5016 lines
141 KiB
C
5016 lines
141 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2011, 2020 by Delphix. All rights reserved.
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* Copyright (c) 2014, Joyent, Inc. All rights reserved.
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* Copyright (c) 2014 RackTop Systems.
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* Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
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* Copyright (c) 2016 Actifio, Inc. All rights reserved.
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* Copyright 2016, OmniTI Computer Consulting, Inc. All rights reserved.
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* Copyright 2017 Nexenta Systems, Inc.
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* Copyright (c) 2019, Klara Inc.
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* Copyright (c) 2019, Allan Jude
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* Copyright (c) 2020 The FreeBSD Foundation [1]
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*
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* [1] Portions of this software were developed by Allan Jude
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* under sponsorship from the FreeBSD Foundation.
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*/
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#include <sys/dmu_objset.h>
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#include <sys/dsl_dataset.h>
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#include <sys/dsl_dir.h>
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#include <sys/dsl_prop.h>
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#include <sys/dsl_synctask.h>
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#include <sys/dmu_traverse.h>
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#include <sys/dmu_impl.h>
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#include <sys/dmu_tx.h>
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#include <sys/arc.h>
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#include <sys/zio.h>
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#include <sys/zap.h>
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#include <sys/zfeature.h>
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#include <sys/unique.h>
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#include <sys/zfs_context.h>
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#include <sys/zfs_ioctl.h>
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#include <sys/spa.h>
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#include <sys/spa_impl.h>
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#include <sys/vdev.h>
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#include <sys/zfs_znode.h>
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#include <sys/zfs_onexit.h>
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#include <sys/zvol.h>
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#include <sys/dsl_scan.h>
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#include <sys/dsl_deadlist.h>
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#include <sys/dsl_destroy.h>
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#include <sys/dsl_userhold.h>
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#include <sys/dsl_bookmark.h>
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#include <sys/policy.h>
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#include <sys/dmu_send.h>
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#include <sys/dmu_recv.h>
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#include <sys/zio_compress.h>
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#include <zfs_fletcher.h>
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#include <sys/zio_checksum.h>
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/*
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* The SPA supports block sizes up to 16MB. However, very large blocks
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* can have an impact on i/o latency (e.g. tying up a spinning disk for
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* ~300ms), and also potentially on the memory allocator. Therefore,
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* we did not allow the recordsize to be set larger than zfs_max_recordsize
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* (former default: 1MB). Larger blocks could be created by changing this
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* tunable, and pools with larger blocks could always be imported and used,
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* regardless of this setting.
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*
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* We do, however, still limit it by default to 1M on x86_32, because Linux's
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* 3/1 memory split doesn't leave much room for 16M chunks.
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*/
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#ifdef _ILP32
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uint_t zfs_max_recordsize = 1 * 1024 * 1024;
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#else
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uint_t zfs_max_recordsize = 16 * 1024 * 1024;
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#endif
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static int zfs_allow_redacted_dataset_mount = 0;
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int zfs_snapshot_history_enabled = 1;
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#define SWITCH64(x, y) \
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{ \
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uint64_t __tmp = (x); \
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(x) = (y); \
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(y) = __tmp; \
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}
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#define DS_REF_MAX (1ULL << 62)
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static void dsl_dataset_set_remap_deadlist_object(dsl_dataset_t *ds,
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uint64_t obj, dmu_tx_t *tx);
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static void dsl_dataset_unset_remap_deadlist_object(dsl_dataset_t *ds,
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dmu_tx_t *tx);
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static void unload_zfeature(dsl_dataset_t *ds, spa_feature_t f);
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extern uint_t spa_asize_inflation;
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static zil_header_t zero_zil;
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/*
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* Figure out how much of this delta should be propagated to the dsl_dir
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* layer. If there's a refreservation, that space has already been
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* partially accounted for in our ancestors.
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*/
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static int64_t
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parent_delta(dsl_dataset_t *ds, int64_t delta)
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{
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dsl_dataset_phys_t *ds_phys;
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uint64_t old_bytes, new_bytes;
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if (ds->ds_reserved == 0)
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return (delta);
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ds_phys = dsl_dataset_phys(ds);
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old_bytes = MAX(ds_phys->ds_unique_bytes, ds->ds_reserved);
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new_bytes = MAX(ds_phys->ds_unique_bytes + delta, ds->ds_reserved);
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ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta));
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return (new_bytes - old_bytes);
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}
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void
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dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx)
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{
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spa_t *spa = dmu_tx_pool(tx)->dp_spa;
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int used = bp_get_dsize_sync(spa, bp);
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int compressed = BP_GET_PSIZE(bp);
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int uncompressed = BP_GET_UCSIZE(bp);
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int64_t delta;
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spa_feature_t f;
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dprintf_bp(bp, "ds=%p", ds);
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ASSERT(dmu_tx_is_syncing(tx));
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/* It could have been compressed away to nothing */
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if (BP_IS_HOLE(bp) || BP_IS_REDACTED(bp))
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return;
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ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE);
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ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp)));
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if (ds == NULL) {
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dsl_pool_mos_diduse_space(tx->tx_pool,
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used, compressed, uncompressed);
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return;
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}
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ASSERT3U(bp->blk_birth, >, dsl_dataset_phys(ds)->ds_prev_snap_txg);
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dmu_buf_will_dirty(ds->ds_dbuf, tx);
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mutex_enter(&ds->ds_lock);
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delta = parent_delta(ds, used);
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dsl_dataset_phys(ds)->ds_referenced_bytes += used;
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dsl_dataset_phys(ds)->ds_compressed_bytes += compressed;
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dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed;
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dsl_dataset_phys(ds)->ds_unique_bytes += used;
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if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) {
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ds->ds_feature_activation[SPA_FEATURE_LARGE_BLOCKS] =
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(void *)B_TRUE;
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}
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f = zio_checksum_to_feature(BP_GET_CHECKSUM(bp));
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if (f != SPA_FEATURE_NONE) {
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ASSERT3S(spa_feature_table[f].fi_type, ==,
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ZFEATURE_TYPE_BOOLEAN);
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ds->ds_feature_activation[f] = (void *)B_TRUE;
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}
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f = zio_compress_to_feature(BP_GET_COMPRESS(bp));
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if (f != SPA_FEATURE_NONE) {
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ASSERT3S(spa_feature_table[f].fi_type, ==,
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ZFEATURE_TYPE_BOOLEAN);
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ds->ds_feature_activation[f] = (void *)B_TRUE;
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}
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/*
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* Track block for livelist, but ignore embedded blocks because
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* they do not need to be freed.
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*/
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if (dsl_deadlist_is_open(&ds->ds_dir->dd_livelist) &&
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bp->blk_birth > ds->ds_dir->dd_origin_txg &&
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!(BP_IS_EMBEDDED(bp))) {
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ASSERT(dsl_dir_is_clone(ds->ds_dir));
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ASSERT(spa_feature_is_enabled(spa,
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SPA_FEATURE_LIVELIST));
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bplist_append(&ds->ds_dir->dd_pending_allocs, bp);
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}
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mutex_exit(&ds->ds_lock);
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dsl_dir_diduse_transfer_space(ds->ds_dir, delta,
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compressed, uncompressed, used,
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DD_USED_REFRSRV, DD_USED_HEAD, tx);
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}
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/*
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* Called when the specified segment has been remapped, and is thus no
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* longer referenced in the head dataset. The vdev must be indirect.
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*
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* If the segment is referenced by a snapshot, put it on the remap deadlist.
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* Otherwise, add this segment to the obsolete spacemap.
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*/
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void
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dsl_dataset_block_remapped(dsl_dataset_t *ds, uint64_t vdev, uint64_t offset,
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uint64_t size, uint64_t birth, dmu_tx_t *tx)
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{
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spa_t *spa = ds->ds_dir->dd_pool->dp_spa;
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ASSERT(dmu_tx_is_syncing(tx));
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ASSERT(birth <= tx->tx_txg);
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ASSERT(!ds->ds_is_snapshot);
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if (birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) {
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spa_vdev_indirect_mark_obsolete(spa, vdev, offset, size, tx);
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} else {
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blkptr_t fakebp;
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dva_t *dva = &fakebp.blk_dva[0];
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ASSERT(ds != NULL);
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mutex_enter(&ds->ds_remap_deadlist_lock);
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if (!dsl_dataset_remap_deadlist_exists(ds)) {
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dsl_dataset_create_remap_deadlist(ds, tx);
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}
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mutex_exit(&ds->ds_remap_deadlist_lock);
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BP_ZERO(&fakebp);
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fakebp.blk_birth = birth;
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DVA_SET_VDEV(dva, vdev);
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DVA_SET_OFFSET(dva, offset);
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DVA_SET_ASIZE(dva, size);
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dsl_deadlist_insert(&ds->ds_remap_deadlist, &fakebp, B_FALSE,
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tx);
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}
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}
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int
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dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx,
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boolean_t async)
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{
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spa_t *spa = dmu_tx_pool(tx)->dp_spa;
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int used = bp_get_dsize_sync(spa, bp);
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int compressed = BP_GET_PSIZE(bp);
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int uncompressed = BP_GET_UCSIZE(bp);
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if (BP_IS_HOLE(bp) || BP_IS_REDACTED(bp))
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return (0);
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ASSERT(dmu_tx_is_syncing(tx));
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ASSERT(bp->blk_birth <= tx->tx_txg);
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if (ds == NULL) {
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dsl_free(tx->tx_pool, tx->tx_txg, bp);
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dsl_pool_mos_diduse_space(tx->tx_pool,
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-used, -compressed, -uncompressed);
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return (used);
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}
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ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool);
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ASSERT(!ds->ds_is_snapshot);
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dmu_buf_will_dirty(ds->ds_dbuf, tx);
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/*
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* Track block for livelist, but ignore embedded blocks because
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* they do not need to be freed.
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*/
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if (dsl_deadlist_is_open(&ds->ds_dir->dd_livelist) &&
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bp->blk_birth > ds->ds_dir->dd_origin_txg &&
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!(BP_IS_EMBEDDED(bp))) {
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ASSERT(dsl_dir_is_clone(ds->ds_dir));
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ASSERT(spa_feature_is_enabled(spa,
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SPA_FEATURE_LIVELIST));
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bplist_append(&ds->ds_dir->dd_pending_frees, bp);
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}
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if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) {
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int64_t delta;
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dprintf_bp(bp, "freeing ds=%llu", (u_longlong_t)ds->ds_object);
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dsl_free(tx->tx_pool, tx->tx_txg, bp);
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mutex_enter(&ds->ds_lock);
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ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used ||
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!DS_UNIQUE_IS_ACCURATE(ds));
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delta = parent_delta(ds, -used);
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dsl_dataset_phys(ds)->ds_unique_bytes -= used;
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mutex_exit(&ds->ds_lock);
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dsl_dir_diduse_transfer_space(ds->ds_dir,
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delta, -compressed, -uncompressed, -used,
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DD_USED_REFRSRV, DD_USED_HEAD, tx);
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} else {
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dprintf_bp(bp, "putting on dead list: %s", "");
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if (async) {
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/*
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* We are here as part of zio's write done callback,
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* which means we're a zio interrupt thread. We can't
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* call dsl_deadlist_insert() now because it may block
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* waiting for I/O. Instead, put bp on the deferred
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* queue and let dsl_pool_sync() finish the job.
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*/
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bplist_append(&ds->ds_pending_deadlist, bp);
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} else {
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dsl_deadlist_insert(&ds->ds_deadlist, bp, B_FALSE, tx);
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}
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ASSERT3U(ds->ds_prev->ds_object, ==,
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dsl_dataset_phys(ds)->ds_prev_snap_obj);
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ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0);
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/* if (bp->blk_birth > prev prev snap txg) prev unique += bs */
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if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj ==
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ds->ds_object && bp->blk_birth >
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dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) {
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dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
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mutex_enter(&ds->ds_prev->ds_lock);
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dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used;
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mutex_exit(&ds->ds_prev->ds_lock);
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}
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if (bp->blk_birth > ds->ds_dir->dd_origin_txg) {
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dsl_dir_transfer_space(ds->ds_dir, used,
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DD_USED_HEAD, DD_USED_SNAP, tx);
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}
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}
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dsl_bookmark_block_killed(ds, bp, tx);
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mutex_enter(&ds->ds_lock);
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ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used);
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dsl_dataset_phys(ds)->ds_referenced_bytes -= used;
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ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed);
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dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed;
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ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed);
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dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed;
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mutex_exit(&ds->ds_lock);
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return (used);
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}
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struct feature_type_uint64_array_arg {
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uint64_t length;
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uint64_t *array;
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};
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static void
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unload_zfeature(dsl_dataset_t *ds, spa_feature_t f)
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{
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switch (spa_feature_table[f].fi_type) {
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case ZFEATURE_TYPE_BOOLEAN:
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break;
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case ZFEATURE_TYPE_UINT64_ARRAY:
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{
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struct feature_type_uint64_array_arg *ftuaa = ds->ds_feature[f];
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kmem_free(ftuaa->array, ftuaa->length * sizeof (uint64_t));
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kmem_free(ftuaa, sizeof (*ftuaa));
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break;
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}
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default:
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panic("Invalid zfeature type %d", spa_feature_table[f].fi_type);
|
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}
|
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}
|
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|
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static int
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load_zfeature(objset_t *mos, dsl_dataset_t *ds, spa_feature_t f)
|
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{
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int err = 0;
|
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switch (spa_feature_table[f].fi_type) {
|
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case ZFEATURE_TYPE_BOOLEAN:
|
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err = zap_contains(mos, ds->ds_object,
|
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spa_feature_table[f].fi_guid);
|
|
if (err == 0) {
|
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ds->ds_feature[f] = (void *)B_TRUE;
|
|
} else {
|
|
ASSERT3U(err, ==, ENOENT);
|
|
err = 0;
|
|
}
|
|
break;
|
|
case ZFEATURE_TYPE_UINT64_ARRAY:
|
|
{
|
|
uint64_t int_size, num_int;
|
|
uint64_t *data;
|
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err = zap_length(mos, ds->ds_object,
|
|
spa_feature_table[f].fi_guid, &int_size, &num_int);
|
|
if (err != 0) {
|
|
ASSERT3U(err, ==, ENOENT);
|
|
err = 0;
|
|
break;
|
|
}
|
|
ASSERT3U(int_size, ==, sizeof (uint64_t));
|
|
data = kmem_alloc(int_size * num_int, KM_SLEEP);
|
|
VERIFY0(zap_lookup(mos, ds->ds_object,
|
|
spa_feature_table[f].fi_guid, int_size, num_int, data));
|
|
struct feature_type_uint64_array_arg *ftuaa =
|
|
kmem_alloc(sizeof (*ftuaa), KM_SLEEP);
|
|
ftuaa->length = num_int;
|
|
ftuaa->array = data;
|
|
ds->ds_feature[f] = ftuaa;
|
|
break;
|
|
}
|
|
default:
|
|
panic("Invalid zfeature type %d", spa_feature_table[f].fi_type);
|
|
}
|
|
return (err);
|
|
}
|
|
|
|
/*
|
|
* We have to release the fsid synchronously or we risk that a subsequent
|
|
* mount of the same dataset will fail to unique_insert the fsid. This
|
|
* failure would manifest itself as the fsid of this dataset changing
|
|
* between mounts which makes NFS clients quite unhappy.
|
|
*/
|
|
static void
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|
dsl_dataset_evict_sync(void *dbu)
|
|
{
|
|
dsl_dataset_t *ds = dbu;
|
|
|
|
ASSERT(ds->ds_owner == NULL);
|
|
|
|
unique_remove(ds->ds_fsid_guid);
|
|
}
|
|
|
|
static void
|
|
dsl_dataset_evict_async(void *dbu)
|
|
{
|
|
dsl_dataset_t *ds = dbu;
|
|
|
|
ASSERT(ds->ds_owner == NULL);
|
|
|
|
ds->ds_dbuf = NULL;
|
|
|
|
if (ds->ds_objset != NULL)
|
|
dmu_objset_evict(ds->ds_objset);
|
|
|
|
if (ds->ds_prev) {
|
|
dsl_dataset_rele(ds->ds_prev, ds);
|
|
ds->ds_prev = NULL;
|
|
}
|
|
|
|
dsl_bookmark_fini_ds(ds);
|
|
|
|
bplist_destroy(&ds->ds_pending_deadlist);
|
|
if (dsl_deadlist_is_open(&ds->ds_deadlist))
|
|
dsl_deadlist_close(&ds->ds_deadlist);
|
|
if (dsl_deadlist_is_open(&ds->ds_remap_deadlist))
|
|
dsl_deadlist_close(&ds->ds_remap_deadlist);
|
|
if (ds->ds_dir)
|
|
dsl_dir_async_rele(ds->ds_dir, ds);
|
|
|
|
ASSERT(!list_link_active(&ds->ds_synced_link));
|
|
|
|
for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
|
|
if (dsl_dataset_feature_is_active(ds, f))
|
|
unload_zfeature(ds, f);
|
|
}
|
|
|
|
list_destroy(&ds->ds_prop_cbs);
|
|
mutex_destroy(&ds->ds_lock);
|
|
mutex_destroy(&ds->ds_opening_lock);
|
|
mutex_destroy(&ds->ds_sendstream_lock);
|
|
mutex_destroy(&ds->ds_remap_deadlist_lock);
|
|
zfs_refcount_destroy(&ds->ds_longholds);
|
|
rrw_destroy(&ds->ds_bp_rwlock);
|
|
|
|
kmem_free(ds, sizeof (dsl_dataset_t));
|
|
}
|
|
|
|
int
|
|
dsl_dataset_get_snapname(dsl_dataset_t *ds)
|
|
{
|
|
dsl_dataset_phys_t *headphys;
|
|
int err;
|
|
dmu_buf_t *headdbuf;
|
|
dsl_pool_t *dp = ds->ds_dir->dd_pool;
|
|
objset_t *mos = dp->dp_meta_objset;
|
|
|
|
if (ds->ds_snapname[0])
|
|
return (0);
|
|
if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0)
|
|
return (0);
|
|
|
|
err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj,
|
|
FTAG, &headdbuf);
|
|
if (err != 0)
|
|
return (err);
|
|
headphys = headdbuf->db_data;
|
|
err = zap_value_search(dp->dp_meta_objset,
|
|
headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname);
|
|
if (err != 0 && zfs_recover == B_TRUE) {
|
|
err = 0;
|
|
(void) snprintf(ds->ds_snapname, sizeof (ds->ds_snapname),
|
|
"SNAPOBJ=%llu-ERR=%d",
|
|
(unsigned long long)ds->ds_object, err);
|
|
}
|
|
dmu_buf_rele(headdbuf, FTAG);
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value)
|
|
{
|
|
objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
|
|
uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
|
|
matchtype_t mt = 0;
|
|
int err;
|
|
|
|
if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET)
|
|
mt = MT_NORMALIZE;
|
|
|
|
err = zap_lookup_norm(mos, snapobj, name, 8, 1,
|
|
value, mt, NULL, 0, NULL);
|
|
if (err == ENOTSUP && (mt & MT_NORMALIZE))
|
|
err = zap_lookup(mos, snapobj, name, 8, 1, value);
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx,
|
|
boolean_t adj_cnt)
|
|
{
|
|
objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
|
|
uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
|
|
matchtype_t mt = 0;
|
|
int err;
|
|
|
|
dsl_dir_snap_cmtime_update(ds->ds_dir, tx);
|
|
|
|
if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET)
|
|
mt = MT_NORMALIZE;
|
|
|
|
err = zap_remove_norm(mos, snapobj, name, mt, tx);
|
|
if (err == ENOTSUP && (mt & MT_NORMALIZE))
|
|
err = zap_remove(mos, snapobj, name, tx);
|
|
|
|
if (err == 0 && adj_cnt)
|
|
dsl_fs_ss_count_adjust(ds->ds_dir, -1,
|
|
DD_FIELD_SNAPSHOT_COUNT, tx);
|
|
|
|
return (err);
|
|
}
|
|
|
|
boolean_t
|
|
dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, const void *tag)
|
|
{
|
|
dmu_buf_t *dbuf = ds->ds_dbuf;
|
|
boolean_t result = B_FALSE;
|
|
|
|
if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset,
|
|
ds->ds_object, DMU_BONUS_BLKID, tag)) {
|
|
|
|
if (ds == dmu_buf_get_user(dbuf))
|
|
result = B_TRUE;
|
|
else
|
|
dmu_buf_rele(dbuf, tag);
|
|
}
|
|
|
|
return (result);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, const void *tag,
|
|
dsl_dataset_t **dsp)
|
|
{
|
|
objset_t *mos = dp->dp_meta_objset;
|
|
dmu_buf_t *dbuf;
|
|
dsl_dataset_t *ds;
|
|
int err;
|
|
dmu_object_info_t doi;
|
|
|
|
ASSERT(dsl_pool_config_held(dp));
|
|
|
|
err = dmu_bonus_hold(mos, dsobj, tag, &dbuf);
|
|
if (err != 0)
|
|
return (err);
|
|
|
|
/* Make sure dsobj has the correct object type. */
|
|
dmu_object_info_from_db(dbuf, &doi);
|
|
if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) {
|
|
dmu_buf_rele(dbuf, tag);
|
|
return (SET_ERROR(EINVAL));
|
|
}
|
|
|
|
ds = dmu_buf_get_user(dbuf);
|
|
if (ds == NULL) {
|
|
dsl_dataset_t *winner = NULL;
|
|
|
|
ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP);
|
|
ds->ds_dbuf = dbuf;
|
|
ds->ds_object = dsobj;
|
|
ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0;
|
|
list_link_init(&ds->ds_synced_link);
|
|
|
|
err = dsl_dir_hold_obj(dp, dsl_dataset_phys(ds)->ds_dir_obj,
|
|
NULL, ds, &ds->ds_dir);
|
|
if (err != 0) {
|
|
kmem_free(ds, sizeof (dsl_dataset_t));
|
|
dmu_buf_rele(dbuf, tag);
|
|
return (err);
|
|
}
|
|
|
|
mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
mutex_init(&ds->ds_remap_deadlist_lock,
|
|
NULL, MUTEX_DEFAULT, NULL);
|
|
rrw_init(&ds->ds_bp_rwlock, B_FALSE);
|
|
zfs_refcount_create(&ds->ds_longholds);
|
|
|
|
bplist_create(&ds->ds_pending_deadlist);
|
|
|
|
list_create(&ds->ds_sendstreams, sizeof (dmu_sendstatus_t),
|
|
offsetof(dmu_sendstatus_t, dss_link));
|
|
|
|
list_create(&ds->ds_prop_cbs, sizeof (dsl_prop_cb_record_t),
|
|
offsetof(dsl_prop_cb_record_t, cbr_ds_node));
|
|
|
|
if (doi.doi_type == DMU_OTN_ZAP_METADATA) {
|
|
spa_feature_t f;
|
|
|
|
for (f = 0; f < SPA_FEATURES; f++) {
|
|
if (!(spa_feature_table[f].fi_flags &
|
|
ZFEATURE_FLAG_PER_DATASET))
|
|
continue;
|
|
err = load_zfeature(mos, ds, f);
|
|
}
|
|
}
|
|
|
|
if (!ds->ds_is_snapshot) {
|
|
ds->ds_snapname[0] = '\0';
|
|
if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) {
|
|
err = dsl_dataset_hold_obj(dp,
|
|
dsl_dataset_phys(ds)->ds_prev_snap_obj,
|
|
ds, &ds->ds_prev);
|
|
}
|
|
if (err != 0)
|
|
goto after_dsl_bookmark_fini;
|
|
err = dsl_bookmark_init_ds(ds);
|
|
} else {
|
|
if (zfs_flags & ZFS_DEBUG_SNAPNAMES)
|
|
err = dsl_dataset_get_snapname(ds);
|
|
if (err == 0 &&
|
|
dsl_dataset_phys(ds)->ds_userrefs_obj != 0) {
|
|
err = zap_count(
|
|
ds->ds_dir->dd_pool->dp_meta_objset,
|
|
dsl_dataset_phys(ds)->ds_userrefs_obj,
|
|
&ds->ds_userrefs);
|
|
}
|
|
}
|
|
|
|
if (err == 0 && !ds->ds_is_snapshot) {
|
|
err = dsl_prop_get_int_ds(ds,
|
|
zfs_prop_to_name(ZFS_PROP_REFRESERVATION),
|
|
&ds->ds_reserved);
|
|
if (err == 0) {
|
|
err = dsl_prop_get_int_ds(ds,
|
|
zfs_prop_to_name(ZFS_PROP_REFQUOTA),
|
|
&ds->ds_quota);
|
|
}
|
|
} else {
|
|
ds->ds_reserved = ds->ds_quota = 0;
|
|
}
|
|
|
|
if (err == 0 && ds->ds_dir->dd_crypto_obj != 0 &&
|
|
ds->ds_is_snapshot &&
|
|
zap_contains(mos, dsobj, DS_FIELD_IVSET_GUID) != 0) {
|
|
dp->dp_spa->spa_errata =
|
|
ZPOOL_ERRATA_ZOL_8308_ENCRYPTION;
|
|
}
|
|
|
|
dsl_deadlist_open(&ds->ds_deadlist,
|
|
mos, dsl_dataset_phys(ds)->ds_deadlist_obj);
|
|
uint64_t remap_deadlist_obj =
|
|
dsl_dataset_get_remap_deadlist_object(ds);
|
|
if (remap_deadlist_obj != 0) {
|
|
dsl_deadlist_open(&ds->ds_remap_deadlist, mos,
|
|
remap_deadlist_obj);
|
|
}
|
|
|
|
dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict_sync,
|
|
dsl_dataset_evict_async, &ds->ds_dbuf);
|
|
if (err == 0)
|
|
winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu);
|
|
|
|
if (err != 0 || winner != NULL) {
|
|
dsl_deadlist_close(&ds->ds_deadlist);
|
|
if (dsl_deadlist_is_open(&ds->ds_remap_deadlist))
|
|
dsl_deadlist_close(&ds->ds_remap_deadlist);
|
|
dsl_bookmark_fini_ds(ds);
|
|
after_dsl_bookmark_fini:
|
|
if (ds->ds_prev)
|
|
dsl_dataset_rele(ds->ds_prev, ds);
|
|
dsl_dir_rele(ds->ds_dir, ds);
|
|
for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
|
|
if (dsl_dataset_feature_is_active(ds, f))
|
|
unload_zfeature(ds, f);
|
|
}
|
|
|
|
list_destroy(&ds->ds_prop_cbs);
|
|
list_destroy(&ds->ds_sendstreams);
|
|
bplist_destroy(&ds->ds_pending_deadlist);
|
|
mutex_destroy(&ds->ds_lock);
|
|
mutex_destroy(&ds->ds_opening_lock);
|
|
mutex_destroy(&ds->ds_sendstream_lock);
|
|
mutex_destroy(&ds->ds_remap_deadlist_lock);
|
|
zfs_refcount_destroy(&ds->ds_longholds);
|
|
rrw_destroy(&ds->ds_bp_rwlock);
|
|
kmem_free(ds, sizeof (dsl_dataset_t));
|
|
if (err != 0) {
|
|
dmu_buf_rele(dbuf, tag);
|
|
return (err);
|
|
}
|
|
ds = winner;
|
|
} else {
|
|
ds->ds_fsid_guid =
|
|
unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid);
|
|
if (ds->ds_fsid_guid !=
|
|
dsl_dataset_phys(ds)->ds_fsid_guid) {
|
|
zfs_dbgmsg("ds_fsid_guid changed from "
|
|
"%llx to %llx for pool %s dataset id %llu",
|
|
(long long)
|
|
dsl_dataset_phys(ds)->ds_fsid_guid,
|
|
(long long)ds->ds_fsid_guid,
|
|
spa_name(dp->dp_spa),
|
|
(u_longlong_t)dsobj);
|
|
}
|
|
}
|
|
}
|
|
|
|
ASSERT3P(ds->ds_dbuf, ==, dbuf);
|
|
ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data);
|
|
ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 ||
|
|
spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN ||
|
|
dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap);
|
|
*dsp = ds;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_create_key_mapping(dsl_dataset_t *ds)
|
|
{
|
|
dsl_dir_t *dd = ds->ds_dir;
|
|
|
|
if (dd->dd_crypto_obj == 0)
|
|
return (0);
|
|
|
|
return (spa_keystore_create_mapping(dd->dd_pool->dp_spa,
|
|
ds, ds, &ds->ds_key_mapping));
|
|
}
|
|
|
|
int
|
|
dsl_dataset_hold_obj_flags(dsl_pool_t *dp, uint64_t dsobj,
|
|
ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp)
|
|
{
|
|
int err;
|
|
|
|
err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp);
|
|
if (err != 0)
|
|
return (err);
|
|
|
|
ASSERT3P(*dsp, !=, NULL);
|
|
|
|
if (flags & DS_HOLD_FLAG_DECRYPT) {
|
|
err = dsl_dataset_create_key_mapping(*dsp);
|
|
if (err != 0)
|
|
dsl_dataset_rele(*dsp, tag);
|
|
}
|
|
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_hold_flags(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags,
|
|
const void *tag, dsl_dataset_t **dsp)
|
|
{
|
|
dsl_dir_t *dd;
|
|
const char *snapname;
|
|
uint64_t obj;
|
|
int err = 0;
|
|
dsl_dataset_t *ds;
|
|
|
|
err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname);
|
|
if (err != 0)
|
|
return (err);
|
|
|
|
ASSERT(dsl_pool_config_held(dp));
|
|
obj = dsl_dir_phys(dd)->dd_head_dataset_obj;
|
|
if (obj != 0)
|
|
err = dsl_dataset_hold_obj_flags(dp, obj, flags, tag, &ds);
|
|
else
|
|
err = SET_ERROR(ENOENT);
|
|
|
|
/* we may be looking for a snapshot */
|
|
if (err == 0 && snapname != NULL) {
|
|
dsl_dataset_t *snap_ds;
|
|
|
|
if (*snapname++ != '@') {
|
|
dsl_dataset_rele_flags(ds, flags, tag);
|
|
dsl_dir_rele(dd, FTAG);
|
|
return (SET_ERROR(ENOENT));
|
|
}
|
|
|
|
dprintf("looking for snapshot '%s'\n", snapname);
|
|
err = dsl_dataset_snap_lookup(ds, snapname, &obj);
|
|
if (err == 0) {
|
|
err = dsl_dataset_hold_obj_flags(dp, obj, flags, tag,
|
|
&snap_ds);
|
|
}
|
|
dsl_dataset_rele_flags(ds, flags, tag);
|
|
|
|
if (err == 0) {
|
|
mutex_enter(&snap_ds->ds_lock);
|
|
if (snap_ds->ds_snapname[0] == 0)
|
|
(void) strlcpy(snap_ds->ds_snapname, snapname,
|
|
sizeof (snap_ds->ds_snapname));
|
|
mutex_exit(&snap_ds->ds_lock);
|
|
ds = snap_ds;
|
|
}
|
|
}
|
|
if (err == 0)
|
|
*dsp = ds;
|
|
dsl_dir_rele(dd, FTAG);
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_hold(dsl_pool_t *dp, const char *name, const void *tag,
|
|
dsl_dataset_t **dsp)
|
|
{
|
|
return (dsl_dataset_hold_flags(dp, name, 0, tag, dsp));
|
|
}
|
|
|
|
static int
|
|
dsl_dataset_own_obj_impl(dsl_pool_t *dp, uint64_t dsobj, ds_hold_flags_t flags,
|
|
const void *tag, boolean_t override, dsl_dataset_t **dsp)
|
|
{
|
|
int err = dsl_dataset_hold_obj_flags(dp, dsobj, flags, tag, dsp);
|
|
if (err != 0)
|
|
return (err);
|
|
if (!dsl_dataset_tryown(*dsp, tag, override)) {
|
|
dsl_dataset_rele_flags(*dsp, flags, tag);
|
|
*dsp = NULL;
|
|
return (SET_ERROR(EBUSY));
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
|
|
int
|
|
dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, ds_hold_flags_t flags,
|
|
const void *tag, dsl_dataset_t **dsp)
|
|
{
|
|
return (dsl_dataset_own_obj_impl(dp, dsobj, flags, tag, B_FALSE, dsp));
|
|
}
|
|
|
|
int
|
|
dsl_dataset_own_obj_force(dsl_pool_t *dp, uint64_t dsobj,
|
|
ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp)
|
|
{
|
|
return (dsl_dataset_own_obj_impl(dp, dsobj, flags, tag, B_TRUE, dsp));
|
|
}
|
|
|
|
static int
|
|
dsl_dataset_own_impl(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags,
|
|
const void *tag, boolean_t override, dsl_dataset_t **dsp)
|
|
{
|
|
int err = dsl_dataset_hold_flags(dp, name, flags, tag, dsp);
|
|
if (err != 0)
|
|
return (err);
|
|
if (!dsl_dataset_tryown(*dsp, tag, override)) {
|
|
dsl_dataset_rele_flags(*dsp, flags, tag);
|
|
return (SET_ERROR(EBUSY));
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_own_force(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags,
|
|
const void *tag, dsl_dataset_t **dsp)
|
|
{
|
|
return (dsl_dataset_own_impl(dp, name, flags, tag, B_TRUE, dsp));
|
|
}
|
|
|
|
int
|
|
dsl_dataset_own(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags,
|
|
const void *tag, dsl_dataset_t **dsp)
|
|
{
|
|
return (dsl_dataset_own_impl(dp, name, flags, tag, B_FALSE, dsp));
|
|
}
|
|
|
|
/*
|
|
* See the comment above dsl_pool_hold() for details. In summary, a long
|
|
* hold is used to prevent destruction of a dataset while the pool hold
|
|
* is dropped, allowing other concurrent operations (e.g. spa_sync()).
|
|
*
|
|
* The dataset and pool must be held when this function is called. After it
|
|
* is called, the pool hold may be released while the dataset is still held
|
|
* and accessed.
|
|
*/
|
|
void
|
|
dsl_dataset_long_hold(dsl_dataset_t *ds, const void *tag)
|
|
{
|
|
ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
|
|
(void) zfs_refcount_add(&ds->ds_longholds, tag);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_long_rele(dsl_dataset_t *ds, const void *tag)
|
|
{
|
|
(void) zfs_refcount_remove(&ds->ds_longholds, tag);
|
|
}
|
|
|
|
/* Return B_TRUE if there are any long holds on this dataset. */
|
|
boolean_t
|
|
dsl_dataset_long_held(dsl_dataset_t *ds)
|
|
{
|
|
return (!zfs_refcount_is_zero(&ds->ds_longholds));
|
|
}
|
|
|
|
void
|
|
dsl_dataset_name(dsl_dataset_t *ds, char *name)
|
|
{
|
|
if (ds == NULL) {
|
|
(void) strlcpy(name, "mos", ZFS_MAX_DATASET_NAME_LEN);
|
|
} else {
|
|
dsl_dir_name(ds->ds_dir, name);
|
|
VERIFY0(dsl_dataset_get_snapname(ds));
|
|
if (ds->ds_snapname[0]) {
|
|
VERIFY3U(strlcat(name, "@", ZFS_MAX_DATASET_NAME_LEN),
|
|
<, ZFS_MAX_DATASET_NAME_LEN);
|
|
/*
|
|
* We use a "recursive" mutex so that we
|
|
* can call dprintf_ds() with ds_lock held.
|
|
*/
|
|
if (!MUTEX_HELD(&ds->ds_lock)) {
|
|
mutex_enter(&ds->ds_lock);
|
|
VERIFY3U(strlcat(name, ds->ds_snapname,
|
|
ZFS_MAX_DATASET_NAME_LEN), <,
|
|
ZFS_MAX_DATASET_NAME_LEN);
|
|
mutex_exit(&ds->ds_lock);
|
|
} else {
|
|
VERIFY3U(strlcat(name, ds->ds_snapname,
|
|
ZFS_MAX_DATASET_NAME_LEN), <,
|
|
ZFS_MAX_DATASET_NAME_LEN);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
dsl_dataset_namelen(dsl_dataset_t *ds)
|
|
{
|
|
VERIFY0(dsl_dataset_get_snapname(ds));
|
|
mutex_enter(&ds->ds_lock);
|
|
int len = strlen(ds->ds_snapname);
|
|
mutex_exit(&ds->ds_lock);
|
|
/* add '@' if ds is a snap */
|
|
if (len > 0)
|
|
len++;
|
|
len += dsl_dir_namelen(ds->ds_dir);
|
|
return (len);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_rele(dsl_dataset_t *ds, const void *tag)
|
|
{
|
|
dmu_buf_rele(ds->ds_dbuf, tag);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_remove_key_mapping(dsl_dataset_t *ds)
|
|
{
|
|
dsl_dir_t *dd = ds->ds_dir;
|
|
|
|
if (dd == NULL || dd->dd_crypto_obj == 0)
|
|
return;
|
|
|
|
(void) spa_keystore_remove_mapping(dd->dd_pool->dp_spa,
|
|
ds->ds_object, ds);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags,
|
|
const void *tag)
|
|
{
|
|
if (flags & DS_HOLD_FLAG_DECRYPT)
|
|
dsl_dataset_remove_key_mapping(ds);
|
|
|
|
dsl_dataset_rele(ds, tag);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags, const void *tag)
|
|
{
|
|
ASSERT3P(ds->ds_owner, ==, tag);
|
|
ASSERT(ds->ds_dbuf != NULL);
|
|
|
|
mutex_enter(&ds->ds_lock);
|
|
ds->ds_owner = NULL;
|
|
mutex_exit(&ds->ds_lock);
|
|
dsl_dataset_long_rele(ds, tag);
|
|
dsl_dataset_rele_flags(ds, flags, tag);
|
|
}
|
|
|
|
boolean_t
|
|
dsl_dataset_tryown(dsl_dataset_t *ds, const void *tag, boolean_t override)
|
|
{
|
|
boolean_t gotit = FALSE;
|
|
|
|
ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
|
|
mutex_enter(&ds->ds_lock);
|
|
if (ds->ds_owner == NULL && (override || !(DS_IS_INCONSISTENT(ds) ||
|
|
(dsl_dataset_feature_is_active(ds,
|
|
SPA_FEATURE_REDACTED_DATASETS) &&
|
|
!zfs_allow_redacted_dataset_mount)))) {
|
|
ds->ds_owner = tag;
|
|
dsl_dataset_long_hold(ds, tag);
|
|
gotit = TRUE;
|
|
}
|
|
mutex_exit(&ds->ds_lock);
|
|
return (gotit);
|
|
}
|
|
|
|
boolean_t
|
|
dsl_dataset_has_owner(dsl_dataset_t *ds)
|
|
{
|
|
boolean_t rv;
|
|
mutex_enter(&ds->ds_lock);
|
|
rv = (ds->ds_owner != NULL);
|
|
mutex_exit(&ds->ds_lock);
|
|
return (rv);
|
|
}
|
|
|
|
static boolean_t
|
|
zfeature_active(spa_feature_t f, void *arg)
|
|
{
|
|
switch (spa_feature_table[f].fi_type) {
|
|
case ZFEATURE_TYPE_BOOLEAN: {
|
|
boolean_t val = (boolean_t)(uintptr_t)arg;
|
|
ASSERT(val == B_FALSE || val == B_TRUE);
|
|
return (val);
|
|
}
|
|
case ZFEATURE_TYPE_UINT64_ARRAY:
|
|
/*
|
|
* In this case, arg is a uint64_t array. The feature is active
|
|
* if the array is non-null.
|
|
*/
|
|
return (arg != NULL);
|
|
default:
|
|
panic("Invalid zfeature type %d", spa_feature_table[f].fi_type);
|
|
return (B_FALSE);
|
|
}
|
|
}
|
|
|
|
boolean_t
|
|
dsl_dataset_feature_is_active(dsl_dataset_t *ds, spa_feature_t f)
|
|
{
|
|
return (zfeature_active(f, ds->ds_feature[f]));
|
|
}
|
|
|
|
/*
|
|
* The buffers passed out by this function are references to internal buffers;
|
|
* they should not be freed by callers of this function, and they should not be
|
|
* used after the dataset has been released.
|
|
*/
|
|
boolean_t
|
|
dsl_dataset_get_uint64_array_feature(dsl_dataset_t *ds, spa_feature_t f,
|
|
uint64_t *outlength, uint64_t **outp)
|
|
{
|
|
VERIFY(spa_feature_table[f].fi_type & ZFEATURE_TYPE_UINT64_ARRAY);
|
|
if (!dsl_dataset_feature_is_active(ds, f)) {
|
|
return (B_FALSE);
|
|
}
|
|
struct feature_type_uint64_array_arg *ftuaa = ds->ds_feature[f];
|
|
*outp = ftuaa->array;
|
|
*outlength = ftuaa->length;
|
|
return (B_TRUE);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, void *arg,
|
|
dmu_tx_t *tx)
|
|
{
|
|
spa_t *spa = dmu_tx_pool(tx)->dp_spa;
|
|
objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset;
|
|
uint64_t zero = 0;
|
|
|
|
VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET);
|
|
|
|
spa_feature_incr(spa, f, tx);
|
|
dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx);
|
|
|
|
switch (spa_feature_table[f].fi_type) {
|
|
case ZFEATURE_TYPE_BOOLEAN:
|
|
ASSERT3S((boolean_t)(uintptr_t)arg, ==, B_TRUE);
|
|
VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid,
|
|
sizeof (zero), 1, &zero, tx));
|
|
break;
|
|
case ZFEATURE_TYPE_UINT64_ARRAY:
|
|
{
|
|
struct feature_type_uint64_array_arg *ftuaa = arg;
|
|
VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid,
|
|
sizeof (uint64_t), ftuaa->length, ftuaa->array, tx));
|
|
break;
|
|
}
|
|
default:
|
|
panic("Invalid zfeature type %d", spa_feature_table[f].fi_type);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dsl_dataset_deactivate_feature_impl(dsl_dataset_t *ds, spa_feature_t f,
|
|
dmu_tx_t *tx)
|
|
{
|
|
spa_t *spa = dmu_tx_pool(tx)->dp_spa;
|
|
objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset;
|
|
uint64_t dsobj = ds->ds_object;
|
|
|
|
VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET);
|
|
|
|
VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx));
|
|
spa_feature_decr(spa, f, tx);
|
|
ds->ds_feature[f] = NULL;
|
|
}
|
|
|
|
void
|
|
dsl_dataset_deactivate_feature(dsl_dataset_t *ds, spa_feature_t f, dmu_tx_t *tx)
|
|
{
|
|
unload_zfeature(ds, f);
|
|
dsl_dataset_deactivate_feature_impl(ds, f, tx);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
|
|
dsl_crypto_params_t *dcp, uint64_t flags, dmu_tx_t *tx)
|
|
{
|
|
dsl_pool_t *dp = dd->dd_pool;
|
|
dmu_buf_t *dbuf;
|
|
dsl_dataset_phys_t *dsphys;
|
|
uint64_t dsobj;
|
|
objset_t *mos = dp->dp_meta_objset;
|
|
|
|
if (origin == NULL)
|
|
origin = dp->dp_origin_snap;
|
|
|
|
ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp);
|
|
ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0);
|
|
ASSERT(dmu_tx_is_syncing(tx));
|
|
ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0);
|
|
|
|
dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0,
|
|
DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx);
|
|
VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf));
|
|
dmu_buf_will_dirty(dbuf, tx);
|
|
dsphys = dbuf->db_data;
|
|
memset(dsphys, 0, sizeof (dsl_dataset_phys_t));
|
|
dsphys->ds_dir_obj = dd->dd_object;
|
|
dsphys->ds_flags = flags;
|
|
dsphys->ds_fsid_guid = unique_create();
|
|
(void) random_get_pseudo_bytes((void*)&dsphys->ds_guid,
|
|
sizeof (dsphys->ds_guid));
|
|
dsphys->ds_snapnames_zapobj =
|
|
zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP,
|
|
DMU_OT_NONE, 0, tx);
|
|
dsphys->ds_creation_time = gethrestime_sec();
|
|
dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg;
|
|
|
|
if (origin == NULL) {
|
|
dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx);
|
|
} else {
|
|
dsl_dataset_t *ohds; /* head of the origin snapshot */
|
|
|
|
dsphys->ds_prev_snap_obj = origin->ds_object;
|
|
dsphys->ds_prev_snap_txg =
|
|
dsl_dataset_phys(origin)->ds_creation_txg;
|
|
dsphys->ds_referenced_bytes =
|
|
dsl_dataset_phys(origin)->ds_referenced_bytes;
|
|
dsphys->ds_compressed_bytes =
|
|
dsl_dataset_phys(origin)->ds_compressed_bytes;
|
|
dsphys->ds_uncompressed_bytes =
|
|
dsl_dataset_phys(origin)->ds_uncompressed_bytes;
|
|
rrw_enter(&origin->ds_bp_rwlock, RW_READER, FTAG);
|
|
dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp;
|
|
rrw_exit(&origin->ds_bp_rwlock, FTAG);
|
|
|
|
/*
|
|
* Inherit flags that describe the dataset's contents
|
|
* (INCONSISTENT) or properties (Case Insensitive).
|
|
*/
|
|
dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags &
|
|
(DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET);
|
|
|
|
for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
|
|
if (zfeature_active(f, origin->ds_feature[f])) {
|
|
dsl_dataset_activate_feature(dsobj, f,
|
|
origin->ds_feature[f], tx);
|
|
}
|
|
}
|
|
|
|
dmu_buf_will_dirty(origin->ds_dbuf, tx);
|
|
dsl_dataset_phys(origin)->ds_num_children++;
|
|
|
|
VERIFY0(dsl_dataset_hold_obj(dp,
|
|
dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj,
|
|
FTAG, &ohds));
|
|
dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist,
|
|
dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx);
|
|
dsl_dataset_rele(ohds, FTAG);
|
|
|
|
if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) {
|
|
if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) {
|
|
dsl_dataset_phys(origin)->ds_next_clones_obj =
|
|
zap_create(mos,
|
|
DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx);
|
|
}
|
|
VERIFY0(zap_add_int(mos,
|
|
dsl_dataset_phys(origin)->ds_next_clones_obj,
|
|
dsobj, tx));
|
|
}
|
|
|
|
dmu_buf_will_dirty(dd->dd_dbuf, tx);
|
|
dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object;
|
|
if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) {
|
|
if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) {
|
|
dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx);
|
|
dsl_dir_phys(origin->ds_dir)->dd_clones =
|
|
zap_create(mos,
|
|
DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx);
|
|
}
|
|
VERIFY0(zap_add_int(mos,
|
|
dsl_dir_phys(origin->ds_dir)->dd_clones,
|
|
dsobj, tx));
|
|
}
|
|
}
|
|
|
|
/* handle encryption */
|
|
dsl_dataset_create_crypt_sync(dsobj, dd, origin, dcp, tx);
|
|
|
|
if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE)
|
|
dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE;
|
|
|
|
dmu_buf_rele(dbuf, FTAG);
|
|
|
|
dmu_buf_will_dirty(dd->dd_dbuf, tx);
|
|
dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj;
|
|
|
|
return (dsobj);
|
|
}
|
|
|
|
static void
|
|
dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx)
|
|
{
|
|
objset_t *os;
|
|
|
|
VERIFY0(dmu_objset_from_ds(ds, &os));
|
|
if (memcmp(&os->os_zil_header, &zero_zil, sizeof (zero_zil)) != 0) {
|
|
dsl_pool_t *dp = ds->ds_dir->dd_pool;
|
|
zio_t *zio;
|
|
|
|
memset(&os->os_zil_header, 0, sizeof (os->os_zil_header));
|
|
if (os->os_encrypted)
|
|
os->os_next_write_raw[tx->tx_txg & TXG_MASK] = B_TRUE;
|
|
|
|
zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
|
|
dsl_dataset_sync(ds, zio, tx);
|
|
VERIFY0(zio_wait(zio));
|
|
dsl_dataset_sync_done(ds, tx);
|
|
}
|
|
}
|
|
|
|
uint64_t
|
|
dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname,
|
|
dsl_dataset_t *origin, uint64_t flags, cred_t *cr,
|
|
dsl_crypto_params_t *dcp, dmu_tx_t *tx)
|
|
{
|
|
dsl_pool_t *dp = pdd->dd_pool;
|
|
uint64_t dsobj, ddobj;
|
|
dsl_dir_t *dd;
|
|
|
|
ASSERT(dmu_tx_is_syncing(tx));
|
|
ASSERT(lastname[0] != '@');
|
|
/*
|
|
* Filesystems will eventually have their origin set to dp_origin_snap,
|
|
* but that's taken care of in dsl_dataset_create_sync_dd. When
|
|
* creating a filesystem, this function is called with origin equal to
|
|
* NULL.
|
|
*/
|
|
if (origin != NULL)
|
|
ASSERT3P(origin, !=, dp->dp_origin_snap);
|
|
|
|
ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx);
|
|
VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd));
|
|
|
|
dsobj = dsl_dataset_create_sync_dd(dd, origin, dcp,
|
|
flags & ~DS_CREATE_FLAG_NODIRTY, tx);
|
|
|
|
dsl_deleg_set_create_perms(dd, tx, cr);
|
|
|
|
/*
|
|
* If we are creating a clone and the livelist feature is enabled,
|
|
* add the entry DD_FIELD_LIVELIST to ZAP.
|
|
*/
|
|
if (origin != NULL &&
|
|
spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LIVELIST)) {
|
|
objset_t *mos = dd->dd_pool->dp_meta_objset;
|
|
dsl_dir_zapify(dd, tx);
|
|
uint64_t obj = dsl_deadlist_alloc(mos, tx);
|
|
VERIFY0(zap_add(mos, dd->dd_object, DD_FIELD_LIVELIST,
|
|
sizeof (uint64_t), 1, &obj, tx));
|
|
spa_feature_incr(dp->dp_spa, SPA_FEATURE_LIVELIST, tx);
|
|
}
|
|
|
|
/*
|
|
* Since we're creating a new node we know it's a leaf, so we can
|
|
* initialize the counts if the limit feature is active.
|
|
*/
|
|
if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) {
|
|
uint64_t cnt = 0;
|
|
objset_t *os = dd->dd_pool->dp_meta_objset;
|
|
|
|
dsl_dir_zapify(dd, tx);
|
|
VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT,
|
|
sizeof (cnt), 1, &cnt, tx));
|
|
VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT,
|
|
sizeof (cnt), 1, &cnt, tx));
|
|
}
|
|
|
|
dsl_dir_rele(dd, FTAG);
|
|
|
|
/*
|
|
* If we are creating a clone, make sure we zero out any stale
|
|
* data from the origin snapshots zil header.
|
|
*/
|
|
if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) {
|
|
dsl_dataset_t *ds;
|
|
|
|
VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds));
|
|
dsl_dataset_zero_zil(ds, tx);
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
|
|
return (dsobj);
|
|
}
|
|
|
|
/*
|
|
* The unique space in the head dataset can be calculated by subtracting
|
|
* the space used in the most recent snapshot, that is still being used
|
|
* in this file system, from the space currently in use. To figure out
|
|
* the space in the most recent snapshot still in use, we need to take
|
|
* the total space used in the snapshot and subtract out the space that
|
|
* has been freed up since the snapshot was taken.
|
|
*/
|
|
void
|
|
dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds)
|
|
{
|
|
uint64_t mrs_used;
|
|
uint64_t dlused, dlcomp, dluncomp;
|
|
|
|
ASSERT(!ds->ds_is_snapshot);
|
|
|
|
if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0)
|
|
mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes;
|
|
else
|
|
mrs_used = 0;
|
|
|
|
dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp);
|
|
|
|
ASSERT3U(dlused, <=, mrs_used);
|
|
dsl_dataset_phys(ds)->ds_unique_bytes =
|
|
dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused);
|
|
|
|
if (spa_version(ds->ds_dir->dd_pool->dp_spa) >=
|
|
SPA_VERSION_UNIQUE_ACCURATE)
|
|
dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE;
|
|
}
|
|
|
|
void
|
|
dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
|
|
dmu_tx_t *tx)
|
|
{
|
|
objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
|
|
uint64_t count __maybe_unused;
|
|
int err;
|
|
|
|
ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2);
|
|
err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj,
|
|
obj, tx);
|
|
/*
|
|
* The err should not be ENOENT, but a bug in a previous version
|
|
* of the code could cause upgrade_clones_cb() to not set
|
|
* ds_next_snap_obj when it should, leading to a missing entry.
|
|
* If we knew that the pool was created after
|
|
* SPA_VERSION_NEXT_CLONES, we could assert that it isn't
|
|
* ENOENT. However, at least we can check that we don't have
|
|
* too many entries in the next_clones_obj even after failing to
|
|
* remove this one.
|
|
*/
|
|
if (err != ENOENT)
|
|
VERIFY0(err);
|
|
ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj,
|
|
&count));
|
|
ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2);
|
|
}
|
|
|
|
|
|
blkptr_t *
|
|
dsl_dataset_get_blkptr(dsl_dataset_t *ds)
|
|
{
|
|
return (&dsl_dataset_phys(ds)->ds_bp);
|
|
}
|
|
|
|
spa_t *
|
|
dsl_dataset_get_spa(dsl_dataset_t *ds)
|
|
{
|
|
return (ds->ds_dir->dd_pool->dp_spa);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx)
|
|
{
|
|
dsl_pool_t *dp;
|
|
|
|
if (ds == NULL) /* this is the meta-objset */
|
|
return;
|
|
|
|
ASSERT(ds->ds_objset != NULL);
|
|
|
|
if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0)
|
|
panic("dirtying snapshot!");
|
|
|
|
/* Must not dirty a dataset in the same txg where it got snapshotted. */
|
|
ASSERT3U(tx->tx_txg, >, dsl_dataset_phys(ds)->ds_prev_snap_txg);
|
|
|
|
dp = ds->ds_dir->dd_pool;
|
|
if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) {
|
|
objset_t *os = ds->ds_objset;
|
|
|
|
/* up the hold count until we can be written out */
|
|
dmu_buf_add_ref(ds->ds_dbuf, ds);
|
|
|
|
/* if this dataset is encrypted, grab a reference to the DCK */
|
|
if (ds->ds_dir->dd_crypto_obj != 0 &&
|
|
!os->os_raw_receive &&
|
|
!os->os_next_write_raw[tx->tx_txg & TXG_MASK]) {
|
|
ASSERT3P(ds->ds_key_mapping, !=, NULL);
|
|
key_mapping_add_ref(ds->ds_key_mapping, ds);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx)
|
|
{
|
|
uint64_t asize;
|
|
|
|
if (!dmu_tx_is_syncing(tx))
|
|
return (0);
|
|
|
|
/*
|
|
* If there's an fs-only reservation, any blocks that might become
|
|
* owned by the snapshot dataset must be accommodated by space
|
|
* outside of the reservation.
|
|
*/
|
|
ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds));
|
|
asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved);
|
|
if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE))
|
|
return (SET_ERROR(ENOSPC));
|
|
|
|
/*
|
|
* Propagate any reserved space for this snapshot to other
|
|
* snapshot checks in this sync group.
|
|
*/
|
|
if (asize > 0)
|
|
dsl_dir_willuse_space(ds->ds_dir, asize, tx);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname,
|
|
dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr, proc_t *proc)
|
|
{
|
|
int error;
|
|
uint64_t value;
|
|
|
|
ds->ds_trysnap_txg = tx->tx_txg;
|
|
|
|
if (!dmu_tx_is_syncing(tx))
|
|
return (0);
|
|
|
|
/*
|
|
* We don't allow multiple snapshots of the same txg. If there
|
|
* is already one, try again.
|
|
*/
|
|
if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg)
|
|
return (SET_ERROR(EAGAIN));
|
|
|
|
/*
|
|
* Check for conflicting snapshot name.
|
|
*/
|
|
error = dsl_dataset_snap_lookup(ds, snapname, &value);
|
|
if (error == 0)
|
|
return (SET_ERROR(EEXIST));
|
|
if (error != ENOENT)
|
|
return (error);
|
|
|
|
/*
|
|
* We don't allow taking snapshots of inconsistent datasets, such as
|
|
* those into which we are currently receiving. However, if we are
|
|
* creating this snapshot as part of a receive, this check will be
|
|
* executed atomically with respect to the completion of the receive
|
|
* itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this
|
|
* case we ignore this, knowing it will be fixed up for us shortly in
|
|
* dmu_recv_end_sync().
|
|
*/
|
|
if (!recv && DS_IS_INCONSISTENT(ds))
|
|
return (SET_ERROR(EBUSY));
|
|
|
|
/*
|
|
* Skip the check for temporary snapshots or if we have already checked
|
|
* the counts in dsl_dataset_snapshot_check. This means we really only
|
|
* check the count here when we're receiving a stream.
|
|
*/
|
|
if (cnt != 0 && cr != NULL) {
|
|
error = dsl_fs_ss_limit_check(ds->ds_dir, cnt,
|
|
ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr, proc);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
error = dsl_dataset_snapshot_reserve_space(ds, tx);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_snapshot_arg_t *ddsa = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
nvpair_t *pair;
|
|
int rv = 0;
|
|
|
|
/*
|
|
* Pre-compute how many total new snapshots will be created for each
|
|
* level in the tree and below. This is needed for validating the
|
|
* snapshot limit when either taking a recursive snapshot or when
|
|
* taking multiple snapshots.
|
|
*
|
|
* The problem is that the counts are not actually adjusted when
|
|
* we are checking, only when we finally sync. For a single snapshot,
|
|
* this is easy, the count will increase by 1 at each node up the tree,
|
|
* but its more complicated for the recursive/multiple snapshot case.
|
|
*
|
|
* The dsl_fs_ss_limit_check function does recursively check the count
|
|
* at each level up the tree but since it is validating each snapshot
|
|
* independently we need to be sure that we are validating the complete
|
|
* count for the entire set of snapshots. We do this by rolling up the
|
|
* counts for each component of the name into an nvlist and then
|
|
* checking each of those cases with the aggregated count.
|
|
*
|
|
* This approach properly handles not only the recursive snapshot
|
|
* case (where we get all of those on the ddsa_snaps list) but also
|
|
* the sibling case (e.g. snapshot a/b and a/c so that we will also
|
|
* validate the limit on 'a' using a count of 2).
|
|
*
|
|
* We validate the snapshot names in the third loop and only report
|
|
* name errors once.
|
|
*/
|
|
if (dmu_tx_is_syncing(tx)) {
|
|
char *nm;
|
|
nvlist_t *cnt_track = NULL;
|
|
cnt_track = fnvlist_alloc();
|
|
|
|
nm = kmem_alloc(MAXPATHLEN, KM_SLEEP);
|
|
|
|
/* Rollup aggregated counts into the cnt_track list */
|
|
for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL);
|
|
pair != NULL;
|
|
pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) {
|
|
char *pdelim;
|
|
uint64_t val;
|
|
|
|
(void) strlcpy(nm, nvpair_name(pair), MAXPATHLEN);
|
|
pdelim = strchr(nm, '@');
|
|
if (pdelim == NULL)
|
|
continue;
|
|
*pdelim = '\0';
|
|
|
|
do {
|
|
if (nvlist_lookup_uint64(cnt_track, nm,
|
|
&val) == 0) {
|
|
/* update existing entry */
|
|
fnvlist_add_uint64(cnt_track, nm,
|
|
val + 1);
|
|
} else {
|
|
/* add to list */
|
|
fnvlist_add_uint64(cnt_track, nm, 1);
|
|
}
|
|
|
|
pdelim = strrchr(nm, '/');
|
|
if (pdelim != NULL)
|
|
*pdelim = '\0';
|
|
} while (pdelim != NULL);
|
|
}
|
|
|
|
kmem_free(nm, MAXPATHLEN);
|
|
|
|
/* Check aggregated counts at each level */
|
|
for (pair = nvlist_next_nvpair(cnt_track, NULL);
|
|
pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) {
|
|
int error = 0;
|
|
const char *name;
|
|
uint64_t cnt = 0;
|
|
dsl_dataset_t *ds;
|
|
|
|
name = nvpair_name(pair);
|
|
cnt = fnvpair_value_uint64(pair);
|
|
ASSERT(cnt > 0);
|
|
|
|
error = dsl_dataset_hold(dp, name, FTAG, &ds);
|
|
if (error == 0) {
|
|
error = dsl_fs_ss_limit_check(ds->ds_dir, cnt,
|
|
ZFS_PROP_SNAPSHOT_LIMIT, NULL,
|
|
ddsa->ddsa_cr, ddsa->ddsa_proc);
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
|
|
if (error != 0) {
|
|
if (ddsa->ddsa_errors != NULL)
|
|
fnvlist_add_int32(ddsa->ddsa_errors,
|
|
name, error);
|
|
rv = error;
|
|
/* only report one error for this check */
|
|
break;
|
|
}
|
|
}
|
|
nvlist_free(cnt_track);
|
|
}
|
|
|
|
for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL);
|
|
pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) {
|
|
int error = 0;
|
|
dsl_dataset_t *ds;
|
|
const char *name, *atp = NULL;
|
|
char dsname[ZFS_MAX_DATASET_NAME_LEN];
|
|
|
|
name = nvpair_name(pair);
|
|
if (strlen(name) >= ZFS_MAX_DATASET_NAME_LEN)
|
|
error = SET_ERROR(ENAMETOOLONG);
|
|
if (error == 0) {
|
|
atp = strchr(name, '@');
|
|
if (atp == NULL)
|
|
error = SET_ERROR(EINVAL);
|
|
if (error == 0)
|
|
(void) strlcpy(dsname, name, atp - name + 1);
|
|
}
|
|
if (error == 0)
|
|
error = dsl_dataset_hold(dp, dsname, FTAG, &ds);
|
|
if (error == 0) {
|
|
/* passing 0/NULL skips dsl_fs_ss_limit_check */
|
|
error = dsl_dataset_snapshot_check_impl(ds,
|
|
atp + 1, tx, B_FALSE, 0, NULL, NULL);
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
|
|
if (error != 0) {
|
|
if (ddsa->ddsa_errors != NULL) {
|
|
fnvlist_add_int32(ddsa->ddsa_errors,
|
|
name, error);
|
|
}
|
|
rv = error;
|
|
}
|
|
}
|
|
|
|
return (rv);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname,
|
|
dmu_tx_t *tx)
|
|
{
|
|
dsl_pool_t *dp = ds->ds_dir->dd_pool;
|
|
dmu_buf_t *dbuf;
|
|
dsl_dataset_phys_t *dsphys;
|
|
uint64_t dsobj, crtxg;
|
|
objset_t *mos = dp->dp_meta_objset;
|
|
objset_t *os __maybe_unused;
|
|
|
|
ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
|
|
|
|
/*
|
|
* If we are on an old pool, the zil must not be active, in which
|
|
* case it will be zeroed. Usually zil_suspend() accomplishes this.
|
|
*/
|
|
ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP ||
|
|
dmu_objset_from_ds(ds, &os) != 0 ||
|
|
memcmp(&os->os_phys->os_zil_header, &zero_zil,
|
|
sizeof (zero_zil)) == 0);
|
|
|
|
/* Should not snapshot a dirty dataset. */
|
|
ASSERT(!txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets,
|
|
ds, tx->tx_txg));
|
|
|
|
dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx);
|
|
|
|
/*
|
|
* The origin's ds_creation_txg has to be < TXG_INITIAL
|
|
*/
|
|
if (strcmp(snapname, ORIGIN_DIR_NAME) == 0)
|
|
crtxg = 1;
|
|
else
|
|
crtxg = tx->tx_txg;
|
|
|
|
dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0,
|
|
DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx);
|
|
VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf));
|
|
dmu_buf_will_dirty(dbuf, tx);
|
|
dsphys = dbuf->db_data;
|
|
memset(dsphys, 0, sizeof (dsl_dataset_phys_t));
|
|
dsphys->ds_dir_obj = ds->ds_dir->dd_object;
|
|
dsphys->ds_fsid_guid = unique_create();
|
|
(void) random_get_pseudo_bytes((void*)&dsphys->ds_guid,
|
|
sizeof (dsphys->ds_guid));
|
|
dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj;
|
|
dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg;
|
|
dsphys->ds_next_snap_obj = ds->ds_object;
|
|
dsphys->ds_num_children = 1;
|
|
dsphys->ds_creation_time = gethrestime_sec();
|
|
dsphys->ds_creation_txg = crtxg;
|
|
dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj;
|
|
dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes;
|
|
dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes;
|
|
dsphys->ds_uncompressed_bytes =
|
|
dsl_dataset_phys(ds)->ds_uncompressed_bytes;
|
|
dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags;
|
|
rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
|
|
dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp;
|
|
rrw_exit(&ds->ds_bp_rwlock, FTAG);
|
|
dmu_buf_rele(dbuf, FTAG);
|
|
|
|
for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
|
|
if (zfeature_active(f, ds->ds_feature[f])) {
|
|
dsl_dataset_activate_feature(dsobj, f,
|
|
ds->ds_feature[f], tx);
|
|
}
|
|
}
|
|
|
|
ASSERT3U(ds->ds_prev != 0, ==,
|
|
dsl_dataset_phys(ds)->ds_prev_snap_obj != 0);
|
|
if (ds->ds_prev) {
|
|
uint64_t next_clones_obj =
|
|
dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj;
|
|
ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj ==
|
|
ds->ds_object ||
|
|
dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1);
|
|
if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj ==
|
|
ds->ds_object) {
|
|
dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
|
|
ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==,
|
|
dsl_dataset_phys(ds->ds_prev)->ds_creation_txg);
|
|
dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj;
|
|
} else if (next_clones_obj != 0) {
|
|
dsl_dataset_remove_from_next_clones(ds->ds_prev,
|
|
dsphys->ds_next_snap_obj, tx);
|
|
VERIFY0(zap_add_int(mos,
|
|
next_clones_obj, dsobj, tx));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we have a reference-reservation on this dataset, we will
|
|
* need to increase the amount of refreservation being charged
|
|
* since our unique space is going to zero.
|
|
*/
|
|
if (ds->ds_reserved) {
|
|
int64_t delta;
|
|
ASSERT(DS_UNIQUE_IS_ACCURATE(ds));
|
|
delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes,
|
|
ds->ds_reserved);
|
|
dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV,
|
|
delta, 0, 0, tx);
|
|
}
|
|
|
|
dmu_buf_will_dirty(ds->ds_dbuf, tx);
|
|
dsl_dataset_phys(ds)->ds_deadlist_obj =
|
|
dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX,
|
|
dsl_dataset_phys(ds)->ds_prev_snap_obj, tx);
|
|
dsl_deadlist_close(&ds->ds_deadlist);
|
|
dsl_deadlist_open(&ds->ds_deadlist, mos,
|
|
dsl_dataset_phys(ds)->ds_deadlist_obj);
|
|
dsl_deadlist_add_key(&ds->ds_deadlist,
|
|
dsl_dataset_phys(ds)->ds_prev_snap_txg, tx);
|
|
dsl_bookmark_snapshotted(ds, tx);
|
|
|
|
if (dsl_dataset_remap_deadlist_exists(ds)) {
|
|
uint64_t remap_deadlist_obj =
|
|
dsl_dataset_get_remap_deadlist_object(ds);
|
|
/*
|
|
* Move the remap_deadlist to the snapshot. The head
|
|
* will create a new remap deadlist on demand, from
|
|
* dsl_dataset_block_remapped().
|
|
*/
|
|
dsl_dataset_unset_remap_deadlist_object(ds, tx);
|
|
dsl_deadlist_close(&ds->ds_remap_deadlist);
|
|
|
|
dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx);
|
|
VERIFY0(zap_add(mos, dsobj, DS_FIELD_REMAP_DEADLIST,
|
|
sizeof (remap_deadlist_obj), 1, &remap_deadlist_obj, tx));
|
|
}
|
|
|
|
/*
|
|
* Create a ivset guid for this snapshot if the dataset is
|
|
* encrypted. This may be overridden by a raw receive. A
|
|
* previous implementation of this code did not have this
|
|
* field as part of the on-disk format for ZFS encryption
|
|
* (see errata #4). As part of the remediation for this
|
|
* issue, we ask the user to enable the bookmark_v2 feature
|
|
* which is now a dependency of the encryption feature. We
|
|
* use this as a heuristic to determine when the user has
|
|
* elected to correct any datasets created with the old code.
|
|
* As a result, we only do this step if the bookmark_v2
|
|
* feature is enabled, which limits the number of states a
|
|
* given pool / dataset can be in with regards to terms of
|
|
* correcting the issue.
|
|
*/
|
|
if (ds->ds_dir->dd_crypto_obj != 0 &&
|
|
spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_BOOKMARK_V2)) {
|
|
uint64_t ivset_guid = unique_create();
|
|
|
|
dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx);
|
|
VERIFY0(zap_add(mos, dsobj, DS_FIELD_IVSET_GUID,
|
|
sizeof (ivset_guid), 1, &ivset_guid, tx));
|
|
}
|
|
|
|
ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg);
|
|
dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj;
|
|
dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg;
|
|
dsl_dataset_phys(ds)->ds_unique_bytes = 0;
|
|
|
|
if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE)
|
|
dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE;
|
|
|
|
VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj,
|
|
snapname, 8, 1, &dsobj, tx));
|
|
|
|
if (ds->ds_prev)
|
|
dsl_dataset_rele(ds->ds_prev, ds);
|
|
VERIFY0(dsl_dataset_hold_obj(dp,
|
|
dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev));
|
|
|
|
dsl_scan_ds_snapshotted(ds, tx);
|
|
|
|
dsl_dir_snap_cmtime_update(ds->ds_dir, tx);
|
|
|
|
if (zfs_snapshot_history_enabled)
|
|
spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, " ");
|
|
}
|
|
|
|
void
|
|
dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_snapshot_arg_t *ddsa = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
nvpair_t *pair;
|
|
|
|
for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL);
|
|
pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) {
|
|
dsl_dataset_t *ds;
|
|
const char *name, *atp;
|
|
char dsname[ZFS_MAX_DATASET_NAME_LEN];
|
|
|
|
name = nvpair_name(pair);
|
|
atp = strchr(name, '@');
|
|
(void) strlcpy(dsname, name, atp - name + 1);
|
|
VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds));
|
|
|
|
dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx);
|
|
if (ddsa->ddsa_props != NULL) {
|
|
dsl_props_set_sync_impl(ds->ds_prev,
|
|
ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx);
|
|
}
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The snapshots must all be in the same pool.
|
|
* All-or-nothing: if there are any failures, nothing will be modified.
|
|
*/
|
|
int
|
|
dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors)
|
|
{
|
|
dsl_dataset_snapshot_arg_t ddsa;
|
|
nvpair_t *pair;
|
|
boolean_t needsuspend;
|
|
int error;
|
|
spa_t *spa;
|
|
const char *firstname;
|
|
nvlist_t *suspended = NULL;
|
|
|
|
pair = nvlist_next_nvpair(snaps, NULL);
|
|
if (pair == NULL)
|
|
return (0);
|
|
firstname = nvpair_name(pair);
|
|
|
|
error = spa_open(firstname, &spa, FTAG);
|
|
if (error != 0)
|
|
return (error);
|
|
needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP);
|
|
spa_close(spa, FTAG);
|
|
|
|
if (needsuspend) {
|
|
suspended = fnvlist_alloc();
|
|
for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
|
|
pair = nvlist_next_nvpair(snaps, pair)) {
|
|
char fsname[ZFS_MAX_DATASET_NAME_LEN];
|
|
const char *snapname = nvpair_name(pair);
|
|
const char *atp;
|
|
void *cookie;
|
|
|
|
atp = strchr(snapname, '@');
|
|
if (atp == NULL) {
|
|
error = SET_ERROR(EINVAL);
|
|
break;
|
|
}
|
|
(void) strlcpy(fsname, snapname, atp - snapname + 1);
|
|
|
|
error = zil_suspend(fsname, &cookie);
|
|
if (error != 0)
|
|
break;
|
|
fnvlist_add_uint64(suspended, fsname,
|
|
(uintptr_t)cookie);
|
|
}
|
|
}
|
|
|
|
ddsa.ddsa_snaps = snaps;
|
|
ddsa.ddsa_props = props;
|
|
ddsa.ddsa_errors = errors;
|
|
ddsa.ddsa_cr = CRED();
|
|
ddsa.ddsa_proc = curproc;
|
|
|
|
if (error == 0) {
|
|
error = dsl_sync_task(firstname, dsl_dataset_snapshot_check,
|
|
dsl_dataset_snapshot_sync, &ddsa,
|
|
fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL);
|
|
}
|
|
|
|
if (suspended != NULL) {
|
|
for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL;
|
|
pair = nvlist_next_nvpair(suspended, pair)) {
|
|
zil_resume((void *)(uintptr_t)
|
|
fnvpair_value_uint64(pair));
|
|
}
|
|
fnvlist_free(suspended);
|
|
}
|
|
|
|
if (error == 0) {
|
|
for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
|
|
pair = nvlist_next_nvpair(snaps, pair)) {
|
|
zvol_create_minor(nvpair_name(pair));
|
|
}
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
typedef struct dsl_dataset_snapshot_tmp_arg {
|
|
const char *ddsta_fsname;
|
|
const char *ddsta_snapname;
|
|
minor_t ddsta_cleanup_minor;
|
|
const char *ddsta_htag;
|
|
} dsl_dataset_snapshot_tmp_arg_t;
|
|
|
|
static int
|
|
dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_snapshot_tmp_arg_t *ddsta = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *ds;
|
|
int error;
|
|
|
|
error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
/* NULL cred means no limit check for tmp snapshot */
|
|
error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname,
|
|
tx, B_FALSE, 0, NULL, NULL);
|
|
if (error != 0) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (error);
|
|
}
|
|
|
|
if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (SET_ERROR(ENOTSUP));
|
|
}
|
|
error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag,
|
|
B_TRUE, tx);
|
|
if (error != 0) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (error);
|
|
}
|
|
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_snapshot_tmp_arg_t *ddsta = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *ds = NULL;
|
|
|
|
VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds));
|
|
|
|
dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx);
|
|
dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag,
|
|
ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx);
|
|
dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx);
|
|
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
|
|
minor_t cleanup_minor, const char *htag)
|
|
{
|
|
dsl_dataset_snapshot_tmp_arg_t ddsta;
|
|
int error;
|
|
spa_t *spa;
|
|
boolean_t needsuspend;
|
|
void *cookie;
|
|
|
|
ddsta.ddsta_fsname = fsname;
|
|
ddsta.ddsta_snapname = snapname;
|
|
ddsta.ddsta_cleanup_minor = cleanup_minor;
|
|
ddsta.ddsta_htag = htag;
|
|
|
|
error = spa_open(fsname, &spa, FTAG);
|
|
if (error != 0)
|
|
return (error);
|
|
needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP);
|
|
spa_close(spa, FTAG);
|
|
|
|
if (needsuspend) {
|
|
error = zil_suspend(fsname, &cookie);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check,
|
|
dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED);
|
|
|
|
if (needsuspend)
|
|
zil_resume(cookie);
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx)
|
|
{
|
|
ASSERT(dmu_tx_is_syncing(tx));
|
|
ASSERT(ds->ds_objset != NULL);
|
|
ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0);
|
|
|
|
/*
|
|
* in case we had to change ds_fsid_guid when we opened it,
|
|
* sync it out now.
|
|
*/
|
|
dmu_buf_will_dirty(ds->ds_dbuf, tx);
|
|
dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid;
|
|
|
|
if (ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] != 0) {
|
|
VERIFY0(zap_update(tx->tx_pool->dp_meta_objset,
|
|
ds->ds_object, DS_FIELD_RESUME_OBJECT, 8, 1,
|
|
&ds->ds_resume_object[tx->tx_txg & TXG_MASK], tx));
|
|
VERIFY0(zap_update(tx->tx_pool->dp_meta_objset,
|
|
ds->ds_object, DS_FIELD_RESUME_OFFSET, 8, 1,
|
|
&ds->ds_resume_offset[tx->tx_txg & TXG_MASK], tx));
|
|
VERIFY0(zap_update(tx->tx_pool->dp_meta_objset,
|
|
ds->ds_object, DS_FIELD_RESUME_BYTES, 8, 1,
|
|
&ds->ds_resume_bytes[tx->tx_txg & TXG_MASK], tx));
|
|
ds->ds_resume_object[tx->tx_txg & TXG_MASK] = 0;
|
|
ds->ds_resume_offset[tx->tx_txg & TXG_MASK] = 0;
|
|
ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] = 0;
|
|
}
|
|
|
|
dmu_objset_sync(ds->ds_objset, zio, tx);
|
|
}
|
|
|
|
/*
|
|
* Check if the percentage of blocks shared between the clone and the
|
|
* snapshot (as opposed to those that are clone only) is below a certain
|
|
* threshold
|
|
*/
|
|
static boolean_t
|
|
dsl_livelist_should_disable(dsl_dataset_t *ds)
|
|
{
|
|
uint64_t used, referenced;
|
|
int percent_shared;
|
|
|
|
used = dsl_dir_get_usedds(ds->ds_dir);
|
|
referenced = dsl_get_referenced(ds);
|
|
if (referenced == 0)
|
|
return (B_FALSE);
|
|
percent_shared = (100 * (referenced - used)) / referenced;
|
|
if (percent_shared <= zfs_livelist_min_percent_shared)
|
|
return (B_TRUE);
|
|
return (B_FALSE);
|
|
}
|
|
|
|
/*
|
|
* Check if it is possible to combine two livelist entries into one.
|
|
* This is the case if the combined number of 'live' blkptrs (ALLOCs that
|
|
* don't have a matching FREE) is under the maximum sublist size.
|
|
* We check this by subtracting twice the total number of frees from the total
|
|
* number of blkptrs. FREEs are counted twice because each FREE blkptr
|
|
* will cancel out an ALLOC blkptr when the livelist is processed.
|
|
*/
|
|
static boolean_t
|
|
dsl_livelist_should_condense(dsl_deadlist_entry_t *first,
|
|
dsl_deadlist_entry_t *next)
|
|
{
|
|
uint64_t total_free = first->dle_bpobj.bpo_phys->bpo_num_freed +
|
|
next->dle_bpobj.bpo_phys->bpo_num_freed;
|
|
uint64_t total_entries = first->dle_bpobj.bpo_phys->bpo_num_blkptrs +
|
|
next->dle_bpobj.bpo_phys->bpo_num_blkptrs;
|
|
if ((total_entries - (2 * total_free)) < zfs_livelist_max_entries)
|
|
return (B_TRUE);
|
|
return (B_FALSE);
|
|
}
|
|
|
|
typedef struct try_condense_arg {
|
|
spa_t *spa;
|
|
dsl_dataset_t *ds;
|
|
} try_condense_arg_t;
|
|
|
|
/*
|
|
* Iterate over the livelist entries, searching for a pair to condense.
|
|
* A nonzero return value means stop, 0 means keep looking.
|
|
*/
|
|
static int
|
|
dsl_livelist_try_condense(void *arg, dsl_deadlist_entry_t *first)
|
|
{
|
|
try_condense_arg_t *tca = arg;
|
|
spa_t *spa = tca->spa;
|
|
dsl_dataset_t *ds = tca->ds;
|
|
dsl_deadlist_t *ll = &ds->ds_dir->dd_livelist;
|
|
dsl_deadlist_entry_t *next;
|
|
|
|
/* The condense thread has not yet been created at import */
|
|
if (spa->spa_livelist_condense_zthr == NULL)
|
|
return (1);
|
|
|
|
/* A condense is already in progress */
|
|
if (spa->spa_to_condense.ds != NULL)
|
|
return (1);
|
|
|
|
next = AVL_NEXT(&ll->dl_tree, &first->dle_node);
|
|
/* The livelist has only one entry - don't condense it */
|
|
if (next == NULL)
|
|
return (1);
|
|
|
|
/* Next is the newest entry - don't condense it */
|
|
if (AVL_NEXT(&ll->dl_tree, &next->dle_node) == NULL)
|
|
return (1);
|
|
|
|
/* This pair is not ready to condense but keep looking */
|
|
if (!dsl_livelist_should_condense(first, next))
|
|
return (0);
|
|
|
|
/*
|
|
* Add a ref to prevent the dataset from being evicted while
|
|
* the condense zthr or synctask are running. Ref will be
|
|
* released at the end of the condense synctask
|
|
*/
|
|
dmu_buf_add_ref(ds->ds_dbuf, spa);
|
|
|
|
spa->spa_to_condense.ds = ds;
|
|
spa->spa_to_condense.first = first;
|
|
spa->spa_to_condense.next = next;
|
|
spa->spa_to_condense.syncing = B_FALSE;
|
|
spa->spa_to_condense.cancelled = B_FALSE;
|
|
|
|
zthr_wakeup(spa->spa_livelist_condense_zthr);
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
dsl_flush_pending_livelist(dsl_dataset_t *ds, dmu_tx_t *tx)
|
|
{
|
|
dsl_dir_t *dd = ds->ds_dir;
|
|
spa_t *spa = ds->ds_dir->dd_pool->dp_spa;
|
|
dsl_deadlist_entry_t *last = dsl_deadlist_last(&dd->dd_livelist);
|
|
|
|
/* Check if we need to add a new sub-livelist */
|
|
if (last == NULL) {
|
|
/* The livelist is empty */
|
|
dsl_deadlist_add_key(&dd->dd_livelist,
|
|
tx->tx_txg - 1, tx);
|
|
} else if (spa_sync_pass(spa) == 1) {
|
|
/*
|
|
* Check if the newest entry is full. If it is, make a new one.
|
|
* We only do this once per sync because we could overfill a
|
|
* sublist in one sync pass and don't want to add another entry
|
|
* for a txg that is already represented. This ensures that
|
|
* blkptrs born in the same txg are stored in the same sublist.
|
|
*/
|
|
bpobj_t bpobj = last->dle_bpobj;
|
|
uint64_t all = bpobj.bpo_phys->bpo_num_blkptrs;
|
|
uint64_t free = bpobj.bpo_phys->bpo_num_freed;
|
|
uint64_t alloc = all - free;
|
|
if (alloc > zfs_livelist_max_entries) {
|
|
dsl_deadlist_add_key(&dd->dd_livelist,
|
|
tx->tx_txg - 1, tx);
|
|
}
|
|
}
|
|
|
|
/* Insert each entry into the on-disk livelist */
|
|
bplist_iterate(&dd->dd_pending_allocs,
|
|
dsl_deadlist_insert_alloc_cb, &dd->dd_livelist, tx);
|
|
bplist_iterate(&dd->dd_pending_frees,
|
|
dsl_deadlist_insert_free_cb, &dd->dd_livelist, tx);
|
|
|
|
/* Attempt to condense every pair of adjacent entries */
|
|
try_condense_arg_t arg = {
|
|
.spa = spa,
|
|
.ds = ds
|
|
};
|
|
dsl_deadlist_iterate(&dd->dd_livelist, dsl_livelist_try_condense,
|
|
&arg);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_sync_done(dsl_dataset_t *ds, dmu_tx_t *tx)
|
|
{
|
|
objset_t *os = ds->ds_objset;
|
|
|
|
bplist_iterate(&ds->ds_pending_deadlist,
|
|
dsl_deadlist_insert_alloc_cb, &ds->ds_deadlist, tx);
|
|
|
|
if (dsl_deadlist_is_open(&ds->ds_dir->dd_livelist)) {
|
|
dsl_flush_pending_livelist(ds, tx);
|
|
if (dsl_livelist_should_disable(ds)) {
|
|
dsl_dir_remove_livelist(ds->ds_dir, tx, B_TRUE);
|
|
}
|
|
}
|
|
|
|
dsl_bookmark_sync_done(ds, tx);
|
|
|
|
multilist_destroy(&os->os_synced_dnodes);
|
|
|
|
if (os->os_encrypted)
|
|
os->os_next_write_raw[tx->tx_txg & TXG_MASK] = B_FALSE;
|
|
else
|
|
ASSERT0(os->os_next_write_raw[tx->tx_txg & TXG_MASK]);
|
|
|
|
for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
|
|
if (zfeature_active(f,
|
|
ds->ds_feature_activation[f])) {
|
|
if (zfeature_active(f, ds->ds_feature[f]))
|
|
continue;
|
|
dsl_dataset_activate_feature(ds->ds_object, f,
|
|
ds->ds_feature_activation[f], tx);
|
|
ds->ds_feature[f] = ds->ds_feature_activation[f];
|
|
}
|
|
}
|
|
|
|
ASSERT(!dmu_objset_is_dirty(os, dmu_tx_get_txg(tx)));
|
|
}
|
|
|
|
int
|
|
get_clones_stat_impl(dsl_dataset_t *ds, nvlist_t *val)
|
|
{
|
|
uint64_t count = 0;
|
|
objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
|
|
zap_cursor_t zc;
|
|
zap_attribute_t za;
|
|
|
|
ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
|
|
|
|
/*
|
|
* There may be missing entries in ds_next_clones_obj
|
|
* due to a bug in a previous version of the code.
|
|
* Only trust it if it has the right number of entries.
|
|
*/
|
|
if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) {
|
|
VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj,
|
|
&count));
|
|
}
|
|
if (count != dsl_dataset_phys(ds)->ds_num_children - 1) {
|
|
return (SET_ERROR(ENOENT));
|
|
}
|
|
for (zap_cursor_init(&zc, mos,
|
|
dsl_dataset_phys(ds)->ds_next_clones_obj);
|
|
zap_cursor_retrieve(&zc, &za) == 0;
|
|
zap_cursor_advance(&zc)) {
|
|
dsl_dataset_t *clone;
|
|
char buf[ZFS_MAX_DATASET_NAME_LEN];
|
|
VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool,
|
|
za.za_first_integer, FTAG, &clone));
|
|
dsl_dir_name(clone->ds_dir, buf);
|
|
fnvlist_add_boolean(val, buf);
|
|
dsl_dataset_rele(clone, FTAG);
|
|
}
|
|
zap_cursor_fini(&zc);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv)
|
|
{
|
|
nvlist_t *propval = fnvlist_alloc();
|
|
nvlist_t *val = fnvlist_alloc();
|
|
|
|
if (get_clones_stat_impl(ds, val) == 0) {
|
|
fnvlist_add_nvlist(propval, ZPROP_VALUE, val);
|
|
fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES),
|
|
propval);
|
|
}
|
|
|
|
nvlist_free(val);
|
|
nvlist_free(propval);
|
|
}
|
|
|
|
static char *
|
|
get_receive_resume_token_impl(dsl_dataset_t *ds)
|
|
{
|
|
if (!dsl_dataset_has_resume_receive_state(ds))
|
|
return (NULL);
|
|
|
|
dsl_pool_t *dp = ds->ds_dir->dd_pool;
|
|
char *str;
|
|
void *packed;
|
|
uint8_t *compressed;
|
|
uint64_t val;
|
|
nvlist_t *token_nv = fnvlist_alloc();
|
|
size_t packed_size, compressed_size;
|
|
|
|
if (zap_lookup(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val) == 0) {
|
|
fnvlist_add_uint64(token_nv, "fromguid", val);
|
|
}
|
|
if (zap_lookup(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val) == 0) {
|
|
fnvlist_add_uint64(token_nv, "object", val);
|
|
}
|
|
if (zap_lookup(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val) == 0) {
|
|
fnvlist_add_uint64(token_nv, "offset", val);
|
|
}
|
|
if (zap_lookup(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_BYTES, sizeof (val), 1, &val) == 0) {
|
|
fnvlist_add_uint64(token_nv, "bytes", val);
|
|
}
|
|
if (zap_lookup(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val) == 0) {
|
|
fnvlist_add_uint64(token_nv, "toguid", val);
|
|
}
|
|
char buf[MAXNAMELEN];
|
|
if (zap_lookup(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_TONAME, 1, sizeof (buf), buf) == 0) {
|
|
fnvlist_add_string(token_nv, "toname", buf);
|
|
}
|
|
if (zap_contains(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_LARGEBLOCK) == 0) {
|
|
fnvlist_add_boolean(token_nv, "largeblockok");
|
|
}
|
|
if (zap_contains(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_EMBEDOK) == 0) {
|
|
fnvlist_add_boolean(token_nv, "embedok");
|
|
}
|
|
if (zap_contains(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_COMPRESSOK) == 0) {
|
|
fnvlist_add_boolean(token_nv, "compressok");
|
|
}
|
|
if (zap_contains(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_RAWOK) == 0) {
|
|
fnvlist_add_boolean(token_nv, "rawok");
|
|
}
|
|
if (dsl_dataset_feature_is_active(ds,
|
|
SPA_FEATURE_REDACTED_DATASETS)) {
|
|
uint64_t num_redact_snaps = 0;
|
|
uint64_t *redact_snaps = NULL;
|
|
VERIFY3B(dsl_dataset_get_uint64_array_feature(ds,
|
|
SPA_FEATURE_REDACTED_DATASETS, &num_redact_snaps,
|
|
&redact_snaps), ==, B_TRUE);
|
|
fnvlist_add_uint64_array(token_nv, "redact_snaps",
|
|
redact_snaps, num_redact_snaps);
|
|
}
|
|
if (zap_contains(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_REDACT_BOOKMARK_SNAPS) == 0) {
|
|
uint64_t num_redact_snaps = 0, int_size = 0;
|
|
uint64_t *redact_snaps = NULL;
|
|
VERIFY0(zap_length(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_REDACT_BOOKMARK_SNAPS, &int_size,
|
|
&num_redact_snaps));
|
|
ASSERT3U(int_size, ==, sizeof (uint64_t));
|
|
|
|
redact_snaps = kmem_alloc(int_size * num_redact_snaps,
|
|
KM_SLEEP);
|
|
VERIFY0(zap_lookup(dp->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_RESUME_REDACT_BOOKMARK_SNAPS, int_size,
|
|
num_redact_snaps, redact_snaps));
|
|
fnvlist_add_uint64_array(token_nv, "book_redact_snaps",
|
|
redact_snaps, num_redact_snaps);
|
|
kmem_free(redact_snaps, int_size * num_redact_snaps);
|
|
}
|
|
packed = fnvlist_pack(token_nv, &packed_size);
|
|
fnvlist_free(token_nv);
|
|
compressed = kmem_alloc(packed_size, KM_SLEEP);
|
|
|
|
compressed_size = gzip_compress(packed, compressed,
|
|
packed_size, packed_size, 6);
|
|
|
|
zio_cksum_t cksum;
|
|
fletcher_4_native_varsize(compressed, compressed_size, &cksum);
|
|
|
|
size_t alloc_size = compressed_size * 2 + 1;
|
|
str = kmem_alloc(alloc_size, KM_SLEEP);
|
|
for (int i = 0; i < compressed_size; i++) {
|
|
size_t offset = i * 2;
|
|
(void) snprintf(str + offset, alloc_size - offset,
|
|
"%02x", compressed[i]);
|
|
}
|
|
str[compressed_size * 2] = '\0';
|
|
char *propval = kmem_asprintf("%u-%llx-%llx-%s",
|
|
ZFS_SEND_RESUME_TOKEN_VERSION,
|
|
(longlong_t)cksum.zc_word[0],
|
|
(longlong_t)packed_size, str);
|
|
kmem_free(packed, packed_size);
|
|
kmem_free(str, alloc_size);
|
|
kmem_free(compressed, packed_size);
|
|
return (propval);
|
|
}
|
|
|
|
/*
|
|
* Returns a string that represents the receive resume state token. It should
|
|
* be freed with strfree(). NULL is returned if no resume state is present.
|
|
*/
|
|
char *
|
|
get_receive_resume_token(dsl_dataset_t *ds)
|
|
{
|
|
/*
|
|
* A failed "newfs" (e.g. full) resumable receive leaves
|
|
* the stats set on this dataset. Check here for the prop.
|
|
*/
|
|
char *token = get_receive_resume_token_impl(ds);
|
|
if (token != NULL)
|
|
return (token);
|
|
/*
|
|
* A failed incremental resumable receive leaves the
|
|
* stats set on our child named "%recv". Check the child
|
|
* for the prop.
|
|
*/
|
|
/* 6 extra bytes for /%recv */
|
|
char name[ZFS_MAX_DATASET_NAME_LEN + 6];
|
|
dsl_dataset_t *recv_ds;
|
|
dsl_dataset_name(ds, name);
|
|
if (strlcat(name, "/", sizeof (name)) < sizeof (name) &&
|
|
strlcat(name, recv_clone_name, sizeof (name)) < sizeof (name) &&
|
|
dsl_dataset_hold(ds->ds_dir->dd_pool, name, FTAG, &recv_ds) == 0) {
|
|
token = get_receive_resume_token_impl(recv_ds);
|
|
dsl_dataset_rele(recv_ds, FTAG);
|
|
}
|
|
return (token);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_refratio(dsl_dataset_t *ds)
|
|
{
|
|
uint64_t ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 :
|
|
(dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 /
|
|
dsl_dataset_phys(ds)->ds_compressed_bytes);
|
|
return (ratio);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_logicalreferenced(dsl_dataset_t *ds)
|
|
{
|
|
return (dsl_dataset_phys(ds)->ds_uncompressed_bytes);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_compressratio(dsl_dataset_t *ds)
|
|
{
|
|
if (ds->ds_is_snapshot) {
|
|
return (dsl_get_refratio(ds));
|
|
} else {
|
|
dsl_dir_t *dd = ds->ds_dir;
|
|
mutex_enter(&dd->dd_lock);
|
|
uint64_t val = dsl_dir_get_compressratio(dd);
|
|
mutex_exit(&dd->dd_lock);
|
|
return (val);
|
|
}
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_used(dsl_dataset_t *ds)
|
|
{
|
|
if (ds->ds_is_snapshot) {
|
|
return (dsl_dataset_phys(ds)->ds_unique_bytes);
|
|
} else {
|
|
dsl_dir_t *dd = ds->ds_dir;
|
|
mutex_enter(&dd->dd_lock);
|
|
uint64_t val = dsl_dir_get_used(dd);
|
|
mutex_exit(&dd->dd_lock);
|
|
return (val);
|
|
}
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_creation(dsl_dataset_t *ds)
|
|
{
|
|
return (dsl_dataset_phys(ds)->ds_creation_time);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_creationtxg(dsl_dataset_t *ds)
|
|
{
|
|
return (dsl_dataset_phys(ds)->ds_creation_txg);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_refquota(dsl_dataset_t *ds)
|
|
{
|
|
return (ds->ds_quota);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_refreservation(dsl_dataset_t *ds)
|
|
{
|
|
return (ds->ds_reserved);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_guid(dsl_dataset_t *ds)
|
|
{
|
|
return (dsl_dataset_phys(ds)->ds_guid);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_unique(dsl_dataset_t *ds)
|
|
{
|
|
return (dsl_dataset_phys(ds)->ds_unique_bytes);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_objsetid(dsl_dataset_t *ds)
|
|
{
|
|
return (ds->ds_object);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_userrefs(dsl_dataset_t *ds)
|
|
{
|
|
return (ds->ds_userrefs);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_defer_destroy(dsl_dataset_t *ds)
|
|
{
|
|
return (DS_IS_DEFER_DESTROY(ds) ? 1 : 0);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_referenced(dsl_dataset_t *ds)
|
|
{
|
|
return (dsl_dataset_phys(ds)->ds_referenced_bytes);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_numclones(dsl_dataset_t *ds)
|
|
{
|
|
ASSERT(ds->ds_is_snapshot);
|
|
return (dsl_dataset_phys(ds)->ds_num_children - 1);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_inconsistent(dsl_dataset_t *ds)
|
|
{
|
|
return ((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT) ?
|
|
1 : 0);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_redacted(dsl_dataset_t *ds)
|
|
{
|
|
return (dsl_dataset_feature_is_active(ds,
|
|
SPA_FEATURE_REDACTED_DATASETS));
|
|
}
|
|
|
|
uint64_t
|
|
dsl_get_available(dsl_dataset_t *ds)
|
|
{
|
|
uint64_t refdbytes = dsl_get_referenced(ds);
|
|
uint64_t availbytes = dsl_dir_space_available(ds->ds_dir,
|
|
NULL, 0, TRUE);
|
|
if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) {
|
|
availbytes +=
|
|
ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes;
|
|
}
|
|
if (ds->ds_quota != 0) {
|
|
/*
|
|
* Adjust available bytes according to refquota
|
|
*/
|
|
if (refdbytes < ds->ds_quota) {
|
|
availbytes = MIN(availbytes,
|
|
ds->ds_quota - refdbytes);
|
|
} else {
|
|
availbytes = 0;
|
|
}
|
|
}
|
|
return (availbytes);
|
|
}
|
|
|
|
int
|
|
dsl_get_written(dsl_dataset_t *ds, uint64_t *written)
|
|
{
|
|
dsl_pool_t *dp = ds->ds_dir->dd_pool;
|
|
dsl_dataset_t *prev;
|
|
int err = dsl_dataset_hold_obj(dp,
|
|
dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev);
|
|
if (err == 0) {
|
|
uint64_t comp, uncomp;
|
|
err = dsl_dataset_space_written(prev, ds, written,
|
|
&comp, &uncomp);
|
|
dsl_dataset_rele(prev, FTAG);
|
|
}
|
|
return (err);
|
|
}
|
|
|
|
/*
|
|
* 'snap' should be a buffer of size ZFS_MAX_DATASET_NAME_LEN.
|
|
*/
|
|
int
|
|
dsl_get_prev_snap(dsl_dataset_t *ds, char *snap)
|
|
{
|
|
dsl_pool_t *dp = ds->ds_dir->dd_pool;
|
|
if (ds->ds_prev != NULL && ds->ds_prev != dp->dp_origin_snap) {
|
|
dsl_dataset_name(ds->ds_prev, snap);
|
|
return (0);
|
|
} else {
|
|
return (SET_ERROR(ENOENT));
|
|
}
|
|
}
|
|
|
|
void
|
|
dsl_get_redact_snaps(dsl_dataset_t *ds, nvlist_t *propval)
|
|
{
|
|
uint64_t nsnaps;
|
|
uint64_t *snaps;
|
|
if (dsl_dataset_get_uint64_array_feature(ds,
|
|
SPA_FEATURE_REDACTED_DATASETS, &nsnaps, &snaps)) {
|
|
fnvlist_add_uint64_array(propval, ZPROP_VALUE, snaps,
|
|
nsnaps);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Returns the mountpoint property and source for the given dataset in the value
|
|
* and source buffers. The value buffer must be at least as large as MAXPATHLEN
|
|
* and the source buffer as least as large a ZFS_MAX_DATASET_NAME_LEN.
|
|
* Returns 0 on success and an error on failure.
|
|
*/
|
|
int
|
|
dsl_get_mountpoint(dsl_dataset_t *ds, const char *dsname, char *value,
|
|
char *source)
|
|
{
|
|
int error;
|
|
dsl_pool_t *dp = ds->ds_dir->dd_pool;
|
|
|
|
/* Retrieve the mountpoint value stored in the zap object */
|
|
error = dsl_prop_get_ds(ds, zfs_prop_to_name(ZFS_PROP_MOUNTPOINT), 1,
|
|
ZAP_MAXVALUELEN, value, source);
|
|
if (error != 0) {
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Process the dsname and source to find the full mountpoint string.
|
|
* Can be skipped for 'legacy' or 'none'.
|
|
*/
|
|
if (value[0] == '/') {
|
|
char *buf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP);
|
|
char *root = buf;
|
|
const char *relpath;
|
|
|
|
/*
|
|
* If we inherit the mountpoint, even from a dataset
|
|
* with a received value, the source will be the path of
|
|
* the dataset we inherit from. If source is
|
|
* ZPROP_SOURCE_VAL_RECVD, the received value is not
|
|
* inherited.
|
|
*/
|
|
if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
|
|
relpath = "";
|
|
} else {
|
|
ASSERT0(strncmp(dsname, source, strlen(source)));
|
|
relpath = dsname + strlen(source);
|
|
if (relpath[0] == '/')
|
|
relpath++;
|
|
}
|
|
|
|
spa_altroot(dp->dp_spa, root, ZAP_MAXVALUELEN);
|
|
|
|
/*
|
|
* Special case an alternate root of '/'. This will
|
|
* avoid having multiple leading slashes in the
|
|
* mountpoint path.
|
|
*/
|
|
if (strcmp(root, "/") == 0)
|
|
root++;
|
|
|
|
/*
|
|
* If the mountpoint is '/' then skip over this
|
|
* if we are obtaining either an alternate root or
|
|
* an inherited mountpoint.
|
|
*/
|
|
char *mnt = value;
|
|
if (value[1] == '\0' && (root[0] != '\0' ||
|
|
relpath[0] != '\0'))
|
|
mnt = value + 1;
|
|
|
|
mnt = kmem_strdup(mnt);
|
|
|
|
if (relpath[0] == '\0') {
|
|
(void) snprintf(value, ZAP_MAXVALUELEN, "%s%s",
|
|
root, mnt);
|
|
} else {
|
|
(void) snprintf(value, ZAP_MAXVALUELEN, "%s%s%s%s",
|
|
root, mnt, relpath[0] == '@' ? "" : "/",
|
|
relpath);
|
|
}
|
|
kmem_free(buf, ZAP_MAXVALUELEN);
|
|
kmem_strfree(mnt);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv)
|
|
{
|
|
dsl_pool_t *dp __maybe_unused = ds->ds_dir->dd_pool;
|
|
|
|
ASSERT(dsl_pool_config_held(dp));
|
|
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO,
|
|
dsl_get_refratio(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED,
|
|
dsl_get_logicalreferenced(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO,
|
|
dsl_get_compressratio(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED,
|
|
dsl_get_used(ds));
|
|
|
|
if (ds->ds_is_snapshot) {
|
|
get_clones_stat(ds, nv);
|
|
} else {
|
|
char buf[ZFS_MAX_DATASET_NAME_LEN];
|
|
if (dsl_get_prev_snap(ds, buf) == 0)
|
|
dsl_prop_nvlist_add_string(nv, ZFS_PROP_PREV_SNAP,
|
|
buf);
|
|
dsl_dir_stats(ds->ds_dir, nv);
|
|
}
|
|
|
|
nvlist_t *propval = fnvlist_alloc();
|
|
dsl_get_redact_snaps(ds, propval);
|
|
fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_REDACT_SNAPS),
|
|
propval);
|
|
nvlist_free(propval);
|
|
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE,
|
|
dsl_get_available(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED,
|
|
dsl_get_referenced(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION,
|
|
dsl_get_creation(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG,
|
|
dsl_get_creationtxg(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA,
|
|
dsl_get_refquota(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION,
|
|
dsl_get_refreservation(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID,
|
|
dsl_get_guid(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE,
|
|
dsl_get_unique(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID,
|
|
dsl_get_objsetid(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS,
|
|
dsl_get_userrefs(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY,
|
|
dsl_get_defer_destroy(ds));
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_SNAPSHOTS_CHANGED,
|
|
dsl_dir_snap_cmtime(ds->ds_dir).tv_sec);
|
|
dsl_dataset_crypt_stats(ds, nv);
|
|
|
|
if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) {
|
|
uint64_t written;
|
|
if (dsl_get_written(ds, &written) == 0) {
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN,
|
|
written);
|
|
}
|
|
}
|
|
|
|
if (!dsl_dataset_is_snapshot(ds)) {
|
|
char *token = get_receive_resume_token(ds);
|
|
if (token != NULL) {
|
|
dsl_prop_nvlist_add_string(nv,
|
|
ZFS_PROP_RECEIVE_RESUME_TOKEN, token);
|
|
kmem_strfree(token);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat)
|
|
{
|
|
dsl_pool_t *dp __maybe_unused = ds->ds_dir->dd_pool;
|
|
ASSERT(dsl_pool_config_held(dp));
|
|
|
|
stat->dds_creation_txg = dsl_get_creationtxg(ds);
|
|
stat->dds_inconsistent = dsl_get_inconsistent(ds);
|
|
stat->dds_guid = dsl_get_guid(ds);
|
|
stat->dds_redacted = dsl_get_redacted(ds);
|
|
stat->dds_origin[0] = '\0';
|
|
if (ds->ds_is_snapshot) {
|
|
stat->dds_is_snapshot = B_TRUE;
|
|
stat->dds_num_clones = dsl_get_numclones(ds);
|
|
} else {
|
|
stat->dds_is_snapshot = B_FALSE;
|
|
stat->dds_num_clones = 0;
|
|
|
|
if (dsl_dir_is_clone(ds->ds_dir)) {
|
|
dsl_dir_get_origin(ds->ds_dir, stat->dds_origin);
|
|
}
|
|
}
|
|
}
|
|
|
|
uint64_t
|
|
dsl_dataset_fsid_guid(dsl_dataset_t *ds)
|
|
{
|
|
return (ds->ds_fsid_guid);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_space(dsl_dataset_t *ds,
|
|
uint64_t *refdbytesp, uint64_t *availbytesp,
|
|
uint64_t *usedobjsp, uint64_t *availobjsp)
|
|
{
|
|
*refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes;
|
|
*availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE);
|
|
if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes)
|
|
*availbytesp +=
|
|
ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes;
|
|
if (ds->ds_quota != 0) {
|
|
/*
|
|
* Adjust available bytes according to refquota
|
|
*/
|
|
if (*refdbytesp < ds->ds_quota)
|
|
*availbytesp = MIN(*availbytesp,
|
|
ds->ds_quota - *refdbytesp);
|
|
else
|
|
*availbytesp = 0;
|
|
}
|
|
rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
|
|
*usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp);
|
|
rrw_exit(&ds->ds_bp_rwlock, FTAG);
|
|
*availobjsp = DN_MAX_OBJECT - *usedobjsp;
|
|
}
|
|
|
|
boolean_t
|
|
dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap)
|
|
{
|
|
dsl_pool_t *dp __maybe_unused = ds->ds_dir->dd_pool;
|
|
uint64_t birth;
|
|
|
|
ASSERT(dsl_pool_config_held(dp));
|
|
if (snap == NULL)
|
|
return (B_FALSE);
|
|
rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
|
|
birth = dsl_dataset_get_blkptr(ds)->blk_birth;
|
|
rrw_exit(&ds->ds_bp_rwlock, FTAG);
|
|
if (birth > dsl_dataset_phys(snap)->ds_creation_txg) {
|
|
objset_t *os, *os_snap;
|
|
/*
|
|
* It may be that only the ZIL differs, because it was
|
|
* reset in the head. Don't count that as being
|
|
* modified.
|
|
*/
|
|
if (dmu_objset_from_ds(ds, &os) != 0)
|
|
return (B_TRUE);
|
|
if (dmu_objset_from_ds(snap, &os_snap) != 0)
|
|
return (B_TRUE);
|
|
return (memcmp(&os->os_phys->os_meta_dnode,
|
|
&os_snap->os_phys->os_meta_dnode,
|
|
sizeof (os->os_phys->os_meta_dnode)) != 0);
|
|
}
|
|
return (B_FALSE);
|
|
}
|
|
|
|
static int
|
|
dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp,
|
|
dsl_dataset_t *hds, void *arg)
|
|
{
|
|
(void) dp;
|
|
dsl_dataset_rename_snapshot_arg_t *ddrsa = arg;
|
|
int error;
|
|
uint64_t val;
|
|
|
|
error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val);
|
|
if (error != 0) {
|
|
/* ignore nonexistent snapshots */
|
|
return (error == ENOENT ? 0 : error);
|
|
}
|
|
|
|
/* new name should not exist */
|
|
error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val);
|
|
if (error == 0)
|
|
error = SET_ERROR(EEXIST);
|
|
else if (error == ENOENT)
|
|
error = 0;
|
|
|
|
/* dataset name + 1 for the "@" + the new snapshot name must fit */
|
|
if (dsl_dir_namelen(hds->ds_dir) + 1 +
|
|
strlen(ddrsa->ddrsa_newsnapname) >= ZFS_MAX_DATASET_NAME_LEN)
|
|
error = SET_ERROR(ENAMETOOLONG);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_rename_snapshot_arg_t *ddrsa = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *hds;
|
|
int error;
|
|
|
|
error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
if (ddrsa->ddrsa_recursive) {
|
|
error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object,
|
|
dsl_dataset_rename_snapshot_check_impl, ddrsa,
|
|
DS_FIND_CHILDREN);
|
|
} else {
|
|
error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa);
|
|
}
|
|
dsl_dataset_rele(hds, FTAG);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp,
|
|
dsl_dataset_t *hds, void *arg)
|
|
{
|
|
dsl_dataset_rename_snapshot_arg_t *ddrsa = arg;
|
|
dsl_dataset_t *ds;
|
|
uint64_t val;
|
|
dmu_tx_t *tx = ddrsa->ddrsa_tx;
|
|
int error;
|
|
|
|
error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val);
|
|
ASSERT(error == 0 || error == ENOENT);
|
|
if (error == ENOENT) {
|
|
/* ignore nonexistent snapshots */
|
|
return (0);
|
|
}
|
|
|
|
VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds));
|
|
|
|
/* log before we change the name */
|
|
spa_history_log_internal_ds(ds, "rename", tx,
|
|
"-> @%s", ddrsa->ddrsa_newsnapname);
|
|
|
|
VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx,
|
|
B_FALSE));
|
|
mutex_enter(&ds->ds_lock);
|
|
(void) strlcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname,
|
|
sizeof (ds->ds_snapname));
|
|
mutex_exit(&ds->ds_lock);
|
|
VERIFY0(zap_add(dp->dp_meta_objset,
|
|
dsl_dataset_phys(hds)->ds_snapnames_zapobj,
|
|
ds->ds_snapname, 8, 1, &ds->ds_object, tx));
|
|
zvol_rename_minors(dp->dp_spa, ddrsa->ddrsa_oldsnapname,
|
|
ddrsa->ddrsa_newsnapname, B_TRUE);
|
|
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_rename_snapshot_arg_t *ddrsa = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *hds = NULL;
|
|
|
|
VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds));
|
|
ddrsa->ddrsa_tx = tx;
|
|
if (ddrsa->ddrsa_recursive) {
|
|
VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object,
|
|
dsl_dataset_rename_snapshot_sync_impl, ddrsa,
|
|
DS_FIND_CHILDREN));
|
|
} else {
|
|
VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa));
|
|
}
|
|
dsl_dataset_rele(hds, FTAG);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_rename_snapshot(const char *fsname,
|
|
const char *oldsnapname, const char *newsnapname, boolean_t recursive)
|
|
{
|
|
dsl_dataset_rename_snapshot_arg_t ddrsa;
|
|
|
|
ddrsa.ddrsa_fsname = fsname;
|
|
ddrsa.ddrsa_oldsnapname = oldsnapname;
|
|
ddrsa.ddrsa_newsnapname = newsnapname;
|
|
ddrsa.ddrsa_recursive = recursive;
|
|
|
|
return (dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check,
|
|
dsl_dataset_rename_snapshot_sync, &ddrsa,
|
|
1, ZFS_SPACE_CHECK_RESERVED));
|
|
}
|
|
|
|
/*
|
|
* If we're doing an ownership handoff, we need to make sure that there is
|
|
* only one long hold on the dataset. We're not allowed to change anything here
|
|
* so we don't permanently release the long hold or regular hold here. We want
|
|
* to do this only when syncing to avoid the dataset unexpectedly going away
|
|
* when we release the long hold.
|
|
*/
|
|
static int
|
|
dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx)
|
|
{
|
|
boolean_t held = B_FALSE;
|
|
|
|
if (!dmu_tx_is_syncing(tx))
|
|
return (0);
|
|
|
|
dsl_dir_t *dd = ds->ds_dir;
|
|
mutex_enter(&dd->dd_activity_lock);
|
|
uint64_t holds = zfs_refcount_count(&ds->ds_longholds) -
|
|
(owner != NULL ? 1 : 0);
|
|
/*
|
|
* The value of dd_activity_waiters can chance as soon as we drop the
|
|
* lock, but we're fine with that; new waiters coming in or old
|
|
* waiters leaving doesn't cause problems, since we're going to cancel
|
|
* waiters later anyway. The goal of this check is to verify that no
|
|
* non-waiters have long-holds, and all new long-holds will be
|
|
* prevented because we're holding the pool config as writer.
|
|
*/
|
|
if (holds != dd->dd_activity_waiters)
|
|
held = B_TRUE;
|
|
mutex_exit(&dd->dd_activity_lock);
|
|
|
|
if (held)
|
|
return (SET_ERROR(EBUSY));
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_rollback_arg_t *ddra = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *ds;
|
|
int64_t unused_refres_delta;
|
|
int error;
|
|
|
|
error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
/* must not be a snapshot */
|
|
if (ds->ds_is_snapshot) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (SET_ERROR(EINVAL));
|
|
}
|
|
|
|
/* must have a most recent snapshot */
|
|
if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (SET_ERROR(ESRCH));
|
|
}
|
|
|
|
/*
|
|
* No rollback to a snapshot created in the current txg, because
|
|
* the rollback may dirty the dataset and create blocks that are
|
|
* not reachable from the rootbp while having a birth txg that
|
|
* falls into the snapshot's range.
|
|
*/
|
|
if (dmu_tx_is_syncing(tx) &&
|
|
dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (SET_ERROR(EAGAIN));
|
|
}
|
|
|
|
/*
|
|
* If the expected target snapshot is specified, then check that
|
|
* the latest snapshot is it.
|
|
*/
|
|
if (ddra->ddra_tosnap != NULL) {
|
|
dsl_dataset_t *snapds;
|
|
|
|
/* Check if the target snapshot exists at all. */
|
|
error = dsl_dataset_hold(dp, ddra->ddra_tosnap, FTAG, &snapds);
|
|
if (error != 0) {
|
|
/*
|
|
* ESRCH is used to signal that the target snapshot does
|
|
* not exist, while ENOENT is used to report that
|
|
* the rolled back dataset does not exist.
|
|
* ESRCH is also used to cover other cases where the
|
|
* target snapshot is not related to the dataset being
|
|
* rolled back such as being in a different pool.
|
|
*/
|
|
if (error == ENOENT || error == EXDEV)
|
|
error = SET_ERROR(ESRCH);
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (error);
|
|
}
|
|
ASSERT(snapds->ds_is_snapshot);
|
|
|
|
/* Check if the snapshot is the latest snapshot indeed. */
|
|
if (snapds != ds->ds_prev) {
|
|
/*
|
|
* Distinguish between the case where the only problem
|
|
* is intervening snapshots (EEXIST) vs the snapshot
|
|
* not being a valid target for rollback (ESRCH).
|
|
*/
|
|
if (snapds->ds_dir == ds->ds_dir ||
|
|
(dsl_dir_is_clone(ds->ds_dir) &&
|
|
dsl_dir_phys(ds->ds_dir)->dd_origin_obj ==
|
|
snapds->ds_object)) {
|
|
error = SET_ERROR(EEXIST);
|
|
} else {
|
|
error = SET_ERROR(ESRCH);
|
|
}
|
|
dsl_dataset_rele(snapds, FTAG);
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (error);
|
|
}
|
|
dsl_dataset_rele(snapds, FTAG);
|
|
}
|
|
|
|
/* must not have any bookmarks after the most recent snapshot */
|
|
if (dsl_bookmark_latest_txg(ds) >
|
|
dsl_dataset_phys(ds)->ds_prev_snap_txg) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (SET_ERROR(EEXIST));
|
|
}
|
|
|
|
error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx);
|
|
if (error != 0) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check if the snap we are rolling back to uses more than
|
|
* the refquota.
|
|
*/
|
|
if (ds->ds_quota != 0 &&
|
|
dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (SET_ERROR(EDQUOT));
|
|
}
|
|
|
|
/*
|
|
* When we do the clone swap, we will temporarily use more space
|
|
* due to the refreservation (the head will no longer have any
|
|
* unique space, so the entire amount of the refreservation will need
|
|
* to be free). We will immediately destroy the clone, freeing
|
|
* this space, but the freeing happens over many txg's.
|
|
*/
|
|
unused_refres_delta = (int64_t)MIN(ds->ds_reserved,
|
|
dsl_dataset_phys(ds)->ds_unique_bytes);
|
|
|
|
if (unused_refres_delta > 0 &&
|
|
unused_refres_delta >
|
|
dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (SET_ERROR(ENOSPC));
|
|
}
|
|
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_rollback_arg_t *ddra = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *ds, *clone;
|
|
uint64_t cloneobj;
|
|
char namebuf[ZFS_MAX_DATASET_NAME_LEN];
|
|
|
|
VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds));
|
|
|
|
dsl_dataset_name(ds->ds_prev, namebuf);
|
|
fnvlist_add_string(ddra->ddra_result, "target", namebuf);
|
|
|
|
cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback",
|
|
ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, NULL, tx);
|
|
|
|
VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone));
|
|
|
|
dsl_dataset_clone_swap_sync_impl(clone, ds, tx);
|
|
dsl_dataset_zero_zil(ds, tx);
|
|
|
|
dsl_destroy_head_sync_impl(clone, tx);
|
|
|
|
dsl_dataset_rele(clone, FTAG);
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
|
|
/*
|
|
* Rolls back the given filesystem or volume to the most recent snapshot.
|
|
* The name of the most recent snapshot will be returned under key "target"
|
|
* in the result nvlist.
|
|
*
|
|
* If owner != NULL:
|
|
* - The existing dataset MUST be owned by the specified owner at entry
|
|
* - Upon return, dataset will still be held by the same owner, whether we
|
|
* succeed or not.
|
|
*
|
|
* This mode is required any time the existing filesystem is mounted. See
|
|
* notes above zfs_suspend_fs() for further details.
|
|
*/
|
|
int
|
|
dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner,
|
|
nvlist_t *result)
|
|
{
|
|
dsl_dataset_rollback_arg_t ddra;
|
|
|
|
ddra.ddra_fsname = fsname;
|
|
ddra.ddra_tosnap = tosnap;
|
|
ddra.ddra_owner = owner;
|
|
ddra.ddra_result = result;
|
|
|
|
return (dsl_sync_task(fsname, dsl_dataset_rollback_check,
|
|
dsl_dataset_rollback_sync, &ddra,
|
|
1, ZFS_SPACE_CHECK_RESERVED));
|
|
}
|
|
|
|
struct promotenode {
|
|
list_node_t link;
|
|
dsl_dataset_t *ds;
|
|
};
|
|
|
|
static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep);
|
|
static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp,
|
|
const void *tag);
|
|
static void promote_rele(dsl_dataset_promote_arg_t *ddpa, const void *tag);
|
|
|
|
int
|
|
dsl_dataset_promote_check(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_promote_arg_t *ddpa = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *hds;
|
|
struct promotenode *snap;
|
|
int err;
|
|
uint64_t unused;
|
|
uint64_t ss_mv_cnt;
|
|
size_t max_snap_len;
|
|
boolean_t conflicting_snaps;
|
|
|
|
err = promote_hold(ddpa, dp, FTAG);
|
|
if (err != 0)
|
|
return (err);
|
|
|
|
hds = ddpa->ddpa_clone;
|
|
max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1;
|
|
|
|
if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) {
|
|
promote_rele(ddpa, FTAG);
|
|
return (SET_ERROR(EXDEV));
|
|
}
|
|
|
|
snap = list_head(&ddpa->shared_snaps);
|
|
if (snap == NULL) {
|
|
err = SET_ERROR(ENOENT);
|
|
goto out;
|
|
}
|
|
dsl_dataset_t *const origin_ds = snap->ds;
|
|
|
|
/*
|
|
* Encrypted clones share a DSL Crypto Key with their origin's dsl dir.
|
|
* When doing a promote we must make sure the encryption root for
|
|
* both the target and the target's origin does not change to avoid
|
|
* needing to rewrap encryption keys
|
|
*/
|
|
err = dsl_dataset_promote_crypt_check(hds->ds_dir, origin_ds->ds_dir);
|
|
if (err != 0)
|
|
goto out;
|
|
|
|
/*
|
|
* Compute and check the amount of space to transfer. Since this is
|
|
* so expensive, don't do the preliminary check.
|
|
*/
|
|
if (!dmu_tx_is_syncing(tx)) {
|
|
promote_rele(ddpa, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
/* compute origin's new unique space */
|
|
snap = list_tail(&ddpa->clone_snaps);
|
|
ASSERT(snap != NULL);
|
|
ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==,
|
|
origin_ds->ds_object);
|
|
dsl_deadlist_space_range(&snap->ds->ds_deadlist,
|
|
dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX,
|
|
&ddpa->unique, &unused, &unused);
|
|
|
|
/*
|
|
* Walk the snapshots that we are moving
|
|
*
|
|
* Compute space to transfer. Consider the incremental changes
|
|
* to used by each snapshot:
|
|
* (my used) = (prev's used) + (blocks born) - (blocks killed)
|
|
* So each snapshot gave birth to:
|
|
* (blocks born) = (my used) - (prev's used) + (blocks killed)
|
|
* So a sequence would look like:
|
|
* (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0)
|
|
* Which simplifies to:
|
|
* uN + kN + kN-1 + ... + k1 + k0
|
|
* Note however, if we stop before we reach the ORIGIN we get:
|
|
* uN + kN + kN-1 + ... + kM - uM-1
|
|
*/
|
|
conflicting_snaps = B_FALSE;
|
|
ss_mv_cnt = 0;
|
|
ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes;
|
|
ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes;
|
|
ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes;
|
|
for (snap = list_head(&ddpa->shared_snaps); snap;
|
|
snap = list_next(&ddpa->shared_snaps, snap)) {
|
|
uint64_t val, dlused, dlcomp, dluncomp;
|
|
dsl_dataset_t *ds = snap->ds;
|
|
|
|
ss_mv_cnt++;
|
|
|
|
/*
|
|
* If there are long holds, we won't be able to evict
|
|
* the objset.
|
|
*/
|
|
if (dsl_dataset_long_held(ds)) {
|
|
err = SET_ERROR(EBUSY);
|
|
goto out;
|
|
}
|
|
|
|
/* Check that the snapshot name does not conflict */
|
|
VERIFY0(dsl_dataset_get_snapname(ds));
|
|
if (strlen(ds->ds_snapname) >= max_snap_len) {
|
|
err = SET_ERROR(ENAMETOOLONG);
|
|
goto out;
|
|
}
|
|
err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val);
|
|
if (err == 0) {
|
|
fnvlist_add_boolean(ddpa->err_ds,
|
|
snap->ds->ds_snapname);
|
|
conflicting_snaps = B_TRUE;
|
|
} else if (err != ENOENT) {
|
|
goto out;
|
|
}
|
|
|
|
/* The very first snapshot does not have a deadlist */
|
|
if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0)
|
|
continue;
|
|
|
|
dsl_deadlist_space(&ds->ds_deadlist,
|
|
&dlused, &dlcomp, &dluncomp);
|
|
ddpa->used += dlused;
|
|
ddpa->comp += dlcomp;
|
|
ddpa->uncomp += dluncomp;
|
|
}
|
|
|
|
/*
|
|
* Check that bookmarks that are being transferred don't have
|
|
* name conflicts.
|
|
*/
|
|
for (dsl_bookmark_node_t *dbn = avl_first(&origin_ds->ds_bookmarks);
|
|
dbn != NULL && dbn->dbn_phys.zbm_creation_txg <=
|
|
dsl_dataset_phys(origin_ds)->ds_creation_txg;
|
|
dbn = AVL_NEXT(&origin_ds->ds_bookmarks, dbn)) {
|
|
if (strlen(dbn->dbn_name) >= max_snap_len) {
|
|
err = SET_ERROR(ENAMETOOLONG);
|
|
goto out;
|
|
}
|
|
zfs_bookmark_phys_t bm;
|
|
err = dsl_bookmark_lookup_impl(ddpa->ddpa_clone,
|
|
dbn->dbn_name, &bm);
|
|
|
|
if (err == 0) {
|
|
fnvlist_add_boolean(ddpa->err_ds, dbn->dbn_name);
|
|
conflicting_snaps = B_TRUE;
|
|
} else if (err == ESRCH) {
|
|
err = 0;
|
|
}
|
|
if (err != 0) {
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* In order to return the full list of conflicting snapshots, we check
|
|
* whether there was a conflict after traversing all of them.
|
|
*/
|
|
if (conflicting_snaps) {
|
|
err = SET_ERROR(EEXIST);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* If we are a clone of a clone then we never reached ORIGIN,
|
|
* so we need to subtract out the clone origin's used space.
|
|
*/
|
|
if (ddpa->origin_origin) {
|
|
ddpa->used -=
|
|
dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes;
|
|
ddpa->comp -=
|
|
dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes;
|
|
ddpa->uncomp -=
|
|
dsl_dataset_phys(ddpa->origin_origin)->
|
|
ds_uncompressed_bytes;
|
|
}
|
|
|
|
/* Check that there is enough space and limit headroom here */
|
|
err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir,
|
|
0, ss_mv_cnt, ddpa->used, ddpa->cr, ddpa->proc);
|
|
if (err != 0)
|
|
goto out;
|
|
|
|
/*
|
|
* Compute the amounts of space that will be used by snapshots
|
|
* after the promotion (for both origin and clone). For each,
|
|
* it is the amount of space that will be on all of their
|
|
* deadlists (that was not born before their new origin).
|
|
*/
|
|
if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) {
|
|
uint64_t space;
|
|
|
|
/*
|
|
* Note, typically this will not be a clone of a clone,
|
|
* so dd_origin_txg will be < TXG_INITIAL, so
|
|
* these snaplist_space() -> dsl_deadlist_space_range()
|
|
* calls will be fast because they do not have to
|
|
* iterate over all bps.
|
|
*/
|
|
snap = list_head(&ddpa->origin_snaps);
|
|
if (snap == NULL) {
|
|
err = SET_ERROR(ENOENT);
|
|
goto out;
|
|
}
|
|
err = snaplist_space(&ddpa->shared_snaps,
|
|
snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap);
|
|
if (err != 0)
|
|
goto out;
|
|
|
|
err = snaplist_space(&ddpa->clone_snaps,
|
|
snap->ds->ds_dir->dd_origin_txg, &space);
|
|
if (err != 0)
|
|
goto out;
|
|
ddpa->cloneusedsnap += space;
|
|
}
|
|
if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags &
|
|
DD_FLAG_USED_BREAKDOWN) {
|
|
err = snaplist_space(&ddpa->origin_snaps,
|
|
dsl_dataset_phys(origin_ds)->ds_creation_txg,
|
|
&ddpa->originusedsnap);
|
|
if (err != 0)
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
promote_rele(ddpa, FTAG);
|
|
return (err);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_promote_arg_t *ddpa = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *hds;
|
|
struct promotenode *snap;
|
|
dsl_dataset_t *origin_ds;
|
|
dsl_dataset_t *origin_head;
|
|
dsl_dir_t *dd;
|
|
dsl_dir_t *odd = NULL;
|
|
uint64_t oldnext_obj;
|
|
int64_t delta;
|
|
|
|
ASSERT(nvlist_empty(ddpa->err_ds));
|
|
|
|
VERIFY0(promote_hold(ddpa, dp, FTAG));
|
|
hds = ddpa->ddpa_clone;
|
|
|
|
ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE);
|
|
|
|
snap = list_head(&ddpa->shared_snaps);
|
|
origin_ds = snap->ds;
|
|
dd = hds->ds_dir;
|
|
|
|
snap = list_head(&ddpa->origin_snaps);
|
|
origin_head = snap->ds;
|
|
|
|
/*
|
|
* We need to explicitly open odd, since origin_ds's dd will be
|
|
* changing.
|
|
*/
|
|
VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object,
|
|
NULL, FTAG, &odd));
|
|
|
|
dsl_dataset_promote_crypt_sync(hds->ds_dir, odd, tx);
|
|
|
|
/* change origin's next snap */
|
|
dmu_buf_will_dirty(origin_ds->ds_dbuf, tx);
|
|
oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj;
|
|
snap = list_tail(&ddpa->clone_snaps);
|
|
ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==,
|
|
origin_ds->ds_object);
|
|
dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object;
|
|
|
|
/* change the origin's next clone */
|
|
if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) {
|
|
dsl_dataset_remove_from_next_clones(origin_ds,
|
|
snap->ds->ds_object, tx);
|
|
VERIFY0(zap_add_int(dp->dp_meta_objset,
|
|
dsl_dataset_phys(origin_ds)->ds_next_clones_obj,
|
|
oldnext_obj, tx));
|
|
}
|
|
|
|
/* change origin */
|
|
dmu_buf_will_dirty(dd->dd_dbuf, tx);
|
|
ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object);
|
|
dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj;
|
|
dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg;
|
|
dmu_buf_will_dirty(odd->dd_dbuf, tx);
|
|
dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object;
|
|
origin_head->ds_dir->dd_origin_txg =
|
|
dsl_dataset_phys(origin_ds)->ds_creation_txg;
|
|
|
|
/* change dd_clone entries */
|
|
if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) {
|
|
VERIFY0(zap_remove_int(dp->dp_meta_objset,
|
|
dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx));
|
|
VERIFY0(zap_add_int(dp->dp_meta_objset,
|
|
dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones,
|
|
hds->ds_object, tx));
|
|
|
|
VERIFY0(zap_remove_int(dp->dp_meta_objset,
|
|
dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones,
|
|
origin_head->ds_object, tx));
|
|
if (dsl_dir_phys(dd)->dd_clones == 0) {
|
|
dsl_dir_phys(dd)->dd_clones =
|
|
zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES,
|
|
DMU_OT_NONE, 0, tx);
|
|
}
|
|
VERIFY0(zap_add_int(dp->dp_meta_objset,
|
|
dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx));
|
|
}
|
|
|
|
/*
|
|
* Move bookmarks to this dir.
|
|
*/
|
|
dsl_bookmark_node_t *dbn_next;
|
|
for (dsl_bookmark_node_t *dbn = avl_first(&origin_head->ds_bookmarks);
|
|
dbn != NULL && dbn->dbn_phys.zbm_creation_txg <=
|
|
dsl_dataset_phys(origin_ds)->ds_creation_txg;
|
|
dbn = dbn_next) {
|
|
dbn_next = AVL_NEXT(&origin_head->ds_bookmarks, dbn);
|
|
|
|
avl_remove(&origin_head->ds_bookmarks, dbn);
|
|
VERIFY0(zap_remove(dp->dp_meta_objset,
|
|
origin_head->ds_bookmarks_obj, dbn->dbn_name, tx));
|
|
|
|
dsl_bookmark_node_add(hds, dbn, tx);
|
|
}
|
|
|
|
dsl_bookmark_next_changed(hds, origin_ds, tx);
|
|
|
|
/* move snapshots to this dir */
|
|
for (snap = list_head(&ddpa->shared_snaps); snap;
|
|
snap = list_next(&ddpa->shared_snaps, snap)) {
|
|
dsl_dataset_t *ds = snap->ds;
|
|
|
|
/*
|
|
* Property callbacks are registered to a particular
|
|
* dsl_dir. Since ours is changing, evict the objset
|
|
* so that they will be unregistered from the old dsl_dir.
|
|
*/
|
|
if (ds->ds_objset) {
|
|
dmu_objset_evict(ds->ds_objset);
|
|
ds->ds_objset = NULL;
|
|
}
|
|
|
|
/* move snap name entry */
|
|
VERIFY0(dsl_dataset_get_snapname(ds));
|
|
VERIFY0(dsl_dataset_snap_remove(origin_head,
|
|
ds->ds_snapname, tx, B_TRUE));
|
|
VERIFY0(zap_add(dp->dp_meta_objset,
|
|
dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname,
|
|
8, 1, &ds->ds_object, tx));
|
|
dsl_fs_ss_count_adjust(hds->ds_dir, 1,
|
|
DD_FIELD_SNAPSHOT_COUNT, tx);
|
|
|
|
/* change containing dsl_dir */
|
|
dmu_buf_will_dirty(ds->ds_dbuf, tx);
|
|
ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object);
|
|
dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object;
|
|
ASSERT3P(ds->ds_dir, ==, odd);
|
|
dsl_dir_rele(ds->ds_dir, ds);
|
|
VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object,
|
|
NULL, ds, &ds->ds_dir));
|
|
|
|
/* move any clone references */
|
|
if (dsl_dataset_phys(ds)->ds_next_clones_obj &&
|
|
spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) {
|
|
zap_cursor_t zc;
|
|
zap_attribute_t za;
|
|
|
|
for (zap_cursor_init(&zc, dp->dp_meta_objset,
|
|
dsl_dataset_phys(ds)->ds_next_clones_obj);
|
|
zap_cursor_retrieve(&zc, &za) == 0;
|
|
zap_cursor_advance(&zc)) {
|
|
dsl_dataset_t *cnds;
|
|
uint64_t o;
|
|
|
|
if (za.za_first_integer == oldnext_obj) {
|
|
/*
|
|
* We've already moved the
|
|
* origin's reference.
|
|
*/
|
|
continue;
|
|
}
|
|
|
|
VERIFY0(dsl_dataset_hold_obj(dp,
|
|
za.za_first_integer, FTAG, &cnds));
|
|
o = dsl_dir_phys(cnds->ds_dir)->
|
|
dd_head_dataset_obj;
|
|
|
|
VERIFY0(zap_remove_int(dp->dp_meta_objset,
|
|
dsl_dir_phys(odd)->dd_clones, o, tx));
|
|
VERIFY0(zap_add_int(dp->dp_meta_objset,
|
|
dsl_dir_phys(dd)->dd_clones, o, tx));
|
|
dsl_dataset_rele(cnds, FTAG);
|
|
}
|
|
zap_cursor_fini(&zc);
|
|
}
|
|
|
|
ASSERT(!dsl_prop_hascb(ds));
|
|
}
|
|
|
|
/*
|
|
* Change space accounting.
|
|
* Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either
|
|
* both be valid, or both be 0 (resulting in delta == 0). This
|
|
* is true for each of {clone,origin} independently.
|
|
*/
|
|
|
|
delta = ddpa->cloneusedsnap -
|
|
dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP];
|
|
ASSERT3S(delta, >=, 0);
|
|
ASSERT3U(ddpa->used, >=, delta);
|
|
dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx);
|
|
dsl_dir_diduse_space(dd, DD_USED_HEAD,
|
|
ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx);
|
|
|
|
delta = ddpa->originusedsnap -
|
|
dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP];
|
|
ASSERT3S(delta, <=, 0);
|
|
ASSERT3U(ddpa->used, >=, -delta);
|
|
dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx);
|
|
dsl_dir_diduse_space(odd, DD_USED_HEAD,
|
|
-ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx);
|
|
|
|
dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique;
|
|
|
|
/*
|
|
* Since livelists are specific to a clone's origin txg, they
|
|
* are no longer accurate. Destroy the livelist from the clone being
|
|
* promoted. If the origin dataset is a clone, destroy its livelist
|
|
* as well.
|
|
*/
|
|
dsl_dir_remove_livelist(dd, tx, B_TRUE);
|
|
dsl_dir_remove_livelist(odd, tx, B_TRUE);
|
|
|
|
/* log history record */
|
|
spa_history_log_internal_ds(hds, "promote", tx, " ");
|
|
|
|
dsl_dir_rele(odd, FTAG);
|
|
promote_rele(ddpa, FTAG);
|
|
|
|
/*
|
|
* Transfer common error blocks from old head to new head.
|
|
*/
|
|
if (spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_HEAD_ERRLOG)) {
|
|
uint64_t old_head = origin_head->ds_object;
|
|
uint64_t new_head = hds->ds_object;
|
|
spa_swap_errlog(dp->dp_spa, new_head, old_head, tx);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Make a list of dsl_dataset_t's for the snapshots between first_obj
|
|
* (exclusive) and last_obj (inclusive). The list will be in reverse
|
|
* order (last_obj will be the list_head()). If first_obj == 0, do all
|
|
* snapshots back to this dataset's origin.
|
|
*/
|
|
static int
|
|
snaplist_make(dsl_pool_t *dp,
|
|
uint64_t first_obj, uint64_t last_obj, list_t *l, const void *tag)
|
|
{
|
|
uint64_t obj = last_obj;
|
|
|
|
list_create(l, sizeof (struct promotenode),
|
|
offsetof(struct promotenode, link));
|
|
|
|
while (obj != first_obj) {
|
|
dsl_dataset_t *ds;
|
|
struct promotenode *snap;
|
|
int err;
|
|
|
|
err = dsl_dataset_hold_obj(dp, obj, tag, &ds);
|
|
ASSERT(err != ENOENT);
|
|
if (err != 0)
|
|
return (err);
|
|
|
|
if (first_obj == 0)
|
|
first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj;
|
|
|
|
snap = kmem_alloc(sizeof (*snap), KM_SLEEP);
|
|
snap->ds = ds;
|
|
list_insert_tail(l, snap);
|
|
obj = dsl_dataset_phys(ds)->ds_prev_snap_obj;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep)
|
|
{
|
|
struct promotenode *snap;
|
|
|
|
*spacep = 0;
|
|
for (snap = list_head(l); snap; snap = list_next(l, snap)) {
|
|
uint64_t used, comp, uncomp;
|
|
dsl_deadlist_space_range(&snap->ds->ds_deadlist,
|
|
mintxg, UINT64_MAX, &used, &comp, &uncomp);
|
|
*spacep += used;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
snaplist_destroy(list_t *l, const void *tag)
|
|
{
|
|
struct promotenode *snap;
|
|
|
|
if (l == NULL || !list_link_active(&l->list_head))
|
|
return;
|
|
|
|
while ((snap = list_tail(l)) != NULL) {
|
|
list_remove(l, snap);
|
|
dsl_dataset_rele(snap->ds, tag);
|
|
kmem_free(snap, sizeof (*snap));
|
|
}
|
|
list_destroy(l);
|
|
}
|
|
|
|
static int
|
|
promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, const void *tag)
|
|
{
|
|
int error;
|
|
dsl_dir_t *dd;
|
|
struct promotenode *snap;
|
|
|
|
error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag,
|
|
&ddpa->ddpa_clone);
|
|
if (error != 0)
|
|
return (error);
|
|
dd = ddpa->ddpa_clone->ds_dir;
|
|
|
|
if (ddpa->ddpa_clone->ds_is_snapshot ||
|
|
!dsl_dir_is_clone(dd)) {
|
|
dsl_dataset_rele(ddpa->ddpa_clone, tag);
|
|
return (SET_ERROR(EINVAL));
|
|
}
|
|
|
|
error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj,
|
|
&ddpa->shared_snaps, tag);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object,
|
|
&ddpa->clone_snaps, tag);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
snap = list_head(&ddpa->shared_snaps);
|
|
ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj);
|
|
error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj,
|
|
dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj,
|
|
&ddpa->origin_snaps, tag);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) {
|
|
error = dsl_dataset_hold_obj(dp,
|
|
dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj,
|
|
tag, &ddpa->origin_origin);
|
|
if (error != 0)
|
|
goto out;
|
|
}
|
|
out:
|
|
if (error != 0)
|
|
promote_rele(ddpa, tag);
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
promote_rele(dsl_dataset_promote_arg_t *ddpa, const void *tag)
|
|
{
|
|
snaplist_destroy(&ddpa->shared_snaps, tag);
|
|
snaplist_destroy(&ddpa->clone_snaps, tag);
|
|
snaplist_destroy(&ddpa->origin_snaps, tag);
|
|
if (ddpa->origin_origin != NULL)
|
|
dsl_dataset_rele(ddpa->origin_origin, tag);
|
|
dsl_dataset_rele(ddpa->ddpa_clone, tag);
|
|
}
|
|
|
|
/*
|
|
* Promote a clone.
|
|
*
|
|
* If it fails due to a conflicting snapshot name, "conflsnap" will be filled
|
|
* in with the name. (It must be at least ZFS_MAX_DATASET_NAME_LEN bytes long.)
|
|
*/
|
|
int
|
|
dsl_dataset_promote(const char *name, char *conflsnap)
|
|
{
|
|
dsl_dataset_promote_arg_t ddpa = { 0 };
|
|
uint64_t numsnaps;
|
|
int error;
|
|
nvpair_t *snap_pair;
|
|
objset_t *os;
|
|
|
|
/*
|
|
* We will modify space proportional to the number of
|
|
* snapshots. Compute numsnaps.
|
|
*/
|
|
error = dmu_objset_hold(name, FTAG, &os);
|
|
if (error != 0)
|
|
return (error);
|
|
error = zap_count(dmu_objset_pool(os)->dp_meta_objset,
|
|
dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj,
|
|
&numsnaps);
|
|
dmu_objset_rele(os, FTAG);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
ddpa.ddpa_clonename = name;
|
|
ddpa.err_ds = fnvlist_alloc();
|
|
ddpa.cr = CRED();
|
|
ddpa.proc = curproc;
|
|
|
|
error = dsl_sync_task(name, dsl_dataset_promote_check,
|
|
dsl_dataset_promote_sync, &ddpa,
|
|
2 + numsnaps, ZFS_SPACE_CHECK_RESERVED);
|
|
|
|
/*
|
|
* Return the first conflicting snapshot found.
|
|
*/
|
|
snap_pair = nvlist_next_nvpair(ddpa.err_ds, NULL);
|
|
if (snap_pair != NULL && conflsnap != NULL)
|
|
(void) strlcpy(conflsnap, nvpair_name(snap_pair),
|
|
ZFS_MAX_DATASET_NAME_LEN);
|
|
|
|
fnvlist_free(ddpa.err_ds);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
|
|
dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx)
|
|
{
|
|
/*
|
|
* "slack" factor for received datasets with refquota set on them.
|
|
* See the bottom of this function for details on its use.
|
|
*/
|
|
uint64_t refquota_slack = (uint64_t)DMU_MAX_ACCESS *
|
|
spa_asize_inflation;
|
|
int64_t unused_refres_delta;
|
|
|
|
/* they should both be heads */
|
|
if (clone->ds_is_snapshot ||
|
|
origin_head->ds_is_snapshot)
|
|
return (SET_ERROR(EINVAL));
|
|
|
|
/* if we are not forcing, the branch point should be just before them */
|
|
if (!force && clone->ds_prev != origin_head->ds_prev)
|
|
return (SET_ERROR(EINVAL));
|
|
|
|
/* clone should be the clone (unless they are unrelated) */
|
|
if (clone->ds_prev != NULL &&
|
|
clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap &&
|
|
origin_head->ds_dir != clone->ds_prev->ds_dir)
|
|
return (SET_ERROR(EINVAL));
|
|
|
|
/* the clone should be a child of the origin */
|
|
if (clone->ds_dir->dd_parent != origin_head->ds_dir)
|
|
return (SET_ERROR(EINVAL));
|
|
|
|
/* origin_head shouldn't be modified unless 'force' */
|
|
if (!force &&
|
|
dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev))
|
|
return (SET_ERROR(ETXTBSY));
|
|
|
|
/* origin_head should have no long holds (e.g. is not mounted) */
|
|
if (dsl_dataset_handoff_check(origin_head, owner, tx))
|
|
return (SET_ERROR(EBUSY));
|
|
|
|
/* check amount of any unconsumed refreservation */
|
|
unused_refres_delta =
|
|
(int64_t)MIN(origin_head->ds_reserved,
|
|
dsl_dataset_phys(origin_head)->ds_unique_bytes) -
|
|
(int64_t)MIN(origin_head->ds_reserved,
|
|
dsl_dataset_phys(clone)->ds_unique_bytes);
|
|
|
|
if (unused_refres_delta > 0 &&
|
|
unused_refres_delta >
|
|
dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE))
|
|
return (SET_ERROR(ENOSPC));
|
|
|
|
/*
|
|
* The clone can't be too much over the head's refquota.
|
|
*
|
|
* To ensure that the entire refquota can be used, we allow one
|
|
* transaction to exceed the refquota. Therefore, this check
|
|
* needs to also allow for the space referenced to be more than the
|
|
* refquota. The maximum amount of space that one transaction can use
|
|
* on disk is DMU_MAX_ACCESS * spa_asize_inflation. Allowing this
|
|
* overage ensures that we are able to receive a filesystem that
|
|
* exceeds the refquota on the source system.
|
|
*
|
|
* So that overage is the refquota_slack we use below.
|
|
*/
|
|
if (origin_head->ds_quota != 0 &&
|
|
dsl_dataset_phys(clone)->ds_referenced_bytes >
|
|
origin_head->ds_quota + refquota_slack)
|
|
return (SET_ERROR(EDQUOT));
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
dsl_dataset_swap_remap_deadlists(dsl_dataset_t *clone,
|
|
dsl_dataset_t *origin, dmu_tx_t *tx)
|
|
{
|
|
uint64_t clone_remap_dl_obj, origin_remap_dl_obj;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
|
|
ASSERT(dsl_pool_sync_context(dp));
|
|
|
|
clone_remap_dl_obj = dsl_dataset_get_remap_deadlist_object(clone);
|
|
origin_remap_dl_obj = dsl_dataset_get_remap_deadlist_object(origin);
|
|
|
|
if (clone_remap_dl_obj != 0) {
|
|
dsl_deadlist_close(&clone->ds_remap_deadlist);
|
|
dsl_dataset_unset_remap_deadlist_object(clone, tx);
|
|
}
|
|
if (origin_remap_dl_obj != 0) {
|
|
dsl_deadlist_close(&origin->ds_remap_deadlist);
|
|
dsl_dataset_unset_remap_deadlist_object(origin, tx);
|
|
}
|
|
|
|
if (clone_remap_dl_obj != 0) {
|
|
dsl_dataset_set_remap_deadlist_object(origin,
|
|
clone_remap_dl_obj, tx);
|
|
dsl_deadlist_open(&origin->ds_remap_deadlist,
|
|
dp->dp_meta_objset, clone_remap_dl_obj);
|
|
}
|
|
if (origin_remap_dl_obj != 0) {
|
|
dsl_dataset_set_remap_deadlist_object(clone,
|
|
origin_remap_dl_obj, tx);
|
|
dsl_deadlist_open(&clone->ds_remap_deadlist,
|
|
dp->dp_meta_objset, origin_remap_dl_obj);
|
|
}
|
|
}
|
|
|
|
void
|
|
dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
|
|
dsl_dataset_t *origin_head, dmu_tx_t *tx)
|
|
{
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
int64_t unused_refres_delta;
|
|
|
|
ASSERT(clone->ds_reserved == 0);
|
|
/*
|
|
* NOTE: On DEBUG kernels there could be a race between this and
|
|
* the check function if spa_asize_inflation is adjusted...
|
|
*/
|
|
ASSERT(origin_head->ds_quota == 0 ||
|
|
dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota +
|
|
DMU_MAX_ACCESS * spa_asize_inflation);
|
|
ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev);
|
|
|
|
dsl_dir_cancel_waiters(origin_head->ds_dir);
|
|
|
|
/*
|
|
* Swap per-dataset feature flags.
|
|
*/
|
|
for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
|
|
if (!(spa_feature_table[f].fi_flags &
|
|
ZFEATURE_FLAG_PER_DATASET)) {
|
|
ASSERT(!dsl_dataset_feature_is_active(clone, f));
|
|
ASSERT(!dsl_dataset_feature_is_active(origin_head, f));
|
|
continue;
|
|
}
|
|
|
|
boolean_t clone_inuse = dsl_dataset_feature_is_active(clone, f);
|
|
void *clone_feature = clone->ds_feature[f];
|
|
boolean_t origin_head_inuse =
|
|
dsl_dataset_feature_is_active(origin_head, f);
|
|
void *origin_head_feature = origin_head->ds_feature[f];
|
|
|
|
if (clone_inuse)
|
|
dsl_dataset_deactivate_feature_impl(clone, f, tx);
|
|
if (origin_head_inuse)
|
|
dsl_dataset_deactivate_feature_impl(origin_head, f, tx);
|
|
|
|
if (clone_inuse) {
|
|
dsl_dataset_activate_feature(origin_head->ds_object, f,
|
|
clone_feature, tx);
|
|
origin_head->ds_feature[f] = clone_feature;
|
|
}
|
|
if (origin_head_inuse) {
|
|
dsl_dataset_activate_feature(clone->ds_object, f,
|
|
origin_head_feature, tx);
|
|
clone->ds_feature[f] = origin_head_feature;
|
|
}
|
|
}
|
|
|
|
dmu_buf_will_dirty(clone->ds_dbuf, tx);
|
|
dmu_buf_will_dirty(origin_head->ds_dbuf, tx);
|
|
|
|
if (clone->ds_objset != NULL) {
|
|
dmu_objset_evict(clone->ds_objset);
|
|
clone->ds_objset = NULL;
|
|
}
|
|
|
|
if (origin_head->ds_objset != NULL) {
|
|
dmu_objset_evict(origin_head->ds_objset);
|
|
origin_head->ds_objset = NULL;
|
|
}
|
|
|
|
unused_refres_delta =
|
|
(int64_t)MIN(origin_head->ds_reserved,
|
|
dsl_dataset_phys(origin_head)->ds_unique_bytes) -
|
|
(int64_t)MIN(origin_head->ds_reserved,
|
|
dsl_dataset_phys(clone)->ds_unique_bytes);
|
|
|
|
/*
|
|
* Reset origin's unique bytes.
|
|
*/
|
|
{
|
|
dsl_dataset_t *origin = clone->ds_prev;
|
|
uint64_t comp, uncomp;
|
|
|
|
dmu_buf_will_dirty(origin->ds_dbuf, tx);
|
|
dsl_deadlist_space_range(&clone->ds_deadlist,
|
|
dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX,
|
|
&dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp);
|
|
}
|
|
|
|
/* swap blkptrs */
|
|
{
|
|
rrw_enter(&clone->ds_bp_rwlock, RW_WRITER, FTAG);
|
|
rrw_enter(&origin_head->ds_bp_rwlock, RW_WRITER, FTAG);
|
|
blkptr_t tmp;
|
|
tmp = dsl_dataset_phys(origin_head)->ds_bp;
|
|
dsl_dataset_phys(origin_head)->ds_bp =
|
|
dsl_dataset_phys(clone)->ds_bp;
|
|
dsl_dataset_phys(clone)->ds_bp = tmp;
|
|
rrw_exit(&origin_head->ds_bp_rwlock, FTAG);
|
|
rrw_exit(&clone->ds_bp_rwlock, FTAG);
|
|
}
|
|
|
|
/* set dd_*_bytes */
|
|
{
|
|
int64_t dused, dcomp, duncomp;
|
|
uint64_t cdl_used, cdl_comp, cdl_uncomp;
|
|
uint64_t odl_used, odl_comp, odl_uncomp;
|
|
|
|
ASSERT3U(dsl_dir_phys(clone->ds_dir)->
|
|
dd_used_breakdown[DD_USED_SNAP], ==, 0);
|
|
|
|
dsl_deadlist_space(&clone->ds_deadlist,
|
|
&cdl_used, &cdl_comp, &cdl_uncomp);
|
|
dsl_deadlist_space(&origin_head->ds_deadlist,
|
|
&odl_used, &odl_comp, &odl_uncomp);
|
|
|
|
dused = dsl_dataset_phys(clone)->ds_referenced_bytes +
|
|
cdl_used -
|
|
(dsl_dataset_phys(origin_head)->ds_referenced_bytes +
|
|
odl_used);
|
|
dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes +
|
|
cdl_comp -
|
|
(dsl_dataset_phys(origin_head)->ds_compressed_bytes +
|
|
odl_comp);
|
|
duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes +
|
|
cdl_uncomp -
|
|
(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes +
|
|
odl_uncomp);
|
|
|
|
dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD,
|
|
dused, dcomp, duncomp, tx);
|
|
dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD,
|
|
-dused, -dcomp, -duncomp, tx);
|
|
|
|
/*
|
|
* The difference in the space used by snapshots is the
|
|
* difference in snapshot space due to the head's
|
|
* deadlist (since that's the only thing that's
|
|
* changing that affects the snapused).
|
|
*/
|
|
dsl_deadlist_space_range(&clone->ds_deadlist,
|
|
origin_head->ds_dir->dd_origin_txg, UINT64_MAX,
|
|
&cdl_used, &cdl_comp, &cdl_uncomp);
|
|
dsl_deadlist_space_range(&origin_head->ds_deadlist,
|
|
origin_head->ds_dir->dd_origin_txg, UINT64_MAX,
|
|
&odl_used, &odl_comp, &odl_uncomp);
|
|
dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used,
|
|
DD_USED_HEAD, DD_USED_SNAP, tx);
|
|
}
|
|
|
|
/* swap ds_*_bytes */
|
|
SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes,
|
|
dsl_dataset_phys(clone)->ds_referenced_bytes);
|
|
SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes,
|
|
dsl_dataset_phys(clone)->ds_compressed_bytes);
|
|
SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes,
|
|
dsl_dataset_phys(clone)->ds_uncompressed_bytes);
|
|
SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes,
|
|
dsl_dataset_phys(clone)->ds_unique_bytes);
|
|
|
|
/* apply any parent delta for change in unconsumed refreservation */
|
|
dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV,
|
|
unused_refres_delta, 0, 0, tx);
|
|
|
|
/*
|
|
* Swap deadlists.
|
|
*/
|
|
dsl_deadlist_close(&clone->ds_deadlist);
|
|
dsl_deadlist_close(&origin_head->ds_deadlist);
|
|
SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj,
|
|
dsl_dataset_phys(clone)->ds_deadlist_obj);
|
|
dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset,
|
|
dsl_dataset_phys(clone)->ds_deadlist_obj);
|
|
dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset,
|
|
dsl_dataset_phys(origin_head)->ds_deadlist_obj);
|
|
dsl_dataset_swap_remap_deadlists(clone, origin_head, tx);
|
|
|
|
/*
|
|
* If there is a bookmark at the origin, its "next dataset" is
|
|
* changing, so we need to reset its FBN.
|
|
*/
|
|
dsl_bookmark_next_changed(origin_head, origin_head->ds_prev, tx);
|
|
|
|
dsl_scan_ds_clone_swapped(origin_head, clone, tx);
|
|
|
|
/*
|
|
* Destroy any livelists associated with the clone or the origin,
|
|
* since after the swap the corresponding livelists are no longer
|
|
* valid.
|
|
*/
|
|
dsl_dir_remove_livelist(clone->ds_dir, tx, B_TRUE);
|
|
dsl_dir_remove_livelist(origin_head->ds_dir, tx, B_TRUE);
|
|
|
|
spa_history_log_internal_ds(clone, "clone swap", tx,
|
|
"parent=%s", origin_head->ds_dir->dd_myname);
|
|
}
|
|
|
|
/*
|
|
* Given a pool name and a dataset object number in that pool,
|
|
* return the name of that dataset.
|
|
*/
|
|
int
|
|
dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf)
|
|
{
|
|
dsl_pool_t *dp;
|
|
dsl_dataset_t *ds;
|
|
int error;
|
|
|
|
error = dsl_pool_hold(pname, FTAG, &dp);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds);
|
|
if (error == 0) {
|
|
dsl_dataset_name(ds, buf);
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
dsl_pool_rele(dp, FTAG);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
|
|
uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv)
|
|
{
|
|
int error = 0;
|
|
|
|
ASSERT3S(asize, >, 0);
|
|
|
|
/*
|
|
* *ref_rsrv is the portion of asize that will come from any
|
|
* unconsumed refreservation space.
|
|
*/
|
|
*ref_rsrv = 0;
|
|
|
|
mutex_enter(&ds->ds_lock);
|
|
/*
|
|
* Make a space adjustment for reserved bytes.
|
|
*/
|
|
if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) {
|
|
ASSERT3U(*used, >=,
|
|
ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes);
|
|
*used -=
|
|
(ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes);
|
|
*ref_rsrv =
|
|
asize - MIN(asize, parent_delta(ds, asize + inflight));
|
|
}
|
|
|
|
if (!check_quota || ds->ds_quota == 0) {
|
|
mutex_exit(&ds->ds_lock);
|
|
return (0);
|
|
}
|
|
/*
|
|
* If they are requesting more space, and our current estimate
|
|
* is over quota, they get to try again unless the actual
|
|
* on-disk is over quota and there are no pending changes (which
|
|
* may free up space for us).
|
|
*/
|
|
if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >=
|
|
ds->ds_quota) {
|
|
if (inflight > 0 ||
|
|
dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota)
|
|
error = SET_ERROR(ERESTART);
|
|
else
|
|
error = SET_ERROR(EDQUOT);
|
|
}
|
|
mutex_exit(&ds->ds_lock);
|
|
|
|
return (error);
|
|
}
|
|
|
|
typedef struct dsl_dataset_set_qr_arg {
|
|
const char *ddsqra_name;
|
|
zprop_source_t ddsqra_source;
|
|
uint64_t ddsqra_value;
|
|
} dsl_dataset_set_qr_arg_t;
|
|
|
|
|
|
static int
|
|
dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_set_qr_arg_t *ddsqra = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *ds;
|
|
int error;
|
|
uint64_t newval;
|
|
|
|
if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA)
|
|
return (SET_ERROR(ENOTSUP));
|
|
|
|
error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
if (ds->ds_is_snapshot) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (SET_ERROR(EINVAL));
|
|
}
|
|
|
|
error = dsl_prop_predict(ds->ds_dir,
|
|
zfs_prop_to_name(ZFS_PROP_REFQUOTA),
|
|
ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval);
|
|
if (error != 0) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (error);
|
|
}
|
|
|
|
if (newval == 0) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes ||
|
|
newval < ds->ds_reserved) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (SET_ERROR(ENOSPC));
|
|
}
|
|
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_set_qr_arg_t *ddsqra = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *ds = NULL;
|
|
uint64_t newval;
|
|
|
|
VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds));
|
|
|
|
dsl_prop_set_sync_impl(ds,
|
|
zfs_prop_to_name(ZFS_PROP_REFQUOTA),
|
|
ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1,
|
|
&ddsqra->ddsqra_value, tx);
|
|
|
|
VERIFY0(dsl_prop_get_int_ds(ds,
|
|
zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval));
|
|
|
|
if (ds->ds_quota != newval) {
|
|
dmu_buf_will_dirty(ds->ds_dbuf, tx);
|
|
ds->ds_quota = newval;
|
|
}
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
|
|
uint64_t refquota)
|
|
{
|
|
dsl_dataset_set_qr_arg_t ddsqra;
|
|
|
|
ddsqra.ddsqra_name = dsname;
|
|
ddsqra.ddsqra_source = source;
|
|
ddsqra.ddsqra_value = refquota;
|
|
|
|
return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check,
|
|
dsl_dataset_set_refquota_sync, &ddsqra, 0,
|
|
ZFS_SPACE_CHECK_EXTRA_RESERVED));
|
|
}
|
|
|
|
static int
|
|
dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_set_qr_arg_t *ddsqra = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *ds;
|
|
int error;
|
|
uint64_t newval, unique;
|
|
|
|
if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION)
|
|
return (SET_ERROR(ENOTSUP));
|
|
|
|
error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
if (ds->ds_is_snapshot) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (SET_ERROR(EINVAL));
|
|
}
|
|
|
|
error = dsl_prop_predict(ds->ds_dir,
|
|
zfs_prop_to_name(ZFS_PROP_REFRESERVATION),
|
|
ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval);
|
|
if (error != 0) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* If we are doing the preliminary check in open context, the
|
|
* space estimates may be inaccurate.
|
|
*/
|
|
if (!dmu_tx_is_syncing(tx)) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
mutex_enter(&ds->ds_lock);
|
|
if (!DS_UNIQUE_IS_ACCURATE(ds))
|
|
dsl_dataset_recalc_head_uniq(ds);
|
|
unique = dsl_dataset_phys(ds)->ds_unique_bytes;
|
|
mutex_exit(&ds->ds_lock);
|
|
|
|
if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) {
|
|
uint64_t delta = MAX(unique, newval) -
|
|
MAX(unique, ds->ds_reserved);
|
|
|
|
if (delta >
|
|
dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) ||
|
|
(ds->ds_quota > 0 && newval > ds->ds_quota)) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (SET_ERROR(ENOSPC));
|
|
}
|
|
}
|
|
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
|
|
zprop_source_t source, uint64_t value, dmu_tx_t *tx)
|
|
{
|
|
uint64_t newval;
|
|
uint64_t unique;
|
|
int64_t delta;
|
|
|
|
dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION),
|
|
source, sizeof (value), 1, &value, tx);
|
|
|
|
VERIFY0(dsl_prop_get_int_ds(ds,
|
|
zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval));
|
|
|
|
dmu_buf_will_dirty(ds->ds_dbuf, tx);
|
|
mutex_enter(&ds->ds_dir->dd_lock);
|
|
mutex_enter(&ds->ds_lock);
|
|
ASSERT(DS_UNIQUE_IS_ACCURATE(ds));
|
|
unique = dsl_dataset_phys(ds)->ds_unique_bytes;
|
|
delta = MAX(0, (int64_t)(newval - unique)) -
|
|
MAX(0, (int64_t)(ds->ds_reserved - unique));
|
|
ds->ds_reserved = newval;
|
|
mutex_exit(&ds->ds_lock);
|
|
|
|
dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx);
|
|
mutex_exit(&ds->ds_dir->dd_lock);
|
|
}
|
|
|
|
static void
|
|
dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_set_qr_arg_t *ddsqra = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *ds = NULL;
|
|
|
|
VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds));
|
|
dsl_dataset_set_refreservation_sync_impl(ds,
|
|
ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx);
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
|
|
uint64_t refreservation)
|
|
{
|
|
dsl_dataset_set_qr_arg_t ddsqra;
|
|
|
|
ddsqra.ddsqra_name = dsname;
|
|
ddsqra.ddsqra_source = source;
|
|
ddsqra.ddsqra_value = refreservation;
|
|
|
|
return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check,
|
|
dsl_dataset_set_refreservation_sync, &ddsqra, 0,
|
|
ZFS_SPACE_CHECK_EXTRA_RESERVED));
|
|
}
|
|
|
|
typedef struct dsl_dataset_set_compression_arg {
|
|
const char *ddsca_name;
|
|
zprop_source_t ddsca_source;
|
|
uint64_t ddsca_value;
|
|
} dsl_dataset_set_compression_arg_t;
|
|
|
|
static int
|
|
dsl_dataset_set_compression_check(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_set_compression_arg_t *ddsca = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
|
|
uint64_t compval = ZIO_COMPRESS_ALGO(ddsca->ddsca_value);
|
|
spa_feature_t f = zio_compress_to_feature(compval);
|
|
|
|
if (f == SPA_FEATURE_NONE)
|
|
return (SET_ERROR(EINVAL));
|
|
|
|
if (!spa_feature_is_enabled(dp->dp_spa, f))
|
|
return (SET_ERROR(ENOTSUP));
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
dsl_dataset_set_compression_sync(void *arg, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_set_compression_arg_t *ddsca = arg;
|
|
dsl_pool_t *dp = dmu_tx_pool(tx);
|
|
dsl_dataset_t *ds = NULL;
|
|
|
|
uint64_t compval = ZIO_COMPRESS_ALGO(ddsca->ddsca_value);
|
|
spa_feature_t f = zio_compress_to_feature(compval);
|
|
ASSERT3S(f, !=, SPA_FEATURE_NONE);
|
|
ASSERT3S(spa_feature_table[f].fi_type, ==, ZFEATURE_TYPE_BOOLEAN);
|
|
|
|
VERIFY0(dsl_dataset_hold(dp, ddsca->ddsca_name, FTAG, &ds));
|
|
if (zfeature_active(f, ds->ds_feature[f]) != B_TRUE) {
|
|
ds->ds_feature_activation[f] = (void *)B_TRUE;
|
|
dsl_dataset_activate_feature(ds->ds_object, f,
|
|
ds->ds_feature_activation[f], tx);
|
|
ds->ds_feature[f] = ds->ds_feature_activation[f];
|
|
}
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
|
|
int
|
|
dsl_dataset_set_compression(const char *dsname, zprop_source_t source,
|
|
uint64_t compression)
|
|
{
|
|
dsl_dataset_set_compression_arg_t ddsca;
|
|
|
|
/*
|
|
* The sync task is only required for zstd in order to activate
|
|
* the feature flag when the property is first set.
|
|
*/
|
|
if (ZIO_COMPRESS_ALGO(compression) != ZIO_COMPRESS_ZSTD)
|
|
return (0);
|
|
|
|
ddsca.ddsca_name = dsname;
|
|
ddsca.ddsca_source = source;
|
|
ddsca.ddsca_value = compression;
|
|
|
|
return (dsl_sync_task(dsname, dsl_dataset_set_compression_check,
|
|
dsl_dataset_set_compression_sync, &ddsca, 0,
|
|
ZFS_SPACE_CHECK_EXTRA_RESERVED));
|
|
}
|
|
|
|
/*
|
|
* Return (in *usedp) the amount of space referenced by "new" that was not
|
|
* referenced at the time the bookmark corresponds to. "New" may be a
|
|
* snapshot or a head. The bookmark must be before new, in
|
|
* new's filesystem (or its origin) -- caller verifies this.
|
|
*
|
|
* The written space is calculated by considering two components: First, we
|
|
* ignore any freed space, and calculate the written as new's used space
|
|
* minus old's used space. Next, we add in the amount of space that was freed
|
|
* between the two time points, thus reducing new's used space relative to
|
|
* old's. Specifically, this is the space that was born before
|
|
* zbm_creation_txg, and freed before new (ie. on new's deadlist or a
|
|
* previous deadlist).
|
|
*
|
|
* space freed [---------------------]
|
|
* snapshots ---O-------O--------O-------O------
|
|
* bookmark new
|
|
*
|
|
* Note, the bookmark's zbm_*_bytes_refd must be valid, but if the HAS_FBN
|
|
* flag is not set, we will calculate the freed_before_next based on the
|
|
* next snapshot's deadlist, rather than using zbm_*_freed_before_next_snap.
|
|
*/
|
|
static int
|
|
dsl_dataset_space_written_impl(zfs_bookmark_phys_t *bmp,
|
|
dsl_dataset_t *new, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp)
|
|
{
|
|
int err = 0;
|
|
dsl_pool_t *dp = new->ds_dir->dd_pool;
|
|
|
|
ASSERT(dsl_pool_config_held(dp));
|
|
if (dsl_dataset_is_snapshot(new)) {
|
|
ASSERT3U(bmp->zbm_creation_txg, <,
|
|
dsl_dataset_phys(new)->ds_creation_txg);
|
|
}
|
|
|
|
*usedp = 0;
|
|
*usedp += dsl_dataset_phys(new)->ds_referenced_bytes;
|
|
*usedp -= bmp->zbm_referenced_bytes_refd;
|
|
|
|
*compp = 0;
|
|
*compp += dsl_dataset_phys(new)->ds_compressed_bytes;
|
|
*compp -= bmp->zbm_compressed_bytes_refd;
|
|
|
|
*uncompp = 0;
|
|
*uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes;
|
|
*uncompp -= bmp->zbm_uncompressed_bytes_refd;
|
|
|
|
dsl_dataset_t *snap = new;
|
|
|
|
while (dsl_dataset_phys(snap)->ds_prev_snap_txg >
|
|
bmp->zbm_creation_txg) {
|
|
uint64_t used, comp, uncomp;
|
|
|
|
dsl_deadlist_space_range(&snap->ds_deadlist,
|
|
0, bmp->zbm_creation_txg,
|
|
&used, &comp, &uncomp);
|
|
*usedp += used;
|
|
*compp += comp;
|
|
*uncompp += uncomp;
|
|
|
|
uint64_t snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj;
|
|
if (snap != new)
|
|
dsl_dataset_rele(snap, FTAG);
|
|
err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap);
|
|
if (err != 0)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* We might not have the FBN if we are calculating written from
|
|
* a snapshot (because we didn't know the correct "next" snapshot
|
|
* until now).
|
|
*/
|
|
if (bmp->zbm_flags & ZBM_FLAG_HAS_FBN) {
|
|
*usedp += bmp->zbm_referenced_freed_before_next_snap;
|
|
*compp += bmp->zbm_compressed_freed_before_next_snap;
|
|
*uncompp += bmp->zbm_uncompressed_freed_before_next_snap;
|
|
} else {
|
|
ASSERT3U(dsl_dataset_phys(snap)->ds_prev_snap_txg, ==,
|
|
bmp->zbm_creation_txg);
|
|
uint64_t used, comp, uncomp;
|
|
dsl_deadlist_space(&snap->ds_deadlist, &used, &comp, &uncomp);
|
|
*usedp += used;
|
|
*compp += comp;
|
|
*uncompp += uncomp;
|
|
}
|
|
if (snap != new)
|
|
dsl_dataset_rele(snap, FTAG);
|
|
return (err);
|
|
}
|
|
|
|
/*
|
|
* Return (in *usedp) the amount of space written in new that was not
|
|
* present at the time the bookmark corresponds to. New may be a
|
|
* snapshot or the head. Old must be a bookmark before new, in
|
|
* new's filesystem (or its origin) -- caller verifies this.
|
|
*/
|
|
int
|
|
dsl_dataset_space_written_bookmark(zfs_bookmark_phys_t *bmp,
|
|
dsl_dataset_t *new, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp)
|
|
{
|
|
if (!(bmp->zbm_flags & ZBM_FLAG_HAS_FBN))
|
|
return (SET_ERROR(ENOTSUP));
|
|
return (dsl_dataset_space_written_impl(bmp, new,
|
|
usedp, compp, uncompp));
|
|
}
|
|
|
|
/*
|
|
* Return (in *usedp) the amount of space written in new that is not
|
|
* present in oldsnap. New may be a snapshot or the head. Old must be
|
|
* a snapshot before new, in new's filesystem (or its origin). If not then
|
|
* fail and return EINVAL.
|
|
*/
|
|
int
|
|
dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new,
|
|
uint64_t *usedp, uint64_t *compp, uint64_t *uncompp)
|
|
{
|
|
if (!dsl_dataset_is_before(new, oldsnap, 0))
|
|
return (SET_ERROR(EINVAL));
|
|
|
|
zfs_bookmark_phys_t zbm = { 0 };
|
|
dsl_dataset_phys_t *dsp = dsl_dataset_phys(oldsnap);
|
|
zbm.zbm_guid = dsp->ds_guid;
|
|
zbm.zbm_creation_txg = dsp->ds_creation_txg;
|
|
zbm.zbm_creation_time = dsp->ds_creation_time;
|
|
zbm.zbm_referenced_bytes_refd = dsp->ds_referenced_bytes;
|
|
zbm.zbm_compressed_bytes_refd = dsp->ds_compressed_bytes;
|
|
zbm.zbm_uncompressed_bytes_refd = dsp->ds_uncompressed_bytes;
|
|
|
|
/*
|
|
* If oldsnap is the origin (or origin's origin, ...) of new,
|
|
* we can't easily calculate the effective FBN. Therefore,
|
|
* we do not set ZBM_FLAG_HAS_FBN, so that the _impl will calculate
|
|
* it relative to the correct "next": the next snapshot towards "new",
|
|
* rather than the next snapshot in oldsnap's dsl_dir.
|
|
*/
|
|
return (dsl_dataset_space_written_impl(&zbm, new,
|
|
usedp, compp, uncompp));
|
|
}
|
|
|
|
/*
|
|
* Return (in *usedp) the amount of space that will be reclaimed if firstsnap,
|
|
* lastsnap, and all snapshots in between are deleted.
|
|
*
|
|
* blocks that would be freed [---------------------------]
|
|
* snapshots ---O-------O--------O-------O--------O
|
|
* firstsnap lastsnap
|
|
*
|
|
* This is the set of blocks that were born after the snap before firstsnap,
|
|
* (birth > firstsnap->prev_snap_txg) and died before the snap after the
|
|
* last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist).
|
|
* We calculate this by iterating over the relevant deadlists (from the snap
|
|
* after lastsnap, backward to the snap after firstsnap), summing up the
|
|
* space on the deadlist that was born after the snap before firstsnap.
|
|
*/
|
|
int
|
|
dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap,
|
|
dsl_dataset_t *lastsnap,
|
|
uint64_t *usedp, uint64_t *compp, uint64_t *uncompp)
|
|
{
|
|
int err = 0;
|
|
uint64_t snapobj;
|
|
dsl_pool_t *dp = firstsnap->ds_dir->dd_pool;
|
|
|
|
ASSERT(firstsnap->ds_is_snapshot);
|
|
ASSERT(lastsnap->ds_is_snapshot);
|
|
|
|
/*
|
|
* Check that the snapshots are in the same dsl_dir, and firstsnap
|
|
* is before lastsnap.
|
|
*/
|
|
if (firstsnap->ds_dir != lastsnap->ds_dir ||
|
|
dsl_dataset_phys(firstsnap)->ds_creation_txg >
|
|
dsl_dataset_phys(lastsnap)->ds_creation_txg)
|
|
return (SET_ERROR(EINVAL));
|
|
|
|
*usedp = *compp = *uncompp = 0;
|
|
|
|
snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj;
|
|
while (snapobj != firstsnap->ds_object) {
|
|
dsl_dataset_t *ds;
|
|
uint64_t used, comp, uncomp;
|
|
|
|
err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds);
|
|
if (err != 0)
|
|
break;
|
|
|
|
dsl_deadlist_space_range(&ds->ds_deadlist,
|
|
dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX,
|
|
&used, &comp, &uncomp);
|
|
*usedp += used;
|
|
*compp += comp;
|
|
*uncompp += uncomp;
|
|
|
|
snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj;
|
|
ASSERT3U(snapobj, !=, 0);
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
return (err);
|
|
}
|
|
|
|
/*
|
|
* Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline.
|
|
* For example, they could both be snapshots of the same filesystem, and
|
|
* 'earlier' is before 'later'. Or 'earlier' could be the origin of
|
|
* 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's
|
|
* filesystem. Or 'earlier' could be the origin's origin.
|
|
*
|
|
* If non-zero, earlier_txg is used instead of earlier's ds_creation_txg.
|
|
*/
|
|
boolean_t
|
|
dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier,
|
|
uint64_t earlier_txg)
|
|
{
|
|
dsl_pool_t *dp = later->ds_dir->dd_pool;
|
|
int error;
|
|
boolean_t ret;
|
|
|
|
ASSERT(dsl_pool_config_held(dp));
|
|
ASSERT(earlier->ds_is_snapshot || earlier_txg != 0);
|
|
|
|
if (earlier_txg == 0)
|
|
earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg;
|
|
|
|
if (later->ds_is_snapshot &&
|
|
earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg)
|
|
return (B_FALSE);
|
|
|
|
if (later->ds_dir == earlier->ds_dir)
|
|
return (B_TRUE);
|
|
|
|
/*
|
|
* We check dd_origin_obj explicitly here rather than using
|
|
* dsl_dir_is_clone() so that we will return TRUE if "earlier"
|
|
* is $ORIGIN@$ORIGIN. dsl_dataset_space_written() depends on
|
|
* this behavior.
|
|
*/
|
|
if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == 0)
|
|
return (B_FALSE);
|
|
|
|
dsl_dataset_t *origin;
|
|
error = dsl_dataset_hold_obj(dp,
|
|
dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin);
|
|
if (error != 0)
|
|
return (B_FALSE);
|
|
if (dsl_dataset_phys(origin)->ds_creation_txg == earlier_txg &&
|
|
origin->ds_dir == earlier->ds_dir) {
|
|
dsl_dataset_rele(origin, FTAG);
|
|
return (B_TRUE);
|
|
}
|
|
ret = dsl_dataset_is_before(origin, earlier, earlier_txg);
|
|
dsl_dataset_rele(origin, FTAG);
|
|
return (ret);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx)
|
|
{
|
|
objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
|
|
dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx);
|
|
}
|
|
|
|
boolean_t
|
|
dsl_dataset_is_zapified(dsl_dataset_t *ds)
|
|
{
|
|
dmu_object_info_t doi;
|
|
|
|
dmu_object_info_from_db(ds->ds_dbuf, &doi);
|
|
return (doi.doi_type == DMU_OTN_ZAP_METADATA);
|
|
}
|
|
|
|
boolean_t
|
|
dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds)
|
|
{
|
|
return (dsl_dataset_is_zapified(ds) &&
|
|
zap_contains(ds->ds_dir->dd_pool->dp_meta_objset,
|
|
ds->ds_object, DS_FIELD_RESUME_TOGUID) == 0);
|
|
}
|
|
|
|
uint64_t
|
|
dsl_dataset_get_remap_deadlist_object(dsl_dataset_t *ds)
|
|
{
|
|
uint64_t remap_deadlist_obj;
|
|
int err;
|
|
|
|
if (!dsl_dataset_is_zapified(ds))
|
|
return (0);
|
|
|
|
err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_REMAP_DEADLIST, sizeof (remap_deadlist_obj), 1,
|
|
&remap_deadlist_obj);
|
|
|
|
if (err != 0) {
|
|
VERIFY3S(err, ==, ENOENT);
|
|
return (0);
|
|
}
|
|
|
|
ASSERT(remap_deadlist_obj != 0);
|
|
return (remap_deadlist_obj);
|
|
}
|
|
|
|
boolean_t
|
|
dsl_dataset_remap_deadlist_exists(dsl_dataset_t *ds)
|
|
{
|
|
EQUIV(dsl_deadlist_is_open(&ds->ds_remap_deadlist),
|
|
dsl_dataset_get_remap_deadlist_object(ds) != 0);
|
|
return (dsl_deadlist_is_open(&ds->ds_remap_deadlist));
|
|
}
|
|
|
|
static void
|
|
dsl_dataset_set_remap_deadlist_object(dsl_dataset_t *ds, uint64_t obj,
|
|
dmu_tx_t *tx)
|
|
{
|
|
ASSERT(obj != 0);
|
|
dsl_dataset_zapify(ds, tx);
|
|
VERIFY0(zap_add(ds->ds_dir->dd_pool->dp_meta_objset, ds->ds_object,
|
|
DS_FIELD_REMAP_DEADLIST, sizeof (obj), 1, &obj, tx));
|
|
}
|
|
|
|
static void
|
|
dsl_dataset_unset_remap_deadlist_object(dsl_dataset_t *ds, dmu_tx_t *tx)
|
|
{
|
|
VERIFY0(zap_remove(ds->ds_dir->dd_pool->dp_meta_objset,
|
|
ds->ds_object, DS_FIELD_REMAP_DEADLIST, tx));
|
|
}
|
|
|
|
void
|
|
dsl_dataset_destroy_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx)
|
|
{
|
|
uint64_t remap_deadlist_object;
|
|
spa_t *spa = ds->ds_dir->dd_pool->dp_spa;
|
|
|
|
ASSERT(dmu_tx_is_syncing(tx));
|
|
ASSERT(dsl_dataset_remap_deadlist_exists(ds));
|
|
|
|
remap_deadlist_object = ds->ds_remap_deadlist.dl_object;
|
|
dsl_deadlist_close(&ds->ds_remap_deadlist);
|
|
dsl_deadlist_free(spa_meta_objset(spa), remap_deadlist_object, tx);
|
|
dsl_dataset_unset_remap_deadlist_object(ds, tx);
|
|
spa_feature_decr(spa, SPA_FEATURE_OBSOLETE_COUNTS, tx);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_create_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx)
|
|
{
|
|
uint64_t remap_deadlist_obj;
|
|
spa_t *spa = ds->ds_dir->dd_pool->dp_spa;
|
|
|
|
ASSERT(dmu_tx_is_syncing(tx));
|
|
ASSERT(MUTEX_HELD(&ds->ds_remap_deadlist_lock));
|
|
/*
|
|
* Currently we only create remap deadlists when there are indirect
|
|
* vdevs with referenced mappings.
|
|
*/
|
|
ASSERT(spa_feature_is_active(spa, SPA_FEATURE_DEVICE_REMOVAL));
|
|
|
|
remap_deadlist_obj = dsl_deadlist_clone(
|
|
&ds->ds_deadlist, UINT64_MAX,
|
|
dsl_dataset_phys(ds)->ds_prev_snap_obj, tx);
|
|
dsl_dataset_set_remap_deadlist_object(ds,
|
|
remap_deadlist_obj, tx);
|
|
dsl_deadlist_open(&ds->ds_remap_deadlist, spa_meta_objset(spa),
|
|
remap_deadlist_obj);
|
|
spa_feature_incr(spa, SPA_FEATURE_OBSOLETE_COUNTS, tx);
|
|
}
|
|
|
|
void
|
|
dsl_dataset_activate_redaction(dsl_dataset_t *ds, uint64_t *redact_snaps,
|
|
uint64_t num_redact_snaps, dmu_tx_t *tx)
|
|
{
|
|
uint64_t dsobj = ds->ds_object;
|
|
struct feature_type_uint64_array_arg *ftuaa =
|
|
kmem_zalloc(sizeof (*ftuaa), KM_SLEEP);
|
|
ftuaa->length = (int64_t)num_redact_snaps;
|
|
if (num_redact_snaps > 0) {
|
|
ftuaa->array = kmem_alloc(num_redact_snaps * sizeof (uint64_t),
|
|
KM_SLEEP);
|
|
memcpy(ftuaa->array, redact_snaps, num_redact_snaps *
|
|
sizeof (uint64_t));
|
|
}
|
|
dsl_dataset_activate_feature(dsobj, SPA_FEATURE_REDACTED_DATASETS,
|
|
ftuaa, tx);
|
|
ds->ds_feature[SPA_FEATURE_REDACTED_DATASETS] = ftuaa;
|
|
}
|
|
|
|
/*
|
|
* Find and return (in *oldest_dsobj) the oldest snapshot of the dsobj
|
|
* dataset whose birth time is >= min_txg.
|
|
*/
|
|
int
|
|
dsl_dataset_oldest_snapshot(spa_t *spa, uint64_t head_ds, uint64_t min_txg,
|
|
uint64_t *oldest_dsobj)
|
|
{
|
|
dsl_dataset_t *ds;
|
|
dsl_pool_t *dp = spa->spa_dsl_pool;
|
|
|
|
int error = dsl_dataset_hold_obj(dp, head_ds, FTAG, &ds);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
uint64_t prev_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj;
|
|
uint64_t prev_obj_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg;
|
|
|
|
while (prev_obj != 0 && min_txg < prev_obj_txg) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
if ((error = dsl_dataset_hold_obj(dp, prev_obj,
|
|
FTAG, &ds)) != 0)
|
|
return (error);
|
|
prev_obj_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg;
|
|
prev_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj;
|
|
}
|
|
*oldest_dsobj = ds->ds_object;
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
ZFS_MODULE_PARAM(zfs, zfs_, max_recordsize, UINT, ZMOD_RW,
|
|
"Max allowed record size");
|
|
|
|
ZFS_MODULE_PARAM(zfs, zfs_, allow_redacted_dataset_mount, INT, ZMOD_RW,
|
|
"Allow mounting of redacted datasets");
|
|
|
|
ZFS_MODULE_PARAM(zfs, zfs_, snapshot_history_enabled, INT, ZMOD_RW,
|
|
"Include snapshot events in pool history/events");
|
|
|
|
EXPORT_SYMBOL(dsl_dataset_hold);
|
|
EXPORT_SYMBOL(dsl_dataset_hold_flags);
|
|
EXPORT_SYMBOL(dsl_dataset_hold_obj);
|
|
EXPORT_SYMBOL(dsl_dataset_hold_obj_flags);
|
|
EXPORT_SYMBOL(dsl_dataset_own);
|
|
EXPORT_SYMBOL(dsl_dataset_own_obj);
|
|
EXPORT_SYMBOL(dsl_dataset_name);
|
|
EXPORT_SYMBOL(dsl_dataset_rele);
|
|
EXPORT_SYMBOL(dsl_dataset_rele_flags);
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EXPORT_SYMBOL(dsl_dataset_disown);
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EXPORT_SYMBOL(dsl_dataset_tryown);
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EXPORT_SYMBOL(dsl_dataset_create_sync);
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EXPORT_SYMBOL(dsl_dataset_create_sync_dd);
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EXPORT_SYMBOL(dsl_dataset_snapshot_check);
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EXPORT_SYMBOL(dsl_dataset_snapshot_sync);
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EXPORT_SYMBOL(dsl_dataset_promote);
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EXPORT_SYMBOL(dsl_dataset_user_hold);
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EXPORT_SYMBOL(dsl_dataset_user_release);
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EXPORT_SYMBOL(dsl_dataset_get_holds);
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EXPORT_SYMBOL(dsl_dataset_get_blkptr);
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EXPORT_SYMBOL(dsl_dataset_get_spa);
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EXPORT_SYMBOL(dsl_dataset_modified_since_snap);
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EXPORT_SYMBOL(dsl_dataset_space_written);
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EXPORT_SYMBOL(dsl_dataset_space_wouldfree);
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EXPORT_SYMBOL(dsl_dataset_sync);
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EXPORT_SYMBOL(dsl_dataset_block_born);
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EXPORT_SYMBOL(dsl_dataset_block_kill);
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EXPORT_SYMBOL(dsl_dataset_dirty);
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EXPORT_SYMBOL(dsl_dataset_stats);
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EXPORT_SYMBOL(dsl_dataset_fast_stat);
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EXPORT_SYMBOL(dsl_dataset_space);
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EXPORT_SYMBOL(dsl_dataset_fsid_guid);
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EXPORT_SYMBOL(dsl_dsobj_to_dsname);
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EXPORT_SYMBOL(dsl_dataset_check_quota);
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EXPORT_SYMBOL(dsl_dataset_clone_swap_check_impl);
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EXPORT_SYMBOL(dsl_dataset_clone_swap_sync_impl);
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