1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 22*94d1a210STim 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); 1710a586ceaSMark Shellenbaum dnode_rele(dn, FTAG); 1720a586ceaSMark Shellenbaum return (error); 1730a586ceaSMark Shellenbaum } 1740a586ceaSMark Shellenbaum 175fa9e4066Sahrens /* 176ea8dc4b6Seschrock * returns ENOENT, EIO, or 0. 177fa9e4066Sahrens */ 178ea8dc4b6Seschrock int 179ea8dc4b6Seschrock dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **dbp) 180fa9e4066Sahrens { 181ea8dc4b6Seschrock dnode_t *dn; 182fa9e4066Sahrens dmu_buf_impl_t *db; 1831934e92fSmaybee int error; 184fa9e4066Sahrens 185503ad85cSMatthew Ahrens error = dnode_hold(os, object, FTAG, &dn); 1861934e92fSmaybee if (error) 1871934e92fSmaybee return (error); 188fa9e4066Sahrens 189ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_READER); 190ea8dc4b6Seschrock if (dn->dn_bonus == NULL) { 191fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 192ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 193ea8dc4b6Seschrock if (dn->dn_bonus == NULL) 1941934e92fSmaybee dbuf_create_bonus(dn); 195fa9e4066Sahrens } 196ea8dc4b6Seschrock db = dn->dn_bonus; 197ea8dc4b6Seschrock rw_exit(&dn->dn_struct_rwlock); 1981934e92fSmaybee 1991934e92fSmaybee /* as long as the bonus buf is held, the dnode will be held */ 2001934e92fSmaybee if (refcount_add(&db->db_holds, tag) == 1) 2011934e92fSmaybee VERIFY(dnode_add_ref(dn, db)); 2021934e92fSmaybee 203fa9e4066Sahrens dnode_rele(dn, FTAG); 204ea8dc4b6Seschrock 205ea8dc4b6Seschrock VERIFY(0 == dbuf_read(db, NULL, DB_RF_MUST_SUCCEED)); 206ea8dc4b6Seschrock 207ea8dc4b6Seschrock *dbp = &db->db; 208ea8dc4b6Seschrock return (0); 209fa9e4066Sahrens } 210fa9e4066Sahrens 2110a586ceaSMark Shellenbaum /* 2120a586ceaSMark Shellenbaum * returns ENOENT, EIO, or 0. 2130a586ceaSMark Shellenbaum * 2140a586ceaSMark Shellenbaum * This interface will allocate a blank spill dbuf when a spill blk 2150a586ceaSMark Shellenbaum * doesn't already exist on the dnode. 2160a586ceaSMark Shellenbaum * 2170a586ceaSMark Shellenbaum * if you only want to find an already existing spill db, then 2180a586ceaSMark Shellenbaum * dmu_spill_hold_existing() should be used. 2190a586ceaSMark Shellenbaum */ 2200a586ceaSMark Shellenbaum int 2210a586ceaSMark Shellenbaum dmu_spill_hold_by_dnode(dnode_t *dn, uint32_t flags, void *tag, dmu_buf_t **dbp) 2220a586ceaSMark Shellenbaum { 2230a586ceaSMark Shellenbaum dmu_buf_impl_t *db = NULL; 2240a586ceaSMark Shellenbaum int err; 2250a586ceaSMark Shellenbaum 2260a586ceaSMark Shellenbaum if ((flags & DB_RF_HAVESTRUCT) == 0) 2270a586ceaSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_READER); 2280a586ceaSMark Shellenbaum 2290a586ceaSMark Shellenbaum db = dbuf_hold(dn, DMU_SPILL_BLKID, tag); 2300a586ceaSMark Shellenbaum 2310a586ceaSMark Shellenbaum if ((flags & DB_RF_HAVESTRUCT) == 0) 2320a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 2330a586ceaSMark Shellenbaum 2340a586ceaSMark Shellenbaum ASSERT(db != NULL); 2350a586ceaSMark Shellenbaum err = dbuf_read(db, NULL, DB_RF_MUST_SUCCEED | flags); 2360a586ceaSMark Shellenbaum *dbp = &db->db; 2370a586ceaSMark Shellenbaum return (err); 2380a586ceaSMark Shellenbaum } 2390a586ceaSMark Shellenbaum 2400a586ceaSMark Shellenbaum int 2410a586ceaSMark Shellenbaum dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) 2420a586ceaSMark Shellenbaum { 2430a586ceaSMark Shellenbaum dnode_t *dn = ((dmu_buf_impl_t *)bonus)->db_dnode; 2440a586ceaSMark Shellenbaum int err; 2450a586ceaSMark Shellenbaum 2460a586ceaSMark Shellenbaum if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_SA) 2470a586ceaSMark Shellenbaum return (EINVAL); 2480a586ceaSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_READER); 2490a586ceaSMark Shellenbaum 2500a586ceaSMark Shellenbaum if (!dn->dn_have_spill) { 2510a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 2520a586ceaSMark Shellenbaum return (ENOENT); 2530a586ceaSMark Shellenbaum } 2540a586ceaSMark Shellenbaum err = dmu_spill_hold_by_dnode(dn, DB_RF_HAVESTRUCT, tag, dbp); 2550a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 2560a586ceaSMark Shellenbaum return (err); 2570a586ceaSMark Shellenbaum } 2580a586ceaSMark Shellenbaum 2590a586ceaSMark Shellenbaum int 2600a586ceaSMark Shellenbaum dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) 2610a586ceaSMark Shellenbaum { 2620a586ceaSMark Shellenbaum return (dmu_spill_hold_by_dnode(((dmu_buf_impl_t *)bonus)->db_dnode, 2630a586ceaSMark Shellenbaum 0, tag, dbp)); 2640a586ceaSMark Shellenbaum } 2650a586ceaSMark Shellenbaum 26613506d1eSmaybee /* 26713506d1eSmaybee * Note: longer-term, we should modify all of the dmu_buf_*() interfaces 26813506d1eSmaybee * to take a held dnode rather than <os, object> -- the lookup is wasteful, 26913506d1eSmaybee * and can induce severe lock contention when writing to several files 27013506d1eSmaybee * whose dnodes are in the same block. 27113506d1eSmaybee */ 27213506d1eSmaybee static int 2737bfdf011SNeil Perrin dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset, uint64_t length, 2747bfdf011SNeil Perrin int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp, uint32_t flags) 275fa9e4066Sahrens { 27605715f94SMark Maybee dsl_pool_t *dp = NULL; 277fa9e4066Sahrens dmu_buf_t **dbp; 278fa9e4066Sahrens uint64_t blkid, nblks, i; 2797bfdf011SNeil Perrin uint32_t dbuf_flags; 280ea8dc4b6Seschrock int err; 281ea8dc4b6Seschrock zio_t *zio; 28205715f94SMark Maybee hrtime_t start; 283ea8dc4b6Seschrock 284ea8dc4b6Seschrock ASSERT(length <= DMU_MAX_ACCESS); 285fa9e4066Sahrens 286c87b8fc5SMark J Musante dbuf_flags = DB_RF_CANFAIL | DB_RF_NEVERWAIT | DB_RF_HAVESTRUCT; 2877bfdf011SNeil Perrin if (flags & DMU_READ_NO_PREFETCH || length > zfetch_array_rd_sz) 2887bfdf011SNeil Perrin dbuf_flags |= DB_RF_NOPREFETCH; 289ea8dc4b6Seschrock 290fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 291fa9e4066Sahrens if (dn->dn_datablkshift) { 292fa9e4066Sahrens int blkshift = dn->dn_datablkshift; 293fa9e4066Sahrens nblks = (P2ROUNDUP(offset+length, 1ULL<<blkshift) - 294b1b8ab34Slling P2ALIGN(offset, 1ULL<<blkshift)) >> blkshift; 295fa9e4066Sahrens } else { 2960125049cSahrens if (offset + length > dn->dn_datablksz) { 2970125049cSahrens zfs_panic_recover("zfs: accessing past end of object " 2980125049cSahrens "%llx/%llx (size=%u access=%llu+%llu)", 2990125049cSahrens (longlong_t)dn->dn_objset-> 3000125049cSahrens os_dsl_dataset->ds_object, 3010125049cSahrens (longlong_t)dn->dn_object, dn->dn_datablksz, 3020125049cSahrens (longlong_t)offset, (longlong_t)length); 303c87b8fc5SMark J Musante rw_exit(&dn->dn_struct_rwlock); 3040125049cSahrens return (EIO); 3050125049cSahrens } 306fa9e4066Sahrens nblks = 1; 307fa9e4066Sahrens } 308ea8dc4b6Seschrock dbp = kmem_zalloc(sizeof (dmu_buf_t *) * nblks, KM_SLEEP); 309fa9e4066Sahrens 31005715f94SMark Maybee if (dn->dn_objset->os_dsl_dataset) 31105715f94SMark Maybee dp = dn->dn_objset->os_dsl_dataset->ds_dir->dd_pool; 31205715f94SMark Maybee if (dp && dsl_pool_sync_context(dp)) 31305715f94SMark Maybee start = gethrtime(); 314e14bb325SJeff Bonwick zio = zio_root(dn->dn_objset->os_spa, NULL, NULL, ZIO_FLAG_CANFAIL); 315fa9e4066Sahrens blkid = dbuf_whichblock(dn, offset); 316fa9e4066Sahrens for (i = 0; i < nblks; i++) { 317ea8dc4b6Seschrock dmu_buf_impl_t *db = dbuf_hold(dn, blkid+i, tag); 318ea8dc4b6Seschrock if (db == NULL) { 319ea8dc4b6Seschrock rw_exit(&dn->dn_struct_rwlock); 320ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 321ea8dc4b6Seschrock zio_nowait(zio); 322ea8dc4b6Seschrock return (EIO); 323ea8dc4b6Seschrock } 324ea8dc4b6Seschrock /* initiate async i/o */ 32513506d1eSmaybee if (read) { 3267bfdf011SNeil Perrin (void) dbuf_read(db, zio, dbuf_flags); 327ea8dc4b6Seschrock } 328ea8dc4b6Seschrock dbp[i] = &db->db; 329fa9e4066Sahrens } 330fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 331fa9e4066Sahrens 332ea8dc4b6Seschrock /* wait for async i/o */ 333ea8dc4b6Seschrock err = zio_wait(zio); 33405715f94SMark Maybee /* track read overhead when we are in sync context */ 33505715f94SMark Maybee if (dp && dsl_pool_sync_context(dp)) 33605715f94SMark Maybee dp->dp_read_overhead += gethrtime() - start; 337ea8dc4b6Seschrock if (err) { 338ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 339ea8dc4b6Seschrock return (err); 340ea8dc4b6Seschrock } 341fa9e4066Sahrens 342ea8dc4b6Seschrock /* wait for other io to complete */ 343ea8dc4b6Seschrock if (read) { 344ea8dc4b6Seschrock for (i = 0; i < nblks; i++) { 345ea8dc4b6Seschrock dmu_buf_impl_t *db = (dmu_buf_impl_t *)dbp[i]; 346ea8dc4b6Seschrock mutex_enter(&db->db_mtx); 347ea8dc4b6Seschrock while (db->db_state == DB_READ || 348ea8dc4b6Seschrock db->db_state == DB_FILL) 349ea8dc4b6Seschrock cv_wait(&db->db_changed, &db->db_mtx); 350ea8dc4b6Seschrock if (db->db_state == DB_UNCACHED) 351ea8dc4b6Seschrock err = EIO; 352ea8dc4b6Seschrock mutex_exit(&db->db_mtx); 353ea8dc4b6Seschrock if (err) { 354ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 355ea8dc4b6Seschrock return (err); 356ea8dc4b6Seschrock } 357ea8dc4b6Seschrock } 358ea8dc4b6Seschrock } 359fa9e4066Sahrens 360ea8dc4b6Seschrock *numbufsp = nblks; 361ea8dc4b6Seschrock *dbpp = dbp; 362ea8dc4b6Seschrock return (0); 363fa9e4066Sahrens } 364fa9e4066Sahrens 365a2eea2e1Sahrens static int 36613506d1eSmaybee dmu_buf_hold_array(objset_t *os, uint64_t object, uint64_t offset, 36713506d1eSmaybee uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) 36813506d1eSmaybee { 36913506d1eSmaybee dnode_t *dn; 37013506d1eSmaybee int err; 37113506d1eSmaybee 372503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 37313506d1eSmaybee if (err) 37413506d1eSmaybee return (err); 37513506d1eSmaybee 37613506d1eSmaybee err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, 3777bfdf011SNeil Perrin numbufsp, dbpp, DMU_READ_PREFETCH); 37813506d1eSmaybee 37913506d1eSmaybee dnode_rele(dn, FTAG); 38013506d1eSmaybee 38113506d1eSmaybee return (err); 38213506d1eSmaybee } 38313506d1eSmaybee 38413506d1eSmaybee int 38513506d1eSmaybee dmu_buf_hold_array_by_bonus(dmu_buf_t *db, uint64_t offset, 38613506d1eSmaybee uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) 38713506d1eSmaybee { 38813506d1eSmaybee dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 38913506d1eSmaybee int err; 39013506d1eSmaybee 39113506d1eSmaybee err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, 3927bfdf011SNeil Perrin numbufsp, dbpp, DMU_READ_PREFETCH); 39313506d1eSmaybee 39413506d1eSmaybee return (err); 39513506d1eSmaybee } 39613506d1eSmaybee 397fa9e4066Sahrens void 398ea8dc4b6Seschrock dmu_buf_rele_array(dmu_buf_t **dbp_fake, int numbufs, void *tag) 399fa9e4066Sahrens { 400fa9e4066Sahrens int i; 401fa9e4066Sahrens dmu_buf_impl_t **dbp = (dmu_buf_impl_t **)dbp_fake; 402fa9e4066Sahrens 403fa9e4066Sahrens if (numbufs == 0) 404fa9e4066Sahrens return; 405fa9e4066Sahrens 406ea8dc4b6Seschrock for (i = 0; i < numbufs; i++) { 407ea8dc4b6Seschrock if (dbp[i]) 408ea8dc4b6Seschrock dbuf_rele(dbp[i], tag); 409ea8dc4b6Seschrock } 410fa9e4066Sahrens 411fa9e4066Sahrens kmem_free(dbp, sizeof (dmu_buf_t *) * numbufs); 412fa9e4066Sahrens } 413fa9e4066Sahrens 414fa9e4066Sahrens void 415fa9e4066Sahrens dmu_prefetch(objset_t *os, uint64_t object, uint64_t offset, uint64_t len) 416fa9e4066Sahrens { 417fa9e4066Sahrens dnode_t *dn; 418fa9e4066Sahrens uint64_t blkid; 419ea8dc4b6Seschrock int nblks, i, err; 420fa9e4066Sahrens 421416e0cd8Sek if (zfs_prefetch_disable) 422416e0cd8Sek return; 423416e0cd8Sek 424fa9e4066Sahrens if (len == 0) { /* they're interested in the bonus buffer */ 425503ad85cSMatthew Ahrens dn = os->os_meta_dnode; 426fa9e4066Sahrens 427fa9e4066Sahrens if (object == 0 || object >= DN_MAX_OBJECT) 428fa9e4066Sahrens return; 429fa9e4066Sahrens 430fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 431fa9e4066Sahrens blkid = dbuf_whichblock(dn, object * sizeof (dnode_phys_t)); 432fa9e4066Sahrens dbuf_prefetch(dn, blkid); 433fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 434fa9e4066Sahrens return; 435fa9e4066Sahrens } 436fa9e4066Sahrens 437fa9e4066Sahrens /* 438fa9e4066Sahrens * XXX - Note, if the dnode for the requested object is not 439fa9e4066Sahrens * already cached, we will do a *synchronous* read in the 440fa9e4066Sahrens * dnode_hold() call. The same is true for any indirects. 441fa9e4066Sahrens */ 442503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 443ea8dc4b6Seschrock if (err != 0) 444fa9e4066Sahrens return; 445fa9e4066Sahrens 446fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 447fa9e4066Sahrens if (dn->dn_datablkshift) { 448fa9e4066Sahrens int blkshift = dn->dn_datablkshift; 449fa9e4066Sahrens nblks = (P2ROUNDUP(offset+len, 1<<blkshift) - 450b1b8ab34Slling P2ALIGN(offset, 1<<blkshift)) >> blkshift; 451fa9e4066Sahrens } else { 452fa9e4066Sahrens nblks = (offset < dn->dn_datablksz); 453fa9e4066Sahrens } 454fa9e4066Sahrens 455fa9e4066Sahrens if (nblks != 0) { 456fa9e4066Sahrens blkid = dbuf_whichblock(dn, offset); 457fa9e4066Sahrens for (i = 0; i < nblks; i++) 458fa9e4066Sahrens dbuf_prefetch(dn, blkid+i); 459fa9e4066Sahrens } 460fa9e4066Sahrens 461fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 462fa9e4066Sahrens 463fa9e4066Sahrens dnode_rele(dn, FTAG); 464fa9e4066Sahrens } 465fa9e4066Sahrens 46676256205SMark Maybee /* 46776256205SMark Maybee * Get the next "chunk" of file data to free. We traverse the file from 46876256205SMark Maybee * the end so that the file gets shorter over time (if we crashes in the 46976256205SMark Maybee * middle, this will leave us in a better state). We find allocated file 47076256205SMark Maybee * data by simply searching the allocated level 1 indirects. 47176256205SMark Maybee */ 472cdb0ab79Smaybee static int 47376256205SMark Maybee get_next_chunk(dnode_t *dn, uint64_t *start, uint64_t limit) 474cdb0ab79Smaybee { 47576256205SMark Maybee uint64_t len = *start - limit; 47676256205SMark Maybee uint64_t blkcnt = 0; 47776256205SMark Maybee uint64_t maxblks = DMU_MAX_ACCESS / (1ULL << (dn->dn_indblkshift + 1)); 47876256205SMark Maybee uint64_t iblkrange = 4791c8564a7SMark Maybee dn->dn_datablksz * EPB(dn->dn_indblkshift, SPA_BLKPTRSHIFT); 480cdb0ab79Smaybee 48176256205SMark Maybee ASSERT(limit <= *start); 482cdb0ab79Smaybee 48376256205SMark Maybee if (len <= iblkrange * maxblks) { 48476256205SMark Maybee *start = limit; 485cdb0ab79Smaybee return (0); 486cdb0ab79Smaybee } 48776256205SMark Maybee ASSERT(ISP2(iblkrange)); 488cdb0ab79Smaybee 48976256205SMark Maybee while (*start > limit && blkcnt < maxblks) { 4901c8564a7SMark Maybee int err; 491cdb0ab79Smaybee 49276256205SMark Maybee /* find next allocated L1 indirect */ 493cdb0ab79Smaybee err = dnode_next_offset(dn, 49476256205SMark Maybee DNODE_FIND_BACKWARDS, start, 2, 1, 0); 495cdb0ab79Smaybee 49676256205SMark Maybee /* if there are no more, then we are done */ 49776256205SMark Maybee if (err == ESRCH) { 49876256205SMark Maybee *start = limit; 499cdb0ab79Smaybee return (0); 50076256205SMark Maybee } else if (err) { 501cdb0ab79Smaybee return (err); 50276256205SMark Maybee } 50376256205SMark Maybee blkcnt += 1; 50476256205SMark Maybee 50576256205SMark Maybee /* reset offset to end of "next" block back */ 50676256205SMark Maybee *start = P2ALIGN(*start, iblkrange); 50776256205SMark Maybee if (*start <= limit) 50876256205SMark Maybee *start = limit; 50976256205SMark Maybee else 51076256205SMark Maybee *start -= 1; 511cdb0ab79Smaybee } 512cdb0ab79Smaybee return (0); 513cdb0ab79Smaybee } 514cdb0ab79Smaybee 515cdb0ab79Smaybee static int 516cdb0ab79Smaybee dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset, 517cdb0ab79Smaybee uint64_t length, boolean_t free_dnode) 518cdb0ab79Smaybee { 519cdb0ab79Smaybee dmu_tx_t *tx; 520cdb0ab79Smaybee uint64_t object_size, start, end, len; 521cdb0ab79Smaybee boolean_t trunc = (length == DMU_OBJECT_END); 522cdb0ab79Smaybee int align, err; 523cdb0ab79Smaybee 524cdb0ab79Smaybee align = 1 << dn->dn_datablkshift; 525cdb0ab79Smaybee ASSERT(align > 0); 526cdb0ab79Smaybee object_size = align == 1 ? dn->dn_datablksz : 527cdb0ab79Smaybee (dn->dn_maxblkid + 1) << dn->dn_datablkshift; 528cdb0ab79Smaybee 52914843421SMatthew Ahrens end = offset + length; 53014843421SMatthew Ahrens if (trunc || end > object_size) 531cdb0ab79Smaybee end = object_size; 532cdb0ab79Smaybee if (end <= offset) 533cdb0ab79Smaybee return (0); 534cdb0ab79Smaybee length = end - offset; 535cdb0ab79Smaybee 536cdb0ab79Smaybee while (length) { 537cdb0ab79Smaybee start = end; 53814843421SMatthew Ahrens /* assert(offset <= start) */ 539cdb0ab79Smaybee err = get_next_chunk(dn, &start, offset); 540cdb0ab79Smaybee if (err) 541cdb0ab79Smaybee return (err); 542cdb0ab79Smaybee len = trunc ? DMU_OBJECT_END : end - start; 543cdb0ab79Smaybee 544cdb0ab79Smaybee tx = dmu_tx_create(os); 545cdb0ab79Smaybee dmu_tx_hold_free(tx, dn->dn_object, start, len); 546cdb0ab79Smaybee err = dmu_tx_assign(tx, TXG_WAIT); 547cdb0ab79Smaybee if (err) { 548cdb0ab79Smaybee dmu_tx_abort(tx); 549cdb0ab79Smaybee return (err); 550cdb0ab79Smaybee } 551cdb0ab79Smaybee 552cdb0ab79Smaybee dnode_free_range(dn, start, trunc ? -1 : len, tx); 553cdb0ab79Smaybee 5541c8564a7SMark Maybee if (start == 0 && free_dnode) { 5551c8564a7SMark Maybee ASSERT(trunc); 556cdb0ab79Smaybee dnode_free(dn, tx); 5571c8564a7SMark Maybee } 558cdb0ab79Smaybee 559cdb0ab79Smaybee length -= end - start; 560cdb0ab79Smaybee 561cdb0ab79Smaybee dmu_tx_commit(tx); 562cdb0ab79Smaybee end = start; 563cdb0ab79Smaybee } 564cdb0ab79Smaybee return (0); 565cdb0ab79Smaybee } 566cdb0ab79Smaybee 567cdb0ab79Smaybee int 568cdb0ab79Smaybee dmu_free_long_range(objset_t *os, uint64_t object, 569cdb0ab79Smaybee uint64_t offset, uint64_t length) 570cdb0ab79Smaybee { 571cdb0ab79Smaybee dnode_t *dn; 572cdb0ab79Smaybee int err; 573cdb0ab79Smaybee 574503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 575cdb0ab79Smaybee if (err != 0) 576cdb0ab79Smaybee return (err); 577cdb0ab79Smaybee err = dmu_free_long_range_impl(os, dn, offset, length, FALSE); 578cdb0ab79Smaybee dnode_rele(dn, FTAG); 579cdb0ab79Smaybee return (err); 580cdb0ab79Smaybee } 581cdb0ab79Smaybee 582cdb0ab79Smaybee int 583cdb0ab79Smaybee dmu_free_object(objset_t *os, uint64_t object) 584cdb0ab79Smaybee { 585cdb0ab79Smaybee dnode_t *dn; 586cdb0ab79Smaybee dmu_tx_t *tx; 587cdb0ab79Smaybee int err; 588cdb0ab79Smaybee 589503ad85cSMatthew Ahrens err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, 590cdb0ab79Smaybee FTAG, &dn); 591cdb0ab79Smaybee if (err != 0) 592cdb0ab79Smaybee return (err); 593cdb0ab79Smaybee if (dn->dn_nlevels == 1) { 594cdb0ab79Smaybee tx = dmu_tx_create(os); 595cdb0ab79Smaybee dmu_tx_hold_bonus(tx, object); 596cdb0ab79Smaybee dmu_tx_hold_free(tx, dn->dn_object, 0, DMU_OBJECT_END); 597cdb0ab79Smaybee err = dmu_tx_assign(tx, TXG_WAIT); 598cdb0ab79Smaybee if (err == 0) { 599cdb0ab79Smaybee dnode_free_range(dn, 0, DMU_OBJECT_END, tx); 600cdb0ab79Smaybee dnode_free(dn, tx); 601cdb0ab79Smaybee dmu_tx_commit(tx); 602cdb0ab79Smaybee } else { 603cdb0ab79Smaybee dmu_tx_abort(tx); 604cdb0ab79Smaybee } 605cdb0ab79Smaybee } else { 606cdb0ab79Smaybee err = dmu_free_long_range_impl(os, dn, 0, DMU_OBJECT_END, TRUE); 607cdb0ab79Smaybee } 608cdb0ab79Smaybee dnode_rele(dn, FTAG); 609cdb0ab79Smaybee return (err); 610cdb0ab79Smaybee } 611cdb0ab79Smaybee 612ea8dc4b6Seschrock int 613fa9e4066Sahrens dmu_free_range(objset_t *os, uint64_t object, uint64_t offset, 614fa9e4066Sahrens uint64_t size, dmu_tx_t *tx) 615fa9e4066Sahrens { 616ea8dc4b6Seschrock dnode_t *dn; 617503ad85cSMatthew Ahrens int err = dnode_hold(os, object, FTAG, &dn); 618ea8dc4b6Seschrock if (err) 619ea8dc4b6Seschrock return (err); 620fa9e4066Sahrens ASSERT(offset < UINT64_MAX); 621fa9e4066Sahrens ASSERT(size == -1ULL || size <= UINT64_MAX - offset); 622fa9e4066Sahrens dnode_free_range(dn, offset, size, tx); 623fa9e4066Sahrens dnode_rele(dn, FTAG); 624ea8dc4b6Seschrock return (0); 625fa9e4066Sahrens } 626fa9e4066Sahrens 627ea8dc4b6Seschrock int 628ea8dc4b6Seschrock dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 6297bfdf011SNeil Perrin void *buf, uint32_t flags) 630fa9e4066Sahrens { 631fa9e4066Sahrens dnode_t *dn; 632fa9e4066Sahrens dmu_buf_t **dbp; 633c87b8fc5SMark J Musante int numbufs, err; 634fa9e4066Sahrens 635503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 636ea8dc4b6Seschrock if (err) 637ea8dc4b6Seschrock return (err); 638feb08c6bSbillm 639feb08c6bSbillm /* 640feb08c6bSbillm * Deal with odd block sizes, where there can't be data past the first 641feb08c6bSbillm * block. If we ever do the tail block optimization, we will need to 642feb08c6bSbillm * handle that here as well. 643feb08c6bSbillm */ 644c87b8fc5SMark J Musante if (dn->dn_maxblkid == 0) { 645fa9e4066Sahrens int newsz = offset > dn->dn_datablksz ? 0 : 646fa9e4066Sahrens MIN(size, dn->dn_datablksz - offset); 647fa9e4066Sahrens bzero((char *)buf + newsz, size - newsz); 648fa9e4066Sahrens size = newsz; 649fa9e4066Sahrens } 650fa9e4066Sahrens 651fa9e4066Sahrens while (size > 0) { 652fa9e4066Sahrens uint64_t mylen = MIN(size, DMU_MAX_ACCESS / 2); 653c87b8fc5SMark J Musante int i; 654fa9e4066Sahrens 655fa9e4066Sahrens /* 656fa9e4066Sahrens * NB: we could do this block-at-a-time, but it's nice 657fa9e4066Sahrens * to be reading in parallel. 658fa9e4066Sahrens */ 659a2eea2e1Sahrens err = dmu_buf_hold_array_by_dnode(dn, offset, mylen, 6607bfdf011SNeil Perrin TRUE, FTAG, &numbufs, &dbp, flags); 661ea8dc4b6Seschrock if (err) 6621934e92fSmaybee break; 663fa9e4066Sahrens 664fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 665fa9e4066Sahrens int tocpy; 666fa9e4066Sahrens int bufoff; 667fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 668fa9e4066Sahrens 669fa9e4066Sahrens ASSERT(size > 0); 670fa9e4066Sahrens 671fa9e4066Sahrens bufoff = offset - db->db_offset; 672fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 673fa9e4066Sahrens 674fa9e4066Sahrens bcopy((char *)db->db_data + bufoff, buf, tocpy); 675fa9e4066Sahrens 676fa9e4066Sahrens offset += tocpy; 677fa9e4066Sahrens size -= tocpy; 678fa9e4066Sahrens buf = (char *)buf + tocpy; 679fa9e4066Sahrens } 680ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 681fa9e4066Sahrens } 682a2eea2e1Sahrens dnode_rele(dn, FTAG); 6831934e92fSmaybee return (err); 684fa9e4066Sahrens } 685fa9e4066Sahrens 686fa9e4066Sahrens void 687fa9e4066Sahrens dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 688fa9e4066Sahrens const void *buf, dmu_tx_t *tx) 689fa9e4066Sahrens { 690fa9e4066Sahrens dmu_buf_t **dbp; 691fa9e4066Sahrens int numbufs, i; 692fa9e4066Sahrens 69313506d1eSmaybee if (size == 0) 69413506d1eSmaybee return; 69513506d1eSmaybee 696ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, 697ea8dc4b6Seschrock FALSE, FTAG, &numbufs, &dbp)); 698fa9e4066Sahrens 699fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 700fa9e4066Sahrens int tocpy; 701fa9e4066Sahrens int bufoff; 702fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 703fa9e4066Sahrens 704fa9e4066Sahrens ASSERT(size > 0); 705fa9e4066Sahrens 706fa9e4066Sahrens bufoff = offset - db->db_offset; 707fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 708fa9e4066Sahrens 709fa9e4066Sahrens ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 710fa9e4066Sahrens 711fa9e4066Sahrens if (tocpy == db->db_size) 712fa9e4066Sahrens dmu_buf_will_fill(db, tx); 713fa9e4066Sahrens else 714fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 715fa9e4066Sahrens 716fa9e4066Sahrens bcopy(buf, (char *)db->db_data + bufoff, tocpy); 717fa9e4066Sahrens 718fa9e4066Sahrens if (tocpy == db->db_size) 719fa9e4066Sahrens dmu_buf_fill_done(db, tx); 720fa9e4066Sahrens 721fa9e4066Sahrens offset += tocpy; 722fa9e4066Sahrens size -= tocpy; 723fa9e4066Sahrens buf = (char *)buf + tocpy; 724fa9e4066Sahrens } 725ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 726fa9e4066Sahrens } 727fa9e4066Sahrens 72882c9918fSTim Haley void 72982c9918fSTim Haley dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 73082c9918fSTim Haley dmu_tx_t *tx) 73182c9918fSTim Haley { 73282c9918fSTim Haley dmu_buf_t **dbp; 73382c9918fSTim Haley int numbufs, i; 73482c9918fSTim Haley 73582c9918fSTim Haley if (size == 0) 73682c9918fSTim Haley return; 73782c9918fSTim Haley 73882c9918fSTim Haley VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, 73982c9918fSTim Haley FALSE, FTAG, &numbufs, &dbp)); 74082c9918fSTim Haley 74182c9918fSTim Haley for (i = 0; i < numbufs; i++) { 74282c9918fSTim Haley dmu_buf_t *db = dbp[i]; 74382c9918fSTim Haley 74482c9918fSTim Haley dmu_buf_will_not_fill(db, tx); 74582c9918fSTim Haley } 74682c9918fSTim Haley dmu_buf_rele_array(dbp, numbufs, FTAG); 74782c9918fSTim Haley } 74882c9918fSTim Haley 749c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 750c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * DMU support for xuio 751c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 752c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_t *xuio_ksp = NULL; 753c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 754c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 755c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_init(xuio_t *xuio, int nblk) 756c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 757c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv; 758c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 759c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 760c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_iovcnt = nblk; 761c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_iov = kmem_zalloc(nblk * sizeof (iovec_t), KM_SLEEP); 762c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 763c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv = kmem_zalloc(sizeof (dmu_xuio_t), KM_SLEEP); 764c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->cnt = nblk; 765c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs = kmem_zalloc(nblk * sizeof (arc_buf_t *), KM_SLEEP); 766c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->iovp = uio->uio_iov; 767c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIO_XUZC_PRIV(xuio) = priv; 768c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 769c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (XUIO_XUZC_RW(xuio) == UIO_READ) 770c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_rbuf, nblk); 771c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 772c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_wbuf, nblk); 773c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 774c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 775c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 776c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 777c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 778c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_fini(xuio_t *xuio) 779c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 780c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 781c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int nblk = priv->cnt; 782c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 783c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv->iovp, nblk * sizeof (iovec_t)); 784c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv->bufs, nblk * sizeof (arc_buf_t *)); 785c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv, sizeof (dmu_xuio_t)); 786c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 787c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (XUIO_XUZC_RW(xuio) == UIO_READ) 788c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_rbuf, -nblk); 789c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 790c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_wbuf, -nblk); 791c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 792c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 793c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 794c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Initialize iov[priv->next] and priv->bufs[priv->next] with { off, n, abuf } 795c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * and increase priv->next by 1. 796c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 797c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 798c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_add(xuio_t *xuio, arc_buf_t *abuf, offset_t off, size_t n) 799c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 800c242f9a0Schunli zhang - Sun Microsystems - Irvine United States struct iovec *iov; 801c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 802c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 803c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int i = priv->next++; 804c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 805c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 806c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(off + n <= arc_buf_size(abuf)); 807c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov = uio->uio_iov + i; 808c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov->iov_base = (char *)abuf->b_data + off; 809c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov->iov_len = n; 810c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs[i] = abuf; 811c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 812c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 813c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 814c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 815c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_cnt(xuio_t *xuio) 816c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 817c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 818c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (priv->cnt); 819c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 820c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 821c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t * 822c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_arcbuf(xuio_t *xuio, int i) 823c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 824c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 825c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 826c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 827c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (priv->bufs[i]); 828c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 829c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 830c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 831c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_clear(xuio_t *xuio, int i) 832c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 833c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 834c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 835c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 836c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs[i] = NULL; 837c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 838c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 839c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static void 840c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_init(void) 841c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 842c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp = kstat_create("zfs", 0, "xuio_stats", "misc", 843c242f9a0Schunli zhang - Sun Microsystems - Irvine United States KSTAT_TYPE_NAMED, sizeof (xuio_stats) / sizeof (kstat_named_t), 844c242f9a0Schunli zhang - Sun Microsystems - Irvine United States KSTAT_FLAG_VIRTUAL); 845c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio_ksp != NULL) { 846c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp->ks_data = &xuio_stats; 847c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_install(xuio_ksp); 848c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 849c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 850c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 851c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static void 852c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_fini(void) 853c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 854c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio_ksp != NULL) { 855c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_delete(xuio_ksp); 856c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp = NULL; 857c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 858c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 859c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 860c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 861c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_wbuf_copied() 862c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 863c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_copied); 864c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 865c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 866c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 867c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_wbuf_nocopy() 868c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 869c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_nocopy); 870c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 871c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 872fa9e4066Sahrens #ifdef _KERNEL 873fa9e4066Sahrens int 874feb08c6bSbillm dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size) 875feb08c6bSbillm { 876feb08c6bSbillm dmu_buf_t **dbp; 877feb08c6bSbillm int numbufs, i, err; 878c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_t *xuio = NULL; 879feb08c6bSbillm 880feb08c6bSbillm /* 881feb08c6bSbillm * NB: we could do this block-at-a-time, but it's nice 882feb08c6bSbillm * to be reading in parallel. 883feb08c6bSbillm */ 884feb08c6bSbillm err = dmu_buf_hold_array(os, object, uio->uio_loffset, size, TRUE, FTAG, 885feb08c6bSbillm &numbufs, &dbp); 886feb08c6bSbillm if (err) 887feb08c6bSbillm return (err); 888feb08c6bSbillm 889c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (uio->uio_extflg == UIO_XUIO) 890c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio = (xuio_t *)uio; 891c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 892feb08c6bSbillm for (i = 0; i < numbufs; i++) { 893feb08c6bSbillm int tocpy; 894feb08c6bSbillm int bufoff; 895feb08c6bSbillm dmu_buf_t *db = dbp[i]; 896feb08c6bSbillm 897feb08c6bSbillm ASSERT(size > 0); 898feb08c6bSbillm 899feb08c6bSbillm bufoff = uio->uio_loffset - db->db_offset; 900feb08c6bSbillm tocpy = (int)MIN(db->db_size - bufoff, size); 901feb08c6bSbillm 902c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio) { 903c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db; 904c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *dbuf_abuf = dbi->db_buf; 905c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *abuf = dbuf_loan_arcbuf(dbi); 906c242f9a0Schunli zhang - Sun Microsystems - Irvine United States err = dmu_xuio_add(xuio, abuf, bufoff, tocpy); 907c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (!err) { 908c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_resid -= tocpy; 909c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_loffset += tocpy; 910c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 911c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 912c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (abuf == dbuf_abuf) 913c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_rbuf_nocopy); 914c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 915c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_rbuf_copied); 916c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else { 917c242f9a0Schunli zhang - Sun Microsystems - Irvine United States err = uiomove((char *)db->db_data + bufoff, tocpy, 918c242f9a0Schunli zhang - Sun Microsystems - Irvine United States UIO_READ, uio); 919c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 920feb08c6bSbillm if (err) 921feb08c6bSbillm break; 922feb08c6bSbillm 923feb08c6bSbillm size -= tocpy; 924feb08c6bSbillm } 925feb08c6bSbillm dmu_buf_rele_array(dbp, numbufs, FTAG); 926feb08c6bSbillm 927feb08c6bSbillm return (err); 928feb08c6bSbillm } 929feb08c6bSbillm 930*94d1a210STim Haley static int 931*94d1a210STim Haley dmu_write_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size, dmu_tx_t *tx) 932fa9e4066Sahrens { 933fa9e4066Sahrens dmu_buf_t **dbp; 934*94d1a210STim Haley int numbufs; 935fa9e4066Sahrens int err = 0; 936*94d1a210STim Haley int i; 937fa9e4066Sahrens 938*94d1a210STim Haley err = dmu_buf_hold_array_by_dnode(dn, uio->uio_loffset, size, 939*94d1a210STim Haley FALSE, FTAG, &numbufs, &dbp, DMU_READ_PREFETCH); 940ea8dc4b6Seschrock if (err) 941ea8dc4b6Seschrock return (err); 942fa9e4066Sahrens 943fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 944fa9e4066Sahrens int tocpy; 945fa9e4066Sahrens int bufoff; 946fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 947fa9e4066Sahrens 948fa9e4066Sahrens ASSERT(size > 0); 949fa9e4066Sahrens 950feb08c6bSbillm bufoff = uio->uio_loffset - db->db_offset; 951fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 952fa9e4066Sahrens 953fa9e4066Sahrens ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 954fa9e4066Sahrens 955fa9e4066Sahrens if (tocpy == db->db_size) 956fa9e4066Sahrens dmu_buf_will_fill(db, tx); 957fa9e4066Sahrens else 958fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 959fa9e4066Sahrens 960fa9e4066Sahrens /* 961fa9e4066Sahrens * XXX uiomove could block forever (eg. nfs-backed 962fa9e4066Sahrens * pages). There needs to be a uiolockdown() function 963fa9e4066Sahrens * to lock the pages in memory, so that uiomove won't 964fa9e4066Sahrens * block. 965fa9e4066Sahrens */ 966fa9e4066Sahrens err = uiomove((char *)db->db_data + bufoff, tocpy, 967fa9e4066Sahrens UIO_WRITE, uio); 968fa9e4066Sahrens 969fa9e4066Sahrens if (tocpy == db->db_size) 970fa9e4066Sahrens dmu_buf_fill_done(db, tx); 971fa9e4066Sahrens 972fa9e4066Sahrens if (err) 973fa9e4066Sahrens break; 974fa9e4066Sahrens 975fa9e4066Sahrens size -= tocpy; 976fa9e4066Sahrens } 977*94d1a210STim Haley 978ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 979fa9e4066Sahrens return (err); 980fa9e4066Sahrens } 98144eda4d7Smaybee 982*94d1a210STim Haley int 983*94d1a210STim Haley dmu_write_uio_dbuf(dmu_buf_t *zdb, uio_t *uio, uint64_t size, 984*94d1a210STim Haley dmu_tx_t *tx) 985*94d1a210STim Haley { 986*94d1a210STim Haley if (size == 0) 987*94d1a210STim Haley return (0); 988*94d1a210STim Haley 989*94d1a210STim Haley return (dmu_write_uio_dnode(((dmu_buf_impl_t *)zdb)->db_dnode, 990*94d1a210STim Haley uio, size, tx)); 991*94d1a210STim Haley } 992*94d1a210STim Haley 993*94d1a210STim Haley int 994*94d1a210STim Haley dmu_write_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size, 995*94d1a210STim Haley dmu_tx_t *tx) 996*94d1a210STim Haley { 997*94d1a210STim Haley dnode_t *dn; 998*94d1a210STim Haley int err; 999*94d1a210STim Haley 1000*94d1a210STim Haley if (size == 0) 1001*94d1a210STim Haley return (0); 1002*94d1a210STim Haley 1003*94d1a210STim Haley err = dnode_hold(os, object, FTAG, &dn); 1004*94d1a210STim Haley if (err) 1005*94d1a210STim Haley return (err); 1006*94d1a210STim Haley 1007*94d1a210STim Haley err = dmu_write_uio_dnode(dn, uio, size, tx); 1008*94d1a210STim Haley 1009*94d1a210STim Haley dnode_rele(dn, FTAG); 1010*94d1a210STim Haley 1011*94d1a210STim Haley return (err); 1012*94d1a210STim Haley } 1013*94d1a210STim Haley 101444eda4d7Smaybee int 101544eda4d7Smaybee dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 101644eda4d7Smaybee page_t *pp, dmu_tx_t *tx) 101744eda4d7Smaybee { 101844eda4d7Smaybee dmu_buf_t **dbp; 101944eda4d7Smaybee int numbufs, i; 102044eda4d7Smaybee int err; 102144eda4d7Smaybee 102244eda4d7Smaybee if (size == 0) 102344eda4d7Smaybee return (0); 102444eda4d7Smaybee 102544eda4d7Smaybee err = dmu_buf_hold_array(os, object, offset, size, 102644eda4d7Smaybee FALSE, FTAG, &numbufs, &dbp); 102744eda4d7Smaybee if (err) 102844eda4d7Smaybee return (err); 102944eda4d7Smaybee 103044eda4d7Smaybee for (i = 0; i < numbufs; i++) { 103144eda4d7Smaybee int tocpy, copied, thiscpy; 103244eda4d7Smaybee int bufoff; 103344eda4d7Smaybee dmu_buf_t *db = dbp[i]; 103444eda4d7Smaybee caddr_t va; 103544eda4d7Smaybee 103644eda4d7Smaybee ASSERT(size > 0); 103744eda4d7Smaybee ASSERT3U(db->db_size, >=, PAGESIZE); 103844eda4d7Smaybee 103944eda4d7Smaybee bufoff = offset - db->db_offset; 104044eda4d7Smaybee tocpy = (int)MIN(db->db_size - bufoff, size); 104144eda4d7Smaybee 104244eda4d7Smaybee ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 104344eda4d7Smaybee 104444eda4d7Smaybee if (tocpy == db->db_size) 104544eda4d7Smaybee dmu_buf_will_fill(db, tx); 104644eda4d7Smaybee else 104744eda4d7Smaybee dmu_buf_will_dirty(db, tx); 104844eda4d7Smaybee 104944eda4d7Smaybee for (copied = 0; copied < tocpy; copied += PAGESIZE) { 105044eda4d7Smaybee ASSERT3U(pp->p_offset, ==, db->db_offset + bufoff); 105144eda4d7Smaybee thiscpy = MIN(PAGESIZE, tocpy - copied); 10520fab61baSJonathan W Adams va = zfs_map_page(pp, S_READ); 105344eda4d7Smaybee bcopy(va, (char *)db->db_data + bufoff, thiscpy); 10540fab61baSJonathan W Adams zfs_unmap_page(pp, va); 105544eda4d7Smaybee pp = pp->p_next; 105644eda4d7Smaybee bufoff += PAGESIZE; 105744eda4d7Smaybee } 105844eda4d7Smaybee 105944eda4d7Smaybee if (tocpy == db->db_size) 106044eda4d7Smaybee dmu_buf_fill_done(db, tx); 106144eda4d7Smaybee 106244eda4d7Smaybee offset += tocpy; 106344eda4d7Smaybee size -= tocpy; 106444eda4d7Smaybee } 106544eda4d7Smaybee dmu_buf_rele_array(dbp, numbufs, FTAG); 106644eda4d7Smaybee return (err); 106744eda4d7Smaybee } 1068fa9e4066Sahrens #endif 1069fa9e4066Sahrens 10702fdbea25SAleksandr Guzovskiy /* 10712fdbea25SAleksandr Guzovskiy * Allocate a loaned anonymous arc buffer. 10722fdbea25SAleksandr Guzovskiy */ 10732fdbea25SAleksandr Guzovskiy arc_buf_t * 10742fdbea25SAleksandr Guzovskiy dmu_request_arcbuf(dmu_buf_t *handle, int size) 10752fdbea25SAleksandr Guzovskiy { 10762fdbea25SAleksandr Guzovskiy dnode_t *dn = ((dmu_buf_impl_t *)handle)->db_dnode; 10772fdbea25SAleksandr Guzovskiy 10782fdbea25SAleksandr Guzovskiy return (arc_loan_buf(dn->dn_objset->os_spa, size)); 10792fdbea25SAleksandr Guzovskiy } 10802fdbea25SAleksandr Guzovskiy 10812fdbea25SAleksandr Guzovskiy /* 10822fdbea25SAleksandr Guzovskiy * Free a loaned arc buffer. 10832fdbea25SAleksandr Guzovskiy */ 10842fdbea25SAleksandr Guzovskiy void 10852fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(arc_buf_t *buf) 10862fdbea25SAleksandr Guzovskiy { 10872fdbea25SAleksandr Guzovskiy arc_return_buf(buf, FTAG); 10882fdbea25SAleksandr Guzovskiy VERIFY(arc_buf_remove_ref(buf, FTAG) == 1); 10892fdbea25SAleksandr Guzovskiy } 10902fdbea25SAleksandr Guzovskiy 10912fdbea25SAleksandr Guzovskiy /* 10922fdbea25SAleksandr Guzovskiy * When possible directly assign passed loaned arc buffer to a dbuf. 10932fdbea25SAleksandr Guzovskiy * If this is not possible copy the contents of passed arc buf via 10942fdbea25SAleksandr Guzovskiy * dmu_write(). 10952fdbea25SAleksandr Guzovskiy */ 10962fdbea25SAleksandr Guzovskiy void 10972fdbea25SAleksandr Guzovskiy dmu_assign_arcbuf(dmu_buf_t *handle, uint64_t offset, arc_buf_t *buf, 10982fdbea25SAleksandr Guzovskiy dmu_tx_t *tx) 10992fdbea25SAleksandr Guzovskiy { 11002fdbea25SAleksandr Guzovskiy dnode_t *dn = ((dmu_buf_impl_t *)handle)->db_dnode; 11012fdbea25SAleksandr Guzovskiy dmu_buf_impl_t *db; 11022fdbea25SAleksandr Guzovskiy uint32_t blksz = (uint32_t)arc_buf_size(buf); 11032fdbea25SAleksandr Guzovskiy uint64_t blkid; 11042fdbea25SAleksandr Guzovskiy 11052fdbea25SAleksandr Guzovskiy rw_enter(&dn->dn_struct_rwlock, RW_READER); 11062fdbea25SAleksandr Guzovskiy blkid = dbuf_whichblock(dn, offset); 11072fdbea25SAleksandr Guzovskiy VERIFY((db = dbuf_hold(dn, blkid, FTAG)) != NULL); 11082fdbea25SAleksandr Guzovskiy rw_exit(&dn->dn_struct_rwlock); 11092fdbea25SAleksandr Guzovskiy 11102fdbea25SAleksandr Guzovskiy if (offset == db->db.db_offset && blksz == db->db.db_size) { 11112fdbea25SAleksandr Guzovskiy dbuf_assign_arcbuf(db, buf, tx); 11122fdbea25SAleksandr Guzovskiy dbuf_rele(db, FTAG); 11132fdbea25SAleksandr Guzovskiy } else { 11142fdbea25SAleksandr Guzovskiy dbuf_rele(db, FTAG); 1115503ad85cSMatthew Ahrens dmu_write(dn->dn_objset, dn->dn_object, offset, blksz, 11162fdbea25SAleksandr Guzovskiy buf->b_data, tx); 11172fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(buf); 1118c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_copied); 11192fdbea25SAleksandr Guzovskiy } 11202fdbea25SAleksandr Guzovskiy } 11212fdbea25SAleksandr Guzovskiy 1122c5c6ffa0Smaybee typedef struct { 1123b24ab676SJeff Bonwick dbuf_dirty_record_t *dsa_dr; 1124b24ab676SJeff Bonwick dmu_sync_cb_t *dsa_done; 1125b24ab676SJeff Bonwick zgd_t *dsa_zgd; 1126b24ab676SJeff Bonwick dmu_tx_t *dsa_tx; 1127c717a561Smaybee } dmu_sync_arg_t; 1128c5c6ffa0Smaybee 1129e14bb325SJeff Bonwick /* ARGSUSED */ 1130e14bb325SJeff Bonwick static void 1131e14bb325SJeff Bonwick dmu_sync_ready(zio_t *zio, arc_buf_t *buf, void *varg) 1132e14bb325SJeff Bonwick { 1133b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = varg; 1134b24ab676SJeff Bonwick dmu_buf_t *db = dsa->dsa_zgd->zgd_db; 1135b24ab676SJeff Bonwick dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 1136e14bb325SJeff Bonwick blkptr_t *bp = zio->io_bp; 1137975c32a0SNeil Perrin 1138b24ab676SJeff Bonwick if (zio->io_error == 0) { 1139b24ab676SJeff Bonwick if (BP_IS_HOLE(bp)) { 1140b24ab676SJeff Bonwick /* 1141b24ab676SJeff Bonwick * A block of zeros may compress to a hole, but the 1142b24ab676SJeff Bonwick * block size still needs to be known for replay. 1143b24ab676SJeff Bonwick */ 1144b24ab676SJeff Bonwick BP_SET_LSIZE(bp, db->db_size); 1145b24ab676SJeff Bonwick } else { 1146b24ab676SJeff Bonwick ASSERT(BP_GET_TYPE(bp) == dn->dn_type); 1147b24ab676SJeff Bonwick ASSERT(BP_GET_LEVEL(bp) == 0); 1148b24ab676SJeff Bonwick bp->blk_fill = 1; 1149b24ab676SJeff Bonwick } 1150e14bb325SJeff Bonwick } 1151e14bb325SJeff Bonwick } 1152e14bb325SJeff Bonwick 1153b24ab676SJeff Bonwick static void 1154b24ab676SJeff Bonwick dmu_sync_late_arrival_ready(zio_t *zio) 1155b24ab676SJeff Bonwick { 1156b24ab676SJeff Bonwick dmu_sync_ready(zio, NULL, zio->io_private); 1157b24ab676SJeff Bonwick } 1158b24ab676SJeff Bonwick 1159c5c6ffa0Smaybee /* ARGSUSED */ 1160c5c6ffa0Smaybee static void 1161c5c6ffa0Smaybee dmu_sync_done(zio_t *zio, arc_buf_t *buf, void *varg) 1162c5c6ffa0Smaybee { 1163b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = varg; 1164b24ab676SJeff Bonwick dbuf_dirty_record_t *dr = dsa->dsa_dr; 1165c717a561Smaybee dmu_buf_impl_t *db = dr->dr_dbuf; 1166c5c6ffa0Smaybee 1167b50a0fe0SNeil Perrin mutex_enter(&db->db_mtx); 1168b50a0fe0SNeil Perrin ASSERT(dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC); 1169b24ab676SJeff Bonwick if (zio->io_error == 0) { 1170b24ab676SJeff Bonwick dr->dt.dl.dr_overridden_by = *zio->io_bp; 1171b24ab676SJeff Bonwick dr->dt.dl.dr_override_state = DR_OVERRIDDEN; 1172b24ab676SJeff Bonwick dr->dt.dl.dr_copies = zio->io_prop.zp_copies; 1173b24ab676SJeff Bonwick if (BP_IS_HOLE(&dr->dt.dl.dr_overridden_by)) 1174b24ab676SJeff Bonwick BP_ZERO(&dr->dt.dl.dr_overridden_by); 1175b24ab676SJeff Bonwick } else { 1176b24ab676SJeff Bonwick dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN; 1177b24ab676SJeff Bonwick } 1178c5c6ffa0Smaybee cv_broadcast(&db->db_changed); 1179b50a0fe0SNeil Perrin mutex_exit(&db->db_mtx); 1180b50a0fe0SNeil Perrin 1181b24ab676SJeff Bonwick dsa->dsa_done(dsa->dsa_zgd, zio->io_error); 1182b24ab676SJeff Bonwick 1183b24ab676SJeff Bonwick kmem_free(dsa, sizeof (*dsa)); 1184b24ab676SJeff Bonwick } 1185b24ab676SJeff Bonwick 1186b24ab676SJeff Bonwick static void 1187b24ab676SJeff Bonwick dmu_sync_late_arrival_done(zio_t *zio) 1188b24ab676SJeff Bonwick { 1189b24ab676SJeff Bonwick blkptr_t *bp = zio->io_bp; 1190b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = zio->io_private; 1191b24ab676SJeff Bonwick 1192b24ab676SJeff Bonwick if (zio->io_error == 0 && !BP_IS_HOLE(bp)) { 1193b24ab676SJeff Bonwick ASSERT(zio->io_bp->blk_birth == zio->io_txg); 1194b24ab676SJeff Bonwick ASSERT(zio->io_txg > spa_syncing_txg(zio->io_spa)); 1195b24ab676SJeff Bonwick zio_free(zio->io_spa, zio->io_txg, zio->io_bp); 1196b24ab676SJeff Bonwick } 1197b24ab676SJeff Bonwick 1198b24ab676SJeff Bonwick dmu_tx_commit(dsa->dsa_tx); 1199b24ab676SJeff Bonwick 1200b24ab676SJeff Bonwick dsa->dsa_done(dsa->dsa_zgd, zio->io_error); 1201b24ab676SJeff Bonwick 1202b24ab676SJeff Bonwick kmem_free(dsa, sizeof (*dsa)); 1203b24ab676SJeff Bonwick } 1204b24ab676SJeff Bonwick 1205b24ab676SJeff Bonwick static int 1206b24ab676SJeff Bonwick dmu_sync_late_arrival(zio_t *pio, objset_t *os, dmu_sync_cb_t *done, zgd_t *zgd, 1207b24ab676SJeff Bonwick zio_prop_t *zp, zbookmark_t *zb) 1208b24ab676SJeff Bonwick { 1209b24ab676SJeff Bonwick dmu_sync_arg_t *dsa; 1210b24ab676SJeff Bonwick dmu_tx_t *tx; 1211b24ab676SJeff Bonwick 1212b24ab676SJeff Bonwick tx = dmu_tx_create(os); 1213b24ab676SJeff Bonwick dmu_tx_hold_space(tx, zgd->zgd_db->db_size); 12146e1f5caaSNeil Perrin if (dmu_tx_assign(tx, TXG_WAIT) != 0) { 1215b24ab676SJeff Bonwick dmu_tx_abort(tx); 1216b24ab676SJeff Bonwick return (EIO); /* Make zl_get_data do txg_waited_synced() */ 1217b24ab676SJeff Bonwick } 1218b24ab676SJeff Bonwick 1219b24ab676SJeff Bonwick dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); 1220b24ab676SJeff Bonwick dsa->dsa_dr = NULL; 1221b24ab676SJeff Bonwick dsa->dsa_done = done; 1222b24ab676SJeff Bonwick dsa->dsa_zgd = zgd; 1223b24ab676SJeff Bonwick dsa->dsa_tx = tx; 1224c717a561Smaybee 1225b24ab676SJeff Bonwick zio_nowait(zio_write(pio, os->os_spa, dmu_tx_get_txg(tx), zgd->zgd_bp, 1226b24ab676SJeff Bonwick zgd->zgd_db->db_data, zgd->zgd_db->db_size, zp, 1227b24ab676SJeff Bonwick dmu_sync_late_arrival_ready, dmu_sync_late_arrival_done, dsa, 1228b24ab676SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, zb)); 1229b24ab676SJeff Bonwick 1230b24ab676SJeff Bonwick return (0); 1231c5c6ffa0Smaybee } 1232c5c6ffa0Smaybee 1233fa9e4066Sahrens /* 1234c5c6ffa0Smaybee * Intent log support: sync the block associated with db to disk. 1235c5c6ffa0Smaybee * N.B. and XXX: the caller is responsible for making sure that the 1236c5c6ffa0Smaybee * data isn't changing while dmu_sync() is writing it. 1237fa9e4066Sahrens * 1238fa9e4066Sahrens * Return values: 1239fa9e4066Sahrens * 1240c5c6ffa0Smaybee * EEXIST: this txg has already been synced, so there's nothing to to. 1241fa9e4066Sahrens * The caller should not log the write. 1242fa9e4066Sahrens * 1243fa9e4066Sahrens * ENOENT: the block was dbuf_free_range()'d, so there's nothing to do. 1244fa9e4066Sahrens * The caller should not log the write. 1245fa9e4066Sahrens * 1246c5c6ffa0Smaybee * EALREADY: this block is already in the process of being synced. 1247c5c6ffa0Smaybee * The caller should track its progress (somehow). 1248fa9e4066Sahrens * 1249b24ab676SJeff Bonwick * EIO: could not do the I/O. 1250b24ab676SJeff Bonwick * The caller should do a txg_wait_synced(). 1251fa9e4066Sahrens * 1252b24ab676SJeff Bonwick * 0: the I/O has been initiated. 1253b24ab676SJeff Bonwick * The caller should log this blkptr in the done callback. 1254b24ab676SJeff Bonwick * It is possible that the I/O will fail, in which case 1255b24ab676SJeff Bonwick * the error will be reported to the done callback and 1256b24ab676SJeff Bonwick * propagated to pio from zio_done(). 1257fa9e4066Sahrens */ 1258fa9e4066Sahrens int 1259b24ab676SJeff Bonwick dmu_sync(zio_t *pio, uint64_t txg, dmu_sync_cb_t *done, zgd_t *zgd) 1260fa9e4066Sahrens { 1261b24ab676SJeff Bonwick blkptr_t *bp = zgd->zgd_bp; 1262b24ab676SJeff Bonwick dmu_buf_impl_t *db = (dmu_buf_impl_t *)zgd->zgd_db; 1263503ad85cSMatthew Ahrens objset_t *os = db->db_objset; 1264b24ab676SJeff Bonwick dsl_dataset_t *ds = os->os_dsl_dataset; 1265c717a561Smaybee dbuf_dirty_record_t *dr; 1266b24ab676SJeff Bonwick dmu_sync_arg_t *dsa; 1267ea8dc4b6Seschrock zbookmark_t zb; 1268b24ab676SJeff Bonwick zio_prop_t zp; 1269fa9e4066Sahrens 1270b24ab676SJeff Bonwick ASSERT(pio != NULL); 1271fa9e4066Sahrens ASSERT(BP_IS_HOLE(bp)); 1272fa9e4066Sahrens ASSERT(txg != 0); 1273fa9e4066Sahrens 1274b24ab676SJeff Bonwick SET_BOOKMARK(&zb, ds->ds_object, 1275b24ab676SJeff Bonwick db->db.db_object, db->db_level, db->db_blkid); 1276b24ab676SJeff Bonwick 1277b24ab676SJeff Bonwick dmu_write_policy(os, db->db_dnode, db->db_level, WP_DMU_SYNC, &zp); 1278fa9e4066Sahrens 1279ea8dc4b6Seschrock /* 1280b24ab676SJeff Bonwick * If we're frozen (running ziltest), we always need to generate a bp. 1281ea8dc4b6Seschrock */ 1282b24ab676SJeff Bonwick if (txg > spa_freeze_txg(os->os_spa)) 1283b24ab676SJeff Bonwick return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); 1284ea8dc4b6Seschrock 1285fa9e4066Sahrens /* 1286b24ab676SJeff Bonwick * Grabbing db_mtx now provides a barrier between dbuf_sync_leaf() 1287b24ab676SJeff Bonwick * and us. If we determine that this txg is not yet syncing, 1288b24ab676SJeff Bonwick * but it begins to sync a moment later, that's OK because the 1289b24ab676SJeff Bonwick * sync thread will block in dbuf_sync_leaf() until we drop db_mtx. 1290fa9e4066Sahrens */ 1291b24ab676SJeff Bonwick mutex_enter(&db->db_mtx); 1292b24ab676SJeff Bonwick 1293b24ab676SJeff Bonwick if (txg <= spa_last_synced_txg(os->os_spa)) { 1294fa9e4066Sahrens /* 1295b24ab676SJeff Bonwick * This txg has already synced. There's nothing to do. 1296fa9e4066Sahrens */ 1297b24ab676SJeff Bonwick mutex_exit(&db->db_mtx); 1298c5c6ffa0Smaybee return (EEXIST); 1299fa9e4066Sahrens } 1300fa9e4066Sahrens 1301b24ab676SJeff Bonwick if (txg <= spa_syncing_txg(os->os_spa)) { 1302b24ab676SJeff Bonwick /* 1303b24ab676SJeff Bonwick * This txg is currently syncing, so we can't mess with 1304b24ab676SJeff Bonwick * the dirty record anymore; just write a new log block. 1305b24ab676SJeff Bonwick */ 1306b24ab676SJeff Bonwick mutex_exit(&db->db_mtx); 1307b24ab676SJeff Bonwick return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); 1308fa9e4066Sahrens } 1309fa9e4066Sahrens 1310c717a561Smaybee dr = db->db_last_dirty; 1311b24ab676SJeff Bonwick while (dr && dr->dr_txg != txg) 1312c717a561Smaybee dr = dr->dr_next; 1313b24ab676SJeff Bonwick 1314b24ab676SJeff Bonwick if (dr == NULL) { 1315c5c6ffa0Smaybee /* 1316b24ab676SJeff Bonwick * There's no dr for this dbuf, so it must have been freed. 1317c5c6ffa0Smaybee * There's no need to log writes to freed blocks, so we're done. 1318c5c6ffa0Smaybee */ 1319c5c6ffa0Smaybee mutex_exit(&db->db_mtx); 1320c5c6ffa0Smaybee return (ENOENT); 1321c5c6ffa0Smaybee } 1322c5c6ffa0Smaybee 1323c717a561Smaybee ASSERT(dr->dr_txg == txg); 1324b24ab676SJeff Bonwick if (dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC || 1325b24ab676SJeff Bonwick dr->dt.dl.dr_override_state == DR_OVERRIDDEN) { 1326c717a561Smaybee /* 1327b24ab676SJeff Bonwick * We have already issued a sync write for this buffer, 1328b24ab676SJeff Bonwick * or this buffer has already been synced. It could not 1329c717a561Smaybee * have been dirtied since, or we would have cleared the state. 1330c717a561Smaybee */ 1331c717a561Smaybee mutex_exit(&db->db_mtx); 1332b24ab676SJeff Bonwick return (EALREADY); 1333c717a561Smaybee } 1334c717a561Smaybee 1335b24ab676SJeff Bonwick ASSERT(dr->dt.dl.dr_override_state == DR_NOT_OVERRIDDEN); 1336c717a561Smaybee dr->dt.dl.dr_override_state = DR_IN_DMU_SYNC; 1337fa9e4066Sahrens mutex_exit(&db->db_mtx); 1338e14bb325SJeff Bonwick 1339b24ab676SJeff Bonwick dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); 1340b24ab676SJeff Bonwick dsa->dsa_dr = dr; 1341b24ab676SJeff Bonwick dsa->dsa_done = done; 1342b24ab676SJeff Bonwick dsa->dsa_zgd = zgd; 1343b24ab676SJeff Bonwick dsa->dsa_tx = NULL; 1344e14bb325SJeff Bonwick 1345b24ab676SJeff Bonwick zio_nowait(arc_write(pio, os->os_spa, txg, 1346b24ab676SJeff Bonwick bp, dr->dt.dl.dr_data, DBUF_IS_L2CACHEABLE(db), &zp, 1347b24ab676SJeff Bonwick dmu_sync_ready, dmu_sync_done, dsa, 1348b24ab676SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, &zb)); 1349e14bb325SJeff Bonwick 1350b24ab676SJeff Bonwick return (0); 1351fa9e4066Sahrens } 1352fa9e4066Sahrens 1353fa9e4066Sahrens int 1354fa9e4066Sahrens dmu_object_set_blocksize(objset_t *os, uint64_t object, uint64_t size, int ibs, 1355fa9e4066Sahrens dmu_tx_t *tx) 1356fa9e4066Sahrens { 1357ea8dc4b6Seschrock dnode_t *dn; 1358ea8dc4b6Seschrock int err; 1359ea8dc4b6Seschrock 1360503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1361ea8dc4b6Seschrock if (err) 1362ea8dc4b6Seschrock return (err); 1363ea8dc4b6Seschrock err = dnode_set_blksz(dn, size, ibs, tx); 1364fa9e4066Sahrens dnode_rele(dn, FTAG); 1365fa9e4066Sahrens return (err); 1366fa9e4066Sahrens } 1367fa9e4066Sahrens 1368fa9e4066Sahrens void 1369fa9e4066Sahrens dmu_object_set_checksum(objset_t *os, uint64_t object, uint8_t checksum, 1370fa9e4066Sahrens dmu_tx_t *tx) 1371fa9e4066Sahrens { 1372ea8dc4b6Seschrock dnode_t *dn; 1373ea8dc4b6Seschrock 1374ea8dc4b6Seschrock /* XXX assumes dnode_hold will not get an i/o error */ 1375503ad85cSMatthew Ahrens (void) dnode_hold(os, object, FTAG, &dn); 1376fa9e4066Sahrens ASSERT(checksum < ZIO_CHECKSUM_FUNCTIONS); 1377fa9e4066Sahrens dn->dn_checksum = checksum; 1378fa9e4066Sahrens dnode_setdirty(dn, tx); 1379fa9e4066Sahrens dnode_rele(dn, FTAG); 1380fa9e4066Sahrens } 1381fa9e4066Sahrens 1382fa9e4066Sahrens void 1383fa9e4066Sahrens dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress, 1384fa9e4066Sahrens dmu_tx_t *tx) 1385fa9e4066Sahrens { 1386ea8dc4b6Seschrock dnode_t *dn; 1387ea8dc4b6Seschrock 1388ea8dc4b6Seschrock /* XXX assumes dnode_hold will not get an i/o error */ 1389503ad85cSMatthew Ahrens (void) dnode_hold(os, object, FTAG, &dn); 1390fa9e4066Sahrens ASSERT(compress < ZIO_COMPRESS_FUNCTIONS); 1391fa9e4066Sahrens dn->dn_compress = compress; 1392fa9e4066Sahrens dnode_setdirty(dn, tx); 1393fa9e4066Sahrens dnode_rele(dn, FTAG); 1394fa9e4066Sahrens } 1395fa9e4066Sahrens 1396b24ab676SJeff Bonwick int zfs_mdcomp_disable = 0; 1397b24ab676SJeff Bonwick 1398b24ab676SJeff Bonwick void 1399b24ab676SJeff Bonwick dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp, zio_prop_t *zp) 1400b24ab676SJeff Bonwick { 1401b24ab676SJeff Bonwick dmu_object_type_t type = dn ? dn->dn_type : DMU_OT_OBJSET; 1402b24ab676SJeff Bonwick boolean_t ismd = (level > 0 || dmu_ot[type].ot_metadata); 1403b24ab676SJeff Bonwick enum zio_checksum checksum = os->os_checksum; 1404b24ab676SJeff Bonwick enum zio_compress compress = os->os_compress; 1405b24ab676SJeff Bonwick enum zio_checksum dedup_checksum = os->os_dedup_checksum; 1406b24ab676SJeff Bonwick boolean_t dedup; 1407b24ab676SJeff Bonwick boolean_t dedup_verify = os->os_dedup_verify; 1408b24ab676SJeff Bonwick int copies = os->os_copies; 1409b24ab676SJeff Bonwick 1410b24ab676SJeff Bonwick /* 1411b24ab676SJeff Bonwick * Determine checksum setting. 1412b24ab676SJeff Bonwick */ 1413b24ab676SJeff Bonwick if (ismd) { 1414b24ab676SJeff Bonwick /* 1415b24ab676SJeff Bonwick * Metadata always gets checksummed. If the data 1416b24ab676SJeff Bonwick * checksum is multi-bit correctable, and it's not a 1417b24ab676SJeff Bonwick * ZBT-style checksum, then it's suitable for metadata 1418b24ab676SJeff Bonwick * as well. Otherwise, the metadata checksum defaults 1419b24ab676SJeff Bonwick * to fletcher4. 1420b24ab676SJeff Bonwick */ 1421b24ab676SJeff Bonwick if (zio_checksum_table[checksum].ci_correctable < 1 || 14226e1f5caaSNeil Perrin zio_checksum_table[checksum].ci_eck) 1423b24ab676SJeff Bonwick checksum = ZIO_CHECKSUM_FLETCHER_4; 1424b24ab676SJeff Bonwick } else { 1425b24ab676SJeff Bonwick checksum = zio_checksum_select(dn->dn_checksum, checksum); 1426b24ab676SJeff Bonwick } 1427b24ab676SJeff Bonwick 1428b24ab676SJeff Bonwick /* 1429b24ab676SJeff Bonwick * Determine compression setting. 1430b24ab676SJeff Bonwick */ 1431b24ab676SJeff Bonwick if (ismd) { 1432b24ab676SJeff Bonwick /* 1433b24ab676SJeff Bonwick * XXX -- we should design a compression algorithm 1434b24ab676SJeff Bonwick * that specializes in arrays of bps. 1435b24ab676SJeff Bonwick */ 1436b24ab676SJeff Bonwick compress = zfs_mdcomp_disable ? ZIO_COMPRESS_EMPTY : 1437b24ab676SJeff Bonwick ZIO_COMPRESS_LZJB; 1438b24ab676SJeff Bonwick } else { 1439b24ab676SJeff Bonwick compress = zio_compress_select(dn->dn_compress, compress); 1440b24ab676SJeff Bonwick } 1441b24ab676SJeff Bonwick 1442b24ab676SJeff Bonwick /* 1443b24ab676SJeff Bonwick * Determine dedup setting. If we are in dmu_sync(), we won't 1444b24ab676SJeff Bonwick * actually dedup now because that's all done in syncing context; 1445b24ab676SJeff Bonwick * but we do want to use the dedup checkum. If the checksum is not 1446b24ab676SJeff Bonwick * strong enough to ensure unique signatures, force dedup_verify. 1447b24ab676SJeff Bonwick */ 1448b24ab676SJeff Bonwick dedup = (!ismd && dedup_checksum != ZIO_CHECKSUM_OFF); 1449b24ab676SJeff Bonwick if (dedup) { 1450b24ab676SJeff Bonwick checksum = dedup_checksum; 1451b24ab676SJeff Bonwick if (!zio_checksum_table[checksum].ci_dedup) 1452b24ab676SJeff Bonwick dedup_verify = 1; 1453b24ab676SJeff Bonwick } 1454b24ab676SJeff Bonwick 1455b24ab676SJeff Bonwick if (wp & WP_DMU_SYNC) 1456b24ab676SJeff Bonwick dedup = 0; 1457b24ab676SJeff Bonwick 1458b24ab676SJeff Bonwick if (wp & WP_NOFILL) { 1459b24ab676SJeff Bonwick ASSERT(!ismd && level == 0); 1460b24ab676SJeff Bonwick checksum = ZIO_CHECKSUM_OFF; 1461b24ab676SJeff Bonwick compress = ZIO_COMPRESS_OFF; 1462b24ab676SJeff Bonwick dedup = B_FALSE; 1463b24ab676SJeff Bonwick } 1464b24ab676SJeff Bonwick 1465b24ab676SJeff Bonwick zp->zp_checksum = checksum; 1466b24ab676SJeff Bonwick zp->zp_compress = compress; 14670a586ceaSMark Shellenbaum zp->zp_type = (wp & WP_SPILL) ? dn->dn_bonustype : type; 1468b24ab676SJeff Bonwick zp->zp_level = level; 1469b24ab676SJeff Bonwick zp->zp_copies = MIN(copies + ismd, spa_max_replication(os->os_spa)); 1470b24ab676SJeff Bonwick zp->zp_dedup = dedup; 1471b24ab676SJeff Bonwick zp->zp_dedup_verify = dedup && dedup_verify; 1472b24ab676SJeff Bonwick } 1473b24ab676SJeff Bonwick 1474fa9e4066Sahrens int 1475fa9e4066Sahrens dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole, uint64_t *off) 1476fa9e4066Sahrens { 1477fa9e4066Sahrens dnode_t *dn; 1478fa9e4066Sahrens int i, err; 1479fa9e4066Sahrens 1480503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1481ea8dc4b6Seschrock if (err) 1482ea8dc4b6Seschrock return (err); 1483fa9e4066Sahrens /* 1484fa9e4066Sahrens * Sync any current changes before 1485fa9e4066Sahrens * we go trundling through the block pointers. 1486fa9e4066Sahrens */ 1487fa9e4066Sahrens for (i = 0; i < TXG_SIZE; i++) { 1488c543ec06Sahrens if (list_link_active(&dn->dn_dirty_link[i])) 1489fa9e4066Sahrens break; 1490fa9e4066Sahrens } 1491fa9e4066Sahrens if (i != TXG_SIZE) { 1492fa9e4066Sahrens dnode_rele(dn, FTAG); 1493fa9e4066Sahrens txg_wait_synced(dmu_objset_pool(os), 0); 1494503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1495ea8dc4b6Seschrock if (err) 1496ea8dc4b6Seschrock return (err); 1497fa9e4066Sahrens } 1498fa9e4066Sahrens 1499cdb0ab79Smaybee err = dnode_next_offset(dn, (hole ? DNODE_FIND_HOLE : 0), off, 1, 1, 0); 1500fa9e4066Sahrens dnode_rele(dn, FTAG); 1501fa9e4066Sahrens 1502fa9e4066Sahrens return (err); 1503fa9e4066Sahrens } 1504fa9e4066Sahrens 1505fa9e4066Sahrens void 1506fa9e4066Sahrens dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi) 1507fa9e4066Sahrens { 1508b24ab676SJeff Bonwick dnode_phys_t *dnp; 1509b24ab676SJeff Bonwick 1510fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 1511fa9e4066Sahrens mutex_enter(&dn->dn_mtx); 1512fa9e4066Sahrens 1513b24ab676SJeff Bonwick dnp = dn->dn_phys; 1514b24ab676SJeff Bonwick 1515fa9e4066Sahrens doi->doi_data_block_size = dn->dn_datablksz; 1516fa9e4066Sahrens doi->doi_metadata_block_size = dn->dn_indblkshift ? 1517fa9e4066Sahrens 1ULL << dn->dn_indblkshift : 0; 1518b24ab676SJeff Bonwick doi->doi_type = dn->dn_type; 1519b24ab676SJeff Bonwick doi->doi_bonus_type = dn->dn_bonustype; 1520b24ab676SJeff Bonwick doi->doi_bonus_size = dn->dn_bonuslen; 1521fa9e4066Sahrens doi->doi_indirection = dn->dn_nlevels; 1522fa9e4066Sahrens doi->doi_checksum = dn->dn_checksum; 1523fa9e4066Sahrens doi->doi_compress = dn->dn_compress; 1524b24ab676SJeff Bonwick doi->doi_physical_blocks_512 = (DN_USED_BYTES(dnp) + 256) >> 9; 1525b24ab676SJeff Bonwick doi->doi_max_offset = (dnp->dn_maxblkid + 1) * dn->dn_datablksz; 1526b24ab676SJeff Bonwick doi->doi_fill_count = 0; 1527b24ab676SJeff Bonwick for (int i = 0; i < dnp->dn_nblkptr; i++) 1528b24ab676SJeff Bonwick doi->doi_fill_count += dnp->dn_blkptr[i].blk_fill; 1529fa9e4066Sahrens 1530fa9e4066Sahrens mutex_exit(&dn->dn_mtx); 1531fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 1532fa9e4066Sahrens } 1533fa9e4066Sahrens 1534fa9e4066Sahrens /* 1535fa9e4066Sahrens * Get information on a DMU object. 1536fa9e4066Sahrens * If doi is NULL, just indicates whether the object exists. 1537fa9e4066Sahrens */ 1538fa9e4066Sahrens int 1539fa9e4066Sahrens dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi) 1540fa9e4066Sahrens { 1541ea8dc4b6Seschrock dnode_t *dn; 1542503ad85cSMatthew Ahrens int err = dnode_hold(os, object, FTAG, &dn); 1543fa9e4066Sahrens 1544ea8dc4b6Seschrock if (err) 1545ea8dc4b6Seschrock return (err); 1546fa9e4066Sahrens 1547fa9e4066Sahrens if (doi != NULL) 1548fa9e4066Sahrens dmu_object_info_from_dnode(dn, doi); 1549fa9e4066Sahrens 1550fa9e4066Sahrens dnode_rele(dn, FTAG); 1551fa9e4066Sahrens return (0); 1552fa9e4066Sahrens } 1553fa9e4066Sahrens 1554fa9e4066Sahrens /* 1555fa9e4066Sahrens * As above, but faster; can be used when you have a held dbuf in hand. 1556fa9e4066Sahrens */ 1557fa9e4066Sahrens void 1558fa9e4066Sahrens dmu_object_info_from_db(dmu_buf_t *db, dmu_object_info_t *doi) 1559fa9e4066Sahrens { 1560fa9e4066Sahrens dmu_object_info_from_dnode(((dmu_buf_impl_t *)db)->db_dnode, doi); 1561fa9e4066Sahrens } 1562fa9e4066Sahrens 1563fa9e4066Sahrens /* 1564fa9e4066Sahrens * Faster still when you only care about the size. 1565fa9e4066Sahrens * This is specifically optimized for zfs_getattr(). 1566fa9e4066Sahrens */ 1567fa9e4066Sahrens void 1568fa9e4066Sahrens dmu_object_size_from_db(dmu_buf_t *db, uint32_t *blksize, u_longlong_t *nblk512) 1569fa9e4066Sahrens { 1570fa9e4066Sahrens dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 1571fa9e4066Sahrens 1572fa9e4066Sahrens *blksize = dn->dn_datablksz; 157399653d4eSeschrock /* add 1 for dnode space */ 157499653d4eSeschrock *nblk512 = ((DN_USED_BYTES(dn->dn_phys) + SPA_MINBLOCKSIZE/2) >> 157599653d4eSeschrock SPA_MINBLOCKSHIFT) + 1; 1576fa9e4066Sahrens } 1577fa9e4066Sahrens 1578fa9e4066Sahrens void 1579fa9e4066Sahrens byteswap_uint64_array(void *vbuf, size_t size) 1580fa9e4066Sahrens { 1581fa9e4066Sahrens uint64_t *buf = vbuf; 1582fa9e4066Sahrens size_t count = size >> 3; 1583fa9e4066Sahrens int i; 1584fa9e4066Sahrens 1585fa9e4066Sahrens ASSERT((size & 7) == 0); 1586fa9e4066Sahrens 1587fa9e4066Sahrens for (i = 0; i < count; i++) 1588fa9e4066Sahrens buf[i] = BSWAP_64(buf[i]); 1589fa9e4066Sahrens } 1590fa9e4066Sahrens 1591fa9e4066Sahrens void 1592fa9e4066Sahrens byteswap_uint32_array(void *vbuf, size_t size) 1593fa9e4066Sahrens { 1594fa9e4066Sahrens uint32_t *buf = vbuf; 1595fa9e4066Sahrens size_t count = size >> 2; 1596fa9e4066Sahrens int i; 1597fa9e4066Sahrens 1598fa9e4066Sahrens ASSERT((size & 3) == 0); 1599fa9e4066Sahrens 1600fa9e4066Sahrens for (i = 0; i < count; i++) 1601fa9e4066Sahrens buf[i] = BSWAP_32(buf[i]); 1602fa9e4066Sahrens } 1603fa9e4066Sahrens 1604fa9e4066Sahrens void 1605fa9e4066Sahrens byteswap_uint16_array(void *vbuf, size_t size) 1606fa9e4066Sahrens { 1607fa9e4066Sahrens uint16_t *buf = vbuf; 1608fa9e4066Sahrens size_t count = size >> 1; 1609fa9e4066Sahrens int i; 1610fa9e4066Sahrens 1611fa9e4066Sahrens ASSERT((size & 1) == 0); 1612fa9e4066Sahrens 1613fa9e4066Sahrens for (i = 0; i < count; i++) 1614fa9e4066Sahrens buf[i] = BSWAP_16(buf[i]); 1615fa9e4066Sahrens } 1616fa9e4066Sahrens 1617fa9e4066Sahrens /* ARGSUSED */ 1618fa9e4066Sahrens void 1619fa9e4066Sahrens byteswap_uint8_array(void *vbuf, size_t size) 1620fa9e4066Sahrens { 1621fa9e4066Sahrens } 1622fa9e4066Sahrens 1623fa9e4066Sahrens void 1624fa9e4066Sahrens dmu_init(void) 1625fa9e4066Sahrens { 1626fa9e4066Sahrens dbuf_init(); 1627fa9e4066Sahrens dnode_init(); 16287cbf8b43SRich Morris zfetch_init(); 1629fa9e4066Sahrens arc_init(); 1630fa94a07fSbrendan l2arc_init(); 1631c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_init(); 16320a586ceaSMark Shellenbaum sa_cache_init(); 1633fa9e4066Sahrens } 1634fa9e4066Sahrens 1635fa9e4066Sahrens void 1636fa9e4066Sahrens dmu_fini(void) 1637fa9e4066Sahrens { 1638fa9e4066Sahrens arc_fini(); 16397cbf8b43SRich Morris zfetch_fini(); 1640fa9e4066Sahrens dnode_fini(); 1641fa9e4066Sahrens dbuf_fini(); 1642fa94a07fSbrendan l2arc_fini(); 1643c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_fini(); 16440a586ceaSMark Shellenbaum sa_cache_fini(); 1645fa9e4066Sahrens } 1646