X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fspa.c;h=12c24879b6197257c48390507c7c1aec7116bc75;hb=5853fe790d1df58c5dd85ea52c5e165b6d43013c;hp=fb1b96f8b811754e4f4d524977a629ce9f7834f3;hpb=172bb4bd5e4afef721dd4d2972d8680d983f144b;p=zfs.git diff --git a/module/zfs/spa.c b/module/zfs/spa.c index fb1b96f..12c2487 100644 --- a/module/zfs/spa.c +++ b/module/zfs/spa.c @@ -20,8 +20,9 @@ */ /* - * Copyright 2008 Sun Microsystems, Inc. All rights reserved. - * Use is subject to license terms. + * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright 2011 Nexenta Systems, Inc. All rights reserved. + * Copyright (c) 2012 by Delphix. All rights reserved. */ /* @@ -35,13 +36,15 @@ #include #include #include -#include #include #include #include #include +#include #include +#include #include +#include #include #include #include @@ -57,24 +60,83 @@ #include #include #include -#include #include +#include +#include +#include + +#ifdef _KERNEL +#include +#include +#include +#include +#include +#include +#endif /* _KERNEL */ #include "zfs_prop.h" #include "zfs_comutil.h" -int zio_taskq_threads[ZIO_TYPES][ZIO_TASKQ_TYPES] = { - /* ISSUE INTR */ - { 1, 1 }, /* ZIO_TYPE_NULL */ - { 1, 8 }, /* ZIO_TYPE_READ */ - { 8, 1 }, /* ZIO_TYPE_WRITE */ - { 1, 1 }, /* ZIO_TYPE_FREE */ - { 1, 1 }, /* ZIO_TYPE_CLAIM */ - { 1, 1 }, /* ZIO_TYPE_IOCTL */ +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] = { + "iss", "iss_h", "int", "int_h" +}; + +/* + * 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(16), ZTI_FIX(5) }, + { ZTI_FIX(8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, + { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, + { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, }; -static void spa_sync_props(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx); +static dsl_syncfunc_t spa_sync_version; +static dsl_syncfunc_t spa_sync_props; +static dsl_checkfunc_t spa_change_guid_check; +static dsl_syncfunc_t spa_change_guid_sync; static boolean_t spa_has_active_shared_spare(spa_t *spa); +static inline 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" /* * ========================================================================== @@ -92,7 +154,7 @@ spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, const char *propname = zpool_prop_to_name(prop); nvlist_t *propval; - VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); + VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_PUSHPAGE) == 0); VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0); if (strval != NULL) @@ -110,38 +172,77 @@ spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, static void spa_prop_get_config(spa_t *spa, nvlist_t **nvp) { - uint64_t size = spa_get_space(spa); - uint64_t used = spa_get_alloc(spa); + vdev_t *rvd = spa->spa_root_vdev; + dsl_pool_t *pool = spa->spa_dsl_pool; + uint64_t size; + uint64_t alloc; + uint64_t space; uint64_t cap, version; zprop_source_t src = ZPROP_SRC_NONE; spa_config_dirent_t *dp; + int c; ASSERT(MUTEX_HELD(&spa->spa_props_lock)); - /* - * readonly properties - */ - 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_USED, NULL, used, src); - spa_prop_add_list(*nvp, ZPOOL_PROP_AVAILABLE, NULL, size - used, src); + if (rvd != 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); + + space = 0; + for (c = 0; c < rvd->vdev_children; c++) { + vdev_t *tvd = rvd->vdev_child[c]; + space += tvd->vdev_max_asize - tvd->vdev_asize; + } + spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, space, + src); + + spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL, + (spa_mode(spa) == FREAD), src); - cap = (size == 0) ? 0 : (used * 100 / size); - spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, 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, + rvd->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); + } + + if (pool != NULL) { + dsl_dir_t *freedir = pool->dp_free_dir; + + /* + * The $FREE directory was introduced in SPA_VERSION_DEADLISTS, + * when opening pools before this version freedir will be NULL. + */ + if (freedir != NULL) { + spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL, + freedir->dd_phys->dd_used_bytes, src); + } else { + spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, + NULL, 0, src); + } + } spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src); - spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL, - spa->spa_root_vdev->vdev_state, src); - /* - * settable properties that are not stored in the pool property object. - */ - 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); + if (spa->spa_comment != NULL) { + spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment, + 0, ZPROP_SRC_LOCAL); + } if (spa->spa_root != NULL) spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root, @@ -164,12 +265,14 @@ spa_prop_get_config(spa_t *spa, nvlist_t **nvp) 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; - objset_t *mos = spa->spa_meta_objset; int err; - VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); + err = nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_PUSHPAGE); + if (err) + return err; mutex_enter(&spa->spa_props_lock); @@ -179,9 +282,9 @@ spa_prop_get(spa_t *spa, nvlist_t **nvp) spa_prop_get_config(spa, nvp); /* If no pool property object, no more prop to get. */ - if (spa->spa_pool_props_object == 0) { + if (mos == NULL || spa->spa_pool_props_object == 0) { mutex_exit(&spa->spa_props_lock); - return (0); + goto out; } /* @@ -211,15 +314,15 @@ spa_prop_get(spa_t *spa, nvlist_t **nvp) 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)) { + 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); + KM_PUSHPAGE); dsl_dataset_name(ds, strval); dsl_dataset_rele(ds, FTAG); rw_exit(&dp->dp_config_rwlock); @@ -238,7 +341,7 @@ spa_prop_get(spa_t *spa, nvlist_t **nvp) case 1: /* string property */ - strval = kmem_alloc(za.za_num_integers, KM_SLEEP); + strval = kmem_alloc(za.za_num_integers, KM_PUSHPAGE); err = zap_lookup(mos, spa->spa_pool_props_object, za.za_name, 1, za.za_num_integers, strval); if (err) { @@ -274,38 +377,74 @@ spa_prop_validate(spa_t *spa, nvlist_t *props) { nvpair_t *elem; int error = 0, reset_bootfs = 0; - uint64_t objnum; + uint64_t objnum = 0; + boolean_t has_feature = B_FALSE; 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; + char *strval, *slash, *check, *fname; + const char *propname = nvpair_name(elem); + zpool_prop_t prop = zpool_name_to_prop(propname); + + switch ((int)prop) { + case ZPROP_INVAL: + if (!zpool_prop_feature(propname)) { + error = EINVAL; + break; + } + + /* + * Sanitize the input. + */ + if (nvpair_type(elem) != DATA_TYPE_UINT64) { + error = EINVAL; + break; + } + + if (nvpair_value_uint64(elem, &intval) != 0) { + error = EINVAL; + break; + } + + if (intval != 0) { + error = EINVAL; + break; + } - propname = nvpair_name(elem); + fname = strchr(propname, '@') + 1; + if (zfeature_lookup_name(fname, NULL) != 0) { + error = EINVAL; + break; + } - if ((prop = zpool_name_to_prop(propname)) == ZPROP_INVAL) - return (EINVAL); + has_feature = B_TRUE; + break; - switch (prop) { case ZPOOL_PROP_VERSION: error = nvpair_value_uint64(elem, &intval); if (!error && - (intval < spa_version(spa) || intval > SPA_VERSION)) + (intval < spa_version(spa) || + intval > SPA_VERSION_BEFORE_FEATURES || + has_feature)) 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; @@ -324,6 +463,7 @@ spa_prop_validate(spa_t *spa, nvlist_t *props) error = nvpair_value_string(elem, &strval); if (!error) { + objset_t *os; uint64_t compress; if (strval == NULL || strval[0] == '\0') { @@ -332,12 +472,14 @@ spa_prop_validate(spa_t *spa, nvlist_t *props) break; } - if (error = dmu_objset_open(strval, DMU_OST_ZFS, - DS_MODE_USER | DS_MODE_READONLY, &os)) + if ((error = dmu_objset_hold(strval,FTAG,&os))) break; - /* We don't support gzip bootable datasets */ - if ((error = dsl_prop_get_integer(strval, + /* 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)) { @@ -345,7 +487,7 @@ spa_prop_validate(spa_t *spa, nvlist_t *props) } else { objnum = dmu_objset_id(os); } - dmu_objset_close(os); + dmu_objset_rele(os, FTAG); } break; @@ -393,6 +535,33 @@ spa_prop_validate(spa_t *spa, nvlist_t *props) strcmp(slash, "/..") == 0) error = EINVAL; break; + + case ZPOOL_PROP_COMMENT: + if ((error = nvpair_value_string(elem, &strval)) != 0) + break; + for (check = strval; *check != '\0'; check++) { + if (!isprint(*check)) { + error = EINVAL; + break; + } + check++; + } + if (strlen(strval) > ZPROP_MAX_COMMENT) + error = E2BIG; + 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; + + default: + break; } if (error) @@ -412,16 +581,87 @@ spa_prop_validate(spa_t *spa, nvlist_t *props) 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_PUSHPAGE); + + 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 = NULL; + boolean_t need_sync = B_FALSE; if ((error = spa_prop_validate(spa, nvp)) != 0) return (error); - return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_sync_props, - spa, nvp, 3)); + while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) { + zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem)); + + if (prop == ZPOOL_PROP_CACHEFILE || + prop == ZPOOL_PROP_ALTROOT || + prop == ZPOOL_PROP_READONLY) + continue; + + if (prop == ZPOOL_PROP_VERSION || prop == ZPROP_INVAL) { + uint64_t ver; + + if (prop == ZPOOL_PROP_VERSION) { + VERIFY(nvpair_value_uint64(elem, &ver) == 0); + } else { + ASSERT(zpool_prop_feature(nvpair_name(elem))); + ver = SPA_VERSION_FEATURES; + need_sync = B_TRUE; + } + + /* Save time if the version is already set. */ + if (ver == spa_version(spa)) + continue; + + /* + * In addition to the pool directory object, we might + * create the pool properties object, the features for + * read object, the features for write object, or the + * feature descriptions object. + */ + error = dsl_sync_task_do(spa_get_dsl(spa), NULL, + spa_sync_version, spa, &ver, 6); + if (error) + return (error); + continue; + } + + need_sync = B_TRUE; + break; + } + + if (need_sync) { + return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_sync_props, + spa, nvp, 6)); + } + + return (0); } /* @@ -438,6 +678,78 @@ spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) } } +/*ARGSUSED*/ +static int +spa_change_guid_check(void *arg1, void *arg2, dmu_tx_t *tx) +{ + spa_t *spa = arg1; + vdev_t *rvd = spa->spa_root_vdev; + uint64_t vdev_state; + ASSERTV(uint64_t *newguid = arg2); + + spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); + vdev_state = rvd->vdev_state; + spa_config_exit(spa, SCL_STATE, FTAG); + + if (vdev_state != VDEV_STATE_HEALTHY) + return (ENXIO); + + ASSERT3U(spa_guid(spa), !=, *newguid); + + return (0); +} + +static void +spa_change_guid_sync(void *arg1, void *arg2, dmu_tx_t *tx) +{ + spa_t *spa = arg1; + uint64_t *newguid = arg2; + uint64_t oldguid; + vdev_t *rvd = spa->spa_root_vdev; + + oldguid = spa_guid(spa); + + spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); + rvd->vdev_guid = *newguid; + rvd->vdev_guid_sum += (*newguid - oldguid); + vdev_config_dirty(rvd); + spa_config_exit(spa, SCL_STATE, FTAG); + + spa_history_log_internal(LOG_POOL_GUID_CHANGE, spa, tx, + "old=%lld new=%lld", oldguid, *newguid); +} + +/* + * Change the GUID for the pool. This is done so that we can later + * re-import a pool built from a clone of our own vdevs. We will modify + * the root vdev's guid, our own pool guid, and then mark all of our + * vdevs dirty. Note that we must make sure that all our vdevs are + * online when we do this, or else any vdevs that weren't present + * would be orphaned from our pool. We are also going to issue a + * sysevent to update any watchers. + */ +int +spa_change_guid(spa_t *spa) +{ + int error; + uint64_t guid; + + mutex_enter(&spa_namespace_lock); + guid = spa_generate_guid(NULL); + + error = dsl_sync_task_do(spa_get_dsl(spa), spa_change_guid_check, + spa_change_guid_sync, spa, &guid, 5); + + if (error == 0) { + spa_config_sync(spa, B_FALSE, B_TRUE); + spa_event_notify(spa, NULL, FM_EREPORT_ZFS_POOL_REGUID); + } + + mutex_exit(&spa_namespace_lock); + + return (error); +} + /* * ========================================================================== * SPA state manipulation (open/create/destroy/import/export) @@ -482,26 +794,189 @@ spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) 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) +{ + int t, q; + + for (t = 0; t < ZIO_TYPES; t++) { + for (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); + } + } +} + +#if defined(_KERNEL) && defined(HAVE_SPA_THREAD) +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) +spa_activate(spa_t *spa, int mode) { ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); spa->spa_state = POOL_STATE_ACTIVE; - - spa->spa_normal_class = metaslab_class_create(); - spa->spa_log_class = metaslab_class_create(); - - for (int t = 0; t < ZIO_TYPES; t++) { - for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { - spa->spa_zio_taskq[t][q] = taskq_create("spa_zio", - zio_taskq_threads[t][q], maxclsyspri, 50, - INT_MAX, TASKQ_PREPOPULATE); + 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; + +#ifdef HAVE_SPA_THREAD + /* 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 } } +#endif /* HAVE_SPA_THREAD */ + 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)); @@ -525,10 +1000,12 @@ spa_activate(spa_t *spa) static void spa_deactivate(spa_t *spa) { + int t, q; + 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); @@ -536,9 +1013,12 @@ spa_deactivate(spa_t *spa) 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++) { - taskq_destroy(spa->spa_zio_taskq[t][q]); + taskq_cancel_id(system_taskq, spa->spa_deadman_tqid); + + for (t = 0; t < ZIO_TYPES; t++) { + for (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; } } @@ -559,6 +1039,31 @@ spa_deactivate(spa_t *spa) 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; + } } /* @@ -572,8 +1077,9 @@ 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 c, children; + uint_t children; int error; + int c; if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) return (error); @@ -634,15 +1140,12 @@ spa_unload(spa_t *spa) /* * Wait for any outstanding async I/O to complete. */ - mutex_enter(&spa->spa_async_root_lock); - while (spa->spa_async_root_count != 0) - cv_wait(&spa->spa_async_root_cv, &spa->spa_async_root_lock); - mutex_exit(&spa->spa_async_root_lock); + if (spa->spa_async_zio_root != NULL) { + (void) zio_wait(spa->spa_async_zio_root); + spa->spa_async_zio_root = NULL; + } - /* - * Drop and purge level 2 cache - */ - spa_l2cache_drop(spa); + bpobj_close(&spa->spa_deferred_bpobj); /* * Close the dsl pool. @@ -650,8 +1153,18 @@ spa_unload(spa_t *spa) 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. */ @@ -672,8 +1185,10 @@ spa_unload(spa_t *spa) } spa->spa_spares.sav_count = 0; - for (i = 0; i < spa->spa_l2cache.sav_count; i++) + for (i = 0; i < spa->spa_l2cache.sav_count; i++) { + vdev_clear_stats(spa->spa_l2cache.sav_vdevs[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 *)); @@ -686,6 +1201,13 @@ spa_unload(spa_t *spa) spa->spa_l2cache.sav_count = 0; spa->spa_async_suspended = 0; + + if (spa->spa_comment != NULL) { + spa_strfree(spa->spa_comment); + spa->spa_comment = NULL; + } + + spa_config_exit(spa, SCL_ALL, FTAG); } /* @@ -744,7 +1266,7 @@ spa_load_spares(spa_t *spa) * active configuration, then we also mark this vdev as an active spare. */ spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), - KM_SLEEP); + KM_PUSHPAGE); for (i = 0; i < spa->spa_spares.sav_count; i++) { VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, VDEV_ALLOC_SPARE) == 0); @@ -775,6 +1297,7 @@ spa_load_spares(spa_t *spa) } vd->vdev_top = vd; + vd->vdev_aux = &spa->spa_spares; if (vdev_open(vd) != 0) continue; @@ -791,10 +1314,10 @@ spa_load_spares(spa_t *spa) DATA_TYPE_NVLIST_ARRAY) == 0); spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), - KM_SLEEP); + KM_PUSHPAGE); for (i = 0; i < spa->spa_spares.sav_count; i++) spares[i] = vdev_config_generate(spa, - spa->spa_spares.sav_vdevs[i], B_TRUE, B_TRUE, B_FALSE); + 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++) @@ -816,8 +1339,8 @@ spa_load_l2cache(spa_t *spa) nvlist_t **l2cache; uint_t nl2cache; int i, j, oldnvdevs; - uint64_t guid, size; - vdev_t *vd, **oldvdevs, **newvdevs; + uint64_t guid; + vdev_t *vd, **oldvdevs, **newvdevs = NULL; spa_aux_vdev_t *sav = &spa->spa_l2cache; ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); @@ -825,7 +1348,7 @@ spa_load_l2cache(spa_t *spa) 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); + newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_PUSHPAGE); } else { nl2cache = 0; } @@ -880,12 +1403,8 @@ spa_load_l2cache(spa_t *spa) (void) vdev_validate_aux(vd); - if (!vdev_is_dead(vd)) { - size = vdev_get_rsize(vd); - l2arc_add_vdev(spa, vd, - VDEV_LABEL_START_SIZE, - size - VDEV_LABEL_START_SIZE); - } + if (!vdev_is_dead(vd)) + l2arc_add_vdev(spa, vd); } } @@ -897,14 +1416,13 @@ spa_load_l2cache(spa_t *spa) vd = oldvdevs[i]; if (vd != NULL) { - if ((spa_mode & FWRITE) && - spa_l2cache_exists(vd->vdev_guid, &pool) && - pool != 0ULL && - l2arc_vdev_present(vd)) { + ASSERT(vd->vdev_isl2cache); + + 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); + vdev_clear_stats(vd); + vdev_free(vd); } } @@ -924,10 +1442,10 @@ spa_load_l2cache(spa_t *spa) VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); - l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); + l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_PUSHPAGE); for (i = 0; i < sav->sav_count; i++) l2cache[i] = vdev_config_generate(spa, - sav->sav_vdevs[i], B_TRUE, B_FALSE, B_TRUE); + 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: @@ -946,12 +1464,16 @@ load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) int error; *value = NULL; - VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); + error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db); + if (error) + return (error); + 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); + packed = kmem_alloc(nvsize, KM_PUSHPAGE | KM_NODEBUG); + 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); @@ -972,70 +1494,468 @@ spa_check_removed(vdev_t *vd) 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); + zfs_ereport_post(FM_EREPORT_RESOURCE_AUTOREPLACE, + vd->vdev_spa, vd, NULL, 0, 0); + spa_event_notify(vd->vdev_spa, vd, FM_EREPORT_ZFS_DEVICE_CHECK); } } /* - * Check for missing log devices + * Validate the current config against the MOS config */ -int -spa_check_logs(spa_t *spa) +static boolean_t +spa_config_valid(spa_t *spa, nvlist_t *config) +{ + vdev_t *mrvd, *rvd = spa->spa_root_vdev; + nvlist_t *nv; + int c, i; + + 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_PUSHPAGE); + VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_PUSHPAGE) == 0); + + for (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 (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 (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) { + default: + break; 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->spa_log_state = SPA_LOG_MISSING; + spa_set_log_state(spa, SPA_LOG_MISSING); return (1); } break; + } + return (0); +} - case SPA_LOG_CLEAR: - (void) dmu_objset_find(spa->spa_name, zil_clear_log_chain, NULL, - DS_FIND_CHILDREN); - break; +static boolean_t +spa_passivate_log(spa_t *spa) +{ + vdev_t *rvd = spa->spa_root_vdev; + boolean_t slog_found = B_FALSE; + int c; + + ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); + + if (!spa_has_slogs(spa)) + return (B_FALSE); + + for (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; + int c; + + ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); + + for (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) +{ + int i; + + for (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_IS_METADATA(type)) && + 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)); } - spa->spa_log_state = SPA_LOG_GOOD; 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); +} + /* - * Load an existing storage pool, using the pool's builtin spa_config as a - * source of configuration information. + * 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_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) +spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) { - int error = 0; - nvlist_t *nvroot = NULL; - vdev_t *rvd; - uberblock_t *ub = &spa->spa_uberblock; - uint64_t config_cache_txg = spa->spa_config_txg; - uint64_t pool_guid; - uint64_t version; - uint64_t autoreplace = 0; - char *ereport = FM_EREPORT_ZFS_POOL; + return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, + name, sizeof (uint64_t), 1, val)); +} - ASSERT(MUTEX_HELD(&spa_namespace_lock)); +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); +} - spa->spa_load_state = state; +/* + * 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; - if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || - nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) { - error = EINVAL; - goto out; + /* 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_PUSHPAGE); + + /* 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; + char *comment; + int error; + uint64_t pool_guid; + nvlist_t *nvl; + + if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) + return (EINVAL); + + ASSERT(spa->spa_comment == NULL); + if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) + spa->spa_comment = spa_strdup(comment); + + /* * 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, &version) != 0) - version = SPA_VERSION_INITIAL; + 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); @@ -1043,10 +1963,82 @@ spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && spa_guid_exists(pool_guid, 0)) { error = EEXIST; - goto out; + } else { + spa->spa_config_guid = pool_guid; + + if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, + &nvl) == 0) { + VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting, + KM_PUSHPAGE) == 0); + } + + nvlist_free(spa->spa_load_info); + spa->spa_load_info = fnvlist_alloc(); + + 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); +} - spa->spa_load_guid = pool_guid; +/* + * Load an existing storage pool, using the pool's builtin spa_config as a + * source of configuration information. + */ +__attribute__((always_inline)) +static inline 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; + nvlist_t *label; + 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; + boolean_t missing_feat_write = B_FALSE; + + /* + * 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 @@ -1054,15 +2046,17 @@ spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) * configuration requires knowing the version number. */ spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - spa->spa_ubsync.ub_version = version; - error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_LOAD); + error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); spa_config_exit(spa, SCL_ALL, FTAG); if (error != 0) - goto out; + return (error); ASSERT(spa->spa_root_vdev == rvd); - ASSERT(spa_guid(spa) == pool_guid); + + if (type != SPA_IMPORT_ASSEMBLE) { + ASSERT(spa_guid(spa) == pool_guid); + } /* * Try to open all vdevs, loading each label in the process. @@ -1071,58 +2065,128 @@ spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) error = vdev_open(rvd); spa_config_exit(spa, SCL_ALL, FTAG); if (error != 0) - goto out; + return (error); /* - * Validate the labels for all leaf vdevs. We need to grab the config - * lock because all label I/O is done with ZIO_FLAG_CONFIG_WRITER. + * 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. */ - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - error = vdev_validate(rvd); - spa_config_exit(spa, SCL_ALL, FTAG); + if (type != SPA_IMPORT_ASSEMBLE) { + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); + error = vdev_validate(rvd, mosconfig); + spa_config_exit(spa, SCL_ALL, FTAG); - if (error != 0) - goto out; + if (error != 0) + return (error); - if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { - error = ENXIO; - goto out; + if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) + return (ENXIO); } /* * Find the best uberblock. */ - vdev_uberblock_load(NULL, rvd, ub); + vdev_uberblock_load(rvd, ub, &label); /* * If we weren't able to find a single valid uberblock, return failure. */ if (ub->ub_txg == 0) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = ENXIO; - goto out; + nvlist_free(label); + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); } /* - * If the pool is newer than the code, we can't open it. + * If the pool has an unsupported version we can't open it. */ - if (ub->ub_version > SPA_VERSION) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_VERSION_NEWER); - error = ENOTSUP; - goto out; + if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { + nvlist_free(label); + return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); + } + + if (ub->ub_version >= SPA_VERSION_FEATURES) { + nvlist_t *features; + + /* + * If we weren't able to find what's necessary for reading the + * MOS in the label, return failure. + */ + if (label == NULL || nvlist_lookup_nvlist(label, + ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) { + nvlist_free(label); + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, + ENXIO)); + } + + /* + * Update our in-core representation with the definitive values + * from the label. + */ + nvlist_free(spa->spa_label_features); + VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); + } + + nvlist_free(label); + + /* + * Look through entries in the label nvlist's features_for_read. If + * there is a feature listed there which we don't understand then we + * cannot open a pool. + */ + if (ub->ub_version >= SPA_VERSION_FEATURES) { + nvlist_t *unsup_feat; + nvpair_t *nvp; + + VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == + 0); + + for (nvp = nvlist_next_nvpair(spa->spa_label_features, NULL); + nvp != NULL; + nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { + if (!zfeature_is_supported(nvpair_name(nvp))) { + VERIFY(nvlist_add_string(unsup_feat, + nvpair_name(nvp), "") == 0); + } + } + + if (!nvlist_empty(unsup_feat)) { + VERIFY(nvlist_add_nvlist(spa->spa_load_info, + ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); + nvlist_free(unsup_feat); + return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, + ENOTSUP)); + } + + nvlist_free(unsup_feat); } /* * If the vdev guid sum doesn't match the uberblock, we have an - * incomplete configuration. + * 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 (rvd->vdev_guid_sum != ub->ub_guid_sum && mosconfig) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_BAD_GUID_SUM); - error = ENXIO; - goto out; + 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; } /* @@ -1130,219 +2194,257 @@ spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) */ spa->spa_state = POOL_STATE_ACTIVE; spa->spa_ubsync = spa->spa_uberblock; - spa->spa_first_txg = spa_last_synced_txg(spa) + 1; - error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool); - if (error) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - goto out; - } + 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_init(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 (zap_lookup(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, - sizeof (uint64_t), 1, &spa->spa_config_object) != 0) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; + if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + + if (spa_version(spa) >= SPA_VERSION_FEATURES) { + boolean_t missing_feat_read = B_FALSE; + nvlist_t *unsup_feat, *enabled_feat; + + if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, + &spa->spa_feat_for_read_obj) != 0) { + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + } + + if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, + &spa->spa_feat_for_write_obj) != 0) { + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + } + + if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, + &spa->spa_feat_desc_obj) != 0) { + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + } + + enabled_feat = fnvlist_alloc(); + unsup_feat = fnvlist_alloc(); + + if (!feature_is_supported(spa->spa_meta_objset, + spa->spa_feat_for_read_obj, spa->spa_feat_desc_obj, + unsup_feat, enabled_feat)) + missing_feat_read = B_TRUE; + + if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) { + if (!feature_is_supported(spa->spa_meta_objset, + spa->spa_feat_for_write_obj, spa->spa_feat_desc_obj, + unsup_feat, enabled_feat)) { + missing_feat_write = B_TRUE; + } + } + + fnvlist_add_nvlist(spa->spa_load_info, + ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); + + if (!nvlist_empty(unsup_feat)) { + fnvlist_add_nvlist(spa->spa_load_info, + ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); + } + + fnvlist_free(enabled_feat); + fnvlist_free(unsup_feat); + + if (!missing_feat_read) { + fnvlist_add_boolean(spa->spa_load_info, + ZPOOL_CONFIG_CAN_RDONLY); + } + + /* + * If the state is SPA_LOAD_TRYIMPORT, our objective is + * twofold: to determine whether the pool is available for + * import in read-write mode and (if it is not) whether the + * pool is available for import in read-only mode. If the pool + * is available for import in read-write mode, it is displayed + * as available in userland; if it is not available for import + * in read-only mode, it is displayed as unavailable in + * userland. If the pool is available for import in read-only + * mode but not read-write mode, it is displayed as unavailable + * in userland with a special note that the pool is actually + * available for open in read-only mode. + * + * As a result, if the state is SPA_LOAD_TRYIMPORT and we are + * missing a feature for write, we must first determine whether + * the pool can be opened read-only before returning to + * userland in order to know whether to display the + * abovementioned note. + */ + if (missing_feat_read || (missing_feat_write && + spa_writeable(spa))) { + return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, + ENOTSUP)); + } } + spa->spa_is_initializing = B_TRUE; + error = dsl_pool_open(spa->spa_dsl_pool); + spa->spa_is_initializing = B_FALSE; + if (error != 0) + return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); + if (!mosconfig) { - nvlist_t *newconfig; uint64_t hostid; + nvlist_t *policy = NULL, *nvconfig; - if (load_nvlist(spa, spa->spa_config_object, &newconfig) != 0) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; - } + 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(newconfig, + if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, ZPOOL_CONFIG_HOSTID, &hostid) == 0) { char *hostname; unsigned long myhostid = 0; - VERIFY(nvlist_lookup_string(newconfig, + 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 && - (unsigned long)hostid != myhostid) { + 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", + "See: http://zfsonlinux.org/msg/ZFS-8000-EY", spa_name(spa), hostname, (unsigned long)hostid); - error = EBADF; - goto out; + 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, newconfig); + spa_config_set(spa, nvconfig); spa_unload(spa); spa_deactivate(spa); - spa_activate(spa); + spa_activate(spa, orig_mode); - return (spa_load(spa, newconfig, state, B_TRUE)); + return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); } - if (zap_lookup(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, - sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj) != 0) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; - } + 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 = zap_lookup(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, - sizeof (uint64_t), 1, &spa->spa_deflate); - if (error != 0 && error != ENOENT) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; - } + 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 = zap_lookup(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_LAST, - sizeof (uint64_t), 1, &spa->spa_errlog_last); - if (error != 0 && error != ENOENT) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; - } + 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 = zap_lookup(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_SCRUB, - sizeof (uint64_t), 1, &spa->spa_errlog_scrub); - if (error != 0 && error != ENOENT) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; - } + 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 = zap_lookup(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_HISTORY, - sizeof (uint64_t), 1, &spa->spa_history); - if (error != 0 && error != ENOENT) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; - } + 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 = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, - DMU_POOL_SPARES, sizeof (uint64_t), 1, &spa->spa_spares.sav_object); - if (error != 0 && error != ENOENT) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; - } - if (error == 0) { + 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) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; - } + &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 = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, - DMU_POOL_L2CACHE, sizeof (uint64_t), 1, + error = spa_dir_prop(spa, DMU_POOL_L2CACHE, &spa->spa_l2cache.sav_object); - if (error != 0 && error != ENOENT) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; - } - if (error == 0) { + 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) { - vdev_set_state(rvd, B_TRUE, - VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; - } + &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; } - if (spa_check_logs(spa)) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_BAD_LOG); - error = ENXIO; - ereport = FM_EREPORT_ZFS_LOG_REPLAY; - goto out; - } - - spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); - error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, - DMU_POOL_PROPS, sizeof (uint64_t), 1, &spa->spa_pool_props_object); - - if (error && error != ENOENT) { - vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - error = EIO; - goto out; - } + 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) { - (void) zap_lookup(spa->spa_meta_objset, - spa->spa_pool_props_object, - zpool_prop_to_name(ZPOOL_PROP_BOOTFS), - sizeof (uint64_t), 1, &spa->spa_bootfs); - (void) zap_lookup(spa->spa_meta_objset, - spa->spa_pool_props_object, - zpool_prop_to_name(ZPOOL_PROP_AUTOREPLACE), - sizeof (uint64_t), 1, &autoreplace); - (void) zap_lookup(spa->spa_meta_objset, - spa->spa_pool_props_object, - zpool_prop_to_name(ZPOOL_PROP_DELEGATION), - sizeof (uint64_t), 1, &spa->spa_delegation); - (void) zap_lookup(spa->spa_meta_objset, - spa->spa_pool_props_object, - zpool_prop_to_name(ZPOOL_PROP_FAILUREMODE), - sizeof (uint64_t), 1, &spa->spa_failmode); + 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); } /* @@ -1352,8 +2454,18 @@ spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) * unopenable vdevs so that the normal autoreplace handler can take * over. */ - if (autoreplace && state != SPA_LOAD_TRYIMPORT) + 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. @@ -1368,43 +2480,118 @@ spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) spa_config_exit(spa, SCL_ALL, FTAG); /* - * Check the state of the root vdev. If it can't be opened, it - * indicates one or more toplevel vdevs are faulted. + * Load the DDTs (dedup tables). */ - if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { - error = ENXIO; - goto out; + 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 validated 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)); + } + } + + if (missing_feat_write) { + ASSERT(state == SPA_LOAD_TRYIMPORT); + + /* + * At this point, we know that we can open the pool in + * read-only mode but not read-write mode. We now have enough + * information and can return to userland. + */ + return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP)); + } + + /* + * 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_mode & FWRITE) && state != SPA_LOAD_TRYIMPORT) { + if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER || + spa->spa_load_max_txg == UINT64_MAX)) { dmu_tx_t *tx; int need_update = B_FALSE; int c; + 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. + * 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, 0); + 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_IMPORT || + state == SPA_LOAD_RECOVER || + (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) need_update = B_TRUE; for (c = 0; c < rvd->vdev_children; c++) @@ -1417,17 +2604,134 @@ spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) */ 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); } - error = 0; -out: - spa->spa_minref = refcount_count(&spa->spa_refcount); - if (error && error != EBADF) - zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0); - spa->spa_load_state = SPA_LOAD_NONE; - spa->spa_ena = 0; + return (0); +} - return (error); +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)); +} + +/* + * If spa_load() fails this function will try loading prior txg's. If + * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool + * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this + * function will not rewind the pool and will return the same error as + * spa_load(). + */ +static int +spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig, + uint64_t max_request, int rewind_flags) +{ + nvlist_t *loadinfo = NULL; + 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); + } + + if (state == SPA_LOAD_RECOVER) { + /* Price of rolling back is discarding txgs, including log */ + spa_set_log_state(spa, SPA_LOG_CLEAR); + } else { + /* + * If we aren't rolling back save the load info from our first + * import attempt so that we can restore it after attempting + * to rewind. + */ + loadinfo = spa->spa_load_info; + spa->spa_load_info = fnvlist_alloc(); + } + + 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); + + if (state == SPA_LOAD_RECOVER) { + ASSERT3P(loadinfo, ==, NULL); + return (rewind_error); + } else { + /* Store the rewind info as part of the initial load info */ + fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, + spa->spa_load_info); + + /* Restore the initial load info */ + fnvlist_free(spa->spa_load_info); + spa->spa_load_info = loadinfo; + + return (load_error); + } } /* @@ -1443,9 +2747,11 @@ out: * ambiguous state. */ static int -spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config) +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; @@ -1467,11 +2773,22 @@ spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config) 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_activate(spa, spa_mode_global); - error = spa_load(spa, spa->spa_config, SPA_LOAD_OPEN, B_FALSE); + 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) { /* @@ -1496,38 +2813,60 @@ spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config) * information: the state of each vdev after the * attempted vdev_open(). Return this to the user. */ - if (config != NULL && spa->spa_root_vdev != NULL) - *config = spa_config_generate(spa, NULL, -1ULL, - B_TRUE); + if (config != NULL && spa->spa_config) { + VERIFY(nvlist_dup(spa->spa_config, config, + KM_PUSHPAGE) == 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 = B_TRUE; + spa->spa_last_open_failed = error; if (locked) mutex_exit(&spa_namespace_lock); *spapp = NULL; return (error); - } else { - spa->spa_last_open_failed = B_FALSE; } } spa_open_ref(spa, tag); - if (locked) + 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; - if (config != NULL) - *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); - 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)); + return (spa_open_common(name, spapp, tag, NULL, NULL)); } /* @@ -1572,6 +2911,8 @@ spa_add_spares(spa_t *spa, nvlist_t *config) uint_t vsc; uint64_t pool; + ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); + if (spa->spa_spares.sav_count == 0) return; @@ -1596,7 +2937,7 @@ spa_add_spares(spa_t *spa, nvlist_t *config) if (spa_spare_exists(guid, &pool, NULL) && pool != 0ULL) { VERIFY(nvlist_lookup_uint64_array( - spares[i], ZPOOL_CONFIG_STATS, + spares[i], ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) == 0); vs->vs_state = VDEV_STATE_CANT_OPEN; vs->vs_aux = VDEV_AUX_SPARED; @@ -1619,11 +2960,11 @@ spa_add_l2cache(spa_t *spa, nvlist_t *config) vdev_stat_t *vs; uint_t vsc; + ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); + if (spa->spa_l2cache.sav_count == 0) return; - spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); - VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, @@ -1653,33 +2994,93 @@ spa_add_l2cache(spa_t *spa, nvlist_t *config) ASSERT(vd != NULL); VERIFY(nvlist_lookup_uint64_array(l2cache[i], - ZPOOL_CONFIG_STATS, (uint64_t **)&vs, &vsc) == 0); + ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) + == 0); vdev_get_stats(vd, vs); } } +} - spa_config_exit(spa, SCL_CONFIG, FTAG); +static void +spa_add_feature_stats(spa_t *spa, nvlist_t *config) +{ + nvlist_t *features; + zap_cursor_t zc; + zap_attribute_t za; + + ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); + VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); + + if (spa->spa_feat_for_read_obj != 0) { + for (zap_cursor_init(&zc, spa->spa_meta_objset, + spa->spa_feat_for_read_obj); + zap_cursor_retrieve(&zc, &za) == 0; + zap_cursor_advance(&zc)) { + ASSERT(za.za_integer_length == sizeof (uint64_t) && + za.za_num_integers == 1); + VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, + za.za_first_integer)); + } + zap_cursor_fini(&zc); + } + + if (spa->spa_feat_for_write_obj != 0) { + for (zap_cursor_init(&zc, spa->spa_meta_objset, + spa->spa_feat_for_write_obj); + zap_cursor_retrieve(&zc, &za) == 0; + zap_cursor_advance(&zc)) { + ASSERT(za.za_integer_length == sizeof (uint64_t) && + za.za_num_integers == 1); + VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, + za.za_first_integer)); + } + zap_cursor_fini(&zc); + } + + VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, + features) == 0); + nvlist_free(features); } int -spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen) +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, config); + 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 (spa && *config != NULL) { - VERIFY(nvlist_add_uint64(*config, ZPOOL_CONFIG_ERRCOUNT, - spa_get_errlog_size(spa)) == 0); + 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); - if (spa_suspended(spa)) VERIFY(nvlist_add_uint64(*config, - ZPOOL_CONFIG_SUSPENDED, spa->spa_failmode) == 0); + 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); + spa_add_spares(spa, *config); + spa_add_l2cache(spa, *config); + spa_add_feature_stats(spa, *config); + } } /* @@ -1701,8 +3102,10 @@ spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen) } } - if (spa != NULL) + if (spa != NULL) { + spa_config_exit(spa, SCL_CONFIG, FTAG); spa_close(spa, FTAG); + } return (error); } @@ -1767,6 +3170,7 @@ spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) && strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) { error = ENOTBLK; + vdev_free(vd); goto out; } #endif @@ -1830,13 +3234,13 @@ spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, &olddevs, &oldndevs) == 0); newdevs = kmem_alloc(sizeof (void *) * - (ndevs + oldndevs), KM_SLEEP); + (ndevs + oldndevs), KM_PUSHPAGE); for (i = 0; i < oldndevs; i++) VERIFY(nvlist_dup(olddevs[i], &newdevs[i], - KM_SLEEP) == 0); + KM_PUSHPAGE) == 0); for (i = 0; i < ndevs; i++) VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], - KM_SLEEP) == 0); + KM_PUSHPAGE) == 0); VERIFY(nvlist_remove(sav->sav_config, config, DATA_TYPE_NVLIST_ARRAY) == 0); @@ -1851,7 +3255,7 @@ spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, * Generate a new dev list. */ VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, - KM_SLEEP) == 0); + KM_PUSHPAGE) == 0); VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, devs, ndevs) == 0); } @@ -1873,15 +3277,9 @@ spa_l2cache_drop(spa_t *spa) vd = sav->sav_vdevs[i]; ASSERT(vd != NULL); - if ((spa_mode & FWRITE) && - spa_l2cache_exists(vd->vdev_guid, &pool) && pool != 0ULL && - l2arc_vdev_present(vd)) { + 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); } } @@ -1897,11 +3295,14 @@ spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, vdev_t *rvd; dsl_pool_t *dp; dmu_tx_t *tx; - int c, error = 0; + int error = 0; uint64_t txg = TXG_INITIAL; nvlist_t **spares, **l2cache; uint_t nspares, nl2cache; - uint64_t version; + uint64_t version, obj; + boolean_t has_features; + nvpair_t *elem; + int c; /* * If this pool already exists, return failure. @@ -1917,27 +3318,41 @@ spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, */ (void) nvlist_lookup_string(props, zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); - spa = spa_add(pool, altroot); - spa_activate(spa); - - spa->spa_uberblock.ub_txg = txg - 1; + spa = spa_add(pool, NULL, altroot); + spa_activate(spa, spa_mode_global); if (props && (error = spa_prop_validate(spa, props))) { - spa_unload(spa); 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) + has_features = B_FALSE; + for (elem = nvlist_next_nvpair(props, NULL); + elem != NULL; elem = nvlist_next_nvpair(props, elem)) { + if (zpool_prop_feature(nvpair_name(elem))) + has_features = B_TRUE; + } + + if (has_features || nvlist_lookup_uint64(props, + zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { version = SPA_VERSION; - ASSERT(version <= SPA_VERSION); + } + ASSERT(SPA_VERSION_IS_SUPPORTED(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); @@ -1954,9 +3369,10 @@ spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, (error = vdev_create(rvd, txg, B_FALSE)) == 0 && (error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) == 0) { - for (c = 0; c < rvd->vdev_children; c++) - vdev_init(rvd->vdev_child[c], txg); - vdev_config_dirty(rvd); + for (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); @@ -1975,7 +3391,7 @@ spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 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); + KM_PUSHPAGE) == 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); @@ -1990,7 +3406,7 @@ spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 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); + NV_UNIQUE_NAME, KM_PUSHPAGE) == 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); @@ -1999,8 +3415,17 @@ spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, spa->spa_l2cache.sav_sync = B_TRUE; } + spa->spa_is_initializing = B_TRUE; spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg); spa->spa_meta_objset = dp->dp_meta_objset; + spa->spa_is_initializing = B_FALSE; + + /* + * Create DDTs (dedup tables). + */ + ddt_create(spa); + + spa_update_dspace(spa); tx = dmu_tx_create_assigned(dp, txg); @@ -2017,6 +3442,15 @@ spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, cmn_err(CE_PANIC, "failed to add pool config"); } + if (spa_version(spa) >= SPA_VERSION_FEATURES) + spa_feature_create_zap_objects(spa, tx); + + 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; @@ -2028,70 +3462,283 @@ spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, } /* - * Create the deferred-free bplist object. Turn off compression - * because sync-to-convergence takes longer if the blocksize - * keeps changing. + * 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_PUSHPAGE) == 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) +{ + int c; + + for (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. */ - spa->spa_sync_bplist_obj = bplist_create(spa->spa_meta_objset, - 1 << 14, tx); - dmu_object_set_compress(spa->spa_meta_objset, spa->spa_sync_bplist_obj, - ZIO_COMPRESS_OFF, tx); + 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, "Cannot read the pool label from '%s'", + devpath); + return (EIO); + } - if (zap_add(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, - sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj, tx) != 0) { - cmn_err(CE_PANIC, "failed to add bplist"); + 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; + /* - * Create the pool's history object. + * Build up a vdev tree based on the boot device's label config. */ - if (version >= SPA_VERSION_ZPOOL_HISTORY) - spa_history_create_obj(spa, tx); + 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); + } /* - * Set pool properties. + * Get the boot vdev. */ - 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); - if (props) - spa_sync_props(spa, props, CRED(), tx); - - dmu_tx_commit(tx); - - spa->spa_sync_on = B_TRUE; - txg_sync_start(spa->spa_dsl_pool); + 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; + } /* - * We explicitly wait for the first transaction to complete so that our - * bean counters are appropriately updated. + * Determine if there is a better boot device. */ - txg_wait_synced(spa->spa_dsl_pool, txg); - - spa_config_sync(spa, B_FALSE, B_TRUE); + 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 (version >= SPA_VERSION_ZPOOL_HISTORY && history_str != NULL) - (void) spa_history_log(spa, history_str, LOG_CMD_POOL_CREATE); + /* + * 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); - spa->spa_minref = refcount_count(&spa->spa_refcount); - - return (0); + nvlist_free(config); + return (error); } +#endif + /* - * Import the given pool into the system. We set up the necessary spa_t and - * then call spa_load() to do the dirty work. + * Import a non-root pool into the system. */ -static int -spa_import_common(const char *pool, nvlist_t *config, nvlist_t *props, - boolean_t isroot, boolean_t allowfaulted) +int +spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) { spa_t *spa; char *altroot = NULL; - int error, loaderr; + 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; @@ -2100,19 +3747,9 @@ spa_import_common(const char *pool, nvlist_t *config, nvlist_t *props, * If a pool with this name exists, return failure. */ mutex_enter(&spa_namespace_lock); - if ((spa = spa_lookup(pool)) != NULL) { - if (isroot) { - /* - * Remove the existing root pool from the - * namespace so that we can replace it with - * the correct config we just read in. - */ - ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); - spa_remove(spa); - } else { - mutex_exit(&spa_namespace_lock); - return (EEXIST); - } + if (spa_lookup(pool) != NULL) { + mutex_exit(&spa_namespace_lock); + return (EEXIST); } /* @@ -2120,32 +3757,69 @@ spa_import_common(const char *pool, nvlist_t *config, nvlist_t *props, */ (void) nvlist_lookup_string(props, zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); - spa = spa_add(pool, altroot); - spa_activate(spa); + (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); + } - if (allowfaulted) - spa->spa_import_faulted = B_TRUE; - spa->spa_is_root = isroot; + spa_activate(spa, mode); /* - * Pass off the heavy lifting to spa_load(). - * Pass TRUE for mosconfig (unless this is a root pool) because - * the user-supplied config is actually the one to trust when + * 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. */ - loaderr = error = spa_load(spa, config, SPA_LOAD_IMPORT, !isroot); + 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(). + * Toss any existing sparelist, as it doesn't have any validity + * anymore, and conflicts with spa_has_spare(). */ - if (!isroot && spa->spa_spares.sav_config) { + if (spa->spa_spares.sav_config) { nvlist_free(spa->spa_spares.sav_config); spa->spa_spares.sav_config = NULL; spa_load_spares(spa); } - if (!isroot && spa->spa_l2cache.sav_config) { + if (spa->spa_l2cache.sav_config) { nvlist_free(spa->spa_l2cache.sav_config); spa->spa_l2cache.sav_config = NULL; spa_load_l2cache(spa); @@ -2154,36 +3828,27 @@ spa_import_common(const char *pool, nvlist_t *config, nvlist_t *props, VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); if (error == 0) - error = spa_validate_aux(spa, nvroot, -1ULL, VDEV_ALLOC_SPARE); + 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 (error != 0 || (props && (error = spa_prop_set(spa, props)))) { - if (loaderr != 0 && loaderr != EINVAL && allowfaulted) { - /* - * If we failed to load the pool, but 'allowfaulted' is - * set, then manually set the config as if the config - * passed in was specified in the cache file. - */ - error = 0; - spa->spa_import_faulted = B_FALSE; - if (spa->spa_config == NULL) - spa->spa_config = spa_config_generate(spa, - NULL, -1ULL, B_TRUE); - spa_unload(spa); - spa_deactivate(spa); - spa_config_sync(spa, B_FALSE, B_TRUE); - } else { - spa_unload(spa); - spa_deactivate(spa); - spa_remove(spa); - } + 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. @@ -2195,7 +3860,7 @@ spa_import_common(const char *pool, nvlist_t *config, nvlist_t *props, ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); else VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, - NV_UNIQUE_NAME, KM_SLEEP) == 0); + NV_UNIQUE_NAME, KM_PUSHPAGE) == 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); @@ -2210,7 +3875,7 @@ spa_import_common(const char *pool, nvlist_t *config, nvlist_t *props, ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); else VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, - NV_UNIQUE_NAME, KM_SLEEP) == 0); + NV_UNIQUE_NAME, KM_PUSHPAGE) == 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); @@ -2219,256 +3884,32 @@ spa_import_common(const char *pool, nvlist_t *config, nvlist_t *props, spa->spa_l2cache.sav_sync = B_TRUE; } - if (spa_mode & FWRITE) { - /* - * Update the config cache to include the newly-imported pool. - */ - spa_config_update_common(spa, SPA_CONFIG_UPDATE_POOL, isroot); - } - - spa->spa_import_faulted = B_FALSE; - mutex_exit(&spa_namespace_lock); - - return (0); -} - -#ifdef _KERNEL -/* - * Build a "root" vdev for a top level vdev read in from a rootpool - * device label. - */ -static void -spa_build_rootpool_config(nvlist_t *config) -{ - nvlist_t *nvtop, *nvroot; - uint64_t pgid; - - /* - * 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); - - /* - * 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); -} - -/* - * 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 **); - -int -spa_check_rootconf(char *devpath, char *devid, nvlist_t **bestconf, - uint64_t *besttxg) -{ - nvlist_t *config; - uint64_t txg; - int error; - - if (error = vdev_disk_read_rootlabel(devpath, devid, &config)) - return (error); - - VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); - - if (bestconf != NULL) - *bestconf = config; - else - nvlist_free(config); - *besttxg = txg; - return (0); -} - -boolean_t -spa_rootdev_validate(nvlist_t *nv) -{ - uint64_t ival; - - if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, &ival) == 0 || - nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, &ival) == 0 || - nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, &ival) == 0) - return (B_FALSE); - - return (B_TRUE); -} - - -/* - * Given the boot device's physical path or devid, check if the device - * is in a valid state. If so, return the configuration from the vdev - * label. - */ -int -spa_get_rootconf(char *devpath, char *devid, nvlist_t **bestconf) -{ - nvlist_t *conf = NULL; - uint64_t txg = 0; - nvlist_t *nvtop, **child; - char *type; - char *bootpath = NULL; - uint_t children, c; - char *tmp; - int error; - - if (devpath && ((tmp = strchr(devpath, ' ')) != NULL)) - *tmp = '\0'; - if (error = spa_check_rootconf(devpath, devid, &conf, &txg)) { - cmn_err(CE_NOTE, "error reading device label"); - return (error); - } - if (txg == 0) { - cmn_err(CE_NOTE, "this device is detached"); - nvlist_free(conf); - return (EINVAL); - } - - VERIFY(nvlist_lookup_nvlist(conf, ZPOOL_CONFIG_VDEV_TREE, - &nvtop) == 0); - VERIFY(nvlist_lookup_string(nvtop, ZPOOL_CONFIG_TYPE, &type) == 0); - - if (strcmp(type, VDEV_TYPE_DISK) == 0) { - if (spa_rootdev_validate(nvtop)) { - goto out; - } else { - nvlist_free(conf); - return (EINVAL); - } - } - - ASSERT(strcmp(type, VDEV_TYPE_MIRROR) == 0); - - VERIFY(nvlist_lookup_nvlist_array(nvtop, ZPOOL_CONFIG_CHILDREN, - &child, &children) == 0); - /* - * Go thru vdevs in the mirror to see if the given device - * has the most recent txg. Only the device with the most - * recent txg has valid information and should be booted. + * Check for any removed devices. */ - for (c = 0; c < children; c++) { - char *cdevid, *cpath; - uint64_t tmptxg; - - if (nvlist_lookup_string(child[c], ZPOOL_CONFIG_PHYS_PATH, - &cpath) != 0) - return (EINVAL); - if (nvlist_lookup_string(child[c], ZPOOL_CONFIG_DEVID, - &cdevid) != 0) - return (EINVAL); - if ((spa_check_rootconf(cpath, cdevid, NULL, - &tmptxg) == 0) && (tmptxg > txg)) { - txg = tmptxg; - VERIFY(nvlist_lookup_string(child[c], - ZPOOL_CONFIG_PATH, &bootpath) == 0); - } + if (spa->spa_autoreplace) { + spa_aux_check_removed(&spa->spa_spares); + spa_aux_check_removed(&spa->spa_l2cache); } - /* Does the best device match the one we've booted from? */ - if (bootpath) { - cmn_err(CE_NOTE, "try booting from '%s'", bootpath); - return (EINVAL); + if (spa_writeable(spa)) { + /* + * Update the config cache to include the newly-imported pool. + */ + spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); } -out: - *bestconf = conf; - return (0); -} - -/* - * 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) -{ - nvlist_t *conf = NULL; - char *pname; - int error; - - /* - * Get the vdev pathname and configuation from the most - * recently updated vdev (highest txg). - */ - if (error = spa_get_rootconf(devpath, devid, &conf)) - goto msg_out; - - /* - * Add type "root" vdev to the config. - */ - spa_build_rootpool_config(conf); - - VERIFY(nvlist_lookup_string(conf, ZPOOL_CONFIG_POOL_NAME, &pname) == 0); - - /* - * We specify 'allowfaulted' for this to be treated like spa_open() - * instead of spa_import(). This prevents us from marking vdevs as - * persistently unavailable, and generates FMA ereports as if it were a - * pool open, not import. - */ - error = spa_import_common(pname, conf, NULL, B_TRUE, B_TRUE); - ASSERT(error != EEXIST); - - nvlist_free(conf); - return (error); - -msg_out: - cmn_err(CE_NOTE, "\n" - " *************************************************** \n" - " * This device is not bootable! * \n" - " * It is either offlined or detached or faulted. * \n" - " * Please try to boot from a different device. * \n" - " *************************************************** "); - - return (error); -} -#endif - -/* - * Import a non-root pool into the system. - */ -int -spa_import(const char *pool, nvlist_t *config, nvlist_t *props) -{ - return (spa_import_common(pool, config, props, B_FALSE, B_FALSE)); -} -int -spa_import_faulted(const char *pool, nvlist_t *config, nvlist_t *props) -{ - return (spa_import_common(pool, config, props, B_FALSE, B_TRUE)); -} + /* + * 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); -/* - * 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" + return (0); +} nvlist_t * spa_tryimport(nvlist_t *tryconfig) @@ -2477,6 +3918,7 @@ spa_tryimport(nvlist_t *tryconfig) char *poolname; spa_t *spa; uint64_t state; + int error; if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) return (NULL); @@ -2488,15 +3930,15 @@ spa_tryimport(nvlist_t *tryconfig) * Create and initialize the spa structure. */ mutex_enter(&spa_namespace_lock); - spa = spa_add(TRYIMPORT_NAME, NULL); - spa_activate(spa); + 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. */ - (void) spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE); + error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE); /* * If 'tryconfig' was at least parsable, return the current config. @@ -2509,14 +3951,16 @@ spa_tryimport(nvlist_t *tryconfig) state) == 0); VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, spa->spa_uberblock.ub_timestamp) == 0); + VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, + spa->spa_load_info) == 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 (spa->spa_bootfs) { - char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); + if ((!error || error == EEXIST) && spa->spa_bootfs) { + char *tmpname = kmem_alloc(MAXPATHLEN, KM_PUSHPAGE); /* * We have to play games with the name since the @@ -2525,7 +3969,7 @@ spa_tryimport(nvlist_t *tryconfig) if (dsl_dsobj_to_dsname(spa_name(spa), spa->spa_bootfs, tmpname) == 0) { char *cp; - char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); + char *dsname = kmem_alloc(MAXPATHLEN, KM_PUSHPAGE); cp = strchr(tmpname, '/'); if (cp == NULL) { @@ -2545,8 +3989,10 @@ spa_tryimport(nvlist_t *tryconfig) /* * 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); @@ -2563,18 +4009,19 @@ spa_tryimport(nvlist_t *tryconfig) * 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. + * 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 force, boolean_t hardforce) { spa_t *spa; if (oldconfig) *oldconfig = NULL; - if (!(spa_mode & FWRITE)) + if (!(spa_mode_global & FWRITE)) return (EROFS); mutex_enter(&spa_namespace_lock); @@ -2635,16 +4082,17 @@ spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, * so mark them all dirty. spa_unload() will do the * final sync that pushes these changes out. */ - if (new_state != POOL_STATE_UNINITIALIZED) { + 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) + 1; + 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); + spa_event_notify(spa, NULL, FM_EREPORT_ZFS_POOL_DESTROY); if (spa->spa_state != POOL_STATE_UNINITIALIZED) { spa_unload(spa); @@ -2655,7 +4103,8 @@ spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); if (new_state != POOL_STATE_UNINITIALIZED) { - spa_config_sync(spa, B_TRUE, B_TRUE); + if (!hardforce) + spa_config_sync(spa, B_TRUE, B_TRUE); spa_remove(spa); } mutex_exit(&spa_namespace_lock); @@ -2669,16 +4118,19 @@ spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, int spa_destroy(char *pool) { - return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, B_FALSE)); + 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) +spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, + boolean_t hardforce) { - return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, force)); + return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, + force, hardforce)); } /* @@ -2689,7 +4141,7 @@ int spa_reset(char *pool) { return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, - B_FALSE)); + B_FALSE, B_FALSE)); } /* @@ -2704,12 +4156,15 @@ spa_reset(char *pool) int spa_vdev_add(spa_t *spa, nvlist_t *nvroot) { - uint64_t txg; - int c, error; + 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; + int c; + + ASSERT(spa_writeable(spa)); txg = spa_vdev_enter(spa); @@ -2745,9 +4200,19 @@ spa_vdev_add(spa_t *spa, nvlist_t *nvroot) * Transfer each new top-level vdev from vd to rvd. */ for (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 = rvd->vdev_children; + tvd->vdev_id = id; vdev_add_child(rvd, tvd); vdev_config_dirty(tvd); } @@ -2804,15 +4269,16 @@ spa_vdev_add(spa_t *spa, nvlist_t *nvroot) int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) { - uint64_t txg, open_txg; - vdev_t *rvd = spa->spa_root_vdev; + uint64_t txg, dtl_max_txg; + ASSERTV(vdev_t *rvd = spa->spa_root_vdev;) vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; vdev_ops_t *pvops; - dmu_tx_t *tx; 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); @@ -2826,7 +4292,7 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) pvd = oldvd->vdev_parent; if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, - VDEV_ALLOC_ADD)) != 0) + VDEV_ALLOC_ATTACH)) != 0) return (spa_vdev_exit(spa, NULL, txg, EINVAL)); if (newrootvd->vdev_children != 1) @@ -2862,7 +4328,7 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) * spares. */ if (pvd->vdev_ops == &vdev_spare_ops && - pvd->vdev_child[1] == oldvd && + oldvd->vdev_isspare && !spa_has_spare(spa, newvd->vdev_guid)) return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); @@ -2874,23 +4340,24 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) * the same (spare replaces spare, non-spare replaces * non-spare). */ - if (pvd->vdev_ops == &vdev_replacing_ops) + 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) + } else if (pvd->vdev_ops == &vdev_spare_ops && + newvd->vdev_isspare != oldvd->vdev_isspare) { return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); - else if (pvd->vdev_ops != &vdev_spare_ops && - newvd->vdev_isspare) + } + + if (newvd->vdev_isspare) pvops = &vdev_spare_ops; else pvops = &vdev_replacing_ops; } /* - * Compare the new device size with the replaceable/attachable - * device size. + * Make sure the new device is big enough. */ - if (newvd->vdev_psize < vdev_get_rsize(oldvd)) + if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); /* @@ -2907,7 +4374,7 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) 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); + KM_PUSHPAGE); (void) sprintf(oldvd->vdev_path, "%s/%s", newvd->vdev_path, "old"); if (oldvd->vdev_devid != NULL) { @@ -2916,6 +4383,9 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) } } + /* 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. @@ -2932,14 +4402,9 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) */ vdev_remove_child(newrootvd, newvd); newvd->vdev_id = pvd->vdev_children; + newvd->vdev_crtxg = oldvd->vdev_crtxg; vdev_add_child(pvd, newvd); - /* - * If newvd is smaller than oldvd, but larger than its rsize, - * the addition of newvd may have decreased our parent's asize. - */ - pvd->vdev_asize = MIN(pvd->vdev_asize, newvd->vdev_asize); - tvd = newvd->vdev_top; ASSERT(pvd->vdev_top == tvd); ASSERT(tvd->vdev_parent == rvd); @@ -2947,18 +4412,20 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) vdev_config_dirty(tvd); /* - * Set newvd's DTL to [TXG_INITIAL, open_txg]. It will propagate - * upward when spa_vdev_exit() calls vdev_dtl_reassess(). + * 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(). */ - open_txg = txg + TXG_CONCURRENT_STATES - 1; + dtl_max_txg = txg + TXG_CONCURRENT_STATES; - mutex_enter(&newvd->vdev_dtl_lock); - space_map_add(&newvd->vdev_dtl_map, TXG_INITIAL, - open_txg - TXG_INITIAL + 1); - mutex_exit(&newvd->vdev_dtl_lock); + vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, + dtl_max_txg - TXG_INITIAL); - if (newvd->vdev_isspare) + if (newvd->vdev_isspare) { spa_spare_activate(newvd); + spa_event_notify(spa, newvd, FM_EREPORT_ZFS_DEVICE_SPARE); + } + oldvdpath = spa_strdup(oldvd->vdev_path); newvdpath = spa_strdup(newvd->vdev_path); newvd_isspare = newvd->vdev_isspare; @@ -2968,27 +4435,27 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) */ vdev_dirty(tvd, VDD_DTL, newvd, txg); - (void) spa_vdev_exit(spa, newrootvd, open_txg, 0); + /* + * Restart the resilver + */ + dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); - tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); - if (dmu_tx_assign(tx, TXG_WAIT) == 0) { - spa_history_internal_log(LOG_POOL_VDEV_ATTACH, spa, tx, - CRED(), "%s vdev=%s %s vdev=%s", - replacing && newvd_isspare ? "spare in" : - replacing ? "replace" : "attach", newvdpath, - replacing ? "for" : "to", oldvdpath); - dmu_tx_commit(tx); - } else { - dmu_tx_abort(tx); - } + /* + * 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); - /* - * Kick off a resilver to update newvd. - */ - VERIFY3U(spa_scrub(spa, POOL_SCRUB_RESILVER), ==, 0); + if (spa->spa_bootfs) + spa_event_notify(spa, newvd, FM_EREPORT_ZFS_BOOTFS_VDEV_ATTACH); return (0); } @@ -2999,15 +4466,18 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) * is a replacing vdev. */ int -spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) +spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) { uint64_t txg; - int c, t, error; - vdev_t *rvd = spa->spa_root_vdev; + int error; + ASSERTV(vdev_t *rvd = spa->spa_root_vdev;) vdev_t *vd, *pvd, *cvd, *tvd; boolean_t unspare = B_FALSE; - uint64_t unspare_guid; - size_t len; + uint64_t unspare_guid = 0; + char *vdpath; + int c, t; + + ASSERT(spa_writeable(spa)); txg = spa_vdev_enter(spa); @@ -3022,18 +4492,27 @@ spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) pvd = vd->vdev_parent; /* - * If replace_done is specified, only remove this device if it's - * the first child of a replacing vdev. For the 'spare' vdev, either - * disk can be removed. + * 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 (replace_done) { - if (pvd->vdev_ops == &vdev_replacing_ops) { - if (vd->vdev_id != 0) - return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); - } else if (pvd->vdev_ops != &vdev_spare_ops) { - return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); - } - } + 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); @@ -3047,52 +4526,35 @@ spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); /* - * If there's only one replica, you can't detach it. + * If this device has the only valid copy of some data, + * we cannot safely detach it. */ - if (pvd->vdev_children <= 1) + if (vdev_dtl_required(vd)) return (spa_vdev_exit(spa, NULL, txg, EBUSY)); - /* - * If all siblings have non-empty DTLs, this device may have the only - * valid copy of the data, which means we cannot safely detach it. - * - * XXX -- as in the vdev_offline() case, we really want a more - * precise DTL check. - */ - for (c = 0; c < pvd->vdev_children; c++) { - uint64_t dirty; - - cvd = pvd->vdev_child[c]; - if (cvd == vd) - continue; - if (vdev_is_dead(cvd)) - continue; - mutex_enter(&cvd->vdev_dtl_lock); - dirty = cvd->vdev_dtl_map.sm_space | - cvd->vdev_dtl_scrub.sm_space; - mutex_exit(&cvd->vdev_dtl_lock); - if (!dirty) - break; - } - - if (c == pvd->vdev_children) - 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 == 1 && - pvd->vdev_child[0]->vdev_path != NULL && - pvd->vdev_child[1]->vdev_path != NULL) { - ASSERT(pvd->vdev_child[1] == vd); - cvd = pvd->vdev_child[0]; - len = strlen(vd->vdev_path); - 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); + if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && + vd->vdev_path != NULL) { + size_t len = strlen(vd->vdev_path); + + for (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; + } } } @@ -3102,7 +4564,8 @@ spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) * active spare list for the pool. */ if (pvd->vdev_ops == &vdev_spare_ops && - vd->vdev_id == 0) + vd->vdev_id == 0 && + pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) unspare = B_TRUE; /* @@ -3124,26 +4587,36 @@ spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) /* * Remember one of the remaining children so we can get tvd below. */ - cvd = pvd->vdev_child[0]; + 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. + * 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_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 @@ -3158,12 +4631,16 @@ spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) vdev_propagate_state(cvd); /* - * If the device we just detached was smaller than the others, it may be - * possible to add metaslabs (i.e. grow the pool). vdev_metaslab_init() - * can't fail because the existing metaslabs are already in core, so - * there's nothing to read from disk. + * 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. */ - VERIFY(vdev_metaslab_init(tvd, txg) == 0); + if (spa->spa_autoexpand) { + vdev_reopen(tvd); + vdev_expand(tvd, txg); + } vdev_config_dirty(tvd); @@ -3173,42 +4650,345 @@ spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) * 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 (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); + spa_event_notify(spa, vd, FM_EREPORT_ZFS_DEVICE_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 = NULL; + spa_t *altspa = NULL; + mutex_enter(&spa_namespace_lock); - while ((spa = spa_next(spa)) != NULL) { - if (spa->spa_state != POOL_STATE_ACTIVE) + while ((altspa = spa_next(altspa)) != NULL) { + if (altspa->spa_state != POOL_STATE_ACTIVE || + altspa == spa) continue; - spa_open_ref(spa, FTAG); + + spa_open_ref(altspa, FTAG); mutex_exit(&spa_namespace_lock); - (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); + (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); mutex_enter(&spa_namespace_lock); - spa_close(spa, FTAG); + 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_PUSHPAGE); + glist = kmem_zalloc(children * sizeof (uint64_t), KM_PUSHPAGE); + + /* 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_PUSHPAGE) == 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_PUSHPAGE) == 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++) { + int i; + + for (i = 0; i < count; i++) { uint64_t guid; VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID, @@ -3226,20 +5006,21 @@ spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, nvlist_t *dev_to_remove) { nvlist_t **newdev = NULL; + int i, j; if (count > 1) - newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); + newdev = kmem_alloc((count - 1) * sizeof (void *), KM_PUSHPAGE); - for (int i = 0, j = 0; i < count; i++) { + for (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_dup(dev[i], &newdev[j++], KM_PUSHPAGE) == 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++) + for (i = 0; i < count - 1; i++) nvlist_free(newdev[i]); if (count > 1) @@ -3247,19 +5028,120 @@ spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, } /* + * 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 and level 2 ARC devices. + * 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; - uint64_t txg; int error = 0; + boolean_t locked = MUTEX_HELD(&spa_namespace_lock); - txg = spa_vdev_enter(spa); + ASSERT(spa_writeable(spa)); + + if (!locked) + txg = spa_vdev_enter(spa); vd = spa_lookup_by_guid(spa, guid, B_FALSE); @@ -3290,6 +5172,49 @@ spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) 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). @@ -3302,7 +5227,10 @@ spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) error = ENOENT; } - return (spa_vdev_exit(spa, NULL, txg, error)); + if (!locked) + return (spa_vdev_exit(spa, NULL, txg, error)); + + return (error); } /* @@ -3322,37 +5250,64 @@ spa_vdev_resilver_done_hunt(vdev_t *vd) } /* - * Check for a completed replacement. + * 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 && vd->vdev_children == 2) { + 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]; - newvd = vd->vdev_child[1]; - mutex_enter(&newvd->vdev_dtl_lock); - if (newvd->vdev_dtl_map.sm_space == 0 && - newvd->vdev_dtl_scrub.sm_space == 0) { - mutex_exit(&newvd->vdev_dtl_lock); + if (vdev_dtl_empty(newvd, DTL_MISSING) && + vdev_dtl_empty(newvd, DTL_OUTAGE) && + !vdev_dtl_required(oldvd)) return (oldvd); - } - mutex_exit(&newvd->vdev_dtl_lock); } /* * Check for a completed resilver with the 'unspare' flag set. */ - if (vd->vdev_ops == &vdev_spare_ops && vd->vdev_children == 2) { - newvd = vd->vdev_child[0]; - oldvd = vd->vdev_child[1]; + 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; + } - mutex_enter(&newvd->vdev_dtl_lock); - if (newvd->vdev_unspare && - newvd->vdev_dtl_map.sm_space == 0 && - newvd->vdev_dtl_scrub.sm_space == 0) { - newvd->vdev_unspare = 0; - mutex_exit(&newvd->vdev_dtl_lock); + 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); } - mutex_exit(&newvd->vdev_dtl_lock); } return (NULL); @@ -3361,128 +5316,125 @@ spa_vdev_resilver_done_hunt(vdev_t *vd) static void spa_vdev_resilver_done(spa_t *spa) { - vdev_t *vd; - vdev_t *pvd; - uint64_t guid; - uint64_t pguid = 0; + vdev_t *vd, *pvd, *ppvd; + uint64_t guid, sguid, pguid, ppguid; - spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); + 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. */ - pvd = vd->vdev_parent; - if (pvd->vdev_parent->vdev_ops == &vdev_spare_ops && - pvd->vdev_id == 0) { + if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && + ppvd->vdev_children == 2) { ASSERT(pvd->vdev_ops == &vdev_replacing_ops); - ASSERT(pvd->vdev_parent->vdev_children == 2); - pguid = pvd->vdev_parent->vdev_child[1]->vdev_guid; + sguid = ppvd->vdev_child[1]->vdev_guid; } - spa_config_exit(spa, SCL_CONFIG, FTAG); - if (spa_vdev_detach(spa, guid, B_TRUE) != 0) + spa_config_exit(spa, SCL_ALL, FTAG); + if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) return; - if (pguid != 0 && spa_vdev_detach(spa, pguid, B_TRUE) != 0) + if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) return; - spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); } - spa_config_exit(spa, SCL_CONFIG, FTAG); + spa_config_exit(spa, SCL_ALL, FTAG); } /* - * Update the stored path for this vdev. Dirty the vdev configuration, relying - * on spa_vdev_enter/exit() to synchronize the labels and cache. + * Update the stored path or FRU for this vdev. */ int -spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) +spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, + boolean_t ispath) { vdev_t *vd; - uint64_t txg; + boolean_t sync = B_FALSE; - txg = spa_vdev_enter(spa); + ASSERT(spa_writeable(spa)); - if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) { - /* - * Determine if this is a reference to a hot spare device. If - * it is, update the path manually as there is no associated - * vdev_t that can be synced to disk. - */ - nvlist_t **spares; - uint_t i, nspares; - - if (spa->spa_spares.sav_config != NULL) { - VERIFY(nvlist_lookup_nvlist_array( - spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, - &spares, &nspares) == 0); - for (i = 0; i < nspares; i++) { - uint64_t theguid; - VERIFY(nvlist_lookup_uint64(spares[i], - ZPOOL_CONFIG_GUID, &theguid) == 0); - if (theguid == guid) { - VERIFY(nvlist_add_string(spares[i], - ZPOOL_CONFIG_PATH, newpath) == 0); - spa_load_spares(spa); - spa->spa_spares.sav_sync = B_TRUE; - return (spa_vdev_exit(spa, NULL, txg, - 0)); - } - } - } + spa_vdev_state_enter(spa, SCL_ALL); - return (spa_vdev_exit(spa, NULL, txg, ENOENT)); - } + 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_exit(spa, NULL, txg, ENOTSUP)); + 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; + } + } - spa_strfree(vd->vdev_path); - vd->vdev_path = spa_strdup(newpath); + return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); +} - vdev_config_dirty(vd->vdev_top); +int +spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) +{ + return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); +} - return (spa_vdev_exit(spa, NULL, txg, 0)); +int +spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) +{ + return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); } /* * ========================================================================== - * SPA Scrubbing + * SPA Scanning * ========================================================================== */ int -spa_scrub(spa_t *spa, pool_scrub_type_t type) +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 ((uint_t)type >= POOL_SCRUB_TYPES) + 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 (type == POOL_SCRUB_RESILVER && + if (func == POOL_SCAN_RESILVER && !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); return (0); } - if (type == POOL_SCRUB_EVERYTHING && - spa->spa_dsl_pool->dp_scrub_func != SCRUB_FUNC_NONE && - spa->spa_dsl_pool->dp_scrub_isresilver) - return (EBUSY); - - if (type == POOL_SCRUB_EVERYTHING || type == POOL_SCRUB_RESILVER) { - return (dsl_pool_scrub_clean(spa->spa_dsl_pool)); - } else if (type == POOL_SCRUB_NONE) { - return (dsl_pool_scrub_cancel(spa->spa_dsl_pool)); - } else { - return (EINVAL); - } + return (dsl_scan(spa->spa_dsl_pool, func)); } /* @@ -3494,33 +5446,67 @@ spa_scrub(spa_t *spa, pool_scrub_type_t type) static void spa_async_remove(spa_t *spa, vdev_t *vd) { + int c; + if (vd->vdev_remove_wanted) { - vd->vdev_remove_wanted = 0; + vd->vdev_remove_wanted = B_FALSE; + vd->vdev_delayed_close = B_FALSE; vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); - vdev_clear(spa, vd); + + /* + * 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++) + for (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) { + int c; + if (vd->vdev_probe_wanted) { - vd->vdev_probe_wanted = 0; + vd->vdev_probe_wanted = B_FALSE; vdev_reopen(vd); /* vdev_open() does the actual probe */ } - for (int c = 0; c < vd->vdev_children; c++) + for (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) +{ + int c; + + if (!spa->spa_autoexpand) + return; + + for (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; + + spa_event_notify(vd->vdev_spa, vd, FM_EREPORT_ZFS_DEVICE_AUTOEXPAND); +} + +static void spa_async_thread(spa_t *spa) { - int tasks; + int tasks, i; ASSERT(spa->spa_sync_on); @@ -3533,29 +5519,50 @@ spa_async_thread(spa_t *spa) * 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); + 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++) + for (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++) + for (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); + spa_vdev_state_enter(spa, SCL_NONE); spa_async_probe(spa, spa->spa_root_vdev); (void) spa_vdev_state_exit(spa, NULL, 0); } @@ -3570,7 +5577,7 @@ spa_async_thread(spa_t *spa) * Kick off a resilver. */ if (tasks & SPA_ASYNC_RESILVER) - VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER) == 0); + dsl_resilver_restart(spa->spa_dsl_pool, 0); /* * Let the world know that we're done. @@ -3616,6 +5623,7 @@ spa_async_dispatch(spa_t *spa) 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); @@ -3627,37 +5635,22 @@ spa_async_request(spa_t *spa, int task) * ========================================================================== */ -static void -spa_sync_deferred_frees(spa_t *spa, uint64_t txg) +static int +bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) { - bplist_t *bpl = &spa->spa_sync_bplist; - dmu_tx_t *tx; - blkptr_t blk; - uint64_t itor = 0; - zio_t *zio; - int error; - uint8_t c = 1; - - zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CANFAIL); - - while (bplist_iterate(bpl, &itor, &blk) == 0) { - ASSERT(blk.blk_birth < txg); - zio_nowait(zio_free(zio, spa, txg, &blk, NULL, NULL, - ZIO_FLAG_MUSTSUCCEED)); - } - - error = zio_wait(zio); - ASSERT3U(error, ==, 0); + bpobj_t *bpo = arg; + bpobj_enqueue(bpo, bp, tx); + return (0); +} - tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); - bplist_vacate(bpl, tx); +static int +spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) +{ + zio_t *zio = arg; - /* - * Pre-dirty the first block so we sync to convergence faster. - * (Usually only the first block is needed.) - */ - dmu_write(spa->spa_meta_objset, spa->spa_sync_bplist_obj, 0, 1, &c, tx); - dmu_tx_commit(tx); + zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, + zio->io_flags)); + return (0); } static void @@ -3675,16 +5668,16 @@ spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) * 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); + bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); + packed = vmem_alloc(bufsize, KM_PUSHPAGE); VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, - KM_SLEEP) == 0); + KM_PUSHPAGE) == 0); bzero(packed + nvsize, bufsize - nvsize); dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); - kmem_free(packed, bufsize); + vmem_free(packed, bufsize); VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); dmu_buf_will_dirty(db, tx); @@ -3717,14 +5710,14 @@ spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, &sav->sav_object, tx) == 0); } - VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); + VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_PUSHPAGE) == 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); + list = kmem_alloc(sav->sav_count * sizeof (void *), KM_PUSHPAGE); for (i = 0; i < sav->sav_count; i++) list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], - B_FALSE, B_FALSE, B_TRUE); + 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++) @@ -3751,6 +5744,14 @@ spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) config = spa_config_generate(spa, spa->spa_root_vdev, dmu_tx_get_txg(tx), B_FALSE); + /* + * If we're upgrading the spa version then make sure that + * the config object gets updated with the correct version. + */ + if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version) + fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, + spa->spa_uberblock.ub_version); + spa_config_exit(spa, SCL_STATE, FTAG); if (spa->spa_config_syncing) @@ -3760,42 +5761,66 @@ spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) spa_sync_nvlist(spa, spa->spa_config_object, config, tx); } +static void +spa_sync_version(void *arg1, void *arg2, dmu_tx_t *tx) +{ + spa_t *spa = arg1; + uint64_t version = *(uint64_t *)arg2; + + /* + * Setting the version is special cased when first creating the pool. + */ + ASSERT(tx->tx_txg != TXG_INITIAL); + + ASSERT(SPA_VERSION_IS_SUPPORTED(version)); + ASSERT(version >= spa_version(spa)); + + spa->spa_uberblock.ub_version = version; + vdev_config_dirty(spa->spa_root_vdev); +} + /* * Set zpool properties. */ static void -spa_sync_props(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) +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; - spa_config_dirent_t *dp; + nvpair_t *elem = NULL; mutex_enter(&spa->spa_props_lock); - elem = NULL; while ((elem = nvlist_next_nvpair(nvp, elem))) { - switch (prop = zpool_name_to_prop(nvpair_name(elem))) { + uint64_t intval; + char *strval, *fname; + zpool_prop_t prop; + const char *propname; + zprop_type_t proptype; + zfeature_info_t *feature; + + prop = zpool_name_to_prop(nvpair_name(elem)); + switch ((int)prop) { + case ZPROP_INVAL: + /* + * We checked this earlier in spa_prop_validate(). + */ + ASSERT(zpool_prop_feature(nvpair_name(elem))); + + fname = strchr(nvpair_name(elem), '@') + 1; + VERIFY3U(0, ==, zfeature_lookup_name(fname, &feature)); + + spa_feature_enable(spa, feature, tx); + break; + case ZPOOL_PROP_VERSION: + VERIFY(nvpair_value_uint64(elem, &intval) == 0); /* - * Only set version for non-zpool-creation cases - * (set/import). spa_create() needs special care - * for version setting. + * The version is synced seperatly before other + * properties and should be correct by now. */ - 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); - } + ASSERT3U(spa_version(spa), >=, intval); break; case ZPOOL_PROP_ALTROOT: @@ -3806,41 +5831,36 @@ spa_sync_props(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) ASSERT(spa->spa_root != NULL); break; + case ZPOOL_PROP_READONLY: case ZPOOL_PROP_CACHEFILE: /* - * 'cachefile' is a non-persistent property, but note - * an async request that the config cache needs to be - * udpated. + * 'readonly' and 'cachefile' are also non-persisitent + * properties. */ + break; + case ZPOOL_PROP_COMMENT: VERIFY(nvpair_value_string(elem, &strval) == 0); - - dp = kmem_alloc(sizeof (spa_config_dirent_t), KM_SLEEP); - - if (strval[0] == '\0') - dp->scd_path = spa_strdup(spa_config_path); - else if (strcmp(strval, "none") == 0) - dp->scd_path = NULL; - else - dp->scd_path = spa_strdup(strval); - - list_insert_head(&spa->spa_config_list, dp); - spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); + if (spa->spa_comment != NULL) + spa_strfree(spa->spa_comment); + spa->spa_comment = spa_strdup(strval); + /* + * We need to dirty the configuration on all the vdevs + * so that their labels get updated. It's unnecessary + * to do this for pool creation since the vdev's + * configuratoin has already been dirtied. + */ + if (tx->tx_txg != TXG_INITIAL) + vdev_config_dirty(spa->spa_root_vdev); break; default: /* * Set pool property values in the poolprops mos object. */ if (spa->spa_pool_props_object == 0) { - objset_t *mos = spa->spa_meta_objset; - - VERIFY((spa->spa_pool_props_object = - zap_create(mos, DMU_OT_POOL_PROPS, - DMU_OT_NONE, 0, tx)) > 0); - - VERIFY(zap_update(mos, + spa->spa_pool_props_object = + zap_create_link(mos, DMU_OT_POOL_PROPS, DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, - 8, 1, &spa->spa_pool_props_object, tx) - == 0); + tx); } /* normalize the property name */ @@ -3879,6 +5899,15 @@ spa_sync_props(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) 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; } @@ -3887,8 +5916,8 @@ spa_sync_props(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) /* 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_internal_log(LOG_POOL_PROPSET, - spa, tx, cr, "%s %lld %s", + spa_history_log_internal(LOG_POOL_PROPSET, + spa, tx, "%s %lld %s", nvpair_name(elem), intval, spa_name(spa)); } } @@ -3897,6 +5926,47 @@ spa_sync_props(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) } /* + * 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; + } + + if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES && + spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { + spa_feature_create_zap_objects(spa, tx); + } +} + +/* * Sync the specified transaction group. New blocks may be dirtied as * part of the process, so we iterate until it converges. */ @@ -3905,12 +5975,15 @@ spa_sync(spa_t *spa, uint64_t txg) { dsl_pool_t *dp = spa->spa_dsl_pool; objset_t *mos = spa->spa_meta_objset; - bplist_t *bpl = &spa->spa_sync_bplist; + 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 dirty_vdevs; int error; + int c; + + VERIFY(spa_writeable(spa)); /* * Lock out configuration changes. @@ -3925,16 +5998,33 @@ spa_sync(spa_t *spa, uint64_t txg) * into config changes that go out with this transaction group. */ spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); - while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { - vdev_state_clean(vd); - vdev_config_dirty(vd); + 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); - VERIFY(0 == bplist_open(bpl, mos, spa->spa_sync_bplist_obj)); - tx = dmu_tx_create_assigned(dp, txg); + spa->spa_sync_starttime = gethrtime(); + taskq_cancel_id(system_taskq, spa->spa_deadman_tqid); + spa->spa_deadman_tqid = taskq_dispatch_delay(system_taskq, + spa_deadman, spa, TQ_SLEEP, ddi_get_lbolt() + + NSEC_TO_TICK(spa->spa_deadman_synctime)); + /* * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, * set spa_deflate if we have no raid-z vdevs. @@ -3956,34 +6046,29 @@ spa_sync(spa_t *spa, uint64_t txg) } } - 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 anything has changed in this txg, 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 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)) - spa_sync_deferred_frees(spa, 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 { - spa->spa_sync_pass++; + int pass = ++spa->spa_sync_pass; spa_sync_config_object(spa, tx); spa_sync_aux_dev(spa, &spa->spa_spares, tx, @@ -3993,18 +6078,26 @@ spa_sync(spa_t *spa, uint64_t txg) spa_errlog_sync(spa, txg); dsl_pool_sync(dp, txg); - dirty_vdevs = 0; - while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) { - vdev_sync(vd, txg); - dirty_vdevs++; + 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); } - bplist_sync(bpl, tx); - } while (dirty_vdevs); + ddt_sync(spa, txg); + dsl_scan_sync(dp, tx); - bplist_close(bpl); + while ((vd = txg_list_remove(&spa->spa_vdev_txg_list, txg))) + vdev_sync(vd, txg); + + if (pass == 1) + spa_sync_upgrades(spa, tx); - dprintf("txg %llu passes %d\n", txg, spa->spa_sync_pass); + } while (dmu_objset_is_dirty(mos, txg)); /* * Rewrite the vdev configuration (which includes the uberblock) @@ -4027,7 +6120,6 @@ spa_sync(spa_t *spa, uint64_t txg) int svdcount = 0; int children = rvd->vdev_children; int c0 = spa_get_random(children); - int c; for (c = 0; c < children; c++) { vd = rvd->vdev_child[(c0 + c) % children]; @@ -4037,12 +6129,21 @@ spa_sync(spa_t *spa, uint64_t txg) if (svdcount == SPA_DVAS_PER_BP) break; } - error = vdev_config_sync(svd, svdcount, txg); + 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); + rvd->vdev_children, txg, B_FALSE); + if (error != 0) + error = vdev_config_sync(rvd->vdev_child, + rvd->vdev_children, txg, B_TRUE); } + if (error == 0) + spa->spa_last_synced_guid = rvd->vdev_guid; + spa_config_exit(spa, SCL_STATE, FTAG); if (error == 0) @@ -4052,6 +6153,9 @@ spa_sync(spa_t *spa, uint64_t txg) } dmu_tx_commit(tx); + taskq_cancel_id(system_taskq, spa->spa_deadman_tqid); + spa->spa_deadman_tqid = 0; + /* * Clear the dirty config list. */ @@ -4070,17 +6174,16 @@ spa_sync(spa_t *spa, uint64_t txg) spa->spa_ubsync = spa->spa_uberblock; - /* - * Clean up the ZIL records for the synced txg. - */ - dsl_pool_zil_clean(dp); + dsl_pool_sync_done(dp, txg); /* * Update usable space statistics. */ - while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) + 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(). @@ -4088,10 +6191,13 @@ spa_sync(spa_t *spa, uint64_t txg) 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)); - ASSERT(bpl->bpl_queue == NULL); + + 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. */ @@ -4109,7 +6215,8 @@ 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_suspended(spa)) + if (spa_state(spa) != POOL_STATE_ACTIVE || + !spa_writeable(spa) || spa_suspended(spa)) continue; spa_open_ref(spa, FTAG); mutex_exit(&spa_namespace_lock); @@ -4161,7 +6268,7 @@ spa_evict_all(void) } vdev_t * -spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t l2cache) +spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) { vdev_t *vd; int i; @@ -4169,12 +6276,18 @@ spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t l2cache) if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) return (vd); - if (l2cache) { + 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); @@ -4183,6 +6296,8 @@ spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t l2cache) void spa_upgrade(spa_t *spa, uint64_t version) { + ASSERT(spa_writeable(spa)); + spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); /* @@ -4190,7 +6305,7 @@ spa_upgrade(spa_t *spa, uint64_t version) * future version would result in an unopenable pool, this shouldn't be * possible. */ - ASSERT(spa->spa_uberblock.ub_version <= SPA_VERSION); + ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version)); ASSERT(version >= spa->spa_uberblock.ub_version); spa->spa_uberblock.ub_version = version; @@ -4243,8 +6358,7 @@ spa_has_active_shared_spare(spa_t *spa) } /* - * 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 + * Post a FM_EREPORT_ZFS_* event from sys/fm/fs/zfs.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. @@ -4253,49 +6367,65 @@ 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); + zfs_ereport_post(name, spa, vd, NULL, 0, 0); #endif } + +#if defined(_KERNEL) && defined(HAVE_SPL) +/* state manipulation functions */ +EXPORT_SYMBOL(spa_open); +EXPORT_SYMBOL(spa_open_rewind); +EXPORT_SYMBOL(spa_get_stats); +EXPORT_SYMBOL(spa_create); +EXPORT_SYMBOL(spa_import_rootpool); +EXPORT_SYMBOL(spa_import); +EXPORT_SYMBOL(spa_tryimport); +EXPORT_SYMBOL(spa_destroy); +EXPORT_SYMBOL(spa_export); +EXPORT_SYMBOL(spa_reset); +EXPORT_SYMBOL(spa_async_request); +EXPORT_SYMBOL(spa_async_suspend); +EXPORT_SYMBOL(spa_async_resume); +EXPORT_SYMBOL(spa_inject_addref); +EXPORT_SYMBOL(spa_inject_delref); +EXPORT_SYMBOL(spa_scan_stat_init); +EXPORT_SYMBOL(spa_scan_get_stats); + +/* device maniion */ +EXPORT_SYMBOL(spa_vdev_add); +EXPORT_SYMBOL(spa_vdev_attach); +EXPORT_SYMBOL(spa_vdev_detach); +EXPORT_SYMBOL(spa_vdev_remove); +EXPORT_SYMBOL(spa_vdev_setpath); +EXPORT_SYMBOL(spa_vdev_setfru); +EXPORT_SYMBOL(spa_vdev_split_mirror); + +/* spare statech is global across all pools) */ +EXPORT_SYMBOL(spa_spare_add); +EXPORT_SYMBOL(spa_spare_remove); +EXPORT_SYMBOL(spa_spare_exists); +EXPORT_SYMBOL(spa_spare_activate); + +/* L2ARC statech is global across all pools) */ +EXPORT_SYMBOL(spa_l2cache_add); +EXPORT_SYMBOL(spa_l2cache_remove); +EXPORT_SYMBOL(spa_l2cache_exists); +EXPORT_SYMBOL(spa_l2cache_activate); +EXPORT_SYMBOL(spa_l2cache_drop); + +/* scanning */ +EXPORT_SYMBOL(spa_scan); +EXPORT_SYMBOL(spa_scan_stop); + +/* spa syncing */ +EXPORT_SYMBOL(spa_sync); /* only for DMU use */ +EXPORT_SYMBOL(spa_sync_allpools); + +/* properties */ +EXPORT_SYMBOL(spa_prop_set); +EXPORT_SYMBOL(spa_prop_get); +EXPORT_SYMBOL(spa_prop_clear_bootfs); + +/* asynchronous event notification */ +EXPORT_SYMBOL(spa_event_notify); +#endif