vdev.c revision 228103
1168404Spjd/* 2168404Spjd * CDDL HEADER START 3168404Spjd * 4168404Spjd * The contents of this file are subject to the terms of the 5168404Spjd * Common Development and Distribution License (the "License"). 6168404Spjd * You may not use this file except in compliance with the License. 7168404Spjd * 8168404Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9168404Spjd * or http://www.opensolaris.org/os/licensing. 10168404Spjd * See the License for the specific language governing permissions 11168404Spjd * and limitations under the License. 12168404Spjd * 13168404Spjd * When distributing Covered Code, include this CDDL HEADER in each 14168404Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15168404Spjd * If applicable, add the following below this CDDL HEADER, with the 16168404Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17168404Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18168404Spjd * 19168404Spjd * CDDL HEADER END 20168404Spjd */ 21168404Spjd 22168404Spjd/* 23219089Spjd * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24228103Smm * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25228103Smm * Copyright (c) 2011 by Delphix. All rights reserved. 26168404Spjd */ 27168404Spjd 28168404Spjd#include <sys/zfs_context.h> 29168404Spjd#include <sys/fm/fs/zfs.h> 30168404Spjd#include <sys/spa.h> 31168404Spjd#include <sys/spa_impl.h> 32168404Spjd#include <sys/dmu.h> 33168404Spjd#include <sys/dmu_tx.h> 34168404Spjd#include <sys/vdev_impl.h> 35168404Spjd#include <sys/uberblock_impl.h> 36168404Spjd#include <sys/metaslab.h> 37168404Spjd#include <sys/metaslab_impl.h> 38168404Spjd#include <sys/space_map.h> 39168404Spjd#include <sys/zio.h> 40168404Spjd#include <sys/zap.h> 41168404Spjd#include <sys/fs/zfs.h> 42185029Spjd#include <sys/arc.h> 43213197Smm#include <sys/zil.h> 44219089Spjd#include <sys/dsl_scan.h> 45168404Spjd 46168404SpjdSYSCTL_DECL(_vfs_zfs); 47168404SpjdSYSCTL_NODE(_vfs_zfs, OID_AUTO, vdev, CTLFLAG_RW, 0, "ZFS VDEV"); 48168404Spjd 49168404Spjd/* 50168404Spjd * Virtual device management. 51168404Spjd */ 52168404Spjd 53168404Spjdstatic vdev_ops_t *vdev_ops_table[] = { 54168404Spjd &vdev_root_ops, 55168404Spjd &vdev_raidz_ops, 56168404Spjd &vdev_mirror_ops, 57168404Spjd &vdev_replacing_ops, 58168404Spjd &vdev_spare_ops, 59168404Spjd#ifdef _KERNEL 60168404Spjd &vdev_geom_ops, 61168404Spjd#else 62168404Spjd &vdev_disk_ops, 63185029Spjd#endif 64168404Spjd &vdev_file_ops, 65168404Spjd &vdev_missing_ops, 66219089Spjd &vdev_hole_ops, 67168404Spjd NULL 68168404Spjd}; 69168404Spjd 70185029Spjd/* maximum scrub/resilver I/O queue per leaf vdev */ 71185029Spjdint zfs_scrub_limit = 10; 72168404Spjd 73185029SpjdTUNABLE_INT("vfs.zfs.scrub_limit", &zfs_scrub_limit); 74185029SpjdSYSCTL_INT(_vfs_zfs, OID_AUTO, scrub_limit, CTLFLAG_RDTUN, &zfs_scrub_limit, 0, 75185029Spjd "Maximum scrub/resilver I/O queue"); 76185029Spjd 77168404Spjd/* 78168404Spjd * Given a vdev type, return the appropriate ops vector. 79168404Spjd */ 80168404Spjdstatic vdev_ops_t * 81168404Spjdvdev_getops(const char *type) 82168404Spjd{ 83168404Spjd vdev_ops_t *ops, **opspp; 84168404Spjd 85168404Spjd for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) 86168404Spjd if (strcmp(ops->vdev_op_type, type) == 0) 87168404Spjd break; 88168404Spjd 89168404Spjd return (ops); 90168404Spjd} 91168404Spjd 92168404Spjd/* 93168404Spjd * Default asize function: return the MAX of psize with the asize of 94168404Spjd * all children. This is what's used by anything other than RAID-Z. 95168404Spjd */ 96168404Spjduint64_t 97168404Spjdvdev_default_asize(vdev_t *vd, uint64_t psize) 98168404Spjd{ 99168404Spjd uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); 100168404Spjd uint64_t csize; 101168404Spjd 102219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 103168404Spjd csize = vdev_psize_to_asize(vd->vdev_child[c], psize); 104168404Spjd asize = MAX(asize, csize); 105168404Spjd } 106168404Spjd 107168404Spjd return (asize); 108168404Spjd} 109168404Spjd 110168404Spjd/* 111219089Spjd * Get the minimum allocatable size. We define the allocatable size as 112219089Spjd * the vdev's asize rounded to the nearest metaslab. This allows us to 113219089Spjd * replace or attach devices which don't have the same physical size but 114219089Spjd * can still satisfy the same number of allocations. 115168404Spjd */ 116168404Spjduint64_t 117219089Spjdvdev_get_min_asize(vdev_t *vd) 118168404Spjd{ 119219089Spjd vdev_t *pvd = vd->vdev_parent; 120168404Spjd 121219089Spjd /* 122219089Spjd * The our parent is NULL (inactive spare or cache) or is the root, 123219089Spjd * just return our own asize. 124219089Spjd */ 125219089Spjd if (pvd == NULL) 126219089Spjd return (vd->vdev_asize); 127168404Spjd 128168404Spjd /* 129219089Spjd * The top-level vdev just returns the allocatable size rounded 130219089Spjd * to the nearest metaslab. 131168404Spjd */ 132219089Spjd if (vd == vd->vdev_top) 133219089Spjd return (P2ALIGN(vd->vdev_asize, 1ULL << vd->vdev_ms_shift)); 134168404Spjd 135219089Spjd /* 136219089Spjd * The allocatable space for a raidz vdev is N * sizeof(smallest child), 137219089Spjd * so each child must provide at least 1/Nth of its asize. 138219089Spjd */ 139219089Spjd if (pvd->vdev_ops == &vdev_raidz_ops) 140219089Spjd return (pvd->vdev_min_asize / pvd->vdev_children); 141168404Spjd 142219089Spjd return (pvd->vdev_min_asize); 143219089Spjd} 144168404Spjd 145219089Spjdvoid 146219089Spjdvdev_set_min_asize(vdev_t *vd) 147219089Spjd{ 148219089Spjd vd->vdev_min_asize = vdev_get_min_asize(vd); 149219089Spjd 150219089Spjd for (int c = 0; c < vd->vdev_children; c++) 151219089Spjd vdev_set_min_asize(vd->vdev_child[c]); 152168404Spjd} 153168404Spjd 154168404Spjdvdev_t * 155168404Spjdvdev_lookup_top(spa_t *spa, uint64_t vdev) 156168404Spjd{ 157168404Spjd vdev_t *rvd = spa->spa_root_vdev; 158168404Spjd 159185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 160185029Spjd 161185029Spjd if (vdev < rvd->vdev_children) { 162185029Spjd ASSERT(rvd->vdev_child[vdev] != NULL); 163168404Spjd return (rvd->vdev_child[vdev]); 164185029Spjd } 165168404Spjd 166168404Spjd return (NULL); 167168404Spjd} 168168404Spjd 169168404Spjdvdev_t * 170168404Spjdvdev_lookup_by_guid(vdev_t *vd, uint64_t guid) 171168404Spjd{ 172168404Spjd vdev_t *mvd; 173168404Spjd 174168404Spjd if (vd->vdev_guid == guid) 175168404Spjd return (vd); 176168404Spjd 177219089Spjd for (int c = 0; c < vd->vdev_children; c++) 178168404Spjd if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != 179168404Spjd NULL) 180168404Spjd return (mvd); 181168404Spjd 182168404Spjd return (NULL); 183168404Spjd} 184168404Spjd 185168404Spjdvoid 186168404Spjdvdev_add_child(vdev_t *pvd, vdev_t *cvd) 187168404Spjd{ 188168404Spjd size_t oldsize, newsize; 189168404Spjd uint64_t id = cvd->vdev_id; 190168404Spjd vdev_t **newchild; 191168404Spjd 192185029Spjd ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 193168404Spjd ASSERT(cvd->vdev_parent == NULL); 194168404Spjd 195168404Spjd cvd->vdev_parent = pvd; 196168404Spjd 197168404Spjd if (pvd == NULL) 198168404Spjd return; 199168404Spjd 200168404Spjd ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); 201168404Spjd 202168404Spjd oldsize = pvd->vdev_children * sizeof (vdev_t *); 203168404Spjd pvd->vdev_children = MAX(pvd->vdev_children, id + 1); 204168404Spjd newsize = pvd->vdev_children * sizeof (vdev_t *); 205168404Spjd 206168404Spjd newchild = kmem_zalloc(newsize, KM_SLEEP); 207168404Spjd if (pvd->vdev_child != NULL) { 208168404Spjd bcopy(pvd->vdev_child, newchild, oldsize); 209168404Spjd kmem_free(pvd->vdev_child, oldsize); 210168404Spjd } 211168404Spjd 212168404Spjd pvd->vdev_child = newchild; 213168404Spjd pvd->vdev_child[id] = cvd; 214168404Spjd 215168404Spjd cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); 216168404Spjd ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); 217168404Spjd 218168404Spjd /* 219168404Spjd * Walk up all ancestors to update guid sum. 220168404Spjd */ 221168404Spjd for (; pvd != NULL; pvd = pvd->vdev_parent) 222168404Spjd pvd->vdev_guid_sum += cvd->vdev_guid_sum; 223168404Spjd} 224168404Spjd 225168404Spjdvoid 226168404Spjdvdev_remove_child(vdev_t *pvd, vdev_t *cvd) 227168404Spjd{ 228168404Spjd int c; 229168404Spjd uint_t id = cvd->vdev_id; 230168404Spjd 231168404Spjd ASSERT(cvd->vdev_parent == pvd); 232168404Spjd 233168404Spjd if (pvd == NULL) 234168404Spjd return; 235168404Spjd 236168404Spjd ASSERT(id < pvd->vdev_children); 237168404Spjd ASSERT(pvd->vdev_child[id] == cvd); 238168404Spjd 239168404Spjd pvd->vdev_child[id] = NULL; 240168404Spjd cvd->vdev_parent = NULL; 241168404Spjd 242168404Spjd for (c = 0; c < pvd->vdev_children; c++) 243168404Spjd if (pvd->vdev_child[c]) 244168404Spjd break; 245168404Spjd 246168404Spjd if (c == pvd->vdev_children) { 247168404Spjd kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); 248168404Spjd pvd->vdev_child = NULL; 249168404Spjd pvd->vdev_children = 0; 250168404Spjd } 251168404Spjd 252168404Spjd /* 253168404Spjd * Walk up all ancestors to update guid sum. 254168404Spjd */ 255168404Spjd for (; pvd != NULL; pvd = pvd->vdev_parent) 256168404Spjd pvd->vdev_guid_sum -= cvd->vdev_guid_sum; 257168404Spjd} 258168404Spjd 259168404Spjd/* 260168404Spjd * Remove any holes in the child array. 261168404Spjd */ 262168404Spjdvoid 263168404Spjdvdev_compact_children(vdev_t *pvd) 264168404Spjd{ 265168404Spjd vdev_t **newchild, *cvd; 266168404Spjd int oldc = pvd->vdev_children; 267219089Spjd int newc; 268168404Spjd 269185029Spjd ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 270168404Spjd 271219089Spjd for (int c = newc = 0; c < oldc; c++) 272168404Spjd if (pvd->vdev_child[c]) 273168404Spjd newc++; 274168404Spjd 275168404Spjd newchild = kmem_alloc(newc * sizeof (vdev_t *), KM_SLEEP); 276168404Spjd 277219089Spjd for (int c = newc = 0; c < oldc; c++) { 278168404Spjd if ((cvd = pvd->vdev_child[c]) != NULL) { 279168404Spjd newchild[newc] = cvd; 280168404Spjd cvd->vdev_id = newc++; 281168404Spjd } 282168404Spjd } 283168404Spjd 284168404Spjd kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); 285168404Spjd pvd->vdev_child = newchild; 286168404Spjd pvd->vdev_children = newc; 287168404Spjd} 288168404Spjd 289168404Spjd/* 290168404Spjd * Allocate and minimally initialize a vdev_t. 291168404Spjd */ 292219089Spjdvdev_t * 293168404Spjdvdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) 294168404Spjd{ 295168404Spjd vdev_t *vd; 296168404Spjd 297168404Spjd vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP); 298168404Spjd 299168404Spjd if (spa->spa_root_vdev == NULL) { 300168404Spjd ASSERT(ops == &vdev_root_ops); 301168404Spjd spa->spa_root_vdev = vd; 302228103Smm spa->spa_load_guid = spa_generate_guid(NULL); 303168404Spjd } 304168404Spjd 305219089Spjd if (guid == 0 && ops != &vdev_hole_ops) { 306168404Spjd if (spa->spa_root_vdev == vd) { 307168404Spjd /* 308168404Spjd * The root vdev's guid will also be the pool guid, 309168404Spjd * which must be unique among all pools. 310168404Spjd */ 311219089Spjd guid = spa_generate_guid(NULL); 312168404Spjd } else { 313168404Spjd /* 314168404Spjd * Any other vdev's guid must be unique within the pool. 315168404Spjd */ 316219089Spjd guid = spa_generate_guid(spa); 317168404Spjd } 318168404Spjd ASSERT(!spa_guid_exists(spa_guid(spa), guid)); 319168404Spjd } 320168404Spjd 321168404Spjd vd->vdev_spa = spa; 322168404Spjd vd->vdev_id = id; 323168404Spjd vd->vdev_guid = guid; 324168404Spjd vd->vdev_guid_sum = guid; 325168404Spjd vd->vdev_ops = ops; 326168404Spjd vd->vdev_state = VDEV_STATE_CLOSED; 327219089Spjd vd->vdev_ishole = (ops == &vdev_hole_ops); 328168404Spjd 329168404Spjd mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_DEFAULT, NULL); 330168404Spjd mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); 331185029Spjd mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL); 332209962Smm for (int t = 0; t < DTL_TYPES; t++) { 333209962Smm space_map_create(&vd->vdev_dtl[t], 0, -1ULL, 0, 334209962Smm &vd->vdev_dtl_lock); 335209962Smm } 336168404Spjd txg_list_create(&vd->vdev_ms_list, 337168404Spjd offsetof(struct metaslab, ms_txg_node)); 338168404Spjd txg_list_create(&vd->vdev_dtl_list, 339168404Spjd offsetof(struct vdev, vdev_dtl_node)); 340168404Spjd vd->vdev_stat.vs_timestamp = gethrtime(); 341185029Spjd vdev_queue_init(vd); 342185029Spjd vdev_cache_init(vd); 343168404Spjd 344168404Spjd return (vd); 345168404Spjd} 346168404Spjd 347168404Spjd/* 348168404Spjd * Allocate a new vdev. The 'alloctype' is used to control whether we are 349168404Spjd * creating a new vdev or loading an existing one - the behavior is slightly 350168404Spjd * different for each case. 351168404Spjd */ 352168404Spjdint 353168404Spjdvdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, 354168404Spjd int alloctype) 355168404Spjd{ 356168404Spjd vdev_ops_t *ops; 357168404Spjd char *type; 358185029Spjd uint64_t guid = 0, islog, nparity; 359168404Spjd vdev_t *vd; 360168404Spjd 361185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 362168404Spjd 363168404Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) 364168404Spjd return (EINVAL); 365168404Spjd 366168404Spjd if ((ops = vdev_getops(type)) == NULL) 367168404Spjd return (EINVAL); 368168404Spjd 369168404Spjd /* 370168404Spjd * If this is a load, get the vdev guid from the nvlist. 371168404Spjd * Otherwise, vdev_alloc_common() will generate one for us. 372168404Spjd */ 373168404Spjd if (alloctype == VDEV_ALLOC_LOAD) { 374168404Spjd uint64_t label_id; 375168404Spjd 376168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || 377168404Spjd label_id != id) 378168404Spjd return (EINVAL); 379168404Spjd 380168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 381168404Spjd return (EINVAL); 382168404Spjd } else if (alloctype == VDEV_ALLOC_SPARE) { 383168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 384168404Spjd return (EINVAL); 385185029Spjd } else if (alloctype == VDEV_ALLOC_L2CACHE) { 386185029Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 387185029Spjd return (EINVAL); 388219089Spjd } else if (alloctype == VDEV_ALLOC_ROOTPOOL) { 389219089Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 390219089Spjd return (EINVAL); 391168404Spjd } 392168404Spjd 393168404Spjd /* 394168404Spjd * The first allocated vdev must be of type 'root'. 395168404Spjd */ 396168404Spjd if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) 397168404Spjd return (EINVAL); 398168404Spjd 399185029Spjd /* 400185029Spjd * Determine whether we're a log vdev. 401185029Spjd */ 402185029Spjd islog = 0; 403185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); 404185029Spjd if (islog && spa_version(spa) < SPA_VERSION_SLOGS) 405185029Spjd return (ENOTSUP); 406168404Spjd 407219089Spjd if (ops == &vdev_hole_ops && spa_version(spa) < SPA_VERSION_HOLES) 408219089Spjd return (ENOTSUP); 409219089Spjd 410168404Spjd /* 411185029Spjd * Set the nparity property for RAID-Z vdevs. 412168404Spjd */ 413185029Spjd nparity = -1ULL; 414168404Spjd if (ops == &vdev_raidz_ops) { 415168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, 416185029Spjd &nparity) == 0) { 417219089Spjd if (nparity == 0 || nparity > VDEV_RAIDZ_MAXPARITY) 418168404Spjd return (EINVAL); 419168404Spjd /* 420219089Spjd * Previous versions could only support 1 or 2 parity 421219089Spjd * device. 422168404Spjd */ 423219089Spjd if (nparity > 1 && 424219089Spjd spa_version(spa) < SPA_VERSION_RAIDZ2) 425168404Spjd return (ENOTSUP); 426219089Spjd if (nparity > 2 && 427219089Spjd spa_version(spa) < SPA_VERSION_RAIDZ3) 428219089Spjd return (ENOTSUP); 429168404Spjd } else { 430168404Spjd /* 431168404Spjd * We require the parity to be specified for SPAs that 432168404Spjd * support multiple parity levels. 433168404Spjd */ 434219089Spjd if (spa_version(spa) >= SPA_VERSION_RAIDZ2) 435168404Spjd return (EINVAL); 436168404Spjd /* 437168404Spjd * Otherwise, we default to 1 parity device for RAID-Z. 438168404Spjd */ 439185029Spjd nparity = 1; 440168404Spjd } 441168404Spjd } else { 442185029Spjd nparity = 0; 443168404Spjd } 444185029Spjd ASSERT(nparity != -1ULL); 445168404Spjd 446185029Spjd vd = vdev_alloc_common(spa, id, guid, ops); 447185029Spjd 448185029Spjd vd->vdev_islog = islog; 449185029Spjd vd->vdev_nparity = nparity; 450185029Spjd 451185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) 452185029Spjd vd->vdev_path = spa_strdup(vd->vdev_path); 453185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) 454185029Spjd vd->vdev_devid = spa_strdup(vd->vdev_devid); 455185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, 456185029Spjd &vd->vdev_physpath) == 0) 457185029Spjd vd->vdev_physpath = spa_strdup(vd->vdev_physpath); 458209962Smm if (nvlist_lookup_string(nv, ZPOOL_CONFIG_FRU, &vd->vdev_fru) == 0) 459209962Smm vd->vdev_fru = spa_strdup(vd->vdev_fru); 460185029Spjd 461168404Spjd /* 462168404Spjd * Set the whole_disk property. If it's not specified, leave the value 463168404Spjd * as -1. 464168404Spjd */ 465168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, 466168404Spjd &vd->vdev_wholedisk) != 0) 467168404Spjd vd->vdev_wholedisk = -1ULL; 468168404Spjd 469168404Spjd /* 470168404Spjd * Look for the 'not present' flag. This will only be set if the device 471168404Spjd * was not present at the time of import. 472168404Spjd */ 473209962Smm (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, 474209962Smm &vd->vdev_not_present); 475168404Spjd 476168404Spjd /* 477168404Spjd * Get the alignment requirement. 478168404Spjd */ 479168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); 480168404Spjd 481168404Spjd /* 482219089Spjd * Retrieve the vdev creation time. 483219089Spjd */ 484219089Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_CREATE_TXG, 485219089Spjd &vd->vdev_crtxg); 486219089Spjd 487219089Spjd /* 488168404Spjd * If we're a top-level vdev, try to load the allocation parameters. 489168404Spjd */ 490219089Spjd if (parent && !parent->vdev_parent && 491219089Spjd (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) { 492168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, 493168404Spjd &vd->vdev_ms_array); 494168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, 495168404Spjd &vd->vdev_ms_shift); 496168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, 497168404Spjd &vd->vdev_asize); 498219089Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVING, 499219089Spjd &vd->vdev_removing); 500168404Spjd } 501168404Spjd 502219089Spjd if (parent && !parent->vdev_parent) { 503219089Spjd ASSERT(alloctype == VDEV_ALLOC_LOAD || 504219089Spjd alloctype == VDEV_ALLOC_ADD || 505219089Spjd alloctype == VDEV_ALLOC_SPLIT || 506219089Spjd alloctype == VDEV_ALLOC_ROOTPOOL); 507219089Spjd vd->vdev_mg = metaslab_group_create(islog ? 508219089Spjd spa_log_class(spa) : spa_normal_class(spa), vd); 509219089Spjd } 510219089Spjd 511168404Spjd /* 512185029Spjd * If we're a leaf vdev, try to load the DTL object and other state. 513168404Spjd */ 514185029Spjd if (vd->vdev_ops->vdev_op_leaf && 515219089Spjd (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE || 516219089Spjd alloctype == VDEV_ALLOC_ROOTPOOL)) { 517185029Spjd if (alloctype == VDEV_ALLOC_LOAD) { 518185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, 519209962Smm &vd->vdev_dtl_smo.smo_object); 520185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, 521185029Spjd &vd->vdev_unspare); 522185029Spjd } 523219089Spjd 524219089Spjd if (alloctype == VDEV_ALLOC_ROOTPOOL) { 525219089Spjd uint64_t spare = 0; 526219089Spjd 527219089Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE, 528219089Spjd &spare) == 0 && spare) 529219089Spjd spa_spare_add(vd); 530219089Spjd } 531219089Spjd 532168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, 533168404Spjd &vd->vdev_offline); 534185029Spjd 535219089Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_RESILVERING, 536219089Spjd &vd->vdev_resilvering); 537219089Spjd 538185029Spjd /* 539185029Spjd * When importing a pool, we want to ignore the persistent fault 540185029Spjd * state, as the diagnosis made on another system may not be 541219089Spjd * valid in the current context. Local vdevs will 542219089Spjd * remain in the faulted state. 543185029Spjd */ 544219089Spjd if (spa_load_state(spa) == SPA_LOAD_OPEN) { 545185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, 546185029Spjd &vd->vdev_faulted); 547185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, 548185029Spjd &vd->vdev_degraded); 549185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, 550185029Spjd &vd->vdev_removed); 551219089Spjd 552219089Spjd if (vd->vdev_faulted || vd->vdev_degraded) { 553219089Spjd char *aux; 554219089Spjd 555219089Spjd vd->vdev_label_aux = 556219089Spjd VDEV_AUX_ERR_EXCEEDED; 557219089Spjd if (nvlist_lookup_string(nv, 558219089Spjd ZPOOL_CONFIG_AUX_STATE, &aux) == 0 && 559219089Spjd strcmp(aux, "external") == 0) 560219089Spjd vd->vdev_label_aux = VDEV_AUX_EXTERNAL; 561219089Spjd } 562185029Spjd } 563168404Spjd } 564168404Spjd 565168404Spjd /* 566168404Spjd * Add ourselves to the parent's list of children. 567168404Spjd */ 568168404Spjd vdev_add_child(parent, vd); 569168404Spjd 570168404Spjd *vdp = vd; 571168404Spjd 572168404Spjd return (0); 573168404Spjd} 574168404Spjd 575168404Spjdvoid 576168404Spjdvdev_free(vdev_t *vd) 577168404Spjd{ 578185029Spjd spa_t *spa = vd->vdev_spa; 579168404Spjd 580168404Spjd /* 581168404Spjd * vdev_free() implies closing the vdev first. This is simpler than 582168404Spjd * trying to ensure complicated semantics for all callers. 583168404Spjd */ 584168404Spjd vdev_close(vd); 585168404Spjd 586185029Spjd ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); 587219089Spjd ASSERT(!list_link_active(&vd->vdev_state_dirty_node)); 588168404Spjd 589168404Spjd /* 590168404Spjd * Free all children. 591168404Spjd */ 592219089Spjd for (int c = 0; c < vd->vdev_children; c++) 593168404Spjd vdev_free(vd->vdev_child[c]); 594168404Spjd 595168404Spjd ASSERT(vd->vdev_child == NULL); 596168404Spjd ASSERT(vd->vdev_guid_sum == vd->vdev_guid); 597168404Spjd 598168404Spjd /* 599168404Spjd * Discard allocation state. 600168404Spjd */ 601219089Spjd if (vd->vdev_mg != NULL) { 602168404Spjd vdev_metaslab_fini(vd); 603219089Spjd metaslab_group_destroy(vd->vdev_mg); 604219089Spjd } 605168404Spjd 606168404Spjd ASSERT3U(vd->vdev_stat.vs_space, ==, 0); 607168404Spjd ASSERT3U(vd->vdev_stat.vs_dspace, ==, 0); 608168404Spjd ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0); 609168404Spjd 610168404Spjd /* 611168404Spjd * Remove this vdev from its parent's child list. 612168404Spjd */ 613168404Spjd vdev_remove_child(vd->vdev_parent, vd); 614168404Spjd 615168404Spjd ASSERT(vd->vdev_parent == NULL); 616168404Spjd 617185029Spjd /* 618185029Spjd * Clean up vdev structure. 619185029Spjd */ 620185029Spjd vdev_queue_fini(vd); 621185029Spjd vdev_cache_fini(vd); 622185029Spjd 623185029Spjd if (vd->vdev_path) 624185029Spjd spa_strfree(vd->vdev_path); 625185029Spjd if (vd->vdev_devid) 626185029Spjd spa_strfree(vd->vdev_devid); 627185029Spjd if (vd->vdev_physpath) 628185029Spjd spa_strfree(vd->vdev_physpath); 629209962Smm if (vd->vdev_fru) 630209962Smm spa_strfree(vd->vdev_fru); 631185029Spjd 632185029Spjd if (vd->vdev_isspare) 633185029Spjd spa_spare_remove(vd); 634185029Spjd if (vd->vdev_isl2cache) 635185029Spjd spa_l2cache_remove(vd); 636185029Spjd 637185029Spjd txg_list_destroy(&vd->vdev_ms_list); 638185029Spjd txg_list_destroy(&vd->vdev_dtl_list); 639209962Smm 640185029Spjd mutex_enter(&vd->vdev_dtl_lock); 641209962Smm for (int t = 0; t < DTL_TYPES; t++) { 642209962Smm space_map_unload(&vd->vdev_dtl[t]); 643209962Smm space_map_destroy(&vd->vdev_dtl[t]); 644209962Smm } 645185029Spjd mutex_exit(&vd->vdev_dtl_lock); 646209962Smm 647185029Spjd mutex_destroy(&vd->vdev_dtl_lock); 648185029Spjd mutex_destroy(&vd->vdev_stat_lock); 649185029Spjd mutex_destroy(&vd->vdev_probe_lock); 650185029Spjd 651185029Spjd if (vd == spa->spa_root_vdev) 652185029Spjd spa->spa_root_vdev = NULL; 653185029Spjd 654185029Spjd kmem_free(vd, sizeof (vdev_t)); 655168404Spjd} 656168404Spjd 657168404Spjd/* 658168404Spjd * Transfer top-level vdev state from svd to tvd. 659168404Spjd */ 660168404Spjdstatic void 661168404Spjdvdev_top_transfer(vdev_t *svd, vdev_t *tvd) 662168404Spjd{ 663168404Spjd spa_t *spa = svd->vdev_spa; 664168404Spjd metaslab_t *msp; 665168404Spjd vdev_t *vd; 666168404Spjd int t; 667168404Spjd 668168404Spjd ASSERT(tvd == tvd->vdev_top); 669168404Spjd 670168404Spjd tvd->vdev_ms_array = svd->vdev_ms_array; 671168404Spjd tvd->vdev_ms_shift = svd->vdev_ms_shift; 672168404Spjd tvd->vdev_ms_count = svd->vdev_ms_count; 673168404Spjd 674168404Spjd svd->vdev_ms_array = 0; 675168404Spjd svd->vdev_ms_shift = 0; 676168404Spjd svd->vdev_ms_count = 0; 677168404Spjd 678168404Spjd tvd->vdev_mg = svd->vdev_mg; 679168404Spjd tvd->vdev_ms = svd->vdev_ms; 680168404Spjd 681168404Spjd svd->vdev_mg = NULL; 682168404Spjd svd->vdev_ms = NULL; 683168404Spjd 684168404Spjd if (tvd->vdev_mg != NULL) 685168404Spjd tvd->vdev_mg->mg_vd = tvd; 686168404Spjd 687168404Spjd tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; 688168404Spjd tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; 689168404Spjd tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; 690168404Spjd 691168404Spjd svd->vdev_stat.vs_alloc = 0; 692168404Spjd svd->vdev_stat.vs_space = 0; 693168404Spjd svd->vdev_stat.vs_dspace = 0; 694168404Spjd 695168404Spjd for (t = 0; t < TXG_SIZE; t++) { 696168404Spjd while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) 697168404Spjd (void) txg_list_add(&tvd->vdev_ms_list, msp, t); 698168404Spjd while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) 699168404Spjd (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); 700168404Spjd if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) 701168404Spjd (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); 702168404Spjd } 703168404Spjd 704185029Spjd if (list_link_active(&svd->vdev_config_dirty_node)) { 705168404Spjd vdev_config_clean(svd); 706168404Spjd vdev_config_dirty(tvd); 707168404Spjd } 708168404Spjd 709185029Spjd if (list_link_active(&svd->vdev_state_dirty_node)) { 710185029Spjd vdev_state_clean(svd); 711185029Spjd vdev_state_dirty(tvd); 712185029Spjd } 713168404Spjd 714168404Spjd tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; 715168404Spjd svd->vdev_deflate_ratio = 0; 716185029Spjd 717185029Spjd tvd->vdev_islog = svd->vdev_islog; 718185029Spjd svd->vdev_islog = 0; 719168404Spjd} 720168404Spjd 721168404Spjdstatic void 722168404Spjdvdev_top_update(vdev_t *tvd, vdev_t *vd) 723168404Spjd{ 724168404Spjd if (vd == NULL) 725168404Spjd return; 726168404Spjd 727168404Spjd vd->vdev_top = tvd; 728168404Spjd 729219089Spjd for (int c = 0; c < vd->vdev_children; c++) 730168404Spjd vdev_top_update(tvd, vd->vdev_child[c]); 731168404Spjd} 732168404Spjd 733168404Spjd/* 734168404Spjd * Add a mirror/replacing vdev above an existing vdev. 735168404Spjd */ 736168404Spjdvdev_t * 737168404Spjdvdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) 738168404Spjd{ 739168404Spjd spa_t *spa = cvd->vdev_spa; 740168404Spjd vdev_t *pvd = cvd->vdev_parent; 741168404Spjd vdev_t *mvd; 742168404Spjd 743185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 744168404Spjd 745168404Spjd mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); 746168404Spjd 747168404Spjd mvd->vdev_asize = cvd->vdev_asize; 748219089Spjd mvd->vdev_min_asize = cvd->vdev_min_asize; 749168404Spjd mvd->vdev_ashift = cvd->vdev_ashift; 750168404Spjd mvd->vdev_state = cvd->vdev_state; 751219089Spjd mvd->vdev_crtxg = cvd->vdev_crtxg; 752168404Spjd 753168404Spjd vdev_remove_child(pvd, cvd); 754168404Spjd vdev_add_child(pvd, mvd); 755168404Spjd cvd->vdev_id = mvd->vdev_children; 756168404Spjd vdev_add_child(mvd, cvd); 757168404Spjd vdev_top_update(cvd->vdev_top, cvd->vdev_top); 758168404Spjd 759168404Spjd if (mvd == mvd->vdev_top) 760168404Spjd vdev_top_transfer(cvd, mvd); 761168404Spjd 762168404Spjd return (mvd); 763168404Spjd} 764168404Spjd 765168404Spjd/* 766168404Spjd * Remove a 1-way mirror/replacing vdev from the tree. 767168404Spjd */ 768168404Spjdvoid 769168404Spjdvdev_remove_parent(vdev_t *cvd) 770168404Spjd{ 771168404Spjd vdev_t *mvd = cvd->vdev_parent; 772168404Spjd vdev_t *pvd = mvd->vdev_parent; 773168404Spjd 774185029Spjd ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 775168404Spjd 776168404Spjd ASSERT(mvd->vdev_children == 1); 777168404Spjd ASSERT(mvd->vdev_ops == &vdev_mirror_ops || 778168404Spjd mvd->vdev_ops == &vdev_replacing_ops || 779168404Spjd mvd->vdev_ops == &vdev_spare_ops); 780168404Spjd cvd->vdev_ashift = mvd->vdev_ashift; 781168404Spjd 782168404Spjd vdev_remove_child(mvd, cvd); 783168404Spjd vdev_remove_child(pvd, mvd); 784209962Smm 785185029Spjd /* 786185029Spjd * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. 787185029Spjd * Otherwise, we could have detached an offline device, and when we 788185029Spjd * go to import the pool we'll think we have two top-level vdevs, 789185029Spjd * instead of a different version of the same top-level vdev. 790185029Spjd */ 791209962Smm if (mvd->vdev_top == mvd) { 792209962Smm uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid; 793219089Spjd cvd->vdev_orig_guid = cvd->vdev_guid; 794209962Smm cvd->vdev_guid += guid_delta; 795209962Smm cvd->vdev_guid_sum += guid_delta; 796209962Smm } 797168404Spjd cvd->vdev_id = mvd->vdev_id; 798168404Spjd vdev_add_child(pvd, cvd); 799168404Spjd vdev_top_update(cvd->vdev_top, cvd->vdev_top); 800168404Spjd 801168404Spjd if (cvd == cvd->vdev_top) 802168404Spjd vdev_top_transfer(mvd, cvd); 803168404Spjd 804168404Spjd ASSERT(mvd->vdev_children == 0); 805168404Spjd vdev_free(mvd); 806168404Spjd} 807168404Spjd 808168404Spjdint 809168404Spjdvdev_metaslab_init(vdev_t *vd, uint64_t txg) 810168404Spjd{ 811168404Spjd spa_t *spa = vd->vdev_spa; 812168404Spjd objset_t *mos = spa->spa_meta_objset; 813168404Spjd uint64_t m; 814168404Spjd uint64_t oldc = vd->vdev_ms_count; 815168404Spjd uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; 816168404Spjd metaslab_t **mspp; 817168404Spjd int error; 818168404Spjd 819219089Spjd ASSERT(txg == 0 || spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 820219089Spjd 821219089Spjd /* 822219089Spjd * This vdev is not being allocated from yet or is a hole. 823219089Spjd */ 824219089Spjd if (vd->vdev_ms_shift == 0) 825168404Spjd return (0); 826168404Spjd 827219089Spjd ASSERT(!vd->vdev_ishole); 828219089Spjd 829213197Smm /* 830213197Smm * Compute the raidz-deflation ratio. Note, we hard-code 831213197Smm * in 128k (1 << 17) because it is the current "typical" blocksize. 832213197Smm * Even if SPA_MAXBLOCKSIZE changes, this algorithm must never change, 833213197Smm * or we will inconsistently account for existing bp's. 834213197Smm */ 835213197Smm vd->vdev_deflate_ratio = (1 << 17) / 836213197Smm (vdev_psize_to_asize(vd, 1 << 17) >> SPA_MINBLOCKSHIFT); 837213197Smm 838168404Spjd ASSERT(oldc <= newc); 839168404Spjd 840168404Spjd mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); 841168404Spjd 842168404Spjd if (oldc != 0) { 843168404Spjd bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); 844168404Spjd kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); 845168404Spjd } 846168404Spjd 847168404Spjd vd->vdev_ms = mspp; 848168404Spjd vd->vdev_ms_count = newc; 849168404Spjd 850168404Spjd for (m = oldc; m < newc; m++) { 851168404Spjd space_map_obj_t smo = { 0, 0, 0 }; 852168404Spjd if (txg == 0) { 853168404Spjd uint64_t object = 0; 854168404Spjd error = dmu_read(mos, vd->vdev_ms_array, 855209962Smm m * sizeof (uint64_t), sizeof (uint64_t), &object, 856209962Smm DMU_READ_PREFETCH); 857168404Spjd if (error) 858168404Spjd return (error); 859168404Spjd if (object != 0) { 860168404Spjd dmu_buf_t *db; 861168404Spjd error = dmu_bonus_hold(mos, object, FTAG, &db); 862168404Spjd if (error) 863168404Spjd return (error); 864185029Spjd ASSERT3U(db->db_size, >=, sizeof (smo)); 865185029Spjd bcopy(db->db_data, &smo, sizeof (smo)); 866168404Spjd ASSERT3U(smo.smo_object, ==, object); 867168404Spjd dmu_buf_rele(db, FTAG); 868168404Spjd } 869168404Spjd } 870168404Spjd vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, 871168404Spjd m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); 872168404Spjd } 873168404Spjd 874219089Spjd if (txg == 0) 875219089Spjd spa_config_enter(spa, SCL_ALLOC, FTAG, RW_WRITER); 876219089Spjd 877219089Spjd /* 878219089Spjd * If the vdev is being removed we don't activate 879219089Spjd * the metaslabs since we want to ensure that no new 880219089Spjd * allocations are performed on this device. 881219089Spjd */ 882219089Spjd if (oldc == 0 && !vd->vdev_removing) 883219089Spjd metaslab_group_activate(vd->vdev_mg); 884219089Spjd 885219089Spjd if (txg == 0) 886219089Spjd spa_config_exit(spa, SCL_ALLOC, FTAG); 887219089Spjd 888168404Spjd return (0); 889168404Spjd} 890168404Spjd 891168404Spjdvoid 892168404Spjdvdev_metaslab_fini(vdev_t *vd) 893168404Spjd{ 894168404Spjd uint64_t m; 895168404Spjd uint64_t count = vd->vdev_ms_count; 896168404Spjd 897168404Spjd if (vd->vdev_ms != NULL) { 898219089Spjd metaslab_group_passivate(vd->vdev_mg); 899168404Spjd for (m = 0; m < count; m++) 900168404Spjd if (vd->vdev_ms[m] != NULL) 901168404Spjd metaslab_fini(vd->vdev_ms[m]); 902168404Spjd kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); 903168404Spjd vd->vdev_ms = NULL; 904168404Spjd } 905168404Spjd} 906168404Spjd 907185029Spjdtypedef struct vdev_probe_stats { 908185029Spjd boolean_t vps_readable; 909185029Spjd boolean_t vps_writeable; 910185029Spjd int vps_flags; 911185029Spjd} vdev_probe_stats_t; 912185029Spjd 913185029Spjdstatic void 914185029Spjdvdev_probe_done(zio_t *zio) 915185029Spjd{ 916209962Smm spa_t *spa = zio->io_spa; 917209962Smm vdev_t *vd = zio->io_vd; 918185029Spjd vdev_probe_stats_t *vps = zio->io_private; 919185029Spjd 920209962Smm ASSERT(vd->vdev_probe_zio != NULL); 921209962Smm 922185029Spjd if (zio->io_type == ZIO_TYPE_READ) { 923185029Spjd if (zio->io_error == 0) 924185029Spjd vps->vps_readable = 1; 925209962Smm if (zio->io_error == 0 && spa_writeable(spa)) { 926209962Smm zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd, 927185029Spjd zio->io_offset, zio->io_size, zio->io_data, 928185029Spjd ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 929185029Spjd ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); 930185029Spjd } else { 931185029Spjd zio_buf_free(zio->io_data, zio->io_size); 932185029Spjd } 933185029Spjd } else if (zio->io_type == ZIO_TYPE_WRITE) { 934185029Spjd if (zio->io_error == 0) 935185029Spjd vps->vps_writeable = 1; 936185029Spjd zio_buf_free(zio->io_data, zio->io_size); 937185029Spjd } else if (zio->io_type == ZIO_TYPE_NULL) { 938209962Smm zio_t *pio; 939185029Spjd 940185029Spjd vd->vdev_cant_read |= !vps->vps_readable; 941185029Spjd vd->vdev_cant_write |= !vps->vps_writeable; 942185029Spjd 943185029Spjd if (vdev_readable(vd) && 944209962Smm (vdev_writeable(vd) || !spa_writeable(spa))) { 945185029Spjd zio->io_error = 0; 946185029Spjd } else { 947185029Spjd ASSERT(zio->io_error != 0); 948185029Spjd zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE, 949209962Smm spa, vd, NULL, 0, 0); 950185029Spjd zio->io_error = ENXIO; 951185029Spjd } 952209962Smm 953209962Smm mutex_enter(&vd->vdev_probe_lock); 954209962Smm ASSERT(vd->vdev_probe_zio == zio); 955209962Smm vd->vdev_probe_zio = NULL; 956209962Smm mutex_exit(&vd->vdev_probe_lock); 957209962Smm 958209962Smm while ((pio = zio_walk_parents(zio)) != NULL) 959209962Smm if (!vdev_accessible(vd, pio)) 960209962Smm pio->io_error = ENXIO; 961209962Smm 962185029Spjd kmem_free(vps, sizeof (*vps)); 963185029Spjd } 964185029Spjd} 965185029Spjd 966168404Spjd/* 967185029Spjd * Determine whether this device is accessible by reading and writing 968185029Spjd * to several known locations: the pad regions of each vdev label 969185029Spjd * but the first (which we leave alone in case it contains a VTOC). 970185029Spjd */ 971185029Spjdzio_t * 972209962Smmvdev_probe(vdev_t *vd, zio_t *zio) 973185029Spjd{ 974185029Spjd spa_t *spa = vd->vdev_spa; 975209962Smm vdev_probe_stats_t *vps = NULL; 976209962Smm zio_t *pio; 977185029Spjd 978209962Smm ASSERT(vd->vdev_ops->vdev_op_leaf); 979185029Spjd 980209962Smm /* 981209962Smm * Don't probe the probe. 982209962Smm */ 983209962Smm if (zio && (zio->io_flags & ZIO_FLAG_PROBE)) 984209962Smm return (NULL); 985185029Spjd 986209962Smm /* 987209962Smm * To prevent 'probe storms' when a device fails, we create 988209962Smm * just one probe i/o at a time. All zios that want to probe 989209962Smm * this vdev will become parents of the probe io. 990209962Smm */ 991209962Smm mutex_enter(&vd->vdev_probe_lock); 992209962Smm 993209962Smm if ((pio = vd->vdev_probe_zio) == NULL) { 994209962Smm vps = kmem_zalloc(sizeof (*vps), KM_SLEEP); 995209962Smm 996209962Smm vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | 997209962Smm ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | 998213198Smm ZIO_FLAG_TRYHARD; 999209962Smm 1000209962Smm if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { 1001209962Smm /* 1002209962Smm * vdev_cant_read and vdev_cant_write can only 1003209962Smm * transition from TRUE to FALSE when we have the 1004209962Smm * SCL_ZIO lock as writer; otherwise they can only 1005209962Smm * transition from FALSE to TRUE. This ensures that 1006209962Smm * any zio looking at these values can assume that 1007209962Smm * failures persist for the life of the I/O. That's 1008209962Smm * important because when a device has intermittent 1009209962Smm * connectivity problems, we want to ensure that 1010209962Smm * they're ascribed to the device (ENXIO) and not 1011209962Smm * the zio (EIO). 1012209962Smm * 1013209962Smm * Since we hold SCL_ZIO as writer here, clear both 1014209962Smm * values so the probe can reevaluate from first 1015209962Smm * principles. 1016209962Smm */ 1017209962Smm vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; 1018209962Smm vd->vdev_cant_read = B_FALSE; 1019209962Smm vd->vdev_cant_write = B_FALSE; 1020209962Smm } 1021209962Smm 1022209962Smm vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd, 1023209962Smm vdev_probe_done, vps, 1024209962Smm vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE); 1025209962Smm 1026219089Spjd /* 1027219089Spjd * We can't change the vdev state in this context, so we 1028219089Spjd * kick off an async task to do it on our behalf. 1029219089Spjd */ 1030209962Smm if (zio != NULL) { 1031209962Smm vd->vdev_probe_wanted = B_TRUE; 1032209962Smm spa_async_request(spa, SPA_ASYNC_PROBE); 1033209962Smm } 1034185029Spjd } 1035185029Spjd 1036209962Smm if (zio != NULL) 1037209962Smm zio_add_child(zio, pio); 1038185029Spjd 1039209962Smm mutex_exit(&vd->vdev_probe_lock); 1040185029Spjd 1041209962Smm if (vps == NULL) { 1042209962Smm ASSERT(zio != NULL); 1043209962Smm return (NULL); 1044209962Smm } 1045185029Spjd 1046185029Spjd for (int l = 1; l < VDEV_LABELS; l++) { 1047209962Smm zio_nowait(zio_read_phys(pio, vd, 1048185029Spjd vdev_label_offset(vd->vdev_psize, l, 1049209962Smm offsetof(vdev_label_t, vl_pad2)), 1050209962Smm VDEV_PAD_SIZE, zio_buf_alloc(VDEV_PAD_SIZE), 1051185029Spjd ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 1052185029Spjd ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); 1053185029Spjd } 1054185029Spjd 1055209962Smm if (zio == NULL) 1056209962Smm return (pio); 1057209962Smm 1058209962Smm zio_nowait(pio); 1059209962Smm return (NULL); 1060185029Spjd} 1061185029Spjd 1062219089Spjdstatic void 1063219089Spjdvdev_open_child(void *arg) 1064219089Spjd{ 1065219089Spjd vdev_t *vd = arg; 1066219089Spjd 1067219089Spjd vd->vdev_open_thread = curthread; 1068219089Spjd vd->vdev_open_error = vdev_open(vd); 1069219089Spjd vd->vdev_open_thread = NULL; 1070219089Spjd} 1071219089Spjd 1072219089Spjdboolean_t 1073219089Spjdvdev_uses_zvols(vdev_t *vd) 1074219089Spjd{ 1075219089Spjd if (vd->vdev_path && strncmp(vd->vdev_path, ZVOL_DIR, 1076219089Spjd strlen(ZVOL_DIR)) == 0) 1077219089Spjd return (B_TRUE); 1078219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1079219089Spjd if (vdev_uses_zvols(vd->vdev_child[c])) 1080219089Spjd return (B_TRUE); 1081219089Spjd return (B_FALSE); 1082219089Spjd} 1083219089Spjd 1084219089Spjdvoid 1085219089Spjdvdev_open_children(vdev_t *vd) 1086219089Spjd{ 1087219089Spjd taskq_t *tq; 1088219089Spjd int children = vd->vdev_children; 1089219089Spjd 1090219089Spjd /* 1091219089Spjd * in order to handle pools on top of zvols, do the opens 1092219089Spjd * in a single thread so that the same thread holds the 1093219089Spjd * spa_namespace_lock 1094219089Spjd */ 1095219089Spjd if (B_TRUE || vdev_uses_zvols(vd)) { 1096219089Spjd for (int c = 0; c < children; c++) 1097219089Spjd vd->vdev_child[c]->vdev_open_error = 1098219089Spjd vdev_open(vd->vdev_child[c]); 1099219089Spjd return; 1100219089Spjd } 1101219089Spjd tq = taskq_create("vdev_open", children, minclsyspri, 1102219089Spjd children, children, TASKQ_PREPOPULATE); 1103219089Spjd 1104219089Spjd for (int c = 0; c < children; c++) 1105219089Spjd VERIFY(taskq_dispatch(tq, vdev_open_child, vd->vdev_child[c], 1106219089Spjd TQ_SLEEP) != 0); 1107219089Spjd 1108219089Spjd taskq_destroy(tq); 1109219089Spjd} 1110219089Spjd 1111185029Spjd/* 1112168404Spjd * Prepare a virtual device for access. 1113168404Spjd */ 1114168404Spjdint 1115168404Spjdvdev_open(vdev_t *vd) 1116168404Spjd{ 1117209962Smm spa_t *spa = vd->vdev_spa; 1118168404Spjd int error; 1119168404Spjd uint64_t osize = 0; 1120168404Spjd uint64_t asize, psize; 1121168404Spjd uint64_t ashift = 0; 1122168404Spjd 1123219089Spjd ASSERT(vd->vdev_open_thread == curthread || 1124219089Spjd spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1125168404Spjd ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || 1126168404Spjd vd->vdev_state == VDEV_STATE_CANT_OPEN || 1127168404Spjd vd->vdev_state == VDEV_STATE_OFFLINE); 1128168404Spjd 1129168404Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 1130213197Smm vd->vdev_cant_read = B_FALSE; 1131213197Smm vd->vdev_cant_write = B_FALSE; 1132219089Spjd vd->vdev_min_asize = vdev_get_min_asize(vd); 1133168404Spjd 1134219089Spjd /* 1135219089Spjd * If this vdev is not removed, check its fault status. If it's 1136219089Spjd * faulted, bail out of the open. 1137219089Spjd */ 1138185029Spjd if (!vd->vdev_removed && vd->vdev_faulted) { 1139168404Spjd ASSERT(vd->vdev_children == 0); 1140219089Spjd ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || 1141219089Spjd vd->vdev_label_aux == VDEV_AUX_EXTERNAL); 1142185029Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1143219089Spjd vd->vdev_label_aux); 1144185029Spjd return (ENXIO); 1145185029Spjd } else if (vd->vdev_offline) { 1146185029Spjd ASSERT(vd->vdev_children == 0); 1147168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); 1148168404Spjd return (ENXIO); 1149168404Spjd } 1150168404Spjd 1151168404Spjd error = vd->vdev_ops->vdev_op_open(vd, &osize, &ashift); 1152168404Spjd 1153219089Spjd /* 1154219089Spjd * Reset the vdev_reopening flag so that we actually close 1155219089Spjd * the vdev on error. 1156219089Spjd */ 1157219089Spjd vd->vdev_reopening = B_FALSE; 1158168404Spjd if (zio_injection_enabled && error == 0) 1159213198Smm error = zio_handle_device_injection(vd, NULL, ENXIO); 1160168404Spjd 1161185029Spjd if (error) { 1162185029Spjd if (vd->vdev_removed && 1163185029Spjd vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) 1164185029Spjd vd->vdev_removed = B_FALSE; 1165168404Spjd 1166168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1167168404Spjd vd->vdev_stat.vs_aux); 1168168404Spjd return (error); 1169168404Spjd } 1170168404Spjd 1171185029Spjd vd->vdev_removed = B_FALSE; 1172168404Spjd 1173219089Spjd /* 1174219089Spjd * Recheck the faulted flag now that we have confirmed that 1175219089Spjd * the vdev is accessible. If we're faulted, bail. 1176219089Spjd */ 1177219089Spjd if (vd->vdev_faulted) { 1178219089Spjd ASSERT(vd->vdev_children == 0); 1179219089Spjd ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || 1180219089Spjd vd->vdev_label_aux == VDEV_AUX_EXTERNAL); 1181219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1182219089Spjd vd->vdev_label_aux); 1183219089Spjd return (ENXIO); 1184219089Spjd } 1185219089Spjd 1186185029Spjd if (vd->vdev_degraded) { 1187185029Spjd ASSERT(vd->vdev_children == 0); 1188185029Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 1189185029Spjd VDEV_AUX_ERR_EXCEEDED); 1190185029Spjd } else { 1191219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_HEALTHY, 0); 1192185029Spjd } 1193185029Spjd 1194219089Spjd /* 1195219089Spjd * For hole or missing vdevs we just return success. 1196219089Spjd */ 1197219089Spjd if (vd->vdev_ishole || vd->vdev_ops == &vdev_missing_ops) 1198219089Spjd return (0); 1199219089Spjd 1200219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 1201168404Spjd if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { 1202168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 1203168404Spjd VDEV_AUX_NONE); 1204168404Spjd break; 1205168404Spjd } 1206219089Spjd } 1207168404Spjd 1208168404Spjd osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); 1209168404Spjd 1210168404Spjd if (vd->vdev_children == 0) { 1211168404Spjd if (osize < SPA_MINDEVSIZE) { 1212168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1213168404Spjd VDEV_AUX_TOO_SMALL); 1214168404Spjd return (EOVERFLOW); 1215168404Spjd } 1216168404Spjd psize = osize; 1217168404Spjd asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); 1218168404Spjd } else { 1219168404Spjd if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - 1220168404Spjd (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { 1221168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1222168404Spjd VDEV_AUX_TOO_SMALL); 1223168404Spjd return (EOVERFLOW); 1224168404Spjd } 1225168404Spjd psize = 0; 1226168404Spjd asize = osize; 1227168404Spjd } 1228168404Spjd 1229168404Spjd vd->vdev_psize = psize; 1230168404Spjd 1231219089Spjd /* 1232219089Spjd * Make sure the allocatable size hasn't shrunk. 1233219089Spjd */ 1234219089Spjd if (asize < vd->vdev_min_asize) { 1235219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1236219089Spjd VDEV_AUX_BAD_LABEL); 1237219089Spjd return (EINVAL); 1238219089Spjd } 1239219089Spjd 1240168404Spjd if (vd->vdev_asize == 0) { 1241168404Spjd /* 1242168404Spjd * This is the first-ever open, so use the computed values. 1243168404Spjd * For testing purposes, a higher ashift can be requested. 1244168404Spjd */ 1245168404Spjd vd->vdev_asize = asize; 1246168404Spjd vd->vdev_ashift = MAX(ashift, vd->vdev_ashift); 1247168404Spjd } else { 1248168404Spjd /* 1249168404Spjd * Make sure the alignment requirement hasn't increased. 1250168404Spjd */ 1251168404Spjd if (ashift > vd->vdev_top->vdev_ashift) { 1252168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1253168404Spjd VDEV_AUX_BAD_LABEL); 1254168404Spjd return (EINVAL); 1255168404Spjd } 1256219089Spjd } 1257168404Spjd 1258219089Spjd /* 1259219089Spjd * If all children are healthy and the asize has increased, 1260219089Spjd * then we've experienced dynamic LUN growth. If automatic 1261219089Spjd * expansion is enabled then use the additional space. 1262219089Spjd */ 1263219089Spjd if (vd->vdev_state == VDEV_STATE_HEALTHY && asize > vd->vdev_asize && 1264219089Spjd (vd->vdev_expanding || spa->spa_autoexpand)) 1265219089Spjd vd->vdev_asize = asize; 1266168404Spjd 1267219089Spjd vdev_set_min_asize(vd); 1268168404Spjd 1269168404Spjd /* 1270185029Spjd * Ensure we can issue some IO before declaring the 1271185029Spjd * vdev open for business. 1272185029Spjd */ 1273185029Spjd if (vd->vdev_ops->vdev_op_leaf && 1274185029Spjd (error = zio_wait(vdev_probe(vd, NULL))) != 0) { 1275219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1276219089Spjd VDEV_AUX_ERR_EXCEEDED); 1277185029Spjd return (error); 1278185029Spjd } 1279185029Spjd 1280185029Spjd /* 1281185029Spjd * If a leaf vdev has a DTL, and seems healthy, then kick off a 1282209962Smm * resilver. But don't do this if we are doing a reopen for a scrub, 1283209962Smm * since this would just restart the scrub we are already doing. 1284168404Spjd */ 1285209962Smm if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen && 1286209962Smm vdev_resilver_needed(vd, NULL, NULL)) 1287209962Smm spa_async_request(spa, SPA_ASYNC_RESILVER); 1288168404Spjd 1289168404Spjd return (0); 1290168404Spjd} 1291168404Spjd 1292168404Spjd/* 1293168404Spjd * Called once the vdevs are all opened, this routine validates the label 1294168404Spjd * contents. This needs to be done before vdev_load() so that we don't 1295185029Spjd * inadvertently do repair I/Os to the wrong device. 1296168404Spjd * 1297168404Spjd * This function will only return failure if one of the vdevs indicates that it 1298168404Spjd * has since been destroyed or exported. This is only possible if 1299168404Spjd * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state 1300168404Spjd * will be updated but the function will return 0. 1301168404Spjd */ 1302168404Spjdint 1303168404Spjdvdev_validate(vdev_t *vd) 1304168404Spjd{ 1305168404Spjd spa_t *spa = vd->vdev_spa; 1306168404Spjd nvlist_t *label; 1307219089Spjd uint64_t guid = 0, top_guid; 1308168404Spjd uint64_t state; 1309168404Spjd 1310219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1311168404Spjd if (vdev_validate(vd->vdev_child[c]) != 0) 1312168926Spjd return (EBADF); 1313168404Spjd 1314168404Spjd /* 1315168404Spjd * If the device has already failed, or was marked offline, don't do 1316168404Spjd * any further validation. Otherwise, label I/O will fail and we will 1317168404Spjd * overwrite the previous state. 1318168404Spjd */ 1319185029Spjd if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { 1320219089Spjd uint64_t aux_guid = 0; 1321219089Spjd nvlist_t *nvl; 1322168404Spjd 1323168404Spjd if ((label = vdev_label_read_config(vd)) == NULL) { 1324168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1325168404Spjd VDEV_AUX_BAD_LABEL); 1326168404Spjd return (0); 1327168404Spjd } 1328168404Spjd 1329219089Spjd /* 1330219089Spjd * Determine if this vdev has been split off into another 1331219089Spjd * pool. If so, then refuse to open it. 1332219089Spjd */ 1333219089Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_SPLIT_GUID, 1334219089Spjd &aux_guid) == 0 && aux_guid == spa_guid(spa)) { 1335219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1336219089Spjd VDEV_AUX_SPLIT_POOL); 1337219089Spjd nvlist_free(label); 1338219089Spjd return (0); 1339219089Spjd } 1340219089Spjd 1341168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, 1342168404Spjd &guid) != 0 || guid != spa_guid(spa)) { 1343168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1344168404Spjd VDEV_AUX_CORRUPT_DATA); 1345168404Spjd nvlist_free(label); 1346168404Spjd return (0); 1347168404Spjd } 1348168404Spjd 1349219089Spjd if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvl) 1350219089Spjd != 0 || nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_ORIG_GUID, 1351219089Spjd &aux_guid) != 0) 1352219089Spjd aux_guid = 0; 1353219089Spjd 1354185029Spjd /* 1355185029Spjd * If this vdev just became a top-level vdev because its 1356185029Spjd * sibling was detached, it will have adopted the parent's 1357185029Spjd * vdev guid -- but the label may or may not be on disk yet. 1358185029Spjd * Fortunately, either version of the label will have the 1359185029Spjd * same top guid, so if we're a top-level vdev, we can 1360185029Spjd * safely compare to that instead. 1361219089Spjd * 1362219089Spjd * If we split this vdev off instead, then we also check the 1363219089Spjd * original pool's guid. We don't want to consider the vdev 1364219089Spjd * corrupt if it is partway through a split operation. 1365185029Spjd */ 1366168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, 1367185029Spjd &guid) != 0 || 1368185029Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, 1369185029Spjd &top_guid) != 0 || 1370219089Spjd ((vd->vdev_guid != guid && vd->vdev_guid != aux_guid) && 1371185029Spjd (vd->vdev_guid != top_guid || vd != vd->vdev_top))) { 1372168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1373168404Spjd VDEV_AUX_CORRUPT_DATA); 1374168404Spjd nvlist_free(label); 1375168404Spjd return (0); 1376168404Spjd } 1377168404Spjd 1378168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, 1379168404Spjd &state) != 0) { 1380168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1381168404Spjd VDEV_AUX_CORRUPT_DATA); 1382168404Spjd nvlist_free(label); 1383168404Spjd return (0); 1384168404Spjd } 1385168404Spjd 1386168404Spjd nvlist_free(label); 1387168404Spjd 1388209962Smm /* 1389219089Spjd * If this is a verbatim import, no need to check the 1390209962Smm * state of the pool. 1391209962Smm */ 1392219089Spjd if (!(spa->spa_import_flags & ZFS_IMPORT_VERBATIM) && 1393219089Spjd spa_load_state(spa) == SPA_LOAD_OPEN && 1394168404Spjd state != POOL_STATE_ACTIVE) 1395168926Spjd return (EBADF); 1396185029Spjd 1397185029Spjd /* 1398185029Spjd * If we were able to open and validate a vdev that was 1399185029Spjd * previously marked permanently unavailable, clear that state 1400185029Spjd * now. 1401185029Spjd */ 1402185029Spjd if (vd->vdev_not_present) 1403185029Spjd vd->vdev_not_present = 0; 1404168404Spjd } 1405168404Spjd 1406168404Spjd return (0); 1407168404Spjd} 1408168404Spjd 1409168404Spjd/* 1410168404Spjd * Close a virtual device. 1411168404Spjd */ 1412168404Spjdvoid 1413168404Spjdvdev_close(vdev_t *vd) 1414168404Spjd{ 1415209962Smm spa_t *spa = vd->vdev_spa; 1416219089Spjd vdev_t *pvd = vd->vdev_parent; 1417209962Smm 1418209962Smm ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1419209962Smm 1420219089Spjd /* 1421219089Spjd * If our parent is reopening, then we are as well, unless we are 1422219089Spjd * going offline. 1423219089Spjd */ 1424219089Spjd if (pvd != NULL && pvd->vdev_reopening) 1425219089Spjd vd->vdev_reopening = (pvd->vdev_reopening && !vd->vdev_offline); 1426219089Spjd 1427168404Spjd vd->vdev_ops->vdev_op_close(vd); 1428168404Spjd 1429185029Spjd vdev_cache_purge(vd); 1430168404Spjd 1431168404Spjd /* 1432219089Spjd * We record the previous state before we close it, so that if we are 1433168404Spjd * doing a reopen(), we don't generate FMA ereports if we notice that 1434168404Spjd * it's still faulted. 1435168404Spjd */ 1436168404Spjd vd->vdev_prevstate = vd->vdev_state; 1437168404Spjd 1438168404Spjd if (vd->vdev_offline) 1439168404Spjd vd->vdev_state = VDEV_STATE_OFFLINE; 1440168404Spjd else 1441168404Spjd vd->vdev_state = VDEV_STATE_CLOSED; 1442168404Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 1443168404Spjd} 1444168404Spjd 1445168404Spjdvoid 1446219089Spjdvdev_hold(vdev_t *vd) 1447219089Spjd{ 1448219089Spjd spa_t *spa = vd->vdev_spa; 1449219089Spjd 1450219089Spjd ASSERT(spa_is_root(spa)); 1451219089Spjd if (spa->spa_state == POOL_STATE_UNINITIALIZED) 1452219089Spjd return; 1453219089Spjd 1454219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1455219089Spjd vdev_hold(vd->vdev_child[c]); 1456219089Spjd 1457219089Spjd if (vd->vdev_ops->vdev_op_leaf) 1458219089Spjd vd->vdev_ops->vdev_op_hold(vd); 1459219089Spjd} 1460219089Spjd 1461219089Spjdvoid 1462219089Spjdvdev_rele(vdev_t *vd) 1463219089Spjd{ 1464219089Spjd spa_t *spa = vd->vdev_spa; 1465219089Spjd 1466219089Spjd ASSERT(spa_is_root(spa)); 1467219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1468219089Spjd vdev_rele(vd->vdev_child[c]); 1469219089Spjd 1470219089Spjd if (vd->vdev_ops->vdev_op_leaf) 1471219089Spjd vd->vdev_ops->vdev_op_rele(vd); 1472219089Spjd} 1473219089Spjd 1474219089Spjd/* 1475219089Spjd * Reopen all interior vdevs and any unopened leaves. We don't actually 1476219089Spjd * reopen leaf vdevs which had previously been opened as they might deadlock 1477219089Spjd * on the spa_config_lock. Instead we only obtain the leaf's physical size. 1478219089Spjd * If the leaf has never been opened then open it, as usual. 1479219089Spjd */ 1480219089Spjdvoid 1481168404Spjdvdev_reopen(vdev_t *vd) 1482168404Spjd{ 1483168404Spjd spa_t *spa = vd->vdev_spa; 1484168404Spjd 1485185029Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1486168404Spjd 1487219089Spjd /* set the reopening flag unless we're taking the vdev offline */ 1488219089Spjd vd->vdev_reopening = !vd->vdev_offline; 1489168404Spjd vdev_close(vd); 1490168404Spjd (void) vdev_open(vd); 1491168404Spjd 1492168404Spjd /* 1493168404Spjd * Call vdev_validate() here to make sure we have the same device. 1494168404Spjd * Otherwise, a device with an invalid label could be successfully 1495168404Spjd * opened in response to vdev_reopen(). 1496168404Spjd */ 1497185029Spjd if (vd->vdev_aux) { 1498185029Spjd (void) vdev_validate_aux(vd); 1499185029Spjd if (vdev_readable(vd) && vdev_writeable(vd) && 1500209962Smm vd->vdev_aux == &spa->spa_l2cache && 1501219089Spjd !l2arc_vdev_present(vd)) 1502219089Spjd l2arc_add_vdev(spa, vd); 1503185029Spjd } else { 1504185029Spjd (void) vdev_validate(vd); 1505185029Spjd } 1506168404Spjd 1507168404Spjd /* 1508185029Spjd * Reassess parent vdev's health. 1509168404Spjd */ 1510185029Spjd vdev_propagate_state(vd); 1511168404Spjd} 1512168404Spjd 1513168404Spjdint 1514168404Spjdvdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) 1515168404Spjd{ 1516168404Spjd int error; 1517168404Spjd 1518168404Spjd /* 1519168404Spjd * Normally, partial opens (e.g. of a mirror) are allowed. 1520168404Spjd * For a create, however, we want to fail the request if 1521168404Spjd * there are any components we can't open. 1522168404Spjd */ 1523168404Spjd error = vdev_open(vd); 1524168404Spjd 1525168404Spjd if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { 1526168404Spjd vdev_close(vd); 1527168404Spjd return (error ? error : ENXIO); 1528168404Spjd } 1529168404Spjd 1530168404Spjd /* 1531168404Spjd * Recursively initialize all labels. 1532168404Spjd */ 1533168404Spjd if ((error = vdev_label_init(vd, txg, isreplacing ? 1534168404Spjd VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { 1535168404Spjd vdev_close(vd); 1536168404Spjd return (error); 1537168404Spjd } 1538168404Spjd 1539168404Spjd return (0); 1540168404Spjd} 1541168404Spjd 1542168404Spjdvoid 1543219089Spjdvdev_metaslab_set_size(vdev_t *vd) 1544168404Spjd{ 1545168404Spjd /* 1546168404Spjd * Aim for roughly 200 metaslabs per vdev. 1547168404Spjd */ 1548168404Spjd vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); 1549168404Spjd vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); 1550168404Spjd} 1551168404Spjd 1552168404Spjdvoid 1553168404Spjdvdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) 1554168404Spjd{ 1555168404Spjd ASSERT(vd == vd->vdev_top); 1556219089Spjd ASSERT(!vd->vdev_ishole); 1557168404Spjd ASSERT(ISP2(flags)); 1558219089Spjd ASSERT(spa_writeable(vd->vdev_spa)); 1559168404Spjd 1560168404Spjd if (flags & VDD_METASLAB) 1561168404Spjd (void) txg_list_add(&vd->vdev_ms_list, arg, txg); 1562168404Spjd 1563168404Spjd if (flags & VDD_DTL) 1564168404Spjd (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); 1565168404Spjd 1566168404Spjd (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); 1567168404Spjd} 1568168404Spjd 1569209962Smm/* 1570209962Smm * DTLs. 1571209962Smm * 1572209962Smm * A vdev's DTL (dirty time log) is the set of transaction groups for which 1573219089Spjd * the vdev has less than perfect replication. There are four kinds of DTL: 1574209962Smm * 1575209962Smm * DTL_MISSING: txgs for which the vdev has no valid copies of the data 1576209962Smm * 1577209962Smm * DTL_PARTIAL: txgs for which data is available, but not fully replicated 1578209962Smm * 1579209962Smm * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon 1580209962Smm * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of 1581209962Smm * txgs that was scrubbed. 1582209962Smm * 1583209962Smm * DTL_OUTAGE: txgs which cannot currently be read, whether due to 1584209962Smm * persistent errors or just some device being offline. 1585209962Smm * Unlike the other three, the DTL_OUTAGE map is not generally 1586209962Smm * maintained; it's only computed when needed, typically to 1587209962Smm * determine whether a device can be detached. 1588209962Smm * 1589209962Smm * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device 1590209962Smm * either has the data or it doesn't. 1591209962Smm * 1592209962Smm * For interior vdevs such as mirror and RAID-Z the picture is more complex. 1593209962Smm * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because 1594209962Smm * if any child is less than fully replicated, then so is its parent. 1595209962Smm * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs, 1596209962Smm * comprising only those txgs which appear in 'maxfaults' or more children; 1597209962Smm * those are the txgs we don't have enough replication to read. For example, 1598209962Smm * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2); 1599209962Smm * thus, its DTL_MISSING consists of the set of txgs that appear in more than 1600209962Smm * two child DTL_MISSING maps. 1601209962Smm * 1602209962Smm * It should be clear from the above that to compute the DTLs and outage maps 1603209962Smm * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps. 1604209962Smm * Therefore, that is all we keep on disk. When loading the pool, or after 1605209962Smm * a configuration change, we generate all other DTLs from first principles. 1606209962Smm */ 1607168404Spjdvoid 1608209962Smmvdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1609168404Spjd{ 1610209962Smm space_map_t *sm = &vd->vdev_dtl[t]; 1611209962Smm 1612209962Smm ASSERT(t < DTL_TYPES); 1613209962Smm ASSERT(vd != vd->vdev_spa->spa_root_vdev); 1614219089Spjd ASSERT(spa_writeable(vd->vdev_spa)); 1615209962Smm 1616168404Spjd mutex_enter(sm->sm_lock); 1617168404Spjd if (!space_map_contains(sm, txg, size)) 1618168404Spjd space_map_add(sm, txg, size); 1619168404Spjd mutex_exit(sm->sm_lock); 1620168404Spjd} 1621168404Spjd 1622209962Smmboolean_t 1623209962Smmvdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1624168404Spjd{ 1625209962Smm space_map_t *sm = &vd->vdev_dtl[t]; 1626209962Smm boolean_t dirty = B_FALSE; 1627168404Spjd 1628209962Smm ASSERT(t < DTL_TYPES); 1629209962Smm ASSERT(vd != vd->vdev_spa->spa_root_vdev); 1630168404Spjd 1631168404Spjd mutex_enter(sm->sm_lock); 1632209962Smm if (sm->sm_space != 0) 1633209962Smm dirty = space_map_contains(sm, txg, size); 1634168404Spjd mutex_exit(sm->sm_lock); 1635168404Spjd 1636168404Spjd return (dirty); 1637168404Spjd} 1638168404Spjd 1639209962Smmboolean_t 1640209962Smmvdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t) 1641209962Smm{ 1642209962Smm space_map_t *sm = &vd->vdev_dtl[t]; 1643209962Smm boolean_t empty; 1644209962Smm 1645209962Smm mutex_enter(sm->sm_lock); 1646209962Smm empty = (sm->sm_space == 0); 1647209962Smm mutex_exit(sm->sm_lock); 1648209962Smm 1649209962Smm return (empty); 1650209962Smm} 1651209962Smm 1652168404Spjd/* 1653168404Spjd * Reassess DTLs after a config change or scrub completion. 1654168404Spjd */ 1655168404Spjdvoid 1656168404Spjdvdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) 1657168404Spjd{ 1658168404Spjd spa_t *spa = vd->vdev_spa; 1659209962Smm avl_tree_t reftree; 1660209962Smm int minref; 1661168404Spjd 1662209962Smm ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 1663168404Spjd 1664209962Smm for (int c = 0; c < vd->vdev_children; c++) 1665209962Smm vdev_dtl_reassess(vd->vdev_child[c], txg, 1666209962Smm scrub_txg, scrub_done); 1667209962Smm 1668219089Spjd if (vd == spa->spa_root_vdev || vd->vdev_ishole || vd->vdev_aux) 1669209962Smm return; 1670209962Smm 1671209962Smm if (vd->vdev_ops->vdev_op_leaf) { 1672219089Spjd dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; 1673219089Spjd 1674168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1675185029Spjd if (scrub_txg != 0 && 1676219089Spjd (spa->spa_scrub_started || 1677219089Spjd (scn && scn->scn_phys.scn_errors == 0))) { 1678185029Spjd /* 1679185029Spjd * We completed a scrub up to scrub_txg. If we 1680185029Spjd * did it without rebooting, then the scrub dtl 1681185029Spjd * will be valid, so excise the old region and 1682185029Spjd * fold in the scrub dtl. Otherwise, leave the 1683185029Spjd * dtl as-is if there was an error. 1684209962Smm * 1685209962Smm * There's little trick here: to excise the beginning 1686209962Smm * of the DTL_MISSING map, we put it into a reference 1687209962Smm * tree and then add a segment with refcnt -1 that 1688209962Smm * covers the range [0, scrub_txg). This means 1689209962Smm * that each txg in that range has refcnt -1 or 0. 1690209962Smm * We then add DTL_SCRUB with a refcnt of 2, so that 1691209962Smm * entries in the range [0, scrub_txg) will have a 1692209962Smm * positive refcnt -- either 1 or 2. We then convert 1693209962Smm * the reference tree into the new DTL_MISSING map. 1694185029Spjd */ 1695209962Smm space_map_ref_create(&reftree); 1696209962Smm space_map_ref_add_map(&reftree, 1697209962Smm &vd->vdev_dtl[DTL_MISSING], 1); 1698209962Smm space_map_ref_add_seg(&reftree, 0, scrub_txg, -1); 1699209962Smm space_map_ref_add_map(&reftree, 1700209962Smm &vd->vdev_dtl[DTL_SCRUB], 2); 1701209962Smm space_map_ref_generate_map(&reftree, 1702209962Smm &vd->vdev_dtl[DTL_MISSING], 1); 1703209962Smm space_map_ref_destroy(&reftree); 1704168404Spjd } 1705209962Smm space_map_vacate(&vd->vdev_dtl[DTL_PARTIAL], NULL, NULL); 1706209962Smm space_map_walk(&vd->vdev_dtl[DTL_MISSING], 1707209962Smm space_map_add, &vd->vdev_dtl[DTL_PARTIAL]); 1708168404Spjd if (scrub_done) 1709209962Smm space_map_vacate(&vd->vdev_dtl[DTL_SCRUB], NULL, NULL); 1710209962Smm space_map_vacate(&vd->vdev_dtl[DTL_OUTAGE], NULL, NULL); 1711209962Smm if (!vdev_readable(vd)) 1712209962Smm space_map_add(&vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL); 1713209962Smm else 1714209962Smm space_map_walk(&vd->vdev_dtl[DTL_MISSING], 1715209962Smm space_map_add, &vd->vdev_dtl[DTL_OUTAGE]); 1716168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1717185029Spjd 1718168404Spjd if (txg != 0) 1719168404Spjd vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); 1720168404Spjd return; 1721168404Spjd } 1722168404Spjd 1723168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1724209962Smm for (int t = 0; t < DTL_TYPES; t++) { 1725209962Smm /* account for child's outage in parent's missing map */ 1726209962Smm int s = (t == DTL_MISSING) ? DTL_OUTAGE: t; 1727209962Smm if (t == DTL_SCRUB) 1728209962Smm continue; /* leaf vdevs only */ 1729209962Smm if (t == DTL_PARTIAL) 1730209962Smm minref = 1; /* i.e. non-zero */ 1731209962Smm else if (vd->vdev_nparity != 0) 1732209962Smm minref = vd->vdev_nparity + 1; /* RAID-Z */ 1733209962Smm else 1734209962Smm minref = vd->vdev_children; /* any kind of mirror */ 1735209962Smm space_map_ref_create(&reftree); 1736209962Smm for (int c = 0; c < vd->vdev_children; c++) { 1737209962Smm vdev_t *cvd = vd->vdev_child[c]; 1738209962Smm mutex_enter(&cvd->vdev_dtl_lock); 1739209962Smm space_map_ref_add_map(&reftree, &cvd->vdev_dtl[s], 1); 1740209962Smm mutex_exit(&cvd->vdev_dtl_lock); 1741209962Smm } 1742209962Smm space_map_ref_generate_map(&reftree, &vd->vdev_dtl[t], minref); 1743209962Smm space_map_ref_destroy(&reftree); 1744209962Smm } 1745168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1746168404Spjd} 1747168404Spjd 1748168404Spjdstatic int 1749168404Spjdvdev_dtl_load(vdev_t *vd) 1750168404Spjd{ 1751168404Spjd spa_t *spa = vd->vdev_spa; 1752209962Smm space_map_obj_t *smo = &vd->vdev_dtl_smo; 1753168404Spjd objset_t *mos = spa->spa_meta_objset; 1754168404Spjd dmu_buf_t *db; 1755168404Spjd int error; 1756168404Spjd 1757168404Spjd ASSERT(vd->vdev_children == 0); 1758168404Spjd 1759168404Spjd if (smo->smo_object == 0) 1760168404Spjd return (0); 1761168404Spjd 1762219089Spjd ASSERT(!vd->vdev_ishole); 1763219089Spjd 1764168404Spjd if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) 1765168404Spjd return (error); 1766168404Spjd 1767185029Spjd ASSERT3U(db->db_size, >=, sizeof (*smo)); 1768185029Spjd bcopy(db->db_data, smo, sizeof (*smo)); 1769168404Spjd dmu_buf_rele(db, FTAG); 1770168404Spjd 1771168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1772209962Smm error = space_map_load(&vd->vdev_dtl[DTL_MISSING], 1773209962Smm NULL, SM_ALLOC, smo, mos); 1774168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1775168404Spjd 1776168404Spjd return (error); 1777168404Spjd} 1778168404Spjd 1779168404Spjdvoid 1780168404Spjdvdev_dtl_sync(vdev_t *vd, uint64_t txg) 1781168404Spjd{ 1782168404Spjd spa_t *spa = vd->vdev_spa; 1783209962Smm space_map_obj_t *smo = &vd->vdev_dtl_smo; 1784209962Smm space_map_t *sm = &vd->vdev_dtl[DTL_MISSING]; 1785168404Spjd objset_t *mos = spa->spa_meta_objset; 1786168404Spjd space_map_t smsync; 1787168404Spjd kmutex_t smlock; 1788168404Spjd dmu_buf_t *db; 1789168404Spjd dmu_tx_t *tx; 1790168404Spjd 1791219089Spjd ASSERT(!vd->vdev_ishole); 1792219089Spjd 1793168404Spjd tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 1794168404Spjd 1795168404Spjd if (vd->vdev_detached) { 1796168404Spjd if (smo->smo_object != 0) { 1797168404Spjd int err = dmu_object_free(mos, smo->smo_object, tx); 1798168404Spjd ASSERT3U(err, ==, 0); 1799168404Spjd smo->smo_object = 0; 1800168404Spjd } 1801168404Spjd dmu_tx_commit(tx); 1802168404Spjd return; 1803168404Spjd } 1804168404Spjd 1805168404Spjd if (smo->smo_object == 0) { 1806168404Spjd ASSERT(smo->smo_objsize == 0); 1807168404Spjd ASSERT(smo->smo_alloc == 0); 1808168404Spjd smo->smo_object = dmu_object_alloc(mos, 1809168404Spjd DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, 1810168404Spjd DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); 1811168404Spjd ASSERT(smo->smo_object != 0); 1812168404Spjd vdev_config_dirty(vd->vdev_top); 1813168404Spjd } 1814168404Spjd 1815168404Spjd mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); 1816168404Spjd 1817168404Spjd space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, 1818168404Spjd &smlock); 1819168404Spjd 1820168404Spjd mutex_enter(&smlock); 1821168404Spjd 1822168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1823168404Spjd space_map_walk(sm, space_map_add, &smsync); 1824168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1825168404Spjd 1826168404Spjd space_map_truncate(smo, mos, tx); 1827168404Spjd space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); 1828168404Spjd 1829168404Spjd space_map_destroy(&smsync); 1830168404Spjd 1831168404Spjd mutex_exit(&smlock); 1832168404Spjd mutex_destroy(&smlock); 1833168404Spjd 1834168404Spjd VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); 1835168404Spjd dmu_buf_will_dirty(db, tx); 1836185029Spjd ASSERT3U(db->db_size, >=, sizeof (*smo)); 1837185029Spjd bcopy(smo, db->db_data, sizeof (*smo)); 1838168404Spjd dmu_buf_rele(db, FTAG); 1839168404Spjd 1840168404Spjd dmu_tx_commit(tx); 1841168404Spjd} 1842168404Spjd 1843185029Spjd/* 1844209962Smm * Determine whether the specified vdev can be offlined/detached/removed 1845209962Smm * without losing data. 1846209962Smm */ 1847209962Smmboolean_t 1848209962Smmvdev_dtl_required(vdev_t *vd) 1849209962Smm{ 1850209962Smm spa_t *spa = vd->vdev_spa; 1851209962Smm vdev_t *tvd = vd->vdev_top; 1852209962Smm uint8_t cant_read = vd->vdev_cant_read; 1853209962Smm boolean_t required; 1854209962Smm 1855209962Smm ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1856209962Smm 1857209962Smm if (vd == spa->spa_root_vdev || vd == tvd) 1858209962Smm return (B_TRUE); 1859209962Smm 1860209962Smm /* 1861209962Smm * Temporarily mark the device as unreadable, and then determine 1862209962Smm * whether this results in any DTL outages in the top-level vdev. 1863209962Smm * If not, we can safely offline/detach/remove the device. 1864209962Smm */ 1865209962Smm vd->vdev_cant_read = B_TRUE; 1866209962Smm vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 1867209962Smm required = !vdev_dtl_empty(tvd, DTL_OUTAGE); 1868209962Smm vd->vdev_cant_read = cant_read; 1869209962Smm vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 1870209962Smm 1871219089Spjd if (!required && zio_injection_enabled) 1872219089Spjd required = !!zio_handle_device_injection(vd, NULL, ECHILD); 1873219089Spjd 1874209962Smm return (required); 1875209962Smm} 1876209962Smm 1877209962Smm/* 1878185029Spjd * Determine if resilver is needed, and if so the txg range. 1879185029Spjd */ 1880185029Spjdboolean_t 1881185029Spjdvdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) 1882185029Spjd{ 1883185029Spjd boolean_t needed = B_FALSE; 1884185029Spjd uint64_t thismin = UINT64_MAX; 1885185029Spjd uint64_t thismax = 0; 1886185029Spjd 1887185029Spjd if (vd->vdev_children == 0) { 1888185029Spjd mutex_enter(&vd->vdev_dtl_lock); 1889209962Smm if (vd->vdev_dtl[DTL_MISSING].sm_space != 0 && 1890209962Smm vdev_writeable(vd)) { 1891185029Spjd space_seg_t *ss; 1892185029Spjd 1893209962Smm ss = avl_first(&vd->vdev_dtl[DTL_MISSING].sm_root); 1894185029Spjd thismin = ss->ss_start - 1; 1895209962Smm ss = avl_last(&vd->vdev_dtl[DTL_MISSING].sm_root); 1896185029Spjd thismax = ss->ss_end; 1897185029Spjd needed = B_TRUE; 1898185029Spjd } 1899185029Spjd mutex_exit(&vd->vdev_dtl_lock); 1900185029Spjd } else { 1901209962Smm for (int c = 0; c < vd->vdev_children; c++) { 1902185029Spjd vdev_t *cvd = vd->vdev_child[c]; 1903185029Spjd uint64_t cmin, cmax; 1904185029Spjd 1905185029Spjd if (vdev_resilver_needed(cvd, &cmin, &cmax)) { 1906185029Spjd thismin = MIN(thismin, cmin); 1907185029Spjd thismax = MAX(thismax, cmax); 1908185029Spjd needed = B_TRUE; 1909185029Spjd } 1910185029Spjd } 1911185029Spjd } 1912185029Spjd 1913185029Spjd if (needed && minp) { 1914185029Spjd *minp = thismin; 1915185029Spjd *maxp = thismax; 1916185029Spjd } 1917185029Spjd return (needed); 1918185029Spjd} 1919185029Spjd 1920168404Spjdvoid 1921168404Spjdvdev_load(vdev_t *vd) 1922168404Spjd{ 1923168404Spjd /* 1924168404Spjd * Recursively load all children. 1925168404Spjd */ 1926209962Smm for (int c = 0; c < vd->vdev_children; c++) 1927168404Spjd vdev_load(vd->vdev_child[c]); 1928168404Spjd 1929168404Spjd /* 1930168404Spjd * If this is a top-level vdev, initialize its metaslabs. 1931168404Spjd */ 1932219089Spjd if (vd == vd->vdev_top && !vd->vdev_ishole && 1933168404Spjd (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || 1934168404Spjd vdev_metaslab_init(vd, 0) != 0)) 1935168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1936168404Spjd VDEV_AUX_CORRUPT_DATA); 1937168404Spjd 1938168404Spjd /* 1939168404Spjd * If this is a leaf vdev, load its DTL. 1940168404Spjd */ 1941168404Spjd if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) 1942168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1943168404Spjd VDEV_AUX_CORRUPT_DATA); 1944168404Spjd} 1945168404Spjd 1946168404Spjd/* 1947185029Spjd * The special vdev case is used for hot spares and l2cache devices. Its 1948185029Spjd * sole purpose it to set the vdev state for the associated vdev. To do this, 1949185029Spjd * we make sure that we can open the underlying device, then try to read the 1950185029Spjd * label, and make sure that the label is sane and that it hasn't been 1951185029Spjd * repurposed to another pool. 1952168404Spjd */ 1953168404Spjdint 1954185029Spjdvdev_validate_aux(vdev_t *vd) 1955168404Spjd{ 1956168404Spjd nvlist_t *label; 1957168404Spjd uint64_t guid, version; 1958168404Spjd uint64_t state; 1959168404Spjd 1960185029Spjd if (!vdev_readable(vd)) 1961185029Spjd return (0); 1962185029Spjd 1963168404Spjd if ((label = vdev_label_read_config(vd)) == NULL) { 1964168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1965168404Spjd VDEV_AUX_CORRUPT_DATA); 1966168404Spjd return (-1); 1967168404Spjd } 1968168404Spjd 1969168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || 1970185029Spjd version > SPA_VERSION || 1971168404Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || 1972168404Spjd guid != vd->vdev_guid || 1973168404Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { 1974168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1975168404Spjd VDEV_AUX_CORRUPT_DATA); 1976168404Spjd nvlist_free(label); 1977168404Spjd return (-1); 1978168404Spjd } 1979168404Spjd 1980168404Spjd /* 1981168404Spjd * We don't actually check the pool state here. If it's in fact in 1982168404Spjd * use by another pool, we update this fact on the fly when requested. 1983168404Spjd */ 1984168404Spjd nvlist_free(label); 1985168404Spjd return (0); 1986168404Spjd} 1987168404Spjd 1988168404Spjdvoid 1989219089Spjdvdev_remove(vdev_t *vd, uint64_t txg) 1990219089Spjd{ 1991219089Spjd spa_t *spa = vd->vdev_spa; 1992219089Spjd objset_t *mos = spa->spa_meta_objset; 1993219089Spjd dmu_tx_t *tx; 1994219089Spjd 1995219089Spjd tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg); 1996219089Spjd 1997219089Spjd if (vd->vdev_dtl_smo.smo_object) { 1998219089Spjd ASSERT3U(vd->vdev_dtl_smo.smo_alloc, ==, 0); 1999219089Spjd (void) dmu_object_free(mos, vd->vdev_dtl_smo.smo_object, tx); 2000219089Spjd vd->vdev_dtl_smo.smo_object = 0; 2001219089Spjd } 2002219089Spjd 2003219089Spjd if (vd->vdev_ms != NULL) { 2004219089Spjd for (int m = 0; m < vd->vdev_ms_count; m++) { 2005219089Spjd metaslab_t *msp = vd->vdev_ms[m]; 2006219089Spjd 2007219089Spjd if (msp == NULL || msp->ms_smo.smo_object == 0) 2008219089Spjd continue; 2009219089Spjd 2010219089Spjd ASSERT3U(msp->ms_smo.smo_alloc, ==, 0); 2011219089Spjd (void) dmu_object_free(mos, msp->ms_smo.smo_object, tx); 2012219089Spjd msp->ms_smo.smo_object = 0; 2013219089Spjd } 2014219089Spjd } 2015219089Spjd 2016219089Spjd if (vd->vdev_ms_array) { 2017219089Spjd (void) dmu_object_free(mos, vd->vdev_ms_array, tx); 2018219089Spjd vd->vdev_ms_array = 0; 2019219089Spjd vd->vdev_ms_shift = 0; 2020219089Spjd } 2021219089Spjd dmu_tx_commit(tx); 2022219089Spjd} 2023219089Spjd 2024219089Spjdvoid 2025168404Spjdvdev_sync_done(vdev_t *vd, uint64_t txg) 2026168404Spjd{ 2027168404Spjd metaslab_t *msp; 2028211931Smm boolean_t reassess = !txg_list_empty(&vd->vdev_ms_list, TXG_CLEAN(txg)); 2029168404Spjd 2030219089Spjd ASSERT(!vd->vdev_ishole); 2031219089Spjd 2032168404Spjd while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) 2033168404Spjd metaslab_sync_done(msp, txg); 2034211931Smm 2035211931Smm if (reassess) 2036211931Smm metaslab_sync_reassess(vd->vdev_mg); 2037168404Spjd} 2038168404Spjd 2039168404Spjdvoid 2040168404Spjdvdev_sync(vdev_t *vd, uint64_t txg) 2041168404Spjd{ 2042168404Spjd spa_t *spa = vd->vdev_spa; 2043168404Spjd vdev_t *lvd; 2044168404Spjd metaslab_t *msp; 2045168404Spjd dmu_tx_t *tx; 2046168404Spjd 2047219089Spjd ASSERT(!vd->vdev_ishole); 2048219089Spjd 2049168404Spjd if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { 2050168404Spjd ASSERT(vd == vd->vdev_top); 2051168404Spjd tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 2052168404Spjd vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, 2053168404Spjd DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); 2054168404Spjd ASSERT(vd->vdev_ms_array != 0); 2055168404Spjd vdev_config_dirty(vd); 2056168404Spjd dmu_tx_commit(tx); 2057168404Spjd } 2058168404Spjd 2059219089Spjd /* 2060219089Spjd * Remove the metadata associated with this vdev once it's empty. 2061219089Spjd */ 2062219089Spjd if (vd->vdev_stat.vs_alloc == 0 && vd->vdev_removing) 2063219089Spjd vdev_remove(vd, txg); 2064219089Spjd 2065168404Spjd while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { 2066168404Spjd metaslab_sync(msp, txg); 2067168404Spjd (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); 2068168404Spjd } 2069168404Spjd 2070168404Spjd while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) 2071168404Spjd vdev_dtl_sync(lvd, txg); 2072168404Spjd 2073168404Spjd (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); 2074168404Spjd} 2075168404Spjd 2076168404Spjduint64_t 2077168404Spjdvdev_psize_to_asize(vdev_t *vd, uint64_t psize) 2078168404Spjd{ 2079168404Spjd return (vd->vdev_ops->vdev_op_asize(vd, psize)); 2080168404Spjd} 2081168404Spjd 2082185029Spjd/* 2083185029Spjd * Mark the given vdev faulted. A faulted vdev behaves as if the device could 2084185029Spjd * not be opened, and no I/O is attempted. 2085185029Spjd */ 2086185029Spjdint 2087219089Spjdvdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux) 2088168404Spjd{ 2089219089Spjd vdev_t *vd, *tvd; 2090168404Spjd 2091219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2092185029Spjd 2093185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2094185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2095185029Spjd 2096185029Spjd if (!vd->vdev_ops->vdev_op_leaf) 2097185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2098185029Spjd 2099219089Spjd tvd = vd->vdev_top; 2100219089Spjd 2101185029Spjd /* 2102219089Spjd * We don't directly use the aux state here, but if we do a 2103219089Spjd * vdev_reopen(), we need this value to be present to remember why we 2104219089Spjd * were faulted. 2105219089Spjd */ 2106219089Spjd vd->vdev_label_aux = aux; 2107219089Spjd 2108219089Spjd /* 2109185029Spjd * Faulted state takes precedence over degraded. 2110185029Spjd */ 2111219089Spjd vd->vdev_delayed_close = B_FALSE; 2112185029Spjd vd->vdev_faulted = 1ULL; 2113185029Spjd vd->vdev_degraded = 0ULL; 2114219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, aux); 2115185029Spjd 2116185029Spjd /* 2117219089Spjd * If this device has the only valid copy of the data, then 2118219089Spjd * back off and simply mark the vdev as degraded instead. 2119185029Spjd */ 2120219089Spjd if (!tvd->vdev_islog && vd->vdev_aux == NULL && vdev_dtl_required(vd)) { 2121185029Spjd vd->vdev_degraded = 1ULL; 2122185029Spjd vd->vdev_faulted = 0ULL; 2123185029Spjd 2124185029Spjd /* 2125185029Spjd * If we reopen the device and it's not dead, only then do we 2126185029Spjd * mark it degraded. 2127185029Spjd */ 2128219089Spjd vdev_reopen(tvd); 2129185029Spjd 2130219089Spjd if (vdev_readable(vd)) 2131219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, aux); 2132185029Spjd } 2133185029Spjd 2134185029Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2135168404Spjd} 2136168404Spjd 2137185029Spjd/* 2138185029Spjd * Mark the given vdev degraded. A degraded vdev is purely an indication to the 2139185029Spjd * user that something is wrong. The vdev continues to operate as normal as far 2140185029Spjd * as I/O is concerned. 2141185029Spjd */ 2142185029Spjdint 2143219089Spjdvdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux) 2144168404Spjd{ 2145185029Spjd vdev_t *vd; 2146168404Spjd 2147219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2148168404Spjd 2149185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2150185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2151168404Spjd 2152185029Spjd if (!vd->vdev_ops->vdev_op_leaf) 2153185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2154185029Spjd 2155185029Spjd /* 2156185029Spjd * If the vdev is already faulted, then don't do anything. 2157185029Spjd */ 2158185029Spjd if (vd->vdev_faulted || vd->vdev_degraded) 2159185029Spjd return (spa_vdev_state_exit(spa, NULL, 0)); 2160185029Spjd 2161185029Spjd vd->vdev_degraded = 1ULL; 2162185029Spjd if (!vdev_is_dead(vd)) 2163185029Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, 2164219089Spjd aux); 2165185029Spjd 2166185029Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2167168404Spjd} 2168168404Spjd 2169185029Spjd/* 2170185029Spjd * Online the given vdev. If 'unspare' is set, it implies two things. First, 2171185029Spjd * any attached spare device should be detached when the device finishes 2172185029Spjd * resilvering. Second, the online should be treated like a 'test' online case, 2173185029Spjd * so no FMA events are generated if the device fails to open. 2174185029Spjd */ 2175168404Spjdint 2176185029Spjdvdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) 2177168404Spjd{ 2178219089Spjd vdev_t *vd, *tvd, *pvd, *rvd = spa->spa_root_vdev; 2179168404Spjd 2180219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2181168404Spjd 2182185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2183185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2184168404Spjd 2185168404Spjd if (!vd->vdev_ops->vdev_op_leaf) 2186185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2187168404Spjd 2188219089Spjd tvd = vd->vdev_top; 2189168404Spjd vd->vdev_offline = B_FALSE; 2190168404Spjd vd->vdev_tmpoffline = B_FALSE; 2191185029Spjd vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); 2192185029Spjd vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); 2193219089Spjd 2194219089Spjd /* XXX - L2ARC 1.0 does not support expansion */ 2195219089Spjd if (!vd->vdev_aux) { 2196219089Spjd for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2197219089Spjd pvd->vdev_expanding = !!(flags & ZFS_ONLINE_EXPAND); 2198219089Spjd } 2199219089Spjd 2200219089Spjd vdev_reopen(tvd); 2201185029Spjd vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; 2202168404Spjd 2203219089Spjd if (!vd->vdev_aux) { 2204219089Spjd for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2205219089Spjd pvd->vdev_expanding = B_FALSE; 2206219089Spjd } 2207219089Spjd 2208185029Spjd if (newstate) 2209185029Spjd *newstate = vd->vdev_state; 2210185029Spjd if ((flags & ZFS_ONLINE_UNSPARE) && 2211185029Spjd !vdev_is_dead(vd) && vd->vdev_parent && 2212185029Spjd vd->vdev_parent->vdev_ops == &vdev_spare_ops && 2213185029Spjd vd->vdev_parent->vdev_child[0] == vd) 2214185029Spjd vd->vdev_unspare = B_TRUE; 2215168404Spjd 2216219089Spjd if ((flags & ZFS_ONLINE_EXPAND) || spa->spa_autoexpand) { 2217219089Spjd 2218219089Spjd /* XXX - L2ARC 1.0 does not support expansion */ 2219219089Spjd if (vd->vdev_aux) 2220219089Spjd return (spa_vdev_state_exit(spa, vd, ENOTSUP)); 2221219089Spjd spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2222219089Spjd } 2223209962Smm return (spa_vdev_state_exit(spa, vd, 0)); 2224168404Spjd} 2225168404Spjd 2226219089Spjdstatic int 2227219089Spjdvdev_offline_locked(spa_t *spa, uint64_t guid, uint64_t flags) 2228168404Spjd{ 2229213197Smm vdev_t *vd, *tvd; 2230219089Spjd int error = 0; 2231219089Spjd uint64_t generation; 2232219089Spjd metaslab_group_t *mg; 2233168404Spjd 2234219089Spjdtop: 2235219089Spjd spa_vdev_state_enter(spa, SCL_ALLOC); 2236168404Spjd 2237185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2238185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2239168404Spjd 2240168404Spjd if (!vd->vdev_ops->vdev_op_leaf) 2241185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2242168404Spjd 2243213197Smm tvd = vd->vdev_top; 2244219089Spjd mg = tvd->vdev_mg; 2245219089Spjd generation = spa->spa_config_generation + 1; 2246213197Smm 2247168404Spjd /* 2248168404Spjd * If the device isn't already offline, try to offline it. 2249168404Spjd */ 2250168404Spjd if (!vd->vdev_offline) { 2251168404Spjd /* 2252209962Smm * If this device has the only valid copy of some data, 2253213197Smm * don't allow it to be offlined. Log devices are always 2254213197Smm * expendable. 2255168404Spjd */ 2256213197Smm if (!tvd->vdev_islog && vd->vdev_aux == NULL && 2257213197Smm vdev_dtl_required(vd)) 2258185029Spjd return (spa_vdev_state_exit(spa, NULL, EBUSY)); 2259168404Spjd 2260168404Spjd /* 2261219089Spjd * If the top-level is a slog and it has had allocations 2262219089Spjd * then proceed. We check that the vdev's metaslab group 2263219089Spjd * is not NULL since it's possible that we may have just 2264219089Spjd * added this vdev but not yet initialized its metaslabs. 2265219089Spjd */ 2266219089Spjd if (tvd->vdev_islog && mg != NULL) { 2267219089Spjd /* 2268219089Spjd * Prevent any future allocations. 2269219089Spjd */ 2270219089Spjd metaslab_group_passivate(mg); 2271219089Spjd (void) spa_vdev_state_exit(spa, vd, 0); 2272219089Spjd 2273219089Spjd error = spa_offline_log(spa); 2274219089Spjd 2275219089Spjd spa_vdev_state_enter(spa, SCL_ALLOC); 2276219089Spjd 2277219089Spjd /* 2278219089Spjd * Check to see if the config has changed. 2279219089Spjd */ 2280219089Spjd if (error || generation != spa->spa_config_generation) { 2281219089Spjd metaslab_group_activate(mg); 2282219089Spjd if (error) 2283219089Spjd return (spa_vdev_state_exit(spa, 2284219089Spjd vd, error)); 2285219089Spjd (void) spa_vdev_state_exit(spa, vd, 0); 2286219089Spjd goto top; 2287219089Spjd } 2288219089Spjd ASSERT3U(tvd->vdev_stat.vs_alloc, ==, 0); 2289219089Spjd } 2290219089Spjd 2291219089Spjd /* 2292168404Spjd * Offline this device and reopen its top-level vdev. 2293213197Smm * If the top-level vdev is a log device then just offline 2294213197Smm * it. Otherwise, if this action results in the top-level 2295213197Smm * vdev becoming unusable, undo it and fail the request. 2296168404Spjd */ 2297168404Spjd vd->vdev_offline = B_TRUE; 2298213197Smm vdev_reopen(tvd); 2299213197Smm 2300213197Smm if (!tvd->vdev_islog && vd->vdev_aux == NULL && 2301213197Smm vdev_is_dead(tvd)) { 2302168404Spjd vd->vdev_offline = B_FALSE; 2303213197Smm vdev_reopen(tvd); 2304185029Spjd return (spa_vdev_state_exit(spa, NULL, EBUSY)); 2305168404Spjd } 2306219089Spjd 2307219089Spjd /* 2308219089Spjd * Add the device back into the metaslab rotor so that 2309219089Spjd * once we online the device it's open for business. 2310219089Spjd */ 2311219089Spjd if (tvd->vdev_islog && mg != NULL) 2312219089Spjd metaslab_group_activate(mg); 2313168404Spjd } 2314168404Spjd 2315185029Spjd vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); 2316168404Spjd 2317219089Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2318219089Spjd} 2319213197Smm 2320219089Spjdint 2321219089Spjdvdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) 2322219089Spjd{ 2323219089Spjd int error; 2324213197Smm 2325219089Spjd mutex_enter(&spa->spa_vdev_top_lock); 2326219089Spjd error = vdev_offline_locked(spa, guid, flags); 2327219089Spjd mutex_exit(&spa->spa_vdev_top_lock); 2328219089Spjd 2329219089Spjd return (error); 2330168404Spjd} 2331168404Spjd 2332168404Spjd/* 2333168404Spjd * Clear the error counts associated with this vdev. Unlike vdev_online() and 2334168404Spjd * vdev_offline(), we assume the spa config is locked. We also clear all 2335168404Spjd * children. If 'vd' is NULL, then the user wants to clear all vdevs. 2336168404Spjd */ 2337168404Spjdvoid 2338168404Spjdvdev_clear(spa_t *spa, vdev_t *vd) 2339168404Spjd{ 2340185029Spjd vdev_t *rvd = spa->spa_root_vdev; 2341168404Spjd 2342185029Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 2343185029Spjd 2344168404Spjd if (vd == NULL) 2345185029Spjd vd = rvd; 2346168404Spjd 2347168404Spjd vd->vdev_stat.vs_read_errors = 0; 2348168404Spjd vd->vdev_stat.vs_write_errors = 0; 2349168404Spjd vd->vdev_stat.vs_checksum_errors = 0; 2350168404Spjd 2351185029Spjd for (int c = 0; c < vd->vdev_children; c++) 2352168404Spjd vdev_clear(spa, vd->vdev_child[c]); 2353185029Spjd 2354185029Spjd /* 2355185029Spjd * If we're in the FAULTED state or have experienced failed I/O, then 2356185029Spjd * clear the persistent state and attempt to reopen the device. We 2357185029Spjd * also mark the vdev config dirty, so that the new faulted state is 2358185029Spjd * written out to disk. 2359185029Spjd */ 2360185029Spjd if (vd->vdev_faulted || vd->vdev_degraded || 2361185029Spjd !vdev_readable(vd) || !vdev_writeable(vd)) { 2362185029Spjd 2363219089Spjd /* 2364219089Spjd * When reopening in reponse to a clear event, it may be due to 2365219089Spjd * a fmadm repair request. In this case, if the device is 2366219089Spjd * still broken, we want to still post the ereport again. 2367219089Spjd */ 2368219089Spjd vd->vdev_forcefault = B_TRUE; 2369219089Spjd 2370219089Spjd vd->vdev_faulted = vd->vdev_degraded = 0ULL; 2371185029Spjd vd->vdev_cant_read = B_FALSE; 2372185029Spjd vd->vdev_cant_write = B_FALSE; 2373185029Spjd 2374219089Spjd vdev_reopen(vd == rvd ? rvd : vd->vdev_top); 2375185029Spjd 2376219089Spjd vd->vdev_forcefault = B_FALSE; 2377219089Spjd 2378219089Spjd if (vd != rvd && vdev_writeable(vd->vdev_top)) 2379185029Spjd vdev_state_dirty(vd->vdev_top); 2380185029Spjd 2381185029Spjd if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) 2382185029Spjd spa_async_request(spa, SPA_ASYNC_RESILVER); 2383185029Spjd 2384185029Spjd spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR); 2385185029Spjd } 2386219089Spjd 2387219089Spjd /* 2388219089Spjd * When clearing a FMA-diagnosed fault, we always want to 2389219089Spjd * unspare the device, as we assume that the original spare was 2390219089Spjd * done in response to the FMA fault. 2391219089Spjd */ 2392219089Spjd if (!vdev_is_dead(vd) && vd->vdev_parent != NULL && 2393219089Spjd vd->vdev_parent->vdev_ops == &vdev_spare_ops && 2394219089Spjd vd->vdev_parent->vdev_child[0] == vd) 2395219089Spjd vd->vdev_unspare = B_TRUE; 2396168404Spjd} 2397168404Spjd 2398185029Spjdboolean_t 2399168404Spjdvdev_is_dead(vdev_t *vd) 2400168404Spjd{ 2401219089Spjd /* 2402219089Spjd * Holes and missing devices are always considered "dead". 2403219089Spjd * This simplifies the code since we don't have to check for 2404219089Spjd * these types of devices in the various code paths. 2405219089Spjd * Instead we rely on the fact that we skip over dead devices 2406219089Spjd * before issuing I/O to them. 2407219089Spjd */ 2408219089Spjd return (vd->vdev_state < VDEV_STATE_DEGRADED || vd->vdev_ishole || 2409219089Spjd vd->vdev_ops == &vdev_missing_ops); 2410168404Spjd} 2411168404Spjd 2412185029Spjdboolean_t 2413185029Spjdvdev_readable(vdev_t *vd) 2414168404Spjd{ 2415185029Spjd return (!vdev_is_dead(vd) && !vd->vdev_cant_read); 2416185029Spjd} 2417168404Spjd 2418185029Spjdboolean_t 2419185029Spjdvdev_writeable(vdev_t *vd) 2420185029Spjd{ 2421185029Spjd return (!vdev_is_dead(vd) && !vd->vdev_cant_write); 2422185029Spjd} 2423168404Spjd 2424185029Spjdboolean_t 2425208370Smmvdev_allocatable(vdev_t *vd) 2426208370Smm{ 2427209962Smm uint64_t state = vd->vdev_state; 2428209962Smm 2429208370Smm /* 2430209962Smm * We currently allow allocations from vdevs which may be in the 2431208370Smm * process of reopening (i.e. VDEV_STATE_CLOSED). If the device 2432208370Smm * fails to reopen then we'll catch it later when we're holding 2433209962Smm * the proper locks. Note that we have to get the vdev state 2434209962Smm * in a local variable because although it changes atomically, 2435209962Smm * we're asking two separate questions about it. 2436208370Smm */ 2437209962Smm return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) && 2438219089Spjd !vd->vdev_cant_write && !vd->vdev_ishole); 2439208370Smm} 2440208370Smm 2441208370Smmboolean_t 2442185029Spjdvdev_accessible(vdev_t *vd, zio_t *zio) 2443185029Spjd{ 2444185029Spjd ASSERT(zio->io_vd == vd); 2445168404Spjd 2446185029Spjd if (vdev_is_dead(vd) || vd->vdev_remove_wanted) 2447185029Spjd return (B_FALSE); 2448168404Spjd 2449185029Spjd if (zio->io_type == ZIO_TYPE_READ) 2450185029Spjd return (!vd->vdev_cant_read); 2451168404Spjd 2452185029Spjd if (zio->io_type == ZIO_TYPE_WRITE) 2453185029Spjd return (!vd->vdev_cant_write); 2454168404Spjd 2455185029Spjd return (B_TRUE); 2456168404Spjd} 2457168404Spjd 2458168404Spjd/* 2459168404Spjd * Get statistics for the given vdev. 2460168404Spjd */ 2461168404Spjdvoid 2462168404Spjdvdev_get_stats(vdev_t *vd, vdev_stat_t *vs) 2463168404Spjd{ 2464168404Spjd vdev_t *rvd = vd->vdev_spa->spa_root_vdev; 2465168404Spjd 2466168404Spjd mutex_enter(&vd->vdev_stat_lock); 2467168404Spjd bcopy(&vd->vdev_stat, vs, sizeof (*vs)); 2468168404Spjd vs->vs_timestamp = gethrtime() - vs->vs_timestamp; 2469168404Spjd vs->vs_state = vd->vdev_state; 2470219089Spjd vs->vs_rsize = vdev_get_min_asize(vd); 2471219089Spjd if (vd->vdev_ops->vdev_op_leaf) 2472219089Spjd vs->vs_rsize += VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE; 2473168404Spjd mutex_exit(&vd->vdev_stat_lock); 2474168404Spjd 2475168404Spjd /* 2476168404Spjd * If we're getting stats on the root vdev, aggregate the I/O counts 2477168404Spjd * over all top-level vdevs (i.e. the direct children of the root). 2478168404Spjd */ 2479168404Spjd if (vd == rvd) { 2480185029Spjd for (int c = 0; c < rvd->vdev_children; c++) { 2481168404Spjd vdev_t *cvd = rvd->vdev_child[c]; 2482168404Spjd vdev_stat_t *cvs = &cvd->vdev_stat; 2483168404Spjd 2484168404Spjd mutex_enter(&vd->vdev_stat_lock); 2485185029Spjd for (int t = 0; t < ZIO_TYPES; t++) { 2486168404Spjd vs->vs_ops[t] += cvs->vs_ops[t]; 2487168404Spjd vs->vs_bytes[t] += cvs->vs_bytes[t]; 2488168404Spjd } 2489219089Spjd cvs->vs_scan_removing = cvd->vdev_removing; 2490168404Spjd mutex_exit(&vd->vdev_stat_lock); 2491168404Spjd } 2492168404Spjd } 2493168404Spjd} 2494168404Spjd 2495168404Spjdvoid 2496185029Spjdvdev_clear_stats(vdev_t *vd) 2497168404Spjd{ 2498185029Spjd mutex_enter(&vd->vdev_stat_lock); 2499185029Spjd vd->vdev_stat.vs_space = 0; 2500185029Spjd vd->vdev_stat.vs_dspace = 0; 2501185029Spjd vd->vdev_stat.vs_alloc = 0; 2502185029Spjd mutex_exit(&vd->vdev_stat_lock); 2503185029Spjd} 2504185029Spjd 2505185029Spjdvoid 2506219089Spjdvdev_scan_stat_init(vdev_t *vd) 2507219089Spjd{ 2508219089Spjd vdev_stat_t *vs = &vd->vdev_stat; 2509219089Spjd 2510219089Spjd for (int c = 0; c < vd->vdev_children; c++) 2511219089Spjd vdev_scan_stat_init(vd->vdev_child[c]); 2512219089Spjd 2513219089Spjd mutex_enter(&vd->vdev_stat_lock); 2514219089Spjd vs->vs_scan_processed = 0; 2515219089Spjd mutex_exit(&vd->vdev_stat_lock); 2516219089Spjd} 2517219089Spjd 2518219089Spjdvoid 2519185029Spjdvdev_stat_update(zio_t *zio, uint64_t psize) 2520185029Spjd{ 2521209962Smm spa_t *spa = zio->io_spa; 2522209962Smm vdev_t *rvd = spa->spa_root_vdev; 2523185029Spjd vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; 2524168404Spjd vdev_t *pvd; 2525168404Spjd uint64_t txg = zio->io_txg; 2526168404Spjd vdev_stat_t *vs = &vd->vdev_stat; 2527168404Spjd zio_type_t type = zio->io_type; 2528168404Spjd int flags = zio->io_flags; 2529168404Spjd 2530185029Spjd /* 2531185029Spjd * If this i/o is a gang leader, it didn't do any actual work. 2532185029Spjd */ 2533185029Spjd if (zio->io_gang_tree) 2534185029Spjd return; 2535185029Spjd 2536168404Spjd if (zio->io_error == 0) { 2537185029Spjd /* 2538185029Spjd * If this is a root i/o, don't count it -- we've already 2539185029Spjd * counted the top-level vdevs, and vdev_get_stats() will 2540185029Spjd * aggregate them when asked. This reduces contention on 2541185029Spjd * the root vdev_stat_lock and implicitly handles blocks 2542185029Spjd * that compress away to holes, for which there is no i/o. 2543185029Spjd * (Holes never create vdev children, so all the counters 2544185029Spjd * remain zero, which is what we want.) 2545185029Spjd * 2546185029Spjd * Note: this only applies to successful i/o (io_error == 0) 2547185029Spjd * because unlike i/o counts, errors are not additive. 2548185029Spjd * When reading a ditto block, for example, failure of 2549185029Spjd * one top-level vdev does not imply a root-level error. 2550185029Spjd */ 2551185029Spjd if (vd == rvd) 2552185029Spjd return; 2553185029Spjd 2554185029Spjd ASSERT(vd == zio->io_vd); 2555209962Smm 2556209962Smm if (flags & ZIO_FLAG_IO_BYPASS) 2557209962Smm return; 2558209962Smm 2559209962Smm mutex_enter(&vd->vdev_stat_lock); 2560209962Smm 2561185029Spjd if (flags & ZIO_FLAG_IO_REPAIR) { 2562219089Spjd if (flags & ZIO_FLAG_SCAN_THREAD) { 2563219089Spjd dsl_scan_phys_t *scn_phys = 2564219089Spjd &spa->spa_dsl_pool->dp_scan->scn_phys; 2565219089Spjd uint64_t *processed = &scn_phys->scn_processed; 2566219089Spjd 2567219089Spjd /* XXX cleanup? */ 2568219089Spjd if (vd->vdev_ops->vdev_op_leaf) 2569219089Spjd atomic_add_64(processed, psize); 2570219089Spjd vs->vs_scan_processed += psize; 2571219089Spjd } 2572219089Spjd 2573209962Smm if (flags & ZIO_FLAG_SELF_HEAL) 2574185029Spjd vs->vs_self_healed += psize; 2575168404Spjd } 2576209962Smm 2577209962Smm vs->vs_ops[type]++; 2578209962Smm vs->vs_bytes[type] += psize; 2579209962Smm 2580209962Smm mutex_exit(&vd->vdev_stat_lock); 2581168404Spjd return; 2582168404Spjd } 2583168404Spjd 2584168404Spjd if (flags & ZIO_FLAG_SPECULATIVE) 2585168404Spjd return; 2586168404Spjd 2587213198Smm /* 2588213198Smm * If this is an I/O error that is going to be retried, then ignore the 2589213198Smm * error. Otherwise, the user may interpret B_FAILFAST I/O errors as 2590213198Smm * hard errors, when in reality they can happen for any number of 2591213198Smm * innocuous reasons (bus resets, MPxIO link failure, etc). 2592213198Smm */ 2593213198Smm if (zio->io_error == EIO && 2594213198Smm !(zio->io_flags & ZIO_FLAG_IO_RETRY)) 2595213198Smm return; 2596213198Smm 2597219089Spjd /* 2598219089Spjd * Intent logs writes won't propagate their error to the root 2599219089Spjd * I/O so don't mark these types of failures as pool-level 2600219089Spjd * errors. 2601219089Spjd */ 2602219089Spjd if (zio->io_vd == NULL && (zio->io_flags & ZIO_FLAG_DONT_PROPAGATE)) 2603219089Spjd return; 2604219089Spjd 2605185029Spjd mutex_enter(&vd->vdev_stat_lock); 2606209962Smm if (type == ZIO_TYPE_READ && !vdev_is_dead(vd)) { 2607185029Spjd if (zio->io_error == ECKSUM) 2608185029Spjd vs->vs_checksum_errors++; 2609185029Spjd else 2610185029Spjd vs->vs_read_errors++; 2611168404Spjd } 2612209962Smm if (type == ZIO_TYPE_WRITE && !vdev_is_dead(vd)) 2613185029Spjd vs->vs_write_errors++; 2614185029Spjd mutex_exit(&vd->vdev_stat_lock); 2615168404Spjd 2616209962Smm if (type == ZIO_TYPE_WRITE && txg != 0 && 2617209962Smm (!(flags & ZIO_FLAG_IO_REPAIR) || 2618219089Spjd (flags & ZIO_FLAG_SCAN_THREAD) || 2619219089Spjd spa->spa_claiming)) { 2620209962Smm /* 2621219089Spjd * This is either a normal write (not a repair), or it's 2622219089Spjd * a repair induced by the scrub thread, or it's a repair 2623219089Spjd * made by zil_claim() during spa_load() in the first txg. 2624219089Spjd * In the normal case, we commit the DTL change in the same 2625219089Spjd * txg as the block was born. In the scrub-induced repair 2626219089Spjd * case, we know that scrubs run in first-pass syncing context, 2627219089Spjd * so we commit the DTL change in spa_syncing_txg(spa). 2628219089Spjd * In the zil_claim() case, we commit in spa_first_txg(spa). 2629209962Smm * 2630209962Smm * We currently do not make DTL entries for failed spontaneous 2631209962Smm * self-healing writes triggered by normal (non-scrubbing) 2632209962Smm * reads, because we have no transactional context in which to 2633209962Smm * do so -- and it's not clear that it'd be desirable anyway. 2634209962Smm */ 2635209962Smm if (vd->vdev_ops->vdev_op_leaf) { 2636209962Smm uint64_t commit_txg = txg; 2637219089Spjd if (flags & ZIO_FLAG_SCAN_THREAD) { 2638209962Smm ASSERT(flags & ZIO_FLAG_IO_REPAIR); 2639209962Smm ASSERT(spa_sync_pass(spa) == 1); 2640209962Smm vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1); 2641219089Spjd commit_txg = spa_syncing_txg(spa); 2642219089Spjd } else if (spa->spa_claiming) { 2643219089Spjd ASSERT(flags & ZIO_FLAG_IO_REPAIR); 2644219089Spjd commit_txg = spa_first_txg(spa); 2645209962Smm } 2646219089Spjd ASSERT(commit_txg >= spa_syncing_txg(spa)); 2647209962Smm if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1)) 2648168404Spjd return; 2649209962Smm for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2650209962Smm vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1); 2651209962Smm vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg); 2652168404Spjd } 2653209962Smm if (vd != rvd) 2654209962Smm vdev_dtl_dirty(vd, DTL_MISSING, txg, 1); 2655168404Spjd } 2656168404Spjd} 2657168404Spjd 2658168404Spjd/* 2659219089Spjd * Update the in-core space usage stats for this vdev, its metaslab class, 2660219089Spjd * and the root vdev. 2661168404Spjd */ 2662168404Spjdvoid 2663219089Spjdvdev_space_update(vdev_t *vd, int64_t alloc_delta, int64_t defer_delta, 2664219089Spjd int64_t space_delta) 2665168404Spjd{ 2666168404Spjd int64_t dspace_delta = space_delta; 2667185029Spjd spa_t *spa = vd->vdev_spa; 2668185029Spjd vdev_t *rvd = spa->spa_root_vdev; 2669219089Spjd metaslab_group_t *mg = vd->vdev_mg; 2670219089Spjd metaslab_class_t *mc = mg ? mg->mg_class : NULL; 2671168404Spjd 2672185029Spjd ASSERT(vd == vd->vdev_top); 2673168404Spjd 2674185029Spjd /* 2675185029Spjd * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion 2676185029Spjd * factor. We must calculate this here and not at the root vdev 2677185029Spjd * because the root vdev's psize-to-asize is simply the max of its 2678185029Spjd * childrens', thus not accurate enough for us. 2679185029Spjd */ 2680185029Spjd ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); 2681213197Smm ASSERT(vd->vdev_deflate_ratio != 0 || vd->vdev_isl2cache); 2682185029Spjd dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * 2683185029Spjd vd->vdev_deflate_ratio; 2684185029Spjd 2685185029Spjd mutex_enter(&vd->vdev_stat_lock); 2686219089Spjd vd->vdev_stat.vs_alloc += alloc_delta; 2687185029Spjd vd->vdev_stat.vs_space += space_delta; 2688185029Spjd vd->vdev_stat.vs_dspace += dspace_delta; 2689185029Spjd mutex_exit(&vd->vdev_stat_lock); 2690185029Spjd 2691219089Spjd if (mc == spa_normal_class(spa)) { 2692185029Spjd mutex_enter(&rvd->vdev_stat_lock); 2693219089Spjd rvd->vdev_stat.vs_alloc += alloc_delta; 2694185029Spjd rvd->vdev_stat.vs_space += space_delta; 2695185029Spjd rvd->vdev_stat.vs_dspace += dspace_delta; 2696185029Spjd mutex_exit(&rvd->vdev_stat_lock); 2697185029Spjd } 2698219089Spjd 2699219089Spjd if (mc != NULL) { 2700219089Spjd ASSERT(rvd == vd->vdev_parent); 2701219089Spjd ASSERT(vd->vdev_ms_count != 0); 2702219089Spjd 2703219089Spjd metaslab_class_space_update(mc, 2704219089Spjd alloc_delta, defer_delta, space_delta, dspace_delta); 2705219089Spjd } 2706168404Spjd} 2707168404Spjd 2708168404Spjd/* 2709168404Spjd * Mark a top-level vdev's config as dirty, placing it on the dirty list 2710168404Spjd * so that it will be written out next time the vdev configuration is synced. 2711168404Spjd * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. 2712168404Spjd */ 2713168404Spjdvoid 2714168404Spjdvdev_config_dirty(vdev_t *vd) 2715168404Spjd{ 2716168404Spjd spa_t *spa = vd->vdev_spa; 2717168404Spjd vdev_t *rvd = spa->spa_root_vdev; 2718168404Spjd int c; 2719168404Spjd 2720219089Spjd ASSERT(spa_writeable(spa)); 2721219089Spjd 2722168404Spjd /* 2723209962Smm * If this is an aux vdev (as with l2cache and spare devices), then we 2724209962Smm * update the vdev config manually and set the sync flag. 2725185029Spjd */ 2726185029Spjd if (vd->vdev_aux != NULL) { 2727185029Spjd spa_aux_vdev_t *sav = vd->vdev_aux; 2728185029Spjd nvlist_t **aux; 2729185029Spjd uint_t naux; 2730185029Spjd 2731185029Spjd for (c = 0; c < sav->sav_count; c++) { 2732185029Spjd if (sav->sav_vdevs[c] == vd) 2733185029Spjd break; 2734185029Spjd } 2735185029Spjd 2736185029Spjd if (c == sav->sav_count) { 2737185029Spjd /* 2738185029Spjd * We're being removed. There's nothing more to do. 2739185029Spjd */ 2740185029Spjd ASSERT(sav->sav_sync == B_TRUE); 2741185029Spjd return; 2742185029Spjd } 2743185029Spjd 2744185029Spjd sav->sav_sync = B_TRUE; 2745185029Spjd 2746209962Smm if (nvlist_lookup_nvlist_array(sav->sav_config, 2747209962Smm ZPOOL_CONFIG_L2CACHE, &aux, &naux) != 0) { 2748209962Smm VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 2749209962Smm ZPOOL_CONFIG_SPARES, &aux, &naux) == 0); 2750209962Smm } 2751185029Spjd 2752185029Spjd ASSERT(c < naux); 2753185029Spjd 2754185029Spjd /* 2755185029Spjd * Setting the nvlist in the middle if the array is a little 2756185029Spjd * sketchy, but it will work. 2757185029Spjd */ 2758185029Spjd nvlist_free(aux[c]); 2759219089Spjd aux[c] = vdev_config_generate(spa, vd, B_TRUE, 0); 2760185029Spjd 2761185029Spjd return; 2762185029Spjd } 2763185029Spjd 2764185029Spjd /* 2765185029Spjd * The dirty list is protected by the SCL_CONFIG lock. The caller 2766185029Spjd * must either hold SCL_CONFIG as writer, or must be the sync thread 2767185029Spjd * (which holds SCL_CONFIG as reader). There's only one sync thread, 2768168404Spjd * so this is sufficient to ensure mutual exclusion. 2769168404Spjd */ 2770185029Spjd ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 2771185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2772185029Spjd spa_config_held(spa, SCL_CONFIG, RW_READER))); 2773168404Spjd 2774168404Spjd if (vd == rvd) { 2775168404Spjd for (c = 0; c < rvd->vdev_children; c++) 2776168404Spjd vdev_config_dirty(rvd->vdev_child[c]); 2777168404Spjd } else { 2778168404Spjd ASSERT(vd == vd->vdev_top); 2779168404Spjd 2780219089Spjd if (!list_link_active(&vd->vdev_config_dirty_node) && 2781219089Spjd !vd->vdev_ishole) 2782185029Spjd list_insert_head(&spa->spa_config_dirty_list, vd); 2783168404Spjd } 2784168404Spjd} 2785168404Spjd 2786168404Spjdvoid 2787168404Spjdvdev_config_clean(vdev_t *vd) 2788168404Spjd{ 2789168404Spjd spa_t *spa = vd->vdev_spa; 2790168404Spjd 2791185029Spjd ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 2792185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2793185029Spjd spa_config_held(spa, SCL_CONFIG, RW_READER))); 2794168404Spjd 2795185029Spjd ASSERT(list_link_active(&vd->vdev_config_dirty_node)); 2796185029Spjd list_remove(&spa->spa_config_dirty_list, vd); 2797168404Spjd} 2798168404Spjd 2799185029Spjd/* 2800185029Spjd * Mark a top-level vdev's state as dirty, so that the next pass of 2801185029Spjd * spa_sync() can convert this into vdev_config_dirty(). We distinguish 2802185029Spjd * the state changes from larger config changes because they require 2803185029Spjd * much less locking, and are often needed for administrative actions. 2804185029Spjd */ 2805168404Spjdvoid 2806185029Spjdvdev_state_dirty(vdev_t *vd) 2807185029Spjd{ 2808185029Spjd spa_t *spa = vd->vdev_spa; 2809185029Spjd 2810219089Spjd ASSERT(spa_writeable(spa)); 2811185029Spjd ASSERT(vd == vd->vdev_top); 2812185029Spjd 2813185029Spjd /* 2814185029Spjd * The state list is protected by the SCL_STATE lock. The caller 2815185029Spjd * must either hold SCL_STATE as writer, or must be the sync thread 2816185029Spjd * (which holds SCL_STATE as reader). There's only one sync thread, 2817185029Spjd * so this is sufficient to ensure mutual exclusion. 2818185029Spjd */ 2819185029Spjd ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 2820185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2821185029Spjd spa_config_held(spa, SCL_STATE, RW_READER))); 2822185029Spjd 2823219089Spjd if (!list_link_active(&vd->vdev_state_dirty_node) && !vd->vdev_ishole) 2824185029Spjd list_insert_head(&spa->spa_state_dirty_list, vd); 2825185029Spjd} 2826185029Spjd 2827185029Spjdvoid 2828185029Spjdvdev_state_clean(vdev_t *vd) 2829185029Spjd{ 2830185029Spjd spa_t *spa = vd->vdev_spa; 2831185029Spjd 2832185029Spjd ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 2833185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2834185029Spjd spa_config_held(spa, SCL_STATE, RW_READER))); 2835185029Spjd 2836185029Spjd ASSERT(list_link_active(&vd->vdev_state_dirty_node)); 2837185029Spjd list_remove(&spa->spa_state_dirty_list, vd); 2838185029Spjd} 2839185029Spjd 2840185029Spjd/* 2841185029Spjd * Propagate vdev state up from children to parent. 2842185029Spjd */ 2843185029Spjdvoid 2844168404Spjdvdev_propagate_state(vdev_t *vd) 2845168404Spjd{ 2846209962Smm spa_t *spa = vd->vdev_spa; 2847209962Smm vdev_t *rvd = spa->spa_root_vdev; 2848168404Spjd int degraded = 0, faulted = 0; 2849168404Spjd int corrupted = 0; 2850168404Spjd vdev_t *child; 2851168404Spjd 2852185029Spjd if (vd->vdev_children > 0) { 2853219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 2854185029Spjd child = vd->vdev_child[c]; 2855168404Spjd 2856219089Spjd /* 2857219089Spjd * Don't factor holes into the decision. 2858219089Spjd */ 2859219089Spjd if (child->vdev_ishole) 2860219089Spjd continue; 2861219089Spjd 2862185029Spjd if (!vdev_readable(child) || 2863209962Smm (!vdev_writeable(child) && spa_writeable(spa))) { 2864185029Spjd /* 2865185029Spjd * Root special: if there is a top-level log 2866185029Spjd * device, treat the root vdev as if it were 2867185029Spjd * degraded. 2868185029Spjd */ 2869185029Spjd if (child->vdev_islog && vd == rvd) 2870185029Spjd degraded++; 2871185029Spjd else 2872185029Spjd faulted++; 2873185029Spjd } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { 2874185029Spjd degraded++; 2875185029Spjd } 2876185029Spjd 2877185029Spjd if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) 2878185029Spjd corrupted++; 2879185029Spjd } 2880185029Spjd 2881185029Spjd vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); 2882185029Spjd 2883185029Spjd /* 2884185029Spjd * Root special: if there is a top-level vdev that cannot be 2885185029Spjd * opened due to corrupted metadata, then propagate the root 2886185029Spjd * vdev's aux state as 'corrupt' rather than 'insufficient 2887185029Spjd * replicas'. 2888185029Spjd */ 2889185029Spjd if (corrupted && vd == rvd && 2890185029Spjd rvd->vdev_state == VDEV_STATE_CANT_OPEN) 2891185029Spjd vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, 2892185029Spjd VDEV_AUX_CORRUPT_DATA); 2893168404Spjd } 2894168404Spjd 2895185029Spjd if (vd->vdev_parent) 2896185029Spjd vdev_propagate_state(vd->vdev_parent); 2897168404Spjd} 2898168404Spjd 2899168404Spjd/* 2900168404Spjd * Set a vdev's state. If this is during an open, we don't update the parent 2901168404Spjd * state, because we're in the process of opening children depth-first. 2902168404Spjd * Otherwise, we propagate the change to the parent. 2903168404Spjd * 2904168404Spjd * If this routine places a device in a faulted state, an appropriate ereport is 2905168404Spjd * generated. 2906168404Spjd */ 2907168404Spjdvoid 2908168404Spjdvdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) 2909168404Spjd{ 2910168404Spjd uint64_t save_state; 2911185029Spjd spa_t *spa = vd->vdev_spa; 2912168404Spjd 2913168404Spjd if (state == vd->vdev_state) { 2914168404Spjd vd->vdev_stat.vs_aux = aux; 2915168404Spjd return; 2916168404Spjd } 2917168404Spjd 2918168404Spjd save_state = vd->vdev_state; 2919168404Spjd 2920168404Spjd vd->vdev_state = state; 2921168404Spjd vd->vdev_stat.vs_aux = aux; 2922168404Spjd 2923173373Spjd /* 2924173373Spjd * If we are setting the vdev state to anything but an open state, then 2925219089Spjd * always close the underlying device unless the device has requested 2926219089Spjd * a delayed close (i.e. we're about to remove or fault the device). 2927219089Spjd * Otherwise, we keep accessible but invalid devices open forever. 2928219089Spjd * We don't call vdev_close() itself, because that implies some extra 2929219089Spjd * checks (offline, etc) that we don't want here. This is limited to 2930219089Spjd * leaf devices, because otherwise closing the device will affect other 2931219089Spjd * children. 2932173373Spjd */ 2933219089Spjd if (!vd->vdev_delayed_close && vdev_is_dead(vd) && 2934219089Spjd vd->vdev_ops->vdev_op_leaf) 2935173373Spjd vd->vdev_ops->vdev_op_close(vd); 2936173373Spjd 2937219089Spjd /* 2938219089Spjd * If we have brought this vdev back into service, we need 2939219089Spjd * to notify fmd so that it can gracefully repair any outstanding 2940219089Spjd * cases due to a missing device. We do this in all cases, even those 2941219089Spjd * that probably don't correlate to a repaired fault. This is sure to 2942219089Spjd * catch all cases, and we let the zfs-retire agent sort it out. If 2943219089Spjd * this is a transient state it's OK, as the retire agent will 2944219089Spjd * double-check the state of the vdev before repairing it. 2945219089Spjd */ 2946219089Spjd if (state == VDEV_STATE_HEALTHY && vd->vdev_ops->vdev_op_leaf && 2947219089Spjd vd->vdev_prevstate != state) 2948219089Spjd zfs_post_state_change(spa, vd); 2949219089Spjd 2950185029Spjd if (vd->vdev_removed && 2951185029Spjd state == VDEV_STATE_CANT_OPEN && 2952185029Spjd (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { 2953168404Spjd /* 2954185029Spjd * If the previous state is set to VDEV_STATE_REMOVED, then this 2955185029Spjd * device was previously marked removed and someone attempted to 2956185029Spjd * reopen it. If this failed due to a nonexistent device, then 2957185029Spjd * keep the device in the REMOVED state. We also let this be if 2958185029Spjd * it is one of our special test online cases, which is only 2959185029Spjd * attempting to online the device and shouldn't generate an FMA 2960185029Spjd * fault. 2961185029Spjd */ 2962185029Spjd vd->vdev_state = VDEV_STATE_REMOVED; 2963185029Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 2964185029Spjd } else if (state == VDEV_STATE_REMOVED) { 2965185029Spjd vd->vdev_removed = B_TRUE; 2966185029Spjd } else if (state == VDEV_STATE_CANT_OPEN) { 2967185029Spjd /* 2968219089Spjd * If we fail to open a vdev during an import or recovery, we 2969219089Spjd * mark it as "not available", which signifies that it was 2970219089Spjd * never there to begin with. Failure to open such a device 2971219089Spjd * is not considered an error. 2972168404Spjd */ 2973219089Spjd if ((spa_load_state(spa) == SPA_LOAD_IMPORT || 2974219089Spjd spa_load_state(spa) == SPA_LOAD_RECOVER) && 2975168404Spjd vd->vdev_ops->vdev_op_leaf) 2976168404Spjd vd->vdev_not_present = 1; 2977168404Spjd 2978168404Spjd /* 2979168404Spjd * Post the appropriate ereport. If the 'prevstate' field is 2980168404Spjd * set to something other than VDEV_STATE_UNKNOWN, it indicates 2981168404Spjd * that this is part of a vdev_reopen(). In this case, we don't 2982168404Spjd * want to post the ereport if the device was already in the 2983168404Spjd * CANT_OPEN state beforehand. 2984185029Spjd * 2985185029Spjd * If the 'checkremove' flag is set, then this is an attempt to 2986185029Spjd * online the device in response to an insertion event. If we 2987185029Spjd * hit this case, then we have detected an insertion event for a 2988185029Spjd * faulted or offline device that wasn't in the removed state. 2989185029Spjd * In this scenario, we don't post an ereport because we are 2990185029Spjd * about to replace the device, or attempt an online with 2991185029Spjd * vdev_forcefault, which will generate the fault for us. 2992168404Spjd */ 2993185029Spjd if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && 2994185029Spjd !vd->vdev_not_present && !vd->vdev_checkremove && 2995185029Spjd vd != spa->spa_root_vdev) { 2996168404Spjd const char *class; 2997168404Spjd 2998168404Spjd switch (aux) { 2999168404Spjd case VDEV_AUX_OPEN_FAILED: 3000168404Spjd class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; 3001168404Spjd break; 3002168404Spjd case VDEV_AUX_CORRUPT_DATA: 3003168404Spjd class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; 3004168404Spjd break; 3005168404Spjd case VDEV_AUX_NO_REPLICAS: 3006168404Spjd class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; 3007168404Spjd break; 3008168404Spjd case VDEV_AUX_BAD_GUID_SUM: 3009168404Spjd class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; 3010168404Spjd break; 3011168404Spjd case VDEV_AUX_TOO_SMALL: 3012168404Spjd class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; 3013168404Spjd break; 3014168404Spjd case VDEV_AUX_BAD_LABEL: 3015168404Spjd class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; 3016168404Spjd break; 3017168404Spjd default: 3018168404Spjd class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; 3019168404Spjd } 3020168404Spjd 3021185029Spjd zfs_ereport_post(class, spa, vd, NULL, save_state, 0); 3022168404Spjd } 3023185029Spjd 3024185029Spjd /* Erase any notion of persistent removed state */ 3025185029Spjd vd->vdev_removed = B_FALSE; 3026185029Spjd } else { 3027185029Spjd vd->vdev_removed = B_FALSE; 3028168404Spjd } 3029168404Spjd 3030209962Smm if (!isopen && vd->vdev_parent) 3031209962Smm vdev_propagate_state(vd->vdev_parent); 3032185029Spjd} 3033168404Spjd 3034185029Spjd/* 3035185029Spjd * Check the vdev configuration to ensure that it's capable of supporting 3036193163Sdfr * a root pool. 3037193163Sdfr * 3038193163Sdfr * On Solaris, we do not support RAID-Z or partial configuration. In 3039193163Sdfr * addition, only a single top-level vdev is allowed and none of the 3040193163Sdfr * leaves can be wholedisks. 3041193163Sdfr * 3042193163Sdfr * For FreeBSD, we can boot from any configuration. There is a 3043193163Sdfr * limitation that the boot filesystem must be either uncompressed or 3044193163Sdfr * compresses with lzjb compression but I'm not sure how to enforce 3045193163Sdfr * that here. 3046185029Spjd */ 3047185029Spjdboolean_t 3048185029Spjdvdev_is_bootable(vdev_t *vd) 3049185029Spjd{ 3050213197Smm#ifdef sun 3051185029Spjd if (!vd->vdev_ops->vdev_op_leaf) { 3052185029Spjd char *vdev_type = vd->vdev_ops->vdev_op_type; 3053185029Spjd 3054185029Spjd if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 && 3055185029Spjd vd->vdev_children > 1) { 3056185029Spjd return (B_FALSE); 3057185029Spjd } else if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 || 3058185029Spjd strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) { 3059185029Spjd return (B_FALSE); 3060185029Spjd } 3061185029Spjd } else if (vd->vdev_wholedisk == 1) { 3062185029Spjd return (B_FALSE); 3063185029Spjd } 3064185029Spjd 3065219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 3066185029Spjd if (!vdev_is_bootable(vd->vdev_child[c])) 3067185029Spjd return (B_FALSE); 3068185029Spjd } 3069213197Smm#endif /* sun */ 3070185029Spjd return (B_TRUE); 3071168404Spjd} 3072213197Smm 3073219089Spjd/* 3074219089Spjd * Load the state from the original vdev tree (ovd) which 3075219089Spjd * we've retrieved from the MOS config object. If the original 3076219089Spjd * vdev was offline or faulted then we transfer that state to the 3077219089Spjd * device in the current vdev tree (nvd). 3078219089Spjd */ 3079213197Smmvoid 3080219089Spjdvdev_load_log_state(vdev_t *nvd, vdev_t *ovd) 3081213197Smm{ 3082219089Spjd spa_t *spa = nvd->vdev_spa; 3083213197Smm 3084219089Spjd ASSERT(nvd->vdev_top->vdev_islog); 3085219089Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 3086219089Spjd ASSERT3U(nvd->vdev_guid, ==, ovd->vdev_guid); 3087213197Smm 3088219089Spjd for (int c = 0; c < nvd->vdev_children; c++) 3089219089Spjd vdev_load_log_state(nvd->vdev_child[c], ovd->vdev_child[c]); 3090213197Smm 3091219089Spjd if (nvd->vdev_ops->vdev_op_leaf) { 3092213197Smm /* 3093219089Spjd * Restore the persistent vdev state 3094213197Smm */ 3095219089Spjd nvd->vdev_offline = ovd->vdev_offline; 3096219089Spjd nvd->vdev_faulted = ovd->vdev_faulted; 3097219089Spjd nvd->vdev_degraded = ovd->vdev_degraded; 3098219089Spjd nvd->vdev_removed = ovd->vdev_removed; 3099213197Smm } 3100213197Smm} 3101219089Spjd 3102219089Spjd/* 3103219089Spjd * Determine if a log device has valid content. If the vdev was 3104219089Spjd * removed or faulted in the MOS config then we know that 3105219089Spjd * the content on the log device has already been written to the pool. 3106219089Spjd */ 3107219089Spjdboolean_t 3108219089Spjdvdev_log_state_valid(vdev_t *vd) 3109219089Spjd{ 3110219089Spjd if (vd->vdev_ops->vdev_op_leaf && !vd->vdev_faulted && 3111219089Spjd !vd->vdev_removed) 3112219089Spjd return (B_TRUE); 3113219089Spjd 3114219089Spjd for (int c = 0; c < vd->vdev_children; c++) 3115219089Spjd if (vdev_log_state_valid(vd->vdev_child[c])) 3116219089Spjd return (B_TRUE); 3117219089Spjd 3118219089Spjd return (B_FALSE); 3119219089Spjd} 3120219089Spjd 3121219089Spjd/* 3122219089Spjd * Expand a vdev if possible. 3123219089Spjd */ 3124219089Spjdvoid 3125219089Spjdvdev_expand(vdev_t *vd, uint64_t txg) 3126219089Spjd{ 3127219089Spjd ASSERT(vd->vdev_top == vd); 3128219089Spjd ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3129219089Spjd 3130219089Spjd if ((vd->vdev_asize >> vd->vdev_ms_shift) > vd->vdev_ms_count) { 3131219089Spjd VERIFY(vdev_metaslab_init(vd, txg) == 0); 3132219089Spjd vdev_config_dirty(vd); 3133219089Spjd } 3134219089Spjd} 3135219089Spjd 3136219089Spjd/* 3137219089Spjd * Split a vdev. 3138219089Spjd */ 3139219089Spjdvoid 3140219089Spjdvdev_split(vdev_t *vd) 3141219089Spjd{ 3142219089Spjd vdev_t *cvd, *pvd = vd->vdev_parent; 3143219089Spjd 3144219089Spjd vdev_remove_child(pvd, vd); 3145219089Spjd vdev_compact_children(pvd); 3146219089Spjd 3147219089Spjd cvd = pvd->vdev_child[0]; 3148219089Spjd if (pvd->vdev_children == 1) { 3149219089Spjd vdev_remove_parent(cvd); 3150219089Spjd cvd->vdev_splitting = B_TRUE; 3151219089Spjd } 3152219089Spjd vdev_propagate_state(cvd); 3153219089Spjd} 3154