spa.h revision 207672
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21/* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26#ifndef _SYS_SPA_H 27#define _SYS_SPA_H 28 29#include <sys/avl.h> 30#include <sys/zfs_context.h> 31#include <sys/nvpair.h> 32#include <sys/sysmacros.h> 33#include <sys/types.h> 34#include <sys/fs/zfs.h> 35 36#ifdef __cplusplus 37extern "C" { 38#endif 39 40/* 41 * Forward references that lots of things need. 42 */ 43typedef struct spa spa_t; 44typedef struct vdev vdev_t; 45typedef struct metaslab metaslab_t; 46typedef struct zilog zilog_t; 47typedef struct traverse_handle traverse_handle_t; 48typedef struct spa_aux_vdev spa_aux_vdev_t; 49struct dsl_pool; 50 51/* 52 * General-purpose 32-bit and 64-bit bitfield encodings. 53 */ 54#define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) 55#define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) 56#define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) 57#define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) 58 59#define BF32_GET(x, low, len) BF32_DECODE(x, low, len) 60#define BF64_GET(x, low, len) BF64_DECODE(x, low, len) 61 62#define BF32_SET(x, low, len, val) \ 63 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len)) 64#define BF64_SET(x, low, len, val) \ 65 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)) 66 67#define BF32_GET_SB(x, low, len, shift, bias) \ 68 ((BF32_GET(x, low, len) + (bias)) << (shift)) 69#define BF64_GET_SB(x, low, len, shift, bias) \ 70 ((BF64_GET(x, low, len) + (bias)) << (shift)) 71 72#define BF32_SET_SB(x, low, len, shift, bias, val) \ 73 BF32_SET(x, low, len, ((val) >> (shift)) - (bias)) 74#define BF64_SET_SB(x, low, len, shift, bias, val) \ 75 BF64_SET(x, low, len, ((val) >> (shift)) - (bias)) 76 77/* 78 * We currently support nine block sizes, from 512 bytes to 128K. 79 * We could go higher, but the benefits are near-zero and the cost 80 * of COWing a giant block to modify one byte would become excessive. 81 */ 82#define SPA_MINBLOCKSHIFT 9 83#define SPA_MAXBLOCKSHIFT 17 84#define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) 85#define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) 86 87#define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1) 88 89/* 90 * Size of block to hold the configuration data (a packed nvlist) 91 */ 92#define SPA_CONFIG_BLOCKSIZE (1 << 14) 93 94/* 95 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. 96 * The ASIZE encoding should be at least 64 times larger (6 more bits) 97 * to support up to 4-way RAID-Z mirror mode with worst-case gang block 98 * overhead, three DVAs per bp, plus one more bit in case we do anything 99 * else that expands the ASIZE. 100 */ 101#define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ 102#define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ 103#define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ 104 105/* 106 * All SPA data is represented by 128-bit data virtual addresses (DVAs). 107 * The members of the dva_t should be considered opaque outside the SPA. 108 */ 109typedef struct dva { 110 uint64_t dva_word[2]; 111} dva_t; 112 113/* 114 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 115 */ 116typedef struct zio_cksum { 117 uint64_t zc_word[4]; 118} zio_cksum_t; 119 120/* 121 * Each block is described by its DVAs, time of birth, checksum, etc. 122 * The word-by-word, bit-by-bit layout of the blkptr is as follows: 123 * 124 * 64 56 48 40 32 24 16 8 0 125 * +-------+-------+-------+-------+-------+-------+-------+-------+ 126 * 0 | vdev1 | GRID | ASIZE | 127 * +-------+-------+-------+-------+-------+-------+-------+-------+ 128 * 1 |G| offset1 | 129 * +-------+-------+-------+-------+-------+-------+-------+-------+ 130 * 2 | vdev2 | GRID | ASIZE | 131 * +-------+-------+-------+-------+-------+-------+-------+-------+ 132 * 3 |G| offset2 | 133 * +-------+-------+-------+-------+-------+-------+-------+-------+ 134 * 4 | vdev3 | GRID | ASIZE | 135 * +-------+-------+-------+-------+-------+-------+-------+-------+ 136 * 5 |G| offset3 | 137 * +-------+-------+-------+-------+-------+-------+-------+-------+ 138 * 6 |E| lvl | type | cksum | comp | PSIZE | LSIZE | 139 * +-------+-------+-------+-------+-------+-------+-------+-------+ 140 * 7 | padding | 141 * +-------+-------+-------+-------+-------+-------+-------+-------+ 142 * 8 | padding | 143 * +-------+-------+-------+-------+-------+-------+-------+-------+ 144 * 9 | padding | 145 * +-------+-------+-------+-------+-------+-------+-------+-------+ 146 * a | birth txg | 147 * +-------+-------+-------+-------+-------+-------+-------+-------+ 148 * b | fill count | 149 * +-------+-------+-------+-------+-------+-------+-------+-------+ 150 * c | checksum[0] | 151 * +-------+-------+-------+-------+-------+-------+-------+-------+ 152 * d | checksum[1] | 153 * +-------+-------+-------+-------+-------+-------+-------+-------+ 154 * e | checksum[2] | 155 * +-------+-------+-------+-------+-------+-------+-------+-------+ 156 * f | checksum[3] | 157 * +-------+-------+-------+-------+-------+-------+-------+-------+ 158 * 159 * Legend: 160 * 161 * vdev virtual device ID 162 * offset offset into virtual device 163 * LSIZE logical size 164 * PSIZE physical size (after compression) 165 * ASIZE allocated size (including RAID-Z parity and gang block headers) 166 * GRID RAID-Z layout information (reserved for future use) 167 * cksum checksum function 168 * comp compression function 169 * G gang block indicator 170 * E endianness 171 * type DMU object type 172 * lvl level of indirection 173 * birth txg transaction group in which the block was born 174 * fill count number of non-zero blocks under this bp 175 * checksum[4] 256-bit checksum of the data this bp describes 176 */ 177typedef struct blkptr { 178 dva_t blk_dva[3]; /* 128-bit Data Virtual Address */ 179 uint64_t blk_prop; /* size, compression, type, etc */ 180 uint64_t blk_pad[3]; /* Extra space for the future */ 181 uint64_t blk_birth; /* transaction group at birth */ 182 uint64_t blk_fill; /* fill count */ 183 zio_cksum_t blk_cksum; /* 256-bit checksum */ 184} blkptr_t; 185 186#define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */ 187#define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */ 188 189/* 190 * Macros to get and set fields in a bp or DVA. 191 */ 192#define DVA_GET_ASIZE(dva) \ 193 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0) 194#define DVA_SET_ASIZE(dva, x) \ 195 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x) 196 197#define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) 198#define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) 199 200#define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) 201#define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) 202 203#define DVA_GET_OFFSET(dva) \ 204 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) 205#define DVA_SET_OFFSET(dva, x) \ 206 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) 207 208#define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) 209#define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) 210 211#define BP_GET_LSIZE(bp) \ 212 (BP_IS_HOLE(bp) ? 0 : \ 213 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)) 214#define BP_SET_LSIZE(bp, x) \ 215 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x) 216 217#define BP_GET_PSIZE(bp) \ 218 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1) 219#define BP_SET_PSIZE(bp, x) \ 220 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x) 221 222#define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8) 223#define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x) 224 225#define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8) 226#define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x) 227 228#define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) 229#define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) 230 231#define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) 232#define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) 233 234#define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1)) 235#define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) 236 237#define BP_GET_ASIZE(bp) \ 238 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 239 DVA_GET_ASIZE(&(bp)->blk_dva[2])) 240 241#define BP_GET_UCSIZE(bp) \ 242 ((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \ 243 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp)); 244 245#define BP_GET_NDVAS(bp) \ 246 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ 247 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 248 !!DVA_GET_ASIZE(&(bp)->blk_dva[2])) 249 250#define BP_COUNT_GANG(bp) \ 251 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \ 252 DVA_GET_GANG(&(bp)->blk_dva[1]) + \ 253 DVA_GET_GANG(&(bp)->blk_dva[2])) 254 255#define DVA_EQUAL(dva1, dva2) \ 256 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ 257 (dva1)->dva_word[0] == (dva2)->dva_word[0]) 258 259#define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ 260 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ 261 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ 262 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ 263 ((zc1).zc_word[3] - (zc2).zc_word[3]))) 264 265#define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) 266 267#define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 268{ \ 269 (zcp)->zc_word[0] = w0; \ 270 (zcp)->zc_word[1] = w1; \ 271 (zcp)->zc_word[2] = w2; \ 272 (zcp)->zc_word[3] = w3; \ 273} 274 275#define BP_IDENTITY(bp) (&(bp)->blk_dva[0]) 276#define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp)) 277#define BP_IS_HOLE(bp) ((bp)->blk_birth == 0) 278#define BP_IS_OLDER(bp, txg) (!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg)) 279 280#define BP_ZERO(bp) \ 281{ \ 282 (bp)->blk_dva[0].dva_word[0] = 0; \ 283 (bp)->blk_dva[0].dva_word[1] = 0; \ 284 (bp)->blk_dva[1].dva_word[0] = 0; \ 285 (bp)->blk_dva[1].dva_word[1] = 0; \ 286 (bp)->blk_dva[2].dva_word[0] = 0; \ 287 (bp)->blk_dva[2].dva_word[1] = 0; \ 288 (bp)->blk_prop = 0; \ 289 (bp)->blk_pad[0] = 0; \ 290 (bp)->blk_pad[1] = 0; \ 291 (bp)->blk_pad[2] = 0; \ 292 (bp)->blk_birth = 0; \ 293 (bp)->blk_fill = 0; \ 294 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ 295} 296 297#define BLK_FILL_ALREADY_FREED (-1ULL) 298 299/* 300 * Note: the byteorder is either 0 or -1, both of which are palindromes. 301 * This simplifies the endianness handling a bit. 302 */ 303#if BYTE_ORDER == _BIG_ENDIAN 304#define ZFS_HOST_BYTEORDER (0ULL) 305#else 306#define ZFS_HOST_BYTEORDER (-1ULL) 307#endif 308 309#define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER) 310 311#define BP_SPRINTF_LEN 320 312 313#include <sys/dmu.h> 314 315#define BP_GET_BUFC_TYPE(bp) \ 316 (((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \ 317 ARC_BUFC_METADATA : ARC_BUFC_DATA); 318/* 319 * Routines found in spa.c 320 */ 321 322/* state manipulation functions */ 323extern int spa_open(const char *pool, spa_t **, void *tag); 324extern int spa_get_stats(const char *pool, nvlist_t **config, 325 char *altroot, size_t buflen); 326extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props, 327 const char *history_str, nvlist_t *zplprops); 328extern int spa_check_rootconf(char *devpath, char *devid, 329 nvlist_t **bestconf, uint64_t *besttxg); 330extern boolean_t spa_rootdev_validate(nvlist_t *nv); 331extern int spa_import_rootpool(char *devpath, char *devid); 332extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props); 333extern int spa_import_faulted(const char *, nvlist_t *, nvlist_t *); 334extern nvlist_t *spa_tryimport(nvlist_t *tryconfig); 335extern int spa_destroy(char *pool); 336extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 337 boolean_t hardforce); 338extern int spa_reset(char *pool); 339extern void spa_async_request(spa_t *spa, int flag); 340extern void spa_async_unrequest(spa_t *spa, int flag); 341extern void spa_async_suspend(spa_t *spa); 342extern void spa_async_resume(spa_t *spa); 343extern spa_t *spa_inject_addref(char *pool); 344extern void spa_inject_delref(spa_t *spa); 345 346#define SPA_ASYNC_CONFIG_UPDATE 0x01 347#define SPA_ASYNC_REMOVE 0x02 348#define SPA_ASYNC_PROBE 0x04 349#define SPA_ASYNC_RESILVER_DONE 0x08 350#define SPA_ASYNC_RESILVER 0x10 351 352/* device manipulation */ 353extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot); 354extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, 355 int replacing); 356extern int spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done); 357extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare); 358extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath); 359 360/* spare state (which is global across all pools) */ 361extern void spa_spare_add(vdev_t *vd); 362extern void spa_spare_remove(vdev_t *vd); 363extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt); 364extern void spa_spare_activate(vdev_t *vd); 365 366/* L2ARC state (which is global across all pools) */ 367extern void spa_l2cache_add(vdev_t *vd); 368extern void spa_l2cache_remove(vdev_t *vd); 369extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool); 370extern void spa_l2cache_activate(vdev_t *vd); 371extern void spa_l2cache_drop(spa_t *spa); 372extern void spa_l2cache_space_update(vdev_t *vd, int64_t space, int64_t alloc); 373 374/* scrubbing */ 375extern int spa_scrub(spa_t *spa, pool_scrub_type_t type); 376 377/* spa syncing */ 378extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */ 379extern void spa_sync_allpools(void); 380 381/* spa namespace global mutex */ 382extern kmutex_t spa_namespace_lock; 383 384/* 385 * SPA configuration functions in spa_config.c 386 */ 387 388#define SPA_CONFIG_UPDATE_POOL 0 389#define SPA_CONFIG_UPDATE_VDEVS 1 390 391extern void spa_config_sync(spa_t *, boolean_t, boolean_t); 392extern void spa_config_load(void); 393extern nvlist_t *spa_all_configs(uint64_t *); 394extern void spa_config_set(spa_t *spa, nvlist_t *config); 395extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, 396 int getstats); 397extern void spa_config_update(spa_t *spa, int what); 398extern void spa_config_update_common(spa_t *spa, int what, boolean_t isroot); 399 400/* 401 * Miscellaneous SPA routines in spa_misc.c 402 */ 403 404/* Namespace manipulation */ 405extern spa_t *spa_lookup(const char *name); 406extern spa_t *spa_add(const char *name, const char *altroot); 407extern void spa_remove(spa_t *spa); 408extern spa_t *spa_next(spa_t *prev); 409 410/* Refcount functions */ 411extern void spa_open_ref(spa_t *spa, void *tag); 412extern void spa_close(spa_t *spa, void *tag); 413extern boolean_t spa_refcount_zero(spa_t *spa); 414 415#define SCL_CONFIG 0x01 416#define SCL_STATE 0x02 417#define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */ 418#define SCL_ALLOC 0x08 419#define SCL_ZIO 0x10 420#define SCL_FREE 0x20 421#define SCL_VDEV 0x40 422#define SCL_LOCKS 7 423#define SCL_ALL ((1 << SCL_LOCKS) - 1) 424#define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO) 425 426/* Pool configuration locks */ 427extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw); 428extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw); 429extern void spa_config_exit(spa_t *spa, int locks, void *tag); 430extern int spa_config_held(spa_t *spa, int locks, krw_t rw); 431 432/* Pool vdev add/remove lock */ 433extern uint64_t spa_vdev_enter(spa_t *spa); 434extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error); 435 436/* Pool vdev state change lock */ 437extern void spa_vdev_state_enter(spa_t *spa); 438extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error); 439 440/* Accessor functions */ 441extern krwlock_t *spa_traverse_rwlock(spa_t *spa); 442extern boolean_t spa_traverse_wanted(spa_t *spa); 443extern struct dsl_pool *spa_get_dsl(spa_t *spa); 444extern blkptr_t *spa_get_rootblkptr(spa_t *spa); 445extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp); 446extern void spa_altroot(spa_t *, char *, size_t); 447extern int spa_sync_pass(spa_t *spa); 448extern char *spa_name(spa_t *spa); 449extern uint64_t spa_guid(spa_t *spa); 450extern uint64_t spa_last_synced_txg(spa_t *spa); 451extern uint64_t spa_first_txg(spa_t *spa); 452extern uint64_t spa_version(spa_t *spa); 453extern int spa_state(spa_t *spa); 454extern uint64_t spa_freeze_txg(spa_t *spa); 455extern uint64_t spa_get_alloc(spa_t *spa); 456extern uint64_t spa_get_space(spa_t *spa); 457extern uint64_t spa_get_dspace(spa_t *spa); 458extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize); 459extern uint64_t spa_version(spa_t *spa); 460extern int spa_max_replication(spa_t *spa); 461extern int spa_busy(void); 462extern uint8_t spa_get_failmode(spa_t *spa); 463extern boolean_t spa_suspended(spa_t *spa); 464 465/* Miscellaneous support routines */ 466extern int spa_rename(const char *oldname, const char *newname); 467extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid); 468extern char *spa_strdup(const char *); 469extern void spa_strfree(char *); 470extern uint64_t spa_get_random(uint64_t range); 471extern void sprintf_blkptr(char *buf, int len, const blkptr_t *bp); 472extern void spa_freeze(spa_t *spa); 473extern void spa_upgrade(spa_t *spa, uint64_t version); 474extern void spa_evict_all(void); 475extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid, 476 boolean_t l2cache); 477extern boolean_t spa_has_spare(spa_t *, uint64_t guid); 478extern uint64_t bp_get_dasize(spa_t *spa, const blkptr_t *bp); 479extern boolean_t spa_has_slogs(spa_t *spa); 480extern boolean_t spa_is_root(spa_t *spa); 481 482/* history logging */ 483typedef enum history_log_type { 484 LOG_CMD_POOL_CREATE, 485 LOG_CMD_NORMAL, 486 LOG_INTERNAL 487} history_log_type_t; 488 489typedef struct history_arg { 490 const char *ha_history_str; 491 history_log_type_t ha_log_type; 492 history_internal_events_t ha_event; 493 char ha_zone[MAXPATHLEN]; 494} history_arg_t; 495 496extern char *spa_his_ievent_table[]; 497 498extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx); 499extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read, 500 char *his_buf); 501extern int spa_history_log(spa_t *spa, const char *his_buf, 502 history_log_type_t what); 503void spa_history_internal_log(history_internal_events_t event, spa_t *spa, 504 dmu_tx_t *tx, cred_t *cr, const char *fmt, ...); 505 506/* error handling */ 507struct zbookmark; 508struct zio; 509extern void spa_log_error(spa_t *spa, struct zio *zio); 510extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd, 511 struct zio *zio, uint64_t stateoroffset, uint64_t length); 512extern void zfs_post_remove(spa_t *spa, vdev_t *vd); 513extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd); 514extern uint64_t spa_get_errlog_size(spa_t *spa); 515extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count); 516extern void spa_errlog_rotate(spa_t *spa); 517extern void spa_errlog_drain(spa_t *spa); 518extern void spa_errlog_sync(spa_t *spa, uint64_t txg); 519extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub); 520 521/* vdev cache */ 522extern void vdev_cache_stat_init(void); 523extern void vdev_cache_stat_fini(void); 524 525/* Initialization and termination */ 526extern void spa_init(int flags); 527extern void spa_fini(void); 528extern void spa_boot_init(); 529 530/* properties */ 531extern int spa_prop_set(spa_t *spa, nvlist_t *nvp); 532extern int spa_prop_get(spa_t *spa, nvlist_t **nvp); 533extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx); 534 535/* asynchronous event notification */ 536extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name); 537 538#ifdef ZFS_DEBUG 539#define dprintf_bp(bp, fmt, ...) do { \ 540 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 541 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \ 542 sprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \ 543 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \ 544 kmem_free(__blkbuf, BP_SPRINTF_LEN); \ 545 } \ 546_NOTE(CONSTCOND) } while (0) 547#else 548#define dprintf_bp(bp, fmt, ...) 549#endif 550 551extern int spa_mode; /* mode, e.g. FREAD | FWRITE */ 552 553#ifdef __cplusplus 554} 555#endif 556 557#endif /* _SYS_SPA_H */ 558