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. 245aeb9474SGarrett D'Amore * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25ad135b5dSChristopher Siden * Copyright (c) 2012 by Delphix. All rights reserved. 26a6f561b4SSašo Kiselkov * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 27*810e43b2SBill Pijewski * Copyright (c) 2013, Joyent, Inc. All rights reserved. 285aeb9474SGarrett D'Amore */ 29fa9e4066Sahrens 30fa9e4066Sahrens #ifndef _ZIO_H 31fa9e4066Sahrens #define _ZIO_H 32fa9e4066Sahrens 33fa9e4066Sahrens #include <sys/zfs_context.h> 34fa9e4066Sahrens #include <sys/spa.h> 35fa9e4066Sahrens #include <sys/txg.h> 36fa9e4066Sahrens #include <sys/avl.h> 37fa9e4066Sahrens #include <sys/fs/zfs.h> 3844cd46caSbillm #include <sys/zio_impl.h> 39fa9e4066Sahrens 40fa9e4066Sahrens #ifdef __cplusplus 41fa9e4066Sahrens extern "C" { 42fa9e4066Sahrens #endif 43fa9e4066Sahrens 446e1f5caaSNeil Perrin /* 456e1f5caaSNeil Perrin * Embedded checksum 466e1f5caaSNeil Perrin */ 476e1f5caaSNeil Perrin #define ZEC_MAGIC 0x210da7ab10c7a11ULL 48fa9e4066Sahrens 496e1f5caaSNeil Perrin typedef struct zio_eck { 506e1f5caaSNeil Perrin uint64_t zec_magic; /* for validation, endianness */ 516e1f5caaSNeil Perrin zio_cksum_t zec_cksum; /* 256-bit checksum */ 526e1f5caaSNeil Perrin } zio_eck_t; 53fa9e4066Sahrens 54fa9e4066Sahrens /* 55fa9e4066Sahrens * Gang block headers are self-checksumming and contain an array 56fa9e4066Sahrens * of block pointers. 57fa9e4066Sahrens */ 58fa9e4066Sahrens #define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE 59fa9e4066Sahrens #define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \ 606e1f5caaSNeil Perrin sizeof (zio_eck_t)) / sizeof (blkptr_t)) 61fa9e4066Sahrens #define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \ 626e1f5caaSNeil Perrin sizeof (zio_eck_t) - \ 63fa9e4066Sahrens (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\ 64fa9e4066Sahrens sizeof (uint64_t)) 65fa9e4066Sahrens 66fa9e4066Sahrens typedef struct zio_gbh { 67fa9e4066Sahrens blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS]; 68fa9e4066Sahrens uint64_t zg_filler[SPA_GBH_FILLER]; 696e1f5caaSNeil Perrin zio_eck_t zg_tail; 70fa9e4066Sahrens } zio_gbh_phys_t; 71fa9e4066Sahrens 72fa9e4066Sahrens enum zio_checksum { 73fa9e4066Sahrens ZIO_CHECKSUM_INHERIT = 0, 74fa9e4066Sahrens ZIO_CHECKSUM_ON, 75fa9e4066Sahrens ZIO_CHECKSUM_OFF, 76fa9e4066Sahrens ZIO_CHECKSUM_LABEL, 77fa9e4066Sahrens ZIO_CHECKSUM_GANG_HEADER, 78fa9e4066Sahrens ZIO_CHECKSUM_ZILOG, 79fa9e4066Sahrens ZIO_CHECKSUM_FLETCHER_2, 80fa9e4066Sahrens ZIO_CHECKSUM_FLETCHER_4, 81fa9e4066Sahrens ZIO_CHECKSUM_SHA256, 826e1f5caaSNeil Perrin ZIO_CHECKSUM_ZILOG2, 83*810e43b2SBill Pijewski ZIO_CHECKSUM_NOPARITY, 84fa9e4066Sahrens ZIO_CHECKSUM_FUNCTIONS 85fa9e4066Sahrens }; 86fa9e4066Sahrens 877e322df5SJonathan Adams #define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4 88fa9e4066Sahrens #define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON 89fa9e4066Sahrens 90b24ab676SJeff Bonwick #define ZIO_CHECKSUM_MASK 0xffULL 91b24ab676SJeff Bonwick #define ZIO_CHECKSUM_VERIFY (1 << 8) 92b24ab676SJeff Bonwick 93b24ab676SJeff Bonwick #define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256 94b24ab676SJeff Bonwick #define ZIO_DEDUPDITTO_MIN 100 95b24ab676SJeff Bonwick 96fa9e4066Sahrens enum zio_compress { 97fa9e4066Sahrens ZIO_COMPRESS_INHERIT = 0, 98fa9e4066Sahrens ZIO_COMPRESS_ON, 99fa9e4066Sahrens ZIO_COMPRESS_OFF, 100fa9e4066Sahrens ZIO_COMPRESS_LZJB, 101416e0cd8Sek ZIO_COMPRESS_EMPTY, 102c9431fa1Sahl ZIO_COMPRESS_GZIP_1, 103c9431fa1Sahl ZIO_COMPRESS_GZIP_2, 104c9431fa1Sahl ZIO_COMPRESS_GZIP_3, 105c9431fa1Sahl ZIO_COMPRESS_GZIP_4, 106c9431fa1Sahl ZIO_COMPRESS_GZIP_5, 107c9431fa1Sahl ZIO_COMPRESS_GZIP_6, 108c9431fa1Sahl ZIO_COMPRESS_GZIP_7, 109c9431fa1Sahl ZIO_COMPRESS_GZIP_8, 110c9431fa1Sahl ZIO_COMPRESS_GZIP_9, 111b24ab676SJeff Bonwick ZIO_COMPRESS_ZLE, 112a6f561b4SSašo Kiselkov ZIO_COMPRESS_LZ4, 113fa9e4066Sahrens ZIO_COMPRESS_FUNCTIONS 114fa9e4066Sahrens }; 115fa9e4066Sahrens 116a6f561b4SSašo Kiselkov /* N.B. when altering this value, also change BOOTFS_COMPRESS_VALID below */ 117fa9e4066Sahrens #define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB 118fa9e4066Sahrens #define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF 119fa9e4066Sahrens 120b24ab676SJeff Bonwick #define BOOTFS_COMPRESS_VALID(compress) \ 121b24ab676SJeff Bonwick ((compress) == ZIO_COMPRESS_LZJB || \ 122a6f561b4SSašo Kiselkov (compress) == ZIO_COMPRESS_LZ4 || \ 123b24ab676SJeff Bonwick ((compress) == ZIO_COMPRESS_ON && \ 124b24ab676SJeff Bonwick ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \ 125b24ab676SJeff Bonwick (compress) == ZIO_COMPRESS_OFF) 126b24ab676SJeff Bonwick 1270a4e9518Sgw #define ZIO_FAILURE_MODE_WAIT 0 1280a4e9518Sgw #define ZIO_FAILURE_MODE_CONTINUE 1 1290a4e9518Sgw #define ZIO_FAILURE_MODE_PANIC 2 1300a4e9518Sgw 131fa9e4066Sahrens #define ZIO_PRIORITY_NOW (zio_priority_table[0]) 132fa9e4066Sahrens #define ZIO_PRIORITY_SYNC_READ (zio_priority_table[1]) 133fa9e4066Sahrens #define ZIO_PRIORITY_SYNC_WRITE (zio_priority_table[2]) 13480eb36f2SGeorge Wilson #define ZIO_PRIORITY_LOG_WRITE (zio_priority_table[3]) 13580eb36f2SGeorge Wilson #define ZIO_PRIORITY_CACHE_FILL (zio_priority_table[4]) 13680eb36f2SGeorge Wilson #define ZIO_PRIORITY_AGG (zio_priority_table[5]) 13780eb36f2SGeorge Wilson #define ZIO_PRIORITY_FREE (zio_priority_table[6]) 13880eb36f2SGeorge Wilson #define ZIO_PRIORITY_ASYNC_WRITE (zio_priority_table[7]) 13980eb36f2SGeorge Wilson #define ZIO_PRIORITY_ASYNC_READ (zio_priority_table[8]) 14080eb36f2SGeorge Wilson #define ZIO_PRIORITY_RESILVER (zio_priority_table[9]) 14180eb36f2SGeorge Wilson #define ZIO_PRIORITY_SCRUB (zio_priority_table[10]) 142c7cd2421SGeorge Wilson #define ZIO_PRIORITY_DDT_PREFETCH (zio_priority_table[11]) 143c7cd2421SGeorge Wilson #define ZIO_PRIORITY_TABLE_SIZE 12 144fa9e4066Sahrens 145e05725b1Sbonwick #define ZIO_PIPELINE_CONTINUE 0x100 146e05725b1Sbonwick #define ZIO_PIPELINE_STOP 0x101 147e05725b1Sbonwick 148b24ab676SJeff Bonwick enum zio_flag { 149b24ab676SJeff Bonwick /* 150b24ab676SJeff Bonwick * Flags inherited by gang, ddt, and vdev children, 151b24ab676SJeff Bonwick * and that must be equal for two zios to aggregate 152b24ab676SJeff Bonwick */ 153b24ab676SJeff Bonwick ZIO_FLAG_DONT_AGGREGATE = 1 << 0, 154b24ab676SJeff Bonwick ZIO_FLAG_IO_REPAIR = 1 << 1, 155b24ab676SJeff Bonwick ZIO_FLAG_SELF_HEAL = 1 << 2, 156b24ab676SJeff Bonwick ZIO_FLAG_RESILVER = 1 << 3, 157b24ab676SJeff Bonwick ZIO_FLAG_SCRUB = 1 << 4, 15844ecc532SGeorge Wilson ZIO_FLAG_SCAN_THREAD = 1 << 5, 159b24ab676SJeff Bonwick 160b24ab676SJeff Bonwick #define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1) 161b24ab676SJeff Bonwick 162b24ab676SJeff Bonwick /* 163b24ab676SJeff Bonwick * Flags inherited by ddt, gang, and vdev children. 164b24ab676SJeff Bonwick */ 165b24ab676SJeff Bonwick ZIO_FLAG_CANFAIL = 1 << 6, /* must be first for INHERIT */ 166b24ab676SJeff Bonwick ZIO_FLAG_SPECULATIVE = 1 << 7, 167b24ab676SJeff Bonwick ZIO_FLAG_CONFIG_WRITER = 1 << 8, 168b24ab676SJeff Bonwick ZIO_FLAG_DONT_RETRY = 1 << 9, 169b24ab676SJeff Bonwick ZIO_FLAG_DONT_CACHE = 1 << 10, 170b24ab676SJeff Bonwick ZIO_FLAG_NODATA = 1 << 11, 171b24ab676SJeff Bonwick ZIO_FLAG_INDUCE_DAMAGE = 1 << 12, 172b24ab676SJeff Bonwick 173b24ab676SJeff Bonwick #define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1) 174b24ab676SJeff Bonwick #define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1) 175b24ab676SJeff Bonwick 176b24ab676SJeff Bonwick /* 177b24ab676SJeff Bonwick * Flags inherited by vdev children. 178b24ab676SJeff Bonwick */ 179b24ab676SJeff Bonwick ZIO_FLAG_IO_RETRY = 1 << 13, /* must be first for INHERIT */ 180b24ab676SJeff Bonwick ZIO_FLAG_PROBE = 1 << 14, 181b24ab676SJeff Bonwick ZIO_FLAG_TRYHARD = 1 << 15, 182b24ab676SJeff Bonwick ZIO_FLAG_OPTIONAL = 1 << 16, 183b24ab676SJeff Bonwick 184b24ab676SJeff Bonwick #define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1) 185b24ab676SJeff Bonwick 186b24ab676SJeff Bonwick /* 187b24ab676SJeff Bonwick * Flags not inherited by any children. 188b24ab676SJeff Bonwick */ 189b24ab676SJeff Bonwick ZIO_FLAG_DONT_QUEUE = 1 << 17, /* must be first for INHERIT */ 190b24ab676SJeff Bonwick ZIO_FLAG_DONT_PROPAGATE = 1 << 18, 191b24ab676SJeff Bonwick ZIO_FLAG_IO_BYPASS = 1 << 19, 192b24ab676SJeff Bonwick ZIO_FLAG_IO_REWRITE = 1 << 20, 193b24ab676SJeff Bonwick ZIO_FLAG_RAW = 1 << 21, 194b24ab676SJeff Bonwick ZIO_FLAG_GANG_CHILD = 1 << 22, 195b24ab676SJeff Bonwick ZIO_FLAG_DDT_CHILD = 1 << 23, 19680901aeaSGeorge Wilson ZIO_FLAG_GODFATHER = 1 << 24, 19780901aeaSGeorge Wilson ZIO_FLAG_NOPWRITE = 1 << 25, 19880901aeaSGeorge Wilson ZIO_FLAG_REEXECUTED = 1 << 26, 199b24ab676SJeff Bonwick }; 200b24ab676SJeff Bonwick 201b24ab676SJeff Bonwick #define ZIO_FLAG_MUSTSUCCEED 0 202b24ab676SJeff Bonwick 203b24ab676SJeff Bonwick #define ZIO_DDT_CHILD_FLAGS(zio) \ 204b24ab676SJeff Bonwick (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \ 205b24ab676SJeff Bonwick ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL) 206b24ab676SJeff Bonwick 207e14bb325SJeff Bonwick #define ZIO_GANG_CHILD_FLAGS(zio) \ 208e14bb325SJeff Bonwick (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \ 209e14bb325SJeff Bonwick ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL) 210e14bb325SJeff Bonwick 211b24ab676SJeff Bonwick #define ZIO_VDEV_CHILD_FLAGS(zio) \ 212b24ab676SJeff Bonwick (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \ 213b24ab676SJeff Bonwick ZIO_FLAG_CANFAIL) 214b24ab676SJeff Bonwick 215e14bb325SJeff Bonwick enum zio_child { 216e14bb325SJeff Bonwick ZIO_CHILD_VDEV = 0, 217e14bb325SJeff Bonwick ZIO_CHILD_GANG, 218b24ab676SJeff Bonwick ZIO_CHILD_DDT, 219e14bb325SJeff Bonwick ZIO_CHILD_LOGICAL, 220e14bb325SJeff Bonwick ZIO_CHILD_TYPES 221e14bb325SJeff Bonwick }; 222e14bb325SJeff Bonwick 223e14bb325SJeff Bonwick enum zio_wait_type { 224e14bb325SJeff Bonwick ZIO_WAIT_READY = 0, 225e14bb325SJeff Bonwick ZIO_WAIT_DONE, 226e14bb325SJeff Bonwick ZIO_WAIT_TYPES 227e14bb325SJeff Bonwick }; 228e14bb325SJeff Bonwick 229fa9e4066Sahrens /* 230e7cbe64fSgw * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent 231e7cbe64fSgw * graveyard) to indicate checksum errors and fragmentation. 232fa9e4066Sahrens */ 233fa9e4066Sahrens #define ECKSUM EBADE 234e7cbe64fSgw #define EFRAGS EBADR 235fa9e4066Sahrens 236fa9e4066Sahrens typedef void zio_done_func_t(zio_t *zio); 237fa9e4066Sahrens 238fa9e4066Sahrens extern uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE]; 239fa9e4066Sahrens extern char *zio_type_name[ZIO_TYPES]; 240fa9e4066Sahrens 241ea8dc4b6Seschrock /* 242ea8dc4b6Seschrock * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely 243ea8dc4b6Seschrock * identifies any block in the pool. By convention, the meta-objset (MOS) 244b24ab676SJeff Bonwick * is objset 0, and the meta-dnode is object 0. This covers all blocks 245b24ab676SJeff Bonwick * except root blocks and ZIL blocks, which are defined as follows: 246ea8dc4b6Seschrock * 247b24ab676SJeff Bonwick * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>. 248b24ab676SJeff Bonwick * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>. 249b24ab676SJeff Bonwick * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>. 250ea8dc4b6Seschrock * 251b24ab676SJeff Bonwick * Note: this structure is called a bookmark because its original purpose 252b24ab676SJeff Bonwick * was to remember where to resume a pool-wide traverse. 253ea8dc4b6Seschrock * 254ea8dc4b6Seschrock * Note: this structure is passed between userland and the kernel. 255ea8dc4b6Seschrock * Therefore it must not change size or alignment between 32/64 bit 256ea8dc4b6Seschrock * compilation options. 257ea8dc4b6Seschrock */ 258ea8dc4b6Seschrock typedef struct zbookmark { 259ea8dc4b6Seschrock uint64_t zb_objset; 260ea8dc4b6Seschrock uint64_t zb_object; 261ea8dc4b6Seschrock int64_t zb_level; 262ea8dc4b6Seschrock uint64_t zb_blkid; 263ea8dc4b6Seschrock } zbookmark_t; 264ea8dc4b6Seschrock 265b24ab676SJeff Bonwick #define SET_BOOKMARK(zb, objset, object, level, blkid) \ 266b24ab676SJeff Bonwick { \ 267b24ab676SJeff Bonwick (zb)->zb_objset = objset; \ 268b24ab676SJeff Bonwick (zb)->zb_object = object; \ 269b24ab676SJeff Bonwick (zb)->zb_level = level; \ 270b24ab676SJeff Bonwick (zb)->zb_blkid = blkid; \ 271b24ab676SJeff Bonwick } 272b24ab676SJeff Bonwick 273b24ab676SJeff Bonwick #define ZB_DESTROYED_OBJSET (-1ULL) 274b24ab676SJeff Bonwick 275b24ab676SJeff Bonwick #define ZB_ROOT_OBJECT (0ULL) 276b24ab676SJeff Bonwick #define ZB_ROOT_LEVEL (-1LL) 277b24ab676SJeff Bonwick #define ZB_ROOT_BLKID (0ULL) 278b24ab676SJeff Bonwick 279b24ab676SJeff Bonwick #define ZB_ZIL_OBJECT (0ULL) 280b24ab676SJeff Bonwick #define ZB_ZIL_LEVEL (-2LL) 281b24ab676SJeff Bonwick 282ad135b5dSChristopher Siden #define ZB_IS_ZERO(zb) \ 283ad135b5dSChristopher Siden ((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \ 284ad135b5dSChristopher Siden (zb)->zb_level == 0 && (zb)->zb_blkid == 0) 285ad135b5dSChristopher Siden #define ZB_IS_ROOT(zb) \ 286ad135b5dSChristopher Siden ((zb)->zb_object == ZB_ROOT_OBJECT && \ 287ad135b5dSChristopher Siden (zb)->zb_level == ZB_ROOT_LEVEL && \ 288ad135b5dSChristopher Siden (zb)->zb_blkid == ZB_ROOT_BLKID) 289ad135b5dSChristopher Siden 290e14bb325SJeff Bonwick typedef struct zio_prop { 291e14bb325SJeff Bonwick enum zio_checksum zp_checksum; 292e14bb325SJeff Bonwick enum zio_compress zp_compress; 293e14bb325SJeff Bonwick dmu_object_type_t zp_type; 294e14bb325SJeff Bonwick uint8_t zp_level; 295b24ab676SJeff Bonwick uint8_t zp_copies; 29680901aeaSGeorge Wilson boolean_t zp_dedup; 29780901aeaSGeorge Wilson boolean_t zp_dedup_verify; 29880901aeaSGeorge Wilson boolean_t zp_nopwrite; 299e14bb325SJeff Bonwick } zio_prop_t; 300e14bb325SJeff Bonwick 30122fe2c88SJonathan Adams typedef struct zio_cksum_report zio_cksum_report_t; 30222fe2c88SJonathan Adams 30322fe2c88SJonathan Adams typedef void zio_cksum_finish_f(zio_cksum_report_t *rep, 30422fe2c88SJonathan Adams const void *good_data); 30522fe2c88SJonathan Adams typedef void zio_cksum_free_f(void *cbdata, size_t size); 30622fe2c88SJonathan Adams 30722fe2c88SJonathan Adams struct zio_bad_cksum; /* defined in zio_checksum.h */ 308ad135b5dSChristopher Siden struct dnode_phys; 30922fe2c88SJonathan Adams 31022fe2c88SJonathan Adams struct zio_cksum_report { 31122fe2c88SJonathan Adams struct zio_cksum_report *zcr_next; 31222fe2c88SJonathan Adams nvlist_t *zcr_ereport; 31322fe2c88SJonathan Adams nvlist_t *zcr_detector; 31422fe2c88SJonathan Adams void *zcr_cbdata; 31522fe2c88SJonathan Adams size_t zcr_cbinfo; /* passed to zcr_free() */ 316b24ab676SJeff Bonwick uint64_t zcr_align; 31722fe2c88SJonathan Adams uint64_t zcr_length; 31822fe2c88SJonathan Adams zio_cksum_finish_f *zcr_finish; 31922fe2c88SJonathan Adams zio_cksum_free_f *zcr_free; 32022fe2c88SJonathan Adams 32122fe2c88SJonathan Adams /* internal use only */ 32222fe2c88SJonathan Adams struct zio_bad_cksum *zcr_ckinfo; /* information from failure */ 32322fe2c88SJonathan Adams }; 32422fe2c88SJonathan Adams 32522fe2c88SJonathan Adams typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr, 32622fe2c88SJonathan Adams void *arg); 32722fe2c88SJonathan Adams 32822fe2c88SJonathan Adams zio_vsd_cksum_report_f zio_vsd_default_cksum_report; 32922fe2c88SJonathan Adams 33022fe2c88SJonathan Adams typedef struct zio_vsd_ops { 33122fe2c88SJonathan Adams zio_done_func_t *vsd_free; 33222fe2c88SJonathan Adams zio_vsd_cksum_report_f *vsd_cksum_report; 33322fe2c88SJonathan Adams } zio_vsd_ops_t; 33422fe2c88SJonathan Adams 335e14bb325SJeff Bonwick typedef struct zio_gang_node { 336e14bb325SJeff Bonwick zio_gbh_phys_t *gn_gbh; 337e14bb325SJeff Bonwick struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS]; 338e14bb325SJeff Bonwick } zio_gang_node_t; 339e14bb325SJeff Bonwick 340e14bb325SJeff Bonwick typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp, 341e14bb325SJeff Bonwick zio_gang_node_t *gn, void *data); 342e14bb325SJeff Bonwick 343e14bb325SJeff Bonwick typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size); 344e14bb325SJeff Bonwick 345e14bb325SJeff Bonwick typedef struct zio_transform { 346e14bb325SJeff Bonwick void *zt_orig_data; 347e14bb325SJeff Bonwick uint64_t zt_orig_size; 348e14bb325SJeff Bonwick uint64_t zt_bufsize; 349e14bb325SJeff Bonwick zio_transform_func_t *zt_transform; 350e14bb325SJeff Bonwick struct zio_transform *zt_next; 351e14bb325SJeff Bonwick } zio_transform_t; 352e14bb325SJeff Bonwick 353e14bb325SJeff Bonwick typedef int zio_pipe_stage_t(zio_t *zio); 354e14bb325SJeff Bonwick 355e14bb325SJeff Bonwick /* 356e14bb325SJeff Bonwick * The io_reexecute flags are distinct from io_flags because the child must 357e14bb325SJeff Bonwick * be able to propagate them to the parent. The normal io_flags are local 358e14bb325SJeff Bonwick * to the zio, not protected by any lock, and not modifiable by children; 359e14bb325SJeff Bonwick * the reexecute flags are protected by io_lock, modifiable by children, 360e14bb325SJeff Bonwick * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set. 361e14bb325SJeff Bonwick */ 362e14bb325SJeff Bonwick #define ZIO_REEXECUTE_NOW 0x01 363e14bb325SJeff Bonwick #define ZIO_REEXECUTE_SUSPEND 0x02 364e14bb325SJeff Bonwick 365a3f829aeSBill Moore typedef struct zio_link { 366a3f829aeSBill Moore zio_t *zl_parent; 367a3f829aeSBill Moore zio_t *zl_child; 368a3f829aeSBill Moore list_node_t zl_parent_node; 369a3f829aeSBill Moore list_node_t zl_child_node; 370a3f829aeSBill Moore } zio_link_t; 371a3f829aeSBill Moore 372fa9e4066Sahrens struct zio { 373fa9e4066Sahrens /* Core information about this I/O */ 374ea8dc4b6Seschrock zbookmark_t io_bookmark; 375e14bb325SJeff Bonwick zio_prop_t io_prop; 376e14bb325SJeff Bonwick zio_type_t io_type; 377e14bb325SJeff Bonwick enum zio_child io_child_type; 378e14bb325SJeff Bonwick int io_cmd; 379e14bb325SJeff Bonwick uint8_t io_priority; 380e14bb325SJeff Bonwick uint8_t io_reexecute; 381a3f829aeSBill Moore uint8_t io_state[ZIO_WAIT_TYPES]; 382fa9e4066Sahrens uint64_t io_txg; 383e14bb325SJeff Bonwick spa_t *io_spa; 384fa9e4066Sahrens blkptr_t *io_bp; 385b24ab676SJeff Bonwick blkptr_t *io_bp_override; 386fa9e4066Sahrens blkptr_t io_bp_copy; 387a3f829aeSBill Moore list_t io_parent_list; 388a3f829aeSBill Moore list_t io_child_list; 389a3f829aeSBill Moore zio_link_t *io_walk_link; 390ea8dc4b6Seschrock zio_t *io_logical; 391e14bb325SJeff Bonwick zio_transform_t *io_transform_stack; 392fa9e4066Sahrens 393fa9e4066Sahrens /* Callback info */ 394c717a561Smaybee zio_done_func_t *io_ready; 395fa9e4066Sahrens zio_done_func_t *io_done; 396fa9e4066Sahrens void *io_private; 397b24ab676SJeff Bonwick int64_t io_prev_space_delta; /* DMU private */ 398fa9e4066Sahrens blkptr_t io_bp_orig; 399fa9e4066Sahrens 400fa9e4066Sahrens /* Data represented by this I/O */ 401fa9e4066Sahrens void *io_data; 402b24ab676SJeff Bonwick void *io_orig_data; 403fa9e4066Sahrens uint64_t io_size; 404b24ab676SJeff Bonwick uint64_t io_orig_size; 405fa9e4066Sahrens 406fa9e4066Sahrens /* Stuff for the vdev stack */ 407fa9e4066Sahrens vdev_t *io_vd; 408fa9e4066Sahrens void *io_vsd; 40922fe2c88SJonathan Adams const zio_vsd_ops_t *io_vsd_ops; 41022fe2c88SJonathan Adams 411fa9e4066Sahrens uint64_t io_offset; 412fa9e4066Sahrens uint64_t io_deadline; 413c55e05cbSMatthew Ahrens hrtime_t io_timestamp; 414fa9e4066Sahrens avl_node_t io_offset_node; 415fa9e4066Sahrens avl_node_t io_deadline_node; 416fa9e4066Sahrens avl_tree_t *io_vdev_tree; 417fa9e4066Sahrens 418fa9e4066Sahrens /* Internal pipeline state */ 419b24ab676SJeff Bonwick enum zio_flag io_flags; 420b24ab676SJeff Bonwick enum zio_stage io_stage; 421b24ab676SJeff Bonwick enum zio_stage io_pipeline; 422b24ab676SJeff Bonwick enum zio_flag io_orig_flags; 423b24ab676SJeff Bonwick enum zio_stage io_orig_stage; 424b24ab676SJeff Bonwick enum zio_stage io_orig_pipeline; 425e14bb325SJeff Bonwick int io_error; 426e14bb325SJeff Bonwick int io_child_error[ZIO_CHILD_TYPES]; 427e14bb325SJeff Bonwick uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES]; 428b24ab676SJeff Bonwick uint64_t io_child_count; 429b24ab676SJeff Bonwick uint64_t io_parent_count; 430e14bb325SJeff Bonwick uint64_t *io_stall; 431f5383399SBill Moore zio_t *io_gang_leader; 432e14bb325SJeff Bonwick zio_gang_node_t *io_gang_tree; 433e14bb325SJeff Bonwick void *io_executor; 434fa9e4066Sahrens void *io_waiter; 435fa9e4066Sahrens kmutex_t io_lock; 436fa9e4066Sahrens kcondvar_t io_cv; 437ea8dc4b6Seschrock 438ea8dc4b6Seschrock /* FMA state */ 43922fe2c88SJonathan Adams zio_cksum_report_t *io_cksum_report; 440ea8dc4b6Seschrock uint64_t io_ena; 4415aeb9474SGarrett D'Amore 4425aeb9474SGarrett D'Amore /* Taskq dispatching state */ 4435aeb9474SGarrett D'Amore taskq_ent_t io_tqent; 444fa9e4066Sahrens }; 445fa9e4066Sahrens 446a3f829aeSBill Moore extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, 447b24ab676SJeff Bonwick zio_done_func_t *done, void *private, enum zio_flag flags); 448fa9e4066Sahrens 449fa9e4066Sahrens extern zio_t *zio_root(spa_t *spa, 450b24ab676SJeff Bonwick zio_done_func_t *done, void *private, enum zio_flag flags); 451fa9e4066Sahrens 452088f3894Sahrens extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data, 453fa9e4066Sahrens uint64_t size, zio_done_func_t *done, void *private, 454b24ab676SJeff Bonwick int priority, enum zio_flag flags, const zbookmark_t *zb); 455fa9e4066Sahrens 456e14bb325SJeff Bonwick extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 457b24ab676SJeff Bonwick void *data, uint64_t size, const zio_prop_t *zp, 458e14bb325SJeff Bonwick zio_done_func_t *ready, zio_done_func_t *done, void *private, 459b24ab676SJeff Bonwick int priority, enum zio_flag flags, const zbookmark_t *zb); 460fa9e4066Sahrens 461e14bb325SJeff Bonwick extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, 462e14bb325SJeff Bonwick void *data, uint64_t size, zio_done_func_t *done, void *private, 463b24ab676SJeff Bonwick int priority, enum zio_flag flags, zbookmark_t *zb); 464fa9e4066Sahrens 46580901aeaSGeorge Wilson extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies, 46680901aeaSGeorge Wilson boolean_t nopwrite); 46782c9918fSTim Haley 468b24ab676SJeff Bonwick extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp); 469fa9e4066Sahrens 470b24ab676SJeff Bonwick extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, 471b24ab676SJeff Bonwick const blkptr_t *bp, 472b24ab676SJeff Bonwick zio_done_func_t *done, void *private, enum zio_flag flags); 473fa9e4066Sahrens 474fa9e4066Sahrens extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd, 475b24ab676SJeff Bonwick zio_done_func_t *done, void *private, int priority, enum zio_flag flags); 476fa9e4066Sahrens 477fa9e4066Sahrens extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 478fa9e4066Sahrens uint64_t size, void *data, int checksum, 479b24ab676SJeff Bonwick zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 480fa94a07fSbrendan boolean_t labels); 481fa9e4066Sahrens 482fa9e4066Sahrens extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, 483fa9e4066Sahrens uint64_t size, void *data, int checksum, 484b24ab676SJeff Bonwick zio_done_func_t *done, void *private, int priority, enum zio_flag flags, 485fa94a07fSbrendan boolean_t labels); 486fa9e4066Sahrens 487b24ab676SJeff Bonwick extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, 488b24ab676SJeff Bonwick const blkptr_t *bp, enum zio_flag flags); 489b24ab676SJeff Bonwick 490b24ab676SJeff Bonwick extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, 491b24ab676SJeff Bonwick blkptr_t *old_bp, uint64_t size, boolean_t use_slog); 492b24ab676SJeff Bonwick extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); 49317f17c2dSbonwick extern void zio_flush(zio_t *zio, vdev_t *vd); 4946e1f5caaSNeil Perrin extern void zio_shrink(zio_t *zio, uint64_t size); 495fa9e4066Sahrens 496fa9e4066Sahrens extern int zio_wait(zio_t *zio); 497fa9e4066Sahrens extern void zio_nowait(zio_t *zio); 498e05725b1Sbonwick extern void zio_execute(zio_t *zio); 499e05725b1Sbonwick extern void zio_interrupt(zio_t *zio); 500e05725b1Sbonwick 501a3f829aeSBill Moore extern zio_t *zio_walk_parents(zio_t *cio); 502a3f829aeSBill Moore extern zio_t *zio_walk_children(zio_t *pio); 503a3f829aeSBill Moore extern zio_t *zio_unique_parent(zio_t *cio); 504a3f829aeSBill Moore extern void zio_add_child(zio_t *pio, zio_t *cio); 505a3f829aeSBill Moore 506fa9e4066Sahrens extern void *zio_buf_alloc(size_t size); 507fa9e4066Sahrens extern void zio_buf_free(void *buf, size_t size); 508ad23a2dbSjohansen extern void *zio_data_buf_alloc(size_t size); 509ad23a2dbSjohansen extern void zio_data_buf_free(void *buf, size_t size); 510fa9e4066Sahrens 5110a4e9518Sgw extern void zio_resubmit_stage_async(void *); 512fa9e4066Sahrens 513fa9e4066Sahrens extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd, 514fa9e4066Sahrens uint64_t offset, void *data, uint64_t size, int type, int priority, 515b24ab676SJeff Bonwick enum zio_flag flags, zio_done_func_t *done, void *private); 516fa9e4066Sahrens 517e14bb325SJeff Bonwick extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, 518e14bb325SJeff Bonwick void *data, uint64_t size, int type, int priority, 519b24ab676SJeff Bonwick enum zio_flag flags, zio_done_func_t *done, void *private); 520e14bb325SJeff Bonwick 521fa9e4066Sahrens extern void zio_vdev_io_bypass(zio_t *zio); 522fa9e4066Sahrens extern void zio_vdev_io_reissue(zio_t *zio); 523fa9e4066Sahrens extern void zio_vdev_io_redone(zio_t *zio); 524fa9e4066Sahrens 525fa9e4066Sahrens extern void zio_checksum_verified(zio_t *zio); 526e14bb325SJeff Bonwick extern int zio_worst_error(int e1, int e2); 527fa9e4066Sahrens 528b24ab676SJeff Bonwick extern enum zio_checksum zio_checksum_select(enum zio_checksum child, 529b24ab676SJeff Bonwick enum zio_checksum parent); 530b24ab676SJeff Bonwick extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa, 531b24ab676SJeff Bonwick enum zio_checksum child, enum zio_checksum parent); 532b24ab676SJeff Bonwick extern enum zio_compress zio_compress_select(enum zio_compress child, 533b24ab676SJeff Bonwick enum zio_compress parent); 534fa9e4066Sahrens 535e14bb325SJeff Bonwick extern void zio_suspend(spa_t *spa, zio_t *zio); 53654d692b7SGeorge Wilson extern int zio_resume(spa_t *spa); 537e14bb325SJeff Bonwick extern void zio_resume_wait(spa_t *spa); 538ea8dc4b6Seschrock 539fa9e4066Sahrens /* 540fa9e4066Sahrens * Initial setup and teardown. 541fa9e4066Sahrens */ 542fa9e4066Sahrens extern void zio_init(void); 543fa9e4066Sahrens extern void zio_fini(void); 544fa9e4066Sahrens 545ea8dc4b6Seschrock /* 546ea8dc4b6Seschrock * Fault injection 547ea8dc4b6Seschrock */ 548ea8dc4b6Seschrock struct zinject_record; 549ea8dc4b6Seschrock extern uint32_t zio_injection_enabled; 550ea8dc4b6Seschrock extern int zio_inject_fault(char *name, int flags, int *id, 551ea8dc4b6Seschrock struct zinject_record *record); 552ea8dc4b6Seschrock extern int zio_inject_list_next(int *id, char *name, size_t buflen, 553ea8dc4b6Seschrock struct zinject_record *record); 554ea8dc4b6Seschrock extern int zio_clear_fault(int id); 5551195e687SMark J Musante extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type); 556ea8dc4b6Seschrock extern int zio_handle_fault_injection(zio_t *zio, int error); 5578956713aSEric Schrock extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error); 55821bf64a7Sgw extern int zio_handle_label_injection(zio_t *zio, int error); 559468c413aSTim Haley extern void zio_handle_ignored_writes(zio_t *zio); 560283b8460SGeorge.Wilson extern uint64_t zio_handle_io_delay(zio_t *zio); 561ea8dc4b6Seschrock 56222fe2c88SJonathan Adams /* 56322fe2c88SJonathan Adams * Checksum ereport functions 56422fe2c88SJonathan Adams */ 56522fe2c88SJonathan Adams extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio, 56622fe2c88SJonathan Adams uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info); 56722fe2c88SJonathan Adams extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report, 56822fe2c88SJonathan Adams const void *good_data, const void *bad_data, boolean_t drop_if_identical); 56922fe2c88SJonathan Adams 57022fe2c88SJonathan Adams extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report); 57122fe2c88SJonathan Adams extern void zfs_ereport_free_checksum(zio_cksum_report_t *report); 57222fe2c88SJonathan Adams 57322fe2c88SJonathan Adams /* If we have the good data in hand, this function can be used */ 57422fe2c88SJonathan Adams extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd, 57522fe2c88SJonathan Adams struct zio *zio, uint64_t offset, uint64_t length, 57622fe2c88SJonathan Adams const void *good_data, const void *bad_data, struct zio_bad_cksum *info); 57722fe2c88SJonathan Adams 578468c413aSTim Haley /* Called from spa_sync(), but primarily an injection handler */ 579468c413aSTim Haley extern void spa_handle_ignored_writes(spa_t *spa); 580468c413aSTim Haley 581ad135b5dSChristopher Siden /* zbookmark functions */ 582ad135b5dSChristopher Siden boolean_t zbookmark_is_before(const struct dnode_phys *dnp, 583ad135b5dSChristopher Siden const zbookmark_t *zb1, const zbookmark_t *zb2); 584ad135b5dSChristopher Siden 585fa9e4066Sahrens #ifdef __cplusplus 586fa9e4066Sahrens } 587fa9e4066Sahrens #endif 588fa9e4066Sahrens 589fa9e4066Sahrens #endif /* _ZIO_H */ 590