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); 136*744947dcSTom Erickson *dbp = &db->db; /* NULL db plus first field offset is NULL */ 137ea8dc4b6Seschrock return (err); 138fa9e4066Sahrens } 139fa9e4066Sahrens 140fa9e4066Sahrens int 141fa9e4066Sahrens dmu_bonus_max(void) 142fa9e4066Sahrens { 143fa9e4066Sahrens return (DN_MAX_BONUSLEN); 144fa9e4066Sahrens } 145fa9e4066Sahrens 1461934e92fSmaybee int 147*744947dcSTom Erickson dmu_set_bonus(dmu_buf_t *db_fake, int newsize, dmu_tx_t *tx) 1481934e92fSmaybee { 149*744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 150*744947dcSTom Erickson dnode_t *dn; 151*744947dcSTom Erickson int error; 1521934e92fSmaybee 153*744947dcSTom Erickson DB_DNODE_ENTER(db); 154*744947dcSTom Erickson dn = DB_DNODE(db); 155*744947dcSTom Erickson 156*744947dcSTom Erickson if (dn->dn_bonus != db) { 157*744947dcSTom Erickson error = EINVAL; 158*744947dcSTom Erickson } else if (newsize < 0 || newsize > db_fake->db_size) { 159*744947dcSTom Erickson error = EINVAL; 160*744947dcSTom Erickson } else { 161*744947dcSTom Erickson dnode_setbonuslen(dn, newsize, tx); 162*744947dcSTom Erickson error = 0; 163*744947dcSTom Erickson } 164*744947dcSTom Erickson 165*744947dcSTom Erickson DB_DNODE_EXIT(db); 166*744947dcSTom Erickson return (error); 1671934e92fSmaybee } 1681934e92fSmaybee 1690a586ceaSMark Shellenbaum int 170*744947dcSTom Erickson dmu_set_bonustype(dmu_buf_t *db_fake, dmu_object_type_t type, dmu_tx_t *tx) 1710a586ceaSMark Shellenbaum { 172*744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 173*744947dcSTom Erickson dnode_t *dn; 174*744947dcSTom Erickson int error; 1750a586ceaSMark Shellenbaum 176*744947dcSTom Erickson DB_DNODE_ENTER(db); 177*744947dcSTom Erickson dn = DB_DNODE(db); 178*744947dcSTom Erickson 179*744947dcSTom Erickson if (type > DMU_OT_NUMTYPES) { 180*744947dcSTom Erickson error = EINVAL; 181*744947dcSTom Erickson } else if (dn->dn_bonus != db) { 182*744947dcSTom Erickson error = EINVAL; 183*744947dcSTom Erickson } else { 184*744947dcSTom Erickson dnode_setbonus_type(dn, type, tx); 185*744947dcSTom Erickson error = 0; 186*744947dcSTom Erickson } 1870a586ceaSMark Shellenbaum 188*744947dcSTom Erickson DB_DNODE_EXIT(db); 189*744947dcSTom Erickson return (error); 190*744947dcSTom Erickson } 1910a586ceaSMark Shellenbaum 192*744947dcSTom Erickson dmu_object_type_t 193*744947dcSTom Erickson dmu_get_bonustype(dmu_buf_t *db_fake) 194*744947dcSTom Erickson { 195*744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 196*744947dcSTom Erickson dnode_t *dn; 197*744947dcSTom Erickson dmu_object_type_t type; 198*744947dcSTom Erickson 199*744947dcSTom Erickson DB_DNODE_ENTER(db); 200*744947dcSTom Erickson dn = DB_DNODE(db); 201*744947dcSTom Erickson type = dn->dn_bonustype; 202*744947dcSTom Erickson DB_DNODE_EXIT(db); 203*744947dcSTom Erickson 204*744947dcSTom Erickson return (type); 2050a586ceaSMark Shellenbaum } 2060a586ceaSMark Shellenbaum 2070a586ceaSMark Shellenbaum int 2080a586ceaSMark Shellenbaum dmu_rm_spill(objset_t *os, uint64_t object, dmu_tx_t *tx) 2090a586ceaSMark Shellenbaum { 2100a586ceaSMark Shellenbaum dnode_t *dn; 2110a586ceaSMark Shellenbaum int error; 2120a586ceaSMark Shellenbaum 2130a586ceaSMark Shellenbaum error = dnode_hold(os, object, FTAG, &dn); 2140a586ceaSMark Shellenbaum dbuf_rm_spill(dn, tx); 21506e0070dSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 21606e0070dSMark Shellenbaum dnode_rm_spill(dn, tx); 21706e0070dSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 2180a586ceaSMark Shellenbaum dnode_rele(dn, FTAG); 2190a586ceaSMark Shellenbaum return (error); 2200a586ceaSMark Shellenbaum } 2210a586ceaSMark Shellenbaum 222fa9e4066Sahrens /* 223ea8dc4b6Seschrock * returns ENOENT, EIO, or 0. 224fa9e4066Sahrens */ 225ea8dc4b6Seschrock int 226ea8dc4b6Seschrock dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **dbp) 227fa9e4066Sahrens { 228ea8dc4b6Seschrock dnode_t *dn; 229fa9e4066Sahrens dmu_buf_impl_t *db; 2301934e92fSmaybee int error; 231fa9e4066Sahrens 232503ad85cSMatthew Ahrens error = dnode_hold(os, object, FTAG, &dn); 2331934e92fSmaybee if (error) 2341934e92fSmaybee return (error); 235fa9e4066Sahrens 236ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_READER); 237ea8dc4b6Seschrock if (dn->dn_bonus == NULL) { 238fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 239ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 240ea8dc4b6Seschrock if (dn->dn_bonus == NULL) 2411934e92fSmaybee dbuf_create_bonus(dn); 242fa9e4066Sahrens } 243ea8dc4b6Seschrock db = dn->dn_bonus; 2441934e92fSmaybee 2451934e92fSmaybee /* as long as the bonus buf is held, the dnode will be held */ 246*744947dcSTom Erickson if (refcount_add(&db->db_holds, tag) == 1) { 2471934e92fSmaybee VERIFY(dnode_add_ref(dn, db)); 248*744947dcSTom Erickson (void) atomic_inc_32_nv(&dn->dn_dbufs_count); 249*744947dcSTom Erickson } 250*744947dcSTom Erickson 251*744947dcSTom Erickson /* 252*744947dcSTom Erickson * Wait to drop dn_struct_rwlock until after adding the bonus dbuf's 253*744947dcSTom Erickson * hold and incrementing the dbuf count to ensure that dnode_move() sees 254*744947dcSTom Erickson * a dnode hold for every dbuf. 255*744947dcSTom Erickson */ 256*744947dcSTom Erickson rw_exit(&dn->dn_struct_rwlock); 2571934e92fSmaybee 258fa9e4066Sahrens dnode_rele(dn, FTAG); 259ea8dc4b6Seschrock 26047cb52daSJeff Bonwick VERIFY(0 == dbuf_read(db, NULL, DB_RF_MUST_SUCCEED | DB_RF_NOPREFETCH)); 261ea8dc4b6Seschrock 262ea8dc4b6Seschrock *dbp = &db->db; 263ea8dc4b6Seschrock return (0); 264fa9e4066Sahrens } 265fa9e4066Sahrens 2660a586ceaSMark Shellenbaum /* 2670a586ceaSMark Shellenbaum * returns ENOENT, EIO, or 0. 2680a586ceaSMark Shellenbaum * 2690a586ceaSMark Shellenbaum * This interface will allocate a blank spill dbuf when a spill blk 2700a586ceaSMark Shellenbaum * doesn't already exist on the dnode. 2710a586ceaSMark Shellenbaum * 2720a586ceaSMark Shellenbaum * if you only want to find an already existing spill db, then 2730a586ceaSMark Shellenbaum * dmu_spill_hold_existing() should be used. 2740a586ceaSMark Shellenbaum */ 2750a586ceaSMark Shellenbaum int 2760a586ceaSMark Shellenbaum dmu_spill_hold_by_dnode(dnode_t *dn, uint32_t flags, void *tag, dmu_buf_t **dbp) 2770a586ceaSMark Shellenbaum { 2780a586ceaSMark Shellenbaum dmu_buf_impl_t *db = NULL; 2790a586ceaSMark Shellenbaum int err; 2800a586ceaSMark Shellenbaum 2810a586ceaSMark Shellenbaum if ((flags & DB_RF_HAVESTRUCT) == 0) 2820a586ceaSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_READER); 2830a586ceaSMark Shellenbaum 2840a586ceaSMark Shellenbaum db = dbuf_hold(dn, DMU_SPILL_BLKID, tag); 2850a586ceaSMark Shellenbaum 2860a586ceaSMark Shellenbaum if ((flags & DB_RF_HAVESTRUCT) == 0) 2870a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 2880a586ceaSMark Shellenbaum 2890a586ceaSMark Shellenbaum ASSERT(db != NULL); 2901d8ccc7bSMark Shellenbaum err = dbuf_read(db, NULL, flags); 2911d8ccc7bSMark Shellenbaum if (err == 0) 2921d8ccc7bSMark Shellenbaum *dbp = &db->db; 2931d8ccc7bSMark Shellenbaum else 2941d8ccc7bSMark Shellenbaum dbuf_rele(db, tag); 2950a586ceaSMark Shellenbaum return (err); 2960a586ceaSMark Shellenbaum } 2970a586ceaSMark Shellenbaum 2980a586ceaSMark Shellenbaum int 2990a586ceaSMark Shellenbaum dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) 3000a586ceaSMark Shellenbaum { 301*744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)bonus; 302*744947dcSTom Erickson dnode_t *dn; 3030a586ceaSMark Shellenbaum int err; 3040a586ceaSMark Shellenbaum 305*744947dcSTom Erickson DB_DNODE_ENTER(db); 306*744947dcSTom Erickson dn = DB_DNODE(db); 307*744947dcSTom Erickson 308*744947dcSTom Erickson if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_SA) { 309*744947dcSTom Erickson err = EINVAL; 310*744947dcSTom Erickson } else { 311*744947dcSTom Erickson rw_enter(&dn->dn_struct_rwlock, RW_READER); 312*744947dcSTom Erickson 313*744947dcSTom Erickson if (!dn->dn_have_spill) { 314*744947dcSTom Erickson err = ENOENT; 315*744947dcSTom Erickson } else { 316*744947dcSTom Erickson err = dmu_spill_hold_by_dnode(dn, 317*744947dcSTom Erickson DB_RF_HAVESTRUCT | DB_RF_CANFAIL, tag, dbp); 318*744947dcSTom Erickson } 3190a586ceaSMark Shellenbaum 3200a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 3210a586ceaSMark Shellenbaum } 322*744947dcSTom Erickson 323*744947dcSTom Erickson DB_DNODE_EXIT(db); 3240a586ceaSMark Shellenbaum return (err); 3250a586ceaSMark Shellenbaum } 3260a586ceaSMark Shellenbaum 3270a586ceaSMark Shellenbaum int 3280a586ceaSMark Shellenbaum dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) 3290a586ceaSMark Shellenbaum { 330*744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)bonus; 331*744947dcSTom Erickson dnode_t *dn; 332*744947dcSTom Erickson int err; 333*744947dcSTom Erickson 334*744947dcSTom Erickson DB_DNODE_ENTER(db); 335*744947dcSTom Erickson dn = DB_DNODE(db); 336*744947dcSTom Erickson err = dmu_spill_hold_by_dnode(dn, DB_RF_CANFAIL, tag, dbp); 337*744947dcSTom Erickson DB_DNODE_EXIT(db); 338*744947dcSTom Erickson 339*744947dcSTom Erickson return (err); 3400a586ceaSMark Shellenbaum } 3410a586ceaSMark Shellenbaum 34213506d1eSmaybee /* 34313506d1eSmaybee * Note: longer-term, we should modify all of the dmu_buf_*() interfaces 34413506d1eSmaybee * to take a held dnode rather than <os, object> -- the lookup is wasteful, 34513506d1eSmaybee * and can induce severe lock contention when writing to several files 34613506d1eSmaybee * whose dnodes are in the same block. 34713506d1eSmaybee */ 34813506d1eSmaybee static int 3497bfdf011SNeil Perrin dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset, uint64_t length, 3507bfdf011SNeil Perrin int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp, uint32_t flags) 351fa9e4066Sahrens { 35205715f94SMark Maybee dsl_pool_t *dp = NULL; 353fa9e4066Sahrens dmu_buf_t **dbp; 354fa9e4066Sahrens uint64_t blkid, nblks, i; 3557bfdf011SNeil Perrin uint32_t dbuf_flags; 356ea8dc4b6Seschrock int err; 357ea8dc4b6Seschrock zio_t *zio; 35805715f94SMark Maybee hrtime_t start; 359ea8dc4b6Seschrock 360ea8dc4b6Seschrock ASSERT(length <= DMU_MAX_ACCESS); 361fa9e4066Sahrens 362c87b8fc5SMark J Musante dbuf_flags = DB_RF_CANFAIL | DB_RF_NEVERWAIT | DB_RF_HAVESTRUCT; 3637bfdf011SNeil Perrin if (flags & DMU_READ_NO_PREFETCH || length > zfetch_array_rd_sz) 3647bfdf011SNeil Perrin dbuf_flags |= DB_RF_NOPREFETCH; 365ea8dc4b6Seschrock 366fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 367fa9e4066Sahrens if (dn->dn_datablkshift) { 368fa9e4066Sahrens int blkshift = dn->dn_datablkshift; 369fa9e4066Sahrens nblks = (P2ROUNDUP(offset+length, 1ULL<<blkshift) - 370b1b8ab34Slling P2ALIGN(offset, 1ULL<<blkshift)) >> blkshift; 371fa9e4066Sahrens } else { 3720125049cSahrens if (offset + length > dn->dn_datablksz) { 3730125049cSahrens zfs_panic_recover("zfs: accessing past end of object " 3740125049cSahrens "%llx/%llx (size=%u access=%llu+%llu)", 3750125049cSahrens (longlong_t)dn->dn_objset-> 3760125049cSahrens os_dsl_dataset->ds_object, 3770125049cSahrens (longlong_t)dn->dn_object, dn->dn_datablksz, 3780125049cSahrens (longlong_t)offset, (longlong_t)length); 379c87b8fc5SMark J Musante rw_exit(&dn->dn_struct_rwlock); 3800125049cSahrens return (EIO); 3810125049cSahrens } 382fa9e4066Sahrens nblks = 1; 383fa9e4066Sahrens } 384ea8dc4b6Seschrock dbp = kmem_zalloc(sizeof (dmu_buf_t *) * nblks, KM_SLEEP); 385fa9e4066Sahrens 38605715f94SMark Maybee if (dn->dn_objset->os_dsl_dataset) 38705715f94SMark Maybee dp = dn->dn_objset->os_dsl_dataset->ds_dir->dd_pool; 38805715f94SMark Maybee if (dp && dsl_pool_sync_context(dp)) 38905715f94SMark Maybee start = gethrtime(); 390e14bb325SJeff Bonwick zio = zio_root(dn->dn_objset->os_spa, NULL, NULL, ZIO_FLAG_CANFAIL); 391fa9e4066Sahrens blkid = dbuf_whichblock(dn, offset); 392fa9e4066Sahrens for (i = 0; i < nblks; i++) { 393ea8dc4b6Seschrock dmu_buf_impl_t *db = dbuf_hold(dn, blkid+i, tag); 394ea8dc4b6Seschrock if (db == NULL) { 395ea8dc4b6Seschrock rw_exit(&dn->dn_struct_rwlock); 396ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 397ea8dc4b6Seschrock zio_nowait(zio); 398ea8dc4b6Seschrock return (EIO); 399ea8dc4b6Seschrock } 400ea8dc4b6Seschrock /* initiate async i/o */ 40113506d1eSmaybee if (read) { 4027bfdf011SNeil Perrin (void) dbuf_read(db, zio, dbuf_flags); 403ea8dc4b6Seschrock } 404ea8dc4b6Seschrock dbp[i] = &db->db; 405fa9e4066Sahrens } 406fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 407fa9e4066Sahrens 408ea8dc4b6Seschrock /* wait for async i/o */ 409ea8dc4b6Seschrock err = zio_wait(zio); 41005715f94SMark Maybee /* track read overhead when we are in sync context */ 41105715f94SMark Maybee if (dp && dsl_pool_sync_context(dp)) 41205715f94SMark Maybee dp->dp_read_overhead += gethrtime() - start; 413ea8dc4b6Seschrock if (err) { 414ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 415ea8dc4b6Seschrock return (err); 416ea8dc4b6Seschrock } 417fa9e4066Sahrens 418ea8dc4b6Seschrock /* wait for other io to complete */ 419ea8dc4b6Seschrock if (read) { 420ea8dc4b6Seschrock for (i = 0; i < nblks; i++) { 421ea8dc4b6Seschrock dmu_buf_impl_t *db = (dmu_buf_impl_t *)dbp[i]; 422ea8dc4b6Seschrock mutex_enter(&db->db_mtx); 423ea8dc4b6Seschrock while (db->db_state == DB_READ || 424ea8dc4b6Seschrock db->db_state == DB_FILL) 425ea8dc4b6Seschrock cv_wait(&db->db_changed, &db->db_mtx); 426ea8dc4b6Seschrock if (db->db_state == DB_UNCACHED) 427ea8dc4b6Seschrock err = EIO; 428ea8dc4b6Seschrock mutex_exit(&db->db_mtx); 429ea8dc4b6Seschrock if (err) { 430ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 431ea8dc4b6Seschrock return (err); 432ea8dc4b6Seschrock } 433ea8dc4b6Seschrock } 434ea8dc4b6Seschrock } 435fa9e4066Sahrens 436ea8dc4b6Seschrock *numbufsp = nblks; 437ea8dc4b6Seschrock *dbpp = dbp; 438ea8dc4b6Seschrock return (0); 439fa9e4066Sahrens } 440fa9e4066Sahrens 441a2eea2e1Sahrens static int 44213506d1eSmaybee dmu_buf_hold_array(objset_t *os, uint64_t object, uint64_t offset, 44313506d1eSmaybee uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) 44413506d1eSmaybee { 44513506d1eSmaybee dnode_t *dn; 44613506d1eSmaybee int err; 44713506d1eSmaybee 448503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 44913506d1eSmaybee if (err) 45013506d1eSmaybee return (err); 45113506d1eSmaybee 45213506d1eSmaybee err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, 4537bfdf011SNeil Perrin numbufsp, dbpp, DMU_READ_PREFETCH); 45413506d1eSmaybee 45513506d1eSmaybee dnode_rele(dn, FTAG); 45613506d1eSmaybee 45713506d1eSmaybee return (err); 45813506d1eSmaybee } 45913506d1eSmaybee 46013506d1eSmaybee int 461*744947dcSTom Erickson dmu_buf_hold_array_by_bonus(dmu_buf_t *db_fake, uint64_t offset, 46213506d1eSmaybee uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) 46313506d1eSmaybee { 464*744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 465*744947dcSTom Erickson dnode_t *dn; 46613506d1eSmaybee int err; 46713506d1eSmaybee 468*744947dcSTom Erickson DB_DNODE_ENTER(db); 469*744947dcSTom Erickson dn = DB_DNODE(db); 47013506d1eSmaybee err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, 4717bfdf011SNeil Perrin numbufsp, dbpp, DMU_READ_PREFETCH); 472*744947dcSTom Erickson DB_DNODE_EXIT(db); 47313506d1eSmaybee 47413506d1eSmaybee return (err); 47513506d1eSmaybee } 47613506d1eSmaybee 477fa9e4066Sahrens void 478ea8dc4b6Seschrock dmu_buf_rele_array(dmu_buf_t **dbp_fake, int numbufs, void *tag) 479fa9e4066Sahrens { 480fa9e4066Sahrens int i; 481fa9e4066Sahrens dmu_buf_impl_t **dbp = (dmu_buf_impl_t **)dbp_fake; 482fa9e4066Sahrens 483fa9e4066Sahrens if (numbufs == 0) 484fa9e4066Sahrens return; 485fa9e4066Sahrens 486ea8dc4b6Seschrock for (i = 0; i < numbufs; i++) { 487ea8dc4b6Seschrock if (dbp[i]) 488ea8dc4b6Seschrock dbuf_rele(dbp[i], tag); 489ea8dc4b6Seschrock } 490fa9e4066Sahrens 491fa9e4066Sahrens kmem_free(dbp, sizeof (dmu_buf_t *) * numbufs); 492fa9e4066Sahrens } 493fa9e4066Sahrens 494fa9e4066Sahrens void 495fa9e4066Sahrens dmu_prefetch(objset_t *os, uint64_t object, uint64_t offset, uint64_t len) 496fa9e4066Sahrens { 497fa9e4066Sahrens dnode_t *dn; 498fa9e4066Sahrens uint64_t blkid; 499ea8dc4b6Seschrock int nblks, i, err; 500fa9e4066Sahrens 501416e0cd8Sek if (zfs_prefetch_disable) 502416e0cd8Sek return; 503416e0cd8Sek 504fa9e4066Sahrens if (len == 0) { /* they're interested in the bonus buffer */ 505*744947dcSTom Erickson dn = DMU_META_DNODE(os); 506fa9e4066Sahrens 507fa9e4066Sahrens if (object == 0 || object >= DN_MAX_OBJECT) 508fa9e4066Sahrens return; 509fa9e4066Sahrens 510fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 511fa9e4066Sahrens blkid = dbuf_whichblock(dn, object * sizeof (dnode_phys_t)); 512fa9e4066Sahrens dbuf_prefetch(dn, blkid); 513fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 514fa9e4066Sahrens return; 515fa9e4066Sahrens } 516fa9e4066Sahrens 517fa9e4066Sahrens /* 518fa9e4066Sahrens * XXX - Note, if the dnode for the requested object is not 519fa9e4066Sahrens * already cached, we will do a *synchronous* read in the 520fa9e4066Sahrens * dnode_hold() call. The same is true for any indirects. 521fa9e4066Sahrens */ 522503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 523ea8dc4b6Seschrock if (err != 0) 524fa9e4066Sahrens return; 525fa9e4066Sahrens 526fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 527fa9e4066Sahrens if (dn->dn_datablkshift) { 528fa9e4066Sahrens int blkshift = dn->dn_datablkshift; 529fa9e4066Sahrens nblks = (P2ROUNDUP(offset+len, 1<<blkshift) - 530b1b8ab34Slling P2ALIGN(offset, 1<<blkshift)) >> blkshift; 531fa9e4066Sahrens } else { 532fa9e4066Sahrens nblks = (offset < dn->dn_datablksz); 533fa9e4066Sahrens } 534fa9e4066Sahrens 535fa9e4066Sahrens if (nblks != 0) { 536fa9e4066Sahrens blkid = dbuf_whichblock(dn, offset); 537fa9e4066Sahrens for (i = 0; i < nblks; i++) 538fa9e4066Sahrens dbuf_prefetch(dn, blkid+i); 539fa9e4066Sahrens } 540fa9e4066Sahrens 541fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 542fa9e4066Sahrens 543fa9e4066Sahrens dnode_rele(dn, FTAG); 544fa9e4066Sahrens } 545fa9e4066Sahrens 54676256205SMark Maybee /* 54776256205SMark Maybee * Get the next "chunk" of file data to free. We traverse the file from 54876256205SMark Maybee * the end so that the file gets shorter over time (if we crashes in the 54976256205SMark Maybee * middle, this will leave us in a better state). We find allocated file 55076256205SMark Maybee * data by simply searching the allocated level 1 indirects. 55176256205SMark Maybee */ 552cdb0ab79Smaybee static int 55376256205SMark Maybee get_next_chunk(dnode_t *dn, uint64_t *start, uint64_t limit) 554cdb0ab79Smaybee { 55576256205SMark Maybee uint64_t len = *start - limit; 55676256205SMark Maybee uint64_t blkcnt = 0; 55776256205SMark Maybee uint64_t maxblks = DMU_MAX_ACCESS / (1ULL << (dn->dn_indblkshift + 1)); 55876256205SMark Maybee uint64_t iblkrange = 5591c8564a7SMark Maybee dn->dn_datablksz * EPB(dn->dn_indblkshift, SPA_BLKPTRSHIFT); 560cdb0ab79Smaybee 56176256205SMark Maybee ASSERT(limit <= *start); 562cdb0ab79Smaybee 56376256205SMark Maybee if (len <= iblkrange * maxblks) { 56476256205SMark Maybee *start = limit; 565cdb0ab79Smaybee return (0); 566cdb0ab79Smaybee } 56776256205SMark Maybee ASSERT(ISP2(iblkrange)); 568cdb0ab79Smaybee 56976256205SMark Maybee while (*start > limit && blkcnt < maxblks) { 5701c8564a7SMark Maybee int err; 571cdb0ab79Smaybee 57276256205SMark Maybee /* find next allocated L1 indirect */ 573cdb0ab79Smaybee err = dnode_next_offset(dn, 57476256205SMark Maybee DNODE_FIND_BACKWARDS, start, 2, 1, 0); 575cdb0ab79Smaybee 57676256205SMark Maybee /* if there are no more, then we are done */ 57776256205SMark Maybee if (err == ESRCH) { 57876256205SMark Maybee *start = limit; 579cdb0ab79Smaybee return (0); 58076256205SMark Maybee } else if (err) { 581cdb0ab79Smaybee return (err); 58276256205SMark Maybee } 58376256205SMark Maybee blkcnt += 1; 58476256205SMark Maybee 58576256205SMark Maybee /* reset offset to end of "next" block back */ 58676256205SMark Maybee *start = P2ALIGN(*start, iblkrange); 58776256205SMark Maybee if (*start <= limit) 58876256205SMark Maybee *start = limit; 58976256205SMark Maybee else 59076256205SMark Maybee *start -= 1; 591cdb0ab79Smaybee } 592cdb0ab79Smaybee return (0); 593cdb0ab79Smaybee } 594cdb0ab79Smaybee 595cdb0ab79Smaybee static int 596cdb0ab79Smaybee dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset, 597cdb0ab79Smaybee uint64_t length, boolean_t free_dnode) 598cdb0ab79Smaybee { 599cdb0ab79Smaybee dmu_tx_t *tx; 600cdb0ab79Smaybee uint64_t object_size, start, end, len; 601cdb0ab79Smaybee boolean_t trunc = (length == DMU_OBJECT_END); 602cdb0ab79Smaybee int align, err; 603cdb0ab79Smaybee 604cdb0ab79Smaybee align = 1 << dn->dn_datablkshift; 605cdb0ab79Smaybee ASSERT(align > 0); 606cdb0ab79Smaybee object_size = align == 1 ? dn->dn_datablksz : 607cdb0ab79Smaybee (dn->dn_maxblkid + 1) << dn->dn_datablkshift; 608cdb0ab79Smaybee 60914843421SMatthew Ahrens end = offset + length; 61014843421SMatthew Ahrens if (trunc || end > object_size) 611cdb0ab79Smaybee end = object_size; 612cdb0ab79Smaybee if (end <= offset) 613cdb0ab79Smaybee return (0); 614cdb0ab79Smaybee length = end - offset; 615cdb0ab79Smaybee 616cdb0ab79Smaybee while (length) { 617cdb0ab79Smaybee start = end; 61814843421SMatthew Ahrens /* assert(offset <= start) */ 619cdb0ab79Smaybee err = get_next_chunk(dn, &start, offset); 620cdb0ab79Smaybee if (err) 621cdb0ab79Smaybee return (err); 622cdb0ab79Smaybee len = trunc ? DMU_OBJECT_END : end - start; 623cdb0ab79Smaybee 624cdb0ab79Smaybee tx = dmu_tx_create(os); 625cdb0ab79Smaybee dmu_tx_hold_free(tx, dn->dn_object, start, len); 626cdb0ab79Smaybee err = dmu_tx_assign(tx, TXG_WAIT); 627cdb0ab79Smaybee if (err) { 628cdb0ab79Smaybee dmu_tx_abort(tx); 629cdb0ab79Smaybee return (err); 630cdb0ab79Smaybee } 631cdb0ab79Smaybee 632cdb0ab79Smaybee dnode_free_range(dn, start, trunc ? -1 : len, tx); 633cdb0ab79Smaybee 6341c8564a7SMark Maybee if (start == 0 && free_dnode) { 6351c8564a7SMark Maybee ASSERT(trunc); 636cdb0ab79Smaybee dnode_free(dn, tx); 6371c8564a7SMark Maybee } 638cdb0ab79Smaybee 639cdb0ab79Smaybee length -= end - start; 640cdb0ab79Smaybee 641cdb0ab79Smaybee dmu_tx_commit(tx); 642cdb0ab79Smaybee end = start; 643cdb0ab79Smaybee } 644cdb0ab79Smaybee return (0); 645cdb0ab79Smaybee } 646cdb0ab79Smaybee 647cdb0ab79Smaybee int 648cdb0ab79Smaybee dmu_free_long_range(objset_t *os, uint64_t object, 649cdb0ab79Smaybee uint64_t offset, uint64_t length) 650cdb0ab79Smaybee { 651cdb0ab79Smaybee dnode_t *dn; 652cdb0ab79Smaybee int err; 653cdb0ab79Smaybee 654503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 655cdb0ab79Smaybee if (err != 0) 656cdb0ab79Smaybee return (err); 657cdb0ab79Smaybee err = dmu_free_long_range_impl(os, dn, offset, length, FALSE); 658cdb0ab79Smaybee dnode_rele(dn, FTAG); 659cdb0ab79Smaybee return (err); 660cdb0ab79Smaybee } 661cdb0ab79Smaybee 662cdb0ab79Smaybee int 663cdb0ab79Smaybee dmu_free_object(objset_t *os, uint64_t object) 664cdb0ab79Smaybee { 665cdb0ab79Smaybee dnode_t *dn; 666cdb0ab79Smaybee dmu_tx_t *tx; 667cdb0ab79Smaybee int err; 668cdb0ab79Smaybee 669503ad85cSMatthew Ahrens err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, 670cdb0ab79Smaybee FTAG, &dn); 671cdb0ab79Smaybee if (err != 0) 672cdb0ab79Smaybee return (err); 673cdb0ab79Smaybee if (dn->dn_nlevels == 1) { 674cdb0ab79Smaybee tx = dmu_tx_create(os); 675cdb0ab79Smaybee dmu_tx_hold_bonus(tx, object); 676cdb0ab79Smaybee dmu_tx_hold_free(tx, dn->dn_object, 0, DMU_OBJECT_END); 677cdb0ab79Smaybee err = dmu_tx_assign(tx, TXG_WAIT); 678cdb0ab79Smaybee if (err == 0) { 679cdb0ab79Smaybee dnode_free_range(dn, 0, DMU_OBJECT_END, tx); 680cdb0ab79Smaybee dnode_free(dn, tx); 681cdb0ab79Smaybee dmu_tx_commit(tx); 682cdb0ab79Smaybee } else { 683cdb0ab79Smaybee dmu_tx_abort(tx); 684cdb0ab79Smaybee } 685cdb0ab79Smaybee } else { 686cdb0ab79Smaybee err = dmu_free_long_range_impl(os, dn, 0, DMU_OBJECT_END, TRUE); 687cdb0ab79Smaybee } 688cdb0ab79Smaybee dnode_rele(dn, FTAG); 689cdb0ab79Smaybee return (err); 690cdb0ab79Smaybee } 691cdb0ab79Smaybee 692ea8dc4b6Seschrock int 693fa9e4066Sahrens dmu_free_range(objset_t *os, uint64_t object, uint64_t offset, 694fa9e4066Sahrens uint64_t size, dmu_tx_t *tx) 695fa9e4066Sahrens { 696ea8dc4b6Seschrock dnode_t *dn; 697503ad85cSMatthew Ahrens int err = dnode_hold(os, object, FTAG, &dn); 698ea8dc4b6Seschrock if (err) 699ea8dc4b6Seschrock return (err); 700fa9e4066Sahrens ASSERT(offset < UINT64_MAX); 701fa9e4066Sahrens ASSERT(size == -1ULL || size <= UINT64_MAX - offset); 702fa9e4066Sahrens dnode_free_range(dn, offset, size, tx); 703fa9e4066Sahrens dnode_rele(dn, FTAG); 704ea8dc4b6Seschrock return (0); 705fa9e4066Sahrens } 706fa9e4066Sahrens 707ea8dc4b6Seschrock int 708ea8dc4b6Seschrock dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 7097bfdf011SNeil Perrin void *buf, uint32_t flags) 710fa9e4066Sahrens { 711fa9e4066Sahrens dnode_t *dn; 712fa9e4066Sahrens dmu_buf_t **dbp; 713c87b8fc5SMark J Musante int numbufs, err; 714fa9e4066Sahrens 715503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 716ea8dc4b6Seschrock if (err) 717ea8dc4b6Seschrock return (err); 718feb08c6bSbillm 719feb08c6bSbillm /* 720feb08c6bSbillm * Deal with odd block sizes, where there can't be data past the first 721feb08c6bSbillm * block. If we ever do the tail block optimization, we will need to 722feb08c6bSbillm * handle that here as well. 723feb08c6bSbillm */ 724c87b8fc5SMark J Musante if (dn->dn_maxblkid == 0) { 725fa9e4066Sahrens int newsz = offset > dn->dn_datablksz ? 0 : 726fa9e4066Sahrens MIN(size, dn->dn_datablksz - offset); 727fa9e4066Sahrens bzero((char *)buf + newsz, size - newsz); 728fa9e4066Sahrens size = newsz; 729fa9e4066Sahrens } 730fa9e4066Sahrens 731fa9e4066Sahrens while (size > 0) { 732fa9e4066Sahrens uint64_t mylen = MIN(size, DMU_MAX_ACCESS / 2); 733c87b8fc5SMark J Musante int i; 734fa9e4066Sahrens 735fa9e4066Sahrens /* 736fa9e4066Sahrens * NB: we could do this block-at-a-time, but it's nice 737fa9e4066Sahrens * to be reading in parallel. 738fa9e4066Sahrens */ 739a2eea2e1Sahrens err = dmu_buf_hold_array_by_dnode(dn, offset, mylen, 7407bfdf011SNeil Perrin TRUE, FTAG, &numbufs, &dbp, flags); 741ea8dc4b6Seschrock if (err) 7421934e92fSmaybee break; 743fa9e4066Sahrens 744fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 745fa9e4066Sahrens int tocpy; 746fa9e4066Sahrens int bufoff; 747fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 748fa9e4066Sahrens 749fa9e4066Sahrens ASSERT(size > 0); 750fa9e4066Sahrens 751fa9e4066Sahrens bufoff = offset - db->db_offset; 752fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 753fa9e4066Sahrens 754fa9e4066Sahrens bcopy((char *)db->db_data + bufoff, buf, tocpy); 755fa9e4066Sahrens 756fa9e4066Sahrens offset += tocpy; 757fa9e4066Sahrens size -= tocpy; 758fa9e4066Sahrens buf = (char *)buf + tocpy; 759fa9e4066Sahrens } 760ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 761fa9e4066Sahrens } 762a2eea2e1Sahrens dnode_rele(dn, FTAG); 7631934e92fSmaybee return (err); 764fa9e4066Sahrens } 765fa9e4066Sahrens 766fa9e4066Sahrens void 767fa9e4066Sahrens dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 768fa9e4066Sahrens const void *buf, dmu_tx_t *tx) 769fa9e4066Sahrens { 770fa9e4066Sahrens dmu_buf_t **dbp; 771fa9e4066Sahrens int numbufs, i; 772fa9e4066Sahrens 77313506d1eSmaybee if (size == 0) 77413506d1eSmaybee return; 77513506d1eSmaybee 776ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, 777ea8dc4b6Seschrock FALSE, FTAG, &numbufs, &dbp)); 778fa9e4066Sahrens 779fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 780fa9e4066Sahrens int tocpy; 781fa9e4066Sahrens int bufoff; 782fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 783fa9e4066Sahrens 784fa9e4066Sahrens ASSERT(size > 0); 785fa9e4066Sahrens 786fa9e4066Sahrens bufoff = offset - db->db_offset; 787fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 788fa9e4066Sahrens 789fa9e4066Sahrens ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 790fa9e4066Sahrens 791fa9e4066Sahrens if (tocpy == db->db_size) 792fa9e4066Sahrens dmu_buf_will_fill(db, tx); 793fa9e4066Sahrens else 794fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 795fa9e4066Sahrens 796fa9e4066Sahrens bcopy(buf, (char *)db->db_data + bufoff, tocpy); 797fa9e4066Sahrens 798fa9e4066Sahrens if (tocpy == db->db_size) 799fa9e4066Sahrens dmu_buf_fill_done(db, tx); 800fa9e4066Sahrens 801fa9e4066Sahrens offset += tocpy; 802fa9e4066Sahrens size -= tocpy; 803fa9e4066Sahrens buf = (char *)buf + tocpy; 804fa9e4066Sahrens } 805ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 806fa9e4066Sahrens } 807fa9e4066Sahrens 80882c9918fSTim Haley void 80982c9918fSTim Haley dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 81082c9918fSTim Haley dmu_tx_t *tx) 81182c9918fSTim Haley { 81282c9918fSTim Haley dmu_buf_t **dbp; 81382c9918fSTim Haley int numbufs, i; 81482c9918fSTim Haley 81582c9918fSTim Haley if (size == 0) 81682c9918fSTim Haley return; 81782c9918fSTim Haley 81882c9918fSTim Haley VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, 81982c9918fSTim Haley FALSE, FTAG, &numbufs, &dbp)); 82082c9918fSTim Haley 82182c9918fSTim Haley for (i = 0; i < numbufs; i++) { 82282c9918fSTim Haley dmu_buf_t *db = dbp[i]; 82382c9918fSTim Haley 82482c9918fSTim Haley dmu_buf_will_not_fill(db, tx); 82582c9918fSTim Haley } 82682c9918fSTim Haley dmu_buf_rele_array(dbp, numbufs, FTAG); 82782c9918fSTim Haley } 82882c9918fSTim Haley 829c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 830c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * DMU support for xuio 831c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 832c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_t *xuio_ksp = NULL; 833c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 834c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 835c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_init(xuio_t *xuio, int nblk) 836c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 837c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv; 838c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 839c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 840c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_iovcnt = nblk; 841c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_iov = kmem_zalloc(nblk * sizeof (iovec_t), KM_SLEEP); 842c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 843c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv = kmem_zalloc(sizeof (dmu_xuio_t), KM_SLEEP); 844c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->cnt = nblk; 845c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs = kmem_zalloc(nblk * sizeof (arc_buf_t *), KM_SLEEP); 846c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->iovp = uio->uio_iov; 847c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIO_XUZC_PRIV(xuio) = priv; 848c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 849c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (XUIO_XUZC_RW(xuio) == UIO_READ) 850c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_rbuf, nblk); 851c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 852c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_wbuf, nblk); 853c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 854c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 855c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 856c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 857c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 858c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_fini(xuio_t *xuio) 859c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 860c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 861c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int nblk = priv->cnt; 862c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 863c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv->iovp, nblk * sizeof (iovec_t)); 864c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv->bufs, nblk * sizeof (arc_buf_t *)); 865c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv, sizeof (dmu_xuio_t)); 866c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 867c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (XUIO_XUZC_RW(xuio) == UIO_READ) 868c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_rbuf, -nblk); 869c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 870c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_wbuf, -nblk); 871c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 872c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 873c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 874c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Initialize iov[priv->next] and priv->bufs[priv->next] with { off, n, abuf } 875c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * and increase priv->next by 1. 876c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 877c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 878c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_add(xuio_t *xuio, arc_buf_t *abuf, offset_t off, size_t n) 879c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 880c242f9a0Schunli zhang - Sun Microsystems - Irvine United States struct iovec *iov; 881c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 882c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 883c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int i = priv->next++; 884c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 885c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 886c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(off + n <= arc_buf_size(abuf)); 887c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov = uio->uio_iov + i; 888c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov->iov_base = (char *)abuf->b_data + off; 889c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov->iov_len = n; 890c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs[i] = abuf; 891c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 892c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 893c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 894c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 895c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_cnt(xuio_t *xuio) 896c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 897c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 898c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (priv->cnt); 899c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 900c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 901c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t * 902c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_arcbuf(xuio_t *xuio, int i) 903c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 904c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 905c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 906c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 907c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (priv->bufs[i]); 908c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 909c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 910c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 911c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_clear(xuio_t *xuio, int i) 912c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 913c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 914c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 915c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 916c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs[i] = NULL; 917c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 918c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 919c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static void 920c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_init(void) 921c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 922c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp = kstat_create("zfs", 0, "xuio_stats", "misc", 923c242f9a0Schunli zhang - Sun Microsystems - Irvine United States KSTAT_TYPE_NAMED, sizeof (xuio_stats) / sizeof (kstat_named_t), 924c242f9a0Schunli zhang - Sun Microsystems - Irvine United States KSTAT_FLAG_VIRTUAL); 925c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio_ksp != NULL) { 926c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp->ks_data = &xuio_stats; 927c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_install(xuio_ksp); 928c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 929c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 930c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 931c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static void 932c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_fini(void) 933c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 934c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio_ksp != NULL) { 935c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_delete(xuio_ksp); 936c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp = NULL; 937c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 938c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 939c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 940c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 941c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_wbuf_copied() 942c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 943c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_copied); 944c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 945c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 946c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 947c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_wbuf_nocopy() 948c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 949c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_nocopy); 950c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 951c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 952fa9e4066Sahrens #ifdef _KERNEL 953fa9e4066Sahrens int 954feb08c6bSbillm dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size) 955feb08c6bSbillm { 956feb08c6bSbillm dmu_buf_t **dbp; 957feb08c6bSbillm int numbufs, i, err; 958c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_t *xuio = NULL; 959feb08c6bSbillm 960feb08c6bSbillm /* 961feb08c6bSbillm * NB: we could do this block-at-a-time, but it's nice 962feb08c6bSbillm * to be reading in parallel. 963feb08c6bSbillm */ 964feb08c6bSbillm err = dmu_buf_hold_array(os, object, uio->uio_loffset, size, TRUE, FTAG, 965feb08c6bSbillm &numbufs, &dbp); 966feb08c6bSbillm if (err) 967feb08c6bSbillm return (err); 968feb08c6bSbillm 969c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (uio->uio_extflg == UIO_XUIO) 970c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio = (xuio_t *)uio; 971c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 972feb08c6bSbillm for (i = 0; i < numbufs; i++) { 973feb08c6bSbillm int tocpy; 974feb08c6bSbillm int bufoff; 975feb08c6bSbillm dmu_buf_t *db = dbp[i]; 976feb08c6bSbillm 977feb08c6bSbillm ASSERT(size > 0); 978feb08c6bSbillm 979feb08c6bSbillm bufoff = uio->uio_loffset - db->db_offset; 980feb08c6bSbillm tocpy = (int)MIN(db->db_size - bufoff, size); 981feb08c6bSbillm 982c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio) { 983c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db; 984c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *dbuf_abuf = dbi->db_buf; 985c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *abuf = dbuf_loan_arcbuf(dbi); 986c242f9a0Schunli zhang - Sun Microsystems - Irvine United States err = dmu_xuio_add(xuio, abuf, bufoff, tocpy); 987c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (!err) { 988c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_resid -= tocpy; 989c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_loffset += tocpy; 990c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 991c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 992c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (abuf == dbuf_abuf) 993c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_rbuf_nocopy); 994c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 995c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_rbuf_copied); 996c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else { 997c242f9a0Schunli zhang - Sun Microsystems - Irvine United States err = uiomove((char *)db->db_data + bufoff, tocpy, 998c242f9a0Schunli zhang - Sun Microsystems - Irvine United States UIO_READ, uio); 999c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1000feb08c6bSbillm if (err) 1001feb08c6bSbillm break; 1002feb08c6bSbillm 1003feb08c6bSbillm size -= tocpy; 1004feb08c6bSbillm } 1005feb08c6bSbillm dmu_buf_rele_array(dbp, numbufs, FTAG); 1006feb08c6bSbillm 1007feb08c6bSbillm return (err); 1008feb08c6bSbillm } 1009feb08c6bSbillm 101094d1a210STim Haley static int 101194d1a210STim Haley dmu_write_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size, dmu_tx_t *tx) 1012fa9e4066Sahrens { 1013fa9e4066Sahrens dmu_buf_t **dbp; 101494d1a210STim Haley int numbufs; 1015fa9e4066Sahrens int err = 0; 101694d1a210STim Haley int i; 1017fa9e4066Sahrens 101894d1a210STim Haley err = dmu_buf_hold_array_by_dnode(dn, uio->uio_loffset, size, 101994d1a210STim Haley FALSE, FTAG, &numbufs, &dbp, DMU_READ_PREFETCH); 1020ea8dc4b6Seschrock if (err) 1021ea8dc4b6Seschrock return (err); 1022fa9e4066Sahrens 1023fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 1024fa9e4066Sahrens int tocpy; 1025fa9e4066Sahrens int bufoff; 1026fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 1027fa9e4066Sahrens 1028fa9e4066Sahrens ASSERT(size > 0); 1029fa9e4066Sahrens 1030feb08c6bSbillm bufoff = uio->uio_loffset - db->db_offset; 1031fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 1032fa9e4066Sahrens 1033fa9e4066Sahrens ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 1034fa9e4066Sahrens 1035fa9e4066Sahrens if (tocpy == db->db_size) 1036fa9e4066Sahrens dmu_buf_will_fill(db, tx); 1037fa9e4066Sahrens else 1038fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 1039fa9e4066Sahrens 1040fa9e4066Sahrens /* 1041fa9e4066Sahrens * XXX uiomove could block forever (eg. nfs-backed 1042fa9e4066Sahrens * pages). There needs to be a uiolockdown() function 1043fa9e4066Sahrens * to lock the pages in memory, so that uiomove won't 1044fa9e4066Sahrens * block. 1045fa9e4066Sahrens */ 1046fa9e4066Sahrens err = uiomove((char *)db->db_data + bufoff, tocpy, 1047fa9e4066Sahrens UIO_WRITE, uio); 1048fa9e4066Sahrens 1049fa9e4066Sahrens if (tocpy == db->db_size) 1050fa9e4066Sahrens dmu_buf_fill_done(db, tx); 1051fa9e4066Sahrens 1052fa9e4066Sahrens if (err) 1053fa9e4066Sahrens break; 1054fa9e4066Sahrens 1055fa9e4066Sahrens size -= tocpy; 1056fa9e4066Sahrens } 105794d1a210STim Haley 1058ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 1059fa9e4066Sahrens return (err); 1060fa9e4066Sahrens } 106144eda4d7Smaybee 106294d1a210STim Haley int 106394d1a210STim Haley dmu_write_uio_dbuf(dmu_buf_t *zdb, uio_t *uio, uint64_t size, 106494d1a210STim Haley dmu_tx_t *tx) 106594d1a210STim Haley { 1066*744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)zdb; 1067*744947dcSTom Erickson dnode_t *dn; 1068*744947dcSTom Erickson int err; 1069*744947dcSTom Erickson 107094d1a210STim Haley if (size == 0) 107194d1a210STim Haley return (0); 107294d1a210STim Haley 1073*744947dcSTom Erickson DB_DNODE_ENTER(db); 1074*744947dcSTom Erickson dn = DB_DNODE(db); 1075*744947dcSTom Erickson err = dmu_write_uio_dnode(dn, uio, size, tx); 1076*744947dcSTom Erickson DB_DNODE_EXIT(db); 1077*744947dcSTom Erickson 1078*744947dcSTom Erickson return (err); 107994d1a210STim Haley } 108094d1a210STim Haley 108194d1a210STim Haley int 108294d1a210STim Haley dmu_write_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size, 108394d1a210STim Haley dmu_tx_t *tx) 108494d1a210STim Haley { 108594d1a210STim Haley dnode_t *dn; 108694d1a210STim Haley int err; 108794d1a210STim Haley 108894d1a210STim Haley if (size == 0) 108994d1a210STim Haley return (0); 109094d1a210STim Haley 109194d1a210STim Haley err = dnode_hold(os, object, FTAG, &dn); 109294d1a210STim Haley if (err) 109394d1a210STim Haley return (err); 109494d1a210STim Haley 109594d1a210STim Haley err = dmu_write_uio_dnode(dn, uio, size, tx); 109694d1a210STim Haley 109794d1a210STim Haley dnode_rele(dn, FTAG); 109894d1a210STim Haley 109994d1a210STim Haley return (err); 110094d1a210STim Haley } 110194d1a210STim Haley 110244eda4d7Smaybee int 110344eda4d7Smaybee dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 110444eda4d7Smaybee page_t *pp, dmu_tx_t *tx) 110544eda4d7Smaybee { 110644eda4d7Smaybee dmu_buf_t **dbp; 110744eda4d7Smaybee int numbufs, i; 110844eda4d7Smaybee int err; 110944eda4d7Smaybee 111044eda4d7Smaybee if (size == 0) 111144eda4d7Smaybee return (0); 111244eda4d7Smaybee 111344eda4d7Smaybee err = dmu_buf_hold_array(os, object, offset, size, 111444eda4d7Smaybee FALSE, FTAG, &numbufs, &dbp); 111544eda4d7Smaybee if (err) 111644eda4d7Smaybee return (err); 111744eda4d7Smaybee 111844eda4d7Smaybee for (i = 0; i < numbufs; i++) { 111944eda4d7Smaybee int tocpy, copied, thiscpy; 112044eda4d7Smaybee int bufoff; 112144eda4d7Smaybee dmu_buf_t *db = dbp[i]; 112244eda4d7Smaybee caddr_t va; 112344eda4d7Smaybee 112444eda4d7Smaybee ASSERT(size > 0); 112544eda4d7Smaybee ASSERT3U(db->db_size, >=, PAGESIZE); 112644eda4d7Smaybee 112744eda4d7Smaybee bufoff = offset - db->db_offset; 112844eda4d7Smaybee tocpy = (int)MIN(db->db_size - bufoff, size); 112944eda4d7Smaybee 113044eda4d7Smaybee ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 113144eda4d7Smaybee 113244eda4d7Smaybee if (tocpy == db->db_size) 113344eda4d7Smaybee dmu_buf_will_fill(db, tx); 113444eda4d7Smaybee else 113544eda4d7Smaybee dmu_buf_will_dirty(db, tx); 113644eda4d7Smaybee 113744eda4d7Smaybee for (copied = 0; copied < tocpy; copied += PAGESIZE) { 113844eda4d7Smaybee ASSERT3U(pp->p_offset, ==, db->db_offset + bufoff); 113944eda4d7Smaybee thiscpy = MIN(PAGESIZE, tocpy - copied); 11400fab61baSJonathan W Adams va = zfs_map_page(pp, S_READ); 114144eda4d7Smaybee bcopy(va, (char *)db->db_data + bufoff, thiscpy); 11420fab61baSJonathan W Adams zfs_unmap_page(pp, va); 114344eda4d7Smaybee pp = pp->p_next; 114444eda4d7Smaybee bufoff += PAGESIZE; 114544eda4d7Smaybee } 114644eda4d7Smaybee 114744eda4d7Smaybee if (tocpy == db->db_size) 114844eda4d7Smaybee dmu_buf_fill_done(db, tx); 114944eda4d7Smaybee 115044eda4d7Smaybee offset += tocpy; 115144eda4d7Smaybee size -= tocpy; 115244eda4d7Smaybee } 115344eda4d7Smaybee dmu_buf_rele_array(dbp, numbufs, FTAG); 115444eda4d7Smaybee return (err); 115544eda4d7Smaybee } 1156fa9e4066Sahrens #endif 1157fa9e4066Sahrens 11582fdbea25SAleksandr Guzovskiy /* 11592fdbea25SAleksandr Guzovskiy * Allocate a loaned anonymous arc buffer. 11602fdbea25SAleksandr Guzovskiy */ 11612fdbea25SAleksandr Guzovskiy arc_buf_t * 11622fdbea25SAleksandr Guzovskiy dmu_request_arcbuf(dmu_buf_t *handle, int size) 11632fdbea25SAleksandr Guzovskiy { 1164*744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)handle; 1165*744947dcSTom Erickson spa_t *spa; 11662fdbea25SAleksandr Guzovskiy 1167*744947dcSTom Erickson DB_GET_SPA(&spa, db); 1168*744947dcSTom Erickson return (arc_loan_buf(spa, size)); 11692fdbea25SAleksandr Guzovskiy } 11702fdbea25SAleksandr Guzovskiy 11712fdbea25SAleksandr Guzovskiy /* 11722fdbea25SAleksandr Guzovskiy * Free a loaned arc buffer. 11732fdbea25SAleksandr Guzovskiy */ 11742fdbea25SAleksandr Guzovskiy void 11752fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(arc_buf_t *buf) 11762fdbea25SAleksandr Guzovskiy { 11772fdbea25SAleksandr Guzovskiy arc_return_buf(buf, FTAG); 11782fdbea25SAleksandr Guzovskiy VERIFY(arc_buf_remove_ref(buf, FTAG) == 1); 11792fdbea25SAleksandr Guzovskiy } 11802fdbea25SAleksandr Guzovskiy 11812fdbea25SAleksandr Guzovskiy /* 11822fdbea25SAleksandr Guzovskiy * When possible directly assign passed loaned arc buffer to a dbuf. 11832fdbea25SAleksandr Guzovskiy * If this is not possible copy the contents of passed arc buf via 11842fdbea25SAleksandr Guzovskiy * dmu_write(). 11852fdbea25SAleksandr Guzovskiy */ 11862fdbea25SAleksandr Guzovskiy void 11872fdbea25SAleksandr Guzovskiy dmu_assign_arcbuf(dmu_buf_t *handle, uint64_t offset, arc_buf_t *buf, 11882fdbea25SAleksandr Guzovskiy dmu_tx_t *tx) 11892fdbea25SAleksandr Guzovskiy { 1190*744947dcSTom Erickson dmu_buf_impl_t *dbuf = (dmu_buf_impl_t *)handle; 1191*744947dcSTom Erickson dnode_t *dn; 11922fdbea25SAleksandr Guzovskiy dmu_buf_impl_t *db; 11932fdbea25SAleksandr Guzovskiy uint32_t blksz = (uint32_t)arc_buf_size(buf); 11942fdbea25SAleksandr Guzovskiy uint64_t blkid; 11952fdbea25SAleksandr Guzovskiy 1196*744947dcSTom Erickson DB_DNODE_ENTER(dbuf); 1197*744947dcSTom Erickson dn = DB_DNODE(dbuf); 11982fdbea25SAleksandr Guzovskiy rw_enter(&dn->dn_struct_rwlock, RW_READER); 11992fdbea25SAleksandr Guzovskiy blkid = dbuf_whichblock(dn, offset); 12002fdbea25SAleksandr Guzovskiy VERIFY((db = dbuf_hold(dn, blkid, FTAG)) != NULL); 12012fdbea25SAleksandr Guzovskiy rw_exit(&dn->dn_struct_rwlock); 1202*744947dcSTom Erickson DB_DNODE_EXIT(dbuf); 12032fdbea25SAleksandr Guzovskiy 12042fdbea25SAleksandr Guzovskiy if (offset == db->db.db_offset && blksz == db->db.db_size) { 12052fdbea25SAleksandr Guzovskiy dbuf_assign_arcbuf(db, buf, tx); 12062fdbea25SAleksandr Guzovskiy dbuf_rele(db, FTAG); 12072fdbea25SAleksandr Guzovskiy } else { 1208*744947dcSTom Erickson objset_t *os; 1209*744947dcSTom Erickson uint64_t object; 1210*744947dcSTom Erickson 1211*744947dcSTom Erickson DB_DNODE_ENTER(dbuf); 1212*744947dcSTom Erickson dn = DB_DNODE(dbuf); 1213*744947dcSTom Erickson os = dn->dn_objset; 1214*744947dcSTom Erickson object = dn->dn_object; 1215*744947dcSTom Erickson DB_DNODE_EXIT(dbuf); 1216*744947dcSTom Erickson 12172fdbea25SAleksandr Guzovskiy dbuf_rele(db, FTAG); 1218*744947dcSTom Erickson dmu_write(os, object, offset, blksz, buf->b_data, tx); 12192fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(buf); 1220c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_copied); 12212fdbea25SAleksandr Guzovskiy } 12222fdbea25SAleksandr Guzovskiy } 12232fdbea25SAleksandr Guzovskiy 1224c5c6ffa0Smaybee typedef struct { 1225b24ab676SJeff Bonwick dbuf_dirty_record_t *dsa_dr; 1226b24ab676SJeff Bonwick dmu_sync_cb_t *dsa_done; 1227b24ab676SJeff Bonwick zgd_t *dsa_zgd; 1228b24ab676SJeff Bonwick dmu_tx_t *dsa_tx; 1229c717a561Smaybee } dmu_sync_arg_t; 1230c5c6ffa0Smaybee 1231e14bb325SJeff Bonwick /* ARGSUSED */ 1232e14bb325SJeff Bonwick static void 1233e14bb325SJeff Bonwick dmu_sync_ready(zio_t *zio, arc_buf_t *buf, void *varg) 1234e14bb325SJeff Bonwick { 1235b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = varg; 1236b24ab676SJeff Bonwick dmu_buf_t *db = dsa->dsa_zgd->zgd_db; 1237e14bb325SJeff Bonwick blkptr_t *bp = zio->io_bp; 1238975c32a0SNeil Perrin 1239b24ab676SJeff Bonwick if (zio->io_error == 0) { 1240b24ab676SJeff Bonwick if (BP_IS_HOLE(bp)) { 1241b24ab676SJeff Bonwick /* 1242b24ab676SJeff Bonwick * A block of zeros may compress to a hole, but the 1243b24ab676SJeff Bonwick * block size still needs to be known for replay. 1244b24ab676SJeff Bonwick */ 1245b24ab676SJeff Bonwick BP_SET_LSIZE(bp, db->db_size); 1246b24ab676SJeff Bonwick } else { 1247b24ab676SJeff Bonwick ASSERT(BP_GET_LEVEL(bp) == 0); 1248b24ab676SJeff Bonwick bp->blk_fill = 1; 1249b24ab676SJeff Bonwick } 1250e14bb325SJeff Bonwick } 1251e14bb325SJeff Bonwick } 1252e14bb325SJeff Bonwick 1253b24ab676SJeff Bonwick static void 1254b24ab676SJeff Bonwick dmu_sync_late_arrival_ready(zio_t *zio) 1255b24ab676SJeff Bonwick { 1256b24ab676SJeff Bonwick dmu_sync_ready(zio, NULL, zio->io_private); 1257b24ab676SJeff Bonwick } 1258b24ab676SJeff Bonwick 1259c5c6ffa0Smaybee /* ARGSUSED */ 1260c5c6ffa0Smaybee static void 1261c5c6ffa0Smaybee dmu_sync_done(zio_t *zio, arc_buf_t *buf, void *varg) 1262c5c6ffa0Smaybee { 1263b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = varg; 1264b24ab676SJeff Bonwick dbuf_dirty_record_t *dr = dsa->dsa_dr; 1265c717a561Smaybee dmu_buf_impl_t *db = dr->dr_dbuf; 1266c5c6ffa0Smaybee 1267b50a0fe0SNeil Perrin mutex_enter(&db->db_mtx); 1268b50a0fe0SNeil Perrin ASSERT(dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC); 1269b24ab676SJeff Bonwick if (zio->io_error == 0) { 1270b24ab676SJeff Bonwick dr->dt.dl.dr_overridden_by = *zio->io_bp; 1271b24ab676SJeff Bonwick dr->dt.dl.dr_override_state = DR_OVERRIDDEN; 1272b24ab676SJeff Bonwick dr->dt.dl.dr_copies = zio->io_prop.zp_copies; 1273b24ab676SJeff Bonwick if (BP_IS_HOLE(&dr->dt.dl.dr_overridden_by)) 1274b24ab676SJeff Bonwick BP_ZERO(&dr->dt.dl.dr_overridden_by); 1275b24ab676SJeff Bonwick } else { 1276b24ab676SJeff Bonwick dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN; 1277b24ab676SJeff Bonwick } 1278c5c6ffa0Smaybee cv_broadcast(&db->db_changed); 1279b50a0fe0SNeil Perrin mutex_exit(&db->db_mtx); 1280b50a0fe0SNeil Perrin 1281b24ab676SJeff Bonwick dsa->dsa_done(dsa->dsa_zgd, zio->io_error); 1282b24ab676SJeff Bonwick 1283b24ab676SJeff Bonwick kmem_free(dsa, sizeof (*dsa)); 1284b24ab676SJeff Bonwick } 1285b24ab676SJeff Bonwick 1286b24ab676SJeff Bonwick static void 1287b24ab676SJeff Bonwick dmu_sync_late_arrival_done(zio_t *zio) 1288b24ab676SJeff Bonwick { 1289b24ab676SJeff Bonwick blkptr_t *bp = zio->io_bp; 1290b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = zio->io_private; 1291b24ab676SJeff Bonwick 1292b24ab676SJeff Bonwick if (zio->io_error == 0 && !BP_IS_HOLE(bp)) { 1293b24ab676SJeff Bonwick ASSERT(zio->io_bp->blk_birth == zio->io_txg); 1294b24ab676SJeff Bonwick ASSERT(zio->io_txg > spa_syncing_txg(zio->io_spa)); 1295b24ab676SJeff Bonwick zio_free(zio->io_spa, zio->io_txg, zio->io_bp); 1296b24ab676SJeff Bonwick } 1297b24ab676SJeff Bonwick 1298b24ab676SJeff Bonwick dmu_tx_commit(dsa->dsa_tx); 1299b24ab676SJeff Bonwick 1300b24ab676SJeff Bonwick dsa->dsa_done(dsa->dsa_zgd, zio->io_error); 1301b24ab676SJeff Bonwick 1302b24ab676SJeff Bonwick kmem_free(dsa, sizeof (*dsa)); 1303b24ab676SJeff Bonwick } 1304b24ab676SJeff Bonwick 1305b24ab676SJeff Bonwick static int 1306b24ab676SJeff Bonwick dmu_sync_late_arrival(zio_t *pio, objset_t *os, dmu_sync_cb_t *done, zgd_t *zgd, 1307b24ab676SJeff Bonwick zio_prop_t *zp, zbookmark_t *zb) 1308b24ab676SJeff Bonwick { 1309b24ab676SJeff Bonwick dmu_sync_arg_t *dsa; 1310b24ab676SJeff Bonwick dmu_tx_t *tx; 1311b24ab676SJeff Bonwick 1312b24ab676SJeff Bonwick tx = dmu_tx_create(os); 1313b24ab676SJeff Bonwick dmu_tx_hold_space(tx, zgd->zgd_db->db_size); 13146e1f5caaSNeil Perrin if (dmu_tx_assign(tx, TXG_WAIT) != 0) { 1315b24ab676SJeff Bonwick dmu_tx_abort(tx); 1316b24ab676SJeff Bonwick return (EIO); /* Make zl_get_data do txg_waited_synced() */ 1317b24ab676SJeff Bonwick } 1318b24ab676SJeff Bonwick 1319b24ab676SJeff Bonwick dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); 1320b24ab676SJeff Bonwick dsa->dsa_dr = NULL; 1321b24ab676SJeff Bonwick dsa->dsa_done = done; 1322b24ab676SJeff Bonwick dsa->dsa_zgd = zgd; 1323b24ab676SJeff Bonwick dsa->dsa_tx = tx; 1324c717a561Smaybee 1325b24ab676SJeff Bonwick zio_nowait(zio_write(pio, os->os_spa, dmu_tx_get_txg(tx), zgd->zgd_bp, 1326b24ab676SJeff Bonwick zgd->zgd_db->db_data, zgd->zgd_db->db_size, zp, 1327b24ab676SJeff Bonwick dmu_sync_late_arrival_ready, dmu_sync_late_arrival_done, dsa, 1328b24ab676SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, zb)); 1329b24ab676SJeff Bonwick 1330b24ab676SJeff Bonwick return (0); 1331c5c6ffa0Smaybee } 1332c5c6ffa0Smaybee 1333fa9e4066Sahrens /* 1334c5c6ffa0Smaybee * Intent log support: sync the block associated with db to disk. 1335c5c6ffa0Smaybee * N.B. and XXX: the caller is responsible for making sure that the 1336c5c6ffa0Smaybee * data isn't changing while dmu_sync() is writing it. 1337fa9e4066Sahrens * 1338fa9e4066Sahrens * Return values: 1339fa9e4066Sahrens * 1340c5c6ffa0Smaybee * EEXIST: this txg has already been synced, so there's nothing to to. 1341fa9e4066Sahrens * The caller should not log the write. 1342fa9e4066Sahrens * 1343fa9e4066Sahrens * ENOENT: the block was dbuf_free_range()'d, so there's nothing to do. 1344fa9e4066Sahrens * The caller should not log the write. 1345fa9e4066Sahrens * 1346c5c6ffa0Smaybee * EALREADY: this block is already in the process of being synced. 1347c5c6ffa0Smaybee * The caller should track its progress (somehow). 1348fa9e4066Sahrens * 1349b24ab676SJeff Bonwick * EIO: could not do the I/O. 1350b24ab676SJeff Bonwick * The caller should do a txg_wait_synced(). 1351fa9e4066Sahrens * 1352b24ab676SJeff Bonwick * 0: the I/O has been initiated. 1353b24ab676SJeff Bonwick * The caller should log this blkptr in the done callback. 1354b24ab676SJeff Bonwick * It is possible that the I/O will fail, in which case 1355b24ab676SJeff Bonwick * the error will be reported to the done callback and 1356b24ab676SJeff Bonwick * propagated to pio from zio_done(). 1357fa9e4066Sahrens */ 1358fa9e4066Sahrens int 1359b24ab676SJeff Bonwick dmu_sync(zio_t *pio, uint64_t txg, dmu_sync_cb_t *done, zgd_t *zgd) 1360fa9e4066Sahrens { 1361b24ab676SJeff Bonwick blkptr_t *bp = zgd->zgd_bp; 1362b24ab676SJeff Bonwick dmu_buf_impl_t *db = (dmu_buf_impl_t *)zgd->zgd_db; 1363503ad85cSMatthew Ahrens objset_t *os = db->db_objset; 1364b24ab676SJeff Bonwick dsl_dataset_t *ds = os->os_dsl_dataset; 1365c717a561Smaybee dbuf_dirty_record_t *dr; 1366b24ab676SJeff Bonwick dmu_sync_arg_t *dsa; 1367ea8dc4b6Seschrock zbookmark_t zb; 1368b24ab676SJeff Bonwick zio_prop_t zp; 1369*744947dcSTom Erickson dnode_t *dn; 1370fa9e4066Sahrens 1371b24ab676SJeff Bonwick ASSERT(pio != NULL); 1372fa9e4066Sahrens ASSERT(BP_IS_HOLE(bp)); 1373fa9e4066Sahrens ASSERT(txg != 0); 1374fa9e4066Sahrens 1375b24ab676SJeff Bonwick SET_BOOKMARK(&zb, ds->ds_object, 1376b24ab676SJeff Bonwick db->db.db_object, db->db_level, db->db_blkid); 1377b24ab676SJeff Bonwick 1378*744947dcSTom Erickson DB_DNODE_ENTER(db); 1379*744947dcSTom Erickson dn = DB_DNODE(db); 1380*744947dcSTom Erickson dmu_write_policy(os, dn, db->db_level, WP_DMU_SYNC, &zp); 1381*744947dcSTom Erickson DB_DNODE_EXIT(db); 1382fa9e4066Sahrens 1383ea8dc4b6Seschrock /* 1384b24ab676SJeff Bonwick * If we're frozen (running ziltest), we always need to generate a bp. 1385ea8dc4b6Seschrock */ 1386b24ab676SJeff Bonwick if (txg > spa_freeze_txg(os->os_spa)) 1387b24ab676SJeff Bonwick return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); 1388ea8dc4b6Seschrock 1389fa9e4066Sahrens /* 1390b24ab676SJeff Bonwick * Grabbing db_mtx now provides a barrier between dbuf_sync_leaf() 1391b24ab676SJeff Bonwick * and us. If we determine that this txg is not yet syncing, 1392b24ab676SJeff Bonwick * but it begins to sync a moment later, that's OK because the 1393b24ab676SJeff Bonwick * sync thread will block in dbuf_sync_leaf() until we drop db_mtx. 1394fa9e4066Sahrens */ 1395b24ab676SJeff Bonwick mutex_enter(&db->db_mtx); 1396b24ab676SJeff Bonwick 1397b24ab676SJeff Bonwick if (txg <= spa_last_synced_txg(os->os_spa)) { 1398fa9e4066Sahrens /* 1399b24ab676SJeff Bonwick * This txg has already synced. There's nothing to do. 1400fa9e4066Sahrens */ 1401b24ab676SJeff Bonwick mutex_exit(&db->db_mtx); 1402c5c6ffa0Smaybee return (EEXIST); 1403fa9e4066Sahrens } 1404fa9e4066Sahrens 1405b24ab676SJeff Bonwick if (txg <= spa_syncing_txg(os->os_spa)) { 1406b24ab676SJeff Bonwick /* 1407b24ab676SJeff Bonwick * This txg is currently syncing, so we can't mess with 1408b24ab676SJeff Bonwick * the dirty record anymore; just write a new log block. 1409b24ab676SJeff Bonwick */ 1410b24ab676SJeff Bonwick mutex_exit(&db->db_mtx); 1411b24ab676SJeff Bonwick return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); 1412fa9e4066Sahrens } 1413fa9e4066Sahrens 1414c717a561Smaybee dr = db->db_last_dirty; 1415b24ab676SJeff Bonwick while (dr && dr->dr_txg != txg) 1416c717a561Smaybee dr = dr->dr_next; 1417b24ab676SJeff Bonwick 1418b24ab676SJeff Bonwick if (dr == NULL) { 1419c5c6ffa0Smaybee /* 1420b24ab676SJeff Bonwick * There's no dr for this dbuf, so it must have been freed. 1421c5c6ffa0Smaybee * There's no need to log writes to freed blocks, so we're done. 1422c5c6ffa0Smaybee */ 1423c5c6ffa0Smaybee mutex_exit(&db->db_mtx); 1424c5c6ffa0Smaybee return (ENOENT); 1425c5c6ffa0Smaybee } 1426c5c6ffa0Smaybee 1427c717a561Smaybee ASSERT(dr->dr_txg == txg); 1428b24ab676SJeff Bonwick if (dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC || 1429b24ab676SJeff Bonwick dr->dt.dl.dr_override_state == DR_OVERRIDDEN) { 1430c717a561Smaybee /* 1431b24ab676SJeff Bonwick * We have already issued a sync write for this buffer, 1432b24ab676SJeff Bonwick * or this buffer has already been synced. It could not 1433c717a561Smaybee * have been dirtied since, or we would have cleared the state. 1434c717a561Smaybee */ 1435c717a561Smaybee mutex_exit(&db->db_mtx); 1436b24ab676SJeff Bonwick return (EALREADY); 1437c717a561Smaybee } 1438c717a561Smaybee 1439b24ab676SJeff Bonwick ASSERT(dr->dt.dl.dr_override_state == DR_NOT_OVERRIDDEN); 1440c717a561Smaybee dr->dt.dl.dr_override_state = DR_IN_DMU_SYNC; 1441fa9e4066Sahrens mutex_exit(&db->db_mtx); 1442e14bb325SJeff Bonwick 1443b24ab676SJeff Bonwick dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); 1444b24ab676SJeff Bonwick dsa->dsa_dr = dr; 1445b24ab676SJeff Bonwick dsa->dsa_done = done; 1446b24ab676SJeff Bonwick dsa->dsa_zgd = zgd; 1447b24ab676SJeff Bonwick dsa->dsa_tx = NULL; 1448e14bb325SJeff Bonwick 1449b24ab676SJeff Bonwick zio_nowait(arc_write(pio, os->os_spa, txg, 1450b24ab676SJeff Bonwick bp, dr->dt.dl.dr_data, DBUF_IS_L2CACHEABLE(db), &zp, 1451b24ab676SJeff Bonwick dmu_sync_ready, dmu_sync_done, dsa, 1452b24ab676SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, &zb)); 1453e14bb325SJeff Bonwick 1454b24ab676SJeff Bonwick return (0); 1455fa9e4066Sahrens } 1456fa9e4066Sahrens 1457fa9e4066Sahrens int 1458fa9e4066Sahrens dmu_object_set_blocksize(objset_t *os, uint64_t object, uint64_t size, int ibs, 1459fa9e4066Sahrens dmu_tx_t *tx) 1460fa9e4066Sahrens { 1461ea8dc4b6Seschrock dnode_t *dn; 1462ea8dc4b6Seschrock int err; 1463ea8dc4b6Seschrock 1464503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1465ea8dc4b6Seschrock if (err) 1466ea8dc4b6Seschrock return (err); 1467ea8dc4b6Seschrock err = dnode_set_blksz(dn, size, ibs, tx); 1468fa9e4066Sahrens dnode_rele(dn, FTAG); 1469fa9e4066Sahrens return (err); 1470fa9e4066Sahrens } 1471fa9e4066Sahrens 1472fa9e4066Sahrens void 1473fa9e4066Sahrens dmu_object_set_checksum(objset_t *os, uint64_t object, uint8_t checksum, 1474fa9e4066Sahrens dmu_tx_t *tx) 1475fa9e4066Sahrens { 1476ea8dc4b6Seschrock dnode_t *dn; 1477ea8dc4b6Seschrock 1478ea8dc4b6Seschrock /* XXX assumes dnode_hold will not get an i/o error */ 1479503ad85cSMatthew Ahrens (void) dnode_hold(os, object, FTAG, &dn); 1480fa9e4066Sahrens ASSERT(checksum < ZIO_CHECKSUM_FUNCTIONS); 1481fa9e4066Sahrens dn->dn_checksum = checksum; 1482fa9e4066Sahrens dnode_setdirty(dn, tx); 1483fa9e4066Sahrens dnode_rele(dn, FTAG); 1484fa9e4066Sahrens } 1485fa9e4066Sahrens 1486fa9e4066Sahrens void 1487fa9e4066Sahrens dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress, 1488fa9e4066Sahrens dmu_tx_t *tx) 1489fa9e4066Sahrens { 1490ea8dc4b6Seschrock dnode_t *dn; 1491ea8dc4b6Seschrock 1492ea8dc4b6Seschrock /* XXX assumes dnode_hold will not get an i/o error */ 1493503ad85cSMatthew Ahrens (void) dnode_hold(os, object, FTAG, &dn); 1494fa9e4066Sahrens ASSERT(compress < ZIO_COMPRESS_FUNCTIONS); 1495fa9e4066Sahrens dn->dn_compress = compress; 1496fa9e4066Sahrens dnode_setdirty(dn, tx); 1497fa9e4066Sahrens dnode_rele(dn, FTAG); 1498fa9e4066Sahrens } 1499fa9e4066Sahrens 1500b24ab676SJeff Bonwick int zfs_mdcomp_disable = 0; 1501b24ab676SJeff Bonwick 1502b24ab676SJeff Bonwick void 1503b24ab676SJeff Bonwick dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp, zio_prop_t *zp) 1504b24ab676SJeff Bonwick { 1505b24ab676SJeff Bonwick dmu_object_type_t type = dn ? dn->dn_type : DMU_OT_OBJSET; 15061d8ccc7bSMark Shellenbaum boolean_t ismd = (level > 0 || dmu_ot[type].ot_metadata || 15071d8ccc7bSMark Shellenbaum (wp & WP_SPILL)); 1508b24ab676SJeff Bonwick enum zio_checksum checksum = os->os_checksum; 1509b24ab676SJeff Bonwick enum zio_compress compress = os->os_compress; 1510b24ab676SJeff Bonwick enum zio_checksum dedup_checksum = os->os_dedup_checksum; 1511b24ab676SJeff Bonwick boolean_t dedup; 1512b24ab676SJeff Bonwick boolean_t dedup_verify = os->os_dedup_verify; 1513b24ab676SJeff Bonwick int copies = os->os_copies; 1514b24ab676SJeff Bonwick 1515b24ab676SJeff Bonwick /* 1516b24ab676SJeff Bonwick * Determine checksum setting. 1517b24ab676SJeff Bonwick */ 1518b24ab676SJeff Bonwick if (ismd) { 1519b24ab676SJeff Bonwick /* 1520b24ab676SJeff Bonwick * Metadata always gets checksummed. If the data 1521b24ab676SJeff Bonwick * checksum is multi-bit correctable, and it's not a 1522b24ab676SJeff Bonwick * ZBT-style checksum, then it's suitable for metadata 1523b24ab676SJeff Bonwick * as well. Otherwise, the metadata checksum defaults 1524b24ab676SJeff Bonwick * to fletcher4. 1525b24ab676SJeff Bonwick */ 1526b24ab676SJeff Bonwick if (zio_checksum_table[checksum].ci_correctable < 1 || 15276e1f5caaSNeil Perrin zio_checksum_table[checksum].ci_eck) 1528b24ab676SJeff Bonwick checksum = ZIO_CHECKSUM_FLETCHER_4; 1529b24ab676SJeff Bonwick } else { 1530b24ab676SJeff Bonwick checksum = zio_checksum_select(dn->dn_checksum, checksum); 1531b24ab676SJeff Bonwick } 1532b24ab676SJeff Bonwick 1533b24ab676SJeff Bonwick /* 1534b24ab676SJeff Bonwick * Determine compression setting. 1535b24ab676SJeff Bonwick */ 1536b24ab676SJeff Bonwick if (ismd) { 1537b24ab676SJeff Bonwick /* 1538b24ab676SJeff Bonwick * XXX -- we should design a compression algorithm 1539b24ab676SJeff Bonwick * that specializes in arrays of bps. 1540b24ab676SJeff Bonwick */ 1541b24ab676SJeff Bonwick compress = zfs_mdcomp_disable ? ZIO_COMPRESS_EMPTY : 1542b24ab676SJeff Bonwick ZIO_COMPRESS_LZJB; 1543b24ab676SJeff Bonwick } else { 1544b24ab676SJeff Bonwick compress = zio_compress_select(dn->dn_compress, compress); 1545b24ab676SJeff Bonwick } 1546b24ab676SJeff Bonwick 1547b24ab676SJeff Bonwick /* 1548b24ab676SJeff Bonwick * Determine dedup setting. If we are in dmu_sync(), we won't 1549b24ab676SJeff Bonwick * actually dedup now because that's all done in syncing context; 1550b24ab676SJeff Bonwick * but we do want to use the dedup checkum. If the checksum is not 1551b24ab676SJeff Bonwick * strong enough to ensure unique signatures, force dedup_verify. 1552b24ab676SJeff Bonwick */ 1553b24ab676SJeff Bonwick dedup = (!ismd && dedup_checksum != ZIO_CHECKSUM_OFF); 1554b24ab676SJeff Bonwick if (dedup) { 1555b24ab676SJeff Bonwick checksum = dedup_checksum; 1556b24ab676SJeff Bonwick if (!zio_checksum_table[checksum].ci_dedup) 1557b24ab676SJeff Bonwick dedup_verify = 1; 1558b24ab676SJeff Bonwick } 1559b24ab676SJeff Bonwick 1560b24ab676SJeff Bonwick if (wp & WP_DMU_SYNC) 1561b24ab676SJeff Bonwick dedup = 0; 1562b24ab676SJeff Bonwick 1563b24ab676SJeff Bonwick if (wp & WP_NOFILL) { 1564b24ab676SJeff Bonwick ASSERT(!ismd && level == 0); 1565b24ab676SJeff Bonwick checksum = ZIO_CHECKSUM_OFF; 1566b24ab676SJeff Bonwick compress = ZIO_COMPRESS_OFF; 1567b24ab676SJeff Bonwick dedup = B_FALSE; 1568b24ab676SJeff Bonwick } 1569b24ab676SJeff Bonwick 1570b24ab676SJeff Bonwick zp->zp_checksum = checksum; 1571b24ab676SJeff Bonwick zp->zp_compress = compress; 15720a586ceaSMark Shellenbaum zp->zp_type = (wp & WP_SPILL) ? dn->dn_bonustype : type; 1573b24ab676SJeff Bonwick zp->zp_level = level; 1574b24ab676SJeff Bonwick zp->zp_copies = MIN(copies + ismd, spa_max_replication(os->os_spa)); 1575b24ab676SJeff Bonwick zp->zp_dedup = dedup; 1576b24ab676SJeff Bonwick zp->zp_dedup_verify = dedup && dedup_verify; 1577b24ab676SJeff Bonwick } 1578b24ab676SJeff Bonwick 1579fa9e4066Sahrens int 1580fa9e4066Sahrens dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole, uint64_t *off) 1581fa9e4066Sahrens { 1582fa9e4066Sahrens dnode_t *dn; 1583fa9e4066Sahrens int i, err; 1584fa9e4066Sahrens 1585503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1586ea8dc4b6Seschrock if (err) 1587ea8dc4b6Seschrock return (err); 1588fa9e4066Sahrens /* 1589fa9e4066Sahrens * Sync any current changes before 1590fa9e4066Sahrens * we go trundling through the block pointers. 1591fa9e4066Sahrens */ 1592fa9e4066Sahrens for (i = 0; i < TXG_SIZE; i++) { 1593c543ec06Sahrens if (list_link_active(&dn->dn_dirty_link[i])) 1594fa9e4066Sahrens break; 1595fa9e4066Sahrens } 1596fa9e4066Sahrens if (i != TXG_SIZE) { 1597fa9e4066Sahrens dnode_rele(dn, FTAG); 1598fa9e4066Sahrens txg_wait_synced(dmu_objset_pool(os), 0); 1599503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1600ea8dc4b6Seschrock if (err) 1601ea8dc4b6Seschrock return (err); 1602fa9e4066Sahrens } 1603fa9e4066Sahrens 1604cdb0ab79Smaybee err = dnode_next_offset(dn, (hole ? DNODE_FIND_HOLE : 0), off, 1, 1, 0); 1605fa9e4066Sahrens dnode_rele(dn, FTAG); 1606fa9e4066Sahrens 1607fa9e4066Sahrens return (err); 1608fa9e4066Sahrens } 1609fa9e4066Sahrens 1610fa9e4066Sahrens void 1611fa9e4066Sahrens dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi) 1612fa9e4066Sahrens { 1613b24ab676SJeff Bonwick dnode_phys_t *dnp; 1614b24ab676SJeff Bonwick 1615fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 1616fa9e4066Sahrens mutex_enter(&dn->dn_mtx); 1617fa9e4066Sahrens 1618b24ab676SJeff Bonwick dnp = dn->dn_phys; 1619b24ab676SJeff Bonwick 1620fa9e4066Sahrens doi->doi_data_block_size = dn->dn_datablksz; 1621fa9e4066Sahrens doi->doi_metadata_block_size = dn->dn_indblkshift ? 1622fa9e4066Sahrens 1ULL << dn->dn_indblkshift : 0; 1623b24ab676SJeff Bonwick doi->doi_type = dn->dn_type; 1624b24ab676SJeff Bonwick doi->doi_bonus_type = dn->dn_bonustype; 1625b24ab676SJeff Bonwick doi->doi_bonus_size = dn->dn_bonuslen; 1626fa9e4066Sahrens doi->doi_indirection = dn->dn_nlevels; 1627fa9e4066Sahrens doi->doi_checksum = dn->dn_checksum; 1628fa9e4066Sahrens doi->doi_compress = dn->dn_compress; 1629b24ab676SJeff Bonwick doi->doi_physical_blocks_512 = (DN_USED_BYTES(dnp) + 256) >> 9; 1630b24ab676SJeff Bonwick doi->doi_max_offset = (dnp->dn_maxblkid + 1) * dn->dn_datablksz; 1631b24ab676SJeff Bonwick doi->doi_fill_count = 0; 1632b24ab676SJeff Bonwick for (int i = 0; i < dnp->dn_nblkptr; i++) 1633b24ab676SJeff Bonwick doi->doi_fill_count += dnp->dn_blkptr[i].blk_fill; 1634fa9e4066Sahrens 1635fa9e4066Sahrens mutex_exit(&dn->dn_mtx); 1636fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 1637fa9e4066Sahrens } 1638fa9e4066Sahrens 1639fa9e4066Sahrens /* 1640fa9e4066Sahrens * Get information on a DMU object. 1641fa9e4066Sahrens * If doi is NULL, just indicates whether the object exists. 1642fa9e4066Sahrens */ 1643fa9e4066Sahrens int 1644fa9e4066Sahrens dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi) 1645fa9e4066Sahrens { 1646ea8dc4b6Seschrock dnode_t *dn; 1647503ad85cSMatthew Ahrens int err = dnode_hold(os, object, FTAG, &dn); 1648fa9e4066Sahrens 1649ea8dc4b6Seschrock if (err) 1650ea8dc4b6Seschrock return (err); 1651fa9e4066Sahrens 1652fa9e4066Sahrens if (doi != NULL) 1653fa9e4066Sahrens dmu_object_info_from_dnode(dn, doi); 1654fa9e4066Sahrens 1655fa9e4066Sahrens dnode_rele(dn, FTAG); 1656fa9e4066Sahrens return (0); 1657fa9e4066Sahrens } 1658fa9e4066Sahrens 1659fa9e4066Sahrens /* 1660fa9e4066Sahrens * As above, but faster; can be used when you have a held dbuf in hand. 1661fa9e4066Sahrens */ 1662fa9e4066Sahrens void 1663*744947dcSTom Erickson dmu_object_info_from_db(dmu_buf_t *db_fake, dmu_object_info_t *doi) 1664fa9e4066Sahrens { 1665*744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 1666*744947dcSTom Erickson 1667*744947dcSTom Erickson DB_DNODE_ENTER(db); 1668*744947dcSTom Erickson dmu_object_info_from_dnode(DB_DNODE(db), doi); 1669*744947dcSTom Erickson DB_DNODE_EXIT(db); 1670fa9e4066Sahrens } 1671fa9e4066Sahrens 1672fa9e4066Sahrens /* 1673fa9e4066Sahrens * Faster still when you only care about the size. 1674fa9e4066Sahrens * This is specifically optimized for zfs_getattr(). 1675fa9e4066Sahrens */ 1676fa9e4066Sahrens void 1677*744947dcSTom Erickson dmu_object_size_from_db(dmu_buf_t *db_fake, uint32_t *blksize, 1678*744947dcSTom Erickson u_longlong_t *nblk512) 1679fa9e4066Sahrens { 1680*744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 1681*744947dcSTom Erickson dnode_t *dn; 1682*744947dcSTom Erickson 1683*744947dcSTom Erickson DB_DNODE_ENTER(db); 1684*744947dcSTom Erickson dn = DB_DNODE(db); 1685fa9e4066Sahrens 1686fa9e4066Sahrens *blksize = dn->dn_datablksz; 168799653d4eSeschrock /* add 1 for dnode space */ 168899653d4eSeschrock *nblk512 = ((DN_USED_BYTES(dn->dn_phys) + SPA_MINBLOCKSIZE/2) >> 168999653d4eSeschrock SPA_MINBLOCKSHIFT) + 1; 1690*744947dcSTom Erickson DB_DNODE_EXIT(db); 1691fa9e4066Sahrens } 1692fa9e4066Sahrens 1693fa9e4066Sahrens void 1694fa9e4066Sahrens byteswap_uint64_array(void *vbuf, size_t size) 1695fa9e4066Sahrens { 1696fa9e4066Sahrens uint64_t *buf = vbuf; 1697fa9e4066Sahrens size_t count = size >> 3; 1698fa9e4066Sahrens int i; 1699fa9e4066Sahrens 1700fa9e4066Sahrens ASSERT((size & 7) == 0); 1701fa9e4066Sahrens 1702fa9e4066Sahrens for (i = 0; i < count; i++) 1703fa9e4066Sahrens buf[i] = BSWAP_64(buf[i]); 1704fa9e4066Sahrens } 1705fa9e4066Sahrens 1706fa9e4066Sahrens void 1707fa9e4066Sahrens byteswap_uint32_array(void *vbuf, size_t size) 1708fa9e4066Sahrens { 1709fa9e4066Sahrens uint32_t *buf = vbuf; 1710fa9e4066Sahrens size_t count = size >> 2; 1711fa9e4066Sahrens int i; 1712fa9e4066Sahrens 1713fa9e4066Sahrens ASSERT((size & 3) == 0); 1714fa9e4066Sahrens 1715fa9e4066Sahrens for (i = 0; i < count; i++) 1716fa9e4066Sahrens buf[i] = BSWAP_32(buf[i]); 1717fa9e4066Sahrens } 1718fa9e4066Sahrens 1719fa9e4066Sahrens void 1720fa9e4066Sahrens byteswap_uint16_array(void *vbuf, size_t size) 1721fa9e4066Sahrens { 1722fa9e4066Sahrens uint16_t *buf = vbuf; 1723fa9e4066Sahrens size_t count = size >> 1; 1724fa9e4066Sahrens int i; 1725fa9e4066Sahrens 1726fa9e4066Sahrens ASSERT((size & 1) == 0); 1727fa9e4066Sahrens 1728fa9e4066Sahrens for (i = 0; i < count; i++) 1729fa9e4066Sahrens buf[i] = BSWAP_16(buf[i]); 1730fa9e4066Sahrens } 1731fa9e4066Sahrens 1732fa9e4066Sahrens /* ARGSUSED */ 1733fa9e4066Sahrens void 1734fa9e4066Sahrens byteswap_uint8_array(void *vbuf, size_t size) 1735fa9e4066Sahrens { 1736fa9e4066Sahrens } 1737fa9e4066Sahrens 1738fa9e4066Sahrens void 1739fa9e4066Sahrens dmu_init(void) 1740fa9e4066Sahrens { 17413f9d6ad7SLin Ling zfs_dbgmsg_init(); 1742*744947dcSTom Erickson sa_cache_init(); 1743*744947dcSTom Erickson xuio_stat_init(); 1744*744947dcSTom Erickson dmu_objset_init(); 1745fa9e4066Sahrens dnode_init(); 1746*744947dcSTom Erickson dbuf_init(); 17477cbf8b43SRich Morris zfetch_init(); 1748fa9e4066Sahrens arc_init(); 1749fa94a07fSbrendan l2arc_init(); 1750fa9e4066Sahrens } 1751fa9e4066Sahrens 1752fa9e4066Sahrens void 1753fa9e4066Sahrens dmu_fini(void) 1754fa9e4066Sahrens { 1755*744947dcSTom Erickson l2arc_fini(); 1756fa9e4066Sahrens arc_fini(); 17577cbf8b43SRich Morris zfetch_fini(); 1758fa9e4066Sahrens dbuf_fini(); 1759*744947dcSTom Erickson dnode_fini(); 1760*744947dcSTom Erickson dmu_objset_fini(); 1761c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_fini(); 17620a586ceaSMark Shellenbaum sa_cache_fini(); 17633f9d6ad7SLin Ling zfs_dbgmsg_fini(); 1764fa9e4066Sahrens } 1765