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 */ 211c17160aSKevin Crowe 22fa9e4066Sahrens /* 235afc78aaSChris Kirby * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24000cce6bSBrad Lewis * Copyright (c) 2011, 2017 by Delphix. All rights reserved. 25a2afb611SJerry Jelinek * Copyright (c) 2014, Joyent, Inc. All rights reserved. 2603d1795fSAlexander Stetsenko * Copyright (c) 2014 RackTop Systems. 27bc9014e6SJustin Gibbs * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 28c3d26abcSMatthew Ahrens * Copyright (c) 2014 Integros [integros.com] 295f7a8e6dSDan McDonald * Copyright 2016, OmniTI Computer Consulting, Inc. All rights reserved. 301c17160aSKevin Crowe * Copyright 2017 Nexenta Systems, Inc. 31fa9e4066Sahrens */ 32fa9e4066Sahrens 33fa9e4066Sahrens #include <sys/dmu_objset.h> 34fa9e4066Sahrens #include <sys/dsl_dataset.h> 35fa9e4066Sahrens #include <sys/dsl_dir.h> 3699653d4eSeschrock #include <sys/dsl_prop.h> 371d452cf5Sahrens #include <sys/dsl_synctask.h> 38fa9e4066Sahrens #include <sys/dmu_traverse.h> 394e3c9f44SBill Pijewski #include <sys/dmu_impl.h> 40fa9e4066Sahrens #include <sys/dmu_tx.h> 41fa9e4066Sahrens #include <sys/arc.h> 42fa9e4066Sahrens #include <sys/zio.h> 43fa9e4066Sahrens #include <sys/zap.h> 44ad135b5dSChristopher Siden #include <sys/zfeature.h> 45fa9e4066Sahrens #include <sys/unique.h> 46fa9e4066Sahrens #include <sys/zfs_context.h> 47cdf5b4caSmmusante #include <sys/zfs_ioctl.h> 48ecd6cf80Smarks #include <sys/spa.h> 4986714001SSerapheim Dimitropoulos #include <sys/spa_impl.h> 505cabbc6bSPrashanth Sreenivasa #include <sys/vdev.h> 51088f3894Sahrens #include <sys/zfs_znode.h> 52c99e4bdcSChris Kirby #include <sys/zfs_onexit.h> 53842727c2SChris Kirby #include <sys/zvol.h> 543f9d6ad7SLin Ling #include <sys/dsl_scan.h> 55cde58dbcSMatthew Ahrens #include <sys/dsl_deadlist.h> 563b2aab18SMatthew Ahrens #include <sys/dsl_destroy.h> 573b2aab18SMatthew Ahrens #include <sys/dsl_userhold.h> 5878f17100SMatthew Ahrens #include <sys/dsl_bookmark.h> 590fa1b3ccSPaul Dagnelie #include <sys/dmu_recv.h> 6045818ee1SMatthew Ahrens #include <sys/zio_checksum.h> 619c3fd121SMatthew Ahrens #include <sys/zio_compress.h> 629c3fd121SMatthew Ahrens #include <zfs_fletcher.h> 63e1930233Sbonwick 64b5152584SMatthew Ahrens /* 65b5152584SMatthew Ahrens * The SPA supports block sizes up to 16MB. However, very large blocks 66b5152584SMatthew Ahrens * can have an impact on i/o latency (e.g. tying up a spinning disk for 67b5152584SMatthew Ahrens * ~300ms), and also potentially on the memory allocator. Therefore, 68b5152584SMatthew Ahrens * we do not allow the recordsize to be set larger than zfs_max_recordsize 69b5152584SMatthew Ahrens * (default 1MB). Larger blocks can be created by changing this tunable, 70b5152584SMatthew Ahrens * and pools with larger blocks can always be imported and used, regardless 71b5152584SMatthew Ahrens * of this setting. 72b5152584SMatthew Ahrens */ 73b5152584SMatthew Ahrens int zfs_max_recordsize = 1 * 1024 * 1024; 74b5152584SMatthew Ahrens 75cde58dbcSMatthew Ahrens #define SWITCH64(x, y) \ 76cde58dbcSMatthew Ahrens { \ 77cde58dbcSMatthew Ahrens uint64_t __tmp = (x); \ 78cde58dbcSMatthew Ahrens (x) = (y); \ 79cde58dbcSMatthew Ahrens (y) = __tmp; \ 80cde58dbcSMatthew Ahrens } 81cde58dbcSMatthew Ahrens 8255434c77Sek #define DS_REF_MAX (1ULL << 62) 83fa9e4066Sahrens 84c1379625SJustin T. Gibbs extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); 85c1379625SJustin T. Gibbs 865cabbc6bSPrashanth Sreenivasa static void dsl_dataset_set_remap_deadlist_object(dsl_dataset_t *ds, 875cabbc6bSPrashanth Sreenivasa uint64_t obj, dmu_tx_t *tx); 885cabbc6bSPrashanth Sreenivasa static void dsl_dataset_unset_remap_deadlist_object(dsl_dataset_t *ds, 895cabbc6bSPrashanth Sreenivasa dmu_tx_t *tx); 905cabbc6bSPrashanth Sreenivasa 915f7a8e6dSDan McDonald extern int spa_asize_inflation; 925f7a8e6dSDan McDonald 93bfaed0b9SAndriy Gapon static zil_header_t zero_zil; 94bfaed0b9SAndriy Gapon 95a9799022Sck /* 96a9799022Sck * Figure out how much of this delta should be propogated to the dsl_dir 97a9799022Sck * layer. If there's a refreservation, that space has already been 98a9799022Sck * partially accounted for in our ancestors. 99a9799022Sck */ 100a9799022Sck static int64_t 101a9799022Sck parent_delta(dsl_dataset_t *ds, int64_t delta) 102a9799022Sck { 103c1379625SJustin T. Gibbs dsl_dataset_phys_t *ds_phys; 104a9799022Sck uint64_t old_bytes, new_bytes; 105a9799022Sck 106a9799022Sck if (ds->ds_reserved == 0) 107a9799022Sck return (delta); 108a9799022Sck 109c1379625SJustin T. Gibbs ds_phys = dsl_dataset_phys(ds); 110c1379625SJustin T. Gibbs old_bytes = MAX(ds_phys->ds_unique_bytes, ds->ds_reserved); 111c1379625SJustin T. Gibbs new_bytes = MAX(ds_phys->ds_unique_bytes + delta, ds->ds_reserved); 112a9799022Sck 113a9799022Sck ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); 114a9799022Sck return (new_bytes - old_bytes); 115a9799022Sck } 116fa9e4066Sahrens 117fa9e4066Sahrens void 118b24ab676SJeff Bonwick dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) 119fa9e4066Sahrens { 120b24ab676SJeff Bonwick int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp); 121fa9e4066Sahrens int compressed = BP_GET_PSIZE(bp); 122fa9e4066Sahrens int uncompressed = BP_GET_UCSIZE(bp); 123a9799022Sck int64_t delta; 124fa9e4066Sahrens 1253f9d6ad7SLin Ling dprintf_bp(bp, "ds=%p", ds); 126fa9e4066Sahrens 127fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 128fa9e4066Sahrens /* It could have been compressed away to nothing */ 129fa9e4066Sahrens if (BP_IS_HOLE(bp)) 130fa9e4066Sahrens return; 131fa9e4066Sahrens ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); 132ad135b5dSChristopher Siden ASSERT(DMU_OT_IS_VALID(BP_GET_TYPE(bp))); 133fa9e4066Sahrens if (ds == NULL) { 134ce636f8bSMatthew Ahrens dsl_pool_mos_diduse_space(tx->tx_pool, 135ce636f8bSMatthew Ahrens used, compressed, uncompressed); 136fa9e4066Sahrens return; 137fa9e4066Sahrens } 1383f9d6ad7SLin Ling 139bfaed0b9SAndriy Gapon ASSERT3U(bp->blk_birth, >, dsl_dataset_phys(ds)->ds_prev_snap_txg); 140b62969f8SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 141fa9e4066Sahrens mutex_enter(&ds->ds_lock); 142a9799022Sck delta = parent_delta(ds, used); 143c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes += used; 144c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; 145c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; 146c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes += used; 14745818ee1SMatthew Ahrens 148ca0cc391SMatthew Ahrens if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) { 149ca0cc391SMatthew Ahrens ds->ds_feature_activation_needed[SPA_FEATURE_LARGE_BLOCKS] = 150ca0cc391SMatthew Ahrens B_TRUE; 151ca0cc391SMatthew Ahrens } 15245818ee1SMatthew Ahrens 15345818ee1SMatthew Ahrens spa_feature_t f = zio_checksum_to_feature(BP_GET_CHECKSUM(bp)); 15445818ee1SMatthew Ahrens if (f != SPA_FEATURE_NONE) 15545818ee1SMatthew Ahrens ds->ds_feature_activation_needed[f] = B_TRUE; 15645818ee1SMatthew Ahrens 157fa9e4066Sahrens mutex_exit(&ds->ds_lock); 15874e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, 15974e7dc98SMatthew Ahrens compressed, uncompressed, tx); 16074e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, used - delta, 16174e7dc98SMatthew Ahrens DD_USED_REFRSRV, DD_USED_HEAD, tx); 162fa9e4066Sahrens } 163fa9e4066Sahrens 1645cabbc6bSPrashanth Sreenivasa /* 1655cabbc6bSPrashanth Sreenivasa * Called when the specified segment has been remapped, and is thus no 1665cabbc6bSPrashanth Sreenivasa * longer referenced in the head dataset. The vdev must be indirect. 1675cabbc6bSPrashanth Sreenivasa * 1685cabbc6bSPrashanth Sreenivasa * If the segment is referenced by a snapshot, put it on the remap deadlist. 1695cabbc6bSPrashanth Sreenivasa * Otherwise, add this segment to the obsolete spacemap. 1705cabbc6bSPrashanth Sreenivasa */ 1715cabbc6bSPrashanth Sreenivasa void 1725cabbc6bSPrashanth Sreenivasa dsl_dataset_block_remapped(dsl_dataset_t *ds, uint64_t vdev, uint64_t offset, 1735cabbc6bSPrashanth Sreenivasa uint64_t size, uint64_t birth, dmu_tx_t *tx) 1745cabbc6bSPrashanth Sreenivasa { 1755cabbc6bSPrashanth Sreenivasa spa_t *spa = ds->ds_dir->dd_pool->dp_spa; 1765cabbc6bSPrashanth Sreenivasa 1775cabbc6bSPrashanth Sreenivasa ASSERT(dmu_tx_is_syncing(tx)); 1785cabbc6bSPrashanth Sreenivasa ASSERT(birth <= tx->tx_txg); 1795cabbc6bSPrashanth Sreenivasa ASSERT(!ds->ds_is_snapshot); 1805cabbc6bSPrashanth Sreenivasa 1815cabbc6bSPrashanth Sreenivasa if (birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { 1825cabbc6bSPrashanth Sreenivasa spa_vdev_indirect_mark_obsolete(spa, vdev, offset, size, tx); 1835cabbc6bSPrashanth Sreenivasa } else { 1845cabbc6bSPrashanth Sreenivasa blkptr_t fakebp; 1855cabbc6bSPrashanth Sreenivasa dva_t *dva = &fakebp.blk_dva[0]; 1865cabbc6bSPrashanth Sreenivasa 1875cabbc6bSPrashanth Sreenivasa ASSERT(ds != NULL); 1885cabbc6bSPrashanth Sreenivasa 1895cabbc6bSPrashanth Sreenivasa mutex_enter(&ds->ds_remap_deadlist_lock); 1905cabbc6bSPrashanth Sreenivasa if (!dsl_dataset_remap_deadlist_exists(ds)) { 1915cabbc6bSPrashanth Sreenivasa dsl_dataset_create_remap_deadlist(ds, tx); 1925cabbc6bSPrashanth Sreenivasa } 1935cabbc6bSPrashanth Sreenivasa mutex_exit(&ds->ds_remap_deadlist_lock); 1945cabbc6bSPrashanth Sreenivasa 1955cabbc6bSPrashanth Sreenivasa BP_ZERO(&fakebp); 1965cabbc6bSPrashanth Sreenivasa fakebp.blk_birth = birth; 1975cabbc6bSPrashanth Sreenivasa DVA_SET_VDEV(dva, vdev); 1985cabbc6bSPrashanth Sreenivasa DVA_SET_OFFSET(dva, offset); 1995cabbc6bSPrashanth Sreenivasa DVA_SET_ASIZE(dva, size); 2005cabbc6bSPrashanth Sreenivasa 2015cabbc6bSPrashanth Sreenivasa dsl_deadlist_insert(&ds->ds_remap_deadlist, &fakebp, tx); 2025cabbc6bSPrashanth Sreenivasa } 2035cabbc6bSPrashanth Sreenivasa } 2045cabbc6bSPrashanth Sreenivasa 205cdb0ab79Smaybee int 206b24ab676SJeff Bonwick dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx, 207b24ab676SJeff Bonwick boolean_t async) 208fa9e4066Sahrens { 20986714001SSerapheim Dimitropoulos spa_t *spa = dmu_tx_pool(tx)->dp_spa; 21086714001SSerapheim Dimitropoulos 21186714001SSerapheim Dimitropoulos int used = bp_get_dsize_sync(spa, bp); 21243466aaeSMax Grossman int compressed = BP_GET_PSIZE(bp); 21343466aaeSMax Grossman int uncompressed = BP_GET_UCSIZE(bp); 21443466aaeSMax Grossman 215fa9e4066Sahrens if (BP_IS_HOLE(bp)) 216cdb0ab79Smaybee return (0); 217fa9e4066Sahrens 218b24ab676SJeff Bonwick ASSERT(dmu_tx_is_syncing(tx)); 219b24ab676SJeff Bonwick ASSERT(bp->blk_birth <= tx->tx_txg); 220b24ab676SJeff Bonwick 221fa9e4066Sahrens if (ds == NULL) { 222b24ab676SJeff Bonwick dsl_free(tx->tx_pool, tx->tx_txg, bp); 223ce636f8bSMatthew Ahrens dsl_pool_mos_diduse_space(tx->tx_pool, 224ce636f8bSMatthew Ahrens -used, -compressed, -uncompressed); 225cdb0ab79Smaybee return (used); 226fa9e4066Sahrens } 227fa9e4066Sahrens ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); 228fa9e4066Sahrens 229bc9014e6SJustin Gibbs ASSERT(!ds->ds_is_snapshot); 230fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 231fa9e4066Sahrens 232c1379625SJustin T. Gibbs if (bp->blk_birth > dsl_dataset_phys(ds)->ds_prev_snap_txg) { 233a9799022Sck int64_t delta; 234c717a561Smaybee 2353f9d6ad7SLin Ling dprintf_bp(bp, "freeing ds=%llu", ds->ds_object); 236b24ab676SJeff Bonwick dsl_free(tx->tx_pool, tx->tx_txg, bp); 237fa9e4066Sahrens 238fa9e4066Sahrens mutex_enter(&ds->ds_lock); 239c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_unique_bytes >= used || 240a9799022Sck !DS_UNIQUE_IS_ACCURATE(ds)); 241a9799022Sck delta = parent_delta(ds, -used); 242c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes -= used; 243fa9e4066Sahrens mutex_exit(&ds->ds_lock); 24474e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, 245a9799022Sck delta, -compressed, -uncompressed, tx); 24674e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, -used - delta, 24774e7dc98SMatthew Ahrens DD_USED_REFRSRV, DD_USED_HEAD, tx); 248fa9e4066Sahrens } else { 249fa9e4066Sahrens dprintf_bp(bp, "putting on dead list: %s", ""); 250b24ab676SJeff Bonwick if (async) { 251b24ab676SJeff Bonwick /* 252b24ab676SJeff Bonwick * We are here as part of zio's write done callback, 253b24ab676SJeff Bonwick * which means we're a zio interrupt thread. We can't 254cde58dbcSMatthew Ahrens * call dsl_deadlist_insert() now because it may block 255b24ab676SJeff Bonwick * waiting for I/O. Instead, put bp on the deferred 256b24ab676SJeff Bonwick * queue and let dsl_pool_sync() finish the job. 257b24ab676SJeff Bonwick */ 258cde58dbcSMatthew Ahrens bplist_append(&ds->ds_pending_deadlist, bp); 259b24ab676SJeff Bonwick } else { 260cde58dbcSMatthew Ahrens dsl_deadlist_insert(&ds->ds_deadlist, bp, tx); 261b24ab676SJeff Bonwick } 262a4611edeSahrens ASSERT3U(ds->ds_prev->ds_object, ==, 263c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj); 264c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_num_children > 0); 265fa9e4066Sahrens /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ 266c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 267a4611edeSahrens ds->ds_object && bp->blk_birth > 268c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_prev_snap_txg) { 269a4611edeSahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 270a4611edeSahrens mutex_enter(&ds->ds_prev->ds_lock); 271c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_unique_bytes += used; 272a4611edeSahrens mutex_exit(&ds->ds_prev->ds_lock); 273fa9e4066Sahrens } 2743f9d6ad7SLin Ling if (bp->blk_birth > ds->ds_dir->dd_origin_txg) { 27574e7dc98SMatthew Ahrens dsl_dir_transfer_space(ds->ds_dir, used, 27674e7dc98SMatthew Ahrens DD_USED_HEAD, DD_USED_SNAP, tx); 27774e7dc98SMatthew Ahrens } 278fa9e4066Sahrens } 279fa9e4066Sahrens mutex_enter(&ds->ds_lock); 280c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_referenced_bytes, >=, used); 281c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes -= used; 282c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_compressed_bytes, >=, compressed); 283c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_compressed_bytes -= compressed; 284c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_uncompressed_bytes, >=, uncompressed); 285c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes -= uncompressed; 286fa9e4066Sahrens mutex_exit(&ds->ds_lock); 287cdb0ab79Smaybee 288cdb0ab79Smaybee return (used); 289fa9e4066Sahrens } 290fa9e4066Sahrens 29140510e8eSJosef 'Jeff' Sipek /* 29240510e8eSJosef 'Jeff' Sipek * We have to release the fsid syncronously or we risk that a subsequent 29340510e8eSJosef 'Jeff' Sipek * mount of the same dataset will fail to unique_insert the fsid. This 29440510e8eSJosef 'Jeff' Sipek * failure would manifest itself as the fsid of this dataset changing 29540510e8eSJosef 'Jeff' Sipek * between mounts which makes NFS clients quite unhappy. 29640510e8eSJosef 'Jeff' Sipek */ 297fa9e4066Sahrens static void 29840510e8eSJosef 'Jeff' Sipek dsl_dataset_evict_sync(void *dbu) 299fa9e4066Sahrens { 300bc9014e6SJustin Gibbs dsl_dataset_t *ds = dbu; 301fa9e4066Sahrens 3023b2aab18SMatthew Ahrens ASSERT(ds->ds_owner == NULL); 303fa9e4066Sahrens 30491ebeef5Sahrens unique_remove(ds->ds_fsid_guid); 30540510e8eSJosef 'Jeff' Sipek } 30640510e8eSJosef 'Jeff' Sipek 30740510e8eSJosef 'Jeff' Sipek static void 30840510e8eSJosef 'Jeff' Sipek dsl_dataset_evict_async(void *dbu) 30940510e8eSJosef 'Jeff' Sipek { 31040510e8eSJosef 'Jeff' Sipek dsl_dataset_t *ds = dbu; 31140510e8eSJosef 'Jeff' Sipek 31240510e8eSJosef 'Jeff' Sipek ASSERT(ds->ds_owner == NULL); 31340510e8eSJosef 'Jeff' Sipek 31440510e8eSJosef 'Jeff' Sipek ds->ds_dbuf = NULL; 315fa9e4066Sahrens 316503ad85cSMatthew Ahrens if (ds->ds_objset != NULL) 317503ad85cSMatthew Ahrens dmu_objset_evict(ds->ds_objset); 318fa9e4066Sahrens 319fa9e4066Sahrens if (ds->ds_prev) { 3203b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 321fa9e4066Sahrens ds->ds_prev = NULL; 322fa9e4066Sahrens } 323fa9e4066Sahrens 324cde58dbcSMatthew Ahrens bplist_destroy(&ds->ds_pending_deadlist); 3255cabbc6bSPrashanth Sreenivasa if (dsl_deadlist_is_open(&ds->ds_deadlist)) 326cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 3275cabbc6bSPrashanth Sreenivasa if (dsl_deadlist_is_open(&ds->ds_remap_deadlist)) 3285cabbc6bSPrashanth Sreenivasa dsl_deadlist_close(&ds->ds_remap_deadlist); 329745cd3c5Smaybee if (ds->ds_dir) 330bc9014e6SJustin Gibbs dsl_dir_async_rele(ds->ds_dir, ds); 331fa9e4066Sahrens 33291ebeef5Sahrens ASSERT(!list_link_active(&ds->ds_synced_link)); 333fa9e4066Sahrens 33403bad06fSJustin Gibbs list_destroy(&ds->ds_prop_cbs); 3355ad82045Snd mutex_destroy(&ds->ds_lock); 33691ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 337d2b3cbbdSJorgen Lundman mutex_destroy(&ds->ds_sendstream_lock); 3385cabbc6bSPrashanth Sreenivasa mutex_destroy(&ds->ds_remap_deadlist_lock); 339e914ace2STim Schumacher zfs_refcount_destroy(&ds->ds_longholds); 340c166b69dSPaul Dagnelie rrw_destroy(&ds->ds_bp_rwlock); 3415ad82045Snd 342fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 343fa9e4066Sahrens } 344fa9e4066Sahrens 3453b2aab18SMatthew Ahrens int 346fa9e4066Sahrens dsl_dataset_get_snapname(dsl_dataset_t *ds) 347fa9e4066Sahrens { 348fa9e4066Sahrens dsl_dataset_phys_t *headphys; 349fa9e4066Sahrens int err; 350fa9e4066Sahrens dmu_buf_t *headdbuf; 351fa9e4066Sahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 352fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 353fa9e4066Sahrens 354fa9e4066Sahrens if (ds->ds_snapname[0]) 355ea8dc4b6Seschrock return (0); 356c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_snap_obj == 0) 357ea8dc4b6Seschrock return (0); 358fa9e4066Sahrens 359c1379625SJustin T. Gibbs err = dmu_bonus_hold(mos, dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, 360ea8dc4b6Seschrock FTAG, &headdbuf); 3613b2aab18SMatthew Ahrens if (err != 0) 362ea8dc4b6Seschrock return (err); 363fa9e4066Sahrens headphys = headdbuf->db_data; 364fa9e4066Sahrens err = zap_value_search(dp->dp_meta_objset, 365e7437265Sahrens headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); 366ea8dc4b6Seschrock dmu_buf_rele(headdbuf, FTAG); 367ea8dc4b6Seschrock return (err); 368fa9e4066Sahrens } 369fa9e4066Sahrens 3703b2aab18SMatthew Ahrens int 371745cd3c5Smaybee dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) 372ab04eb8eStimh { 373745cd3c5Smaybee objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 374c1379625SJustin T. Gibbs uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 3751c17160aSKevin Crowe matchtype_t mt = 0; 376ab04eb8eStimh int err; 377ab04eb8eStimh 378c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) 3791c17160aSKevin Crowe mt = MT_NORMALIZE; 380ab04eb8eStimh 381745cd3c5Smaybee err = zap_lookup_norm(mos, snapobj, name, 8, 1, 382ab04eb8eStimh value, mt, NULL, 0, NULL); 3831c17160aSKevin Crowe if (err == ENOTSUP && (mt & MT_NORMALIZE)) 384745cd3c5Smaybee err = zap_lookup(mos, snapobj, name, 8, 1, value); 385ab04eb8eStimh return (err); 386ab04eb8eStimh } 387ab04eb8eStimh 3883b2aab18SMatthew Ahrens int 389a2afb611SJerry Jelinek dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, 390a2afb611SJerry Jelinek boolean_t adj_cnt) 391ab04eb8eStimh { 392745cd3c5Smaybee objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 393c1379625SJustin T. Gibbs uint64_t snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj; 3941c17160aSKevin Crowe matchtype_t mt = 0; 395ab04eb8eStimh int err; 396ab04eb8eStimh 39771eb0538SChris Kirby dsl_dir_snap_cmtime_update(ds->ds_dir); 39871eb0538SChris Kirby 399c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) 4001c17160aSKevin Crowe mt = MT_NORMALIZE; 401ab04eb8eStimh 402745cd3c5Smaybee err = zap_remove_norm(mos, snapobj, name, mt, tx); 4031c17160aSKevin Crowe if (err == ENOTSUP && (mt & MT_NORMALIZE)) 404745cd3c5Smaybee err = zap_remove(mos, snapobj, name, tx); 405a2afb611SJerry Jelinek 406a2afb611SJerry Jelinek if (err == 0 && adj_cnt) 407a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(ds->ds_dir, -1, 408a2afb611SJerry Jelinek DD_FIELD_SNAPSHOT_COUNT, tx); 409a2afb611SJerry Jelinek 410ab04eb8eStimh return (err); 411ab04eb8eStimh } 412ab04eb8eStimh 413e57a022bSJustin T. Gibbs boolean_t 414e57a022bSJustin T. Gibbs dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) 415e57a022bSJustin T. Gibbs { 4169d47dec0SJustin T. Gibbs dmu_buf_t *dbuf = ds->ds_dbuf; 4179d47dec0SJustin T. Gibbs boolean_t result = B_FALSE; 4189d47dec0SJustin T. Gibbs 4199d47dec0SJustin T. Gibbs if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, 4209d47dec0SJustin T. Gibbs ds->ds_object, DMU_BONUS_BLKID, tag)) { 4219d47dec0SJustin T. Gibbs 4229d47dec0SJustin T. Gibbs if (ds == dmu_buf_get_user(dbuf)) 4239d47dec0SJustin T. Gibbs result = B_TRUE; 4249d47dec0SJustin T. Gibbs else 4259d47dec0SJustin T. Gibbs dmu_buf_rele(dbuf, tag); 4269d47dec0SJustin T. Gibbs } 4279d47dec0SJustin T. Gibbs 4289d47dec0SJustin T. Gibbs return (result); 429e57a022bSJustin T. Gibbs } 430e57a022bSJustin T. Gibbs 4313b2aab18SMatthew Ahrens int 4323b2aab18SMatthew Ahrens dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, 433745cd3c5Smaybee dsl_dataset_t **dsp) 434fa9e4066Sahrens { 435fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 436fa9e4066Sahrens dmu_buf_t *dbuf; 437fa9e4066Sahrens dsl_dataset_t *ds; 438ea8dc4b6Seschrock int err; 439a7f53a56SChris Kirby dmu_object_info_t doi; 440fa9e4066Sahrens 4413b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 442fa9e4066Sahrens 443ea8dc4b6Seschrock err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); 4443b2aab18SMatthew Ahrens if (err != 0) 445ea8dc4b6Seschrock return (err); 446a7f53a56SChris Kirby 447a7f53a56SChris Kirby /* Make sure dsobj has the correct object type. */ 448a7f53a56SChris Kirby dmu_object_info_from_db(dbuf, &doi); 4492acef22dSMatthew Ahrens if (doi.doi_bonus_type != DMU_OT_DSL_DATASET) { 450b287be1bSWill Andrews dmu_buf_rele(dbuf, tag); 451be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 452b287be1bSWill Andrews } 453a7f53a56SChris Kirby 454fa9e4066Sahrens ds = dmu_buf_get_user(dbuf); 455fa9e4066Sahrens if (ds == NULL) { 456d5285caeSGeorge Wilson dsl_dataset_t *winner = NULL; 457fa9e4066Sahrens 458fa9e4066Sahrens ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); 459fa9e4066Sahrens ds->ds_dbuf = dbuf; 460fa9e4066Sahrens ds->ds_object = dsobj; 461bc9014e6SJustin Gibbs ds->ds_is_snapshot = dsl_dataset_phys(ds)->ds_num_children != 0; 462fa9e4066Sahrens 4635cabbc6bSPrashanth Sreenivasa err = dsl_dir_hold_obj(dp, dsl_dataset_phys(ds)->ds_dir_obj, 4645cabbc6bSPrashanth Sreenivasa NULL, ds, &ds->ds_dir); 4655cabbc6bSPrashanth Sreenivasa if (err != 0) { 4665cabbc6bSPrashanth Sreenivasa kmem_free(ds, sizeof (dsl_dataset_t)); 4675cabbc6bSPrashanth Sreenivasa dmu_buf_rele(dbuf, tag); 4685cabbc6bSPrashanth Sreenivasa return (err); 4695cabbc6bSPrashanth Sreenivasa } 4705cabbc6bSPrashanth Sreenivasa 4715ad82045Snd mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); 47291ebeef5Sahrens mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); 4734e3c9f44SBill Pijewski mutex_init(&ds->ds_sendstream_lock, NULL, MUTEX_DEFAULT, NULL); 4745cabbc6bSPrashanth Sreenivasa mutex_init(&ds->ds_remap_deadlist_lock, 4755cabbc6bSPrashanth Sreenivasa NULL, MUTEX_DEFAULT, NULL); 476c166b69dSPaul Dagnelie rrw_init(&ds->ds_bp_rwlock, B_FALSE); 477e914ace2STim Schumacher zfs_refcount_create(&ds->ds_longholds); 4785ad82045Snd 479cde58dbcSMatthew Ahrens bplist_create(&ds->ds_pending_deadlist); 480cde58dbcSMatthew Ahrens 4814e3c9f44SBill Pijewski list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), 4824e3c9f44SBill Pijewski offsetof(dmu_sendarg_t, dsa_link)); 4834e3c9f44SBill Pijewski 48403bad06fSJustin Gibbs list_create(&ds->ds_prop_cbs, sizeof (dsl_prop_cb_record_t), 48503bad06fSJustin Gibbs offsetof(dsl_prop_cb_record_t, cbr_ds_node)); 48603bad06fSJustin Gibbs 487b5152584SMatthew Ahrens if (doi.doi_type == DMU_OTN_ZAP_METADATA) { 488ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 489ca0cc391SMatthew Ahrens if (!(spa_feature_table[f].fi_flags & 490ca0cc391SMatthew Ahrens ZFEATURE_FLAG_PER_DATASET)) 491ca0cc391SMatthew Ahrens continue; 492ca0cc391SMatthew Ahrens err = zap_contains(mos, dsobj, 493ca0cc391SMatthew Ahrens spa_feature_table[f].fi_guid); 494ca0cc391SMatthew Ahrens if (err == 0) { 495ca0cc391SMatthew Ahrens ds->ds_feature_inuse[f] = B_TRUE; 496ca0cc391SMatthew Ahrens } else { 497ca0cc391SMatthew Ahrens ASSERT3U(err, ==, ENOENT); 498ca0cc391SMatthew Ahrens err = 0; 499ca0cc391SMatthew Ahrens } 500e1f3c208SJustin T. Gibbs } 501b5152584SMatthew Ahrens } 502b5152584SMatthew Ahrens 503bc9014e6SJustin Gibbs if (!ds->ds_is_snapshot) { 504fa9e4066Sahrens ds->ds_snapname[0] = '\0'; 505c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { 5063b2aab18SMatthew Ahrens err = dsl_dataset_hold_obj(dp, 507c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, 508745cd3c5Smaybee ds, &ds->ds_prev); 509fa9e4066Sahrens } 51078f17100SMatthew Ahrens if (doi.doi_type == DMU_OTN_ZAP_METADATA) { 51178f17100SMatthew Ahrens int zaperr = zap_lookup(mos, ds->ds_object, 51278f17100SMatthew Ahrens DS_FIELD_BOOKMARK_NAMES, 51378f17100SMatthew Ahrens sizeof (ds->ds_bookmarks), 1, 51478f17100SMatthew Ahrens &ds->ds_bookmarks); 51578f17100SMatthew Ahrens if (zaperr != ENOENT) 51678f17100SMatthew Ahrens VERIFY0(zaperr); 51778f17100SMatthew Ahrens } 518842727c2SChris Kirby } else { 519842727c2SChris Kirby if (zfs_flags & ZFS_DEBUG_SNAPNAMES) 520842727c2SChris Kirby err = dsl_dataset_get_snapname(ds); 521c1379625SJustin T. Gibbs if (err == 0 && 522c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_userrefs_obj != 0) { 523842727c2SChris Kirby err = zap_count( 524842727c2SChris Kirby ds->ds_dir->dd_pool->dp_meta_objset, 525c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_userrefs_obj, 526842727c2SChris Kirby &ds->ds_userrefs); 527842727c2SChris Kirby } 528fa9e4066Sahrens } 529fa9e4066Sahrens 530bc9014e6SJustin Gibbs if (err == 0 && !ds->ds_is_snapshot) { 5313b2aab18SMatthew Ahrens err = dsl_prop_get_int_ds(ds, 5323b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 5333b2aab18SMatthew Ahrens &ds->ds_reserved); 534cb625fb5Sck if (err == 0) { 5353b2aab18SMatthew Ahrens err = dsl_prop_get_int_ds(ds, 5363b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 5373b2aab18SMatthew Ahrens &ds->ds_quota); 538cb625fb5Sck } 539cb625fb5Sck } else { 540cb625fb5Sck ds->ds_reserved = ds->ds_quota = 0; 541cb625fb5Sck } 542cb625fb5Sck 543*eb633035STom Caputi if (err == 0 && ds->ds_dir->dd_crypto_obj != 0 && 544*eb633035STom Caputi ds->ds_is_snapshot && 545*eb633035STom Caputi zap_contains(mos, dsobj, DS_FIELD_IVSET_GUID) != 0) { 546*eb633035STom Caputi dp->dp_spa->spa_errata = 547*eb633035STom Caputi ZPOOL_ERRATA_ZOL_8308_ENCRYPTION; 548*eb633035STom Caputi } 549*eb633035STom Caputi 5505cabbc6bSPrashanth Sreenivasa dsl_deadlist_open(&ds->ds_deadlist, 5515cabbc6bSPrashanth Sreenivasa mos, dsl_dataset_phys(ds)->ds_deadlist_obj); 5525cabbc6bSPrashanth Sreenivasa uint64_t remap_deadlist_obj = 5535cabbc6bSPrashanth Sreenivasa dsl_dataset_get_remap_deadlist_object(ds); 5545cabbc6bSPrashanth Sreenivasa if (remap_deadlist_obj != 0) { 5555cabbc6bSPrashanth Sreenivasa dsl_deadlist_open(&ds->ds_remap_deadlist, mos, 5565cabbc6bSPrashanth Sreenivasa remap_deadlist_obj); 5575cabbc6bSPrashanth Sreenivasa } 5585cabbc6bSPrashanth Sreenivasa 55940510e8eSJosef 'Jeff' Sipek dmu_buf_init_user(&ds->ds_dbu, dsl_dataset_evict_sync, 56040510e8eSJosef 'Jeff' Sipek dsl_dataset_evict_async, &ds->ds_dbuf); 561bc9014e6SJustin Gibbs if (err == 0) 562bc9014e6SJustin Gibbs winner = dmu_buf_set_user_ie(dbuf, &ds->ds_dbu); 563bc9014e6SJustin Gibbs 564bc9014e6SJustin Gibbs if (err != 0 || winner != NULL) { 565cde58dbcSMatthew Ahrens bplist_destroy(&ds->ds_pending_deadlist); 566cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 5675cabbc6bSPrashanth Sreenivasa if (dsl_deadlist_is_open(&ds->ds_remap_deadlist)) 5685cabbc6bSPrashanth Sreenivasa dsl_deadlist_close(&ds->ds_remap_deadlist); 569745cd3c5Smaybee if (ds->ds_prev) 5703b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 5713b2aab18SMatthew Ahrens dsl_dir_rele(ds->ds_dir, ds); 572ad027c0fSJorgen Lundman list_destroy(&ds->ds_prop_cbs); 573ad027c0fSJorgen Lundman list_destroy(&ds->ds_sendstreams); 5745ad82045Snd mutex_destroy(&ds->ds_lock); 57591ebeef5Sahrens mutex_destroy(&ds->ds_opening_lock); 576d2b3cbbdSJorgen Lundman mutex_destroy(&ds->ds_sendstream_lock); 577ad027c0fSJorgen Lundman mutex_destroy(&ds->ds_remap_deadlist_lock); 578e914ace2STim Schumacher zfs_refcount_destroy(&ds->ds_longholds); 579ad027c0fSJorgen Lundman rrw_destroy(&ds->ds_bp_rwlock); 580fa9e4066Sahrens kmem_free(ds, sizeof (dsl_dataset_t)); 5813b2aab18SMatthew Ahrens if (err != 0) { 582ea8dc4b6Seschrock dmu_buf_rele(dbuf, tag); 583ea8dc4b6Seschrock return (err); 584ea8dc4b6Seschrock } 585fa9e4066Sahrens ds = winner; 586fa9e4066Sahrens } else { 58791ebeef5Sahrens ds->ds_fsid_guid = 588c1379625SJustin T. Gibbs unique_insert(dsl_dataset_phys(ds)->ds_fsid_guid); 58940510e8eSJosef 'Jeff' Sipek if (ds->ds_fsid_guid != 59040510e8eSJosef 'Jeff' Sipek dsl_dataset_phys(ds)->ds_fsid_guid) { 59140510e8eSJosef 'Jeff' Sipek zfs_dbgmsg("ds_fsid_guid changed from " 59240510e8eSJosef 'Jeff' Sipek "%llx to %llx for pool %s dataset id %llu", 59340510e8eSJosef 'Jeff' Sipek (long long) 59440510e8eSJosef 'Jeff' Sipek dsl_dataset_phys(ds)->ds_fsid_guid, 59540510e8eSJosef 'Jeff' Sipek (long long)ds->ds_fsid_guid, 59640510e8eSJosef 'Jeff' Sipek spa_name(dp->dp_spa), 59740510e8eSJosef 'Jeff' Sipek dsobj); 59840510e8eSJosef 'Jeff' Sipek } 599fa9e4066Sahrens } 600fa9e4066Sahrens } 601*eb633035STom Caputi 602fa9e4066Sahrens ASSERT3P(ds->ds_dbuf, ==, dbuf); 603c1379625SJustin T. Gibbs ASSERT3P(dsl_dataset_phys(ds), ==, dbuf->db_data); 604c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_prev_snap_obj != 0 || 605afc6333aSahrens spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || 60684db2a68Sahrens dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); 607ea8dc4b6Seschrock *dsp = ds; 608*eb633035STom Caputi 609ea8dc4b6Seschrock return (0); 610fa9e4066Sahrens } 611fa9e4066Sahrens 612745cd3c5Smaybee int 613*eb633035STom Caputi dsl_dataset_create_key_mapping(dsl_dataset_t *ds) 614*eb633035STom Caputi { 615*eb633035STom Caputi dsl_dir_t *dd = ds->ds_dir; 616*eb633035STom Caputi 617*eb633035STom Caputi if (dd->dd_crypto_obj == 0) 618*eb633035STom Caputi return (0); 619*eb633035STom Caputi 620*eb633035STom Caputi return (spa_keystore_create_mapping(dd->dd_pool->dp_spa, 621*eb633035STom Caputi ds, ds, &ds->ds_key_mapping)); 622*eb633035STom Caputi } 623*eb633035STom Caputi 624*eb633035STom Caputi int 625*eb633035STom Caputi dsl_dataset_hold_obj_flags(dsl_pool_t *dp, uint64_t dsobj, 626*eb633035STom Caputi ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp) 627*eb633035STom Caputi { 628*eb633035STom Caputi int err; 629*eb633035STom Caputi 630*eb633035STom Caputi err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp); 631*eb633035STom Caputi if (err != 0) 632*eb633035STom Caputi return (err); 633*eb633035STom Caputi 634*eb633035STom Caputi ASSERT3P(*dsp, !=, NULL); 635*eb633035STom Caputi 636*eb633035STom Caputi if (flags & DS_HOLD_FLAG_DECRYPT) { 637*eb633035STom Caputi err = dsl_dataset_create_key_mapping(*dsp); 638*eb633035STom Caputi if (err != 0) 639*eb633035STom Caputi dsl_dataset_rele(*dsp, tag); 640*eb633035STom Caputi } 641*eb633035STom Caputi 642*eb633035STom Caputi return (err); 643*eb633035STom Caputi } 644*eb633035STom Caputi 645*eb633035STom Caputi int 646*eb633035STom Caputi dsl_dataset_hold_flags(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags, 647503ad85cSMatthew Ahrens void *tag, dsl_dataset_t **dsp) 648fa9e4066Sahrens { 649fa9e4066Sahrens dsl_dir_t *dd; 650745cd3c5Smaybee const char *snapname; 651fa9e4066Sahrens uint64_t obj; 652fa9e4066Sahrens int err = 0; 653a2cdcdd2SPaul Dagnelie dsl_dataset_t *ds; 654fa9e4066Sahrens 6553b2aab18SMatthew Ahrens err = dsl_dir_hold(dp, name, FTAG, &dd, &snapname); 6563b2aab18SMatthew Ahrens if (err != 0) 657ea8dc4b6Seschrock return (err); 658fa9e4066Sahrens 6593b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 660c1379625SJustin T. Gibbs obj = dsl_dir_phys(dd)->dd_head_dataset_obj; 6613b2aab18SMatthew Ahrens if (obj != 0) 662*eb633035STom Caputi err = dsl_dataset_hold_obj_flags(dp, obj, flags, tag, &ds); 663745cd3c5Smaybee else 664be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 665fa9e4066Sahrens 666745cd3c5Smaybee /* we may be looking for a snapshot */ 667745cd3c5Smaybee if (err == 0 && snapname != NULL) { 668a2cdcdd2SPaul Dagnelie dsl_dataset_t *snap_ds; 669fa9e4066Sahrens 670745cd3c5Smaybee if (*snapname++ != '@') { 671*eb633035STom Caputi dsl_dataset_rele_flags(ds, flags, tag); 6723b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 673be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 674fa9e4066Sahrens } 675fa9e4066Sahrens 676745cd3c5Smaybee dprintf("looking for snapshot '%s'\n", snapname); 677a2cdcdd2SPaul Dagnelie err = dsl_dataset_snap_lookup(ds, snapname, &obj); 678*eb633035STom Caputi if (err == 0) { 679*eb633035STom Caputi err = dsl_dataset_hold_obj_flags(dp, obj, flags, tag, 680*eb633035STom Caputi &snap_ds); 681*eb633035STom Caputi } 682*eb633035STom Caputi dsl_dataset_rele_flags(ds, flags, tag); 683745cd3c5Smaybee 6843b2aab18SMatthew Ahrens if (err == 0) { 685a2cdcdd2SPaul Dagnelie mutex_enter(&snap_ds->ds_lock); 686a2cdcdd2SPaul Dagnelie if (snap_ds->ds_snapname[0] == 0) 687a2cdcdd2SPaul Dagnelie (void) strlcpy(snap_ds->ds_snapname, snapname, 688a2cdcdd2SPaul Dagnelie sizeof (snap_ds->ds_snapname)); 689a2cdcdd2SPaul Dagnelie mutex_exit(&snap_ds->ds_lock); 690a2cdcdd2SPaul Dagnelie ds = snap_ds; 691fa9e4066Sahrens } 692fa9e4066Sahrens } 693a2cdcdd2SPaul Dagnelie if (err == 0) 694a2cdcdd2SPaul Dagnelie *dsp = ds; 6953b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 696fa9e4066Sahrens return (err); 697fa9e4066Sahrens } 698fa9e4066Sahrens 699fa9e4066Sahrens int 700*eb633035STom Caputi dsl_dataset_hold(dsl_pool_t *dp, const char *name, void *tag, 701*eb633035STom Caputi dsl_dataset_t **dsp) 702*eb633035STom Caputi { 703*eb633035STom Caputi return (dsl_dataset_hold_flags(dp, name, 0, tag, dsp)); 704*eb633035STom Caputi } 705*eb633035STom Caputi 706*eb633035STom Caputi int 707*eb633035STom Caputi dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, ds_hold_flags_t flags, 7083b2aab18SMatthew Ahrens void *tag, dsl_dataset_t **dsp) 7093b2aab18SMatthew Ahrens { 710*eb633035STom Caputi int err = dsl_dataset_hold_obj_flags(dp, dsobj, flags, tag, dsp); 7113b2aab18SMatthew Ahrens if (err != 0) 7123b2aab18SMatthew Ahrens return (err); 7133b2aab18SMatthew Ahrens if (!dsl_dataset_tryown(*dsp, tag)) { 714*eb633035STom Caputi dsl_dataset_rele_flags(*dsp, flags, tag); 7153b2aab18SMatthew Ahrens *dsp = NULL; 716be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 7173b2aab18SMatthew Ahrens } 7183b2aab18SMatthew Ahrens return (0); 7193b2aab18SMatthew Ahrens } 7203b2aab18SMatthew Ahrens 7213b2aab18SMatthew Ahrens int 722*eb633035STom Caputi dsl_dataset_own(dsl_pool_t *dp, const char *name, ds_hold_flags_t flags, 723503ad85cSMatthew Ahrens void *tag, dsl_dataset_t **dsp) 724fa9e4066Sahrens { 725*eb633035STom Caputi int err = dsl_dataset_hold_flags(dp, name, flags, tag, dsp); 7263b2aab18SMatthew Ahrens if (err != 0) 727745cd3c5Smaybee return (err); 7283b2aab18SMatthew Ahrens if (!dsl_dataset_tryown(*dsp, tag)) { 729*eb633035STom Caputi dsl_dataset_rele_flags(*dsp, flags, tag); 730be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 731745cd3c5Smaybee } 732745cd3c5Smaybee return (0); 733fa9e4066Sahrens } 734fa9e4066Sahrens 7353b2aab18SMatthew Ahrens /* 7363b2aab18SMatthew Ahrens * See the comment above dsl_pool_hold() for details. In summary, a long 7373b2aab18SMatthew Ahrens * hold is used to prevent destruction of a dataset while the pool hold 7383b2aab18SMatthew Ahrens * is dropped, allowing other concurrent operations (e.g. spa_sync()). 7393b2aab18SMatthew Ahrens * 7403b2aab18SMatthew Ahrens * The dataset and pool must be held when this function is called. After it 7413b2aab18SMatthew Ahrens * is called, the pool hold may be released while the dataset is still held 7423b2aab18SMatthew Ahrens * and accessed. 7433b2aab18SMatthew Ahrens */ 7443b2aab18SMatthew Ahrens void 7453b2aab18SMatthew Ahrens dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag) 7463b2aab18SMatthew Ahrens { 7473b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 748e914ace2STim Schumacher (void) zfs_refcount_add(&ds->ds_longholds, tag); 7493b2aab18SMatthew Ahrens } 7503b2aab18SMatthew Ahrens 7513b2aab18SMatthew Ahrens void 7523b2aab18SMatthew Ahrens dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag) 7533b2aab18SMatthew Ahrens { 754e914ace2STim Schumacher (void) zfs_refcount_remove(&ds->ds_longholds, tag); 7553b2aab18SMatthew Ahrens } 7563b2aab18SMatthew Ahrens 7573b2aab18SMatthew Ahrens /* Return B_TRUE if there are any long holds on this dataset. */ 7583b2aab18SMatthew Ahrens boolean_t 7593b2aab18SMatthew Ahrens dsl_dataset_long_held(dsl_dataset_t *ds) 7603b2aab18SMatthew Ahrens { 761e914ace2STim Schumacher return (!zfs_refcount_is_zero(&ds->ds_longholds)); 7623b2aab18SMatthew Ahrens } 7633b2aab18SMatthew Ahrens 764fa9e4066Sahrens void 765fa9e4066Sahrens dsl_dataset_name(dsl_dataset_t *ds, char *name) 766fa9e4066Sahrens { 767fa9e4066Sahrens if (ds == NULL) { 768fa9e4066Sahrens (void) strcpy(name, "mos"); 769fa9e4066Sahrens } else { 770fa9e4066Sahrens dsl_dir_name(ds->ds_dir, name); 7713b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 772fa9e4066Sahrens if (ds->ds_snapname[0]) { 7739adfa60dSMatthew Ahrens VERIFY3U(strlcat(name, "@", ZFS_MAX_DATASET_NAME_LEN), 7749adfa60dSMatthew Ahrens <, ZFS_MAX_DATASET_NAME_LEN); 775745cd3c5Smaybee /* 776745cd3c5Smaybee * We use a "recursive" mutex so that we 777745cd3c5Smaybee * can call dprintf_ds() with ds_lock held. 778745cd3c5Smaybee */ 779fa9e4066Sahrens if (!MUTEX_HELD(&ds->ds_lock)) { 780fa9e4066Sahrens mutex_enter(&ds->ds_lock); 7819adfa60dSMatthew Ahrens VERIFY3U(strlcat(name, ds->ds_snapname, 7829adfa60dSMatthew Ahrens ZFS_MAX_DATASET_NAME_LEN), <, 7839adfa60dSMatthew Ahrens ZFS_MAX_DATASET_NAME_LEN); 784fa9e4066Sahrens mutex_exit(&ds->ds_lock); 785fa9e4066Sahrens } else { 7869adfa60dSMatthew Ahrens VERIFY3U(strlcat(name, ds->ds_snapname, 7879adfa60dSMatthew Ahrens ZFS_MAX_DATASET_NAME_LEN), <, 7889adfa60dSMatthew Ahrens ZFS_MAX_DATASET_NAME_LEN); 789fa9e4066Sahrens } 790fa9e4066Sahrens } 791fa9e4066Sahrens } 792fa9e4066Sahrens } 793fa9e4066Sahrens 7949adfa60dSMatthew Ahrens int 7959adfa60dSMatthew Ahrens dsl_dataset_namelen(dsl_dataset_t *ds) 7969adfa60dSMatthew Ahrens { 7979adfa60dSMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 7989adfa60dSMatthew Ahrens mutex_enter(&ds->ds_lock); 7999adfa60dSMatthew Ahrens int len = dsl_dir_namelen(ds->ds_dir) + 1 + strlen(ds->ds_snapname); 8009adfa60dSMatthew Ahrens mutex_exit(&ds->ds_lock); 8019adfa60dSMatthew Ahrens return (len); 8029adfa60dSMatthew Ahrens } 8039adfa60dSMatthew Ahrens 8043cb34c60Sahrens void 805745cd3c5Smaybee dsl_dataset_rele(dsl_dataset_t *ds, void *tag) 8063cb34c60Sahrens { 8073b2aab18SMatthew Ahrens dmu_buf_rele(ds->ds_dbuf, tag); 808745cd3c5Smaybee } 809745cd3c5Smaybee 810745cd3c5Smaybee void 811*eb633035STom Caputi dsl_dataset_remove_key_mapping(dsl_dataset_t *ds) 812*eb633035STom Caputi { 813*eb633035STom Caputi dsl_dir_t *dd = ds->ds_dir; 814*eb633035STom Caputi 815*eb633035STom Caputi if (dd == NULL || dd->dd_crypto_obj == 0) 816*eb633035STom Caputi return; 817*eb633035STom Caputi 818*eb633035STom Caputi (void) spa_keystore_remove_mapping(dd->dd_pool->dp_spa, 819*eb633035STom Caputi ds->ds_object, ds); 820*eb633035STom Caputi } 821*eb633035STom Caputi 822*eb633035STom Caputi void 823*eb633035STom Caputi dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag) 824*eb633035STom Caputi { 825*eb633035STom Caputi if (flags & DS_HOLD_FLAG_DECRYPT) 826*eb633035STom Caputi dsl_dataset_remove_key_mapping(ds); 827*eb633035STom Caputi 828*eb633035STom Caputi dsl_dataset_rele(ds, tag); 829*eb633035STom Caputi } 830*eb633035STom Caputi 831*eb633035STom Caputi void 832*eb633035STom Caputi dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag) 833745cd3c5Smaybee { 834d808a4fcSJustin T. Gibbs ASSERT3P(ds->ds_owner, ==, tag); 835d808a4fcSJustin T. Gibbs ASSERT(ds->ds_dbuf != NULL); 836745cd3c5Smaybee 8373cb34c60Sahrens mutex_enter(&ds->ds_lock); 838745cd3c5Smaybee ds->ds_owner = NULL; 8393cb34c60Sahrens mutex_exit(&ds->ds_lock); 8403b2aab18SMatthew Ahrens dsl_dataset_long_rele(ds, tag); 841*eb633035STom Caputi dsl_dataset_rele_flags(ds, flags, tag); 8423cb34c60Sahrens } 8433cb34c60Sahrens 8443cb34c60Sahrens boolean_t 8453b2aab18SMatthew Ahrens dsl_dataset_tryown(dsl_dataset_t *ds, void *tag) 8463cb34c60Sahrens { 847745cd3c5Smaybee boolean_t gotit = FALSE; 848745cd3c5Smaybee 8499c3fd121SMatthew Ahrens ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 8503cb34c60Sahrens mutex_enter(&ds->ds_lock); 8513b2aab18SMatthew Ahrens if (ds->ds_owner == NULL && !DS_IS_INCONSISTENT(ds)) { 852503ad85cSMatthew Ahrens ds->ds_owner = tag; 8533b2aab18SMatthew Ahrens dsl_dataset_long_hold(ds, tag); 854745cd3c5Smaybee gotit = TRUE; 8553cb34c60Sahrens } 8563cb34c60Sahrens mutex_exit(&ds->ds_lock); 857745cd3c5Smaybee return (gotit); 858745cd3c5Smaybee } 859745cd3c5Smaybee 8609c3fd121SMatthew Ahrens boolean_t 8619c3fd121SMatthew Ahrens dsl_dataset_has_owner(dsl_dataset_t *ds) 8629c3fd121SMatthew Ahrens { 8639c3fd121SMatthew Ahrens boolean_t rv; 8649c3fd121SMatthew Ahrens mutex_enter(&ds->ds_lock); 8659c3fd121SMatthew Ahrens rv = (ds->ds_owner != NULL); 8669c3fd121SMatthew Ahrens mutex_exit(&ds->ds_lock); 8679c3fd121SMatthew Ahrens return (rv); 8689c3fd121SMatthew Ahrens } 8699c3fd121SMatthew Ahrens 870*eb633035STom Caputi void 871ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) 872ca0cc391SMatthew Ahrens { 873ca0cc391SMatthew Ahrens spa_t *spa = dmu_tx_pool(tx)->dp_spa; 874ca0cc391SMatthew Ahrens objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; 875ca0cc391SMatthew Ahrens uint64_t zero = 0; 876ca0cc391SMatthew Ahrens 877ca0cc391SMatthew Ahrens VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); 878ca0cc391SMatthew Ahrens 879ca0cc391SMatthew Ahrens spa_feature_incr(spa, f, tx); 880ca0cc391SMatthew Ahrens dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); 881ca0cc391SMatthew Ahrens 882ca0cc391SMatthew Ahrens VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid, 883ca0cc391SMatthew Ahrens sizeof (zero), 1, &zero, tx)); 884ca0cc391SMatthew Ahrens } 885ca0cc391SMatthew Ahrens 886ca0cc391SMatthew Ahrens void 887ca0cc391SMatthew Ahrens dsl_dataset_deactivate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx) 888ca0cc391SMatthew Ahrens { 889ca0cc391SMatthew Ahrens spa_t *spa = dmu_tx_pool(tx)->dp_spa; 890ca0cc391SMatthew Ahrens objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; 891ca0cc391SMatthew Ahrens 892ca0cc391SMatthew Ahrens VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET); 893ca0cc391SMatthew Ahrens 894ca0cc391SMatthew Ahrens VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx)); 895ca0cc391SMatthew Ahrens spa_feature_decr(spa, f, tx); 896ca0cc391SMatthew Ahrens } 897ca0cc391SMatthew Ahrens 8981d452cf5Sahrens uint64_t 899088f3894Sahrens dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, 900*eb633035STom Caputi dsl_crypto_params_t *dcp, uint64_t flags, dmu_tx_t *tx) 901fa9e4066Sahrens { 9023cb34c60Sahrens dsl_pool_t *dp = dd->dd_pool; 903fa9e4066Sahrens dmu_buf_t *dbuf; 904fa9e4066Sahrens dsl_dataset_phys_t *dsphys; 9053cb34c60Sahrens uint64_t dsobj; 906fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 907fa9e4066Sahrens 908088f3894Sahrens if (origin == NULL) 909088f3894Sahrens origin = dp->dp_origin_snap; 910088f3894Sahrens 9113cb34c60Sahrens ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); 912c1379625SJustin T. Gibbs ASSERT(origin == NULL || dsl_dataset_phys(origin)->ds_num_children > 0); 913fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 914c1379625SJustin T. Gibbs ASSERT(dsl_dir_phys(dd)->dd_head_dataset_obj == 0); 915fa9e4066Sahrens 9161649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 9171649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 9183b2aab18SMatthew Ahrens VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 919fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 920fa9e4066Sahrens dsphys = dbuf->db_data; 921745cd3c5Smaybee bzero(dsphys, sizeof (dsl_dataset_phys_t)); 922fa9e4066Sahrens dsphys->ds_dir_obj = dd->dd_object; 923ab04eb8eStimh dsphys->ds_flags = flags; 924fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 925fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 926fa9e4066Sahrens sizeof (dsphys->ds_guid)); 927fa9e4066Sahrens dsphys->ds_snapnames_zapobj = 928ab04eb8eStimh zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, 929ab04eb8eStimh DMU_OT_NONE, 0, tx); 930fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 931088f3894Sahrens dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; 932a9799022Sck 933cde58dbcSMatthew Ahrens if (origin == NULL) { 934cde58dbcSMatthew Ahrens dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx); 935cde58dbcSMatthew Ahrens } else { 9363b2aab18SMatthew Ahrens dsl_dataset_t *ohds; /* head of the origin snapshot */ 937cde58dbcSMatthew Ahrens 9383cb34c60Sahrens dsphys->ds_prev_snap_obj = origin->ds_object; 939fa9e4066Sahrens dsphys->ds_prev_snap_txg = 940c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_creation_txg; 941ad135b5dSChristopher Siden dsphys->ds_referenced_bytes = 942c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_referenced_bytes; 943fa9e4066Sahrens dsphys->ds_compressed_bytes = 944c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_compressed_bytes; 945fa9e4066Sahrens dsphys->ds_uncompressed_bytes = 946c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_uncompressed_bytes; 947c166b69dSPaul Dagnelie rrw_enter(&origin->ds_bp_rwlock, RW_READER, FTAG); 948c1379625SJustin T. Gibbs dsphys->ds_bp = dsl_dataset_phys(origin)->ds_bp; 949c166b69dSPaul Dagnelie rrw_exit(&origin->ds_bp_rwlock, FTAG); 95042fcb65eSMatthew Ahrens 95142fcb65eSMatthew Ahrens /* 95242fcb65eSMatthew Ahrens * Inherit flags that describe the dataset's contents 95342fcb65eSMatthew Ahrens * (INCONSISTENT) or properties (Case Insensitive). 95442fcb65eSMatthew Ahrens */ 955c1379625SJustin T. Gibbs dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & 95642fcb65eSMatthew Ahrens (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); 957fa9e4066Sahrens 958ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 959ca0cc391SMatthew Ahrens if (origin->ds_feature_inuse[f]) 960ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(dsobj, f, tx); 961ca0cc391SMatthew Ahrens } 962b5152584SMatthew Ahrens 9633cb34c60Sahrens dmu_buf_will_dirty(origin->ds_dbuf, tx); 964c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_num_children++; 965fa9e4066Sahrens 9663b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 967c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_head_dataset_obj, 968c1379625SJustin T. Gibbs FTAG, &ohds)); 969cde58dbcSMatthew Ahrens dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist, 970cde58dbcSMatthew Ahrens dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx); 971cde58dbcSMatthew Ahrens dsl_dataset_rele(ohds, FTAG); 972cde58dbcSMatthew Ahrens 973088f3894Sahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { 974c1379625SJustin T. Gibbs if (dsl_dataset_phys(origin)->ds_next_clones_obj == 0) { 975c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_next_clones_obj = 976088f3894Sahrens zap_create(mos, 977088f3894Sahrens DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); 978088f3894Sahrens } 9793b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 980c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_next_clones_obj, 981c1379625SJustin T. Gibbs dsobj, tx)); 982088f3894Sahrens } 983088f3894Sahrens 984fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 985c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_origin_obj = origin->ds_object; 986cde58dbcSMatthew Ahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 987c1379625SJustin T. Gibbs if (dsl_dir_phys(origin->ds_dir)->dd_clones == 0) { 988cde58dbcSMatthew Ahrens dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); 989c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_clones = 990cde58dbcSMatthew Ahrens zap_create(mos, 991cde58dbcSMatthew Ahrens DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); 992cde58dbcSMatthew Ahrens } 9933b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 994c1379625SJustin T. Gibbs dsl_dir_phys(origin->ds_dir)->dd_clones, 995c1379625SJustin T. Gibbs dsobj, tx)); 996cde58dbcSMatthew Ahrens } 997fa9e4066Sahrens } 998ab04eb8eStimh 999*eb633035STom Caputi /* handle encryption */ 1000*eb633035STom Caputi dsl_dataset_create_crypt_sync(dsobj, dd, origin, dcp, tx); 1001*eb633035STom Caputi 1002ab04eb8eStimh if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) 1003ab04eb8eStimh dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 1004ab04eb8eStimh 1005ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 1006fa9e4066Sahrens 1007fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 1008c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_head_dataset_obj = dsobj; 10093cb34c60Sahrens 10103cb34c60Sahrens return (dsobj); 10113cb34c60Sahrens } 10123cb34c60Sahrens 10133b2aab18SMatthew Ahrens static void 10143b2aab18SMatthew Ahrens dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx) 10153b2aab18SMatthew Ahrens { 10163b2aab18SMatthew Ahrens objset_t *os; 10173b2aab18SMatthew Ahrens 10183b2aab18SMatthew Ahrens VERIFY0(dmu_objset_from_ds(ds, &os)); 1019bfaed0b9SAndriy Gapon if (bcmp(&os->os_zil_header, &zero_zil, sizeof (zero_zil)) != 0) { 1020bfaed0b9SAndriy Gapon dsl_pool_t *dp = ds->ds_dir->dd_pool; 1021bfaed0b9SAndriy Gapon zio_t *zio; 1022bfaed0b9SAndriy Gapon 1023bfaed0b9SAndriy Gapon bzero(&os->os_zil_header, sizeof (os->os_zil_header)); 1024*eb633035STom Caputi if (os->os_encrypted) 1025*eb633035STom Caputi os->os_next_write_raw[tx->tx_txg & TXG_MASK] = B_TRUE; 1026bfaed0b9SAndriy Gapon 1027bfaed0b9SAndriy Gapon zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 1028bfaed0b9SAndriy Gapon dsl_dataset_sync(ds, zio, tx); 1029bfaed0b9SAndriy Gapon VERIFY0(zio_wait(zio)); 1030bfaed0b9SAndriy Gapon 1031bfaed0b9SAndriy Gapon /* dsl_dataset_sync_done will drop this reference. */ 1032bfaed0b9SAndriy Gapon dmu_buf_add_ref(ds->ds_dbuf, ds); 1033bfaed0b9SAndriy Gapon dsl_dataset_sync_done(ds, tx); 1034bfaed0b9SAndriy Gapon } 10353b2aab18SMatthew Ahrens } 10363b2aab18SMatthew Ahrens 10373cb34c60Sahrens uint64_t 1038ab04eb8eStimh dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, 1039*eb633035STom Caputi dsl_dataset_t *origin, uint64_t flags, cred_t *cr, 1040*eb633035STom Caputi dsl_crypto_params_t *dcp, dmu_tx_t *tx) 10413cb34c60Sahrens { 10423cb34c60Sahrens dsl_pool_t *dp = pdd->dd_pool; 10433cb34c60Sahrens uint64_t dsobj, ddobj; 10443cb34c60Sahrens dsl_dir_t *dd; 10453cb34c60Sahrens 10463b2aab18SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 10473cb34c60Sahrens ASSERT(lastname[0] != '@'); 10483cb34c60Sahrens 1049088f3894Sahrens ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); 10503b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, ddobj, lastname, FTAG, &dd)); 10513cb34c60Sahrens 1052*eb633035STom Caputi dsobj = dsl_dataset_create_sync_dd(dd, origin, dcp, 10533b2aab18SMatthew Ahrens flags & ~DS_CREATE_FLAG_NODIRTY, tx); 10543cb34c60Sahrens 10553cb34c60Sahrens dsl_deleg_set_create_perms(dd, tx, cr); 10563cb34c60Sahrens 1057a2afb611SJerry Jelinek /* 1058a2afb611SJerry Jelinek * Since we're creating a new node we know it's a leaf, so we can 1059a2afb611SJerry Jelinek * initialize the counts if the limit feature is active. 1060a2afb611SJerry Jelinek */ 1061a2afb611SJerry Jelinek if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_FS_SS_LIMIT)) { 1062a2afb611SJerry Jelinek uint64_t cnt = 0; 1063a2afb611SJerry Jelinek objset_t *os = dd->dd_pool->dp_meta_objset; 1064a2afb611SJerry Jelinek 1065a2afb611SJerry Jelinek dsl_dir_zapify(dd, tx); 1066a2afb611SJerry Jelinek VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT, 1067a2afb611SJerry Jelinek sizeof (cnt), 1, &cnt, tx)); 1068a2afb611SJerry Jelinek VERIFY0(zap_add(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT, 1069a2afb611SJerry Jelinek sizeof (cnt), 1, &cnt, tx)); 1070a2afb611SJerry Jelinek } 1071a2afb611SJerry Jelinek 10723b2aab18SMatthew Ahrens dsl_dir_rele(dd, FTAG); 1073fa9e4066Sahrens 1074feaa74e4SMark Maybee /* 1075feaa74e4SMark Maybee * If we are creating a clone, make sure we zero out any stale 1076feaa74e4SMark Maybee * data from the origin snapshots zil header. 1077feaa74e4SMark Maybee */ 10783b2aab18SMatthew Ahrens if (origin != NULL && !(flags & DS_CREATE_FLAG_NODIRTY)) { 1079feaa74e4SMark Maybee dsl_dataset_t *ds; 1080feaa74e4SMark Maybee 10813b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); 10823b2aab18SMatthew Ahrens dsl_dataset_zero_zil(ds, tx); 1083feaa74e4SMark Maybee dsl_dataset_rele(ds, FTAG); 1084feaa74e4SMark Maybee } 1085feaa74e4SMark Maybee 10861d452cf5Sahrens return (dsobj); 1087fa9e4066Sahrens } 1088fa9e4066Sahrens 10891d452cf5Sahrens /* 10903b2aab18SMatthew Ahrens * The unique space in the head dataset can be calculated by subtracting 10913b2aab18SMatthew Ahrens * the space used in the most recent snapshot, that is still being used 10923b2aab18SMatthew Ahrens * in this file system, from the space currently in use. To figure out 10933b2aab18SMatthew Ahrens * the space in the most recent snapshot still in use, we need to take 10943b2aab18SMatthew Ahrens * the total space used in the snapshot and subtract out the space that 10953b2aab18SMatthew Ahrens * has been freed up since the snapshot was taken. 10961d452cf5Sahrens */ 10973b2aab18SMatthew Ahrens void 10983b2aab18SMatthew Ahrens dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) 10991d452cf5Sahrens { 11003b2aab18SMatthew Ahrens uint64_t mrs_used; 11013b2aab18SMatthew Ahrens uint64_t dlused, dlcomp, dluncomp; 11021d452cf5Sahrens 1103bc9014e6SJustin Gibbs ASSERT(!ds->ds_is_snapshot); 11041d452cf5Sahrens 1105c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) 1106c1379625SJustin T. Gibbs mrs_used = dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes; 11073b2aab18SMatthew Ahrens else 11083b2aab18SMatthew Ahrens mrs_used = 0; 1109842727c2SChris Kirby 11103b2aab18SMatthew Ahrens dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp); 1111fa9e4066Sahrens 11123b2aab18SMatthew Ahrens ASSERT3U(dlused, <=, mrs_used); 1113c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes = 1114c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes - (mrs_used - dlused); 111519b94df9SMatthew Ahrens 11163b2aab18SMatthew Ahrens if (spa_version(ds->ds_dir->dd_pool->dp_spa) >= 11173b2aab18SMatthew Ahrens SPA_VERSION_UNIQUE_ACCURATE) 1118c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 1119fa9e4066Sahrens } 1120fa9e4066Sahrens 11213b2aab18SMatthew Ahrens void 11223b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, 11233b2aab18SMatthew Ahrens dmu_tx_t *tx) 1124842727c2SChris Kirby { 11253b2aab18SMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 11263b2aab18SMatthew Ahrens uint64_t count; 11273b2aab18SMatthew Ahrens int err; 11283b2aab18SMatthew Ahrens 1129c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_num_children >= 2); 1130c1379625SJustin T. Gibbs err = zap_remove_int(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 1131c1379625SJustin T. Gibbs obj, tx); 11323b2aab18SMatthew Ahrens /* 11333b2aab18SMatthew Ahrens * The err should not be ENOENT, but a bug in a previous version 11343b2aab18SMatthew Ahrens * of the code could cause upgrade_clones_cb() to not set 11353b2aab18SMatthew Ahrens * ds_next_snap_obj when it should, leading to a missing entry. 11363b2aab18SMatthew Ahrens * If we knew that the pool was created after 11373b2aab18SMatthew Ahrens * SPA_VERSION_NEXT_CLONES, we could assert that it isn't 11383b2aab18SMatthew Ahrens * ENOENT. However, at least we can check that we don't have 11393b2aab18SMatthew Ahrens * too many entries in the next_clones_obj even after failing to 11403b2aab18SMatthew Ahrens * remove this one. 11413b2aab18SMatthew Ahrens */ 11423b2aab18SMatthew Ahrens if (err != ENOENT) 11433b2aab18SMatthew Ahrens VERIFY0(err); 1144c1379625SJustin T. Gibbs ASSERT0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 11453b2aab18SMatthew Ahrens &count)); 1146c1379625SJustin T. Gibbs ASSERT3U(count, <=, dsl_dataset_phys(ds)->ds_num_children - 2); 11473b2aab18SMatthew Ahrens } 1148842727c2SChris Kirby 1149842727c2SChris Kirby 11503b2aab18SMatthew Ahrens blkptr_t * 11513b2aab18SMatthew Ahrens dsl_dataset_get_blkptr(dsl_dataset_t *ds) 11523b2aab18SMatthew Ahrens { 1153c1379625SJustin T. Gibbs return (&dsl_dataset_phys(ds)->ds_bp); 1154842727c2SChris Kirby } 1155842727c2SChris Kirby 11563b2aab18SMatthew Ahrens spa_t * 11573b2aab18SMatthew Ahrens dsl_dataset_get_spa(dsl_dataset_t *ds) 11583b2aab18SMatthew Ahrens { 11593b2aab18SMatthew Ahrens return (ds->ds_dir->dd_pool->dp_spa); 1160842727c2SChris Kirby } 1161842727c2SChris Kirby 11623b2aab18SMatthew Ahrens void 11633b2aab18SMatthew Ahrens dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) 1164fa9e4066Sahrens { 11653b2aab18SMatthew Ahrens dsl_pool_t *dp; 1166842727c2SChris Kirby 11673b2aab18SMatthew Ahrens if (ds == NULL) /* this is the meta-objset */ 11683b2aab18SMatthew Ahrens return; 11691d452cf5Sahrens 11703b2aab18SMatthew Ahrens ASSERT(ds->ds_objset != NULL); 1171fa9e4066Sahrens 1172c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_snap_obj != 0) 11733b2aab18SMatthew Ahrens panic("dirtying snapshot!"); 1174fa9e4066Sahrens 1175bfaed0b9SAndriy Gapon /* Must not dirty a dataset in the same txg where it got snapshotted. */ 1176bfaed0b9SAndriy Gapon ASSERT3U(tx->tx_txg, >, dsl_dataset_phys(ds)->ds_prev_snap_txg); 1177ce636f8bSMatthew Ahrens 1178bfaed0b9SAndriy Gapon dp = ds->ds_dir->dd_pool; 11793b2aab18SMatthew Ahrens if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg)) { 1180*eb633035STom Caputi objset_t *os = ds->ds_objset; 1181*eb633035STom Caputi 11823b2aab18SMatthew Ahrens /* up the hold count until we can be written out */ 11833b2aab18SMatthew Ahrens dmu_buf_add_ref(ds->ds_dbuf, ds); 1184*eb633035STom Caputi 1185*eb633035STom Caputi /* if this dataset is encrypted, grab a reference to the DCK */ 1186*eb633035STom Caputi if (ds->ds_dir->dd_crypto_obj != 0 && 1187*eb633035STom Caputi !os->os_raw_receive && 1188*eb633035STom Caputi !os->os_next_write_raw[tx->tx_txg & TXG_MASK]) { 1189*eb633035STom Caputi ASSERT3P(ds->ds_key_mapping, !=, NULL); 1190*eb633035STom Caputi key_mapping_add_ref(ds->ds_key_mapping, ds); 1191*eb633035STom Caputi } 11923b2aab18SMatthew Ahrens } 11933b2aab18SMatthew Ahrens } 1194fa9e4066Sahrens 11952e2c1355SMatthew Ahrens boolean_t 11962e2c1355SMatthew Ahrens dsl_dataset_is_dirty(dsl_dataset_t *ds) 11972e2c1355SMatthew Ahrens { 11982e2c1355SMatthew Ahrens for (int t = 0; t < TXG_SIZE; t++) { 11992e2c1355SMatthew Ahrens if (txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, 12002e2c1355SMatthew Ahrens ds, t)) 12012e2c1355SMatthew Ahrens return (B_TRUE); 12022e2c1355SMatthew Ahrens } 12032e2c1355SMatthew Ahrens return (B_FALSE); 12042e2c1355SMatthew Ahrens } 12052e2c1355SMatthew Ahrens 1206fa9e4066Sahrens static int 12073b2aab18SMatthew Ahrens dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) 1208fa9e4066Sahrens { 12093b2aab18SMatthew Ahrens uint64_t asize; 1210fa9e4066Sahrens 12113b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) 121288b7b0f2SMatthew Ahrens return (0); 1213fa9e4066Sahrens 1214e1930233Sbonwick /* 12153b2aab18SMatthew Ahrens * If there's an fs-only reservation, any blocks that might become 12163b2aab18SMatthew Ahrens * owned by the snapshot dataset must be accommodated by space 12173b2aab18SMatthew Ahrens * outside of the reservation. 1218e1930233Sbonwick */ 12193b2aab18SMatthew Ahrens ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds)); 1220c1379625SJustin T. Gibbs asize = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, ds->ds_reserved); 12213b2aab18SMatthew Ahrens if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) 1222be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 1223e1930233Sbonwick 12243cb34c60Sahrens /* 12253b2aab18SMatthew Ahrens * Propagate any reserved space for this snapshot to other 12263b2aab18SMatthew Ahrens * snapshot checks in this sync group. 12273cb34c60Sahrens */ 12283b2aab18SMatthew Ahrens if (asize > 0) 12293b2aab18SMatthew Ahrens dsl_dir_willuse_space(ds->ds_dir, asize, tx); 12303cb34c60Sahrens 1231e1930233Sbonwick return (0); 1232e1930233Sbonwick } 1233e1930233Sbonwick 12343cb34c60Sahrens int 12353b2aab18SMatthew Ahrens dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, 1236a2afb611SJerry Jelinek dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr) 12371d452cf5Sahrens { 12383b2aab18SMatthew Ahrens int error; 12393b2aab18SMatthew Ahrens uint64_t value; 1240fa9e4066Sahrens 12413b2aab18SMatthew Ahrens ds->ds_trysnap_txg = tx->tx_txg; 1242745cd3c5Smaybee 12433b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) 1244842727c2SChris Kirby return (0); 1245fa9e4066Sahrens 1246fa9e4066Sahrens /* 12473b2aab18SMatthew Ahrens * We don't allow multiple snapshots of the same txg. If there 12483b2aab18SMatthew Ahrens * is already one, try again. 1249fa9e4066Sahrens */ 1250c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) 1251be6fd75aSMatthew Ahrens return (SET_ERROR(EAGAIN)); 1252fa9e4066Sahrens 1253fa9e4066Sahrens /* 12543b2aab18SMatthew Ahrens * Check for conflicting snapshot name. 1255fa9e4066Sahrens */ 12563b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(ds, snapname, &value); 12573b2aab18SMatthew Ahrens if (error == 0) 1258be6fd75aSMatthew Ahrens return (SET_ERROR(EEXIST)); 12593b2aab18SMatthew Ahrens if (error != ENOENT) 12603b2aab18SMatthew Ahrens return (error); 1261842727c2SChris Kirby 1262ca48f36fSKeith M Wesolowski /* 1263ca48f36fSKeith M Wesolowski * We don't allow taking snapshots of inconsistent datasets, such as 1264ca48f36fSKeith M Wesolowski * those into which we are currently receiving. However, if we are 1265ca48f36fSKeith M Wesolowski * creating this snapshot as part of a receive, this check will be 1266ca48f36fSKeith M Wesolowski * executed atomically with respect to the completion of the receive 1267ca48f36fSKeith M Wesolowski * itself but prior to the clearing of DS_FLAG_INCONSISTENT; in this 1268ca48f36fSKeith M Wesolowski * case we ignore this, knowing it will be fixed up for us shortly in 1269ca48f36fSKeith M Wesolowski * dmu_recv_end_sync(). 1270ca48f36fSKeith M Wesolowski */ 1271ca48f36fSKeith M Wesolowski if (!recv && DS_IS_INCONSISTENT(ds)) 1272ca48f36fSKeith M Wesolowski return (SET_ERROR(EBUSY)); 1273ca48f36fSKeith M Wesolowski 1274a2afb611SJerry Jelinek /* 1275a2afb611SJerry Jelinek * Skip the check for temporary snapshots or if we have already checked 1276a2afb611SJerry Jelinek * the counts in dsl_dataset_snapshot_check. This means we really only 1277a2afb611SJerry Jelinek * check the count here when we're receiving a stream. 1278a2afb611SJerry Jelinek */ 1279a2afb611SJerry Jelinek if (cnt != 0 && cr != NULL) { 1280a2afb611SJerry Jelinek error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, 1281a2afb611SJerry Jelinek ZFS_PROP_SNAPSHOT_LIMIT, NULL, cr); 1282a2afb611SJerry Jelinek if (error != 0) 1283a2afb611SJerry Jelinek return (error); 1284a2afb611SJerry Jelinek } 1285a2afb611SJerry Jelinek 12863b2aab18SMatthew Ahrens error = dsl_dataset_snapshot_reserve_space(ds, tx); 12873b2aab18SMatthew Ahrens if (error != 0) 12883b2aab18SMatthew Ahrens return (error); 1289842727c2SChris Kirby 12901d452cf5Sahrens return (0); 12911d452cf5Sahrens } 12921d452cf5Sahrens 12932840dce1SChris Williamson int 12943b2aab18SMatthew Ahrens dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx) 1295745cd3c5Smaybee { 12963b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t *ddsa = arg; 12973b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 12983b2aab18SMatthew Ahrens nvpair_t *pair; 12993b2aab18SMatthew Ahrens int rv = 0; 13003b2aab18SMatthew Ahrens 1301a2afb611SJerry Jelinek /* 1302a2afb611SJerry Jelinek * Pre-compute how many total new snapshots will be created for each 1303a2afb611SJerry Jelinek * level in the tree and below. This is needed for validating the 1304a2afb611SJerry Jelinek * snapshot limit when either taking a recursive snapshot or when 1305a2afb611SJerry Jelinek * taking multiple snapshots. 1306a2afb611SJerry Jelinek * 1307a2afb611SJerry Jelinek * The problem is that the counts are not actually adjusted when 1308a2afb611SJerry Jelinek * we are checking, only when we finally sync. For a single snapshot, 1309a2afb611SJerry Jelinek * this is easy, the count will increase by 1 at each node up the tree, 1310a2afb611SJerry Jelinek * but its more complicated for the recursive/multiple snapshot case. 1311a2afb611SJerry Jelinek * 1312a2afb611SJerry Jelinek * The dsl_fs_ss_limit_check function does recursively check the count 1313a2afb611SJerry Jelinek * at each level up the tree but since it is validating each snapshot 1314a2afb611SJerry Jelinek * independently we need to be sure that we are validating the complete 1315a2afb611SJerry Jelinek * count for the entire set of snapshots. We do this by rolling up the 1316a2afb611SJerry Jelinek * counts for each component of the name into an nvlist and then 1317a2afb611SJerry Jelinek * checking each of those cases with the aggregated count. 1318a2afb611SJerry Jelinek * 1319a2afb611SJerry Jelinek * This approach properly handles not only the recursive snapshot 1320a2afb611SJerry Jelinek * case (where we get all of those on the ddsa_snaps list) but also 1321a2afb611SJerry Jelinek * the sibling case (e.g. snapshot a/b and a/c so that we will also 1322a2afb611SJerry Jelinek * validate the limit on 'a' using a count of 2). 1323a2afb611SJerry Jelinek * 1324a2afb611SJerry Jelinek * We validate the snapshot names in the third loop and only report 1325a2afb611SJerry Jelinek * name errors once. 1326a2afb611SJerry Jelinek */ 1327a2afb611SJerry Jelinek if (dmu_tx_is_syncing(tx)) { 1328a2afb611SJerry Jelinek nvlist_t *cnt_track = NULL; 1329a2afb611SJerry Jelinek cnt_track = fnvlist_alloc(); 1330a2afb611SJerry Jelinek 1331a2afb611SJerry Jelinek /* Rollup aggregated counts into the cnt_track list */ 1332a2afb611SJerry Jelinek for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 1333a2afb611SJerry Jelinek pair != NULL; 1334a2afb611SJerry Jelinek pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 1335a2afb611SJerry Jelinek char *pdelim; 1336a2afb611SJerry Jelinek uint64_t val; 1337a2afb611SJerry Jelinek char nm[MAXPATHLEN]; 1338a2afb611SJerry Jelinek 1339a2afb611SJerry Jelinek (void) strlcpy(nm, nvpair_name(pair), sizeof (nm)); 1340a2afb611SJerry Jelinek pdelim = strchr(nm, '@'); 1341a2afb611SJerry Jelinek if (pdelim == NULL) 1342a2afb611SJerry Jelinek continue; 1343a2afb611SJerry Jelinek *pdelim = '\0'; 1344a2afb611SJerry Jelinek 1345a2afb611SJerry Jelinek do { 1346a2afb611SJerry Jelinek if (nvlist_lookup_uint64(cnt_track, nm, 1347a2afb611SJerry Jelinek &val) == 0) { 1348a2afb611SJerry Jelinek /* update existing entry */ 1349a2afb611SJerry Jelinek fnvlist_add_uint64(cnt_track, nm, 1350a2afb611SJerry Jelinek val + 1); 1351a2afb611SJerry Jelinek } else { 1352a2afb611SJerry Jelinek /* add to list */ 1353a2afb611SJerry Jelinek fnvlist_add_uint64(cnt_track, nm, 1); 1354a2afb611SJerry Jelinek } 1355a2afb611SJerry Jelinek 1356a2afb611SJerry Jelinek pdelim = strrchr(nm, '/'); 1357a2afb611SJerry Jelinek if (pdelim != NULL) 1358a2afb611SJerry Jelinek *pdelim = '\0'; 1359a2afb611SJerry Jelinek } while (pdelim != NULL); 1360a2afb611SJerry Jelinek } 1361a2afb611SJerry Jelinek 1362a2afb611SJerry Jelinek /* Check aggregated counts at each level */ 1363a2afb611SJerry Jelinek for (pair = nvlist_next_nvpair(cnt_track, NULL); 1364a2afb611SJerry Jelinek pair != NULL; pair = nvlist_next_nvpair(cnt_track, pair)) { 1365a2afb611SJerry Jelinek int error = 0; 1366a2afb611SJerry Jelinek char *name; 1367a2afb611SJerry Jelinek uint64_t cnt = 0; 1368a2afb611SJerry Jelinek dsl_dataset_t *ds; 1369a2afb611SJerry Jelinek 1370a2afb611SJerry Jelinek name = nvpair_name(pair); 1371a2afb611SJerry Jelinek cnt = fnvpair_value_uint64(pair); 1372a2afb611SJerry Jelinek ASSERT(cnt > 0); 1373a2afb611SJerry Jelinek 1374a2afb611SJerry Jelinek error = dsl_dataset_hold(dp, name, FTAG, &ds); 1375a2afb611SJerry Jelinek if (error == 0) { 1376a2afb611SJerry Jelinek error = dsl_fs_ss_limit_check(ds->ds_dir, cnt, 1377a2afb611SJerry Jelinek ZFS_PROP_SNAPSHOT_LIMIT, NULL, 1378a2afb611SJerry Jelinek ddsa->ddsa_cr); 1379a2afb611SJerry Jelinek dsl_dataset_rele(ds, FTAG); 1380a2afb611SJerry Jelinek } 1381a2afb611SJerry Jelinek 1382a2afb611SJerry Jelinek if (error != 0) { 1383a2afb611SJerry Jelinek if (ddsa->ddsa_errors != NULL) 1384a2afb611SJerry Jelinek fnvlist_add_int32(ddsa->ddsa_errors, 1385a2afb611SJerry Jelinek name, error); 1386a2afb611SJerry Jelinek rv = error; 1387a2afb611SJerry Jelinek /* only report one error for this check */ 1388a2afb611SJerry Jelinek break; 1389a2afb611SJerry Jelinek } 1390a2afb611SJerry Jelinek } 1391a2afb611SJerry Jelinek nvlist_free(cnt_track); 1392a2afb611SJerry Jelinek } 1393a2afb611SJerry Jelinek 13943b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 13953b2aab18SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 13963b2aab18SMatthew Ahrens int error = 0; 13973b2aab18SMatthew Ahrens dsl_dataset_t *ds; 13983b2aab18SMatthew Ahrens char *name, *atp; 13999adfa60dSMatthew Ahrens char dsname[ZFS_MAX_DATASET_NAME_LEN]; 14003b2aab18SMatthew Ahrens 14013b2aab18SMatthew Ahrens name = nvpair_name(pair); 14029adfa60dSMatthew Ahrens if (strlen(name) >= ZFS_MAX_DATASET_NAME_LEN) 1403be6fd75aSMatthew Ahrens error = SET_ERROR(ENAMETOOLONG); 14043b2aab18SMatthew Ahrens if (error == 0) { 14053b2aab18SMatthew Ahrens atp = strchr(name, '@'); 14063b2aab18SMatthew Ahrens if (atp == NULL) 1407be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 14083b2aab18SMatthew Ahrens if (error == 0) 14093b2aab18SMatthew Ahrens (void) strlcpy(dsname, name, atp - name + 1); 14103b2aab18SMatthew Ahrens } 14113b2aab18SMatthew Ahrens if (error == 0) 14123b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, dsname, FTAG, &ds); 14133b2aab18SMatthew Ahrens if (error == 0) { 1414a2afb611SJerry Jelinek /* passing 0/NULL skips dsl_fs_ss_limit_check */ 14153b2aab18SMatthew Ahrens error = dsl_dataset_snapshot_check_impl(ds, 1416a2afb611SJerry Jelinek atp + 1, tx, B_FALSE, 0, NULL); 14173b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 14183b2aab18SMatthew Ahrens } 1419745cd3c5Smaybee 14203b2aab18SMatthew Ahrens if (error != 0) { 14213b2aab18SMatthew Ahrens if (ddsa->ddsa_errors != NULL) { 14223b2aab18SMatthew Ahrens fnvlist_add_int32(ddsa->ddsa_errors, 14233b2aab18SMatthew Ahrens name, error); 14243b2aab18SMatthew Ahrens } 14253b2aab18SMatthew Ahrens rv = error; 14263b2aab18SMatthew Ahrens } 14273b2aab18SMatthew Ahrens } 1428a2afb611SJerry Jelinek 14293b2aab18SMatthew Ahrens return (rv); 1430745cd3c5Smaybee } 1431745cd3c5Smaybee 14323b2aab18SMatthew Ahrens void 14333b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, 14343b2aab18SMatthew Ahrens dmu_tx_t *tx) 1435745cd3c5Smaybee { 14363b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 14373b2aab18SMatthew Ahrens dmu_buf_t *dbuf; 14383b2aab18SMatthew Ahrens dsl_dataset_phys_t *dsphys; 14393b2aab18SMatthew Ahrens uint64_t dsobj, crtxg; 14403b2aab18SMatthew Ahrens objset_t *mos = dp->dp_meta_objset; 14413b2aab18SMatthew Ahrens objset_t *os; 1442745cd3c5Smaybee 14433b2aab18SMatthew Ahrens ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); 1444c33e334fSMatthew Ahrens 1445c33e334fSMatthew Ahrens /* 14463b2aab18SMatthew Ahrens * If we are on an old pool, the zil must not be active, in which 14473b2aab18SMatthew Ahrens * case it will be zeroed. Usually zil_suspend() accomplishes this. 1448c33e334fSMatthew Ahrens */ 14493b2aab18SMatthew Ahrens ASSERT(spa_version(dmu_tx_pool(tx)->dp_spa) >= SPA_VERSION_FAST_SNAP || 14503b2aab18SMatthew Ahrens dmu_objset_from_ds(ds, &os) != 0 || 14513b2aab18SMatthew Ahrens bcmp(&os->os_phys->os_zil_header, &zero_zil, 14523b2aab18SMatthew Ahrens sizeof (zero_zil)) == 0); 1453c33e334fSMatthew Ahrens 1454bfaed0b9SAndriy Gapon /* Should not snapshot a dirty dataset. */ 1455bfaed0b9SAndriy Gapon ASSERT(!txg_list_member(&ds->ds_dir->dd_pool->dp_dirty_datasets, 1456bfaed0b9SAndriy Gapon ds, tx->tx_txg)); 1457bfaed0b9SAndriy Gapon 1458a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(ds->ds_dir, 1, DD_FIELD_SNAPSHOT_COUNT, tx); 1459cde58dbcSMatthew Ahrens 1460cde58dbcSMatthew Ahrens /* 14613b2aab18SMatthew Ahrens * The origin's ds_creation_txg has to be < TXG_INITIAL 1462088f3894Sahrens */ 1463088f3894Sahrens if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) 1464088f3894Sahrens crtxg = 1; 1465088f3894Sahrens else 1466088f3894Sahrens crtxg = tx->tx_txg; 1467088f3894Sahrens 14681649cd4bStabriz dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, 14691649cd4bStabriz DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); 14703b2aab18SMatthew Ahrens VERIFY0(dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); 1471fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 1472fa9e4066Sahrens dsphys = dbuf->db_data; 1473745cd3c5Smaybee bzero(dsphys, sizeof (dsl_dataset_phys_t)); 14741d452cf5Sahrens dsphys->ds_dir_obj = ds->ds_dir->dd_object; 1475fa9e4066Sahrens dsphys->ds_fsid_guid = unique_create(); 1476fa9e4066Sahrens (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, 1477fa9e4066Sahrens sizeof (dsphys->ds_guid)); 1478c1379625SJustin T. Gibbs dsphys->ds_prev_snap_obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 1479c1379625SJustin T. Gibbs dsphys->ds_prev_snap_txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; 1480fa9e4066Sahrens dsphys->ds_next_snap_obj = ds->ds_object; 1481fa9e4066Sahrens dsphys->ds_num_children = 1; 1482fa9e4066Sahrens dsphys->ds_creation_time = gethrestime_sec(); 1483088f3894Sahrens dsphys->ds_creation_txg = crtxg; 1484c1379625SJustin T. Gibbs dsphys->ds_deadlist_obj = dsl_dataset_phys(ds)->ds_deadlist_obj; 1485c1379625SJustin T. Gibbs dsphys->ds_referenced_bytes = dsl_dataset_phys(ds)->ds_referenced_bytes; 1486c1379625SJustin T. Gibbs dsphys->ds_compressed_bytes = dsl_dataset_phys(ds)->ds_compressed_bytes; 1487c1379625SJustin T. Gibbs dsphys->ds_uncompressed_bytes = 1488c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_uncompressed_bytes; 1489c1379625SJustin T. Gibbs dsphys->ds_flags = dsl_dataset_phys(ds)->ds_flags; 1490c166b69dSPaul Dagnelie rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 1491c1379625SJustin T. Gibbs dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; 1492c166b69dSPaul Dagnelie rrw_exit(&ds->ds_bp_rwlock, FTAG); 1493ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 1494fa9e4066Sahrens 1495ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 1496ca0cc391SMatthew Ahrens if (ds->ds_feature_inuse[f]) 1497ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(dsobj, f, tx); 1498ca0cc391SMatthew Ahrens } 1499b5152584SMatthew Ahrens 1500c1379625SJustin T. Gibbs ASSERT3U(ds->ds_prev != 0, ==, 1501c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); 15021d452cf5Sahrens if (ds->ds_prev) { 1503088f3894Sahrens uint64_t next_clones_obj = 1504c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_next_clones_obj; 1505c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 1506fa9e4066Sahrens ds->ds_object || 1507c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_num_children > 1); 1508c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj == 1509c1379625SJustin T. Gibbs ds->ds_object) { 15101d452cf5Sahrens dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 1511c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, ==, 1512c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_creation_txg); 1513c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_next_snap_obj = dsobj; 1514088f3894Sahrens } else if (next_clones_obj != 0) { 15153b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(ds->ds_prev, 1516c33e334fSMatthew Ahrens dsphys->ds_next_snap_obj, tx); 15173b2aab18SMatthew Ahrens VERIFY0(zap_add_int(mos, 1518088f3894Sahrens next_clones_obj, dsobj, tx)); 1519fa9e4066Sahrens } 1520fa9e4066Sahrens } 1521fa9e4066Sahrens 1522a9799022Sck /* 1523a9799022Sck * If we have a reference-reservation on this dataset, we will 1524a9799022Sck * need to increase the amount of refreservation being charged 1525a9799022Sck * since our unique space is going to zero. 1526a9799022Sck */ 1527a9799022Sck if (ds->ds_reserved) { 15283f9d6ad7SLin Ling int64_t delta; 15293f9d6ad7SLin Ling ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); 1530c1379625SJustin T. Gibbs delta = MIN(dsl_dataset_phys(ds)->ds_unique_bytes, 1531c1379625SJustin T. Gibbs ds->ds_reserved); 153274e7dc98SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, 15333f9d6ad7SLin Ling delta, 0, 0, tx); 1534a9799022Sck } 1535a9799022Sck 1536fa9e4066Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1537c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_deadlist_obj = 1538c1379625SJustin T. Gibbs dsl_deadlist_clone(&ds->ds_deadlist, UINT64_MAX, 1539c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); 1540cde58dbcSMatthew Ahrens dsl_deadlist_close(&ds->ds_deadlist); 1541c1379625SJustin T. Gibbs dsl_deadlist_open(&ds->ds_deadlist, mos, 1542c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_deadlist_obj); 1543cde58dbcSMatthew Ahrens dsl_deadlist_add_key(&ds->ds_deadlist, 1544c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); 1545cde58dbcSMatthew Ahrens 15465cabbc6bSPrashanth Sreenivasa if (dsl_dataset_remap_deadlist_exists(ds)) { 15475cabbc6bSPrashanth Sreenivasa uint64_t remap_deadlist_obj = 15485cabbc6bSPrashanth Sreenivasa dsl_dataset_get_remap_deadlist_object(ds); 15495cabbc6bSPrashanth Sreenivasa /* 15505cabbc6bSPrashanth Sreenivasa * Move the remap_deadlist to the snapshot. The head 15515cabbc6bSPrashanth Sreenivasa * will create a new remap deadlist on demand, from 15525cabbc6bSPrashanth Sreenivasa * dsl_dataset_block_remapped(). 15535cabbc6bSPrashanth Sreenivasa */ 15545cabbc6bSPrashanth Sreenivasa dsl_dataset_unset_remap_deadlist_object(ds, tx); 15555cabbc6bSPrashanth Sreenivasa dsl_deadlist_close(&ds->ds_remap_deadlist); 15565cabbc6bSPrashanth Sreenivasa 15575cabbc6bSPrashanth Sreenivasa dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); 15585cabbc6bSPrashanth Sreenivasa VERIFY0(zap_add(mos, dsobj, DS_FIELD_REMAP_DEADLIST, 15595cabbc6bSPrashanth Sreenivasa sizeof (remap_deadlist_obj), 1, &remap_deadlist_obj, tx)); 15605cabbc6bSPrashanth Sreenivasa } 15615cabbc6bSPrashanth Sreenivasa 1562*eb633035STom Caputi /* 1563*eb633035STom Caputi * Create a ivset guid for this snapshot if the dataset is 1564*eb633035STom Caputi * encrypted. This may be overridden by a raw receive. A 1565*eb633035STom Caputi * previous implementation of this code did not have this 1566*eb633035STom Caputi * field as part of the on-disk format for ZFS encryption 1567*eb633035STom Caputi * (see errata #4). As part of the remediation for this 1568*eb633035STom Caputi * issue, we ask the user to enable the bookmark_v2 feature 1569*eb633035STom Caputi * which is now a dependency of the encryption feature. We 1570*eb633035STom Caputi * use this as a heuristic to determine when the user has 1571*eb633035STom Caputi * elected to correct any datasets created with the old code. 1572*eb633035STom Caputi * As a result, we only do this step if the bookmark_v2 1573*eb633035STom Caputi * feature is enabled, which limits the number of states a 1574*eb633035STom Caputi * given pool / dataset can be in with regards to terms of 1575*eb633035STom Caputi * correcting the issue. 1576*eb633035STom Caputi */ 1577*eb633035STom Caputi if (ds->ds_dir->dd_crypto_obj != 0 && 1578*eb633035STom Caputi spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_BOOKMARK_V2)) { 1579*eb633035STom Caputi uint64_t ivset_guid = unique_create(); 1580*eb633035STom Caputi 1581*eb633035STom Caputi dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); 1582*eb633035STom Caputi VERIFY0(zap_add(mos, dsobj, DS_FIELD_IVSET_GUID, 1583*eb633035STom Caputi sizeof (ivset_guid), 1, &ivset_guid, tx)); 1584*eb633035STom Caputi } 1585*eb633035STom Caputi 1586c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_prev_snap_txg, <, tx->tx_txg); 1587c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj = dsobj; 1588c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_txg = crtxg; 1589c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes = 0; 15905cabbc6bSPrashanth Sreenivasa 1591a9799022Sck if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) 1592c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; 1593fa9e4066Sahrens 1594c1379625SJustin T. Gibbs VERIFY0(zap_add(mos, dsl_dataset_phys(ds)->ds_snapnames_zapobj, 15953b2aab18SMatthew Ahrens snapname, 8, 1, &dsobj, tx)); 1596fa9e4066Sahrens 1597fa9e4066Sahrens if (ds->ds_prev) 15983b2aab18SMatthew Ahrens dsl_dataset_rele(ds->ds_prev, ds); 15993b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 1600c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_prev_snap_obj, ds, &ds->ds_prev)); 1601ecd6cf80Smarks 16023f9d6ad7SLin Ling dsl_scan_ds_snapshotted(ds, tx); 1603088f3894Sahrens 160471eb0538SChris Kirby dsl_dir_snap_cmtime_update(ds->ds_dir); 160571eb0538SChris Kirby 16064445fffbSMatthew Ahrens spa_history_log_internal_ds(ds->ds_prev, "snapshot", tx, ""); 1607fa9e4066Sahrens } 1608fa9e4066Sahrens 16092840dce1SChris Williamson void 16103b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx) 1611fa9e4066Sahrens { 16123b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t *ddsa = arg; 16133b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 16143b2aab18SMatthew Ahrens nvpair_t *pair; 161591ebeef5Sahrens 16163b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(ddsa->ddsa_snaps, NULL); 16173b2aab18SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) { 16183b2aab18SMatthew Ahrens dsl_dataset_t *ds; 16193b2aab18SMatthew Ahrens char *name, *atp; 16209adfa60dSMatthew Ahrens char dsname[ZFS_MAX_DATASET_NAME_LEN]; 16213b2aab18SMatthew Ahrens 16223b2aab18SMatthew Ahrens name = nvpair_name(pair); 16233b2aab18SMatthew Ahrens atp = strchr(name, '@'); 16243b2aab18SMatthew Ahrens (void) strlcpy(dsname, name, atp - name + 1); 16253b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, dsname, FTAG, &ds)); 16263b2aab18SMatthew Ahrens 16273b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(ds, atp + 1, tx); 16283b2aab18SMatthew Ahrens if (ddsa->ddsa_props != NULL) { 16293b2aab18SMatthew Ahrens dsl_props_set_sync_impl(ds->ds_prev, 16303b2aab18SMatthew Ahrens ZPROP_SRC_LOCAL, ddsa->ddsa_props, tx); 16313b2aab18SMatthew Ahrens } 16323b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 16333b2aab18SMatthew Ahrens } 1634fa9e4066Sahrens } 1635fa9e4066Sahrens 16363b2aab18SMatthew Ahrens /* 16373b2aab18SMatthew Ahrens * The snapshots must all be in the same pool. 16383b2aab18SMatthew Ahrens * All-or-nothing: if there are any failures, nothing will be modified. 16393b2aab18SMatthew Ahrens */ 16403b2aab18SMatthew Ahrens int 16413b2aab18SMatthew Ahrens dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors) 164219b94df9SMatthew Ahrens { 16433b2aab18SMatthew Ahrens dsl_dataset_snapshot_arg_t ddsa; 16443b2aab18SMatthew Ahrens nvpair_t *pair; 16453b2aab18SMatthew Ahrens boolean_t needsuspend; 16463b2aab18SMatthew Ahrens int error; 16473b2aab18SMatthew Ahrens spa_t *spa; 16483b2aab18SMatthew Ahrens char *firstname; 16493b2aab18SMatthew Ahrens nvlist_t *suspended = NULL; 165019b94df9SMatthew Ahrens 16513b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(snaps, NULL); 16523b2aab18SMatthew Ahrens if (pair == NULL) 16533b2aab18SMatthew Ahrens return (0); 16543b2aab18SMatthew Ahrens firstname = nvpair_name(pair); 16553b2aab18SMatthew Ahrens 16563b2aab18SMatthew Ahrens error = spa_open(firstname, &spa, FTAG); 16573b2aab18SMatthew Ahrens if (error != 0) 16583b2aab18SMatthew Ahrens return (error); 16593b2aab18SMatthew Ahrens needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); 16603b2aab18SMatthew Ahrens spa_close(spa, FTAG); 16613b2aab18SMatthew Ahrens 16623b2aab18SMatthew Ahrens if (needsuspend) { 16633b2aab18SMatthew Ahrens suspended = fnvlist_alloc(); 16643b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 16653b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(snaps, pair)) { 16669adfa60dSMatthew Ahrens char fsname[ZFS_MAX_DATASET_NAME_LEN]; 16673b2aab18SMatthew Ahrens char *snapname = nvpair_name(pair); 16683b2aab18SMatthew Ahrens char *atp; 16693b2aab18SMatthew Ahrens void *cookie; 16703b2aab18SMatthew Ahrens 16713b2aab18SMatthew Ahrens atp = strchr(snapname, '@'); 16723b2aab18SMatthew Ahrens if (atp == NULL) { 1673be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 16743b2aab18SMatthew Ahrens break; 16753b2aab18SMatthew Ahrens } 16763b2aab18SMatthew Ahrens (void) strlcpy(fsname, snapname, atp - snapname + 1); 16773b2aab18SMatthew Ahrens 16783b2aab18SMatthew Ahrens error = zil_suspend(fsname, &cookie); 16793b2aab18SMatthew Ahrens if (error != 0) 16803b2aab18SMatthew Ahrens break; 16813b2aab18SMatthew Ahrens fnvlist_add_uint64(suspended, fsname, 16823b2aab18SMatthew Ahrens (uintptr_t)cookie); 16833b2aab18SMatthew Ahrens } 16843b2aab18SMatthew Ahrens } 16853b2aab18SMatthew Ahrens 16863b2aab18SMatthew Ahrens ddsa.ddsa_snaps = snaps; 16873b2aab18SMatthew Ahrens ddsa.ddsa_props = props; 16883b2aab18SMatthew Ahrens ddsa.ddsa_errors = errors; 1689a2afb611SJerry Jelinek ddsa.ddsa_cr = CRED(); 16903b2aab18SMatthew Ahrens 16913b2aab18SMatthew Ahrens if (error == 0) { 16923b2aab18SMatthew Ahrens error = dsl_sync_task(firstname, dsl_dataset_snapshot_check, 16933b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync, &ddsa, 16947d46dc6cSMatthew Ahrens fnvlist_num_pairs(snaps) * 3, ZFS_SPACE_CHECK_NORMAL); 16953b2aab18SMatthew Ahrens } 16963b2aab18SMatthew Ahrens 16973b2aab18SMatthew Ahrens if (suspended != NULL) { 16983b2aab18SMatthew Ahrens for (pair = nvlist_next_nvpair(suspended, NULL); pair != NULL; 16993b2aab18SMatthew Ahrens pair = nvlist_next_nvpair(suspended, pair)) { 17003b2aab18SMatthew Ahrens zil_resume((void *)(uintptr_t) 17013b2aab18SMatthew Ahrens fnvpair_value_uint64(pair)); 17023b2aab18SMatthew Ahrens } 17033b2aab18SMatthew Ahrens fnvlist_free(suspended); 17043b2aab18SMatthew Ahrens } 17053b2aab18SMatthew Ahrens 17063b2aab18SMatthew Ahrens return (error); 17073b2aab18SMatthew Ahrens } 17083b2aab18SMatthew Ahrens 17093b2aab18SMatthew Ahrens typedef struct dsl_dataset_snapshot_tmp_arg { 17103b2aab18SMatthew Ahrens const char *ddsta_fsname; 17113b2aab18SMatthew Ahrens const char *ddsta_snapname; 17123b2aab18SMatthew Ahrens minor_t ddsta_cleanup_minor; 17133b2aab18SMatthew Ahrens const char *ddsta_htag; 17143b2aab18SMatthew Ahrens } dsl_dataset_snapshot_tmp_arg_t; 17153b2aab18SMatthew Ahrens 17163b2aab18SMatthew Ahrens static int 17173b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_check(void *arg, dmu_tx_t *tx) 17183b2aab18SMatthew Ahrens { 17193b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; 17203b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 17213b2aab18SMatthew Ahrens dsl_dataset_t *ds; 17223b2aab18SMatthew Ahrens int error; 17233b2aab18SMatthew Ahrens 17243b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds); 17253b2aab18SMatthew Ahrens if (error != 0) 17263b2aab18SMatthew Ahrens return (error); 17273b2aab18SMatthew Ahrens 1728a2afb611SJerry Jelinek /* NULL cred means no limit check for tmp snapshot */ 1729ca48f36fSKeith M Wesolowski error = dsl_dataset_snapshot_check_impl(ds, ddsta->ddsta_snapname, 1730a2afb611SJerry Jelinek tx, B_FALSE, 0, NULL); 17313b2aab18SMatthew Ahrens if (error != 0) { 17323b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 17333b2aab18SMatthew Ahrens return (error); 17343b2aab18SMatthew Ahrens } 17353b2aab18SMatthew Ahrens 17363b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS) { 17373b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 1738be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 17393b2aab18SMatthew Ahrens } 17403b2aab18SMatthew Ahrens error = dsl_dataset_user_hold_check_one(NULL, ddsta->ddsta_htag, 17413b2aab18SMatthew Ahrens B_TRUE, tx); 17423b2aab18SMatthew Ahrens if (error != 0) { 17433b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 17443b2aab18SMatthew Ahrens return (error); 17453b2aab18SMatthew Ahrens } 17463b2aab18SMatthew Ahrens 17473b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 17483b2aab18SMatthew Ahrens return (0); 17493b2aab18SMatthew Ahrens } 17503b2aab18SMatthew Ahrens 17513b2aab18SMatthew Ahrens static void 17523b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx) 17533b2aab18SMatthew Ahrens { 17543b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t *ddsta = arg; 17553b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 17563b2aab18SMatthew Ahrens dsl_dataset_t *ds; 17573b2aab18SMatthew Ahrens 17583b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds)); 17593b2aab18SMatthew Ahrens 17603b2aab18SMatthew Ahrens dsl_dataset_snapshot_sync_impl(ds, ddsta->ddsta_snapname, tx); 17613b2aab18SMatthew Ahrens dsl_dataset_user_hold_sync_one(ds->ds_prev, ddsta->ddsta_htag, 17623b2aab18SMatthew Ahrens ddsta->ddsta_cleanup_minor, gethrestime_sec(), tx); 17633b2aab18SMatthew Ahrens dsl_destroy_snapshot_sync_impl(ds->ds_prev, B_TRUE, tx); 17643b2aab18SMatthew Ahrens 17653b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 17663b2aab18SMatthew Ahrens } 17673b2aab18SMatthew Ahrens 17683b2aab18SMatthew Ahrens int 17693b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, 17703b2aab18SMatthew Ahrens minor_t cleanup_minor, const char *htag) 17713b2aab18SMatthew Ahrens { 17723b2aab18SMatthew Ahrens dsl_dataset_snapshot_tmp_arg_t ddsta; 17733b2aab18SMatthew Ahrens int error; 17743b2aab18SMatthew Ahrens spa_t *spa; 17753b2aab18SMatthew Ahrens boolean_t needsuspend; 17763b2aab18SMatthew Ahrens void *cookie; 17773b2aab18SMatthew Ahrens 17783b2aab18SMatthew Ahrens ddsta.ddsta_fsname = fsname; 17793b2aab18SMatthew Ahrens ddsta.ddsta_snapname = snapname; 17803b2aab18SMatthew Ahrens ddsta.ddsta_cleanup_minor = cleanup_minor; 17813b2aab18SMatthew Ahrens ddsta.ddsta_htag = htag; 17823b2aab18SMatthew Ahrens 17833b2aab18SMatthew Ahrens error = spa_open(fsname, &spa, FTAG); 17843b2aab18SMatthew Ahrens if (error != 0) 17853b2aab18SMatthew Ahrens return (error); 17863b2aab18SMatthew Ahrens needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP); 17873b2aab18SMatthew Ahrens spa_close(spa, FTAG); 17883b2aab18SMatthew Ahrens 17893b2aab18SMatthew Ahrens if (needsuspend) { 17903b2aab18SMatthew Ahrens error = zil_suspend(fsname, &cookie); 17913b2aab18SMatthew Ahrens if (error != 0) 17923b2aab18SMatthew Ahrens return (error); 17933b2aab18SMatthew Ahrens } 17943b2aab18SMatthew Ahrens 17953b2aab18SMatthew Ahrens error = dsl_sync_task(fsname, dsl_dataset_snapshot_tmp_check, 17967d46dc6cSMatthew Ahrens dsl_dataset_snapshot_tmp_sync, &ddsta, 3, ZFS_SPACE_CHECK_RESERVED); 17973b2aab18SMatthew Ahrens 17983b2aab18SMatthew Ahrens if (needsuspend) 17993b2aab18SMatthew Ahrens zil_resume(cookie); 18003b2aab18SMatthew Ahrens return (error); 18013b2aab18SMatthew Ahrens } 18023b2aab18SMatthew Ahrens 18033b2aab18SMatthew Ahrens void 18043b2aab18SMatthew Ahrens dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) 18053b2aab18SMatthew Ahrens { 18063b2aab18SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 18073b2aab18SMatthew Ahrens ASSERT(ds->ds_objset != NULL); 1808c1379625SJustin T. Gibbs ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0); 18093b2aab18SMatthew Ahrens 18103b2aab18SMatthew Ahrens /* 18113b2aab18SMatthew Ahrens * in case we had to change ds_fsid_guid when we opened it, 18123b2aab18SMatthew Ahrens * sync it out now. 18133b2aab18SMatthew Ahrens */ 18143b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 1815c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; 18163b2aab18SMatthew Ahrens 18179c3fd121SMatthew Ahrens if (ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] != 0) { 18189c3fd121SMatthew Ahrens VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, 18199c3fd121SMatthew Ahrens ds->ds_object, DS_FIELD_RESUME_OBJECT, 8, 1, 18209c3fd121SMatthew Ahrens &ds->ds_resume_object[tx->tx_txg & TXG_MASK], tx)); 18219c3fd121SMatthew Ahrens VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, 18229c3fd121SMatthew Ahrens ds->ds_object, DS_FIELD_RESUME_OFFSET, 8, 1, 18239c3fd121SMatthew Ahrens &ds->ds_resume_offset[tx->tx_txg & TXG_MASK], tx)); 18249c3fd121SMatthew Ahrens VERIFY0(zap_update(tx->tx_pool->dp_meta_objset, 18259c3fd121SMatthew Ahrens ds->ds_object, DS_FIELD_RESUME_BYTES, 8, 1, 18269c3fd121SMatthew Ahrens &ds->ds_resume_bytes[tx->tx_txg & TXG_MASK], tx)); 18279c3fd121SMatthew Ahrens ds->ds_resume_object[tx->tx_txg & TXG_MASK] = 0; 18289c3fd121SMatthew Ahrens ds->ds_resume_offset[tx->tx_txg & TXG_MASK] = 0; 18299c3fd121SMatthew Ahrens ds->ds_resume_bytes[tx->tx_txg & TXG_MASK] = 0; 18309c3fd121SMatthew Ahrens } 18319c3fd121SMatthew Ahrens 18323b2aab18SMatthew Ahrens dmu_objset_sync(ds->ds_objset, zio, tx); 1833b5152584SMatthew Ahrens 1834ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 1835ca0cc391SMatthew Ahrens if (ds->ds_feature_activation_needed[f]) { 1836ca0cc391SMatthew Ahrens if (ds->ds_feature_inuse[f]) 1837ca0cc391SMatthew Ahrens continue; 1838ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(ds->ds_object, f, tx); 1839ca0cc391SMatthew Ahrens ds->ds_feature_inuse[f] = B_TRUE; 1840ca0cc391SMatthew Ahrens } 1841b5152584SMatthew Ahrens } 18423b2aab18SMatthew Ahrens } 18433b2aab18SMatthew Ahrens 1844bfaed0b9SAndriy Gapon static int 1845bfaed0b9SAndriy Gapon deadlist_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 1846bfaed0b9SAndriy Gapon { 1847bfaed0b9SAndriy Gapon dsl_deadlist_t *dl = arg; 1848bfaed0b9SAndriy Gapon dsl_deadlist_insert(dl, bp, tx); 1849bfaed0b9SAndriy Gapon return (0); 1850bfaed0b9SAndriy Gapon } 1851bfaed0b9SAndriy Gapon 1852bfaed0b9SAndriy Gapon void 1853bfaed0b9SAndriy Gapon dsl_dataset_sync_done(dsl_dataset_t *ds, dmu_tx_t *tx) 1854bfaed0b9SAndriy Gapon { 1855bfaed0b9SAndriy Gapon objset_t *os = ds->ds_objset; 1856bfaed0b9SAndriy Gapon 1857bfaed0b9SAndriy Gapon bplist_iterate(&ds->ds_pending_deadlist, 1858bfaed0b9SAndriy Gapon deadlist_enqueue_cb, &ds->ds_deadlist, tx); 1859bfaed0b9SAndriy Gapon 186094c2d0ebSMatthew Ahrens if (os->os_synced_dnodes != NULL) { 186194c2d0ebSMatthew Ahrens multilist_destroy(os->os_synced_dnodes); 186294c2d0ebSMatthew Ahrens os->os_synced_dnodes = NULL; 186394c2d0ebSMatthew Ahrens } 186494c2d0ebSMatthew Ahrens 1865*eb633035STom Caputi if (os->os_encrypted) 1866*eb633035STom Caputi os->os_next_write_raw[tx->tx_txg & TXG_MASK] = B_FALSE; 1867*eb633035STom Caputi else 1868*eb633035STom Caputi ASSERT0(os->os_next_write_raw[tx->tx_txg & TXG_MASK]); 1869*eb633035STom Caputi 1870bfaed0b9SAndriy Gapon ASSERT(!dmu_objset_is_dirty(os, dmu_tx_get_txg(tx))); 1871bfaed0b9SAndriy Gapon 1872bfaed0b9SAndriy Gapon dmu_buf_rele(ds->ds_dbuf, ds); 1873bfaed0b9SAndriy Gapon } 1874bfaed0b9SAndriy Gapon 1875dfc11533SChris Williamson int 1876dfc11533SChris Williamson get_clones_stat_impl(dsl_dataset_t *ds, nvlist_t *val) 18773b2aab18SMatthew Ahrens { 18783b2aab18SMatthew Ahrens uint64_t count = 0; 18793b2aab18SMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 18803b2aab18SMatthew Ahrens zap_cursor_t zc; 18813b2aab18SMatthew Ahrens zap_attribute_t za; 18823b2aab18SMatthew Ahrens 18833b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); 188419b94df9SMatthew Ahrens 188519b94df9SMatthew Ahrens /* 18863b2aab18SMatthew Ahrens * There may be missing entries in ds_next_clones_obj 188719b94df9SMatthew Ahrens * due to a bug in a previous version of the code. 188819b94df9SMatthew Ahrens * Only trust it if it has the right number of entries. 188919b94df9SMatthew Ahrens */ 1890c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_clones_obj != 0) { 1891c1379625SJustin T. Gibbs VERIFY0(zap_count(mos, dsl_dataset_phys(ds)->ds_next_clones_obj, 189219b94df9SMatthew Ahrens &count)); 189319b94df9SMatthew Ahrens } 1894dfc11533SChris Williamson if (count != dsl_dataset_phys(ds)->ds_num_children - 1) { 1895dfc11533SChris Williamson return (ENOENT); 1896dfc11533SChris Williamson } 1897c1379625SJustin T. Gibbs for (zap_cursor_init(&zc, mos, 1898c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_next_clones_obj); 189919b94df9SMatthew Ahrens zap_cursor_retrieve(&zc, &za) == 0; 190019b94df9SMatthew Ahrens zap_cursor_advance(&zc)) { 190119b94df9SMatthew Ahrens dsl_dataset_t *clone; 19029adfa60dSMatthew Ahrens char buf[ZFS_MAX_DATASET_NAME_LEN]; 19033b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool, 19043b2aab18SMatthew Ahrens za.za_first_integer, FTAG, &clone)); 190519b94df9SMatthew Ahrens dsl_dir_name(clone->ds_dir, buf); 19063b2aab18SMatthew Ahrens fnvlist_add_boolean(val, buf); 190719b94df9SMatthew Ahrens dsl_dataset_rele(clone, FTAG); 190819b94df9SMatthew Ahrens } 190919b94df9SMatthew Ahrens zap_cursor_fini(&zc); 1910dfc11533SChris Williamson return (0); 191119b94df9SMatthew Ahrens } 191219b94df9SMatthew Ahrens 1913dfc11533SChris Williamson void 1914dfc11533SChris Williamson get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv) 1915dfc11533SChris Williamson { 1916dfc11533SChris Williamson nvlist_t *propval = fnvlist_alloc(); 1917dfc11533SChris Williamson nvlist_t *val; 1918dfc11533SChris Williamson 1919dfc11533SChris Williamson /* 1920dfc11533SChris Williamson * We use nvlist_alloc() instead of fnvlist_alloc() because the 1921dfc11533SChris Williamson * latter would allocate the list with NV_UNIQUE_NAME flag. 1922dfc11533SChris Williamson * As a result, every time a clone name is appended to the list 1923dfc11533SChris Williamson * it would be (linearly) searched for for a duplicate name. 1924dfc11533SChris Williamson * We already know that all clone names must be unique and we 1925dfc11533SChris Williamson * want avoid the quadratic complexity of double-checking that 1926dfc11533SChris Williamson * because we can have a large number of clones. 1927dfc11533SChris Williamson */ 1928dfc11533SChris Williamson VERIFY0(nvlist_alloc(&val, 0, KM_SLEEP)); 1929dfc11533SChris Williamson 1930dfc11533SChris Williamson if (get_clones_stat_impl(ds, val) == 0) { 1931dfc11533SChris Williamson fnvlist_add_nvlist(propval, ZPROP_VALUE, val); 1932dfc11533SChris Williamson fnvlist_add_nvlist(nv, zfs_prop_to_name(ZFS_PROP_CLONES), 1933dfc11533SChris Williamson propval); 1934dfc11533SChris Williamson } 19357d3000f7SPavel Zakharov 19367d3000f7SPavel Zakharov nvlist_free(val); 19377d3000f7SPavel Zakharov nvlist_free(propval); 1938dfc11533SChris Williamson } 1939dfc11533SChris Williamson 1940dfc11533SChris Williamson /* 1941dfc11533SChris Williamson * Returns a string that represents the receive resume stats token. It should 1942dfc11533SChris Williamson * be freed with strfree(). 1943dfc11533SChris Williamson */ 1944dfc11533SChris Williamson char * 1945dfc11533SChris Williamson get_receive_resume_stats_impl(dsl_dataset_t *ds) 19469c3fd121SMatthew Ahrens { 19479c3fd121SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 19489c3fd121SMatthew Ahrens 19499c3fd121SMatthew Ahrens if (dsl_dataset_has_resume_receive_state(ds)) { 19509c3fd121SMatthew Ahrens char *str; 19519c3fd121SMatthew Ahrens void *packed; 19529c3fd121SMatthew Ahrens uint8_t *compressed; 19539c3fd121SMatthew Ahrens uint64_t val; 19549c3fd121SMatthew Ahrens nvlist_t *token_nv = fnvlist_alloc(); 19559c3fd121SMatthew Ahrens size_t packed_size, compressed_size; 19569c3fd121SMatthew Ahrens 19579c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 19589c3fd121SMatthew Ahrens DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val) == 0) { 19599c3fd121SMatthew Ahrens fnvlist_add_uint64(token_nv, "fromguid", val); 19609c3fd121SMatthew Ahrens } 19619c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 19629c3fd121SMatthew Ahrens DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val) == 0) { 19639c3fd121SMatthew Ahrens fnvlist_add_uint64(token_nv, "object", val); 19649c3fd121SMatthew Ahrens } 19659c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 19669c3fd121SMatthew Ahrens DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val) == 0) { 19679c3fd121SMatthew Ahrens fnvlist_add_uint64(token_nv, "offset", val); 19689c3fd121SMatthew Ahrens } 19699c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 19709c3fd121SMatthew Ahrens DS_FIELD_RESUME_BYTES, sizeof (val), 1, &val) == 0) { 19719c3fd121SMatthew Ahrens fnvlist_add_uint64(token_nv, "bytes", val); 19729c3fd121SMatthew Ahrens } 19739c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 19749c3fd121SMatthew Ahrens DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val) == 0) { 19759c3fd121SMatthew Ahrens fnvlist_add_uint64(token_nv, "toguid", val); 19769c3fd121SMatthew Ahrens } 19779c3fd121SMatthew Ahrens char buf[256]; 19789c3fd121SMatthew Ahrens if (zap_lookup(dp->dp_meta_objset, ds->ds_object, 19799c3fd121SMatthew Ahrens DS_FIELD_RESUME_TONAME, 1, sizeof (buf), buf) == 0) { 19809c3fd121SMatthew Ahrens fnvlist_add_string(token_nv, "toname", buf); 19819c3fd121SMatthew Ahrens } 19825602294fSDan Kimmel if (zap_contains(dp->dp_meta_objset, ds->ds_object, 19835602294fSDan Kimmel DS_FIELD_RESUME_LARGEBLOCK) == 0) { 19845602294fSDan Kimmel fnvlist_add_boolean(token_nv, "largeblockok"); 19855602294fSDan Kimmel } 19869c3fd121SMatthew Ahrens if (zap_contains(dp->dp_meta_objset, ds->ds_object, 19879c3fd121SMatthew Ahrens DS_FIELD_RESUME_EMBEDOK) == 0) { 19889c3fd121SMatthew Ahrens fnvlist_add_boolean(token_nv, "embedok"); 19899c3fd121SMatthew Ahrens } 19905602294fSDan Kimmel if (zap_contains(dp->dp_meta_objset, ds->ds_object, 19915602294fSDan Kimmel DS_FIELD_RESUME_COMPRESSOK) == 0) { 19925602294fSDan Kimmel fnvlist_add_boolean(token_nv, "compressok"); 19935602294fSDan Kimmel } 1994*eb633035STom Caputi if (zap_contains(dp->dp_meta_objset, ds->ds_object, 1995*eb633035STom Caputi DS_FIELD_RESUME_RAWOK) == 0) { 1996*eb633035STom Caputi fnvlist_add_boolean(token_nv, "rawok"); 1997*eb633035STom Caputi } 19989c3fd121SMatthew Ahrens packed = fnvlist_pack(token_nv, &packed_size); 19999c3fd121SMatthew Ahrens fnvlist_free(token_nv); 20009c3fd121SMatthew Ahrens compressed = kmem_alloc(packed_size, KM_SLEEP); 20019c3fd121SMatthew Ahrens 20029c3fd121SMatthew Ahrens compressed_size = gzip_compress(packed, compressed, 20039c3fd121SMatthew Ahrens packed_size, packed_size, 6); 20049c3fd121SMatthew Ahrens 20059c3fd121SMatthew Ahrens zio_cksum_t cksum; 20069c3fd121SMatthew Ahrens fletcher_4_native(compressed, compressed_size, NULL, &cksum); 20079c3fd121SMatthew Ahrens 20089c3fd121SMatthew Ahrens str = kmem_alloc(compressed_size * 2 + 1, KM_SLEEP); 20099c3fd121SMatthew Ahrens for (int i = 0; i < compressed_size; i++) { 20109c3fd121SMatthew Ahrens (void) sprintf(str + i * 2, "%02x", compressed[i]); 20119c3fd121SMatthew Ahrens } 20129c3fd121SMatthew Ahrens str[compressed_size * 2] = '\0'; 20139c3fd121SMatthew Ahrens char *propval = kmem_asprintf("%u-%llx-%llx-%s", 20149c3fd121SMatthew Ahrens ZFS_SEND_RESUME_TOKEN_VERSION, 20159c3fd121SMatthew Ahrens (longlong_t)cksum.zc_word[0], 20169c3fd121SMatthew Ahrens (longlong_t)packed_size, str); 20179c3fd121SMatthew Ahrens kmem_free(packed, packed_size); 20189c3fd121SMatthew Ahrens kmem_free(str, compressed_size * 2 + 1); 20199c3fd121SMatthew Ahrens kmem_free(compressed, packed_size); 2020dfc11533SChris Williamson return (propval); 2021dfc11533SChris Williamson } 2022dfc11533SChris Williamson return (strdup("")); 2023dfc11533SChris Williamson } 2024dfc11533SChris Williamson 2025dfc11533SChris Williamson /* 2026dfc11533SChris Williamson * Returns a string that represents the receive resume stats token of the 2027dfc11533SChris Williamson * dataset's child. It should be freed with strfree(). 2028dfc11533SChris Williamson */ 2029dfc11533SChris Williamson char * 2030dfc11533SChris Williamson get_child_receive_stats(dsl_dataset_t *ds) 2031dfc11533SChris Williamson { 2032dfc11533SChris Williamson char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; 2033dfc11533SChris Williamson dsl_dataset_t *recv_ds; 2034dfc11533SChris Williamson dsl_dataset_name(ds, recvname); 2035dfc11533SChris Williamson if (strlcat(recvname, "/", sizeof (recvname)) < 2036dfc11533SChris Williamson sizeof (recvname) && 2037dfc11533SChris Williamson strlcat(recvname, recv_clone_name, sizeof (recvname)) < 2038dfc11533SChris Williamson sizeof (recvname) && 2039dfc11533SChris Williamson dsl_dataset_hold(ds->ds_dir->dd_pool, recvname, FTAG, 2040dfc11533SChris Williamson &recv_ds) == 0) { 2041dfc11533SChris Williamson char *propval = get_receive_resume_stats_impl(recv_ds); 2042dfc11533SChris Williamson dsl_dataset_rele(recv_ds, FTAG); 2043dfc11533SChris Williamson return (propval); 2044dfc11533SChris Williamson } 2045dfc11533SChris Williamson return (strdup("")); 2046dfc11533SChris Williamson } 2047dfc11533SChris Williamson 2048dfc11533SChris Williamson static void 2049dfc11533SChris Williamson get_receive_resume_stats(dsl_dataset_t *ds, nvlist_t *nv) 2050dfc11533SChris Williamson { 2051dfc11533SChris Williamson char *propval = get_receive_resume_stats_impl(ds); 2052dfc11533SChris Williamson if (strcmp(propval, "") != 0) { 2053dfc11533SChris Williamson dsl_prop_nvlist_add_string(nv, 2054dfc11533SChris Williamson ZFS_PROP_RECEIVE_RESUME_TOKEN, propval); 2055dfc11533SChris Williamson } else { 2056dfc11533SChris Williamson char *childval = get_child_receive_stats(ds); 2057dfc11533SChris Williamson if (strcmp(childval, "") != 0) { 2058dfc11533SChris Williamson dsl_prop_nvlist_add_string(nv, 2059dfc11533SChris Williamson ZFS_PROP_RECEIVE_RESUME_TOKEN, childval); 2060dfc11533SChris Williamson } 2061dfc11533SChris Williamson strfree(childval); 20629c3fd121SMatthew Ahrens } 2063dfc11533SChris Williamson strfree(propval); 2064dfc11533SChris Williamson } 2065dfc11533SChris Williamson 2066dfc11533SChris Williamson uint64_t 2067dfc11533SChris Williamson dsl_get_refratio(dsl_dataset_t *ds) 2068dfc11533SChris Williamson { 2069dfc11533SChris Williamson uint64_t ratio = dsl_dataset_phys(ds)->ds_compressed_bytes == 0 ? 100 : 2070dfc11533SChris Williamson (dsl_dataset_phys(ds)->ds_uncompressed_bytes * 100 / 2071dfc11533SChris Williamson dsl_dataset_phys(ds)->ds_compressed_bytes); 2072dfc11533SChris Williamson return (ratio); 2073dfc11533SChris Williamson } 2074dfc11533SChris Williamson 2075dfc11533SChris Williamson uint64_t 2076dfc11533SChris Williamson dsl_get_logicalreferenced(dsl_dataset_t *ds) 2077dfc11533SChris Williamson { 2078dfc11533SChris Williamson return (dsl_dataset_phys(ds)->ds_uncompressed_bytes); 2079dfc11533SChris Williamson } 2080dfc11533SChris Williamson 2081dfc11533SChris Williamson uint64_t 2082dfc11533SChris Williamson dsl_get_compressratio(dsl_dataset_t *ds) 2083dfc11533SChris Williamson { 2084dfc11533SChris Williamson if (ds->ds_is_snapshot) { 2085dfc11533SChris Williamson return (dsl_get_refratio(ds)); 2086dfc11533SChris Williamson } else { 2087dfc11533SChris Williamson dsl_dir_t *dd = ds->ds_dir; 2088dfc11533SChris Williamson mutex_enter(&dd->dd_lock); 2089dfc11533SChris Williamson uint64_t val = dsl_dir_get_compressratio(dd); 2090dfc11533SChris Williamson mutex_exit(&dd->dd_lock); 2091dfc11533SChris Williamson return (val); 2092dfc11533SChris Williamson } 2093dfc11533SChris Williamson } 2094dfc11533SChris Williamson 2095dfc11533SChris Williamson uint64_t 2096dfc11533SChris Williamson dsl_get_used(dsl_dataset_t *ds) 2097dfc11533SChris Williamson { 2098dfc11533SChris Williamson if (ds->ds_is_snapshot) { 2099dfc11533SChris Williamson return (dsl_dataset_phys(ds)->ds_unique_bytes); 2100dfc11533SChris Williamson } else { 2101dfc11533SChris Williamson dsl_dir_t *dd = ds->ds_dir; 2102dfc11533SChris Williamson mutex_enter(&dd->dd_lock); 2103dfc11533SChris Williamson uint64_t val = dsl_dir_get_used(dd); 2104dfc11533SChris Williamson mutex_exit(&dd->dd_lock); 2105dfc11533SChris Williamson return (val); 2106dfc11533SChris Williamson } 2107dfc11533SChris Williamson } 2108dfc11533SChris Williamson 2109dfc11533SChris Williamson uint64_t 2110dfc11533SChris Williamson dsl_get_creation(dsl_dataset_t *ds) 2111dfc11533SChris Williamson { 2112dfc11533SChris Williamson return (dsl_dataset_phys(ds)->ds_creation_time); 2113dfc11533SChris Williamson } 2114dfc11533SChris Williamson 2115dfc11533SChris Williamson uint64_t 2116dfc11533SChris Williamson dsl_get_creationtxg(dsl_dataset_t *ds) 2117dfc11533SChris Williamson { 2118dfc11533SChris Williamson return (dsl_dataset_phys(ds)->ds_creation_txg); 2119dfc11533SChris Williamson } 2120dfc11533SChris Williamson 2121dfc11533SChris Williamson uint64_t 2122dfc11533SChris Williamson dsl_get_refquota(dsl_dataset_t *ds) 2123dfc11533SChris Williamson { 2124dfc11533SChris Williamson return (ds->ds_quota); 2125dfc11533SChris Williamson } 2126dfc11533SChris Williamson 2127dfc11533SChris Williamson uint64_t 2128dfc11533SChris Williamson dsl_get_refreservation(dsl_dataset_t *ds) 2129dfc11533SChris Williamson { 2130dfc11533SChris Williamson return (ds->ds_reserved); 2131dfc11533SChris Williamson } 2132dfc11533SChris Williamson 2133dfc11533SChris Williamson uint64_t 2134dfc11533SChris Williamson dsl_get_guid(dsl_dataset_t *ds) 2135dfc11533SChris Williamson { 2136dfc11533SChris Williamson return (dsl_dataset_phys(ds)->ds_guid); 2137dfc11533SChris Williamson } 2138dfc11533SChris Williamson 2139dfc11533SChris Williamson uint64_t 2140dfc11533SChris Williamson dsl_get_unique(dsl_dataset_t *ds) 2141dfc11533SChris Williamson { 2142dfc11533SChris Williamson return (dsl_dataset_phys(ds)->ds_unique_bytes); 2143dfc11533SChris Williamson } 2144dfc11533SChris Williamson 2145dfc11533SChris Williamson uint64_t 2146dfc11533SChris Williamson dsl_get_objsetid(dsl_dataset_t *ds) 2147dfc11533SChris Williamson { 2148dfc11533SChris Williamson return (ds->ds_object); 2149dfc11533SChris Williamson } 2150dfc11533SChris Williamson 2151dfc11533SChris Williamson uint64_t 2152dfc11533SChris Williamson dsl_get_userrefs(dsl_dataset_t *ds) 2153dfc11533SChris Williamson { 2154dfc11533SChris Williamson return (ds->ds_userrefs); 2155dfc11533SChris Williamson } 2156dfc11533SChris Williamson 2157dfc11533SChris Williamson uint64_t 2158dfc11533SChris Williamson dsl_get_defer_destroy(dsl_dataset_t *ds) 2159dfc11533SChris Williamson { 2160dfc11533SChris Williamson return (DS_IS_DEFER_DESTROY(ds) ? 1 : 0); 2161dfc11533SChris Williamson } 2162dfc11533SChris Williamson 2163dfc11533SChris Williamson uint64_t 2164dfc11533SChris Williamson dsl_get_referenced(dsl_dataset_t *ds) 2165dfc11533SChris Williamson { 2166dfc11533SChris Williamson return (dsl_dataset_phys(ds)->ds_referenced_bytes); 2167dfc11533SChris Williamson } 2168dfc11533SChris Williamson 2169dfc11533SChris Williamson uint64_t 2170dfc11533SChris Williamson dsl_get_numclones(dsl_dataset_t *ds) 2171dfc11533SChris Williamson { 2172dfc11533SChris Williamson ASSERT(ds->ds_is_snapshot); 2173dfc11533SChris Williamson return (dsl_dataset_phys(ds)->ds_num_children - 1); 2174dfc11533SChris Williamson } 2175dfc11533SChris Williamson 2176dfc11533SChris Williamson uint64_t 2177dfc11533SChris Williamson dsl_get_inconsistent(dsl_dataset_t *ds) 2178dfc11533SChris Williamson { 2179dfc11533SChris Williamson return ((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT) ? 2180dfc11533SChris Williamson 1 : 0); 2181dfc11533SChris Williamson } 2182dfc11533SChris Williamson 2183dfc11533SChris Williamson uint64_t 2184dfc11533SChris Williamson dsl_get_available(dsl_dataset_t *ds) 2185dfc11533SChris Williamson { 2186dfc11533SChris Williamson uint64_t refdbytes = dsl_get_referenced(ds); 2187dfc11533SChris Williamson uint64_t availbytes = dsl_dir_space_available(ds->ds_dir, 2188dfc11533SChris Williamson NULL, 0, TRUE); 2189dfc11533SChris Williamson if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { 2190dfc11533SChris Williamson availbytes += 2191dfc11533SChris Williamson ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; 2192dfc11533SChris Williamson } 2193dfc11533SChris Williamson if (ds->ds_quota != 0) { 2194dfc11533SChris Williamson /* 2195dfc11533SChris Williamson * Adjust available bytes according to refquota 2196dfc11533SChris Williamson */ 2197dfc11533SChris Williamson if (refdbytes < ds->ds_quota) { 2198dfc11533SChris Williamson availbytes = MIN(availbytes, 2199dfc11533SChris Williamson ds->ds_quota - refdbytes); 2200dfc11533SChris Williamson } else { 2201dfc11533SChris Williamson availbytes = 0; 2202dfc11533SChris Williamson } 2203dfc11533SChris Williamson } 2204dfc11533SChris Williamson return (availbytes); 2205dfc11533SChris Williamson } 2206dfc11533SChris Williamson 2207dfc11533SChris Williamson int 2208dfc11533SChris Williamson dsl_get_written(dsl_dataset_t *ds, uint64_t *written) 2209dfc11533SChris Williamson { 2210dfc11533SChris Williamson dsl_pool_t *dp = ds->ds_dir->dd_pool; 2211dfc11533SChris Williamson dsl_dataset_t *prev; 2212dfc11533SChris Williamson int err = dsl_dataset_hold_obj(dp, 2213dfc11533SChris Williamson dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); 2214dfc11533SChris Williamson if (err == 0) { 2215dfc11533SChris Williamson uint64_t comp, uncomp; 2216dfc11533SChris Williamson err = dsl_dataset_space_written(prev, ds, written, 2217dfc11533SChris Williamson &comp, &uncomp); 2218dfc11533SChris Williamson dsl_dataset_rele(prev, FTAG); 2219dfc11533SChris Williamson } 2220dfc11533SChris Williamson return (err); 2221dfc11533SChris Williamson } 2222dfc11533SChris Williamson 2223dfc11533SChris Williamson /* 2224dfc11533SChris Williamson * 'snap' should be a buffer of size ZFS_MAX_DATASET_NAME_LEN. 2225dfc11533SChris Williamson */ 2226dfc11533SChris Williamson int 2227dfc11533SChris Williamson dsl_get_prev_snap(dsl_dataset_t *ds, char *snap) 2228dfc11533SChris Williamson { 2229dfc11533SChris Williamson dsl_pool_t *dp = ds->ds_dir->dd_pool; 2230dfc11533SChris Williamson if (ds->ds_prev != NULL && ds->ds_prev != dp->dp_origin_snap) { 2231dfc11533SChris Williamson dsl_dataset_name(ds->ds_prev, snap); 2232dfc11533SChris Williamson return (0); 2233dfc11533SChris Williamson } else { 2234dfc11533SChris Williamson return (ENOENT); 2235dfc11533SChris Williamson } 2236dfc11533SChris Williamson } 2237dfc11533SChris Williamson 2238dfc11533SChris Williamson /* 2239dfc11533SChris Williamson * Returns the mountpoint property and source for the given dataset in the value 2240dfc11533SChris Williamson * and source buffers. The value buffer must be at least as large as MAXPATHLEN 2241dfc11533SChris Williamson * and the source buffer as least as large a ZFS_MAX_DATASET_NAME_LEN. 2242dfc11533SChris Williamson * Returns 0 on success and an error on failure. 2243dfc11533SChris Williamson */ 2244dfc11533SChris Williamson int 2245dfc11533SChris Williamson dsl_get_mountpoint(dsl_dataset_t *ds, const char *dsname, char *value, 2246dfc11533SChris Williamson char *source) 2247dfc11533SChris Williamson { 2248dfc11533SChris Williamson int error; 2249dfc11533SChris Williamson dsl_pool_t *dp = ds->ds_dir->dd_pool; 2250dfc11533SChris Williamson 2251dfc11533SChris Williamson /* Retrieve the mountpoint value stored in the zap opbject */ 2252dfc11533SChris Williamson error = dsl_prop_get_ds(ds, zfs_prop_to_name(ZFS_PROP_MOUNTPOINT), 1, 2253dfc11533SChris Williamson ZAP_MAXVALUELEN, value, source); 2254dfc11533SChris Williamson if (error != 0) { 2255dfc11533SChris Williamson return (error); 2256dfc11533SChris Williamson } 2257dfc11533SChris Williamson 2258f91fcf59SToomas Soome /* 2259f91fcf59SToomas Soome * Process the dsname and source to find the full mountpoint string. 2260f91fcf59SToomas Soome * Can be skipped for 'legacy' or 'none'. 2261f91fcf59SToomas Soome */ 2262dfc11533SChris Williamson if (value[0] == '/') { 2263dfc11533SChris Williamson char *buf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP); 2264dfc11533SChris Williamson char *root = buf; 2265dfc11533SChris Williamson const char *relpath; 2266dfc11533SChris Williamson 2267dfc11533SChris Williamson /* 2268dfc11533SChris Williamson * If we inherit the mountpoint, even from a dataset 2269dfc11533SChris Williamson * with a received value, the source will be the path of 2270dfc11533SChris Williamson * the dataset we inherit from. If source is 2271dfc11533SChris Williamson * ZPROP_SOURCE_VAL_RECVD, the received value is not 2272dfc11533SChris Williamson * inherited. 2273dfc11533SChris Williamson */ 2274dfc11533SChris Williamson if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2275dfc11533SChris Williamson relpath = ""; 2276dfc11533SChris Williamson } else { 2277dfc11533SChris Williamson ASSERT0(strncmp(dsname, source, strlen(source))); 2278dfc11533SChris Williamson relpath = dsname + strlen(source); 2279dfc11533SChris Williamson if (relpath[0] == '/') 2280dfc11533SChris Williamson relpath++; 2281dfc11533SChris Williamson } 2282dfc11533SChris Williamson 2283dfc11533SChris Williamson spa_altroot(dp->dp_spa, root, ZAP_MAXVALUELEN); 2284dfc11533SChris Williamson 2285dfc11533SChris Williamson /* 2286dfc11533SChris Williamson * Special case an alternate root of '/'. This will 2287dfc11533SChris Williamson * avoid having multiple leading slashes in the 2288dfc11533SChris Williamson * mountpoint path. 2289dfc11533SChris Williamson */ 2290dfc11533SChris Williamson if (strcmp(root, "/") == 0) 2291dfc11533SChris Williamson root++; 2292dfc11533SChris Williamson 2293dfc11533SChris Williamson /* 2294dfc11533SChris Williamson * If the mountpoint is '/' then skip over this 2295dfc11533SChris Williamson * if we are obtaining either an alternate root or 2296dfc11533SChris Williamson * an inherited mountpoint. 2297dfc11533SChris Williamson */ 2298dfc11533SChris Williamson char *mnt = value; 2299dfc11533SChris Williamson if (value[1] == '\0' && (root[0] != '\0' || 2300dfc11533SChris Williamson relpath[0] != '\0')) 2301dfc11533SChris Williamson mnt = value + 1; 2302dfc11533SChris Williamson 2303dfc11533SChris Williamson if (relpath[0] == '\0') { 2304dfc11533SChris Williamson (void) snprintf(value, ZAP_MAXVALUELEN, "%s%s", 2305dfc11533SChris Williamson root, mnt); 2306dfc11533SChris Williamson } else { 2307dfc11533SChris Williamson (void) snprintf(value, ZAP_MAXVALUELEN, "%s%s%s%s", 2308dfc11533SChris Williamson root, mnt, relpath[0] == '@' ? "" : "/", 2309dfc11533SChris Williamson relpath); 2310dfc11533SChris Williamson } 2311dfc11533SChris Williamson kmem_free(buf, ZAP_MAXVALUELEN); 2312dfc11533SChris Williamson } 2313f91fcf59SToomas Soome 2314dfc11533SChris Williamson return (0); 23159c3fd121SMatthew Ahrens } 23169c3fd121SMatthew Ahrens 2317fa9e4066Sahrens void 2318a2eea2e1Sahrens dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) 2319fa9e4066Sahrens { 2320*eb633035STom Caputi int err; 23213b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 2322a9799022Sck 23233b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 23243b2aab18SMatthew Ahrens 2325dfc11533SChris Williamson dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, 2326dfc11533SChris Williamson dsl_get_refratio(ds)); 232777372cb0SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_LOGICALREFERENCED, 2328dfc11533SChris Williamson dsl_get_logicalreferenced(ds)); 2329dfc11533SChris Williamson dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, 2330dfc11533SChris Williamson dsl_get_compressratio(ds)); 2331dfc11533SChris Williamson dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, 2332dfc11533SChris Williamson dsl_get_used(ds)); 23334445fffbSMatthew Ahrens 2334bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 23354445fffbSMatthew Ahrens get_clones_stat(ds, nv); 23364445fffbSMatthew Ahrens } else { 2337dfc11533SChris Williamson char buf[ZFS_MAX_DATASET_NAME_LEN]; 2338dfc11533SChris Williamson if (dsl_get_prev_snap(ds, buf) == 0) 2339dfc11533SChris Williamson dsl_prop_nvlist_add_string(nv, ZFS_PROP_PREV_SNAP, 2340dfc11533SChris Williamson buf); 23414445fffbSMatthew Ahrens dsl_dir_stats(ds->ds_dir, nv); 23424445fffbSMatthew Ahrens } 2343fa9e4066Sahrens 2344dfc11533SChris Williamson dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, 2345dfc11533SChris Williamson dsl_get_available(ds)); 2346dfc11533SChris Williamson dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, 2347dfc11533SChris Williamson dsl_get_referenced(ds)); 2348a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, 2349dfc11533SChris Williamson dsl_get_creation(ds)); 2350a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, 2351dfc11533SChris Williamson dsl_get_creationtxg(ds)); 2352a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, 2353dfc11533SChris Williamson dsl_get_refquota(ds)); 2354a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, 2355dfc11533SChris Williamson dsl_get_refreservation(ds)); 2356c5904d13Seschrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, 2357dfc11533SChris Williamson dsl_get_guid(ds)); 23581d713200SEric Schrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE, 2359dfc11533SChris Williamson dsl_get_unique(ds)); 23601d713200SEric Schrock dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID, 2361dfc11533SChris Williamson dsl_get_objsetid(ds)); 236292241e0bSTom Erickson dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS, 2363dfc11533SChris Williamson dsl_get_userrefs(ds)); 2364842727c2SChris Kirby dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY, 2365*eb633035STom Caputi DS_IS_DEFER_DESTROY(ds) ? 1 : 0); 2366*eb633035STom Caputi dsl_dataset_crypt_stats(ds, nv); 2367fa9e4066Sahrens 2368c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) { 2369*eb633035STom Caputi uint64_t written, comp, uncomp; 2370*eb633035STom Caputi dsl_pool_t *dp = ds->ds_dir->dd_pool; 2371*eb633035STom Caputi dsl_dataset_t *prev; 2372*eb633035STom Caputi 2373*eb633035STom Caputi err = dsl_dataset_hold_obj(dp, 2374*eb633035STom Caputi dsl_dataset_phys(ds)->ds_prev_snap_obj, FTAG, &prev); 2375*eb633035STom Caputi if (err == 0) { 2376*eb633035STom Caputi err = dsl_dataset_space_written(prev, ds, &written, 2377*eb633035STom Caputi &comp, &uncomp); 2378*eb633035STom Caputi dsl_dataset_rele(prev, FTAG); 2379*eb633035STom Caputi if (err == 0) { 2380*eb633035STom Caputi dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_WRITTEN, 2381*eb633035STom Caputi written); 2382*eb633035STom Caputi } 238319b94df9SMatthew Ahrens } 238419b94df9SMatthew Ahrens } 23859c3fd121SMatthew Ahrens 23869c3fd121SMatthew Ahrens if (!dsl_dataset_is_snapshot(ds)) { 23879c3fd121SMatthew Ahrens /* 23889c3fd121SMatthew Ahrens * A failed "newfs" (e.g. full) resumable receive leaves 23899c3fd121SMatthew Ahrens * the stats set on this dataset. Check here for the prop. 23909c3fd121SMatthew Ahrens */ 23919c3fd121SMatthew Ahrens get_receive_resume_stats(ds, nv); 23929c3fd121SMatthew Ahrens 23939c3fd121SMatthew Ahrens /* 23949c3fd121SMatthew Ahrens * A failed incremental resumable receive leaves the 23959c3fd121SMatthew Ahrens * stats set on our child named "%recv". Check the child 23969c3fd121SMatthew Ahrens * for the prop. 23979c3fd121SMatthew Ahrens */ 23989adfa60dSMatthew Ahrens /* 6 extra bytes for /%recv */ 23999adfa60dSMatthew Ahrens char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; 24009c3fd121SMatthew Ahrens dsl_dataset_t *recv_ds; 24019c3fd121SMatthew Ahrens dsl_dataset_name(ds, recvname); 24029adfa60dSMatthew Ahrens if (strlcat(recvname, "/", sizeof (recvname)) < 24039adfa60dSMatthew Ahrens sizeof (recvname) && 24049adfa60dSMatthew Ahrens strlcat(recvname, recv_clone_name, sizeof (recvname)) < 24059adfa60dSMatthew Ahrens sizeof (recvname) && 24069adfa60dSMatthew Ahrens dsl_dataset_hold(dp, recvname, FTAG, &recv_ds) == 0) { 24079c3fd121SMatthew Ahrens get_receive_resume_stats(recv_ds, nv); 24089c3fd121SMatthew Ahrens dsl_dataset_rele(recv_ds, FTAG); 24099c3fd121SMatthew Ahrens } 24109c3fd121SMatthew Ahrens } 2411fa9e4066Sahrens } 2412fa9e4066Sahrens 2413a2eea2e1Sahrens void 2414a2eea2e1Sahrens dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) 2415a2eea2e1Sahrens { 24163b2aab18SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool; 24173b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 24183b2aab18SMatthew Ahrens 2419dfc11533SChris Williamson stat->dds_creation_txg = dsl_get_creationtxg(ds); 2420dfc11533SChris Williamson stat->dds_inconsistent = dsl_get_inconsistent(ds); 2421dfc11533SChris Williamson stat->dds_guid = dsl_get_guid(ds); 24224445fffbSMatthew Ahrens stat->dds_origin[0] = '\0'; 2423bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 2424a2eea2e1Sahrens stat->dds_is_snapshot = B_TRUE; 2425dfc11533SChris Williamson stat->dds_num_clones = dsl_get_numclones(ds); 2426ebedde84SEric Taylor } else { 2427ebedde84SEric Taylor stat->dds_is_snapshot = B_FALSE; 2428ebedde84SEric Taylor stat->dds_num_clones = 0; 2429a2eea2e1Sahrens 24304445fffbSMatthew Ahrens if (dsl_dir_is_clone(ds->ds_dir)) { 2431dfc11533SChris Williamson dsl_dir_get_origin(ds->ds_dir, stat->dds_origin); 24324445fffbSMatthew Ahrens } 2433a2eea2e1Sahrens } 2434a2eea2e1Sahrens } 2435a2eea2e1Sahrens 2436a2eea2e1Sahrens uint64_t 2437a2eea2e1Sahrens dsl_dataset_fsid_guid(dsl_dataset_t *ds) 2438a2eea2e1Sahrens { 243991ebeef5Sahrens return (ds->ds_fsid_guid); 2440a2eea2e1Sahrens } 2441a2eea2e1Sahrens 2442a2eea2e1Sahrens void 2443a2eea2e1Sahrens dsl_dataset_space(dsl_dataset_t *ds, 2444a2eea2e1Sahrens uint64_t *refdbytesp, uint64_t *availbytesp, 2445a2eea2e1Sahrens uint64_t *usedobjsp, uint64_t *availobjsp) 2446fa9e4066Sahrens { 2447c1379625SJustin T. Gibbs *refdbytesp = dsl_dataset_phys(ds)->ds_referenced_bytes; 2448a2eea2e1Sahrens *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); 2449c1379625SJustin T. Gibbs if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) 2450c1379625SJustin T. Gibbs *availbytesp += 2451c1379625SJustin T. Gibbs ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes; 2452a9799022Sck if (ds->ds_quota != 0) { 2453a9799022Sck /* 2454a9799022Sck * Adjust available bytes according to refquota 2455a9799022Sck */ 2456a9799022Sck if (*refdbytesp < ds->ds_quota) 2457a9799022Sck *availbytesp = MIN(*availbytesp, 2458a9799022Sck ds->ds_quota - *refdbytesp); 2459a9799022Sck else 2460a9799022Sck *availbytesp = 0; 2461a9799022Sck } 2462c166b69dSPaul Dagnelie rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 2463c1379625SJustin T. Gibbs *usedobjsp = BP_GET_FILL(&dsl_dataset_phys(ds)->ds_bp); 2464c166b69dSPaul Dagnelie rrw_exit(&ds->ds_bp_rwlock, FTAG); 2465a2eea2e1Sahrens *availobjsp = DN_MAX_OBJECT - *usedobjsp; 2466fa9e4066Sahrens } 2467fa9e4066Sahrens 2468f18faf3fSek boolean_t 246934f2f8cfSMatthew Ahrens dsl_dataset_modified_since_snap(dsl_dataset_t *ds, dsl_dataset_t *snap) 2470f18faf3fSek { 2471f18faf3fSek dsl_pool_t *dp = ds->ds_dir->dd_pool; 2472c166b69dSPaul Dagnelie uint64_t birth; 2473f18faf3fSek 24743b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 247534f2f8cfSMatthew Ahrens if (snap == NULL) 2476f18faf3fSek return (B_FALSE); 2477c166b69dSPaul Dagnelie rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 2478c166b69dSPaul Dagnelie birth = dsl_dataset_get_blkptr(ds)->blk_birth; 2479c166b69dSPaul Dagnelie rrw_exit(&ds->ds_bp_rwlock, FTAG); 2480c166b69dSPaul Dagnelie if (birth > dsl_dataset_phys(snap)->ds_creation_txg) { 248134f2f8cfSMatthew Ahrens objset_t *os, *os_snap; 24826e0cbcaaSMatthew Ahrens /* 24836e0cbcaaSMatthew Ahrens * It may be that only the ZIL differs, because it was 24846e0cbcaaSMatthew Ahrens * reset in the head. Don't count that as being 24856e0cbcaaSMatthew Ahrens * modified. 24866e0cbcaaSMatthew Ahrens */ 24876e0cbcaaSMatthew Ahrens if (dmu_objset_from_ds(ds, &os) != 0) 24886e0cbcaaSMatthew Ahrens return (B_TRUE); 248934f2f8cfSMatthew Ahrens if (dmu_objset_from_ds(snap, &os_snap) != 0) 24906e0cbcaaSMatthew Ahrens return (B_TRUE); 24916e0cbcaaSMatthew Ahrens return (bcmp(&os->os_phys->os_meta_dnode, 249234f2f8cfSMatthew Ahrens &os_snap->os_phys->os_meta_dnode, 24936e0cbcaaSMatthew Ahrens sizeof (os->os_phys->os_meta_dnode)) != 0); 24946e0cbcaaSMatthew Ahrens } 2495f18faf3fSek return (B_FALSE); 2496f18faf3fSek } 2497f18faf3fSek 24983b2aab18SMatthew Ahrens typedef struct dsl_dataset_rename_snapshot_arg { 24993b2aab18SMatthew Ahrens const char *ddrsa_fsname; 25003b2aab18SMatthew Ahrens const char *ddrsa_oldsnapname; 25013b2aab18SMatthew Ahrens const char *ddrsa_newsnapname; 25023b2aab18SMatthew Ahrens boolean_t ddrsa_recursive; 25033b2aab18SMatthew Ahrens dmu_tx_t *ddrsa_tx; 25043b2aab18SMatthew Ahrens } dsl_dataset_rename_snapshot_arg_t; 25053b2aab18SMatthew Ahrens 25061d452cf5Sahrens /* ARGSUSED */ 2507fa9e4066Sahrens static int 25083b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check_impl(dsl_pool_t *dp, 25093b2aab18SMatthew Ahrens dsl_dataset_t *hds, void *arg) 2510fa9e4066Sahrens { 25113b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 25123b2aab18SMatthew Ahrens int error; 2513fa9e4066Sahrens uint64_t val; 2514fa9e4066Sahrens 25153b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); 25163b2aab18SMatthew Ahrens if (error != 0) { 25173b2aab18SMatthew Ahrens /* ignore nonexistent snapshots */ 25183b2aab18SMatthew Ahrens return (error == ENOENT ? 0 : error); 25193b2aab18SMatthew Ahrens } 25201d452cf5Sahrens 25213b2aab18SMatthew Ahrens /* new name should not exist */ 25223b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_newsnapname, &val); 25233b2aab18SMatthew Ahrens if (error == 0) 2524be6fd75aSMatthew Ahrens error = SET_ERROR(EEXIST); 25253b2aab18SMatthew Ahrens else if (error == ENOENT) 25263b2aab18SMatthew Ahrens error = 0; 2527cdf5b4caSmmusante 2528cdf5b4caSmmusante /* dataset name + 1 for the "@" + the new snapshot name must fit */ 25293b2aab18SMatthew Ahrens if (dsl_dir_namelen(hds->ds_dir) + 1 + 25309adfa60dSMatthew Ahrens strlen(ddrsa->ddrsa_newsnapname) >= ZFS_MAX_DATASET_NAME_LEN) 2531be6fd75aSMatthew Ahrens error = SET_ERROR(ENAMETOOLONG); 2532cdf5b4caSmmusante 25333b2aab18SMatthew Ahrens return (error); 25341d452cf5Sahrens } 2535fa9e4066Sahrens 25363b2aab18SMatthew Ahrens static int 25373b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx) 25381d452cf5Sahrens { 25393b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 25403b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 25411d452cf5Sahrens dsl_dataset_t *hds; 25423b2aab18SMatthew Ahrens int error; 2543fa9e4066Sahrens 25443b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds); 25453b2aab18SMatthew Ahrens if (error != 0) 25463b2aab18SMatthew Ahrens return (error); 2547fa9e4066Sahrens 25483b2aab18SMatthew Ahrens if (ddrsa->ddrsa_recursive) { 25493b2aab18SMatthew Ahrens error = dmu_objset_find_dp(dp, hds->ds_dir->dd_object, 25503b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_check_impl, ddrsa, 25513b2aab18SMatthew Ahrens DS_FIND_CHILDREN); 25523b2aab18SMatthew Ahrens } else { 25533b2aab18SMatthew Ahrens error = dsl_dataset_rename_snapshot_check_impl(dp, hds, ddrsa); 25543b2aab18SMatthew Ahrens } 2555745cd3c5Smaybee dsl_dataset_rele(hds, FTAG); 25563b2aab18SMatthew Ahrens return (error); 2557fa9e4066Sahrens } 2558fa9e4066Sahrens 2559cdf5b4caSmmusante static int 25603b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync_impl(dsl_pool_t *dp, 25613b2aab18SMatthew Ahrens dsl_dataset_t *hds, void *arg) 2562cdf5b4caSmmusante { 25633b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 25643b2aab18SMatthew Ahrens dsl_dataset_t *ds; 25653b2aab18SMatthew Ahrens uint64_t val; 25663b2aab18SMatthew Ahrens dmu_tx_t *tx = ddrsa->ddrsa_tx; 25673b2aab18SMatthew Ahrens int error; 2568ecd6cf80Smarks 25693b2aab18SMatthew Ahrens error = dsl_dataset_snap_lookup(hds, ddrsa->ddrsa_oldsnapname, &val); 25703b2aab18SMatthew Ahrens ASSERT(error == 0 || error == ENOENT); 25713b2aab18SMatthew Ahrens if (error == ENOENT) { 25723b2aab18SMatthew Ahrens /* ignore nonexistent snapshots */ 25733b2aab18SMatthew Ahrens return (0); 2574ecd6cf80Smarks } 2575ecd6cf80Smarks 25763b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, val, FTAG, &ds)); 25773b2aab18SMatthew Ahrens 25783b2aab18SMatthew Ahrens /* log before we change the name */ 25793b2aab18SMatthew Ahrens spa_history_log_internal_ds(ds, "rename", tx, 25803b2aab18SMatthew Ahrens "-> @%s", ddrsa->ddrsa_newsnapname); 2581cdf5b4caSmmusante 2582a2afb611SJerry Jelinek VERIFY0(dsl_dataset_snap_remove(hds, ddrsa->ddrsa_oldsnapname, tx, 2583a2afb611SJerry Jelinek B_FALSE)); 25843b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 25853b2aab18SMatthew Ahrens (void) strcpy(ds->ds_snapname, ddrsa->ddrsa_newsnapname); 25863b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 2587c1379625SJustin T. Gibbs VERIFY0(zap_add(dp->dp_meta_objset, 2588c1379625SJustin T. Gibbs dsl_dataset_phys(hds)->ds_snapnames_zapobj, 25893b2aab18SMatthew Ahrens ds->ds_snapname, 8, 1, &ds->ds_object, tx)); 2590cdf5b4caSmmusante 25913b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2592cdf5b4caSmmusante return (0); 2593cdf5b4caSmmusante } 2594cdf5b4caSmmusante 25953b2aab18SMatthew Ahrens static void 25963b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx) 2597cdf5b4caSmmusante { 25983b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t *ddrsa = arg; 25993b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 26003b2aab18SMatthew Ahrens dsl_dataset_t *hds; 2601cdf5b4caSmmusante 26023b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds)); 26033b2aab18SMatthew Ahrens ddrsa->ddrsa_tx = tx; 26043b2aab18SMatthew Ahrens if (ddrsa->ddrsa_recursive) { 26053b2aab18SMatthew Ahrens VERIFY0(dmu_objset_find_dp(dp, hds->ds_dir->dd_object, 26063b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_sync_impl, ddrsa, 26073b2aab18SMatthew Ahrens DS_FIND_CHILDREN)); 26083b2aab18SMatthew Ahrens } else { 26093b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_rename_snapshot_sync_impl(dp, hds, ddrsa)); 2610cdf5b4caSmmusante } 26113b2aab18SMatthew Ahrens dsl_dataset_rele(hds, FTAG); 2612cdf5b4caSmmusante } 2613cdf5b4caSmmusante 26143b2aab18SMatthew Ahrens int 26153b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot(const char *fsname, 26163b2aab18SMatthew Ahrens const char *oldsnapname, const char *newsnapname, boolean_t recursive) 26173a5a36beSmmusante { 26183b2aab18SMatthew Ahrens dsl_dataset_rename_snapshot_arg_t ddrsa; 26193a5a36beSmmusante 26203b2aab18SMatthew Ahrens ddrsa.ddrsa_fsname = fsname; 26213b2aab18SMatthew Ahrens ddrsa.ddrsa_oldsnapname = oldsnapname; 26223b2aab18SMatthew Ahrens ddrsa.ddrsa_newsnapname = newsnapname; 26233b2aab18SMatthew Ahrens ddrsa.ddrsa_recursive = recursive; 26243a5a36beSmmusante 26253b2aab18SMatthew Ahrens return (dsl_sync_task(fsname, dsl_dataset_rename_snapshot_check, 26267d46dc6cSMatthew Ahrens dsl_dataset_rename_snapshot_sync, &ddrsa, 26277d46dc6cSMatthew Ahrens 1, ZFS_SPACE_CHECK_RESERVED)); 26283a5a36beSmmusante } 26293a5a36beSmmusante 263091948b51SKeith M Wesolowski /* 263191948b51SKeith M Wesolowski * If we're doing an ownership handoff, we need to make sure that there is 263291948b51SKeith M Wesolowski * only one long hold on the dataset. We're not allowed to change anything here 263391948b51SKeith M Wesolowski * so we don't permanently release the long hold or regular hold here. We want 263491948b51SKeith M Wesolowski * to do this only when syncing to avoid the dataset unexpectedly going away 263591948b51SKeith M Wesolowski * when we release the long hold. 263691948b51SKeith M Wesolowski */ 263791948b51SKeith M Wesolowski static int 263891948b51SKeith M Wesolowski dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx) 263991948b51SKeith M Wesolowski { 264091948b51SKeith M Wesolowski boolean_t held; 264191948b51SKeith M Wesolowski 264291948b51SKeith M Wesolowski if (!dmu_tx_is_syncing(tx)) 264391948b51SKeith M Wesolowski return (0); 264491948b51SKeith M Wesolowski 264591948b51SKeith M Wesolowski if (owner != NULL) { 264691948b51SKeith M Wesolowski VERIFY3P(ds->ds_owner, ==, owner); 264791948b51SKeith M Wesolowski dsl_dataset_long_rele(ds, owner); 264891948b51SKeith M Wesolowski } 264991948b51SKeith M Wesolowski 265091948b51SKeith M Wesolowski held = dsl_dataset_long_held(ds); 265191948b51SKeith M Wesolowski 265291948b51SKeith M Wesolowski if (owner != NULL) 265391948b51SKeith M Wesolowski dsl_dataset_long_hold(ds, owner); 265491948b51SKeith M Wesolowski 265591948b51SKeith M Wesolowski if (held) 265691948b51SKeith M Wesolowski return (SET_ERROR(EBUSY)); 265791948b51SKeith M Wesolowski 265891948b51SKeith M Wesolowski return (0); 265991948b51SKeith M Wesolowski } 266091948b51SKeith M Wesolowski 2661000cce6bSBrad Lewis int 26623b2aab18SMatthew Ahrens dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx) 2663fa9e4066Sahrens { 266491948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t *ddra = arg; 26653b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 26661d452cf5Sahrens dsl_dataset_t *ds; 26673b2aab18SMatthew Ahrens int64_t unused_refres_delta; 26683b2aab18SMatthew Ahrens int error; 2669fa9e4066Sahrens 267091948b51SKeith M Wesolowski error = dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds); 26713b2aab18SMatthew Ahrens if (error != 0) 26723b2aab18SMatthew Ahrens return (error); 2673370c1af0SSanjeev Bagewadi 26743b2aab18SMatthew Ahrens /* must not be a snapshot */ 2675bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 26763b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2677be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 26783b2aab18SMatthew Ahrens } 26793a5a36beSmmusante 26803b2aab18SMatthew Ahrens /* must have a most recent snapshot */ 2681c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_txg < TXG_INITIAL) { 26823b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 268395643f75SAndriy Gapon return (SET_ERROR(ESRCH)); 26843b2aab18SMatthew Ahrens } 26853a5a36beSmmusante 2686bfaed0b9SAndriy Gapon /* 2687bfaed0b9SAndriy Gapon * No rollback to a snapshot created in the current txg, because 2688bfaed0b9SAndriy Gapon * the rollback may dirty the dataset and create blocks that are 2689bfaed0b9SAndriy Gapon * not reachable from the rootbp while having a birth txg that 2690bfaed0b9SAndriy Gapon * falls into the snapshot's range. 2691bfaed0b9SAndriy Gapon */ 2692bfaed0b9SAndriy Gapon if (dmu_tx_is_syncing(tx) && 2693bfaed0b9SAndriy Gapon dsl_dataset_phys(ds)->ds_prev_snap_txg >= tx->tx_txg) { 2694bfaed0b9SAndriy Gapon dsl_dataset_rele(ds, FTAG); 2695bfaed0b9SAndriy Gapon return (SET_ERROR(EAGAIN)); 2696bfaed0b9SAndriy Gapon } 2697bfaed0b9SAndriy Gapon 269877b17137SAndriy Gapon /* 269977b17137SAndriy Gapon * If the expected target snapshot is specified, then check that 270077b17137SAndriy Gapon * the latest snapshot is it. 270177b17137SAndriy Gapon */ 270277b17137SAndriy Gapon if (ddra->ddra_tosnap != NULL) { 270395643f75SAndriy Gapon dsl_dataset_t *snapds; 270495643f75SAndriy Gapon 270595643f75SAndriy Gapon /* Check if the target snapshot exists at all. */ 270695643f75SAndriy Gapon error = dsl_dataset_hold(dp, ddra->ddra_tosnap, FTAG, &snapds); 270795643f75SAndriy Gapon if (error != 0) { 270895643f75SAndriy Gapon /* 270995643f75SAndriy Gapon * ESRCH is used to signal that the target snapshot does 271095643f75SAndriy Gapon * not exist, while ENOENT is used to report that 271195643f75SAndriy Gapon * the rolled back dataset does not exist. 271295643f75SAndriy Gapon * ESRCH is also used to cover other cases where the 271395643f75SAndriy Gapon * target snapshot is not related to the dataset being 271495643f75SAndriy Gapon * rolled back such as being in a different pool. 271595643f75SAndriy Gapon */ 271695643f75SAndriy Gapon if (error == ENOENT || error == EXDEV) 271795643f75SAndriy Gapon error = SET_ERROR(ESRCH); 271895643f75SAndriy Gapon dsl_dataset_rele(ds, FTAG); 271995643f75SAndriy Gapon return (error); 272095643f75SAndriy Gapon } 272195643f75SAndriy Gapon ASSERT(snapds->ds_is_snapshot); 272277b17137SAndriy Gapon 272395643f75SAndriy Gapon /* Check if the snapshot is the latest snapshot indeed. */ 272495643f75SAndriy Gapon if (snapds != ds->ds_prev) { 272595643f75SAndriy Gapon /* 272695643f75SAndriy Gapon * Distinguish between the case where the only problem 272795643f75SAndriy Gapon * is intervening snapshots (EEXIST) vs the snapshot 272895643f75SAndriy Gapon * not being a valid target for rollback (ESRCH). 272995643f75SAndriy Gapon */ 273095643f75SAndriy Gapon if (snapds->ds_dir == ds->ds_dir || 273195643f75SAndriy Gapon (dsl_dir_is_clone(ds->ds_dir) && 273295643f75SAndriy Gapon dsl_dir_phys(ds->ds_dir)->dd_origin_obj == 273395643f75SAndriy Gapon snapds->ds_object)) { 273495643f75SAndriy Gapon error = SET_ERROR(EEXIST); 273595643f75SAndriy Gapon } else { 273695643f75SAndriy Gapon error = SET_ERROR(ESRCH); 273795643f75SAndriy Gapon } 273895643f75SAndriy Gapon dsl_dataset_rele(snapds, FTAG); 273995643f75SAndriy Gapon dsl_dataset_rele(ds, FTAG); 274095643f75SAndriy Gapon return (error); 274195643f75SAndriy Gapon } 274295643f75SAndriy Gapon dsl_dataset_rele(snapds, FTAG); 274377b17137SAndriy Gapon } 274477b17137SAndriy Gapon 274578f17100SMatthew Ahrens /* must not have any bookmarks after the most recent snapshot */ 274678f17100SMatthew Ahrens nvlist_t *proprequest = fnvlist_alloc(); 274778f17100SMatthew Ahrens fnvlist_add_boolean(proprequest, zfs_prop_to_name(ZFS_PROP_CREATETXG)); 274878f17100SMatthew Ahrens nvlist_t *bookmarks = fnvlist_alloc(); 274978f17100SMatthew Ahrens error = dsl_get_bookmarks_impl(ds, proprequest, bookmarks); 275078f17100SMatthew Ahrens fnvlist_free(proprequest); 275195643f75SAndriy Gapon if (error != 0) { 275295643f75SAndriy Gapon dsl_dataset_rele(ds, FTAG); 275378f17100SMatthew Ahrens return (error); 275495643f75SAndriy Gapon } 275578f17100SMatthew Ahrens for (nvpair_t *pair = nvlist_next_nvpair(bookmarks, NULL); 275678f17100SMatthew Ahrens pair != NULL; pair = nvlist_next_nvpair(bookmarks, pair)) { 275778f17100SMatthew Ahrens nvlist_t *valuenv = 275878f17100SMatthew Ahrens fnvlist_lookup_nvlist(fnvpair_value_nvlist(pair), 275978f17100SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_CREATETXG)); 276078f17100SMatthew Ahrens uint64_t createtxg = fnvlist_lookup_uint64(valuenv, "value"); 2761c1379625SJustin T. Gibbs if (createtxg > dsl_dataset_phys(ds)->ds_prev_snap_txg) { 276278f17100SMatthew Ahrens fnvlist_free(bookmarks); 276378f17100SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 276478f17100SMatthew Ahrens return (SET_ERROR(EEXIST)); 276578f17100SMatthew Ahrens } 276678f17100SMatthew Ahrens } 276778f17100SMatthew Ahrens fnvlist_free(bookmarks); 276878f17100SMatthew Ahrens 276991948b51SKeith M Wesolowski error = dsl_dataset_handoff_check(ds, ddra->ddra_owner, tx); 277091948b51SKeith M Wesolowski if (error != 0) { 27713b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 277291948b51SKeith M Wesolowski return (error); 27733b2aab18SMatthew Ahrens } 27743b2aab18SMatthew Ahrens 27753b2aab18SMatthew Ahrens /* 27763b2aab18SMatthew Ahrens * Check if the snap we are rolling back to uses more than 27773b2aab18SMatthew Ahrens * the refquota. 27783b2aab18SMatthew Ahrens */ 27793b2aab18SMatthew Ahrens if (ds->ds_quota != 0 && 2780c1379625SJustin T. Gibbs dsl_dataset_phys(ds->ds_prev)->ds_referenced_bytes > ds->ds_quota) { 27813b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2782be6fd75aSMatthew Ahrens return (SET_ERROR(EDQUOT)); 2783fa9e4066Sahrens } 2784370c1af0SSanjeev Bagewadi 27853b2aab18SMatthew Ahrens /* 27863b2aab18SMatthew Ahrens * When we do the clone swap, we will temporarily use more space 27873b2aab18SMatthew Ahrens * due to the refreservation (the head will no longer have any 27883b2aab18SMatthew Ahrens * unique space, so the entire amount of the refreservation will need 27893b2aab18SMatthew Ahrens * to be free). We will immediately destroy the clone, freeing 27903b2aab18SMatthew Ahrens * this space, but the freeing happens over many txg's. 27913b2aab18SMatthew Ahrens */ 27923b2aab18SMatthew Ahrens unused_refres_delta = (int64_t)MIN(ds->ds_reserved, 2793c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_unique_bytes); 27943b2aab18SMatthew Ahrens 27953b2aab18SMatthew Ahrens if (unused_refres_delta > 0 && 27963b2aab18SMatthew Ahrens unused_refres_delta > 27973b2aab18SMatthew Ahrens dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) { 27983b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 2799be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 2800fa9e4066Sahrens } 2801fa9e4066Sahrens 28023b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 28033b2aab18SMatthew Ahrens return (0); 28043b2aab18SMatthew Ahrens } 28051d452cf5Sahrens 2806000cce6bSBrad Lewis void 28073b2aab18SMatthew Ahrens dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx) 28083b2aab18SMatthew Ahrens { 280991948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t *ddra = arg; 28103b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 28113b2aab18SMatthew Ahrens dsl_dataset_t *ds, *clone; 28123b2aab18SMatthew Ahrens uint64_t cloneobj; 28139adfa60dSMatthew Ahrens char namebuf[ZFS_MAX_DATASET_NAME_LEN]; 28141d452cf5Sahrens 281591948b51SKeith M Wesolowski VERIFY0(dsl_dataset_hold(dp, ddra->ddra_fsname, FTAG, &ds)); 28161d452cf5Sahrens 2817a7027df1SMatthew Ahrens dsl_dataset_name(ds->ds_prev, namebuf); 2818a7027df1SMatthew Ahrens fnvlist_add_string(ddra->ddra_result, "target", namebuf); 2819a7027df1SMatthew Ahrens 28203b2aab18SMatthew Ahrens cloneobj = dsl_dataset_create_sync(ds->ds_dir, "%rollback", 2821*eb633035STom Caputi ds->ds_prev, DS_CREATE_FLAG_NODIRTY, kcred, NULL, tx); 28221d452cf5Sahrens 28233b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, cloneobj, FTAG, &clone)); 28241d452cf5Sahrens 28253b2aab18SMatthew Ahrens dsl_dataset_clone_swap_sync_impl(clone, ds, tx); 28263b2aab18SMatthew Ahrens dsl_dataset_zero_zil(ds, tx); 28273b2aab18SMatthew Ahrens 28283b2aab18SMatthew Ahrens dsl_destroy_head_sync_impl(clone, tx); 28293b2aab18SMatthew Ahrens 28303b2aab18SMatthew Ahrens dsl_dataset_rele(clone, FTAG); 28313b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 28323b2aab18SMatthew Ahrens } 28333b2aab18SMatthew Ahrens 283491948b51SKeith M Wesolowski /* 2835a7027df1SMatthew Ahrens * Rolls back the given filesystem or volume to the most recent snapshot. 2836a7027df1SMatthew Ahrens * The name of the most recent snapshot will be returned under key "target" 2837a7027df1SMatthew Ahrens * in the result nvlist. 283891948b51SKeith M Wesolowski * 2839a7027df1SMatthew Ahrens * If owner != NULL: 284091948b51SKeith M Wesolowski * - The existing dataset MUST be owned by the specified owner at entry 284191948b51SKeith M Wesolowski * - Upon return, dataset will still be held by the same owner, whether we 284291948b51SKeith M Wesolowski * succeed or not. 284391948b51SKeith M Wesolowski * 284491948b51SKeith M Wesolowski * This mode is required any time the existing filesystem is mounted. See 284591948b51SKeith M Wesolowski * notes above zfs_suspend_fs() for further details. 284691948b51SKeith M Wesolowski */ 28473b2aab18SMatthew Ahrens int 284877b17137SAndriy Gapon dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner, 284977b17137SAndriy Gapon nvlist_t *result) 28503b2aab18SMatthew Ahrens { 285191948b51SKeith M Wesolowski dsl_dataset_rollback_arg_t ddra; 285291948b51SKeith M Wesolowski 285391948b51SKeith M Wesolowski ddra.ddra_fsname = fsname; 285477b17137SAndriy Gapon ddra.ddra_tosnap = tosnap; 285591948b51SKeith M Wesolowski ddra.ddra_owner = owner; 2856a7027df1SMatthew Ahrens ddra.ddra_result = result; 285791948b51SKeith M Wesolowski 28583b2aab18SMatthew Ahrens return (dsl_sync_task(fsname, dsl_dataset_rollback_check, 28597d46dc6cSMatthew Ahrens dsl_dataset_rollback_sync, &ddra, 28607d46dc6cSMatthew Ahrens 1, ZFS_SPACE_CHECK_RESERVED)); 2861fa9e4066Sahrens } 286299653d4eSeschrock 2863088f3894Sahrens struct promotenode { 2864745cd3c5Smaybee list_node_t link; 2865745cd3c5Smaybee dsl_dataset_t *ds; 2866745cd3c5Smaybee }; 2867745cd3c5Smaybee 286874e7dc98SMatthew Ahrens static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep); 28693b2aab18SMatthew Ahrens static int promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, 28703b2aab18SMatthew Ahrens void *tag); 28713b2aab18SMatthew Ahrens static void promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag); 287274e7dc98SMatthew Ahrens 2873dfc11533SChris Williamson int 28743b2aab18SMatthew Ahrens dsl_dataset_promote_check(void *arg, dmu_tx_t *tx) 287599653d4eSeschrock { 28763b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t *ddpa = arg; 28773b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 28783b2aab18SMatthew Ahrens dsl_dataset_t *hds; 28793b2aab18SMatthew Ahrens struct promotenode *snap; 28803b2aab18SMatthew Ahrens dsl_dataset_t *origin_ds; 2881745cd3c5Smaybee int err; 2882cde58dbcSMatthew Ahrens uint64_t unused; 2883a2afb611SJerry Jelinek uint64_t ss_mv_cnt; 2884cb5842f8SAndriy Gapon size_t max_snap_len; 2885dfc11533SChris Williamson boolean_t conflicting_snaps; 28861d452cf5Sahrens 28873b2aab18SMatthew Ahrens err = promote_hold(ddpa, dp, FTAG); 28883b2aab18SMatthew Ahrens if (err != 0) 28893b2aab18SMatthew Ahrens return (err); 289099653d4eSeschrock 28913b2aab18SMatthew Ahrens hds = ddpa->ddpa_clone; 2892dfc11533SChris Williamson snap = list_head(&ddpa->shared_snaps); 2893dfc11533SChris Williamson origin_ds = snap->ds; 2894cb5842f8SAndriy Gapon max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; 28951d452cf5Sahrens 2896dfc11533SChris Williamson snap = list_head(&ddpa->origin_snaps); 2897dfc11533SChris Williamson 2898c1379625SJustin T. Gibbs if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { 28993b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 2900be6fd75aSMatthew Ahrens return (SET_ERROR(EXDEV)); 29013b2aab18SMatthew Ahrens } 29023b2aab18SMatthew Ahrens 2903*eb633035STom Caputi snap = list_head(&ddpa->shared_snaps); 2904*eb633035STom Caputi if (snap == NULL) { 2905*eb633035STom Caputi err = SET_ERROR(ENOENT); 2906*eb633035STom Caputi goto out; 2907*eb633035STom Caputi } 2908*eb633035STom Caputi origin_ds = snap->ds; 2909*eb633035STom Caputi 2910*eb633035STom Caputi /* 2911*eb633035STom Caputi * Encrypted clones share a DSL Crypto Key with their origin's dsl dir. 2912*eb633035STom Caputi * When doing a promote we must make sure the encryption root for 2913*eb633035STom Caputi * both the target and the target's origin does not change to avoid 2914*eb633035STom Caputi * needing to rewrap encryption keys 2915*eb633035STom Caputi */ 2916*eb633035STom Caputi err = dsl_dataset_promote_crypt_check(hds->ds_dir, origin_ds->ds_dir); 2917*eb633035STom Caputi if (err != 0) 2918*eb633035STom Caputi goto out; 2919*eb633035STom Caputi 29203b2aab18SMatthew Ahrens /* 29213b2aab18SMatthew Ahrens * Compute and check the amount of space to transfer. Since this is 29223b2aab18SMatthew Ahrens * so expensive, don't do the preliminary check. 29233b2aab18SMatthew Ahrens */ 29243b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) { 29253b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 29263b2aab18SMatthew Ahrens return (0); 29273b2aab18SMatthew Ahrens } 29283b2aab18SMatthew Ahrens 29293cb34c60Sahrens /* compute origin's new unique space */ 29303b2aab18SMatthew Ahrens snap = list_tail(&ddpa->clone_snaps); 2931c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, 2932c1379625SJustin T. Gibbs origin_ds->ds_object); 2933cde58dbcSMatthew Ahrens dsl_deadlist_space_range(&snap->ds->ds_deadlist, 2934c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_prev_snap_txg, UINT64_MAX, 29353b2aab18SMatthew Ahrens &ddpa->unique, &unused, &unused); 293699653d4eSeschrock 2937745cd3c5Smaybee /* 2938745cd3c5Smaybee * Walk the snapshots that we are moving 2939745cd3c5Smaybee * 294074e7dc98SMatthew Ahrens * Compute space to transfer. Consider the incremental changes 29413b2aab18SMatthew Ahrens * to used by each snapshot: 294274e7dc98SMatthew Ahrens * (my used) = (prev's used) + (blocks born) - (blocks killed) 294374e7dc98SMatthew Ahrens * So each snapshot gave birth to: 294474e7dc98SMatthew Ahrens * (blocks born) = (my used) - (prev's used) + (blocks killed) 2945745cd3c5Smaybee * So a sequence would look like: 294674e7dc98SMatthew Ahrens * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0) 2947745cd3c5Smaybee * Which simplifies to: 294874e7dc98SMatthew Ahrens * uN + kN + kN-1 + ... + k1 + k0 2949745cd3c5Smaybee * Note however, if we stop before we reach the ORIGIN we get: 295074e7dc98SMatthew Ahrens * uN + kN + kN-1 + ... + kM - uM-1 2951745cd3c5Smaybee */ 2952dfc11533SChris Williamson conflicting_snaps = B_FALSE; 2953a2afb611SJerry Jelinek ss_mv_cnt = 0; 2954c1379625SJustin T. Gibbs ddpa->used = dsl_dataset_phys(origin_ds)->ds_referenced_bytes; 2955c1379625SJustin T. Gibbs ddpa->comp = dsl_dataset_phys(origin_ds)->ds_compressed_bytes; 2956c1379625SJustin T. Gibbs ddpa->uncomp = dsl_dataset_phys(origin_ds)->ds_uncompressed_bytes; 29573b2aab18SMatthew Ahrens for (snap = list_head(&ddpa->shared_snaps); snap; 29583b2aab18SMatthew Ahrens snap = list_next(&ddpa->shared_snaps, snap)) { 295999653d4eSeschrock uint64_t val, dlused, dlcomp, dluncomp; 2960745cd3c5Smaybee dsl_dataset_t *ds = snap->ds; 296199653d4eSeschrock 2962a2afb611SJerry Jelinek ss_mv_cnt++; 2963a2afb611SJerry Jelinek 29643b2aab18SMatthew Ahrens /* 29653b2aab18SMatthew Ahrens * If there are long holds, we won't be able to evict 29663b2aab18SMatthew Ahrens * the objset. 29673b2aab18SMatthew Ahrens */ 29683b2aab18SMatthew Ahrens if (dsl_dataset_long_held(ds)) { 2969be6fd75aSMatthew Ahrens err = SET_ERROR(EBUSY); 29703b2aab18SMatthew Ahrens goto out; 29713b2aab18SMatthew Ahrens } 29723b2aab18SMatthew Ahrens 297399653d4eSeschrock /* Check that the snapshot name does not conflict */ 29743b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 2975cb5842f8SAndriy Gapon if (strlen(ds->ds_snapname) >= max_snap_len) { 2976cb5842f8SAndriy Gapon err = SET_ERROR(ENAMETOOLONG); 2977cb5842f8SAndriy Gapon goto out; 2978cb5842f8SAndriy Gapon } 2979745cd3c5Smaybee err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); 2980681d9761SEric Taylor if (err == 0) { 2981dfc11533SChris Williamson fnvlist_add_boolean(ddpa->err_ds, 2982dfc11533SChris Williamson snap->ds->ds_snapname); 2983dfc11533SChris Williamson conflicting_snaps = B_TRUE; 2984dfc11533SChris Williamson } else if (err != ENOENT) { 2985681d9761SEric Taylor goto out; 2986681d9761SEric Taylor } 298799653d4eSeschrock 2988745cd3c5Smaybee /* The very first snapshot does not have a deadlist */ 2989c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_prev_snap_obj == 0) 299074e7dc98SMatthew Ahrens continue; 299174e7dc98SMatthew Ahrens 2992cde58dbcSMatthew Ahrens dsl_deadlist_space(&ds->ds_deadlist, 2993cde58dbcSMatthew Ahrens &dlused, &dlcomp, &dluncomp); 29943b2aab18SMatthew Ahrens ddpa->used += dlused; 29953b2aab18SMatthew Ahrens ddpa->comp += dlcomp; 29963b2aab18SMatthew Ahrens ddpa->uncomp += dluncomp; 299774e7dc98SMatthew Ahrens } 2998745cd3c5Smaybee 2999dfc11533SChris Williamson /* 3000dfc11533SChris Williamson * In order to return the full list of conflicting snapshots, we check 3001dfc11533SChris Williamson * whether there was a conflict after traversing all of them. 3002dfc11533SChris Williamson */ 3003dfc11533SChris Williamson if (conflicting_snaps) { 3004dfc11533SChris Williamson err = SET_ERROR(EEXIST); 3005dfc11533SChris Williamson goto out; 3006dfc11533SChris Williamson } 3007dfc11533SChris Williamson 3008745cd3c5Smaybee /* 3009745cd3c5Smaybee * If we are a clone of a clone then we never reached ORIGIN, 3010745cd3c5Smaybee * so we need to subtract out the clone origin's used space. 3011745cd3c5Smaybee */ 30123b2aab18SMatthew Ahrens if (ddpa->origin_origin) { 3013c1379625SJustin T. Gibbs ddpa->used -= 3014c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)->ds_referenced_bytes; 3015c1379625SJustin T. Gibbs ddpa->comp -= 3016c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)->ds_compressed_bytes; 30173b2aab18SMatthew Ahrens ddpa->uncomp -= 3018c1379625SJustin T. Gibbs dsl_dataset_phys(ddpa->origin_origin)-> 3019c1379625SJustin T. Gibbs ds_uncompressed_bytes; 302099653d4eSeschrock } 302199653d4eSeschrock 3022a2afb611SJerry Jelinek /* Check that there is enough space and limit headroom here */ 302374e7dc98SMatthew Ahrens err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir, 3024a2afb611SJerry Jelinek 0, ss_mv_cnt, ddpa->used, ddpa->cr); 30253b2aab18SMatthew Ahrens if (err != 0) 30263b2aab18SMatthew Ahrens goto out; 302774e7dc98SMatthew Ahrens 302874e7dc98SMatthew Ahrens /* 302974e7dc98SMatthew Ahrens * Compute the amounts of space that will be used by snapshots 303074e7dc98SMatthew Ahrens * after the promotion (for both origin and clone). For each, 303174e7dc98SMatthew Ahrens * it is the amount of space that will be on all of their 303274e7dc98SMatthew Ahrens * deadlists (that was not born before their new origin). 303374e7dc98SMatthew Ahrens */ 3034c1379625SJustin T. Gibbs if (dsl_dir_phys(hds->ds_dir)->dd_flags & DD_FLAG_USED_BREAKDOWN) { 303574e7dc98SMatthew Ahrens uint64_t space; 303674e7dc98SMatthew Ahrens 303774e7dc98SMatthew Ahrens /* 303874e7dc98SMatthew Ahrens * Note, typically this will not be a clone of a clone, 30393f9d6ad7SLin Ling * so dd_origin_txg will be < TXG_INITIAL, so 3040cde58dbcSMatthew Ahrens * these snaplist_space() -> dsl_deadlist_space_range() 304174e7dc98SMatthew Ahrens * calls will be fast because they do not have to 304274e7dc98SMatthew Ahrens * iterate over all bps. 304374e7dc98SMatthew Ahrens */ 30443b2aab18SMatthew Ahrens snap = list_head(&ddpa->origin_snaps); 30453b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->shared_snaps, 30463b2aab18SMatthew Ahrens snap->ds->ds_dir->dd_origin_txg, &ddpa->cloneusedsnap); 30473b2aab18SMatthew Ahrens if (err != 0) 30483b2aab18SMatthew Ahrens goto out; 304974e7dc98SMatthew Ahrens 30503b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->clone_snaps, 30513f9d6ad7SLin Ling snap->ds->ds_dir->dd_origin_txg, &space); 30523b2aab18SMatthew Ahrens if (err != 0) 30533b2aab18SMatthew Ahrens goto out; 30543b2aab18SMatthew Ahrens ddpa->cloneusedsnap += space; 305574e7dc98SMatthew Ahrens } 3056c1379625SJustin T. Gibbs if (dsl_dir_phys(origin_ds->ds_dir)->dd_flags & 3057c1379625SJustin T. Gibbs DD_FLAG_USED_BREAKDOWN) { 30583b2aab18SMatthew Ahrens err = snaplist_space(&ddpa->origin_snaps, 3059c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_creation_txg, 3060c1379625SJustin T. Gibbs &ddpa->originusedsnap); 30613b2aab18SMatthew Ahrens if (err != 0) 30623b2aab18SMatthew Ahrens goto out; 3063745cd3c5Smaybee } 30641d452cf5Sahrens 3065681d9761SEric Taylor out: 30663b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 3067681d9761SEric Taylor return (err); 30681d452cf5Sahrens } 306999653d4eSeschrock 3070dfc11533SChris Williamson void 30713b2aab18SMatthew Ahrens dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx) 30721d452cf5Sahrens { 30733b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t *ddpa = arg; 30743b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 30753b2aab18SMatthew Ahrens dsl_dataset_t *hds; 30763b2aab18SMatthew Ahrens struct promotenode *snap; 30773b2aab18SMatthew Ahrens dsl_dataset_t *origin_ds; 30783b2aab18SMatthew Ahrens dsl_dataset_t *origin_head; 30793b2aab18SMatthew Ahrens dsl_dir_t *dd; 30803cb34c60Sahrens dsl_dir_t *odd = NULL; 3081088f3894Sahrens uint64_t oldnext_obj; 308274e7dc98SMatthew Ahrens int64_t delta; 30831d452cf5Sahrens 30843b2aab18SMatthew Ahrens VERIFY0(promote_hold(ddpa, dp, FTAG)); 30853b2aab18SMatthew Ahrens hds = ddpa->ddpa_clone; 30863b2aab18SMatthew Ahrens 3087c1379625SJustin T. Gibbs ASSERT0(dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE); 30881d452cf5Sahrens 30893b2aab18SMatthew Ahrens snap = list_head(&ddpa->shared_snaps); 30903b2aab18SMatthew Ahrens origin_ds = snap->ds; 30913b2aab18SMatthew Ahrens dd = hds->ds_dir; 30923b2aab18SMatthew Ahrens 30933b2aab18SMatthew Ahrens snap = list_head(&ddpa->origin_snaps); 309474e7dc98SMatthew Ahrens origin_head = snap->ds; 309574e7dc98SMatthew Ahrens 30960b69c2f0Sahrens /* 30973cb34c60Sahrens * We need to explicitly open odd, since origin_ds's dd will be 30980b69c2f0Sahrens * changing. 30990b69c2f0Sahrens */ 31003b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, origin_ds->ds_dir->dd_object, 31013cb34c60Sahrens NULL, FTAG, &odd)); 310299653d4eSeschrock 3103*eb633035STom Caputi dsl_dataset_promote_crypt_sync(hds->ds_dir, odd, tx); 3104*eb633035STom Caputi 3105745cd3c5Smaybee /* change origin's next snap */ 3106745cd3c5Smaybee dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); 3107c1379625SJustin T. Gibbs oldnext_obj = dsl_dataset_phys(origin_ds)->ds_next_snap_obj; 31083b2aab18SMatthew Ahrens snap = list_tail(&ddpa->clone_snaps); 3109c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(snap->ds)->ds_prev_snap_obj, ==, 3110c1379625SJustin T. Gibbs origin_ds->ds_object); 3111c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_next_snap_obj = snap->ds->ds_object; 3112745cd3c5Smaybee 3113088f3894Sahrens /* change the origin's next clone */ 3114c1379625SJustin T. Gibbs if (dsl_dataset_phys(origin_ds)->ds_next_clones_obj) { 31153b2aab18SMatthew Ahrens dsl_dataset_remove_from_next_clones(origin_ds, 31163b2aab18SMatthew Ahrens snap->ds->ds_object, tx); 31173b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 3118c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_next_clones_obj, 3119088f3894Sahrens oldnext_obj, tx)); 3120088f3894Sahrens } 3121088f3894Sahrens 3122745cd3c5Smaybee /* change origin */ 3123745cd3c5Smaybee dmu_buf_will_dirty(dd->dd_dbuf, tx); 3124c1379625SJustin T. Gibbs ASSERT3U(dsl_dir_phys(dd)->dd_origin_obj, ==, origin_ds->ds_object); 3125c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_origin_obj = dsl_dir_phys(odd)->dd_origin_obj; 31263f9d6ad7SLin Ling dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg; 3127745cd3c5Smaybee dmu_buf_will_dirty(odd->dd_dbuf, tx); 3128c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_origin_obj = origin_ds->ds_object; 31293f9d6ad7SLin Ling origin_head->ds_dir->dd_origin_txg = 3130c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_creation_txg; 3131745cd3c5Smaybee 3132cde58dbcSMatthew Ahrens /* change dd_clone entries */ 3133cde58dbcSMatthew Ahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 31343b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 3135c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_clones, hds->ds_object, tx)); 31363b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 3137c1379625SJustin T. Gibbs dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, 3138cde58dbcSMatthew Ahrens hds->ds_object, tx)); 3139cde58dbcSMatthew Ahrens 31403b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 3141c1379625SJustin T. Gibbs dsl_dir_phys(ddpa->origin_origin->ds_dir)->dd_clones, 3142cde58dbcSMatthew Ahrens origin_head->ds_object, tx)); 3143c1379625SJustin T. Gibbs if (dsl_dir_phys(dd)->dd_clones == 0) { 3144c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones = 3145c1379625SJustin T. Gibbs zap_create(dp->dp_meta_objset, DMU_OT_DSL_CLONES, 3146c1379625SJustin T. Gibbs DMU_OT_NONE, 0, tx); 3147cde58dbcSMatthew Ahrens } 31483b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 3149c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones, origin_head->ds_object, tx)); 3150cde58dbcSMatthew Ahrens } 3151cde58dbcSMatthew Ahrens 315299653d4eSeschrock /* move snapshots to this dir */ 31533b2aab18SMatthew Ahrens for (snap = list_head(&ddpa->shared_snaps); snap; 31543b2aab18SMatthew Ahrens snap = list_next(&ddpa->shared_snaps, snap)) { 3155745cd3c5Smaybee dsl_dataset_t *ds = snap->ds; 315699653d4eSeschrock 31573b2aab18SMatthew Ahrens /* 31583b2aab18SMatthew Ahrens * Property callbacks are registered to a particular 31593b2aab18SMatthew Ahrens * dsl_dir. Since ours is changing, evict the objset 31603b2aab18SMatthew Ahrens * so that they will be unregistered from the old dsl_dir. 31613b2aab18SMatthew Ahrens */ 3162503ad85cSMatthew Ahrens if (ds->ds_objset) { 3163503ad85cSMatthew Ahrens dmu_objset_evict(ds->ds_objset); 3164503ad85cSMatthew Ahrens ds->ds_objset = NULL; 31653baa08fcSek } 31663b2aab18SMatthew Ahrens 316799653d4eSeschrock /* move snap name entry */ 31683b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_get_snapname(ds)); 31693b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_snap_remove(origin_head, 3170a2afb611SJerry Jelinek ds->ds_snapname, tx, B_TRUE)); 31713b2aab18SMatthew Ahrens VERIFY0(zap_add(dp->dp_meta_objset, 3172c1379625SJustin T. Gibbs dsl_dataset_phys(hds)->ds_snapnames_zapobj, ds->ds_snapname, 317399653d4eSeschrock 8, 1, &ds->ds_object, tx)); 3174a2afb611SJerry Jelinek dsl_fs_ss_count_adjust(hds->ds_dir, 1, 3175a2afb611SJerry Jelinek DD_FIELD_SNAPSHOT_COUNT, tx); 3176cde58dbcSMatthew Ahrens 317799653d4eSeschrock /* change containing dsl_dir */ 317899653d4eSeschrock dmu_buf_will_dirty(ds->ds_dbuf, tx); 3179c1379625SJustin T. Gibbs ASSERT3U(dsl_dataset_phys(ds)->ds_dir_obj, ==, odd->dd_object); 3180c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_dir_obj = dd->dd_object; 31813cb34c60Sahrens ASSERT3P(ds->ds_dir, ==, odd); 31823b2aab18SMatthew Ahrens dsl_dir_rele(ds->ds_dir, ds); 31833b2aab18SMatthew Ahrens VERIFY0(dsl_dir_hold_obj(dp, dd->dd_object, 318499653d4eSeschrock NULL, ds, &ds->ds_dir)); 318599653d4eSeschrock 3186cde58dbcSMatthew Ahrens /* move any clone references */ 3187c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_next_clones_obj && 3188cde58dbcSMatthew Ahrens spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) { 3189cde58dbcSMatthew Ahrens zap_cursor_t zc; 3190cde58dbcSMatthew Ahrens zap_attribute_t za; 3191cde58dbcSMatthew Ahrens 31923b2aab18SMatthew Ahrens for (zap_cursor_init(&zc, dp->dp_meta_objset, 3193c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_next_clones_obj); 31943b2aab18SMatthew Ahrens zap_cursor_retrieve(&zc, &za) == 0; 31953b2aab18SMatthew Ahrens zap_cursor_advance(&zc)) { 31963b2aab18SMatthew Ahrens dsl_dataset_t *cnds; 31973b2aab18SMatthew Ahrens uint64_t o; 3198a9799022Sck 31993b2aab18SMatthew Ahrens if (za.za_first_integer == oldnext_obj) { 32003b2aab18SMatthew Ahrens /* 32013b2aab18SMatthew Ahrens * We've already moved the 32023b2aab18SMatthew Ahrens * origin's reference. 32033b2aab18SMatthew Ahrens */ 32043b2aab18SMatthew Ahrens continue; 32053b2aab18SMatthew Ahrens } 3206a9799022Sck 32073b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold_obj(dp, 32083b2aab18SMatthew Ahrens za.za_first_integer, FTAG, &cnds)); 3209c1379625SJustin T. Gibbs o = dsl_dir_phys(cnds->ds_dir)-> 3210c1379625SJustin T. Gibbs dd_head_dataset_obj; 3211a9799022Sck 32123b2aab18SMatthew Ahrens VERIFY0(zap_remove_int(dp->dp_meta_objset, 3213c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_clones, o, tx)); 32143b2aab18SMatthew Ahrens VERIFY0(zap_add_int(dp->dp_meta_objset, 3215c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_clones, o, tx)); 32163b2aab18SMatthew Ahrens dsl_dataset_rele(cnds, FTAG); 32173b2aab18SMatthew Ahrens } 32183b2aab18SMatthew Ahrens zap_cursor_fini(&zc); 32193b2aab18SMatthew Ahrens } 32209082849eSck 32213b2aab18SMatthew Ahrens ASSERT(!dsl_prop_hascb(ds)); 3222a9799022Sck } 3223a9799022Sck 3224a9799022Sck /* 32253b2aab18SMatthew Ahrens * Change space accounting. 32263b2aab18SMatthew Ahrens * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either 32273b2aab18SMatthew Ahrens * both be valid, or both be 0 (resulting in delta == 0). This 32283b2aab18SMatthew Ahrens * is true for each of {clone,origin} independently. 3229a9799022Sck */ 3230a9799022Sck 32313b2aab18SMatthew Ahrens delta = ddpa->cloneusedsnap - 3232c1379625SJustin T. Gibbs dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]; 32333b2aab18SMatthew Ahrens ASSERT3S(delta, >=, 0); 32343b2aab18SMatthew Ahrens ASSERT3U(ddpa->used, >=, delta); 32353b2aab18SMatthew Ahrens dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx); 32363b2aab18SMatthew Ahrens dsl_dir_diduse_space(dd, DD_USED_HEAD, 32373b2aab18SMatthew Ahrens ddpa->used - delta, ddpa->comp, ddpa->uncomp, tx); 32383b2aab18SMatthew Ahrens 32393b2aab18SMatthew Ahrens delta = ddpa->originusedsnap - 3240c1379625SJustin T. Gibbs dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP]; 32413b2aab18SMatthew Ahrens ASSERT3S(delta, <=, 0); 32423b2aab18SMatthew Ahrens ASSERT3U(ddpa->used, >=, -delta); 32433b2aab18SMatthew Ahrens dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx); 32443b2aab18SMatthew Ahrens dsl_dir_diduse_space(odd, DD_USED_HEAD, 32453b2aab18SMatthew Ahrens -ddpa->used - delta, -ddpa->comp, -ddpa->uncomp, tx); 32463b2aab18SMatthew Ahrens 3247c1379625SJustin T. Gibbs dsl_dataset_phys(origin_ds)->ds_unique_bytes = ddpa->unique; 32483b2aab18SMatthew Ahrens 32493b2aab18SMatthew Ahrens /* log history record */ 32503b2aab18SMatthew Ahrens spa_history_log_internal_ds(hds, "promote", tx, ""); 32513b2aab18SMatthew Ahrens 32523b2aab18SMatthew Ahrens dsl_dir_rele(odd, FTAG); 32533b2aab18SMatthew Ahrens promote_rele(ddpa, FTAG); 3254a9799022Sck } 3255a9799022Sck 32563b2aab18SMatthew Ahrens /* 32573b2aab18SMatthew Ahrens * Make a list of dsl_dataset_t's for the snapshots between first_obj 32583b2aab18SMatthew Ahrens * (exclusive) and last_obj (inclusive). The list will be in reverse 32593b2aab18SMatthew Ahrens * order (last_obj will be the list_head()). If first_obj == 0, do all 32603b2aab18SMatthew Ahrens * snapshots back to this dataset's origin. 32613b2aab18SMatthew Ahrens */ 3262a9799022Sck static int 32633b2aab18SMatthew Ahrens snaplist_make(dsl_pool_t *dp, 32643b2aab18SMatthew Ahrens uint64_t first_obj, uint64_t last_obj, list_t *l, void *tag) 3265a9799022Sck { 32663b2aab18SMatthew Ahrens uint64_t obj = last_obj; 3267a9799022Sck 32683b2aab18SMatthew Ahrens list_create(l, sizeof (struct promotenode), 32693b2aab18SMatthew Ahrens offsetof(struct promotenode, link)); 3270a9799022Sck 32713b2aab18SMatthew Ahrens while (obj != first_obj) { 32723b2aab18SMatthew Ahrens dsl_dataset_t *ds; 32733b2aab18SMatthew Ahrens struct promotenode *snap; 32743b2aab18SMatthew Ahrens int err; 327592241e0bSTom Erickson 32763b2aab18SMatthew Ahrens err = dsl_dataset_hold_obj(dp, obj, tag, &ds); 32773b2aab18SMatthew Ahrens ASSERT(err != ENOENT); 32783b2aab18SMatthew Ahrens if (err != 0) 32793b2aab18SMatthew Ahrens return (err); 3280a9799022Sck 32813b2aab18SMatthew Ahrens if (first_obj == 0) 3282c1379625SJustin T. Gibbs first_obj = dsl_dir_phys(ds->ds_dir)->dd_origin_obj; 32833b2aab18SMatthew Ahrens 32843b2aab18SMatthew Ahrens snap = kmem_alloc(sizeof (*snap), KM_SLEEP); 32853b2aab18SMatthew Ahrens snap->ds = ds; 32863b2aab18SMatthew Ahrens list_insert_tail(l, snap); 3287c1379625SJustin T. Gibbs obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 32883b2aab18SMatthew Ahrens } 3289a9799022Sck 3290a9799022Sck return (0); 3291a9799022Sck } 3292a9799022Sck 32933b2aab18SMatthew Ahrens static int 32943b2aab18SMatthew Ahrens snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep) 3295a9799022Sck { 32963b2aab18SMatthew Ahrens struct promotenode *snap; 3297a9799022Sck 32983b2aab18SMatthew Ahrens *spacep = 0; 32993b2aab18SMatthew Ahrens for (snap = list_head(l); snap; snap = list_next(l, snap)) { 33003b2aab18SMatthew Ahrens uint64_t used, comp, uncomp; 33013b2aab18SMatthew Ahrens dsl_deadlist_space_range(&snap->ds->ds_deadlist, 33023b2aab18SMatthew Ahrens mintxg, UINT64_MAX, &used, &comp, &uncomp); 33033b2aab18SMatthew Ahrens *spacep += used; 330492241e0bSTom Erickson } 33053b2aab18SMatthew Ahrens return (0); 3306a9799022Sck } 3307a9799022Sck 33083b2aab18SMatthew Ahrens static void 33093b2aab18SMatthew Ahrens snaplist_destroy(list_t *l, void *tag) 3310a9799022Sck { 33113b2aab18SMatthew Ahrens struct promotenode *snap; 331292241e0bSTom Erickson 33133b2aab18SMatthew Ahrens if (l == NULL || !list_link_active(&l->list_head)) 33143b2aab18SMatthew Ahrens return; 3315a9799022Sck 33163b2aab18SMatthew Ahrens while ((snap = list_tail(l)) != NULL) { 33173b2aab18SMatthew Ahrens list_remove(l, snap); 33183b2aab18SMatthew Ahrens dsl_dataset_rele(snap->ds, tag); 33193b2aab18SMatthew Ahrens kmem_free(snap, sizeof (*snap)); 33203b2aab18SMatthew Ahrens } 33213b2aab18SMatthew Ahrens list_destroy(l); 3322a9799022Sck } 3323a9799022Sck 3324a9799022Sck static int 33253b2aab18SMatthew Ahrens promote_hold(dsl_dataset_promote_arg_t *ddpa, dsl_pool_t *dp, void *tag) 3326a9799022Sck { 33273b2aab18SMatthew Ahrens int error; 33283b2aab18SMatthew Ahrens dsl_dir_t *dd; 33293b2aab18SMatthew Ahrens struct promotenode *snap; 3330a9799022Sck 33313b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddpa->ddpa_clonename, tag, 33323b2aab18SMatthew Ahrens &ddpa->ddpa_clone); 33333b2aab18SMatthew Ahrens if (error != 0) 33343b2aab18SMatthew Ahrens return (error); 33353b2aab18SMatthew Ahrens dd = ddpa->ddpa_clone->ds_dir; 3336a9799022Sck 3337bc9014e6SJustin Gibbs if (ddpa->ddpa_clone->ds_is_snapshot || 33383b2aab18SMatthew Ahrens !dsl_dir_is_clone(dd)) { 33393b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->ddpa_clone, tag); 3340be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 33413b2aab18SMatthew Ahrens } 3342a9799022Sck 3343c1379625SJustin T. Gibbs error = snaplist_make(dp, 0, dsl_dir_phys(dd)->dd_origin_obj, 33443b2aab18SMatthew Ahrens &ddpa->shared_snaps, tag); 33453b2aab18SMatthew Ahrens if (error != 0) 33463b2aab18SMatthew Ahrens goto out; 3347a9799022Sck 33483b2aab18SMatthew Ahrens error = snaplist_make(dp, 0, ddpa->ddpa_clone->ds_object, 33493b2aab18SMatthew Ahrens &ddpa->clone_snaps, tag); 33503b2aab18SMatthew Ahrens if (error != 0) 33513b2aab18SMatthew Ahrens goto out; 3352a9799022Sck 33533b2aab18SMatthew Ahrens snap = list_head(&ddpa->shared_snaps); 3354c1379625SJustin T. Gibbs ASSERT3U(snap->ds->ds_object, ==, dsl_dir_phys(dd)->dd_origin_obj); 3355c1379625SJustin T. Gibbs error = snaplist_make(dp, dsl_dir_phys(dd)->dd_origin_obj, 3356c1379625SJustin T. Gibbs dsl_dir_phys(snap->ds->ds_dir)->dd_head_dataset_obj, 33573b2aab18SMatthew Ahrens &ddpa->origin_snaps, tag); 33583b2aab18SMatthew Ahrens if (error != 0) 33593b2aab18SMatthew Ahrens goto out; 3360379c004dSEric Schrock 3361c1379625SJustin T. Gibbs if (dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj != 0) { 33623b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, 3363c1379625SJustin T. Gibbs dsl_dir_phys(snap->ds->ds_dir)->dd_origin_obj, 33643b2aab18SMatthew Ahrens tag, &ddpa->origin_origin); 33653b2aab18SMatthew Ahrens if (error != 0) 33663b2aab18SMatthew Ahrens goto out; 3367379c004dSEric Schrock } 33683b2aab18SMatthew Ahrens out: 33693b2aab18SMatthew Ahrens if (error != 0) 33703b2aab18SMatthew Ahrens promote_rele(ddpa, tag); 33713b2aab18SMatthew Ahrens return (error); 3372a9799022Sck } 3373a9799022Sck 3374a9799022Sck static void 33753b2aab18SMatthew Ahrens promote_rele(dsl_dataset_promote_arg_t *ddpa, void *tag) 3376a9799022Sck { 33773b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->shared_snaps, tag); 33783b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->clone_snaps, tag); 33793b2aab18SMatthew Ahrens snaplist_destroy(&ddpa->origin_snaps, tag); 33803b2aab18SMatthew Ahrens if (ddpa->origin_origin != NULL) 33813b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->origin_origin, tag); 33823b2aab18SMatthew Ahrens dsl_dataset_rele(ddpa->ddpa_clone, tag); 33833b2aab18SMatthew Ahrens } 338402c8f3f0SMatthew Ahrens 33853b2aab18SMatthew Ahrens /* 33863b2aab18SMatthew Ahrens * Promote a clone. 33873b2aab18SMatthew Ahrens * 33883b2aab18SMatthew Ahrens * If it fails due to a conflicting snapshot name, "conflsnap" will be filled 33899adfa60dSMatthew Ahrens * in with the name. (It must be at least ZFS_MAX_DATASET_NAME_LEN bytes long.) 33903b2aab18SMatthew Ahrens */ 33913b2aab18SMatthew Ahrens int 33923b2aab18SMatthew Ahrens dsl_dataset_promote(const char *name, char *conflsnap) 33933b2aab18SMatthew Ahrens { 33943b2aab18SMatthew Ahrens dsl_dataset_promote_arg_t ddpa = { 0 }; 33953b2aab18SMatthew Ahrens uint64_t numsnaps; 33963b2aab18SMatthew Ahrens int error; 3397dfc11533SChris Williamson nvpair_t *snap_pair; 33983b2aab18SMatthew Ahrens objset_t *os; 339992241e0bSTom Erickson 34003b2aab18SMatthew Ahrens /* 34013b2aab18SMatthew Ahrens * We will modify space proportional to the number of 34023b2aab18SMatthew Ahrens * snapshots. Compute numsnaps. 34033b2aab18SMatthew Ahrens */ 34043b2aab18SMatthew Ahrens error = dmu_objset_hold(name, FTAG, &os); 34053b2aab18SMatthew Ahrens if (error != 0) 34063b2aab18SMatthew Ahrens return (error); 34073b2aab18SMatthew Ahrens error = zap_count(dmu_objset_pool(os)->dp_meta_objset, 3408c1379625SJustin T. Gibbs dsl_dataset_phys(dmu_objset_ds(os))->ds_snapnames_zapobj, 3409c1379625SJustin T. Gibbs &numsnaps); 34103b2aab18SMatthew Ahrens dmu_objset_rele(os, FTAG); 34113b2aab18SMatthew Ahrens if (error != 0) 34123b2aab18SMatthew Ahrens return (error); 341302c8f3f0SMatthew Ahrens 34143b2aab18SMatthew Ahrens ddpa.ddpa_clonename = name; 3415dfc11533SChris Williamson ddpa.err_ds = fnvlist_alloc(); 3416a2afb611SJerry Jelinek ddpa.cr = CRED(); 341702c8f3f0SMatthew Ahrens 3418dfc11533SChris Williamson error = dsl_sync_task(name, dsl_dataset_promote_check, 34197d46dc6cSMatthew Ahrens dsl_dataset_promote_sync, &ddpa, 3420dfc11533SChris Williamson 2 + numsnaps, ZFS_SPACE_CHECK_RESERVED); 3421dfc11533SChris Williamson 3422dfc11533SChris Williamson /* 3423dfc11533SChris Williamson * Return the first conflicting snapshot found. 3424dfc11533SChris Williamson */ 3425dfc11533SChris Williamson snap_pair = nvlist_next_nvpair(ddpa.err_ds, NULL); 3426dfc11533SChris Williamson if (snap_pair != NULL && conflsnap != NULL) 3427dfc11533SChris Williamson (void) strcpy(conflsnap, nvpair_name(snap_pair)); 3428dfc11533SChris Williamson 3429dfc11533SChris Williamson fnvlist_free(ddpa.err_ds); 3430dfc11533SChris Williamson return (error); 3431a9799022Sck } 3432a9799022Sck 3433a9799022Sck int 34343b2aab18SMatthew Ahrens dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, 343591948b51SKeith M Wesolowski dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx) 3436a9799022Sck { 34375f7a8e6dSDan McDonald /* 34385f7a8e6dSDan McDonald * "slack" factor for received datasets with refquota set on them. 34395f7a8e6dSDan McDonald * See the bottom of this function for details on its use. 34405f7a8e6dSDan McDonald */ 34415f7a8e6dSDan McDonald uint64_t refquota_slack = DMU_MAX_ACCESS * spa_asize_inflation; 34423b2aab18SMatthew Ahrens int64_t unused_refres_delta; 3443a9799022Sck 34443b2aab18SMatthew Ahrens /* they should both be heads */ 3445bc9014e6SJustin Gibbs if (clone->ds_is_snapshot || 3446bc9014e6SJustin Gibbs origin_head->ds_is_snapshot) 3447be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 344892241e0bSTom Erickson 344934f2f8cfSMatthew Ahrens /* if we are not forcing, the branch point should be just before them */ 345034f2f8cfSMatthew Ahrens if (!force && clone->ds_prev != origin_head->ds_prev) 3451be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 3452a9799022Sck 34533b2aab18SMatthew Ahrens /* clone should be the clone (unless they are unrelated) */ 34543b2aab18SMatthew Ahrens if (clone->ds_prev != NULL && 34553b2aab18SMatthew Ahrens clone->ds_prev != clone->ds_dir->dd_pool->dp_origin_snap && 345634f2f8cfSMatthew Ahrens origin_head->ds_dir != clone->ds_prev->ds_dir) 3457be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 345892241e0bSTom Erickson 34593b2aab18SMatthew Ahrens /* the clone should be a child of the origin */ 34603b2aab18SMatthew Ahrens if (clone->ds_dir->dd_parent != origin_head->ds_dir) 3461be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 3462842727c2SChris Kirby 34633b2aab18SMatthew Ahrens /* origin_head shouldn't be modified unless 'force' */ 346434f2f8cfSMatthew Ahrens if (!force && 346534f2f8cfSMatthew Ahrens dsl_dataset_modified_since_snap(origin_head, origin_head->ds_prev)) 3466be6fd75aSMatthew Ahrens return (SET_ERROR(ETXTBSY)); 3467c99e4bdcSChris Kirby 34683b2aab18SMatthew Ahrens /* origin_head should have no long holds (e.g. is not mounted) */ 346991948b51SKeith M Wesolowski if (dsl_dataset_handoff_check(origin_head, owner, tx)) 3470be6fd75aSMatthew Ahrens return (SET_ERROR(EBUSY)); 34713b2aab18SMatthew Ahrens 34723b2aab18SMatthew Ahrens /* check amount of any unconsumed refreservation */ 34733b2aab18SMatthew Ahrens unused_refres_delta = 34743b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 3475c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_unique_bytes) - 34763b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 3477c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 34783b2aab18SMatthew Ahrens 34793b2aab18SMatthew Ahrens if (unused_refres_delta > 0 && 34803b2aab18SMatthew Ahrens unused_refres_delta > 34813b2aab18SMatthew Ahrens dsl_dir_space_available(origin_head->ds_dir, NULL, 0, TRUE)) 3482be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 34833b2aab18SMatthew Ahrens 34845f7a8e6dSDan McDonald /* 34855f7a8e6dSDan McDonald * The clone can't be too much over the head's refquota. 34865f7a8e6dSDan McDonald * 34875f7a8e6dSDan McDonald * To ensure that the entire refquota can be used, we allow one 34885f7a8e6dSDan McDonald * transaction to exceed the the refquota. Therefore, this check 34895f7a8e6dSDan McDonald * needs to also allow for the space referenced to be more than the 34905f7a8e6dSDan McDonald * refquota. The maximum amount of space that one transaction can use 34915f7a8e6dSDan McDonald * on disk is DMU_MAX_ACCESS * spa_asize_inflation. Allowing this 34925f7a8e6dSDan McDonald * overage ensures that we are able to receive a filesystem that 34935f7a8e6dSDan McDonald * exceeds the refquota on the source system. 34945f7a8e6dSDan McDonald * 34955f7a8e6dSDan McDonald * So that overage is the refquota_slack we use below. 34965f7a8e6dSDan McDonald */ 34973b2aab18SMatthew Ahrens if (origin_head->ds_quota != 0 && 3498c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_referenced_bytes > 34995f7a8e6dSDan McDonald origin_head->ds_quota + refquota_slack) 3500be6fd75aSMatthew Ahrens return (SET_ERROR(EDQUOT)); 3501c99e4bdcSChris Kirby 35023b2aab18SMatthew Ahrens return (0); 3503c99e4bdcSChris Kirby } 3504c99e4bdcSChris Kirby 35055cabbc6bSPrashanth Sreenivasa static void 35065cabbc6bSPrashanth Sreenivasa dsl_dataset_swap_remap_deadlists(dsl_dataset_t *clone, 35075cabbc6bSPrashanth Sreenivasa dsl_dataset_t *origin, dmu_tx_t *tx) 35085cabbc6bSPrashanth Sreenivasa { 35095cabbc6bSPrashanth Sreenivasa uint64_t clone_remap_dl_obj, origin_remap_dl_obj; 35105cabbc6bSPrashanth Sreenivasa dsl_pool_t *dp = dmu_tx_pool(tx); 35115cabbc6bSPrashanth Sreenivasa 35125cabbc6bSPrashanth Sreenivasa ASSERT(dsl_pool_sync_context(dp)); 35135cabbc6bSPrashanth Sreenivasa 35145cabbc6bSPrashanth Sreenivasa clone_remap_dl_obj = dsl_dataset_get_remap_deadlist_object(clone); 35155cabbc6bSPrashanth Sreenivasa origin_remap_dl_obj = dsl_dataset_get_remap_deadlist_object(origin); 35165cabbc6bSPrashanth Sreenivasa 35175cabbc6bSPrashanth Sreenivasa if (clone_remap_dl_obj != 0) { 35185cabbc6bSPrashanth Sreenivasa dsl_deadlist_close(&clone->ds_remap_deadlist); 35195cabbc6bSPrashanth Sreenivasa dsl_dataset_unset_remap_deadlist_object(clone, tx); 35205cabbc6bSPrashanth Sreenivasa } 35215cabbc6bSPrashanth Sreenivasa if (origin_remap_dl_obj != 0) { 35225cabbc6bSPrashanth Sreenivasa dsl_deadlist_close(&origin->ds_remap_deadlist); 35235cabbc6bSPrashanth Sreenivasa dsl_dataset_unset_remap_deadlist_object(origin, tx); 35245cabbc6bSPrashanth Sreenivasa } 35255cabbc6bSPrashanth Sreenivasa 35265cabbc6bSPrashanth Sreenivasa if (clone_remap_dl_obj != 0) { 35275cabbc6bSPrashanth Sreenivasa dsl_dataset_set_remap_deadlist_object(origin, 35285cabbc6bSPrashanth Sreenivasa clone_remap_dl_obj, tx); 35295cabbc6bSPrashanth Sreenivasa dsl_deadlist_open(&origin->ds_remap_deadlist, 35305cabbc6bSPrashanth Sreenivasa dp->dp_meta_objset, clone_remap_dl_obj); 35315cabbc6bSPrashanth Sreenivasa } 35325cabbc6bSPrashanth Sreenivasa if (origin_remap_dl_obj != 0) { 35335cabbc6bSPrashanth Sreenivasa dsl_dataset_set_remap_deadlist_object(clone, 35345cabbc6bSPrashanth Sreenivasa origin_remap_dl_obj, tx); 35355cabbc6bSPrashanth Sreenivasa dsl_deadlist_open(&clone->ds_remap_deadlist, 35365cabbc6bSPrashanth Sreenivasa dp->dp_meta_objset, origin_remap_dl_obj); 35375cabbc6bSPrashanth Sreenivasa } 35385cabbc6bSPrashanth Sreenivasa } 35395cabbc6bSPrashanth Sreenivasa 3540a7f53a56SChris Kirby void 35413b2aab18SMatthew Ahrens dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, 35423b2aab18SMatthew Ahrens dsl_dataset_t *origin_head, dmu_tx_t *tx) 3543a7f53a56SChris Kirby { 35443b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 35453b2aab18SMatthew Ahrens int64_t unused_refres_delta; 3546a7f53a56SChris Kirby 35473b2aab18SMatthew Ahrens ASSERT(clone->ds_reserved == 0); 35485f7a8e6dSDan McDonald /* 35495f7a8e6dSDan McDonald * NOTE: On DEBUG kernels there could be a race between this and 35505f7a8e6dSDan McDonald * the check function if spa_asize_inflation is adjusted... 35515f7a8e6dSDan McDonald */ 35523b2aab18SMatthew Ahrens ASSERT(origin_head->ds_quota == 0 || 35535f7a8e6dSDan McDonald dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota + 35545f7a8e6dSDan McDonald DMU_MAX_ACCESS * spa_asize_inflation); 355534f2f8cfSMatthew Ahrens ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev); 3556842727c2SChris Kirby 3557ca0cc391SMatthew Ahrens /* 3558ca0cc391SMatthew Ahrens * Swap per-dataset feature flags. 3559ca0cc391SMatthew Ahrens */ 3560ca0cc391SMatthew Ahrens for (spa_feature_t f = 0; f < SPA_FEATURES; f++) { 3561ca0cc391SMatthew Ahrens if (!(spa_feature_table[f].fi_flags & 3562ca0cc391SMatthew Ahrens ZFEATURE_FLAG_PER_DATASET)) { 3563ca0cc391SMatthew Ahrens ASSERT(!clone->ds_feature_inuse[f]); 3564ca0cc391SMatthew Ahrens ASSERT(!origin_head->ds_feature_inuse[f]); 3565ca0cc391SMatthew Ahrens continue; 3566ca0cc391SMatthew Ahrens } 3567ca0cc391SMatthew Ahrens 3568ca0cc391SMatthew Ahrens boolean_t clone_inuse = clone->ds_feature_inuse[f]; 3569ca0cc391SMatthew Ahrens boolean_t origin_head_inuse = origin_head->ds_feature_inuse[f]; 3570ca0cc391SMatthew Ahrens 3571ca0cc391SMatthew Ahrens if (clone_inuse) { 3572ca0cc391SMatthew Ahrens dsl_dataset_deactivate_feature(clone->ds_object, f, tx); 3573ca0cc391SMatthew Ahrens clone->ds_feature_inuse[f] = B_FALSE; 3574ca0cc391SMatthew Ahrens } 3575ca0cc391SMatthew Ahrens if (origin_head_inuse) { 3576ca0cc391SMatthew Ahrens dsl_dataset_deactivate_feature(origin_head->ds_object, 3577ca0cc391SMatthew Ahrens f, tx); 3578ca0cc391SMatthew Ahrens origin_head->ds_feature_inuse[f] = B_FALSE; 3579ca0cc391SMatthew Ahrens } 3580ca0cc391SMatthew Ahrens if (clone_inuse) { 3581ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(origin_head->ds_object, 3582ca0cc391SMatthew Ahrens f, tx); 3583ca0cc391SMatthew Ahrens origin_head->ds_feature_inuse[f] = B_TRUE; 3584ca0cc391SMatthew Ahrens } 3585ca0cc391SMatthew Ahrens if (origin_head_inuse) { 3586ca0cc391SMatthew Ahrens dsl_dataset_activate_feature(clone->ds_object, f, tx); 3587ca0cc391SMatthew Ahrens clone->ds_feature_inuse[f] = B_TRUE; 3588ca0cc391SMatthew Ahrens } 3589ca0cc391SMatthew Ahrens } 3590ca0cc391SMatthew Ahrens 35913b2aab18SMatthew Ahrens dmu_buf_will_dirty(clone->ds_dbuf, tx); 35923b2aab18SMatthew Ahrens dmu_buf_will_dirty(origin_head->ds_dbuf, tx); 3593842727c2SChris Kirby 35943b2aab18SMatthew Ahrens if (clone->ds_objset != NULL) { 35953b2aab18SMatthew Ahrens dmu_objset_evict(clone->ds_objset); 35963b2aab18SMatthew Ahrens clone->ds_objset = NULL; 35973b2aab18SMatthew Ahrens } 3598842727c2SChris Kirby 35993b2aab18SMatthew Ahrens if (origin_head->ds_objset != NULL) { 36003b2aab18SMatthew Ahrens dmu_objset_evict(origin_head->ds_objset); 36013b2aab18SMatthew Ahrens origin_head->ds_objset = NULL; 3602842727c2SChris Kirby } 3603842727c2SChris Kirby 36043b2aab18SMatthew Ahrens unused_refres_delta = 36053b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 3606c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_unique_bytes) - 36073b2aab18SMatthew Ahrens (int64_t)MIN(origin_head->ds_reserved, 3608c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 36093b2aab18SMatthew Ahrens 36103b2aab18SMatthew Ahrens /* 36113b2aab18SMatthew Ahrens * Reset origin's unique bytes, if it exists. 36123b2aab18SMatthew Ahrens */ 36133b2aab18SMatthew Ahrens if (clone->ds_prev) { 36143b2aab18SMatthew Ahrens dsl_dataset_t *origin = clone->ds_prev; 36153b2aab18SMatthew Ahrens uint64_t comp, uncomp; 36163b2aab18SMatthew Ahrens 36173b2aab18SMatthew Ahrens dmu_buf_will_dirty(origin->ds_dbuf, tx); 36183b2aab18SMatthew Ahrens dsl_deadlist_space_range(&clone->ds_deadlist, 3619c1379625SJustin T. Gibbs dsl_dataset_phys(origin)->ds_prev_snap_txg, UINT64_MAX, 3620c1379625SJustin T. Gibbs &dsl_dataset_phys(origin)->ds_unique_bytes, &comp, &uncomp); 36213b2aab18SMatthew Ahrens } 36223b2aab18SMatthew Ahrens 36233b2aab18SMatthew Ahrens /* swap blkptrs */ 36243b2aab18SMatthew Ahrens { 3625c166b69dSPaul Dagnelie rrw_enter(&clone->ds_bp_rwlock, RW_WRITER, FTAG); 3626c166b69dSPaul Dagnelie rrw_enter(&origin_head->ds_bp_rwlock, RW_WRITER, FTAG); 36273b2aab18SMatthew Ahrens blkptr_t tmp; 3628c1379625SJustin T. Gibbs tmp = dsl_dataset_phys(origin_head)->ds_bp; 3629c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_bp = 3630c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_bp; 3631c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_bp = tmp; 3632c166b69dSPaul Dagnelie rrw_exit(&origin_head->ds_bp_rwlock, FTAG); 3633c166b69dSPaul Dagnelie rrw_exit(&clone->ds_bp_rwlock, FTAG); 36343b2aab18SMatthew Ahrens } 36353b2aab18SMatthew Ahrens 36363b2aab18SMatthew Ahrens /* set dd_*_bytes */ 36373b2aab18SMatthew Ahrens { 36383b2aab18SMatthew Ahrens int64_t dused, dcomp, duncomp; 36393b2aab18SMatthew Ahrens uint64_t cdl_used, cdl_comp, cdl_uncomp; 36403b2aab18SMatthew Ahrens uint64_t odl_used, odl_comp, odl_uncomp; 36413b2aab18SMatthew Ahrens 3642c1379625SJustin T. Gibbs ASSERT3U(dsl_dir_phys(clone->ds_dir)-> 36433b2aab18SMatthew Ahrens dd_used_breakdown[DD_USED_SNAP], ==, 0); 36443b2aab18SMatthew Ahrens 36453b2aab18SMatthew Ahrens dsl_deadlist_space(&clone->ds_deadlist, 36463b2aab18SMatthew Ahrens &cdl_used, &cdl_comp, &cdl_uncomp); 36473b2aab18SMatthew Ahrens dsl_deadlist_space(&origin_head->ds_deadlist, 36483b2aab18SMatthew Ahrens &odl_used, &odl_comp, &odl_uncomp); 364915508ac0SChris Kirby 3650c1379625SJustin T. Gibbs dused = dsl_dataset_phys(clone)->ds_referenced_bytes + 3651c1379625SJustin T. Gibbs cdl_used - 3652c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_referenced_bytes + 3653c1379625SJustin T. Gibbs odl_used); 3654c1379625SJustin T. Gibbs dcomp = dsl_dataset_phys(clone)->ds_compressed_bytes + 3655c1379625SJustin T. Gibbs cdl_comp - 3656c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_compressed_bytes + 3657c1379625SJustin T. Gibbs odl_comp); 3658c1379625SJustin T. Gibbs duncomp = dsl_dataset_phys(clone)->ds_uncompressed_bytes + 36593b2aab18SMatthew Ahrens cdl_uncomp - 3660c1379625SJustin T. Gibbs (dsl_dataset_phys(origin_head)->ds_uncompressed_bytes + 3661c1379625SJustin T. Gibbs odl_uncomp); 3662842727c2SChris Kirby 36633b2aab18SMatthew Ahrens dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_HEAD, 36643b2aab18SMatthew Ahrens dused, dcomp, duncomp, tx); 36653b2aab18SMatthew Ahrens dsl_dir_diduse_space(clone->ds_dir, DD_USED_HEAD, 36663b2aab18SMatthew Ahrens -dused, -dcomp, -duncomp, tx); 3667842727c2SChris Kirby 3668842727c2SChris Kirby /* 36693b2aab18SMatthew Ahrens * The difference in the space used by snapshots is the 36703b2aab18SMatthew Ahrens * difference in snapshot space due to the head's 36713b2aab18SMatthew Ahrens * deadlist (since that's the only thing that's 36723b2aab18SMatthew Ahrens * changing that affects the snapused). 3673842727c2SChris Kirby */ 36743b2aab18SMatthew Ahrens dsl_deadlist_space_range(&clone->ds_deadlist, 36753b2aab18SMatthew Ahrens origin_head->ds_dir->dd_origin_txg, UINT64_MAX, 36763b2aab18SMatthew Ahrens &cdl_used, &cdl_comp, &cdl_uncomp); 36773b2aab18SMatthew Ahrens dsl_deadlist_space_range(&origin_head->ds_deadlist, 36783b2aab18SMatthew Ahrens origin_head->ds_dir->dd_origin_txg, UINT64_MAX, 36793b2aab18SMatthew Ahrens &odl_used, &odl_comp, &odl_uncomp); 36803b2aab18SMatthew Ahrens dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used, 36813b2aab18SMatthew Ahrens DD_USED_HEAD, DD_USED_SNAP, tx); 3682842727c2SChris Kirby } 3683842727c2SChris Kirby 36843b2aab18SMatthew Ahrens /* swap ds_*_bytes */ 3685c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_referenced_bytes, 3686c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_referenced_bytes); 3687c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_compressed_bytes, 3688c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_compressed_bytes); 3689c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_uncompressed_bytes, 3690c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_uncompressed_bytes); 3691c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_unique_bytes, 3692c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_unique_bytes); 3693842727c2SChris Kirby 36943b2aab18SMatthew Ahrens /* apply any parent delta for change in unconsumed refreservation */ 36953b2aab18SMatthew Ahrens dsl_dir_diduse_space(origin_head->ds_dir, DD_USED_REFRSRV, 36963b2aab18SMatthew Ahrens unused_refres_delta, 0, 0, tx); 3697ca45db41SChris Kirby 36983b2aab18SMatthew Ahrens /* 36993b2aab18SMatthew Ahrens * Swap deadlists. 37003b2aab18SMatthew Ahrens */ 37013b2aab18SMatthew Ahrens dsl_deadlist_close(&clone->ds_deadlist); 37023b2aab18SMatthew Ahrens dsl_deadlist_close(&origin_head->ds_deadlist); 3703c1379625SJustin T. Gibbs SWITCH64(dsl_dataset_phys(origin_head)->ds_deadlist_obj, 3704c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_deadlist_obj); 37053b2aab18SMatthew Ahrens dsl_deadlist_open(&clone->ds_deadlist, dp->dp_meta_objset, 3706c1379625SJustin T. Gibbs dsl_dataset_phys(clone)->ds_deadlist_obj); 37073b2aab18SMatthew Ahrens dsl_deadlist_open(&origin_head->ds_deadlist, dp->dp_meta_objset, 3708c1379625SJustin T. Gibbs dsl_dataset_phys(origin_head)->ds_deadlist_obj); 37095cabbc6bSPrashanth Sreenivasa dsl_dataset_swap_remap_deadlists(clone, origin_head, tx); 3710842727c2SChris Kirby 37113b2aab18SMatthew Ahrens dsl_scan_ds_clone_swapped(origin_head, clone, tx); 3712842727c2SChris Kirby 37133b2aab18SMatthew Ahrens spa_history_log_internal_ds(clone, "clone swap", tx, 37143b2aab18SMatthew Ahrens "parent=%s", origin_head->ds_dir->dd_myname); 3715842727c2SChris Kirby } 3716842727c2SChris Kirby 37173b2aab18SMatthew Ahrens /* 37183b2aab18SMatthew Ahrens * Given a pool name and a dataset object number in that pool, 37193b2aab18SMatthew Ahrens * return the name of that dataset. 37203b2aab18SMatthew Ahrens */ 3721a7f53a56SChris Kirby int 37223b2aab18SMatthew Ahrens dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) 3723a7f53a56SChris Kirby { 37243b2aab18SMatthew Ahrens dsl_pool_t *dp; 37253b2aab18SMatthew Ahrens dsl_dataset_t *ds; 3726a7f53a56SChris Kirby int error; 3727a7f53a56SChris Kirby 37283b2aab18SMatthew Ahrens error = dsl_pool_hold(pname, FTAG, &dp); 37293b2aab18SMatthew Ahrens if (error != 0) 37303b2aab18SMatthew Ahrens return (error); 37313b2aab18SMatthew Ahrens 37323b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); 37333b2aab18SMatthew Ahrens if (error == 0) { 37343b2aab18SMatthew Ahrens dsl_dataset_name(ds, buf); 37353b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 37363b2aab18SMatthew Ahrens } 37373b2aab18SMatthew Ahrens dsl_pool_rele(dp, FTAG); 3738a7f53a56SChris Kirby 3739a7f53a56SChris Kirby return (error); 3740a7f53a56SChris Kirby } 3741a7f53a56SChris Kirby 3742842727c2SChris Kirby int 37433b2aab18SMatthew Ahrens dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, 37443b2aab18SMatthew Ahrens uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) 3745842727c2SChris Kirby { 37463b2aab18SMatthew Ahrens int error = 0; 3747842727c2SChris Kirby 37483b2aab18SMatthew Ahrens ASSERT3S(asize, >, 0); 3749842727c2SChris Kirby 37503b2aab18SMatthew Ahrens /* 37513b2aab18SMatthew Ahrens * *ref_rsrv is the portion of asize that will come from any 37523b2aab18SMatthew Ahrens * unconsumed refreservation space. 37533b2aab18SMatthew Ahrens */ 37543b2aab18SMatthew Ahrens *ref_rsrv = 0; 3755842727c2SChris Kirby 37563b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 37573b2aab18SMatthew Ahrens /* 37583b2aab18SMatthew Ahrens * Make a space adjustment for reserved bytes. 37593b2aab18SMatthew Ahrens */ 3760c1379625SJustin T. Gibbs if (ds->ds_reserved > dsl_dataset_phys(ds)->ds_unique_bytes) { 37613b2aab18SMatthew Ahrens ASSERT3U(*used, >=, 3762c1379625SJustin T. Gibbs ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); 3763c1379625SJustin T. Gibbs *used -= 3764c1379625SJustin T. Gibbs (ds->ds_reserved - dsl_dataset_phys(ds)->ds_unique_bytes); 37653b2aab18SMatthew Ahrens *ref_rsrv = 37663b2aab18SMatthew Ahrens asize - MIN(asize, parent_delta(ds, asize + inflight)); 3767842727c2SChris Kirby } 3768842727c2SChris Kirby 37693b2aab18SMatthew Ahrens if (!check_quota || ds->ds_quota == 0) { 37703b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 37713b2aab18SMatthew Ahrens return (0); 3772842727c2SChris Kirby } 37733b2aab18SMatthew Ahrens /* 37743b2aab18SMatthew Ahrens * If they are requesting more space, and our current estimate 37753b2aab18SMatthew Ahrens * is over quota, they get to try again unless the actual 37763b2aab18SMatthew Ahrens * on-disk is over quota and there are no pending changes (which 37773b2aab18SMatthew Ahrens * may free up space for us). 37783b2aab18SMatthew Ahrens */ 3779c1379625SJustin T. Gibbs if (dsl_dataset_phys(ds)->ds_referenced_bytes + inflight >= 3780c1379625SJustin T. Gibbs ds->ds_quota) { 37813b2aab18SMatthew Ahrens if (inflight > 0 || 3782c1379625SJustin T. Gibbs dsl_dataset_phys(ds)->ds_referenced_bytes < ds->ds_quota) 3783be6fd75aSMatthew Ahrens error = SET_ERROR(ERESTART); 37843b2aab18SMatthew Ahrens else 3785be6fd75aSMatthew Ahrens error = SET_ERROR(EDQUOT); 3786842727c2SChris Kirby } 37873b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 3788842727c2SChris Kirby 3789842727c2SChris Kirby return (error); 3790842727c2SChris Kirby } 3791842727c2SChris Kirby 37923b2aab18SMatthew Ahrens typedef struct dsl_dataset_set_qr_arg { 37933b2aab18SMatthew Ahrens const char *ddsqra_name; 37943b2aab18SMatthew Ahrens zprop_source_t ddsqra_source; 37953b2aab18SMatthew Ahrens uint64_t ddsqra_value; 37963b2aab18SMatthew Ahrens } dsl_dataset_set_qr_arg_t; 3797842727c2SChris Kirby 37983b2aab18SMatthew Ahrens 37993b2aab18SMatthew Ahrens /* ARGSUSED */ 3800842727c2SChris Kirby static int 38013b2aab18SMatthew Ahrens dsl_dataset_set_refquota_check(void *arg, dmu_tx_t *tx) 3802842727c2SChris Kirby { 38033b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 38043b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 38053b2aab18SMatthew Ahrens dsl_dataset_t *ds; 3806842727c2SChris Kirby int error; 38073b2aab18SMatthew Ahrens uint64_t newval; 3808842727c2SChris Kirby 38093b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_REFQUOTA) 3810be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 3811842727c2SChris Kirby 38123b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); 38133b2aab18SMatthew Ahrens if (error != 0) 38143b2aab18SMatthew Ahrens return (error); 38153b2aab18SMatthew Ahrens 3816bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 38173b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3818be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 3819842727c2SChris Kirby } 3820842727c2SChris Kirby 38213b2aab18SMatthew Ahrens error = dsl_prop_predict(ds->ds_dir, 38223b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 38233b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); 38243b2aab18SMatthew Ahrens if (error != 0) { 38253b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3826842727c2SChris Kirby return (error); 3827842727c2SChris Kirby } 3828842727c2SChris Kirby 38293b2aab18SMatthew Ahrens if (newval == 0) { 38303b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 38313b2aab18SMatthew Ahrens return (0); 38323b2aab18SMatthew Ahrens } 3833842727c2SChris Kirby 3834c1379625SJustin T. Gibbs if (newval < dsl_dataset_phys(ds)->ds_referenced_bytes || 38353b2aab18SMatthew Ahrens newval < ds->ds_reserved) { 38363b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3837be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 38383b2aab18SMatthew Ahrens } 38393b2aab18SMatthew Ahrens 38403b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3841842727c2SChris Kirby return (0); 3842842727c2SChris Kirby } 3843842727c2SChris Kirby 38443b2aab18SMatthew Ahrens static void 38453b2aab18SMatthew Ahrens dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx) 3846842727c2SChris Kirby { 38473b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 38483b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 38493b2aab18SMatthew Ahrens dsl_dataset_t *ds; 38503b2aab18SMatthew Ahrens uint64_t newval; 3851842727c2SChris Kirby 38523b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); 3853842727c2SChris Kirby 38543b2aab18SMatthew Ahrens dsl_prop_set_sync_impl(ds, 38553b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), 38563b2aab18SMatthew Ahrens ddsqra->ddsqra_source, sizeof (ddsqra->ddsqra_value), 1, 38573b2aab18SMatthew Ahrens &ddsqra->ddsqra_value, tx); 3858842727c2SChris Kirby 38593b2aab18SMatthew Ahrens VERIFY0(dsl_prop_get_int_ds(ds, 38603b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFQUOTA), &newval)); 3861842727c2SChris Kirby 38623b2aab18SMatthew Ahrens if (ds->ds_quota != newval) { 38633b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 38643b2aab18SMatthew Ahrens ds->ds_quota = newval; 3865842727c2SChris Kirby } 38663b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3867842727c2SChris Kirby } 3868842727c2SChris Kirby 38693b2aab18SMatthew Ahrens int 38703b2aab18SMatthew Ahrens dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, 38713b2aab18SMatthew Ahrens uint64_t refquota) 3872842727c2SChris Kirby { 38733b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t ddsqra; 3874842727c2SChris Kirby 38753b2aab18SMatthew Ahrens ddsqra.ddsqra_name = dsname; 38763b2aab18SMatthew Ahrens ddsqra.ddsqra_source = source; 38773b2aab18SMatthew Ahrens ddsqra.ddsqra_value = refquota; 38783b2aab18SMatthew Ahrens 38793b2aab18SMatthew Ahrens return (dsl_sync_task(dsname, dsl_dataset_set_refquota_check, 388086714001SSerapheim Dimitropoulos dsl_dataset_set_refquota_sync, &ddsqra, 0, 388186714001SSerapheim Dimitropoulos ZFS_SPACE_CHECK_EXTRA_RESERVED)); 3882842727c2SChris Kirby } 3883842727c2SChris Kirby 3884842727c2SChris Kirby static int 38853b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_check(void *arg, dmu_tx_t *tx) 3886842727c2SChris Kirby { 38873b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 38883b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 3889842727c2SChris Kirby dsl_dataset_t *ds; 3890842727c2SChris Kirby int error; 38913b2aab18SMatthew Ahrens uint64_t newval, unique; 3892d7747cbcSChris Kirby 38933b2aab18SMatthew Ahrens if (spa_version(dp->dp_spa) < SPA_VERSION_REFRESERVATION) 3894be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTSUP)); 3895842727c2SChris Kirby 38963b2aab18SMatthew Ahrens error = dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds); 38973b2aab18SMatthew Ahrens if (error != 0) 3898842727c2SChris Kirby return (error); 3899842727c2SChris Kirby 3900bc9014e6SJustin Gibbs if (ds->ds_is_snapshot) { 39013b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3902be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 3903842727c2SChris Kirby } 3904842727c2SChris Kirby 39053b2aab18SMatthew Ahrens error = dsl_prop_predict(ds->ds_dir, 39063b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 39073b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, &newval); 39083b2aab18SMatthew Ahrens if (error != 0) { 39093b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3910842727c2SChris Kirby return (error); 3911842727c2SChris Kirby } 3912842727c2SChris Kirby 39133b2aab18SMatthew Ahrens /* 39143b2aab18SMatthew Ahrens * If we are doing the preliminary check in open context, the 39153b2aab18SMatthew Ahrens * space estimates may be inaccurate. 39163b2aab18SMatthew Ahrens */ 39173b2aab18SMatthew Ahrens if (!dmu_tx_is_syncing(tx)) { 39183b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 39193b2aab18SMatthew Ahrens return (0); 3920842727c2SChris Kirby } 3921842727c2SChris Kirby 39223b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 39233b2aab18SMatthew Ahrens if (!DS_UNIQUE_IS_ACCURATE(ds)) 39243b2aab18SMatthew Ahrens dsl_dataset_recalc_head_uniq(ds); 3925c1379625SJustin T. Gibbs unique = dsl_dataset_phys(ds)->ds_unique_bytes; 39263b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 3927842727c2SChris Kirby 39283b2aab18SMatthew Ahrens if (MAX(unique, newval) > MAX(unique, ds->ds_reserved)) { 39293b2aab18SMatthew Ahrens uint64_t delta = MAX(unique, newval) - 39303b2aab18SMatthew Ahrens MAX(unique, ds->ds_reserved); 3931842727c2SChris Kirby 39323b2aab18SMatthew Ahrens if (delta > 39333b2aab18SMatthew Ahrens dsl_dir_space_available(ds->ds_dir, NULL, 0, B_TRUE) || 39343b2aab18SMatthew Ahrens (ds->ds_quota > 0 && newval > ds->ds_quota)) { 39353b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 3936be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 39373b2aab18SMatthew Ahrens } 3938842727c2SChris Kirby } 3939842727c2SChris Kirby 39403b2aab18SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 39413b2aab18SMatthew Ahrens return (0); 3942842727c2SChris Kirby } 3943842727c2SChris Kirby 39443b2aab18SMatthew Ahrens void 39453b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, 39463b2aab18SMatthew Ahrens zprop_source_t source, uint64_t value, dmu_tx_t *tx) 3947ca45db41SChris Kirby { 39483b2aab18SMatthew Ahrens uint64_t newval; 39493b2aab18SMatthew Ahrens uint64_t unique; 39503b2aab18SMatthew Ahrens int64_t delta; 3951ca45db41SChris Kirby 39523b2aab18SMatthew Ahrens dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 39533b2aab18SMatthew Ahrens source, sizeof (value), 1, &value, tx); 3954ca45db41SChris Kirby 39553b2aab18SMatthew Ahrens VERIFY0(dsl_prop_get_int_ds(ds, 39563b2aab18SMatthew Ahrens zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &newval)); 3957a7f53a56SChris Kirby 39583b2aab18SMatthew Ahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 39593b2aab18SMatthew Ahrens mutex_enter(&ds->ds_dir->dd_lock); 39603b2aab18SMatthew Ahrens mutex_enter(&ds->ds_lock); 39613b2aab18SMatthew Ahrens ASSERT(DS_UNIQUE_IS_ACCURATE(ds)); 3962c1379625SJustin T. Gibbs unique = dsl_dataset_phys(ds)->ds_unique_bytes; 39633b2aab18SMatthew Ahrens delta = MAX(0, (int64_t)(newval - unique)) - 39643b2aab18SMatthew Ahrens MAX(0, (int64_t)(ds->ds_reserved - unique)); 39653b2aab18SMatthew Ahrens ds->ds_reserved = newval; 39663b2aab18SMatthew Ahrens mutex_exit(&ds->ds_lock); 3967a7f53a56SChris Kirby 39683b2aab18SMatthew Ahrens dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx); 39693b2aab18SMatthew Ahrens mutex_exit(&ds->ds_dir->dd_lock); 3970ca45db41SChris Kirby } 3971ca45db41SChris Kirby 39723b2aab18SMatthew Ahrens static void 39733b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx) 3974842727c2SChris Kirby { 39753b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t *ddsqra = arg; 39763b2aab18SMatthew Ahrens dsl_pool_t *dp = dmu_tx_pool(tx); 3977842727c2SChris Kirby dsl_dataset_t *ds; 3978842727c2SChris Kirby 39793b2aab18SMatthew Ahrens VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds)); 39803b2aab18SMatthew Ahrens dsl_dataset_set_refreservation_sync_impl(ds, 39813b2aab18SMatthew Ahrens ddsqra->ddsqra_source, ddsqra->ddsqra_value, tx); 3982842727c2SChris Kirby dsl_dataset_rele(ds, FTAG); 3983842727c2SChris Kirby } 3984503ad85cSMatthew Ahrens 3985503ad85cSMatthew Ahrens int 39863b2aab18SMatthew Ahrens dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, 39873b2aab18SMatthew Ahrens uint64_t refreservation) 3988503ad85cSMatthew Ahrens { 39893b2aab18SMatthew Ahrens dsl_dataset_set_qr_arg_t ddsqra; 3990503ad85cSMatthew Ahrens 39913b2aab18SMatthew Ahrens ddsqra.ddsqra_name = dsname; 39923b2aab18SMatthew Ahrens ddsqra.ddsqra_source = source; 39933b2aab18SMatthew Ahrens ddsqra.ddsqra_value = refreservation; 39943b2aab18SMatthew Ahrens 39953b2aab18SMatthew Ahrens return (dsl_sync_task(dsname, dsl_dataset_set_refreservation_check, 399686714001SSerapheim Dimitropoulos dsl_dataset_set_refreservation_sync, &ddsqra, 0, 399786714001SSerapheim Dimitropoulos ZFS_SPACE_CHECK_EXTRA_RESERVED)); 3998503ad85cSMatthew Ahrens } 399919b94df9SMatthew Ahrens 400019b94df9SMatthew Ahrens /* 400119b94df9SMatthew Ahrens * Return (in *usedp) the amount of space written in new that is not 400219b94df9SMatthew Ahrens * present in oldsnap. New may be a snapshot or the head. Old must be 400319b94df9SMatthew Ahrens * a snapshot before new, in new's filesystem (or its origin). If not then 400419b94df9SMatthew Ahrens * fail and return EINVAL. 400519b94df9SMatthew Ahrens * 400619b94df9SMatthew Ahrens * The written space is calculated by considering two components: First, we 400719b94df9SMatthew Ahrens * ignore any freed space, and calculate the written as new's used space 400819b94df9SMatthew Ahrens * minus old's used space. Next, we add in the amount of space that was freed 400919b94df9SMatthew Ahrens * between the two snapshots, thus reducing new's used space relative to old's. 401019b94df9SMatthew Ahrens * Specifically, this is the space that was born before old->ds_creation_txg, 401119b94df9SMatthew Ahrens * and freed before new (ie. on new's deadlist or a previous deadlist). 401219b94df9SMatthew Ahrens * 401319b94df9SMatthew Ahrens * space freed [---------------------] 401419b94df9SMatthew Ahrens * snapshots ---O-------O--------O-------O------ 401519b94df9SMatthew Ahrens * oldsnap new 401619b94df9SMatthew Ahrens */ 401719b94df9SMatthew Ahrens int 401819b94df9SMatthew Ahrens dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, 401919b94df9SMatthew Ahrens uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 402019b94df9SMatthew Ahrens { 402119b94df9SMatthew Ahrens int err = 0; 402219b94df9SMatthew Ahrens uint64_t snapobj; 402319b94df9SMatthew Ahrens dsl_pool_t *dp = new->ds_dir->dd_pool; 402419b94df9SMatthew Ahrens 40253b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 40263b2aab18SMatthew Ahrens 402719b94df9SMatthew Ahrens *usedp = 0; 4028c1379625SJustin T. Gibbs *usedp += dsl_dataset_phys(new)->ds_referenced_bytes; 4029c1379625SJustin T. Gibbs *usedp -= dsl_dataset_phys(oldsnap)->ds_referenced_bytes; 403019b94df9SMatthew Ahrens 403119b94df9SMatthew Ahrens *compp = 0; 4032c1379625SJustin T. Gibbs *compp += dsl_dataset_phys(new)->ds_compressed_bytes; 4033c1379625SJustin T. Gibbs *compp -= dsl_dataset_phys(oldsnap)->ds_compressed_bytes; 403419b94df9SMatthew Ahrens 403519b94df9SMatthew Ahrens *uncompp = 0; 4036c1379625SJustin T. Gibbs *uncompp += dsl_dataset_phys(new)->ds_uncompressed_bytes; 4037c1379625SJustin T. Gibbs *uncompp -= dsl_dataset_phys(oldsnap)->ds_uncompressed_bytes; 403819b94df9SMatthew Ahrens 403919b94df9SMatthew Ahrens snapobj = new->ds_object; 404019b94df9SMatthew Ahrens while (snapobj != oldsnap->ds_object) { 404119b94df9SMatthew Ahrens dsl_dataset_t *snap; 404219b94df9SMatthew Ahrens uint64_t used, comp, uncomp; 404319b94df9SMatthew Ahrens 4044ad135b5dSChristopher Siden if (snapobj == new->ds_object) { 4045ad135b5dSChristopher Siden snap = new; 4046ad135b5dSChristopher Siden } else { 4047ad135b5dSChristopher Siden err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snap); 4048ad135b5dSChristopher Siden if (err != 0) 4049ad135b5dSChristopher Siden break; 4050ad135b5dSChristopher Siden } 405119b94df9SMatthew Ahrens 4052c1379625SJustin T. Gibbs if (dsl_dataset_phys(snap)->ds_prev_snap_txg == 4053c1379625SJustin T. Gibbs dsl_dataset_phys(oldsnap)->ds_creation_txg) { 405419b94df9SMatthew Ahrens /* 405519b94df9SMatthew Ahrens * The blocks in the deadlist can not be born after 405619b94df9SMatthew Ahrens * ds_prev_snap_txg, so get the whole deadlist space, 405719b94df9SMatthew Ahrens * which is more efficient (especially for old-format 405819b94df9SMatthew Ahrens * deadlists). Unfortunately the deadlist code 405919b94df9SMatthew Ahrens * doesn't have enough information to make this 406019b94df9SMatthew Ahrens * optimization itself. 406119b94df9SMatthew Ahrens */ 406219b94df9SMatthew Ahrens dsl_deadlist_space(&snap->ds_deadlist, 406319b94df9SMatthew Ahrens &used, &comp, &uncomp); 406419b94df9SMatthew Ahrens } else { 406519b94df9SMatthew Ahrens dsl_deadlist_space_range(&snap->ds_deadlist, 4066c1379625SJustin T. Gibbs 0, dsl_dataset_phys(oldsnap)->ds_creation_txg, 406719b94df9SMatthew Ahrens &used, &comp, &uncomp); 406819b94df9SMatthew Ahrens } 406919b94df9SMatthew Ahrens *usedp += used; 407019b94df9SMatthew Ahrens *compp += comp; 407119b94df9SMatthew Ahrens *uncompp += uncomp; 407219b94df9SMatthew Ahrens 407319b94df9SMatthew Ahrens /* 407419b94df9SMatthew Ahrens * If we get to the beginning of the chain of snapshots 407519b94df9SMatthew Ahrens * (ds_prev_snap_obj == 0) before oldsnap, then oldsnap 407619b94df9SMatthew Ahrens * was not a snapshot of/before new. 407719b94df9SMatthew Ahrens */ 4078c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 4079ad135b5dSChristopher Siden if (snap != new) 4080ad135b5dSChristopher Siden dsl_dataset_rele(snap, FTAG); 408119b94df9SMatthew Ahrens if (snapobj == 0) { 4082be6fd75aSMatthew Ahrens err = SET_ERROR(EINVAL); 408319b94df9SMatthew Ahrens break; 408419b94df9SMatthew Ahrens } 408519b94df9SMatthew Ahrens 408619b94df9SMatthew Ahrens } 408719b94df9SMatthew Ahrens return (err); 408819b94df9SMatthew Ahrens } 408919b94df9SMatthew Ahrens 409019b94df9SMatthew Ahrens /* 409119b94df9SMatthew Ahrens * Return (in *usedp) the amount of space that will be reclaimed if firstsnap, 409219b94df9SMatthew Ahrens * lastsnap, and all snapshots in between are deleted. 409319b94df9SMatthew Ahrens * 409419b94df9SMatthew Ahrens * blocks that would be freed [---------------------------] 409519b94df9SMatthew Ahrens * snapshots ---O-------O--------O-------O--------O 409619b94df9SMatthew Ahrens * firstsnap lastsnap 409719b94df9SMatthew Ahrens * 409819b94df9SMatthew Ahrens * This is the set of blocks that were born after the snap before firstsnap, 409919b94df9SMatthew Ahrens * (birth > firstsnap->prev_snap_txg) and died before the snap after the 410019b94df9SMatthew Ahrens * last snap (ie, is on lastsnap->ds_next->ds_deadlist or an earlier deadlist). 410119b94df9SMatthew Ahrens * We calculate this by iterating over the relevant deadlists (from the snap 410219b94df9SMatthew Ahrens * after lastsnap, backward to the snap after firstsnap), summing up the 410319b94df9SMatthew Ahrens * space on the deadlist that was born after the snap before firstsnap. 410419b94df9SMatthew Ahrens */ 410519b94df9SMatthew Ahrens int 410619b94df9SMatthew Ahrens dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, 410719b94df9SMatthew Ahrens dsl_dataset_t *lastsnap, 410819b94df9SMatthew Ahrens uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 410919b94df9SMatthew Ahrens { 411019b94df9SMatthew Ahrens int err = 0; 411119b94df9SMatthew Ahrens uint64_t snapobj; 411219b94df9SMatthew Ahrens dsl_pool_t *dp = firstsnap->ds_dir->dd_pool; 411319b94df9SMatthew Ahrens 4114bc9014e6SJustin Gibbs ASSERT(firstsnap->ds_is_snapshot); 4115bc9014e6SJustin Gibbs ASSERT(lastsnap->ds_is_snapshot); 411619b94df9SMatthew Ahrens 411719b94df9SMatthew Ahrens /* 411819b94df9SMatthew Ahrens * Check that the snapshots are in the same dsl_dir, and firstsnap 411919b94df9SMatthew Ahrens * is before lastsnap. 412019b94df9SMatthew Ahrens */ 412119b94df9SMatthew Ahrens if (firstsnap->ds_dir != lastsnap->ds_dir || 4122c1379625SJustin T. Gibbs dsl_dataset_phys(firstsnap)->ds_creation_txg > 4123c1379625SJustin T. Gibbs dsl_dataset_phys(lastsnap)->ds_creation_txg) 4124be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 412519b94df9SMatthew Ahrens 412619b94df9SMatthew Ahrens *usedp = *compp = *uncompp = 0; 412719b94df9SMatthew Ahrens 4128c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(lastsnap)->ds_next_snap_obj; 412919b94df9SMatthew Ahrens while (snapobj != firstsnap->ds_object) { 413019b94df9SMatthew Ahrens dsl_dataset_t *ds; 413119b94df9SMatthew Ahrens uint64_t used, comp, uncomp; 413219b94df9SMatthew Ahrens 413319b94df9SMatthew Ahrens err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &ds); 413419b94df9SMatthew Ahrens if (err != 0) 413519b94df9SMatthew Ahrens break; 413619b94df9SMatthew Ahrens 413719b94df9SMatthew Ahrens dsl_deadlist_space_range(&ds->ds_deadlist, 4138c1379625SJustin T. Gibbs dsl_dataset_phys(firstsnap)->ds_prev_snap_txg, UINT64_MAX, 413919b94df9SMatthew Ahrens &used, &comp, &uncomp); 414019b94df9SMatthew Ahrens *usedp += used; 414119b94df9SMatthew Ahrens *compp += comp; 414219b94df9SMatthew Ahrens *uncompp += uncomp; 414319b94df9SMatthew Ahrens 4144c1379625SJustin T. Gibbs snapobj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 414519b94df9SMatthew Ahrens ASSERT3U(snapobj, !=, 0); 414619b94df9SMatthew Ahrens dsl_dataset_rele(ds, FTAG); 414719b94df9SMatthew Ahrens } 414819b94df9SMatthew Ahrens return (err); 414919b94df9SMatthew Ahrens } 41503b2aab18SMatthew Ahrens 41513b2aab18SMatthew Ahrens /* 41523b2aab18SMatthew Ahrens * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. 41533b2aab18SMatthew Ahrens * For example, they could both be snapshots of the same filesystem, and 41543b2aab18SMatthew Ahrens * 'earlier' is before 'later'. Or 'earlier' could be the origin of 41553b2aab18SMatthew Ahrens * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's 41563b2aab18SMatthew Ahrens * filesystem. Or 'earlier' could be the origin's origin. 415778f17100SMatthew Ahrens * 415878f17100SMatthew Ahrens * If non-zero, earlier_txg is used instead of earlier's ds_creation_txg. 41593b2aab18SMatthew Ahrens */ 41603b2aab18SMatthew Ahrens boolean_t 416178f17100SMatthew Ahrens dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, 41629a686fbcSPaul Dagnelie uint64_t earlier_txg) 41633b2aab18SMatthew Ahrens { 41643b2aab18SMatthew Ahrens dsl_pool_t *dp = later->ds_dir->dd_pool; 41653b2aab18SMatthew Ahrens int error; 41663b2aab18SMatthew Ahrens boolean_t ret; 41673b2aab18SMatthew Ahrens 41683b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp)); 4169bc9014e6SJustin Gibbs ASSERT(earlier->ds_is_snapshot || earlier_txg != 0); 417078f17100SMatthew Ahrens 417178f17100SMatthew Ahrens if (earlier_txg == 0) 4172c1379625SJustin T. Gibbs earlier_txg = dsl_dataset_phys(earlier)->ds_creation_txg; 41733b2aab18SMatthew Ahrens 4174bc9014e6SJustin Gibbs if (later->ds_is_snapshot && 4175c1379625SJustin T. Gibbs earlier_txg >= dsl_dataset_phys(later)->ds_creation_txg) 41763b2aab18SMatthew Ahrens return (B_FALSE); 41773b2aab18SMatthew Ahrens 41783b2aab18SMatthew Ahrens if (later->ds_dir == earlier->ds_dir) 41793b2aab18SMatthew Ahrens return (B_TRUE); 41803b2aab18SMatthew Ahrens if (!dsl_dir_is_clone(later->ds_dir)) 41813b2aab18SMatthew Ahrens return (B_FALSE); 41823b2aab18SMatthew Ahrens 4183c1379625SJustin T. Gibbs if (dsl_dir_phys(later->ds_dir)->dd_origin_obj == earlier->ds_object) 41843b2aab18SMatthew Ahrens return (B_TRUE); 41853b2aab18SMatthew Ahrens dsl_dataset_t *origin; 41863b2aab18SMatthew Ahrens error = dsl_dataset_hold_obj(dp, 4187c1379625SJustin T. Gibbs dsl_dir_phys(later->ds_dir)->dd_origin_obj, FTAG, &origin); 41883b2aab18SMatthew Ahrens if (error != 0) 41893b2aab18SMatthew Ahrens return (B_FALSE); 419078f17100SMatthew Ahrens ret = dsl_dataset_is_before(origin, earlier, earlier_txg); 41913b2aab18SMatthew Ahrens dsl_dataset_rele(origin, FTAG); 41923b2aab18SMatthew Ahrens return (ret); 41933b2aab18SMatthew Ahrens } 41942acef22dSMatthew Ahrens 41952acef22dSMatthew Ahrens void 41962acef22dSMatthew Ahrens dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) 41972acef22dSMatthew Ahrens { 41982acef22dSMatthew Ahrens objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; 41992acef22dSMatthew Ahrens dmu_object_zapify(mos, ds->ds_object, DMU_OT_DSL_DATASET, tx); 42002acef22dSMatthew Ahrens } 42019c3fd121SMatthew Ahrens 42029c3fd121SMatthew Ahrens boolean_t 42039c3fd121SMatthew Ahrens dsl_dataset_is_zapified(dsl_dataset_t *ds) 42049c3fd121SMatthew Ahrens { 42059c3fd121SMatthew Ahrens dmu_object_info_t doi; 42069c3fd121SMatthew Ahrens 42079c3fd121SMatthew Ahrens dmu_object_info_from_db(ds->ds_dbuf, &doi); 42089c3fd121SMatthew Ahrens return (doi.doi_type == DMU_OTN_ZAP_METADATA); 42099c3fd121SMatthew Ahrens } 42109c3fd121SMatthew Ahrens 42119c3fd121SMatthew Ahrens boolean_t 42129c3fd121SMatthew Ahrens dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds) 42139c3fd121SMatthew Ahrens { 42149c3fd121SMatthew Ahrens return (dsl_dataset_is_zapified(ds) && 42159c3fd121SMatthew Ahrens zap_contains(ds->ds_dir->dd_pool->dp_meta_objset, 42169c3fd121SMatthew Ahrens ds->ds_object, DS_FIELD_RESUME_TOGUID) == 0); 42179c3fd121SMatthew Ahrens } 42185cabbc6bSPrashanth Sreenivasa 42195cabbc6bSPrashanth Sreenivasa uint64_t 42205cabbc6bSPrashanth Sreenivasa dsl_dataset_get_remap_deadlist_object(dsl_dataset_t *ds) 42215cabbc6bSPrashanth Sreenivasa { 42225cabbc6bSPrashanth Sreenivasa uint64_t remap_deadlist_obj; 42235cabbc6bSPrashanth Sreenivasa int err; 42245cabbc6bSPrashanth Sreenivasa 42255cabbc6bSPrashanth Sreenivasa if (!dsl_dataset_is_zapified(ds)) 42265cabbc6bSPrashanth Sreenivasa return (0); 42275cabbc6bSPrashanth Sreenivasa 42285cabbc6bSPrashanth Sreenivasa err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset, ds->ds_object, 42295cabbc6bSPrashanth Sreenivasa DS_FIELD_REMAP_DEADLIST, sizeof (remap_deadlist_obj), 1, 42305cabbc6bSPrashanth Sreenivasa &remap_deadlist_obj); 42315cabbc6bSPrashanth Sreenivasa 42325cabbc6bSPrashanth Sreenivasa if (err != 0) { 42335cabbc6bSPrashanth Sreenivasa VERIFY3S(err, ==, ENOENT); 42345cabbc6bSPrashanth Sreenivasa return (0); 42355cabbc6bSPrashanth Sreenivasa } 42365cabbc6bSPrashanth Sreenivasa 42375cabbc6bSPrashanth Sreenivasa ASSERT(remap_deadlist_obj != 0); 42385cabbc6bSPrashanth Sreenivasa return (remap_deadlist_obj); 42395cabbc6bSPrashanth Sreenivasa } 42405cabbc6bSPrashanth Sreenivasa 42415cabbc6bSPrashanth Sreenivasa boolean_t 42425cabbc6bSPrashanth Sreenivasa dsl_dataset_remap_deadlist_exists(dsl_dataset_t *ds) 42435cabbc6bSPrashanth Sreenivasa { 42445cabbc6bSPrashanth Sreenivasa EQUIV(dsl_deadlist_is_open(&ds->ds_remap_deadlist), 42455cabbc6bSPrashanth Sreenivasa dsl_dataset_get_remap_deadlist_object(ds) != 0); 42465cabbc6bSPrashanth Sreenivasa return (dsl_deadlist_is_open(&ds->ds_remap_deadlist)); 42475cabbc6bSPrashanth Sreenivasa } 42485cabbc6bSPrashanth Sreenivasa 42495cabbc6bSPrashanth Sreenivasa static void 42505cabbc6bSPrashanth Sreenivasa dsl_dataset_set_remap_deadlist_object(dsl_dataset_t *ds, uint64_t obj, 42515cabbc6bSPrashanth Sreenivasa dmu_tx_t *tx) 42525cabbc6bSPrashanth Sreenivasa { 42535cabbc6bSPrashanth Sreenivasa ASSERT(obj != 0); 42545cabbc6bSPrashanth Sreenivasa dsl_dataset_zapify(ds, tx); 42555cabbc6bSPrashanth Sreenivasa VERIFY0(zap_add(ds->ds_dir->dd_pool->dp_meta_objset, ds->ds_object, 42565cabbc6bSPrashanth Sreenivasa DS_FIELD_REMAP_DEADLIST, sizeof (obj), 1, &obj, tx)); 42575cabbc6bSPrashanth Sreenivasa } 42585cabbc6bSPrashanth Sreenivasa 42595cabbc6bSPrashanth Sreenivasa static void 42605cabbc6bSPrashanth Sreenivasa dsl_dataset_unset_remap_deadlist_object(dsl_dataset_t *ds, dmu_tx_t *tx) 42615cabbc6bSPrashanth Sreenivasa { 42625cabbc6bSPrashanth Sreenivasa VERIFY0(zap_remove(ds->ds_dir->dd_pool->dp_meta_objset, 42635cabbc6bSPrashanth Sreenivasa ds->ds_object, DS_FIELD_REMAP_DEADLIST, tx)); 42645cabbc6bSPrashanth Sreenivasa } 42655cabbc6bSPrashanth Sreenivasa 42665cabbc6bSPrashanth Sreenivasa void 42675cabbc6bSPrashanth Sreenivasa dsl_dataset_destroy_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx) 42685cabbc6bSPrashanth Sreenivasa { 42695cabbc6bSPrashanth Sreenivasa uint64_t remap_deadlist_object; 42705cabbc6bSPrashanth Sreenivasa spa_t *spa = ds->ds_dir->dd_pool->dp_spa; 42715cabbc6bSPrashanth Sreenivasa 42725cabbc6bSPrashanth Sreenivasa ASSERT(dmu_tx_is_syncing(tx)); 42735cabbc6bSPrashanth Sreenivasa ASSERT(dsl_dataset_remap_deadlist_exists(ds)); 42745cabbc6bSPrashanth Sreenivasa 42755cabbc6bSPrashanth Sreenivasa remap_deadlist_object = ds->ds_remap_deadlist.dl_object; 42765cabbc6bSPrashanth Sreenivasa dsl_deadlist_close(&ds->ds_remap_deadlist); 42775cabbc6bSPrashanth Sreenivasa dsl_deadlist_free(spa_meta_objset(spa), remap_deadlist_object, tx); 42785cabbc6bSPrashanth Sreenivasa dsl_dataset_unset_remap_deadlist_object(ds, tx); 42795cabbc6bSPrashanth Sreenivasa spa_feature_decr(spa, SPA_FEATURE_OBSOLETE_COUNTS, tx); 42805cabbc6bSPrashanth Sreenivasa } 42815cabbc6bSPrashanth Sreenivasa 42825cabbc6bSPrashanth Sreenivasa void 42835cabbc6bSPrashanth Sreenivasa dsl_dataset_create_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx) 42845cabbc6bSPrashanth Sreenivasa { 42855cabbc6bSPrashanth Sreenivasa uint64_t remap_deadlist_obj; 42865cabbc6bSPrashanth Sreenivasa spa_t *spa = ds->ds_dir->dd_pool->dp_spa; 42875cabbc6bSPrashanth Sreenivasa 42885cabbc6bSPrashanth Sreenivasa ASSERT(dmu_tx_is_syncing(tx)); 42895cabbc6bSPrashanth Sreenivasa ASSERT(MUTEX_HELD(&ds->ds_remap_deadlist_lock)); 42905cabbc6bSPrashanth Sreenivasa /* 42915cabbc6bSPrashanth Sreenivasa * Currently we only create remap deadlists when there are indirect 42925cabbc6bSPrashanth Sreenivasa * vdevs with referenced mappings. 42935cabbc6bSPrashanth Sreenivasa */ 42945cabbc6bSPrashanth Sreenivasa ASSERT(spa_feature_is_active(spa, SPA_FEATURE_DEVICE_REMOVAL)); 42955cabbc6bSPrashanth Sreenivasa 42965cabbc6bSPrashanth Sreenivasa remap_deadlist_obj = dsl_deadlist_clone( 42975cabbc6bSPrashanth Sreenivasa &ds->ds_deadlist, UINT64_MAX, 42985cabbc6bSPrashanth Sreenivasa dsl_dataset_phys(ds)->ds_prev_snap_obj, tx); 42995cabbc6bSPrashanth Sreenivasa dsl_dataset_set_remap_deadlist_object(ds, 43005cabbc6bSPrashanth Sreenivasa remap_deadlist_obj, tx); 43015cabbc6bSPrashanth Sreenivasa dsl_deadlist_open(&ds->ds_remap_deadlist, spa_meta_objset(spa), 43025cabbc6bSPrashanth Sreenivasa remap_deadlist_obj); 43035cabbc6bSPrashanth Sreenivasa spa_feature_incr(spa, SPA_FEATURE_OBSOLETE_COUNTS, tx); 43045cabbc6bSPrashanth Sreenivasa } 4305