* + * If we are detaching the original disk from a spare, then it implies + * that the spare should become a real disk, and be removed from the + * active spare list for the pool. + */ + if (pvd->vdev_ops == &vdev_spare_ops && + vd->vdev_id == 0 && + pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) + unspare = B_TRUE; + + /* + * Erase the disk labels so the disk can be used for other things. + * This must be done after all other error cases are handled, + * but before we disembowel vd (so we can still do I/O to it). + * But if we can't do it, don't treat the error as fatal -- + * it may be that the unwritability of the disk is the reason + * it's being detached! + */ + error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); + + /* + * Remove vd from its parent and compact the parent's children. + */ + vdev_remove_child(pvd, vd); + vdev_compact_children(pvd); + + /* + * Remember one of the remaining children so we can get tvd below. + */ + cvd = pvd->vdev_child[pvd->vdev_children - 1]; + + /* + * If we need to remove the remaining child from the list of hot spares, + * do it now, marking the vdev as no longer a spare in the process. + * We must do this before vdev_remove_parent(), because that can + * change the GUID if it creates a new toplevel GUID. For a similar + * reason, we must remove the spare now, in the same txg as the detach; + * otherwise someone could attach a new sibling, change the GUID, and + * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. + */ + if (unspare) { + ASSERT(cvd->vdev_isspare); + spa_spare_remove(cvd); + unspare_guid = cvd->vdev_guid; + (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); + cvd->vdev_unspare = B_TRUE; + } + + /* + * If the parent mirror/replacing vdev only has one child, + * the parent is no longer needed. Remove it from the tree. + */ + if (pvd->vdev_children == 1) { + if (pvd->vdev_ops == &vdev_spare_ops) + cvd->vdev_unspare = B_FALSE; + vdev_remove_parent(cvd); + cvd->vdev_resilvering = B_FALSE; + } + + + /* + * We don't set tvd until now because the parent we just removed + * may have been the previous top-level vdev. + */ + tvd = cvd->vdev_top; + ASSERT(tvd->vdev_parent == rvd); + + /* + * Reevaluate the parent vdev state. + */ + vdev_propagate_state(cvd); + + /* + * If the 'autoexpand' property is set on the pool then automatically + * try to expand the size of the pool. For example if the device we + * just detached was smaller than the others, it may be possible to + * add metaslabs (i.e. grow the pool). We need to reopen the vdev + * first so that we can obtain the updated sizes of the leaf vdevs. + */ + if (spa->spa_autoexpand) { + vdev_reopen(tvd); + vdev_expand(tvd, txg); + } + + vdev_config_dirty(tvd); + + /* + * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that + * vd->vdev_detached is set and free vd's DTL object in syncing context. + * But first make sure we're not on any *other* txg's DTL list, to + * prevent vd from being accessed after it's freed. + */ + vdpath = spa_strdup(vd->vdev_path); + for (int t = 0; t < TXG_SIZE; t++) + (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); + vd->vdev_detached = B_TRUE; + vdev_dirty(tvd, VDD_DTL, vd, txg); + + spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE); + + /* hang on to the spa before we release the lock */ + spa_open_ref(spa, FTAG); + + error = spa_vdev_exit(spa, vd, txg, 0); + + spa_history_log_internal(LOG_POOL_VDEV_DETACH, spa, NULL, + "vdev=%s", vdpath); + spa_strfree(vdpath); + + /* + * If this was the removal of the original device in a hot spare vdev, + * then we want to go through and remove the device from the hot spare + * list of every other pool. + */ + if (unspare) { + spa_t *altspa = NULL; + + mutex_enter(&spa_namespace_lock); + while ((altspa = spa_next(altspa)) != NULL) { + if (altspa->spa_state != POOL_STATE_ACTIVE || + altspa == spa) + continue; + + spa_open_ref(altspa, FTAG); + mutex_exit(&spa_namespace_lock); + (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); + mutex_enter(&spa_namespace_lock); + spa_close(altspa, FTAG); + } + mutex_exit(&spa_namespace_lock); + + /* search the rest of the vdevs for spares to remove */ + spa_vdev_resilver_done(spa); + } + + /* all done with the spa; OK to release */ + mutex_enter(&spa_namespace_lock); + spa_close(spa, FTAG); + mutex_exit(&spa_namespace_lock); + + return (error); +} + +/* + * Split a set of devices from their mirrors, and create a new pool from them. + */ +int +spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, + nvlist_t *props, boolean_t exp) +{ + int error = 0; + uint64_t txg, *glist; + spa_t *newspa; + uint_t c, children, lastlog; + nvlist_t **child, *nvl, *tmp; + dmu_tx_t *tx; + char *altroot = NULL; + vdev_t *rvd, **vml = NULL; /* vdev modify list */ + boolean_t activate_slog; + + ASSERT(spa_writeable(spa)); + + txg = spa_vdev_enter(spa); + + /* clear the log and flush everything up to now */ + activate_slog = spa_passivate_log(spa); + (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); + error = spa_offline_log(spa); + txg = spa_vdev_config_enter(spa); + + if (activate_slog) + spa_activate_log(spa); + + if (error != 0) + return (spa_vdev_exit(spa, NULL, txg, error)); + + /* check new spa name before going any further */ + if (spa_lookup(newname) != NULL) + return (spa_vdev_exit(spa, NULL, txg, EEXIST)); + + /* + * scan through all the children to ensure they're all mirrors + */ + if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || + nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, + &children) != 0) + return (spa_vdev_exit(spa, NULL, txg, EINVAL)); + + /* first, check to ensure we've got the right child count */ + rvd = spa->spa_root_vdev; + lastlog = 0; + for (c = 0; c < rvd->vdev_children; c++) { + vdev_t *vd = rvd->vdev_child[c]; + + /* don't count the holes & logs as children */ + if (vd->vdev_islog || vd->vdev_ishole) { + if (lastlog == 0) + lastlog = c; + continue; + } + + lastlog = 0; + } + if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) + return (spa_vdev_exit(spa, NULL, txg, EINVAL)); + + /* next, ensure no spare or cache devices are part of the split */ + if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || + nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) + return (spa_vdev_exit(spa, NULL, txg, EINVAL)); + + vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); + glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); + + /* then, loop over each vdev and validate it */ + for (c = 0; c < children; c++) { + uint64_t is_hole = 0; + + (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, + &is_hole); + + if (is_hole != 0) { + if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || + spa->spa_root_vdev->vdev_child[c]->vdev_islog) { + continue; + } else { + error = EINVAL; + break; + } + } + + /* which disk is going to be split? */ + if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, + &glist[c]) != 0) { + error = EINVAL; + break; + } + + /* look it up in the spa */ + vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE); + if (vml[c] == NULL) { + error = ENODEV; + break; + } + + /* make sure there's nothing stopping the split */ + if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops || + vml[c]->vdev_islog || + vml[c]->vdev_ishole || + vml[c]->vdev_isspare || + vml[c]->vdev_isl2cache || + !vdev_writeable(vml[c]) || + vml[c]->vdev_children != 0 || + vml[c]->vdev_state != VDEV_STATE_HEALTHY || + c != spa->spa_root_vdev->vdev_child[c]->vdev_id) { + error = EINVAL; + break; + } + + if (vdev_dtl_required(vml[c])) { + error = EBUSY; + break; + } + + /* we need certain info from the top level */ + VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY, + vml[c]->vdev_top->vdev_ms_array) == 0); + VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT, + vml[c]->vdev_top->vdev_ms_shift) == 0); + VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE, + vml[c]->vdev_top->vdev_asize) == 0); + VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT, + vml[c]->vdev_top->vdev_ashift) == 0); + } + + if (error != 0) { + kmem_free(vml, children * sizeof (vdev_t *)); + kmem_free(glist, children * sizeof (uint64_t)); + return (spa_vdev_exit(spa, NULL, txg, error)); + } + + /* stop writers from using the disks */ + for (c = 0; c < children; c++) { + if (vml[c] != NULL) + vml[c]->vdev_offline = B_TRUE; + } + vdev_reopen(spa->spa_root_vdev); + + /* + * Temporarily record the splitting vdevs in the spa config. This + * will disappear once the config is regenerated. + */ + VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); + VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, + glist, children) == 0); + kmem_free(glist, children * sizeof (uint64_t)); + + mutex_enter(&spa->spa_props_lock); + VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, + nvl) == 0); + mutex_exit(&spa->spa_props_lock); + spa->spa_config_splitting = nvl; + vdev_config_dirty(spa->spa_root_vdev); + + /* configure and create the new pool */ + VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); + VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, + exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); + VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, + spa_version(spa)) == 0); + VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, + spa->spa_config_txg) == 0); + VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, + spa_generate_guid(NULL)) == 0); + (void) nvlist_lookup_string(props, + zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); + + /* add the new pool to the namespace */ + newspa = spa_add(newname, config, altroot); + newspa->spa_config_txg = spa->spa_config_txg; + spa_set_log_state(newspa, SPA_LOG_CLEAR); + + /* release the spa config lock, retaining the namespace lock */ + spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); + + if (zio_injection_enabled) + zio_handle_panic_injection(spa, FTAG, 1); + + spa_activate(newspa, spa_mode_global); + spa_async_suspend(newspa); + + /* create the new pool from the disks of the original pool */ + error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE); + if (error) + goto out; + + /* if that worked, generate a real config for the new pool */ + if (newspa->spa_root_vdev != NULL) { + VERIFY(nvlist_alloc(&newspa->spa_config_splitting, + NV_UNIQUE_NAME, KM_SLEEP) == 0); + VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, + ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); + spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, + B_TRUE)); + } + + /* set the props */ + if (props != NULL) { + spa_configfile_set(newspa, props, B_FALSE); + error = spa_prop_set(newspa, props); + if (error) + goto out; + } + + /* flush everything */ + txg = spa_vdev_config_enter(newspa); + vdev_config_dirty(newspa->spa_root_vdev); + (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); + + if (zio_injection_enabled) + zio_handle_panic_injection(spa, FTAG, 2); + + spa_async_resume(newspa); + + /* finally, update the original pool's config */ + txg = spa_vdev_config_enter(spa); + tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); + error = dmu_tx_assign(tx, TXG_WAIT); + if (error != 0) + dmu_tx_abort(tx); + for (c = 0; c < children; c++) { + if (vml[c] != NULL) { + vdev_split(vml[c]); + if (error == 0) + spa_history_log_internal(LOG_POOL_VDEV_DETACH, + spa, tx, "vdev=%s", + vml[c]->vdev_path); + vdev_free(vml[c]); + } + } + vdev_config_dirty(spa->spa_root_vdev); + spa->spa_config_splitting = NULL; + nvlist_free(nvl); + if (error == 0) + dmu_tx_commit(tx); + (void) spa_vdev_exit(spa, NULL, txg, 0); + + if (zio_injection_enabled) + zio_handle_panic_injection(spa, FTAG, 3); + + /* split is complete; log a history record */ + spa_history_log_internal(LOG_POOL_SPLIT, newspa, NULL, + "split new pool %s from pool %s", newname, spa_name(spa)); + + kmem_free(vml, children * sizeof (vdev_t *)); + + /* if we're not going to mount the filesystems in userland, export */ + if (exp) + error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL, + B_FALSE, B_FALSE); + + return (error); + +out: + spa_unload(newspa); + spa_deactivate(newspa); + spa_remove(newspa); + + txg = spa_vdev_config_enter(spa); + + /* re-online all offlined disks */ + for (c = 0; c < children; c++) { + if (vml[c] != NULL) + vml[c]->vdev_offline = B_FALSE; + } + vdev_reopen(spa->spa_root_vdev); + + nvlist_free(spa->spa_config_splitting); + spa->spa_config_splitting = NULL; + (void) spa_vdev_exit(spa, NULL, txg, error); + + kmem_free(vml, children * sizeof (vdev_t *)); + return (error); +} + +static nvlist_t * +spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid) +{ + for (int i = 0; i < count; i++) { + uint64_t guid; + + VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID, + &guid) == 0); + + if (guid == target_guid) + return (nvpp[i]); + } + + return (NULL); +} + +static void +spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, + nvlist_t *dev_to_remove) +{ + nvlist_t **newdev = NULL; + + if (count > 1) + newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); + + for (int i = 0, j = 0; i < count; i++) { + if (dev[i] == dev_to_remove) + continue; + VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0); + } + + VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0); + VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0); + + for (int i = 0; i < count - 1; i++) + nvlist_free(newdev[i]); + + if (count > 1) + kmem_free(newdev, (count - 1) * sizeof (void *)); +} + +/* + * Evacuate the device. + */ +static int +spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd) +{ + uint64_t txg; + int error = 0; + + ASSERT(MUTEX_HELD(&spa_namespace_lock)); + ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); + ASSERT(vd == vd->vdev_top); + + /* + * Evacuate the device. We don't hold the config lock as writer + * since we need to do I/O but we do keep the + * spa_namespace_lock held. Once this completes the device + * should no longer have any blocks allocated on it. + */ + if (vd->vdev_islog) { + if (vd->vdev_stat.vs_alloc != 0) + error = spa_offline_log(spa); + } else { + error = ENOTSUP; + } + + if (error) + return (error); + + /* + * The evacuation succeeded. Remove any remaining MOS metadata + * associated with this vdev, and wait for these changes to sync. + */ + ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0); + txg = spa_vdev_config_enter(spa); + vd->vdev_removing = B_TRUE; + vdev_dirty(vd, 0, NULL, txg); + vdev_config_dirty(vd); + spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); + + return (0); +} + +/* + * Complete the removal by cleaning up the namespace. + */ +static void +spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd) +{ + vdev_t *rvd = spa->spa_root_vdev; + uint64_t id = vd->vdev_id; + boolean_t last_vdev = (id == (rvd->vdev_children - 1)); + + ASSERT(MUTEX_HELD(&spa_namespace_lock)); + ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); + ASSERT(vd == vd->vdev_top); + + /* + * Only remove any devices which are empty. + */ + if (vd->vdev_stat.vs_alloc != 0) + return; + + (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); + + if (list_link_active(&vd->vdev_state_dirty_node)) + vdev_state_clean(vd); + if (list_link_active(&vd->vdev_config_dirty_node)) + vdev_config_clean(vd); + + vdev_free(vd); + + if (last_vdev) { + vdev_compact_children(rvd); + } else { + vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops); + vdev_add_child(rvd, vd); + } + vdev_config_dirty(rvd); + + /* + * Reassess the health of our root vdev. + */ + vdev_reopen(rvd); +} + +/* + * Remove a device from the pool - + * + * Removing a device from the vdev namespace requires several steps + * and can take a significant amount of time. As a result we use + * the spa_vdev_config_[enter/exit] functions which allow us to + * grab and release the spa_config_lock while still holding the namespace + * lock. During each step the configuration is synced out. + */ + +/* + * Remove a device from the pool. Currently, this supports removing only hot + * spares, slogs, and level 2 ARC devices. + */ +int +spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) +{ + vdev_t *vd; + metaslab_group_t *mg; + nvlist_t **spares, **l2cache, *nv; + uint64_t txg = 0; + uint_t nspares, nl2cache; + int error = 0; + boolean_t locked = MUTEX_HELD(&spa_namespace_lock); + + ASSERT(spa_writeable(spa)); + + if (!locked) + txg = spa_vdev_enter(spa); + + vd = spa_lookup_by_guid(spa, guid, B_FALSE); + + if (spa->spa_spares.sav_vdevs != NULL && + nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, + ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 && + (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) { + /* + * Only remove the hot spare if it's not currently in use + * in this pool. + */ + if (vd == NULL || unspare) { + spa_vdev_remove_aux(spa->spa_spares.sav_config, + ZPOOL_CONFIG_SPARES, spares, nspares, nv); + spa_load_spares(spa); + spa->spa_spares.sav_sync = B_TRUE; + } else { + error = EBUSY; + } + } else if (spa->spa_l2cache.sav_vdevs != NULL && + nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, + ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 && + (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) { + /* + * Cache devices can always be removed. + */ + spa_vdev_remove_aux(spa->spa_l2cache.sav_config, + ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv); + spa_load_l2cache(spa); + spa->spa_l2cache.sav_sync = B_TRUE; + } else if (vd != NULL && vd->vdev_islog) { + ASSERT(!locked); + ASSERT(vd == vd->vdev_top); + + /* + * XXX - Once we have bp-rewrite this should + * become the common case. + */ + + mg = vd->vdev_mg; + + /* + * Stop allocating from this vdev. + */ + metaslab_group_passivate(mg); + + /* + * Wait for the youngest allocations and frees to sync, + * and then wait for the deferral of those frees to finish. + */ + spa_vdev_config_exit(spa, NULL, + txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); + + /* + * Attempt to evacuate the vdev. + */ + error = spa_vdev_remove_evacuate(spa, vd); + + txg = spa_vdev_config_enter(spa); + + /* + * If we couldn't evacuate the vdev, unwind. + */ + if (error) { + metaslab_group_activate(mg); + return (spa_vdev_exit(spa, NULL, txg, error)); + } + + /* + * Clean up the vdev namespace. + */ + spa_vdev_remove_from_namespace(spa, vd); + + } else if (vd != NULL) { + /* + * Normal vdevs cannot be removed (yet). + */ + error = ENOTSUP; + } else { + /* + * There is no vdev of any kind with the specified guid. + */ + error = ENOENT; + } + + if (!locked) + return (spa_vdev_exit(spa, NULL, txg, error)); + + return (error); +} + +/* + * Find any device that's done replacing, or a vdev marked 'unspare' that's + * current spared, so we can detach it. + */ +static vdev_t * +spa_vdev_resilver_done_hunt(vdev_t *vd) +{ + vdev_t *newvd, *oldvd; + + for (int c = 0; c < vd->vdev_children; c++) { + oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); + if (oldvd != NULL) + return (oldvd); + } + + /* + * Check for a completed replacement. We always consider the first + * vdev in the list to be the oldest vdev, and the last one to be + * the newest (see spa_vdev_attach() for how that works). In + * the case where the newest vdev is faulted, we will not automatically + * remove it after a resilver completes. This is OK as it will require + * user intervention to determine which disk the admin wishes to keep. + */ + if (vd->vdev_ops == &vdev_replacing_ops) { + ASSERT(vd->vdev_children > 1); + + newvd = vd->vdev_child[vd->vdev_children - 1]; + oldvd = vd->vdev_child[0]; + + if (vdev_dtl_empty(newvd, DTL_MISSING) && + vdev_dtl_empty(newvd, DTL_OUTAGE) && + !vdev_dtl_required(oldvd)) + return (oldvd); + } + + /* + * Check for a completed resilver with the 'unspare' flag set. + */ + if (vd->vdev_ops == &vdev_spare_ops) { + vdev_t *first = vd->vdev_child[0]; + vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; + + if (last->vdev_unspare) { + oldvd = first; + newvd = last; + } else if (first->vdev_unspare) { + oldvd = last; + newvd = first; + } else { + oldvd = NULL; + } + + if (oldvd != NULL && + vdev_dtl_empty(newvd, DTL_MISSING) && + vdev_dtl_empty(newvd, DTL_OUTAGE) && + !vdev_dtl_required(oldvd)) + return (oldvd); + + /* + * If there are more than two spares attached to a disk, + * and those spares are not required, then we want to + * attempt to free them up now so that they can be used + * by other pools. Once we're back down to a single + * disk+spare, we stop removing them. + */ + if (vd->vdev_children > 2) { + newvd = vd->vdev_child[1]; + + if (newvd->vdev_isspare && last->vdev_isspare && + vdev_dtl_empty(last, DTL_MISSING) && + vdev_dtl_empty(last, DTL_OUTAGE) && + !vdev_dtl_required(newvd)) + return (newvd); + } + } + + return (NULL); +} + +static void +spa_vdev_resilver_done(spa_t *spa) +{ + vdev_t *vd, *pvd, *ppvd; + uint64_t guid, sguid, pguid, ppguid; + + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + + while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { + pvd = vd->vdev_parent; + ppvd = pvd->vdev_parent; + guid = vd->vdev_guid; + pguid = pvd->vdev_guid; + ppguid = ppvd->vdev_guid; + sguid = 0; + /* + * If we have just finished replacing a hot spared device, then + * we need to detach the parent's first child (the original hot + * spare) as well. + */ + if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && + ppvd->vdev_children == 2) { + ASSERT(pvd->vdev_ops == &vdev_replacing_ops); + sguid = ppvd->vdev_child[1]->vdev_guid; + } + spa_config_exit(spa, SCL_ALL, FTAG); + if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) + return; + if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) + return; + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + } + + spa_config_exit(spa, SCL_ALL, FTAG); +} + +/* + * Update the stored path or FRU for this vdev. + */ +int +spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, + boolean_t ispath) +{ + vdev_t *vd; + boolean_t sync = B_FALSE; + + ASSERT(spa_writeable(spa)); + + spa_vdev_state_enter(spa, SCL_ALL); + + if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) + return (spa_vdev_state_exit(spa, NULL, ENOENT)); + + if (!vd->vdev_ops->vdev_op_leaf) + return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); + + if (ispath) { + if (strcmp(value, vd->vdev_path) != 0) { + spa_strfree(vd->vdev_path); + vd->vdev_path = spa_strdup(value); + sync = B_TRUE; + } + } else { + if (vd->vdev_fru == NULL) { + vd->vdev_fru = spa_strdup(value); + sync = B_TRUE; + } else if (strcmp(value, vd->vdev_fru) != 0) { + spa_strfree(vd->vdev_fru); + vd->vdev_fru = spa_strdup(value); + sync = B_TRUE; + } + } + + return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); +} + +int +spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) +{ + return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); +} + +int +spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) +{ + return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); +} + +/* + * ========================================================================== + * SPA Scanning + * ========================================================================== + */ + +int +spa_scan_stop(spa_t *spa) +{ + ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); + if (dsl_scan_resilvering(spa->spa_dsl_pool)) + return (EBUSY); + return (dsl_scan_cancel(spa->spa_dsl_pool)); +} + +int +spa_scan(spa_t *spa, pool_scan_func_t func) +{ + ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); + + if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) + return (ENOTSUP); + + /* + * If a resilver was requested, but there is no DTL on a + * writeable leaf device, we have nothing to do. + */ + if (func == POOL_SCAN_RESILVER && + !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { + spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); + return (0); + } + + return (dsl_scan(spa->spa_dsl_pool, func)); +} + +/* + * ========================================================================== + * SPA async task processing + * ========================================================================== + */ + +static void +spa_async_remove(spa_t *spa, vdev_t *vd) +{ + if (vd->vdev_remove_wanted) { + vd->vdev_remove_wanted = B_FALSE; + vd->vdev_delayed_close = B_FALSE; + vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); + + /* + * We want to clear the stats, but we don't want to do a full + * vdev_clear() as that will cause us to throw away + * degraded/faulted state as well as attempt to reopen the + * device, all of which is a waste. + */ + vd->vdev_stat.vs_read_errors = 0; + vd->vdev_stat.vs_write_errors = 0; + vd->vdev_stat.vs_checksum_errors = 0; + + vdev_state_dirty(vd->vdev_top); + } + + for (int c = 0; c < vd->vdev_children; c++) + spa_async_remove(spa, vd->vdev_child[c]); +} + +static void +spa_async_probe(spa_t *spa, vdev_t *vd) +{ + if (vd->vdev_probe_wanted) { + vd->vdev_probe_wanted = B_FALSE; + vdev_reopen(vd); /* vdev_open() does the actual probe */ + } + + for (int c = 0; c < vd->vdev_children; c++) + spa_async_probe(spa, vd->vdev_child[c]); +} + +static void +spa_async_autoexpand(spa_t *spa, vdev_t *vd) +{ + sysevent_id_t eid; + nvlist_t *attr; + char *physpath; + + if (!spa->spa_autoexpand) + return; + + for (int c = 0; c < vd->vdev_children; c++) { + vdev_t *cvd = vd->vdev_child[c]; + spa_async_autoexpand(spa, cvd); + } + + if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL) + return; + + physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP); + (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath); + + VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0); + VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0); + + (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS, + ESC_DEV_DLE, attr, &eid, DDI_SLEEP); + + nvlist_free(attr); + kmem_free(physpath, MAXPATHLEN); +} + +static void +spa_async_thread(spa_t *spa) +{ + int tasks; + + ASSERT(spa->spa_sync_on); + + mutex_enter(&spa->spa_async_lock); + tasks = spa->spa_async_tasks; + spa->spa_async_tasks = 0; + mutex_exit(&spa->spa_async_lock); + + /* + * See if the config needs to be updated. + */ + if (tasks & SPA_ASYNC_CONFIG_UPDATE) { + uint64_t old_space, new_space; + + mutex_enter(&spa_namespace_lock); + old_space = metaslab_class_get_space(spa_normal_class(spa)); + spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); + new_space = metaslab_class_get_space(spa_normal_class(spa)); + mutex_exit(&spa_namespace_lock); + + /* + * If the pool grew as a result of the config update, + * then log an internal history event. + */ + if (new_space != old_space) { + spa_history_log_internal(LOG_POOL_VDEV_ONLINE, + spa, NULL, + "pool '%s' size: %llu(+%llu)", + spa_name(spa), new_space, new_space - old_space); + } + } + + /* + * See if any devices need to be marked REMOVED. + */ + if (tasks & SPA_ASYNC_REMOVE) { + spa_vdev_state_enter(spa, SCL_NONE); + spa_async_remove(spa, spa->spa_root_vdev); + for (int i = 0; i < spa->spa_l2cache.sav_count; i++) + spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]); + for (int i = 0; i < spa->spa_spares.sav_count; i++) + spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]); + (void) spa_vdev_state_exit(spa, NULL, 0); + } + + if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) { + spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); + spa_async_autoexpand(spa, spa->spa_root_vdev); + spa_config_exit(spa, SCL_CONFIG, FTAG); + } + + /* + * See if any devices need to be probed. + */ + if (tasks & SPA_ASYNC_PROBE) { + spa_vdev_state_enter(spa, SCL_NONE); + spa_async_probe(spa, spa->spa_root_vdev); + (void) spa_vdev_state_exit(spa, NULL, 0); + } + + /* + * If any devices are done replacing, detach them. + */ + if (tasks & SPA_ASYNC_RESILVER_DONE) + spa_vdev_resilver_done(spa); + + /* + * Kick off a resilver. + */ + if (tasks & SPA_ASYNC_RESILVER) + dsl_resilver_restart(spa->spa_dsl_pool, 0); + + /* + * Let the world know that we're done. + */ + mutex_enter(&spa->spa_async_lock); + spa->spa_async_thread = NULL; + cv_broadcast(&spa->spa_async_cv); + mutex_exit(&spa->spa_async_lock); + thread_exit(); +} + +void +spa_async_suspend(spa_t *spa) +{ + mutex_enter(&spa->spa_async_lock); + spa->spa_async_suspended++; + while (spa->spa_async_thread != NULL) + cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); + mutex_exit(&spa->spa_async_lock); +} + +void +spa_async_resume(spa_t *spa) +{ + mutex_enter(&spa->spa_async_lock); + ASSERT(spa->spa_async_suspended != 0); + spa->spa_async_suspended--; + mutex_exit(&spa->spa_async_lock); +} + +static void +spa_async_dispatch(spa_t *spa) +{ + mutex_enter(&spa->spa_async_lock); + if (spa->spa_async_tasks && !spa->spa_async_suspended && + spa->spa_async_thread == NULL && + rootdir != NULL && !vn_is_readonly(rootdir)) + spa->spa_async_thread = thread_create(NULL, 0, + spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); + mutex_exit(&spa->spa_async_lock); +} + +void +spa_async_request(spa_t *spa, int task) +{ + zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); + mutex_enter(&spa->spa_async_lock); + spa->spa_async_tasks |= task; + mutex_exit(&spa->spa_async_lock); +} + +/* + * ========================================================================== + * SPA syncing routines + * ========================================================================== + */ + +static int +bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) +{ + bpobj_t *bpo = arg; + bpobj_enqueue(bpo, bp, tx); + return (0); +} + +static int +spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) +{ + zio_t *zio = arg; + + zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, + zio->io_flags)); + return (0); +} + +static void +spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) +{ + char *packed = NULL; + size_t bufsize; + size_t nvsize = 0; + dmu_buf_t *db; + + VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); + + /* + * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration + * information. This avoids the dbuf_will_dirty() path and + * saves us a pre-read to get data we don't actually care about. + */ + bufsize = P2ROUNDUP(nvsize, SPA_CONFIG_BLOCKSIZE); + packed = kmem_alloc(bufsize, KM_SLEEP); + + VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, + KM_SLEEP) == 0); + bzero(packed + nvsize, bufsize - nvsize); + + dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); + + kmem_free(packed, bufsize); + + VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); + dmu_buf_will_dirty(db, tx); + *(uint64_t *)db->db_data = nvsize; + dmu_buf_rele(db, FTAG); +} + +static void +spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, + const char *config, const char *entry) +{ + nvlist_t *nvroot; + nvlist_t **list; + int i; + + if (!sav->sav_sync) + return; + + /* + * Update the MOS nvlist describing the list of available devices. + * spa_validate_aux() will have already made sure this nvlist is + * valid and the vdevs are labeled appropriately. + */ + if (sav->sav_object == 0) { + sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, + DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, + sizeof (uint64_t), tx); + VERIFY(zap_update(spa->spa_meta_objset, + DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, + &sav->sav_object, tx) == 0); + } + + VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); + if (sav->sav_count == 0) { + VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); + } else { + list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); + for (i = 0; i < sav->sav_count; i++) + list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], + B_FALSE, VDEV_CONFIG_L2CACHE); + VERIFY(nvlist_add_nvlist_array(nvroot, config, list, + sav->sav_count) == 0); + for (i = 0; i < sav->sav_count; i++) + nvlist_free(list[i]); + kmem_free(list, sav->sav_count * sizeof (void *)); + } + + spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); + nvlist_free(nvroot); + + sav->sav_sync = B_FALSE; +} + +static void +spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) +{ + nvlist_t *config; + + if (list_is_empty(&spa->spa_config_dirty_list)) + return; + + spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); + + config = spa_config_generate(spa, spa->spa_root_vdev, + dmu_tx_get_txg(tx), B_FALSE); + + spa_config_exit(spa, SCL_STATE, FTAG); + + if (spa->spa_config_syncing) + nvlist_free(spa->spa_config_syncing); + spa->spa_config_syncing = config; + + spa_sync_nvlist(spa, spa->spa_config_object, config, tx); +} + +/* + * Set zpool properties. + */ +static void +spa_sync_props(void *arg1, void *arg2, dmu_tx_t *tx) +{ + spa_t *spa = arg1; + objset_t *mos = spa->spa_meta_objset; + nvlist_t *nvp = arg2; + nvpair_t *elem; + uint64_t intval; + char *strval; + zpool_prop_t prop; + const char *propname; + zprop_type_t proptype; + + mutex_enter(&spa->spa_props_lock); + + elem = NULL; + while ((elem = nvlist_next_nvpair(nvp, elem))) { + switch (prop = zpool_name_to_prop(nvpair_name(elem))) { + case ZPOOL_PROP_VERSION: + /* + * Only set version for non-zpool-creation cases + * (set/import). spa_create() needs special care + * for version setting. + */ + if (tx->tx_txg != TXG_INITIAL) { + VERIFY(nvpair_value_uint64(elem, + &intval) == 0); + ASSERT(intval <= SPA_VERSION); + ASSERT(intval >= spa_version(spa)); + spa->spa_uberblock.ub_version = intval; + vdev_config_dirty(spa->spa_root_vdev); + } + break; + + case ZPOOL_PROP_ALTROOT: + /* + * 'altroot' is a non-persistent property. It should + * have been set temporarily at creation or import time. + */ + ASSERT(spa->spa_root != NULL); + break; + + case ZPOOL_PROP_READONLY: + case ZPOOL_PROP_CACHEFILE: + /* + * 'readonly' and 'cachefile' are also non-persisitent + * properties. + */ + break; + default: + /* + * Set pool property values in the poolprops mos object. + */ + if (spa->spa_pool_props_object == 0) { + VERIFY((spa->spa_pool_props_object = + zap_create(mos, DMU_OT_POOL_PROPS, + DMU_OT_NONE, 0, tx)) > 0); + + VERIFY(zap_update(mos, + DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, + 8, 1, &spa->spa_pool_props_object, tx) + == 0); + } + + /* normalize the property name */ + propname = zpool_prop_to_name(prop); + proptype = zpool_prop_get_type(prop); + + if (nvpair_type(elem) == DATA_TYPE_STRING) { + ASSERT(proptype == PROP_TYPE_STRING); + VERIFY(nvpair_value_string(elem, &strval) == 0); + VERIFY(zap_update(mos, + spa->spa_pool_props_object, propname, + 1, strlen(strval) + 1, strval, tx) == 0); + + } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { + VERIFY(nvpair_value_uint64(elem, &intval) == 0); + + if (proptype == PROP_TYPE_INDEX) { + const char *unused; + VERIFY(zpool_prop_index_to_string( + prop, intval, &unused) == 0); + } + VERIFY(zap_update(mos, + spa->spa_pool_props_object, propname, + 8, 1, &intval, tx) == 0); + } else { + ASSERT(0); /* not allowed */ + } + + switch (prop) { + case ZPOOL_PROP_DELEGATION: + spa->spa_delegation = intval; + break; + case ZPOOL_PROP_BOOTFS: + spa->spa_bootfs = intval; + break; + case ZPOOL_PROP_FAILUREMODE: + spa->spa_failmode = intval; + break; + case ZPOOL_PROP_AUTOEXPAND: + spa->spa_autoexpand = intval; + if (tx->tx_txg != TXG_INITIAL) + spa_async_request(spa, + SPA_ASYNC_AUTOEXPAND); + break; + case ZPOOL_PROP_DEDUPDITTO: + spa->spa_dedup_ditto = intval; + break; + default: + break; + } + } + + /* log internal history if this is not a zpool create */ + if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY && + tx->tx_txg != TXG_INITIAL) { + spa_history_log_internal(LOG_POOL_PROPSET, + spa, tx, "%s %lld %s", + nvpair_name(elem), intval, spa_name(spa)); + } + } + + mutex_exit(&spa->spa_props_lock); +} + +/* + * Perform one-time upgrade on-disk changes. spa_version() does not + * reflect the new version this txg, so there must be no changes this + * txg to anything that the upgrade code depends on after it executes. + * Therefore this must be called after dsl_pool_sync() does the sync + * tasks. + */ +static void +spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) +{ + dsl_pool_t *dp = spa->spa_dsl_pool; + + ASSERT(spa->spa_sync_pass == 1); + + if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN && + spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) { + dsl_pool_create_origin(dp, tx); + + /* Keeping the origin open increases spa_minref */ + spa->spa_minref += 3; + } + + if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES && + spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) { + dsl_pool_upgrade_clones(dp, tx); + } + + if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES && + spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) { + dsl_pool_upgrade_dir_clones(dp, tx); + + /* Keeping the freedir open increases spa_minref */ + spa->spa_minref += 3; + } +} + +/* + * Sync the specified transaction group. New blocks may be dirtied as + * part of the process, so we iterate until it converges. + */ +void +spa_sync(spa_t *spa, uint64_t txg) +{ + dsl_pool_t *dp = spa->spa_dsl_pool; + objset_t *mos = spa->spa_meta_objset; + bpobj_t *defer_bpo = &spa->spa_deferred_bpobj; + bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; + vdev_t *rvd = spa->spa_root_vdev; + vdev_t *vd; + dmu_tx_t *tx; + int error; + + VERIFY(spa_writeable(spa)); + + /* + * Lock out configuration changes. + */ + spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); + + spa->spa_syncing_txg = txg; + spa->spa_sync_pass = 0; + + /* + * If there are any pending vdev state changes, convert them + * into config changes that go out with this transaction group. + */ + spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); + while (list_head(&spa->spa_state_dirty_list) != NULL) { + /* + * We need the write lock here because, for aux vdevs, + * calling vdev_config_dirty() modifies sav_config. + * This is ugly and will become unnecessary when we + * eliminate the aux vdev wart by integrating all vdevs + * into the root vdev tree. + */ + spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); + spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); + while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { + vdev_state_clean(vd); + vdev_config_dirty(vd); + } + spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); + spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); + } + spa_config_exit(spa, SCL_STATE, FTAG); + + tx = dmu_tx_create_assigned(dp, txg); + + /* + * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, + * set spa_deflate if we have no raid-z vdevs. + */ + if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && + spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { + int i; + + for (i = 0; i < rvd->vdev_children; i++) { + vd = rvd->vdev_child[i]; + if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) + break; + } + if (i == rvd->vdev_children) { + spa->spa_deflate = TRUE; + VERIFY(0 == zap_add(spa->spa_meta_objset, + DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, + sizeof (uint64_t), 1, &spa->spa_deflate, tx)); + } + } + + /* + * If anything has changed in this txg, or if someone is waiting + * for this txg to sync (eg, spa_vdev_remove()), push the + * deferred frees from the previous txg. If not, leave them + * alone so that we don't generate work on an otherwise idle + * system. + */ + if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || + !txg_list_empty(&dp->dp_dirty_dirs, txg) || + !txg_list_empty(&dp->dp_sync_tasks, txg) || + ((dsl_scan_active(dp->dp_scan) || + txg_sync_waiting(dp)) && !spa_shutting_down(spa))) { + zio_t *zio = zio_root(spa, NULL, NULL, 0); + VERIFY3U(bpobj_iterate(defer_bpo, + spa_free_sync_cb, zio, tx), ==, 0); + VERIFY3U(zio_wait(zio), ==, 0); + } + + /* + * Iterate to convergence. + */ + do { + int pass = ++spa->spa_sync_pass; + + spa_sync_config_object(spa, tx); + spa_sync_aux_dev(spa, &spa->spa_spares, tx, + ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); + spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, + ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); + spa_errlog_sync(spa, txg); + dsl_pool_sync(dp, txg); + + if (pass <= SYNC_PASS_DEFERRED_FREE) { + zio_t *zio = zio_root(spa, NULL, NULL, 0); + bplist_iterate(free_bpl, spa_free_sync_cb, + zio, tx); + VERIFY(zio_wait(zio) == 0); + } else { + bplist_iterate(free_bpl, bpobj_enqueue_cb, + defer_bpo, tx); + } + + ddt_sync(spa, txg); + dsl_scan_sync(dp, tx); + + while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) + vdev_sync(vd, txg); + + if (pass == 1) + spa_sync_upgrades(spa, tx); + + } while (dmu_objset_is_dirty(mos, txg)); + + /* + * Rewrite the vdev configuration (which includes the uberblock) + * to commit the transaction group. + * + * If there are no dirty vdevs, we sync the uberblock to a few + * random top-level vdevs that are known to be visible in the + * config cache (see spa_vdev_add() for a complete description). + * If there *are* dirty vdevs, sync the uberblock to all vdevs. + */ + for (;;) { + /* + * We hold SCL_STATE to prevent vdev open/close/etc. + * while we're attempting to write the vdev labels. + */ + spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); + + if (list_is_empty(&spa->spa_config_dirty_list)) { + vdev_t *svd[SPA_DVAS_PER_BP]; + int svdcount = 0; + int children = rvd->vdev_children; + int c0 = spa_get_random(children); + + for (int c = 0; c < children; c++) { + vd = rvd->vdev_child[(c0 + c) % children]; + if (vd->vdev_ms_array == 0 || vd->vdev_islog) + continue; + svd[svdcount++] = vd; + if (svdcount == SPA_DVAS_PER_BP) + break; + } + error = vdev_config_sync(svd, svdcount, txg, B_FALSE); + if (error != 0) + error = vdev_config_sync(svd, svdcount, txg, + B_TRUE); + } else { + error = vdev_config_sync(rvd->vdev_child, + rvd->vdev_children, txg, B_FALSE); + if (error != 0) + error = vdev_config_sync(rvd->vdev_child, + rvd->vdev_children, txg, B_TRUE); + } + + spa_config_exit(spa, SCL_STATE, FTAG); + + if (error == 0) + break; + zio_suspend(spa, NULL); + zio_resume_wait(spa); + } + dmu_tx_commit(tx); + + /* + * Clear the dirty config list. + */ + while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) + vdev_config_clean(vd); + + /* + * Now that the new config has synced transactionally, + * let it become visible to the config cache. + */ + if (spa->spa_config_syncing != NULL) { + spa_config_set(spa, spa->spa_config_syncing); + spa->spa_config_txg = txg; + spa->spa_config_syncing = NULL; + } + + spa->spa_ubsync = spa->spa_uberblock; + + dsl_pool_sync_done(dp, txg); + + /* + * Update usable space statistics. + */ + while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) + vdev_sync_done(vd, txg); + + spa_update_dspace(spa); + + /* + * It had better be the case that we didn't dirty anything + * since vdev_config_sync(). + */ + ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); + ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); + ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); + + spa->spa_sync_pass = 0; + + spa_config_exit(spa, SCL_CONFIG, FTAG); + + spa_handle_ignored_writes(spa); + + /* + * If any async tasks have been requested, kick them off. + */ + spa_async_dispatch(spa); +} + +/* + * Sync all pools. We don't want to hold the namespace lock across these + * operations, so we take a reference on the spa_t and drop the lock during the + * sync. + */ +void +spa_sync_allpools(void) +{ + spa_t *spa = NULL; + mutex_enter(&spa_namespace_lock); + while ((spa = spa_next(spa)) != NULL) { + if (spa_state(spa) != POOL_STATE_ACTIVE || + !spa_writeable(spa) || spa_suspended(spa)) + continue; + spa_open_ref(spa, FTAG); + mutex_exit(&spa_namespace_lock); + txg_wait_synced(spa_get_dsl(spa), 0); + mutex_enter(&spa_namespace_lock); + spa_close(spa, FTAG); + } + mutex_exit(&spa_namespace_lock); +} + +/* + * ========================================================================== + * Miscellaneous routines + * ========================================================================== + */ + +/* + * Remove all pools in the system. + */ +void +spa_evict_all(void) +{ + spa_t *spa; + + /* + * Remove all cached state. All pools should be closed now, + * so every spa in the AVL tree should be unreferenced. + */ + mutex_enter(&spa_namespace_lock); + while ((spa = spa_next(NULL)) != NULL) { + /* + * Stop async tasks. The async thread may need to detach + * a device that's been replaced, which requires grabbing + * spa_namespace_lock, so we must drop it here. + */ + spa_open_ref(spa, FTAG); + mutex_exit(&spa_namespace_lock); + spa_async_suspend(spa); + mutex_enter(&spa_namespace_lock); + spa_close(spa, FTAG); + + if (spa->spa_state != POOL_STATE_UNINITIALIZED) { + spa_unload(spa); + spa_deactivate(spa); + } + spa_remove(spa); + } + mutex_exit(&spa_namespace_lock); +} + +vdev_t * +spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) +{ + vdev_t *vd; + int i; + + if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) + return (vd); + + if (aux) { + for (i = 0; i < spa->spa_l2cache.sav_count; i++) { + vd = spa->spa_l2cache.sav_vdevs[i]; + if (vd->vdev_guid == guid) + return (vd); + } + + for (i = 0; i < spa->spa_spares.sav_count; i++) { + vd = spa->spa_spares.sav_vdevs[i]; + if (vd->vdev_guid == guid) + return (vd); + } + } + + return (NULL); +} + +void +spa_upgrade(spa_t *spa, uint64_t version) +{ + ASSERT(spa_writeable(spa)); + + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + + /* + * This should only be called for a non-faulted pool, and since a + * future version would result in an unopenable pool, this shouldn't be + * possible. + */ + ASSERT(spa->spa_uberblock.ub_version <= SPA_VERSION); + ASSERT(version >= spa->spa_uberblock.ub_version); + + spa->spa_uberblock.ub_version = version; + vdev_config_dirty(spa->spa_root_vdev); + + spa_config_exit(spa, SCL_ALL, FTAG); + + txg_wait_synced(spa_get_dsl(spa), 0); +} + +boolean_t +spa_has_spare(spa_t *spa, uint64_t guid) +{ + int i; + uint64_t spareguid; + spa_aux_vdev_t *sav = &spa->spa_spares; + + for (i = 0; i < sav->sav_count; i++) + if (sav->sav_vdevs[i]->vdev_guid == guid) + return (B_TRUE); + + for (i = 0; i < sav->sav_npending; i++) { + if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, + &spareguid) == 0 && spareguid == guid) + return (B_TRUE); + } + + return (B_FALSE); +} + +/* + * Check if a pool has an active shared spare device. + * Note: reference count of an active spare is 2, as a spare and as a replace + */ +static boolean_t +spa_has_active_shared_spare(spa_t *spa) +{ + int i, refcnt; + uint64_t pool; + spa_aux_vdev_t *sav = &spa->spa_spares; + + for (i = 0; i < sav->sav_count; i++) { + if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, + &refcnt) && pool != 0ULL && pool == spa_guid(spa) && + refcnt > 2) + return (B_TRUE); + } + + return (B_FALSE); +} + +/* + * Post a sysevent corresponding to the given event. The 'name' must be one of + * the event definitions in sys/sysevent/eventdefs.h. The payload will be + * filled in from the spa and (optionally) the vdev. This doesn't do anything + * in the userland libzpool, as we don't want consumers to misinterpret ztest + * or zdb as real changes. + */ +void +spa_event_notify(spa_t *spa, vdev_t *vd, const char *name) +{ +#ifdef _KERNEL + sysevent_t *ev; + sysevent_attr_list_t *attr = NULL; + sysevent_value_t value; + sysevent_id_t eid; + + ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs", + SE_SLEEP); + + value.value_type = SE_DATA_TYPE_STRING; + value.value.sv_string = spa_name(spa); + if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0) + goto done; + + value.value_type = SE_DATA_TYPE_UINT64; + value.value.sv_uint64 = spa_guid(spa); + if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0) + goto done; + + if (vd) { + value.value_type = SE_DATA_TYPE_UINT64; + value.value.sv_uint64 = vd->vdev_guid; + if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value, + SE_SLEEP) != 0) + goto done; + + if (vd->vdev_path) { + value.value_type = SE_DATA_TYPE_STRING; + value.value.sv_string = vd->vdev_path; + if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH, + &value, SE_SLEEP) != 0) + goto done; + } + } + + if (sysevent_attach_attributes(ev, attr) != 0) + goto done; + attr = NULL; + + (void) log_sysevent(ev, SE_SLEEP, &eid); + +done: + if (attr) + sysevent_free_attr(attr); + sysevent_free(ev); +#endif +} |