vdev.c revision 253991
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. 25249195Smm * Copyright (c) 2013 by Delphix. All rights reserved. 26247348Smm * Copyright 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 27168404Spjd */ 28168404Spjd 29168404Spjd#include <sys/zfs_context.h> 30168404Spjd#include <sys/fm/fs/zfs.h> 31168404Spjd#include <sys/spa.h> 32168404Spjd#include <sys/spa_impl.h> 33168404Spjd#include <sys/dmu.h> 34168404Spjd#include <sys/dmu_tx.h> 35168404Spjd#include <sys/vdev_impl.h> 36168404Spjd#include <sys/uberblock_impl.h> 37168404Spjd#include <sys/metaslab.h> 38168404Spjd#include <sys/metaslab_impl.h> 39168404Spjd#include <sys/space_map.h> 40168404Spjd#include <sys/zio.h> 41168404Spjd#include <sys/zap.h> 42168404Spjd#include <sys/fs/zfs.h> 43185029Spjd#include <sys/arc.h> 44213197Smm#include <sys/zil.h> 45219089Spjd#include <sys/dsl_scan.h> 46240868Spjd#include <sys/trim_map.h> 47168404Spjd 48168404SpjdSYSCTL_DECL(_vfs_zfs); 49168404SpjdSYSCTL_NODE(_vfs_zfs, OID_AUTO, vdev, CTLFLAG_RW, 0, "ZFS VDEV"); 50168404Spjd 51168404Spjd/* 52168404Spjd * Virtual device management. 53168404Spjd */ 54168404Spjd 55168404Spjdstatic vdev_ops_t *vdev_ops_table[] = { 56168404Spjd &vdev_root_ops, 57168404Spjd &vdev_raidz_ops, 58168404Spjd &vdev_mirror_ops, 59168404Spjd &vdev_replacing_ops, 60168404Spjd &vdev_spare_ops, 61168404Spjd#ifdef _KERNEL 62168404Spjd &vdev_geom_ops, 63168404Spjd#else 64168404Spjd &vdev_disk_ops, 65185029Spjd#endif 66168404Spjd &vdev_file_ops, 67168404Spjd &vdev_missing_ops, 68219089Spjd &vdev_hole_ops, 69168404Spjd NULL 70168404Spjd}; 71168404Spjd 72168404Spjd 73168404Spjd/* 74168404Spjd * Given a vdev type, return the appropriate ops vector. 75168404Spjd */ 76168404Spjdstatic vdev_ops_t * 77168404Spjdvdev_getops(const char *type) 78168404Spjd{ 79168404Spjd vdev_ops_t *ops, **opspp; 80168404Spjd 81168404Spjd for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) 82168404Spjd if (strcmp(ops->vdev_op_type, type) == 0) 83168404Spjd break; 84168404Spjd 85168404Spjd return (ops); 86168404Spjd} 87168404Spjd 88168404Spjd/* 89168404Spjd * Default asize function: return the MAX of psize with the asize of 90168404Spjd * all children. This is what's used by anything other than RAID-Z. 91168404Spjd */ 92168404Spjduint64_t 93168404Spjdvdev_default_asize(vdev_t *vd, uint64_t psize) 94168404Spjd{ 95168404Spjd uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); 96168404Spjd uint64_t csize; 97168404Spjd 98219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 99168404Spjd csize = vdev_psize_to_asize(vd->vdev_child[c], psize); 100168404Spjd asize = MAX(asize, csize); 101168404Spjd } 102168404Spjd 103168404Spjd return (asize); 104168404Spjd} 105168404Spjd 106168404Spjd/* 107219089Spjd * Get the minimum allocatable size. We define the allocatable size as 108219089Spjd * the vdev's asize rounded to the nearest metaslab. This allows us to 109219089Spjd * replace or attach devices which don't have the same physical size but 110219089Spjd * can still satisfy the same number of allocations. 111168404Spjd */ 112168404Spjduint64_t 113219089Spjdvdev_get_min_asize(vdev_t *vd) 114168404Spjd{ 115219089Spjd vdev_t *pvd = vd->vdev_parent; 116168404Spjd 117219089Spjd /* 118236155Smm * If our parent is NULL (inactive spare or cache) or is the root, 119219089Spjd * just return our own asize. 120219089Spjd */ 121219089Spjd if (pvd == NULL) 122219089Spjd return (vd->vdev_asize); 123168404Spjd 124168404Spjd /* 125219089Spjd * The top-level vdev just returns the allocatable size rounded 126219089Spjd * to the nearest metaslab. 127168404Spjd */ 128219089Spjd if (vd == vd->vdev_top) 129219089Spjd return (P2ALIGN(vd->vdev_asize, 1ULL << vd->vdev_ms_shift)); 130168404Spjd 131219089Spjd /* 132219089Spjd * The allocatable space for a raidz vdev is N * sizeof(smallest child), 133219089Spjd * so each child must provide at least 1/Nth of its asize. 134219089Spjd */ 135219089Spjd if (pvd->vdev_ops == &vdev_raidz_ops) 136219089Spjd return (pvd->vdev_min_asize / pvd->vdev_children); 137168404Spjd 138219089Spjd return (pvd->vdev_min_asize); 139219089Spjd} 140168404Spjd 141219089Spjdvoid 142219089Spjdvdev_set_min_asize(vdev_t *vd) 143219089Spjd{ 144219089Spjd vd->vdev_min_asize = vdev_get_min_asize(vd); 145219089Spjd 146219089Spjd for (int c = 0; c < vd->vdev_children; c++) 147219089Spjd vdev_set_min_asize(vd->vdev_child[c]); 148168404Spjd} 149168404Spjd 150168404Spjdvdev_t * 151168404Spjdvdev_lookup_top(spa_t *spa, uint64_t vdev) 152168404Spjd{ 153168404Spjd vdev_t *rvd = spa->spa_root_vdev; 154168404Spjd 155185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 156185029Spjd 157185029Spjd if (vdev < rvd->vdev_children) { 158185029Spjd ASSERT(rvd->vdev_child[vdev] != NULL); 159168404Spjd return (rvd->vdev_child[vdev]); 160185029Spjd } 161168404Spjd 162168404Spjd return (NULL); 163168404Spjd} 164168404Spjd 165168404Spjdvdev_t * 166168404Spjdvdev_lookup_by_guid(vdev_t *vd, uint64_t guid) 167168404Spjd{ 168168404Spjd vdev_t *mvd; 169168404Spjd 170168404Spjd if (vd->vdev_guid == guid) 171168404Spjd return (vd); 172168404Spjd 173219089Spjd for (int c = 0; c < vd->vdev_children; c++) 174168404Spjd if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != 175168404Spjd NULL) 176168404Spjd return (mvd); 177168404Spjd 178168404Spjd return (NULL); 179168404Spjd} 180168404Spjd 181168404Spjdvoid 182168404Spjdvdev_add_child(vdev_t *pvd, vdev_t *cvd) 183168404Spjd{ 184168404Spjd size_t oldsize, newsize; 185168404Spjd uint64_t id = cvd->vdev_id; 186168404Spjd vdev_t **newchild; 187168404Spjd 188185029Spjd ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 189168404Spjd ASSERT(cvd->vdev_parent == NULL); 190168404Spjd 191168404Spjd cvd->vdev_parent = pvd; 192168404Spjd 193168404Spjd if (pvd == NULL) 194168404Spjd return; 195168404Spjd 196168404Spjd ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); 197168404Spjd 198168404Spjd oldsize = pvd->vdev_children * sizeof (vdev_t *); 199168404Spjd pvd->vdev_children = MAX(pvd->vdev_children, id + 1); 200168404Spjd newsize = pvd->vdev_children * sizeof (vdev_t *); 201168404Spjd 202168404Spjd newchild = kmem_zalloc(newsize, KM_SLEEP); 203168404Spjd if (pvd->vdev_child != NULL) { 204168404Spjd bcopy(pvd->vdev_child, newchild, oldsize); 205168404Spjd kmem_free(pvd->vdev_child, oldsize); 206168404Spjd } 207168404Spjd 208168404Spjd pvd->vdev_child = newchild; 209168404Spjd pvd->vdev_child[id] = cvd; 210168404Spjd 211168404Spjd cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); 212168404Spjd ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); 213168404Spjd 214168404Spjd /* 215168404Spjd * Walk up all ancestors to update guid sum. 216168404Spjd */ 217168404Spjd for (; pvd != NULL; pvd = pvd->vdev_parent) 218168404Spjd pvd->vdev_guid_sum += cvd->vdev_guid_sum; 219168404Spjd} 220168404Spjd 221168404Spjdvoid 222168404Spjdvdev_remove_child(vdev_t *pvd, vdev_t *cvd) 223168404Spjd{ 224168404Spjd int c; 225168404Spjd uint_t id = cvd->vdev_id; 226168404Spjd 227168404Spjd ASSERT(cvd->vdev_parent == pvd); 228168404Spjd 229168404Spjd if (pvd == NULL) 230168404Spjd return; 231168404Spjd 232168404Spjd ASSERT(id < pvd->vdev_children); 233168404Spjd ASSERT(pvd->vdev_child[id] == cvd); 234168404Spjd 235168404Spjd pvd->vdev_child[id] = NULL; 236168404Spjd cvd->vdev_parent = NULL; 237168404Spjd 238168404Spjd for (c = 0; c < pvd->vdev_children; c++) 239168404Spjd if (pvd->vdev_child[c]) 240168404Spjd break; 241168404Spjd 242168404Spjd if (c == pvd->vdev_children) { 243168404Spjd kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); 244168404Spjd pvd->vdev_child = NULL; 245168404Spjd pvd->vdev_children = 0; 246168404Spjd } 247168404Spjd 248168404Spjd /* 249168404Spjd * Walk up all ancestors to update guid sum. 250168404Spjd */ 251168404Spjd for (; pvd != NULL; pvd = pvd->vdev_parent) 252168404Spjd pvd->vdev_guid_sum -= cvd->vdev_guid_sum; 253168404Spjd} 254168404Spjd 255168404Spjd/* 256168404Spjd * Remove any holes in the child array. 257168404Spjd */ 258168404Spjdvoid 259168404Spjdvdev_compact_children(vdev_t *pvd) 260168404Spjd{ 261168404Spjd vdev_t **newchild, *cvd; 262168404Spjd int oldc = pvd->vdev_children; 263219089Spjd int newc; 264168404Spjd 265185029Spjd ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 266168404Spjd 267219089Spjd for (int c = newc = 0; c < oldc; c++) 268168404Spjd if (pvd->vdev_child[c]) 269168404Spjd newc++; 270168404Spjd 271168404Spjd newchild = kmem_alloc(newc * sizeof (vdev_t *), KM_SLEEP); 272168404Spjd 273219089Spjd for (int c = newc = 0; c < oldc; c++) { 274168404Spjd if ((cvd = pvd->vdev_child[c]) != NULL) { 275168404Spjd newchild[newc] = cvd; 276168404Spjd cvd->vdev_id = newc++; 277168404Spjd } 278168404Spjd } 279168404Spjd 280168404Spjd kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); 281168404Spjd pvd->vdev_child = newchild; 282168404Spjd pvd->vdev_children = newc; 283168404Spjd} 284168404Spjd 285168404Spjd/* 286168404Spjd * Allocate and minimally initialize a vdev_t. 287168404Spjd */ 288219089Spjdvdev_t * 289168404Spjdvdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) 290168404Spjd{ 291168404Spjd vdev_t *vd; 292168404Spjd 293168404Spjd vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP); 294168404Spjd 295168404Spjd if (spa->spa_root_vdev == NULL) { 296168404Spjd ASSERT(ops == &vdev_root_ops); 297168404Spjd spa->spa_root_vdev = vd; 298228103Smm spa->spa_load_guid = spa_generate_guid(NULL); 299168404Spjd } 300168404Spjd 301219089Spjd if (guid == 0 && ops != &vdev_hole_ops) { 302168404Spjd if (spa->spa_root_vdev == vd) { 303168404Spjd /* 304168404Spjd * The root vdev's guid will also be the pool guid, 305168404Spjd * which must be unique among all pools. 306168404Spjd */ 307219089Spjd guid = spa_generate_guid(NULL); 308168404Spjd } else { 309168404Spjd /* 310168404Spjd * Any other vdev's guid must be unique within the pool. 311168404Spjd */ 312219089Spjd guid = spa_generate_guid(spa); 313168404Spjd } 314168404Spjd ASSERT(!spa_guid_exists(spa_guid(spa), guid)); 315168404Spjd } 316168404Spjd 317168404Spjd vd->vdev_spa = spa; 318168404Spjd vd->vdev_id = id; 319168404Spjd vd->vdev_guid = guid; 320168404Spjd vd->vdev_guid_sum = guid; 321168404Spjd vd->vdev_ops = ops; 322168404Spjd vd->vdev_state = VDEV_STATE_CLOSED; 323219089Spjd vd->vdev_ishole = (ops == &vdev_hole_ops); 324168404Spjd 325168404Spjd mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_DEFAULT, NULL); 326168404Spjd mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); 327185029Spjd mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL); 328209962Smm for (int t = 0; t < DTL_TYPES; t++) { 329209962Smm space_map_create(&vd->vdev_dtl[t], 0, -1ULL, 0, 330209962Smm &vd->vdev_dtl_lock); 331209962Smm } 332168404Spjd txg_list_create(&vd->vdev_ms_list, 333168404Spjd offsetof(struct metaslab, ms_txg_node)); 334168404Spjd txg_list_create(&vd->vdev_dtl_list, 335168404Spjd offsetof(struct vdev, vdev_dtl_node)); 336168404Spjd vd->vdev_stat.vs_timestamp = gethrtime(); 337185029Spjd vdev_queue_init(vd); 338185029Spjd vdev_cache_init(vd); 339168404Spjd 340168404Spjd return (vd); 341168404Spjd} 342168404Spjd 343168404Spjd/* 344168404Spjd * Allocate a new vdev. The 'alloctype' is used to control whether we are 345168404Spjd * creating a new vdev or loading an existing one - the behavior is slightly 346168404Spjd * different for each case. 347168404Spjd */ 348168404Spjdint 349168404Spjdvdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, 350168404Spjd int alloctype) 351168404Spjd{ 352168404Spjd vdev_ops_t *ops; 353168404Spjd char *type; 354185029Spjd uint64_t guid = 0, islog, nparity; 355168404Spjd vdev_t *vd; 356168404Spjd 357185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 358168404Spjd 359168404Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) 360249195Smm return (SET_ERROR(EINVAL)); 361168404Spjd 362168404Spjd if ((ops = vdev_getops(type)) == NULL) 363249195Smm return (SET_ERROR(EINVAL)); 364168404Spjd 365168404Spjd /* 366168404Spjd * If this is a load, get the vdev guid from the nvlist. 367168404Spjd * Otherwise, vdev_alloc_common() will generate one for us. 368168404Spjd */ 369168404Spjd if (alloctype == VDEV_ALLOC_LOAD) { 370168404Spjd uint64_t label_id; 371168404Spjd 372168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || 373168404Spjd label_id != id) 374249195Smm return (SET_ERROR(EINVAL)); 375168404Spjd 376168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 377249195Smm return (SET_ERROR(EINVAL)); 378168404Spjd } else if (alloctype == VDEV_ALLOC_SPARE) { 379168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 380249195Smm return (SET_ERROR(EINVAL)); 381185029Spjd } else if (alloctype == VDEV_ALLOC_L2CACHE) { 382185029Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 383249195Smm return (SET_ERROR(EINVAL)); 384219089Spjd } else if (alloctype == VDEV_ALLOC_ROOTPOOL) { 385219089Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 386249195Smm return (SET_ERROR(EINVAL)); 387168404Spjd } 388168404Spjd 389168404Spjd /* 390168404Spjd * The first allocated vdev must be of type 'root'. 391168404Spjd */ 392168404Spjd if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) 393249195Smm return (SET_ERROR(EINVAL)); 394168404Spjd 395185029Spjd /* 396185029Spjd * Determine whether we're a log vdev. 397185029Spjd */ 398185029Spjd islog = 0; 399185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); 400185029Spjd if (islog && spa_version(spa) < SPA_VERSION_SLOGS) 401249195Smm return (SET_ERROR(ENOTSUP)); 402168404Spjd 403219089Spjd if (ops == &vdev_hole_ops && spa_version(spa) < SPA_VERSION_HOLES) 404249195Smm return (SET_ERROR(ENOTSUP)); 405219089Spjd 406168404Spjd /* 407185029Spjd * Set the nparity property for RAID-Z vdevs. 408168404Spjd */ 409185029Spjd nparity = -1ULL; 410168404Spjd if (ops == &vdev_raidz_ops) { 411168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, 412185029Spjd &nparity) == 0) { 413219089Spjd if (nparity == 0 || nparity > VDEV_RAIDZ_MAXPARITY) 414249195Smm return (SET_ERROR(EINVAL)); 415168404Spjd /* 416219089Spjd * Previous versions could only support 1 or 2 parity 417219089Spjd * device. 418168404Spjd */ 419219089Spjd if (nparity > 1 && 420219089Spjd spa_version(spa) < SPA_VERSION_RAIDZ2) 421249195Smm return (SET_ERROR(ENOTSUP)); 422219089Spjd if (nparity > 2 && 423219089Spjd spa_version(spa) < SPA_VERSION_RAIDZ3) 424249195Smm return (SET_ERROR(ENOTSUP)); 425168404Spjd } else { 426168404Spjd /* 427168404Spjd * We require the parity to be specified for SPAs that 428168404Spjd * support multiple parity levels. 429168404Spjd */ 430219089Spjd if (spa_version(spa) >= SPA_VERSION_RAIDZ2) 431249195Smm return (SET_ERROR(EINVAL)); 432168404Spjd /* 433168404Spjd * Otherwise, we default to 1 parity device for RAID-Z. 434168404Spjd */ 435185029Spjd nparity = 1; 436168404Spjd } 437168404Spjd } else { 438185029Spjd nparity = 0; 439168404Spjd } 440185029Spjd ASSERT(nparity != -1ULL); 441168404Spjd 442185029Spjd vd = vdev_alloc_common(spa, id, guid, ops); 443185029Spjd 444185029Spjd vd->vdev_islog = islog; 445185029Spjd vd->vdev_nparity = nparity; 446185029Spjd 447185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) 448185029Spjd vd->vdev_path = spa_strdup(vd->vdev_path); 449185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) 450185029Spjd vd->vdev_devid = spa_strdup(vd->vdev_devid); 451185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, 452185029Spjd &vd->vdev_physpath) == 0) 453185029Spjd vd->vdev_physpath = spa_strdup(vd->vdev_physpath); 454209962Smm if (nvlist_lookup_string(nv, ZPOOL_CONFIG_FRU, &vd->vdev_fru) == 0) 455209962Smm vd->vdev_fru = spa_strdup(vd->vdev_fru); 456185029Spjd 457168404Spjd /* 458168404Spjd * Set the whole_disk property. If it's not specified, leave the value 459168404Spjd * as -1. 460168404Spjd */ 461168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, 462168404Spjd &vd->vdev_wholedisk) != 0) 463168404Spjd vd->vdev_wholedisk = -1ULL; 464168404Spjd 465168404Spjd /* 466168404Spjd * Look for the 'not present' flag. This will only be set if the device 467168404Spjd * was not present at the time of import. 468168404Spjd */ 469209962Smm (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, 470209962Smm &vd->vdev_not_present); 471168404Spjd 472168404Spjd /* 473168404Spjd * Get the alignment requirement. 474168404Spjd */ 475168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); 476168404Spjd 477168404Spjd /* 478219089Spjd * Retrieve the vdev creation time. 479219089Spjd */ 480219089Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_CREATE_TXG, 481219089Spjd &vd->vdev_crtxg); 482219089Spjd 483219089Spjd /* 484168404Spjd * If we're a top-level vdev, try to load the allocation parameters. 485168404Spjd */ 486219089Spjd if (parent && !parent->vdev_parent && 487219089Spjd (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) { 488168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, 489168404Spjd &vd->vdev_ms_array); 490168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, 491168404Spjd &vd->vdev_ms_shift); 492168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, 493168404Spjd &vd->vdev_asize); 494219089Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVING, 495219089Spjd &vd->vdev_removing); 496168404Spjd } 497168404Spjd 498230514Smm if (parent && !parent->vdev_parent && alloctype != VDEV_ALLOC_ATTACH) { 499219089Spjd ASSERT(alloctype == VDEV_ALLOC_LOAD || 500219089Spjd alloctype == VDEV_ALLOC_ADD || 501219089Spjd alloctype == VDEV_ALLOC_SPLIT || 502219089Spjd alloctype == VDEV_ALLOC_ROOTPOOL); 503219089Spjd vd->vdev_mg = metaslab_group_create(islog ? 504219089Spjd spa_log_class(spa) : spa_normal_class(spa), vd); 505219089Spjd } 506219089Spjd 507168404Spjd /* 508185029Spjd * If we're a leaf vdev, try to load the DTL object and other state. 509168404Spjd */ 510185029Spjd if (vd->vdev_ops->vdev_op_leaf && 511219089Spjd (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE || 512219089Spjd alloctype == VDEV_ALLOC_ROOTPOOL)) { 513185029Spjd if (alloctype == VDEV_ALLOC_LOAD) { 514185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, 515209962Smm &vd->vdev_dtl_smo.smo_object); 516185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, 517185029Spjd &vd->vdev_unspare); 518185029Spjd } 519219089Spjd 520219089Spjd if (alloctype == VDEV_ALLOC_ROOTPOOL) { 521219089Spjd uint64_t spare = 0; 522219089Spjd 523219089Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE, 524219089Spjd &spare) == 0 && spare) 525219089Spjd spa_spare_add(vd); 526219089Spjd } 527219089Spjd 528168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, 529168404Spjd &vd->vdev_offline); 530185029Spjd 531219089Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_RESILVERING, 532219089Spjd &vd->vdev_resilvering); 533219089Spjd 534185029Spjd /* 535185029Spjd * When importing a pool, we want to ignore the persistent fault 536185029Spjd * state, as the diagnosis made on another system may not be 537219089Spjd * valid in the current context. Local vdevs will 538219089Spjd * remain in the faulted state. 539185029Spjd */ 540219089Spjd if (spa_load_state(spa) == SPA_LOAD_OPEN) { 541185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, 542185029Spjd &vd->vdev_faulted); 543185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, 544185029Spjd &vd->vdev_degraded); 545185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, 546185029Spjd &vd->vdev_removed); 547219089Spjd 548219089Spjd if (vd->vdev_faulted || vd->vdev_degraded) { 549219089Spjd char *aux; 550219089Spjd 551219089Spjd vd->vdev_label_aux = 552219089Spjd VDEV_AUX_ERR_EXCEEDED; 553219089Spjd if (nvlist_lookup_string(nv, 554219089Spjd ZPOOL_CONFIG_AUX_STATE, &aux) == 0 && 555219089Spjd strcmp(aux, "external") == 0) 556219089Spjd vd->vdev_label_aux = VDEV_AUX_EXTERNAL; 557219089Spjd } 558185029Spjd } 559168404Spjd } 560168404Spjd 561168404Spjd /* 562168404Spjd * Add ourselves to the parent's list of children. 563168404Spjd */ 564168404Spjd vdev_add_child(parent, vd); 565168404Spjd 566168404Spjd *vdp = vd; 567168404Spjd 568168404Spjd return (0); 569168404Spjd} 570168404Spjd 571168404Spjdvoid 572168404Spjdvdev_free(vdev_t *vd) 573168404Spjd{ 574185029Spjd spa_t *spa = vd->vdev_spa; 575168404Spjd 576168404Spjd /* 577168404Spjd * vdev_free() implies closing the vdev first. This is simpler than 578168404Spjd * trying to ensure complicated semantics for all callers. 579168404Spjd */ 580168404Spjd vdev_close(vd); 581168404Spjd 582185029Spjd ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); 583219089Spjd ASSERT(!list_link_active(&vd->vdev_state_dirty_node)); 584168404Spjd 585168404Spjd /* 586168404Spjd * Free all children. 587168404Spjd */ 588219089Spjd for (int c = 0; c < vd->vdev_children; c++) 589168404Spjd vdev_free(vd->vdev_child[c]); 590168404Spjd 591168404Spjd ASSERT(vd->vdev_child == NULL); 592168404Spjd ASSERT(vd->vdev_guid_sum == vd->vdev_guid); 593168404Spjd 594168404Spjd /* 595168404Spjd * Discard allocation state. 596168404Spjd */ 597219089Spjd if (vd->vdev_mg != NULL) { 598168404Spjd vdev_metaslab_fini(vd); 599219089Spjd metaslab_group_destroy(vd->vdev_mg); 600219089Spjd } 601168404Spjd 602240415Smm ASSERT0(vd->vdev_stat.vs_space); 603240415Smm ASSERT0(vd->vdev_stat.vs_dspace); 604240415Smm ASSERT0(vd->vdev_stat.vs_alloc); 605168404Spjd 606168404Spjd /* 607168404Spjd * Remove this vdev from its parent's child list. 608168404Spjd */ 609168404Spjd vdev_remove_child(vd->vdev_parent, vd); 610168404Spjd 611168404Spjd ASSERT(vd->vdev_parent == NULL); 612168404Spjd 613185029Spjd /* 614185029Spjd * Clean up vdev structure. 615185029Spjd */ 616185029Spjd vdev_queue_fini(vd); 617185029Spjd vdev_cache_fini(vd); 618185029Spjd 619185029Spjd if (vd->vdev_path) 620185029Spjd spa_strfree(vd->vdev_path); 621185029Spjd if (vd->vdev_devid) 622185029Spjd spa_strfree(vd->vdev_devid); 623185029Spjd if (vd->vdev_physpath) 624185029Spjd spa_strfree(vd->vdev_physpath); 625209962Smm if (vd->vdev_fru) 626209962Smm spa_strfree(vd->vdev_fru); 627185029Spjd 628185029Spjd if (vd->vdev_isspare) 629185029Spjd spa_spare_remove(vd); 630185029Spjd if (vd->vdev_isl2cache) 631185029Spjd spa_l2cache_remove(vd); 632185029Spjd 633185029Spjd txg_list_destroy(&vd->vdev_ms_list); 634185029Spjd txg_list_destroy(&vd->vdev_dtl_list); 635209962Smm 636185029Spjd mutex_enter(&vd->vdev_dtl_lock); 637209962Smm for (int t = 0; t < DTL_TYPES; t++) { 638209962Smm space_map_unload(&vd->vdev_dtl[t]); 639209962Smm space_map_destroy(&vd->vdev_dtl[t]); 640209962Smm } 641185029Spjd mutex_exit(&vd->vdev_dtl_lock); 642209962Smm 643185029Spjd mutex_destroy(&vd->vdev_dtl_lock); 644185029Spjd mutex_destroy(&vd->vdev_stat_lock); 645185029Spjd mutex_destroy(&vd->vdev_probe_lock); 646185029Spjd 647185029Spjd if (vd == spa->spa_root_vdev) 648185029Spjd spa->spa_root_vdev = NULL; 649185029Spjd 650185029Spjd kmem_free(vd, sizeof (vdev_t)); 651168404Spjd} 652168404Spjd 653168404Spjd/* 654168404Spjd * Transfer top-level vdev state from svd to tvd. 655168404Spjd */ 656168404Spjdstatic void 657168404Spjdvdev_top_transfer(vdev_t *svd, vdev_t *tvd) 658168404Spjd{ 659168404Spjd spa_t *spa = svd->vdev_spa; 660168404Spjd metaslab_t *msp; 661168404Spjd vdev_t *vd; 662168404Spjd int t; 663168404Spjd 664168404Spjd ASSERT(tvd == tvd->vdev_top); 665168404Spjd 666168404Spjd tvd->vdev_ms_array = svd->vdev_ms_array; 667168404Spjd tvd->vdev_ms_shift = svd->vdev_ms_shift; 668168404Spjd tvd->vdev_ms_count = svd->vdev_ms_count; 669168404Spjd 670168404Spjd svd->vdev_ms_array = 0; 671168404Spjd svd->vdev_ms_shift = 0; 672168404Spjd svd->vdev_ms_count = 0; 673168404Spjd 674230514Smm if (tvd->vdev_mg) 675230514Smm ASSERT3P(tvd->vdev_mg, ==, svd->vdev_mg); 676168404Spjd tvd->vdev_mg = svd->vdev_mg; 677168404Spjd tvd->vdev_ms = svd->vdev_ms; 678168404Spjd 679168404Spjd svd->vdev_mg = NULL; 680168404Spjd svd->vdev_ms = NULL; 681168404Spjd 682168404Spjd if (tvd->vdev_mg != NULL) 683168404Spjd tvd->vdev_mg->mg_vd = tvd; 684168404Spjd 685168404Spjd tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; 686168404Spjd tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; 687168404Spjd tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; 688168404Spjd 689168404Spjd svd->vdev_stat.vs_alloc = 0; 690168404Spjd svd->vdev_stat.vs_space = 0; 691168404Spjd svd->vdev_stat.vs_dspace = 0; 692168404Spjd 693168404Spjd for (t = 0; t < TXG_SIZE; t++) { 694168404Spjd while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) 695168404Spjd (void) txg_list_add(&tvd->vdev_ms_list, msp, t); 696168404Spjd while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) 697168404Spjd (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); 698168404Spjd if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) 699168404Spjd (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); 700168404Spjd } 701168404Spjd 702185029Spjd if (list_link_active(&svd->vdev_config_dirty_node)) { 703168404Spjd vdev_config_clean(svd); 704168404Spjd vdev_config_dirty(tvd); 705168404Spjd } 706168404Spjd 707185029Spjd if (list_link_active(&svd->vdev_state_dirty_node)) { 708185029Spjd vdev_state_clean(svd); 709185029Spjd vdev_state_dirty(tvd); 710185029Spjd } 711168404Spjd 712168404Spjd tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; 713168404Spjd svd->vdev_deflate_ratio = 0; 714185029Spjd 715185029Spjd tvd->vdev_islog = svd->vdev_islog; 716185029Spjd svd->vdev_islog = 0; 717168404Spjd} 718168404Spjd 719168404Spjdstatic void 720168404Spjdvdev_top_update(vdev_t *tvd, vdev_t *vd) 721168404Spjd{ 722168404Spjd if (vd == NULL) 723168404Spjd return; 724168404Spjd 725168404Spjd vd->vdev_top = tvd; 726168404Spjd 727219089Spjd for (int c = 0; c < vd->vdev_children; c++) 728168404Spjd vdev_top_update(tvd, vd->vdev_child[c]); 729168404Spjd} 730168404Spjd 731168404Spjd/* 732168404Spjd * Add a mirror/replacing vdev above an existing vdev. 733168404Spjd */ 734168404Spjdvdev_t * 735168404Spjdvdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) 736168404Spjd{ 737168404Spjd spa_t *spa = cvd->vdev_spa; 738168404Spjd vdev_t *pvd = cvd->vdev_parent; 739168404Spjd vdev_t *mvd; 740168404Spjd 741185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 742168404Spjd 743168404Spjd mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); 744168404Spjd 745168404Spjd mvd->vdev_asize = cvd->vdev_asize; 746219089Spjd mvd->vdev_min_asize = cvd->vdev_min_asize; 747236155Smm mvd->vdev_max_asize = cvd->vdev_max_asize; 748168404Spjd mvd->vdev_ashift = cvd->vdev_ashift; 749168404Spjd mvd->vdev_state = cvd->vdev_state; 750219089Spjd mvd->vdev_crtxg = cvd->vdev_crtxg; 751168404Spjd 752168404Spjd vdev_remove_child(pvd, cvd); 753168404Spjd vdev_add_child(pvd, mvd); 754168404Spjd cvd->vdev_id = mvd->vdev_children; 755168404Spjd vdev_add_child(mvd, cvd); 756168404Spjd vdev_top_update(cvd->vdev_top, cvd->vdev_top); 757168404Spjd 758168404Spjd if (mvd == mvd->vdev_top) 759168404Spjd vdev_top_transfer(cvd, mvd); 760168404Spjd 761168404Spjd return (mvd); 762168404Spjd} 763168404Spjd 764168404Spjd/* 765168404Spjd * Remove a 1-way mirror/replacing vdev from the tree. 766168404Spjd */ 767168404Spjdvoid 768168404Spjdvdev_remove_parent(vdev_t *cvd) 769168404Spjd{ 770168404Spjd vdev_t *mvd = cvd->vdev_parent; 771168404Spjd vdev_t *pvd = mvd->vdev_parent; 772168404Spjd 773185029Spjd ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 774168404Spjd 775168404Spjd ASSERT(mvd->vdev_children == 1); 776168404Spjd ASSERT(mvd->vdev_ops == &vdev_mirror_ops || 777168404Spjd mvd->vdev_ops == &vdev_replacing_ops || 778168404Spjd mvd->vdev_ops == &vdev_spare_ops); 779168404Spjd cvd->vdev_ashift = mvd->vdev_ashift; 780168404Spjd 781168404Spjd vdev_remove_child(mvd, cvd); 782168404Spjd vdev_remove_child(pvd, mvd); 783209962Smm 784185029Spjd /* 785185029Spjd * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. 786185029Spjd * Otherwise, we could have detached an offline device, and when we 787185029Spjd * go to import the pool we'll think we have two top-level vdevs, 788185029Spjd * instead of a different version of the same top-level vdev. 789185029Spjd */ 790209962Smm if (mvd->vdev_top == mvd) { 791209962Smm uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid; 792219089Spjd cvd->vdev_orig_guid = cvd->vdev_guid; 793209962Smm cvd->vdev_guid += guid_delta; 794209962Smm cvd->vdev_guid_sum += guid_delta; 795209962Smm } 796168404Spjd cvd->vdev_id = mvd->vdev_id; 797168404Spjd vdev_add_child(pvd, cvd); 798168404Spjd vdev_top_update(cvd->vdev_top, cvd->vdev_top); 799168404Spjd 800168404Spjd if (cvd == cvd->vdev_top) 801168404Spjd vdev_top_transfer(mvd, cvd); 802168404Spjd 803168404Spjd ASSERT(mvd->vdev_children == 0); 804168404Spjd vdev_free(mvd); 805168404Spjd} 806168404Spjd 807168404Spjdint 808168404Spjdvdev_metaslab_init(vdev_t *vd, uint64_t txg) 809168404Spjd{ 810168404Spjd spa_t *spa = vd->vdev_spa; 811168404Spjd objset_t *mos = spa->spa_meta_objset; 812168404Spjd uint64_t m; 813168404Spjd uint64_t oldc = vd->vdev_ms_count; 814168404Spjd uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; 815168404Spjd metaslab_t **mspp; 816168404Spjd int error; 817168404Spjd 818219089Spjd ASSERT(txg == 0 || spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 819219089Spjd 820219089Spjd /* 821219089Spjd * This vdev is not being allocated from yet or is a hole. 822219089Spjd */ 823219089Spjd if (vd->vdev_ms_shift == 0) 824168404Spjd return (0); 825168404Spjd 826219089Spjd ASSERT(!vd->vdev_ishole); 827219089Spjd 828213197Smm /* 829213197Smm * Compute the raidz-deflation ratio. Note, we hard-code 830213197Smm * in 128k (1 << 17) because it is the current "typical" blocksize. 831213197Smm * Even if SPA_MAXBLOCKSIZE changes, this algorithm must never change, 832213197Smm * or we will inconsistently account for existing bp's. 833213197Smm */ 834213197Smm vd->vdev_deflate_ratio = (1 << 17) / 835213197Smm (vdev_psize_to_asize(vd, 1 << 17) >> SPA_MINBLOCKSHIFT); 836213197Smm 837168404Spjd ASSERT(oldc <= newc); 838168404Spjd 839168404Spjd mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); 840168404Spjd 841168404Spjd if (oldc != 0) { 842168404Spjd bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); 843168404Spjd kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); 844168404Spjd } 845168404Spjd 846168404Spjd vd->vdev_ms = mspp; 847168404Spjd vd->vdev_ms_count = newc; 848168404Spjd 849168404Spjd for (m = oldc; m < newc; m++) { 850168404Spjd space_map_obj_t smo = { 0, 0, 0 }; 851168404Spjd if (txg == 0) { 852168404Spjd uint64_t object = 0; 853168404Spjd error = dmu_read(mos, vd->vdev_ms_array, 854209962Smm m * sizeof (uint64_t), sizeof (uint64_t), &object, 855209962Smm DMU_READ_PREFETCH); 856168404Spjd if (error) 857168404Spjd return (error); 858168404Spjd if (object != 0) { 859168404Spjd dmu_buf_t *db; 860168404Spjd error = dmu_bonus_hold(mos, object, FTAG, &db); 861168404Spjd if (error) 862168404Spjd return (error); 863185029Spjd ASSERT3U(db->db_size, >=, sizeof (smo)); 864185029Spjd bcopy(db->db_data, &smo, sizeof (smo)); 865168404Spjd ASSERT3U(smo.smo_object, ==, object); 866168404Spjd dmu_buf_rele(db, FTAG); 867168404Spjd } 868168404Spjd } 869168404Spjd vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, 870168404Spjd m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); 871168404Spjd } 872168404Spjd 873219089Spjd if (txg == 0) 874219089Spjd spa_config_enter(spa, SCL_ALLOC, FTAG, RW_WRITER); 875219089Spjd 876219089Spjd /* 877219089Spjd * If the vdev is being removed we don't activate 878219089Spjd * the metaslabs since we want to ensure that no new 879219089Spjd * allocations are performed on this device. 880219089Spjd */ 881219089Spjd if (oldc == 0 && !vd->vdev_removing) 882219089Spjd metaslab_group_activate(vd->vdev_mg); 883219089Spjd 884219089Spjd if (txg == 0) 885219089Spjd spa_config_exit(spa, SCL_ALLOC, FTAG); 886219089Spjd 887168404Spjd return (0); 888168404Spjd} 889168404Spjd 890168404Spjdvoid 891168404Spjdvdev_metaslab_fini(vdev_t *vd) 892168404Spjd{ 893168404Spjd uint64_t m; 894168404Spjd uint64_t count = vd->vdev_ms_count; 895168404Spjd 896168404Spjd if (vd->vdev_ms != NULL) { 897219089Spjd metaslab_group_passivate(vd->vdev_mg); 898168404Spjd for (m = 0; m < count; m++) 899168404Spjd if (vd->vdev_ms[m] != NULL) 900168404Spjd metaslab_fini(vd->vdev_ms[m]); 901168404Spjd kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); 902168404Spjd vd->vdev_ms = NULL; 903168404Spjd } 904168404Spjd} 905168404Spjd 906185029Spjdtypedef struct vdev_probe_stats { 907185029Spjd boolean_t vps_readable; 908185029Spjd boolean_t vps_writeable; 909185029Spjd int vps_flags; 910185029Spjd} vdev_probe_stats_t; 911185029Spjd 912185029Spjdstatic void 913185029Spjdvdev_probe_done(zio_t *zio) 914185029Spjd{ 915209962Smm spa_t *spa = zio->io_spa; 916209962Smm vdev_t *vd = zio->io_vd; 917185029Spjd vdev_probe_stats_t *vps = zio->io_private; 918185029Spjd 919209962Smm ASSERT(vd->vdev_probe_zio != NULL); 920209962Smm 921185029Spjd if (zio->io_type == ZIO_TYPE_READ) { 922185029Spjd if (zio->io_error == 0) 923185029Spjd vps->vps_readable = 1; 924209962Smm if (zio->io_error == 0 && spa_writeable(spa)) { 925209962Smm zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd, 926185029Spjd zio->io_offset, zio->io_size, zio->io_data, 927185029Spjd ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 928185029Spjd ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); 929185029Spjd } else { 930185029Spjd zio_buf_free(zio->io_data, zio->io_size); 931185029Spjd } 932185029Spjd } else if (zio->io_type == ZIO_TYPE_WRITE) { 933185029Spjd if (zio->io_error == 0) 934185029Spjd vps->vps_writeable = 1; 935185029Spjd zio_buf_free(zio->io_data, zio->io_size); 936185029Spjd } else if (zio->io_type == ZIO_TYPE_NULL) { 937209962Smm zio_t *pio; 938185029Spjd 939185029Spjd vd->vdev_cant_read |= !vps->vps_readable; 940185029Spjd vd->vdev_cant_write |= !vps->vps_writeable; 941185029Spjd 942185029Spjd if (vdev_readable(vd) && 943209962Smm (vdev_writeable(vd) || !spa_writeable(spa))) { 944185029Spjd zio->io_error = 0; 945185029Spjd } else { 946185029Spjd ASSERT(zio->io_error != 0); 947185029Spjd zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE, 948209962Smm spa, vd, NULL, 0, 0); 949249195Smm zio->io_error = SET_ERROR(ENXIO); 950185029Spjd } 951209962Smm 952209962Smm mutex_enter(&vd->vdev_probe_lock); 953209962Smm ASSERT(vd->vdev_probe_zio == zio); 954209962Smm vd->vdev_probe_zio = NULL; 955209962Smm mutex_exit(&vd->vdev_probe_lock); 956209962Smm 957209962Smm while ((pio = zio_walk_parents(zio)) != NULL) 958209962Smm if (!vdev_accessible(vd, pio)) 959249195Smm pio->io_error = SET_ERROR(ENXIO); 960209962Smm 961185029Spjd kmem_free(vps, sizeof (*vps)); 962185029Spjd } 963185029Spjd} 964185029Spjd 965168404Spjd/* 966251631Sdelphij * Determine whether this device is accessible. 967251631Sdelphij * 968251631Sdelphij * Read and write to several known locations: the pad regions of each 969251631Sdelphij * vdev label but the first, which we leave alone in case it contains 970251631Sdelphij * a VTOC. 971185029Spjd */ 972185029Spjdzio_t * 973209962Smmvdev_probe(vdev_t *vd, zio_t *zio) 974185029Spjd{ 975185029Spjd spa_t *spa = vd->vdev_spa; 976209962Smm vdev_probe_stats_t *vps = NULL; 977209962Smm zio_t *pio; 978185029Spjd 979209962Smm ASSERT(vd->vdev_ops->vdev_op_leaf); 980185029Spjd 981209962Smm /* 982209962Smm * Don't probe the probe. 983209962Smm */ 984209962Smm if (zio && (zio->io_flags & ZIO_FLAG_PROBE)) 985209962Smm return (NULL); 986185029Spjd 987209962Smm /* 988209962Smm * To prevent 'probe storms' when a device fails, we create 989209962Smm * just one probe i/o at a time. All zios that want to probe 990209962Smm * this vdev will become parents of the probe io. 991209962Smm */ 992209962Smm mutex_enter(&vd->vdev_probe_lock); 993209962Smm 994209962Smm if ((pio = vd->vdev_probe_zio) == NULL) { 995209962Smm vps = kmem_zalloc(sizeof (*vps), KM_SLEEP); 996209962Smm 997209962Smm vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | 998209962Smm ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | 999213198Smm ZIO_FLAG_TRYHARD; 1000209962Smm 1001209962Smm if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { 1002209962Smm /* 1003209962Smm * vdev_cant_read and vdev_cant_write can only 1004209962Smm * transition from TRUE to FALSE when we have the 1005209962Smm * SCL_ZIO lock as writer; otherwise they can only 1006209962Smm * transition from FALSE to TRUE. This ensures that 1007209962Smm * any zio looking at these values can assume that 1008209962Smm * failures persist for the life of the I/O. That's 1009209962Smm * important because when a device has intermittent 1010209962Smm * connectivity problems, we want to ensure that 1011209962Smm * they're ascribed to the device (ENXIO) and not 1012209962Smm * the zio (EIO). 1013209962Smm * 1014209962Smm * Since we hold SCL_ZIO as writer here, clear both 1015209962Smm * values so the probe can reevaluate from first 1016209962Smm * principles. 1017209962Smm */ 1018209962Smm vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; 1019209962Smm vd->vdev_cant_read = B_FALSE; 1020209962Smm vd->vdev_cant_write = B_FALSE; 1021209962Smm } 1022209962Smm 1023209962Smm vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd, 1024209962Smm vdev_probe_done, vps, 1025209962Smm vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE); 1026209962Smm 1027219089Spjd /* 1028219089Spjd * We can't change the vdev state in this context, so we 1029219089Spjd * kick off an async task to do it on our behalf. 1030219089Spjd */ 1031209962Smm if (zio != NULL) { 1032209962Smm vd->vdev_probe_wanted = B_TRUE; 1033209962Smm spa_async_request(spa, SPA_ASYNC_PROBE); 1034209962Smm } 1035185029Spjd } 1036185029Spjd 1037209962Smm if (zio != NULL) 1038209962Smm zio_add_child(zio, pio); 1039185029Spjd 1040209962Smm mutex_exit(&vd->vdev_probe_lock); 1041185029Spjd 1042209962Smm if (vps == NULL) { 1043209962Smm ASSERT(zio != NULL); 1044209962Smm return (NULL); 1045209962Smm } 1046185029Spjd 1047185029Spjd for (int l = 1; l < VDEV_LABELS; l++) { 1048209962Smm zio_nowait(zio_read_phys(pio, vd, 1049185029Spjd vdev_label_offset(vd->vdev_psize, l, 1050209962Smm offsetof(vdev_label_t, vl_pad2)), 1051209962Smm VDEV_PAD_SIZE, zio_buf_alloc(VDEV_PAD_SIZE), 1052185029Spjd ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 1053185029Spjd ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); 1054185029Spjd } 1055185029Spjd 1056209962Smm if (zio == NULL) 1057209962Smm return (pio); 1058209962Smm 1059209962Smm zio_nowait(pio); 1060209962Smm return (NULL); 1061185029Spjd} 1062185029Spjd 1063219089Spjdstatic void 1064219089Spjdvdev_open_child(void *arg) 1065219089Spjd{ 1066219089Spjd vdev_t *vd = arg; 1067219089Spjd 1068219089Spjd vd->vdev_open_thread = curthread; 1069219089Spjd vd->vdev_open_error = vdev_open(vd); 1070219089Spjd vd->vdev_open_thread = NULL; 1071219089Spjd} 1072219089Spjd 1073219089Spjdboolean_t 1074219089Spjdvdev_uses_zvols(vdev_t *vd) 1075219089Spjd{ 1076219089Spjd if (vd->vdev_path && strncmp(vd->vdev_path, ZVOL_DIR, 1077219089Spjd strlen(ZVOL_DIR)) == 0) 1078219089Spjd return (B_TRUE); 1079219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1080219089Spjd if (vdev_uses_zvols(vd->vdev_child[c])) 1081219089Spjd return (B_TRUE); 1082219089Spjd return (B_FALSE); 1083219089Spjd} 1084219089Spjd 1085219089Spjdvoid 1086219089Spjdvdev_open_children(vdev_t *vd) 1087219089Spjd{ 1088219089Spjd taskq_t *tq; 1089219089Spjd int children = vd->vdev_children; 1090219089Spjd 1091219089Spjd /* 1092219089Spjd * in order to handle pools on top of zvols, do the opens 1093219089Spjd * in a single thread so that the same thread holds the 1094219089Spjd * spa_namespace_lock 1095219089Spjd */ 1096219089Spjd if (B_TRUE || vdev_uses_zvols(vd)) { 1097219089Spjd for (int c = 0; c < children; c++) 1098219089Spjd vd->vdev_child[c]->vdev_open_error = 1099219089Spjd vdev_open(vd->vdev_child[c]); 1100219089Spjd return; 1101219089Spjd } 1102219089Spjd tq = taskq_create("vdev_open", children, minclsyspri, 1103219089Spjd children, children, TASKQ_PREPOPULATE); 1104219089Spjd 1105219089Spjd for (int c = 0; c < children; c++) 1106219089Spjd VERIFY(taskq_dispatch(tq, vdev_open_child, vd->vdev_child[c], 1107219089Spjd TQ_SLEEP) != 0); 1108219089Spjd 1109219089Spjd taskq_destroy(tq); 1110219089Spjd} 1111219089Spjd 1112185029Spjd/* 1113168404Spjd * Prepare a virtual device for access. 1114168404Spjd */ 1115168404Spjdint 1116168404Spjdvdev_open(vdev_t *vd) 1117168404Spjd{ 1118209962Smm spa_t *spa = vd->vdev_spa; 1119168404Spjd int error; 1120168404Spjd uint64_t osize = 0; 1121236155Smm uint64_t max_osize = 0; 1122236155Smm uint64_t asize, max_asize, psize; 1123168404Spjd uint64_t ashift = 0; 1124168404Spjd 1125219089Spjd ASSERT(vd->vdev_open_thread == curthread || 1126219089Spjd spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1127168404Spjd ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || 1128168404Spjd vd->vdev_state == VDEV_STATE_CANT_OPEN || 1129168404Spjd vd->vdev_state == VDEV_STATE_OFFLINE); 1130168404Spjd 1131168404Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 1132213197Smm vd->vdev_cant_read = B_FALSE; 1133213197Smm vd->vdev_cant_write = B_FALSE; 1134219089Spjd vd->vdev_min_asize = vdev_get_min_asize(vd); 1135168404Spjd 1136219089Spjd /* 1137219089Spjd * If this vdev is not removed, check its fault status. If it's 1138219089Spjd * faulted, bail out of the open. 1139219089Spjd */ 1140185029Spjd if (!vd->vdev_removed && vd->vdev_faulted) { 1141168404Spjd ASSERT(vd->vdev_children == 0); 1142219089Spjd ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || 1143219089Spjd vd->vdev_label_aux == VDEV_AUX_EXTERNAL); 1144185029Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1145219089Spjd vd->vdev_label_aux); 1146249195Smm return (SET_ERROR(ENXIO)); 1147185029Spjd } else if (vd->vdev_offline) { 1148185029Spjd ASSERT(vd->vdev_children == 0); 1149168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); 1150249195Smm return (SET_ERROR(ENXIO)); 1151168404Spjd } 1152168404Spjd 1153236155Smm error = vd->vdev_ops->vdev_op_open(vd, &osize, &max_osize, &ashift); 1154168404Spjd 1155219089Spjd /* 1156219089Spjd * Reset the vdev_reopening flag so that we actually close 1157219089Spjd * the vdev on error. 1158219089Spjd */ 1159219089Spjd vd->vdev_reopening = B_FALSE; 1160168404Spjd if (zio_injection_enabled && error == 0) 1161213198Smm error = zio_handle_device_injection(vd, NULL, ENXIO); 1162168404Spjd 1163185029Spjd if (error) { 1164185029Spjd if (vd->vdev_removed && 1165185029Spjd vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) 1166185029Spjd vd->vdev_removed = B_FALSE; 1167168404Spjd 1168168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1169168404Spjd vd->vdev_stat.vs_aux); 1170168404Spjd return (error); 1171168404Spjd } 1172168404Spjd 1173185029Spjd vd->vdev_removed = B_FALSE; 1174168404Spjd 1175219089Spjd /* 1176219089Spjd * Recheck the faulted flag now that we have confirmed that 1177219089Spjd * the vdev is accessible. If we're faulted, bail. 1178219089Spjd */ 1179219089Spjd if (vd->vdev_faulted) { 1180219089Spjd ASSERT(vd->vdev_children == 0); 1181219089Spjd ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || 1182219089Spjd vd->vdev_label_aux == VDEV_AUX_EXTERNAL); 1183219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1184219089Spjd vd->vdev_label_aux); 1185249195Smm return (SET_ERROR(ENXIO)); 1186219089Spjd } 1187219089Spjd 1188185029Spjd if (vd->vdev_degraded) { 1189185029Spjd ASSERT(vd->vdev_children == 0); 1190185029Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 1191185029Spjd VDEV_AUX_ERR_EXCEEDED); 1192185029Spjd } else { 1193219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_HEALTHY, 0); 1194185029Spjd } 1195185029Spjd 1196219089Spjd /* 1197219089Spjd * For hole or missing vdevs we just return success. 1198219089Spjd */ 1199219089Spjd if (vd->vdev_ishole || vd->vdev_ops == &vdev_missing_ops) 1200219089Spjd return (0); 1201219089Spjd 1202240868Spjd if (vd->vdev_ops->vdev_op_leaf) { 1203240868Spjd vd->vdev_notrim = B_FALSE; 1204240868Spjd trim_map_create(vd); 1205240868Spjd } 1206240868Spjd 1207219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 1208168404Spjd if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { 1209168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 1210168404Spjd VDEV_AUX_NONE); 1211168404Spjd break; 1212168404Spjd } 1213219089Spjd } 1214168404Spjd 1215168404Spjd osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); 1216236155Smm max_osize = P2ALIGN(max_osize, (uint64_t)sizeof (vdev_label_t)); 1217168404Spjd 1218168404Spjd if (vd->vdev_children == 0) { 1219168404Spjd if (osize < SPA_MINDEVSIZE) { 1220168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1221168404Spjd VDEV_AUX_TOO_SMALL); 1222249195Smm return (SET_ERROR(EOVERFLOW)); 1223168404Spjd } 1224168404Spjd psize = osize; 1225168404Spjd asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); 1226236155Smm max_asize = max_osize - (VDEV_LABEL_START_SIZE + 1227236155Smm VDEV_LABEL_END_SIZE); 1228168404Spjd } else { 1229168404Spjd if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - 1230168404Spjd (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { 1231168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1232168404Spjd VDEV_AUX_TOO_SMALL); 1233249195Smm return (SET_ERROR(EOVERFLOW)); 1234168404Spjd } 1235168404Spjd psize = 0; 1236168404Spjd asize = osize; 1237236155Smm max_asize = max_osize; 1238168404Spjd } 1239168404Spjd 1240168404Spjd vd->vdev_psize = psize; 1241168404Spjd 1242219089Spjd /* 1243219089Spjd * Make sure the allocatable size hasn't shrunk. 1244219089Spjd */ 1245219089Spjd if (asize < vd->vdev_min_asize) { 1246219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1247219089Spjd VDEV_AUX_BAD_LABEL); 1248249195Smm return (SET_ERROR(EINVAL)); 1249219089Spjd } 1250219089Spjd 1251168404Spjd if (vd->vdev_asize == 0) { 1252168404Spjd /* 1253168404Spjd * This is the first-ever open, so use the computed values. 1254168404Spjd * For testing purposes, a higher ashift can be requested. 1255168404Spjd */ 1256168404Spjd vd->vdev_asize = asize; 1257236155Smm vd->vdev_max_asize = max_asize; 1258168404Spjd vd->vdev_ashift = MAX(ashift, vd->vdev_ashift); 1259168404Spjd } else { 1260168404Spjd /* 1261253441Sdelphij * Detect if the alignment requirement has increased. 1262253441Sdelphij * We don't want to make the pool unavailable, just 1263253441Sdelphij * issue a warning instead. 1264168404Spjd */ 1265253441Sdelphij if (ashift > vd->vdev_top->vdev_ashift && 1266253441Sdelphij vd->vdev_ops->vdev_op_leaf) { 1267253441Sdelphij cmn_err(CE_WARN, 1268253441Sdelphij "Disk, '%s', has a block alignment that is " 1269253441Sdelphij "larger than the pool's alignment\n", 1270253441Sdelphij vd->vdev_path); 1271168404Spjd } 1272236155Smm vd->vdev_max_asize = max_asize; 1273219089Spjd } 1274168404Spjd 1275219089Spjd /* 1276219089Spjd * If all children are healthy and the asize has increased, 1277219089Spjd * then we've experienced dynamic LUN growth. If automatic 1278219089Spjd * expansion is enabled then use the additional space. 1279219089Spjd */ 1280219089Spjd if (vd->vdev_state == VDEV_STATE_HEALTHY && asize > vd->vdev_asize && 1281219089Spjd (vd->vdev_expanding || spa->spa_autoexpand)) 1282219089Spjd vd->vdev_asize = asize; 1283168404Spjd 1284219089Spjd vdev_set_min_asize(vd); 1285168404Spjd 1286168404Spjd /* 1287185029Spjd * Ensure we can issue some IO before declaring the 1288185029Spjd * vdev open for business. 1289185029Spjd */ 1290185029Spjd if (vd->vdev_ops->vdev_op_leaf && 1291185029Spjd (error = zio_wait(vdev_probe(vd, NULL))) != 0) { 1292219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1293219089Spjd VDEV_AUX_ERR_EXCEEDED); 1294185029Spjd return (error); 1295185029Spjd } 1296185029Spjd 1297185029Spjd /* 1298185029Spjd * If a leaf vdev has a DTL, and seems healthy, then kick off a 1299209962Smm * resilver. But don't do this if we are doing a reopen for a scrub, 1300209962Smm * since this would just restart the scrub we are already doing. 1301168404Spjd */ 1302209962Smm if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen && 1303209962Smm vdev_resilver_needed(vd, NULL, NULL)) 1304209962Smm spa_async_request(spa, SPA_ASYNC_RESILVER); 1305168404Spjd 1306168404Spjd return (0); 1307168404Spjd} 1308168404Spjd 1309168404Spjd/* 1310168404Spjd * Called once the vdevs are all opened, this routine validates the label 1311168404Spjd * contents. This needs to be done before vdev_load() so that we don't 1312185029Spjd * inadvertently do repair I/Os to the wrong device. 1313168404Spjd * 1314230514Smm * If 'strict' is false ignore the spa guid check. This is necessary because 1315230514Smm * if the machine crashed during a re-guid the new guid might have been written 1316230514Smm * to all of the vdev labels, but not the cached config. The strict check 1317230514Smm * will be performed when the pool is opened again using the mos config. 1318230514Smm * 1319168404Spjd * This function will only return failure if one of the vdevs indicates that it 1320168404Spjd * has since been destroyed or exported. This is only possible if 1321168404Spjd * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state 1322168404Spjd * will be updated but the function will return 0. 1323168404Spjd */ 1324168404Spjdint 1325230514Smmvdev_validate(vdev_t *vd, boolean_t strict) 1326168404Spjd{ 1327168404Spjd spa_t *spa = vd->vdev_spa; 1328168404Spjd nvlist_t *label; 1329219089Spjd uint64_t guid = 0, top_guid; 1330168404Spjd uint64_t state; 1331168404Spjd 1332219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1333230514Smm if (vdev_validate(vd->vdev_child[c], strict) != 0) 1334249195Smm return (SET_ERROR(EBADF)); 1335168404Spjd 1336168404Spjd /* 1337168404Spjd * If the device has already failed, or was marked offline, don't do 1338168404Spjd * any further validation. Otherwise, label I/O will fail and we will 1339168404Spjd * overwrite the previous state. 1340168404Spjd */ 1341185029Spjd if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { 1342219089Spjd uint64_t aux_guid = 0; 1343219089Spjd nvlist_t *nvl; 1344246631Smm uint64_t txg = spa_last_synced_txg(spa) != 0 ? 1345246631Smm spa_last_synced_txg(spa) : -1ULL; 1346168404Spjd 1347239620Smm if ((label = vdev_label_read_config(vd, txg)) == NULL) { 1348168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1349168404Spjd VDEV_AUX_BAD_LABEL); 1350168404Spjd return (0); 1351168404Spjd } 1352168404Spjd 1353219089Spjd /* 1354219089Spjd * Determine if this vdev has been split off into another 1355219089Spjd * pool. If so, then refuse to open it. 1356219089Spjd */ 1357219089Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_SPLIT_GUID, 1358219089Spjd &aux_guid) == 0 && aux_guid == spa_guid(spa)) { 1359219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1360219089Spjd VDEV_AUX_SPLIT_POOL); 1361219089Spjd nvlist_free(label); 1362219089Spjd return (0); 1363219089Spjd } 1364219089Spjd 1365230514Smm if (strict && (nvlist_lookup_uint64(label, 1366230514Smm ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 1367230514Smm guid != spa_guid(spa))) { 1368168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1369168404Spjd VDEV_AUX_CORRUPT_DATA); 1370168404Spjd nvlist_free(label); 1371168404Spjd return (0); 1372168404Spjd } 1373168404Spjd 1374219089Spjd if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvl) 1375219089Spjd != 0 || nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_ORIG_GUID, 1376219089Spjd &aux_guid) != 0) 1377219089Spjd aux_guid = 0; 1378219089Spjd 1379185029Spjd /* 1380185029Spjd * If this vdev just became a top-level vdev because its 1381185029Spjd * sibling was detached, it will have adopted the parent's 1382185029Spjd * vdev guid -- but the label may or may not be on disk yet. 1383185029Spjd * Fortunately, either version of the label will have the 1384185029Spjd * same top guid, so if we're a top-level vdev, we can 1385185029Spjd * safely compare to that instead. 1386219089Spjd * 1387219089Spjd * If we split this vdev off instead, then we also check the 1388219089Spjd * original pool's guid. We don't want to consider the vdev 1389219089Spjd * corrupt if it is partway through a split operation. 1390185029Spjd */ 1391168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, 1392185029Spjd &guid) != 0 || 1393185029Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, 1394185029Spjd &top_guid) != 0 || 1395219089Spjd ((vd->vdev_guid != guid && vd->vdev_guid != aux_guid) && 1396185029Spjd (vd->vdev_guid != top_guid || vd != vd->vdev_top))) { 1397168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1398168404Spjd VDEV_AUX_CORRUPT_DATA); 1399168404Spjd nvlist_free(label); 1400168404Spjd return (0); 1401168404Spjd } 1402168404Spjd 1403168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, 1404168404Spjd &state) != 0) { 1405168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1406168404Spjd VDEV_AUX_CORRUPT_DATA); 1407168404Spjd nvlist_free(label); 1408168404Spjd return (0); 1409168404Spjd } 1410168404Spjd 1411168404Spjd nvlist_free(label); 1412168404Spjd 1413209962Smm /* 1414219089Spjd * If this is a verbatim import, no need to check the 1415209962Smm * state of the pool. 1416209962Smm */ 1417219089Spjd if (!(spa->spa_import_flags & ZFS_IMPORT_VERBATIM) && 1418219089Spjd spa_load_state(spa) == SPA_LOAD_OPEN && 1419168404Spjd state != POOL_STATE_ACTIVE) 1420249195Smm return (SET_ERROR(EBADF)); 1421185029Spjd 1422185029Spjd /* 1423185029Spjd * If we were able to open and validate a vdev that was 1424185029Spjd * previously marked permanently unavailable, clear that state 1425185029Spjd * now. 1426185029Spjd */ 1427185029Spjd if (vd->vdev_not_present) 1428185029Spjd vd->vdev_not_present = 0; 1429168404Spjd } 1430168404Spjd 1431168404Spjd return (0); 1432168404Spjd} 1433168404Spjd 1434168404Spjd/* 1435168404Spjd * Close a virtual device. 1436168404Spjd */ 1437168404Spjdvoid 1438168404Spjdvdev_close(vdev_t *vd) 1439168404Spjd{ 1440209962Smm spa_t *spa = vd->vdev_spa; 1441219089Spjd vdev_t *pvd = vd->vdev_parent; 1442209962Smm 1443209962Smm ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1444209962Smm 1445219089Spjd /* 1446219089Spjd * If our parent is reopening, then we are as well, unless we are 1447219089Spjd * going offline. 1448219089Spjd */ 1449219089Spjd if (pvd != NULL && pvd->vdev_reopening) 1450219089Spjd vd->vdev_reopening = (pvd->vdev_reopening && !vd->vdev_offline); 1451219089Spjd 1452168404Spjd vd->vdev_ops->vdev_op_close(vd); 1453168404Spjd 1454185029Spjd vdev_cache_purge(vd); 1455168404Spjd 1456240868Spjd if (vd->vdev_ops->vdev_op_leaf) 1457240868Spjd trim_map_destroy(vd); 1458240868Spjd 1459168404Spjd /* 1460219089Spjd * We record the previous state before we close it, so that if we are 1461168404Spjd * doing a reopen(), we don't generate FMA ereports if we notice that 1462168404Spjd * it's still faulted. 1463168404Spjd */ 1464168404Spjd vd->vdev_prevstate = vd->vdev_state; 1465168404Spjd 1466168404Spjd if (vd->vdev_offline) 1467168404Spjd vd->vdev_state = VDEV_STATE_OFFLINE; 1468168404Spjd else 1469168404Spjd vd->vdev_state = VDEV_STATE_CLOSED; 1470168404Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 1471168404Spjd} 1472168404Spjd 1473168404Spjdvoid 1474219089Spjdvdev_hold(vdev_t *vd) 1475219089Spjd{ 1476219089Spjd spa_t *spa = vd->vdev_spa; 1477219089Spjd 1478219089Spjd ASSERT(spa_is_root(spa)); 1479219089Spjd if (spa->spa_state == POOL_STATE_UNINITIALIZED) 1480219089Spjd return; 1481219089Spjd 1482219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1483219089Spjd vdev_hold(vd->vdev_child[c]); 1484219089Spjd 1485219089Spjd if (vd->vdev_ops->vdev_op_leaf) 1486219089Spjd vd->vdev_ops->vdev_op_hold(vd); 1487219089Spjd} 1488219089Spjd 1489219089Spjdvoid 1490219089Spjdvdev_rele(vdev_t *vd) 1491219089Spjd{ 1492219089Spjd spa_t *spa = vd->vdev_spa; 1493219089Spjd 1494219089Spjd ASSERT(spa_is_root(spa)); 1495219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1496219089Spjd vdev_rele(vd->vdev_child[c]); 1497219089Spjd 1498219089Spjd if (vd->vdev_ops->vdev_op_leaf) 1499219089Spjd vd->vdev_ops->vdev_op_rele(vd); 1500219089Spjd} 1501219089Spjd 1502219089Spjd/* 1503219089Spjd * Reopen all interior vdevs and any unopened leaves. We don't actually 1504219089Spjd * reopen leaf vdevs which had previously been opened as they might deadlock 1505219089Spjd * on the spa_config_lock. Instead we only obtain the leaf's physical size. 1506219089Spjd * If the leaf has never been opened then open it, as usual. 1507219089Spjd */ 1508219089Spjdvoid 1509168404Spjdvdev_reopen(vdev_t *vd) 1510168404Spjd{ 1511168404Spjd spa_t *spa = vd->vdev_spa; 1512168404Spjd 1513185029Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1514168404Spjd 1515219089Spjd /* set the reopening flag unless we're taking the vdev offline */ 1516219089Spjd vd->vdev_reopening = !vd->vdev_offline; 1517168404Spjd vdev_close(vd); 1518168404Spjd (void) vdev_open(vd); 1519168404Spjd 1520168404Spjd /* 1521168404Spjd * Call vdev_validate() here to make sure we have the same device. 1522168404Spjd * Otherwise, a device with an invalid label could be successfully 1523168404Spjd * opened in response to vdev_reopen(). 1524168404Spjd */ 1525185029Spjd if (vd->vdev_aux) { 1526185029Spjd (void) vdev_validate_aux(vd); 1527185029Spjd if (vdev_readable(vd) && vdev_writeable(vd) && 1528209962Smm vd->vdev_aux == &spa->spa_l2cache && 1529219089Spjd !l2arc_vdev_present(vd)) 1530219089Spjd l2arc_add_vdev(spa, vd); 1531185029Spjd } else { 1532246631Smm (void) vdev_validate(vd, B_TRUE); 1533185029Spjd } 1534168404Spjd 1535168404Spjd /* 1536185029Spjd * Reassess parent vdev's health. 1537168404Spjd */ 1538185029Spjd vdev_propagate_state(vd); 1539168404Spjd} 1540168404Spjd 1541168404Spjdint 1542168404Spjdvdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) 1543168404Spjd{ 1544168404Spjd int error; 1545168404Spjd 1546168404Spjd /* 1547168404Spjd * Normally, partial opens (e.g. of a mirror) are allowed. 1548168404Spjd * For a create, however, we want to fail the request if 1549168404Spjd * there are any components we can't open. 1550168404Spjd */ 1551168404Spjd error = vdev_open(vd); 1552168404Spjd 1553168404Spjd if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { 1554168404Spjd vdev_close(vd); 1555168404Spjd return (error ? error : ENXIO); 1556168404Spjd } 1557168404Spjd 1558168404Spjd /* 1559168404Spjd * Recursively initialize all labels. 1560168404Spjd */ 1561168404Spjd if ((error = vdev_label_init(vd, txg, isreplacing ? 1562168404Spjd VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { 1563168404Spjd vdev_close(vd); 1564168404Spjd return (error); 1565168404Spjd } 1566168404Spjd 1567168404Spjd return (0); 1568168404Spjd} 1569168404Spjd 1570168404Spjdvoid 1571219089Spjdvdev_metaslab_set_size(vdev_t *vd) 1572168404Spjd{ 1573168404Spjd /* 1574168404Spjd * Aim for roughly 200 metaslabs per vdev. 1575168404Spjd */ 1576168404Spjd vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); 1577168404Spjd vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); 1578168404Spjd} 1579168404Spjd 1580168404Spjdvoid 1581168404Spjdvdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) 1582168404Spjd{ 1583168404Spjd ASSERT(vd == vd->vdev_top); 1584219089Spjd ASSERT(!vd->vdev_ishole); 1585168404Spjd ASSERT(ISP2(flags)); 1586219089Spjd ASSERT(spa_writeable(vd->vdev_spa)); 1587168404Spjd 1588168404Spjd if (flags & VDD_METASLAB) 1589168404Spjd (void) txg_list_add(&vd->vdev_ms_list, arg, txg); 1590168404Spjd 1591168404Spjd if (flags & VDD_DTL) 1592168404Spjd (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); 1593168404Spjd 1594168404Spjd (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); 1595168404Spjd} 1596168404Spjd 1597209962Smm/* 1598209962Smm * DTLs. 1599209962Smm * 1600209962Smm * A vdev's DTL (dirty time log) is the set of transaction groups for which 1601219089Spjd * the vdev has less than perfect replication. There are four kinds of DTL: 1602209962Smm * 1603209962Smm * DTL_MISSING: txgs for which the vdev has no valid copies of the data 1604209962Smm * 1605209962Smm * DTL_PARTIAL: txgs for which data is available, but not fully replicated 1606209962Smm * 1607209962Smm * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon 1608209962Smm * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of 1609209962Smm * txgs that was scrubbed. 1610209962Smm * 1611209962Smm * DTL_OUTAGE: txgs which cannot currently be read, whether due to 1612209962Smm * persistent errors or just some device being offline. 1613209962Smm * Unlike the other three, the DTL_OUTAGE map is not generally 1614209962Smm * maintained; it's only computed when needed, typically to 1615209962Smm * determine whether a device can be detached. 1616209962Smm * 1617209962Smm * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device 1618209962Smm * either has the data or it doesn't. 1619209962Smm * 1620209962Smm * For interior vdevs such as mirror and RAID-Z the picture is more complex. 1621209962Smm * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because 1622209962Smm * if any child is less than fully replicated, then so is its parent. 1623209962Smm * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs, 1624209962Smm * comprising only those txgs which appear in 'maxfaults' or more children; 1625209962Smm * those are the txgs we don't have enough replication to read. For example, 1626209962Smm * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2); 1627209962Smm * thus, its DTL_MISSING consists of the set of txgs that appear in more than 1628209962Smm * two child DTL_MISSING maps. 1629209962Smm * 1630209962Smm * It should be clear from the above that to compute the DTLs and outage maps 1631209962Smm * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps. 1632209962Smm * Therefore, that is all we keep on disk. When loading the pool, or after 1633209962Smm * a configuration change, we generate all other DTLs from first principles. 1634209962Smm */ 1635168404Spjdvoid 1636209962Smmvdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1637168404Spjd{ 1638209962Smm space_map_t *sm = &vd->vdev_dtl[t]; 1639209962Smm 1640209962Smm ASSERT(t < DTL_TYPES); 1641209962Smm ASSERT(vd != vd->vdev_spa->spa_root_vdev); 1642219089Spjd ASSERT(spa_writeable(vd->vdev_spa)); 1643209962Smm 1644168404Spjd mutex_enter(sm->sm_lock); 1645168404Spjd if (!space_map_contains(sm, txg, size)) 1646168404Spjd space_map_add(sm, txg, size); 1647168404Spjd mutex_exit(sm->sm_lock); 1648168404Spjd} 1649168404Spjd 1650209962Smmboolean_t 1651209962Smmvdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1652168404Spjd{ 1653209962Smm space_map_t *sm = &vd->vdev_dtl[t]; 1654209962Smm boolean_t dirty = B_FALSE; 1655168404Spjd 1656209962Smm ASSERT(t < DTL_TYPES); 1657209962Smm ASSERT(vd != vd->vdev_spa->spa_root_vdev); 1658168404Spjd 1659168404Spjd mutex_enter(sm->sm_lock); 1660209962Smm if (sm->sm_space != 0) 1661209962Smm dirty = space_map_contains(sm, txg, size); 1662168404Spjd mutex_exit(sm->sm_lock); 1663168404Spjd 1664168404Spjd return (dirty); 1665168404Spjd} 1666168404Spjd 1667209962Smmboolean_t 1668209962Smmvdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t) 1669209962Smm{ 1670209962Smm space_map_t *sm = &vd->vdev_dtl[t]; 1671209962Smm boolean_t empty; 1672209962Smm 1673209962Smm mutex_enter(sm->sm_lock); 1674209962Smm empty = (sm->sm_space == 0); 1675209962Smm mutex_exit(sm->sm_lock); 1676209962Smm 1677209962Smm return (empty); 1678209962Smm} 1679209962Smm 1680168404Spjd/* 1681168404Spjd * Reassess DTLs after a config change or scrub completion. 1682168404Spjd */ 1683168404Spjdvoid 1684168404Spjdvdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) 1685168404Spjd{ 1686168404Spjd spa_t *spa = vd->vdev_spa; 1687209962Smm avl_tree_t reftree; 1688209962Smm int minref; 1689168404Spjd 1690209962Smm ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 1691168404Spjd 1692209962Smm for (int c = 0; c < vd->vdev_children; c++) 1693209962Smm vdev_dtl_reassess(vd->vdev_child[c], txg, 1694209962Smm scrub_txg, scrub_done); 1695209962Smm 1696219089Spjd if (vd == spa->spa_root_vdev || vd->vdev_ishole || vd->vdev_aux) 1697209962Smm return; 1698209962Smm 1699209962Smm if (vd->vdev_ops->vdev_op_leaf) { 1700219089Spjd dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; 1701219089Spjd 1702168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1703185029Spjd if (scrub_txg != 0 && 1704219089Spjd (spa->spa_scrub_started || 1705219089Spjd (scn && scn->scn_phys.scn_errors == 0))) { 1706185029Spjd /* 1707185029Spjd * We completed a scrub up to scrub_txg. If we 1708185029Spjd * did it without rebooting, then the scrub dtl 1709185029Spjd * will be valid, so excise the old region and 1710185029Spjd * fold in the scrub dtl. Otherwise, leave the 1711185029Spjd * dtl as-is if there was an error. 1712209962Smm * 1713209962Smm * There's little trick here: to excise the beginning 1714209962Smm * of the DTL_MISSING map, we put it into a reference 1715209962Smm * tree and then add a segment with refcnt -1 that 1716209962Smm * covers the range [0, scrub_txg). This means 1717209962Smm * that each txg in that range has refcnt -1 or 0. 1718209962Smm * We then add DTL_SCRUB with a refcnt of 2, so that 1719209962Smm * entries in the range [0, scrub_txg) will have a 1720209962Smm * positive refcnt -- either 1 or 2. We then convert 1721209962Smm * the reference tree into the new DTL_MISSING map. 1722185029Spjd */ 1723209962Smm space_map_ref_create(&reftree); 1724209962Smm space_map_ref_add_map(&reftree, 1725209962Smm &vd->vdev_dtl[DTL_MISSING], 1); 1726209962Smm space_map_ref_add_seg(&reftree, 0, scrub_txg, -1); 1727209962Smm space_map_ref_add_map(&reftree, 1728209962Smm &vd->vdev_dtl[DTL_SCRUB], 2); 1729209962Smm space_map_ref_generate_map(&reftree, 1730209962Smm &vd->vdev_dtl[DTL_MISSING], 1); 1731209962Smm space_map_ref_destroy(&reftree); 1732168404Spjd } 1733209962Smm space_map_vacate(&vd->vdev_dtl[DTL_PARTIAL], NULL, NULL); 1734209962Smm space_map_walk(&vd->vdev_dtl[DTL_MISSING], 1735209962Smm space_map_add, &vd->vdev_dtl[DTL_PARTIAL]); 1736168404Spjd if (scrub_done) 1737209962Smm space_map_vacate(&vd->vdev_dtl[DTL_SCRUB], NULL, NULL); 1738209962Smm space_map_vacate(&vd->vdev_dtl[DTL_OUTAGE], NULL, NULL); 1739209962Smm if (!vdev_readable(vd)) 1740209962Smm space_map_add(&vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL); 1741209962Smm else 1742209962Smm space_map_walk(&vd->vdev_dtl[DTL_MISSING], 1743209962Smm space_map_add, &vd->vdev_dtl[DTL_OUTAGE]); 1744168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1745185029Spjd 1746168404Spjd if (txg != 0) 1747168404Spjd vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); 1748168404Spjd return; 1749168404Spjd } 1750168404Spjd 1751168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1752209962Smm for (int t = 0; t < DTL_TYPES; t++) { 1753209962Smm /* account for child's outage in parent's missing map */ 1754209962Smm int s = (t == DTL_MISSING) ? DTL_OUTAGE: t; 1755209962Smm if (t == DTL_SCRUB) 1756209962Smm continue; /* leaf vdevs only */ 1757209962Smm if (t == DTL_PARTIAL) 1758209962Smm minref = 1; /* i.e. non-zero */ 1759209962Smm else if (vd->vdev_nparity != 0) 1760209962Smm minref = vd->vdev_nparity + 1; /* RAID-Z */ 1761209962Smm else 1762209962Smm minref = vd->vdev_children; /* any kind of mirror */ 1763209962Smm space_map_ref_create(&reftree); 1764209962Smm for (int c = 0; c < vd->vdev_children; c++) { 1765209962Smm vdev_t *cvd = vd->vdev_child[c]; 1766209962Smm mutex_enter(&cvd->vdev_dtl_lock); 1767209962Smm space_map_ref_add_map(&reftree, &cvd->vdev_dtl[s], 1); 1768209962Smm mutex_exit(&cvd->vdev_dtl_lock); 1769209962Smm } 1770209962Smm space_map_ref_generate_map(&reftree, &vd->vdev_dtl[t], minref); 1771209962Smm space_map_ref_destroy(&reftree); 1772209962Smm } 1773168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1774168404Spjd} 1775168404Spjd 1776168404Spjdstatic int 1777168404Spjdvdev_dtl_load(vdev_t *vd) 1778168404Spjd{ 1779168404Spjd spa_t *spa = vd->vdev_spa; 1780209962Smm space_map_obj_t *smo = &vd->vdev_dtl_smo; 1781168404Spjd objset_t *mos = spa->spa_meta_objset; 1782168404Spjd dmu_buf_t *db; 1783168404Spjd int error; 1784168404Spjd 1785168404Spjd ASSERT(vd->vdev_children == 0); 1786168404Spjd 1787168404Spjd if (smo->smo_object == 0) 1788168404Spjd return (0); 1789168404Spjd 1790219089Spjd ASSERT(!vd->vdev_ishole); 1791219089Spjd 1792168404Spjd if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) 1793168404Spjd return (error); 1794168404Spjd 1795185029Spjd ASSERT3U(db->db_size, >=, sizeof (*smo)); 1796185029Spjd bcopy(db->db_data, smo, sizeof (*smo)); 1797168404Spjd dmu_buf_rele(db, FTAG); 1798168404Spjd 1799168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1800209962Smm error = space_map_load(&vd->vdev_dtl[DTL_MISSING], 1801209962Smm NULL, SM_ALLOC, smo, mos); 1802168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1803168404Spjd 1804168404Spjd return (error); 1805168404Spjd} 1806168404Spjd 1807168404Spjdvoid 1808168404Spjdvdev_dtl_sync(vdev_t *vd, uint64_t txg) 1809168404Spjd{ 1810168404Spjd spa_t *spa = vd->vdev_spa; 1811209962Smm space_map_obj_t *smo = &vd->vdev_dtl_smo; 1812209962Smm space_map_t *sm = &vd->vdev_dtl[DTL_MISSING]; 1813168404Spjd objset_t *mos = spa->spa_meta_objset; 1814168404Spjd space_map_t smsync; 1815168404Spjd kmutex_t smlock; 1816168404Spjd dmu_buf_t *db; 1817168404Spjd dmu_tx_t *tx; 1818168404Spjd 1819219089Spjd ASSERT(!vd->vdev_ishole); 1820219089Spjd 1821168404Spjd tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 1822168404Spjd 1823168404Spjd if (vd->vdev_detached) { 1824168404Spjd if (smo->smo_object != 0) { 1825168404Spjd int err = dmu_object_free(mos, smo->smo_object, tx); 1826240415Smm ASSERT0(err); 1827168404Spjd smo->smo_object = 0; 1828168404Spjd } 1829168404Spjd dmu_tx_commit(tx); 1830168404Spjd return; 1831168404Spjd } 1832168404Spjd 1833168404Spjd if (smo->smo_object == 0) { 1834168404Spjd ASSERT(smo->smo_objsize == 0); 1835168404Spjd ASSERT(smo->smo_alloc == 0); 1836168404Spjd smo->smo_object = dmu_object_alloc(mos, 1837168404Spjd DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, 1838168404Spjd DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); 1839168404Spjd ASSERT(smo->smo_object != 0); 1840168404Spjd vdev_config_dirty(vd->vdev_top); 1841168404Spjd } 1842168404Spjd 1843252060Ssmh bzero(&smlock, sizeof (smlock)); 1844168404Spjd mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); 1845168404Spjd 1846168404Spjd space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, 1847168404Spjd &smlock); 1848168404Spjd 1849168404Spjd mutex_enter(&smlock); 1850168404Spjd 1851168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1852168404Spjd space_map_walk(sm, space_map_add, &smsync); 1853168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1854168404Spjd 1855168404Spjd space_map_truncate(smo, mos, tx); 1856168404Spjd space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); 1857247398Smm space_map_vacate(&smsync, NULL, NULL); 1858168404Spjd 1859168404Spjd space_map_destroy(&smsync); 1860168404Spjd 1861168404Spjd mutex_exit(&smlock); 1862168404Spjd mutex_destroy(&smlock); 1863168404Spjd 1864168404Spjd VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); 1865168404Spjd dmu_buf_will_dirty(db, tx); 1866185029Spjd ASSERT3U(db->db_size, >=, sizeof (*smo)); 1867185029Spjd bcopy(smo, db->db_data, sizeof (*smo)); 1868168404Spjd dmu_buf_rele(db, FTAG); 1869168404Spjd 1870168404Spjd dmu_tx_commit(tx); 1871168404Spjd} 1872168404Spjd 1873185029Spjd/* 1874209962Smm * Determine whether the specified vdev can be offlined/detached/removed 1875209962Smm * without losing data. 1876209962Smm */ 1877209962Smmboolean_t 1878209962Smmvdev_dtl_required(vdev_t *vd) 1879209962Smm{ 1880209962Smm spa_t *spa = vd->vdev_spa; 1881209962Smm vdev_t *tvd = vd->vdev_top; 1882209962Smm uint8_t cant_read = vd->vdev_cant_read; 1883209962Smm boolean_t required; 1884209962Smm 1885209962Smm ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1886209962Smm 1887209962Smm if (vd == spa->spa_root_vdev || vd == tvd) 1888209962Smm return (B_TRUE); 1889209962Smm 1890209962Smm /* 1891209962Smm * Temporarily mark the device as unreadable, and then determine 1892209962Smm * whether this results in any DTL outages in the top-level vdev. 1893209962Smm * If not, we can safely offline/detach/remove the device. 1894209962Smm */ 1895209962Smm vd->vdev_cant_read = B_TRUE; 1896209962Smm vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 1897209962Smm required = !vdev_dtl_empty(tvd, DTL_OUTAGE); 1898209962Smm vd->vdev_cant_read = cant_read; 1899209962Smm vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 1900209962Smm 1901219089Spjd if (!required && zio_injection_enabled) 1902219089Spjd required = !!zio_handle_device_injection(vd, NULL, ECHILD); 1903219089Spjd 1904209962Smm return (required); 1905209962Smm} 1906209962Smm 1907209962Smm/* 1908185029Spjd * Determine if resilver is needed, and if so the txg range. 1909185029Spjd */ 1910185029Spjdboolean_t 1911185029Spjdvdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) 1912185029Spjd{ 1913185029Spjd boolean_t needed = B_FALSE; 1914185029Spjd uint64_t thismin = UINT64_MAX; 1915185029Spjd uint64_t thismax = 0; 1916185029Spjd 1917185029Spjd if (vd->vdev_children == 0) { 1918185029Spjd mutex_enter(&vd->vdev_dtl_lock); 1919209962Smm if (vd->vdev_dtl[DTL_MISSING].sm_space != 0 && 1920209962Smm vdev_writeable(vd)) { 1921185029Spjd space_seg_t *ss; 1922185029Spjd 1923209962Smm ss = avl_first(&vd->vdev_dtl[DTL_MISSING].sm_root); 1924185029Spjd thismin = ss->ss_start - 1; 1925209962Smm ss = avl_last(&vd->vdev_dtl[DTL_MISSING].sm_root); 1926185029Spjd thismax = ss->ss_end; 1927185029Spjd needed = B_TRUE; 1928185029Spjd } 1929185029Spjd mutex_exit(&vd->vdev_dtl_lock); 1930185029Spjd } else { 1931209962Smm for (int c = 0; c < vd->vdev_children; c++) { 1932185029Spjd vdev_t *cvd = vd->vdev_child[c]; 1933185029Spjd uint64_t cmin, cmax; 1934185029Spjd 1935185029Spjd if (vdev_resilver_needed(cvd, &cmin, &cmax)) { 1936185029Spjd thismin = MIN(thismin, cmin); 1937185029Spjd thismax = MAX(thismax, cmax); 1938185029Spjd needed = B_TRUE; 1939185029Spjd } 1940185029Spjd } 1941185029Spjd } 1942185029Spjd 1943185029Spjd if (needed && minp) { 1944185029Spjd *minp = thismin; 1945185029Spjd *maxp = thismax; 1946185029Spjd } 1947185029Spjd return (needed); 1948185029Spjd} 1949185029Spjd 1950168404Spjdvoid 1951168404Spjdvdev_load(vdev_t *vd) 1952168404Spjd{ 1953168404Spjd /* 1954168404Spjd * Recursively load all children. 1955168404Spjd */ 1956209962Smm for (int c = 0; c < vd->vdev_children; c++) 1957168404Spjd vdev_load(vd->vdev_child[c]); 1958168404Spjd 1959168404Spjd /* 1960168404Spjd * If this is a top-level vdev, initialize its metaslabs. 1961168404Spjd */ 1962219089Spjd if (vd == vd->vdev_top && !vd->vdev_ishole && 1963168404Spjd (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || 1964168404Spjd vdev_metaslab_init(vd, 0) != 0)) 1965168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1966168404Spjd VDEV_AUX_CORRUPT_DATA); 1967168404Spjd 1968168404Spjd /* 1969168404Spjd * If this is a leaf vdev, load its DTL. 1970168404Spjd */ 1971168404Spjd if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) 1972168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1973168404Spjd VDEV_AUX_CORRUPT_DATA); 1974168404Spjd} 1975168404Spjd 1976168404Spjd/* 1977185029Spjd * The special vdev case is used for hot spares and l2cache devices. Its 1978185029Spjd * sole purpose it to set the vdev state for the associated vdev. To do this, 1979185029Spjd * we make sure that we can open the underlying device, then try to read the 1980185029Spjd * label, and make sure that the label is sane and that it hasn't been 1981185029Spjd * repurposed to another pool. 1982168404Spjd */ 1983168404Spjdint 1984185029Spjdvdev_validate_aux(vdev_t *vd) 1985168404Spjd{ 1986168404Spjd nvlist_t *label; 1987168404Spjd uint64_t guid, version; 1988168404Spjd uint64_t state; 1989168404Spjd 1990185029Spjd if (!vdev_readable(vd)) 1991185029Spjd return (0); 1992185029Spjd 1993239620Smm if ((label = vdev_label_read_config(vd, -1ULL)) == NULL) { 1994168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1995168404Spjd VDEV_AUX_CORRUPT_DATA); 1996168404Spjd return (-1); 1997168404Spjd } 1998168404Spjd 1999168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || 2000236884Smm !SPA_VERSION_IS_SUPPORTED(version) || 2001168404Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || 2002168404Spjd guid != vd->vdev_guid || 2003168404Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { 2004168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 2005168404Spjd VDEV_AUX_CORRUPT_DATA); 2006168404Spjd nvlist_free(label); 2007168404Spjd return (-1); 2008168404Spjd } 2009168404Spjd 2010168404Spjd /* 2011168404Spjd * We don't actually check the pool state here. If it's in fact in 2012168404Spjd * use by another pool, we update this fact on the fly when requested. 2013168404Spjd */ 2014168404Spjd nvlist_free(label); 2015168404Spjd return (0); 2016168404Spjd} 2017168404Spjd 2018168404Spjdvoid 2019219089Spjdvdev_remove(vdev_t *vd, uint64_t txg) 2020219089Spjd{ 2021219089Spjd spa_t *spa = vd->vdev_spa; 2022219089Spjd objset_t *mos = spa->spa_meta_objset; 2023219089Spjd dmu_tx_t *tx; 2024219089Spjd 2025219089Spjd tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg); 2026219089Spjd 2027219089Spjd if (vd->vdev_dtl_smo.smo_object) { 2028240415Smm ASSERT0(vd->vdev_dtl_smo.smo_alloc); 2029219089Spjd (void) dmu_object_free(mos, vd->vdev_dtl_smo.smo_object, tx); 2030219089Spjd vd->vdev_dtl_smo.smo_object = 0; 2031219089Spjd } 2032219089Spjd 2033219089Spjd if (vd->vdev_ms != NULL) { 2034219089Spjd for (int m = 0; m < vd->vdev_ms_count; m++) { 2035219089Spjd metaslab_t *msp = vd->vdev_ms[m]; 2036219089Spjd 2037219089Spjd if (msp == NULL || msp->ms_smo.smo_object == 0) 2038219089Spjd continue; 2039219089Spjd 2040240415Smm ASSERT0(msp->ms_smo.smo_alloc); 2041219089Spjd (void) dmu_object_free(mos, msp->ms_smo.smo_object, tx); 2042219089Spjd msp->ms_smo.smo_object = 0; 2043219089Spjd } 2044219089Spjd } 2045219089Spjd 2046219089Spjd if (vd->vdev_ms_array) { 2047219089Spjd (void) dmu_object_free(mos, vd->vdev_ms_array, tx); 2048219089Spjd vd->vdev_ms_array = 0; 2049219089Spjd vd->vdev_ms_shift = 0; 2050219089Spjd } 2051219089Spjd dmu_tx_commit(tx); 2052219089Spjd} 2053219089Spjd 2054219089Spjdvoid 2055168404Spjdvdev_sync_done(vdev_t *vd, uint64_t txg) 2056168404Spjd{ 2057168404Spjd metaslab_t *msp; 2058211931Smm boolean_t reassess = !txg_list_empty(&vd->vdev_ms_list, TXG_CLEAN(txg)); 2059168404Spjd 2060219089Spjd ASSERT(!vd->vdev_ishole); 2061219089Spjd 2062168404Spjd while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) 2063168404Spjd metaslab_sync_done(msp, txg); 2064211931Smm 2065211931Smm if (reassess) 2066211931Smm metaslab_sync_reassess(vd->vdev_mg); 2067168404Spjd} 2068168404Spjd 2069168404Spjdvoid 2070168404Spjdvdev_sync(vdev_t *vd, uint64_t txg) 2071168404Spjd{ 2072168404Spjd spa_t *spa = vd->vdev_spa; 2073168404Spjd vdev_t *lvd; 2074168404Spjd metaslab_t *msp; 2075168404Spjd dmu_tx_t *tx; 2076168404Spjd 2077219089Spjd ASSERT(!vd->vdev_ishole); 2078219089Spjd 2079168404Spjd if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { 2080168404Spjd ASSERT(vd == vd->vdev_top); 2081168404Spjd tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 2082168404Spjd vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, 2083168404Spjd DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); 2084168404Spjd ASSERT(vd->vdev_ms_array != 0); 2085168404Spjd vdev_config_dirty(vd); 2086168404Spjd dmu_tx_commit(tx); 2087168404Spjd } 2088168404Spjd 2089219089Spjd /* 2090219089Spjd * Remove the metadata associated with this vdev once it's empty. 2091219089Spjd */ 2092219089Spjd if (vd->vdev_stat.vs_alloc == 0 && vd->vdev_removing) 2093219089Spjd vdev_remove(vd, txg); 2094219089Spjd 2095168404Spjd while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { 2096168404Spjd metaslab_sync(msp, txg); 2097168404Spjd (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); 2098168404Spjd } 2099168404Spjd 2100168404Spjd while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) 2101168404Spjd vdev_dtl_sync(lvd, txg); 2102168404Spjd 2103168404Spjd (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); 2104168404Spjd} 2105168404Spjd 2106168404Spjduint64_t 2107168404Spjdvdev_psize_to_asize(vdev_t *vd, uint64_t psize) 2108168404Spjd{ 2109168404Spjd return (vd->vdev_ops->vdev_op_asize(vd, psize)); 2110168404Spjd} 2111168404Spjd 2112185029Spjd/* 2113185029Spjd * Mark the given vdev faulted. A faulted vdev behaves as if the device could 2114185029Spjd * not be opened, and no I/O is attempted. 2115185029Spjd */ 2116185029Spjdint 2117219089Spjdvdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux) 2118168404Spjd{ 2119219089Spjd vdev_t *vd, *tvd; 2120168404Spjd 2121219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2122185029Spjd 2123185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2124185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2125185029Spjd 2126185029Spjd if (!vd->vdev_ops->vdev_op_leaf) 2127185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2128185029Spjd 2129219089Spjd tvd = vd->vdev_top; 2130219089Spjd 2131185029Spjd /* 2132219089Spjd * We don't directly use the aux state here, but if we do a 2133219089Spjd * vdev_reopen(), we need this value to be present to remember why we 2134219089Spjd * were faulted. 2135219089Spjd */ 2136219089Spjd vd->vdev_label_aux = aux; 2137219089Spjd 2138219089Spjd /* 2139185029Spjd * Faulted state takes precedence over degraded. 2140185029Spjd */ 2141219089Spjd vd->vdev_delayed_close = B_FALSE; 2142185029Spjd vd->vdev_faulted = 1ULL; 2143185029Spjd vd->vdev_degraded = 0ULL; 2144219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, aux); 2145185029Spjd 2146185029Spjd /* 2147219089Spjd * If this device has the only valid copy of the data, then 2148219089Spjd * back off and simply mark the vdev as degraded instead. 2149185029Spjd */ 2150219089Spjd if (!tvd->vdev_islog && vd->vdev_aux == NULL && vdev_dtl_required(vd)) { 2151185029Spjd vd->vdev_degraded = 1ULL; 2152185029Spjd vd->vdev_faulted = 0ULL; 2153185029Spjd 2154185029Spjd /* 2155185029Spjd * If we reopen the device and it's not dead, only then do we 2156185029Spjd * mark it degraded. 2157185029Spjd */ 2158219089Spjd vdev_reopen(tvd); 2159185029Spjd 2160219089Spjd if (vdev_readable(vd)) 2161219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, aux); 2162185029Spjd } 2163185029Spjd 2164185029Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2165168404Spjd} 2166168404Spjd 2167185029Spjd/* 2168185029Spjd * Mark the given vdev degraded. A degraded vdev is purely an indication to the 2169185029Spjd * user that something is wrong. The vdev continues to operate as normal as far 2170185029Spjd * as I/O is concerned. 2171185029Spjd */ 2172185029Spjdint 2173219089Spjdvdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux) 2174168404Spjd{ 2175185029Spjd vdev_t *vd; 2176168404Spjd 2177219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2178168404Spjd 2179185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2180185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2181168404Spjd 2182185029Spjd if (!vd->vdev_ops->vdev_op_leaf) 2183185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2184185029Spjd 2185185029Spjd /* 2186185029Spjd * If the vdev is already faulted, then don't do anything. 2187185029Spjd */ 2188185029Spjd if (vd->vdev_faulted || vd->vdev_degraded) 2189185029Spjd return (spa_vdev_state_exit(spa, NULL, 0)); 2190185029Spjd 2191185029Spjd vd->vdev_degraded = 1ULL; 2192185029Spjd if (!vdev_is_dead(vd)) 2193185029Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, 2194219089Spjd aux); 2195185029Spjd 2196185029Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2197168404Spjd} 2198168404Spjd 2199185029Spjd/* 2200251631Sdelphij * Online the given vdev. 2201251631Sdelphij * 2202251631Sdelphij * If 'ZFS_ONLINE_UNSPARE' is set, it implies two things. First, any attached 2203251631Sdelphij * spare device should be detached when the device finishes resilvering. 2204251631Sdelphij * Second, the online should be treated like a 'test' online case, so no FMA 2205251631Sdelphij * events are generated if the device fails to open. 2206185029Spjd */ 2207168404Spjdint 2208185029Spjdvdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) 2209168404Spjd{ 2210219089Spjd vdev_t *vd, *tvd, *pvd, *rvd = spa->spa_root_vdev; 2211168404Spjd 2212219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2213168404Spjd 2214185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2215185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2216168404Spjd 2217168404Spjd if (!vd->vdev_ops->vdev_op_leaf) 2218185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2219168404Spjd 2220219089Spjd tvd = vd->vdev_top; 2221168404Spjd vd->vdev_offline = B_FALSE; 2222168404Spjd vd->vdev_tmpoffline = B_FALSE; 2223185029Spjd vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); 2224185029Spjd vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); 2225219089Spjd 2226219089Spjd /* XXX - L2ARC 1.0 does not support expansion */ 2227219089Spjd if (!vd->vdev_aux) { 2228219089Spjd for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2229219089Spjd pvd->vdev_expanding = !!(flags & ZFS_ONLINE_EXPAND); 2230219089Spjd } 2231219089Spjd 2232219089Spjd vdev_reopen(tvd); 2233185029Spjd vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; 2234168404Spjd 2235219089Spjd if (!vd->vdev_aux) { 2236219089Spjd for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2237219089Spjd pvd->vdev_expanding = B_FALSE; 2238219089Spjd } 2239219089Spjd 2240185029Spjd if (newstate) 2241185029Spjd *newstate = vd->vdev_state; 2242185029Spjd if ((flags & ZFS_ONLINE_UNSPARE) && 2243185029Spjd !vdev_is_dead(vd) && vd->vdev_parent && 2244185029Spjd vd->vdev_parent->vdev_ops == &vdev_spare_ops && 2245185029Spjd vd->vdev_parent->vdev_child[0] == vd) 2246185029Spjd vd->vdev_unspare = B_TRUE; 2247168404Spjd 2248219089Spjd if ((flags & ZFS_ONLINE_EXPAND) || spa->spa_autoexpand) { 2249219089Spjd 2250219089Spjd /* XXX - L2ARC 1.0 does not support expansion */ 2251219089Spjd if (vd->vdev_aux) 2252219089Spjd return (spa_vdev_state_exit(spa, vd, ENOTSUP)); 2253219089Spjd spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2254219089Spjd } 2255209962Smm return (spa_vdev_state_exit(spa, vd, 0)); 2256168404Spjd} 2257168404Spjd 2258219089Spjdstatic int 2259219089Spjdvdev_offline_locked(spa_t *spa, uint64_t guid, uint64_t flags) 2260168404Spjd{ 2261213197Smm vdev_t *vd, *tvd; 2262219089Spjd int error = 0; 2263219089Spjd uint64_t generation; 2264219089Spjd metaslab_group_t *mg; 2265168404Spjd 2266219089Spjdtop: 2267219089Spjd spa_vdev_state_enter(spa, SCL_ALLOC); 2268168404Spjd 2269185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2270185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2271168404Spjd 2272168404Spjd if (!vd->vdev_ops->vdev_op_leaf) 2273185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2274168404Spjd 2275213197Smm tvd = vd->vdev_top; 2276219089Spjd mg = tvd->vdev_mg; 2277219089Spjd generation = spa->spa_config_generation + 1; 2278213197Smm 2279168404Spjd /* 2280168404Spjd * If the device isn't already offline, try to offline it. 2281168404Spjd */ 2282168404Spjd if (!vd->vdev_offline) { 2283168404Spjd /* 2284209962Smm * If this device has the only valid copy of some data, 2285213197Smm * don't allow it to be offlined. Log devices are always 2286213197Smm * expendable. 2287168404Spjd */ 2288213197Smm if (!tvd->vdev_islog && vd->vdev_aux == NULL && 2289213197Smm vdev_dtl_required(vd)) 2290185029Spjd return (spa_vdev_state_exit(spa, NULL, EBUSY)); 2291168404Spjd 2292168404Spjd /* 2293219089Spjd * If the top-level is a slog and it has had allocations 2294219089Spjd * then proceed. We check that the vdev's metaslab group 2295219089Spjd * is not NULL since it's possible that we may have just 2296219089Spjd * added this vdev but not yet initialized its metaslabs. 2297219089Spjd */ 2298219089Spjd if (tvd->vdev_islog && mg != NULL) { 2299219089Spjd /* 2300219089Spjd * Prevent any future allocations. 2301219089Spjd */ 2302219089Spjd metaslab_group_passivate(mg); 2303219089Spjd (void) spa_vdev_state_exit(spa, vd, 0); 2304219089Spjd 2305219089Spjd error = spa_offline_log(spa); 2306219089Spjd 2307219089Spjd spa_vdev_state_enter(spa, SCL_ALLOC); 2308219089Spjd 2309219089Spjd /* 2310219089Spjd * Check to see if the config has changed. 2311219089Spjd */ 2312219089Spjd if (error || generation != spa->spa_config_generation) { 2313219089Spjd metaslab_group_activate(mg); 2314219089Spjd if (error) 2315219089Spjd return (spa_vdev_state_exit(spa, 2316219089Spjd vd, error)); 2317219089Spjd (void) spa_vdev_state_exit(spa, vd, 0); 2318219089Spjd goto top; 2319219089Spjd } 2320240415Smm ASSERT0(tvd->vdev_stat.vs_alloc); 2321219089Spjd } 2322219089Spjd 2323219089Spjd /* 2324168404Spjd * Offline this device and reopen its top-level vdev. 2325213197Smm * If the top-level vdev is a log device then just offline 2326213197Smm * it. Otherwise, if this action results in the top-level 2327213197Smm * vdev becoming unusable, undo it and fail the request. 2328168404Spjd */ 2329168404Spjd vd->vdev_offline = B_TRUE; 2330213197Smm vdev_reopen(tvd); 2331213197Smm 2332213197Smm if (!tvd->vdev_islog && vd->vdev_aux == NULL && 2333213197Smm vdev_is_dead(tvd)) { 2334168404Spjd vd->vdev_offline = B_FALSE; 2335213197Smm vdev_reopen(tvd); 2336185029Spjd return (spa_vdev_state_exit(spa, NULL, EBUSY)); 2337168404Spjd } 2338219089Spjd 2339219089Spjd /* 2340219089Spjd * Add the device back into the metaslab rotor so that 2341219089Spjd * once we online the device it's open for business. 2342219089Spjd */ 2343219089Spjd if (tvd->vdev_islog && mg != NULL) 2344219089Spjd metaslab_group_activate(mg); 2345168404Spjd } 2346168404Spjd 2347185029Spjd vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); 2348168404Spjd 2349219089Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2350219089Spjd} 2351213197Smm 2352219089Spjdint 2353219089Spjdvdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) 2354219089Spjd{ 2355219089Spjd int error; 2356213197Smm 2357219089Spjd mutex_enter(&spa->spa_vdev_top_lock); 2358219089Spjd error = vdev_offline_locked(spa, guid, flags); 2359219089Spjd mutex_exit(&spa->spa_vdev_top_lock); 2360219089Spjd 2361219089Spjd return (error); 2362168404Spjd} 2363168404Spjd 2364168404Spjd/* 2365168404Spjd * Clear the error counts associated with this vdev. Unlike vdev_online() and 2366168404Spjd * vdev_offline(), we assume the spa config is locked. We also clear all 2367168404Spjd * children. If 'vd' is NULL, then the user wants to clear all vdevs. 2368168404Spjd */ 2369168404Spjdvoid 2370168404Spjdvdev_clear(spa_t *spa, vdev_t *vd) 2371168404Spjd{ 2372185029Spjd vdev_t *rvd = spa->spa_root_vdev; 2373168404Spjd 2374185029Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 2375185029Spjd 2376168404Spjd if (vd == NULL) 2377185029Spjd vd = rvd; 2378168404Spjd 2379168404Spjd vd->vdev_stat.vs_read_errors = 0; 2380168404Spjd vd->vdev_stat.vs_write_errors = 0; 2381168404Spjd vd->vdev_stat.vs_checksum_errors = 0; 2382168404Spjd 2383185029Spjd for (int c = 0; c < vd->vdev_children; c++) 2384168404Spjd vdev_clear(spa, vd->vdev_child[c]); 2385185029Spjd 2386253991Smav if (vd == rvd) { 2387253991Smav for (int c = 0; c < spa->spa_l2cache.sav_count; c++) 2388253991Smav vdev_clear(spa, spa->spa_l2cache.sav_vdevs[c]); 2389253991Smav 2390253991Smav for (int c = 0; c < spa->spa_spares.sav_count; c++) 2391253991Smav vdev_clear(spa, spa->spa_spares.sav_vdevs[c]); 2392253991Smav } 2393253991Smav 2394185029Spjd /* 2395185029Spjd * If we're in the FAULTED state or have experienced failed I/O, then 2396185029Spjd * clear the persistent state and attempt to reopen the device. We 2397185029Spjd * also mark the vdev config dirty, so that the new faulted state is 2398185029Spjd * written out to disk. 2399185029Spjd */ 2400185029Spjd if (vd->vdev_faulted || vd->vdev_degraded || 2401185029Spjd !vdev_readable(vd) || !vdev_writeable(vd)) { 2402185029Spjd 2403219089Spjd /* 2404219089Spjd * When reopening in reponse to a clear event, it may be due to 2405219089Spjd * a fmadm repair request. In this case, if the device is 2406219089Spjd * still broken, we want to still post the ereport again. 2407219089Spjd */ 2408219089Spjd vd->vdev_forcefault = B_TRUE; 2409219089Spjd 2410219089Spjd vd->vdev_faulted = vd->vdev_degraded = 0ULL; 2411185029Spjd vd->vdev_cant_read = B_FALSE; 2412185029Spjd vd->vdev_cant_write = B_FALSE; 2413185029Spjd 2414219089Spjd vdev_reopen(vd == rvd ? rvd : vd->vdev_top); 2415185029Spjd 2416219089Spjd vd->vdev_forcefault = B_FALSE; 2417219089Spjd 2418219089Spjd if (vd != rvd && vdev_writeable(vd->vdev_top)) 2419185029Spjd vdev_state_dirty(vd->vdev_top); 2420185029Spjd 2421185029Spjd if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) 2422185029Spjd spa_async_request(spa, SPA_ASYNC_RESILVER); 2423185029Spjd 2424185029Spjd spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR); 2425185029Spjd } 2426219089Spjd 2427219089Spjd /* 2428219089Spjd * When clearing a FMA-diagnosed fault, we always want to 2429219089Spjd * unspare the device, as we assume that the original spare was 2430219089Spjd * done in response to the FMA fault. 2431219089Spjd */ 2432219089Spjd if (!vdev_is_dead(vd) && vd->vdev_parent != NULL && 2433219089Spjd vd->vdev_parent->vdev_ops == &vdev_spare_ops && 2434219089Spjd vd->vdev_parent->vdev_child[0] == vd) 2435219089Spjd vd->vdev_unspare = B_TRUE; 2436168404Spjd} 2437168404Spjd 2438185029Spjdboolean_t 2439168404Spjdvdev_is_dead(vdev_t *vd) 2440168404Spjd{ 2441219089Spjd /* 2442219089Spjd * Holes and missing devices are always considered "dead". 2443219089Spjd * This simplifies the code since we don't have to check for 2444219089Spjd * these types of devices in the various code paths. 2445219089Spjd * Instead we rely on the fact that we skip over dead devices 2446219089Spjd * before issuing I/O to them. 2447219089Spjd */ 2448219089Spjd return (vd->vdev_state < VDEV_STATE_DEGRADED || vd->vdev_ishole || 2449219089Spjd vd->vdev_ops == &vdev_missing_ops); 2450168404Spjd} 2451168404Spjd 2452185029Spjdboolean_t 2453185029Spjdvdev_readable(vdev_t *vd) 2454168404Spjd{ 2455185029Spjd return (!vdev_is_dead(vd) && !vd->vdev_cant_read); 2456185029Spjd} 2457168404Spjd 2458185029Spjdboolean_t 2459185029Spjdvdev_writeable(vdev_t *vd) 2460185029Spjd{ 2461185029Spjd return (!vdev_is_dead(vd) && !vd->vdev_cant_write); 2462185029Spjd} 2463168404Spjd 2464185029Spjdboolean_t 2465208370Smmvdev_allocatable(vdev_t *vd) 2466208370Smm{ 2467209962Smm uint64_t state = vd->vdev_state; 2468209962Smm 2469208370Smm /* 2470209962Smm * We currently allow allocations from vdevs which may be in the 2471208370Smm * process of reopening (i.e. VDEV_STATE_CLOSED). If the device 2472208370Smm * fails to reopen then we'll catch it later when we're holding 2473209962Smm * the proper locks. Note that we have to get the vdev state 2474209962Smm * in a local variable because although it changes atomically, 2475209962Smm * we're asking two separate questions about it. 2476208370Smm */ 2477209962Smm return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) && 2478219089Spjd !vd->vdev_cant_write && !vd->vdev_ishole); 2479208370Smm} 2480208370Smm 2481208370Smmboolean_t 2482185029Spjdvdev_accessible(vdev_t *vd, zio_t *zio) 2483185029Spjd{ 2484185029Spjd ASSERT(zio->io_vd == vd); 2485168404Spjd 2486185029Spjd if (vdev_is_dead(vd) || vd->vdev_remove_wanted) 2487185029Spjd return (B_FALSE); 2488168404Spjd 2489185029Spjd if (zio->io_type == ZIO_TYPE_READ) 2490185029Spjd return (!vd->vdev_cant_read); 2491168404Spjd 2492185029Spjd if (zio->io_type == ZIO_TYPE_WRITE) 2493185029Spjd return (!vd->vdev_cant_write); 2494168404Spjd 2495185029Spjd return (B_TRUE); 2496168404Spjd} 2497168404Spjd 2498168404Spjd/* 2499168404Spjd * Get statistics for the given vdev. 2500168404Spjd */ 2501168404Spjdvoid 2502168404Spjdvdev_get_stats(vdev_t *vd, vdev_stat_t *vs) 2503168404Spjd{ 2504168404Spjd vdev_t *rvd = vd->vdev_spa->spa_root_vdev; 2505168404Spjd 2506168404Spjd mutex_enter(&vd->vdev_stat_lock); 2507168404Spjd bcopy(&vd->vdev_stat, vs, sizeof (*vs)); 2508168404Spjd vs->vs_timestamp = gethrtime() - vs->vs_timestamp; 2509168404Spjd vs->vs_state = vd->vdev_state; 2510219089Spjd vs->vs_rsize = vdev_get_min_asize(vd); 2511219089Spjd if (vd->vdev_ops->vdev_op_leaf) 2512219089Spjd vs->vs_rsize += VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE; 2513236155Smm vs->vs_esize = vd->vdev_max_asize - vd->vdev_asize; 2514168404Spjd mutex_exit(&vd->vdev_stat_lock); 2515168404Spjd 2516168404Spjd /* 2517168404Spjd * If we're getting stats on the root vdev, aggregate the I/O counts 2518168404Spjd * over all top-level vdevs (i.e. the direct children of the root). 2519168404Spjd */ 2520168404Spjd if (vd == rvd) { 2521185029Spjd for (int c = 0; c < rvd->vdev_children; c++) { 2522168404Spjd vdev_t *cvd = rvd->vdev_child[c]; 2523168404Spjd vdev_stat_t *cvs = &cvd->vdev_stat; 2524168404Spjd 2525168404Spjd mutex_enter(&vd->vdev_stat_lock); 2526185029Spjd for (int t = 0; t < ZIO_TYPES; t++) { 2527168404Spjd vs->vs_ops[t] += cvs->vs_ops[t]; 2528168404Spjd vs->vs_bytes[t] += cvs->vs_bytes[t]; 2529168404Spjd } 2530219089Spjd cvs->vs_scan_removing = cvd->vdev_removing; 2531168404Spjd mutex_exit(&vd->vdev_stat_lock); 2532168404Spjd } 2533168404Spjd } 2534168404Spjd} 2535168404Spjd 2536168404Spjdvoid 2537185029Spjdvdev_clear_stats(vdev_t *vd) 2538168404Spjd{ 2539185029Spjd mutex_enter(&vd->vdev_stat_lock); 2540185029Spjd vd->vdev_stat.vs_space = 0; 2541185029Spjd vd->vdev_stat.vs_dspace = 0; 2542185029Spjd vd->vdev_stat.vs_alloc = 0; 2543185029Spjd mutex_exit(&vd->vdev_stat_lock); 2544185029Spjd} 2545185029Spjd 2546185029Spjdvoid 2547219089Spjdvdev_scan_stat_init(vdev_t *vd) 2548219089Spjd{ 2549219089Spjd vdev_stat_t *vs = &vd->vdev_stat; 2550219089Spjd 2551219089Spjd for (int c = 0; c < vd->vdev_children; c++) 2552219089Spjd vdev_scan_stat_init(vd->vdev_child[c]); 2553219089Spjd 2554219089Spjd mutex_enter(&vd->vdev_stat_lock); 2555219089Spjd vs->vs_scan_processed = 0; 2556219089Spjd mutex_exit(&vd->vdev_stat_lock); 2557219089Spjd} 2558219089Spjd 2559219089Spjdvoid 2560185029Spjdvdev_stat_update(zio_t *zio, uint64_t psize) 2561185029Spjd{ 2562209962Smm spa_t *spa = zio->io_spa; 2563209962Smm vdev_t *rvd = spa->spa_root_vdev; 2564185029Spjd vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; 2565168404Spjd vdev_t *pvd; 2566168404Spjd uint64_t txg = zio->io_txg; 2567168404Spjd vdev_stat_t *vs = &vd->vdev_stat; 2568168404Spjd zio_type_t type = zio->io_type; 2569168404Spjd int flags = zio->io_flags; 2570168404Spjd 2571185029Spjd /* 2572185029Spjd * If this i/o is a gang leader, it didn't do any actual work. 2573185029Spjd */ 2574185029Spjd if (zio->io_gang_tree) 2575185029Spjd return; 2576185029Spjd 2577168404Spjd if (zio->io_error == 0) { 2578185029Spjd /* 2579185029Spjd * If this is a root i/o, don't count it -- we've already 2580185029Spjd * counted the top-level vdevs, and vdev_get_stats() will 2581185029Spjd * aggregate them when asked. This reduces contention on 2582185029Spjd * the root vdev_stat_lock and implicitly handles blocks 2583185029Spjd * that compress away to holes, for which there is no i/o. 2584185029Spjd * (Holes never create vdev children, so all the counters 2585185029Spjd * remain zero, which is what we want.) 2586185029Spjd * 2587185029Spjd * Note: this only applies to successful i/o (io_error == 0) 2588185029Spjd * because unlike i/o counts, errors are not additive. 2589185029Spjd * When reading a ditto block, for example, failure of 2590185029Spjd * one top-level vdev does not imply a root-level error. 2591185029Spjd */ 2592185029Spjd if (vd == rvd) 2593185029Spjd return; 2594185029Spjd 2595185029Spjd ASSERT(vd == zio->io_vd); 2596209962Smm 2597209962Smm if (flags & ZIO_FLAG_IO_BYPASS) 2598209962Smm return; 2599209962Smm 2600209962Smm mutex_enter(&vd->vdev_stat_lock); 2601209962Smm 2602185029Spjd if (flags & ZIO_FLAG_IO_REPAIR) { 2603219089Spjd if (flags & ZIO_FLAG_SCAN_THREAD) { 2604219089Spjd dsl_scan_phys_t *scn_phys = 2605219089Spjd &spa->spa_dsl_pool->dp_scan->scn_phys; 2606219089Spjd uint64_t *processed = &scn_phys->scn_processed; 2607219089Spjd 2608219089Spjd /* XXX cleanup? */ 2609219089Spjd if (vd->vdev_ops->vdev_op_leaf) 2610219089Spjd atomic_add_64(processed, psize); 2611219089Spjd vs->vs_scan_processed += psize; 2612219089Spjd } 2613219089Spjd 2614209962Smm if (flags & ZIO_FLAG_SELF_HEAL) 2615185029Spjd vs->vs_self_healed += psize; 2616168404Spjd } 2617209962Smm 2618209962Smm vs->vs_ops[type]++; 2619209962Smm vs->vs_bytes[type] += psize; 2620209962Smm 2621209962Smm mutex_exit(&vd->vdev_stat_lock); 2622168404Spjd return; 2623168404Spjd } 2624168404Spjd 2625168404Spjd if (flags & ZIO_FLAG_SPECULATIVE) 2626168404Spjd return; 2627168404Spjd 2628213198Smm /* 2629213198Smm * If this is an I/O error that is going to be retried, then ignore the 2630213198Smm * error. Otherwise, the user may interpret B_FAILFAST I/O errors as 2631213198Smm * hard errors, when in reality they can happen for any number of 2632213198Smm * innocuous reasons (bus resets, MPxIO link failure, etc). 2633213198Smm */ 2634213198Smm if (zio->io_error == EIO && 2635213198Smm !(zio->io_flags & ZIO_FLAG_IO_RETRY)) 2636213198Smm return; 2637213198Smm 2638219089Spjd /* 2639219089Spjd * Intent logs writes won't propagate their error to the root 2640219089Spjd * I/O so don't mark these types of failures as pool-level 2641219089Spjd * errors. 2642219089Spjd */ 2643219089Spjd if (zio->io_vd == NULL && (zio->io_flags & ZIO_FLAG_DONT_PROPAGATE)) 2644219089Spjd return; 2645219089Spjd 2646185029Spjd mutex_enter(&vd->vdev_stat_lock); 2647209962Smm if (type == ZIO_TYPE_READ && !vdev_is_dead(vd)) { 2648185029Spjd if (zio->io_error == ECKSUM) 2649185029Spjd vs->vs_checksum_errors++; 2650185029Spjd else 2651185029Spjd vs->vs_read_errors++; 2652168404Spjd } 2653209962Smm if (type == ZIO_TYPE_WRITE && !vdev_is_dead(vd)) 2654185029Spjd vs->vs_write_errors++; 2655185029Spjd mutex_exit(&vd->vdev_stat_lock); 2656168404Spjd 2657209962Smm if (type == ZIO_TYPE_WRITE && txg != 0 && 2658209962Smm (!(flags & ZIO_FLAG_IO_REPAIR) || 2659219089Spjd (flags & ZIO_FLAG_SCAN_THREAD) || 2660219089Spjd spa->spa_claiming)) { 2661209962Smm /* 2662219089Spjd * This is either a normal write (not a repair), or it's 2663219089Spjd * a repair induced by the scrub thread, or it's a repair 2664219089Spjd * made by zil_claim() during spa_load() in the first txg. 2665219089Spjd * In the normal case, we commit the DTL change in the same 2666219089Spjd * txg as the block was born. In the scrub-induced repair 2667219089Spjd * case, we know that scrubs run in first-pass syncing context, 2668219089Spjd * so we commit the DTL change in spa_syncing_txg(spa). 2669219089Spjd * In the zil_claim() case, we commit in spa_first_txg(spa). 2670209962Smm * 2671209962Smm * We currently do not make DTL entries for failed spontaneous 2672209962Smm * self-healing writes triggered by normal (non-scrubbing) 2673209962Smm * reads, because we have no transactional context in which to 2674209962Smm * do so -- and it's not clear that it'd be desirable anyway. 2675209962Smm */ 2676209962Smm if (vd->vdev_ops->vdev_op_leaf) { 2677209962Smm uint64_t commit_txg = txg; 2678219089Spjd if (flags & ZIO_FLAG_SCAN_THREAD) { 2679209962Smm ASSERT(flags & ZIO_FLAG_IO_REPAIR); 2680209962Smm ASSERT(spa_sync_pass(spa) == 1); 2681209962Smm vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1); 2682219089Spjd commit_txg = spa_syncing_txg(spa); 2683219089Spjd } else if (spa->spa_claiming) { 2684219089Spjd ASSERT(flags & ZIO_FLAG_IO_REPAIR); 2685219089Spjd commit_txg = spa_first_txg(spa); 2686209962Smm } 2687219089Spjd ASSERT(commit_txg >= spa_syncing_txg(spa)); 2688209962Smm if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1)) 2689168404Spjd return; 2690209962Smm for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2691209962Smm vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1); 2692209962Smm vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg); 2693168404Spjd } 2694209962Smm if (vd != rvd) 2695209962Smm vdev_dtl_dirty(vd, DTL_MISSING, txg, 1); 2696168404Spjd } 2697168404Spjd} 2698168404Spjd 2699168404Spjd/* 2700219089Spjd * Update the in-core space usage stats for this vdev, its metaslab class, 2701219089Spjd * and the root vdev. 2702168404Spjd */ 2703168404Spjdvoid 2704219089Spjdvdev_space_update(vdev_t *vd, int64_t alloc_delta, int64_t defer_delta, 2705219089Spjd int64_t space_delta) 2706168404Spjd{ 2707168404Spjd int64_t dspace_delta = space_delta; 2708185029Spjd spa_t *spa = vd->vdev_spa; 2709185029Spjd vdev_t *rvd = spa->spa_root_vdev; 2710219089Spjd metaslab_group_t *mg = vd->vdev_mg; 2711219089Spjd metaslab_class_t *mc = mg ? mg->mg_class : NULL; 2712168404Spjd 2713185029Spjd ASSERT(vd == vd->vdev_top); 2714168404Spjd 2715185029Spjd /* 2716185029Spjd * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion 2717185029Spjd * factor. We must calculate this here and not at the root vdev 2718185029Spjd * because the root vdev's psize-to-asize is simply the max of its 2719185029Spjd * childrens', thus not accurate enough for us. 2720185029Spjd */ 2721185029Spjd ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); 2722213197Smm ASSERT(vd->vdev_deflate_ratio != 0 || vd->vdev_isl2cache); 2723185029Spjd dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * 2724185029Spjd vd->vdev_deflate_ratio; 2725185029Spjd 2726185029Spjd mutex_enter(&vd->vdev_stat_lock); 2727219089Spjd vd->vdev_stat.vs_alloc += alloc_delta; 2728185029Spjd vd->vdev_stat.vs_space += space_delta; 2729185029Spjd vd->vdev_stat.vs_dspace += dspace_delta; 2730185029Spjd mutex_exit(&vd->vdev_stat_lock); 2731185029Spjd 2732219089Spjd if (mc == spa_normal_class(spa)) { 2733185029Spjd mutex_enter(&rvd->vdev_stat_lock); 2734219089Spjd rvd->vdev_stat.vs_alloc += alloc_delta; 2735185029Spjd rvd->vdev_stat.vs_space += space_delta; 2736185029Spjd rvd->vdev_stat.vs_dspace += dspace_delta; 2737185029Spjd mutex_exit(&rvd->vdev_stat_lock); 2738185029Spjd } 2739219089Spjd 2740219089Spjd if (mc != NULL) { 2741219089Spjd ASSERT(rvd == vd->vdev_parent); 2742219089Spjd ASSERT(vd->vdev_ms_count != 0); 2743219089Spjd 2744219089Spjd metaslab_class_space_update(mc, 2745219089Spjd alloc_delta, defer_delta, space_delta, dspace_delta); 2746219089Spjd } 2747168404Spjd} 2748168404Spjd 2749168404Spjd/* 2750168404Spjd * Mark a top-level vdev's config as dirty, placing it on the dirty list 2751168404Spjd * so that it will be written out next time the vdev configuration is synced. 2752168404Spjd * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. 2753168404Spjd */ 2754168404Spjdvoid 2755168404Spjdvdev_config_dirty(vdev_t *vd) 2756168404Spjd{ 2757168404Spjd spa_t *spa = vd->vdev_spa; 2758168404Spjd vdev_t *rvd = spa->spa_root_vdev; 2759168404Spjd int c; 2760168404Spjd 2761219089Spjd ASSERT(spa_writeable(spa)); 2762219089Spjd 2763168404Spjd /* 2764209962Smm * If this is an aux vdev (as with l2cache and spare devices), then we 2765209962Smm * update the vdev config manually and set the sync flag. 2766185029Spjd */ 2767185029Spjd if (vd->vdev_aux != NULL) { 2768185029Spjd spa_aux_vdev_t *sav = vd->vdev_aux; 2769185029Spjd nvlist_t **aux; 2770185029Spjd uint_t naux; 2771185029Spjd 2772185029Spjd for (c = 0; c < sav->sav_count; c++) { 2773185029Spjd if (sav->sav_vdevs[c] == vd) 2774185029Spjd break; 2775185029Spjd } 2776185029Spjd 2777185029Spjd if (c == sav->sav_count) { 2778185029Spjd /* 2779185029Spjd * We're being removed. There's nothing more to do. 2780185029Spjd */ 2781185029Spjd ASSERT(sav->sav_sync == B_TRUE); 2782185029Spjd return; 2783185029Spjd } 2784185029Spjd 2785185029Spjd sav->sav_sync = B_TRUE; 2786185029Spjd 2787209962Smm if (nvlist_lookup_nvlist_array(sav->sav_config, 2788209962Smm ZPOOL_CONFIG_L2CACHE, &aux, &naux) != 0) { 2789209962Smm VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 2790209962Smm ZPOOL_CONFIG_SPARES, &aux, &naux) == 0); 2791209962Smm } 2792185029Spjd 2793185029Spjd ASSERT(c < naux); 2794185029Spjd 2795185029Spjd /* 2796185029Spjd * Setting the nvlist in the middle if the array is a little 2797185029Spjd * sketchy, but it will work. 2798185029Spjd */ 2799185029Spjd nvlist_free(aux[c]); 2800219089Spjd aux[c] = vdev_config_generate(spa, vd, B_TRUE, 0); 2801185029Spjd 2802185029Spjd return; 2803185029Spjd } 2804185029Spjd 2805185029Spjd /* 2806185029Spjd * The dirty list is protected by the SCL_CONFIG lock. The caller 2807185029Spjd * must either hold SCL_CONFIG as writer, or must be the sync thread 2808185029Spjd * (which holds SCL_CONFIG as reader). There's only one sync thread, 2809168404Spjd * so this is sufficient to ensure mutual exclusion. 2810168404Spjd */ 2811185029Spjd ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 2812185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2813185029Spjd spa_config_held(spa, SCL_CONFIG, RW_READER))); 2814168404Spjd 2815168404Spjd if (vd == rvd) { 2816168404Spjd for (c = 0; c < rvd->vdev_children; c++) 2817168404Spjd vdev_config_dirty(rvd->vdev_child[c]); 2818168404Spjd } else { 2819168404Spjd ASSERT(vd == vd->vdev_top); 2820168404Spjd 2821219089Spjd if (!list_link_active(&vd->vdev_config_dirty_node) && 2822219089Spjd !vd->vdev_ishole) 2823185029Spjd list_insert_head(&spa->spa_config_dirty_list, vd); 2824168404Spjd } 2825168404Spjd} 2826168404Spjd 2827168404Spjdvoid 2828168404Spjdvdev_config_clean(vdev_t *vd) 2829168404Spjd{ 2830168404Spjd spa_t *spa = vd->vdev_spa; 2831168404Spjd 2832185029Spjd ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 2833185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2834185029Spjd spa_config_held(spa, SCL_CONFIG, RW_READER))); 2835168404Spjd 2836185029Spjd ASSERT(list_link_active(&vd->vdev_config_dirty_node)); 2837185029Spjd list_remove(&spa->spa_config_dirty_list, vd); 2838168404Spjd} 2839168404Spjd 2840185029Spjd/* 2841185029Spjd * Mark a top-level vdev's state as dirty, so that the next pass of 2842185029Spjd * spa_sync() can convert this into vdev_config_dirty(). We distinguish 2843185029Spjd * the state changes from larger config changes because they require 2844185029Spjd * much less locking, and are often needed for administrative actions. 2845185029Spjd */ 2846168404Spjdvoid 2847185029Spjdvdev_state_dirty(vdev_t *vd) 2848185029Spjd{ 2849185029Spjd spa_t *spa = vd->vdev_spa; 2850185029Spjd 2851219089Spjd ASSERT(spa_writeable(spa)); 2852185029Spjd ASSERT(vd == vd->vdev_top); 2853185029Spjd 2854185029Spjd /* 2855185029Spjd * The state list is protected by the SCL_STATE lock. The caller 2856185029Spjd * must either hold SCL_STATE as writer, or must be the sync thread 2857185029Spjd * (which holds SCL_STATE as reader). There's only one sync thread, 2858185029Spjd * so this is sufficient to ensure mutual exclusion. 2859185029Spjd */ 2860185029Spjd ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 2861185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2862185029Spjd spa_config_held(spa, SCL_STATE, RW_READER))); 2863185029Spjd 2864219089Spjd if (!list_link_active(&vd->vdev_state_dirty_node) && !vd->vdev_ishole) 2865185029Spjd list_insert_head(&spa->spa_state_dirty_list, vd); 2866185029Spjd} 2867185029Spjd 2868185029Spjdvoid 2869185029Spjdvdev_state_clean(vdev_t *vd) 2870185029Spjd{ 2871185029Spjd spa_t *spa = vd->vdev_spa; 2872185029Spjd 2873185029Spjd ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 2874185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 2875185029Spjd spa_config_held(spa, SCL_STATE, RW_READER))); 2876185029Spjd 2877185029Spjd ASSERT(list_link_active(&vd->vdev_state_dirty_node)); 2878185029Spjd list_remove(&spa->spa_state_dirty_list, vd); 2879185029Spjd} 2880185029Spjd 2881185029Spjd/* 2882185029Spjd * Propagate vdev state up from children to parent. 2883185029Spjd */ 2884185029Spjdvoid 2885168404Spjdvdev_propagate_state(vdev_t *vd) 2886168404Spjd{ 2887209962Smm spa_t *spa = vd->vdev_spa; 2888209962Smm vdev_t *rvd = spa->spa_root_vdev; 2889168404Spjd int degraded = 0, faulted = 0; 2890168404Spjd int corrupted = 0; 2891168404Spjd vdev_t *child; 2892168404Spjd 2893185029Spjd if (vd->vdev_children > 0) { 2894219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 2895185029Spjd child = vd->vdev_child[c]; 2896168404Spjd 2897219089Spjd /* 2898219089Spjd * Don't factor holes into the decision. 2899219089Spjd */ 2900219089Spjd if (child->vdev_ishole) 2901219089Spjd continue; 2902219089Spjd 2903185029Spjd if (!vdev_readable(child) || 2904209962Smm (!vdev_writeable(child) && spa_writeable(spa))) { 2905185029Spjd /* 2906185029Spjd * Root special: if there is a top-level log 2907185029Spjd * device, treat the root vdev as if it were 2908185029Spjd * degraded. 2909185029Spjd */ 2910185029Spjd if (child->vdev_islog && vd == rvd) 2911185029Spjd degraded++; 2912185029Spjd else 2913185029Spjd faulted++; 2914185029Spjd } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { 2915185029Spjd degraded++; 2916185029Spjd } 2917185029Spjd 2918185029Spjd if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) 2919185029Spjd corrupted++; 2920185029Spjd } 2921185029Spjd 2922185029Spjd vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); 2923185029Spjd 2924185029Spjd /* 2925185029Spjd * Root special: if there is a top-level vdev that cannot be 2926185029Spjd * opened due to corrupted metadata, then propagate the root 2927185029Spjd * vdev's aux state as 'corrupt' rather than 'insufficient 2928185029Spjd * replicas'. 2929185029Spjd */ 2930185029Spjd if (corrupted && vd == rvd && 2931185029Spjd rvd->vdev_state == VDEV_STATE_CANT_OPEN) 2932185029Spjd vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, 2933185029Spjd VDEV_AUX_CORRUPT_DATA); 2934168404Spjd } 2935168404Spjd 2936185029Spjd if (vd->vdev_parent) 2937185029Spjd vdev_propagate_state(vd->vdev_parent); 2938168404Spjd} 2939168404Spjd 2940168404Spjd/* 2941168404Spjd * Set a vdev's state. If this is during an open, we don't update the parent 2942168404Spjd * state, because we're in the process of opening children depth-first. 2943168404Spjd * Otherwise, we propagate the change to the parent. 2944168404Spjd * 2945168404Spjd * If this routine places a device in a faulted state, an appropriate ereport is 2946168404Spjd * generated. 2947168404Spjd */ 2948168404Spjdvoid 2949168404Spjdvdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) 2950168404Spjd{ 2951168404Spjd uint64_t save_state; 2952185029Spjd spa_t *spa = vd->vdev_spa; 2953168404Spjd 2954168404Spjd if (state == vd->vdev_state) { 2955168404Spjd vd->vdev_stat.vs_aux = aux; 2956168404Spjd return; 2957168404Spjd } 2958168404Spjd 2959168404Spjd save_state = vd->vdev_state; 2960168404Spjd 2961168404Spjd vd->vdev_state = state; 2962168404Spjd vd->vdev_stat.vs_aux = aux; 2963168404Spjd 2964173373Spjd /* 2965173373Spjd * If we are setting the vdev state to anything but an open state, then 2966219089Spjd * always close the underlying device unless the device has requested 2967219089Spjd * a delayed close (i.e. we're about to remove or fault the device). 2968219089Spjd * Otherwise, we keep accessible but invalid devices open forever. 2969219089Spjd * We don't call vdev_close() itself, because that implies some extra 2970219089Spjd * checks (offline, etc) that we don't want here. This is limited to 2971219089Spjd * leaf devices, because otherwise closing the device will affect other 2972219089Spjd * children. 2973173373Spjd */ 2974219089Spjd if (!vd->vdev_delayed_close && vdev_is_dead(vd) && 2975219089Spjd vd->vdev_ops->vdev_op_leaf) 2976173373Spjd vd->vdev_ops->vdev_op_close(vd); 2977173373Spjd 2978219089Spjd /* 2979219089Spjd * If we have brought this vdev back into service, we need 2980219089Spjd * to notify fmd so that it can gracefully repair any outstanding 2981219089Spjd * cases due to a missing device. We do this in all cases, even those 2982219089Spjd * that probably don't correlate to a repaired fault. This is sure to 2983219089Spjd * catch all cases, and we let the zfs-retire agent sort it out. If 2984219089Spjd * this is a transient state it's OK, as the retire agent will 2985219089Spjd * double-check the state of the vdev before repairing it. 2986219089Spjd */ 2987219089Spjd if (state == VDEV_STATE_HEALTHY && vd->vdev_ops->vdev_op_leaf && 2988219089Spjd vd->vdev_prevstate != state) 2989219089Spjd zfs_post_state_change(spa, vd); 2990219089Spjd 2991185029Spjd if (vd->vdev_removed && 2992185029Spjd state == VDEV_STATE_CANT_OPEN && 2993185029Spjd (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { 2994168404Spjd /* 2995185029Spjd * If the previous state is set to VDEV_STATE_REMOVED, then this 2996185029Spjd * device was previously marked removed and someone attempted to 2997185029Spjd * reopen it. If this failed due to a nonexistent device, then 2998185029Spjd * keep the device in the REMOVED state. We also let this be if 2999185029Spjd * it is one of our special test online cases, which is only 3000185029Spjd * attempting to online the device and shouldn't generate an FMA 3001185029Spjd * fault. 3002185029Spjd */ 3003185029Spjd vd->vdev_state = VDEV_STATE_REMOVED; 3004185029Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 3005185029Spjd } else if (state == VDEV_STATE_REMOVED) { 3006185029Spjd vd->vdev_removed = B_TRUE; 3007185029Spjd } else if (state == VDEV_STATE_CANT_OPEN) { 3008185029Spjd /* 3009219089Spjd * If we fail to open a vdev during an import or recovery, we 3010219089Spjd * mark it as "not available", which signifies that it was 3011219089Spjd * never there to begin with. Failure to open such a device 3012219089Spjd * is not considered an error. 3013168404Spjd */ 3014219089Spjd if ((spa_load_state(spa) == SPA_LOAD_IMPORT || 3015219089Spjd spa_load_state(spa) == SPA_LOAD_RECOVER) && 3016168404Spjd vd->vdev_ops->vdev_op_leaf) 3017168404Spjd vd->vdev_not_present = 1; 3018168404Spjd 3019168404Spjd /* 3020168404Spjd * Post the appropriate ereport. If the 'prevstate' field is 3021168404Spjd * set to something other than VDEV_STATE_UNKNOWN, it indicates 3022168404Spjd * that this is part of a vdev_reopen(). In this case, we don't 3023168404Spjd * want to post the ereport if the device was already in the 3024168404Spjd * CANT_OPEN state beforehand. 3025185029Spjd * 3026185029Spjd * If the 'checkremove' flag is set, then this is an attempt to 3027185029Spjd * online the device in response to an insertion event. If we 3028185029Spjd * hit this case, then we have detected an insertion event for a 3029185029Spjd * faulted or offline device that wasn't in the removed state. 3030185029Spjd * In this scenario, we don't post an ereport because we are 3031185029Spjd * about to replace the device, or attempt an online with 3032185029Spjd * vdev_forcefault, which will generate the fault for us. 3033168404Spjd */ 3034185029Spjd if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && 3035185029Spjd !vd->vdev_not_present && !vd->vdev_checkremove && 3036185029Spjd vd != spa->spa_root_vdev) { 3037168404Spjd const char *class; 3038168404Spjd 3039168404Spjd switch (aux) { 3040168404Spjd case VDEV_AUX_OPEN_FAILED: 3041168404Spjd class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; 3042168404Spjd break; 3043168404Spjd case VDEV_AUX_CORRUPT_DATA: 3044168404Spjd class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; 3045168404Spjd break; 3046168404Spjd case VDEV_AUX_NO_REPLICAS: 3047168404Spjd class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; 3048168404Spjd break; 3049168404Spjd case VDEV_AUX_BAD_GUID_SUM: 3050168404Spjd class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; 3051168404Spjd break; 3052168404Spjd case VDEV_AUX_TOO_SMALL: 3053168404Spjd class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; 3054168404Spjd break; 3055168404Spjd case VDEV_AUX_BAD_LABEL: 3056168404Spjd class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; 3057168404Spjd break; 3058168404Spjd default: 3059168404Spjd class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; 3060168404Spjd } 3061168404Spjd 3062185029Spjd zfs_ereport_post(class, spa, vd, NULL, save_state, 0); 3063168404Spjd } 3064185029Spjd 3065185029Spjd /* Erase any notion of persistent removed state */ 3066185029Spjd vd->vdev_removed = B_FALSE; 3067185029Spjd } else { 3068185029Spjd vd->vdev_removed = B_FALSE; 3069168404Spjd } 3070168404Spjd 3071209962Smm if (!isopen && vd->vdev_parent) 3072209962Smm vdev_propagate_state(vd->vdev_parent); 3073185029Spjd} 3074168404Spjd 3075185029Spjd/* 3076185029Spjd * Check the vdev configuration to ensure that it's capable of supporting 3077193163Sdfr * a root pool. 3078193163Sdfr * 3079193163Sdfr * On Solaris, we do not support RAID-Z or partial configuration. In 3080193163Sdfr * addition, only a single top-level vdev is allowed and none of the 3081193163Sdfr * leaves can be wholedisks. 3082193163Sdfr * 3083193163Sdfr * For FreeBSD, we can boot from any configuration. There is a 3084193163Sdfr * limitation that the boot filesystem must be either uncompressed or 3085193163Sdfr * compresses with lzjb compression but I'm not sure how to enforce 3086193163Sdfr * that here. 3087185029Spjd */ 3088185029Spjdboolean_t 3089185029Spjdvdev_is_bootable(vdev_t *vd) 3090185029Spjd{ 3091213197Smm#ifdef sun 3092185029Spjd if (!vd->vdev_ops->vdev_op_leaf) { 3093185029Spjd char *vdev_type = vd->vdev_ops->vdev_op_type; 3094185029Spjd 3095185029Spjd if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 && 3096185029Spjd vd->vdev_children > 1) { 3097185029Spjd return (B_FALSE); 3098185029Spjd } else if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 || 3099185029Spjd strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) { 3100185029Spjd return (B_FALSE); 3101185029Spjd } 3102185029Spjd } else if (vd->vdev_wholedisk == 1) { 3103185029Spjd return (B_FALSE); 3104185029Spjd } 3105185029Spjd 3106219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 3107185029Spjd if (!vdev_is_bootable(vd->vdev_child[c])) 3108185029Spjd return (B_FALSE); 3109185029Spjd } 3110213197Smm#endif /* sun */ 3111185029Spjd return (B_TRUE); 3112168404Spjd} 3113213197Smm 3114219089Spjd/* 3115219089Spjd * Load the state from the original vdev tree (ovd) which 3116219089Spjd * we've retrieved from the MOS config object. If the original 3117219089Spjd * vdev was offline or faulted then we transfer that state to the 3118219089Spjd * device in the current vdev tree (nvd). 3119219089Spjd */ 3120213197Smmvoid 3121219089Spjdvdev_load_log_state(vdev_t *nvd, vdev_t *ovd) 3122213197Smm{ 3123219089Spjd spa_t *spa = nvd->vdev_spa; 3124213197Smm 3125219089Spjd ASSERT(nvd->vdev_top->vdev_islog); 3126219089Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 3127219089Spjd ASSERT3U(nvd->vdev_guid, ==, ovd->vdev_guid); 3128213197Smm 3129219089Spjd for (int c = 0; c < nvd->vdev_children; c++) 3130219089Spjd vdev_load_log_state(nvd->vdev_child[c], ovd->vdev_child[c]); 3131213197Smm 3132219089Spjd if (nvd->vdev_ops->vdev_op_leaf) { 3133213197Smm /* 3134219089Spjd * Restore the persistent vdev state 3135213197Smm */ 3136219089Spjd nvd->vdev_offline = ovd->vdev_offline; 3137219089Spjd nvd->vdev_faulted = ovd->vdev_faulted; 3138219089Spjd nvd->vdev_degraded = ovd->vdev_degraded; 3139219089Spjd nvd->vdev_removed = ovd->vdev_removed; 3140213197Smm } 3141213197Smm} 3142219089Spjd 3143219089Spjd/* 3144219089Spjd * Determine if a log device has valid content. If the vdev was 3145219089Spjd * removed or faulted in the MOS config then we know that 3146219089Spjd * the content on the log device has already been written to the pool. 3147219089Spjd */ 3148219089Spjdboolean_t 3149219089Spjdvdev_log_state_valid(vdev_t *vd) 3150219089Spjd{ 3151219089Spjd if (vd->vdev_ops->vdev_op_leaf && !vd->vdev_faulted && 3152219089Spjd !vd->vdev_removed) 3153219089Spjd return (B_TRUE); 3154219089Spjd 3155219089Spjd for (int c = 0; c < vd->vdev_children; c++) 3156219089Spjd if (vdev_log_state_valid(vd->vdev_child[c])) 3157219089Spjd return (B_TRUE); 3158219089Spjd 3159219089Spjd return (B_FALSE); 3160219089Spjd} 3161219089Spjd 3162219089Spjd/* 3163219089Spjd * Expand a vdev if possible. 3164219089Spjd */ 3165219089Spjdvoid 3166219089Spjdvdev_expand(vdev_t *vd, uint64_t txg) 3167219089Spjd{ 3168219089Spjd ASSERT(vd->vdev_top == vd); 3169219089Spjd ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3170219089Spjd 3171219089Spjd if ((vd->vdev_asize >> vd->vdev_ms_shift) > vd->vdev_ms_count) { 3172219089Spjd VERIFY(vdev_metaslab_init(vd, txg) == 0); 3173219089Spjd vdev_config_dirty(vd); 3174219089Spjd } 3175219089Spjd} 3176219089Spjd 3177219089Spjd/* 3178219089Spjd * Split a vdev. 3179219089Spjd */ 3180219089Spjdvoid 3181219089Spjdvdev_split(vdev_t *vd) 3182219089Spjd{ 3183219089Spjd vdev_t *cvd, *pvd = vd->vdev_parent; 3184219089Spjd 3185219089Spjd vdev_remove_child(pvd, vd); 3186219089Spjd vdev_compact_children(pvd); 3187219089Spjd 3188219089Spjd cvd = pvd->vdev_child[0]; 3189219089Spjd if (pvd->vdev_children == 1) { 3190219089Spjd vdev_remove_parent(cvd); 3191219089Spjd cvd->vdev_splitting = B_TRUE; 3192219089Spjd } 3193219089Spjd vdev_propagate_state(cvd); 3194219089Spjd} 3195247265Smm 3196247265Smmvoid 3197247265Smmvdev_deadman(vdev_t *vd) 3198247265Smm{ 3199247265Smm for (int c = 0; c < vd->vdev_children; c++) { 3200247265Smm vdev_t *cvd = vd->vdev_child[c]; 3201247265Smm 3202247265Smm vdev_deadman(cvd); 3203247265Smm } 3204247265Smm 3205247265Smm if (vd->vdev_ops->vdev_op_leaf) { 3206247265Smm vdev_queue_t *vq = &vd->vdev_queue; 3207247265Smm 3208247265Smm mutex_enter(&vq->vq_lock); 3209247265Smm if (avl_numnodes(&vq->vq_pending_tree) > 0) { 3210247265Smm spa_t *spa = vd->vdev_spa; 3211247265Smm zio_t *fio; 3212247265Smm uint64_t delta; 3213247265Smm 3214247265Smm /* 3215247265Smm * Look at the head of all the pending queues, 3216247265Smm * if any I/O has been outstanding for longer than 3217247265Smm * the spa_deadman_synctime we panic the system. 3218247265Smm */ 3219247265Smm fio = avl_first(&vq->vq_pending_tree); 3220249206Smm delta = gethrtime() - fio->io_timestamp; 3221249206Smm if (delta > spa_deadman_synctime(spa)) { 3222249206Smm zfs_dbgmsg("SLOW IO: zio timestamp %lluns, " 3223249206Smm "delta %lluns, last io %lluns", 3224247265Smm fio->io_timestamp, delta, 3225247265Smm vq->vq_io_complete_ts); 3226247265Smm fm_panic("I/O to pool '%s' appears to be " 3227247348Smm "hung on vdev guid %llu at '%s'.", 3228247348Smm spa_name(spa), 3229247348Smm (long long unsigned int) vd->vdev_guid, 3230247348Smm vd->vdev_path); 3231247265Smm } 3232247265Smm } 3233247265Smm mutex_exit(&vq->vq_lock); 3234247265Smm } 3235247265Smm} 3236