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 /* 2255434c77Sek * 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> 40cdf5b4caSmmusante #include <sys/zfs_ioctl.h> 41ecd6cf80Smarks #include <sys/spa.h> 42ecd6cf80Smarks #include <sys/sunddi.h> 43fa9e4066Sahrens 441d452cf5Sahrens static dsl_checkfunc_t dsl_dataset_destroy_begin_check; 451d452cf5Sahrens static dsl_syncfunc_t dsl_dataset_destroy_begin_sync; 461d452cf5Sahrens static dsl_checkfunc_t dsl_dataset_rollback_check; 471d452cf5Sahrens static dsl_syncfunc_t dsl_dataset_rollback_sync; 48a9799022Sck static dsl_syncfunc_t dsl_dataset_set_reservation_sync; 49e1930233Sbonwick 5055434c77Sek #define DS_REF_MAX (1ULL << 62) 51fa9e4066Sahrens 52fa9e4066Sahrens #define DSL_DEADLIST_BLOCKSIZE SPA_MAXBLOCKSIZE 53fa9e4066Sahrens 54fa9e4066Sahrens /* 55fa9e4066Sahrens * We use weighted reference counts to express the various forms of exclusion 56fa9e4066Sahrens * between different open modes. A STANDARD open is 1 point, an EXCLUSIVE open 5755434c77Sek * is DS_REF_MAX, and a PRIMARY open is little more than half of an EXCLUSIVE. 58fa9e4066Sahrens * This makes the exclusion logic simple: the total refcnt for all opens cannot 5955434c77Sek * exceed DS_REF_MAX. For example, EXCLUSIVE opens are exclusive because their 6055434c77Sek * weight (DS_REF_MAX) consumes the entire refcnt space. PRIMARY opens consume 61fa9e4066Sahrens * just over half of the refcnt space, so there can't be more than one, but it 62fa9e4066Sahrens * can peacefully coexist with any number of STANDARD opens. 63fa9e4066Sahrens */ 64fa9e4066Sahrens static uint64_t ds_refcnt_weight[DS_MODE_LEVELS] = { 6555434c77Sek 0, /* DS_MODE_NONE - invalid */ 6655434c77Sek 1, /* DS_MODE_STANDARD - unlimited number */ 6755434c77Sek (DS_REF_MAX >> 1) + 1, /* DS_MODE_PRIMARY - only one of these */ 6855434c77Sek DS_REF_MAX /* DS_MODE_EXCLUSIVE - no other opens */ 69fa9e4066Sahrens }; 70fa9e4066Sahrens 71a9799022Sck /* 72a9799022Sck * Figure out how much of this delta should be propogated to the dsl_dir 73a9799022Sck * layer. If there's a refreservation, that space has already been 74a9799022Sck * partially accounted for in our ancestors. 75a9799022Sck */ 76a9799022Sck static int64_t 77a9799022Sck parent_delta(dsl_dataset_t *ds, int64_t delta) 78a9799022Sck { 79a9799022Sck uint64_t old_bytes, new_bytes; 80a9799022Sck 81a9799022Sck if (ds->ds_reserved == 0) 82a9799022Sck return (delta); 83a9799022Sck 84a9799022Sck old_bytes = MAX(ds->ds_phys->ds_unique_bytes, ds->ds_reserved); 85a9799022Sck new_bytes = MAX(ds->ds_phys->ds_unique_bytes + delta, ds->ds_reserved); 86a9799022Sck 87a9799022Sck ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); 88a9799022Sck return (new_bytes - old_bytes); 89a9799022Sck } 90fa9e4066Sahrens 91fa9e4066Sahrens void 92fa9e4066Sahrens dsl_dataset_block_born(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) 93fa9e4066Sahrens { 9499653d4eSeschrock int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); 95fa9e4066Sahrens int compressed = BP_GET_PSIZE(bp); 96fa9e4066Sahrens int uncompressed = BP_GET_UCSIZE(bp); 97a9799022Sck int64_t delta; 98fa9e4066Sahrens 99fa9e4066Sahrens dprintf_bp(bp, "born, ds=%p\n", ds); 100fa9e4066Sahrens 101fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 102fa9e4066Sahrens /* It could have been compressed away to nothing */ 103fa9e4066Sahrens if (BP_IS_HOLE(bp)) 104fa9e4066Sahrens return; 105fa9e4066Sahrens ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); 106fa9e4066Sahrens ASSERT3U(BP_GET_TYPE(bp), <, DMU_OT_NUMTYPES); 107fa9e4066Sahrens if (ds == NULL) { 108fa9e4066Sahrens /* 109fa9e4066Sahrens * Account for the meta-objset space in its placeholder 110fa9e4066Sahrens * dsl_dir. 111fa9e4066Sahrens */ 112fa9e4066Sahrens ASSERT3U(compressed, ==, uncompressed); /* it's all metadata */ 113fa9e4066Sahrens dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, 114fa9e4066Sahrens used, compressed, uncompressed, tx); 115fa9e4066Sahrens dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); 116fa9e4066Sahrens return; 117fa9e4066Sahrens } 118fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 119fa9e4066Sahrens mutex_enter(&ds->ds_lock); 120a9799022Sck delta = parent_delta(ds, used); 121fa9e4066Sahrens ds->ds_phys->ds_used_bytes += used; 122fa9e4066Sahrens ds->ds_phys->ds_compressed_bytes += compressed; 123fa9e4066Sahrens ds->ds_phys->ds_uncompressed_bytes += uncompressed; 124fa9e4066Sahrens ds->ds_phys->ds_unique_bytes += used; 125fa9e4066Sahrens mutex_exit(&ds->ds_lock); 126a9799022Sck dsl_dir_diduse_space(ds->ds_dir, delta, compressed, uncompressed, tx); 127fa9e4066Sahrens } 128fa9e4066Sahrens 129fa9e4066Sahrens void 130c717a561Smaybee dsl_dataset_block_kill(dsl_dataset_t *ds, blkptr_t *bp, zio_t *pio, 131c717a561Smaybee dmu_tx_t *tx) 132fa9e4066Sahrens { 13399653d4eSeschrock int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); 134fa9e4066Sahrens int compressed = BP_GET_PSIZE(bp); 135fa9e4066Sahrens int uncompressed = BP_GET_UCSIZE(bp); 136fa9e4066Sahrens 137fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 138c717a561Smaybee /* No block pointer => nothing to free */ 139fa9e4066Sahrens if (BP_IS_HOLE(bp)) 140fa9e4066Sahrens return; 141fa9e4066Sahrens 142fa9e4066Sahrens ASSERT(used > 0); 143fa9e4066Sahrens if (ds == NULL) { 144c717a561Smaybee int err; 145fa9e4066Sahrens /* 146fa9e4066Sahrens * Account for the meta-objset space in its placeholder 147fa9e4066Sahrens * dataset. 148fa9e4066Sahrens */ 149c717a561Smaybee err = arc_free(pio, tx->tx_pool->dp_spa, 150c717a561Smaybee tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); 151c717a561Smaybee ASSERT(err == 0); 152fa9e4066Sahrens 153fa9e4066Sahrens dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, 154fa9e4066Sahrens -used, -compressed, -uncompressed, tx); 155fa9e4066Sahrens dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); 156fa9e4066Sahrens return; 157fa9e4066Sahrens } 158fa9e4066Sahrens ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); 159fa9e4066Sahrens 160fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 161fa9e4066Sahrens 162fa9e4066Sahrens if (bp->blk_birth > ds->ds_phys->ds_prev_snap_txg) { 163c717a561Smaybee int err; 164a9799022Sck int64_t delta; 165c717a561Smaybee 166fa9e4066Sahrens dprintf_bp(bp, "freeing: %s", ""); 167c717a561Smaybee err = arc_free(pio, tx->tx_pool->dp_spa, 168c717a561Smaybee tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); 169c717a561Smaybee ASSERT(err == 0); 170fa9e4066Sahrens 171fa9e4066Sahrens mutex_enter(&ds->ds_lock); 172a9799022Sck ASSERT(ds->ds_phys->ds_unique_bytes >= used || 173a9799022Sck !DS_UNIQUE_IS_ACCURATE(ds)); 174a9799022Sck delta = parent_delta(ds, -used); 175fa9e4066Sahrens ds->ds_phys->ds_unique_bytes -= used; 176fa9e4066Sahrens mutex_exit(&ds->ds_lock); 177fa9e4066Sahrens dsl_dir_diduse_space(ds->ds_dir, 178a9799022Sck delta, -compressed, -uncompressed, tx); 179fa9e4066Sahrens } else { 180fa9e4066Sahrens dprintf_bp(bp, "putting on dead list: %s", ""); 181ea8dc4b6Seschrock VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, bp, tx)); 182*a4611edeSahrens ASSERT3U(ds->ds_prev->ds_object, ==, 183*a4611edeSahrens ds->ds_phys->ds_prev_snap_obj); 184*a4611edeSahrens ASSERT(ds->ds_prev->ds_phys->ds_num_children > 0); 185fa9e4066Sahrens /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ 186*a4611edeSahrens if (ds->ds_prev->ds_phys->ds_next_snap_obj == 187*a4611edeSahrens ds->ds_object && bp->blk_birth > 188*a4611edeSahrens ds->ds_prev->ds_phys->ds_prev_snap_txg) { 189*a4611edeSahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 190*a4611edeSahrens mutex_enter(&ds->ds_prev->ds_lock); 191*a4611edeSahrens ds->ds_prev->ds_phys->ds_unique_bytes += used; 192*a4611edeSahrens mutex_exit(&ds->ds_prev->ds_lock); 193fa9e4066Sahrens } 194fa9e4066Sahrens } 195fa9e4066Sahrens mutex_enter(&ds->ds_lock); 196fa9e4066Sahrens ASSERT3U(ds->ds_phys->ds_used_bytes, >=, used); 197fa9e4066Sahrens ds->ds_phys->ds_used_bytes -= used; 198fa9e4066Sahrens ASSERT3U(ds->ds_phys->ds_compressed_bytes, >=, compressed); 199fa9e4066Sahrens ds->ds_phys->ds_compressed_bytes -= compressed; 200fa9e4066Sahrens ASSERT3U(ds->ds_phys->ds_uncompressed_bytes, >=, uncompressed); 201fa9e4066Sahrens ds->ds_phys->ds_uncompressed_bytes -= uncompressed; 202fa9e4066Sahrens mutex_exit(&ds->ds_lock); 203fa9e4066Sahrens } 204fa9e4066Sahrens 205ea8dc4b6Seschrock uint64_t 206ea8dc4b6Seschrock dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) 207fa9e4066Sahrens { 208a2eea2e1Sahrens uint64_t trysnap = 0; 209a2eea2e1Sahrens 210fa9e4066Sahrens if (ds == NULL) 211ea8dc4b6Seschrock return (0); 212fa9e4066Sahrens /* 213fa9e4066Sahrens * The snapshot creation could fail, but that would cause an 214fa9e4066Sahrens * incorrect FALSE return, which would only result in an 215fa9e4066Sahrens * overestimation of the amount of space that an operation would 216fa9e4066Sahrens * consume, which is OK. 217fa9e4066Sahrens * 218fa9e4066Sahrens * There's also a small window where we could miss a pending 219fa9e4066Sahrens * snapshot, because we could set the sync task in the quiescing 220fa9e4066Sahrens * phase. So this should only be used as a guess. 221fa9e4066Sahrens */ 222a2eea2e1Sahrens if (ds->ds_trysnap_txg > 223a2eea2e1Sahrens spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) 224a2eea2e1Sahrens trysnap = ds->ds_trysnap_txg; 225a2eea2e1Sahrens return (MAX(ds->ds_phys->ds_prev_snap_txg, trysnap)); 226ea8dc4b6Seschrock } 227ea8dc4b6Seschrock 228ea8dc4b6Seschrock int 229ea8dc4b6Seschrock dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth) 230ea8dc4b6Seschrock { 231ea8dc4b6Seschrock return (blk_birth > dsl_dataset_prev_snap_txg(ds)); 232fa9e4066Sahrens } 233fa9e4066Sahrens 234fa9e4066Sahrens /* ARGSUSED */ 235fa9e4066Sahrens static void 236fa9e4066Sahrens dsl_dataset_evict(dmu_buf_t *db, void *dsv) 237fa9e4066Sahrens { 238fa9e4066Sahrens dsl_dataset_t *ds = dsv; 239fa9e4066Sahrens 24055434c77Sek /* open_refcount == DS_REF_MAX when deleting */ 241fa9e4066Sahrens ASSERT(ds->ds_open_refcount == 0 || 24255434c77Sek ds->ds_open_refcount == DS_REF_MAX); 243fa9e4066Sahrens 244fa9e4066Sahrens dprintf_ds(ds, "evicting %s\n", ""); 245fa9e4066Sahrens 24691ebeef5Sahrens unique_remove(ds->ds_fsid_guid); 247fa9e4066Sahrens 248fa9e4066Sahrens if (ds->ds_user_ptr != NULL) 249fa9e4066Sahrens ds->ds_user_evict_func(ds, ds->ds_user_ptr); 250fa9e4066Sahrens 251fa9e4066Sahrens if (ds->ds_prev) { 252fa9e4066Sahrens dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); 253fa9e4066Sahrens ds->ds_prev = NULL; 254fa9e4066Sahrens } 255fa9e4066Sahrens 256fa9e4066Sahrens bplist_close(&ds->ds_deadlist); 257fa9e4066Sahrens dsl_dir_close(ds->ds_dir, ds); 258fa9e4066Sahrens 25991ebeef5Sahrens ASSERT(!list_link_active(&ds->ds_synced_link)); 260fa9e4066Sahrens 2615ad82045Snd mutex_destroy(&ds->ds_lock); 26291ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 2635ad82045Snd mutex_destroy(&ds->ds_deadlist.bpl_lock); 2645ad82045Snd 265fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 266fa9e4066Sahrens } 267fa9e4066Sahrens 268ea8dc4b6Seschrock static int 269fa9e4066Sahrens dsl_dataset_get_snapname(dsl_dataset_t *ds) 270fa9e4066Sahrens { 271fa9e4066Sahrens dsl_dataset_phys_t *headphys; 272fa9e4066Sahrens int err; 273fa9e4066Sahrens dmu_buf_t *headdbuf; 274fa9e4066Sahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 275fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 276fa9e4066Sahrens 277fa9e4066Sahrens if (ds->ds_snapname[0]) 278ea8dc4b6Seschrock return (0); 279fa9e4066Sahrens if (ds->ds_phys->ds_next_snap_obj == 0) 280ea8dc4b6Seschrock return (0); 281fa9e4066Sahrens 282ea8dc4b6Seschrock err = dmu_bonus_hold(mos, ds->ds_dir->dd_phys->dd_head_dataset_obj, 283ea8dc4b6Seschrock FTAG, &headdbuf); 284ea8dc4b6Seschrock if (err) 285ea8dc4b6Seschrock return (err); 286fa9e4066Sahrens headphys = headdbuf->db_data; 287fa9e4066Sahrens err = zap_value_search(dp->dp_meta_objset, 288e7437265Sahrens headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); 289ea8dc4b6Seschrock dmu_buf_rele(headdbuf, FTAG); 290ea8dc4b6Seschrock return (err); 291fa9e4066Sahrens } 292fa9e4066Sahrens 293ea8dc4b6Seschrock int 294fa9e4066Sahrens dsl_dataset_open_obj(dsl_pool_t *dp, uint64_t dsobj, const char *snapname, 295ea8dc4b6Seschrock int mode, void *tag, dsl_dataset_t **dsp) 296fa9e4066Sahrens { 297fa9e4066Sahrens uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; 298fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 299fa9e4066Sahrens dmu_buf_t *dbuf; 300fa9e4066Sahrens dsl_dataset_t *ds; 301ea8dc4b6Seschrock int err; 302fa9e4066Sahrens 303fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || 304fa9e4066Sahrens dsl_pool_sync_context(dp)); 305fa9e4066Sahrens 306ea8dc4b6Seschrock err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); 307ea8dc4b6Seschrock if (err) 308ea8dc4b6Seschrock return (err); 309fa9e4066Sahrens ds = dmu_buf_get_user(dbuf); 310fa9e4066Sahrens if (ds == NULL) { 311fa9e4066Sahrens dsl_dataset_t *winner; 312fa9e4066Sahrens 313fa9e4066Sahrens ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); 314fa9e4066Sahrens ds->ds_dbuf = dbuf; 315fa9e4066Sahrens ds->ds_object = dsobj; 316fa9e4066Sahrens ds->ds_phys = dbuf->db_data; 317fa9e4066Sahrens 3185ad82045Snd mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); 31991ebeef5Sahrens mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); 3205ad82045Snd mutex_init(&ds->ds_deadlist.bpl_lock, NULL, MUTEX_DEFAULT, 3215ad82045Snd NULL); 3225ad82045Snd 323ea8dc4b6Seschrock err = bplist_open(&ds->ds_deadlist, 324fa9e4066Sahrens mos, ds->ds_phys->ds_deadlist_obj); 325ea8dc4b6Seschrock if (err == 0) { 326ea8dc4b6Seschrock err = dsl_dir_open_obj(dp, 327ea8dc4b6Seschrock ds->ds_phys->ds_dir_obj, NULL, ds, &ds->ds_dir); 328ea8dc4b6Seschrock } 329ea8dc4b6Seschrock if (err) { 330ea8dc4b6Seschrock /* 331ea8dc4b6Seschrock * we don't really need to close the blist if we 332ea8dc4b6Seschrock * just opened it. 333ea8dc4b6Seschrock */ 3345ad82045Snd mutex_destroy(&ds->ds_lock); 33591ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 3365ad82045Snd mutex_destroy(&ds->ds_deadlist.bpl_lock); 337ea8dc4b6Seschrock kmem_free(ds, sizeof (dsl_dataset_t)); 338ea8dc4b6Seschrock dmu_buf_rele(dbuf, tag); 339ea8dc4b6Seschrock return (err); 340ea8dc4b6Seschrock } 341fa9e4066Sahrens 342fa9e4066Sahrens if (ds->ds_dir->dd_phys->dd_head_dataset_obj == dsobj) { 343fa9e4066Sahrens ds->ds_snapname[0] = '\0'; 344fa9e4066Sahrens if (ds->ds_phys->ds_prev_snap_obj) { 345ea8dc4b6Seschrock err = dsl_dataset_open_obj(dp, 346fa9e4066Sahrens ds->ds_phys->ds_prev_snap_obj, NULL, 347ea8dc4b6Seschrock DS_MODE_NONE, ds, &ds->ds_prev); 348fa9e4066Sahrens } 349fa9e4066Sahrens } else { 350fa9e4066Sahrens if (snapname) { 351fa9e4066Sahrens #ifdef ZFS_DEBUG 352fa9e4066Sahrens dsl_dataset_phys_t *headphys; 353ea8dc4b6Seschrock dmu_buf_t *headdbuf; 354ea8dc4b6Seschrock err = dmu_bonus_hold(mos, 355ea8dc4b6Seschrock ds->ds_dir->dd_phys->dd_head_dataset_obj, 356ea8dc4b6Seschrock FTAG, &headdbuf); 357ea8dc4b6Seschrock if (err == 0) { 358ea8dc4b6Seschrock headphys = headdbuf->db_data; 359ea8dc4b6Seschrock uint64_t foundobj; 360ea8dc4b6Seschrock err = zap_lookup(dp->dp_meta_objset, 361ea8dc4b6Seschrock headphys->ds_snapnames_zapobj, 362ea8dc4b6Seschrock snapname, sizeof (foundobj), 1, 363ea8dc4b6Seschrock &foundobj); 364ea8dc4b6Seschrock ASSERT3U(foundobj, ==, dsobj); 365ea8dc4b6Seschrock dmu_buf_rele(headdbuf, FTAG); 366ea8dc4b6Seschrock } 367fa9e4066Sahrens #endif 368fa9e4066Sahrens (void) strcat(ds->ds_snapname, snapname); 369fa9e4066Sahrens } else if (zfs_flags & ZFS_DEBUG_SNAPNAMES) { 370ea8dc4b6Seschrock err = dsl_dataset_get_snapname(ds); 371fa9e4066Sahrens } 372fa9e4066Sahrens } 373fa9e4066Sahrens 374cb625fb5Sck if (!dsl_dataset_is_snapshot(ds)) { 37527345066Sck /* 37627345066Sck * In sync context, we're called with either no lock 37727345066Sck * or with the write lock. If we're not syncing, 37827345066Sck * we're always called with the read lock held. 37927345066Sck */ 380cb625fb5Sck boolean_t need_lock = 38127345066Sck !RW_WRITE_HELD(&dp->dp_config_rwlock) && 38227345066Sck dsl_pool_sync_context(dp); 383cb625fb5Sck 384cb625fb5Sck if (need_lock) 385cb625fb5Sck rw_enter(&dp->dp_config_rwlock, RW_READER); 386cb625fb5Sck 387cb625fb5Sck err = dsl_prop_get_ds_locked(ds->ds_dir, 388cb625fb5Sck "refreservation", sizeof (uint64_t), 1, 389cb625fb5Sck &ds->ds_reserved, NULL); 390cb625fb5Sck if (err == 0) { 391cb625fb5Sck err = dsl_prop_get_ds_locked(ds->ds_dir, 392cb625fb5Sck "refquota", sizeof (uint64_t), 1, 393cb625fb5Sck &ds->ds_quota, NULL); 394cb625fb5Sck } 395cb625fb5Sck 396cb625fb5Sck if (need_lock) 397cb625fb5Sck rw_exit(&dp->dp_config_rwlock); 398cb625fb5Sck } else { 399cb625fb5Sck ds->ds_reserved = ds->ds_quota = 0; 400cb625fb5Sck } 401cb625fb5Sck 402ea8dc4b6Seschrock if (err == 0) { 403ea8dc4b6Seschrock winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys, 404ea8dc4b6Seschrock dsl_dataset_evict); 405ea8dc4b6Seschrock } 406ea8dc4b6Seschrock if (err || winner) { 407fa9e4066Sahrens bplist_close(&ds->ds_deadlist); 408fa9e4066Sahrens if (ds->ds_prev) { 409fa9e4066Sahrens dsl_dataset_close(ds->ds_prev, 410fa9e4066Sahrens DS_MODE_NONE, ds); 411fa9e4066Sahrens } 412fa9e4066Sahrens dsl_dir_close(ds->ds_dir, ds); 4135ad82045Snd mutex_destroy(&ds->ds_lock); 41491ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 4155ad82045Snd mutex_destroy(&ds->ds_deadlist.bpl_lock); 416fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 417ea8dc4b6Seschrock if (err) { 418ea8dc4b6Seschrock dmu_buf_rele(dbuf, tag); 419ea8dc4b6Seschrock return (err); 420ea8dc4b6Seschrock } 421fa9e4066Sahrens ds = winner; 422fa9e4066Sahrens } else { 42391ebeef5Sahrens ds->ds_fsid_guid = 424fa9e4066Sahrens unique_insert(ds->ds_phys->ds_fsid_guid); 425fa9e4066Sahrens } 426fa9e4066Sahrens } 427fa9e4066Sahrens ASSERT3P(ds->ds_dbuf, ==, dbuf); 428fa9e4066Sahrens ASSERT3P(ds->ds_phys, ==, dbuf->db_data); 429fa9e4066Sahrens 430fa9e4066Sahrens mutex_enter(&ds->ds_lock); 431fa9e4066Sahrens if ((DS_MODE_LEVEL(mode) == DS_MODE_PRIMARY && 43299653d4eSeschrock (ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) && 43399653d4eSeschrock !DS_MODE_IS_INCONSISTENT(mode)) || 43455434c77Sek (ds->ds_open_refcount + weight > DS_REF_MAX)) { 435fa9e4066Sahrens mutex_exit(&ds->ds_lock); 436fa9e4066Sahrens dsl_dataset_close(ds, DS_MODE_NONE, tag); 437ea8dc4b6Seschrock return (EBUSY); 438fa9e4066Sahrens } 439fa9e4066Sahrens ds->ds_open_refcount += weight; 440fa9e4066Sahrens mutex_exit(&ds->ds_lock); 441fa9e4066Sahrens 442ea8dc4b6Seschrock *dsp = ds; 443ea8dc4b6Seschrock return (0); 444fa9e4066Sahrens } 445fa9e4066Sahrens 446fa9e4066Sahrens int 447fa9e4066Sahrens dsl_dataset_open_spa(spa_t *spa, const char *name, int mode, 448fa9e4066Sahrens void *tag, dsl_dataset_t **dsp) 449fa9e4066Sahrens { 450fa9e4066Sahrens dsl_dir_t *dd; 451fa9e4066Sahrens dsl_pool_t *dp; 452fa9e4066Sahrens const char *tail; 453fa9e4066Sahrens uint64_t obj; 454fa9e4066Sahrens dsl_dataset_t *ds = NULL; 455fa9e4066Sahrens int err = 0; 456fa9e4066Sahrens 457ea8dc4b6Seschrock err = dsl_dir_open_spa(spa, name, FTAG, &dd, &tail); 458ea8dc4b6Seschrock if (err) 459ea8dc4b6Seschrock return (err); 460fa9e4066Sahrens 461fa9e4066Sahrens dp = dd->dd_pool; 462fa9e4066Sahrens obj = dd->dd_phys->dd_head_dataset_obj; 463fa9e4066Sahrens rw_enter(&dp->dp_config_rwlock, RW_READER); 464fa9e4066Sahrens if (obj == 0) { 465fa9e4066Sahrens /* A dataset with no associated objset */ 466fa9e4066Sahrens err = ENOENT; 467fa9e4066Sahrens goto out; 468fa9e4066Sahrens } 469fa9e4066Sahrens 470fa9e4066Sahrens if (tail != NULL) { 471fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 472fa9e4066Sahrens 473ea8dc4b6Seschrock err = dsl_dataset_open_obj(dp, obj, NULL, 474ea8dc4b6Seschrock DS_MODE_NONE, tag, &ds); 475ea8dc4b6Seschrock if (err) 476ea8dc4b6Seschrock goto out; 477fa9e4066Sahrens obj = ds->ds_phys->ds_snapnames_zapobj; 478fa9e4066Sahrens dsl_dataset_close(ds, DS_MODE_NONE, tag); 479fa9e4066Sahrens ds = NULL; 480fa9e4066Sahrens 481fa9e4066Sahrens if (tail[0] != '@') { 482fa9e4066Sahrens err = ENOENT; 483fa9e4066Sahrens goto out; 484fa9e4066Sahrens } 485fa9e4066Sahrens tail++; 486fa9e4066Sahrens 487fa9e4066Sahrens /* Look for a snapshot */ 488fa9e4066Sahrens if (!DS_MODE_IS_READONLY(mode)) { 489fa9e4066Sahrens err = EROFS; 490fa9e4066Sahrens goto out; 491fa9e4066Sahrens } 492fa9e4066Sahrens dprintf("looking for snapshot '%s'\n", tail); 493fa9e4066Sahrens err = zap_lookup(mos, obj, tail, 8, 1, &obj); 494fa9e4066Sahrens if (err) 495fa9e4066Sahrens goto out; 496fa9e4066Sahrens } 497ea8dc4b6Seschrock err = dsl_dataset_open_obj(dp, obj, tail, mode, tag, &ds); 498fa9e4066Sahrens 499fa9e4066Sahrens out: 500fa9e4066Sahrens rw_exit(&dp->dp_config_rwlock); 501fa9e4066Sahrens dsl_dir_close(dd, FTAG); 502fa9e4066Sahrens 503fa9e4066Sahrens ASSERT3U((err == 0), ==, (ds != NULL)); 504fa9e4066Sahrens /* ASSERT(ds == NULL || strcmp(name, ds->ds_name) == 0); */ 505fa9e4066Sahrens 506fa9e4066Sahrens *dsp = ds; 507fa9e4066Sahrens return (err); 508fa9e4066Sahrens } 509fa9e4066Sahrens 510fa9e4066Sahrens int 511fa9e4066Sahrens dsl_dataset_open(const char *name, int mode, void *tag, dsl_dataset_t **dsp) 512fa9e4066Sahrens { 513fa9e4066Sahrens return (dsl_dataset_open_spa(NULL, name, mode, tag, dsp)); 514fa9e4066Sahrens } 515fa9e4066Sahrens 516fa9e4066Sahrens void 517fa9e4066Sahrens dsl_dataset_name(dsl_dataset_t *ds, char *name) 518fa9e4066Sahrens { 519fa9e4066Sahrens if (ds == NULL) { 520fa9e4066Sahrens (void) strcpy(name, "mos"); 521fa9e4066Sahrens } else { 522fa9e4066Sahrens dsl_dir_name(ds->ds_dir, name); 523ea8dc4b6Seschrock VERIFY(0 == dsl_dataset_get_snapname(ds)); 524fa9e4066Sahrens if (ds->ds_snapname[0]) { 525fa9e4066Sahrens (void) strcat(name, "@"); 526fa9e4066Sahrens if (!MUTEX_HELD(&ds->ds_lock)) { 527fa9e4066Sahrens /* 528fa9e4066Sahrens * We use a "recursive" mutex so that we 529fa9e4066Sahrens * can call dprintf_ds() with ds_lock held. 530fa9e4066Sahrens */ 531fa9e4066Sahrens mutex_enter(&ds->ds_lock); 532fa9e4066Sahrens (void) strcat(name, ds->ds_snapname); 533fa9e4066Sahrens mutex_exit(&ds->ds_lock); 534fa9e4066Sahrens } else { 535fa9e4066Sahrens (void) strcat(name, ds->ds_snapname); 536fa9e4066Sahrens } 537fa9e4066Sahrens } 538fa9e4066Sahrens } 539fa9e4066Sahrens } 540fa9e4066Sahrens 541b7661cccSmmusante static int 542b7661cccSmmusante dsl_dataset_namelen(dsl_dataset_t *ds) 543b7661cccSmmusante { 544b7661cccSmmusante int result; 545b7661cccSmmusante 546b7661cccSmmusante if (ds == NULL) { 547b7661cccSmmusante result = 3; /* "mos" */ 548b7661cccSmmusante } else { 549b7661cccSmmusante result = dsl_dir_namelen(ds->ds_dir); 550b7661cccSmmusante VERIFY(0 == dsl_dataset_get_snapname(ds)); 551b7661cccSmmusante if (ds->ds_snapname[0]) { 552b7661cccSmmusante ++result; /* adding one for the @-sign */ 553b7661cccSmmusante if (!MUTEX_HELD(&ds->ds_lock)) { 554b7661cccSmmusante /* see dsl_datset_name */ 555b7661cccSmmusante mutex_enter(&ds->ds_lock); 556b7661cccSmmusante result += strlen(ds->ds_snapname); 557b7661cccSmmusante mutex_exit(&ds->ds_lock); 558b7661cccSmmusante } else { 559b7661cccSmmusante result += strlen(ds->ds_snapname); 560b7661cccSmmusante } 561b7661cccSmmusante } 562b7661cccSmmusante } 563b7661cccSmmusante 564b7661cccSmmusante return (result); 565b7661cccSmmusante } 566b7661cccSmmusante 567fa9e4066Sahrens void 568fa9e4066Sahrens dsl_dataset_close(dsl_dataset_t *ds, int mode, void *tag) 569fa9e4066Sahrens { 570fa9e4066Sahrens uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; 571fa9e4066Sahrens mutex_enter(&ds->ds_lock); 572fa9e4066Sahrens ASSERT3U(ds->ds_open_refcount, >=, weight); 573fa9e4066Sahrens ds->ds_open_refcount -= weight; 574fa9e4066Sahrens dprintf_ds(ds, "closing mode %u refcount now 0x%llx\n", 575fa9e4066Sahrens mode, ds->ds_open_refcount); 576fa9e4066Sahrens mutex_exit(&ds->ds_lock); 577fa9e4066Sahrens 578ea8dc4b6Seschrock dmu_buf_rele(ds->ds_dbuf, tag); 579fa9e4066Sahrens } 580fa9e4066Sahrens 5813cb34c60Sahrens void 5823cb34c60Sahrens dsl_dataset_downgrade(dsl_dataset_t *ds, int oldmode, int newmode) 5833cb34c60Sahrens { 5843cb34c60Sahrens uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; 5853cb34c60Sahrens uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; 5863cb34c60Sahrens mutex_enter(&ds->ds_lock); 5873cb34c60Sahrens ASSERT3U(ds->ds_open_refcount, >=, oldweight); 5883cb34c60Sahrens ASSERT3U(oldweight, >=, newweight); 5893cb34c60Sahrens ds->ds_open_refcount -= oldweight; 5903cb34c60Sahrens ds->ds_open_refcount += newweight; 5913cb34c60Sahrens mutex_exit(&ds->ds_lock); 5923cb34c60Sahrens } 5933cb34c60Sahrens 5943cb34c60Sahrens boolean_t 5953cb34c60Sahrens dsl_dataset_tryupgrade(dsl_dataset_t *ds, int oldmode, int newmode) 5963cb34c60Sahrens { 5973cb34c60Sahrens boolean_t rv; 5983cb34c60Sahrens uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; 5993cb34c60Sahrens uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; 6003cb34c60Sahrens mutex_enter(&ds->ds_lock); 6013cb34c60Sahrens ASSERT3U(ds->ds_open_refcount, >=, oldweight); 6023cb34c60Sahrens ASSERT3U(newweight, >=, oldweight); 6033cb34c60Sahrens if (ds->ds_open_refcount - oldweight + newweight > DS_REF_MAX) { 6043cb34c60Sahrens rv = B_FALSE; 6053cb34c60Sahrens } else { 6063cb34c60Sahrens ds->ds_open_refcount -= oldweight; 6073cb34c60Sahrens ds->ds_open_refcount += newweight; 6083cb34c60Sahrens rv = B_TRUE; 6093cb34c60Sahrens } 6103cb34c60Sahrens mutex_exit(&ds->ds_lock); 6113cb34c60Sahrens return (rv); 6123cb34c60Sahrens } 6133cb34c60Sahrens 614fa9e4066Sahrens void 615fa9e4066Sahrens dsl_dataset_create_root(dsl_pool_t *dp, uint64_t *ddobjp, dmu_tx_t *tx) 616fa9e4066Sahrens { 617fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 618fa9e4066Sahrens dmu_buf_t *dbuf; 619fa9e4066Sahrens dsl_dataset_phys_t *dsphys; 620fa9e4066Sahrens dsl_dataset_t *ds; 621fa9e4066Sahrens uint64_t dsobj; 622fa9e4066Sahrens dsl_dir_t *dd; 623fa9e4066Sahrens 624fa9e4066Sahrens dsl_dir_create_root(mos, ddobjp, tx); 625ea8dc4b6Seschrock VERIFY(0 == dsl_dir_open_obj(dp, *ddobjp, NULL, FTAG, &dd)); 626fa9e4066Sahrens 6271649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 6281649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 629ea8dc4b6Seschrock VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 630fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 631fa9e4066Sahrens dsphys = dbuf->db_data; 632fa9e4066Sahrens dsphys->ds_dir_obj = dd->dd_object; 633fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 634fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 635fa9e4066Sahrens sizeof (dsphys->ds_guid)); 636fa9e4066Sahrens dsphys->ds_snapnames_zapobj = 63787e5029aSahrens zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); 638fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 639fa9e4066Sahrens dsphys->ds_creation_txg = tx->tx_txg; 640fa9e4066Sahrens dsphys->ds_deadlist_obj = 641fa9e4066Sahrens bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); 642a9799022Sck if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) 643a9799022Sck dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 644ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 645fa9e4066Sahrens 646fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 647fa9e4066Sahrens dd->dd_phys->dd_head_dataset_obj = dsobj; 648fa9e4066Sahrens dsl_dir_close(dd, FTAG); 649fa9e4066Sahrens 650ea8dc4b6Seschrock VERIFY(0 == 651ea8dc4b6Seschrock dsl_dataset_open_obj(dp, dsobj, NULL, DS_MODE_NONE, FTAG, &ds)); 652c717a561Smaybee (void) dmu_objset_create_impl(dp->dp_spa, ds, 653c717a561Smaybee &ds->ds_phys->ds_bp, DMU_OST_ZFS, tx); 654fa9e4066Sahrens dsl_dataset_close(ds, DS_MODE_NONE, FTAG); 655fa9e4066Sahrens } 656fa9e4066Sahrens 6571d452cf5Sahrens uint64_t 6583cb34c60Sahrens dsl_dataset_create_sync_impl(dsl_dir_t *dd, dsl_dataset_t *origin, dmu_tx_t *tx) 659fa9e4066Sahrens { 6603cb34c60Sahrens dsl_pool_t *dp = dd->dd_pool; 661fa9e4066Sahrens dmu_buf_t *dbuf; 662fa9e4066Sahrens dsl_dataset_phys_t *dsphys; 6633cb34c60Sahrens uint64_t dsobj; 664fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 665fa9e4066Sahrens 6663cb34c60Sahrens ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); 6673cb34c60Sahrens ASSERT(origin == NULL || origin->ds_phys->ds_num_children > 0); 668fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 6693cb34c60Sahrens ASSERT(dd->dd_phys->dd_head_dataset_obj == 0); 670fa9e4066Sahrens 6711649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 6721649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 673ea8dc4b6Seschrock VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 674fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 675fa9e4066Sahrens dsphys = dbuf->db_data; 676fa9e4066Sahrens dsphys->ds_dir_obj = dd->dd_object; 677fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 678fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 679fa9e4066Sahrens sizeof (dsphys->ds_guid)); 680fa9e4066Sahrens dsphys->ds_snapnames_zapobj = 68187e5029aSahrens zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); 682fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 683fa9e4066Sahrens dsphys->ds_creation_txg = tx->tx_txg; 684fa9e4066Sahrens dsphys->ds_deadlist_obj = 685fa9e4066Sahrens bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); 686a9799022Sck if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) 687a9799022Sck dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 688a9799022Sck 6893cb34c60Sahrens if (origin) { 6903cb34c60Sahrens dsphys->ds_prev_snap_obj = origin->ds_object; 691fa9e4066Sahrens dsphys->ds_prev_snap_txg = 6923cb34c60Sahrens origin->ds_phys->ds_creation_txg; 693fa9e4066Sahrens dsphys->ds_used_bytes = 6943cb34c60Sahrens origin->ds_phys->ds_used_bytes; 695fa9e4066Sahrens dsphys->ds_compressed_bytes = 6963cb34c60Sahrens origin->ds_phys->ds_compressed_bytes; 697fa9e4066Sahrens dsphys->ds_uncompressed_bytes = 6983cb34c60Sahrens origin->ds_phys->ds_uncompressed_bytes; 6993cb34c60Sahrens dsphys->ds_bp = origin->ds_phys->ds_bp; 700fa9e4066Sahrens 7013cb34c60Sahrens dmu_buf_will_dirty(origin->ds_dbuf, tx); 7023cb34c60Sahrens origin->ds_phys->ds_num_children++; 703fa9e4066Sahrens 704fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 7053cb34c60Sahrens dd->dd_phys->dd_origin_obj = origin->ds_object; 706fa9e4066Sahrens } 707ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 708fa9e4066Sahrens 709fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 710fa9e4066Sahrens dd->dd_phys->dd_head_dataset_obj = dsobj; 7113cb34c60Sahrens 7123cb34c60Sahrens return (dsobj); 7133cb34c60Sahrens } 7143cb34c60Sahrens 7153cb34c60Sahrens uint64_t 7163cb34c60Sahrens dsl_dataset_create_sync(dsl_dir_t *pdd, 7173cb34c60Sahrens const char *lastname, dsl_dataset_t *origin, cred_t *cr, dmu_tx_t *tx) 7183cb34c60Sahrens { 7193cb34c60Sahrens dsl_pool_t *dp = pdd->dd_pool; 7203cb34c60Sahrens uint64_t dsobj, ddobj; 7213cb34c60Sahrens dsl_dir_t *dd; 7223cb34c60Sahrens 7233cb34c60Sahrens ASSERT(lastname[0] != '@'); 7243cb34c60Sahrens 7253cb34c60Sahrens ddobj = dsl_dir_create_sync(pdd, lastname, tx); 7263cb34c60Sahrens VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd)); 7273cb34c60Sahrens 7283cb34c60Sahrens dsobj = dsl_dataset_create_sync_impl(dd, origin, tx); 7293cb34c60Sahrens 7303cb34c60Sahrens dsl_deleg_set_create_perms(dd, tx, cr); 7313cb34c60Sahrens 732fa9e4066Sahrens dsl_dir_close(dd, FTAG); 733fa9e4066Sahrens 7341d452cf5Sahrens return (dsobj); 735fa9e4066Sahrens } 736fa9e4066Sahrens 7371d452cf5Sahrens struct destroyarg { 7381d452cf5Sahrens dsl_sync_task_group_t *dstg; 7391d452cf5Sahrens char *snapname; 7401d452cf5Sahrens char *failed; 7411d452cf5Sahrens }; 7421d452cf5Sahrens 7431d452cf5Sahrens static int 7441d452cf5Sahrens dsl_snapshot_destroy_one(char *name, void *arg) 745fa9e4066Sahrens { 7461d452cf5Sahrens struct destroyarg *da = arg; 7471d452cf5Sahrens dsl_dataset_t *ds; 7481d452cf5Sahrens char *cp; 749fa9e4066Sahrens int err; 750fa9e4066Sahrens 7511d452cf5Sahrens (void) strcat(name, "@"); 7521d452cf5Sahrens (void) strcat(name, da->snapname); 7531d452cf5Sahrens err = dsl_dataset_open(name, 7541d452cf5Sahrens DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, 755cdf5b4caSmmusante da->dstg, &ds); 7561d452cf5Sahrens cp = strchr(name, '@'); 7571d452cf5Sahrens *cp = '\0'; 7581d452cf5Sahrens if (err == ENOENT) 7591d452cf5Sahrens return (0); 7601d452cf5Sahrens if (err) { 7611d452cf5Sahrens (void) strcpy(da->failed, name); 762ea8dc4b6Seschrock return (err); 7631d452cf5Sahrens } 764fa9e4066Sahrens 7651d452cf5Sahrens dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check, 766cdf5b4caSmmusante dsl_dataset_destroy_sync, ds, da->dstg, 0); 7671d452cf5Sahrens return (0); 7681d452cf5Sahrens } 76931fd60d3Sahrens 7701d452cf5Sahrens /* 7711d452cf5Sahrens * Destroy 'snapname' in all descendants of 'fsname'. 7721d452cf5Sahrens */ 7731d452cf5Sahrens #pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy 7741d452cf5Sahrens int 7751d452cf5Sahrens dsl_snapshots_destroy(char *fsname, char *snapname) 7761d452cf5Sahrens { 7771d452cf5Sahrens int err; 7781d452cf5Sahrens struct destroyarg da; 7791d452cf5Sahrens dsl_sync_task_t *dst; 7801d452cf5Sahrens spa_t *spa; 7811d452cf5Sahrens 78240feaa91Sahrens err = spa_open(fsname, &spa, FTAG); 7831d452cf5Sahrens if (err) 7841d452cf5Sahrens return (err); 7851d452cf5Sahrens da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); 7861d452cf5Sahrens da.snapname = snapname; 7871d452cf5Sahrens da.failed = fsname; 7881d452cf5Sahrens 7891d452cf5Sahrens err = dmu_objset_find(fsname, 7900b69c2f0Sahrens dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN); 7911d452cf5Sahrens 7921d452cf5Sahrens if (err == 0) 7931d452cf5Sahrens err = dsl_sync_task_group_wait(da.dstg); 7941d452cf5Sahrens 7951d452cf5Sahrens for (dst = list_head(&da.dstg->dstg_tasks); dst; 7961d452cf5Sahrens dst = list_next(&da.dstg->dstg_tasks, dst)) { 7971d452cf5Sahrens dsl_dataset_t *ds = dst->dst_arg1; 7981d452cf5Sahrens if (dst->dst_err) { 7991d452cf5Sahrens dsl_dataset_name(ds, fsname); 80040feaa91Sahrens *strchr(fsname, '@') = '\0'; 801e1930233Sbonwick } 802fa9e4066Sahrens /* 8031d452cf5Sahrens * If it was successful, destroy_sync would have 8041d452cf5Sahrens * closed the ds 805fa9e4066Sahrens */ 806ea8dc4b6Seschrock if (err) 807cdf5b4caSmmusante dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, da.dstg); 808fa9e4066Sahrens } 809fa9e4066Sahrens 8101d452cf5Sahrens dsl_sync_task_group_destroy(da.dstg); 8111d452cf5Sahrens spa_close(spa, FTAG); 812fa9e4066Sahrens return (err); 813fa9e4066Sahrens } 814fa9e4066Sahrens 8153cb34c60Sahrens /* 8163cb34c60Sahrens * ds must be opened EXCLUSIVE or PRIMARY. on return (whether 8173cb34c60Sahrens * successful or not), ds will be closed and caller can no longer 8183cb34c60Sahrens * dereference it. 8193cb34c60Sahrens */ 820fa9e4066Sahrens int 8213cb34c60Sahrens dsl_dataset_destroy(dsl_dataset_t *ds, void *tag) 822fa9e4066Sahrens { 823fa9e4066Sahrens int err; 8241d452cf5Sahrens dsl_sync_task_group_t *dstg; 8251d452cf5Sahrens objset_t *os; 826fa9e4066Sahrens dsl_dir_t *dd; 8271d452cf5Sahrens uint64_t obj; 8281d452cf5Sahrens 8293cb34c60Sahrens if (ds->ds_open_refcount != DS_REF_MAX) { 8303cb34c60Sahrens if (dsl_dataset_tryupgrade(ds, DS_MODE_PRIMARY, 8313cb34c60Sahrens DS_MODE_EXCLUSIVE) == 0) { 8323cb34c60Sahrens dsl_dataset_close(ds, DS_MODE_PRIMARY, tag); 8333cb34c60Sahrens return (EBUSY); 8343cb34c60Sahrens } 8353cb34c60Sahrens } 8363cb34c60Sahrens 8373cb34c60Sahrens if (dsl_dataset_is_snapshot(ds)) { 8381d452cf5Sahrens /* Destroying a snapshot is simpler */ 8391d452cf5Sahrens err = dsl_sync_task_do(ds->ds_dir->dd_pool, 8401d452cf5Sahrens dsl_dataset_destroy_check, dsl_dataset_destroy_sync, 8413cb34c60Sahrens ds, tag, 0); 8423cb34c60Sahrens goto out; 8431d452cf5Sahrens } 844fa9e4066Sahrens 8451d452cf5Sahrens dd = ds->ds_dir; 846fa9e4066Sahrens 8471d452cf5Sahrens /* 8481d452cf5Sahrens * Check for errors and mark this ds as inconsistent, in 8491d452cf5Sahrens * case we crash while freeing the objects. 8501d452cf5Sahrens */ 8511d452cf5Sahrens err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check, 8521d452cf5Sahrens dsl_dataset_destroy_begin_sync, ds, NULL, 0); 8533cb34c60Sahrens if (err) 8543cb34c60Sahrens goto out; 8553cb34c60Sahrens 8563cb34c60Sahrens err = dmu_objset_open_ds(ds, DMU_OST_ANY, &os); 8573cb34c60Sahrens if (err) 8583cb34c60Sahrens goto out; 859fa9e4066Sahrens 8601d452cf5Sahrens /* 8611d452cf5Sahrens * remove the objects in open context, so that we won't 8621d452cf5Sahrens * have too much to do in syncing context. 8631d452cf5Sahrens */ 8646754306eSahrens for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 8656754306eSahrens ds->ds_phys->ds_prev_snap_txg)) { 8661d452cf5Sahrens dmu_tx_t *tx = dmu_tx_create(os); 8671d452cf5Sahrens dmu_tx_hold_free(tx, obj, 0, DMU_OBJECT_END); 8681d452cf5Sahrens dmu_tx_hold_bonus(tx, obj); 8691d452cf5Sahrens err = dmu_tx_assign(tx, TXG_WAIT); 8701d452cf5Sahrens if (err) { 8711d452cf5Sahrens /* 8721d452cf5Sahrens * Perhaps there is not enough disk 8731d452cf5Sahrens * space. Just deal with it from 8741d452cf5Sahrens * dsl_dataset_destroy_sync(). 8751d452cf5Sahrens */ 8761d452cf5Sahrens dmu_tx_abort(tx); 8771d452cf5Sahrens continue; 8781d452cf5Sahrens } 8791d452cf5Sahrens VERIFY(0 == dmu_object_free(os, obj, tx)); 8801d452cf5Sahrens dmu_tx_commit(tx); 8811d452cf5Sahrens } 8821d452cf5Sahrens /* Make sure it's not dirty before we finish destroying it. */ 8831d452cf5Sahrens txg_wait_synced(dd->dd_pool, 0); 8841d452cf5Sahrens 8851d452cf5Sahrens dmu_objset_close(os); 8861d452cf5Sahrens if (err != ESRCH) 8873cb34c60Sahrens goto out; 8881d452cf5Sahrens 8893cb34c60Sahrens if (ds->ds_user_ptr) { 8903cb34c60Sahrens ds->ds_user_evict_func(ds, ds->ds_user_ptr); 8913cb34c60Sahrens ds->ds_user_ptr = NULL; 8921d452cf5Sahrens } 8931d452cf5Sahrens 8943cb34c60Sahrens rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); 8953cb34c60Sahrens err = dsl_dir_open_obj(dd->dd_pool, dd->dd_object, NULL, FTAG, &dd); 8963cb34c60Sahrens rw_exit(&dd->dd_pool->dp_config_rwlock); 8973cb34c60Sahrens 8983cb34c60Sahrens if (err) 8993cb34c60Sahrens goto out; 9003cb34c60Sahrens 9011d452cf5Sahrens /* 9021d452cf5Sahrens * Blow away the dsl_dir + head dataset. 9031d452cf5Sahrens */ 9041d452cf5Sahrens dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool); 9051d452cf5Sahrens dsl_sync_task_create(dstg, dsl_dataset_destroy_check, 9063cb34c60Sahrens dsl_dataset_destroy_sync, ds, tag, 0); 9071d452cf5Sahrens dsl_sync_task_create(dstg, dsl_dir_destroy_check, 9081d452cf5Sahrens dsl_dir_destroy_sync, dd, FTAG, 0); 9091d452cf5Sahrens err = dsl_sync_task_group_wait(dstg); 9101d452cf5Sahrens dsl_sync_task_group_destroy(dstg); 9111d452cf5Sahrens /* if it is successful, *destroy_sync will close the ds+dd */ 9123cb34c60Sahrens if (err) 9131d452cf5Sahrens dsl_dir_close(dd, FTAG); 9143cb34c60Sahrens out: 9153cb34c60Sahrens if (err) 9163cb34c60Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); 917fa9e4066Sahrens return (err); 918fa9e4066Sahrens } 919fa9e4066Sahrens 9201d452cf5Sahrens int 9213cb34c60Sahrens dsl_dataset_rollback(dsl_dataset_t *ds, dmu_objset_type_t ost) 9221d452cf5Sahrens { 92355434c77Sek ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); 9243cb34c60Sahrens 9251d452cf5Sahrens return (dsl_sync_task_do(ds->ds_dir->dd_pool, 9261d452cf5Sahrens dsl_dataset_rollback_check, dsl_dataset_rollback_sync, 9273cb34c60Sahrens ds, &ost, 0)); 9281d452cf5Sahrens } 9291d452cf5Sahrens 930fa9e4066Sahrens void * 931fa9e4066Sahrens dsl_dataset_set_user_ptr(dsl_dataset_t *ds, 932fa9e4066Sahrens void *p, dsl_dataset_evict_func_t func) 933fa9e4066Sahrens { 934fa9e4066Sahrens void *old; 935fa9e4066Sahrens 936fa9e4066Sahrens mutex_enter(&ds->ds_lock); 937fa9e4066Sahrens old = ds->ds_user_ptr; 938fa9e4066Sahrens if (old == NULL) { 939fa9e4066Sahrens ds->ds_user_ptr = p; 940fa9e4066Sahrens ds->ds_user_evict_func = func; 941fa9e4066Sahrens } 942fa9e4066Sahrens mutex_exit(&ds->ds_lock); 943fa9e4066Sahrens return (old); 944fa9e4066Sahrens } 945fa9e4066Sahrens 946fa9e4066Sahrens void * 947fa9e4066Sahrens dsl_dataset_get_user_ptr(dsl_dataset_t *ds) 948fa9e4066Sahrens { 949fa9e4066Sahrens return (ds->ds_user_ptr); 950fa9e4066Sahrens } 951fa9e4066Sahrens 952fa9e4066Sahrens 953c717a561Smaybee blkptr_t * 954c717a561Smaybee dsl_dataset_get_blkptr(dsl_dataset_t *ds) 955fa9e4066Sahrens { 956c717a561Smaybee return (&ds->ds_phys->ds_bp); 957fa9e4066Sahrens } 958fa9e4066Sahrens 959fa9e4066Sahrens void 960fa9e4066Sahrens dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) 961fa9e4066Sahrens { 962fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 963fa9e4066Sahrens /* If it's the meta-objset, set dp_meta_rootbp */ 964fa9e4066Sahrens if (ds == NULL) { 965fa9e4066Sahrens tx->tx_pool->dp_meta_rootbp = *bp; 966fa9e4066Sahrens } else { 967fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 968fa9e4066Sahrens ds->ds_phys->ds_bp = *bp; 969fa9e4066Sahrens } 970fa9e4066Sahrens } 971fa9e4066Sahrens 972fa9e4066Sahrens spa_t * 973fa9e4066Sahrens dsl_dataset_get_spa(dsl_dataset_t *ds) 974fa9e4066Sahrens { 975fa9e4066Sahrens return (ds->ds_dir->dd_pool->dp_spa); 976fa9e4066Sahrens } 977fa9e4066Sahrens 978fa9e4066Sahrens void 979fa9e4066Sahrens dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) 980fa9e4066Sahrens { 981fa9e4066Sahrens dsl_pool_t *dp; 982fa9e4066Sahrens 983fa9e4066Sahrens if (ds == NULL) /* this is the meta-objset */ 984fa9e4066Sahrens return; 985fa9e4066Sahrens 986fa9e4066Sahrens ASSERT(ds->ds_user_ptr != NULL); 987a2eea2e1Sahrens 988a2eea2e1Sahrens if (ds->ds_phys->ds_next_snap_obj != 0) 989a2eea2e1Sahrens panic("dirtying snapshot!"); 990fa9e4066Sahrens 991fa9e4066Sahrens dp = ds->ds_dir->dd_pool; 992fa9e4066Sahrens 993fa9e4066Sahrens if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) { 994fa9e4066Sahrens /* up the hold count until we can be written out */ 995fa9e4066Sahrens dmu_buf_add_ref(ds->ds_dbuf, ds); 996fa9e4066Sahrens } 997fa9e4066Sahrens } 998fa9e4066Sahrens 999a9799022Sck /* 1000a9799022Sck * The unique space in the head dataset can be calculated by subtracting 1001a9799022Sck * the space used in the most recent snapshot, that is still being used 1002a9799022Sck * in this file system, from the space currently in use. To figure out 1003a9799022Sck * the space in the most recent snapshot still in use, we need to take 1004a9799022Sck * the total space used in the snapshot and subtract out the space that 1005a9799022Sck * has been freed up since the snapshot was taken. 1006a9799022Sck */ 1007a9799022Sck static void 1008a9799022Sck dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) 1009a9799022Sck { 1010a9799022Sck uint64_t mrs_used; 1011a9799022Sck uint64_t dlused, dlcomp, dluncomp; 1012a9799022Sck 1013a9799022Sck ASSERT(ds->ds_object == ds->ds_dir->dd_phys->dd_head_dataset_obj); 1014a9799022Sck 1015a9799022Sck if (ds->ds_phys->ds_prev_snap_obj != 0) 1016a9799022Sck mrs_used = ds->ds_prev->ds_phys->ds_used_bytes; 1017a9799022Sck else 1018a9799022Sck mrs_used = 0; 1019a9799022Sck 1020a9799022Sck VERIFY(0 == bplist_space(&ds->ds_deadlist, &dlused, &dlcomp, 1021a9799022Sck &dluncomp)); 1022a9799022Sck 1023a9799022Sck ASSERT3U(dlused, <=, mrs_used); 1024a9799022Sck ds->ds_phys->ds_unique_bytes = 1025a9799022Sck ds->ds_phys->ds_used_bytes - (mrs_used - dlused); 1026a9799022Sck 1027a9799022Sck if (!DS_UNIQUE_IS_ACCURATE(ds) && 1028a9799022Sck spa_version(ds->ds_dir->dd_pool->dp_spa) >= 1029a9799022Sck SPA_VERSION_UNIQUE_ACCURATE) 1030a9799022Sck ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 1031a9799022Sck } 1032a9799022Sck 1033a9799022Sck static uint64_t 1034a9799022Sck dsl_dataset_unique(dsl_dataset_t *ds) 1035a9799022Sck { 1036a9799022Sck if (!DS_UNIQUE_IS_ACCURATE(ds) && !dsl_dataset_is_snapshot(ds)) 1037a9799022Sck dsl_dataset_recalc_head_uniq(ds); 1038a9799022Sck 1039a9799022Sck return (ds->ds_phys->ds_unique_bytes); 1040a9799022Sck } 1041a9799022Sck 1042fa9e4066Sahrens struct killarg { 1043a9799022Sck int64_t *usedp; 1044a9799022Sck int64_t *compressedp; 1045a9799022Sck int64_t *uncompressedp; 1046fa9e4066Sahrens zio_t *zio; 1047fa9e4066Sahrens dmu_tx_t *tx; 1048fa9e4066Sahrens }; 1049fa9e4066Sahrens 1050fa9e4066Sahrens static int 1051fa9e4066Sahrens kill_blkptr(traverse_blk_cache_t *bc, spa_t *spa, void *arg) 1052fa9e4066Sahrens { 1053fa9e4066Sahrens struct killarg *ka = arg; 1054fa9e4066Sahrens blkptr_t *bp = &bc->bc_blkptr; 1055fa9e4066Sahrens 1056fa9e4066Sahrens ASSERT3U(bc->bc_errno, ==, 0); 1057fa9e4066Sahrens 1058fa9e4066Sahrens /* 1059fa9e4066Sahrens * Since this callback is not called concurrently, no lock is 1060fa9e4066Sahrens * needed on the accounting values. 1061fa9e4066Sahrens */ 106299653d4eSeschrock *ka->usedp += bp_get_dasize(spa, bp); 1063fa9e4066Sahrens *ka->compressedp += BP_GET_PSIZE(bp); 1064fa9e4066Sahrens *ka->uncompressedp += BP_GET_UCSIZE(bp); 1065fa9e4066Sahrens /* XXX check for EIO? */ 1066fa9e4066Sahrens (void) arc_free(ka->zio, spa, ka->tx->tx_txg, bp, NULL, NULL, 1067fa9e4066Sahrens ARC_NOWAIT); 1068fa9e4066Sahrens return (0); 1069fa9e4066Sahrens } 1070fa9e4066Sahrens 1071fa9e4066Sahrens /* ARGSUSED */ 10721d452cf5Sahrens static int 10731d452cf5Sahrens dsl_dataset_rollback_check(void *arg1, void *arg2, dmu_tx_t *tx) 1074fa9e4066Sahrens { 10751d452cf5Sahrens dsl_dataset_t *ds = arg1; 10763cb34c60Sahrens dmu_objset_type_t *ost = arg2; 1077fa9e4066Sahrens 10781d452cf5Sahrens /* 10793cb34c60Sahrens * We can only roll back to emptyness if it is a ZPL objset. 10801d452cf5Sahrens */ 10813cb34c60Sahrens if (*ost != DMU_OST_ZFS && ds->ds_phys->ds_prev_snap_txg == 0) 1082fa9e4066Sahrens return (EINVAL); 1083fa9e4066Sahrens 10841d452cf5Sahrens /* 10851d452cf5Sahrens * This must not be a snapshot. 10861d452cf5Sahrens */ 10871d452cf5Sahrens if (ds->ds_phys->ds_next_snap_obj != 0) 1088fa9e4066Sahrens return (EINVAL); 1089fa9e4066Sahrens 1090fa9e4066Sahrens /* 1091fa9e4066Sahrens * If we made changes this txg, traverse_dsl_dataset won't find 1092fa9e4066Sahrens * them. Try again. 1093fa9e4066Sahrens */ 10941d452cf5Sahrens if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) 1095fa9e4066Sahrens return (EAGAIN); 1096fa9e4066Sahrens 10971d452cf5Sahrens return (0); 10981d452cf5Sahrens } 10991d452cf5Sahrens 11001d452cf5Sahrens /* ARGSUSED */ 11011d452cf5Sahrens static void 1102ecd6cf80Smarks dsl_dataset_rollback_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) 11031d452cf5Sahrens { 11041d452cf5Sahrens dsl_dataset_t *ds = arg1; 11053cb34c60Sahrens dmu_objset_type_t *ost = arg2; 11061d452cf5Sahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 1107fa9e4066Sahrens 1108fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1109fa9e4066Sahrens 111086ccc033Sperrin /* 111186ccc033Sperrin * Before the roll back destroy the zil. 111286ccc033Sperrin */ 111386ccc033Sperrin if (ds->ds_user_ptr != NULL) { 111486ccc033Sperrin zil_rollback_destroy( 111586ccc033Sperrin ((objset_impl_t *)ds->ds_user_ptr)->os_zil, tx); 11163cb34c60Sahrens 11173cb34c60Sahrens /* 11183cb34c60Sahrens * We need to make sure that the objset_impl_t is reopened after 11193cb34c60Sahrens * we do the rollback, otherwise it will have the wrong 11203cb34c60Sahrens * objset_phys_t. Normally this would happen when this 11213cb34c60Sahrens * DS_MODE_EXCLUSIVE dataset-open is closed, thus causing the 11223cb34c60Sahrens * dataset to be immediately evicted. But when doing "zfs recv 11233cb34c60Sahrens * -F", we reopen the objset before that, so that there is no 11243cb34c60Sahrens * window where the dataset is closed and inconsistent. 11253cb34c60Sahrens */ 11263cb34c60Sahrens ds->ds_user_evict_func(ds, ds->ds_user_ptr); 11273cb34c60Sahrens ds->ds_user_ptr = NULL; 112886ccc033Sperrin } 11293a8a1de4Sperrin 1130fa9e4066Sahrens /* Zero out the deadlist. */ 1131fa9e4066Sahrens bplist_close(&ds->ds_deadlist); 1132fa9e4066Sahrens bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); 1133fa9e4066Sahrens ds->ds_phys->ds_deadlist_obj = 1134fa9e4066Sahrens bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); 1135ea8dc4b6Seschrock VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, 1136ea8dc4b6Seschrock ds->ds_phys->ds_deadlist_obj)); 1137fa9e4066Sahrens 1138fa9e4066Sahrens { 1139fa9e4066Sahrens /* Free blkptrs that we gave birth to */ 1140fa9e4066Sahrens zio_t *zio; 1141a9799022Sck int64_t used = 0, compressed = 0, uncompressed = 0; 1142fa9e4066Sahrens struct killarg ka; 1143d9b87188Sck int64_t delta; 1144fa9e4066Sahrens 1145fa9e4066Sahrens zio = zio_root(tx->tx_pool->dp_spa, NULL, NULL, 1146fa9e4066Sahrens ZIO_FLAG_MUSTSUCCEED); 1147fa9e4066Sahrens ka.usedp = &used; 1148fa9e4066Sahrens ka.compressedp = &compressed; 1149fa9e4066Sahrens ka.uncompressedp = &uncompressed; 1150fa9e4066Sahrens ka.zio = zio; 1151fa9e4066Sahrens ka.tx = tx; 1152fa9e4066Sahrens (void) traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, 1153fa9e4066Sahrens ADVANCE_POST, kill_blkptr, &ka); 1154fa9e4066Sahrens (void) zio_wait(zio); 1155fa9e4066Sahrens 1156d9b87188Sck /* only deduct space beyond any refreservation */ 1157d9b87188Sck delta = parent_delta(ds, -used); 11581d452cf5Sahrens dsl_dir_diduse_space(ds->ds_dir, 1159d9b87188Sck delta, -compressed, -uncompressed, tx); 1160fa9e4066Sahrens } 1161fa9e4066Sahrens 11623cb34c60Sahrens if (ds->ds_prev) { 11633cb34c60Sahrens /* Change our contents to that of the prev snapshot */ 11643cb34c60Sahrens ASSERT3U(ds->ds_prev->ds_object, ==, 11653cb34c60Sahrens ds->ds_phys->ds_prev_snap_obj); 11663cb34c60Sahrens ds->ds_phys->ds_bp = ds->ds_prev->ds_phys->ds_bp; 11673cb34c60Sahrens ds->ds_phys->ds_used_bytes = 11683cb34c60Sahrens ds->ds_prev->ds_phys->ds_used_bytes; 11693cb34c60Sahrens ds->ds_phys->ds_compressed_bytes = 11703cb34c60Sahrens ds->ds_prev->ds_phys->ds_compressed_bytes; 11713cb34c60Sahrens ds->ds_phys->ds_uncompressed_bytes = 11723cb34c60Sahrens ds->ds_prev->ds_phys->ds_uncompressed_bytes; 11733cb34c60Sahrens ds->ds_phys->ds_flags = ds->ds_prev->ds_phys->ds_flags; 11743cb34c60Sahrens ds->ds_phys->ds_unique_bytes = 0; 1175fa9e4066Sahrens 11763cb34c60Sahrens if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { 11773cb34c60Sahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 11783cb34c60Sahrens ds->ds_prev->ds_phys->ds_unique_bytes = 0; 11793cb34c60Sahrens } 11803cb34c60Sahrens } else { 11813cb34c60Sahrens /* Zero out our contents, recreate objset */ 11823cb34c60Sahrens bzero(&ds->ds_phys->ds_bp, sizeof (blkptr_t)); 11833cb34c60Sahrens ds->ds_phys->ds_used_bytes = 0; 11843cb34c60Sahrens ds->ds_phys->ds_compressed_bytes = 0; 11853cb34c60Sahrens ds->ds_phys->ds_uncompressed_bytes = 0; 11863cb34c60Sahrens ds->ds_phys->ds_flags = 0; 11873cb34c60Sahrens ds->ds_phys->ds_unique_bytes = 0; 11883cb34c60Sahrens (void) dmu_objset_create_impl(ds->ds_dir->dd_pool->dp_spa, ds, 11893cb34c60Sahrens &ds->ds_phys->ds_bp, *ost, tx); 119085edac42Sahrens } 1191ecd6cf80Smarks 1192ecd6cf80Smarks spa_history_internal_log(LOG_DS_ROLLBACK, ds->ds_dir->dd_pool->dp_spa, 1193ecd6cf80Smarks tx, cr, "dataset = %llu", ds->ds_object); 1194fa9e4066Sahrens } 1195fa9e4066Sahrens 1196e1930233Sbonwick /* ARGSUSED */ 1197e1930233Sbonwick static int 11981d452cf5Sahrens dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx) 1199e1930233Sbonwick { 12001d452cf5Sahrens dsl_dataset_t *ds = arg1; 12013cb34c60Sahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 12023cb34c60Sahrens uint64_t count; 12033cb34c60Sahrens int err; 1204e1930233Sbonwick 1205e1930233Sbonwick /* 1206e1930233Sbonwick * Can't delete a head dataset if there are snapshots of it. 1207e1930233Sbonwick * (Except if the only snapshots are from the branch we cloned 1208e1930233Sbonwick * from.) 1209e1930233Sbonwick */ 1210e1930233Sbonwick if (ds->ds_prev != NULL && 1211e1930233Sbonwick ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) 1212e1930233Sbonwick return (EINVAL); 1213e1930233Sbonwick 12143cb34c60Sahrens /* 12153cb34c60Sahrens * This is really a dsl_dir thing, but check it here so that 12163cb34c60Sahrens * we'll be less likely to leave this dataset inconsistent & 12173cb34c60Sahrens * nearly destroyed. 12183cb34c60Sahrens */ 12193cb34c60Sahrens err = zap_count(mos, ds->ds_dir->dd_phys->dd_child_dir_zapobj, &count); 12203cb34c60Sahrens if (err) 12213cb34c60Sahrens return (err); 12223cb34c60Sahrens if (count != 0) 12233cb34c60Sahrens return (EEXIST); 12243cb34c60Sahrens 1225e1930233Sbonwick return (0); 1226e1930233Sbonwick } 1227e1930233Sbonwick 12281d452cf5Sahrens /* ARGSUSED */ 12291d452cf5Sahrens static void 1230ecd6cf80Smarks dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) 1231fa9e4066Sahrens { 12321d452cf5Sahrens dsl_dataset_t *ds = arg1; 1233ecd6cf80Smarks dsl_pool_t *dp = ds->ds_dir->dd_pool; 1234fa9e4066Sahrens 12351d452cf5Sahrens /* Mark it as inconsistent on-disk, in case we crash */ 12361d452cf5Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 12371d452cf5Sahrens ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; 1238ecd6cf80Smarks 1239ecd6cf80Smarks spa_history_internal_log(LOG_DS_DESTROY_BEGIN, dp->dp_spa, tx, 1240ecd6cf80Smarks cr, "dataset = %llu", ds->ds_object); 12411d452cf5Sahrens } 1242fa9e4066Sahrens 12431d452cf5Sahrens /* ARGSUSED */ 12443cb34c60Sahrens int 12451d452cf5Sahrens dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) 12461d452cf5Sahrens { 12471d452cf5Sahrens dsl_dataset_t *ds = arg1; 1248fa9e4066Sahrens 1249fa9e4066Sahrens /* Can't delete a branch point. */ 12501d452cf5Sahrens if (ds->ds_phys->ds_num_children > 1) 12511d452cf5Sahrens return (EEXIST); 1252fa9e4066Sahrens 1253fa9e4066Sahrens /* 1254fa9e4066Sahrens * Can't delete a head dataset if there are snapshots of it. 1255fa9e4066Sahrens * (Except if the only snapshots are from the branch we cloned 1256fa9e4066Sahrens * from.) 1257fa9e4066Sahrens */ 1258fa9e4066Sahrens if (ds->ds_prev != NULL && 12591d452cf5Sahrens ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) 1260fa9e4066Sahrens return (EINVAL); 1261fa9e4066Sahrens 1262fa9e4066Sahrens /* 1263fa9e4066Sahrens * If we made changes this txg, traverse_dsl_dataset won't find 1264fa9e4066Sahrens * them. Try again. 1265fa9e4066Sahrens */ 12661d452cf5Sahrens if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) 1267fa9e4066Sahrens return (EAGAIN); 12681d452cf5Sahrens 12691d452cf5Sahrens /* XXX we should do some i/o error checking... */ 12701d452cf5Sahrens return (0); 12711d452cf5Sahrens } 12721d452cf5Sahrens 12733cb34c60Sahrens void 1274ecd6cf80Smarks dsl_dataset_destroy_sync(void *arg1, void *tag, cred_t *cr, dmu_tx_t *tx) 12751d452cf5Sahrens { 12761d452cf5Sahrens dsl_dataset_t *ds = arg1; 1277a9799022Sck int64_t used = 0, compressed = 0, uncompressed = 0; 12781d452cf5Sahrens zio_t *zio; 12791d452cf5Sahrens int err; 12801d452cf5Sahrens int after_branch_point = FALSE; 12811d452cf5Sahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 12821d452cf5Sahrens objset_t *mos = dp->dp_meta_objset; 12831d452cf5Sahrens dsl_dataset_t *ds_prev = NULL; 12841d452cf5Sahrens uint64_t obj; 12851d452cf5Sahrens 128655434c77Sek ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); 12871d452cf5Sahrens ASSERT3U(ds->ds_phys->ds_num_children, <=, 1); 12881d452cf5Sahrens ASSERT(ds->ds_prev == NULL || 12891d452cf5Sahrens ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object); 12901d452cf5Sahrens ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg); 12911d452cf5Sahrens 1292a9799022Sck /* Remove our reservation */ 1293a9799022Sck if (ds->ds_reserved != 0) { 1294a9799022Sck uint64_t val = 0; 1295a9799022Sck dsl_dataset_set_reservation_sync(ds, &val, cr, tx); 1296a9799022Sck ASSERT3U(ds->ds_reserved, ==, 0); 1297a9799022Sck } 1298a9799022Sck 12991d452cf5Sahrens ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); 13001d452cf5Sahrens 13011d452cf5Sahrens obj = ds->ds_object; 1302fa9e4066Sahrens 1303fa9e4066Sahrens if (ds->ds_phys->ds_prev_snap_obj != 0) { 1304fa9e4066Sahrens if (ds->ds_prev) { 1305fa9e4066Sahrens ds_prev = ds->ds_prev; 1306fa9e4066Sahrens } else { 13071d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 1308fa9e4066Sahrens ds->ds_phys->ds_prev_snap_obj, NULL, 13091d452cf5Sahrens DS_MODE_NONE, FTAG, &ds_prev)); 1310fa9e4066Sahrens } 1311fa9e4066Sahrens after_branch_point = 1312fa9e4066Sahrens (ds_prev->ds_phys->ds_next_snap_obj != obj); 1313fa9e4066Sahrens 1314fa9e4066Sahrens dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); 1315fa9e4066Sahrens if (after_branch_point && 1316fa9e4066Sahrens ds->ds_phys->ds_next_snap_obj == 0) { 1317fa9e4066Sahrens /* This clone is toast. */ 1318fa9e4066Sahrens ASSERT(ds_prev->ds_phys->ds_num_children > 1); 1319fa9e4066Sahrens ds_prev->ds_phys->ds_num_children--; 1320fa9e4066Sahrens } else if (!after_branch_point) { 1321fa9e4066Sahrens ds_prev->ds_phys->ds_next_snap_obj = 1322fa9e4066Sahrens ds->ds_phys->ds_next_snap_obj; 1323fa9e4066Sahrens } 1324fa9e4066Sahrens } 1325fa9e4066Sahrens 1326fa9e4066Sahrens zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1327fa9e4066Sahrens 1328fa9e4066Sahrens if (ds->ds_phys->ds_next_snap_obj != 0) { 13291d452cf5Sahrens blkptr_t bp; 1330fa9e4066Sahrens dsl_dataset_t *ds_next; 1331fa9e4066Sahrens uint64_t itor = 0; 1332a9799022Sck uint64_t old_unique; 1333fa9e4066Sahrens 1334fa9e4066Sahrens spa_scrub_restart(dp->dp_spa, tx->tx_txg); 1335fa9e4066Sahrens 13361d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 1337ea8dc4b6Seschrock ds->ds_phys->ds_next_snap_obj, NULL, 1338ea8dc4b6Seschrock DS_MODE_NONE, FTAG, &ds_next)); 1339fa9e4066Sahrens ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj); 1340fa9e4066Sahrens 1341a9799022Sck old_unique = dsl_dataset_unique(ds_next); 1342a9799022Sck 1343fa9e4066Sahrens dmu_buf_will_dirty(ds_next->ds_dbuf, tx); 1344fa9e4066Sahrens ds_next->ds_phys->ds_prev_snap_obj = 1345fa9e4066Sahrens ds->ds_phys->ds_prev_snap_obj; 1346fa9e4066Sahrens ds_next->ds_phys->ds_prev_snap_txg = 1347fa9e4066Sahrens ds->ds_phys->ds_prev_snap_txg; 1348fa9e4066Sahrens ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, 1349fa9e4066Sahrens ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0); 1350fa9e4066Sahrens 1351fa9e4066Sahrens /* 1352fa9e4066Sahrens * Transfer to our deadlist (which will become next's 1353fa9e4066Sahrens * new deadlist) any entries from next's current 1354fa9e4066Sahrens * deadlist which were born before prev, and free the 1355fa9e4066Sahrens * other entries. 1356fa9e4066Sahrens * 1357fa9e4066Sahrens * XXX we're doing this long task with the config lock held 1358fa9e4066Sahrens */ 1359fa9e4066Sahrens while (bplist_iterate(&ds_next->ds_deadlist, &itor, 1360fa9e4066Sahrens &bp) == 0) { 1361fa9e4066Sahrens if (bp.blk_birth <= ds->ds_phys->ds_prev_snap_txg) { 1362ea8dc4b6Seschrock VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, 1363ea8dc4b6Seschrock &bp, tx)); 1364fa9e4066Sahrens if (ds_prev && !after_branch_point && 1365fa9e4066Sahrens bp.blk_birth > 1366fa9e4066Sahrens ds_prev->ds_phys->ds_prev_snap_txg) { 1367fa9e4066Sahrens ds_prev->ds_phys->ds_unique_bytes += 136899653d4eSeschrock bp_get_dasize(dp->dp_spa, &bp); 1369fa9e4066Sahrens } 1370fa9e4066Sahrens } else { 137199653d4eSeschrock used += bp_get_dasize(dp->dp_spa, &bp); 1372fa9e4066Sahrens compressed += BP_GET_PSIZE(&bp); 1373fa9e4066Sahrens uncompressed += BP_GET_UCSIZE(&bp); 1374fa9e4066Sahrens /* XXX check return value? */ 1375fa9e4066Sahrens (void) arc_free(zio, dp->dp_spa, tx->tx_txg, 1376fa9e4066Sahrens &bp, NULL, NULL, ARC_NOWAIT); 1377fa9e4066Sahrens } 1378fa9e4066Sahrens } 1379fa9e4066Sahrens 1380fa9e4066Sahrens /* free next's deadlist */ 1381fa9e4066Sahrens bplist_close(&ds_next->ds_deadlist); 1382fa9e4066Sahrens bplist_destroy(mos, ds_next->ds_phys->ds_deadlist_obj, tx); 1383fa9e4066Sahrens 1384fa9e4066Sahrens /* set next's deadlist to our deadlist */ 1385fa9e4066Sahrens ds_next->ds_phys->ds_deadlist_obj = 1386fa9e4066Sahrens ds->ds_phys->ds_deadlist_obj; 1387ea8dc4b6Seschrock VERIFY(0 == bplist_open(&ds_next->ds_deadlist, mos, 1388ea8dc4b6Seschrock ds_next->ds_phys->ds_deadlist_obj)); 1389fa9e4066Sahrens ds->ds_phys->ds_deadlist_obj = 0; 1390fa9e4066Sahrens 1391fa9e4066Sahrens if (ds_next->ds_phys->ds_next_snap_obj != 0) { 1392fa9e4066Sahrens /* 1393fa9e4066Sahrens * Update next's unique to include blocks which 1394fa9e4066Sahrens * were previously shared by only this snapshot 1395fa9e4066Sahrens * and it. Those blocks will be born after the 1396fa9e4066Sahrens * prev snap and before this snap, and will have 1397fa9e4066Sahrens * died after the next snap and before the one 1398fa9e4066Sahrens * after that (ie. be on the snap after next's 1399fa9e4066Sahrens * deadlist). 1400fa9e4066Sahrens * 1401fa9e4066Sahrens * XXX we're doing this long task with the 1402fa9e4066Sahrens * config lock held 1403fa9e4066Sahrens */ 1404fa9e4066Sahrens dsl_dataset_t *ds_after_next; 1405fa9e4066Sahrens 14061d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 1407fa9e4066Sahrens ds_next->ds_phys->ds_next_snap_obj, NULL, 1408ea8dc4b6Seschrock DS_MODE_NONE, FTAG, &ds_after_next)); 1409fa9e4066Sahrens itor = 0; 1410fa9e4066Sahrens while (bplist_iterate(&ds_after_next->ds_deadlist, 1411fa9e4066Sahrens &itor, &bp) == 0) { 1412fa9e4066Sahrens if (bp.blk_birth > 1413fa9e4066Sahrens ds->ds_phys->ds_prev_snap_txg && 1414fa9e4066Sahrens bp.blk_birth <= 1415fa9e4066Sahrens ds->ds_phys->ds_creation_txg) { 1416fa9e4066Sahrens ds_next->ds_phys->ds_unique_bytes += 141799653d4eSeschrock bp_get_dasize(dp->dp_spa, &bp); 1418fa9e4066Sahrens } 1419fa9e4066Sahrens } 1420fa9e4066Sahrens 1421fa9e4066Sahrens dsl_dataset_close(ds_after_next, DS_MODE_NONE, FTAG); 1422fa9e4066Sahrens ASSERT3P(ds_next->ds_prev, ==, NULL); 1423fa9e4066Sahrens } else { 1424fa9e4066Sahrens ASSERT3P(ds_next->ds_prev, ==, ds); 1425fa9e4066Sahrens dsl_dataset_close(ds_next->ds_prev, DS_MODE_NONE, 1426fa9e4066Sahrens ds_next); 1427fa9e4066Sahrens if (ds_prev) { 14281d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 1429ea8dc4b6Seschrock ds->ds_phys->ds_prev_snap_obj, NULL, 1430ea8dc4b6Seschrock DS_MODE_NONE, ds_next, &ds_next->ds_prev)); 1431fa9e4066Sahrens } else { 1432fa9e4066Sahrens ds_next->ds_prev = NULL; 1433fa9e4066Sahrens } 1434a9799022Sck 1435a9799022Sck dsl_dataset_recalc_head_uniq(ds_next); 1436a9799022Sck 1437a9799022Sck /* 1438a9799022Sck * Reduce the amount of our unconsmed refreservation 1439a9799022Sck * being charged to our parent by the amount of 1440a9799022Sck * new unique data we have gained. 1441a9799022Sck */ 1442a9799022Sck if (old_unique < ds_next->ds_reserved) { 1443a9799022Sck int64_t mrsdelta; 1444a9799022Sck uint64_t new_unique = 1445a9799022Sck ds_next->ds_phys->ds_unique_bytes; 1446a9799022Sck 1447a9799022Sck ASSERT(old_unique <= new_unique); 1448a9799022Sck mrsdelta = MIN(new_unique - old_unique, 1449a9799022Sck ds_next->ds_reserved - old_unique); 1450a9799022Sck dsl_dir_diduse_space(ds->ds_dir, -mrsdelta, 1451a9799022Sck 0, 0, tx); 1452a9799022Sck } 1453fa9e4066Sahrens } 1454fa9e4066Sahrens dsl_dataset_close(ds_next, DS_MODE_NONE, FTAG); 1455fa9e4066Sahrens 1456fa9e4066Sahrens /* 1457a9799022Sck * NB: unique_bytes might not be accurate for the head objset. 1458a9799022Sck * Before SPA_VERSION 9, we didn't update its value when we 1459a9799022Sck * deleted the most recent snapshot. 1460fa9e4066Sahrens */ 1461fa9e4066Sahrens ASSERT3U(used, ==, ds->ds_phys->ds_unique_bytes); 1462fa9e4066Sahrens } else { 1463fa9e4066Sahrens /* 1464fa9e4066Sahrens * There's no next snapshot, so this is a head dataset. 1465fa9e4066Sahrens * Destroy the deadlist. Unless it's a clone, the 1466fa9e4066Sahrens * deadlist should be empty. (If it's a clone, it's 1467fa9e4066Sahrens * safe to ignore the deadlist contents.) 1468fa9e4066Sahrens */ 1469fa9e4066Sahrens struct killarg ka; 1470fa9e4066Sahrens 1471fa9e4066Sahrens ASSERT(after_branch_point || bplist_empty(&ds->ds_deadlist)); 1472fa9e4066Sahrens bplist_close(&ds->ds_deadlist); 1473fa9e4066Sahrens bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); 1474fa9e4066Sahrens ds->ds_phys->ds_deadlist_obj = 0; 1475fa9e4066Sahrens 1476fa9e4066Sahrens /* 1477fa9e4066Sahrens * Free everything that we point to (that's born after 1478fa9e4066Sahrens * the previous snapshot, if we are a clone) 1479fa9e4066Sahrens * 1480fa9e4066Sahrens * XXX we're doing this long task with the config lock held 1481fa9e4066Sahrens */ 1482fa9e4066Sahrens ka.usedp = &used; 1483fa9e4066Sahrens ka.compressedp = &compressed; 1484fa9e4066Sahrens ka.uncompressedp = &uncompressed; 1485fa9e4066Sahrens ka.zio = zio; 1486fa9e4066Sahrens ka.tx = tx; 1487fa9e4066Sahrens err = traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, 1488fa9e4066Sahrens ADVANCE_POST, kill_blkptr, &ka); 1489fa9e4066Sahrens ASSERT3U(err, ==, 0); 1490a9799022Sck ASSERT(spa_version(dp->dp_spa) < 1491a9799022Sck SPA_VERSION_UNIQUE_ACCURATE || 1492a9799022Sck used == ds->ds_phys->ds_unique_bytes); 1493fa9e4066Sahrens } 1494fa9e4066Sahrens 1495fa9e4066Sahrens err = zio_wait(zio); 1496fa9e4066Sahrens ASSERT3U(err, ==, 0); 1497fa9e4066Sahrens 14981d452cf5Sahrens dsl_dir_diduse_space(ds->ds_dir, -used, -compressed, -uncompressed, tx); 1499fa9e4066Sahrens 1500fa9e4066Sahrens if (ds->ds_phys->ds_snapnames_zapobj) { 1501fa9e4066Sahrens err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx); 1502fa9e4066Sahrens ASSERT(err == 0); 1503fa9e4066Sahrens } 1504fa9e4066Sahrens 15051d452cf5Sahrens if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) { 1506fa9e4066Sahrens /* Erase the link in the dataset */ 15071d452cf5Sahrens dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); 15081d452cf5Sahrens ds->ds_dir->dd_phys->dd_head_dataset_obj = 0; 1509fa9e4066Sahrens /* 1510fa9e4066Sahrens * dsl_dir_sync_destroy() called us, they'll destroy 1511fa9e4066Sahrens * the dataset. 1512fa9e4066Sahrens */ 1513fa9e4066Sahrens } else { 1514fa9e4066Sahrens /* remove from snapshot namespace */ 1515fa9e4066Sahrens dsl_dataset_t *ds_head; 15161d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 15171d452cf5Sahrens ds->ds_dir->dd_phys->dd_head_dataset_obj, NULL, 1518ea8dc4b6Seschrock DS_MODE_NONE, FTAG, &ds_head)); 15198660574dSahrens VERIFY(0 == dsl_dataset_get_snapname(ds)); 1520fa9e4066Sahrens #ifdef ZFS_DEBUG 1521fa9e4066Sahrens { 1522fa9e4066Sahrens uint64_t val; 1523fa9e4066Sahrens err = zap_lookup(mos, 1524fa9e4066Sahrens ds_head->ds_phys->ds_snapnames_zapobj, 15251d452cf5Sahrens ds->ds_snapname, 8, 1, &val); 1526fa9e4066Sahrens ASSERT3U(err, ==, 0); 1527fa9e4066Sahrens ASSERT3U(val, ==, obj); 1528fa9e4066Sahrens } 1529fa9e4066Sahrens #endif 1530fa9e4066Sahrens err = zap_remove(mos, ds_head->ds_phys->ds_snapnames_zapobj, 15311d452cf5Sahrens ds->ds_snapname, tx); 1532fa9e4066Sahrens ASSERT(err == 0); 1533fa9e4066Sahrens dsl_dataset_close(ds_head, DS_MODE_NONE, FTAG); 1534fa9e4066Sahrens } 1535fa9e4066Sahrens 1536fa9e4066Sahrens if (ds_prev && ds->ds_prev != ds_prev) 1537fa9e4066Sahrens dsl_dataset_close(ds_prev, DS_MODE_NONE, FTAG); 1538fa9e4066Sahrens 1539990b4856Slling spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx); 1540ecd6cf80Smarks spa_history_internal_log(LOG_DS_DESTROY, dp->dp_spa, tx, 1541ecd6cf80Smarks cr, "dataset = %llu", ds->ds_object); 1542ecd6cf80Smarks 15431d452cf5Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); 15441d452cf5Sahrens VERIFY(0 == dmu_object_free(mos, obj, tx)); 1545b1b8ab34Slling 1546fa9e4066Sahrens } 1547fa9e4066Sahrens 1548a9799022Sck static int 1549a9799022Sck dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) 1550a9799022Sck { 1551a9799022Sck uint64_t asize; 1552a9799022Sck 1553a9799022Sck if (!dmu_tx_is_syncing(tx)) 1554a9799022Sck return (0); 1555a9799022Sck 1556a9799022Sck /* 1557a9799022Sck * If there's an fs-only reservation, any blocks that might become 1558a9799022Sck * owned by the snapshot dataset must be accommodated by space 1559a9799022Sck * outside of the reservation. 1560a9799022Sck */ 1561a9799022Sck asize = MIN(dsl_dataset_unique(ds), ds->ds_reserved); 1562a9799022Sck if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, FALSE)) 1563a9799022Sck return (ENOSPC); 1564a9799022Sck 1565a9799022Sck /* 1566a9799022Sck * Propogate any reserved space for this snapshot to other 1567a9799022Sck * snapshot checks in this sync group. 1568a9799022Sck */ 1569a9799022Sck if (asize > 0) 1570a9799022Sck dsl_dir_willuse_space(ds->ds_dir, asize, tx); 1571a9799022Sck 1572a9799022Sck return (0); 1573a9799022Sck } 1574a9799022Sck 15751d452cf5Sahrens /* ARGSUSED */ 1576fa9e4066Sahrens int 15771d452cf5Sahrens dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) 1578fa9e4066Sahrens { 15793cb34c60Sahrens dsl_dataset_t *ds = arg1; 15801d452cf5Sahrens const char *snapname = arg2; 15811d452cf5Sahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 1582fa9e4066Sahrens int err; 15831d452cf5Sahrens uint64_t value; 1584fa9e4066Sahrens 15851d452cf5Sahrens /* 15861d452cf5Sahrens * We don't allow multiple snapshots of the same txg. If there 15871d452cf5Sahrens * is already one, try again. 15881d452cf5Sahrens */ 15891d452cf5Sahrens if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg) 15901d452cf5Sahrens return (EAGAIN); 1591fa9e4066Sahrens 15921d452cf5Sahrens /* 15931d452cf5Sahrens * Check for conflicting name snapshot name. 15941d452cf5Sahrens */ 1595fa9e4066Sahrens err = zap_lookup(mos, ds->ds_phys->ds_snapnames_zapobj, 1596fa9e4066Sahrens snapname, 8, 1, &value); 15971d452cf5Sahrens if (err == 0) 1598fa9e4066Sahrens return (EEXIST); 15991d452cf5Sahrens if (err != ENOENT) 16001d452cf5Sahrens return (err); 1601fa9e4066Sahrens 1602b7661cccSmmusante /* 1603b7661cccSmmusante * Check that the dataset's name is not too long. Name consists 1604b7661cccSmmusante * of the dataset's length + 1 for the @-sign + snapshot name's length 1605b7661cccSmmusante */ 1606b7661cccSmmusante if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN) 1607b7661cccSmmusante return (ENAMETOOLONG); 1608b7661cccSmmusante 1609a9799022Sck err = dsl_dataset_snapshot_reserve_space(ds, tx); 1610a9799022Sck if (err) 1611a9799022Sck return (err); 1612a9799022Sck 16131d452cf5Sahrens ds->ds_trysnap_txg = tx->tx_txg; 16141d452cf5Sahrens return (0); 16151d452cf5Sahrens } 1616fa9e4066Sahrens 16171d452cf5Sahrens void 1618ecd6cf80Smarks dsl_dataset_snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) 16191d452cf5Sahrens { 16203cb34c60Sahrens dsl_dataset_t *ds = arg1; 16211d452cf5Sahrens const char *snapname = arg2; 16221d452cf5Sahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 16231d452cf5Sahrens dmu_buf_t *dbuf; 16241d452cf5Sahrens dsl_dataset_phys_t *dsphys; 16251d452cf5Sahrens uint64_t dsobj; 16261d452cf5Sahrens objset_t *mos = dp->dp_meta_objset; 16271d452cf5Sahrens int err; 1628fa9e4066Sahrens 1629fa9e4066Sahrens spa_scrub_restart(dp->dp_spa, tx->tx_txg); 16301d452cf5Sahrens ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); 1631fa9e4066Sahrens 16321649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 16331649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 1634ea8dc4b6Seschrock VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 1635fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 1636fa9e4066Sahrens dsphys = dbuf->db_data; 16371d452cf5Sahrens dsphys->ds_dir_obj = ds->ds_dir->dd_object; 1638fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 1639fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 1640fa9e4066Sahrens sizeof (dsphys->ds_guid)); 1641fa9e4066Sahrens dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj; 1642fa9e4066Sahrens dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg; 1643fa9e4066Sahrens dsphys->ds_next_snap_obj = ds->ds_object; 1644fa9e4066Sahrens dsphys->ds_num_children = 1; 1645fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 1646fa9e4066Sahrens dsphys->ds_creation_txg = tx->tx_txg; 1647fa9e4066Sahrens dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj; 1648fa9e4066Sahrens dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes; 1649fa9e4066Sahrens dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes; 1650fa9e4066Sahrens dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes; 165199653d4eSeschrock dsphys->ds_flags = ds->ds_phys->ds_flags; 1652fa9e4066Sahrens dsphys->ds_bp = ds->ds_phys->ds_bp; 1653ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 1654fa9e4066Sahrens 16551d452cf5Sahrens ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0); 16561d452cf5Sahrens if (ds->ds_prev) { 16571d452cf5Sahrens ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj == 1658fa9e4066Sahrens ds->ds_object || 16591d452cf5Sahrens ds->ds_prev->ds_phys->ds_num_children > 1); 16601d452cf5Sahrens if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { 16611d452cf5Sahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 1662fa9e4066Sahrens ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, 16631d452cf5Sahrens ds->ds_prev->ds_phys->ds_creation_txg); 16641d452cf5Sahrens ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj; 1665fa9e4066Sahrens } 1666fa9e4066Sahrens } 1667fa9e4066Sahrens 1668a9799022Sck /* 1669a9799022Sck * If we have a reference-reservation on this dataset, we will 1670a9799022Sck * need to increase the amount of refreservation being charged 1671a9799022Sck * since our unique space is going to zero. 1672a9799022Sck */ 1673a9799022Sck if (ds->ds_reserved) { 1674a9799022Sck int64_t add = MIN(dsl_dataset_unique(ds), ds->ds_reserved); 1675a9799022Sck dsl_dir_diduse_space(ds->ds_dir, add, 0, 0, tx); 1676a9799022Sck } 1677a9799022Sck 1678fa9e4066Sahrens bplist_close(&ds->ds_deadlist); 1679fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1680*a4611edeSahrens ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, tx->tx_txg); 1681fa9e4066Sahrens ds->ds_phys->ds_prev_snap_obj = dsobj; 1682*a4611edeSahrens ds->ds_phys->ds_prev_snap_txg = tx->tx_txg; 1683fa9e4066Sahrens ds->ds_phys->ds_unique_bytes = 0; 1684a9799022Sck if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) 1685a9799022Sck ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 1686fa9e4066Sahrens ds->ds_phys->ds_deadlist_obj = 1687fa9e4066Sahrens bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); 1688ea8dc4b6Seschrock VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, 1689ea8dc4b6Seschrock ds->ds_phys->ds_deadlist_obj)); 1690fa9e4066Sahrens 1691fa9e4066Sahrens dprintf("snap '%s' -> obj %llu\n", snapname, dsobj); 1692fa9e4066Sahrens err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj, 1693fa9e4066Sahrens snapname, 8, 1, &dsobj, tx); 1694fa9e4066Sahrens ASSERT(err == 0); 1695fa9e4066Sahrens 1696fa9e4066Sahrens if (ds->ds_prev) 1697fa9e4066Sahrens dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); 1698ea8dc4b6Seschrock VERIFY(0 == dsl_dataset_open_obj(dp, 1699ea8dc4b6Seschrock ds->ds_phys->ds_prev_snap_obj, snapname, 1700ea8dc4b6Seschrock DS_MODE_NONE, ds, &ds->ds_prev)); 1701ecd6cf80Smarks 1702ecd6cf80Smarks spa_history_internal_log(LOG_DS_SNAPSHOT, dp->dp_spa, tx, cr, 170340feaa91Sahrens "dataset = %llu", dsobj); 1704fa9e4066Sahrens } 1705fa9e4066Sahrens 1706fa9e4066Sahrens void 1707c717a561Smaybee dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) 1708fa9e4066Sahrens { 1709fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 1710fa9e4066Sahrens ASSERT(ds->ds_user_ptr != NULL); 1711fa9e4066Sahrens ASSERT(ds->ds_phys->ds_next_snap_obj == 0); 1712fa9e4066Sahrens 171391ebeef5Sahrens /* 171491ebeef5Sahrens * in case we had to change ds_fsid_guid when we opened it, 171591ebeef5Sahrens * sync it out now. 171691ebeef5Sahrens */ 171791ebeef5Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 171891ebeef5Sahrens ds->ds_phys->ds_fsid_guid = ds->ds_fsid_guid; 171991ebeef5Sahrens 1720fa9e4066Sahrens dsl_dir_dirty(ds->ds_dir, tx); 1721c717a561Smaybee dmu_objset_sync(ds->ds_user_ptr, zio, tx); 1722fa9e4066Sahrens } 1723fa9e4066Sahrens 1724fa9e4066Sahrens void 1725a2eea2e1Sahrens dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) 1726fa9e4066Sahrens { 1727a9799022Sck uint64_t refd, avail, uobjs, aobjs; 1728a9799022Sck 1729a2eea2e1Sahrens dsl_dir_stats(ds->ds_dir, nv); 1730fa9e4066Sahrens 1731a9799022Sck dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); 1732a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); 1733a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); 1734a9799022Sck 1735a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, 1736a2eea2e1Sahrens ds->ds_phys->ds_creation_time); 1737a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, 1738a2eea2e1Sahrens ds->ds_phys->ds_creation_txg); 1739a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, 1740a9799022Sck ds->ds_quota); 1741a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, 1742a9799022Sck ds->ds_reserved); 1743fa9e4066Sahrens 1744fa9e4066Sahrens if (ds->ds_phys->ds_next_snap_obj) { 1745fa9e4066Sahrens /* 1746fa9e4066Sahrens * This is a snapshot; override the dd's space used with 1747a2eea2e1Sahrens * our unique space and compression ratio. 1748fa9e4066Sahrens */ 1749a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, 1750a2eea2e1Sahrens ds->ds_phys->ds_unique_bytes); 1751a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, 1752a2eea2e1Sahrens ds->ds_phys->ds_compressed_bytes == 0 ? 100 : 1753a2eea2e1Sahrens (ds->ds_phys->ds_uncompressed_bytes * 100 / 1754a2eea2e1Sahrens ds->ds_phys->ds_compressed_bytes)); 1755fa9e4066Sahrens } 1756fa9e4066Sahrens } 1757fa9e4066Sahrens 1758a2eea2e1Sahrens void 1759a2eea2e1Sahrens dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) 1760a2eea2e1Sahrens { 1761a2eea2e1Sahrens stat->dds_creation_txg = ds->ds_phys->ds_creation_txg; 1762a2eea2e1Sahrens stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT; 17633cb34c60Sahrens stat->dds_guid = ds->ds_phys->ds_guid; 1764a2eea2e1Sahrens if (ds->ds_phys->ds_next_snap_obj) { 1765a2eea2e1Sahrens stat->dds_is_snapshot = B_TRUE; 1766a2eea2e1Sahrens stat->dds_num_clones = ds->ds_phys->ds_num_children - 1; 1767a2eea2e1Sahrens } 1768a2eea2e1Sahrens 1769a2eea2e1Sahrens /* clone origin is really a dsl_dir thing... */ 17704ccbb6e7Sahrens rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); 17713cb34c60Sahrens if (ds->ds_dir->dd_phys->dd_origin_obj) { 1772a2eea2e1Sahrens dsl_dataset_t *ods; 1773a2eea2e1Sahrens 1774a2eea2e1Sahrens VERIFY(0 == dsl_dataset_open_obj(ds->ds_dir->dd_pool, 17753cb34c60Sahrens ds->ds_dir->dd_phys->dd_origin_obj, 1776a2eea2e1Sahrens NULL, DS_MODE_NONE, FTAG, &ods)); 17773cb34c60Sahrens dsl_dataset_name(ods, stat->dds_origin); 1778a2eea2e1Sahrens dsl_dataset_close(ods, DS_MODE_NONE, FTAG); 1779a2eea2e1Sahrens } 17804ccbb6e7Sahrens rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); 1781a2eea2e1Sahrens } 1782a2eea2e1Sahrens 1783a2eea2e1Sahrens uint64_t 1784a2eea2e1Sahrens dsl_dataset_fsid_guid(dsl_dataset_t *ds) 1785a2eea2e1Sahrens { 178691ebeef5Sahrens return (ds->ds_fsid_guid); 1787a2eea2e1Sahrens } 1788a2eea2e1Sahrens 1789a2eea2e1Sahrens void 1790a2eea2e1Sahrens dsl_dataset_space(dsl_dataset_t *ds, 1791a2eea2e1Sahrens uint64_t *refdbytesp, uint64_t *availbytesp, 1792a2eea2e1Sahrens uint64_t *usedobjsp, uint64_t *availobjsp) 1793fa9e4066Sahrens { 1794a2eea2e1Sahrens *refdbytesp = ds->ds_phys->ds_used_bytes; 1795a2eea2e1Sahrens *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); 1796a9799022Sck if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) 1797a9799022Sck *availbytesp += ds->ds_reserved - ds->ds_phys->ds_unique_bytes; 1798a9799022Sck if (ds->ds_quota != 0) { 1799a9799022Sck /* 1800a9799022Sck * Adjust available bytes according to refquota 1801a9799022Sck */ 1802a9799022Sck if (*refdbytesp < ds->ds_quota) 1803a9799022Sck *availbytesp = MIN(*availbytesp, 1804a9799022Sck ds->ds_quota - *refdbytesp); 1805a9799022Sck else 1806a9799022Sck *availbytesp = 0; 1807a9799022Sck } 1808a2eea2e1Sahrens *usedobjsp = ds->ds_phys->ds_bp.blk_fill; 1809a2eea2e1Sahrens *availobjsp = DN_MAX_OBJECT - *usedobjsp; 1810fa9e4066Sahrens } 1811fa9e4066Sahrens 1812f18faf3fSek boolean_t 1813f18faf3fSek dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds) 1814f18faf3fSek { 1815f18faf3fSek dsl_pool_t *dp = ds->ds_dir->dd_pool; 1816f18faf3fSek 1817f18faf3fSek ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || 1818f18faf3fSek dsl_pool_sync_context(dp)); 1819f18faf3fSek if (ds->ds_prev == NULL) 1820f18faf3fSek return (B_FALSE); 1821f18faf3fSek if (ds->ds_phys->ds_bp.blk_birth > 1822f18faf3fSek ds->ds_prev->ds_phys->ds_creation_txg) 1823f18faf3fSek return (B_TRUE); 1824f18faf3fSek return (B_FALSE); 1825f18faf3fSek } 1826f18faf3fSek 18271d452cf5Sahrens /* ARGSUSED */ 1828fa9e4066Sahrens static int 18291d452cf5Sahrens dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) 1830fa9e4066Sahrens { 18311d452cf5Sahrens dsl_dataset_t *ds = arg1; 18321d452cf5Sahrens char *newsnapname = arg2; 18331d452cf5Sahrens dsl_dir_t *dd = ds->ds_dir; 1834fa9e4066Sahrens objset_t *mos = dd->dd_pool->dp_meta_objset; 18351d452cf5Sahrens dsl_dataset_t *hds; 1836fa9e4066Sahrens uint64_t val; 18371d452cf5Sahrens int err; 1838fa9e4066Sahrens 18391d452cf5Sahrens err = dsl_dataset_open_obj(dd->dd_pool, 18401d452cf5Sahrens dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds); 1841fa9e4066Sahrens if (err) 1842fa9e4066Sahrens return (err); 1843fa9e4066Sahrens 18441d452cf5Sahrens /* new name better not be in use */ 18451d452cf5Sahrens err = zap_lookup(mos, hds->ds_phys->ds_snapnames_zapobj, 18461d452cf5Sahrens newsnapname, 8, 1, &val); 18471d452cf5Sahrens dsl_dataset_close(hds, DS_MODE_NONE, FTAG); 18481d452cf5Sahrens 18491d452cf5Sahrens if (err == 0) 18501d452cf5Sahrens err = EEXIST; 18511d452cf5Sahrens else if (err == ENOENT) 18521d452cf5Sahrens err = 0; 1853cdf5b4caSmmusante 1854cdf5b4caSmmusante /* dataset name + 1 for the "@" + the new snapshot name must fit */ 1855cdf5b4caSmmusante if (dsl_dir_namelen(ds->ds_dir) + 1 + strlen(newsnapname) >= MAXNAMELEN) 1856cdf5b4caSmmusante err = ENAMETOOLONG; 1857cdf5b4caSmmusante 18581d452cf5Sahrens return (err); 18591d452cf5Sahrens } 1860fa9e4066Sahrens 18611d452cf5Sahrens static void 1862ecd6cf80Smarks dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, 1863ecd6cf80Smarks cred_t *cr, dmu_tx_t *tx) 18641d452cf5Sahrens { 18651d452cf5Sahrens dsl_dataset_t *ds = arg1; 1866ecd6cf80Smarks const char *newsnapname = arg2; 18671d452cf5Sahrens dsl_dir_t *dd = ds->ds_dir; 18681d452cf5Sahrens objset_t *mos = dd->dd_pool->dp_meta_objset; 18691d452cf5Sahrens dsl_dataset_t *hds; 18701d452cf5Sahrens int err; 1871fa9e4066Sahrens 18721d452cf5Sahrens ASSERT(ds->ds_phys->ds_next_snap_obj != 0); 1873fa9e4066Sahrens 18741d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, 18751d452cf5Sahrens dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds)); 1876fa9e4066Sahrens 18771d452cf5Sahrens VERIFY(0 == dsl_dataset_get_snapname(ds)); 18781d452cf5Sahrens err = zap_remove(mos, hds->ds_phys->ds_snapnames_zapobj, 18791d452cf5Sahrens ds->ds_snapname, tx); 1880fa9e4066Sahrens ASSERT3U(err, ==, 0); 18811d452cf5Sahrens mutex_enter(&ds->ds_lock); 18821d452cf5Sahrens (void) strcpy(ds->ds_snapname, newsnapname); 18831d452cf5Sahrens mutex_exit(&ds->ds_lock); 18841d452cf5Sahrens err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj, 18851d452cf5Sahrens ds->ds_snapname, 8, 1, &ds->ds_object, tx); 1886fa9e4066Sahrens ASSERT3U(err, ==, 0); 1887fa9e4066Sahrens 1888ecd6cf80Smarks spa_history_internal_log(LOG_DS_RENAME, dd->dd_pool->dp_spa, tx, 1889ecd6cf80Smarks cr, "dataset = %llu", ds->ds_object); 18901d452cf5Sahrens dsl_dataset_close(hds, DS_MODE_NONE, FTAG); 1891fa9e4066Sahrens } 1892fa9e4066Sahrens 1893f18faf3fSek struct renamesnaparg { 1894cdf5b4caSmmusante dsl_sync_task_group_t *dstg; 1895cdf5b4caSmmusante char failed[MAXPATHLEN]; 1896cdf5b4caSmmusante char *oldsnap; 1897cdf5b4caSmmusante char *newsnap; 1898cdf5b4caSmmusante }; 1899cdf5b4caSmmusante 1900cdf5b4caSmmusante static int 1901cdf5b4caSmmusante dsl_snapshot_rename_one(char *name, void *arg) 1902cdf5b4caSmmusante { 1903f18faf3fSek struct renamesnaparg *ra = arg; 1904cdf5b4caSmmusante dsl_dataset_t *ds = NULL; 1905cdf5b4caSmmusante char *cp; 1906cdf5b4caSmmusante int err; 1907cdf5b4caSmmusante 1908cdf5b4caSmmusante cp = name + strlen(name); 1909cdf5b4caSmmusante *cp = '@'; 1910cdf5b4caSmmusante (void) strcpy(cp + 1, ra->oldsnap); 1911ecd6cf80Smarks 1912ecd6cf80Smarks /* 1913ecd6cf80Smarks * For recursive snapshot renames the parent won't be changing 1914ecd6cf80Smarks * so we just pass name for both the to/from argument. 1915ecd6cf80Smarks */ 1916ecd6cf80Smarks if (err = zfs_secpolicy_rename_perms(name, name, CRED())) { 1917ecd6cf80Smarks (void) strcpy(ra->failed, name); 1918ecd6cf80Smarks return (err); 1919ecd6cf80Smarks } 1920ecd6cf80Smarks 1921cdf5b4caSmmusante err = dsl_dataset_open(name, DS_MODE_READONLY | DS_MODE_STANDARD, 1922cdf5b4caSmmusante ra->dstg, &ds); 1923cdf5b4caSmmusante if (err == ENOENT) { 1924cdf5b4caSmmusante *cp = '\0'; 1925cdf5b4caSmmusante return (0); 1926cdf5b4caSmmusante } 1927cdf5b4caSmmusante if (err) { 1928cdf5b4caSmmusante (void) strcpy(ra->failed, name); 1929cdf5b4caSmmusante *cp = '\0'; 1930cdf5b4caSmmusante dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); 1931cdf5b4caSmmusante return (err); 1932cdf5b4caSmmusante } 1933cdf5b4caSmmusante 1934cdf5b4caSmmusante #ifdef _KERNEL 1935cdf5b4caSmmusante /* for all filesystems undergoing rename, we'll need to unmount it */ 1936cdf5b4caSmmusante (void) zfs_unmount_snap(name, NULL); 1937cdf5b4caSmmusante #endif 1938cdf5b4caSmmusante 1939cdf5b4caSmmusante *cp = '\0'; 1940cdf5b4caSmmusante 1941cdf5b4caSmmusante dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check, 1942cdf5b4caSmmusante dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0); 1943cdf5b4caSmmusante 1944cdf5b4caSmmusante return (0); 1945cdf5b4caSmmusante } 1946cdf5b4caSmmusante 1947cdf5b4caSmmusante static int 1948cdf5b4caSmmusante dsl_recursive_rename(char *oldname, const char *newname) 1949cdf5b4caSmmusante { 1950cdf5b4caSmmusante int err; 1951f18faf3fSek struct renamesnaparg *ra; 1952cdf5b4caSmmusante dsl_sync_task_t *dst; 1953cdf5b4caSmmusante spa_t *spa; 1954cdf5b4caSmmusante char *cp, *fsname = spa_strdup(oldname); 1955cdf5b4caSmmusante int len = strlen(oldname); 1956cdf5b4caSmmusante 1957cdf5b4caSmmusante /* truncate the snapshot name to get the fsname */ 1958cdf5b4caSmmusante cp = strchr(fsname, '@'); 1959cdf5b4caSmmusante *cp = '\0'; 1960cdf5b4caSmmusante 196140feaa91Sahrens err = spa_open(fsname, &spa, FTAG); 1962cdf5b4caSmmusante if (err) { 1963cdf5b4caSmmusante kmem_free(fsname, len + 1); 1964cdf5b4caSmmusante return (err); 1965cdf5b4caSmmusante } 1966f18faf3fSek ra = kmem_alloc(sizeof (struct renamesnaparg), KM_SLEEP); 1967cdf5b4caSmmusante ra->dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); 1968cdf5b4caSmmusante 1969cdf5b4caSmmusante ra->oldsnap = strchr(oldname, '@') + 1; 1970cdf5b4caSmmusante ra->newsnap = strchr(newname, '@') + 1; 1971cdf5b4caSmmusante *ra->failed = '\0'; 1972cdf5b4caSmmusante 1973cdf5b4caSmmusante err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra, 1974cdf5b4caSmmusante DS_FIND_CHILDREN); 1975cdf5b4caSmmusante kmem_free(fsname, len + 1); 1976cdf5b4caSmmusante 1977cdf5b4caSmmusante if (err == 0) { 1978cdf5b4caSmmusante err = dsl_sync_task_group_wait(ra->dstg); 1979cdf5b4caSmmusante } 1980cdf5b4caSmmusante 1981cdf5b4caSmmusante for (dst = list_head(&ra->dstg->dstg_tasks); dst; 1982cdf5b4caSmmusante dst = list_next(&ra->dstg->dstg_tasks, dst)) { 1983cdf5b4caSmmusante dsl_dataset_t *ds = dst->dst_arg1; 1984cdf5b4caSmmusante if (dst->dst_err) { 1985cdf5b4caSmmusante dsl_dir_name(ds->ds_dir, ra->failed); 19862572aa4eSmmusante (void) strcat(ra->failed, "@"); 19872572aa4eSmmusante (void) strcat(ra->failed, ra->newsnap); 1988cdf5b4caSmmusante } 1989cdf5b4caSmmusante dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); 1990cdf5b4caSmmusante } 1991cdf5b4caSmmusante 1992ecd6cf80Smarks if (err) 1993ecd6cf80Smarks (void) strcpy(oldname, ra->failed); 1994cdf5b4caSmmusante 1995cdf5b4caSmmusante dsl_sync_task_group_destroy(ra->dstg); 1996f18faf3fSek kmem_free(ra, sizeof (struct renamesnaparg)); 1997cdf5b4caSmmusante spa_close(spa, FTAG); 1998cdf5b4caSmmusante return (err); 1999cdf5b4caSmmusante } 2000cdf5b4caSmmusante 20013a5a36beSmmusante static int 20023a5a36beSmmusante dsl_valid_rename(char *oldname, void *arg) 20033a5a36beSmmusante { 20043a5a36beSmmusante int delta = *(int *)arg; 20053a5a36beSmmusante 20063a5a36beSmmusante if (strlen(oldname) + delta >= MAXNAMELEN) 20073a5a36beSmmusante return (ENAMETOOLONG); 20083a5a36beSmmusante 20093a5a36beSmmusante return (0); 20103a5a36beSmmusante } 20113a5a36beSmmusante 2012fa9e4066Sahrens #pragma weak dmu_objset_rename = dsl_dataset_rename 2013fa9e4066Sahrens int 2014cdf5b4caSmmusante dsl_dataset_rename(char *oldname, const char *newname, 2015cdf5b4caSmmusante boolean_t recursive) 2016fa9e4066Sahrens { 2017fa9e4066Sahrens dsl_dir_t *dd; 20181d452cf5Sahrens dsl_dataset_t *ds; 2019fa9e4066Sahrens const char *tail; 2020fa9e4066Sahrens int err; 2021fa9e4066Sahrens 20221d452cf5Sahrens err = dsl_dir_open(oldname, FTAG, &dd, &tail); 2023ea8dc4b6Seschrock if (err) 2024ea8dc4b6Seschrock return (err); 2025fa9e4066Sahrens if (tail == NULL) { 20263a5a36beSmmusante int delta = strlen(newname) - strlen(oldname); 20273a5a36beSmmusante 20283a5a36beSmmusante /* if we're growing, validate child size lengths */ 20293a5a36beSmmusante if (delta > 0) 20303a5a36beSmmusante err = dmu_objset_find(oldname, dsl_valid_rename, 20313a5a36beSmmusante &delta, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS); 20323a5a36beSmmusante 20333a5a36beSmmusante if (!err) 20343a5a36beSmmusante err = dsl_dir_rename(dd, newname); 2035fa9e4066Sahrens dsl_dir_close(dd, FTAG); 2036fa9e4066Sahrens return (err); 2037fa9e4066Sahrens } 2038fa9e4066Sahrens if (tail[0] != '@') { 2039fa9e4066Sahrens /* the name ended in a nonexistant component */ 2040fa9e4066Sahrens dsl_dir_close(dd, FTAG); 2041fa9e4066Sahrens return (ENOENT); 2042fa9e4066Sahrens } 2043fa9e4066Sahrens 2044fa9e4066Sahrens dsl_dir_close(dd, FTAG); 20451d452cf5Sahrens 20461d452cf5Sahrens /* new name must be snapshot in same filesystem */ 20471d452cf5Sahrens tail = strchr(newname, '@'); 20481d452cf5Sahrens if (tail == NULL) 20491d452cf5Sahrens return (EINVAL); 20501d452cf5Sahrens tail++; 20511d452cf5Sahrens if (strncmp(oldname, newname, tail - newname) != 0) 20521d452cf5Sahrens return (EXDEV); 20531d452cf5Sahrens 2054cdf5b4caSmmusante if (recursive) { 2055cdf5b4caSmmusante err = dsl_recursive_rename(oldname, newname); 2056cdf5b4caSmmusante } else { 2057cdf5b4caSmmusante err = dsl_dataset_open(oldname, 2058cdf5b4caSmmusante DS_MODE_READONLY | DS_MODE_STANDARD, FTAG, &ds); 2059cdf5b4caSmmusante if (err) 2060cdf5b4caSmmusante return (err); 20611d452cf5Sahrens 2062cdf5b4caSmmusante err = dsl_sync_task_do(ds->ds_dir->dd_pool, 2063cdf5b4caSmmusante dsl_dataset_snapshot_rename_check, 2064cdf5b4caSmmusante dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1); 20651d452cf5Sahrens 2066cdf5b4caSmmusante dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); 2067cdf5b4caSmmusante } 20681d452cf5Sahrens 2069fa9e4066Sahrens return (err); 2070fa9e4066Sahrens } 207199653d4eSeschrock 20721d452cf5Sahrens struct promotearg { 20731d452cf5Sahrens uint64_t used, comp, uncomp, unique; 20741d452cf5Sahrens uint64_t newnext_obj, snapnames_obj; 20751d452cf5Sahrens }; 20761d452cf5Sahrens 2077ecd6cf80Smarks /* ARGSUSED */ 207899653d4eSeschrock static int 20791d452cf5Sahrens dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx) 208099653d4eSeschrock { 20811d452cf5Sahrens dsl_dataset_t *hds = arg1; 20821d452cf5Sahrens struct promotearg *pa = arg2; 20831d452cf5Sahrens dsl_dir_t *dd = hds->ds_dir; 20841d452cf5Sahrens dsl_pool_t *dp = hds->ds_dir->dd_pool; 20853cb34c60Sahrens dsl_dir_t *odd = NULL; 208699653d4eSeschrock dsl_dataset_t *ds = NULL; 20873cb34c60Sahrens dsl_dataset_t *origin_ds = NULL; 208899653d4eSeschrock dsl_dataset_t *newnext_ds = NULL; 208999653d4eSeschrock int err; 209099653d4eSeschrock char *name = NULL; 20911d452cf5Sahrens uint64_t itor = 0; 209299653d4eSeschrock blkptr_t bp; 209399653d4eSeschrock 20941d452cf5Sahrens bzero(pa, sizeof (*pa)); 20951d452cf5Sahrens 209699653d4eSeschrock /* Check that it is a clone */ 20973cb34c60Sahrens if (dd->dd_phys->dd_origin_obj == 0) 209899653d4eSeschrock return (EINVAL); 209999653d4eSeschrock 21001d452cf5Sahrens /* Since this is so expensive, don't do the preliminary check */ 21011d452cf5Sahrens if (!dmu_tx_is_syncing(tx)) 21021d452cf5Sahrens return (0); 21031d452cf5Sahrens 21043cb34c60Sahrens if (err = dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, 21053cb34c60Sahrens NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)) 210699653d4eSeschrock goto out; 21073cb34c60Sahrens odd = origin_ds->ds_dir; 21081d452cf5Sahrens 21091d452cf5Sahrens { 21101d452cf5Sahrens dsl_dataset_t *phds; 21111d452cf5Sahrens if (err = dsl_dataset_open_obj(dd->dd_pool, 21123cb34c60Sahrens odd->dd_phys->dd_head_dataset_obj, 21131d452cf5Sahrens NULL, DS_MODE_NONE, FTAG, &phds)) 21141d452cf5Sahrens goto out; 21151d452cf5Sahrens pa->snapnames_obj = phds->ds_phys->ds_snapnames_zapobj; 21161d452cf5Sahrens dsl_dataset_close(phds, DS_MODE_NONE, FTAG); 21171d452cf5Sahrens } 211899653d4eSeschrock 211999653d4eSeschrock if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE) { 212099653d4eSeschrock err = EXDEV; 212199653d4eSeschrock goto out; 212299653d4eSeschrock } 212399653d4eSeschrock 21243cb34c60Sahrens /* find origin's new next ds */ 212599653d4eSeschrock VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, hds->ds_object, 212699653d4eSeschrock NULL, DS_MODE_NONE, FTAG, &newnext_ds)); 21273cb34c60Sahrens while (newnext_ds->ds_phys->ds_prev_snap_obj != origin_ds->ds_object) { 212899653d4eSeschrock dsl_dataset_t *prev; 212999653d4eSeschrock 213099653d4eSeschrock if (err = dsl_dataset_open_obj(dd->dd_pool, 21311d452cf5Sahrens newnext_ds->ds_phys->ds_prev_snap_obj, 21321d452cf5Sahrens NULL, DS_MODE_NONE, FTAG, &prev)) 213399653d4eSeschrock goto out; 213499653d4eSeschrock dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); 213599653d4eSeschrock newnext_ds = prev; 213699653d4eSeschrock } 21371d452cf5Sahrens pa->newnext_obj = newnext_ds->ds_object; 213899653d4eSeschrock 21393cb34c60Sahrens /* compute origin's new unique space */ 214099653d4eSeschrock while ((err = bplist_iterate(&newnext_ds->ds_deadlist, 214199653d4eSeschrock &itor, &bp)) == 0) { 21423cb34c60Sahrens if (bp.blk_birth > origin_ds->ds_phys->ds_prev_snap_txg) 21431d452cf5Sahrens pa->unique += bp_get_dasize(dd->dd_pool->dp_spa, &bp); 214499653d4eSeschrock } 214599653d4eSeschrock if (err != ENOENT) 214699653d4eSeschrock goto out; 214799653d4eSeschrock 214899653d4eSeschrock /* Walk the snapshots that we are moving */ 214999653d4eSeschrock name = kmem_alloc(MAXPATHLEN, KM_SLEEP); 21503cb34c60Sahrens ds = origin_ds; 215199653d4eSeschrock /* CONSTCOND */ 215299653d4eSeschrock while (TRUE) { 215399653d4eSeschrock uint64_t val, dlused, dlcomp, dluncomp; 215499653d4eSeschrock dsl_dataset_t *prev; 215599653d4eSeschrock 215699653d4eSeschrock /* Check that the snapshot name does not conflict */ 215799653d4eSeschrock dsl_dataset_name(ds, name); 215899653d4eSeschrock err = zap_lookup(dd->dd_pool->dp_meta_objset, 215999653d4eSeschrock hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, 216099653d4eSeschrock 8, 1, &val); 216199653d4eSeschrock if (err != ENOENT) { 216299653d4eSeschrock if (err == 0) 216399653d4eSeschrock err = EEXIST; 216499653d4eSeschrock goto out; 216599653d4eSeschrock } 216699653d4eSeschrock 216799653d4eSeschrock /* 216899653d4eSeschrock * compute space to transfer. Each snapshot gave birth to: 216999653d4eSeschrock * (my used) - (prev's used) + (deadlist's used) 217099653d4eSeschrock */ 21711d452cf5Sahrens pa->used += ds->ds_phys->ds_used_bytes; 21721d452cf5Sahrens pa->comp += ds->ds_phys->ds_compressed_bytes; 21731d452cf5Sahrens pa->uncomp += ds->ds_phys->ds_uncompressed_bytes; 217499653d4eSeschrock 217599653d4eSeschrock /* If we reach the first snapshot, we're done. */ 217699653d4eSeschrock if (ds->ds_phys->ds_prev_snap_obj == 0) 217799653d4eSeschrock break; 217899653d4eSeschrock 217999653d4eSeschrock if (err = bplist_space(&ds->ds_deadlist, 218099653d4eSeschrock &dlused, &dlcomp, &dluncomp)) 218199653d4eSeschrock goto out; 218299653d4eSeschrock if (err = dsl_dataset_open_obj(dd->dd_pool, 218399653d4eSeschrock ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, 218499653d4eSeschrock FTAG, &prev)) 218599653d4eSeschrock goto out; 21861d452cf5Sahrens pa->used += dlused - prev->ds_phys->ds_used_bytes; 21871d452cf5Sahrens pa->comp += dlcomp - prev->ds_phys->ds_compressed_bytes; 21881d452cf5Sahrens pa->uncomp += dluncomp - prev->ds_phys->ds_uncompressed_bytes; 218999653d4eSeschrock 219099653d4eSeschrock /* 219199653d4eSeschrock * We could be a clone of a clone. If we reach our 219299653d4eSeschrock * parent's branch point, we're done. 219399653d4eSeschrock */ 219499653d4eSeschrock if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { 219599653d4eSeschrock dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); 219699653d4eSeschrock break; 219799653d4eSeschrock } 21983cb34c60Sahrens if (ds != origin_ds) 219999653d4eSeschrock dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 220099653d4eSeschrock ds = prev; 220199653d4eSeschrock } 220299653d4eSeschrock 220399653d4eSeschrock /* Check that there is enough space here */ 22043cb34c60Sahrens err = dsl_dir_transfer_possible(odd, dd, pa->used); 22051d452cf5Sahrens 22061d452cf5Sahrens out: 22073cb34c60Sahrens if (ds && ds != origin_ds) 22081d452cf5Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 22093cb34c60Sahrens if (origin_ds) 22103cb34c60Sahrens dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); 22111d452cf5Sahrens if (newnext_ds) 22121d452cf5Sahrens dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); 22131d452cf5Sahrens if (name) 22141d452cf5Sahrens kmem_free(name, MAXPATHLEN); 22151d452cf5Sahrens return (err); 22161d452cf5Sahrens } 221799653d4eSeschrock 22181d452cf5Sahrens static void 2219ecd6cf80Smarks dsl_dataset_promote_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) 22201d452cf5Sahrens { 22211d452cf5Sahrens dsl_dataset_t *hds = arg1; 22221d452cf5Sahrens struct promotearg *pa = arg2; 22231d452cf5Sahrens dsl_dir_t *dd = hds->ds_dir; 22241d452cf5Sahrens dsl_pool_t *dp = hds->ds_dir->dd_pool; 22253cb34c60Sahrens dsl_dir_t *odd = NULL; 22263cb34c60Sahrens dsl_dataset_t *ds, *origin_ds; 22271d452cf5Sahrens char *name; 22281d452cf5Sahrens 22293cb34c60Sahrens ASSERT(dd->dd_phys->dd_origin_obj != 0); 22301d452cf5Sahrens ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)); 22311d452cf5Sahrens 22323cb34c60Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, 22333cb34c60Sahrens NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)); 22340b69c2f0Sahrens /* 22353cb34c60Sahrens * We need to explicitly open odd, since origin_ds's dd will be 22360b69c2f0Sahrens * changing. 22370b69c2f0Sahrens */ 22383cb34c60Sahrens VERIFY(0 == dsl_dir_open_obj(dp, origin_ds->ds_dir->dd_object, 22393cb34c60Sahrens NULL, FTAG, &odd)); 224099653d4eSeschrock 224199653d4eSeschrock /* move snapshots to this dir */ 22421d452cf5Sahrens name = kmem_alloc(MAXPATHLEN, KM_SLEEP); 22433cb34c60Sahrens ds = origin_ds; 224499653d4eSeschrock /* CONSTCOND */ 224599653d4eSeschrock while (TRUE) { 224699653d4eSeschrock dsl_dataset_t *prev; 224799653d4eSeschrock 224899653d4eSeschrock /* move snap name entry */ 224999653d4eSeschrock dsl_dataset_name(ds, name); 22501d452cf5Sahrens VERIFY(0 == zap_remove(dp->dp_meta_objset, 22511d452cf5Sahrens pa->snapnames_obj, ds->ds_snapname, tx)); 22521d452cf5Sahrens VERIFY(0 == zap_add(dp->dp_meta_objset, 225399653d4eSeschrock hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, 225499653d4eSeschrock 8, 1, &ds->ds_object, tx)); 225599653d4eSeschrock 225699653d4eSeschrock /* change containing dsl_dir */ 225799653d4eSeschrock dmu_buf_will_dirty(ds->ds_dbuf, tx); 22583cb34c60Sahrens ASSERT3U(ds->ds_phys->ds_dir_obj, ==, odd->dd_object); 225999653d4eSeschrock ds->ds_phys->ds_dir_obj = dd->dd_object; 22603cb34c60Sahrens ASSERT3P(ds->ds_dir, ==, odd); 226199653d4eSeschrock dsl_dir_close(ds->ds_dir, ds); 22621d452cf5Sahrens VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, 226399653d4eSeschrock NULL, ds, &ds->ds_dir)); 226499653d4eSeschrock 226599653d4eSeschrock ASSERT3U(dsl_prop_numcb(ds), ==, 0); 226699653d4eSeschrock 226799653d4eSeschrock if (ds->ds_phys->ds_prev_snap_obj == 0) 226899653d4eSeschrock break; 226999653d4eSeschrock 22701d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dp, 227199653d4eSeschrock ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, 227299653d4eSeschrock FTAG, &prev)); 227399653d4eSeschrock 227499653d4eSeschrock if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { 227599653d4eSeschrock dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); 227699653d4eSeschrock break; 227799653d4eSeschrock } 22783cb34c60Sahrens if (ds != origin_ds) 227999653d4eSeschrock dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 228099653d4eSeschrock ds = prev; 228199653d4eSeschrock } 22823cb34c60Sahrens if (ds != origin_ds) 22831d452cf5Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); 228499653d4eSeschrock 22853cb34c60Sahrens /* change origin's next snap */ 22863cb34c60Sahrens dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); 22873cb34c60Sahrens origin_ds->ds_phys->ds_next_snap_obj = pa->newnext_obj; 228899653d4eSeschrock 22893cb34c60Sahrens /* change origin */ 229099653d4eSeschrock dmu_buf_will_dirty(dd->dd_dbuf, tx); 22913cb34c60Sahrens ASSERT3U(dd->dd_phys->dd_origin_obj, ==, origin_ds->ds_object); 22923cb34c60Sahrens dd->dd_phys->dd_origin_obj = odd->dd_phys->dd_origin_obj; 22933cb34c60Sahrens dmu_buf_will_dirty(odd->dd_dbuf, tx); 22943cb34c60Sahrens odd->dd_phys->dd_origin_obj = origin_ds->ds_object; 229599653d4eSeschrock 229699653d4eSeschrock /* change space accounting */ 22973cb34c60Sahrens dsl_dir_diduse_space(odd, -pa->used, -pa->comp, -pa->uncomp, tx); 22981d452cf5Sahrens dsl_dir_diduse_space(dd, pa->used, pa->comp, pa->uncomp, tx); 22993cb34c60Sahrens origin_ds->ds_phys->ds_unique_bytes = pa->unique; 230099653d4eSeschrock 2301ecd6cf80Smarks /* log history record */ 2302ecd6cf80Smarks spa_history_internal_log(LOG_DS_PROMOTE, dd->dd_pool->dp_spa, tx, 2303ecd6cf80Smarks cr, "dataset = %llu", ds->ds_object); 2304ecd6cf80Smarks 23053cb34c60Sahrens dsl_dir_close(odd, FTAG); 23063cb34c60Sahrens dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); 23071d452cf5Sahrens kmem_free(name, MAXPATHLEN); 230899653d4eSeschrock } 230999653d4eSeschrock 231099653d4eSeschrock int 231199653d4eSeschrock dsl_dataset_promote(const char *name) 231299653d4eSeschrock { 231399653d4eSeschrock dsl_dataset_t *ds; 231499653d4eSeschrock int err; 231599653d4eSeschrock dmu_object_info_t doi; 23161d452cf5Sahrens struct promotearg pa; 231799653d4eSeschrock 231899653d4eSeschrock err = dsl_dataset_open(name, DS_MODE_NONE, FTAG, &ds); 231999653d4eSeschrock if (err) 232099653d4eSeschrock return (err); 232199653d4eSeschrock 232299653d4eSeschrock err = dmu_object_info(ds->ds_dir->dd_pool->dp_meta_objset, 232399653d4eSeschrock ds->ds_phys->ds_snapnames_zapobj, &doi); 232499653d4eSeschrock if (err) { 232599653d4eSeschrock dsl_dataset_close(ds, DS_MODE_NONE, FTAG); 232699653d4eSeschrock return (err); 232799653d4eSeschrock } 232899653d4eSeschrock 232999653d4eSeschrock /* 233099653d4eSeschrock * Add in 128x the snapnames zapobj size, since we will be moving 233199653d4eSeschrock * a bunch of snapnames to the promoted ds, and dirtying their 233299653d4eSeschrock * bonus buffers. 233399653d4eSeschrock */ 23341d452cf5Sahrens err = dsl_sync_task_do(ds->ds_dir->dd_pool, 23351d452cf5Sahrens dsl_dataset_promote_check, 23361d452cf5Sahrens dsl_dataset_promote_sync, ds, &pa, 2 + 2 * doi.doi_physical_blks); 233799653d4eSeschrock dsl_dataset_close(ds, DS_MODE_NONE, FTAG); 233899653d4eSeschrock return (err); 233999653d4eSeschrock } 2340b1b8ab34Slling 23413cb34c60Sahrens struct cloneswaparg { 23423cb34c60Sahrens dsl_dataset_t *cds; /* clone dataset */ 23433cb34c60Sahrens dsl_dataset_t *ohds; /* origin's head dataset */ 23443cb34c60Sahrens boolean_t force; 2345a9b821a0Sck int64_t unused_refres_delta; /* change in unconsumed refreservation */ 23463cb34c60Sahrens }; 2347f18faf3fSek 2348f18faf3fSek /* ARGSUSED */ 2349f18faf3fSek static int 2350f18faf3fSek dsl_dataset_clone_swap_check(void *arg1, void *arg2, dmu_tx_t *tx) 2351f18faf3fSek { 23523cb34c60Sahrens struct cloneswaparg *csa = arg1; 2353f18faf3fSek 23543cb34c60Sahrens /* they should both be heads */ 23553cb34c60Sahrens if (dsl_dataset_is_snapshot(csa->cds) || 23563cb34c60Sahrens dsl_dataset_is_snapshot(csa->ohds)) 2357f18faf3fSek return (EINVAL); 2358f18faf3fSek 23593cb34c60Sahrens /* the branch point should be just before them */ 23603cb34c60Sahrens if (csa->cds->ds_prev != csa->ohds->ds_prev) 2361f18faf3fSek return (EINVAL); 2362f18faf3fSek 23633cb34c60Sahrens /* cds should be the clone */ 23643cb34c60Sahrens if (csa->cds->ds_prev->ds_phys->ds_next_snap_obj != 23653cb34c60Sahrens csa->ohds->ds_object) 23663cb34c60Sahrens return (EINVAL); 2367f18faf3fSek 23683cb34c60Sahrens /* the clone should be a child of the origin */ 23693cb34c60Sahrens if (csa->cds->ds_dir->dd_parent != csa->ohds->ds_dir) 23703cb34c60Sahrens return (EINVAL); 2371f18faf3fSek 23723cb34c60Sahrens /* ohds shouldn't be modified unless 'force' */ 23733cb34c60Sahrens if (!csa->force && dsl_dataset_modified_since_lastsnap(csa->ohds)) 23743cb34c60Sahrens return (ETXTBSY); 2375a9b821a0Sck 2376a9b821a0Sck /* adjust amount of any unconsumed refreservation */ 2377a9b821a0Sck csa->unused_refres_delta = 2378a9b821a0Sck (int64_t)MIN(csa->ohds->ds_reserved, 2379a9b821a0Sck csa->ohds->ds_phys->ds_unique_bytes) - 2380a9b821a0Sck (int64_t)MIN(csa->ohds->ds_reserved, 2381a9b821a0Sck csa->cds->ds_phys->ds_unique_bytes); 2382a9b821a0Sck 2383a9b821a0Sck if (csa->unused_refres_delta > 0 && 2384a9b821a0Sck csa->unused_refres_delta > 2385a9b821a0Sck dsl_dir_space_available(csa->ohds->ds_dir, NULL, 0, TRUE)) 2386a9b821a0Sck return (ENOSPC); 2387a9b821a0Sck 23883cb34c60Sahrens return (0); 2389f18faf3fSek } 2390f18faf3fSek 2391f18faf3fSek /* ARGSUSED */ 2392f18faf3fSek static void 2393f18faf3fSek dsl_dataset_clone_swap_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) 2394f18faf3fSek { 23953cb34c60Sahrens struct cloneswaparg *csa = arg1; 23963cb34c60Sahrens dsl_pool_t *dp = csa->cds->ds_dir->dd_pool; 2397f18faf3fSek uint64_t itor = 0; 2398f18faf3fSek blkptr_t bp; 2399f18faf3fSek uint64_t unique = 0; 2400f18faf3fSek int err; 2401f18faf3fSek 2402a9b821a0Sck ASSERT(csa->cds->ds_reserved == 0); 2403a9b821a0Sck ASSERT(csa->cds->ds_quota == csa->ohds->ds_quota); 2404a9b821a0Sck 24053cb34c60Sahrens dmu_buf_will_dirty(csa->cds->ds_dbuf, tx); 24063cb34c60Sahrens dmu_buf_will_dirty(csa->ohds->ds_dbuf, tx); 24073cb34c60Sahrens dmu_buf_will_dirty(csa->cds->ds_prev->ds_dbuf, tx); 2408f18faf3fSek 24093cb34c60Sahrens if (csa->cds->ds_user_ptr != NULL) { 24103cb34c60Sahrens csa->cds->ds_user_evict_func(csa->cds, csa->cds->ds_user_ptr); 24113cb34c60Sahrens csa->cds->ds_user_ptr = NULL; 24123cb34c60Sahrens } 2413f18faf3fSek 24143cb34c60Sahrens if (csa->ohds->ds_user_ptr != NULL) { 24153cb34c60Sahrens csa->ohds->ds_user_evict_func(csa->ohds, 24163cb34c60Sahrens csa->ohds->ds_user_ptr); 24173cb34c60Sahrens csa->ohds->ds_user_ptr = NULL; 24183cb34c60Sahrens } 2419f18faf3fSek 2420f18faf3fSek /* compute unique space */ 24213cb34c60Sahrens while ((err = bplist_iterate(&csa->cds->ds_deadlist, 24223cb34c60Sahrens &itor, &bp)) == 0) { 24233cb34c60Sahrens if (bp.blk_birth > csa->cds->ds_prev->ds_phys->ds_prev_snap_txg) 24243cb34c60Sahrens unique += bp_get_dasize(dp->dp_spa, &bp); 2425f18faf3fSek } 2426f18faf3fSek VERIFY(err == ENOENT); 2427f18faf3fSek 2428f18faf3fSek /* reset origin's unique bytes */ 24293cb34c60Sahrens csa->cds->ds_prev->ds_phys->ds_unique_bytes = unique; 2430f18faf3fSek 2431f18faf3fSek /* swap blkptrs */ 2432f18faf3fSek { 2433f18faf3fSek blkptr_t tmp; 24343cb34c60Sahrens tmp = csa->ohds->ds_phys->ds_bp; 24353cb34c60Sahrens csa->ohds->ds_phys->ds_bp = csa->cds->ds_phys->ds_bp; 24363cb34c60Sahrens csa->cds->ds_phys->ds_bp = tmp; 2437f18faf3fSek } 2438f18faf3fSek 2439f18faf3fSek /* set dd_*_bytes */ 2440f18faf3fSek { 2441f18faf3fSek int64_t dused, dcomp, duncomp; 2442f18faf3fSek uint64_t cdl_used, cdl_comp, cdl_uncomp; 2443f18faf3fSek uint64_t odl_used, odl_comp, odl_uncomp; 2444f18faf3fSek 24453cb34c60Sahrens VERIFY(0 == bplist_space(&csa->cds->ds_deadlist, &cdl_used, 2446f18faf3fSek &cdl_comp, &cdl_uncomp)); 24473cb34c60Sahrens VERIFY(0 == bplist_space(&csa->ohds->ds_deadlist, &odl_used, 2448f18faf3fSek &odl_comp, &odl_uncomp)); 24493cb34c60Sahrens dused = csa->cds->ds_phys->ds_used_bytes + cdl_used - 24503cb34c60Sahrens (csa->ohds->ds_phys->ds_used_bytes + odl_used); 24513cb34c60Sahrens dcomp = csa->cds->ds_phys->ds_compressed_bytes + cdl_comp - 24523cb34c60Sahrens (csa->ohds->ds_phys->ds_compressed_bytes + odl_comp); 24533cb34c60Sahrens duncomp = csa->cds->ds_phys->ds_uncompressed_bytes + 24543cb34c60Sahrens cdl_uncomp - 24553cb34c60Sahrens (csa->ohds->ds_phys->ds_uncompressed_bytes + odl_uncomp); 24563cb34c60Sahrens 24573cb34c60Sahrens dsl_dir_diduse_space(csa->ohds->ds_dir, 24583cb34c60Sahrens dused, dcomp, duncomp, tx); 24593cb34c60Sahrens dsl_dir_diduse_space(csa->cds->ds_dir, 24603cb34c60Sahrens -dused, -dcomp, -duncomp, tx); 24613cb34c60Sahrens } 24623cb34c60Sahrens 24633cb34c60Sahrens #define SWITCH64(x, y) \ 24643cb34c60Sahrens { \ 24653cb34c60Sahrens uint64_t __tmp = (x); \ 24663cb34c60Sahrens (x) = (y); \ 24673cb34c60Sahrens (y) = __tmp; \ 2468f18faf3fSek } 2469f18faf3fSek 2470f18faf3fSek /* swap ds_*_bytes */ 24713cb34c60Sahrens SWITCH64(csa->ohds->ds_phys->ds_used_bytes, 24723cb34c60Sahrens csa->cds->ds_phys->ds_used_bytes); 24733cb34c60Sahrens SWITCH64(csa->ohds->ds_phys->ds_compressed_bytes, 24743cb34c60Sahrens csa->cds->ds_phys->ds_compressed_bytes); 24753cb34c60Sahrens SWITCH64(csa->ohds->ds_phys->ds_uncompressed_bytes, 24763cb34c60Sahrens csa->cds->ds_phys->ds_uncompressed_bytes); 2477a9b821a0Sck SWITCH64(csa->ohds->ds_phys->ds_unique_bytes, 2478a9b821a0Sck csa->cds->ds_phys->ds_unique_bytes); 2479a9b821a0Sck 2480a9b821a0Sck /* apply any parent delta for change in unconsumed refreservation */ 2481a9b821a0Sck dsl_dir_diduse_space(csa->ohds->ds_dir, csa->unused_refres_delta, 2482a9b821a0Sck 0, 0, tx); 2483f18faf3fSek 2484f18faf3fSek /* swap deadlists */ 24853cb34c60Sahrens bplist_close(&csa->cds->ds_deadlist); 24863cb34c60Sahrens bplist_close(&csa->ohds->ds_deadlist); 24873cb34c60Sahrens SWITCH64(csa->ohds->ds_phys->ds_deadlist_obj, 24883cb34c60Sahrens csa->cds->ds_phys->ds_deadlist_obj); 24893cb34c60Sahrens VERIFY(0 == bplist_open(&csa->cds->ds_deadlist, dp->dp_meta_objset, 24903cb34c60Sahrens csa->cds->ds_phys->ds_deadlist_obj)); 24913cb34c60Sahrens VERIFY(0 == bplist_open(&csa->ohds->ds_deadlist, dp->dp_meta_objset, 24923cb34c60Sahrens csa->ohds->ds_phys->ds_deadlist_obj)); 2493f18faf3fSek } 2494f18faf3fSek 2495f18faf3fSek /* 2496a9b821a0Sck * Swap 'clone' with its origin head file system. 2497f18faf3fSek */ 2498f18faf3fSek int 24993cb34c60Sahrens dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, 25003cb34c60Sahrens boolean_t force) 2501f18faf3fSek { 25023cb34c60Sahrens struct cloneswaparg csa; 2503f18faf3fSek 25043cb34c60Sahrens ASSERT(clone->ds_open_refcount == DS_REF_MAX); 25053cb34c60Sahrens ASSERT(origin_head->ds_open_refcount == DS_REF_MAX); 2506f18faf3fSek 25073cb34c60Sahrens csa.cds = clone; 25083cb34c60Sahrens csa.ohds = origin_head; 25093cb34c60Sahrens csa.force = force; 25103cb34c60Sahrens return (dsl_sync_task_do(clone->ds_dir->dd_pool, 2511f18faf3fSek dsl_dataset_clone_swap_check, 25123cb34c60Sahrens dsl_dataset_clone_swap_sync, &csa, NULL, 9)); 2513f18faf3fSek } 2514f18faf3fSek 2515b1b8ab34Slling /* 2516b1b8ab34Slling * Given a pool name and a dataset object number in that pool, 2517b1b8ab34Slling * return the name of that dataset. 2518b1b8ab34Slling */ 2519b1b8ab34Slling int 2520b1b8ab34Slling dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) 2521b1b8ab34Slling { 2522b1b8ab34Slling spa_t *spa; 2523b1b8ab34Slling dsl_pool_t *dp; 2524b1b8ab34Slling dsl_dataset_t *ds = NULL; 2525b1b8ab34Slling int error; 2526b1b8ab34Slling 2527b1b8ab34Slling if ((error = spa_open(pname, &spa, FTAG)) != 0) 2528b1b8ab34Slling return (error); 2529b1b8ab34Slling dp = spa_get_dsl(spa); 2530b1b8ab34Slling rw_enter(&dp->dp_config_rwlock, RW_READER); 2531b1b8ab34Slling if ((error = dsl_dataset_open_obj(dp, obj, 2532b1b8ab34Slling NULL, DS_MODE_NONE, FTAG, &ds)) != 0) { 2533b1b8ab34Slling rw_exit(&dp->dp_config_rwlock); 2534b1b8ab34Slling spa_close(spa, FTAG); 2535b1b8ab34Slling return (error); 2536b1b8ab34Slling } 2537b1b8ab34Slling dsl_dataset_name(ds, buf); 2538b1b8ab34Slling dsl_dataset_close(ds, DS_MODE_NONE, FTAG); 2539b1b8ab34Slling rw_exit(&dp->dp_config_rwlock); 2540b1b8ab34Slling spa_close(spa, FTAG); 2541b1b8ab34Slling 2542b1b8ab34Slling return (0); 2543b1b8ab34Slling } 2544a9799022Sck 2545a9799022Sck int 2546a9799022Sck dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, 2547a9799022Sck uint64_t asize, uint64_t inflight, uint64_t *used) 2548a9799022Sck { 2549a9799022Sck int error = 0; 2550a9799022Sck 2551a9799022Sck ASSERT3S(asize, >, 0); 2552a9799022Sck 2553a9799022Sck mutex_enter(&ds->ds_lock); 2554a9799022Sck /* 2555a9799022Sck * Make a space adjustment for reserved bytes. 2556a9799022Sck */ 2557a9799022Sck if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) { 2558a9799022Sck ASSERT3U(*used, >=, 2559a9799022Sck ds->ds_reserved - ds->ds_phys->ds_unique_bytes); 2560a9799022Sck *used -= (ds->ds_reserved - ds->ds_phys->ds_unique_bytes); 2561a9799022Sck } 2562a9799022Sck 2563a9799022Sck if (!check_quota || ds->ds_quota == 0) { 2564a9799022Sck mutex_exit(&ds->ds_lock); 2565a9799022Sck return (0); 2566a9799022Sck } 2567a9799022Sck /* 2568a9799022Sck * If they are requesting more space, and our current estimate 2569a9799022Sck * is over quota, they get to try again unless the actual 2570a9799022Sck * on-disk is over quota and there are no pending changes (which 2571a9799022Sck * may free up space for us). 2572a9799022Sck */ 2573a9799022Sck if (ds->ds_phys->ds_used_bytes + inflight >= ds->ds_quota) { 2574a9799022Sck if (inflight > 0 || ds->ds_phys->ds_used_bytes < ds->ds_quota) 2575a9799022Sck error = ERESTART; 2576a9799022Sck else 2577a9799022Sck error = EDQUOT; 2578a9799022Sck } 2579a9799022Sck mutex_exit(&ds->ds_lock); 2580a9799022Sck 2581a9799022Sck return (error); 2582a9799022Sck } 2583a9799022Sck 2584a9799022Sck /* ARGSUSED */ 2585a9799022Sck static int 2586a9799022Sck dsl_dataset_set_quota_check(void *arg1, void *arg2, dmu_tx_t *tx) 2587a9799022Sck { 2588a9799022Sck dsl_dataset_t *ds = arg1; 2589a9799022Sck uint64_t *quotap = arg2; 2590a9799022Sck uint64_t new_quota = *quotap; 2591a9799022Sck 2592a9799022Sck if (spa_version(ds->ds_dir->dd_pool->dp_spa) < SPA_VERSION_REFQUOTA) 2593a9799022Sck return (ENOTSUP); 2594a9799022Sck 2595a9799022Sck if (new_quota == 0) 2596a9799022Sck return (0); 2597a9799022Sck 2598a9799022Sck if (new_quota < ds->ds_phys->ds_used_bytes || 2599a9799022Sck new_quota < ds->ds_reserved) 2600a9799022Sck return (ENOSPC); 2601a9799022Sck 2602a9799022Sck return (0); 2603a9799022Sck } 2604a9799022Sck 2605a9799022Sck /* ARGSUSED */ 2606a9799022Sck void 2607a9799022Sck dsl_dataset_set_quota_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) 2608a9799022Sck { 2609a9799022Sck dsl_dataset_t *ds = arg1; 2610a9799022Sck uint64_t *quotap = arg2; 2611a9799022Sck uint64_t new_quota = *quotap; 2612a9799022Sck 2613a9799022Sck dmu_buf_will_dirty(ds->ds_dbuf, tx); 2614a9799022Sck 2615a9799022Sck mutex_enter(&ds->ds_lock); 2616a9799022Sck ds->ds_quota = new_quota; 2617a9799022Sck mutex_exit(&ds->ds_lock); 2618a9799022Sck 2619a9799022Sck dsl_prop_set_uint64_sync(ds->ds_dir, "refquota", new_quota, cr, tx); 2620a9799022Sck 2621a9799022Sck spa_history_internal_log(LOG_DS_REFQUOTA, ds->ds_dir->dd_pool->dp_spa, 2622a9799022Sck tx, cr, "%lld dataset = %llu ", 2623a9799022Sck (longlong_t)new_quota, ds->ds_dir->dd_phys->dd_head_dataset_obj); 2624a9799022Sck } 2625a9799022Sck 2626a9799022Sck int 2627a9799022Sck dsl_dataset_set_quota(const char *dsname, uint64_t quota) 2628a9799022Sck { 2629a9799022Sck dsl_dataset_t *ds; 2630a9799022Sck int err; 2631a9799022Sck 2632a9799022Sck err = dsl_dataset_open(dsname, DS_MODE_STANDARD, FTAG, &ds); 2633a9799022Sck if (err) 2634a9799022Sck return (err); 2635a9799022Sck 2636a9b821a0Sck if (quota != ds->ds_quota) { 2637a9b821a0Sck /* 2638a9b821a0Sck * If someone removes a file, then tries to set the quota, we 2639a9b821a0Sck * want to make sure the file freeing takes effect. 2640a9b821a0Sck */ 2641a9b821a0Sck txg_wait_open(ds->ds_dir->dd_pool, 0); 2642a9799022Sck 2643a9b821a0Sck err = dsl_sync_task_do(ds->ds_dir->dd_pool, 2644a9b821a0Sck dsl_dataset_set_quota_check, dsl_dataset_set_quota_sync, 2645a9b821a0Sck ds, "a, 0); 2646a9b821a0Sck } 2647a9799022Sck dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); 2648a9799022Sck return (err); 2649a9799022Sck } 2650a9799022Sck 2651a9799022Sck static int 2652a9799022Sck dsl_dataset_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx) 2653a9799022Sck { 2654a9799022Sck dsl_dataset_t *ds = arg1; 2655a9799022Sck uint64_t *reservationp = arg2; 2656a9799022Sck uint64_t new_reservation = *reservationp; 2657a9799022Sck int64_t delta; 2658a9799022Sck uint64_t unique; 2659a9799022Sck 2660a9799022Sck if (new_reservation > INT64_MAX) 2661a9799022Sck return (EOVERFLOW); 2662a9799022Sck 2663a9799022Sck if (spa_version(ds->ds_dir->dd_pool->dp_spa) < 2664a9799022Sck SPA_VERSION_REFRESERVATION) 2665a9799022Sck return (ENOTSUP); 2666a9799022Sck 2667a9799022Sck if (dsl_dataset_is_snapshot(ds)) 2668a9799022Sck return (EINVAL); 2669a9799022Sck 2670a9799022Sck /* 2671a9799022Sck * If we are doing the preliminary check in open context, the 2672a9799022Sck * space estimates may be inaccurate. 2673a9799022Sck */ 2674a9799022Sck if (!dmu_tx_is_syncing(tx)) 2675a9799022Sck return (0); 2676a9799022Sck 2677a9799022Sck mutex_enter(&ds->ds_lock); 2678a9799022Sck unique = dsl_dataset_unique(ds); 2679a9799022Sck delta = MAX(unique, new_reservation) - MAX(unique, ds->ds_reserved); 2680a9799022Sck mutex_exit(&ds->ds_lock); 2681a9799022Sck 2682a9799022Sck if (delta > 0 && 2683a9799022Sck delta > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) 2684a9799022Sck return (ENOSPC); 2685a9799022Sck if (delta > 0 && ds->ds_quota > 0 && 2686a9799022Sck new_reservation > ds->ds_quota) 2687a9799022Sck return (ENOSPC); 2688a9799022Sck 2689a9799022Sck return (0); 2690a9799022Sck } 2691a9799022Sck 2692a9799022Sck /* ARGSUSED */ 2693a9799022Sck static void 2694a9799022Sck dsl_dataset_set_reservation_sync(void *arg1, void *arg2, cred_t *cr, 2695a9799022Sck dmu_tx_t *tx) 2696a9799022Sck { 2697a9799022Sck dsl_dataset_t *ds = arg1; 2698a9799022Sck uint64_t *reservationp = arg2; 2699a9799022Sck uint64_t new_reservation = *reservationp; 2700a9799022Sck uint64_t unique; 2701a9799022Sck int64_t delta; 2702a9799022Sck 2703a9799022Sck dmu_buf_will_dirty(ds->ds_dbuf, tx); 2704a9799022Sck 2705a9799022Sck mutex_enter(&ds->ds_lock); 2706a9799022Sck unique = dsl_dataset_unique(ds); 2707a9799022Sck delta = MAX(0, (int64_t)(new_reservation - unique)) - 2708a9799022Sck MAX(0, (int64_t)(ds->ds_reserved - unique)); 2709a9799022Sck ds->ds_reserved = new_reservation; 2710a9799022Sck mutex_exit(&ds->ds_lock); 2711a9799022Sck 2712a9799022Sck dsl_prop_set_uint64_sync(ds->ds_dir, "refreservation", 2713a9799022Sck new_reservation, cr, tx); 2714a9799022Sck 2715a9799022Sck dsl_dir_diduse_space(ds->ds_dir, delta, 0, 0, tx); 2716a9799022Sck 2717a9799022Sck spa_history_internal_log(LOG_DS_REFRESERV, 2718a9799022Sck ds->ds_dir->dd_pool->dp_spa, tx, cr, "%lld dataset = %llu", 2719a9799022Sck (longlong_t)new_reservation, 2720a9799022Sck ds->ds_dir->dd_phys->dd_head_dataset_obj); 2721a9799022Sck } 2722a9799022Sck 2723a9799022Sck int 2724a9799022Sck dsl_dataset_set_reservation(const char *dsname, uint64_t reservation) 2725a9799022Sck { 2726a9799022Sck dsl_dataset_t *ds; 2727a9799022Sck int err; 2728a9799022Sck 2729a9799022Sck err = dsl_dataset_open(dsname, DS_MODE_STANDARD, FTAG, &ds); 2730a9799022Sck if (err) 2731a9799022Sck return (err); 2732a9799022Sck 2733a9799022Sck err = dsl_sync_task_do(ds->ds_dir->dd_pool, 2734a9799022Sck dsl_dataset_set_reservation_check, 2735a9799022Sck dsl_dataset_set_reservation_sync, ds, &reservation, 0); 2736a9799022Sck dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); 2737a9799022Sck return (err); 2738a9799022Sck } 2739