1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 223f9d6ad7SLin Ling * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23*ad135b5dSChristopher Siden * Copyright (c) 2012 by Delphix. All rights reserved. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #include <sys/dsl_pool.h> 27fa9e4066Sahrens #include <sys/dsl_dataset.h> 283f9d6ad7SLin Ling #include <sys/dsl_prop.h> 29fa9e4066Sahrens #include <sys/dsl_dir.h> 301d452cf5Sahrens #include <sys/dsl_synctask.h> 313f9d6ad7SLin Ling #include <sys/dsl_scan.h> 323f9d6ad7SLin Ling #include <sys/dnode.h> 33fa9e4066Sahrens #include <sys/dmu_tx.h> 34fa9e4066Sahrens #include <sys/dmu_objset.h> 35fa9e4066Sahrens #include <sys/arc.h> 36fa9e4066Sahrens #include <sys/zap.h> 37c717a561Smaybee #include <sys/zio.h> 38fa9e4066Sahrens #include <sys/zfs_context.h> 39fa9e4066Sahrens #include <sys/fs/zfs.h> 40088f3894Sahrens #include <sys/zfs_znode.h> 41088f3894Sahrens #include <sys/spa_impl.h> 42cde58dbcSMatthew Ahrens #include <sys/dsl_deadlist.h> 43*ad135b5dSChristopher Siden #include <sys/bptree.h> 44*ad135b5dSChristopher Siden #include <sys/zfeature.h> 45fa9e4066Sahrens 461ab7f2deSmaybee int zfs_no_write_throttle = 0; 4705715f94SMark Maybee int zfs_write_limit_shift = 3; /* 1/8th of physical memory */ 4844ecc532SGeorge Wilson int zfs_txg_synctime_ms = 1000; /* target millisecs to sync a txg */ 4905715f94SMark Maybee 5005715f94SMark Maybee uint64_t zfs_write_limit_min = 32 << 20; /* min write limit is 32MB */ 5105715f94SMark Maybee uint64_t zfs_write_limit_max = 0; /* max data payload per txg */ 5205715f94SMark Maybee uint64_t zfs_write_limit_inflated = 0; 531ab7f2deSmaybee uint64_t zfs_write_limit_override = 0; 541ab7f2deSmaybee 5505715f94SMark Maybee kmutex_t zfs_write_limit_lock; 5605715f94SMark Maybee 5705715f94SMark Maybee static pgcnt_t old_physmem = 0; 58088f3894Sahrens 593f9d6ad7SLin Ling int 60088f3894Sahrens dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **ddp) 61fa9e4066Sahrens { 62fa9e4066Sahrens uint64_t obj; 63fa9e4066Sahrens int err; 64fa9e4066Sahrens 65fa9e4066Sahrens err = zap_lookup(dp->dp_meta_objset, 66fa9e4066Sahrens dp->dp_root_dir->dd_phys->dd_child_dir_zapobj, 67088f3894Sahrens name, sizeof (obj), 1, &obj); 68ea8dc4b6Seschrock if (err) 69ea8dc4b6Seschrock return (err); 70fa9e4066Sahrens 71088f3894Sahrens return (dsl_dir_open_obj(dp, obj, name, dp, ddp)); 72fa9e4066Sahrens } 73fa9e4066Sahrens 74fa9e4066Sahrens static dsl_pool_t * 75fa9e4066Sahrens dsl_pool_open_impl(spa_t *spa, uint64_t txg) 76fa9e4066Sahrens { 77fa9e4066Sahrens dsl_pool_t *dp; 78fa9e4066Sahrens blkptr_t *bp = spa_get_rootblkptr(spa); 79fa9e4066Sahrens 80fa9e4066Sahrens dp = kmem_zalloc(sizeof (dsl_pool_t), KM_SLEEP); 81fa9e4066Sahrens dp->dp_spa = spa; 82fa9e4066Sahrens dp->dp_meta_rootbp = *bp; 835ad82045Snd rw_init(&dp->dp_config_rwlock, NULL, RW_DEFAULT, NULL); 841ab7f2deSmaybee dp->dp_write_limit = zfs_write_limit_min; 85fa9e4066Sahrens txg_init(dp, txg); 86fa9e4066Sahrens 87fa9e4066Sahrens txg_list_create(&dp->dp_dirty_datasets, 88fa9e4066Sahrens offsetof(dsl_dataset_t, ds_dirty_link)); 89fa9e4066Sahrens txg_list_create(&dp->dp_dirty_dirs, 90fa9e4066Sahrens offsetof(dsl_dir_t, dd_dirty_link)); 911d452cf5Sahrens txg_list_create(&dp->dp_sync_tasks, 921d452cf5Sahrens offsetof(dsl_sync_task_group_t, dstg_node)); 933cb34c60Sahrens list_create(&dp->dp_synced_datasets, sizeof (dsl_dataset_t), 94fa9e4066Sahrens offsetof(dsl_dataset_t, ds_synced_link)); 95fa9e4066Sahrens 961ab7f2deSmaybee mutex_init(&dp->dp_lock, NULL, MUTEX_DEFAULT, NULL); 971ab7f2deSmaybee 989d3574bfSNeil Perrin dp->dp_vnrele_taskq = taskq_create("zfs_vn_rele_taskq", 1, minclsyspri, 999d3574bfSNeil Perrin 1, 4, 0); 1009d3574bfSNeil Perrin 101fa9e4066Sahrens return (dp); 102fa9e4066Sahrens } 103fa9e4066Sahrens 104ea8dc4b6Seschrock int 105*ad135b5dSChristopher Siden dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp) 106fa9e4066Sahrens { 107fa9e4066Sahrens int err; 108fa9e4066Sahrens dsl_pool_t *dp = dsl_pool_open_impl(spa, txg); 109*ad135b5dSChristopher Siden 110*ad135b5dSChristopher Siden err = dmu_objset_open_impl(spa, NULL, &dp->dp_meta_rootbp, 111*ad135b5dSChristopher Siden &dp->dp_meta_objset); 112*ad135b5dSChristopher Siden if (err != 0) 113*ad135b5dSChristopher Siden dsl_pool_close(dp); 114*ad135b5dSChristopher Siden else 115*ad135b5dSChristopher Siden *dpp = dp; 116*ad135b5dSChristopher Siden 117*ad135b5dSChristopher Siden return (err); 118*ad135b5dSChristopher Siden } 119*ad135b5dSChristopher Siden 120*ad135b5dSChristopher Siden int 121*ad135b5dSChristopher Siden dsl_pool_open(dsl_pool_t *dp) 122*ad135b5dSChristopher Siden { 123*ad135b5dSChristopher Siden int err; 124088f3894Sahrens dsl_dir_t *dd; 125088f3894Sahrens dsl_dataset_t *ds; 126cde58dbcSMatthew Ahrens uint64_t obj; 127fa9e4066Sahrens 128*ad135b5dSChristopher Siden ASSERT(!dmu_objset_is_dirty_anywhere(dp->dp_meta_objset)); 129ea8dc4b6Seschrock 130*ad135b5dSChristopher Siden rw_enter(&dp->dp_config_rwlock, RW_WRITER); 131fa9e4066Sahrens err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 132fa9e4066Sahrens DMU_POOL_ROOT_DATASET, sizeof (uint64_t), 1, 133fa9e4066Sahrens &dp->dp_root_dir_obj); 134ea8dc4b6Seschrock if (err) 135ea8dc4b6Seschrock goto out; 136ea8dc4b6Seschrock 137ea8dc4b6Seschrock err = dsl_dir_open_obj(dp, dp->dp_root_dir_obj, 138ea8dc4b6Seschrock NULL, dp, &dp->dp_root_dir); 139ea8dc4b6Seschrock if (err) 140ea8dc4b6Seschrock goto out; 141fa9e4066Sahrens 142088f3894Sahrens err = dsl_pool_open_special_dir(dp, MOS_DIR_NAME, &dp->dp_mos_dir); 143ea8dc4b6Seschrock if (err) 144ea8dc4b6Seschrock goto out; 145ea8dc4b6Seschrock 146*ad135b5dSChristopher Siden if (spa_version(dp->dp_spa) >= SPA_VERSION_ORIGIN) { 147088f3894Sahrens err = dsl_pool_open_special_dir(dp, ORIGIN_DIR_NAME, &dd); 148088f3894Sahrens if (err) 149088f3894Sahrens goto out; 150088f3894Sahrens err = dsl_dataset_hold_obj(dp, dd->dd_phys->dd_head_dataset_obj, 151088f3894Sahrens FTAG, &ds); 1528f63aa46SLin Ling if (err == 0) { 1538f63aa46SLin Ling err = dsl_dataset_hold_obj(dp, 1548f63aa46SLin Ling ds->ds_phys->ds_prev_snap_obj, dp, 1558f63aa46SLin Ling &dp->dp_origin_snap); 1568f63aa46SLin Ling dsl_dataset_rele(ds, FTAG); 1578f63aa46SLin Ling } 1588f63aa46SLin Ling dsl_dir_close(dd, dp); 159088f3894Sahrens if (err) 160088f3894Sahrens goto out; 161088f3894Sahrens } 162088f3894Sahrens 163*ad135b5dSChristopher Siden if (spa_version(dp->dp_spa) >= SPA_VERSION_DEADLISTS) { 164cde58dbcSMatthew Ahrens err = dsl_pool_open_special_dir(dp, FREE_DIR_NAME, 165cde58dbcSMatthew Ahrens &dp->dp_free_dir); 166cde58dbcSMatthew Ahrens if (err) 167cde58dbcSMatthew Ahrens goto out; 168cde58dbcSMatthew Ahrens 169cde58dbcSMatthew Ahrens err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 170cde58dbcSMatthew Ahrens DMU_POOL_FREE_BPOBJ, sizeof (uint64_t), 1, &obj); 171cde58dbcSMatthew Ahrens if (err) 172cde58dbcSMatthew Ahrens goto out; 173cde58dbcSMatthew Ahrens VERIFY3U(0, ==, bpobj_open(&dp->dp_free_bpobj, 174cde58dbcSMatthew Ahrens dp->dp_meta_objset, obj)); 175cde58dbcSMatthew Ahrens } 176cde58dbcSMatthew Ahrens 177*ad135b5dSChristopher Siden if (spa_feature_is_active(dp->dp_spa, 178*ad135b5dSChristopher Siden &spa_feature_table[SPA_FEATURE_ASYNC_DESTROY])) { 179*ad135b5dSChristopher Siden err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 180*ad135b5dSChristopher Siden DMU_POOL_BPTREE_OBJ, sizeof (uint64_t), 1, 181*ad135b5dSChristopher Siden &dp->dp_bptree_obj); 182*ad135b5dSChristopher Siden if (err != 0) 183*ad135b5dSChristopher Siden goto out; 184*ad135b5dSChristopher Siden } 185*ad135b5dSChristopher Siden 186ca45db41SChris Kirby err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 187ca45db41SChris Kirby DMU_POOL_TMP_USERREFS, sizeof (uint64_t), 1, 188ca45db41SChris Kirby &dp->dp_tmp_userrefs_obj); 189ca45db41SChris Kirby if (err == ENOENT) 190ca45db41SChris Kirby err = 0; 191ca45db41SChris Kirby if (err) 192ca45db41SChris Kirby goto out; 193ca45db41SChris Kirby 194*ad135b5dSChristopher Siden err = dsl_scan_init(dp, dp->dp_tx.tx_open_txg); 195088f3894Sahrens 196ea8dc4b6Seschrock out: 197fa9e4066Sahrens rw_exit(&dp->dp_config_rwlock); 198ea8dc4b6Seschrock return (err); 199fa9e4066Sahrens } 200fa9e4066Sahrens 201fa9e4066Sahrens void 202fa9e4066Sahrens dsl_pool_close(dsl_pool_t *dp) 203fa9e4066Sahrens { 204088f3894Sahrens /* drop our references from dsl_pool_open() */ 205088f3894Sahrens 206088f3894Sahrens /* 207088f3894Sahrens * Since we held the origin_snap from "syncing" context (which 208088f3894Sahrens * includes pool-opening context), it actually only got a "ref" 209088f3894Sahrens * and not a hold, so just drop that here. 210088f3894Sahrens */ 211088f3894Sahrens if (dp->dp_origin_snap) 212088f3894Sahrens dsl_dataset_drop_ref(dp->dp_origin_snap, dp); 213ea8dc4b6Seschrock if (dp->dp_mos_dir) 214ea8dc4b6Seschrock dsl_dir_close(dp->dp_mos_dir, dp); 215cde58dbcSMatthew Ahrens if (dp->dp_free_dir) 216cde58dbcSMatthew Ahrens dsl_dir_close(dp->dp_free_dir, dp); 217ea8dc4b6Seschrock if (dp->dp_root_dir) 218ea8dc4b6Seschrock dsl_dir_close(dp->dp_root_dir, dp); 219fa9e4066Sahrens 220cde58dbcSMatthew Ahrens bpobj_close(&dp->dp_free_bpobj); 221cde58dbcSMatthew Ahrens 222fa9e4066Sahrens /* undo the dmu_objset_open_impl(mos) from dsl_pool_open() */ 223ea8dc4b6Seschrock if (dp->dp_meta_objset) 224503ad85cSMatthew Ahrens dmu_objset_evict(dp->dp_meta_objset); 225fa9e4066Sahrens 226fa9e4066Sahrens txg_list_destroy(&dp->dp_dirty_datasets); 22754a91118SChris Kirby txg_list_destroy(&dp->dp_sync_tasks); 228fa9e4066Sahrens txg_list_destroy(&dp->dp_dirty_dirs); 2293cb34c60Sahrens list_destroy(&dp->dp_synced_datasets); 230fa9e4066Sahrens 231874395d5Smaybee arc_flush(dp->dp_spa); 232fa9e4066Sahrens txg_fini(dp); 2333f9d6ad7SLin Ling dsl_scan_fini(dp); 2345ad82045Snd rw_destroy(&dp->dp_config_rwlock); 2351ab7f2deSmaybee mutex_destroy(&dp->dp_lock); 2369d3574bfSNeil Perrin taskq_destroy(dp->dp_vnrele_taskq); 23788b7b0f2SMatthew Ahrens if (dp->dp_blkstats) 23888b7b0f2SMatthew Ahrens kmem_free(dp->dp_blkstats, sizeof (zfs_all_blkstats_t)); 239fa9e4066Sahrens kmem_free(dp, sizeof (dsl_pool_t)); 240fa9e4066Sahrens } 241fa9e4066Sahrens 242fa9e4066Sahrens dsl_pool_t * 2430a48a24eStimh dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg) 244fa9e4066Sahrens { 245fa9e4066Sahrens int err; 246fa9e4066Sahrens dsl_pool_t *dp = dsl_pool_open_impl(spa, txg); 247fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create_assigned(dp, txg); 248503ad85cSMatthew Ahrens objset_t *os; 249088f3894Sahrens dsl_dataset_t *ds; 250cde58dbcSMatthew Ahrens uint64_t obj; 251088f3894Sahrens 252088f3894Sahrens /* create and open the MOS (meta-objset) */ 253503ad85cSMatthew Ahrens dp->dp_meta_objset = dmu_objset_create_impl(spa, 254503ad85cSMatthew Ahrens NULL, &dp->dp_meta_rootbp, DMU_OST_META, tx); 255fa9e4066Sahrens 256fa9e4066Sahrens /* create the pool directory */ 257fa9e4066Sahrens err = zap_create_claim(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 258fa9e4066Sahrens DMU_OT_OBJECT_DIRECTORY, DMU_OT_NONE, 0, tx); 259fa9e4066Sahrens ASSERT3U(err, ==, 0); 260fa9e4066Sahrens 2613f9d6ad7SLin Ling /* Initialize scan structures */ 2623f9d6ad7SLin Ling VERIFY3U(0, ==, dsl_scan_init(dp, txg)); 2633f9d6ad7SLin Ling 264fa9e4066Sahrens /* create and open the root dir */ 265088f3894Sahrens dp->dp_root_dir_obj = dsl_dir_create_sync(dp, NULL, NULL, tx); 266ea8dc4b6Seschrock VERIFY(0 == dsl_dir_open_obj(dp, dp->dp_root_dir_obj, 267ea8dc4b6Seschrock NULL, dp, &dp->dp_root_dir)); 268fa9e4066Sahrens 269fa9e4066Sahrens /* create and open the meta-objset dir */ 270088f3894Sahrens (void) dsl_dir_create_sync(dp, dp->dp_root_dir, MOS_DIR_NAME, tx); 271088f3894Sahrens VERIFY(0 == dsl_pool_open_special_dir(dp, 272088f3894Sahrens MOS_DIR_NAME, &dp->dp_mos_dir)); 273088f3894Sahrens 274cde58dbcSMatthew Ahrens if (spa_version(spa) >= SPA_VERSION_DEADLISTS) { 275cde58dbcSMatthew Ahrens /* create and open the free dir */ 276cde58dbcSMatthew Ahrens (void) dsl_dir_create_sync(dp, dp->dp_root_dir, 277cde58dbcSMatthew Ahrens FREE_DIR_NAME, tx); 278cde58dbcSMatthew Ahrens VERIFY(0 == dsl_pool_open_special_dir(dp, 279cde58dbcSMatthew Ahrens FREE_DIR_NAME, &dp->dp_free_dir)); 280cde58dbcSMatthew Ahrens 281cde58dbcSMatthew Ahrens /* create and open the free_bplist */ 282cde58dbcSMatthew Ahrens obj = bpobj_alloc(dp->dp_meta_objset, SPA_MAXBLOCKSIZE, tx); 283cde58dbcSMatthew Ahrens VERIFY(zap_add(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 284cde58dbcSMatthew Ahrens DMU_POOL_FREE_BPOBJ, sizeof (uint64_t), 1, &obj, tx) == 0); 285cde58dbcSMatthew Ahrens VERIFY3U(0, ==, bpobj_open(&dp->dp_free_bpobj, 286cde58dbcSMatthew Ahrens dp->dp_meta_objset, obj)); 287cde58dbcSMatthew Ahrens } 288cde58dbcSMatthew Ahrens 289088f3894Sahrens if (spa_version(spa) >= SPA_VERSION_DSL_SCRUB) 290088f3894Sahrens dsl_pool_create_origin(dp, tx); 291088f3894Sahrens 292088f3894Sahrens /* create the root dataset */ 293cde58dbcSMatthew Ahrens obj = dsl_dataset_create_sync_dd(dp->dp_root_dir, NULL, 0, tx); 294088f3894Sahrens 295088f3894Sahrens /* create the root objset */ 296cde58dbcSMatthew Ahrens VERIFY(0 == dsl_dataset_hold_obj(dp, obj, FTAG, &ds)); 297503ad85cSMatthew Ahrens os = dmu_objset_create_impl(dp->dp_spa, ds, 298088f3894Sahrens dsl_dataset_get_blkptr(ds), DMU_OST_ZFS, tx); 299088f3894Sahrens #ifdef _KERNEL 300503ad85cSMatthew Ahrens zfs_create_fs(os, kcred, zplprops, tx); 301088f3894Sahrens #endif 302088f3894Sahrens dsl_dataset_rele(ds, FTAG); 303fa9e4066Sahrens 304fa9e4066Sahrens dmu_tx_commit(tx); 305fa9e4066Sahrens 306fa9e4066Sahrens return (dp); 307fa9e4066Sahrens } 308fa9e4066Sahrens 309cde58dbcSMatthew Ahrens static int 310cde58dbcSMatthew Ahrens deadlist_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 311cde58dbcSMatthew Ahrens { 312cde58dbcSMatthew Ahrens dsl_deadlist_t *dl = arg; 31319b94df9SMatthew Ahrens dsl_pool_t *dp = dmu_objset_pool(dl->dl_os); 31419b94df9SMatthew Ahrens rw_enter(&dp->dp_config_rwlock, RW_READER); 315cde58dbcSMatthew Ahrens dsl_deadlist_insert(dl, bp, tx); 31619b94df9SMatthew Ahrens rw_exit(&dp->dp_config_rwlock); 317cde58dbcSMatthew Ahrens return (0); 318cde58dbcSMatthew Ahrens } 319cde58dbcSMatthew Ahrens 320fa9e4066Sahrens void 321fa9e4066Sahrens dsl_pool_sync(dsl_pool_t *dp, uint64_t txg) 322fa9e4066Sahrens { 323c717a561Smaybee zio_t *zio; 324fa9e4066Sahrens dmu_tx_t *tx; 325c717a561Smaybee dsl_dir_t *dd; 326c717a561Smaybee dsl_dataset_t *ds; 327c717a561Smaybee dsl_sync_task_group_t *dstg; 328503ad85cSMatthew Ahrens objset_t *mos = dp->dp_meta_objset; 32905715f94SMark Maybee hrtime_t start, write_time; 33005715f94SMark Maybee uint64_t data_written; 331c717a561Smaybee int err; 332fa9e4066Sahrens 3333f9d6ad7SLin Ling /* 3343f9d6ad7SLin Ling * We need to copy dp_space_towrite() before doing 3353f9d6ad7SLin Ling * dsl_sync_task_group_sync(), because 3363f9d6ad7SLin Ling * dsl_dataset_snapshot_reserve_space() will increase 3373f9d6ad7SLin Ling * dp_space_towrite but not actually write anything. 3383f9d6ad7SLin Ling */ 3393f9d6ad7SLin Ling data_written = dp->dp_space_towrite[txg & TXG_MASK]; 3403f9d6ad7SLin Ling 341fa9e4066Sahrens tx = dmu_tx_create_assigned(dp, txg); 342fa9e4066Sahrens 34305715f94SMark Maybee dp->dp_read_overhead = 0; 3440fd90d51SMark Maybee start = gethrtime(); 34514843421SMatthew Ahrens 346c717a561Smaybee zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 347c717a561Smaybee while (ds = txg_list_remove(&dp->dp_dirty_datasets, txg)) { 34814843421SMatthew Ahrens /* 34914843421SMatthew Ahrens * We must not sync any non-MOS datasets twice, because 35014843421SMatthew Ahrens * we may have taken a snapshot of them. However, we 35114843421SMatthew Ahrens * may sync newly-created datasets on pass 2. 35214843421SMatthew Ahrens */ 35314843421SMatthew Ahrens ASSERT(!list_link_active(&ds->ds_synced_link)); 35414843421SMatthew Ahrens list_insert_tail(&dp->dp_synced_datasets, ds); 355c717a561Smaybee dsl_dataset_sync(ds, zio, tx); 356c717a561Smaybee } 35705715f94SMark Maybee DTRACE_PROBE(pool_sync__1setup); 358c717a561Smaybee err = zio_wait(zio); 35914843421SMatthew Ahrens 36005715f94SMark Maybee write_time = gethrtime() - start; 361c717a561Smaybee ASSERT(err == 0); 36205715f94SMark Maybee DTRACE_PROBE(pool_sync__2rootzio); 363c717a561Smaybee 36414843421SMatthew Ahrens for (ds = list_head(&dp->dp_synced_datasets); ds; 36514843421SMatthew Ahrens ds = list_next(&dp->dp_synced_datasets, ds)) 3660a586ceaSMark Shellenbaum dmu_objset_do_userquota_updates(ds->ds_objset, tx); 36714843421SMatthew Ahrens 36814843421SMatthew Ahrens /* 36914843421SMatthew Ahrens * Sync the datasets again to push out the changes due to 3703f9d6ad7SLin Ling * userspace updates. This must be done before we process the 37114843421SMatthew Ahrens * sync tasks, because that could cause a snapshot of a dataset 37214843421SMatthew Ahrens * whose ds_bp will be rewritten when we do this 2nd sync. 37314843421SMatthew Ahrens */ 37414843421SMatthew Ahrens zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 37514843421SMatthew Ahrens while (ds = txg_list_remove(&dp->dp_dirty_datasets, txg)) { 37614843421SMatthew Ahrens ASSERT(list_link_active(&ds->ds_synced_link)); 37714843421SMatthew Ahrens dmu_buf_rele(ds->ds_dbuf, ds); 37814843421SMatthew Ahrens dsl_dataset_sync(ds, zio, tx); 37914843421SMatthew Ahrens } 38014843421SMatthew Ahrens err = zio_wait(zio); 38114843421SMatthew Ahrens 382b24ab676SJeff Bonwick /* 383cde58dbcSMatthew Ahrens * Move dead blocks from the pending deadlist to the on-disk 384cde58dbcSMatthew Ahrens * deadlist. 385b24ab676SJeff Bonwick */ 386b24ab676SJeff Bonwick for (ds = list_head(&dp->dp_synced_datasets); ds; 387cde58dbcSMatthew Ahrens ds = list_next(&dp->dp_synced_datasets, ds)) { 388cde58dbcSMatthew Ahrens bplist_iterate(&ds->ds_pending_deadlist, 389cde58dbcSMatthew Ahrens deadlist_enqueue_cb, &ds->ds_deadlist, tx); 390cde58dbcSMatthew Ahrens } 391b24ab676SJeff Bonwick 39214843421SMatthew Ahrens while (dstg = txg_list_remove(&dp->dp_sync_tasks, txg)) { 39314843421SMatthew Ahrens /* 39414843421SMatthew Ahrens * No more sync tasks should have been added while we 39514843421SMatthew Ahrens * were syncing. 39614843421SMatthew Ahrens */ 39714843421SMatthew Ahrens ASSERT(spa_sync_pass(dp->dp_spa) == 1); 398c717a561Smaybee dsl_sync_task_group_sync(dstg, tx); 39914843421SMatthew Ahrens } 40005715f94SMark Maybee DTRACE_PROBE(pool_sync__3task); 40105715f94SMark Maybee 40205715f94SMark Maybee start = gethrtime(); 403c717a561Smaybee while (dd = txg_list_remove(&dp->dp_dirty_dirs, txg)) 404c717a561Smaybee dsl_dir_sync(dd, tx); 40505715f94SMark Maybee write_time += gethrtime() - start; 406fa9e4066Sahrens 40705715f94SMark Maybee start = gethrtime(); 408503ad85cSMatthew Ahrens if (list_head(&mos->os_dirty_dnodes[txg & TXG_MASK]) != NULL || 409503ad85cSMatthew Ahrens list_head(&mos->os_free_dnodes[txg & TXG_MASK]) != NULL) { 410c717a561Smaybee zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); 411503ad85cSMatthew Ahrens dmu_objset_sync(mos, zio, tx); 412c717a561Smaybee err = zio_wait(zio); 413c717a561Smaybee ASSERT(err == 0); 414fa9e4066Sahrens dprintf_bp(&dp->dp_meta_rootbp, "meta objset rootbp is %s", ""); 415fa9e4066Sahrens spa_set_rootblkptr(dp->dp_spa, &dp->dp_meta_rootbp); 416fa9e4066Sahrens } 41705715f94SMark Maybee write_time += gethrtime() - start; 41805715f94SMark Maybee DTRACE_PROBE2(pool_sync__4io, hrtime_t, write_time, 41905715f94SMark Maybee hrtime_t, dp->dp_read_overhead); 42005715f94SMark Maybee write_time -= dp->dp_read_overhead; 421fa9e4066Sahrens 422fa9e4066Sahrens dmu_tx_commit(tx); 42305715f94SMark Maybee 42405715f94SMark Maybee dp->dp_space_towrite[txg & TXG_MASK] = 0; 42505715f94SMark Maybee ASSERT(dp->dp_tempreserved[txg & TXG_MASK] == 0); 42605715f94SMark Maybee 42705715f94SMark Maybee /* 42805715f94SMark Maybee * If the write limit max has not been explicitly set, set it 42905715f94SMark Maybee * to a fraction of available physical memory (default 1/8th). 43005715f94SMark Maybee * Note that we must inflate the limit because the spa 43105715f94SMark Maybee * inflates write sizes to account for data replication. 43205715f94SMark Maybee * Check this each sync phase to catch changing memory size. 43305715f94SMark Maybee */ 43405715f94SMark Maybee if (physmem != old_physmem && zfs_write_limit_shift) { 43505715f94SMark Maybee mutex_enter(&zfs_write_limit_lock); 43605715f94SMark Maybee old_physmem = physmem; 43705715f94SMark Maybee zfs_write_limit_max = ptob(physmem) >> zfs_write_limit_shift; 43805715f94SMark Maybee zfs_write_limit_inflated = MAX(zfs_write_limit_min, 43905715f94SMark Maybee spa_get_asize(dp->dp_spa, zfs_write_limit_max)); 44005715f94SMark Maybee mutex_exit(&zfs_write_limit_lock); 44105715f94SMark Maybee } 44205715f94SMark Maybee 44305715f94SMark Maybee /* 44405715f94SMark Maybee * Attempt to keep the sync time consistent by adjusting the 44505715f94SMark Maybee * amount of write traffic allowed into each transaction group. 44605715f94SMark Maybee * Weight the throughput calculation towards the current value: 44705715f94SMark Maybee * thru = 3/4 old_thru + 1/4 new_thru 448fb5dd802SLin Ling * 449fb5dd802SLin Ling * Note: write_time is in nanosecs, so write_time/MICROSEC 450fb5dd802SLin Ling * yields millisecs 45105715f94SMark Maybee */ 45205715f94SMark Maybee ASSERT(zfs_write_limit_min > 0); 453fb5dd802SLin Ling if (data_written > zfs_write_limit_min / 8 && write_time > MICROSEC) { 454fb5dd802SLin Ling uint64_t throughput = data_written / (write_time / MICROSEC); 455fb5dd802SLin Ling 45605715f94SMark Maybee if (dp->dp_throughput) 45705715f94SMark Maybee dp->dp_throughput = throughput / 4 + 45805715f94SMark Maybee 3 * dp->dp_throughput / 4; 45905715f94SMark Maybee else 46005715f94SMark Maybee dp->dp_throughput = throughput; 46105715f94SMark Maybee dp->dp_write_limit = MIN(zfs_write_limit_inflated, 46205715f94SMark Maybee MAX(zfs_write_limit_min, 463fb5dd802SLin Ling dp->dp_throughput * zfs_txg_synctime_ms)); 46405715f94SMark Maybee } 465fa9e4066Sahrens } 466fa9e4066Sahrens 467fa9e4066Sahrens void 468b24ab676SJeff Bonwick dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg) 469fa9e4066Sahrens { 470fa9e4066Sahrens dsl_dataset_t *ds; 471b24ab676SJeff Bonwick objset_t *os; 472fa9e4066Sahrens 4733cb34c60Sahrens while (ds = list_head(&dp->dp_synced_datasets)) { 4743cb34c60Sahrens list_remove(&dp->dp_synced_datasets, ds); 475b24ab676SJeff Bonwick os = ds->ds_objset; 4765002558fSNeil Perrin zil_clean(os->os_zil, txg); 477b24ab676SJeff Bonwick ASSERT(!dmu_objset_is_dirty(os, txg)); 478af2c4821Smaybee dmu_buf_rele(ds->ds_dbuf, ds); 479fa9e4066Sahrens } 480b24ab676SJeff Bonwick ASSERT(!dmu_objset_is_dirty(dp->dp_meta_objset, txg)); 481fa9e4066Sahrens } 482fa9e4066Sahrens 483c717a561Smaybee /* 484c717a561Smaybee * TRUE if the current thread is the tx_sync_thread or if we 485c717a561Smaybee * are being called from SPA context during pool initialization. 486c717a561Smaybee */ 487fa9e4066Sahrens int 488fa9e4066Sahrens dsl_pool_sync_context(dsl_pool_t *dp) 489fa9e4066Sahrens { 490fa9e4066Sahrens return (curthread == dp->dp_tx.tx_sync_thread || 491*ad135b5dSChristopher Siden spa_is_initializing(dp->dp_spa)); 492fa9e4066Sahrens } 493fa9e4066Sahrens 494fa9e4066Sahrens uint64_t 495fa9e4066Sahrens dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree) 496fa9e4066Sahrens { 497fa9e4066Sahrens uint64_t space, resv; 498fa9e4066Sahrens 499fa9e4066Sahrens /* 50044cd46caSbillm * Reserve about 1.6% (1/64), or at least 32MB, for allocation 501fa9e4066Sahrens * efficiency. 502fa9e4066Sahrens * XXX The intent log is not accounted for, so it must fit 503fa9e4066Sahrens * within this slop. 504fa9e4066Sahrens * 505fa9e4066Sahrens * If we're trying to assess whether it's OK to do a free, 506fa9e4066Sahrens * cut the reservation in half to allow forward progress 507fa9e4066Sahrens * (e.g. make it possible to rm(1) files from a full pool). 508fa9e4066Sahrens */ 509485bbbf5SGeorge Wilson space = spa_get_dspace(dp->dp_spa); 51044cd46caSbillm resv = MAX(space >> 6, SPA_MINDEVSIZE >> 1); 511fa9e4066Sahrens if (netfree) 512fa9e4066Sahrens resv >>= 1; 513fa9e4066Sahrens 514fa9e4066Sahrens return (space - resv); 515fa9e4066Sahrens } 5161ab7f2deSmaybee 5171ab7f2deSmaybee int 5181ab7f2deSmaybee dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx) 5191ab7f2deSmaybee { 5201ab7f2deSmaybee uint64_t reserved = 0; 5211ab7f2deSmaybee uint64_t write_limit = (zfs_write_limit_override ? 5221ab7f2deSmaybee zfs_write_limit_override : dp->dp_write_limit); 5231ab7f2deSmaybee 5241ab7f2deSmaybee if (zfs_no_write_throttle) { 525c5904d13Seschrock atomic_add_64(&dp->dp_tempreserved[tx->tx_txg & TXG_MASK], 526c5904d13Seschrock space); 5271ab7f2deSmaybee return (0); 5281ab7f2deSmaybee } 5291ab7f2deSmaybee 5301ab7f2deSmaybee /* 5311ab7f2deSmaybee * Check to see if we have exceeded the maximum allowed IO for 5321ab7f2deSmaybee * this transaction group. We can do this without locks since 5331ab7f2deSmaybee * a little slop here is ok. Note that we do the reserved check 5341ab7f2deSmaybee * with only half the requested reserve: this is because the 5351ab7f2deSmaybee * reserve requests are worst-case, and we really don't want to 5361ab7f2deSmaybee * throttle based off of worst-case estimates. 5371ab7f2deSmaybee */ 5381ab7f2deSmaybee if (write_limit > 0) { 5391ab7f2deSmaybee reserved = dp->dp_space_towrite[tx->tx_txg & TXG_MASK] 5401ab7f2deSmaybee + dp->dp_tempreserved[tx->tx_txg & TXG_MASK] / 2; 5411ab7f2deSmaybee 5421ab7f2deSmaybee if (reserved && reserved > write_limit) 5431ab7f2deSmaybee return (ERESTART); 5441ab7f2deSmaybee } 5451ab7f2deSmaybee 5461ab7f2deSmaybee atomic_add_64(&dp->dp_tempreserved[tx->tx_txg & TXG_MASK], space); 5471ab7f2deSmaybee 5481ab7f2deSmaybee /* 5491ab7f2deSmaybee * If this transaction group is over 7/8ths capacity, delay 5501ab7f2deSmaybee * the caller 1 clock tick. This will slow down the "fill" 5511ab7f2deSmaybee * rate until the sync process can catch up with us. 5521ab7f2deSmaybee */ 553e8397a2bSgw if (reserved && reserved > (write_limit - (write_limit >> 3))) 5541ab7f2deSmaybee txg_delay(dp, tx->tx_txg, 1); 5551ab7f2deSmaybee 5561ab7f2deSmaybee return (0); 5571ab7f2deSmaybee } 5581ab7f2deSmaybee 5591ab7f2deSmaybee void 5601ab7f2deSmaybee dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx) 5611ab7f2deSmaybee { 5621ab7f2deSmaybee ASSERT(dp->dp_tempreserved[tx->tx_txg & TXG_MASK] >= space); 5631ab7f2deSmaybee atomic_add_64(&dp->dp_tempreserved[tx->tx_txg & TXG_MASK], -space); 5641ab7f2deSmaybee } 5651ab7f2deSmaybee 5661ab7f2deSmaybee void 5671ab7f2deSmaybee dsl_pool_memory_pressure(dsl_pool_t *dp) 5681ab7f2deSmaybee { 5691ab7f2deSmaybee uint64_t space_inuse = 0; 5701ab7f2deSmaybee int i; 5711ab7f2deSmaybee 5721ab7f2deSmaybee if (dp->dp_write_limit == zfs_write_limit_min) 5731ab7f2deSmaybee return; 5741ab7f2deSmaybee 5751ab7f2deSmaybee for (i = 0; i < TXG_SIZE; i++) { 5761ab7f2deSmaybee space_inuse += dp->dp_space_towrite[i]; 5771ab7f2deSmaybee space_inuse += dp->dp_tempreserved[i]; 5781ab7f2deSmaybee } 5791ab7f2deSmaybee dp->dp_write_limit = MAX(zfs_write_limit_min, 5801ab7f2deSmaybee MIN(dp->dp_write_limit, space_inuse / 4)); 5811ab7f2deSmaybee } 5821ab7f2deSmaybee 5831ab7f2deSmaybee void 5841ab7f2deSmaybee dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx) 5851ab7f2deSmaybee { 5861ab7f2deSmaybee if (space > 0) { 5871ab7f2deSmaybee mutex_enter(&dp->dp_lock); 5881ab7f2deSmaybee dp->dp_space_towrite[tx->tx_txg & TXG_MASK] += space; 5891ab7f2deSmaybee mutex_exit(&dp->dp_lock); 5901ab7f2deSmaybee } 5911ab7f2deSmaybee } 592088f3894Sahrens 593088f3894Sahrens /* ARGSUSED */ 594088f3894Sahrens static int 595088f3894Sahrens upgrade_clones_cb(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg) 596088f3894Sahrens { 597088f3894Sahrens dmu_tx_t *tx = arg; 598088f3894Sahrens dsl_dataset_t *ds, *prev = NULL; 599088f3894Sahrens int err; 600088f3894Sahrens dsl_pool_t *dp = spa_get_dsl(spa); 601088f3894Sahrens 602088f3894Sahrens err = dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds); 603088f3894Sahrens if (err) 604088f3894Sahrens return (err); 605088f3894Sahrens 606088f3894Sahrens while (ds->ds_phys->ds_prev_snap_obj != 0) { 607088f3894Sahrens err = dsl_dataset_hold_obj(dp, ds->ds_phys->ds_prev_snap_obj, 608088f3894Sahrens FTAG, &prev); 609088f3894Sahrens if (err) { 610088f3894Sahrens dsl_dataset_rele(ds, FTAG); 611088f3894Sahrens return (err); 612088f3894Sahrens } 613088f3894Sahrens 614088f3894Sahrens if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) 615088f3894Sahrens break; 616088f3894Sahrens dsl_dataset_rele(ds, FTAG); 617088f3894Sahrens ds = prev; 618088f3894Sahrens prev = NULL; 619088f3894Sahrens } 620088f3894Sahrens 621088f3894Sahrens if (prev == NULL) { 622088f3894Sahrens prev = dp->dp_origin_snap; 623088f3894Sahrens 624088f3894Sahrens /* 625088f3894Sahrens * The $ORIGIN can't have any data, or the accounting 626088f3894Sahrens * will be wrong. 627088f3894Sahrens */ 628088f3894Sahrens ASSERT(prev->ds_phys->ds_bp.blk_birth == 0); 629088f3894Sahrens 630088f3894Sahrens /* The origin doesn't get attached to itself */ 631088f3894Sahrens if (ds->ds_object == prev->ds_object) { 632088f3894Sahrens dsl_dataset_rele(ds, FTAG); 633088f3894Sahrens return (0); 634088f3894Sahrens } 635088f3894Sahrens 636088f3894Sahrens dmu_buf_will_dirty(ds->ds_dbuf, tx); 637088f3894Sahrens ds->ds_phys->ds_prev_snap_obj = prev->ds_object; 638088f3894Sahrens ds->ds_phys->ds_prev_snap_txg = prev->ds_phys->ds_creation_txg; 639088f3894Sahrens 640088f3894Sahrens dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); 641088f3894Sahrens ds->ds_dir->dd_phys->dd_origin_obj = prev->ds_object; 642088f3894Sahrens 643088f3894Sahrens dmu_buf_will_dirty(prev->ds_dbuf, tx); 644088f3894Sahrens prev->ds_phys->ds_num_children++; 645088f3894Sahrens 646088f3894Sahrens if (ds->ds_phys->ds_next_snap_obj == 0) { 647088f3894Sahrens ASSERT(ds->ds_prev == NULL); 648088f3894Sahrens VERIFY(0 == dsl_dataset_hold_obj(dp, 649088f3894Sahrens ds->ds_phys->ds_prev_snap_obj, ds, &ds->ds_prev)); 650088f3894Sahrens } 651088f3894Sahrens } 652088f3894Sahrens 653088f3894Sahrens ASSERT(ds->ds_dir->dd_phys->dd_origin_obj == prev->ds_object); 654088f3894Sahrens ASSERT(ds->ds_phys->ds_prev_snap_obj == prev->ds_object); 655088f3894Sahrens 656088f3894Sahrens if (prev->ds_phys->ds_next_clones_obj == 0) { 657c33e334fSMatthew Ahrens dmu_buf_will_dirty(prev->ds_dbuf, tx); 658088f3894Sahrens prev->ds_phys->ds_next_clones_obj = 659088f3894Sahrens zap_create(dp->dp_meta_objset, 660088f3894Sahrens DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); 661088f3894Sahrens } 662088f3894Sahrens VERIFY(0 == zap_add_int(dp->dp_meta_objset, 663088f3894Sahrens prev->ds_phys->ds_next_clones_obj, ds->ds_object, tx)); 664088f3894Sahrens 665088f3894Sahrens dsl_dataset_rele(ds, FTAG); 666088f3894Sahrens if (prev != dp->dp_origin_snap) 667088f3894Sahrens dsl_dataset_rele(prev, FTAG); 668088f3894Sahrens return (0); 669088f3894Sahrens } 670088f3894Sahrens 671088f3894Sahrens void 672088f3894Sahrens dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx) 673088f3894Sahrens { 674088f3894Sahrens ASSERT(dmu_tx_is_syncing(tx)); 675088f3894Sahrens ASSERT(dp->dp_origin_snap != NULL); 676088f3894Sahrens 677c33e334fSMatthew Ahrens VERIFY3U(0, ==, dmu_objset_find_spa(dp->dp_spa, NULL, upgrade_clones_cb, 678c33e334fSMatthew Ahrens tx, DS_FIND_CHILDREN)); 679088f3894Sahrens } 680088f3894Sahrens 681cde58dbcSMatthew Ahrens /* ARGSUSED */ 682cde58dbcSMatthew Ahrens static int 683cde58dbcSMatthew Ahrens upgrade_dir_clones_cb(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg) 684cde58dbcSMatthew Ahrens { 685cde58dbcSMatthew Ahrens dmu_tx_t *tx = arg; 686cde58dbcSMatthew Ahrens dsl_dataset_t *ds; 687cde58dbcSMatthew Ahrens dsl_pool_t *dp = spa_get_dsl(spa); 688cde58dbcSMatthew Ahrens objset_t *mos = dp->dp_meta_objset; 689cde58dbcSMatthew Ahrens 690cde58dbcSMatthew Ahrens VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); 691cde58dbcSMatthew Ahrens 692cde58dbcSMatthew Ahrens if (ds->ds_dir->dd_phys->dd_origin_obj) { 693cde58dbcSMatthew Ahrens dsl_dataset_t *origin; 694cde58dbcSMatthew Ahrens 695cde58dbcSMatthew Ahrens VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, 696cde58dbcSMatthew Ahrens ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &origin)); 697cde58dbcSMatthew Ahrens 698cde58dbcSMatthew Ahrens if (origin->ds_dir->dd_phys->dd_clones == 0) { 699cde58dbcSMatthew Ahrens dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx); 700cde58dbcSMatthew Ahrens origin->ds_dir->dd_phys->dd_clones = zap_create(mos, 701cde58dbcSMatthew Ahrens DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx); 702cde58dbcSMatthew Ahrens } 703cde58dbcSMatthew Ahrens 704cde58dbcSMatthew Ahrens VERIFY3U(0, ==, zap_add_int(dp->dp_meta_objset, 705cde58dbcSMatthew Ahrens origin->ds_dir->dd_phys->dd_clones, dsobj, tx)); 706cde58dbcSMatthew Ahrens 707cde58dbcSMatthew Ahrens dsl_dataset_rele(origin, FTAG); 708cde58dbcSMatthew Ahrens } 709cde58dbcSMatthew Ahrens 710cde58dbcSMatthew Ahrens dsl_dataset_rele(ds, FTAG); 711cde58dbcSMatthew Ahrens return (0); 712cde58dbcSMatthew Ahrens } 713cde58dbcSMatthew Ahrens 714cde58dbcSMatthew Ahrens void 715cde58dbcSMatthew Ahrens dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx) 716cde58dbcSMatthew Ahrens { 717cde58dbcSMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 718cde58dbcSMatthew Ahrens uint64_t obj; 719cde58dbcSMatthew Ahrens 720cde58dbcSMatthew Ahrens (void) dsl_dir_create_sync(dp, dp->dp_root_dir, FREE_DIR_NAME, tx); 721cde58dbcSMatthew Ahrens VERIFY(0 == dsl_pool_open_special_dir(dp, 722cde58dbcSMatthew Ahrens FREE_DIR_NAME, &dp->dp_free_dir)); 723cde58dbcSMatthew Ahrens 724cde58dbcSMatthew Ahrens /* 725cde58dbcSMatthew Ahrens * We can't use bpobj_alloc(), because spa_version() still 726cde58dbcSMatthew Ahrens * returns the old version, and we need a new-version bpobj with 727cde58dbcSMatthew Ahrens * subobj support. So call dmu_object_alloc() directly. 728cde58dbcSMatthew Ahrens */ 729cde58dbcSMatthew Ahrens obj = dmu_object_alloc(dp->dp_meta_objset, DMU_OT_BPOBJ, 730cde58dbcSMatthew Ahrens SPA_MAXBLOCKSIZE, DMU_OT_BPOBJ_HDR, sizeof (bpobj_phys_t), tx); 731cde58dbcSMatthew Ahrens VERIFY3U(0, ==, zap_add(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 732cde58dbcSMatthew Ahrens DMU_POOL_FREE_BPOBJ, sizeof (uint64_t), 1, &obj, tx)); 733cde58dbcSMatthew Ahrens VERIFY3U(0, ==, bpobj_open(&dp->dp_free_bpobj, 734cde58dbcSMatthew Ahrens dp->dp_meta_objset, obj)); 735cde58dbcSMatthew Ahrens 736cde58dbcSMatthew Ahrens VERIFY3U(0, ==, dmu_objset_find_spa(dp->dp_spa, NULL, 737cde58dbcSMatthew Ahrens upgrade_dir_clones_cb, tx, DS_FIND_CHILDREN)); 738cde58dbcSMatthew Ahrens } 739cde58dbcSMatthew Ahrens 740088f3894Sahrens void 741088f3894Sahrens dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx) 742088f3894Sahrens { 743088f3894Sahrens uint64_t dsobj; 744088f3894Sahrens dsl_dataset_t *ds; 745088f3894Sahrens 746088f3894Sahrens ASSERT(dmu_tx_is_syncing(tx)); 747088f3894Sahrens ASSERT(dp->dp_origin_snap == NULL); 748088f3894Sahrens 749088f3894Sahrens /* create the origin dir, ds, & snap-ds */ 750088f3894Sahrens rw_enter(&dp->dp_config_rwlock, RW_WRITER); 751088f3894Sahrens dsobj = dsl_dataset_create_sync(dp->dp_root_dir, ORIGIN_DIR_NAME, 752088f3894Sahrens NULL, 0, kcred, tx); 753088f3894Sahrens VERIFY(0 == dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds)); 7543f9d6ad7SLin Ling dsl_dataset_snapshot_sync(ds, ORIGIN_DIR_NAME, tx); 755088f3894Sahrens VERIFY(0 == dsl_dataset_hold_obj(dp, ds->ds_phys->ds_prev_snap_obj, 756088f3894Sahrens dp, &dp->dp_origin_snap)); 757088f3894Sahrens dsl_dataset_rele(ds, FTAG); 758088f3894Sahrens rw_exit(&dp->dp_config_rwlock); 759088f3894Sahrens } 7609d3574bfSNeil Perrin 7619d3574bfSNeil Perrin taskq_t * 7629d3574bfSNeil Perrin dsl_pool_vnrele_taskq(dsl_pool_t *dp) 7639d3574bfSNeil Perrin { 7649d3574bfSNeil Perrin return (dp->dp_vnrele_taskq); 7659d3574bfSNeil Perrin } 766ca45db41SChris Kirby 767ca45db41SChris Kirby /* 768ca45db41SChris Kirby * Walk through the pool-wide zap object of temporary snapshot user holds 769ca45db41SChris Kirby * and release them. 770ca45db41SChris Kirby */ 771ca45db41SChris Kirby void 772ca45db41SChris Kirby dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp) 773ca45db41SChris Kirby { 774ca45db41SChris Kirby zap_attribute_t za; 775ca45db41SChris Kirby zap_cursor_t zc; 776ca45db41SChris Kirby objset_t *mos = dp->dp_meta_objset; 777ca45db41SChris Kirby uint64_t zapobj = dp->dp_tmp_userrefs_obj; 778ca45db41SChris Kirby 779ca45db41SChris Kirby if (zapobj == 0) 780ca45db41SChris Kirby return; 781ca45db41SChris Kirby ASSERT(spa_version(dp->dp_spa) >= SPA_VERSION_USERREFS); 782ca45db41SChris Kirby 783ca45db41SChris Kirby for (zap_cursor_init(&zc, mos, zapobj); 784ca45db41SChris Kirby zap_cursor_retrieve(&zc, &za) == 0; 785ca45db41SChris Kirby zap_cursor_advance(&zc)) { 786ca45db41SChris Kirby char *htag; 787ca45db41SChris Kirby uint64_t dsobj; 788ca45db41SChris Kirby 789ca45db41SChris Kirby htag = strchr(za.za_name, '-'); 790ca45db41SChris Kirby *htag = '\0'; 791ca45db41SChris Kirby ++htag; 792ca45db41SChris Kirby dsobj = strtonum(za.za_name, NULL); 793a7f53a56SChris Kirby (void) dsl_dataset_user_release_tmp(dp, dsobj, htag, B_FALSE); 794ca45db41SChris Kirby } 795ca45db41SChris Kirby zap_cursor_fini(&zc); 796ca45db41SChris Kirby } 797ca45db41SChris Kirby 798ca45db41SChris Kirby /* 799ca45db41SChris Kirby * Create the pool-wide zap object for storing temporary snapshot holds. 800ca45db41SChris Kirby */ 801ca45db41SChris Kirby void 802ca45db41SChris Kirby dsl_pool_user_hold_create_obj(dsl_pool_t *dp, dmu_tx_t *tx) 803ca45db41SChris Kirby { 804ca45db41SChris Kirby objset_t *mos = dp->dp_meta_objset; 805ca45db41SChris Kirby 806ca45db41SChris Kirby ASSERT(dp->dp_tmp_userrefs_obj == 0); 807ca45db41SChris Kirby ASSERT(dmu_tx_is_syncing(tx)); 808ca45db41SChris Kirby 809*ad135b5dSChristopher Siden dp->dp_tmp_userrefs_obj = zap_create_link(mos, DMU_OT_USERREFS, 810*ad135b5dSChristopher Siden DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_TMP_USERREFS, tx); 811ca45db41SChris Kirby } 812ca45db41SChris Kirby 813ca45db41SChris Kirby static int 814ca45db41SChris Kirby dsl_pool_user_hold_rele_impl(dsl_pool_t *dp, uint64_t dsobj, 81515508ac0SChris Kirby const char *tag, uint64_t *now, dmu_tx_t *tx, boolean_t holding) 816ca45db41SChris Kirby { 817ca45db41SChris Kirby objset_t *mos = dp->dp_meta_objset; 818ca45db41SChris Kirby uint64_t zapobj = dp->dp_tmp_userrefs_obj; 819ca45db41SChris Kirby char *name; 820ca45db41SChris Kirby int error; 821ca45db41SChris Kirby 822ca45db41SChris Kirby ASSERT(spa_version(dp->dp_spa) >= SPA_VERSION_USERREFS); 823ca45db41SChris Kirby ASSERT(dmu_tx_is_syncing(tx)); 824ca45db41SChris Kirby 825ca45db41SChris Kirby /* 826ca45db41SChris Kirby * If the pool was created prior to SPA_VERSION_USERREFS, the 827ca45db41SChris Kirby * zap object for temporary holds might not exist yet. 828ca45db41SChris Kirby */ 829ca45db41SChris Kirby if (zapobj == 0) { 830ca45db41SChris Kirby if (holding) { 831ca45db41SChris Kirby dsl_pool_user_hold_create_obj(dp, tx); 832ca45db41SChris Kirby zapobj = dp->dp_tmp_userrefs_obj; 833ca45db41SChris Kirby } else { 834ca45db41SChris Kirby return (ENOENT); 835ca45db41SChris Kirby } 836ca45db41SChris Kirby } 837ca45db41SChris Kirby 838ca45db41SChris Kirby name = kmem_asprintf("%llx-%s", (u_longlong_t)dsobj, tag); 839ca45db41SChris Kirby if (holding) 84015508ac0SChris Kirby error = zap_add(mos, zapobj, name, 8, 1, now, tx); 841ca45db41SChris Kirby else 842ca45db41SChris Kirby error = zap_remove(mos, zapobj, name, tx); 843ca45db41SChris Kirby strfree(name); 844ca45db41SChris Kirby 845ca45db41SChris Kirby return (error); 846ca45db41SChris Kirby } 847ca45db41SChris Kirby 848ca45db41SChris Kirby /* 849ca45db41SChris Kirby * Add a temporary hold for the given dataset object and tag. 850ca45db41SChris Kirby */ 851ca45db41SChris Kirby int 852ca45db41SChris Kirby dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj, const char *tag, 85315508ac0SChris Kirby uint64_t *now, dmu_tx_t *tx) 854ca45db41SChris Kirby { 85515508ac0SChris Kirby return (dsl_pool_user_hold_rele_impl(dp, dsobj, tag, now, tx, B_TRUE)); 856ca45db41SChris Kirby } 857ca45db41SChris Kirby 858ca45db41SChris Kirby /* 859ca45db41SChris Kirby * Release a temporary hold for the given dataset object and tag. 860ca45db41SChris Kirby */ 861ca45db41SChris Kirby int 862ca45db41SChris Kirby dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj, const char *tag, 863ca45db41SChris Kirby dmu_tx_t *tx) 864ca45db41SChris Kirby { 865ca45db41SChris Kirby return (dsl_pool_user_hold_rele_impl(dp, dsobj, tag, NULL, 866ca45db41SChris Kirby tx, B_FALSE)); 867ca45db41SChris Kirby } 868