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 */ 21c9431fa1Sahl 22fa9e4066Sahrens /* 23c7cd2421SGeorge Wilson * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #ifndef _ZIO_H 27fa9e4066Sahrens #define _ZIO_H 28fa9e4066Sahrens 29fa9e4066Sahrens #include <sys/zfs_context.h> 30fa9e4066Sahrens #include <sys/spa.h> 31fa9e4066Sahrens #include <sys/txg.h> 32fa9e4066Sahrens #include <sys/avl.h> 33fa9e4066Sahrens #include <sys/fs/zfs.h> 3444cd46caSbillm #include <sys/zio_impl.h> 35fa9e4066Sahrens 36fa9e4066Sahrens #ifdef __cplusplus 37fa9e4066Sahrens extern "C" { 38fa9e4066Sahrens #endif 39fa9e4066Sahrens 406e1f5caaSNeil Perrin /* 416e1f5caaSNeil Perrin * Embedded checksum 426e1f5caaSNeil Perrin */ 436e1f5caaSNeil Perrin #define ZEC_MAGIC 0x210da7ab10c7a11ULL 44fa9e4066Sahrens 456e1f5caaSNeil Perrin typedef struct zio_eck { 466e1f5caaSNeil Perrin uint64_t zec_magic; /* for validation, endianness */ 476e1f5caaSNeil Perrin zio_cksum_t zec_cksum; /* 256-bit checksum */ 486e1f5caaSNeil Perrin } zio_eck_t; 49fa9e4066Sahrens 50fa9e4066Sahrens /* 51fa9e4066Sahrens * Gang block headers are self-checksumming and contain an array 52fa9e4066Sahrens * of block pointers. 53fa9e4066Sahrens */ 54fa9e4066Sahrens #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 55fa9e4066Sahrens #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 566e1f5caaSNeil Perrin sizeof (zio_eck_t)) / sizeof (blkptr_t)) 57fa9e4066Sahrens #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 586e1f5caaSNeil Perrin sizeof (zio_eck_t) - \ 59fa9e4066Sahrens (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 60fa9e4066Sahrens sizeof (uint64_t)) 61fa9e4066Sahrens 62fa9e4066Sahrens typedef struct zio_gbh { 63fa9e4066Sahrens blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 64fa9e4066Sahrens uint64_t zg_filler[SPA_GBH_FILLER]; 656e1f5caaSNeil Perrin zio_eck_t zg_tail; 66fa9e4066Sahrens } zio_gbh_phys_t; 67fa9e4066Sahrens 68fa9e4066Sahrens enum zio_checksum { 69fa9e4066Sahrens ZIO_CHECKSUM_INHERIT = 0, 70fa9e4066Sahrens ZIO_CHECKSUM_ON, 71fa9e4066Sahrens ZIO_CHECKSUM_OFF, 72fa9e4066Sahrens ZIO_CHECKSUM_LABEL, 73fa9e4066Sahrens ZIO_CHECKSUM_GANG_HEADER, 74fa9e4066Sahrens ZIO_CHECKSUM_ZILOG, 75fa9e4066Sahrens ZIO_CHECKSUM_FLETCHER_2, 76fa9e4066Sahrens ZIO_CHECKSUM_FLETCHER_4, 77fa9e4066Sahrens ZIO_CHECKSUM_SHA256, 786e1f5caaSNeil Perrin ZIO_CHECKSUM_ZILOG2, 79fa9e4066Sahrens ZIO_CHECKSUM_FUNCTIONS 80fa9e4066Sahrens }; 81fa9e4066Sahrens 827e322df5SJonathan Adams #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 83fa9e4066Sahrens #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 84fa9e4066Sahrens 85b24ab676SJeff Bonwick #define ZIO_CHECKSUM_MASK 0xffULL 86b24ab676SJeff Bonwick #define ZIO_CHECKSUM_VERIFY (1 << 8) 87b24ab676SJeff Bonwick 88b24ab676SJeff Bonwick #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 89b24ab676SJeff Bonwick #define ZIO_DEDUPDITTO_MIN 100 90b24ab676SJeff Bonwick 91fa9e4066Sahrens enum zio_compress { 92fa9e4066Sahrens ZIO_COMPRESS_INHERIT = 0, 93fa9e4066Sahrens ZIO_COMPRESS_ON, 94fa9e4066Sahrens ZIO_COMPRESS_OFF, 95fa9e4066Sahrens ZIO_COMPRESS_LZJB, 96416e0cd8Sek ZIO_COMPRESS_EMPTY, 97c9431fa1Sahl ZIO_COMPRESS_GZIP_1, 98c9431fa1Sahl ZIO_COMPRESS_GZIP_2, 99c9431fa1Sahl ZIO_COMPRESS_GZIP_3, 100c9431fa1Sahl ZIO_COMPRESS_GZIP_4, 101c9431fa1Sahl ZIO_COMPRESS_GZIP_5, 102c9431fa1Sahl ZIO_COMPRESS_GZIP_6, 103c9431fa1Sahl ZIO_COMPRESS_GZIP_7, 104c9431fa1Sahl ZIO_COMPRESS_GZIP_8, 105c9431fa1Sahl ZIO_COMPRESS_GZIP_9, 106b24ab676SJeff Bonwick ZIO_COMPRESS_ZLE, 107fa9e4066Sahrens ZIO_COMPRESS_FUNCTIONS 108fa9e4066Sahrens }; 109fa9e4066Sahrens 110fa9e4066Sahrens #define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB 111fa9e4066Sahrens #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF 112fa9e4066Sahrens 113b24ab676SJeff Bonwick #define BOOTFS_COMPRESS_VALID(compress) \ 114b24ab676SJeff Bonwick ((compress) == ZIO_COMPRESS_LZJB || \ 115b24ab676SJeff Bonwick ((compress) == ZIO_COMPRESS_ON && \ 116b24ab676SJeff Bonwick ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \ 117b24ab676SJeff Bonwick (compress) == ZIO_COMPRESS_OFF) 118b24ab676SJeff Bonwick 1190a4e9518Sgw #define ZIO_FAILURE_MODE_WAIT 0 1200a4e9518Sgw #define ZIO_FAILURE_MODE_CONTINUE 1 1210a4e9518Sgw #define ZIO_FAILURE_MODE_PANIC 2 1220a4e9518Sgw 123fa9e4066Sahrens #define ZIO_PRIORITY_NOW (zio_priority_table[0]) 124fa9e4066Sahrens #define ZIO_PRIORITY_SYNC_READ (zio_priority_table[1]) 125fa9e4066Sahrens #define ZIO_PRIORITY_SYNC_WRITE (zio_priority_table[2]) 12680eb36f2SGeorge Wilson #define ZIO_PRIORITY_LOG_WRITE (zio_priority_table[3]) 12780eb36f2SGeorge Wilson #define ZIO_PRIORITY_CACHE_FILL (zio_priority_table[4]) 12880eb36f2SGeorge Wilson #define ZIO_PRIORITY_AGG (zio_priority_table[5]) 12980eb36f2SGeorge Wilson #define ZIO_PRIORITY_FREE (zio_priority_table[6]) 13080eb36f2SGeorge Wilson #define ZIO_PRIORITY_ASYNC_WRITE (zio_priority_table[7]) 13180eb36f2SGeorge Wilson #define ZIO_PRIORITY_ASYNC_READ (zio_priority_table[8]) 13280eb36f2SGeorge Wilson #define ZIO_PRIORITY_RESILVER (zio_priority_table[9]) 13380eb36f2SGeorge Wilson #define ZIO_PRIORITY_SCRUB (zio_priority_table[10]) 134c7cd2421SGeorge Wilson #define ZIO_PRIORITY_DDT_PREFETCH (zio_priority_table[11]) 135c7cd2421SGeorge Wilson #define ZIO_PRIORITY_TABLE_SIZE 12 136fa9e4066Sahrens 137e05725b1Sbonwick #define ZIO_PIPELINE_CONTINUE 0x100 138e05725b1Sbonwick #define ZIO_PIPELINE_STOP 0x101 139e05725b1Sbonwick 140b24ab676SJeff Bonwick enum zio_flag { 141b24ab676SJeff Bonwick /* 142b24ab676SJeff Bonwick * Flags inherited by gang, ddt, and vdev children, 143b24ab676SJeff Bonwick * and that must be equal for two zios to aggregate 144b24ab676SJeff Bonwick */ 145b24ab676SJeff Bonwick ZIO_FLAG_DONT_AGGREGATE = 1 << 0, 146b24ab676SJeff Bonwick ZIO_FLAG_IO_REPAIR = 1 << 1, 147b24ab676SJeff Bonwick ZIO_FLAG_SELF_HEAL = 1 << 2, 148b24ab676SJeff Bonwick ZIO_FLAG_RESILVER = 1 << 3, 149b24ab676SJeff Bonwick ZIO_FLAG_SCRUB = 1 << 4, 150*44ecc532SGeorge Wilson ZIO_FLAG_SCAN_THREAD = 1 << 5, 151b24ab676SJeff Bonwick 152b24ab676SJeff Bonwick #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) 153b24ab676SJeff Bonwick 154b24ab676SJeff Bonwick /* 155b24ab676SJeff Bonwick * Flags inherited by ddt, gang, and vdev children. 156b24ab676SJeff Bonwick */ 157b24ab676SJeff Bonwick ZIO_FLAG_CANFAIL = 1 << 6, /* must be first for INHERIT */ 158b24ab676SJeff Bonwick ZIO_FLAG_SPECULATIVE = 1 << 7, 159b24ab676SJeff Bonwick ZIO_FLAG_CONFIG_WRITER = 1 << 8, 160b24ab676SJeff Bonwick ZIO_FLAG_DONT_RETRY = 1 << 9, 161b24ab676SJeff Bonwick ZIO_FLAG_DONT_CACHE = 1 << 10, 162b24ab676SJeff Bonwick ZIO_FLAG_NODATA = 1 << 11, 163b24ab676SJeff Bonwick ZIO_FLAG_INDUCE_DAMAGE = 1 << 12, 164b24ab676SJeff Bonwick 165b24ab676SJeff Bonwick #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) 166b24ab676SJeff Bonwick #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) 167b24ab676SJeff Bonwick 168b24ab676SJeff Bonwick /* 169b24ab676SJeff Bonwick * Flags inherited by vdev children. 170b24ab676SJeff Bonwick */ 171b24ab676SJeff Bonwick ZIO_FLAG_IO_RETRY = 1 << 13, /* must be first for INHERIT */ 172b24ab676SJeff Bonwick ZIO_FLAG_PROBE = 1 << 14, 173b24ab676SJeff Bonwick ZIO_FLAG_TRYHARD = 1 << 15, 174b24ab676SJeff Bonwick ZIO_FLAG_OPTIONAL = 1 << 16, 175b24ab676SJeff Bonwick 176b24ab676SJeff Bonwick #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) 177b24ab676SJeff Bonwick 178b24ab676SJeff Bonwick /* 179b24ab676SJeff Bonwick * Flags not inherited by any children. 180b24ab676SJeff Bonwick */ 181b24ab676SJeff Bonwick ZIO_FLAG_DONT_QUEUE = 1 << 17, /* must be first for INHERIT */ 182b24ab676SJeff Bonwick ZIO_FLAG_DONT_PROPAGATE = 1 << 18, 183b24ab676SJeff Bonwick ZIO_FLAG_IO_BYPASS = 1 << 19, 184b24ab676SJeff Bonwick ZIO_FLAG_IO_REWRITE = 1 << 20, 185b24ab676SJeff Bonwick ZIO_FLAG_RAW = 1 << 21, 186b24ab676SJeff Bonwick ZIO_FLAG_GANG_CHILD = 1 << 22, 187b24ab676SJeff Bonwick ZIO_FLAG_DDT_CHILD = 1 << 23, 188b24ab676SJeff Bonwick ZIO_FLAG_GODFATHER = 1 << 24 189b24ab676SJeff Bonwick }; 190b24ab676SJeff Bonwick 191b24ab676SJeff Bonwick #define ZIO_FLAG_MUSTSUCCEED 0 192b24ab676SJeff Bonwick 193b24ab676SJeff Bonwick #define ZIO_DDT_CHILD_FLAGS(zio) \ 194b24ab676SJeff Bonwick (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ 195b24ab676SJeff Bonwick ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) 196b24ab676SJeff Bonwick 197e14bb325SJeff Bonwick #define ZIO_GANG_CHILD_FLAGS(zio) \ 198e14bb325SJeff Bonwick (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ 199e14bb325SJeff Bonwick ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) 200e14bb325SJeff Bonwick 201b24ab676SJeff Bonwick #define ZIO_VDEV_CHILD_FLAGS(zio) \ 202b24ab676SJeff Bonwick (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ 203b24ab676SJeff Bonwick ZIO_FLAG_CANFAIL) 204b24ab676SJeff Bonwick 205e14bb325SJeff Bonwick enum zio_child { 206e14bb325SJeff Bonwick ZIO_CHILD_VDEV = 0, 207e14bb325SJeff Bonwick ZIO_CHILD_GANG, 208b24ab676SJeff Bonwick ZIO_CHILD_DDT, 209e14bb325SJeff Bonwick ZIO_CHILD_LOGICAL, 210e14bb325SJeff Bonwick ZIO_CHILD_TYPES 211e14bb325SJeff Bonwick }; 212e14bb325SJeff Bonwick 213e14bb325SJeff Bonwick enum zio_wait_type { 214e14bb325SJeff Bonwick ZIO_WAIT_READY = 0, 215e14bb325SJeff Bonwick ZIO_WAIT_DONE, 216e14bb325SJeff Bonwick ZIO_WAIT_TYPES 217e14bb325SJeff Bonwick }; 218e14bb325SJeff Bonwick 219fa9e4066Sahrens /* 220e7cbe64fSgw * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent 221e7cbe64fSgw * graveyard) to indicate checksum errors and fragmentation. 222fa9e4066Sahrens */ 223fa9e4066Sahrens #define ECKSUM EBADE 224e7cbe64fSgw #define EFRAGS EBADR 225fa9e4066Sahrens 226fa9e4066Sahrens typedef void zio_done_func_t(zio_t *zio); 227fa9e4066Sahrens 228fa9e4066Sahrens extern uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE]; 229fa9e4066Sahrens extern char *zio_type_name[ZIO_TYPES]; 230fa9e4066Sahrens 231ea8dc4b6Seschrock /* 232ea8dc4b6Seschrock * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely 233ea8dc4b6Seschrock * identifies any block in the pool. By convention, the meta-objset (MOS) 234b24ab676SJeff Bonwick * is objset 0, and the meta-dnode is object 0. This covers all blocks 235b24ab676SJeff Bonwick * except root blocks and ZIL blocks, which are defined as follows: 236ea8dc4b6Seschrock * 237b24ab676SJeff Bonwick * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. 238b24ab676SJeff Bonwick * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. 239b24ab676SJeff Bonwick * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. 240ea8dc4b6Seschrock * 241b24ab676SJeff Bonwick * Note: this structure is called a bookmark because its original purpose 242b24ab676SJeff Bonwick * was to remember where to resume a pool-wide traverse. 243ea8dc4b6Seschrock * 244ea8dc4b6Seschrock * Note: this structure is passed between userland and the kernel. 245ea8dc4b6Seschrock * Therefore it must not change size or alignment between 32/64 bit 246ea8dc4b6Seschrock * compilation options. 247ea8dc4b6Seschrock */ 248ea8dc4b6Seschrock typedef struct zbookmark { 249ea8dc4b6Seschrock uint64_t zb_objset; 250ea8dc4b6Seschrock uint64_t zb_object; 251ea8dc4b6Seschrock int64_t zb_level; 252ea8dc4b6Seschrock uint64_t zb_blkid; 253ea8dc4b6Seschrock } zbookmark_t; 254ea8dc4b6Seschrock 255b24ab676SJeff Bonwick #define SET_BOOKMARK(zb, objset, object, level, blkid) \ 256b24ab676SJeff Bonwick { \ 257b24ab676SJeff Bonwick (zb)->zb_objset = objset; \ 258b24ab676SJeff Bonwick (zb)->zb_object = object; \ 259b24ab676SJeff Bonwick (zb)->zb_level = level; \ 260b24ab676SJeff Bonwick (zb)->zb_blkid = blkid; \ 261b24ab676SJeff Bonwick } 262b24ab676SJeff Bonwick 263b24ab676SJeff Bonwick #define ZB_DESTROYED_OBJSET (-1ULL) 264b24ab676SJeff Bonwick 265b24ab676SJeff Bonwick #define ZB_ROOT_OBJECT (0ULL) 266b24ab676SJeff Bonwick #define ZB_ROOT_LEVEL (-1LL) 267b24ab676SJeff Bonwick #define ZB_ROOT_BLKID (0ULL) 268b24ab676SJeff Bonwick 269b24ab676SJeff Bonwick #define ZB_ZIL_OBJECT (0ULL) 270b24ab676SJeff Bonwick #define ZB_ZIL_LEVEL (-2LL) 271b24ab676SJeff Bonwick 272e14bb325SJeff Bonwick typedef struct zio_prop { 273e14bb325SJeff Bonwick enum zio_checksum zp_checksum; 274e14bb325SJeff Bonwick enum zio_compress zp_compress; 275e14bb325SJeff Bonwick dmu_object_type_t zp_type; 276e14bb325SJeff Bonwick uint8_t zp_level; 277b24ab676SJeff Bonwick uint8_t zp_copies; 278b24ab676SJeff Bonwick uint8_t zp_dedup; 279b24ab676SJeff Bonwick uint8_t zp_dedup_verify; 280e14bb325SJeff Bonwick } zio_prop_t; 281e14bb325SJeff Bonwick 28222fe2c88SJonathan Adams typedef struct zio_cksum_report zio_cksum_report_t; 28322fe2c88SJonathan Adams 28422fe2c88SJonathan Adams typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, 28522fe2c88SJonathan Adams const void *good_data); 28622fe2c88SJonathan Adams typedef void zio_cksum_free_f(void *cbdata, size_t size); 28722fe2c88SJonathan Adams 28822fe2c88SJonathan Adams struct zio_bad_cksum; /* defined in zio_checksum.h */ 28922fe2c88SJonathan Adams 29022fe2c88SJonathan Adams struct zio_cksum_report { 29122fe2c88SJonathan Adams struct zio_cksum_report *zcr_next; 29222fe2c88SJonathan Adams nvlist_t *zcr_ereport; 29322fe2c88SJonathan Adams nvlist_t *zcr_detector; 29422fe2c88SJonathan Adams void *zcr_cbdata; 29522fe2c88SJonathan Adams size_t zcr_cbinfo; /* passed to zcr_free() */ 296b24ab676SJeff Bonwick uint64_t zcr_align; 29722fe2c88SJonathan Adams uint64_t zcr_length; 29822fe2c88SJonathan Adams zio_cksum_finish_f *zcr_finish; 29922fe2c88SJonathan Adams zio_cksum_free_f *zcr_free; 30022fe2c88SJonathan Adams 30122fe2c88SJonathan Adams /* internal use only */ 30222fe2c88SJonathan Adams struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ 30322fe2c88SJonathan Adams }; 30422fe2c88SJonathan Adams 30522fe2c88SJonathan Adams typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, 30622fe2c88SJonathan Adams void *arg); 30722fe2c88SJonathan Adams 30822fe2c88SJonathan Adams zio_vsd_cksum_report_f zio_vsd_default_cksum_report; 30922fe2c88SJonathan Adams 31022fe2c88SJonathan Adams typedef struct zio_vsd_ops { 31122fe2c88SJonathan Adams zio_done_func_t *vsd_free; 31222fe2c88SJonathan Adams zio_vsd_cksum_report_f *vsd_cksum_report; 31322fe2c88SJonathan Adams } zio_vsd_ops_t; 31422fe2c88SJonathan Adams 315e14bb325SJeff Bonwick typedef struct zio_gang_node { 316e14bb325SJeff Bonwick zio_gbh_phys_t *gn_gbh; 317e14bb325SJeff Bonwick struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; 318e14bb325SJeff Bonwick } zio_gang_node_t; 319e14bb325SJeff Bonwick 320e14bb325SJeff Bonwick typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, 321e14bb325SJeff Bonwick zio_gang_node_t *gn, void *data); 322e14bb325SJeff Bonwick 323e14bb325SJeff Bonwick typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size); 324e14bb325SJeff Bonwick 325e14bb325SJeff Bonwick typedef struct zio_transform { 326e14bb325SJeff Bonwick void *zt_orig_data; 327e14bb325SJeff Bonwick uint64_t zt_orig_size; 328e14bb325SJeff Bonwick uint64_t zt_bufsize; 329e14bb325SJeff Bonwick zio_transform_func_t *zt_transform; 330e14bb325SJeff Bonwick struct zio_transform *zt_next; 331e14bb325SJeff Bonwick } zio_transform_t; 332e14bb325SJeff Bonwick 333e14bb325SJeff Bonwick typedef int zio_pipe_stage_t(zio_t *zio); 334e14bb325SJeff Bonwick 335e14bb325SJeff Bonwick /* 336e14bb325SJeff Bonwick * The io_reexecute flags are distinct from io_flags because the child must 337e14bb325SJeff Bonwick * be able to propagate them to the parent. The normal io_flags are local 338e14bb325SJeff Bonwick * to the zio, not protected by any lock, and not modifiable by children; 339e14bb325SJeff Bonwick * the reexecute flags are protected by io_lock, modifiable by children, 340e14bb325SJeff Bonwick * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. 341e14bb325SJeff Bonwick */ 342e14bb325SJeff Bonwick #define ZIO_REEXECUTE_NOW 0x01 343e14bb325SJeff Bonwick #define ZIO_REEXECUTE_SUSPEND 0x02 344e14bb325SJeff Bonwick 345a3f829aeSBill Moore typedef struct zio_link { 346a3f829aeSBill Moore zio_t *zl_parent; 347a3f829aeSBill Moore zio_t *zl_child; 348a3f829aeSBill Moore list_node_t zl_parent_node; 349a3f829aeSBill Moore list_node_t zl_child_node; 350a3f829aeSBill Moore } zio_link_t; 351a3f829aeSBill Moore 352fa9e4066Sahrens struct zio { 353fa9e4066Sahrens /* Core information about this I/O */ 354ea8dc4b6Seschrock zbookmark_t io_bookmark; 355e14bb325SJeff Bonwick zio_prop_t io_prop; 356e14bb325SJeff Bonwick zio_type_t io_type; 357e14bb325SJeff Bonwick enum zio_child io_child_type; 358e14bb325SJeff Bonwick int io_cmd; 359e14bb325SJeff Bonwick uint8_t io_priority; 360e14bb325SJeff Bonwick uint8_t io_reexecute; 361a3f829aeSBill Moore uint8_t io_state[ZIO_WAIT_TYPES]; 362fa9e4066Sahrens uint64_t io_txg; 363e14bb325SJeff Bonwick spa_t *io_spa; 364fa9e4066Sahrens blkptr_t *io_bp; 365b24ab676SJeff Bonwick blkptr_t *io_bp_override; 366fa9e4066Sahrens blkptr_t io_bp_copy; 367a3f829aeSBill Moore list_t io_parent_list; 368a3f829aeSBill Moore list_t io_child_list; 369a3f829aeSBill Moore zio_link_t *io_walk_link; 370ea8dc4b6Seschrock zio_t *io_logical; 371e14bb325SJeff Bonwick zio_transform_t *io_transform_stack; 372fa9e4066Sahrens 373fa9e4066Sahrens /* Callback info */ 374c717a561Smaybee zio_done_func_t *io_ready; 375fa9e4066Sahrens zio_done_func_t *io_done; 376fa9e4066Sahrens void *io_private; 377b24ab676SJeff Bonwick int64_t io_prev_space_delta; /* DMU private */ 378fa9e4066Sahrens blkptr_t io_bp_orig; 379fa9e4066Sahrens 380fa9e4066Sahrens /* Data represented by this I/O */ 381fa9e4066Sahrens void *io_data; 382b24ab676SJeff Bonwick void *io_orig_data; 383fa9e4066Sahrens uint64_t io_size; 384b24ab676SJeff Bonwick uint64_t io_orig_size; 385fa9e4066Sahrens 386fa9e4066Sahrens /* Stuff for the vdev stack */ 387fa9e4066Sahrens vdev_t *io_vd; 388fa9e4066Sahrens void *io_vsd; 38922fe2c88SJonathan Adams const zio_vsd_ops_t *io_vsd_ops; 39022fe2c88SJonathan Adams 391fa9e4066Sahrens uint64_t io_offset; 392fa9e4066Sahrens uint64_t io_deadline; 393fa9e4066Sahrens avl_node_t io_offset_node; 394fa9e4066Sahrens avl_node_t io_deadline_node; 395fa9e4066Sahrens avl_tree_t *io_vdev_tree; 396fa9e4066Sahrens 397fa9e4066Sahrens /* Internal pipeline state */ 398b24ab676SJeff Bonwick enum zio_flag io_flags; 399b24ab676SJeff Bonwick enum zio_stage io_stage; 400b24ab676SJeff Bonwick enum zio_stage io_pipeline; 401b24ab676SJeff Bonwick enum zio_flag io_orig_flags; 402b24ab676SJeff Bonwick enum zio_stage io_orig_stage; 403b24ab676SJeff Bonwick enum zio_stage io_orig_pipeline; 404e14bb325SJeff Bonwick int io_error; 405e14bb325SJeff Bonwick int io_child_error[ZIO_CHILD_TYPES]; 406e14bb325SJeff Bonwick uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; 407b24ab676SJeff Bonwick uint64_t io_child_count; 408b24ab676SJeff Bonwick uint64_t io_parent_count; 409e14bb325SJeff Bonwick uint64_t *io_stall; 410f5383399SBill Moore zio_t *io_gang_leader; 411e14bb325SJeff Bonwick zio_gang_node_t *io_gang_tree; 412e14bb325SJeff Bonwick void *io_executor; 413fa9e4066Sahrens void *io_waiter; 414fa9e4066Sahrens kmutex_t io_lock; 415fa9e4066Sahrens kcondvar_t io_cv; 416ea8dc4b6Seschrock 417ea8dc4b6Seschrock /* FMA state */ 41822fe2c88SJonathan Adams zio_cksum_report_t *io_cksum_report; 419ea8dc4b6Seschrock uint64_t io_ena; 420fa9e4066Sahrens }; 421fa9e4066Sahrens 422a3f829aeSBill Moore extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, 423b24ab676SJeff Bonwick zio_done_func_t *done, void *private, enum zio_flag flags); 424fa9e4066Sahrens 425fa9e4066Sahrens extern zio_t *zio_root(spa_t *spa, 426b24ab676SJeff Bonwick zio_done_func_t *done, void *private, enum zio_flag flags); 427fa9e4066Sahrens 428088f3894Sahrens extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data, 429fa9e4066Sahrens uint64_t size, zio_done_func_t *done, void *private, 430b24ab676SJeff Bonwick int priority, enum zio_flag flags, const zbookmark_t *zb); 431fa9e4066Sahrens 432e14bb325SJeff Bonwick extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 433b24ab676SJeff Bonwick void *data, uint64_t size, const zio_prop_t *zp, 434e14bb325SJeff Bonwick zio_done_func_t *ready, zio_done_func_t *done, void *private, 435b24ab676SJeff Bonwick int priority, enum zio_flag flags, const zbookmark_t *zb); 436fa9e4066Sahrens 437e14bb325SJeff Bonwick extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 438e14bb325SJeff Bonwick void *data, uint64_t size, zio_done_func_t *done, void *private, 439b24ab676SJeff Bonwick int priority, enum zio_flag flags, zbookmark_t *zb); 440fa9e4066Sahrens 441b24ab676SJeff Bonwick extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies); 44282c9918fSTim Haley 443b24ab676SJeff Bonwick extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); 444fa9e4066Sahrens 445b24ab676SJeff Bonwick extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, 446b24ab676SJeff Bonwick const blkptr_t *bp, 447b24ab676SJeff Bonwick zio_done_func_t *done, void *private, enum zio_flag flags); 448fa9e4066Sahrens 449fa9e4066Sahrens extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, 450b24ab676SJeff Bonwick zio_done_func_t *done, void *private, int priority, enum zio_flag flags); 451fa9e4066Sahrens 452fa9e4066Sahrens extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 453fa9e4066Sahrens uint64_t size, void *data, int checksum, 454b24ab676SJeff Bonwick zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 455fa94a07fSbrendan boolean_t labels); 456fa9e4066Sahrens 457fa9e4066Sahrens extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 458fa9e4066Sahrens uint64_t size, void *data, int checksum, 459b24ab676SJeff Bonwick zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 460fa94a07fSbrendan boolean_t labels); 461fa9e4066Sahrens 462b24ab676SJeff Bonwick extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, 463b24ab676SJeff Bonwick const blkptr_t *bp, enum zio_flag flags); 464b24ab676SJeff Bonwick 465b24ab676SJeff Bonwick extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, 466b24ab676SJeff Bonwick blkptr_t *old_bp, uint64_t size, boolean_t use_slog); 467b24ab676SJeff Bonwick extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); 46817f17c2dSbonwick extern void zio_flush(zio_t *zio, vdev_t *vd); 4696e1f5caaSNeil Perrin extern void zio_shrink(zio_t *zio, uint64_t size); 470fa9e4066Sahrens 471fa9e4066Sahrens extern int zio_wait(zio_t *zio); 472fa9e4066Sahrens extern void zio_nowait(zio_t *zio); 473e05725b1Sbonwick extern void zio_execute(zio_t *zio); 474e05725b1Sbonwick extern void zio_interrupt(zio_t *zio); 475e05725b1Sbonwick 476a3f829aeSBill Moore extern zio_t *zio_walk_parents(zio_t *cio); 477a3f829aeSBill Moore extern zio_t *zio_walk_children(zio_t *pio); 478a3f829aeSBill Moore extern zio_t *zio_unique_parent(zio_t *cio); 479a3f829aeSBill Moore extern void zio_add_child(zio_t *pio, zio_t *cio); 480a3f829aeSBill Moore 481fa9e4066Sahrens extern void *zio_buf_alloc(size_t size); 482fa9e4066Sahrens extern void zio_buf_free(void *buf, size_t size); 483ad23a2dbSjohansen extern void *zio_data_buf_alloc(size_t size); 484ad23a2dbSjohansen extern void zio_data_buf_free(void *buf, size_t size); 485fa9e4066Sahrens 4860a4e9518Sgw extern void zio_resubmit_stage_async(void *); 487fa9e4066Sahrens 488fa9e4066Sahrens extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, 489fa9e4066Sahrens uint64_t offset, void *data, uint64_t size, int type, int priority, 490b24ab676SJeff Bonwick enum zio_flag flags, zio_done_func_t *done, void *private); 491fa9e4066Sahrens 492e14bb325SJeff Bonwick extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, 493e14bb325SJeff Bonwick void *data, uint64_t size, int type, int priority, 494b24ab676SJeff Bonwick enum zio_flag flags, zio_done_func_t *done, void *private); 495e14bb325SJeff Bonwick 496fa9e4066Sahrens extern void zio_vdev_io_bypass(zio_t *zio); 497fa9e4066Sahrens extern void zio_vdev_io_reissue(zio_t *zio); 498fa9e4066Sahrens extern void zio_vdev_io_redone(zio_t *zio); 499fa9e4066Sahrens 500fa9e4066Sahrens extern void zio_checksum_verified(zio_t *zio); 501e14bb325SJeff Bonwick extern int zio_worst_error(int e1, int e2); 502fa9e4066Sahrens 503b24ab676SJeff Bonwick extern enum zio_checksum zio_checksum_select(enum zio_checksum child, 504b24ab676SJeff Bonwick enum zio_checksum parent); 505b24ab676SJeff Bonwick extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, 506b24ab676SJeff Bonwick enum zio_checksum child, enum zio_checksum parent); 507b24ab676SJeff Bonwick extern enum zio_compress zio_compress_select(enum zio_compress child, 508b24ab676SJeff Bonwick enum zio_compress parent); 509fa9e4066Sahrens 510e14bb325SJeff Bonwick extern void zio_suspend(spa_t *spa, zio_t *zio); 51154d692b7SGeorge Wilson extern int zio_resume(spa_t *spa); 512e14bb325SJeff Bonwick extern void zio_resume_wait(spa_t *spa); 513ea8dc4b6Seschrock 514fa9e4066Sahrens /* 515fa9e4066Sahrens * Initial setup and teardown. 516fa9e4066Sahrens */ 517fa9e4066Sahrens extern void zio_init(void); 518fa9e4066Sahrens extern void zio_fini(void); 519fa9e4066Sahrens 520ea8dc4b6Seschrock /* 521ea8dc4b6Seschrock * Fault injection 522ea8dc4b6Seschrock */ 523ea8dc4b6Seschrock struct zinject_record; 524ea8dc4b6Seschrock extern uint32_t zio_injection_enabled; 525ea8dc4b6Seschrock extern int zio_inject_fault(char *name, int flags, int *id, 526ea8dc4b6Seschrock struct zinject_record *record); 527ea8dc4b6Seschrock extern int zio_inject_list_next(int *id, char *name, size_t buflen, 528ea8dc4b6Seschrock struct zinject_record *record); 529ea8dc4b6Seschrock extern int zio_clear_fault(int id); 5301195e687SMark J Musante extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); 531ea8dc4b6Seschrock extern int zio_handle_fault_injection(zio_t *zio, int error); 5328956713aSEric Schrock extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); 53321bf64a7Sgw extern int zio_handle_label_injection(zio_t *zio, int error); 534468c413aSTim Haley extern void zio_handle_ignored_writes(zio_t *zio); 535ea8dc4b6Seschrock 53622fe2c88SJonathan Adams /* 53722fe2c88SJonathan Adams * Checksum ereport functions 53822fe2c88SJonathan Adams */ 53922fe2c88SJonathan Adams extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio, 54022fe2c88SJonathan Adams uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info); 54122fe2c88SJonathan Adams extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, 54222fe2c88SJonathan Adams const void *good_data, const void *bad_data, boolean_t drop_if_identical); 54322fe2c88SJonathan Adams 54422fe2c88SJonathan Adams extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report); 54522fe2c88SJonathan Adams extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); 54622fe2c88SJonathan Adams 54722fe2c88SJonathan Adams /* If we have the good data in hand, this function can be used */ 54822fe2c88SJonathan Adams extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, 54922fe2c88SJonathan Adams struct zio *zio, uint64_t offset, uint64_t length, 55022fe2c88SJonathan Adams const void *good_data, const void *bad_data, struct zio_bad_cksum *info); 55122fe2c88SJonathan Adams 552468c413aSTim Haley /* Called from spa_sync(), but primarily an injection handler */ 553468c413aSTim Haley extern void spa_handle_ignored_writes(spa_t *spa); 554468c413aSTim Haley 555fa9e4066Sahrens #ifdef __cplusplus 556fa9e4066Sahrens } 557fa9e4066Sahrens #endif 558fa9e4066Sahrens 559fa9e4066Sahrens #endif /* _ZIO_H */ 560