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. 23ca0cc391SMatthew Ahrens * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 24a2afb611SJerry Jelinek * Copyright (c) 2014, Joyent, Inc. All rights reserved. 2503d1795fSAlexander Stetsenko * Copyright (c) 2014 RackTop Systems. 26bc9014e6SJustin 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> 53*45818ee1SMatthew Ahrens #include <sys/dmu_send.h> 54*45818ee1SMatthew Ahrens #include <sys/zio_checksum.h> 55e1930233Sbonwick 56b5152584SMatthew Ahrens /* 57b5152584SMatthew Ahrens * The SPA supports block sizes up to 16MB. However, very large blocks 58b5152584SMatthew Ahrens * can have an impact on i/o latency (e.g. tying up a spinning disk for 59b5152584SMatthew Ahrens * ~300ms), and also potentially on the memory allocator. Therefore, 60b5152584SMatthew Ahrens * we do not allow the recordsize to be set larger than zfs_max_recordsize 61b5152584SMatthew Ahrens * (default 1MB). Larger blocks can be created by changing this tunable, 62b5152584SMatthew Ahrens * and pools with larger blocks can always be imported and used, regardless 63b5152584SMatthew Ahrens * of this setting. 64b5152584SMatthew Ahrens */ 65b5152584SMatthew Ahrens int zfs_max_recordsize = 1 * 1024 * 1024; 66b5152584SMatthew Ahrens 67cde58dbcSMatthew Ahrens #define SWITCH64(x, y) \ 68cde58dbcSMatthew Ahrens { \ 69cde58dbcSMatthew Ahrens uint64_t __tmp = (x); \ 70cde58dbcSMatthew Ahrens (x) = (y); \ 71cde58dbcSMatthew Ahrens (y) = __tmp; \ 72cde58dbcSMatthew Ahrens } 73cde58dbcSMatthew Ahrens 7455434c77Sek #define DS_REF_MAX (1ULL << 62) 75fa9e4066Sahrens 76c1379625SJustin T. Gibbs extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); 77c1379625SJustin T. Gibbs 78a9799022Sck /* 79a9799022Sck * Figure out how much of this delta should be propogated to the dsl_dir 80a9799022Sck * layer. If there's a refreservation, that space has already been 81a9799022Sck * partially accounted for in our ancestors. 82a9799022Sck */ 83a9799022Sck static int64_t 84a9799022Sck parent_delta(dsl_dataset_t *ds, int64_t delta) 85a9799022Sck { 86c1379625SJustin T. Gibbs dsl_dataset_phys_t *ds_phys; 87a9799022Sck uint64_t old_bytes, new_bytes; 88a9799022Sck 89a9799022Sck if (ds->ds_reserved == 0) 90a9799022Sck return (delta); 91a9799022Sck 92c1379625SJustin T. Gibbs ds_phys = dsl_dataset_phys(ds); 93c1379625SJustin T. Gibbs old_bytes = MAX(ds_phys->ds_unique_bytes, ds->ds_reserved); 94c1379625SJustin T. Gibbs new_bytes = MAX(ds_phys->ds_unique_bytes + delta, ds->ds_reserved); 95a9799022Sck 96a9799022Sck ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); 97a9799022Sck return (new_bytes - old_bytes); 98a9799022Sck } 99fa9e4066Sahrens 100fa9e4066Sahrens void 101b24ab676SJeff Bonwick dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) 102fa9e4066Sahrens { 103b24ab676SJeff Bonwick int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); 104fa9e4066Sahrens int compressed = BP_GET_PSIZE(bp); 105fa9e4066Sahrens int uncompressed = BP_GET_UCSIZE(bp); 106a9799022Sck int64_t delta; 107fa9e4066Sahrens 1083f9d6ad7SLin Ling dprintf_bp(bp, "ds=%p", ds); 109fa9e4066Sahrens 110fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 111fa9e4066Sahrens /* It could have been compressed away to nothing */ 112fa9e4066Sahrens if (BP_IS_HOLE(bp)) 113fa9e4066Sahrens return; 114fa9e4066Sahrens ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); 115ad135b5dSChristopher Siden ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp))); 116fa9e4066Sahrens if (ds == NULL) { 117ce636f8bSMatthew Ahrens dsl_pool_mos_diduse_space(tx->tx_pool, 118ce636f8bSMatthew Ahrens used, compressed, uncompressed); 119fa9e4066Sahrens return; 120fa9e4066Sahrens } 1213f9d6ad7SLin Ling 122b62969f8SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 123fa9e4066Sahrens mutex_enter(&ds->ds_lock); 124a9799022Sck delta = parent_delta(ds, used); 125c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes += used; 126c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; 127c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; 128c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes += used; 129*45818ee1SMatthew Ahrens 130ca0cc391SMatthew Ahrens if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) { 131ca0cc391SMatthew Ahrens ds->ds_feature_activation_needed[SPA_FEATURE_LARGE_BLOCKS] = 132ca0cc391SMatthew Ahrens B_TRUE; 133ca0cc391SMatthew Ahrens } 134*45818ee1SMatthew Ahrens 135*45818ee1SMatthew Ahrens spa_feature_t f = zio_checksum_to_feature(BP_GET_CHECKSUM(bp)); 136*45818ee1SMatthew Ahrens if (f != SPA_FEATURE_NONE) 137*45818ee1SMatthew Ahrens ds->ds_feature_activation_needed[f] = B_TRUE; 138*45818ee1SMatthew Ahrens 139fa9e4066Sahrens mutex_exit(&ds->ds_lock); 14074e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, 14174e7dc98SMatthew Ahrens compressed, uncompressed, tx); 14274e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, used - delta, 14374e7dc98SMatthew Ahrens DD_USED_REFRSRV, DD_USED_HEAD, tx); 144fa9e4066Sahrens } 145fa9e4066Sahrens 146cdb0ab79Smaybee int 147b24ab676SJeff Bonwick dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, 148b24ab676SJeff Bonwick boolean_t async) 149fa9e4066Sahrens { 15043466aaeSMax Grossman int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); 15143466aaeSMax Grossman int compressed = BP_GET_PSIZE(bp); 15243466aaeSMax Grossman int uncompressed = BP_GET_UCSIZE(bp); 15343466aaeSMax Grossman 154fa9e4066Sahrens if (BP_IS_HOLE(bp)) 155cdb0ab79Smaybee return (0); 156fa9e4066Sahrens 157b24ab676SJeff Bonwick ASSERT(dmu_tx_is_syncing(tx)); 158b24ab676SJeff Bonwick ASSERT(bp->blk_birth <= tx->tx_txg); 159b24ab676SJeff Bonwick 160fa9e4066Sahrens if (ds == NULL) { 161b24ab676SJeff Bonwick dsl_free(tx->tx_pool, tx->tx_txg, bp); 162ce636f8bSMatthew Ahrens dsl_pool_mos_diduse_space(tx->tx_pool, 163ce636f8bSMatthew Ahrens -used, -compressed, -uncompressed); 164cdb0ab79Smaybee return (used); 165fa9e4066Sahrens } 166fa9e4066Sahrens ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); 167fa9e4066Sahrens 168bc9014e6SJustin Gibbs ASSERT(!ds->ds_is_snapshot); 169fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 170fa9e4066Sahrens 171c1379625SJustin T. Gibbs if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { 172a9799022Sck int64_t delta; 173c717a561Smaybee 1743f9d6ad7SLin Ling dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); 175b24ab676SJeff Bonwick dsl_free(tx->tx_pool, tx->tx_txg, bp); 176fa9e4066Sahrens 177fa9e4066Sahrens mutex_enter(&ds->ds_lock); 178c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || 179a9799022Sck !DS_UNIQUE_IS_ACCURATE(ds)); 180a9799022Sck delta = parent_delta(ds, -used); 181c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes -= used; 182fa9e4066Sahrens mutex_exit(&ds->ds_lock); 18374e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, 184a9799022Sck delta, -compressed, -uncompressed, tx); 18574e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, -used - delta, 18674e7dc98SMatthew Ahrens DD_USED_REFRSRV, DD_USED_HEAD, tx); 187fa9e4066Sahrens } else { 188fa9e4066Sahrens dprintf_bp(bp, "putting on dead list: %s", ""); 189b24ab676SJeff Bonwick if (async) { 190b24ab676SJeff Bonwick /* 191b24ab676SJeff Bonwick * We are here as part of zio's write done callback, 192b24ab676SJeff Bonwick * which means we're a zio interrupt thread. We can't 193cde58dbcSMatthew Ahrens * call dsl_deadlist_insert() now because it may block 194b24ab676SJeff Bonwick * waiting for I/O. Instead, put bp on the deferred 195b24ab676SJeff Bonwick * queue and let dsl_pool_sync() finish the job. 196b24ab676SJeff Bonwick */ 197cde58dbcSMatthew Ahrens bplist_append(&ds->ds_pending_deadlist, bp); 198b24ab676SJeff Bonwick } else { 199cde58dbcSMatthew Ahrens dsl_deadlist_insert(&ds->ds_deadlist, bp, tx); 200b24ab676SJeff Bonwick } 201a4611edeSahrens ASSERT3U(ds->ds_prev->ds_object, ==, 202c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj); 203c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); 204fa9e4066Sahrens /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ 205c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 206a4611edeSahrens ds->ds_object && bp->blk_birth > 207c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { 208a4611edeSahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 209a4611edeSahrens mutex_enter(&ds->ds_prev->ds_lock); 210c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; 211a4611edeSahrens mutex_exit(&ds->ds_prev->ds_lock); 212fa9e4066Sahrens } 2133f9d6ad7SLin Ling if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { 21474e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, used, 21574e7dc98SMatthew Ahrens DD_USED_HEAD, DD_USED_SNAP, tx); 21674e7dc98SMatthew Ahrens } 217fa9e4066Sahrens } 218fa9e4066Sahrens mutex_enter(&ds->ds_lock); 219c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); 220c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes -= used; 221c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); 222c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; 223c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); 224c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; 225fa9e4066Sahrens mutex_exit(&ds->ds_lock); 226cdb0ab79Smaybee 227cdb0ab79Smaybee return (used); 228fa9e4066Sahrens } 229fa9e4066Sahrens 230ea8dc4b6Seschrock uint64_t 231ea8dc4b6Seschrock dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) 232fa9e4066Sahrens { 233a2eea2e1Sahrens uint64_t trysnap = 0; 234a2eea2e1Sahrens 235fa9e4066Sahrens if (ds == NULL) 236ea8dc4b6Seschrock return (0); 237fa9e4066Sahrens /* 238fa9e4066Sahrens * The snapshot creation could fail, but that would cause an 239fa9e4066Sahrens * incorrect FALSE return, which would only result in an 240fa9e4066Sahrens * overestimation of the amount of space that an operation would 241fa9e4066Sahrens * consume, which is OK. 242fa9e4066Sahrens * 243fa9e4066Sahrens * There's also a small window where we could miss a pending 244fa9e4066Sahrens * snapshot, because we could set the sync task in the quiescing 245fa9e4066Sahrens * phase. So this should only be used as a guess. 246fa9e4066Sahrens */ 247a2eea2e1Sahrens if (ds->ds_trysnap_txg > 248a2eea2e1Sahrens spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) 249a2eea2e1Sahrens trysnap = ds->ds_trysnap_txg; 250c1379625SJustin T. Gibbs return (MAX(dsl_dataset_phys(ds)->ds_prev_snap_txg, trysnap)); 251ea8dc4b6Seschrock } 252ea8dc4b6Seschrock 2533d692628SSanjeev Bagewadi boolean_t 254c7cd2421SGeorge Wilson dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp, 255c7cd2421SGeorge Wilson uint64_t blk_birth) 256ea8dc4b6Seschrock { 25743466aaeSMax Grossman if (blk_birth <= dsl_dataset_prev_snap_txg(ds) || 25843466aaeSMax Grossman (bp != NULL && BP_IS_HOLE(bp))) 259c7cd2421SGeorge Wilson return (B_FALSE); 260c7cd2421SGeorge Wilson 261837b568bSGeorge Wilson ddt_prefetch(dsl_dataset_get_spa(ds), bp); 262c7cd2421SGeorge Wilson 263c7cd2421SGeorge Wilson return (B_TRUE); 264fa9e4066Sahrens } 265fa9e4066Sahrens 266fa9e4066Sahrens static void 267bc9014e6SJustin Gibbs dsl_dataset_evict(void *dbu) 268fa9e4066Sahrens { 269bc9014e6SJustin Gibbs dsl_dataset_t *ds = dbu; 270fa9e4066Sahrens 2713b2aab18SMatthew Ahrens ASSERT(ds->ds_owner == NULL); 272fa9e4066Sahrens 273bc9014e6SJustin Gibbs ds->ds_dbuf = NULL; 274bc9014e6SJustin Gibbs 27591ebeef5Sahrens unique_remove(ds->ds_fsid_guid); 276fa9e4066Sahrens 277503ad85cSMatthew Ahrens if (ds->ds_objset != NULL) 278503ad85cSMatthew Ahrens dmu_objset_evict(ds->ds_objset); 279fa9e4066Sahrens 280fa9e4066Sahrens if (ds->ds_prev) { 2813b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 282fa9e4066Sahrens ds->ds_prev = NULL; 283fa9e4066Sahrens } 284fa9e4066Sahrens 285cde58dbcSMatthew Ahrens bplist_destroy(&ds->ds_pending_deadlist); 286bc9014e6SJustin Gibbs if (ds->ds_deadlist.dl_os != NULL) 287cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 288745cd3c5Smaybee if (ds->ds_dir) 289bc9014e6SJustin Gibbs dsl_dir_async_rele(ds->ds_dir, ds); 290fa9e4066Sahrens 29191ebeef5Sahrens ASSERT(!list_link_active(&ds->ds_synced_link)); 292fa9e4066Sahrens 2935ad82045Snd mutex_destroy(&ds->ds_lock); 29491ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 295d2b3cbbdSJorgen Lundman mutex_destroy(&ds->ds_sendstream_lock); 2963b2aab18SMatthew Ahrens refcount_destroy(&ds->ds_longholds); 2975ad82045Snd 298fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 299fa9e4066Sahrens } 300fa9e4066Sahrens 3013b2aab18SMatthew Ahrens int 302fa9e4066Sahrens dsl_dataset_get_snapname(dsl_dataset_t *ds) 303fa9e4066Sahrens { 304fa9e4066Sahrens dsl_dataset_phys_t *headphys; 305fa9e4066Sahrens int err; 306fa9e4066Sahrens dmu_buf_t *headdbuf; 307fa9e4066Sahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 308fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 309fa9e4066Sahrens 310fa9e4066Sahrens if (ds->ds_snapname[0]) 311ea8dc4b6Seschrock return (0); 312c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) 313ea8dc4b6Seschrock return (0); 314fa9e4066Sahrens 315c1379625SJustin T. Gibbs err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, 316ea8dc4b6Seschrock FTAG, &headdbuf); 3173b2aab18SMatthew Ahrens if (err != 0) 318ea8dc4b6Seschrock return (err); 319fa9e4066Sahrens headphys = headdbuf->db_data; 320fa9e4066Sahrens err = zap_value_search(dp->dp_meta_objset, 321e7437265Sahrens headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); 322ea8dc4b6Seschrock dmu_buf_rele(headdbuf, FTAG); 323ea8dc4b6Seschrock return (err); 324fa9e4066Sahrens } 325fa9e4066Sahrens 3263b2aab18SMatthew Ahrens int 327745cd3c5Smaybee dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) 328ab04eb8eStimh { 329745cd3c5Smaybee objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 330c1379625SJustin T. Gibbs uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 331ab04eb8eStimh matchtype_t mt; 332ab04eb8eStimh int err; 333ab04eb8eStimh 334c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) 335ab04eb8eStimh mt = MT_FIRST; 336ab04eb8eStimh else 337ab04eb8eStimh mt = MT_EXACT; 338ab04eb8eStimh 339745cd3c5Smaybee err = zap_lookup_norm(mos, snapobj, name, 8, 1, 340ab04eb8eStimh value, mt, NULL, 0, NULL); 341ab04eb8eStimh if (err == ENOTSUP && mt == MT_FIRST) 342745cd3c5Smaybee err = zap_lookup(mos, snapobj, name, 8, 1, value); 343ab04eb8eStimh return (err); 344ab04eb8eStimh } 345ab04eb8eStimh 3463b2aab18SMatthew Ahrens int 347a2afb611SJerry Jelinek dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, 348a2afb611SJerry Jelinek boolean_t adj_cnt) 349ab04eb8eStimh { 350745cd3c5Smaybee objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 351c1379625SJustin T. Gibbs uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 352ab04eb8eStimh matchtype_t mt; 353ab04eb8eStimh int err; 354ab04eb8eStimh 35571eb0538SChris Kirby dsl_dir_snap_cmtime_update(ds->ds_dir); 35671eb0538SChris Kirby 357c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) 358ab04eb8eStimh mt = MT_FIRST; 359ab04eb8eStimh else 360ab04eb8eStimh mt = MT_EXACT; 361ab04eb8eStimh 362745cd3c5Smaybee err = zap_remove_norm(mos, snapobj, name, mt, tx); 363ab04eb8eStimh if (err == ENOTSUP && mt == MT_FIRST) 364745cd3c5Smaybee err = zap_remove(mos, snapobj, name, tx); 365a2afb611SJerry Jelinek 366a2afb611SJerry Jelinek if (err == 0 && adj_cnt) 367a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(ds->ds_dir, -1, 368a2afb611SJerry Jelinek DD_FIELD_SNAPSHOT_COUNT, tx); 369a2afb611SJerry Jelinek 370ab04eb8eStimh return (err); 371ab04eb8eStimh } 372ab04eb8eStimh 373e57a022bSJustin T. Gibbs boolean_t 374e57a022bSJustin T. Gibbs dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) 375e57a022bSJustin T. Gibbs { 3769d47dec0SJustin T. Gibbs dmu_buf_t *dbuf = ds->ds_dbuf; 3779d47dec0SJustin T. Gibbs boolean_t result = B_FALSE; 3789d47dec0SJustin T. Gibbs 3799d47dec0SJustin T. Gibbs if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, 3809d47dec0SJustin T. Gibbs ds->ds_object, DMU_BONUS_BLKID, tag)) { 3819d47dec0SJustin T. Gibbs 3829d47dec0SJustin T. Gibbs if (ds == dmu_buf_get_user(dbuf)) 3839d47dec0SJustin T. Gibbs result = B_TRUE; 3849d47dec0SJustin T. Gibbs else 3859d47dec0SJustin T. Gibbs dmu_buf_rele(dbuf, tag); 3869d47dec0SJustin T. Gibbs } 3879d47dec0SJustin T. Gibbs 3889d47dec0SJustin T. Gibbs return (result); 389e57a022bSJustin T. Gibbs } 390e57a022bSJustin T. Gibbs 3913b2aab18SMatthew Ahrens int 3923b2aab18SMatthew Ahrens dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, 393745cd3c5Smaybee dsl_dataset_t **dsp) 394fa9e4066Sahrens { 395fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 396fa9e4066Sahrens dmu_buf_t *dbuf; 397fa9e4066Sahrens dsl_dataset_t *ds; 398ea8dc4b6Seschrock int err; 399a7f53a56SChris Kirby dmu_object_info_t doi; 400fa9e4066Sahrens 4013b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 402fa9e4066Sahrens 403ea8dc4b6Seschrock err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); 4043b2aab18SMatthew Ahrens if (err != 0) 405ea8dc4b6Seschrock return (err); 406a7f53a56SChris Kirby 407a7f53a56SChris Kirby /* Make sure dsobj has the correct object type. */ 408a7f53a56SChris Kirby dmu_object_info_from_db(dbuf, &doi); 4092acef22dSMatthew Ahrens if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { 410b287be1bSWill Andrews dmu_buf_rele(dbuf, tag); 411be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 412b287be1bSWill Andrews } 413a7f53a56SChris Kirby 414fa9e4066Sahrens ds = dmu_buf_get_user(dbuf); 415fa9e4066Sahrens if (ds == NULL) { 416d5285caeSGeorge Wilson dsl_dataset_t *winner = NULL; 417fa9e4066Sahrens 418fa9e4066Sahrens ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); 419fa9e4066Sahrens ds->ds_dbuf = dbuf; 420fa9e4066Sahrens ds->ds_object = dsobj; 421bc9014e6SJustin Gibbs ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; 422fa9e4066Sahrens 4235ad82045Snd mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); 42491ebeef5Sahrens mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); 4254e3c9f44SBill Pijewski mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); 4263b2aab18SMatthew Ahrens refcount_create(&ds->ds_longholds); 4275ad82045Snd 428cde58dbcSMatthew Ahrens bplist_create(&ds->ds_pending_deadlist); 429cde58dbcSMatthew Ahrens dsl_deadlist_open(&ds->ds_deadlist, 430c1379625SJustin T. Gibbs mos, dsl_dataset_phys(ds)->ds_deadlist_obj); 431cde58dbcSMatthew Ahrens 4324e3c9f44SBill Pijewski list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), 4334e3c9f44SBill Pijewski offsetof(dmu_sendarg_t, dsa_link)); 4344e3c9f44SBill Pijewski 435b5152584SMatthew Ahrens if (doi.doi_type == DMU_OTN_ZAP_METADATA) { 436ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 437ca0cc391SMatthew Ahrens if (!(spa_feature_table[f].fi_flags & 438ca0cc391SMatthew Ahrens ZFEATURE_FLAG_PER_DATASET)) 439ca0cc391SMatthew Ahrens continue; 440ca0cc391SMatthew Ahrens err = zap_contains(mos, dsobj, 441ca0cc391SMatthew Ahrens spa_feature_table[f].fi_guid); 442ca0cc391SMatthew Ahrens if (err == 0) { 443ca0cc391SMatthew Ahrens ds->ds_feature_inuse[f] = B_TRUE; 444ca0cc391SMatthew Ahrens } else { 445ca0cc391SMatthew Ahrens ASSERT3U(err, ==, ENOENT); 446ca0cc391SMatthew Ahrens err = 0; 447ca0cc391SMatthew Ahrens } 448e1f3c208SJustin T. Gibbs } 449b5152584SMatthew Ahrens } 450b5152584SMatthew Ahrens 451ca0cc391SMatthew Ahrens err = dsl_dir_hold_obj(dp, 452ca0cc391SMatthew Ahrens dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds, &ds->ds_dir); 4533b2aab18SMatthew Ahrens if (err != 0) { 4545ad82045Snd mutex_destroy(&ds->ds_lock); 45591ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 456d2b3cbbdSJorgen Lundman mutex_destroy(&ds->ds_sendstream_lock); 4573b2aab18SMatthew Ahrens refcount_destroy(&ds->ds_longholds); 458cde58dbcSMatthew Ahrens bplist_destroy(&ds->ds_pending_deadlist); 459cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 460ea8dc4b6Seschrock kmem_free(ds, sizeof (dsl_dataset_t)); 461ea8dc4b6Seschrock dmu_buf_rele(dbuf, tag); 462ea8dc4b6Seschrock return (err); 463ea8dc4b6Seschrock } 464fa9e4066Sahrens 465bc9014e6SJustin Gibbs if (!ds->ds_is_snapshot) { 466fa9e4066Sahrens ds->ds_snapname[0] = '\0'; 467c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { 4683b2aab18SMatthew Ahrens err = dsl_dataset_hold_obj(dp, 469c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, 470745cd3c5Smaybee ds, &ds->ds_prev); 471fa9e4066Sahrens } 47278f17100SMatthew Ahrens if (doi.doi_type == DMU_OTN_ZAP_METADATA) { 47378f17100SMatthew Ahrens int zaperr = zap_lookup(mos, ds->ds_object, 47478f17100SMatthew Ahrens DS_FIELD_BOOKMARK_NAMES, 47578f17100SMatthew Ahrens sizeof (ds->ds_bookmarks), 1, 47678f17100SMatthew Ahrens &ds->ds_bookmarks); 47778f17100SMatthew Ahrens if (zaperr != ENOENT) 47878f17100SMatthew Ahrens VERIFY0(zaperr); 47978f17100SMatthew Ahrens } 480842727c2SChris Kirby } else { 481842727c2SChris Kirby if (zfs_flags & ZFS_DEBUG_SNAPNAMES) 482842727c2SChris Kirby err = dsl_dataset_get_snapname(ds); 483c1379625SJustin T. Gibbs if (err == 0 && 484c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { 485842727c2SChris Kirby err = zap_count( 486842727c2SChris Kirby ds->ds_dir->dd_pool->dp_meta_objset, 487c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_userrefs_obj, 488842727c2SChris Kirby &ds->ds_userrefs); 489842727c2SChris Kirby } 490fa9e4066Sahrens } 491fa9e4066Sahrens 492bc9014e6SJustin Gibbs if (err == 0 && !ds->ds_is_snapshot) { 4933b2aab18SMatthew Ahrens err = dsl_prop_get_int_ds(ds, 4943b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 4953b2aab18SMatthew Ahrens &ds->ds_reserved); 496cb625fb5Sck if (err == 0) { 4973b2aab18SMatthew Ahrens err = dsl_prop_get_int_ds(ds, 4983b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 4993b2aab18SMatthew Ahrens &ds->ds_quota); 500cb625fb5Sck } 501cb625fb5Sck } else { 502cb625fb5Sck ds->ds_reserved = ds->ds_quota = 0; 503cb625fb5Sck } 504cb625fb5Sck 505bc9014e6SJustin Gibbs dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict, &ds->ds_dbuf); 506bc9014e6SJustin Gibbs if (err == 0) 507bc9014e6SJustin Gibbs winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); 508bc9014e6SJustin Gibbs 509bc9014e6SJustin Gibbs if (err != 0 || winner != NULL) { 510cde58dbcSMatthew Ahrens bplist_destroy(&ds->ds_pending_deadlist); 511cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 512745cd3c5Smaybee if (ds->ds_prev) 5133b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 5143b2aab18SMatthew Ahrens dsl_dir_rele(ds->ds_dir, ds); 5155ad82045Snd mutex_destroy(&ds->ds_lock); 51691ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 517d2b3cbbdSJorgen Lundman mutex_destroy(&ds->ds_sendstream_lock); 5183b2aab18SMatthew Ahrens refcount_destroy(&ds->ds_longholds); 519fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 5203b2aab18SMatthew Ahrens if (err != 0) { 521ea8dc4b6Seschrock dmu_buf_rele(dbuf, tag); 522ea8dc4b6Seschrock return (err); 523ea8dc4b6Seschrock } 524fa9e4066Sahrens ds = winner; 525fa9e4066Sahrens } else { 52691ebeef5Sahrens ds->ds_fsid_guid = 527c1379625SJustin T. Gibbs unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); 528fa9e4066Sahrens } 529fa9e4066Sahrens } 530fa9e4066Sahrens ASSERT3P(ds->ds_dbuf, ==, dbuf); 531c1379625SJustin T. Gibbs ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); 532c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || 533afc6333aSahrens spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || 53484db2a68Sahrens dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); 535ea8dc4b6Seschrock *dsp = ds; 536ea8dc4b6Seschrock return (0); 537fa9e4066Sahrens } 538fa9e4066Sahrens 539745cd3c5Smaybee int 5403b2aab18SMatthew Ahrens dsl_dataset_hold(dsl_pool_t *dp, const char *name, 541503ad85cSMatthew Ahrens void *tag, dsl_dataset_t **dsp) 542fa9e4066Sahrens { 543fa9e4066Sahrens dsl_dir_t *dd; 544745cd3c5Smaybee const char *snapname; 545fa9e4066Sahrens uint64_t obj; 546fa9e4066Sahrens int err = 0; 547a2cdcdd2SPaul Dagnelie dsl_dataset_t *ds; 548fa9e4066Sahrens 5493b2aab18SMatthew Ahrens err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); 5503b2aab18SMatthew Ahrens if (err != 0) 551ea8dc4b6Seschrock return (err); 552fa9e4066Sahrens 5533b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 554c1379625SJustin T. Gibbs obj = dsl_dir_phys(dd)->dd_head_dataset_obj; 5553b2aab18SMatthew Ahrens if (obj != 0) 556a2cdcdd2SPaul Dagnelie err = dsl_dataset_hold_obj(dp, obj, tag, &ds); 557745cd3c5Smaybee else 558be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 559fa9e4066Sahrens 560745cd3c5Smaybee /* we may be looking for a snapshot */ 561745cd3c5Smaybee if (err == 0 && snapname != NULL) { 562a2cdcdd2SPaul Dagnelie dsl_dataset_t *snap_ds; 563fa9e4066Sahrens 564745cd3c5Smaybee if (*snapname++ != '@') { 565a2cdcdd2SPaul Dagnelie dsl_dataset_rele(ds, tag); 5663b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 567be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 568fa9e4066Sahrens } 569fa9e4066Sahrens 570745cd3c5Smaybee dprintf("looking for snapshot '%s'\n", snapname); 571a2cdcdd2SPaul Dagnelie err = dsl_dataset_snap_lookup(ds, snapname, &obj); 572745cd3c5Smaybee if (err == 0) 573a2cdcdd2SPaul Dagnelie err = dsl_dataset_hold_obj(dp, obj, tag, &snap_ds); 574a2cdcdd2SPaul Dagnelie dsl_dataset_rele(ds, tag); 575745cd3c5Smaybee 5763b2aab18SMatthew Ahrens if (err == 0) { 577a2cdcdd2SPaul Dagnelie mutex_enter(&snap_ds->ds_lock); 578a2cdcdd2SPaul Dagnelie if (snap_ds->ds_snapname[0] == 0) 579a2cdcdd2SPaul Dagnelie (void) strlcpy(snap_ds->ds_snapname, snapname, 580a2cdcdd2SPaul Dagnelie sizeof (snap_ds->ds_snapname)); 581a2cdcdd2SPaul Dagnelie mutex_exit(&snap_ds->ds_lock); 582a2cdcdd2SPaul Dagnelie ds = snap_ds; 583fa9e4066Sahrens } 584fa9e4066Sahrens } 585a2cdcdd2SPaul Dagnelie if (err == 0) 586a2cdcdd2SPaul Dagnelie *dsp = ds; 5873b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 588fa9e4066Sahrens return (err); 589fa9e4066Sahrens } 590fa9e4066Sahrens 591fa9e4066Sahrens int 5923b2aab18SMatthew Ahrens dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, 5933b2aab18SMatthew Ahrens void *tag, dsl_dataset_t **dsp) 5943b2aab18SMatthew Ahrens { 5953b2aab18SMatthew Ahrens int err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp); 5963b2aab18SMatthew Ahrens if (err != 0) 5973b2aab18SMatthew Ahrens return (err); 5983b2aab18SMatthew Ahrens if (!dsl_dataset_tryown(*dsp, tag)) { 5993b2aab18SMatthew Ahrens dsl_dataset_rele(*dsp, tag); 6003b2aab18SMatthew Ahrens *dsp = NULL; 601be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 6023b2aab18SMatthew Ahrens } 6033b2aab18SMatthew Ahrens return (0); 6043b2aab18SMatthew Ahrens } 6053b2aab18SMatthew Ahrens 6063b2aab18SMatthew Ahrens int 6073b2aab18SMatthew Ahrens dsl_dataset_own(dsl_pool_t *dp, const char *name, 608503ad85cSMatthew Ahrens void *tag, dsl_dataset_t **dsp) 609fa9e4066Sahrens { 6103b2aab18SMatthew Ahrens int err = dsl_dataset_hold(dp, name, tag, dsp); 6113b2aab18SMatthew Ahrens if (err != 0) 612745cd3c5Smaybee return (err); 6133b2aab18SMatthew Ahrens if (!dsl_dataset_tryown(*dsp, tag)) { 614503ad85cSMatthew Ahrens dsl_dataset_rele(*dsp, tag); 615be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 616745cd3c5Smaybee } 617745cd3c5Smaybee return (0); 618fa9e4066Sahrens } 619fa9e4066Sahrens 6203b2aab18SMatthew Ahrens /* 6213b2aab18SMatthew Ahrens * See the comment above dsl_pool_hold() for details. In summary, a long 6223b2aab18SMatthew Ahrens * hold is used to prevent destruction of a dataset while the pool hold 6233b2aab18SMatthew Ahrens * is dropped, allowing other concurrent operations (e.g. spa_sync()). 6243b2aab18SMatthew Ahrens * 6253b2aab18SMatthew Ahrens * The dataset and pool must be held when this function is called. After it 6263b2aab18SMatthew Ahrens * is called, the pool hold may be released while the dataset is still held 6273b2aab18SMatthew Ahrens * and accessed. 6283b2aab18SMatthew Ahrens */ 6293b2aab18SMatthew Ahrens void 6303b2aab18SMatthew Ahrens dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) 6313b2aab18SMatthew Ahrens { 6323b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 6333b2aab18SMatthew Ahrens (void) refcount_add(&ds->ds_longholds, tag); 6343b2aab18SMatthew Ahrens } 6353b2aab18SMatthew Ahrens 6363b2aab18SMatthew Ahrens void 6373b2aab18SMatthew Ahrens dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) 6383b2aab18SMatthew Ahrens { 6393b2aab18SMatthew Ahrens (void) refcount_remove(&ds->ds_longholds, tag); 6403b2aab18SMatthew Ahrens } 6413b2aab18SMatthew Ahrens 6423b2aab18SMatthew Ahrens /* Return B_TRUE if there are any long holds on this dataset. */ 6433b2aab18SMatthew Ahrens boolean_t 6443b2aab18SMatthew Ahrens dsl_dataset_long_held(dsl_dataset_t *ds) 6453b2aab18SMatthew Ahrens { 6463b2aab18SMatthew Ahrens return (!refcount_is_zero(&ds->ds_longholds)); 6473b2aab18SMatthew Ahrens } 6483b2aab18SMatthew Ahrens 649fa9e4066Sahrens void 650fa9e4066Sahrens dsl_dataset_name(dsl_dataset_t *ds, char *name) 651fa9e4066Sahrens { 652fa9e4066Sahrens if (ds == NULL) { 653fa9e4066Sahrens (void) strcpy(name, "mos"); 654fa9e4066Sahrens } else { 655fa9e4066Sahrens dsl_dir_name(ds->ds_dir, name); 6563b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 657fa9e4066Sahrens if (ds->ds_snapname[0]) { 658fa9e4066Sahrens (void) strcat(name, "@"); 659745cd3c5Smaybee /* 660745cd3c5Smaybee * We use a "recursive" mutex so that we 661745cd3c5Smaybee * can call dprintf_ds() with ds_lock held. 662745cd3c5Smaybee */ 663fa9e4066Sahrens if (!MUTEX_HELD(&ds->ds_lock)) { 664fa9e4066Sahrens mutex_enter(&ds->ds_lock); 665fa9e4066Sahrens (void) strcat(name, ds->ds_snapname); 666fa9e4066Sahrens mutex_exit(&ds->ds_lock); 667fa9e4066Sahrens } else { 668fa9e4066Sahrens (void) strcat(name, ds->ds_snapname); 669fa9e4066Sahrens } 670fa9e4066Sahrens } 671fa9e4066Sahrens } 672fa9e4066Sahrens } 673fa9e4066Sahrens 6743cb34c60Sahrens void 675745cd3c5Smaybee dsl_dataset_rele(dsl_dataset_t *ds, void *tag) 6763cb34c60Sahrens { 6773b2aab18SMatthew Ahrens dmu_buf_rele(ds->ds_dbuf, tag); 678745cd3c5Smaybee } 679745cd3c5Smaybee 680745cd3c5Smaybee void 681503ad85cSMatthew Ahrens dsl_dataset_disown(dsl_dataset_t *ds, void *tag) 682745cd3c5Smaybee { 683d808a4fcSJustin T. Gibbs ASSERT3P(ds->ds_owner, ==, tag); 684d808a4fcSJustin T. Gibbs ASSERT(ds->ds_dbuf != NULL); 685745cd3c5Smaybee 6863cb34c60Sahrens mutex_enter(&ds->ds_lock); 687745cd3c5Smaybee ds->ds_owner = NULL; 6883cb34c60Sahrens mutex_exit(&ds->ds_lock); 6893b2aab18SMatthew Ahrens dsl_dataset_long_rele(ds, tag); 690d808a4fcSJustin T. Gibbs dsl_dataset_rele(ds, tag); 6913cb34c60Sahrens } 6923cb34c60Sahrens 6933cb34c60Sahrens boolean_t 6943b2aab18SMatthew Ahrens dsl_dataset_tryown(dsl_dataset_t *ds, void *tag) 6953cb34c60Sahrens { 696745cd3c5Smaybee boolean_t gotit = FALSE; 697745cd3c5Smaybee 6983cb34c60Sahrens mutex_enter(&ds->ds_lock); 6993b2aab18SMatthew Ahrens if (ds->ds_owner == NULL && !DS_IS_INCONSISTENT(ds)) { 700503ad85cSMatthew Ahrens ds->ds_owner = tag; 7013b2aab18SMatthew Ahrens dsl_dataset_long_hold(ds, tag); 702745cd3c5Smaybee gotit = TRUE; 7033cb34c60Sahrens } 7043cb34c60Sahrens mutex_exit(&ds->ds_lock); 705745cd3c5Smaybee return (gotit); 706745cd3c5Smaybee } 707745cd3c5Smaybee 708ca0cc391SMatthew Ahrens static void 709ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) 710ca0cc391SMatthew Ahrens { 711ca0cc391SMatthew Ahrens spa_t *spa = dmu_tx_pool(tx)->dp_spa; 712ca0cc391SMatthew Ahrens objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; 713ca0cc391SMatthew Ahrens uint64_t zero = 0; 714ca0cc391SMatthew Ahrens 715ca0cc391SMatthew Ahrens VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); 716ca0cc391SMatthew Ahrens 717ca0cc391SMatthew Ahrens spa_feature_incr(spa, f, tx); 718ca0cc391SMatthew Ahrens dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); 719ca0cc391SMatthew Ahrens 720ca0cc391SMatthew Ahrens VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, 721ca0cc391SMatthew Ahrens sizeof (zero), 1, &zero, tx)); 722ca0cc391SMatthew Ahrens } 723ca0cc391SMatthew Ahrens 724ca0cc391SMatthew Ahrens void 725ca0cc391SMatthew Ahrens dsl_dataset_deactivate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) 726ca0cc391SMatthew Ahrens { 727ca0cc391SMatthew Ahrens spa_t *spa = dmu_tx_pool(tx)->dp_spa; 728ca0cc391SMatthew Ahrens objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; 729ca0cc391SMatthew Ahrens 730ca0cc391SMatthew Ahrens VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); 731ca0cc391SMatthew Ahrens 732ca0cc391SMatthew Ahrens VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx)); 733ca0cc391SMatthew Ahrens spa_feature_decr(spa, f, tx); 734ca0cc391SMatthew Ahrens } 735ca0cc391SMatthew Ahrens 7361d452cf5Sahrens uint64_t 737088f3894Sahrens dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, 738ab04eb8eStimh uint64_t flags, dmu_tx_t *tx) 739fa9e4066Sahrens { 7403cb34c60Sahrens dsl_pool_t *dp = dd->dd_pool; 741fa9e4066Sahrens dmu_buf_t *dbuf; 742fa9e4066Sahrens dsl_dataset_phys_t *dsphys; 7433cb34c60Sahrens uint64_t dsobj; 744fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 745fa9e4066Sahrens 746088f3894Sahrens if (origin == NULL) 747088f3894Sahrens origin = dp->dp_origin_snap; 748088f3894Sahrens 7493cb34c60Sahrens ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); 750c1379625SJustin T. Gibbs ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); 751fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 752c1379625SJustin T. Gibbs ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); 753fa9e4066Sahrens 7541649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 7551649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 7563b2aab18SMatthew Ahrens VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 757fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 758fa9e4066Sahrens dsphys = dbuf->db_data; 759745cd3c5Smaybee bzero(dsphys, sizeof (dsl_dataset_phys_t)); 760fa9e4066Sahrens dsphys->ds_dir_obj = dd->dd_object; 761ab04eb8eStimh dsphys->ds_flags = flags; 762fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 763fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 764fa9e4066Sahrens sizeof (dsphys->ds_guid)); 765fa9e4066Sahrens dsphys->ds_snapnames_zapobj = 766ab04eb8eStimh zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, 767ab04eb8eStimh DMU_OT_NONE, 0, tx); 768fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 769088f3894Sahrens dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; 770a9799022Sck 771cde58dbcSMatthew Ahrens if (origin == NULL) { 772cde58dbcSMatthew Ahrens dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); 773cde58dbcSMatthew Ahrens } else { 7743b2aab18SMatthew Ahrens dsl_dataset_t *ohds; /* head of the origin snapshot */ 775cde58dbcSMatthew Ahrens 7763cb34c60Sahrens dsphys->ds_prev_snap_obj = origin->ds_object; 777fa9e4066Sahrens dsphys->ds_prev_snap_txg = 778c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_creation_txg; 779ad135b5dSChristopher Siden dsphys->ds_referenced_bytes = 780c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_referenced_bytes; 781fa9e4066Sahrens dsphys->ds_compressed_bytes = 782c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_compressed_bytes; 783fa9e4066Sahrens dsphys->ds_uncompressed_bytes = 784c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_uncompressed_bytes; 785c1379625SJustin T. Gibbs dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; 78642fcb65eSMatthew Ahrens 78742fcb65eSMatthew Ahrens /* 78842fcb65eSMatthew Ahrens * Inherit flags that describe the dataset's contents 78942fcb65eSMatthew Ahrens * (INCONSISTENT) or properties (Case Insensitive). 79042fcb65eSMatthew Ahrens */ 791c1379625SJustin T. Gibbs dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & 79242fcb65eSMatthew Ahrens (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); 793fa9e4066Sahrens 794ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 795ca0cc391SMatthew Ahrens if (origin->ds_feature_inuse[f]) 796ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(dsobj, f, tx); 797ca0cc391SMatthew Ahrens } 798b5152584SMatthew Ahrens 7993cb34c60Sahrens dmu_buf_will_dirty(origin->ds_dbuf, tx); 800c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_num_children++; 801fa9e4066Sahrens 8023b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 803c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, 804c1379625SJustin T. Gibbs FTAG, &ohds)); 805cde58dbcSMatthew Ahrens dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, 806cde58dbcSMatthew Ahrens dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); 807cde58dbcSMatthew Ahrens dsl_dataset_rele(ohds, FTAG); 808cde58dbcSMatthew Ahrens 809088f3894Sahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { 810c1379625SJustin T. Gibbs if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { 811c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_next_clones_obj = 812088f3894Sahrens zap_create(mos, 813088f3894Sahrens DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); 814088f3894Sahrens } 8153b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 816c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_next_clones_obj, 817c1379625SJustin T. Gibbs dsobj, tx)); 818088f3894Sahrens } 819088f3894Sahrens 820fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 821c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; 822cde58dbcSMatthew Ahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 823c1379625SJustin T. Gibbs if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { 824cde58dbcSMatthew Ahrens dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); 825c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_clones = 826cde58dbcSMatthew Ahrens zap_create(mos, 827cde58dbcSMatthew Ahrens DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); 828cde58dbcSMatthew Ahrens } 8293b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 830c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_clones, 831c1379625SJustin T. Gibbs dsobj, tx)); 832cde58dbcSMatthew Ahrens } 833fa9e4066Sahrens } 834ab04eb8eStimh 835ab04eb8eStimh if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) 836ab04eb8eStimh dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 837ab04eb8eStimh 838ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 839fa9e4066Sahrens 840fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 841c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; 8423cb34c60Sahrens 8433cb34c60Sahrens return (dsobj); 8443cb34c60Sahrens } 8453cb34c60Sahrens 8463b2aab18SMatthew Ahrens static void 8473b2aab18SMatthew Ahrens dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) 8483b2aab18SMatthew Ahrens { 8493b2aab18SMatthew Ahrens objset_t *os; 8503b2aab18SMatthew Ahrens 8513b2aab18SMatthew Ahrens VERIFY0(dmu_objset_from_ds(ds, &os)); 8523b2aab18SMatthew Ahrens bzero(&os->os_zil_header, sizeof (os->os_zil_header)); 8533b2aab18SMatthew Ahrens dsl_dataset_dirty(ds, tx); 8543b2aab18SMatthew Ahrens } 8553b2aab18SMatthew Ahrens 8563cb34c60Sahrens uint64_t 857ab04eb8eStimh dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, 858ab04eb8eStimh dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) 8593cb34c60Sahrens { 8603cb34c60Sahrens dsl_pool_t *dp = pdd->dd_pool; 8613cb34c60Sahrens uint64_t dsobj, ddobj; 8623cb34c60Sahrens dsl_dir_t *dd; 8633cb34c60Sahrens 8643b2aab18SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 8653cb34c60Sahrens ASSERT(lastname[0] != '@'); 8663cb34c60Sahrens 867088f3894Sahrens ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); 8683b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); 8693cb34c60Sahrens 8703b2aab18SMatthew Ahrens dsobj = dsl_dataset_create_sync_dd(dd, origin, 8713b2aab18SMatthew Ahrens flags & ~DS_CREATE_FLAG_NODIRTY, tx); 8723cb34c60Sahrens 8733cb34c60Sahrens dsl_deleg_set_create_perms(dd, tx, cr); 8743cb34c60Sahrens 875a2afb611SJerry Jelinek /* 876a2afb611SJerry Jelinek * Since we're creating a new node we know it's a leaf, so we can 877a2afb611SJerry Jelinek * initialize the counts if the limit feature is active. 878a2afb611SJerry Jelinek */ 879a2afb611SJerry Jelinek if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { 880a2afb611SJerry Jelinek uint64_t cnt = 0; 881a2afb611SJerry Jelinek objset_t *os = dd->dd_pool->dp_meta_objset; 882a2afb611SJerry Jelinek 883a2afb611SJerry Jelinek dsl_dir_zapify(dd, tx); 884a2afb611SJerry Jelinek VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, 885a2afb611SJerry Jelinek sizeof (cnt), 1, &cnt, tx)); 886a2afb611SJerry Jelinek VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, 887a2afb611SJerry Jelinek sizeof (cnt), 1, &cnt, tx)); 888a2afb611SJerry Jelinek } 889a2afb611SJerry Jelinek 8903b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 891fa9e4066Sahrens 892feaa74e4SMark Maybee /* 893feaa74e4SMark Maybee * If we are creating a clone, make sure we zero out any stale 894feaa74e4SMark Maybee * data from the origin snapshots zil header. 895feaa74e4SMark Maybee */ 8963b2aab18SMatthew Ahrens if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { 897feaa74e4SMark Maybee dsl_dataset_t *ds; 898feaa74e4SMark Maybee 8993b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); 9003b2aab18SMatthew Ahrens dsl_dataset_zero_zil(ds, tx); 901feaa74e4SMark Maybee dsl_dataset_rele(ds, FTAG); 902feaa74e4SMark Maybee } 903feaa74e4SMark Maybee 9041d452cf5Sahrens return (dsobj); 905fa9e4066Sahrens } 906fa9e4066Sahrens 9071d452cf5Sahrens /* 9083b2aab18SMatthew Ahrens * The unique space in the head dataset can be calculated by subtracting 9093b2aab18SMatthew Ahrens * the space used in the most recent snapshot, that is still being used 9103b2aab18SMatthew Ahrens * in this file system, from the space currently in use. To figure out 9113b2aab18SMatthew Ahrens * the space in the most recent snapshot still in use, we need to take 9123b2aab18SMatthew Ahrens * the total space used in the snapshot and subtract out the space that 9133b2aab18SMatthew Ahrens * has been freed up since the snapshot was taken. 9141d452cf5Sahrens */ 9153b2aab18SMatthew Ahrens void 9163b2aab18SMatthew Ahrens dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) 9171d452cf5Sahrens { 9183b2aab18SMatthew Ahrens uint64_t mrs_used; 9193b2aab18SMatthew Ahrens uint64_t dlused, dlcomp, dluncomp; 9201d452cf5Sahrens 921bc9014e6SJustin Gibbs ASSERT(!ds->ds_is_snapshot); 9221d452cf5Sahrens 923c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) 924c1379625SJustin T. Gibbs mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; 9253b2aab18SMatthew Ahrens else 9263b2aab18SMatthew Ahrens mrs_used = 0; 927842727c2SChris Kirby 9283b2aab18SMatthew Ahrens dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); 929fa9e4066Sahrens 9303b2aab18SMatthew Ahrens ASSERT3U(dlused, <=, mrs_used); 931c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes = 932c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); 93319b94df9SMatthew Ahrens 9343b2aab18SMatthew Ahrens if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= 9353b2aab18SMatthew Ahrens SPA_VERSION_UNIQUE_ACCURATE) 936c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 937fa9e4066Sahrens } 938fa9e4066Sahrens 9393b2aab18SMatthew Ahrens void 9403b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, 9413b2aab18SMatthew Ahrens dmu_tx_t *tx) 942842727c2SChris Kirby { 9433b2aab18SMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 9443b2aab18SMatthew Ahrens uint64_t count; 9453b2aab18SMatthew Ahrens int err; 9463b2aab18SMatthew Ahrens 947c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); 948c1379625SJustin T. Gibbs err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 949c1379625SJustin T. Gibbs obj, tx); 9503b2aab18SMatthew Ahrens /* 9513b2aab18SMatthew Ahrens * The err should not be ENOENT, but a bug in a previous version 9523b2aab18SMatthew Ahrens * of the code could cause upgrade_clones_cb() to not set 9533b2aab18SMatthew Ahrens * ds_next_snap_obj when it should, leading to a missing entry. 9543b2aab18SMatthew Ahrens * If we knew that the pool was created after 9553b2aab18SMatthew Ahrens * SPA_VERSION_NEXT_CLONES, we could assert that it isn't 9563b2aab18SMatthew Ahrens * ENOENT. However, at least we can check that we don't have 9573b2aab18SMatthew Ahrens * too many entries in the next_clones_obj even after failing to 9583b2aab18SMatthew Ahrens * remove this one. 9593b2aab18SMatthew Ahrens */ 9603b2aab18SMatthew Ahrens if (err != ENOENT) 9613b2aab18SMatthew Ahrens VERIFY0(err); 962c1379625SJustin T. Gibbs ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 9633b2aab18SMatthew Ahrens &count)); 964c1379625SJustin T. Gibbs ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); 9653b2aab18SMatthew Ahrens } 966842727c2SChris Kirby 967842727c2SChris Kirby 9683b2aab18SMatthew Ahrens blkptr_t * 9693b2aab18SMatthew Ahrens dsl_dataset_get_blkptr(dsl_dataset_t *ds) 9703b2aab18SMatthew Ahrens { 971c1379625SJustin T. Gibbs return (&dsl_dataset_phys(ds)->ds_bp); 972842727c2SChris Kirby } 973842727c2SChris Kirby 9743b2aab18SMatthew Ahrens void 9753b2aab18SMatthew Ahrens dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) 976842727c2SChris Kirby { 9773b2aab18SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 9783b2aab18SMatthew Ahrens /* If it's the meta-objset, set dp_meta_rootbp */ 9793b2aab18SMatthew Ahrens if (ds == NULL) { 9803b2aab18SMatthew Ahrens tx->tx_pool->dp_meta_rootbp = *bp; 9813b2aab18SMatthew Ahrens } else { 9823b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 983c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_bp = *bp; 984842727c2SChris Kirby } 9853b2aab18SMatthew Ahrens } 986842727c2SChris Kirby 9873b2aab18SMatthew Ahrens spa_t * 9883b2aab18SMatthew Ahrens dsl_dataset_get_spa(dsl_dataset_t *ds) 9893b2aab18SMatthew Ahrens { 9903b2aab18SMatthew Ahrens return (ds->ds_dir->dd_pool->dp_spa); 991842727c2SChris Kirby } 992842727c2SChris Kirby 9933b2aab18SMatthew Ahrens void 9943b2aab18SMatthew Ahrens dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) 995fa9e4066Sahrens { 9963b2aab18SMatthew Ahrens dsl_pool_t *dp; 997842727c2SChris Kirby 9983b2aab18SMatthew Ahrens if (ds == NULL) /* this is the meta-objset */ 9993b2aab18SMatthew Ahrens return; 10001d452cf5Sahrens 10013b2aab18SMatthew Ahrens ASSERT(ds->ds_objset != NULL); 1002fa9e4066Sahrens 1003c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) 10043b2aab18SMatthew Ahrens panic("dirtying snapshot!"); 1005fa9e4066Sahrens 10063b2aab18SMatthew Ahrens dp = ds->ds_dir->dd_pool; 1007ce636f8bSMatthew Ahrens 10083b2aab18SMatthew Ahrens if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 10093b2aab18SMatthew Ahrens /* up the hold count until we can be written out */ 10103b2aab18SMatthew Ahrens dmu_buf_add_ref(ds->ds_dbuf, ds); 10113b2aab18SMatthew Ahrens } 10123b2aab18SMatthew Ahrens } 1013fa9e4066Sahrens 10142e2c1355SMatthew Ahrens boolean_t 10152e2c1355SMatthew Ahrens dsl_dataset_is_dirty(dsl_dataset_t *ds) 10162e2c1355SMatthew Ahrens { 10172e2c1355SMatthew Ahrens for (int t = 0; t < TXG_SIZE; t++) { 10182e2c1355SMatthew Ahrens if (txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, 10192e2c1355SMatthew Ahrens ds, t)) 10202e2c1355SMatthew Ahrens return (B_TRUE); 10212e2c1355SMatthew Ahrens } 10222e2c1355SMatthew Ahrens return (B_FALSE); 10232e2c1355SMatthew Ahrens } 10242e2c1355SMatthew Ahrens 1025fa9e4066Sahrens static int 10263b2aab18SMatthew Ahrens dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) 1027fa9e4066Sahrens { 10283b2aab18SMatthew Ahrens uint64_t asize; 1029fa9e4066Sahrens 10303b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) 103188b7b0f2SMatthew Ahrens return (0); 1032fa9e4066Sahrens 1033e1930233Sbonwick /* 10343b2aab18SMatthew Ahrens * If there's an fs-only reservation, any blocks that might become 10353b2aab18SMatthew Ahrens * owned by the snapshot dataset must be accommodated by space 10363b2aab18SMatthew Ahrens * outside of the reservation. 1037e1930233Sbonwick */ 10383b2aab18SMatthew Ahrens ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); 1039c1379625SJustin T. Gibbs asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); 10403b2aab18SMatthew Ahrens if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) 1041be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 1042e1930233Sbonwick 10433cb34c60Sahrens /* 10443b2aab18SMatthew Ahrens * Propagate any reserved space for this snapshot to other 10453b2aab18SMatthew Ahrens * snapshot checks in this sync group. 10463cb34c60Sahrens */ 10473b2aab18SMatthew Ahrens if (asize > 0) 10483b2aab18SMatthew Ahrens dsl_dir_willuse_space(ds->ds_dir, asize, tx); 10493cb34c60Sahrens 1050e1930233Sbonwick return (0); 1051e1930233Sbonwick } 1052e1930233Sbonwick 10533b2aab18SMatthew Ahrens typedef struct dsl_dataset_snapshot_arg { 10543b2aab18SMatthew Ahrens nvlist_t *ddsa_snaps; 10553b2aab18SMatthew Ahrens nvlist_t *ddsa_props; 10563b2aab18SMatthew Ahrens nvlist_t *ddsa_errors; 1057a2afb611SJerry Jelinek cred_t *ddsa_cr; 10583b2aab18SMatthew Ahrens } dsl_dataset_snapshot_arg_t; 1059842727c2SChris Kirby 10603cb34c60Sahrens int 10613b2aab18SMatthew Ahrens dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, 1062a2afb611SJerry Jelinek dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) 10631d452cf5Sahrens { 10643b2aab18SMatthew Ahrens int error; 10653b2aab18SMatthew Ahrens uint64_t value; 1066fa9e4066Sahrens 10673b2aab18SMatthew Ahrens ds->ds_trysnap_txg = tx->tx_txg; 1068745cd3c5Smaybee 10693b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) 1070842727c2SChris Kirby return (0); 1071fa9e4066Sahrens 1072fa9e4066Sahrens /* 10733b2aab18SMatthew Ahrens * We don't allow multiple snapshots of the same txg. If there 10743b2aab18SMatthew Ahrens * is already one, try again. 1075fa9e4066Sahrens */ 1076c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) 1077be6fd75aSMatthew Ahrens return (SET_ERROR(EAGAIN)); 1078fa9e4066Sahrens 1079fa9e4066Sahrens /* 10803b2aab18SMatthew Ahrens * Check for conflicting snapshot name. 1081fa9e4066Sahrens */ 10823b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(ds, snapname, &value); 10833b2aab18SMatthew Ahrens if (error == 0) 1084be6fd75aSMatthew Ahrens return (SET_ERROR(EEXIST)); 10853b2aab18SMatthew Ahrens if (error != ENOENT) 10863b2aab18SMatthew Ahrens return (error); 1087842727c2SChris Kirby 1088ca48f36fSKeith M Wesolowski /* 1089ca48f36fSKeith M Wesolowski * We don't allow taking snapshots of inconsistent datasets, such as 1090ca48f36fSKeith M Wesolowski * those into which we are currently receiving. However, if we are 1091ca48f36fSKeith M Wesolowski * creating this snapshot as part of a receive, this check will be 1092ca48f36fSKeith M Wesolowski * executed atomically with respect to the completion of the receive 1093ca48f36fSKeith M Wesolowski * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this 1094ca48f36fSKeith M Wesolowski * case we ignore this, knowing it will be fixed up for us shortly in 1095ca48f36fSKeith M Wesolowski * dmu_recv_end_sync(). 1096ca48f36fSKeith M Wesolowski */ 1097ca48f36fSKeith M Wesolowski if (!recv && DS_IS_INCONSISTENT(ds)) 1098ca48f36fSKeith M Wesolowski return (SET_ERROR(EBUSY)); 1099ca48f36fSKeith M Wesolowski 1100a2afb611SJerry Jelinek /* 1101a2afb611SJerry Jelinek * Skip the check for temporary snapshots or if we have already checked 1102a2afb611SJerry Jelinek * the counts in dsl_dataset_snapshot_check. This means we really only 1103a2afb611SJerry Jelinek * check the count here when we're receiving a stream. 1104a2afb611SJerry Jelinek */ 1105a2afb611SJerry Jelinek if (cnt != 0 && cr != NULL) { 1106a2afb611SJerry Jelinek error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, 1107a2afb611SJerry Jelinek ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); 1108a2afb611SJerry Jelinek if (error != 0) 1109a2afb611SJerry Jelinek return (error); 1110a2afb611SJerry Jelinek } 1111a2afb611SJerry Jelinek 11123b2aab18SMatthew Ahrens error = dsl_dataset_snapshot_reserve_space(ds, tx); 11133b2aab18SMatthew Ahrens if (error != 0) 11143b2aab18SMatthew Ahrens return (error); 1115842727c2SChris Kirby 11161d452cf5Sahrens return (0); 11171d452cf5Sahrens } 11181d452cf5Sahrens 11193b2aab18SMatthew Ahrens static int 11203b2aab18SMatthew Ahrens dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) 1121745cd3c5Smaybee { 11223b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t *ddsa = arg; 11233b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 11243b2aab18SMatthew Ahrens nvpair_t *pair; 11253b2aab18SMatthew Ahrens int rv = 0; 11263b2aab18SMatthew Ahrens 1127a2afb611SJerry Jelinek /* 1128a2afb611SJerry Jelinek * Pre-compute how many total new snapshots will be created for each 1129a2afb611SJerry Jelinek * level in the tree and below. This is needed for validating the 1130a2afb611SJerry Jelinek * snapshot limit when either taking a recursive snapshot or when 1131a2afb611SJerry Jelinek * taking multiple snapshots. 1132a2afb611SJerry Jelinek * 1133a2afb611SJerry Jelinek * The problem is that the counts are not actually adjusted when 1134a2afb611SJerry Jelinek * we are checking, only when we finally sync. For a single snapshot, 1135a2afb611SJerry Jelinek * this is easy, the count will increase by 1 at each node up the tree, 1136a2afb611SJerry Jelinek * but its more complicated for the recursive/multiple snapshot case. 1137a2afb611SJerry Jelinek * 1138a2afb611SJerry Jelinek * The dsl_fs_ss_limit_check function does recursively check the count 1139a2afb611SJerry Jelinek * at each level up the tree but since it is validating each snapshot 1140a2afb611SJerry Jelinek * independently we need to be sure that we are validating the complete 1141a2afb611SJerry Jelinek * count for the entire set of snapshots. We do this by rolling up the 1142a2afb611SJerry Jelinek * counts for each component of the name into an nvlist and then 1143a2afb611SJerry Jelinek * checking each of those cases with the aggregated count. 1144a2afb611SJerry Jelinek * 1145a2afb611SJerry Jelinek * This approach properly handles not only the recursive snapshot 1146a2afb611SJerry Jelinek * case (where we get all of those on the ddsa_snaps list) but also 1147a2afb611SJerry Jelinek * the sibling case (e.g. snapshot a/b and a/c so that we will also 1148a2afb611SJerry Jelinek * validate the limit on 'a' using a count of 2). 1149a2afb611SJerry Jelinek * 1150a2afb611SJerry Jelinek * We validate the snapshot names in the third loop and only report 1151a2afb611SJerry Jelinek * name errors once. 1152a2afb611SJerry Jelinek */ 1153a2afb611SJerry Jelinek if (dmu_tx_is_syncing(tx)) { 1154a2afb611SJerry Jelinek nvlist_t *cnt_track = NULL; 1155a2afb611SJerry Jelinek cnt_track = fnvlist_alloc(); 1156a2afb611SJerry Jelinek 1157a2afb611SJerry Jelinek /* Rollup aggregated counts into the cnt_track list */ 1158a2afb611SJerry Jelinek for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 1159a2afb611SJerry Jelinek pair != NULL; 1160a2afb611SJerry Jelinek pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 1161a2afb611SJerry Jelinek char *pdelim; 1162a2afb611SJerry Jelinek uint64_t val; 1163a2afb611SJerry Jelinek char nm[MAXPATHLEN]; 1164a2afb611SJerry Jelinek 1165a2afb611SJerry Jelinek (void) strlcpy(nm, nvpair_name(pair), sizeof (nm)); 1166a2afb611SJerry Jelinek pdelim = strchr(nm, '@'); 1167a2afb611SJerry Jelinek if (pdelim == NULL) 1168a2afb611SJerry Jelinek continue; 1169a2afb611SJerry Jelinek *pdelim = '\0'; 1170a2afb611SJerry Jelinek 1171a2afb611SJerry Jelinek do { 1172a2afb611SJerry Jelinek if (nvlist_lookup_uint64(cnt_track, nm, 1173a2afb611SJerry Jelinek &val) == 0) { 1174a2afb611SJerry Jelinek /* update existing entry */ 1175a2afb611SJerry Jelinek fnvlist_add_uint64(cnt_track, nm, 1176a2afb611SJerry Jelinek val + 1); 1177a2afb611SJerry Jelinek } else { 1178a2afb611SJerry Jelinek /* add to list */ 1179a2afb611SJerry Jelinek fnvlist_add_uint64(cnt_track, nm, 1); 1180a2afb611SJerry Jelinek } 1181a2afb611SJerry Jelinek 1182a2afb611SJerry Jelinek pdelim = strrchr(nm, '/'); 1183a2afb611SJerry Jelinek if (pdelim != NULL) 1184a2afb611SJerry Jelinek *pdelim = '\0'; 1185a2afb611SJerry Jelinek } while (pdelim != NULL); 1186a2afb611SJerry Jelinek } 1187a2afb611SJerry Jelinek 1188a2afb611SJerry Jelinek /* Check aggregated counts at each level */ 1189a2afb611SJerry Jelinek for (pair = nvlist_next_nvpair(cnt_track, NULL); 1190a2afb611SJerry Jelinek pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { 1191a2afb611SJerry Jelinek int error = 0; 1192a2afb611SJerry Jelinek char *name; 1193a2afb611SJerry Jelinek uint64_t cnt = 0; 1194a2afb611SJerry Jelinek dsl_dataset_t *ds; 1195a2afb611SJerry Jelinek 1196a2afb611SJerry Jelinek name = nvpair_name(pair); 1197a2afb611SJerry Jelinek cnt = fnvpair_value_uint64(pair); 1198a2afb611SJerry Jelinek ASSERT(cnt > 0); 1199a2afb611SJerry Jelinek 1200a2afb611SJerry Jelinek error = dsl_dataset_hold(dp, name, FTAG, &ds); 1201a2afb611SJerry Jelinek if (error == 0) { 1202a2afb611SJerry Jelinek error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, 1203a2afb611SJerry Jelinek ZFS_PROP_SNAPSHOT_LIMIT, NULL, 1204a2afb611SJerry Jelinek ddsa->ddsa_cr); 1205a2afb611SJerry Jelinek dsl_dataset_rele(ds, FTAG); 1206a2afb611SJerry Jelinek } 1207a2afb611SJerry Jelinek 1208a2afb611SJerry Jelinek if (error != 0) { 1209a2afb611SJerry Jelinek if (ddsa->ddsa_errors != NULL) 1210a2afb611SJerry Jelinek fnvlist_add_int32(ddsa->ddsa_errors, 1211a2afb611SJerry Jelinek name, error); 1212a2afb611SJerry Jelinek rv = error; 1213a2afb611SJerry Jelinek /* only report one error for this check */ 1214a2afb611SJerry Jelinek break; 1215a2afb611SJerry Jelinek } 1216a2afb611SJerry Jelinek } 1217a2afb611SJerry Jelinek nvlist_free(cnt_track); 1218a2afb611SJerry Jelinek } 1219a2afb611SJerry Jelinek 12203b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 12213b2aab18SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 12223b2aab18SMatthew Ahrens int error = 0; 12233b2aab18SMatthew Ahrens dsl_dataset_t *ds; 12243b2aab18SMatthew Ahrens char *name, *atp; 12253b2aab18SMatthew Ahrens char dsname[MAXNAMELEN]; 12263b2aab18SMatthew Ahrens 12273b2aab18SMatthew Ahrens name = nvpair_name(pair); 12283b2aab18SMatthew Ahrens if (strlen(name) >= MAXNAMELEN) 1229be6fd75aSMatthew Ahrens error = SET_ERROR(ENAMETOOLONG); 12303b2aab18SMatthew Ahrens if (error == 0) { 12313b2aab18SMatthew Ahrens atp = strchr(name, '@'); 12323b2aab18SMatthew Ahrens if (atp == NULL) 1233be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 12343b2aab18SMatthew Ahrens if (error == 0) 12353b2aab18SMatthew Ahrens (void) strlcpy(dsname, name, atp - name + 1); 12363b2aab18SMatthew Ahrens } 12373b2aab18SMatthew Ahrens if (error == 0) 12383b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, dsname, FTAG, &ds); 12393b2aab18SMatthew Ahrens if (error == 0) { 1240a2afb611SJerry Jelinek /* passing 0/NULL skips dsl_fs_ss_limit_check */ 12413b2aab18SMatthew Ahrens error = dsl_dataset_snapshot_check_impl(ds, 1242a2afb611SJerry Jelinek atp + 1, tx, B_FALSE, 0, NULL); 12433b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 12443b2aab18SMatthew Ahrens } 1245745cd3c5Smaybee 12463b2aab18SMatthew Ahrens if (error != 0) { 12473b2aab18SMatthew Ahrens if (ddsa->ddsa_errors != NULL) { 12483b2aab18SMatthew Ahrens fnvlist_add_int32(ddsa->ddsa_errors, 12493b2aab18SMatthew Ahrens name, error); 12503b2aab18SMatthew Ahrens } 12513b2aab18SMatthew Ahrens rv = error; 12523b2aab18SMatthew Ahrens } 12533b2aab18SMatthew Ahrens } 1254a2afb611SJerry Jelinek 12553b2aab18SMatthew Ahrens return (rv); 1256745cd3c5Smaybee } 1257745cd3c5Smaybee 12583b2aab18SMatthew Ahrens void 12593b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, 12603b2aab18SMatthew Ahrens dmu_tx_t *tx) 1261745cd3c5Smaybee { 12623b2aab18SMatthew Ahrens static zil_header_t zero_zil; 1263745cd3c5Smaybee 12643b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 12653b2aab18SMatthew Ahrens dmu_buf_t *dbuf; 12663b2aab18SMatthew Ahrens dsl_dataset_phys_t *dsphys; 12673b2aab18SMatthew Ahrens uint64_t dsobj, crtxg; 12683b2aab18SMatthew Ahrens objset_t *mos = dp->dp_meta_objset; 12693b2aab18SMatthew Ahrens objset_t *os; 1270745cd3c5Smaybee 12713b2aab18SMatthew Ahrens ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); 1272c33e334fSMatthew Ahrens 1273c33e334fSMatthew Ahrens /* 12743b2aab18SMatthew Ahrens * If we are on an old pool, the zil must not be active, in which 12753b2aab18SMatthew Ahrens * case it will be zeroed. Usually zil_suspend() accomplishes this. 1276c33e334fSMatthew Ahrens */ 12773b2aab18SMatthew Ahrens ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || 12783b2aab18SMatthew Ahrens dmu_objset_from_ds(ds, &os) != 0 || 12793b2aab18SMatthew Ahrens bcmp(&os->os_phys->os_zil_header, &zero_zil, 12803b2aab18SMatthew Ahrens sizeof (zero_zil)) == 0); 1281c33e334fSMatthew Ahrens 1282a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); 1283cde58dbcSMatthew Ahrens 1284cde58dbcSMatthew Ahrens /* 12853b2aab18SMatthew Ahrens * The origin's ds_creation_txg has to be < TXG_INITIAL 1286088f3894Sahrens */ 1287088f3894Sahrens if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) 1288088f3894Sahrens crtxg = 1; 1289088f3894Sahrens else 1290088f3894Sahrens crtxg = tx->tx_txg; 1291088f3894Sahrens 12921649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 12931649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 12943b2aab18SMatthew Ahrens VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 1295fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 1296fa9e4066Sahrens dsphys = dbuf->db_data; 1297745cd3c5Smaybee bzero(dsphys, sizeof (dsl_dataset_phys_t)); 12981d452cf5Sahrens dsphys->ds_dir_obj = ds->ds_dir->dd_object; 1299fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 1300fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 1301fa9e4066Sahrens sizeof (dsphys->ds_guid)); 1302c1379625SJustin T. Gibbs dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 1303c1379625SJustin T. Gibbs dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; 1304fa9e4066Sahrens dsphys->ds_next_snap_obj = ds->ds_object; 1305fa9e4066Sahrens dsphys->ds_num_children = 1; 1306fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 1307088f3894Sahrens dsphys->ds_creation_txg = crtxg; 1308c1379625SJustin T. Gibbs dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; 1309c1379625SJustin T. Gibbs dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; 1310c1379625SJustin T. Gibbs dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; 1311c1379625SJustin T. Gibbs dsphys->ds_uncompressed_bytes = 1312c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes; 1313c1379625SJustin T. Gibbs dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; 1314c1379625SJustin T. Gibbs dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; 1315ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 1316fa9e4066Sahrens 1317ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 1318ca0cc391SMatthew Ahrens if (ds->ds_feature_inuse[f]) 1319ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(dsobj, f, tx); 1320ca0cc391SMatthew Ahrens } 1321b5152584SMatthew Ahrens 1322c1379625SJustin T. Gibbs ASSERT3U(ds->ds_prev != 0, ==, 1323c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); 13241d452cf5Sahrens if (ds->ds_prev) { 1325088f3894Sahrens uint64_t next_clones_obj = 1326c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; 1327c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 1328fa9e4066Sahrens ds->ds_object || 1329c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); 1330c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 1331c1379625SJustin T. Gibbs ds->ds_object) { 13321d452cf5Sahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 1333c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, 1334c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); 1335c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; 1336088f3894Sahrens } else if (next_clones_obj != 0) { 13373b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(ds->ds_prev, 1338c33e334fSMatthew Ahrens dsphys->ds_next_snap_obj, tx); 13393b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 1340088f3894Sahrens next_clones_obj, dsobj, tx)); 1341fa9e4066Sahrens } 1342fa9e4066Sahrens } 1343fa9e4066Sahrens 1344a9799022Sck /* 1345a9799022Sck * If we have a reference-reservation on this dataset, we will 1346a9799022Sck * need to increase the amount of refreservation being charged 1347a9799022Sck * since our unique space is going to zero. 1348a9799022Sck */ 1349a9799022Sck if (ds->ds_reserved) { 13503f9d6ad7SLin Ling int64_t delta; 13513f9d6ad7SLin Ling ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); 1352c1379625SJustin T. Gibbs delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, 1353c1379625SJustin T. Gibbs ds->ds_reserved); 135474e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, 13553f9d6ad7SLin Ling delta, 0, 0, tx); 1356a9799022Sck } 1357a9799022Sck 1358fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1359c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_deadlist_obj = 1360c1379625SJustin T. Gibbs dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, 1361c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); 1362cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 1363c1379625SJustin T. Gibbs dsl_deadlist_open(&ds->ds_deadlist, mos, 1364c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_deadlist_obj); 1365cde58dbcSMatthew Ahrens dsl_deadlist_add_key(&ds->ds_deadlist, 1366c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); 1367cde58dbcSMatthew Ahrens 1368c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); 1369c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; 1370c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; 1371c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes = 0; 1372a9799022Sck if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) 1373c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 1374fa9e4066Sahrens 1375c1379625SJustin T. Gibbs VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, 13763b2aab18SMatthew Ahrens snapname, 8, 1, &dsobj, tx)); 1377fa9e4066Sahrens 1378fa9e4066Sahrens if (ds->ds_prev) 13793b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 13803b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 1381c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); 1382ecd6cf80Smarks 13833f9d6ad7SLin Ling dsl_scan_ds_snapshotted(ds, tx); 1384088f3894Sahrens 138571eb0538SChris Kirby dsl_dir_snap_cmtime_update(ds->ds_dir); 138671eb0538SChris Kirby 13874445fffbSMatthew Ahrens spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, ""); 1388fa9e4066Sahrens } 1389fa9e4066Sahrens 13903b2aab18SMatthew Ahrens static void 13913b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) 1392fa9e4066Sahrens { 13933b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t *ddsa = arg; 13943b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 13953b2aab18SMatthew Ahrens nvpair_t *pair; 139691ebeef5Sahrens 13973b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 13983b2aab18SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 13993b2aab18SMatthew Ahrens dsl_dataset_t *ds; 14003b2aab18SMatthew Ahrens char *name, *atp; 14013b2aab18SMatthew Ahrens char dsname[MAXNAMELEN]; 14023b2aab18SMatthew Ahrens 14033b2aab18SMatthew Ahrens name = nvpair_name(pair); 14043b2aab18SMatthew Ahrens atp = strchr(name, '@'); 14053b2aab18SMatthew Ahrens (void) strlcpy(dsname, name, atp - name + 1); 14063b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); 14073b2aab18SMatthew Ahrens 14083b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); 14093b2aab18SMatthew Ahrens if (ddsa->ddsa_props != NULL) { 14103b2aab18SMatthew Ahrens dsl_props_set_sync_impl(ds->ds_prev, 14113b2aab18SMatthew Ahrens ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); 14123b2aab18SMatthew Ahrens } 14133b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 14143b2aab18SMatthew Ahrens } 1415fa9e4066Sahrens } 1416fa9e4066Sahrens 14173b2aab18SMatthew Ahrens /* 14183b2aab18SMatthew Ahrens * The snapshots must all be in the same pool. 14193b2aab18SMatthew Ahrens * All-or-nothing: if there are any failures, nothing will be modified. 14203b2aab18SMatthew Ahrens */ 14213b2aab18SMatthew Ahrens int 14223b2aab18SMatthew Ahrens dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) 142319b94df9SMatthew Ahrens { 14243b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t ddsa; 14253b2aab18SMatthew Ahrens nvpair_t *pair; 14263b2aab18SMatthew Ahrens boolean_t needsuspend; 14273b2aab18SMatthew Ahrens int error; 14283b2aab18SMatthew Ahrens spa_t *spa; 14293b2aab18SMatthew Ahrens char *firstname; 14303b2aab18SMatthew Ahrens nvlist_t *suspended = NULL; 143119b94df9SMatthew Ahrens 14323b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(snaps, NULL); 14333b2aab18SMatthew Ahrens if (pair == NULL) 14343b2aab18SMatthew Ahrens return (0); 14353b2aab18SMatthew Ahrens firstname = nvpair_name(pair); 14363b2aab18SMatthew Ahrens 14373b2aab18SMatthew Ahrens error = spa_open(firstname, &spa, FTAG); 14383b2aab18SMatthew Ahrens if (error != 0) 14393b2aab18SMatthew Ahrens return (error); 14403b2aab18SMatthew Ahrens needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); 14413b2aab18SMatthew Ahrens spa_close(spa, FTAG); 14423b2aab18SMatthew Ahrens 14433b2aab18SMatthew Ahrens if (needsuspend) { 14443b2aab18SMatthew Ahrens suspended = fnvlist_alloc(); 14453b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 14463b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(snaps, pair)) { 14473b2aab18SMatthew Ahrens char fsname[MAXNAMELEN]; 14483b2aab18SMatthew Ahrens char *snapname = nvpair_name(pair); 14493b2aab18SMatthew Ahrens char *atp; 14503b2aab18SMatthew Ahrens void *cookie; 14513b2aab18SMatthew Ahrens 14523b2aab18SMatthew Ahrens atp = strchr(snapname, '@'); 14533b2aab18SMatthew Ahrens if (atp == NULL) { 1454be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 14553b2aab18SMatthew Ahrens break; 14563b2aab18SMatthew Ahrens } 14573b2aab18SMatthew Ahrens (void) strlcpy(fsname, snapname, atp - snapname + 1); 14583b2aab18SMatthew Ahrens 14593b2aab18SMatthew Ahrens error = zil_suspend(fsname, &cookie); 14603b2aab18SMatthew Ahrens if (error != 0) 14613b2aab18SMatthew Ahrens break; 14623b2aab18SMatthew Ahrens fnvlist_add_uint64(suspended, fsname, 14633b2aab18SMatthew Ahrens (uintptr_t)cookie); 14643b2aab18SMatthew Ahrens } 14653b2aab18SMatthew Ahrens } 14663b2aab18SMatthew Ahrens 14673b2aab18SMatthew Ahrens ddsa.ddsa_snaps = snaps; 14683b2aab18SMatthew Ahrens ddsa.ddsa_props = props; 14693b2aab18SMatthew Ahrens ddsa.ddsa_errors = errors; 1470a2afb611SJerry Jelinek ddsa.ddsa_cr = CRED(); 14713b2aab18SMatthew Ahrens 14723b2aab18SMatthew Ahrens if (error == 0) { 14733b2aab18SMatthew Ahrens error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, 14743b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync, &ddsa, 14757d46dc6cSMatthew Ahrens fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); 14763b2aab18SMatthew Ahrens } 14773b2aab18SMatthew Ahrens 14783b2aab18SMatthew Ahrens if (suspended != NULL) { 14793b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; 14803b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(suspended, pair)) { 14813b2aab18SMatthew Ahrens zil_resume((void *)(uintptr_t) 14823b2aab18SMatthew Ahrens fnvpair_value_uint64(pair)); 14833b2aab18SMatthew Ahrens } 14843b2aab18SMatthew Ahrens fnvlist_free(suspended); 14853b2aab18SMatthew Ahrens } 14863b2aab18SMatthew Ahrens 14873b2aab18SMatthew Ahrens return (error); 14883b2aab18SMatthew Ahrens } 14893b2aab18SMatthew Ahrens 14903b2aab18SMatthew Ahrens typedef struct dsl_dataset_snapshot_tmp_arg { 14913b2aab18SMatthew Ahrens const char *ddsta_fsname; 14923b2aab18SMatthew Ahrens const char *ddsta_snapname; 14933b2aab18SMatthew Ahrens minor_t ddsta_cleanup_minor; 14943b2aab18SMatthew Ahrens const char *ddsta_htag; 14953b2aab18SMatthew Ahrens } dsl_dataset_snapshot_tmp_arg_t; 14963b2aab18SMatthew Ahrens 14973b2aab18SMatthew Ahrens static int 14983b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) 14993b2aab18SMatthew Ahrens { 15003b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; 15013b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 15023b2aab18SMatthew Ahrens dsl_dataset_t *ds; 15033b2aab18SMatthew Ahrens int error; 15043b2aab18SMatthew Ahrens 15053b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); 15063b2aab18SMatthew Ahrens if (error != 0) 15073b2aab18SMatthew Ahrens return (error); 15083b2aab18SMatthew Ahrens 1509a2afb611SJerry Jelinek /* NULL cred means no limit check for tmp snapshot */ 1510ca48f36fSKeith M Wesolowski error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, 1511a2afb611SJerry Jelinek tx, B_FALSE, 0, NULL); 15123b2aab18SMatthew Ahrens if (error != 0) { 15133b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 15143b2aab18SMatthew Ahrens return (error); 15153b2aab18SMatthew Ahrens } 15163b2aab18SMatthew Ahrens 15173b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { 15183b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 1519be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 15203b2aab18SMatthew Ahrens } 15213b2aab18SMatthew Ahrens error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, 15223b2aab18SMatthew Ahrens B_TRUE, tx); 15233b2aab18SMatthew Ahrens if (error != 0) { 15243b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 15253b2aab18SMatthew Ahrens return (error); 15263b2aab18SMatthew Ahrens } 15273b2aab18SMatthew Ahrens 15283b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 15293b2aab18SMatthew Ahrens return (0); 15303b2aab18SMatthew Ahrens } 15313b2aab18SMatthew Ahrens 15323b2aab18SMatthew Ahrens static void 15333b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) 15343b2aab18SMatthew Ahrens { 15353b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; 15363b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 15373b2aab18SMatthew Ahrens dsl_dataset_t *ds; 15383b2aab18SMatthew Ahrens 15393b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); 15403b2aab18SMatthew Ahrens 15413b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); 15423b2aab18SMatthew Ahrens dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, 15433b2aab18SMatthew Ahrens ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); 15443b2aab18SMatthew Ahrens dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); 15453b2aab18SMatthew Ahrens 15463b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 15473b2aab18SMatthew Ahrens } 15483b2aab18SMatthew Ahrens 15493b2aab18SMatthew Ahrens int 15503b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, 15513b2aab18SMatthew Ahrens minor_t cleanup_minor, const char *htag) 15523b2aab18SMatthew Ahrens { 15533b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t ddsta; 15543b2aab18SMatthew Ahrens int error; 15553b2aab18SMatthew Ahrens spa_t *spa; 15563b2aab18SMatthew Ahrens boolean_t needsuspend; 15573b2aab18SMatthew Ahrens void *cookie; 15583b2aab18SMatthew Ahrens 15593b2aab18SMatthew Ahrens ddsta.ddsta_fsname = fsname; 15603b2aab18SMatthew Ahrens ddsta.ddsta_snapname = snapname; 15613b2aab18SMatthew Ahrens ddsta.ddsta_cleanup_minor = cleanup_minor; 15623b2aab18SMatthew Ahrens ddsta.ddsta_htag = htag; 15633b2aab18SMatthew Ahrens 15643b2aab18SMatthew Ahrens error = spa_open(fsname, &spa, FTAG); 15653b2aab18SMatthew Ahrens if (error != 0) 15663b2aab18SMatthew Ahrens return (error); 15673b2aab18SMatthew Ahrens needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); 15683b2aab18SMatthew Ahrens spa_close(spa, FTAG); 15693b2aab18SMatthew Ahrens 15703b2aab18SMatthew Ahrens if (needsuspend) { 15713b2aab18SMatthew Ahrens error = zil_suspend(fsname, &cookie); 15723b2aab18SMatthew Ahrens if (error != 0) 15733b2aab18SMatthew Ahrens return (error); 15743b2aab18SMatthew Ahrens } 15753b2aab18SMatthew Ahrens 15763b2aab18SMatthew Ahrens error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, 15777d46dc6cSMatthew Ahrens dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); 15783b2aab18SMatthew Ahrens 15793b2aab18SMatthew Ahrens if (needsuspend) 15803b2aab18SMatthew Ahrens zil_resume(cookie); 15813b2aab18SMatthew Ahrens return (error); 15823b2aab18SMatthew Ahrens } 15833b2aab18SMatthew Ahrens 15843b2aab18SMatthew Ahrens 15853b2aab18SMatthew Ahrens void 15863b2aab18SMatthew Ahrens dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) 15873b2aab18SMatthew Ahrens { 15883b2aab18SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 15893b2aab18SMatthew Ahrens ASSERT(ds->ds_objset != NULL); 1590c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); 15913b2aab18SMatthew Ahrens 15923b2aab18SMatthew Ahrens /* 15933b2aab18SMatthew Ahrens * in case we had to change ds_fsid_guid when we opened it, 15943b2aab18SMatthew Ahrens * sync it out now. 15953b2aab18SMatthew Ahrens */ 15963b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1597c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; 15983b2aab18SMatthew Ahrens 15993b2aab18SMatthew Ahrens dmu_objset_sync(ds->ds_objset, zio, tx); 1600b5152584SMatthew Ahrens 1601ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 1602ca0cc391SMatthew Ahrens if (ds->ds_feature_activation_needed[f]) { 1603ca0cc391SMatthew Ahrens if (ds->ds_feature_inuse[f]) 1604ca0cc391SMatthew Ahrens continue; 1605ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(ds->ds_object, f, tx); 1606ca0cc391SMatthew Ahrens ds->ds_feature_inuse[f] = B_TRUE; 1607ca0cc391SMatthew Ahrens } 1608b5152584SMatthew Ahrens } 16093b2aab18SMatthew Ahrens } 16103b2aab18SMatthew Ahrens 16113b2aab18SMatthew Ahrens static void 16123b2aab18SMatthew Ahrens get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) 16133b2aab18SMatthew Ahrens { 16143b2aab18SMatthew Ahrens uint64_t count = 0; 16153b2aab18SMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 16163b2aab18SMatthew Ahrens zap_cursor_t zc; 16173b2aab18SMatthew Ahrens zap_attribute_t za; 16183b2aab18SMatthew Ahrens nvlist_t *propval = fnvlist_alloc(); 16193b2aab18SMatthew Ahrens nvlist_t *val = fnvlist_alloc(); 16203b2aab18SMatthew Ahrens 16213b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 162219b94df9SMatthew Ahrens 162319b94df9SMatthew Ahrens /* 16243b2aab18SMatthew Ahrens * There may be missing entries in ds_next_clones_obj 162519b94df9SMatthew Ahrens * due to a bug in a previous version of the code. 162619b94df9SMatthew Ahrens * Only trust it if it has the right number of entries. 162719b94df9SMatthew Ahrens */ 1628c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { 1629c1379625SJustin T. Gibbs VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 163019b94df9SMatthew Ahrens &count)); 163119b94df9SMatthew Ahrens } 1632c1379625SJustin T. Gibbs if (count != dsl_dataset_phys(ds)->ds_num_children - 1) 163319b94df9SMatthew Ahrens goto fail; 1634c1379625SJustin T. Gibbs for (zap_cursor_init(&zc, mos, 1635c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_next_clones_obj); 163619b94df9SMatthew Ahrens zap_cursor_retrieve(&zc, &za) == 0; 163719b94df9SMatthew Ahrens zap_cursor_advance(&zc)) { 163819b94df9SMatthew Ahrens dsl_dataset_t *clone; 163919b94df9SMatthew Ahrens char buf[ZFS_MAXNAMELEN]; 16403b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, 16413b2aab18SMatthew Ahrens za.za_first_integer, FTAG, &clone)); 164219b94df9SMatthew Ahrens dsl_dir_name(clone->ds_dir, buf); 16433b2aab18SMatthew Ahrens fnvlist_add_boolean(val, buf); 164419b94df9SMatthew Ahrens dsl_dataset_rele(clone, FTAG); 164519b94df9SMatthew Ahrens } 164619b94df9SMatthew Ahrens zap_cursor_fini(&zc); 16473b2aab18SMatthew Ahrens fnvlist_add_nvlist(propval, ZPROP_VALUE, val); 16483b2aab18SMatthew Ahrens fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), propval); 164919b94df9SMatthew Ahrens fail: 165019b94df9SMatthew Ahrens nvlist_free(val); 165119b94df9SMatthew Ahrens nvlist_free(propval); 165219b94df9SMatthew Ahrens } 165319b94df9SMatthew Ahrens 1654fa9e4066Sahrens void 1655a2eea2e1Sahrens dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) 1656fa9e4066Sahrens { 16573b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 1658187d6ac0SMatt Ahrens uint64_t refd, avail, uobjs, aobjs, ratio; 1659a9799022Sck 16603b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 16613b2aab18SMatthew Ahrens 1662c1379625SJustin T. Gibbs ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : 1663c1379625SJustin T. Gibbs (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / 1664c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_compressed_bytes); 16654445fffbSMatthew Ahrens 16664445fffbSMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, ratio); 166777372cb0SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, 1668c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes); 16694445fffbSMatthew Ahrens 1670bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 16714445fffbSMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, ratio); 16724445fffbSMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, 1673c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes); 16744445fffbSMatthew Ahrens get_clones_stat(ds, nv); 16754445fffbSMatthew Ahrens } else { 1676b461c746SMatthew Ahrens if (ds->ds_prev != NULL && ds->ds_prev != dp->dp_origin_snap) { 1677b461c746SMatthew Ahrens char buf[MAXNAMELEN]; 1678b461c746SMatthew Ahrens dsl_dataset_name(ds->ds_prev, buf); 1679b461c746SMatthew Ahrens dsl_prop_nvlist_add_string(nv, ZFS_PROP_PREV_SNAP, buf); 1680b461c746SMatthew Ahrens } 1681b461c746SMatthew Ahrens 16824445fffbSMatthew Ahrens dsl_dir_stats(ds->ds_dir, nv); 16834445fffbSMatthew Ahrens } 1684fa9e4066Sahrens 1685a9799022Sck dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); 1686a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); 1687a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); 1688a9799022Sck 1689a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, 1690c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_creation_time); 1691a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, 1692c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_creation_txg); 1693a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, 1694a9799022Sck ds->ds_quota); 1695a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, 1696a9799022Sck ds->ds_reserved); 1697c5904d13Seschrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, 1698c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_guid); 16991d713200SEric Schrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, 1700c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes); 17011d713200SEric Schrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, 17021d713200SEric Schrock ds->ds_object); 170392241e0bSTom Erickson dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, 170492241e0bSTom Erickson ds->ds_userrefs); 1705842727c2SChris Kirby dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, 1706842727c2SChris Kirby DS_IS_DEFER_DESTROY(ds) ? 1 : 0); 1707fa9e4066Sahrens 1708c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { 170919b94df9SMatthew Ahrens uint64_t written, comp, uncomp; 171019b94df9SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 171119b94df9SMatthew Ahrens dsl_dataset_t *prev; 171219b94df9SMatthew Ahrens 171319b94df9SMatthew Ahrens int err = dsl_dataset_hold_obj(dp, 1714c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); 171519b94df9SMatthew Ahrens if (err == 0) { 171619b94df9SMatthew Ahrens err = dsl_dataset_space_written(prev, ds, &written, 171719b94df9SMatthew Ahrens &comp, &uncomp); 171819b94df9SMatthew Ahrens dsl_dataset_rele(prev, FTAG); 171919b94df9SMatthew Ahrens if (err == 0) { 172019b94df9SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, 172119b94df9SMatthew Ahrens written); 172219b94df9SMatthew Ahrens } 172319b94df9SMatthew Ahrens } 172419b94df9SMatthew Ahrens } 1725fa9e4066Sahrens } 1726fa9e4066Sahrens 1727a2eea2e1Sahrens void 1728a2eea2e1Sahrens dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) 1729a2eea2e1Sahrens { 17303b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 17313b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 17323b2aab18SMatthew Ahrens 1733c1379625SJustin T. Gibbs stat->dds_creation_txg = dsl_dataset_phys(ds)->ds_creation_txg; 1734c1379625SJustin T. Gibbs stat->dds_inconsistent = 1735c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT; 1736c1379625SJustin T. Gibbs stat->dds_guid = dsl_dataset_phys(ds)->ds_guid; 17374445fffbSMatthew Ahrens stat->dds_origin[0] = '\0'; 1738bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 1739a2eea2e1Sahrens stat->dds_is_snapshot = B_TRUE; 1740c1379625SJustin T. Gibbs stat->dds_num_clones = 1741c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_num_children - 1; 1742ebedde84SEric Taylor } else { 1743ebedde84SEric Taylor stat->dds_is_snapshot = B_FALSE; 1744ebedde84SEric Taylor stat->dds_num_clones = 0; 1745a2eea2e1Sahrens 17464445fffbSMatthew Ahrens if (dsl_dir_is_clone(ds->ds_dir)) { 17474445fffbSMatthew Ahrens dsl_dataset_t *ods; 1748a2eea2e1Sahrens 17493b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 1750c1379625SJustin T. Gibbs dsl_dir_phys(ds->ds_dir)->dd_origin_obj, 1751c1379625SJustin T. Gibbs FTAG, &ods)); 17524445fffbSMatthew Ahrens dsl_dataset_name(ods, stat->dds_origin); 17533b2aab18SMatthew Ahrens dsl_dataset_rele(ods, FTAG); 17544445fffbSMatthew Ahrens } 1755a2eea2e1Sahrens } 1756a2eea2e1Sahrens } 1757a2eea2e1Sahrens 1758a2eea2e1Sahrens uint64_t 1759a2eea2e1Sahrens dsl_dataset_fsid_guid(dsl_dataset_t *ds) 1760a2eea2e1Sahrens { 176191ebeef5Sahrens return (ds->ds_fsid_guid); 1762a2eea2e1Sahrens } 1763a2eea2e1Sahrens 1764a2eea2e1Sahrens void 1765a2eea2e1Sahrens dsl_dataset_space(dsl_dataset_t *ds, 1766a2eea2e1Sahrens uint64_t *refdbytesp, uint64_t *availbytesp, 1767a2eea2e1Sahrens uint64_t *usedobjsp, uint64_t *availobjsp) 1768fa9e4066Sahrens { 1769c1379625SJustin T. Gibbs *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; 1770a2eea2e1Sahrens *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); 1771c1379625SJustin T. Gibbs if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) 1772c1379625SJustin T. Gibbs *availbytesp += 1773c1379625SJustin T. Gibbs ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; 1774a9799022Sck if (ds->ds_quota != 0) { 1775a9799022Sck /* 1776a9799022Sck * Adjust available bytes according to refquota 1777a9799022Sck */ 1778a9799022Sck if (*refdbytesp < ds->ds_quota) 1779a9799022Sck *availbytesp = MIN(*availbytesp, 1780a9799022Sck ds->ds_quota - *refdbytesp); 1781a9799022Sck else 1782a9799022Sck *availbytesp = 0; 1783a9799022Sck } 1784c1379625SJustin T. Gibbs *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); 1785a2eea2e1Sahrens *availobjsp = DN_MAX_OBJECT - *usedobjsp; 1786fa9e4066Sahrens } 1787fa9e4066Sahrens 1788f18faf3fSek boolean_t 178934f2f8cfSMatthew Ahrens dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) 1790f18faf3fSek { 1791f18faf3fSek dsl_pool_t *dp = ds->ds_dir->dd_pool; 1792f18faf3fSek 17933b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 179434f2f8cfSMatthew Ahrens if (snap == NULL) 1795f18faf3fSek return (B_FALSE); 1796c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_bp.blk_birth > 1797c1379625SJustin T. Gibbs dsl_dataset_phys(snap)->ds_creation_txg) { 179834f2f8cfSMatthew Ahrens objset_t *os, *os_snap; 17996e0cbcaaSMatthew Ahrens /* 18006e0cbcaaSMatthew Ahrens * It may be that only the ZIL differs, because it was 18016e0cbcaaSMatthew Ahrens * reset in the head. Don't count that as being 18026e0cbcaaSMatthew Ahrens * modified. 18036e0cbcaaSMatthew Ahrens */ 18046e0cbcaaSMatthew Ahrens if (dmu_objset_from_ds(ds, &os) != 0) 18056e0cbcaaSMatthew Ahrens return (B_TRUE); 180634f2f8cfSMatthew Ahrens if (dmu_objset_from_ds(snap, &os_snap) != 0) 18076e0cbcaaSMatthew Ahrens return (B_TRUE); 18086e0cbcaaSMatthew Ahrens return (bcmp(&os->os_phys->os_meta_dnode, 180934f2f8cfSMatthew Ahrens &os_snap->os_phys->os_meta_dnode, 18106e0cbcaaSMatthew Ahrens sizeof (os->os_phys->os_meta_dnode)) != 0); 18116e0cbcaaSMatthew Ahrens } 1812f18faf3fSek return (B_FALSE); 1813f18faf3fSek } 1814f18faf3fSek 18153b2aab18SMatthew Ahrens typedef struct dsl_dataset_rename_snapshot_arg { 18163b2aab18SMatthew Ahrens const char *ddrsa_fsname; 18173b2aab18SMatthew Ahrens const char *ddrsa_oldsnapname; 18183b2aab18SMatthew Ahrens const char *ddrsa_newsnapname; 18193b2aab18SMatthew Ahrens boolean_t ddrsa_recursive; 18203b2aab18SMatthew Ahrens dmu_tx_t *ddrsa_tx; 18213b2aab18SMatthew Ahrens } dsl_dataset_rename_snapshot_arg_t; 18223b2aab18SMatthew Ahrens 18231d452cf5Sahrens /* ARGSUSED */ 1824fa9e4066Sahrens static int 18253b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, 18263b2aab18SMatthew Ahrens dsl_dataset_t *hds, void *arg) 1827fa9e4066Sahrens { 18283b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 18293b2aab18SMatthew Ahrens int error; 1830fa9e4066Sahrens uint64_t val; 1831fa9e4066Sahrens 18323b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); 18333b2aab18SMatthew Ahrens if (error != 0) { 18343b2aab18SMatthew Ahrens /* ignore nonexistent snapshots */ 18353b2aab18SMatthew Ahrens return (error == ENOENT ? 0 : error); 18363b2aab18SMatthew Ahrens } 18371d452cf5Sahrens 18383b2aab18SMatthew Ahrens /* new name should not exist */ 18393b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); 18403b2aab18SMatthew Ahrens if (error == 0) 1841be6fd75aSMatthew Ahrens error = SET_ERROR(EEXIST); 18423b2aab18SMatthew Ahrens else if (error == ENOENT) 18433b2aab18SMatthew Ahrens error = 0; 1844cdf5b4caSmmusante 1845cdf5b4caSmmusante /* dataset name + 1 for the "@" + the new snapshot name must fit */ 18463b2aab18SMatthew Ahrens if (dsl_dir_namelen(hds->ds_dir) + 1 + 18473b2aab18SMatthew Ahrens strlen(ddrsa->ddrsa_newsnapname) >= MAXNAMELEN) 1848be6fd75aSMatthew Ahrens error = SET_ERROR(ENAMETOOLONG); 1849cdf5b4caSmmusante 18503b2aab18SMatthew Ahrens return (error); 18511d452cf5Sahrens } 1852fa9e4066Sahrens 18533b2aab18SMatthew Ahrens static int 18543b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) 18551d452cf5Sahrens { 18563b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 18573b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 18581d452cf5Sahrens dsl_dataset_t *hds; 18593b2aab18SMatthew Ahrens int error; 1860fa9e4066Sahrens 18613b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); 18623b2aab18SMatthew Ahrens if (error != 0) 18633b2aab18SMatthew Ahrens return (error); 1864fa9e4066Sahrens 18653b2aab18SMatthew Ahrens if (ddrsa->ddrsa_recursive) { 18663b2aab18SMatthew Ahrens error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, 18673b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check_impl, ddrsa, 18683b2aab18SMatthew Ahrens DS_FIND_CHILDREN); 18693b2aab18SMatthew Ahrens } else { 18703b2aab18SMatthew Ahrens error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); 18713b2aab18SMatthew Ahrens } 1872745cd3c5Smaybee dsl_dataset_rele(hds, FTAG); 18733b2aab18SMatthew Ahrens return (error); 1874fa9e4066Sahrens } 1875fa9e4066Sahrens 1876cdf5b4caSmmusante static int 18773b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, 18783b2aab18SMatthew Ahrens dsl_dataset_t *hds, void *arg) 1879cdf5b4caSmmusante { 18803b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 18813b2aab18SMatthew Ahrens dsl_dataset_t *ds; 18823b2aab18SMatthew Ahrens uint64_t val; 18833b2aab18SMatthew Ahrens dmu_tx_t *tx = ddrsa->ddrsa_tx; 18843b2aab18SMatthew Ahrens int error; 1885ecd6cf80Smarks 18863b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); 18873b2aab18SMatthew Ahrens ASSERT(error == 0 || error == ENOENT); 18883b2aab18SMatthew Ahrens if (error == ENOENT) { 18893b2aab18SMatthew Ahrens /* ignore nonexistent snapshots */ 18903b2aab18SMatthew Ahrens return (0); 1891ecd6cf80Smarks } 1892ecd6cf80Smarks 18933b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); 18943b2aab18SMatthew Ahrens 18953b2aab18SMatthew Ahrens /* log before we change the name */ 18963b2aab18SMatthew Ahrens spa_history_log_internal_ds(ds, "rename", tx, 18973b2aab18SMatthew Ahrens "-> @%s", ddrsa->ddrsa_newsnapname); 1898cdf5b4caSmmusante 1899a2afb611SJerry Jelinek VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, 1900a2afb611SJerry Jelinek B_FALSE)); 19013b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 19023b2aab18SMatthew Ahrens (void) strcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname); 19033b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 1904c1379625SJustin T. Gibbs VERIFY0(zap_add(dp->dp_meta_objset, 1905c1379625SJustin T. Gibbs dsl_dataset_phys(hds)->ds_snapnames_zapobj, 19063b2aab18SMatthew Ahrens ds->ds_snapname, 8, 1, &ds->ds_object, tx)); 1907cdf5b4caSmmusante 19083b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 1909cdf5b4caSmmusante return (0); 1910cdf5b4caSmmusante } 1911cdf5b4caSmmusante 19123b2aab18SMatthew Ahrens static void 19133b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) 1914cdf5b4caSmmusante { 19153b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 19163b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 19173b2aab18SMatthew Ahrens dsl_dataset_t *hds; 1918cdf5b4caSmmusante 19193b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); 19203b2aab18SMatthew Ahrens ddrsa->ddrsa_tx = tx; 19213b2aab18SMatthew Ahrens if (ddrsa->ddrsa_recursive) { 19223b2aab18SMatthew Ahrens VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, 19233b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync_impl, ddrsa, 19243b2aab18SMatthew Ahrens DS_FIND_CHILDREN)); 19253b2aab18SMatthew Ahrens } else { 19263b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); 1927cdf5b4caSmmusante } 19283b2aab18SMatthew Ahrens dsl_dataset_rele(hds, FTAG); 1929cdf5b4caSmmusante } 1930cdf5b4caSmmusante 19313b2aab18SMatthew Ahrens int 19323b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot(const char *fsname, 19333b2aab18SMatthew Ahrens const char *oldsnapname, const char *newsnapname, boolean_t recursive) 19343a5a36beSmmusante { 19353b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t ddrsa; 19363a5a36beSmmusante 19373b2aab18SMatthew Ahrens ddrsa.ddrsa_fsname = fsname; 19383b2aab18SMatthew Ahrens ddrsa.ddrsa_oldsnapname = oldsnapname; 19393b2aab18SMatthew Ahrens ddrsa.ddrsa_newsnapname = newsnapname; 19403b2aab18SMatthew Ahrens ddrsa.ddrsa_recursive = recursive; 19413a5a36beSmmusante 19423b2aab18SMatthew Ahrens return (dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, 19437d46dc6cSMatthew Ahrens dsl_dataset_rename_snapshot_sync, &ddrsa, 19447d46dc6cSMatthew Ahrens 1, ZFS_SPACE_CHECK_RESERVED)); 19453a5a36beSmmusante } 19463a5a36beSmmusante 194791948b51SKeith M Wesolowski /* 194891948b51SKeith M Wesolowski * If we're doing an ownership handoff, we need to make sure that there is 194991948b51SKeith M Wesolowski * only one long hold on the dataset. We're not allowed to change anything here 195091948b51SKeith M Wesolowski * so we don't permanently release the long hold or regular hold here. We want 195191948b51SKeith M Wesolowski * to do this only when syncing to avoid the dataset unexpectedly going away 195291948b51SKeith M Wesolowski * when we release the long hold. 195391948b51SKeith M Wesolowski */ 195491948b51SKeith M Wesolowski static int 195591948b51SKeith M Wesolowski dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) 195691948b51SKeith M Wesolowski { 195791948b51SKeith M Wesolowski boolean_t held; 195891948b51SKeith M Wesolowski 195991948b51SKeith M Wesolowski if (!dmu_tx_is_syncing(tx)) 196091948b51SKeith M Wesolowski return (0); 196191948b51SKeith M Wesolowski 196291948b51SKeith M Wesolowski if (owner != NULL) { 196391948b51SKeith M Wesolowski VERIFY3P(ds->ds_owner, ==, owner); 196491948b51SKeith M Wesolowski dsl_dataset_long_rele(ds, owner); 196591948b51SKeith M Wesolowski } 196691948b51SKeith M Wesolowski 196791948b51SKeith M Wesolowski held = dsl_dataset_long_held(ds); 196891948b51SKeith M Wesolowski 196991948b51SKeith M Wesolowski if (owner != NULL) 197091948b51SKeith M Wesolowski dsl_dataset_long_hold(ds, owner); 197191948b51SKeith M Wesolowski 197291948b51SKeith M Wesolowski if (held) 197391948b51SKeith M Wesolowski return (SET_ERROR(EBUSY)); 197491948b51SKeith M Wesolowski 197591948b51SKeith M Wesolowski return (0); 197691948b51SKeith M Wesolowski } 197791948b51SKeith M Wesolowski 197891948b51SKeith M Wesolowski typedef struct dsl_dataset_rollback_arg { 197991948b51SKeith M Wesolowski const char *ddra_fsname; 198091948b51SKeith M Wesolowski void *ddra_owner; 1981a7027df1SMatthew Ahrens nvlist_t *ddra_result; 198291948b51SKeith M Wesolowski } dsl_dataset_rollback_arg_t; 198391948b51SKeith M Wesolowski 19843b2aab18SMatthew Ahrens static int 19853b2aab18SMatthew Ahrens dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) 1986fa9e4066Sahrens { 198791948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t *ddra = arg; 19883b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 19891d452cf5Sahrens dsl_dataset_t *ds; 19903b2aab18SMatthew Ahrens int64_t unused_refres_delta; 19913b2aab18SMatthew Ahrens int error; 1992fa9e4066Sahrens 199391948b51SKeith M Wesolowski error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); 19943b2aab18SMatthew Ahrens if (error != 0) 19953b2aab18SMatthew Ahrens return (error); 1996370c1af0SSanjeev Bagewadi 19973b2aab18SMatthew Ahrens /* must not be a snapshot */ 1998bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 19993b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2000be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 20013b2aab18SMatthew Ahrens } 20023a5a36beSmmusante 20033b2aab18SMatthew Ahrens /* must have a most recent snapshot */ 2004c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { 20053b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2006be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 20073b2aab18SMatthew Ahrens } 20083a5a36beSmmusante 200978f17100SMatthew Ahrens /* must not have any bookmarks after the most recent snapshot */ 201078f17100SMatthew Ahrens nvlist_t *proprequest = fnvlist_alloc(); 201178f17100SMatthew Ahrens fnvlist_add_boolean(proprequest, zfs_prop_to_name(ZFS_PROP_CREATETXG)); 201278f17100SMatthew Ahrens nvlist_t *bookmarks = fnvlist_alloc(); 201378f17100SMatthew Ahrens error = dsl_get_bookmarks_impl(ds, proprequest, bookmarks); 201478f17100SMatthew Ahrens fnvlist_free(proprequest); 201578f17100SMatthew Ahrens if (error != 0) 201678f17100SMatthew Ahrens return (error); 201778f17100SMatthew Ahrens for (nvpair_t *pair = nvlist_next_nvpair(bookmarks, NULL); 201878f17100SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(bookmarks, pair)) { 201978f17100SMatthew Ahrens nvlist_t *valuenv = 202078f17100SMatthew Ahrens fnvlist_lookup_nvlist(fnvpair_value_nvlist(pair), 202178f17100SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_CREATETXG)); 202278f17100SMatthew Ahrens uint64_t createtxg = fnvlist_lookup_uint64(valuenv, "value"); 2023c1379625SJustin T. Gibbs if (createtxg > dsl_dataset_phys(ds)->ds_prev_snap_txg) { 202478f17100SMatthew Ahrens fnvlist_free(bookmarks); 202578f17100SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 202678f17100SMatthew Ahrens return (SET_ERROR(EEXIST)); 202778f17100SMatthew Ahrens } 202878f17100SMatthew Ahrens } 202978f17100SMatthew Ahrens fnvlist_free(bookmarks); 203078f17100SMatthew Ahrens 203191948b51SKeith M Wesolowski error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); 203291948b51SKeith M Wesolowski if (error != 0) { 20333b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 203491948b51SKeith M Wesolowski return (error); 20353b2aab18SMatthew Ahrens } 20363b2aab18SMatthew Ahrens 20373b2aab18SMatthew Ahrens /* 20383b2aab18SMatthew Ahrens * Check if the snap we are rolling back to uses more than 20393b2aab18SMatthew Ahrens * the refquota. 20403b2aab18SMatthew Ahrens */ 20413b2aab18SMatthew Ahrens if (ds->ds_quota != 0 && 2042c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { 20433b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2044be6fd75aSMatthew Ahrens return (SET_ERROR(EDQUOT)); 2045fa9e4066Sahrens } 2046370c1af0SSanjeev Bagewadi 20473b2aab18SMatthew Ahrens /* 20483b2aab18SMatthew Ahrens * When we do the clone swap, we will temporarily use more space 20493b2aab18SMatthew Ahrens * due to the refreservation (the head will no longer have any 20503b2aab18SMatthew Ahrens * unique space, so the entire amount of the refreservation will need 20513b2aab18SMatthew Ahrens * to be free). We will immediately destroy the clone, freeing 20523b2aab18SMatthew Ahrens * this space, but the freeing happens over many txg's. 20533b2aab18SMatthew Ahrens */ 20543b2aab18SMatthew Ahrens unused_refres_delta = (int64_t)MIN(ds->ds_reserved, 2055c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes); 20563b2aab18SMatthew Ahrens 20573b2aab18SMatthew Ahrens if (unused_refres_delta > 0 && 20583b2aab18SMatthew Ahrens unused_refres_delta > 20593b2aab18SMatthew Ahrens dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { 20603b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2061be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 2062fa9e4066Sahrens } 2063fa9e4066Sahrens 20643b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 20653b2aab18SMatthew Ahrens return (0); 20663b2aab18SMatthew Ahrens } 20671d452cf5Sahrens 20683b2aab18SMatthew Ahrens static void 20693b2aab18SMatthew Ahrens dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) 20703b2aab18SMatthew Ahrens { 207191948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t *ddra = arg; 20723b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 20733b2aab18SMatthew Ahrens dsl_dataset_t *ds, *clone; 20743b2aab18SMatthew Ahrens uint64_t cloneobj; 2075a7027df1SMatthew Ahrens char namebuf[ZFS_MAXNAMELEN]; 20761d452cf5Sahrens 207791948b51SKeith M Wesolowski VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); 20781d452cf5Sahrens 2079a7027df1SMatthew Ahrens dsl_dataset_name(ds->ds_prev, namebuf); 2080a7027df1SMatthew Ahrens fnvlist_add_string(ddra->ddra_result, "target", namebuf); 2081a7027df1SMatthew Ahrens 20823b2aab18SMatthew Ahrens cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", 20833b2aab18SMatthew Ahrens ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, tx); 20841d452cf5Sahrens 20853b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); 20861d452cf5Sahrens 20873b2aab18SMatthew Ahrens dsl_dataset_clone_swap_sync_impl(clone, ds, tx); 20883b2aab18SMatthew Ahrens dsl_dataset_zero_zil(ds, tx); 20893b2aab18SMatthew Ahrens 20903b2aab18SMatthew Ahrens dsl_destroy_head_sync_impl(clone, tx); 20913b2aab18SMatthew Ahrens 20923b2aab18SMatthew Ahrens dsl_dataset_rele(clone, FTAG); 20933b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 20943b2aab18SMatthew Ahrens } 20953b2aab18SMatthew Ahrens 209691948b51SKeith M Wesolowski /* 2097a7027df1SMatthew Ahrens * Rolls back the given filesystem or volume to the most recent snapshot. 2098a7027df1SMatthew Ahrens * The name of the most recent snapshot will be returned under key "target" 2099a7027df1SMatthew Ahrens * in the result nvlist. 210091948b51SKeith M Wesolowski * 2101a7027df1SMatthew Ahrens * If owner != NULL: 210291948b51SKeith M Wesolowski * - The existing dataset MUST be owned by the specified owner at entry 210391948b51SKeith M Wesolowski * - Upon return, dataset will still be held by the same owner, whether we 210491948b51SKeith M Wesolowski * succeed or not. 210591948b51SKeith M Wesolowski * 210691948b51SKeith M Wesolowski * This mode is required any time the existing filesystem is mounted. See 210791948b51SKeith M Wesolowski * notes above zfs_suspend_fs() for further details. 210891948b51SKeith M Wesolowski */ 21093b2aab18SMatthew Ahrens int 2110a7027df1SMatthew Ahrens dsl_dataset_rollback(const char *fsname, void *owner, nvlist_t *result) 21113b2aab18SMatthew Ahrens { 211291948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t ddra; 211391948b51SKeith M Wesolowski 211491948b51SKeith M Wesolowski ddra.ddra_fsname = fsname; 211591948b51SKeith M Wesolowski ddra.ddra_owner = owner; 2116a7027df1SMatthew Ahrens ddra.ddra_result = result; 211791948b51SKeith M Wesolowski 21183b2aab18SMatthew Ahrens return (dsl_sync_task(fsname, dsl_dataset_rollback_check, 21197d46dc6cSMatthew Ahrens dsl_dataset_rollback_sync, &ddra, 21207d46dc6cSMatthew Ahrens 1, ZFS_SPACE_CHECK_RESERVED)); 2121fa9e4066Sahrens } 212299653d4eSeschrock 2123088f3894Sahrens struct promotenode { 2124745cd3c5Smaybee list_node_t link; 2125745cd3c5Smaybee dsl_dataset_t *ds; 2126745cd3c5Smaybee }; 2127745cd3c5Smaybee 21283b2aab18SMatthew Ahrens typedef struct dsl_dataset_promote_arg { 21293b2aab18SMatthew Ahrens const char *ddpa_clonename; 21303b2aab18SMatthew Ahrens dsl_dataset_t *ddpa_clone; 213174e7dc98SMatthew Ahrens list_t shared_snaps, origin_snaps, clone_snaps; 21323b2aab18SMatthew Ahrens dsl_dataset_t *origin_origin; /* origin of the origin */ 213374e7dc98SMatthew Ahrens uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap; 2134681d9761SEric Taylor char *err_ds; 2135a2afb611SJerry Jelinek cred_t *cr; 21363b2aab18SMatthew Ahrens } dsl_dataset_promote_arg_t; 21371d452cf5Sahrens 213874e7dc98SMatthew Ahrens static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); 21393b2aab18SMatthew Ahrens static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, 21403b2aab18SMatthew Ahrens void *tag); 21413b2aab18SMatthew Ahrens static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); 214274e7dc98SMatthew Ahrens 214399653d4eSeschrock static int 21443b2aab18SMatthew Ahrens dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) 214599653d4eSeschrock { 21463b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t *ddpa = arg; 21473b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 21483b2aab18SMatthew Ahrens dsl_dataset_t *hds; 21493b2aab18SMatthew Ahrens struct promotenode *snap; 21503b2aab18SMatthew Ahrens dsl_dataset_t *origin_ds; 2151745cd3c5Smaybee int err; 2152cde58dbcSMatthew Ahrens uint64_t unused; 2153a2afb611SJerry Jelinek uint64_t ss_mv_cnt; 2154cb5842f8SAndriy Gapon size_t max_snap_len; 21551d452cf5Sahrens 21563b2aab18SMatthew Ahrens err = promote_hold(ddpa, dp, FTAG); 21573b2aab18SMatthew Ahrens if (err != 0) 21583b2aab18SMatthew Ahrens return (err); 215999653d4eSeschrock 21603b2aab18SMatthew Ahrens hds = ddpa->ddpa_clone; 2161cb5842f8SAndriy Gapon max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; 21621d452cf5Sahrens 2163c1379625SJustin T. Gibbs if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { 21643b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 2165be6fd75aSMatthew Ahrens return (SET_ERROR(EXDEV)); 21663b2aab18SMatthew Ahrens } 21673b2aab18SMatthew Ahrens 21683b2aab18SMatthew Ahrens /* 21693b2aab18SMatthew Ahrens * Compute and check the amount of space to transfer. Since this is 21703b2aab18SMatthew Ahrens * so expensive, don't do the preliminary check. 21713b2aab18SMatthew Ahrens */ 21723b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) { 21733b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 21743b2aab18SMatthew Ahrens return (0); 21753b2aab18SMatthew Ahrens } 21763b2aab18SMatthew Ahrens 21773b2aab18SMatthew Ahrens snap = list_head(&ddpa->shared_snaps); 21783b2aab18SMatthew Ahrens origin_ds = snap->ds; 217999653d4eSeschrock 21803cb34c60Sahrens /* compute origin's new unique space */ 21813b2aab18SMatthew Ahrens snap = list_tail(&ddpa->clone_snaps); 2182c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, 2183c1379625SJustin T. Gibbs origin_ds->ds_object); 2184cde58dbcSMatthew Ahrens dsl_deadlist_space_range(&snap->ds->ds_deadlist, 2185c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, 21863b2aab18SMatthew Ahrens &ddpa->unique, &unused, &unused); 218799653d4eSeschrock 2188745cd3c5Smaybee /* 2189745cd3c5Smaybee * Walk the snapshots that we are moving 2190745cd3c5Smaybee * 219174e7dc98SMatthew Ahrens * Compute space to transfer. Consider the incremental changes 21923b2aab18SMatthew Ahrens * to used by each snapshot: 219374e7dc98SMatthew Ahrens * (my used) = (prev's used) + (blocks born) - (blocks killed) 219474e7dc98SMatthew Ahrens * So each snapshot gave birth to: 219574e7dc98SMatthew Ahrens * (blocks born) = (my used) - (prev's used) + (blocks killed) 2196745cd3c5Smaybee * So a sequence would look like: 219774e7dc98SMatthew Ahrens * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) 2198745cd3c5Smaybee * Which simplifies to: 219974e7dc98SMatthew Ahrens * uN + kN + kN-1 + ... + k1 + k0 2200745cd3c5Smaybee * Note however, if we stop before we reach the ORIGIN we get: 220174e7dc98SMatthew Ahrens * uN + kN + kN-1 + ... + kM - uM-1 2202745cd3c5Smaybee */ 2203a2afb611SJerry Jelinek ss_mv_cnt = 0; 2204c1379625SJustin T. Gibbs ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; 2205c1379625SJustin T. Gibbs ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; 2206c1379625SJustin T. Gibbs ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; 22073b2aab18SMatthew Ahrens for (snap = list_head(&ddpa->shared_snaps); snap; 22083b2aab18SMatthew Ahrens snap = list_next(&ddpa->shared_snaps, snap)) { 220999653d4eSeschrock uint64_t val, dlused, dlcomp, dluncomp; 2210745cd3c5Smaybee dsl_dataset_t *ds = snap->ds; 221199653d4eSeschrock 2212a2afb611SJerry Jelinek ss_mv_cnt++; 2213a2afb611SJerry Jelinek 22143b2aab18SMatthew Ahrens /* 22153b2aab18SMatthew Ahrens * If there are long holds, we won't be able to evict 22163b2aab18SMatthew Ahrens * the objset. 22173b2aab18SMatthew Ahrens */ 22183b2aab18SMatthew Ahrens if (dsl_dataset_long_held(ds)) { 2219be6fd75aSMatthew Ahrens err = SET_ERROR(EBUSY); 22203b2aab18SMatthew Ahrens goto out; 22213b2aab18SMatthew Ahrens } 22223b2aab18SMatthew Ahrens 222399653d4eSeschrock /* Check that the snapshot name does not conflict */ 22243b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 2225cb5842f8SAndriy Gapon if (strlen(ds->ds_snapname) >= max_snap_len) { 2226cb5842f8SAndriy Gapon err = SET_ERROR(ENAMETOOLONG); 2227cb5842f8SAndriy Gapon goto out; 2228cb5842f8SAndriy Gapon } 2229745cd3c5Smaybee err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); 2230681d9761SEric Taylor if (err == 0) { 22313b2aab18SMatthew Ahrens (void) strcpy(ddpa->err_ds, snap->ds->ds_snapname); 2232be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 2233681d9761SEric Taylor goto out; 2234681d9761SEric Taylor } 2235745cd3c5Smaybee if (err != ENOENT) 2236681d9761SEric Taylor goto out; 223799653d4eSeschrock 2238745cd3c5Smaybee /* The very first snapshot does not have a deadlist */ 2239c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) 224074e7dc98SMatthew Ahrens continue; 224174e7dc98SMatthew Ahrens 2242cde58dbcSMatthew Ahrens dsl_deadlist_space(&ds->ds_deadlist, 2243cde58dbcSMatthew Ahrens &dlused, &dlcomp, &dluncomp); 22443b2aab18SMatthew Ahrens ddpa->used += dlused; 22453b2aab18SMatthew Ahrens ddpa->comp += dlcomp; 22463b2aab18SMatthew Ahrens ddpa->uncomp += dluncomp; 224774e7dc98SMatthew Ahrens } 2248745cd3c5Smaybee 2249745cd3c5Smaybee /* 2250745cd3c5Smaybee * If we are a clone of a clone then we never reached ORIGIN, 2251745cd3c5Smaybee * so we need to subtract out the clone origin's used space. 2252745cd3c5Smaybee */ 22533b2aab18SMatthew Ahrens if (ddpa->origin_origin) { 2254c1379625SJustin T. Gibbs ddpa->used -= 2255c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; 2256c1379625SJustin T. Gibbs ddpa->comp -= 2257c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; 22583b2aab18SMatthew Ahrens ddpa->uncomp -= 2259c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)-> 2260c1379625SJustin T. Gibbs ds_uncompressed_bytes; 226199653d4eSeschrock } 226299653d4eSeschrock 2263a2afb611SJerry Jelinek /* Check that there is enough space and limit headroom here */ 226474e7dc98SMatthew Ahrens err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, 2265a2afb611SJerry Jelinek 0, ss_mv_cnt, ddpa->used, ddpa->cr); 22663b2aab18SMatthew Ahrens if (err != 0) 22673b2aab18SMatthew Ahrens goto out; 226874e7dc98SMatthew Ahrens 226974e7dc98SMatthew Ahrens /* 227074e7dc98SMatthew Ahrens * Compute the amounts of space that will be used by snapshots 227174e7dc98SMatthew Ahrens * after the promotion (for both origin and clone). For each, 227274e7dc98SMatthew Ahrens * it is the amount of space that will be on all of their 227374e7dc98SMatthew Ahrens * deadlists (that was not born before their new origin). 227474e7dc98SMatthew Ahrens */ 2275c1379625SJustin T. Gibbs if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { 227674e7dc98SMatthew Ahrens uint64_t space; 227774e7dc98SMatthew Ahrens 227874e7dc98SMatthew Ahrens /* 227974e7dc98SMatthew Ahrens * Note, typically this will not be a clone of a clone, 22803f9d6ad7SLin Ling * so dd_origin_txg will be < TXG_INITIAL, so 2281cde58dbcSMatthew Ahrens * these snaplist_space() -> dsl_deadlist_space_range() 228274e7dc98SMatthew Ahrens * calls will be fast because they do not have to 228374e7dc98SMatthew Ahrens * iterate over all bps. 228474e7dc98SMatthew Ahrens */ 22853b2aab18SMatthew Ahrens snap = list_head(&ddpa->origin_snaps); 22863b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->shared_snaps, 22873b2aab18SMatthew Ahrens snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); 22883b2aab18SMatthew Ahrens if (err != 0) 22893b2aab18SMatthew Ahrens goto out; 229074e7dc98SMatthew Ahrens 22913b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->clone_snaps, 22923f9d6ad7SLin Ling snap->ds->ds_dir->dd_origin_txg, &space); 22933b2aab18SMatthew Ahrens if (err != 0) 22943b2aab18SMatthew Ahrens goto out; 22953b2aab18SMatthew Ahrens ddpa->cloneusedsnap += space; 229674e7dc98SMatthew Ahrens } 2297c1379625SJustin T. Gibbs if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & 2298c1379625SJustin T. Gibbs DD_FLAG_USED_BREAKDOWN) { 22993b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->origin_snaps, 2300c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_creation_txg, 2301c1379625SJustin T. Gibbs &ddpa->originusedsnap); 23023b2aab18SMatthew Ahrens if (err != 0) 23033b2aab18SMatthew Ahrens goto out; 2304745cd3c5Smaybee } 23051d452cf5Sahrens 2306681d9761SEric Taylor out: 23073b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 2308681d9761SEric Taylor return (err); 23091d452cf5Sahrens } 231099653d4eSeschrock 23111d452cf5Sahrens static void 23123b2aab18SMatthew Ahrens dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) 23131d452cf5Sahrens { 23143b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t *ddpa = arg; 23153b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 23163b2aab18SMatthew Ahrens dsl_dataset_t *hds; 23173b2aab18SMatthew Ahrens struct promotenode *snap; 23183b2aab18SMatthew Ahrens dsl_dataset_t *origin_ds; 23193b2aab18SMatthew Ahrens dsl_dataset_t *origin_head; 23203b2aab18SMatthew Ahrens dsl_dir_t *dd; 23213cb34c60Sahrens dsl_dir_t *odd = NULL; 2322088f3894Sahrens uint64_t oldnext_obj; 232374e7dc98SMatthew Ahrens int64_t delta; 23241d452cf5Sahrens 23253b2aab18SMatthew Ahrens VERIFY0(promote_hold(ddpa, dp, FTAG)); 23263b2aab18SMatthew Ahrens hds = ddpa->ddpa_clone; 23273b2aab18SMatthew Ahrens 2328c1379625SJustin T. Gibbs ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); 23291d452cf5Sahrens 23303b2aab18SMatthew Ahrens snap = list_head(&ddpa->shared_snaps); 23313b2aab18SMatthew Ahrens origin_ds = snap->ds; 23323b2aab18SMatthew Ahrens dd = hds->ds_dir; 23333b2aab18SMatthew Ahrens 23343b2aab18SMatthew Ahrens snap = list_head(&ddpa->origin_snaps); 233574e7dc98SMatthew Ahrens origin_head = snap->ds; 233674e7dc98SMatthew Ahrens 23370b69c2f0Sahrens /* 23383cb34c60Sahrens * We need to explicitly open odd, since origin_ds's dd will be 23390b69c2f0Sahrens * changing. 23400b69c2f0Sahrens */ 23413b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, 23423cb34c60Sahrens NULL, FTAG, &odd)); 234399653d4eSeschrock 2344745cd3c5Smaybee /* change origin's next snap */ 2345745cd3c5Smaybee dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); 2346c1379625SJustin T. Gibbs oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; 23473b2aab18SMatthew Ahrens snap = list_tail(&ddpa->clone_snaps); 2348c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, 2349c1379625SJustin T. Gibbs origin_ds->ds_object); 2350c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; 2351745cd3c5Smaybee 2352088f3894Sahrens /* change the origin's next clone */ 2353c1379625SJustin T. Gibbs if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { 23543b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(origin_ds, 23553b2aab18SMatthew Ahrens snap->ds->ds_object, tx); 23563b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2357c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_next_clones_obj, 2358088f3894Sahrens oldnext_obj, tx)); 2359088f3894Sahrens } 2360088f3894Sahrens 2361745cd3c5Smaybee /* change origin */ 2362745cd3c5Smaybee dmu_buf_will_dirty(dd->dd_dbuf, tx); 2363c1379625SJustin T. Gibbs ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); 2364c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; 23653f9d6ad7SLin Ling dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; 2366745cd3c5Smaybee dmu_buf_will_dirty(odd->dd_dbuf, tx); 2367c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; 23683f9d6ad7SLin Ling origin_head->ds_dir->dd_origin_txg = 2369c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_creation_txg; 2370745cd3c5Smaybee 2371cde58dbcSMatthew Ahrens /* change dd_clone entries */ 2372cde58dbcSMatthew Ahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 23733b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 2374c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); 23753b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2376c1379625SJustin T. Gibbs dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, 2377cde58dbcSMatthew Ahrens hds->ds_object, tx)); 2378cde58dbcSMatthew Ahrens 23793b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 2380c1379625SJustin T. Gibbs dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, 2381cde58dbcSMatthew Ahrens origin_head->ds_object, tx)); 2382c1379625SJustin T. Gibbs if (dsl_dir_phys(dd)->dd_clones == 0) { 2383c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones = 2384c1379625SJustin T. Gibbs zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, 2385c1379625SJustin T. Gibbs DMU_OT_NONE, 0, tx); 2386cde58dbcSMatthew Ahrens } 23873b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2388c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); 2389cde58dbcSMatthew Ahrens } 2390cde58dbcSMatthew Ahrens 239199653d4eSeschrock /* move snapshots to this dir */ 23923b2aab18SMatthew Ahrens for (snap = list_head(&ddpa->shared_snaps); snap; 23933b2aab18SMatthew Ahrens snap = list_next(&ddpa->shared_snaps, snap)) { 2394745cd3c5Smaybee dsl_dataset_t *ds = snap->ds; 239599653d4eSeschrock 23963b2aab18SMatthew Ahrens /* 23973b2aab18SMatthew Ahrens * Property callbacks are registered to a particular 23983b2aab18SMatthew Ahrens * dsl_dir. Since ours is changing, evict the objset 23993b2aab18SMatthew Ahrens * so that they will be unregistered from the old dsl_dir. 24003b2aab18SMatthew Ahrens */ 2401503ad85cSMatthew Ahrens if (ds->ds_objset) { 2402503ad85cSMatthew Ahrens dmu_objset_evict(ds->ds_objset); 2403503ad85cSMatthew Ahrens ds->ds_objset = NULL; 24043baa08fcSek } 24053b2aab18SMatthew Ahrens 240699653d4eSeschrock /* move snap name entry */ 24073b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 24083b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_snap_remove(origin_head, 2409a2afb611SJerry Jelinek ds->ds_snapname, tx, B_TRUE)); 24103b2aab18SMatthew Ahrens VERIFY0(zap_add(dp->dp_meta_objset, 2411c1379625SJustin T. Gibbs dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, 241299653d4eSeschrock 8, 1, &ds->ds_object, tx)); 2413a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(hds->ds_dir, 1, 2414a2afb611SJerry Jelinek DD_FIELD_SNAPSHOT_COUNT, tx); 2415cde58dbcSMatthew Ahrens 241699653d4eSeschrock /* change containing dsl_dir */ 241799653d4eSeschrock dmu_buf_will_dirty(ds->ds_dbuf, tx); 2418c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); 2419c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; 24203cb34c60Sahrens ASSERT3P(ds->ds_dir, ==, odd); 24213b2aab18SMatthew Ahrens dsl_dir_rele(ds->ds_dir, ds); 24223b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, 242399653d4eSeschrock NULL, ds, &ds->ds_dir)); 242499653d4eSeschrock 2425cde58dbcSMatthew Ahrens /* move any clone references */ 2426c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_clones_obj && 2427cde58dbcSMatthew Ahrens spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 2428cde58dbcSMatthew Ahrens zap_cursor_t zc; 2429cde58dbcSMatthew Ahrens zap_attribute_t za; 2430cde58dbcSMatthew Ahrens 24313b2aab18SMatthew Ahrens for (zap_cursor_init(&zc, dp->dp_meta_objset, 2432c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_next_clones_obj); 24333b2aab18SMatthew Ahrens zap_cursor_retrieve(&zc, &za) == 0; 24343b2aab18SMatthew Ahrens zap_cursor_advance(&zc)) { 24353b2aab18SMatthew Ahrens dsl_dataset_t *cnds; 24363b2aab18SMatthew Ahrens uint64_t o; 2437a9799022Sck 24383b2aab18SMatthew Ahrens if (za.za_first_integer == oldnext_obj) { 24393b2aab18SMatthew Ahrens /* 24403b2aab18SMatthew Ahrens * We've already moved the 24413b2aab18SMatthew Ahrens * origin's reference. 24423b2aab18SMatthew Ahrens */ 24433b2aab18SMatthew Ahrens continue; 24443b2aab18SMatthew Ahrens } 2445a9799022Sck 24463b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 24473b2aab18SMatthew Ahrens za.za_first_integer, FTAG, &cnds)); 2448c1379625SJustin T. Gibbs o = dsl_dir_phys(cnds->ds_dir)-> 2449c1379625SJustin T. Gibbs dd_head_dataset_obj; 2450a9799022Sck 24513b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 2452c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_clones, o, tx)); 24533b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2454c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones, o, tx)); 24553b2aab18SMatthew Ahrens dsl_dataset_rele(cnds, FTAG); 24563b2aab18SMatthew Ahrens } 24573b2aab18SMatthew Ahrens zap_cursor_fini(&zc); 24583b2aab18SMatthew Ahrens } 24599082849eSck 24603b2aab18SMatthew Ahrens ASSERT(!dsl_prop_hascb(ds)); 2461a9799022Sck } 2462a9799022Sck 2463a9799022Sck /* 24643b2aab18SMatthew Ahrens * Change space accounting. 24653b2aab18SMatthew Ahrens * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either 24663b2aab18SMatthew Ahrens * both be valid, or both be 0 (resulting in delta == 0). This 24673b2aab18SMatthew Ahrens * is true for each of {clone,origin} independently. 2468a9799022Sck */ 2469a9799022Sck 24703b2aab18SMatthew Ahrens delta = ddpa->cloneusedsnap - 2471c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; 24723b2aab18SMatthew Ahrens ASSERT3S(delta, >=, 0); 24733b2aab18SMatthew Ahrens ASSERT3U(ddpa->used, >=, delta); 24743b2aab18SMatthew Ahrens dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); 24753b2aab18SMatthew Ahrens dsl_dir_diduse_space(dd, DD_USED_HEAD, 24763b2aab18SMatthew Ahrens ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); 24773b2aab18SMatthew Ahrens 24783b2aab18SMatthew Ahrens delta = ddpa->originusedsnap - 2479c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; 24803b2aab18SMatthew Ahrens ASSERT3S(delta, <=, 0); 24813b2aab18SMatthew Ahrens ASSERT3U(ddpa->used, >=, -delta); 24823b2aab18SMatthew Ahrens dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); 24833b2aab18SMatthew Ahrens dsl_dir_diduse_space(odd, DD_USED_HEAD, 24843b2aab18SMatthew Ahrens -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); 24853b2aab18SMatthew Ahrens 2486c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; 24873b2aab18SMatthew Ahrens 24883b2aab18SMatthew Ahrens /* log history record */ 24893b2aab18SMatthew Ahrens spa_history_log_internal_ds(hds, "promote", tx, ""); 24903b2aab18SMatthew Ahrens 24913b2aab18SMatthew Ahrens dsl_dir_rele(odd, FTAG); 24923b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 2493a9799022Sck } 2494a9799022Sck 24953b2aab18SMatthew Ahrens /* 24963b2aab18SMatthew Ahrens * Make a list of dsl_dataset_t's for the snapshots between first_obj 24973b2aab18SMatthew Ahrens * (exclusive) and last_obj (inclusive). The list will be in reverse 24983b2aab18SMatthew Ahrens * order (last_obj will be the list_head()). If first_obj == 0, do all 24993b2aab18SMatthew Ahrens * snapshots back to this dataset's origin. 25003b2aab18SMatthew Ahrens */ 2501a9799022Sck static int 25023b2aab18SMatthew Ahrens snaplist_make(dsl_pool_t *dp, 25033b2aab18SMatthew Ahrens uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) 2504a9799022Sck { 25053b2aab18SMatthew Ahrens uint64_t obj = last_obj; 2506a9799022Sck 25073b2aab18SMatthew Ahrens list_create(l, sizeof (struct promotenode), 25083b2aab18SMatthew Ahrens offsetof(struct promotenode, link)); 2509a9799022Sck 25103b2aab18SMatthew Ahrens while (obj != first_obj) { 25113b2aab18SMatthew Ahrens dsl_dataset_t *ds; 25123b2aab18SMatthew Ahrens struct promotenode *snap; 25133b2aab18SMatthew Ahrens int err; 251492241e0bSTom Erickson 25153b2aab18SMatthew Ahrens err = dsl_dataset_hold_obj(dp, obj, tag, &ds); 25163b2aab18SMatthew Ahrens ASSERT(err != ENOENT); 25173b2aab18SMatthew Ahrens if (err != 0) 25183b2aab18SMatthew Ahrens return (err); 2519a9799022Sck 25203b2aab18SMatthew Ahrens if (first_obj == 0) 2521c1379625SJustin T. Gibbs first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; 25223b2aab18SMatthew Ahrens 25233b2aab18SMatthew Ahrens snap = kmem_alloc(sizeof (*snap), KM_SLEEP); 25243b2aab18SMatthew Ahrens snap->ds = ds; 25253b2aab18SMatthew Ahrens list_insert_tail(l, snap); 2526c1379625SJustin T. Gibbs obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 25273b2aab18SMatthew Ahrens } 2528a9799022Sck 2529a9799022Sck return (0); 2530a9799022Sck } 2531a9799022Sck 25323b2aab18SMatthew Ahrens static int 25333b2aab18SMatthew Ahrens snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) 2534a9799022Sck { 25353b2aab18SMatthew Ahrens struct promotenode *snap; 2536a9799022Sck 25373b2aab18SMatthew Ahrens *spacep = 0; 25383b2aab18SMatthew Ahrens for (snap = list_head(l); snap; snap = list_next(l, snap)) { 25393b2aab18SMatthew Ahrens uint64_t used, comp, uncomp; 25403b2aab18SMatthew Ahrens dsl_deadlist_space_range(&snap->ds->ds_deadlist, 25413b2aab18SMatthew Ahrens mintxg, UINT64_MAX, &used, &comp, &uncomp); 25423b2aab18SMatthew Ahrens *spacep += used; 254392241e0bSTom Erickson } 25443b2aab18SMatthew Ahrens return (0); 2545a9799022Sck } 2546a9799022Sck 25473b2aab18SMatthew Ahrens static void 25483b2aab18SMatthew Ahrens snaplist_destroy(list_t *l, void *tag) 2549a9799022Sck { 25503b2aab18SMatthew Ahrens struct promotenode *snap; 255192241e0bSTom Erickson 25523b2aab18SMatthew Ahrens if (l == NULL || !list_link_active(&l->list_head)) 25533b2aab18SMatthew Ahrens return; 2554a9799022Sck 25553b2aab18SMatthew Ahrens while ((snap = list_tail(l)) != NULL) { 25563b2aab18SMatthew Ahrens list_remove(l, snap); 25573b2aab18SMatthew Ahrens dsl_dataset_rele(snap->ds, tag); 25583b2aab18SMatthew Ahrens kmem_free(snap, sizeof (*snap)); 25593b2aab18SMatthew Ahrens } 25603b2aab18SMatthew Ahrens list_destroy(l); 2561a9799022Sck } 2562a9799022Sck 2563a9799022Sck static int 25643b2aab18SMatthew Ahrens promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) 2565a9799022Sck { 25663b2aab18SMatthew Ahrens int error; 25673b2aab18SMatthew Ahrens dsl_dir_t *dd; 25683b2aab18SMatthew Ahrens struct promotenode *snap; 2569a9799022Sck 25703b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, 25713b2aab18SMatthew Ahrens &ddpa->ddpa_clone); 25723b2aab18SMatthew Ahrens if (error != 0) 25733b2aab18SMatthew Ahrens return (error); 25743b2aab18SMatthew Ahrens dd = ddpa->ddpa_clone->ds_dir; 2575a9799022Sck 2576bc9014e6SJustin Gibbs if (ddpa->ddpa_clone->ds_is_snapshot || 25773b2aab18SMatthew Ahrens !dsl_dir_is_clone(dd)) { 25783b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->ddpa_clone, tag); 2579be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 25803b2aab18SMatthew Ahrens } 2581a9799022Sck 2582c1379625SJustin T. Gibbs error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, 25833b2aab18SMatthew Ahrens &ddpa->shared_snaps, tag); 25843b2aab18SMatthew Ahrens if (error != 0) 25853b2aab18SMatthew Ahrens goto out; 2586a9799022Sck 25873b2aab18SMatthew Ahrens error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, 25883b2aab18SMatthew Ahrens &ddpa->clone_snaps, tag); 25893b2aab18SMatthew Ahrens if (error != 0) 25903b2aab18SMatthew Ahrens goto out; 2591a9799022Sck 25923b2aab18SMatthew Ahrens snap = list_head(&ddpa->shared_snaps); 2593c1379625SJustin T. Gibbs ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); 2594c1379625SJustin T. Gibbs error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, 2595c1379625SJustin T. Gibbs dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, 25963b2aab18SMatthew Ahrens &ddpa->origin_snaps, tag); 25973b2aab18SMatthew Ahrens if (error != 0) 25983b2aab18SMatthew Ahrens goto out; 2599379c004dSEric Schrock 2600c1379625SJustin T. Gibbs if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { 26013b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, 2602c1379625SJustin T. Gibbs dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, 26033b2aab18SMatthew Ahrens tag, &ddpa->origin_origin); 26043b2aab18SMatthew Ahrens if (error != 0) 26053b2aab18SMatthew Ahrens goto out; 2606379c004dSEric Schrock } 26073b2aab18SMatthew Ahrens out: 26083b2aab18SMatthew Ahrens if (error != 0) 26093b2aab18SMatthew Ahrens promote_rele(ddpa, tag); 26103b2aab18SMatthew Ahrens return (error); 2611a9799022Sck } 2612a9799022Sck 2613a9799022Sck static void 26143b2aab18SMatthew Ahrens promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) 2615a9799022Sck { 26163b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->shared_snaps, tag); 26173b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->clone_snaps, tag); 26183b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->origin_snaps, tag); 26193b2aab18SMatthew Ahrens if (ddpa->origin_origin != NULL) 26203b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->origin_origin, tag); 26213b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->ddpa_clone, tag); 26223b2aab18SMatthew Ahrens } 262302c8f3f0SMatthew Ahrens 26243b2aab18SMatthew Ahrens /* 26253b2aab18SMatthew Ahrens * Promote a clone. 26263b2aab18SMatthew Ahrens * 26273b2aab18SMatthew Ahrens * If it fails due to a conflicting snapshot name, "conflsnap" will be filled 26283b2aab18SMatthew Ahrens * in with the name. (It must be at least MAXNAMELEN bytes long.) 26293b2aab18SMatthew Ahrens */ 26303b2aab18SMatthew Ahrens int 26313b2aab18SMatthew Ahrens dsl_dataset_promote(const char *name, char *conflsnap) 26323b2aab18SMatthew Ahrens { 26333b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t ddpa = { 0 }; 26343b2aab18SMatthew Ahrens uint64_t numsnaps; 26353b2aab18SMatthew Ahrens int error; 26363b2aab18SMatthew Ahrens objset_t *os; 263792241e0bSTom Erickson 26383b2aab18SMatthew Ahrens /* 26393b2aab18SMatthew Ahrens * We will modify space proportional to the number of 26403b2aab18SMatthew Ahrens * snapshots. Compute numsnaps. 26413b2aab18SMatthew Ahrens */ 26423b2aab18SMatthew Ahrens error = dmu_objset_hold(name, FTAG, &os); 26433b2aab18SMatthew Ahrens if (error != 0) 26443b2aab18SMatthew Ahrens return (error); 26453b2aab18SMatthew Ahrens error = zap_count(dmu_objset_pool(os)->dp_meta_objset, 2646c1379625SJustin T. Gibbs dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, 2647c1379625SJustin T. Gibbs &numsnaps); 26483b2aab18SMatthew Ahrens dmu_objset_rele(os, FTAG); 26493b2aab18SMatthew Ahrens if (error != 0) 26503b2aab18SMatthew Ahrens return (error); 265102c8f3f0SMatthew Ahrens 26523b2aab18SMatthew Ahrens ddpa.ddpa_clonename = name; 26533b2aab18SMatthew Ahrens ddpa.err_ds = conflsnap; 2654a2afb611SJerry Jelinek ddpa.cr = CRED(); 265502c8f3f0SMatthew Ahrens 26563b2aab18SMatthew Ahrens return (dsl_sync_task(name, dsl_dataset_promote_check, 26577d46dc6cSMatthew Ahrens dsl_dataset_promote_sync, &ddpa, 26587d46dc6cSMatthew Ahrens 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED)); 2659a9799022Sck } 2660a9799022Sck 2661a9799022Sck int 26623b2aab18SMatthew Ahrens dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, 266391948b51SKeith M Wesolowski dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) 2664a9799022Sck { 26653b2aab18SMatthew Ahrens int64_t unused_refres_delta; 2666a9799022Sck 26673b2aab18SMatthew Ahrens /* they should both be heads */ 2668bc9014e6SJustin Gibbs if (clone->ds_is_snapshot || 2669bc9014e6SJustin Gibbs origin_head->ds_is_snapshot) 2670be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 267192241e0bSTom Erickson 267234f2f8cfSMatthew Ahrens /* if we are not forcing, the branch point should be just before them */ 267334f2f8cfSMatthew Ahrens if (!force && clone->ds_prev != origin_head->ds_prev) 2674be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2675a9799022Sck 26763b2aab18SMatthew Ahrens /* clone should be the clone (unless they are unrelated) */ 26773b2aab18SMatthew Ahrens if (clone->ds_prev != NULL && 26783b2aab18SMatthew Ahrens clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && 267934f2f8cfSMatthew Ahrens origin_head->ds_dir != clone->ds_prev->ds_dir) 2680be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 268192241e0bSTom Erickson 26823b2aab18SMatthew Ahrens /* the clone should be a child of the origin */ 26833b2aab18SMatthew Ahrens if (clone->ds_dir->dd_parent != origin_head->ds_dir) 2684be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2685842727c2SChris Kirby 26863b2aab18SMatthew Ahrens /* origin_head shouldn't be modified unless 'force' */ 268734f2f8cfSMatthew Ahrens if (!force && 268834f2f8cfSMatthew Ahrens dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) 2689be6fd75aSMatthew Ahrens return (SET_ERROR(ETXTBSY)); 2690c99e4bdcSChris Kirby 26913b2aab18SMatthew Ahrens /* origin_head should have no long holds (e.g. is not mounted) */ 269291948b51SKeith M Wesolowski if (dsl_dataset_handoff_check(origin_head, owner, tx)) 2693be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 26943b2aab18SMatthew Ahrens 26953b2aab18SMatthew Ahrens /* check amount of any unconsumed refreservation */ 26963b2aab18SMatthew Ahrens unused_refres_delta = 26973b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2698c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_unique_bytes) - 26993b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2700c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 27013b2aab18SMatthew Ahrens 27023b2aab18SMatthew Ahrens if (unused_refres_delta > 0 && 27033b2aab18SMatthew Ahrens unused_refres_delta > 27043b2aab18SMatthew Ahrens dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) 2705be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 27063b2aab18SMatthew Ahrens 27073b2aab18SMatthew Ahrens /* clone can't be over the head's refquota */ 27083b2aab18SMatthew Ahrens if (origin_head->ds_quota != 0 && 2709c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_referenced_bytes > 2710c1379625SJustin T. Gibbs origin_head->ds_quota) 2711be6fd75aSMatthew Ahrens return (SET_ERROR(EDQUOT)); 2712c99e4bdcSChris Kirby 27133b2aab18SMatthew Ahrens return (0); 2714c99e4bdcSChris Kirby } 2715c99e4bdcSChris Kirby 2716a7f53a56SChris Kirby void 27173b2aab18SMatthew Ahrens dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, 27183b2aab18SMatthew Ahrens dsl_dataset_t *origin_head, dmu_tx_t *tx) 2719a7f53a56SChris Kirby { 27203b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 27213b2aab18SMatthew Ahrens int64_t unused_refres_delta; 2722a7f53a56SChris Kirby 27233b2aab18SMatthew Ahrens ASSERT(clone->ds_reserved == 0); 27243b2aab18SMatthew Ahrens ASSERT(origin_head->ds_quota == 0 || 2725c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota); 272634f2f8cfSMatthew Ahrens ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); 2727842727c2SChris Kirby 2728ca0cc391SMatthew Ahrens /* 2729ca0cc391SMatthew Ahrens * Swap per-dataset feature flags. 2730ca0cc391SMatthew Ahrens */ 2731ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 2732ca0cc391SMatthew Ahrens if (!(spa_feature_table[f].fi_flags & 2733ca0cc391SMatthew Ahrens ZFEATURE_FLAG_PER_DATASET)) { 2734ca0cc391SMatthew Ahrens ASSERT(!clone->ds_feature_inuse[f]); 2735ca0cc391SMatthew Ahrens ASSERT(!origin_head->ds_feature_inuse[f]); 2736ca0cc391SMatthew Ahrens continue; 2737ca0cc391SMatthew Ahrens } 2738ca0cc391SMatthew Ahrens 2739ca0cc391SMatthew Ahrens boolean_t clone_inuse = clone->ds_feature_inuse[f]; 2740ca0cc391SMatthew Ahrens boolean_t origin_head_inuse = origin_head->ds_feature_inuse[f]; 2741ca0cc391SMatthew Ahrens 2742ca0cc391SMatthew Ahrens if (clone_inuse) { 2743ca0cc391SMatthew Ahrens dsl_dataset_deactivate_feature(clone->ds_object, f, tx); 2744ca0cc391SMatthew Ahrens clone->ds_feature_inuse[f] = B_FALSE; 2745ca0cc391SMatthew Ahrens } 2746ca0cc391SMatthew Ahrens if (origin_head_inuse) { 2747ca0cc391SMatthew Ahrens dsl_dataset_deactivate_feature(origin_head->ds_object, 2748ca0cc391SMatthew Ahrens f, tx); 2749ca0cc391SMatthew Ahrens origin_head->ds_feature_inuse[f] = B_FALSE; 2750ca0cc391SMatthew Ahrens } 2751ca0cc391SMatthew Ahrens if (clone_inuse) { 2752ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(origin_head->ds_object, 2753ca0cc391SMatthew Ahrens f, tx); 2754ca0cc391SMatthew Ahrens origin_head->ds_feature_inuse[f] = B_TRUE; 2755ca0cc391SMatthew Ahrens } 2756ca0cc391SMatthew Ahrens if (origin_head_inuse) { 2757ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(clone->ds_object, f, tx); 2758ca0cc391SMatthew Ahrens clone->ds_feature_inuse[f] = B_TRUE; 2759ca0cc391SMatthew Ahrens } 2760ca0cc391SMatthew Ahrens } 2761ca0cc391SMatthew Ahrens 27623b2aab18SMatthew Ahrens dmu_buf_will_dirty(clone->ds_dbuf, tx); 27633b2aab18SMatthew Ahrens dmu_buf_will_dirty(origin_head->ds_dbuf, tx); 2764842727c2SChris Kirby 27653b2aab18SMatthew Ahrens if (clone->ds_objset != NULL) { 27663b2aab18SMatthew Ahrens dmu_objset_evict(clone->ds_objset); 27673b2aab18SMatthew Ahrens clone->ds_objset = NULL; 27683b2aab18SMatthew Ahrens } 2769842727c2SChris Kirby 27703b2aab18SMatthew Ahrens if (origin_head->ds_objset != NULL) { 27713b2aab18SMatthew Ahrens dmu_objset_evict(origin_head->ds_objset); 27723b2aab18SMatthew Ahrens origin_head->ds_objset = NULL; 2773842727c2SChris Kirby } 2774842727c2SChris Kirby 27753b2aab18SMatthew Ahrens unused_refres_delta = 27763b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2777c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_unique_bytes) - 27783b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2779c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 27803b2aab18SMatthew Ahrens 27813b2aab18SMatthew Ahrens /* 27823b2aab18SMatthew Ahrens * Reset origin's unique bytes, if it exists. 27833b2aab18SMatthew Ahrens */ 27843b2aab18SMatthew Ahrens if (clone->ds_prev) { 27853b2aab18SMatthew Ahrens dsl_dataset_t *origin = clone->ds_prev; 27863b2aab18SMatthew Ahrens uint64_t comp, uncomp; 27873b2aab18SMatthew Ahrens 27883b2aab18SMatthew Ahrens dmu_buf_will_dirty(origin->ds_dbuf, tx); 27893b2aab18SMatthew Ahrens dsl_deadlist_space_range(&clone->ds_deadlist, 2790c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, 2791c1379625SJustin T. Gibbs &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); 27923b2aab18SMatthew Ahrens } 27933b2aab18SMatthew Ahrens 27943b2aab18SMatthew Ahrens /* swap blkptrs */ 27953b2aab18SMatthew Ahrens { 27963b2aab18SMatthew Ahrens blkptr_t tmp; 2797c1379625SJustin T. Gibbs tmp = dsl_dataset_phys(origin_head)->ds_bp; 2798c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_bp = 2799c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_bp; 2800c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_bp = tmp; 28013b2aab18SMatthew Ahrens } 28023b2aab18SMatthew Ahrens 28033b2aab18SMatthew Ahrens /* set dd_*_bytes */ 28043b2aab18SMatthew Ahrens { 28053b2aab18SMatthew Ahrens int64_t dused, dcomp, duncomp; 28063b2aab18SMatthew Ahrens uint64_t cdl_used, cdl_comp, cdl_uncomp; 28073b2aab18SMatthew Ahrens uint64_t odl_used, odl_comp, odl_uncomp; 28083b2aab18SMatthew Ahrens 2809c1379625SJustin T. Gibbs ASSERT3U(dsl_dir_phys(clone->ds_dir)-> 28103b2aab18SMatthew Ahrens dd_used_breakdown[DD_USED_SNAP], ==, 0); 28113b2aab18SMatthew Ahrens 28123b2aab18SMatthew Ahrens dsl_deadlist_space(&clone->ds_deadlist, 28133b2aab18SMatthew Ahrens &cdl_used, &cdl_comp, &cdl_uncomp); 28143b2aab18SMatthew Ahrens dsl_deadlist_space(&origin_head->ds_deadlist, 28153b2aab18SMatthew Ahrens &odl_used, &odl_comp, &odl_uncomp); 281615508ac0SChris Kirby 2817c1379625SJustin T. Gibbs dused = dsl_dataset_phys(clone)->ds_referenced_bytes + 2818c1379625SJustin T. Gibbs cdl_used - 2819c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_referenced_bytes + 2820c1379625SJustin T. Gibbs odl_used); 2821c1379625SJustin T. Gibbs dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + 2822c1379625SJustin T. Gibbs cdl_comp - 2823c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_compressed_bytes + 2824c1379625SJustin T. Gibbs odl_comp); 2825c1379625SJustin T. Gibbs duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + 28263b2aab18SMatthew Ahrens cdl_uncomp - 2827c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + 2828c1379625SJustin T. Gibbs odl_uncomp); 2829842727c2SChris Kirby 28303b2aab18SMatthew Ahrens dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, 28313b2aab18SMatthew Ahrens dused, dcomp, duncomp, tx); 28323b2aab18SMatthew Ahrens dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, 28333b2aab18SMatthew Ahrens -dused, -dcomp, -duncomp, tx); 2834842727c2SChris Kirby 2835842727c2SChris Kirby /* 28363b2aab18SMatthew Ahrens * The difference in the space used by snapshots is the 28373b2aab18SMatthew Ahrens * difference in snapshot space due to the head's 28383b2aab18SMatthew Ahrens * deadlist (since that's the only thing that's 28393b2aab18SMatthew Ahrens * changing that affects the snapused). 2840842727c2SChris Kirby */ 28413b2aab18SMatthew Ahrens dsl_deadlist_space_range(&clone->ds_deadlist, 28423b2aab18SMatthew Ahrens origin_head->ds_dir->dd_origin_txg, UINT64_MAX, 28433b2aab18SMatthew Ahrens &cdl_used, &cdl_comp, &cdl_uncomp); 28443b2aab18SMatthew Ahrens dsl_deadlist_space_range(&origin_head->ds_deadlist, 28453b2aab18SMatthew Ahrens origin_head->ds_dir->dd_origin_txg, UINT64_MAX, 28463b2aab18SMatthew Ahrens &odl_used, &odl_comp, &odl_uncomp); 28473b2aab18SMatthew Ahrens dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, 28483b2aab18SMatthew Ahrens DD_USED_HEAD, DD_USED_SNAP, tx); 2849842727c2SChris Kirby } 2850842727c2SChris Kirby 28513b2aab18SMatthew Ahrens /* swap ds_*_bytes */ 2852c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, 2853c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_referenced_bytes); 2854c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, 2855c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_compressed_bytes); 2856c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, 2857c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_uncompressed_bytes); 2858c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, 2859c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 2860842727c2SChris Kirby 28613b2aab18SMatthew Ahrens /* apply any parent delta for change in unconsumed refreservation */ 28623b2aab18SMatthew Ahrens dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, 28633b2aab18SMatthew Ahrens unused_refres_delta, 0, 0, tx); 2864ca45db41SChris Kirby 28653b2aab18SMatthew Ahrens /* 28663b2aab18SMatthew Ahrens * Swap deadlists. 28673b2aab18SMatthew Ahrens */ 28683b2aab18SMatthew Ahrens dsl_deadlist_close(&clone->ds_deadlist); 28693b2aab18SMatthew Ahrens dsl_deadlist_close(&origin_head->ds_deadlist); 2870c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, 2871c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_deadlist_obj); 28723b2aab18SMatthew Ahrens dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, 2873c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_deadlist_obj); 28743b2aab18SMatthew Ahrens dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, 2875c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_deadlist_obj); 2876842727c2SChris Kirby 28773b2aab18SMatthew Ahrens dsl_scan_ds_clone_swapped(origin_head, clone, tx); 2878842727c2SChris Kirby 28793b2aab18SMatthew Ahrens spa_history_log_internal_ds(clone, "clone swap", tx, 28803b2aab18SMatthew Ahrens "parent=%s", origin_head->ds_dir->dd_myname); 2881842727c2SChris Kirby } 2882842727c2SChris Kirby 28833b2aab18SMatthew Ahrens /* 28843b2aab18SMatthew Ahrens * Given a pool name and a dataset object number in that pool, 28853b2aab18SMatthew Ahrens * return the name of that dataset. 28863b2aab18SMatthew Ahrens */ 2887a7f53a56SChris Kirby int 28883b2aab18SMatthew Ahrens dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) 2889a7f53a56SChris Kirby { 28903b2aab18SMatthew Ahrens dsl_pool_t *dp; 28913b2aab18SMatthew Ahrens dsl_dataset_t *ds; 2892a7f53a56SChris Kirby int error; 2893a7f53a56SChris Kirby 28943b2aab18SMatthew Ahrens error = dsl_pool_hold(pname, FTAG, &dp); 28953b2aab18SMatthew Ahrens if (error != 0) 28963b2aab18SMatthew Ahrens return (error); 28973b2aab18SMatthew Ahrens 28983b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); 28993b2aab18SMatthew Ahrens if (error == 0) { 29003b2aab18SMatthew Ahrens dsl_dataset_name(ds, buf); 29013b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 29023b2aab18SMatthew Ahrens } 29033b2aab18SMatthew Ahrens dsl_pool_rele(dp, FTAG); 2904a7f53a56SChris Kirby 2905a7f53a56SChris Kirby return (error); 2906a7f53a56SChris Kirby } 2907a7f53a56SChris Kirby 2908842727c2SChris Kirby int 29093b2aab18SMatthew Ahrens dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, 29103b2aab18SMatthew Ahrens uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) 2911842727c2SChris Kirby { 29123b2aab18SMatthew Ahrens int error = 0; 2913842727c2SChris Kirby 29143b2aab18SMatthew Ahrens ASSERT3S(asize, >, 0); 2915842727c2SChris Kirby 29163b2aab18SMatthew Ahrens /* 29173b2aab18SMatthew Ahrens * *ref_rsrv is the portion of asize that will come from any 29183b2aab18SMatthew Ahrens * unconsumed refreservation space. 29193b2aab18SMatthew Ahrens */ 29203b2aab18SMatthew Ahrens *ref_rsrv = 0; 2921842727c2SChris Kirby 29223b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 29233b2aab18SMatthew Ahrens /* 29243b2aab18SMatthew Ahrens * Make a space adjustment for reserved bytes. 29253b2aab18SMatthew Ahrens */ 2926c1379625SJustin T. Gibbs if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { 29273b2aab18SMatthew Ahrens ASSERT3U(*used, >=, 2928c1379625SJustin T. Gibbs ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); 2929c1379625SJustin T. Gibbs *used -= 2930c1379625SJustin T. Gibbs (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); 29313b2aab18SMatthew Ahrens *ref_rsrv = 29323b2aab18SMatthew Ahrens asize - MIN(asize, parent_delta(ds, asize + inflight)); 2933842727c2SChris Kirby } 2934842727c2SChris Kirby 29353b2aab18SMatthew Ahrens if (!check_quota || ds->ds_quota == 0) { 29363b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 29373b2aab18SMatthew Ahrens return (0); 2938842727c2SChris Kirby } 29393b2aab18SMatthew Ahrens /* 29403b2aab18SMatthew Ahrens * If they are requesting more space, and our current estimate 29413b2aab18SMatthew Ahrens * is over quota, they get to try again unless the actual 29423b2aab18SMatthew Ahrens * on-disk is over quota and there are no pending changes (which 29433b2aab18SMatthew Ahrens * may free up space for us). 29443b2aab18SMatthew Ahrens */ 2945c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= 2946c1379625SJustin T. Gibbs ds->ds_quota) { 29473b2aab18SMatthew Ahrens if (inflight > 0 || 2948c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) 2949be6fd75aSMatthew Ahrens error = SET_ERROR(ERESTART); 29503b2aab18SMatthew Ahrens else 2951be6fd75aSMatthew Ahrens error = SET_ERROR(EDQUOT); 2952842727c2SChris Kirby } 29533b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 2954842727c2SChris Kirby 2955842727c2SChris Kirby return (error); 2956842727c2SChris Kirby } 2957842727c2SChris Kirby 29583b2aab18SMatthew Ahrens typedef struct dsl_dataset_set_qr_arg { 29593b2aab18SMatthew Ahrens const char *ddsqra_name; 29603b2aab18SMatthew Ahrens zprop_source_t ddsqra_source; 29613b2aab18SMatthew Ahrens uint64_t ddsqra_value; 29623b2aab18SMatthew Ahrens } dsl_dataset_set_qr_arg_t; 2963842727c2SChris Kirby 29643b2aab18SMatthew Ahrens 29653b2aab18SMatthew Ahrens /* ARGSUSED */ 2966842727c2SChris Kirby static int 29673b2aab18SMatthew Ahrens dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) 2968842727c2SChris Kirby { 29693b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 29703b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 29713b2aab18SMatthew Ahrens dsl_dataset_t *ds; 2972842727c2SChris Kirby int error; 29733b2aab18SMatthew Ahrens uint64_t newval; 2974842727c2SChris Kirby 29753b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) 2976be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 2977842727c2SChris Kirby 29783b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); 29793b2aab18SMatthew Ahrens if (error != 0) 29803b2aab18SMatthew Ahrens return (error); 29813b2aab18SMatthew Ahrens 2982bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 29833b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2984be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2985842727c2SChris Kirby } 2986842727c2SChris Kirby 29873b2aab18SMatthew Ahrens error = dsl_prop_predict(ds->ds_dir, 29883b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 29893b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); 29903b2aab18SMatthew Ahrens if (error != 0) { 29913b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2992842727c2SChris Kirby return (error); 2993842727c2SChris Kirby } 2994842727c2SChris Kirby 29953b2aab18SMatthew Ahrens if (newval == 0) { 29963b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 29973b2aab18SMatthew Ahrens return (0); 29983b2aab18SMatthew Ahrens } 2999842727c2SChris Kirby 3000c1379625SJustin T. Gibbs if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || 30013b2aab18SMatthew Ahrens newval < ds->ds_reserved) { 30023b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3003be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 30043b2aab18SMatthew Ahrens } 30053b2aab18SMatthew Ahrens 30063b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3007842727c2SChris Kirby return (0); 3008842727c2SChris Kirby } 3009842727c2SChris Kirby 30103b2aab18SMatthew Ahrens static void 30113b2aab18SMatthew Ahrens dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) 3012842727c2SChris Kirby { 30133b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 30143b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 30153b2aab18SMatthew Ahrens dsl_dataset_t *ds; 30163b2aab18SMatthew Ahrens uint64_t newval; 3017842727c2SChris Kirby 30183b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); 3019842727c2SChris Kirby 30203b2aab18SMatthew Ahrens dsl_prop_set_sync_impl(ds, 30213b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 30223b2aab18SMatthew Ahrens ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, 30233b2aab18SMatthew Ahrens &ddsqra->ddsqra_value, tx); 3024842727c2SChris Kirby 30253b2aab18SMatthew Ahrens VERIFY0(dsl_prop_get_int_ds(ds, 30263b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); 3027842727c2SChris Kirby 30283b2aab18SMatthew Ahrens if (ds->ds_quota != newval) { 30293b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 30303b2aab18SMatthew Ahrens ds->ds_quota = newval; 3031842727c2SChris Kirby } 30323b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3033842727c2SChris Kirby } 3034842727c2SChris Kirby 30353b2aab18SMatthew Ahrens int 30363b2aab18SMatthew Ahrens dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, 30373b2aab18SMatthew Ahrens uint64_t refquota) 3038842727c2SChris Kirby { 30393b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t ddsqra; 3040842727c2SChris Kirby 30413b2aab18SMatthew Ahrens ddsqra.ddsqra_name = dsname; 30423b2aab18SMatthew Ahrens ddsqra.ddsqra_source = source; 30433b2aab18SMatthew Ahrens ddsqra.ddsqra_value = refquota; 30443b2aab18SMatthew Ahrens 30453b2aab18SMatthew Ahrens return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, 30467d46dc6cSMatthew Ahrens dsl_dataset_set_refquota_sync, &ddsqra, 0, ZFS_SPACE_CHECK_NONE)); 3047842727c2SChris Kirby } 3048842727c2SChris Kirby 3049842727c2SChris Kirby static int 30503b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) 3051842727c2SChris Kirby { 30523b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 30533b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 3054842727c2SChris Kirby dsl_dataset_t *ds; 3055842727c2SChris Kirby int error; 30563b2aab18SMatthew Ahrens uint64_t newval, unique; 3057d7747cbcSChris Kirby 30583b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) 3059be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 3060842727c2SChris Kirby 30613b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); 30623b2aab18SMatthew Ahrens if (error != 0) 3063842727c2SChris Kirby return (error); 3064842727c2SChris Kirby 3065bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 30663b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3067be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 3068842727c2SChris Kirby } 3069842727c2SChris Kirby 30703b2aab18SMatthew Ahrens error = dsl_prop_predict(ds->ds_dir, 30713b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 30723b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); 30733b2aab18SMatthew Ahrens if (error != 0) { 30743b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3075842727c2SChris Kirby return (error); 3076842727c2SChris Kirby } 3077842727c2SChris Kirby 30783b2aab18SMatthew Ahrens /* 30793b2aab18SMatthew Ahrens * If we are doing the preliminary check in open context, the 30803b2aab18SMatthew Ahrens * space estimates may be inaccurate. 30813b2aab18SMatthew Ahrens */ 30823b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) { 30833b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 30843b2aab18SMatthew Ahrens return (0); 3085842727c2SChris Kirby } 3086842727c2SChris Kirby 30873b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 30883b2aab18SMatthew Ahrens if (!DS_UNIQUE_IS_ACCURATE(ds)) 30893b2aab18SMatthew Ahrens dsl_dataset_recalc_head_uniq(ds); 3090c1379625SJustin T. Gibbs unique = dsl_dataset_phys(ds)->ds_unique_bytes; 30913b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 3092842727c2SChris Kirby 30933b2aab18SMatthew Ahrens if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { 30943b2aab18SMatthew Ahrens uint64_t delta = MAX(unique, newval) - 30953b2aab18SMatthew Ahrens MAX(unique, ds->ds_reserved); 3096842727c2SChris Kirby 30973b2aab18SMatthew Ahrens if (delta > 30983b2aab18SMatthew Ahrens dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || 30993b2aab18SMatthew Ahrens (ds->ds_quota > 0 && newval > ds->ds_quota)) { 31003b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3101be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 31023b2aab18SMatthew Ahrens } 3103842727c2SChris Kirby } 3104842727c2SChris Kirby 31053b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 31063b2aab18SMatthew Ahrens return (0); 3107842727c2SChris Kirby } 3108842727c2SChris Kirby 31093b2aab18SMatthew Ahrens void 31103b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, 31113b2aab18SMatthew Ahrens zprop_source_t source, uint64_t value, dmu_tx_t *tx) 3112ca45db41SChris Kirby { 31133b2aab18SMatthew Ahrens uint64_t newval; 31143b2aab18SMatthew Ahrens uint64_t unique; 31153b2aab18SMatthew Ahrens int64_t delta; 3116ca45db41SChris Kirby 31173b2aab18SMatthew Ahrens dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 31183b2aab18SMatthew Ahrens source, sizeof (value), 1, &value, tx); 3119ca45db41SChris Kirby 31203b2aab18SMatthew Ahrens VERIFY0(dsl_prop_get_int_ds(ds, 31213b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); 3122a7f53a56SChris Kirby 31233b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 31243b2aab18SMatthew Ahrens mutex_enter(&ds->ds_dir->dd_lock); 31253b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 31263b2aab18SMatthew Ahrens ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); 3127c1379625SJustin T. Gibbs unique = dsl_dataset_phys(ds)->ds_unique_bytes; 31283b2aab18SMatthew Ahrens delta = MAX(0, (int64_t)(newval - unique)) - 31293b2aab18SMatthew Ahrens MAX(0, (int64_t)(ds->ds_reserved - unique)); 31303b2aab18SMatthew Ahrens ds->ds_reserved = newval; 31313b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 3132a7f53a56SChris Kirby 31333b2aab18SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); 31343b2aab18SMatthew Ahrens mutex_exit(&ds->ds_dir->dd_lock); 3135ca45db41SChris Kirby } 3136ca45db41SChris Kirby 31373b2aab18SMatthew Ahrens static void 31383b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) 3139842727c2SChris Kirby { 31403b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 31413b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 3142842727c2SChris Kirby dsl_dataset_t *ds; 3143842727c2SChris Kirby 31443b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); 31453b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync_impl(ds, 31463b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); 3147842727c2SChris Kirby dsl_dataset_rele(ds, FTAG); 3148842727c2SChris Kirby } 3149503ad85cSMatthew Ahrens 3150503ad85cSMatthew Ahrens int 31513b2aab18SMatthew Ahrens dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, 31523b2aab18SMatthew Ahrens uint64_t refreservation) 3153503ad85cSMatthew Ahrens { 31543b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t ddsqra; 3155503ad85cSMatthew Ahrens 31563b2aab18SMatthew Ahrens ddsqra.ddsqra_name = dsname; 31573b2aab18SMatthew Ahrens ddsqra.ddsqra_source = source; 31583b2aab18SMatthew Ahrens ddsqra.ddsqra_value = refreservation; 31593b2aab18SMatthew Ahrens 31603b2aab18SMatthew Ahrens return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, 31617d46dc6cSMatthew Ahrens dsl_dataset_set_refreservation_sync, &ddsqra, 31627d46dc6cSMatthew Ahrens 0, ZFS_SPACE_CHECK_NONE)); 3163503ad85cSMatthew Ahrens } 316419b94df9SMatthew Ahrens 316519b94df9SMatthew Ahrens /* 316619b94df9SMatthew Ahrens * Return (in *usedp) the amount of space written in new that is not 316719b94df9SMatthew Ahrens * present in oldsnap. New may be a snapshot or the head. Old must be 316819b94df9SMatthew Ahrens * a snapshot before new, in new's filesystem (or its origin). If not then 316919b94df9SMatthew Ahrens * fail and return EINVAL. 317019b94df9SMatthew Ahrens * 317119b94df9SMatthew Ahrens * The written space is calculated by considering two components: First, we 317219b94df9SMatthew Ahrens * ignore any freed space, and calculate the written as new's used space 317319b94df9SMatthew Ahrens * minus old's used space. Next, we add in the amount of space that was freed 317419b94df9SMatthew Ahrens * between the two snapshots, thus reducing new's used space relative to old's. 317519b94df9SMatthew Ahrens * Specifically, this is the space that was born before old->ds_creation_txg, 317619b94df9SMatthew Ahrens * and freed before new (ie. on new's deadlist or a previous deadlist). 317719b94df9SMatthew Ahrens * 317819b94df9SMatthew Ahrens * space freed [---------------------] 317919b94df9SMatthew Ahrens * snapshots ---O-------O--------O-------O------ 318019b94df9SMatthew Ahrens * oldsnap new 318119b94df9SMatthew Ahrens */ 318219b94df9SMatthew Ahrens int 318319b94df9SMatthew Ahrens dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, 318419b94df9SMatthew Ahrens uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 318519b94df9SMatthew Ahrens { 318619b94df9SMatthew Ahrens int err = 0; 318719b94df9SMatthew Ahrens uint64_t snapobj; 318819b94df9SMatthew Ahrens dsl_pool_t *dp = new->ds_dir->dd_pool; 318919b94df9SMatthew Ahrens 31903b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 31913b2aab18SMatthew Ahrens 319219b94df9SMatthew Ahrens *usedp = 0; 3193c1379625SJustin T. Gibbs *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; 3194c1379625SJustin T. Gibbs *usedp -= dsl_dataset_phys(oldsnap)->ds_referenced_bytes; 319519b94df9SMatthew Ahrens 319619b94df9SMatthew Ahrens *compp = 0; 3197c1379625SJustin T. Gibbs *compp += dsl_dataset_phys(new)->ds_compressed_bytes; 3198c1379625SJustin T. Gibbs *compp -= dsl_dataset_phys(oldsnap)->ds_compressed_bytes; 319919b94df9SMatthew Ahrens 320019b94df9SMatthew Ahrens *uncompp = 0; 3201c1379625SJustin T. Gibbs *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; 3202c1379625SJustin T. Gibbs *uncompp -= dsl_dataset_phys(oldsnap)->ds_uncompressed_bytes; 320319b94df9SMatthew Ahrens 320419b94df9SMatthew Ahrens snapobj = new->ds_object; 320519b94df9SMatthew Ahrens while (snapobj != oldsnap->ds_object) { 320619b94df9SMatthew Ahrens dsl_dataset_t *snap; 320719b94df9SMatthew Ahrens uint64_t used, comp, uncomp; 320819b94df9SMatthew Ahrens 3209ad135b5dSChristopher Siden if (snapobj == new->ds_object) { 3210ad135b5dSChristopher Siden snap = new; 3211ad135b5dSChristopher Siden } else { 3212ad135b5dSChristopher Siden err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); 3213ad135b5dSChristopher Siden if (err != 0) 3214ad135b5dSChristopher Siden break; 3215ad135b5dSChristopher Siden } 321619b94df9SMatthew Ahrens 3217c1379625SJustin T. Gibbs if (dsl_dataset_phys(snap)->ds_prev_snap_txg == 3218c1379625SJustin T. Gibbs dsl_dataset_phys(oldsnap)->ds_creation_txg) { 321919b94df9SMatthew Ahrens /* 322019b94df9SMatthew Ahrens * The blocks in the deadlist can not be born after 322119b94df9SMatthew Ahrens * ds_prev_snap_txg, so get the whole deadlist space, 322219b94df9SMatthew Ahrens * which is more efficient (especially for old-format 322319b94df9SMatthew Ahrens * deadlists). Unfortunately the deadlist code 322419b94df9SMatthew Ahrens * doesn't have enough information to make this 322519b94df9SMatthew Ahrens * optimization itself. 322619b94df9SMatthew Ahrens */ 322719b94df9SMatthew Ahrens dsl_deadlist_space(&snap->ds_deadlist, 322819b94df9SMatthew Ahrens &used, &comp, &uncomp); 322919b94df9SMatthew Ahrens } else { 323019b94df9SMatthew Ahrens dsl_deadlist_space_range(&snap->ds_deadlist, 3231c1379625SJustin T. Gibbs 0, dsl_dataset_phys(oldsnap)->ds_creation_txg, 323219b94df9SMatthew Ahrens &used, &comp, &uncomp); 323319b94df9SMatthew Ahrens } 323419b94df9SMatthew Ahrens *usedp += used; 323519b94df9SMatthew Ahrens *compp += comp; 323619b94df9SMatthew Ahrens *uncompp += uncomp; 323719b94df9SMatthew Ahrens 323819b94df9SMatthew Ahrens /* 323919b94df9SMatthew Ahrens * If we get to the beginning of the chain of snapshots 324019b94df9SMatthew Ahrens * (ds_prev_snap_obj == 0) before oldsnap, then oldsnap 324119b94df9SMatthew Ahrens * was not a snapshot of/before new. 324219b94df9SMatthew Ahrens */ 3243c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 3244ad135b5dSChristopher Siden if (snap != new) 3245ad135b5dSChristopher Siden dsl_dataset_rele(snap, FTAG); 324619b94df9SMatthew Ahrens if (snapobj == 0) { 3247be6fd75aSMatthew Ahrens err = SET_ERROR(EINVAL); 324819b94df9SMatthew Ahrens break; 324919b94df9SMatthew Ahrens } 325019b94df9SMatthew Ahrens 325119b94df9SMatthew Ahrens } 325219b94df9SMatthew Ahrens return (err); 325319b94df9SMatthew Ahrens } 325419b94df9SMatthew Ahrens 325519b94df9SMatthew Ahrens /* 325619b94df9SMatthew Ahrens * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, 325719b94df9SMatthew Ahrens * lastsnap, and all snapshots in between are deleted. 325819b94df9SMatthew Ahrens * 325919b94df9SMatthew Ahrens * blocks that would be freed [---------------------------] 326019b94df9SMatthew Ahrens * snapshots ---O-------O--------O-------O--------O 326119b94df9SMatthew Ahrens * firstsnap lastsnap 326219b94df9SMatthew Ahrens * 326319b94df9SMatthew Ahrens * This is the set of blocks that were born after the snap before firstsnap, 326419b94df9SMatthew Ahrens * (birth > firstsnap->prev_snap_txg) and died before the snap after the 326519b94df9SMatthew Ahrens * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). 326619b94df9SMatthew Ahrens * We calculate this by iterating over the relevant deadlists (from the snap 326719b94df9SMatthew Ahrens * after lastsnap, backward to the snap after firstsnap), summing up the 326819b94df9SMatthew Ahrens * space on the deadlist that was born after the snap before firstsnap. 326919b94df9SMatthew Ahrens */ 327019b94df9SMatthew Ahrens int 327119b94df9SMatthew Ahrens dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, 327219b94df9SMatthew Ahrens dsl_dataset_t *lastsnap, 327319b94df9SMatthew Ahrens uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 327419b94df9SMatthew Ahrens { 327519b94df9SMatthew Ahrens int err = 0; 327619b94df9SMatthew Ahrens uint64_t snapobj; 327719b94df9SMatthew Ahrens dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; 327819b94df9SMatthew Ahrens 3279bc9014e6SJustin Gibbs ASSERT(firstsnap->ds_is_snapshot); 3280bc9014e6SJustin Gibbs ASSERT(lastsnap->ds_is_snapshot); 328119b94df9SMatthew Ahrens 328219b94df9SMatthew Ahrens /* 328319b94df9SMatthew Ahrens * Check that the snapshots are in the same dsl_dir, and firstsnap 328419b94df9SMatthew Ahrens * is before lastsnap. 328519b94df9SMatthew Ahrens */ 328619b94df9SMatthew Ahrens if (firstsnap->ds_dir != lastsnap->ds_dir || 3287c1379625SJustin T. Gibbs dsl_dataset_phys(firstsnap)->ds_creation_txg > 3288c1379625SJustin T. Gibbs dsl_dataset_phys(lastsnap)->ds_creation_txg) 3289be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 329019b94df9SMatthew Ahrens 329119b94df9SMatthew Ahrens *usedp = *compp = *uncompp = 0; 329219b94df9SMatthew Ahrens 3293c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; 329419b94df9SMatthew Ahrens while (snapobj != firstsnap->ds_object) { 329519b94df9SMatthew Ahrens dsl_dataset_t *ds; 329619b94df9SMatthew Ahrens uint64_t used, comp, uncomp; 329719b94df9SMatthew Ahrens 329819b94df9SMatthew Ahrens err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); 329919b94df9SMatthew Ahrens if (err != 0) 330019b94df9SMatthew Ahrens break; 330119b94df9SMatthew Ahrens 330219b94df9SMatthew Ahrens dsl_deadlist_space_range(&ds->ds_deadlist, 3303c1379625SJustin T. Gibbs dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, 330419b94df9SMatthew Ahrens &used, &comp, &uncomp); 330519b94df9SMatthew Ahrens *usedp += used; 330619b94df9SMatthew Ahrens *compp += comp; 330719b94df9SMatthew Ahrens *uncompp += uncomp; 330819b94df9SMatthew Ahrens 3309c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 331019b94df9SMatthew Ahrens ASSERT3U(snapobj, !=, 0); 331119b94df9SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 331219b94df9SMatthew Ahrens } 331319b94df9SMatthew Ahrens return (err); 331419b94df9SMatthew Ahrens } 33153b2aab18SMatthew Ahrens 33163b2aab18SMatthew Ahrens /* 33173b2aab18SMatthew Ahrens * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. 33183b2aab18SMatthew Ahrens * For example, they could both be snapshots of the same filesystem, and 33193b2aab18SMatthew Ahrens * 'earlier' is before 'later'. Or 'earlier' could be the origin of 33203b2aab18SMatthew Ahrens * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's 33213b2aab18SMatthew Ahrens * filesystem. Or 'earlier' could be the origin's origin. 332278f17100SMatthew Ahrens * 332378f17100SMatthew Ahrens * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. 33243b2aab18SMatthew Ahrens */ 33253b2aab18SMatthew Ahrens boolean_t 332678f17100SMatthew Ahrens dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, 332778f17100SMatthew Ahrens uint64_t earlier_txg) 33283b2aab18SMatthew Ahrens { 33293b2aab18SMatthew Ahrens dsl_pool_t *dp = later->ds_dir->dd_pool; 33303b2aab18SMatthew Ahrens int error; 33313b2aab18SMatthew Ahrens boolean_t ret; 33323b2aab18SMatthew Ahrens 33333b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 3334bc9014e6SJustin Gibbs ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); 333578f17100SMatthew Ahrens 333678f17100SMatthew Ahrens if (earlier_txg == 0) 3337c1379625SJustin T. Gibbs earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; 33383b2aab18SMatthew Ahrens 3339bc9014e6SJustin Gibbs if (later->ds_is_snapshot && 3340c1379625SJustin T. Gibbs earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) 33413b2aab18SMatthew Ahrens return (B_FALSE); 33423b2aab18SMatthew Ahrens 33433b2aab18SMatthew Ahrens if (later->ds_dir == earlier->ds_dir) 33443b2aab18SMatthew Ahrens return (B_TRUE); 33453b2aab18SMatthew Ahrens if (!dsl_dir_is_clone(later->ds_dir)) 33463b2aab18SMatthew Ahrens return (B_FALSE); 33473b2aab18SMatthew Ahrens 3348c1379625SJustin T. Gibbs if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == earlier->ds_object) 33493b2aab18SMatthew Ahrens return (B_TRUE); 33503b2aab18SMatthew Ahrens dsl_dataset_t *origin; 33513b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, 3352c1379625SJustin T. Gibbs dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); 33533b2aab18SMatthew Ahrens if (error != 0) 33543b2aab18SMatthew Ahrens return (B_FALSE); 335578f17100SMatthew Ahrens ret = dsl_dataset_is_before(origin, earlier, earlier_txg); 33563b2aab18SMatthew Ahrens dsl_dataset_rele(origin, FTAG); 33573b2aab18SMatthew Ahrens return (ret); 33583b2aab18SMatthew Ahrens } 33592acef22dSMatthew Ahrens 33602acef22dSMatthew Ahrens void 33612acef22dSMatthew Ahrens dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) 33622acef22dSMatthew Ahrens { 33632acef22dSMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 33642acef22dSMatthew Ahrens dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); 33652acef22dSMatthew Ahrens } 3366