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[95.90.238.63]) by smtp.gmail.com with ESMTPSA id f18sm5065294wrx.85.2019.08.13.07.58.31 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 13 Aug 2019 07:58:32 -0700 (PDT) From: Kleber Sacilotto de Souza To: kernel-team@lists.ubuntu.com Subject: [SRU][Bionic][PATCH 1/1] UBUNTU: SAUCE: (noup) remove completely the zfs code Date: Tue, 13 Aug 2019 16:58:29 +0200 Message-Id: <20190813145829.15397-2-kleber.souza@canonical.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190813145829.15397-1-kleber.souza@canonical.com> References: <20190813145829.15397-1-kleber.souza@canonical.com> X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" BugLink: https://bugs.launchpad.net/bugs/1840051 Commit 1d1ecf03f066 "UBUNTU: [Packaging] dkms -- drop zfs/spl source code from kernel" didn't remove completely the zfs source code from Bionic tree. Signed-off-by: Kleber Sacilotto de Souza --- zfs/META | 8 - zfs/include/sys/spa_impl.h | 306 -- zfs/module/zfs/dmu_traverse.c | 752 ---- zfs/module/zfs/spa.c | 7321 --------------------------------- 4 files changed, 8387 deletions(-) delete mode 100644 zfs/META delete mode 100644 zfs/include/sys/spa_impl.h delete mode 100644 zfs/module/zfs/dmu_traverse.c delete mode 100644 zfs/module/zfs/spa.c diff --git a/zfs/META b/zfs/META deleted file mode 100644 index 08238596120a..000000000000 --- a/zfs/META +++ /dev/null @@ -1,8 +0,0 @@ -Meta: 1 -Name: zfs -Branch: 1.0 -Version: 0.7.5 -Release: 1ubuntu16.6 -Release-Tags: relext -License: CDDL -Author: OpenZFS on Linux diff --git a/zfs/include/sys/spa_impl.h b/zfs/include/sys/spa_impl.h deleted file mode 100644 index 34b11992242c..000000000000 --- a/zfs/include/sys/spa_impl.h +++ /dev/null @@ -1,306 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License (the "License"). - * You may not use this file except in compliance with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ -/* - * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. - * Copyright (c) 2011, 2015 by Delphix. All rights reserved. - * Copyright 2011 Nexenta Systems, Inc. All rights reserved. - * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. - * Copyright 2013 Saso Kiselkov. All rights reserved. - * Copyright (c) 2016 Actifio, Inc. All rights reserved. - * Copyright (c) 2017 Datto Inc. - */ - -#ifndef _SYS_SPA_IMPL_H -#define _SYS_SPA_IMPL_H - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#ifdef __cplusplus -extern "C" { -#endif - -typedef struct spa_error_entry { - zbookmark_phys_t se_bookmark; - char *se_name; - avl_node_t se_avl; -} spa_error_entry_t; - -typedef struct spa_history_phys { - uint64_t sh_pool_create_len; /* ending offset of zpool create */ - uint64_t sh_phys_max_off; /* physical EOF */ - uint64_t sh_bof; /* logical BOF */ - uint64_t sh_eof; /* logical EOF */ - uint64_t sh_records_lost; /* num of records overwritten */ -} spa_history_phys_t; - -struct spa_aux_vdev { - uint64_t sav_object; /* MOS object for device list */ - nvlist_t *sav_config; /* cached device config */ - vdev_t **sav_vdevs; /* devices */ - int sav_count; /* number devices */ - boolean_t sav_sync; /* sync the device list */ - nvlist_t **sav_pending; /* pending device additions */ - uint_t sav_npending; /* # pending devices */ -}; - -typedef struct spa_config_lock { - kmutex_t scl_lock; - kthread_t *scl_writer; - int scl_write_wanted; - kcondvar_t scl_cv; - refcount_t scl_count; -} spa_config_lock_t; - -typedef struct spa_config_dirent { - list_node_t scd_link; - char *scd_path; -} spa_config_dirent_t; - -typedef enum zio_taskq_type { - ZIO_TASKQ_ISSUE = 0, - ZIO_TASKQ_ISSUE_HIGH, - ZIO_TASKQ_INTERRUPT, - ZIO_TASKQ_INTERRUPT_HIGH, - ZIO_TASKQ_TYPES -} zio_taskq_type_t; - -/* - * State machine for the zpool-poolname process. The states transitions - * are done as follows: - * - * From To Routine - * PROC_NONE -> PROC_CREATED spa_activate() - * PROC_CREATED -> PROC_ACTIVE spa_thread() - * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate() - * PROC_DEACTIVATE -> PROC_GONE spa_thread() - * PROC_GONE -> PROC_NONE spa_deactivate() - */ -typedef enum spa_proc_state { - SPA_PROC_NONE, /* spa_proc = &p0, no process created */ - SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */ - SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */ - SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */ - SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */ -} spa_proc_state_t; - -typedef struct spa_taskqs { - uint_t stqs_count; - taskq_t **stqs_taskq; -} spa_taskqs_t; - -typedef enum spa_all_vdev_zap_action { - AVZ_ACTION_NONE = 0, - AVZ_ACTION_DESTROY, /* Destroy all per-vdev ZAPs and the AVZ. */ - AVZ_ACTION_REBUILD, /* Populate the new AVZ, see spa_avz_rebuild */ - AVZ_ACTION_INITIALIZE -} spa_avz_action_t; - -struct spa { - /* - * Fields protected by spa_namespace_lock. - */ - char spa_name[ZFS_MAX_DATASET_NAME_LEN]; /* pool name */ - char *spa_comment; /* comment */ - avl_node_t spa_avl; /* node in spa_namespace_avl */ - nvlist_t *spa_config; /* last synced config */ - nvlist_t *spa_config_syncing; /* currently syncing config */ - nvlist_t *spa_config_splitting; /* config for splitting */ - nvlist_t *spa_load_info; /* info and errors from load */ - uint64_t spa_config_txg; /* txg of last config change */ - int spa_sync_pass; /* iterate-to-convergence */ - pool_state_t spa_state; /* pool state */ - int spa_inject_ref; /* injection references */ - uint8_t spa_sync_on; /* sync threads are running */ - spa_load_state_t spa_load_state; /* current load operation */ - uint64_t spa_import_flags; /* import specific flags */ - spa_taskqs_t spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES]; - dsl_pool_t *spa_dsl_pool; - boolean_t spa_is_initializing; /* true while opening pool */ - metaslab_class_t *spa_normal_class; /* normal data class */ - metaslab_class_t *spa_log_class; /* intent log data class */ - uint64_t spa_first_txg; /* first txg after spa_open() */ - uint64_t spa_final_txg; /* txg of export/destroy */ - uint64_t spa_freeze_txg; /* freeze pool at this txg */ - uint64_t spa_load_max_txg; /* best initial ub_txg */ - uint64_t spa_claim_max_txg; /* highest claimed birth txg */ - timespec_t spa_loaded_ts; /* 1st successful open time */ - objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */ - kmutex_t spa_evicting_os_lock; /* Evicting objset list lock */ - list_t spa_evicting_os_list; /* Objsets being evicted. */ - kcondvar_t spa_evicting_os_cv; /* Objset Eviction Completion */ - txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */ - vdev_t *spa_root_vdev; /* top-level vdev container */ - int spa_min_ashift; /* of vdevs in normal class */ - int spa_max_ashift; /* of vdevs in normal class */ - uint64_t spa_config_guid; /* config pool guid */ - uint64_t spa_load_guid; /* spa_load initialized guid */ - uint64_t spa_last_synced_guid; /* last synced guid */ - list_t spa_config_dirty_list; /* vdevs with dirty config */ - list_t spa_state_dirty_list; /* vdevs with dirty state */ - kmutex_t spa_alloc_lock; - avl_tree_t spa_alloc_tree; - spa_aux_vdev_t spa_spares; /* hot spares */ - spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */ - nvlist_t *spa_label_features; /* Features for reading MOS */ - uint64_t spa_config_object; /* MOS object for pool config */ - uint64_t spa_config_generation; /* config generation number */ - uint64_t spa_syncing_txg; /* txg currently syncing */ - bpobj_t spa_deferred_bpobj; /* deferred-free bplist */ - bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */ - zio_cksum_salt_t spa_cksum_salt; /* secret salt for cksum */ - /* checksum context templates */ - kmutex_t spa_cksum_tmpls_lock; - void *spa_cksum_tmpls[ZIO_CHECKSUM_FUNCTIONS]; - uberblock_t spa_ubsync; /* last synced uberblock */ - uberblock_t spa_uberblock; /* current uberblock */ - boolean_t spa_extreme_rewind; /* rewind past deferred frees */ - uint64_t spa_last_io; /* lbolt of last non-scan I/O */ - kmutex_t spa_scrub_lock; /* resilver/scrub lock */ - uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */ - kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */ - uint8_t spa_scrub_active; /* active or suspended? */ - uint8_t spa_scrub_type; /* type of scrub we're doing */ - uint8_t spa_scrub_finished; /* indicator to rotate logs */ - uint8_t spa_scrub_started; /* started since last boot */ - uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */ - uint64_t spa_scan_pass_start; /* start time per pass/reboot */ - uint64_t spa_scan_pass_scrub_pause; /* scrub pause time */ - uint64_t spa_scan_pass_scrub_spent_paused; /* total paused */ - uint64_t spa_scan_pass_exam; /* examined bytes per pass */ - kmutex_t spa_async_lock; /* protect async state */ - kthread_t *spa_async_thread; /* thread doing async task */ - int spa_async_suspended; /* async tasks suspended */ - kcondvar_t spa_async_cv; /* wait for thread_exit() */ - uint16_t spa_async_tasks; /* async task mask */ - char *spa_root; /* alternate root directory */ - uint64_t spa_ena; /* spa-wide ereport ENA */ - int spa_last_open_failed; /* error if last open failed */ - uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */ - uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */ - uint64_t spa_load_txg; /* ub txg that loaded */ - uint64_t spa_load_txg_ts; /* timestamp from that ub */ - uint64_t spa_load_meta_errors; /* verify metadata err count */ - uint64_t spa_load_data_errors; /* verify data err count */ - uint64_t spa_verify_min_txg; /* start txg of verify scrub */ - kmutex_t spa_errlog_lock; /* error log lock */ - uint64_t spa_errlog_last; /* last error log object */ - uint64_t spa_errlog_scrub; /* scrub error log object */ - kmutex_t spa_errlist_lock; /* error list/ereport lock */ - avl_tree_t spa_errlist_last; /* last error list */ - avl_tree_t spa_errlist_scrub; /* scrub error list */ - uint64_t spa_deflate; /* should we deflate? */ - uint64_t spa_history; /* history object */ - kmutex_t spa_history_lock; /* history lock */ - vdev_t *spa_pending_vdev; /* pending vdev additions */ - kmutex_t spa_props_lock; /* property lock */ - uint64_t spa_pool_props_object; /* object for properties */ - uint64_t spa_bootfs; /* default boot filesystem */ - uint64_t spa_failmode; /* failure mode for the pool */ - uint64_t spa_delegation; /* delegation on/off */ - list_t spa_config_list; /* previous cache file(s) */ - /* per-CPU array of root of async I/O: */ - zio_t **spa_async_zio_root; - zio_t *spa_suspend_zio_root; /* root of all suspended I/O */ - kmutex_t spa_suspend_lock; /* protects suspend_zio_root */ - kcondvar_t spa_suspend_cv; /* notification of resume */ - uint8_t spa_suspended; /* pool is suspended */ - uint8_t spa_claiming; /* pool is doing zil_claim() */ - boolean_t spa_debug; /* debug enabled? */ - boolean_t spa_is_root; /* pool is root */ - int spa_minref; /* num refs when first opened */ - int spa_mode; /* FREAD | FWRITE */ - spa_log_state_t spa_log_state; /* log state */ - uint64_t spa_autoexpand; /* lun expansion on/off */ - ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */ - uint64_t spa_ddt_stat_object; /* DDT statistics */ - uint64_t spa_dedup_dspace; /* Cache get_dedup_dspace() */ - uint64_t spa_dedup_ditto; /* dedup ditto threshold */ - uint64_t spa_dedup_checksum; /* default dedup checksum */ - uint64_t spa_dspace; /* dspace in normal class */ - kmutex_t spa_vdev_top_lock; /* dueling offline/remove */ - kmutex_t spa_proc_lock; /* protects spa_proc* */ - kcondvar_t spa_proc_cv; /* spa_proc_state transitions */ - spa_proc_state_t spa_proc_state; /* see definition */ - proc_t *spa_proc; /* "zpool-poolname" process */ - uint64_t spa_did; /* if procp != p0, did of t1 */ - boolean_t spa_autoreplace; /* autoreplace set in open */ - int spa_vdev_locks; /* locks grabbed */ - uint64_t spa_creation_version; /* version at pool creation */ - uint64_t spa_prev_software_version; /* See ub_software_version */ - uint64_t spa_feat_for_write_obj; /* required to write to pool */ - uint64_t spa_feat_for_read_obj; /* required to read from pool */ - uint64_t spa_feat_desc_obj; /* Feature descriptions */ - uint64_t spa_feat_enabled_txg_obj; /* Feature enabled txg */ - kmutex_t spa_feat_stats_lock; /* protects spa_feat_stats */ - nvlist_t *spa_feat_stats; /* Cache of enabled features */ - /* cache feature refcounts */ - uint64_t spa_feat_refcount_cache[SPA_FEATURES]; - taskqid_t spa_deadman_tqid; /* Task id */ - uint64_t spa_deadman_calls; /* number of deadman calls */ - hrtime_t spa_sync_starttime; /* starting time of spa_sync */ - uint64_t spa_deadman_synctime; /* deadman expiration timer */ - uint64_t spa_all_vdev_zaps; /* ZAP of per-vd ZAP obj #s */ - spa_avz_action_t spa_avz_action; /* destroy/rebuild AVZ? */ - uint64_t spa_errata; /* errata issues detected */ - spa_stats_t spa_stats; /* assorted spa statistics */ - hrtime_t spa_ccw_fail_time; /* Conf cache write fail time */ - taskq_t *spa_zvol_taskq; /* Taskq for minor management */ - taskq_t *spa_prefetch_taskq; /* Taskq for prefetch threads */ - uint64_t spa_multihost; /* multihost aware (mmp) */ - mmp_thread_t spa_mmp; /* multihost mmp thread */ - - /* - * spa_refcount & spa_config_lock must be the last elements - * because refcount_t changes size based on compilation options. - * In order for the MDB module to function correctly, the other - * fields must remain in the same location. - */ - spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */ - refcount_t spa_refcount; /* number of opens */ - - taskq_t *spa_upgrade_taskq; /* taskq for upgrade jobs */ -}; - -extern char *spa_config_path; - -extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, - task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent); -extern void spa_taskq_dispatch_sync(spa_t *, zio_type_t t, zio_taskq_type_t q, - task_func_t *func, void *arg, uint_t flags); - - -#ifdef __cplusplus -} -#endif - -#endif /* _SYS_SPA_IMPL_H */ diff --git a/zfs/module/zfs/dmu_traverse.c b/zfs/module/zfs/dmu_traverse.c deleted file mode 100644 index c9171eeff59f..000000000000 --- a/zfs/module/zfs/dmu_traverse.c +++ /dev/null @@ -1,752 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License (the "License"). - * You may not use this file except in compliance with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ -/* - * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. - * Copyright (c) 2012, 2016 by Delphix. All rights reserved. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -int32_t zfs_pd_bytes_max = 50 * 1024 * 1024; /* 50MB */ -int32_t send_holes_without_birth_time = 1; - -typedef struct prefetch_data { - kmutex_t pd_mtx; - kcondvar_t pd_cv; - int32_t pd_bytes_fetched; - int pd_flags; - boolean_t pd_cancel; - boolean_t pd_exited; - zbookmark_phys_t pd_resume; -} prefetch_data_t; - -typedef struct traverse_data { - spa_t *td_spa; - uint64_t td_objset; - blkptr_t *td_rootbp; - uint64_t td_min_txg; - zbookmark_phys_t *td_resume; - int td_flags; - prefetch_data_t *td_pfd; - boolean_t td_paused; - uint64_t td_hole_birth_enabled_txg; - blkptr_cb_t *td_func; - void *td_arg; - boolean_t td_realloc_possible; -} traverse_data_t; - -static int traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp, - uint64_t objset, uint64_t object); -static void prefetch_dnode_metadata(traverse_data_t *td, const dnode_phys_t *, - uint64_t objset, uint64_t object); - -static int -traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg) -{ - traverse_data_t *td = arg; - zbookmark_phys_t zb; - - if (BP_IS_HOLE(bp)) - return (0); - - if (claim_txg == 0 && bp->blk_birth >= spa_first_txg(td->td_spa)) - return (0); - - SET_BOOKMARK(&zb, td->td_objset, ZB_ZIL_OBJECT, ZB_ZIL_LEVEL, - bp->blk_cksum.zc_word[ZIL_ZC_SEQ]); - - (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL, td->td_arg); - - return (0); -} - -static int -traverse_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg) -{ - traverse_data_t *td = arg; - - if (lrc->lrc_txtype == TX_WRITE) { - lr_write_t *lr = (lr_write_t *)lrc; - blkptr_t *bp = &lr->lr_blkptr; - zbookmark_phys_t zb; - - if (BP_IS_HOLE(bp)) - return (0); - - if (claim_txg == 0 || bp->blk_birth < claim_txg) - return (0); - - SET_BOOKMARK(&zb, td->td_objset, lr->lr_foid, - ZB_ZIL_LEVEL, lr->lr_offset / BP_GET_LSIZE(bp)); - - (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL, - td->td_arg); - } - return (0); -} - -static void -traverse_zil(traverse_data_t *td, zil_header_t *zh) -{ - uint64_t claim_txg = zh->zh_claim_txg; - zilog_t *zilog; - - /* - * We only want to visit blocks that have been claimed but not yet - * replayed; plus, in read-only mode, blocks that are already stable. - */ - if (claim_txg == 0 && spa_writeable(td->td_spa)) - return; - - zilog = zil_alloc(spa_get_dsl(td->td_spa)->dp_meta_objset, zh); - - (void) zil_parse(zilog, traverse_zil_block, traverse_zil_record, td, - claim_txg); - - zil_free(zilog); -} - -typedef enum resume_skip { - RESUME_SKIP_ALL, - RESUME_SKIP_NONE, - RESUME_SKIP_CHILDREN -} resume_skip_t; - -/* - * Returns RESUME_SKIP_ALL if td indicates that we are resuming a traversal and - * the block indicated by zb does not need to be visited at all. Returns - * RESUME_SKIP_CHILDREN if we are resuming a post traversal and we reach the - * resume point. This indicates that this block should be visited but not its - * children (since they must have been visited in a previous traversal). - * Otherwise returns RESUME_SKIP_NONE. - */ -static resume_skip_t -resume_skip_check(traverse_data_t *td, const dnode_phys_t *dnp, - const zbookmark_phys_t *zb) -{ - if (td->td_resume != NULL && !ZB_IS_ZERO(td->td_resume)) { - /* - * If we already visited this bp & everything below, - * don't bother doing it again. - */ - if (zbookmark_subtree_completed(dnp, zb, td->td_resume)) - return (RESUME_SKIP_ALL); - - /* - * If we found the block we're trying to resume from, zero - * the bookmark out to indicate that we have resumed. - */ - if (bcmp(zb, td->td_resume, sizeof (*zb)) == 0) { - bzero(td->td_resume, sizeof (*zb)); - if (td->td_flags & TRAVERSE_POST) - return (RESUME_SKIP_CHILDREN); - } - } - return (RESUME_SKIP_NONE); -} - -static void -traverse_prefetch_metadata(traverse_data_t *td, - const blkptr_t *bp, const zbookmark_phys_t *zb) -{ - arc_flags_t flags = ARC_FLAG_NOWAIT | ARC_FLAG_PREFETCH; - - if (!(td->td_flags & TRAVERSE_PREFETCH_METADATA)) - return; - /* - * If we are in the process of resuming, don't prefetch, because - * some children will not be needed (and in fact may have already - * been freed). - */ - if (td->td_resume != NULL && !ZB_IS_ZERO(td->td_resume)) - return; - if (BP_IS_HOLE(bp) || bp->blk_birth <= td->td_min_txg) - return; - if (BP_GET_LEVEL(bp) == 0 && BP_GET_TYPE(bp) != DMU_OT_DNODE) - return; - - (void) arc_read(NULL, td->td_spa, bp, NULL, NULL, - ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); -} - -static boolean_t -prefetch_needed(prefetch_data_t *pfd, const blkptr_t *bp) -{ - ASSERT(pfd->pd_flags & TRAVERSE_PREFETCH_DATA); - if (BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp) || - BP_GET_TYPE(bp) == DMU_OT_INTENT_LOG) - return (B_FALSE); - return (B_TRUE); -} - -static int -traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp, - const blkptr_t *bp, const zbookmark_phys_t *zb) -{ - int err = 0; - arc_buf_t *buf = NULL; - prefetch_data_t *pd = td->td_pfd; - - switch (resume_skip_check(td, dnp, zb)) { - case RESUME_SKIP_ALL: - return (0); - case RESUME_SKIP_CHILDREN: - goto post; - case RESUME_SKIP_NONE: - break; - default: - ASSERT(0); - } - - if (bp->blk_birth == 0) { - /* - * Since this block has a birth time of 0 it must be one of - * two things: a hole created before the - * SPA_FEATURE_HOLE_BIRTH feature was enabled, or a hole - * which has always been a hole in an object. - * - * If a file is written sparsely, then the unwritten parts of - * the file were "always holes" -- that is, they have been - * holes since this object was allocated. However, we (and - * our callers) can not necessarily tell when an object was - * allocated. Therefore, if it's possible that this object - * was freed and then its object number reused, we need to - * visit all the holes with birth==0. - * - * If it isn't possible that the object number was reused, - * then if SPA_FEATURE_HOLE_BIRTH was enabled before we wrote - * all the blocks we will visit as part of this traversal, - * then this hole must have always existed, so we can skip - * it. We visit blocks born after (exclusive) td_min_txg. - * - * Note that the meta-dnode cannot be reallocated. - */ - if (!send_holes_without_birth_time && - (!td->td_realloc_possible || - zb->zb_object == DMU_META_DNODE_OBJECT) && - td->td_hole_birth_enabled_txg <= td->td_min_txg) - return (0); - } else if (bp->blk_birth <= td->td_min_txg) { - return (0); - } - - if (pd != NULL && !pd->pd_exited && prefetch_needed(pd, bp)) { - uint64_t size = BP_GET_LSIZE(bp); - mutex_enter(&pd->pd_mtx); - ASSERT(pd->pd_bytes_fetched >= 0); - while (pd->pd_bytes_fetched < size && !pd->pd_exited) - cv_wait_sig(&pd->pd_cv, &pd->pd_mtx); - pd->pd_bytes_fetched -= size; - cv_broadcast(&pd->pd_cv); - mutex_exit(&pd->pd_mtx); - } - - if (BP_IS_HOLE(bp)) { - err = td->td_func(td->td_spa, NULL, bp, zb, dnp, td->td_arg); - if (err != 0) - goto post; - return (0); - } - - if (td->td_flags & TRAVERSE_PRE) { - err = td->td_func(td->td_spa, NULL, bp, zb, dnp, - td->td_arg); - if (err == TRAVERSE_VISIT_NO_CHILDREN) - return (0); - if (err != 0) - goto post; - } - - if (BP_GET_LEVEL(bp) > 0) { - uint32_t flags = ARC_FLAG_WAIT; - int32_t i; - int32_t epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT; - zbookmark_phys_t *czb; - - err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, - ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); - if (err != 0) - goto post; - - czb = kmem_alloc(sizeof (zbookmark_phys_t), KM_SLEEP); - - for (i = 0; i < epb; i++) { - SET_BOOKMARK(czb, zb->zb_objset, zb->zb_object, - zb->zb_level - 1, - zb->zb_blkid * epb + i); - traverse_prefetch_metadata(td, - &((blkptr_t *)buf->b_data)[i], czb); - } - - /* recursively visitbp() blocks below this */ - for (i = 0; i < epb; i++) { - SET_BOOKMARK(czb, zb->zb_objset, zb->zb_object, - zb->zb_level - 1, - zb->zb_blkid * epb + i); - err = traverse_visitbp(td, dnp, - &((blkptr_t *)buf->b_data)[i], czb); - if (err != 0) - break; - } - - kmem_free(czb, sizeof (zbookmark_phys_t)); - - } else if (BP_GET_TYPE(bp) == DMU_OT_DNODE) { - uint32_t flags = ARC_FLAG_WAIT; - int32_t i; - int32_t epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT; - dnode_phys_t *child_dnp; - - err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, - ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); - if (err != 0) - goto post; - child_dnp = buf->b_data; - - for (i = 0; i < epb; i += child_dnp[i].dn_extra_slots + 1) { - prefetch_dnode_metadata(td, &child_dnp[i], - zb->zb_objset, zb->zb_blkid * epb + i); - } - - /* recursively visitbp() blocks below this */ - for (i = 0; i < epb; i += child_dnp[i].dn_extra_slots + 1) { - err = traverse_dnode(td, &child_dnp[i], - zb->zb_objset, zb->zb_blkid * epb + i); - if (err != 0) - break; - } - } else if (BP_GET_TYPE(bp) == DMU_OT_OBJSET) { - arc_flags_t flags = ARC_FLAG_WAIT; - objset_phys_t *osp; - - err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, - ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); - if (err != 0) - goto post; - - osp = buf->b_data; - prefetch_dnode_metadata(td, &osp->os_meta_dnode, zb->zb_objset, - DMU_META_DNODE_OBJECT); - /* - * See the block comment above for the goal of this variable. - * If the maxblkid of the meta-dnode is 0, then we know that - * we've never had more than DNODES_PER_BLOCK objects in the - * dataset, which means we can't have reused any object ids. - */ - if (osp->os_meta_dnode.dn_maxblkid == 0) - td->td_realloc_possible = B_FALSE; - - if (arc_buf_size(buf) >= sizeof (objset_phys_t)) { - prefetch_dnode_metadata(td, &osp->os_groupused_dnode, - zb->zb_objset, DMU_GROUPUSED_OBJECT); - prefetch_dnode_metadata(td, &osp->os_userused_dnode, - zb->zb_objset, DMU_USERUSED_OBJECT); - } - - err = traverse_dnode(td, &osp->os_meta_dnode, zb->zb_objset, - DMU_META_DNODE_OBJECT); - if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { - err = traverse_dnode(td, &osp->os_groupused_dnode, - zb->zb_objset, DMU_GROUPUSED_OBJECT); - } - if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { - err = traverse_dnode(td, &osp->os_userused_dnode, - zb->zb_objset, DMU_USERUSED_OBJECT); - } - } - - if (buf) - arc_buf_destroy(buf, &buf); - -post: - if (err == 0 && (td->td_flags & TRAVERSE_POST)) - err = td->td_func(td->td_spa, NULL, bp, zb, dnp, td->td_arg); - - if ((td->td_flags & TRAVERSE_HARD) && (err == EIO || err == ECKSUM)) { - /* - * Ignore this disk error as requested by the HARD flag, - * and continue traversal. - */ - err = 0; - } - - /* - * If we are stopping here, set td_resume. - */ - if (td->td_resume != NULL && err != 0 && !td->td_paused) { - td->td_resume->zb_objset = zb->zb_objset; - td->td_resume->zb_object = zb->zb_object; - td->td_resume->zb_level = 0; - /* - * If we have stopped on an indirect block (e.g. due to - * i/o error), we have not visited anything below it. - * Set the bookmark to the first level-0 block that we need - * to visit. This way, the resuming code does not need to - * deal with resuming from indirect blocks. - * - * Note, if zb_level <= 0, dnp may be NULL, so we don't want - * to dereference it. - */ - td->td_resume->zb_blkid = zb->zb_blkid; - if (zb->zb_level > 0) { - td->td_resume->zb_blkid <<= zb->zb_level * - (dnp->dn_indblkshift - SPA_BLKPTRSHIFT); - } - td->td_paused = B_TRUE; - } - - return (err); -} - -static void -prefetch_dnode_metadata(traverse_data_t *td, const dnode_phys_t *dnp, - uint64_t objset, uint64_t object) -{ - int j; - zbookmark_phys_t czb; - - for (j = 0; j < dnp->dn_nblkptr; j++) { - SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j); - traverse_prefetch_metadata(td, &dnp->dn_blkptr[j], &czb); - } - - if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) { - SET_BOOKMARK(&czb, objset, object, 0, DMU_SPILL_BLKID); - traverse_prefetch_metadata(td, DN_SPILL_BLKPTR(dnp), &czb); - } -} - -static int -traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp, - uint64_t objset, uint64_t object) -{ - int j, err = 0; - zbookmark_phys_t czb; - - if (object != DMU_META_DNODE_OBJECT && td->td_resume != NULL && - object < td->td_resume->zb_object) - return (0); - - if (td->td_flags & TRAVERSE_PRE) { - SET_BOOKMARK(&czb, objset, object, ZB_DNODE_LEVEL, - ZB_DNODE_BLKID); - err = td->td_func(td->td_spa, NULL, NULL, &czb, dnp, - td->td_arg); - if (err == TRAVERSE_VISIT_NO_CHILDREN) - return (0); - if (err != 0) - return (err); - } - - for (j = 0; j < dnp->dn_nblkptr; j++) { - SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j); - err = traverse_visitbp(td, dnp, &dnp->dn_blkptr[j], &czb); - if (err != 0) - break; - } - - if (err == 0 && (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR)) { - SET_BOOKMARK(&czb, objset, object, 0, DMU_SPILL_BLKID); - err = traverse_visitbp(td, dnp, DN_SPILL_BLKPTR(dnp), &czb); - } - - if (err == 0 && (td->td_flags & TRAVERSE_POST)) { - SET_BOOKMARK(&czb, objset, object, ZB_DNODE_LEVEL, - ZB_DNODE_BLKID); - err = td->td_func(td->td_spa, NULL, NULL, &czb, dnp, - td->td_arg); - if (err == TRAVERSE_VISIT_NO_CHILDREN) - return (0); - if (err != 0) - return (err); - } - return (err); -} - -/* ARGSUSED */ -static int -traverse_prefetcher(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, - const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) -{ - prefetch_data_t *pfd = arg; - arc_flags_t aflags = ARC_FLAG_NOWAIT | ARC_FLAG_PREFETCH; - - ASSERT(pfd->pd_bytes_fetched >= 0); - if (bp == NULL) - return (0); - if (pfd->pd_cancel) - return (SET_ERROR(EINTR)); - - if (!prefetch_needed(pfd, bp)) - return (0); - - mutex_enter(&pfd->pd_mtx); - while (!pfd->pd_cancel && pfd->pd_bytes_fetched >= zfs_pd_bytes_max) - cv_wait_sig(&pfd->pd_cv, &pfd->pd_mtx); - pfd->pd_bytes_fetched += BP_GET_LSIZE(bp); - cv_broadcast(&pfd->pd_cv); - mutex_exit(&pfd->pd_mtx); - - (void) arc_read(NULL, spa, bp, NULL, NULL, ZIO_PRIORITY_ASYNC_READ, - ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE, &aflags, zb); - - return (0); -} - -static void -traverse_prefetch_thread(void *arg) -{ - traverse_data_t *td_main = arg; - traverse_data_t td = *td_main; - zbookmark_phys_t czb; - fstrans_cookie_t cookie = spl_fstrans_mark(); - - td.td_func = traverse_prefetcher; - td.td_arg = td_main->td_pfd; - td.td_pfd = NULL; - td.td_resume = &td_main->td_pfd->pd_resume; - - SET_BOOKMARK(&czb, td.td_objset, - ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); - (void) traverse_visitbp(&td, NULL, td.td_rootbp, &czb); - - mutex_enter(&td_main->td_pfd->pd_mtx); - td_main->td_pfd->pd_exited = B_TRUE; - cv_broadcast(&td_main->td_pfd->pd_cv); - mutex_exit(&td_main->td_pfd->pd_mtx); - spl_fstrans_unmark(cookie); -} - -/* - * NB: dataset must not be changing on-disk (eg, is a snapshot or we are - * in syncing context). - */ -static int -traverse_impl(spa_t *spa, dsl_dataset_t *ds, uint64_t objset, blkptr_t *rootbp, - uint64_t txg_start, zbookmark_phys_t *resume, int flags, - blkptr_cb_t func, void *arg) -{ - traverse_data_t *td; - prefetch_data_t *pd; - zbookmark_phys_t *czb; - int err; - - ASSERT(ds == NULL || objset == ds->ds_object); - ASSERT(!(flags & TRAVERSE_PRE) || !(flags & TRAVERSE_POST)); - - td = kmem_alloc(sizeof (traverse_data_t), KM_SLEEP); - pd = kmem_zalloc(sizeof (prefetch_data_t), KM_SLEEP); - czb = kmem_alloc(sizeof (zbookmark_phys_t), KM_SLEEP); - - td->td_spa = spa; - td->td_objset = objset; - td->td_rootbp = rootbp; - td->td_min_txg = txg_start; - td->td_resume = resume; - td->td_func = func; - td->td_arg = arg; - td->td_pfd = pd; - td->td_flags = flags; - td->td_paused = B_FALSE; - td->td_realloc_possible = (txg_start == 0 ? B_FALSE : B_TRUE); - - if (spa_feature_is_active(spa, SPA_FEATURE_HOLE_BIRTH)) { - VERIFY(spa_feature_enabled_txg(spa, - SPA_FEATURE_HOLE_BIRTH, &td->td_hole_birth_enabled_txg)); - } else { - td->td_hole_birth_enabled_txg = UINT64_MAX; - } - - pd->pd_flags = flags; - if (resume != NULL) - pd->pd_resume = *resume; - mutex_init(&pd->pd_mtx, NULL, MUTEX_DEFAULT, NULL); - cv_init(&pd->pd_cv, NULL, CV_DEFAULT, NULL); - - SET_BOOKMARK(czb, td->td_objset, - ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); - - /* See comment on ZIL traversal in dsl_scan_visitds. */ - if (ds != NULL && !ds->ds_is_snapshot && !BP_IS_HOLE(rootbp)) { - uint32_t flags = ARC_FLAG_WAIT; - objset_phys_t *osp; - arc_buf_t *buf; - - err = arc_read(NULL, td->td_spa, rootbp, - arc_getbuf_func, &buf, - ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, czb); - if (err != 0) - return (err); - - if (err != 0) { - /* - * If both TRAVERSE_HARD and TRAVERSE_PRE are set, - * continue to visitbp so that td_func can be called - * in pre stage, and err will reset to zero. - */ - if (!(td->td_flags & TRAVERSE_HARD) || - !(td->td_flags & TRAVERSE_PRE)) - return (err); - } else { - osp = buf->b_data; - traverse_zil(td, &osp->os_zil_header); - arc_buf_destroy(buf, &buf); - } - } - - if (!(flags & TRAVERSE_PREFETCH_DATA) || - taskq_dispatch(spa->spa_prefetch_taskq, traverse_prefetch_thread, - td, TQ_NOQUEUE) == TASKQID_INVALID) - pd->pd_exited = B_TRUE; - - err = traverse_visitbp(td, NULL, rootbp, czb); - - mutex_enter(&pd->pd_mtx); - pd->pd_cancel = B_TRUE; - cv_broadcast(&pd->pd_cv); - while (!pd->pd_exited) - cv_wait_sig(&pd->pd_cv, &pd->pd_mtx); - mutex_exit(&pd->pd_mtx); - - mutex_destroy(&pd->pd_mtx); - cv_destroy(&pd->pd_cv); - - kmem_free(czb, sizeof (zbookmark_phys_t)); - kmem_free(pd, sizeof (struct prefetch_data)); - kmem_free(td, sizeof (struct traverse_data)); - - return (err); -} - -/* - * NB: dataset must not be changing on-disk (eg, is a snapshot or we are - * in syncing context). - */ -int -traverse_dataset_resume(dsl_dataset_t *ds, uint64_t txg_start, - zbookmark_phys_t *resume, - int flags, blkptr_cb_t func, void *arg) -{ - return (traverse_impl(ds->ds_dir->dd_pool->dp_spa, ds, ds->ds_object, - &dsl_dataset_phys(ds)->ds_bp, txg_start, resume, flags, func, arg)); -} - -int -traverse_dataset(dsl_dataset_t *ds, uint64_t txg_start, - int flags, blkptr_cb_t func, void *arg) -{ - return (traverse_dataset_resume(ds, txg_start, NULL, flags, func, arg)); -} - -int -traverse_dataset_destroyed(spa_t *spa, blkptr_t *blkptr, - uint64_t txg_start, zbookmark_phys_t *resume, int flags, - blkptr_cb_t func, void *arg) -{ - return (traverse_impl(spa, NULL, ZB_DESTROYED_OBJSET, - blkptr, txg_start, resume, flags, func, arg)); -} - -/* - * NB: pool must not be changing on-disk (eg, from zdb or sync context). - */ -int -traverse_pool(spa_t *spa, uint64_t txg_start, int flags, - blkptr_cb_t func, void *arg) -{ - int err; - uint64_t obj; - dsl_pool_t *dp = spa_get_dsl(spa); - objset_t *mos = dp->dp_meta_objset; - boolean_t hard = (flags & TRAVERSE_HARD); - - /* visit the MOS */ - err = traverse_impl(spa, NULL, 0, spa_get_rootblkptr(spa), - txg_start, NULL, flags, func, arg); - if (err != 0) - return (err); - - /* visit each dataset */ - for (obj = 1; err == 0; - err = dmu_object_next(mos, &obj, B_FALSE, txg_start)) { - dmu_object_info_t doi; - - err = dmu_object_info(mos, obj, &doi); - if (err != 0) { - if (hard) - continue; - break; - } - - if (doi.doi_bonus_type == DMU_OT_DSL_DATASET) { - dsl_dataset_t *ds; - uint64_t txg = txg_start; - - dsl_pool_config_enter(dp, FTAG); - err = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); - dsl_pool_config_exit(dp, FTAG); - if (err != 0) { - if (hard) - continue; - break; - } - if (dsl_dataset_phys(ds)->ds_prev_snap_txg > txg) - txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; - err = traverse_dataset(ds, txg, flags, func, arg); - dsl_dataset_rele(ds, FTAG); - if (err != 0) - break; - } - } - if (err == ESRCH) - err = 0; - return (err); -} - -#if defined(_KERNEL) && defined(HAVE_SPL) -EXPORT_SYMBOL(traverse_dataset); -EXPORT_SYMBOL(traverse_pool); - -module_param(zfs_pd_bytes_max, int, 0644); -MODULE_PARM_DESC(zfs_pd_bytes_max, "Max number of bytes to prefetch"); - -module_param_named(ignore_hole_birth, send_holes_without_birth_time, int, 0644); -MODULE_PARM_DESC(ignore_hole_birth, "Alias for send_holes_without_birth_time"); - -module_param_named(send_holes_without_birth_time, - send_holes_without_birth_time, int, 0644); -MODULE_PARM_DESC(send_holes_without_birth_time, - "Ignore hole_birth txg for zfs send"); -#endif diff --git a/zfs/module/zfs/spa.c b/zfs/module/zfs/spa.c deleted file mode 100644 index b777afc60242..000000000000 --- a/zfs/module/zfs/spa.c +++ /dev/null @@ -1,7321 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License (the "License"). - * You may not use this file except in compliance with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ - -/* - * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. - * Copyright (c) 2011, 2017 by Delphix. All rights reserved. - * Copyright (c) 2015, Nexenta Systems, Inc. All rights reserved. - * Copyright (c) 2013, 2014, Nexenta Systems, Inc. All rights reserved. - * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. - * Copyright 2013 Saso Kiselkov. All rights reserved. - * Copyright (c) 2014 Integros [integros.com] - * Copyright 2016 Toomas Soome - * Copyright (c) 2016 Actifio, Inc. All rights reserved. - * Copyright (c) 2017 Datto Inc. - * Copyright 2017 Joyent, Inc. - */ - -/* - * SPA: Storage Pool Allocator - * - * This file contains all the routines used when modifying on-disk SPA state. - * This includes opening, importing, destroying, exporting a pool, and syncing a - * pool. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#ifdef _KERNEL -#include -#include -#include -#include -#include -#include -#include -#include -#endif /* _KERNEL */ - -#include "zfs_prop.h" -#include "zfs_comutil.h" - -/* - * The interval, in seconds, at which failed configuration cache file writes - * should be retried. - */ -static int zfs_ccw_retry_interval = 300; - -typedef enum zti_modes { - ZTI_MODE_FIXED, /* value is # of threads (min 1) */ - ZTI_MODE_BATCH, /* cpu-intensive; value is ignored */ - ZTI_MODE_NULL, /* don't create a taskq */ - ZTI_NMODES -} zti_modes_t; - -#define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) } -#define ZTI_PCT(n) { ZTI_MODE_ONLINE_PERCENT, (n), 1 } -#define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 } -#define ZTI_NULL { ZTI_MODE_NULL, 0, 0 } - -#define ZTI_N(n) ZTI_P(n, 1) -#define ZTI_ONE ZTI_N(1) - -typedef struct zio_taskq_info { - zti_modes_t zti_mode; - uint_t zti_value; - uint_t zti_count; -} zio_taskq_info_t; - -static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = { - "iss", "iss_h", "int", "int_h" -}; - -/* - * This table defines the taskq settings for each ZFS I/O type. When - * initializing a pool, we use this table to create an appropriately sized - * taskq. Some operations are low volume and therefore have a small, static - * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE - * macros. Other operations process a large amount of data; the ZTI_BATCH - * macro causes us to create a taskq oriented for throughput. Some operations - * are so high frequency and short-lived that the taskq itself can become a a - * point of lock contention. The ZTI_P(#, #) macro indicates that we need an - * additional degree of parallelism specified by the number of threads per- - * taskq and the number of taskqs; when dispatching an event in this case, the - * particular taskq is chosen at random. - * - * The different taskq priorities are to handle the different contexts (issue - * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that - * need to be handled with minimum delay. - */ -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 }, /* NULL */ - { ZTI_N(8), ZTI_NULL, ZTI_P(12, 8), ZTI_NULL }, /* READ */ - { ZTI_BATCH, ZTI_N(5), ZTI_P(12, 8), ZTI_N(5) }, /* WRITE */ - { ZTI_P(12, 8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* FREE */ - { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* CLAIM */ - { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* IOCTL */ -}; - -static sysevent_t *spa_event_create(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl, - const char *name); -static void spa_event_post(sysevent_t *ev); -static void spa_sync_version(void *arg, dmu_tx_t *tx); -static void spa_sync_props(void *arg, dmu_tx_t *tx); -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 = 75; /* 1 thread per cpu in pset */ -id_t zio_taskq_psrset_bind = PS_NONE; -boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */ -uint_t zio_taskq_basedc = 80; /* base duty cycle */ - -boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */ - -/* - * This (illegal) pool name is used when temporarily importing a spa_t in order - * to get the vdev stats associated with the imported devices. - */ -#define TRYIMPORT_NAME "$import" - -/* - * ========================================================================== - * SPA properties routines - * ========================================================================== - */ - -/* - * Add a (source=src, propname=propval) list to an nvlist. - */ -static void -spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, - uint64_t intval, zprop_source_t src) -{ - const char *propname = zpool_prop_to_name(prop); - nvlist_t *propval; - - VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); - VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0); - - if (strval != NULL) - VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0); - else - VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0); - - VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0); - nvlist_free(propval); -} - -/* - * Get property values from the spa configuration. - */ -static void -spa_prop_get_config(spa_t *spa, nvlist_t **nvp) -{ - vdev_t *rvd = spa->spa_root_vdev; - dsl_pool_t *pool = spa->spa_dsl_pool; - uint64_t size, alloc, cap, version; - const zprop_source_t src = ZPROP_SRC_NONE; - spa_config_dirent_t *dp; - metaslab_class_t *mc = spa_normal_class(spa); - - ASSERT(MUTEX_HELD(&spa->spa_props_lock)); - - 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); - - spa_prop_add_list(*nvp, ZPOOL_PROP_FRAGMENTATION, NULL, - metaslab_class_fragmentation(mc), src); - spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, - metaslab_class_expandable_space(mc), src); - spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL, - (spa_mode(spa) == FREAD), src); - - cap = (size == 0) ? 0 : (alloc * 100 / size); - spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src); - - spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL, - ddt_get_pool_dedup_ratio(spa), src); - - spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL, - rvd->vdev_state, src); - - version = spa_version(spa); - if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION)) { - spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, - version, ZPROP_SRC_DEFAULT); - } else { - spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, - version, ZPROP_SRC_LOCAL); - } - } - - if (pool != NULL) { - /* - * The $FREE directory was introduced in SPA_VERSION_DEADLISTS, - * when opening pools before this version freedir will be NULL. - */ - if (pool->dp_free_dir != NULL) { - spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL, - dsl_dir_phys(pool->dp_free_dir)->dd_used_bytes, - src); - } else { - spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, - NULL, 0, src); - } - - if (pool->dp_leak_dir != NULL) { - spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, NULL, - dsl_dir_phys(pool->dp_leak_dir)->dd_used_bytes, - src); - } else { - spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, - NULL, 0, src); - } - } - - spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), 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, - 0, ZPROP_SRC_LOCAL); - - if (spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_BLOCKS)) { - spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL, - MIN(zfs_max_recordsize, SPA_MAXBLOCKSIZE), ZPROP_SRC_NONE); - } else { - spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL, - SPA_OLD_MAXBLOCKSIZE, ZPROP_SRC_NONE); - } - - if (spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_DNODE)) { - spa_prop_add_list(*nvp, ZPOOL_PROP_MAXDNODESIZE, NULL, - DNODE_MAX_SIZE, ZPROP_SRC_NONE); - } else { - spa_prop_add_list(*nvp, ZPOOL_PROP_MAXDNODESIZE, NULL, - DNODE_MIN_SIZE, ZPROP_SRC_NONE); - } - - if ((dp = list_head(&spa->spa_config_list)) != NULL) { - if (dp->scd_path == NULL) { - spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, - "none", 0, ZPROP_SRC_LOCAL); - } else if (strcmp(dp->scd_path, spa_config_path) != 0) { - spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, - dp->scd_path, 0, ZPROP_SRC_LOCAL); - } - } -} - -/* - * Get zpool property values. - */ -int -spa_prop_get(spa_t *spa, nvlist_t **nvp) -{ - objset_t *mos = spa->spa_meta_objset; - zap_cursor_t zc; - zap_attribute_t za; - int err; - - err = nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP); - if (err) - return (err); - - mutex_enter(&spa->spa_props_lock); - - /* - * Get properties from the spa config. - */ - spa_prop_get_config(spa, nvp); - - /* If no pool property object, no more prop to get. */ - if (mos == NULL || spa->spa_pool_props_object == 0) { - mutex_exit(&spa->spa_props_lock); - goto out; - } - - /* - * Get properties from the MOS pool property object. - */ - for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); - (err = zap_cursor_retrieve(&zc, &za)) == 0; - zap_cursor_advance(&zc)) { - uint64_t intval = 0; - char *strval = NULL; - zprop_source_t src = ZPROP_SRC_DEFAULT; - zpool_prop_t prop; - - if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL) - continue; - - switch (za.za_integer_length) { - case 8: - /* integer property */ - if (za.za_first_integer != - zpool_prop_default_numeric(prop)) - src = ZPROP_SRC_LOCAL; - - if (prop == ZPOOL_PROP_BOOTFS) { - dsl_pool_t *dp; - dsl_dataset_t *ds = NULL; - - dp = spa_get_dsl(spa); - dsl_pool_config_enter(dp, FTAG); - if ((err = dsl_dataset_hold_obj(dp, - za.za_first_integer, FTAG, &ds))) { - dsl_pool_config_exit(dp, FTAG); - break; - } - - strval = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, - KM_SLEEP); - dsl_dataset_name(ds, strval); - dsl_dataset_rele(ds, FTAG); - dsl_pool_config_exit(dp, FTAG); - } else { - strval = NULL; - intval = za.za_first_integer; - } - - spa_prop_add_list(*nvp, prop, strval, intval, src); - - if (strval != NULL) - kmem_free(strval, ZFS_MAX_DATASET_NAME_LEN); - - break; - - case 1: - /* string property */ - strval = kmem_alloc(za.za_num_integers, KM_SLEEP); - err = zap_lookup(mos, spa->spa_pool_props_object, - za.za_name, 1, za.za_num_integers, strval); - if (err) { - kmem_free(strval, za.za_num_integers); - break; - } - spa_prop_add_list(*nvp, prop, strval, 0, src); - kmem_free(strval, za.za_num_integers); - break; - - default: - break; - } - } - zap_cursor_fini(&zc); - mutex_exit(&spa->spa_props_lock); -out: - if (err && err != ENOENT) { - nvlist_free(*nvp); - *nvp = NULL; - return (err); - } - - return (0); -} - -/* - * Validate the given pool properties nvlist and modify the list - * for the property values to be set. - */ -static int -spa_prop_validate(spa_t *spa, nvlist_t *props) -{ - nvpair_t *elem; - int error = 0, reset_bootfs = 0; - uint64_t objnum = 0; - boolean_t has_feature = B_FALSE; - - elem = NULL; - while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { - uint64_t intval; - 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 = SET_ERROR(EINVAL); - break; - } - - /* - * Sanitize the input. - */ - if (nvpair_type(elem) != DATA_TYPE_UINT64) { - error = SET_ERROR(EINVAL); - break; - } - - if (nvpair_value_uint64(elem, &intval) != 0) { - error = SET_ERROR(EINVAL); - break; - } - - if (intval != 0) { - error = SET_ERROR(EINVAL); - break; - } - - fname = strchr(propname, '@') + 1; - if (zfeature_lookup_name(fname, NULL) != 0) { - error = SET_ERROR(EINVAL); - break; - } - - has_feature = B_TRUE; - break; - - case ZPOOL_PROP_VERSION: - error = nvpair_value_uint64(elem, &intval); - if (!error && - (intval < spa_version(spa) || - intval > SPA_VERSION_BEFORE_FEATURES || - has_feature)) - error = SET_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 = SET_ERROR(EINVAL); - break; - - case ZPOOL_PROP_MULTIHOST: - error = nvpair_value_uint64(elem, &intval); - if (!error && intval > 1) - error = SET_ERROR(EINVAL); - - if (!error && !spa_get_hostid()) - error = SET_ERROR(ENOTSUP); - - 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 = SET_ERROR(ENOTSUP); - break; - } - - /* - * Make sure the vdev config is bootable - */ - if (!vdev_is_bootable(spa->spa_root_vdev)) { - error = SET_ERROR(ENOTSUP); - break; - } - - reset_bootfs = 1; - - error = nvpair_value_string(elem, &strval); - - if (!error) { - objset_t *os; - uint64_t propval; - - if (strval == NULL || strval[0] == '\0') { - objnum = zpool_prop_default_numeric( - ZPOOL_PROP_BOOTFS); - break; - } - - error = dmu_objset_hold(strval, FTAG, &os); - if (error) - break; - - /* - * Must be ZPL, and its property settings - * must be supported by GRUB (compression - * is not gzip, and large blocks or large - * dnodes are not used). - */ - - if (dmu_objset_type(os) != DMU_OST_ZFS) { - error = SET_ERROR(ENOTSUP); - } else if ((error = - dsl_prop_get_int_ds(dmu_objset_ds(os), - zfs_prop_to_name(ZFS_PROP_COMPRESSION), - &propval)) == 0 && - !BOOTFS_COMPRESS_VALID(propval)) { - error = SET_ERROR(ENOTSUP); - } else if ((error = - dsl_prop_get_int_ds(dmu_objset_ds(os), - zfs_prop_to_name(ZFS_PROP_DNODESIZE), - &propval)) == 0 && - propval != ZFS_DNSIZE_LEGACY) { - error = SET_ERROR(ENOTSUP); - } else { - objnum = dmu_objset_id(os); - } - dmu_objset_rele(os, FTAG); - } - break; - - case ZPOOL_PROP_FAILUREMODE: - error = nvpair_value_uint64(elem, &intval); - if (!error && intval > ZIO_FAILURE_MODE_PANIC) - error = SET_ERROR(EINVAL); - - /* - * This is a special case which only occurs when - * the pool has completely failed. This allows - * the user to change the in-core failmode property - * without syncing it out to disk (I/Os might - * currently be blocked). We do this by returning - * EIO to the caller (spa_prop_set) to trick it - * into thinking we encountered a property validation - * error. - */ - if (!error && spa_suspended(spa)) { - spa->spa_failmode = intval; - error = SET_ERROR(EIO); - } - break; - - case ZPOOL_PROP_CACHEFILE: - if ((error = nvpair_value_string(elem, &strval)) != 0) - break; - - if (strval[0] == '\0') - break; - - if (strcmp(strval, "none") == 0) - break; - - if (strval[0] != '/') { - error = SET_ERROR(EINVAL); - break; - } - - slash = strrchr(strval, '/'); - ASSERT(slash != NULL); - - if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || - strcmp(slash, "/..") == 0) - error = SET_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 = SET_ERROR(EINVAL); - break; - } - } - if (strlen(strval) > ZPROP_MAX_COMMENT) - error = SET_ERROR(E2BIG); - break; - - case ZPOOL_PROP_DEDUPDITTO: - if (spa_version(spa) < SPA_VERSION_DEDUP) - error = SET_ERROR(ENOTSUP); - else - error = nvpair_value_uint64(elem, &intval); - if (error == 0 && - intval != 0 && intval < ZIO_DEDUPDITTO_MIN) - error = SET_ERROR(EINVAL); - break; - - default: - break; - } - - if (error) - break; - } - - if (!error && reset_bootfs) { - error = nvlist_remove(props, - zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING); - - if (!error) { - error = nvlist_add_uint64(props, - zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum); - } - } - - return (error); -} - -void -spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync) -{ - char *cachefile; - spa_config_dirent_t *dp; - - if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), - &cachefile) != 0) - return; - - dp = kmem_alloc(sizeof (spa_config_dirent_t), - KM_SLEEP); - - if (cachefile[0] == '\0') - dp->scd_path = spa_strdup(spa_config_path); - else if (strcmp(cachefile, "none") == 0) - dp->scd_path = NULL; - else - dp->scd_path = spa_strdup(cachefile); - - list_insert_head(&spa->spa_config_list, dp); - if (need_sync) - spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); -} - -int -spa_prop_set(spa_t *spa, nvlist_t *nvp) -{ - int error; - nvpair_t *elem = NULL; - boolean_t need_sync = B_FALSE; - - if ((error = spa_prop_validate(spa, nvp)) != 0) - return (error); - - 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(spa->spa_name, NULL, - spa_sync_version, &ver, - 6, ZFS_SPACE_CHECK_RESERVED); - if (error) - return (error); - continue; - } - - need_sync = B_TRUE; - break; - } - - if (need_sync) { - return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props, - nvp, 6, ZFS_SPACE_CHECK_RESERVED)); - } - - return (0); -} - -/* - * If the bootfs property value is dsobj, clear it. - */ -void -spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) -{ - if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { - VERIFY(zap_remove(spa->spa_meta_objset, - spa->spa_pool_props_object, - zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0); - spa->spa_bootfs = 0; - } -} - -/*ARGSUSED*/ -static int -spa_change_guid_check(void *arg, dmu_tx_t *tx) -{ - spa_t *spa = dmu_tx_pool(tx)->dp_spa; - vdev_t *rvd = spa->spa_root_vdev; - uint64_t vdev_state; - ASSERTV(uint64_t *newguid = arg); - - 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 (SET_ERROR(ENXIO)); - - ASSERT3U(spa_guid(spa), !=, *newguid); - - return (0); -} - -static void -spa_change_guid_sync(void *arg, dmu_tx_t *tx) -{ - uint64_t *newguid = arg; - spa_t *spa = dmu_tx_pool(tx)->dp_spa; - 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(spa, "guid change", tx, "old=%llu new=%llu", - 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->spa_vdev_top_lock); - mutex_enter(&spa_namespace_lock); - guid = spa_generate_guid(NULL); - - error = dsl_sync_task(spa->spa_name, spa_change_guid_check, - spa_change_guid_sync, &guid, 5, ZFS_SPACE_CHECK_RESERVED); - - if (error == 0) { - spa_config_sync(spa, B_FALSE, B_TRUE); - spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_REGUID); - } - - mutex_exit(&spa_namespace_lock); - mutex_exit(&spa->spa_vdev_top_lock); - - return (error); -} - -/* - * ========================================================================== - * SPA state manipulation (open/create/destroy/import/export) - * ========================================================================== - */ - -static int -spa_error_entry_compare(const void *a, const void *b) -{ - const spa_error_entry_t *sa = (const spa_error_entry_t *)a; - const spa_error_entry_t *sb = (const spa_error_entry_t *)b; - int ret; - - ret = memcmp(&sa->se_bookmark, &sb->se_bookmark, - sizeof (zbookmark_phys_t)); - - return (AVL_ISIGN(ret)); -} - -/* - * Utility function which retrieves copies of the current logs and - * re-initializes them in the process. - */ -void -spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) -{ - ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); - - bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); - bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); - - avl_create(&spa->spa_errlist_scrub, - spa_error_entry_compare, sizeof (spa_error_entry_t), - offsetof(spa_error_entry_t, se_avl)); - avl_create(&spa->spa_errlist_last, - spa_error_entry_compare, sizeof (spa_error_entry_t), - offsetof(spa_error_entry_t, se_avl)); -} - -static void -spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q) -{ - const zio_taskq_info_t *ztip = &zio_taskqs[t][q]; - enum zti_modes mode = ztip->zti_mode; - uint_t value = ztip->zti_value; - uint_t count = ztip->zti_count; - spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; - char name[32]; - uint_t i, flags = 0; - boolean_t batch = B_FALSE; - - if (mode == ZTI_MODE_NULL) { - tqs->stqs_count = 0; - tqs->stqs_taskq = NULL; - return; - } - - ASSERT3U(count, >, 0); - - tqs->stqs_count = count; - tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP); - - switch (mode) { - case ZTI_MODE_FIXED: - ASSERT3U(value, >=, 1); - value = MAX(value, 1); - flags |= TASKQ_DYNAMIC; - break; - - case ZTI_MODE_BATCH: - batch = B_TRUE; - flags |= TASKQ_THREADS_CPU_PCT; - value = MIN(zio_taskq_batch_pct, 100); - break; - - default: - panic("unrecognized mode for %s_%s taskq (%u:%u) in " - "spa_activate()", - zio_type_name[t], zio_taskq_types[q], mode, value); - break; - } - - for (i = 0; i < count; i++) { - taskq_t *tq; - - if (count > 1) { - (void) snprintf(name, sizeof (name), "%s_%s_%u", - zio_type_name[t], zio_taskq_types[q], i); - } else { - (void) snprintf(name, sizeof (name), "%s_%s", - zio_type_name[t], zio_taskq_types[q]); - } - - if (zio_taskq_sysdc && spa->spa_proc != &p0) { - if (batch) - flags |= TASKQ_DC_BATCH; - - tq = taskq_create_sysdc(name, value, 50, INT_MAX, - spa->spa_proc, zio_taskq_basedc, flags); - } else { - pri_t pri = maxclsyspri; - /* - * The write issue taskq can be extremely CPU - * intensive. Run it at slightly less important - * priority than the other taskqs. Under Linux this - * means incrementing the priority value on platforms - * like illumos it should be decremented. - */ - if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE) - pri++; - - tq = taskq_create_proc(name, value, pri, 50, - INT_MAX, spa->spa_proc, flags); - } - - tqs->stqs_taskq[i] = tq; - } -} - -static void -spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q) -{ - spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; - uint_t i; - - if (tqs->stqs_taskq == NULL) { - ASSERT3U(tqs->stqs_count, ==, 0); - return; - } - - for (i = 0; i < tqs->stqs_count; i++) { - ASSERT3P(tqs->stqs_taskq[i], !=, NULL); - taskq_destroy(tqs->stqs_taskq[i]); - } - - kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *)); - tqs->stqs_taskq = NULL; -} - -/* - * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority. - * Note that a type may have multiple discrete taskqs to avoid lock contention - * on the taskq itself. In that case we choose which taskq at random by using - * the low bits of gethrtime(). - */ -void -spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, - task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent) -{ - spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; - taskq_t *tq; - - ASSERT3P(tqs->stqs_taskq, !=, NULL); - ASSERT3U(tqs->stqs_count, !=, 0); - - if (tqs->stqs_count == 1) { - tq = tqs->stqs_taskq[0]; - } else { - tq = tqs->stqs_taskq[((uint64_t)gethrtime()) % tqs->stqs_count]; - } - - taskq_dispatch_ent(tq, func, arg, flags, ent); -} - -/* - * Same as spa_taskq_dispatch_ent() but block on the task until completion. - */ -void -spa_taskq_dispatch_sync(spa_t *spa, zio_type_t t, zio_taskq_type_t q, - task_func_t *func, void *arg, uint_t flags) -{ - spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; - taskq_t *tq; - taskqid_t id; - - ASSERT3P(tqs->stqs_taskq, !=, NULL); - ASSERT3U(tqs->stqs_count, !=, 0); - - if (tqs->stqs_count == 1) { - tq = tqs->stqs_taskq[0]; - } else { - tq = tqs->stqs_taskq[((uint64_t)gethrtime()) % tqs->stqs_count]; - } - - id = taskq_dispatch(tq, func, arg, flags); - if (id) - taskq_wait_id(tq, id); -} - -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++) { - spa_taskqs_init(spa, t, q); - } - } -} - -#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, int mode) -{ - ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); - - spa->spa_state = POOL_STATE_ACTIVE; - spa->spa_mode = mode; - - spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); - spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); - - /* Try to create a covering process */ - mutex_enter(&spa->spa_proc_lock); - ASSERT(spa->spa_proc_state == SPA_PROC_NONE); - ASSERT(spa->spa_proc == &p0); - spa->spa_did = 0; - -#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)); - list_create(&spa->spa_evicting_os_list, sizeof (objset_t), - offsetof(objset_t, os_evicting_node)); - list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), - offsetof(vdev_t, vdev_state_dirty_node)); - - txg_list_create(&spa->spa_vdev_txg_list, spa, - offsetof(struct vdev, vdev_txg_node)); - - avl_create(&spa->spa_errlist_scrub, - spa_error_entry_compare, sizeof (spa_error_entry_t), - offsetof(spa_error_entry_t, se_avl)); - avl_create(&spa->spa_errlist_last, - spa_error_entry_compare, sizeof (spa_error_entry_t), - offsetof(spa_error_entry_t, se_avl)); - - /* - * This taskq is used to perform zvol-minor-related tasks - * asynchronously. This has several advantages, including easy - * resolution of various deadlocks (zfsonlinux bug #3681). - * - * The taskq must be single threaded to ensure tasks are always - * processed in the order in which they were dispatched. - * - * A taskq per pool allows one to keep the pools independent. - * This way if one pool is suspended, it will not impact another. - * - * The preferred location to dispatch a zvol minor task is a sync - * task. In this context, there is easy access to the spa_t and minimal - * error handling is required because the sync task must succeed. - */ - spa->spa_zvol_taskq = taskq_create("z_zvol", 1, defclsyspri, - 1, INT_MAX, 0); - - /* - * Taskq dedicated to prefetcher threads: this is used to prevent the - * pool traverse code from monopolizing the global (and limited) - * system_taskq by inappropriately scheduling long running tasks on it. - */ - spa->spa_prefetch_taskq = taskq_create("z_prefetch", boot_ncpus, - defclsyspri, 1, INT_MAX, TASKQ_DYNAMIC); - - /* - * The taskq to upgrade datasets in this pool. Currently used by - * feature SPA_FEATURE_USEROBJ_ACCOUNTING. - */ - spa->spa_upgrade_taskq = taskq_create("z_upgrade", boot_ncpus, - defclsyspri, 1, INT_MAX, TASKQ_DYNAMIC); -} - -/* - * Opposite of spa_activate(). - */ -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); - - spa_evicting_os_wait(spa); - - if (spa->spa_zvol_taskq) { - taskq_destroy(spa->spa_zvol_taskq); - spa->spa_zvol_taskq = NULL; - } - - if (spa->spa_prefetch_taskq) { - taskq_destroy(spa->spa_prefetch_taskq); - spa->spa_prefetch_taskq = NULL; - } - - if (spa->spa_upgrade_taskq) { - taskq_destroy(spa->spa_upgrade_taskq); - spa->spa_upgrade_taskq = NULL; - } - - txg_list_destroy(&spa->spa_vdev_txg_list); - - list_destroy(&spa->spa_config_dirty_list); - list_destroy(&spa->spa_evicting_os_list); - list_destroy(&spa->spa_state_dirty_list); - - taskq_cancel_id(system_delay_taskq, spa->spa_deadman_tqid); - - for (t = 0; t < ZIO_TYPES; t++) { - for (q = 0; q < ZIO_TASKQ_TYPES; q++) { - spa_taskqs_fini(spa, t, q); - } - } - - metaslab_class_destroy(spa->spa_normal_class); - spa->spa_normal_class = NULL; - - metaslab_class_destroy(spa->spa_log_class); - spa->spa_log_class = NULL; - - /* - * If this was part of an import or the open otherwise failed, we may - * still have errors left in the queues. Empty them just in case. - */ - spa_errlog_drain(spa); - - avl_destroy(&spa->spa_errlist_scrub); - avl_destroy(&spa->spa_errlist_last); - - spa->spa_state = POOL_STATE_UNINITIALIZED; - - mutex_enter(&spa->spa_proc_lock); - if (spa->spa_proc_state != SPA_PROC_NONE) { - ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); - spa->spa_proc_state = SPA_PROC_DEACTIVATE; - cv_broadcast(&spa->spa_proc_cv); - while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { - ASSERT(spa->spa_proc != &p0); - cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); - } - ASSERT(spa->spa_proc_state == SPA_PROC_GONE); - spa->spa_proc_state = SPA_PROC_NONE; - } - ASSERT(spa->spa_proc == &p0); - mutex_exit(&spa->spa_proc_lock); - - /* - * We want to make sure spa_thread() has actually exited the ZFS - * module, so that the module can't be unloaded out from underneath - * it. - */ - if (spa->spa_did != 0) { - thread_join(spa->spa_did); - spa->spa_did = 0; - } -} - -/* - * Verify a pool configuration, and construct the vdev tree appropriately. This - * will create all the necessary vdevs in the appropriate layout, with each vdev - * in the CLOSED state. This will prep the pool before open/creation/import. - * All vdev validation is done by the vdev_alloc() routine. - */ -static int -spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, - uint_t id, int atype) -{ - nvlist_t **child; - uint_t children; - int error; - int c; - - if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) - return (error); - - if ((*vdp)->vdev_ops->vdev_op_leaf) - return (0); - - error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, - &child, &children); - - if (error == ENOENT) - return (0); - - if (error) { - vdev_free(*vdp); - *vdp = NULL; - return (SET_ERROR(EINVAL)); - } - - for (c = 0; c < children; c++) { - vdev_t *vd; - if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, - atype)) != 0) { - vdev_free(*vdp); - *vdp = NULL; - return (error); - } - } - - ASSERT(*vdp != NULL); - - return (0); -} - -/* - * Opposite of spa_load(). - */ -static void -spa_unload(spa_t *spa) -{ - int i, c; - - ASSERT(MUTEX_HELD(&spa_namespace_lock)); - - /* - * Stop async tasks. - */ - spa_async_suspend(spa); - - /* - * Stop syncing. - */ - if (spa->spa_sync_on) { - txg_sync_stop(spa->spa_dsl_pool); - spa->spa_sync_on = B_FALSE; - } - - /* - * Even though vdev_free() also calls vdev_metaslab_fini, we need - * to call it earlier, before we wait for async i/o to complete. - * This ensures that there is no async metaslab prefetching, by - * calling taskq_wait(mg_taskq). - */ - if (spa->spa_root_vdev != NULL) { - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - for (c = 0; c < spa->spa_root_vdev->vdev_children; c++) - vdev_metaslab_fini(spa->spa_root_vdev->vdev_child[c]); - spa_config_exit(spa, SCL_ALL, FTAG); - } - - if (spa->spa_mmp.mmp_thread) - mmp_thread_stop(spa); - - /* - * Wait for any outstanding async I/O to complete. - */ - if (spa->spa_async_zio_root != NULL) { - for (i = 0; i < max_ncpus; i++) - (void) zio_wait(spa->spa_async_zio_root[i]); - kmem_free(spa->spa_async_zio_root, max_ncpus * sizeof (void *)); - spa->spa_async_zio_root = NULL; - } - - bpobj_close(&spa->spa_deferred_bpobj); - - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - - /* - * Close all vdevs. - */ - if (spa->spa_root_vdev) - vdev_free(spa->spa_root_vdev); - ASSERT(spa->spa_root_vdev == NULL); - - /* - * Close the dsl pool. - */ - if (spa->spa_dsl_pool) { - dsl_pool_close(spa->spa_dsl_pool); - spa->spa_dsl_pool = NULL; - spa->spa_meta_objset = NULL; - } - - ddt_unload(spa); - - /* - * Drop and purge level 2 cache - */ - spa_l2cache_drop(spa); - - for (i = 0; i < spa->spa_spares.sav_count; i++) - vdev_free(spa->spa_spares.sav_vdevs[i]); - if (spa->spa_spares.sav_vdevs) { - kmem_free(spa->spa_spares.sav_vdevs, - spa->spa_spares.sav_count * sizeof (void *)); - spa->spa_spares.sav_vdevs = NULL; - } - if (spa->spa_spares.sav_config) { - nvlist_free(spa->spa_spares.sav_config); - spa->spa_spares.sav_config = NULL; - } - spa->spa_spares.sav_count = 0; - - for (i = 0; i < spa->spa_l2cache.sav_count; i++) { - vdev_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 *)); - spa->spa_l2cache.sav_vdevs = NULL; - } - if (spa->spa_l2cache.sav_config) { - nvlist_free(spa->spa_l2cache.sav_config); - spa->spa_l2cache.sav_config = NULL; - } - spa->spa_l2cache.sav_count = 0; - - spa->spa_async_suspended = 0; - - if (spa->spa_comment != NULL) { - spa_strfree(spa->spa_comment); - spa->spa_comment = NULL; - } - - spa_config_exit(spa, SCL_ALL, FTAG); -} - -/* - * Load (or re-load) the current list of vdevs describing the active spares for - * this pool. When this is called, we have some form of basic information in - * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and - * then re-generate a more complete list including status information. - */ -static void -spa_load_spares(spa_t *spa) -{ - nvlist_t **spares; - uint_t nspares; - int i; - vdev_t *vd, *tvd; - - ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); - - /* - * First, close and free any existing spare vdevs. - */ - for (i = 0; i < spa->spa_spares.sav_count; i++) { - vd = spa->spa_spares.sav_vdevs[i]; - - /* Undo the call to spa_activate() below */ - if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, - B_FALSE)) != NULL && tvd->vdev_isspare) - spa_spare_remove(tvd); - vdev_close(vd); - vdev_free(vd); - } - - if (spa->spa_spares.sav_vdevs) - kmem_free(spa->spa_spares.sav_vdevs, - spa->spa_spares.sav_count * sizeof (void *)); - - if (spa->spa_spares.sav_config == NULL) - nspares = 0; - else - VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, - ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); - - spa->spa_spares.sav_count = (int)nspares; - spa->spa_spares.sav_vdevs = NULL; - - if (nspares == 0) - return; - - /* - * Construct the array of vdevs, opening them to get status in the - * process. For each spare, there is potentially two different vdev_t - * structures associated with it: one in the list of spares (used only - * for basic validation purposes) and one in the active vdev - * configuration (if it's spared in). During this phase we open and - * validate each vdev on the spare list. If the vdev also exists in the - * active configuration, then we also mark this vdev as an active spare. - */ - spa->spa_spares.sav_vdevs = kmem_zalloc(nspares * sizeof (void *), - KM_SLEEP); - for (i = 0; i < spa->spa_spares.sav_count; i++) { - VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, - VDEV_ALLOC_SPARE) == 0); - ASSERT(vd != NULL); - - spa->spa_spares.sav_vdevs[i] = vd; - - if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, - B_FALSE)) != NULL) { - if (!tvd->vdev_isspare) - spa_spare_add(tvd); - - /* - * We only mark the spare active if we were successfully - * able to load the vdev. Otherwise, importing a pool - * with a bad active spare would result in strange - * behavior, because multiple pool would think the spare - * is actively in use. - * - * There is a vulnerability here to an equally bizarre - * circumstance, where a dead active spare is later - * brought back to life (onlined or otherwise). Given - * the rarity of this scenario, and the extra complexity - * it adds, we ignore the possibility. - */ - if (!vdev_is_dead(tvd)) - spa_spare_activate(tvd); - } - - vd->vdev_top = vd; - vd->vdev_aux = &spa->spa_spares; - - if (vdev_open(vd) != 0) - continue; - - if (vdev_validate_aux(vd) == 0) - spa_spare_add(vd); - } - - /* - * Recompute the stashed list of spares, with status information - * this time. - */ - VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, - DATA_TYPE_NVLIST_ARRAY) == 0); - - spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), - KM_SLEEP); - for (i = 0; i < spa->spa_spares.sav_count; i++) - spares[i] = vdev_config_generate(spa, - spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); - VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, - ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); - for (i = 0; i < spa->spa_spares.sav_count; i++) - nvlist_free(spares[i]); - kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); -} - -/* - * Load (or re-load) the current list of vdevs describing the active l2cache for - * this pool. When this is called, we have some form of basic information in - * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and - * then re-generate a more complete list including status information. - * Devices which are already active have their details maintained, and are - * not re-opened. - */ -static void -spa_load_l2cache(spa_t *spa) -{ - nvlist_t **l2cache = NULL; - uint_t nl2cache; - int i, j, oldnvdevs; - uint64_t guid; - vdev_t *vd, **oldvdevs, **newvdevs; - spa_aux_vdev_t *sav = &spa->spa_l2cache; - - ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); - - oldvdevs = sav->sav_vdevs; - oldnvdevs = sav->sav_count; - sav->sav_vdevs = NULL; - sav->sav_count = 0; - - if (sav->sav_config == NULL) { - nl2cache = 0; - newvdevs = NULL; - goto out; - } - - VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, - ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); - newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); - - /* - * Process new nvlist of vdevs. - */ - for (i = 0; i < nl2cache; i++) { - VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, - &guid) == 0); - - newvdevs[i] = NULL; - for (j = 0; j < oldnvdevs; j++) { - vd = oldvdevs[j]; - if (vd != NULL && guid == vd->vdev_guid) { - /* - * Retain previous vdev for add/remove ops. - */ - newvdevs[i] = vd; - oldvdevs[j] = NULL; - break; - } - } - - if (newvdevs[i] == NULL) { - /* - * Create new vdev - */ - VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, - VDEV_ALLOC_L2CACHE) == 0); - ASSERT(vd != NULL); - newvdevs[i] = vd; - - /* - * Commit this vdev as an l2cache device, - * even if it fails to open. - */ - spa_l2cache_add(vd); - - vd->vdev_top = vd; - vd->vdev_aux = sav; - - spa_l2cache_activate(vd); - - if (vdev_open(vd) != 0) - continue; - - (void) vdev_validate_aux(vd); - - if (!vdev_is_dead(vd)) - l2arc_add_vdev(spa, vd); - } - } - - sav->sav_vdevs = newvdevs; - sav->sav_count = (int)nl2cache; - - /* - * Recompute the stashed list of l2cache devices, with status - * information this time. - */ - VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, - DATA_TYPE_NVLIST_ARRAY) == 0); - - if (sav->sav_count > 0) - l2cache = kmem_alloc(sav->sav_count * sizeof (void *), - KM_SLEEP); - for (i = 0; i < sav->sav_count; i++) - l2cache[i] = vdev_config_generate(spa, - sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); - VERIFY(nvlist_add_nvlist_array(sav->sav_config, - ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); - -out: - /* - * Purge vdevs that were dropped - */ - for (i = 0; i < oldnvdevs; i++) { - uint64_t pool; - - vd = oldvdevs[i]; - if (vd != NULL) { - ASSERT(vd->vdev_isl2cache); - - if (spa_l2cache_exists(vd->vdev_guid, &pool) && - pool != 0ULL && l2arc_vdev_present(vd)) - l2arc_remove_vdev(vd); - vdev_clear_stats(vd); - vdev_free(vd); - } - } - - if (oldvdevs) - kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); - - for (i = 0; i < sav->sav_count; i++) - nvlist_free(l2cache[i]); - if (sav->sav_count) - kmem_free(l2cache, sav->sav_count * sizeof (void *)); -} - -static int -load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) -{ - dmu_buf_t *db; - char *packed = NULL; - size_t nvsize = 0; - int error; - *value = NULL; - - 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 = vmem_alloc(nvsize, KM_SLEEP); - error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, - DMU_READ_PREFETCH); - if (error == 0) - error = nvlist_unpack(packed, nvsize, value, 0); - vmem_free(packed, nvsize); - - return (error); -} - -/* - * Checks to see if the given vdev could not be opened, in which case we post a - * sysevent to notify the autoreplace code that the device has been removed. - */ -static void -spa_check_removed(vdev_t *vd) -{ - int c; - - for (c = 0; c < vd->vdev_children; c++) - spa_check_removed(vd->vdev_child[c]); - - if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) && - !vd->vdev_ishole) { - zfs_post_autoreplace(vd->vdev_spa, vd); - spa_event_notify(vd->vdev_spa, vd, NULL, ESC_ZFS_VDEV_CHECK); - } -} - -static void -spa_config_valid_zaps(vdev_t *vd, vdev_t *mvd) -{ - uint64_t i; - - ASSERT3U(vd->vdev_children, ==, mvd->vdev_children); - - vd->vdev_top_zap = mvd->vdev_top_zap; - vd->vdev_leaf_zap = mvd->vdev_leaf_zap; - - for (i = 0; i < vd->vdev_children; i++) { - spa_config_valid_zaps(vd->vdev_child[i], mvd->vdev_child[i]); - } -} - -/* - * Validate the current config against the MOS config - */ -static boolean_t -spa_config_valid(spa_t *spa, nvlist_t *config) -{ - vdev_t *mrvd, *rvd = spa->spa_root_vdev; - nvlist_t *nv; - 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_SLEEP); - VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 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); - } - - /* - * Per-vdev ZAP info is stored exclusively in the MOS. - */ - spa_config_valid_zaps(tvd, mtvd); - } - } - - 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 boolean_t -spa_check_logs(spa_t *spa) -{ - boolean_t rv = B_FALSE; - dsl_pool_t *dp = spa_get_dsl(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: - rv = (dmu_objset_find_dp(dp, dp->dp_root_dir_obj, - zil_check_log_chain, NULL, DS_FIND_CHILDREN) != 0); - if (rv) - spa_set_log_state(spa, SPA_LOG_MISSING); - break; - } - return (rv); -} - -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; - - error = dmu_objset_find(spa_name(spa), zil_vdev_offline, - NULL, DS_FIND_CHILDREN); - if (error == 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; - spa_t *spa = zio->io_spa; - - abd_free(zio->io_abd); - if (error) { - if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && - type != DMU_OT_INTENT_LOG) - atomic_inc_64(&sle->sle_meta_count); - else - atomic_inc_64(&sle->sle_data_count); - } - - mutex_enter(&spa->spa_scrub_lock); - spa->spa_scrub_inflight--; - cv_broadcast(&spa->spa_scrub_io_cv); - mutex_exit(&spa->spa_scrub_lock); -} - -/* - * Maximum number of concurrent scrub i/os to create while verifying - * a pool while importing it. - */ -int spa_load_verify_maxinflight = 10000; -int spa_load_verify_metadata = B_TRUE; -int spa_load_verify_data = B_TRUE; - -/*ARGSUSED*/ -static int -spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, - const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) -{ - zio_t *rio; - size_t size; - - if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp)) - return (0); - /* - * Note: normally this routine will not be called if - * spa_load_verify_metadata is not set. However, it may be useful - * to manually set the flag after the traversal has begun. - */ - if (!spa_load_verify_metadata) - return (0); - if (!BP_IS_METADATA(bp) && !spa_load_verify_data) - return (0); - - rio = arg; - size = BP_GET_PSIZE(bp); - - mutex_enter(&spa->spa_scrub_lock); - while (spa->spa_scrub_inflight >= spa_load_verify_maxinflight) - cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); - spa->spa_scrub_inflight++; - mutex_exit(&spa->spa_scrub_lock); - - zio_nowait(zio_read(rio, spa, bp, abd_alloc_for_io(size, B_FALSE), size, - spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, - ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | - ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); - return (0); -} - -/* ARGSUSED */ -int -verify_dataset_name_len(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg) -{ - if (dsl_dataset_namelen(ds) >= ZFS_MAX_DATASET_NAME_LEN) - return (SET_ERROR(ENAMETOOLONG)); - - 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 = 0; - - zpool_get_rewind_policy(spa->spa_config, &policy); - - if (policy.zrp_request & ZPOOL_NEVER_REWIND) - return (0); - - dsl_pool_config_enter(spa->spa_dsl_pool, FTAG); - error = dmu_objset_find_dp(spa->spa_dsl_pool, - spa->spa_dsl_pool->dp_root_dir_obj, verify_dataset_name_len, NULL, - DS_FIND_CHILDREN); - dsl_pool_config_exit(spa->spa_dsl_pool, FTAG); - if (error != 0) - return (error); - - rio = zio_root(spa, NULL, &sle, - ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); - - if (spa_load_verify_metadata) { - error = traverse_pool(spa, spa->spa_verify_min_txg, - TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA, - 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 = SET_ERROR(EIO); - return (error); - } - - return (verify_ok ? 0 : EIO); -} - -/* - * Find a value in the pool props object. - */ -static void -spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) -{ - (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, - zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); -} - -/* - * Find a value in the pool directory object. - */ -static int -spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) -{ - return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, - name, sizeof (uint64_t), 1, val)); -} - -static int -spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) -{ - vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); - return (err); -} - -/* - * Fix up config after a partly-completed split. This is done with the - * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off - * pool have that entry in their config, but only the splitting one contains - * a list of all the guids of the vdevs that are being split off. - * - * This function determines what to do with that list: either rejoin - * all the disks to the pool, or complete the splitting process. To attempt - * the rejoin, each disk that is offlined is marked online again, and - * we do a reopen() call. If the vdev label for every disk that was - * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) - * then we call vdev_split() on each disk, and complete the split. - * - * Otherwise we leave the config alone, with all the vdevs in place in - * the original pool. - */ -static void -spa_try_repair(spa_t *spa, nvlist_t *config) -{ - uint_t extracted; - uint64_t *glist; - uint_t i, gcount; - nvlist_t *nvl; - vdev_t **vd; - boolean_t attempt_reopen; - - if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) - return; - - /* check that the config is complete */ - if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, - &glist, &gcount) != 0) - return; - - vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); - - /* attempt to online all the vdevs & validate */ - attempt_reopen = B_TRUE; - for (i = 0; i < gcount; i++) { - if (glist[i] == 0) /* vdev is hole */ - continue; - - vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); - if (vd[i] == NULL) { - /* - * Don't bother attempting to reopen the disks; - * just do the split. - */ - attempt_reopen = B_FALSE; - } else { - /* attempt to re-online it */ - vd[i]->vdev_offline = B_FALSE; - } - } - - if (attempt_reopen) { - vdev_reopen(spa->spa_root_vdev); - - /* check each device to see what state it's in */ - for (extracted = 0, i = 0; i < gcount; i++) { - if (vd[i] != NULL && - vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) - break; - ++extracted; - } - } - - /* - * If every disk has been moved to the new pool, or if we never - * even attempted to look at them, then we split them off for - * good. - */ - if (!attempt_reopen || gcount == extracted) { - for (i = 0; i < gcount; i++) - if (vd[i] != NULL) - vdev_split(vd[i]); - vdev_reopen(spa->spa_root_vdev); - } - - kmem_free(vd, gcount * sizeof (vdev_t *)); -} - -static int -spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type, - boolean_t mosconfig) -{ - nvlist_t *config = spa->spa_config; - char *ereport = FM_EREPORT_ZFS_POOL; - char *comment; - int error; - uint64_t pool_guid; - nvlist_t *nvl; - - if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) - return (SET_ERROR(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, - &spa->spa_ubsync.ub_version) != 0) - spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; - - (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, - &spa->spa_config_txg); - - if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && - spa_guid_exists(pool_guid, 0)) { - error = SET_ERROR(EEXIST); - } 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_SLEEP) == 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); - } - - /* - * Don't count references from objsets that are already closed - * and are making their way through the eviction process. - */ - spa_evicting_os_wait(spa); - 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); -} - -#ifdef ZFS_DEBUG -/* - * Count the number of per-vdev ZAPs associated with all of the vdevs in the - * vdev tree rooted in the given vd, and ensure that each ZAP is present in the - * spa's per-vdev ZAP list. - */ -static uint64_t -vdev_count_verify_zaps(vdev_t *vd) -{ - spa_t *spa = vd->vdev_spa; - uint64_t total = 0; - uint64_t i; - - if (vd->vdev_top_zap != 0) { - total++; - ASSERT0(zap_lookup_int(spa->spa_meta_objset, - spa->spa_all_vdev_zaps, vd->vdev_top_zap)); - } - if (vd->vdev_leaf_zap != 0) { - total++; - ASSERT0(zap_lookup_int(spa->spa_meta_objset, - spa->spa_all_vdev_zaps, vd->vdev_leaf_zap)); - } - - for (i = 0; i < vd->vdev_children; i++) { - total += vdev_count_verify_zaps(vd->vdev_child[i]); - } - - return (total); -} -#endif - -/* - * Determine whether the activity check is required. - */ -static boolean_t -spa_activity_check_required(spa_t *spa, uberblock_t *ub, nvlist_t *label, - nvlist_t *config) -{ - uint64_t state = 0; - uint64_t hostid = 0; - uint64_t tryconfig_txg = 0; - uint64_t tryconfig_timestamp = 0; - nvlist_t *nvinfo; - - if (nvlist_exists(config, ZPOOL_CONFIG_LOAD_INFO)) { - nvinfo = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO); - (void) nvlist_lookup_uint64(nvinfo, ZPOOL_CONFIG_MMP_TXG, - &tryconfig_txg); - (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_TIMESTAMP, - &tryconfig_timestamp); - } - - (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, &state); - - /* - * Disable the MMP activity check - This is used by zdb which - * is intended to be used on potentially active pools. - */ - if (spa->spa_import_flags & ZFS_IMPORT_SKIP_MMP) - return (B_FALSE); - - /* - * Skip the activity check when the MMP feature is disabled. - */ - if (ub->ub_mmp_magic == MMP_MAGIC && ub->ub_mmp_delay == 0) - return (B_FALSE); - /* - * If the tryconfig_* values are nonzero, they are the results of an - * earlier tryimport. If they match the uberblock we just found, then - * the pool has not changed and we return false so we do not test a - * second time. - */ - if (tryconfig_txg && tryconfig_txg == ub->ub_txg && - tryconfig_timestamp && tryconfig_timestamp == ub->ub_timestamp) - return (B_FALSE); - - /* - * Allow the activity check to be skipped when importing the pool - * on the same host which last imported it. Since the hostid from - * configuration may be stale use the one read from the label. - */ - if (nvlist_exists(label, ZPOOL_CONFIG_HOSTID)) - hostid = fnvlist_lookup_uint64(label, ZPOOL_CONFIG_HOSTID); - - if (hostid == spa_get_hostid()) - return (B_FALSE); - - /* - * Skip the activity test when the pool was cleanly exported. - */ - if (state != POOL_STATE_ACTIVE) - return (B_FALSE); - - return (B_TRUE); -} - -/* - * Perform the import activity check. If the user canceled the import or - * we detected activity then fail. - */ -static int -spa_activity_check(spa_t *spa, uberblock_t *ub, nvlist_t *config) -{ - uint64_t import_intervals = MAX(zfs_multihost_import_intervals, 1); - uint64_t txg = ub->ub_txg; - uint64_t timestamp = ub->ub_timestamp; - uint64_t import_delay = NANOSEC; - hrtime_t import_expire; - nvlist_t *mmp_label = NULL; - vdev_t *rvd = spa->spa_root_vdev; - kcondvar_t cv; - kmutex_t mtx; - int error = 0; - - cv_init(&cv, NULL, CV_DEFAULT, NULL); - mutex_init(&mtx, NULL, MUTEX_DEFAULT, NULL); - mutex_enter(&mtx); - - /* - * If ZPOOL_CONFIG_MMP_TXG is present an activity check was performed - * during the earlier tryimport. If the txg recorded there is 0 then - * the pool is known to be active on another host. - * - * Otherwise, the pool might be in use on another node. Check for - * changes in the uberblocks on disk if necessary. - */ - if (nvlist_exists(config, ZPOOL_CONFIG_LOAD_INFO)) { - nvlist_t *nvinfo = fnvlist_lookup_nvlist(config, - ZPOOL_CONFIG_LOAD_INFO); - - if (nvlist_exists(nvinfo, ZPOOL_CONFIG_MMP_TXG) && - fnvlist_lookup_uint64(nvinfo, ZPOOL_CONFIG_MMP_TXG) == 0) { - vdev_uberblock_load(rvd, ub, &mmp_label); - error = SET_ERROR(EREMOTEIO); - goto out; - } - } - - /* - * Preferentially use the zfs_multihost_interval from the node which - * last imported the pool. This value is stored in an MMP uberblock as. - * - * ub_mmp_delay * vdev_count_leaves() == zfs_multihost_interval - */ - if (ub->ub_mmp_magic == MMP_MAGIC && ub->ub_mmp_delay) - import_delay = MAX(import_delay, import_intervals * - ub->ub_mmp_delay * MAX(vdev_count_leaves(spa), 1)); - - /* Apply a floor using the local default values. */ - import_delay = MAX(import_delay, import_intervals * - MSEC2NSEC(MAX(zfs_multihost_interval, MMP_MIN_INTERVAL))); - - /* Add a small random factor in case of simultaneous imports (0-25%) */ - import_expire = gethrtime() + import_delay + - (import_delay * spa_get_random(250) / 1000); - - while (gethrtime() < import_expire) { - vdev_uberblock_load(rvd, ub, &mmp_label); - - if (txg != ub->ub_txg || timestamp != ub->ub_timestamp) { - error = SET_ERROR(EREMOTEIO); - break; - } - - if (mmp_label) { - nvlist_free(mmp_label); - mmp_label = NULL; - } - - error = cv_timedwait_sig(&cv, &mtx, ddi_get_lbolt() + hz); - if (error != -1) { - error = SET_ERROR(EINTR); - break; - } - error = 0; - } - -out: - mutex_exit(&mtx); - mutex_destroy(&mtx); - cv_destroy(&cv); - - /* - * If the pool is determined to be active store the status in the - * spa->spa_load_info nvlist. If the remote hostname or hostid are - * available from configuration read from disk store them as well. - * This allows 'zpool import' to generate a more useful message. - * - * ZPOOL_CONFIG_MMP_STATE - observed pool status (mandatory) - * ZPOOL_CONFIG_MMP_HOSTNAME - hostname from the active pool - * ZPOOL_CONFIG_MMP_HOSTID - hostid from the active pool - */ - if (error == EREMOTEIO) { - char *hostname = ""; - uint64_t hostid = 0; - - if (mmp_label) { - if (nvlist_exists(mmp_label, ZPOOL_CONFIG_HOSTNAME)) { - hostname = fnvlist_lookup_string(mmp_label, - ZPOOL_CONFIG_HOSTNAME); - fnvlist_add_string(spa->spa_load_info, - ZPOOL_CONFIG_MMP_HOSTNAME, hostname); - } - - if (nvlist_exists(mmp_label, ZPOOL_CONFIG_HOSTID)) { - hostid = fnvlist_lookup_uint64(mmp_label, - ZPOOL_CONFIG_HOSTID); - fnvlist_add_uint64(spa->spa_load_info, - ZPOOL_CONFIG_MMP_HOSTID, hostid); - } - } - - fnvlist_add_uint64(spa->spa_load_info, - ZPOOL_CONFIG_MMP_STATE, MMP_STATE_ACTIVE); - fnvlist_add_uint64(spa->spa_load_info, - ZPOOL_CONFIG_MMP_TXG, 0); - - error = spa_vdev_err(rvd, VDEV_AUX_ACTIVE, EREMOTEIO); - } - - if (mmp_label) - nvlist_free(mmp_label); - - return (error); -} - -/* - * 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, i; - uint64_t obj; - boolean_t missing_feat_write = B_FALSE; - boolean_t activity_check = B_FALSE; - nvlist_t *mos_config; - - /* - * 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 (SET_ERROR(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 = kmem_alloc(max_ncpus * sizeof (void *), - KM_SLEEP); - for (i = 0; i < max_ncpus; i++) { - spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL, - ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | - ZIO_FLAG_GODFATHER); - } - - /* - * Parse the configuration into a vdev tree. We explicitly set the - * value that will be returned by spa_version() since parsing the - * configuration requires knowing the version number. - */ - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); - spa_config_exit(spa, SCL_ALL, FTAG); - - if (error != 0) - return (error); - - ASSERT(spa->spa_root_vdev == rvd); - ASSERT3U(spa->spa_min_ashift, >=, SPA_MINBLOCKSHIFT); - ASSERT3U(spa->spa_max_ashift, <=, SPA_MAXBLOCKSHIFT); - - if (type != SPA_IMPORT_ASSEMBLE) { - ASSERT(spa_guid(spa) == pool_guid); - } - - /* - * Try to open all vdevs, loading each label in the process. - */ - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - error = vdev_open(rvd); - spa_config_exit(spa, SCL_ALL, FTAG); - if (error != 0) - return (error); - - /* - * We need to validate the vdev labels against the configuration that - * we have in hand, which is dependent on the setting of mosconfig. If - * mosconfig is true then we're validating the vdev labels based on - * that config. Otherwise, we're validating against the cached config - * (zpool.cache) that was read when we loaded the zfs module, and then - * later we will recursively call spa_load() and validate against - * the vdev config. - * - * If we're assembling a new pool that's been split off from an - * existing pool, the labels haven't yet been updated so we skip - * validation for now. - */ - if (type != SPA_IMPORT_ASSEMBLE) { - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - error = vdev_validate(rvd, mosconfig); - spa_config_exit(spa, SCL_ALL, FTAG); - - if (error != 0) - return (error); - - if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) - return (SET_ERROR(ENXIO)); - } - - /* - * Find the best uberblock. - */ - vdev_uberblock_load(rvd, ub, &label); - - /* - * If we weren't able to find a single valid uberblock, return failure. - */ - if (ub->ub_txg == 0) { - nvlist_free(label); - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); - } - - /* - * For pools which have the multihost property on determine if the - * pool is truly inactive and can be safely imported. Prevent - * hosts which don't have a hostid set from importing the pool. - */ - activity_check = spa_activity_check_required(spa, ub, label, config); - if (activity_check) { - if (ub->ub_mmp_magic == MMP_MAGIC && ub->ub_mmp_delay && - spa_get_hostid() == 0) { - nvlist_free(label); - fnvlist_add_uint64(spa->spa_load_info, - ZPOOL_CONFIG_MMP_STATE, MMP_STATE_NO_HOSTID); - return (spa_vdev_err(rvd, VDEV_AUX_ACTIVE, EREMOTEIO)); - } - - error = spa_activity_check(spa, ub, config); - if (error) { - nvlist_free(label); - return (error); - } - - fnvlist_add_uint64(spa->spa_load_info, - ZPOOL_CONFIG_MMP_STATE, MMP_STATE_INACTIVE); - fnvlist_add_uint64(spa->spa_load_info, - ZPOOL_CONFIG_MMP_TXG, ub->ub_txg); - } - - /* - * If the pool has an unsupported version we can't open it. - */ - 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. We first check to see if the pool - * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN). - * If it is, defer the vdev_guid_sum check till later so we - * can handle missing vdevs. - */ - if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, - &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE && - rvd->vdev_guid_sum != ub->ub_guid_sum) - return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); - - if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - spa_try_repair(spa, config); - spa_config_exit(spa, SCL_ALL, FTAG); - nvlist_free(spa->spa_config_splitting); - spa->spa_config_splitting = NULL; - } - - /* - * Initialize internal SPA structures. - */ - spa->spa_state = POOL_STATE_ACTIVE; - spa->spa_ubsync = spa->spa_uberblock; - spa->spa_verify_min_txg = spa->spa_extreme_rewind ? - TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; - spa->spa_first_txg = spa->spa_last_ubsync_txg ? - spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; - spa->spa_claim_max_txg = spa->spa_first_txg; - spa->spa_prev_software_version = ub->ub_software_version; - - error = dsl_pool_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 (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; - spa_feature_t i; - - 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 (!spa_features_check(spa, B_FALSE, - unsup_feat, enabled_feat)) - missing_feat_read = B_TRUE; - - if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) { - if (!spa_features_check(spa, B_TRUE, - 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)); - } - - /* - * Load refcounts for ZFS features from disk into an in-memory - * cache during SPA initialization. - */ - for (i = 0; i < SPA_FEATURES; i++) { - uint64_t refcount; - - error = feature_get_refcount_from_disk(spa, - &spa_feature_table[i], &refcount); - if (error == 0) { - spa->spa_feat_refcount_cache[i] = refcount; - } else if (error == ENOTSUP) { - spa->spa_feat_refcount_cache[i] = - SPA_FEATURE_DISABLED; - } else { - return (spa_vdev_err(rvd, - VDEV_AUX_CORRUPT_DATA, EIO)); - } - } - } - - if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) { - if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG, - &spa->spa_feat_enabled_txg_obj) != 0) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - } - - 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) { - uint64_t hostid; - nvlist_t *policy = NULL, *nvconfig; - - if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, - ZPOOL_CONFIG_HOSTID, &hostid) == 0) { - char *hostname; - unsigned long myhostid = 0; - - VERIFY(nvlist_lookup_string(nvconfig, - ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); - - myhostid = spa_get_hostid(); - if (hostid && myhostid && hostid != myhostid) { - nvlist_free(nvconfig); - return (SET_ERROR(EBADF)); - } - } - if (nvlist_lookup_nvlist(spa->spa_config, - ZPOOL_REWIND_POLICY, &policy) == 0) - VERIFY(nvlist_add_nvlist(nvconfig, - ZPOOL_REWIND_POLICY, policy) == 0); - - spa_config_set(spa, nvconfig); - spa_unload(spa); - spa_deactivate(spa); - spa_activate(spa, orig_mode); - - return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); - } - - /* Grab the checksum salt from the MOS. */ - error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, - DMU_POOL_CHECKSUM_SALT, 1, - sizeof (spa->spa_cksum_salt.zcs_bytes), - spa->spa_cksum_salt.zcs_bytes); - if (error == ENOENT) { - /* Generate a new salt for subsequent use */ - (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes, - sizeof (spa->spa_cksum_salt.zcs_bytes)); - } else if (error != 0) { - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - } - - if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); - if (error != 0) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - /* - * Load the bit that tells us to use the new accounting function - * (raid-z deflation). If we have an older pool, this will not - * be present. - */ - error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate); - if (error != 0 && error != ENOENT) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, - &spa->spa_creation_version); - if (error != 0 && error != ENOENT) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - /* - * Load the persistent error log. If we have an older pool, this will - * not be present. - */ - error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last); - if (error != 0 && error != ENOENT) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, - &spa->spa_errlog_scrub); - if (error != 0 && error != ENOENT) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - /* - * Load the history object. If we have an older pool, this - * will not be present. - */ - error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history); - if (error != 0 && error != ENOENT) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - /* - * Load the per-vdev ZAP map. If we have an older pool, this will not - * be present; in this case, defer its creation to a later time to - * avoid dirtying the MOS this early / out of sync context. See - * spa_sync_config_object. - */ - - /* The sentinel is only available in the MOS config. */ - if (load_nvlist(spa, spa->spa_config_object, &mos_config) != 0) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - error = spa_dir_prop(spa, DMU_POOL_VDEV_ZAP_MAP, - &spa->spa_all_vdev_zaps); - - if (error == ENOENT) { - VERIFY(!nvlist_exists(mos_config, - ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)); - spa->spa_avz_action = AVZ_ACTION_INITIALIZE; - ASSERT0(vdev_count_verify_zaps(spa->spa_root_vdev)); - } else if (error != 0) { - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - } else if (!nvlist_exists(mos_config, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)) { - /* - * An older version of ZFS overwrote the sentinel value, so - * we have orphaned per-vdev ZAPs in the MOS. Defer their - * destruction to later; see spa_sync_config_object. - */ - spa->spa_avz_action = AVZ_ACTION_DESTROY; - /* - * We're assuming that no vdevs have had their ZAPs created - * before this. Better be sure of it. - */ - ASSERT0(vdev_count_verify_zaps(spa->spa_root_vdev)); - } - nvlist_free(mos_config); - - /* - * If we're assembling the pool from the split-off vdevs of - * an existing pool, we don't want to attach the spares & cache - * devices. - */ - - /* - * Load any hot spares for this pool. - */ - error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object); - if (error != 0 && error != ENOENT) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { - ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); - if (load_nvlist(spa, spa->spa_spares.sav_object, - &spa->spa_spares.sav_config) != 0) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - spa_load_spares(spa); - spa_config_exit(spa, SCL_ALL, FTAG); - } else if (error == 0) { - spa->spa_spares.sav_sync = B_TRUE; - } - - /* - * Load any level 2 ARC devices for this pool. - */ - error = spa_dir_prop(spa, DMU_POOL_L2CACHE, - &spa->spa_l2cache.sav_object); - if (error != 0 && error != ENOENT) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { - ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); - if (load_nvlist(spa, spa->spa_l2cache.sav_object, - &spa->spa_l2cache.sav_config) != 0) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - spa_load_l2cache(spa); - spa_config_exit(spa, SCL_ALL, FTAG); - } else if (error == 0) { - spa->spa_l2cache.sav_sync = B_TRUE; - } - - spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); - - error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object); - if (error && error != ENOENT) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - if (error == 0) { - uint64_t autoreplace = 0; - - 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_MULTIHOST, &spa->spa_multihost); - spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, - &spa->spa_dedup_ditto); - - spa->spa_autoreplace = (autoreplace != 0); - } - - /* - * If the 'multihost' property is set, then never allow a pool to - * be imported when the system hostid is zero. The exception to - * this rule is zdb which is always allowed to access pools. - */ - if (spa_multihost(spa) && spa_get_hostid() == 0 && - (spa->spa_import_flags & ZFS_IMPORT_SKIP_MMP) == 0) { - fnvlist_add_uint64(spa->spa_load_info, - ZPOOL_CONFIG_MMP_STATE, MMP_STATE_NO_HOSTID); - return (spa_vdev_err(rvd, VDEV_AUX_ACTIVE, EREMOTEIO)); - } - - /* - * If the 'autoreplace' property is set, then post a resource notifying - * the ZFS DE that it should not issue any faults for unopenable - * devices. We also iterate over the vdevs, and post a sysevent for any - * unopenable vdevs so that the normal autoreplace handler can take - * over. - */ - if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) { - spa_check_removed(spa->spa_root_vdev); - /* - * For the import case, this is done in spa_import(), because - * at this point we're using the spare definitions from - * the MOS config, not necessarily from the userland config. - */ - if (state != SPA_LOAD_IMPORT) { - spa_aux_check_removed(&spa->spa_spares); - spa_aux_check_removed(&spa->spa_l2cache); - } - } - - /* - * Load the vdev state for all toplevel vdevs. - */ - vdev_load(rvd); - - /* - * Propagate the leaf DTLs we just loaded all the way up the tree. - */ - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - vdev_dtl_reassess(rvd, 0, 0, B_FALSE); - spa_config_exit(spa, SCL_ALL, FTAG); - - /* - * Load the DDTs (dedup tables). - */ - error = ddt_load(spa); - if (error != 0) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - spa_update_dspace(spa); - - /* - * Validate the config, using the MOS config to fill in any - * information which might be missing. If we fail to validate - * the config then declare the pool unfit for use. If we're - * assembling a pool from a split, the log is not transferred - * over. - */ - if (type != SPA_IMPORT_ASSEMBLE) { - nvlist_t *nvconfig; - - if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) - return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); - - if (!spa_config_valid(spa, nvconfig)) { - nvlist_free(nvconfig); - return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, - ENXIO)); - } - nvlist_free(nvconfig); - - /* - * Now that we've 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 (SET_ERROR(ENXIO)); - - if (spa_writeable(spa) && 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_writeable(spa) && (state == SPA_LOAD_RECOVER || - spa->spa_load_max_txg == UINT64_MAX)) { - dmu_tx_t *tx; - int need_update = B_FALSE; - dsl_pool_t *dp = spa_get_dsl(spa); - 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(dp, spa_first_txg(spa)); - (void) dmu_objset_find_dp(dp, dp->dp_root_dir_obj, - 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); - mmp_thread_start(spa); - - /* - * Wait for all claims to sync. We sync up to the highest - * claimed log block birth time so that claimed log blocks - * don't appear to be from the future. spa_claim_max_txg - * will have been set for us by either zil_check_log_chain() - * (invoked from spa_check_logs()) or zil_claim() above. - */ - txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); - - /* - * If the config cache is stale, or we have uninitialized - * metaslabs (see spa_vdev_add()), then update the config. - * - * If this is a verbatim import, trust the current - * in-core spa_config and update the disk labels. - */ - if (config_cache_txg != spa->spa_config_txg || - state == SPA_LOAD_IMPORT || - state == SPA_LOAD_RECOVER || - (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) - need_update = B_TRUE; - - for (c = 0; c < rvd->vdev_children; c++) - if (rvd->vdev_child[c]->vdev_ms_array == 0) - need_update = B_TRUE; - - /* - * Update the config cache asychronously in case we're the - * root pool, in which case the config cache isn't writable yet. - */ - if (need_update) - spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); - - /* - * Check all DTLs to see if anything needs resilvering. - */ - if (!dsl_scan_resilvering(spa->spa_dsl_pool) && - vdev_resilver_needed(rvd, NULL, NULL)) - spa_async_request(spa, SPA_ASYNC_RESILVER); - - /* - * Log the fact that we booted up (so that we can detect if - * we rebooted in the middle of an operation). - */ - spa_history_log_version(spa, "open", NULL); - - /* - * Delete any inconsistent datasets. - */ - (void) dmu_objset_find(spa_name(spa), - dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); - - /* - * Clean up any stale temporary dataset userrefs. - */ - dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); - } - - return (0); -} - -static int -spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig) -{ - int mode = spa->spa_mode; - - spa_unload(spa); - spa_deactivate(spa); - - spa->spa_load_max_txg = spa->spa_uberblock.ub_txg - 1; - - 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; - if (max_request != UINT64_MAX) - spa->spa_extreme_rewind = B_TRUE; - } - - 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); - else - nvlist_free(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); - } -} - -/* - * Pool Open/Import - * - * The import case is identical to an open except that the configuration is sent - * down from userland, instead of grabbed from the configuration cache. For the - * case of an open, the pool configuration will exist in the - * POOL_STATE_UNINITIALIZED state. - * - * The stats information (gen/count/ustats) is used to gather vdev statistics at - * the same time open the pool, without having to keep around the spa_t in some - * ambiguous state. - */ -static int -spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, - nvlist_t **config) -{ - spa_t *spa; - spa_load_state_t state = SPA_LOAD_OPEN; - int error; - int locked = B_FALSE; - int firstopen = B_FALSE; - - *spapp = NULL; - - /* - * As disgusting as this is, we need to support recursive calls to this - * function because dsl_dir_open() is called during spa_load(), and ends - * up calling spa_open() again. The real fix is to figure out how to - * avoid dsl_dir_open() calling this in the first place. - */ - if (mutex_owner(&spa_namespace_lock) != curthread) { - mutex_enter(&spa_namespace_lock); - locked = B_TRUE; - } - - if ((spa = spa_lookup(pool)) == NULL) { - if (locked) - mutex_exit(&spa_namespace_lock); - return (SET_ERROR(ENOENT)); - } - - if (spa->spa_state == POOL_STATE_UNINITIALIZED) { - zpool_rewind_policy_t policy; - - firstopen = B_TRUE; - - zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config, - &policy); - if (policy.zrp_request & ZPOOL_DO_REWIND) - state = SPA_LOAD_RECOVER; - - spa_activate(spa, spa_mode_global); - - if (state != SPA_LOAD_RECOVER) - spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; - - error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg, - policy.zrp_request); - - if (error == EBADF) { - /* - * If vdev_validate() returns failure (indicated by - * EBADF), it indicates that one of the vdevs indicates - * that the pool has been exported or destroyed. If - * this is the case, the config cache is out of sync and - * we should remove the pool from the namespace. - */ - spa_unload(spa); - spa_deactivate(spa); - spa_config_sync(spa, B_TRUE, B_TRUE); - spa_remove(spa); - if (locked) - mutex_exit(&spa_namespace_lock); - return (SET_ERROR(ENOENT)); - } - - if (error) { - /* - * We can't open the pool, but we still have useful - * information: the state of each vdev after the - * attempted vdev_open(). Return this to the user. - */ - if (config != NULL && spa->spa_config) { - VERIFY(nvlist_dup(spa->spa_config, config, - KM_SLEEP) == 0); - VERIFY(nvlist_add_nvlist(*config, - ZPOOL_CONFIG_LOAD_INFO, - spa->spa_load_info) == 0); - } - spa_unload(spa); - spa_deactivate(spa); - spa->spa_last_open_failed = error; - if (locked) - mutex_exit(&spa_namespace_lock); - *spapp = NULL; - return (error); - } - } - - spa_open_ref(spa, tag); - - if (config != NULL) - *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); - - /* - * If we've recovered the pool, pass back any information we - * gathered while doing the load. - */ - if (state == SPA_LOAD_RECOVER) { - VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, - spa->spa_load_info) == 0); - } - - if (locked) { - spa->spa_last_open_failed = 0; - spa->spa_last_ubsync_txg = 0; - spa->spa_load_txg = 0; - mutex_exit(&spa_namespace_lock); - } - - if (firstopen) - zvol_create_minors(spa, spa_name(spa), B_TRUE); - - *spapp = spa; - - return (0); -} - -int -spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, - nvlist_t **config) -{ - return (spa_open_common(name, spapp, tag, policy, config)); -} - -int -spa_open(const char *name, spa_t **spapp, void *tag) -{ - return (spa_open_common(name, spapp, tag, NULL, NULL)); -} - -/* - * Lookup the given spa_t, incrementing the inject count in the process, - * preventing it from being exported or destroyed. - */ -spa_t * -spa_inject_addref(char *name) -{ - spa_t *spa; - - mutex_enter(&spa_namespace_lock); - if ((spa = spa_lookup(name)) == NULL) { - mutex_exit(&spa_namespace_lock); - return (NULL); - } - spa->spa_inject_ref++; - mutex_exit(&spa_namespace_lock); - - return (spa); -} - -void -spa_inject_delref(spa_t *spa) -{ - mutex_enter(&spa_namespace_lock); - spa->spa_inject_ref--; - mutex_exit(&spa_namespace_lock); -} - -/* - * Add spares device information to the nvlist. - */ -static void -spa_add_spares(spa_t *spa, nvlist_t *config) -{ - nvlist_t **spares; - uint_t i, nspares; - nvlist_t *nvroot; - uint64_t guid; - vdev_stat_t *vs; - uint_t vsc; - uint64_t pool; - - ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); - - if (spa->spa_spares.sav_count == 0) - return; - - VERIFY(nvlist_lookup_nvlist(config, - ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); - VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, - ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); - if (nspares != 0) { - VERIFY(nvlist_add_nvlist_array(nvroot, - ZPOOL_CONFIG_SPARES, spares, nspares) == 0); - VERIFY(nvlist_lookup_nvlist_array(nvroot, - ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); - - /* - * Go through and find any spares which have since been - * repurposed as an active spare. If this is the case, update - * their status appropriately. - */ - for (i = 0; i < nspares; i++) { - VERIFY(nvlist_lookup_uint64(spares[i], - ZPOOL_CONFIG_GUID, &guid) == 0); - if (spa_spare_exists(guid, &pool, NULL) && - pool != 0ULL) { - VERIFY(nvlist_lookup_uint64_array( - spares[i], ZPOOL_CONFIG_VDEV_STATS, - (uint64_t **)&vs, &vsc) == 0); - vs->vs_state = VDEV_STATE_CANT_OPEN; - vs->vs_aux = VDEV_AUX_SPARED; - } - } - } -} - -/* - * Add l2cache device information to the nvlist, including vdev stats. - */ -static void -spa_add_l2cache(spa_t *spa, nvlist_t *config) -{ - nvlist_t **l2cache; - uint_t i, j, nl2cache; - nvlist_t *nvroot; - uint64_t guid; - vdev_t *vd; - vdev_stat_t *vs; - uint_t vsc; - - ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); - - if (spa->spa_l2cache.sav_count == 0) - return; - - VERIFY(nvlist_lookup_nvlist(config, - ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); - VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, - ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); - if (nl2cache != 0) { - VERIFY(nvlist_add_nvlist_array(nvroot, - ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); - VERIFY(nvlist_lookup_nvlist_array(nvroot, - ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); - - /* - * Update level 2 cache device stats. - */ - - for (i = 0; i < nl2cache; i++) { - VERIFY(nvlist_lookup_uint64(l2cache[i], - ZPOOL_CONFIG_GUID, &guid) == 0); - - vd = NULL; - for (j = 0; j < spa->spa_l2cache.sav_count; j++) { - if (guid == - spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { - vd = spa->spa_l2cache.sav_vdevs[j]; - break; - } - } - ASSERT(vd != NULL); - - VERIFY(nvlist_lookup_uint64_array(l2cache[i], - ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) - == 0); - vdev_get_stats(vd, vs); - vdev_config_generate_stats(vd, l2cache[i]); - - } - } -} - -static void -spa_feature_stats_from_disk(spa_t *spa, nvlist_t *features) -{ - zap_cursor_t zc; - zap_attribute_t za; - - 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); - VERIFY0(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); - VERIFY0(nvlist_add_uint64(features, za.za_name, - za.za_first_integer)); - } - zap_cursor_fini(&zc); - } -} - -static void -spa_feature_stats_from_cache(spa_t *spa, nvlist_t *features) -{ - int i; - - for (i = 0; i < SPA_FEATURES; i++) { - zfeature_info_t feature = spa_feature_table[i]; - uint64_t refcount; - - if (feature_get_refcount(spa, &feature, &refcount) != 0) - continue; - - VERIFY0(nvlist_add_uint64(features, feature.fi_guid, refcount)); - } -} - -/* - * Store a list of pool features and their reference counts in the - * config. - * - * The first time this is called on a spa, allocate a new nvlist, fetch - * the pool features and reference counts from disk, then save the list - * in the spa. In subsequent calls on the same spa use the saved nvlist - * and refresh its values from the cached reference counts. This - * ensures we don't block here on I/O on a suspended pool so 'zpool - * clear' can resume the pool. - */ -static void -spa_add_feature_stats(spa_t *spa, nvlist_t *config) -{ - nvlist_t *features; - - ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); - - mutex_enter(&spa->spa_feat_stats_lock); - features = spa->spa_feat_stats; - - if (features != NULL) { - spa_feature_stats_from_cache(spa, features); - } else { - VERIFY0(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP)); - spa->spa_feat_stats = features; - spa_feature_stats_from_disk(spa, features); - } - - VERIFY0(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, - features)); - - mutex_exit(&spa->spa_feat_stats_lock); -} - -int -spa_get_stats(const char *name, nvlist_t **config, - char *altroot, size_t buflen) -{ - int error; - spa_t *spa; - - *config = NULL; - error = spa_open_common(name, &spa, FTAG, NULL, config); - - if (spa != NULL) { - /* - * This still leaves a window of inconsistency where the spares - * or l2cache devices could change and the config would be - * self-inconsistent. - */ - spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); - - if (*config != NULL) { - uint64_t loadtimes[2]; - - loadtimes[0] = spa->spa_loaded_ts.tv_sec; - loadtimes[1] = spa->spa_loaded_ts.tv_nsec; - VERIFY(nvlist_add_uint64_array(*config, - ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); - - VERIFY(nvlist_add_uint64(*config, - ZPOOL_CONFIG_ERRCOUNT, - spa_get_errlog_size(spa)) == 0); - - if (spa_suspended(spa)) - VERIFY(nvlist_add_uint64(*config, - ZPOOL_CONFIG_SUSPENDED, - spa->spa_failmode) == 0); - - spa_add_spares(spa, *config); - spa_add_l2cache(spa, *config); - spa_add_feature_stats(spa, *config); - } - } - - /* - * We want to get the alternate root even for faulted pools, so we cheat - * and call spa_lookup() directly. - */ - if (altroot) { - if (spa == NULL) { - mutex_enter(&spa_namespace_lock); - spa = spa_lookup(name); - if (spa) - spa_altroot(spa, altroot, buflen); - else - altroot[0] = '\0'; - spa = NULL; - mutex_exit(&spa_namespace_lock); - } else { - spa_altroot(spa, altroot, buflen); - } - } - - if (spa != NULL) { - spa_config_exit(spa, SCL_CONFIG, FTAG); - spa_close(spa, FTAG); - } - - return (error); -} - -/* - * Validate that the auxiliary device array is well formed. We must have an - * array of nvlists, each which describes a valid leaf vdev. If this is an - * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be - * specified, as long as they are well-formed. - */ -static int -spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, - spa_aux_vdev_t *sav, const char *config, uint64_t version, - vdev_labeltype_t label) -{ - nvlist_t **dev; - uint_t i, ndev; - vdev_t *vd; - int error; - - ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); - - /* - * It's acceptable to have no devs specified. - */ - if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) - return (0); - - if (ndev == 0) - return (SET_ERROR(EINVAL)); - - /* - * Make sure the pool is formatted with a version that supports this - * device type. - */ - if (spa_version(spa) < version) - return (SET_ERROR(ENOTSUP)); - - /* - * Set the pending device list so we correctly handle device in-use - * checking. - */ - sav->sav_pending = dev; - sav->sav_npending = ndev; - - for (i = 0; i < ndev; i++) { - if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, - mode)) != 0) - goto out; - - if (!vd->vdev_ops->vdev_op_leaf) { - vdev_free(vd); - error = SET_ERROR(EINVAL); - goto out; - } - - vd->vdev_top = vd; - - if ((error = vdev_open(vd)) == 0 && - (error = vdev_label_init(vd, crtxg, label)) == 0) { - VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, - vd->vdev_guid) == 0); - } - - vdev_free(vd); - - if (error && - (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) - goto out; - else - error = 0; - } - -out: - sav->sav_pending = NULL; - sav->sav_npending = 0; - return (error); -} - -static int -spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) -{ - int error; - - ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); - - if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, - &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, - VDEV_LABEL_SPARE)) != 0) { - return (error); - } - - return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, - &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, - VDEV_LABEL_L2CACHE)); -} - -static void -spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, - const char *config) -{ - int i; - - if (sav->sav_config != NULL) { - nvlist_t **olddevs; - uint_t oldndevs; - nvlist_t **newdevs; - - /* - * Generate new dev list by concatenating with the - * current dev list. - */ - VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, - &olddevs, &oldndevs) == 0); - - newdevs = kmem_alloc(sizeof (void *) * - (ndevs + oldndevs), KM_SLEEP); - for (i = 0; i < oldndevs; i++) - VERIFY(nvlist_dup(olddevs[i], &newdevs[i], - KM_SLEEP) == 0); - for (i = 0; i < ndevs; i++) - VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], - KM_SLEEP) == 0); - - VERIFY(nvlist_remove(sav->sav_config, config, - DATA_TYPE_NVLIST_ARRAY) == 0); - - VERIFY(nvlist_add_nvlist_array(sav->sav_config, - config, newdevs, ndevs + oldndevs) == 0); - for (i = 0; i < oldndevs + ndevs; i++) - nvlist_free(newdevs[i]); - kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); - } else { - /* - * Generate a new dev list. - */ - VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, - KM_SLEEP) == 0); - VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, - devs, ndevs) == 0); - } -} - -/* - * Stop and drop level 2 ARC devices - */ -void -spa_l2cache_drop(spa_t *spa) -{ - vdev_t *vd; - int i; - spa_aux_vdev_t *sav = &spa->spa_l2cache; - - for (i = 0; i < sav->sav_count; i++) { - uint64_t pool; - - vd = sav->sav_vdevs[i]; - ASSERT(vd != NULL); - - if (spa_l2cache_exists(vd->vdev_guid, &pool) && - pool != 0ULL && l2arc_vdev_present(vd)) - l2arc_remove_vdev(vd); - } -} - -/* - * Pool Creation - */ -int -spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, - nvlist_t *zplprops) -{ - spa_t *spa; - char *altroot = NULL; - vdev_t *rvd; - dsl_pool_t *dp; - dmu_tx_t *tx; - int error = 0; - uint64_t txg = TXG_INITIAL; - nvlist_t **spares, **l2cache; - uint_t nspares, nl2cache; - uint64_t version, obj; - boolean_t has_features; - nvpair_t *elem; - int c, i; - char *poolname; - nvlist_t *nvl; - - if (nvlist_lookup_string(props, "tname", &poolname) != 0) - poolname = (char *)pool; - - /* - * If this pool already exists, return failure. - */ - mutex_enter(&spa_namespace_lock); - if (spa_lookup(poolname) != NULL) { - mutex_exit(&spa_namespace_lock); - return (SET_ERROR(EEXIST)); - } - - /* - * Allocate a new spa_t structure. - */ - nvl = fnvlist_alloc(); - fnvlist_add_string(nvl, ZPOOL_CONFIG_POOL_NAME, pool); - (void) nvlist_lookup_string(props, - zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); - spa = spa_add(poolname, nvl, altroot); - fnvlist_free(nvl); - spa_activate(spa, spa_mode_global); - - if (props && (error = spa_prop_validate(spa, props))) { - spa_deactivate(spa); - spa_remove(spa); - mutex_exit(&spa_namespace_lock); - return (error); - } - - /* - * Temporary pool names should never be written to disk. - */ - if (poolname != pool) - spa->spa_import_flags |= ZFS_IMPORT_TEMP_NAME; - - 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(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; - spa->spa_load_state = SPA_LOAD_CREATE; - - /* - * Create "The Godfather" zio to hold all async IOs - */ - spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *), - KM_SLEEP); - for (i = 0; i < max_ncpus; i++) { - spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL, - ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | - ZIO_FLAG_GODFATHER); - } - - /* - * Create the root vdev. - */ - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - - error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); - - ASSERT(error != 0 || rvd != NULL); - ASSERT(error != 0 || spa->spa_root_vdev == rvd); - - if (error == 0 && !zfs_allocatable_devs(nvroot)) - error = SET_ERROR(EINVAL); - - if (error == 0 && - (error = vdev_create(rvd, txg, B_FALSE)) == 0 && - (error = spa_validate_aux(spa, nvroot, txg, - VDEV_ALLOC_ADD)) == 0) { - for (c = 0; c < rvd->vdev_children; c++) { - vdev_metaslab_set_size(rvd->vdev_child[c]); - vdev_expand(rvd->vdev_child[c], txg); - } - } - - spa_config_exit(spa, SCL_ALL, FTAG); - - if (error != 0) { - spa_unload(spa); - spa_deactivate(spa); - spa_remove(spa); - mutex_exit(&spa_namespace_lock); - return (error); - } - - /* - * Get the list of spares, if specified. - */ - if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, - &spares, &nspares) == 0) { - VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, - KM_SLEEP) == 0); - VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, - ZPOOL_CONFIG_SPARES, spares, nspares) == 0); - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - spa_load_spares(spa); - spa_config_exit(spa, SCL_ALL, FTAG); - spa->spa_spares.sav_sync = B_TRUE; - } - - /* - * Get the list of level 2 cache devices, if specified. - */ - if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, - &l2cache, &nl2cache) == 0) { - VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, - NV_UNIQUE_NAME, KM_SLEEP) == 0); - VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, - ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - spa_load_l2cache(spa); - spa_config_exit(spa, SCL_ALL, FTAG); - spa->spa_l2cache.sav_sync = B_TRUE; - } - - spa->spa_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); - - /* - * Create the pool's history object. - */ - if (version >= SPA_VERSION_ZPOOL_HISTORY && !spa->spa_history) - spa_history_create_obj(spa, tx); - - spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_CREATE); - spa_history_log_version(spa, "create", tx); - - /* - * Create the pool config object. - */ - spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, - DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, - DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); - - if (zap_add(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, - sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { - cmn_err(CE_PANIC, "failed to add pool config"); - } - - if (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; - if (zap_add(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, - sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { - cmn_err(CE_PANIC, "failed to add deflate"); - } - } - - /* - * Create the deferred-free bpobj. Turn off compression - * because sync-to-convergence takes longer if the blocksize - * keeps changing. - */ - obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); - dmu_object_set_compress(spa->spa_meta_objset, obj, - ZIO_COMPRESS_OFF, tx); - if (zap_add(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, - sizeof (uint64_t), 1, &obj, tx) != 0) { - cmn_err(CE_PANIC, "failed to add bpobj"); - } - VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, - spa->spa_meta_objset, obj)); - - /* - * Generate some random noise for salted checksums to operate on. - */ - (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes, - sizeof (spa->spa_cksum_salt.zcs_bytes)); - - /* - * 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); - spa->spa_multihost = zpool_prop_default_numeric(ZPOOL_PROP_MULTIHOST); - - if (props != NULL) { - spa_configfile_set(spa, props, B_FALSE); - spa_sync_props(props, tx); - } - - dmu_tx_commit(tx); - - spa->spa_sync_on = B_TRUE; - txg_sync_start(spa->spa_dsl_pool); - mmp_thread_start(spa); - - /* - * 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); - - /* - * Don't count references from objsets that are already closed - * and are making their way through the eviction process. - */ - spa_evicting_os_wait(spa); - spa->spa_minref = refcount_count(&spa->spa_refcount); - spa->spa_load_state = SPA_LOAD_NONE; - - mutex_exit(&spa_namespace_lock); - - return (0); -} - -/* - * Import a non-root pool into the system. - */ -int -spa_import(char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) -{ - spa_t *spa; - char *altroot = NULL; - spa_load_state_t state = SPA_LOAD_IMPORT; - zpool_rewind_policy_t policy; - uint64_t mode = spa_mode_global; - uint64_t readonly = B_FALSE; - int error; - nvlist_t *nvroot; - nvlist_t **spares, **l2cache; - uint_t nspares, nl2cache; - - /* - * If a pool with this name exists, return failure. - */ - mutex_enter(&spa_namespace_lock); - if (spa_lookup(pool) != NULL) { - mutex_exit(&spa_namespace_lock); - return (SET_ERROR(EEXIST)); - } - - /* - * Create and initialize the spa structure. - */ - (void) nvlist_lookup_string(props, - zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); - (void) nvlist_lookup_uint64(props, - zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); - if (readonly) - mode = FREAD; - spa = spa_add(pool, config, altroot); - spa->spa_import_flags = flags; - - /* - * Verbatim import - Take a pool and insert it into the namespace - * as if it had been loaded at boot. - */ - if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { - if (props != NULL) - spa_configfile_set(spa, props, B_FALSE); - - spa_config_sync(spa, B_FALSE, B_TRUE); - spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_IMPORT); - - mutex_exit(&spa_namespace_lock); - return (0); - } - - spa_activate(spa, mode); - - /* - * Don't start async tasks until we know everything is healthy. - */ - spa_async_suspend(spa); - - zpool_get_rewind_policy(config, &policy); - if (policy.zrp_request & ZPOOL_DO_REWIND) - state = SPA_LOAD_RECOVER; - - /* - * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig - * because the user-supplied config is actually the one to trust when - * doing an import. - */ - if (state != SPA_LOAD_RECOVER) - spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; - - error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg, - policy.zrp_request); - - /* - * Propagate anything learned while loading the pool and pass it - * back to caller (i.e. rewind info, missing devices, etc). - */ - VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, - spa->spa_load_info) == 0); - - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - /* - * Toss any existing sparelist, as it doesn't have any validity - * anymore, and conflicts with spa_has_spare(). - */ - if (spa->spa_spares.sav_config) { - nvlist_free(spa->spa_spares.sav_config); - spa->spa_spares.sav_config = NULL; - spa_load_spares(spa); - } - if (spa->spa_l2cache.sav_config) { - nvlist_free(spa->spa_l2cache.sav_config); - spa->spa_l2cache.sav_config = NULL; - spa_load_l2cache(spa); - } - - VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, - &nvroot) == 0); - spa_config_exit(spa, SCL_ALL, FTAG); - - if (props != NULL) - spa_configfile_set(spa, props, B_FALSE); - - if (error != 0 || (props && spa_writeable(spa) && - (error = spa_prop_set(spa, props)))) { - spa_unload(spa); - spa_deactivate(spa); - spa_remove(spa); - mutex_exit(&spa_namespace_lock); - return (error); - } - - spa_async_resume(spa); - - /* - * Override any spares and level 2 cache devices as specified by - * the user, as these may have correct device names/devids, etc. - */ - if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, - &spares, &nspares) == 0) { - if (spa->spa_spares.sav_config) - VERIFY(nvlist_remove(spa->spa_spares.sav_config, - ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); - else - VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, - NV_UNIQUE_NAME, KM_SLEEP) == 0); - VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, - ZPOOL_CONFIG_SPARES, spares, nspares) == 0); - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - spa_load_spares(spa); - spa_config_exit(spa, SCL_ALL, FTAG); - spa->spa_spares.sav_sync = B_TRUE; - } - if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, - &l2cache, &nl2cache) == 0) { - if (spa->spa_l2cache.sav_config) - VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, - ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); - else - VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, - NV_UNIQUE_NAME, KM_SLEEP) == 0); - VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, - ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - spa_load_l2cache(spa); - spa_config_exit(spa, SCL_ALL, FTAG); - spa->spa_l2cache.sav_sync = B_TRUE; - } - - /* - * Check for any removed devices. - */ - if (spa->spa_autoreplace) { - spa_aux_check_removed(&spa->spa_spares); - spa_aux_check_removed(&spa->spa_l2cache); - } - - if (spa_writeable(spa)) { - /* - * Update the config cache to include the newly-imported pool. - */ - spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); - } - - /* - * It's possible that the pool was expanded while it was exported. - * We kick off an async task to handle this for us. - */ - spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); - - spa_history_log_version(spa, "import", NULL); - - spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_IMPORT); - - zvol_create_minors(spa, pool, B_TRUE); - - mutex_exit(&spa_namespace_lock); - - return (0); -} - -nvlist_t * -spa_tryimport(nvlist_t *tryconfig) -{ - nvlist_t *config = NULL; - char *poolname; - spa_t *spa; - uint64_t state; - int error; - - if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) - return (NULL); - - if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) - return (NULL); - - /* - * Create and initialize the spa structure. - */ - mutex_enter(&spa_namespace_lock); - spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); - spa_activate(spa, FREAD); - - /* - * Pass off the heavy lifting to spa_load(). - * Pass TRUE for mosconfig because the user-supplied config - * is actually the one to trust when doing an import. - */ - error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE); - - /* - * If 'tryconfig' was at least parsable, return the current config. - */ - if (spa->spa_root_vdev != NULL) { - config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); - VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, - poolname) == 0); - VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, - state) == 0); - VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, - spa->spa_uberblock.ub_timestamp) == 0); - VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, - spa->spa_load_info) == 0); - VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_ERRATA, - spa->spa_errata) == 0); - - /* - * If the bootfs property exists on this pool then we - * copy it out so that external consumers can tell which - * pools are bootable. - */ - if ((!error || error == EEXIST) && spa->spa_bootfs) { - char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); - - /* - * We have to play games with the name since the - * pool was opened as TRYIMPORT_NAME. - */ - if (dsl_dsobj_to_dsname(spa_name(spa), - spa->spa_bootfs, tmpname) == 0) { - char *cp; - char *dsname; - - dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); - - cp = strchr(tmpname, '/'); - if (cp == NULL) { - (void) strlcpy(dsname, tmpname, - MAXPATHLEN); - } else { - (void) snprintf(dsname, MAXPATHLEN, - "%s/%s", poolname, ++cp); - } - VERIFY(nvlist_add_string(config, - ZPOOL_CONFIG_BOOTFS, dsname) == 0); - kmem_free(dsname, MAXPATHLEN); - } - kmem_free(tmpname, MAXPATHLEN); - } - - /* - * Add the list of hot spares and level 2 cache devices. - */ - spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); - spa_add_spares(spa, config); - spa_add_l2cache(spa, config); - spa_config_exit(spa, SCL_CONFIG, FTAG); - } - - spa_unload(spa); - spa_deactivate(spa); - spa_remove(spa); - mutex_exit(&spa_namespace_lock); - - return (config); -} - -/* - * Pool export/destroy - * - * The act of destroying or exporting a pool is very simple. We make sure there - * is no more pending I/O and any references to the pool are gone. Then, we - * update the pool state and sync all the labels to disk, removing the - * configuration from the cache afterwards. If the 'hardforce' flag is set, then - * we don't sync the labels or remove the configuration cache. - */ -static int -spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, - boolean_t force, boolean_t hardforce) -{ - spa_t *spa; - - if (oldconfig) - *oldconfig = NULL; - - if (!(spa_mode_global & FWRITE)) - return (SET_ERROR(EROFS)); - - mutex_enter(&spa_namespace_lock); - if ((spa = spa_lookup(pool)) == NULL) { - mutex_exit(&spa_namespace_lock); - return (SET_ERROR(ENOENT)); - } - - /* - * Put a hold on the pool, drop the namespace lock, stop async tasks, - * reacquire the namespace lock, and see if we can export. - */ - spa_open_ref(spa, FTAG); - mutex_exit(&spa_namespace_lock); - spa_async_suspend(spa); - if (spa->spa_zvol_taskq) { - zvol_remove_minors(spa, spa_name(spa), B_TRUE); - taskq_wait(spa->spa_zvol_taskq); - } - mutex_enter(&spa_namespace_lock); - spa_close(spa, FTAG); - - if (spa->spa_state == POOL_STATE_UNINITIALIZED) - goto export_spa; - /* - * The pool will be in core if it's openable, in which case we can - * modify its state. Objsets may be open only because they're dirty, - * so we have to force it to sync before checking spa_refcnt. - */ - if (spa->spa_sync_on) { - txg_wait_synced(spa->spa_dsl_pool, 0); - spa_evicting_os_wait(spa); - } - - /* - * A pool cannot be exported or destroyed if there are active - * references. If we are resetting a pool, allow references by - * fault injection handlers. - */ - if (!spa_refcount_zero(spa) || - (spa->spa_inject_ref != 0 && - new_state != POOL_STATE_UNINITIALIZED)) { - spa_async_resume(spa); - mutex_exit(&spa_namespace_lock); - return (SET_ERROR(EBUSY)); - } - - if (spa->spa_sync_on) { - /* - * A pool cannot be exported if it has an active shared spare. - * This is to prevent other pools stealing the active spare - * from an exported pool. At user's own will, such pool can - * be forcedly exported. - */ - if (!force && new_state == POOL_STATE_EXPORTED && - spa_has_active_shared_spare(spa)) { - spa_async_resume(spa); - mutex_exit(&spa_namespace_lock); - return (SET_ERROR(EXDEV)); - } - - /* - * We want this to be reflected on every label, - * so mark them all dirty. spa_unload() will do the - * final sync that pushes these changes out. - */ - if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - spa->spa_state = new_state; - spa->spa_final_txg = spa_last_synced_txg(spa) + - TXG_DEFER_SIZE + 1; - vdev_config_dirty(spa->spa_root_vdev); - spa_config_exit(spa, SCL_ALL, FTAG); - } - } - -export_spa: - if (new_state == POOL_STATE_DESTROYED) - spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_DESTROY); - else if (new_state == POOL_STATE_EXPORTED) - spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_EXPORT); - - if (spa->spa_state != POOL_STATE_UNINITIALIZED) { - spa_unload(spa); - spa_deactivate(spa); - } - - if (oldconfig && spa->spa_config) - VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); - - if (new_state != POOL_STATE_UNINITIALIZED) { - if (!hardforce) - spa_config_sync(spa, B_TRUE, B_TRUE); - spa_remove(spa); - } - mutex_exit(&spa_namespace_lock); - - return (0); -} - -/* - * Destroy a storage pool. - */ -int -spa_destroy(char *pool) -{ - return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, - B_FALSE, B_FALSE)); -} - -/* - * Export a storage pool. - */ -int -spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, - boolean_t hardforce) -{ - return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, - force, hardforce)); -} - -/* - * Similar to spa_export(), this unloads the spa_t without actually removing it - * from the namespace in any way. - */ -int -spa_reset(char *pool) -{ - return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, - B_FALSE, B_FALSE)); -} - -/* - * ========================================================================== - * Device manipulation - * ========================================================================== - */ - -/* - * Add a device to a storage pool. - */ -int -spa_vdev_add(spa_t *spa, nvlist_t *nvroot) -{ - uint64_t txg, id; - int error; - vdev_t *rvd = spa->spa_root_vdev; - vdev_t *vd, *tvd; - nvlist_t **spares, **l2cache; - uint_t nspares, nl2cache; - int c; - - ASSERT(spa_writeable(spa)); - - txg = spa_vdev_enter(spa); - - if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, - VDEV_ALLOC_ADD)) != 0) - return (spa_vdev_exit(spa, NULL, txg, error)); - - spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ - - if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, - &nspares) != 0) - nspares = 0; - - if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, - &nl2cache) != 0) - nl2cache = 0; - - if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) - return (spa_vdev_exit(spa, vd, txg, EINVAL)); - - if (vd->vdev_children != 0 && - (error = vdev_create(vd, txg, B_FALSE)) != 0) - return (spa_vdev_exit(spa, vd, txg, error)); - - /* - * We must validate the spares and l2cache devices after checking the - * children. Otherwise, vdev_inuse() will blindly overwrite the spare. - */ - if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) - return (spa_vdev_exit(spa, vd, txg, error)); - - /* - * Transfer each new top-level vdev from vd to rvd. - */ - for (c = 0; c < vd->vdev_children; c++) { - - /* - * Set the vdev id to the first hole, if one exists. - */ - for (id = 0; id < rvd->vdev_children; id++) { - if (rvd->vdev_child[id]->vdev_ishole) { - vdev_free(rvd->vdev_child[id]); - break; - } - } - tvd = vd->vdev_child[c]; - vdev_remove_child(vd, tvd); - tvd->vdev_id = id; - vdev_add_child(rvd, tvd); - vdev_config_dirty(tvd); - } - - if (nspares != 0) { - spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, - ZPOOL_CONFIG_SPARES); - spa_load_spares(spa); - spa->spa_spares.sav_sync = B_TRUE; - } - - if (nl2cache != 0) { - spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, - ZPOOL_CONFIG_L2CACHE); - spa_load_l2cache(spa); - spa->spa_l2cache.sav_sync = B_TRUE; - } - - /* - * We have to be careful when adding new vdevs to an existing pool. - * If other threads start allocating from these vdevs before we - * sync the config cache, and we lose power, then upon reboot we may - * fail to open the pool because there are DVAs that the config cache - * can't translate. Therefore, we first add the vdevs without - * initializing metaslabs; sync the config cache (via spa_vdev_exit()); - * and then let spa_config_update() initialize the new metaslabs. - * - * spa_load() checks for added-but-not-initialized vdevs, so that - * if we lose power at any point in this sequence, the remaining - * steps will be completed the next time we load the pool. - */ - (void) spa_vdev_exit(spa, vd, txg, 0); - - mutex_enter(&spa_namespace_lock); - spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); - spa_event_notify(spa, NULL, NULL, ESC_ZFS_VDEV_ADD); - mutex_exit(&spa_namespace_lock); - - return (0); -} - -/* - * Attach a device to a mirror. The arguments are the path to any device - * in the mirror, and the nvroot for the new device. If the path specifies - * a device that is not mirrored, we automatically insert the mirror vdev. - * - * If 'replacing' is specified, the new device is intended to replace the - * existing device; in this case the two devices are made into their own - * mirror using the 'replacing' vdev, which is functionally identical to - * the mirror vdev (it actually reuses all the same ops) but has a few - * extra rules: you can't attach to it after it's been created, and upon - * completion of resilvering, the first disk (the one being replaced) - * is automatically detached. - */ -int -spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) -{ - uint64_t txg, dtl_max_txg; - vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; - vdev_ops_t *pvops; - char *oldvdpath, *newvdpath; - int newvd_isspare; - int error; - ASSERTV(vdev_t *rvd = spa->spa_root_vdev); - - ASSERT(spa_writeable(spa)); - - txg = spa_vdev_enter(spa); - - oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); - - if (oldvd == NULL) - return (spa_vdev_exit(spa, NULL, txg, ENODEV)); - - if (!oldvd->vdev_ops->vdev_op_leaf) - return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); - - pvd = oldvd->vdev_parent; - - if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, - VDEV_ALLOC_ATTACH)) != 0) - return (spa_vdev_exit(spa, NULL, txg, EINVAL)); - - if (newrootvd->vdev_children != 1) - return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); - - newvd = newrootvd->vdev_child[0]; - - if (!newvd->vdev_ops->vdev_op_leaf) - return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); - - if ((error = vdev_create(newrootvd, txg, replacing)) != 0) - return (spa_vdev_exit(spa, newrootvd, txg, error)); - - /* - * Spares can't replace logs - */ - if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) - return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); - - if (!replacing) { - /* - * For attach, the only allowable parent is a mirror or the root - * vdev. - */ - if (pvd->vdev_ops != &vdev_mirror_ops && - pvd->vdev_ops != &vdev_root_ops) - return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); - - pvops = &vdev_mirror_ops; - } else { - /* - * Active hot spares can only be replaced by inactive hot - * spares. - */ - if (pvd->vdev_ops == &vdev_spare_ops && - oldvd->vdev_isspare && - !spa_has_spare(spa, newvd->vdev_guid)) - return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); - - /* - * If the source is a hot spare, and the parent isn't already a - * spare, then we want to create a new hot spare. Otherwise, we - * want to create a replacing vdev. The user is not allowed to - * attach to a spared vdev child unless the 'isspare' state is - * the same (spare replaces spare, non-spare replaces - * non-spare). - */ - if (pvd->vdev_ops == &vdev_replacing_ops && - spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { - return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); - } else if (pvd->vdev_ops == &vdev_spare_ops && - newvd->vdev_isspare != oldvd->vdev_isspare) { - return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); - } - - if (newvd->vdev_isspare) - pvops = &vdev_spare_ops; - else - pvops = &vdev_replacing_ops; - } - - /* - * Make sure the new device is big enough. - */ - if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) - return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); - - /* - * The new device cannot have a higher alignment requirement - * than the top-level vdev. - */ - if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) - return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); - - /* - * If this is an in-place replacement, update oldvd's path and devid - * to make it distinguishable from newvd, and unopenable from now on. - */ - if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { - spa_strfree(oldvd->vdev_path); - oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, - KM_SLEEP); - (void) sprintf(oldvd->vdev_path, "%s/%s", - newvd->vdev_path, "old"); - if (oldvd->vdev_devid != NULL) { - spa_strfree(oldvd->vdev_devid); - oldvd->vdev_devid = NULL; - } - } - - /* mark the device being resilvered */ - newvd->vdev_resilver_txg = txg; - - /* - * If the parent is not a mirror, or if we're replacing, insert the new - * mirror/replacing/spare vdev above oldvd. - */ - if (pvd->vdev_ops != pvops) - pvd = vdev_add_parent(oldvd, pvops); - - ASSERT(pvd->vdev_top->vdev_parent == rvd); - ASSERT(pvd->vdev_ops == pvops); - ASSERT(oldvd->vdev_parent == pvd); - - /* - * Extract the new device from its root and add it to pvd. - */ - vdev_remove_child(newrootvd, newvd); - newvd->vdev_id = pvd->vdev_children; - newvd->vdev_crtxg = oldvd->vdev_crtxg; - vdev_add_child(pvd, newvd); - - /* - * Reevaluate the parent vdev state. - */ - vdev_propagate_state(pvd); - - tvd = newvd->vdev_top; - ASSERT(pvd->vdev_top == tvd); - ASSERT(tvd->vdev_parent == rvd); - - vdev_config_dirty(tvd); - - /* - * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account - * for any dmu_sync-ed blocks. It will propagate upward when - * spa_vdev_exit() calls vdev_dtl_reassess(). - */ - dtl_max_txg = txg + TXG_CONCURRENT_STATES; - - vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, - dtl_max_txg - TXG_INITIAL); - - if (newvd->vdev_isspare) { - spa_spare_activate(newvd); - spa_event_notify(spa, newvd, NULL, ESC_ZFS_VDEV_SPARE); - } - - oldvdpath = spa_strdup(oldvd->vdev_path); - newvdpath = spa_strdup(newvd->vdev_path); - newvd_isspare = newvd->vdev_isspare; - - /* - * Mark newvd's DTL dirty in this txg. - */ - vdev_dirty(tvd, VDD_DTL, newvd, txg); - - /* - * Schedule the resilver to restart in the future. We do this to - * ensure that dmu_sync-ed blocks have been stitched into the - * respective datasets. - */ - dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); - - if (spa->spa_bootfs) - spa_event_notify(spa, newvd, NULL, ESC_ZFS_BOOTFS_VDEV_ATTACH); - - spa_event_notify(spa, newvd, NULL, ESC_ZFS_VDEV_ATTACH); - - /* - * Commit the config - */ - (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); - - spa_history_log_internal(spa, "vdev attach", 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); - - return (0); -} - -/* - * Detach a device from a mirror or replacing vdev. - * - * If 'replace_done' is specified, only detach if the parent - * is a replacing vdev. - */ -int -spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) -{ - uint64_t txg; - int error; - vdev_t *vd, *pvd, *cvd, *tvd; - boolean_t unspare = B_FALSE; - uint64_t unspare_guid = 0; - char *vdpath; - int c, t; - ASSERTV(vdev_t *rvd = spa->spa_root_vdev); - ASSERT(spa_writeable(spa)); - - txg = spa_vdev_enter(spa); - - vd = spa_lookup_by_guid(spa, guid, B_FALSE); - - if (vd == NULL) - return (spa_vdev_exit(spa, NULL, txg, ENODEV)); - - if (!vd->vdev_ops->vdev_op_leaf) - return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); - - pvd = vd->vdev_parent; - - /* - * If the parent/child relationship is not as expected, don't do it. - * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing - * vdev that's replacing B with C. The user's intent in replacing - * is to go from M(A,B) to M(A,C). If the user decides to cancel - * the replace by detaching C, the expected behavior is to end up - * M(A,B). But suppose that right after deciding to detach C, - * the replacement of B completes. We would have M(A,C), and then - * ask to detach C, which would leave us with just A -- not what - * the user wanted. To prevent this, we make sure that the - * parent/child relationship hasn't changed -- in this example, - * that C's parent is still the replacing vdev R. - */ - if (pvd->vdev_guid != pguid && pguid != 0) - return (spa_vdev_exit(spa, NULL, txg, EBUSY)); - - /* - * Only 'replacing' or 'spare' vdevs can be replaced. - */ - if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && - pvd->vdev_ops != &vdev_spare_ops) - return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); - - ASSERT(pvd->vdev_ops != &vdev_spare_ops || - spa_version(spa) >= SPA_VERSION_SPARES); - - /* - * Only mirror, replacing, and spare vdevs support detach. - */ - if (pvd->vdev_ops != &vdev_replacing_ops && - pvd->vdev_ops != &vdev_mirror_ops && - pvd->vdev_ops != &vdev_spare_ops) - return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); - - /* - * If this device has the only valid copy of some data, - * we cannot safely detach it. - */ - if (vdev_dtl_required(vd)) - return (spa_vdev_exit(spa, NULL, txg, EBUSY)); - - ASSERT(pvd->vdev_children >= 2); - - /* - * If we are detaching the second disk from a replacing vdev, then - * check to see if we changed the original vdev's path to have "/old" - * at the end in spa_vdev_attach(). If so, undo that change now. - */ - if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && - vd->vdev_path != NULL) { - size_t len = strlen(vd->vdev_path); - - for (c = 0; c < pvd->vdev_children; c++) { - cvd = pvd->vdev_child[c]; - - if (cvd == vd || cvd->vdev_path == NULL) - continue; - - if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && - strcmp(cvd->vdev_path + len, "/old") == 0) { - spa_strfree(cvd->vdev_path); - cvd->vdev_path = spa_strdup(vd->vdev_path); - break; - } - } - } - - /* - * If we are detaching the original disk from a spare, then it implies - * that the spare should become a real disk, and be removed from the - * active spare list for the pool. - */ - if (pvd->vdev_ops == &vdev_spare_ops && - vd->vdev_id == 0 && - pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) - unspare = B_TRUE; - - /* - * Erase the disk labels so the disk can be used for other things. - * This must be done after all other error cases are handled, - * but before we disembowel vd (so we can still do I/O to it). - * But if we can't do it, don't treat the error as fatal -- - * it may be that the unwritability of the disk is the reason - * it's being detached! - */ - error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); - - /* - * Remove vd from its parent and compact the parent's children. - */ - vdev_remove_child(pvd, vd); - vdev_compact_children(pvd); - - /* - * Remember one of the remaining children so we can get tvd below. - */ - cvd = pvd->vdev_child[pvd->vdev_children - 1]; - - /* - * If we need to remove the remaining child from the list of hot spares, - * do it now, marking the vdev as no longer a spare in the process. - * We must do this before vdev_remove_parent(), because that can - * change the GUID if it creates a new toplevel GUID. For a similar - * reason, we must remove the spare now, in the same txg as the detach; - * otherwise someone could attach a new sibling, change the GUID, and - * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. - */ - if (unspare) { - ASSERT(cvd->vdev_isspare); - spa_spare_remove(cvd); - unspare_guid = cvd->vdev_guid; - (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); - cvd->vdev_unspare = B_TRUE; - } - - /* - * If the parent mirror/replacing vdev only has one child, - * the parent is no longer needed. Remove it from the tree. - */ - if (pvd->vdev_children == 1) { - if (pvd->vdev_ops == &vdev_spare_ops) - cvd->vdev_unspare = B_FALSE; - vdev_remove_parent(cvd); - } - - - /* - * We don't set tvd until now because the parent we just removed - * may have been the previous top-level vdev. - */ - tvd = cvd->vdev_top; - ASSERT(tvd->vdev_parent == rvd); - - /* - * Reevaluate the parent vdev state. - */ - vdev_propagate_state(cvd); - - /* - * If the 'autoexpand' property is set on the pool then automatically - * try to expand the size of the pool. For example if the device we - * just detached was smaller than the others, it may be possible to - * add metaslabs (i.e. grow the pool). We need to reopen the vdev - * first so that we can obtain the updated sizes of the leaf vdevs. - */ - if (spa->spa_autoexpand) { - vdev_reopen(tvd); - vdev_expand(tvd, txg); - } - - vdev_config_dirty(tvd); - - /* - * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that - * vd->vdev_detached is set and free vd's DTL object in syncing context. - * But first make sure we're not on any *other* txg's DTL list, to - * prevent vd from being accessed after it's freed. - */ - vdpath = spa_strdup(vd->vdev_path ? vd->vdev_path : "none"); - 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, NULL, ESC_ZFS_VDEV_REMOVE); - - /* hang on to the spa before we release the lock */ - spa_open_ref(spa, FTAG); - - error = spa_vdev_exit(spa, vd, txg, 0); - - spa_history_log_internal(spa, "detach", NULL, - "vdev=%s", vdpath); - spa_strfree(vdpath); - - /* - * If this was the removal of the original device in a hot spare vdev, - * then we want to go through and remove the device from the hot spare - * list of every other pool. - */ - if (unspare) { - spa_t *altspa = NULL; - - mutex_enter(&spa_namespace_lock); - while ((altspa = spa_next(altspa)) != NULL) { - if (altspa->spa_state != POOL_STATE_ACTIVE || - altspa == spa) - continue; - - spa_open_ref(altspa, FTAG); - mutex_exit(&spa_namespace_lock); - (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); - mutex_enter(&spa_namespace_lock); - spa_close(altspa, FTAG); - } - mutex_exit(&spa_namespace_lock); - - /* search the rest of the vdevs for spares to remove */ - spa_vdev_resilver_done(spa); - } - - /* all done with the spa; OK to release */ - mutex_enter(&spa_namespace_lock); - spa_close(spa, FTAG); - mutex_exit(&spa_namespace_lock); - - return (error); -} - -/* - * Split a set of devices from their mirrors, and create a new pool from them. - */ -int -spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, - nvlist_t *props, boolean_t exp) -{ - int error = 0; - uint64_t txg, *glist; - spa_t *newspa; - uint_t c, children, lastlog; - nvlist_t **child, *nvl, *tmp; - dmu_tx_t *tx; - char *altroot = NULL; - vdev_t *rvd, **vml = NULL; /* vdev modify list */ - boolean_t activate_slog; - - ASSERT(spa_writeable(spa)); - - txg = spa_vdev_enter(spa); - - /* clear the log and flush everything up to now */ - activate_slog = spa_passivate_log(spa); - (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); - error = spa_offline_log(spa); - txg = spa_vdev_config_enter(spa); - - if (activate_slog) - spa_activate_log(spa); - - if (error != 0) - return (spa_vdev_exit(spa, NULL, txg, error)); - - /* check new spa name before going any further */ - if (spa_lookup(newname) != NULL) - return (spa_vdev_exit(spa, NULL, txg, EEXIST)); - - /* - * scan through all the children to ensure they're all mirrors - */ - if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || - nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, - &children) != 0) - return (spa_vdev_exit(spa, NULL, txg, EINVAL)); - - /* first, check to ensure we've got the right child count */ - rvd = spa->spa_root_vdev; - lastlog = 0; - for (c = 0; c < rvd->vdev_children; c++) { - vdev_t *vd = rvd->vdev_child[c]; - - /* don't count the holes & logs as children */ - if (vd->vdev_islog || vd->vdev_ishole) { - if (lastlog == 0) - lastlog = c; - continue; - } - - lastlog = 0; - } - if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) - return (spa_vdev_exit(spa, NULL, txg, EINVAL)); - - /* next, ensure no spare or cache devices are part of the split */ - if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || - nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) - return (spa_vdev_exit(spa, NULL, txg, EINVAL)); - - vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); - glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); - - /* then, loop over each vdev and validate it */ - for (c = 0; c < children; c++) { - uint64_t is_hole = 0; - - (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, - &is_hole); - - if (is_hole != 0) { - if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || - spa->spa_root_vdev->vdev_child[c]->vdev_islog) { - continue; - } else { - error = SET_ERROR(EINVAL); - break; - } - } - - /* which disk is going to be split? */ - if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, - &glist[c]) != 0) { - error = SET_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 = SET_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 = SET_ERROR(EINVAL); - break; - } - - if (vdev_dtl_required(vml[c])) { - error = SET_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); - - /* transfer per-vdev ZAPs */ - ASSERT3U(vml[c]->vdev_leaf_zap, !=, 0); - VERIFY0(nvlist_add_uint64(child[c], - ZPOOL_CONFIG_VDEV_LEAF_ZAP, vml[c]->vdev_leaf_zap)); - - ASSERT3U(vml[c]->vdev_top->vdev_top_zap, !=, 0); - VERIFY0(nvlist_add_uint64(child[c], - ZPOOL_CONFIG_VDEV_TOP_ZAP, - vml[c]->vdev_parent->vdev_top_zap)); - } - - if (error != 0) { - kmem_free(vml, children * sizeof (vdev_t *)); - kmem_free(glist, children * sizeof (uint64_t)); - return (spa_vdev_exit(spa, NULL, txg, error)); - } - - /* stop writers from using the disks */ - for (c = 0; c < children; c++) { - if (vml[c] != NULL) - vml[c]->vdev_offline = B_TRUE; - } - vdev_reopen(spa->spa_root_vdev); - - /* - * Temporarily record the splitting vdevs in the spa config. This - * will disappear once the config is regenerated. - */ - VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); - VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, - glist, children) == 0); - kmem_free(glist, children * sizeof (uint64_t)); - - mutex_enter(&spa->spa_props_lock); - VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, - nvl) == 0); - mutex_exit(&spa->spa_props_lock); - spa->spa_config_splitting = nvl; - vdev_config_dirty(spa->spa_root_vdev); - - /* configure and create the new pool */ - VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); - VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, - exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); - VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, - spa_version(spa)) == 0); - VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, - spa->spa_config_txg) == 0); - VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, - spa_generate_guid(NULL)) == 0); - VERIFY0(nvlist_add_boolean(config, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)); - (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_avz_action = AVZ_ACTION_REBUILD; - newspa->spa_config_txg = spa->spa_config_txg; - spa_set_log_state(newspa, SPA_LOG_CLEAR); - - /* release the spa config lock, retaining the namespace lock */ - spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); - - if (zio_injection_enabled) - zio_handle_panic_injection(spa, FTAG, 1); - - spa_activate(newspa, spa_mode_global); - spa_async_suspend(newspa); - - /* create the new pool from the disks of the original pool */ - error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE); - if (error) - goto out; - - /* if that worked, generate a real config for the new pool */ - if (newspa->spa_root_vdev != NULL) { - VERIFY(nvlist_alloc(&newspa->spa_config_splitting, - NV_UNIQUE_NAME, KM_SLEEP) == 0); - VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, - ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); - spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, - B_TRUE)); - } - - /* set the props */ - if (props != NULL) { - spa_configfile_set(newspa, props, B_FALSE); - error = spa_prop_set(newspa, props); - if (error) - goto out; - } - - /* flush everything */ - txg = spa_vdev_config_enter(newspa); - vdev_config_dirty(newspa->spa_root_vdev); - (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); - - if (zio_injection_enabled) - zio_handle_panic_injection(spa, FTAG, 2); - - spa_async_resume(newspa); - - /* finally, update the original pool's config */ - txg = spa_vdev_config_enter(spa); - tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); - error = dmu_tx_assign(tx, TXG_WAIT); - if (error != 0) - dmu_tx_abort(tx); - for (c = 0; c < children; c++) { - if (vml[c] != NULL) { - vdev_split(vml[c]); - if (error == 0) - spa_history_log_internal(spa, "detach", tx, - "vdev=%s", vml[c]->vdev_path); - - vdev_free(vml[c]); - } - } - spa->spa_avz_action = AVZ_ACTION_REBUILD; - 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(newspa, "split", NULL, - "from pool %s", 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) -{ - int i; - - for (i = 0; i < count; i++) { - uint64_t guid; - - VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID, - &guid) == 0); - - if (guid == target_guid) - return (nvpp[i]); - } - - return (NULL); -} - -static void -spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, - nvlist_t *dev_to_remove) -{ - nvlist_t **newdev = NULL; - int i, j; - - if (count > 1) - newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); - - 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_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0); - VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0); - - for (i = 0; i < count - 1; i++) - nvlist_free(newdev[i]); - - if (count > 1) - kmem_free(newdev, (count - 1) * sizeof (void *)); -} - -/* - * Evacuate the device. - */ -static int -spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd) -{ - uint64_t txg; - int error = 0; - - ASSERT(MUTEX_HELD(&spa_namespace_lock)); - ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); - ASSERT(vd == vd->vdev_top); - - /* - * Evacuate the device. We don't hold the config lock as writer - * since we need to do I/O but we do keep the - * spa_namespace_lock held. Once this completes the device - * should no longer have any blocks allocated on it. - */ - if (vd->vdev_islog) { - if (vd->vdev_stat.vs_alloc != 0) - error = spa_offline_log(spa); - } else { - error = SET_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. - */ - ASSERT0(vd->vdev_stat.vs_alloc); - txg = spa_vdev_config_enter(spa); - vd->vdev_removing = B_TRUE; - vdev_dirty_leaves(vd, VDD_DTL, 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. - * - * Currently, this supports removing only hot spares, slogs, and level 2 ARC - * devices. - */ -int -spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) -{ - vdev_t *vd; - sysevent_t *ev = NULL; - metaslab_group_t *mg; - nvlist_t **spares, **l2cache, *nv; - uint64_t txg = 0; - uint_t nspares, nl2cache; - int error = 0; - boolean_t locked = MUTEX_HELD(&spa_namespace_lock); - - ASSERT(spa_writeable(spa)); - - if (!locked) - txg = spa_vdev_enter(spa); - - vd = spa_lookup_by_guid(spa, guid, B_FALSE); - - if (spa->spa_spares.sav_vdevs != NULL && - nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, - ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 && - (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) { - /* - * Only remove the hot spare if it's not currently in use - * in this pool. - */ - if (vd == NULL || unspare) { - if (vd == NULL) - vd = spa_lookup_by_guid(spa, guid, B_TRUE); - ev = spa_event_create(spa, vd, NULL, - ESC_ZFS_VDEV_REMOVE_AUX); - spa_vdev_remove_aux(spa->spa_spares.sav_config, - ZPOOL_CONFIG_SPARES, spares, nspares, nv); - spa_load_spares(spa); - spa->spa_spares.sav_sync = B_TRUE; - } else { - error = SET_ERROR(EBUSY); - } - } else if (spa->spa_l2cache.sav_vdevs != NULL && - nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, - ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 && - (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) { - /* - * Cache devices can always be removed. - */ - vd = spa_lookup_by_guid(spa, guid, B_TRUE); - ev = spa_event_create(spa, vd, NULL, ESC_ZFS_VDEV_REMOVE_AUX); - spa_vdev_remove_aux(spa->spa_l2cache.sav_config, - ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv); - spa_load_l2cache(spa); - spa->spa_l2cache.sav_sync = B_TRUE; - } else if (vd != NULL && vd->vdev_islog) { - ASSERT(!locked); - ASSERT(vd == vd->vdev_top); - - 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. - */ - ev = spa_event_create(spa, vd, NULL, ESC_ZFS_VDEV_REMOVE_DEV); - spa_vdev_remove_from_namespace(spa, vd); - - } else if (vd != NULL) { - /* - * Normal vdevs cannot be removed (yet). - */ - error = SET_ERROR(ENOTSUP); - } else { - /* - * There is no vdev of any kind with the specified guid. - */ - error = SET_ERROR(ENOENT); - } - - if (!locked) - error = spa_vdev_exit(spa, NULL, txg, error); - - if (ev) - spa_event_post(ev); - - return (error); -} - -/* - * Find any device that's done replacing, or a vdev marked 'unspare' that's - * currently spared, so we can detach it. - */ -static vdev_t * -spa_vdev_resilver_done_hunt(vdev_t *vd) -{ - vdev_t *newvd, *oldvd; - int c; - - for (c = 0; c < vd->vdev_children; c++) { - oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); - if (oldvd != NULL) - return (oldvd); - } - - /* - * Check for a completed replacement. We always consider the first - * vdev in the list to be the oldest vdev, and the last one to be - * the newest (see spa_vdev_attach() for how that works). In - * the case where the newest vdev is faulted, we will not automatically - * remove it after a resilver completes. This is OK as it will require - * user intervention to determine which disk the admin wishes to keep. - */ - if (vd->vdev_ops == &vdev_replacing_ops) { - ASSERT(vd->vdev_children > 1); - - newvd = vd->vdev_child[vd->vdev_children - 1]; - oldvd = vd->vdev_child[0]; - - if (vdev_dtl_empty(newvd, DTL_MISSING) && - vdev_dtl_empty(newvd, DTL_OUTAGE) && - !vdev_dtl_required(oldvd)) - return (oldvd); - } - - /* - * Check for a completed resilver with the 'unspare' flag set. - */ - if (vd->vdev_ops == &vdev_spare_ops) { - vdev_t *first = vd->vdev_child[0]; - vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; - - if (last->vdev_unspare) { - oldvd = first; - newvd = last; - } else if (first->vdev_unspare) { - oldvd = last; - newvd = first; - } else { - oldvd = NULL; - } - - if (oldvd != NULL && - vdev_dtl_empty(newvd, DTL_MISSING) && - vdev_dtl_empty(newvd, DTL_OUTAGE) && - !vdev_dtl_required(oldvd)) - return (oldvd); - - /* - * If there are more than two spares attached to a disk, - * and those spares are not required, then we want to - * attempt to free them up now so that they can be used - * by other pools. Once we're back down to a single - * disk+spare, we stop removing them. - */ - if (vd->vdev_children > 2) { - newvd = vd->vdev_child[1]; - - if (newvd->vdev_isspare && last->vdev_isspare && - vdev_dtl_empty(last, DTL_MISSING) && - vdev_dtl_empty(last, DTL_OUTAGE) && - !vdev_dtl_required(newvd)) - return (newvd); - } - } - - return (NULL); -} - -static void -spa_vdev_resilver_done(spa_t *spa) -{ - vdev_t *vd, *pvd, *ppvd; - uint64_t guid, sguid, pguid, ppguid; - - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - - while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { - pvd = vd->vdev_parent; - ppvd = pvd->vdev_parent; - guid = vd->vdev_guid; - pguid = pvd->vdev_guid; - ppguid = ppvd->vdev_guid; - sguid = 0; - /* - * If we have just finished replacing a hot spared device, then - * we need to detach the parent's first child (the original hot - * spare) as well. - */ - if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && - ppvd->vdev_children == 2) { - ASSERT(pvd->vdev_ops == &vdev_replacing_ops); - sguid = ppvd->vdev_child[1]->vdev_guid; - } - ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd)); - - spa_config_exit(spa, SCL_ALL, FTAG); - if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) - return; - if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) - return; - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - } - - spa_config_exit(spa, SCL_ALL, FTAG); -} - -/* - * Update the stored path or FRU for this vdev. - */ -int -spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, - boolean_t ispath) -{ - vdev_t *vd; - boolean_t sync = B_FALSE; - - ASSERT(spa_writeable(spa)); - - spa_vdev_state_enter(spa, SCL_ALL); - - if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) - return (spa_vdev_state_exit(spa, NULL, ENOENT)); - - if (!vd->vdev_ops->vdev_op_leaf) - return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); - - if (ispath) { - if (strcmp(value, vd->vdev_path) != 0) { - spa_strfree(vd->vdev_path); - vd->vdev_path = spa_strdup(value); - sync = B_TRUE; - } - } else { - if (vd->vdev_fru == NULL) { - vd->vdev_fru = spa_strdup(value); - sync = B_TRUE; - } else if (strcmp(value, vd->vdev_fru) != 0) { - spa_strfree(vd->vdev_fru); - vd->vdev_fru = spa_strdup(value); - sync = B_TRUE; - } - } - - return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); -} - -int -spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) -{ - return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); -} - -int -spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) -{ - return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); -} - -/* - * ========================================================================== - * SPA Scanning - * ========================================================================== - */ -int -spa_scrub_pause_resume(spa_t *spa, pool_scrub_cmd_t cmd) -{ - ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); - - if (dsl_scan_resilvering(spa->spa_dsl_pool)) - return (SET_ERROR(EBUSY)); - - return (dsl_scrub_set_pause_resume(spa->spa_dsl_pool, cmd)); -} - -int -spa_scan_stop(spa_t *spa) -{ - ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); - if (dsl_scan_resilvering(spa->spa_dsl_pool)) - return (SET_ERROR(EBUSY)); - return (dsl_scan_cancel(spa->spa_dsl_pool)); -} - -int -spa_scan(spa_t *spa, pool_scan_func_t func) -{ - ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); - - if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) - return (SET_ERROR(ENOTSUP)); - - /* - * If a resilver was requested, but there is no DTL on a - * writeable leaf device, we have nothing to do. - */ - if (func == POOL_SCAN_RESILVER && - !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { - spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); - return (0); - } - - return (dsl_scan(spa->spa_dsl_pool, func)); -} - -/* - * ========================================================================== - * SPA async task processing - * ========================================================================== - */ - -static void -spa_async_remove(spa_t *spa, vdev_t *vd) -{ - int c; - - if (vd->vdev_remove_wanted) { - vd->vdev_remove_wanted = B_FALSE; - vd->vdev_delayed_close = B_FALSE; - vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); - - /* - * We want to clear the stats, but we don't want to do a full - * vdev_clear() as that will cause us to throw away - * degraded/faulted state as well as attempt to reopen the - * device, all of which is a waste. - */ - vd->vdev_stat.vs_read_errors = 0; - vd->vdev_stat.vs_write_errors = 0; - vd->vdev_stat.vs_checksum_errors = 0; - - vdev_state_dirty(vd->vdev_top); - } - - for (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 = B_FALSE; - vdev_reopen(vd); /* vdev_open() does the actual probe */ - } - - 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, NULL, ESC_ZFS_VDEV_AUTOEXPAND); -} - -static void -spa_async_thread(spa_t *spa) -{ - int tasks, i; - - ASSERT(spa->spa_sync_on); - - mutex_enter(&spa->spa_async_lock); - tasks = spa->spa_async_tasks; - spa->spa_async_tasks = 0; - mutex_exit(&spa->spa_async_lock); - - /* - * See if the config needs to be updated. - */ - if (tasks & SPA_ASYNC_CONFIG_UPDATE) { - uint64_t old_space, new_space; - - mutex_enter(&spa_namespace_lock); - old_space = metaslab_class_get_space(spa_normal_class(spa)); - spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); - new_space = metaslab_class_get_space(spa_normal_class(spa)); - mutex_exit(&spa_namespace_lock); - - /* - * If the pool grew as a result of the config update, - * then log an internal history event. - */ - if (new_space != old_space) { - spa_history_log_internal(spa, "vdev online", NULL, - "pool '%s' size: %llu(+%llu)", - spa_name(spa), new_space, new_space - old_space); - } - } - - /* - * See if any devices need to be marked REMOVED. - */ - if (tasks & SPA_ASYNC_REMOVE) { - spa_vdev_state_enter(spa, SCL_NONE); - spa_async_remove(spa, spa->spa_root_vdev); - for (i = 0; i < spa->spa_l2cache.sav_count; i++) - spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[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, SCL_NONE); - spa_async_probe(spa, spa->spa_root_vdev); - (void) spa_vdev_state_exit(spa, NULL, 0); - } - - /* - * If any devices are done replacing, detach them. - */ - if (tasks & SPA_ASYNC_RESILVER_DONE) - spa_vdev_resilver_done(spa); - - /* - * Kick off a resilver. - */ - if (tasks & SPA_ASYNC_RESILVER) - dsl_resilver_restart(spa->spa_dsl_pool, 0); - - /* - * Let the world know that we're done. - */ - mutex_enter(&spa->spa_async_lock); - spa->spa_async_thread = NULL; - cv_broadcast(&spa->spa_async_cv); - mutex_exit(&spa->spa_async_lock); - thread_exit(); -} - -void -spa_async_suspend(spa_t *spa) -{ - mutex_enter(&spa->spa_async_lock); - spa->spa_async_suspended++; - while (spa->spa_async_thread != NULL) - cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); - mutex_exit(&spa->spa_async_lock); -} - -void -spa_async_resume(spa_t *spa) -{ - mutex_enter(&spa->spa_async_lock); - ASSERT(spa->spa_async_suspended != 0); - spa->spa_async_suspended--; - mutex_exit(&spa->spa_async_lock); -} - -static boolean_t -spa_async_tasks_pending(spa_t *spa) -{ - uint_t non_config_tasks; - uint_t config_task; - boolean_t config_task_suspended; - - non_config_tasks = spa->spa_async_tasks & ~SPA_ASYNC_CONFIG_UPDATE; - config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE; - if (spa->spa_ccw_fail_time == 0) { - config_task_suspended = B_FALSE; - } else { - config_task_suspended = - (gethrtime() - spa->spa_ccw_fail_time) < - ((hrtime_t)zfs_ccw_retry_interval * NANOSEC); - } - - return (non_config_tasks || (config_task && !config_task_suspended)); -} - -static void -spa_async_dispatch(spa_t *spa) -{ - mutex_enter(&spa->spa_async_lock); - if (spa_async_tasks_pending(spa) && - !spa->spa_async_suspended && - spa->spa_async_thread == NULL && - rootdir != NULL) - spa->spa_async_thread = thread_create(NULL, 0, - spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); - mutex_exit(&spa->spa_async_lock); -} - -void -spa_async_request(spa_t *spa, int task) -{ - zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); - mutex_enter(&spa->spa_async_lock); - spa->spa_async_tasks |= task; - mutex_exit(&spa->spa_async_lock); -} - -/* - * ========================================================================== - * SPA syncing routines - * ========================================================================== - */ - -static int -bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) -{ - bpobj_t *bpo = arg; - bpobj_enqueue(bpo, bp, tx); - return (0); -} - -static int -spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) -{ - zio_t *zio = arg; - - zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, - zio->io_flags)); - return (0); -} - -/* - * Note: this simple function is not inlined to make it easier to dtrace the - * amount of time spent syncing frees. - */ -static void -spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx) -{ - zio_t *zio = zio_root(spa, NULL, NULL, 0); - bplist_iterate(bpl, spa_free_sync_cb, zio, tx); - VERIFY(zio_wait(zio) == 0); -} - -/* - * Note: this simple function is not inlined to make it easier to dtrace the - * amount of time spent syncing deferred frees. - */ -static void -spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx) -{ - zio_t *zio = zio_root(spa, NULL, NULL, 0); - VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj, - spa_free_sync_cb, zio, tx), ==, 0); - VERIFY0(zio_wait(zio)); -} - -static void -spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) -{ - char *packed = NULL; - size_t bufsize; - size_t nvsize = 0; - dmu_buf_t *db; - - VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); - - /* - * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration - * information. This avoids the dmu_buf_will_dirty() path and - * saves us a pre-read to get data we don't actually care about. - */ - bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); - packed = vmem_alloc(bufsize, KM_SLEEP); - - VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, - KM_SLEEP) == 0); - bzero(packed + nvsize, bufsize - nvsize); - - dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); - - vmem_free(packed, bufsize); - - VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); - dmu_buf_will_dirty(db, tx); - *(uint64_t *)db->db_data = nvsize; - dmu_buf_rele(db, FTAG); -} - -static void -spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, - const char *config, const char *entry) -{ - nvlist_t *nvroot; - nvlist_t **list; - int i; - - if (!sav->sav_sync) - return; - - /* - * Update the MOS nvlist describing the list of available devices. - * spa_validate_aux() will have already made sure this nvlist is - * valid and the vdevs are labeled appropriately. - */ - if (sav->sav_object == 0) { - sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, - DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, - sizeof (uint64_t), tx); - VERIFY(zap_update(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, - &sav->sav_object, tx) == 0); - } - - VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); - if (sav->sav_count == 0) { - VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); - } else { - list = kmem_alloc(sav->sav_count*sizeof (void *), KM_SLEEP); - for (i = 0; i < sav->sav_count; i++) - list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], - B_FALSE, VDEV_CONFIG_L2CACHE); - VERIFY(nvlist_add_nvlist_array(nvroot, config, list, - sav->sav_count) == 0); - for (i = 0; i < sav->sav_count; i++) - nvlist_free(list[i]); - kmem_free(list, sav->sav_count * sizeof (void *)); - } - - spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); - nvlist_free(nvroot); - - sav->sav_sync = B_FALSE; -} - -/* - * Rebuild spa's all-vdev ZAP from the vdev ZAPs indicated in each vdev_t. - * The all-vdev ZAP must be empty. - */ -static void -spa_avz_build(vdev_t *vd, uint64_t avz, dmu_tx_t *tx) -{ - spa_t *spa = vd->vdev_spa; - uint64_t i; - - if (vd->vdev_top_zap != 0) { - VERIFY0(zap_add_int(spa->spa_meta_objset, avz, - vd->vdev_top_zap, tx)); - } - if (vd->vdev_leaf_zap != 0) { - VERIFY0(zap_add_int(spa->spa_meta_objset, avz, - vd->vdev_leaf_zap, tx)); - } - for (i = 0; i < vd->vdev_children; i++) { - spa_avz_build(vd->vdev_child[i], avz, tx); - } -} - -static void -spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) -{ - nvlist_t *config; - - /* - * If the pool is being imported from a pre-per-vdev-ZAP version of ZFS, - * its config may not be dirty but we still need to build per-vdev ZAPs. - * Similarly, if the pool is being assembled (e.g. after a split), we - * need to rebuild the AVZ although the config may not be dirty. - */ - if (list_is_empty(&spa->spa_config_dirty_list) && - spa->spa_avz_action == AVZ_ACTION_NONE) - return; - - spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); - - ASSERT(spa->spa_avz_action == AVZ_ACTION_NONE || - spa->spa_avz_action == AVZ_ACTION_INITIALIZE || - spa->spa_all_vdev_zaps != 0); - - if (spa->spa_avz_action == AVZ_ACTION_REBUILD) { - zap_cursor_t zc; - zap_attribute_t za; - - /* Make and build the new AVZ */ - uint64_t new_avz = zap_create(spa->spa_meta_objset, - DMU_OTN_ZAP_METADATA, DMU_OT_NONE, 0, tx); - spa_avz_build(spa->spa_root_vdev, new_avz, tx); - - /* Diff old AVZ with new one */ - for (zap_cursor_init(&zc, spa->spa_meta_objset, - spa->spa_all_vdev_zaps); - zap_cursor_retrieve(&zc, &za) == 0; - zap_cursor_advance(&zc)) { - uint64_t vdzap = za.za_first_integer; - if (zap_lookup_int(spa->spa_meta_objset, new_avz, - vdzap) == ENOENT) { - /* - * ZAP is listed in old AVZ but not in new one; - * destroy it - */ - VERIFY0(zap_destroy(spa->spa_meta_objset, vdzap, - tx)); - } - } - - zap_cursor_fini(&zc); - - /* Destroy the old AVZ */ - VERIFY0(zap_destroy(spa->spa_meta_objset, - spa->spa_all_vdev_zaps, tx)); - - /* Replace the old AVZ in the dir obj with the new one */ - VERIFY0(zap_update(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_VDEV_ZAP_MAP, - sizeof (new_avz), 1, &new_avz, tx)); - - spa->spa_all_vdev_zaps = new_avz; - } else if (spa->spa_avz_action == AVZ_ACTION_DESTROY) { - zap_cursor_t zc; - zap_attribute_t za; - - /* Walk through the AVZ and destroy all listed ZAPs */ - for (zap_cursor_init(&zc, spa->spa_meta_objset, - spa->spa_all_vdev_zaps); - zap_cursor_retrieve(&zc, &za) == 0; - zap_cursor_advance(&zc)) { - uint64_t zap = za.za_first_integer; - VERIFY0(zap_destroy(spa->spa_meta_objset, zap, tx)); - } - - zap_cursor_fini(&zc); - - /* Destroy and unlink the AVZ itself */ - VERIFY0(zap_destroy(spa->spa_meta_objset, - spa->spa_all_vdev_zaps, tx)); - VERIFY0(zap_remove(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_VDEV_ZAP_MAP, tx)); - spa->spa_all_vdev_zaps = 0; - } - - if (spa->spa_all_vdev_zaps == 0) { - spa->spa_all_vdev_zaps = zap_create_link(spa->spa_meta_objset, - DMU_OTN_ZAP_METADATA, DMU_POOL_DIRECTORY_OBJECT, - DMU_POOL_VDEV_ZAP_MAP, tx); - } - spa->spa_avz_action = AVZ_ACTION_NONE; - - /* Create ZAPs for vdevs that don't have them. */ - vdev_construct_zaps(spa->spa_root_vdev, 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); - - nvlist_free(spa->spa_config_syncing); - spa->spa_config_syncing = config; - - spa_sync_nvlist(spa, spa->spa_config_object, config, tx); -} - -static void -spa_sync_version(void *arg, dmu_tx_t *tx) -{ - uint64_t *versionp = arg; - uint64_t version = *versionp; - spa_t *spa = dmu_tx_pool(tx)->dp_spa; - - /* - * 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); - spa_history_log_internal(spa, "set", tx, "version=%lld", version); -} - -/* - * Set zpool properties. - */ -static void -spa_sync_props(void *arg, dmu_tx_t *tx) -{ - nvlist_t *nvp = arg; - spa_t *spa = dmu_tx_pool(tx)->dp_spa; - objset_t *mos = spa->spa_meta_objset; - nvpair_t *elem = NULL; - - mutex_enter(&spa->spa_props_lock); - - while ((elem = nvlist_next_nvpair(nvp, elem))) { - uint64_t intval; - char *strval, *fname; - zpool_prop_t prop; - const char *propname; - zprop_type_t proptype; - spa_feature_t fid; - - 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; - VERIFY0(zfeature_lookup_name(fname, &fid)); - - spa_feature_enable(spa, fid, tx); - spa_history_log_internal(spa, "set", tx, - "%s=enabled", nvpair_name(elem)); - break; - - case ZPOOL_PROP_VERSION: - intval = fnvpair_value_uint64(elem); - /* - * The version is synced separately before other - * properties and should be correct by now. - */ - ASSERT3U(spa_version(spa), >=, intval); - break; - - case ZPOOL_PROP_ALTROOT: - /* - * 'altroot' is a non-persistent property. It should - * have been set temporarily at creation or import time. - */ - ASSERT(spa->spa_root != NULL); - break; - - case ZPOOL_PROP_READONLY: - case ZPOOL_PROP_CACHEFILE: - /* - * 'readonly' and 'cachefile' are also non-persisitent - * properties. - */ - break; - case ZPOOL_PROP_COMMENT: - strval = fnvpair_value_string(elem); - 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 - * configuration has already been dirtied. - */ - if (tx->tx_txg != TXG_INITIAL) - vdev_config_dirty(spa->spa_root_vdev); - spa_history_log_internal(spa, "set", tx, - "%s=%s", nvpair_name(elem), strval); - break; - default: - /* - * Set pool property values in the poolprops mos object. - */ - if (spa->spa_pool_props_object == 0) { - spa->spa_pool_props_object = - zap_create_link(mos, DMU_OT_POOL_PROPS, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, - tx); - } - - /* normalize the property name */ - propname = zpool_prop_to_name(prop); - proptype = zpool_prop_get_type(prop); - - if (nvpair_type(elem) == DATA_TYPE_STRING) { - ASSERT(proptype == PROP_TYPE_STRING); - strval = fnvpair_value_string(elem); - VERIFY0(zap_update(mos, - spa->spa_pool_props_object, propname, - 1, strlen(strval) + 1, strval, tx)); - spa_history_log_internal(spa, "set", tx, - "%s=%s", nvpair_name(elem), strval); - } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { - intval = fnvpair_value_uint64(elem); - - if (proptype == PROP_TYPE_INDEX) { - const char *unused; - VERIFY0(zpool_prop_index_to_string( - prop, intval, &unused)); - } - VERIFY0(zap_update(mos, - spa->spa_pool_props_object, propname, - 8, 1, &intval, tx)); - spa_history_log_internal(spa, "set", tx, - "%s=%lld", nvpair_name(elem), intval); - } else { - ASSERT(0); /* not allowed */ - } - - switch (prop) { - case ZPOOL_PROP_DELEGATION: - spa->spa_delegation = intval; - break; - case ZPOOL_PROP_BOOTFS: - spa->spa_bootfs = intval; - break; - case ZPOOL_PROP_FAILUREMODE: - spa->spa_failmode = intval; - break; - case ZPOOL_PROP_AUTOEXPAND: - spa->spa_autoexpand = intval; - if (tx->tx_txg != TXG_INITIAL) - spa_async_request(spa, - SPA_ASYNC_AUTOEXPAND); - break; - case ZPOOL_PROP_MULTIHOST: - spa->spa_multihost = intval; - break; - case ZPOOL_PROP_DEDUPDITTO: - spa->spa_dedup_ditto = intval; - break; - default: - break; - } - } - - } - - mutex_exit(&spa->spa_props_lock); -} - -/* - * Perform one-time upgrade on-disk changes. spa_version() does not - * reflect the new version this txg, so there must be no changes this - * txg to anything that the upgrade code depends on after it executes. - * Therefore this must be called after dsl_pool_sync() does the sync - * tasks. - */ -static void -spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) -{ - dsl_pool_t *dp = spa->spa_dsl_pool; - - ASSERT(spa->spa_sync_pass == 1); - - rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG); - - 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); - } - - /* - * LZ4_COMPRESS feature's behaviour was changed to activate_on_enable - * when possibility to use lz4 compression for metadata was added - * Old pools that have this feature enabled must be upgraded to have - * this feature active - */ - if (spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { - boolean_t lz4_en = spa_feature_is_enabled(spa, - SPA_FEATURE_LZ4_COMPRESS); - boolean_t lz4_ac = spa_feature_is_active(spa, - SPA_FEATURE_LZ4_COMPRESS); - - if (lz4_en && !lz4_ac) - spa_feature_incr(spa, SPA_FEATURE_LZ4_COMPRESS, tx); - } - - /* - * If we haven't written the salt, do so now. Note that the - * feature may not be activated yet, but that's fine since - * the presence of this ZAP entry is backwards compatible. - */ - if (zap_contains(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, - DMU_POOL_CHECKSUM_SALT) == ENOENT) { - VERIFY0(zap_add(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CHECKSUM_SALT, 1, - sizeof (spa->spa_cksum_salt.zcs_bytes), - spa->spa_cksum_salt.zcs_bytes, tx)); - } - - rrw_exit(&dp->dp_config_rwlock, FTAG); -} - -/* - * Sync the specified transaction group. New blocks may be dirtied as - * part of the process, so we iterate until it converges. - */ -void -spa_sync(spa_t *spa, uint64_t txg) -{ - dsl_pool_t *dp = spa->spa_dsl_pool; - objset_t *mos = spa->spa_meta_objset; - bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; - metaslab_class_t *mc; - vdev_t *rvd = spa->spa_root_vdev; - vdev_t *vd; - dmu_tx_t *tx; - int error; - uint32_t max_queue_depth = zfs_vdev_async_write_max_active * - zfs_vdev_queue_depth_pct / 100; - uint64_t queue_depth_total; - int c; - - VERIFY(spa_writeable(spa)); - - /* - * Lock out configuration changes. - */ - spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); - - spa->spa_syncing_txg = txg; - spa->spa_sync_pass = 0; - - mutex_enter(&spa->spa_alloc_lock); - VERIFY0(avl_numnodes(&spa->spa_alloc_tree)); - mutex_exit(&spa->spa_alloc_lock); - - /* - * If there are any pending vdev state changes, convert them - * into config changes that go out with this transaction group. - */ - spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); - while (list_head(&spa->spa_state_dirty_list) != NULL) { - /* - * We need the write lock here because, for aux vdevs, - * calling vdev_config_dirty() modifies sav_config. - * This is ugly and will become unnecessary when we - * eliminate the aux vdev wart by integrating all vdevs - * into the root vdev tree. - */ - spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); - spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); - while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { - vdev_state_clean(vd); - vdev_config_dirty(vd); - } - spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); - spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); - } - spa_config_exit(spa, SCL_STATE, FTAG); - - tx = dmu_tx_create_assigned(dp, txg); - - spa->spa_sync_starttime = gethrtime(); - taskq_cancel_id(system_delay_taskq, spa->spa_deadman_tqid); - spa->spa_deadman_tqid = taskq_dispatch_delay(system_delay_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. - */ - if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && - spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { - int i; - - for (i = 0; i < rvd->vdev_children; i++) { - vd = rvd->vdev_child[i]; - if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) - break; - } - if (i == rvd->vdev_children) { - spa->spa_deflate = TRUE; - VERIFY(0 == zap_add(spa->spa_meta_objset, - DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, - sizeof (uint64_t), 1, &spa->spa_deflate, tx)); - } - } - - /* - * Set the top-level vdev's max queue depth. Evaluate each - * top-level's async write queue depth in case it changed. - * The max queue depth will not change in the middle of syncing - * out this txg. - */ - queue_depth_total = 0; - for (c = 0; c < rvd->vdev_children; c++) { - vdev_t *tvd = rvd->vdev_child[c]; - metaslab_group_t *mg = tvd->vdev_mg; - - if (mg == NULL || mg->mg_class != spa_normal_class(spa) || - !metaslab_group_initialized(mg)) - continue; - - /* - * It is safe to do a lock-free check here because only async - * allocations look at mg_max_alloc_queue_depth, and async - * allocations all happen from spa_sync(). - */ - ASSERT0(refcount_count(&mg->mg_alloc_queue_depth)); - mg->mg_max_alloc_queue_depth = max_queue_depth; - queue_depth_total += mg->mg_max_alloc_queue_depth; - } - mc = spa_normal_class(spa); - ASSERT0(refcount_count(&mc->mc_alloc_slots)); - mc->mc_alloc_max_slots = queue_depth_total; - mc->mc_alloc_throttle_enabled = zio_dva_throttle_enabled; - - ASSERT3U(mc->mc_alloc_max_slots, <=, - max_queue_depth * rvd->vdev_children); - - /* - * Iterate to convergence. - */ - do { - int pass = ++spa->spa_sync_pass; - - spa_sync_config_object(spa, tx); - spa_sync_aux_dev(spa, &spa->spa_spares, tx, - ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); - spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, - ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); - spa_errlog_sync(spa, txg); - dsl_pool_sync(dp, txg); - - if (pass < zfs_sync_pass_deferred_free) { - spa_sync_frees(spa, free_bpl, tx); - } else { - /* - * We can not defer frees in pass 1, because - * we sync the deferred frees later in pass 1. - */ - ASSERT3U(pass, >, 1); - bplist_iterate(free_bpl, bpobj_enqueue_cb, - &spa->spa_deferred_bpobj, tx); - } - - ddt_sync(spa, txg); - dsl_scan_sync(dp, tx); - - while ((vd = txg_list_remove(&spa->spa_vdev_txg_list, txg))) - vdev_sync(vd, txg); - - if (pass == 1) { - spa_sync_upgrades(spa, tx); - ASSERT3U(txg, >=, - spa->spa_uberblock.ub_rootbp.blk_birth); - /* - * Note: We need to check if the MOS is dirty - * because we could have marked the MOS dirty - * without updating the uberblock (e.g. if we - * have sync tasks but no dirty user data). We - * need to check the uberblock's rootbp because - * it is updated if we have synced out dirty - * data (though in this case the MOS will most - * likely also be dirty due to second order - * effects, we don't want to rely on that here). - */ - if (spa->spa_uberblock.ub_rootbp.blk_birth < txg && - !dmu_objset_is_dirty(mos, txg)) { - /* - * Nothing changed on the first pass, - * therefore this TXG is a no-op. Avoid - * syncing deferred frees, so that we - * can keep this TXG as a no-op. - */ - ASSERT(txg_list_empty(&dp->dp_dirty_datasets, - txg)); - ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); - ASSERT(txg_list_empty(&dp->dp_sync_tasks, txg)); - break; - } - spa_sync_deferred_frees(spa, tx); - } - - } while (dmu_objset_is_dirty(mos, txg)); - -#ifdef ZFS_DEBUG - if (!list_is_empty(&spa->spa_config_dirty_list)) { - /* - * Make sure that the number of ZAPs for all the vdevs matches - * the number of ZAPs in the per-vdev ZAP list. This only gets - * called if the config is dirty; otherwise there may be - * outstanding AVZ operations that weren't completed in - * spa_sync_config_object. - */ - uint64_t all_vdev_zap_entry_count; - ASSERT0(zap_count(spa->spa_meta_objset, - spa->spa_all_vdev_zaps, &all_vdev_zap_entry_count)); - ASSERT3U(vdev_count_verify_zaps(spa->spa_root_vdev), ==, - all_vdev_zap_entry_count); - } -#endif - - /* - * Rewrite the vdev configuration (which includes the uberblock) - * to commit the transaction group. - * - * If there are no dirty vdevs, we sync the uberblock to a few - * random top-level vdevs that are known to be visible in the - * config cache (see spa_vdev_add() for a complete description). - * If there *are* dirty vdevs, sync the uberblock to all vdevs. - */ - for (;;) { - /* - * We hold SCL_STATE to prevent vdev open/close/etc. - * while we're attempting to write the vdev labels. - */ - spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); - - if (list_is_empty(&spa->spa_config_dirty_list)) { - vdev_t *svd[SPA_DVAS_PER_BP]; - int svdcount = 0; - int children = rvd->vdev_children; - int c0 = spa_get_random(children); - - for (c = 0; c < children; c++) { - vd = rvd->vdev_child[(c0 + c) % children]; - if (vd->vdev_ms_array == 0 || vd->vdev_islog) - continue; - svd[svdcount++] = vd; - if (svdcount == SPA_DVAS_PER_BP) - break; - } - error = vdev_config_sync(svd, svdcount, txg); - } else { - error = vdev_config_sync(rvd->vdev_child, - rvd->vdev_children, txg); - } - - if (error == 0) - spa->spa_last_synced_guid = rvd->vdev_guid; - - spa_config_exit(spa, SCL_STATE, FTAG); - - if (error == 0) - break; - zio_suspend(spa, NULL); - zio_resume_wait(spa); - } - dmu_tx_commit(tx); - - taskq_cancel_id(system_delay_taskq, spa->spa_deadman_tqid); - spa->spa_deadman_tqid = 0; - - /* - * Clear the dirty config list. - */ - while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) - vdev_config_clean(vd); - - /* - * Now that the new config has synced transactionally, - * let it become visible to the config cache. - */ - if (spa->spa_config_syncing != NULL) { - spa_config_set(spa, spa->spa_config_syncing); - spa->spa_config_txg = txg; - spa->spa_config_syncing = NULL; - } - - dsl_pool_sync_done(dp, txg); - - mutex_enter(&spa->spa_alloc_lock); - VERIFY0(avl_numnodes(&spa->spa_alloc_tree)); - mutex_exit(&spa->spa_alloc_lock); - - /* - * Update usable space statistics. - */ - while ((vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg)))) - vdev_sync_done(vd, txg); - - spa_update_dspace(spa); - - /* - * It had better be the case that we didn't dirty anything - * since vdev_config_sync(). - */ - ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); - ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); - ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); - - spa->spa_sync_pass = 0; - - /* - * Update the last synced uberblock here. We want to do this at - * the end of spa_sync() so that consumers of spa_last_synced_txg() - * will be guaranteed that all the processing associated with - * that txg has been completed. - */ - spa->spa_ubsync = spa->spa_uberblock; - spa_config_exit(spa, SCL_CONFIG, FTAG); - - spa_handle_ignored_writes(spa); - - /* - * If any async tasks have been requested, kick them off. - */ - spa_async_dispatch(spa); -} - -/* - * Sync all pools. We don't want to hold the namespace lock across these - * operations, so we take a reference on the spa_t and drop the lock during the - * sync. - */ -void -spa_sync_allpools(void) -{ - spa_t *spa = NULL; - mutex_enter(&spa_namespace_lock); - while ((spa = spa_next(spa)) != NULL) { - if (spa_state(spa) != POOL_STATE_ACTIVE || - !spa_writeable(spa) || spa_suspended(spa)) - continue; - spa_open_ref(spa, FTAG); - mutex_exit(&spa_namespace_lock); - txg_wait_synced(spa_get_dsl(spa), 0); - mutex_enter(&spa_namespace_lock); - spa_close(spa, FTAG); - } - mutex_exit(&spa_namespace_lock); -} - -/* - * ========================================================================== - * Miscellaneous routines - * ========================================================================== - */ - -/* - * Remove all pools in the system. - */ -void -spa_evict_all(void) -{ - spa_t *spa; - - /* - * Remove all cached state. All pools should be closed now, - * so every spa in the AVL tree should be unreferenced. - */ - mutex_enter(&spa_namespace_lock); - while ((spa = spa_next(NULL)) != NULL) { - /* - * Stop async tasks. The async thread may need to detach - * a device that's been replaced, which requires grabbing - * spa_namespace_lock, so we must drop it here. - */ - spa_open_ref(spa, FTAG); - mutex_exit(&spa_namespace_lock); - spa_async_suspend(spa); - mutex_enter(&spa_namespace_lock); - spa_close(spa, FTAG); - - if (spa->spa_state != POOL_STATE_UNINITIALIZED) { - spa_unload(spa); - spa_deactivate(spa); - } - spa_remove(spa); - } - mutex_exit(&spa_namespace_lock); -} - -vdev_t * -spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) -{ - vdev_t *vd; - int i; - - if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) - return (vd); - - if (aux) { - for (i = 0; i < spa->spa_l2cache.sav_count; i++) { - vd = spa->spa_l2cache.sav_vdevs[i]; - if (vd->vdev_guid == guid) - return (vd); - } - - for (i = 0; i < spa->spa_spares.sav_count; i++) { - vd = spa->spa_spares.sav_vdevs[i]; - if (vd->vdev_guid == guid) - return (vd); - } - } - - return (NULL); -} - -void -spa_upgrade(spa_t *spa, uint64_t version) -{ - ASSERT(spa_writeable(spa)); - - spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); - - /* - * This should only be called for a non-faulted pool, and since a - * future version would result in an unopenable pool, this shouldn't be - * possible. - */ - ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version)); - ASSERT3U(version, >=, spa->spa_uberblock.ub_version); - - spa->spa_uberblock.ub_version = version; - vdev_config_dirty(spa->spa_root_vdev); - - spa_config_exit(spa, SCL_ALL, FTAG); - - txg_wait_synced(spa_get_dsl(spa), 0); -} - -boolean_t -spa_has_spare(spa_t *spa, uint64_t guid) -{ - int i; - uint64_t spareguid; - spa_aux_vdev_t *sav = &spa->spa_spares; - - for (i = 0; i < sav->sav_count; i++) - if (sav->sav_vdevs[i]->vdev_guid == guid) - return (B_TRUE); - - for (i = 0; i < sav->sav_npending; i++) { - if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, - &spareguid) == 0 && spareguid == guid) - return (B_TRUE); - } - - return (B_FALSE); -} - -/* - * Check if a pool has an active shared spare device. - * Note: reference count of an active spare is 2, as a spare and as a replace - */ -static boolean_t -spa_has_active_shared_spare(spa_t *spa) -{ - int i, refcnt; - uint64_t pool; - spa_aux_vdev_t *sav = &spa->spa_spares; - - for (i = 0; i < sav->sav_count; i++) { - if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, - &refcnt) && pool != 0ULL && pool == spa_guid(spa) && - refcnt > 2) - return (B_TRUE); - } - - return (B_FALSE); -} - -static sysevent_t * -spa_event_create(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl, const char *name) -{ - sysevent_t *ev = NULL; -#ifdef _KERNEL - nvlist_t *resource; - - resource = zfs_event_create(spa, vd, FM_SYSEVENT_CLASS, name, hist_nvl); - if (resource) { - ev = kmem_alloc(sizeof (sysevent_t), KM_SLEEP); - ev->resource = resource; - } -#endif - return (ev); -} - -static void -spa_event_post(sysevent_t *ev) -{ -#ifdef _KERNEL - if (ev) { - zfs_zevent_post(ev->resource, NULL, zfs_zevent_post_cb); - kmem_free(ev, sizeof (*ev)); - } -#endif -} - -/* - * Post a zevent corresponding to the given sysevent. The 'name' must be one - * of the event definitions in sys/sysevent/eventdefs.h. The payload will be - * filled in from the spa and (optionally) the vdev. This doesn't do anything - * in the userland libzpool, as we don't want consumers to misinterpret ztest - * or zdb as real changes. - */ -void -spa_event_notify(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl, const char *name) -{ - spa_event_post(spa_event_create(spa, vd, hist_nvl, name)); -} - -#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); -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 - -#if defined(_KERNEL) && defined(HAVE_SPL) -module_param(spa_load_verify_maxinflight, int, 0644); -MODULE_PARM_DESC(spa_load_verify_maxinflight, - "Max concurrent traversal I/Os while verifying pool during import -X"); - -module_param(spa_load_verify_metadata, int, 0644); -MODULE_PARM_DESC(spa_load_verify_metadata, - "Set to traverse metadata on pool import"); - -module_param(spa_load_verify_data, int, 0644); -MODULE_PARM_DESC(spa_load_verify_data, - "Set to traverse data on pool import"); - -/* CSTYLED */ -module_param(zio_taskq_batch_pct, uint, 0444); -MODULE_PARM_DESC(zio_taskq_batch_pct, - "Percentage of CPUs to run an IO worker thread"); - -#endif