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 /* 23a3f829aeSBill Moore * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24fa9e4066Sahrens * Use is subject to license terms. 25fa9e4066Sahrens */ 26fa9e4066Sahrens 27fa9e4066Sahrens #ifndef _ZIO_H 28fa9e4066Sahrens #define _ZIO_H 29fa9e4066Sahrens 30fa9e4066Sahrens #include <sys/zfs_context.h> 31fa9e4066Sahrens #include <sys/spa.h> 32fa9e4066Sahrens #include <sys/txg.h> 33fa9e4066Sahrens #include <sys/avl.h> 34fa9e4066Sahrens #include <sys/fs/zfs.h> 3544cd46caSbillm #include <sys/zio_impl.h> 36fa9e4066Sahrens 37fa9e4066Sahrens #ifdef __cplusplus 38fa9e4066Sahrens extern "C" { 39fa9e4066Sahrens #endif 40fa9e4066Sahrens 41fa9e4066Sahrens #define ZBT_MAGIC 0x210da7ab10c7a11ULL /* zio data bloc tail */ 42fa9e4066Sahrens 43fa9e4066Sahrens typedef struct zio_block_tail { 44fa9e4066Sahrens uint64_t zbt_magic; /* for validation, endianness */ 45fa9e4066Sahrens zio_cksum_t zbt_cksum; /* 256-bit checksum */ 46fa9e4066Sahrens } zio_block_tail_t; 47fa9e4066Sahrens 48fa9e4066Sahrens /* 49fa9e4066Sahrens * Gang block headers are self-checksumming and contain an array 50fa9e4066Sahrens * of block pointers. 51fa9e4066Sahrens */ 52fa9e4066Sahrens #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 53fa9e4066Sahrens #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 54fa9e4066Sahrens sizeof (zio_block_tail_t)) / sizeof (blkptr_t)) 55fa9e4066Sahrens #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 56fa9e4066Sahrens sizeof (zio_block_tail_t) - \ 57fa9e4066Sahrens (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 58fa9e4066Sahrens sizeof (uint64_t)) 59fa9e4066Sahrens 60fa9e4066Sahrens typedef struct zio_gbh { 61fa9e4066Sahrens blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 62fa9e4066Sahrens uint64_t zg_filler[SPA_GBH_FILLER]; 63fa9e4066Sahrens zio_block_tail_t zg_tail; 64fa9e4066Sahrens } zio_gbh_phys_t; 65fa9e4066Sahrens 66fa9e4066Sahrens enum zio_checksum { 67fa9e4066Sahrens ZIO_CHECKSUM_INHERIT = 0, 68fa9e4066Sahrens ZIO_CHECKSUM_ON, 69fa9e4066Sahrens ZIO_CHECKSUM_OFF, 70fa9e4066Sahrens ZIO_CHECKSUM_LABEL, 71fa9e4066Sahrens ZIO_CHECKSUM_GANG_HEADER, 72fa9e4066Sahrens ZIO_CHECKSUM_ZILOG, 73fa9e4066Sahrens ZIO_CHECKSUM_FLETCHER_2, 74fa9e4066Sahrens ZIO_CHECKSUM_FLETCHER_4, 75fa9e4066Sahrens ZIO_CHECKSUM_SHA256, 76fa9e4066Sahrens ZIO_CHECKSUM_FUNCTIONS 77fa9e4066Sahrens }; 78fa9e4066Sahrens 797e322df5SJonathan Adams #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 80fa9e4066Sahrens #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 81fa9e4066Sahrens 82*b24ab676SJeff Bonwick #define ZIO_CHECKSUM_MASK 0xffULL 83*b24ab676SJeff Bonwick #define ZIO_CHECKSUM_VERIFY (1 << 8) 84*b24ab676SJeff Bonwick 85*b24ab676SJeff Bonwick #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 86*b24ab676SJeff Bonwick #define ZIO_DEDUPDITTO_MIN 100 87*b24ab676SJeff Bonwick 88fa9e4066Sahrens enum zio_compress { 89fa9e4066Sahrens ZIO_COMPRESS_INHERIT = 0, 90fa9e4066Sahrens ZIO_COMPRESS_ON, 91fa9e4066Sahrens ZIO_COMPRESS_OFF, 92fa9e4066Sahrens ZIO_COMPRESS_LZJB, 93416e0cd8Sek ZIO_COMPRESS_EMPTY, 94c9431fa1Sahl ZIO_COMPRESS_GZIP_1, 95c9431fa1Sahl ZIO_COMPRESS_GZIP_2, 96c9431fa1Sahl ZIO_COMPRESS_GZIP_3, 97c9431fa1Sahl ZIO_COMPRESS_GZIP_4, 98c9431fa1Sahl ZIO_COMPRESS_GZIP_5, 99c9431fa1Sahl ZIO_COMPRESS_GZIP_6, 100c9431fa1Sahl ZIO_COMPRESS_GZIP_7, 101c9431fa1Sahl ZIO_COMPRESS_GZIP_8, 102c9431fa1Sahl ZIO_COMPRESS_GZIP_9, 103*b24ab676SJeff Bonwick ZIO_COMPRESS_ZLE, 104fa9e4066Sahrens ZIO_COMPRESS_FUNCTIONS 105fa9e4066Sahrens }; 106fa9e4066Sahrens 107fa9e4066Sahrens #define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB 108fa9e4066Sahrens #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF 109fa9e4066Sahrens 110*b24ab676SJeff Bonwick #define BOOTFS_COMPRESS_VALID(compress) \ 111*b24ab676SJeff Bonwick ((compress) == ZIO_COMPRESS_LZJB || \ 112*b24ab676SJeff Bonwick ((compress) == ZIO_COMPRESS_ON && \ 113*b24ab676SJeff Bonwick ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \ 114*b24ab676SJeff Bonwick (compress) == ZIO_COMPRESS_OFF) 115*b24ab676SJeff Bonwick 1160a4e9518Sgw #define ZIO_FAILURE_MODE_WAIT 0 1170a4e9518Sgw #define ZIO_FAILURE_MODE_CONTINUE 1 1180a4e9518Sgw #define ZIO_FAILURE_MODE_PANIC 2 1190a4e9518Sgw 120fa9e4066Sahrens #define ZIO_PRIORITY_NOW (zio_priority_table[0]) 121fa9e4066Sahrens #define ZIO_PRIORITY_SYNC_READ (zio_priority_table[1]) 122fa9e4066Sahrens #define ZIO_PRIORITY_SYNC_WRITE (zio_priority_table[2]) 123fa9e4066Sahrens #define ZIO_PRIORITY_ASYNC_READ (zio_priority_table[3]) 124fa9e4066Sahrens #define ZIO_PRIORITY_ASYNC_WRITE (zio_priority_table[4]) 125fa9e4066Sahrens #define ZIO_PRIORITY_FREE (zio_priority_table[5]) 126fa9e4066Sahrens #define ZIO_PRIORITY_CACHE_FILL (zio_priority_table[6]) 127fa9e4066Sahrens #define ZIO_PRIORITY_LOG_WRITE (zio_priority_table[7]) 128fa9e4066Sahrens #define ZIO_PRIORITY_RESILVER (zio_priority_table[8]) 129fa9e4066Sahrens #define ZIO_PRIORITY_SCRUB (zio_priority_table[9]) 130fa9e4066Sahrens #define ZIO_PRIORITY_TABLE_SIZE 10 131fa9e4066Sahrens 132e05725b1Sbonwick #define ZIO_PIPELINE_CONTINUE 0x100 133e05725b1Sbonwick #define ZIO_PIPELINE_STOP 0x101 134e05725b1Sbonwick 135*b24ab676SJeff Bonwick enum zio_flag { 136*b24ab676SJeff Bonwick /* 137*b24ab676SJeff Bonwick * Flags inherited by gang, ddt, and vdev children, 138*b24ab676SJeff Bonwick * and that must be equal for two zios to aggregate 139*b24ab676SJeff Bonwick */ 140*b24ab676SJeff Bonwick ZIO_FLAG_DONT_AGGREGATE = 1 << 0, 141*b24ab676SJeff Bonwick ZIO_FLAG_IO_REPAIR = 1 << 1, 142*b24ab676SJeff Bonwick ZIO_FLAG_SELF_HEAL = 1 << 2, 143*b24ab676SJeff Bonwick ZIO_FLAG_RESILVER = 1 << 3, 144*b24ab676SJeff Bonwick ZIO_FLAG_SCRUB = 1 << 4, 145*b24ab676SJeff Bonwick ZIO_FLAG_SCRUB_THREAD = 1 << 5, 146*b24ab676SJeff Bonwick 147*b24ab676SJeff Bonwick #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) 148*b24ab676SJeff Bonwick 149*b24ab676SJeff Bonwick /* 150*b24ab676SJeff Bonwick * Flags inherited by ddt, gang, and vdev children. 151*b24ab676SJeff Bonwick */ 152*b24ab676SJeff Bonwick ZIO_FLAG_CANFAIL = 1 << 6, /* must be first for INHERIT */ 153*b24ab676SJeff Bonwick ZIO_FLAG_SPECULATIVE = 1 << 7, 154*b24ab676SJeff Bonwick ZIO_FLAG_CONFIG_WRITER = 1 << 8, 155*b24ab676SJeff Bonwick ZIO_FLAG_DONT_RETRY = 1 << 9, 156*b24ab676SJeff Bonwick ZIO_FLAG_DONT_CACHE = 1 << 10, 157*b24ab676SJeff Bonwick ZIO_FLAG_NODATA = 1 << 11, 158*b24ab676SJeff Bonwick ZIO_FLAG_INDUCE_DAMAGE = 1 << 12, 159*b24ab676SJeff Bonwick 160*b24ab676SJeff Bonwick #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) 161*b24ab676SJeff Bonwick #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) 162*b24ab676SJeff Bonwick 163*b24ab676SJeff Bonwick /* 164*b24ab676SJeff Bonwick * Flags inherited by vdev children. 165*b24ab676SJeff Bonwick */ 166*b24ab676SJeff Bonwick ZIO_FLAG_IO_RETRY = 1 << 13, /* must be first for INHERIT */ 167*b24ab676SJeff Bonwick ZIO_FLAG_PROBE = 1 << 14, 168*b24ab676SJeff Bonwick ZIO_FLAG_TRYHARD = 1 << 15, 169*b24ab676SJeff Bonwick ZIO_FLAG_OPTIONAL = 1 << 16, 170*b24ab676SJeff Bonwick 171*b24ab676SJeff Bonwick #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) 172*b24ab676SJeff Bonwick 173*b24ab676SJeff Bonwick /* 174*b24ab676SJeff Bonwick * Flags not inherited by any children. 175*b24ab676SJeff Bonwick */ 176*b24ab676SJeff Bonwick ZIO_FLAG_DONT_QUEUE = 1 << 17, /* must be first for INHERIT */ 177*b24ab676SJeff Bonwick ZIO_FLAG_DONT_PROPAGATE = 1 << 18, 178*b24ab676SJeff Bonwick ZIO_FLAG_IO_BYPASS = 1 << 19, 179*b24ab676SJeff Bonwick ZIO_FLAG_IO_REWRITE = 1 << 20, 180*b24ab676SJeff Bonwick ZIO_FLAG_RAW = 1 << 21, 181*b24ab676SJeff Bonwick ZIO_FLAG_GANG_CHILD = 1 << 22, 182*b24ab676SJeff Bonwick ZIO_FLAG_DDT_CHILD = 1 << 23, 183*b24ab676SJeff Bonwick ZIO_FLAG_GODFATHER = 1 << 24 184*b24ab676SJeff Bonwick }; 185*b24ab676SJeff Bonwick 186*b24ab676SJeff Bonwick #define ZIO_FLAG_MUSTSUCCEED 0 187*b24ab676SJeff Bonwick 188*b24ab676SJeff Bonwick #define ZIO_DDT_CHILD_FLAGS(zio) \ 189*b24ab676SJeff Bonwick (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ 190*b24ab676SJeff Bonwick ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) 191*b24ab676SJeff Bonwick 192e14bb325SJeff Bonwick #define ZIO_GANG_CHILD_FLAGS(zio) \ 193e14bb325SJeff Bonwick (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ 194e14bb325SJeff Bonwick ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) 195e14bb325SJeff Bonwick 196*b24ab676SJeff Bonwick #define ZIO_VDEV_CHILD_FLAGS(zio) \ 197*b24ab676SJeff Bonwick (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ 198*b24ab676SJeff Bonwick ZIO_FLAG_CANFAIL) 199*b24ab676SJeff Bonwick 200e14bb325SJeff Bonwick enum zio_child { 201e14bb325SJeff Bonwick ZIO_CHILD_VDEV = 0, 202e14bb325SJeff Bonwick ZIO_CHILD_GANG, 203*b24ab676SJeff Bonwick ZIO_CHILD_DDT, 204e14bb325SJeff Bonwick ZIO_CHILD_LOGICAL, 205e14bb325SJeff Bonwick ZIO_CHILD_TYPES 206e14bb325SJeff Bonwick }; 207e14bb325SJeff Bonwick 208e14bb325SJeff Bonwick enum zio_wait_type { 209e14bb325SJeff Bonwick ZIO_WAIT_READY = 0, 210e14bb325SJeff Bonwick ZIO_WAIT_DONE, 211e14bb325SJeff Bonwick ZIO_WAIT_TYPES 212e14bb325SJeff Bonwick }; 213e14bb325SJeff Bonwick 214fa9e4066Sahrens /* 215e7cbe64fSgw * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent 216e7cbe64fSgw * graveyard) to indicate checksum errors and fragmentation. 217fa9e4066Sahrens */ 218fa9e4066Sahrens #define ECKSUM EBADE 219e7cbe64fSgw #define EFRAGS EBADR 220fa9e4066Sahrens 221fa9e4066Sahrens typedef void zio_done_func_t(zio_t *zio); 222fa9e4066Sahrens 223fa9e4066Sahrens extern uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE]; 224fa9e4066Sahrens extern char *zio_type_name[ZIO_TYPES]; 225fa9e4066Sahrens 226ea8dc4b6Seschrock /* 227ea8dc4b6Seschrock * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely 228ea8dc4b6Seschrock * identifies any block in the pool. By convention, the meta-objset (MOS) 229*b24ab676SJeff Bonwick * is objset 0, and the meta-dnode is object 0. This covers all blocks 230*b24ab676SJeff Bonwick * except root blocks and ZIL blocks, which are defined as follows: 231ea8dc4b6Seschrock * 232*b24ab676SJeff Bonwick * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. 233*b24ab676SJeff Bonwick * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. 234*b24ab676SJeff Bonwick * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. 235ea8dc4b6Seschrock * 236*b24ab676SJeff Bonwick * Note: this structure is called a bookmark because its original purpose 237*b24ab676SJeff Bonwick * was to remember where to resume a pool-wide traverse. 238ea8dc4b6Seschrock * 239ea8dc4b6Seschrock * Note: this structure is passed between userland and the kernel. 240ea8dc4b6Seschrock * Therefore it must not change size or alignment between 32/64 bit 241ea8dc4b6Seschrock * compilation options. 242ea8dc4b6Seschrock */ 243ea8dc4b6Seschrock typedef struct zbookmark { 244ea8dc4b6Seschrock uint64_t zb_objset; 245ea8dc4b6Seschrock uint64_t zb_object; 246ea8dc4b6Seschrock int64_t zb_level; 247ea8dc4b6Seschrock uint64_t zb_blkid; 248ea8dc4b6Seschrock } zbookmark_t; 249ea8dc4b6Seschrock 250*b24ab676SJeff Bonwick #define SET_BOOKMARK(zb, objset, object, level, blkid) \ 251*b24ab676SJeff Bonwick { \ 252*b24ab676SJeff Bonwick (zb)->zb_objset = objset; \ 253*b24ab676SJeff Bonwick (zb)->zb_object = object; \ 254*b24ab676SJeff Bonwick (zb)->zb_level = level; \ 255*b24ab676SJeff Bonwick (zb)->zb_blkid = blkid; \ 256*b24ab676SJeff Bonwick } 257*b24ab676SJeff Bonwick 258*b24ab676SJeff Bonwick #define ZB_DESTROYED_OBJSET (-1ULL) 259*b24ab676SJeff Bonwick 260*b24ab676SJeff Bonwick #define ZB_ROOT_OBJECT (0ULL) 261*b24ab676SJeff Bonwick #define ZB_ROOT_LEVEL (-1LL) 262*b24ab676SJeff Bonwick #define ZB_ROOT_BLKID (0ULL) 263*b24ab676SJeff Bonwick 264*b24ab676SJeff Bonwick #define ZB_ZIL_OBJECT (0ULL) 265*b24ab676SJeff Bonwick #define ZB_ZIL_LEVEL (-2LL) 266*b24ab676SJeff Bonwick 267e14bb325SJeff Bonwick typedef struct zio_prop { 268e14bb325SJeff Bonwick enum zio_checksum zp_checksum; 269e14bb325SJeff Bonwick enum zio_compress zp_compress; 270e14bb325SJeff Bonwick dmu_object_type_t zp_type; 271e14bb325SJeff Bonwick uint8_t zp_level; 272*b24ab676SJeff Bonwick uint8_t zp_copies; 273*b24ab676SJeff Bonwick uint8_t zp_dedup; 274*b24ab676SJeff Bonwick uint8_t zp_dedup_verify; 275e14bb325SJeff Bonwick } zio_prop_t; 276e14bb325SJeff Bonwick 27722fe2c88SJonathan Adams typedef struct zio_cksum_report zio_cksum_report_t; 27822fe2c88SJonathan Adams 27922fe2c88SJonathan Adams typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, 28022fe2c88SJonathan Adams const void *good_data); 28122fe2c88SJonathan Adams typedef void zio_cksum_free_f(void *cbdata, size_t size); 28222fe2c88SJonathan Adams 28322fe2c88SJonathan Adams struct zio_bad_cksum; /* defined in zio_checksum.h */ 28422fe2c88SJonathan Adams 28522fe2c88SJonathan Adams struct zio_cksum_report { 28622fe2c88SJonathan Adams struct zio_cksum_report *zcr_next; 28722fe2c88SJonathan Adams nvlist_t *zcr_ereport; 28822fe2c88SJonathan Adams nvlist_t *zcr_detector; 28922fe2c88SJonathan Adams void *zcr_cbdata; 29022fe2c88SJonathan Adams size_t zcr_cbinfo; /* passed to zcr_free() */ 291*b24ab676SJeff Bonwick uint64_t zcr_align; 29222fe2c88SJonathan Adams uint64_t zcr_length; 29322fe2c88SJonathan Adams zio_cksum_finish_f *zcr_finish; 29422fe2c88SJonathan Adams zio_cksum_free_f *zcr_free; 29522fe2c88SJonathan Adams 29622fe2c88SJonathan Adams /* internal use only */ 29722fe2c88SJonathan Adams struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ 29822fe2c88SJonathan Adams }; 29922fe2c88SJonathan Adams 30022fe2c88SJonathan Adams typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, 30122fe2c88SJonathan Adams void *arg); 30222fe2c88SJonathan Adams 30322fe2c88SJonathan Adams zio_vsd_cksum_report_f zio_vsd_default_cksum_report; 30422fe2c88SJonathan Adams 30522fe2c88SJonathan Adams typedef struct zio_vsd_ops { 30622fe2c88SJonathan Adams zio_done_func_t *vsd_free; 30722fe2c88SJonathan Adams zio_vsd_cksum_report_f *vsd_cksum_report; 30822fe2c88SJonathan Adams } zio_vsd_ops_t; 30922fe2c88SJonathan Adams 310e14bb325SJeff Bonwick typedef struct zio_gang_node { 311e14bb325SJeff Bonwick zio_gbh_phys_t *gn_gbh; 312e14bb325SJeff Bonwick struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; 313e14bb325SJeff Bonwick } zio_gang_node_t; 314e14bb325SJeff Bonwick 315e14bb325SJeff Bonwick typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, 316e14bb325SJeff Bonwick zio_gang_node_t *gn, void *data); 317e14bb325SJeff Bonwick 318e14bb325SJeff Bonwick typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size); 319e14bb325SJeff Bonwick 320e14bb325SJeff Bonwick typedef struct zio_transform { 321e14bb325SJeff Bonwick void *zt_orig_data; 322e14bb325SJeff Bonwick uint64_t zt_orig_size; 323e14bb325SJeff Bonwick uint64_t zt_bufsize; 324e14bb325SJeff Bonwick zio_transform_func_t *zt_transform; 325e14bb325SJeff Bonwick struct zio_transform *zt_next; 326e14bb325SJeff Bonwick } zio_transform_t; 327e14bb325SJeff Bonwick 328e14bb325SJeff Bonwick typedef int zio_pipe_stage_t(zio_t *zio); 329e14bb325SJeff Bonwick 330e14bb325SJeff Bonwick /* 331e14bb325SJeff Bonwick * The io_reexecute flags are distinct from io_flags because the child must 332e14bb325SJeff Bonwick * be able to propagate them to the parent. The normal io_flags are local 333e14bb325SJeff Bonwick * to the zio, not protected by any lock, and not modifiable by children; 334e14bb325SJeff Bonwick * the reexecute flags are protected by io_lock, modifiable by children, 335e14bb325SJeff Bonwick * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. 336e14bb325SJeff Bonwick */ 337e14bb325SJeff Bonwick #define ZIO_REEXECUTE_NOW 0x01 338e14bb325SJeff Bonwick #define ZIO_REEXECUTE_SUSPEND 0x02 339e14bb325SJeff Bonwick 340a3f829aeSBill Moore typedef struct zio_link { 341a3f829aeSBill Moore zio_t *zl_parent; 342a3f829aeSBill Moore zio_t *zl_child; 343a3f829aeSBill Moore list_node_t zl_parent_node; 344a3f829aeSBill Moore list_node_t zl_child_node; 345a3f829aeSBill Moore } zio_link_t; 346a3f829aeSBill Moore 347fa9e4066Sahrens struct zio { 348fa9e4066Sahrens /* Core information about this I/O */ 349ea8dc4b6Seschrock zbookmark_t io_bookmark; 350e14bb325SJeff Bonwick zio_prop_t io_prop; 351e14bb325SJeff Bonwick zio_type_t io_type; 352e14bb325SJeff Bonwick enum zio_child io_child_type; 353e14bb325SJeff Bonwick int io_cmd; 354e14bb325SJeff Bonwick uint8_t io_priority; 355e14bb325SJeff Bonwick uint8_t io_reexecute; 356a3f829aeSBill Moore uint8_t io_state[ZIO_WAIT_TYPES]; 357fa9e4066Sahrens uint64_t io_txg; 358e14bb325SJeff Bonwick spa_t *io_spa; 359fa9e4066Sahrens blkptr_t *io_bp; 360*b24ab676SJeff Bonwick blkptr_t *io_bp_override; 361fa9e4066Sahrens blkptr_t io_bp_copy; 362a3f829aeSBill Moore list_t io_parent_list; 363a3f829aeSBill Moore list_t io_child_list; 364a3f829aeSBill Moore zio_link_t *io_walk_link; 365ea8dc4b6Seschrock zio_t *io_logical; 366e14bb325SJeff Bonwick zio_transform_t *io_transform_stack; 367fa9e4066Sahrens 368fa9e4066Sahrens /* Callback info */ 369c717a561Smaybee zio_done_func_t *io_ready; 370fa9e4066Sahrens zio_done_func_t *io_done; 371fa9e4066Sahrens void *io_private; 372*b24ab676SJeff Bonwick int64_t io_prev_space_delta; /* DMU private */ 373fa9e4066Sahrens blkptr_t io_bp_orig; 374fa9e4066Sahrens 375fa9e4066Sahrens /* Data represented by this I/O */ 376fa9e4066Sahrens void *io_data; 377*b24ab676SJeff Bonwick void *io_orig_data; 378fa9e4066Sahrens uint64_t io_size; 379*b24ab676SJeff Bonwick uint64_t io_orig_size; 380fa9e4066Sahrens 381fa9e4066Sahrens /* Stuff for the vdev stack */ 382fa9e4066Sahrens vdev_t *io_vd; 383fa9e4066Sahrens void *io_vsd; 38422fe2c88SJonathan Adams const zio_vsd_ops_t *io_vsd_ops; 38522fe2c88SJonathan Adams 386fa9e4066Sahrens uint64_t io_offset; 387fa9e4066Sahrens uint64_t io_deadline; 388fa9e4066Sahrens avl_node_t io_offset_node; 389fa9e4066Sahrens avl_node_t io_deadline_node; 390fa9e4066Sahrens avl_tree_t *io_vdev_tree; 391fa9e4066Sahrens 392fa9e4066Sahrens /* Internal pipeline state */ 393*b24ab676SJeff Bonwick enum zio_flag io_flags; 394*b24ab676SJeff Bonwick enum zio_stage io_stage; 395*b24ab676SJeff Bonwick enum zio_stage io_pipeline; 396*b24ab676SJeff Bonwick enum zio_flag io_orig_flags; 397*b24ab676SJeff Bonwick enum zio_stage io_orig_stage; 398*b24ab676SJeff Bonwick enum zio_stage io_orig_pipeline; 399e14bb325SJeff Bonwick int io_error; 400e14bb325SJeff Bonwick int io_child_error[ZIO_CHILD_TYPES]; 401e14bb325SJeff Bonwick uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; 402*b24ab676SJeff Bonwick uint64_t io_child_count; 403*b24ab676SJeff Bonwick uint64_t io_parent_count; 404e14bb325SJeff Bonwick uint64_t *io_stall; 405f5383399SBill Moore zio_t *io_gang_leader; 406e14bb325SJeff Bonwick zio_gang_node_t *io_gang_tree; 407e14bb325SJeff Bonwick void *io_executor; 408fa9e4066Sahrens void *io_waiter; 409fa9e4066Sahrens kmutex_t io_lock; 410fa9e4066Sahrens kcondvar_t io_cv; 411ea8dc4b6Seschrock 412ea8dc4b6Seschrock /* FMA state */ 41322fe2c88SJonathan Adams zio_cksum_report_t *io_cksum_report; 414ea8dc4b6Seschrock uint64_t io_ena; 415fa9e4066Sahrens }; 416fa9e4066Sahrens 417a3f829aeSBill Moore extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, 418*b24ab676SJeff Bonwick zio_done_func_t *done, void *private, enum zio_flag flags); 419fa9e4066Sahrens 420fa9e4066Sahrens extern zio_t *zio_root(spa_t *spa, 421*b24ab676SJeff Bonwick zio_done_func_t *done, void *private, enum zio_flag flags); 422fa9e4066Sahrens 423088f3894Sahrens extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data, 424fa9e4066Sahrens uint64_t size, zio_done_func_t *done, void *private, 425*b24ab676SJeff Bonwick int priority, enum zio_flag flags, const zbookmark_t *zb); 426fa9e4066Sahrens 427e14bb325SJeff Bonwick extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 428*b24ab676SJeff Bonwick void *data, uint64_t size, const zio_prop_t *zp, 429e14bb325SJeff Bonwick zio_done_func_t *ready, zio_done_func_t *done, void *private, 430*b24ab676SJeff Bonwick int priority, enum zio_flag flags, const zbookmark_t *zb); 431fa9e4066Sahrens 432e14bb325SJeff Bonwick extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 433e14bb325SJeff Bonwick void *data, uint64_t size, zio_done_func_t *done, void *private, 434*b24ab676SJeff Bonwick int priority, enum zio_flag flags, zbookmark_t *zb); 435fa9e4066Sahrens 436*b24ab676SJeff Bonwick extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies); 43782c9918fSTim Haley 438*b24ab676SJeff Bonwick extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); 439fa9e4066Sahrens 440*b24ab676SJeff Bonwick extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, 441*b24ab676SJeff Bonwick const blkptr_t *bp, 442*b24ab676SJeff Bonwick zio_done_func_t *done, void *private, enum zio_flag flags); 443fa9e4066Sahrens 444fa9e4066Sahrens extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, 445*b24ab676SJeff Bonwick zio_done_func_t *done, void *private, int priority, enum zio_flag flags); 446fa9e4066Sahrens 447fa9e4066Sahrens extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 448fa9e4066Sahrens uint64_t size, void *data, int checksum, 449*b24ab676SJeff Bonwick zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 450fa94a07fSbrendan boolean_t labels); 451fa9e4066Sahrens 452fa9e4066Sahrens extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 453fa9e4066Sahrens uint64_t size, void *data, int checksum, 454*b24ab676SJeff Bonwick zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 455fa94a07fSbrendan boolean_t labels); 456fa9e4066Sahrens 457*b24ab676SJeff Bonwick extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, 458*b24ab676SJeff Bonwick const blkptr_t *bp, enum zio_flag flags); 459*b24ab676SJeff Bonwick 460*b24ab676SJeff Bonwick extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, 461*b24ab676SJeff Bonwick blkptr_t *old_bp, uint64_t size, boolean_t use_slog); 462*b24ab676SJeff Bonwick extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); 46317f17c2dSbonwick extern void zio_flush(zio_t *zio, vdev_t *vd); 464fa9e4066Sahrens 465fa9e4066Sahrens extern int zio_wait(zio_t *zio); 466fa9e4066Sahrens extern void zio_nowait(zio_t *zio); 467e05725b1Sbonwick extern void zio_execute(zio_t *zio); 468e05725b1Sbonwick extern void zio_interrupt(zio_t *zio); 469e05725b1Sbonwick 470a3f829aeSBill Moore extern zio_t *zio_walk_parents(zio_t *cio); 471a3f829aeSBill Moore extern zio_t *zio_walk_children(zio_t *pio); 472a3f829aeSBill Moore extern zio_t *zio_unique_parent(zio_t *cio); 473a3f829aeSBill Moore extern void zio_add_child(zio_t *pio, zio_t *cio); 474a3f829aeSBill Moore 475fa9e4066Sahrens extern void *zio_buf_alloc(size_t size); 476fa9e4066Sahrens extern void zio_buf_free(void *buf, size_t size); 477ad23a2dbSjohansen extern void *zio_data_buf_alloc(size_t size); 478ad23a2dbSjohansen extern void zio_data_buf_free(void *buf, size_t size); 479fa9e4066Sahrens 4800a4e9518Sgw extern void zio_resubmit_stage_async(void *); 481fa9e4066Sahrens 482fa9e4066Sahrens extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, 483fa9e4066Sahrens uint64_t offset, void *data, uint64_t size, int type, int priority, 484*b24ab676SJeff Bonwick enum zio_flag flags, zio_done_func_t *done, void *private); 485fa9e4066Sahrens 486e14bb325SJeff Bonwick extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, 487e14bb325SJeff Bonwick void *data, uint64_t size, int type, int priority, 488*b24ab676SJeff Bonwick enum zio_flag flags, zio_done_func_t *done, void *private); 489e14bb325SJeff Bonwick 490fa9e4066Sahrens extern void zio_vdev_io_bypass(zio_t *zio); 491fa9e4066Sahrens extern void zio_vdev_io_reissue(zio_t *zio); 492fa9e4066Sahrens extern void zio_vdev_io_redone(zio_t *zio); 493fa9e4066Sahrens 494fa9e4066Sahrens extern void zio_checksum_verified(zio_t *zio); 495e14bb325SJeff Bonwick extern int zio_worst_error(int e1, int e2); 496fa9e4066Sahrens 497*b24ab676SJeff Bonwick extern enum zio_checksum zio_checksum_select(enum zio_checksum child, 498*b24ab676SJeff Bonwick enum zio_checksum parent); 499*b24ab676SJeff Bonwick extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, 500*b24ab676SJeff Bonwick enum zio_checksum child, enum zio_checksum parent); 501*b24ab676SJeff Bonwick extern enum zio_compress zio_compress_select(enum zio_compress child, 502*b24ab676SJeff Bonwick enum zio_compress parent); 503fa9e4066Sahrens 504e14bb325SJeff Bonwick extern void zio_suspend(spa_t *spa, zio_t *zio); 50554d692b7SGeorge Wilson extern int zio_resume(spa_t *spa); 506e14bb325SJeff Bonwick extern void zio_resume_wait(spa_t *spa); 507ea8dc4b6Seschrock 508fa9e4066Sahrens /* 509fa9e4066Sahrens * Initial setup and teardown. 510fa9e4066Sahrens */ 511fa9e4066Sahrens extern void zio_init(void); 512fa9e4066Sahrens extern void zio_fini(void); 513fa9e4066Sahrens 514ea8dc4b6Seschrock /* 515ea8dc4b6Seschrock * Fault injection 516ea8dc4b6Seschrock */ 517ea8dc4b6Seschrock struct zinject_record; 518ea8dc4b6Seschrock extern uint32_t zio_injection_enabled; 519ea8dc4b6Seschrock extern int zio_inject_fault(char *name, int flags, int *id, 520ea8dc4b6Seschrock struct zinject_record *record); 521ea8dc4b6Seschrock extern int zio_inject_list_next(int *id, char *name, size_t buflen, 522ea8dc4b6Seschrock struct zinject_record *record); 523ea8dc4b6Seschrock extern int zio_clear_fault(int id); 52488ecc943SGeorge Wilson extern void zio_handle_panic_injection(spa_t *spa, char *tag); 525ea8dc4b6Seschrock extern int zio_handle_fault_injection(zio_t *zio, int error); 5268956713aSEric Schrock extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); 52721bf64a7Sgw extern int zio_handle_label_injection(zio_t *zio, int error); 528468c413aSTim Haley extern void zio_handle_ignored_writes(zio_t *zio); 529ea8dc4b6Seschrock 53022fe2c88SJonathan Adams /* 53122fe2c88SJonathan Adams * Checksum ereport functions 53222fe2c88SJonathan Adams */ 53322fe2c88SJonathan Adams extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio, 53422fe2c88SJonathan Adams uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info); 53522fe2c88SJonathan Adams extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, 53622fe2c88SJonathan Adams const void *good_data, const void *bad_data, boolean_t drop_if_identical); 53722fe2c88SJonathan Adams 53822fe2c88SJonathan Adams extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report); 53922fe2c88SJonathan Adams extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); 54022fe2c88SJonathan Adams 54122fe2c88SJonathan Adams /* If we have the good data in hand, this function can be used */ 54222fe2c88SJonathan Adams extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, 54322fe2c88SJonathan Adams struct zio *zio, uint64_t offset, uint64_t length, 54422fe2c88SJonathan Adams const void *good_data, const void *bad_data, struct zio_bad_cksum *info); 54522fe2c88SJonathan Adams 546468c413aSTim Haley /* Called from spa_sync(), but primarily an injection handler */ 547468c413aSTim Haley extern void spa_handle_ignored_writes(spa_t *spa); 548468c413aSTim Haley 549fa9e4066Sahrens #ifdef __cplusplus 550fa9e4066Sahrens } 551fa9e4066Sahrens #endif 552fa9e4066Sahrens 553fa9e4066Sahrens #endif /* _ZIO_H */ 554