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 /* 2294d1a210STim Haley * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23fa9e4066Sahrens */ 24fa9e4066Sahrens 25fa9e4066Sahrens #include <sys/dmu.h> 26fa9e4066Sahrens #include <sys/dmu_impl.h> 27fa9e4066Sahrens #include <sys/dmu_tx.h> 28fa9e4066Sahrens #include <sys/dbuf.h> 29fa9e4066Sahrens #include <sys/dnode.h> 30fa9e4066Sahrens #include <sys/zfs_context.h> 31fa9e4066Sahrens #include <sys/dmu_objset.h> 32fa9e4066Sahrens #include <sys/dmu_traverse.h> 33fa9e4066Sahrens #include <sys/dsl_dataset.h> 34fa9e4066Sahrens #include <sys/dsl_dir.h> 35fa9e4066Sahrens #include <sys/dsl_pool.h> 361d452cf5Sahrens #include <sys/dsl_synctask.h> 37a2eea2e1Sahrens #include <sys/dsl_prop.h> 38fa9e4066Sahrens #include <sys/dmu_zfetch.h> 39fa9e4066Sahrens #include <sys/zfs_ioctl.h> 40fa9e4066Sahrens #include <sys/zap.h> 41ea8dc4b6Seschrock #include <sys/zio_checksum.h> 420a586ceaSMark Shellenbaum #include <sys/sa.h> 4344eda4d7Smaybee #ifdef _KERNEL 4444eda4d7Smaybee #include <sys/vmsystm.h> 450fab61baSJonathan W Adams #include <sys/zfs_znode.h> 4644eda4d7Smaybee #endif 47fa9e4066Sahrens 48fa9e4066Sahrens const dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES] = { 49fa9e4066Sahrens { byteswap_uint8_array, TRUE, "unallocated" }, 50fa9e4066Sahrens { zap_byteswap, TRUE, "object directory" }, 51fa9e4066Sahrens { byteswap_uint64_array, TRUE, "object array" }, 52fa9e4066Sahrens { byteswap_uint8_array, TRUE, "packed nvlist" }, 53fa9e4066Sahrens { byteswap_uint64_array, TRUE, "packed nvlist size" }, 54fa9e4066Sahrens { byteswap_uint64_array, TRUE, "bplist" }, 55fa9e4066Sahrens { byteswap_uint64_array, TRUE, "bplist header" }, 56fa9e4066Sahrens { byteswap_uint64_array, TRUE, "SPA space map header" }, 57fa9e4066Sahrens { byteswap_uint64_array, TRUE, "SPA space map" }, 58fa9e4066Sahrens { byteswap_uint64_array, TRUE, "ZIL intent log" }, 59fa9e4066Sahrens { dnode_buf_byteswap, TRUE, "DMU dnode" }, 60fa9e4066Sahrens { dmu_objset_byteswap, TRUE, "DMU objset" }, 61fa9e4066Sahrens { byteswap_uint64_array, TRUE, "DSL directory" }, 62fa9e4066Sahrens { zap_byteswap, TRUE, "DSL directory child map"}, 63fa9e4066Sahrens { zap_byteswap, TRUE, "DSL dataset snap map" }, 64fa9e4066Sahrens { zap_byteswap, TRUE, "DSL props" }, 65fa9e4066Sahrens { byteswap_uint64_array, TRUE, "DSL dataset" }, 66fa9e4066Sahrens { zfs_znode_byteswap, TRUE, "ZFS znode" }, 67da6c28aaSamw { zfs_oldacl_byteswap, TRUE, "ZFS V0 ACL" }, 68fa9e4066Sahrens { byteswap_uint8_array, FALSE, "ZFS plain file" }, 69fa9e4066Sahrens { zap_byteswap, TRUE, "ZFS directory" }, 70fa9e4066Sahrens { zap_byteswap, TRUE, "ZFS master node" }, 71fa9e4066Sahrens { zap_byteswap, TRUE, "ZFS delete queue" }, 72fa9e4066Sahrens { byteswap_uint8_array, FALSE, "zvol object" }, 73fa9e4066Sahrens { zap_byteswap, TRUE, "zvol prop" }, 74fa9e4066Sahrens { byteswap_uint8_array, FALSE, "other uint8[]" }, 75fa9e4066Sahrens { byteswap_uint64_array, FALSE, "other uint64[]" }, 76fa9e4066Sahrens { zap_byteswap, TRUE, "other ZAP" }, 77ea8dc4b6Seschrock { zap_byteswap, TRUE, "persistent error log" }, 7806eeb2adSek { byteswap_uint8_array, TRUE, "SPA history" }, 7906eeb2adSek { byteswap_uint64_array, TRUE, "SPA history offsets" }, 80ecd6cf80Smarks { zap_byteswap, TRUE, "Pool properties" }, 81da6c28aaSamw { zap_byteswap, TRUE, "DSL permissions" }, 82da6c28aaSamw { zfs_acl_byteswap, TRUE, "ZFS ACL" }, 83da6c28aaSamw { byteswap_uint8_array, TRUE, "ZFS SYSACL" }, 84da6c28aaSamw { byteswap_uint8_array, TRUE, "FUID table" }, 85add89791Smarks { byteswap_uint64_array, TRUE, "FUID table size" }, 86088f3894Sahrens { zap_byteswap, TRUE, "DSL dataset next clones"}, 87088f3894Sahrens { zap_byteswap, TRUE, "scrub work queue" }, 8814843421SMatthew Ahrens { zap_byteswap, TRUE, "ZFS user/group used" }, 8914843421SMatthew Ahrens { zap_byteswap, TRUE, "ZFS user/group quota" }, 90842727c2SChris Kirby { zap_byteswap, TRUE, "snapshot refcount tags"}, 91b24ab676SJeff Bonwick { zap_byteswap, TRUE, "DDT ZAP algorithm" }, 92b24ab676SJeff Bonwick { zap_byteswap, TRUE, "DDT statistics" }, 930a586ceaSMark Shellenbaum { byteswap_uint8_array, TRUE, "System attributes" }, 940a586ceaSMark Shellenbaum { zap_byteswap, TRUE, "SA master node" }, 950a586ceaSMark Shellenbaum { zap_byteswap, TRUE, "SA attr registration" }, 960a586ceaSMark Shellenbaum { zap_byteswap, TRUE, "SA attr layouts" }, }; 97fa9e4066Sahrens 98fa9e4066Sahrens int 99ea8dc4b6Seschrock dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset, 100ea8dc4b6Seschrock void *tag, dmu_buf_t **dbp) 101fa9e4066Sahrens { 102fa9e4066Sahrens dnode_t *dn; 103fa9e4066Sahrens uint64_t blkid; 104fa9e4066Sahrens dmu_buf_impl_t *db; 105ea8dc4b6Seschrock int err; 106fa9e4066Sahrens 107503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 108ea8dc4b6Seschrock if (err) 109ea8dc4b6Seschrock return (err); 110fa9e4066Sahrens blkid = dbuf_whichblock(dn, offset); 111fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 112ea8dc4b6Seschrock db = dbuf_hold(dn, blkid, tag); 113fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 114ea8dc4b6Seschrock if (db == NULL) { 115ea8dc4b6Seschrock err = EIO; 116ea8dc4b6Seschrock } else { 117ea8dc4b6Seschrock err = dbuf_read(db, NULL, DB_RF_CANFAIL); 118ea8dc4b6Seschrock if (err) { 119ea8dc4b6Seschrock dbuf_rele(db, tag); 120ea8dc4b6Seschrock db = NULL; 121ea8dc4b6Seschrock } 122ea8dc4b6Seschrock } 123fa9e4066Sahrens 124ea8dc4b6Seschrock dnode_rele(dn, FTAG); 125ea8dc4b6Seschrock *dbp = &db->db; 126ea8dc4b6Seschrock return (err); 127fa9e4066Sahrens } 128fa9e4066Sahrens 129fa9e4066Sahrens int 130fa9e4066Sahrens dmu_bonus_max(void) 131fa9e4066Sahrens { 132fa9e4066Sahrens return (DN_MAX_BONUSLEN); 133fa9e4066Sahrens } 134fa9e4066Sahrens 1351934e92fSmaybee int 1361934e92fSmaybee dmu_set_bonus(dmu_buf_t *db, int newsize, dmu_tx_t *tx) 1371934e92fSmaybee { 1381934e92fSmaybee dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 1391934e92fSmaybee 1401934e92fSmaybee if (dn->dn_bonus != (dmu_buf_impl_t *)db) 1411934e92fSmaybee return (EINVAL); 1421934e92fSmaybee if (newsize < 0 || newsize > db->db_size) 1431934e92fSmaybee return (EINVAL); 1441934e92fSmaybee dnode_setbonuslen(dn, newsize, tx); 1451934e92fSmaybee return (0); 1461934e92fSmaybee } 1471934e92fSmaybee 1480a586ceaSMark Shellenbaum int 1490a586ceaSMark Shellenbaum dmu_set_bonustype(dmu_buf_t *db, dmu_object_type_t type, dmu_tx_t *tx) 1500a586ceaSMark Shellenbaum { 1510a586ceaSMark Shellenbaum dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 1520a586ceaSMark Shellenbaum 1530a586ceaSMark Shellenbaum if (type > DMU_OT_NUMTYPES) 1540a586ceaSMark Shellenbaum return (EINVAL); 1550a586ceaSMark Shellenbaum 1560a586ceaSMark Shellenbaum if (dn->dn_bonus != (dmu_buf_impl_t *)db) 1570a586ceaSMark Shellenbaum return (EINVAL); 1580a586ceaSMark Shellenbaum 1590a586ceaSMark Shellenbaum dnode_setbonus_type(dn, type, tx); 1600a586ceaSMark Shellenbaum return (0); 1610a586ceaSMark Shellenbaum } 1620a586ceaSMark Shellenbaum 1630a586ceaSMark Shellenbaum int 1640a586ceaSMark Shellenbaum dmu_rm_spill(objset_t *os, uint64_t object, dmu_tx_t *tx) 1650a586ceaSMark Shellenbaum { 1660a586ceaSMark Shellenbaum dnode_t *dn; 1670a586ceaSMark Shellenbaum int error; 1680a586ceaSMark Shellenbaum 1690a586ceaSMark Shellenbaum error = dnode_hold(os, object, FTAG, &dn); 1700a586ceaSMark Shellenbaum dbuf_rm_spill(dn, tx); 171*06e0070dSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 172*06e0070dSMark Shellenbaum dnode_rm_spill(dn, tx); 173*06e0070dSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 1740a586ceaSMark Shellenbaum dnode_rele(dn, FTAG); 1750a586ceaSMark Shellenbaum return (error); 1760a586ceaSMark Shellenbaum } 1770a586ceaSMark Shellenbaum 178fa9e4066Sahrens /* 179ea8dc4b6Seschrock * returns ENOENT, EIO, or 0. 180fa9e4066Sahrens */ 181ea8dc4b6Seschrock int 182ea8dc4b6Seschrock dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **dbp) 183fa9e4066Sahrens { 184ea8dc4b6Seschrock dnode_t *dn; 185fa9e4066Sahrens dmu_buf_impl_t *db; 1861934e92fSmaybee int error; 187fa9e4066Sahrens 188503ad85cSMatthew Ahrens error = dnode_hold(os, object, FTAG, &dn); 1891934e92fSmaybee if (error) 1901934e92fSmaybee return (error); 191fa9e4066Sahrens 192ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_READER); 193ea8dc4b6Seschrock if (dn->dn_bonus == NULL) { 194fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 195ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 196ea8dc4b6Seschrock if (dn->dn_bonus == NULL) 1971934e92fSmaybee dbuf_create_bonus(dn); 198fa9e4066Sahrens } 199ea8dc4b6Seschrock db = dn->dn_bonus; 200ea8dc4b6Seschrock rw_exit(&dn->dn_struct_rwlock); 2011934e92fSmaybee 2021934e92fSmaybee /* as long as the bonus buf is held, the dnode will be held */ 2031934e92fSmaybee if (refcount_add(&db->db_holds, tag) == 1) 2041934e92fSmaybee VERIFY(dnode_add_ref(dn, db)); 2051934e92fSmaybee 206fa9e4066Sahrens dnode_rele(dn, FTAG); 207ea8dc4b6Seschrock 208ea8dc4b6Seschrock VERIFY(0 == dbuf_read(db, NULL, DB_RF_MUST_SUCCEED)); 209ea8dc4b6Seschrock 210ea8dc4b6Seschrock *dbp = &db->db; 211ea8dc4b6Seschrock return (0); 212fa9e4066Sahrens } 213fa9e4066Sahrens 2140a586ceaSMark Shellenbaum /* 2150a586ceaSMark Shellenbaum * returns ENOENT, EIO, or 0. 2160a586ceaSMark Shellenbaum * 2170a586ceaSMark Shellenbaum * This interface will allocate a blank spill dbuf when a spill blk 2180a586ceaSMark Shellenbaum * doesn't already exist on the dnode. 2190a586ceaSMark Shellenbaum * 2200a586ceaSMark Shellenbaum * if you only want to find an already existing spill db, then 2210a586ceaSMark Shellenbaum * dmu_spill_hold_existing() should be used. 2220a586ceaSMark Shellenbaum */ 2230a586ceaSMark Shellenbaum int 2240a586ceaSMark Shellenbaum dmu_spill_hold_by_dnode(dnode_t *dn, uint32_t flags, void *tag, dmu_buf_t **dbp) 2250a586ceaSMark Shellenbaum { 2260a586ceaSMark Shellenbaum dmu_buf_impl_t *db = NULL; 2270a586ceaSMark Shellenbaum int err; 2280a586ceaSMark Shellenbaum 2290a586ceaSMark Shellenbaum if ((flags & DB_RF_HAVESTRUCT) == 0) 2300a586ceaSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_READER); 2310a586ceaSMark Shellenbaum 2320a586ceaSMark Shellenbaum db = dbuf_hold(dn, DMU_SPILL_BLKID, tag); 2330a586ceaSMark Shellenbaum 2340a586ceaSMark Shellenbaum if ((flags & DB_RF_HAVESTRUCT) == 0) 2350a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 2360a586ceaSMark Shellenbaum 2370a586ceaSMark Shellenbaum ASSERT(db != NULL); 2380a586ceaSMark Shellenbaum err = dbuf_read(db, NULL, DB_RF_MUST_SUCCEED | flags); 2390a586ceaSMark Shellenbaum *dbp = &db->db; 2400a586ceaSMark Shellenbaum return (err); 2410a586ceaSMark Shellenbaum } 2420a586ceaSMark Shellenbaum 2430a586ceaSMark Shellenbaum int 2440a586ceaSMark Shellenbaum dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) 2450a586ceaSMark Shellenbaum { 2460a586ceaSMark Shellenbaum dnode_t *dn = ((dmu_buf_impl_t *)bonus)->db_dnode; 2470a586ceaSMark Shellenbaum int err; 2480a586ceaSMark Shellenbaum 2490a586ceaSMark Shellenbaum if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_SA) 2500a586ceaSMark Shellenbaum return (EINVAL); 2510a586ceaSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_READER); 2520a586ceaSMark Shellenbaum 2530a586ceaSMark Shellenbaum if (!dn->dn_have_spill) { 2540a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 2550a586ceaSMark Shellenbaum return (ENOENT); 2560a586ceaSMark Shellenbaum } 2570a586ceaSMark Shellenbaum err = dmu_spill_hold_by_dnode(dn, DB_RF_HAVESTRUCT, tag, dbp); 2580a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 2590a586ceaSMark Shellenbaum return (err); 2600a586ceaSMark Shellenbaum } 2610a586ceaSMark Shellenbaum 2620a586ceaSMark Shellenbaum int 2630a586ceaSMark Shellenbaum dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) 2640a586ceaSMark Shellenbaum { 2650a586ceaSMark Shellenbaum return (dmu_spill_hold_by_dnode(((dmu_buf_impl_t *)bonus)->db_dnode, 2660a586ceaSMark Shellenbaum 0, tag, dbp)); 2670a586ceaSMark Shellenbaum } 2680a586ceaSMark Shellenbaum 26913506d1eSmaybee /* 27013506d1eSmaybee * Note: longer-term, we should modify all of the dmu_buf_*() interfaces 27113506d1eSmaybee * to take a held dnode rather than <os, object> -- the lookup is wasteful, 27213506d1eSmaybee * and can induce severe lock contention when writing to several files 27313506d1eSmaybee * whose dnodes are in the same block. 27413506d1eSmaybee */ 27513506d1eSmaybee static int 2767bfdf011SNeil Perrin dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset, uint64_t length, 2777bfdf011SNeil Perrin int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp, uint32_t flags) 278fa9e4066Sahrens { 27905715f94SMark Maybee dsl_pool_t *dp = NULL; 280fa9e4066Sahrens dmu_buf_t **dbp; 281fa9e4066Sahrens uint64_t blkid, nblks, i; 2827bfdf011SNeil Perrin uint32_t dbuf_flags; 283ea8dc4b6Seschrock int err; 284ea8dc4b6Seschrock zio_t *zio; 28505715f94SMark Maybee hrtime_t start; 286ea8dc4b6Seschrock 287ea8dc4b6Seschrock ASSERT(length <= DMU_MAX_ACCESS); 288fa9e4066Sahrens 289c87b8fc5SMark J Musante dbuf_flags = DB_RF_CANFAIL | DB_RF_NEVERWAIT | DB_RF_HAVESTRUCT; 2907bfdf011SNeil Perrin if (flags & DMU_READ_NO_PREFETCH || length > zfetch_array_rd_sz) 2917bfdf011SNeil Perrin dbuf_flags |= DB_RF_NOPREFETCH; 292ea8dc4b6Seschrock 293fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 294fa9e4066Sahrens if (dn->dn_datablkshift) { 295fa9e4066Sahrens int blkshift = dn->dn_datablkshift; 296fa9e4066Sahrens nblks = (P2ROUNDUP(offset+length, 1ULL<<blkshift) - 297b1b8ab34Slling P2ALIGN(offset, 1ULL<<blkshift)) >> blkshift; 298fa9e4066Sahrens } else { 2990125049cSahrens if (offset + length > dn->dn_datablksz) { 3000125049cSahrens zfs_panic_recover("zfs: accessing past end of object " 3010125049cSahrens "%llx/%llx (size=%u access=%llu+%llu)", 3020125049cSahrens (longlong_t)dn->dn_objset-> 3030125049cSahrens os_dsl_dataset->ds_object, 3040125049cSahrens (longlong_t)dn->dn_object, dn->dn_datablksz, 3050125049cSahrens (longlong_t)offset, (longlong_t)length); 306c87b8fc5SMark J Musante rw_exit(&dn->dn_struct_rwlock); 3070125049cSahrens return (EIO); 3080125049cSahrens } 309fa9e4066Sahrens nblks = 1; 310fa9e4066Sahrens } 311ea8dc4b6Seschrock dbp = kmem_zalloc(sizeof (dmu_buf_t *) * nblks, KM_SLEEP); 312fa9e4066Sahrens 31305715f94SMark Maybee if (dn->dn_objset->os_dsl_dataset) 31405715f94SMark Maybee dp = dn->dn_objset->os_dsl_dataset->ds_dir->dd_pool; 31505715f94SMark Maybee if (dp && dsl_pool_sync_context(dp)) 31605715f94SMark Maybee start = gethrtime(); 317e14bb325SJeff Bonwick zio = zio_root(dn->dn_objset->os_spa, NULL, NULL, ZIO_FLAG_CANFAIL); 318fa9e4066Sahrens blkid = dbuf_whichblock(dn, offset); 319fa9e4066Sahrens for (i = 0; i < nblks; i++) { 320ea8dc4b6Seschrock dmu_buf_impl_t *db = dbuf_hold(dn, blkid+i, tag); 321ea8dc4b6Seschrock if (db == NULL) { 322ea8dc4b6Seschrock rw_exit(&dn->dn_struct_rwlock); 323ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 324ea8dc4b6Seschrock zio_nowait(zio); 325ea8dc4b6Seschrock return (EIO); 326ea8dc4b6Seschrock } 327ea8dc4b6Seschrock /* initiate async i/o */ 32813506d1eSmaybee if (read) { 3297bfdf011SNeil Perrin (void) dbuf_read(db, zio, dbuf_flags); 330ea8dc4b6Seschrock } 331ea8dc4b6Seschrock dbp[i] = &db->db; 332fa9e4066Sahrens } 333fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 334fa9e4066Sahrens 335ea8dc4b6Seschrock /* wait for async i/o */ 336ea8dc4b6Seschrock err = zio_wait(zio); 33705715f94SMark Maybee /* track read overhead when we are in sync context */ 33805715f94SMark Maybee if (dp && dsl_pool_sync_context(dp)) 33905715f94SMark Maybee dp->dp_read_overhead += gethrtime() - start; 340ea8dc4b6Seschrock if (err) { 341ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 342ea8dc4b6Seschrock return (err); 343ea8dc4b6Seschrock } 344fa9e4066Sahrens 345ea8dc4b6Seschrock /* wait for other io to complete */ 346ea8dc4b6Seschrock if (read) { 347ea8dc4b6Seschrock for (i = 0; i < nblks; i++) { 348ea8dc4b6Seschrock dmu_buf_impl_t *db = (dmu_buf_impl_t *)dbp[i]; 349ea8dc4b6Seschrock mutex_enter(&db->db_mtx); 350ea8dc4b6Seschrock while (db->db_state == DB_READ || 351ea8dc4b6Seschrock db->db_state == DB_FILL) 352ea8dc4b6Seschrock cv_wait(&db->db_changed, &db->db_mtx); 353ea8dc4b6Seschrock if (db->db_state == DB_UNCACHED) 354ea8dc4b6Seschrock err = EIO; 355ea8dc4b6Seschrock mutex_exit(&db->db_mtx); 356ea8dc4b6Seschrock if (err) { 357ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 358ea8dc4b6Seschrock return (err); 359ea8dc4b6Seschrock } 360ea8dc4b6Seschrock } 361ea8dc4b6Seschrock } 362fa9e4066Sahrens 363ea8dc4b6Seschrock *numbufsp = nblks; 364ea8dc4b6Seschrock *dbpp = dbp; 365ea8dc4b6Seschrock return (0); 366fa9e4066Sahrens } 367fa9e4066Sahrens 368a2eea2e1Sahrens static int 36913506d1eSmaybee dmu_buf_hold_array(objset_t *os, uint64_t object, uint64_t offset, 37013506d1eSmaybee uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) 37113506d1eSmaybee { 37213506d1eSmaybee dnode_t *dn; 37313506d1eSmaybee int err; 37413506d1eSmaybee 375503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 37613506d1eSmaybee if (err) 37713506d1eSmaybee return (err); 37813506d1eSmaybee 37913506d1eSmaybee err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, 3807bfdf011SNeil Perrin numbufsp, dbpp, DMU_READ_PREFETCH); 38113506d1eSmaybee 38213506d1eSmaybee dnode_rele(dn, FTAG); 38313506d1eSmaybee 38413506d1eSmaybee return (err); 38513506d1eSmaybee } 38613506d1eSmaybee 38713506d1eSmaybee int 38813506d1eSmaybee dmu_buf_hold_array_by_bonus(dmu_buf_t *db, uint64_t offset, 38913506d1eSmaybee uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) 39013506d1eSmaybee { 39113506d1eSmaybee dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 39213506d1eSmaybee int err; 39313506d1eSmaybee 39413506d1eSmaybee err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, 3957bfdf011SNeil Perrin numbufsp, dbpp, DMU_READ_PREFETCH); 39613506d1eSmaybee 39713506d1eSmaybee return (err); 39813506d1eSmaybee } 39913506d1eSmaybee 400fa9e4066Sahrens void 401ea8dc4b6Seschrock dmu_buf_rele_array(dmu_buf_t **dbp_fake, int numbufs, void *tag) 402fa9e4066Sahrens { 403fa9e4066Sahrens int i; 404fa9e4066Sahrens dmu_buf_impl_t **dbp = (dmu_buf_impl_t **)dbp_fake; 405fa9e4066Sahrens 406fa9e4066Sahrens if (numbufs == 0) 407fa9e4066Sahrens return; 408fa9e4066Sahrens 409ea8dc4b6Seschrock for (i = 0; i < numbufs; i++) { 410ea8dc4b6Seschrock if (dbp[i]) 411ea8dc4b6Seschrock dbuf_rele(dbp[i], tag); 412ea8dc4b6Seschrock } 413fa9e4066Sahrens 414fa9e4066Sahrens kmem_free(dbp, sizeof (dmu_buf_t *) * numbufs); 415fa9e4066Sahrens } 416fa9e4066Sahrens 417fa9e4066Sahrens void 418fa9e4066Sahrens dmu_prefetch(objset_t *os, uint64_t object, uint64_t offset, uint64_t len) 419fa9e4066Sahrens { 420fa9e4066Sahrens dnode_t *dn; 421fa9e4066Sahrens uint64_t blkid; 422ea8dc4b6Seschrock int nblks, i, err; 423fa9e4066Sahrens 424416e0cd8Sek if (zfs_prefetch_disable) 425416e0cd8Sek return; 426416e0cd8Sek 427fa9e4066Sahrens if (len == 0) { /* they're interested in the bonus buffer */ 428503ad85cSMatthew Ahrens dn = os->os_meta_dnode; 429fa9e4066Sahrens 430fa9e4066Sahrens if (object == 0 || object >= DN_MAX_OBJECT) 431fa9e4066Sahrens return; 432fa9e4066Sahrens 433fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 434fa9e4066Sahrens blkid = dbuf_whichblock(dn, object * sizeof (dnode_phys_t)); 435fa9e4066Sahrens dbuf_prefetch(dn, blkid); 436fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 437fa9e4066Sahrens return; 438fa9e4066Sahrens } 439fa9e4066Sahrens 440fa9e4066Sahrens /* 441fa9e4066Sahrens * XXX - Note, if the dnode for the requested object is not 442fa9e4066Sahrens * already cached, we will do a *synchronous* read in the 443fa9e4066Sahrens * dnode_hold() call. The same is true for any indirects. 444fa9e4066Sahrens */ 445503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 446ea8dc4b6Seschrock if (err != 0) 447fa9e4066Sahrens return; 448fa9e4066Sahrens 449fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 450fa9e4066Sahrens if (dn->dn_datablkshift) { 451fa9e4066Sahrens int blkshift = dn->dn_datablkshift; 452fa9e4066Sahrens nblks = (P2ROUNDUP(offset+len, 1<<blkshift) - 453b1b8ab34Slling P2ALIGN(offset, 1<<blkshift)) >> blkshift; 454fa9e4066Sahrens } else { 455fa9e4066Sahrens nblks = (offset < dn->dn_datablksz); 456fa9e4066Sahrens } 457fa9e4066Sahrens 458fa9e4066Sahrens if (nblks != 0) { 459fa9e4066Sahrens blkid = dbuf_whichblock(dn, offset); 460fa9e4066Sahrens for (i = 0; i < nblks; i++) 461fa9e4066Sahrens dbuf_prefetch(dn, blkid+i); 462fa9e4066Sahrens } 463fa9e4066Sahrens 464fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 465fa9e4066Sahrens 466fa9e4066Sahrens dnode_rele(dn, FTAG); 467fa9e4066Sahrens } 468fa9e4066Sahrens 46976256205SMark Maybee /* 47076256205SMark Maybee * Get the next "chunk" of file data to free. We traverse the file from 47176256205SMark Maybee * the end so that the file gets shorter over time (if we crashes in the 47276256205SMark Maybee * middle, this will leave us in a better state). We find allocated file 47376256205SMark Maybee * data by simply searching the allocated level 1 indirects. 47476256205SMark Maybee */ 475cdb0ab79Smaybee static int 47676256205SMark Maybee get_next_chunk(dnode_t *dn, uint64_t *start, uint64_t limit) 477cdb0ab79Smaybee { 47876256205SMark Maybee uint64_t len = *start - limit; 47976256205SMark Maybee uint64_t blkcnt = 0; 48076256205SMark Maybee uint64_t maxblks = DMU_MAX_ACCESS / (1ULL << (dn->dn_indblkshift + 1)); 48176256205SMark Maybee uint64_t iblkrange = 4821c8564a7SMark Maybee dn->dn_datablksz * EPB(dn->dn_indblkshift, SPA_BLKPTRSHIFT); 483cdb0ab79Smaybee 48476256205SMark Maybee ASSERT(limit <= *start); 485cdb0ab79Smaybee 48676256205SMark Maybee if (len <= iblkrange * maxblks) { 48776256205SMark Maybee *start = limit; 488cdb0ab79Smaybee return (0); 489cdb0ab79Smaybee } 49076256205SMark Maybee ASSERT(ISP2(iblkrange)); 491cdb0ab79Smaybee 49276256205SMark Maybee while (*start > limit && blkcnt < maxblks) { 4931c8564a7SMark Maybee int err; 494cdb0ab79Smaybee 49576256205SMark Maybee /* find next allocated L1 indirect */ 496cdb0ab79Smaybee err = dnode_next_offset(dn, 49776256205SMark Maybee DNODE_FIND_BACKWARDS, start, 2, 1, 0); 498cdb0ab79Smaybee 49976256205SMark Maybee /* if there are no more, then we are done */ 50076256205SMark Maybee if (err == ESRCH) { 50176256205SMark Maybee *start = limit; 502cdb0ab79Smaybee return (0); 50376256205SMark Maybee } else if (err) { 504cdb0ab79Smaybee return (err); 50576256205SMark Maybee } 50676256205SMark Maybee blkcnt += 1; 50776256205SMark Maybee 50876256205SMark Maybee /* reset offset to end of "next" block back */ 50976256205SMark Maybee *start = P2ALIGN(*start, iblkrange); 51076256205SMark Maybee if (*start <= limit) 51176256205SMark Maybee *start = limit; 51276256205SMark Maybee else 51376256205SMark Maybee *start -= 1; 514cdb0ab79Smaybee } 515cdb0ab79Smaybee return (0); 516cdb0ab79Smaybee } 517cdb0ab79Smaybee 518cdb0ab79Smaybee static int 519cdb0ab79Smaybee dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset, 520cdb0ab79Smaybee uint64_t length, boolean_t free_dnode) 521cdb0ab79Smaybee { 522cdb0ab79Smaybee dmu_tx_t *tx; 523cdb0ab79Smaybee uint64_t object_size, start, end, len; 524cdb0ab79Smaybee boolean_t trunc = (length == DMU_OBJECT_END); 525cdb0ab79Smaybee int align, err; 526cdb0ab79Smaybee 527cdb0ab79Smaybee align = 1 << dn->dn_datablkshift; 528cdb0ab79Smaybee ASSERT(align > 0); 529cdb0ab79Smaybee object_size = align == 1 ? dn->dn_datablksz : 530cdb0ab79Smaybee (dn->dn_maxblkid + 1) << dn->dn_datablkshift; 531cdb0ab79Smaybee 53214843421SMatthew Ahrens end = offset + length; 53314843421SMatthew Ahrens if (trunc || end > object_size) 534cdb0ab79Smaybee end = object_size; 535cdb0ab79Smaybee if (end <= offset) 536cdb0ab79Smaybee return (0); 537cdb0ab79Smaybee length = end - offset; 538cdb0ab79Smaybee 539cdb0ab79Smaybee while (length) { 540cdb0ab79Smaybee start = end; 54114843421SMatthew Ahrens /* assert(offset <= start) */ 542cdb0ab79Smaybee err = get_next_chunk(dn, &start, offset); 543cdb0ab79Smaybee if (err) 544cdb0ab79Smaybee return (err); 545cdb0ab79Smaybee len = trunc ? DMU_OBJECT_END : end - start; 546cdb0ab79Smaybee 547cdb0ab79Smaybee tx = dmu_tx_create(os); 548cdb0ab79Smaybee dmu_tx_hold_free(tx, dn->dn_object, start, len); 549cdb0ab79Smaybee err = dmu_tx_assign(tx, TXG_WAIT); 550cdb0ab79Smaybee if (err) { 551cdb0ab79Smaybee dmu_tx_abort(tx); 552cdb0ab79Smaybee return (err); 553cdb0ab79Smaybee } 554cdb0ab79Smaybee 555cdb0ab79Smaybee dnode_free_range(dn, start, trunc ? -1 : len, tx); 556cdb0ab79Smaybee 5571c8564a7SMark Maybee if (start == 0 && free_dnode) { 5581c8564a7SMark Maybee ASSERT(trunc); 559cdb0ab79Smaybee dnode_free(dn, tx); 5601c8564a7SMark Maybee } 561cdb0ab79Smaybee 562cdb0ab79Smaybee length -= end - start; 563cdb0ab79Smaybee 564cdb0ab79Smaybee dmu_tx_commit(tx); 565cdb0ab79Smaybee end = start; 566cdb0ab79Smaybee } 567cdb0ab79Smaybee return (0); 568cdb0ab79Smaybee } 569cdb0ab79Smaybee 570cdb0ab79Smaybee int 571cdb0ab79Smaybee dmu_free_long_range(objset_t *os, uint64_t object, 572cdb0ab79Smaybee uint64_t offset, uint64_t length) 573cdb0ab79Smaybee { 574cdb0ab79Smaybee dnode_t *dn; 575cdb0ab79Smaybee int err; 576cdb0ab79Smaybee 577503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 578cdb0ab79Smaybee if (err != 0) 579cdb0ab79Smaybee return (err); 580cdb0ab79Smaybee err = dmu_free_long_range_impl(os, dn, offset, length, FALSE); 581cdb0ab79Smaybee dnode_rele(dn, FTAG); 582cdb0ab79Smaybee return (err); 583cdb0ab79Smaybee } 584cdb0ab79Smaybee 585cdb0ab79Smaybee int 586cdb0ab79Smaybee dmu_free_object(objset_t *os, uint64_t object) 587cdb0ab79Smaybee { 588cdb0ab79Smaybee dnode_t *dn; 589cdb0ab79Smaybee dmu_tx_t *tx; 590cdb0ab79Smaybee int err; 591cdb0ab79Smaybee 592503ad85cSMatthew Ahrens err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, 593cdb0ab79Smaybee FTAG, &dn); 594cdb0ab79Smaybee if (err != 0) 595cdb0ab79Smaybee return (err); 596cdb0ab79Smaybee if (dn->dn_nlevels == 1) { 597cdb0ab79Smaybee tx = dmu_tx_create(os); 598cdb0ab79Smaybee dmu_tx_hold_bonus(tx, object); 599cdb0ab79Smaybee dmu_tx_hold_free(tx, dn->dn_object, 0, DMU_OBJECT_END); 600cdb0ab79Smaybee err = dmu_tx_assign(tx, TXG_WAIT); 601cdb0ab79Smaybee if (err == 0) { 602cdb0ab79Smaybee dnode_free_range(dn, 0, DMU_OBJECT_END, tx); 603cdb0ab79Smaybee dnode_free(dn, tx); 604cdb0ab79Smaybee dmu_tx_commit(tx); 605cdb0ab79Smaybee } else { 606cdb0ab79Smaybee dmu_tx_abort(tx); 607cdb0ab79Smaybee } 608cdb0ab79Smaybee } else { 609cdb0ab79Smaybee err = dmu_free_long_range_impl(os, dn, 0, DMU_OBJECT_END, TRUE); 610cdb0ab79Smaybee } 611cdb0ab79Smaybee dnode_rele(dn, FTAG); 612cdb0ab79Smaybee return (err); 613cdb0ab79Smaybee } 614cdb0ab79Smaybee 615ea8dc4b6Seschrock int 616fa9e4066Sahrens dmu_free_range(objset_t *os, uint64_t object, uint64_t offset, 617fa9e4066Sahrens uint64_t size, dmu_tx_t *tx) 618fa9e4066Sahrens { 619ea8dc4b6Seschrock dnode_t *dn; 620503ad85cSMatthew Ahrens int err = dnode_hold(os, object, FTAG, &dn); 621ea8dc4b6Seschrock if (err) 622ea8dc4b6Seschrock return (err); 623fa9e4066Sahrens ASSERT(offset < UINT64_MAX); 624fa9e4066Sahrens ASSERT(size == -1ULL || size <= UINT64_MAX - offset); 625fa9e4066Sahrens dnode_free_range(dn, offset, size, tx); 626fa9e4066Sahrens dnode_rele(dn, FTAG); 627ea8dc4b6Seschrock return (0); 628fa9e4066Sahrens } 629fa9e4066Sahrens 630ea8dc4b6Seschrock int 631ea8dc4b6Seschrock dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 6327bfdf011SNeil Perrin void *buf, uint32_t flags) 633fa9e4066Sahrens { 634fa9e4066Sahrens dnode_t *dn; 635fa9e4066Sahrens dmu_buf_t **dbp; 636c87b8fc5SMark J Musante int numbufs, err; 637fa9e4066Sahrens 638503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 639ea8dc4b6Seschrock if (err) 640ea8dc4b6Seschrock return (err); 641feb08c6bSbillm 642feb08c6bSbillm /* 643feb08c6bSbillm * Deal with odd block sizes, where there can't be data past the first 644feb08c6bSbillm * block. If we ever do the tail block optimization, we will need to 645feb08c6bSbillm * handle that here as well. 646feb08c6bSbillm */ 647c87b8fc5SMark J Musante if (dn->dn_maxblkid == 0) { 648fa9e4066Sahrens int newsz = offset > dn->dn_datablksz ? 0 : 649fa9e4066Sahrens MIN(size, dn->dn_datablksz - offset); 650fa9e4066Sahrens bzero((char *)buf + newsz, size - newsz); 651fa9e4066Sahrens size = newsz; 652fa9e4066Sahrens } 653fa9e4066Sahrens 654fa9e4066Sahrens while (size > 0) { 655fa9e4066Sahrens uint64_t mylen = MIN(size, DMU_MAX_ACCESS / 2); 656c87b8fc5SMark J Musante int i; 657fa9e4066Sahrens 658fa9e4066Sahrens /* 659fa9e4066Sahrens * NB: we could do this block-at-a-time, but it's nice 660fa9e4066Sahrens * to be reading in parallel. 661fa9e4066Sahrens */ 662a2eea2e1Sahrens err = dmu_buf_hold_array_by_dnode(dn, offset, mylen, 6637bfdf011SNeil Perrin TRUE, FTAG, &numbufs, &dbp, flags); 664ea8dc4b6Seschrock if (err) 6651934e92fSmaybee break; 666fa9e4066Sahrens 667fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 668fa9e4066Sahrens int tocpy; 669fa9e4066Sahrens int bufoff; 670fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 671fa9e4066Sahrens 672fa9e4066Sahrens ASSERT(size > 0); 673fa9e4066Sahrens 674fa9e4066Sahrens bufoff = offset - db->db_offset; 675fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 676fa9e4066Sahrens 677fa9e4066Sahrens bcopy((char *)db->db_data + bufoff, buf, tocpy); 678fa9e4066Sahrens 679fa9e4066Sahrens offset += tocpy; 680fa9e4066Sahrens size -= tocpy; 681fa9e4066Sahrens buf = (char *)buf + tocpy; 682fa9e4066Sahrens } 683ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 684fa9e4066Sahrens } 685a2eea2e1Sahrens dnode_rele(dn, FTAG); 6861934e92fSmaybee return (err); 687fa9e4066Sahrens } 688fa9e4066Sahrens 689fa9e4066Sahrens void 690fa9e4066Sahrens dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 691fa9e4066Sahrens const void *buf, dmu_tx_t *tx) 692fa9e4066Sahrens { 693fa9e4066Sahrens dmu_buf_t **dbp; 694fa9e4066Sahrens int numbufs, i; 695fa9e4066Sahrens 69613506d1eSmaybee if (size == 0) 69713506d1eSmaybee return; 69813506d1eSmaybee 699ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, 700ea8dc4b6Seschrock FALSE, FTAG, &numbufs, &dbp)); 701fa9e4066Sahrens 702fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 703fa9e4066Sahrens int tocpy; 704fa9e4066Sahrens int bufoff; 705fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 706fa9e4066Sahrens 707fa9e4066Sahrens ASSERT(size > 0); 708fa9e4066Sahrens 709fa9e4066Sahrens bufoff = offset - db->db_offset; 710fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 711fa9e4066Sahrens 712fa9e4066Sahrens ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 713fa9e4066Sahrens 714fa9e4066Sahrens if (tocpy == db->db_size) 715fa9e4066Sahrens dmu_buf_will_fill(db, tx); 716fa9e4066Sahrens else 717fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 718fa9e4066Sahrens 719fa9e4066Sahrens bcopy(buf, (char *)db->db_data + bufoff, tocpy); 720fa9e4066Sahrens 721fa9e4066Sahrens if (tocpy == db->db_size) 722fa9e4066Sahrens dmu_buf_fill_done(db, tx); 723fa9e4066Sahrens 724fa9e4066Sahrens offset += tocpy; 725fa9e4066Sahrens size -= tocpy; 726fa9e4066Sahrens buf = (char *)buf + tocpy; 727fa9e4066Sahrens } 728ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 729fa9e4066Sahrens } 730fa9e4066Sahrens 73182c9918fSTim Haley void 73282c9918fSTim Haley dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 73382c9918fSTim Haley dmu_tx_t *tx) 73482c9918fSTim Haley { 73582c9918fSTim Haley dmu_buf_t **dbp; 73682c9918fSTim Haley int numbufs, i; 73782c9918fSTim Haley 73882c9918fSTim Haley if (size == 0) 73982c9918fSTim Haley return; 74082c9918fSTim Haley 74182c9918fSTim Haley VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, 74282c9918fSTim Haley FALSE, FTAG, &numbufs, &dbp)); 74382c9918fSTim Haley 74482c9918fSTim Haley for (i = 0; i < numbufs; i++) { 74582c9918fSTim Haley dmu_buf_t *db = dbp[i]; 74682c9918fSTim Haley 74782c9918fSTim Haley dmu_buf_will_not_fill(db, tx); 74882c9918fSTim Haley } 74982c9918fSTim Haley dmu_buf_rele_array(dbp, numbufs, FTAG); 75082c9918fSTim Haley } 75182c9918fSTim Haley 752c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 753c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * DMU support for xuio 754c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 755c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_t *xuio_ksp = NULL; 756c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 757c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 758c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_init(xuio_t *xuio, int nblk) 759c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 760c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv; 761c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 762c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 763c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_iovcnt = nblk; 764c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_iov = kmem_zalloc(nblk * sizeof (iovec_t), KM_SLEEP); 765c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 766c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv = kmem_zalloc(sizeof (dmu_xuio_t), KM_SLEEP); 767c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->cnt = nblk; 768c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs = kmem_zalloc(nblk * sizeof (arc_buf_t *), KM_SLEEP); 769c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->iovp = uio->uio_iov; 770c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIO_XUZC_PRIV(xuio) = priv; 771c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 772c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (XUIO_XUZC_RW(xuio) == UIO_READ) 773c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_rbuf, nblk); 774c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 775c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_wbuf, nblk); 776c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 777c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 778c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 779c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 780c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 781c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_fini(xuio_t *xuio) 782c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 783c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 784c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int nblk = priv->cnt; 785c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 786c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv->iovp, nblk * sizeof (iovec_t)); 787c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv->bufs, nblk * sizeof (arc_buf_t *)); 788c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv, sizeof (dmu_xuio_t)); 789c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 790c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (XUIO_XUZC_RW(xuio) == UIO_READ) 791c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_rbuf, -nblk); 792c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 793c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_wbuf, -nblk); 794c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 795c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 796c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 797c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Initialize iov[priv->next] and priv->bufs[priv->next] with { off, n, abuf } 798c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * and increase priv->next by 1. 799c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 800c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 801c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_add(xuio_t *xuio, arc_buf_t *abuf, offset_t off, size_t n) 802c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 803c242f9a0Schunli zhang - Sun Microsystems - Irvine United States struct iovec *iov; 804c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 805c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 806c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int i = priv->next++; 807c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 808c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 809c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(off + n <= arc_buf_size(abuf)); 810c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov = uio->uio_iov + i; 811c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov->iov_base = (char *)abuf->b_data + off; 812c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov->iov_len = n; 813c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs[i] = abuf; 814c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 815c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 816c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 817c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 818c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_cnt(xuio_t *xuio) 819c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 820c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 821c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (priv->cnt); 822c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 823c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 824c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t * 825c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_arcbuf(xuio_t *xuio, int i) 826c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 827c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 828c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 829c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 830c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (priv->bufs[i]); 831c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 832c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 833c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 834c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_clear(xuio_t *xuio, int i) 835c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 836c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 837c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 838c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 839c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs[i] = NULL; 840c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 841c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 842c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static void 843c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_init(void) 844c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 845c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp = kstat_create("zfs", 0, "xuio_stats", "misc", 846c242f9a0Schunli zhang - Sun Microsystems - Irvine United States KSTAT_TYPE_NAMED, sizeof (xuio_stats) / sizeof (kstat_named_t), 847c242f9a0Schunli zhang - Sun Microsystems - Irvine United States KSTAT_FLAG_VIRTUAL); 848c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio_ksp != NULL) { 849c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp->ks_data = &xuio_stats; 850c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_install(xuio_ksp); 851c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 852c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 853c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 854c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static void 855c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_fini(void) 856c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 857c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio_ksp != NULL) { 858c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_delete(xuio_ksp); 859c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp = NULL; 860c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 861c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 862c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 863c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 864c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_wbuf_copied() 865c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 866c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_copied); 867c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 868c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 869c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 870c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_wbuf_nocopy() 871c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 872c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_nocopy); 873c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 874c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 875fa9e4066Sahrens #ifdef _KERNEL 876fa9e4066Sahrens int 877feb08c6bSbillm dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size) 878feb08c6bSbillm { 879feb08c6bSbillm dmu_buf_t **dbp; 880feb08c6bSbillm int numbufs, i, err; 881c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_t *xuio = NULL; 882feb08c6bSbillm 883feb08c6bSbillm /* 884feb08c6bSbillm * NB: we could do this block-at-a-time, but it's nice 885feb08c6bSbillm * to be reading in parallel. 886feb08c6bSbillm */ 887feb08c6bSbillm err = dmu_buf_hold_array(os, object, uio->uio_loffset, size, TRUE, FTAG, 888feb08c6bSbillm &numbufs, &dbp); 889feb08c6bSbillm if (err) 890feb08c6bSbillm return (err); 891feb08c6bSbillm 892c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (uio->uio_extflg == UIO_XUIO) 893c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio = (xuio_t *)uio; 894c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 895feb08c6bSbillm for (i = 0; i < numbufs; i++) { 896feb08c6bSbillm int tocpy; 897feb08c6bSbillm int bufoff; 898feb08c6bSbillm dmu_buf_t *db = dbp[i]; 899feb08c6bSbillm 900feb08c6bSbillm ASSERT(size > 0); 901feb08c6bSbillm 902feb08c6bSbillm bufoff = uio->uio_loffset - db->db_offset; 903feb08c6bSbillm tocpy = (int)MIN(db->db_size - bufoff, size); 904feb08c6bSbillm 905c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio) { 906c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db; 907c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *dbuf_abuf = dbi->db_buf; 908c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *abuf = dbuf_loan_arcbuf(dbi); 909c242f9a0Schunli zhang - Sun Microsystems - Irvine United States err = dmu_xuio_add(xuio, abuf, bufoff, tocpy); 910c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (!err) { 911c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_resid -= tocpy; 912c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_loffset += tocpy; 913c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 914c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 915c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (abuf == dbuf_abuf) 916c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_rbuf_nocopy); 917c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 918c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_rbuf_copied); 919c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else { 920c242f9a0Schunli zhang - Sun Microsystems - Irvine United States err = uiomove((char *)db->db_data + bufoff, tocpy, 921c242f9a0Schunli zhang - Sun Microsystems - Irvine United States UIO_READ, uio); 922c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 923feb08c6bSbillm if (err) 924feb08c6bSbillm break; 925feb08c6bSbillm 926feb08c6bSbillm size -= tocpy; 927feb08c6bSbillm } 928feb08c6bSbillm dmu_buf_rele_array(dbp, numbufs, FTAG); 929feb08c6bSbillm 930feb08c6bSbillm return (err); 931feb08c6bSbillm } 932feb08c6bSbillm 93394d1a210STim Haley static int 93494d1a210STim Haley dmu_write_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size, dmu_tx_t *tx) 935fa9e4066Sahrens { 936fa9e4066Sahrens dmu_buf_t **dbp; 93794d1a210STim Haley int numbufs; 938fa9e4066Sahrens int err = 0; 93994d1a210STim Haley int i; 940fa9e4066Sahrens 94194d1a210STim Haley err = dmu_buf_hold_array_by_dnode(dn, uio->uio_loffset, size, 94294d1a210STim Haley FALSE, FTAG, &numbufs, &dbp, DMU_READ_PREFETCH); 943ea8dc4b6Seschrock if (err) 944ea8dc4b6Seschrock return (err); 945fa9e4066Sahrens 946fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 947fa9e4066Sahrens int tocpy; 948fa9e4066Sahrens int bufoff; 949fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 950fa9e4066Sahrens 951fa9e4066Sahrens ASSERT(size > 0); 952fa9e4066Sahrens 953feb08c6bSbillm bufoff = uio->uio_loffset - db->db_offset; 954fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 955fa9e4066Sahrens 956fa9e4066Sahrens ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 957fa9e4066Sahrens 958fa9e4066Sahrens if (tocpy == db->db_size) 959fa9e4066Sahrens dmu_buf_will_fill(db, tx); 960fa9e4066Sahrens else 961fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 962fa9e4066Sahrens 963fa9e4066Sahrens /* 964fa9e4066Sahrens * XXX uiomove could block forever (eg. nfs-backed 965fa9e4066Sahrens * pages). There needs to be a uiolockdown() function 966fa9e4066Sahrens * to lock the pages in memory, so that uiomove won't 967fa9e4066Sahrens * block. 968fa9e4066Sahrens */ 969fa9e4066Sahrens err = uiomove((char *)db->db_data + bufoff, tocpy, 970fa9e4066Sahrens UIO_WRITE, uio); 971fa9e4066Sahrens 972fa9e4066Sahrens if (tocpy == db->db_size) 973fa9e4066Sahrens dmu_buf_fill_done(db, tx); 974fa9e4066Sahrens 975fa9e4066Sahrens if (err) 976fa9e4066Sahrens break; 977fa9e4066Sahrens 978fa9e4066Sahrens size -= tocpy; 979fa9e4066Sahrens } 98094d1a210STim Haley 981ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 982fa9e4066Sahrens return (err); 983fa9e4066Sahrens } 98444eda4d7Smaybee 98594d1a210STim Haley int 98694d1a210STim Haley dmu_write_uio_dbuf(dmu_buf_t *zdb, uio_t *uio, uint64_t size, 98794d1a210STim Haley dmu_tx_t *tx) 98894d1a210STim Haley { 98994d1a210STim Haley if (size == 0) 99094d1a210STim Haley return (0); 99194d1a210STim Haley 99294d1a210STim Haley return (dmu_write_uio_dnode(((dmu_buf_impl_t *)zdb)->db_dnode, 99394d1a210STim Haley uio, size, tx)); 99494d1a210STim Haley } 99594d1a210STim Haley 99694d1a210STim Haley int 99794d1a210STim Haley dmu_write_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size, 99894d1a210STim Haley dmu_tx_t *tx) 99994d1a210STim Haley { 100094d1a210STim Haley dnode_t *dn; 100194d1a210STim Haley int err; 100294d1a210STim Haley 100394d1a210STim Haley if (size == 0) 100494d1a210STim Haley return (0); 100594d1a210STim Haley 100694d1a210STim Haley err = dnode_hold(os, object, FTAG, &dn); 100794d1a210STim Haley if (err) 100894d1a210STim Haley return (err); 100994d1a210STim Haley 101094d1a210STim Haley err = dmu_write_uio_dnode(dn, uio, size, tx); 101194d1a210STim Haley 101294d1a210STim Haley dnode_rele(dn, FTAG); 101394d1a210STim Haley 101494d1a210STim Haley return (err); 101594d1a210STim Haley } 101694d1a210STim Haley 101744eda4d7Smaybee int 101844eda4d7Smaybee dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 101944eda4d7Smaybee page_t *pp, dmu_tx_t *tx) 102044eda4d7Smaybee { 102144eda4d7Smaybee dmu_buf_t **dbp; 102244eda4d7Smaybee int numbufs, i; 102344eda4d7Smaybee int err; 102444eda4d7Smaybee 102544eda4d7Smaybee if (size == 0) 102644eda4d7Smaybee return (0); 102744eda4d7Smaybee 102844eda4d7Smaybee err = dmu_buf_hold_array(os, object, offset, size, 102944eda4d7Smaybee FALSE, FTAG, &numbufs, &dbp); 103044eda4d7Smaybee if (err) 103144eda4d7Smaybee return (err); 103244eda4d7Smaybee 103344eda4d7Smaybee for (i = 0; i < numbufs; i++) { 103444eda4d7Smaybee int tocpy, copied, thiscpy; 103544eda4d7Smaybee int bufoff; 103644eda4d7Smaybee dmu_buf_t *db = dbp[i]; 103744eda4d7Smaybee caddr_t va; 103844eda4d7Smaybee 103944eda4d7Smaybee ASSERT(size > 0); 104044eda4d7Smaybee ASSERT3U(db->db_size, >=, PAGESIZE); 104144eda4d7Smaybee 104244eda4d7Smaybee bufoff = offset - db->db_offset; 104344eda4d7Smaybee tocpy = (int)MIN(db->db_size - bufoff, size); 104444eda4d7Smaybee 104544eda4d7Smaybee ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 104644eda4d7Smaybee 104744eda4d7Smaybee if (tocpy == db->db_size) 104844eda4d7Smaybee dmu_buf_will_fill(db, tx); 104944eda4d7Smaybee else 105044eda4d7Smaybee dmu_buf_will_dirty(db, tx); 105144eda4d7Smaybee 105244eda4d7Smaybee for (copied = 0; copied < tocpy; copied += PAGESIZE) { 105344eda4d7Smaybee ASSERT3U(pp->p_offset, ==, db->db_offset + bufoff); 105444eda4d7Smaybee thiscpy = MIN(PAGESIZE, tocpy - copied); 10550fab61baSJonathan W Adams va = zfs_map_page(pp, S_READ); 105644eda4d7Smaybee bcopy(va, (char *)db->db_data + bufoff, thiscpy); 10570fab61baSJonathan W Adams zfs_unmap_page(pp, va); 105844eda4d7Smaybee pp = pp->p_next; 105944eda4d7Smaybee bufoff += PAGESIZE; 106044eda4d7Smaybee } 106144eda4d7Smaybee 106244eda4d7Smaybee if (tocpy == db->db_size) 106344eda4d7Smaybee dmu_buf_fill_done(db, tx); 106444eda4d7Smaybee 106544eda4d7Smaybee offset += tocpy; 106644eda4d7Smaybee size -= tocpy; 106744eda4d7Smaybee } 106844eda4d7Smaybee dmu_buf_rele_array(dbp, numbufs, FTAG); 106944eda4d7Smaybee return (err); 107044eda4d7Smaybee } 1071fa9e4066Sahrens #endif 1072fa9e4066Sahrens 10732fdbea25SAleksandr Guzovskiy /* 10742fdbea25SAleksandr Guzovskiy * Allocate a loaned anonymous arc buffer. 10752fdbea25SAleksandr Guzovskiy */ 10762fdbea25SAleksandr Guzovskiy arc_buf_t * 10772fdbea25SAleksandr Guzovskiy dmu_request_arcbuf(dmu_buf_t *handle, int size) 10782fdbea25SAleksandr Guzovskiy { 10792fdbea25SAleksandr Guzovskiy dnode_t *dn = ((dmu_buf_impl_t *)handle)->db_dnode; 10802fdbea25SAleksandr Guzovskiy 10812fdbea25SAleksandr Guzovskiy return (arc_loan_buf(dn->dn_objset->os_spa, size)); 10822fdbea25SAleksandr Guzovskiy } 10832fdbea25SAleksandr Guzovskiy 10842fdbea25SAleksandr Guzovskiy /* 10852fdbea25SAleksandr Guzovskiy * Free a loaned arc buffer. 10862fdbea25SAleksandr Guzovskiy */ 10872fdbea25SAleksandr Guzovskiy void 10882fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(arc_buf_t *buf) 10892fdbea25SAleksandr Guzovskiy { 10902fdbea25SAleksandr Guzovskiy arc_return_buf(buf, FTAG); 10912fdbea25SAleksandr Guzovskiy VERIFY(arc_buf_remove_ref(buf, FTAG) == 1); 10922fdbea25SAleksandr Guzovskiy } 10932fdbea25SAleksandr Guzovskiy 10942fdbea25SAleksandr Guzovskiy /* 10952fdbea25SAleksandr Guzovskiy * When possible directly assign passed loaned arc buffer to a dbuf. 10962fdbea25SAleksandr Guzovskiy * If this is not possible copy the contents of passed arc buf via 10972fdbea25SAleksandr Guzovskiy * dmu_write(). 10982fdbea25SAleksandr Guzovskiy */ 10992fdbea25SAleksandr Guzovskiy void 11002fdbea25SAleksandr Guzovskiy dmu_assign_arcbuf(dmu_buf_t *handle, uint64_t offset, arc_buf_t *buf, 11012fdbea25SAleksandr Guzovskiy dmu_tx_t *tx) 11022fdbea25SAleksandr Guzovskiy { 11032fdbea25SAleksandr Guzovskiy dnode_t *dn = ((dmu_buf_impl_t *)handle)->db_dnode; 11042fdbea25SAleksandr Guzovskiy dmu_buf_impl_t *db; 11052fdbea25SAleksandr Guzovskiy uint32_t blksz = (uint32_t)arc_buf_size(buf); 11062fdbea25SAleksandr Guzovskiy uint64_t blkid; 11072fdbea25SAleksandr Guzovskiy 11082fdbea25SAleksandr Guzovskiy rw_enter(&dn->dn_struct_rwlock, RW_READER); 11092fdbea25SAleksandr Guzovskiy blkid = dbuf_whichblock(dn, offset); 11102fdbea25SAleksandr Guzovskiy VERIFY((db = dbuf_hold(dn, blkid, FTAG)) != NULL); 11112fdbea25SAleksandr Guzovskiy rw_exit(&dn->dn_struct_rwlock); 11122fdbea25SAleksandr Guzovskiy 11132fdbea25SAleksandr Guzovskiy if (offset == db->db.db_offset && blksz == db->db.db_size) { 11142fdbea25SAleksandr Guzovskiy dbuf_assign_arcbuf(db, buf, tx); 11152fdbea25SAleksandr Guzovskiy dbuf_rele(db, FTAG); 11162fdbea25SAleksandr Guzovskiy } else { 11172fdbea25SAleksandr Guzovskiy dbuf_rele(db, FTAG); 1118503ad85cSMatthew Ahrens dmu_write(dn->dn_objset, dn->dn_object, offset, blksz, 11192fdbea25SAleksandr Guzovskiy buf->b_data, tx); 11202fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(buf); 1121c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_copied); 11222fdbea25SAleksandr Guzovskiy } 11232fdbea25SAleksandr Guzovskiy } 11242fdbea25SAleksandr Guzovskiy 1125c5c6ffa0Smaybee typedef struct { 1126b24ab676SJeff Bonwick dbuf_dirty_record_t *dsa_dr; 1127b24ab676SJeff Bonwick dmu_sync_cb_t *dsa_done; 1128b24ab676SJeff Bonwick zgd_t *dsa_zgd; 1129b24ab676SJeff Bonwick dmu_tx_t *dsa_tx; 1130c717a561Smaybee } dmu_sync_arg_t; 1131c5c6ffa0Smaybee 1132e14bb325SJeff Bonwick /* ARGSUSED */ 1133e14bb325SJeff Bonwick static void 1134e14bb325SJeff Bonwick dmu_sync_ready(zio_t *zio, arc_buf_t *buf, void *varg) 1135e14bb325SJeff Bonwick { 1136b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = varg; 1137b24ab676SJeff Bonwick dmu_buf_t *db = dsa->dsa_zgd->zgd_db; 1138b24ab676SJeff Bonwick dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 1139e14bb325SJeff Bonwick blkptr_t *bp = zio->io_bp; 1140975c32a0SNeil Perrin 1141b24ab676SJeff Bonwick if (zio->io_error == 0) { 1142b24ab676SJeff Bonwick if (BP_IS_HOLE(bp)) { 1143b24ab676SJeff Bonwick /* 1144b24ab676SJeff Bonwick * A block of zeros may compress to a hole, but the 1145b24ab676SJeff Bonwick * block size still needs to be known for replay. 1146b24ab676SJeff Bonwick */ 1147b24ab676SJeff Bonwick BP_SET_LSIZE(bp, db->db_size); 1148b24ab676SJeff Bonwick } else { 1149b24ab676SJeff Bonwick ASSERT(BP_GET_TYPE(bp) == dn->dn_type); 1150b24ab676SJeff Bonwick ASSERT(BP_GET_LEVEL(bp) == 0); 1151b24ab676SJeff Bonwick bp->blk_fill = 1; 1152b24ab676SJeff Bonwick } 1153e14bb325SJeff Bonwick } 1154e14bb325SJeff Bonwick } 1155e14bb325SJeff Bonwick 1156b24ab676SJeff Bonwick static void 1157b24ab676SJeff Bonwick dmu_sync_late_arrival_ready(zio_t *zio) 1158b24ab676SJeff Bonwick { 1159b24ab676SJeff Bonwick dmu_sync_ready(zio, NULL, zio->io_private); 1160b24ab676SJeff Bonwick } 1161b24ab676SJeff Bonwick 1162c5c6ffa0Smaybee /* ARGSUSED */ 1163c5c6ffa0Smaybee static void 1164c5c6ffa0Smaybee dmu_sync_done(zio_t *zio, arc_buf_t *buf, void *varg) 1165c5c6ffa0Smaybee { 1166b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = varg; 1167b24ab676SJeff Bonwick dbuf_dirty_record_t *dr = dsa->dsa_dr; 1168c717a561Smaybee dmu_buf_impl_t *db = dr->dr_dbuf; 1169c5c6ffa0Smaybee 1170b50a0fe0SNeil Perrin mutex_enter(&db->db_mtx); 1171b50a0fe0SNeil Perrin ASSERT(dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC); 1172b24ab676SJeff Bonwick if (zio->io_error == 0) { 1173b24ab676SJeff Bonwick dr->dt.dl.dr_overridden_by = *zio->io_bp; 1174b24ab676SJeff Bonwick dr->dt.dl.dr_override_state = DR_OVERRIDDEN; 1175b24ab676SJeff Bonwick dr->dt.dl.dr_copies = zio->io_prop.zp_copies; 1176b24ab676SJeff Bonwick if (BP_IS_HOLE(&dr->dt.dl.dr_overridden_by)) 1177b24ab676SJeff Bonwick BP_ZERO(&dr->dt.dl.dr_overridden_by); 1178b24ab676SJeff Bonwick } else { 1179b24ab676SJeff Bonwick dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN; 1180b24ab676SJeff Bonwick } 1181c5c6ffa0Smaybee cv_broadcast(&db->db_changed); 1182b50a0fe0SNeil Perrin mutex_exit(&db->db_mtx); 1183b50a0fe0SNeil Perrin 1184b24ab676SJeff Bonwick dsa->dsa_done(dsa->dsa_zgd, zio->io_error); 1185b24ab676SJeff Bonwick 1186b24ab676SJeff Bonwick kmem_free(dsa, sizeof (*dsa)); 1187b24ab676SJeff Bonwick } 1188b24ab676SJeff Bonwick 1189b24ab676SJeff Bonwick static void 1190b24ab676SJeff Bonwick dmu_sync_late_arrival_done(zio_t *zio) 1191b24ab676SJeff Bonwick { 1192b24ab676SJeff Bonwick blkptr_t *bp = zio->io_bp; 1193b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = zio->io_private; 1194b24ab676SJeff Bonwick 1195b24ab676SJeff Bonwick if (zio->io_error == 0 && !BP_IS_HOLE(bp)) { 1196b24ab676SJeff Bonwick ASSERT(zio->io_bp->blk_birth == zio->io_txg); 1197b24ab676SJeff Bonwick ASSERT(zio->io_txg > spa_syncing_txg(zio->io_spa)); 1198b24ab676SJeff Bonwick zio_free(zio->io_spa, zio->io_txg, zio->io_bp); 1199b24ab676SJeff Bonwick } 1200b24ab676SJeff Bonwick 1201b24ab676SJeff Bonwick dmu_tx_commit(dsa->dsa_tx); 1202b24ab676SJeff Bonwick 1203b24ab676SJeff Bonwick dsa->dsa_done(dsa->dsa_zgd, zio->io_error); 1204b24ab676SJeff Bonwick 1205b24ab676SJeff Bonwick kmem_free(dsa, sizeof (*dsa)); 1206b24ab676SJeff Bonwick } 1207b24ab676SJeff Bonwick 1208b24ab676SJeff Bonwick static int 1209b24ab676SJeff Bonwick dmu_sync_late_arrival(zio_t *pio, objset_t *os, dmu_sync_cb_t *done, zgd_t *zgd, 1210b24ab676SJeff Bonwick zio_prop_t *zp, zbookmark_t *zb) 1211b24ab676SJeff Bonwick { 1212b24ab676SJeff Bonwick dmu_sync_arg_t *dsa; 1213b24ab676SJeff Bonwick dmu_tx_t *tx; 1214b24ab676SJeff Bonwick 1215b24ab676SJeff Bonwick tx = dmu_tx_create(os); 1216b24ab676SJeff Bonwick dmu_tx_hold_space(tx, zgd->zgd_db->db_size); 12176e1f5caaSNeil Perrin if (dmu_tx_assign(tx, TXG_WAIT) != 0) { 1218b24ab676SJeff Bonwick dmu_tx_abort(tx); 1219b24ab676SJeff Bonwick return (EIO); /* Make zl_get_data do txg_waited_synced() */ 1220b24ab676SJeff Bonwick } 1221b24ab676SJeff Bonwick 1222b24ab676SJeff Bonwick dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); 1223b24ab676SJeff Bonwick dsa->dsa_dr = NULL; 1224b24ab676SJeff Bonwick dsa->dsa_done = done; 1225b24ab676SJeff Bonwick dsa->dsa_zgd = zgd; 1226b24ab676SJeff Bonwick dsa->dsa_tx = tx; 1227c717a561Smaybee 1228b24ab676SJeff Bonwick zio_nowait(zio_write(pio, os->os_spa, dmu_tx_get_txg(tx), zgd->zgd_bp, 1229b24ab676SJeff Bonwick zgd->zgd_db->db_data, zgd->zgd_db->db_size, zp, 1230b24ab676SJeff Bonwick dmu_sync_late_arrival_ready, dmu_sync_late_arrival_done, dsa, 1231b24ab676SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, zb)); 1232b24ab676SJeff Bonwick 1233b24ab676SJeff Bonwick return (0); 1234c5c6ffa0Smaybee } 1235c5c6ffa0Smaybee 1236fa9e4066Sahrens /* 1237c5c6ffa0Smaybee * Intent log support: sync the block associated with db to disk. 1238c5c6ffa0Smaybee * N.B. and XXX: the caller is responsible for making sure that the 1239c5c6ffa0Smaybee * data isn't changing while dmu_sync() is writing it. 1240fa9e4066Sahrens * 1241fa9e4066Sahrens * Return values: 1242fa9e4066Sahrens * 1243c5c6ffa0Smaybee * EEXIST: this txg has already been synced, so there's nothing to to. 1244fa9e4066Sahrens * The caller should not log the write. 1245fa9e4066Sahrens * 1246fa9e4066Sahrens * ENOENT: the block was dbuf_free_range()'d, so there's nothing to do. 1247fa9e4066Sahrens * The caller should not log the write. 1248fa9e4066Sahrens * 1249c5c6ffa0Smaybee * EALREADY: this block is already in the process of being synced. 1250c5c6ffa0Smaybee * The caller should track its progress (somehow). 1251fa9e4066Sahrens * 1252b24ab676SJeff Bonwick * EIO: could not do the I/O. 1253b24ab676SJeff Bonwick * The caller should do a txg_wait_synced(). 1254fa9e4066Sahrens * 1255b24ab676SJeff Bonwick * 0: the I/O has been initiated. 1256b24ab676SJeff Bonwick * The caller should log this blkptr in the done callback. 1257b24ab676SJeff Bonwick * It is possible that the I/O will fail, in which case 1258b24ab676SJeff Bonwick * the error will be reported to the done callback and 1259b24ab676SJeff Bonwick * propagated to pio from zio_done(). 1260fa9e4066Sahrens */ 1261fa9e4066Sahrens int 1262b24ab676SJeff Bonwick dmu_sync(zio_t *pio, uint64_t txg, dmu_sync_cb_t *done, zgd_t *zgd) 1263fa9e4066Sahrens { 1264b24ab676SJeff Bonwick blkptr_t *bp = zgd->zgd_bp; 1265b24ab676SJeff Bonwick dmu_buf_impl_t *db = (dmu_buf_impl_t *)zgd->zgd_db; 1266503ad85cSMatthew Ahrens objset_t *os = db->db_objset; 1267b24ab676SJeff Bonwick dsl_dataset_t *ds = os->os_dsl_dataset; 1268c717a561Smaybee dbuf_dirty_record_t *dr; 1269b24ab676SJeff Bonwick dmu_sync_arg_t *dsa; 1270ea8dc4b6Seschrock zbookmark_t zb; 1271b24ab676SJeff Bonwick zio_prop_t zp; 1272fa9e4066Sahrens 1273b24ab676SJeff Bonwick ASSERT(pio != NULL); 1274fa9e4066Sahrens ASSERT(BP_IS_HOLE(bp)); 1275fa9e4066Sahrens ASSERT(txg != 0); 1276fa9e4066Sahrens 1277b24ab676SJeff Bonwick SET_BOOKMARK(&zb, ds->ds_object, 1278b24ab676SJeff Bonwick db->db.db_object, db->db_level, db->db_blkid); 1279b24ab676SJeff Bonwick 1280b24ab676SJeff Bonwick dmu_write_policy(os, db->db_dnode, db->db_level, WP_DMU_SYNC, &zp); 1281fa9e4066Sahrens 1282ea8dc4b6Seschrock /* 1283b24ab676SJeff Bonwick * If we're frozen (running ziltest), we always need to generate a bp. 1284ea8dc4b6Seschrock */ 1285b24ab676SJeff Bonwick if (txg > spa_freeze_txg(os->os_spa)) 1286b24ab676SJeff Bonwick return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); 1287ea8dc4b6Seschrock 1288fa9e4066Sahrens /* 1289b24ab676SJeff Bonwick * Grabbing db_mtx now provides a barrier between dbuf_sync_leaf() 1290b24ab676SJeff Bonwick * and us. If we determine that this txg is not yet syncing, 1291b24ab676SJeff Bonwick * but it begins to sync a moment later, that's OK because the 1292b24ab676SJeff Bonwick * sync thread will block in dbuf_sync_leaf() until we drop db_mtx. 1293fa9e4066Sahrens */ 1294b24ab676SJeff Bonwick mutex_enter(&db->db_mtx); 1295b24ab676SJeff Bonwick 1296b24ab676SJeff Bonwick if (txg <= spa_last_synced_txg(os->os_spa)) { 1297fa9e4066Sahrens /* 1298b24ab676SJeff Bonwick * This txg has already synced. There's nothing to do. 1299fa9e4066Sahrens */ 1300b24ab676SJeff Bonwick mutex_exit(&db->db_mtx); 1301c5c6ffa0Smaybee return (EEXIST); 1302fa9e4066Sahrens } 1303fa9e4066Sahrens 1304b24ab676SJeff Bonwick if (txg <= spa_syncing_txg(os->os_spa)) { 1305b24ab676SJeff Bonwick /* 1306b24ab676SJeff Bonwick * This txg is currently syncing, so we can't mess with 1307b24ab676SJeff Bonwick * the dirty record anymore; just write a new log block. 1308b24ab676SJeff Bonwick */ 1309b24ab676SJeff Bonwick mutex_exit(&db->db_mtx); 1310b24ab676SJeff Bonwick return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); 1311fa9e4066Sahrens } 1312fa9e4066Sahrens 1313c717a561Smaybee dr = db->db_last_dirty; 1314b24ab676SJeff Bonwick while (dr && dr->dr_txg != txg) 1315c717a561Smaybee dr = dr->dr_next; 1316b24ab676SJeff Bonwick 1317b24ab676SJeff Bonwick if (dr == NULL) { 1318c5c6ffa0Smaybee /* 1319b24ab676SJeff Bonwick * There's no dr for this dbuf, so it must have been freed. 1320c5c6ffa0Smaybee * There's no need to log writes to freed blocks, so we're done. 1321c5c6ffa0Smaybee */ 1322c5c6ffa0Smaybee mutex_exit(&db->db_mtx); 1323c5c6ffa0Smaybee return (ENOENT); 1324c5c6ffa0Smaybee } 1325c5c6ffa0Smaybee 1326c717a561Smaybee ASSERT(dr->dr_txg == txg); 1327b24ab676SJeff Bonwick if (dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC || 1328b24ab676SJeff Bonwick dr->dt.dl.dr_override_state == DR_OVERRIDDEN) { 1329c717a561Smaybee /* 1330b24ab676SJeff Bonwick * We have already issued a sync write for this buffer, 1331b24ab676SJeff Bonwick * or this buffer has already been synced. It could not 1332c717a561Smaybee * have been dirtied since, or we would have cleared the state. 1333c717a561Smaybee */ 1334c717a561Smaybee mutex_exit(&db->db_mtx); 1335b24ab676SJeff Bonwick return (EALREADY); 1336c717a561Smaybee } 1337c717a561Smaybee 1338b24ab676SJeff Bonwick ASSERT(dr->dt.dl.dr_override_state == DR_NOT_OVERRIDDEN); 1339c717a561Smaybee dr->dt.dl.dr_override_state = DR_IN_DMU_SYNC; 1340fa9e4066Sahrens mutex_exit(&db->db_mtx); 1341e14bb325SJeff Bonwick 1342b24ab676SJeff Bonwick dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); 1343b24ab676SJeff Bonwick dsa->dsa_dr = dr; 1344b24ab676SJeff Bonwick dsa->dsa_done = done; 1345b24ab676SJeff Bonwick dsa->dsa_zgd = zgd; 1346b24ab676SJeff Bonwick dsa->dsa_tx = NULL; 1347e14bb325SJeff Bonwick 1348b24ab676SJeff Bonwick zio_nowait(arc_write(pio, os->os_spa, txg, 1349b24ab676SJeff Bonwick bp, dr->dt.dl.dr_data, DBUF_IS_L2CACHEABLE(db), &zp, 1350b24ab676SJeff Bonwick dmu_sync_ready, dmu_sync_done, dsa, 1351b24ab676SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, &zb)); 1352e14bb325SJeff Bonwick 1353b24ab676SJeff Bonwick return (0); 1354fa9e4066Sahrens } 1355fa9e4066Sahrens 1356fa9e4066Sahrens int 1357fa9e4066Sahrens dmu_object_set_blocksize(objset_t *os, uint64_t object, uint64_t size, int ibs, 1358fa9e4066Sahrens dmu_tx_t *tx) 1359fa9e4066Sahrens { 1360ea8dc4b6Seschrock dnode_t *dn; 1361ea8dc4b6Seschrock int err; 1362ea8dc4b6Seschrock 1363503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1364ea8dc4b6Seschrock if (err) 1365ea8dc4b6Seschrock return (err); 1366ea8dc4b6Seschrock err = dnode_set_blksz(dn, size, ibs, tx); 1367fa9e4066Sahrens dnode_rele(dn, FTAG); 1368fa9e4066Sahrens return (err); 1369fa9e4066Sahrens } 1370fa9e4066Sahrens 1371fa9e4066Sahrens void 1372fa9e4066Sahrens dmu_object_set_checksum(objset_t *os, uint64_t object, uint8_t checksum, 1373fa9e4066Sahrens dmu_tx_t *tx) 1374fa9e4066Sahrens { 1375ea8dc4b6Seschrock dnode_t *dn; 1376ea8dc4b6Seschrock 1377ea8dc4b6Seschrock /* XXX assumes dnode_hold will not get an i/o error */ 1378503ad85cSMatthew Ahrens (void) dnode_hold(os, object, FTAG, &dn); 1379fa9e4066Sahrens ASSERT(checksum < ZIO_CHECKSUM_FUNCTIONS); 1380fa9e4066Sahrens dn->dn_checksum = checksum; 1381fa9e4066Sahrens dnode_setdirty(dn, tx); 1382fa9e4066Sahrens dnode_rele(dn, FTAG); 1383fa9e4066Sahrens } 1384fa9e4066Sahrens 1385fa9e4066Sahrens void 1386fa9e4066Sahrens dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress, 1387fa9e4066Sahrens dmu_tx_t *tx) 1388fa9e4066Sahrens { 1389ea8dc4b6Seschrock dnode_t *dn; 1390ea8dc4b6Seschrock 1391ea8dc4b6Seschrock /* XXX assumes dnode_hold will not get an i/o error */ 1392503ad85cSMatthew Ahrens (void) dnode_hold(os, object, FTAG, &dn); 1393fa9e4066Sahrens ASSERT(compress < ZIO_COMPRESS_FUNCTIONS); 1394fa9e4066Sahrens dn->dn_compress = compress; 1395fa9e4066Sahrens dnode_setdirty(dn, tx); 1396fa9e4066Sahrens dnode_rele(dn, FTAG); 1397fa9e4066Sahrens } 1398fa9e4066Sahrens 1399b24ab676SJeff Bonwick int zfs_mdcomp_disable = 0; 1400b24ab676SJeff Bonwick 1401b24ab676SJeff Bonwick void 1402b24ab676SJeff Bonwick dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp, zio_prop_t *zp) 1403b24ab676SJeff Bonwick { 1404b24ab676SJeff Bonwick dmu_object_type_t type = dn ? dn->dn_type : DMU_OT_OBJSET; 1405b24ab676SJeff Bonwick boolean_t ismd = (level > 0 || dmu_ot[type].ot_metadata); 1406b24ab676SJeff Bonwick enum zio_checksum checksum = os->os_checksum; 1407b24ab676SJeff Bonwick enum zio_compress compress = os->os_compress; 1408b24ab676SJeff Bonwick enum zio_checksum dedup_checksum = os->os_dedup_checksum; 1409b24ab676SJeff Bonwick boolean_t dedup; 1410b24ab676SJeff Bonwick boolean_t dedup_verify = os->os_dedup_verify; 1411b24ab676SJeff Bonwick int copies = os->os_copies; 1412b24ab676SJeff Bonwick 1413b24ab676SJeff Bonwick /* 1414b24ab676SJeff Bonwick * Determine checksum setting. 1415b24ab676SJeff Bonwick */ 1416b24ab676SJeff Bonwick if (ismd) { 1417b24ab676SJeff Bonwick /* 1418b24ab676SJeff Bonwick * Metadata always gets checksummed. If the data 1419b24ab676SJeff Bonwick * checksum is multi-bit correctable, and it's not a 1420b24ab676SJeff Bonwick * ZBT-style checksum, then it's suitable for metadata 1421b24ab676SJeff Bonwick * as well. Otherwise, the metadata checksum defaults 1422b24ab676SJeff Bonwick * to fletcher4. 1423b24ab676SJeff Bonwick */ 1424b24ab676SJeff Bonwick if (zio_checksum_table[checksum].ci_correctable < 1 || 14256e1f5caaSNeil Perrin zio_checksum_table[checksum].ci_eck) 1426b24ab676SJeff Bonwick checksum = ZIO_CHECKSUM_FLETCHER_4; 1427b24ab676SJeff Bonwick } else { 1428b24ab676SJeff Bonwick checksum = zio_checksum_select(dn->dn_checksum, checksum); 1429b24ab676SJeff Bonwick } 1430b24ab676SJeff Bonwick 1431b24ab676SJeff Bonwick /* 1432b24ab676SJeff Bonwick * Determine compression setting. 1433b24ab676SJeff Bonwick */ 1434b24ab676SJeff Bonwick if (ismd) { 1435b24ab676SJeff Bonwick /* 1436b24ab676SJeff Bonwick * XXX -- we should design a compression algorithm 1437b24ab676SJeff Bonwick * that specializes in arrays of bps. 1438b24ab676SJeff Bonwick */ 1439b24ab676SJeff Bonwick compress = zfs_mdcomp_disable ? ZIO_COMPRESS_EMPTY : 1440b24ab676SJeff Bonwick ZIO_COMPRESS_LZJB; 1441b24ab676SJeff Bonwick } else { 1442b24ab676SJeff Bonwick compress = zio_compress_select(dn->dn_compress, compress); 1443b24ab676SJeff Bonwick } 1444b24ab676SJeff Bonwick 1445b24ab676SJeff Bonwick /* 1446b24ab676SJeff Bonwick * Determine dedup setting. If we are in dmu_sync(), we won't 1447b24ab676SJeff Bonwick * actually dedup now because that's all done in syncing context; 1448b24ab676SJeff Bonwick * but we do want to use the dedup checkum. If the checksum is not 1449b24ab676SJeff Bonwick * strong enough to ensure unique signatures, force dedup_verify. 1450b24ab676SJeff Bonwick */ 1451b24ab676SJeff Bonwick dedup = (!ismd && dedup_checksum != ZIO_CHECKSUM_OFF); 1452b24ab676SJeff Bonwick if (dedup) { 1453b24ab676SJeff Bonwick checksum = dedup_checksum; 1454b24ab676SJeff Bonwick if (!zio_checksum_table[checksum].ci_dedup) 1455b24ab676SJeff Bonwick dedup_verify = 1; 1456b24ab676SJeff Bonwick } 1457b24ab676SJeff Bonwick 1458b24ab676SJeff Bonwick if (wp & WP_DMU_SYNC) 1459b24ab676SJeff Bonwick dedup = 0; 1460b24ab676SJeff Bonwick 1461b24ab676SJeff Bonwick if (wp & WP_NOFILL) { 1462b24ab676SJeff Bonwick ASSERT(!ismd && level == 0); 1463b24ab676SJeff Bonwick checksum = ZIO_CHECKSUM_OFF; 1464b24ab676SJeff Bonwick compress = ZIO_COMPRESS_OFF; 1465b24ab676SJeff Bonwick dedup = B_FALSE; 1466b24ab676SJeff Bonwick } 1467b24ab676SJeff Bonwick 1468b24ab676SJeff Bonwick zp->zp_checksum = checksum; 1469b24ab676SJeff Bonwick zp->zp_compress = compress; 14700a586ceaSMark Shellenbaum zp->zp_type = (wp & WP_SPILL) ? dn->dn_bonustype : type; 1471b24ab676SJeff Bonwick zp->zp_level = level; 1472b24ab676SJeff Bonwick zp->zp_copies = MIN(copies + ismd, spa_max_replication(os->os_spa)); 1473b24ab676SJeff Bonwick zp->zp_dedup = dedup; 1474b24ab676SJeff Bonwick zp->zp_dedup_verify = dedup && dedup_verify; 1475b24ab676SJeff Bonwick } 1476b24ab676SJeff Bonwick 1477fa9e4066Sahrens int 1478fa9e4066Sahrens dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole, uint64_t *off) 1479fa9e4066Sahrens { 1480fa9e4066Sahrens dnode_t *dn; 1481fa9e4066Sahrens int i, err; 1482fa9e4066Sahrens 1483503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1484ea8dc4b6Seschrock if (err) 1485ea8dc4b6Seschrock return (err); 1486fa9e4066Sahrens /* 1487fa9e4066Sahrens * Sync any current changes before 1488fa9e4066Sahrens * we go trundling through the block pointers. 1489fa9e4066Sahrens */ 1490fa9e4066Sahrens for (i = 0; i < TXG_SIZE; i++) { 1491c543ec06Sahrens if (list_link_active(&dn->dn_dirty_link[i])) 1492fa9e4066Sahrens break; 1493fa9e4066Sahrens } 1494fa9e4066Sahrens if (i != TXG_SIZE) { 1495fa9e4066Sahrens dnode_rele(dn, FTAG); 1496fa9e4066Sahrens txg_wait_synced(dmu_objset_pool(os), 0); 1497503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1498ea8dc4b6Seschrock if (err) 1499ea8dc4b6Seschrock return (err); 1500fa9e4066Sahrens } 1501fa9e4066Sahrens 1502cdb0ab79Smaybee err = dnode_next_offset(dn, (hole ? DNODE_FIND_HOLE : 0), off, 1, 1, 0); 1503fa9e4066Sahrens dnode_rele(dn, FTAG); 1504fa9e4066Sahrens 1505fa9e4066Sahrens return (err); 1506fa9e4066Sahrens } 1507fa9e4066Sahrens 1508fa9e4066Sahrens void 1509fa9e4066Sahrens dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi) 1510fa9e4066Sahrens { 1511b24ab676SJeff Bonwick dnode_phys_t *dnp; 1512b24ab676SJeff Bonwick 1513fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 1514fa9e4066Sahrens mutex_enter(&dn->dn_mtx); 1515fa9e4066Sahrens 1516b24ab676SJeff Bonwick dnp = dn->dn_phys; 1517b24ab676SJeff Bonwick 1518fa9e4066Sahrens doi->doi_data_block_size = dn->dn_datablksz; 1519fa9e4066Sahrens doi->doi_metadata_block_size = dn->dn_indblkshift ? 1520fa9e4066Sahrens 1ULL << dn->dn_indblkshift : 0; 1521b24ab676SJeff Bonwick doi->doi_type = dn->dn_type; 1522b24ab676SJeff Bonwick doi->doi_bonus_type = dn->dn_bonustype; 1523b24ab676SJeff Bonwick doi->doi_bonus_size = dn->dn_bonuslen; 1524fa9e4066Sahrens doi->doi_indirection = dn->dn_nlevels; 1525fa9e4066Sahrens doi->doi_checksum = dn->dn_checksum; 1526fa9e4066Sahrens doi->doi_compress = dn->dn_compress; 1527b24ab676SJeff Bonwick doi->doi_physical_blocks_512 = (DN_USED_BYTES(dnp) + 256) >> 9; 1528b24ab676SJeff Bonwick doi->doi_max_offset = (dnp->dn_maxblkid + 1) * dn->dn_datablksz; 1529b24ab676SJeff Bonwick doi->doi_fill_count = 0; 1530b24ab676SJeff Bonwick for (int i = 0; i < dnp->dn_nblkptr; i++) 1531b24ab676SJeff Bonwick doi->doi_fill_count += dnp->dn_blkptr[i].blk_fill; 1532fa9e4066Sahrens 1533fa9e4066Sahrens mutex_exit(&dn->dn_mtx); 1534fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 1535fa9e4066Sahrens } 1536fa9e4066Sahrens 1537fa9e4066Sahrens /* 1538fa9e4066Sahrens * Get information on a DMU object. 1539fa9e4066Sahrens * If doi is NULL, just indicates whether the object exists. 1540fa9e4066Sahrens */ 1541fa9e4066Sahrens int 1542fa9e4066Sahrens dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi) 1543fa9e4066Sahrens { 1544ea8dc4b6Seschrock dnode_t *dn; 1545503ad85cSMatthew Ahrens int err = dnode_hold(os, object, FTAG, &dn); 1546fa9e4066Sahrens 1547ea8dc4b6Seschrock if (err) 1548ea8dc4b6Seschrock return (err); 1549fa9e4066Sahrens 1550fa9e4066Sahrens if (doi != NULL) 1551fa9e4066Sahrens dmu_object_info_from_dnode(dn, doi); 1552fa9e4066Sahrens 1553fa9e4066Sahrens dnode_rele(dn, FTAG); 1554fa9e4066Sahrens return (0); 1555fa9e4066Sahrens } 1556fa9e4066Sahrens 1557fa9e4066Sahrens /* 1558fa9e4066Sahrens * As above, but faster; can be used when you have a held dbuf in hand. 1559fa9e4066Sahrens */ 1560fa9e4066Sahrens void 1561fa9e4066Sahrens dmu_object_info_from_db(dmu_buf_t *db, dmu_object_info_t *doi) 1562fa9e4066Sahrens { 1563fa9e4066Sahrens dmu_object_info_from_dnode(((dmu_buf_impl_t *)db)->db_dnode, doi); 1564fa9e4066Sahrens } 1565fa9e4066Sahrens 1566fa9e4066Sahrens /* 1567fa9e4066Sahrens * Faster still when you only care about the size. 1568fa9e4066Sahrens * This is specifically optimized for zfs_getattr(). 1569fa9e4066Sahrens */ 1570fa9e4066Sahrens void 1571fa9e4066Sahrens dmu_object_size_from_db(dmu_buf_t *db, uint32_t *blksize, u_longlong_t *nblk512) 1572fa9e4066Sahrens { 1573fa9e4066Sahrens dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 1574fa9e4066Sahrens 1575fa9e4066Sahrens *blksize = dn->dn_datablksz; 157699653d4eSeschrock /* add 1 for dnode space */ 157799653d4eSeschrock *nblk512 = ((DN_USED_BYTES(dn->dn_phys) + SPA_MINBLOCKSIZE/2) >> 157899653d4eSeschrock SPA_MINBLOCKSHIFT) + 1; 1579fa9e4066Sahrens } 1580fa9e4066Sahrens 1581fa9e4066Sahrens void 1582fa9e4066Sahrens byteswap_uint64_array(void *vbuf, size_t size) 1583fa9e4066Sahrens { 1584fa9e4066Sahrens uint64_t *buf = vbuf; 1585fa9e4066Sahrens size_t count = size >> 3; 1586fa9e4066Sahrens int i; 1587fa9e4066Sahrens 1588fa9e4066Sahrens ASSERT((size & 7) == 0); 1589fa9e4066Sahrens 1590fa9e4066Sahrens for (i = 0; i < count; i++) 1591fa9e4066Sahrens buf[i] = BSWAP_64(buf[i]); 1592fa9e4066Sahrens } 1593fa9e4066Sahrens 1594fa9e4066Sahrens void 1595fa9e4066Sahrens byteswap_uint32_array(void *vbuf, size_t size) 1596fa9e4066Sahrens { 1597fa9e4066Sahrens uint32_t *buf = vbuf; 1598fa9e4066Sahrens size_t count = size >> 2; 1599fa9e4066Sahrens int i; 1600fa9e4066Sahrens 1601fa9e4066Sahrens ASSERT((size & 3) == 0); 1602fa9e4066Sahrens 1603fa9e4066Sahrens for (i = 0; i < count; i++) 1604fa9e4066Sahrens buf[i] = BSWAP_32(buf[i]); 1605fa9e4066Sahrens } 1606fa9e4066Sahrens 1607fa9e4066Sahrens void 1608fa9e4066Sahrens byteswap_uint16_array(void *vbuf, size_t size) 1609fa9e4066Sahrens { 1610fa9e4066Sahrens uint16_t *buf = vbuf; 1611fa9e4066Sahrens size_t count = size >> 1; 1612fa9e4066Sahrens int i; 1613fa9e4066Sahrens 1614fa9e4066Sahrens ASSERT((size & 1) == 0); 1615fa9e4066Sahrens 1616fa9e4066Sahrens for (i = 0; i < count; i++) 1617fa9e4066Sahrens buf[i] = BSWAP_16(buf[i]); 1618fa9e4066Sahrens } 1619fa9e4066Sahrens 1620fa9e4066Sahrens /* ARGSUSED */ 1621fa9e4066Sahrens void 1622fa9e4066Sahrens byteswap_uint8_array(void *vbuf, size_t size) 1623fa9e4066Sahrens { 1624fa9e4066Sahrens } 1625fa9e4066Sahrens 1626fa9e4066Sahrens void 1627fa9e4066Sahrens dmu_init(void) 1628fa9e4066Sahrens { 1629fa9e4066Sahrens dbuf_init(); 1630fa9e4066Sahrens dnode_init(); 16317cbf8b43SRich Morris zfetch_init(); 1632fa9e4066Sahrens arc_init(); 1633fa94a07fSbrendan l2arc_init(); 1634c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_init(); 16350a586ceaSMark Shellenbaum sa_cache_init(); 1636fa9e4066Sahrens } 1637fa9e4066Sahrens 1638fa9e4066Sahrens void 1639fa9e4066Sahrens dmu_fini(void) 1640fa9e4066Sahrens { 1641fa9e4066Sahrens arc_fini(); 16427cbf8b43SRich Morris zfetch_fini(); 1643fa9e4066Sahrens dnode_fini(); 1644fa9e4066Sahrens dbuf_fini(); 1645fa94a07fSbrendan l2arc_fini(); 1646c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_fini(); 16470a586ceaSMark Shellenbaum sa_cache_fini(); 1648fa9e4066Sahrens } 1649