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. 27*c3d26abcSMatthew Ahrens * Copyright (c) 2014 Integros [integros.com] 28fa9e4066Sahrens */ 29fa9e4066Sahrens 30fa9e4066Sahrens #include <sys/dmu_objset.h> 31fa9e4066Sahrens #include <sys/dsl_dataset.h> 32fa9e4066Sahrens #include <sys/dsl_dir.h> 3399653d4eSeschrock #include <sys/dsl_prop.h> 341d452cf5Sahrens #include <sys/dsl_synctask.h> 35fa9e4066Sahrens #include <sys/dmu_traverse.h> 364e3c9f44SBill Pijewski #include <sys/dmu_impl.h> 37fa9e4066Sahrens #include <sys/dmu_tx.h> 38fa9e4066Sahrens #include <sys/arc.h> 39fa9e4066Sahrens #include <sys/zio.h> 40fa9e4066Sahrens #include <sys/zap.h> 41ad135b5dSChristopher Siden #include <sys/zfeature.h> 42fa9e4066Sahrens #include <sys/unique.h> 43fa9e4066Sahrens #include <sys/zfs_context.h> 44cdf5b4caSmmusante #include <sys/zfs_ioctl.h> 45ecd6cf80Smarks #include <sys/spa.h> 46088f3894Sahrens #include <sys/zfs_znode.h> 47c99e4bdcSChris Kirby #include <sys/zfs_onexit.h> 48842727c2SChris Kirby #include <sys/zvol.h> 493f9d6ad7SLin Ling #include <sys/dsl_scan.h> 50cde58dbcSMatthew Ahrens #include <sys/dsl_deadlist.h> 513b2aab18SMatthew Ahrens #include <sys/dsl_destroy.h> 523b2aab18SMatthew Ahrens #include <sys/dsl_userhold.h> 5378f17100SMatthew Ahrens #include <sys/dsl_bookmark.h> 5445818ee1SMatthew Ahrens #include <sys/dmu_send.h> 5545818ee1SMatthew Ahrens #include <sys/zio_checksum.h> 569c3fd121SMatthew Ahrens #include <sys/zio_compress.h> 579c3fd121SMatthew Ahrens #include <zfs_fletcher.h> 58e1930233Sbonwick 59b5152584SMatthew Ahrens /* 60b5152584SMatthew Ahrens * The SPA supports block sizes up to 16MB. However, very large blocks 61b5152584SMatthew Ahrens * can have an impact on i/o latency (e.g. tying up a spinning disk for 62b5152584SMatthew Ahrens * ~300ms), and also potentially on the memory allocator. Therefore, 63b5152584SMatthew Ahrens * we do not allow the recordsize to be set larger than zfs_max_recordsize 64b5152584SMatthew Ahrens * (default 1MB). Larger blocks can be created by changing this tunable, 65b5152584SMatthew Ahrens * and pools with larger blocks can always be imported and used, regardless 66b5152584SMatthew Ahrens * of this setting. 67b5152584SMatthew Ahrens */ 68b5152584SMatthew Ahrens int zfs_max_recordsize = 1 * 1024 * 1024; 69b5152584SMatthew Ahrens 70cde58dbcSMatthew Ahrens #define SWITCH64(x, y) \ 71cde58dbcSMatthew Ahrens { \ 72cde58dbcSMatthew Ahrens uint64_t __tmp = (x); \ 73cde58dbcSMatthew Ahrens (x) = (y); \ 74cde58dbcSMatthew Ahrens (y) = __tmp; \ 75cde58dbcSMatthew Ahrens } 76cde58dbcSMatthew Ahrens 7755434c77Sek #define DS_REF_MAX (1ULL << 62) 78fa9e4066Sahrens 79c1379625SJustin T. Gibbs extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); 80c1379625SJustin T. Gibbs 81a9799022Sck /* 82a9799022Sck * Figure out how much of this delta should be propogated to the dsl_dir 83a9799022Sck * layer. If there's a refreservation, that space has already been 84a9799022Sck * partially accounted for in our ancestors. 85a9799022Sck */ 86a9799022Sck static int64_t 87a9799022Sck parent_delta(dsl_dataset_t *ds, int64_t delta) 88a9799022Sck { 89c1379625SJustin T. Gibbs dsl_dataset_phys_t *ds_phys; 90a9799022Sck uint64_t old_bytes, new_bytes; 91a9799022Sck 92a9799022Sck if (ds->ds_reserved == 0) 93a9799022Sck return (delta); 94a9799022Sck 95c1379625SJustin T. Gibbs ds_phys = dsl_dataset_phys(ds); 96c1379625SJustin T. Gibbs old_bytes = MAX(ds_phys->ds_unique_bytes, ds->ds_reserved); 97c1379625SJustin T. Gibbs new_bytes = MAX(ds_phys->ds_unique_bytes + delta, ds->ds_reserved); 98a9799022Sck 99a9799022Sck ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); 100a9799022Sck return (new_bytes - old_bytes); 101a9799022Sck } 102fa9e4066Sahrens 103fa9e4066Sahrens void 104b24ab676SJeff Bonwick dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) 105fa9e4066Sahrens { 106b24ab676SJeff Bonwick int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); 107fa9e4066Sahrens int compressed = BP_GET_PSIZE(bp); 108fa9e4066Sahrens int uncompressed = BP_GET_UCSIZE(bp); 109a9799022Sck int64_t delta; 110fa9e4066Sahrens 1113f9d6ad7SLin Ling dprintf_bp(bp, "ds=%p", ds); 112fa9e4066Sahrens 113fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 114fa9e4066Sahrens /* It could have been compressed away to nothing */ 115fa9e4066Sahrens if (BP_IS_HOLE(bp)) 116fa9e4066Sahrens return; 117fa9e4066Sahrens ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); 118ad135b5dSChristopher Siden ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp))); 119fa9e4066Sahrens if (ds == NULL) { 120ce636f8bSMatthew Ahrens dsl_pool_mos_diduse_space(tx->tx_pool, 121ce636f8bSMatthew Ahrens used, compressed, uncompressed); 122fa9e4066Sahrens return; 123fa9e4066Sahrens } 1243f9d6ad7SLin Ling 125b62969f8SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 126fa9e4066Sahrens mutex_enter(&ds->ds_lock); 127a9799022Sck delta = parent_delta(ds, used); 128c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes += used; 129c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; 130c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; 131c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes += used; 13245818ee1SMatthew Ahrens 133ca0cc391SMatthew Ahrens if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) { 134ca0cc391SMatthew Ahrens ds->ds_feature_activation_needed[SPA_FEATURE_LARGE_BLOCKS] = 135ca0cc391SMatthew Ahrens B_TRUE; 136ca0cc391SMatthew Ahrens } 13745818ee1SMatthew Ahrens 13845818ee1SMatthew Ahrens spa_feature_t f = zio_checksum_to_feature(BP_GET_CHECKSUM(bp)); 13945818ee1SMatthew Ahrens if (f != SPA_FEATURE_NONE) 14045818ee1SMatthew Ahrens ds->ds_feature_activation_needed[f] = B_TRUE; 14145818ee1SMatthew Ahrens 142fa9e4066Sahrens mutex_exit(&ds->ds_lock); 14374e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, 14474e7dc98SMatthew Ahrens compressed, uncompressed, tx); 14574e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, used - delta, 14674e7dc98SMatthew Ahrens DD_USED_REFRSRV, DD_USED_HEAD, tx); 147fa9e4066Sahrens } 148fa9e4066Sahrens 149cdb0ab79Smaybee int 150b24ab676SJeff Bonwick dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, 151b24ab676SJeff Bonwick boolean_t async) 152fa9e4066Sahrens { 15343466aaeSMax Grossman int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); 15443466aaeSMax Grossman int compressed = BP_GET_PSIZE(bp); 15543466aaeSMax Grossman int uncompressed = BP_GET_UCSIZE(bp); 15643466aaeSMax Grossman 157fa9e4066Sahrens if (BP_IS_HOLE(bp)) 158cdb0ab79Smaybee return (0); 159fa9e4066Sahrens 160b24ab676SJeff Bonwick ASSERT(dmu_tx_is_syncing(tx)); 161b24ab676SJeff Bonwick ASSERT(bp->blk_birth <= tx->tx_txg); 162b24ab676SJeff Bonwick 163fa9e4066Sahrens if (ds == NULL) { 164b24ab676SJeff Bonwick dsl_free(tx->tx_pool, tx->tx_txg, bp); 165ce636f8bSMatthew Ahrens dsl_pool_mos_diduse_space(tx->tx_pool, 166ce636f8bSMatthew Ahrens -used, -compressed, -uncompressed); 167cdb0ab79Smaybee return (used); 168fa9e4066Sahrens } 169fa9e4066Sahrens ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); 170fa9e4066Sahrens 171bc9014e6SJustin Gibbs ASSERT(!ds->ds_is_snapshot); 172fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 173fa9e4066Sahrens 174c1379625SJustin T. Gibbs if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { 175a9799022Sck int64_t delta; 176c717a561Smaybee 1773f9d6ad7SLin Ling dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); 178b24ab676SJeff Bonwick dsl_free(tx->tx_pool, tx->tx_txg, bp); 179fa9e4066Sahrens 180fa9e4066Sahrens mutex_enter(&ds->ds_lock); 181c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || 182a9799022Sck !DS_UNIQUE_IS_ACCURATE(ds)); 183a9799022Sck delta = parent_delta(ds, -used); 184c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes -= used; 185fa9e4066Sahrens mutex_exit(&ds->ds_lock); 18674e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, 187a9799022Sck delta, -compressed, -uncompressed, tx); 18874e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, -used - delta, 18974e7dc98SMatthew Ahrens DD_USED_REFRSRV, DD_USED_HEAD, tx); 190fa9e4066Sahrens } else { 191fa9e4066Sahrens dprintf_bp(bp, "putting on dead list: %s", ""); 192b24ab676SJeff Bonwick if (async) { 193b24ab676SJeff Bonwick /* 194b24ab676SJeff Bonwick * We are here as part of zio's write done callback, 195b24ab676SJeff Bonwick * which means we're a zio interrupt thread. We can't 196cde58dbcSMatthew Ahrens * call dsl_deadlist_insert() now because it may block 197b24ab676SJeff Bonwick * waiting for I/O. Instead, put bp on the deferred 198b24ab676SJeff Bonwick * queue and let dsl_pool_sync() finish the job. 199b24ab676SJeff Bonwick */ 200cde58dbcSMatthew Ahrens bplist_append(&ds->ds_pending_deadlist, bp); 201b24ab676SJeff Bonwick } else { 202cde58dbcSMatthew Ahrens dsl_deadlist_insert(&ds->ds_deadlist, bp, tx); 203b24ab676SJeff Bonwick } 204a4611edeSahrens ASSERT3U(ds->ds_prev->ds_object, ==, 205c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj); 206c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); 207fa9e4066Sahrens /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ 208c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 209a4611edeSahrens ds->ds_object && bp->blk_birth > 210c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { 211a4611edeSahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 212a4611edeSahrens mutex_enter(&ds->ds_prev->ds_lock); 213c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; 214a4611edeSahrens mutex_exit(&ds->ds_prev->ds_lock); 215fa9e4066Sahrens } 2163f9d6ad7SLin Ling if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { 21774e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, used, 21874e7dc98SMatthew Ahrens DD_USED_HEAD, DD_USED_SNAP, tx); 21974e7dc98SMatthew Ahrens } 220fa9e4066Sahrens } 221fa9e4066Sahrens mutex_enter(&ds->ds_lock); 222c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); 223c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes -= used; 224c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); 225c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; 226c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); 227c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; 228fa9e4066Sahrens mutex_exit(&ds->ds_lock); 229cdb0ab79Smaybee 230cdb0ab79Smaybee return (used); 231fa9e4066Sahrens } 232fa9e4066Sahrens 233ea8dc4b6Seschrock uint64_t 234ea8dc4b6Seschrock dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) 235fa9e4066Sahrens { 236a2eea2e1Sahrens uint64_t trysnap = 0; 237a2eea2e1Sahrens 238fa9e4066Sahrens if (ds == NULL) 239ea8dc4b6Seschrock return (0); 240fa9e4066Sahrens /* 241fa9e4066Sahrens * The snapshot creation could fail, but that would cause an 242fa9e4066Sahrens * incorrect FALSE return, which would only result in an 243fa9e4066Sahrens * overestimation of the amount of space that an operation would 244fa9e4066Sahrens * consume, which is OK. 245fa9e4066Sahrens * 246fa9e4066Sahrens * There's also a small window where we could miss a pending 247fa9e4066Sahrens * snapshot, because we could set the sync task in the quiescing 248fa9e4066Sahrens * phase. So this should only be used as a guess. 249fa9e4066Sahrens */ 250a2eea2e1Sahrens if (ds->ds_trysnap_txg > 251a2eea2e1Sahrens spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) 252a2eea2e1Sahrens trysnap = ds->ds_trysnap_txg; 253c1379625SJustin T. Gibbs return (MAX(dsl_dataset_phys(ds)->ds_prev_snap_txg, trysnap)); 254ea8dc4b6Seschrock } 255ea8dc4b6Seschrock 2563d692628SSanjeev Bagewadi boolean_t 257c7cd2421SGeorge Wilson dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp, 258c7cd2421SGeorge Wilson uint64_t blk_birth) 259ea8dc4b6Seschrock { 26043466aaeSMax Grossman if (blk_birth <= dsl_dataset_prev_snap_txg(ds) || 26143466aaeSMax Grossman (bp != NULL && BP_IS_HOLE(bp))) 262c7cd2421SGeorge Wilson return (B_FALSE); 263c7cd2421SGeorge Wilson 264837b568bSGeorge Wilson ddt_prefetch(dsl_dataset_get_spa(ds), bp); 265c7cd2421SGeorge Wilson 266c7cd2421SGeorge Wilson return (B_TRUE); 267fa9e4066Sahrens } 268fa9e4066Sahrens 269fa9e4066Sahrens static void 270bc9014e6SJustin Gibbs dsl_dataset_evict(void *dbu) 271fa9e4066Sahrens { 272bc9014e6SJustin Gibbs dsl_dataset_t *ds = dbu; 273fa9e4066Sahrens 2743b2aab18SMatthew Ahrens ASSERT(ds->ds_owner == NULL); 275fa9e4066Sahrens 276bc9014e6SJustin Gibbs ds->ds_dbuf = NULL; 277bc9014e6SJustin Gibbs 27891ebeef5Sahrens unique_remove(ds->ds_fsid_guid); 279fa9e4066Sahrens 280503ad85cSMatthew Ahrens if (ds->ds_objset != NULL) 281503ad85cSMatthew Ahrens dmu_objset_evict(ds->ds_objset); 282fa9e4066Sahrens 283fa9e4066Sahrens if (ds->ds_prev) { 2843b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 285fa9e4066Sahrens ds->ds_prev = NULL; 286fa9e4066Sahrens } 287fa9e4066Sahrens 288cde58dbcSMatthew Ahrens bplist_destroy(&ds->ds_pending_deadlist); 289bc9014e6SJustin Gibbs if (ds->ds_deadlist.dl_os != NULL) 290cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 291745cd3c5Smaybee if (ds->ds_dir) 292bc9014e6SJustin Gibbs dsl_dir_async_rele(ds->ds_dir, ds); 293fa9e4066Sahrens 29491ebeef5Sahrens ASSERT(!list_link_active(&ds->ds_synced_link)); 295fa9e4066Sahrens 29603bad06fSJustin Gibbs list_destroy(&ds->ds_prop_cbs); 2975ad82045Snd mutex_destroy(&ds->ds_lock); 29891ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 299d2b3cbbdSJorgen Lundman mutex_destroy(&ds->ds_sendstream_lock); 3003b2aab18SMatthew Ahrens refcount_destroy(&ds->ds_longholds); 3015ad82045Snd 302fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 303fa9e4066Sahrens } 304fa9e4066Sahrens 3053b2aab18SMatthew Ahrens int 306fa9e4066Sahrens dsl_dataset_get_snapname(dsl_dataset_t *ds) 307fa9e4066Sahrens { 308fa9e4066Sahrens dsl_dataset_phys_t *headphys; 309fa9e4066Sahrens int err; 310fa9e4066Sahrens dmu_buf_t *headdbuf; 311fa9e4066Sahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 312fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 313fa9e4066Sahrens 314fa9e4066Sahrens if (ds->ds_snapname[0]) 315ea8dc4b6Seschrock return (0); 316c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) 317ea8dc4b6Seschrock return (0); 318fa9e4066Sahrens 319c1379625SJustin T. Gibbs err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, 320ea8dc4b6Seschrock FTAG, &headdbuf); 3213b2aab18SMatthew Ahrens if (err != 0) 322ea8dc4b6Seschrock return (err); 323fa9e4066Sahrens headphys = headdbuf->db_data; 324fa9e4066Sahrens err = zap_value_search(dp->dp_meta_objset, 325e7437265Sahrens headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); 326ea8dc4b6Seschrock dmu_buf_rele(headdbuf, FTAG); 327ea8dc4b6Seschrock return (err); 328fa9e4066Sahrens } 329fa9e4066Sahrens 3303b2aab18SMatthew Ahrens int 331745cd3c5Smaybee dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) 332ab04eb8eStimh { 333745cd3c5Smaybee objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 334c1379625SJustin T. Gibbs uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 335ab04eb8eStimh matchtype_t mt; 336ab04eb8eStimh int err; 337ab04eb8eStimh 338c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) 339ab04eb8eStimh mt = MT_FIRST; 340ab04eb8eStimh else 341ab04eb8eStimh mt = MT_EXACT; 342ab04eb8eStimh 343745cd3c5Smaybee err = zap_lookup_norm(mos, snapobj, name, 8, 1, 344ab04eb8eStimh value, mt, NULL, 0, NULL); 345ab04eb8eStimh if (err == ENOTSUP && mt == MT_FIRST) 346745cd3c5Smaybee err = zap_lookup(mos, snapobj, name, 8, 1, value); 347ab04eb8eStimh return (err); 348ab04eb8eStimh } 349ab04eb8eStimh 3503b2aab18SMatthew Ahrens int 351a2afb611SJerry Jelinek dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, 352a2afb611SJerry Jelinek boolean_t adj_cnt) 353ab04eb8eStimh { 354745cd3c5Smaybee objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 355c1379625SJustin T. Gibbs uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 356ab04eb8eStimh matchtype_t mt; 357ab04eb8eStimh int err; 358ab04eb8eStimh 35971eb0538SChris Kirby dsl_dir_snap_cmtime_update(ds->ds_dir); 36071eb0538SChris Kirby 361c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) 362ab04eb8eStimh mt = MT_FIRST; 363ab04eb8eStimh else 364ab04eb8eStimh mt = MT_EXACT; 365ab04eb8eStimh 366745cd3c5Smaybee err = zap_remove_norm(mos, snapobj, name, mt, tx); 367ab04eb8eStimh if (err == ENOTSUP && mt == MT_FIRST) 368745cd3c5Smaybee err = zap_remove(mos, snapobj, name, tx); 369a2afb611SJerry Jelinek 370a2afb611SJerry Jelinek if (err == 0 && adj_cnt) 371a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(ds->ds_dir, -1, 372a2afb611SJerry Jelinek DD_FIELD_SNAPSHOT_COUNT, tx); 373a2afb611SJerry Jelinek 374ab04eb8eStimh return (err); 375ab04eb8eStimh } 376ab04eb8eStimh 377e57a022bSJustin T. Gibbs boolean_t 378e57a022bSJustin T. Gibbs dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) 379e57a022bSJustin T. Gibbs { 3809d47dec0SJustin T. Gibbs dmu_buf_t *dbuf = ds->ds_dbuf; 3819d47dec0SJustin T. Gibbs boolean_t result = B_FALSE; 3829d47dec0SJustin T. Gibbs 3839d47dec0SJustin T. Gibbs if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, 3849d47dec0SJustin T. Gibbs ds->ds_object, DMU_BONUS_BLKID, tag)) { 3859d47dec0SJustin T. Gibbs 3869d47dec0SJustin T. Gibbs if (ds == dmu_buf_get_user(dbuf)) 3879d47dec0SJustin T. Gibbs result = B_TRUE; 3889d47dec0SJustin T. Gibbs else 3899d47dec0SJustin T. Gibbs dmu_buf_rele(dbuf, tag); 3909d47dec0SJustin T. Gibbs } 3919d47dec0SJustin T. Gibbs 3929d47dec0SJustin T. Gibbs return (result); 393e57a022bSJustin T. Gibbs } 394e57a022bSJustin T. Gibbs 3953b2aab18SMatthew Ahrens int 3963b2aab18SMatthew Ahrens dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, 397745cd3c5Smaybee dsl_dataset_t **dsp) 398fa9e4066Sahrens { 399fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 400fa9e4066Sahrens dmu_buf_t *dbuf; 401fa9e4066Sahrens dsl_dataset_t *ds; 402ea8dc4b6Seschrock int err; 403a7f53a56SChris Kirby dmu_object_info_t doi; 404fa9e4066Sahrens 4053b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 406fa9e4066Sahrens 407ea8dc4b6Seschrock err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); 4083b2aab18SMatthew Ahrens if (err != 0) 409ea8dc4b6Seschrock return (err); 410a7f53a56SChris Kirby 411a7f53a56SChris Kirby /* Make sure dsobj has the correct object type. */ 412a7f53a56SChris Kirby dmu_object_info_from_db(dbuf, &doi); 4132acef22dSMatthew Ahrens if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { 414b287be1bSWill Andrews dmu_buf_rele(dbuf, tag); 415be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 416b287be1bSWill Andrews } 417a7f53a56SChris Kirby 418fa9e4066Sahrens ds = dmu_buf_get_user(dbuf); 419fa9e4066Sahrens if (ds == NULL) { 420d5285caeSGeorge Wilson dsl_dataset_t *winner = NULL; 421fa9e4066Sahrens 422fa9e4066Sahrens ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); 423fa9e4066Sahrens ds->ds_dbuf = dbuf; 424fa9e4066Sahrens ds->ds_object = dsobj; 425bc9014e6SJustin Gibbs ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; 426fa9e4066Sahrens 4275ad82045Snd mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); 42891ebeef5Sahrens mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); 4294e3c9f44SBill Pijewski mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); 4303b2aab18SMatthew Ahrens refcount_create(&ds->ds_longholds); 4315ad82045Snd 432cde58dbcSMatthew Ahrens bplist_create(&ds->ds_pending_deadlist); 433cde58dbcSMatthew Ahrens dsl_deadlist_open(&ds->ds_deadlist, 434c1379625SJustin T. Gibbs mos, dsl_dataset_phys(ds)->ds_deadlist_obj); 435cde58dbcSMatthew Ahrens 4364e3c9f44SBill Pijewski list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), 4374e3c9f44SBill Pijewski offsetof(dmu_sendarg_t, dsa_link)); 4384e3c9f44SBill Pijewski 43903bad06fSJustin Gibbs list_create(&ds->ds_prop_cbs, sizeof (dsl_prop_cb_record_t), 44003bad06fSJustin Gibbs offsetof(dsl_prop_cb_record_t, cbr_ds_node)); 44103bad06fSJustin Gibbs 442b5152584SMatthew Ahrens if (doi.doi_type == DMU_OTN_ZAP_METADATA) { 443ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 444ca0cc391SMatthew Ahrens if (!(spa_feature_table[f].fi_flags & 445ca0cc391SMatthew Ahrens ZFEATURE_FLAG_PER_DATASET)) 446ca0cc391SMatthew Ahrens continue; 447ca0cc391SMatthew Ahrens err = zap_contains(mos, dsobj, 448ca0cc391SMatthew Ahrens spa_feature_table[f].fi_guid); 449ca0cc391SMatthew Ahrens if (err == 0) { 450ca0cc391SMatthew Ahrens ds->ds_feature_inuse[f] = B_TRUE; 451ca0cc391SMatthew Ahrens } else { 452ca0cc391SMatthew Ahrens ASSERT3U(err, ==, ENOENT); 453ca0cc391SMatthew Ahrens err = 0; 454ca0cc391SMatthew Ahrens } 455e1f3c208SJustin T. Gibbs } 456b5152584SMatthew Ahrens } 457b5152584SMatthew Ahrens 458ca0cc391SMatthew Ahrens err = dsl_dir_hold_obj(dp, 459ca0cc391SMatthew Ahrens dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds, &ds->ds_dir); 4603b2aab18SMatthew Ahrens if (err != 0) { 4615ad82045Snd mutex_destroy(&ds->ds_lock); 46291ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 463d2b3cbbdSJorgen Lundman mutex_destroy(&ds->ds_sendstream_lock); 4643b2aab18SMatthew Ahrens refcount_destroy(&ds->ds_longholds); 465cde58dbcSMatthew Ahrens bplist_destroy(&ds->ds_pending_deadlist); 466cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 467ea8dc4b6Seschrock kmem_free(ds, sizeof (dsl_dataset_t)); 468ea8dc4b6Seschrock dmu_buf_rele(dbuf, tag); 469ea8dc4b6Seschrock return (err); 470ea8dc4b6Seschrock } 471fa9e4066Sahrens 472bc9014e6SJustin Gibbs if (!ds->ds_is_snapshot) { 473fa9e4066Sahrens ds->ds_snapname[0] = '\0'; 474c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { 4753b2aab18SMatthew Ahrens err = dsl_dataset_hold_obj(dp, 476c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, 477745cd3c5Smaybee ds, &ds->ds_prev); 478fa9e4066Sahrens } 47978f17100SMatthew Ahrens if (doi.doi_type == DMU_OTN_ZAP_METADATA) { 48078f17100SMatthew Ahrens int zaperr = zap_lookup(mos, ds->ds_object, 48178f17100SMatthew Ahrens DS_FIELD_BOOKMARK_NAMES, 48278f17100SMatthew Ahrens sizeof (ds->ds_bookmarks), 1, 48378f17100SMatthew Ahrens &ds->ds_bookmarks); 48478f17100SMatthew Ahrens if (zaperr != ENOENT) 48578f17100SMatthew Ahrens VERIFY0(zaperr); 48678f17100SMatthew Ahrens } 487842727c2SChris Kirby } else { 488842727c2SChris Kirby if (zfs_flags & ZFS_DEBUG_SNAPNAMES) 489842727c2SChris Kirby err = dsl_dataset_get_snapname(ds); 490c1379625SJustin T. Gibbs if (err == 0 && 491c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { 492842727c2SChris Kirby err = zap_count( 493842727c2SChris Kirby ds->ds_dir->dd_pool->dp_meta_objset, 494c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_userrefs_obj, 495842727c2SChris Kirby &ds->ds_userrefs); 496842727c2SChris Kirby } 497fa9e4066Sahrens } 498fa9e4066Sahrens 499bc9014e6SJustin Gibbs if (err == 0 && !ds->ds_is_snapshot) { 5003b2aab18SMatthew Ahrens err = dsl_prop_get_int_ds(ds, 5013b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 5023b2aab18SMatthew Ahrens &ds->ds_reserved); 503cb625fb5Sck if (err == 0) { 5043b2aab18SMatthew Ahrens err = dsl_prop_get_int_ds(ds, 5053b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 5063b2aab18SMatthew Ahrens &ds->ds_quota); 507cb625fb5Sck } 508cb625fb5Sck } else { 509cb625fb5Sck ds->ds_reserved = ds->ds_quota = 0; 510cb625fb5Sck } 511cb625fb5Sck 512bc9014e6SJustin Gibbs dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict, &ds->ds_dbuf); 513bc9014e6SJustin Gibbs if (err == 0) 514bc9014e6SJustin Gibbs winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); 515bc9014e6SJustin Gibbs 516bc9014e6SJustin Gibbs if (err != 0 || winner != NULL) { 517cde58dbcSMatthew Ahrens bplist_destroy(&ds->ds_pending_deadlist); 518cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 519745cd3c5Smaybee if (ds->ds_prev) 5203b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 5213b2aab18SMatthew Ahrens dsl_dir_rele(ds->ds_dir, ds); 5225ad82045Snd mutex_destroy(&ds->ds_lock); 52391ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 524d2b3cbbdSJorgen Lundman mutex_destroy(&ds->ds_sendstream_lock); 5253b2aab18SMatthew Ahrens refcount_destroy(&ds->ds_longholds); 526fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 5273b2aab18SMatthew Ahrens if (err != 0) { 528ea8dc4b6Seschrock dmu_buf_rele(dbuf, tag); 529ea8dc4b6Seschrock return (err); 530ea8dc4b6Seschrock } 531fa9e4066Sahrens ds = winner; 532fa9e4066Sahrens } else { 53391ebeef5Sahrens ds->ds_fsid_guid = 534c1379625SJustin T. Gibbs unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); 535fa9e4066Sahrens } 536fa9e4066Sahrens } 537fa9e4066Sahrens ASSERT3P(ds->ds_dbuf, ==, dbuf); 538c1379625SJustin T. Gibbs ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); 539c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || 540afc6333aSahrens spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || 54184db2a68Sahrens dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); 542ea8dc4b6Seschrock *dsp = ds; 543ea8dc4b6Seschrock return (0); 544fa9e4066Sahrens } 545fa9e4066Sahrens 546745cd3c5Smaybee int 5473b2aab18SMatthew Ahrens dsl_dataset_hold(dsl_pool_t *dp, const char *name, 548503ad85cSMatthew Ahrens void *tag, dsl_dataset_t **dsp) 549fa9e4066Sahrens { 550fa9e4066Sahrens dsl_dir_t *dd; 551745cd3c5Smaybee const char *snapname; 552fa9e4066Sahrens uint64_t obj; 553fa9e4066Sahrens int err = 0; 554a2cdcdd2SPaul Dagnelie dsl_dataset_t *ds; 555fa9e4066Sahrens 5563b2aab18SMatthew Ahrens err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); 5573b2aab18SMatthew Ahrens if (err != 0) 558ea8dc4b6Seschrock return (err); 559fa9e4066Sahrens 5603b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 561c1379625SJustin T. Gibbs obj = dsl_dir_phys(dd)->dd_head_dataset_obj; 5623b2aab18SMatthew Ahrens if (obj != 0) 563a2cdcdd2SPaul Dagnelie err = dsl_dataset_hold_obj(dp, obj, tag, &ds); 564745cd3c5Smaybee else 565be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 566fa9e4066Sahrens 567745cd3c5Smaybee /* we may be looking for a snapshot */ 568745cd3c5Smaybee if (err == 0 && snapname != NULL) { 569a2cdcdd2SPaul Dagnelie dsl_dataset_t *snap_ds; 570fa9e4066Sahrens 571745cd3c5Smaybee if (*snapname++ != '@') { 572a2cdcdd2SPaul Dagnelie dsl_dataset_rele(ds, tag); 5733b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 574be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 575fa9e4066Sahrens } 576fa9e4066Sahrens 577745cd3c5Smaybee dprintf("looking for snapshot '%s'\n", snapname); 578a2cdcdd2SPaul Dagnelie err = dsl_dataset_snap_lookup(ds, snapname, &obj); 579745cd3c5Smaybee if (err == 0) 580a2cdcdd2SPaul Dagnelie err = dsl_dataset_hold_obj(dp, obj, tag, &snap_ds); 581a2cdcdd2SPaul Dagnelie dsl_dataset_rele(ds, tag); 582745cd3c5Smaybee 5833b2aab18SMatthew Ahrens if (err == 0) { 584a2cdcdd2SPaul Dagnelie mutex_enter(&snap_ds->ds_lock); 585a2cdcdd2SPaul Dagnelie if (snap_ds->ds_snapname[0] == 0) 586a2cdcdd2SPaul Dagnelie (void) strlcpy(snap_ds->ds_snapname, snapname, 587a2cdcdd2SPaul Dagnelie sizeof (snap_ds->ds_snapname)); 588a2cdcdd2SPaul Dagnelie mutex_exit(&snap_ds->ds_lock); 589a2cdcdd2SPaul Dagnelie ds = snap_ds; 590fa9e4066Sahrens } 591fa9e4066Sahrens } 592a2cdcdd2SPaul Dagnelie if (err == 0) 593a2cdcdd2SPaul Dagnelie *dsp = ds; 5943b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 595fa9e4066Sahrens return (err); 596fa9e4066Sahrens } 597fa9e4066Sahrens 598fa9e4066Sahrens int 5993b2aab18SMatthew Ahrens dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, 6003b2aab18SMatthew Ahrens void *tag, dsl_dataset_t **dsp) 6013b2aab18SMatthew Ahrens { 6023b2aab18SMatthew Ahrens int err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp); 6033b2aab18SMatthew Ahrens if (err != 0) 6043b2aab18SMatthew Ahrens return (err); 6053b2aab18SMatthew Ahrens if (!dsl_dataset_tryown(*dsp, tag)) { 6063b2aab18SMatthew Ahrens dsl_dataset_rele(*dsp, tag); 6073b2aab18SMatthew Ahrens *dsp = NULL; 608be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 6093b2aab18SMatthew Ahrens } 6103b2aab18SMatthew Ahrens return (0); 6113b2aab18SMatthew Ahrens } 6123b2aab18SMatthew Ahrens 6133b2aab18SMatthew Ahrens int 6143b2aab18SMatthew Ahrens dsl_dataset_own(dsl_pool_t *dp, const char *name, 615503ad85cSMatthew Ahrens void *tag, dsl_dataset_t **dsp) 616fa9e4066Sahrens { 6173b2aab18SMatthew Ahrens int err = dsl_dataset_hold(dp, name, tag, dsp); 6183b2aab18SMatthew Ahrens if (err != 0) 619745cd3c5Smaybee return (err); 6203b2aab18SMatthew Ahrens if (!dsl_dataset_tryown(*dsp, tag)) { 621503ad85cSMatthew Ahrens dsl_dataset_rele(*dsp, tag); 622be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 623745cd3c5Smaybee } 624745cd3c5Smaybee return (0); 625fa9e4066Sahrens } 626fa9e4066Sahrens 6273b2aab18SMatthew Ahrens /* 6283b2aab18SMatthew Ahrens * See the comment above dsl_pool_hold() for details. In summary, a long 6293b2aab18SMatthew Ahrens * hold is used to prevent destruction of a dataset while the pool hold 6303b2aab18SMatthew Ahrens * is dropped, allowing other concurrent operations (e.g. spa_sync()). 6313b2aab18SMatthew Ahrens * 6323b2aab18SMatthew Ahrens * The dataset and pool must be held when this function is called. After it 6333b2aab18SMatthew Ahrens * is called, the pool hold may be released while the dataset is still held 6343b2aab18SMatthew Ahrens * and accessed. 6353b2aab18SMatthew Ahrens */ 6363b2aab18SMatthew Ahrens void 6373b2aab18SMatthew Ahrens dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) 6383b2aab18SMatthew Ahrens { 6393b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 6403b2aab18SMatthew Ahrens (void) refcount_add(&ds->ds_longholds, tag); 6413b2aab18SMatthew Ahrens } 6423b2aab18SMatthew Ahrens 6433b2aab18SMatthew Ahrens void 6443b2aab18SMatthew Ahrens dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) 6453b2aab18SMatthew Ahrens { 6463b2aab18SMatthew Ahrens (void) refcount_remove(&ds->ds_longholds, tag); 6473b2aab18SMatthew Ahrens } 6483b2aab18SMatthew Ahrens 6493b2aab18SMatthew Ahrens /* Return B_TRUE if there are any long holds on this dataset. */ 6503b2aab18SMatthew Ahrens boolean_t 6513b2aab18SMatthew Ahrens dsl_dataset_long_held(dsl_dataset_t *ds) 6523b2aab18SMatthew Ahrens { 6533b2aab18SMatthew Ahrens return (!refcount_is_zero(&ds->ds_longholds)); 6543b2aab18SMatthew Ahrens } 6553b2aab18SMatthew Ahrens 656fa9e4066Sahrens void 657fa9e4066Sahrens dsl_dataset_name(dsl_dataset_t *ds, char *name) 658fa9e4066Sahrens { 659fa9e4066Sahrens if (ds == NULL) { 660fa9e4066Sahrens (void) strcpy(name, "mos"); 661fa9e4066Sahrens } else { 662fa9e4066Sahrens dsl_dir_name(ds->ds_dir, name); 6633b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 664fa9e4066Sahrens if (ds->ds_snapname[0]) { 665fa9e4066Sahrens (void) strcat(name, "@"); 666745cd3c5Smaybee /* 667745cd3c5Smaybee * We use a "recursive" mutex so that we 668745cd3c5Smaybee * can call dprintf_ds() with ds_lock held. 669745cd3c5Smaybee */ 670fa9e4066Sahrens if (!MUTEX_HELD(&ds->ds_lock)) { 671fa9e4066Sahrens mutex_enter(&ds->ds_lock); 672fa9e4066Sahrens (void) strcat(name, ds->ds_snapname); 673fa9e4066Sahrens mutex_exit(&ds->ds_lock); 674fa9e4066Sahrens } else { 675fa9e4066Sahrens (void) strcat(name, ds->ds_snapname); 676fa9e4066Sahrens } 677fa9e4066Sahrens } 678fa9e4066Sahrens } 679fa9e4066Sahrens } 680fa9e4066Sahrens 6813cb34c60Sahrens void 682745cd3c5Smaybee dsl_dataset_rele(dsl_dataset_t *ds, void *tag) 6833cb34c60Sahrens { 6843b2aab18SMatthew Ahrens dmu_buf_rele(ds->ds_dbuf, tag); 685745cd3c5Smaybee } 686745cd3c5Smaybee 687745cd3c5Smaybee void 688503ad85cSMatthew Ahrens dsl_dataset_disown(dsl_dataset_t *ds, void *tag) 689745cd3c5Smaybee { 690d808a4fcSJustin T. Gibbs ASSERT3P(ds->ds_owner, ==, tag); 691d808a4fcSJustin T. Gibbs ASSERT(ds->ds_dbuf != NULL); 692745cd3c5Smaybee 6933cb34c60Sahrens mutex_enter(&ds->ds_lock); 694745cd3c5Smaybee ds->ds_owner = NULL; 6953cb34c60Sahrens mutex_exit(&ds->ds_lock); 6963b2aab18SMatthew Ahrens dsl_dataset_long_rele(ds, tag); 697d808a4fcSJustin T. Gibbs dsl_dataset_rele(ds, tag); 6983cb34c60Sahrens } 6993cb34c60Sahrens 7003cb34c60Sahrens boolean_t 7013b2aab18SMatthew Ahrens dsl_dataset_tryown(dsl_dataset_t *ds, void *tag) 7023cb34c60Sahrens { 703745cd3c5Smaybee boolean_t gotit = FALSE; 704745cd3c5Smaybee 7059c3fd121SMatthew Ahrens ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 7063cb34c60Sahrens mutex_enter(&ds->ds_lock); 7073b2aab18SMatthew Ahrens if (ds->ds_owner == NULL && !DS_IS_INCONSISTENT(ds)) { 708503ad85cSMatthew Ahrens ds->ds_owner = tag; 7093b2aab18SMatthew Ahrens dsl_dataset_long_hold(ds, tag); 710745cd3c5Smaybee gotit = TRUE; 7113cb34c60Sahrens } 7123cb34c60Sahrens mutex_exit(&ds->ds_lock); 713745cd3c5Smaybee return (gotit); 714745cd3c5Smaybee } 715745cd3c5Smaybee 7169c3fd121SMatthew Ahrens boolean_t 7179c3fd121SMatthew Ahrens dsl_dataset_has_owner(dsl_dataset_t *ds) 7189c3fd121SMatthew Ahrens { 7199c3fd121SMatthew Ahrens boolean_t rv; 7209c3fd121SMatthew Ahrens mutex_enter(&ds->ds_lock); 7219c3fd121SMatthew Ahrens rv = (ds->ds_owner != NULL); 7229c3fd121SMatthew Ahrens mutex_exit(&ds->ds_lock); 7239c3fd121SMatthew Ahrens return (rv); 7249c3fd121SMatthew Ahrens } 7259c3fd121SMatthew Ahrens 726ca0cc391SMatthew Ahrens static void 727ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) 728ca0cc391SMatthew Ahrens { 729ca0cc391SMatthew Ahrens spa_t *spa = dmu_tx_pool(tx)->dp_spa; 730ca0cc391SMatthew Ahrens objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; 731ca0cc391SMatthew Ahrens uint64_t zero = 0; 732ca0cc391SMatthew Ahrens 733ca0cc391SMatthew Ahrens VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); 734ca0cc391SMatthew Ahrens 735ca0cc391SMatthew Ahrens spa_feature_incr(spa, f, tx); 736ca0cc391SMatthew Ahrens dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); 737ca0cc391SMatthew Ahrens 738ca0cc391SMatthew Ahrens VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, 739ca0cc391SMatthew Ahrens sizeof (zero), 1, &zero, tx)); 740ca0cc391SMatthew Ahrens } 741ca0cc391SMatthew Ahrens 742ca0cc391SMatthew Ahrens void 743ca0cc391SMatthew Ahrens dsl_dataset_deactivate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) 744ca0cc391SMatthew Ahrens { 745ca0cc391SMatthew Ahrens spa_t *spa = dmu_tx_pool(tx)->dp_spa; 746ca0cc391SMatthew Ahrens objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; 747ca0cc391SMatthew Ahrens 748ca0cc391SMatthew Ahrens VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); 749ca0cc391SMatthew Ahrens 750ca0cc391SMatthew Ahrens VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx)); 751ca0cc391SMatthew Ahrens spa_feature_decr(spa, f, tx); 752ca0cc391SMatthew Ahrens } 753ca0cc391SMatthew Ahrens 7541d452cf5Sahrens uint64_t 755088f3894Sahrens dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, 756ab04eb8eStimh uint64_t flags, dmu_tx_t *tx) 757fa9e4066Sahrens { 7583cb34c60Sahrens dsl_pool_t *dp = dd->dd_pool; 759fa9e4066Sahrens dmu_buf_t *dbuf; 760fa9e4066Sahrens dsl_dataset_phys_t *dsphys; 7613cb34c60Sahrens uint64_t dsobj; 762fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 763fa9e4066Sahrens 764088f3894Sahrens if (origin == NULL) 765088f3894Sahrens origin = dp->dp_origin_snap; 766088f3894Sahrens 7673cb34c60Sahrens ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); 768c1379625SJustin T. Gibbs ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); 769fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 770c1379625SJustin T. Gibbs ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); 771fa9e4066Sahrens 7721649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 7731649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 7743b2aab18SMatthew Ahrens VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 775fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 776fa9e4066Sahrens dsphys = dbuf->db_data; 777745cd3c5Smaybee bzero(dsphys, sizeof (dsl_dataset_phys_t)); 778fa9e4066Sahrens dsphys->ds_dir_obj = dd->dd_object; 779ab04eb8eStimh dsphys->ds_flags = flags; 780fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 781fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 782fa9e4066Sahrens sizeof (dsphys->ds_guid)); 783fa9e4066Sahrens dsphys->ds_snapnames_zapobj = 784ab04eb8eStimh zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, 785ab04eb8eStimh DMU_OT_NONE, 0, tx); 786fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 787088f3894Sahrens dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; 788a9799022Sck 789cde58dbcSMatthew Ahrens if (origin == NULL) { 790cde58dbcSMatthew Ahrens dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); 791cde58dbcSMatthew Ahrens } else { 7923b2aab18SMatthew Ahrens dsl_dataset_t *ohds; /* head of the origin snapshot */ 793cde58dbcSMatthew Ahrens 7943cb34c60Sahrens dsphys->ds_prev_snap_obj = origin->ds_object; 795fa9e4066Sahrens dsphys->ds_prev_snap_txg = 796c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_creation_txg; 797ad135b5dSChristopher Siden dsphys->ds_referenced_bytes = 798c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_referenced_bytes; 799fa9e4066Sahrens dsphys->ds_compressed_bytes = 800c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_compressed_bytes; 801fa9e4066Sahrens dsphys->ds_uncompressed_bytes = 802c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_uncompressed_bytes; 803c1379625SJustin T. Gibbs dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; 80442fcb65eSMatthew Ahrens 80542fcb65eSMatthew Ahrens /* 80642fcb65eSMatthew Ahrens * Inherit flags that describe the dataset's contents 80742fcb65eSMatthew Ahrens * (INCONSISTENT) or properties (Case Insensitive). 80842fcb65eSMatthew Ahrens */ 809c1379625SJustin T. Gibbs dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & 81042fcb65eSMatthew Ahrens (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); 811fa9e4066Sahrens 812ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 813ca0cc391SMatthew Ahrens if (origin->ds_feature_inuse[f]) 814ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(dsobj, f, tx); 815ca0cc391SMatthew Ahrens } 816b5152584SMatthew Ahrens 8173cb34c60Sahrens dmu_buf_will_dirty(origin->ds_dbuf, tx); 818c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_num_children++; 819fa9e4066Sahrens 8203b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 821c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, 822c1379625SJustin T. Gibbs FTAG, &ohds)); 823cde58dbcSMatthew Ahrens dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, 824cde58dbcSMatthew Ahrens dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); 825cde58dbcSMatthew Ahrens dsl_dataset_rele(ohds, FTAG); 826cde58dbcSMatthew Ahrens 827088f3894Sahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { 828c1379625SJustin T. Gibbs if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { 829c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_next_clones_obj = 830088f3894Sahrens zap_create(mos, 831088f3894Sahrens DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); 832088f3894Sahrens } 8333b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 834c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_next_clones_obj, 835c1379625SJustin T. Gibbs dsobj, tx)); 836088f3894Sahrens } 837088f3894Sahrens 838fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 839c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; 840cde58dbcSMatthew Ahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 841c1379625SJustin T. Gibbs if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { 842cde58dbcSMatthew Ahrens dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); 843c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_clones = 844cde58dbcSMatthew Ahrens zap_create(mos, 845cde58dbcSMatthew Ahrens DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); 846cde58dbcSMatthew Ahrens } 8473b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 848c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_clones, 849c1379625SJustin T. Gibbs dsobj, tx)); 850cde58dbcSMatthew Ahrens } 851fa9e4066Sahrens } 852ab04eb8eStimh 853ab04eb8eStimh if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) 854ab04eb8eStimh dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 855ab04eb8eStimh 856ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 857fa9e4066Sahrens 858fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 859c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; 8603cb34c60Sahrens 8613cb34c60Sahrens return (dsobj); 8623cb34c60Sahrens } 8633cb34c60Sahrens 8643b2aab18SMatthew Ahrens static void 8653b2aab18SMatthew Ahrens dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) 8663b2aab18SMatthew Ahrens { 8673b2aab18SMatthew Ahrens objset_t *os; 8683b2aab18SMatthew Ahrens 8693b2aab18SMatthew Ahrens VERIFY0(dmu_objset_from_ds(ds, &os)); 8703b2aab18SMatthew Ahrens bzero(&os->os_zil_header, sizeof (os->os_zil_header)); 8713b2aab18SMatthew Ahrens dsl_dataset_dirty(ds, tx); 8723b2aab18SMatthew Ahrens } 8733b2aab18SMatthew Ahrens 8743cb34c60Sahrens uint64_t 875ab04eb8eStimh dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, 876ab04eb8eStimh dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) 8773cb34c60Sahrens { 8783cb34c60Sahrens dsl_pool_t *dp = pdd->dd_pool; 8793cb34c60Sahrens uint64_t dsobj, ddobj; 8803cb34c60Sahrens dsl_dir_t *dd; 8813cb34c60Sahrens 8823b2aab18SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 8833cb34c60Sahrens ASSERT(lastname[0] != '@'); 8843cb34c60Sahrens 885088f3894Sahrens ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); 8863b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); 8873cb34c60Sahrens 8883b2aab18SMatthew Ahrens dsobj = dsl_dataset_create_sync_dd(dd, origin, 8893b2aab18SMatthew Ahrens flags & ~DS_CREATE_FLAG_NODIRTY, tx); 8903cb34c60Sahrens 8913cb34c60Sahrens dsl_deleg_set_create_perms(dd, tx, cr); 8923cb34c60Sahrens 893a2afb611SJerry Jelinek /* 894a2afb611SJerry Jelinek * Since we're creating a new node we know it's a leaf, so we can 895a2afb611SJerry Jelinek * initialize the counts if the limit feature is active. 896a2afb611SJerry Jelinek */ 897a2afb611SJerry Jelinek if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { 898a2afb611SJerry Jelinek uint64_t cnt = 0; 899a2afb611SJerry Jelinek objset_t *os = dd->dd_pool->dp_meta_objset; 900a2afb611SJerry Jelinek 901a2afb611SJerry Jelinek dsl_dir_zapify(dd, tx); 902a2afb611SJerry Jelinek VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, 903a2afb611SJerry Jelinek sizeof (cnt), 1, &cnt, tx)); 904a2afb611SJerry Jelinek VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, 905a2afb611SJerry Jelinek sizeof (cnt), 1, &cnt, tx)); 906a2afb611SJerry Jelinek } 907a2afb611SJerry Jelinek 9083b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 909fa9e4066Sahrens 910feaa74e4SMark Maybee /* 911feaa74e4SMark Maybee * If we are creating a clone, make sure we zero out any stale 912feaa74e4SMark Maybee * data from the origin snapshots zil header. 913feaa74e4SMark Maybee */ 9143b2aab18SMatthew Ahrens if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { 915feaa74e4SMark Maybee dsl_dataset_t *ds; 916feaa74e4SMark Maybee 9173b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); 9183b2aab18SMatthew Ahrens dsl_dataset_zero_zil(ds, tx); 919feaa74e4SMark Maybee dsl_dataset_rele(ds, FTAG); 920feaa74e4SMark Maybee } 921feaa74e4SMark Maybee 9221d452cf5Sahrens return (dsobj); 923fa9e4066Sahrens } 924fa9e4066Sahrens 9251d452cf5Sahrens /* 9263b2aab18SMatthew Ahrens * The unique space in the head dataset can be calculated by subtracting 9273b2aab18SMatthew Ahrens * the space used in the most recent snapshot, that is still being used 9283b2aab18SMatthew Ahrens * in this file system, from the space currently in use. To figure out 9293b2aab18SMatthew Ahrens * the space in the most recent snapshot still in use, we need to take 9303b2aab18SMatthew Ahrens * the total space used in the snapshot and subtract out the space that 9313b2aab18SMatthew Ahrens * has been freed up since the snapshot was taken. 9321d452cf5Sahrens */ 9333b2aab18SMatthew Ahrens void 9343b2aab18SMatthew Ahrens dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) 9351d452cf5Sahrens { 9363b2aab18SMatthew Ahrens uint64_t mrs_used; 9373b2aab18SMatthew Ahrens uint64_t dlused, dlcomp, dluncomp; 9381d452cf5Sahrens 939bc9014e6SJustin Gibbs ASSERT(!ds->ds_is_snapshot); 9401d452cf5Sahrens 941c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) 942c1379625SJustin T. Gibbs mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; 9433b2aab18SMatthew Ahrens else 9443b2aab18SMatthew Ahrens mrs_used = 0; 945842727c2SChris Kirby 9463b2aab18SMatthew Ahrens dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); 947fa9e4066Sahrens 9483b2aab18SMatthew Ahrens ASSERT3U(dlused, <=, mrs_used); 949c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes = 950c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); 95119b94df9SMatthew Ahrens 9523b2aab18SMatthew Ahrens if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= 9533b2aab18SMatthew Ahrens SPA_VERSION_UNIQUE_ACCURATE) 954c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 955fa9e4066Sahrens } 956fa9e4066Sahrens 9573b2aab18SMatthew Ahrens void 9583b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, 9593b2aab18SMatthew Ahrens dmu_tx_t *tx) 960842727c2SChris Kirby { 9613b2aab18SMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 9623b2aab18SMatthew Ahrens uint64_t count; 9633b2aab18SMatthew Ahrens int err; 9643b2aab18SMatthew Ahrens 965c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); 966c1379625SJustin T. Gibbs err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 967c1379625SJustin T. Gibbs obj, tx); 9683b2aab18SMatthew Ahrens /* 9693b2aab18SMatthew Ahrens * The err should not be ENOENT, but a bug in a previous version 9703b2aab18SMatthew Ahrens * of the code could cause upgrade_clones_cb() to not set 9713b2aab18SMatthew Ahrens * ds_next_snap_obj when it should, leading to a missing entry. 9723b2aab18SMatthew Ahrens * If we knew that the pool was created after 9733b2aab18SMatthew Ahrens * SPA_VERSION_NEXT_CLONES, we could assert that it isn't 9743b2aab18SMatthew Ahrens * ENOENT. However, at least we can check that we don't have 9753b2aab18SMatthew Ahrens * too many entries in the next_clones_obj even after failing to 9763b2aab18SMatthew Ahrens * remove this one. 9773b2aab18SMatthew Ahrens */ 9783b2aab18SMatthew Ahrens if (err != ENOENT) 9793b2aab18SMatthew Ahrens VERIFY0(err); 980c1379625SJustin T. Gibbs ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 9813b2aab18SMatthew Ahrens &count)); 982c1379625SJustin T. Gibbs ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); 9833b2aab18SMatthew Ahrens } 984842727c2SChris Kirby 985842727c2SChris Kirby 9863b2aab18SMatthew Ahrens blkptr_t * 9873b2aab18SMatthew Ahrens dsl_dataset_get_blkptr(dsl_dataset_t *ds) 9883b2aab18SMatthew Ahrens { 989c1379625SJustin T. Gibbs return (&dsl_dataset_phys(ds)->ds_bp); 990842727c2SChris Kirby } 991842727c2SChris Kirby 9923b2aab18SMatthew Ahrens void 9933b2aab18SMatthew Ahrens dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) 994842727c2SChris Kirby { 9953b2aab18SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 9963b2aab18SMatthew Ahrens /* If it's the meta-objset, set dp_meta_rootbp */ 9973b2aab18SMatthew Ahrens if (ds == NULL) { 9983b2aab18SMatthew Ahrens tx->tx_pool->dp_meta_rootbp = *bp; 9993b2aab18SMatthew Ahrens } else { 10003b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1001c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_bp = *bp; 1002842727c2SChris Kirby } 10033b2aab18SMatthew Ahrens } 1004842727c2SChris Kirby 10053b2aab18SMatthew Ahrens spa_t * 10063b2aab18SMatthew Ahrens dsl_dataset_get_spa(dsl_dataset_t *ds) 10073b2aab18SMatthew Ahrens { 10083b2aab18SMatthew Ahrens return (ds->ds_dir->dd_pool->dp_spa); 1009842727c2SChris Kirby } 1010842727c2SChris Kirby 10113b2aab18SMatthew Ahrens void 10123b2aab18SMatthew Ahrens dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) 1013fa9e4066Sahrens { 10143b2aab18SMatthew Ahrens dsl_pool_t *dp; 1015842727c2SChris Kirby 10163b2aab18SMatthew Ahrens if (ds == NULL) /* this is the meta-objset */ 10173b2aab18SMatthew Ahrens return; 10181d452cf5Sahrens 10193b2aab18SMatthew Ahrens ASSERT(ds->ds_objset != NULL); 1020fa9e4066Sahrens 1021c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) 10223b2aab18SMatthew Ahrens panic("dirtying snapshot!"); 1023fa9e4066Sahrens 10243b2aab18SMatthew Ahrens dp = ds->ds_dir->dd_pool; 1025ce636f8bSMatthew Ahrens 10263b2aab18SMatthew Ahrens if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 10273b2aab18SMatthew Ahrens /* up the hold count until we can be written out */ 10283b2aab18SMatthew Ahrens dmu_buf_add_ref(ds->ds_dbuf, ds); 10293b2aab18SMatthew Ahrens } 10303b2aab18SMatthew Ahrens } 1031fa9e4066Sahrens 10322e2c1355SMatthew Ahrens boolean_t 10332e2c1355SMatthew Ahrens dsl_dataset_is_dirty(dsl_dataset_t *ds) 10342e2c1355SMatthew Ahrens { 10352e2c1355SMatthew Ahrens for (int t = 0; t < TXG_SIZE; t++) { 10362e2c1355SMatthew Ahrens if (txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, 10372e2c1355SMatthew Ahrens ds, t)) 10382e2c1355SMatthew Ahrens return (B_TRUE); 10392e2c1355SMatthew Ahrens } 10402e2c1355SMatthew Ahrens return (B_FALSE); 10412e2c1355SMatthew Ahrens } 10422e2c1355SMatthew Ahrens 1043fa9e4066Sahrens static int 10443b2aab18SMatthew Ahrens dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) 1045fa9e4066Sahrens { 10463b2aab18SMatthew Ahrens uint64_t asize; 1047fa9e4066Sahrens 10483b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) 104988b7b0f2SMatthew Ahrens return (0); 1050fa9e4066Sahrens 1051e1930233Sbonwick /* 10523b2aab18SMatthew Ahrens * If there's an fs-only reservation, any blocks that might become 10533b2aab18SMatthew Ahrens * owned by the snapshot dataset must be accommodated by space 10543b2aab18SMatthew Ahrens * outside of the reservation. 1055e1930233Sbonwick */ 10563b2aab18SMatthew Ahrens ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); 1057c1379625SJustin T. Gibbs asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); 10583b2aab18SMatthew Ahrens if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) 1059be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 1060e1930233Sbonwick 10613cb34c60Sahrens /* 10623b2aab18SMatthew Ahrens * Propagate any reserved space for this snapshot to other 10633b2aab18SMatthew Ahrens * snapshot checks in this sync group. 10643cb34c60Sahrens */ 10653b2aab18SMatthew Ahrens if (asize > 0) 10663b2aab18SMatthew Ahrens dsl_dir_willuse_space(ds->ds_dir, asize, tx); 10673cb34c60Sahrens 1068e1930233Sbonwick return (0); 1069e1930233Sbonwick } 1070e1930233Sbonwick 10713b2aab18SMatthew Ahrens typedef struct dsl_dataset_snapshot_arg { 10723b2aab18SMatthew Ahrens nvlist_t *ddsa_snaps; 10733b2aab18SMatthew Ahrens nvlist_t *ddsa_props; 10743b2aab18SMatthew Ahrens nvlist_t *ddsa_errors; 1075a2afb611SJerry Jelinek cred_t *ddsa_cr; 10763b2aab18SMatthew Ahrens } dsl_dataset_snapshot_arg_t; 1077842727c2SChris Kirby 10783cb34c60Sahrens int 10793b2aab18SMatthew Ahrens dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, 1080a2afb611SJerry Jelinek dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) 10811d452cf5Sahrens { 10823b2aab18SMatthew Ahrens int error; 10833b2aab18SMatthew Ahrens uint64_t value; 1084fa9e4066Sahrens 10853b2aab18SMatthew Ahrens ds->ds_trysnap_txg = tx->tx_txg; 1086745cd3c5Smaybee 10873b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) 1088842727c2SChris Kirby return (0); 1089fa9e4066Sahrens 1090fa9e4066Sahrens /* 10913b2aab18SMatthew Ahrens * We don't allow multiple snapshots of the same txg. If there 10923b2aab18SMatthew Ahrens * is already one, try again. 1093fa9e4066Sahrens */ 1094c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) 1095be6fd75aSMatthew Ahrens return (SET_ERROR(EAGAIN)); 1096fa9e4066Sahrens 1097fa9e4066Sahrens /* 10983b2aab18SMatthew Ahrens * Check for conflicting snapshot name. 1099fa9e4066Sahrens */ 11003b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(ds, snapname, &value); 11013b2aab18SMatthew Ahrens if (error == 0) 1102be6fd75aSMatthew Ahrens return (SET_ERROR(EEXIST)); 11033b2aab18SMatthew Ahrens if (error != ENOENT) 11043b2aab18SMatthew Ahrens return (error); 1105842727c2SChris Kirby 1106ca48f36fSKeith M Wesolowski /* 1107ca48f36fSKeith M Wesolowski * We don't allow taking snapshots of inconsistent datasets, such as 1108ca48f36fSKeith M Wesolowski * those into which we are currently receiving. However, if we are 1109ca48f36fSKeith M Wesolowski * creating this snapshot as part of a receive, this check will be 1110ca48f36fSKeith M Wesolowski * executed atomically with respect to the completion of the receive 1111ca48f36fSKeith M Wesolowski * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this 1112ca48f36fSKeith M Wesolowski * case we ignore this, knowing it will be fixed up for us shortly in 1113ca48f36fSKeith M Wesolowski * dmu_recv_end_sync(). 1114ca48f36fSKeith M Wesolowski */ 1115ca48f36fSKeith M Wesolowski if (!recv && DS_IS_INCONSISTENT(ds)) 1116ca48f36fSKeith M Wesolowski return (SET_ERROR(EBUSY)); 1117ca48f36fSKeith M Wesolowski 1118a2afb611SJerry Jelinek /* 1119a2afb611SJerry Jelinek * Skip the check for temporary snapshots or if we have already checked 1120a2afb611SJerry Jelinek * the counts in dsl_dataset_snapshot_check. This means we really only 1121a2afb611SJerry Jelinek * check the count here when we're receiving a stream. 1122a2afb611SJerry Jelinek */ 1123a2afb611SJerry Jelinek if (cnt != 0 && cr != NULL) { 1124a2afb611SJerry Jelinek error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, 1125a2afb611SJerry Jelinek ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); 1126a2afb611SJerry Jelinek if (error != 0) 1127a2afb611SJerry Jelinek return (error); 1128a2afb611SJerry Jelinek } 1129a2afb611SJerry Jelinek 11303b2aab18SMatthew Ahrens error = dsl_dataset_snapshot_reserve_space(ds, tx); 11313b2aab18SMatthew Ahrens if (error != 0) 11323b2aab18SMatthew Ahrens return (error); 1133842727c2SChris Kirby 11341d452cf5Sahrens return (0); 11351d452cf5Sahrens } 11361d452cf5Sahrens 11373b2aab18SMatthew Ahrens static int 11383b2aab18SMatthew Ahrens dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) 1139745cd3c5Smaybee { 11403b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t *ddsa = arg; 11413b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 11423b2aab18SMatthew Ahrens nvpair_t *pair; 11433b2aab18SMatthew Ahrens int rv = 0; 11443b2aab18SMatthew Ahrens 1145a2afb611SJerry Jelinek /* 1146a2afb611SJerry Jelinek * Pre-compute how many total new snapshots will be created for each 1147a2afb611SJerry Jelinek * level in the tree and below. This is needed for validating the 1148a2afb611SJerry Jelinek * snapshot limit when either taking a recursive snapshot or when 1149a2afb611SJerry Jelinek * taking multiple snapshots. 1150a2afb611SJerry Jelinek * 1151a2afb611SJerry Jelinek * The problem is that the counts are not actually adjusted when 1152a2afb611SJerry Jelinek * we are checking, only when we finally sync. For a single snapshot, 1153a2afb611SJerry Jelinek * this is easy, the count will increase by 1 at each node up the tree, 1154a2afb611SJerry Jelinek * but its more complicated for the recursive/multiple snapshot case. 1155a2afb611SJerry Jelinek * 1156a2afb611SJerry Jelinek * The dsl_fs_ss_limit_check function does recursively check the count 1157a2afb611SJerry Jelinek * at each level up the tree but since it is validating each snapshot 1158a2afb611SJerry Jelinek * independently we need to be sure that we are validating the complete 1159a2afb611SJerry Jelinek * count for the entire set of snapshots. We do this by rolling up the 1160a2afb611SJerry Jelinek * counts for each component of the name into an nvlist and then 1161a2afb611SJerry Jelinek * checking each of those cases with the aggregated count. 1162a2afb611SJerry Jelinek * 1163a2afb611SJerry Jelinek * This approach properly handles not only the recursive snapshot 1164a2afb611SJerry Jelinek * case (where we get all of those on the ddsa_snaps list) but also 1165a2afb611SJerry Jelinek * the sibling case (e.g. snapshot a/b and a/c so that we will also 1166a2afb611SJerry Jelinek * validate the limit on 'a' using a count of 2). 1167a2afb611SJerry Jelinek * 1168a2afb611SJerry Jelinek * We validate the snapshot names in the third loop and only report 1169a2afb611SJerry Jelinek * name errors once. 1170a2afb611SJerry Jelinek */ 1171a2afb611SJerry Jelinek if (dmu_tx_is_syncing(tx)) { 1172a2afb611SJerry Jelinek nvlist_t *cnt_track = NULL; 1173a2afb611SJerry Jelinek cnt_track = fnvlist_alloc(); 1174a2afb611SJerry Jelinek 1175a2afb611SJerry Jelinek /* Rollup aggregated counts into the cnt_track list */ 1176a2afb611SJerry Jelinek for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 1177a2afb611SJerry Jelinek pair != NULL; 1178a2afb611SJerry Jelinek pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 1179a2afb611SJerry Jelinek char *pdelim; 1180a2afb611SJerry Jelinek uint64_t val; 1181a2afb611SJerry Jelinek char nm[MAXPATHLEN]; 1182a2afb611SJerry Jelinek 1183a2afb611SJerry Jelinek (void) strlcpy(nm, nvpair_name(pair), sizeof (nm)); 1184a2afb611SJerry Jelinek pdelim = strchr(nm, '@'); 1185a2afb611SJerry Jelinek if (pdelim == NULL) 1186a2afb611SJerry Jelinek continue; 1187a2afb611SJerry Jelinek *pdelim = '\0'; 1188a2afb611SJerry Jelinek 1189a2afb611SJerry Jelinek do { 1190a2afb611SJerry Jelinek if (nvlist_lookup_uint64(cnt_track, nm, 1191a2afb611SJerry Jelinek &val) == 0) { 1192a2afb611SJerry Jelinek /* update existing entry */ 1193a2afb611SJerry Jelinek fnvlist_add_uint64(cnt_track, nm, 1194a2afb611SJerry Jelinek val + 1); 1195a2afb611SJerry Jelinek } else { 1196a2afb611SJerry Jelinek /* add to list */ 1197a2afb611SJerry Jelinek fnvlist_add_uint64(cnt_track, nm, 1); 1198a2afb611SJerry Jelinek } 1199a2afb611SJerry Jelinek 1200a2afb611SJerry Jelinek pdelim = strrchr(nm, '/'); 1201a2afb611SJerry Jelinek if (pdelim != NULL) 1202a2afb611SJerry Jelinek *pdelim = '\0'; 1203a2afb611SJerry Jelinek } while (pdelim != NULL); 1204a2afb611SJerry Jelinek } 1205a2afb611SJerry Jelinek 1206a2afb611SJerry Jelinek /* Check aggregated counts at each level */ 1207a2afb611SJerry Jelinek for (pair = nvlist_next_nvpair(cnt_track, NULL); 1208a2afb611SJerry Jelinek pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { 1209a2afb611SJerry Jelinek int error = 0; 1210a2afb611SJerry Jelinek char *name; 1211a2afb611SJerry Jelinek uint64_t cnt = 0; 1212a2afb611SJerry Jelinek dsl_dataset_t *ds; 1213a2afb611SJerry Jelinek 1214a2afb611SJerry Jelinek name = nvpair_name(pair); 1215a2afb611SJerry Jelinek cnt = fnvpair_value_uint64(pair); 1216a2afb611SJerry Jelinek ASSERT(cnt > 0); 1217a2afb611SJerry Jelinek 1218a2afb611SJerry Jelinek error = dsl_dataset_hold(dp, name, FTAG, &ds); 1219a2afb611SJerry Jelinek if (error == 0) { 1220a2afb611SJerry Jelinek error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, 1221a2afb611SJerry Jelinek ZFS_PROP_SNAPSHOT_LIMIT, NULL, 1222a2afb611SJerry Jelinek ddsa->ddsa_cr); 1223a2afb611SJerry Jelinek dsl_dataset_rele(ds, FTAG); 1224a2afb611SJerry Jelinek } 1225a2afb611SJerry Jelinek 1226a2afb611SJerry Jelinek if (error != 0) { 1227a2afb611SJerry Jelinek if (ddsa->ddsa_errors != NULL) 1228a2afb611SJerry Jelinek fnvlist_add_int32(ddsa->ddsa_errors, 1229a2afb611SJerry Jelinek name, error); 1230a2afb611SJerry Jelinek rv = error; 1231a2afb611SJerry Jelinek /* only report one error for this check */ 1232a2afb611SJerry Jelinek break; 1233a2afb611SJerry Jelinek } 1234a2afb611SJerry Jelinek } 1235a2afb611SJerry Jelinek nvlist_free(cnt_track); 1236a2afb611SJerry Jelinek } 1237a2afb611SJerry Jelinek 12383b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 12393b2aab18SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 12403b2aab18SMatthew Ahrens int error = 0; 12413b2aab18SMatthew Ahrens dsl_dataset_t *ds; 12423b2aab18SMatthew Ahrens char *name, *atp; 12433b2aab18SMatthew Ahrens char dsname[MAXNAMELEN]; 12443b2aab18SMatthew Ahrens 12453b2aab18SMatthew Ahrens name = nvpair_name(pair); 12463b2aab18SMatthew Ahrens if (strlen(name) >= MAXNAMELEN) 1247be6fd75aSMatthew Ahrens error = SET_ERROR(ENAMETOOLONG); 12483b2aab18SMatthew Ahrens if (error == 0) { 12493b2aab18SMatthew Ahrens atp = strchr(name, '@'); 12503b2aab18SMatthew Ahrens if (atp == NULL) 1251be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 12523b2aab18SMatthew Ahrens if (error == 0) 12533b2aab18SMatthew Ahrens (void) strlcpy(dsname, name, atp - name + 1); 12543b2aab18SMatthew Ahrens } 12553b2aab18SMatthew Ahrens if (error == 0) 12563b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, dsname, FTAG, &ds); 12573b2aab18SMatthew Ahrens if (error == 0) { 1258a2afb611SJerry Jelinek /* passing 0/NULL skips dsl_fs_ss_limit_check */ 12593b2aab18SMatthew Ahrens error = dsl_dataset_snapshot_check_impl(ds, 1260a2afb611SJerry Jelinek atp + 1, tx, B_FALSE, 0, NULL); 12613b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 12623b2aab18SMatthew Ahrens } 1263745cd3c5Smaybee 12643b2aab18SMatthew Ahrens if (error != 0) { 12653b2aab18SMatthew Ahrens if (ddsa->ddsa_errors != NULL) { 12663b2aab18SMatthew Ahrens fnvlist_add_int32(ddsa->ddsa_errors, 12673b2aab18SMatthew Ahrens name, error); 12683b2aab18SMatthew Ahrens } 12693b2aab18SMatthew Ahrens rv = error; 12703b2aab18SMatthew Ahrens } 12713b2aab18SMatthew Ahrens } 1272a2afb611SJerry Jelinek 12733b2aab18SMatthew Ahrens return (rv); 1274745cd3c5Smaybee } 1275745cd3c5Smaybee 12763b2aab18SMatthew Ahrens void 12773b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, 12783b2aab18SMatthew Ahrens dmu_tx_t *tx) 1279745cd3c5Smaybee { 12803b2aab18SMatthew Ahrens static zil_header_t zero_zil; 1281745cd3c5Smaybee 12823b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 12833b2aab18SMatthew Ahrens dmu_buf_t *dbuf; 12843b2aab18SMatthew Ahrens dsl_dataset_phys_t *dsphys; 12853b2aab18SMatthew Ahrens uint64_t dsobj, crtxg; 12863b2aab18SMatthew Ahrens objset_t *mos = dp->dp_meta_objset; 12873b2aab18SMatthew Ahrens objset_t *os; 1288745cd3c5Smaybee 12893b2aab18SMatthew Ahrens ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); 1290c33e334fSMatthew Ahrens 1291c33e334fSMatthew Ahrens /* 12923b2aab18SMatthew Ahrens * If we are on an old pool, the zil must not be active, in which 12933b2aab18SMatthew Ahrens * case it will be zeroed. Usually zil_suspend() accomplishes this. 1294c33e334fSMatthew Ahrens */ 12953b2aab18SMatthew Ahrens ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || 12963b2aab18SMatthew Ahrens dmu_objset_from_ds(ds, &os) != 0 || 12973b2aab18SMatthew Ahrens bcmp(&os->os_phys->os_zil_header, &zero_zil, 12983b2aab18SMatthew Ahrens sizeof (zero_zil)) == 0); 1299c33e334fSMatthew Ahrens 1300a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); 1301cde58dbcSMatthew Ahrens 1302cde58dbcSMatthew Ahrens /* 13033b2aab18SMatthew Ahrens * The origin's ds_creation_txg has to be < TXG_INITIAL 1304088f3894Sahrens */ 1305088f3894Sahrens if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) 1306088f3894Sahrens crtxg = 1; 1307088f3894Sahrens else 1308088f3894Sahrens crtxg = tx->tx_txg; 1309088f3894Sahrens 13101649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 13111649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 13123b2aab18SMatthew Ahrens VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 1313fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 1314fa9e4066Sahrens dsphys = dbuf->db_data; 1315745cd3c5Smaybee bzero(dsphys, sizeof (dsl_dataset_phys_t)); 13161d452cf5Sahrens dsphys->ds_dir_obj = ds->ds_dir->dd_object; 1317fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 1318fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 1319fa9e4066Sahrens sizeof (dsphys->ds_guid)); 1320c1379625SJustin T. Gibbs dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 1321c1379625SJustin T. Gibbs dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; 1322fa9e4066Sahrens dsphys->ds_next_snap_obj = ds->ds_object; 1323fa9e4066Sahrens dsphys->ds_num_children = 1; 1324fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 1325088f3894Sahrens dsphys->ds_creation_txg = crtxg; 1326c1379625SJustin T. Gibbs dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; 1327c1379625SJustin T. Gibbs dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; 1328c1379625SJustin T. Gibbs dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; 1329c1379625SJustin T. Gibbs dsphys->ds_uncompressed_bytes = 1330c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes; 1331c1379625SJustin T. Gibbs dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; 1332c1379625SJustin T. Gibbs dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; 1333ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 1334fa9e4066Sahrens 1335ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 1336ca0cc391SMatthew Ahrens if (ds->ds_feature_inuse[f]) 1337ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(dsobj, f, tx); 1338ca0cc391SMatthew Ahrens } 1339b5152584SMatthew Ahrens 1340c1379625SJustin T. Gibbs ASSERT3U(ds->ds_prev != 0, ==, 1341c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); 13421d452cf5Sahrens if (ds->ds_prev) { 1343088f3894Sahrens uint64_t next_clones_obj = 1344c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; 1345c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 1346fa9e4066Sahrens ds->ds_object || 1347c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); 1348c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 1349c1379625SJustin T. Gibbs ds->ds_object) { 13501d452cf5Sahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 1351c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, 1352c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); 1353c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; 1354088f3894Sahrens } else if (next_clones_obj != 0) { 13553b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(ds->ds_prev, 1356c33e334fSMatthew Ahrens dsphys->ds_next_snap_obj, tx); 13573b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 1358088f3894Sahrens next_clones_obj, dsobj, tx)); 1359fa9e4066Sahrens } 1360fa9e4066Sahrens } 1361fa9e4066Sahrens 1362a9799022Sck /* 1363a9799022Sck * If we have a reference-reservation on this dataset, we will 1364a9799022Sck * need to increase the amount of refreservation being charged 1365a9799022Sck * since our unique space is going to zero. 1366a9799022Sck */ 1367a9799022Sck if (ds->ds_reserved) { 13683f9d6ad7SLin Ling int64_t delta; 13693f9d6ad7SLin Ling ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); 1370c1379625SJustin T. Gibbs delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, 1371c1379625SJustin T. Gibbs ds->ds_reserved); 137274e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, 13733f9d6ad7SLin Ling delta, 0, 0, tx); 1374a9799022Sck } 1375a9799022Sck 1376fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1377c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_deadlist_obj = 1378c1379625SJustin T. Gibbs dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, 1379c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); 1380cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 1381c1379625SJustin T. Gibbs dsl_deadlist_open(&ds->ds_deadlist, mos, 1382c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_deadlist_obj); 1383cde58dbcSMatthew Ahrens dsl_deadlist_add_key(&ds->ds_deadlist, 1384c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); 1385cde58dbcSMatthew Ahrens 1386c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); 1387c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; 1388c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; 1389c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes = 0; 1390a9799022Sck if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) 1391c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 1392fa9e4066Sahrens 1393c1379625SJustin T. Gibbs VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, 13943b2aab18SMatthew Ahrens snapname, 8, 1, &dsobj, tx)); 1395fa9e4066Sahrens 1396fa9e4066Sahrens if (ds->ds_prev) 13973b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 13983b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 1399c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); 1400ecd6cf80Smarks 14013f9d6ad7SLin Ling dsl_scan_ds_snapshotted(ds, tx); 1402088f3894Sahrens 140371eb0538SChris Kirby dsl_dir_snap_cmtime_update(ds->ds_dir); 140471eb0538SChris Kirby 14054445fffbSMatthew Ahrens spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, ""); 1406fa9e4066Sahrens } 1407fa9e4066Sahrens 14083b2aab18SMatthew Ahrens static void 14093b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) 1410fa9e4066Sahrens { 14113b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t *ddsa = arg; 14123b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 14133b2aab18SMatthew Ahrens nvpair_t *pair; 141491ebeef5Sahrens 14153b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 14163b2aab18SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 14173b2aab18SMatthew Ahrens dsl_dataset_t *ds; 14183b2aab18SMatthew Ahrens char *name, *atp; 14193b2aab18SMatthew Ahrens char dsname[MAXNAMELEN]; 14203b2aab18SMatthew Ahrens 14213b2aab18SMatthew Ahrens name = nvpair_name(pair); 14223b2aab18SMatthew Ahrens atp = strchr(name, '@'); 14233b2aab18SMatthew Ahrens (void) strlcpy(dsname, name, atp - name + 1); 14243b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); 14253b2aab18SMatthew Ahrens 14263b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); 14273b2aab18SMatthew Ahrens if (ddsa->ddsa_props != NULL) { 14283b2aab18SMatthew Ahrens dsl_props_set_sync_impl(ds->ds_prev, 14293b2aab18SMatthew Ahrens ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); 14303b2aab18SMatthew Ahrens } 14313b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 14323b2aab18SMatthew Ahrens } 1433fa9e4066Sahrens } 1434fa9e4066Sahrens 14353b2aab18SMatthew Ahrens /* 14363b2aab18SMatthew Ahrens * The snapshots must all be in the same pool. 14373b2aab18SMatthew Ahrens * All-or-nothing: if there are any failures, nothing will be modified. 14383b2aab18SMatthew Ahrens */ 14393b2aab18SMatthew Ahrens int 14403b2aab18SMatthew Ahrens dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) 144119b94df9SMatthew Ahrens { 14423b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t ddsa; 14433b2aab18SMatthew Ahrens nvpair_t *pair; 14443b2aab18SMatthew Ahrens boolean_t needsuspend; 14453b2aab18SMatthew Ahrens int error; 14463b2aab18SMatthew Ahrens spa_t *spa; 14473b2aab18SMatthew Ahrens char *firstname; 14483b2aab18SMatthew Ahrens nvlist_t *suspended = NULL; 144919b94df9SMatthew Ahrens 14503b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(snaps, NULL); 14513b2aab18SMatthew Ahrens if (pair == NULL) 14523b2aab18SMatthew Ahrens return (0); 14533b2aab18SMatthew Ahrens firstname = nvpair_name(pair); 14543b2aab18SMatthew Ahrens 14553b2aab18SMatthew Ahrens error = spa_open(firstname, &spa, FTAG); 14563b2aab18SMatthew Ahrens if (error != 0) 14573b2aab18SMatthew Ahrens return (error); 14583b2aab18SMatthew Ahrens needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); 14593b2aab18SMatthew Ahrens spa_close(spa, FTAG); 14603b2aab18SMatthew Ahrens 14613b2aab18SMatthew Ahrens if (needsuspend) { 14623b2aab18SMatthew Ahrens suspended = fnvlist_alloc(); 14633b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 14643b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(snaps, pair)) { 14653b2aab18SMatthew Ahrens char fsname[MAXNAMELEN]; 14663b2aab18SMatthew Ahrens char *snapname = nvpair_name(pair); 14673b2aab18SMatthew Ahrens char *atp; 14683b2aab18SMatthew Ahrens void *cookie; 14693b2aab18SMatthew Ahrens 14703b2aab18SMatthew Ahrens atp = strchr(snapname, '@'); 14713b2aab18SMatthew Ahrens if (atp == NULL) { 1472be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 14733b2aab18SMatthew Ahrens break; 14743b2aab18SMatthew Ahrens } 14753b2aab18SMatthew Ahrens (void) strlcpy(fsname, snapname, atp - snapname + 1); 14763b2aab18SMatthew Ahrens 14773b2aab18SMatthew Ahrens error = zil_suspend(fsname, &cookie); 14783b2aab18SMatthew Ahrens if (error != 0) 14793b2aab18SMatthew Ahrens break; 14803b2aab18SMatthew Ahrens fnvlist_add_uint64(suspended, fsname, 14813b2aab18SMatthew Ahrens (uintptr_t)cookie); 14823b2aab18SMatthew Ahrens } 14833b2aab18SMatthew Ahrens } 14843b2aab18SMatthew Ahrens 14853b2aab18SMatthew Ahrens ddsa.ddsa_snaps = snaps; 14863b2aab18SMatthew Ahrens ddsa.ddsa_props = props; 14873b2aab18SMatthew Ahrens ddsa.ddsa_errors = errors; 1488a2afb611SJerry Jelinek ddsa.ddsa_cr = CRED(); 14893b2aab18SMatthew Ahrens 14903b2aab18SMatthew Ahrens if (error == 0) { 14913b2aab18SMatthew Ahrens error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, 14923b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync, &ddsa, 14937d46dc6cSMatthew Ahrens fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); 14943b2aab18SMatthew Ahrens } 14953b2aab18SMatthew Ahrens 14963b2aab18SMatthew Ahrens if (suspended != NULL) { 14973b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; 14983b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(suspended, pair)) { 14993b2aab18SMatthew Ahrens zil_resume((void *)(uintptr_t) 15003b2aab18SMatthew Ahrens fnvpair_value_uint64(pair)); 15013b2aab18SMatthew Ahrens } 15023b2aab18SMatthew Ahrens fnvlist_free(suspended); 15033b2aab18SMatthew Ahrens } 15043b2aab18SMatthew Ahrens 15053b2aab18SMatthew Ahrens return (error); 15063b2aab18SMatthew Ahrens } 15073b2aab18SMatthew Ahrens 15083b2aab18SMatthew Ahrens typedef struct dsl_dataset_snapshot_tmp_arg { 15093b2aab18SMatthew Ahrens const char *ddsta_fsname; 15103b2aab18SMatthew Ahrens const char *ddsta_snapname; 15113b2aab18SMatthew Ahrens minor_t ddsta_cleanup_minor; 15123b2aab18SMatthew Ahrens const char *ddsta_htag; 15133b2aab18SMatthew Ahrens } dsl_dataset_snapshot_tmp_arg_t; 15143b2aab18SMatthew Ahrens 15153b2aab18SMatthew Ahrens static int 15163b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) 15173b2aab18SMatthew Ahrens { 15183b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; 15193b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 15203b2aab18SMatthew Ahrens dsl_dataset_t *ds; 15213b2aab18SMatthew Ahrens int error; 15223b2aab18SMatthew Ahrens 15233b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); 15243b2aab18SMatthew Ahrens if (error != 0) 15253b2aab18SMatthew Ahrens return (error); 15263b2aab18SMatthew Ahrens 1527a2afb611SJerry Jelinek /* NULL cred means no limit check for tmp snapshot */ 1528ca48f36fSKeith M Wesolowski error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, 1529a2afb611SJerry Jelinek tx, B_FALSE, 0, NULL); 15303b2aab18SMatthew Ahrens if (error != 0) { 15313b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 15323b2aab18SMatthew Ahrens return (error); 15333b2aab18SMatthew Ahrens } 15343b2aab18SMatthew Ahrens 15353b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { 15363b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 1537be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 15383b2aab18SMatthew Ahrens } 15393b2aab18SMatthew Ahrens error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, 15403b2aab18SMatthew Ahrens B_TRUE, tx); 15413b2aab18SMatthew Ahrens if (error != 0) { 15423b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 15433b2aab18SMatthew Ahrens return (error); 15443b2aab18SMatthew Ahrens } 15453b2aab18SMatthew Ahrens 15463b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 15473b2aab18SMatthew Ahrens return (0); 15483b2aab18SMatthew Ahrens } 15493b2aab18SMatthew Ahrens 15503b2aab18SMatthew Ahrens static void 15513b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) 15523b2aab18SMatthew Ahrens { 15533b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; 15543b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 15553b2aab18SMatthew Ahrens dsl_dataset_t *ds; 15563b2aab18SMatthew Ahrens 15573b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); 15583b2aab18SMatthew Ahrens 15593b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); 15603b2aab18SMatthew Ahrens dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, 15613b2aab18SMatthew Ahrens ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); 15623b2aab18SMatthew Ahrens dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); 15633b2aab18SMatthew Ahrens 15643b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 15653b2aab18SMatthew Ahrens } 15663b2aab18SMatthew Ahrens 15673b2aab18SMatthew Ahrens int 15683b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, 15693b2aab18SMatthew Ahrens minor_t cleanup_minor, const char *htag) 15703b2aab18SMatthew Ahrens { 15713b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t ddsta; 15723b2aab18SMatthew Ahrens int error; 15733b2aab18SMatthew Ahrens spa_t *spa; 15743b2aab18SMatthew Ahrens boolean_t needsuspend; 15753b2aab18SMatthew Ahrens void *cookie; 15763b2aab18SMatthew Ahrens 15773b2aab18SMatthew Ahrens ddsta.ddsta_fsname = fsname; 15783b2aab18SMatthew Ahrens ddsta.ddsta_snapname = snapname; 15793b2aab18SMatthew Ahrens ddsta.ddsta_cleanup_minor = cleanup_minor; 15803b2aab18SMatthew Ahrens ddsta.ddsta_htag = htag; 15813b2aab18SMatthew Ahrens 15823b2aab18SMatthew Ahrens error = spa_open(fsname, &spa, FTAG); 15833b2aab18SMatthew Ahrens if (error != 0) 15843b2aab18SMatthew Ahrens return (error); 15853b2aab18SMatthew Ahrens needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); 15863b2aab18SMatthew Ahrens spa_close(spa, FTAG); 15873b2aab18SMatthew Ahrens 15883b2aab18SMatthew Ahrens if (needsuspend) { 15893b2aab18SMatthew Ahrens error = zil_suspend(fsname, &cookie); 15903b2aab18SMatthew Ahrens if (error != 0) 15913b2aab18SMatthew Ahrens return (error); 15923b2aab18SMatthew Ahrens } 15933b2aab18SMatthew Ahrens 15943b2aab18SMatthew Ahrens error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, 15957d46dc6cSMatthew Ahrens dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); 15963b2aab18SMatthew Ahrens 15973b2aab18SMatthew Ahrens if (needsuspend) 15983b2aab18SMatthew Ahrens zil_resume(cookie); 15993b2aab18SMatthew Ahrens return (error); 16003b2aab18SMatthew Ahrens } 16013b2aab18SMatthew Ahrens 16023b2aab18SMatthew Ahrens 16033b2aab18SMatthew Ahrens void 16043b2aab18SMatthew Ahrens dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) 16053b2aab18SMatthew Ahrens { 16063b2aab18SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 16073b2aab18SMatthew Ahrens ASSERT(ds->ds_objset != NULL); 1608c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); 16093b2aab18SMatthew Ahrens 16103b2aab18SMatthew Ahrens /* 16113b2aab18SMatthew Ahrens * in case we had to change ds_fsid_guid when we opened it, 16123b2aab18SMatthew Ahrens * sync it out now. 16133b2aab18SMatthew Ahrens */ 16143b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1615c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; 16163b2aab18SMatthew Ahrens 16179c3fd121SMatthew Ahrens if (ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] != 0) { 16189c3fd121SMatthew Ahrens VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, 16199c3fd121SMatthew Ahrens ds->ds_object, DS_FIELD_RESUME_OBJECT, 8, 1, 16209c3fd121SMatthew Ahrens &ds->ds_resume_object[tx->tx_txg & TXG_MASK], tx)); 16219c3fd121SMatthew Ahrens VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, 16229c3fd121SMatthew Ahrens ds->ds_object, DS_FIELD_RESUME_OFFSET, 8, 1, 16239c3fd121SMatthew Ahrens &ds->ds_resume_offset[tx->tx_txg & TXG_MASK], tx)); 16249c3fd121SMatthew Ahrens VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, 16259c3fd121SMatthew Ahrens ds->ds_object, DS_FIELD_RESUME_BYTES, 8, 1, 16269c3fd121SMatthew Ahrens &ds->ds_resume_bytes[tx->tx_txg & TXG_MASK], tx)); 16279c3fd121SMatthew Ahrens ds->ds_resume_object[tx->tx_txg & TXG_MASK] = 0; 16289c3fd121SMatthew Ahrens ds->ds_resume_offset[tx->tx_txg & TXG_MASK] = 0; 16299c3fd121SMatthew Ahrens ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] = 0; 16309c3fd121SMatthew Ahrens } 16319c3fd121SMatthew Ahrens 16323b2aab18SMatthew Ahrens dmu_objset_sync(ds->ds_objset, zio, tx); 1633b5152584SMatthew Ahrens 1634ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 1635ca0cc391SMatthew Ahrens if (ds->ds_feature_activation_needed[f]) { 1636ca0cc391SMatthew Ahrens if (ds->ds_feature_inuse[f]) 1637ca0cc391SMatthew Ahrens continue; 1638ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(ds->ds_object, f, tx); 1639ca0cc391SMatthew Ahrens ds->ds_feature_inuse[f] = B_TRUE; 1640ca0cc391SMatthew Ahrens } 1641b5152584SMatthew Ahrens } 16423b2aab18SMatthew Ahrens } 16433b2aab18SMatthew Ahrens 16443b2aab18SMatthew Ahrens static void 16453b2aab18SMatthew Ahrens get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) 16463b2aab18SMatthew Ahrens { 16473b2aab18SMatthew Ahrens uint64_t count = 0; 16483b2aab18SMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 16493b2aab18SMatthew Ahrens zap_cursor_t zc; 16503b2aab18SMatthew Ahrens zap_attribute_t za; 16513b2aab18SMatthew Ahrens nvlist_t *propval = fnvlist_alloc(); 16523b2aab18SMatthew Ahrens nvlist_t *val = fnvlist_alloc(); 16533b2aab18SMatthew Ahrens 16543b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 165519b94df9SMatthew Ahrens 165619b94df9SMatthew Ahrens /* 16573b2aab18SMatthew Ahrens * There may be missing entries in ds_next_clones_obj 165819b94df9SMatthew Ahrens * due to a bug in a previous version of the code. 165919b94df9SMatthew Ahrens * Only trust it if it has the right number of entries. 166019b94df9SMatthew Ahrens */ 1661c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { 1662c1379625SJustin T. Gibbs VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 166319b94df9SMatthew Ahrens &count)); 166419b94df9SMatthew Ahrens } 1665c1379625SJustin T. Gibbs if (count != dsl_dataset_phys(ds)->ds_num_children - 1) 166619b94df9SMatthew Ahrens goto fail; 1667c1379625SJustin T. Gibbs for (zap_cursor_init(&zc, mos, 1668c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_next_clones_obj); 166919b94df9SMatthew Ahrens zap_cursor_retrieve(&zc, &za) == 0; 167019b94df9SMatthew Ahrens zap_cursor_advance(&zc)) { 167119b94df9SMatthew Ahrens dsl_dataset_t *clone; 167219b94df9SMatthew Ahrens char buf[ZFS_MAXNAMELEN]; 16733b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, 16743b2aab18SMatthew Ahrens za.za_first_integer, FTAG, &clone)); 167519b94df9SMatthew Ahrens dsl_dir_name(clone->ds_dir, buf); 16763b2aab18SMatthew Ahrens fnvlist_add_boolean(val, buf); 167719b94df9SMatthew Ahrens dsl_dataset_rele(clone, FTAG); 167819b94df9SMatthew Ahrens } 167919b94df9SMatthew Ahrens zap_cursor_fini(&zc); 16803b2aab18SMatthew Ahrens fnvlist_add_nvlist(propval, ZPROP_VALUE, val); 16813b2aab18SMatthew Ahrens fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), propval); 168219b94df9SMatthew Ahrens fail: 168319b94df9SMatthew Ahrens nvlist_free(val); 168419b94df9SMatthew Ahrens nvlist_free(propval); 168519b94df9SMatthew Ahrens } 168619b94df9SMatthew Ahrens 16879c3fd121SMatthew Ahrens static void 16889c3fd121SMatthew Ahrens get_receive_resume_stats(dsl_dataset_t *ds, nvlist_t *nv) 16899c3fd121SMatthew Ahrens { 16909c3fd121SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 16919c3fd121SMatthew Ahrens 16929c3fd121SMatthew Ahrens if (dsl_dataset_has_resume_receive_state(ds)) { 16939c3fd121SMatthew Ahrens char *str; 16949c3fd121SMatthew Ahrens void *packed; 16959c3fd121SMatthew Ahrens uint8_t *compressed; 16969c3fd121SMatthew Ahrens uint64_t val; 16979c3fd121SMatthew Ahrens nvlist_t *token_nv = fnvlist_alloc(); 16989c3fd121SMatthew Ahrens size_t packed_size, compressed_size; 16999c3fd121SMatthew Ahrens 17009c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 17019c3fd121SMatthew Ahrens DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val) == 0) { 17029c3fd121SMatthew Ahrens fnvlist_add_uint64(token_nv, "fromguid", val); 17039c3fd121SMatthew Ahrens } 17049c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 17059c3fd121SMatthew Ahrens DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val) == 0) { 17069c3fd121SMatthew Ahrens fnvlist_add_uint64(token_nv, "object", val); 17079c3fd121SMatthew Ahrens } 17089c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 17099c3fd121SMatthew Ahrens DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val) == 0) { 17109c3fd121SMatthew Ahrens fnvlist_add_uint64(token_nv, "offset", val); 17119c3fd121SMatthew Ahrens } 17129c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 17139c3fd121SMatthew Ahrens DS_FIELD_RESUME_BYTES, sizeof (val), 1, &val) == 0) { 17149c3fd121SMatthew Ahrens fnvlist_add_uint64(token_nv, "bytes", val); 17159c3fd121SMatthew Ahrens } 17169c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 17179c3fd121SMatthew Ahrens DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val) == 0) { 17189c3fd121SMatthew Ahrens fnvlist_add_uint64(token_nv, "toguid", val); 17199c3fd121SMatthew Ahrens } 17209c3fd121SMatthew Ahrens char buf[256]; 17219c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 17229c3fd121SMatthew Ahrens DS_FIELD_RESUME_TONAME, 1, sizeof (buf), buf) == 0) { 17239c3fd121SMatthew Ahrens fnvlist_add_string(token_nv, "toname", buf); 17249c3fd121SMatthew Ahrens } 17259c3fd121SMatthew Ahrens if (zap_contains(dp->dp_meta_objset, ds->ds_object, 17269c3fd121SMatthew Ahrens DS_FIELD_RESUME_EMBEDOK) == 0) { 17279c3fd121SMatthew Ahrens fnvlist_add_boolean(token_nv, "embedok"); 17289c3fd121SMatthew Ahrens } 17299c3fd121SMatthew Ahrens packed = fnvlist_pack(token_nv, &packed_size); 17309c3fd121SMatthew Ahrens fnvlist_free(token_nv); 17319c3fd121SMatthew Ahrens compressed = kmem_alloc(packed_size, KM_SLEEP); 17329c3fd121SMatthew Ahrens 17339c3fd121SMatthew Ahrens compressed_size = gzip_compress(packed, compressed, 17349c3fd121SMatthew Ahrens packed_size, packed_size, 6); 17359c3fd121SMatthew Ahrens 17369c3fd121SMatthew Ahrens zio_cksum_t cksum; 17379c3fd121SMatthew Ahrens fletcher_4_native(compressed, compressed_size, NULL, &cksum); 17389c3fd121SMatthew Ahrens 17399c3fd121SMatthew Ahrens str = kmem_alloc(compressed_size * 2 + 1, KM_SLEEP); 17409c3fd121SMatthew Ahrens for (int i = 0; i < compressed_size; i++) { 17419c3fd121SMatthew Ahrens (void) sprintf(str + i * 2, "%02x", compressed[i]); 17429c3fd121SMatthew Ahrens } 17439c3fd121SMatthew Ahrens str[compressed_size * 2] = '\0'; 17449c3fd121SMatthew Ahrens char *propval = kmem_asprintf("%u-%llx-%llx-%s", 17459c3fd121SMatthew Ahrens ZFS_SEND_RESUME_TOKEN_VERSION, 17469c3fd121SMatthew Ahrens (longlong_t)cksum.zc_word[0], 17479c3fd121SMatthew Ahrens (longlong_t)packed_size, str); 17489c3fd121SMatthew Ahrens dsl_prop_nvlist_add_string(nv, 17499c3fd121SMatthew Ahrens ZFS_PROP_RECEIVE_RESUME_TOKEN, propval); 17509c3fd121SMatthew Ahrens kmem_free(packed, packed_size); 17519c3fd121SMatthew Ahrens kmem_free(str, compressed_size * 2 + 1); 17529c3fd121SMatthew Ahrens kmem_free(compressed, packed_size); 17539c3fd121SMatthew Ahrens strfree(propval); 17549c3fd121SMatthew Ahrens } 17559c3fd121SMatthew Ahrens } 17569c3fd121SMatthew Ahrens 1757fa9e4066Sahrens void 1758a2eea2e1Sahrens dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) 1759fa9e4066Sahrens { 17603b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 1761187d6ac0SMatt Ahrens uint64_t refd, avail, uobjs, aobjs, ratio; 1762a9799022Sck 17633b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 17643b2aab18SMatthew Ahrens 1765c1379625SJustin T. Gibbs ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : 1766c1379625SJustin T. Gibbs (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / 1767c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_compressed_bytes); 17684445fffbSMatthew Ahrens 17694445fffbSMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, ratio); 177077372cb0SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, 1771c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes); 17724445fffbSMatthew Ahrens 1773bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 17744445fffbSMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, ratio); 17754445fffbSMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, 1776c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes); 17774445fffbSMatthew Ahrens get_clones_stat(ds, nv); 17784445fffbSMatthew Ahrens } else { 1779b461c746SMatthew Ahrens if (ds->ds_prev != NULL && ds->ds_prev != dp->dp_origin_snap) { 1780b461c746SMatthew Ahrens char buf[MAXNAMELEN]; 1781b461c746SMatthew Ahrens dsl_dataset_name(ds->ds_prev, buf); 1782b461c746SMatthew Ahrens dsl_prop_nvlist_add_string(nv, ZFS_PROP_PREV_SNAP, buf); 1783b461c746SMatthew Ahrens } 1784b461c746SMatthew Ahrens 17854445fffbSMatthew Ahrens dsl_dir_stats(ds->ds_dir, nv); 17864445fffbSMatthew Ahrens } 1787fa9e4066Sahrens 1788a9799022Sck dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); 1789a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); 1790a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); 1791a9799022Sck 1792a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, 1793c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_creation_time); 1794a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, 1795c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_creation_txg); 1796a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, 1797a9799022Sck ds->ds_quota); 1798a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, 1799a9799022Sck ds->ds_reserved); 1800c5904d13Seschrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, 1801c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_guid); 18021d713200SEric Schrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, 1803c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes); 18041d713200SEric Schrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, 18051d713200SEric Schrock ds->ds_object); 180692241e0bSTom Erickson dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, 180792241e0bSTom Erickson ds->ds_userrefs); 1808842727c2SChris Kirby dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, 1809842727c2SChris Kirby DS_IS_DEFER_DESTROY(ds) ? 1 : 0); 1810fa9e4066Sahrens 1811c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { 181219b94df9SMatthew Ahrens uint64_t written, comp, uncomp; 181319b94df9SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 181419b94df9SMatthew Ahrens dsl_dataset_t *prev; 181519b94df9SMatthew Ahrens 181619b94df9SMatthew Ahrens int err = dsl_dataset_hold_obj(dp, 1817c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); 181819b94df9SMatthew Ahrens if (err == 0) { 181919b94df9SMatthew Ahrens err = dsl_dataset_space_written(prev, ds, &written, 182019b94df9SMatthew Ahrens &comp, &uncomp); 182119b94df9SMatthew Ahrens dsl_dataset_rele(prev, FTAG); 182219b94df9SMatthew Ahrens if (err == 0) { 182319b94df9SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, 182419b94df9SMatthew Ahrens written); 182519b94df9SMatthew Ahrens } 182619b94df9SMatthew Ahrens } 182719b94df9SMatthew Ahrens } 18289c3fd121SMatthew Ahrens 18299c3fd121SMatthew Ahrens if (!dsl_dataset_is_snapshot(ds)) { 18309c3fd121SMatthew Ahrens /* 18319c3fd121SMatthew Ahrens * A failed "newfs" (e.g. full) resumable receive leaves 18329c3fd121SMatthew Ahrens * the stats set on this dataset. Check here for the prop. 18339c3fd121SMatthew Ahrens */ 18349c3fd121SMatthew Ahrens get_receive_resume_stats(ds, nv); 18359c3fd121SMatthew Ahrens 18369c3fd121SMatthew Ahrens /* 18379c3fd121SMatthew Ahrens * A failed incremental resumable receive leaves the 18389c3fd121SMatthew Ahrens * stats set on our child named "%recv". Check the child 18399c3fd121SMatthew Ahrens * for the prop. 18409c3fd121SMatthew Ahrens */ 18419c3fd121SMatthew Ahrens char recvname[ZFS_MAXNAMELEN]; 18429c3fd121SMatthew Ahrens dsl_dataset_t *recv_ds; 18439c3fd121SMatthew Ahrens dsl_dataset_name(ds, recvname); 18449c3fd121SMatthew Ahrens (void) strcat(recvname, "/"); 18459c3fd121SMatthew Ahrens (void) strcat(recvname, recv_clone_name); 18469c3fd121SMatthew Ahrens if (dsl_dataset_hold(dp, recvname, FTAG, &recv_ds) == 0) { 18479c3fd121SMatthew Ahrens get_receive_resume_stats(recv_ds, nv); 18489c3fd121SMatthew Ahrens dsl_dataset_rele(recv_ds, FTAG); 18499c3fd121SMatthew Ahrens } 18509c3fd121SMatthew Ahrens } 1851fa9e4066Sahrens } 1852fa9e4066Sahrens 1853a2eea2e1Sahrens void 1854a2eea2e1Sahrens dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) 1855a2eea2e1Sahrens { 18563b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 18573b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 18583b2aab18SMatthew Ahrens 1859c1379625SJustin T. Gibbs stat->dds_creation_txg = dsl_dataset_phys(ds)->ds_creation_txg; 1860c1379625SJustin T. Gibbs stat->dds_inconsistent = 1861c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT; 1862c1379625SJustin T. Gibbs stat->dds_guid = dsl_dataset_phys(ds)->ds_guid; 18634445fffbSMatthew Ahrens stat->dds_origin[0] = '\0'; 1864bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 1865a2eea2e1Sahrens stat->dds_is_snapshot = B_TRUE; 1866c1379625SJustin T. Gibbs stat->dds_num_clones = 1867c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_num_children - 1; 1868ebedde84SEric Taylor } else { 1869ebedde84SEric Taylor stat->dds_is_snapshot = B_FALSE; 1870ebedde84SEric Taylor stat->dds_num_clones = 0; 1871a2eea2e1Sahrens 18724445fffbSMatthew Ahrens if (dsl_dir_is_clone(ds->ds_dir)) { 18734445fffbSMatthew Ahrens dsl_dataset_t *ods; 1874a2eea2e1Sahrens 18753b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 1876c1379625SJustin T. Gibbs dsl_dir_phys(ds->ds_dir)->dd_origin_obj, 1877c1379625SJustin T. Gibbs FTAG, &ods)); 18784445fffbSMatthew Ahrens dsl_dataset_name(ods, stat->dds_origin); 18793b2aab18SMatthew Ahrens dsl_dataset_rele(ods, FTAG); 18804445fffbSMatthew Ahrens } 1881a2eea2e1Sahrens } 1882a2eea2e1Sahrens } 1883a2eea2e1Sahrens 1884a2eea2e1Sahrens uint64_t 1885a2eea2e1Sahrens dsl_dataset_fsid_guid(dsl_dataset_t *ds) 1886a2eea2e1Sahrens { 188791ebeef5Sahrens return (ds->ds_fsid_guid); 1888a2eea2e1Sahrens } 1889a2eea2e1Sahrens 1890a2eea2e1Sahrens void 1891a2eea2e1Sahrens dsl_dataset_space(dsl_dataset_t *ds, 1892a2eea2e1Sahrens uint64_t *refdbytesp, uint64_t *availbytesp, 1893a2eea2e1Sahrens uint64_t *usedobjsp, uint64_t *availobjsp) 1894fa9e4066Sahrens { 1895c1379625SJustin T. Gibbs *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; 1896a2eea2e1Sahrens *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); 1897c1379625SJustin T. Gibbs if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) 1898c1379625SJustin T. Gibbs *availbytesp += 1899c1379625SJustin T. Gibbs ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; 1900a9799022Sck if (ds->ds_quota != 0) { 1901a9799022Sck /* 1902a9799022Sck * Adjust available bytes according to refquota 1903a9799022Sck */ 1904a9799022Sck if (*refdbytesp < ds->ds_quota) 1905a9799022Sck *availbytesp = MIN(*availbytesp, 1906a9799022Sck ds->ds_quota - *refdbytesp); 1907a9799022Sck else 1908a9799022Sck *availbytesp = 0; 1909a9799022Sck } 1910c1379625SJustin T. Gibbs *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); 1911a2eea2e1Sahrens *availobjsp = DN_MAX_OBJECT - *usedobjsp; 1912fa9e4066Sahrens } 1913fa9e4066Sahrens 1914f18faf3fSek boolean_t 191534f2f8cfSMatthew Ahrens dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) 1916f18faf3fSek { 1917f18faf3fSek dsl_pool_t *dp = ds->ds_dir->dd_pool; 1918f18faf3fSek 19193b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 192034f2f8cfSMatthew Ahrens if (snap == NULL) 1921f18faf3fSek return (B_FALSE); 1922c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_bp.blk_birth > 1923c1379625SJustin T. Gibbs dsl_dataset_phys(snap)->ds_creation_txg) { 192434f2f8cfSMatthew Ahrens objset_t *os, *os_snap; 19256e0cbcaaSMatthew Ahrens /* 19266e0cbcaaSMatthew Ahrens * It may be that only the ZIL differs, because it was 19276e0cbcaaSMatthew Ahrens * reset in the head. Don't count that as being 19286e0cbcaaSMatthew Ahrens * modified. 19296e0cbcaaSMatthew Ahrens */ 19306e0cbcaaSMatthew Ahrens if (dmu_objset_from_ds(ds, &os) != 0) 19316e0cbcaaSMatthew Ahrens return (B_TRUE); 193234f2f8cfSMatthew Ahrens if (dmu_objset_from_ds(snap, &os_snap) != 0) 19336e0cbcaaSMatthew Ahrens return (B_TRUE); 19346e0cbcaaSMatthew Ahrens return (bcmp(&os->os_phys->os_meta_dnode, 193534f2f8cfSMatthew Ahrens &os_snap->os_phys->os_meta_dnode, 19366e0cbcaaSMatthew Ahrens sizeof (os->os_phys->os_meta_dnode)) != 0); 19376e0cbcaaSMatthew Ahrens } 1938f18faf3fSek return (B_FALSE); 1939f18faf3fSek } 1940f18faf3fSek 19413b2aab18SMatthew Ahrens typedef struct dsl_dataset_rename_snapshot_arg { 19423b2aab18SMatthew Ahrens const char *ddrsa_fsname; 19433b2aab18SMatthew Ahrens const char *ddrsa_oldsnapname; 19443b2aab18SMatthew Ahrens const char *ddrsa_newsnapname; 19453b2aab18SMatthew Ahrens boolean_t ddrsa_recursive; 19463b2aab18SMatthew Ahrens dmu_tx_t *ddrsa_tx; 19473b2aab18SMatthew Ahrens } dsl_dataset_rename_snapshot_arg_t; 19483b2aab18SMatthew Ahrens 19491d452cf5Sahrens /* ARGSUSED */ 1950fa9e4066Sahrens static int 19513b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, 19523b2aab18SMatthew Ahrens dsl_dataset_t *hds, void *arg) 1953fa9e4066Sahrens { 19543b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 19553b2aab18SMatthew Ahrens int error; 1956fa9e4066Sahrens uint64_t val; 1957fa9e4066Sahrens 19583b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); 19593b2aab18SMatthew Ahrens if (error != 0) { 19603b2aab18SMatthew Ahrens /* ignore nonexistent snapshots */ 19613b2aab18SMatthew Ahrens return (error == ENOENT ? 0 : error); 19623b2aab18SMatthew Ahrens } 19631d452cf5Sahrens 19643b2aab18SMatthew Ahrens /* new name should not exist */ 19653b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); 19663b2aab18SMatthew Ahrens if (error == 0) 1967be6fd75aSMatthew Ahrens error = SET_ERROR(EEXIST); 19683b2aab18SMatthew Ahrens else if (error == ENOENT) 19693b2aab18SMatthew Ahrens error = 0; 1970cdf5b4caSmmusante 1971cdf5b4caSmmusante /* dataset name + 1 for the "@" + the new snapshot name must fit */ 19723b2aab18SMatthew Ahrens if (dsl_dir_namelen(hds->ds_dir) + 1 + 19733b2aab18SMatthew Ahrens strlen(ddrsa->ddrsa_newsnapname) >= MAXNAMELEN) 1974be6fd75aSMatthew Ahrens error = SET_ERROR(ENAMETOOLONG); 1975cdf5b4caSmmusante 19763b2aab18SMatthew Ahrens return (error); 19771d452cf5Sahrens } 1978fa9e4066Sahrens 19793b2aab18SMatthew Ahrens static int 19803b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) 19811d452cf5Sahrens { 19823b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 19833b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 19841d452cf5Sahrens dsl_dataset_t *hds; 19853b2aab18SMatthew Ahrens int error; 1986fa9e4066Sahrens 19873b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); 19883b2aab18SMatthew Ahrens if (error != 0) 19893b2aab18SMatthew Ahrens return (error); 1990fa9e4066Sahrens 19913b2aab18SMatthew Ahrens if (ddrsa->ddrsa_recursive) { 19923b2aab18SMatthew Ahrens error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, 19933b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check_impl, ddrsa, 19943b2aab18SMatthew Ahrens DS_FIND_CHILDREN); 19953b2aab18SMatthew Ahrens } else { 19963b2aab18SMatthew Ahrens error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); 19973b2aab18SMatthew Ahrens } 1998745cd3c5Smaybee dsl_dataset_rele(hds, FTAG); 19993b2aab18SMatthew Ahrens return (error); 2000fa9e4066Sahrens } 2001fa9e4066Sahrens 2002cdf5b4caSmmusante static int 20033b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, 20043b2aab18SMatthew Ahrens dsl_dataset_t *hds, void *arg) 2005cdf5b4caSmmusante { 20063b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 20073b2aab18SMatthew Ahrens dsl_dataset_t *ds; 20083b2aab18SMatthew Ahrens uint64_t val; 20093b2aab18SMatthew Ahrens dmu_tx_t *tx = ddrsa->ddrsa_tx; 20103b2aab18SMatthew Ahrens int error; 2011ecd6cf80Smarks 20123b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); 20133b2aab18SMatthew Ahrens ASSERT(error == 0 || error == ENOENT); 20143b2aab18SMatthew Ahrens if (error == ENOENT) { 20153b2aab18SMatthew Ahrens /* ignore nonexistent snapshots */ 20163b2aab18SMatthew Ahrens return (0); 2017ecd6cf80Smarks } 2018ecd6cf80Smarks 20193b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); 20203b2aab18SMatthew Ahrens 20213b2aab18SMatthew Ahrens /* log before we change the name */ 20223b2aab18SMatthew Ahrens spa_history_log_internal_ds(ds, "rename", tx, 20233b2aab18SMatthew Ahrens "-> @%s", ddrsa->ddrsa_newsnapname); 2024cdf5b4caSmmusante 2025a2afb611SJerry Jelinek VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, 2026a2afb611SJerry Jelinek B_FALSE)); 20273b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 20283b2aab18SMatthew Ahrens (void) strcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname); 20293b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 2030c1379625SJustin T. Gibbs VERIFY0(zap_add(dp->dp_meta_objset, 2031c1379625SJustin T. Gibbs dsl_dataset_phys(hds)->ds_snapnames_zapobj, 20323b2aab18SMatthew Ahrens ds->ds_snapname, 8, 1, &ds->ds_object, tx)); 2033cdf5b4caSmmusante 20343b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2035cdf5b4caSmmusante return (0); 2036cdf5b4caSmmusante } 2037cdf5b4caSmmusante 20383b2aab18SMatthew Ahrens static void 20393b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) 2040cdf5b4caSmmusante { 20413b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 20423b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 20433b2aab18SMatthew Ahrens dsl_dataset_t *hds; 2044cdf5b4caSmmusante 20453b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); 20463b2aab18SMatthew Ahrens ddrsa->ddrsa_tx = tx; 20473b2aab18SMatthew Ahrens if (ddrsa->ddrsa_recursive) { 20483b2aab18SMatthew Ahrens VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, 20493b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync_impl, ddrsa, 20503b2aab18SMatthew Ahrens DS_FIND_CHILDREN)); 20513b2aab18SMatthew Ahrens } else { 20523b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); 2053cdf5b4caSmmusante } 20543b2aab18SMatthew Ahrens dsl_dataset_rele(hds, FTAG); 2055cdf5b4caSmmusante } 2056cdf5b4caSmmusante 20573b2aab18SMatthew Ahrens int 20583b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot(const char *fsname, 20593b2aab18SMatthew Ahrens const char *oldsnapname, const char *newsnapname, boolean_t recursive) 20603a5a36beSmmusante { 20613b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t ddrsa; 20623a5a36beSmmusante 20633b2aab18SMatthew Ahrens ddrsa.ddrsa_fsname = fsname; 20643b2aab18SMatthew Ahrens ddrsa.ddrsa_oldsnapname = oldsnapname; 20653b2aab18SMatthew Ahrens ddrsa.ddrsa_newsnapname = newsnapname; 20663b2aab18SMatthew Ahrens ddrsa.ddrsa_recursive = recursive; 20673a5a36beSmmusante 20683b2aab18SMatthew Ahrens return (dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, 20697d46dc6cSMatthew Ahrens dsl_dataset_rename_snapshot_sync, &ddrsa, 20707d46dc6cSMatthew Ahrens 1, ZFS_SPACE_CHECK_RESERVED)); 20713a5a36beSmmusante } 20723a5a36beSmmusante 207391948b51SKeith M Wesolowski /* 207491948b51SKeith M Wesolowski * If we're doing an ownership handoff, we need to make sure that there is 207591948b51SKeith M Wesolowski * only one long hold on the dataset. We're not allowed to change anything here 207691948b51SKeith M Wesolowski * so we don't permanently release the long hold or regular hold here. We want 207791948b51SKeith M Wesolowski * to do this only when syncing to avoid the dataset unexpectedly going away 207891948b51SKeith M Wesolowski * when we release the long hold. 207991948b51SKeith M Wesolowski */ 208091948b51SKeith M Wesolowski static int 208191948b51SKeith M Wesolowski dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) 208291948b51SKeith M Wesolowski { 208391948b51SKeith M Wesolowski boolean_t held; 208491948b51SKeith M Wesolowski 208591948b51SKeith M Wesolowski if (!dmu_tx_is_syncing(tx)) 208691948b51SKeith M Wesolowski return (0); 208791948b51SKeith M Wesolowski 208891948b51SKeith M Wesolowski if (owner != NULL) { 208991948b51SKeith M Wesolowski VERIFY3P(ds->ds_owner, ==, owner); 209091948b51SKeith M Wesolowski dsl_dataset_long_rele(ds, owner); 209191948b51SKeith M Wesolowski } 209291948b51SKeith M Wesolowski 209391948b51SKeith M Wesolowski held = dsl_dataset_long_held(ds); 209491948b51SKeith M Wesolowski 209591948b51SKeith M Wesolowski if (owner != NULL) 209691948b51SKeith M Wesolowski dsl_dataset_long_hold(ds, owner); 209791948b51SKeith M Wesolowski 209891948b51SKeith M Wesolowski if (held) 209991948b51SKeith M Wesolowski return (SET_ERROR(EBUSY)); 210091948b51SKeith M Wesolowski 210191948b51SKeith M Wesolowski return (0); 210291948b51SKeith M Wesolowski } 210391948b51SKeith M Wesolowski 210491948b51SKeith M Wesolowski typedef struct dsl_dataset_rollback_arg { 210591948b51SKeith M Wesolowski const char *ddra_fsname; 210691948b51SKeith M Wesolowski void *ddra_owner; 2107a7027df1SMatthew Ahrens nvlist_t *ddra_result; 210891948b51SKeith M Wesolowski } dsl_dataset_rollback_arg_t; 210991948b51SKeith M Wesolowski 21103b2aab18SMatthew Ahrens static int 21113b2aab18SMatthew Ahrens dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) 2112fa9e4066Sahrens { 211391948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t *ddra = arg; 21143b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 21151d452cf5Sahrens dsl_dataset_t *ds; 21163b2aab18SMatthew Ahrens int64_t unused_refres_delta; 21173b2aab18SMatthew Ahrens int error; 2118fa9e4066Sahrens 211991948b51SKeith M Wesolowski error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); 21203b2aab18SMatthew Ahrens if (error != 0) 21213b2aab18SMatthew Ahrens return (error); 2122370c1af0SSanjeev Bagewadi 21233b2aab18SMatthew Ahrens /* must not be a snapshot */ 2124bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 21253b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2126be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 21273b2aab18SMatthew Ahrens } 21283a5a36beSmmusante 21293b2aab18SMatthew Ahrens /* must have a most recent snapshot */ 2130c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { 21313b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2132be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 21333b2aab18SMatthew Ahrens } 21343a5a36beSmmusante 213578f17100SMatthew Ahrens /* must not have any bookmarks after the most recent snapshot */ 213678f17100SMatthew Ahrens nvlist_t *proprequest = fnvlist_alloc(); 213778f17100SMatthew Ahrens fnvlist_add_boolean(proprequest, zfs_prop_to_name(ZFS_PROP_CREATETXG)); 213878f17100SMatthew Ahrens nvlist_t *bookmarks = fnvlist_alloc(); 213978f17100SMatthew Ahrens error = dsl_get_bookmarks_impl(ds, proprequest, bookmarks); 214078f17100SMatthew Ahrens fnvlist_free(proprequest); 214178f17100SMatthew Ahrens if (error != 0) 214278f17100SMatthew Ahrens return (error); 214378f17100SMatthew Ahrens for (nvpair_t *pair = nvlist_next_nvpair(bookmarks, NULL); 214478f17100SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(bookmarks, pair)) { 214578f17100SMatthew Ahrens nvlist_t *valuenv = 214678f17100SMatthew Ahrens fnvlist_lookup_nvlist(fnvpair_value_nvlist(pair), 214778f17100SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_CREATETXG)); 214878f17100SMatthew Ahrens uint64_t createtxg = fnvlist_lookup_uint64(valuenv, "value"); 2149c1379625SJustin T. Gibbs if (createtxg > dsl_dataset_phys(ds)->ds_prev_snap_txg) { 215078f17100SMatthew Ahrens fnvlist_free(bookmarks); 215178f17100SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 215278f17100SMatthew Ahrens return (SET_ERROR(EEXIST)); 215378f17100SMatthew Ahrens } 215478f17100SMatthew Ahrens } 215578f17100SMatthew Ahrens fnvlist_free(bookmarks); 215678f17100SMatthew Ahrens 215791948b51SKeith M Wesolowski error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); 215891948b51SKeith M Wesolowski if (error != 0) { 21593b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 216091948b51SKeith M Wesolowski return (error); 21613b2aab18SMatthew Ahrens } 21623b2aab18SMatthew Ahrens 21633b2aab18SMatthew Ahrens /* 21643b2aab18SMatthew Ahrens * Check if the snap we are rolling back to uses more than 21653b2aab18SMatthew Ahrens * the refquota. 21663b2aab18SMatthew Ahrens */ 21673b2aab18SMatthew Ahrens if (ds->ds_quota != 0 && 2168c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { 21693b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2170be6fd75aSMatthew Ahrens return (SET_ERROR(EDQUOT)); 2171fa9e4066Sahrens } 2172370c1af0SSanjeev Bagewadi 21733b2aab18SMatthew Ahrens /* 21743b2aab18SMatthew Ahrens * When we do the clone swap, we will temporarily use more space 21753b2aab18SMatthew Ahrens * due to the refreservation (the head will no longer have any 21763b2aab18SMatthew Ahrens * unique space, so the entire amount of the refreservation will need 21773b2aab18SMatthew Ahrens * to be free). We will immediately destroy the clone, freeing 21783b2aab18SMatthew Ahrens * this space, but the freeing happens over many txg's. 21793b2aab18SMatthew Ahrens */ 21803b2aab18SMatthew Ahrens unused_refres_delta = (int64_t)MIN(ds->ds_reserved, 2181c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes); 21823b2aab18SMatthew Ahrens 21833b2aab18SMatthew Ahrens if (unused_refres_delta > 0 && 21843b2aab18SMatthew Ahrens unused_refres_delta > 21853b2aab18SMatthew Ahrens dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { 21863b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2187be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 2188fa9e4066Sahrens } 2189fa9e4066Sahrens 21903b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 21913b2aab18SMatthew Ahrens return (0); 21923b2aab18SMatthew Ahrens } 21931d452cf5Sahrens 21943b2aab18SMatthew Ahrens static void 21953b2aab18SMatthew Ahrens dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) 21963b2aab18SMatthew Ahrens { 219791948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t *ddra = arg; 21983b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 21993b2aab18SMatthew Ahrens dsl_dataset_t *ds, *clone; 22003b2aab18SMatthew Ahrens uint64_t cloneobj; 2201a7027df1SMatthew Ahrens char namebuf[ZFS_MAXNAMELEN]; 22021d452cf5Sahrens 220391948b51SKeith M Wesolowski VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); 22041d452cf5Sahrens 2205a7027df1SMatthew Ahrens dsl_dataset_name(ds->ds_prev, namebuf); 2206a7027df1SMatthew Ahrens fnvlist_add_string(ddra->ddra_result, "target", namebuf); 2207a7027df1SMatthew Ahrens 22083b2aab18SMatthew Ahrens cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", 22093b2aab18SMatthew Ahrens ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, tx); 22101d452cf5Sahrens 22113b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); 22121d452cf5Sahrens 22133b2aab18SMatthew Ahrens dsl_dataset_clone_swap_sync_impl(clone, ds, tx); 22143b2aab18SMatthew Ahrens dsl_dataset_zero_zil(ds, tx); 22153b2aab18SMatthew Ahrens 22163b2aab18SMatthew Ahrens dsl_destroy_head_sync_impl(clone, tx); 22173b2aab18SMatthew Ahrens 22183b2aab18SMatthew Ahrens dsl_dataset_rele(clone, FTAG); 22193b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 22203b2aab18SMatthew Ahrens } 22213b2aab18SMatthew Ahrens 222291948b51SKeith M Wesolowski /* 2223a7027df1SMatthew Ahrens * Rolls back the given filesystem or volume to the most recent snapshot. 2224a7027df1SMatthew Ahrens * The name of the most recent snapshot will be returned under key "target" 2225a7027df1SMatthew Ahrens * in the result nvlist. 222691948b51SKeith M Wesolowski * 2227a7027df1SMatthew Ahrens * If owner != NULL: 222891948b51SKeith M Wesolowski * - The existing dataset MUST be owned by the specified owner at entry 222991948b51SKeith M Wesolowski * - Upon return, dataset will still be held by the same owner, whether we 223091948b51SKeith M Wesolowski * succeed or not. 223191948b51SKeith M Wesolowski * 223291948b51SKeith M Wesolowski * This mode is required any time the existing filesystem is mounted. See 223391948b51SKeith M Wesolowski * notes above zfs_suspend_fs() for further details. 223491948b51SKeith M Wesolowski */ 22353b2aab18SMatthew Ahrens int 2236a7027df1SMatthew Ahrens dsl_dataset_rollback(const char *fsname, void *owner, nvlist_t *result) 22373b2aab18SMatthew Ahrens { 223891948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t ddra; 223991948b51SKeith M Wesolowski 224091948b51SKeith M Wesolowski ddra.ddra_fsname = fsname; 224191948b51SKeith M Wesolowski ddra.ddra_owner = owner; 2242a7027df1SMatthew Ahrens ddra.ddra_result = result; 224391948b51SKeith M Wesolowski 22443b2aab18SMatthew Ahrens return (dsl_sync_task(fsname, dsl_dataset_rollback_check, 22457d46dc6cSMatthew Ahrens dsl_dataset_rollback_sync, &ddra, 22467d46dc6cSMatthew Ahrens 1, ZFS_SPACE_CHECK_RESERVED)); 2247fa9e4066Sahrens } 224899653d4eSeschrock 2249088f3894Sahrens struct promotenode { 2250745cd3c5Smaybee list_node_t link; 2251745cd3c5Smaybee dsl_dataset_t *ds; 2252745cd3c5Smaybee }; 2253745cd3c5Smaybee 22543b2aab18SMatthew Ahrens typedef struct dsl_dataset_promote_arg { 22553b2aab18SMatthew Ahrens const char *ddpa_clonename; 22563b2aab18SMatthew Ahrens dsl_dataset_t *ddpa_clone; 225774e7dc98SMatthew Ahrens list_t shared_snaps, origin_snaps, clone_snaps; 22583b2aab18SMatthew Ahrens dsl_dataset_t *origin_origin; /* origin of the origin */ 225974e7dc98SMatthew Ahrens uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap; 2260681d9761SEric Taylor char *err_ds; 2261a2afb611SJerry Jelinek cred_t *cr; 22623b2aab18SMatthew Ahrens } dsl_dataset_promote_arg_t; 22631d452cf5Sahrens 226474e7dc98SMatthew Ahrens static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); 22653b2aab18SMatthew Ahrens static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, 22663b2aab18SMatthew Ahrens void *tag); 22673b2aab18SMatthew Ahrens static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); 226874e7dc98SMatthew Ahrens 226999653d4eSeschrock static int 22703b2aab18SMatthew Ahrens dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) 227199653d4eSeschrock { 22723b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t *ddpa = arg; 22733b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 22743b2aab18SMatthew Ahrens dsl_dataset_t *hds; 22753b2aab18SMatthew Ahrens struct promotenode *snap; 22763b2aab18SMatthew Ahrens dsl_dataset_t *origin_ds; 2277745cd3c5Smaybee int err; 2278cde58dbcSMatthew Ahrens uint64_t unused; 2279a2afb611SJerry Jelinek uint64_t ss_mv_cnt; 2280cb5842f8SAndriy Gapon size_t max_snap_len; 22811d452cf5Sahrens 22823b2aab18SMatthew Ahrens err = promote_hold(ddpa, dp, FTAG); 22833b2aab18SMatthew Ahrens if (err != 0) 22843b2aab18SMatthew Ahrens return (err); 228599653d4eSeschrock 22863b2aab18SMatthew Ahrens hds = ddpa->ddpa_clone; 2287cb5842f8SAndriy Gapon max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; 22881d452cf5Sahrens 2289c1379625SJustin T. Gibbs if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { 22903b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 2291be6fd75aSMatthew Ahrens return (SET_ERROR(EXDEV)); 22923b2aab18SMatthew Ahrens } 22933b2aab18SMatthew Ahrens 22943b2aab18SMatthew Ahrens /* 22953b2aab18SMatthew Ahrens * Compute and check the amount of space to transfer. Since this is 22963b2aab18SMatthew Ahrens * so expensive, don't do the preliminary check. 22973b2aab18SMatthew Ahrens */ 22983b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) { 22993b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 23003b2aab18SMatthew Ahrens return (0); 23013b2aab18SMatthew Ahrens } 23023b2aab18SMatthew Ahrens 23033b2aab18SMatthew Ahrens snap = list_head(&ddpa->shared_snaps); 23043b2aab18SMatthew Ahrens origin_ds = snap->ds; 230599653d4eSeschrock 23063cb34c60Sahrens /* compute origin's new unique space */ 23073b2aab18SMatthew Ahrens snap = list_tail(&ddpa->clone_snaps); 2308c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, 2309c1379625SJustin T. Gibbs origin_ds->ds_object); 2310cde58dbcSMatthew Ahrens dsl_deadlist_space_range(&snap->ds->ds_deadlist, 2311c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, 23123b2aab18SMatthew Ahrens &ddpa->unique, &unused, &unused); 231399653d4eSeschrock 2314745cd3c5Smaybee /* 2315745cd3c5Smaybee * Walk the snapshots that we are moving 2316745cd3c5Smaybee * 231774e7dc98SMatthew Ahrens * Compute space to transfer. Consider the incremental changes 23183b2aab18SMatthew Ahrens * to used by each snapshot: 231974e7dc98SMatthew Ahrens * (my used) = (prev's used) + (blocks born) - (blocks killed) 232074e7dc98SMatthew Ahrens * So each snapshot gave birth to: 232174e7dc98SMatthew Ahrens * (blocks born) = (my used) - (prev's used) + (blocks killed) 2322745cd3c5Smaybee * So a sequence would look like: 232374e7dc98SMatthew Ahrens * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) 2324745cd3c5Smaybee * Which simplifies to: 232574e7dc98SMatthew Ahrens * uN + kN + kN-1 + ... + k1 + k0 2326745cd3c5Smaybee * Note however, if we stop before we reach the ORIGIN we get: 232774e7dc98SMatthew Ahrens * uN + kN + kN-1 + ... + kM - uM-1 2328745cd3c5Smaybee */ 2329a2afb611SJerry Jelinek ss_mv_cnt = 0; 2330c1379625SJustin T. Gibbs ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; 2331c1379625SJustin T. Gibbs ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; 2332c1379625SJustin T. Gibbs ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; 23333b2aab18SMatthew Ahrens for (snap = list_head(&ddpa->shared_snaps); snap; 23343b2aab18SMatthew Ahrens snap = list_next(&ddpa->shared_snaps, snap)) { 233599653d4eSeschrock uint64_t val, dlused, dlcomp, dluncomp; 2336745cd3c5Smaybee dsl_dataset_t *ds = snap->ds; 233799653d4eSeschrock 2338a2afb611SJerry Jelinek ss_mv_cnt++; 2339a2afb611SJerry Jelinek 23403b2aab18SMatthew Ahrens /* 23413b2aab18SMatthew Ahrens * If there are long holds, we won't be able to evict 23423b2aab18SMatthew Ahrens * the objset. 23433b2aab18SMatthew Ahrens */ 23443b2aab18SMatthew Ahrens if (dsl_dataset_long_held(ds)) { 2345be6fd75aSMatthew Ahrens err = SET_ERROR(EBUSY); 23463b2aab18SMatthew Ahrens goto out; 23473b2aab18SMatthew Ahrens } 23483b2aab18SMatthew Ahrens 234999653d4eSeschrock /* Check that the snapshot name does not conflict */ 23503b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 2351cb5842f8SAndriy Gapon if (strlen(ds->ds_snapname) >= max_snap_len) { 2352cb5842f8SAndriy Gapon err = SET_ERROR(ENAMETOOLONG); 2353cb5842f8SAndriy Gapon goto out; 2354cb5842f8SAndriy Gapon } 2355745cd3c5Smaybee err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); 2356681d9761SEric Taylor if (err == 0) { 23573b2aab18SMatthew Ahrens (void) strcpy(ddpa->err_ds, snap->ds->ds_snapname); 2358be6fd75aSMatthew Ahrens err = SET_ERROR(EEXIST); 2359681d9761SEric Taylor goto out; 2360681d9761SEric Taylor } 2361745cd3c5Smaybee if (err != ENOENT) 2362681d9761SEric Taylor goto out; 236399653d4eSeschrock 2364745cd3c5Smaybee /* The very first snapshot does not have a deadlist */ 2365c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) 236674e7dc98SMatthew Ahrens continue; 236774e7dc98SMatthew Ahrens 2368cde58dbcSMatthew Ahrens dsl_deadlist_space(&ds->ds_deadlist, 2369cde58dbcSMatthew Ahrens &dlused, &dlcomp, &dluncomp); 23703b2aab18SMatthew Ahrens ddpa->used += dlused; 23713b2aab18SMatthew Ahrens ddpa->comp += dlcomp; 23723b2aab18SMatthew Ahrens ddpa->uncomp += dluncomp; 237374e7dc98SMatthew Ahrens } 2374745cd3c5Smaybee 2375745cd3c5Smaybee /* 2376745cd3c5Smaybee * If we are a clone of a clone then we never reached ORIGIN, 2377745cd3c5Smaybee * so we need to subtract out the clone origin's used space. 2378745cd3c5Smaybee */ 23793b2aab18SMatthew Ahrens if (ddpa->origin_origin) { 2380c1379625SJustin T. Gibbs ddpa->used -= 2381c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; 2382c1379625SJustin T. Gibbs ddpa->comp -= 2383c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; 23843b2aab18SMatthew Ahrens ddpa->uncomp -= 2385c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)-> 2386c1379625SJustin T. Gibbs ds_uncompressed_bytes; 238799653d4eSeschrock } 238899653d4eSeschrock 2389a2afb611SJerry Jelinek /* Check that there is enough space and limit headroom here */ 239074e7dc98SMatthew Ahrens err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, 2391a2afb611SJerry Jelinek 0, ss_mv_cnt, ddpa->used, ddpa->cr); 23923b2aab18SMatthew Ahrens if (err != 0) 23933b2aab18SMatthew Ahrens goto out; 239474e7dc98SMatthew Ahrens 239574e7dc98SMatthew Ahrens /* 239674e7dc98SMatthew Ahrens * Compute the amounts of space that will be used by snapshots 239774e7dc98SMatthew Ahrens * after the promotion (for both origin and clone). For each, 239874e7dc98SMatthew Ahrens * it is the amount of space that will be on all of their 239974e7dc98SMatthew Ahrens * deadlists (that was not born before their new origin). 240074e7dc98SMatthew Ahrens */ 2401c1379625SJustin T. Gibbs if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { 240274e7dc98SMatthew Ahrens uint64_t space; 240374e7dc98SMatthew Ahrens 240474e7dc98SMatthew Ahrens /* 240574e7dc98SMatthew Ahrens * Note, typically this will not be a clone of a clone, 24063f9d6ad7SLin Ling * so dd_origin_txg will be < TXG_INITIAL, so 2407cde58dbcSMatthew Ahrens * these snaplist_space() -> dsl_deadlist_space_range() 240874e7dc98SMatthew Ahrens * calls will be fast because they do not have to 240974e7dc98SMatthew Ahrens * iterate over all bps. 241074e7dc98SMatthew Ahrens */ 24113b2aab18SMatthew Ahrens snap = list_head(&ddpa->origin_snaps); 24123b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->shared_snaps, 24133b2aab18SMatthew Ahrens snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); 24143b2aab18SMatthew Ahrens if (err != 0) 24153b2aab18SMatthew Ahrens goto out; 241674e7dc98SMatthew Ahrens 24173b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->clone_snaps, 24183f9d6ad7SLin Ling snap->ds->ds_dir->dd_origin_txg, &space); 24193b2aab18SMatthew Ahrens if (err != 0) 24203b2aab18SMatthew Ahrens goto out; 24213b2aab18SMatthew Ahrens ddpa->cloneusedsnap += space; 242274e7dc98SMatthew Ahrens } 2423c1379625SJustin T. Gibbs if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & 2424c1379625SJustin T. Gibbs DD_FLAG_USED_BREAKDOWN) { 24253b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->origin_snaps, 2426c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_creation_txg, 2427c1379625SJustin T. Gibbs &ddpa->originusedsnap); 24283b2aab18SMatthew Ahrens if (err != 0) 24293b2aab18SMatthew Ahrens goto out; 2430745cd3c5Smaybee } 24311d452cf5Sahrens 2432681d9761SEric Taylor out: 24333b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 2434681d9761SEric Taylor return (err); 24351d452cf5Sahrens } 243699653d4eSeschrock 24371d452cf5Sahrens static void 24383b2aab18SMatthew Ahrens dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) 24391d452cf5Sahrens { 24403b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t *ddpa = arg; 24413b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 24423b2aab18SMatthew Ahrens dsl_dataset_t *hds; 24433b2aab18SMatthew Ahrens struct promotenode *snap; 24443b2aab18SMatthew Ahrens dsl_dataset_t *origin_ds; 24453b2aab18SMatthew Ahrens dsl_dataset_t *origin_head; 24463b2aab18SMatthew Ahrens dsl_dir_t *dd; 24473cb34c60Sahrens dsl_dir_t *odd = NULL; 2448088f3894Sahrens uint64_t oldnext_obj; 244974e7dc98SMatthew Ahrens int64_t delta; 24501d452cf5Sahrens 24513b2aab18SMatthew Ahrens VERIFY0(promote_hold(ddpa, dp, FTAG)); 24523b2aab18SMatthew Ahrens hds = ddpa->ddpa_clone; 24533b2aab18SMatthew Ahrens 2454c1379625SJustin T. Gibbs ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); 24551d452cf5Sahrens 24563b2aab18SMatthew Ahrens snap = list_head(&ddpa->shared_snaps); 24573b2aab18SMatthew Ahrens origin_ds = snap->ds; 24583b2aab18SMatthew Ahrens dd = hds->ds_dir; 24593b2aab18SMatthew Ahrens 24603b2aab18SMatthew Ahrens snap = list_head(&ddpa->origin_snaps); 246174e7dc98SMatthew Ahrens origin_head = snap->ds; 246274e7dc98SMatthew Ahrens 24630b69c2f0Sahrens /* 24643cb34c60Sahrens * We need to explicitly open odd, since origin_ds's dd will be 24650b69c2f0Sahrens * changing. 24660b69c2f0Sahrens */ 24673b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, 24683cb34c60Sahrens NULL, FTAG, &odd)); 246999653d4eSeschrock 2470745cd3c5Smaybee /* change origin's next snap */ 2471745cd3c5Smaybee dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); 2472c1379625SJustin T. Gibbs oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; 24733b2aab18SMatthew Ahrens snap = list_tail(&ddpa->clone_snaps); 2474c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, 2475c1379625SJustin T. Gibbs origin_ds->ds_object); 2476c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; 2477745cd3c5Smaybee 2478088f3894Sahrens /* change the origin's next clone */ 2479c1379625SJustin T. Gibbs if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { 24803b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(origin_ds, 24813b2aab18SMatthew Ahrens snap->ds->ds_object, tx); 24823b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2483c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_next_clones_obj, 2484088f3894Sahrens oldnext_obj, tx)); 2485088f3894Sahrens } 2486088f3894Sahrens 2487745cd3c5Smaybee /* change origin */ 2488745cd3c5Smaybee dmu_buf_will_dirty(dd->dd_dbuf, tx); 2489c1379625SJustin T. Gibbs ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); 2490c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; 24913f9d6ad7SLin Ling dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; 2492745cd3c5Smaybee dmu_buf_will_dirty(odd->dd_dbuf, tx); 2493c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; 24943f9d6ad7SLin Ling origin_head->ds_dir->dd_origin_txg = 2495c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_creation_txg; 2496745cd3c5Smaybee 2497cde58dbcSMatthew Ahrens /* change dd_clone entries */ 2498cde58dbcSMatthew Ahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 24993b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 2500c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); 25013b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2502c1379625SJustin T. Gibbs dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, 2503cde58dbcSMatthew Ahrens hds->ds_object, tx)); 2504cde58dbcSMatthew Ahrens 25053b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 2506c1379625SJustin T. Gibbs dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, 2507cde58dbcSMatthew Ahrens origin_head->ds_object, tx)); 2508c1379625SJustin T. Gibbs if (dsl_dir_phys(dd)->dd_clones == 0) { 2509c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones = 2510c1379625SJustin T. Gibbs zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, 2511c1379625SJustin T. Gibbs DMU_OT_NONE, 0, tx); 2512cde58dbcSMatthew Ahrens } 25133b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2514c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); 2515cde58dbcSMatthew Ahrens } 2516cde58dbcSMatthew Ahrens 251799653d4eSeschrock /* move snapshots to this dir */ 25183b2aab18SMatthew Ahrens for (snap = list_head(&ddpa->shared_snaps); snap; 25193b2aab18SMatthew Ahrens snap = list_next(&ddpa->shared_snaps, snap)) { 2520745cd3c5Smaybee dsl_dataset_t *ds = snap->ds; 252199653d4eSeschrock 25223b2aab18SMatthew Ahrens /* 25233b2aab18SMatthew Ahrens * Property callbacks are registered to a particular 25243b2aab18SMatthew Ahrens * dsl_dir. Since ours is changing, evict the objset 25253b2aab18SMatthew Ahrens * so that they will be unregistered from the old dsl_dir. 25263b2aab18SMatthew Ahrens */ 2527503ad85cSMatthew Ahrens if (ds->ds_objset) { 2528503ad85cSMatthew Ahrens dmu_objset_evict(ds->ds_objset); 2529503ad85cSMatthew Ahrens ds->ds_objset = NULL; 25303baa08fcSek } 25313b2aab18SMatthew Ahrens 253299653d4eSeschrock /* move snap name entry */ 25333b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 25343b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_snap_remove(origin_head, 2535a2afb611SJerry Jelinek ds->ds_snapname, tx, B_TRUE)); 25363b2aab18SMatthew Ahrens VERIFY0(zap_add(dp->dp_meta_objset, 2537c1379625SJustin T. Gibbs dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, 253899653d4eSeschrock 8, 1, &ds->ds_object, tx)); 2539a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(hds->ds_dir, 1, 2540a2afb611SJerry Jelinek DD_FIELD_SNAPSHOT_COUNT, tx); 2541cde58dbcSMatthew Ahrens 254299653d4eSeschrock /* change containing dsl_dir */ 254399653d4eSeschrock dmu_buf_will_dirty(ds->ds_dbuf, tx); 2544c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); 2545c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; 25463cb34c60Sahrens ASSERT3P(ds->ds_dir, ==, odd); 25473b2aab18SMatthew Ahrens dsl_dir_rele(ds->ds_dir, ds); 25483b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, 254999653d4eSeschrock NULL, ds, &ds->ds_dir)); 255099653d4eSeschrock 2551cde58dbcSMatthew Ahrens /* move any clone references */ 2552c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_clones_obj && 2553cde58dbcSMatthew Ahrens spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 2554cde58dbcSMatthew Ahrens zap_cursor_t zc; 2555cde58dbcSMatthew Ahrens zap_attribute_t za; 2556cde58dbcSMatthew Ahrens 25573b2aab18SMatthew Ahrens for (zap_cursor_init(&zc, dp->dp_meta_objset, 2558c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_next_clones_obj); 25593b2aab18SMatthew Ahrens zap_cursor_retrieve(&zc, &za) == 0; 25603b2aab18SMatthew Ahrens zap_cursor_advance(&zc)) { 25613b2aab18SMatthew Ahrens dsl_dataset_t *cnds; 25623b2aab18SMatthew Ahrens uint64_t o; 2563a9799022Sck 25643b2aab18SMatthew Ahrens if (za.za_first_integer == oldnext_obj) { 25653b2aab18SMatthew Ahrens /* 25663b2aab18SMatthew Ahrens * We've already moved the 25673b2aab18SMatthew Ahrens * origin's reference. 25683b2aab18SMatthew Ahrens */ 25693b2aab18SMatthew Ahrens continue; 25703b2aab18SMatthew Ahrens } 2571a9799022Sck 25723b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 25733b2aab18SMatthew Ahrens za.za_first_integer, FTAG, &cnds)); 2574c1379625SJustin T. Gibbs o = dsl_dir_phys(cnds->ds_dir)-> 2575c1379625SJustin T. Gibbs dd_head_dataset_obj; 2576a9799022Sck 25773b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 2578c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_clones, o, tx)); 25793b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 2580c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones, o, tx)); 25813b2aab18SMatthew Ahrens dsl_dataset_rele(cnds, FTAG); 25823b2aab18SMatthew Ahrens } 25833b2aab18SMatthew Ahrens zap_cursor_fini(&zc); 25843b2aab18SMatthew Ahrens } 25859082849eSck 25863b2aab18SMatthew Ahrens ASSERT(!dsl_prop_hascb(ds)); 2587a9799022Sck } 2588a9799022Sck 2589a9799022Sck /* 25903b2aab18SMatthew Ahrens * Change space accounting. 25913b2aab18SMatthew Ahrens * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either 25923b2aab18SMatthew Ahrens * both be valid, or both be 0 (resulting in delta == 0). This 25933b2aab18SMatthew Ahrens * is true for each of {clone,origin} independently. 2594a9799022Sck */ 2595a9799022Sck 25963b2aab18SMatthew Ahrens delta = ddpa->cloneusedsnap - 2597c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; 25983b2aab18SMatthew Ahrens ASSERT3S(delta, >=, 0); 25993b2aab18SMatthew Ahrens ASSERT3U(ddpa->used, >=, delta); 26003b2aab18SMatthew Ahrens dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); 26013b2aab18SMatthew Ahrens dsl_dir_diduse_space(dd, DD_USED_HEAD, 26023b2aab18SMatthew Ahrens ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); 26033b2aab18SMatthew Ahrens 26043b2aab18SMatthew Ahrens delta = ddpa->originusedsnap - 2605c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; 26063b2aab18SMatthew Ahrens ASSERT3S(delta, <=, 0); 26073b2aab18SMatthew Ahrens ASSERT3U(ddpa->used, >=, -delta); 26083b2aab18SMatthew Ahrens dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); 26093b2aab18SMatthew Ahrens dsl_dir_diduse_space(odd, DD_USED_HEAD, 26103b2aab18SMatthew Ahrens -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); 26113b2aab18SMatthew Ahrens 2612c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; 26133b2aab18SMatthew Ahrens 26143b2aab18SMatthew Ahrens /* log history record */ 26153b2aab18SMatthew Ahrens spa_history_log_internal_ds(hds, "promote", tx, ""); 26163b2aab18SMatthew Ahrens 26173b2aab18SMatthew Ahrens dsl_dir_rele(odd, FTAG); 26183b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 2619a9799022Sck } 2620a9799022Sck 26213b2aab18SMatthew Ahrens /* 26223b2aab18SMatthew Ahrens * Make a list of dsl_dataset_t's for the snapshots between first_obj 26233b2aab18SMatthew Ahrens * (exclusive) and last_obj (inclusive). The list will be in reverse 26243b2aab18SMatthew Ahrens * order (last_obj will be the list_head()). If first_obj == 0, do all 26253b2aab18SMatthew Ahrens * snapshots back to this dataset's origin. 26263b2aab18SMatthew Ahrens */ 2627a9799022Sck static int 26283b2aab18SMatthew Ahrens snaplist_make(dsl_pool_t *dp, 26293b2aab18SMatthew Ahrens uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) 2630a9799022Sck { 26313b2aab18SMatthew Ahrens uint64_t obj = last_obj; 2632a9799022Sck 26333b2aab18SMatthew Ahrens list_create(l, sizeof (struct promotenode), 26343b2aab18SMatthew Ahrens offsetof(struct promotenode, link)); 2635a9799022Sck 26363b2aab18SMatthew Ahrens while (obj != first_obj) { 26373b2aab18SMatthew Ahrens dsl_dataset_t *ds; 26383b2aab18SMatthew Ahrens struct promotenode *snap; 26393b2aab18SMatthew Ahrens int err; 264092241e0bSTom Erickson 26413b2aab18SMatthew Ahrens err = dsl_dataset_hold_obj(dp, obj, tag, &ds); 26423b2aab18SMatthew Ahrens ASSERT(err != ENOENT); 26433b2aab18SMatthew Ahrens if (err != 0) 26443b2aab18SMatthew Ahrens return (err); 2645a9799022Sck 26463b2aab18SMatthew Ahrens if (first_obj == 0) 2647c1379625SJustin T. Gibbs first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; 26483b2aab18SMatthew Ahrens 26493b2aab18SMatthew Ahrens snap = kmem_alloc(sizeof (*snap), KM_SLEEP); 26503b2aab18SMatthew Ahrens snap->ds = ds; 26513b2aab18SMatthew Ahrens list_insert_tail(l, snap); 2652c1379625SJustin T. Gibbs obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 26533b2aab18SMatthew Ahrens } 2654a9799022Sck 2655a9799022Sck return (0); 2656a9799022Sck } 2657a9799022Sck 26583b2aab18SMatthew Ahrens static int 26593b2aab18SMatthew Ahrens snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) 2660a9799022Sck { 26613b2aab18SMatthew Ahrens struct promotenode *snap; 2662a9799022Sck 26633b2aab18SMatthew Ahrens *spacep = 0; 26643b2aab18SMatthew Ahrens for (snap = list_head(l); snap; snap = list_next(l, snap)) { 26653b2aab18SMatthew Ahrens uint64_t used, comp, uncomp; 26663b2aab18SMatthew Ahrens dsl_deadlist_space_range(&snap->ds->ds_deadlist, 26673b2aab18SMatthew Ahrens mintxg, UINT64_MAX, &used, &comp, &uncomp); 26683b2aab18SMatthew Ahrens *spacep += used; 266992241e0bSTom Erickson } 26703b2aab18SMatthew Ahrens return (0); 2671a9799022Sck } 2672a9799022Sck 26733b2aab18SMatthew Ahrens static void 26743b2aab18SMatthew Ahrens snaplist_destroy(list_t *l, void *tag) 2675a9799022Sck { 26763b2aab18SMatthew Ahrens struct promotenode *snap; 267792241e0bSTom Erickson 26783b2aab18SMatthew Ahrens if (l == NULL || !list_link_active(&l->list_head)) 26793b2aab18SMatthew Ahrens return; 2680a9799022Sck 26813b2aab18SMatthew Ahrens while ((snap = list_tail(l)) != NULL) { 26823b2aab18SMatthew Ahrens list_remove(l, snap); 26833b2aab18SMatthew Ahrens dsl_dataset_rele(snap->ds, tag); 26843b2aab18SMatthew Ahrens kmem_free(snap, sizeof (*snap)); 26853b2aab18SMatthew Ahrens } 26863b2aab18SMatthew Ahrens list_destroy(l); 2687a9799022Sck } 2688a9799022Sck 2689a9799022Sck static int 26903b2aab18SMatthew Ahrens promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) 2691a9799022Sck { 26923b2aab18SMatthew Ahrens int error; 26933b2aab18SMatthew Ahrens dsl_dir_t *dd; 26943b2aab18SMatthew Ahrens struct promotenode *snap; 2695a9799022Sck 26963b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, 26973b2aab18SMatthew Ahrens &ddpa->ddpa_clone); 26983b2aab18SMatthew Ahrens if (error != 0) 26993b2aab18SMatthew Ahrens return (error); 27003b2aab18SMatthew Ahrens dd = ddpa->ddpa_clone->ds_dir; 2701a9799022Sck 2702bc9014e6SJustin Gibbs if (ddpa->ddpa_clone->ds_is_snapshot || 27033b2aab18SMatthew Ahrens !dsl_dir_is_clone(dd)) { 27043b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->ddpa_clone, tag); 2705be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 27063b2aab18SMatthew Ahrens } 2707a9799022Sck 2708c1379625SJustin T. Gibbs error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, 27093b2aab18SMatthew Ahrens &ddpa->shared_snaps, tag); 27103b2aab18SMatthew Ahrens if (error != 0) 27113b2aab18SMatthew Ahrens goto out; 2712a9799022Sck 27133b2aab18SMatthew Ahrens error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, 27143b2aab18SMatthew Ahrens &ddpa->clone_snaps, tag); 27153b2aab18SMatthew Ahrens if (error != 0) 27163b2aab18SMatthew Ahrens goto out; 2717a9799022Sck 27183b2aab18SMatthew Ahrens snap = list_head(&ddpa->shared_snaps); 2719c1379625SJustin T. Gibbs ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); 2720c1379625SJustin T. Gibbs error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, 2721c1379625SJustin T. Gibbs dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, 27223b2aab18SMatthew Ahrens &ddpa->origin_snaps, tag); 27233b2aab18SMatthew Ahrens if (error != 0) 27243b2aab18SMatthew Ahrens goto out; 2725379c004dSEric Schrock 2726c1379625SJustin T. Gibbs if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { 27273b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, 2728c1379625SJustin T. Gibbs dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, 27293b2aab18SMatthew Ahrens tag, &ddpa->origin_origin); 27303b2aab18SMatthew Ahrens if (error != 0) 27313b2aab18SMatthew Ahrens goto out; 2732379c004dSEric Schrock } 27333b2aab18SMatthew Ahrens out: 27343b2aab18SMatthew Ahrens if (error != 0) 27353b2aab18SMatthew Ahrens promote_rele(ddpa, tag); 27363b2aab18SMatthew Ahrens return (error); 2737a9799022Sck } 2738a9799022Sck 2739a9799022Sck static void 27403b2aab18SMatthew Ahrens promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) 2741a9799022Sck { 27423b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->shared_snaps, tag); 27433b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->clone_snaps, tag); 27443b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->origin_snaps, tag); 27453b2aab18SMatthew Ahrens if (ddpa->origin_origin != NULL) 27463b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->origin_origin, tag); 27473b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->ddpa_clone, tag); 27483b2aab18SMatthew Ahrens } 274902c8f3f0SMatthew Ahrens 27503b2aab18SMatthew Ahrens /* 27513b2aab18SMatthew Ahrens * Promote a clone. 27523b2aab18SMatthew Ahrens * 27533b2aab18SMatthew Ahrens * If it fails due to a conflicting snapshot name, "conflsnap" will be filled 27543b2aab18SMatthew Ahrens * in with the name. (It must be at least MAXNAMELEN bytes long.) 27553b2aab18SMatthew Ahrens */ 27563b2aab18SMatthew Ahrens int 27573b2aab18SMatthew Ahrens dsl_dataset_promote(const char *name, char *conflsnap) 27583b2aab18SMatthew Ahrens { 27593b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t ddpa = { 0 }; 27603b2aab18SMatthew Ahrens uint64_t numsnaps; 27613b2aab18SMatthew Ahrens int error; 27623b2aab18SMatthew Ahrens objset_t *os; 276392241e0bSTom Erickson 27643b2aab18SMatthew Ahrens /* 27653b2aab18SMatthew Ahrens * We will modify space proportional to the number of 27663b2aab18SMatthew Ahrens * snapshots. Compute numsnaps. 27673b2aab18SMatthew Ahrens */ 27683b2aab18SMatthew Ahrens error = dmu_objset_hold(name, FTAG, &os); 27693b2aab18SMatthew Ahrens if (error != 0) 27703b2aab18SMatthew Ahrens return (error); 27713b2aab18SMatthew Ahrens error = zap_count(dmu_objset_pool(os)->dp_meta_objset, 2772c1379625SJustin T. Gibbs dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, 2773c1379625SJustin T. Gibbs &numsnaps); 27743b2aab18SMatthew Ahrens dmu_objset_rele(os, FTAG); 27753b2aab18SMatthew Ahrens if (error != 0) 27763b2aab18SMatthew Ahrens return (error); 277702c8f3f0SMatthew Ahrens 27783b2aab18SMatthew Ahrens ddpa.ddpa_clonename = name; 27793b2aab18SMatthew Ahrens ddpa.err_ds = conflsnap; 2780a2afb611SJerry Jelinek ddpa.cr = CRED(); 278102c8f3f0SMatthew Ahrens 27823b2aab18SMatthew Ahrens return (dsl_sync_task(name, dsl_dataset_promote_check, 27837d46dc6cSMatthew Ahrens dsl_dataset_promote_sync, &ddpa, 27847d46dc6cSMatthew Ahrens 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED)); 2785a9799022Sck } 2786a9799022Sck 2787a9799022Sck int 27883b2aab18SMatthew Ahrens dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, 278991948b51SKeith M Wesolowski dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) 2790a9799022Sck { 27913b2aab18SMatthew Ahrens int64_t unused_refres_delta; 2792a9799022Sck 27933b2aab18SMatthew Ahrens /* they should both be heads */ 2794bc9014e6SJustin Gibbs if (clone->ds_is_snapshot || 2795bc9014e6SJustin Gibbs origin_head->ds_is_snapshot) 2796be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 279792241e0bSTom Erickson 279834f2f8cfSMatthew Ahrens /* if we are not forcing, the branch point should be just before them */ 279934f2f8cfSMatthew Ahrens if (!force && clone->ds_prev != origin_head->ds_prev) 2800be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2801a9799022Sck 28023b2aab18SMatthew Ahrens /* clone should be the clone (unless they are unrelated) */ 28033b2aab18SMatthew Ahrens if (clone->ds_prev != NULL && 28043b2aab18SMatthew Ahrens clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && 280534f2f8cfSMatthew Ahrens origin_head->ds_dir != clone->ds_prev->ds_dir) 2806be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 280792241e0bSTom Erickson 28083b2aab18SMatthew Ahrens /* the clone should be a child of the origin */ 28093b2aab18SMatthew Ahrens if (clone->ds_dir->dd_parent != origin_head->ds_dir) 2810be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2811842727c2SChris Kirby 28123b2aab18SMatthew Ahrens /* origin_head shouldn't be modified unless 'force' */ 281334f2f8cfSMatthew Ahrens if (!force && 281434f2f8cfSMatthew Ahrens dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) 2815be6fd75aSMatthew Ahrens return (SET_ERROR(ETXTBSY)); 2816c99e4bdcSChris Kirby 28173b2aab18SMatthew Ahrens /* origin_head should have no long holds (e.g. is not mounted) */ 281891948b51SKeith M Wesolowski if (dsl_dataset_handoff_check(origin_head, owner, tx)) 2819be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 28203b2aab18SMatthew Ahrens 28213b2aab18SMatthew Ahrens /* check amount of any unconsumed refreservation */ 28223b2aab18SMatthew Ahrens unused_refres_delta = 28233b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2824c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_unique_bytes) - 28253b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2826c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 28273b2aab18SMatthew Ahrens 28283b2aab18SMatthew Ahrens if (unused_refres_delta > 0 && 28293b2aab18SMatthew Ahrens unused_refres_delta > 28303b2aab18SMatthew Ahrens dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) 2831be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 28323b2aab18SMatthew Ahrens 28333b2aab18SMatthew Ahrens /* clone can't be over the head's refquota */ 28343b2aab18SMatthew Ahrens if (origin_head->ds_quota != 0 && 2835c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_referenced_bytes > 2836c1379625SJustin T. Gibbs origin_head->ds_quota) 2837be6fd75aSMatthew Ahrens return (SET_ERROR(EDQUOT)); 2838c99e4bdcSChris Kirby 28393b2aab18SMatthew Ahrens return (0); 2840c99e4bdcSChris Kirby } 2841c99e4bdcSChris Kirby 2842a7f53a56SChris Kirby void 28433b2aab18SMatthew Ahrens dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, 28443b2aab18SMatthew Ahrens dsl_dataset_t *origin_head, dmu_tx_t *tx) 2845a7f53a56SChris Kirby { 28463b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 28473b2aab18SMatthew Ahrens int64_t unused_refres_delta; 2848a7f53a56SChris Kirby 28493b2aab18SMatthew Ahrens ASSERT(clone->ds_reserved == 0); 28503b2aab18SMatthew Ahrens ASSERT(origin_head->ds_quota == 0 || 2851c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota); 285234f2f8cfSMatthew Ahrens ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); 2853842727c2SChris Kirby 2854ca0cc391SMatthew Ahrens /* 2855ca0cc391SMatthew Ahrens * Swap per-dataset feature flags. 2856ca0cc391SMatthew Ahrens */ 2857ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 2858ca0cc391SMatthew Ahrens if (!(spa_feature_table[f].fi_flags & 2859ca0cc391SMatthew Ahrens ZFEATURE_FLAG_PER_DATASET)) { 2860ca0cc391SMatthew Ahrens ASSERT(!clone->ds_feature_inuse[f]); 2861ca0cc391SMatthew Ahrens ASSERT(!origin_head->ds_feature_inuse[f]); 2862ca0cc391SMatthew Ahrens continue; 2863ca0cc391SMatthew Ahrens } 2864ca0cc391SMatthew Ahrens 2865ca0cc391SMatthew Ahrens boolean_t clone_inuse = clone->ds_feature_inuse[f]; 2866ca0cc391SMatthew Ahrens boolean_t origin_head_inuse = origin_head->ds_feature_inuse[f]; 2867ca0cc391SMatthew Ahrens 2868ca0cc391SMatthew Ahrens if (clone_inuse) { 2869ca0cc391SMatthew Ahrens dsl_dataset_deactivate_feature(clone->ds_object, f, tx); 2870ca0cc391SMatthew Ahrens clone->ds_feature_inuse[f] = B_FALSE; 2871ca0cc391SMatthew Ahrens } 2872ca0cc391SMatthew Ahrens if (origin_head_inuse) { 2873ca0cc391SMatthew Ahrens dsl_dataset_deactivate_feature(origin_head->ds_object, 2874ca0cc391SMatthew Ahrens f, tx); 2875ca0cc391SMatthew Ahrens origin_head->ds_feature_inuse[f] = B_FALSE; 2876ca0cc391SMatthew Ahrens } 2877ca0cc391SMatthew Ahrens if (clone_inuse) { 2878ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(origin_head->ds_object, 2879ca0cc391SMatthew Ahrens f, tx); 2880ca0cc391SMatthew Ahrens origin_head->ds_feature_inuse[f] = B_TRUE; 2881ca0cc391SMatthew Ahrens } 2882ca0cc391SMatthew Ahrens if (origin_head_inuse) { 2883ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(clone->ds_object, f, tx); 2884ca0cc391SMatthew Ahrens clone->ds_feature_inuse[f] = B_TRUE; 2885ca0cc391SMatthew Ahrens } 2886ca0cc391SMatthew Ahrens } 2887ca0cc391SMatthew Ahrens 28883b2aab18SMatthew Ahrens dmu_buf_will_dirty(clone->ds_dbuf, tx); 28893b2aab18SMatthew Ahrens dmu_buf_will_dirty(origin_head->ds_dbuf, tx); 2890842727c2SChris Kirby 28913b2aab18SMatthew Ahrens if (clone->ds_objset != NULL) { 28923b2aab18SMatthew Ahrens dmu_objset_evict(clone->ds_objset); 28933b2aab18SMatthew Ahrens clone->ds_objset = NULL; 28943b2aab18SMatthew Ahrens } 2895842727c2SChris Kirby 28963b2aab18SMatthew Ahrens if (origin_head->ds_objset != NULL) { 28973b2aab18SMatthew Ahrens dmu_objset_evict(origin_head->ds_objset); 28983b2aab18SMatthew Ahrens origin_head->ds_objset = NULL; 2899842727c2SChris Kirby } 2900842727c2SChris Kirby 29013b2aab18SMatthew Ahrens unused_refres_delta = 29023b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2903c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_unique_bytes) - 29043b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 2905c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 29063b2aab18SMatthew Ahrens 29073b2aab18SMatthew Ahrens /* 29083b2aab18SMatthew Ahrens * Reset origin's unique bytes, if it exists. 29093b2aab18SMatthew Ahrens */ 29103b2aab18SMatthew Ahrens if (clone->ds_prev) { 29113b2aab18SMatthew Ahrens dsl_dataset_t *origin = clone->ds_prev; 29123b2aab18SMatthew Ahrens uint64_t comp, uncomp; 29133b2aab18SMatthew Ahrens 29143b2aab18SMatthew Ahrens dmu_buf_will_dirty(origin->ds_dbuf, tx); 29153b2aab18SMatthew Ahrens dsl_deadlist_space_range(&clone->ds_deadlist, 2916c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, 2917c1379625SJustin T. Gibbs &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); 29183b2aab18SMatthew Ahrens } 29193b2aab18SMatthew Ahrens 29203b2aab18SMatthew Ahrens /* swap blkptrs */ 29213b2aab18SMatthew Ahrens { 29223b2aab18SMatthew Ahrens blkptr_t tmp; 2923c1379625SJustin T. Gibbs tmp = dsl_dataset_phys(origin_head)->ds_bp; 2924c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_bp = 2925c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_bp; 2926c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_bp = tmp; 29273b2aab18SMatthew Ahrens } 29283b2aab18SMatthew Ahrens 29293b2aab18SMatthew Ahrens /* set dd_*_bytes */ 29303b2aab18SMatthew Ahrens { 29313b2aab18SMatthew Ahrens int64_t dused, dcomp, duncomp; 29323b2aab18SMatthew Ahrens uint64_t cdl_used, cdl_comp, cdl_uncomp; 29333b2aab18SMatthew Ahrens uint64_t odl_used, odl_comp, odl_uncomp; 29343b2aab18SMatthew Ahrens 2935c1379625SJustin T. Gibbs ASSERT3U(dsl_dir_phys(clone->ds_dir)-> 29363b2aab18SMatthew Ahrens dd_used_breakdown[DD_USED_SNAP], ==, 0); 29373b2aab18SMatthew Ahrens 29383b2aab18SMatthew Ahrens dsl_deadlist_space(&clone->ds_deadlist, 29393b2aab18SMatthew Ahrens &cdl_used, &cdl_comp, &cdl_uncomp); 29403b2aab18SMatthew Ahrens dsl_deadlist_space(&origin_head->ds_deadlist, 29413b2aab18SMatthew Ahrens &odl_used, &odl_comp, &odl_uncomp); 294215508ac0SChris Kirby 2943c1379625SJustin T. Gibbs dused = dsl_dataset_phys(clone)->ds_referenced_bytes + 2944c1379625SJustin T. Gibbs cdl_used - 2945c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_referenced_bytes + 2946c1379625SJustin T. Gibbs odl_used); 2947c1379625SJustin T. Gibbs dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + 2948c1379625SJustin T. Gibbs cdl_comp - 2949c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_compressed_bytes + 2950c1379625SJustin T. Gibbs odl_comp); 2951c1379625SJustin T. Gibbs duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + 29523b2aab18SMatthew Ahrens cdl_uncomp - 2953c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + 2954c1379625SJustin T. Gibbs odl_uncomp); 2955842727c2SChris Kirby 29563b2aab18SMatthew Ahrens dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, 29573b2aab18SMatthew Ahrens dused, dcomp, duncomp, tx); 29583b2aab18SMatthew Ahrens dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, 29593b2aab18SMatthew Ahrens -dused, -dcomp, -duncomp, tx); 2960842727c2SChris Kirby 2961842727c2SChris Kirby /* 29623b2aab18SMatthew Ahrens * The difference in the space used by snapshots is the 29633b2aab18SMatthew Ahrens * difference in snapshot space due to the head's 29643b2aab18SMatthew Ahrens * deadlist (since that's the only thing that's 29653b2aab18SMatthew Ahrens * changing that affects the snapused). 2966842727c2SChris Kirby */ 29673b2aab18SMatthew Ahrens dsl_deadlist_space_range(&clone->ds_deadlist, 29683b2aab18SMatthew Ahrens origin_head->ds_dir->dd_origin_txg, UINT64_MAX, 29693b2aab18SMatthew Ahrens &cdl_used, &cdl_comp, &cdl_uncomp); 29703b2aab18SMatthew Ahrens dsl_deadlist_space_range(&origin_head->ds_deadlist, 29713b2aab18SMatthew Ahrens origin_head->ds_dir->dd_origin_txg, UINT64_MAX, 29723b2aab18SMatthew Ahrens &odl_used, &odl_comp, &odl_uncomp); 29733b2aab18SMatthew Ahrens dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, 29743b2aab18SMatthew Ahrens DD_USED_HEAD, DD_USED_SNAP, tx); 2975842727c2SChris Kirby } 2976842727c2SChris Kirby 29773b2aab18SMatthew Ahrens /* swap ds_*_bytes */ 2978c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, 2979c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_referenced_bytes); 2980c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, 2981c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_compressed_bytes); 2982c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, 2983c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_uncompressed_bytes); 2984c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, 2985c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 2986842727c2SChris Kirby 29873b2aab18SMatthew Ahrens /* apply any parent delta for change in unconsumed refreservation */ 29883b2aab18SMatthew Ahrens dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, 29893b2aab18SMatthew Ahrens unused_refres_delta, 0, 0, tx); 2990ca45db41SChris Kirby 29913b2aab18SMatthew Ahrens /* 29923b2aab18SMatthew Ahrens * Swap deadlists. 29933b2aab18SMatthew Ahrens */ 29943b2aab18SMatthew Ahrens dsl_deadlist_close(&clone->ds_deadlist); 29953b2aab18SMatthew Ahrens dsl_deadlist_close(&origin_head->ds_deadlist); 2996c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, 2997c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_deadlist_obj); 29983b2aab18SMatthew Ahrens dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, 2999c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_deadlist_obj); 30003b2aab18SMatthew Ahrens dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, 3001c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_deadlist_obj); 3002842727c2SChris Kirby 30033b2aab18SMatthew Ahrens dsl_scan_ds_clone_swapped(origin_head, clone, tx); 3004842727c2SChris Kirby 30053b2aab18SMatthew Ahrens spa_history_log_internal_ds(clone, "clone swap", tx, 30063b2aab18SMatthew Ahrens "parent=%s", origin_head->ds_dir->dd_myname); 3007842727c2SChris Kirby } 3008842727c2SChris Kirby 30093b2aab18SMatthew Ahrens /* 30103b2aab18SMatthew Ahrens * Given a pool name and a dataset object number in that pool, 30113b2aab18SMatthew Ahrens * return the name of that dataset. 30123b2aab18SMatthew Ahrens */ 3013a7f53a56SChris Kirby int 30143b2aab18SMatthew Ahrens dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) 3015a7f53a56SChris Kirby { 30163b2aab18SMatthew Ahrens dsl_pool_t *dp; 30173b2aab18SMatthew Ahrens dsl_dataset_t *ds; 3018a7f53a56SChris Kirby int error; 3019a7f53a56SChris Kirby 30203b2aab18SMatthew Ahrens error = dsl_pool_hold(pname, FTAG, &dp); 30213b2aab18SMatthew Ahrens if (error != 0) 30223b2aab18SMatthew Ahrens return (error); 30233b2aab18SMatthew Ahrens 30243b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); 30253b2aab18SMatthew Ahrens if (error == 0) { 30263b2aab18SMatthew Ahrens dsl_dataset_name(ds, buf); 30273b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 30283b2aab18SMatthew Ahrens } 30293b2aab18SMatthew Ahrens dsl_pool_rele(dp, FTAG); 3030a7f53a56SChris Kirby 3031a7f53a56SChris Kirby return (error); 3032a7f53a56SChris Kirby } 3033a7f53a56SChris Kirby 3034842727c2SChris Kirby int 30353b2aab18SMatthew Ahrens dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, 30363b2aab18SMatthew Ahrens uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) 3037842727c2SChris Kirby { 30383b2aab18SMatthew Ahrens int error = 0; 3039842727c2SChris Kirby 30403b2aab18SMatthew Ahrens ASSERT3S(asize, >, 0); 3041842727c2SChris Kirby 30423b2aab18SMatthew Ahrens /* 30433b2aab18SMatthew Ahrens * *ref_rsrv is the portion of asize that will come from any 30443b2aab18SMatthew Ahrens * unconsumed refreservation space. 30453b2aab18SMatthew Ahrens */ 30463b2aab18SMatthew Ahrens *ref_rsrv = 0; 3047842727c2SChris Kirby 30483b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 30493b2aab18SMatthew Ahrens /* 30503b2aab18SMatthew Ahrens * Make a space adjustment for reserved bytes. 30513b2aab18SMatthew Ahrens */ 3052c1379625SJustin T. Gibbs if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { 30533b2aab18SMatthew Ahrens ASSERT3U(*used, >=, 3054c1379625SJustin T. Gibbs ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); 3055c1379625SJustin T. Gibbs *used -= 3056c1379625SJustin T. Gibbs (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); 30573b2aab18SMatthew Ahrens *ref_rsrv = 30583b2aab18SMatthew Ahrens asize - MIN(asize, parent_delta(ds, asize + inflight)); 3059842727c2SChris Kirby } 3060842727c2SChris Kirby 30613b2aab18SMatthew Ahrens if (!check_quota || ds->ds_quota == 0) { 30623b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 30633b2aab18SMatthew Ahrens return (0); 3064842727c2SChris Kirby } 30653b2aab18SMatthew Ahrens /* 30663b2aab18SMatthew Ahrens * If they are requesting more space, and our current estimate 30673b2aab18SMatthew Ahrens * is over quota, they get to try again unless the actual 30683b2aab18SMatthew Ahrens * on-disk is over quota and there are no pending changes (which 30693b2aab18SMatthew Ahrens * may free up space for us). 30703b2aab18SMatthew Ahrens */ 3071c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= 3072c1379625SJustin T. Gibbs ds->ds_quota) { 30733b2aab18SMatthew Ahrens if (inflight > 0 || 3074c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) 3075be6fd75aSMatthew Ahrens error = SET_ERROR(ERESTART); 30763b2aab18SMatthew Ahrens else 3077be6fd75aSMatthew Ahrens error = SET_ERROR(EDQUOT); 3078842727c2SChris Kirby } 30793b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 3080842727c2SChris Kirby 3081842727c2SChris Kirby return (error); 3082842727c2SChris Kirby } 3083842727c2SChris Kirby 30843b2aab18SMatthew Ahrens typedef struct dsl_dataset_set_qr_arg { 30853b2aab18SMatthew Ahrens const char *ddsqra_name; 30863b2aab18SMatthew Ahrens zprop_source_t ddsqra_source; 30873b2aab18SMatthew Ahrens uint64_t ddsqra_value; 30883b2aab18SMatthew Ahrens } dsl_dataset_set_qr_arg_t; 3089842727c2SChris Kirby 30903b2aab18SMatthew Ahrens 30913b2aab18SMatthew Ahrens /* ARGSUSED */ 3092842727c2SChris Kirby static int 30933b2aab18SMatthew Ahrens dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) 3094842727c2SChris Kirby { 30953b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 30963b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 30973b2aab18SMatthew Ahrens dsl_dataset_t *ds; 3098842727c2SChris Kirby int error; 30993b2aab18SMatthew Ahrens uint64_t newval; 3100842727c2SChris Kirby 31013b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) 3102be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 3103842727c2SChris Kirby 31043b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); 31053b2aab18SMatthew Ahrens if (error != 0) 31063b2aab18SMatthew Ahrens return (error); 31073b2aab18SMatthew Ahrens 3108bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 31093b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3110be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 3111842727c2SChris Kirby } 3112842727c2SChris Kirby 31133b2aab18SMatthew Ahrens error = dsl_prop_predict(ds->ds_dir, 31143b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 31153b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); 31163b2aab18SMatthew Ahrens if (error != 0) { 31173b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3118842727c2SChris Kirby return (error); 3119842727c2SChris Kirby } 3120842727c2SChris Kirby 31213b2aab18SMatthew Ahrens if (newval == 0) { 31223b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 31233b2aab18SMatthew Ahrens return (0); 31243b2aab18SMatthew Ahrens } 3125842727c2SChris Kirby 3126c1379625SJustin T. Gibbs if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || 31273b2aab18SMatthew Ahrens newval < ds->ds_reserved) { 31283b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3129be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 31303b2aab18SMatthew Ahrens } 31313b2aab18SMatthew Ahrens 31323b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3133842727c2SChris Kirby return (0); 3134842727c2SChris Kirby } 3135842727c2SChris Kirby 31363b2aab18SMatthew Ahrens static void 31373b2aab18SMatthew Ahrens dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) 3138842727c2SChris Kirby { 31393b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 31403b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 31413b2aab18SMatthew Ahrens dsl_dataset_t *ds; 31423b2aab18SMatthew Ahrens uint64_t newval; 3143842727c2SChris Kirby 31443b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); 3145842727c2SChris Kirby 31463b2aab18SMatthew Ahrens dsl_prop_set_sync_impl(ds, 31473b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 31483b2aab18SMatthew Ahrens ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, 31493b2aab18SMatthew Ahrens &ddsqra->ddsqra_value, tx); 3150842727c2SChris Kirby 31513b2aab18SMatthew Ahrens VERIFY0(dsl_prop_get_int_ds(ds, 31523b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); 3153842727c2SChris Kirby 31543b2aab18SMatthew Ahrens if (ds->ds_quota != newval) { 31553b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 31563b2aab18SMatthew Ahrens ds->ds_quota = newval; 3157842727c2SChris Kirby } 31583b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3159842727c2SChris Kirby } 3160842727c2SChris Kirby 31613b2aab18SMatthew Ahrens int 31623b2aab18SMatthew Ahrens dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, 31633b2aab18SMatthew Ahrens uint64_t refquota) 3164842727c2SChris Kirby { 31653b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t ddsqra; 3166842727c2SChris Kirby 31673b2aab18SMatthew Ahrens ddsqra.ddsqra_name = dsname; 31683b2aab18SMatthew Ahrens ddsqra.ddsqra_source = source; 31693b2aab18SMatthew Ahrens ddsqra.ddsqra_value = refquota; 31703b2aab18SMatthew Ahrens 31713b2aab18SMatthew Ahrens return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, 31727d46dc6cSMatthew Ahrens dsl_dataset_set_refquota_sync, &ddsqra, 0, ZFS_SPACE_CHECK_NONE)); 3173842727c2SChris Kirby } 3174842727c2SChris Kirby 3175842727c2SChris Kirby static int 31763b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) 3177842727c2SChris Kirby { 31783b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 31793b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 3180842727c2SChris Kirby dsl_dataset_t *ds; 3181842727c2SChris Kirby int error; 31823b2aab18SMatthew Ahrens uint64_t newval, unique; 3183d7747cbcSChris Kirby 31843b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) 3185be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 3186842727c2SChris Kirby 31873b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); 31883b2aab18SMatthew Ahrens if (error != 0) 3189842727c2SChris Kirby return (error); 3190842727c2SChris Kirby 3191bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 31923b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3193be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 3194842727c2SChris Kirby } 3195842727c2SChris Kirby 31963b2aab18SMatthew Ahrens error = dsl_prop_predict(ds->ds_dir, 31973b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 31983b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); 31993b2aab18SMatthew Ahrens if (error != 0) { 32003b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3201842727c2SChris Kirby return (error); 3202842727c2SChris Kirby } 3203842727c2SChris Kirby 32043b2aab18SMatthew Ahrens /* 32053b2aab18SMatthew Ahrens * If we are doing the preliminary check in open context, the 32063b2aab18SMatthew Ahrens * space estimates may be inaccurate. 32073b2aab18SMatthew Ahrens */ 32083b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) { 32093b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 32103b2aab18SMatthew Ahrens return (0); 3211842727c2SChris Kirby } 3212842727c2SChris Kirby 32133b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 32143b2aab18SMatthew Ahrens if (!DS_UNIQUE_IS_ACCURATE(ds)) 32153b2aab18SMatthew Ahrens dsl_dataset_recalc_head_uniq(ds); 3216c1379625SJustin T. Gibbs unique = dsl_dataset_phys(ds)->ds_unique_bytes; 32173b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 3218842727c2SChris Kirby 32193b2aab18SMatthew Ahrens if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { 32203b2aab18SMatthew Ahrens uint64_t delta = MAX(unique, newval) - 32213b2aab18SMatthew Ahrens MAX(unique, ds->ds_reserved); 3222842727c2SChris Kirby 32233b2aab18SMatthew Ahrens if (delta > 32243b2aab18SMatthew Ahrens dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || 32253b2aab18SMatthew Ahrens (ds->ds_quota > 0 && newval > ds->ds_quota)) { 32263b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3227be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 32283b2aab18SMatthew Ahrens } 3229842727c2SChris Kirby } 3230842727c2SChris Kirby 32313b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 32323b2aab18SMatthew Ahrens return (0); 3233842727c2SChris Kirby } 3234842727c2SChris Kirby 32353b2aab18SMatthew Ahrens void 32363b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, 32373b2aab18SMatthew Ahrens zprop_source_t source, uint64_t value, dmu_tx_t *tx) 3238ca45db41SChris Kirby { 32393b2aab18SMatthew Ahrens uint64_t newval; 32403b2aab18SMatthew Ahrens uint64_t unique; 32413b2aab18SMatthew Ahrens int64_t delta; 3242ca45db41SChris Kirby 32433b2aab18SMatthew Ahrens dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 32443b2aab18SMatthew Ahrens source, sizeof (value), 1, &value, tx); 3245ca45db41SChris Kirby 32463b2aab18SMatthew Ahrens VERIFY0(dsl_prop_get_int_ds(ds, 32473b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); 3248a7f53a56SChris Kirby 32493b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 32503b2aab18SMatthew Ahrens mutex_enter(&ds->ds_dir->dd_lock); 32513b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 32523b2aab18SMatthew Ahrens ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); 3253c1379625SJustin T. Gibbs unique = dsl_dataset_phys(ds)->ds_unique_bytes; 32543b2aab18SMatthew Ahrens delta = MAX(0, (int64_t)(newval - unique)) - 32553b2aab18SMatthew Ahrens MAX(0, (int64_t)(ds->ds_reserved - unique)); 32563b2aab18SMatthew Ahrens ds->ds_reserved = newval; 32573b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 3258a7f53a56SChris Kirby 32593b2aab18SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); 32603b2aab18SMatthew Ahrens mutex_exit(&ds->ds_dir->dd_lock); 3261ca45db41SChris Kirby } 3262ca45db41SChris Kirby 32633b2aab18SMatthew Ahrens static void 32643b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) 3265842727c2SChris Kirby { 32663b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 32673b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 3268842727c2SChris Kirby dsl_dataset_t *ds; 3269842727c2SChris Kirby 32703b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); 32713b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync_impl(ds, 32723b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); 3273842727c2SChris Kirby dsl_dataset_rele(ds, FTAG); 3274842727c2SChris Kirby } 3275503ad85cSMatthew Ahrens 3276503ad85cSMatthew Ahrens int 32773b2aab18SMatthew Ahrens dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, 32783b2aab18SMatthew Ahrens uint64_t refreservation) 3279503ad85cSMatthew Ahrens { 32803b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t ddsqra; 3281503ad85cSMatthew Ahrens 32823b2aab18SMatthew Ahrens ddsqra.ddsqra_name = dsname; 32833b2aab18SMatthew Ahrens ddsqra.ddsqra_source = source; 32843b2aab18SMatthew Ahrens ddsqra.ddsqra_value = refreservation; 32853b2aab18SMatthew Ahrens 32863b2aab18SMatthew Ahrens return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, 32877d46dc6cSMatthew Ahrens dsl_dataset_set_refreservation_sync, &ddsqra, 32887d46dc6cSMatthew Ahrens 0, ZFS_SPACE_CHECK_NONE)); 3289503ad85cSMatthew Ahrens } 329019b94df9SMatthew Ahrens 329119b94df9SMatthew Ahrens /* 329219b94df9SMatthew Ahrens * Return (in *usedp) the amount of space written in new that is not 329319b94df9SMatthew Ahrens * present in oldsnap. New may be a snapshot or the head. Old must be 329419b94df9SMatthew Ahrens * a snapshot before new, in new's filesystem (or its origin). If not then 329519b94df9SMatthew Ahrens * fail and return EINVAL. 329619b94df9SMatthew Ahrens * 329719b94df9SMatthew Ahrens * The written space is calculated by considering two components: First, we 329819b94df9SMatthew Ahrens * ignore any freed space, and calculate the written as new's used space 329919b94df9SMatthew Ahrens * minus old's used space. Next, we add in the amount of space that was freed 330019b94df9SMatthew Ahrens * between the two snapshots, thus reducing new's used space relative to old's. 330119b94df9SMatthew Ahrens * Specifically, this is the space that was born before old->ds_creation_txg, 330219b94df9SMatthew Ahrens * and freed before new (ie. on new's deadlist or a previous deadlist). 330319b94df9SMatthew Ahrens * 330419b94df9SMatthew Ahrens * space freed [---------------------] 330519b94df9SMatthew Ahrens * snapshots ---O-------O--------O-------O------ 330619b94df9SMatthew Ahrens * oldsnap new 330719b94df9SMatthew Ahrens */ 330819b94df9SMatthew Ahrens int 330919b94df9SMatthew Ahrens dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, 331019b94df9SMatthew Ahrens uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 331119b94df9SMatthew Ahrens { 331219b94df9SMatthew Ahrens int err = 0; 331319b94df9SMatthew Ahrens uint64_t snapobj; 331419b94df9SMatthew Ahrens dsl_pool_t *dp = new->ds_dir->dd_pool; 331519b94df9SMatthew Ahrens 33163b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 33173b2aab18SMatthew Ahrens 331819b94df9SMatthew Ahrens *usedp = 0; 3319c1379625SJustin T. Gibbs *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; 3320c1379625SJustin T. Gibbs *usedp -= dsl_dataset_phys(oldsnap)->ds_referenced_bytes; 332119b94df9SMatthew Ahrens 332219b94df9SMatthew Ahrens *compp = 0; 3323c1379625SJustin T. Gibbs *compp += dsl_dataset_phys(new)->ds_compressed_bytes; 3324c1379625SJustin T. Gibbs *compp -= dsl_dataset_phys(oldsnap)->ds_compressed_bytes; 332519b94df9SMatthew Ahrens 332619b94df9SMatthew Ahrens *uncompp = 0; 3327c1379625SJustin T. Gibbs *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; 3328c1379625SJustin T. Gibbs *uncompp -= dsl_dataset_phys(oldsnap)->ds_uncompressed_bytes; 332919b94df9SMatthew Ahrens 333019b94df9SMatthew Ahrens snapobj = new->ds_object; 333119b94df9SMatthew Ahrens while (snapobj != oldsnap->ds_object) { 333219b94df9SMatthew Ahrens dsl_dataset_t *snap; 333319b94df9SMatthew Ahrens uint64_t used, comp, uncomp; 333419b94df9SMatthew Ahrens 3335ad135b5dSChristopher Siden if (snapobj == new->ds_object) { 3336ad135b5dSChristopher Siden snap = new; 3337ad135b5dSChristopher Siden } else { 3338ad135b5dSChristopher Siden err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); 3339ad135b5dSChristopher Siden if (err != 0) 3340ad135b5dSChristopher Siden break; 3341ad135b5dSChristopher Siden } 334219b94df9SMatthew Ahrens 3343c1379625SJustin T. Gibbs if (dsl_dataset_phys(snap)->ds_prev_snap_txg == 3344c1379625SJustin T. Gibbs dsl_dataset_phys(oldsnap)->ds_creation_txg) { 334519b94df9SMatthew Ahrens /* 334619b94df9SMatthew Ahrens * The blocks in the deadlist can not be born after 334719b94df9SMatthew Ahrens * ds_prev_snap_txg, so get the whole deadlist space, 334819b94df9SMatthew Ahrens * which is more efficient (especially for old-format 334919b94df9SMatthew Ahrens * deadlists). Unfortunately the deadlist code 335019b94df9SMatthew Ahrens * doesn't have enough information to make this 335119b94df9SMatthew Ahrens * optimization itself. 335219b94df9SMatthew Ahrens */ 335319b94df9SMatthew Ahrens dsl_deadlist_space(&snap->ds_deadlist, 335419b94df9SMatthew Ahrens &used, &comp, &uncomp); 335519b94df9SMatthew Ahrens } else { 335619b94df9SMatthew Ahrens dsl_deadlist_space_range(&snap->ds_deadlist, 3357c1379625SJustin T. Gibbs 0, dsl_dataset_phys(oldsnap)->ds_creation_txg, 335819b94df9SMatthew Ahrens &used, &comp, &uncomp); 335919b94df9SMatthew Ahrens } 336019b94df9SMatthew Ahrens *usedp += used; 336119b94df9SMatthew Ahrens *compp += comp; 336219b94df9SMatthew Ahrens *uncompp += uncomp; 336319b94df9SMatthew Ahrens 336419b94df9SMatthew Ahrens /* 336519b94df9SMatthew Ahrens * If we get to the beginning of the chain of snapshots 336619b94df9SMatthew Ahrens * (ds_prev_snap_obj == 0) before oldsnap, then oldsnap 336719b94df9SMatthew Ahrens * was not a snapshot of/before new. 336819b94df9SMatthew Ahrens */ 3369c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 3370ad135b5dSChristopher Siden if (snap != new) 3371ad135b5dSChristopher Siden dsl_dataset_rele(snap, FTAG); 337219b94df9SMatthew Ahrens if (snapobj == 0) { 3373be6fd75aSMatthew Ahrens err = SET_ERROR(EINVAL); 337419b94df9SMatthew Ahrens break; 337519b94df9SMatthew Ahrens } 337619b94df9SMatthew Ahrens 337719b94df9SMatthew Ahrens } 337819b94df9SMatthew Ahrens return (err); 337919b94df9SMatthew Ahrens } 338019b94df9SMatthew Ahrens 338119b94df9SMatthew Ahrens /* 338219b94df9SMatthew Ahrens * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, 338319b94df9SMatthew Ahrens * lastsnap, and all snapshots in between are deleted. 338419b94df9SMatthew Ahrens * 338519b94df9SMatthew Ahrens * blocks that would be freed [---------------------------] 338619b94df9SMatthew Ahrens * snapshots ---O-------O--------O-------O--------O 338719b94df9SMatthew Ahrens * firstsnap lastsnap 338819b94df9SMatthew Ahrens * 338919b94df9SMatthew Ahrens * This is the set of blocks that were born after the snap before firstsnap, 339019b94df9SMatthew Ahrens * (birth > firstsnap->prev_snap_txg) and died before the snap after the 339119b94df9SMatthew Ahrens * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). 339219b94df9SMatthew Ahrens * We calculate this by iterating over the relevant deadlists (from the snap 339319b94df9SMatthew Ahrens * after lastsnap, backward to the snap after firstsnap), summing up the 339419b94df9SMatthew Ahrens * space on the deadlist that was born after the snap before firstsnap. 339519b94df9SMatthew Ahrens */ 339619b94df9SMatthew Ahrens int 339719b94df9SMatthew Ahrens dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, 339819b94df9SMatthew Ahrens dsl_dataset_t *lastsnap, 339919b94df9SMatthew Ahrens uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 340019b94df9SMatthew Ahrens { 340119b94df9SMatthew Ahrens int err = 0; 340219b94df9SMatthew Ahrens uint64_t snapobj; 340319b94df9SMatthew Ahrens dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; 340419b94df9SMatthew Ahrens 3405bc9014e6SJustin Gibbs ASSERT(firstsnap->ds_is_snapshot); 3406bc9014e6SJustin Gibbs ASSERT(lastsnap->ds_is_snapshot); 340719b94df9SMatthew Ahrens 340819b94df9SMatthew Ahrens /* 340919b94df9SMatthew Ahrens * Check that the snapshots are in the same dsl_dir, and firstsnap 341019b94df9SMatthew Ahrens * is before lastsnap. 341119b94df9SMatthew Ahrens */ 341219b94df9SMatthew Ahrens if (firstsnap->ds_dir != lastsnap->ds_dir || 3413c1379625SJustin T. Gibbs dsl_dataset_phys(firstsnap)->ds_creation_txg > 3414c1379625SJustin T. Gibbs dsl_dataset_phys(lastsnap)->ds_creation_txg) 3415be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 341619b94df9SMatthew Ahrens 341719b94df9SMatthew Ahrens *usedp = *compp = *uncompp = 0; 341819b94df9SMatthew Ahrens 3419c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; 342019b94df9SMatthew Ahrens while (snapobj != firstsnap->ds_object) { 342119b94df9SMatthew Ahrens dsl_dataset_t *ds; 342219b94df9SMatthew Ahrens uint64_t used, comp, uncomp; 342319b94df9SMatthew Ahrens 342419b94df9SMatthew Ahrens err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); 342519b94df9SMatthew Ahrens if (err != 0) 342619b94df9SMatthew Ahrens break; 342719b94df9SMatthew Ahrens 342819b94df9SMatthew Ahrens dsl_deadlist_space_range(&ds->ds_deadlist, 3429c1379625SJustin T. Gibbs dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, 343019b94df9SMatthew Ahrens &used, &comp, &uncomp); 343119b94df9SMatthew Ahrens *usedp += used; 343219b94df9SMatthew Ahrens *compp += comp; 343319b94df9SMatthew Ahrens *uncompp += uncomp; 343419b94df9SMatthew Ahrens 3435c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 343619b94df9SMatthew Ahrens ASSERT3U(snapobj, !=, 0); 343719b94df9SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 343819b94df9SMatthew Ahrens } 343919b94df9SMatthew Ahrens return (err); 344019b94df9SMatthew Ahrens } 34413b2aab18SMatthew Ahrens 34423b2aab18SMatthew Ahrens /* 34433b2aab18SMatthew Ahrens * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. 34443b2aab18SMatthew Ahrens * For example, they could both be snapshots of the same filesystem, and 34453b2aab18SMatthew Ahrens * 'earlier' is before 'later'. Or 'earlier' could be the origin of 34463b2aab18SMatthew Ahrens * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's 34473b2aab18SMatthew Ahrens * filesystem. Or 'earlier' could be the origin's origin. 344878f17100SMatthew Ahrens * 344978f17100SMatthew Ahrens * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. 34503b2aab18SMatthew Ahrens */ 34513b2aab18SMatthew Ahrens boolean_t 345278f17100SMatthew Ahrens dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, 34539a686fbcSPaul Dagnelie uint64_t earlier_txg) 34543b2aab18SMatthew Ahrens { 34553b2aab18SMatthew Ahrens dsl_pool_t *dp = later->ds_dir->dd_pool; 34563b2aab18SMatthew Ahrens int error; 34573b2aab18SMatthew Ahrens boolean_t ret; 34583b2aab18SMatthew Ahrens 34593b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 3460bc9014e6SJustin Gibbs ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); 346178f17100SMatthew Ahrens 346278f17100SMatthew Ahrens if (earlier_txg == 0) 3463c1379625SJustin T. Gibbs earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; 34643b2aab18SMatthew Ahrens 3465bc9014e6SJustin Gibbs if (later->ds_is_snapshot && 3466c1379625SJustin T. Gibbs earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) 34673b2aab18SMatthew Ahrens return (B_FALSE); 34683b2aab18SMatthew Ahrens 34693b2aab18SMatthew Ahrens if (later->ds_dir == earlier->ds_dir) 34703b2aab18SMatthew Ahrens return (B_TRUE); 34713b2aab18SMatthew Ahrens if (!dsl_dir_is_clone(later->ds_dir)) 34723b2aab18SMatthew Ahrens return (B_FALSE); 34733b2aab18SMatthew Ahrens 3474c1379625SJustin T. Gibbs if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == earlier->ds_object) 34753b2aab18SMatthew Ahrens return (B_TRUE); 34763b2aab18SMatthew Ahrens dsl_dataset_t *origin; 34773b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, 3478c1379625SJustin T. Gibbs dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); 34793b2aab18SMatthew Ahrens if (error != 0) 34803b2aab18SMatthew Ahrens return (B_FALSE); 348178f17100SMatthew Ahrens ret = dsl_dataset_is_before(origin, earlier, earlier_txg); 34823b2aab18SMatthew Ahrens dsl_dataset_rele(origin, FTAG); 34833b2aab18SMatthew Ahrens return (ret); 34843b2aab18SMatthew Ahrens } 34852acef22dSMatthew Ahrens 34862acef22dSMatthew Ahrens void 34872acef22dSMatthew Ahrens dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) 34882acef22dSMatthew Ahrens { 34892acef22dSMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 34902acef22dSMatthew Ahrens dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); 34912acef22dSMatthew Ahrens } 34929c3fd121SMatthew Ahrens 34939c3fd121SMatthew Ahrens boolean_t 34949c3fd121SMatthew Ahrens dsl_dataset_is_zapified(dsl_dataset_t *ds) 34959c3fd121SMatthew Ahrens { 34969c3fd121SMatthew Ahrens dmu_object_info_t doi; 34979c3fd121SMatthew Ahrens 34989c3fd121SMatthew Ahrens dmu_object_info_from_db(ds->ds_dbuf, &doi); 34999c3fd121SMatthew Ahrens return (doi.doi_type == DMU_OTN_ZAP_METADATA); 35009c3fd121SMatthew Ahrens } 35019c3fd121SMatthew Ahrens 35029c3fd121SMatthew Ahrens boolean_t 35039c3fd121SMatthew Ahrens dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds) 35049c3fd121SMatthew Ahrens { 35059c3fd121SMatthew Ahrens return (dsl_dataset_is_zapified(ds) && 35069c3fd121SMatthew Ahrens zap_contains(ds->ds_dir->dd_pool->dp_meta_objset, 35079c3fd121SMatthew Ahrens ds->ds_object, DS_FIELD_RESUME_TOGUID) == 0); 35089c3fd121SMatthew Ahrens } 3509