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 /* 22*55434c77Sek * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 27fa9e4066Sahrens 28fa9e4066Sahrens #include <sys/dmu_objset.h> 29fa9e4066Sahrens #include <sys/dsl_dataset.h> 30fa9e4066Sahrens #include <sys/dsl_dir.h> 3199653d4eSeschrock #include <sys/dsl_prop.h> 321d452cf5Sahrens #include <sys/dsl_synctask.h> 33fa9e4066Sahrens #include <sys/dmu_traverse.h> 34fa9e4066Sahrens #include <sys/dmu_tx.h> 35fa9e4066Sahrens #include <sys/arc.h> 36fa9e4066Sahrens #include <sys/zio.h> 37fa9e4066Sahrens #include <sys/zap.h> 38fa9e4066Sahrens #include <sys/unique.h> 39fa9e4066Sahrens #include <sys/zfs_context.h> 40fa9e4066Sahrens 411d452cf5Sahrens static dsl_checkfunc_t dsl_dataset_destroy_begin_check; 421d452cf5Sahrens static dsl_syncfunc_t dsl_dataset_destroy_begin_sync; 431d452cf5Sahrens static dsl_checkfunc_t dsl_dataset_rollback_check; 441d452cf5Sahrens static dsl_syncfunc_t dsl_dataset_rollback_sync; 451d452cf5Sahrens static dsl_checkfunc_t dsl_dataset_destroy_check; 461d452cf5Sahrens static dsl_syncfunc_t dsl_dataset_destroy_sync; 47e1930233Sbonwick 48*55434c77Sek #define DS_REF_MAX (1ULL << 62) 49fa9e4066Sahrens 50fa9e4066Sahrens #define DSL_DEADLIST_BLOCKSIZE SPA_MAXBLOCKSIZE 51fa9e4066Sahrens 52fa9e4066Sahrens /* 53fa9e4066Sahrens * We use weighted reference counts to express the various forms of exclusion 54fa9e4066Sahrens * between different open modes. A STANDARD open is 1 point, an EXCLUSIVE open 55*55434c77Sek * is DS_REF_MAX, and a PRIMARY open is little more than half of an EXCLUSIVE. 56fa9e4066Sahrens * This makes the exclusion logic simple: the total refcnt for all opens cannot 57*55434c77Sek * exceed DS_REF_MAX. For example, EXCLUSIVE opens are exclusive because their 58*55434c77Sek * weight (DS_REF_MAX) consumes the entire refcnt space. PRIMARY opens consume 59fa9e4066Sahrens * just over half of the refcnt space, so there can't be more than one, but it 60fa9e4066Sahrens * can peacefully coexist with any number of STANDARD opens. 61fa9e4066Sahrens */ 62fa9e4066Sahrens static uint64_t ds_refcnt_weight[DS_MODE_LEVELS] = { 63*55434c77Sek 0, /* DS_MODE_NONE - invalid */ 64*55434c77Sek 1, /* DS_MODE_STANDARD - unlimited number */ 65*55434c77Sek (DS_REF_MAX >> 1) + 1, /* DS_MODE_PRIMARY - only one of these */ 66*55434c77Sek DS_REF_MAX /* DS_MODE_EXCLUSIVE - no other opens */ 67fa9e4066Sahrens }; 68fa9e4066Sahrens 69fa9e4066Sahrens 70fa9e4066Sahrens void 71fa9e4066Sahrens dsl_dataset_block_born(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) 72fa9e4066Sahrens { 7399653d4eSeschrock int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); 74fa9e4066Sahrens int compressed = BP_GET_PSIZE(bp); 75fa9e4066Sahrens int uncompressed = BP_GET_UCSIZE(bp); 76fa9e4066Sahrens 77fa9e4066Sahrens dprintf_bp(bp, "born, ds=%p\n", ds); 78fa9e4066Sahrens 79fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 80fa9e4066Sahrens /* It could have been compressed away to nothing */ 81fa9e4066Sahrens if (BP_IS_HOLE(bp)) 82fa9e4066Sahrens return; 83fa9e4066Sahrens ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); 84fa9e4066Sahrens ASSERT3U(BP_GET_TYPE(bp), <, DMU_OT_NUMTYPES); 85fa9e4066Sahrens if (ds == NULL) { 86fa9e4066Sahrens /* 87fa9e4066Sahrens * Account for the meta-objset space in its placeholder 88fa9e4066Sahrens * dsl_dir. 89fa9e4066Sahrens */ 90fa9e4066Sahrens ASSERT3U(compressed, ==, uncompressed); /* it's all metadata */ 91fa9e4066Sahrens dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, 92fa9e4066Sahrens used, compressed, uncompressed, tx); 93fa9e4066Sahrens dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); 94fa9e4066Sahrens return; 95fa9e4066Sahrens } 96fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 97fa9e4066Sahrens mutex_enter(&ds->ds_lock); 98fa9e4066Sahrens ds->ds_phys->ds_used_bytes += used; 99fa9e4066Sahrens ds->ds_phys->ds_compressed_bytes += compressed; 100fa9e4066Sahrens ds->ds_phys->ds_uncompressed_bytes += uncompressed; 101fa9e4066Sahrens ds->ds_phys->ds_unique_bytes += used; 102fa9e4066Sahrens mutex_exit(&ds->ds_lock); 103fa9e4066Sahrens dsl_dir_diduse_space(ds->ds_dir, 104fa9e4066Sahrens used, compressed, uncompressed, tx); 105fa9e4066Sahrens } 106fa9e4066Sahrens 107fa9e4066Sahrens void 108fa9e4066Sahrens dsl_dataset_block_kill(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) 109fa9e4066Sahrens { 11099653d4eSeschrock int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); 111fa9e4066Sahrens int compressed = BP_GET_PSIZE(bp); 112fa9e4066Sahrens int uncompressed = BP_GET_UCSIZE(bp); 113fa9e4066Sahrens 114fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 115fa9e4066Sahrens if (BP_IS_HOLE(bp)) 116fa9e4066Sahrens return; 117fa9e4066Sahrens 118fa9e4066Sahrens ASSERT(used > 0); 119fa9e4066Sahrens if (ds == NULL) { 120fa9e4066Sahrens /* 121fa9e4066Sahrens * Account for the meta-objset space in its placeholder 122fa9e4066Sahrens * dataset. 123fa9e4066Sahrens */ 124fa9e4066Sahrens /* XXX this can fail, what do we do when it does? */ 125fa9e4066Sahrens (void) arc_free(NULL, tx->tx_pool->dp_spa, 126fa9e4066Sahrens tx->tx_txg, bp, NULL, NULL, ARC_WAIT); 127fa9e4066Sahrens bzero(bp, sizeof (blkptr_t)); 128fa9e4066Sahrens 129fa9e4066Sahrens dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, 130fa9e4066Sahrens -used, -compressed, -uncompressed, tx); 131fa9e4066Sahrens dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); 132fa9e4066Sahrens return; 133fa9e4066Sahrens } 134fa9e4066Sahrens ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); 135fa9e4066Sahrens 136fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 137fa9e4066Sahrens 138fa9e4066Sahrens if (bp->blk_birth > ds->ds_phys->ds_prev_snap_txg) { 139fa9e4066Sahrens dprintf_bp(bp, "freeing: %s", ""); 140fa9e4066Sahrens /* XXX check return code? */ 141fa9e4066Sahrens (void) arc_free(NULL, tx->tx_pool->dp_spa, 142fa9e4066Sahrens tx->tx_txg, bp, NULL, NULL, ARC_WAIT); 143fa9e4066Sahrens 144fa9e4066Sahrens mutex_enter(&ds->ds_lock); 145fa9e4066Sahrens /* XXX unique_bytes is not accurate for head datasets */ 146fa9e4066Sahrens /* ASSERT3U(ds->ds_phys->ds_unique_bytes, >=, used); */ 147fa9e4066Sahrens ds->ds_phys->ds_unique_bytes -= used; 148fa9e4066Sahrens mutex_exit(&ds->ds_lock); 149fa9e4066Sahrens dsl_dir_diduse_space(ds->ds_dir, 150fa9e4066Sahrens -used, -compressed, -uncompressed, tx); 151fa9e4066Sahrens } else { 152fa9e4066Sahrens dprintf_bp(bp, "putting on dead list: %s", ""); 153ea8dc4b6Seschrock VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, bp, tx)); 154fa9e4066Sahrens /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ 155fa9e4066Sahrens if (ds->ds_phys->ds_prev_snap_obj != 0) { 156fa9e4066Sahrens ASSERT3U(ds->ds_prev->ds_object, ==, 157fa9e4066Sahrens ds->ds_phys->ds_prev_snap_obj); 158fa9e4066Sahrens ASSERT(ds->ds_prev->ds_phys->ds_num_children > 0); 159fa9e4066Sahrens if (ds->ds_prev->ds_phys->ds_next_snap_obj == 16099653d4eSeschrock ds->ds_object && bp->blk_birth > 161fa9e4066Sahrens ds->ds_prev->ds_phys->ds_prev_snap_txg) { 162fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 163fa9e4066Sahrens mutex_enter(&ds->ds_prev->ds_lock); 164fa9e4066Sahrens ds->ds_prev->ds_phys->ds_unique_bytes += 165fa9e4066Sahrens used; 166fa9e4066Sahrens mutex_exit(&ds->ds_prev->ds_lock); 167fa9e4066Sahrens } 168fa9e4066Sahrens } 169fa9e4066Sahrens } 170fa9e4066Sahrens bzero(bp, sizeof (blkptr_t)); 171fa9e4066Sahrens mutex_enter(&ds->ds_lock); 172fa9e4066Sahrens ASSERT3U(ds->ds_phys->ds_used_bytes, >=, used); 173fa9e4066Sahrens ds->ds_phys->ds_used_bytes -= used; 174fa9e4066Sahrens ASSERT3U(ds->ds_phys->ds_compressed_bytes, >=, compressed); 175fa9e4066Sahrens ds->ds_phys->ds_compressed_bytes -= compressed; 176fa9e4066Sahrens ASSERT3U(ds->ds_phys->ds_uncompressed_bytes, >=, uncompressed); 177fa9e4066Sahrens ds->ds_phys->ds_uncompressed_bytes -= uncompressed; 178fa9e4066Sahrens mutex_exit(&ds->ds_lock); 179fa9e4066Sahrens } 180fa9e4066Sahrens 181ea8dc4b6Seschrock uint64_t 182ea8dc4b6Seschrock dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) 183fa9e4066Sahrens { 184a2eea2e1Sahrens uint64_t trysnap = 0; 185a2eea2e1Sahrens 186fa9e4066Sahrens if (ds == NULL) 187ea8dc4b6Seschrock return (0); 188fa9e4066Sahrens /* 189fa9e4066Sahrens * The snapshot creation could fail, but that would cause an 190fa9e4066Sahrens * incorrect FALSE return, which would only result in an 191fa9e4066Sahrens * overestimation of the amount of space that an operation would 192fa9e4066Sahrens * consume, which is OK. 193fa9e4066Sahrens * 194fa9e4066Sahrens * There's also a small window where we could miss a pending 195fa9e4066Sahrens * snapshot, because we could set the sync task in the quiescing 196fa9e4066Sahrens * phase. So this should only be used as a guess. 197fa9e4066Sahrens */ 198a2eea2e1Sahrens if (ds->ds_trysnap_txg > 199a2eea2e1Sahrens spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) 200a2eea2e1Sahrens trysnap = ds->ds_trysnap_txg; 201a2eea2e1Sahrens return (MAX(ds->ds_phys->ds_prev_snap_txg, trysnap)); 202ea8dc4b6Seschrock } 203ea8dc4b6Seschrock 204ea8dc4b6Seschrock int 205ea8dc4b6Seschrock dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth) 206ea8dc4b6Seschrock { 207ea8dc4b6Seschrock return (blk_birth > dsl_dataset_prev_snap_txg(ds)); 208fa9e4066Sahrens } 209fa9e4066Sahrens 210fa9e4066Sahrens /* ARGSUSED */ 211fa9e4066Sahrens static void 212fa9e4066Sahrens dsl_dataset_evict(dmu_buf_t *db, void *dsv) 213fa9e4066Sahrens { 214fa9e4066Sahrens dsl_dataset_t *ds = dsv; 215fa9e4066Sahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 216fa9e4066Sahrens 217*55434c77Sek /* open_refcount == DS_REF_MAX when deleting */ 218fa9e4066Sahrens ASSERT(ds->ds_open_refcount == 0 || 219*55434c77Sek ds->ds_open_refcount == DS_REF_MAX); 220fa9e4066Sahrens 221fa9e4066Sahrens dprintf_ds(ds, "evicting %s\n", ""); 222fa9e4066Sahrens 223fa9e4066Sahrens unique_remove(ds->ds_phys->ds_fsid_guid); 224fa9e4066Sahrens 225fa9e4066Sahrens if (ds->ds_user_ptr != NULL) 226fa9e4066Sahrens ds->ds_user_evict_func(ds, ds->ds_user_ptr); 227fa9e4066Sahrens 228fa9e4066Sahrens if (ds->ds_prev) { 229fa9e4066Sahrens dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); 230fa9e4066Sahrens ds->ds_prev = NULL; 231fa9e4066Sahrens } 232fa9e4066Sahrens 233fa9e4066Sahrens bplist_close(&ds->ds_deadlist); 234fa9e4066Sahrens dsl_dir_close(ds->ds_dir, ds); 235fa9e4066Sahrens 236fa9e4066Sahrens if (list_link_active(&ds->ds_synced_link)) 237fa9e4066Sahrens list_remove(&dp->dp_synced_objsets, ds); 238fa9e4066Sahrens 2395ad82045Snd mutex_destroy(&ds->ds_lock); 2405ad82045Snd mutex_destroy(&ds->ds_deadlist.bpl_lock); 2415ad82045Snd 242fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 243fa9e4066Sahrens } 244fa9e4066Sahrens 245ea8dc4b6Seschrock static int 246fa9e4066Sahrens dsl_dataset_get_snapname(dsl_dataset_t *ds) 247fa9e4066Sahrens { 248fa9e4066Sahrens dsl_dataset_phys_t *headphys; 249fa9e4066Sahrens int err; 250fa9e4066Sahrens dmu_buf_t *headdbuf; 251fa9e4066Sahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 252fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 253fa9e4066Sahrens 254fa9e4066Sahrens if (ds->ds_snapname[0]) 255ea8dc4b6Seschrock return (0); 256fa9e4066Sahrens if (ds->ds_phys->ds_next_snap_obj == 0) 257ea8dc4b6Seschrock return (0); 258fa9e4066Sahrens 259ea8dc4b6Seschrock err = dmu_bonus_hold(mos, ds->ds_dir->dd_phys->dd_head_dataset_obj, 260ea8dc4b6Seschrock FTAG, &headdbuf); 261ea8dc4b6Seschrock if (err) 262ea8dc4b6Seschrock return (err); 263fa9e4066Sahrens headphys = headdbuf->db_data; 264fa9e4066Sahrens err = zap_value_search(dp->dp_meta_objset, 265fa9e4066Sahrens headphys->ds_snapnames_zapobj, ds->ds_object, ds->ds_snapname); 266ea8dc4b6Seschrock dmu_buf_rele(headdbuf, FTAG); 267ea8dc4b6Seschrock return (err); 268fa9e4066Sahrens } 269fa9e4066Sahrens 270ea8dc4b6Seschrock int 271fa9e4066Sahrens dsl_dataset_open_obj(dsl_pool_t *dp, uint64_t dsobj, const char *snapname, 272ea8dc4b6Seschrock int mode, void *tag, dsl_dataset_t **dsp) 273fa9e4066Sahrens { 274fa9e4066Sahrens uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; 275fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 276fa9e4066Sahrens dmu_buf_t *dbuf; 277fa9e4066Sahrens dsl_dataset_t *ds; 278ea8dc4b6Seschrock int err; 279fa9e4066Sahrens 280fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || 281fa9e4066Sahrens dsl_pool_sync_context(dp)); 282fa9e4066Sahrens 283ea8dc4b6Seschrock err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); 284ea8dc4b6Seschrock if (err) 285ea8dc4b6Seschrock return (err); 286fa9e4066Sahrens ds = dmu_buf_get_user(dbuf); 287fa9e4066Sahrens if (ds == NULL) { 288fa9e4066Sahrens dsl_dataset_t *winner; 289fa9e4066Sahrens 290fa9e4066Sahrens ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); 291fa9e4066Sahrens ds->ds_dbuf = dbuf; 292fa9e4066Sahrens ds->ds_object = dsobj; 293fa9e4066Sahrens ds->ds_phys = dbuf->db_data; 294fa9e4066Sahrens 2955ad82045Snd mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); 2965ad82045Snd mutex_init(&ds->ds_deadlist.bpl_lock, NULL, MUTEX_DEFAULT, 2975ad82045Snd NULL); 2985ad82045Snd 299ea8dc4b6Seschrock err = bplist_open(&ds->ds_deadlist, 300fa9e4066Sahrens mos, ds->ds_phys->ds_deadlist_obj); 301ea8dc4b6Seschrock if (err == 0) { 302ea8dc4b6Seschrock err = dsl_dir_open_obj(dp, 303ea8dc4b6Seschrock ds->ds_phys->ds_dir_obj, NULL, ds, &ds->ds_dir); 304ea8dc4b6Seschrock } 305ea8dc4b6Seschrock if (err) { 306ea8dc4b6Seschrock /* 307ea8dc4b6Seschrock * we don't really need to close the blist if we 308ea8dc4b6Seschrock * just opened it. 309ea8dc4b6Seschrock */ 3105ad82045Snd mutex_destroy(&ds->ds_lock); 3115ad82045Snd mutex_destroy(&ds->ds_deadlist.bpl_lock); 312ea8dc4b6Seschrock kmem_free(ds, sizeof (dsl_dataset_t)); 313ea8dc4b6Seschrock dmu_buf_rele(dbuf, tag); 314ea8dc4b6Seschrock return (err); 315ea8dc4b6Seschrock } 316fa9e4066Sahrens 317fa9e4066Sahrens if (ds->ds_dir->dd_phys->dd_head_dataset_obj == dsobj) { 318fa9e4066Sahrens ds->ds_snapname[0] = '\0'; 319fa9e4066Sahrens if (ds->ds_phys->ds_prev_snap_obj) { 320ea8dc4b6Seschrock err = dsl_dataset_open_obj(dp, 321fa9e4066Sahrens ds->ds_phys->ds_prev_snap_obj, NULL, 322ea8dc4b6Seschrock DS_MODE_NONE, ds, &ds->ds_prev); 323fa9e4066Sahrens } 324fa9e4066Sahrens } else { 325fa9e4066Sahrens if (snapname) { 326fa9e4066Sahrens #ifdef ZFS_DEBUG 327fa9e4066Sahrens dsl_dataset_phys_t *headphys; 328ea8dc4b6Seschrock dmu_buf_t *headdbuf; 329ea8dc4b6Seschrock err = dmu_bonus_hold(mos, 330ea8dc4b6Seschrock ds->ds_dir->dd_phys->dd_head_dataset_obj, 331ea8dc4b6Seschrock FTAG, &headdbuf); 332ea8dc4b6Seschrock if (err == 0) { 333ea8dc4b6Seschrock headphys = headdbuf->db_data; 334ea8dc4b6Seschrock uint64_t foundobj; 335ea8dc4b6Seschrock err = zap_lookup(dp->dp_meta_objset, 336ea8dc4b6Seschrock headphys->ds_snapnames_zapobj, 337ea8dc4b6Seschrock snapname, sizeof (foundobj), 1, 338ea8dc4b6Seschrock &foundobj); 339ea8dc4b6Seschrock ASSERT3U(foundobj, ==, dsobj); 340ea8dc4b6Seschrock dmu_buf_rele(headdbuf, FTAG); 341ea8dc4b6Seschrock } 342fa9e4066Sahrens #endif 343fa9e4066Sahrens (void) strcat(ds->ds_snapname, snapname); 344fa9e4066Sahrens } else if (zfs_flags & ZFS_DEBUG_SNAPNAMES) { 345ea8dc4b6Seschrock err = dsl_dataset_get_snapname(ds); 346fa9e4066Sahrens } 347fa9e4066Sahrens } 348fa9e4066Sahrens 349ea8dc4b6Seschrock if (err == 0) { 350ea8dc4b6Seschrock winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys, 351ea8dc4b6Seschrock dsl_dataset_evict); 352ea8dc4b6Seschrock } 353ea8dc4b6Seschrock if (err || winner) { 354fa9e4066Sahrens bplist_close(&ds->ds_deadlist); 355fa9e4066Sahrens if (ds->ds_prev) { 356fa9e4066Sahrens dsl_dataset_close(ds->ds_prev, 357fa9e4066Sahrens DS_MODE_NONE, ds); 358fa9e4066Sahrens } 359fa9e4066Sahrens dsl_dir_close(ds->ds_dir, ds); 3605ad82045Snd mutex_destroy(&ds->ds_lock); 3615ad82045Snd mutex_destroy(&ds->ds_deadlist.bpl_lock); 362fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 363ea8dc4b6Seschrock if (err) { 364ea8dc4b6Seschrock dmu_buf_rele(dbuf, tag); 365ea8dc4b6Seschrock return (err); 366ea8dc4b6Seschrock } 367fa9e4066Sahrens ds = winner; 368fa9e4066Sahrens } else { 369fa9e4066Sahrens uint64_t new = 370fa9e4066Sahrens unique_insert(ds->ds_phys->ds_fsid_guid); 371fa9e4066Sahrens if (new != ds->ds_phys->ds_fsid_guid) { 372fa9e4066Sahrens /* XXX it won't necessarily be synced... */ 373fa9e4066Sahrens ds->ds_phys->ds_fsid_guid = new; 374fa9e4066Sahrens } 375fa9e4066Sahrens } 376fa9e4066Sahrens } 377fa9e4066Sahrens ASSERT3P(ds->ds_dbuf, ==, dbuf); 378fa9e4066Sahrens ASSERT3P(ds->ds_phys, ==, dbuf->db_data); 379fa9e4066Sahrens 380fa9e4066Sahrens mutex_enter(&ds->ds_lock); 381fa9e4066Sahrens if ((DS_MODE_LEVEL(mode) == DS_MODE_PRIMARY && 38299653d4eSeschrock (ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) && 38399653d4eSeschrock !DS_MODE_IS_INCONSISTENT(mode)) || 384*55434c77Sek (ds->ds_open_refcount + weight > DS_REF_MAX)) { 385fa9e4066Sahrens mutex_exit(&ds->ds_lock); 386fa9e4066Sahrens dsl_dataset_close(ds, DS_MODE_NONE, tag); 387ea8dc4b6Seschrock return (EBUSY); 388fa9e4066Sahrens } 389fa9e4066Sahrens ds->ds_open_refcount += weight; 390fa9e4066Sahrens mutex_exit(&ds->ds_lock); 391fa9e4066Sahrens 392ea8dc4b6Seschrock *dsp = ds; 393ea8dc4b6Seschrock return (0); 394fa9e4066Sahrens } 395fa9e4066Sahrens 396fa9e4066Sahrens int 397fa9e4066Sahrens dsl_dataset_open_spa(spa_t *spa, const char *name, int mode, 398fa9e4066Sahrens void *tag, dsl_dataset_t **dsp) 399fa9e4066Sahrens { 400fa9e4066Sahrens dsl_dir_t *dd; 401fa9e4066Sahrens dsl_pool_t *dp; 402fa9e4066Sahrens const char *tail; 403fa9e4066Sahrens uint64_t obj; 404fa9e4066Sahrens dsl_dataset_t *ds = NULL; 405fa9e4066Sahrens int err = 0; 406fa9e4066Sahrens 407ea8dc4b6Seschrock err = dsl_dir_open_spa(spa, name, FTAG, &dd, &tail); 408ea8dc4b6Seschrock if (err) 409ea8dc4b6Seschrock return (err); 410fa9e4066Sahrens 411fa9e4066Sahrens dp = dd->dd_pool; 412fa9e4066Sahrens obj = dd->dd_phys->dd_head_dataset_obj; 413fa9e4066Sahrens rw_enter(&dp->dp_config_rwlock, RW_READER); 414fa9e4066Sahrens if (obj == 0) { 415fa9e4066Sahrens /* A dataset with no associated objset */ 416fa9e4066Sahrens err = ENOENT; 417fa9e4066Sahrens goto out; 418fa9e4066Sahrens } 419fa9e4066Sahrens 420fa9e4066Sahrens if (tail != NULL) { 421fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 422fa9e4066Sahrens 423ea8dc4b6Seschrock err = dsl_dataset_open_obj(dp, obj, NULL, 424ea8dc4b6Seschrock DS_MODE_NONE, tag, &ds); 425ea8dc4b6Seschrock if (err) 426ea8dc4b6Seschrock goto out; 427fa9e4066Sahrens obj = ds->ds_phys->ds_snapnames_zapobj; 428fa9e4066Sahrens dsl_dataset_close(ds, DS_MODE_NONE, tag); 429fa9e4066Sahrens ds = NULL; 430fa9e4066Sahrens 431fa9e4066Sahrens if (tail[0] != '@') { 432fa9e4066Sahrens err = ENOENT; 433fa9e4066Sahrens goto out; 434fa9e4066Sahrens } 435fa9e4066Sahrens tail++; 436fa9e4066Sahrens 437fa9e4066Sahrens /* Look for a snapshot */ 438fa9e4066Sahrens if (!DS_MODE_IS_READONLY(mode)) { 439fa9e4066Sahrens err = EROFS; 440fa9e4066Sahrens goto out; 441fa9e4066Sahrens } 442fa9e4066Sahrens dprintf("looking for snapshot '%s'\n", tail); 443fa9e4066Sahrens err = zap_lookup(mos, obj, tail, 8, 1, &obj); 444fa9e4066Sahrens if (err) 445fa9e4066Sahrens goto out; 446fa9e4066Sahrens } 447ea8dc4b6Seschrock err = dsl_dataset_open_obj(dp, obj, tail, mode, tag, &ds); 448fa9e4066Sahrens 449fa9e4066Sahrens out: 450fa9e4066Sahrens rw_exit(&dp->dp_config_rwlock); 451fa9e4066Sahrens dsl_dir_close(dd, FTAG); 452fa9e4066Sahrens 453fa9e4066Sahrens ASSERT3U((err == 0), ==, (ds != NULL)); 454fa9e4066Sahrens /* ASSERT(ds == NULL || strcmp(name, ds->ds_name) == 0); */ 455fa9e4066Sahrens 456fa9e4066Sahrens *dsp = ds; 457fa9e4066Sahrens return (err); 458fa9e4066Sahrens } 459fa9e4066Sahrens 460fa9e4066Sahrens int 461fa9e4066Sahrens dsl_dataset_open(const char *name, int mode, void *tag, dsl_dataset_t **dsp) 462fa9e4066Sahrens { 463fa9e4066Sahrens return (dsl_dataset_open_spa(NULL, name, mode, tag, dsp)); 464fa9e4066Sahrens } 465fa9e4066Sahrens 466fa9e4066Sahrens void 467fa9e4066Sahrens dsl_dataset_name(dsl_dataset_t *ds, char *name) 468fa9e4066Sahrens { 469fa9e4066Sahrens if (ds == NULL) { 470fa9e4066Sahrens (void) strcpy(name, "mos"); 471fa9e4066Sahrens } else { 472fa9e4066Sahrens dsl_dir_name(ds->ds_dir, name); 473ea8dc4b6Seschrock VERIFY(0 == dsl_dataset_get_snapname(ds)); 474fa9e4066Sahrens if (ds->ds_snapname[0]) { 475fa9e4066Sahrens (void) strcat(name, "@"); 476fa9e4066Sahrens if (!MUTEX_HELD(&ds->ds_lock)) { 477fa9e4066Sahrens /* 478fa9e4066Sahrens * We use a "recursive" mutex so that we 479fa9e4066Sahrens * can call dprintf_ds() with ds_lock held. 480fa9e4066Sahrens */ 481fa9e4066Sahrens mutex_enter(&ds->ds_lock); 482fa9e4066Sahrens (void) strcat(name, ds->ds_snapname); 483fa9e4066Sahrens mutex_exit(&ds->ds_lock); 484fa9e4066Sahrens } else { 485fa9e4066Sahrens (void) strcat(name, ds->ds_snapname); 486fa9e4066Sahrens } 487fa9e4066Sahrens } 488fa9e4066Sahrens } 489fa9e4066Sahrens } 490fa9e4066Sahrens 491fa9e4066Sahrens void 492fa9e4066Sahrens dsl_dataset_close(dsl_dataset_t *ds, int mode, void *tag) 493fa9e4066Sahrens { 494fa9e4066Sahrens uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; 495fa9e4066Sahrens mutex_enter(&ds->ds_lock); 496fa9e4066Sahrens ASSERT3U(ds->ds_open_refcount, >=, weight); 497fa9e4066Sahrens ds->ds_open_refcount -= weight; 498fa9e4066Sahrens dprintf_ds(ds, "closing mode %u refcount now 0x%llx\n", 499fa9e4066Sahrens mode, ds->ds_open_refcount); 500fa9e4066Sahrens mutex_exit(&ds->ds_lock); 501fa9e4066Sahrens 502ea8dc4b6Seschrock dmu_buf_rele(ds->ds_dbuf, tag); 503fa9e4066Sahrens } 504fa9e4066Sahrens 505fa9e4066Sahrens void 506fa9e4066Sahrens dsl_dataset_create_root(dsl_pool_t *dp, uint64_t *ddobjp, dmu_tx_t *tx) 507fa9e4066Sahrens { 508fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 509fa9e4066Sahrens dmu_buf_t *dbuf; 510fa9e4066Sahrens dsl_dataset_phys_t *dsphys; 511fa9e4066Sahrens dsl_dataset_t *ds; 512fa9e4066Sahrens uint64_t dsobj; 513fa9e4066Sahrens dsl_dir_t *dd; 514fa9e4066Sahrens 515fa9e4066Sahrens dsl_dir_create_root(mos, ddobjp, tx); 516ea8dc4b6Seschrock VERIFY(0 == dsl_dir_open_obj(dp, *ddobjp, NULL, FTAG, &dd)); 517fa9e4066Sahrens 5181649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 5191649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 520ea8dc4b6Seschrock VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 521fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 522fa9e4066Sahrens dsphys = dbuf->db_data; 523fa9e4066Sahrens dsphys->ds_dir_obj = dd->dd_object; 524fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 525ea8dc4b6Seschrock unique_remove(dsphys->ds_fsid_guid); /* it isn't open yet */ 526fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 527fa9e4066Sahrens sizeof (dsphys->ds_guid)); 528fa9e4066Sahrens dsphys->ds_snapnames_zapobj = 52987e5029aSahrens zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); 530fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 531fa9e4066Sahrens dsphys->ds_creation_txg = tx->tx_txg; 532fa9e4066Sahrens dsphys->ds_deadlist_obj = 533fa9e4066Sahrens bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); 534ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 535fa9e4066Sahrens 536fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 537fa9e4066Sahrens dd->dd_phys->dd_head_dataset_obj = dsobj; 538fa9e4066Sahrens dsl_dir_close(dd, FTAG); 539fa9e4066Sahrens 540ea8dc4b6Seschrock VERIFY(0 == 541ea8dc4b6Seschrock dsl_dataset_open_obj(dp, dsobj, NULL, DS_MODE_NONE, FTAG, &ds)); 542fa9e4066Sahrens (void) dmu_objset_create_impl(dp->dp_spa, ds, DMU_OST_ZFS, tx); 543fa9e4066Sahrens dsl_dataset_close(ds, DS_MODE_NONE, FTAG); 544fa9e4066Sahrens } 545fa9e4066Sahrens 5461d452cf5Sahrens uint64_t 5471d452cf5Sahrens dsl_dataset_create_sync(dsl_dir_t *pdd, 548fa9e4066Sahrens const char *lastname, dsl_dataset_t *clone_parent, dmu_tx_t *tx) 549fa9e4066Sahrens { 5501d452cf5Sahrens dsl_pool_t *dp = pdd->dd_pool; 551fa9e4066Sahrens dmu_buf_t *dbuf; 552fa9e4066Sahrens dsl_dataset_phys_t *dsphys; 5531d452cf5Sahrens uint64_t dsobj, ddobj; 554fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 555fa9e4066Sahrens dsl_dir_t *dd; 556fa9e4066Sahrens 5571d452cf5Sahrens ASSERT(clone_parent == NULL || clone_parent->ds_dir->dd_pool == dp); 5581d452cf5Sahrens ASSERT(clone_parent == NULL || 5591d452cf5Sahrens clone_parent->ds_phys->ds_num_children > 0); 560fa9e4066Sahrens ASSERT(lastname[0] != '@'); 561fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 562fa9e4066Sahrens 5631d452cf5Sahrens ddobj = dsl_dir_create_sync(pdd, lastname, tx); 5641d452cf5Sahrens VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd)); 565fa9e4066Sahrens 5661649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 5671649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 568ea8dc4b6Seschrock VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 569fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 570fa9e4066Sahrens dsphys = dbuf->db_data; 571fa9e4066Sahrens dsphys->ds_dir_obj = dd->dd_object; 572fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 573fa9e4066Sahrens unique_remove(dsphys->ds_fsid_guid); /* it isn't open yet */ 574fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 575fa9e4066Sahrens sizeof (dsphys->ds_guid)); 576fa9e4066Sahrens dsphys->ds_snapnames_zapobj = 57787e5029aSahrens zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); 578fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 579fa9e4066Sahrens dsphys->ds_creation_txg = tx->tx_txg; 580fa9e4066Sahrens dsphys->ds_deadlist_obj = 581fa9e4066Sahrens bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); 582fa9e4066Sahrens if (clone_parent) { 583fa9e4066Sahrens dsphys->ds_prev_snap_obj = clone_parent->ds_object; 584fa9e4066Sahrens dsphys->ds_prev_snap_txg = 585fa9e4066Sahrens clone_parent->ds_phys->ds_creation_txg; 586fa9e4066Sahrens dsphys->ds_used_bytes = 587fa9e4066Sahrens clone_parent->ds_phys->ds_used_bytes; 588fa9e4066Sahrens dsphys->ds_compressed_bytes = 589fa9e4066Sahrens clone_parent->ds_phys->ds_compressed_bytes; 590fa9e4066Sahrens dsphys->ds_uncompressed_bytes = 591fa9e4066Sahrens clone_parent->ds_phys->ds_uncompressed_bytes; 592fa9e4066Sahrens dsphys->ds_bp = clone_parent->ds_phys->ds_bp; 593fa9e4066Sahrens 594fa9e4066Sahrens dmu_buf_will_dirty(clone_parent->ds_dbuf, tx); 595fa9e4066Sahrens clone_parent->ds_phys->ds_num_children++; 596fa9e4066Sahrens 597fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 598fa9e4066Sahrens dd->dd_phys->dd_clone_parent_obj = clone_parent->ds_object; 599fa9e4066Sahrens } 600ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 601fa9e4066Sahrens 602fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 603fa9e4066Sahrens dd->dd_phys->dd_head_dataset_obj = dsobj; 604fa9e4066Sahrens dsl_dir_close(dd, FTAG); 605fa9e4066Sahrens 6061d452cf5Sahrens return (dsobj); 607fa9e4066Sahrens } 608fa9e4066Sahrens 6091d452cf5Sahrens struct destroyarg { 6101d452cf5Sahrens dsl_sync_task_group_t *dstg; 6111d452cf5Sahrens char *snapname; 6121d452cf5Sahrens void *tag; 6131d452cf5Sahrens char *failed; 6141d452cf5Sahrens }; 6151d452cf5Sahrens 6161d452cf5Sahrens static int 6171d452cf5Sahrens dsl_snapshot_destroy_one(char *name, void *arg) 618fa9e4066Sahrens { 6191d452cf5Sahrens struct destroyarg *da = arg; 6201d452cf5Sahrens dsl_dataset_t *ds; 6211d452cf5Sahrens char *cp; 622fa9e4066Sahrens int err; 623fa9e4066Sahrens 6241d452cf5Sahrens (void) strcat(name, "@"); 6251d452cf5Sahrens (void) strcat(name, da->snapname); 6261d452cf5Sahrens err = dsl_dataset_open(name, 6271d452cf5Sahrens DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, 6281d452cf5Sahrens da->tag, &ds); 6291d452cf5Sahrens cp = strchr(name, '@'); 6301d452cf5Sahrens *cp = '\0'; 6311d452cf5Sahrens if (err == ENOENT) 6321d452cf5Sahrens return (0); 6331d452cf5Sahrens if (err) { 6341d452cf5Sahrens (void) strcpy(da->failed, name); 635ea8dc4b6Seschrock return (err); 6361d452cf5Sahrens } 637fa9e4066Sahrens 6381d452cf5Sahrens dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check, 6391d452cf5Sahrens dsl_dataset_destroy_sync, ds, da->tag, 0); 6401d452cf5Sahrens return (0); 6411d452cf5Sahrens } 64231fd60d3Sahrens 6431d452cf5Sahrens /* 6441d452cf5Sahrens * Destroy 'snapname' in all descendants of 'fsname'. 6451d452cf5Sahrens */ 6461d452cf5Sahrens #pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy 6471d452cf5Sahrens int 6481d452cf5Sahrens dsl_snapshots_destroy(char *fsname, char *snapname) 6491d452cf5Sahrens { 6501d452cf5Sahrens int err; 6511d452cf5Sahrens struct destroyarg da; 6521d452cf5Sahrens dsl_sync_task_t *dst; 6531d452cf5Sahrens spa_t *spa; 6541d452cf5Sahrens char *cp; 6551d452cf5Sahrens 6561d452cf5Sahrens cp = strchr(fsname, '/'); 6571d452cf5Sahrens if (cp) { 6581d452cf5Sahrens *cp = '\0'; 6591d452cf5Sahrens err = spa_open(fsname, &spa, FTAG); 6601d452cf5Sahrens *cp = '/'; 6611d452cf5Sahrens } else { 6621d452cf5Sahrens err = spa_open(fsname, &spa, FTAG); 6631d452cf5Sahrens } 6641d452cf5Sahrens if (err) 6651d452cf5Sahrens return (err); 6661d452cf5Sahrens da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); 6671d452cf5Sahrens da.snapname = snapname; 6681d452cf5Sahrens da.tag = FTAG; 6691d452cf5Sahrens da.failed = fsname; 6701d452cf5Sahrens 6711d452cf5Sahrens err = dmu_objset_find(fsname, 6720b69c2f0Sahrens dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN); 6731d452cf5Sahrens 6741d452cf5Sahrens if (err == 0) 6751d452cf5Sahrens err = dsl_sync_task_group_wait(da.dstg); 6761d452cf5Sahrens 6771d452cf5Sahrens for (dst = list_head(&da.dstg->dstg_tasks); dst; 6781d452cf5Sahrens dst = list_next(&da.dstg->dstg_tasks, dst)) { 6791d452cf5Sahrens dsl_dataset_t *ds = dst->dst_arg1; 6801d452cf5Sahrens if (dst->dst_err) { 6811d452cf5Sahrens dsl_dataset_name(ds, fsname); 6821d452cf5Sahrens cp = strchr(fsname, '@'); 6831d452cf5Sahrens *cp = '\0'; 684e1930233Sbonwick } 685fa9e4066Sahrens /* 6861d452cf5Sahrens * If it was successful, destroy_sync would have 6871d452cf5Sahrens * closed the ds 688fa9e4066Sahrens */ 689ea8dc4b6Seschrock if (err) 6901d452cf5Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 691fa9e4066Sahrens } 692fa9e4066Sahrens 6931d452cf5Sahrens dsl_sync_task_group_destroy(da.dstg); 6941d452cf5Sahrens spa_close(spa, FTAG); 695fa9e4066Sahrens return (err); 696fa9e4066Sahrens } 697fa9e4066Sahrens 698fa9e4066Sahrens int 6991d452cf5Sahrens dsl_dataset_destroy(const char *name) 700fa9e4066Sahrens { 701fa9e4066Sahrens int err; 7021d452cf5Sahrens dsl_sync_task_group_t *dstg; 7031d452cf5Sahrens objset_t *os; 7041d452cf5Sahrens dsl_dataset_t *ds; 705fa9e4066Sahrens dsl_dir_t *dd; 7061d452cf5Sahrens uint64_t obj; 7071d452cf5Sahrens 7081d452cf5Sahrens if (strchr(name, '@')) { 7091d452cf5Sahrens /* Destroying a snapshot is simpler */ 7101d452cf5Sahrens err = dsl_dataset_open(name, 7111d452cf5Sahrens DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, 7121d452cf5Sahrens FTAG, &ds); 7131d452cf5Sahrens if (err) 7141d452cf5Sahrens return (err); 7151d452cf5Sahrens err = dsl_sync_task_do(ds->ds_dir->dd_pool, 7161d452cf5Sahrens dsl_dataset_destroy_check, dsl_dataset_destroy_sync, 7171d452cf5Sahrens ds, FTAG, 0); 7181d452cf5Sahrens if (err) 7191d452cf5Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 7201d452cf5Sahrens return (err); 7211d452cf5Sahrens } 722fa9e4066Sahrens 7231d452cf5Sahrens err = dmu_objset_open(name, DMU_OST_ANY, 7241d452cf5Sahrens DS_MODE_EXCLUSIVE | DS_MODE_INCONSISTENT, &os); 725ea8dc4b6Seschrock if (err) 726ea8dc4b6Seschrock return (err); 7271d452cf5Sahrens ds = os->os->os_dsl_dataset; 7281d452cf5Sahrens dd = ds->ds_dir; 729fa9e4066Sahrens 7301d452cf5Sahrens /* 7311d452cf5Sahrens * Check for errors and mark this ds as inconsistent, in 7321d452cf5Sahrens * case we crash while freeing the objects. 7331d452cf5Sahrens */ 7341d452cf5Sahrens err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check, 7351d452cf5Sahrens dsl_dataset_destroy_begin_sync, ds, NULL, 0); 7361d452cf5Sahrens if (err) { 7371d452cf5Sahrens dmu_objset_close(os); 7381d452cf5Sahrens return (err); 739fa9e4066Sahrens } 740fa9e4066Sahrens 7411d452cf5Sahrens /* 7421d452cf5Sahrens * remove the objects in open context, so that we won't 7431d452cf5Sahrens * have too much to do in syncing context. 7441d452cf5Sahrens */ 7456754306eSahrens for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 7466754306eSahrens ds->ds_phys->ds_prev_snap_txg)) { 7471d452cf5Sahrens dmu_tx_t *tx = dmu_tx_create(os); 7481d452cf5Sahrens dmu_tx_hold_free(tx, obj, 0, DMU_OBJECT_END); 7491d452cf5Sahrens dmu_tx_hold_bonus(tx, obj); 7501d452cf5Sahrens err = dmu_tx_assign(tx, TXG_WAIT); 7511d452cf5Sahrens if (err) { 7521d452cf5Sahrens /* 7531d452cf5Sahrens * Perhaps there is not enough disk 7541d452cf5Sahrens * space. Just deal with it from 7551d452cf5Sahrens * dsl_dataset_destroy_sync(). 7561d452cf5Sahrens */ 7571d452cf5Sahrens dmu_tx_abort(tx); 7581d452cf5Sahrens continue; 7591d452cf5Sahrens } 7601d452cf5Sahrens VERIFY(0 == dmu_object_free(os, obj, tx)); 7611d452cf5Sahrens dmu_tx_commit(tx); 7621d452cf5Sahrens } 7631d452cf5Sahrens /* Make sure it's not dirty before we finish destroying it. */ 7641d452cf5Sahrens txg_wait_synced(dd->dd_pool, 0); 7651d452cf5Sahrens 7661d452cf5Sahrens dmu_objset_close(os); 7671d452cf5Sahrens if (err != ESRCH) 7681d452cf5Sahrens return (err); 7691d452cf5Sahrens 7701d452cf5Sahrens err = dsl_dataset_open(name, 7711d452cf5Sahrens DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, 7721d452cf5Sahrens FTAG, &ds); 7731d452cf5Sahrens if (err) 7741d452cf5Sahrens return (err); 7751d452cf5Sahrens 7761d452cf5Sahrens err = dsl_dir_open(name, FTAG, &dd, NULL); 7771d452cf5Sahrens if (err) { 7781d452cf5Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 7791d452cf5Sahrens return (err); 7801d452cf5Sahrens } 7811d452cf5Sahrens 7821d452cf5Sahrens /* 7831d452cf5Sahrens * Blow away the dsl_dir + head dataset. 7841d452cf5Sahrens */ 7851d452cf5Sahrens dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool); 7861d452cf5Sahrens dsl_sync_task_create(dstg, dsl_dataset_destroy_check, 7871d452cf5Sahrens dsl_dataset_destroy_sync, ds, FTAG, 0); 7881d452cf5Sahrens dsl_sync_task_create(dstg, dsl_dir_destroy_check, 7891d452cf5Sahrens dsl_dir_destroy_sync, dd, FTAG, 0); 7901d452cf5Sahrens err = dsl_sync_task_group_wait(dstg); 7911d452cf5Sahrens dsl_sync_task_group_destroy(dstg); 7921d452cf5Sahrens /* if it is successful, *destroy_sync will close the ds+dd */ 7931d452cf5Sahrens if (err) { 7941d452cf5Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 7951d452cf5Sahrens dsl_dir_close(dd, FTAG); 7961d452cf5Sahrens } 797fa9e4066Sahrens return (err); 798fa9e4066Sahrens } 799fa9e4066Sahrens 8001d452cf5Sahrens int 8011d452cf5Sahrens dsl_dataset_rollback(dsl_dataset_t *ds) 8021d452cf5Sahrens { 803*55434c77Sek ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); 8041d452cf5Sahrens return (dsl_sync_task_do(ds->ds_dir->dd_pool, 8051d452cf5Sahrens dsl_dataset_rollback_check, dsl_dataset_rollback_sync, 8061d452cf5Sahrens ds, NULL, 0)); 8071d452cf5Sahrens } 8081d452cf5Sahrens 809fa9e4066Sahrens void * 810fa9e4066Sahrens dsl_dataset_set_user_ptr(dsl_dataset_t *ds, 811fa9e4066Sahrens void *p, dsl_dataset_evict_func_t func) 812fa9e4066Sahrens { 813fa9e4066Sahrens void *old; 814fa9e4066Sahrens 815fa9e4066Sahrens mutex_enter(&ds->ds_lock); 816fa9e4066Sahrens old = ds->ds_user_ptr; 817fa9e4066Sahrens if (old == NULL) { 818fa9e4066Sahrens ds->ds_user_ptr = p; 819fa9e4066Sahrens ds->ds_user_evict_func = func; 820fa9e4066Sahrens } 821fa9e4066Sahrens mutex_exit(&ds->ds_lock); 822fa9e4066Sahrens return (old); 823fa9e4066Sahrens } 824fa9e4066Sahrens 825fa9e4066Sahrens void * 826fa9e4066Sahrens dsl_dataset_get_user_ptr(dsl_dataset_t *ds) 827fa9e4066Sahrens { 828fa9e4066Sahrens return (ds->ds_user_ptr); 829fa9e4066Sahrens } 830fa9e4066Sahrens 831fa9e4066Sahrens 832fa9e4066Sahrens void 833fa9e4066Sahrens dsl_dataset_get_blkptr(dsl_dataset_t *ds, blkptr_t *bp) 834fa9e4066Sahrens { 835fa9e4066Sahrens *bp = ds->ds_phys->ds_bp; 836fa9e4066Sahrens } 837fa9e4066Sahrens 838fa9e4066Sahrens void 839fa9e4066Sahrens dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) 840fa9e4066Sahrens { 841fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 842fa9e4066Sahrens /* If it's the meta-objset, set dp_meta_rootbp */ 843fa9e4066Sahrens if (ds == NULL) { 844fa9e4066Sahrens tx->tx_pool->dp_meta_rootbp = *bp; 845fa9e4066Sahrens } else { 846fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 847fa9e4066Sahrens ds->ds_phys->ds_bp = *bp; 848fa9e4066Sahrens } 849fa9e4066Sahrens } 850fa9e4066Sahrens 851fa9e4066Sahrens spa_t * 852fa9e4066Sahrens dsl_dataset_get_spa(dsl_dataset_t *ds) 853fa9e4066Sahrens { 854fa9e4066Sahrens return (ds->ds_dir->dd_pool->dp_spa); 855fa9e4066Sahrens } 856fa9e4066Sahrens 857fa9e4066Sahrens void 858fa9e4066Sahrens dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) 859fa9e4066Sahrens { 860fa9e4066Sahrens dsl_pool_t *dp; 861fa9e4066Sahrens 862fa9e4066Sahrens if (ds == NULL) /* this is the meta-objset */ 863fa9e4066Sahrens return; 864fa9e4066Sahrens 865fa9e4066Sahrens ASSERT(ds->ds_user_ptr != NULL); 866a2eea2e1Sahrens 867a2eea2e1Sahrens if (ds->ds_phys->ds_next_snap_obj != 0) 868a2eea2e1Sahrens panic("dirtying snapshot!"); 869fa9e4066Sahrens 870fa9e4066Sahrens dp = ds->ds_dir->dd_pool; 871fa9e4066Sahrens 872fa9e4066Sahrens if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) { 873fa9e4066Sahrens /* up the hold count until we can be written out */ 874fa9e4066Sahrens dmu_buf_add_ref(ds->ds_dbuf, ds); 875fa9e4066Sahrens } 876fa9e4066Sahrens } 877fa9e4066Sahrens 878fa9e4066Sahrens struct killarg { 879fa9e4066Sahrens uint64_t *usedp; 880fa9e4066Sahrens uint64_t *compressedp; 881fa9e4066Sahrens uint64_t *uncompressedp; 882fa9e4066Sahrens zio_t *zio; 883fa9e4066Sahrens dmu_tx_t *tx; 884fa9e4066Sahrens }; 885fa9e4066Sahrens 886fa9e4066Sahrens static int 887fa9e4066Sahrens kill_blkptr(traverse_blk_cache_t *bc, spa_t *spa, void *arg) 888fa9e4066Sahrens { 889fa9e4066Sahrens struct killarg *ka = arg; 890fa9e4066Sahrens blkptr_t *bp = &bc->bc_blkptr; 891fa9e4066Sahrens 892fa9e4066Sahrens ASSERT3U(bc->bc_errno, ==, 0); 893fa9e4066Sahrens 894fa9e4066Sahrens /* 895fa9e4066Sahrens * Since this callback is not called concurrently, no lock is 896fa9e4066Sahrens * needed on the accounting values. 897fa9e4066Sahrens */ 89899653d4eSeschrock *ka->usedp += bp_get_dasize(spa, bp); 899fa9e4066Sahrens *ka->compressedp += BP_GET_PSIZE(bp); 900fa9e4066Sahrens *ka->uncompressedp += BP_GET_UCSIZE(bp); 901fa9e4066Sahrens /* XXX check for EIO? */ 902fa9e4066Sahrens (void) arc_free(ka->zio, spa, ka->tx->tx_txg, bp, NULL, NULL, 903fa9e4066Sahrens ARC_NOWAIT); 904fa9e4066Sahrens return (0); 905fa9e4066Sahrens } 906fa9e4066Sahrens 907fa9e4066Sahrens /* ARGSUSED */ 9081d452cf5Sahrens static int 9091d452cf5Sahrens dsl_dataset_rollback_check(void *arg1, void *arg2, dmu_tx_t *tx) 910fa9e4066Sahrens { 9111d452cf5Sahrens dsl_dataset_t *ds = arg1; 912fa9e4066Sahrens 9131d452cf5Sahrens /* 9141d452cf5Sahrens * There must be a previous snapshot. I suppose we could roll 9151d452cf5Sahrens * it back to being empty (and re-initialize the upper (ZPL) 9161d452cf5Sahrens * layer). But for now there's no way to do this via the user 9171d452cf5Sahrens * interface. 9181d452cf5Sahrens */ 9191d452cf5Sahrens if (ds->ds_phys->ds_prev_snap_txg == 0) 920fa9e4066Sahrens return (EINVAL); 921fa9e4066Sahrens 9221d452cf5Sahrens /* 9231d452cf5Sahrens * This must not be a snapshot. 9241d452cf5Sahrens */ 9251d452cf5Sahrens if (ds->ds_phys->ds_next_snap_obj != 0) 926fa9e4066Sahrens return (EINVAL); 927fa9e4066Sahrens 928fa9e4066Sahrens /* 929fa9e4066Sahrens * If we made changes this txg, traverse_dsl_dataset won't find 930fa9e4066Sahrens * them. Try again. 931fa9e4066Sahrens */ 9321d452cf5Sahrens if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) 933fa9e4066Sahrens return (EAGAIN); 934fa9e4066Sahrens 9351d452cf5Sahrens return (0); 9361d452cf5Sahrens } 9371d452cf5Sahrens 9381d452cf5Sahrens /* ARGSUSED */ 9391d452cf5Sahrens static void 9401d452cf5Sahrens dsl_dataset_rollback_sync(void *arg1, void *arg2, dmu_tx_t *tx) 9411d452cf5Sahrens { 9421d452cf5Sahrens dsl_dataset_t *ds = arg1; 9431d452cf5Sahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 944fa9e4066Sahrens 945fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 946fa9e4066Sahrens 947fa9e4066Sahrens /* Zero out the deadlist. */ 948fa9e4066Sahrens bplist_close(&ds->ds_deadlist); 949fa9e4066Sahrens bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); 950fa9e4066Sahrens ds->ds_phys->ds_deadlist_obj = 951fa9e4066Sahrens bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); 952ea8dc4b6Seschrock VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, 953ea8dc4b6Seschrock ds->ds_phys->ds_deadlist_obj)); 954fa9e4066Sahrens 955fa9e4066Sahrens { 956fa9e4066Sahrens /* Free blkptrs that we gave birth to */ 957fa9e4066Sahrens zio_t *zio; 958fa9e4066Sahrens uint64_t used = 0, compressed = 0, uncompressed = 0; 959fa9e4066Sahrens struct killarg ka; 960fa9e4066Sahrens 961fa9e4066Sahrens zio = zio_root(tx->tx_pool->dp_spa, NULL, NULL, 962fa9e4066Sahrens ZIO_FLAG_MUSTSUCCEED); 963fa9e4066Sahrens ka.usedp = &used; 964fa9e4066Sahrens ka.compressedp = &compressed; 965fa9e4066Sahrens ka.uncompressedp = &uncompressed; 966fa9e4066Sahrens ka.zio = zio; 967fa9e4066Sahrens ka.tx = tx; 968fa9e4066Sahrens (void) traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, 969fa9e4066Sahrens ADVANCE_POST, kill_blkptr, &ka); 970fa9e4066Sahrens (void) zio_wait(zio); 971fa9e4066Sahrens 9721d452cf5Sahrens dsl_dir_diduse_space(ds->ds_dir, 973fa9e4066Sahrens -used, -compressed, -uncompressed, tx); 974fa9e4066Sahrens } 975fa9e4066Sahrens 9761d452cf5Sahrens /* Change our contents to that of the prev snapshot */ 977fa9e4066Sahrens ASSERT3U(ds->ds_prev->ds_object, ==, ds->ds_phys->ds_prev_snap_obj); 978fa9e4066Sahrens ds->ds_phys->ds_bp = ds->ds_prev->ds_phys->ds_bp; 979fa9e4066Sahrens ds->ds_phys->ds_used_bytes = ds->ds_prev->ds_phys->ds_used_bytes; 980fa9e4066Sahrens ds->ds_phys->ds_compressed_bytes = 981fa9e4066Sahrens ds->ds_prev->ds_phys->ds_compressed_bytes; 982fa9e4066Sahrens ds->ds_phys->ds_uncompressed_bytes = 983fa9e4066Sahrens ds->ds_prev->ds_phys->ds_uncompressed_bytes; 98499653d4eSeschrock ds->ds_phys->ds_flags = ds->ds_prev->ds_phys->ds_flags; 985fa9e4066Sahrens ds->ds_phys->ds_unique_bytes = 0; 986fa9e4066Sahrens 98785edac42Sahrens if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { 98885edac42Sahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 98985edac42Sahrens ds->ds_prev->ds_phys->ds_unique_bytes = 0; 99085edac42Sahrens } 991fa9e4066Sahrens } 992fa9e4066Sahrens 993e1930233Sbonwick /* ARGSUSED */ 994e1930233Sbonwick static int 9951d452cf5Sahrens dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx) 996e1930233Sbonwick { 9971d452cf5Sahrens dsl_dataset_t *ds = arg1; 998e1930233Sbonwick 999e1930233Sbonwick /* 1000e1930233Sbonwick * Can't delete a head dataset if there are snapshots of it. 1001e1930233Sbonwick * (Except if the only snapshots are from the branch we cloned 1002e1930233Sbonwick * from.) 1003e1930233Sbonwick */ 1004e1930233Sbonwick if (ds->ds_prev != NULL && 1005e1930233Sbonwick ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) 1006e1930233Sbonwick return (EINVAL); 1007e1930233Sbonwick 1008e1930233Sbonwick return (0); 1009e1930233Sbonwick } 1010e1930233Sbonwick 10111d452cf5Sahrens /* ARGSUSED */ 10121d452cf5Sahrens static void 10131d452cf5Sahrens dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, dmu_tx_t *tx) 1014fa9e4066Sahrens { 10151d452cf5Sahrens dsl_dataset_t *ds = arg1; 1016fa9e4066Sahrens 10171d452cf5Sahrens /* Mark it as inconsistent on-disk, in case we crash */ 10181d452cf5Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 10191d452cf5Sahrens ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; 10201d452cf5Sahrens } 1021fa9e4066Sahrens 10221d452cf5Sahrens /* ARGSUSED */ 10231d452cf5Sahrens static int 10241d452cf5Sahrens dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) 10251d452cf5Sahrens { 10261d452cf5Sahrens dsl_dataset_t *ds = arg1; 1027fa9e4066Sahrens 1028fa9e4066Sahrens /* Can't delete a branch point. */ 10291d452cf5Sahrens if (ds->ds_phys->ds_num_children > 1) 10301d452cf5Sahrens return (EEXIST); 1031fa9e4066Sahrens 1032fa9e4066Sahrens /* 1033fa9e4066Sahrens * Can't delete a head dataset if there are snapshots of it. 1034fa9e4066Sahrens * (Except if the only snapshots are from the branch we cloned 1035fa9e4066Sahrens * from.) 1036fa9e4066Sahrens */ 1037fa9e4066Sahrens if (ds->ds_prev != NULL && 10381d452cf5Sahrens ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) 1039fa9e4066Sahrens return (EINVAL); 1040fa9e4066Sahrens 1041fa9e4066Sahrens /* 1042fa9e4066Sahrens * If we made changes this txg, traverse_dsl_dataset won't find 1043fa9e4066Sahrens * them. Try again. 1044fa9e4066Sahrens */ 10451d452cf5Sahrens if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) 1046fa9e4066Sahrens return (EAGAIN); 10471d452cf5Sahrens 10481d452cf5Sahrens /* XXX we should do some i/o error checking... */ 10491d452cf5Sahrens return (0); 10501d452cf5Sahrens } 10511d452cf5Sahrens 10521d452cf5Sahrens static void 10531d452cf5Sahrens dsl_dataset_destroy_sync(void *arg1, void *tag, dmu_tx_t *tx) 10541d452cf5Sahrens { 10551d452cf5Sahrens dsl_dataset_t *ds = arg1; 10561d452cf5Sahrens uint64_t used = 0, compressed = 0, uncompressed = 0; 10571d452cf5Sahrens zio_t *zio; 10581d452cf5Sahrens int err; 10591d452cf5Sahrens int after_branch_point = FALSE; 10601d452cf5Sahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 10611d452cf5Sahrens objset_t *mos = dp->dp_meta_objset; 10621d452cf5Sahrens dsl_dataset_t *ds_prev = NULL; 10631d452cf5Sahrens uint64_t obj; 10641d452cf5Sahrens 1065*55434c77Sek ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); 10661d452cf5Sahrens ASSERT3U(ds->ds_phys->ds_num_children, <=, 1); 10671d452cf5Sahrens ASSERT(ds->ds_prev == NULL || 10681d452cf5Sahrens ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object); 10691d452cf5Sahrens ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg); 10701d452cf5Sahrens 10711d452cf5Sahrens ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); 10721d452cf5Sahrens 10731d452cf5Sahrens obj = ds->ds_object; 1074fa9e4066Sahrens 1075fa9e4066Sahrens if (ds->ds_phys->ds_prev_snap_obj != 0) { 1076fa9e4066Sahrens if (ds->ds_prev) { 1077fa9e4066Sahrens ds_prev = ds->ds_prev; 1078fa9e4066Sahrens } else { 10791d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 1080fa9e4066Sahrens ds->ds_phys->ds_prev_snap_obj, NULL, 10811d452cf5Sahrens DS_MODE_NONE, FTAG, &ds_prev)); 1082fa9e4066Sahrens } 1083fa9e4066Sahrens after_branch_point = 1084fa9e4066Sahrens (ds_prev->ds_phys->ds_next_snap_obj != obj); 1085fa9e4066Sahrens 1086fa9e4066Sahrens dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); 1087fa9e4066Sahrens if (after_branch_point && 1088fa9e4066Sahrens ds->ds_phys->ds_next_snap_obj == 0) { 1089fa9e4066Sahrens /* This clone is toast. */ 1090fa9e4066Sahrens ASSERT(ds_prev->ds_phys->ds_num_children > 1); 1091fa9e4066Sahrens ds_prev->ds_phys->ds_num_children--; 1092fa9e4066Sahrens } else if (!after_branch_point) { 1093fa9e4066Sahrens ds_prev->ds_phys->ds_next_snap_obj = 1094fa9e4066Sahrens ds->ds_phys->ds_next_snap_obj; 1095fa9e4066Sahrens } 1096fa9e4066Sahrens } 1097fa9e4066Sahrens 1098fa9e4066Sahrens zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1099fa9e4066Sahrens 1100fa9e4066Sahrens if (ds->ds_phys->ds_next_snap_obj != 0) { 11011d452cf5Sahrens blkptr_t bp; 1102fa9e4066Sahrens dsl_dataset_t *ds_next; 1103fa9e4066Sahrens uint64_t itor = 0; 1104fa9e4066Sahrens 1105fa9e4066Sahrens spa_scrub_restart(dp->dp_spa, tx->tx_txg); 1106fa9e4066Sahrens 11071d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 1108ea8dc4b6Seschrock ds->ds_phys->ds_next_snap_obj, NULL, 1109ea8dc4b6Seschrock DS_MODE_NONE, FTAG, &ds_next)); 1110fa9e4066Sahrens ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj); 1111fa9e4066Sahrens 1112fa9e4066Sahrens dmu_buf_will_dirty(ds_next->ds_dbuf, tx); 1113fa9e4066Sahrens ds_next->ds_phys->ds_prev_snap_obj = 1114fa9e4066Sahrens ds->ds_phys->ds_prev_snap_obj; 1115fa9e4066Sahrens ds_next->ds_phys->ds_prev_snap_txg = 1116fa9e4066Sahrens ds->ds_phys->ds_prev_snap_txg; 1117fa9e4066Sahrens ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, 1118fa9e4066Sahrens ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0); 1119fa9e4066Sahrens 1120fa9e4066Sahrens /* 1121fa9e4066Sahrens * Transfer to our deadlist (which will become next's 1122fa9e4066Sahrens * new deadlist) any entries from next's current 1123fa9e4066Sahrens * deadlist which were born before prev, and free the 1124fa9e4066Sahrens * other entries. 1125fa9e4066Sahrens * 1126fa9e4066Sahrens * XXX we're doing this long task with the config lock held 1127fa9e4066Sahrens */ 1128fa9e4066Sahrens while (bplist_iterate(&ds_next->ds_deadlist, &itor, 1129fa9e4066Sahrens &bp) == 0) { 1130fa9e4066Sahrens if (bp.blk_birth <= ds->ds_phys->ds_prev_snap_txg) { 1131ea8dc4b6Seschrock VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, 1132ea8dc4b6Seschrock &bp, tx)); 1133fa9e4066Sahrens if (ds_prev && !after_branch_point && 1134fa9e4066Sahrens bp.blk_birth > 1135fa9e4066Sahrens ds_prev->ds_phys->ds_prev_snap_txg) { 1136fa9e4066Sahrens ds_prev->ds_phys->ds_unique_bytes += 113799653d4eSeschrock bp_get_dasize(dp->dp_spa, &bp); 1138fa9e4066Sahrens } 1139fa9e4066Sahrens } else { 114099653d4eSeschrock used += bp_get_dasize(dp->dp_spa, &bp); 1141fa9e4066Sahrens compressed += BP_GET_PSIZE(&bp); 1142fa9e4066Sahrens uncompressed += BP_GET_UCSIZE(&bp); 1143fa9e4066Sahrens /* XXX check return value? */ 1144fa9e4066Sahrens (void) arc_free(zio, dp->dp_spa, tx->tx_txg, 1145fa9e4066Sahrens &bp, NULL, NULL, ARC_NOWAIT); 1146fa9e4066Sahrens } 1147fa9e4066Sahrens } 1148fa9e4066Sahrens 1149fa9e4066Sahrens /* free next's deadlist */ 1150fa9e4066Sahrens bplist_close(&ds_next->ds_deadlist); 1151fa9e4066Sahrens bplist_destroy(mos, ds_next->ds_phys->ds_deadlist_obj, tx); 1152fa9e4066Sahrens 1153fa9e4066Sahrens /* set next's deadlist to our deadlist */ 1154fa9e4066Sahrens ds_next->ds_phys->ds_deadlist_obj = 1155fa9e4066Sahrens ds->ds_phys->ds_deadlist_obj; 1156ea8dc4b6Seschrock VERIFY(0 == bplist_open(&ds_next->ds_deadlist, mos, 1157ea8dc4b6Seschrock ds_next->ds_phys->ds_deadlist_obj)); 1158fa9e4066Sahrens ds->ds_phys->ds_deadlist_obj = 0; 1159fa9e4066Sahrens 1160fa9e4066Sahrens if (ds_next->ds_phys->ds_next_snap_obj != 0) { 1161fa9e4066Sahrens /* 1162fa9e4066Sahrens * Update next's unique to include blocks which 1163fa9e4066Sahrens * were previously shared by only this snapshot 1164fa9e4066Sahrens * and it. Those blocks will be born after the 1165fa9e4066Sahrens * prev snap and before this snap, and will have 1166fa9e4066Sahrens * died after the next snap and before the one 1167fa9e4066Sahrens * after that (ie. be on the snap after next's 1168fa9e4066Sahrens * deadlist). 1169fa9e4066Sahrens * 1170fa9e4066Sahrens * XXX we're doing this long task with the 1171fa9e4066Sahrens * config lock held 1172fa9e4066Sahrens */ 1173fa9e4066Sahrens dsl_dataset_t *ds_after_next; 1174fa9e4066Sahrens 11751d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 1176fa9e4066Sahrens ds_next->ds_phys->ds_next_snap_obj, NULL, 1177ea8dc4b6Seschrock DS_MODE_NONE, FTAG, &ds_after_next)); 1178fa9e4066Sahrens itor = 0; 1179fa9e4066Sahrens while (bplist_iterate(&ds_after_next->ds_deadlist, 1180fa9e4066Sahrens &itor, &bp) == 0) { 1181fa9e4066Sahrens if (bp.blk_birth > 1182fa9e4066Sahrens ds->ds_phys->ds_prev_snap_txg && 1183fa9e4066Sahrens bp.blk_birth <= 1184fa9e4066Sahrens ds->ds_phys->ds_creation_txg) { 1185fa9e4066Sahrens ds_next->ds_phys->ds_unique_bytes += 118699653d4eSeschrock bp_get_dasize(dp->dp_spa, &bp); 1187fa9e4066Sahrens } 1188fa9e4066Sahrens } 1189fa9e4066Sahrens 1190fa9e4066Sahrens dsl_dataset_close(ds_after_next, DS_MODE_NONE, FTAG); 1191fa9e4066Sahrens ASSERT3P(ds_next->ds_prev, ==, NULL); 1192fa9e4066Sahrens } else { 1193fa9e4066Sahrens /* 1194fa9e4066Sahrens * It would be nice to update the head dataset's 1195fa9e4066Sahrens * unique. To do so we would have to traverse 1196fa9e4066Sahrens * it for blocks born after ds_prev, which is 1197fa9e4066Sahrens * pretty expensive just to maintain something 1198fa9e4066Sahrens * for debugging purposes. 1199fa9e4066Sahrens */ 1200fa9e4066Sahrens ASSERT3P(ds_next->ds_prev, ==, ds); 1201fa9e4066Sahrens dsl_dataset_close(ds_next->ds_prev, DS_MODE_NONE, 1202fa9e4066Sahrens ds_next); 1203fa9e4066Sahrens if (ds_prev) { 12041d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 1205ea8dc4b6Seschrock ds->ds_phys->ds_prev_snap_obj, NULL, 1206ea8dc4b6Seschrock DS_MODE_NONE, ds_next, &ds_next->ds_prev)); 1207fa9e4066Sahrens } else { 1208fa9e4066Sahrens ds_next->ds_prev = NULL; 1209fa9e4066Sahrens } 1210fa9e4066Sahrens } 1211fa9e4066Sahrens dsl_dataset_close(ds_next, DS_MODE_NONE, FTAG); 1212fa9e4066Sahrens 1213fa9e4066Sahrens /* 1214fa9e4066Sahrens * NB: unique_bytes is not accurate for head objsets 1215fa9e4066Sahrens * because we don't update it when we delete the most 1216fa9e4066Sahrens * recent snapshot -- see above comment. 1217fa9e4066Sahrens */ 1218fa9e4066Sahrens ASSERT3U(used, ==, ds->ds_phys->ds_unique_bytes); 1219fa9e4066Sahrens } else { 1220fa9e4066Sahrens /* 1221fa9e4066Sahrens * There's no next snapshot, so this is a head dataset. 1222fa9e4066Sahrens * Destroy the deadlist. Unless it's a clone, the 1223fa9e4066Sahrens * deadlist should be empty. (If it's a clone, it's 1224fa9e4066Sahrens * safe to ignore the deadlist contents.) 1225fa9e4066Sahrens */ 1226fa9e4066Sahrens struct killarg ka; 1227fa9e4066Sahrens 1228fa9e4066Sahrens ASSERT(after_branch_point || bplist_empty(&ds->ds_deadlist)); 1229fa9e4066Sahrens bplist_close(&ds->ds_deadlist); 1230fa9e4066Sahrens bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); 1231fa9e4066Sahrens ds->ds_phys->ds_deadlist_obj = 0; 1232fa9e4066Sahrens 1233fa9e4066Sahrens /* 1234fa9e4066Sahrens * Free everything that we point to (that's born after 1235fa9e4066Sahrens * the previous snapshot, if we are a clone) 1236fa9e4066Sahrens * 1237fa9e4066Sahrens * XXX we're doing this long task with the config lock held 1238fa9e4066Sahrens */ 1239fa9e4066Sahrens ka.usedp = &used; 1240fa9e4066Sahrens ka.compressedp = &compressed; 1241fa9e4066Sahrens ka.uncompressedp = &uncompressed; 1242fa9e4066Sahrens ka.zio = zio; 1243fa9e4066Sahrens ka.tx = tx; 1244fa9e4066Sahrens err = traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, 1245fa9e4066Sahrens ADVANCE_POST, kill_blkptr, &ka); 1246fa9e4066Sahrens ASSERT3U(err, ==, 0); 1247fa9e4066Sahrens } 1248fa9e4066Sahrens 1249fa9e4066Sahrens err = zio_wait(zio); 1250fa9e4066Sahrens ASSERT3U(err, ==, 0); 1251fa9e4066Sahrens 12521d452cf5Sahrens dsl_dir_diduse_space(ds->ds_dir, -used, -compressed, -uncompressed, tx); 1253fa9e4066Sahrens 1254fa9e4066Sahrens if (ds->ds_phys->ds_snapnames_zapobj) { 1255fa9e4066Sahrens err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx); 1256fa9e4066Sahrens ASSERT(err == 0); 1257fa9e4066Sahrens } 1258fa9e4066Sahrens 12591d452cf5Sahrens if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) { 1260fa9e4066Sahrens /* Erase the link in the dataset */ 12611d452cf5Sahrens dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); 12621d452cf5Sahrens ds->ds_dir->dd_phys->dd_head_dataset_obj = 0; 1263fa9e4066Sahrens /* 1264fa9e4066Sahrens * dsl_dir_sync_destroy() called us, they'll destroy 1265fa9e4066Sahrens * the dataset. 1266fa9e4066Sahrens */ 1267fa9e4066Sahrens } else { 1268fa9e4066Sahrens /* remove from snapshot namespace */ 1269fa9e4066Sahrens dsl_dataset_t *ds_head; 12701d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 12711d452cf5Sahrens ds->ds_dir->dd_phys->dd_head_dataset_obj, NULL, 1272ea8dc4b6Seschrock DS_MODE_NONE, FTAG, &ds_head)); 12738660574dSahrens VERIFY(0 == dsl_dataset_get_snapname(ds)); 1274fa9e4066Sahrens #ifdef ZFS_DEBUG 1275fa9e4066Sahrens { 1276fa9e4066Sahrens uint64_t val; 1277fa9e4066Sahrens err = zap_lookup(mos, 1278fa9e4066Sahrens ds_head->ds_phys->ds_snapnames_zapobj, 12791d452cf5Sahrens ds->ds_snapname, 8, 1, &val); 1280fa9e4066Sahrens ASSERT3U(err, ==, 0); 1281fa9e4066Sahrens ASSERT3U(val, ==, obj); 1282fa9e4066Sahrens } 1283fa9e4066Sahrens #endif 1284fa9e4066Sahrens err = zap_remove(mos, ds_head->ds_phys->ds_snapnames_zapobj, 12851d452cf5Sahrens ds->ds_snapname, tx); 1286fa9e4066Sahrens ASSERT(err == 0); 1287fa9e4066Sahrens dsl_dataset_close(ds_head, DS_MODE_NONE, FTAG); 1288fa9e4066Sahrens } 1289fa9e4066Sahrens 1290fa9e4066Sahrens if (ds_prev && ds->ds_prev != ds_prev) 1291fa9e4066Sahrens dsl_dataset_close(ds_prev, DS_MODE_NONE, FTAG); 1292fa9e4066Sahrens 12931d452cf5Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); 12941d452cf5Sahrens VERIFY(0 == dmu_object_free(mos, obj, tx)); 1295fa9e4066Sahrens } 1296fa9e4066Sahrens 12971d452cf5Sahrens /* ARGSUSED */ 1298fa9e4066Sahrens int 12991d452cf5Sahrens dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) 1300fa9e4066Sahrens { 13011d452cf5Sahrens objset_t *os = arg1; 13021d452cf5Sahrens dsl_dataset_t *ds = os->os->os_dsl_dataset; 13031d452cf5Sahrens const char *snapname = arg2; 13041d452cf5Sahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 1305fa9e4066Sahrens int err; 13061d452cf5Sahrens uint64_t value; 1307fa9e4066Sahrens 13081d452cf5Sahrens /* 13091d452cf5Sahrens * We don't allow multiple snapshots of the same txg. If there 13101d452cf5Sahrens * is already one, try again. 13111d452cf5Sahrens */ 13121d452cf5Sahrens if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg) 13131d452cf5Sahrens return (EAGAIN); 1314fa9e4066Sahrens 13151d452cf5Sahrens /* 13161d452cf5Sahrens * Check for conflicting name snapshot name. 13171d452cf5Sahrens */ 1318fa9e4066Sahrens err = zap_lookup(mos, ds->ds_phys->ds_snapnames_zapobj, 1319fa9e4066Sahrens snapname, 8, 1, &value); 13201d452cf5Sahrens if (err == 0) 1321fa9e4066Sahrens return (EEXIST); 13221d452cf5Sahrens if (err != ENOENT) 13231d452cf5Sahrens return (err); 1324fa9e4066Sahrens 13251d452cf5Sahrens ds->ds_trysnap_txg = tx->tx_txg; 13261d452cf5Sahrens return (0); 13271d452cf5Sahrens } 1328fa9e4066Sahrens 13291d452cf5Sahrens void 13301d452cf5Sahrens dsl_dataset_snapshot_sync(void *arg1, void *arg2, dmu_tx_t *tx) 13311d452cf5Sahrens { 13321d452cf5Sahrens objset_t *os = arg1; 13331d452cf5Sahrens dsl_dataset_t *ds = os->os->os_dsl_dataset; 13341d452cf5Sahrens const char *snapname = arg2; 13351d452cf5Sahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 13361d452cf5Sahrens dmu_buf_t *dbuf; 13371d452cf5Sahrens dsl_dataset_phys_t *dsphys; 13381d452cf5Sahrens uint64_t dsobj; 13391d452cf5Sahrens objset_t *mos = dp->dp_meta_objset; 13401d452cf5Sahrens int err; 1341fa9e4066Sahrens 1342fa9e4066Sahrens spa_scrub_restart(dp->dp_spa, tx->tx_txg); 13431d452cf5Sahrens ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); 1344fa9e4066Sahrens 13451649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 13461649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 1347ea8dc4b6Seschrock VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 1348fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 1349fa9e4066Sahrens dsphys = dbuf->db_data; 13501d452cf5Sahrens dsphys->ds_dir_obj = ds->ds_dir->dd_object; 1351fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 1352fa9e4066Sahrens unique_remove(dsphys->ds_fsid_guid); /* it isn't open yet */ 1353fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 1354fa9e4066Sahrens sizeof (dsphys->ds_guid)); 1355fa9e4066Sahrens dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj; 1356fa9e4066Sahrens dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg; 1357fa9e4066Sahrens dsphys->ds_next_snap_obj = ds->ds_object; 1358fa9e4066Sahrens dsphys->ds_num_children = 1; 1359fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 1360fa9e4066Sahrens dsphys->ds_creation_txg = tx->tx_txg; 1361fa9e4066Sahrens dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj; 1362fa9e4066Sahrens dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes; 1363fa9e4066Sahrens dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes; 1364fa9e4066Sahrens dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes; 136599653d4eSeschrock dsphys->ds_flags = ds->ds_phys->ds_flags; 1366fa9e4066Sahrens dsphys->ds_bp = ds->ds_phys->ds_bp; 1367ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 1368fa9e4066Sahrens 13691d452cf5Sahrens ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0); 13701d452cf5Sahrens if (ds->ds_prev) { 13711d452cf5Sahrens ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj == 1372fa9e4066Sahrens ds->ds_object || 13731d452cf5Sahrens ds->ds_prev->ds_phys->ds_num_children > 1); 13741d452cf5Sahrens if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { 13751d452cf5Sahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 1376fa9e4066Sahrens ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, 13771d452cf5Sahrens ds->ds_prev->ds_phys->ds_creation_txg); 13781d452cf5Sahrens ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj; 1379fa9e4066Sahrens } 1380fa9e4066Sahrens } 1381fa9e4066Sahrens 1382fa9e4066Sahrens bplist_close(&ds->ds_deadlist); 1383fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1384fa9e4066Sahrens ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, dsphys->ds_creation_txg); 1385fa9e4066Sahrens ds->ds_phys->ds_prev_snap_obj = dsobj; 1386fa9e4066Sahrens ds->ds_phys->ds_prev_snap_txg = dsphys->ds_creation_txg; 1387fa9e4066Sahrens ds->ds_phys->ds_unique_bytes = 0; 1388fa9e4066Sahrens ds->ds_phys->ds_deadlist_obj = 1389fa9e4066Sahrens bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); 1390ea8dc4b6Seschrock VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, 1391ea8dc4b6Seschrock ds->ds_phys->ds_deadlist_obj)); 1392fa9e4066Sahrens 1393fa9e4066Sahrens dprintf("snap '%s' -> obj %llu\n", snapname, dsobj); 1394fa9e4066Sahrens err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj, 1395fa9e4066Sahrens snapname, 8, 1, &dsobj, tx); 1396fa9e4066Sahrens ASSERT(err == 0); 1397fa9e4066Sahrens 1398fa9e4066Sahrens if (ds->ds_prev) 1399fa9e4066Sahrens dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); 1400ea8dc4b6Seschrock VERIFY(0 == dsl_dataset_open_obj(dp, 1401ea8dc4b6Seschrock ds->ds_phys->ds_prev_snap_obj, snapname, 1402ea8dc4b6Seschrock DS_MODE_NONE, ds, &ds->ds_prev)); 1403fa9e4066Sahrens } 1404fa9e4066Sahrens 1405fa9e4066Sahrens void 1406fa9e4066Sahrens dsl_dataset_sync(dsl_dataset_t *ds, dmu_tx_t *tx) 1407fa9e4066Sahrens { 1408fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 1409fa9e4066Sahrens ASSERT(ds->ds_user_ptr != NULL); 1410fa9e4066Sahrens ASSERT(ds->ds_phys->ds_next_snap_obj == 0); 1411fa9e4066Sahrens 1412fa9e4066Sahrens dmu_objset_sync(ds->ds_user_ptr, tx); 1413fa9e4066Sahrens dsl_dir_dirty(ds->ds_dir, tx); 1414fa9e4066Sahrens bplist_close(&ds->ds_deadlist); 1415fa9e4066Sahrens 1416ea8dc4b6Seschrock dmu_buf_rele(ds->ds_dbuf, ds); 1417fa9e4066Sahrens } 1418fa9e4066Sahrens 1419fa9e4066Sahrens void 1420a2eea2e1Sahrens dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) 1421fa9e4066Sahrens { 1422a2eea2e1Sahrens dsl_dir_stats(ds->ds_dir, nv); 1423fa9e4066Sahrens 1424a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, 1425a2eea2e1Sahrens ds->ds_phys->ds_creation_time); 1426a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, 1427a2eea2e1Sahrens ds->ds_phys->ds_creation_txg); 1428a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, 1429a2eea2e1Sahrens ds->ds_phys->ds_used_bytes); 1430fa9e4066Sahrens 1431fa9e4066Sahrens if (ds->ds_phys->ds_next_snap_obj) { 1432fa9e4066Sahrens /* 1433fa9e4066Sahrens * This is a snapshot; override the dd's space used with 1434a2eea2e1Sahrens * our unique space and compression ratio. 1435fa9e4066Sahrens */ 1436a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, 1437a2eea2e1Sahrens ds->ds_phys->ds_unique_bytes); 1438a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, 1439a2eea2e1Sahrens ds->ds_phys->ds_compressed_bytes == 0 ? 100 : 1440a2eea2e1Sahrens (ds->ds_phys->ds_uncompressed_bytes * 100 / 1441a2eea2e1Sahrens ds->ds_phys->ds_compressed_bytes)); 1442fa9e4066Sahrens } 1443fa9e4066Sahrens } 1444fa9e4066Sahrens 1445a2eea2e1Sahrens void 1446a2eea2e1Sahrens dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) 1447a2eea2e1Sahrens { 1448a2eea2e1Sahrens stat->dds_creation_txg = ds->ds_phys->ds_creation_txg; 1449a2eea2e1Sahrens stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT; 1450a2eea2e1Sahrens if (ds->ds_phys->ds_next_snap_obj) { 1451a2eea2e1Sahrens stat->dds_is_snapshot = B_TRUE; 1452a2eea2e1Sahrens stat->dds_num_clones = ds->ds_phys->ds_num_children - 1; 1453a2eea2e1Sahrens } 1454a2eea2e1Sahrens 1455a2eea2e1Sahrens /* clone origin is really a dsl_dir thing... */ 1456a2eea2e1Sahrens if (ds->ds_dir->dd_phys->dd_clone_parent_obj) { 1457a2eea2e1Sahrens dsl_dataset_t *ods; 1458a2eea2e1Sahrens 1459a2eea2e1Sahrens rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); 1460a2eea2e1Sahrens VERIFY(0 == dsl_dataset_open_obj(ds->ds_dir->dd_pool, 1461a2eea2e1Sahrens ds->ds_dir->dd_phys->dd_clone_parent_obj, 1462a2eea2e1Sahrens NULL, DS_MODE_NONE, FTAG, &ods)); 1463a2eea2e1Sahrens dsl_dataset_name(ods, stat->dds_clone_of); 1464a2eea2e1Sahrens dsl_dataset_close(ods, DS_MODE_NONE, FTAG); 1465a2eea2e1Sahrens rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); 1466a2eea2e1Sahrens } 1467a2eea2e1Sahrens } 1468a2eea2e1Sahrens 1469a2eea2e1Sahrens uint64_t 1470a2eea2e1Sahrens dsl_dataset_fsid_guid(dsl_dataset_t *ds) 1471a2eea2e1Sahrens { 1472a2eea2e1Sahrens return (ds->ds_phys->ds_fsid_guid); 1473a2eea2e1Sahrens } 1474a2eea2e1Sahrens 1475a2eea2e1Sahrens void 1476a2eea2e1Sahrens dsl_dataset_space(dsl_dataset_t *ds, 1477a2eea2e1Sahrens uint64_t *refdbytesp, uint64_t *availbytesp, 1478a2eea2e1Sahrens uint64_t *usedobjsp, uint64_t *availobjsp) 1479fa9e4066Sahrens { 1480a2eea2e1Sahrens *refdbytesp = ds->ds_phys->ds_used_bytes; 1481a2eea2e1Sahrens *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); 1482a2eea2e1Sahrens *usedobjsp = ds->ds_phys->ds_bp.blk_fill; 1483a2eea2e1Sahrens *availobjsp = DN_MAX_OBJECT - *usedobjsp; 1484fa9e4066Sahrens } 1485fa9e4066Sahrens 14861d452cf5Sahrens /* ARGSUSED */ 1487fa9e4066Sahrens static int 14881d452cf5Sahrens dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) 1489fa9e4066Sahrens { 14901d452cf5Sahrens dsl_dataset_t *ds = arg1; 14911d452cf5Sahrens char *newsnapname = arg2; 14921d452cf5Sahrens dsl_dir_t *dd = ds->ds_dir; 1493fa9e4066Sahrens objset_t *mos = dd->dd_pool->dp_meta_objset; 14941d452cf5Sahrens dsl_dataset_t *hds; 1495fa9e4066Sahrens uint64_t val; 14961d452cf5Sahrens int err; 1497fa9e4066Sahrens 14981d452cf5Sahrens err = dsl_dataset_open_obj(dd->dd_pool, 14991d452cf5Sahrens dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds); 1500fa9e4066Sahrens if (err) 1501fa9e4066Sahrens return (err); 1502fa9e4066Sahrens 15031d452cf5Sahrens /* new name better not be in use */ 15041d452cf5Sahrens err = zap_lookup(mos, hds->ds_phys->ds_snapnames_zapobj, 15051d452cf5Sahrens newsnapname, 8, 1, &val); 15061d452cf5Sahrens dsl_dataset_close(hds, DS_MODE_NONE, FTAG); 15071d452cf5Sahrens 15081d452cf5Sahrens if (err == 0) 15091d452cf5Sahrens err = EEXIST; 15101d452cf5Sahrens else if (err == ENOENT) 15111d452cf5Sahrens err = 0; 15121d452cf5Sahrens return (err); 15131d452cf5Sahrens } 1514fa9e4066Sahrens 15151d452cf5Sahrens static void 15161d452cf5Sahrens dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, dmu_tx_t *tx) 15171d452cf5Sahrens { 15181d452cf5Sahrens dsl_dataset_t *ds = arg1; 15191d452cf5Sahrens char *newsnapname = arg2; 15201d452cf5Sahrens dsl_dir_t *dd = ds->ds_dir; 15211d452cf5Sahrens objset_t *mos = dd->dd_pool->dp_meta_objset; 15221d452cf5Sahrens dsl_dataset_t *hds; 15231d452cf5Sahrens int err; 1524fa9e4066Sahrens 15251d452cf5Sahrens ASSERT(ds->ds_phys->ds_next_snap_obj != 0); 1526fa9e4066Sahrens 15271d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, 15281d452cf5Sahrens dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds)); 1529fa9e4066Sahrens 15301d452cf5Sahrens VERIFY(0 == dsl_dataset_get_snapname(ds)); 15311d452cf5Sahrens err = zap_remove(mos, hds->ds_phys->ds_snapnames_zapobj, 15321d452cf5Sahrens ds->ds_snapname, tx); 1533fa9e4066Sahrens ASSERT3U(err, ==, 0); 15341d452cf5Sahrens mutex_enter(&ds->ds_lock); 15351d452cf5Sahrens (void) strcpy(ds->ds_snapname, newsnapname); 15361d452cf5Sahrens mutex_exit(&ds->ds_lock); 15371d452cf5Sahrens err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj, 15381d452cf5Sahrens ds->ds_snapname, 8, 1, &ds->ds_object, tx); 1539fa9e4066Sahrens ASSERT3U(err, ==, 0); 1540fa9e4066Sahrens 15411d452cf5Sahrens dsl_dataset_close(hds, DS_MODE_NONE, FTAG); 1542fa9e4066Sahrens } 1543fa9e4066Sahrens 1544fa9e4066Sahrens #pragma weak dmu_objset_rename = dsl_dataset_rename 1545fa9e4066Sahrens int 15461d452cf5Sahrens dsl_dataset_rename(const char *oldname, const char *newname) 1547fa9e4066Sahrens { 1548fa9e4066Sahrens dsl_dir_t *dd; 15491d452cf5Sahrens dsl_dataset_t *ds; 1550fa9e4066Sahrens const char *tail; 1551fa9e4066Sahrens int err; 1552fa9e4066Sahrens 15531d452cf5Sahrens err = dsl_dir_open(oldname, FTAG, &dd, &tail); 1554ea8dc4b6Seschrock if (err) 1555ea8dc4b6Seschrock return (err); 1556fa9e4066Sahrens if (tail == NULL) { 15571d452cf5Sahrens err = dsl_dir_rename(dd, newname); 1558fa9e4066Sahrens dsl_dir_close(dd, FTAG); 1559fa9e4066Sahrens return (err); 1560fa9e4066Sahrens } 1561fa9e4066Sahrens if (tail[0] != '@') { 1562fa9e4066Sahrens /* the name ended in a nonexistant component */ 1563fa9e4066Sahrens dsl_dir_close(dd, FTAG); 1564fa9e4066Sahrens return (ENOENT); 1565fa9e4066Sahrens } 1566fa9e4066Sahrens 1567fa9e4066Sahrens dsl_dir_close(dd, FTAG); 15681d452cf5Sahrens 15691d452cf5Sahrens /* new name must be snapshot in same filesystem */ 15701d452cf5Sahrens tail = strchr(newname, '@'); 15711d452cf5Sahrens if (tail == NULL) 15721d452cf5Sahrens return (EINVAL); 15731d452cf5Sahrens tail++; 15741d452cf5Sahrens if (strncmp(oldname, newname, tail - newname) != 0) 15751d452cf5Sahrens return (EXDEV); 15761d452cf5Sahrens 15771d452cf5Sahrens err = dsl_dataset_open(oldname, 15781d452cf5Sahrens DS_MODE_READONLY | DS_MODE_STANDARD, FTAG, &ds); 15791d452cf5Sahrens if (err) 15801d452cf5Sahrens return (err); 15811d452cf5Sahrens 15821d452cf5Sahrens err = dsl_sync_task_do(ds->ds_dir->dd_pool, 15831d452cf5Sahrens dsl_dataset_snapshot_rename_check, 15841d452cf5Sahrens dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1); 15851d452cf5Sahrens 15861d452cf5Sahrens dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); 15871d452cf5Sahrens 1588fa9e4066Sahrens return (err); 1589fa9e4066Sahrens } 159099653d4eSeschrock 15911d452cf5Sahrens struct promotearg { 15921d452cf5Sahrens uint64_t used, comp, uncomp, unique; 15931d452cf5Sahrens uint64_t newnext_obj, snapnames_obj; 15941d452cf5Sahrens }; 15951d452cf5Sahrens 159699653d4eSeschrock static int 15971d452cf5Sahrens dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx) 159899653d4eSeschrock { 15991d452cf5Sahrens dsl_dataset_t *hds = arg1; 16001d452cf5Sahrens struct promotearg *pa = arg2; 16011d452cf5Sahrens dsl_dir_t *dd = hds->ds_dir; 16021d452cf5Sahrens dsl_pool_t *dp = hds->ds_dir->dd_pool; 160399653d4eSeschrock dsl_dir_t *pdd = NULL; 160499653d4eSeschrock dsl_dataset_t *ds = NULL; 160599653d4eSeschrock dsl_dataset_t *pivot_ds = NULL; 160699653d4eSeschrock dsl_dataset_t *newnext_ds = NULL; 160799653d4eSeschrock int err; 160899653d4eSeschrock char *name = NULL; 16091d452cf5Sahrens uint64_t itor = 0; 161099653d4eSeschrock blkptr_t bp; 161199653d4eSeschrock 16121d452cf5Sahrens bzero(pa, sizeof (*pa)); 16131d452cf5Sahrens 161499653d4eSeschrock /* Check that it is a clone */ 161599653d4eSeschrock if (dd->dd_phys->dd_clone_parent_obj == 0) 161699653d4eSeschrock return (EINVAL); 161799653d4eSeschrock 16181d452cf5Sahrens /* Since this is so expensive, don't do the preliminary check */ 16191d452cf5Sahrens if (!dmu_tx_is_syncing(tx)) 16201d452cf5Sahrens return (0); 16211d452cf5Sahrens 16221d452cf5Sahrens if (err = dsl_dataset_open_obj(dp, 162399653d4eSeschrock dd->dd_phys->dd_clone_parent_obj, 162499653d4eSeschrock NULL, DS_MODE_EXCLUSIVE, FTAG, &pivot_ds)) 162599653d4eSeschrock goto out; 162699653d4eSeschrock pdd = pivot_ds->ds_dir; 16271d452cf5Sahrens 16281d452cf5Sahrens { 16291d452cf5Sahrens dsl_dataset_t *phds; 16301d452cf5Sahrens if (err = dsl_dataset_open_obj(dd->dd_pool, 16311d452cf5Sahrens pdd->dd_phys->dd_head_dataset_obj, 16321d452cf5Sahrens NULL, DS_MODE_NONE, FTAG, &phds)) 16331d452cf5Sahrens goto out; 16341d452cf5Sahrens pa->snapnames_obj = phds->ds_phys->ds_snapnames_zapobj; 16351d452cf5Sahrens dsl_dataset_close(phds, DS_MODE_NONE, FTAG); 16361d452cf5Sahrens } 163799653d4eSeschrock 163899653d4eSeschrock if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE) { 163999653d4eSeschrock err = EXDEV; 164099653d4eSeschrock goto out; 164199653d4eSeschrock } 164299653d4eSeschrock 164399653d4eSeschrock /* find pivot point's new next ds */ 164499653d4eSeschrock VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, hds->ds_object, 164599653d4eSeschrock NULL, DS_MODE_NONE, FTAG, &newnext_ds)); 164699653d4eSeschrock while (newnext_ds->ds_phys->ds_prev_snap_obj != pivot_ds->ds_object) { 164799653d4eSeschrock dsl_dataset_t *prev; 164899653d4eSeschrock 164999653d4eSeschrock if (err = dsl_dataset_open_obj(dd->dd_pool, 16501d452cf5Sahrens newnext_ds->ds_phys->ds_prev_snap_obj, 16511d452cf5Sahrens NULL, DS_MODE_NONE, FTAG, &prev)) 165299653d4eSeschrock goto out; 165399653d4eSeschrock dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); 165499653d4eSeschrock newnext_ds = prev; 165599653d4eSeschrock } 16561d452cf5Sahrens pa->newnext_obj = newnext_ds->ds_object; 165799653d4eSeschrock 165899653d4eSeschrock /* compute pivot point's new unique space */ 165999653d4eSeschrock while ((err = bplist_iterate(&newnext_ds->ds_deadlist, 166099653d4eSeschrock &itor, &bp)) == 0) { 166199653d4eSeschrock if (bp.blk_birth > pivot_ds->ds_phys->ds_prev_snap_txg) 16621d452cf5Sahrens pa->unique += bp_get_dasize(dd->dd_pool->dp_spa, &bp); 166399653d4eSeschrock } 166499653d4eSeschrock if (err != ENOENT) 166599653d4eSeschrock goto out; 166699653d4eSeschrock 166799653d4eSeschrock /* Walk the snapshots that we are moving */ 166899653d4eSeschrock name = kmem_alloc(MAXPATHLEN, KM_SLEEP); 166999653d4eSeschrock ds = pivot_ds; 167099653d4eSeschrock /* CONSTCOND */ 167199653d4eSeschrock while (TRUE) { 167299653d4eSeschrock uint64_t val, dlused, dlcomp, dluncomp; 167399653d4eSeschrock dsl_dataset_t *prev; 167499653d4eSeschrock 167599653d4eSeschrock /* Check that the snapshot name does not conflict */ 167699653d4eSeschrock dsl_dataset_name(ds, name); 167799653d4eSeschrock err = zap_lookup(dd->dd_pool->dp_meta_objset, 167899653d4eSeschrock hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, 167999653d4eSeschrock 8, 1, &val); 168099653d4eSeschrock if (err != ENOENT) { 168199653d4eSeschrock if (err == 0) 168299653d4eSeschrock err = EEXIST; 168399653d4eSeschrock goto out; 168499653d4eSeschrock } 168599653d4eSeschrock 168699653d4eSeschrock /* 168799653d4eSeschrock * compute space to transfer. Each snapshot gave birth to: 168899653d4eSeschrock * (my used) - (prev's used) + (deadlist's used) 168999653d4eSeschrock */ 16901d452cf5Sahrens pa->used += ds->ds_phys->ds_used_bytes; 16911d452cf5Sahrens pa->comp += ds->ds_phys->ds_compressed_bytes; 16921d452cf5Sahrens pa->uncomp += ds->ds_phys->ds_uncompressed_bytes; 169399653d4eSeschrock 169499653d4eSeschrock /* If we reach the first snapshot, we're done. */ 169599653d4eSeschrock if (ds->ds_phys->ds_prev_snap_obj == 0) 169699653d4eSeschrock break; 169799653d4eSeschrock 169899653d4eSeschrock if (err = bplist_space(&ds->ds_deadlist, 169999653d4eSeschrock &dlused, &dlcomp, &dluncomp)) 170099653d4eSeschrock goto out; 170199653d4eSeschrock if (err = dsl_dataset_open_obj(dd->dd_pool, 170299653d4eSeschrock ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, 170399653d4eSeschrock FTAG, &prev)) 170499653d4eSeschrock goto out; 17051d452cf5Sahrens pa->used += dlused - prev->ds_phys->ds_used_bytes; 17061d452cf5Sahrens pa->comp += dlcomp - prev->ds_phys->ds_compressed_bytes; 17071d452cf5Sahrens pa->uncomp += dluncomp - prev->ds_phys->ds_uncompressed_bytes; 170899653d4eSeschrock 170999653d4eSeschrock /* 171099653d4eSeschrock * We could be a clone of a clone. If we reach our 171199653d4eSeschrock * parent's branch point, we're done. 171299653d4eSeschrock */ 171399653d4eSeschrock if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { 171499653d4eSeschrock dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); 171599653d4eSeschrock break; 171699653d4eSeschrock } 171799653d4eSeschrock if (ds != pivot_ds) 171899653d4eSeschrock dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 171999653d4eSeschrock ds = prev; 172099653d4eSeschrock } 172199653d4eSeschrock 172299653d4eSeschrock /* Check that there is enough space here */ 17231d452cf5Sahrens err = dsl_dir_transfer_possible(pdd, dd, pa->used); 17241d452cf5Sahrens 17251d452cf5Sahrens out: 17261d452cf5Sahrens if (ds && ds != pivot_ds) 17271d452cf5Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 17281d452cf5Sahrens if (pivot_ds) 17291d452cf5Sahrens dsl_dataset_close(pivot_ds, DS_MODE_EXCLUSIVE, FTAG); 17301d452cf5Sahrens if (newnext_ds) 17311d452cf5Sahrens dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); 17321d452cf5Sahrens if (name) 17331d452cf5Sahrens kmem_free(name, MAXPATHLEN); 17341d452cf5Sahrens return (err); 17351d452cf5Sahrens } 173699653d4eSeschrock 17371d452cf5Sahrens static void 17381d452cf5Sahrens dsl_dataset_promote_sync(void *arg1, void *arg2, dmu_tx_t *tx) 17391d452cf5Sahrens { 17401d452cf5Sahrens dsl_dataset_t *hds = arg1; 17411d452cf5Sahrens struct promotearg *pa = arg2; 17421d452cf5Sahrens dsl_dir_t *dd = hds->ds_dir; 17431d452cf5Sahrens dsl_pool_t *dp = hds->ds_dir->dd_pool; 17441d452cf5Sahrens dsl_dir_t *pdd = NULL; 17451d452cf5Sahrens dsl_dataset_t *ds, *pivot_ds; 17461d452cf5Sahrens char *name; 17471d452cf5Sahrens 17481d452cf5Sahrens ASSERT(dd->dd_phys->dd_clone_parent_obj != 0); 17491d452cf5Sahrens ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)); 17501d452cf5Sahrens 17511d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 17521d452cf5Sahrens dd->dd_phys->dd_clone_parent_obj, 17531d452cf5Sahrens NULL, DS_MODE_EXCLUSIVE, FTAG, &pivot_ds)); 17540b69c2f0Sahrens /* 17550b69c2f0Sahrens * We need to explicitly open pdd, since pivot_ds's pdd will be 17560b69c2f0Sahrens * changing. 17570b69c2f0Sahrens */ 17580b69c2f0Sahrens VERIFY(0 == dsl_dir_open_obj(dp, pivot_ds->ds_dir->dd_object, 17590b69c2f0Sahrens NULL, FTAG, &pdd)); 176099653d4eSeschrock 176199653d4eSeschrock /* move snapshots to this dir */ 17621d452cf5Sahrens name = kmem_alloc(MAXPATHLEN, KM_SLEEP); 176399653d4eSeschrock ds = pivot_ds; 176499653d4eSeschrock /* CONSTCOND */ 176599653d4eSeschrock while (TRUE) { 176699653d4eSeschrock dsl_dataset_t *prev; 176799653d4eSeschrock 176899653d4eSeschrock /* move snap name entry */ 176999653d4eSeschrock dsl_dataset_name(ds, name); 17701d452cf5Sahrens VERIFY(0 == zap_remove(dp->dp_meta_objset, 17711d452cf5Sahrens pa->snapnames_obj, ds->ds_snapname, tx)); 17721d452cf5Sahrens VERIFY(0 == zap_add(dp->dp_meta_objset, 177399653d4eSeschrock hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, 177499653d4eSeschrock 8, 1, &ds->ds_object, tx)); 177599653d4eSeschrock 177699653d4eSeschrock /* change containing dsl_dir */ 177799653d4eSeschrock dmu_buf_will_dirty(ds->ds_dbuf, tx); 177899653d4eSeschrock ASSERT3U(ds->ds_phys->ds_dir_obj, ==, pdd->dd_object); 177999653d4eSeschrock ds->ds_phys->ds_dir_obj = dd->dd_object; 178099653d4eSeschrock ASSERT3P(ds->ds_dir, ==, pdd); 178199653d4eSeschrock dsl_dir_close(ds->ds_dir, ds); 17821d452cf5Sahrens VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, 178399653d4eSeschrock NULL, ds, &ds->ds_dir)); 178499653d4eSeschrock 178599653d4eSeschrock ASSERT3U(dsl_prop_numcb(ds), ==, 0); 178699653d4eSeschrock 178799653d4eSeschrock if (ds->ds_phys->ds_prev_snap_obj == 0) 178899653d4eSeschrock break; 178999653d4eSeschrock 17901d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 179199653d4eSeschrock ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, 179299653d4eSeschrock FTAG, &prev)); 179399653d4eSeschrock 179499653d4eSeschrock if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { 179599653d4eSeschrock dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); 179699653d4eSeschrock break; 179799653d4eSeschrock } 179899653d4eSeschrock if (ds != pivot_ds) 179999653d4eSeschrock dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 180099653d4eSeschrock ds = prev; 180199653d4eSeschrock } 18021d452cf5Sahrens if (ds != pivot_ds) 18031d452cf5Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 180499653d4eSeschrock 180599653d4eSeschrock /* change pivot point's next snap */ 180699653d4eSeschrock dmu_buf_will_dirty(pivot_ds->ds_dbuf, tx); 18071d452cf5Sahrens pivot_ds->ds_phys->ds_next_snap_obj = pa->newnext_obj; 180899653d4eSeschrock 180999653d4eSeschrock /* change clone_parent-age */ 181099653d4eSeschrock dmu_buf_will_dirty(dd->dd_dbuf, tx); 181199653d4eSeschrock ASSERT3U(dd->dd_phys->dd_clone_parent_obj, ==, pivot_ds->ds_object); 181299653d4eSeschrock dd->dd_phys->dd_clone_parent_obj = pdd->dd_phys->dd_clone_parent_obj; 181399653d4eSeschrock dmu_buf_will_dirty(pdd->dd_dbuf, tx); 181499653d4eSeschrock pdd->dd_phys->dd_clone_parent_obj = pivot_ds->ds_object; 181599653d4eSeschrock 181699653d4eSeschrock /* change space accounting */ 18171d452cf5Sahrens dsl_dir_diduse_space(pdd, -pa->used, -pa->comp, -pa->uncomp, tx); 18181d452cf5Sahrens dsl_dir_diduse_space(dd, pa->used, pa->comp, pa->uncomp, tx); 18191d452cf5Sahrens pivot_ds->ds_phys->ds_unique_bytes = pa->unique; 182099653d4eSeschrock 18210b69c2f0Sahrens dsl_dir_close(pdd, FTAG); 18221d452cf5Sahrens dsl_dataset_close(pivot_ds, DS_MODE_EXCLUSIVE, FTAG); 18231d452cf5Sahrens kmem_free(name, MAXPATHLEN); 182499653d4eSeschrock } 182599653d4eSeschrock 182699653d4eSeschrock int 182799653d4eSeschrock dsl_dataset_promote(const char *name) 182899653d4eSeschrock { 182999653d4eSeschrock dsl_dataset_t *ds; 183099653d4eSeschrock int err; 183199653d4eSeschrock dmu_object_info_t doi; 18321d452cf5Sahrens struct promotearg pa; 183399653d4eSeschrock 183499653d4eSeschrock err = dsl_dataset_open(name, DS_MODE_NONE, FTAG, &ds); 183599653d4eSeschrock if (err) 183699653d4eSeschrock return (err); 183799653d4eSeschrock 183899653d4eSeschrock err = dmu_object_info(ds->ds_dir->dd_pool->dp_meta_objset, 183999653d4eSeschrock ds->ds_phys->ds_snapnames_zapobj, &doi); 184099653d4eSeschrock if (err) { 184199653d4eSeschrock dsl_dataset_close(ds, DS_MODE_NONE, FTAG); 184299653d4eSeschrock return (err); 184399653d4eSeschrock } 184499653d4eSeschrock 184599653d4eSeschrock /* 184699653d4eSeschrock * Add in 128x the snapnames zapobj size, since we will be moving 184799653d4eSeschrock * a bunch of snapnames to the promoted ds, and dirtying their 184899653d4eSeschrock * bonus buffers. 184999653d4eSeschrock */ 18501d452cf5Sahrens err = dsl_sync_task_do(ds->ds_dir->dd_pool, 18511d452cf5Sahrens dsl_dataset_promote_check, 18521d452cf5Sahrens dsl_dataset_promote_sync, ds, &pa, 2 + 2 * doi.doi_physical_blks); 185399653d4eSeschrock dsl_dataset_close(ds, DS_MODE_NONE, FTAG); 185499653d4eSeschrock return (err); 185599653d4eSeschrock } 1856