vdev.c revision 247265
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. 25236155Smm * Copyright (c) 2012 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> 45240868Spjd#include <sys/trim_map.h> 46168404Spjd 47168404SpjdSYSCTL_DECL(_vfs_zfs); 48168404SpjdSYSCTL_NODE(_vfs_zfs, OID_AUTO, vdev, CTLFLAG_RW, 0, "ZFS VDEV"); 49168404Spjd 50168404Spjd/* 51168404Spjd * Virtual device management. 52168404Spjd */ 53168404Spjd 54168404Spjdstatic vdev_ops_t *vdev_ops_table[] = { 55168404Spjd &vdev_root_ops, 56168404Spjd &vdev_raidz_ops, 57168404Spjd &vdev_mirror_ops, 58168404Spjd &vdev_replacing_ops, 59168404Spjd &vdev_spare_ops, 60168404Spjd#ifdef _KERNEL 61168404Spjd &vdev_geom_ops, 62168404Spjd#else 63168404Spjd &vdev_disk_ops, 64185029Spjd#endif 65168404Spjd &vdev_file_ops, 66168404Spjd &vdev_missing_ops, 67219089Spjd &vdev_hole_ops, 68168404Spjd NULL 69168404Spjd}; 70168404Spjd 71168404Spjd 72168404Spjd/* 73168404Spjd * Given a vdev type, return the appropriate ops vector. 74168404Spjd */ 75168404Spjdstatic vdev_ops_t * 76168404Spjdvdev_getops(const char *type) 77168404Spjd{ 78168404Spjd vdev_ops_t *ops, **opspp; 79168404Spjd 80168404Spjd for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) 81168404Spjd if (strcmp(ops->vdev_op_type, type) == 0) 82168404Spjd break; 83168404Spjd 84168404Spjd return (ops); 85168404Spjd} 86168404Spjd 87168404Spjd/* 88168404Spjd * Default asize function: return the MAX of psize with the asize of 89168404Spjd * all children. This is what's used by anything other than RAID-Z. 90168404Spjd */ 91168404Spjduint64_t 92168404Spjdvdev_default_asize(vdev_t *vd, uint64_t psize) 93168404Spjd{ 94168404Spjd uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); 95168404Spjd uint64_t csize; 96168404Spjd 97219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 98168404Spjd csize = vdev_psize_to_asize(vd->vdev_child[c], psize); 99168404Spjd asize = MAX(asize, csize); 100168404Spjd } 101168404Spjd 102168404Spjd return (asize); 103168404Spjd} 104168404Spjd 105168404Spjd/* 106219089Spjd * Get the minimum allocatable size. We define the allocatable size as 107219089Spjd * the vdev's asize rounded to the nearest metaslab. This allows us to 108219089Spjd * replace or attach devices which don't have the same physical size but 109219089Spjd * can still satisfy the same number of allocations. 110168404Spjd */ 111168404Spjduint64_t 112219089Spjdvdev_get_min_asize(vdev_t *vd) 113168404Spjd{ 114219089Spjd vdev_t *pvd = vd->vdev_parent; 115168404Spjd 116219089Spjd /* 117236155Smm * If our parent is NULL (inactive spare or cache) or is the root, 118219089Spjd * just return our own asize. 119219089Spjd */ 120219089Spjd if (pvd == NULL) 121219089Spjd return (vd->vdev_asize); 122168404Spjd 123168404Spjd /* 124219089Spjd * The top-level vdev just returns the allocatable size rounded 125219089Spjd * to the nearest metaslab. 126168404Spjd */ 127219089Spjd if (vd == vd->vdev_top) 128219089Spjd return (P2ALIGN(vd->vdev_asize, 1ULL << vd->vdev_ms_shift)); 129168404Spjd 130219089Spjd /* 131219089Spjd * The allocatable space for a raidz vdev is N * sizeof(smallest child), 132219089Spjd * so each child must provide at least 1/Nth of its asize. 133219089Spjd */ 134219089Spjd if (pvd->vdev_ops == &vdev_raidz_ops) 135219089Spjd return (pvd->vdev_min_asize / pvd->vdev_children); 136168404Spjd 137219089Spjd return (pvd->vdev_min_asize); 138219089Spjd} 139168404Spjd 140219089Spjdvoid 141219089Spjdvdev_set_min_asize(vdev_t *vd) 142219089Spjd{ 143219089Spjd vd->vdev_min_asize = vdev_get_min_asize(vd); 144219089Spjd 145219089Spjd for (int c = 0; c < vd->vdev_children; c++) 146219089Spjd vdev_set_min_asize(vd->vdev_child[c]); 147168404Spjd} 148168404Spjd 149168404Spjdvdev_t * 150168404Spjdvdev_lookup_top(spa_t *spa, uint64_t vdev) 151168404Spjd{ 152168404Spjd vdev_t *rvd = spa->spa_root_vdev; 153168404Spjd 154185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 155185029Spjd 156185029Spjd if (vdev < rvd->vdev_children) { 157185029Spjd ASSERT(rvd->vdev_child[vdev] != NULL); 158168404Spjd return (rvd->vdev_child[vdev]); 159185029Spjd } 160168404Spjd 161168404Spjd return (NULL); 162168404Spjd} 163168404Spjd 164168404Spjdvdev_t * 165168404Spjdvdev_lookup_by_guid(vdev_t *vd, uint64_t guid) 166168404Spjd{ 167168404Spjd vdev_t *mvd; 168168404Spjd 169168404Spjd if (vd->vdev_guid == guid) 170168404Spjd return (vd); 171168404Spjd 172219089Spjd for (int c = 0; c < vd->vdev_children; c++) 173168404Spjd if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != 174168404Spjd NULL) 175168404Spjd return (mvd); 176168404Spjd 177168404Spjd return (NULL); 178168404Spjd} 179168404Spjd 180168404Spjdvoid 181168404Spjdvdev_add_child(vdev_t *pvd, vdev_t *cvd) 182168404Spjd{ 183168404Spjd size_t oldsize, newsize; 184168404Spjd uint64_t id = cvd->vdev_id; 185168404Spjd vdev_t **newchild; 186168404Spjd 187185029Spjd ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 188168404Spjd ASSERT(cvd->vdev_parent == NULL); 189168404Spjd 190168404Spjd cvd->vdev_parent = pvd; 191168404Spjd 192168404Spjd if (pvd == NULL) 193168404Spjd return; 194168404Spjd 195168404Spjd ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); 196168404Spjd 197168404Spjd oldsize = pvd->vdev_children * sizeof (vdev_t *); 198168404Spjd pvd->vdev_children = MAX(pvd->vdev_children, id + 1); 199168404Spjd newsize = pvd->vdev_children * sizeof (vdev_t *); 200168404Spjd 201168404Spjd newchild = kmem_zalloc(newsize, KM_SLEEP); 202168404Spjd if (pvd->vdev_child != NULL) { 203168404Spjd bcopy(pvd->vdev_child, newchild, oldsize); 204168404Spjd kmem_free(pvd->vdev_child, oldsize); 205168404Spjd } 206168404Spjd 207168404Spjd pvd->vdev_child = newchild; 208168404Spjd pvd->vdev_child[id] = cvd; 209168404Spjd 210168404Spjd cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); 211168404Spjd ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); 212168404Spjd 213168404Spjd /* 214168404Spjd * Walk up all ancestors to update guid sum. 215168404Spjd */ 216168404Spjd for (; pvd != NULL; pvd = pvd->vdev_parent) 217168404Spjd pvd->vdev_guid_sum += cvd->vdev_guid_sum; 218168404Spjd} 219168404Spjd 220168404Spjdvoid 221168404Spjdvdev_remove_child(vdev_t *pvd, vdev_t *cvd) 222168404Spjd{ 223168404Spjd int c; 224168404Spjd uint_t id = cvd->vdev_id; 225168404Spjd 226168404Spjd ASSERT(cvd->vdev_parent == pvd); 227168404Spjd 228168404Spjd if (pvd == NULL) 229168404Spjd return; 230168404Spjd 231168404Spjd ASSERT(id < pvd->vdev_children); 232168404Spjd ASSERT(pvd->vdev_child[id] == cvd); 233168404Spjd 234168404Spjd pvd->vdev_child[id] = NULL; 235168404Spjd cvd->vdev_parent = NULL; 236168404Spjd 237168404Spjd for (c = 0; c < pvd->vdev_children; c++) 238168404Spjd if (pvd->vdev_child[c]) 239168404Spjd break; 240168404Spjd 241168404Spjd if (c == pvd->vdev_children) { 242168404Spjd kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); 243168404Spjd pvd->vdev_child = NULL; 244168404Spjd pvd->vdev_children = 0; 245168404Spjd } 246168404Spjd 247168404Spjd /* 248168404Spjd * Walk up all ancestors to update guid sum. 249168404Spjd */ 250168404Spjd for (; pvd != NULL; pvd = pvd->vdev_parent) 251168404Spjd pvd->vdev_guid_sum -= cvd->vdev_guid_sum; 252168404Spjd} 253168404Spjd 254168404Spjd/* 255168404Spjd * Remove any holes in the child array. 256168404Spjd */ 257168404Spjdvoid 258168404Spjdvdev_compact_children(vdev_t *pvd) 259168404Spjd{ 260168404Spjd vdev_t **newchild, *cvd; 261168404Spjd int oldc = pvd->vdev_children; 262219089Spjd int newc; 263168404Spjd 264185029Spjd ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 265168404Spjd 266219089Spjd for (int c = newc = 0; c < oldc; c++) 267168404Spjd if (pvd->vdev_child[c]) 268168404Spjd newc++; 269168404Spjd 270168404Spjd newchild = kmem_alloc(newc * sizeof (vdev_t *), KM_SLEEP); 271168404Spjd 272219089Spjd for (int c = newc = 0; c < oldc; c++) { 273168404Spjd if ((cvd = pvd->vdev_child[c]) != NULL) { 274168404Spjd newchild[newc] = cvd; 275168404Spjd cvd->vdev_id = newc++; 276168404Spjd } 277168404Spjd } 278168404Spjd 279168404Spjd kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); 280168404Spjd pvd->vdev_child = newchild; 281168404Spjd pvd->vdev_children = newc; 282168404Spjd} 283168404Spjd 284168404Spjd/* 285168404Spjd * Allocate and minimally initialize a vdev_t. 286168404Spjd */ 287219089Spjdvdev_t * 288168404Spjdvdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) 289168404Spjd{ 290168404Spjd vdev_t *vd; 291168404Spjd 292168404Spjd vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP); 293168404Spjd 294168404Spjd if (spa->spa_root_vdev == NULL) { 295168404Spjd ASSERT(ops == &vdev_root_ops); 296168404Spjd spa->spa_root_vdev = vd; 297228103Smm spa->spa_load_guid = spa_generate_guid(NULL); 298168404Spjd } 299168404Spjd 300219089Spjd if (guid == 0 && ops != &vdev_hole_ops) { 301168404Spjd if (spa->spa_root_vdev == vd) { 302168404Spjd /* 303168404Spjd * The root vdev's guid will also be the pool guid, 304168404Spjd * which must be unique among all pools. 305168404Spjd */ 306219089Spjd guid = spa_generate_guid(NULL); 307168404Spjd } else { 308168404Spjd /* 309168404Spjd * Any other vdev's guid must be unique within the pool. 310168404Spjd */ 311219089Spjd guid = spa_generate_guid(spa); 312168404Spjd } 313168404Spjd ASSERT(!spa_guid_exists(spa_guid(spa), guid)); 314168404Spjd } 315168404Spjd 316168404Spjd vd->vdev_spa = spa; 317168404Spjd vd->vdev_id = id; 318168404Spjd vd->vdev_guid = guid; 319168404Spjd vd->vdev_guid_sum = guid; 320168404Spjd vd->vdev_ops = ops; 321168404Spjd vd->vdev_state = VDEV_STATE_CLOSED; 322219089Spjd vd->vdev_ishole = (ops == &vdev_hole_ops); 323168404Spjd 324168404Spjd mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_DEFAULT, NULL); 325168404Spjd mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); 326185029Spjd mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL); 327209962Smm for (int t = 0; t < DTL_TYPES; t++) { 328209962Smm space_map_create(&vd->vdev_dtl[t], 0, -1ULL, 0, 329209962Smm &vd->vdev_dtl_lock); 330209962Smm } 331168404Spjd txg_list_create(&vd->vdev_ms_list, 332168404Spjd offsetof(struct metaslab, ms_txg_node)); 333168404Spjd txg_list_create(&vd->vdev_dtl_list, 334168404Spjd offsetof(struct vdev, vdev_dtl_node)); 335168404Spjd vd->vdev_stat.vs_timestamp = gethrtime(); 336185029Spjd vdev_queue_init(vd); 337185029Spjd vdev_cache_init(vd); 338168404Spjd 339168404Spjd return (vd); 340168404Spjd} 341168404Spjd 342168404Spjd/* 343168404Spjd * Allocate a new vdev. The 'alloctype' is used to control whether we are 344168404Spjd * creating a new vdev or loading an existing one - the behavior is slightly 345168404Spjd * different for each case. 346168404Spjd */ 347168404Spjdint 348168404Spjdvdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, 349168404Spjd int alloctype) 350168404Spjd{ 351168404Spjd vdev_ops_t *ops; 352168404Spjd char *type; 353185029Spjd uint64_t guid = 0, islog, nparity; 354168404Spjd vdev_t *vd; 355168404Spjd 356185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 357168404Spjd 358168404Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) 359168404Spjd return (EINVAL); 360168404Spjd 361168404Spjd if ((ops = vdev_getops(type)) == NULL) 362168404Spjd return (EINVAL); 363168404Spjd 364168404Spjd /* 365168404Spjd * If this is a load, get the vdev guid from the nvlist. 366168404Spjd * Otherwise, vdev_alloc_common() will generate one for us. 367168404Spjd */ 368168404Spjd if (alloctype == VDEV_ALLOC_LOAD) { 369168404Spjd uint64_t label_id; 370168404Spjd 371168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || 372168404Spjd label_id != id) 373168404Spjd return (EINVAL); 374168404Spjd 375168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 376168404Spjd return (EINVAL); 377168404Spjd } else if (alloctype == VDEV_ALLOC_SPARE) { 378168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 379168404Spjd return (EINVAL); 380185029Spjd } else if (alloctype == VDEV_ALLOC_L2CACHE) { 381185029Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 382185029Spjd return (EINVAL); 383219089Spjd } else if (alloctype == VDEV_ALLOC_ROOTPOOL) { 384219089Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 385219089Spjd return (EINVAL); 386168404Spjd } 387168404Spjd 388168404Spjd /* 389168404Spjd * The first allocated vdev must be of type 'root'. 390168404Spjd */ 391168404Spjd if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) 392168404Spjd return (EINVAL); 393168404Spjd 394185029Spjd /* 395185029Spjd * Determine whether we're a log vdev. 396185029Spjd */ 397185029Spjd islog = 0; 398185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); 399185029Spjd if (islog && spa_version(spa) < SPA_VERSION_SLOGS) 400185029Spjd return (ENOTSUP); 401168404Spjd 402219089Spjd if (ops == &vdev_hole_ops && spa_version(spa) < SPA_VERSION_HOLES) 403219089Spjd return (ENOTSUP); 404219089Spjd 405168404Spjd /* 406185029Spjd * Set the nparity property for RAID-Z vdevs. 407168404Spjd */ 408185029Spjd nparity = -1ULL; 409168404Spjd if (ops == &vdev_raidz_ops) { 410168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, 411185029Spjd &nparity) == 0) { 412219089Spjd if (nparity == 0 || nparity > VDEV_RAIDZ_MAXPARITY) 413168404Spjd return (EINVAL); 414168404Spjd /* 415219089Spjd * Previous versions could only support 1 or 2 parity 416219089Spjd * device. 417168404Spjd */ 418219089Spjd if (nparity > 1 && 419219089Spjd spa_version(spa) < SPA_VERSION_RAIDZ2) 420168404Spjd return (ENOTSUP); 421219089Spjd if (nparity > 2 && 422219089Spjd spa_version(spa) < SPA_VERSION_RAIDZ3) 423219089Spjd return (ENOTSUP); 424168404Spjd } else { 425168404Spjd /* 426168404Spjd * We require the parity to be specified for SPAs that 427168404Spjd * support multiple parity levels. 428168404Spjd */ 429219089Spjd if (spa_version(spa) >= SPA_VERSION_RAIDZ2) 430168404Spjd return (EINVAL); 431168404Spjd /* 432168404Spjd * Otherwise, we default to 1 parity device for RAID-Z. 433168404Spjd */ 434185029Spjd nparity = 1; 435168404Spjd } 436168404Spjd } else { 437185029Spjd nparity = 0; 438168404Spjd } 439185029Spjd ASSERT(nparity != -1ULL); 440168404Spjd 441185029Spjd vd = vdev_alloc_common(spa, id, guid, ops); 442185029Spjd 443185029Spjd vd->vdev_islog = islog; 444185029Spjd vd->vdev_nparity = nparity; 445185029Spjd 446185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) 447185029Spjd vd->vdev_path = spa_strdup(vd->vdev_path); 448185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) 449185029Spjd vd->vdev_devid = spa_strdup(vd->vdev_devid); 450185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, 451185029Spjd &vd->vdev_physpath) == 0) 452185029Spjd vd->vdev_physpath = spa_strdup(vd->vdev_physpath); 453209962Smm if (nvlist_lookup_string(nv, ZPOOL_CONFIG_FRU, &vd->vdev_fru) == 0) 454209962Smm vd->vdev_fru = spa_strdup(vd->vdev_fru); 455185029Spjd 456168404Spjd /* 457168404Spjd * Set the whole_disk property. If it's not specified, leave the value 458168404Spjd * as -1. 459168404Spjd */ 460168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, 461168404Spjd &vd->vdev_wholedisk) != 0) 462168404Spjd vd->vdev_wholedisk = -1ULL; 463168404Spjd 464168404Spjd /* 465168404Spjd * Look for the 'not present' flag. This will only be set if the device 466168404Spjd * was not present at the time of import. 467168404Spjd */ 468209962Smm (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, 469209962Smm &vd->vdev_not_present); 470168404Spjd 471168404Spjd /* 472168404Spjd * Get the alignment requirement. 473168404Spjd */ 474168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); 475168404Spjd 476168404Spjd /* 477219089Spjd * Retrieve the vdev creation time. 478219089Spjd */ 479219089Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_CREATE_TXG, 480219089Spjd &vd->vdev_crtxg); 481219089Spjd 482219089Spjd /* 483168404Spjd * If we're a top-level vdev, try to load the allocation parameters. 484168404Spjd */ 485219089Spjd if (parent && !parent->vdev_parent && 486219089Spjd (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) { 487168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, 488168404Spjd &vd->vdev_ms_array); 489168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, 490168404Spjd &vd->vdev_ms_shift); 491168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, 492168404Spjd &vd->vdev_asize); 493219089Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVING, 494219089Spjd &vd->vdev_removing); 495168404Spjd } 496168404Spjd 497230514Smm if (parent && !parent->vdev_parent && alloctype != VDEV_ALLOC_ATTACH) { 498219089Spjd ASSERT(alloctype == VDEV_ALLOC_LOAD || 499219089Spjd alloctype == VDEV_ALLOC_ADD || 500219089Spjd alloctype == VDEV_ALLOC_SPLIT || 501219089Spjd alloctype == VDEV_ALLOC_ROOTPOOL); 502219089Spjd vd->vdev_mg = metaslab_group_create(islog ? 503219089Spjd spa_log_class(spa) : spa_normal_class(spa), vd); 504219089Spjd } 505219089Spjd 506168404Spjd /* 507185029Spjd * If we're a leaf vdev, try to load the DTL object and other state. 508168404Spjd */ 509185029Spjd if (vd->vdev_ops->vdev_op_leaf && 510219089Spjd (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE || 511219089Spjd alloctype == VDEV_ALLOC_ROOTPOOL)) { 512185029Spjd if (alloctype == VDEV_ALLOC_LOAD) { 513185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, 514209962Smm &vd->vdev_dtl_smo.smo_object); 515185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, 516185029Spjd &vd->vdev_unspare); 517185029Spjd } 518219089Spjd 519219089Spjd if (alloctype == VDEV_ALLOC_ROOTPOOL) { 520219089Spjd uint64_t spare = 0; 521219089Spjd 522219089Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE, 523219089Spjd &spare) == 0 && spare) 524219089Spjd spa_spare_add(vd); 525219089Spjd } 526219089Spjd 527168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, 528168404Spjd &vd->vdev_offline); 529185029Spjd 530219089Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_RESILVERING, 531219089Spjd &vd->vdev_resilvering); 532219089Spjd 533185029Spjd /* 534185029Spjd * When importing a pool, we want to ignore the persistent fault 535185029Spjd * state, as the diagnosis made on another system may not be 536219089Spjd * valid in the current context. Local vdevs will 537219089Spjd * remain in the faulted state. 538185029Spjd */ 539219089Spjd if (spa_load_state(spa) == SPA_LOAD_OPEN) { 540185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, 541185029Spjd &vd->vdev_faulted); 542185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, 543185029Spjd &vd->vdev_degraded); 544185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, 545185029Spjd &vd->vdev_removed); 546219089Spjd 547219089Spjd if (vd->vdev_faulted || vd->vdev_degraded) { 548219089Spjd char *aux; 549219089Spjd 550219089Spjd vd->vdev_label_aux = 551219089Spjd VDEV_AUX_ERR_EXCEEDED; 552219089Spjd if (nvlist_lookup_string(nv, 553219089Spjd ZPOOL_CONFIG_AUX_STATE, &aux) == 0 && 554219089Spjd strcmp(aux, "external") == 0) 555219089Spjd vd->vdev_label_aux = VDEV_AUX_EXTERNAL; 556219089Spjd } 557185029Spjd } 558168404Spjd } 559168404Spjd 560168404Spjd /* 561168404Spjd * Add ourselves to the parent's list of children. 562168404Spjd */ 563168404Spjd vdev_add_child(parent, vd); 564168404Spjd 565168404Spjd *vdp = vd; 566168404Spjd 567168404Spjd return (0); 568168404Spjd} 569168404Spjd 570168404Spjdvoid 571168404Spjdvdev_free(vdev_t *vd) 572168404Spjd{ 573185029Spjd spa_t *spa = vd->vdev_spa; 574168404Spjd 575168404Spjd /* 576168404Spjd * vdev_free() implies closing the vdev first. This is simpler than 577168404Spjd * trying to ensure complicated semantics for all callers. 578168404Spjd */ 579168404Spjd vdev_close(vd); 580168404Spjd 581185029Spjd ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); 582219089Spjd ASSERT(!list_link_active(&vd->vdev_state_dirty_node)); 583168404Spjd 584168404Spjd /* 585168404Spjd * Free all children. 586168404Spjd */ 587219089Spjd for (int c = 0; c < vd->vdev_children; c++) 588168404Spjd vdev_free(vd->vdev_child[c]); 589168404Spjd 590168404Spjd ASSERT(vd->vdev_child == NULL); 591168404Spjd ASSERT(vd->vdev_guid_sum == vd->vdev_guid); 592168404Spjd 593168404Spjd /* 594168404Spjd * Discard allocation state. 595168404Spjd */ 596219089Spjd if (vd->vdev_mg != NULL) { 597168404Spjd vdev_metaslab_fini(vd); 598219089Spjd metaslab_group_destroy(vd->vdev_mg); 599219089Spjd } 600168404Spjd 601240415Smm ASSERT0(vd->vdev_stat.vs_space); 602240415Smm ASSERT0(vd->vdev_stat.vs_dspace); 603240415Smm ASSERT0(vd->vdev_stat.vs_alloc); 604168404Spjd 605168404Spjd /* 606168404Spjd * Remove this vdev from its parent's child list. 607168404Spjd */ 608168404Spjd vdev_remove_child(vd->vdev_parent, vd); 609168404Spjd 610168404Spjd ASSERT(vd->vdev_parent == NULL); 611168404Spjd 612185029Spjd /* 613185029Spjd * Clean up vdev structure. 614185029Spjd */ 615185029Spjd vdev_queue_fini(vd); 616185029Spjd vdev_cache_fini(vd); 617185029Spjd 618185029Spjd if (vd->vdev_path) 619185029Spjd spa_strfree(vd->vdev_path); 620185029Spjd if (vd->vdev_devid) 621185029Spjd spa_strfree(vd->vdev_devid); 622185029Spjd if (vd->vdev_physpath) 623185029Spjd spa_strfree(vd->vdev_physpath); 624209962Smm if (vd->vdev_fru) 625209962Smm spa_strfree(vd->vdev_fru); 626185029Spjd 627185029Spjd if (vd->vdev_isspare) 628185029Spjd spa_spare_remove(vd); 629185029Spjd if (vd->vdev_isl2cache) 630185029Spjd spa_l2cache_remove(vd); 631185029Spjd 632185029Spjd txg_list_destroy(&vd->vdev_ms_list); 633185029Spjd txg_list_destroy(&vd->vdev_dtl_list); 634209962Smm 635185029Spjd mutex_enter(&vd->vdev_dtl_lock); 636209962Smm for (int t = 0; t < DTL_TYPES; t++) { 637209962Smm space_map_unload(&vd->vdev_dtl[t]); 638209962Smm space_map_destroy(&vd->vdev_dtl[t]); 639209962Smm } 640185029Spjd mutex_exit(&vd->vdev_dtl_lock); 641209962Smm 642185029Spjd mutex_destroy(&vd->vdev_dtl_lock); 643185029Spjd mutex_destroy(&vd->vdev_stat_lock); 644185029Spjd mutex_destroy(&vd->vdev_probe_lock); 645185029Spjd 646185029Spjd if (vd == spa->spa_root_vdev) 647185029Spjd spa->spa_root_vdev = NULL; 648185029Spjd 649185029Spjd kmem_free(vd, sizeof (vdev_t)); 650168404Spjd} 651168404Spjd 652168404Spjd/* 653168404Spjd * Transfer top-level vdev state from svd to tvd. 654168404Spjd */ 655168404Spjdstatic void 656168404Spjdvdev_top_transfer(vdev_t *svd, vdev_t *tvd) 657168404Spjd{ 658168404Spjd spa_t *spa = svd->vdev_spa; 659168404Spjd metaslab_t *msp; 660168404Spjd vdev_t *vd; 661168404Spjd int t; 662168404Spjd 663168404Spjd ASSERT(tvd == tvd->vdev_top); 664168404Spjd 665168404Spjd tvd->vdev_ms_array = svd->vdev_ms_array; 666168404Spjd tvd->vdev_ms_shift = svd->vdev_ms_shift; 667168404Spjd tvd->vdev_ms_count = svd->vdev_ms_count; 668168404Spjd 669168404Spjd svd->vdev_ms_array = 0; 670168404Spjd svd->vdev_ms_shift = 0; 671168404Spjd svd->vdev_ms_count = 0; 672168404Spjd 673230514Smm if (tvd->vdev_mg) 674230514Smm ASSERT3P(tvd->vdev_mg, ==, svd->vdev_mg); 675168404Spjd tvd->vdev_mg = svd->vdev_mg; 676168404Spjd tvd->vdev_ms = svd->vdev_ms; 677168404Spjd 678168404Spjd svd->vdev_mg = NULL; 679168404Spjd svd->vdev_ms = NULL; 680168404Spjd 681168404Spjd if (tvd->vdev_mg != NULL) 682168404Spjd tvd->vdev_mg->mg_vd = tvd; 683168404Spjd 684168404Spjd tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; 685168404Spjd tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; 686168404Spjd tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; 687168404Spjd 688168404Spjd svd->vdev_stat.vs_alloc = 0; 689168404Spjd svd->vdev_stat.vs_space = 0; 690168404Spjd svd->vdev_stat.vs_dspace = 0; 691168404Spjd 692168404Spjd for (t = 0; t < TXG_SIZE; t++) { 693168404Spjd while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) 694168404Spjd (void) txg_list_add(&tvd->vdev_ms_list, msp, t); 695168404Spjd while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) 696168404Spjd (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); 697168404Spjd if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) 698168404Spjd (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); 699168404Spjd } 700168404Spjd 701185029Spjd if (list_link_active(&svd->vdev_config_dirty_node)) { 702168404Spjd vdev_config_clean(svd); 703168404Spjd vdev_config_dirty(tvd); 704168404Spjd } 705168404Spjd 706185029Spjd if (list_link_active(&svd->vdev_state_dirty_node)) { 707185029Spjd vdev_state_clean(svd); 708185029Spjd vdev_state_dirty(tvd); 709185029Spjd } 710168404Spjd 711168404Spjd tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; 712168404Spjd svd->vdev_deflate_ratio = 0; 713185029Spjd 714185029Spjd tvd->vdev_islog = svd->vdev_islog; 715185029Spjd svd->vdev_islog = 0; 716168404Spjd} 717168404Spjd 718168404Spjdstatic void 719168404Spjdvdev_top_update(vdev_t *tvd, vdev_t *vd) 720168404Spjd{ 721168404Spjd if (vd == NULL) 722168404Spjd return; 723168404Spjd 724168404Spjd vd->vdev_top = tvd; 725168404Spjd 726219089Spjd for (int c = 0; c < vd->vdev_children; c++) 727168404Spjd vdev_top_update(tvd, vd->vdev_child[c]); 728168404Spjd} 729168404Spjd 730168404Spjd/* 731168404Spjd * Add a mirror/replacing vdev above an existing vdev. 732168404Spjd */ 733168404Spjdvdev_t * 734168404Spjdvdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) 735168404Spjd{ 736168404Spjd spa_t *spa = cvd->vdev_spa; 737168404Spjd vdev_t *pvd = cvd->vdev_parent; 738168404Spjd vdev_t *mvd; 739168404Spjd 740185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 741168404Spjd 742168404Spjd mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); 743168404Spjd 744168404Spjd mvd->vdev_asize = cvd->vdev_asize; 745219089Spjd mvd->vdev_min_asize = cvd->vdev_min_asize; 746236155Smm mvd->vdev_max_asize = cvd->vdev_max_asize; 747168404Spjd mvd->vdev_ashift = cvd->vdev_ashift; 748168404Spjd mvd->vdev_state = cvd->vdev_state; 749219089Spjd mvd->vdev_crtxg = cvd->vdev_crtxg; 750168404Spjd 751168404Spjd vdev_remove_child(pvd, cvd); 752168404Spjd vdev_add_child(pvd, mvd); 753168404Spjd cvd->vdev_id = mvd->vdev_children; 754168404Spjd vdev_add_child(mvd, cvd); 755168404Spjd vdev_top_update(cvd->vdev_top, cvd->vdev_top); 756168404Spjd 757168404Spjd if (mvd == mvd->vdev_top) 758168404Spjd vdev_top_transfer(cvd, mvd); 759168404Spjd 760168404Spjd return (mvd); 761168404Spjd} 762168404Spjd 763168404Spjd/* 764168404Spjd * Remove a 1-way mirror/replacing vdev from the tree. 765168404Spjd */ 766168404Spjdvoid 767168404Spjdvdev_remove_parent(vdev_t *cvd) 768168404Spjd{ 769168404Spjd vdev_t *mvd = cvd->vdev_parent; 770168404Spjd vdev_t *pvd = mvd->vdev_parent; 771168404Spjd 772185029Spjd ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 773168404Spjd 774168404Spjd ASSERT(mvd->vdev_children == 1); 775168404Spjd ASSERT(mvd->vdev_ops == &vdev_mirror_ops || 776168404Spjd mvd->vdev_ops == &vdev_replacing_ops || 777168404Spjd mvd->vdev_ops == &vdev_spare_ops); 778168404Spjd cvd->vdev_ashift = mvd->vdev_ashift; 779168404Spjd 780168404Spjd vdev_remove_child(mvd, cvd); 781168404Spjd vdev_remove_child(pvd, mvd); 782209962Smm 783185029Spjd /* 784185029Spjd * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. 785185029Spjd * Otherwise, we could have detached an offline device, and when we 786185029Spjd * go to import the pool we'll think we have two top-level vdevs, 787185029Spjd * instead of a different version of the same top-level vdev. 788185029Spjd */ 789209962Smm if (mvd->vdev_top == mvd) { 790209962Smm uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid; 791219089Spjd cvd->vdev_orig_guid = cvd->vdev_guid; 792209962Smm cvd->vdev_guid += guid_delta; 793209962Smm cvd->vdev_guid_sum += guid_delta; 794209962Smm } 795168404Spjd cvd->vdev_id = mvd->vdev_id; 796168404Spjd vdev_add_child(pvd, cvd); 797168404Spjd vdev_top_update(cvd->vdev_top, cvd->vdev_top); 798168404Spjd 799168404Spjd if (cvd == cvd->vdev_top) 800168404Spjd vdev_top_transfer(mvd, cvd); 801168404Spjd 802168404Spjd ASSERT(mvd->vdev_children == 0); 803168404Spjd vdev_free(mvd); 804168404Spjd} 805168404Spjd 806168404Spjdint 807168404Spjdvdev_metaslab_init(vdev_t *vd, uint64_t txg) 808168404Spjd{ 809168404Spjd spa_t *spa = vd->vdev_spa; 810168404Spjd objset_t *mos = spa->spa_meta_objset; 811168404Spjd uint64_t m; 812168404Spjd uint64_t oldc = vd->vdev_ms_count; 813168404Spjd uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; 814168404Spjd metaslab_t **mspp; 815168404Spjd int error; 816168404Spjd 817219089Spjd ASSERT(txg == 0 || spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 818219089Spjd 819219089Spjd /* 820219089Spjd * This vdev is not being allocated from yet or is a hole. 821219089Spjd */ 822219089Spjd if (vd->vdev_ms_shift == 0) 823168404Spjd return (0); 824168404Spjd 825219089Spjd ASSERT(!vd->vdev_ishole); 826219089Spjd 827213197Smm /* 828213197Smm * Compute the raidz-deflation ratio. Note, we hard-code 829213197Smm * in 128k (1 << 17) because it is the current "typical" blocksize. 830213197Smm * Even if SPA_MAXBLOCKSIZE changes, this algorithm must never change, 831213197Smm * or we will inconsistently account for existing bp's. 832213197Smm */ 833213197Smm vd->vdev_deflate_ratio = (1 << 17) / 834213197Smm (vdev_psize_to_asize(vd, 1 << 17) >> SPA_MINBLOCKSHIFT); 835213197Smm 836168404Spjd ASSERT(oldc <= newc); 837168404Spjd 838168404Spjd mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); 839168404Spjd 840168404Spjd if (oldc != 0) { 841168404Spjd bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); 842168404Spjd kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); 843168404Spjd } 844168404Spjd 845168404Spjd vd->vdev_ms = mspp; 846168404Spjd vd->vdev_ms_count = newc; 847168404Spjd 848168404Spjd for (m = oldc; m < newc; m++) { 849168404Spjd space_map_obj_t smo = { 0, 0, 0 }; 850168404Spjd if (txg == 0) { 851168404Spjd uint64_t object = 0; 852168404Spjd error = dmu_read(mos, vd->vdev_ms_array, 853209962Smm m * sizeof (uint64_t), sizeof (uint64_t), &object, 854209962Smm DMU_READ_PREFETCH); 855168404Spjd if (error) 856168404Spjd return (error); 857168404Spjd if (object != 0) { 858168404Spjd dmu_buf_t *db; 859168404Spjd error = dmu_bonus_hold(mos, object, FTAG, &db); 860168404Spjd if (error) 861168404Spjd return (error); 862185029Spjd ASSERT3U(db->db_size, >=, sizeof (smo)); 863185029Spjd bcopy(db->db_data, &smo, sizeof (smo)); 864168404Spjd ASSERT3U(smo.smo_object, ==, object); 865168404Spjd dmu_buf_rele(db, FTAG); 866168404Spjd } 867168404Spjd } 868168404Spjd vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, 869168404Spjd m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); 870168404Spjd } 871168404Spjd 872219089Spjd if (txg == 0) 873219089Spjd spa_config_enter(spa, SCL_ALLOC, FTAG, RW_WRITER); 874219089Spjd 875219089Spjd /* 876219089Spjd * If the vdev is being removed we don't activate 877219089Spjd * the metaslabs since we want to ensure that no new 878219089Spjd * allocations are performed on this device. 879219089Spjd */ 880219089Spjd if (oldc == 0 && !vd->vdev_removing) 881219089Spjd metaslab_group_activate(vd->vdev_mg); 882219089Spjd 883219089Spjd if (txg == 0) 884219089Spjd spa_config_exit(spa, SCL_ALLOC, FTAG); 885219089Spjd 886168404Spjd return (0); 887168404Spjd} 888168404Spjd 889168404Spjdvoid 890168404Spjdvdev_metaslab_fini(vdev_t *vd) 891168404Spjd{ 892168404Spjd uint64_t m; 893168404Spjd uint64_t count = vd->vdev_ms_count; 894168404Spjd 895168404Spjd if (vd->vdev_ms != NULL) { 896219089Spjd metaslab_group_passivate(vd->vdev_mg); 897168404Spjd for (m = 0; m < count; m++) 898168404Spjd if (vd->vdev_ms[m] != NULL) 899168404Spjd metaslab_fini(vd->vdev_ms[m]); 900168404Spjd kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); 901168404Spjd vd->vdev_ms = NULL; 902168404Spjd } 903168404Spjd} 904168404Spjd 905185029Spjdtypedef struct vdev_probe_stats { 906185029Spjd boolean_t vps_readable; 907185029Spjd boolean_t vps_writeable; 908185029Spjd int vps_flags; 909185029Spjd} vdev_probe_stats_t; 910185029Spjd 911185029Spjdstatic void 912185029Spjdvdev_probe_done(zio_t *zio) 913185029Spjd{ 914209962Smm spa_t *spa = zio->io_spa; 915209962Smm vdev_t *vd = zio->io_vd; 916185029Spjd vdev_probe_stats_t *vps = zio->io_private; 917185029Spjd 918209962Smm ASSERT(vd->vdev_probe_zio != NULL); 919209962Smm 920185029Spjd if (zio->io_type == ZIO_TYPE_READ) { 921185029Spjd if (zio->io_error == 0) 922185029Spjd vps->vps_readable = 1; 923209962Smm if (zio->io_error == 0 && spa_writeable(spa)) { 924209962Smm zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd, 925185029Spjd zio->io_offset, zio->io_size, zio->io_data, 926185029Spjd ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 927185029Spjd ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); 928185029Spjd } else { 929185029Spjd zio_buf_free(zio->io_data, zio->io_size); 930185029Spjd } 931185029Spjd } else if (zio->io_type == ZIO_TYPE_WRITE) { 932185029Spjd if (zio->io_error == 0) 933185029Spjd vps->vps_writeable = 1; 934185029Spjd zio_buf_free(zio->io_data, zio->io_size); 935185029Spjd } else if (zio->io_type == ZIO_TYPE_NULL) { 936209962Smm zio_t *pio; 937185029Spjd 938185029Spjd vd->vdev_cant_read |= !vps->vps_readable; 939185029Spjd vd->vdev_cant_write |= !vps->vps_writeable; 940185029Spjd 941185029Spjd if (vdev_readable(vd) && 942209962Smm (vdev_writeable(vd) || !spa_writeable(spa))) { 943185029Spjd zio->io_error = 0; 944185029Spjd } else { 945185029Spjd ASSERT(zio->io_error != 0); 946185029Spjd zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE, 947209962Smm spa, vd, NULL, 0, 0); 948185029Spjd zio->io_error = ENXIO; 949185029Spjd } 950209962Smm 951209962Smm mutex_enter(&vd->vdev_probe_lock); 952209962Smm ASSERT(vd->vdev_probe_zio == zio); 953209962Smm vd->vdev_probe_zio = NULL; 954209962Smm mutex_exit(&vd->vdev_probe_lock); 955209962Smm 956209962Smm while ((pio = zio_walk_parents(zio)) != NULL) 957209962Smm if (!vdev_accessible(vd, pio)) 958209962Smm pio->io_error = ENXIO; 959209962Smm 960185029Spjd kmem_free(vps, sizeof (*vps)); 961185029Spjd } 962185029Spjd} 963185029Spjd 964168404Spjd/* 965185029Spjd * Determine whether this device is accessible by reading and writing 966185029Spjd * to several known locations: the pad regions of each vdev label 967185029Spjd * but the first (which we leave alone in case it contains a VTOC). 968185029Spjd */ 969185029Spjdzio_t * 970209962Smmvdev_probe(vdev_t *vd, zio_t *zio) 971185029Spjd{ 972185029Spjd spa_t *spa = vd->vdev_spa; 973209962Smm vdev_probe_stats_t *vps = NULL; 974209962Smm zio_t *pio; 975185029Spjd 976209962Smm ASSERT(vd->vdev_ops->vdev_op_leaf); 977185029Spjd 978209962Smm /* 979209962Smm * Don't probe the probe. 980209962Smm */ 981209962Smm if (zio && (zio->io_flags & ZIO_FLAG_PROBE)) 982209962Smm return (NULL); 983185029Spjd 984209962Smm /* 985209962Smm * To prevent 'probe storms' when a device fails, we create 986209962Smm * just one probe i/o at a time. All zios that want to probe 987209962Smm * this vdev will become parents of the probe io. 988209962Smm */ 989209962Smm mutex_enter(&vd->vdev_probe_lock); 990209962Smm 991209962Smm if ((pio = vd->vdev_probe_zio) == NULL) { 992209962Smm vps = kmem_zalloc(sizeof (*vps), KM_SLEEP); 993209962Smm 994209962Smm vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | 995209962Smm ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | 996213198Smm ZIO_FLAG_TRYHARD; 997209962Smm 998209962Smm if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { 999209962Smm /* 1000209962Smm * vdev_cant_read and vdev_cant_write can only 1001209962Smm * transition from TRUE to FALSE when we have the 1002209962Smm * SCL_ZIO lock as writer; otherwise they can only 1003209962Smm * transition from FALSE to TRUE. This ensures that 1004209962Smm * any zio looking at these values can assume that 1005209962Smm * failures persist for the life of the I/O. That's 1006209962Smm * important because when a device has intermittent 1007209962Smm * connectivity problems, we want to ensure that 1008209962Smm * they're ascribed to the device (ENXIO) and not 1009209962Smm * the zio (EIO). 1010209962Smm * 1011209962Smm * Since we hold SCL_ZIO as writer here, clear both 1012209962Smm * values so the probe can reevaluate from first 1013209962Smm * principles. 1014209962Smm */ 1015209962Smm vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; 1016209962Smm vd->vdev_cant_read = B_FALSE; 1017209962Smm vd->vdev_cant_write = B_FALSE; 1018209962Smm } 1019209962Smm 1020209962Smm vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd, 1021209962Smm vdev_probe_done, vps, 1022209962Smm vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE); 1023209962Smm 1024219089Spjd /* 1025219089Spjd * We can't change the vdev state in this context, so we 1026219089Spjd * kick off an async task to do it on our behalf. 1027219089Spjd */ 1028209962Smm if (zio != NULL) { 1029209962Smm vd->vdev_probe_wanted = B_TRUE; 1030209962Smm spa_async_request(spa, SPA_ASYNC_PROBE); 1031209962Smm } 1032185029Spjd } 1033185029Spjd 1034209962Smm if (zio != NULL) 1035209962Smm zio_add_child(zio, pio); 1036185029Spjd 1037209962Smm mutex_exit(&vd->vdev_probe_lock); 1038185029Spjd 1039209962Smm if (vps == NULL) { 1040209962Smm ASSERT(zio != NULL); 1041209962Smm return (NULL); 1042209962Smm } 1043185029Spjd 1044185029Spjd for (int l = 1; l < VDEV_LABELS; l++) { 1045209962Smm zio_nowait(zio_read_phys(pio, vd, 1046185029Spjd vdev_label_offset(vd->vdev_psize, l, 1047209962Smm offsetof(vdev_label_t, vl_pad2)), 1048209962Smm VDEV_PAD_SIZE, zio_buf_alloc(VDEV_PAD_SIZE), 1049185029Spjd ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 1050185029Spjd ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); 1051185029Spjd } 1052185029Spjd 1053209962Smm if (zio == NULL) 1054209962Smm return (pio); 1055209962Smm 1056209962Smm zio_nowait(pio); 1057209962Smm return (NULL); 1058185029Spjd} 1059185029Spjd 1060219089Spjdstatic void 1061219089Spjdvdev_open_child(void *arg) 1062219089Spjd{ 1063219089Spjd vdev_t *vd = arg; 1064219089Spjd 1065219089Spjd vd->vdev_open_thread = curthread; 1066219089Spjd vd->vdev_open_error = vdev_open(vd); 1067219089Spjd vd->vdev_open_thread = NULL; 1068219089Spjd} 1069219089Spjd 1070219089Spjdboolean_t 1071219089Spjdvdev_uses_zvols(vdev_t *vd) 1072219089Spjd{ 1073219089Spjd if (vd->vdev_path && strncmp(vd->vdev_path, ZVOL_DIR, 1074219089Spjd strlen(ZVOL_DIR)) == 0) 1075219089Spjd return (B_TRUE); 1076219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1077219089Spjd if (vdev_uses_zvols(vd->vdev_child[c])) 1078219089Spjd return (B_TRUE); 1079219089Spjd return (B_FALSE); 1080219089Spjd} 1081219089Spjd 1082219089Spjdvoid 1083219089Spjdvdev_open_children(vdev_t *vd) 1084219089Spjd{ 1085219089Spjd taskq_t *tq; 1086219089Spjd int children = vd->vdev_children; 1087219089Spjd 1088219089Spjd /* 1089219089Spjd * in order to handle pools on top of zvols, do the opens 1090219089Spjd * in a single thread so that the same thread holds the 1091219089Spjd * spa_namespace_lock 1092219089Spjd */ 1093219089Spjd if (B_TRUE || vdev_uses_zvols(vd)) { 1094219089Spjd for (int c = 0; c < children; c++) 1095219089Spjd vd->vdev_child[c]->vdev_open_error = 1096219089Spjd vdev_open(vd->vdev_child[c]); 1097219089Spjd return; 1098219089Spjd } 1099219089Spjd tq = taskq_create("vdev_open", children, minclsyspri, 1100219089Spjd children, children, TASKQ_PREPOPULATE); 1101219089Spjd 1102219089Spjd for (int c = 0; c < children; c++) 1103219089Spjd VERIFY(taskq_dispatch(tq, vdev_open_child, vd->vdev_child[c], 1104219089Spjd TQ_SLEEP) != 0); 1105219089Spjd 1106219089Spjd taskq_destroy(tq); 1107219089Spjd} 1108219089Spjd 1109185029Spjd/* 1110168404Spjd * Prepare a virtual device for access. 1111168404Spjd */ 1112168404Spjdint 1113168404Spjdvdev_open(vdev_t *vd) 1114168404Spjd{ 1115209962Smm spa_t *spa = vd->vdev_spa; 1116168404Spjd int error; 1117168404Spjd uint64_t osize = 0; 1118236155Smm uint64_t max_osize = 0; 1119236155Smm uint64_t asize, max_asize, psize; 1120168404Spjd uint64_t ashift = 0; 1121168404Spjd 1122219089Spjd ASSERT(vd->vdev_open_thread == curthread || 1123219089Spjd spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1124168404Spjd ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || 1125168404Spjd vd->vdev_state == VDEV_STATE_CANT_OPEN || 1126168404Spjd vd->vdev_state == VDEV_STATE_OFFLINE); 1127168404Spjd 1128168404Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 1129213197Smm vd->vdev_cant_read = B_FALSE; 1130213197Smm vd->vdev_cant_write = B_FALSE; 1131219089Spjd vd->vdev_min_asize = vdev_get_min_asize(vd); 1132168404Spjd 1133219089Spjd /* 1134219089Spjd * If this vdev is not removed, check its fault status. If it's 1135219089Spjd * faulted, bail out of the open. 1136219089Spjd */ 1137185029Spjd if (!vd->vdev_removed && vd->vdev_faulted) { 1138168404Spjd ASSERT(vd->vdev_children == 0); 1139219089Spjd ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || 1140219089Spjd vd->vdev_label_aux == VDEV_AUX_EXTERNAL); 1141185029Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1142219089Spjd vd->vdev_label_aux); 1143185029Spjd return (ENXIO); 1144185029Spjd } else if (vd->vdev_offline) { 1145185029Spjd ASSERT(vd->vdev_children == 0); 1146168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); 1147168404Spjd return (ENXIO); 1148168404Spjd } 1149168404Spjd 1150236155Smm error = vd->vdev_ops->vdev_op_open(vd, &osize, &max_osize, &ashift); 1151168404Spjd 1152219089Spjd /* 1153219089Spjd * Reset the vdev_reopening flag so that we actually close 1154219089Spjd * the vdev on error. 1155219089Spjd */ 1156219089Spjd vd->vdev_reopening = B_FALSE; 1157168404Spjd if (zio_injection_enabled && error == 0) 1158213198Smm error = zio_handle_device_injection(vd, NULL, ENXIO); 1159168404Spjd 1160185029Spjd if (error) { 1161185029Spjd if (vd->vdev_removed && 1162185029Spjd vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) 1163185029Spjd vd->vdev_removed = B_FALSE; 1164168404Spjd 1165168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1166168404Spjd vd->vdev_stat.vs_aux); 1167168404Spjd return (error); 1168168404Spjd } 1169168404Spjd 1170185029Spjd vd->vdev_removed = B_FALSE; 1171168404Spjd 1172219089Spjd /* 1173219089Spjd * Recheck the faulted flag now that we have confirmed that 1174219089Spjd * the vdev is accessible. If we're faulted, bail. 1175219089Spjd */ 1176219089Spjd if (vd->vdev_faulted) { 1177219089Spjd ASSERT(vd->vdev_children == 0); 1178219089Spjd ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || 1179219089Spjd vd->vdev_label_aux == VDEV_AUX_EXTERNAL); 1180219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1181219089Spjd vd->vdev_label_aux); 1182219089Spjd return (ENXIO); 1183219089Spjd } 1184219089Spjd 1185185029Spjd if (vd->vdev_degraded) { 1186185029Spjd ASSERT(vd->vdev_children == 0); 1187185029Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 1188185029Spjd VDEV_AUX_ERR_EXCEEDED); 1189185029Spjd } else { 1190219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_HEALTHY, 0); 1191185029Spjd } 1192185029Spjd 1193219089Spjd /* 1194219089Spjd * For hole or missing vdevs we just return success. 1195219089Spjd */ 1196219089Spjd if (vd->vdev_ishole || vd->vdev_ops == &vdev_missing_ops) 1197219089Spjd return (0); 1198219089Spjd 1199240868Spjd if (vd->vdev_ops->vdev_op_leaf) { 1200240868Spjd vd->vdev_notrim = B_FALSE; 1201240868Spjd trim_map_create(vd); 1202240868Spjd } 1203240868Spjd 1204219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 1205168404Spjd if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { 1206168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 1207168404Spjd VDEV_AUX_NONE); 1208168404Spjd break; 1209168404Spjd } 1210219089Spjd } 1211168404Spjd 1212168404Spjd osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); 1213236155Smm max_osize = P2ALIGN(max_osize, (uint64_t)sizeof (vdev_label_t)); 1214168404Spjd 1215168404Spjd if (vd->vdev_children == 0) { 1216168404Spjd if (osize < SPA_MINDEVSIZE) { 1217168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1218168404Spjd VDEV_AUX_TOO_SMALL); 1219168404Spjd return (EOVERFLOW); 1220168404Spjd } 1221168404Spjd psize = osize; 1222168404Spjd asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); 1223236155Smm max_asize = max_osize - (VDEV_LABEL_START_SIZE + 1224236155Smm VDEV_LABEL_END_SIZE); 1225168404Spjd } else { 1226168404Spjd if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - 1227168404Spjd (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { 1228168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1229168404Spjd VDEV_AUX_TOO_SMALL); 1230168404Spjd return (EOVERFLOW); 1231168404Spjd } 1232168404Spjd psize = 0; 1233168404Spjd asize = osize; 1234236155Smm max_asize = max_osize; 1235168404Spjd } 1236168404Spjd 1237168404Spjd vd->vdev_psize = psize; 1238168404Spjd 1239219089Spjd /* 1240219089Spjd * Make sure the allocatable size hasn't shrunk. 1241219089Spjd */ 1242219089Spjd if (asize < vd->vdev_min_asize) { 1243219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1244219089Spjd VDEV_AUX_BAD_LABEL); 1245219089Spjd return (EINVAL); 1246219089Spjd } 1247219089Spjd 1248168404Spjd if (vd->vdev_asize == 0) { 1249168404Spjd /* 1250168404Spjd * This is the first-ever open, so use the computed values. 1251168404Spjd * For testing purposes, a higher ashift can be requested. 1252168404Spjd */ 1253168404Spjd vd->vdev_asize = asize; 1254236155Smm vd->vdev_max_asize = max_asize; 1255168404Spjd vd->vdev_ashift = MAX(ashift, vd->vdev_ashift); 1256168404Spjd } else { 1257168404Spjd /* 1258168404Spjd * Make sure the alignment requirement hasn't increased. 1259168404Spjd */ 1260168404Spjd if (ashift > vd->vdev_top->vdev_ashift) { 1261168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1262168404Spjd VDEV_AUX_BAD_LABEL); 1263168404Spjd return (EINVAL); 1264168404Spjd } 1265236155Smm vd->vdev_max_asize = max_asize; 1266219089Spjd } 1267168404Spjd 1268219089Spjd /* 1269219089Spjd * If all children are healthy and the asize has increased, 1270219089Spjd * then we've experienced dynamic LUN growth. If automatic 1271219089Spjd * expansion is enabled then use the additional space. 1272219089Spjd */ 1273219089Spjd if (vd->vdev_state == VDEV_STATE_HEALTHY && asize > vd->vdev_asize && 1274219089Spjd (vd->vdev_expanding || spa->spa_autoexpand)) 1275219089Spjd vd->vdev_asize = asize; 1276168404Spjd 1277219089Spjd vdev_set_min_asize(vd); 1278168404Spjd 1279168404Spjd /* 1280185029Spjd * Ensure we can issue some IO before declaring the 1281185029Spjd * vdev open for business. 1282185029Spjd */ 1283185029Spjd if (vd->vdev_ops->vdev_op_leaf && 1284185029Spjd (error = zio_wait(vdev_probe(vd, NULL))) != 0) { 1285219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1286219089Spjd VDEV_AUX_ERR_EXCEEDED); 1287185029Spjd return (error); 1288185029Spjd } 1289185029Spjd 1290185029Spjd /* 1291185029Spjd * If a leaf vdev has a DTL, and seems healthy, then kick off a 1292209962Smm * resilver. But don't do this if we are doing a reopen for a scrub, 1293209962Smm * since this would just restart the scrub we are already doing. 1294168404Spjd */ 1295209962Smm if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen && 1296209962Smm vdev_resilver_needed(vd, NULL, NULL)) 1297209962Smm spa_async_request(spa, SPA_ASYNC_RESILVER); 1298168404Spjd 1299168404Spjd return (0); 1300168404Spjd} 1301168404Spjd 1302168404Spjd/* 1303168404Spjd * Called once the vdevs are all opened, this routine validates the label 1304168404Spjd * contents. This needs to be done before vdev_load() so that we don't 1305185029Spjd * inadvertently do repair I/Os to the wrong device. 1306168404Spjd * 1307230514Smm * If 'strict' is false ignore the spa guid check. This is necessary because 1308230514Smm * if the machine crashed during a re-guid the new guid might have been written 1309230514Smm * to all of the vdev labels, but not the cached config. The strict check 1310230514Smm * will be performed when the pool is opened again using the mos config. 1311230514Smm * 1312168404Spjd * This function will only return failure if one of the vdevs indicates that it 1313168404Spjd * has since been destroyed or exported. This is only possible if 1314168404Spjd * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state 1315168404Spjd * will be updated but the function will return 0. 1316168404Spjd */ 1317168404Spjdint 1318230514Smmvdev_validate(vdev_t *vd, boolean_t strict) 1319168404Spjd{ 1320168404Spjd spa_t *spa = vd->vdev_spa; 1321168404Spjd nvlist_t *label; 1322219089Spjd uint64_t guid = 0, top_guid; 1323168404Spjd uint64_t state; 1324168404Spjd 1325219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1326230514Smm if (vdev_validate(vd->vdev_child[c], strict) != 0) 1327168926Spjd return (EBADF); 1328168404Spjd 1329168404Spjd /* 1330168404Spjd * If the device has already failed, or was marked offline, don't do 1331168404Spjd * any further validation. Otherwise, label I/O will fail and we will 1332168404Spjd * overwrite the previous state. 1333168404Spjd */ 1334185029Spjd if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { 1335219089Spjd uint64_t aux_guid = 0; 1336219089Spjd nvlist_t *nvl; 1337246631Smm uint64_t txg = spa_last_synced_txg(spa) != 0 ? 1338246631Smm spa_last_synced_txg(spa) : -1ULL; 1339168404Spjd 1340239620Smm if ((label = vdev_label_read_config(vd, txg)) == NULL) { 1341168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1342168404Spjd VDEV_AUX_BAD_LABEL); 1343168404Spjd return (0); 1344168404Spjd } 1345168404Spjd 1346219089Spjd /* 1347219089Spjd * Determine if this vdev has been split off into another 1348219089Spjd * pool. If so, then refuse to open it. 1349219089Spjd */ 1350219089Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_SPLIT_GUID, 1351219089Spjd &aux_guid) == 0 && aux_guid == spa_guid(spa)) { 1352219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1353219089Spjd VDEV_AUX_SPLIT_POOL); 1354219089Spjd nvlist_free(label); 1355219089Spjd return (0); 1356219089Spjd } 1357219089Spjd 1358230514Smm if (strict && (nvlist_lookup_uint64(label, 1359230514Smm ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 1360230514Smm guid != spa_guid(spa))) { 1361168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1362168404Spjd VDEV_AUX_CORRUPT_DATA); 1363168404Spjd nvlist_free(label); 1364168404Spjd return (0); 1365168404Spjd } 1366168404Spjd 1367219089Spjd if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvl) 1368219089Spjd != 0 || nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_ORIG_GUID, 1369219089Spjd &aux_guid) != 0) 1370219089Spjd aux_guid = 0; 1371219089Spjd 1372185029Spjd /* 1373185029Spjd * If this vdev just became a top-level vdev because its 1374185029Spjd * sibling was detached, it will have adopted the parent's 1375185029Spjd * vdev guid -- but the label may or may not be on disk yet. 1376185029Spjd * Fortunately, either version of the label will have the 1377185029Spjd * same top guid, so if we're a top-level vdev, we can 1378185029Spjd * safely compare to that instead. 1379219089Spjd * 1380219089Spjd * If we split this vdev off instead, then we also check the 1381219089Spjd * original pool's guid. We don't want to consider the vdev 1382219089Spjd * corrupt if it is partway through a split operation. 1383185029Spjd */ 1384168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, 1385185029Spjd &guid) != 0 || 1386185029Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, 1387185029Spjd &top_guid) != 0 || 1388219089Spjd ((vd->vdev_guid != guid && vd->vdev_guid != aux_guid) && 1389185029Spjd (vd->vdev_guid != top_guid || vd != vd->vdev_top))) { 1390168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1391168404Spjd VDEV_AUX_CORRUPT_DATA); 1392168404Spjd nvlist_free(label); 1393168404Spjd return (0); 1394168404Spjd } 1395168404Spjd 1396168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, 1397168404Spjd &state) != 0) { 1398168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1399168404Spjd VDEV_AUX_CORRUPT_DATA); 1400168404Spjd nvlist_free(label); 1401168404Spjd return (0); 1402168404Spjd } 1403168404Spjd 1404168404Spjd nvlist_free(label); 1405168404Spjd 1406209962Smm /* 1407219089Spjd * If this is a verbatim import, no need to check the 1408209962Smm * state of the pool. 1409209962Smm */ 1410219089Spjd if (!(spa->spa_import_flags & ZFS_IMPORT_VERBATIM) && 1411219089Spjd spa_load_state(spa) == SPA_LOAD_OPEN && 1412168404Spjd state != POOL_STATE_ACTIVE) 1413168926Spjd return (EBADF); 1414185029Spjd 1415185029Spjd /* 1416185029Spjd * If we were able to open and validate a vdev that was 1417185029Spjd * previously marked permanently unavailable, clear that state 1418185029Spjd * now. 1419185029Spjd */ 1420185029Spjd if (vd->vdev_not_present) 1421185029Spjd vd->vdev_not_present = 0; 1422168404Spjd } 1423168404Spjd 1424168404Spjd return (0); 1425168404Spjd} 1426168404Spjd 1427168404Spjd/* 1428168404Spjd * Close a virtual device. 1429168404Spjd */ 1430168404Spjdvoid 1431168404Spjdvdev_close(vdev_t *vd) 1432168404Spjd{ 1433209962Smm spa_t *spa = vd->vdev_spa; 1434219089Spjd vdev_t *pvd = vd->vdev_parent; 1435209962Smm 1436209962Smm ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1437209962Smm 1438219089Spjd /* 1439219089Spjd * If our parent is reopening, then we are as well, unless we are 1440219089Spjd * going offline. 1441219089Spjd */ 1442219089Spjd if (pvd != NULL && pvd->vdev_reopening) 1443219089Spjd vd->vdev_reopening = (pvd->vdev_reopening && !vd->vdev_offline); 1444219089Spjd 1445168404Spjd vd->vdev_ops->vdev_op_close(vd); 1446168404Spjd 1447185029Spjd vdev_cache_purge(vd); 1448168404Spjd 1449240868Spjd if (vd->vdev_ops->vdev_op_leaf) 1450240868Spjd trim_map_destroy(vd); 1451240868Spjd 1452168404Spjd /* 1453219089Spjd * We record the previous state before we close it, so that if we are 1454168404Spjd * doing a reopen(), we don't generate FMA ereports if we notice that 1455168404Spjd * it's still faulted. 1456168404Spjd */ 1457168404Spjd vd->vdev_prevstate = vd->vdev_state; 1458168404Spjd 1459168404Spjd if (vd->vdev_offline) 1460168404Spjd vd->vdev_state = VDEV_STATE_OFFLINE; 1461168404Spjd else 1462168404Spjd vd->vdev_state = VDEV_STATE_CLOSED; 1463168404Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 1464168404Spjd} 1465168404Spjd 1466168404Spjdvoid 1467219089Spjdvdev_hold(vdev_t *vd) 1468219089Spjd{ 1469219089Spjd spa_t *spa = vd->vdev_spa; 1470219089Spjd 1471219089Spjd ASSERT(spa_is_root(spa)); 1472219089Spjd if (spa->spa_state == POOL_STATE_UNINITIALIZED) 1473219089Spjd return; 1474219089Spjd 1475219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1476219089Spjd vdev_hold(vd->vdev_child[c]); 1477219089Spjd 1478219089Spjd if (vd->vdev_ops->vdev_op_leaf) 1479219089Spjd vd->vdev_ops->vdev_op_hold(vd); 1480219089Spjd} 1481219089Spjd 1482219089Spjdvoid 1483219089Spjdvdev_rele(vdev_t *vd) 1484219089Spjd{ 1485219089Spjd spa_t *spa = vd->vdev_spa; 1486219089Spjd 1487219089Spjd ASSERT(spa_is_root(spa)); 1488219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1489219089Spjd vdev_rele(vd->vdev_child[c]); 1490219089Spjd 1491219089Spjd if (vd->vdev_ops->vdev_op_leaf) 1492219089Spjd vd->vdev_ops->vdev_op_rele(vd); 1493219089Spjd} 1494219089Spjd 1495219089Spjd/* 1496219089Spjd * Reopen all interior vdevs and any unopened leaves. We don't actually 1497219089Spjd * reopen leaf vdevs which had previously been opened as they might deadlock 1498219089Spjd * on the spa_config_lock. Instead we only obtain the leaf's physical size. 1499219089Spjd * If the leaf has never been opened then open it, as usual. 1500219089Spjd */ 1501219089Spjdvoid 1502168404Spjdvdev_reopen(vdev_t *vd) 1503168404Spjd{ 1504168404Spjd spa_t *spa = vd->vdev_spa; 1505168404Spjd 1506185029Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1507168404Spjd 1508219089Spjd /* set the reopening flag unless we're taking the vdev offline */ 1509219089Spjd vd->vdev_reopening = !vd->vdev_offline; 1510168404Spjd vdev_close(vd); 1511168404Spjd (void) vdev_open(vd); 1512168404Spjd 1513168404Spjd /* 1514168404Spjd * Call vdev_validate() here to make sure we have the same device. 1515168404Spjd * Otherwise, a device with an invalid label could be successfully 1516168404Spjd * opened in response to vdev_reopen(). 1517168404Spjd */ 1518185029Spjd if (vd->vdev_aux) { 1519185029Spjd (void) vdev_validate_aux(vd); 1520185029Spjd if (vdev_readable(vd) && vdev_writeable(vd) && 1521209962Smm vd->vdev_aux == &spa->spa_l2cache && 1522219089Spjd !l2arc_vdev_present(vd)) 1523219089Spjd l2arc_add_vdev(spa, vd); 1524185029Spjd } else { 1525246631Smm (void) vdev_validate(vd, B_TRUE); 1526185029Spjd } 1527168404Spjd 1528168404Spjd /* 1529185029Spjd * Reassess parent vdev's health. 1530168404Spjd */ 1531185029Spjd vdev_propagate_state(vd); 1532168404Spjd} 1533168404Spjd 1534168404Spjdint 1535168404Spjdvdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) 1536168404Spjd{ 1537168404Spjd int error; 1538168404Spjd 1539168404Spjd /* 1540168404Spjd * Normally, partial opens (e.g. of a mirror) are allowed. 1541168404Spjd * For a create, however, we want to fail the request if 1542168404Spjd * there are any components we can't open. 1543168404Spjd */ 1544168404Spjd error = vdev_open(vd); 1545168404Spjd 1546168404Spjd if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { 1547168404Spjd vdev_close(vd); 1548168404Spjd return (error ? error : ENXIO); 1549168404Spjd } 1550168404Spjd 1551168404Spjd /* 1552168404Spjd * Recursively initialize all labels. 1553168404Spjd */ 1554168404Spjd if ((error = vdev_label_init(vd, txg, isreplacing ? 1555168404Spjd VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { 1556168404Spjd vdev_close(vd); 1557168404Spjd return (error); 1558168404Spjd } 1559168404Spjd 1560168404Spjd return (0); 1561168404Spjd} 1562168404Spjd 1563168404Spjdvoid 1564219089Spjdvdev_metaslab_set_size(vdev_t *vd) 1565168404Spjd{ 1566168404Spjd /* 1567168404Spjd * Aim for roughly 200 metaslabs per vdev. 1568168404Spjd */ 1569168404Spjd vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); 1570168404Spjd vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); 1571168404Spjd} 1572168404Spjd 1573168404Spjdvoid 1574168404Spjdvdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) 1575168404Spjd{ 1576168404Spjd ASSERT(vd == vd->vdev_top); 1577219089Spjd ASSERT(!vd->vdev_ishole); 1578168404Spjd ASSERT(ISP2(flags)); 1579219089Spjd ASSERT(spa_writeable(vd->vdev_spa)); 1580168404Spjd 1581168404Spjd if (flags & VDD_METASLAB) 1582168404Spjd (void) txg_list_add(&vd->vdev_ms_list, arg, txg); 1583168404Spjd 1584168404Spjd if (flags & VDD_DTL) 1585168404Spjd (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); 1586168404Spjd 1587168404Spjd (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); 1588168404Spjd} 1589168404Spjd 1590209962Smm/* 1591209962Smm * DTLs. 1592209962Smm * 1593209962Smm * A vdev's DTL (dirty time log) is the set of transaction groups for which 1594219089Spjd * the vdev has less than perfect replication. There are four kinds of DTL: 1595209962Smm * 1596209962Smm * DTL_MISSING: txgs for which the vdev has no valid copies of the data 1597209962Smm * 1598209962Smm * DTL_PARTIAL: txgs for which data is available, but not fully replicated 1599209962Smm * 1600209962Smm * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon 1601209962Smm * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of 1602209962Smm * txgs that was scrubbed. 1603209962Smm * 1604209962Smm * DTL_OUTAGE: txgs which cannot currently be read, whether due to 1605209962Smm * persistent errors or just some device being offline. 1606209962Smm * Unlike the other three, the DTL_OUTAGE map is not generally 1607209962Smm * maintained; it's only computed when needed, typically to 1608209962Smm * determine whether a device can be detached. 1609209962Smm * 1610209962Smm * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device 1611209962Smm * either has the data or it doesn't. 1612209962Smm * 1613209962Smm * For interior vdevs such as mirror and RAID-Z the picture is more complex. 1614209962Smm * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because 1615209962Smm * if any child is less than fully replicated, then so is its parent. 1616209962Smm * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs, 1617209962Smm * comprising only those txgs which appear in 'maxfaults' or more children; 1618209962Smm * those are the txgs we don't have enough replication to read. For example, 1619209962Smm * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2); 1620209962Smm * thus, its DTL_MISSING consists of the set of txgs that appear in more than 1621209962Smm * two child DTL_MISSING maps. 1622209962Smm * 1623209962Smm * It should be clear from the above that to compute the DTLs and outage maps 1624209962Smm * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps. 1625209962Smm * Therefore, that is all we keep on disk. When loading the pool, or after 1626209962Smm * a configuration change, we generate all other DTLs from first principles. 1627209962Smm */ 1628168404Spjdvoid 1629209962Smmvdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1630168404Spjd{ 1631209962Smm space_map_t *sm = &vd->vdev_dtl[t]; 1632209962Smm 1633209962Smm ASSERT(t < DTL_TYPES); 1634209962Smm ASSERT(vd != vd->vdev_spa->spa_root_vdev); 1635219089Spjd ASSERT(spa_writeable(vd->vdev_spa)); 1636209962Smm 1637168404Spjd mutex_enter(sm->sm_lock); 1638168404Spjd if (!space_map_contains(sm, txg, size)) 1639168404Spjd space_map_add(sm, txg, size); 1640168404Spjd mutex_exit(sm->sm_lock); 1641168404Spjd} 1642168404Spjd 1643209962Smmboolean_t 1644209962Smmvdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1645168404Spjd{ 1646209962Smm space_map_t *sm = &vd->vdev_dtl[t]; 1647209962Smm boolean_t dirty = B_FALSE; 1648168404Spjd 1649209962Smm ASSERT(t < DTL_TYPES); 1650209962Smm ASSERT(vd != vd->vdev_spa->spa_root_vdev); 1651168404Spjd 1652168404Spjd mutex_enter(sm->sm_lock); 1653209962Smm if (sm->sm_space != 0) 1654209962Smm dirty = space_map_contains(sm, txg, size); 1655168404Spjd mutex_exit(sm->sm_lock); 1656168404Spjd 1657168404Spjd return (dirty); 1658168404Spjd} 1659168404Spjd 1660209962Smmboolean_t 1661209962Smmvdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t) 1662209962Smm{ 1663209962Smm space_map_t *sm = &vd->vdev_dtl[t]; 1664209962Smm boolean_t empty; 1665209962Smm 1666209962Smm mutex_enter(sm->sm_lock); 1667209962Smm empty = (sm->sm_space == 0); 1668209962Smm mutex_exit(sm->sm_lock); 1669209962Smm 1670209962Smm return (empty); 1671209962Smm} 1672209962Smm 1673168404Spjd/* 1674168404Spjd * Reassess DTLs after a config change or scrub completion. 1675168404Spjd */ 1676168404Spjdvoid 1677168404Spjdvdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) 1678168404Spjd{ 1679168404Spjd spa_t *spa = vd->vdev_spa; 1680209962Smm avl_tree_t reftree; 1681209962Smm int minref; 1682168404Spjd 1683209962Smm ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 1684168404Spjd 1685209962Smm for (int c = 0; c < vd->vdev_children; c++) 1686209962Smm vdev_dtl_reassess(vd->vdev_child[c], txg, 1687209962Smm scrub_txg, scrub_done); 1688209962Smm 1689219089Spjd if (vd == spa->spa_root_vdev || vd->vdev_ishole || vd->vdev_aux) 1690209962Smm return; 1691209962Smm 1692209962Smm if (vd->vdev_ops->vdev_op_leaf) { 1693219089Spjd dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; 1694219089Spjd 1695168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1696185029Spjd if (scrub_txg != 0 && 1697219089Spjd (spa->spa_scrub_started || 1698219089Spjd (scn && scn->scn_phys.scn_errors == 0))) { 1699185029Spjd /* 1700185029Spjd * We completed a scrub up to scrub_txg. If we 1701185029Spjd * did it without rebooting, then the scrub dtl 1702185029Spjd * will be valid, so excise the old region and 1703185029Spjd * fold in the scrub dtl. Otherwise, leave the 1704185029Spjd * dtl as-is if there was an error. 1705209962Smm * 1706209962Smm * There's little trick here: to excise the beginning 1707209962Smm * of the DTL_MISSING map, we put it into a reference 1708209962Smm * tree and then add a segment with refcnt -1 that 1709209962Smm * covers the range [0, scrub_txg). This means 1710209962Smm * that each txg in that range has refcnt -1 or 0. 1711209962Smm * We then add DTL_SCRUB with a refcnt of 2, so that 1712209962Smm * entries in the range [0, scrub_txg) will have a 1713209962Smm * positive refcnt -- either 1 or 2. We then convert 1714209962Smm * the reference tree into the new DTL_MISSING map. 1715185029Spjd */ 1716209962Smm space_map_ref_create(&reftree); 1717209962Smm space_map_ref_add_map(&reftree, 1718209962Smm &vd->vdev_dtl[DTL_MISSING], 1); 1719209962Smm space_map_ref_add_seg(&reftree, 0, scrub_txg, -1); 1720209962Smm space_map_ref_add_map(&reftree, 1721209962Smm &vd->vdev_dtl[DTL_SCRUB], 2); 1722209962Smm space_map_ref_generate_map(&reftree, 1723209962Smm &vd->vdev_dtl[DTL_MISSING], 1); 1724209962Smm space_map_ref_destroy(&reftree); 1725168404Spjd } 1726209962Smm space_map_vacate(&vd->vdev_dtl[DTL_PARTIAL], NULL, NULL); 1727209962Smm space_map_walk(&vd->vdev_dtl[DTL_MISSING], 1728209962Smm space_map_add, &vd->vdev_dtl[DTL_PARTIAL]); 1729168404Spjd if (scrub_done) 1730209962Smm space_map_vacate(&vd->vdev_dtl[DTL_SCRUB], NULL, NULL); 1731209962Smm space_map_vacate(&vd->vdev_dtl[DTL_OUTAGE], NULL, NULL); 1732209962Smm if (!vdev_readable(vd)) 1733209962Smm space_map_add(&vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL); 1734209962Smm else 1735209962Smm space_map_walk(&vd->vdev_dtl[DTL_MISSING], 1736209962Smm space_map_add, &vd->vdev_dtl[DTL_OUTAGE]); 1737168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1738185029Spjd 1739168404Spjd if (txg != 0) 1740168404Spjd vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); 1741168404Spjd return; 1742168404Spjd } 1743168404Spjd 1744168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1745209962Smm for (int t = 0; t < DTL_TYPES; t++) { 1746209962Smm /* account for child's outage in parent's missing map */ 1747209962Smm int s = (t == DTL_MISSING) ? DTL_OUTAGE: t; 1748209962Smm if (t == DTL_SCRUB) 1749209962Smm continue; /* leaf vdevs only */ 1750209962Smm if (t == DTL_PARTIAL) 1751209962Smm minref = 1; /* i.e. non-zero */ 1752209962Smm else if (vd->vdev_nparity != 0) 1753209962Smm minref = vd->vdev_nparity + 1; /* RAID-Z */ 1754209962Smm else 1755209962Smm minref = vd->vdev_children; /* any kind of mirror */ 1756209962Smm space_map_ref_create(&reftree); 1757209962Smm for (int c = 0; c < vd->vdev_children; c++) { 1758209962Smm vdev_t *cvd = vd->vdev_child[c]; 1759209962Smm mutex_enter(&cvd->vdev_dtl_lock); 1760209962Smm space_map_ref_add_map(&reftree, &cvd->vdev_dtl[s], 1); 1761209962Smm mutex_exit(&cvd->vdev_dtl_lock); 1762209962Smm } 1763209962Smm space_map_ref_generate_map(&reftree, &vd->vdev_dtl[t], minref); 1764209962Smm space_map_ref_destroy(&reftree); 1765209962Smm } 1766168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1767168404Spjd} 1768168404Spjd 1769168404Spjdstatic int 1770168404Spjdvdev_dtl_load(vdev_t *vd) 1771168404Spjd{ 1772168404Spjd spa_t *spa = vd->vdev_spa; 1773209962Smm space_map_obj_t *smo = &vd->vdev_dtl_smo; 1774168404Spjd objset_t *mos = spa->spa_meta_objset; 1775168404Spjd dmu_buf_t *db; 1776168404Spjd int error; 1777168404Spjd 1778168404Spjd ASSERT(vd->vdev_children == 0); 1779168404Spjd 1780168404Spjd if (smo->smo_object == 0) 1781168404Spjd return (0); 1782168404Spjd 1783219089Spjd ASSERT(!vd->vdev_ishole); 1784219089Spjd 1785168404Spjd if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) 1786168404Spjd return (error); 1787168404Spjd 1788185029Spjd ASSERT3U(db->db_size, >=, sizeof (*smo)); 1789185029Spjd bcopy(db->db_data, smo, sizeof (*smo)); 1790168404Spjd dmu_buf_rele(db, FTAG); 1791168404Spjd 1792168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1793209962Smm error = space_map_load(&vd->vdev_dtl[DTL_MISSING], 1794209962Smm NULL, SM_ALLOC, smo, mos); 1795168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1796168404Spjd 1797168404Spjd return (error); 1798168404Spjd} 1799168404Spjd 1800168404Spjdvoid 1801168404Spjdvdev_dtl_sync(vdev_t *vd, uint64_t txg) 1802168404Spjd{ 1803168404Spjd spa_t *spa = vd->vdev_spa; 1804209962Smm space_map_obj_t *smo = &vd->vdev_dtl_smo; 1805209962Smm space_map_t *sm = &vd->vdev_dtl[DTL_MISSING]; 1806168404Spjd objset_t *mos = spa->spa_meta_objset; 1807168404Spjd space_map_t smsync; 1808168404Spjd kmutex_t smlock; 1809168404Spjd dmu_buf_t *db; 1810168404Spjd dmu_tx_t *tx; 1811168404Spjd 1812219089Spjd ASSERT(!vd->vdev_ishole); 1813219089Spjd 1814168404Spjd tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 1815168404Spjd 1816168404Spjd if (vd->vdev_detached) { 1817168404Spjd if (smo->smo_object != 0) { 1818168404Spjd int err = dmu_object_free(mos, smo->smo_object, tx); 1819240415Smm ASSERT0(err); 1820168404Spjd smo->smo_object = 0; 1821168404Spjd } 1822168404Spjd dmu_tx_commit(tx); 1823168404Spjd return; 1824168404Spjd } 1825168404Spjd 1826168404Spjd if (smo->smo_object == 0) { 1827168404Spjd ASSERT(smo->smo_objsize == 0); 1828168404Spjd ASSERT(smo->smo_alloc == 0); 1829168404Spjd smo->smo_object = dmu_object_alloc(mos, 1830168404Spjd DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, 1831168404Spjd DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); 1832168404Spjd ASSERT(smo->smo_object != 0); 1833168404Spjd vdev_config_dirty(vd->vdev_top); 1834168404Spjd } 1835168404Spjd 1836168404Spjd mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); 1837168404Spjd 1838168404Spjd space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, 1839168404Spjd &smlock); 1840168404Spjd 1841168404Spjd mutex_enter(&smlock); 1842168404Spjd 1843168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1844168404Spjd space_map_walk(sm, space_map_add, &smsync); 1845168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1846168404Spjd 1847168404Spjd space_map_truncate(smo, mos, tx); 1848168404Spjd space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); 1849168404Spjd 1850168404Spjd space_map_destroy(&smsync); 1851168404Spjd 1852168404Spjd mutex_exit(&smlock); 1853168404Spjd mutex_destroy(&smlock); 1854168404Spjd 1855168404Spjd VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); 1856168404Spjd dmu_buf_will_dirty(db, tx); 1857185029Spjd ASSERT3U(db->db_size, >=, sizeof (*smo)); 1858185029Spjd bcopy(smo, db->db_data, sizeof (*smo)); 1859168404Spjd dmu_buf_rele(db, FTAG); 1860168404Spjd 1861168404Spjd dmu_tx_commit(tx); 1862168404Spjd} 1863168404Spjd 1864185029Spjd/* 1865209962Smm * Determine whether the specified vdev can be offlined/detached/removed 1866209962Smm * without losing data. 1867209962Smm */ 1868209962Smmboolean_t 1869209962Smmvdev_dtl_required(vdev_t *vd) 1870209962Smm{ 1871209962Smm spa_t *spa = vd->vdev_spa; 1872209962Smm vdev_t *tvd = vd->vdev_top; 1873209962Smm uint8_t cant_read = vd->vdev_cant_read; 1874209962Smm boolean_t required; 1875209962Smm 1876209962Smm ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1877209962Smm 1878209962Smm if (vd == spa->spa_root_vdev || vd == tvd) 1879209962Smm return (B_TRUE); 1880209962Smm 1881209962Smm /* 1882209962Smm * Temporarily mark the device as unreadable, and then determine 1883209962Smm * whether this results in any DTL outages in the top-level vdev. 1884209962Smm * If not, we can safely offline/detach/remove the device. 1885209962Smm */ 1886209962Smm vd->vdev_cant_read = B_TRUE; 1887209962Smm vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 1888209962Smm required = !vdev_dtl_empty(tvd, DTL_OUTAGE); 1889209962Smm vd->vdev_cant_read = cant_read; 1890209962Smm vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 1891209962Smm 1892219089Spjd if (!required && zio_injection_enabled) 1893219089Spjd required = !!zio_handle_device_injection(vd, NULL, ECHILD); 1894219089Spjd 1895209962Smm return (required); 1896209962Smm} 1897209962Smm 1898209962Smm/* 1899185029Spjd * Determine if resilver is needed, and if so the txg range. 1900185029Spjd */ 1901185029Spjdboolean_t 1902185029Spjdvdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) 1903185029Spjd{ 1904185029Spjd boolean_t needed = B_FALSE; 1905185029Spjd uint64_t thismin = UINT64_MAX; 1906185029Spjd uint64_t thismax = 0; 1907185029Spjd 1908185029Spjd if (vd->vdev_children == 0) { 1909185029Spjd mutex_enter(&vd->vdev_dtl_lock); 1910209962Smm if (vd->vdev_dtl[DTL_MISSING].sm_space != 0 && 1911209962Smm vdev_writeable(vd)) { 1912185029Spjd space_seg_t *ss; 1913185029Spjd 1914209962Smm ss = avl_first(&vd->vdev_dtl[DTL_MISSING].sm_root); 1915185029Spjd thismin = ss->ss_start - 1; 1916209962Smm ss = avl_last(&vd->vdev_dtl[DTL_MISSING].sm_root); 1917185029Spjd thismax = ss->ss_end; 1918185029Spjd needed = B_TRUE; 1919185029Spjd } 1920185029Spjd mutex_exit(&vd->vdev_dtl_lock); 1921185029Spjd } else { 1922209962Smm for (int c = 0; c < vd->vdev_children; c++) { 1923185029Spjd vdev_t *cvd = vd->vdev_child[c]; 1924185029Spjd uint64_t cmin, cmax; 1925185029Spjd 1926185029Spjd if (vdev_resilver_needed(cvd, &cmin, &cmax)) { 1927185029Spjd thismin = MIN(thismin, cmin); 1928185029Spjd thismax = MAX(thismax, cmax); 1929185029Spjd needed = B_TRUE; 1930185029Spjd } 1931185029Spjd } 1932185029Spjd } 1933185029Spjd 1934185029Spjd if (needed && minp) { 1935185029Spjd *minp = thismin; 1936185029Spjd *maxp = thismax; 1937185029Spjd } 1938185029Spjd return (needed); 1939185029Spjd} 1940185029Spjd 1941168404Spjdvoid 1942168404Spjdvdev_load(vdev_t *vd) 1943168404Spjd{ 1944168404Spjd /* 1945168404Spjd * Recursively load all children. 1946168404Spjd */ 1947209962Smm for (int c = 0; c < vd->vdev_children; c++) 1948168404Spjd vdev_load(vd->vdev_child[c]); 1949168404Spjd 1950168404Spjd /* 1951168404Spjd * If this is a top-level vdev, initialize its metaslabs. 1952168404Spjd */ 1953219089Spjd if (vd == vd->vdev_top && !vd->vdev_ishole && 1954168404Spjd (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || 1955168404Spjd vdev_metaslab_init(vd, 0) != 0)) 1956168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1957168404Spjd VDEV_AUX_CORRUPT_DATA); 1958168404Spjd 1959168404Spjd /* 1960168404Spjd * If this is a leaf vdev, load its DTL. 1961168404Spjd */ 1962168404Spjd if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) 1963168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1964168404Spjd VDEV_AUX_CORRUPT_DATA); 1965168404Spjd} 1966168404Spjd 1967168404Spjd/* 1968185029Spjd * The special vdev case is used for hot spares and l2cache devices. Its 1969185029Spjd * sole purpose it to set the vdev state for the associated vdev. To do this, 1970185029Spjd * we make sure that we can open the underlying device, then try to read the 1971185029Spjd * label, and make sure that the label is sane and that it hasn't been 1972185029Spjd * repurposed to another pool. 1973168404Spjd */ 1974168404Spjdint 1975185029Spjdvdev_validate_aux(vdev_t *vd) 1976168404Spjd{ 1977168404Spjd nvlist_t *label; 1978168404Spjd uint64_t guid, version; 1979168404Spjd uint64_t state; 1980168404Spjd 1981185029Spjd if (!vdev_readable(vd)) 1982185029Spjd return (0); 1983185029Spjd 1984239620Smm if ((label = vdev_label_read_config(vd, -1ULL)) == NULL) { 1985168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1986168404Spjd VDEV_AUX_CORRUPT_DATA); 1987168404Spjd return (-1); 1988168404Spjd } 1989168404Spjd 1990168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || 1991236884Smm !SPA_VERSION_IS_SUPPORTED(version) || 1992168404Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || 1993168404Spjd guid != vd->vdev_guid || 1994168404Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { 1995168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1996168404Spjd VDEV_AUX_CORRUPT_DATA); 1997168404Spjd nvlist_free(label); 1998168404Spjd return (-1); 1999168404Spjd } 2000168404Spjd 2001168404Spjd /* 2002168404Spjd * We don't actually check the pool state here. If it's in fact in 2003168404Spjd * use by another pool, we update this fact on the fly when requested. 2004168404Spjd */ 2005168404Spjd nvlist_free(label); 2006168404Spjd return (0); 2007168404Spjd} 2008168404Spjd 2009168404Spjdvoid 2010219089Spjdvdev_remove(vdev_t *vd, uint64_t txg) 2011219089Spjd{ 2012219089Spjd spa_t *spa = vd->vdev_spa; 2013219089Spjd objset_t *mos = spa->spa_meta_objset; 2014219089Spjd dmu_tx_t *tx; 2015219089Spjd 2016219089Spjd tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg); 2017219089Spjd 2018219089Spjd if (vd->vdev_dtl_smo.smo_object) { 2019240415Smm ASSERT0(vd->vdev_dtl_smo.smo_alloc); 2020219089Spjd (void) dmu_object_free(mos, vd->vdev_dtl_smo.smo_object, tx); 2021219089Spjd vd->vdev_dtl_smo.smo_object = 0; 2022219089Spjd } 2023219089Spjd 2024219089Spjd if (vd->vdev_ms != NULL) { 2025219089Spjd for (int m = 0; m < vd->vdev_ms_count; m++) { 2026219089Spjd metaslab_t *msp = vd->vdev_ms[m]; 2027219089Spjd 2028219089Spjd if (msp == NULL || msp->ms_smo.smo_object == 0) 2029219089Spjd continue; 2030219089Spjd 2031240415Smm ASSERT0(msp->ms_smo.smo_alloc); 2032219089Spjd (void) dmu_object_free(mos, msp->ms_smo.smo_object, tx); 2033219089Spjd msp->ms_smo.smo_object = 0; 2034219089Spjd } 2035219089Spjd } 2036219089Spjd 2037219089Spjd if (vd->vdev_ms_array) { 2038219089Spjd (void) dmu_object_free(mos, vd->vdev_ms_array, tx); 2039219089Spjd vd->vdev_ms_array = 0; 2040219089Spjd vd->vdev_ms_shift = 0; 2041219089Spjd } 2042219089Spjd dmu_tx_commit(tx); 2043219089Spjd} 2044219089Spjd 2045219089Spjdvoid 2046168404Spjdvdev_sync_done(vdev_t *vd, uint64_t txg) 2047168404Spjd{ 2048168404Spjd metaslab_t *msp; 2049211931Smm boolean_t reassess = !txg_list_empty(&vd->vdev_ms_list, TXG_CLEAN(txg)); 2050168404Spjd 2051219089Spjd ASSERT(!vd->vdev_ishole); 2052219089Spjd 2053168404Spjd while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) 2054168404Spjd metaslab_sync_done(msp, txg); 2055211931Smm 2056211931Smm if (reassess) 2057211931Smm metaslab_sync_reassess(vd->vdev_mg); 2058168404Spjd} 2059168404Spjd 2060168404Spjdvoid 2061168404Spjdvdev_sync(vdev_t *vd, uint64_t txg) 2062168404Spjd{ 2063168404Spjd spa_t *spa = vd->vdev_spa; 2064168404Spjd vdev_t *lvd; 2065168404Spjd metaslab_t *msp; 2066168404Spjd dmu_tx_t *tx; 2067168404Spjd 2068219089Spjd ASSERT(!vd->vdev_ishole); 2069219089Spjd 2070168404Spjd if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { 2071168404Spjd ASSERT(vd == vd->vdev_top); 2072168404Spjd tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 2073168404Spjd vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, 2074168404Spjd DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); 2075168404Spjd ASSERT(vd->vdev_ms_array != 0); 2076168404Spjd vdev_config_dirty(vd); 2077168404Spjd dmu_tx_commit(tx); 2078168404Spjd } 2079168404Spjd 2080219089Spjd /* 2081219089Spjd * Remove the metadata associated with this vdev once it's empty. 2082219089Spjd */ 2083219089Spjd if (vd->vdev_stat.vs_alloc == 0 && vd->vdev_removing) 2084219089Spjd vdev_remove(vd, txg); 2085219089Spjd 2086168404Spjd while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { 2087168404Spjd metaslab_sync(msp, txg); 2088168404Spjd (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); 2089168404Spjd } 2090168404Spjd 2091168404Spjd while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) 2092168404Spjd vdev_dtl_sync(lvd, txg); 2093168404Spjd 2094168404Spjd (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); 2095168404Spjd} 2096168404Spjd 2097168404Spjduint64_t 2098168404Spjdvdev_psize_to_asize(vdev_t *vd, uint64_t psize) 2099168404Spjd{ 2100168404Spjd return (vd->vdev_ops->vdev_op_asize(vd, psize)); 2101168404Spjd} 2102168404Spjd 2103185029Spjd/* 2104185029Spjd * Mark the given vdev faulted. A faulted vdev behaves as if the device could 2105185029Spjd * not be opened, and no I/O is attempted. 2106185029Spjd */ 2107185029Spjdint 2108219089Spjdvdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux) 2109168404Spjd{ 2110219089Spjd vdev_t *vd, *tvd; 2111168404Spjd 2112219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2113185029Spjd 2114185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2115185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2116185029Spjd 2117185029Spjd if (!vd->vdev_ops->vdev_op_leaf) 2118185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2119185029Spjd 2120219089Spjd tvd = vd->vdev_top; 2121219089Spjd 2122185029Spjd /* 2123219089Spjd * We don't directly use the aux state here, but if we do a 2124219089Spjd * vdev_reopen(), we need this value to be present to remember why we 2125219089Spjd * were faulted. 2126219089Spjd */ 2127219089Spjd vd->vdev_label_aux = aux; 2128219089Spjd 2129219089Spjd /* 2130185029Spjd * Faulted state takes precedence over degraded. 2131185029Spjd */ 2132219089Spjd vd->vdev_delayed_close = B_FALSE; 2133185029Spjd vd->vdev_faulted = 1ULL; 2134185029Spjd vd->vdev_degraded = 0ULL; 2135219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, aux); 2136185029Spjd 2137185029Spjd /* 2138219089Spjd * If this device has the only valid copy of the data, then 2139219089Spjd * back off and simply mark the vdev as degraded instead. 2140185029Spjd */ 2141219089Spjd if (!tvd->vdev_islog && vd->vdev_aux == NULL && vdev_dtl_required(vd)) { 2142185029Spjd vd->vdev_degraded = 1ULL; 2143185029Spjd vd->vdev_faulted = 0ULL; 2144185029Spjd 2145185029Spjd /* 2146185029Spjd * If we reopen the device and it's not dead, only then do we 2147185029Spjd * mark it degraded. 2148185029Spjd */ 2149219089Spjd vdev_reopen(tvd); 2150185029Spjd 2151219089Spjd if (vdev_readable(vd)) 2152219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, aux); 2153185029Spjd } 2154185029Spjd 2155185029Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2156168404Spjd} 2157168404Spjd 2158185029Spjd/* 2159185029Spjd * Mark the given vdev degraded. A degraded vdev is purely an indication to the 2160185029Spjd * user that something is wrong. The vdev continues to operate as normal as far 2161185029Spjd * as I/O is concerned. 2162185029Spjd */ 2163185029Spjdint 2164219089Spjdvdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux) 2165168404Spjd{ 2166185029Spjd vdev_t *vd; 2167168404Spjd 2168219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2169168404Spjd 2170185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2171185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2172168404Spjd 2173185029Spjd if (!vd->vdev_ops->vdev_op_leaf) 2174185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2175185029Spjd 2176185029Spjd /* 2177185029Spjd * If the vdev is already faulted, then don't do anything. 2178185029Spjd */ 2179185029Spjd if (vd->vdev_faulted || vd->vdev_degraded) 2180185029Spjd return (spa_vdev_state_exit(spa, NULL, 0)); 2181185029Spjd 2182185029Spjd vd->vdev_degraded = 1ULL; 2183185029Spjd if (!vdev_is_dead(vd)) 2184185029Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, 2185219089Spjd aux); 2186185029Spjd 2187185029Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2188168404Spjd} 2189168404Spjd 2190185029Spjd/* 2191185029Spjd * Online the given vdev. If 'unspare' is set, it implies two things. First, 2192185029Spjd * any attached spare device should be detached when the device finishes 2193185029Spjd * resilvering. Second, the online should be treated like a 'test' online case, 2194185029Spjd * so no FMA events are generated if the device fails to open. 2195185029Spjd */ 2196168404Spjdint 2197185029Spjdvdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) 2198168404Spjd{ 2199219089Spjd vdev_t *vd, *tvd, *pvd, *rvd = spa->spa_root_vdev; 2200168404Spjd 2201219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2202168404Spjd 2203185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2204185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2205168404Spjd 2206168404Spjd if (!vd->vdev_ops->vdev_op_leaf) 2207185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2208168404Spjd 2209219089Spjd tvd = vd->vdev_top; 2210168404Spjd vd->vdev_offline = B_FALSE; 2211168404Spjd vd->vdev_tmpoffline = B_FALSE; 2212185029Spjd vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); 2213185029Spjd vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); 2214219089Spjd 2215219089Spjd /* XXX - L2ARC 1.0 does not support expansion */ 2216219089Spjd if (!vd->vdev_aux) { 2217219089Spjd for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2218219089Spjd pvd->vdev_expanding = !!(flags & ZFS_ONLINE_EXPAND); 2219219089Spjd } 2220219089Spjd 2221219089Spjd vdev_reopen(tvd); 2222185029Spjd vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; 2223168404Spjd 2224219089Spjd if (!vd->vdev_aux) { 2225219089Spjd for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2226219089Spjd pvd->vdev_expanding = B_FALSE; 2227219089Spjd } 2228219089Spjd 2229185029Spjd if (newstate) 2230185029Spjd *newstate = vd->vdev_state; 2231185029Spjd if ((flags & ZFS_ONLINE_UNSPARE) && 2232185029Spjd !vdev_is_dead(vd) && vd->vdev_parent && 2233185029Spjd vd->vdev_parent->vdev_ops == &vdev_spare_ops && 2234185029Spjd vd->vdev_parent->vdev_child[0] == vd) 2235185029Spjd vd->vdev_unspare = B_TRUE; 2236168404Spjd 2237219089Spjd if ((flags & ZFS_ONLINE_EXPAND) || spa->spa_autoexpand) { 2238219089Spjd 2239219089Spjd /* XXX - L2ARC 1.0 does not support expansion */ 2240219089Spjd if (vd->vdev_aux) 2241219089Spjd return (spa_vdev_state_exit(spa, vd, ENOTSUP)); 2242219089Spjd spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2243219089Spjd } 2244209962Smm return (spa_vdev_state_exit(spa, vd, 0)); 2245168404Spjd} 2246168404Spjd 2247219089Spjdstatic int 2248219089Spjdvdev_offline_locked(spa_t *spa, uint64_t guid, uint64_t flags) 2249168404Spjd{ 2250213197Smm vdev_t *vd, *tvd; 2251219089Spjd int error = 0; 2252219089Spjd uint64_t generation; 2253219089Spjd metaslab_group_t *mg; 2254168404Spjd 2255219089Spjdtop: 2256219089Spjd spa_vdev_state_enter(spa, SCL_ALLOC); 2257168404Spjd 2258185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2259185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2260168404Spjd 2261168404Spjd if (!vd->vdev_ops->vdev_op_leaf) 2262185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2263168404Spjd 2264213197Smm tvd = vd->vdev_top; 2265219089Spjd mg = tvd->vdev_mg; 2266219089Spjd generation = spa->spa_config_generation + 1; 2267213197Smm 2268168404Spjd /* 2269168404Spjd * If the device isn't already offline, try to offline it. 2270168404Spjd */ 2271168404Spjd if (!vd->vdev_offline) { 2272168404Spjd /* 2273209962Smm * If this device has the only valid copy of some data, 2274213197Smm * don't allow it to be offlined. Log devices are always 2275213197Smm * expendable. 2276168404Spjd */ 2277213197Smm if (!tvd->vdev_islog && vd->vdev_aux == NULL && 2278213197Smm vdev_dtl_required(vd)) 2279185029Spjd return (spa_vdev_state_exit(spa, NULL, EBUSY)); 2280168404Spjd 2281168404Spjd /* 2282219089Spjd * If the top-level is a slog and it has had allocations 2283219089Spjd * then proceed. We check that the vdev's metaslab group 2284219089Spjd * is not NULL since it's possible that we may have just 2285219089Spjd * added this vdev but not yet initialized its metaslabs. 2286219089Spjd */ 2287219089Spjd if (tvd->vdev_islog && mg != NULL) { 2288219089Spjd /* 2289219089Spjd * Prevent any future allocations. 2290219089Spjd */ 2291219089Spjd metaslab_group_passivate(mg); 2292219089Spjd (void) spa_vdev_state_exit(spa, vd, 0); 2293219089Spjd 2294219089Spjd error = spa_offline_log(spa); 2295219089Spjd 2296219089Spjd spa_vdev_state_enter(spa, SCL_ALLOC); 2297219089Spjd 2298219089Spjd /* 2299219089Spjd * Check to see if the config has changed. 2300219089Spjd */ 2301219089Spjd if (error || generation != spa->spa_config_generation) { 2302219089Spjd metaslab_group_activate(mg); 2303219089Spjd if (error) 2304219089Spjd return (spa_vdev_state_exit(spa, 2305219089Spjd vd, error)); 2306219089Spjd (void) spa_vdev_state_exit(spa, vd, 0); 2307219089Spjd goto top; 2308219089Spjd } 2309240415Smm ASSERT0(tvd->vdev_stat.vs_alloc); 2310219089Spjd } 2311219089Spjd 2312219089Spjd /* 2313168404Spjd * Offline this device and reopen its top-level vdev. 2314213197Smm * If the top-level vdev is a log device then just offline 2315213197Smm * it. Otherwise, if this action results in the top-level 2316213197Smm * vdev becoming unusable, undo it and fail the request. 2317168404Spjd */ 2318168404Spjd vd->vdev_offline = B_TRUE; 2319213197Smm vdev_reopen(tvd); 2320213197Smm 2321213197Smm if (!tvd->vdev_islog && vd->vdev_aux == NULL && 2322213197Smm vdev_is_dead(tvd)) { 2323168404Spjd vd->vdev_offline = B_FALSE; 2324213197Smm vdev_reopen(tvd); 2325185029Spjd return (spa_vdev_state_exit(spa, NULL, EBUSY)); 2326168404Spjd } 2327219089Spjd 2328219089Spjd /* 2329219089Spjd * Add the device back into the metaslab rotor so that 2330219089Spjd * once we online the device it's open for business. 2331219089Spjd */ 2332219089Spjd if (tvd->vdev_islog && mg != NULL) 2333219089Spjd metaslab_group_activate(mg); 2334168404Spjd } 2335168404Spjd 2336185029Spjd vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); 2337168404Spjd 2338219089Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2339219089Spjd} 2340213197Smm 2341219089Spjdint 2342219089Spjdvdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) 2343219089Spjd{ 2344219089Spjd int error; 2345213197Smm 2346219089Spjd mutex_enter(&spa->spa_vdev_top_lock); 2347219089Spjd error = vdev_offline_locked(spa, guid, flags); 2348219089Spjd mutex_exit(&spa->spa_vdev_top_lock); 2349219089Spjd 2350219089Spjd return (error); 2351168404Spjd} 2352168404Spjd 2353168404Spjd/* 2354168404Spjd * Clear the error counts associated with this vdev. Unlike vdev_online() and 2355168404Spjd * vdev_offline(), we assume the spa config is locked. We also clear all 2356168404Spjd * children. If 'vd' is NULL, then the user wants to clear all vdevs. 2357168404Spjd */ 2358168404Spjdvoid 2359168404Spjdvdev_clear(spa_t *spa, vdev_t *vd) 2360168404Spjd{ 2361185029Spjd vdev_t *rvd = spa->spa_root_vdev; 2362168404Spjd 2363185029Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 2364185029Spjd 2365168404Spjd if (vd == NULL) 2366185029Spjd vd = rvd; 2367168404Spjd 2368168404Spjd vd->vdev_stat.vs_read_errors = 0; 2369168404Spjd vd->vdev_stat.vs_write_errors = 0; 2370168404Spjd vd->vdev_stat.vs_checksum_errors = 0; 2371168404Spjd 2372185029Spjd for (int c = 0; c < vd->vdev_children; c++) 2373168404Spjd vdev_clear(spa, vd->vdev_child[c]); 2374185029Spjd 2375185029Spjd /* 2376185029Spjd * If we're in the FAULTED state or have experienced failed I/O, then 2377185029Spjd * clear the persistent state and attempt to reopen the device. We 2378185029Spjd * also mark the vdev config dirty, so that the new faulted state is 2379185029Spjd * written out to disk. 2380185029Spjd */ 2381185029Spjd if (vd->vdev_faulted || vd->vdev_degraded || 2382185029Spjd !vdev_readable(vd) || !vdev_writeable(vd)) { 2383185029Spjd 2384219089Spjd /* 2385219089Spjd * When reopening in reponse to a clear event, it may be due to 2386219089Spjd * a fmadm repair request. In this case, if the device is 2387219089Spjd * still broken, we want to still post the ereport again. 2388219089Spjd */ 2389219089Spjd vd->vdev_forcefault = B_TRUE; 2390219089Spjd 2391219089Spjd vd->vdev_faulted = vd->vdev_degraded = 0ULL; 2392185029Spjd vd->vdev_cant_read = B_FALSE; 2393185029Spjd vd->vdev_cant_write = B_FALSE; 2394185029Spjd 2395219089Spjd vdev_reopen(vd == rvd ? rvd : vd->vdev_top); 2396185029Spjd 2397219089Spjd vd->vdev_forcefault = B_FALSE; 2398219089Spjd 2399219089Spjd if (vd != rvd && vdev_writeable(vd->vdev_top)) 2400185029Spjd vdev_state_dirty(vd->vdev_top); 2401185029Spjd 2402185029Spjd if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) 2403185029Spjd spa_async_request(spa, SPA_ASYNC_RESILVER); 2404185029Spjd 2405185029Spjd spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR); 2406185029Spjd } 2407219089Spjd 2408219089Spjd /* 2409219089Spjd * When clearing a FMA-diagnosed fault, we always want to 2410219089Spjd * unspare the device, as we assume that the original spare was 2411219089Spjd * done in response to the FMA fault. 2412219089Spjd */ 2413219089Spjd if (!vdev_is_dead(vd) && vd->vdev_parent != NULL && 2414219089Spjd vd->vdev_parent->vdev_ops == &vdev_spare_ops && 2415219089Spjd vd->vdev_parent->vdev_child[0] == vd) 2416219089Spjd vd->vdev_unspare = B_TRUE; 2417168404Spjd} 2418168404Spjd 2419185029Spjdboolean_t 2420168404Spjdvdev_is_dead(vdev_t *vd) 2421168404Spjd{ 2422219089Spjd /* 2423219089Spjd * Holes and missing devices are always considered "dead". 2424219089Spjd * This simplifies the code since we don't have to check for 2425219089Spjd * these types of devices in the various code paths. 2426219089Spjd * Instead we rely on the fact that we skip over dead devices 2427219089Spjd * before issuing I/O to them. 2428219089Spjd */ 2429219089Spjd return (vd->vdev_state < VDEV_STATE_DEGRADED || vd->vdev_ishole || 2430219089Spjd vd->vdev_ops == &vdev_missing_ops); 2431168404Spjd} 2432168404Spjd 2433185029Spjdboolean_t 2434185029Spjdvdev_readable(vdev_t *vd) 2435168404Spjd{ 2436185029Spjd return (!vdev_is_dead(vd) && !vd->vdev_cant_read); 2437185029Spjd} 2438168404Spjd 2439185029Spjdboolean_t 2440185029Spjdvdev_writeable(vdev_t *vd) 2441185029Spjd{ 2442185029Spjd return (!vdev_is_dead(vd) && !vd->vdev_cant_write); 2443185029Spjd} 2444168404Spjd 2445185029Spjdboolean_t 2446208370Smmvdev_allocatable(vdev_t *vd) 2447208370Smm{ 2448209962Smm uint64_t state = vd->vdev_state; 2449209962Smm 2450208370Smm /* 2451209962Smm * We currently allow allocations from vdevs which may be in the 2452208370Smm * process of reopening (i.e. VDEV_STATE_CLOSED). If the device 2453208370Smm * fails to reopen then we'll catch it later when we're holding 2454209962Smm * the proper locks. Note that we have to get the vdev state 2455209962Smm * in a local variable because although it changes atomically, 2456209962Smm * we're asking two separate questions about it. 2457208370Smm */ 2458209962Smm return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) && 2459219089Spjd !vd->vdev_cant_write && !vd->vdev_ishole); 2460208370Smm} 2461208370Smm 2462208370Smmboolean_t 2463185029Spjdvdev_accessible(vdev_t *vd, zio_t *zio) 2464185029Spjd{ 2465185029Spjd ASSERT(zio->io_vd == vd); 2466168404Spjd 2467185029Spjd if (vdev_is_dead(vd) || vd->vdev_remove_wanted) 2468185029Spjd return (B_FALSE); 2469168404Spjd 2470185029Spjd if (zio->io_type == ZIO_TYPE_READ) 2471185029Spjd return (!vd->vdev_cant_read); 2472168404Spjd 2473185029Spjd if (zio->io_type == ZIO_TYPE_WRITE) 2474185029Spjd return (!vd->vdev_cant_write); 2475168404Spjd 2476185029Spjd return (B_TRUE); 2477168404Spjd} 2478168404Spjd 2479168404Spjd/* 2480168404Spjd * Get statistics for the given vdev. 2481168404Spjd */ 2482168404Spjdvoid 2483168404Spjdvdev_get_stats(vdev_t *vd, vdev_stat_t *vs) 2484168404Spjd{ 2485168404Spjd vdev_t *rvd = vd->vdev_spa->spa_root_vdev; 2486168404Spjd 2487168404Spjd mutex_enter(&vd->vdev_stat_lock); 2488168404Spjd bcopy(&vd->vdev_stat, vs, sizeof (*vs)); 2489168404Spjd vs->vs_timestamp = gethrtime() - vs->vs_timestamp; 2490168404Spjd vs->vs_state = vd->vdev_state; 2491219089Spjd vs->vs_rsize = vdev_get_min_asize(vd); 2492219089Spjd if (vd->vdev_ops->vdev_op_leaf) 2493219089Spjd vs->vs_rsize += VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE; 2494236155Smm vs->vs_esize = vd->vdev_max_asize - vd->vdev_asize; 2495168404Spjd mutex_exit(&vd->vdev_stat_lock); 2496168404Spjd 2497168404Spjd /* 2498168404Spjd * If we're getting stats on the root vdev, aggregate the I/O counts 2499168404Spjd * over all top-level vdevs (i.e. the direct children of the root). 2500168404Spjd */ 2501168404Spjd if (vd == rvd) { 2502185029Spjd for (int c = 0; c < rvd->vdev_children; c++) { 2503168404Spjd vdev_t *cvd = rvd->vdev_child[c]; 2504168404Spjd vdev_stat_t *cvs = &cvd->vdev_stat; 2505168404Spjd 2506168404Spjd mutex_enter(&vd->vdev_stat_lock); 2507185029Spjd for (int t = 0; t < ZIO_TYPES; t++) { 2508168404Spjd vs->vs_ops[t] += cvs->vs_ops[t]; 2509168404Spjd vs->vs_bytes[t] += cvs->vs_bytes[t]; 2510168404Spjd } 2511219089Spjd cvs->vs_scan_removing = cvd->vdev_removing; 2512168404Spjd mutex_exit(&vd->vdev_stat_lock); 2513168404Spjd } 2514168404Spjd } 2515168404Spjd} 2516168404Spjd 2517168404Spjdvoid 2518185029Spjdvdev_clear_stats(vdev_t *vd) 2519168404Spjd{ 2520185029Spjd mutex_enter(&vd->vdev_stat_lock); 2521185029Spjd vd->vdev_stat.vs_space = 0; 2522185029Spjd vd->vdev_stat.vs_dspace = 0; 2523185029Spjd vd->vdev_stat.vs_alloc = 0; 2524185029Spjd mutex_exit(&vd->vdev_stat_lock); 2525185029Spjd} 2526185029Spjd 2527185029Spjdvoid 2528219089Spjdvdev_scan_stat_init(vdev_t *vd) 2529219089Spjd{ 2530219089Spjd vdev_stat_t *vs = &vd->vdev_stat; 2531219089Spjd 2532219089Spjd for (int c = 0; c < vd->vdev_children; c++) 2533219089Spjd vdev_scan_stat_init(vd->vdev_child[c]); 2534219089Spjd 2535219089Spjd mutex_enter(&vd->vdev_stat_lock); 2536219089Spjd vs->vs_scan_processed = 0; 2537219089Spjd mutex_exit(&vd->vdev_stat_lock); 2538219089Spjd} 2539219089Spjd 2540219089Spjdvoid 2541185029Spjdvdev_stat_update(zio_t *zio, uint64_t psize) 2542185029Spjd{ 2543209962Smm spa_t *spa = zio->io_spa; 2544209962Smm vdev_t *rvd = spa->spa_root_vdev; 2545185029Spjd vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; 2546168404Spjd vdev_t *pvd; 2547168404Spjd uint64_t txg = zio->io_txg; 2548168404Spjd vdev_stat_t *vs = &vd->vdev_stat; 2549168404Spjd zio_type_t type = zio->io_type; 2550168404Spjd int flags = zio->io_flags; 2551168404Spjd 2552185029Spjd /* 2553185029Spjd * If this i/o is a gang leader, it didn't do any actual work. 2554185029Spjd */ 2555185029Spjd if (zio->io_gang_tree) 2556185029Spjd return; 2557185029Spjd 2558168404Spjd if (zio->io_error == 0) { 2559185029Spjd /* 2560185029Spjd * If this is a root i/o, don't count it -- we've already 2561185029Spjd * counted the top-level vdevs, and vdev_get_stats() will 2562185029Spjd * aggregate them when asked. This reduces contention on 2563185029Spjd * the root vdev_stat_lock and implicitly handles blocks 2564185029Spjd * that compress away to holes, for which there is no i/o. 2565185029Spjd * (Holes never create vdev children, so all the counters 2566185029Spjd * remain zero, which is what we want.) 2567185029Spjd * 2568185029Spjd * Note: this only applies to successful i/o (io_error == 0) 2569185029Spjd * because unlike i/o counts, errors are not additive. 2570185029Spjd * When reading a ditto block, for example, failure of 2571185029Spjd * one top-level vdev does not imply a root-level error. 2572185029Spjd */ 2573185029Spjd if (vd == rvd) 2574185029Spjd return; 2575185029Spjd 2576185029Spjd ASSERT(vd == zio->io_vd); 2577209962Smm 2578209962Smm if (flags & ZIO_FLAG_IO_BYPASS) 2579209962Smm return; 2580209962Smm 2581209962Smm mutex_enter(&vd->vdev_stat_lock); 2582209962Smm 2583185029Spjd if (flags & ZIO_FLAG_IO_REPAIR) { 2584219089Spjd if (flags & ZIO_FLAG_SCAN_THREAD) { 2585219089Spjd dsl_scan_phys_t *scn_phys = 2586219089Spjd &spa->spa_dsl_pool->dp_scan->scn_phys; 2587219089Spjd uint64_t *processed = &scn_phys->scn_processed; 2588219089Spjd 2589219089Spjd /* XXX cleanup? */ 2590219089Spjd if (vd->vdev_ops->vdev_op_leaf) 2591219089Spjd atomic_add_64(processed, psize); 2592219089Spjd vs->vs_scan_processed += psize; 2593219089Spjd } 2594219089Spjd 2595209962Smm if (flags & ZIO_FLAG_SELF_HEAL) 2596185029Spjd vs->vs_self_healed += psize; 2597168404Spjd } 2598209962Smm 2599209962Smm vs->vs_ops[type]++; 2600209962Smm vs->vs_bytes[type] += psize; 2601209962Smm 2602209962Smm mutex_exit(&vd->vdev_stat_lock); 2603168404Spjd return; 2604168404Spjd } 2605168404Spjd 2606168404Spjd if (flags & ZIO_FLAG_SPECULATIVE) 2607168404Spjd return; 2608168404Spjd 2609213198Smm /* 2610213198Smm * If this is an I/O error that is going to be retried, then ignore the 2611213198Smm * error. Otherwise, the user may interpret B_FAILFAST I/O errors as 2612213198Smm * hard errors, when in reality they can happen for any number of 2613213198Smm * innocuous reasons (bus resets, MPxIO link failure, etc). 2614213198Smm */ 2615213198Smm if (zio->io_error == EIO && 2616213198Smm !(zio->io_flags & ZIO_FLAG_IO_RETRY)) 2617213198Smm return; 2618213198Smm 2619219089Spjd /* 2620219089Spjd * Intent logs writes won't propagate their error to the root 2621219089Spjd * I/O so don't mark these types of failures as pool-level 2622219089Spjd * errors. 2623219089Spjd */ 2624219089Spjd if (zio->io_vd == NULL && (zio->io_flags & ZIO_FLAG_DONT_PROPAGATE)) 2625219089Spjd return; 2626219089Spjd 2627185029Spjd mutex_enter(&vd->vdev_stat_lock); 2628209962Smm if (type == ZIO_TYPE_READ && !vdev_is_dead(vd)) { 2629185029Spjd if (zio->io_error == ECKSUM) 2630185029Spjd vs->vs_checksum_errors++; 2631185029Spjd else 2632185029Spjd vs->vs_read_errors++; 2633168404Spjd } 2634209962Smm if (type == ZIO_TYPE_WRITE && !vdev_is_dead(vd)) 2635185029Spjd vs->vs_write_errors++; 2636185029Spjd mutex_exit(&vd->vdev_stat_lock); 2637168404Spjd 2638209962Smm if (type == ZIO_TYPE_WRITE && txg != 0 && 2639209962Smm (!(flags & ZIO_FLAG_IO_REPAIR) || 2640219089Spjd (flags & ZIO_FLAG_SCAN_THREAD) || 2641219089Spjd spa->spa_claiming)) { 2642209962Smm /* 2643219089Spjd * This is either a normal write (not a repair), or it's 2644219089Spjd * a repair induced by the scrub thread, or it's a repair 2645219089Spjd * made by zil_claim() during spa_load() in the first txg. 2646219089Spjd * In the normal case, we commit the DTL change in the same 2647219089Spjd * txg as the block was born. In the scrub-induced repair 2648219089Spjd * case, we know that scrubs run in first-pass syncing context, 2649219089Spjd * so we commit the DTL change in spa_syncing_txg(spa). 2650219089Spjd * In the zil_claim() case, we commit in spa_first_txg(spa). 2651209962Smm * 2652209962Smm * We currently do not make DTL entries for failed spontaneous 2653209962Smm * self-healing writes triggered by normal (non-scrubbing) 2654209962Smm * reads, because we have no transactional context in which to 2655209962Smm * do so -- and it's not clear that it'd be desirable anyway. 2656209962Smm */ 2657209962Smm if (vd->vdev_ops->vdev_op_leaf) { 2658209962Smm uint64_t commit_txg = txg; 2659219089Spjd if (flags & ZIO_FLAG_SCAN_THREAD) { 2660209962Smm ASSERT(flags & ZIO_FLAG_IO_REPAIR); 2661209962Smm ASSERT(spa_sync_pass(spa) == 1); 2662209962Smm vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1); 2663219089Spjd commit_txg = spa_syncing_txg(spa); 2664219089Spjd } else if (spa->spa_claiming) { 2665219089Spjd ASSERT(flags & ZIO_FLAG_IO_REPAIR); 2666219089Spjd commit_txg = spa_first_txg(spa); 2667209962Smm } 2668219089Spjd ASSERT(commit_txg >= spa_syncing_txg(spa)); 2669209962Smm if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1)) 2670168404Spjd return; 2671209962Smm for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2672209962Smm vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1); 2673209962Smm vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg); 2674168404Spjd } 2675209962Smm if (vd != rvd) 2676209962Smm vdev_dtl_dirty(vd, DTL_MISSING, txg, 1); 2677168404Spjd } 2678168404Spjd} 2679168404Spjd 2680168404Spjd/* 2681219089Spjd * Update the in-core space usage stats for this vdev, its metaslab class, 2682219089Spjd * and the root vdev. 2683168404Spjd */ 2684168404Spjdvoid 2685219089Spjdvdev_space_update(vdev_t *vd, int64_t alloc_delta, int64_t defer_delta, 2686219089Spjd int64_t space_delta) 2687168404Spjd{ 2688168404Spjd int64_t dspace_delta = space_delta; 2689185029Spjd spa_t *spa = vd->vdev_spa; 2690185029Spjd vdev_t *rvd = spa->spa_root_vdev; 2691219089Spjd metaslab_group_t *mg = vd->vdev_mg; 2692219089Spjd metaslab_class_t *mc = mg ? mg->mg_class : NULL; 2693168404Spjd 2694185029Spjd ASSERT(vd == vd->vdev_top); 2695168404Spjd 2696185029Spjd /* 2697185029Spjd * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion 2698185029Spjd * factor. We must calculate this here and not at the root vdev 2699185029Spjd * because the root vdev's psize-to-asize is simply the max of its 2700185029Spjd * childrens', thus not accurate enough for us. 2701185029Spjd */ 2702185029Spjd ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); 2703213197Smm ASSERT(vd->vdev_deflate_ratio != 0 || vd->vdev_isl2cache); 2704185029Spjd dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * 2705185029Spjd vd->vdev_deflate_ratio; 2706185029Spjd 2707185029Spjd mutex_enter(&vd->vdev_stat_lock); 2708219089Spjd vd->vdev_stat.vs_alloc += alloc_delta; 2709185029Spjd vd->vdev_stat.vs_space += space_delta; 2710185029Spjd vd->vdev_stat.vs_dspace += dspace_delta; 2711185029Spjd mutex_exit(&vd->vdev_stat_lock); 2712185029Spjd 2713219089Spjd if (mc == spa_normal_class(spa)) { 2714185029Spjd mutex_enter(&rvd->vdev_stat_lock); 2715219089Spjd rvd->vdev_stat.vs_alloc += alloc_delta; 2716185029Spjd rvd->vdev_stat.vs_space += space_delta; 2717185029Spjd rvd->vdev_stat.vs_dspace += dspace_delta; 2718185029Spjd mutex_exit(&rvd->vdev_stat_lock); 2719185029Spjd } 2720219089Spjd 2721219089Spjd if (mc != NULL) { 2722219089Spjd ASSERT(rvd == vd->vdev_parent); 2723219089Spjd ASSERT(vd->vdev_ms_count != 0); 2724219089Spjd 2725219089Spjd metaslab_class_space_update(mc, 2726219089Spjd alloc_delta, defer_delta, space_delta, dspace_delta); 2727219089Spjd } 2728168404Spjd} 2729168404Spjd 2730168404Spjd/* 2731168404Spjd * Mark a top-level vdev's config as dirty, placing it on the dirty list 2732168404Spjd * so that it will be written out next time the vdev configuration is synced. 2733168404Spjd * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. 2734168404Spjd */ 2735168404Spjdvoid 2736168404Spjdvdev_config_dirty(vdev_t *vd) 2737168404Spjd{ 2738168404Spjd spa_t *spa = vd->vdev_spa; 2739168404Spjd vdev_t *rvd = spa->spa_root_vdev; 2740168404Spjd int c; 2741168404Spjd 2742219089Spjd ASSERT(spa_writeable(spa)); 2743219089Spjd 2744168404Spjd /* 2745209962Smm * If this is an aux vdev (as with l2cache and spare devices), then we 2746209962Smm * update the vdev config manually and set the sync flag. 2747185029Spjd */ 2748185029Spjd if (vd->vdev_aux != NULL) { 2749185029Spjd spa_aux_vdev_t *sav = vd->vdev_aux; 2750185029Spjd nvlist_t **aux; 2751185029Spjd uint_t naux; 2752185029Spjd 2753185029Spjd for (c = 0; c < sav->sav_count; c++) { 2754185029Spjd if (sav->sav_vdevs[c] == vd) 2755185029Spjd break; 2756185029Spjd } 2757185029Spjd 2758185029Spjd if (c == sav->sav_count) { 2759185029Spjd /* 2760185029Spjd * We're being removed. There's nothing more to do. 2761185029Spjd */ 2762185029Spjd ASSERT(sav->sav_sync == B_TRUE); 2763185029Spjd return; 2764185029Spjd } 2765185029Spjd 2766185029Spjd sav->sav_sync = B_TRUE; 2767185029Spjd 2768209962Smm if (nvlist_lookup_nvlist_array(sav->sav_config, 2769209962Smm ZPOOL_CONFIG_L2CACHE, &aux, &naux) != 0) { 2770209962Smm VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 2771209962Smm ZPOOL_CONFIG_SPARES, &aux, &naux) == 0); 2772209962Smm } 2773185029Spjd 2774185029Spjd ASSERT(c < naux); 2775185029Spjd 2776185029Spjd /* 2777185029Spjd * Setting the nvlist in the middle if the array is a little 2778185029Spjd * sketchy, but it will work. 2779185029Spjd */ 2780185029Spjd nvlist_free(aux[c]); 2781219089Spjd aux[c] = vdev_config_generate(spa, vd, B_TRUE, 0); 2782185029Spjd 2783185029Spjd return; 2784185029Spjd } 2785185029Spjd 2786185029Spjd /* 2787185029Spjd * The dirty list is protected by the SCL_CONFIG lock. The caller 2788185029Spjd * must either hold SCL_CONFIG as writer, or must be the sync thread 2789185029Spjd * (which holds SCL_CONFIG as reader). There's only one sync thread, 2790168404Spjd * so this is sufficient to ensure mutual exclusion. 2791168404Spjd */ 2792185029Spjd ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 2793185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2794185029Spjd spa_config_held(spa, SCL_CONFIG, RW_READER))); 2795168404Spjd 2796168404Spjd if (vd == rvd) { 2797168404Spjd for (c = 0; c < rvd->vdev_children; c++) 2798168404Spjd vdev_config_dirty(rvd->vdev_child[c]); 2799168404Spjd } else { 2800168404Spjd ASSERT(vd == vd->vdev_top); 2801168404Spjd 2802219089Spjd if (!list_link_active(&vd->vdev_config_dirty_node) && 2803219089Spjd !vd->vdev_ishole) 2804185029Spjd list_insert_head(&spa->spa_config_dirty_list, vd); 2805168404Spjd } 2806168404Spjd} 2807168404Spjd 2808168404Spjdvoid 2809168404Spjdvdev_config_clean(vdev_t *vd) 2810168404Spjd{ 2811168404Spjd spa_t *spa = vd->vdev_spa; 2812168404Spjd 2813185029Spjd ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 2814185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2815185029Spjd spa_config_held(spa, SCL_CONFIG, RW_READER))); 2816168404Spjd 2817185029Spjd ASSERT(list_link_active(&vd->vdev_config_dirty_node)); 2818185029Spjd list_remove(&spa->spa_config_dirty_list, vd); 2819168404Spjd} 2820168404Spjd 2821185029Spjd/* 2822185029Spjd * Mark a top-level vdev's state as dirty, so that the next pass of 2823185029Spjd * spa_sync() can convert this into vdev_config_dirty(). We distinguish 2824185029Spjd * the state changes from larger config changes because they require 2825185029Spjd * much less locking, and are often needed for administrative actions. 2826185029Spjd */ 2827168404Spjdvoid 2828185029Spjdvdev_state_dirty(vdev_t *vd) 2829185029Spjd{ 2830185029Spjd spa_t *spa = vd->vdev_spa; 2831185029Spjd 2832219089Spjd ASSERT(spa_writeable(spa)); 2833185029Spjd ASSERT(vd == vd->vdev_top); 2834185029Spjd 2835185029Spjd /* 2836185029Spjd * The state list is protected by the SCL_STATE lock. The caller 2837185029Spjd * must either hold SCL_STATE as writer, or must be the sync thread 2838185029Spjd * (which holds SCL_STATE as reader). There's only one sync thread, 2839185029Spjd * so this is sufficient to ensure mutual exclusion. 2840185029Spjd */ 2841185029Spjd ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 2842185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2843185029Spjd spa_config_held(spa, SCL_STATE, RW_READER))); 2844185029Spjd 2845219089Spjd if (!list_link_active(&vd->vdev_state_dirty_node) && !vd->vdev_ishole) 2846185029Spjd list_insert_head(&spa->spa_state_dirty_list, vd); 2847185029Spjd} 2848185029Spjd 2849185029Spjdvoid 2850185029Spjdvdev_state_clean(vdev_t *vd) 2851185029Spjd{ 2852185029Spjd spa_t *spa = vd->vdev_spa; 2853185029Spjd 2854185029Spjd ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 2855185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2856185029Spjd spa_config_held(spa, SCL_STATE, RW_READER))); 2857185029Spjd 2858185029Spjd ASSERT(list_link_active(&vd->vdev_state_dirty_node)); 2859185029Spjd list_remove(&spa->spa_state_dirty_list, vd); 2860185029Spjd} 2861185029Spjd 2862185029Spjd/* 2863185029Spjd * Propagate vdev state up from children to parent. 2864185029Spjd */ 2865185029Spjdvoid 2866168404Spjdvdev_propagate_state(vdev_t *vd) 2867168404Spjd{ 2868209962Smm spa_t *spa = vd->vdev_spa; 2869209962Smm vdev_t *rvd = spa->spa_root_vdev; 2870168404Spjd int degraded = 0, faulted = 0; 2871168404Spjd int corrupted = 0; 2872168404Spjd vdev_t *child; 2873168404Spjd 2874185029Spjd if (vd->vdev_children > 0) { 2875219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 2876185029Spjd child = vd->vdev_child[c]; 2877168404Spjd 2878219089Spjd /* 2879219089Spjd * Don't factor holes into the decision. 2880219089Spjd */ 2881219089Spjd if (child->vdev_ishole) 2882219089Spjd continue; 2883219089Spjd 2884185029Spjd if (!vdev_readable(child) || 2885209962Smm (!vdev_writeable(child) && spa_writeable(spa))) { 2886185029Spjd /* 2887185029Spjd * Root special: if there is a top-level log 2888185029Spjd * device, treat the root vdev as if it were 2889185029Spjd * degraded. 2890185029Spjd */ 2891185029Spjd if (child->vdev_islog && vd == rvd) 2892185029Spjd degraded++; 2893185029Spjd else 2894185029Spjd faulted++; 2895185029Spjd } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { 2896185029Spjd degraded++; 2897185029Spjd } 2898185029Spjd 2899185029Spjd if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) 2900185029Spjd corrupted++; 2901185029Spjd } 2902185029Spjd 2903185029Spjd vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); 2904185029Spjd 2905185029Spjd /* 2906185029Spjd * Root special: if there is a top-level vdev that cannot be 2907185029Spjd * opened due to corrupted metadata, then propagate the root 2908185029Spjd * vdev's aux state as 'corrupt' rather than 'insufficient 2909185029Spjd * replicas'. 2910185029Spjd */ 2911185029Spjd if (corrupted && vd == rvd && 2912185029Spjd rvd->vdev_state == VDEV_STATE_CANT_OPEN) 2913185029Spjd vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, 2914185029Spjd VDEV_AUX_CORRUPT_DATA); 2915168404Spjd } 2916168404Spjd 2917185029Spjd if (vd->vdev_parent) 2918185029Spjd vdev_propagate_state(vd->vdev_parent); 2919168404Spjd} 2920168404Spjd 2921168404Spjd/* 2922168404Spjd * Set a vdev's state. If this is during an open, we don't update the parent 2923168404Spjd * state, because we're in the process of opening children depth-first. 2924168404Spjd * Otherwise, we propagate the change to the parent. 2925168404Spjd * 2926168404Spjd * If this routine places a device in a faulted state, an appropriate ereport is 2927168404Spjd * generated. 2928168404Spjd */ 2929168404Spjdvoid 2930168404Spjdvdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) 2931168404Spjd{ 2932168404Spjd uint64_t save_state; 2933185029Spjd spa_t *spa = vd->vdev_spa; 2934168404Spjd 2935168404Spjd if (state == vd->vdev_state) { 2936168404Spjd vd->vdev_stat.vs_aux = aux; 2937168404Spjd return; 2938168404Spjd } 2939168404Spjd 2940168404Spjd save_state = vd->vdev_state; 2941168404Spjd 2942168404Spjd vd->vdev_state = state; 2943168404Spjd vd->vdev_stat.vs_aux = aux; 2944168404Spjd 2945173373Spjd /* 2946173373Spjd * If we are setting the vdev state to anything but an open state, then 2947219089Spjd * always close the underlying device unless the device has requested 2948219089Spjd * a delayed close (i.e. we're about to remove or fault the device). 2949219089Spjd * Otherwise, we keep accessible but invalid devices open forever. 2950219089Spjd * We don't call vdev_close() itself, because that implies some extra 2951219089Spjd * checks (offline, etc) that we don't want here. This is limited to 2952219089Spjd * leaf devices, because otherwise closing the device will affect other 2953219089Spjd * children. 2954173373Spjd */ 2955219089Spjd if (!vd->vdev_delayed_close && vdev_is_dead(vd) && 2956219089Spjd vd->vdev_ops->vdev_op_leaf) 2957173373Spjd vd->vdev_ops->vdev_op_close(vd); 2958173373Spjd 2959219089Spjd /* 2960219089Spjd * If we have brought this vdev back into service, we need 2961219089Spjd * to notify fmd so that it can gracefully repair any outstanding 2962219089Spjd * cases due to a missing device. We do this in all cases, even those 2963219089Spjd * that probably don't correlate to a repaired fault. This is sure to 2964219089Spjd * catch all cases, and we let the zfs-retire agent sort it out. If 2965219089Spjd * this is a transient state it's OK, as the retire agent will 2966219089Spjd * double-check the state of the vdev before repairing it. 2967219089Spjd */ 2968219089Spjd if (state == VDEV_STATE_HEALTHY && vd->vdev_ops->vdev_op_leaf && 2969219089Spjd vd->vdev_prevstate != state) 2970219089Spjd zfs_post_state_change(spa, vd); 2971219089Spjd 2972185029Spjd if (vd->vdev_removed && 2973185029Spjd state == VDEV_STATE_CANT_OPEN && 2974185029Spjd (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { 2975168404Spjd /* 2976185029Spjd * If the previous state is set to VDEV_STATE_REMOVED, then this 2977185029Spjd * device was previously marked removed and someone attempted to 2978185029Spjd * reopen it. If this failed due to a nonexistent device, then 2979185029Spjd * keep the device in the REMOVED state. We also let this be if 2980185029Spjd * it is one of our special test online cases, which is only 2981185029Spjd * attempting to online the device and shouldn't generate an FMA 2982185029Spjd * fault. 2983185029Spjd */ 2984185029Spjd vd->vdev_state = VDEV_STATE_REMOVED; 2985185029Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 2986185029Spjd } else if (state == VDEV_STATE_REMOVED) { 2987185029Spjd vd->vdev_removed = B_TRUE; 2988185029Spjd } else if (state == VDEV_STATE_CANT_OPEN) { 2989185029Spjd /* 2990219089Spjd * If we fail to open a vdev during an import or recovery, we 2991219089Spjd * mark it as "not available", which signifies that it was 2992219089Spjd * never there to begin with. Failure to open such a device 2993219089Spjd * is not considered an error. 2994168404Spjd */ 2995219089Spjd if ((spa_load_state(spa) == SPA_LOAD_IMPORT || 2996219089Spjd spa_load_state(spa) == SPA_LOAD_RECOVER) && 2997168404Spjd vd->vdev_ops->vdev_op_leaf) 2998168404Spjd vd->vdev_not_present = 1; 2999168404Spjd 3000168404Spjd /* 3001168404Spjd * Post the appropriate ereport. If the 'prevstate' field is 3002168404Spjd * set to something other than VDEV_STATE_UNKNOWN, it indicates 3003168404Spjd * that this is part of a vdev_reopen(). In this case, we don't 3004168404Spjd * want to post the ereport if the device was already in the 3005168404Spjd * CANT_OPEN state beforehand. 3006185029Spjd * 3007185029Spjd * If the 'checkremove' flag is set, then this is an attempt to 3008185029Spjd * online the device in response to an insertion event. If we 3009185029Spjd * hit this case, then we have detected an insertion event for a 3010185029Spjd * faulted or offline device that wasn't in the removed state. 3011185029Spjd * In this scenario, we don't post an ereport because we are 3012185029Spjd * about to replace the device, or attempt an online with 3013185029Spjd * vdev_forcefault, which will generate the fault for us. 3014168404Spjd */ 3015185029Spjd if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && 3016185029Spjd !vd->vdev_not_present && !vd->vdev_checkremove && 3017185029Spjd vd != spa->spa_root_vdev) { 3018168404Spjd const char *class; 3019168404Spjd 3020168404Spjd switch (aux) { 3021168404Spjd case VDEV_AUX_OPEN_FAILED: 3022168404Spjd class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; 3023168404Spjd break; 3024168404Spjd case VDEV_AUX_CORRUPT_DATA: 3025168404Spjd class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; 3026168404Spjd break; 3027168404Spjd case VDEV_AUX_NO_REPLICAS: 3028168404Spjd class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; 3029168404Spjd break; 3030168404Spjd case VDEV_AUX_BAD_GUID_SUM: 3031168404Spjd class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; 3032168404Spjd break; 3033168404Spjd case VDEV_AUX_TOO_SMALL: 3034168404Spjd class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; 3035168404Spjd break; 3036168404Spjd case VDEV_AUX_BAD_LABEL: 3037168404Spjd class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; 3038168404Spjd break; 3039168404Spjd default: 3040168404Spjd class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; 3041168404Spjd } 3042168404Spjd 3043185029Spjd zfs_ereport_post(class, spa, vd, NULL, save_state, 0); 3044168404Spjd } 3045185029Spjd 3046185029Spjd /* Erase any notion of persistent removed state */ 3047185029Spjd vd->vdev_removed = B_FALSE; 3048185029Spjd } else { 3049185029Spjd vd->vdev_removed = B_FALSE; 3050168404Spjd } 3051168404Spjd 3052209962Smm if (!isopen && vd->vdev_parent) 3053209962Smm vdev_propagate_state(vd->vdev_parent); 3054185029Spjd} 3055168404Spjd 3056185029Spjd/* 3057185029Spjd * Check the vdev configuration to ensure that it's capable of supporting 3058193163Sdfr * a root pool. 3059193163Sdfr * 3060193163Sdfr * On Solaris, we do not support RAID-Z or partial configuration. In 3061193163Sdfr * addition, only a single top-level vdev is allowed and none of the 3062193163Sdfr * leaves can be wholedisks. 3063193163Sdfr * 3064193163Sdfr * For FreeBSD, we can boot from any configuration. There is a 3065193163Sdfr * limitation that the boot filesystem must be either uncompressed or 3066193163Sdfr * compresses with lzjb compression but I'm not sure how to enforce 3067193163Sdfr * that here. 3068185029Spjd */ 3069185029Spjdboolean_t 3070185029Spjdvdev_is_bootable(vdev_t *vd) 3071185029Spjd{ 3072213197Smm#ifdef sun 3073185029Spjd if (!vd->vdev_ops->vdev_op_leaf) { 3074185029Spjd char *vdev_type = vd->vdev_ops->vdev_op_type; 3075185029Spjd 3076185029Spjd if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 && 3077185029Spjd vd->vdev_children > 1) { 3078185029Spjd return (B_FALSE); 3079185029Spjd } else if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 || 3080185029Spjd strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) { 3081185029Spjd return (B_FALSE); 3082185029Spjd } 3083185029Spjd } else if (vd->vdev_wholedisk == 1) { 3084185029Spjd return (B_FALSE); 3085185029Spjd } 3086185029Spjd 3087219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 3088185029Spjd if (!vdev_is_bootable(vd->vdev_child[c])) 3089185029Spjd return (B_FALSE); 3090185029Spjd } 3091213197Smm#endif /* sun */ 3092185029Spjd return (B_TRUE); 3093168404Spjd} 3094213197Smm 3095219089Spjd/* 3096219089Spjd * Load the state from the original vdev tree (ovd) which 3097219089Spjd * we've retrieved from the MOS config object. If the original 3098219089Spjd * vdev was offline or faulted then we transfer that state to the 3099219089Spjd * device in the current vdev tree (nvd). 3100219089Spjd */ 3101213197Smmvoid 3102219089Spjdvdev_load_log_state(vdev_t *nvd, vdev_t *ovd) 3103213197Smm{ 3104219089Spjd spa_t *spa = nvd->vdev_spa; 3105213197Smm 3106219089Spjd ASSERT(nvd->vdev_top->vdev_islog); 3107219089Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 3108219089Spjd ASSERT3U(nvd->vdev_guid, ==, ovd->vdev_guid); 3109213197Smm 3110219089Spjd for (int c = 0; c < nvd->vdev_children; c++) 3111219089Spjd vdev_load_log_state(nvd->vdev_child[c], ovd->vdev_child[c]); 3112213197Smm 3113219089Spjd if (nvd->vdev_ops->vdev_op_leaf) { 3114213197Smm /* 3115219089Spjd * Restore the persistent vdev state 3116213197Smm */ 3117219089Spjd nvd->vdev_offline = ovd->vdev_offline; 3118219089Spjd nvd->vdev_faulted = ovd->vdev_faulted; 3119219089Spjd nvd->vdev_degraded = ovd->vdev_degraded; 3120219089Spjd nvd->vdev_removed = ovd->vdev_removed; 3121213197Smm } 3122213197Smm} 3123219089Spjd 3124219089Spjd/* 3125219089Spjd * Determine if a log device has valid content. If the vdev was 3126219089Spjd * removed or faulted in the MOS config then we know that 3127219089Spjd * the content on the log device has already been written to the pool. 3128219089Spjd */ 3129219089Spjdboolean_t 3130219089Spjdvdev_log_state_valid(vdev_t *vd) 3131219089Spjd{ 3132219089Spjd if (vd->vdev_ops->vdev_op_leaf && !vd->vdev_faulted && 3133219089Spjd !vd->vdev_removed) 3134219089Spjd return (B_TRUE); 3135219089Spjd 3136219089Spjd for (int c = 0; c < vd->vdev_children; c++) 3137219089Spjd if (vdev_log_state_valid(vd->vdev_child[c])) 3138219089Spjd return (B_TRUE); 3139219089Spjd 3140219089Spjd return (B_FALSE); 3141219089Spjd} 3142219089Spjd 3143219089Spjd/* 3144219089Spjd * Expand a vdev if possible. 3145219089Spjd */ 3146219089Spjdvoid 3147219089Spjdvdev_expand(vdev_t *vd, uint64_t txg) 3148219089Spjd{ 3149219089Spjd ASSERT(vd->vdev_top == vd); 3150219089Spjd ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3151219089Spjd 3152219089Spjd if ((vd->vdev_asize >> vd->vdev_ms_shift) > vd->vdev_ms_count) { 3153219089Spjd VERIFY(vdev_metaslab_init(vd, txg) == 0); 3154219089Spjd vdev_config_dirty(vd); 3155219089Spjd } 3156219089Spjd} 3157219089Spjd 3158219089Spjd/* 3159219089Spjd * Split a vdev. 3160219089Spjd */ 3161219089Spjdvoid 3162219089Spjdvdev_split(vdev_t *vd) 3163219089Spjd{ 3164219089Spjd vdev_t *cvd, *pvd = vd->vdev_parent; 3165219089Spjd 3166219089Spjd vdev_remove_child(pvd, vd); 3167219089Spjd vdev_compact_children(pvd); 3168219089Spjd 3169219089Spjd cvd = pvd->vdev_child[0]; 3170219089Spjd if (pvd->vdev_children == 1) { 3171219089Spjd vdev_remove_parent(cvd); 3172219089Spjd cvd->vdev_splitting = B_TRUE; 3173219089Spjd } 3174219089Spjd vdev_propagate_state(cvd); 3175219089Spjd} 3176247265Smm 3177247265Smmvoid 3178247265Smmvdev_deadman(vdev_t *vd) 3179247265Smm{ 3180247265Smm for (int c = 0; c < vd->vdev_children; c++) { 3181247265Smm vdev_t *cvd = vd->vdev_child[c]; 3182247265Smm 3183247265Smm vdev_deadman(cvd); 3184247265Smm } 3185247265Smm 3186247265Smm if (vd->vdev_ops->vdev_op_leaf) { 3187247265Smm vdev_queue_t *vq = &vd->vdev_queue; 3188247265Smm 3189247265Smm mutex_enter(&vq->vq_lock); 3190247265Smm if (avl_numnodes(&vq->vq_pending_tree) > 0) { 3191247265Smm spa_t *spa = vd->vdev_spa; 3192247265Smm zio_t *fio; 3193247265Smm uint64_t delta; 3194247265Smm 3195247265Smm /* 3196247265Smm * Look at the head of all the pending queues, 3197247265Smm * if any I/O has been outstanding for longer than 3198247265Smm * the spa_deadman_synctime we panic the system. 3199247265Smm */ 3200247265Smm fio = avl_first(&vq->vq_pending_tree); 3201247265Smm delta = ddi_get_lbolt64() - fio->io_timestamp; 3202247265Smm if (delta > NSEC_TO_TICK(spa_deadman_synctime(spa))) { 3203247265Smm zfs_dbgmsg("SLOW IO: zio timestamp %llu, " 3204247265Smm "delta %llu, last io %llu", 3205247265Smm fio->io_timestamp, delta, 3206247265Smm vq->vq_io_complete_ts); 3207247265Smm fm_panic("I/O to pool '%s' appears to be " 3208247265Smm "hung.", spa_name(spa)); 3209247265Smm } 3210247265Smm } 3211247265Smm mutex_exit(&vq->vq_lock); 3212247265Smm } 3213247265Smm} 3214