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. 238df0bcf0SPaul Dagnelie * Copyright (c) 2011, 2016 by Delphix. All rights reserved. 24fa9e4066Sahrens */ 25aad02571SSaso Kiselkov /* Copyright (c) 2013 by Saso Kiselkov. All rights reserved. */ 26810e43b2SBill Pijewski /* Copyright (c) 2013, Joyent, Inc. All rights reserved. */ 27eb721827SAlek Pinchuk /* Copyright 2016 Nexenta Systems, Inc. All rights reserved. */ 28aad02571SSaso Kiselkov 29fa9e4066Sahrens #include <sys/dmu.h> 30fa9e4066Sahrens #include <sys/dmu_impl.h> 31fa9e4066Sahrens #include <sys/dmu_tx.h> 32fa9e4066Sahrens #include <sys/dbuf.h> 33fa9e4066Sahrens #include <sys/dnode.h> 34fa9e4066Sahrens #include <sys/zfs_context.h> 35fa9e4066Sahrens #include <sys/dmu_objset.h> 36fa9e4066Sahrens #include <sys/dmu_traverse.h> 37fa9e4066Sahrens #include <sys/dsl_dataset.h> 38fa9e4066Sahrens #include <sys/dsl_dir.h> 39fa9e4066Sahrens #include <sys/dsl_pool.h> 401d452cf5Sahrens #include <sys/dsl_synctask.h> 41a2eea2e1Sahrens #include <sys/dsl_prop.h> 42fa9e4066Sahrens #include <sys/dmu_zfetch.h> 43fa9e4066Sahrens #include <sys/zfs_ioctl.h> 44fa9e4066Sahrens #include <sys/zap.h> 45ea8dc4b6Seschrock #include <sys/zio_checksum.h> 4680901aeaSGeorge Wilson #include <sys/zio_compress.h> 470a586ceaSMark Shellenbaum #include <sys/sa.h> 48b8289d24SDaniil Lunev #include <sys/zfeature.h> 4944eda4d7Smaybee #ifdef _KERNEL 5044eda4d7Smaybee #include <sys/vmsystm.h> 510fab61baSJonathan W Adams #include <sys/zfs_znode.h> 5244eda4d7Smaybee #endif 53fa9e4066Sahrens 5480901aeaSGeorge Wilson /* 5580901aeaSGeorge Wilson * Enable/disable nopwrite feature. 5680901aeaSGeorge Wilson */ 5780901aeaSGeorge Wilson int zfs_nopwrite_enabled = 1; 5880901aeaSGeorge Wilson 59*ff5177eeSAlek Pinchuk /* 60*ff5177eeSAlek Pinchuk * Tunable to control percentage of dirtied blocks from frees in one TXG. 61*ff5177eeSAlek Pinchuk * After this threshold is crossed, additional dirty blocks from frees 62*ff5177eeSAlek Pinchuk * wait until the next TXG. 63*ff5177eeSAlek Pinchuk * A value of zero will disable this throttle. 64*ff5177eeSAlek Pinchuk */ 65*ff5177eeSAlek Pinchuk uint32_t zfs_per_txg_dirty_frees_percent = 30; 66*ff5177eeSAlek Pinchuk 67fa9e4066Sahrens const dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES] = { 68ad135b5dSChristopher Siden { DMU_BSWAP_UINT8, TRUE, "unallocated" }, 69ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "object directory" }, 70ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "object array" }, 71ad135b5dSChristopher Siden { DMU_BSWAP_UINT8, TRUE, "packed nvlist" }, 72ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "packed nvlist size" }, 73ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "bpobj" }, 74ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "bpobj header" }, 75ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "SPA space map header" }, 76ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "SPA space map" }, 77ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "ZIL intent log" }, 78ad135b5dSChristopher Siden { DMU_BSWAP_DNODE, TRUE, "DMU dnode" }, 79ad135b5dSChristopher Siden { DMU_BSWAP_OBJSET, TRUE, "DMU objset" }, 80ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "DSL directory" }, 81ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "DSL directory child map"}, 82ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "DSL dataset snap map" }, 83ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "DSL props" }, 84ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "DSL dataset" }, 85ad135b5dSChristopher Siden { DMU_BSWAP_ZNODE, TRUE, "ZFS znode" }, 86ad135b5dSChristopher Siden { DMU_BSWAP_OLDACL, TRUE, "ZFS V0 ACL" }, 87ad135b5dSChristopher Siden { DMU_BSWAP_UINT8, FALSE, "ZFS plain file" }, 88ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "ZFS directory" }, 89ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "ZFS master node" }, 90ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "ZFS delete queue" }, 91ad135b5dSChristopher Siden { DMU_BSWAP_UINT8, FALSE, "zvol object" }, 92ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "zvol prop" }, 93ad135b5dSChristopher Siden { DMU_BSWAP_UINT8, FALSE, "other uint8[]" }, 94ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, FALSE, "other uint64[]" }, 95ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "other ZAP" }, 96ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "persistent error log" }, 97ad135b5dSChristopher Siden { DMU_BSWAP_UINT8, TRUE, "SPA history" }, 98ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "SPA history offsets" }, 99ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "Pool properties" }, 100ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "DSL permissions" }, 101ad135b5dSChristopher Siden { DMU_BSWAP_ACL, TRUE, "ZFS ACL" }, 102ad135b5dSChristopher Siden { DMU_BSWAP_UINT8, TRUE, "ZFS SYSACL" }, 103ad135b5dSChristopher Siden { DMU_BSWAP_UINT8, TRUE, "FUID table" }, 104ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "FUID table size" }, 105ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "DSL dataset next clones"}, 106ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "scan work queue" }, 107ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "ZFS user/group used" }, 108ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "ZFS user/group quota" }, 109ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "snapshot refcount tags"}, 110ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "DDT ZAP algorithm" }, 111ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "DDT statistics" }, 112ad135b5dSChristopher Siden { DMU_BSWAP_UINT8, TRUE, "System attributes" }, 113ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "SA master node" }, 114ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "SA attr registration" }, 115ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "SA attr layouts" }, 116ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "scan translations" }, 117ad135b5dSChristopher Siden { DMU_BSWAP_UINT8, FALSE, "deduplicated block" }, 118ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "DSL deadlist map" }, 119ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "DSL deadlist map hdr" }, 120ad135b5dSChristopher Siden { DMU_BSWAP_ZAP, TRUE, "DSL dir clones" }, 121ad135b5dSChristopher Siden { DMU_BSWAP_UINT64, TRUE, "bpobj subobj" } 122ad135b5dSChristopher Siden }; 123ad135b5dSChristopher Siden 124ad135b5dSChristopher Siden const dmu_object_byteswap_info_t dmu_ot_byteswap[DMU_BSWAP_NUMFUNCS] = { 125ad135b5dSChristopher Siden { byteswap_uint8_array, "uint8" }, 126ad135b5dSChristopher Siden { byteswap_uint16_array, "uint16" }, 127ad135b5dSChristopher Siden { byteswap_uint32_array, "uint32" }, 128ad135b5dSChristopher Siden { byteswap_uint64_array, "uint64" }, 129ad135b5dSChristopher Siden { zap_byteswap, "zap" }, 130ad135b5dSChristopher Siden { dnode_buf_byteswap, "dnode" }, 131ad135b5dSChristopher Siden { dmu_objset_byteswap, "objset" }, 132ad135b5dSChristopher Siden { zfs_znode_byteswap, "znode" }, 133ad135b5dSChristopher Siden { zfs_oldacl_byteswap, "oldacl" }, 134ad135b5dSChristopher Siden { zfs_acl_byteswap, "acl" } 1353f9d6ad7SLin Ling }; 136fa9e4066Sahrens 13779d72832SMatthew Ahrens int 13879d72832SMatthew Ahrens dmu_buf_hold_noread_by_dnode(dnode_t *dn, uint64_t offset, 13979d72832SMatthew Ahrens void *tag, dmu_buf_t **dbp) 14079d72832SMatthew Ahrens { 14179d72832SMatthew Ahrens uint64_t blkid; 14279d72832SMatthew Ahrens dmu_buf_impl_t *db; 14379d72832SMatthew Ahrens 14479d72832SMatthew Ahrens blkid = dbuf_whichblock(dn, 0, offset); 14579d72832SMatthew Ahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 14679d72832SMatthew Ahrens db = dbuf_hold(dn, blkid, tag); 14779d72832SMatthew Ahrens rw_exit(&dn->dn_struct_rwlock); 14879d72832SMatthew Ahrens 14979d72832SMatthew Ahrens if (db == NULL) { 15079d72832SMatthew Ahrens *dbp = NULL; 15179d72832SMatthew Ahrens return (SET_ERROR(EIO)); 15279d72832SMatthew Ahrens } 15379d72832SMatthew Ahrens 15479d72832SMatthew Ahrens *dbp = &db->db; 15579d72832SMatthew Ahrens return (0); 15679d72832SMatthew Ahrens } 157fa9e4066Sahrens int 1585d7b4d43SMatthew Ahrens dmu_buf_hold_noread(objset_t *os, uint64_t object, uint64_t offset, 1595d7b4d43SMatthew Ahrens void *tag, dmu_buf_t **dbp) 160fa9e4066Sahrens { 161fa9e4066Sahrens dnode_t *dn; 162fa9e4066Sahrens uint64_t blkid; 163fa9e4066Sahrens dmu_buf_impl_t *db; 164ea8dc4b6Seschrock int err; 165fa9e4066Sahrens 166503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 167ea8dc4b6Seschrock if (err) 168ea8dc4b6Seschrock return (err); 169a2cdcdd2SPaul Dagnelie blkid = dbuf_whichblock(dn, 0, offset); 170fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 171ea8dc4b6Seschrock db = dbuf_hold(dn, blkid, tag); 172fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 1735d7b4d43SMatthew Ahrens dnode_rele(dn, FTAG); 1745d7b4d43SMatthew Ahrens 175ea8dc4b6Seschrock if (db == NULL) { 1765d7b4d43SMatthew Ahrens *dbp = NULL; 1775d7b4d43SMatthew Ahrens return (SET_ERROR(EIO)); 1785d7b4d43SMatthew Ahrens } 1795d7b4d43SMatthew Ahrens 1805d7b4d43SMatthew Ahrens *dbp = &db->db; 1815d7b4d43SMatthew Ahrens return (err); 1825d7b4d43SMatthew Ahrens } 1835d7b4d43SMatthew Ahrens 18479d72832SMatthew Ahrens int 18579d72832SMatthew Ahrens dmu_buf_hold_by_dnode(dnode_t *dn, uint64_t offset, 18679d72832SMatthew Ahrens void *tag, dmu_buf_t **dbp, int flags) 18779d72832SMatthew Ahrens { 18879d72832SMatthew Ahrens int err; 18979d72832SMatthew Ahrens int db_flags = DB_RF_CANFAIL; 19079d72832SMatthew Ahrens 19179d72832SMatthew Ahrens if (flags & DMU_READ_NO_PREFETCH) 19279d72832SMatthew Ahrens db_flags |= DB_RF_NOPREFETCH; 19379d72832SMatthew Ahrens 19479d72832SMatthew Ahrens err = dmu_buf_hold_noread_by_dnode(dn, offset, tag, dbp); 19579d72832SMatthew Ahrens if (err == 0) { 19679d72832SMatthew Ahrens dmu_buf_impl_t *db = (dmu_buf_impl_t *)(*dbp); 19779d72832SMatthew Ahrens err = dbuf_read(db, NULL, db_flags); 19879d72832SMatthew Ahrens if (err != 0) { 19979d72832SMatthew Ahrens dbuf_rele(db, tag); 20079d72832SMatthew Ahrens *dbp = NULL; 20179d72832SMatthew Ahrens } 20279d72832SMatthew Ahrens } 20379d72832SMatthew Ahrens 20479d72832SMatthew Ahrens return (err); 20579d72832SMatthew Ahrens } 20679d72832SMatthew Ahrens 2075d7b4d43SMatthew Ahrens int 2085d7b4d43SMatthew Ahrens dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset, 2095d7b4d43SMatthew Ahrens void *tag, dmu_buf_t **dbp, int flags) 2105d7b4d43SMatthew Ahrens { 2115d7b4d43SMatthew Ahrens int err; 2125d7b4d43SMatthew Ahrens int db_flags = DB_RF_CANFAIL; 2135d7b4d43SMatthew Ahrens 2145d7b4d43SMatthew Ahrens if (flags & DMU_READ_NO_PREFETCH) 2155d7b4d43SMatthew Ahrens db_flags |= DB_RF_NOPREFETCH; 2165d7b4d43SMatthew Ahrens 2175d7b4d43SMatthew Ahrens err = dmu_buf_hold_noread(os, object, offset, tag, dbp); 2185d7b4d43SMatthew Ahrens if (err == 0) { 2195d7b4d43SMatthew Ahrens dmu_buf_impl_t *db = (dmu_buf_impl_t *)(*dbp); 22047cb52daSJeff Bonwick err = dbuf_read(db, NULL, db_flags); 2215d7b4d43SMatthew Ahrens if (err != 0) { 222ea8dc4b6Seschrock dbuf_rele(db, tag); 2235d7b4d43SMatthew Ahrens *dbp = NULL; 224ea8dc4b6Seschrock } 225ea8dc4b6Seschrock } 226fa9e4066Sahrens 227ea8dc4b6Seschrock return (err); 228fa9e4066Sahrens } 229fa9e4066Sahrens 230fa9e4066Sahrens int 231fa9e4066Sahrens dmu_bonus_max(void) 232fa9e4066Sahrens { 233fa9e4066Sahrens return (DN_MAX_BONUSLEN); 234fa9e4066Sahrens } 235fa9e4066Sahrens 2361934e92fSmaybee int 237744947dcSTom Erickson dmu_set_bonus(dmu_buf_t *db_fake, int newsize, dmu_tx_t *tx) 2381934e92fSmaybee { 239744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 240744947dcSTom Erickson dnode_t *dn; 241744947dcSTom Erickson int error; 2421934e92fSmaybee 243744947dcSTom Erickson DB_DNODE_ENTER(db); 244744947dcSTom Erickson dn = DB_DNODE(db); 245744947dcSTom Erickson 246744947dcSTom Erickson if (dn->dn_bonus != db) { 247be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 248744947dcSTom Erickson } else if (newsize < 0 || newsize > db_fake->db_size) { 249be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 250744947dcSTom Erickson } else { 251744947dcSTom Erickson dnode_setbonuslen(dn, newsize, tx); 252744947dcSTom Erickson error = 0; 253744947dcSTom Erickson } 254744947dcSTom Erickson 255744947dcSTom Erickson DB_DNODE_EXIT(db); 256744947dcSTom Erickson return (error); 2571934e92fSmaybee } 2581934e92fSmaybee 2590a586ceaSMark Shellenbaum int 260744947dcSTom Erickson dmu_set_bonustype(dmu_buf_t *db_fake, dmu_object_type_t type, dmu_tx_t *tx) 2610a586ceaSMark Shellenbaum { 262744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 263744947dcSTom Erickson dnode_t *dn; 264744947dcSTom Erickson int error; 2650a586ceaSMark Shellenbaum 266744947dcSTom Erickson DB_DNODE_ENTER(db); 267744947dcSTom Erickson dn = DB_DNODE(db); 268744947dcSTom Erickson 269ad135b5dSChristopher Siden if (!DMU_OT_IS_VALID(type)) { 270be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 271744947dcSTom Erickson } else if (dn->dn_bonus != db) { 272be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 273744947dcSTom Erickson } else { 274744947dcSTom Erickson dnode_setbonus_type(dn, type, tx); 275744947dcSTom Erickson error = 0; 276744947dcSTom Erickson } 2770a586ceaSMark Shellenbaum 278744947dcSTom Erickson DB_DNODE_EXIT(db); 279744947dcSTom Erickson return (error); 280744947dcSTom Erickson } 2810a586ceaSMark Shellenbaum 282744947dcSTom Erickson dmu_object_type_t 283744947dcSTom Erickson dmu_get_bonustype(dmu_buf_t *db_fake) 284744947dcSTom Erickson { 285744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 286744947dcSTom Erickson dnode_t *dn; 287744947dcSTom Erickson dmu_object_type_t type; 288744947dcSTom Erickson 289744947dcSTom Erickson DB_DNODE_ENTER(db); 290744947dcSTom Erickson dn = DB_DNODE(db); 291744947dcSTom Erickson type = dn->dn_bonustype; 292744947dcSTom Erickson DB_DNODE_EXIT(db); 293744947dcSTom Erickson 294744947dcSTom Erickson return (type); 2950a586ceaSMark Shellenbaum } 2960a586ceaSMark Shellenbaum 2970a586ceaSMark Shellenbaum int 2980a586ceaSMark Shellenbaum dmu_rm_spill(objset_t *os, uint64_t object, dmu_tx_t *tx) 2990a586ceaSMark Shellenbaum { 3000a586ceaSMark Shellenbaum dnode_t *dn; 3010a586ceaSMark Shellenbaum int error; 3020a586ceaSMark Shellenbaum 3030a586ceaSMark Shellenbaum error = dnode_hold(os, object, FTAG, &dn); 3040a586ceaSMark Shellenbaum dbuf_rm_spill(dn, tx); 30506e0070dSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 30606e0070dSMark Shellenbaum dnode_rm_spill(dn, tx); 30706e0070dSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 3080a586ceaSMark Shellenbaum dnode_rele(dn, FTAG); 3090a586ceaSMark Shellenbaum return (error); 3100a586ceaSMark Shellenbaum } 3110a586ceaSMark Shellenbaum 312fa9e4066Sahrens /* 313ea8dc4b6Seschrock * returns ENOENT, EIO, or 0. 314fa9e4066Sahrens */ 315ea8dc4b6Seschrock int 316ea8dc4b6Seschrock dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **dbp) 317fa9e4066Sahrens { 318ea8dc4b6Seschrock dnode_t *dn; 319fa9e4066Sahrens dmu_buf_impl_t *db; 3201934e92fSmaybee int error; 321fa9e4066Sahrens 322503ad85cSMatthew Ahrens error = dnode_hold(os, object, FTAG, &dn); 3231934e92fSmaybee if (error) 3241934e92fSmaybee return (error); 325fa9e4066Sahrens 326ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_READER); 327ea8dc4b6Seschrock if (dn->dn_bonus == NULL) { 328fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 329ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 330ea8dc4b6Seschrock if (dn->dn_bonus == NULL) 3311934e92fSmaybee dbuf_create_bonus(dn); 332fa9e4066Sahrens } 333ea8dc4b6Seschrock db = dn->dn_bonus; 3341934e92fSmaybee 3351934e92fSmaybee /* as long as the bonus buf is held, the dnode will be held */ 336744947dcSTom Erickson if (refcount_add(&db->db_holds, tag) == 1) { 3371934e92fSmaybee VERIFY(dnode_add_ref(dn, db)); 338640c1670SJosef 'Jeff' Sipek atomic_inc_32(&dn->dn_dbufs_count); 339744947dcSTom Erickson } 340744947dcSTom Erickson 341744947dcSTom Erickson /* 342744947dcSTom Erickson * Wait to drop dn_struct_rwlock until after adding the bonus dbuf's 343744947dcSTom Erickson * hold and incrementing the dbuf count to ensure that dnode_move() sees 344744947dcSTom Erickson * a dnode hold for every dbuf. 345744947dcSTom Erickson */ 346744947dcSTom Erickson rw_exit(&dn->dn_struct_rwlock); 3471934e92fSmaybee 348fa9e4066Sahrens dnode_rele(dn, FTAG); 349ea8dc4b6Seschrock 35047cb52daSJeff Bonwick VERIFY(0 == dbuf_read(db, NULL, DB_RF_MUST_SUCCEED | DB_RF_NOPREFETCH)); 351ea8dc4b6Seschrock 352ea8dc4b6Seschrock *dbp = &db->db; 353ea8dc4b6Seschrock return (0); 354fa9e4066Sahrens } 355fa9e4066Sahrens 3560a586ceaSMark Shellenbaum /* 3570a586ceaSMark Shellenbaum * returns ENOENT, EIO, or 0. 3580a586ceaSMark Shellenbaum * 3590a586ceaSMark Shellenbaum * This interface will allocate a blank spill dbuf when a spill blk 3600a586ceaSMark Shellenbaum * doesn't already exist on the dnode. 3610a586ceaSMark Shellenbaum * 3620a586ceaSMark Shellenbaum * if you only want to find an already existing spill db, then 3630a586ceaSMark Shellenbaum * dmu_spill_hold_existing() should be used. 3640a586ceaSMark Shellenbaum */ 3650a586ceaSMark Shellenbaum int 3660a586ceaSMark Shellenbaum dmu_spill_hold_by_dnode(dnode_t *dn, uint32_t flags, void *tag, dmu_buf_t **dbp) 3670a586ceaSMark Shellenbaum { 3680a586ceaSMark Shellenbaum dmu_buf_impl_t *db = NULL; 3690a586ceaSMark Shellenbaum int err; 3700a586ceaSMark Shellenbaum 3710a586ceaSMark Shellenbaum if ((flags & DB_RF_HAVESTRUCT) == 0) 3720a586ceaSMark Shellenbaum rw_enter(&dn->dn_struct_rwlock, RW_READER); 3730a586ceaSMark Shellenbaum 3740a586ceaSMark Shellenbaum db = dbuf_hold(dn, DMU_SPILL_BLKID, tag); 3750a586ceaSMark Shellenbaum 3760a586ceaSMark Shellenbaum if ((flags & DB_RF_HAVESTRUCT) == 0) 3770a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 3780a586ceaSMark Shellenbaum 3790a586ceaSMark Shellenbaum ASSERT(db != NULL); 3801d8ccc7bSMark Shellenbaum err = dbuf_read(db, NULL, flags); 3811d8ccc7bSMark Shellenbaum if (err == 0) 3821d8ccc7bSMark Shellenbaum *dbp = &db->db; 3831d8ccc7bSMark Shellenbaum else 3841d8ccc7bSMark Shellenbaum dbuf_rele(db, tag); 3850a586ceaSMark Shellenbaum return (err); 3860a586ceaSMark Shellenbaum } 3870a586ceaSMark Shellenbaum 3880a586ceaSMark Shellenbaum int 3890a586ceaSMark Shellenbaum dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) 3900a586ceaSMark Shellenbaum { 391744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)bonus; 392744947dcSTom Erickson dnode_t *dn; 3930a586ceaSMark Shellenbaum int err; 3940a586ceaSMark Shellenbaum 395744947dcSTom Erickson DB_DNODE_ENTER(db); 396744947dcSTom Erickson dn = DB_DNODE(db); 397744947dcSTom Erickson 398744947dcSTom Erickson if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_SA) { 399be6fd75aSMatthew Ahrens err = SET_ERROR(EINVAL); 400744947dcSTom Erickson } else { 401744947dcSTom Erickson rw_enter(&dn->dn_struct_rwlock, RW_READER); 402744947dcSTom Erickson 403744947dcSTom Erickson if (!dn->dn_have_spill) { 404be6fd75aSMatthew Ahrens err = SET_ERROR(ENOENT); 405744947dcSTom Erickson } else { 406744947dcSTom Erickson err = dmu_spill_hold_by_dnode(dn, 407744947dcSTom Erickson DB_RF_HAVESTRUCT | DB_RF_CANFAIL, tag, dbp); 408744947dcSTom Erickson } 4090a586ceaSMark Shellenbaum 4100a586ceaSMark Shellenbaum rw_exit(&dn->dn_struct_rwlock); 4110a586ceaSMark Shellenbaum } 412744947dcSTom Erickson 413744947dcSTom Erickson DB_DNODE_EXIT(db); 4140a586ceaSMark Shellenbaum return (err); 4150a586ceaSMark Shellenbaum } 4160a586ceaSMark Shellenbaum 4170a586ceaSMark Shellenbaum int 4180a586ceaSMark Shellenbaum dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) 4190a586ceaSMark Shellenbaum { 420744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)bonus; 421744947dcSTom Erickson dnode_t *dn; 422744947dcSTom Erickson int err; 423744947dcSTom Erickson 424744947dcSTom Erickson DB_DNODE_ENTER(db); 425744947dcSTom Erickson dn = DB_DNODE(db); 426744947dcSTom Erickson err = dmu_spill_hold_by_dnode(dn, DB_RF_CANFAIL, tag, dbp); 427744947dcSTom Erickson DB_DNODE_EXIT(db); 428744947dcSTom Erickson 429744947dcSTom Erickson return (err); 4300a586ceaSMark Shellenbaum } 4310a586ceaSMark Shellenbaum 43213506d1eSmaybee /* 43313506d1eSmaybee * Note: longer-term, we should modify all of the dmu_buf_*() interfaces 43413506d1eSmaybee * to take a held dnode rather than <os, object> -- the lookup is wasteful, 43513506d1eSmaybee * and can induce severe lock contention when writing to several files 43613506d1eSmaybee * whose dnodes are in the same block. 43713506d1eSmaybee */ 43813506d1eSmaybee static int 4397bfdf011SNeil Perrin dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset, uint64_t length, 440cf6106c8SMatthew Ahrens boolean_t read, void *tag, int *numbufsp, dmu_buf_t ***dbpp, uint32_t flags) 441fa9e4066Sahrens { 442fa9e4066Sahrens dmu_buf_t **dbp; 443fa9e4066Sahrens uint64_t blkid, nblks, i; 4447bfdf011SNeil Perrin uint32_t dbuf_flags; 445ea8dc4b6Seschrock int err; 446ea8dc4b6Seschrock zio_t *zio; 447ea8dc4b6Seschrock 448ea8dc4b6Seschrock ASSERT(length <= DMU_MAX_ACCESS); 449fa9e4066Sahrens 450cf6106c8SMatthew Ahrens /* 451cf6106c8SMatthew Ahrens * Note: We directly notify the prefetch code of this read, so that 452cf6106c8SMatthew Ahrens * we can tell it about the multi-block read. dbuf_read() only knows 453cf6106c8SMatthew Ahrens * about the one block it is accessing. 454cf6106c8SMatthew Ahrens */ 455cf6106c8SMatthew Ahrens dbuf_flags = DB_RF_CANFAIL | DB_RF_NEVERWAIT | DB_RF_HAVESTRUCT | 456cf6106c8SMatthew Ahrens DB_RF_NOPREFETCH; 457ea8dc4b6Seschrock 458fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 459fa9e4066Sahrens if (dn->dn_datablkshift) { 460fa9e4066Sahrens int blkshift = dn->dn_datablkshift; 461cf6106c8SMatthew Ahrens nblks = (P2ROUNDUP(offset + length, 1ULL << blkshift) - 462cf6106c8SMatthew Ahrens P2ALIGN(offset, 1ULL << blkshift)) >> blkshift; 463fa9e4066Sahrens } else { 4640125049cSahrens if (offset + length > dn->dn_datablksz) { 4650125049cSahrens zfs_panic_recover("zfs: accessing past end of object " 4660125049cSahrens "%llx/%llx (size=%u access=%llu+%llu)", 4670125049cSahrens (longlong_t)dn->dn_objset-> 4680125049cSahrens os_dsl_dataset->ds_object, 4690125049cSahrens (longlong_t)dn->dn_object, dn->dn_datablksz, 4700125049cSahrens (longlong_t)offset, (longlong_t)length); 471c87b8fc5SMark J Musante rw_exit(&dn->dn_struct_rwlock); 472be6fd75aSMatthew Ahrens return (SET_ERROR(EIO)); 4730125049cSahrens } 474fa9e4066Sahrens nblks = 1; 475fa9e4066Sahrens } 476ea8dc4b6Seschrock dbp = kmem_zalloc(sizeof (dmu_buf_t *) * nblks, KM_SLEEP); 477fa9e4066Sahrens 478e14bb325SJeff Bonwick zio = zio_root(dn->dn_objset->os_spa, NULL, NULL, ZIO_FLAG_CANFAIL); 479a2cdcdd2SPaul Dagnelie blkid = dbuf_whichblock(dn, 0, offset); 480fa9e4066Sahrens for (i = 0; i < nblks; i++) { 481cf6106c8SMatthew Ahrens dmu_buf_impl_t *db = dbuf_hold(dn, blkid + i, tag); 482ea8dc4b6Seschrock if (db == NULL) { 483ea8dc4b6Seschrock rw_exit(&dn->dn_struct_rwlock); 484ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 485ea8dc4b6Seschrock zio_nowait(zio); 486be6fd75aSMatthew Ahrens return (SET_ERROR(EIO)); 487ea8dc4b6Seschrock } 488cf6106c8SMatthew Ahrens 489ea8dc4b6Seschrock /* initiate async i/o */ 490cf6106c8SMatthew Ahrens if (read) 4917bfdf011SNeil Perrin (void) dbuf_read(db, zio, dbuf_flags); 492ea8dc4b6Seschrock dbp[i] = &db->db; 493fa9e4066Sahrens } 494cf6106c8SMatthew Ahrens 495cb92f413SAlexander Motin if ((flags & DMU_READ_NO_PREFETCH) == 0 && 496cb92f413SAlexander Motin DNODE_META_IS_CACHEABLE(dn) && length <= zfetch_array_rd_sz) { 497cb92f413SAlexander Motin dmu_zfetch(&dn->dn_zfetch, blkid, nblks, 498cb92f413SAlexander Motin read && DNODE_IS_CACHEABLE(dn)); 499cf6106c8SMatthew Ahrens } 500fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 501fa9e4066Sahrens 502ea8dc4b6Seschrock /* wait for async i/o */ 503ea8dc4b6Seschrock err = zio_wait(zio); 504ea8dc4b6Seschrock if (err) { 505ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 506ea8dc4b6Seschrock return (err); 507ea8dc4b6Seschrock } 508fa9e4066Sahrens 509ea8dc4b6Seschrock /* wait for other io to complete */ 510ea8dc4b6Seschrock if (read) { 511ea8dc4b6Seschrock for (i = 0; i < nblks; i++) { 512ea8dc4b6Seschrock dmu_buf_impl_t *db = (dmu_buf_impl_t *)dbp[i]; 513ea8dc4b6Seschrock mutex_enter(&db->db_mtx); 514ea8dc4b6Seschrock while (db->db_state == DB_READ || 515ea8dc4b6Seschrock db->db_state == DB_FILL) 516ea8dc4b6Seschrock cv_wait(&db->db_changed, &db->db_mtx); 517ea8dc4b6Seschrock if (db->db_state == DB_UNCACHED) 518be6fd75aSMatthew Ahrens err = SET_ERROR(EIO); 519ea8dc4b6Seschrock mutex_exit(&db->db_mtx); 520ea8dc4b6Seschrock if (err) { 521ea8dc4b6Seschrock dmu_buf_rele_array(dbp, nblks, tag); 522ea8dc4b6Seschrock return (err); 523ea8dc4b6Seschrock } 524ea8dc4b6Seschrock } 525ea8dc4b6Seschrock } 526fa9e4066Sahrens 527ea8dc4b6Seschrock *numbufsp = nblks; 528ea8dc4b6Seschrock *dbpp = dbp; 529ea8dc4b6Seschrock return (0); 530fa9e4066Sahrens } 531fa9e4066Sahrens 532a2eea2e1Sahrens static int 53313506d1eSmaybee dmu_buf_hold_array(objset_t *os, uint64_t object, uint64_t offset, 53413506d1eSmaybee uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) 53513506d1eSmaybee { 53613506d1eSmaybee dnode_t *dn; 53713506d1eSmaybee int err; 53813506d1eSmaybee 539503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 54013506d1eSmaybee if (err) 54113506d1eSmaybee return (err); 54213506d1eSmaybee 54313506d1eSmaybee err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, 5447bfdf011SNeil Perrin numbufsp, dbpp, DMU_READ_PREFETCH); 54513506d1eSmaybee 54613506d1eSmaybee dnode_rele(dn, FTAG); 54713506d1eSmaybee 54813506d1eSmaybee return (err); 54913506d1eSmaybee } 55013506d1eSmaybee 55113506d1eSmaybee int 552744947dcSTom Erickson dmu_buf_hold_array_by_bonus(dmu_buf_t *db_fake, uint64_t offset, 553cf6106c8SMatthew Ahrens uint64_t length, boolean_t read, void *tag, int *numbufsp, 554cf6106c8SMatthew Ahrens dmu_buf_t ***dbpp) 55513506d1eSmaybee { 556744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 557744947dcSTom Erickson dnode_t *dn; 55813506d1eSmaybee int err; 55913506d1eSmaybee 560744947dcSTom Erickson DB_DNODE_ENTER(db); 561744947dcSTom Erickson dn = DB_DNODE(db); 56213506d1eSmaybee err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, 5637bfdf011SNeil Perrin numbufsp, dbpp, DMU_READ_PREFETCH); 564744947dcSTom Erickson DB_DNODE_EXIT(db); 56513506d1eSmaybee 56613506d1eSmaybee return (err); 56713506d1eSmaybee } 56813506d1eSmaybee 569fa9e4066Sahrens void 570ea8dc4b6Seschrock dmu_buf_rele_array(dmu_buf_t **dbp_fake, int numbufs, void *tag) 571fa9e4066Sahrens { 572fa9e4066Sahrens int i; 573fa9e4066Sahrens dmu_buf_impl_t **dbp = (dmu_buf_impl_t **)dbp_fake; 574fa9e4066Sahrens 575fa9e4066Sahrens if (numbufs == 0) 576fa9e4066Sahrens return; 577fa9e4066Sahrens 578ea8dc4b6Seschrock for (i = 0; i < numbufs; i++) { 579ea8dc4b6Seschrock if (dbp[i]) 580ea8dc4b6Seschrock dbuf_rele(dbp[i], tag); 581ea8dc4b6Seschrock } 582fa9e4066Sahrens 583fa9e4066Sahrens kmem_free(dbp, sizeof (dmu_buf_t *) * numbufs); 584fa9e4066Sahrens } 585fa9e4066Sahrens 58669962b56SMatthew Ahrens /* 587a2cdcdd2SPaul Dagnelie * Issue prefetch i/os for the given blocks. If level is greater than 0, the 588a2cdcdd2SPaul Dagnelie * indirect blocks prefeteched will be those that point to the blocks containing 589a2cdcdd2SPaul Dagnelie * the data starting at offset, and continuing to offset + len. 59069962b56SMatthew Ahrens * 591a2cdcdd2SPaul Dagnelie * Note that if the indirect blocks above the blocks being prefetched are not in 592a2cdcdd2SPaul Dagnelie * cache, they will be asychronously read in. 59369962b56SMatthew Ahrens */ 594fa9e4066Sahrens void 595a2cdcdd2SPaul Dagnelie dmu_prefetch(objset_t *os, uint64_t object, int64_t level, uint64_t offset, 596a2cdcdd2SPaul Dagnelie uint64_t len, zio_priority_t pri) 597fa9e4066Sahrens { 598fa9e4066Sahrens dnode_t *dn; 599fa9e4066Sahrens uint64_t blkid; 60069962b56SMatthew Ahrens int nblks, err; 601fa9e4066Sahrens 602fa9e4066Sahrens if (len == 0) { /* they're interested in the bonus buffer */ 603744947dcSTom Erickson dn = DMU_META_DNODE(os); 604fa9e4066Sahrens 605fa9e4066Sahrens if (object == 0 || object >= DN_MAX_OBJECT) 606fa9e4066Sahrens return; 607fa9e4066Sahrens 608fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 609a2cdcdd2SPaul Dagnelie blkid = dbuf_whichblock(dn, level, 610a2cdcdd2SPaul Dagnelie object * sizeof (dnode_phys_t)); 611a2cdcdd2SPaul Dagnelie dbuf_prefetch(dn, level, blkid, pri, 0); 612fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 613fa9e4066Sahrens return; 614fa9e4066Sahrens } 615fa9e4066Sahrens 616fa9e4066Sahrens /* 617fa9e4066Sahrens * XXX - Note, if the dnode for the requested object is not 618fa9e4066Sahrens * already cached, we will do a *synchronous* read in the 619fa9e4066Sahrens * dnode_hold() call. The same is true for any indirects. 620fa9e4066Sahrens */ 621503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 622ea8dc4b6Seschrock if (err != 0) 623fa9e4066Sahrens return; 624fa9e4066Sahrens 625fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 626a2cdcdd2SPaul Dagnelie /* 627a2cdcdd2SPaul Dagnelie * offset + len - 1 is the last byte we want to prefetch for, and offset 628a2cdcdd2SPaul Dagnelie * is the first. Then dbuf_whichblk(dn, level, off + len - 1) is the 629a2cdcdd2SPaul Dagnelie * last block we want to prefetch, and dbuf_whichblock(dn, level, 630a2cdcdd2SPaul Dagnelie * offset) is the first. Then the number we need to prefetch is the 631a2cdcdd2SPaul Dagnelie * last - first + 1. 632a2cdcdd2SPaul Dagnelie */ 633a2cdcdd2SPaul Dagnelie if (level > 0 || dn->dn_datablkshift != 0) { 634a2cdcdd2SPaul Dagnelie nblks = dbuf_whichblock(dn, level, offset + len - 1) - 635a2cdcdd2SPaul Dagnelie dbuf_whichblock(dn, level, offset) + 1; 636fa9e4066Sahrens } else { 637fa9e4066Sahrens nblks = (offset < dn->dn_datablksz); 638fa9e4066Sahrens } 639fa9e4066Sahrens 640fa9e4066Sahrens if (nblks != 0) { 641a2cdcdd2SPaul Dagnelie blkid = dbuf_whichblock(dn, level, offset); 64269962b56SMatthew Ahrens for (int i = 0; i < nblks; i++) 643a2cdcdd2SPaul Dagnelie dbuf_prefetch(dn, level, blkid + i, pri, 0); 644fa9e4066Sahrens } 645fa9e4066Sahrens 646fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 647fa9e4066Sahrens 648fa9e4066Sahrens dnode_rele(dn, FTAG); 649fa9e4066Sahrens } 650fa9e4066Sahrens 65176256205SMark Maybee /* 65276256205SMark Maybee * Get the next "chunk" of file data to free. We traverse the file from 65376256205SMark Maybee * the end so that the file gets shorter over time (if we crashes in the 65476256205SMark Maybee * middle, this will leave us in a better state). We find allocated file 65576256205SMark Maybee * data by simply searching the allocated level 1 indirects. 656713d6c20SMatthew Ahrens * 657713d6c20SMatthew Ahrens * On input, *start should be the first offset that does not need to be 658713d6c20SMatthew Ahrens * freed (e.g. "offset + length"). On return, *start will be the first 659713d6c20SMatthew Ahrens * offset that should be freed. 66076256205SMark Maybee */ 661cdb0ab79Smaybee static int 662713d6c20SMatthew Ahrens get_next_chunk(dnode_t *dn, uint64_t *start, uint64_t minimum) 663cdb0ab79Smaybee { 664713d6c20SMatthew Ahrens uint64_t maxblks = DMU_MAX_ACCESS >> (dn->dn_indblkshift + 1); 665713d6c20SMatthew Ahrens /* bytes of data covered by a level-1 indirect block */ 66676256205SMark Maybee uint64_t iblkrange = 6671c8564a7SMark Maybee dn->dn_datablksz * EPB(dn->dn_indblkshift, SPA_BLKPTRSHIFT); 668cdb0ab79Smaybee 669713d6c20SMatthew Ahrens ASSERT3U(minimum, <=, *start); 670cdb0ab79Smaybee 671713d6c20SMatthew Ahrens if (*start - minimum <= iblkrange * maxblks) { 672713d6c20SMatthew Ahrens *start = minimum; 673cdb0ab79Smaybee return (0); 674cdb0ab79Smaybee } 67576256205SMark Maybee ASSERT(ISP2(iblkrange)); 676cdb0ab79Smaybee 677713d6c20SMatthew Ahrens for (uint64_t blks = 0; *start > minimum && blks < maxblks; blks++) { 6781c8564a7SMark Maybee int err; 679cdb0ab79Smaybee 680713d6c20SMatthew Ahrens /* 681713d6c20SMatthew Ahrens * dnode_next_offset(BACKWARDS) will find an allocated L1 682713d6c20SMatthew Ahrens * indirect block at or before the input offset. We must 683713d6c20SMatthew Ahrens * decrement *start so that it is at the end of the region 684713d6c20SMatthew Ahrens * to search. 685713d6c20SMatthew Ahrens */ 686713d6c20SMatthew Ahrens (*start)--; 687cdb0ab79Smaybee err = dnode_next_offset(dn, 68876256205SMark Maybee DNODE_FIND_BACKWARDS, start, 2, 1, 0); 689cdb0ab79Smaybee 690713d6c20SMatthew Ahrens /* if there are no indirect blocks before start, we are done */ 69176256205SMark Maybee if (err == ESRCH) { 692713d6c20SMatthew Ahrens *start = minimum; 693713d6c20SMatthew Ahrens break; 694713d6c20SMatthew Ahrens } else if (err != 0) { 695cdb0ab79Smaybee return (err); 69676256205SMark Maybee } 69776256205SMark Maybee 698713d6c20SMatthew Ahrens /* set start to the beginning of this L1 indirect */ 69976256205SMark Maybee *start = P2ALIGN(*start, iblkrange); 700cdb0ab79Smaybee } 701713d6c20SMatthew Ahrens if (*start < minimum) 702713d6c20SMatthew Ahrens *start = minimum; 703cdb0ab79Smaybee return (0); 704cdb0ab79Smaybee } 705cdb0ab79Smaybee 706eb721827SAlek Pinchuk /* 707eb721827SAlek Pinchuk * If this objset is of type OST_ZFS return true if vfs's unmounted flag is set, 708eb721827SAlek Pinchuk * otherwise return false. 709eb721827SAlek Pinchuk * Used below in dmu_free_long_range_impl() to enable abort when unmounting 710eb721827SAlek Pinchuk */ 711eb721827SAlek Pinchuk /*ARGSUSED*/ 712eb721827SAlek Pinchuk static boolean_t 713eb721827SAlek Pinchuk dmu_objset_zfs_unmounting(objset_t *os) 714eb721827SAlek Pinchuk { 715eb721827SAlek Pinchuk #ifdef _KERNEL 716eb721827SAlek Pinchuk if (dmu_objset_type(os) == DMU_OST_ZFS) 717eb721827SAlek Pinchuk return (zfs_get_vfs_flag_unmounted(os)); 718eb721827SAlek Pinchuk #endif 719eb721827SAlek Pinchuk return (B_FALSE); 720eb721827SAlek Pinchuk } 721eb721827SAlek Pinchuk 722cdb0ab79Smaybee static int 723cdb0ab79Smaybee dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset, 724713d6c20SMatthew Ahrens uint64_t length) 725cdb0ab79Smaybee { 726713d6c20SMatthew Ahrens uint64_t object_size = (dn->dn_maxblkid + 1) * dn->dn_datablksz; 727713d6c20SMatthew Ahrens int err; 728*ff5177eeSAlek Pinchuk uint64_t dirty_frees_threshold; 729*ff5177eeSAlek Pinchuk dsl_pool_t *dp = dmu_objset_pool(os); 730713d6c20SMatthew Ahrens 731713d6c20SMatthew Ahrens if (offset >= object_size) 732cdb0ab79Smaybee return (0); 733cdb0ab79Smaybee 734*ff5177eeSAlek Pinchuk if (zfs_per_txg_dirty_frees_percent <= 100) 735*ff5177eeSAlek Pinchuk dirty_frees_threshold = 736*ff5177eeSAlek Pinchuk zfs_per_txg_dirty_frees_percent * zfs_dirty_data_max / 100; 737*ff5177eeSAlek Pinchuk else 738*ff5177eeSAlek Pinchuk dirty_frees_threshold = zfs_dirty_data_max / 4; 739*ff5177eeSAlek Pinchuk 740713d6c20SMatthew Ahrens if (length == DMU_OBJECT_END || offset + length > object_size) 741713d6c20SMatthew Ahrens length = object_size - offset; 742713d6c20SMatthew Ahrens 743713d6c20SMatthew Ahrens while (length != 0) { 744*ff5177eeSAlek Pinchuk uint64_t chunk_end, chunk_begin, chunk_len; 745*ff5177eeSAlek Pinchuk uint64_t long_free_dirty_all_txgs = 0; 746*ff5177eeSAlek Pinchuk dmu_tx_t *tx; 747713d6c20SMatthew Ahrens 748eb721827SAlek Pinchuk if (dmu_objset_zfs_unmounting(dn->dn_objset)) 749eb721827SAlek Pinchuk return (SET_ERROR(EINTR)); 750eb721827SAlek Pinchuk 751713d6c20SMatthew Ahrens chunk_end = chunk_begin = offset + length; 752713d6c20SMatthew Ahrens 753713d6c20SMatthew Ahrens /* move chunk_begin backwards to the beginning of this chunk */ 754713d6c20SMatthew Ahrens err = get_next_chunk(dn, &chunk_begin, offset); 755cdb0ab79Smaybee if (err) 756cdb0ab79Smaybee return (err); 757713d6c20SMatthew Ahrens ASSERT3U(chunk_begin, >=, offset); 758713d6c20SMatthew Ahrens ASSERT3U(chunk_begin, <=, chunk_end); 759cdb0ab79Smaybee 760*ff5177eeSAlek Pinchuk chunk_len = chunk_end - chunk_begin; 761*ff5177eeSAlek Pinchuk 762*ff5177eeSAlek Pinchuk mutex_enter(&dp->dp_lock); 763*ff5177eeSAlek Pinchuk for (int t = 0; t < TXG_SIZE; t++) { 764*ff5177eeSAlek Pinchuk long_free_dirty_all_txgs += 765*ff5177eeSAlek Pinchuk dp->dp_long_free_dirty_pertxg[t]; 766*ff5177eeSAlek Pinchuk } 767*ff5177eeSAlek Pinchuk mutex_exit(&dp->dp_lock); 768*ff5177eeSAlek Pinchuk 769*ff5177eeSAlek Pinchuk /* 770*ff5177eeSAlek Pinchuk * To avoid filling up a TXG with just frees wait for 771*ff5177eeSAlek Pinchuk * the next TXG to open before freeing more chunks if 772*ff5177eeSAlek Pinchuk * we have reached the threshold of frees 773*ff5177eeSAlek Pinchuk */ 774*ff5177eeSAlek Pinchuk if (dirty_frees_threshold != 0 && 775*ff5177eeSAlek Pinchuk long_free_dirty_all_txgs >= dirty_frees_threshold) { 776*ff5177eeSAlek Pinchuk txg_wait_open(dp, 0); 777*ff5177eeSAlek Pinchuk continue; 778*ff5177eeSAlek Pinchuk } 779*ff5177eeSAlek Pinchuk 780*ff5177eeSAlek Pinchuk tx = dmu_tx_create(os); 781*ff5177eeSAlek Pinchuk dmu_tx_hold_free(tx, dn->dn_object, chunk_begin, chunk_len); 7824bb73804SMatthew Ahrens 7834bb73804SMatthew Ahrens /* 7844bb73804SMatthew Ahrens * Mark this transaction as typically resulting in a net 7854bb73804SMatthew Ahrens * reduction in space used. 7864bb73804SMatthew Ahrens */ 7874bb73804SMatthew Ahrens dmu_tx_mark_netfree(tx); 788cdb0ab79Smaybee err = dmu_tx_assign(tx, TXG_WAIT); 789cdb0ab79Smaybee if (err) { 790cdb0ab79Smaybee dmu_tx_abort(tx); 791cdb0ab79Smaybee return (err); 792cdb0ab79Smaybee } 793*ff5177eeSAlek Pinchuk 794*ff5177eeSAlek Pinchuk mutex_enter(&dp->dp_lock); 795*ff5177eeSAlek Pinchuk dp->dp_long_free_dirty_pertxg[dmu_tx_get_txg(tx) & TXG_MASK] += 796*ff5177eeSAlek Pinchuk chunk_len; 797*ff5177eeSAlek Pinchuk mutex_exit(&dp->dp_lock); 798*ff5177eeSAlek Pinchuk DTRACE_PROBE3(free__long__range, 799*ff5177eeSAlek Pinchuk uint64_t, long_free_dirty_all_txgs, uint64_t, chunk_len, 800*ff5177eeSAlek Pinchuk uint64_t, dmu_tx_get_txg(tx)); 801*ff5177eeSAlek Pinchuk dnode_free_range(dn, chunk_begin, chunk_len, tx); 802cdb0ab79Smaybee dmu_tx_commit(tx); 803713d6c20SMatthew Ahrens 804*ff5177eeSAlek Pinchuk length -= chunk_len; 805cdb0ab79Smaybee } 806cdb0ab79Smaybee return (0); 807cdb0ab79Smaybee } 808cdb0ab79Smaybee 809cdb0ab79Smaybee int 810cdb0ab79Smaybee dmu_free_long_range(objset_t *os, uint64_t object, 811cdb0ab79Smaybee uint64_t offset, uint64_t length) 812cdb0ab79Smaybee { 813cdb0ab79Smaybee dnode_t *dn; 814cdb0ab79Smaybee int err; 815cdb0ab79Smaybee 816503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 817cdb0ab79Smaybee if (err != 0) 818cdb0ab79Smaybee return (err); 819713d6c20SMatthew Ahrens err = dmu_free_long_range_impl(os, dn, offset, length); 8205253393bSMatthew Ahrens 8215253393bSMatthew Ahrens /* 8225253393bSMatthew Ahrens * It is important to zero out the maxblkid when freeing the entire 8235253393bSMatthew Ahrens * file, so that (a) subsequent calls to dmu_free_long_range_impl() 8245253393bSMatthew Ahrens * will take the fast path, and (b) dnode_reallocate() can verify 8255253393bSMatthew Ahrens * that the entire file has been freed. 8265253393bSMatthew Ahrens */ 82743466aaeSMax Grossman if (err == 0 && offset == 0 && length == DMU_OBJECT_END) 8285253393bSMatthew Ahrens dn->dn_maxblkid = 0; 8295253393bSMatthew Ahrens 830cdb0ab79Smaybee dnode_rele(dn, FTAG); 831cdb0ab79Smaybee return (err); 832cdb0ab79Smaybee } 833cdb0ab79Smaybee 834cdb0ab79Smaybee int 835713d6c20SMatthew Ahrens dmu_free_long_object(objset_t *os, uint64_t object) 836cdb0ab79Smaybee { 837cdb0ab79Smaybee dmu_tx_t *tx; 838cdb0ab79Smaybee int err; 839cdb0ab79Smaybee 840713d6c20SMatthew Ahrens err = dmu_free_long_range(os, object, 0, DMU_OBJECT_END); 841cdb0ab79Smaybee if (err != 0) 842cdb0ab79Smaybee return (err); 843713d6c20SMatthew Ahrens 844713d6c20SMatthew Ahrens tx = dmu_tx_create(os); 845713d6c20SMatthew Ahrens dmu_tx_hold_bonus(tx, object); 846713d6c20SMatthew Ahrens dmu_tx_hold_free(tx, object, 0, DMU_OBJECT_END); 8474bb73804SMatthew Ahrens dmu_tx_mark_netfree(tx); 848713d6c20SMatthew Ahrens err = dmu_tx_assign(tx, TXG_WAIT); 849713d6c20SMatthew Ahrens if (err == 0) { 850713d6c20SMatthew Ahrens err = dmu_object_free(os, object, tx); 851713d6c20SMatthew Ahrens dmu_tx_commit(tx); 852cdb0ab79Smaybee } else { 853713d6c20SMatthew Ahrens dmu_tx_abort(tx); 854cdb0ab79Smaybee } 855713d6c20SMatthew Ahrens 856cdb0ab79Smaybee return (err); 857cdb0ab79Smaybee } 858cdb0ab79Smaybee 859ea8dc4b6Seschrock int 860fa9e4066Sahrens dmu_free_range(objset_t *os, uint64_t object, uint64_t offset, 861fa9e4066Sahrens uint64_t size, dmu_tx_t *tx) 862fa9e4066Sahrens { 863ea8dc4b6Seschrock dnode_t *dn; 864503ad85cSMatthew Ahrens int err = dnode_hold(os, object, FTAG, &dn); 865ea8dc4b6Seschrock if (err) 866ea8dc4b6Seschrock return (err); 867fa9e4066Sahrens ASSERT(offset < UINT64_MAX); 868fa9e4066Sahrens ASSERT(size == -1ULL || size <= UINT64_MAX - offset); 869fa9e4066Sahrens dnode_free_range(dn, offset, size, tx); 870fa9e4066Sahrens dnode_rele(dn, FTAG); 871ea8dc4b6Seschrock return (0); 872fa9e4066Sahrens } 873fa9e4066Sahrens 874ea8dc4b6Seschrock int 875ea8dc4b6Seschrock dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 8767bfdf011SNeil Perrin void *buf, uint32_t flags) 877fa9e4066Sahrens { 878fa9e4066Sahrens dnode_t *dn; 879fa9e4066Sahrens dmu_buf_t **dbp; 880c87b8fc5SMark J Musante int numbufs, err; 881fa9e4066Sahrens 882503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 883ea8dc4b6Seschrock if (err) 884ea8dc4b6Seschrock return (err); 885feb08c6bSbillm 886feb08c6bSbillm /* 887feb08c6bSbillm * Deal with odd block sizes, where there can't be data past the first 888feb08c6bSbillm * block. If we ever do the tail block optimization, we will need to 889feb08c6bSbillm * handle that here as well. 890feb08c6bSbillm */ 891c87b8fc5SMark J Musante if (dn->dn_maxblkid == 0) { 892fa9e4066Sahrens int newsz = offset > dn->dn_datablksz ? 0 : 893fa9e4066Sahrens MIN(size, dn->dn_datablksz - offset); 894fa9e4066Sahrens bzero((char *)buf + newsz, size - newsz); 895fa9e4066Sahrens size = newsz; 896fa9e4066Sahrens } 897fa9e4066Sahrens 898fa9e4066Sahrens while (size > 0) { 899fa9e4066Sahrens uint64_t mylen = MIN(size, DMU_MAX_ACCESS / 2); 900c87b8fc5SMark J Musante int i; 901fa9e4066Sahrens 902fa9e4066Sahrens /* 903fa9e4066Sahrens * NB: we could do this block-at-a-time, but it's nice 904fa9e4066Sahrens * to be reading in parallel. 905fa9e4066Sahrens */ 906a2eea2e1Sahrens err = dmu_buf_hold_array_by_dnode(dn, offset, mylen, 9077bfdf011SNeil Perrin TRUE, FTAG, &numbufs, &dbp, flags); 908ea8dc4b6Seschrock if (err) 9091934e92fSmaybee break; 910fa9e4066Sahrens 911fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 912fa9e4066Sahrens int tocpy; 913fa9e4066Sahrens int bufoff; 914fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 915fa9e4066Sahrens 916fa9e4066Sahrens ASSERT(size > 0); 917fa9e4066Sahrens 918fa9e4066Sahrens bufoff = offset - db->db_offset; 919fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 920fa9e4066Sahrens 921fa9e4066Sahrens bcopy((char *)db->db_data + bufoff, buf, tocpy); 922fa9e4066Sahrens 923fa9e4066Sahrens offset += tocpy; 924fa9e4066Sahrens size -= tocpy; 925fa9e4066Sahrens buf = (char *)buf + tocpy; 926fa9e4066Sahrens } 927ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 928fa9e4066Sahrens } 929a2eea2e1Sahrens dnode_rele(dn, FTAG); 9301934e92fSmaybee return (err); 931fa9e4066Sahrens } 932fa9e4066Sahrens 933fa9e4066Sahrens void 934fa9e4066Sahrens dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 935fa9e4066Sahrens const void *buf, dmu_tx_t *tx) 936fa9e4066Sahrens { 937fa9e4066Sahrens dmu_buf_t **dbp; 938fa9e4066Sahrens int numbufs, i; 939fa9e4066Sahrens 94013506d1eSmaybee if (size == 0) 94113506d1eSmaybee return; 94213506d1eSmaybee 943ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, 944ea8dc4b6Seschrock FALSE, FTAG, &numbufs, &dbp)); 945fa9e4066Sahrens 946fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 947fa9e4066Sahrens int tocpy; 948fa9e4066Sahrens int bufoff; 949fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 950fa9e4066Sahrens 951fa9e4066Sahrens ASSERT(size > 0); 952fa9e4066Sahrens 953fa9e4066Sahrens bufoff = offset - db->db_offset; 954fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 955fa9e4066Sahrens 956fa9e4066Sahrens ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 957fa9e4066Sahrens 958fa9e4066Sahrens if (tocpy == db->db_size) 959fa9e4066Sahrens dmu_buf_will_fill(db, tx); 960fa9e4066Sahrens else 961fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 962fa9e4066Sahrens 963fa9e4066Sahrens bcopy(buf, (char *)db->db_data + bufoff, tocpy); 964fa9e4066Sahrens 965fa9e4066Sahrens if (tocpy == db->db_size) 966fa9e4066Sahrens dmu_buf_fill_done(db, tx); 967fa9e4066Sahrens 968fa9e4066Sahrens offset += tocpy; 969fa9e4066Sahrens size -= tocpy; 970fa9e4066Sahrens buf = (char *)buf + tocpy; 971fa9e4066Sahrens } 972ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 973fa9e4066Sahrens } 974fa9e4066Sahrens 97582c9918fSTim Haley void 97682c9918fSTim Haley dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 97782c9918fSTim Haley dmu_tx_t *tx) 97882c9918fSTim Haley { 97982c9918fSTim Haley dmu_buf_t **dbp; 98082c9918fSTim Haley int numbufs, i; 98182c9918fSTim Haley 98282c9918fSTim Haley if (size == 0) 98382c9918fSTim Haley return; 98482c9918fSTim Haley 98582c9918fSTim Haley VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, 98682c9918fSTim Haley FALSE, FTAG, &numbufs, &dbp)); 98782c9918fSTim Haley 98882c9918fSTim Haley for (i = 0; i < numbufs; i++) { 98982c9918fSTim Haley dmu_buf_t *db = dbp[i]; 99082c9918fSTim Haley 99182c9918fSTim Haley dmu_buf_will_not_fill(db, tx); 99282c9918fSTim Haley } 99382c9918fSTim Haley dmu_buf_rele_array(dbp, numbufs, FTAG); 99482c9918fSTim Haley } 99582c9918fSTim Haley 9965d7b4d43SMatthew Ahrens void 9975d7b4d43SMatthew Ahrens dmu_write_embedded(objset_t *os, uint64_t object, uint64_t offset, 9985d7b4d43SMatthew Ahrens void *data, uint8_t etype, uint8_t comp, int uncompressed_size, 9995d7b4d43SMatthew Ahrens int compressed_size, int byteorder, dmu_tx_t *tx) 10005d7b4d43SMatthew Ahrens { 10015d7b4d43SMatthew Ahrens dmu_buf_t *db; 10025d7b4d43SMatthew Ahrens 10035d7b4d43SMatthew Ahrens ASSERT3U(etype, <, NUM_BP_EMBEDDED_TYPES); 10045d7b4d43SMatthew Ahrens ASSERT3U(comp, <, ZIO_COMPRESS_FUNCTIONS); 10055d7b4d43SMatthew Ahrens VERIFY0(dmu_buf_hold_noread(os, object, offset, 10065d7b4d43SMatthew Ahrens FTAG, &db)); 10075d7b4d43SMatthew Ahrens 10085d7b4d43SMatthew Ahrens dmu_buf_write_embedded(db, 10095d7b4d43SMatthew Ahrens data, (bp_embedded_type_t)etype, (enum zio_compress)comp, 10105d7b4d43SMatthew Ahrens uncompressed_size, compressed_size, byteorder, tx); 10115d7b4d43SMatthew Ahrens 10125d7b4d43SMatthew Ahrens dmu_buf_rele(db, FTAG); 10135d7b4d43SMatthew Ahrens } 10145d7b4d43SMatthew Ahrens 1015c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 1016c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * DMU support for xuio 1017c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 1018c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_t *xuio_ksp = NULL; 1019c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1020c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 1021c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_init(xuio_t *xuio, int nblk) 1022c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 1023c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv; 1024c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 1025c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1026c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_iovcnt = nblk; 1027c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_iov = kmem_zalloc(nblk * sizeof (iovec_t), KM_SLEEP); 1028c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1029c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv = kmem_zalloc(sizeof (dmu_xuio_t), KM_SLEEP); 1030c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->cnt = nblk; 1031c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs = kmem_zalloc(nblk * sizeof (arc_buf_t *), KM_SLEEP); 1032c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->iovp = uio->uio_iov; 1033c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIO_XUZC_PRIV(xuio) = priv; 1034c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1035c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (XUIO_XUZC_RW(xuio) == UIO_READ) 1036c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_rbuf, nblk); 1037c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 1038c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_wbuf, nblk); 1039c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1040c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 1041c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1042c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1043c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 1044c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_fini(xuio_t *xuio) 1045c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 1046c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 1047c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int nblk = priv->cnt; 1048c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1049c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv->iovp, nblk * sizeof (iovec_t)); 1050c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv->bufs, nblk * sizeof (arc_buf_t *)); 1051c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kmem_free(priv, sizeof (dmu_xuio_t)); 1052c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1053c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (XUIO_XUZC_RW(xuio) == UIO_READ) 1054c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_rbuf, -nblk); 1055c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 1056c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_INCR(xuiostat_onloan_wbuf, -nblk); 1057c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1058c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1059c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 1060c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Initialize iov[priv->next] and priv->bufs[priv->next] with { off, n, abuf } 1061c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * and increase priv->next by 1. 1062c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 1063c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 1064c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_add(xuio_t *xuio, arc_buf_t *abuf, offset_t off, size_t n) 1065c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 1066c242f9a0Schunli zhang - Sun Microsystems - Irvine United States struct iovec *iov; 1067c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 1068c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 1069c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int i = priv->next++; 1070c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1071c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 10725602294fSDan Kimmel ASSERT(off + n <= arc_buf_lsize(abuf)); 1073c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov = uio->uio_iov + i; 1074c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov->iov_base = (char *)abuf->b_data + off; 1075c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iov->iov_len = n; 1076c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs[i] = abuf; 1077c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 1078c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1079c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1080c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int 1081c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_cnt(xuio_t *xuio) 1082c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 1083c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 1084c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (priv->cnt); 1085c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1086c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1087c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t * 1088c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_arcbuf(xuio_t *xuio, int i) 1089c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 1090c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 1091c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1092c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 1093c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (priv->bufs[i]); 1094c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1095c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1096c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 1097c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_clear(xuio_t *xuio, int i) 1098c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 1099c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); 1100c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1101c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i < priv->cnt); 1102c242f9a0Schunli zhang - Sun Microsystems - Irvine United States priv->bufs[i] = NULL; 1103c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1104c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1105c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static void 1106c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_init(void) 1107c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 1108c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp = kstat_create("zfs", 0, "xuio_stats", "misc", 1109c242f9a0Schunli zhang - Sun Microsystems - Irvine United States KSTAT_TYPE_NAMED, sizeof (xuio_stats) / sizeof (kstat_named_t), 1110c242f9a0Schunli zhang - Sun Microsystems - Irvine United States KSTAT_FLAG_VIRTUAL); 1111c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio_ksp != NULL) { 1112c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp->ks_data = &xuio_stats; 1113c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_install(xuio_ksp); 1114c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1115c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1116c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1117c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static void 1118c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_fini(void) 1119c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 1120c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio_ksp != NULL) { 1121c242f9a0Schunli zhang - Sun Microsystems - Irvine United States kstat_delete(xuio_ksp); 1122c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_ksp = NULL; 1123c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1124c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1125c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1126c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 112799aa8b55SPrashanth Sreenivasa xuio_stat_wbuf_copied(void) 1128c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 1129c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_copied); 1130c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1131c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1132c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void 113399aa8b55SPrashanth Sreenivasa xuio_stat_wbuf_nocopy(void) 1134c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 1135c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_nocopy); 1136c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1137c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1138fa9e4066Sahrens #ifdef _KERNEL 1139f8554bb9SMatthew Ahrens static int 1140f8554bb9SMatthew Ahrens dmu_read_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size) 1141feb08c6bSbillm { 1142feb08c6bSbillm dmu_buf_t **dbp; 1143feb08c6bSbillm int numbufs, i, err; 1144c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_t *xuio = NULL; 1145feb08c6bSbillm 1146feb08c6bSbillm /* 1147feb08c6bSbillm * NB: we could do this block-at-a-time, but it's nice 1148feb08c6bSbillm * to be reading in parallel. 1149feb08c6bSbillm */ 1150f8554bb9SMatthew Ahrens err = dmu_buf_hold_array_by_dnode(dn, uio->uio_loffset, size, 1151f8554bb9SMatthew Ahrens TRUE, FTAG, &numbufs, &dbp, 0); 1152feb08c6bSbillm if (err) 1153feb08c6bSbillm return (err); 1154feb08c6bSbillm 1155c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (uio->uio_extflg == UIO_XUIO) 1156c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio = (xuio_t *)uio; 1157c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1158feb08c6bSbillm for (i = 0; i < numbufs; i++) { 1159feb08c6bSbillm int tocpy; 1160feb08c6bSbillm int bufoff; 1161feb08c6bSbillm dmu_buf_t *db = dbp[i]; 1162feb08c6bSbillm 1163feb08c6bSbillm ASSERT(size > 0); 1164feb08c6bSbillm 1165feb08c6bSbillm bufoff = uio->uio_loffset - db->db_offset; 1166feb08c6bSbillm tocpy = (int)MIN(db->db_size - bufoff, size); 1167feb08c6bSbillm 1168c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio) { 1169c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db; 1170c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *dbuf_abuf = dbi->db_buf; 1171c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *abuf = dbuf_loan_arcbuf(dbi); 1172c242f9a0Schunli zhang - Sun Microsystems - Irvine United States err = dmu_xuio_add(xuio, abuf, bufoff, tocpy); 1173c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (!err) { 1174c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_resid -= tocpy; 1175c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_loffset += tocpy; 1176c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1177c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 1178c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (abuf == dbuf_abuf) 1179c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_rbuf_nocopy); 1180c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 1181c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_rbuf_copied); 1182c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else { 1183c242f9a0Schunli zhang - Sun Microsystems - Irvine United States err = uiomove((char *)db->db_data + bufoff, tocpy, 1184c242f9a0Schunli zhang - Sun Microsystems - Irvine United States UIO_READ, uio); 1185c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 1186feb08c6bSbillm if (err) 1187feb08c6bSbillm break; 1188feb08c6bSbillm 1189feb08c6bSbillm size -= tocpy; 1190feb08c6bSbillm } 1191feb08c6bSbillm dmu_buf_rele_array(dbp, numbufs, FTAG); 1192feb08c6bSbillm 1193feb08c6bSbillm return (err); 1194feb08c6bSbillm } 1195feb08c6bSbillm 1196f8554bb9SMatthew Ahrens /* 1197f8554bb9SMatthew Ahrens * Read 'size' bytes into the uio buffer. 1198f8554bb9SMatthew Ahrens * From object zdb->db_object. 1199f8554bb9SMatthew Ahrens * Starting at offset uio->uio_loffset. 1200f8554bb9SMatthew Ahrens * 1201f8554bb9SMatthew Ahrens * If the caller already has a dbuf in the target object 1202f8554bb9SMatthew Ahrens * (e.g. its bonus buffer), this routine is faster than dmu_read_uio(), 1203f8554bb9SMatthew Ahrens * because we don't have to find the dnode_t for the object. 1204f8554bb9SMatthew Ahrens */ 1205f8554bb9SMatthew Ahrens int 1206f8554bb9SMatthew Ahrens dmu_read_uio_dbuf(dmu_buf_t *zdb, uio_t *uio, uint64_t size) 1207f8554bb9SMatthew Ahrens { 1208f8554bb9SMatthew Ahrens dmu_buf_impl_t *db = (dmu_buf_impl_t *)zdb; 1209f8554bb9SMatthew Ahrens dnode_t *dn; 1210f8554bb9SMatthew Ahrens int err; 1211f8554bb9SMatthew Ahrens 1212f8554bb9SMatthew Ahrens if (size == 0) 1213f8554bb9SMatthew Ahrens return (0); 1214f8554bb9SMatthew Ahrens 1215f8554bb9SMatthew Ahrens DB_DNODE_ENTER(db); 1216f8554bb9SMatthew Ahrens dn = DB_DNODE(db); 1217f8554bb9SMatthew Ahrens err = dmu_read_uio_dnode(dn, uio, size); 1218f8554bb9SMatthew Ahrens DB_DNODE_EXIT(db); 1219f8554bb9SMatthew Ahrens 1220f8554bb9SMatthew Ahrens return (err); 1221f8554bb9SMatthew Ahrens } 1222f8554bb9SMatthew Ahrens 1223f8554bb9SMatthew Ahrens /* 1224f8554bb9SMatthew Ahrens * Read 'size' bytes into the uio buffer. 1225f8554bb9SMatthew Ahrens * From the specified object 1226f8554bb9SMatthew Ahrens * Starting at offset uio->uio_loffset. 1227f8554bb9SMatthew Ahrens */ 1228f8554bb9SMatthew Ahrens int 1229f8554bb9SMatthew Ahrens dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size) 1230f8554bb9SMatthew Ahrens { 1231f8554bb9SMatthew Ahrens dnode_t *dn; 1232f8554bb9SMatthew Ahrens int err; 1233f8554bb9SMatthew Ahrens 1234f8554bb9SMatthew Ahrens if (size == 0) 1235f8554bb9SMatthew Ahrens return (0); 1236f8554bb9SMatthew Ahrens 1237f8554bb9SMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1238f8554bb9SMatthew Ahrens if (err) 1239f8554bb9SMatthew Ahrens return (err); 1240f8554bb9SMatthew Ahrens 1241f8554bb9SMatthew Ahrens err = dmu_read_uio_dnode(dn, uio, size); 1242f8554bb9SMatthew Ahrens 1243f8554bb9SMatthew Ahrens dnode_rele(dn, FTAG); 1244f8554bb9SMatthew Ahrens 1245f8554bb9SMatthew Ahrens return (err); 1246f8554bb9SMatthew Ahrens } 1247f8554bb9SMatthew Ahrens 124894d1a210STim Haley static int 124994d1a210STim Haley dmu_write_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size, dmu_tx_t *tx) 1250fa9e4066Sahrens { 1251fa9e4066Sahrens dmu_buf_t **dbp; 125294d1a210STim Haley int numbufs; 1253fa9e4066Sahrens int err = 0; 125494d1a210STim Haley int i; 1255fa9e4066Sahrens 125694d1a210STim Haley err = dmu_buf_hold_array_by_dnode(dn, uio->uio_loffset, size, 125794d1a210STim Haley FALSE, FTAG, &numbufs, &dbp, DMU_READ_PREFETCH); 1258ea8dc4b6Seschrock if (err) 1259ea8dc4b6Seschrock return (err); 1260fa9e4066Sahrens 1261fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 1262fa9e4066Sahrens int tocpy; 1263fa9e4066Sahrens int bufoff; 1264fa9e4066Sahrens dmu_buf_t *db = dbp[i]; 1265fa9e4066Sahrens 1266fa9e4066Sahrens ASSERT(size > 0); 1267fa9e4066Sahrens 1268feb08c6bSbillm bufoff = uio->uio_loffset - db->db_offset; 1269fa9e4066Sahrens tocpy = (int)MIN(db->db_size - bufoff, size); 1270fa9e4066Sahrens 1271fa9e4066Sahrens ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 1272fa9e4066Sahrens 1273fa9e4066Sahrens if (tocpy == db->db_size) 1274fa9e4066Sahrens dmu_buf_will_fill(db, tx); 1275fa9e4066Sahrens else 1276fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 1277fa9e4066Sahrens 1278fa9e4066Sahrens /* 1279fa9e4066Sahrens * XXX uiomove could block forever (eg. nfs-backed 1280fa9e4066Sahrens * pages). There needs to be a uiolockdown() function 1281fa9e4066Sahrens * to lock the pages in memory, so that uiomove won't 1282fa9e4066Sahrens * block. 1283fa9e4066Sahrens */ 1284fa9e4066Sahrens err = uiomove((char *)db->db_data + bufoff, tocpy, 1285fa9e4066Sahrens UIO_WRITE, uio); 1286fa9e4066Sahrens 1287fa9e4066Sahrens if (tocpy == db->db_size) 1288fa9e4066Sahrens dmu_buf_fill_done(db, tx); 1289fa9e4066Sahrens 1290fa9e4066Sahrens if (err) 1291fa9e4066Sahrens break; 1292fa9e4066Sahrens 1293fa9e4066Sahrens size -= tocpy; 1294fa9e4066Sahrens } 129594d1a210STim Haley 1296ea8dc4b6Seschrock dmu_buf_rele_array(dbp, numbufs, FTAG); 1297fa9e4066Sahrens return (err); 1298fa9e4066Sahrens } 129944eda4d7Smaybee 1300f8554bb9SMatthew Ahrens /* 1301f8554bb9SMatthew Ahrens * Write 'size' bytes from the uio buffer. 1302f8554bb9SMatthew Ahrens * To object zdb->db_object. 1303f8554bb9SMatthew Ahrens * Starting at offset uio->uio_loffset. 1304f8554bb9SMatthew Ahrens * 1305f8554bb9SMatthew Ahrens * If the caller already has a dbuf in the target object 1306f8554bb9SMatthew Ahrens * (e.g. its bonus buffer), this routine is faster than dmu_write_uio(), 1307f8554bb9SMatthew Ahrens * because we don't have to find the dnode_t for the object. 1308f8554bb9SMatthew Ahrens */ 130994d1a210STim Haley int 131094d1a210STim Haley dmu_write_uio_dbuf(dmu_buf_t *zdb, uio_t *uio, uint64_t size, 131194d1a210STim Haley dmu_tx_t *tx) 131294d1a210STim Haley { 1313744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)zdb; 1314744947dcSTom Erickson dnode_t *dn; 1315744947dcSTom Erickson int err; 1316744947dcSTom Erickson 131794d1a210STim Haley if (size == 0) 131894d1a210STim Haley return (0); 131994d1a210STim Haley 1320744947dcSTom Erickson DB_DNODE_ENTER(db); 1321744947dcSTom Erickson dn = DB_DNODE(db); 1322744947dcSTom Erickson err = dmu_write_uio_dnode(dn, uio, size, tx); 1323744947dcSTom Erickson DB_DNODE_EXIT(db); 1324744947dcSTom Erickson 1325744947dcSTom Erickson return (err); 132694d1a210STim Haley } 132794d1a210STim Haley 1328f8554bb9SMatthew Ahrens /* 1329f8554bb9SMatthew Ahrens * Write 'size' bytes from the uio buffer. 1330f8554bb9SMatthew Ahrens * To the specified object. 1331f8554bb9SMatthew Ahrens * Starting at offset uio->uio_loffset. 1332f8554bb9SMatthew Ahrens */ 133394d1a210STim Haley int 133494d1a210STim Haley dmu_write_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size, 133594d1a210STim Haley dmu_tx_t *tx) 133694d1a210STim Haley { 133794d1a210STim Haley dnode_t *dn; 133894d1a210STim Haley int err; 133994d1a210STim Haley 134094d1a210STim Haley if (size == 0) 134194d1a210STim Haley return (0); 134294d1a210STim Haley 134394d1a210STim Haley err = dnode_hold(os, object, FTAG, &dn); 134494d1a210STim Haley if (err) 134594d1a210STim Haley return (err); 134694d1a210STim Haley 134794d1a210STim Haley err = dmu_write_uio_dnode(dn, uio, size, tx); 134894d1a210STim Haley 134994d1a210STim Haley dnode_rele(dn, FTAG); 135094d1a210STim Haley 135194d1a210STim Haley return (err); 135294d1a210STim Haley } 135394d1a210STim Haley 135444eda4d7Smaybee int 135544eda4d7Smaybee dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 135644eda4d7Smaybee page_t *pp, dmu_tx_t *tx) 135744eda4d7Smaybee { 135844eda4d7Smaybee dmu_buf_t **dbp; 135944eda4d7Smaybee int numbufs, i; 136044eda4d7Smaybee int err; 136144eda4d7Smaybee 136244eda4d7Smaybee if (size == 0) 136344eda4d7Smaybee return (0); 136444eda4d7Smaybee 136544eda4d7Smaybee err = dmu_buf_hold_array(os, object, offset, size, 136644eda4d7Smaybee FALSE, FTAG, &numbufs, &dbp); 136744eda4d7Smaybee if (err) 136844eda4d7Smaybee return (err); 136944eda4d7Smaybee 137044eda4d7Smaybee for (i = 0; i < numbufs; i++) { 137144eda4d7Smaybee int tocpy, copied, thiscpy; 137244eda4d7Smaybee int bufoff; 137344eda4d7Smaybee dmu_buf_t *db = dbp[i]; 137444eda4d7Smaybee caddr_t va; 137544eda4d7Smaybee 137644eda4d7Smaybee ASSERT(size > 0); 137744eda4d7Smaybee ASSERT3U(db->db_size, >=, PAGESIZE); 137844eda4d7Smaybee 137944eda4d7Smaybee bufoff = offset - db->db_offset; 138044eda4d7Smaybee tocpy = (int)MIN(db->db_size - bufoff, size); 138144eda4d7Smaybee 138244eda4d7Smaybee ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); 138344eda4d7Smaybee 138444eda4d7Smaybee if (tocpy == db->db_size) 138544eda4d7Smaybee dmu_buf_will_fill(db, tx); 138644eda4d7Smaybee else 138744eda4d7Smaybee dmu_buf_will_dirty(db, tx); 138844eda4d7Smaybee 138944eda4d7Smaybee for (copied = 0; copied < tocpy; copied += PAGESIZE) { 139044eda4d7Smaybee ASSERT3U(pp->p_offset, ==, db->db_offset + bufoff); 139144eda4d7Smaybee thiscpy = MIN(PAGESIZE, tocpy - copied); 13920fab61baSJonathan W Adams va = zfs_map_page(pp, S_READ); 139344eda4d7Smaybee bcopy(va, (char *)db->db_data + bufoff, thiscpy); 13940fab61baSJonathan W Adams zfs_unmap_page(pp, va); 139544eda4d7Smaybee pp = pp->p_next; 139644eda4d7Smaybee bufoff += PAGESIZE; 139744eda4d7Smaybee } 139844eda4d7Smaybee 139944eda4d7Smaybee if (tocpy == db->db_size) 140044eda4d7Smaybee dmu_buf_fill_done(db, tx); 140144eda4d7Smaybee 140244eda4d7Smaybee offset += tocpy; 140344eda4d7Smaybee size -= tocpy; 140444eda4d7Smaybee } 140544eda4d7Smaybee dmu_buf_rele_array(dbp, numbufs, FTAG); 140644eda4d7Smaybee return (err); 140744eda4d7Smaybee } 1408fa9e4066Sahrens #endif 1409fa9e4066Sahrens 14102fdbea25SAleksandr Guzovskiy /* 14112fdbea25SAleksandr Guzovskiy * Allocate a loaned anonymous arc buffer. 14122fdbea25SAleksandr Guzovskiy */ 14132fdbea25SAleksandr Guzovskiy arc_buf_t * 14142fdbea25SAleksandr Guzovskiy dmu_request_arcbuf(dmu_buf_t *handle, int size) 14152fdbea25SAleksandr Guzovskiy { 1416744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)handle; 14172fdbea25SAleksandr Guzovskiy 14185602294fSDan Kimmel return (arc_loan_buf(db->db_objset->os_spa, B_FALSE, size)); 14192fdbea25SAleksandr Guzovskiy } 14202fdbea25SAleksandr Guzovskiy 14212fdbea25SAleksandr Guzovskiy /* 14222fdbea25SAleksandr Guzovskiy * Free a loaned arc buffer. 14232fdbea25SAleksandr Guzovskiy */ 14242fdbea25SAleksandr Guzovskiy void 14252fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(arc_buf_t *buf) 14262fdbea25SAleksandr Guzovskiy { 14272fdbea25SAleksandr Guzovskiy arc_return_buf(buf, FTAG); 1428dcbf3bd6SGeorge Wilson arc_buf_destroy(buf, FTAG); 14292fdbea25SAleksandr Guzovskiy } 14302fdbea25SAleksandr Guzovskiy 14312fdbea25SAleksandr Guzovskiy /* 14322fdbea25SAleksandr Guzovskiy * When possible directly assign passed loaned arc buffer to a dbuf. 14332fdbea25SAleksandr Guzovskiy * If this is not possible copy the contents of passed arc buf via 14342fdbea25SAleksandr Guzovskiy * dmu_write(). 14352fdbea25SAleksandr Guzovskiy */ 14362fdbea25SAleksandr Guzovskiy void 14372fdbea25SAleksandr Guzovskiy dmu_assign_arcbuf(dmu_buf_t *handle, uint64_t offset, arc_buf_t *buf, 14382fdbea25SAleksandr Guzovskiy dmu_tx_t *tx) 14392fdbea25SAleksandr Guzovskiy { 1440744947dcSTom Erickson dmu_buf_impl_t *dbuf = (dmu_buf_impl_t *)handle; 1441744947dcSTom Erickson dnode_t *dn; 14422fdbea25SAleksandr Guzovskiy dmu_buf_impl_t *db; 14435602294fSDan Kimmel uint32_t blksz = (uint32_t)arc_buf_lsize(buf); 14442fdbea25SAleksandr Guzovskiy uint64_t blkid; 14452fdbea25SAleksandr Guzovskiy 1446744947dcSTom Erickson DB_DNODE_ENTER(dbuf); 1447744947dcSTom Erickson dn = DB_DNODE(dbuf); 14482fdbea25SAleksandr Guzovskiy rw_enter(&dn->dn_struct_rwlock, RW_READER); 1449a2cdcdd2SPaul Dagnelie blkid = dbuf_whichblock(dn, 0, offset); 14502fdbea25SAleksandr Guzovskiy VERIFY((db = dbuf_hold(dn, blkid, FTAG)) != NULL); 14512fdbea25SAleksandr Guzovskiy rw_exit(&dn->dn_struct_rwlock); 1452744947dcSTom Erickson DB_DNODE_EXIT(dbuf); 14532fdbea25SAleksandr Guzovskiy 14548a904709SMatthew Ahrens /* 14558a904709SMatthew Ahrens * We can only assign if the offset is aligned, the arc buf is the 14565602294fSDan Kimmel * same size as the dbuf, and the dbuf is not metadata. 14578a904709SMatthew Ahrens */ 14585602294fSDan Kimmel if (offset == db->db.db_offset && blksz == db->db.db_size) { 14592fdbea25SAleksandr Guzovskiy dbuf_assign_arcbuf(db, buf, tx); 14602fdbea25SAleksandr Guzovskiy dbuf_rele(db, FTAG); 14612fdbea25SAleksandr Guzovskiy } else { 1462744947dcSTom Erickson objset_t *os; 1463744947dcSTom Erickson uint64_t object; 1464744947dcSTom Erickson 14655602294fSDan Kimmel /* compressed bufs must always be assignable to their dbuf */ 14665602294fSDan Kimmel ASSERT3U(arc_get_compression(buf), ==, ZIO_COMPRESS_OFF); 14675602294fSDan Kimmel ASSERT(!(buf->b_flags & ARC_BUF_FLAG_COMPRESSED)); 14685602294fSDan Kimmel 1469744947dcSTom Erickson DB_DNODE_ENTER(dbuf); 1470744947dcSTom Erickson dn = DB_DNODE(dbuf); 1471744947dcSTom Erickson os = dn->dn_objset; 1472744947dcSTom Erickson object = dn->dn_object; 1473744947dcSTom Erickson DB_DNODE_EXIT(dbuf); 1474744947dcSTom Erickson 14752fdbea25SAleksandr Guzovskiy dbuf_rele(db, FTAG); 1476744947dcSTom Erickson dmu_write(os, object, offset, blksz, buf->b_data, tx); 14772fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(buf); 1478c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIOSTAT_BUMP(xuiostat_wbuf_copied); 14792fdbea25SAleksandr Guzovskiy } 14802fdbea25SAleksandr Guzovskiy } 14812fdbea25SAleksandr Guzovskiy 1482c5c6ffa0Smaybee typedef struct { 1483b24ab676SJeff Bonwick dbuf_dirty_record_t *dsa_dr; 1484b24ab676SJeff Bonwick dmu_sync_cb_t *dsa_done; 1485b24ab676SJeff Bonwick zgd_t *dsa_zgd; 1486b24ab676SJeff Bonwick dmu_tx_t *dsa_tx; 1487c717a561Smaybee } dmu_sync_arg_t; 1488c5c6ffa0Smaybee 1489e14bb325SJeff Bonwick /* ARGSUSED */ 1490e14bb325SJeff Bonwick static void 1491e14bb325SJeff Bonwick dmu_sync_ready(zio_t *zio, arc_buf_t *buf, void *varg) 1492e14bb325SJeff Bonwick { 1493b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = varg; 1494b24ab676SJeff Bonwick dmu_buf_t *db = dsa->dsa_zgd->zgd_db; 1495e14bb325SJeff Bonwick blkptr_t *bp = zio->io_bp; 1496975c32a0SNeil Perrin 1497b24ab676SJeff Bonwick if (zio->io_error == 0) { 1498b24ab676SJeff Bonwick if (BP_IS_HOLE(bp)) { 1499b24ab676SJeff Bonwick /* 1500b24ab676SJeff Bonwick * A block of zeros may compress to a hole, but the 1501b24ab676SJeff Bonwick * block size still needs to be known for replay. 1502b24ab676SJeff Bonwick */ 1503b24ab676SJeff Bonwick BP_SET_LSIZE(bp, db->db_size); 15045d7b4d43SMatthew Ahrens } else if (!BP_IS_EMBEDDED(bp)) { 1505b24ab676SJeff Bonwick ASSERT(BP_GET_LEVEL(bp) == 0); 1506b24ab676SJeff Bonwick bp->blk_fill = 1; 1507b24ab676SJeff Bonwick } 1508e14bb325SJeff Bonwick } 1509e14bb325SJeff Bonwick } 1510e14bb325SJeff Bonwick 1511b24ab676SJeff Bonwick static void 1512b24ab676SJeff Bonwick dmu_sync_late_arrival_ready(zio_t *zio) 1513b24ab676SJeff Bonwick { 1514b24ab676SJeff Bonwick dmu_sync_ready(zio, NULL, zio->io_private); 1515b24ab676SJeff Bonwick } 1516b24ab676SJeff Bonwick 1517c5c6ffa0Smaybee /* ARGSUSED */ 1518c5c6ffa0Smaybee static void 1519c5c6ffa0Smaybee dmu_sync_done(zio_t *zio, arc_buf_t *buf, void *varg) 1520c5c6ffa0Smaybee { 1521b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = varg; 1522b24ab676SJeff Bonwick dbuf_dirty_record_t *dr = dsa->dsa_dr; 1523c717a561Smaybee dmu_buf_impl_t *db = dr->dr_dbuf; 1524c5c6ffa0Smaybee 1525b50a0fe0SNeil Perrin mutex_enter(&db->db_mtx); 1526b50a0fe0SNeil Perrin ASSERT(dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC); 1527b24ab676SJeff Bonwick if (zio->io_error == 0) { 152880901aeaSGeorge Wilson dr->dt.dl.dr_nopwrite = !!(zio->io_flags & ZIO_FLAG_NOPWRITE); 152980901aeaSGeorge Wilson if (dr->dt.dl.dr_nopwrite) { 153080901aeaSGeorge Wilson blkptr_t *bp = zio->io_bp; 153180901aeaSGeorge Wilson blkptr_t *bp_orig = &zio->io_bp_orig; 153280901aeaSGeorge Wilson uint8_t chksum = BP_GET_CHECKSUM(bp_orig); 153380901aeaSGeorge Wilson 153480901aeaSGeorge Wilson ASSERT(BP_EQUAL(bp, bp_orig)); 153580901aeaSGeorge Wilson ASSERT(zio->io_prop.zp_compress != ZIO_COMPRESS_OFF); 153645818ee1SMatthew Ahrens ASSERT(zio_checksum_table[chksum].ci_flags & 153745818ee1SMatthew Ahrens ZCHECKSUM_FLAG_NOPWRITE); 153880901aeaSGeorge Wilson } 1539b24ab676SJeff Bonwick dr->dt.dl.dr_overridden_by = *zio->io_bp; 1540b24ab676SJeff Bonwick dr->dt.dl.dr_override_state = DR_OVERRIDDEN; 1541b24ab676SJeff Bonwick dr->dt.dl.dr_copies = zio->io_prop.zp_copies; 154270163ac5SPrakash Surya 154370163ac5SPrakash Surya /* 154470163ac5SPrakash Surya * Old style holes are filled with all zeros, whereas 154570163ac5SPrakash Surya * new-style holes maintain their lsize, type, level, 154670163ac5SPrakash Surya * and birth time (see zio_write_compress). While we 154770163ac5SPrakash Surya * need to reset the BP_SET_LSIZE() call that happened 154870163ac5SPrakash Surya * in dmu_sync_ready for old style holes, we do *not* 154970163ac5SPrakash Surya * want to wipe out the information contained in new 155070163ac5SPrakash Surya * style holes. Thus, only zero out the block pointer if 155170163ac5SPrakash Surya * it's an old style hole. 155270163ac5SPrakash Surya */ 155370163ac5SPrakash Surya if (BP_IS_HOLE(&dr->dt.dl.dr_overridden_by) && 155470163ac5SPrakash Surya dr->dt.dl.dr_overridden_by.blk_birth == 0) 1555b24ab676SJeff Bonwick BP_ZERO(&dr->dt.dl.dr_overridden_by); 1556b24ab676SJeff Bonwick } else { 1557b24ab676SJeff Bonwick dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN; 1558b24ab676SJeff Bonwick } 1559c5c6ffa0Smaybee cv_broadcast(&db->db_changed); 1560b50a0fe0SNeil Perrin mutex_exit(&db->db_mtx); 1561b50a0fe0SNeil Perrin 1562b24ab676SJeff Bonwick dsa->dsa_done(dsa->dsa_zgd, zio->io_error); 1563b24ab676SJeff Bonwick 1564b24ab676SJeff Bonwick kmem_free(dsa, sizeof (*dsa)); 1565b24ab676SJeff Bonwick } 1566b24ab676SJeff Bonwick 1567b24ab676SJeff Bonwick static void 1568b24ab676SJeff Bonwick dmu_sync_late_arrival_done(zio_t *zio) 1569b24ab676SJeff Bonwick { 1570b24ab676SJeff Bonwick blkptr_t *bp = zio->io_bp; 1571b24ab676SJeff Bonwick dmu_sync_arg_t *dsa = zio->io_private; 157280901aeaSGeorge Wilson blkptr_t *bp_orig = &zio->io_bp_orig; 1573b24ab676SJeff Bonwick 1574b24ab676SJeff Bonwick if (zio->io_error == 0 && !BP_IS_HOLE(bp)) { 157580901aeaSGeorge Wilson /* 157680901aeaSGeorge Wilson * If we didn't allocate a new block (i.e. ZIO_FLAG_NOPWRITE) 157780901aeaSGeorge Wilson * then there is nothing to do here. Otherwise, free the 157880901aeaSGeorge Wilson * newly allocated block in this txg. 157980901aeaSGeorge Wilson */ 158080901aeaSGeorge Wilson if (zio->io_flags & ZIO_FLAG_NOPWRITE) { 158180901aeaSGeorge Wilson ASSERT(BP_EQUAL(bp, bp_orig)); 158280901aeaSGeorge Wilson } else { 158380901aeaSGeorge Wilson ASSERT(BP_IS_HOLE(bp_orig) || !BP_EQUAL(bp, bp_orig)); 158480901aeaSGeorge Wilson ASSERT(zio->io_bp->blk_birth == zio->io_txg); 158580901aeaSGeorge Wilson ASSERT(zio->io_txg > spa_syncing_txg(zio->io_spa)); 158680901aeaSGeorge Wilson zio_free(zio->io_spa, zio->io_txg, zio->io_bp); 158780901aeaSGeorge Wilson } 1588b24ab676SJeff Bonwick } 1589b24ab676SJeff Bonwick 1590b24ab676SJeff Bonwick dmu_tx_commit(dsa->dsa_tx); 1591b24ab676SJeff Bonwick 1592b24ab676SJeff Bonwick dsa->dsa_done(dsa->dsa_zgd, zio->io_error); 1593b24ab676SJeff Bonwick 1594b24ab676SJeff Bonwick kmem_free(dsa, sizeof (*dsa)); 1595b24ab676SJeff Bonwick } 1596b24ab676SJeff Bonwick 1597b24ab676SJeff Bonwick static int 1598b24ab676SJeff Bonwick dmu_sync_late_arrival(zio_t *pio, objset_t *os, dmu_sync_cb_t *done, zgd_t *zgd, 15997802d7bfSMatthew Ahrens zio_prop_t *zp, zbookmark_phys_t *zb) 1600b24ab676SJeff Bonwick { 1601b24ab676SJeff Bonwick dmu_sync_arg_t *dsa; 1602b24ab676SJeff Bonwick dmu_tx_t *tx; 1603b24ab676SJeff Bonwick 1604b24ab676SJeff Bonwick tx = dmu_tx_create(os); 1605b24ab676SJeff Bonwick dmu_tx_hold_space(tx, zgd->zgd_db->db_size); 16066e1f5caaSNeil Perrin if (dmu_tx_assign(tx, TXG_WAIT) != 0) { 1607b24ab676SJeff Bonwick dmu_tx_abort(tx); 1608be6fd75aSMatthew Ahrens /* Make zl_get_data do txg_waited_synced() */ 1609be6fd75aSMatthew Ahrens return (SET_ERROR(EIO)); 1610b24ab676SJeff Bonwick } 1611b24ab676SJeff Bonwick 1612b24ab676SJeff Bonwick dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); 1613b24ab676SJeff Bonwick dsa->dsa_dr = NULL; 1614b24ab676SJeff Bonwick dsa->dsa_done = done; 1615b24ab676SJeff Bonwick dsa->dsa_zgd = zgd; 1616b24ab676SJeff Bonwick dsa->dsa_tx = tx; 1617c717a561Smaybee 16185602294fSDan Kimmel zio_nowait(zio_write(pio, os->os_spa, dmu_tx_get_txg(tx), zgd->zgd_bp, 16195602294fSDan Kimmel zgd->zgd_db->db_data, zgd->zgd_db->db_size, zgd->zgd_db->db_size, 16208df0bcf0SPaul Dagnelie zp, dmu_sync_late_arrival_ready, NULL, 16218df0bcf0SPaul Dagnelie NULL, dmu_sync_late_arrival_done, dsa, ZIO_PRIORITY_SYNC_WRITE, 16228df0bcf0SPaul Dagnelie ZIO_FLAG_CANFAIL, zb)); 1623b24ab676SJeff Bonwick 1624b24ab676SJeff Bonwick return (0); 1625c5c6ffa0Smaybee } 1626c5c6ffa0Smaybee 1627fa9e4066Sahrens /* 1628c5c6ffa0Smaybee * Intent log support: sync the block associated with db to disk. 1629c5c6ffa0Smaybee * N.B. and XXX: the caller is responsible for making sure that the 1630c5c6ffa0Smaybee * data isn't changing while dmu_sync() is writing it. 1631fa9e4066Sahrens * 1632fa9e4066Sahrens * Return values: 1633fa9e4066Sahrens * 163480901aeaSGeorge Wilson * EEXIST: this txg has already been synced, so there's nothing to do. 1635fa9e4066Sahrens * The caller should not log the write. 1636fa9e4066Sahrens * 1637fa9e4066Sahrens * ENOENT: the block was dbuf_free_range()'d, so there's nothing to do. 1638fa9e4066Sahrens * The caller should not log the write. 1639fa9e4066Sahrens * 1640c5c6ffa0Smaybee * EALREADY: this block is already in the process of being synced. 1641c5c6ffa0Smaybee * The caller should track its progress (somehow). 1642fa9e4066Sahrens * 1643b24ab676SJeff Bonwick * EIO: could not do the I/O. 1644b24ab676SJeff Bonwick * The caller should do a txg_wait_synced(). 1645fa9e4066Sahrens * 1646b24ab676SJeff Bonwick * 0: the I/O has been initiated. 1647b24ab676SJeff Bonwick * The caller should log this blkptr in the done callback. 1648b24ab676SJeff Bonwick * It is possible that the I/O will fail, in which case 1649b24ab676SJeff Bonwick * the error will be reported to the done callback and 1650b24ab676SJeff Bonwick * propagated to pio from zio_done(). 1651fa9e4066Sahrens */ 1652fa9e4066Sahrens int 1653b24ab676SJeff Bonwick dmu_sync(zio_t *pio, uint64_t txg, dmu_sync_cb_t *done, zgd_t *zgd) 1654fa9e4066Sahrens { 1655b24ab676SJeff Bonwick blkptr_t *bp = zgd->zgd_bp; 1656b24ab676SJeff Bonwick dmu_buf_impl_t *db = (dmu_buf_impl_t *)zgd->zgd_db; 1657503ad85cSMatthew Ahrens objset_t *os = db->db_objset; 1658b24ab676SJeff Bonwick dsl_dataset_t *ds = os->os_dsl_dataset; 1659c717a561Smaybee dbuf_dirty_record_t *dr; 1660b24ab676SJeff Bonwick dmu_sync_arg_t *dsa; 16617802d7bfSMatthew Ahrens zbookmark_phys_t zb; 1662b24ab676SJeff Bonwick zio_prop_t zp; 1663744947dcSTom Erickson dnode_t *dn; 1664fa9e4066Sahrens 1665b24ab676SJeff Bonwick ASSERT(pio != NULL); 1666fa9e4066Sahrens ASSERT(txg != 0); 1667fa9e4066Sahrens 1668b24ab676SJeff Bonwick SET_BOOKMARK(&zb, ds->ds_object, 1669b24ab676SJeff Bonwick db->db.db_object, db->db_level, db->db_blkid); 1670b24ab676SJeff Bonwick 1671744947dcSTom Erickson DB_DNODE_ENTER(db); 1672744947dcSTom Erickson dn = DB_DNODE(db); 16735602294fSDan Kimmel dmu_write_policy(os, dn, db->db_level, WP_DMU_SYNC, 16745602294fSDan Kimmel ZIO_COMPRESS_INHERIT, &zp); 1675744947dcSTom Erickson DB_DNODE_EXIT(db); 1676fa9e4066Sahrens 1677ea8dc4b6Seschrock /* 1678b24ab676SJeff Bonwick * If we're frozen (running ziltest), we always need to generate a bp. 1679ea8dc4b6Seschrock */ 1680b24ab676SJeff Bonwick if (txg > spa_freeze_txg(os->os_spa)) 1681b24ab676SJeff Bonwick return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); 1682ea8dc4b6Seschrock 1683fa9e4066Sahrens /* 1684b24ab676SJeff Bonwick * Grabbing db_mtx now provides a barrier between dbuf_sync_leaf() 1685b24ab676SJeff Bonwick * and us. If we determine that this txg is not yet syncing, 1686b24ab676SJeff Bonwick * but it begins to sync a moment later, that's OK because the 1687b24ab676SJeff Bonwick * sync thread will block in dbuf_sync_leaf() until we drop db_mtx. 1688fa9e4066Sahrens */ 1689b24ab676SJeff Bonwick mutex_enter(&db->db_mtx); 1690b24ab676SJeff Bonwick 1691b24ab676SJeff Bonwick if (txg <= spa_last_synced_txg(os->os_spa)) { 1692fa9e4066Sahrens /* 1693b24ab676SJeff Bonwick * This txg has already synced. There's nothing to do. 1694fa9e4066Sahrens */ 1695b24ab676SJeff Bonwick mutex_exit(&db->db_mtx); 1696be6fd75aSMatthew Ahrens return (SET_ERROR(EEXIST)); 1697fa9e4066Sahrens } 1698fa9e4066Sahrens 1699b24ab676SJeff Bonwick if (txg <= spa_syncing_txg(os->os_spa)) { 1700b24ab676SJeff Bonwick /* 1701b24ab676SJeff Bonwick * This txg is currently syncing, so we can't mess with 1702b24ab676SJeff Bonwick * the dirty record anymore; just write a new log block. 1703b24ab676SJeff Bonwick */ 1704b24ab676SJeff Bonwick mutex_exit(&db->db_mtx); 1705b24ab676SJeff Bonwick return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); 1706fa9e4066Sahrens } 1707fa9e4066Sahrens 1708c717a561Smaybee dr = db->db_last_dirty; 1709b24ab676SJeff Bonwick while (dr && dr->dr_txg != txg) 1710c717a561Smaybee dr = dr->dr_next; 1711b24ab676SJeff Bonwick 1712b24ab676SJeff Bonwick if (dr == NULL) { 1713c5c6ffa0Smaybee /* 1714b24ab676SJeff Bonwick * There's no dr for this dbuf, so it must have been freed. 1715c5c6ffa0Smaybee * There's no need to log writes to freed blocks, so we're done. 1716c5c6ffa0Smaybee */ 1717c5c6ffa0Smaybee mutex_exit(&db->db_mtx); 1718be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 1719c5c6ffa0Smaybee } 1720c5c6ffa0Smaybee 172180901aeaSGeorge Wilson ASSERT(dr->dr_next == NULL || dr->dr_next->dr_txg < txg); 172280901aeaSGeorge Wilson 172380901aeaSGeorge Wilson /* 172434e8acefSMatthew Ahrens * Assume the on-disk data is X, the current syncing data (in 172534e8acefSMatthew Ahrens * txg - 1) is Y, and the current in-memory data is Z (currently 172634e8acefSMatthew Ahrens * in dmu_sync). 172734e8acefSMatthew Ahrens * 172834e8acefSMatthew Ahrens * We usually want to perform a nopwrite if X and Z are the 172934e8acefSMatthew Ahrens * same. However, if Y is different (i.e. the BP is going to 173034e8acefSMatthew Ahrens * change before this write takes effect), then a nopwrite will 173134e8acefSMatthew Ahrens * be incorrect - we would override with X, which could have 173234e8acefSMatthew Ahrens * been freed when Y was written. 173334e8acefSMatthew Ahrens * 173434e8acefSMatthew Ahrens * (Note that this is not a concern when we are nop-writing from 173534e8acefSMatthew Ahrens * syncing context, because X and Y must be identical, because 173634e8acefSMatthew Ahrens * all previous txgs have been synced.) 173734e8acefSMatthew Ahrens * 173834e8acefSMatthew Ahrens * Therefore, we disable nopwrite if the current BP could change 173934e8acefSMatthew Ahrens * before this TXG. There are two ways it could change: by 174034e8acefSMatthew Ahrens * being dirty (dr_next is non-NULL), or by being freed 174134e8acefSMatthew Ahrens * (dnode_block_freed()). This behavior is verified by 174234e8acefSMatthew Ahrens * zio_done(), which VERIFYs that the override BP is identical 174334e8acefSMatthew Ahrens * to the on-disk BP. 174480901aeaSGeorge Wilson */ 174534e8acefSMatthew Ahrens DB_DNODE_ENTER(db); 174634e8acefSMatthew Ahrens dn = DB_DNODE(db); 174734e8acefSMatthew Ahrens if (dr->dr_next != NULL || dnode_block_freed(dn, db->db_blkid)) 174880901aeaSGeorge Wilson zp.zp_nopwrite = B_FALSE; 174934e8acefSMatthew Ahrens DB_DNODE_EXIT(db); 175080901aeaSGeorge Wilson 1751c717a561Smaybee ASSERT(dr->dr_txg == txg); 1752b24ab676SJeff Bonwick if (dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC || 1753b24ab676SJeff Bonwick dr->dt.dl.dr_override_state == DR_OVERRIDDEN) { 1754c717a561Smaybee /* 1755b24ab676SJeff Bonwick * We have already issued a sync write for this buffer, 1756b24ab676SJeff Bonwick * or this buffer has already been synced. It could not 1757c717a561Smaybee * have been dirtied since, or we would have cleared the state. 1758c717a561Smaybee */ 1759c717a561Smaybee mutex_exit(&db->db_mtx); 1760be6fd75aSMatthew Ahrens return (SET_ERROR(EALREADY)); 1761c717a561Smaybee } 1762c717a561Smaybee 1763b24ab676SJeff Bonwick ASSERT(dr->dt.dl.dr_override_state == DR_NOT_OVERRIDDEN); 1764c717a561Smaybee dr->dt.dl.dr_override_state = DR_IN_DMU_SYNC; 1765fa9e4066Sahrens mutex_exit(&db->db_mtx); 1766e14bb325SJeff Bonwick 1767b24ab676SJeff Bonwick dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); 1768b24ab676SJeff Bonwick dsa->dsa_dr = dr; 1769b24ab676SJeff Bonwick dsa->dsa_done = done; 1770b24ab676SJeff Bonwick dsa->dsa_zgd = zgd; 1771b24ab676SJeff Bonwick dsa->dsa_tx = NULL; 1772e14bb325SJeff Bonwick 1773b24ab676SJeff Bonwick zio_nowait(arc_write(pio, os->os_spa, txg, 1774aad02571SSaso Kiselkov bp, dr->dt.dl.dr_data, DBUF_IS_L2CACHEABLE(db), 1775dcbf3bd6SGeorge Wilson &zp, dmu_sync_ready, NULL, NULL, dmu_sync_done, dsa, 17768df0bcf0SPaul Dagnelie ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, &zb)); 1777e14bb325SJeff Bonwick 1778b24ab676SJeff Bonwick return (0); 1779fa9e4066Sahrens } 1780fa9e4066Sahrens 1781fa9e4066Sahrens int 1782fa9e4066Sahrens dmu_object_set_blocksize(objset_t *os, uint64_t object, uint64_t size, int ibs, 17839a686fbcSPaul Dagnelie dmu_tx_t *tx) 1784fa9e4066Sahrens { 1785ea8dc4b6Seschrock dnode_t *dn; 1786ea8dc4b6Seschrock int err; 1787ea8dc4b6Seschrock 1788503ad85cSMatthew Ahrens err = dnode_hold(os, object, FTAG, &dn); 1789ea8dc4b6Seschrock if (err) 1790ea8dc4b6Seschrock return (err); 1791ea8dc4b6Seschrock err = dnode_set_blksz(dn, size, ibs, tx); 1792fa9e4066Sahrens dnode_rele(dn, FTAG); 1793fa9e4066Sahrens return (err); 1794fa9e4066Sahrens } 1795fa9e4066Sahrens 1796fa9e4066Sahrens void 1797fa9e4066Sahrens dmu_object_set_checksum(objset_t *os, uint64_t object, uint8_t checksum, 17989a686fbcSPaul Dagnelie dmu_tx_t *tx) 1799fa9e4066Sahrens { 1800ea8dc4b6Seschrock dnode_t *dn; 1801ea8dc4b6Seschrock 18025d7b4d43SMatthew Ahrens /* 18035d7b4d43SMatthew Ahrens * Send streams include each object's checksum function. This 18045d7b4d43SMatthew Ahrens * check ensures that the receiving system can understand the 18055d7b4d43SMatthew Ahrens * checksum function transmitted. 18065d7b4d43SMatthew Ahrens */ 18075d7b4d43SMatthew Ahrens ASSERT3U(checksum, <, ZIO_CHECKSUM_LEGACY_FUNCTIONS); 18085d7b4d43SMatthew Ahrens 18095d7b4d43SMatthew Ahrens VERIFY0(dnode_hold(os, object, FTAG, &dn)); 18105d7b4d43SMatthew Ahrens ASSERT3U(checksum, <, ZIO_CHECKSUM_FUNCTIONS); 1811fa9e4066Sahrens dn->dn_checksum = checksum; 1812fa9e4066Sahrens dnode_setdirty(dn, tx); 1813fa9e4066Sahrens dnode_rele(dn, FTAG); 1814fa9e4066Sahrens } 1815fa9e4066Sahrens 1816fa9e4066Sahrens void 1817fa9e4066Sahrens dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress, 18189a686fbcSPaul Dagnelie dmu_tx_t *tx) 1819fa9e4066Sahrens { 1820ea8dc4b6Seschrock dnode_t *dn; 1821ea8dc4b6Seschrock 18225d7b4d43SMatthew Ahrens /* 18235d7b4d43SMatthew Ahrens * Send streams include each object's compression function. This 18245d7b4d43SMatthew Ahrens * check ensures that the receiving system can understand the 18255d7b4d43SMatthew Ahrens * compression function transmitted. 18265d7b4d43SMatthew Ahrens */ 18275d7b4d43SMatthew Ahrens ASSERT3U(compress, <, ZIO_COMPRESS_LEGACY_FUNCTIONS); 18285d7b4d43SMatthew Ahrens 18295d7b4d43SMatthew Ahrens VERIFY0(dnode_hold(os, object, FTAG, &dn)); 1830fa9e4066Sahrens dn->dn_compress = compress; 1831fa9e4066Sahrens dnode_setdirty(dn, tx); 1832fa9e4066Sahrens dnode_rele(dn, FTAG); 1833fa9e4066Sahrens } 1834fa9e4066Sahrens 1835b24ab676SJeff Bonwick int zfs_mdcomp_disable = 0; 1836b24ab676SJeff Bonwick 1837edf345e6SMatthew Ahrens /* 1838edf345e6SMatthew Ahrens * When the "redundant_metadata" property is set to "most", only indirect 1839edf345e6SMatthew Ahrens * blocks of this level and higher will have an additional ditto block. 1840edf345e6SMatthew Ahrens */ 1841edf345e6SMatthew Ahrens int zfs_redundant_metadata_most_ditto_level = 2; 1842edf345e6SMatthew Ahrens 1843b24ab676SJeff Bonwick void 18445602294fSDan Kimmel dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp, 18455602294fSDan Kimmel enum zio_compress override_compress, zio_prop_t *zp) 1846b24ab676SJeff Bonwick { 1847b24ab676SJeff Bonwick dmu_object_type_t type = dn ? dn->dn_type : DMU_OT_OBJSET; 1848ad135b5dSChristopher Siden boolean_t ismd = (level > 0 || DMU_OT_IS_METADATA(type) || 18491d8ccc7bSMark Shellenbaum (wp & WP_SPILL)); 1850b24ab676SJeff Bonwick enum zio_checksum checksum = os->os_checksum; 1851b24ab676SJeff Bonwick enum zio_compress compress = os->os_compress; 1852b24ab676SJeff Bonwick enum zio_checksum dedup_checksum = os->os_dedup_checksum; 18537540df39SGeorge Wilson boolean_t dedup = B_FALSE; 18547540df39SGeorge Wilson boolean_t nopwrite = B_FALSE; 1855b24ab676SJeff Bonwick boolean_t dedup_verify = os->os_dedup_verify; 1856b24ab676SJeff Bonwick int copies = os->os_copies; 18575602294fSDan Kimmel boolean_t lz4_ac = spa_feature_is_active(os->os_spa, 18585602294fSDan Kimmel SPA_FEATURE_LZ4_COMPRESS); 18595602294fSDan Kimmel 18605602294fSDan Kimmel IMPLY(override_compress == ZIO_COMPRESS_LZ4, lz4_ac); 1861b24ab676SJeff Bonwick 1862b24ab676SJeff Bonwick /* 186380901aeaSGeorge Wilson * We maintain different write policies for each of the following 186480901aeaSGeorge Wilson * types of data: 186580901aeaSGeorge Wilson * 1. metadata 186680901aeaSGeorge Wilson * 2. preallocated blocks (i.e. level-0 blocks of a dump device) 186780901aeaSGeorge Wilson * 3. all other level 0 blocks 1868b24ab676SJeff Bonwick */ 1869b24ab676SJeff Bonwick if (ismd) { 1870b8289d24SDaniil Lunev if (zfs_mdcomp_disable) { 1871b8289d24SDaniil Lunev compress = ZIO_COMPRESS_EMPTY; 1872b8289d24SDaniil Lunev } else { 1873db1741f5SJustin T. Gibbs /* 1874db1741f5SJustin T. Gibbs * XXX -- we should design a compression algorithm 1875db1741f5SJustin T. Gibbs * that specializes in arrays of bps. 1876db1741f5SJustin T. Gibbs */ 1877db1741f5SJustin T. Gibbs compress = zio_compress_select(os->os_spa, 1878db1741f5SJustin T. Gibbs ZIO_COMPRESS_ON, ZIO_COMPRESS_ON); 1879b8289d24SDaniil Lunev } 188080901aeaSGeorge Wilson 1881b24ab676SJeff Bonwick /* 1882b24ab676SJeff Bonwick * Metadata always gets checksummed. If the data 1883b24ab676SJeff Bonwick * checksum is multi-bit correctable, and it's not a 1884b24ab676SJeff Bonwick * ZBT-style checksum, then it's suitable for metadata 1885b24ab676SJeff Bonwick * as well. Otherwise, the metadata checksum defaults 1886b24ab676SJeff Bonwick * to fletcher4. 1887b24ab676SJeff Bonwick */ 188845818ee1SMatthew Ahrens if (!(zio_checksum_table[checksum].ci_flags & 188945818ee1SMatthew Ahrens ZCHECKSUM_FLAG_METADATA) || 189045818ee1SMatthew Ahrens (zio_checksum_table[checksum].ci_flags & 189145818ee1SMatthew Ahrens ZCHECKSUM_FLAG_EMBEDDED)) 1892b24ab676SJeff Bonwick checksum = ZIO_CHECKSUM_FLETCHER_4; 1893edf345e6SMatthew Ahrens 1894edf345e6SMatthew Ahrens if (os->os_redundant_metadata == ZFS_REDUNDANT_METADATA_ALL || 1895edf345e6SMatthew Ahrens (os->os_redundant_metadata == 1896edf345e6SMatthew Ahrens ZFS_REDUNDANT_METADATA_MOST && 1897edf345e6SMatthew Ahrens (level >= zfs_redundant_metadata_most_ditto_level || 1898edf345e6SMatthew Ahrens DMU_OT_IS_METADATA(type) || (wp & WP_SPILL)))) 1899edf345e6SMatthew Ahrens copies++; 190080901aeaSGeorge Wilson } else if (wp & WP_NOFILL) { 190180901aeaSGeorge Wilson ASSERT(level == 0); 190280901aeaSGeorge Wilson 1903b24ab676SJeff Bonwick /* 190480901aeaSGeorge Wilson * If we're writing preallocated blocks, we aren't actually 190580901aeaSGeorge Wilson * writing them so don't set any policy properties. These 190680901aeaSGeorge Wilson * blocks are currently only used by an external subsystem 190780901aeaSGeorge Wilson * outside of zfs (i.e. dump) and not written by the zio 190880901aeaSGeorge Wilson * pipeline. 1909b24ab676SJeff Bonwick */ 191080901aeaSGeorge Wilson compress = ZIO_COMPRESS_OFF; 1911810e43b2SBill Pijewski checksum = ZIO_CHECKSUM_NOPARITY; 1912b24ab676SJeff Bonwick } else { 1913db1741f5SJustin T. Gibbs compress = zio_compress_select(os->os_spa, dn->dn_compress, 1914db1741f5SJustin T. Gibbs compress); 1915b24ab676SJeff Bonwick 191680901aeaSGeorge Wilson checksum = (dedup_checksum == ZIO_CHECKSUM_OFF) ? 191780901aeaSGeorge Wilson zio_checksum_select(dn->dn_checksum, checksum) : 191880901aeaSGeorge Wilson dedup_checksum; 1919b24ab676SJeff Bonwick 192080901aeaSGeorge Wilson /* 192180901aeaSGeorge Wilson * Determine dedup setting. If we are in dmu_sync(), 192280901aeaSGeorge Wilson * we won't actually dedup now because that's all 192380901aeaSGeorge Wilson * done in syncing context; but we do want to use the 192480901aeaSGeorge Wilson * dedup checkum. If the checksum is not strong 192580901aeaSGeorge Wilson * enough to ensure unique signatures, force 192680901aeaSGeorge Wilson * dedup_verify. 192780901aeaSGeorge Wilson */ 192880901aeaSGeorge Wilson if (dedup_checksum != ZIO_CHECKSUM_OFF) { 192980901aeaSGeorge Wilson dedup = (wp & WP_DMU_SYNC) ? B_FALSE : B_TRUE; 193045818ee1SMatthew Ahrens if (!(zio_checksum_table[checksum].ci_flags & 193145818ee1SMatthew Ahrens ZCHECKSUM_FLAG_DEDUP)) 193280901aeaSGeorge Wilson dedup_verify = B_TRUE; 193380901aeaSGeorge Wilson } 1934b24ab676SJeff Bonwick 193580901aeaSGeorge Wilson /* 193645818ee1SMatthew Ahrens * Enable nopwrite if we have secure enough checksum 193745818ee1SMatthew Ahrens * algorithm (see comment in zio_nop_write) and 193845818ee1SMatthew Ahrens * compression is enabled. We don't enable nopwrite if 193945818ee1SMatthew Ahrens * dedup is enabled as the two features are mutually 194045818ee1SMatthew Ahrens * exclusive. 194180901aeaSGeorge Wilson */ 194245818ee1SMatthew Ahrens nopwrite = (!dedup && (zio_checksum_table[checksum].ci_flags & 194345818ee1SMatthew Ahrens ZCHECKSUM_FLAG_NOPWRITE) && 194480901aeaSGeorge Wilson compress != ZIO_COMPRESS_OFF && zfs_nopwrite_enabled); 1945b24ab676SJeff Bonwick } 1946b24ab676SJeff Bonwick 1947b24ab676SJeff Bonwick zp->zp_checksum = checksum; 19485602294fSDan Kimmel 19495602294fSDan Kimmel /* 19505602294fSDan Kimmel * If we're writing a pre-compressed buffer, the compression type we use 19515602294fSDan Kimmel * must match the data. If it hasn't been compressed yet, then we should 19525602294fSDan Kimmel * use the value dictated by the policies above. 19535602294fSDan Kimmel */ 19545602294fSDan Kimmel zp->zp_compress = override_compress != ZIO_COMPRESS_INHERIT 19555602294fSDan Kimmel ? override_compress : compress; 19565602294fSDan Kimmel ASSERT3U(zp->zp_compress, !=, ZIO_COMPRESS_INHERIT); 19575602294fSDan Kimmel 19580a586ceaSMark Shellenbaum zp->zp_type = (wp & WP_SPILL) ? dn->dn_bonustype : type; 1959b24ab676SJeff Bonwick zp->zp_level = level; 1960edf345e6SMatthew Ahrens zp->zp_copies = MIN(copies, spa_max_replication(os->os_spa)); 1961b24ab676SJeff Bonwick zp->zp_dedup = dedup; 1962b24ab676SJeff Bonwick zp->zp_dedup_verify = dedup && dedup_verify; 196380901aeaSGeorge Wilson zp->zp_nopwrite = nopwrite; 1964b24ab676SJeff Bonwick } 1965b24ab676SJeff Bonwick 1966fa9e4066Sahrens int 1967fa9e4066Sahrens dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole, uint64_t *off) 1968fa9e4066Sahrens { 1969fa9e4066Sahrens dnode_t *dn; 19702bcf0248SMax Grossman int err; 1971fa9e4066Sahrens 1972fa9e4066Sahrens /* 1973fa9e4066Sahrens * Sync any current changes before 1974fa9e4066Sahrens * we go trundling through the block pointers. 1975fa9e4066Sahrens */ 19762bcf0248SMax Grossman err = dmu_object_wait_synced(os, object); 19772bcf0248SMax Grossman if (err) { 19782bcf0248SMax Grossman return (err); 1979fa9e4066Sahrens } 19802bcf0248SMax Grossman 19812bcf0248SMax Grossman err = dnode_hold(os, object, FTAG, &dn); 19822bcf0248SMax Grossman if (err) { 19832bcf0248SMax Grossman return (err); 1984fa9e4066Sahrens } 1985fa9e4066Sahrens 1986cdb0ab79Smaybee err = dnode_next_offset(dn, (hole ? DNODE_FIND_HOLE : 0), off, 1, 1, 0); 1987fa9e4066Sahrens dnode_rele(dn, FTAG); 1988fa9e4066Sahrens 1989fa9e4066Sahrens return (err); 1990fa9e4066Sahrens } 1991fa9e4066Sahrens 19922bcf0248SMax Grossman /* 19932bcf0248SMax Grossman * Given the ZFS object, if it contains any dirty nodes 19942bcf0248SMax Grossman * this function flushes all dirty blocks to disk. This 19952bcf0248SMax Grossman * ensures the DMU object info is updated. A more efficient 19962bcf0248SMax Grossman * future version might just find the TXG with the maximum 19972bcf0248SMax Grossman * ID and wait for that to be synced. 19982bcf0248SMax Grossman */ 19992bcf0248SMax Grossman int 20009a686fbcSPaul Dagnelie dmu_object_wait_synced(objset_t *os, uint64_t object) 20019a686fbcSPaul Dagnelie { 20022bcf0248SMax Grossman dnode_t *dn; 20032bcf0248SMax Grossman int error, i; 20042bcf0248SMax Grossman 20052bcf0248SMax Grossman error = dnode_hold(os, object, FTAG, &dn); 20062bcf0248SMax Grossman if (error) { 20072bcf0248SMax Grossman return (error); 20082bcf0248SMax Grossman } 20092bcf0248SMax Grossman 20102bcf0248SMax Grossman for (i = 0; i < TXG_SIZE; i++) { 20112bcf0248SMax Grossman if (list_link_active(&dn->dn_dirty_link[i])) { 20122bcf0248SMax Grossman break; 20132bcf0248SMax Grossman } 20142bcf0248SMax Grossman } 20152bcf0248SMax Grossman dnode_rele(dn, FTAG); 20162bcf0248SMax Grossman if (i != TXG_SIZE) { 20172bcf0248SMax Grossman txg_wait_synced(dmu_objset_pool(os), 0); 20182bcf0248SMax Grossman } 20192bcf0248SMax Grossman 20202bcf0248SMax Grossman return (0); 20212bcf0248SMax Grossman } 20222bcf0248SMax Grossman 2023fa9e4066Sahrens void 2024fa9e4066Sahrens dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi) 2025fa9e4066Sahrens { 2026b24ab676SJeff Bonwick dnode_phys_t *dnp; 2027b24ab676SJeff Bonwick 2028fa9e4066Sahrens rw_enter(&dn->dn_struct_rwlock, RW_READER); 2029fa9e4066Sahrens mutex_enter(&dn->dn_mtx); 2030fa9e4066Sahrens 2031b24ab676SJeff Bonwick dnp = dn->dn_phys; 2032b24ab676SJeff Bonwick 2033fa9e4066Sahrens doi->doi_data_block_size = dn->dn_datablksz; 2034fa9e4066Sahrens doi->doi_metadata_block_size = dn->dn_indblkshift ? 2035fa9e4066Sahrens 1ULL << dn->dn_indblkshift : 0; 2036b24ab676SJeff Bonwick doi->doi_type = dn->dn_type; 2037b24ab676SJeff Bonwick doi->doi_bonus_type = dn->dn_bonustype; 2038b24ab676SJeff Bonwick doi->doi_bonus_size = dn->dn_bonuslen; 2039fa9e4066Sahrens doi->doi_indirection = dn->dn_nlevels; 2040fa9e4066Sahrens doi->doi_checksum = dn->dn_checksum; 2041fa9e4066Sahrens doi->doi_compress = dn->dn_compress; 2042e77d42eaSMatthew Ahrens doi->doi_nblkptr = dn->dn_nblkptr; 2043b24ab676SJeff Bonwick doi->doi_physical_blocks_512 = (DN_USED_BYTES(dnp) + 256) >> 9; 2044d0475637SMatthew Ahrens doi->doi_max_offset = (dn->dn_maxblkid + 1) * dn->dn_datablksz; 2045b24ab676SJeff Bonwick doi->doi_fill_count = 0; 2046b24ab676SJeff Bonwick for (int i = 0; i < dnp->dn_nblkptr; i++) 20475d7b4d43SMatthew Ahrens doi->doi_fill_count += BP_GET_FILL(&dnp->dn_blkptr[i]); 2048fa9e4066Sahrens 2049fa9e4066Sahrens mutex_exit(&dn->dn_mtx); 2050fa9e4066Sahrens rw_exit(&dn->dn_struct_rwlock); 2051fa9e4066Sahrens } 2052fa9e4066Sahrens 2053fa9e4066Sahrens /* 2054fa9e4066Sahrens * Get information on a DMU object. 2055fa9e4066Sahrens * If doi is NULL, just indicates whether the object exists. 2056fa9e4066Sahrens */ 2057fa9e4066Sahrens int 2058fa9e4066Sahrens dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi) 2059fa9e4066Sahrens { 2060ea8dc4b6Seschrock dnode_t *dn; 2061503ad85cSMatthew Ahrens int err = dnode_hold(os, object, FTAG, &dn); 2062fa9e4066Sahrens 2063ea8dc4b6Seschrock if (err) 2064ea8dc4b6Seschrock return (err); 2065fa9e4066Sahrens 2066fa9e4066Sahrens if (doi != NULL) 2067fa9e4066Sahrens dmu_object_info_from_dnode(dn, doi); 2068fa9e4066Sahrens 2069fa9e4066Sahrens dnode_rele(dn, FTAG); 2070fa9e4066Sahrens return (0); 2071fa9e4066Sahrens } 2072fa9e4066Sahrens 2073fa9e4066Sahrens /* 2074fa9e4066Sahrens * As above, but faster; can be used when you have a held dbuf in hand. 2075fa9e4066Sahrens */ 2076fa9e4066Sahrens void 2077744947dcSTom Erickson dmu_object_info_from_db(dmu_buf_t *db_fake, dmu_object_info_t *doi) 2078fa9e4066Sahrens { 2079744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 2080744947dcSTom Erickson 2081744947dcSTom Erickson DB_DNODE_ENTER(db); 2082744947dcSTom Erickson dmu_object_info_from_dnode(DB_DNODE(db), doi); 2083744947dcSTom Erickson DB_DNODE_EXIT(db); 2084fa9e4066Sahrens } 2085fa9e4066Sahrens 2086fa9e4066Sahrens /* 2087fa9e4066Sahrens * Faster still when you only care about the size. 2088fa9e4066Sahrens * This is specifically optimized for zfs_getattr(). 2089fa9e4066Sahrens */ 2090fa9e4066Sahrens void 2091744947dcSTom Erickson dmu_object_size_from_db(dmu_buf_t *db_fake, uint32_t *blksize, 2092744947dcSTom Erickson u_longlong_t *nblk512) 2093fa9e4066Sahrens { 2094744947dcSTom Erickson dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; 2095744947dcSTom Erickson dnode_t *dn; 2096744947dcSTom Erickson 2097744947dcSTom Erickson DB_DNODE_ENTER(db); 2098744947dcSTom Erickson dn = DB_DNODE(db); 2099fa9e4066Sahrens 2100fa9e4066Sahrens *blksize = dn->dn_datablksz; 210199653d4eSeschrock /* add 1 for dnode space */ 210299653d4eSeschrock *nblk512 = ((DN_USED_BYTES(dn->dn_phys) + SPA_MINBLOCKSIZE/2) >> 210399653d4eSeschrock SPA_MINBLOCKSHIFT) + 1; 2104744947dcSTom Erickson DB_DNODE_EXIT(db); 2105fa9e4066Sahrens } 2106fa9e4066Sahrens 2107fa9e4066Sahrens void 2108fa9e4066Sahrens byteswap_uint64_array(void *vbuf, size_t size) 2109fa9e4066Sahrens { 2110fa9e4066Sahrens uint64_t *buf = vbuf; 2111fa9e4066Sahrens size_t count = size >> 3; 2112fa9e4066Sahrens int i; 2113fa9e4066Sahrens 2114fa9e4066Sahrens ASSERT((size & 7) == 0); 2115fa9e4066Sahrens 2116fa9e4066Sahrens for (i = 0; i < count; i++) 2117fa9e4066Sahrens buf[i] = BSWAP_64(buf[i]); 2118fa9e4066Sahrens } 2119fa9e4066Sahrens 2120fa9e4066Sahrens void 2121fa9e4066Sahrens byteswap_uint32_array(void *vbuf, size_t size) 2122fa9e4066Sahrens { 2123fa9e4066Sahrens uint32_t *buf = vbuf; 2124fa9e4066Sahrens size_t count = size >> 2; 2125fa9e4066Sahrens int i; 2126fa9e4066Sahrens 2127fa9e4066Sahrens ASSERT((size & 3) == 0); 2128fa9e4066Sahrens 2129fa9e4066Sahrens for (i = 0; i < count; i++) 2130fa9e4066Sahrens buf[i] = BSWAP_32(buf[i]); 2131fa9e4066Sahrens } 2132fa9e4066Sahrens 2133fa9e4066Sahrens void 2134fa9e4066Sahrens byteswap_uint16_array(void *vbuf, size_t size) 2135fa9e4066Sahrens { 2136fa9e4066Sahrens uint16_t *buf = vbuf; 2137fa9e4066Sahrens size_t count = size >> 1; 2138fa9e4066Sahrens int i; 2139fa9e4066Sahrens 2140fa9e4066Sahrens ASSERT((size & 1) == 0); 2141fa9e4066Sahrens 2142fa9e4066Sahrens for (i = 0; i < count; i++) 2143fa9e4066Sahrens buf[i] = BSWAP_16(buf[i]); 2144fa9e4066Sahrens } 2145fa9e4066Sahrens 2146fa9e4066Sahrens /* ARGSUSED */ 2147fa9e4066Sahrens void 2148fa9e4066Sahrens byteswap_uint8_array(void *vbuf, size_t size) 2149fa9e4066Sahrens { 2150fa9e4066Sahrens } 2151fa9e4066Sahrens 2152fa9e4066Sahrens void 2153fa9e4066Sahrens dmu_init(void) 2154fa9e4066Sahrens { 21553f9d6ad7SLin Ling zfs_dbgmsg_init(); 2156744947dcSTom Erickson sa_cache_init(); 2157744947dcSTom Erickson xuio_stat_init(); 2158744947dcSTom Erickson dmu_objset_init(); 2159fa9e4066Sahrens dnode_init(); 21607cbf8b43SRich Morris zfetch_init(); 2161fa94a07fSbrendan l2arc_init(); 2162ce636f8bSMatthew Ahrens arc_init(); 2163dcbf3bd6SGeorge Wilson dbuf_init(); 2164fa9e4066Sahrens } 2165fa9e4066Sahrens 2166fa9e4066Sahrens void 2167fa9e4066Sahrens dmu_fini(void) 2168fa9e4066Sahrens { 21693e30c24aSWill Andrews arc_fini(); /* arc depends on l2arc, so arc must go first */ 2170ce636f8bSMatthew Ahrens l2arc_fini(); 21717cbf8b43SRich Morris zfetch_fini(); 2172fa9e4066Sahrens dbuf_fini(); 2173744947dcSTom Erickson dnode_fini(); 2174744947dcSTom Erickson dmu_objset_fini(); 2175c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_fini(); 21760a586ceaSMark Shellenbaum sa_cache_fini(); 21773f9d6ad7SLin Ling zfs_dbgmsg_fini(); 2178fa9e4066Sahrens } 2179