1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 225afc78aaSChris Kirby * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 2342fcb65eSMatthew Ahrens * Copyright (c) 2011, 2014 by Delphix. All rights reserved. 24a2afb611SJerry Jelinek * Copyright (c) 2014, Joyent, Inc. All rights reserved. 2503d1795fSAlexander Stetsenko * Copyright (c) 2014 RackTop Systems. 26*bc9014e6SJustin Gibbs * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 27fa9e4066Sahrens */ 28fa9e4066Sahrens 29fa9e4066Sahrens #include <sys/dmu_objset.h> 30fa9e4066Sahrens #include <sys/dsl_dataset.h> 31fa9e4066Sahrens #include <sys/dsl_dir.h> 3299653d4eSeschrock #include <sys/dsl_prop.h> 331d452cf5Sahrens #include <sys/dsl_synctask.h> 34fa9e4066Sahrens #include <sys/dmu_traverse.h> 354e3c9f44SBill Pijewski #include <sys/dmu_impl.h> 36fa9e4066Sahrens #include <sys/dmu_tx.h> 37fa9e4066Sahrens #include <sys/arc.h> 38fa9e4066Sahrens #include <sys/zio.h> 39fa9e4066Sahrens #include <sys/zap.h> 40ad135b5dSChristopher Siden #include <sys/zfeature.h> 41fa9e4066Sahrens #include <sys/unique.h> 42fa9e4066Sahrens #include <sys/zfs_context.h> 43cdf5b4caSmmusante #include <sys/zfs_ioctl.h> 44ecd6cf80Smarks #include <sys/spa.h> 45088f3894Sahrens #include <sys/zfs_znode.h> 46c99e4bdcSChris Kirby #include <sys/zfs_onexit.h> 47842727c2SChris Kirby #include <sys/zvol.h> 483f9d6ad7SLin Ling #include <sys/dsl_scan.h> 49cde58dbcSMatthew Ahrens #include <sys/dsl_deadlist.h> 503b2aab18SMatthew Ahrens #include <sys/dsl_destroy.h> 513b2aab18SMatthew Ahrens #include <sys/dsl_userhold.h> 5278f17100SMatthew Ahrens #include <sys/dsl_bookmark.h> 53e1930233Sbonwick 54b5152584SMatthew Ahrens /* 55b5152584SMatthew Ahrens * The SPA supports block sizes up to 16MB. However, very large blocks 56b5152584SMatthew Ahrens * can have an impact on i/o latency (e.g. tying up a spinning disk for 57b5152584SMatthew Ahrens * ~300ms), and also potentially on the memory allocator. Therefore, 58b5152584SMatthew Ahrens * we do not allow the recordsize to be set larger than zfs_max_recordsize 59b5152584SMatthew Ahrens * (default 1MB). Larger blocks can be created by changing this tunable, 60b5152584SMatthew Ahrens * and pools with larger blocks can always be imported and used, regardless 61b5152584SMatthew Ahrens * of this setting. 62b5152584SMatthew Ahrens */ 63b5152584SMatthew Ahrens int zfs_max_recordsize = 1 * 1024 * 1024; 64b5152584SMatthew Ahrens 65cde58dbcSMatthew Ahrens #define SWITCH64(x, y) \ 66cde58dbcSMatthew Ahrens { \ 67cde58dbcSMatthew Ahrens uint64_t __tmp = (x); \ 68cde58dbcSMatthew Ahrens (x) = (y); \ 69cde58dbcSMatthew Ahrens (y) = __tmp; \ 70cde58dbcSMatthew Ahrens } 71cde58dbcSMatthew Ahrens 7255434c77Sek #define DS_REF_MAX (1ULL << 62) 73fa9e4066Sahrens 74c1379625SJustin T. Gibbs extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); 75c1379625SJustin T. Gibbs 76a9799022Sck /* 77a9799022Sck * Figure out how much of this delta should be propogated to the dsl_dir 78a9799022Sck * layer. If there's a refreservation, that space has already been 79a9799022Sck * partially accounted for in our ancestors. 80a9799022Sck */ 81a9799022Sck static int64_t 82a9799022Sck parent_delta(dsl_dataset_t *ds, int64_t delta) 83a9799022Sck { 84c1379625SJustin T. Gibbs dsl_dataset_phys_t *ds_phys; 85a9799022Sck uint64_t old_bytes, new_bytes; 86a9799022Sck 87a9799022Sck if (ds->ds_reserved == 0) 88a9799022Sck return (delta); 89a9799022Sck 90c1379625SJustin T. Gibbs ds_phys = dsl_dataset_phys(ds); 91c1379625SJustin T. Gibbs old_bytes = MAX(ds_phys->ds_unique_bytes, ds->ds_reserved); 92c1379625SJustin T. Gibbs new_bytes = MAX(ds_phys->ds_unique_bytes + delta, ds->ds_reserved); 93a9799022Sck 94a9799022Sck ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); 95a9799022Sck return (new_bytes - old_bytes); 96a9799022Sck } 97fa9e4066Sahrens 98fa9e4066Sahrens void 99b24ab676SJeff Bonwick dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) 100fa9e4066Sahrens { 101b24ab676SJeff Bonwick int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); 102fa9e4066Sahrens int compressed = BP_GET_PSIZE(bp); 103fa9e4066Sahrens int uncompressed = BP_GET_UCSIZE(bp); 104a9799022Sck int64_t delta; 105fa9e4066Sahrens 1063f9d6ad7SLin Ling dprintf_bp(bp, "ds=%p", ds); 107fa9e4066Sahrens 108fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 109fa9e4066Sahrens /* It could have been compressed away to nothing */ 110fa9e4066Sahrens if (BP_IS_HOLE(bp)) 111fa9e4066Sahrens return; 112fa9e4066Sahrens ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); 113ad135b5dSChristopher Siden ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp))); 114fa9e4066Sahrens if (ds == NULL) { 115ce636f8bSMatthew Ahrens dsl_pool_mos_diduse_space(tx->tx_pool, 116ce636f8bSMatthew Ahrens used, compressed, uncompressed); 117fa9e4066Sahrens return; 118fa9e4066Sahrens } 1193f9d6ad7SLin Ling 120b62969f8SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 121fa9e4066Sahrens mutex_enter(&ds->ds_lock); 122a9799022Sck delta = parent_delta(ds, used); 123c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes += used; 124c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; 125c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; 126c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes += used; 127b5152584SMatthew Ahrens if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) 128b5152584SMatthew Ahrens ds->ds_need_large_blocks = B_TRUE; 129fa9e4066Sahrens mutex_exit(&ds->ds_lock); 13074e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, 13174e7dc98SMatthew Ahrens compressed, uncompressed, tx); 13274e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, used - delta, 13374e7dc98SMatthew Ahrens DD_USED_REFRSRV, DD_USED_HEAD, tx); 134fa9e4066Sahrens } 135fa9e4066Sahrens 136cdb0ab79Smaybee int 137b24ab676SJeff Bonwick dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, 138b24ab676SJeff Bonwick boolean_t async) 139fa9e4066Sahrens { 14043466aaeSMax Grossman int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); 14143466aaeSMax Grossman int compressed = BP_GET_PSIZE(bp); 14243466aaeSMax Grossman int uncompressed = BP_GET_UCSIZE(bp); 14343466aaeSMax Grossman 144fa9e4066Sahrens if (BP_IS_HOLE(bp)) 145cdb0ab79Smaybee return (0); 146fa9e4066Sahrens 147b24ab676SJeff Bonwick ASSERT(dmu_tx_is_syncing(tx)); 148b24ab676SJeff Bonwick ASSERT(bp->blk_birth <= tx->tx_txg); 149b24ab676SJeff Bonwick 150fa9e4066Sahrens if (ds == NULL) { 151b24ab676SJeff Bonwick dsl_free(tx->tx_pool, tx->tx_txg, bp); 152ce636f8bSMatthew Ahrens dsl_pool_mos_diduse_space(tx->tx_pool, 153ce636f8bSMatthew Ahrens -used, -compressed, -uncompressed); 154cdb0ab79Smaybee return (used); 155fa9e4066Sahrens } 156fa9e4066Sahrens ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); 157fa9e4066Sahrens 158*bc9014e6SJustin Gibbs ASSERT(!ds->ds_is_snapshot); 159fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 160fa9e4066Sahrens 161c1379625SJustin T. Gibbs if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { 162a9799022Sck int64_t delta; 163c717a561Smaybee 1643f9d6ad7SLin Ling dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); 165b24ab676SJeff Bonwick dsl_free(tx->tx_pool, tx->tx_txg, bp); 166fa9e4066Sahrens 167fa9e4066Sahrens mutex_enter(&ds->ds_lock); 168c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || 169a9799022Sck !DS_UNIQUE_IS_ACCURATE(ds)); 170a9799022Sck delta = parent_delta(ds, -used); 171c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes -= used; 172fa9e4066Sahrens mutex_exit(&ds->ds_lock); 17374e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, 174a9799022Sck delta, -compressed, -uncompressed, tx); 17574e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, -used - delta, 17674e7dc98SMatthew Ahrens DD_USED_REFRSRV, DD_USED_HEAD, tx); 177fa9e4066Sahrens } else { 178fa9e4066Sahrens dprintf_bp(bp, "putting on dead list: %s", ""); 179b24ab676SJeff Bonwick if (async) { 180b24ab676SJeff Bonwick /* 181b24ab676SJeff Bonwick * We are here as part of zio's write done callback, 182b24ab676SJeff Bonwick * which means we're a zio interrupt thread. We can't 183cde58dbcSMatthew Ahrens * call dsl_deadlist_insert() now because it may block 184b24ab676SJeff Bonwick * waiting for I/O. Instead, put bp on the deferred 185b24ab676SJeff Bonwick * queue and let dsl_pool_sync() finish the job. 186b24ab676SJeff Bonwick */ 187cde58dbcSMatthew Ahrens bplist_append(&ds->ds_pending_deadlist, bp); 188b24ab676SJeff Bonwick } else { 189cde58dbcSMatthew Ahrens dsl_deadlist_insert(&ds->ds_deadlist, bp, tx); 190b24ab676SJeff Bonwick } 191a4611edeSahrens ASSERT3U(ds->ds_prev->ds_object, ==, 192c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj); 193c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); 194fa9e4066Sahrens /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ 195c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 196a4611edeSahrens ds->ds_object && bp->blk_birth > 197c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { 198a4611edeSahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 199a4611edeSahrens mutex_enter(&ds->ds_prev->ds_lock); 200c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; 201a4611edeSahrens mutex_exit(&ds->ds_prev->ds_lock); 202fa9e4066Sahrens } 2033f9d6ad7SLin Ling if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { 20474e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, used, 20574e7dc98SMatthew Ahrens DD_USED_HEAD, DD_USED_SNAP, tx); 20674e7dc98SMatthew Ahrens } 207fa9e4066Sahrens } 208fa9e4066Sahrens mutex_enter(&ds->ds_lock); 209c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); 210c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes -= used; 211c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); 212c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; 213c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); 214c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; 215fa9e4066Sahrens mutex_exit(&ds->ds_lock); 216cdb0ab79Smaybee 217cdb0ab79Smaybee return (used); 218fa9e4066Sahrens } 219fa9e4066Sahrens 220ea8dc4b6Seschrock uint64_t 221ea8dc4b6Seschrock dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) 222fa9e4066Sahrens { 223a2eea2e1Sahrens uint64_t trysnap = 0; 224a2eea2e1Sahrens 225fa9e4066Sahrens if (ds == NULL) 226ea8dc4b6Seschrock return (0); 227fa9e4066Sahrens /* 228fa9e4066Sahrens * The snapshot creation could fail, but that would cause an 229fa9e4066Sahrens * incorrect FALSE return, which would only result in an 230fa9e4066Sahrens * overestimation of the amount of space that an operation would 231fa9e4066Sahrens * consume, which is OK. 232fa9e4066Sahrens * 233fa9e4066Sahrens * There's also a small window where we could miss a pending 234fa9e4066Sahrens * snapshot, because we could set the sync task in the quiescing 235fa9e4066Sahrens * phase. So this should only be used as a guess. 236fa9e4066Sahrens */ 237a2eea2e1Sahrens if (ds->ds_trysnap_txg > 238a2eea2e1Sahrens spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) 239a2eea2e1Sahrens trysnap = ds->ds_trysnap_txg; 240c1379625SJustin T. Gibbs return (MAX(dsl_dataset_phys(ds)->ds_prev_snap_txg, trysnap)); 241ea8dc4b6Seschrock } 242ea8dc4b6Seschrock 2433d692628SSanjeev Bagewadi boolean_t 244c7cd2421SGeorge Wilson dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp, 245c7cd2421SGeorge Wilson uint64_t blk_birth) 246ea8dc4b6Seschrock { 24743466aaeSMax Grossman if (blk_birth <= dsl_dataset_prev_snap_txg(ds) || 24843466aaeSMax Grossman (bp != NULL && BP_IS_HOLE(bp))) 249c7cd2421SGeorge Wilson return (B_FALSE); 250c7cd2421SGeorge Wilson 251837b568bSGeorge Wilson ddt_prefetch(dsl_dataset_get_spa(ds), bp); 252c7cd2421SGeorge Wilson 253c7cd2421SGeorge Wilson return (B_TRUE); 254fa9e4066Sahrens } 255fa9e4066Sahrens 256fa9e4066Sahrens static void 257*bc9014e6SJustin Gibbs dsl_dataset_evict(void *dbu) 258fa9e4066Sahrens { 259*bc9014e6SJustin Gibbs dsl_dataset_t *ds = dbu; 260fa9e4066Sahrens 2613b2aab18SMatthew Ahrens ASSERT(ds->ds_owner == NULL); 262fa9e4066Sahrens 263*bc9014e6SJustin Gibbs ds->ds_dbuf = NULL; 264*bc9014e6SJustin Gibbs 26591ebeef5Sahrens unique_remove(ds->ds_fsid_guid); 266fa9e4066Sahrens 267503ad85cSMatthew Ahrens if (ds->ds_objset != NULL) 268503ad85cSMatthew Ahrens dmu_objset_evict(ds->ds_objset); 269fa9e4066Sahrens 270fa9e4066Sahrens if (ds->ds_prev) { 2713b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 272fa9e4066Sahrens ds->ds_prev = NULL; 273fa9e4066Sahrens } 274fa9e4066Sahrens 275cde58dbcSMatthew Ahrens bplist_destroy(&ds->ds_pending_deadlist); 276*bc9014e6SJustin Gibbs if (ds->ds_deadlist.dl_os != NULL) 277cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 278745cd3c5Smaybee if (ds->ds_dir) 279*bc9014e6SJustin Gibbs dsl_dir_async_rele(ds->ds_dir, ds); 280fa9e4066Sahrens 28191ebeef5Sahrens ASSERT(!list_link_active(&ds->ds_synced_link)); 282fa9e4066Sahrens 2835ad82045Snd mutex_destroy(&ds->ds_lock); 28491ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 285d2b3cbbdSJorgen Lundman mutex_destroy(&ds->ds_sendstream_lock); 2863b2aab18SMatthew Ahrens refcount_destroy(&ds->ds_longholds); 2875ad82045Snd 288fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 289fa9e4066Sahrens } 290fa9e4066Sahrens 2913b2aab18SMatthew Ahrens int 292fa9e4066Sahrens dsl_dataset_get_snapname(dsl_dataset_t *ds) 293fa9e4066Sahrens { 294fa9e4066Sahrens dsl_dataset_phys_t *headphys; 295fa9e4066Sahrens int err; 296fa9e4066Sahrens dmu_buf_t *headdbuf; 297fa9e4066Sahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 298fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 299fa9e4066Sahrens 300fa9e4066Sahrens if (ds->ds_snapname[0]) 301ea8dc4b6Seschrock return (0); 302c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) 303ea8dc4b6Seschrock return (0); 304fa9e4066Sahrens 305c1379625SJustin T. Gibbs err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, 306ea8dc4b6Seschrock FTAG, &headdbuf); 3073b2aab18SMatthew Ahrens if (err != 0) 308ea8dc4b6Seschrock return (err); 309fa9e4066Sahrens headphys = headdbuf->db_data; 310fa9e4066Sahrens err = zap_value_search(dp->dp_meta_objset, 311e7437265Sahrens headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); 312ea8dc4b6Seschrock dmu_buf_rele(headdbuf, FTAG); 313ea8dc4b6Seschrock return (err); 314fa9e4066Sahrens } 315fa9e4066Sahrens 3163b2aab18SMatthew Ahrens int 317745cd3c5Smaybee dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) 318ab04eb8eStimh { 319745cd3c5Smaybee objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 320c1379625SJustin T. Gibbs uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 321ab04eb8eStimh matchtype_t mt; 322ab04eb8eStimh int err; 323ab04eb8eStimh 324c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) 325ab04eb8eStimh mt = MT_FIRST; 326ab04eb8eStimh else 327ab04eb8eStimh mt = MT_EXACT; 328ab04eb8eStimh 329745cd3c5Smaybee err = zap_lookup_norm(mos, snapobj, name, 8, 1, 330ab04eb8eStimh value, mt, NULL, 0, NULL); 331ab04eb8eStimh if (err == ENOTSUP && mt == MT_FIRST) 332745cd3c5Smaybee err = zap_lookup(mos, snapobj, name, 8, 1, value); 333ab04eb8eStimh return (err); 334ab04eb8eStimh } 335ab04eb8eStimh 3363b2aab18SMatthew Ahrens int 337a2afb611SJerry Jelinek dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, 338a2afb611SJerry Jelinek boolean_t adj_cnt) 339ab04eb8eStimh { 340745cd3c5Smaybee objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 341c1379625SJustin T. Gibbs uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 342ab04eb8eStimh matchtype_t mt; 343ab04eb8eStimh int err; 344ab04eb8eStimh 34571eb0538SChris Kirby dsl_dir_snap_cmtime_update(ds->ds_dir); 34671eb0538SChris Kirby 347c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) 348ab04eb8eStimh mt = MT_FIRST; 349ab04eb8eStimh else 350ab04eb8eStimh mt = MT_EXACT; 351ab04eb8eStimh 352745cd3c5Smaybee err = zap_remove_norm(mos, snapobj, name, mt, tx); 353ab04eb8eStimh if (err == ENOTSUP && mt == MT_FIRST) 354745cd3c5Smaybee err = zap_remove(mos, snapobj, name, tx); 355a2afb611SJerry Jelinek 356a2afb611SJerry Jelinek if (err == 0 && adj_cnt) 357a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(ds->ds_dir, -1, 358a2afb611SJerry Jelinek DD_FIELD_SNAPSHOT_COUNT, tx); 359a2afb611SJerry Jelinek 360ab04eb8eStimh return (err); 361ab04eb8eStimh } 362ab04eb8eStimh 3633b2aab18SMatthew Ahrens int 3643b2aab18SMatthew Ahrens dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, 365745cd3c5Smaybee dsl_dataset_t **dsp) 366fa9e4066Sahrens { 367fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 368fa9e4066Sahrens dmu_buf_t *dbuf; 369fa9e4066Sahrens dsl_dataset_t *ds; 370ea8dc4b6Seschrock int err; 371a7f53a56SChris Kirby dmu_object_info_t doi; 372fa9e4066Sahrens 3733b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 374fa9e4066Sahrens 375ea8dc4b6Seschrock err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); 3763b2aab18SMatthew Ahrens if (err != 0) 377ea8dc4b6Seschrock return (err); 378a7f53a56SChris Kirby 379a7f53a56SChris Kirby /* Make sure dsobj has the correct object type. */ 380a7f53a56SChris Kirby dmu_object_info_from_db(dbuf, &doi); 3812acef22dSMatthew Ahrens if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { 382b287be1bSWill Andrews dmu_buf_rele(dbuf, tag); 383be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 384b287be1bSWill Andrews } 385a7f53a56SChris Kirby 386fa9e4066Sahrens ds = dmu_buf_get_user(dbuf); 387fa9e4066Sahrens if (ds == NULL) { 388d5285caeSGeorge Wilson dsl_dataset_t *winner = NULL; 389fa9e4066Sahrens 390fa9e4066Sahrens ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); 391fa9e4066Sahrens ds->ds_dbuf = dbuf; 392fa9e4066Sahrens ds->ds_object = dsobj; 393*bc9014e6SJustin Gibbs ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; 394fa9e4066Sahrens 3955ad82045Snd mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); 39691ebeef5Sahrens mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); 3974e3c9f44SBill Pijewski mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); 3983b2aab18SMatthew Ahrens refcount_create(&ds->ds_longholds); 3995ad82045Snd 400cde58dbcSMatthew Ahrens bplist_create(&ds->ds_pending_deadlist); 401cde58dbcSMatthew Ahrens dsl_deadlist_open(&ds->ds_deadlist, 402c1379625SJustin T. Gibbs mos, dsl_dataset_phys(ds)->ds_deadlist_obj); 403cde58dbcSMatthew Ahrens 4044e3c9f44SBill Pijewski list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), 4054e3c9f44SBill Pijewski offsetof(dmu_sendarg_t, dsa_link)); 4064e3c9f44SBill Pijewski 407b5152584SMatthew Ahrens if (doi.doi_type == DMU_OTN_ZAP_METADATA) { 408b5152584SMatthew Ahrens err = zap_contains(mos, dsobj, DS_FIELD_LARGE_BLOCKS); 409b5152584SMatthew Ahrens if (err == 0) 410b5152584SMatthew Ahrens ds->ds_large_blocks = B_TRUE; 411b5152584SMatthew Ahrens else 412b5152584SMatthew Ahrens ASSERT3U(err, ==, ENOENT); 413b5152584SMatthew Ahrens } 414b5152584SMatthew Ahrens 415ea8dc4b6Seschrock if (err == 0) { 4163b2aab18SMatthew Ahrens err = dsl_dir_hold_obj(dp, 417c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds, 418c1379625SJustin T. Gibbs &ds->ds_dir); 419ea8dc4b6Seschrock } 4203b2aab18SMatthew Ahrens if (err != 0) { 4215ad82045Snd mutex_destroy(&ds->ds_lock); 42291ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 423d2b3cbbdSJorgen Lundman mutex_destroy(&ds->ds_sendstream_lock); 4243b2aab18SMatthew Ahrens refcount_destroy(&ds->ds_longholds); 425cde58dbcSMatthew Ahrens bplist_destroy(&ds->ds_pending_deadlist); 426cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 427ea8dc4b6Seschrock kmem_free(ds, sizeof (dsl_dataset_t)); 428ea8dc4b6Seschrock dmu_buf_rele(dbuf, tag); 429ea8dc4b6Seschrock return (err); 430ea8dc4b6Seschrock } 431fa9e4066Sahrens 432*bc9014e6SJustin Gibbs if (!ds->ds_is_snapshot) { 433fa9e4066Sahrens ds->ds_snapname[0] = '\0'; 434c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { 4353b2aab18SMatthew Ahrens err = dsl_dataset_hold_obj(dp, 436c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, 437745cd3c5Smaybee ds, &ds->ds_prev); 438fa9e4066Sahrens } 43978f17100SMatthew Ahrens if (doi.doi_type == DMU_OTN_ZAP_METADATA) { 44078f17100SMatthew Ahrens int zaperr = zap_lookup(mos, ds->ds_object, 44178f17100SMatthew Ahrens DS_FIELD_BOOKMARK_NAMES, 44278f17100SMatthew Ahrens sizeof (ds->ds_bookmarks), 1, 44378f17100SMatthew Ahrens &ds->ds_bookmarks); 44478f17100SMatthew Ahrens if (zaperr != ENOENT) 44578f17100SMatthew Ahrens VERIFY0(zaperr); 44678f17100SMatthew Ahrens } 447842727c2SChris Kirby } else { 448842727c2SChris Kirby if (zfs_flags & ZFS_DEBUG_SNAPNAMES) 449842727c2SChris Kirby err = dsl_dataset_get_snapname(ds); 450c1379625SJustin T. Gibbs if (err == 0 && 451c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { 452842727c2SChris Kirby err = zap_count( 453842727c2SChris Kirby ds->ds_dir->dd_pool->dp_meta_objset, 454c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_userrefs_obj, 455842727c2SChris Kirby &ds->ds_userrefs); 456842727c2SChris Kirby } 457fa9e4066Sahrens } 458fa9e4066Sahrens 459*bc9014e6SJustin Gibbs if (err == 0 && !ds->ds_is_snapshot) { 4603b2aab18SMatthew Ahrens err = dsl_prop_get_int_ds(ds, 4613b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 4623b2aab18SMatthew Ahrens &ds->ds_reserved); 463cb625fb5Sck if (err == 0) { 4643b2aab18SMatthew Ahrens err = dsl_prop_get_int_ds(ds, 4653b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 4663b2aab18SMatthew Ahrens &ds->ds_quota); 467cb625fb5Sck } 468cb625fb5Sck } else { 469cb625fb5Sck ds->ds_reserved = ds->ds_quota = 0; 470cb625fb5Sck } 471cb625fb5Sck 472*bc9014e6SJustin Gibbs dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict, &ds->ds_dbuf); 473*bc9014e6SJustin Gibbs if (err == 0) 474*bc9014e6SJustin Gibbs winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); 475*bc9014e6SJustin Gibbs 476*bc9014e6SJustin Gibbs if (err != 0 || winner != NULL) { 477cde58dbcSMatthew Ahrens bplist_destroy(&ds->ds_pending_deadlist); 478cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 479745cd3c5Smaybee if (ds->ds_prev) 4803b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 4813b2aab18SMatthew Ahrens dsl_dir_rele(ds->ds_dir, ds); 4825ad82045Snd mutex_destroy(&ds->ds_lock); 48391ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 484d2b3cbbdSJorgen Lundman mutex_destroy(&ds->ds_sendstream_lock); 4853b2aab18SMatthew Ahrens refcount_destroy(&ds->ds_longholds); 486fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 4873b2aab18SMatthew Ahrens if (err != 0) { 488ea8dc4b6Seschrock dmu_buf_rele(dbuf, tag); 489ea8dc4b6Seschrock return (err); 490ea8dc4b6Seschrock } 491fa9e4066Sahrens ds = winner; 492fa9e4066Sahrens } else { 49391ebeef5Sahrens ds->ds_fsid_guid = 494c1379625SJustin T. Gibbs unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); 495fa9e4066Sahrens } 496fa9e4066Sahrens } 497fa9e4066Sahrens ASSERT3P(ds->ds_dbuf, ==, dbuf); 498c1379625SJustin T. Gibbs ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); 499c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || 500afc6333aSahrens spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || 50184db2a68Sahrens dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); 502ea8dc4b6Seschrock *dsp = ds; 503ea8dc4b6Seschrock return (0); 504fa9e4066Sahrens } 505fa9e4066Sahrens 506745cd3c5Smaybee int 5073b2aab18SMatthew Ahrens dsl_dataset_hold(dsl_pool_t *dp, const char *name, 508503ad85cSMatthew Ahrens void *tag, dsl_dataset_t **dsp) 509fa9e4066Sahrens { 510fa9e4066Sahrens dsl_dir_t *dd; 511745cd3c5Smaybee const char *snapname; 512fa9e4066Sahrens uint64_t obj; 513fa9e4066Sahrens int err = 0; 514fa9e4066Sahrens 5153b2aab18SMatthew Ahrens err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); 5163b2aab18SMatthew Ahrens if (err != 0) 517ea8dc4b6Seschrock return (err); 518fa9e4066Sahrens 5193b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 520c1379625SJustin T. Gibbs obj = dsl_dir_phys(dd)->dd_head_dataset_obj; 5213b2aab18SMatthew Ahrens if (obj != 0) 5223b2aab18SMatthew Ahrens err = dsl_dataset_hold_obj(dp, obj, tag, dsp); 523745cd3c5Smaybee else 524be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 525fa9e4066Sahrens 526745cd3c5Smaybee /* we may be looking for a snapshot */ 527745cd3c5Smaybee if (err == 0 && snapname != NULL) { 5283b2aab18SMatthew Ahrens dsl_dataset_t *ds; 529fa9e4066Sahrens 530745cd3c5Smaybee if (*snapname++ != '@') { 531745cd3c5Smaybee dsl_dataset_rele(*dsp, tag); 5323b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 533be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 534fa9e4066Sahrens } 535fa9e4066Sahrens 536745cd3c5Smaybee dprintf("looking for snapshot '%s'\n", snapname); 537745cd3c5Smaybee err = dsl_dataset_snap_lookup(*dsp, snapname, &obj); 538745cd3c5Smaybee if (err == 0) 5393b2aab18SMatthew Ahrens err = dsl_dataset_hold_obj(dp, obj, tag, &ds); 540745cd3c5Smaybee dsl_dataset_rele(*dsp, tag); 541745cd3c5Smaybee 5423b2aab18SMatthew Ahrens if (err == 0) { 543745cd3c5Smaybee mutex_enter(&ds->ds_lock); 544745cd3c5Smaybee if (ds->ds_snapname[0] == 0) 545745cd3c5Smaybee (void) strlcpy(ds->ds_snapname, snapname, 546745cd3c5Smaybee sizeof (ds->ds_snapname)); 547745cd3c5Smaybee mutex_exit(&ds->ds_lock); 5483b2aab18SMatthew Ahrens *dsp = ds; 549fa9e4066Sahrens } 550fa9e4066Sahrens } 5513b2aab18SMatthew Ahrens 5523b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 553fa9e4066Sahrens return (err); 554fa9e4066Sahrens } 555fa9e4066Sahrens 556fa9e4066Sahrens int 5573b2aab18SMatthew Ahrens dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, 5583b2aab18SMatthew Ahrens void *tag, dsl_dataset_t **dsp) 5593b2aab18SMatthew Ahrens { 5603b2aab18SMatthew Ahrens int err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp); 5613b2aab18SMatthew Ahrens if (err != 0) 5623b2aab18SMatthew Ahrens return (err); 5633b2aab18SMatthew Ahrens if (!dsl_dataset_tryown(*dsp, tag)) { 5643b2aab18SMatthew Ahrens dsl_dataset_rele(*dsp, tag); 5653b2aab18SMatthew Ahrens *dsp = NULL; 566be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 5673b2aab18SMatthew Ahrens } 5683b2aab18SMatthew Ahrens return (0); 5693b2aab18SMatthew Ahrens } 5703b2aab18SMatthew Ahrens 5713b2aab18SMatthew Ahrens int 5723b2aab18SMatthew Ahrens dsl_dataset_own(dsl_pool_t *dp, const char *name, 573503ad85cSMatthew Ahrens void *tag, dsl_dataset_t **dsp) 574fa9e4066Sahrens { 5753b2aab18SMatthew Ahrens int err = dsl_dataset_hold(dp, name, tag, dsp); 5763b2aab18SMatthew Ahrens if (err != 0) 577745cd3c5Smaybee return (err); 5783b2aab18SMatthew Ahrens if (!dsl_dataset_tryown(*dsp, tag)) { 579503ad85cSMatthew Ahrens dsl_dataset_rele(*dsp, tag); 580be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 581745cd3c5Smaybee } 582745cd3c5Smaybee return (0); 583fa9e4066Sahrens } 584fa9e4066Sahrens 5853b2aab18SMatthew Ahrens /* 5863b2aab18SMatthew Ahrens * See the comment above dsl_pool_hold() for details. In summary, a long 5873b2aab18SMatthew Ahrens * hold is used to prevent destruction of a dataset while the pool hold 5883b2aab18SMatthew Ahrens * is dropped, allowing other concurrent operations (e.g. spa_sync()). 5893b2aab18SMatthew Ahrens * 5903b2aab18SMatthew Ahrens * The dataset and pool must be held when this function is called. After it 5913b2aab18SMatthew Ahrens * is called, the pool hold may be released while the dataset is still held 5923b2aab18SMatthew Ahrens * and accessed. 5933b2aab18SMatthew Ahrens */ 5943b2aab18SMatthew Ahrens void 5953b2aab18SMatthew Ahrens dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) 5963b2aab18SMatthew Ahrens { 5973b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 5983b2aab18SMatthew Ahrens (void) refcount_add(&ds->ds_longholds, tag); 5993b2aab18SMatthew Ahrens } 6003b2aab18SMatthew Ahrens 6013b2aab18SMatthew Ahrens void 6023b2aab18SMatthew Ahrens dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) 6033b2aab18SMatthew Ahrens { 6043b2aab18SMatthew Ahrens (void) refcount_remove(&ds->ds_longholds, tag); 6053b2aab18SMatthew Ahrens } 6063b2aab18SMatthew Ahrens 6073b2aab18SMatthew Ahrens /* Return B_TRUE if there are any long holds on this dataset. */ 6083b2aab18SMatthew Ahrens boolean_t 6093b2aab18SMatthew Ahrens dsl_dataset_long_held(dsl_dataset_t *ds) 6103b2aab18SMatthew Ahrens { 6113b2aab18SMatthew Ahrens return (!refcount_is_zero(&ds->ds_longholds)); 6123b2aab18SMatthew Ahrens } 6133b2aab18SMatthew Ahrens 614fa9e4066Sahrens void 615fa9e4066Sahrens dsl_dataset_name(dsl_dataset_t *ds, char *name) 616fa9e4066Sahrens { 617fa9e4066Sahrens if (ds == NULL) { 618fa9e4066Sahrens (void) strcpy(name, "mos"); 619fa9e4066Sahrens } else { 620fa9e4066Sahrens dsl_dir_name(ds->ds_dir, name); 6213b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 622fa9e4066Sahrens if (ds->ds_snapname[0]) { 623fa9e4066Sahrens (void) strcat(name, "@"); 624745cd3c5Smaybee /* 625745cd3c5Smaybee * We use a "recursive" mutex so that we 626745cd3c5Smaybee * can call dprintf_ds() with ds_lock held. 627745cd3c5Smaybee */ 628fa9e4066Sahrens if (!MUTEX_HELD(&ds->ds_lock)) { 629fa9e4066Sahrens mutex_enter(&ds->ds_lock); 630fa9e4066Sahrens (void) strcat(name, ds->ds_snapname); 631fa9e4066Sahrens mutex_exit(&ds->ds_lock); 632fa9e4066Sahrens } else { 633fa9e4066Sahrens (void) strcat(name, ds->ds_snapname); 634fa9e4066Sahrens } 635fa9e4066Sahrens } 636fa9e4066Sahrens } 637fa9e4066Sahrens } 638fa9e4066Sahrens 6393cb34c60Sahrens void 640745cd3c5Smaybee dsl_dataset_rele(dsl_dataset_t *ds, void *tag) 6413cb34c60Sahrens { 6423b2aab18SMatthew Ahrens dmu_buf_rele(ds->ds_dbuf, tag); 643745cd3c5Smaybee } 644745cd3c5Smaybee 645745cd3c5Smaybee void 646503ad85cSMatthew Ahrens dsl_dataset_disown(dsl_dataset_t *ds, void *tag) 647745cd3c5Smaybee { 648d808a4fcSJustin T. Gibbs ASSERT3P(ds->ds_owner, ==, tag); 649d808a4fcSJustin T. Gibbs ASSERT(ds->ds_dbuf != NULL); 650745cd3c5Smaybee 6513cb34c60Sahrens mutex_enter(&ds->ds_lock); 652745cd3c5Smaybee ds->ds_owner = NULL; 6533cb34c60Sahrens mutex_exit(&ds->ds_lock); 6543b2aab18SMatthew Ahrens dsl_dataset_long_rele(ds, tag); 655d808a4fcSJustin T. Gibbs dsl_dataset_rele(ds, tag); 6563cb34c60Sahrens } 6573cb34c60Sahrens 6583cb34c60Sahrens boolean_t 6593b2aab18SMatthew Ahrens dsl_dataset_tryown(dsl_dataset_t *ds, void *tag) 6603cb34c60Sahrens { 661745cd3c5Smaybee boolean_t gotit = FALSE; 662745cd3c5Smaybee 6633cb34c60Sahrens mutex_enter(&ds->ds_lock); 6643b2aab18SMatthew Ahrens if (ds->ds_owner == NULL && !DS_IS_INCONSISTENT(ds)) { 665503ad85cSMatthew Ahrens ds->ds_owner = tag; 6663b2aab18SMatthew Ahrens dsl_dataset_long_hold(ds, tag); 667745cd3c5Smaybee gotit = TRUE; 6683cb34c60Sahrens } 6693cb34c60Sahrens mutex_exit(&ds->ds_lock); 670745cd3c5Smaybee return (gotit); 671745cd3c5Smaybee } 672745cd3c5Smaybee 6731d452cf5Sahrens uint64_t 674088f3894Sahrens dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, 675ab04eb8eStimh uint64_t flags, dmu_tx_t *tx) 676fa9e4066Sahrens { 6773cb34c60Sahrens dsl_pool_t *dp = dd->dd_pool; 678fa9e4066Sahrens dmu_buf_t *dbuf; 679fa9e4066Sahrens dsl_dataset_phys_t *dsphys; 6803cb34c60Sahrens uint64_t dsobj; 681fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 682fa9e4066Sahrens 683088f3894Sahrens if (origin == NULL) 684088f3894Sahrens origin = dp->dp_origin_snap; 685088f3894Sahrens 6863cb34c60Sahrens ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); 687c1379625SJustin T. Gibbs ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); 688fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 689c1379625SJustin T. Gibbs ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); 690fa9e4066Sahrens 6911649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 6921649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 6933b2aab18SMatthew Ahrens VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 694fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 695fa9e4066Sahrens dsphys = dbuf->db_data; 696745cd3c5Smaybee bzero(dsphys, sizeof (dsl_dataset_phys_t)); 697fa9e4066Sahrens dsphys->ds_dir_obj = dd->dd_object; 698ab04eb8eStimh dsphys->ds_flags = flags; 699fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 700fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 701fa9e4066Sahrens sizeof (dsphys->ds_guid)); 702fa9e4066Sahrens dsphys->ds_snapnames_zapobj = 703ab04eb8eStimh zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, 704ab04eb8eStimh DMU_OT_NONE, 0, tx); 705fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 706088f3894Sahrens dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; 707a9799022Sck 708cde58dbcSMatthew Ahrens if (origin == NULL) { 709cde58dbcSMatthew Ahrens dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); 710cde58dbcSMatthew Ahrens } else { 7113b2aab18SMatthew Ahrens dsl_dataset_t *ohds; /* head of the origin snapshot */ 712cde58dbcSMatthew Ahrens 7133cb34c60Sahrens dsphys->ds_prev_snap_obj = origin->ds_object; 714fa9e4066Sahrens dsphys->ds_prev_snap_txg = 715c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_creation_txg; 716ad135b5dSChristopher Siden dsphys->ds_referenced_bytes = 717c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_referenced_bytes; 718fa9e4066Sahrens dsphys->ds_compressed_bytes = 719c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_compressed_bytes; 720fa9e4066Sahrens dsphys->ds_uncompressed_bytes = 721c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_uncompressed_bytes; 722c1379625SJustin T. Gibbs dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; 72342fcb65eSMatthew Ahrens 72442fcb65eSMatthew Ahrens /* 72542fcb65eSMatthew Ahrens * Inherit flags that describe the dataset's contents 72642fcb65eSMatthew Ahrens * (INCONSISTENT) or properties (Case Insensitive). 72742fcb65eSMatthew Ahrens */ 728c1379625SJustin T. Gibbs dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & 72942fcb65eSMatthew Ahrens (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); 730fa9e4066Sahrens 731b5152584SMatthew Ahrens if (origin->ds_large_blocks) 732b5152584SMatthew Ahrens dsl_dataset_activate_large_blocks_sync_impl(dsobj, tx); 733b5152584SMatthew Ahrens 7343cb34c60Sahrens dmu_buf_will_dirty(origin->ds_dbuf, tx); 735c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_num_children++; 736fa9e4066Sahrens 7373b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 738c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, 739c1379625SJustin T. Gibbs FTAG, &ohds)); 740cde58dbcSMatthew Ahrens dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, 741cde58dbcSMatthew Ahrens dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); 742cde58dbcSMatthew Ahrens dsl_dataset_rele(ohds, FTAG); 743cde58dbcSMatthew Ahrens 744088f3894Sahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { 745c1379625SJustin T. Gibbs if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { 746c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_next_clones_obj = 747088f3894Sahrens zap_create(mos, 748088f3894Sahrens DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); 749088f3894Sahrens } 7503b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 751c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_next_clones_obj, 752c1379625SJustin T. Gibbs dsobj, tx)); 753088f3894Sahrens } 754088f3894Sahrens 755fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 756c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; 757cde58dbcSMatthew Ahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 758c1379625SJustin T. Gibbs if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { 759cde58dbcSMatthew Ahrens dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); 760c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_clones = 761cde58dbcSMatthew Ahrens zap_create(mos, 762cde58dbcSMatthew Ahrens DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); 763cde58dbcSMatthew Ahrens } 7643b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 765c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_clones, 766c1379625SJustin T. Gibbs dsobj, tx)); 767cde58dbcSMatthew Ahrens } 768fa9e4066Sahrens } 769ab04eb8eStimh 770ab04eb8eStimh if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) 771ab04eb8eStimh dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 772ab04eb8eStimh 773ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 774fa9e4066Sahrens 775fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 776c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; 7773cb34c60Sahrens 7783cb34c60Sahrens return (dsobj); 7793cb34c60Sahrens } 7803cb34c60Sahrens 7813b2aab18SMatthew Ahrens static void 7823b2aab18SMatthew Ahrens dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) 7833b2aab18SMatthew Ahrens { 7843b2aab18SMatthew Ahrens objset_t *os; 7853b2aab18SMatthew Ahrens 7863b2aab18SMatthew Ahrens VERIFY0(dmu_objset_from_ds(ds, &os)); 7873b2aab18SMatthew Ahrens bzero(&os->os_zil_header, sizeof (os->os_zil_header)); 7883b2aab18SMatthew Ahrens dsl_dataset_dirty(ds, tx); 7893b2aab18SMatthew Ahrens } 7903b2aab18SMatthew Ahrens 7913cb34c60Sahrens uint64_t 792ab04eb8eStimh dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, 793ab04eb8eStimh dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) 7943cb34c60Sahrens { 7953cb34c60Sahrens dsl_pool_t *dp = pdd->dd_pool; 7963cb34c60Sahrens uint64_t dsobj, ddobj; 7973cb34c60Sahrens dsl_dir_t *dd; 7983cb34c60Sahrens 7993b2aab18SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 8003cb34c60Sahrens ASSERT(lastname[0] != '@'); 8013cb34c60Sahrens 802088f3894Sahrens ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); 8033b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); 8043cb34c60Sahrens 8053b2aab18SMatthew Ahrens dsobj = dsl_dataset_create_sync_dd(dd, origin, 8063b2aab18SMatthew Ahrens flags & ~DS_CREATE_FLAG_NODIRTY, tx); 8073cb34c60Sahrens 8083cb34c60Sahrens dsl_deleg_set_create_perms(dd, tx, cr); 8093cb34c60Sahrens 810a2afb611SJerry Jelinek /* 811a2afb611SJerry Jelinek * Since we're creating a new node we know it's a leaf, so we can 812a2afb611SJerry Jelinek * initialize the counts if the limit feature is active. 813a2afb611SJerry Jelinek */ 814a2afb611SJerry Jelinek if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { 815a2afb611SJerry Jelinek uint64_t cnt = 0; 816a2afb611SJerry Jelinek objset_t *os = dd->dd_pool->dp_meta_objset; 817a2afb611SJerry Jelinek 818a2afb611SJerry Jelinek dsl_dir_zapify(dd, tx); 819a2afb611SJerry Jelinek VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, 820a2afb611SJerry Jelinek sizeof (cnt), 1, &cnt, tx)); 821a2afb611SJerry Jelinek VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, 822a2afb611SJerry Jelinek sizeof (cnt), 1, &cnt, tx)); 823a2afb611SJerry Jelinek } 824a2afb611SJerry Jelinek 8253b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 826fa9e4066Sahrens 827feaa74e4SMark Maybee /* 828feaa74e4SMark Maybee * If we are creating a clone, make sure we zero out any stale 829feaa74e4SMark Maybee * data from the origin snapshots zil header. 830feaa74e4SMark Maybee */ 8313b2aab18SMatthew Ahrens if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { 832feaa74e4SMark Maybee dsl_dataset_t *ds; 833feaa74e4SMark Maybee 8343b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); 8353b2aab18SMatthew Ahrens dsl_dataset_zero_zil(ds, tx); 836feaa74e4SMark Maybee dsl_dataset_rele(ds, FTAG); 837feaa74e4SMark Maybee } 838feaa74e4SMark Maybee 8391d452cf5Sahrens return (dsobj); 840fa9e4066Sahrens } 841fa9e4066Sahrens 8421d452cf5Sahrens /* 8433b2aab18SMatthew Ahrens * The unique space in the head dataset can be calculated by subtracting 8443b2aab18SMatthew Ahrens * the space used in the most recent snapshot, that is still being used 8453b2aab18SMatthew Ahrens * in this file system, from the space currently in use. To figure out 8463b2aab18SMatthew Ahrens * the space in the most recent snapshot still in use, we need to take 8473b2aab18SMatthew Ahrens * the total space used in the snapshot and subtract out the space that 8483b2aab18SMatthew Ahrens * has been freed up since the snapshot was taken. 8491d452cf5Sahrens */ 8503b2aab18SMatthew Ahrens void 8513b2aab18SMatthew Ahrens dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) 8521d452cf5Sahrens { 8533b2aab18SMatthew Ahrens uint64_t mrs_used; 8543b2aab18SMatthew Ahrens uint64_t dlused, dlcomp, dluncomp; 8551d452cf5Sahrens 856*bc9014e6SJustin Gibbs ASSERT(!ds->ds_is_snapshot); 8571d452cf5Sahrens 858c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) 859c1379625SJustin T. Gibbs mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; 8603b2aab18SMatthew Ahrens else 8613b2aab18SMatthew Ahrens mrs_used = 0; 862842727c2SChris Kirby 8633b2aab18SMatthew Ahrens dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); 864fa9e4066Sahrens 8653b2aab18SMatthew Ahrens ASSERT3U(dlused, <=, mrs_used); 866c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes = 867c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); 86819b94df9SMatthew Ahrens 8693b2aab18SMatthew Ahrens if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= 8703b2aab18SMatthew Ahrens SPA_VERSION_UNIQUE_ACCURATE) 871c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 872fa9e4066Sahrens } 873fa9e4066Sahrens 8743b2aab18SMatthew Ahrens void 8753b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, 8763b2aab18SMatthew Ahrens dmu_tx_t *tx) 877842727c2SChris Kirby { 8783b2aab18SMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 8793b2aab18SMatthew Ahrens uint64_t count; 8803b2aab18SMatthew Ahrens int err; 8813b2aab18SMatthew Ahrens 882c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); 883c1379625SJustin T. Gibbs err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 884c1379625SJustin T. Gibbs obj, tx); 8853b2aab18SMatthew Ahrens /* 8863b2aab18SMatthew Ahrens * The err should not be ENOENT, but a bug in a previous version 8873b2aab18SMatthew Ahrens * of the code could cause upgrade_clones_cb() to not set 8883b2aab18SMatthew Ahrens * ds_next_snap_obj when it should, leading to a missing entry. 8893b2aab18SMatthew Ahrens * If we knew that the pool was created after 8903b2aab18SMatthew Ahrens * SPA_VERSION_NEXT_CLONES, we could assert that it isn't 8913b2aab18SMatthew Ahrens * ENOENT. However, at least we can check that we don't have 8923b2aab18SMatthew Ahrens * too many entries in the next_clones_obj even after failing to 8933b2aab18SMatthew Ahrens * remove this one. 8943b2aab18SMatthew Ahrens */ 8953b2aab18SMatthew Ahrens if (err != ENOENT) 8963b2aab18SMatthew Ahrens VERIFY0(err); 897c1379625SJustin T. Gibbs ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 8983b2aab18SMatthew Ahrens &count)); 899c1379625SJustin T. Gibbs ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); 9003b2aab18SMatthew Ahrens } 901842727c2SChris Kirby 902842727c2SChris Kirby 9033b2aab18SMatthew Ahrens blkptr_t * 9043b2aab18SMatthew Ahrens dsl_dataset_get_blkptr(dsl_dataset_t *ds) 9053b2aab18SMatthew Ahrens { 906c1379625SJustin T. Gibbs return (&dsl_dataset_phys(ds)->ds_bp); 907842727c2SChris Kirby } 908842727c2SChris Kirby 9093b2aab18SMatthew Ahrens void 9103b2aab18SMatthew Ahrens dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) 911842727c2SChris Kirby { 9123b2aab18SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 9133b2aab18SMatthew Ahrens /* If it's the meta-objset, set dp_meta_rootbp */ 9143b2aab18SMatthew Ahrens if (ds == NULL) { 9153b2aab18SMatthew Ahrens tx->tx_pool->dp_meta_rootbp = *bp; 9163b2aab18SMatthew Ahrens } else { 9173b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 918c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_bp = *bp; 919842727c2SChris Kirby } 9203b2aab18SMatthew Ahrens } 921842727c2SChris Kirby 9223b2aab18SMatthew Ahrens spa_t * 9233b2aab18SMatthew Ahrens dsl_dataset_get_spa(dsl_dataset_t *ds) 9243b2aab18SMatthew Ahrens { 9253b2aab18SMatthew Ahrens return (ds->ds_dir->dd_pool->dp_spa); 926842727c2SChris Kirby } 927842727c2SChris Kirby 9283b2aab18SMatthew Ahrens void 9293b2aab18SMatthew Ahrens dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) 930fa9e4066Sahrens { 9313b2aab18SMatthew Ahrens dsl_pool_t *dp; 932842727c2SChris Kirby 9333b2aab18SMatthew Ahrens if (ds == NULL) /* this is the meta-objset */ 9343b2aab18SMatthew Ahrens return; 9351d452cf5Sahrens 9363b2aab18SMatthew Ahrens ASSERT(ds->ds_objset != NULL); 937fa9e4066Sahrens 938c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) 9393b2aab18SMatthew Ahrens panic("dirtying snapshot!"); 940fa9e4066Sahrens 9413b2aab18SMatthew Ahrens dp = ds->ds_dir->dd_pool; 942ce636f8bSMatthew Ahrens 9433b2aab18SMatthew Ahrens if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 9443b2aab18SMatthew Ahrens /* up the hold count until we can be written out */ 9453b2aab18SMatthew Ahrens dmu_buf_add_ref(ds->ds_dbuf, ds); 9463b2aab18SMatthew Ahrens } 9473b2aab18SMatthew Ahrens } 948fa9e4066Sahrens 9492e2c1355SMatthew Ahrens boolean_t 9502e2c1355SMatthew Ahrens dsl_dataset_is_dirty(dsl_dataset_t *ds) 9512e2c1355SMatthew Ahrens { 9522e2c1355SMatthew Ahrens for (int t = 0; t < TXG_SIZE; t++) { 9532e2c1355SMatthew Ahrens if (txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, 9542e2c1355SMatthew Ahrens ds, t)) 9552e2c1355SMatthew Ahrens return (B_TRUE); 9562e2c1355SMatthew Ahrens } 9572e2c1355SMatthew Ahrens return (B_FALSE); 9582e2c1355SMatthew Ahrens } 9592e2c1355SMatthew Ahrens 960fa9e4066Sahrens static int 9613b2aab18SMatthew Ahrens dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) 962fa9e4066Sahrens { 9633b2aab18SMatthew Ahrens uint64_t asize; 964fa9e4066Sahrens 9653b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) 96688b7b0f2SMatthew Ahrens return (0); 967fa9e4066Sahrens 968e1930233Sbonwick /* 9693b2aab18SMatthew Ahrens * If there's an fs-only reservation, any blocks that might become 9703b2aab18SMatthew Ahrens * owned by the snapshot dataset must be accommodated by space 9713b2aab18SMatthew Ahrens * outside of the reservation. 972e1930233Sbonwick */ 9733b2aab18SMatthew Ahrens ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); 974c1379625SJustin T. Gibbs asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); 9753b2aab18SMatthew Ahrens if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) 976be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 977e1930233Sbonwick 9783cb34c60Sahrens /* 9793b2aab18SMatthew Ahrens * Propagate any reserved space for this snapshot to other 9803b2aab18SMatthew Ahrens * snapshot checks in this sync group. 9813cb34c60Sahrens */ 9823b2aab18SMatthew Ahrens if (asize > 0) 9833b2aab18SMatthew Ahrens dsl_dir_willuse_space(ds->ds_dir, asize, tx); 9843cb34c60Sahrens 985e1930233Sbonwick return (0); 986e1930233Sbonwick } 987e1930233Sbonwick 9883b2aab18SMatthew Ahrens typedef struct dsl_dataset_snapshot_arg { 9893b2aab18SMatthew Ahrens nvlist_t *ddsa_snaps; 9903b2aab18SMatthew Ahrens nvlist_t *ddsa_props; 9913b2aab18SMatthew Ahrens nvlist_t *ddsa_errors; 992a2afb611SJerry Jelinek cred_t *ddsa_cr; 9933b2aab18SMatthew Ahrens } dsl_dataset_snapshot_arg_t; 994842727c2SChris Kirby 9953cb34c60Sahrens int 9963b2aab18SMatthew Ahrens dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, 997a2afb611SJerry Jelinek dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) 9981d452cf5Sahrens { 9993b2aab18SMatthew Ahrens int error; 10003b2aab18SMatthew Ahrens uint64_t value; 1001fa9e4066Sahrens 10023b2aab18SMatthew Ahrens ds->ds_trysnap_txg = tx->tx_txg; 1003745cd3c5Smaybee 10043b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) 1005842727c2SChris Kirby return (0); 1006fa9e4066Sahrens 1007fa9e4066Sahrens /* 10083b2aab18SMatthew Ahrens * We don't allow multiple snapshots of the same txg. If there 10093b2aab18SMatthew Ahrens * is already one, try again. 1010fa9e4066Sahrens */ 1011c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) 1012be6fd75aSMatthew Ahrens return (SET_ERROR(EAGAIN)); 1013fa9e4066Sahrens 1014fa9e4066Sahrens /* 10153b2aab18SMatthew Ahrens * Check for conflicting snapshot name. 1016fa9e4066Sahrens */ 10173b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(ds, snapname, &value); 10183b2aab18SMatthew Ahrens if (error == 0) 1019be6fd75aSMatthew Ahrens return (SET_ERROR(EEXIST)); 10203b2aab18SMatthew Ahrens if (error != ENOENT) 10213b2aab18SMatthew Ahrens return (error); 1022842727c2SChris Kirby 1023ca48f36fSKeith M Wesolowski /* 1024ca48f36fSKeith M Wesolowski * We don't allow taking snapshots of inconsistent datasets, such as 1025ca48f36fSKeith M Wesolowski * those into which we are currently receiving. However, if we are 1026ca48f36fSKeith M Wesolowski * creating this snapshot as part of a receive, this check will be 1027ca48f36fSKeith M Wesolowski * executed atomically with respect to the completion of the receive 1028ca48f36fSKeith M Wesolowski * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this 1029ca48f36fSKeith M Wesolowski * case we ignore this, knowing it will be fixed up for us shortly in 1030ca48f36fSKeith M Wesolowski * dmu_recv_end_sync(). 1031ca48f36fSKeith M Wesolowski */ 1032ca48f36fSKeith M Wesolowski if (!recv && DS_IS_INCONSISTENT(ds)) 1033ca48f36fSKeith M Wesolowski return (SET_ERROR(EBUSY)); 1034ca48f36fSKeith M Wesolowski 1035a2afb611SJerry Jelinek /* 1036a2afb611SJerry Jelinek * Skip the check for temporary snapshots or if we have already checked 1037a2afb611SJerry Jelinek * the counts in dsl_dataset_snapshot_check. This means we really only 1038a2afb611SJerry Jelinek * check the count here when we're receiving a stream. 1039a2afb611SJerry Jelinek */ 1040a2afb611SJerry Jelinek if (cnt != 0 && cr != NULL) { 1041a2afb611SJerry Jelinek error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, 1042a2afb611SJerry Jelinek ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); 1043a2afb611SJerry Jelinek if (error != 0) 1044a2afb611SJerry Jelinek return (error); 1045a2afb611SJerry Jelinek } 1046a2afb611SJerry Jelinek 10473b2aab18SMatthew Ahrens error = dsl_dataset_snapshot_reserve_space(ds, tx); 10483b2aab18SMatthew Ahrens if (error != 0) 10493b2aab18SMatthew Ahrens return (error); 1050842727c2SChris Kirby 10511d452cf5Sahrens return (0); 10521d452cf5Sahrens } 10531d452cf5Sahrens 10543b2aab18SMatthew Ahrens static int 10553b2aab18SMatthew Ahrens dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) 1056745cd3c5Smaybee { 10573b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t *ddsa = arg; 10583b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 10593b2aab18SMatthew Ahrens nvpair_t *pair; 10603b2aab18SMatthew Ahrens int rv = 0; 10613b2aab18SMatthew Ahrens 1062a2afb611SJerry Jelinek /* 1063a2afb611SJerry Jelinek * Pre-compute how many total new snapshots will be created for each 1064a2afb611SJerry Jelinek * level in the tree and below. This is needed for validating the 1065a2afb611SJerry Jelinek * snapshot limit when either taking a recursive snapshot or when 1066a2afb611SJerry Jelinek * taking multiple snapshots. 1067a2afb611SJerry Jelinek * 1068a2afb611SJerry Jelinek * The problem is that the counts are not actually adjusted when 1069a2afb611SJerry Jelinek * we are checking, only when we finally sync. For a single snapshot, 1070a2afb611SJerry Jelinek * this is easy, the count will increase by 1 at each node up the tree, 1071a2afb611SJerry Jelinek * but its more complicated for the recursive/multiple snapshot case. 1072a2afb611SJerry Jelinek * 1073a2afb611SJerry Jelinek * The dsl_fs_ss_limit_check function does recursively check the count 1074a2afb611SJerry Jelinek * at each level up the tree but since it is validating each snapshot 1075a2afb611SJerry Jelinek * independently we need to be sure that we are validating the complete 1076a2afb611SJerry Jelinek * count for the entire set of snapshots. We do this by rolling up the 1077a2afb611SJerry Jelinek * counts for each component of the name into an nvlist and then 1078a2afb611SJerry Jelinek * checking each of those cases with the aggregated count. 1079a2afb611SJerry Jelinek * 1080a2afb611SJerry Jelinek * This approach properly handles not only the recursive snapshot 1081a2afb611SJerry Jelinek * case (where we get all of those on the ddsa_snaps list) but also 1082a2afb611SJerry Jelinek * the sibling case (e.g. snapshot a/b and a/c so that we will also 1083a2afb611SJerry Jelinek * validate the limit on 'a' using a count of 2). 1084a2afb611SJerry Jelinek * 1085a2afb611SJerry Jelinek * We validate the snapshot names in the third loop and only report 1086a2afb611SJerry Jelinek * name errors once. 1087a2afb611SJerry Jelinek */ 1088a2afb611SJerry Jelinek if (dmu_tx_is_syncing(tx)) { 1089a2afb611SJerry Jelinek nvlist_t *cnt_track = NULL; 1090a2afb611SJerry Jelinek cnt_track = fnvlist_alloc(); 1091a2afb611SJerry Jelinek 1092a2afb611SJerry Jelinek /* Rollup aggregated counts into the cnt_track list */ 1093a2afb611SJerry Jelinek for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 1094a2afb611SJerry Jelinek pair != NULL; 1095a2afb611SJerry Jelinek pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 1096a2afb611SJerry Jelinek char *pdelim; 1097a2afb611SJerry Jelinek uint64_t val; 1098a2afb611SJerry Jelinek char nm[MAXPATHLEN]; 1099a2afb611SJerry Jelinek 1100a2afb611SJerry Jelinek (void) strlcpy(nm, nvpair_name(pair), sizeof (nm)); 1101a2afb611SJerry Jelinek pdelim = strchr(nm, '@'); 1102a2afb611SJerry Jelinek if (pdelim == NULL) 1103a2afb611SJerry Jelinek continue; 1104a2afb611SJerry Jelinek *pdelim = '\0'; 1105a2afb611SJerry Jelinek 1106a2afb611SJerry Jelinek do { 1107a2afb611SJerry Jelinek if (nvlist_lookup_uint64(cnt_track, nm, 1108a2afb611SJerry Jelinek &val) == 0) { 1109a2afb611SJerry Jelinek /* update existing entry */ 1110a2afb611SJerry Jelinek fnvlist_add_uint64(cnt_track, nm, 1111a2afb611SJerry Jelinek val + 1); 1112a2afb611SJerry Jelinek } else { 1113a2afb611SJerry Jelinek /* add to list */ 1114a2afb611SJerry Jelinek fnvlist_add_uint64(cnt_track, nm, 1); 1115a2afb611SJerry Jelinek } 1116a2afb611SJerry Jelinek 1117a2afb611SJerry Jelinek pdelim = strrchr(nm, '/'); 1118a2afb611SJerry Jelinek if (pdelim != NULL) 1119a2afb611SJerry Jelinek *pdelim = '\0'; 1120a2afb611SJerry Jelinek } while (pdelim != NULL); 1121a2afb611SJerry Jelinek } 1122a2afb611SJerry Jelinek 1123a2afb611SJerry Jelinek /* Check aggregated counts at each level */ 1124a2afb611SJerry Jelinek for (pair = nvlist_next_nvpair(cnt_track, NULL); 1125a2afb611SJerry Jelinek pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { 1126a2afb611SJerry Jelinek int error = 0; 1127a2afb611SJerry Jelinek char *name; 1128a2afb611SJerry Jelinek uint64_t cnt = 0; 1129a2afb611SJerry Jelinek dsl_dataset_t *ds; 1130a2afb611SJerry Jelinek 1131a2afb611SJerry Jelinek name = nvpair_name(pair); 1132a2afb611SJerry Jelinek cnt = fnvpair_value_uint64(pair); 1133a2afb611SJerry Jelinek ASSERT(cnt > 0); 1134a2afb611SJerry Jelinek 1135a2afb611SJerry Jelinek error = dsl_dataset_hold(dp, name, FTAG, &ds); 1136a2afb611SJerry Jelinek if (error == 0) { 1137a2afb611SJerry Jelinek error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, 1138a2afb611SJerry Jelinek ZFS_PROP_SNAPSHOT_LIMIT, NULL, 1139a2afb611SJerry Jelinek ddsa->ddsa_cr); 1140a2afb611SJerry Jelinek dsl_dataset_rele(ds, FTAG); 1141a2afb611SJerry Jelinek } 1142a2afb611SJerry Jelinek 1143a2afb611SJerry Jelinek if (error != 0) { 1144a2afb611SJerry Jelinek if (ddsa->ddsa_errors != NULL) 1145a2afb611SJerry Jelinek fnvlist_add_int32(ddsa->ddsa_errors, 1146a2afb611SJerry Jelinek name, error); 1147a2afb611SJerry Jelinek rv = error; 1148a2afb611SJerry Jelinek /* only report one error for this check */ 1149a2afb611SJerry Jelinek break; 1150a2afb611SJerry Jelinek } 1151a2afb611SJerry Jelinek } 1152a2afb611SJerry Jelinek nvlist_free(cnt_track); 1153a2afb611SJerry Jelinek } 1154a2afb611SJerry Jelinek 11553b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 11563b2aab18SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 11573b2aab18SMatthew Ahrens int error = 0; 11583b2aab18SMatthew Ahrens dsl_dataset_t *ds; 11593b2aab18SMatthew Ahrens char *name, *atp; 11603b2aab18SMatthew Ahrens char dsname[MAXNAMELEN]; 11613b2aab18SMatthew Ahrens 11623b2aab18SMatthew Ahrens name = nvpair_name(pair); 11633b2aab18SMatthew Ahrens if (strlen(name) >= MAXNAMELEN) 1164be6fd75aSMatthew Ahrens error = SET_ERROR(ENAMETOOLONG); 11653b2aab18SMatthew Ahrens if (error == 0) { 11663b2aab18SMatthew Ahrens atp = strchr(name, '@'); 11673b2aab18SMatthew Ahrens if (atp == NULL) 1168be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 11693b2aab18SMatthew Ahrens if (error == 0) 11703b2aab18SMatthew Ahrens (void) strlcpy(dsname, name, atp - name + 1); 11713b2aab18SMatthew Ahrens } 11723b2aab18SMatthew Ahrens if (error == 0) 11733b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, dsname, FTAG, &ds); 11743b2aab18SMatthew Ahrens if (error == 0) { 1175a2afb611SJerry Jelinek /* passing 0/NULL skips dsl_fs_ss_limit_check */ 11763b2aab18SMatthew Ahrens error = dsl_dataset_snapshot_check_impl(ds, 1177a2afb611SJerry Jelinek atp + 1, tx, B_FALSE, 0, NULL); 11783b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 11793b2aab18SMatthew Ahrens } 1180745cd3c5Smaybee 11813b2aab18SMatthew Ahrens if (error != 0) { 11823b2aab18SMatthew Ahrens if (ddsa->ddsa_errors != NULL) { 11833b2aab18SMatthew Ahrens fnvlist_add_int32(ddsa->ddsa_errors, 11843b2aab18SMatthew Ahrens name, error); 11853b2aab18SMatthew Ahrens } 11863b2aab18SMatthew Ahrens rv = error; 11873b2aab18SMatthew Ahrens } 11883b2aab18SMatthew Ahrens } 1189a2afb611SJerry Jelinek 11903b2aab18SMatthew Ahrens return (rv); 1191745cd3c5Smaybee } 1192745cd3c5Smaybee 11933b2aab18SMatthew Ahrens void 11943b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, 11953b2aab18SMatthew Ahrens dmu_tx_t *tx) 1196745cd3c5Smaybee { 11973b2aab18SMatthew Ahrens static zil_header_t zero_zil; 1198745cd3c5Smaybee 11993b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 12003b2aab18SMatthew Ahrens dmu_buf_t *dbuf; 12013b2aab18SMatthew Ahrens dsl_dataset_phys_t *dsphys; 12023b2aab18SMatthew Ahrens uint64_t dsobj, crtxg; 12033b2aab18SMatthew Ahrens objset_t *mos = dp->dp_meta_objset; 12043b2aab18SMatthew Ahrens objset_t *os; 1205745cd3c5Smaybee 12063b2aab18SMatthew Ahrens ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); 1207c33e334fSMatthew Ahrens 1208c33e334fSMatthew Ahrens /* 12093b2aab18SMatthew Ahrens * If we are on an old pool, the zil must not be active, in which 12103b2aab18SMatthew Ahrens * case it will be zeroed. Usually zil_suspend() accomplishes this. 1211c33e334fSMatthew Ahrens */ 12123b2aab18SMatthew Ahrens ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || 12133b2aab18SMatthew Ahrens dmu_objset_from_ds(ds, &os) != 0 || 12143b2aab18SMatthew Ahrens bcmp(&os->os_phys->os_zil_header, &zero_zil, 12153b2aab18SMatthew Ahrens sizeof (zero_zil)) == 0); 1216c33e334fSMatthew Ahrens 1217a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); 1218cde58dbcSMatthew Ahrens 1219cde58dbcSMatthew Ahrens /* 12203b2aab18SMatthew Ahrens * The origin's ds_creation_txg has to be < TXG_INITIAL 1221088f3894Sahrens */ 1222088f3894Sahrens if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) 1223088f3894Sahrens crtxg = 1; 1224088f3894Sahrens else 1225088f3894Sahrens crtxg = tx->tx_txg; 1226088f3894Sahrens 12271649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 12281649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 12293b2aab18SMatthew Ahrens VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 1230fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 1231fa9e4066Sahrens dsphys = dbuf->db_data; 1232745cd3c5Smaybee bzero(dsphys, sizeof (dsl_dataset_phys_t)); 12331d452cf5Sahrens dsphys->ds_dir_obj = ds->ds_dir->dd_object; 1234fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 1235fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 1236fa9e4066Sahrens sizeof (dsphys->ds_guid)); 1237c1379625SJustin T. Gibbs dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 1238c1379625SJustin T. Gibbs dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; 1239fa9e4066Sahrens dsphys->ds_next_snap_obj = ds->ds_object; 1240fa9e4066Sahrens dsphys->ds_num_children = 1; 1241fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 1242088f3894Sahrens dsphys->ds_creation_txg = crtxg; 1243c1379625SJustin T. Gibbs dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; 1244c1379625SJustin T. Gibbs dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; 1245c1379625SJustin T. Gibbs dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; 1246c1379625SJustin T. Gibbs dsphys->ds_uncompressed_bytes = 1247c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes; 1248c1379625SJustin T. Gibbs dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; 1249c1379625SJustin T. Gibbs dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; 1250ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 1251fa9e4066Sahrens 1252b5152584SMatthew Ahrens if (ds->ds_large_blocks) 1253b5152584SMatthew Ahrens dsl_dataset_activate_large_blocks_sync_impl(dsobj, tx); 1254b5152584SMatthew Ahrens 1255c1379625SJustin T. Gibbs ASSERT3U(ds->ds_prev != 0, ==, 1256c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); 12571d452cf5Sahrens if (ds->ds_prev) { 1258088f3894Sahrens uint64_t next_clones_obj = 1259c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; 1260c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 1261fa9e4066Sahrens ds->ds_object || 1262c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); 1263c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 1264c1379625SJustin T. Gibbs ds->ds_object) { 12651d452cf5Sahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 1266c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, 1267c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); 1268c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; 1269088f3894Sahrens } else if (next_clones_obj != 0) { 12703b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(ds->ds_prev, 1271c33e334fSMatthew Ahrens dsphys->ds_next_snap_obj, tx); 12723b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 1273088f3894Sahrens next_clones_obj, dsobj, tx)); 1274fa9e4066Sahrens } 1275fa9e4066Sahrens } 1276fa9e4066Sahrens 1277a9799022Sck /* 1278a9799022Sck * If we have a reference-reservation on this dataset, we will 1279a9799022Sck * need to increase the amount of refreservation being charged 1280a9799022Sck * since our unique space is going to zero. 1281a9799022Sck */ 1282a9799022Sck if (ds->ds_reserved) { 12833f9d6ad7SLin Ling int64_t delta; 12843f9d6ad7SLin Ling ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); 1285c1379625SJustin T. Gibbs delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, 1286c1379625SJustin T. Gibbs ds->ds_reserved); 128774e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, 12883f9d6ad7SLin Ling delta, 0, 0, tx); 1289a9799022Sck } 1290a9799022Sck 1291fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1292c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_deadlist_obj = 1293c1379625SJustin T. Gibbs dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, 1294c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); 1295cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 1296c1379625SJustin T. Gibbs dsl_deadlist_open(&ds->ds_deadlist, mos, 1297c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_deadlist_obj); 1298cde58dbcSMatthew Ahrens dsl_deadlist_add_key(&ds->ds_deadlist, 1299c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); 1300cde58dbcSMatthew Ahrens 1301c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); 1302c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; 1303c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; 1304c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes = 0; 1305a9799022Sck if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) 1306c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 1307fa9e4066Sahrens 1308c1379625SJustin T. Gibbs VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, 13093b2aab18SMatthew Ahrens snapname, 8, 1, &dsobj, tx)); 1310fa9e4066Sahrens 1311fa9e4066Sahrens if (ds->ds_prev) 13123b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 13133b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 1314c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); 1315ecd6cf80Smarks 13163f9d6ad7SLin Ling dsl_scan_ds_snapshotted(ds, tx); 1317088f3894Sahrens 131871eb0538SChris Kirby dsl_dir_snap_cmtime_update(ds->ds_dir); 131971eb0538SChris Kirby 13204445fffbSMatthew Ahrens spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, ""); 1321fa9e4066Sahrens } 1322fa9e4066Sahrens 13233b2aab18SMatthew Ahrens static void 13243b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) 1325fa9e4066Sahrens { 13263b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t *ddsa = arg; 13273b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 13283b2aab18SMatthew Ahrens nvpair_t *pair; 132991ebeef5Sahrens 13303b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 13313b2aab18SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 13323b2aab18SMatthew Ahrens dsl_dataset_t *ds; 13333b2aab18SMatthew Ahrens char *name, *atp; 13343b2aab18SMatthew Ahrens char dsname[MAXNAMELEN]; 13353b2aab18SMatthew Ahrens 13363b2aab18SMatthew Ahrens name = nvpair_name(pair); 13373b2aab18SMatthew Ahrens atp = strchr(name, '@'); 13383b2aab18SMatthew Ahrens (void) strlcpy(dsname, name, atp - name + 1); 13393b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); 13403b2aab18SMatthew Ahrens 13413b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); 13423b2aab18SMatthew Ahrens if (ddsa->ddsa_props != NULL) { 13433b2aab18SMatthew Ahrens dsl_props_set_sync_impl(ds->ds_prev, 13443b2aab18SMatthew Ahrens ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); 13453b2aab18SMatthew Ahrens } 13463b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 13473b2aab18SMatthew Ahrens } 1348fa9e4066Sahrens } 1349fa9e4066Sahrens 13503b2aab18SMatthew Ahrens /* 13513b2aab18SMatthew Ahrens * The snapshots must all be in the same pool. 13523b2aab18SMatthew Ahrens * All-or-nothing: if there are any failures, nothing will be modified. 13533b2aab18SMatthew Ahrens */ 13543b2aab18SMatthew Ahrens int 13553b2aab18SMatthew Ahrens dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) 135619b94df9SMatthew Ahrens { 13573b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t ddsa; 13583b2aab18SMatthew Ahrens nvpair_t *pair; 13593b2aab18SMatthew Ahrens boolean_t needsuspend; 13603b2aab18SMatthew Ahrens int error; 13613b2aab18SMatthew Ahrens spa_t *spa; 13623b2aab18SMatthew Ahrens char *firstname; 13633b2aab18SMatthew Ahrens nvlist_t *suspended = NULL; 136419b94df9SMatthew Ahrens 13653b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(snaps, NULL); 13663b2aab18SMatthew Ahrens if (pair == NULL) 13673b2aab18SMatthew Ahrens return (0); 13683b2aab18SMatthew Ahrens firstname = nvpair_name(pair); 13693b2aab18SMatthew Ahrens 13703b2aab18SMatthew Ahrens error = spa_open(firstname, &spa, FTAG); 13713b2aab18SMatthew Ahrens if (error != 0) 13723b2aab18SMatthew Ahrens return (error); 13733b2aab18SMatthew Ahrens needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); 13743b2aab18SMatthew Ahrens spa_close(spa, FTAG); 13753b2aab18SMatthew Ahrens 13763b2aab18SMatthew Ahrens if (needsuspend) { 13773b2aab18SMatthew Ahrens suspended = fnvlist_alloc(); 13783b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 13793b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(snaps, pair)) { 13803b2aab18SMatthew Ahrens char fsname[MAXNAMELEN]; 13813b2aab18SMatthew Ahrens char *snapname = nvpair_name(pair); 13823b2aab18SMatthew Ahrens char *atp; 13833b2aab18SMatthew Ahrens void *cookie; 13843b2aab18SMatthew Ahrens 13853b2aab18SMatthew Ahrens atp = strchr(snapname, '@'); 13863b2aab18SMatthew Ahrens if (atp == NULL) { 1387be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 13883b2aab18SMatthew Ahrens break; 13893b2aab18SMatthew Ahrens } 13903b2aab18SMatthew Ahrens (void) strlcpy(fsname, snapname, atp - snapname + 1); 13913b2aab18SMatthew Ahrens 13923b2aab18SMatthew Ahrens error = zil_suspend(fsname, &cookie); 13933b2aab18SMatthew Ahrens if (error != 0) 13943b2aab18SMatthew Ahrens break; 13953b2aab18SMatthew Ahrens fnvlist_add_uint64(suspended, fsname, 13963b2aab18SMatthew Ahrens (uintptr_t)cookie); 13973b2aab18SMatthew Ahrens } 13983b2aab18SMatthew Ahrens } 13993b2aab18SMatthew Ahrens 14003b2aab18SMatthew Ahrens ddsa.ddsa_snaps = snaps; 14013b2aab18SMatthew Ahrens ddsa.ddsa_props = props; 14023b2aab18SMatthew Ahrens ddsa.ddsa_errors = errors; 1403a2afb611SJerry Jelinek ddsa.ddsa_cr = CRED(); 14043b2aab18SMatthew Ahrens 14053b2aab18SMatthew Ahrens if (error == 0) { 14063b2aab18SMatthew Ahrens error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, 14073b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync, &ddsa, 14087d46dc6cSMatthew Ahrens fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); 14093b2aab18SMatthew Ahrens } 14103b2aab18SMatthew Ahrens 14113b2aab18SMatthew Ahrens if (suspended != NULL) { 14123b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; 14133b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(suspended, pair)) { 14143b2aab18SMatthew Ahrens zil_resume((void *)(uintptr_t) 14153b2aab18SMatthew Ahrens fnvpair_value_uint64(pair)); 14163b2aab18SMatthew Ahrens } 14173b2aab18SMatthew Ahrens fnvlist_free(suspended); 14183b2aab18SMatthew Ahrens } 14193b2aab18SMatthew Ahrens 14203b2aab18SMatthew Ahrens return (error); 14213b2aab18SMatthew Ahrens } 14223b2aab18SMatthew Ahrens 14233b2aab18SMatthew Ahrens typedef struct dsl_dataset_snapshot_tmp_arg { 14243b2aab18SMatthew Ahrens const char *ddsta_fsname; 14253b2aab18SMatthew Ahrens const char *ddsta_snapname; 14263b2aab18SMatthew Ahrens minor_t ddsta_cleanup_minor; 14273b2aab18SMatthew Ahrens const char *ddsta_htag; 14283b2aab18SMatthew Ahrens } dsl_dataset_snapshot_tmp_arg_t; 14293b2aab18SMatthew Ahrens 14303b2aab18SMatthew Ahrens static int 14313b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) 14323b2aab18SMatthew Ahrens { 14333b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; 14343b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 14353b2aab18SMatthew Ahrens dsl_dataset_t *ds; 14363b2aab18SMatthew Ahrens int error; 14373b2aab18SMatthew Ahrens 14383b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); 14393b2aab18SMatthew Ahrens if (error != 0) 14403b2aab18SMatthew Ahrens return (error); 14413b2aab18SMatthew Ahrens 1442a2afb611SJerry Jelinek /* NULL cred means no limit check for tmp snapshot */ 1443ca48f36fSKeith M Wesolowski error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, 1444a2afb611SJerry Jelinek tx, B_FALSE, 0, NULL); 14453b2aab18SMatthew Ahrens if (error != 0) { 14463b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 14473b2aab18SMatthew Ahrens return (error); 14483b2aab18SMatthew Ahrens } 14493b2aab18SMatthew Ahrens 14503b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { 14513b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 1452be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 14533b2aab18SMatthew Ahrens } 14543b2aab18SMatthew Ahrens error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, 14553b2aab18SMatthew Ahrens B_TRUE, tx); 14563b2aab18SMatthew Ahrens if (error != 0) { 14573b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 14583b2aab18SMatthew Ahrens return (error); 14593b2aab18SMatthew Ahrens } 14603b2aab18SMatthew Ahrens 14613b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 14623b2aab18SMatthew Ahrens return (0); 14633b2aab18SMatthew Ahrens } 14643b2aab18SMatthew Ahrens 14653b2aab18SMatthew Ahrens static void 14663b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) 14673b2aab18SMatthew Ahrens { 14683b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; 14693b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 14703b2aab18SMatthew Ahrens dsl_dataset_t *ds; 14713b2aab18SMatthew Ahrens 14723b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); 14733b2aab18SMatthew Ahrens 14743b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); 14753b2aab18SMatthew Ahrens dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, 14763b2aab18SMatthew Ahrens ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); 14773b2aab18SMatthew Ahrens dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); 14783b2aab18SMatthew Ahrens 14793b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 14803b2aab18SMatthew Ahrens } 14813b2aab18SMatthew Ahrens 14823b2aab18SMatthew Ahrens int 14833b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, 14843b2aab18SMatthew Ahrens minor_t cleanup_minor, const char *htag) 14853b2aab18SMatthew Ahrens { 14863b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t ddsta; 14873b2aab18SMatthew Ahrens int error; 14883b2aab18SMatthew Ahrens spa_t *spa; 14893b2aab18SMatthew Ahrens boolean_t needsuspend; 14903b2aab18SMatthew Ahrens void *cookie; 14913b2aab18SMatthew Ahrens 14923b2aab18SMatthew Ahrens ddsta.ddsta_fsname = fsname; 14933b2aab18SMatthew Ahrens ddsta.ddsta_snapname = snapname; 14943b2aab18SMatthew Ahrens ddsta.ddsta_cleanup_minor = cleanup_minor; 14953b2aab18SMatthew Ahrens ddsta.ddsta_htag = htag; 14963b2aab18SMatthew Ahrens 14973b2aab18SMatthew Ahrens error = spa_open(fsname, &spa, FTAG); 14983b2aab18SMatthew Ahrens if (error != 0) 14993b2aab18SMatthew Ahrens return (error); 15003b2aab18SMatthew Ahrens needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); 15013b2aab18SMatthew Ahrens spa_close(spa, FTAG); 15023b2aab18SMatthew Ahrens 15033b2aab18SMatthew Ahrens if (needsuspend) { 15043b2aab18SMatthew Ahrens error = zil_suspend(fsname, &cookie); 15053b2aab18SMatthew Ahrens if (error != 0) 15063b2aab18SMatthew Ahrens return (error); 15073b2aab18SMatthew Ahrens } 15083b2aab18SMatthew Ahrens 15093b2aab18SMatthew Ahrens error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, 15107d46dc6cSMatthew Ahrens dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); 15113b2aab18SMatthew Ahrens 15123b2aab18SMatthew Ahrens if (needsuspend) 15133b2aab18SMatthew Ahrens zil_resume(cookie); 15143b2aab18SMatthew Ahrens return (error); 15153b2aab18SMatthew Ahrens } 15163b2aab18SMatthew Ahrens 15173b2aab18SMatthew Ahrens 15183b2aab18SMatthew Ahrens void 15193b2aab18SMatthew Ahrens dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) 15203b2aab18SMatthew Ahrens { 15213b2aab18SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 15223b2aab18SMatthew Ahrens ASSERT(ds->ds_objset != NULL); 1523c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); 15243b2aab18SMatthew Ahrens 15253b2aab18SMatthew Ahrens /* 15263b2aab18SMatthew Ahrens * in case we had to change ds_fsid_guid when we opened it, 15273b2aab18SMatthew Ahrens * sync it out now. 15283b2aab18SMatthew Ahrens */ 15293b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1530c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; 15313b2aab18SMatthew Ahrens 15323b2aab18SMatthew Ahrens dmu_objset_sync(ds->ds_objset, zio, tx); 1533b5152584SMatthew Ahrens 1534b5152584SMatthew Ahrens if (ds->ds_need_large_blocks && !ds->ds_large_blocks) { 1535b5152584SMatthew Ahrens dsl_dataset_activate_large_blocks_sync_impl(ds->ds_object, tx); 1536b5152584SMatthew Ahrens ds->ds_large_blocks = B_TRUE; 1537b5152584SMatthew Ahrens } 15383b2aab18SMatthew Ahrens } 15393b2aab18SMatthew Ahrens 15403b2aab18SMatthew Ahrens static void 15413b2aab18SMatthew Ahrens get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) 15423b2aab18SMatthew Ahrens { 15433b2aab18SMatthew Ahrens uint64_t count = 0; 15443b2aab18SMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 15453b2aab18SMatthew Ahrens zap_cursor_t zc; 15463b2aab18SMatthew Ahrens zap_attribute_t za; 15473b2aab18SMatthew Ahrens nvlist_t *propval = fnvlist_alloc(); 15483b2aab18SMatthew Ahrens nvlist_t *val = fnvlist_alloc(); 15493b2aab18SMatthew Ahrens 15503b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 155119b94df9SMatthew Ahrens 155219b94df9SMatthew Ahrens /* 15533b2aab18SMatthew Ahrens * There may be missing entries in ds_next_clones_obj 155419b94df9SMatthew Ahrens * due to a bug in a previous version of the code. 155519b94df9SMatthew Ahrens * Only trust it if it has the right number of entries. 155619b94df9SMatthew Ahrens */ 1557c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { 1558c1379625SJustin T. Gibbs VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 155919b94df9SMatthew Ahrens &count)); 156019b94df9SMatthew Ahrens } 1561c1379625SJustin T. Gibbs if (count != dsl_dataset_phys(ds)->ds_num_children - 1) 156219b94df9SMatthew Ahrens goto fail; 1563c1379625SJustin T. Gibbs for (zap_cursor_init(&zc, mos, 1564c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_next_clones_obj); 156519b94df9SMatthew Ahrens zap_cursor_retrieve(&zc, &za) == 0; 156619b94df9SMatthew Ahrens zap_cursor_advance(&zc)) { 156719b94df9SMatthew Ahrens dsl_dataset_t *clone; 156819b94df9SMatthew Ahrens char buf[ZFS_MAXNAMELEN]; 15693b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, 15703b2aab18SMatthew Ahrens za.za_first_integer, FTAG, &clone)); 157119b94df9SMatthew Ahrens dsl_dir_name(clone->ds_dir, buf); 15723b2aab18SMatthew Ahrens fnvlist_add_boolean(val, buf); 157319b94df9SMatthew Ahrens dsl_dataset_rele(clone, FTAG); 157419b94df9SMatthew Ahrens } 157519b94df9SMatthew Ahrens zap_cursor_fini(&zc); 15763b2aab18SMatthew Ahrens fnvlist_add_nvlist(propval, ZPROP_VALUE, val); 15773b2aab18SMatthew Ahrens fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), propval); 157819b94df9SMatthew Ahrens fail: 157919b94df9SMatthew Ahrens nvlist_free(val); 158019b94df9SMatthew Ahrens nvlist_free(propval); 158119b94df9SMatthew Ahrens } 158219b94df9SMatthew Ahrens 1583fa9e4066Sahrens void 1584a2eea2e1Sahrens dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) 1585fa9e4066Sahrens { 15863b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 1587187d6ac0SMatt Ahrens uint64_t refd, avail, uobjs, aobjs, ratio; 1588a9799022Sck 15893b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 15903b2aab18SMatthew Ahrens 1591c1379625SJustin T. Gibbs ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : 1592c1379625SJustin T. Gibbs (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / 1593c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_compressed_bytes); 15944445fffbSMatthew Ahrens 15954445fffbSMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, ratio); 159677372cb0SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, 1597c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes); 15984445fffbSMatthew Ahrens 1599*bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 16004445fffbSMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, ratio); 16014445fffbSMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, 1602c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes); 16034445fffbSMatthew Ahrens get_clones_stat(ds, nv); 16044445fffbSMatthew Ahrens } else { 1605b461c746SMatthew Ahrens if (ds->ds_prev != NULL && ds->ds_prev != dp->dp_origin_snap) { 1606b461c746SMatthew Ahrens char buf[MAXNAMELEN]; 1607b461c746SMatthew Ahrens dsl_dataset_name(ds->ds_prev, buf); 1608b461c746SMatthew Ahrens dsl_prop_nvlist_add_string(nv, ZFS_PROP_PREV_SNAP, buf); 1609b461c746SMatthew Ahrens } 1610b461c746SMatthew Ahrens 16114445fffbSMatthew Ahrens dsl_dir_stats(ds->ds_dir, nv); 16124445fffbSMatthew Ahrens } 1613fa9e4066Sahrens 1614a9799022Sck dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); 1615a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); 1616a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); 1617a9799022Sck 1618a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, 1619c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_creation_time); 1620a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, 1621c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_creation_txg); 1622a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, 1623a9799022Sck ds->ds_quota); 1624a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, 1625a9799022Sck ds->ds_reserved); 1626c5904d13Seschrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, 1627c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_guid); 16281d713200SEric Schrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, 1629c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes); 16301d713200SEric Schrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, 16311d713200SEric Schrock ds->ds_object); 163292241e0bSTom Erickson dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, 163392241e0bSTom Erickson ds->ds_userrefs); 1634842727c2SChris Kirby dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, 1635842727c2SChris Kirby DS_IS_DEFER_DESTROY(ds) ? 1 : 0); 1636fa9e4066Sahrens 1637c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { 163819b94df9SMatthew Ahrens uint64_t written, comp, uncomp; 163919b94df9SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 164019b94df9SMatthew Ahrens dsl_dataset_t *prev; 164119b94df9SMatthew Ahrens 164219b94df9SMatthew Ahrens int err = dsl_dataset_hold_obj(dp, 1643c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); 164419b94df9SMatthew Ahrens if (err == 0) { 164519b94df9SMatthew Ahrens err = dsl_dataset_space_written(prev, ds, &written, 164619b94df9SMatthew Ahrens &comp, &uncomp); 164719b94df9SMatthew Ahrens dsl_dataset_rele(prev, FTAG); 164819b94df9SMatthew Ahrens if (err == 0) { 164919b94df9SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, 165019b94df9SMatthew Ahrens written); 165119b94df9SMatthew Ahrens } 165219b94df9SMatthew Ahrens } 165319b94df9SMatthew Ahrens } 1654fa9e4066Sahrens } 1655fa9e4066Sahrens 1656a2eea2e1Sahrens void 1657a2eea2e1Sahrens dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) 1658a2eea2e1Sahrens { 16593b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 16603b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 16613b2aab18SMatthew Ahrens 1662c1379625SJustin T. Gibbs stat->dds_creation_txg = dsl_dataset_phys(ds)->ds_creation_txg; 1663c1379625SJustin T. Gibbs stat->dds_inconsistent = 1664c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT; 1665c1379625SJustin T. Gibbs stat->dds_guid = dsl_dataset_phys(ds)->ds_guid; 16664445fffbSMatthew Ahrens stat->dds_origin[0] = '\0'; 1667*bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 1668a2eea2e1Sahrens stat->dds_is_snapshot = B_TRUE; 1669c1379625SJustin T. Gibbs stat->dds_num_clones = 1670c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_num_children - 1; 1671ebedde84SEric Taylor } else { 1672ebedde84SEric Taylor stat->dds_is_snapshot = B_FALSE; 1673ebedde84SEric Taylor stat->dds_num_clones = 0; 1674a2eea2e1Sahrens 16754445fffbSMatthew Ahrens if (dsl_dir_is_clone(ds->ds_dir)) { 16764445fffbSMatthew Ahrens dsl_dataset_t *ods; 1677a2eea2e1Sahrens 16783b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 1679c1379625SJustin T. Gibbs dsl_dir_phys(ds->ds_dir)->dd_origin_obj, 1680c1379625SJustin T. Gibbs FTAG, &ods)); 16814445fffbSMatthew Ahrens dsl_dataset_name(ods, stat->dds_origin); 16823b2aab18SMatthew Ahrens dsl_dataset_rele(ods, FTAG); 16834445fffbSMatthew Ahrens } 1684a2eea2e1Sahrens } 1685a2eea2e1Sahrens } 1686a2eea2e1Sahrens 1687a2eea2e1Sahrens uint64_t 1688a2eea2e1Sahrens dsl_dataset_fsid_guid(dsl_dataset_t *ds) 1689a2eea2e1Sahrens { 169091ebeef5Sahrens return (ds->ds_fsid_guid); 1691a2eea2e1Sahrens } 1692a2eea2e1Sahrens 1693a2eea2e1Sahrens void 1694a2eea2e1Sahrens dsl_dataset_space(dsl_dataset_t *ds, 1695a2eea2e1Sahrens uint64_t *refdbytesp, uint64_t *availbytesp, 1696a2eea2e1Sahrens uint64_t *usedobjsp, uint64_t *availobjsp) 1697fa9e4066Sahrens { 1698c1379625SJustin T. Gibbs *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; 1699a2eea2e1Sahrens *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); 1700c1379625SJustin T. Gibbs if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) 1701c1379625SJustin T. Gibbs *availbytesp += 1702c1379625SJustin T. Gibbs ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; 1703a9799022Sck if (ds->ds_quota != 0) { 1704a9799022Sck /* 1705a9799022Sck * Adjust available bytes according to refquota 1706a9799022Sck */ 1707a9799022Sck if (*refdbytesp < ds->ds_quota) 1708a9799022Sck *availbytesp = MIN(*availbytesp, 1709a9799022Sck ds->ds_quota - *refdbytesp); 1710a9799022Sck else 1711a9799022Sck *availbytesp = 0; 1712a9799022Sck } 1713c1379625SJustin T. Gibbs *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); 1714a2eea2e1Sahrens *availobjsp = DN_MAX_OBJECT - *usedobjsp; 1715fa9e4066Sahrens } 1716fa9e4066Sahrens 1717f18faf3fSek boolean_t 171834f2f8cfSMatthew Ahrens dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) 1719f18faf3fSek { 1720f18faf3fSek dsl_pool_t *dp = ds->ds_dir->dd_pool; 1721f18faf3fSek 17223b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 172334f2f8cfSMatthew Ahrens if (snap == NULL) 1724f18faf3fSek return (B_FALSE); 1725c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_bp.blk_birth > 1726c1379625SJustin T. Gibbs dsl_dataset_phys(snap)->ds_creation_txg) { 172734f2f8cfSMatthew Ahrens objset_t *os, *os_snap; 17286e0cbcaaSMatthew Ahrens /* 17296e0cbcaaSMatthew Ahrens * It may be that only the ZIL differs, because it was 17306e0cbcaaSMatthew Ahrens * reset in the head. Don't count that as being 17316e0cbcaaSMatthew Ahrens * modified. 17326e0cbcaaSMatthew Ahrens */ 17336e0cbcaaSMatthew Ahrens if (dmu_objset_from_ds(ds, &os) != 0) 17346e0cbcaaSMatthew Ahrens return (B_TRUE); 173534f2f8cfSMatthew Ahrens if (dmu_objset_from_ds(snap, &os_snap) != 0) 17366e0cbcaaSMatthew Ahrens return (B_TRUE); 17376e0cbcaaSMatthew Ahrens return (bcmp(&os->os_phys->os_meta_dnode, 173834f2f8cfSMatthew Ahrens &os_snap->os_phys->os_meta_dnode, 17396e0cbcaaSMatthew Ahrens sizeof (os->os_phys->os_meta_dnode)) != 0); 17406e0cbcaaSMatthew Ahrens } 1741f18faf3fSek return (B_FALSE); 1742f18faf3fSek } 1743f18faf3fSek 17443b2aab18SMatthew Ahrens typedef struct dsl_dataset_rename_snapshot_arg { 17453b2aab18SMatthew Ahrens const char *ddrsa_fsname; 17463b2aab18SMatthew Ahrens const char *ddrsa_oldsnapname; 17473b2aab18SMatthew Ahrens const char *ddrsa_newsnapname; 17483b2aab18SMatthew Ahrens boolean_t ddrsa_recursive; 17493b2aab18SMatthew Ahrens dmu_tx_t *ddrsa_tx; 17503b2aab18SMatthew Ahrens } dsl_dataset_rename_snapshot_arg_t; 17513b2aab18SMatthew Ahrens 17521d452cf5Sahrens /* ARGSUSED */ 1753fa9e4066Sahrens static int 17543b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, 17553b2aab18SMatthew Ahrens dsl_dataset_t *hds, void *arg) 1756fa9e4066Sahrens { 17573b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 17583b2aab18SMatthew Ahrens int error; 1759fa9e4066Sahrens uint64_t val; 1760fa9e4066Sahrens 17613b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); 17623b2aab18SMatthew Ahrens if (error != 0) { 17633b2aab18SMatthew Ahrens /* ignore nonexistent snapshots */ 17643b2aab18SMatthew Ahrens return (error == ENOENT ? 0 : error); 17653b2aab18SMatthew Ahrens } 17661d452cf5Sahrens 17673b2aab18SMatthew Ahrens /* new name should not exist */ 17683b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); 17693b2aab18SMatthew Ahrens if (error == 0) 1770be6fd75aSMatthew Ahrens error = SET_ERROR(EEXIST); 17713b2aab18SMatthew Ahrens else if (error == ENOENT) 17723b2aab18SMatthew Ahrens error = 0; 1773cdf5b4caSmmusante 1774cdf5b4caSmmusante /* dataset name + 1 for the "@" + the new snapshot name must fit */ 17753b2aab18SMatthew Ahrens if (dsl_dir_namelen(hds->ds_dir) + 1 + 17763b2aab18SMatthew Ahrens strlen(ddrsa->ddrsa_newsnapname) >= MAXNAMELEN) 1777be6fd75aSMatthew Ahrens error = SET_ERROR(ENAMETOOLONG); 1778cdf5b4caSmmusante 17793b2aab18SMatthew Ahrens return (error); 17801d452cf5Sahrens } 1781fa9e4066Sahrens 17823b2aab18SMatthew Ahrens static int 17833b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) 17841d452cf5Sahrens { 17853b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 17863b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 17871d452cf5Sahrens dsl_dataset_t *hds; 17883b2aab18SMatthew Ahrens int error; 1789fa9e4066Sahrens 17903b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); 17913b2aab18SMatthew Ahrens if (error != 0) 17923b2aab18SMatthew Ahrens return (error); 1793fa9e4066Sahrens 17943b2aab18SMatthew Ahrens if (ddrsa->ddrsa_recursive) { 17953b2aab18SMatthew Ahrens error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, 17963b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check_impl, ddrsa, 17973b2aab18SMatthew Ahrens DS_FIND_CHILDREN); 17983b2aab18SMatthew Ahrens } else { 17993b2aab18SMatthew Ahrens error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); 18003b2aab18SMatthew Ahrens } 1801745cd3c5Smaybee dsl_dataset_rele(hds, FTAG); 18023b2aab18SMatthew Ahrens return (error); 1803fa9e4066Sahrens } 1804fa9e4066Sahrens 1805cdf5b4caSmmusante static int 18063b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, 18073b2aab18SMatthew Ahrens dsl_dataset_t *hds, void *arg) 1808cdf5b4caSmmusante { 18093b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 18103b2aab18SMatthew Ahrens dsl_dataset_t *ds; 18113b2aab18SMatthew Ahrens uint64_t val; 18123b2aab18SMatthew Ahrens dmu_tx_t *tx = ddrsa->ddrsa_tx; 18133b2aab18SMatthew Ahrens int error; 1814ecd6cf80Smarks 18153b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); 18163b2aab18SMatthew Ahrens ASSERT(error == 0 || error == ENOENT); 18173b2aab18SMatthew Ahrens if (error == ENOENT) { 18183b2aab18SMatthew Ahrens /* ignore nonexistent snapshots */ 18193b2aab18SMatthew Ahrens return (0); 1820ecd6cf80Smarks } 1821ecd6cf80Smarks 18223b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); 18233b2aab18SMatthew Ahrens 18243b2aab18SMatthew Ahrens /* log before we change the name */ 18253b2aab18SMatthew Ahrens spa_history_log_internal_ds(ds, "rename", tx, 18263b2aab18SMatthew Ahrens "-> @%s", ddrsa->ddrsa_newsnapname); 1827cdf5b4caSmmusante 1828a2afb611SJerry Jelinek VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, 1829a2afb611SJerry Jelinek B_FALSE)); 18303b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 18313b2aab18SMatthew Ahrens (void) strcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname); 18323b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 1833c1379625SJustin T. Gibbs VERIFY0(zap_add(dp->dp_meta_objset, 1834c1379625SJustin T. Gibbs dsl_dataset_phys(hds)->ds_snapnames_zapobj, 18353b2aab18SMatthew Ahrens ds->ds_snapname, 8, 1, &ds->ds_object, tx)); 1836cdf5b4caSmmusante 18373b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 1838cdf5b4caSmmusante return (0); 1839cdf5b4caSmmusante } 1840cdf5b4caSmmusante 18413b2aab18SMatthew Ahrens static void 18423b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) 1843cdf5b4caSmmusante { 18443b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 18453b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 18463b2aab18SMatthew Ahrens dsl_dataset_t *hds; 1847cdf5b4caSmmusante 18483b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); 18493b2aab18SMatthew Ahrens ddrsa->ddrsa_tx = tx; 18503b2aab18SMatthew Ahrens if (ddrsa->ddrsa_recursive) { 18513b2aab18SMatthew Ahrens VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, 18523b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync_impl, ddrsa, 18533b2aab18SMatthew Ahrens DS_FIND_CHILDREN)); 18543b2aab18SMatthew Ahrens } else { 18553b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); 1856cdf5b4caSmmusante } 18573b2aab18SMatthew Ahrens dsl_dataset_rele(hds, FTAG); 1858cdf5b4caSmmusante } 1859cdf5b4caSmmusante 18603b2aab18SMatthew Ahrens int 18613b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot(const char *fsname, 18623b2aab18SMatthew Ahrens const char *oldsnapname, const char *newsnapname, boolean_t recursive) 18633a5a36beSmmusante { 18643b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t ddrsa; 18653a5a36beSmmusante 18663b2aab18SMatthew Ahrens ddrsa.ddrsa_fsname = fsname; 18673b2aab18SMatthew Ahrens ddrsa.ddrsa_oldsnapname = oldsnapname; 18683b2aab18SMatthew Ahrens ddrsa.ddrsa_newsnapname = newsnapname; 18693b2aab18SMatthew Ahrens ddrsa.ddrsa_recursive = recursive; 18703a5a36beSmmusante 18713b2aab18SMatthew Ahrens return (dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, 18727d46dc6cSMatthew Ahrens dsl_dataset_rename_snapshot_sync, &ddrsa, 18737d46dc6cSMatthew Ahrens 1, ZFS_SPACE_CHECK_RESERVED)); 18743a5a36beSmmusante } 18753a5a36beSmmusante 187691948b51SKeith M Wesolowski /* 187791948b51SKeith M Wesolowski * If we're doing an ownership handoff, we need to make sure that there is 187891948b51SKeith M Wesolowski * only one long hold on the dataset. We're not allowed to change anything here 187991948b51SKeith M Wesolowski * so we don't permanently release the long hold or regular hold here. We want 188091948b51SKeith M Wesolowski * to do this only when syncing to avoid the dataset unexpectedly going away 188191948b51SKeith M Wesolowski * when we release the long hold. 188291948b51SKeith M Wesolowski */ 188391948b51SKeith M Wesolowski static int 188491948b51SKeith M Wesolowski dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) 188591948b51SKeith M Wesolowski { 188691948b51SKeith M Wesolowski boolean_t held; 188791948b51SKeith M Wesolowski 188891948b51SKeith M Wesolowski if (!dmu_tx_is_syncing(tx)) 188991948b51SKeith M Wesolowski return (0); 189091948b51SKeith M Wesolowski 189191948b51SKeith M Wesolowski if (owner != NULL) { 189291948b51SKeith M Wesolowski VERIFY3P(ds->ds_owner, ==, owner); 189391948b51SKeith M Wesolowski dsl_dataset_long_rele(ds, owner); 189491948b51SKeith M Wesolowski } 189591948b51SKeith M Wesolowski 189691948b51SKeith M Wesolowski held = dsl_dataset_long_held(ds); 189791948b51SKeith M Wesolowski 189891948b51SKeith M Wesolowski if (owner != NULL) 189991948b51SKeith M Wesolowski dsl_dataset_long_hold(ds, owner); 190091948b51SKeith M Wesolowski 190191948b51SKeith M Wesolowski if (held) 190291948b51SKeith M Wesolowski return (SET_ERROR(EBUSY)); 190391948b51SKeith M Wesolowski 190491948b51SKeith M Wesolowski return (0); 190591948b51SKeith M Wesolowski } 190691948b51SKeith M Wesolowski 190791948b51SKeith M Wesolowski typedef struct dsl_dataset_rollback_arg { 190891948b51SKeith M Wesolowski const char *ddra_fsname; 190991948b51SKeith M Wesolowski void *ddra_owner; 1910a7027df1SMatthew Ahrens nvlist_t *ddra_result; 191191948b51SKeith M Wesolowski } dsl_dataset_rollback_arg_t; 191291948b51SKeith M Wesolowski 19133b2aab18SMatthew Ahrens static int 19143b2aab18SMatthew Ahrens dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) 1915fa9e4066Sahrens { 191691948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t *ddra = arg; 19173b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 19181d452cf5Sahrens dsl_dataset_t *ds; 19193b2aab18SMatthew Ahrens int64_t unused_refres_delta; 19203b2aab18SMatthew Ahrens int error; 1921fa9e4066Sahrens 192291948b51SKeith M Wesolowski error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); 19233b2aab18SMatthew Ahrens if (error != 0) 19243b2aab18SMatthew Ahrens return (error); 1925370c1af0SSanjeev Bagewadi 19263b2aab18SMatthew Ahrens /* must not be a snapshot */ 1927*bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 19283b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 1929be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 19303b2aab18SMatthew Ahrens } 19313a5a36beSmmusante 19323b2aab18SMatthew Ahrens /* must have a most recent snapshot */ 1933c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { 19343b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 1935be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 19363b2aab18SMatthew Ahrens } 19373a5a36beSmmusante 193878f17100SMatthew Ahrens /* must not have any bookmarks after the most recent snapshot */ 193978f17100SMatthew Ahrens nvlist_t *proprequest = fnvlist_alloc(); 194078f17100SMatthew Ahrens fnvlist_add_boolean(proprequest, zfs_prop_to_name(ZFS_PROP_CREATETXG)); 194178f17100SMatthew Ahrens nvlist_t *bookmarks = fnvlist_alloc(); 194278f17100SMatthew Ahrens error = dsl_get_bookmarks_impl(ds, proprequest, bookmarks); 194378f17100SMatthew Ahrens fnvlist_free(proprequest); 194478f17100SMatthew Ahrens if (error != 0) 194578f17100SMatthew Ahrens return (error); 194678f17100SMatthew Ahrens for (nvpair_t *pair = nvlist_next_nvpair(bookmarks, NULL); 194778f17100SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(bookmarks, pair)) { 194878f17100SMatthew Ahrens nvlist_t *valuenv = 194978f17100SMatthew Ahrens fnvlist_lookup_nvlist(fnvpair_value_nvlist(pair), 195078f17100SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_CREATETXG)); 195178f17100SMatthew Ahrens uint64_t createtxg = fnvlist_lookup_uint64(valuenv, "value"); 1952c1379625SJustin T. Gibbs if (createtxg > dsl_dataset_phys(ds)->ds_prev_snap_txg) { 195378f17100SMatthew Ahrens fnvlist_free(bookmarks); 195478f17100SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 195578f17100SMatthew Ahrens return (SET_ERROR(EEXIST)); 195678f17100SMatthew Ahrens } 195778f17100SMatthew Ahrens } 195878f17100SMatthew Ahrens fnvlist_free(bookmarks); 195978f17100SMatthew Ahrens 196091948b51SKeith M Wesolowski error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); 196191948b51SKeith M Wesolowski if (error != 0) { 19623b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 196391948b51SKeith M Wesolowski return (error); 19643b2aab18SMatthew Ahrens } 19653b2aab18SMatthew Ahrens 19663b2aab18SMatthew Ahrens /* 19673b2aab18SMatthew Ahrens * Check if the snap we are rolling back to uses more than 19683b2aab18SMatthew Ahrens * the refquota. 19693b2aab18SMatthew Ahrens */ 19703b2aab18SMatthew Ahrens if (ds->ds_quota != 0 && 1971c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { 19723b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 1973be6fd75aSMatthew Ahrens return (SET_ERROR(EDQUOT)); 1974fa9e4066Sahrens } 1975370c1af0SSanjeev Bagewadi 19763b2aab18SMatthew Ahrens /* 19773b2aab18SMatthew Ahrens * When we do the clone swap, we will temporarily use more space 19783b2aab18SMatthew Ahrens * due to the refreservation (the head will no longer have any 19793b2aab18SMatthew Ahrens * unique space, so the entire amount of the refreservation will need 19803b2aab18SMatthew Ahrens * to be free). We will immediately destroy the clone, freeing 19813b2aab18SMatthew Ahrens * this space, but the freeing happens over many txg's. 19823b2aab18SMatthew Ahrens */ 19833b2aab18SMatthew Ahrens unused_refres_delta = (int64_t)MIN(ds->ds_reserved, 1984c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes); 19853b2aab18SMatthew Ahrens 19863b2aab18SMatthew Ahrens if (unused_refres_delta > 0 && 19873b2aab18SMatthew Ahrens unused_refres_delta > 19883b2aab18SMatthew Ahrens dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { 19893b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 1990be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 1991fa9e4066Sahrens } 1992fa9e4066Sahrens 19933b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 19943b2aab18SMatthew Ahrens return (0); 19953b2aab18SMatthew Ahrens } 19961d452cf5Sahrens 19973b2aab18SMatthew Ahrens static void 19983b2aab18SMatthew Ahrens dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) 19993b2aab18SMatthew Ahrens { 200091948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t *ddra = arg; 20013b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 20023b2aab18SMatthew Ahrens dsl_dataset_t *ds, *clone; 20033b2aab18SMatthew Ahrens uint64_t cloneobj; 2004a7027df1SMatthew Ahrens char namebuf[ZFS_MAXNAMELEN]; 20051d452cf5Sahrens 200691948b51SKeith M Wesolowski VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); 20071d452cf5Sahrens 2008a7027df1SMatthew Ahrens dsl_dataset_name(ds->ds_prev, namebuf); 2009a7027df1SMatthew Ahrens fnvlist_add_string(ddra->ddra_result, "target", namebuf); 2010a7027df1SMatthew Ahrens 20113b2aab18SMatthew Ahrens cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", 20123b2aab18SMatthew Ahrens ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, tx); 20131d452cf5Sahrens 20143b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); 20151d452cf5Sahrens 20163b2aab18SMatthew Ahrens dsl_dataset_clone_swap_sync_impl(clone, ds, tx); 20173b2aab18SMatthew Ahrens dsl_dataset_zero_zil(ds, tx); 20183b2aab18SMatthew Ahrens 20193b2aab18SMatthew Ahrens dsl_destroy_head_sync_impl(clone, tx); 20203b2aab18SMatthew Ahrens 20213b2aab18SMatthew Ahrens dsl_dataset_rele(clone, FTAG); 20223b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 20233b2aab18SMatthew Ahrens } 20243b2aab18SMatthew Ahrens 202591948b51SKeith M Wesolowski /* 2026a7027df1SMatthew Ahrens * Rolls back the given filesystem or volume to the most recent snapshot. 2027a7027df1SMatthew Ahrens * The name of the most recent snapshot will be returned under key "target" 2028a7027df1SMatthew Ahrens * in the result nvlist. 202991948b51SKeith M Wesolowski * 2030a7027df1SMatthew Ahrens * If owner != NULL: 203191948b51SKeith M Wesolowski * - The existing dataset MUST be owned by the specified owner at entry 203291948b51SKeith M Wesolowski * - Upon return, dataset will still be held by the same owner, whether we 203391948b51SKeith M Wesolowski * succeed or not. 203491948b51SKeith M Wesolowski * 203591948b51SKeith M Wesolowski * This mode is required any time the existing filesystem is mounted. See 203691948b51SKeith M Wesolowski * notes above zfs_suspend_fs() for further details. 203791948b51SKeith M Wesolowski */ 20383b2aab18SMatthew Ahrens int 2039a7027df1SMatthew Ahrens dsl_dataset_rollback(const char *fsname, void *owner, nvlist_t *result) 20403b2aab18SMatthew Ahrens { 204191948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t ddra; 204291948b51SKeith M Wesolowski 204391948b51SKeith M Wesolowski ddra.ddra_fsname = fsname; 204491948b51SKeith M Wesolowski ddra.ddra_owner = owner; 2045a7027df1SMatthew Ahrens ddra.ddra_result = result; 204691948b51SKeith M Wesolowski 20473b2aab18SMatthew Ahrens return (dsl_sync_task(fsname, dsl_dataset_rollback_check, 20487d46dc6cSMatthew Ahrens dsl_dataset_rollback_sync, &ddra, 20497d46dc6cSMatthew Ahrens 1, ZFS_SPACE_CHECK_RESERVED)); 2050fa9e4066Sahrens } 205199653d4eSeschrock 2052088f3894Sahrens struct promotenode { 2053745cd3c5Smaybee list_node_t link; 2054745cd3c5Smaybee dsl_dataset_t *ds; 2055745cd3c5Smaybee }; 2056745cd3c5Smaybee 20573b2aab18SMatthew Ahrens typedef struct dsl_dataset_promote_arg { 20583b2aab18SMatthew Ahrens const char *ddpa_clonename; 20593b2aab18SMatthew Ahrens dsl_dataset_t *ddpa_clone; 206074e7dc98SMatthew Ahrens list_t shared_snaps, origin_snaps, clone_snaps; 20613b2aab18SMatthew Ahrens dsl_dataset_t *origin_origin; /* origin of the origin */ 206274e7dc98SMatthew Ahrens uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap; 2063681d9761SEric Taylor char *err_ds; 2064a2afb611SJerry Jelinek cred_t *cr; 20653b2aab18SMatthew Ahrens } dsl_dataset_promote_arg_t; 20661d452cf5Sahrens 206774e7dc98SMatthew Ahrens static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); 20683b2aab18SMatthew Ahrens static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, 20693b2aab18SMatthew Ahrens void *tag); 20703b2aab18SMatthew Ahrens static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); 207174e7dc98SMatthew Ahrens 207299653d4eSeschrock static int 20733b2aab18SMatthew Ahrens dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) 207499653d4eSeschrock { 20753b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t *ddpa = arg; 20763b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 20773b2aab18SMatthew Ahrens dsl_dataset_t *hds; 20783b2aab18SMatthew Ahrens struct promotenode *snap; 20793b2aab18SMatthew Ahrens dsl_dataset_t *origin_ds; 2080745cd3c5Smaybee int err; 2081cde58dbcSMatthew Ahrens uint64_t unused; 2082a2afb611SJerry Jelinek uint64_t ss_mv_cnt; 20831d452cf5Sahrens 20843b2aab18SMatthew Ahrens err = promote_hold(ddpa, dp, FTAG); 20853b2aab18SMatthew Ahrens if (err != 0) 20863b2aab18SMatthew Ahrens return (err); 208799653d4eSeschrock 20883b2aab18SMatthew Ahrens hds = ddpa->ddpa_clone; 20891d452cf5Sahrens 2090c1379625SJustin T. Gibbs if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { 20913b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 2092be6fd75aSMatthew Ahrens return (SET_ERROR(EXDEV)); 20933b2aab18SMatthew Ahrens } 20943b2aab18SMatthew Ahrens 20953b2aab18SMatthew Ahrens /* 20963b2aab18SMatthew Ahrens * Compute and check the amount of space to transfer. Since this is 20973b2aab18SMatthew Ahrens * so expensive, don't do the preliminary check. 20983b2aab18SMatthew Ahrens */ 20993b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) { 21003b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 21013b2aab18SMatthew Ahrens return (0); 21023b2aab18SMatthew Ahrens } 21033b2aab18SMatthew Ahrens 21043b2aab18SMatthew Ahrens snap = list_head(&ddpa->shared_snaps); 21053b2aab18SMatthew Ahrens origin_ds = snap->ds; 210699653d4eSeschrock 21073cb34c60Sahrens /* compute origin's new unique space */ 21083b2aab18SMatthew Ahrens snap = list_tail(&ddpa->clone_snaps); 2109c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, 2110c1379625SJustin T. Gibbs origin_ds->ds_object); 2111cde58dbcSMatthew Ahrens dsl_deadlist_space_range(&snap->ds->ds_deadlist, 2112c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, 21133b2aab18SMatthew Ahrens &ddpa->unique, &unused, &unused); 211499653d4eSeschrock 2115745cd3c5Smaybee /* 2116745cd3c5Smaybee * Walk the snapshots that we are moving 2117745cd3c5Smaybee * 211874e7dc98SMatthew Ahrens * Compute space to transfer. Consider the incremental changes 21193b2aab18SMatthew Ahrens * to used by each snapshot: 212074e7dc98SMatthew Ahrens * (my used) = (prev's used) + (blocks born) - (blocks killed) 212174e7dc98SMatthew Ahrens * So each snapshot gave birth to: 212274e7dc98SMatthew Ahrens * (blocks born) = (my used) - (prev's used) + (blocks killed) 2123745cd3c5Smaybee * So a sequence would look like: 212474e7dc98SMatthew Ahrens * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) 2125745cd3c5Smaybee * Which simplifies to: 212674e7dc98SMatthew Ahrens * uN + kN + kN-1 + ... + k1 + k0 2127745cd3c5Smaybee * Note however, if we stop before we reach the ORIGIN we get: 212874e7dc98SMatthew Ahrens * uN + kN + kN-1 + ... + kM - uM-1 2129745cd3c5Smaybee */ 2130a2afb611SJerry Jelinek ss_mv_cnt = 0; 2131c1379625SJustin T. Gibbs ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; 2132c1379625SJustin T. Gibbs ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; 2133c1379625SJustin T. Gibbs ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; 21343b2aab18SMatthew Ahrens for (snap = list_head(&ddpa->shared_snaps); snap; 21353b2aab18SMatthew Ahrens snap = list_next(&ddpa->shared_snaps, snap)) { 213699653d4eSeschrock uint64_t val, dlused, dlcomp, dluncomp; 2137745cd3c5Smaybee dsl_dataset_t *ds = snap->ds; 213899653d4eSeschrock 2139a2afb611SJerry Jelinek ss_mv_cnt++; 2140a2afb611SJerry Jelinek 21413b2aab18SMatthew Ahrens /* 21423b2aab18SMatthew Ahrens * If there are long holds, we won't be able to evict 21433b2aab18SMatthew Ahrens * the objset. 21443b2aab18SMatthew Ahrens */ 21453b2aab18SMatthew Ahrens if (dsl_dataset_long_held(ds)) { 2146be6fd75aSMatthew Ahrens err = SET_ERROR(EBUSY); 21473b2aab18SMatthew Ahrens goto out; 21483b2aab18SMatthew Ahrens } 21493b2aab18SMatthew Ahrens 215099653d4eSeschrock /* Check that the snapshot name does not conflict */ 21513b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 2152745cd3c5Smaybee err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); 2153681d9761SEric Taylor if (err == 0) { 21543b2aab18SMatthew Ahrens (void) strcpy(ddpa->err_ds, snap->ds->ds_snapname); 2155be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 2156681d9761SEric Taylor goto out; 2157681d9761SEric Taylor } 2158745cd3c5Smaybee if (err != ENOENT) 2159681d9761SEric Taylor goto out; 216099653d4eSeschrock 2161745cd3c5Smaybee /* The very first snapshot does not have a deadlist */ 2162c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) 216374e7dc98SMatthew Ahrens continue; 216474e7dc98SMatthew Ahrens 2165cde58dbcSMatthew Ahrens dsl_deadlist_space(&ds->ds_deadlist, 2166cde58dbcSMatthew Ahrens &dlused, &dlcomp, &dluncomp); 21673b2aab18SMatthew Ahrens ddpa->used += dlused; 21683b2aab18SMatthew Ahrens ddpa->comp += dlcomp; 21693b2aab18SMatthew Ahrens ddpa->uncomp += dluncomp; 217074e7dc98SMatthew Ahrens } 2171745cd3c5Smaybee 2172745cd3c5Smaybee /* 2173745cd3c5Smaybee * If we are a clone of a clone then we never reached ORIGIN, 2174745cd3c5Smaybee * so we need to subtract out the clone origin's used space. 2175745cd3c5Smaybee */ 21763b2aab18SMatthew Ahrens if (ddpa->origin_origin) { 2177c1379625SJustin T. Gibbs ddpa->used -= 2178c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; 2179c1379625SJustin T. Gibbs ddpa->comp -= 2180c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; 21813b2aab18SMatthew Ahrens ddpa->uncomp -= 2182c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)-> 2183c1379625SJustin T. Gibbs ds_uncompressed_bytes; 218499653d4eSeschrock } 218599653d4eSeschrock 2186a2afb611SJerry Jelinek /* Check that there is enough space and limit headroom here */ 218774e7dc98SMatthew Ahrens err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, 2188a2afb611SJerry Jelinek 0, ss_mv_cnt, ddpa->used, ddpa->cr); 21893b2aab18SMatthew Ahrens if (err != 0) 21903b2aab18SMatthew Ahrens goto out; 219174e7dc98SMatthew Ahrens 219274e7dc98SMatthew Ahrens /* 219374e7dc98SMatthew Ahrens * Compute the amounts of space that will be used by snapshots 219474e7dc98SMatthew Ahrens * after the promotion (for both origin and clone). For each, 219574e7dc98SMatthew Ahrens * it is the amount of space that will be on all of their 219674e7dc98SMatthew Ahrens * deadlists (that was not born before their new origin). 219774e7dc98SMatthew Ahrens */ 2198c1379625SJustin T. Gibbs if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { 219974e7dc98SMatthew Ahrens uint64_t space; 220074e7dc98SMatthew Ahrens 220174e7dc98SMatthew Ahrens /* 220274e7dc98SMatthew Ahrens * Note, typically this will not be a clone of a clone, 22033f9d6ad7SLin Ling * so dd_origin_txg will be < TXG_INITIAL, so 2204cde58dbcSMatthew Ahrens * these snaplist_space() -> dsl_deadlist_space_range() 220574e7dc98SMatthew Ahrens * calls will be fast because they do not have to 220674e7dc98SMatthew Ahrens * iterate over all bps. 220774e7dc98SMatthew Ahrens */ 22083b2aab18SMatthew Ahrens snap = list_head(&ddpa->origin_snaps); 22093b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->shared_snaps, 22103b2aab18SMatthew Ahrens snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); 22113b2aab18SMatthew Ahrens if (err != 0) 22123b2aab18SMatthew Ahrens goto out; 221374e7dc98SMatthew Ahrens 22143b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->clone_snaps, 22153f9d6ad7SLin Ling snap->ds->ds_dir->dd_origin_txg, &space); 22163b2aab18SMatthew Ahrens if (err != 0) 22173b2aab18SMatthew Ahrens goto out; 22183b2aab18SMatthew Ahrens ddpa->cloneusedsnap += space; 221974e7dc98SMatthew Ahrens } 2220c1379625SJustin T. Gibbs if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & 2221c1379625SJustin T. Gibbs DD_FLAG_USED_BREAKDOWN) { 22223b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->origin_snaps, 2223c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_creation_txg, 2224c1379625SJustin T. Gibbs &ddpa->originusedsnap); 22253b2aab18SMatthew Ahrens if (err != 0) 22263b2aab18SMatthew Ahrens goto out; 2227745cd3c5Smaybee } 22281d452cf5Sahrens 2229681d9761SEric Taylor out: 22303b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 2231681d9761SEric Taylor return (err); 22321d452cf5Sahrens } 223399653d4eSeschrock 22341d452cf5Sahrens static void 22353b2aab18SMatthew Ahrens dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) 22361d452cf5Sahrens { 22373b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t *ddpa = arg; 22383b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 22393b2aab18SMatthew Ahrens dsl_dataset_t *hds; 22403b2aab18SMatthew Ahrens struct promotenode *snap; 22413b2aab18SMatthew Ahrens dsl_dataset_t *origin_ds; 22423b2aab18SMatthew Ahrens dsl_dataset_t *origin_head; 22433b2aab18SMatthew Ahrens dsl_dir_t *dd; 22443cb34c60Sahrens dsl_dir_t *odd = NULL; 2245088f3894Sahrens uint64_t oldnext_obj; 224674e7dc98SMatthew Ahrens int64_t delta; 22471d452cf5Sahrens 22483b2aab18SMatthew Ahrens VERIFY0(promote_hold(ddpa, dp, FTAG)); 22493b2aab18SMatthew Ahrens hds = ddpa->ddpa_clone; 22503b2aab18SMatthew Ahrens 2251c1379625SJustin T. Gibbs ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); 22521d452cf5Sahrens 22533b2aab18SMatthew Ahrens snap = list_head(&ddpa->shared_snaps); 22543b2aab18SMatthew Ahrens origin_ds = snap->ds; 22553b2aab18SMatthew Ahrens dd = hds->ds_dir; 22563b2aab18SMatthew Ahrens 22573b2aab18SMatthew Ahrens snap = list_head(&ddpa->origin_snaps); 225874e7dc98SMatthew Ahrens origin_head = snap->ds; 225974e7dc98SMatthew Ahrens 22600b69c2f0Sahrens /* 22613cb34c60Sahrens * We need to explicitly open odd, since origin_ds's dd will be 22620b69c2f0Sahrens * changing. 22630b69c2f0Sahrens */ 22643b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, 22653cb34c60Sahrens NULL, FTAG, &odd)); 226699653d4eSeschrock 2267745cd3c5Smaybee /* change origin's next snap */ 2268745cd3c5Smaybee dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); 2269c1379625SJustin T. Gibbs oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; 22703b2aab18SMatthew Ahrens snap = list_tail(&ddpa->clone_snaps); 2271c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, 2272c1379625SJustin T. Gibbs origin_ds->ds_object); 2273c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; 2274745cd3c5Smaybee 2275088f3894Sahrens /* change the origin's next clone */ 2276c1379625SJustin T. Gibbs if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { 22773b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(origin_ds, 22783b2aab18SMatthew Ahrens snap->ds->ds_object, tx); 22793b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2280c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_next_clones_obj, 2281088f3894Sahrens oldnext_obj, tx)); 2282088f3894Sahrens } 2283088f3894Sahrens 2284745cd3c5Smaybee /* change origin */ 2285745cd3c5Smaybee dmu_buf_will_dirty(dd->dd_dbuf, tx); 2286c1379625SJustin T. Gibbs ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); 2287c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; 22883f9d6ad7SLin Ling dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; 2289745cd3c5Smaybee dmu_buf_will_dirty(odd->dd_dbuf, tx); 2290c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; 22913f9d6ad7SLin Ling origin_head->ds_dir->dd_origin_txg = 2292c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_creation_txg; 2293745cd3c5Smaybee 2294cde58dbcSMatthew Ahrens /* change dd_clone entries */ 2295cde58dbcSMatthew Ahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 22963b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 2297c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); 22983b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2299c1379625SJustin T. Gibbs dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, 2300cde58dbcSMatthew Ahrens hds->ds_object, tx)); 2301cde58dbcSMatthew Ahrens 23023b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 2303c1379625SJustin T. Gibbs dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, 2304cde58dbcSMatthew Ahrens origin_head->ds_object, tx)); 2305c1379625SJustin T. Gibbs if (dsl_dir_phys(dd)->dd_clones == 0) { 2306c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones = 2307c1379625SJustin T. Gibbs zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, 2308c1379625SJustin T. Gibbs DMU_OT_NONE, 0, tx); 2309cde58dbcSMatthew Ahrens } 23103b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2311c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); 2312cde58dbcSMatthew Ahrens } 2313cde58dbcSMatthew Ahrens 231499653d4eSeschrock /* move snapshots to this dir */ 23153b2aab18SMatthew Ahrens for (snap = list_head(&ddpa->shared_snaps); snap; 23163b2aab18SMatthew Ahrens snap = list_next(&ddpa->shared_snaps, snap)) { 2317745cd3c5Smaybee dsl_dataset_t *ds = snap->ds; 231899653d4eSeschrock 23193b2aab18SMatthew Ahrens /* 23203b2aab18SMatthew Ahrens * Property callbacks are registered to a particular 23213b2aab18SMatthew Ahrens * dsl_dir. Since ours is changing, evict the objset 23223b2aab18SMatthew Ahrens * so that they will be unregistered from the old dsl_dir. 23233b2aab18SMatthew Ahrens */ 2324503ad85cSMatthew Ahrens if (ds->ds_objset) { 2325503ad85cSMatthew Ahrens dmu_objset_evict(ds->ds_objset); 2326503ad85cSMatthew Ahrens ds->ds_objset = NULL; 23273baa08fcSek } 23283b2aab18SMatthew Ahrens 232999653d4eSeschrock /* move snap name entry */ 23303b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 23313b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_snap_remove(origin_head, 2332a2afb611SJerry Jelinek ds->ds_snapname, tx, B_TRUE)); 23333b2aab18SMatthew Ahrens VERIFY0(zap_add(dp->dp_meta_objset, 2334c1379625SJustin T. Gibbs dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, 233599653d4eSeschrock 8, 1, &ds->ds_object, tx)); 2336a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(hds->ds_dir, 1, 2337a2afb611SJerry Jelinek DD_FIELD_SNAPSHOT_COUNT, tx); 2338cde58dbcSMatthew Ahrens 233999653d4eSeschrock /* change containing dsl_dir */ 234099653d4eSeschrock dmu_buf_will_dirty(ds->ds_dbuf, tx); 2341c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); 2342c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; 23433cb34c60Sahrens ASSERT3P(ds->ds_dir, ==, odd); 23443b2aab18SMatthew Ahrens dsl_dir_rele(ds->ds_dir, ds); 23453b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, 234699653d4eSeschrock NULL, ds, &ds->ds_dir)); 234799653d4eSeschrock 2348cde58dbcSMatthew Ahrens /* move any clone references */ 2349c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_clones_obj && 2350cde58dbcSMatthew Ahrens spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 2351cde58dbcSMatthew Ahrens zap_cursor_t zc; 2352cde58dbcSMatthew Ahrens zap_attribute_t za; 2353cde58dbcSMatthew Ahrens 23543b2aab18SMatthew Ahrens for (zap_cursor_init(&zc, dp->dp_meta_objset, 2355c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_next_clones_obj); 23563b2aab18SMatthew Ahrens zap_cursor_retrieve(&zc, &za) == 0; 23573b2aab18SMatthew Ahrens zap_cursor_advance(&zc)) { 23583b2aab18SMatthew Ahrens dsl_dataset_t *cnds; 23593b2aab18SMatthew Ahrens uint64_t o; 2360a9799022Sck 23613b2aab18SMatthew Ahrens if (za.za_first_integer == oldnext_obj) { 23623b2aab18SMatthew Ahrens /* 23633b2aab18SMatthew Ahrens * We've already moved the 23643b2aab18SMatthew Ahrens * origin's reference. 23653b2aab18SMatthew Ahrens */ 23663b2aab18SMatthew Ahrens continue; 23673b2aab18SMatthew Ahrens } 2368a9799022Sck 23693b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 23703b2aab18SMatthew Ahrens za.za_first_integer, FTAG, &cnds)); 2371c1379625SJustin T. Gibbs o = dsl_dir_phys(cnds->ds_dir)-> 2372c1379625SJustin T. Gibbs dd_head_dataset_obj; 2373a9799022Sck 23743b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 2375c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_clones, o, tx)); 23763b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2377c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones, o, tx)); 23783b2aab18SMatthew Ahrens dsl_dataset_rele(cnds, FTAG); 23793b2aab18SMatthew Ahrens } 23803b2aab18SMatthew Ahrens zap_cursor_fini(&zc); 23813b2aab18SMatthew Ahrens } 23829082849eSck 23833b2aab18SMatthew Ahrens ASSERT(!dsl_prop_hascb(ds)); 2384a9799022Sck } 2385a9799022Sck 2386a9799022Sck /* 23873b2aab18SMatthew Ahrens * Change space accounting. 23883b2aab18SMatthew Ahrens * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either 23893b2aab18SMatthew Ahrens * both be valid, or both be 0 (resulting in delta == 0). This 23903b2aab18SMatthew Ahrens * is true for each of {clone,origin} independently. 2391a9799022Sck */ 2392a9799022Sck 23933b2aab18SMatthew Ahrens delta = ddpa->cloneusedsnap - 2394c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; 23953b2aab18SMatthew Ahrens ASSERT3S(delta, >=, 0); 23963b2aab18SMatthew Ahrens ASSERT3U(ddpa->used, >=, delta); 23973b2aab18SMatthew Ahrens dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); 23983b2aab18SMatthew Ahrens dsl_dir_diduse_space(dd, DD_USED_HEAD, 23993b2aab18SMatthew Ahrens ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); 24003b2aab18SMatthew Ahrens 24013b2aab18SMatthew Ahrens delta = ddpa->originusedsnap - 2402c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; 24033b2aab18SMatthew Ahrens ASSERT3S(delta, <=, 0); 24043b2aab18SMatthew Ahrens ASSERT3U(ddpa->used, >=, -delta); 24053b2aab18SMatthew Ahrens dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); 24063b2aab18SMatthew Ahrens dsl_dir_diduse_space(odd, DD_USED_HEAD, 24073b2aab18SMatthew Ahrens -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); 24083b2aab18SMatthew Ahrens 2409c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; 24103b2aab18SMatthew Ahrens 24113b2aab18SMatthew Ahrens /* log history record */ 24123b2aab18SMatthew Ahrens spa_history_log_internal_ds(hds, "promote", tx, ""); 24133b2aab18SMatthew Ahrens 24143b2aab18SMatthew Ahrens dsl_dir_rele(odd, FTAG); 24153b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 2416a9799022Sck } 2417a9799022Sck 24183b2aab18SMatthew Ahrens /* 24193b2aab18SMatthew Ahrens * Make a list of dsl_dataset_t's for the snapshots between first_obj 24203b2aab18SMatthew Ahrens * (exclusive) and last_obj (inclusive). The list will be in reverse 24213b2aab18SMatthew Ahrens * order (last_obj will be the list_head()). If first_obj == 0, do all 24223b2aab18SMatthew Ahrens * snapshots back to this dataset's origin. 24233b2aab18SMatthew Ahrens */ 2424a9799022Sck static int 24253b2aab18SMatthew Ahrens snaplist_make(dsl_pool_t *dp, 24263b2aab18SMatthew Ahrens uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) 2427a9799022Sck { 24283b2aab18SMatthew Ahrens uint64_t obj = last_obj; 2429a9799022Sck 24303b2aab18SMatthew Ahrens list_create(l, sizeof (struct promotenode), 24313b2aab18SMatthew Ahrens offsetof(struct promotenode, link)); 2432a9799022Sck 24333b2aab18SMatthew Ahrens while (obj != first_obj) { 24343b2aab18SMatthew Ahrens dsl_dataset_t *ds; 24353b2aab18SMatthew Ahrens struct promotenode *snap; 24363b2aab18SMatthew Ahrens int err; 243792241e0bSTom Erickson 24383b2aab18SMatthew Ahrens err = dsl_dataset_hold_obj(dp, obj, tag, &ds); 24393b2aab18SMatthew Ahrens ASSERT(err != ENOENT); 24403b2aab18SMatthew Ahrens if (err != 0) 24413b2aab18SMatthew Ahrens return (err); 2442a9799022Sck 24433b2aab18SMatthew Ahrens if (first_obj == 0) 2444c1379625SJustin T. Gibbs first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; 24453b2aab18SMatthew Ahrens 24463b2aab18SMatthew Ahrens snap = kmem_alloc(sizeof (*snap), KM_SLEEP); 24473b2aab18SMatthew Ahrens snap->ds = ds; 24483b2aab18SMatthew Ahrens list_insert_tail(l, snap); 2449c1379625SJustin T. Gibbs obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 24503b2aab18SMatthew Ahrens } 2451a9799022Sck 2452a9799022Sck return (0); 2453a9799022Sck } 2454a9799022Sck 24553b2aab18SMatthew Ahrens static int 24563b2aab18SMatthew Ahrens snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) 2457a9799022Sck { 24583b2aab18SMatthew Ahrens struct promotenode *snap; 2459a9799022Sck 24603b2aab18SMatthew Ahrens *spacep = 0; 24613b2aab18SMatthew Ahrens for (snap = list_head(l); snap; snap = list_next(l, snap)) { 24623b2aab18SMatthew Ahrens uint64_t used, comp, uncomp; 24633b2aab18SMatthew Ahrens dsl_deadlist_space_range(&snap->ds->ds_deadlist, 24643b2aab18SMatthew Ahrens mintxg, UINT64_MAX, &used, &comp, &uncomp); 24653b2aab18SMatthew Ahrens *spacep += used; 246692241e0bSTom Erickson } 24673b2aab18SMatthew Ahrens return (0); 2468a9799022Sck } 2469a9799022Sck 24703b2aab18SMatthew Ahrens static void 24713b2aab18SMatthew Ahrens snaplist_destroy(list_t *l, void *tag) 2472a9799022Sck { 24733b2aab18SMatthew Ahrens struct promotenode *snap; 247492241e0bSTom Erickson 24753b2aab18SMatthew Ahrens if (l == NULL || !list_link_active(&l->list_head)) 24763b2aab18SMatthew Ahrens return; 2477a9799022Sck 24783b2aab18SMatthew Ahrens while ((snap = list_tail(l)) != NULL) { 24793b2aab18SMatthew Ahrens list_remove(l, snap); 24803b2aab18SMatthew Ahrens dsl_dataset_rele(snap->ds, tag); 24813b2aab18SMatthew Ahrens kmem_free(snap, sizeof (*snap)); 24823b2aab18SMatthew Ahrens } 24833b2aab18SMatthew Ahrens list_destroy(l); 2484a9799022Sck } 2485a9799022Sck 2486a9799022Sck static int 24873b2aab18SMatthew Ahrens promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) 2488a9799022Sck { 24893b2aab18SMatthew Ahrens int error; 24903b2aab18SMatthew Ahrens dsl_dir_t *dd; 24913b2aab18SMatthew Ahrens struct promotenode *snap; 2492a9799022Sck 24933b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, 24943b2aab18SMatthew Ahrens &ddpa->ddpa_clone); 24953b2aab18SMatthew Ahrens if (error != 0) 24963b2aab18SMatthew Ahrens return (error); 24973b2aab18SMatthew Ahrens dd = ddpa->ddpa_clone->ds_dir; 2498a9799022Sck 2499*bc9014e6SJustin Gibbs if (ddpa->ddpa_clone->ds_is_snapshot || 25003b2aab18SMatthew Ahrens !dsl_dir_is_clone(dd)) { 25013b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->ddpa_clone, tag); 2502be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 25033b2aab18SMatthew Ahrens } 2504a9799022Sck 2505c1379625SJustin T. Gibbs error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, 25063b2aab18SMatthew Ahrens &ddpa->shared_snaps, tag); 25073b2aab18SMatthew Ahrens if (error != 0) 25083b2aab18SMatthew Ahrens goto out; 2509a9799022Sck 25103b2aab18SMatthew Ahrens error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, 25113b2aab18SMatthew Ahrens &ddpa->clone_snaps, tag); 25123b2aab18SMatthew Ahrens if (error != 0) 25133b2aab18SMatthew Ahrens goto out; 2514a9799022Sck 25153b2aab18SMatthew Ahrens snap = list_head(&ddpa->shared_snaps); 2516c1379625SJustin T. Gibbs ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); 2517c1379625SJustin T. Gibbs error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, 2518c1379625SJustin T. Gibbs dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, 25193b2aab18SMatthew Ahrens &ddpa->origin_snaps, tag); 25203b2aab18SMatthew Ahrens if (error != 0) 25213b2aab18SMatthew Ahrens goto out; 2522379c004dSEric Schrock 2523c1379625SJustin T. Gibbs if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { 25243b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, 2525c1379625SJustin T. Gibbs dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, 25263b2aab18SMatthew Ahrens tag, &ddpa->origin_origin); 25273b2aab18SMatthew Ahrens if (error != 0) 25283b2aab18SMatthew Ahrens goto out; 2529379c004dSEric Schrock } 25303b2aab18SMatthew Ahrens out: 25313b2aab18SMatthew Ahrens if (error != 0) 25323b2aab18SMatthew Ahrens promote_rele(ddpa, tag); 25333b2aab18SMatthew Ahrens return (error); 2534a9799022Sck } 2535a9799022Sck 2536a9799022Sck static void 25373b2aab18SMatthew Ahrens promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) 2538a9799022Sck { 25393b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->shared_snaps, tag); 25403b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->clone_snaps, tag); 25413b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->origin_snaps, tag); 25423b2aab18SMatthew Ahrens if (ddpa->origin_origin != NULL) 25433b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->origin_origin, tag); 25443b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->ddpa_clone, tag); 25453b2aab18SMatthew Ahrens } 254602c8f3f0SMatthew Ahrens 25473b2aab18SMatthew Ahrens /* 25483b2aab18SMatthew Ahrens * Promote a clone. 25493b2aab18SMatthew Ahrens * 25503b2aab18SMatthew Ahrens * If it fails due to a conflicting snapshot name, "conflsnap" will be filled 25513b2aab18SMatthew Ahrens * in with the name. (It must be at least MAXNAMELEN bytes long.) 25523b2aab18SMatthew Ahrens */ 25533b2aab18SMatthew Ahrens int 25543b2aab18SMatthew Ahrens dsl_dataset_promote(const char *name, char *conflsnap) 25553b2aab18SMatthew Ahrens { 25563b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t ddpa = { 0 }; 25573b2aab18SMatthew Ahrens uint64_t numsnaps; 25583b2aab18SMatthew Ahrens int error; 25593b2aab18SMatthew Ahrens objset_t *os; 256092241e0bSTom Erickson 25613b2aab18SMatthew Ahrens /* 25623b2aab18SMatthew Ahrens * We will modify space proportional to the number of 25633b2aab18SMatthew Ahrens * snapshots. Compute numsnaps. 25643b2aab18SMatthew Ahrens */ 25653b2aab18SMatthew Ahrens error = dmu_objset_hold(name, FTAG, &os); 25663b2aab18SMatthew Ahrens if (error != 0) 25673b2aab18SMatthew Ahrens return (error); 25683b2aab18SMatthew Ahrens error = zap_count(dmu_objset_pool(os)->dp_meta_objset, 2569c1379625SJustin T. Gibbs dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, 2570c1379625SJustin T. Gibbs &numsnaps); 25713b2aab18SMatthew Ahrens dmu_objset_rele(os, FTAG); 25723b2aab18SMatthew Ahrens if (error != 0) 25733b2aab18SMatthew Ahrens return (error); 257402c8f3f0SMatthew Ahrens 25753b2aab18SMatthew Ahrens ddpa.ddpa_clonename = name; 25763b2aab18SMatthew Ahrens ddpa.err_ds = conflsnap; 2577a2afb611SJerry Jelinek ddpa.cr = CRED(); 257802c8f3f0SMatthew Ahrens 25793b2aab18SMatthew Ahrens return (dsl_sync_task(name, dsl_dataset_promote_check, 25807d46dc6cSMatthew Ahrens dsl_dataset_promote_sync, &ddpa, 25817d46dc6cSMatthew Ahrens 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED)); 2582a9799022Sck } 2583a9799022Sck 2584a9799022Sck int 25853b2aab18SMatthew Ahrens dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, 258691948b51SKeith M Wesolowski dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) 2587a9799022Sck { 25883b2aab18SMatthew Ahrens int64_t unused_refres_delta; 2589a9799022Sck 25903b2aab18SMatthew Ahrens /* they should both be heads */ 2591*bc9014e6SJustin Gibbs if (clone->ds_is_snapshot || 2592*bc9014e6SJustin Gibbs origin_head->ds_is_snapshot) 2593be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 259492241e0bSTom Erickson 259534f2f8cfSMatthew Ahrens /* if we are not forcing, the branch point should be just before them */ 259634f2f8cfSMatthew Ahrens if (!force && clone->ds_prev != origin_head->ds_prev) 2597be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2598a9799022Sck 25993b2aab18SMatthew Ahrens /* clone should be the clone (unless they are unrelated) */ 26003b2aab18SMatthew Ahrens if (clone->ds_prev != NULL && 26013b2aab18SMatthew Ahrens clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && 260234f2f8cfSMatthew Ahrens origin_head->ds_dir != clone->ds_prev->ds_dir) 2603be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 260492241e0bSTom Erickson 26053b2aab18SMatthew Ahrens /* the clone should be a child of the origin */ 26063b2aab18SMatthew Ahrens if (clone->ds_dir->dd_parent != origin_head->ds_dir) 2607be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2608842727c2SChris Kirby 26093b2aab18SMatthew Ahrens /* origin_head shouldn't be modified unless 'force' */ 261034f2f8cfSMatthew Ahrens if (!force && 261134f2f8cfSMatthew Ahrens dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) 2612be6fd75aSMatthew Ahrens return (SET_ERROR(ETXTBSY)); 2613c99e4bdcSChris Kirby 26143b2aab18SMatthew Ahrens /* origin_head should have no long holds (e.g. is not mounted) */ 261591948b51SKeith M Wesolowski if (dsl_dataset_handoff_check(origin_head, owner, tx)) 2616be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 26173b2aab18SMatthew Ahrens 26183b2aab18SMatthew Ahrens /* check amount of any unconsumed refreservation */ 26193b2aab18SMatthew Ahrens unused_refres_delta = 26203b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2621c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_unique_bytes) - 26223b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2623c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 26243b2aab18SMatthew Ahrens 26253b2aab18SMatthew Ahrens if (unused_refres_delta > 0 && 26263b2aab18SMatthew Ahrens unused_refres_delta > 26273b2aab18SMatthew Ahrens dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) 2628be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 26293b2aab18SMatthew Ahrens 26303b2aab18SMatthew Ahrens /* clone can't be over the head's refquota */ 26313b2aab18SMatthew Ahrens if (origin_head->ds_quota != 0 && 2632c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_referenced_bytes > 2633c1379625SJustin T. Gibbs origin_head->ds_quota) 2634be6fd75aSMatthew Ahrens return (SET_ERROR(EDQUOT)); 2635c99e4bdcSChris Kirby 26363b2aab18SMatthew Ahrens return (0); 2637c99e4bdcSChris Kirby } 2638c99e4bdcSChris Kirby 2639a7f53a56SChris Kirby void 26403b2aab18SMatthew Ahrens dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, 26413b2aab18SMatthew Ahrens dsl_dataset_t *origin_head, dmu_tx_t *tx) 2642a7f53a56SChris Kirby { 26433b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 26443b2aab18SMatthew Ahrens int64_t unused_refres_delta; 2645a7f53a56SChris Kirby 26463b2aab18SMatthew Ahrens ASSERT(clone->ds_reserved == 0); 26473b2aab18SMatthew Ahrens ASSERT(origin_head->ds_quota == 0 || 2648c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota); 264934f2f8cfSMatthew Ahrens ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); 2650842727c2SChris Kirby 26513b2aab18SMatthew Ahrens dmu_buf_will_dirty(clone->ds_dbuf, tx); 26523b2aab18SMatthew Ahrens dmu_buf_will_dirty(origin_head->ds_dbuf, tx); 2653842727c2SChris Kirby 26543b2aab18SMatthew Ahrens if (clone->ds_objset != NULL) { 26553b2aab18SMatthew Ahrens dmu_objset_evict(clone->ds_objset); 26563b2aab18SMatthew Ahrens clone->ds_objset = NULL; 26573b2aab18SMatthew Ahrens } 2658842727c2SChris Kirby 26593b2aab18SMatthew Ahrens if (origin_head->ds_objset != NULL) { 26603b2aab18SMatthew Ahrens dmu_objset_evict(origin_head->ds_objset); 26613b2aab18SMatthew Ahrens origin_head->ds_objset = NULL; 2662842727c2SChris Kirby } 2663842727c2SChris Kirby 26643b2aab18SMatthew Ahrens unused_refres_delta = 26653b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2666c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_unique_bytes) - 26673b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2668c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 26693b2aab18SMatthew Ahrens 26703b2aab18SMatthew Ahrens /* 26713b2aab18SMatthew Ahrens * Reset origin's unique bytes, if it exists. 26723b2aab18SMatthew Ahrens */ 26733b2aab18SMatthew Ahrens if (clone->ds_prev) { 26743b2aab18SMatthew Ahrens dsl_dataset_t *origin = clone->ds_prev; 26753b2aab18SMatthew Ahrens uint64_t comp, uncomp; 26763b2aab18SMatthew Ahrens 26773b2aab18SMatthew Ahrens dmu_buf_will_dirty(origin->ds_dbuf, tx); 26783b2aab18SMatthew Ahrens dsl_deadlist_space_range(&clone->ds_deadlist, 2679c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, 2680c1379625SJustin T. Gibbs &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); 26813b2aab18SMatthew Ahrens } 26823b2aab18SMatthew Ahrens 26833b2aab18SMatthew Ahrens /* swap blkptrs */ 26843b2aab18SMatthew Ahrens { 26853b2aab18SMatthew Ahrens blkptr_t tmp; 2686c1379625SJustin T. Gibbs tmp = dsl_dataset_phys(origin_head)->ds_bp; 2687c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_bp = 2688c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_bp; 2689c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_bp = tmp; 26903b2aab18SMatthew Ahrens } 26913b2aab18SMatthew Ahrens 26923b2aab18SMatthew Ahrens /* set dd_*_bytes */ 26933b2aab18SMatthew Ahrens { 26943b2aab18SMatthew Ahrens int64_t dused, dcomp, duncomp; 26953b2aab18SMatthew Ahrens uint64_t cdl_used, cdl_comp, cdl_uncomp; 26963b2aab18SMatthew Ahrens uint64_t odl_used, odl_comp, odl_uncomp; 26973b2aab18SMatthew Ahrens 2698c1379625SJustin T. Gibbs ASSERT3U(dsl_dir_phys(clone->ds_dir)-> 26993b2aab18SMatthew Ahrens dd_used_breakdown[DD_USED_SNAP], ==, 0); 27003b2aab18SMatthew Ahrens 27013b2aab18SMatthew Ahrens dsl_deadlist_space(&clone->ds_deadlist, 27023b2aab18SMatthew Ahrens &cdl_used, &cdl_comp, &cdl_uncomp); 27033b2aab18SMatthew Ahrens dsl_deadlist_space(&origin_head->ds_deadlist, 27043b2aab18SMatthew Ahrens &odl_used, &odl_comp, &odl_uncomp); 270515508ac0SChris Kirby 2706c1379625SJustin T. Gibbs dused = dsl_dataset_phys(clone)->ds_referenced_bytes + 2707c1379625SJustin T. Gibbs cdl_used - 2708c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_referenced_bytes + 2709c1379625SJustin T. Gibbs odl_used); 2710c1379625SJustin T. Gibbs dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + 2711c1379625SJustin T. Gibbs cdl_comp - 2712c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_compressed_bytes + 2713c1379625SJustin T. Gibbs odl_comp); 2714c1379625SJustin T. Gibbs duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + 27153b2aab18SMatthew Ahrens cdl_uncomp - 2716c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + 2717c1379625SJustin T. Gibbs odl_uncomp); 2718842727c2SChris Kirby 27193b2aab18SMatthew Ahrens dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, 27203b2aab18SMatthew Ahrens dused, dcomp, duncomp, tx); 27213b2aab18SMatthew Ahrens dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, 27223b2aab18SMatthew Ahrens -dused, -dcomp, -duncomp, tx); 2723842727c2SChris Kirby 2724842727c2SChris Kirby /* 27253b2aab18SMatthew Ahrens * The difference in the space used by snapshots is the 27263b2aab18SMatthew Ahrens * difference in snapshot space due to the head's 27273b2aab18SMatthew Ahrens * deadlist (since that's the only thing that's 27283b2aab18SMatthew Ahrens * changing that affects the snapused). 2729842727c2SChris Kirby */ 27303b2aab18SMatthew Ahrens dsl_deadlist_space_range(&clone->ds_deadlist, 27313b2aab18SMatthew Ahrens origin_head->ds_dir->dd_origin_txg, UINT64_MAX, 27323b2aab18SMatthew Ahrens &cdl_used, &cdl_comp, &cdl_uncomp); 27333b2aab18SMatthew Ahrens dsl_deadlist_space_range(&origin_head->ds_deadlist, 27343b2aab18SMatthew Ahrens origin_head->ds_dir->dd_origin_txg, UINT64_MAX, 27353b2aab18SMatthew Ahrens &odl_used, &odl_comp, &odl_uncomp); 27363b2aab18SMatthew Ahrens dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, 27373b2aab18SMatthew Ahrens DD_USED_HEAD, DD_USED_SNAP, tx); 2738842727c2SChris Kirby } 2739842727c2SChris Kirby 27403b2aab18SMatthew Ahrens /* swap ds_*_bytes */ 2741c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, 2742c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_referenced_bytes); 2743c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, 2744c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_compressed_bytes); 2745c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, 2746c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_uncompressed_bytes); 2747c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, 2748c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 2749842727c2SChris Kirby 27503b2aab18SMatthew Ahrens /* apply any parent delta for change in unconsumed refreservation */ 27513b2aab18SMatthew Ahrens dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, 27523b2aab18SMatthew Ahrens unused_refres_delta, 0, 0, tx); 2753ca45db41SChris Kirby 27543b2aab18SMatthew Ahrens /* 27553b2aab18SMatthew Ahrens * Swap deadlists. 27563b2aab18SMatthew Ahrens */ 27573b2aab18SMatthew Ahrens dsl_deadlist_close(&clone->ds_deadlist); 27583b2aab18SMatthew Ahrens dsl_deadlist_close(&origin_head->ds_deadlist); 2759c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, 2760c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_deadlist_obj); 27613b2aab18SMatthew Ahrens dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, 2762c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_deadlist_obj); 27633b2aab18SMatthew Ahrens dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, 2764c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_deadlist_obj); 2765842727c2SChris Kirby 27663b2aab18SMatthew Ahrens dsl_scan_ds_clone_swapped(origin_head, clone, tx); 2767842727c2SChris Kirby 27683b2aab18SMatthew Ahrens spa_history_log_internal_ds(clone, "clone swap", tx, 27693b2aab18SMatthew Ahrens "parent=%s", origin_head->ds_dir->dd_myname); 2770842727c2SChris Kirby } 2771842727c2SChris Kirby 27723b2aab18SMatthew Ahrens /* 27733b2aab18SMatthew Ahrens * Given a pool name and a dataset object number in that pool, 27743b2aab18SMatthew Ahrens * return the name of that dataset. 27753b2aab18SMatthew Ahrens */ 2776a7f53a56SChris Kirby int 27773b2aab18SMatthew Ahrens dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) 2778a7f53a56SChris Kirby { 27793b2aab18SMatthew Ahrens dsl_pool_t *dp; 27803b2aab18SMatthew Ahrens dsl_dataset_t *ds; 2781a7f53a56SChris Kirby int error; 2782a7f53a56SChris Kirby 27833b2aab18SMatthew Ahrens error = dsl_pool_hold(pname, FTAG, &dp); 27843b2aab18SMatthew Ahrens if (error != 0) 27853b2aab18SMatthew Ahrens return (error); 27863b2aab18SMatthew Ahrens 27873b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); 27883b2aab18SMatthew Ahrens if (error == 0) { 27893b2aab18SMatthew Ahrens dsl_dataset_name(ds, buf); 27903b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 27913b2aab18SMatthew Ahrens } 27923b2aab18SMatthew Ahrens dsl_pool_rele(dp, FTAG); 2793a7f53a56SChris Kirby 2794a7f53a56SChris Kirby return (error); 2795a7f53a56SChris Kirby } 2796a7f53a56SChris Kirby 2797842727c2SChris Kirby int 27983b2aab18SMatthew Ahrens dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, 27993b2aab18SMatthew Ahrens uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) 2800842727c2SChris Kirby { 28013b2aab18SMatthew Ahrens int error = 0; 2802842727c2SChris Kirby 28033b2aab18SMatthew Ahrens ASSERT3S(asize, >, 0); 2804842727c2SChris Kirby 28053b2aab18SMatthew Ahrens /* 28063b2aab18SMatthew Ahrens * *ref_rsrv is the portion of asize that will come from any 28073b2aab18SMatthew Ahrens * unconsumed refreservation space. 28083b2aab18SMatthew Ahrens */ 28093b2aab18SMatthew Ahrens *ref_rsrv = 0; 2810842727c2SChris Kirby 28113b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 28123b2aab18SMatthew Ahrens /* 28133b2aab18SMatthew Ahrens * Make a space adjustment for reserved bytes. 28143b2aab18SMatthew Ahrens */ 2815c1379625SJustin T. Gibbs if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { 28163b2aab18SMatthew Ahrens ASSERT3U(*used, >=, 2817c1379625SJustin T. Gibbs ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); 2818c1379625SJustin T. Gibbs *used -= 2819c1379625SJustin T. Gibbs (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); 28203b2aab18SMatthew Ahrens *ref_rsrv = 28213b2aab18SMatthew Ahrens asize - MIN(asize, parent_delta(ds, asize + inflight)); 2822842727c2SChris Kirby } 2823842727c2SChris Kirby 28243b2aab18SMatthew Ahrens if (!check_quota || ds->ds_quota == 0) { 28253b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 28263b2aab18SMatthew Ahrens return (0); 2827842727c2SChris Kirby } 28283b2aab18SMatthew Ahrens /* 28293b2aab18SMatthew Ahrens * If they are requesting more space, and our current estimate 28303b2aab18SMatthew Ahrens * is over quota, they get to try again unless the actual 28313b2aab18SMatthew Ahrens * on-disk is over quota and there are no pending changes (which 28323b2aab18SMatthew Ahrens * may free up space for us). 28333b2aab18SMatthew Ahrens */ 2834c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= 2835c1379625SJustin T. Gibbs ds->ds_quota) { 28363b2aab18SMatthew Ahrens if (inflight > 0 || 2837c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) 2838be6fd75aSMatthew Ahrens error = SET_ERROR(ERESTART); 28393b2aab18SMatthew Ahrens else 2840be6fd75aSMatthew Ahrens error = SET_ERROR(EDQUOT); 2841842727c2SChris Kirby } 28423b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 2843842727c2SChris Kirby 2844842727c2SChris Kirby return (error); 2845842727c2SChris Kirby } 2846842727c2SChris Kirby 28473b2aab18SMatthew Ahrens typedef struct dsl_dataset_set_qr_arg { 28483b2aab18SMatthew Ahrens const char *ddsqra_name; 28493b2aab18SMatthew Ahrens zprop_source_t ddsqra_source; 28503b2aab18SMatthew Ahrens uint64_t ddsqra_value; 28513b2aab18SMatthew Ahrens } dsl_dataset_set_qr_arg_t; 2852842727c2SChris Kirby 28533b2aab18SMatthew Ahrens 28543b2aab18SMatthew Ahrens /* ARGSUSED */ 2855842727c2SChris Kirby static int 28563b2aab18SMatthew Ahrens dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) 2857842727c2SChris Kirby { 28583b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 28593b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 28603b2aab18SMatthew Ahrens dsl_dataset_t *ds; 2861842727c2SChris Kirby int error; 28623b2aab18SMatthew Ahrens uint64_t newval; 2863842727c2SChris Kirby 28643b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) 2865be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 2866842727c2SChris Kirby 28673b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); 28683b2aab18SMatthew Ahrens if (error != 0) 28693b2aab18SMatthew Ahrens return (error); 28703b2aab18SMatthew Ahrens 2871*bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 28723b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2873be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2874842727c2SChris Kirby } 2875842727c2SChris Kirby 28763b2aab18SMatthew Ahrens error = dsl_prop_predict(ds->ds_dir, 28773b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 28783b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); 28793b2aab18SMatthew Ahrens if (error != 0) { 28803b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2881842727c2SChris Kirby return (error); 2882842727c2SChris Kirby } 2883842727c2SChris Kirby 28843b2aab18SMatthew Ahrens if (newval == 0) { 28853b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 28863b2aab18SMatthew Ahrens return (0); 28873b2aab18SMatthew Ahrens } 2888842727c2SChris Kirby 2889c1379625SJustin T. Gibbs if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || 28903b2aab18SMatthew Ahrens newval < ds->ds_reserved) { 28913b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2892be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 28933b2aab18SMatthew Ahrens } 28943b2aab18SMatthew Ahrens 28953b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2896842727c2SChris Kirby return (0); 2897842727c2SChris Kirby } 2898842727c2SChris Kirby 28993b2aab18SMatthew Ahrens static void 29003b2aab18SMatthew Ahrens dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) 2901842727c2SChris Kirby { 29023b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 29033b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 29043b2aab18SMatthew Ahrens dsl_dataset_t *ds; 29053b2aab18SMatthew Ahrens uint64_t newval; 2906842727c2SChris Kirby 29073b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); 2908842727c2SChris Kirby 29093b2aab18SMatthew Ahrens dsl_prop_set_sync_impl(ds, 29103b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 29113b2aab18SMatthew Ahrens ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, 29123b2aab18SMatthew Ahrens &ddsqra->ddsqra_value, tx); 2913842727c2SChris Kirby 29143b2aab18SMatthew Ahrens VERIFY0(dsl_prop_get_int_ds(ds, 29153b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); 2916842727c2SChris Kirby 29173b2aab18SMatthew Ahrens if (ds->ds_quota != newval) { 29183b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 29193b2aab18SMatthew Ahrens ds->ds_quota = newval; 2920842727c2SChris Kirby } 29213b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2922842727c2SChris Kirby } 2923842727c2SChris Kirby 29243b2aab18SMatthew Ahrens int 29253b2aab18SMatthew Ahrens dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, 29263b2aab18SMatthew Ahrens uint64_t refquota) 2927842727c2SChris Kirby { 29283b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t ddsqra; 2929842727c2SChris Kirby 29303b2aab18SMatthew Ahrens ddsqra.ddsqra_name = dsname; 29313b2aab18SMatthew Ahrens ddsqra.ddsqra_source = source; 29323b2aab18SMatthew Ahrens ddsqra.ddsqra_value = refquota; 29333b2aab18SMatthew Ahrens 29343b2aab18SMatthew Ahrens return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, 29357d46dc6cSMatthew Ahrens dsl_dataset_set_refquota_sync, &ddsqra, 0, ZFS_SPACE_CHECK_NONE)); 2936842727c2SChris Kirby } 2937842727c2SChris Kirby 2938842727c2SChris Kirby static int 29393b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) 2940842727c2SChris Kirby { 29413b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 29423b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 2943842727c2SChris Kirby dsl_dataset_t *ds; 2944842727c2SChris Kirby int error; 29453b2aab18SMatthew Ahrens uint64_t newval, unique; 2946d7747cbcSChris Kirby 29473b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) 2948be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 2949842727c2SChris Kirby 29503b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); 29513b2aab18SMatthew Ahrens if (error != 0) 2952842727c2SChris Kirby return (error); 2953842727c2SChris Kirby 2954*bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 29553b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2956be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2957842727c2SChris Kirby } 2958842727c2SChris Kirby 29593b2aab18SMatthew Ahrens error = dsl_prop_predict(ds->ds_dir, 29603b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 29613b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); 29623b2aab18SMatthew Ahrens if (error != 0) { 29633b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2964842727c2SChris Kirby return (error); 2965842727c2SChris Kirby } 2966842727c2SChris Kirby 29673b2aab18SMatthew Ahrens /* 29683b2aab18SMatthew Ahrens * If we are doing the preliminary check in open context, the 29693b2aab18SMatthew Ahrens * space estimates may be inaccurate. 29703b2aab18SMatthew Ahrens */ 29713b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) { 29723b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 29733b2aab18SMatthew Ahrens return (0); 2974842727c2SChris Kirby } 2975842727c2SChris Kirby 29763b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 29773b2aab18SMatthew Ahrens if (!DS_UNIQUE_IS_ACCURATE(ds)) 29783b2aab18SMatthew Ahrens dsl_dataset_recalc_head_uniq(ds); 2979c1379625SJustin T. Gibbs unique = dsl_dataset_phys(ds)->ds_unique_bytes; 29803b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 2981842727c2SChris Kirby 29823b2aab18SMatthew Ahrens if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { 29833b2aab18SMatthew Ahrens uint64_t delta = MAX(unique, newval) - 29843b2aab18SMatthew Ahrens MAX(unique, ds->ds_reserved); 2985842727c2SChris Kirby 29863b2aab18SMatthew Ahrens if (delta > 29873b2aab18SMatthew Ahrens dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || 29883b2aab18SMatthew Ahrens (ds->ds_quota > 0 && newval > ds->ds_quota)) { 29893b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2990be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 29913b2aab18SMatthew Ahrens } 2992842727c2SChris Kirby } 2993842727c2SChris Kirby 29943b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 29953b2aab18SMatthew Ahrens return (0); 2996842727c2SChris Kirby } 2997842727c2SChris Kirby 29983b2aab18SMatthew Ahrens void 29993b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, 30003b2aab18SMatthew Ahrens zprop_source_t source, uint64_t value, dmu_tx_t *tx) 3001ca45db41SChris Kirby { 30023b2aab18SMatthew Ahrens uint64_t newval; 30033b2aab18SMatthew Ahrens uint64_t unique; 30043b2aab18SMatthew Ahrens int64_t delta; 3005ca45db41SChris Kirby 30063b2aab18SMatthew Ahrens dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 30073b2aab18SMatthew Ahrens source, sizeof (value), 1, &value, tx); 3008ca45db41SChris Kirby 30093b2aab18SMatthew Ahrens VERIFY0(dsl_prop_get_int_ds(ds, 30103b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); 3011a7f53a56SChris Kirby 30123b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 30133b2aab18SMatthew Ahrens mutex_enter(&ds->ds_dir->dd_lock); 30143b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 30153b2aab18SMatthew Ahrens ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); 3016c1379625SJustin T. Gibbs unique = dsl_dataset_phys(ds)->ds_unique_bytes; 30173b2aab18SMatthew Ahrens delta = MAX(0, (int64_t)(newval - unique)) - 30183b2aab18SMatthew Ahrens MAX(0, (int64_t)(ds->ds_reserved - unique)); 30193b2aab18SMatthew Ahrens ds->ds_reserved = newval; 30203b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 3021a7f53a56SChris Kirby 30223b2aab18SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); 30233b2aab18SMatthew Ahrens mutex_exit(&ds->ds_dir->dd_lock); 3024ca45db41SChris Kirby } 3025ca45db41SChris Kirby 30263b2aab18SMatthew Ahrens static void 30273b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) 3028842727c2SChris Kirby { 30293b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 30303b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 3031842727c2SChris Kirby dsl_dataset_t *ds; 3032842727c2SChris Kirby 30333b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); 30343b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync_impl(ds, 30353b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); 3036842727c2SChris Kirby dsl_dataset_rele(ds, FTAG); 3037842727c2SChris Kirby } 3038503ad85cSMatthew Ahrens 3039503ad85cSMatthew Ahrens int 30403b2aab18SMatthew Ahrens dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, 30413b2aab18SMatthew Ahrens uint64_t refreservation) 3042503ad85cSMatthew Ahrens { 30433b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t ddsqra; 3044503ad85cSMatthew Ahrens 30453b2aab18SMatthew Ahrens ddsqra.ddsqra_name = dsname; 30463b2aab18SMatthew Ahrens ddsqra.ddsqra_source = source; 30473b2aab18SMatthew Ahrens ddsqra.ddsqra_value = refreservation; 30483b2aab18SMatthew Ahrens 30493b2aab18SMatthew Ahrens return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, 30507d46dc6cSMatthew Ahrens dsl_dataset_set_refreservation_sync, &ddsqra, 30517d46dc6cSMatthew Ahrens 0, ZFS_SPACE_CHECK_NONE)); 3052503ad85cSMatthew Ahrens } 305319b94df9SMatthew Ahrens 305419b94df9SMatthew Ahrens /* 305519b94df9SMatthew Ahrens * Return (in *usedp) the amount of space written in new that is not 305619b94df9SMatthew Ahrens * present in oldsnap. New may be a snapshot or the head. Old must be 305719b94df9SMatthew Ahrens * a snapshot before new, in new's filesystem (or its origin). If not then 305819b94df9SMatthew Ahrens * fail and return EINVAL. 305919b94df9SMatthew Ahrens * 306019b94df9SMatthew Ahrens * The written space is calculated by considering two components: First, we 306119b94df9SMatthew Ahrens * ignore any freed space, and calculate the written as new's used space 306219b94df9SMatthew Ahrens * minus old's used space. Next, we add in the amount of space that was freed 306319b94df9SMatthew Ahrens * between the two snapshots, thus reducing new's used space relative to old's. 306419b94df9SMatthew Ahrens * Specifically, this is the space that was born before old->ds_creation_txg, 306519b94df9SMatthew Ahrens * and freed before new (ie. on new's deadlist or a previous deadlist). 306619b94df9SMatthew Ahrens * 306719b94df9SMatthew Ahrens * space freed [---------------------] 306819b94df9SMatthew Ahrens * snapshots ---O-------O--------O-------O------ 306919b94df9SMatthew Ahrens * oldsnap new 307019b94df9SMatthew Ahrens */ 307119b94df9SMatthew Ahrens int 307219b94df9SMatthew Ahrens dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, 307319b94df9SMatthew Ahrens uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 307419b94df9SMatthew Ahrens { 307519b94df9SMatthew Ahrens int err = 0; 307619b94df9SMatthew Ahrens uint64_t snapobj; 307719b94df9SMatthew Ahrens dsl_pool_t *dp = new->ds_dir->dd_pool; 307819b94df9SMatthew Ahrens 30793b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 30803b2aab18SMatthew Ahrens 308119b94df9SMatthew Ahrens *usedp = 0; 3082c1379625SJustin T. Gibbs *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; 3083c1379625SJustin T. Gibbs *usedp -= dsl_dataset_phys(oldsnap)->ds_referenced_bytes; 308419b94df9SMatthew Ahrens 308519b94df9SMatthew Ahrens *compp = 0; 3086c1379625SJustin T. Gibbs *compp += dsl_dataset_phys(new)->ds_compressed_bytes; 3087c1379625SJustin T. Gibbs *compp -= dsl_dataset_phys(oldsnap)->ds_compressed_bytes; 308819b94df9SMatthew Ahrens 308919b94df9SMatthew Ahrens *uncompp = 0; 3090c1379625SJustin T. Gibbs *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; 3091c1379625SJustin T. Gibbs *uncompp -= dsl_dataset_phys(oldsnap)->ds_uncompressed_bytes; 309219b94df9SMatthew Ahrens 309319b94df9SMatthew Ahrens snapobj = new->ds_object; 309419b94df9SMatthew Ahrens while (snapobj != oldsnap->ds_object) { 309519b94df9SMatthew Ahrens dsl_dataset_t *snap; 309619b94df9SMatthew Ahrens uint64_t used, comp, uncomp; 309719b94df9SMatthew Ahrens 3098ad135b5dSChristopher Siden if (snapobj == new->ds_object) { 3099ad135b5dSChristopher Siden snap = new; 3100ad135b5dSChristopher Siden } else { 3101ad135b5dSChristopher Siden err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); 3102ad135b5dSChristopher Siden if (err != 0) 3103ad135b5dSChristopher Siden break; 3104ad135b5dSChristopher Siden } 310519b94df9SMatthew Ahrens 3106c1379625SJustin T. Gibbs if (dsl_dataset_phys(snap)->ds_prev_snap_txg == 3107c1379625SJustin T. Gibbs dsl_dataset_phys(oldsnap)->ds_creation_txg) { 310819b94df9SMatthew Ahrens /* 310919b94df9SMatthew Ahrens * The blocks in the deadlist can not be born after 311019b94df9SMatthew Ahrens * ds_prev_snap_txg, so get the whole deadlist space, 311119b94df9SMatthew Ahrens * which is more efficient (especially for old-format 311219b94df9SMatthew Ahrens * deadlists). Unfortunately the deadlist code 311319b94df9SMatthew Ahrens * doesn't have enough information to make this 311419b94df9SMatthew Ahrens * optimization itself. 311519b94df9SMatthew Ahrens */ 311619b94df9SMatthew Ahrens dsl_deadlist_space(&snap->ds_deadlist, 311719b94df9SMatthew Ahrens &used, &comp, &uncomp); 311819b94df9SMatthew Ahrens } else { 311919b94df9SMatthew Ahrens dsl_deadlist_space_range(&snap->ds_deadlist, 3120c1379625SJustin T. Gibbs 0, dsl_dataset_phys(oldsnap)->ds_creation_txg, 312119b94df9SMatthew Ahrens &used, &comp, &uncomp); 312219b94df9SMatthew Ahrens } 312319b94df9SMatthew Ahrens *usedp += used; 312419b94df9SMatthew Ahrens *compp += comp; 312519b94df9SMatthew Ahrens *uncompp += uncomp; 312619b94df9SMatthew Ahrens 312719b94df9SMatthew Ahrens /* 312819b94df9SMatthew Ahrens * If we get to the beginning of the chain of snapshots 312919b94df9SMatthew Ahrens * (ds_prev_snap_obj == 0) before oldsnap, then oldsnap 313019b94df9SMatthew Ahrens * was not a snapshot of/before new. 313119b94df9SMatthew Ahrens */ 3132c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 3133ad135b5dSChristopher Siden if (snap != new) 3134ad135b5dSChristopher Siden dsl_dataset_rele(snap, FTAG); 313519b94df9SMatthew Ahrens if (snapobj == 0) { 3136be6fd75aSMatthew Ahrens err = SET_ERROR(EINVAL); 313719b94df9SMatthew Ahrens break; 313819b94df9SMatthew Ahrens } 313919b94df9SMatthew Ahrens 314019b94df9SMatthew Ahrens } 314119b94df9SMatthew Ahrens return (err); 314219b94df9SMatthew Ahrens } 314319b94df9SMatthew Ahrens 314419b94df9SMatthew Ahrens /* 314519b94df9SMatthew Ahrens * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, 314619b94df9SMatthew Ahrens * lastsnap, and all snapshots in between are deleted. 314719b94df9SMatthew Ahrens * 314819b94df9SMatthew Ahrens * blocks that would be freed [---------------------------] 314919b94df9SMatthew Ahrens * snapshots ---O-------O--------O-------O--------O 315019b94df9SMatthew Ahrens * firstsnap lastsnap 315119b94df9SMatthew Ahrens * 315219b94df9SMatthew Ahrens * This is the set of blocks that were born after the snap before firstsnap, 315319b94df9SMatthew Ahrens * (birth > firstsnap->prev_snap_txg) and died before the snap after the 315419b94df9SMatthew Ahrens * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). 315519b94df9SMatthew Ahrens * We calculate this by iterating over the relevant deadlists (from the snap 315619b94df9SMatthew Ahrens * after lastsnap, backward to the snap after firstsnap), summing up the 315719b94df9SMatthew Ahrens * space on the deadlist that was born after the snap before firstsnap. 315819b94df9SMatthew Ahrens */ 315919b94df9SMatthew Ahrens int 316019b94df9SMatthew Ahrens dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, 316119b94df9SMatthew Ahrens dsl_dataset_t *lastsnap, 316219b94df9SMatthew Ahrens uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 316319b94df9SMatthew Ahrens { 316419b94df9SMatthew Ahrens int err = 0; 316519b94df9SMatthew Ahrens uint64_t snapobj; 316619b94df9SMatthew Ahrens dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; 316719b94df9SMatthew Ahrens 3168*bc9014e6SJustin Gibbs ASSERT(firstsnap->ds_is_snapshot); 3169*bc9014e6SJustin Gibbs ASSERT(lastsnap->ds_is_snapshot); 317019b94df9SMatthew Ahrens 317119b94df9SMatthew Ahrens /* 317219b94df9SMatthew Ahrens * Check that the snapshots are in the same dsl_dir, and firstsnap 317319b94df9SMatthew Ahrens * is before lastsnap. 317419b94df9SMatthew Ahrens */ 317519b94df9SMatthew Ahrens if (firstsnap->ds_dir != lastsnap->ds_dir || 3176c1379625SJustin T. Gibbs dsl_dataset_phys(firstsnap)->ds_creation_txg > 3177c1379625SJustin T. Gibbs dsl_dataset_phys(lastsnap)->ds_creation_txg) 3178be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 317919b94df9SMatthew Ahrens 318019b94df9SMatthew Ahrens *usedp = *compp = *uncompp = 0; 318119b94df9SMatthew Ahrens 3182c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; 318319b94df9SMatthew Ahrens while (snapobj != firstsnap->ds_object) { 318419b94df9SMatthew Ahrens dsl_dataset_t *ds; 318519b94df9SMatthew Ahrens uint64_t used, comp, uncomp; 318619b94df9SMatthew Ahrens 318719b94df9SMatthew Ahrens err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); 318819b94df9SMatthew Ahrens if (err != 0) 318919b94df9SMatthew Ahrens break; 319019b94df9SMatthew Ahrens 319119b94df9SMatthew Ahrens dsl_deadlist_space_range(&ds->ds_deadlist, 3192c1379625SJustin T. Gibbs dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, 319319b94df9SMatthew Ahrens &used, &comp, &uncomp); 319419b94df9SMatthew Ahrens *usedp += used; 319519b94df9SMatthew Ahrens *compp += comp; 319619b94df9SMatthew Ahrens *uncompp += uncomp; 319719b94df9SMatthew Ahrens 3198c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 319919b94df9SMatthew Ahrens ASSERT3U(snapobj, !=, 0); 320019b94df9SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 320119b94df9SMatthew Ahrens } 320219b94df9SMatthew Ahrens return (err); 320319b94df9SMatthew Ahrens } 32043b2aab18SMatthew Ahrens 3205b5152584SMatthew Ahrens static int 3206b5152584SMatthew Ahrens dsl_dataset_activate_large_blocks_check(void *arg, dmu_tx_t *tx) 3207b5152584SMatthew Ahrens { 3208b5152584SMatthew Ahrens const char *dsname = arg; 3209b5152584SMatthew Ahrens dsl_dataset_t *ds; 3210b5152584SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 3211b5152584SMatthew Ahrens int error = 0; 3212b5152584SMatthew Ahrens 3213b5152584SMatthew Ahrens if (!spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) 3214b5152584SMatthew Ahrens return (SET_ERROR(ENOTSUP)); 3215b5152584SMatthew Ahrens 3216b5152584SMatthew Ahrens ASSERT(spa_feature_is_enabled(dp->dp_spa, 3217b5152584SMatthew Ahrens SPA_FEATURE_EXTENSIBLE_DATASET)); 3218b5152584SMatthew Ahrens 3219b5152584SMatthew Ahrens error = dsl_dataset_hold(dp, dsname, FTAG, &ds); 3220b5152584SMatthew Ahrens if (error != 0) 3221b5152584SMatthew Ahrens return (error); 3222b5152584SMatthew Ahrens 3223b5152584SMatthew Ahrens if (ds->ds_large_blocks) 3224b5152584SMatthew Ahrens error = EALREADY; 3225b5152584SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3226b5152584SMatthew Ahrens 3227b5152584SMatthew Ahrens return (error); 3228b5152584SMatthew Ahrens } 3229b5152584SMatthew Ahrens 3230b5152584SMatthew Ahrens void 3231b5152584SMatthew Ahrens dsl_dataset_activate_large_blocks_sync_impl(uint64_t dsobj, dmu_tx_t *tx) 3232b5152584SMatthew Ahrens { 3233b5152584SMatthew Ahrens spa_t *spa = dmu_tx_pool(tx)->dp_spa; 3234b5152584SMatthew Ahrens objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; 3235b5152584SMatthew Ahrens uint64_t zero = 0; 3236b5152584SMatthew Ahrens 3237b5152584SMatthew Ahrens spa_feature_incr(spa, SPA_FEATURE_LARGE_BLOCKS, tx); 3238b5152584SMatthew Ahrens dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); 3239b5152584SMatthew Ahrens 3240b5152584SMatthew Ahrens VERIFY0(zap_add(mos, dsobj, DS_FIELD_LARGE_BLOCKS, 3241b5152584SMatthew Ahrens sizeof (zero), 1, &zero, tx)); 3242b5152584SMatthew Ahrens } 3243b5152584SMatthew Ahrens 3244b5152584SMatthew Ahrens static void 3245b5152584SMatthew Ahrens dsl_dataset_activate_large_blocks_sync(void *arg, dmu_tx_t *tx) 3246b5152584SMatthew Ahrens { 3247b5152584SMatthew Ahrens const char *dsname = arg; 3248b5152584SMatthew Ahrens dsl_dataset_t *ds; 3249b5152584SMatthew Ahrens 3250b5152584SMatthew Ahrens VERIFY0(dsl_dataset_hold(dmu_tx_pool(tx), dsname, FTAG, &ds)); 3251b5152584SMatthew Ahrens 3252b5152584SMatthew Ahrens dsl_dataset_activate_large_blocks_sync_impl(ds->ds_object, tx); 3253b5152584SMatthew Ahrens ASSERT(!ds->ds_large_blocks); 3254b5152584SMatthew Ahrens ds->ds_large_blocks = B_TRUE; 3255b5152584SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3256b5152584SMatthew Ahrens } 3257b5152584SMatthew Ahrens 3258b5152584SMatthew Ahrens int 3259b5152584SMatthew Ahrens dsl_dataset_activate_large_blocks(const char *dsname) 3260b5152584SMatthew Ahrens { 3261b5152584SMatthew Ahrens int error; 3262b5152584SMatthew Ahrens 3263b5152584SMatthew Ahrens error = dsl_sync_task(dsname, 3264b5152584SMatthew Ahrens dsl_dataset_activate_large_blocks_check, 3265b5152584SMatthew Ahrens dsl_dataset_activate_large_blocks_sync, (void *)dsname, 3266b5152584SMatthew Ahrens 1, ZFS_SPACE_CHECK_RESERVED); 3267b5152584SMatthew Ahrens 3268b5152584SMatthew Ahrens /* 3269b5152584SMatthew Ahrens * EALREADY indicates that this dataset already supports large blocks. 3270b5152584SMatthew Ahrens */ 3271b5152584SMatthew Ahrens if (error == EALREADY) 3272b5152584SMatthew Ahrens error = 0; 3273b5152584SMatthew Ahrens return (error); 3274b5152584SMatthew Ahrens } 3275b5152584SMatthew Ahrens 32763b2aab18SMatthew Ahrens /* 32773b2aab18SMatthew Ahrens * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. 32783b2aab18SMatthew Ahrens * For example, they could both be snapshots of the same filesystem, and 32793b2aab18SMatthew Ahrens * 'earlier' is before 'later'. Or 'earlier' could be the origin of 32803b2aab18SMatthew Ahrens * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's 32813b2aab18SMatthew Ahrens * filesystem. Or 'earlier' could be the origin's origin. 328278f17100SMatthew Ahrens * 328378f17100SMatthew Ahrens * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. 32843b2aab18SMatthew Ahrens */ 32853b2aab18SMatthew Ahrens boolean_t 328678f17100SMatthew Ahrens dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, 328778f17100SMatthew Ahrens uint64_t earlier_txg) 32883b2aab18SMatthew Ahrens { 32893b2aab18SMatthew Ahrens dsl_pool_t *dp = later->ds_dir->dd_pool; 32903b2aab18SMatthew Ahrens int error; 32913b2aab18SMatthew Ahrens boolean_t ret; 32923b2aab18SMatthew Ahrens 32933b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 3294*bc9014e6SJustin Gibbs ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); 329578f17100SMatthew Ahrens 329678f17100SMatthew Ahrens if (earlier_txg == 0) 3297c1379625SJustin T. Gibbs earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; 32983b2aab18SMatthew Ahrens 3299*bc9014e6SJustin Gibbs if (later->ds_is_snapshot && 3300c1379625SJustin T. Gibbs earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) 33013b2aab18SMatthew Ahrens return (B_FALSE); 33023b2aab18SMatthew Ahrens 33033b2aab18SMatthew Ahrens if (later->ds_dir == earlier->ds_dir) 33043b2aab18SMatthew Ahrens return (B_TRUE); 33053b2aab18SMatthew Ahrens if (!dsl_dir_is_clone(later->ds_dir)) 33063b2aab18SMatthew Ahrens return (B_FALSE); 33073b2aab18SMatthew Ahrens 3308c1379625SJustin T. Gibbs if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == earlier->ds_object) 33093b2aab18SMatthew Ahrens return (B_TRUE); 33103b2aab18SMatthew Ahrens dsl_dataset_t *origin; 33113b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, 3312c1379625SJustin T. Gibbs dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); 33133b2aab18SMatthew Ahrens if (error != 0) 33143b2aab18SMatthew Ahrens return (B_FALSE); 331578f17100SMatthew Ahrens ret = dsl_dataset_is_before(origin, earlier, earlier_txg); 33163b2aab18SMatthew Ahrens dsl_dataset_rele(origin, FTAG); 33173b2aab18SMatthew Ahrens return (ret); 33183b2aab18SMatthew Ahrens } 33192acef22dSMatthew Ahrens 33202acef22dSMatthew Ahrens 33212acef22dSMatthew Ahrens void 33222acef22dSMatthew Ahrens dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) 33232acef22dSMatthew Ahrens { 33242acef22dSMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 33252acef22dSMatthew Ahrens dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); 33262acef22dSMatthew Ahrens } 3327