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" }, 54cde58dbcSMatthew Ahrens { byteswap_uint64_array, TRUE, "bpobj" }, 55cde58dbcSMatthew Ahrens { byteswap_uint64_array, TRUE, "bpobj 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"}, 873f9d6ad7SLin Ling { zap_byteswap, TRUE, "scan 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" }, 963f9d6ad7SLin Ling { zap_byteswap, TRUE, "SA attr layouts" }, 973f9d6ad7SLin Ling { zap_byteswap, TRUE, "scan translations" }, 983f9d6ad7SLin Ling { byteswap_uint8_array, FALSE, "deduplicated block" }, 99cde58dbcSMatthew Ahrens { zap_byteswap, TRUE, "DSL deadlist map" }, 100cde58dbcSMatthew Ahrens { byteswap_uint64_array, TRUE, "DSL deadlist map hdr" }, 101cde58dbcSMatthew Ahrens { zap_byteswap, TRUE, "DSL dir clones" }, 102cde58dbcSMatthew Ahrens { byteswap_uint64_array, TRUE, "bpobj subobj" }, 1033f9d6ad7SLin Ling }; 104fa9e4066Sahrens 105fa9e4066Sahrens int 106ea8dc4b6Seschrock dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset, 10747cb52daSJeff Bonwick void *tag, dmu_buf_t **dbp, int flags) 108fa9e4066Sahrens { 109fa9e4066Sahrens dnode_t *dn; 110fa9e4066Sahrens uint64_t blkid; 111fa9e4066Sahrens dmu_buf_impl_t *db; 112ea8dc4b6Seschrock int err; 11347cb52daSJeff Bonwick int db_flags = DB_RF_CANFAIL; 11447cb52daSJeff Bonwick 11547cb52daSJeff Bonwick if (flags & DMU_READ_NO_PREFETCH) 11647cb52daSJeff Bonwick db_flags |= DB_RF_NOPREFETCH; 117fa9e4066Sahrens 118503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 119ea8dc4b6Seschrock if (err) 120ea8dc4b6Seschrock return (err); 121fa9e4066Sahrens blkid = dbuf_whichblock(dn, offset); 122fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 123ea8dc4b6Seschrock db = dbuf_hold(dn, blkid, tag); 124fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 125ea8dc4b6Seschrock if (db == NULL) { 126ea8dc4b6Seschrock err = EIO; 127ea8dc4b6Seschrock } else { 12847cb52daSJeff Bonwick err = dbuf_read(db, NULL, db_flags); 129ea8dc4b6Seschrock if (err) { 130ea8dc4b6Seschrock dbuf_rele(db, tag); 131ea8dc4b6Seschrock db = NULL; 132ea8dc4b6Seschrock } 133ea8dc4b6Seschrock } 134fa9e4066Sahrens 135ea8dc4b6Seschrock dnode_rele(dn, FTAG); 136ea8dc4b6Seschrock *dbp = &db->db; 137ea8dc4b6Seschrock return (err); 138fa9e4066Sahrens } 139fa9e4066Sahrens 140fa9e4066Sahrens int 141fa9e4066Sahrens dmu_bonus_max(void) 142fa9e4066Sahrens { 143fa9e4066Sahrens return (DN_MAX_BONUSLEN); 144fa9e4066Sahrens } 145fa9e4066Sahrens 1461934e92fSmaybee int 1471934e92fSmaybee dmu_set_bonus(dmu_buf_t *db, int newsize, dmu_tx_t *tx) 1481934e92fSmaybee { 1491934e92fSmaybee dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 1501934e92fSmaybee 1511934e92fSmaybee if (dn->dn_bonus != (dmu_buf_impl_t *)db) 1521934e92fSmaybee return (EINVAL); 1531934e92fSmaybee if (newsize < 0 || newsize > db->db_size) 1541934e92fSmaybee return (EINVAL); 1551934e92fSmaybee dnode_setbonuslen(dn, newsize, tx); 1561934e92fSmaybee return (0); 1571934e92fSmaybee } 1581934e92fSmaybee 1590a586ceaSMark Shellenbaum int 1600a586ceaSMark Shellenbaum dmu_set_bonustype(dmu_buf_t *db, dmu_object_type_t type, dmu_tx_t *tx) 1610a586ceaSMark Shellenbaum { 1620a586ceaSMark Shellenbaum dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 1630a586ceaSMark Shellenbaum 1640a586ceaSMark Shellenbaum if (type > DMU_OT_NUMTYPES) 1650a586ceaSMark Shellenbaum return (EINVAL); 1660a586ceaSMark Shellenbaum 1670a586ceaSMark Shellenbaum if (dn->dn_bonus != (dmu_buf_impl_t *)db) 1680a586ceaSMark Shellenbaum return (EINVAL); 1690a586ceaSMark Shellenbaum 1700a586ceaSMark Shellenbaum dnode_setbonus_type(dn, type, tx); 1710a586ceaSMark Shellenbaum return (0); 1720a586ceaSMark Shellenbaum } 1730a586ceaSMark Shellenbaum 1740a586ceaSMark Shellenbaum int 1750a586ceaSMark Shellenbaum dmu_rm_spill(objset_t *os, uint64_t object, dmu_tx_t *tx) 1760a586ceaSMark Shellenbaum { 1770a586ceaSMark Shellenbaum dnode_t *dn; 1780a586ceaSMark Shellenbaum int error; 1790a586ceaSMark Shellenbaum 1800a586ceaSMark Shellenbaum error = dnode_hold(os, object, FTAG, &dn); 1810a586ceaSMark Shellenbaum dbuf_rm_spill(dn, tx); 18206e0070dSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 18306e0070dSMark Shellenbaum dnode_rm_spill(dn, tx); 18406e0070dSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 1850a586ceaSMark Shellenbaum dnode_rele(dn, FTAG); 1860a586ceaSMark Shellenbaum return (error); 1870a586ceaSMark Shellenbaum } 1880a586ceaSMark Shellenbaum 189fa9e4066Sahrens /* 190ea8dc4b6Seschrock * returns ENOENT, EIO, or 0. 191fa9e4066Sahrens */ 192ea8dc4b6Seschrock int 193ea8dc4b6Seschrock dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **dbp) 194fa9e4066Sahrens { 195ea8dc4b6Seschrock dnode_t *dn; 196fa9e4066Sahrens dmu_buf_impl_t *db; 1971934e92fSmaybee int error; 198fa9e4066Sahrens 199503ad85cSMatthew Ahrens error = dnode_hold(os, object, FTAG, &dn); 2001934e92fSmaybee if (error) 2011934e92fSmaybee return (error); 202fa9e4066Sahrens 203ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_READER); 204ea8dc4b6Seschrock if (dn->dn_bonus == NULL) { 205fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 206ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 207ea8dc4b6Seschrock if (dn->dn_bonus == NULL) 2081934e92fSmaybee dbuf_create_bonus(dn); 209fa9e4066Sahrens } 210ea8dc4b6Seschrock db = dn->dn_bonus; 211ea8dc4b6Seschrock rw_exit(&dn->dn_struct_rwlock); 2121934e92fSmaybee 2131934e92fSmaybee /* as long as the bonus buf is held, the dnode will be held */ 2141934e92fSmaybee if (refcount_add(&db->db_holds, tag) == 1) 2151934e92fSmaybee VERIFY(dnode_add_ref(dn, db)); 2161934e92fSmaybee 217fa9e4066Sahrens dnode_rele(dn, FTAG); 218ea8dc4b6Seschrock 21947cb52daSJeff Bonwick VERIFY(0 == dbuf_read(db, NULL, DB_RF_MUST_SUCCEED | DB_RF_NOPREFETCH)); 220ea8dc4b6Seschrock 221ea8dc4b6Seschrock *dbp = &db->db; 222ea8dc4b6Seschrock return (0); 223fa9e4066Sahrens } 224fa9e4066Sahrens 2250a586ceaSMark Shellenbaum /* 2260a586ceaSMark Shellenbaum * returns ENOENT, EIO, or 0. 2270a586ceaSMark Shellenbaum * 2280a586ceaSMark Shellenbaum * This interface will allocate a blank spill dbuf when a spill blk 2290a586ceaSMark Shellenbaum * doesn't already exist on the dnode. 2300a586ceaSMark Shellenbaum * 2310a586ceaSMark Shellenbaum * if you only want to find an already existing spill db, then 2320a586ceaSMark Shellenbaum * dmu_spill_hold_existing() should be used. 2330a586ceaSMark Shellenbaum */ 2340a586ceaSMark Shellenbaum int 2350a586ceaSMark Shellenbaum dmu_spill_hold_by_dnode(dnode_t *dn, uint32_t flags, void *tag, dmu_buf_t **dbp) 2360a586ceaSMark Shellenbaum { 2370a586ceaSMark Shellenbaum dmu_buf_impl_t *db = NULL; 2380a586ceaSMark Shellenbaum int err; 2390a586ceaSMark Shellenbaum 2400a586ceaSMark Shellenbaum if ((flags & DB_RF_HAVESTRUCT) == 0) 2410a586ceaSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_READER); 2420a586ceaSMark Shellenbaum 2430a586ceaSMark Shellenbaum db = dbuf_hold(dn, DMU_SPILL_BLKID, tag); 2440a586ceaSMark Shellenbaum 2450a586ceaSMark Shellenbaum if ((flags & DB_RF_HAVESTRUCT) == 0) 2460a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 2470a586ceaSMark Shellenbaum 2480a586ceaSMark Shellenbaum ASSERT(db != NULL); 249*1d8ccc7bSMark Shellenbaum err = dbuf_read(db, NULL, flags); 250*1d8ccc7bSMark Shellenbaum if (err == 0) 251*1d8ccc7bSMark Shellenbaum *dbp = &db->db; 252*1d8ccc7bSMark Shellenbaum else 253*1d8ccc7bSMark Shellenbaum dbuf_rele(db, tag); 2540a586ceaSMark Shellenbaum return (err); 2550a586ceaSMark Shellenbaum } 2560a586ceaSMark Shellenbaum 2570a586ceaSMark Shellenbaum int 2580a586ceaSMark Shellenbaum dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) 2590a586ceaSMark Shellenbaum { 2600a586ceaSMark Shellenbaum dnode_t *dn = ((dmu_buf_impl_t *)bonus)->db_dnode; 2610a586ceaSMark Shellenbaum int err; 2620a586ceaSMark Shellenbaum 2630a586ceaSMark Shellenbaum if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_SA) 2640a586ceaSMark Shellenbaum return (EINVAL); 2650a586ceaSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_READER); 2660a586ceaSMark Shellenbaum 2670a586ceaSMark Shellenbaum if (!dn->dn_have_spill) { 2680a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 2690a586ceaSMark Shellenbaum return (ENOENT); 2700a586ceaSMark Shellenbaum } 271*1d8ccc7bSMark Shellenbaum err = dmu_spill_hold_by_dnode(dn, 272*1d8ccc7bSMark Shellenbaum DB_RF_HAVESTRUCT | DB_RF_CANFAIL, tag, dbp); 2730a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 2740a586ceaSMark Shellenbaum return (err); 2750a586ceaSMark Shellenbaum } 2760a586ceaSMark Shellenbaum 2770a586ceaSMark Shellenbaum int 2780a586ceaSMark Shellenbaum dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) 2790a586ceaSMark Shellenbaum { 2800a586ceaSMark Shellenbaum return (dmu_spill_hold_by_dnode(((dmu_buf_impl_t *)bonus)->db_dnode, 281*1d8ccc7bSMark Shellenbaum DB_RF_CANFAIL, tag, dbp)); 2820a586ceaSMark Shellenbaum } 2830a586ceaSMark Shellenbaum 28413506d1eSmaybee /* 28513506d1eSmaybee * Note: longer-term, we should modify all of the dmu_buf_*() interfaces 28613506d1eSmaybee * to take a held dnode rather than <os, object> -- the lookup is wasteful, 28713506d1eSmaybee * and can induce severe lock contention when writing to several files 28813506d1eSmaybee * whose dnodes are in the same block. 28913506d1eSmaybee */ 29013506d1eSmaybee static int 2917bfdf011SNeil Perrin dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset, uint64_t length, 2927bfdf011SNeil Perrin int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp, uint32_t flags) 293fa9e4066Sahrens { 29405715f94SMark Maybee dsl_pool_t *dp = NULL; 295fa9e4066Sahrens dmu_buf_t **dbp; 296fa9e4066Sahrens uint64_t blkid, nblks, i; 2977bfdf011SNeil Perrin uint32_t dbuf_flags; 298ea8dc4b6Seschrock int err; 299ea8dc4b6Seschrock zio_t *zio; 30005715f94SMark Maybee hrtime_t start; 301ea8dc4b6Seschrock 302ea8dc4b6Seschrock ASSERT(length <= DMU_MAX_ACCESS); 303fa9e4066Sahrens 304c87b8fc5SMark J Musante dbuf_flags = DB_RF_CANFAIL | DB_RF_NEVERWAIT | DB_RF_HAVESTRUCT; 3057bfdf011SNeil Perrin if (flags & DMU_READ_NO_PREFETCH || length > zfetch_array_rd_sz) 3067bfdf011SNeil Perrin dbuf_flags |= DB_RF_NOPREFETCH; 307ea8dc4b6Seschrock 308fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 309fa9e4066Sahrens if (dn->dn_datablkshift) { 310fa9e4066Sahrens int blkshift = dn->dn_datablkshift; 311fa9e4066Sahrens nblks = (P2ROUNDUP(offset+length, 1ULL<<blkshift) - 312b1b8ab34Slling P2ALIGN(offset, 1ULL<<blkshift)) >> blkshift; 313fa9e4066Sahrens } else { 3140125049cSahrens if (offset + length > dn->dn_datablksz) { 3150125049cSahrens zfs_panic_recover("zfs: accessing past end of object " 3160125049cSahrens "%llx/%llx (size=%u access=%llu+%llu)", 3170125049cSahrens (longlong_t)dn->dn_objset-> 3180125049cSahrens os_dsl_dataset->ds_object, 3190125049cSahrens (longlong_t)dn->dn_object, dn->dn_datablksz, 3200125049cSahrens (longlong_t)offset, (longlong_t)length); 321c87b8fc5SMark J Musante rw_exit(&dn->dn_struct_rwlock); 3220125049cSahrens return (EIO); 3230125049cSahrens } 324fa9e4066Sahrens nblks = 1; 325fa9e4066Sahrens } 326ea8dc4b6Seschrock dbp = kmem_zalloc(sizeof (dmu_buf_t *) * nblks, KM_SLEEP); 327fa9e4066Sahrens 32805715f94SMark Maybee if (dn->dn_objset->os_dsl_dataset) 32905715f94SMark Maybee dp = dn->dn_objset->os_dsl_dataset->ds_dir->dd_pool; 33005715f94SMark Maybee if (dp && dsl_pool_sync_context(dp)) 33105715f94SMark Maybee start = gethrtime(); 332e14bb325SJeff Bonwick zio = zio_root(dn->dn_objset->os_spa, NULL, NULL, ZIO_FLAG_CANFAIL); 333fa9e4066Sahrens blkid = dbuf_whichblock(dn, offset); 334fa9e4066Sahrens for (i = 0; i < nblks; i++) { 335ea8dc4b6Seschrock dmu_buf_impl_t *db = dbuf_hold(dn, blkid+i, tag); 336ea8dc4b6Seschrock if (db == NULL) { 337ea8dc4b6Seschrock rw_exit(&dn->dn_struct_rwlock); 338ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 339ea8dc4b6Seschrock zio_nowait(zio); 340ea8dc4b6Seschrock return (EIO); 341ea8dc4b6Seschrock } 342ea8dc4b6Seschrock /* initiate async i/o */ 34313506d1eSmaybee if (read) { 3447bfdf011SNeil Perrin (void) dbuf_read(db, zio, dbuf_flags); 345ea8dc4b6Seschrock } 346ea8dc4b6Seschrock dbp[i] = &db->db; 347fa9e4066Sahrens } 348fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 349fa9e4066Sahrens 350ea8dc4b6Seschrock /* wait for async i/o */ 351ea8dc4b6Seschrock err = zio_wait(zio); 35205715f94SMark Maybee /* track read overhead when we are in sync context */ 35305715f94SMark Maybee if (dp && dsl_pool_sync_context(dp)) 35405715f94SMark Maybee dp->dp_read_overhead += gethrtime() - start; 355ea8dc4b6Seschrock if (err) { 356ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 357ea8dc4b6Seschrock return (err); 358ea8dc4b6Seschrock } 359fa9e4066Sahrens 360ea8dc4b6Seschrock /* wait for other io to complete */ 361ea8dc4b6Seschrock if (read) { 362ea8dc4b6Seschrock for (i = 0; i < nblks; i++) { 363ea8dc4b6Seschrock dmu_buf_impl_t *db = (dmu_buf_impl_t *)dbp[i]; 364ea8dc4b6Seschrock mutex_enter(&db->db_mtx); 365ea8dc4b6Seschrock while (db->db_state == DB_READ || 366ea8dc4b6Seschrock db->db_state == DB_FILL) 367ea8dc4b6Seschrock cv_wait(&db->db_changed, &db->db_mtx); 368ea8dc4b6Seschrock if (db->db_state == DB_UNCACHED) 369ea8dc4b6Seschrock err = EIO; 370ea8dc4b6Seschrock mutex_exit(&db->db_mtx); 371ea8dc4b6Seschrock if (err) { 372ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 373ea8dc4b6Seschrock return (err); 374ea8dc4b6Seschrock } 375ea8dc4b6Seschrock } 376ea8dc4b6Seschrock } 377fa9e4066Sahrens 378ea8dc4b6Seschrock *numbufsp = nblks; 379ea8dc4b6Seschrock *dbpp = dbp; 380ea8dc4b6Seschrock return (0); 381fa9e4066Sahrens } 382fa9e4066Sahrens 383a2eea2e1Sahrens static int 38413506d1eSmaybee dmu_buf_hold_array(objset_t *os, uint64_t object, uint64_t offset, 38513506d1eSmaybee uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) 38613506d1eSmaybee { 38713506d1eSmaybee dnode_t *dn; 38813506d1eSmaybee int err; 38913506d1eSmaybee 390503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 39113506d1eSmaybee if (err) 39213506d1eSmaybee return (err); 39313506d1eSmaybee 39413506d1eSmaybee err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, 3957bfdf011SNeil Perrin numbufsp, dbpp, DMU_READ_PREFETCH); 39613506d1eSmaybee 39713506d1eSmaybee dnode_rele(dn, FTAG); 39813506d1eSmaybee 39913506d1eSmaybee return (err); 40013506d1eSmaybee } 40113506d1eSmaybee 40213506d1eSmaybee int 40313506d1eSmaybee dmu_buf_hold_array_by_bonus(dmu_buf_t *db, uint64_t offset, 40413506d1eSmaybee uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) 40513506d1eSmaybee { 40613506d1eSmaybee dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 40713506d1eSmaybee int err; 40813506d1eSmaybee 40913506d1eSmaybee err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, 4107bfdf011SNeil Perrin numbufsp, dbpp, DMU_READ_PREFETCH); 41113506d1eSmaybee 41213506d1eSmaybee return (err); 41313506d1eSmaybee } 41413506d1eSmaybee 415fa9e4066Sahrens void 416ea8dc4b6Seschrock dmu_buf_rele_array(dmu_buf_t **dbp_fake, int numbufs, void *tag) 417fa9e4066Sahrens { 418fa9e4066Sahrens int i; 419fa9e4066Sahrens dmu_buf_impl_t **dbp = (dmu_buf_impl_t **)dbp_fake; 420fa9e4066Sahrens 421fa9e4066Sahrens if (numbufs == 0) 422fa9e4066Sahrens return; 423fa9e4066Sahrens 424ea8dc4b6Seschrock for (i = 0; i < numbufs; i++) { 425ea8dc4b6Seschrock if (dbp[i]) 426ea8dc4b6Seschrock dbuf_rele(dbp[i], tag); 427ea8dc4b6Seschrock } 428fa9e4066Sahrens 429fa9e4066Sahrens kmem_free(dbp, sizeof (dmu_buf_t *) * numbufs); 430fa9e4066Sahrens } 431fa9e4066Sahrens 432fa9e4066Sahrens void 433fa9e4066Sahrens dmu_prefetch(objset_t *os, uint64_t object, uint64_t offset, uint64_t len) 434fa9e4066Sahrens { 435fa9e4066Sahrens dnode_t *dn; 436fa9e4066Sahrens uint64_t blkid; 437ea8dc4b6Seschrock int nblks, i, err; 438fa9e4066Sahrens 439416e0cd8Sek if (zfs_prefetch_disable) 440416e0cd8Sek return; 441416e0cd8Sek 442fa9e4066Sahrens if (len == 0) { /* they're interested in the bonus buffer */ 443503ad85cSMatthew Ahrens dn = os->os_meta_dnode; 444fa9e4066Sahrens 445fa9e4066Sahrens if (object == 0 || object >= DN_MAX_OBJECT) 446fa9e4066Sahrens return; 447fa9e4066Sahrens 448fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 449fa9e4066Sahrens blkid = dbuf_whichblock(dn, object * sizeof (dnode_phys_t)); 450fa9e4066Sahrens dbuf_prefetch(dn, blkid); 451fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 452fa9e4066Sahrens return; 453fa9e4066Sahrens } 454fa9e4066Sahrens 455fa9e4066Sahrens /* 456fa9e4066Sahrens * XXX - Note, if the dnode for the requested object is not 457fa9e4066Sahrens * already cached, we will do a *synchronous* read in the 458fa9e4066Sahrens * dnode_hold() call. The same is true for any indirects. 459fa9e4066Sahrens */ 460503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 461ea8dc4b6Seschrock if (err != 0) 462fa9e4066Sahrens return; 463fa9e4066Sahrens 464fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 465fa9e4066Sahrens if (dn->dn_datablkshift) { 466fa9e4066Sahrens int blkshift = dn->dn_datablkshift; 467fa9e4066Sahrens nblks = (P2ROUNDUP(offset+len, 1<<blkshift) - 468b1b8ab34Slling P2ALIGN(offset, 1<<blkshift)) >> blkshift; 469fa9e4066Sahrens } else { 470fa9e4066Sahrens nblks = (offset < dn->dn_datablksz); 471fa9e4066Sahrens } 472fa9e4066Sahrens 473fa9e4066Sahrens if (nblks != 0) { 474fa9e4066Sahrens blkid = dbuf_whichblock(dn, offset); 475fa9e4066Sahrens for (i = 0; i < nblks; i++) 476fa9e4066Sahrens dbuf_prefetch(dn, blkid+i); 477fa9e4066Sahrens } 478fa9e4066Sahrens 479fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 480fa9e4066Sahrens 481fa9e4066Sahrens dnode_rele(dn, FTAG); 482fa9e4066Sahrens } 483fa9e4066Sahrens 48476256205SMark Maybee /* 48576256205SMark Maybee * Get the next "chunk" of file data to free. We traverse the file from 48676256205SMark Maybee * the end so that the file gets shorter over time (if we crashes in the 48776256205SMark Maybee * middle, this will leave us in a better state). We find allocated file 48876256205SMark Maybee * data by simply searching the allocated level 1 indirects. 48976256205SMark Maybee */ 490cdb0ab79Smaybee static int 49176256205SMark Maybee get_next_chunk(dnode_t *dn, uint64_t *start, uint64_t limit) 492cdb0ab79Smaybee { 49376256205SMark Maybee uint64_t len = *start - limit; 49476256205SMark Maybee uint64_t blkcnt = 0; 49576256205SMark Maybee uint64_t maxblks = DMU_MAX_ACCESS / (1ULL << (dn->dn_indblkshift + 1)); 49676256205SMark Maybee uint64_t iblkrange = 4971c8564a7SMark Maybee dn->dn_datablksz * EPB(dn->dn_indblkshift, SPA_BLKPTRSHIFT); 498cdb0ab79Smaybee 49976256205SMark Maybee ASSERT(limit <= *start); 500cdb0ab79Smaybee 50176256205SMark Maybee if (len <= iblkrange * maxblks) { 50276256205SMark Maybee *start = limit; 503cdb0ab79Smaybee return (0); 504cdb0ab79Smaybee } 50576256205SMark Maybee ASSERT(ISP2(iblkrange)); 506cdb0ab79Smaybee 50776256205SMark Maybee while (*start > limit && blkcnt < maxblks) { 5081c8564a7SMark Maybee int err; 509cdb0ab79Smaybee 51076256205SMark Maybee /* find next allocated L1 indirect */ 511cdb0ab79Smaybee err = dnode_next_offset(dn, 51276256205SMark Maybee DNODE_FIND_BACKWARDS, start, 2, 1, 0); 513cdb0ab79Smaybee 51476256205SMark Maybee /* if there are no more, then we are done */ 51576256205SMark Maybee if (err == ESRCH) { 51676256205SMark Maybee *start = limit; 517cdb0ab79Smaybee return (0); 51876256205SMark Maybee } else if (err) { 519cdb0ab79Smaybee return (err); 52076256205SMark Maybee } 52176256205SMark Maybee blkcnt += 1; 52276256205SMark Maybee 52376256205SMark Maybee /* reset offset to end of "next" block back */ 52476256205SMark Maybee *start = P2ALIGN(*start, iblkrange); 52576256205SMark Maybee if (*start <= limit) 52676256205SMark Maybee *start = limit; 52776256205SMark Maybee else 52876256205SMark Maybee *start -= 1; 529cdb0ab79Smaybee } 530cdb0ab79Smaybee return (0); 531cdb0ab79Smaybee } 532cdb0ab79Smaybee 533cdb0ab79Smaybee static int 534cdb0ab79Smaybee dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset, 535cdb0ab79Smaybee uint64_t length, boolean_t free_dnode) 536cdb0ab79Smaybee { 537cdb0ab79Smaybee dmu_tx_t *tx; 538cdb0ab79Smaybee uint64_t object_size, start, end, len; 539cdb0ab79Smaybee boolean_t trunc = (length == DMU_OBJECT_END); 540cdb0ab79Smaybee int align, err; 541cdb0ab79Smaybee 542cdb0ab79Smaybee align = 1 << dn->dn_datablkshift; 543cdb0ab79Smaybee ASSERT(align > 0); 544cdb0ab79Smaybee object_size = align == 1 ? dn->dn_datablksz : 545cdb0ab79Smaybee (dn->dn_maxblkid + 1) << dn->dn_datablkshift; 546cdb0ab79Smaybee 54714843421SMatthew Ahrens end = offset + length; 54814843421SMatthew Ahrens if (trunc || end > object_size) 549cdb0ab79Smaybee end = object_size; 550cdb0ab79Smaybee if (end <= offset) 551cdb0ab79Smaybee return (0); 552cdb0ab79Smaybee length = end - offset; 553cdb0ab79Smaybee 554cdb0ab79Smaybee while (length) { 555cdb0ab79Smaybee start = end; 55614843421SMatthew Ahrens /* assert(offset <= start) */ 557cdb0ab79Smaybee err = get_next_chunk(dn, &start, offset); 558cdb0ab79Smaybee if (err) 559cdb0ab79Smaybee return (err); 560cdb0ab79Smaybee len = trunc ? DMU_OBJECT_END : end - start; 561cdb0ab79Smaybee 562cdb0ab79Smaybee tx = dmu_tx_create(os); 563cdb0ab79Smaybee dmu_tx_hold_free(tx, dn->dn_object, start, len); 564cdb0ab79Smaybee err = dmu_tx_assign(tx, TXG_WAIT); 565cdb0ab79Smaybee if (err) { 566cdb0ab79Smaybee dmu_tx_abort(tx); 567cdb0ab79Smaybee return (err); 568cdb0ab79Smaybee } 569cdb0ab79Smaybee 570cdb0ab79Smaybee dnode_free_range(dn, start, trunc ? -1 : len, tx); 571cdb0ab79Smaybee 5721c8564a7SMark Maybee if (start == 0 && free_dnode) { 5731c8564a7SMark Maybee ASSERT(trunc); 574cdb0ab79Smaybee dnode_free(dn, tx); 5751c8564a7SMark Maybee } 576cdb0ab79Smaybee 577cdb0ab79Smaybee length -= end - start; 578cdb0ab79Smaybee 579cdb0ab79Smaybee dmu_tx_commit(tx); 580cdb0ab79Smaybee end = start; 581cdb0ab79Smaybee } 582cdb0ab79Smaybee return (0); 583cdb0ab79Smaybee } 584cdb0ab79Smaybee 585cdb0ab79Smaybee int 586cdb0ab79Smaybee dmu_free_long_range(objset_t *os, uint64_t object, 587cdb0ab79Smaybee uint64_t offset, uint64_t length) 588cdb0ab79Smaybee { 589cdb0ab79Smaybee dnode_t *dn; 590cdb0ab79Smaybee int err; 591cdb0ab79Smaybee 592503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 593cdb0ab79Smaybee if (err != 0) 594cdb0ab79Smaybee return (err); 595cdb0ab79Smaybee err = dmu_free_long_range_impl(os, dn, offset, length, FALSE); 596cdb0ab79Smaybee dnode_rele(dn, FTAG); 597cdb0ab79Smaybee return (err); 598cdb0ab79Smaybee } 599cdb0ab79Smaybee 600cdb0ab79Smaybee int 601cdb0ab79Smaybee dmu_free_object(objset_t *os, uint64_t object) 602cdb0ab79Smaybee { 603cdb0ab79Smaybee dnode_t *dn; 604cdb0ab79Smaybee dmu_tx_t *tx; 605cdb0ab79Smaybee int err; 606cdb0ab79Smaybee 607503ad85cSMatthew Ahrens err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, 608cdb0ab79Smaybee FTAG, &dn); 609cdb0ab79Smaybee if (err != 0) 610cdb0ab79Smaybee return (err); 611cdb0ab79Smaybee if (dn->dn_nlevels == 1) { 612cdb0ab79Smaybee tx = dmu_tx_create(os); 613cdb0ab79Smaybee dmu_tx_hold_bonus(tx, object); 614cdb0ab79Smaybee dmu_tx_hold_free(tx, dn->dn_object, 0, DMU_OBJECT_END); 615cdb0ab79Smaybee err = dmu_tx_assign(tx, TXG_WAIT); 616cdb0ab79Smaybee if (err == 0) { 617cdb0ab79Smaybee dnode_free_range(dn, 0, DMU_OBJECT_END, tx); 618cdb0ab79Smaybee dnode_free(dn, tx); 619cdb0ab79Smaybee dmu_tx_commit(tx); 620cdb0ab79Smaybee } else { 621cdb0ab79Smaybee dmu_tx_abort(tx); 622cdb0ab79Smaybee } 623cdb0ab79Smaybee } else { 624cdb0ab79Smaybee err = dmu_free_long_range_impl(os, dn, 0, DMU_OBJECT_END, TRUE); 625cdb0ab79Smaybee } 626cdb0ab79Smaybee dnode_rele(dn, FTAG); 627cdb0ab79Smaybee return (err); 628cdb0ab79Smaybee } 629cdb0ab79Smaybee 630ea8dc4b6Seschrock int 631fa9e4066Sahrens dmu_free_range(objset_t *os, uint64_t object, uint64_t offset, 632fa9e4066Sahrens uint64_t size, dmu_tx_t *tx) 633fa9e4066Sahrens { 634ea8dc4b6Seschrock dnode_t *dn; 635503ad85cSMatthew Ahrens int err = dnode_hold(os, object, FTAG, &dn); 636ea8dc4b6Seschrock if (err) 637ea8dc4b6Seschrock return (err); 638fa9e4066Sahrens ASSERT(offset < UINT64_MAX); 639fa9e4066Sahrens ASSERT(size == -1ULL || size <= UINT64_MAX - offset); 640fa9e4066Sahrens dnode_free_range(dn, offset, size, tx); 641fa9e4066Sahrens dnode_rele(dn, FTAG); 642ea8dc4b6Seschrock return (0); 643fa9e4066Sahrens } 644fa9e4066Sahrens 645ea8dc4b6Seschrock int 646ea8dc4b6Seschrock dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 6477bfdf011SNeil Perrin void *buf, uint32_t flags) 648fa9e4066Sahrens { 649fa9e4066Sahrens dnode_t *dn; 650fa9e4066Sahrens dmu_buf_t **dbp; 651c87b8fc5SMark J Musante int numbufs, err; 652fa9e4066Sahrens 653503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 654ea8dc4b6Seschrock if (err) 655ea8dc4b6Seschrock return (err); 656feb08c6bSbillm 657feb08c6bSbillm /* 658feb08c6bSbillm * Deal with odd block sizes, where there can't be data past the first 659feb08c6bSbillm * block. If we ever do the tail block optimization, we will need to 660feb08c6bSbillm * handle that here as well. 661feb08c6bSbillm */ 662c87b8fc5SMark J Musante if (dn->dn_maxblkid == 0) { 663fa9e4066Sahrens int newsz = offset > dn->dn_datablksz ? 0 : 664fa9e4066Sahrens MIN(size, dn->dn_datablksz - offset); 665fa9e4066Sahrens bzero((char *)buf + newsz, size - newsz); 666fa9e4066Sahrens size = newsz; 667fa9e4066Sahrens } 668fa9e4066Sahrens 669fa9e4066Sahrens while (size > 0) { 670fa9e4066Sahrens uint64_t mylen = MIN(size, DMU_MAX_ACCESS / 2); 671c87b8fc5SMark J Musante int i; 672fa9e4066Sahrens 673fa9e4066Sahrens /* 674fa9e4066Sahrens * NB: we could do this block-at-a-time, but it's nice 675fa9e4066Sahrens * to be reading in parallel. 676fa9e4066Sahrens */ 677a2eea2e1Sahrens err = dmu_buf_hold_array_by_dnode(dn, offset, mylen, 6787bfdf011SNeil Perrin TRUE, FTAG, &numbufs, &dbp, flags); 679ea8dc4b6Seschrock if (err) 6801934e92fSmaybee break; 681fa9e4066Sahrens 682fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 683fa9e4066Sahrens int tocpy; 684fa9e4066Sahrens int bufoff; 685fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 686fa9e4066Sahrens 687fa9e4066Sahrens ASSERT(size > 0); 688fa9e4066Sahrens 689fa9e4066Sahrens bufoff = offset - db->db_offset; 690fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 691fa9e4066Sahrens 692fa9e4066Sahrens bcopy((char *)db->db_data + bufoff, buf, tocpy); 693fa9e4066Sahrens 694fa9e4066Sahrens offset += tocpy; 695fa9e4066Sahrens size -= tocpy; 696fa9e4066Sahrens buf = (char *)buf + tocpy; 697fa9e4066Sahrens } 698ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 699fa9e4066Sahrens } 700a2eea2e1Sahrens dnode_rele(dn, FTAG); 7011934e92fSmaybee return (err); 702fa9e4066Sahrens } 703fa9e4066Sahrens 704fa9e4066Sahrens void 705fa9e4066Sahrens dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 706fa9e4066Sahrens const void *buf, dmu_tx_t *tx) 707fa9e4066Sahrens { 708fa9e4066Sahrens dmu_buf_t **dbp; 709fa9e4066Sahrens int numbufs, i; 710fa9e4066Sahrens 71113506d1eSmaybee if (size == 0) 71213506d1eSmaybee return; 71313506d1eSmaybee 714ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, 715ea8dc4b6Seschrock FALSE, FTAG, &numbufs, &dbp)); 716fa9e4066Sahrens 717fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 718fa9e4066Sahrens int tocpy; 719fa9e4066Sahrens int bufoff; 720fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 721fa9e4066Sahrens 722fa9e4066Sahrens ASSERT(size > 0); 723fa9e4066Sahrens 724fa9e4066Sahrens bufoff = offset - db->db_offset; 725fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 726fa9e4066Sahrens 727fa9e4066Sahrens ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 728fa9e4066Sahrens 729fa9e4066Sahrens if (tocpy == db->db_size) 730fa9e4066Sahrens dmu_buf_will_fill(db, tx); 731fa9e4066Sahrens else 732fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 733fa9e4066Sahrens 734fa9e4066Sahrens bcopy(buf, (char *)db->db_data + bufoff, tocpy); 735fa9e4066Sahrens 736fa9e4066Sahrens if (tocpy == db->db_size) 737fa9e4066Sahrens dmu_buf_fill_done(db, tx); 738fa9e4066Sahrens 739fa9e4066Sahrens offset += tocpy; 740fa9e4066Sahrens size -= tocpy; 741fa9e4066Sahrens buf = (char *)buf + tocpy; 742fa9e4066Sahrens } 743ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 744fa9e4066Sahrens } 745fa9e4066Sahrens 74682c9918fSTim Haley void 74782c9918fSTim Haley dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 74882c9918fSTim Haley dmu_tx_t *tx) 74982c9918fSTim Haley { 75082c9918fSTim Haley dmu_buf_t **dbp; 75182c9918fSTim Haley int numbufs, i; 75282c9918fSTim Haley 75382c9918fSTim Haley if (size == 0) 75482c9918fSTim Haley return; 75582c9918fSTim Haley 75682c9918fSTim Haley VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, 75782c9918fSTim Haley FALSE, FTAG, &numbufs, &dbp)); 75882c9918fSTim Haley 75982c9918fSTim Haley for (i = 0; i < numbufs; i++) { 76082c9918fSTim Haley dmu_buf_t *db = dbp[i]; 76182c9918fSTim Haley 76282c9918fSTim Haley dmu_buf_will_not_fill(db, tx); 76382c9918fSTim Haley } 76482c9918fSTim Haley dmu_buf_rele_array(dbp, numbufs, FTAG); 76582c9918fSTim Haley } 76682c9918fSTim Haley 767c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 768c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * DMU support for xuio 769c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 770c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_t *xuio_ksp = NULL; 771c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 772c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 773c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_init(xuio_t *xuio, int nblk) 774c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 775c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv; 776c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 777c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 778c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_iovcnt = nblk; 779c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_iov = kmem_zalloc(nblk * sizeof (iovec_t), KM_SLEEP); 780c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 781c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv = kmem_zalloc(sizeof (dmu_xuio_t), KM_SLEEP); 782c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->cnt = nblk; 783c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs = kmem_zalloc(nblk * sizeof (arc_buf_t *), KM_SLEEP); 784c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->iovp = uio->uio_iov; 785c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIO_XUZC_PRIV(xuio) = priv; 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 return (0); 793c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 794c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 795c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 796c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_fini(xuio_t *xuio) 797c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 798c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 799c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int nblk = priv->cnt; 800c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 801c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv->iovp, nblk * sizeof (iovec_t)); 802c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv->bufs, nblk * sizeof (arc_buf_t *)); 803c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv, sizeof (dmu_xuio_t)); 804c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 805c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (XUIO_XUZC_RW(xuio) == UIO_READ) 806c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_rbuf, -nblk); 807c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 808c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_wbuf, -nblk); 809c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 810c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 811c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 812c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Initialize iov[priv->next] and priv->bufs[priv->next] with { off, n, abuf } 813c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * and increase priv->next by 1. 814c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 815c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 816c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_add(xuio_t *xuio, arc_buf_t *abuf, offset_t off, size_t n) 817c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 818c242f9a0Schunli zhang - Sun Microsystems - Irvine United States struct iovec *iov; 819c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 820c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 821c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int i = priv->next++; 822c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 823c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 824c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(off + n <= arc_buf_size(abuf)); 825c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov = uio->uio_iov + i; 826c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov->iov_base = (char *)abuf->b_data + off; 827c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov->iov_len = n; 828c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs[i] = abuf; 829c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 830c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 831c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 832c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 833c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_cnt(xuio_t *xuio) 834c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 835c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 836c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (priv->cnt); 837c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 838c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 839c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t * 840c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_arcbuf(xuio_t *xuio, int i) 841c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 842c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 843c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 844c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 845c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (priv->bufs[i]); 846c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 847c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 848c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 849c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_clear(xuio_t *xuio, int i) 850c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 851c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 852c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 853c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 854c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs[i] = NULL; 855c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 856c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 857c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static void 858c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_init(void) 859c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 860c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp = kstat_create("zfs", 0, "xuio_stats", "misc", 861c242f9a0Schunli zhang - Sun Microsystems - Irvine United States KSTAT_TYPE_NAMED, sizeof (xuio_stats) / sizeof (kstat_named_t), 862c242f9a0Schunli zhang - Sun Microsystems - Irvine United States KSTAT_FLAG_VIRTUAL); 863c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio_ksp != NULL) { 864c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp->ks_data = &xuio_stats; 865c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_install(xuio_ksp); 866c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 867c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 868c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 869c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static void 870c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_fini(void) 871c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 872c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio_ksp != NULL) { 873c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_delete(xuio_ksp); 874c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp = NULL; 875c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 876c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 877c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 878c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 879c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_wbuf_copied() 880c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 881c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_copied); 882c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 883c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 884c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 885c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_wbuf_nocopy() 886c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 887c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_nocopy); 888c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 889c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 890fa9e4066Sahrens #ifdef _KERNEL 891fa9e4066Sahrens int 892feb08c6bSbillm dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size) 893feb08c6bSbillm { 894feb08c6bSbillm dmu_buf_t **dbp; 895feb08c6bSbillm int numbufs, i, err; 896c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_t *xuio = NULL; 897feb08c6bSbillm 898feb08c6bSbillm /* 899feb08c6bSbillm * NB: we could do this block-at-a-time, but it's nice 900feb08c6bSbillm * to be reading in parallel. 901feb08c6bSbillm */ 902feb08c6bSbillm err = dmu_buf_hold_array(os, object, uio->uio_loffset, size, TRUE, FTAG, 903feb08c6bSbillm &numbufs, &dbp); 904feb08c6bSbillm if (err) 905feb08c6bSbillm return (err); 906feb08c6bSbillm 907c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (uio->uio_extflg == UIO_XUIO) 908c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio = (xuio_t *)uio; 909c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 910feb08c6bSbillm for (i = 0; i < numbufs; i++) { 911feb08c6bSbillm int tocpy; 912feb08c6bSbillm int bufoff; 913feb08c6bSbillm dmu_buf_t *db = dbp[i]; 914feb08c6bSbillm 915feb08c6bSbillm ASSERT(size > 0); 916feb08c6bSbillm 917feb08c6bSbillm bufoff = uio->uio_loffset - db->db_offset; 918feb08c6bSbillm tocpy = (int)MIN(db->db_size - bufoff, size); 919feb08c6bSbillm 920c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio) { 921c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db; 922c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *dbuf_abuf = dbi->db_buf; 923c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *abuf = dbuf_loan_arcbuf(dbi); 924c242f9a0Schunli zhang - Sun Microsystems - Irvine United States err = dmu_xuio_add(xuio, abuf, bufoff, tocpy); 925c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (!err) { 926c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_resid -= tocpy; 927c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_loffset += tocpy; 928c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 929c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 930c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (abuf == dbuf_abuf) 931c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_rbuf_nocopy); 932c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 933c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_rbuf_copied); 934c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else { 935c242f9a0Schunli zhang - Sun Microsystems - Irvine United States err = uiomove((char *)db->db_data + bufoff, tocpy, 936c242f9a0Schunli zhang - Sun Microsystems - Irvine United States UIO_READ, uio); 937c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 938feb08c6bSbillm if (err) 939feb08c6bSbillm break; 940feb08c6bSbillm 941feb08c6bSbillm size -= tocpy; 942feb08c6bSbillm } 943feb08c6bSbillm dmu_buf_rele_array(dbp, numbufs, FTAG); 944feb08c6bSbillm 945feb08c6bSbillm return (err); 946feb08c6bSbillm } 947feb08c6bSbillm 94894d1a210STim Haley static int 94994d1a210STim Haley dmu_write_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size, dmu_tx_t *tx) 950fa9e4066Sahrens { 951fa9e4066Sahrens dmu_buf_t **dbp; 95294d1a210STim Haley int numbufs; 953fa9e4066Sahrens int err = 0; 95494d1a210STim Haley int i; 955fa9e4066Sahrens 95694d1a210STim Haley err = dmu_buf_hold_array_by_dnode(dn, uio->uio_loffset, size, 95794d1a210STim Haley FALSE, FTAG, &numbufs, &dbp, DMU_READ_PREFETCH); 958ea8dc4b6Seschrock if (err) 959ea8dc4b6Seschrock return (err); 960fa9e4066Sahrens 961fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 962fa9e4066Sahrens int tocpy; 963fa9e4066Sahrens int bufoff; 964fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 965fa9e4066Sahrens 966fa9e4066Sahrens ASSERT(size > 0); 967fa9e4066Sahrens 968feb08c6bSbillm bufoff = uio->uio_loffset - db->db_offset; 969fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 970fa9e4066Sahrens 971fa9e4066Sahrens ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 972fa9e4066Sahrens 973fa9e4066Sahrens if (tocpy == db->db_size) 974fa9e4066Sahrens dmu_buf_will_fill(db, tx); 975fa9e4066Sahrens else 976fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 977fa9e4066Sahrens 978fa9e4066Sahrens /* 979fa9e4066Sahrens * XXX uiomove could block forever (eg. nfs-backed 980fa9e4066Sahrens * pages). There needs to be a uiolockdown() function 981fa9e4066Sahrens * to lock the pages in memory, so that uiomove won't 982fa9e4066Sahrens * block. 983fa9e4066Sahrens */ 984fa9e4066Sahrens err = uiomove((char *)db->db_data + bufoff, tocpy, 985fa9e4066Sahrens UIO_WRITE, uio); 986fa9e4066Sahrens 987fa9e4066Sahrens if (tocpy == db->db_size) 988fa9e4066Sahrens dmu_buf_fill_done(db, tx); 989fa9e4066Sahrens 990fa9e4066Sahrens if (err) 991fa9e4066Sahrens break; 992fa9e4066Sahrens 993fa9e4066Sahrens size -= tocpy; 994fa9e4066Sahrens } 99594d1a210STim Haley 996ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 997fa9e4066Sahrens return (err); 998fa9e4066Sahrens } 99944eda4d7Smaybee 100094d1a210STim Haley int 100194d1a210STim Haley dmu_write_uio_dbuf(dmu_buf_t *zdb, uio_t *uio, uint64_t size, 100294d1a210STim Haley dmu_tx_t *tx) 100394d1a210STim Haley { 100494d1a210STim Haley if (size == 0) 100594d1a210STim Haley return (0); 100694d1a210STim Haley 100794d1a210STim Haley return (dmu_write_uio_dnode(((dmu_buf_impl_t *)zdb)->db_dnode, 100894d1a210STim Haley uio, size, tx)); 100994d1a210STim Haley } 101094d1a210STim Haley 101194d1a210STim Haley int 101294d1a210STim Haley dmu_write_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size, 101394d1a210STim Haley dmu_tx_t *tx) 101494d1a210STim Haley { 101594d1a210STim Haley dnode_t *dn; 101694d1a210STim Haley int err; 101794d1a210STim Haley 101894d1a210STim Haley if (size == 0) 101994d1a210STim Haley return (0); 102094d1a210STim Haley 102194d1a210STim Haley err = dnode_hold(os, object, FTAG, &dn); 102294d1a210STim Haley if (err) 102394d1a210STim Haley return (err); 102494d1a210STim Haley 102594d1a210STim Haley err = dmu_write_uio_dnode(dn, uio, size, tx); 102694d1a210STim Haley 102794d1a210STim Haley dnode_rele(dn, FTAG); 102894d1a210STim Haley 102994d1a210STim Haley return (err); 103094d1a210STim Haley } 103194d1a210STim Haley 103244eda4d7Smaybee int 103344eda4d7Smaybee dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 103444eda4d7Smaybee page_t *pp, dmu_tx_t *tx) 103544eda4d7Smaybee { 103644eda4d7Smaybee dmu_buf_t **dbp; 103744eda4d7Smaybee int numbufs, i; 103844eda4d7Smaybee int err; 103944eda4d7Smaybee 104044eda4d7Smaybee if (size == 0) 104144eda4d7Smaybee return (0); 104244eda4d7Smaybee 104344eda4d7Smaybee err = dmu_buf_hold_array(os, object, offset, size, 104444eda4d7Smaybee FALSE, FTAG, &numbufs, &dbp); 104544eda4d7Smaybee if (err) 104644eda4d7Smaybee return (err); 104744eda4d7Smaybee 104844eda4d7Smaybee for (i = 0; i < numbufs; i++) { 104944eda4d7Smaybee int tocpy, copied, thiscpy; 105044eda4d7Smaybee int bufoff; 105144eda4d7Smaybee dmu_buf_t *db = dbp[i]; 105244eda4d7Smaybee caddr_t va; 105344eda4d7Smaybee 105444eda4d7Smaybee ASSERT(size > 0); 105544eda4d7Smaybee ASSERT3U(db->db_size, >=, PAGESIZE); 105644eda4d7Smaybee 105744eda4d7Smaybee bufoff = offset - db->db_offset; 105844eda4d7Smaybee tocpy = (int)MIN(db->db_size - bufoff, size); 105944eda4d7Smaybee 106044eda4d7Smaybee ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 106144eda4d7Smaybee 106244eda4d7Smaybee if (tocpy == db->db_size) 106344eda4d7Smaybee dmu_buf_will_fill(db, tx); 106444eda4d7Smaybee else 106544eda4d7Smaybee dmu_buf_will_dirty(db, tx); 106644eda4d7Smaybee 106744eda4d7Smaybee for (copied = 0; copied < tocpy; copied += PAGESIZE) { 106844eda4d7Smaybee ASSERT3U(pp->p_offset, ==, db->db_offset + bufoff); 106944eda4d7Smaybee thiscpy = MIN(PAGESIZE, tocpy - copied); 10700fab61baSJonathan W Adams va = zfs_map_page(pp, S_READ); 107144eda4d7Smaybee bcopy(va, (char *)db->db_data + bufoff, thiscpy); 10720fab61baSJonathan W Adams zfs_unmap_page(pp, va); 107344eda4d7Smaybee pp = pp->p_next; 107444eda4d7Smaybee bufoff += PAGESIZE; 107544eda4d7Smaybee } 107644eda4d7Smaybee 107744eda4d7Smaybee if (tocpy == db->db_size) 107844eda4d7Smaybee dmu_buf_fill_done(db, tx); 107944eda4d7Smaybee 108044eda4d7Smaybee offset += tocpy; 108144eda4d7Smaybee size -= tocpy; 108244eda4d7Smaybee } 108344eda4d7Smaybee dmu_buf_rele_array(dbp, numbufs, FTAG); 108444eda4d7Smaybee return (err); 108544eda4d7Smaybee } 1086fa9e4066Sahrens #endif 1087fa9e4066Sahrens 10882fdbea25SAleksandr Guzovskiy /* 10892fdbea25SAleksandr Guzovskiy * Allocate a loaned anonymous arc buffer. 10902fdbea25SAleksandr Guzovskiy */ 10912fdbea25SAleksandr Guzovskiy arc_buf_t * 10922fdbea25SAleksandr Guzovskiy dmu_request_arcbuf(dmu_buf_t *handle, int size) 10932fdbea25SAleksandr Guzovskiy { 10942fdbea25SAleksandr Guzovskiy dnode_t *dn = ((dmu_buf_impl_t *)handle)->db_dnode; 10952fdbea25SAleksandr Guzovskiy 10962fdbea25SAleksandr Guzovskiy return (arc_loan_buf(dn->dn_objset->os_spa, size)); 10972fdbea25SAleksandr Guzovskiy } 10982fdbea25SAleksandr Guzovskiy 10992fdbea25SAleksandr Guzovskiy /* 11002fdbea25SAleksandr Guzovskiy * Free a loaned arc buffer. 11012fdbea25SAleksandr Guzovskiy */ 11022fdbea25SAleksandr Guzovskiy void 11032fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(arc_buf_t *buf) 11042fdbea25SAleksandr Guzovskiy { 11052fdbea25SAleksandr Guzovskiy arc_return_buf(buf, FTAG); 11062fdbea25SAleksandr Guzovskiy VERIFY(arc_buf_remove_ref(buf, FTAG) == 1); 11072fdbea25SAleksandr Guzovskiy } 11082fdbea25SAleksandr Guzovskiy 11092fdbea25SAleksandr Guzovskiy /* 11102fdbea25SAleksandr Guzovskiy * When possible directly assign passed loaned arc buffer to a dbuf. 11112fdbea25SAleksandr Guzovskiy * If this is not possible copy the contents of passed arc buf via 11122fdbea25SAleksandr Guzovskiy * dmu_write(). 11132fdbea25SAleksandr Guzovskiy */ 11142fdbea25SAleksandr Guzovskiy void 11152fdbea25SAleksandr Guzovskiy dmu_assign_arcbuf(dmu_buf_t *handle, uint64_t offset, arc_buf_t *buf, 11162fdbea25SAleksandr Guzovskiy dmu_tx_t *tx) 11172fdbea25SAleksandr Guzovskiy { 11182fdbea25SAleksandr Guzovskiy dnode_t *dn = ((dmu_buf_impl_t *)handle)->db_dnode; 11192fdbea25SAleksandr Guzovskiy dmu_buf_impl_t *db; 11202fdbea25SAleksandr Guzovskiy uint32_t blksz = (uint32_t)arc_buf_size(buf); 11212fdbea25SAleksandr Guzovskiy uint64_t blkid; 11222fdbea25SAleksandr Guzovskiy 11232fdbea25SAleksandr Guzovskiy rw_enter(&dn->dn_struct_rwlock, RW_READER); 11242fdbea25SAleksandr Guzovskiy blkid = dbuf_whichblock(dn, offset); 11252fdbea25SAleksandr Guzovskiy VERIFY((db = dbuf_hold(dn, blkid, FTAG)) != NULL); 11262fdbea25SAleksandr Guzovskiy rw_exit(&dn->dn_struct_rwlock); 11272fdbea25SAleksandr Guzovskiy 11282fdbea25SAleksandr Guzovskiy if (offset == db->db.db_offset && blksz == db->db.db_size) { 11292fdbea25SAleksandr Guzovskiy dbuf_assign_arcbuf(db, buf, tx); 11302fdbea25SAleksandr Guzovskiy dbuf_rele(db, FTAG); 11312fdbea25SAleksandr Guzovskiy } else { 11322fdbea25SAleksandr Guzovskiy dbuf_rele(db, FTAG); 1133503ad85cSMatthew Ahrens dmu_write(dn->dn_objset, dn->dn_object, offset, blksz, 11342fdbea25SAleksandr Guzovskiy buf->b_data, tx); 11352fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(buf); 1136c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_copied); 11372fdbea25SAleksandr Guzovskiy } 11382fdbea25SAleksandr Guzovskiy } 11392fdbea25SAleksandr Guzovskiy 1140c5c6ffa0Smaybee typedef struct { 1141b24ab676SJeff Bonwick dbuf_dirty_record_t *dsa_dr; 1142b24ab676SJeff Bonwick dmu_sync_cb_t *dsa_done; 1143b24ab676SJeff Bonwick zgd_t *dsa_zgd; 1144b24ab676SJeff Bonwick dmu_tx_t *dsa_tx; 1145c717a561Smaybee } dmu_sync_arg_t; 1146c5c6ffa0Smaybee 1147e14bb325SJeff Bonwick /* ARGSUSED */ 1148e14bb325SJeff Bonwick static void 1149e14bb325SJeff Bonwick dmu_sync_ready(zio_t *zio, arc_buf_t *buf, void *varg) 1150e14bb325SJeff Bonwick { 1151b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = varg; 1152b24ab676SJeff Bonwick dmu_buf_t *db = dsa->dsa_zgd->zgd_db; 1153b24ab676SJeff Bonwick dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 1154e14bb325SJeff Bonwick blkptr_t *bp = zio->io_bp; 1155975c32a0SNeil Perrin 1156b24ab676SJeff Bonwick if (zio->io_error == 0) { 1157b24ab676SJeff Bonwick if (BP_IS_HOLE(bp)) { 1158b24ab676SJeff Bonwick /* 1159b24ab676SJeff Bonwick * A block of zeros may compress to a hole, but the 1160b24ab676SJeff Bonwick * block size still needs to be known for replay. 1161b24ab676SJeff Bonwick */ 1162b24ab676SJeff Bonwick BP_SET_LSIZE(bp, db->db_size); 1163b24ab676SJeff Bonwick } else { 1164b24ab676SJeff Bonwick ASSERT(BP_GET_TYPE(bp) == dn->dn_type); 1165b24ab676SJeff Bonwick ASSERT(BP_GET_LEVEL(bp) == 0); 1166b24ab676SJeff Bonwick bp->blk_fill = 1; 1167b24ab676SJeff Bonwick } 1168e14bb325SJeff Bonwick } 1169e14bb325SJeff Bonwick } 1170e14bb325SJeff Bonwick 1171b24ab676SJeff Bonwick static void 1172b24ab676SJeff Bonwick dmu_sync_late_arrival_ready(zio_t *zio) 1173b24ab676SJeff Bonwick { 1174b24ab676SJeff Bonwick dmu_sync_ready(zio, NULL, zio->io_private); 1175b24ab676SJeff Bonwick } 1176b24ab676SJeff Bonwick 1177c5c6ffa0Smaybee /* ARGSUSED */ 1178c5c6ffa0Smaybee static void 1179c5c6ffa0Smaybee dmu_sync_done(zio_t *zio, arc_buf_t *buf, void *varg) 1180c5c6ffa0Smaybee { 1181b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = varg; 1182b24ab676SJeff Bonwick dbuf_dirty_record_t *dr = dsa->dsa_dr; 1183c717a561Smaybee dmu_buf_impl_t *db = dr->dr_dbuf; 1184c5c6ffa0Smaybee 1185b50a0fe0SNeil Perrin mutex_enter(&db->db_mtx); 1186b50a0fe0SNeil Perrin ASSERT(dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC); 1187b24ab676SJeff Bonwick if (zio->io_error == 0) { 1188b24ab676SJeff Bonwick dr->dt.dl.dr_overridden_by = *zio->io_bp; 1189b24ab676SJeff Bonwick dr->dt.dl.dr_override_state = DR_OVERRIDDEN; 1190b24ab676SJeff Bonwick dr->dt.dl.dr_copies = zio->io_prop.zp_copies; 1191b24ab676SJeff Bonwick if (BP_IS_HOLE(&dr->dt.dl.dr_overridden_by)) 1192b24ab676SJeff Bonwick BP_ZERO(&dr->dt.dl.dr_overridden_by); 1193b24ab676SJeff Bonwick } else { 1194b24ab676SJeff Bonwick dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN; 1195b24ab676SJeff Bonwick } 1196c5c6ffa0Smaybee cv_broadcast(&db->db_changed); 1197b50a0fe0SNeil Perrin mutex_exit(&db->db_mtx); 1198b50a0fe0SNeil Perrin 1199b24ab676SJeff Bonwick dsa->dsa_done(dsa->dsa_zgd, zio->io_error); 1200b24ab676SJeff Bonwick 1201b24ab676SJeff Bonwick kmem_free(dsa, sizeof (*dsa)); 1202b24ab676SJeff Bonwick } 1203b24ab676SJeff Bonwick 1204b24ab676SJeff Bonwick static void 1205b24ab676SJeff Bonwick dmu_sync_late_arrival_done(zio_t *zio) 1206b24ab676SJeff Bonwick { 1207b24ab676SJeff Bonwick blkptr_t *bp = zio->io_bp; 1208b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = zio->io_private; 1209b24ab676SJeff Bonwick 1210b24ab676SJeff Bonwick if (zio->io_error == 0 && !BP_IS_HOLE(bp)) { 1211b24ab676SJeff Bonwick ASSERT(zio->io_bp->blk_birth == zio->io_txg); 1212b24ab676SJeff Bonwick ASSERT(zio->io_txg > spa_syncing_txg(zio->io_spa)); 1213b24ab676SJeff Bonwick zio_free(zio->io_spa, zio->io_txg, zio->io_bp); 1214b24ab676SJeff Bonwick } 1215b24ab676SJeff Bonwick 1216b24ab676SJeff Bonwick dmu_tx_commit(dsa->dsa_tx); 1217b24ab676SJeff Bonwick 1218b24ab676SJeff Bonwick dsa->dsa_done(dsa->dsa_zgd, zio->io_error); 1219b24ab676SJeff Bonwick 1220b24ab676SJeff Bonwick kmem_free(dsa, sizeof (*dsa)); 1221b24ab676SJeff Bonwick } 1222b24ab676SJeff Bonwick 1223b24ab676SJeff Bonwick static int 1224b24ab676SJeff Bonwick dmu_sync_late_arrival(zio_t *pio, objset_t *os, dmu_sync_cb_t *done, zgd_t *zgd, 1225b24ab676SJeff Bonwick zio_prop_t *zp, zbookmark_t *zb) 1226b24ab676SJeff Bonwick { 1227b24ab676SJeff Bonwick dmu_sync_arg_t *dsa; 1228b24ab676SJeff Bonwick dmu_tx_t *tx; 1229b24ab676SJeff Bonwick 1230b24ab676SJeff Bonwick tx = dmu_tx_create(os); 1231b24ab676SJeff Bonwick dmu_tx_hold_space(tx, zgd->zgd_db->db_size); 12326e1f5caaSNeil Perrin if (dmu_tx_assign(tx, TXG_WAIT) != 0) { 1233b24ab676SJeff Bonwick dmu_tx_abort(tx); 1234b24ab676SJeff Bonwick return (EIO); /* Make zl_get_data do txg_waited_synced() */ 1235b24ab676SJeff Bonwick } 1236b24ab676SJeff Bonwick 1237b24ab676SJeff Bonwick dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); 1238b24ab676SJeff Bonwick dsa->dsa_dr = NULL; 1239b24ab676SJeff Bonwick dsa->dsa_done = done; 1240b24ab676SJeff Bonwick dsa->dsa_zgd = zgd; 1241b24ab676SJeff Bonwick dsa->dsa_tx = tx; 1242c717a561Smaybee 1243b24ab676SJeff Bonwick zio_nowait(zio_write(pio, os->os_spa, dmu_tx_get_txg(tx), zgd->zgd_bp, 1244b24ab676SJeff Bonwick zgd->zgd_db->db_data, zgd->zgd_db->db_size, zp, 1245b24ab676SJeff Bonwick dmu_sync_late_arrival_ready, dmu_sync_late_arrival_done, dsa, 1246b24ab676SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, zb)); 1247b24ab676SJeff Bonwick 1248b24ab676SJeff Bonwick return (0); 1249c5c6ffa0Smaybee } 1250c5c6ffa0Smaybee 1251fa9e4066Sahrens /* 1252c5c6ffa0Smaybee * Intent log support: sync the block associated with db to disk. 1253c5c6ffa0Smaybee * N.B. and XXX: the caller is responsible for making sure that the 1254c5c6ffa0Smaybee * data isn't changing while dmu_sync() is writing it. 1255fa9e4066Sahrens * 1256fa9e4066Sahrens * Return values: 1257fa9e4066Sahrens * 1258c5c6ffa0Smaybee * EEXIST: this txg has already been synced, so there's nothing to to. 1259fa9e4066Sahrens * The caller should not log the write. 1260fa9e4066Sahrens * 1261fa9e4066Sahrens * ENOENT: the block was dbuf_free_range()'d, so there's nothing to do. 1262fa9e4066Sahrens * The caller should not log the write. 1263fa9e4066Sahrens * 1264c5c6ffa0Smaybee * EALREADY: this block is already in the process of being synced. 1265c5c6ffa0Smaybee * The caller should track its progress (somehow). 1266fa9e4066Sahrens * 1267b24ab676SJeff Bonwick * EIO: could not do the I/O. 1268b24ab676SJeff Bonwick * The caller should do a txg_wait_synced(). 1269fa9e4066Sahrens * 1270b24ab676SJeff Bonwick * 0: the I/O has been initiated. 1271b24ab676SJeff Bonwick * The caller should log this blkptr in the done callback. 1272b24ab676SJeff Bonwick * It is possible that the I/O will fail, in which case 1273b24ab676SJeff Bonwick * the error will be reported to the done callback and 1274b24ab676SJeff Bonwick * propagated to pio from zio_done(). 1275fa9e4066Sahrens */ 1276fa9e4066Sahrens int 1277b24ab676SJeff Bonwick dmu_sync(zio_t *pio, uint64_t txg, dmu_sync_cb_t *done, zgd_t *zgd) 1278fa9e4066Sahrens { 1279b24ab676SJeff Bonwick blkptr_t *bp = zgd->zgd_bp; 1280b24ab676SJeff Bonwick dmu_buf_impl_t *db = (dmu_buf_impl_t *)zgd->zgd_db; 1281503ad85cSMatthew Ahrens objset_t *os = db->db_objset; 1282b24ab676SJeff Bonwick dsl_dataset_t *ds = os->os_dsl_dataset; 1283c717a561Smaybee dbuf_dirty_record_t *dr; 1284b24ab676SJeff Bonwick dmu_sync_arg_t *dsa; 1285ea8dc4b6Seschrock zbookmark_t zb; 1286b24ab676SJeff Bonwick zio_prop_t zp; 1287fa9e4066Sahrens 1288b24ab676SJeff Bonwick ASSERT(pio != NULL); 1289fa9e4066Sahrens ASSERT(BP_IS_HOLE(bp)); 1290fa9e4066Sahrens ASSERT(txg != 0); 1291fa9e4066Sahrens 1292b24ab676SJeff Bonwick SET_BOOKMARK(&zb, ds->ds_object, 1293b24ab676SJeff Bonwick db->db.db_object, db->db_level, db->db_blkid); 1294b24ab676SJeff Bonwick 1295b24ab676SJeff Bonwick dmu_write_policy(os, db->db_dnode, db->db_level, WP_DMU_SYNC, &zp); 1296fa9e4066Sahrens 1297ea8dc4b6Seschrock /* 1298b24ab676SJeff Bonwick * If we're frozen (running ziltest), we always need to generate a bp. 1299ea8dc4b6Seschrock */ 1300b24ab676SJeff Bonwick if (txg > spa_freeze_txg(os->os_spa)) 1301b24ab676SJeff Bonwick return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); 1302ea8dc4b6Seschrock 1303fa9e4066Sahrens /* 1304b24ab676SJeff Bonwick * Grabbing db_mtx now provides a barrier between dbuf_sync_leaf() 1305b24ab676SJeff Bonwick * and us. If we determine that this txg is not yet syncing, 1306b24ab676SJeff Bonwick * but it begins to sync a moment later, that's OK because the 1307b24ab676SJeff Bonwick * sync thread will block in dbuf_sync_leaf() until we drop db_mtx. 1308fa9e4066Sahrens */ 1309b24ab676SJeff Bonwick mutex_enter(&db->db_mtx); 1310b24ab676SJeff Bonwick 1311b24ab676SJeff Bonwick if (txg <= spa_last_synced_txg(os->os_spa)) { 1312fa9e4066Sahrens /* 1313b24ab676SJeff Bonwick * This txg has already synced. There's nothing to do. 1314fa9e4066Sahrens */ 1315b24ab676SJeff Bonwick mutex_exit(&db->db_mtx); 1316c5c6ffa0Smaybee return (EEXIST); 1317fa9e4066Sahrens } 1318fa9e4066Sahrens 1319b24ab676SJeff Bonwick if (txg <= spa_syncing_txg(os->os_spa)) { 1320b24ab676SJeff Bonwick /* 1321b24ab676SJeff Bonwick * This txg is currently syncing, so we can't mess with 1322b24ab676SJeff Bonwick * the dirty record anymore; just write a new log block. 1323b24ab676SJeff Bonwick */ 1324b24ab676SJeff Bonwick mutex_exit(&db->db_mtx); 1325b24ab676SJeff Bonwick return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); 1326fa9e4066Sahrens } 1327fa9e4066Sahrens 1328c717a561Smaybee dr = db->db_last_dirty; 1329b24ab676SJeff Bonwick while (dr && dr->dr_txg != txg) 1330c717a561Smaybee dr = dr->dr_next; 1331b24ab676SJeff Bonwick 1332b24ab676SJeff Bonwick if (dr == NULL) { 1333c5c6ffa0Smaybee /* 1334b24ab676SJeff Bonwick * There's no dr for this dbuf, so it must have been freed. 1335c5c6ffa0Smaybee * There's no need to log writes to freed blocks, so we're done. 1336c5c6ffa0Smaybee */ 1337c5c6ffa0Smaybee mutex_exit(&db->db_mtx); 1338c5c6ffa0Smaybee return (ENOENT); 1339c5c6ffa0Smaybee } 1340c5c6ffa0Smaybee 1341c717a561Smaybee ASSERT(dr->dr_txg == txg); 1342b24ab676SJeff Bonwick if (dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC || 1343b24ab676SJeff Bonwick dr->dt.dl.dr_override_state == DR_OVERRIDDEN) { 1344c717a561Smaybee /* 1345b24ab676SJeff Bonwick * We have already issued a sync write for this buffer, 1346b24ab676SJeff Bonwick * or this buffer has already been synced. It could not 1347c717a561Smaybee * have been dirtied since, or we would have cleared the state. 1348c717a561Smaybee */ 1349c717a561Smaybee mutex_exit(&db->db_mtx); 1350b24ab676SJeff Bonwick return (EALREADY); 1351c717a561Smaybee } 1352c717a561Smaybee 1353b24ab676SJeff Bonwick ASSERT(dr->dt.dl.dr_override_state == DR_NOT_OVERRIDDEN); 1354c717a561Smaybee dr->dt.dl.dr_override_state = DR_IN_DMU_SYNC; 1355fa9e4066Sahrens mutex_exit(&db->db_mtx); 1356e14bb325SJeff Bonwick 1357b24ab676SJeff Bonwick dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); 1358b24ab676SJeff Bonwick dsa->dsa_dr = dr; 1359b24ab676SJeff Bonwick dsa->dsa_done = done; 1360b24ab676SJeff Bonwick dsa->dsa_zgd = zgd; 1361b24ab676SJeff Bonwick dsa->dsa_tx = NULL; 1362e14bb325SJeff Bonwick 1363b24ab676SJeff Bonwick zio_nowait(arc_write(pio, os->os_spa, txg, 1364b24ab676SJeff Bonwick bp, dr->dt.dl.dr_data, DBUF_IS_L2CACHEABLE(db), &zp, 1365b24ab676SJeff Bonwick dmu_sync_ready, dmu_sync_done, dsa, 1366b24ab676SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, &zb)); 1367e14bb325SJeff Bonwick 1368b24ab676SJeff Bonwick return (0); 1369fa9e4066Sahrens } 1370fa9e4066Sahrens 1371fa9e4066Sahrens int 1372fa9e4066Sahrens dmu_object_set_blocksize(objset_t *os, uint64_t object, uint64_t size, int ibs, 1373fa9e4066Sahrens dmu_tx_t *tx) 1374fa9e4066Sahrens { 1375ea8dc4b6Seschrock dnode_t *dn; 1376ea8dc4b6Seschrock int err; 1377ea8dc4b6Seschrock 1378503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1379ea8dc4b6Seschrock if (err) 1380ea8dc4b6Seschrock return (err); 1381ea8dc4b6Seschrock err = dnode_set_blksz(dn, size, ibs, tx); 1382fa9e4066Sahrens dnode_rele(dn, FTAG); 1383fa9e4066Sahrens return (err); 1384fa9e4066Sahrens } 1385fa9e4066Sahrens 1386fa9e4066Sahrens void 1387fa9e4066Sahrens dmu_object_set_checksum(objset_t *os, uint64_t object, uint8_t checksum, 1388fa9e4066Sahrens dmu_tx_t *tx) 1389fa9e4066Sahrens { 1390ea8dc4b6Seschrock dnode_t *dn; 1391ea8dc4b6Seschrock 1392ea8dc4b6Seschrock /* XXX assumes dnode_hold will not get an i/o error */ 1393503ad85cSMatthew Ahrens (void) dnode_hold(os, object, FTAG, &dn); 1394fa9e4066Sahrens ASSERT(checksum < ZIO_CHECKSUM_FUNCTIONS); 1395fa9e4066Sahrens dn->dn_checksum = checksum; 1396fa9e4066Sahrens dnode_setdirty(dn, tx); 1397fa9e4066Sahrens dnode_rele(dn, FTAG); 1398fa9e4066Sahrens } 1399fa9e4066Sahrens 1400fa9e4066Sahrens void 1401fa9e4066Sahrens dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress, 1402fa9e4066Sahrens dmu_tx_t *tx) 1403fa9e4066Sahrens { 1404ea8dc4b6Seschrock dnode_t *dn; 1405ea8dc4b6Seschrock 1406ea8dc4b6Seschrock /* XXX assumes dnode_hold will not get an i/o error */ 1407503ad85cSMatthew Ahrens (void) dnode_hold(os, object, FTAG, &dn); 1408fa9e4066Sahrens ASSERT(compress < ZIO_COMPRESS_FUNCTIONS); 1409fa9e4066Sahrens dn->dn_compress = compress; 1410fa9e4066Sahrens dnode_setdirty(dn, tx); 1411fa9e4066Sahrens dnode_rele(dn, FTAG); 1412fa9e4066Sahrens } 1413fa9e4066Sahrens 1414b24ab676SJeff Bonwick int zfs_mdcomp_disable = 0; 1415b24ab676SJeff Bonwick 1416b24ab676SJeff Bonwick void 1417b24ab676SJeff Bonwick dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp, zio_prop_t *zp) 1418b24ab676SJeff Bonwick { 1419b24ab676SJeff Bonwick dmu_object_type_t type = dn ? dn->dn_type : DMU_OT_OBJSET; 1420*1d8ccc7bSMark Shellenbaum boolean_t ismd = (level > 0 || dmu_ot[type].ot_metadata || 1421*1d8ccc7bSMark Shellenbaum (wp & WP_SPILL)); 1422b24ab676SJeff Bonwick enum zio_checksum checksum = os->os_checksum; 1423b24ab676SJeff Bonwick enum zio_compress compress = os->os_compress; 1424b24ab676SJeff Bonwick enum zio_checksum dedup_checksum = os->os_dedup_checksum; 1425b24ab676SJeff Bonwick boolean_t dedup; 1426b24ab676SJeff Bonwick boolean_t dedup_verify = os->os_dedup_verify; 1427b24ab676SJeff Bonwick int copies = os->os_copies; 1428b24ab676SJeff Bonwick 1429b24ab676SJeff Bonwick /* 1430b24ab676SJeff Bonwick * Determine checksum setting. 1431b24ab676SJeff Bonwick */ 1432b24ab676SJeff Bonwick if (ismd) { 1433b24ab676SJeff Bonwick /* 1434b24ab676SJeff Bonwick * Metadata always gets checksummed. If the data 1435b24ab676SJeff Bonwick * checksum is multi-bit correctable, and it's not a 1436b24ab676SJeff Bonwick * ZBT-style checksum, then it's suitable for metadata 1437b24ab676SJeff Bonwick * as well. Otherwise, the metadata checksum defaults 1438b24ab676SJeff Bonwick * to fletcher4. 1439b24ab676SJeff Bonwick */ 1440b24ab676SJeff Bonwick if (zio_checksum_table[checksum].ci_correctable < 1 || 14416e1f5caaSNeil Perrin zio_checksum_table[checksum].ci_eck) 1442b24ab676SJeff Bonwick checksum = ZIO_CHECKSUM_FLETCHER_4; 1443b24ab676SJeff Bonwick } else { 1444b24ab676SJeff Bonwick checksum = zio_checksum_select(dn->dn_checksum, checksum); 1445b24ab676SJeff Bonwick } 1446b24ab676SJeff Bonwick 1447b24ab676SJeff Bonwick /* 1448b24ab676SJeff Bonwick * Determine compression setting. 1449b24ab676SJeff Bonwick */ 1450b24ab676SJeff Bonwick if (ismd) { 1451b24ab676SJeff Bonwick /* 1452b24ab676SJeff Bonwick * XXX -- we should design a compression algorithm 1453b24ab676SJeff Bonwick * that specializes in arrays of bps. 1454b24ab676SJeff Bonwick */ 1455b24ab676SJeff Bonwick compress = zfs_mdcomp_disable ? ZIO_COMPRESS_EMPTY : 1456b24ab676SJeff Bonwick ZIO_COMPRESS_LZJB; 1457b24ab676SJeff Bonwick } else { 1458b24ab676SJeff Bonwick compress = zio_compress_select(dn->dn_compress, compress); 1459b24ab676SJeff Bonwick } 1460b24ab676SJeff Bonwick 1461b24ab676SJeff Bonwick /* 1462b24ab676SJeff Bonwick * Determine dedup setting. If we are in dmu_sync(), we won't 1463b24ab676SJeff Bonwick * actually dedup now because that's all done in syncing context; 1464b24ab676SJeff Bonwick * but we do want to use the dedup checkum. If the checksum is not 1465b24ab676SJeff Bonwick * strong enough to ensure unique signatures, force dedup_verify. 1466b24ab676SJeff Bonwick */ 1467b24ab676SJeff Bonwick dedup = (!ismd && dedup_checksum != ZIO_CHECKSUM_OFF); 1468b24ab676SJeff Bonwick if (dedup) { 1469b24ab676SJeff Bonwick checksum = dedup_checksum; 1470b24ab676SJeff Bonwick if (!zio_checksum_table[checksum].ci_dedup) 1471b24ab676SJeff Bonwick dedup_verify = 1; 1472b24ab676SJeff Bonwick } 1473b24ab676SJeff Bonwick 1474b24ab676SJeff Bonwick if (wp & WP_DMU_SYNC) 1475b24ab676SJeff Bonwick dedup = 0; 1476b24ab676SJeff Bonwick 1477b24ab676SJeff Bonwick if (wp & WP_NOFILL) { 1478b24ab676SJeff Bonwick ASSERT(!ismd && level == 0); 1479b24ab676SJeff Bonwick checksum = ZIO_CHECKSUM_OFF; 1480b24ab676SJeff Bonwick compress = ZIO_COMPRESS_OFF; 1481b24ab676SJeff Bonwick dedup = B_FALSE; 1482b24ab676SJeff Bonwick } 1483b24ab676SJeff Bonwick 1484b24ab676SJeff Bonwick zp->zp_checksum = checksum; 1485b24ab676SJeff Bonwick zp->zp_compress = compress; 14860a586ceaSMark Shellenbaum zp->zp_type = (wp & WP_SPILL) ? dn->dn_bonustype : type; 1487b24ab676SJeff Bonwick zp->zp_level = level; 1488b24ab676SJeff Bonwick zp->zp_copies = MIN(copies + ismd, spa_max_replication(os->os_spa)); 1489b24ab676SJeff Bonwick zp->zp_dedup = dedup; 1490b24ab676SJeff Bonwick zp->zp_dedup_verify = dedup && dedup_verify; 1491b24ab676SJeff Bonwick } 1492b24ab676SJeff Bonwick 1493fa9e4066Sahrens int 1494fa9e4066Sahrens dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole, uint64_t *off) 1495fa9e4066Sahrens { 1496fa9e4066Sahrens dnode_t *dn; 1497fa9e4066Sahrens int i, err; 1498fa9e4066Sahrens 1499503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1500ea8dc4b6Seschrock if (err) 1501ea8dc4b6Seschrock return (err); 1502fa9e4066Sahrens /* 1503fa9e4066Sahrens * Sync any current changes before 1504fa9e4066Sahrens * we go trundling through the block pointers. 1505fa9e4066Sahrens */ 1506fa9e4066Sahrens for (i = 0; i < TXG_SIZE; i++) { 1507c543ec06Sahrens if (list_link_active(&dn->dn_dirty_link[i])) 1508fa9e4066Sahrens break; 1509fa9e4066Sahrens } 1510fa9e4066Sahrens if (i != TXG_SIZE) { 1511fa9e4066Sahrens dnode_rele(dn, FTAG); 1512fa9e4066Sahrens txg_wait_synced(dmu_objset_pool(os), 0); 1513503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1514ea8dc4b6Seschrock if (err) 1515ea8dc4b6Seschrock return (err); 1516fa9e4066Sahrens } 1517fa9e4066Sahrens 1518cdb0ab79Smaybee err = dnode_next_offset(dn, (hole ? DNODE_FIND_HOLE : 0), off, 1, 1, 0); 1519fa9e4066Sahrens dnode_rele(dn, FTAG); 1520fa9e4066Sahrens 1521fa9e4066Sahrens return (err); 1522fa9e4066Sahrens } 1523fa9e4066Sahrens 1524fa9e4066Sahrens void 1525fa9e4066Sahrens dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi) 1526fa9e4066Sahrens { 1527b24ab676SJeff Bonwick dnode_phys_t *dnp; 1528b24ab676SJeff Bonwick 1529fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 1530fa9e4066Sahrens mutex_enter(&dn->dn_mtx); 1531fa9e4066Sahrens 1532b24ab676SJeff Bonwick dnp = dn->dn_phys; 1533b24ab676SJeff Bonwick 1534fa9e4066Sahrens doi->doi_data_block_size = dn->dn_datablksz; 1535fa9e4066Sahrens doi->doi_metadata_block_size = dn->dn_indblkshift ? 1536fa9e4066Sahrens 1ULL << dn->dn_indblkshift : 0; 1537b24ab676SJeff Bonwick doi->doi_type = dn->dn_type; 1538b24ab676SJeff Bonwick doi->doi_bonus_type = dn->dn_bonustype; 1539b24ab676SJeff Bonwick doi->doi_bonus_size = dn->dn_bonuslen; 1540fa9e4066Sahrens doi->doi_indirection = dn->dn_nlevels; 1541fa9e4066Sahrens doi->doi_checksum = dn->dn_checksum; 1542fa9e4066Sahrens doi->doi_compress = dn->dn_compress; 1543b24ab676SJeff Bonwick doi->doi_physical_blocks_512 = (DN_USED_BYTES(dnp) + 256) >> 9; 1544b24ab676SJeff Bonwick doi->doi_max_offset = (dnp->dn_maxblkid + 1) * dn->dn_datablksz; 1545b24ab676SJeff Bonwick doi->doi_fill_count = 0; 1546b24ab676SJeff Bonwick for (int i = 0; i < dnp->dn_nblkptr; i++) 1547b24ab676SJeff Bonwick doi->doi_fill_count += dnp->dn_blkptr[i].blk_fill; 1548fa9e4066Sahrens 1549fa9e4066Sahrens mutex_exit(&dn->dn_mtx); 1550fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 1551fa9e4066Sahrens } 1552fa9e4066Sahrens 1553fa9e4066Sahrens /* 1554fa9e4066Sahrens * Get information on a DMU object. 1555fa9e4066Sahrens * If doi is NULL, just indicates whether the object exists. 1556fa9e4066Sahrens */ 1557fa9e4066Sahrens int 1558fa9e4066Sahrens dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi) 1559fa9e4066Sahrens { 1560ea8dc4b6Seschrock dnode_t *dn; 1561503ad85cSMatthew Ahrens int err = dnode_hold(os, object, FTAG, &dn); 1562fa9e4066Sahrens 1563ea8dc4b6Seschrock if (err) 1564ea8dc4b6Seschrock return (err); 1565fa9e4066Sahrens 1566fa9e4066Sahrens if (doi != NULL) 1567fa9e4066Sahrens dmu_object_info_from_dnode(dn, doi); 1568fa9e4066Sahrens 1569fa9e4066Sahrens dnode_rele(dn, FTAG); 1570fa9e4066Sahrens return (0); 1571fa9e4066Sahrens } 1572fa9e4066Sahrens 1573fa9e4066Sahrens /* 1574fa9e4066Sahrens * As above, but faster; can be used when you have a held dbuf in hand. 1575fa9e4066Sahrens */ 1576fa9e4066Sahrens void 1577fa9e4066Sahrens dmu_object_info_from_db(dmu_buf_t *db, dmu_object_info_t *doi) 1578fa9e4066Sahrens { 1579fa9e4066Sahrens dmu_object_info_from_dnode(((dmu_buf_impl_t *)db)->db_dnode, doi); 1580fa9e4066Sahrens } 1581fa9e4066Sahrens 1582fa9e4066Sahrens /* 1583fa9e4066Sahrens * Faster still when you only care about the size. 1584fa9e4066Sahrens * This is specifically optimized for zfs_getattr(). 1585fa9e4066Sahrens */ 1586fa9e4066Sahrens void 1587fa9e4066Sahrens dmu_object_size_from_db(dmu_buf_t *db, uint32_t *blksize, u_longlong_t *nblk512) 1588fa9e4066Sahrens { 1589fa9e4066Sahrens dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; 1590fa9e4066Sahrens 1591fa9e4066Sahrens *blksize = dn->dn_datablksz; 159299653d4eSeschrock /* add 1 for dnode space */ 159399653d4eSeschrock *nblk512 = ((DN_USED_BYTES(dn->dn_phys) + SPA_MINBLOCKSIZE/2) >> 159499653d4eSeschrock SPA_MINBLOCKSHIFT) + 1; 1595fa9e4066Sahrens } 1596fa9e4066Sahrens 1597fa9e4066Sahrens void 1598fa9e4066Sahrens byteswap_uint64_array(void *vbuf, size_t size) 1599fa9e4066Sahrens { 1600fa9e4066Sahrens uint64_t *buf = vbuf; 1601fa9e4066Sahrens size_t count = size >> 3; 1602fa9e4066Sahrens int i; 1603fa9e4066Sahrens 1604fa9e4066Sahrens ASSERT((size & 7) == 0); 1605fa9e4066Sahrens 1606fa9e4066Sahrens for (i = 0; i < count; i++) 1607fa9e4066Sahrens buf[i] = BSWAP_64(buf[i]); 1608fa9e4066Sahrens } 1609fa9e4066Sahrens 1610fa9e4066Sahrens void 1611fa9e4066Sahrens byteswap_uint32_array(void *vbuf, size_t size) 1612fa9e4066Sahrens { 1613fa9e4066Sahrens uint32_t *buf = vbuf; 1614fa9e4066Sahrens size_t count = size >> 2; 1615fa9e4066Sahrens int i; 1616fa9e4066Sahrens 1617fa9e4066Sahrens ASSERT((size & 3) == 0); 1618fa9e4066Sahrens 1619fa9e4066Sahrens for (i = 0; i < count; i++) 1620fa9e4066Sahrens buf[i] = BSWAP_32(buf[i]); 1621fa9e4066Sahrens } 1622fa9e4066Sahrens 1623fa9e4066Sahrens void 1624fa9e4066Sahrens byteswap_uint16_array(void *vbuf, size_t size) 1625fa9e4066Sahrens { 1626fa9e4066Sahrens uint16_t *buf = vbuf; 1627fa9e4066Sahrens size_t count = size >> 1; 1628fa9e4066Sahrens int i; 1629fa9e4066Sahrens 1630fa9e4066Sahrens ASSERT((size & 1) == 0); 1631fa9e4066Sahrens 1632fa9e4066Sahrens for (i = 0; i < count; i++) 1633fa9e4066Sahrens buf[i] = BSWAP_16(buf[i]); 1634fa9e4066Sahrens } 1635fa9e4066Sahrens 1636fa9e4066Sahrens /* ARGSUSED */ 1637fa9e4066Sahrens void 1638fa9e4066Sahrens byteswap_uint8_array(void *vbuf, size_t size) 1639fa9e4066Sahrens { 1640fa9e4066Sahrens } 1641fa9e4066Sahrens 1642fa9e4066Sahrens void 1643fa9e4066Sahrens dmu_init(void) 1644fa9e4066Sahrens { 16453f9d6ad7SLin Ling zfs_dbgmsg_init(); 1646fa9e4066Sahrens dbuf_init(); 1647fa9e4066Sahrens dnode_init(); 16487cbf8b43SRich Morris zfetch_init(); 1649fa9e4066Sahrens arc_init(); 1650fa94a07fSbrendan l2arc_init(); 1651c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_init(); 16520a586ceaSMark Shellenbaum sa_cache_init(); 1653fa9e4066Sahrens } 1654fa9e4066Sahrens 1655fa9e4066Sahrens void 1656fa9e4066Sahrens dmu_fini(void) 1657fa9e4066Sahrens { 1658fa9e4066Sahrens arc_fini(); 16597cbf8b43SRich Morris zfetch_fini(); 1660fa9e4066Sahrens dnode_fini(); 1661fa9e4066Sahrens dbuf_fini(); 1662fa94a07fSbrendan l2arc_fini(); 1663c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_fini(); 16640a586ceaSMark Shellenbaum sa_cache_fini(); 16653f9d6ad7SLin Ling zfs_dbgmsg_fini(); 1666fa9e4066Sahrens } 1667