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. 24229578Smm * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25265751Sdelphij * Copyright (c) 2011, 2014 by Delphix. All rights reserved. 26248369Smm * 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> 40262094Savg#include <sys/space_reftree.h> 41168404Spjd#include <sys/zio.h> 42168404Spjd#include <sys/zap.h> 43168404Spjd#include <sys/fs/zfs.h> 44185029Spjd#include <sys/arc.h> 45213197Smm#include <sys/zil.h> 46219089Spjd#include <sys/dsl_scan.h> 47251419Ssmh#include <sys/trim_map.h> 48168404Spjd 49168404SpjdSYSCTL_DECL(_vfs_zfs); 50168404SpjdSYSCTL_NODE(_vfs_zfs, OID_AUTO, vdev, CTLFLAG_RW, 0, "ZFS VDEV"); 51168404Spjd 52168404Spjd/* 53168404Spjd * Virtual device management. 54168404Spjd */ 55168404Spjd 56266123Ssmh/* 57262081Savg * The limit for ZFS to automatically increase a top-level vdev's ashift 58262081Savg * from logical ashift to physical ashift. 59262081Savg * 60262081Savg * Example: one or more 512B emulation child vdevs 61262081Savg * child->vdev_ashift = 9 (512 bytes) 62262081Savg * child->vdev_physical_ashift = 12 (4096 bytes) 63262081Savg * zfs_max_auto_ashift = 11 (2048 bytes) 64266123Ssmh * zfs_min_auto_ashift = 9 (512 bytes) 65262081Savg * 66266123Ssmh * On pool creation or the addition of a new top-level vdev, ZFS will 67266123Ssmh * increase the ashift of the top-level vdev to 2048 as limited by 68266123Ssmh * zfs_max_auto_ashift. 69262081Savg * 70262081Savg * Example: one or more 512B emulation child vdevs 71262081Savg * child->vdev_ashift = 9 (512 bytes) 72262081Savg * child->vdev_physical_ashift = 12 (4096 bytes) 73262081Savg * zfs_max_auto_ashift = 13 (8192 bytes) 74266123Ssmh * zfs_min_auto_ashift = 9 (512 bytes) 75262081Savg * 76266123Ssmh * On pool creation or the addition of a new top-level vdev, ZFS will 77266123Ssmh * increase the ashift of the top-level vdev to 4096 to match the 78266123Ssmh * max vdev_physical_ashift. 79266123Ssmh * 80266123Ssmh * Example: one or more 512B emulation child vdevs 81266123Ssmh * child->vdev_ashift = 9 (512 bytes) 82266123Ssmh * child->vdev_physical_ashift = 9 (512 bytes) 83266123Ssmh * zfs_max_auto_ashift = 13 (8192 bytes) 84266123Ssmh * zfs_min_auto_ashift = 12 (4096 bytes) 85266123Ssmh * 86266123Ssmh * On pool creation or the addition of a new top-level vdev, ZFS will 87266123Ssmh * increase the ashift of the top-level vdev to 4096 to match the 88266123Ssmh * zfs_min_auto_ashift. 89262081Savg */ 90262081Savgstatic uint64_t zfs_max_auto_ashift = SPA_MAXASHIFT; 91266123Ssmhstatic uint64_t zfs_min_auto_ashift = SPA_MINASHIFT; 92262081Savg 93262081Savgstatic int 94262081Savgsysctl_vfs_zfs_max_auto_ashift(SYSCTL_HANDLER_ARGS) 95262081Savg{ 96262081Savg uint64_t val; 97262081Savg int err; 98262081Savg 99262081Savg val = zfs_max_auto_ashift; 100262081Savg err = sysctl_handle_64(oidp, &val, 0, req); 101262081Savg if (err != 0 || req->newptr == NULL) 102262081Savg return (err); 103262081Savg 104266123Ssmh if (val > SPA_MAXASHIFT || val < zfs_min_auto_ashift) 105266123Ssmh return (EINVAL); 106262081Savg 107262081Savg zfs_max_auto_ashift = val; 108262081Savg 109262081Savg return (0); 110262081Savg} 111262081SavgSYSCTL_PROC(_vfs_zfs, OID_AUTO, max_auto_ashift, 112262081Savg CTLTYPE_U64 | CTLFLAG_MPSAFE | CTLFLAG_RW, 0, sizeof(uint64_t), 113262081Savg sysctl_vfs_zfs_max_auto_ashift, "QU", 114266123Ssmh "Max ashift used when optimising for logical -> physical sectors size on " 115266123Ssmh "new top-level vdevs."); 116262081Savg 117266123Ssmhstatic int 118266123Ssmhsysctl_vfs_zfs_min_auto_ashift(SYSCTL_HANDLER_ARGS) 119266123Ssmh{ 120266123Ssmh uint64_t val; 121266123Ssmh int err; 122266123Ssmh 123266123Ssmh val = zfs_min_auto_ashift; 124266123Ssmh err = sysctl_handle_64(oidp, &val, 0, req); 125266123Ssmh if (err != 0 || req->newptr == NULL) 126266123Ssmh return (err); 127266123Ssmh 128266123Ssmh if (val < SPA_MINASHIFT || val > zfs_max_auto_ashift) 129266123Ssmh return (EINVAL); 130266123Ssmh 131266123Ssmh zfs_min_auto_ashift = val; 132266123Ssmh 133266123Ssmh return (0); 134266123Ssmh} 135266123SsmhSYSCTL_PROC(_vfs_zfs, OID_AUTO, min_auto_ashift, 136266123Ssmh CTLTYPE_U64 | CTLFLAG_MPSAFE | CTLFLAG_RW, 0, sizeof(uint64_t), 137266123Ssmh sysctl_vfs_zfs_min_auto_ashift, "QU", 138266123Ssmh "Min ashift used when creating new top-level vdevs."); 139266123Ssmh 140168404Spjdstatic vdev_ops_t *vdev_ops_table[] = { 141168404Spjd &vdev_root_ops, 142168404Spjd &vdev_raidz_ops, 143168404Spjd &vdev_mirror_ops, 144168404Spjd &vdev_replacing_ops, 145168404Spjd &vdev_spare_ops, 146168404Spjd#ifdef _KERNEL 147168404Spjd &vdev_geom_ops, 148168404Spjd#else 149168404Spjd &vdev_disk_ops, 150185029Spjd#endif 151168404Spjd &vdev_file_ops, 152168404Spjd &vdev_missing_ops, 153219089Spjd &vdev_hole_ops, 154168404Spjd NULL 155168404Spjd}; 156168404Spjd 157168404Spjd 158168404Spjd/* 159168404Spjd * Given a vdev type, return the appropriate ops vector. 160168404Spjd */ 161168404Spjdstatic vdev_ops_t * 162168404Spjdvdev_getops(const char *type) 163168404Spjd{ 164168404Spjd vdev_ops_t *ops, **opspp; 165168404Spjd 166168404Spjd for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) 167168404Spjd if (strcmp(ops->vdev_op_type, type) == 0) 168168404Spjd break; 169168404Spjd 170168404Spjd return (ops); 171168404Spjd} 172168404Spjd 173168404Spjd/* 174168404Spjd * Default asize function: return the MAX of psize with the asize of 175168404Spjd * all children. This is what's used by anything other than RAID-Z. 176168404Spjd */ 177168404Spjduint64_t 178168404Spjdvdev_default_asize(vdev_t *vd, uint64_t psize) 179168404Spjd{ 180168404Spjd uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); 181168404Spjd uint64_t csize; 182168404Spjd 183219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 184168404Spjd csize = vdev_psize_to_asize(vd->vdev_child[c], psize); 185168404Spjd asize = MAX(asize, csize); 186168404Spjd } 187168404Spjd 188168404Spjd return (asize); 189168404Spjd} 190168404Spjd 191168404Spjd/* 192219089Spjd * Get the minimum allocatable size. We define the allocatable size as 193219089Spjd * the vdev's asize rounded to the nearest metaslab. This allows us to 194219089Spjd * replace or attach devices which don't have the same physical size but 195219089Spjd * can still satisfy the same number of allocations. 196168404Spjd */ 197168404Spjduint64_t 198219089Spjdvdev_get_min_asize(vdev_t *vd) 199168404Spjd{ 200219089Spjd vdev_t *pvd = vd->vdev_parent; 201168404Spjd 202219089Spjd /* 203236839Smm * If our parent is NULL (inactive spare or cache) or is the root, 204219089Spjd * just return our own asize. 205219089Spjd */ 206219089Spjd if (pvd == NULL) 207219089Spjd return (vd->vdev_asize); 208168404Spjd 209168404Spjd /* 210219089Spjd * The top-level vdev just returns the allocatable size rounded 211219089Spjd * to the nearest metaslab. 212168404Spjd */ 213219089Spjd if (vd == vd->vdev_top) 214219089Spjd return (P2ALIGN(vd->vdev_asize, 1ULL << vd->vdev_ms_shift)); 215168404Spjd 216219089Spjd /* 217219089Spjd * The allocatable space for a raidz vdev is N * sizeof(smallest child), 218219089Spjd * so each child must provide at least 1/Nth of its asize. 219219089Spjd */ 220219089Spjd if (pvd->vdev_ops == &vdev_raidz_ops) 221219089Spjd return (pvd->vdev_min_asize / pvd->vdev_children); 222168404Spjd 223219089Spjd return (pvd->vdev_min_asize); 224219089Spjd} 225168404Spjd 226219089Spjdvoid 227219089Spjdvdev_set_min_asize(vdev_t *vd) 228219089Spjd{ 229219089Spjd vd->vdev_min_asize = vdev_get_min_asize(vd); 230219089Spjd 231219089Spjd for (int c = 0; c < vd->vdev_children; c++) 232219089Spjd vdev_set_min_asize(vd->vdev_child[c]); 233168404Spjd} 234168404Spjd 235168404Spjdvdev_t * 236168404Spjdvdev_lookup_top(spa_t *spa, uint64_t vdev) 237168404Spjd{ 238168404Spjd vdev_t *rvd = spa->spa_root_vdev; 239168404Spjd 240185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 241185029Spjd 242185029Spjd if (vdev < rvd->vdev_children) { 243185029Spjd ASSERT(rvd->vdev_child[vdev] != NULL); 244168404Spjd return (rvd->vdev_child[vdev]); 245185029Spjd } 246168404Spjd 247168404Spjd return (NULL); 248168404Spjd} 249168404Spjd 250168404Spjdvdev_t * 251168404Spjdvdev_lookup_by_guid(vdev_t *vd, uint64_t guid) 252168404Spjd{ 253168404Spjd vdev_t *mvd; 254168404Spjd 255168404Spjd if (vd->vdev_guid == guid) 256168404Spjd return (vd); 257168404Spjd 258219089Spjd for (int c = 0; c < vd->vdev_children; c++) 259168404Spjd if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != 260168404Spjd NULL) 261168404Spjd return (mvd); 262168404Spjd 263168404Spjd return (NULL); 264168404Spjd} 265168404Spjd 266168404Spjdvoid 267168404Spjdvdev_add_child(vdev_t *pvd, vdev_t *cvd) 268168404Spjd{ 269168404Spjd size_t oldsize, newsize; 270168404Spjd uint64_t id = cvd->vdev_id; 271168404Spjd vdev_t **newchild; 272168404Spjd 273185029Spjd ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 274168404Spjd ASSERT(cvd->vdev_parent == NULL); 275168404Spjd 276168404Spjd cvd->vdev_parent = pvd; 277168404Spjd 278168404Spjd if (pvd == NULL) 279168404Spjd return; 280168404Spjd 281168404Spjd ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); 282168404Spjd 283168404Spjd oldsize = pvd->vdev_children * sizeof (vdev_t *); 284168404Spjd pvd->vdev_children = MAX(pvd->vdev_children, id + 1); 285168404Spjd newsize = pvd->vdev_children * sizeof (vdev_t *); 286168404Spjd 287168404Spjd newchild = kmem_zalloc(newsize, KM_SLEEP); 288168404Spjd if (pvd->vdev_child != NULL) { 289168404Spjd bcopy(pvd->vdev_child, newchild, oldsize); 290168404Spjd kmem_free(pvd->vdev_child, oldsize); 291168404Spjd } 292168404Spjd 293168404Spjd pvd->vdev_child = newchild; 294168404Spjd pvd->vdev_child[id] = cvd; 295168404Spjd 296168404Spjd cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); 297168404Spjd ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); 298168404Spjd 299168404Spjd /* 300168404Spjd * Walk up all ancestors to update guid sum. 301168404Spjd */ 302168404Spjd for (; pvd != NULL; pvd = pvd->vdev_parent) 303168404Spjd pvd->vdev_guid_sum += cvd->vdev_guid_sum; 304168404Spjd} 305168404Spjd 306168404Spjdvoid 307168404Spjdvdev_remove_child(vdev_t *pvd, vdev_t *cvd) 308168404Spjd{ 309168404Spjd int c; 310168404Spjd uint_t id = cvd->vdev_id; 311168404Spjd 312168404Spjd ASSERT(cvd->vdev_parent == pvd); 313168404Spjd 314168404Spjd if (pvd == NULL) 315168404Spjd return; 316168404Spjd 317168404Spjd ASSERT(id < pvd->vdev_children); 318168404Spjd ASSERT(pvd->vdev_child[id] == cvd); 319168404Spjd 320168404Spjd pvd->vdev_child[id] = NULL; 321168404Spjd cvd->vdev_parent = NULL; 322168404Spjd 323168404Spjd for (c = 0; c < pvd->vdev_children; c++) 324168404Spjd if (pvd->vdev_child[c]) 325168404Spjd break; 326168404Spjd 327168404Spjd if (c == pvd->vdev_children) { 328168404Spjd kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); 329168404Spjd pvd->vdev_child = NULL; 330168404Spjd pvd->vdev_children = 0; 331168404Spjd } 332168404Spjd 333168404Spjd /* 334168404Spjd * Walk up all ancestors to update guid sum. 335168404Spjd */ 336168404Spjd for (; pvd != NULL; pvd = pvd->vdev_parent) 337168404Spjd pvd->vdev_guid_sum -= cvd->vdev_guid_sum; 338168404Spjd} 339168404Spjd 340168404Spjd/* 341168404Spjd * Remove any holes in the child array. 342168404Spjd */ 343168404Spjdvoid 344168404Spjdvdev_compact_children(vdev_t *pvd) 345168404Spjd{ 346168404Spjd vdev_t **newchild, *cvd; 347168404Spjd int oldc = pvd->vdev_children; 348219089Spjd int newc; 349168404Spjd 350185029Spjd ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 351168404Spjd 352219089Spjd for (int c = newc = 0; c < oldc; c++) 353168404Spjd if (pvd->vdev_child[c]) 354168404Spjd newc++; 355168404Spjd 356168404Spjd newchild = kmem_alloc(newc * sizeof (vdev_t *), KM_SLEEP); 357168404Spjd 358219089Spjd for (int c = newc = 0; c < oldc; c++) { 359168404Spjd if ((cvd = pvd->vdev_child[c]) != NULL) { 360168404Spjd newchild[newc] = cvd; 361168404Spjd cvd->vdev_id = newc++; 362168404Spjd } 363168404Spjd } 364168404Spjd 365168404Spjd kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); 366168404Spjd pvd->vdev_child = newchild; 367168404Spjd pvd->vdev_children = newc; 368168404Spjd} 369168404Spjd 370168404Spjd/* 371168404Spjd * Allocate and minimally initialize a vdev_t. 372168404Spjd */ 373219089Spjdvdev_t * 374168404Spjdvdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) 375168404Spjd{ 376168404Spjd vdev_t *vd; 377168404Spjd 378168404Spjd vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP); 379168404Spjd 380168404Spjd if (spa->spa_root_vdev == NULL) { 381168404Spjd ASSERT(ops == &vdev_root_ops); 382168404Spjd spa->spa_root_vdev = vd; 383229578Smm spa->spa_load_guid = spa_generate_guid(NULL); 384168404Spjd } 385168404Spjd 386219089Spjd if (guid == 0 && ops != &vdev_hole_ops) { 387168404Spjd if (spa->spa_root_vdev == vd) { 388168404Spjd /* 389168404Spjd * The root vdev's guid will also be the pool guid, 390168404Spjd * which must be unique among all pools. 391168404Spjd */ 392219089Spjd guid = spa_generate_guid(NULL); 393168404Spjd } else { 394168404Spjd /* 395168404Spjd * Any other vdev's guid must be unique within the pool. 396168404Spjd */ 397219089Spjd guid = spa_generate_guid(spa); 398168404Spjd } 399168404Spjd ASSERT(!spa_guid_exists(spa_guid(spa), guid)); 400168404Spjd } 401168404Spjd 402168404Spjd vd->vdev_spa = spa; 403168404Spjd vd->vdev_id = id; 404168404Spjd vd->vdev_guid = guid; 405168404Spjd vd->vdev_guid_sum = guid; 406168404Spjd vd->vdev_ops = ops; 407168404Spjd vd->vdev_state = VDEV_STATE_CLOSED; 408219089Spjd vd->vdev_ishole = (ops == &vdev_hole_ops); 409168404Spjd 410168404Spjd mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_DEFAULT, NULL); 411168404Spjd mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); 412185029Spjd mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL); 413209962Smm for (int t = 0; t < DTL_TYPES; t++) { 414262094Savg vd->vdev_dtl[t] = range_tree_create(NULL, NULL, 415209962Smm &vd->vdev_dtl_lock); 416209962Smm } 417168404Spjd txg_list_create(&vd->vdev_ms_list, 418168404Spjd offsetof(struct metaslab, ms_txg_node)); 419168404Spjd txg_list_create(&vd->vdev_dtl_list, 420168404Spjd offsetof(struct vdev, vdev_dtl_node)); 421168404Spjd vd->vdev_stat.vs_timestamp = gethrtime(); 422185029Spjd vdev_queue_init(vd); 423185029Spjd vdev_cache_init(vd); 424168404Spjd 425168404Spjd return (vd); 426168404Spjd} 427168404Spjd 428168404Spjd/* 429168404Spjd * Allocate a new vdev. The 'alloctype' is used to control whether we are 430168404Spjd * creating a new vdev or loading an existing one - the behavior is slightly 431168404Spjd * different for each case. 432168404Spjd */ 433168404Spjdint 434168404Spjdvdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, 435168404Spjd int alloctype) 436168404Spjd{ 437168404Spjd vdev_ops_t *ops; 438168404Spjd char *type; 439185029Spjd uint64_t guid = 0, islog, nparity; 440168404Spjd vdev_t *vd; 441168404Spjd 442185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 443168404Spjd 444168404Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) 445249643Smm return (SET_ERROR(EINVAL)); 446168404Spjd 447168404Spjd if ((ops = vdev_getops(type)) == NULL) 448249643Smm return (SET_ERROR(EINVAL)); 449168404Spjd 450168404Spjd /* 451168404Spjd * If this is a load, get the vdev guid from the nvlist. 452168404Spjd * Otherwise, vdev_alloc_common() will generate one for us. 453168404Spjd */ 454168404Spjd if (alloctype == VDEV_ALLOC_LOAD) { 455168404Spjd uint64_t label_id; 456168404Spjd 457168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || 458168404Spjd label_id != id) 459249643Smm return (SET_ERROR(EINVAL)); 460168404Spjd 461168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 462249643Smm return (SET_ERROR(EINVAL)); 463168404Spjd } else if (alloctype == VDEV_ALLOC_SPARE) { 464168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 465249643Smm return (SET_ERROR(EINVAL)); 466185029Spjd } else if (alloctype == VDEV_ALLOC_L2CACHE) { 467185029Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 468249643Smm return (SET_ERROR(EINVAL)); 469219089Spjd } else if (alloctype == VDEV_ALLOC_ROOTPOOL) { 470219089Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 471249643Smm return (SET_ERROR(EINVAL)); 472168404Spjd } 473168404Spjd 474168404Spjd /* 475168404Spjd * The first allocated vdev must be of type 'root'. 476168404Spjd */ 477168404Spjd if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) 478249643Smm return (SET_ERROR(EINVAL)); 479168404Spjd 480185029Spjd /* 481185029Spjd * Determine whether we're a log vdev. 482185029Spjd */ 483185029Spjd islog = 0; 484185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); 485185029Spjd if (islog && spa_version(spa) < SPA_VERSION_SLOGS) 486249643Smm return (SET_ERROR(ENOTSUP)); 487168404Spjd 488219089Spjd if (ops == &vdev_hole_ops && spa_version(spa) < SPA_VERSION_HOLES) 489249643Smm return (SET_ERROR(ENOTSUP)); 490219089Spjd 491168404Spjd /* 492185029Spjd * Set the nparity property for RAID-Z vdevs. 493168404Spjd */ 494185029Spjd nparity = -1ULL; 495168404Spjd if (ops == &vdev_raidz_ops) { 496168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, 497185029Spjd &nparity) == 0) { 498219089Spjd if (nparity == 0 || nparity > VDEV_RAIDZ_MAXPARITY) 499249643Smm return (SET_ERROR(EINVAL)); 500168404Spjd /* 501219089Spjd * Previous versions could only support 1 or 2 parity 502219089Spjd * device. 503168404Spjd */ 504219089Spjd if (nparity > 1 && 505219089Spjd spa_version(spa) < SPA_VERSION_RAIDZ2) 506249643Smm return (SET_ERROR(ENOTSUP)); 507219089Spjd if (nparity > 2 && 508219089Spjd spa_version(spa) < SPA_VERSION_RAIDZ3) 509249643Smm return (SET_ERROR(ENOTSUP)); 510168404Spjd } else { 511168404Spjd /* 512168404Spjd * We require the parity to be specified for SPAs that 513168404Spjd * support multiple parity levels. 514168404Spjd */ 515219089Spjd if (spa_version(spa) >= SPA_VERSION_RAIDZ2) 516249643Smm return (SET_ERROR(EINVAL)); 517168404Spjd /* 518168404Spjd * Otherwise, we default to 1 parity device for RAID-Z. 519168404Spjd */ 520185029Spjd nparity = 1; 521168404Spjd } 522168404Spjd } else { 523185029Spjd nparity = 0; 524168404Spjd } 525185029Spjd ASSERT(nparity != -1ULL); 526168404Spjd 527185029Spjd vd = vdev_alloc_common(spa, id, guid, ops); 528185029Spjd 529185029Spjd vd->vdev_islog = islog; 530185029Spjd vd->vdev_nparity = nparity; 531185029Spjd 532185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) 533185029Spjd vd->vdev_path = spa_strdup(vd->vdev_path); 534185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) 535185029Spjd vd->vdev_devid = spa_strdup(vd->vdev_devid); 536185029Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, 537185029Spjd &vd->vdev_physpath) == 0) 538185029Spjd vd->vdev_physpath = spa_strdup(vd->vdev_physpath); 539209962Smm if (nvlist_lookup_string(nv, ZPOOL_CONFIG_FRU, &vd->vdev_fru) == 0) 540209962Smm vd->vdev_fru = spa_strdup(vd->vdev_fru); 541185029Spjd 542168404Spjd /* 543168404Spjd * Set the whole_disk property. If it's not specified, leave the value 544168404Spjd * as -1. 545168404Spjd */ 546168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, 547168404Spjd &vd->vdev_wholedisk) != 0) 548168404Spjd vd->vdev_wholedisk = -1ULL; 549168404Spjd 550168404Spjd /* 551168404Spjd * Look for the 'not present' flag. This will only be set if the device 552168404Spjd * was not present at the time of import. 553168404Spjd */ 554209962Smm (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, 555209962Smm &vd->vdev_not_present); 556168404Spjd 557168404Spjd /* 558168404Spjd * Get the alignment requirement. 559168404Spjd */ 560168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); 561168404Spjd 562168404Spjd /* 563219089Spjd * Retrieve the vdev creation time. 564219089Spjd */ 565219089Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_CREATE_TXG, 566219089Spjd &vd->vdev_crtxg); 567219089Spjd 568219089Spjd /* 569168404Spjd * If we're a top-level vdev, try to load the allocation parameters. 570168404Spjd */ 571219089Spjd if (parent && !parent->vdev_parent && 572219089Spjd (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) { 573168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, 574168404Spjd &vd->vdev_ms_array); 575168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, 576168404Spjd &vd->vdev_ms_shift); 577168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, 578168404Spjd &vd->vdev_asize); 579219089Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVING, 580219089Spjd &vd->vdev_removing); 581168404Spjd } 582168404Spjd 583231141Smm if (parent && !parent->vdev_parent && alloctype != VDEV_ALLOC_ATTACH) { 584219089Spjd ASSERT(alloctype == VDEV_ALLOC_LOAD || 585219089Spjd alloctype == VDEV_ALLOC_ADD || 586219089Spjd alloctype == VDEV_ALLOC_SPLIT || 587219089Spjd alloctype == VDEV_ALLOC_ROOTPOOL); 588219089Spjd vd->vdev_mg = metaslab_group_create(islog ? 589219089Spjd spa_log_class(spa) : spa_normal_class(spa), vd); 590219089Spjd } 591219089Spjd 592168404Spjd /* 593185029Spjd * If we're a leaf vdev, try to load the DTL object and other state. 594168404Spjd */ 595185029Spjd if (vd->vdev_ops->vdev_op_leaf && 596219089Spjd (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE || 597219089Spjd alloctype == VDEV_ALLOC_ROOTPOOL)) { 598185029Spjd if (alloctype == VDEV_ALLOC_LOAD) { 599185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, 600262094Savg &vd->vdev_dtl_object); 601185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, 602185029Spjd &vd->vdev_unspare); 603185029Spjd } 604219089Spjd 605219089Spjd if (alloctype == VDEV_ALLOC_ROOTPOOL) { 606219089Spjd uint64_t spare = 0; 607219089Spjd 608219089Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE, 609219089Spjd &spare) == 0 && spare) 610219089Spjd spa_spare_add(vd); 611219089Spjd } 612219089Spjd 613168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, 614168404Spjd &vd->vdev_offline); 615185029Spjd 616262086Savg (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_RESILVER_TXG, 617262086Savg &vd->vdev_resilver_txg); 618219089Spjd 619185029Spjd /* 620185029Spjd * When importing a pool, we want to ignore the persistent fault 621185029Spjd * state, as the diagnosis made on another system may not be 622219089Spjd * valid in the current context. Local vdevs will 623219089Spjd * remain in the faulted state. 624185029Spjd */ 625219089Spjd if (spa_load_state(spa) == SPA_LOAD_OPEN) { 626185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, 627185029Spjd &vd->vdev_faulted); 628185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, 629185029Spjd &vd->vdev_degraded); 630185029Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, 631185029Spjd &vd->vdev_removed); 632219089Spjd 633219089Spjd if (vd->vdev_faulted || vd->vdev_degraded) { 634219089Spjd char *aux; 635219089Spjd 636219089Spjd vd->vdev_label_aux = 637219089Spjd VDEV_AUX_ERR_EXCEEDED; 638219089Spjd if (nvlist_lookup_string(nv, 639219089Spjd ZPOOL_CONFIG_AUX_STATE, &aux) == 0 && 640219089Spjd strcmp(aux, "external") == 0) 641219089Spjd vd->vdev_label_aux = VDEV_AUX_EXTERNAL; 642219089Spjd } 643185029Spjd } 644168404Spjd } 645168404Spjd 646168404Spjd /* 647168404Spjd * Add ourselves to the parent's list of children. 648168404Spjd */ 649168404Spjd vdev_add_child(parent, vd); 650168404Spjd 651168404Spjd *vdp = vd; 652168404Spjd 653168404Spjd return (0); 654168404Spjd} 655168404Spjd 656168404Spjdvoid 657168404Spjdvdev_free(vdev_t *vd) 658168404Spjd{ 659185029Spjd spa_t *spa = vd->vdev_spa; 660168404Spjd 661168404Spjd /* 662168404Spjd * vdev_free() implies closing the vdev first. This is simpler than 663168404Spjd * trying to ensure complicated semantics for all callers. 664168404Spjd */ 665168404Spjd vdev_close(vd); 666168404Spjd 667185029Spjd ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); 668219089Spjd ASSERT(!list_link_active(&vd->vdev_state_dirty_node)); 669168404Spjd 670168404Spjd /* 671168404Spjd * Free all children. 672168404Spjd */ 673219089Spjd for (int c = 0; c < vd->vdev_children; c++) 674168404Spjd vdev_free(vd->vdev_child[c]); 675168404Spjd 676168404Spjd ASSERT(vd->vdev_child == NULL); 677168404Spjd ASSERT(vd->vdev_guid_sum == vd->vdev_guid); 678168404Spjd 679168404Spjd /* 680168404Spjd * Discard allocation state. 681168404Spjd */ 682219089Spjd if (vd->vdev_mg != NULL) { 683168404Spjd vdev_metaslab_fini(vd); 684219089Spjd metaslab_group_destroy(vd->vdev_mg); 685219089Spjd } 686168404Spjd 687243674Smm ASSERT0(vd->vdev_stat.vs_space); 688243674Smm ASSERT0(vd->vdev_stat.vs_dspace); 689243674Smm ASSERT0(vd->vdev_stat.vs_alloc); 690168404Spjd 691168404Spjd /* 692168404Spjd * Remove this vdev from its parent's child list. 693168404Spjd */ 694168404Spjd vdev_remove_child(vd->vdev_parent, vd); 695168404Spjd 696168404Spjd ASSERT(vd->vdev_parent == NULL); 697168404Spjd 698185029Spjd /* 699185029Spjd * Clean up vdev structure. 700185029Spjd */ 701185029Spjd vdev_queue_fini(vd); 702185029Spjd vdev_cache_fini(vd); 703185029Spjd 704185029Spjd if (vd->vdev_path) 705185029Spjd spa_strfree(vd->vdev_path); 706185029Spjd if (vd->vdev_devid) 707185029Spjd spa_strfree(vd->vdev_devid); 708185029Spjd if (vd->vdev_physpath) 709185029Spjd spa_strfree(vd->vdev_physpath); 710209962Smm if (vd->vdev_fru) 711209962Smm spa_strfree(vd->vdev_fru); 712185029Spjd 713185029Spjd if (vd->vdev_isspare) 714185029Spjd spa_spare_remove(vd); 715185029Spjd if (vd->vdev_isl2cache) 716185029Spjd spa_l2cache_remove(vd); 717185029Spjd 718185029Spjd txg_list_destroy(&vd->vdev_ms_list); 719185029Spjd txg_list_destroy(&vd->vdev_dtl_list); 720209962Smm 721185029Spjd mutex_enter(&vd->vdev_dtl_lock); 722262094Savg space_map_close(vd->vdev_dtl_sm); 723209962Smm for (int t = 0; t < DTL_TYPES; t++) { 724262094Savg range_tree_vacate(vd->vdev_dtl[t], NULL, NULL); 725262094Savg range_tree_destroy(vd->vdev_dtl[t]); 726209962Smm } 727185029Spjd mutex_exit(&vd->vdev_dtl_lock); 728209962Smm 729185029Spjd mutex_destroy(&vd->vdev_dtl_lock); 730185029Spjd mutex_destroy(&vd->vdev_stat_lock); 731185029Spjd mutex_destroy(&vd->vdev_probe_lock); 732185029Spjd 733185029Spjd if (vd == spa->spa_root_vdev) 734185029Spjd spa->spa_root_vdev = NULL; 735185029Spjd 736185029Spjd kmem_free(vd, sizeof (vdev_t)); 737168404Spjd} 738168404Spjd 739168404Spjd/* 740168404Spjd * Transfer top-level vdev state from svd to tvd. 741168404Spjd */ 742168404Spjdstatic void 743168404Spjdvdev_top_transfer(vdev_t *svd, vdev_t *tvd) 744168404Spjd{ 745168404Spjd spa_t *spa = svd->vdev_spa; 746168404Spjd metaslab_t *msp; 747168404Spjd vdev_t *vd; 748168404Spjd int t; 749168404Spjd 750168404Spjd ASSERT(tvd == tvd->vdev_top); 751168404Spjd 752168404Spjd tvd->vdev_ms_array = svd->vdev_ms_array; 753168404Spjd tvd->vdev_ms_shift = svd->vdev_ms_shift; 754168404Spjd tvd->vdev_ms_count = svd->vdev_ms_count; 755168404Spjd 756168404Spjd svd->vdev_ms_array = 0; 757168404Spjd svd->vdev_ms_shift = 0; 758168404Spjd svd->vdev_ms_count = 0; 759168404Spjd 760231141Smm if (tvd->vdev_mg) 761231141Smm ASSERT3P(tvd->vdev_mg, ==, svd->vdev_mg); 762168404Spjd tvd->vdev_mg = svd->vdev_mg; 763168404Spjd tvd->vdev_ms = svd->vdev_ms; 764168404Spjd 765168404Spjd svd->vdev_mg = NULL; 766168404Spjd svd->vdev_ms = NULL; 767168404Spjd 768168404Spjd if (tvd->vdev_mg != NULL) 769168404Spjd tvd->vdev_mg->mg_vd = tvd; 770168404Spjd 771168404Spjd tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; 772168404Spjd tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; 773168404Spjd tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; 774168404Spjd 775168404Spjd svd->vdev_stat.vs_alloc = 0; 776168404Spjd svd->vdev_stat.vs_space = 0; 777168404Spjd svd->vdev_stat.vs_dspace = 0; 778168404Spjd 779168404Spjd for (t = 0; t < TXG_SIZE; t++) { 780168404Spjd while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) 781168404Spjd (void) txg_list_add(&tvd->vdev_ms_list, msp, t); 782168404Spjd while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) 783168404Spjd (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); 784168404Spjd if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) 785168404Spjd (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); 786168404Spjd } 787168404Spjd 788185029Spjd if (list_link_active(&svd->vdev_config_dirty_node)) { 789168404Spjd vdev_config_clean(svd); 790168404Spjd vdev_config_dirty(tvd); 791168404Spjd } 792168404Spjd 793185029Spjd if (list_link_active(&svd->vdev_state_dirty_node)) { 794185029Spjd vdev_state_clean(svd); 795185029Spjd vdev_state_dirty(tvd); 796185029Spjd } 797168404Spjd 798168404Spjd tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; 799168404Spjd svd->vdev_deflate_ratio = 0; 800185029Spjd 801185029Spjd tvd->vdev_islog = svd->vdev_islog; 802185029Spjd svd->vdev_islog = 0; 803168404Spjd} 804168404Spjd 805168404Spjdstatic void 806168404Spjdvdev_top_update(vdev_t *tvd, vdev_t *vd) 807168404Spjd{ 808168404Spjd if (vd == NULL) 809168404Spjd return; 810168404Spjd 811168404Spjd vd->vdev_top = tvd; 812168404Spjd 813219089Spjd for (int c = 0; c < vd->vdev_children; c++) 814168404Spjd vdev_top_update(tvd, vd->vdev_child[c]); 815168404Spjd} 816168404Spjd 817168404Spjd/* 818168404Spjd * Add a mirror/replacing vdev above an existing vdev. 819168404Spjd */ 820168404Spjdvdev_t * 821168404Spjdvdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) 822168404Spjd{ 823168404Spjd spa_t *spa = cvd->vdev_spa; 824168404Spjd vdev_t *pvd = cvd->vdev_parent; 825168404Spjd vdev_t *mvd; 826168404Spjd 827185029Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 828168404Spjd 829168404Spjd mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); 830168404Spjd 831168404Spjd mvd->vdev_asize = cvd->vdev_asize; 832219089Spjd mvd->vdev_min_asize = cvd->vdev_min_asize; 833236839Smm mvd->vdev_max_asize = cvd->vdev_max_asize; 834168404Spjd mvd->vdev_ashift = cvd->vdev_ashift; 835262081Savg mvd->vdev_logical_ashift = cvd->vdev_logical_ashift; 836262081Savg mvd->vdev_physical_ashift = cvd->vdev_physical_ashift; 837168404Spjd mvd->vdev_state = cvd->vdev_state; 838219089Spjd mvd->vdev_crtxg = cvd->vdev_crtxg; 839168404Spjd 840168404Spjd vdev_remove_child(pvd, cvd); 841168404Spjd vdev_add_child(pvd, mvd); 842168404Spjd cvd->vdev_id = mvd->vdev_children; 843168404Spjd vdev_add_child(mvd, cvd); 844168404Spjd vdev_top_update(cvd->vdev_top, cvd->vdev_top); 845168404Spjd 846168404Spjd if (mvd == mvd->vdev_top) 847168404Spjd vdev_top_transfer(cvd, mvd); 848168404Spjd 849168404Spjd return (mvd); 850168404Spjd} 851168404Spjd 852168404Spjd/* 853168404Spjd * Remove a 1-way mirror/replacing vdev from the tree. 854168404Spjd */ 855168404Spjdvoid 856168404Spjdvdev_remove_parent(vdev_t *cvd) 857168404Spjd{ 858168404Spjd vdev_t *mvd = cvd->vdev_parent; 859168404Spjd vdev_t *pvd = mvd->vdev_parent; 860168404Spjd 861185029Spjd ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 862168404Spjd 863168404Spjd ASSERT(mvd->vdev_children == 1); 864168404Spjd ASSERT(mvd->vdev_ops == &vdev_mirror_ops || 865168404Spjd mvd->vdev_ops == &vdev_replacing_ops || 866168404Spjd mvd->vdev_ops == &vdev_spare_ops); 867168404Spjd cvd->vdev_ashift = mvd->vdev_ashift; 868262081Savg cvd->vdev_logical_ashift = mvd->vdev_logical_ashift; 869262081Savg cvd->vdev_physical_ashift = mvd->vdev_physical_ashift; 870168404Spjd 871168404Spjd vdev_remove_child(mvd, cvd); 872168404Spjd vdev_remove_child(pvd, mvd); 873209962Smm 874185029Spjd /* 875185029Spjd * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. 876185029Spjd * Otherwise, we could have detached an offline device, and when we 877185029Spjd * go to import the pool we'll think we have two top-level vdevs, 878185029Spjd * instead of a different version of the same top-level vdev. 879185029Spjd */ 880209962Smm if (mvd->vdev_top == mvd) { 881209962Smm uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid; 882219089Spjd cvd->vdev_orig_guid = cvd->vdev_guid; 883209962Smm cvd->vdev_guid += guid_delta; 884209962Smm cvd->vdev_guid_sum += guid_delta; 885209962Smm } 886168404Spjd cvd->vdev_id = mvd->vdev_id; 887168404Spjd vdev_add_child(pvd, cvd); 888168404Spjd vdev_top_update(cvd->vdev_top, cvd->vdev_top); 889168404Spjd 890168404Spjd if (cvd == cvd->vdev_top) 891168404Spjd vdev_top_transfer(mvd, cvd); 892168404Spjd 893168404Spjd ASSERT(mvd->vdev_children == 0); 894168404Spjd vdev_free(mvd); 895168404Spjd} 896168404Spjd 897168404Spjdint 898168404Spjdvdev_metaslab_init(vdev_t *vd, uint64_t txg) 899168404Spjd{ 900168404Spjd spa_t *spa = vd->vdev_spa; 901168404Spjd objset_t *mos = spa->spa_meta_objset; 902168404Spjd uint64_t m; 903168404Spjd uint64_t oldc = vd->vdev_ms_count; 904168404Spjd uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; 905168404Spjd metaslab_t **mspp; 906168404Spjd int error; 907168404Spjd 908219089Spjd ASSERT(txg == 0 || spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 909219089Spjd 910219089Spjd /* 911219089Spjd * This vdev is not being allocated from yet or is a hole. 912219089Spjd */ 913219089Spjd if (vd->vdev_ms_shift == 0) 914168404Spjd return (0); 915168404Spjd 916219089Spjd ASSERT(!vd->vdev_ishole); 917219089Spjd 918213197Smm /* 919213197Smm * Compute the raidz-deflation ratio. Note, we hard-code 920213197Smm * in 128k (1 << 17) because it is the current "typical" blocksize. 921213197Smm * Even if SPA_MAXBLOCKSIZE changes, this algorithm must never change, 922213197Smm * or we will inconsistently account for existing bp's. 923213197Smm */ 924213197Smm vd->vdev_deflate_ratio = (1 << 17) / 925213197Smm (vdev_psize_to_asize(vd, 1 << 17) >> SPA_MINBLOCKSHIFT); 926213197Smm 927168404Spjd ASSERT(oldc <= newc); 928168404Spjd 929168404Spjd mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); 930168404Spjd 931168404Spjd if (oldc != 0) { 932168404Spjd bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); 933168404Spjd kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); 934168404Spjd } 935168404Spjd 936168404Spjd vd->vdev_ms = mspp; 937168404Spjd vd->vdev_ms_count = newc; 938168404Spjd 939168404Spjd for (m = oldc; m < newc; m++) { 940262094Savg uint64_t object = 0; 941262094Savg 942168404Spjd if (txg == 0) { 943168404Spjd error = dmu_read(mos, vd->vdev_ms_array, 944209962Smm m * sizeof (uint64_t), sizeof (uint64_t), &object, 945209962Smm DMU_READ_PREFETCH); 946168404Spjd if (error) 947168404Spjd return (error); 948168404Spjd } 949262094Savg vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, m, object, txg); 950168404Spjd } 951168404Spjd 952219089Spjd if (txg == 0) 953219089Spjd spa_config_enter(spa, SCL_ALLOC, FTAG, RW_WRITER); 954219089Spjd 955219089Spjd /* 956219089Spjd * If the vdev is being removed we don't activate 957219089Spjd * the metaslabs since we want to ensure that no new 958219089Spjd * allocations are performed on this device. 959219089Spjd */ 960219089Spjd if (oldc == 0 && !vd->vdev_removing) 961219089Spjd metaslab_group_activate(vd->vdev_mg); 962219089Spjd 963219089Spjd if (txg == 0) 964219089Spjd spa_config_exit(spa, SCL_ALLOC, FTAG); 965219089Spjd 966168404Spjd return (0); 967168404Spjd} 968168404Spjd 969168404Spjdvoid 970168404Spjdvdev_metaslab_fini(vdev_t *vd) 971168404Spjd{ 972168404Spjd uint64_t m; 973168404Spjd uint64_t count = vd->vdev_ms_count; 974168404Spjd 975168404Spjd if (vd->vdev_ms != NULL) { 976219089Spjd metaslab_group_passivate(vd->vdev_mg); 977262094Savg for (m = 0; m < count; m++) { 978262094Savg metaslab_t *msp = vd->vdev_ms[m]; 979262094Savg 980262094Savg if (msp != NULL) 981262094Savg metaslab_fini(msp); 982262094Savg } 983168404Spjd kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); 984168404Spjd vd->vdev_ms = NULL; 985168404Spjd } 986168404Spjd} 987168404Spjd 988185029Spjdtypedef struct vdev_probe_stats { 989185029Spjd boolean_t vps_readable; 990185029Spjd boolean_t vps_writeable; 991185029Spjd int vps_flags; 992185029Spjd} vdev_probe_stats_t; 993185029Spjd 994185029Spjdstatic void 995185029Spjdvdev_probe_done(zio_t *zio) 996185029Spjd{ 997209962Smm spa_t *spa = zio->io_spa; 998209962Smm vdev_t *vd = zio->io_vd; 999185029Spjd vdev_probe_stats_t *vps = zio->io_private; 1000185029Spjd 1001209962Smm ASSERT(vd->vdev_probe_zio != NULL); 1002209962Smm 1003185029Spjd if (zio->io_type == ZIO_TYPE_READ) { 1004185029Spjd if (zio->io_error == 0) 1005185029Spjd vps->vps_readable = 1; 1006209962Smm if (zio->io_error == 0 && spa_writeable(spa)) { 1007209962Smm zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd, 1008185029Spjd zio->io_offset, zio->io_size, zio->io_data, 1009185029Spjd ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 1010185029Spjd ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); 1011185029Spjd } else { 1012185029Spjd zio_buf_free(zio->io_data, zio->io_size); 1013185029Spjd } 1014185029Spjd } else if (zio->io_type == ZIO_TYPE_WRITE) { 1015185029Spjd if (zio->io_error == 0) 1016185029Spjd vps->vps_writeable = 1; 1017185029Spjd zio_buf_free(zio->io_data, zio->io_size); 1018185029Spjd } else if (zio->io_type == ZIO_TYPE_NULL) { 1019209962Smm zio_t *pio; 1020185029Spjd 1021185029Spjd vd->vdev_cant_read |= !vps->vps_readable; 1022185029Spjd vd->vdev_cant_write |= !vps->vps_writeable; 1023185029Spjd 1024185029Spjd if (vdev_readable(vd) && 1025209962Smm (vdev_writeable(vd) || !spa_writeable(spa))) { 1026185029Spjd zio->io_error = 0; 1027185029Spjd } else { 1028185029Spjd ASSERT(zio->io_error != 0); 1029185029Spjd zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE, 1030209962Smm spa, vd, NULL, 0, 0); 1031249643Smm zio->io_error = SET_ERROR(ENXIO); 1032185029Spjd } 1033209962Smm 1034209962Smm mutex_enter(&vd->vdev_probe_lock); 1035209962Smm ASSERT(vd->vdev_probe_zio == zio); 1036209962Smm vd->vdev_probe_zio = NULL; 1037209962Smm mutex_exit(&vd->vdev_probe_lock); 1038209962Smm 1039209962Smm while ((pio = zio_walk_parents(zio)) != NULL) 1040209962Smm if (!vdev_accessible(vd, pio)) 1041249643Smm pio->io_error = SET_ERROR(ENXIO); 1042209962Smm 1043185029Spjd kmem_free(vps, sizeof (*vps)); 1044185029Spjd } 1045185029Spjd} 1046185029Spjd 1047168404Spjd/* 1048252751Sdelphij * Determine whether this device is accessible. 1049252751Sdelphij * 1050252751Sdelphij * Read and write to several known locations: the pad regions of each 1051252751Sdelphij * vdev label but the first, which we leave alone in case it contains 1052252751Sdelphij * a VTOC. 1053185029Spjd */ 1054185029Spjdzio_t * 1055209962Smmvdev_probe(vdev_t *vd, zio_t *zio) 1056185029Spjd{ 1057185029Spjd spa_t *spa = vd->vdev_spa; 1058209962Smm vdev_probe_stats_t *vps = NULL; 1059209962Smm zio_t *pio; 1060185029Spjd 1061209962Smm ASSERT(vd->vdev_ops->vdev_op_leaf); 1062185029Spjd 1063209962Smm /* 1064209962Smm * Don't probe the probe. 1065209962Smm */ 1066209962Smm if (zio && (zio->io_flags & ZIO_FLAG_PROBE)) 1067209962Smm return (NULL); 1068185029Spjd 1069209962Smm /* 1070209962Smm * To prevent 'probe storms' when a device fails, we create 1071209962Smm * just one probe i/o at a time. All zios that want to probe 1072209962Smm * this vdev will become parents of the probe io. 1073209962Smm */ 1074209962Smm mutex_enter(&vd->vdev_probe_lock); 1075209962Smm 1076209962Smm if ((pio = vd->vdev_probe_zio) == NULL) { 1077209962Smm vps = kmem_zalloc(sizeof (*vps), KM_SLEEP); 1078209962Smm 1079209962Smm vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | 1080209962Smm ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | 1081213198Smm ZIO_FLAG_TRYHARD; 1082209962Smm 1083209962Smm if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { 1084209962Smm /* 1085209962Smm * vdev_cant_read and vdev_cant_write can only 1086209962Smm * transition from TRUE to FALSE when we have the 1087209962Smm * SCL_ZIO lock as writer; otherwise they can only 1088209962Smm * transition from FALSE to TRUE. This ensures that 1089209962Smm * any zio looking at these values can assume that 1090209962Smm * failures persist for the life of the I/O. That's 1091209962Smm * important because when a device has intermittent 1092209962Smm * connectivity problems, we want to ensure that 1093209962Smm * they're ascribed to the device (ENXIO) and not 1094209962Smm * the zio (EIO). 1095209962Smm * 1096209962Smm * Since we hold SCL_ZIO as writer here, clear both 1097209962Smm * values so the probe can reevaluate from first 1098209962Smm * principles. 1099209962Smm */ 1100209962Smm vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; 1101209962Smm vd->vdev_cant_read = B_FALSE; 1102209962Smm vd->vdev_cant_write = B_FALSE; 1103209962Smm } 1104209962Smm 1105209962Smm vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd, 1106209962Smm vdev_probe_done, vps, 1107209962Smm vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE); 1108209962Smm 1109219089Spjd /* 1110219089Spjd * We can't change the vdev state in this context, so we 1111219089Spjd * kick off an async task to do it on our behalf. 1112219089Spjd */ 1113209962Smm if (zio != NULL) { 1114209962Smm vd->vdev_probe_wanted = B_TRUE; 1115209962Smm spa_async_request(spa, SPA_ASYNC_PROBE); 1116209962Smm } 1117185029Spjd } 1118185029Spjd 1119209962Smm if (zio != NULL) 1120209962Smm zio_add_child(zio, pio); 1121185029Spjd 1122209962Smm mutex_exit(&vd->vdev_probe_lock); 1123185029Spjd 1124209962Smm if (vps == NULL) { 1125209962Smm ASSERT(zio != NULL); 1126209962Smm return (NULL); 1127209962Smm } 1128185029Spjd 1129185029Spjd for (int l = 1; l < VDEV_LABELS; l++) { 1130209962Smm zio_nowait(zio_read_phys(pio, vd, 1131185029Spjd vdev_label_offset(vd->vdev_psize, l, 1132209962Smm offsetof(vdev_label_t, vl_pad2)), 1133209962Smm VDEV_PAD_SIZE, zio_buf_alloc(VDEV_PAD_SIZE), 1134185029Spjd ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 1135185029Spjd ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); 1136185029Spjd } 1137185029Spjd 1138209962Smm if (zio == NULL) 1139209962Smm return (pio); 1140209962Smm 1141209962Smm zio_nowait(pio); 1142209962Smm return (NULL); 1143185029Spjd} 1144185029Spjd 1145219089Spjdstatic void 1146219089Spjdvdev_open_child(void *arg) 1147219089Spjd{ 1148219089Spjd vdev_t *vd = arg; 1149219089Spjd 1150219089Spjd vd->vdev_open_thread = curthread; 1151219089Spjd vd->vdev_open_error = vdev_open(vd); 1152219089Spjd vd->vdev_open_thread = NULL; 1153219089Spjd} 1154219089Spjd 1155219089Spjdboolean_t 1156219089Spjdvdev_uses_zvols(vdev_t *vd) 1157219089Spjd{ 1158219089Spjd if (vd->vdev_path && strncmp(vd->vdev_path, ZVOL_DIR, 1159219089Spjd strlen(ZVOL_DIR)) == 0) 1160219089Spjd return (B_TRUE); 1161219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1162219089Spjd if (vdev_uses_zvols(vd->vdev_child[c])) 1163219089Spjd return (B_TRUE); 1164219089Spjd return (B_FALSE); 1165219089Spjd} 1166219089Spjd 1167219089Spjdvoid 1168219089Spjdvdev_open_children(vdev_t *vd) 1169219089Spjd{ 1170219089Spjd taskq_t *tq; 1171219089Spjd int children = vd->vdev_children; 1172219089Spjd 1173219089Spjd /* 1174219089Spjd * in order to handle pools on top of zvols, do the opens 1175219089Spjd * in a single thread so that the same thread holds the 1176219089Spjd * spa_namespace_lock 1177219089Spjd */ 1178219089Spjd if (B_TRUE || vdev_uses_zvols(vd)) { 1179219089Spjd for (int c = 0; c < children; c++) 1180219089Spjd vd->vdev_child[c]->vdev_open_error = 1181219089Spjd vdev_open(vd->vdev_child[c]); 1182219089Spjd return; 1183219089Spjd } 1184219089Spjd tq = taskq_create("vdev_open", children, minclsyspri, 1185219089Spjd children, children, TASKQ_PREPOPULATE); 1186219089Spjd 1187219089Spjd for (int c = 0; c < children; c++) 1188219089Spjd VERIFY(taskq_dispatch(tq, vdev_open_child, vd->vdev_child[c], 1189219089Spjd TQ_SLEEP) != 0); 1190219089Spjd 1191219089Spjd taskq_destroy(tq); 1192219089Spjd} 1193219089Spjd 1194185029Spjd/* 1195168404Spjd * Prepare a virtual device for access. 1196168404Spjd */ 1197168404Spjdint 1198168404Spjdvdev_open(vdev_t *vd) 1199168404Spjd{ 1200209962Smm spa_t *spa = vd->vdev_spa; 1201168404Spjd int error; 1202168404Spjd uint64_t osize = 0; 1203236839Smm uint64_t max_osize = 0; 1204236839Smm uint64_t asize, max_asize, psize; 1205262081Savg uint64_t logical_ashift = 0; 1206262081Savg uint64_t physical_ashift = 0; 1207168404Spjd 1208219089Spjd ASSERT(vd->vdev_open_thread == curthread || 1209219089Spjd spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1210168404Spjd ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || 1211168404Spjd vd->vdev_state == VDEV_STATE_CANT_OPEN || 1212168404Spjd vd->vdev_state == VDEV_STATE_OFFLINE); 1213168404Spjd 1214168404Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 1215213197Smm vd->vdev_cant_read = B_FALSE; 1216213197Smm vd->vdev_cant_write = B_FALSE; 1217219089Spjd vd->vdev_min_asize = vdev_get_min_asize(vd); 1218168404Spjd 1219219089Spjd /* 1220219089Spjd * If this vdev is not removed, check its fault status. If it's 1221219089Spjd * faulted, bail out of the open. 1222219089Spjd */ 1223185029Spjd if (!vd->vdev_removed && vd->vdev_faulted) { 1224168404Spjd ASSERT(vd->vdev_children == 0); 1225219089Spjd ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || 1226219089Spjd vd->vdev_label_aux == VDEV_AUX_EXTERNAL); 1227185029Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1228219089Spjd vd->vdev_label_aux); 1229249643Smm return (SET_ERROR(ENXIO)); 1230185029Spjd } else if (vd->vdev_offline) { 1231185029Spjd ASSERT(vd->vdev_children == 0); 1232168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); 1233249643Smm return (SET_ERROR(ENXIO)); 1234168404Spjd } 1235168404Spjd 1236262081Savg error = vd->vdev_ops->vdev_op_open(vd, &osize, &max_osize, 1237262081Savg &logical_ashift, &physical_ashift); 1238168404Spjd 1239219089Spjd /* 1240219089Spjd * Reset the vdev_reopening flag so that we actually close 1241219089Spjd * the vdev on error. 1242219089Spjd */ 1243219089Spjd vd->vdev_reopening = B_FALSE; 1244168404Spjd if (zio_injection_enabled && error == 0) 1245213198Smm error = zio_handle_device_injection(vd, NULL, ENXIO); 1246168404Spjd 1247185029Spjd if (error) { 1248185029Spjd if (vd->vdev_removed && 1249185029Spjd vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) 1250185029Spjd vd->vdev_removed = B_FALSE; 1251168404Spjd 1252168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1253168404Spjd vd->vdev_stat.vs_aux); 1254168404Spjd return (error); 1255168404Spjd } 1256168404Spjd 1257185029Spjd vd->vdev_removed = B_FALSE; 1258168404Spjd 1259219089Spjd /* 1260219089Spjd * Recheck the faulted flag now that we have confirmed that 1261219089Spjd * the vdev is accessible. If we're faulted, bail. 1262219089Spjd */ 1263219089Spjd if (vd->vdev_faulted) { 1264219089Spjd ASSERT(vd->vdev_children == 0); 1265219089Spjd ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || 1266219089Spjd vd->vdev_label_aux == VDEV_AUX_EXTERNAL); 1267219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1268219089Spjd vd->vdev_label_aux); 1269249643Smm return (SET_ERROR(ENXIO)); 1270219089Spjd } 1271219089Spjd 1272185029Spjd if (vd->vdev_degraded) { 1273185029Spjd ASSERT(vd->vdev_children == 0); 1274185029Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 1275185029Spjd VDEV_AUX_ERR_EXCEEDED); 1276185029Spjd } else { 1277219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_HEALTHY, 0); 1278185029Spjd } 1279185029Spjd 1280219089Spjd /* 1281219089Spjd * For hole or missing vdevs we just return success. 1282219089Spjd */ 1283219089Spjd if (vd->vdev_ishole || vd->vdev_ops == &vdev_missing_ops) 1284219089Spjd return (0); 1285219089Spjd 1286251419Ssmh if (vd->vdev_ops->vdev_op_leaf) { 1287251419Ssmh vd->vdev_notrim = B_FALSE; 1288251419Ssmh trim_map_create(vd); 1289251419Ssmh } 1290251419Ssmh 1291219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 1292168404Spjd if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { 1293168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 1294168404Spjd VDEV_AUX_NONE); 1295168404Spjd break; 1296168404Spjd } 1297219089Spjd } 1298168404Spjd 1299168404Spjd osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); 1300236839Smm max_osize = P2ALIGN(max_osize, (uint64_t)sizeof (vdev_label_t)); 1301168404Spjd 1302168404Spjd if (vd->vdev_children == 0) { 1303168404Spjd if (osize < SPA_MINDEVSIZE) { 1304168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1305168404Spjd VDEV_AUX_TOO_SMALL); 1306249643Smm return (SET_ERROR(EOVERFLOW)); 1307168404Spjd } 1308168404Spjd psize = osize; 1309168404Spjd asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); 1310236839Smm max_asize = max_osize - (VDEV_LABEL_START_SIZE + 1311236839Smm VDEV_LABEL_END_SIZE); 1312168404Spjd } else { 1313168404Spjd if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - 1314168404Spjd (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { 1315168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1316168404Spjd VDEV_AUX_TOO_SMALL); 1317249643Smm return (SET_ERROR(EOVERFLOW)); 1318168404Spjd } 1319168404Spjd psize = 0; 1320168404Spjd asize = osize; 1321236839Smm max_asize = max_osize; 1322168404Spjd } 1323168404Spjd 1324168404Spjd vd->vdev_psize = psize; 1325168404Spjd 1326219089Spjd /* 1327219089Spjd * Make sure the allocatable size hasn't shrunk. 1328219089Spjd */ 1329219089Spjd if (asize < vd->vdev_min_asize) { 1330219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1331219089Spjd VDEV_AUX_BAD_LABEL); 1332249643Smm return (SET_ERROR(EINVAL)); 1333219089Spjd } 1334219089Spjd 1335262081Savg vd->vdev_physical_ashift = 1336262081Savg MAX(physical_ashift, vd->vdev_physical_ashift); 1337262081Savg vd->vdev_logical_ashift = MAX(logical_ashift, vd->vdev_logical_ashift); 1338262081Savg vd->vdev_ashift = MAX(vd->vdev_logical_ashift, vd->vdev_ashift); 1339262081Savg 1340262081Savg if (vd->vdev_logical_ashift > SPA_MAXASHIFT) { 1341262081Savg vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1342262081Savg VDEV_AUX_ASHIFT_TOO_BIG); 1343262081Savg return (EINVAL); 1344262081Savg } 1345262081Savg 1346168404Spjd if (vd->vdev_asize == 0) { 1347168404Spjd /* 1348168404Spjd * This is the first-ever open, so use the computed values. 1349168404Spjd * For testing purposes, a higher ashift can be requested. 1350168404Spjd */ 1351168404Spjd vd->vdev_asize = asize; 1352236839Smm vd->vdev_max_asize = max_asize; 1353168404Spjd } else { 1354168404Spjd /* 1355262081Savg * Make sure the alignment requirement hasn't increased. 1356168404Spjd */ 1357262081Savg if (vd->vdev_ashift > vd->vdev_top->vdev_ashift && 1358262077Savg vd->vdev_ops->vdev_op_leaf) { 1359262081Savg vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1360262081Savg VDEV_AUX_BAD_LABEL); 1361262081Savg return (EINVAL); 1362168404Spjd } 1363236839Smm vd->vdev_max_asize = max_asize; 1364219089Spjd } 1365168404Spjd 1366219089Spjd /* 1367219089Spjd * If all children are healthy and the asize has increased, 1368219089Spjd * then we've experienced dynamic LUN growth. If automatic 1369219089Spjd * expansion is enabled then use the additional space. 1370219089Spjd */ 1371219089Spjd if (vd->vdev_state == VDEV_STATE_HEALTHY && asize > vd->vdev_asize && 1372219089Spjd (vd->vdev_expanding || spa->spa_autoexpand)) 1373219089Spjd vd->vdev_asize = asize; 1374168404Spjd 1375219089Spjd vdev_set_min_asize(vd); 1376168404Spjd 1377168404Spjd /* 1378185029Spjd * Ensure we can issue some IO before declaring the 1379185029Spjd * vdev open for business. 1380185029Spjd */ 1381185029Spjd if (vd->vdev_ops->vdev_op_leaf && 1382185029Spjd (error = zio_wait(vdev_probe(vd, NULL))) != 0) { 1383219089Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 1384219089Spjd VDEV_AUX_ERR_EXCEEDED); 1385185029Spjd return (error); 1386185029Spjd } 1387185029Spjd 1388185029Spjd /* 1389185029Spjd * If a leaf vdev has a DTL, and seems healthy, then kick off a 1390209962Smm * resilver. But don't do this if we are doing a reopen for a scrub, 1391209962Smm * since this would just restart the scrub we are already doing. 1392168404Spjd */ 1393209962Smm if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen && 1394209962Smm vdev_resilver_needed(vd, NULL, NULL)) 1395209962Smm spa_async_request(spa, SPA_ASYNC_RESILVER); 1396168404Spjd 1397168404Spjd return (0); 1398168404Spjd} 1399168404Spjd 1400168404Spjd/* 1401168404Spjd * Called once the vdevs are all opened, this routine validates the label 1402168404Spjd * contents. This needs to be done before vdev_load() so that we don't 1403185029Spjd * inadvertently do repair I/Os to the wrong device. 1404168404Spjd * 1405231141Smm * If 'strict' is false ignore the spa guid check. This is necessary because 1406231141Smm * if the machine crashed during a re-guid the new guid might have been written 1407231141Smm * to all of the vdev labels, but not the cached config. The strict check 1408231141Smm * will be performed when the pool is opened again using the mos config. 1409231141Smm * 1410168404Spjd * This function will only return failure if one of the vdevs indicates that it 1411168404Spjd * has since been destroyed or exported. This is only possible if 1412168404Spjd * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state 1413168404Spjd * will be updated but the function will return 0. 1414168404Spjd */ 1415168404Spjdint 1416231141Smmvdev_validate(vdev_t *vd, boolean_t strict) 1417168404Spjd{ 1418168404Spjd spa_t *spa = vd->vdev_spa; 1419168404Spjd nvlist_t *label; 1420219089Spjd uint64_t guid = 0, top_guid; 1421168404Spjd uint64_t state; 1422168404Spjd 1423219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1424231141Smm if (vdev_validate(vd->vdev_child[c], strict) != 0) 1425249643Smm return (SET_ERROR(EBADF)); 1426168404Spjd 1427168404Spjd /* 1428168404Spjd * If the device has already failed, or was marked offline, don't do 1429168404Spjd * any further validation. Otherwise, label I/O will fail and we will 1430168404Spjd * overwrite the previous state. 1431168404Spjd */ 1432185029Spjd if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { 1433219089Spjd uint64_t aux_guid = 0; 1434219089Spjd nvlist_t *nvl; 1435247406Smm uint64_t txg = spa_last_synced_txg(spa) != 0 ? 1436247406Smm spa_last_synced_txg(spa) : -1ULL; 1437168404Spjd 1438243674Smm if ((label = vdev_label_read_config(vd, txg)) == NULL) { 1439168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1440168404Spjd VDEV_AUX_BAD_LABEL); 1441168404Spjd return (0); 1442168404Spjd } 1443168404Spjd 1444219089Spjd /* 1445219089Spjd * Determine if this vdev has been split off into another 1446219089Spjd * pool. If so, then refuse to open it. 1447219089Spjd */ 1448219089Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_SPLIT_GUID, 1449219089Spjd &aux_guid) == 0 && aux_guid == spa_guid(spa)) { 1450219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1451219089Spjd VDEV_AUX_SPLIT_POOL); 1452219089Spjd nvlist_free(label); 1453219089Spjd return (0); 1454219089Spjd } 1455219089Spjd 1456231141Smm if (strict && (nvlist_lookup_uint64(label, 1457231141Smm ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 1458231141Smm guid != spa_guid(spa))) { 1459168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1460168404Spjd VDEV_AUX_CORRUPT_DATA); 1461168404Spjd nvlist_free(label); 1462168404Spjd return (0); 1463168404Spjd } 1464168404Spjd 1465219089Spjd if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvl) 1466219089Spjd != 0 || nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_ORIG_GUID, 1467219089Spjd &aux_guid) != 0) 1468219089Spjd aux_guid = 0; 1469219089Spjd 1470185029Spjd /* 1471185029Spjd * If this vdev just became a top-level vdev because its 1472185029Spjd * sibling was detached, it will have adopted the parent's 1473185029Spjd * vdev guid -- but the label may or may not be on disk yet. 1474185029Spjd * Fortunately, either version of the label will have the 1475185029Spjd * same top guid, so if we're a top-level vdev, we can 1476185029Spjd * safely compare to that instead. 1477219089Spjd * 1478219089Spjd * If we split this vdev off instead, then we also check the 1479219089Spjd * original pool's guid. We don't want to consider the vdev 1480219089Spjd * corrupt if it is partway through a split operation. 1481185029Spjd */ 1482168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, 1483185029Spjd &guid) != 0 || 1484185029Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, 1485185029Spjd &top_guid) != 0 || 1486219089Spjd ((vd->vdev_guid != guid && vd->vdev_guid != aux_guid) && 1487185029Spjd (vd->vdev_guid != top_guid || vd != vd->vdev_top))) { 1488168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1489168404Spjd VDEV_AUX_CORRUPT_DATA); 1490168404Spjd nvlist_free(label); 1491168404Spjd return (0); 1492168404Spjd } 1493168404Spjd 1494168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, 1495168404Spjd &state) != 0) { 1496168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1497168404Spjd VDEV_AUX_CORRUPT_DATA); 1498168404Spjd nvlist_free(label); 1499168404Spjd return (0); 1500168404Spjd } 1501168404Spjd 1502168404Spjd nvlist_free(label); 1503168404Spjd 1504209962Smm /* 1505219089Spjd * If this is a verbatim import, no need to check the 1506209962Smm * state of the pool. 1507209962Smm */ 1508219089Spjd if (!(spa->spa_import_flags & ZFS_IMPORT_VERBATIM) && 1509219089Spjd spa_load_state(spa) == SPA_LOAD_OPEN && 1510168404Spjd state != POOL_STATE_ACTIVE) 1511249643Smm return (SET_ERROR(EBADF)); 1512185029Spjd 1513185029Spjd /* 1514185029Spjd * If we were able to open and validate a vdev that was 1515185029Spjd * previously marked permanently unavailable, clear that state 1516185029Spjd * now. 1517185029Spjd */ 1518185029Spjd if (vd->vdev_not_present) 1519185029Spjd vd->vdev_not_present = 0; 1520168404Spjd } 1521168404Spjd 1522168404Spjd return (0); 1523168404Spjd} 1524168404Spjd 1525168404Spjd/* 1526168404Spjd * Close a virtual device. 1527168404Spjd */ 1528168404Spjdvoid 1529168404Spjdvdev_close(vdev_t *vd) 1530168404Spjd{ 1531209962Smm spa_t *spa = vd->vdev_spa; 1532219089Spjd vdev_t *pvd = vd->vdev_parent; 1533209962Smm 1534209962Smm ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1535209962Smm 1536219089Spjd /* 1537219089Spjd * If our parent is reopening, then we are as well, unless we are 1538219089Spjd * going offline. 1539219089Spjd */ 1540219089Spjd if (pvd != NULL && pvd->vdev_reopening) 1541219089Spjd vd->vdev_reopening = (pvd->vdev_reopening && !vd->vdev_offline); 1542219089Spjd 1543168404Spjd vd->vdev_ops->vdev_op_close(vd); 1544168404Spjd 1545185029Spjd vdev_cache_purge(vd); 1546168404Spjd 1547251419Ssmh if (vd->vdev_ops->vdev_op_leaf) 1548251419Ssmh trim_map_destroy(vd); 1549251419Ssmh 1550168404Spjd /* 1551219089Spjd * We record the previous state before we close it, so that if we are 1552168404Spjd * doing a reopen(), we don't generate FMA ereports if we notice that 1553168404Spjd * it's still faulted. 1554168404Spjd */ 1555168404Spjd vd->vdev_prevstate = vd->vdev_state; 1556168404Spjd 1557168404Spjd if (vd->vdev_offline) 1558168404Spjd vd->vdev_state = VDEV_STATE_OFFLINE; 1559168404Spjd else 1560168404Spjd vd->vdev_state = VDEV_STATE_CLOSED; 1561168404Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 1562168404Spjd} 1563168404Spjd 1564168404Spjdvoid 1565219089Spjdvdev_hold(vdev_t *vd) 1566219089Spjd{ 1567219089Spjd spa_t *spa = vd->vdev_spa; 1568219089Spjd 1569219089Spjd ASSERT(spa_is_root(spa)); 1570219089Spjd if (spa->spa_state == POOL_STATE_UNINITIALIZED) 1571219089Spjd return; 1572219089Spjd 1573219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1574219089Spjd vdev_hold(vd->vdev_child[c]); 1575219089Spjd 1576219089Spjd if (vd->vdev_ops->vdev_op_leaf) 1577219089Spjd vd->vdev_ops->vdev_op_hold(vd); 1578219089Spjd} 1579219089Spjd 1580219089Spjdvoid 1581219089Spjdvdev_rele(vdev_t *vd) 1582219089Spjd{ 1583219089Spjd spa_t *spa = vd->vdev_spa; 1584219089Spjd 1585219089Spjd ASSERT(spa_is_root(spa)); 1586219089Spjd for (int c = 0; c < vd->vdev_children; c++) 1587219089Spjd vdev_rele(vd->vdev_child[c]); 1588219089Spjd 1589219089Spjd if (vd->vdev_ops->vdev_op_leaf) 1590219089Spjd vd->vdev_ops->vdev_op_rele(vd); 1591219089Spjd} 1592219089Spjd 1593219089Spjd/* 1594219089Spjd * Reopen all interior vdevs and any unopened leaves. We don't actually 1595219089Spjd * reopen leaf vdevs which had previously been opened as they might deadlock 1596219089Spjd * on the spa_config_lock. Instead we only obtain the leaf's physical size. 1597219089Spjd * If the leaf has never been opened then open it, as usual. 1598219089Spjd */ 1599219089Spjdvoid 1600168404Spjdvdev_reopen(vdev_t *vd) 1601168404Spjd{ 1602168404Spjd spa_t *spa = vd->vdev_spa; 1603168404Spjd 1604185029Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1605168404Spjd 1606219089Spjd /* set the reopening flag unless we're taking the vdev offline */ 1607219089Spjd vd->vdev_reopening = !vd->vdev_offline; 1608168404Spjd vdev_close(vd); 1609168404Spjd (void) vdev_open(vd); 1610168404Spjd 1611168404Spjd /* 1612168404Spjd * Call vdev_validate() here to make sure we have the same device. 1613168404Spjd * Otherwise, a device with an invalid label could be successfully 1614168404Spjd * opened in response to vdev_reopen(). 1615168404Spjd */ 1616185029Spjd if (vd->vdev_aux) { 1617185029Spjd (void) vdev_validate_aux(vd); 1618185029Spjd if (vdev_readable(vd) && vdev_writeable(vd) && 1619209962Smm vd->vdev_aux == &spa->spa_l2cache && 1620219089Spjd !l2arc_vdev_present(vd)) 1621219089Spjd l2arc_add_vdev(spa, vd); 1622185029Spjd } else { 1623247406Smm (void) vdev_validate(vd, B_TRUE); 1624185029Spjd } 1625168404Spjd 1626168404Spjd /* 1627185029Spjd * Reassess parent vdev's health. 1628168404Spjd */ 1629185029Spjd vdev_propagate_state(vd); 1630168404Spjd} 1631168404Spjd 1632168404Spjdint 1633168404Spjdvdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) 1634168404Spjd{ 1635168404Spjd int error; 1636168404Spjd 1637168404Spjd /* 1638168404Spjd * Normally, partial opens (e.g. of a mirror) are allowed. 1639168404Spjd * For a create, however, we want to fail the request if 1640168404Spjd * there are any components we can't open. 1641168404Spjd */ 1642168404Spjd error = vdev_open(vd); 1643168404Spjd 1644168404Spjd if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { 1645168404Spjd vdev_close(vd); 1646168404Spjd return (error ? error : ENXIO); 1647168404Spjd } 1648168404Spjd 1649168404Spjd /* 1650262094Savg * Recursively load DTLs and initialize all labels. 1651168404Spjd */ 1652262094Savg if ((error = vdev_dtl_load(vd)) != 0 || 1653262094Savg (error = vdev_label_init(vd, txg, isreplacing ? 1654168404Spjd VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { 1655168404Spjd vdev_close(vd); 1656168404Spjd return (error); 1657168404Spjd } 1658168404Spjd 1659168404Spjd return (0); 1660168404Spjd} 1661168404Spjd 1662168404Spjdvoid 1663219089Spjdvdev_metaslab_set_size(vdev_t *vd) 1664168404Spjd{ 1665168404Spjd /* 1666168404Spjd * Aim for roughly 200 metaslabs per vdev. 1667168404Spjd */ 1668265751Sdelphij vd->vdev_ms_shift = highbit64(vd->vdev_asize / 200); 1669168404Spjd vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); 1670168404Spjd} 1671168404Spjd 1672262081Savg/* 1673266123Ssmh * Maximize performance by inflating the configured ashift for top level 1674266123Ssmh * vdevs to be as close to the physical ashift as possible while maintaining 1675266123Ssmh * administrator defined limits and ensuring it doesn't go below the 1676266123Ssmh * logical ashift. 1677262081Savg */ 1678168404Spjdvoid 1679262081Savgvdev_ashift_optimize(vdev_t *vd) 1680262081Savg{ 1681266123Ssmh if (vd == vd->vdev_top) { 1682266123Ssmh if (vd->vdev_ashift < vd->vdev_physical_ashift) { 1683266123Ssmh vd->vdev_ashift = MIN( 1684266123Ssmh MAX(zfs_max_auto_ashift, vd->vdev_ashift), 1685266123Ssmh MAX(zfs_min_auto_ashift, vd->vdev_physical_ashift)); 1686266123Ssmh } else { 1687266123Ssmh /* 1688266123Ssmh * Unusual case where logical ashift > physical ashift 1689266123Ssmh * so we can't cap the calculated ashift based on max 1690266123Ssmh * ashift as that would cause failures. 1691266123Ssmh * We still check if we need to increase it to match 1692266123Ssmh * the min ashift. 1693266123Ssmh */ 1694266123Ssmh vd->vdev_ashift = MAX(zfs_min_auto_ashift, 1695266123Ssmh vd->vdev_ashift); 1696266123Ssmh } 1697262081Savg } 1698262081Savg} 1699262081Savg 1700262081Savgvoid 1701168404Spjdvdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) 1702168404Spjd{ 1703168404Spjd ASSERT(vd == vd->vdev_top); 1704219089Spjd ASSERT(!vd->vdev_ishole); 1705168404Spjd ASSERT(ISP2(flags)); 1706219089Spjd ASSERT(spa_writeable(vd->vdev_spa)); 1707168404Spjd 1708168404Spjd if (flags & VDD_METASLAB) 1709168404Spjd (void) txg_list_add(&vd->vdev_ms_list, arg, txg); 1710168404Spjd 1711168404Spjd if (flags & VDD_DTL) 1712168404Spjd (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); 1713168404Spjd 1714168404Spjd (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); 1715168404Spjd} 1716168404Spjd 1717262094Savgvoid 1718262094Savgvdev_dirty_leaves(vdev_t *vd, int flags, uint64_t txg) 1719262094Savg{ 1720262094Savg for (int c = 0; c < vd->vdev_children; c++) 1721262094Savg vdev_dirty_leaves(vd->vdev_child[c], flags, txg); 1722262094Savg 1723262094Savg if (vd->vdev_ops->vdev_op_leaf) 1724262094Savg vdev_dirty(vd->vdev_top, flags, vd, txg); 1725262094Savg} 1726262094Savg 1727209962Smm/* 1728209962Smm * DTLs. 1729209962Smm * 1730209962Smm * A vdev's DTL (dirty time log) is the set of transaction groups for which 1731219089Spjd * the vdev has less than perfect replication. There are four kinds of DTL: 1732209962Smm * 1733209962Smm * DTL_MISSING: txgs for which the vdev has no valid copies of the data 1734209962Smm * 1735209962Smm * DTL_PARTIAL: txgs for which data is available, but not fully replicated 1736209962Smm * 1737209962Smm * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon 1738209962Smm * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of 1739209962Smm * txgs that was scrubbed. 1740209962Smm * 1741209962Smm * DTL_OUTAGE: txgs which cannot currently be read, whether due to 1742209962Smm * persistent errors or just some device being offline. 1743209962Smm * Unlike the other three, the DTL_OUTAGE map is not generally 1744209962Smm * maintained; it's only computed when needed, typically to 1745209962Smm * determine whether a device can be detached. 1746209962Smm * 1747209962Smm * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device 1748209962Smm * either has the data or it doesn't. 1749209962Smm * 1750209962Smm * For interior vdevs such as mirror and RAID-Z the picture is more complex. 1751209962Smm * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because 1752209962Smm * if any child is less than fully replicated, then so is its parent. 1753209962Smm * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs, 1754209962Smm * comprising only those txgs which appear in 'maxfaults' or more children; 1755209962Smm * those are the txgs we don't have enough replication to read. For example, 1756209962Smm * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2); 1757209962Smm * thus, its DTL_MISSING consists of the set of txgs that appear in more than 1758209962Smm * two child DTL_MISSING maps. 1759209962Smm * 1760209962Smm * It should be clear from the above that to compute the DTLs and outage maps 1761209962Smm * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps. 1762209962Smm * Therefore, that is all we keep on disk. When loading the pool, or after 1763209962Smm * a configuration change, we generate all other DTLs from first principles. 1764209962Smm */ 1765168404Spjdvoid 1766209962Smmvdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1767168404Spjd{ 1768262094Savg range_tree_t *rt = vd->vdev_dtl[t]; 1769209962Smm 1770209962Smm ASSERT(t < DTL_TYPES); 1771209962Smm ASSERT(vd != vd->vdev_spa->spa_root_vdev); 1772219089Spjd ASSERT(spa_writeable(vd->vdev_spa)); 1773209962Smm 1774262094Savg mutex_enter(rt->rt_lock); 1775262094Savg if (!range_tree_contains(rt, txg, size)) 1776262094Savg range_tree_add(rt, txg, size); 1777262094Savg mutex_exit(rt->rt_lock); 1778168404Spjd} 1779168404Spjd 1780209962Smmboolean_t 1781209962Smmvdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1782168404Spjd{ 1783262094Savg range_tree_t *rt = vd->vdev_dtl[t]; 1784209962Smm boolean_t dirty = B_FALSE; 1785168404Spjd 1786209962Smm ASSERT(t < DTL_TYPES); 1787209962Smm ASSERT(vd != vd->vdev_spa->spa_root_vdev); 1788168404Spjd 1789262094Savg mutex_enter(rt->rt_lock); 1790262094Savg if (range_tree_space(rt) != 0) 1791262094Savg dirty = range_tree_contains(rt, txg, size); 1792262094Savg mutex_exit(rt->rt_lock); 1793168404Spjd 1794168404Spjd return (dirty); 1795168404Spjd} 1796168404Spjd 1797209962Smmboolean_t 1798209962Smmvdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t) 1799209962Smm{ 1800262094Savg range_tree_t *rt = vd->vdev_dtl[t]; 1801209962Smm boolean_t empty; 1802209962Smm 1803262094Savg mutex_enter(rt->rt_lock); 1804262094Savg empty = (range_tree_space(rt) == 0); 1805262094Savg mutex_exit(rt->rt_lock); 1806209962Smm 1807209962Smm return (empty); 1808209962Smm} 1809209962Smm 1810168404Spjd/* 1811262086Savg * Returns the lowest txg in the DTL range. 1812262086Savg */ 1813262086Savgstatic uint64_t 1814262086Savgvdev_dtl_min(vdev_t *vd) 1815262086Savg{ 1816262094Savg range_seg_t *rs; 1817262086Savg 1818262086Savg ASSERT(MUTEX_HELD(&vd->vdev_dtl_lock)); 1819262094Savg ASSERT3U(range_tree_space(vd->vdev_dtl[DTL_MISSING]), !=, 0); 1820262086Savg ASSERT0(vd->vdev_children); 1821262086Savg 1822262094Savg rs = avl_first(&vd->vdev_dtl[DTL_MISSING]->rt_root); 1823262094Savg return (rs->rs_start - 1); 1824262086Savg} 1825262086Savg 1826262086Savg/* 1827262086Savg * Returns the highest txg in the DTL. 1828262086Savg */ 1829262086Savgstatic uint64_t 1830262086Savgvdev_dtl_max(vdev_t *vd) 1831262086Savg{ 1832262094Savg range_seg_t *rs; 1833262086Savg 1834262086Savg ASSERT(MUTEX_HELD(&vd->vdev_dtl_lock)); 1835262094Savg ASSERT3U(range_tree_space(vd->vdev_dtl[DTL_MISSING]), !=, 0); 1836262086Savg ASSERT0(vd->vdev_children); 1837262086Savg 1838262094Savg rs = avl_last(&vd->vdev_dtl[DTL_MISSING]->rt_root); 1839262094Savg return (rs->rs_end); 1840262086Savg} 1841262086Savg 1842262086Savg/* 1843262086Savg * Determine if a resilvering vdev should remove any DTL entries from 1844262086Savg * its range. If the vdev was resilvering for the entire duration of the 1845262086Savg * scan then it should excise that range from its DTLs. Otherwise, this 1846262086Savg * vdev is considered partially resilvered and should leave its DTL 1847262086Savg * entries intact. The comment in vdev_dtl_reassess() describes how we 1848262086Savg * excise the DTLs. 1849262086Savg */ 1850262086Savgstatic boolean_t 1851262086Savgvdev_dtl_should_excise(vdev_t *vd) 1852262086Savg{ 1853262086Savg spa_t *spa = vd->vdev_spa; 1854262086Savg dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; 1855262086Savg 1856262086Savg ASSERT0(scn->scn_phys.scn_errors); 1857262086Savg ASSERT0(vd->vdev_children); 1858262086Savg 1859262086Savg if (vd->vdev_resilver_txg == 0 || 1860262094Savg range_tree_space(vd->vdev_dtl[DTL_MISSING]) == 0) 1861262086Savg return (B_TRUE); 1862262086Savg 1863262086Savg /* 1864262086Savg * When a resilver is initiated the scan will assign the scn_max_txg 1865262086Savg * value to the highest txg value that exists in all DTLs. If this 1866262086Savg * device's max DTL is not part of this scan (i.e. it is not in 1867262086Savg * the range (scn_min_txg, scn_max_txg] then it is not eligible 1868262086Savg * for excision. 1869262086Savg */ 1870262086Savg if (vdev_dtl_max(vd) <= scn->scn_phys.scn_max_txg) { 1871262086Savg ASSERT3U(scn->scn_phys.scn_min_txg, <=, vdev_dtl_min(vd)); 1872262086Savg ASSERT3U(scn->scn_phys.scn_min_txg, <, vd->vdev_resilver_txg); 1873262086Savg ASSERT3U(vd->vdev_resilver_txg, <=, scn->scn_phys.scn_max_txg); 1874262086Savg return (B_TRUE); 1875262086Savg } 1876262086Savg return (B_FALSE); 1877262086Savg} 1878262086Savg 1879262086Savg/* 1880168404Spjd * Reassess DTLs after a config change or scrub completion. 1881168404Spjd */ 1882168404Spjdvoid 1883168404Spjdvdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) 1884168404Spjd{ 1885168404Spjd spa_t *spa = vd->vdev_spa; 1886209962Smm avl_tree_t reftree; 1887209962Smm int minref; 1888168404Spjd 1889209962Smm ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 1890168404Spjd 1891209962Smm for (int c = 0; c < vd->vdev_children; c++) 1892209962Smm vdev_dtl_reassess(vd->vdev_child[c], txg, 1893209962Smm scrub_txg, scrub_done); 1894209962Smm 1895219089Spjd if (vd == spa->spa_root_vdev || vd->vdev_ishole || vd->vdev_aux) 1896209962Smm return; 1897209962Smm 1898209962Smm if (vd->vdev_ops->vdev_op_leaf) { 1899219089Spjd dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; 1900219089Spjd 1901168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1902262086Savg 1903262086Savg /* 1904262086Savg * If we've completed a scan cleanly then determine 1905262086Savg * if this vdev should remove any DTLs. We only want to 1906262086Savg * excise regions on vdevs that were available during 1907262086Savg * the entire duration of this scan. 1908262086Savg */ 1909185029Spjd if (scrub_txg != 0 && 1910219089Spjd (spa->spa_scrub_started || 1911262086Savg (scn != NULL && scn->scn_phys.scn_errors == 0)) && 1912262086Savg vdev_dtl_should_excise(vd)) { 1913185029Spjd /* 1914185029Spjd * We completed a scrub up to scrub_txg. If we 1915185029Spjd * did it without rebooting, then the scrub dtl 1916185029Spjd * will be valid, so excise the old region and 1917185029Spjd * fold in the scrub dtl. Otherwise, leave the 1918185029Spjd * dtl as-is if there was an error. 1919209962Smm * 1920209962Smm * There's little trick here: to excise the beginning 1921209962Smm * of the DTL_MISSING map, we put it into a reference 1922209962Smm * tree and then add a segment with refcnt -1 that 1923209962Smm * covers the range [0, scrub_txg). This means 1924209962Smm * that each txg in that range has refcnt -1 or 0. 1925209962Smm * We then add DTL_SCRUB with a refcnt of 2, so that 1926209962Smm * entries in the range [0, scrub_txg) will have a 1927209962Smm * positive refcnt -- either 1 or 2. We then convert 1928209962Smm * the reference tree into the new DTL_MISSING map. 1929185029Spjd */ 1930262094Savg space_reftree_create(&reftree); 1931262094Savg space_reftree_add_map(&reftree, 1932262094Savg vd->vdev_dtl[DTL_MISSING], 1); 1933262094Savg space_reftree_add_seg(&reftree, 0, scrub_txg, -1); 1934262094Savg space_reftree_add_map(&reftree, 1935262094Savg vd->vdev_dtl[DTL_SCRUB], 2); 1936262094Savg space_reftree_generate_map(&reftree, 1937262094Savg vd->vdev_dtl[DTL_MISSING], 1); 1938262094Savg space_reftree_destroy(&reftree); 1939168404Spjd } 1940262094Savg range_tree_vacate(vd->vdev_dtl[DTL_PARTIAL], NULL, NULL); 1941262094Savg range_tree_walk(vd->vdev_dtl[DTL_MISSING], 1942262094Savg range_tree_add, vd->vdev_dtl[DTL_PARTIAL]); 1943168404Spjd if (scrub_done) 1944262094Savg range_tree_vacate(vd->vdev_dtl[DTL_SCRUB], NULL, NULL); 1945262094Savg range_tree_vacate(vd->vdev_dtl[DTL_OUTAGE], NULL, NULL); 1946209962Smm if (!vdev_readable(vd)) 1947262094Savg range_tree_add(vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL); 1948209962Smm else 1949262094Savg range_tree_walk(vd->vdev_dtl[DTL_MISSING], 1950262094Savg range_tree_add, vd->vdev_dtl[DTL_OUTAGE]); 1951262086Savg 1952262086Savg /* 1953262086Savg * If the vdev was resilvering and no longer has any 1954262086Savg * DTLs then reset its resilvering flag. 1955262086Savg */ 1956262086Savg if (vd->vdev_resilver_txg != 0 && 1957262094Savg range_tree_space(vd->vdev_dtl[DTL_MISSING]) == 0 && 1958262094Savg range_tree_space(vd->vdev_dtl[DTL_OUTAGE]) == 0) 1959262086Savg vd->vdev_resilver_txg = 0; 1960262086Savg 1961168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1962185029Spjd 1963168404Spjd if (txg != 0) 1964168404Spjd vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); 1965168404Spjd return; 1966168404Spjd } 1967168404Spjd 1968168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1969209962Smm for (int t = 0; t < DTL_TYPES; t++) { 1970209962Smm /* account for child's outage in parent's missing map */ 1971209962Smm int s = (t == DTL_MISSING) ? DTL_OUTAGE: t; 1972209962Smm if (t == DTL_SCRUB) 1973209962Smm continue; /* leaf vdevs only */ 1974209962Smm if (t == DTL_PARTIAL) 1975209962Smm minref = 1; /* i.e. non-zero */ 1976209962Smm else if (vd->vdev_nparity != 0) 1977209962Smm minref = vd->vdev_nparity + 1; /* RAID-Z */ 1978209962Smm else 1979209962Smm minref = vd->vdev_children; /* any kind of mirror */ 1980262094Savg space_reftree_create(&reftree); 1981209962Smm for (int c = 0; c < vd->vdev_children; c++) { 1982209962Smm vdev_t *cvd = vd->vdev_child[c]; 1983209962Smm mutex_enter(&cvd->vdev_dtl_lock); 1984262094Savg space_reftree_add_map(&reftree, cvd->vdev_dtl[s], 1); 1985209962Smm mutex_exit(&cvd->vdev_dtl_lock); 1986209962Smm } 1987262094Savg space_reftree_generate_map(&reftree, vd->vdev_dtl[t], minref); 1988262094Savg space_reftree_destroy(&reftree); 1989209962Smm } 1990168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1991168404Spjd} 1992168404Spjd 1993262094Savgint 1994168404Spjdvdev_dtl_load(vdev_t *vd) 1995168404Spjd{ 1996168404Spjd spa_t *spa = vd->vdev_spa; 1997168404Spjd objset_t *mos = spa->spa_meta_objset; 1998262094Savg int error = 0; 1999168404Spjd 2000262094Savg if (vd->vdev_ops->vdev_op_leaf && vd->vdev_dtl_object != 0) { 2001262094Savg ASSERT(!vd->vdev_ishole); 2002168404Spjd 2003262094Savg error = space_map_open(&vd->vdev_dtl_sm, mos, 2004262094Savg vd->vdev_dtl_object, 0, -1ULL, 0, &vd->vdev_dtl_lock); 2005262094Savg if (error) 2006262094Savg return (error); 2007262094Savg ASSERT(vd->vdev_dtl_sm != NULL); 2008168404Spjd 2009262094Savg mutex_enter(&vd->vdev_dtl_lock); 2010219089Spjd 2011262094Savg /* 2012262094Savg * Now that we've opened the space_map we need to update 2013262094Savg * the in-core DTL. 2014262094Savg */ 2015262094Savg space_map_update(vd->vdev_dtl_sm); 2016262094Savg 2017262094Savg error = space_map_load(vd->vdev_dtl_sm, 2018262094Savg vd->vdev_dtl[DTL_MISSING], SM_ALLOC); 2019262094Savg mutex_exit(&vd->vdev_dtl_lock); 2020262094Savg 2021168404Spjd return (error); 2022262094Savg } 2023168404Spjd 2024262094Savg for (int c = 0; c < vd->vdev_children; c++) { 2025262094Savg error = vdev_dtl_load(vd->vdev_child[c]); 2026262094Savg if (error != 0) 2027262094Savg break; 2028262094Savg } 2029168404Spjd 2030168404Spjd return (error); 2031168404Spjd} 2032168404Spjd 2033168404Spjdvoid 2034168404Spjdvdev_dtl_sync(vdev_t *vd, uint64_t txg) 2035168404Spjd{ 2036168404Spjd spa_t *spa = vd->vdev_spa; 2037262094Savg range_tree_t *rt = vd->vdev_dtl[DTL_MISSING]; 2038168404Spjd objset_t *mos = spa->spa_meta_objset; 2039262094Savg range_tree_t *rtsync; 2040262094Savg kmutex_t rtlock; 2041168404Spjd dmu_tx_t *tx; 2042262094Savg uint64_t object = space_map_object(vd->vdev_dtl_sm); 2043168404Spjd 2044219089Spjd ASSERT(!vd->vdev_ishole); 2045262094Savg ASSERT(vd->vdev_ops->vdev_op_leaf); 2046219089Spjd 2047168404Spjd tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 2048168404Spjd 2049262094Savg if (vd->vdev_detached || vd->vdev_top->vdev_removing) { 2050262094Savg mutex_enter(&vd->vdev_dtl_lock); 2051262094Savg space_map_free(vd->vdev_dtl_sm, tx); 2052262094Savg space_map_close(vd->vdev_dtl_sm); 2053262094Savg vd->vdev_dtl_sm = NULL; 2054262094Savg mutex_exit(&vd->vdev_dtl_lock); 2055168404Spjd dmu_tx_commit(tx); 2056168404Spjd return; 2057168404Spjd } 2058168404Spjd 2059262094Savg if (vd->vdev_dtl_sm == NULL) { 2060262094Savg uint64_t new_object; 2061262094Savg 2062262094Savg new_object = space_map_alloc(mos, tx); 2063262094Savg VERIFY3U(new_object, !=, 0); 2064262094Savg 2065262094Savg VERIFY0(space_map_open(&vd->vdev_dtl_sm, mos, new_object, 2066262094Savg 0, -1ULL, 0, &vd->vdev_dtl_lock)); 2067262094Savg ASSERT(vd->vdev_dtl_sm != NULL); 2068168404Spjd } 2069168404Spjd 2070262094Savg bzero(&rtlock, sizeof(rtlock)); 2071262094Savg mutex_init(&rtlock, NULL, MUTEX_DEFAULT, NULL); 2072168404Spjd 2073262094Savg rtsync = range_tree_create(NULL, NULL, &rtlock); 2074168404Spjd 2075262094Savg mutex_enter(&rtlock); 2076168404Spjd 2077168404Spjd mutex_enter(&vd->vdev_dtl_lock); 2078262094Savg range_tree_walk(rt, range_tree_add, rtsync); 2079168404Spjd mutex_exit(&vd->vdev_dtl_lock); 2080168404Spjd 2081262094Savg space_map_truncate(vd->vdev_dtl_sm, tx); 2082262094Savg space_map_write(vd->vdev_dtl_sm, rtsync, SM_ALLOC, tx); 2083262094Savg range_tree_vacate(rtsync, NULL, NULL); 2084168404Spjd 2085262094Savg range_tree_destroy(rtsync); 2086168404Spjd 2087262094Savg mutex_exit(&rtlock); 2088262094Savg mutex_destroy(&rtlock); 2089168404Spjd 2090262094Savg /* 2091262094Savg * If the object for the space map has changed then dirty 2092262094Savg * the top level so that we update the config. 2093262094Savg */ 2094262094Savg if (object != space_map_object(vd->vdev_dtl_sm)) { 2095262094Savg zfs_dbgmsg("txg %llu, spa %s, DTL old object %llu, " 2096262094Savg "new object %llu", txg, spa_name(spa), object, 2097262094Savg space_map_object(vd->vdev_dtl_sm)); 2098262094Savg vdev_config_dirty(vd->vdev_top); 2099262094Savg } 2100168404Spjd 2101168404Spjd dmu_tx_commit(tx); 2102262094Savg 2103262094Savg mutex_enter(&vd->vdev_dtl_lock); 2104262094Savg space_map_update(vd->vdev_dtl_sm); 2105262094Savg mutex_exit(&vd->vdev_dtl_lock); 2106168404Spjd} 2107168404Spjd 2108185029Spjd/* 2109209962Smm * Determine whether the specified vdev can be offlined/detached/removed 2110209962Smm * without losing data. 2111209962Smm */ 2112209962Smmboolean_t 2113209962Smmvdev_dtl_required(vdev_t *vd) 2114209962Smm{ 2115209962Smm spa_t *spa = vd->vdev_spa; 2116209962Smm vdev_t *tvd = vd->vdev_top; 2117209962Smm uint8_t cant_read = vd->vdev_cant_read; 2118209962Smm boolean_t required; 2119209962Smm 2120209962Smm ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 2121209962Smm 2122209962Smm if (vd == spa->spa_root_vdev || vd == tvd) 2123209962Smm return (B_TRUE); 2124209962Smm 2125209962Smm /* 2126209962Smm * Temporarily mark the device as unreadable, and then determine 2127209962Smm * whether this results in any DTL outages in the top-level vdev. 2128209962Smm * If not, we can safely offline/detach/remove the device. 2129209962Smm */ 2130209962Smm vd->vdev_cant_read = B_TRUE; 2131209962Smm vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 2132209962Smm required = !vdev_dtl_empty(tvd, DTL_OUTAGE); 2133209962Smm vd->vdev_cant_read = cant_read; 2134209962Smm vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 2135209962Smm 2136219089Spjd if (!required && zio_injection_enabled) 2137219089Spjd required = !!zio_handle_device_injection(vd, NULL, ECHILD); 2138219089Spjd 2139209962Smm return (required); 2140209962Smm} 2141209962Smm 2142209962Smm/* 2143185029Spjd * Determine if resilver is needed, and if so the txg range. 2144185029Spjd */ 2145185029Spjdboolean_t 2146185029Spjdvdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) 2147185029Spjd{ 2148185029Spjd boolean_t needed = B_FALSE; 2149185029Spjd uint64_t thismin = UINT64_MAX; 2150185029Spjd uint64_t thismax = 0; 2151185029Spjd 2152185029Spjd if (vd->vdev_children == 0) { 2153185029Spjd mutex_enter(&vd->vdev_dtl_lock); 2154262094Savg if (range_tree_space(vd->vdev_dtl[DTL_MISSING]) != 0 && 2155209962Smm vdev_writeable(vd)) { 2156185029Spjd 2157262086Savg thismin = vdev_dtl_min(vd); 2158262086Savg thismax = vdev_dtl_max(vd); 2159185029Spjd needed = B_TRUE; 2160185029Spjd } 2161185029Spjd mutex_exit(&vd->vdev_dtl_lock); 2162185029Spjd } else { 2163209962Smm for (int c = 0; c < vd->vdev_children; c++) { 2164185029Spjd vdev_t *cvd = vd->vdev_child[c]; 2165185029Spjd uint64_t cmin, cmax; 2166185029Spjd 2167185029Spjd if (vdev_resilver_needed(cvd, &cmin, &cmax)) { 2168185029Spjd thismin = MIN(thismin, cmin); 2169185029Spjd thismax = MAX(thismax, cmax); 2170185029Spjd needed = B_TRUE; 2171185029Spjd } 2172185029Spjd } 2173185029Spjd } 2174185029Spjd 2175185029Spjd if (needed && minp) { 2176185029Spjd *minp = thismin; 2177185029Spjd *maxp = thismax; 2178185029Spjd } 2179185029Spjd return (needed); 2180185029Spjd} 2181185029Spjd 2182168404Spjdvoid 2183168404Spjdvdev_load(vdev_t *vd) 2184168404Spjd{ 2185168404Spjd /* 2186168404Spjd * Recursively load all children. 2187168404Spjd */ 2188209962Smm for (int c = 0; c < vd->vdev_children; c++) 2189168404Spjd vdev_load(vd->vdev_child[c]); 2190168404Spjd 2191168404Spjd /* 2192168404Spjd * If this is a top-level vdev, initialize its metaslabs. 2193168404Spjd */ 2194219089Spjd if (vd == vd->vdev_top && !vd->vdev_ishole && 2195168404Spjd (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || 2196168404Spjd vdev_metaslab_init(vd, 0) != 0)) 2197168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 2198168404Spjd VDEV_AUX_CORRUPT_DATA); 2199168404Spjd 2200168404Spjd /* 2201168404Spjd * If this is a leaf vdev, load its DTL. 2202168404Spjd */ 2203168404Spjd if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) 2204168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 2205168404Spjd VDEV_AUX_CORRUPT_DATA); 2206168404Spjd} 2207168404Spjd 2208168404Spjd/* 2209185029Spjd * The special vdev case is used for hot spares and l2cache devices. Its 2210185029Spjd * sole purpose it to set the vdev state for the associated vdev. To do this, 2211185029Spjd * we make sure that we can open the underlying device, then try to read the 2212185029Spjd * label, and make sure that the label is sane and that it hasn't been 2213185029Spjd * repurposed to another pool. 2214168404Spjd */ 2215168404Spjdint 2216185029Spjdvdev_validate_aux(vdev_t *vd) 2217168404Spjd{ 2218168404Spjd nvlist_t *label; 2219168404Spjd uint64_t guid, version; 2220168404Spjd uint64_t state; 2221168404Spjd 2222185029Spjd if (!vdev_readable(vd)) 2223185029Spjd return (0); 2224185029Spjd 2225243674Smm if ((label = vdev_label_read_config(vd, -1ULL)) == NULL) { 2226168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 2227168404Spjd VDEV_AUX_CORRUPT_DATA); 2228168404Spjd return (-1); 2229168404Spjd } 2230168404Spjd 2231168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || 2232243674Smm !SPA_VERSION_IS_SUPPORTED(version) || 2233168404Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || 2234168404Spjd guid != vd->vdev_guid || 2235168404Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { 2236168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 2237168404Spjd VDEV_AUX_CORRUPT_DATA); 2238168404Spjd nvlist_free(label); 2239168404Spjd return (-1); 2240168404Spjd } 2241168404Spjd 2242168404Spjd /* 2243168404Spjd * We don't actually check the pool state here. If it's in fact in 2244168404Spjd * use by another pool, we update this fact on the fly when requested. 2245168404Spjd */ 2246168404Spjd nvlist_free(label); 2247168404Spjd return (0); 2248168404Spjd} 2249168404Spjd 2250168404Spjdvoid 2251219089Spjdvdev_remove(vdev_t *vd, uint64_t txg) 2252219089Spjd{ 2253219089Spjd spa_t *spa = vd->vdev_spa; 2254219089Spjd objset_t *mos = spa->spa_meta_objset; 2255219089Spjd dmu_tx_t *tx; 2256219089Spjd 2257219089Spjd tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg); 2258219089Spjd 2259219089Spjd if (vd->vdev_ms != NULL) { 2260219089Spjd for (int m = 0; m < vd->vdev_ms_count; m++) { 2261219089Spjd metaslab_t *msp = vd->vdev_ms[m]; 2262219089Spjd 2263262094Savg if (msp == NULL || msp->ms_sm == NULL) 2264219089Spjd continue; 2265219089Spjd 2266262094Savg mutex_enter(&msp->ms_lock); 2267262094Savg VERIFY0(space_map_allocated(msp->ms_sm)); 2268262094Savg space_map_free(msp->ms_sm, tx); 2269262094Savg space_map_close(msp->ms_sm); 2270262094Savg msp->ms_sm = NULL; 2271262094Savg mutex_exit(&msp->ms_lock); 2272219089Spjd } 2273219089Spjd } 2274219089Spjd 2275219089Spjd if (vd->vdev_ms_array) { 2276219089Spjd (void) dmu_object_free(mos, vd->vdev_ms_array, tx); 2277219089Spjd vd->vdev_ms_array = 0; 2278219089Spjd } 2279219089Spjd dmu_tx_commit(tx); 2280219089Spjd} 2281219089Spjd 2282219089Spjdvoid 2283168404Spjdvdev_sync_done(vdev_t *vd, uint64_t txg) 2284168404Spjd{ 2285168404Spjd metaslab_t *msp; 2286211931Smm boolean_t reassess = !txg_list_empty(&vd->vdev_ms_list, TXG_CLEAN(txg)); 2287168404Spjd 2288219089Spjd ASSERT(!vd->vdev_ishole); 2289219089Spjd 2290168404Spjd while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) 2291168404Spjd metaslab_sync_done(msp, txg); 2292211931Smm 2293211931Smm if (reassess) 2294211931Smm metaslab_sync_reassess(vd->vdev_mg); 2295168404Spjd} 2296168404Spjd 2297168404Spjdvoid 2298168404Spjdvdev_sync(vdev_t *vd, uint64_t txg) 2299168404Spjd{ 2300168404Spjd spa_t *spa = vd->vdev_spa; 2301168404Spjd vdev_t *lvd; 2302168404Spjd metaslab_t *msp; 2303168404Spjd dmu_tx_t *tx; 2304168404Spjd 2305219089Spjd ASSERT(!vd->vdev_ishole); 2306219089Spjd 2307168404Spjd if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { 2308168404Spjd ASSERT(vd == vd->vdev_top); 2309168404Spjd tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 2310168404Spjd vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, 2311168404Spjd DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); 2312168404Spjd ASSERT(vd->vdev_ms_array != 0); 2313168404Spjd vdev_config_dirty(vd); 2314168404Spjd dmu_tx_commit(tx); 2315168404Spjd } 2316168404Spjd 2317219089Spjd /* 2318219089Spjd * Remove the metadata associated with this vdev once it's empty. 2319219089Spjd */ 2320219089Spjd if (vd->vdev_stat.vs_alloc == 0 && vd->vdev_removing) 2321219089Spjd vdev_remove(vd, txg); 2322219089Spjd 2323168404Spjd while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { 2324168404Spjd metaslab_sync(msp, txg); 2325168404Spjd (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); 2326168404Spjd } 2327168404Spjd 2328168404Spjd while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) 2329168404Spjd vdev_dtl_sync(lvd, txg); 2330168404Spjd 2331168404Spjd (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); 2332168404Spjd} 2333168404Spjd 2334168404Spjduint64_t 2335168404Spjdvdev_psize_to_asize(vdev_t *vd, uint64_t psize) 2336168404Spjd{ 2337168404Spjd return (vd->vdev_ops->vdev_op_asize(vd, psize)); 2338168404Spjd} 2339168404Spjd 2340185029Spjd/* 2341185029Spjd * Mark the given vdev faulted. A faulted vdev behaves as if the device could 2342185029Spjd * not be opened, and no I/O is attempted. 2343185029Spjd */ 2344185029Spjdint 2345219089Spjdvdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux) 2346168404Spjd{ 2347219089Spjd vdev_t *vd, *tvd; 2348168404Spjd 2349219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2350185029Spjd 2351185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2352185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2353185029Spjd 2354185029Spjd if (!vd->vdev_ops->vdev_op_leaf) 2355185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2356185029Spjd 2357219089Spjd tvd = vd->vdev_top; 2358219089Spjd 2359185029Spjd /* 2360219089Spjd * We don't directly use the aux state here, but if we do a 2361219089Spjd * vdev_reopen(), we need this value to be present to remember why we 2362219089Spjd * were faulted. 2363219089Spjd */ 2364219089Spjd vd->vdev_label_aux = aux; 2365219089Spjd 2366219089Spjd /* 2367185029Spjd * Faulted state takes precedence over degraded. 2368185029Spjd */ 2369219089Spjd vd->vdev_delayed_close = B_FALSE; 2370185029Spjd vd->vdev_faulted = 1ULL; 2371185029Spjd vd->vdev_degraded = 0ULL; 2372219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, aux); 2373185029Spjd 2374185029Spjd /* 2375219089Spjd * If this device has the only valid copy of the data, then 2376219089Spjd * back off and simply mark the vdev as degraded instead. 2377185029Spjd */ 2378219089Spjd if (!tvd->vdev_islog && vd->vdev_aux == NULL && vdev_dtl_required(vd)) { 2379185029Spjd vd->vdev_degraded = 1ULL; 2380185029Spjd vd->vdev_faulted = 0ULL; 2381185029Spjd 2382185029Spjd /* 2383185029Spjd * If we reopen the device and it's not dead, only then do we 2384185029Spjd * mark it degraded. 2385185029Spjd */ 2386219089Spjd vdev_reopen(tvd); 2387185029Spjd 2388219089Spjd if (vdev_readable(vd)) 2389219089Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, aux); 2390185029Spjd } 2391185029Spjd 2392185029Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2393168404Spjd} 2394168404Spjd 2395185029Spjd/* 2396185029Spjd * Mark the given vdev degraded. A degraded vdev is purely an indication to the 2397185029Spjd * user that something is wrong. The vdev continues to operate as normal as far 2398185029Spjd * as I/O is concerned. 2399185029Spjd */ 2400185029Spjdint 2401219089Spjdvdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux) 2402168404Spjd{ 2403185029Spjd vdev_t *vd; 2404168404Spjd 2405219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2406168404Spjd 2407185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2408185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2409168404Spjd 2410185029Spjd if (!vd->vdev_ops->vdev_op_leaf) 2411185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2412185029Spjd 2413185029Spjd /* 2414185029Spjd * If the vdev is already faulted, then don't do anything. 2415185029Spjd */ 2416185029Spjd if (vd->vdev_faulted || vd->vdev_degraded) 2417185029Spjd return (spa_vdev_state_exit(spa, NULL, 0)); 2418185029Spjd 2419185029Spjd vd->vdev_degraded = 1ULL; 2420185029Spjd if (!vdev_is_dead(vd)) 2421185029Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, 2422219089Spjd aux); 2423185029Spjd 2424185029Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2425168404Spjd} 2426168404Spjd 2427185029Spjd/* 2428252751Sdelphij * Online the given vdev. 2429252751Sdelphij * 2430252751Sdelphij * If 'ZFS_ONLINE_UNSPARE' is set, it implies two things. First, any attached 2431252751Sdelphij * spare device should be detached when the device finishes resilvering. 2432252751Sdelphij * Second, the online should be treated like a 'test' online case, so no FMA 2433252751Sdelphij * events are generated if the device fails to open. 2434185029Spjd */ 2435168404Spjdint 2436185029Spjdvdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) 2437168404Spjd{ 2438219089Spjd vdev_t *vd, *tvd, *pvd, *rvd = spa->spa_root_vdev; 2439168404Spjd 2440219089Spjd spa_vdev_state_enter(spa, SCL_NONE); 2441168404Spjd 2442185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2443185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2444168404Spjd 2445168404Spjd if (!vd->vdev_ops->vdev_op_leaf) 2446185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2447168404Spjd 2448219089Spjd tvd = vd->vdev_top; 2449168404Spjd vd->vdev_offline = B_FALSE; 2450168404Spjd vd->vdev_tmpoffline = B_FALSE; 2451185029Spjd vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); 2452185029Spjd vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); 2453219089Spjd 2454219089Spjd /* XXX - L2ARC 1.0 does not support expansion */ 2455219089Spjd if (!vd->vdev_aux) { 2456219089Spjd for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2457219089Spjd pvd->vdev_expanding = !!(flags & ZFS_ONLINE_EXPAND); 2458219089Spjd } 2459219089Spjd 2460219089Spjd vdev_reopen(tvd); 2461185029Spjd vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; 2462168404Spjd 2463219089Spjd if (!vd->vdev_aux) { 2464219089Spjd for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2465219089Spjd pvd->vdev_expanding = B_FALSE; 2466219089Spjd } 2467219089Spjd 2468185029Spjd if (newstate) 2469185029Spjd *newstate = vd->vdev_state; 2470185029Spjd if ((flags & ZFS_ONLINE_UNSPARE) && 2471185029Spjd !vdev_is_dead(vd) && vd->vdev_parent && 2472185029Spjd vd->vdev_parent->vdev_ops == &vdev_spare_ops && 2473185029Spjd vd->vdev_parent->vdev_child[0] == vd) 2474185029Spjd vd->vdev_unspare = B_TRUE; 2475168404Spjd 2476219089Spjd if ((flags & ZFS_ONLINE_EXPAND) || spa->spa_autoexpand) { 2477219089Spjd 2478219089Spjd /* XXX - L2ARC 1.0 does not support expansion */ 2479219089Spjd if (vd->vdev_aux) 2480219089Spjd return (spa_vdev_state_exit(spa, vd, ENOTSUP)); 2481219089Spjd spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2482219089Spjd } 2483209962Smm return (spa_vdev_state_exit(spa, vd, 0)); 2484168404Spjd} 2485168404Spjd 2486219089Spjdstatic int 2487219089Spjdvdev_offline_locked(spa_t *spa, uint64_t guid, uint64_t flags) 2488168404Spjd{ 2489213197Smm vdev_t *vd, *tvd; 2490219089Spjd int error = 0; 2491219089Spjd uint64_t generation; 2492219089Spjd metaslab_group_t *mg; 2493168404Spjd 2494219089Spjdtop: 2495219089Spjd spa_vdev_state_enter(spa, SCL_ALLOC); 2496168404Spjd 2497185029Spjd if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 2498185029Spjd return (spa_vdev_state_exit(spa, NULL, ENODEV)); 2499168404Spjd 2500168404Spjd if (!vd->vdev_ops->vdev_op_leaf) 2501185029Spjd return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 2502168404Spjd 2503213197Smm tvd = vd->vdev_top; 2504219089Spjd mg = tvd->vdev_mg; 2505219089Spjd generation = spa->spa_config_generation + 1; 2506213197Smm 2507168404Spjd /* 2508168404Spjd * If the device isn't already offline, try to offline it. 2509168404Spjd */ 2510168404Spjd if (!vd->vdev_offline) { 2511168404Spjd /* 2512209962Smm * If this device has the only valid copy of some data, 2513213197Smm * don't allow it to be offlined. Log devices are always 2514213197Smm * expendable. 2515168404Spjd */ 2516213197Smm if (!tvd->vdev_islog && vd->vdev_aux == NULL && 2517213197Smm vdev_dtl_required(vd)) 2518185029Spjd return (spa_vdev_state_exit(spa, NULL, EBUSY)); 2519168404Spjd 2520168404Spjd /* 2521219089Spjd * If the top-level is a slog and it has had allocations 2522219089Spjd * then proceed. We check that the vdev's metaslab group 2523219089Spjd * is not NULL since it's possible that we may have just 2524219089Spjd * added this vdev but not yet initialized its metaslabs. 2525219089Spjd */ 2526219089Spjd if (tvd->vdev_islog && mg != NULL) { 2527219089Spjd /* 2528219089Spjd * Prevent any future allocations. 2529219089Spjd */ 2530219089Spjd metaslab_group_passivate(mg); 2531219089Spjd (void) spa_vdev_state_exit(spa, vd, 0); 2532219089Spjd 2533219089Spjd error = spa_offline_log(spa); 2534219089Spjd 2535219089Spjd spa_vdev_state_enter(spa, SCL_ALLOC); 2536219089Spjd 2537219089Spjd /* 2538219089Spjd * Check to see if the config has changed. 2539219089Spjd */ 2540219089Spjd if (error || generation != spa->spa_config_generation) { 2541219089Spjd metaslab_group_activate(mg); 2542219089Spjd if (error) 2543219089Spjd return (spa_vdev_state_exit(spa, 2544219089Spjd vd, error)); 2545219089Spjd (void) spa_vdev_state_exit(spa, vd, 0); 2546219089Spjd goto top; 2547219089Spjd } 2548243674Smm ASSERT0(tvd->vdev_stat.vs_alloc); 2549219089Spjd } 2550219089Spjd 2551219089Spjd /* 2552168404Spjd * Offline this device and reopen its top-level vdev. 2553213197Smm * If the top-level vdev is a log device then just offline 2554213197Smm * it. Otherwise, if this action results in the top-level 2555213197Smm * vdev becoming unusable, undo it and fail the request. 2556168404Spjd */ 2557168404Spjd vd->vdev_offline = B_TRUE; 2558213197Smm vdev_reopen(tvd); 2559213197Smm 2560213197Smm if (!tvd->vdev_islog && vd->vdev_aux == NULL && 2561213197Smm vdev_is_dead(tvd)) { 2562168404Spjd vd->vdev_offline = B_FALSE; 2563213197Smm vdev_reopen(tvd); 2564185029Spjd return (spa_vdev_state_exit(spa, NULL, EBUSY)); 2565168404Spjd } 2566219089Spjd 2567219089Spjd /* 2568219089Spjd * Add the device back into the metaslab rotor so that 2569219089Spjd * once we online the device it's open for business. 2570219089Spjd */ 2571219089Spjd if (tvd->vdev_islog && mg != NULL) 2572219089Spjd metaslab_group_activate(mg); 2573168404Spjd } 2574168404Spjd 2575185029Spjd vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); 2576168404Spjd 2577219089Spjd return (spa_vdev_state_exit(spa, vd, 0)); 2578219089Spjd} 2579213197Smm 2580219089Spjdint 2581219089Spjdvdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) 2582219089Spjd{ 2583219089Spjd int error; 2584213197Smm 2585219089Spjd mutex_enter(&spa->spa_vdev_top_lock); 2586219089Spjd error = vdev_offline_locked(spa, guid, flags); 2587219089Spjd mutex_exit(&spa->spa_vdev_top_lock); 2588219089Spjd 2589219089Spjd return (error); 2590168404Spjd} 2591168404Spjd 2592168404Spjd/* 2593168404Spjd * Clear the error counts associated with this vdev. Unlike vdev_online() and 2594168404Spjd * vdev_offline(), we assume the spa config is locked. We also clear all 2595168404Spjd * children. If 'vd' is NULL, then the user wants to clear all vdevs. 2596168404Spjd */ 2597168404Spjdvoid 2598168404Spjdvdev_clear(spa_t *spa, vdev_t *vd) 2599168404Spjd{ 2600185029Spjd vdev_t *rvd = spa->spa_root_vdev; 2601168404Spjd 2602185029Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 2603185029Spjd 2604168404Spjd if (vd == NULL) 2605185029Spjd vd = rvd; 2606168404Spjd 2607168404Spjd vd->vdev_stat.vs_read_errors = 0; 2608168404Spjd vd->vdev_stat.vs_write_errors = 0; 2609168404Spjd vd->vdev_stat.vs_checksum_errors = 0; 2610168404Spjd 2611185029Spjd for (int c = 0; c < vd->vdev_children; c++) 2612168404Spjd vdev_clear(spa, vd->vdev_child[c]); 2613185029Spjd 2614255539Smav if (vd == rvd) { 2615255539Smav for (int c = 0; c < spa->spa_l2cache.sav_count; c++) 2616255539Smav vdev_clear(spa, spa->spa_l2cache.sav_vdevs[c]); 2617255539Smav 2618255539Smav for (int c = 0; c < spa->spa_spares.sav_count; c++) 2619255539Smav vdev_clear(spa, spa->spa_spares.sav_vdevs[c]); 2620255539Smav } 2621255539Smav 2622185029Spjd /* 2623185029Spjd * If we're in the FAULTED state or have experienced failed I/O, then 2624185029Spjd * clear the persistent state and attempt to reopen the device. We 2625185029Spjd * also mark the vdev config dirty, so that the new faulted state is 2626185029Spjd * written out to disk. 2627185029Spjd */ 2628185029Spjd if (vd->vdev_faulted || vd->vdev_degraded || 2629185029Spjd !vdev_readable(vd) || !vdev_writeable(vd)) { 2630185029Spjd 2631219089Spjd /* 2632219089Spjd * When reopening in reponse to a clear event, it may be due to 2633219089Spjd * a fmadm repair request. In this case, if the device is 2634219089Spjd * still broken, we want to still post the ereport again. 2635219089Spjd */ 2636219089Spjd vd->vdev_forcefault = B_TRUE; 2637219089Spjd 2638219089Spjd vd->vdev_faulted = vd->vdev_degraded = 0ULL; 2639185029Spjd vd->vdev_cant_read = B_FALSE; 2640185029Spjd vd->vdev_cant_write = B_FALSE; 2641185029Spjd 2642219089Spjd vdev_reopen(vd == rvd ? rvd : vd->vdev_top); 2643185029Spjd 2644219089Spjd vd->vdev_forcefault = B_FALSE; 2645219089Spjd 2646219089Spjd if (vd != rvd && vdev_writeable(vd->vdev_top)) 2647185029Spjd vdev_state_dirty(vd->vdev_top); 2648185029Spjd 2649185029Spjd if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) 2650185029Spjd spa_async_request(spa, SPA_ASYNC_RESILVER); 2651185029Spjd 2652185029Spjd spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR); 2653185029Spjd } 2654219089Spjd 2655219089Spjd /* 2656219089Spjd * When clearing a FMA-diagnosed fault, we always want to 2657219089Spjd * unspare the device, as we assume that the original spare was 2658219089Spjd * done in response to the FMA fault. 2659219089Spjd */ 2660219089Spjd if (!vdev_is_dead(vd) && vd->vdev_parent != NULL && 2661219089Spjd vd->vdev_parent->vdev_ops == &vdev_spare_ops && 2662219089Spjd vd->vdev_parent->vdev_child[0] == vd) 2663219089Spjd vd->vdev_unspare = B_TRUE; 2664168404Spjd} 2665168404Spjd 2666185029Spjdboolean_t 2667168404Spjdvdev_is_dead(vdev_t *vd) 2668168404Spjd{ 2669219089Spjd /* 2670219089Spjd * Holes and missing devices are always considered "dead". 2671219089Spjd * This simplifies the code since we don't have to check for 2672219089Spjd * these types of devices in the various code paths. 2673219089Spjd * Instead we rely on the fact that we skip over dead devices 2674219089Spjd * before issuing I/O to them. 2675219089Spjd */ 2676219089Spjd return (vd->vdev_state < VDEV_STATE_DEGRADED || vd->vdev_ishole || 2677219089Spjd vd->vdev_ops == &vdev_missing_ops); 2678168404Spjd} 2679168404Spjd 2680185029Spjdboolean_t 2681185029Spjdvdev_readable(vdev_t *vd) 2682168404Spjd{ 2683185029Spjd return (!vdev_is_dead(vd) && !vd->vdev_cant_read); 2684185029Spjd} 2685168404Spjd 2686185029Spjdboolean_t 2687185029Spjdvdev_writeable(vdev_t *vd) 2688185029Spjd{ 2689185029Spjd return (!vdev_is_dead(vd) && !vd->vdev_cant_write); 2690185029Spjd} 2691168404Spjd 2692185029Spjdboolean_t 2693208370Smmvdev_allocatable(vdev_t *vd) 2694208370Smm{ 2695209962Smm uint64_t state = vd->vdev_state; 2696209962Smm 2697208370Smm /* 2698209962Smm * We currently allow allocations from vdevs which may be in the 2699208370Smm * process of reopening (i.e. VDEV_STATE_CLOSED). If the device 2700208370Smm * fails to reopen then we'll catch it later when we're holding 2701209962Smm * the proper locks. Note that we have to get the vdev state 2702209962Smm * in a local variable because although it changes atomically, 2703209962Smm * we're asking two separate questions about it. 2704208370Smm */ 2705209962Smm return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) && 2706219089Spjd !vd->vdev_cant_write && !vd->vdev_ishole); 2707208370Smm} 2708208370Smm 2709208370Smmboolean_t 2710185029Spjdvdev_accessible(vdev_t *vd, zio_t *zio) 2711185029Spjd{ 2712185029Spjd ASSERT(zio->io_vd == vd); 2713168404Spjd 2714185029Spjd if (vdev_is_dead(vd) || vd->vdev_remove_wanted) 2715185029Spjd return (B_FALSE); 2716168404Spjd 2717185029Spjd if (zio->io_type == ZIO_TYPE_READ) 2718185029Spjd return (!vd->vdev_cant_read); 2719168404Spjd 2720185029Spjd if (zio->io_type == ZIO_TYPE_WRITE) 2721185029Spjd return (!vd->vdev_cant_write); 2722168404Spjd 2723185029Spjd return (B_TRUE); 2724168404Spjd} 2725168404Spjd 2726168404Spjd/* 2727168404Spjd * Get statistics for the given vdev. 2728168404Spjd */ 2729168404Spjdvoid 2730168404Spjdvdev_get_stats(vdev_t *vd, vdev_stat_t *vs) 2731168404Spjd{ 2732168404Spjd vdev_t *rvd = vd->vdev_spa->spa_root_vdev; 2733168404Spjd 2734168404Spjd mutex_enter(&vd->vdev_stat_lock); 2735168404Spjd bcopy(&vd->vdev_stat, vs, sizeof (*vs)); 2736168404Spjd vs->vs_timestamp = gethrtime() - vs->vs_timestamp; 2737168404Spjd vs->vs_state = vd->vdev_state; 2738219089Spjd vs->vs_rsize = vdev_get_min_asize(vd); 2739219089Spjd if (vd->vdev_ops->vdev_op_leaf) 2740219089Spjd vs->vs_rsize += VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE; 2741236839Smm vs->vs_esize = vd->vdev_max_asize - vd->vdev_asize; 2742262081Savg vs->vs_configured_ashift = vd->vdev_top != NULL 2743262081Savg ? vd->vdev_top->vdev_ashift : vd->vdev_ashift; 2744262081Savg vs->vs_logical_ashift = vd->vdev_logical_ashift; 2745262081Savg vs->vs_physical_ashift = vd->vdev_physical_ashift; 2746168404Spjd mutex_exit(&vd->vdev_stat_lock); 2747168404Spjd 2748168404Spjd /* 2749168404Spjd * If we're getting stats on the root vdev, aggregate the I/O counts 2750168404Spjd * over all top-level vdevs (i.e. the direct children of the root). 2751168404Spjd */ 2752168404Spjd if (vd == rvd) { 2753185029Spjd for (int c = 0; c < rvd->vdev_children; c++) { 2754168404Spjd vdev_t *cvd = rvd->vdev_child[c]; 2755168404Spjd vdev_stat_t *cvs = &cvd->vdev_stat; 2756168404Spjd 2757168404Spjd mutex_enter(&vd->vdev_stat_lock); 2758185029Spjd for (int t = 0; t < ZIO_TYPES; t++) { 2759168404Spjd vs->vs_ops[t] += cvs->vs_ops[t]; 2760168404Spjd vs->vs_bytes[t] += cvs->vs_bytes[t]; 2761168404Spjd } 2762219089Spjd cvs->vs_scan_removing = cvd->vdev_removing; 2763168404Spjd mutex_exit(&vd->vdev_stat_lock); 2764168404Spjd } 2765168404Spjd } 2766168404Spjd} 2767168404Spjd 2768168404Spjdvoid 2769185029Spjdvdev_clear_stats(vdev_t *vd) 2770168404Spjd{ 2771185029Spjd mutex_enter(&vd->vdev_stat_lock); 2772185029Spjd vd->vdev_stat.vs_space = 0; 2773185029Spjd vd->vdev_stat.vs_dspace = 0; 2774185029Spjd vd->vdev_stat.vs_alloc = 0; 2775185029Spjd mutex_exit(&vd->vdev_stat_lock); 2776185029Spjd} 2777185029Spjd 2778185029Spjdvoid 2779219089Spjdvdev_scan_stat_init(vdev_t *vd) 2780219089Spjd{ 2781219089Spjd vdev_stat_t *vs = &vd->vdev_stat; 2782219089Spjd 2783219089Spjd for (int c = 0; c < vd->vdev_children; c++) 2784219089Spjd vdev_scan_stat_init(vd->vdev_child[c]); 2785219089Spjd 2786219089Spjd mutex_enter(&vd->vdev_stat_lock); 2787219089Spjd vs->vs_scan_processed = 0; 2788219089Spjd mutex_exit(&vd->vdev_stat_lock); 2789219089Spjd} 2790219089Spjd 2791219089Spjdvoid 2792185029Spjdvdev_stat_update(zio_t *zio, uint64_t psize) 2793185029Spjd{ 2794209962Smm spa_t *spa = zio->io_spa; 2795209962Smm vdev_t *rvd = spa->spa_root_vdev; 2796185029Spjd vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; 2797168404Spjd vdev_t *pvd; 2798168404Spjd uint64_t txg = zio->io_txg; 2799168404Spjd vdev_stat_t *vs = &vd->vdev_stat; 2800168404Spjd zio_type_t type = zio->io_type; 2801168404Spjd int flags = zio->io_flags; 2802168404Spjd 2803185029Spjd /* 2804185029Spjd * If this i/o is a gang leader, it didn't do any actual work. 2805185029Spjd */ 2806185029Spjd if (zio->io_gang_tree) 2807185029Spjd return; 2808185029Spjd 2809168404Spjd if (zio->io_error == 0) { 2810185029Spjd /* 2811185029Spjd * If this is a root i/o, don't count it -- we've already 2812185029Spjd * counted the top-level vdevs, and vdev_get_stats() will 2813185029Spjd * aggregate them when asked. This reduces contention on 2814185029Spjd * the root vdev_stat_lock and implicitly handles blocks 2815185029Spjd * that compress away to holes, for which there is no i/o. 2816185029Spjd * (Holes never create vdev children, so all the counters 2817185029Spjd * remain zero, which is what we want.) 2818185029Spjd * 2819185029Spjd * Note: this only applies to successful i/o (io_error == 0) 2820185029Spjd * because unlike i/o counts, errors are not additive. 2821185029Spjd * When reading a ditto block, for example, failure of 2822185029Spjd * one top-level vdev does not imply a root-level error. 2823185029Spjd */ 2824185029Spjd if (vd == rvd) 2825185029Spjd return; 2826185029Spjd 2827185029Spjd ASSERT(vd == zio->io_vd); 2828209962Smm 2829209962Smm if (flags & ZIO_FLAG_IO_BYPASS) 2830209962Smm return; 2831209962Smm 2832209962Smm mutex_enter(&vd->vdev_stat_lock); 2833209962Smm 2834185029Spjd if (flags & ZIO_FLAG_IO_REPAIR) { 2835219089Spjd if (flags & ZIO_FLAG_SCAN_THREAD) { 2836219089Spjd dsl_scan_phys_t *scn_phys = 2837219089Spjd &spa->spa_dsl_pool->dp_scan->scn_phys; 2838219089Spjd uint64_t *processed = &scn_phys->scn_processed; 2839219089Spjd 2840219089Spjd /* XXX cleanup? */ 2841219089Spjd if (vd->vdev_ops->vdev_op_leaf) 2842219089Spjd atomic_add_64(processed, psize); 2843219089Spjd vs->vs_scan_processed += psize; 2844219089Spjd } 2845219089Spjd 2846209962Smm if (flags & ZIO_FLAG_SELF_HEAL) 2847185029Spjd vs->vs_self_healed += psize; 2848168404Spjd } 2849209962Smm 2850209962Smm vs->vs_ops[type]++; 2851209962Smm vs->vs_bytes[type] += psize; 2852209962Smm 2853209962Smm mutex_exit(&vd->vdev_stat_lock); 2854168404Spjd return; 2855168404Spjd } 2856168404Spjd 2857168404Spjd if (flags & ZIO_FLAG_SPECULATIVE) 2858168404Spjd return; 2859168404Spjd 2860213198Smm /* 2861213198Smm * If this is an I/O error that is going to be retried, then ignore the 2862213198Smm * error. Otherwise, the user may interpret B_FAILFAST I/O errors as 2863213198Smm * hard errors, when in reality they can happen for any number of 2864213198Smm * innocuous reasons (bus resets, MPxIO link failure, etc). 2865213198Smm */ 2866213198Smm if (zio->io_error == EIO && 2867213198Smm !(zio->io_flags & ZIO_FLAG_IO_RETRY)) 2868213198Smm return; 2869213198Smm 2870219089Spjd /* 2871219089Spjd * Intent logs writes won't propagate their error to the root 2872219089Spjd * I/O so don't mark these types of failures as pool-level 2873219089Spjd * errors. 2874219089Spjd */ 2875219089Spjd if (zio->io_vd == NULL && (zio->io_flags & ZIO_FLAG_DONT_PROPAGATE)) 2876219089Spjd return; 2877219089Spjd 2878185029Spjd mutex_enter(&vd->vdev_stat_lock); 2879209962Smm if (type == ZIO_TYPE_READ && !vdev_is_dead(vd)) { 2880185029Spjd if (zio->io_error == ECKSUM) 2881185029Spjd vs->vs_checksum_errors++; 2882185029Spjd else 2883185029Spjd vs->vs_read_errors++; 2884168404Spjd } 2885209962Smm if (type == ZIO_TYPE_WRITE && !vdev_is_dead(vd)) 2886185029Spjd vs->vs_write_errors++; 2887185029Spjd mutex_exit(&vd->vdev_stat_lock); 2888168404Spjd 2889209962Smm if (type == ZIO_TYPE_WRITE && txg != 0 && 2890209962Smm (!(flags & ZIO_FLAG_IO_REPAIR) || 2891219089Spjd (flags & ZIO_FLAG_SCAN_THREAD) || 2892219089Spjd spa->spa_claiming)) { 2893209962Smm /* 2894219089Spjd * This is either a normal write (not a repair), or it's 2895219089Spjd * a repair induced by the scrub thread, or it's a repair 2896219089Spjd * made by zil_claim() during spa_load() in the first txg. 2897219089Spjd * In the normal case, we commit the DTL change in the same 2898219089Spjd * txg as the block was born. In the scrub-induced repair 2899219089Spjd * case, we know that scrubs run in first-pass syncing context, 2900219089Spjd * so we commit the DTL change in spa_syncing_txg(spa). 2901219089Spjd * In the zil_claim() case, we commit in spa_first_txg(spa). 2902209962Smm * 2903209962Smm * We currently do not make DTL entries for failed spontaneous 2904209962Smm * self-healing writes triggered by normal (non-scrubbing) 2905209962Smm * reads, because we have no transactional context in which to 2906209962Smm * do so -- and it's not clear that it'd be desirable anyway. 2907209962Smm */ 2908209962Smm if (vd->vdev_ops->vdev_op_leaf) { 2909209962Smm uint64_t commit_txg = txg; 2910219089Spjd if (flags & ZIO_FLAG_SCAN_THREAD) { 2911209962Smm ASSERT(flags & ZIO_FLAG_IO_REPAIR); 2912209962Smm ASSERT(spa_sync_pass(spa) == 1); 2913209962Smm vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1); 2914219089Spjd commit_txg = spa_syncing_txg(spa); 2915219089Spjd } else if (spa->spa_claiming) { 2916219089Spjd ASSERT(flags & ZIO_FLAG_IO_REPAIR); 2917219089Spjd commit_txg = spa_first_txg(spa); 2918209962Smm } 2919219089Spjd ASSERT(commit_txg >= spa_syncing_txg(spa)); 2920209962Smm if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1)) 2921168404Spjd return; 2922209962Smm for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2923209962Smm vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1); 2924209962Smm vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg); 2925168404Spjd } 2926209962Smm if (vd != rvd) 2927209962Smm vdev_dtl_dirty(vd, DTL_MISSING, txg, 1); 2928168404Spjd } 2929168404Spjd} 2930168404Spjd 2931168404Spjd/* 2932219089Spjd * Update the in-core space usage stats for this vdev, its metaslab class, 2933219089Spjd * and the root vdev. 2934168404Spjd */ 2935168404Spjdvoid 2936219089Spjdvdev_space_update(vdev_t *vd, int64_t alloc_delta, int64_t defer_delta, 2937219089Spjd int64_t space_delta) 2938168404Spjd{ 2939168404Spjd int64_t dspace_delta = space_delta; 2940185029Spjd spa_t *spa = vd->vdev_spa; 2941185029Spjd vdev_t *rvd = spa->spa_root_vdev; 2942219089Spjd metaslab_group_t *mg = vd->vdev_mg; 2943219089Spjd metaslab_class_t *mc = mg ? mg->mg_class : NULL; 2944168404Spjd 2945185029Spjd ASSERT(vd == vd->vdev_top); 2946168404Spjd 2947185029Spjd /* 2948185029Spjd * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion 2949185029Spjd * factor. We must calculate this here and not at the root vdev 2950185029Spjd * because the root vdev's psize-to-asize is simply the max of its 2951185029Spjd * childrens', thus not accurate enough for us. 2952185029Spjd */ 2953185029Spjd ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); 2954213197Smm ASSERT(vd->vdev_deflate_ratio != 0 || vd->vdev_isl2cache); 2955185029Spjd dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * 2956185029Spjd vd->vdev_deflate_ratio; 2957185029Spjd 2958185029Spjd mutex_enter(&vd->vdev_stat_lock); 2959219089Spjd vd->vdev_stat.vs_alloc += alloc_delta; 2960185029Spjd vd->vdev_stat.vs_space += space_delta; 2961185029Spjd vd->vdev_stat.vs_dspace += dspace_delta; 2962185029Spjd mutex_exit(&vd->vdev_stat_lock); 2963185029Spjd 2964219089Spjd if (mc == spa_normal_class(spa)) { 2965185029Spjd mutex_enter(&rvd->vdev_stat_lock); 2966219089Spjd rvd->vdev_stat.vs_alloc += alloc_delta; 2967185029Spjd rvd->vdev_stat.vs_space += space_delta; 2968185029Spjd rvd->vdev_stat.vs_dspace += dspace_delta; 2969185029Spjd mutex_exit(&rvd->vdev_stat_lock); 2970185029Spjd } 2971219089Spjd 2972219089Spjd if (mc != NULL) { 2973219089Spjd ASSERT(rvd == vd->vdev_parent); 2974219089Spjd ASSERT(vd->vdev_ms_count != 0); 2975219089Spjd 2976219089Spjd metaslab_class_space_update(mc, 2977219089Spjd alloc_delta, defer_delta, space_delta, dspace_delta); 2978219089Spjd } 2979168404Spjd} 2980168404Spjd 2981168404Spjd/* 2982168404Spjd * Mark a top-level vdev's config as dirty, placing it on the dirty list 2983168404Spjd * so that it will be written out next time the vdev configuration is synced. 2984168404Spjd * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. 2985168404Spjd */ 2986168404Spjdvoid 2987168404Spjdvdev_config_dirty(vdev_t *vd) 2988168404Spjd{ 2989168404Spjd spa_t *spa = vd->vdev_spa; 2990168404Spjd vdev_t *rvd = spa->spa_root_vdev; 2991168404Spjd int c; 2992168404Spjd 2993219089Spjd ASSERT(spa_writeable(spa)); 2994219089Spjd 2995168404Spjd /* 2996209962Smm * If this is an aux vdev (as with l2cache and spare devices), then we 2997209962Smm * update the vdev config manually and set the sync flag. 2998185029Spjd */ 2999185029Spjd if (vd->vdev_aux != NULL) { 3000185029Spjd spa_aux_vdev_t *sav = vd->vdev_aux; 3001185029Spjd nvlist_t **aux; 3002185029Spjd uint_t naux; 3003185029Spjd 3004185029Spjd for (c = 0; c < sav->sav_count; c++) { 3005185029Spjd if (sav->sav_vdevs[c] == vd) 3006185029Spjd break; 3007185029Spjd } 3008185029Spjd 3009185029Spjd if (c == sav->sav_count) { 3010185029Spjd /* 3011185029Spjd * We're being removed. There's nothing more to do. 3012185029Spjd */ 3013185029Spjd ASSERT(sav->sav_sync == B_TRUE); 3014185029Spjd return; 3015185029Spjd } 3016185029Spjd 3017185029Spjd sav->sav_sync = B_TRUE; 3018185029Spjd 3019209962Smm if (nvlist_lookup_nvlist_array(sav->sav_config, 3020209962Smm ZPOOL_CONFIG_L2CACHE, &aux, &naux) != 0) { 3021209962Smm VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 3022209962Smm ZPOOL_CONFIG_SPARES, &aux, &naux) == 0); 3023209962Smm } 3024185029Spjd 3025185029Spjd ASSERT(c < naux); 3026185029Spjd 3027185029Spjd /* 3028185029Spjd * Setting the nvlist in the middle if the array is a little 3029185029Spjd * sketchy, but it will work. 3030185029Spjd */ 3031185029Spjd nvlist_free(aux[c]); 3032219089Spjd aux[c] = vdev_config_generate(spa, vd, B_TRUE, 0); 3033185029Spjd 3034185029Spjd return; 3035185029Spjd } 3036185029Spjd 3037185029Spjd /* 3038185029Spjd * The dirty list is protected by the SCL_CONFIG lock. The caller 3039185029Spjd * must either hold SCL_CONFIG as writer, or must be the sync thread 3040185029Spjd * (which holds SCL_CONFIG as reader). There's only one sync thread, 3041168404Spjd * so this is sufficient to ensure mutual exclusion. 3042168404Spjd */ 3043185029Spjd ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 3044185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 3045185029Spjd spa_config_held(spa, SCL_CONFIG, RW_READER))); 3046168404Spjd 3047168404Spjd if (vd == rvd) { 3048168404Spjd for (c = 0; c < rvd->vdev_children; c++) 3049168404Spjd vdev_config_dirty(rvd->vdev_child[c]); 3050168404Spjd } else { 3051168404Spjd ASSERT(vd == vd->vdev_top); 3052168404Spjd 3053219089Spjd if (!list_link_active(&vd->vdev_config_dirty_node) && 3054219089Spjd !vd->vdev_ishole) 3055185029Spjd list_insert_head(&spa->spa_config_dirty_list, vd); 3056168404Spjd } 3057168404Spjd} 3058168404Spjd 3059168404Spjdvoid 3060168404Spjdvdev_config_clean(vdev_t *vd) 3061168404Spjd{ 3062168404Spjd spa_t *spa = vd->vdev_spa; 3063168404Spjd 3064185029Spjd ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 3065185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 3066185029Spjd spa_config_held(spa, SCL_CONFIG, RW_READER))); 3067168404Spjd 3068185029Spjd ASSERT(list_link_active(&vd->vdev_config_dirty_node)); 3069185029Spjd list_remove(&spa->spa_config_dirty_list, vd); 3070168404Spjd} 3071168404Spjd 3072185029Spjd/* 3073185029Spjd * Mark a top-level vdev's state as dirty, so that the next pass of 3074185029Spjd * spa_sync() can convert this into vdev_config_dirty(). We distinguish 3075185029Spjd * the state changes from larger config changes because they require 3076185029Spjd * much less locking, and are often needed for administrative actions. 3077185029Spjd */ 3078168404Spjdvoid 3079185029Spjdvdev_state_dirty(vdev_t *vd) 3080185029Spjd{ 3081185029Spjd spa_t *spa = vd->vdev_spa; 3082185029Spjd 3083219089Spjd ASSERT(spa_writeable(spa)); 3084185029Spjd ASSERT(vd == vd->vdev_top); 3085185029Spjd 3086185029Spjd /* 3087185029Spjd * The state list is protected by the SCL_STATE lock. The caller 3088185029Spjd * must either hold SCL_STATE as writer, or must be the sync thread 3089185029Spjd * (which holds SCL_STATE as reader). There's only one sync thread, 3090185029Spjd * so this is sufficient to ensure mutual exclusion. 3091185029Spjd */ 3092185029Spjd ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 3093185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 3094185029Spjd spa_config_held(spa, SCL_STATE, RW_READER))); 3095185029Spjd 3096219089Spjd if (!list_link_active(&vd->vdev_state_dirty_node) && !vd->vdev_ishole) 3097185029Spjd list_insert_head(&spa->spa_state_dirty_list, vd); 3098185029Spjd} 3099185029Spjd 3100185029Spjdvoid 3101185029Spjdvdev_state_clean(vdev_t *vd) 3102185029Spjd{ 3103185029Spjd spa_t *spa = vd->vdev_spa; 3104185029Spjd 3105185029Spjd ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 3106185029Spjd (dsl_pool_sync_context(spa_get_dsl(spa)) && 3107185029Spjd spa_config_held(spa, SCL_STATE, RW_READER))); 3108185029Spjd 3109185029Spjd ASSERT(list_link_active(&vd->vdev_state_dirty_node)); 3110185029Spjd list_remove(&spa->spa_state_dirty_list, vd); 3111185029Spjd} 3112185029Spjd 3113185029Spjd/* 3114185029Spjd * Propagate vdev state up from children to parent. 3115185029Spjd */ 3116185029Spjdvoid 3117168404Spjdvdev_propagate_state(vdev_t *vd) 3118168404Spjd{ 3119209962Smm spa_t *spa = vd->vdev_spa; 3120209962Smm vdev_t *rvd = spa->spa_root_vdev; 3121168404Spjd int degraded = 0, faulted = 0; 3122168404Spjd int corrupted = 0; 3123168404Spjd vdev_t *child; 3124168404Spjd 3125185029Spjd if (vd->vdev_children > 0) { 3126219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 3127185029Spjd child = vd->vdev_child[c]; 3128168404Spjd 3129219089Spjd /* 3130219089Spjd * Don't factor holes into the decision. 3131219089Spjd */ 3132219089Spjd if (child->vdev_ishole) 3133219089Spjd continue; 3134219089Spjd 3135185029Spjd if (!vdev_readable(child) || 3136209962Smm (!vdev_writeable(child) && spa_writeable(spa))) { 3137185029Spjd /* 3138185029Spjd * Root special: if there is a top-level log 3139185029Spjd * device, treat the root vdev as if it were 3140185029Spjd * degraded. 3141185029Spjd */ 3142185029Spjd if (child->vdev_islog && vd == rvd) 3143185029Spjd degraded++; 3144185029Spjd else 3145185029Spjd faulted++; 3146185029Spjd } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { 3147185029Spjd degraded++; 3148185029Spjd } 3149185029Spjd 3150185029Spjd if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) 3151185029Spjd corrupted++; 3152185029Spjd } 3153185029Spjd 3154185029Spjd vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); 3155185029Spjd 3156185029Spjd /* 3157185029Spjd * Root special: if there is a top-level vdev that cannot be 3158185029Spjd * opened due to corrupted metadata, then propagate the root 3159185029Spjd * vdev's aux state as 'corrupt' rather than 'insufficient 3160185029Spjd * replicas'. 3161185029Spjd */ 3162185029Spjd if (corrupted && vd == rvd && 3163185029Spjd rvd->vdev_state == VDEV_STATE_CANT_OPEN) 3164185029Spjd vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, 3165185029Spjd VDEV_AUX_CORRUPT_DATA); 3166168404Spjd } 3167168404Spjd 3168185029Spjd if (vd->vdev_parent) 3169185029Spjd vdev_propagate_state(vd->vdev_parent); 3170168404Spjd} 3171168404Spjd 3172168404Spjd/* 3173168404Spjd * Set a vdev's state. If this is during an open, we don't update the parent 3174168404Spjd * state, because we're in the process of opening children depth-first. 3175168404Spjd * Otherwise, we propagate the change to the parent. 3176168404Spjd * 3177168404Spjd * If this routine places a device in a faulted state, an appropriate ereport is 3178168404Spjd * generated. 3179168404Spjd */ 3180168404Spjdvoid 3181168404Spjdvdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) 3182168404Spjd{ 3183168404Spjd uint64_t save_state; 3184185029Spjd spa_t *spa = vd->vdev_spa; 3185168404Spjd 3186168404Spjd if (state == vd->vdev_state) { 3187168404Spjd vd->vdev_stat.vs_aux = aux; 3188168404Spjd return; 3189168404Spjd } 3190168404Spjd 3191168404Spjd save_state = vd->vdev_state; 3192168404Spjd 3193168404Spjd vd->vdev_state = state; 3194168404Spjd vd->vdev_stat.vs_aux = aux; 3195168404Spjd 3196173373Spjd /* 3197173373Spjd * If we are setting the vdev state to anything but an open state, then 3198219089Spjd * always close the underlying device unless the device has requested 3199219089Spjd * a delayed close (i.e. we're about to remove or fault the device). 3200219089Spjd * Otherwise, we keep accessible but invalid devices open forever. 3201219089Spjd * We don't call vdev_close() itself, because that implies some extra 3202219089Spjd * checks (offline, etc) that we don't want here. This is limited to 3203219089Spjd * leaf devices, because otherwise closing the device will affect other 3204219089Spjd * children. 3205173373Spjd */ 3206219089Spjd if (!vd->vdev_delayed_close && vdev_is_dead(vd) && 3207219089Spjd vd->vdev_ops->vdev_op_leaf) 3208173373Spjd vd->vdev_ops->vdev_op_close(vd); 3209173373Spjd 3210219089Spjd /* 3211219089Spjd * If we have brought this vdev back into service, we need 3212219089Spjd * to notify fmd so that it can gracefully repair any outstanding 3213219089Spjd * cases due to a missing device. We do this in all cases, even those 3214219089Spjd * that probably don't correlate to a repaired fault. This is sure to 3215219089Spjd * catch all cases, and we let the zfs-retire agent sort it out. If 3216219089Spjd * this is a transient state it's OK, as the retire agent will 3217219089Spjd * double-check the state of the vdev before repairing it. 3218219089Spjd */ 3219219089Spjd if (state == VDEV_STATE_HEALTHY && vd->vdev_ops->vdev_op_leaf && 3220219089Spjd vd->vdev_prevstate != state) 3221219089Spjd zfs_post_state_change(spa, vd); 3222219089Spjd 3223185029Spjd if (vd->vdev_removed && 3224185029Spjd state == VDEV_STATE_CANT_OPEN && 3225185029Spjd (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { 3226168404Spjd /* 3227185029Spjd * If the previous state is set to VDEV_STATE_REMOVED, then this 3228185029Spjd * device was previously marked removed and someone attempted to 3229185029Spjd * reopen it. If this failed due to a nonexistent device, then 3230185029Spjd * keep the device in the REMOVED state. We also let this be if 3231185029Spjd * it is one of our special test online cases, which is only 3232185029Spjd * attempting to online the device and shouldn't generate an FMA 3233185029Spjd * fault. 3234185029Spjd */ 3235185029Spjd vd->vdev_state = VDEV_STATE_REMOVED; 3236185029Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 3237185029Spjd } else if (state == VDEV_STATE_REMOVED) { 3238185029Spjd vd->vdev_removed = B_TRUE; 3239185029Spjd } else if (state == VDEV_STATE_CANT_OPEN) { 3240185029Spjd /* 3241219089Spjd * If we fail to open a vdev during an import or recovery, we 3242219089Spjd * mark it as "not available", which signifies that it was 3243219089Spjd * never there to begin with. Failure to open such a device 3244219089Spjd * is not considered an error. 3245168404Spjd */ 3246219089Spjd if ((spa_load_state(spa) == SPA_LOAD_IMPORT || 3247219089Spjd spa_load_state(spa) == SPA_LOAD_RECOVER) && 3248168404Spjd vd->vdev_ops->vdev_op_leaf) 3249168404Spjd vd->vdev_not_present = 1; 3250168404Spjd 3251168404Spjd /* 3252168404Spjd * Post the appropriate ereport. If the 'prevstate' field is 3253168404Spjd * set to something other than VDEV_STATE_UNKNOWN, it indicates 3254168404Spjd * that this is part of a vdev_reopen(). In this case, we don't 3255168404Spjd * want to post the ereport if the device was already in the 3256168404Spjd * CANT_OPEN state beforehand. 3257185029Spjd * 3258185029Spjd * If the 'checkremove' flag is set, then this is an attempt to 3259185029Spjd * online the device in response to an insertion event. If we 3260185029Spjd * hit this case, then we have detected an insertion event for a 3261185029Spjd * faulted or offline device that wasn't in the removed state. 3262185029Spjd * In this scenario, we don't post an ereport because we are 3263185029Spjd * about to replace the device, or attempt an online with 3264185029Spjd * vdev_forcefault, which will generate the fault for us. 3265168404Spjd */ 3266185029Spjd if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && 3267185029Spjd !vd->vdev_not_present && !vd->vdev_checkremove && 3268185029Spjd vd != spa->spa_root_vdev) { 3269168404Spjd const char *class; 3270168404Spjd 3271168404Spjd switch (aux) { 3272168404Spjd case VDEV_AUX_OPEN_FAILED: 3273168404Spjd class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; 3274168404Spjd break; 3275168404Spjd case VDEV_AUX_CORRUPT_DATA: 3276168404Spjd class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; 3277168404Spjd break; 3278168404Spjd case VDEV_AUX_NO_REPLICAS: 3279168404Spjd class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; 3280168404Spjd break; 3281168404Spjd case VDEV_AUX_BAD_GUID_SUM: 3282168404Spjd class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; 3283168404Spjd break; 3284168404Spjd case VDEV_AUX_TOO_SMALL: 3285168404Spjd class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; 3286168404Spjd break; 3287168404Spjd case VDEV_AUX_BAD_LABEL: 3288168404Spjd class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; 3289168404Spjd break; 3290168404Spjd default: 3291168404Spjd class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; 3292168404Spjd } 3293168404Spjd 3294185029Spjd zfs_ereport_post(class, spa, vd, NULL, save_state, 0); 3295168404Spjd } 3296185029Spjd 3297185029Spjd /* Erase any notion of persistent removed state */ 3298185029Spjd vd->vdev_removed = B_FALSE; 3299185029Spjd } else { 3300185029Spjd vd->vdev_removed = B_FALSE; 3301168404Spjd } 3302168404Spjd 3303209962Smm if (!isopen && vd->vdev_parent) 3304209962Smm vdev_propagate_state(vd->vdev_parent); 3305185029Spjd} 3306168404Spjd 3307185029Spjd/* 3308185029Spjd * Check the vdev configuration to ensure that it's capable of supporting 3309193163Sdfr * a root pool. 3310193163Sdfr * 3311193163Sdfr * On Solaris, we do not support RAID-Z or partial configuration. In 3312193163Sdfr * addition, only a single top-level vdev is allowed and none of the 3313193163Sdfr * leaves can be wholedisks. 3314193163Sdfr * 3315193163Sdfr * For FreeBSD, we can boot from any configuration. There is a 3316193163Sdfr * limitation that the boot filesystem must be either uncompressed or 3317193163Sdfr * compresses with lzjb compression but I'm not sure how to enforce 3318193163Sdfr * that here. 3319185029Spjd */ 3320185029Spjdboolean_t 3321185029Spjdvdev_is_bootable(vdev_t *vd) 3322185029Spjd{ 3323213197Smm#ifdef sun 3324185029Spjd if (!vd->vdev_ops->vdev_op_leaf) { 3325185029Spjd char *vdev_type = vd->vdev_ops->vdev_op_type; 3326185029Spjd 3327185029Spjd if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 && 3328185029Spjd vd->vdev_children > 1) { 3329185029Spjd return (B_FALSE); 3330185029Spjd } else if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 || 3331185029Spjd strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) { 3332185029Spjd return (B_FALSE); 3333185029Spjd } 3334185029Spjd } else if (vd->vdev_wholedisk == 1) { 3335185029Spjd return (B_FALSE); 3336185029Spjd } 3337185029Spjd 3338219089Spjd for (int c = 0; c < vd->vdev_children; c++) { 3339185029Spjd if (!vdev_is_bootable(vd->vdev_child[c])) 3340185029Spjd return (B_FALSE); 3341185029Spjd } 3342213197Smm#endif /* sun */ 3343185029Spjd return (B_TRUE); 3344168404Spjd} 3345213197Smm 3346219089Spjd/* 3347219089Spjd * Load the state from the original vdev tree (ovd) which 3348219089Spjd * we've retrieved from the MOS config object. If the original 3349219089Spjd * vdev was offline or faulted then we transfer that state to the 3350219089Spjd * device in the current vdev tree (nvd). 3351219089Spjd */ 3352213197Smmvoid 3353219089Spjdvdev_load_log_state(vdev_t *nvd, vdev_t *ovd) 3354213197Smm{ 3355219089Spjd spa_t *spa = nvd->vdev_spa; 3356213197Smm 3357219089Spjd ASSERT(nvd->vdev_top->vdev_islog); 3358219089Spjd ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 3359219089Spjd ASSERT3U(nvd->vdev_guid, ==, ovd->vdev_guid); 3360213197Smm 3361219089Spjd for (int c = 0; c < nvd->vdev_children; c++) 3362219089Spjd vdev_load_log_state(nvd->vdev_child[c], ovd->vdev_child[c]); 3363213197Smm 3364219089Spjd if (nvd->vdev_ops->vdev_op_leaf) { 3365213197Smm /* 3366219089Spjd * Restore the persistent vdev state 3367213197Smm */ 3368219089Spjd nvd->vdev_offline = ovd->vdev_offline; 3369219089Spjd nvd->vdev_faulted = ovd->vdev_faulted; 3370219089Spjd nvd->vdev_degraded = ovd->vdev_degraded; 3371219089Spjd nvd->vdev_removed = ovd->vdev_removed; 3372213197Smm } 3373213197Smm} 3374219089Spjd 3375219089Spjd/* 3376219089Spjd * Determine if a log device has valid content. If the vdev was 3377219089Spjd * removed or faulted in the MOS config then we know that 3378219089Spjd * the content on the log device has already been written to the pool. 3379219089Spjd */ 3380219089Spjdboolean_t 3381219089Spjdvdev_log_state_valid(vdev_t *vd) 3382219089Spjd{ 3383219089Spjd if (vd->vdev_ops->vdev_op_leaf && !vd->vdev_faulted && 3384219089Spjd !vd->vdev_removed) 3385219089Spjd return (B_TRUE); 3386219089Spjd 3387219089Spjd for (int c = 0; c < vd->vdev_children; c++) 3388219089Spjd if (vdev_log_state_valid(vd->vdev_child[c])) 3389219089Spjd return (B_TRUE); 3390219089Spjd 3391219089Spjd return (B_FALSE); 3392219089Spjd} 3393219089Spjd 3394219089Spjd/* 3395219089Spjd * Expand a vdev if possible. 3396219089Spjd */ 3397219089Spjdvoid 3398219089Spjdvdev_expand(vdev_t *vd, uint64_t txg) 3399219089Spjd{ 3400219089Spjd ASSERT(vd->vdev_top == vd); 3401219089Spjd ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3402219089Spjd 3403219089Spjd if ((vd->vdev_asize >> vd->vdev_ms_shift) > vd->vdev_ms_count) { 3404219089Spjd VERIFY(vdev_metaslab_init(vd, txg) == 0); 3405219089Spjd vdev_config_dirty(vd); 3406219089Spjd } 3407219089Spjd} 3408219089Spjd 3409219089Spjd/* 3410219089Spjd * Split a vdev. 3411219089Spjd */ 3412219089Spjdvoid 3413219089Spjdvdev_split(vdev_t *vd) 3414219089Spjd{ 3415219089Spjd vdev_t *cvd, *pvd = vd->vdev_parent; 3416219089Spjd 3417219089Spjd vdev_remove_child(pvd, vd); 3418219089Spjd vdev_compact_children(pvd); 3419219089Spjd 3420219089Spjd cvd = pvd->vdev_child[0]; 3421219089Spjd if (pvd->vdev_children == 1) { 3422219089Spjd vdev_remove_parent(cvd); 3423219089Spjd cvd->vdev_splitting = B_TRUE; 3424219089Spjd } 3425219089Spjd vdev_propagate_state(cvd); 3426219089Spjd} 3427248369Smm 3428248369Smmvoid 3429248369Smmvdev_deadman(vdev_t *vd) 3430248369Smm{ 3431248369Smm for (int c = 0; c < vd->vdev_children; c++) { 3432248369Smm vdev_t *cvd = vd->vdev_child[c]; 3433248369Smm 3434248369Smm vdev_deadman(cvd); 3435248369Smm } 3436248369Smm 3437248369Smm if (vd->vdev_ops->vdev_op_leaf) { 3438248369Smm vdev_queue_t *vq = &vd->vdev_queue; 3439248369Smm 3440248369Smm mutex_enter(&vq->vq_lock); 3441260764Savg if (avl_numnodes(&vq->vq_active_tree) > 0) { 3442248369Smm spa_t *spa = vd->vdev_spa; 3443248369Smm zio_t *fio; 3444248369Smm uint64_t delta; 3445248369Smm 3446248369Smm /* 3447248369Smm * Look at the head of all the pending queues, 3448248369Smm * if any I/O has been outstanding for longer than 3449248369Smm * the spa_deadman_synctime we panic the system. 3450248369Smm */ 3451260764Savg fio = avl_first(&vq->vq_active_tree); 3452249643Smm delta = gethrtime() - fio->io_timestamp; 3453249643Smm if (delta > spa_deadman_synctime(spa)) { 3454249643Smm zfs_dbgmsg("SLOW IO: zio timestamp %lluns, " 3455249643Smm "delta %lluns, last io %lluns", 3456248369Smm fio->io_timestamp, delta, 3457248369Smm vq->vq_io_complete_ts); 3458248369Smm fm_panic("I/O to pool '%s' appears to be " 3459248369Smm "hung on vdev guid %llu at '%s'.", 3460248369Smm spa_name(spa), 3461248369Smm (long long unsigned int) vd->vdev_guid, 3462248369Smm vd->vdev_path); 3463248369Smm } 3464248369Smm } 3465248369Smm mutex_exit(&vq->vq_lock); 3466248369Smm } 3467248369Smm} 3468