1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 2294d1a210STim Haley * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23fa9e4066Sahrens */ 24fa9e4066Sahrens 25*55da60b9SMark J Musante /* Portions Copyright 2010 Robert Milkowski */ 26*55da60b9SMark J Musante 27fa9e4066Sahrens #ifndef _SYS_DMU_H 28fa9e4066Sahrens #define _SYS_DMU_H 29fa9e4066Sahrens 30fa9e4066Sahrens /* 31fa9e4066Sahrens * This file describes the interface that the DMU provides for its 32fa9e4066Sahrens * consumers. 33fa9e4066Sahrens * 34fa9e4066Sahrens * The DMU also interacts with the SPA. That interface is described in 35fa9e4066Sahrens * dmu_spa.h. 36fa9e4066Sahrens */ 37fa9e4066Sahrens 38fa9e4066Sahrens #include <sys/inttypes.h> 39fa9e4066Sahrens #include <sys/types.h> 40fa9e4066Sahrens #include <sys/param.h> 41ecd6cf80Smarks #include <sys/cred.h> 4271eb0538SChris Kirby #include <sys/time.h> 43fa9e4066Sahrens 44fa9e4066Sahrens #ifdef __cplusplus 45fa9e4066Sahrens extern "C" { 46fa9e4066Sahrens #endif 47fa9e4066Sahrens 48fa9e4066Sahrens struct uio; 49c242f9a0Schunli zhang - Sun Microsystems - Irvine United States struct xuio; 5044eda4d7Smaybee struct page; 51fa9e4066Sahrens struct vnode; 52fa9e4066Sahrens struct spa; 53fa9e4066Sahrens struct zilog; 54fa9e4066Sahrens struct zio; 55fa9e4066Sahrens struct blkptr; 56fa9e4066Sahrens struct zap_cursor; 57fa9e4066Sahrens struct dsl_dataset; 58fa9e4066Sahrens struct dsl_pool; 59fa9e4066Sahrens struct dnode; 60fa9e4066Sahrens struct drr_begin; 61fa9e4066Sahrens struct drr_end; 6244cd46caSbillm struct zbookmark; 6344cd46caSbillm struct spa; 64a2eea2e1Sahrens struct nvlist; 652fdbea25SAleksandr Guzovskiy struct arc_buf; 66b24ab676SJeff Bonwick struct zio_prop; 670a586ceaSMark Shellenbaum struct sa_handle; 68fa9e4066Sahrens 69fa9e4066Sahrens typedef struct objset objset_t; 70fa9e4066Sahrens typedef struct dmu_tx dmu_tx_t; 71fa9e4066Sahrens typedef struct dsl_dir dsl_dir_t; 72fa9e4066Sahrens 73fa9e4066Sahrens typedef enum dmu_object_type { 74fa9e4066Sahrens DMU_OT_NONE, 75fa9e4066Sahrens /* general: */ 76fa9e4066Sahrens DMU_OT_OBJECT_DIRECTORY, /* ZAP */ 77fa9e4066Sahrens DMU_OT_OBJECT_ARRAY, /* UINT64 */ 78fa9e4066Sahrens DMU_OT_PACKED_NVLIST, /* UINT8 (XDR by nvlist_pack/unpack) */ 79fa9e4066Sahrens DMU_OT_PACKED_NVLIST_SIZE, /* UINT64 */ 80fa9e4066Sahrens DMU_OT_BPLIST, /* UINT64 */ 81fa9e4066Sahrens DMU_OT_BPLIST_HDR, /* UINT64 */ 82fa9e4066Sahrens /* spa: */ 83fa9e4066Sahrens DMU_OT_SPACE_MAP_HEADER, /* UINT64 */ 84fa9e4066Sahrens DMU_OT_SPACE_MAP, /* UINT64 */ 85fa9e4066Sahrens /* zil: */ 86fa9e4066Sahrens DMU_OT_INTENT_LOG, /* UINT64 */ 87fa9e4066Sahrens /* dmu: */ 88fa9e4066Sahrens DMU_OT_DNODE, /* DNODE */ 89fa9e4066Sahrens DMU_OT_OBJSET, /* OBJSET */ 90fa9e4066Sahrens /* dsl: */ 911649cd4bStabriz DMU_OT_DSL_DIR, /* UINT64 */ 9287e5029aSahrens DMU_OT_DSL_DIR_CHILD_MAP, /* ZAP */ 9387e5029aSahrens DMU_OT_DSL_DS_SNAP_MAP, /* ZAP */ 94fa9e4066Sahrens DMU_OT_DSL_PROPS, /* ZAP */ 951649cd4bStabriz DMU_OT_DSL_DATASET, /* UINT64 */ 96fa9e4066Sahrens /* zpl: */ 97fa9e4066Sahrens DMU_OT_ZNODE, /* ZNODE */ 98da6c28aaSamw DMU_OT_OLDACL, /* Old ACL */ 99fa9e4066Sahrens DMU_OT_PLAIN_FILE_CONTENTS, /* UINT8 */ 100fa9e4066Sahrens DMU_OT_DIRECTORY_CONTENTS, /* ZAP */ 101fa9e4066Sahrens DMU_OT_MASTER_NODE, /* ZAP */ 102893a6d32Sahrens DMU_OT_UNLINKED_SET, /* ZAP */ 103fa9e4066Sahrens /* zvol: */ 104fa9e4066Sahrens DMU_OT_ZVOL, /* UINT8 */ 105fa9e4066Sahrens DMU_OT_ZVOL_PROP, /* ZAP */ 106fa9e4066Sahrens /* other; for testing only! */ 107fa9e4066Sahrens DMU_OT_PLAIN_OTHER, /* UINT8 */ 108fa9e4066Sahrens DMU_OT_UINT64_OTHER, /* UINT64 */ 109fa9e4066Sahrens DMU_OT_ZAP_OTHER, /* ZAP */ 110ea8dc4b6Seschrock /* new object types: */ 111ea8dc4b6Seschrock DMU_OT_ERROR_LOG, /* ZAP */ 11206eeb2adSek DMU_OT_SPA_HISTORY, /* UINT8 */ 11306eeb2adSek DMU_OT_SPA_HISTORY_OFFSETS, /* spa_his_phys_t */ 114b1b8ab34Slling DMU_OT_POOL_PROPS, /* ZAP */ 115ecd6cf80Smarks DMU_OT_DSL_PERMS, /* ZAP */ 116da6c28aaSamw DMU_OT_ACL, /* ACL */ 117da6c28aaSamw DMU_OT_SYSACL, /* SYSACL */ 118da6c28aaSamw DMU_OT_FUID, /* FUID table (Packed NVLIST UINT8) */ 119da6c28aaSamw DMU_OT_FUID_SIZE, /* FUID table size UINT64 */ 120088f3894Sahrens DMU_OT_NEXT_CLONES, /* ZAP */ 121088f3894Sahrens DMU_OT_SCRUB_QUEUE, /* ZAP */ 12214843421SMatthew Ahrens DMU_OT_USERGROUP_USED, /* ZAP */ 12314843421SMatthew Ahrens DMU_OT_USERGROUP_QUOTA, /* ZAP */ 124842727c2SChris Kirby DMU_OT_USERREFS, /* ZAP */ 125b24ab676SJeff Bonwick DMU_OT_DDT_ZAP, /* ZAP */ 126b24ab676SJeff Bonwick DMU_OT_DDT_STATS, /* ZAP */ 1270a586ceaSMark Shellenbaum DMU_OT_SA, /* System attr */ 1280a586ceaSMark Shellenbaum DMU_OT_SA_MASTER_NODE, /* ZAP */ 1290a586ceaSMark Shellenbaum DMU_OT_SA_ATTR_REGISTRATION, /* ZAP */ 1300a586ceaSMark Shellenbaum DMU_OT_SA_ATTR_LAYOUTS, /* ZAP */ 131fa9e4066Sahrens DMU_OT_NUMTYPES 132fa9e4066Sahrens } dmu_object_type_t; 133fa9e4066Sahrens 134fa9e4066Sahrens typedef enum dmu_objset_type { 135fa9e4066Sahrens DMU_OST_NONE, 136fa9e4066Sahrens DMU_OST_META, 137fa9e4066Sahrens DMU_OST_ZFS, 138fa9e4066Sahrens DMU_OST_ZVOL, 139fa9e4066Sahrens DMU_OST_OTHER, /* For testing only! */ 140fa9e4066Sahrens DMU_OST_ANY, /* Be careful! */ 141fa9e4066Sahrens DMU_OST_NUMTYPES 142fa9e4066Sahrens } dmu_objset_type_t; 143fa9e4066Sahrens 144fa9e4066Sahrens void byteswap_uint64_array(void *buf, size_t size); 145fa9e4066Sahrens void byteswap_uint32_array(void *buf, size_t size); 146fa9e4066Sahrens void byteswap_uint16_array(void *buf, size_t size); 147fa9e4066Sahrens void byteswap_uint8_array(void *buf, size_t size); 148fa9e4066Sahrens void zap_byteswap(void *buf, size_t size); 149da6c28aaSamw void zfs_oldacl_byteswap(void *buf, size_t size); 150fa9e4066Sahrens void zfs_acl_byteswap(void *buf, size_t size); 151fa9e4066Sahrens void zfs_znode_byteswap(void *buf, size_t size); 152fa9e4066Sahrens 1530b69c2f0Sahrens #define DS_FIND_SNAPSHOTS (1<<0) 1540b69c2f0Sahrens #define DS_FIND_CHILDREN (1<<1) 155fa9e4066Sahrens 156fa9e4066Sahrens /* 157fa9e4066Sahrens * The maximum number of bytes that can be accessed as part of one 158fa9e4066Sahrens * operation, including metadata. 159fa9e4066Sahrens */ 160fa9e4066Sahrens #define DMU_MAX_ACCESS (10<<20) /* 10MB */ 161cdb0ab79Smaybee #define DMU_MAX_DELETEBLKCNT (20480) /* ~5MB of indirect blocks */ 162fa9e4066Sahrens 16314843421SMatthew Ahrens #define DMU_USERUSED_OBJECT (-1ULL) 16414843421SMatthew Ahrens #define DMU_GROUPUSED_OBJECT (-2ULL) 165b24ab676SJeff Bonwick #define DMU_DEADLIST_OBJECT (-3ULL) 16614843421SMatthew Ahrens 1670a586ceaSMark Shellenbaum /* 1680a586ceaSMark Shellenbaum * artificial blkids for bonus buffer and spill blocks 1690a586ceaSMark Shellenbaum */ 1700a586ceaSMark Shellenbaum #define DMU_BONUS_BLKID (-1ULL) 1710a586ceaSMark Shellenbaum #define DMU_SPILL_BLKID (-2ULL) 172fa9e4066Sahrens /* 173fa9e4066Sahrens * Public routines to create, destroy, open, and close objsets. 174fa9e4066Sahrens */ 175503ad85cSMatthew Ahrens int dmu_objset_hold(const char *name, void *tag, objset_t **osp); 176503ad85cSMatthew Ahrens int dmu_objset_own(const char *name, dmu_objset_type_t type, 177503ad85cSMatthew Ahrens boolean_t readonly, void *tag, objset_t **osp); 178503ad85cSMatthew Ahrens void dmu_objset_rele(objset_t *os, void *tag); 179503ad85cSMatthew Ahrens void dmu_objset_disown(objset_t *os, void *tag); 180503ad85cSMatthew Ahrens int dmu_objset_open_ds(struct dsl_dataset *ds, objset_t **osp); 181503ad85cSMatthew Ahrens 1821934e92fSmaybee int dmu_objset_evict_dbufs(objset_t *os); 183ae46e4c7SMatthew Ahrens int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 184ecd6cf80Smarks void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg); 185ae46e4c7SMatthew Ahrens int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin, 186ae46e4c7SMatthew Ahrens uint64_t flags); 187842727c2SChris Kirby int dmu_objset_destroy(const char *name, boolean_t defer); 188842727c2SChris Kirby int dmu_snapshots_destroy(char *fsname, char *snapname, boolean_t defer); 189ea2f5b9eSMatthew Ahrens int dmu_objset_snapshot(char *fsname, char *snapname, struct nvlist *props, 190ea2f5b9eSMatthew Ahrens boolean_t recursive); 191cdf5b4caSmmusante int dmu_objset_rename(const char *name, const char *newname, 192cdf5b4caSmmusante boolean_t recursive); 193fd136879SMatthew Ahrens int dmu_objset_find(char *name, int func(const char *, void *), void *arg, 194fa9e4066Sahrens int flags); 195fa9e4066Sahrens void dmu_objset_byteswap(void *buf, size_t size); 196fa9e4066Sahrens 197fa9e4066Sahrens typedef struct dmu_buf { 198fa9e4066Sahrens uint64_t db_object; /* object that this buffer is part of */ 199fa9e4066Sahrens uint64_t db_offset; /* byte offset in this object */ 200fa9e4066Sahrens uint64_t db_size; /* size of buffer in bytes */ 201fa9e4066Sahrens void *db_data; /* data in buffer */ 202fa9e4066Sahrens } dmu_buf_t; 203fa9e4066Sahrens 204fa9e4066Sahrens typedef void dmu_buf_evict_func_t(struct dmu_buf *db, void *user_ptr); 205fa9e4066Sahrens 20699653d4eSeschrock /* 20799653d4eSeschrock * The names of zap entries in the DIRECTORY_OBJECT of the MOS. 20899653d4eSeschrock */ 209fa9e4066Sahrens #define DMU_POOL_DIRECTORY_OBJECT 1 210fa9e4066Sahrens #define DMU_POOL_CONFIG "config" 211fa9e4066Sahrens #define DMU_POOL_ROOT_DATASET "root_dataset" 212fa9e4066Sahrens #define DMU_POOL_SYNC_BPLIST "sync_bplist" 213ea8dc4b6Seschrock #define DMU_POOL_ERRLOG_SCRUB "errlog_scrub" 214ea8dc4b6Seschrock #define DMU_POOL_ERRLOG_LAST "errlog_last" 21599653d4eSeschrock #define DMU_POOL_SPARES "spares" 21699653d4eSeschrock #define DMU_POOL_DEFLATE "deflate" 21706eeb2adSek #define DMU_POOL_HISTORY "history" 218b1b8ab34Slling #define DMU_POOL_PROPS "pool_props" 219fa94a07fSbrendan #define DMU_POOL_L2CACHE "l2cache" 220ca45db41SChris Kirby #define DMU_POOL_TMP_USERREFS "tmp_userrefs" 221b24ab676SJeff Bonwick #define DMU_POOL_DDT "DDT-%s-%s-%s" 222b24ab676SJeff Bonwick #define DMU_POOL_DDT_STATS "DDT-statistics" 223fa9e4066Sahrens 224088f3894Sahrens /* 4x8 zbookmark_t */ 225088f3894Sahrens #define DMU_POOL_SCRUB_BOOKMARK "scrub_bookmark" 226bbfd46c4SJeff Bonwick /* 4x8 ddt_bookmark_t */ 227bbfd46c4SJeff Bonwick #define DMU_POOL_SCRUB_DDT_BOOKMARK "scrub_ddt_bookmark" 228bbfd46c4SJeff Bonwick /* 1x8 max_class */ 229bbfd46c4SJeff Bonwick #define DMU_POOL_SCRUB_DDT_CLASS_MAX "scrub_ddt_class_max" 230088f3894Sahrens /* 1x8 zap obj DMU_OT_SCRUB_QUEUE */ 231088f3894Sahrens #define DMU_POOL_SCRUB_QUEUE "scrub_queue" 232088f3894Sahrens /* 1x8 txg */ 233088f3894Sahrens #define DMU_POOL_SCRUB_MIN_TXG "scrub_min_txg" 234088f3894Sahrens /* 1x8 txg */ 235088f3894Sahrens #define DMU_POOL_SCRUB_MAX_TXG "scrub_max_txg" 236088f3894Sahrens /* 1x4 enum scrub_func */ 237088f3894Sahrens #define DMU_POOL_SCRUB_FUNC "scrub_func" 238088f3894Sahrens /* 1x8 count */ 239088f3894Sahrens #define DMU_POOL_SCRUB_ERRORS "scrub_errors" 240088f3894Sahrens 241fa9e4066Sahrens /* 242fa9e4066Sahrens * Allocate an object from this objset. The range of object numbers 243fa9e4066Sahrens * available is (0, DN_MAX_OBJECT). Object 0 is the meta-dnode. 244fa9e4066Sahrens * 245fa9e4066Sahrens * The transaction must be assigned to a txg. The newly allocated 246fa9e4066Sahrens * object will be "held" in the transaction (ie. you can modify the 247fa9e4066Sahrens * newly allocated object in this transaction). 248fa9e4066Sahrens * 249fa9e4066Sahrens * dmu_object_alloc() chooses an object and returns it in *objectp. 250fa9e4066Sahrens * 251fa9e4066Sahrens * dmu_object_claim() allocates a specific object number. If that 252fa9e4066Sahrens * number is already allocated, it fails and returns EEXIST. 253fa9e4066Sahrens * 254fa9e4066Sahrens * Return 0 on success, or ENOSPC or EEXIST as specified above. 255fa9e4066Sahrens */ 256fa9e4066Sahrens uint64_t dmu_object_alloc(objset_t *os, dmu_object_type_t ot, 257fa9e4066Sahrens int blocksize, dmu_object_type_t bonus_type, int bonus_len, dmu_tx_t *tx); 258fa9e4066Sahrens int dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot, 259fa9e4066Sahrens int blocksize, dmu_object_type_t bonus_type, int bonus_len, dmu_tx_t *tx); 260fa9e4066Sahrens int dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot, 2612bf405a2SMark Maybee int blocksize, dmu_object_type_t bonustype, int bonuslen); 262fa9e4066Sahrens 263fa9e4066Sahrens /* 264fa9e4066Sahrens * Free an object from this objset. 265fa9e4066Sahrens * 266fa9e4066Sahrens * The object's data will be freed as well (ie. you don't need to call 267fa9e4066Sahrens * dmu_free(object, 0, -1, tx)). 268fa9e4066Sahrens * 269fa9e4066Sahrens * The object need not be held in the transaction. 270fa9e4066Sahrens * 271fa9e4066Sahrens * If there are any holds on this object's buffers (via dmu_buf_hold()), 272fa9e4066Sahrens * or tx holds on the object (via dmu_tx_hold_object()), you can not 273fa9e4066Sahrens * free it; it fails and returns EBUSY. 274fa9e4066Sahrens * 275fa9e4066Sahrens * If the object is not allocated, it fails and returns ENOENT. 276fa9e4066Sahrens * 277fa9e4066Sahrens * Return 0 on success, or EBUSY or ENOENT as specified above. 278fa9e4066Sahrens */ 279fa9e4066Sahrens int dmu_object_free(objset_t *os, uint64_t object, dmu_tx_t *tx); 280fa9e4066Sahrens 281fa9e4066Sahrens /* 282fa9e4066Sahrens * Find the next allocated or free object. 283fa9e4066Sahrens * 284fa9e4066Sahrens * The objectp parameter is in-out. It will be updated to be the next 2856754306eSahrens * object which is allocated. Ignore objects which have not been 2866754306eSahrens * modified since txg. 287fa9e4066Sahrens * 288fa9e4066Sahrens * XXX Can only be called on a objset with no dirty data. 289fa9e4066Sahrens * 290fa9e4066Sahrens * Returns 0 on success, or ENOENT if there are no more objects. 291fa9e4066Sahrens */ 2926754306eSahrens int dmu_object_next(objset_t *os, uint64_t *objectp, 2936754306eSahrens boolean_t hole, uint64_t txg); 294fa9e4066Sahrens 295fa9e4066Sahrens /* 296fa9e4066Sahrens * Set the data blocksize for an object. 297fa9e4066Sahrens * 298fa9e4066Sahrens * The object cannot have any blocks allcated beyond the first. If 299fa9e4066Sahrens * the first block is allocated already, the new size must be greater 300fa9e4066Sahrens * than the current block size. If these conditions are not met, 301fa9e4066Sahrens * ENOTSUP will be returned. 302fa9e4066Sahrens * 303fa9e4066Sahrens * Returns 0 on success, or EBUSY if there are any holds on the object 304fa9e4066Sahrens * contents, or ENOTSUP as described above. 305fa9e4066Sahrens */ 306fa9e4066Sahrens int dmu_object_set_blocksize(objset_t *os, uint64_t object, uint64_t size, 307fa9e4066Sahrens int ibs, dmu_tx_t *tx); 308fa9e4066Sahrens 309fa9e4066Sahrens /* 310fa9e4066Sahrens * Set the checksum property on a dnode. The new checksum algorithm will 311fa9e4066Sahrens * apply to all newly written blocks; existing blocks will not be affected. 312fa9e4066Sahrens */ 313fa9e4066Sahrens void dmu_object_set_checksum(objset_t *os, uint64_t object, uint8_t checksum, 314fa9e4066Sahrens dmu_tx_t *tx); 315fa9e4066Sahrens 316fa9e4066Sahrens /* 317fa9e4066Sahrens * Set the compress property on a dnode. The new compression algorithm will 318fa9e4066Sahrens * apply to all newly written blocks; existing blocks will not be affected. 319fa9e4066Sahrens */ 320fa9e4066Sahrens void dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress, 321fa9e4066Sahrens dmu_tx_t *tx); 322fa9e4066Sahrens 32344cd46caSbillm /* 324b24ab676SJeff Bonwick * Decide how to write a block: checksum, compression, number of copies, etc. 32544cd46caSbillm */ 326b24ab676SJeff Bonwick #define WP_NOFILL 0x1 327b24ab676SJeff Bonwick #define WP_DMU_SYNC 0x2 3280a586ceaSMark Shellenbaum #define WP_SPILL 0x4 329b24ab676SJeff Bonwick 330b24ab676SJeff Bonwick void dmu_write_policy(objset_t *os, struct dnode *dn, int level, int wp, 331b24ab676SJeff Bonwick struct zio_prop *zp); 332fa9e4066Sahrens /* 333fa9e4066Sahrens * The bonus data is accessed more or less like a regular buffer. 334fa9e4066Sahrens * You must dmu_bonus_hold() to get the buffer, which will give you a 335fa9e4066Sahrens * dmu_buf_t with db_offset==-1ULL, and db_size = the size of the bonus 336fa9e4066Sahrens * data. As with any normal buffer, you must call dmu_buf_read() to 337fa9e4066Sahrens * read db_data, dmu_buf_will_dirty() before modifying it, and the 338fa9e4066Sahrens * object must be held in an assigned transaction before calling 339fa9e4066Sahrens * dmu_buf_will_dirty. You may use dmu_buf_set_user() on the bonus 340fa9e4066Sahrens * buffer as well. You must release your hold with dmu_buf_rele(). 341fa9e4066Sahrens */ 342ea8dc4b6Seschrock int dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **); 343fa9e4066Sahrens int dmu_bonus_max(void); 3441934e92fSmaybee int dmu_set_bonus(dmu_buf_t *, int, dmu_tx_t *); 3450a586ceaSMark Shellenbaum int dmu_set_bonustype(dmu_buf_t *, dmu_object_type_t, dmu_tx_t *); 3460a586ceaSMark Shellenbaum int dmu_rm_spill(objset_t *, uint64_t, dmu_tx_t *); 3470a586ceaSMark Shellenbaum 3480a586ceaSMark Shellenbaum /* 3490a586ceaSMark Shellenbaum * Special spill buffer support used by "SA" framework 3500a586ceaSMark Shellenbaum */ 3510a586ceaSMark Shellenbaum 3520a586ceaSMark Shellenbaum int dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp); 3530a586ceaSMark Shellenbaum int dmu_spill_hold_by_dnode(struct dnode *dn, uint32_t flags, 3540a586ceaSMark Shellenbaum void *tag, dmu_buf_t **dbp); 3550a586ceaSMark Shellenbaum int dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp); 356fa9e4066Sahrens 357fa9e4066Sahrens /* 358fa9e4066Sahrens * Obtain the DMU buffer from the specified object which contains the 359fa9e4066Sahrens * specified offset. dmu_buf_hold() puts a "hold" on the buffer, so 360fa9e4066Sahrens * that it will remain in memory. You must release the hold with 361fa9e4066Sahrens * dmu_buf_rele(). You musn't access the dmu_buf_t after releasing your 362fa9e4066Sahrens * hold. You must have a hold on any dmu_buf_t* you pass to the DMU. 363fa9e4066Sahrens * 364fa9e4066Sahrens * You must call dmu_buf_read, dmu_buf_will_dirty, or dmu_buf_will_fill 365fa9e4066Sahrens * on the returned buffer before reading or writing the buffer's 366fa9e4066Sahrens * db_data. The comments for those routines describe what particular 367fa9e4066Sahrens * operations are valid after calling them. 368fa9e4066Sahrens * 369fa9e4066Sahrens * The object number must be a valid, allocated object number. 370fa9e4066Sahrens */ 371ea8dc4b6Seschrock int dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset, 37247cb52daSJeff Bonwick void *tag, dmu_buf_t **, int flags); 373fa9e4066Sahrens void dmu_buf_add_ref(dmu_buf_t *db, void* tag); 374ea8dc4b6Seschrock void dmu_buf_rele(dmu_buf_t *db, void *tag); 375fa9e4066Sahrens uint64_t dmu_buf_refcount(dmu_buf_t *db); 376fa9e4066Sahrens 377fa9e4066Sahrens /* 378fa9e4066Sahrens * dmu_buf_hold_array holds the DMU buffers which contain all bytes in a 379fa9e4066Sahrens * range of an object. A pointer to an array of dmu_buf_t*'s is 380fa9e4066Sahrens * returned (in *dbpp). 381fa9e4066Sahrens * 382fa9e4066Sahrens * dmu_buf_rele_array releases the hold on an array of dmu_buf_t*'s, and 383fa9e4066Sahrens * frees the array. The hold on the array of buffers MUST be released 384fa9e4066Sahrens * with dmu_buf_rele_array. You can NOT release the hold on each buffer 385fa9e4066Sahrens * individually with dmu_buf_rele. 386fa9e4066Sahrens */ 38713506d1eSmaybee int dmu_buf_hold_array_by_bonus(dmu_buf_t *db, uint64_t offset, 38813506d1eSmaybee uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp); 389ea8dc4b6Seschrock void dmu_buf_rele_array(dmu_buf_t **, int numbufs, void *tag); 390fa9e4066Sahrens 391fa9e4066Sahrens /* 392fa9e4066Sahrens * Returns NULL on success, or the existing user ptr if it's already 393fa9e4066Sahrens * been set. 394fa9e4066Sahrens * 395fa9e4066Sahrens * user_ptr is for use by the user and can be obtained via dmu_buf_get_user(). 396fa9e4066Sahrens * 397fa9e4066Sahrens * user_data_ptr_ptr should be NULL, or a pointer to a pointer which 398fa9e4066Sahrens * will be set to db->db_data when you are allowed to access it. Note 399fa9e4066Sahrens * that db->db_data (the pointer) can change when you do dmu_buf_read(), 400fa9e4066Sahrens * dmu_buf_tryupgrade(), dmu_buf_will_dirty(), or dmu_buf_will_fill(). 401fa9e4066Sahrens * *user_data_ptr_ptr will be set to the new value when it changes. 402fa9e4066Sahrens * 403fa9e4066Sahrens * If non-NULL, pageout func will be called when this buffer is being 404fa9e4066Sahrens * excised from the cache, so that you can clean up the data structure 405fa9e4066Sahrens * pointed to by user_ptr. 406fa9e4066Sahrens * 407fa9e4066Sahrens * dmu_evict_user() will call the pageout func for all buffers in a 408fa9e4066Sahrens * objset with a given pageout func. 409fa9e4066Sahrens */ 410fa9e4066Sahrens void *dmu_buf_set_user(dmu_buf_t *db, void *user_ptr, void *user_data_ptr_ptr, 411fa9e4066Sahrens dmu_buf_evict_func_t *pageout_func); 412fa9e4066Sahrens /* 413fa9e4066Sahrens * set_user_ie is the same as set_user, but request immediate eviction 414fa9e4066Sahrens * when hold count goes to zero. 415fa9e4066Sahrens */ 416fa9e4066Sahrens void *dmu_buf_set_user_ie(dmu_buf_t *db, void *user_ptr, 417fa9e4066Sahrens void *user_data_ptr_ptr, dmu_buf_evict_func_t *pageout_func); 418fa9e4066Sahrens void *dmu_buf_update_user(dmu_buf_t *db_fake, void *old_user_ptr, 419fa9e4066Sahrens void *user_ptr, void *user_data_ptr_ptr, 420fa9e4066Sahrens dmu_buf_evict_func_t *pageout_func); 421fa9e4066Sahrens void dmu_evict_user(objset_t *os, dmu_buf_evict_func_t *func); 422fa9e4066Sahrens 423fa9e4066Sahrens /* 424fa9e4066Sahrens * Returns the user_ptr set with dmu_buf_set_user(), or NULL if not set. 425fa9e4066Sahrens */ 426fa9e4066Sahrens void *dmu_buf_get_user(dmu_buf_t *db); 427fa9e4066Sahrens 428fa9e4066Sahrens /* 429fa9e4066Sahrens * Indicate that you are going to modify the buffer's data (db_data). 430fa9e4066Sahrens * 431fa9e4066Sahrens * The transaction (tx) must be assigned to a txg (ie. you've called 432fa9e4066Sahrens * dmu_tx_assign()). The buffer's object must be held in the tx 433fa9e4066Sahrens * (ie. you've called dmu_tx_hold_object(tx, db->db_object)). 434fa9e4066Sahrens */ 435fa9e4066Sahrens void dmu_buf_will_dirty(dmu_buf_t *db, dmu_tx_t *tx); 436fa9e4066Sahrens 4373d692628SSanjeev Bagewadi /* 4383d692628SSanjeev Bagewadi * Tells if the given dbuf is freeable. 4393d692628SSanjeev Bagewadi */ 4403d692628SSanjeev Bagewadi boolean_t dmu_buf_freeable(dmu_buf_t *); 4413d692628SSanjeev Bagewadi 442fa9e4066Sahrens /* 443fa9e4066Sahrens * You must create a transaction, then hold the objects which you will 444fa9e4066Sahrens * (or might) modify as part of this transaction. Then you must assign 445fa9e4066Sahrens * the transaction to a transaction group. Once the transaction has 446fa9e4066Sahrens * been assigned, you can modify buffers which belong to held objects as 447fa9e4066Sahrens * part of this transaction. You can't modify buffers before the 448fa9e4066Sahrens * transaction has been assigned; you can't modify buffers which don't 449fa9e4066Sahrens * belong to objects which this transaction holds; you can't hold 450fa9e4066Sahrens * objects once the transaction has been assigned. You may hold an 451fa9e4066Sahrens * object which you are going to free (with dmu_object_free()), but you 452fa9e4066Sahrens * don't have to. 453fa9e4066Sahrens * 454fa9e4066Sahrens * You can abort the transaction before it has been assigned. 455fa9e4066Sahrens * 456fa9e4066Sahrens * Note that you may hold buffers (with dmu_buf_hold) at any time, 457fa9e4066Sahrens * regardless of transaction state. 458fa9e4066Sahrens */ 459fa9e4066Sahrens 460fa9e4066Sahrens #define DMU_NEW_OBJECT (-1ULL) 461fa9e4066Sahrens #define DMU_OBJECT_END (-1ULL) 462fa9e4066Sahrens 463fa9e4066Sahrens dmu_tx_t *dmu_tx_create(objset_t *os); 464fa9e4066Sahrens void dmu_tx_hold_write(dmu_tx_t *tx, uint64_t object, uint64_t off, int len); 465fa9e4066Sahrens void dmu_tx_hold_free(dmu_tx_t *tx, uint64_t object, uint64_t off, 466fa9e4066Sahrens uint64_t len); 46714843421SMatthew Ahrens void dmu_tx_hold_zap(dmu_tx_t *tx, uint64_t object, int add, const char *name); 468fa9e4066Sahrens void dmu_tx_hold_bonus(dmu_tx_t *tx, uint64_t object); 4690a586ceaSMark Shellenbaum void dmu_tx_hold_spill(dmu_tx_t *tx, uint64_t object); 4700a586ceaSMark Shellenbaum void dmu_tx_hold_sa(dmu_tx_t *tx, struct sa_handle *hdl, boolean_t may_grow); 4710a586ceaSMark Shellenbaum void dmu_tx_hold_sa_create(dmu_tx_t *tx, int total_size); 472fa9e4066Sahrens void dmu_tx_abort(dmu_tx_t *tx); 473fa9e4066Sahrens int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how); 4748a2f1b91Sahrens void dmu_tx_wait(dmu_tx_t *tx); 475fa9e4066Sahrens void dmu_tx_commit(dmu_tx_t *tx); 476fa9e4066Sahrens 477d20e665cSRicardo M. Correia /* 478d20e665cSRicardo M. Correia * To register a commit callback, dmu_tx_callback_register() must be called. 479d20e665cSRicardo M. Correia * 480d20e665cSRicardo M. Correia * dcb_data is a pointer to caller private data that is passed on as a 481d20e665cSRicardo M. Correia * callback parameter. The caller is responsible for properly allocating and 482d20e665cSRicardo M. Correia * freeing it. 483d20e665cSRicardo M. Correia * 484d20e665cSRicardo M. Correia * When registering a callback, the transaction must be already created, but 485d20e665cSRicardo M. Correia * it cannot be committed or aborted. It can be assigned to a txg or not. 486d20e665cSRicardo M. Correia * 487d20e665cSRicardo M. Correia * The callback will be called after the transaction has been safely written 488d20e665cSRicardo M. Correia * to stable storage and will also be called if the dmu_tx is aborted. 489d20e665cSRicardo M. Correia * If there is any error which prevents the transaction from being committed to 490d20e665cSRicardo M. Correia * disk, the callback will be called with a value of error != 0. 491d20e665cSRicardo M. Correia */ 492d20e665cSRicardo M. Correia typedef void dmu_tx_callback_func_t(void *dcb_data, int error); 493d20e665cSRicardo M. Correia 494d20e665cSRicardo M. Correia void dmu_tx_callback_register(dmu_tx_t *tx, dmu_tx_callback_func_t *dcb_func, 495d20e665cSRicardo M. Correia void *dcb_data); 496d20e665cSRicardo M. Correia 497fa9e4066Sahrens /* 498fa9e4066Sahrens * Free up the data blocks for a defined range of a file. If size is 499fa9e4066Sahrens * zero, the range from offset to end-of-file is freed. 500fa9e4066Sahrens */ 501ea8dc4b6Seschrock int dmu_free_range(objset_t *os, uint64_t object, uint64_t offset, 502fa9e4066Sahrens uint64_t size, dmu_tx_t *tx); 503cdb0ab79Smaybee int dmu_free_long_range(objset_t *os, uint64_t object, uint64_t offset, 504cdb0ab79Smaybee uint64_t size); 505cdb0ab79Smaybee int dmu_free_object(objset_t *os, uint64_t object); 506fa9e4066Sahrens 507fa9e4066Sahrens /* 508fa9e4066Sahrens * Convenience functions. 509fa9e4066Sahrens * 510fa9e4066Sahrens * Canfail routines will return 0 on success, or an errno if there is a 511fa9e4066Sahrens * nonrecoverable I/O error. 512fa9e4066Sahrens */ 5137bfdf011SNeil Perrin #define DMU_READ_PREFETCH 0 /* prefetch */ 5147bfdf011SNeil Perrin #define DMU_READ_NO_PREFETCH 1 /* don't prefetch */ 515ea8dc4b6Seschrock int dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 5167bfdf011SNeil Perrin void *buf, uint32_t flags); 517fa9e4066Sahrens void dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 518fa9e4066Sahrens const void *buf, dmu_tx_t *tx); 51982c9918fSTim Haley void dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, 52082c9918fSTim Haley dmu_tx_t *tx); 521feb08c6bSbillm int dmu_read_uio(objset_t *os, uint64_t object, struct uio *uio, uint64_t size); 522feb08c6bSbillm int dmu_write_uio(objset_t *os, uint64_t object, struct uio *uio, uint64_t size, 523feb08c6bSbillm dmu_tx_t *tx); 52494d1a210STim Haley int dmu_write_uio_dbuf(dmu_buf_t *zdb, struct uio *uio, uint64_t size, 52594d1a210STim Haley dmu_tx_t *tx); 52644eda4d7Smaybee int dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, 52744eda4d7Smaybee uint64_t size, struct page *pp, dmu_tx_t *tx); 5282fdbea25SAleksandr Guzovskiy struct arc_buf *dmu_request_arcbuf(dmu_buf_t *handle, int size); 5292fdbea25SAleksandr Guzovskiy void dmu_return_arcbuf(struct arc_buf *buf); 5302fdbea25SAleksandr Guzovskiy void dmu_assign_arcbuf(dmu_buf_t *handle, uint64_t offset, struct arc_buf *buf, 5312fdbea25SAleksandr Guzovskiy dmu_tx_t *tx); 532c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int dmu_xuio_init(struct xuio *uio, int niov); 533c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void dmu_xuio_fini(struct xuio *uio); 534c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int dmu_xuio_add(struct xuio *uio, struct arc_buf *abuf, offset_t off, 535c242f9a0Schunli zhang - Sun Microsystems - Irvine United States size_t n); 536c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int dmu_xuio_cnt(struct xuio *uio); 537c242f9a0Schunli zhang - Sun Microsystems - Irvine United States struct arc_buf *dmu_xuio_arcbuf(struct xuio *uio, int i); 538c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void dmu_xuio_clear(struct xuio *uio, int i); 539c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void xuio_stat_wbuf_copied(); 540c242f9a0Schunli zhang - Sun Microsystems - Irvine United States void xuio_stat_wbuf_nocopy(); 541fa9e4066Sahrens 542416e0cd8Sek extern int zfs_prefetch_disable; 543416e0cd8Sek 544fa9e4066Sahrens /* 545fa9e4066Sahrens * Asynchronously try to read in the data. 546fa9e4066Sahrens */ 547fa9e4066Sahrens void dmu_prefetch(objset_t *os, uint64_t object, uint64_t offset, 548fa9e4066Sahrens uint64_t len); 549fa9e4066Sahrens 550fa9e4066Sahrens typedef struct dmu_object_info { 551b24ab676SJeff Bonwick /* All sizes are in bytes unless otherwise indicated. */ 552fa9e4066Sahrens uint32_t doi_data_block_size; 553fa9e4066Sahrens uint32_t doi_metadata_block_size; 554fa9e4066Sahrens dmu_object_type_t doi_type; 555fa9e4066Sahrens dmu_object_type_t doi_bonus_type; 556b24ab676SJeff Bonwick uint64_t doi_bonus_size; 557fa9e4066Sahrens uint8_t doi_indirection; /* 2 = dnode->indirect->data */ 558fa9e4066Sahrens uint8_t doi_checksum; 559fa9e4066Sahrens uint8_t doi_compress; 560fa9e4066Sahrens uint8_t doi_pad[5]; 561b24ab676SJeff Bonwick uint64_t doi_physical_blocks_512; /* data + metadata, 512b blks */ 562b24ab676SJeff Bonwick uint64_t doi_max_offset; 563b24ab676SJeff Bonwick uint64_t doi_fill_count; /* number of non-empty blocks */ 564fa9e4066Sahrens } dmu_object_info_t; 565fa9e4066Sahrens 566e45ce728Sahrens typedef void arc_byteswap_func_t(void *buf, size_t size); 567e45ce728Sahrens 568fa9e4066Sahrens typedef struct dmu_object_type_info { 569e45ce728Sahrens arc_byteswap_func_t *ot_byteswap; 570fa9e4066Sahrens boolean_t ot_metadata; 571fa9e4066Sahrens char *ot_name; 572fa9e4066Sahrens } dmu_object_type_info_t; 573fa9e4066Sahrens 574fa9e4066Sahrens extern const dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES]; 575fa9e4066Sahrens 576fa9e4066Sahrens /* 577fa9e4066Sahrens * Get information on a DMU object. 578fa9e4066Sahrens * 579fa9e4066Sahrens * Return 0 on success or ENOENT if object is not allocated. 580fa9e4066Sahrens * 581fa9e4066Sahrens * If doi is NULL, just indicates whether the object exists. 582fa9e4066Sahrens */ 583fa9e4066Sahrens int dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi); 584fa9e4066Sahrens void dmu_object_info_from_dnode(struct dnode *dn, dmu_object_info_t *doi); 585fa9e4066Sahrens void dmu_object_info_from_db(dmu_buf_t *db, dmu_object_info_t *doi); 586fa9e4066Sahrens void dmu_object_size_from_db(dmu_buf_t *db, uint32_t *blksize, 587fa9e4066Sahrens u_longlong_t *nblk512); 588fa9e4066Sahrens 589fa9e4066Sahrens typedef struct dmu_objset_stats { 590a2eea2e1Sahrens uint64_t dds_num_clones; /* number of clones of this */ 591a2eea2e1Sahrens uint64_t dds_creation_txg; 5923cb34c60Sahrens uint64_t dds_guid; 593fa9e4066Sahrens dmu_objset_type_t dds_type; 594fa9e4066Sahrens uint8_t dds_is_snapshot; 59531fd60d3Sahrens uint8_t dds_inconsistent; 5963cb34c60Sahrens char dds_origin[MAXNAMELEN]; 597a2eea2e1Sahrens } dmu_objset_stats_t; 598fa9e4066Sahrens 599a2eea2e1Sahrens /* 600a2eea2e1Sahrens * Get stats on a dataset. 601a2eea2e1Sahrens */ 602a2eea2e1Sahrens void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 603fa9e4066Sahrens 604a2eea2e1Sahrens /* 605a2eea2e1Sahrens * Add entries to the nvlist for all the objset's properties. See 606a2eea2e1Sahrens * zfs_prop_table[] and zfs(1m) for details on the properties. 607a2eea2e1Sahrens */ 608a2eea2e1Sahrens void dmu_objset_stats(objset_t *os, struct nvlist *nv); 609fa9e4066Sahrens 610a2eea2e1Sahrens /* 611a2eea2e1Sahrens * Get the space usage statistics for statvfs(). 612a2eea2e1Sahrens * 613a2eea2e1Sahrens * refdbytes is the amount of space "referenced" by this objset. 614a2eea2e1Sahrens * availbytes is the amount of space available to this objset, taking 615a2eea2e1Sahrens * into account quotas & reservations, assuming that no other objsets 616a2eea2e1Sahrens * use the space first. These values correspond to the 'referenced' and 617a2eea2e1Sahrens * 'available' properties, described in the zfs(1m) manpage. 618a2eea2e1Sahrens * 619a2eea2e1Sahrens * usedobjs and availobjs are the number of objects currently allocated, 620a2eea2e1Sahrens * and available. 621a2eea2e1Sahrens */ 622a2eea2e1Sahrens void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 623a2eea2e1Sahrens uint64_t *usedobjsp, uint64_t *availobjsp); 624fa9e4066Sahrens 625fa9e4066Sahrens /* 626a2eea2e1Sahrens * The fsid_guid is a 56-bit ID that can change to avoid collisions. 627a2eea2e1Sahrens * (Contrast with the ds_guid which is a 64-bit ID that will never 628a2eea2e1Sahrens * change, so there is a small probability that it will collide.) 629fa9e4066Sahrens */ 630a2eea2e1Sahrens uint64_t dmu_objset_fsid_guid(objset_t *os); 631fa9e4066Sahrens 63271eb0538SChris Kirby /* 63371eb0538SChris Kirby * Get the [cm]time for an objset's snapshot dir 63471eb0538SChris Kirby */ 63571eb0538SChris Kirby timestruc_t dmu_objset_snap_cmtime(objset_t *os); 63671eb0538SChris Kirby 637fa9e4066Sahrens int dmu_objset_is_snapshot(objset_t *os); 638fa9e4066Sahrens 639fa9e4066Sahrens extern struct spa *dmu_objset_spa(objset_t *os); 640fa9e4066Sahrens extern struct zilog *dmu_objset_zil(objset_t *os); 641fa9e4066Sahrens extern struct dsl_pool *dmu_objset_pool(objset_t *os); 642fa9e4066Sahrens extern struct dsl_dataset *dmu_objset_ds(objset_t *os); 643fa9e4066Sahrens extern void dmu_objset_name(objset_t *os, char *buf); 644fa9e4066Sahrens extern dmu_objset_type_t dmu_objset_type(objset_t *os); 645fa9e4066Sahrens extern uint64_t dmu_objset_id(objset_t *os); 646*55da60b9SMark J Musante extern uint64_t dmu_objset_syncprop(objset_t *os); 647e09fa4daSNeil Perrin extern uint64_t dmu_objset_logbias(objset_t *os); 648fa9e4066Sahrens extern int dmu_snapshot_list_next(objset_t *os, int namelen, char *name, 649b38f0970Sck uint64_t *id, uint64_t *offp, boolean_t *case_conflict); 650ab04eb8eStimh extern int dmu_snapshot_realname(objset_t *os, char *name, char *real, 651ab04eb8eStimh int maxlen, boolean_t *conflict); 65287e5029aSahrens extern int dmu_dir_list_next(objset_t *os, int namelen, char *name, 65387e5029aSahrens uint64_t *idp, uint64_t *offp); 65414843421SMatthew Ahrens 6559966ca11SMatthew Ahrens typedef int objset_used_cb_t(dmu_object_type_t bonustype, 6569966ca11SMatthew Ahrens void *bonus, uint64_t *userp, uint64_t *groupp); 65714843421SMatthew Ahrens extern void dmu_objset_register_type(dmu_objset_type_t ost, 65814843421SMatthew Ahrens objset_used_cb_t *cb); 659f18faf3fSek extern void dmu_objset_set_user(objset_t *os, void *user_ptr); 660f18faf3fSek extern void *dmu_objset_get_user(objset_t *os); 661fa9e4066Sahrens 662fa9e4066Sahrens /* 663fa9e4066Sahrens * Return the txg number for the given assigned transaction. 664fa9e4066Sahrens */ 66587e5029aSahrens uint64_t dmu_tx_get_txg(dmu_tx_t *tx); 666fa9e4066Sahrens 667fa9e4066Sahrens /* 668fa9e4066Sahrens * Synchronous write. 669c5c6ffa0Smaybee * If a parent zio is provided this function initiates a write on the 670c5c6ffa0Smaybee * provided buffer as a child of the parent zio. 671da6c28aaSamw * In the absence of a parent zio, the write is completed synchronously. 672c5c6ffa0Smaybee * At write completion, blk is filled with the bp of the written block. 673fa9e4066Sahrens * Note that while the data covered by this function will be on stable 674c5c6ffa0Smaybee * storage when the write completes this new data does not become a 675fa9e4066Sahrens * permanent part of the file until the associated transaction commits. 676fa9e4066Sahrens */ 677b24ab676SJeff Bonwick 678b24ab676SJeff Bonwick /* 679b24ab676SJeff Bonwick * {zfs,zvol,ztest}_get_done() args 680b24ab676SJeff Bonwick */ 681b24ab676SJeff Bonwick typedef struct zgd { 682b24ab676SJeff Bonwick struct zilog *zgd_zilog; 683b24ab676SJeff Bonwick struct blkptr *zgd_bp; 684b24ab676SJeff Bonwick dmu_buf_t *zgd_db; 685b24ab676SJeff Bonwick struct rl *zgd_rl; 686b24ab676SJeff Bonwick void *zgd_private; 687b24ab676SJeff Bonwick } zgd_t; 688b24ab676SJeff Bonwick 689b24ab676SJeff Bonwick typedef void dmu_sync_cb_t(zgd_t *arg, int error); 690b24ab676SJeff Bonwick int dmu_sync(struct zio *zio, uint64_t txg, dmu_sync_cb_t *done, zgd_t *zgd); 691fa9e4066Sahrens 692fa9e4066Sahrens /* 693fa9e4066Sahrens * Find the next hole or data block in file starting at *off 694fa9e4066Sahrens * Return found offset in *off. Return ESRCH for end of file. 695fa9e4066Sahrens */ 696fa9e4066Sahrens int dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole, 697fa9e4066Sahrens uint64_t *off); 698fa9e4066Sahrens 699fa9e4066Sahrens /* 700fa9e4066Sahrens * Initial setup and final teardown. 701fa9e4066Sahrens */ 702fa9e4066Sahrens extern void dmu_init(void); 703fa9e4066Sahrens extern void dmu_fini(void); 704fa9e4066Sahrens 705fa9e4066Sahrens typedef void (*dmu_traverse_cb_t)(objset_t *os, void *arg, struct blkptr *bp, 706fa9e4066Sahrens uint64_t object, uint64_t offset, int len); 707fa9e4066Sahrens void dmu_traverse_objset(objset_t *os, uint64_t txg_start, 708fa9e4066Sahrens dmu_traverse_cb_t cb, void *arg); 709fa9e4066Sahrens 7103cb34c60Sahrens int dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, 7113cb34c60Sahrens struct vnode *vp, offset_t *off); 7123cb34c60Sahrens 7133cb34c60Sahrens typedef struct dmu_recv_cookie { 7143cb34c60Sahrens /* 7153cb34c60Sahrens * This structure is opaque! 7163cb34c60Sahrens * 7173cb34c60Sahrens * If logical and real are different, we are recving the stream 7183cb34c60Sahrens * into the "real" temporary clone, and then switching it with 7193cb34c60Sahrens * the "logical" target. 7203cb34c60Sahrens */ 7213cb34c60Sahrens struct dsl_dataset *drc_logical_ds; 7223cb34c60Sahrens struct dsl_dataset *drc_real_ds; 7233cb34c60Sahrens struct drr_begin *drc_drrb; 7243cb34c60Sahrens char *drc_tosnap; 7259e69d7d0SLori Alt char *drc_top_ds; 7263cb34c60Sahrens boolean_t drc_newfs; 7273cb34c60Sahrens boolean_t drc_force; 7283cb34c60Sahrens } dmu_recv_cookie_t; 7293cb34c60Sahrens 7309e69d7d0SLori Alt int dmu_recv_begin(char *tofs, char *tosnap, char *topds, struct drr_begin *, 731f4b94bdeSMatthew Ahrens boolean_t force, objset_t *origin, dmu_recv_cookie_t *); 7323cb34c60Sahrens int dmu_recv_stream(dmu_recv_cookie_t *drc, struct vnode *vp, offset_t *voffp); 7333cb34c60Sahrens int dmu_recv_end(dmu_recv_cookie_t *drc); 734fa9e4066Sahrens 735fa9e4066Sahrens /* CRC64 table */ 736fa9e4066Sahrens #define ZFS_CRC64_POLY 0xC96C5795D7870F42ULL /* ECMA-182, reflected form */ 737fa9e4066Sahrens extern uint64_t zfs_crc64_table[256]; 738fa9e4066Sahrens 739fa9e4066Sahrens #ifdef __cplusplus 740fa9e4066Sahrens } 741fa9e4066Sahrens #endif 742fa9e4066Sahrens 743fa9e4066Sahrens #endif /* _SYS_DMU_H */ 744