vdev.c revision 168404
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/* 23168404Spjd * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24168404Spjd * Use is subject to license terms. 25168404Spjd */ 26168404Spjd 27168404Spjd#pragma ident "%Z%%M% %I% %E% SMI" 28168404Spjd 29168404Spjd#include <sys/zfs_context.h> 30168404Spjd#include <sys/fm/fs/zfs.h> 31168404Spjd#include <sys/spa.h> 32168404Spjd#include <sys/spa_impl.h> 33168404Spjd#include <sys/dmu.h> 34168404Spjd#include <sys/dmu_tx.h> 35168404Spjd#include <sys/vdev_impl.h> 36168404Spjd#include <sys/uberblock_impl.h> 37168404Spjd#include <sys/metaslab.h> 38168404Spjd#include <sys/metaslab_impl.h> 39168404Spjd#include <sys/space_map.h> 40168404Spjd#include <sys/zio.h> 41168404Spjd#include <sys/zap.h> 42168404Spjd#include <sys/fs/zfs.h> 43168404Spjd 44168404SpjdSYSCTL_DECL(_vfs_zfs); 45168404SpjdSYSCTL_NODE(_vfs_zfs, OID_AUTO, vdev, CTLFLAG_RW, 0, "ZFS VDEV"); 46168404Spjd 47168404Spjd/* 48168404Spjd * Virtual device management. 49168404Spjd */ 50168404Spjd 51168404Spjdstatic vdev_ops_t *vdev_ops_table[] = { 52168404Spjd &vdev_root_ops, 53168404Spjd &vdev_raidz_ops, 54168404Spjd &vdev_mirror_ops, 55168404Spjd &vdev_replacing_ops, 56168404Spjd &vdev_spare_ops, 57168404Spjd#ifdef _KERNEL 58168404Spjd &vdev_geom_ops, 59168404Spjd#else 60168404Spjd &vdev_disk_ops, 61168404Spjd &vdev_file_ops, 62168404Spjd#endif 63168404Spjd &vdev_missing_ops, 64168404Spjd NULL 65168404Spjd}; 66168404Spjd 67168404Spjd/* maximum scrub/resilver I/O queue */ 68168404Spjdint zfs_scrub_limit = 70; 69168404Spjd 70168404Spjd/* 71168404Spjd * Given a vdev type, return the appropriate ops vector. 72168404Spjd */ 73168404Spjdstatic vdev_ops_t * 74168404Spjdvdev_getops(const char *type) 75168404Spjd{ 76168404Spjd vdev_ops_t *ops, **opspp; 77168404Spjd 78168404Spjd for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) 79168404Spjd if (strcmp(ops->vdev_op_type, type) == 0) 80168404Spjd break; 81168404Spjd 82168404Spjd return (ops); 83168404Spjd} 84168404Spjd 85168404Spjd/* 86168404Spjd * Default asize function: return the MAX of psize with the asize of 87168404Spjd * all children. This is what's used by anything other than RAID-Z. 88168404Spjd */ 89168404Spjduint64_t 90168404Spjdvdev_default_asize(vdev_t *vd, uint64_t psize) 91168404Spjd{ 92168404Spjd uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); 93168404Spjd uint64_t csize; 94168404Spjd uint64_t c; 95168404Spjd 96168404Spjd for (c = 0; c < vd->vdev_children; c++) { 97168404Spjd csize = vdev_psize_to_asize(vd->vdev_child[c], psize); 98168404Spjd asize = MAX(asize, csize); 99168404Spjd } 100168404Spjd 101168404Spjd return (asize); 102168404Spjd} 103168404Spjd 104168404Spjd/* 105168404Spjd * Get the replaceable or attachable device size. 106168404Spjd * If the parent is a mirror or raidz, the replaceable size is the minimum 107168404Spjd * psize of all its children. For the rest, just return our own psize. 108168404Spjd * 109168404Spjd * e.g. 110168404Spjd * psize rsize 111168404Spjd * root - - 112168404Spjd * mirror/raidz - - 113168404Spjd * disk1 20g 20g 114168404Spjd * disk2 40g 20g 115168404Spjd * disk3 80g 80g 116168404Spjd */ 117168404Spjduint64_t 118168404Spjdvdev_get_rsize(vdev_t *vd) 119168404Spjd{ 120168404Spjd vdev_t *pvd, *cvd; 121168404Spjd uint64_t c, rsize; 122168404Spjd 123168404Spjd pvd = vd->vdev_parent; 124168404Spjd 125168404Spjd /* 126168404Spjd * If our parent is NULL or the root, just return our own psize. 127168404Spjd */ 128168404Spjd if (pvd == NULL || pvd->vdev_parent == NULL) 129168404Spjd return (vd->vdev_psize); 130168404Spjd 131168404Spjd rsize = 0; 132168404Spjd 133168404Spjd for (c = 0; c < pvd->vdev_children; c++) { 134168404Spjd cvd = pvd->vdev_child[c]; 135168404Spjd rsize = MIN(rsize - 1, cvd->vdev_psize - 1) + 1; 136168404Spjd } 137168404Spjd 138168404Spjd return (rsize); 139168404Spjd} 140168404Spjd 141168404Spjdvdev_t * 142168404Spjdvdev_lookup_top(spa_t *spa, uint64_t vdev) 143168404Spjd{ 144168404Spjd vdev_t *rvd = spa->spa_root_vdev; 145168404Spjd 146168404Spjd if (vdev < rvd->vdev_children) 147168404Spjd return (rvd->vdev_child[vdev]); 148168404Spjd 149168404Spjd return (NULL); 150168404Spjd} 151168404Spjd 152168404Spjdvdev_t * 153168404Spjdvdev_lookup_by_guid(vdev_t *vd, uint64_t guid) 154168404Spjd{ 155168404Spjd int c; 156168404Spjd vdev_t *mvd; 157168404Spjd 158168404Spjd if (vd->vdev_guid == guid) 159168404Spjd return (vd); 160168404Spjd 161168404Spjd for (c = 0; c < vd->vdev_children; c++) 162168404Spjd if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != 163168404Spjd NULL) 164168404Spjd return (mvd); 165168404Spjd 166168404Spjd return (NULL); 167168404Spjd} 168168404Spjd 169168404Spjdvoid 170168404Spjdvdev_add_child(vdev_t *pvd, vdev_t *cvd) 171168404Spjd{ 172168404Spjd size_t oldsize, newsize; 173168404Spjd uint64_t id = cvd->vdev_id; 174168404Spjd vdev_t **newchild; 175168404Spjd 176168404Spjd ASSERT(spa_config_held(cvd->vdev_spa, RW_WRITER)); 177168404Spjd ASSERT(cvd->vdev_parent == NULL); 178168404Spjd 179168404Spjd cvd->vdev_parent = pvd; 180168404Spjd 181168404Spjd if (pvd == NULL) 182168404Spjd return; 183168404Spjd 184168404Spjd ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); 185168404Spjd 186168404Spjd oldsize = pvd->vdev_children * sizeof (vdev_t *); 187168404Spjd pvd->vdev_children = MAX(pvd->vdev_children, id + 1); 188168404Spjd newsize = pvd->vdev_children * sizeof (vdev_t *); 189168404Spjd 190168404Spjd newchild = kmem_zalloc(newsize, KM_SLEEP); 191168404Spjd if (pvd->vdev_child != NULL) { 192168404Spjd bcopy(pvd->vdev_child, newchild, oldsize); 193168404Spjd kmem_free(pvd->vdev_child, oldsize); 194168404Spjd } 195168404Spjd 196168404Spjd pvd->vdev_child = newchild; 197168404Spjd pvd->vdev_child[id] = cvd; 198168404Spjd 199168404Spjd cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); 200168404Spjd ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); 201168404Spjd 202168404Spjd /* 203168404Spjd * Walk up all ancestors to update guid sum. 204168404Spjd */ 205168404Spjd for (; pvd != NULL; pvd = pvd->vdev_parent) 206168404Spjd pvd->vdev_guid_sum += cvd->vdev_guid_sum; 207168404Spjd 208168404Spjd if (cvd->vdev_ops->vdev_op_leaf) 209168404Spjd cvd->vdev_spa->spa_scrub_maxinflight += zfs_scrub_limit; 210168404Spjd} 211168404Spjd 212168404Spjdvoid 213168404Spjdvdev_remove_child(vdev_t *pvd, vdev_t *cvd) 214168404Spjd{ 215168404Spjd int c; 216168404Spjd uint_t id = cvd->vdev_id; 217168404Spjd 218168404Spjd ASSERT(cvd->vdev_parent == pvd); 219168404Spjd 220168404Spjd if (pvd == NULL) 221168404Spjd return; 222168404Spjd 223168404Spjd ASSERT(id < pvd->vdev_children); 224168404Spjd ASSERT(pvd->vdev_child[id] == cvd); 225168404Spjd 226168404Spjd pvd->vdev_child[id] = NULL; 227168404Spjd cvd->vdev_parent = NULL; 228168404Spjd 229168404Spjd for (c = 0; c < pvd->vdev_children; c++) 230168404Spjd if (pvd->vdev_child[c]) 231168404Spjd break; 232168404Spjd 233168404Spjd if (c == pvd->vdev_children) { 234168404Spjd kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); 235168404Spjd pvd->vdev_child = NULL; 236168404Spjd pvd->vdev_children = 0; 237168404Spjd } 238168404Spjd 239168404Spjd /* 240168404Spjd * Walk up all ancestors to update guid sum. 241168404Spjd */ 242168404Spjd for (; pvd != NULL; pvd = pvd->vdev_parent) 243168404Spjd pvd->vdev_guid_sum -= cvd->vdev_guid_sum; 244168404Spjd 245168404Spjd if (cvd->vdev_ops->vdev_op_leaf) 246168404Spjd cvd->vdev_spa->spa_scrub_maxinflight -= zfs_scrub_limit; 247168404Spjd} 248168404Spjd 249168404Spjd/* 250168404Spjd * Remove any holes in the child array. 251168404Spjd */ 252168404Spjdvoid 253168404Spjdvdev_compact_children(vdev_t *pvd) 254168404Spjd{ 255168404Spjd vdev_t **newchild, *cvd; 256168404Spjd int oldc = pvd->vdev_children; 257168404Spjd int newc, c; 258168404Spjd 259168404Spjd ASSERT(spa_config_held(pvd->vdev_spa, RW_WRITER)); 260168404Spjd 261168404Spjd for (c = newc = 0; c < oldc; c++) 262168404Spjd if (pvd->vdev_child[c]) 263168404Spjd newc++; 264168404Spjd 265168404Spjd newchild = kmem_alloc(newc * sizeof (vdev_t *), KM_SLEEP); 266168404Spjd 267168404Spjd for (c = newc = 0; c < oldc; c++) { 268168404Spjd if ((cvd = pvd->vdev_child[c]) != NULL) { 269168404Spjd newchild[newc] = cvd; 270168404Spjd cvd->vdev_id = newc++; 271168404Spjd } 272168404Spjd } 273168404Spjd 274168404Spjd kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); 275168404Spjd pvd->vdev_child = newchild; 276168404Spjd pvd->vdev_children = newc; 277168404Spjd} 278168404Spjd 279168404Spjd/* 280168404Spjd * Allocate and minimally initialize a vdev_t. 281168404Spjd */ 282168404Spjdstatic vdev_t * 283168404Spjdvdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) 284168404Spjd{ 285168404Spjd vdev_t *vd; 286168404Spjd 287168404Spjd vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP); 288168404Spjd 289168404Spjd if (spa->spa_root_vdev == NULL) { 290168404Spjd ASSERT(ops == &vdev_root_ops); 291168404Spjd spa->spa_root_vdev = vd; 292168404Spjd } 293168404Spjd 294168404Spjd if (guid == 0) { 295168404Spjd if (spa->spa_root_vdev == vd) { 296168404Spjd /* 297168404Spjd * The root vdev's guid will also be the pool guid, 298168404Spjd * which must be unique among all pools. 299168404Spjd */ 300168404Spjd while (guid == 0 || spa_guid_exists(guid, 0)) 301168404Spjd guid = spa_get_random(-1ULL); 302168404Spjd } else { 303168404Spjd /* 304168404Spjd * Any other vdev's guid must be unique within the pool. 305168404Spjd */ 306168404Spjd while (guid == 0 || 307168404Spjd spa_guid_exists(spa_guid(spa), guid)) 308168404Spjd guid = spa_get_random(-1ULL); 309168404Spjd } 310168404Spjd ASSERT(!spa_guid_exists(spa_guid(spa), guid)); 311168404Spjd } 312168404Spjd 313168404Spjd vd->vdev_spa = spa; 314168404Spjd vd->vdev_id = id; 315168404Spjd vd->vdev_guid = guid; 316168404Spjd vd->vdev_guid_sum = guid; 317168404Spjd vd->vdev_ops = ops; 318168404Spjd vd->vdev_state = VDEV_STATE_CLOSED; 319168404Spjd 320168404Spjd mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_DEFAULT, NULL); 321168404Spjd mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); 322168404Spjd space_map_create(&vd->vdev_dtl_map, 0, -1ULL, 0, &vd->vdev_dtl_lock); 323168404Spjd space_map_create(&vd->vdev_dtl_scrub, 0, -1ULL, 0, &vd->vdev_dtl_lock); 324168404Spjd txg_list_create(&vd->vdev_ms_list, 325168404Spjd offsetof(struct metaslab, ms_txg_node)); 326168404Spjd txg_list_create(&vd->vdev_dtl_list, 327168404Spjd offsetof(struct vdev, vdev_dtl_node)); 328168404Spjd vd->vdev_stat.vs_timestamp = gethrtime(); 329168404Spjd 330168404Spjd return (vd); 331168404Spjd} 332168404Spjd 333168404Spjd/* 334168404Spjd * Free a vdev_t that has been removed from service. 335168404Spjd */ 336168404Spjdstatic void 337168404Spjdvdev_free_common(vdev_t *vd) 338168404Spjd{ 339168404Spjd spa_t *spa = vd->vdev_spa; 340168404Spjd 341168404Spjd if (vd->vdev_path) 342168404Spjd spa_strfree(vd->vdev_path); 343168404Spjd if (vd->vdev_devid) 344168404Spjd spa_strfree(vd->vdev_devid); 345168404Spjd 346168404Spjd if (vd->vdev_isspare) 347168404Spjd spa_spare_remove(vd); 348168404Spjd 349168404Spjd txg_list_destroy(&vd->vdev_ms_list); 350168404Spjd txg_list_destroy(&vd->vdev_dtl_list); 351168404Spjd mutex_enter(&vd->vdev_dtl_lock); 352168404Spjd space_map_unload(&vd->vdev_dtl_map); 353168404Spjd space_map_destroy(&vd->vdev_dtl_map); 354168404Spjd space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); 355168404Spjd space_map_destroy(&vd->vdev_dtl_scrub); 356168404Spjd mutex_exit(&vd->vdev_dtl_lock); 357168404Spjd mutex_destroy(&vd->vdev_dtl_lock); 358168404Spjd mutex_destroy(&vd->vdev_stat_lock); 359168404Spjd 360168404Spjd if (vd == spa->spa_root_vdev) 361168404Spjd spa->spa_root_vdev = NULL; 362168404Spjd 363168404Spjd kmem_free(vd, sizeof (vdev_t)); 364168404Spjd} 365168404Spjd 366168404Spjd/* 367168404Spjd * Allocate a new vdev. The 'alloctype' is used to control whether we are 368168404Spjd * creating a new vdev or loading an existing one - the behavior is slightly 369168404Spjd * different for each case. 370168404Spjd */ 371168404Spjdint 372168404Spjdvdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, 373168404Spjd int alloctype) 374168404Spjd{ 375168404Spjd vdev_ops_t *ops; 376168404Spjd char *type; 377168404Spjd uint64_t guid = 0; 378168404Spjd vdev_t *vd; 379168404Spjd 380168404Spjd ASSERT(spa_config_held(spa, RW_WRITER)); 381168404Spjd 382168404Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) 383168404Spjd return (EINVAL); 384168404Spjd 385168404Spjd if ((ops = vdev_getops(type)) == NULL) 386168404Spjd return (EINVAL); 387168404Spjd 388168404Spjd /* 389168404Spjd * If this is a load, get the vdev guid from the nvlist. 390168404Spjd * Otherwise, vdev_alloc_common() will generate one for us. 391168404Spjd */ 392168404Spjd if (alloctype == VDEV_ALLOC_LOAD) { 393168404Spjd uint64_t label_id; 394168404Spjd 395168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || 396168404Spjd label_id != id) 397168404Spjd return (EINVAL); 398168404Spjd 399168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 400168404Spjd return (EINVAL); 401168404Spjd } else if (alloctype == VDEV_ALLOC_SPARE) { 402168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 403168404Spjd return (EINVAL); 404168404Spjd } 405168404Spjd 406168404Spjd /* 407168404Spjd * The first allocated vdev must be of type 'root'. 408168404Spjd */ 409168404Spjd if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) 410168404Spjd return (EINVAL); 411168404Spjd 412168404Spjd vd = vdev_alloc_common(spa, id, guid, ops); 413168404Spjd 414168404Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) 415168404Spjd vd->vdev_path = spa_strdup(vd->vdev_path); 416168404Spjd if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) 417168404Spjd vd->vdev_devid = spa_strdup(vd->vdev_devid); 418168404Spjd 419168404Spjd /* 420168404Spjd * Set the nparity propery for RAID-Z vdevs. 421168404Spjd */ 422168404Spjd if (ops == &vdev_raidz_ops) { 423168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, 424168404Spjd &vd->vdev_nparity) == 0) { 425168404Spjd /* 426168404Spjd * Currently, we can only support 2 parity devices. 427168404Spjd */ 428168404Spjd if (vd->vdev_nparity > 2) 429168404Spjd return (EINVAL); 430168404Spjd /* 431168404Spjd * Older versions can only support 1 parity device. 432168404Spjd */ 433168404Spjd if (vd->vdev_nparity == 2 && 434168404Spjd spa_version(spa) < ZFS_VERSION_RAID6) 435168404Spjd return (ENOTSUP); 436168404Spjd 437168404Spjd } else { 438168404Spjd /* 439168404Spjd * We require the parity to be specified for SPAs that 440168404Spjd * support multiple parity levels. 441168404Spjd */ 442168404Spjd if (spa_version(spa) >= ZFS_VERSION_RAID6) 443168404Spjd return (EINVAL); 444168404Spjd 445168404Spjd /* 446168404Spjd * Otherwise, we default to 1 parity device for RAID-Z. 447168404Spjd */ 448168404Spjd vd->vdev_nparity = 1; 449168404Spjd } 450168404Spjd } else { 451168404Spjd vd->vdev_nparity = 0; 452168404Spjd } 453168404Spjd 454168404Spjd /* 455168404Spjd * Set the whole_disk property. If it's not specified, leave the value 456168404Spjd * as -1. 457168404Spjd */ 458168404Spjd if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, 459168404Spjd &vd->vdev_wholedisk) != 0) 460168404Spjd vd->vdev_wholedisk = -1ULL; 461168404Spjd 462168404Spjd /* 463168404Spjd * Look for the 'not present' flag. This will only be set if the device 464168404Spjd * was not present at the time of import. 465168404Spjd */ 466168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, 467168404Spjd &vd->vdev_not_present); 468168404Spjd 469168404Spjd /* 470168404Spjd * Get the alignment requirement. 471168404Spjd */ 472168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); 473168404Spjd 474168404Spjd /* 475168404Spjd * If we're a top-level vdev, try to load the allocation parameters. 476168404Spjd */ 477168404Spjd if (parent && !parent->vdev_parent && alloctype == VDEV_ALLOC_LOAD) { 478168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, 479168404Spjd &vd->vdev_ms_array); 480168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, 481168404Spjd &vd->vdev_ms_shift); 482168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, 483168404Spjd &vd->vdev_asize); 484168404Spjd } 485168404Spjd 486168404Spjd /* 487168404Spjd * If we're a leaf vdev, try to load the DTL object and offline state. 488168404Spjd */ 489168404Spjd if (vd->vdev_ops->vdev_op_leaf && alloctype == VDEV_ALLOC_LOAD) { 490168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, 491168404Spjd &vd->vdev_dtl.smo_object); 492168404Spjd (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, 493168404Spjd &vd->vdev_offline); 494168404Spjd } 495168404Spjd 496168404Spjd /* 497168404Spjd * Add ourselves to the parent's list of children. 498168404Spjd */ 499168404Spjd vdev_add_child(parent, vd); 500168404Spjd 501168404Spjd *vdp = vd; 502168404Spjd 503168404Spjd return (0); 504168404Spjd} 505168404Spjd 506168404Spjdvoid 507168404Spjdvdev_free(vdev_t *vd) 508168404Spjd{ 509168404Spjd int c; 510168404Spjd 511168404Spjd /* 512168404Spjd * vdev_free() implies closing the vdev first. This is simpler than 513168404Spjd * trying to ensure complicated semantics for all callers. 514168404Spjd */ 515168404Spjd vdev_close(vd); 516168404Spjd 517168404Spjd ASSERT(!list_link_active(&vd->vdev_dirty_node)); 518168404Spjd 519168404Spjd /* 520168404Spjd * Free all children. 521168404Spjd */ 522168404Spjd for (c = 0; c < vd->vdev_children; c++) 523168404Spjd vdev_free(vd->vdev_child[c]); 524168404Spjd 525168404Spjd ASSERT(vd->vdev_child == NULL); 526168404Spjd ASSERT(vd->vdev_guid_sum == vd->vdev_guid); 527168404Spjd 528168404Spjd /* 529168404Spjd * Discard allocation state. 530168404Spjd */ 531168404Spjd if (vd == vd->vdev_top) 532168404Spjd vdev_metaslab_fini(vd); 533168404Spjd 534168404Spjd ASSERT3U(vd->vdev_stat.vs_space, ==, 0); 535168404Spjd ASSERT3U(vd->vdev_stat.vs_dspace, ==, 0); 536168404Spjd ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0); 537168404Spjd 538168404Spjd /* 539168404Spjd * Remove this vdev from its parent's child list. 540168404Spjd */ 541168404Spjd vdev_remove_child(vd->vdev_parent, vd); 542168404Spjd 543168404Spjd ASSERT(vd->vdev_parent == NULL); 544168404Spjd 545168404Spjd vdev_free_common(vd); 546168404Spjd} 547168404Spjd 548168404Spjd/* 549168404Spjd * Transfer top-level vdev state from svd to tvd. 550168404Spjd */ 551168404Spjdstatic void 552168404Spjdvdev_top_transfer(vdev_t *svd, vdev_t *tvd) 553168404Spjd{ 554168404Spjd spa_t *spa = svd->vdev_spa; 555168404Spjd metaslab_t *msp; 556168404Spjd vdev_t *vd; 557168404Spjd int t; 558168404Spjd 559168404Spjd ASSERT(tvd == tvd->vdev_top); 560168404Spjd 561168404Spjd tvd->vdev_ms_array = svd->vdev_ms_array; 562168404Spjd tvd->vdev_ms_shift = svd->vdev_ms_shift; 563168404Spjd tvd->vdev_ms_count = svd->vdev_ms_count; 564168404Spjd 565168404Spjd svd->vdev_ms_array = 0; 566168404Spjd svd->vdev_ms_shift = 0; 567168404Spjd svd->vdev_ms_count = 0; 568168404Spjd 569168404Spjd tvd->vdev_mg = svd->vdev_mg; 570168404Spjd tvd->vdev_ms = svd->vdev_ms; 571168404Spjd 572168404Spjd svd->vdev_mg = NULL; 573168404Spjd svd->vdev_ms = NULL; 574168404Spjd 575168404Spjd if (tvd->vdev_mg != NULL) 576168404Spjd tvd->vdev_mg->mg_vd = tvd; 577168404Spjd 578168404Spjd tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; 579168404Spjd tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; 580168404Spjd tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; 581168404Spjd 582168404Spjd svd->vdev_stat.vs_alloc = 0; 583168404Spjd svd->vdev_stat.vs_space = 0; 584168404Spjd svd->vdev_stat.vs_dspace = 0; 585168404Spjd 586168404Spjd for (t = 0; t < TXG_SIZE; t++) { 587168404Spjd while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) 588168404Spjd (void) txg_list_add(&tvd->vdev_ms_list, msp, t); 589168404Spjd while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) 590168404Spjd (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); 591168404Spjd if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) 592168404Spjd (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); 593168404Spjd } 594168404Spjd 595168404Spjd if (list_link_active(&svd->vdev_dirty_node)) { 596168404Spjd vdev_config_clean(svd); 597168404Spjd vdev_config_dirty(tvd); 598168404Spjd } 599168404Spjd 600168404Spjd tvd->vdev_reopen_wanted = svd->vdev_reopen_wanted; 601168404Spjd svd->vdev_reopen_wanted = 0; 602168404Spjd 603168404Spjd tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; 604168404Spjd svd->vdev_deflate_ratio = 0; 605168404Spjd} 606168404Spjd 607168404Spjdstatic void 608168404Spjdvdev_top_update(vdev_t *tvd, vdev_t *vd) 609168404Spjd{ 610168404Spjd int c; 611168404Spjd 612168404Spjd if (vd == NULL) 613168404Spjd return; 614168404Spjd 615168404Spjd vd->vdev_top = tvd; 616168404Spjd 617168404Spjd for (c = 0; c < vd->vdev_children; c++) 618168404Spjd vdev_top_update(tvd, vd->vdev_child[c]); 619168404Spjd} 620168404Spjd 621168404Spjd/* 622168404Spjd * Add a mirror/replacing vdev above an existing vdev. 623168404Spjd */ 624168404Spjdvdev_t * 625168404Spjdvdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) 626168404Spjd{ 627168404Spjd spa_t *spa = cvd->vdev_spa; 628168404Spjd vdev_t *pvd = cvd->vdev_parent; 629168404Spjd vdev_t *mvd; 630168404Spjd 631168404Spjd ASSERT(spa_config_held(spa, RW_WRITER)); 632168404Spjd 633168404Spjd mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); 634168404Spjd 635168404Spjd mvd->vdev_asize = cvd->vdev_asize; 636168404Spjd mvd->vdev_ashift = cvd->vdev_ashift; 637168404Spjd mvd->vdev_state = cvd->vdev_state; 638168404Spjd 639168404Spjd vdev_remove_child(pvd, cvd); 640168404Spjd vdev_add_child(pvd, mvd); 641168404Spjd cvd->vdev_id = mvd->vdev_children; 642168404Spjd vdev_add_child(mvd, cvd); 643168404Spjd vdev_top_update(cvd->vdev_top, cvd->vdev_top); 644168404Spjd 645168404Spjd if (mvd == mvd->vdev_top) 646168404Spjd vdev_top_transfer(cvd, mvd); 647168404Spjd 648168404Spjd return (mvd); 649168404Spjd} 650168404Spjd 651168404Spjd/* 652168404Spjd * Remove a 1-way mirror/replacing vdev from the tree. 653168404Spjd */ 654168404Spjdvoid 655168404Spjdvdev_remove_parent(vdev_t *cvd) 656168404Spjd{ 657168404Spjd vdev_t *mvd = cvd->vdev_parent; 658168404Spjd vdev_t *pvd = mvd->vdev_parent; 659168404Spjd 660168404Spjd ASSERT(spa_config_held(cvd->vdev_spa, RW_WRITER)); 661168404Spjd 662168404Spjd ASSERT(mvd->vdev_children == 1); 663168404Spjd ASSERT(mvd->vdev_ops == &vdev_mirror_ops || 664168404Spjd mvd->vdev_ops == &vdev_replacing_ops || 665168404Spjd mvd->vdev_ops == &vdev_spare_ops); 666168404Spjd cvd->vdev_ashift = mvd->vdev_ashift; 667168404Spjd 668168404Spjd vdev_remove_child(mvd, cvd); 669168404Spjd vdev_remove_child(pvd, mvd); 670168404Spjd cvd->vdev_id = mvd->vdev_id; 671168404Spjd vdev_add_child(pvd, cvd); 672168404Spjd /* 673168404Spjd * If we created a new toplevel vdev, then we need to change the child's 674168404Spjd * vdev GUID to match the old toplevel vdev. Otherwise, we could have 675168404Spjd * detached an offline device, and when we go to import the pool we'll 676168404Spjd * think we have two toplevel vdevs, instead of a different version of 677168404Spjd * the same toplevel vdev. 678168404Spjd */ 679168404Spjd if (cvd->vdev_top == cvd) { 680168404Spjd pvd->vdev_guid_sum -= cvd->vdev_guid; 681168404Spjd cvd->vdev_guid_sum -= cvd->vdev_guid; 682168404Spjd cvd->vdev_guid = mvd->vdev_guid; 683168404Spjd cvd->vdev_guid_sum += mvd->vdev_guid; 684168404Spjd pvd->vdev_guid_sum += cvd->vdev_guid; 685168404Spjd } 686168404Spjd vdev_top_update(cvd->vdev_top, cvd->vdev_top); 687168404Spjd 688168404Spjd if (cvd == cvd->vdev_top) 689168404Spjd vdev_top_transfer(mvd, cvd); 690168404Spjd 691168404Spjd ASSERT(mvd->vdev_children == 0); 692168404Spjd vdev_free(mvd); 693168404Spjd} 694168404Spjd 695168404Spjdint 696168404Spjdvdev_metaslab_init(vdev_t *vd, uint64_t txg) 697168404Spjd{ 698168404Spjd spa_t *spa = vd->vdev_spa; 699168404Spjd objset_t *mos = spa->spa_meta_objset; 700168404Spjd metaslab_class_t *mc = spa_metaslab_class_select(spa); 701168404Spjd uint64_t m; 702168404Spjd uint64_t oldc = vd->vdev_ms_count; 703168404Spjd uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; 704168404Spjd metaslab_t **mspp; 705168404Spjd int error; 706168404Spjd 707168404Spjd if (vd->vdev_ms_shift == 0) /* not being allocated from yet */ 708168404Spjd return (0); 709168404Spjd 710168404Spjd dprintf("%s oldc %llu newc %llu\n", vdev_description(vd), oldc, newc); 711168404Spjd 712168404Spjd ASSERT(oldc <= newc); 713168404Spjd 714168404Spjd if (vd->vdev_mg == NULL) 715168404Spjd vd->vdev_mg = metaslab_group_create(mc, vd); 716168404Spjd 717168404Spjd mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); 718168404Spjd 719168404Spjd if (oldc != 0) { 720168404Spjd bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); 721168404Spjd kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); 722168404Spjd } 723168404Spjd 724168404Spjd vd->vdev_ms = mspp; 725168404Spjd vd->vdev_ms_count = newc; 726168404Spjd 727168404Spjd for (m = oldc; m < newc; m++) { 728168404Spjd space_map_obj_t smo = { 0, 0, 0 }; 729168404Spjd if (txg == 0) { 730168404Spjd uint64_t object = 0; 731168404Spjd error = dmu_read(mos, vd->vdev_ms_array, 732168404Spjd m * sizeof (uint64_t), sizeof (uint64_t), &object); 733168404Spjd if (error) 734168404Spjd return (error); 735168404Spjd if (object != 0) { 736168404Spjd dmu_buf_t *db; 737168404Spjd error = dmu_bonus_hold(mos, object, FTAG, &db); 738168404Spjd if (error) 739168404Spjd return (error); 740168404Spjd ASSERT3U(db->db_size, ==, sizeof (smo)); 741168404Spjd bcopy(db->db_data, &smo, db->db_size); 742168404Spjd ASSERT3U(smo.smo_object, ==, object); 743168404Spjd dmu_buf_rele(db, FTAG); 744168404Spjd } 745168404Spjd } 746168404Spjd vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, 747168404Spjd m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); 748168404Spjd } 749168404Spjd 750168404Spjd return (0); 751168404Spjd} 752168404Spjd 753168404Spjdvoid 754168404Spjdvdev_metaslab_fini(vdev_t *vd) 755168404Spjd{ 756168404Spjd uint64_t m; 757168404Spjd uint64_t count = vd->vdev_ms_count; 758168404Spjd 759168404Spjd if (vd->vdev_ms != NULL) { 760168404Spjd for (m = 0; m < count; m++) 761168404Spjd if (vd->vdev_ms[m] != NULL) 762168404Spjd metaslab_fini(vd->vdev_ms[m]); 763168404Spjd kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); 764168404Spjd vd->vdev_ms = NULL; 765168404Spjd } 766168404Spjd} 767168404Spjd 768168404Spjd/* 769168404Spjd * Prepare a virtual device for access. 770168404Spjd */ 771168404Spjdint 772168404Spjdvdev_open(vdev_t *vd) 773168404Spjd{ 774168404Spjd int error; 775168404Spjd int c; 776168404Spjd uint64_t osize = 0; 777168404Spjd uint64_t asize, psize; 778168404Spjd uint64_t ashift = 0; 779168404Spjd 780168404Spjd ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || 781168404Spjd vd->vdev_state == VDEV_STATE_CANT_OPEN || 782168404Spjd vd->vdev_state == VDEV_STATE_OFFLINE); 783168404Spjd 784168404Spjd if (vd->vdev_fault_mode == VDEV_FAULT_COUNT) 785168404Spjd vd->vdev_fault_arg >>= 1; 786168404Spjd else 787168404Spjd vd->vdev_fault_mode = VDEV_FAULT_NONE; 788168404Spjd 789168404Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 790168404Spjd 791168404Spjd if (vd->vdev_ops->vdev_op_leaf) { 792168404Spjd vdev_cache_init(vd); 793168404Spjd vdev_queue_init(vd); 794168404Spjd vd->vdev_cache_active = B_TRUE; 795168404Spjd } 796168404Spjd 797168404Spjd if (vd->vdev_offline) { 798168404Spjd ASSERT(vd->vdev_children == 0); 799168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); 800168404Spjd return (ENXIO); 801168404Spjd } 802168404Spjd 803168404Spjd error = vd->vdev_ops->vdev_op_open(vd, &osize, &ashift); 804168404Spjd 805168404Spjd if (zio_injection_enabled && error == 0) 806168404Spjd error = zio_handle_device_injection(vd, ENXIO); 807168404Spjd 808168404Spjd dprintf("%s = %d, osize %llu, state = %d\n", 809168404Spjd vdev_description(vd), error, osize, vd->vdev_state); 810168404Spjd 811168404Spjd if (error) { 812168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 813168404Spjd vd->vdev_stat.vs_aux); 814168404Spjd return (error); 815168404Spjd } 816168404Spjd 817168404Spjd vd->vdev_state = VDEV_STATE_HEALTHY; 818168404Spjd 819168404Spjd for (c = 0; c < vd->vdev_children; c++) 820168404Spjd if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { 821168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 822168404Spjd VDEV_AUX_NONE); 823168404Spjd break; 824168404Spjd } 825168404Spjd 826168404Spjd osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); 827168404Spjd 828168404Spjd if (vd->vdev_children == 0) { 829168404Spjd if (osize < SPA_MINDEVSIZE) { 830168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 831168404Spjd VDEV_AUX_TOO_SMALL); 832168404Spjd return (EOVERFLOW); 833168404Spjd } 834168404Spjd psize = osize; 835168404Spjd asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); 836168404Spjd } else { 837168404Spjd if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - 838168404Spjd (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { 839168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 840168404Spjd VDEV_AUX_TOO_SMALL); 841168404Spjd return (EOVERFLOW); 842168404Spjd } 843168404Spjd psize = 0; 844168404Spjd asize = osize; 845168404Spjd } 846168404Spjd 847168404Spjd vd->vdev_psize = psize; 848168404Spjd 849168404Spjd if (vd->vdev_asize == 0) { 850168404Spjd /* 851168404Spjd * This is the first-ever open, so use the computed values. 852168404Spjd * For testing purposes, a higher ashift can be requested. 853168404Spjd */ 854168404Spjd vd->vdev_asize = asize; 855168404Spjd vd->vdev_ashift = MAX(ashift, vd->vdev_ashift); 856168404Spjd } else { 857168404Spjd /* 858168404Spjd * Make sure the alignment requirement hasn't increased. 859168404Spjd */ 860168404Spjd if (ashift > vd->vdev_top->vdev_ashift) { 861168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 862168404Spjd VDEV_AUX_BAD_LABEL); 863168404Spjd return (EINVAL); 864168404Spjd } 865168404Spjd 866168404Spjd /* 867168404Spjd * Make sure the device hasn't shrunk. 868168404Spjd */ 869168404Spjd if (asize < vd->vdev_asize) { 870168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 871168404Spjd VDEV_AUX_BAD_LABEL); 872168404Spjd return (EINVAL); 873168404Spjd } 874168404Spjd 875168404Spjd /* 876168404Spjd * If all children are healthy and the asize has increased, 877168404Spjd * then we've experienced dynamic LUN growth. 878168404Spjd */ 879168404Spjd if (vd->vdev_state == VDEV_STATE_HEALTHY && 880168404Spjd asize > vd->vdev_asize) { 881168404Spjd vd->vdev_asize = asize; 882168404Spjd } 883168404Spjd } 884168404Spjd 885168404Spjd /* 886168404Spjd * If this is a top-level vdev, compute the raidz-deflation 887168404Spjd * ratio. Note, we hard-code in 128k (1<<17) because it is the 888168404Spjd * current "typical" blocksize. Even if SPA_MAXBLOCKSIZE 889168404Spjd * changes, this algorithm must never change, or we will 890168404Spjd * inconsistently account for existing bp's. 891168404Spjd */ 892168404Spjd if (vd->vdev_top == vd) { 893168404Spjd vd->vdev_deflate_ratio = (1<<17) / 894168404Spjd (vdev_psize_to_asize(vd, 1<<17) >> SPA_MINBLOCKSHIFT); 895168404Spjd } 896168404Spjd 897168404Spjd /* 898168404Spjd * This allows the ZFS DE to close cases appropriately. If a device 899168404Spjd * goes away and later returns, we want to close the associated case. 900168404Spjd * But it's not enough to simply post this only when a device goes from 901168404Spjd * CANT_OPEN -> HEALTHY. If we reboot the system and the device is 902168404Spjd * back, we also need to close the case (otherwise we will try to replay 903168404Spjd * it). So we have to post this notifier every time. Since this only 904168404Spjd * occurs during pool open or error recovery, this should not be an 905168404Spjd * issue. 906168404Spjd */ 907168404Spjd zfs_post_ok(vd->vdev_spa, vd); 908168404Spjd 909168404Spjd return (0); 910168404Spjd} 911168404Spjd 912168404Spjd/* 913168404Spjd * Called once the vdevs are all opened, this routine validates the label 914168404Spjd * contents. This needs to be done before vdev_load() so that we don't 915168404Spjd * inadvertently do repair I/Os to the wrong device, and so that vdev_reopen() 916168404Spjd * won't succeed if the device has been changed underneath. 917168404Spjd * 918168404Spjd * This function will only return failure if one of the vdevs indicates that it 919168404Spjd * has since been destroyed or exported. This is only possible if 920168404Spjd * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state 921168404Spjd * will be updated but the function will return 0. 922168404Spjd */ 923168404Spjdint 924168404Spjdvdev_validate(vdev_t *vd) 925168404Spjd{ 926168404Spjd spa_t *spa = vd->vdev_spa; 927168404Spjd int c; 928168404Spjd nvlist_t *label; 929168404Spjd uint64_t guid; 930168404Spjd uint64_t state; 931168404Spjd 932168404Spjd for (c = 0; c < vd->vdev_children; c++) 933168404Spjd if (vdev_validate(vd->vdev_child[c]) != 0) 934168404Spjd return (-1); 935168404Spjd 936168404Spjd /* 937168404Spjd * If the device has already failed, or was marked offline, don't do 938168404Spjd * any further validation. Otherwise, label I/O will fail and we will 939168404Spjd * overwrite the previous state. 940168404Spjd */ 941168404Spjd if (vd->vdev_ops->vdev_op_leaf && !vdev_is_dead(vd)) { 942168404Spjd 943168404Spjd if ((label = vdev_label_read_config(vd)) == NULL) { 944168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 945168404Spjd VDEV_AUX_BAD_LABEL); 946168404Spjd return (0); 947168404Spjd } 948168404Spjd 949168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, 950168404Spjd &guid) != 0 || guid != spa_guid(spa)) { 951168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 952168404Spjd VDEV_AUX_CORRUPT_DATA); 953168404Spjd nvlist_free(label); 954168404Spjd return (0); 955168404Spjd } 956168404Spjd 957168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, 958168404Spjd &guid) != 0 || guid != vd->vdev_guid) { 959168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 960168404Spjd VDEV_AUX_CORRUPT_DATA); 961168404Spjd nvlist_free(label); 962168404Spjd return (0); 963168404Spjd } 964168404Spjd 965168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, 966168404Spjd &state) != 0) { 967168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 968168404Spjd VDEV_AUX_CORRUPT_DATA); 969168404Spjd nvlist_free(label); 970168404Spjd return (0); 971168404Spjd } 972168404Spjd 973168404Spjd nvlist_free(label); 974168404Spjd 975168404Spjd if (spa->spa_load_state == SPA_LOAD_OPEN && 976168404Spjd state != POOL_STATE_ACTIVE) 977168404Spjd return (-1); 978168404Spjd } 979168404Spjd 980168404Spjd /* 981168404Spjd * If we were able to open and validate a vdev that was previously 982168404Spjd * marked permanently unavailable, clear that state now. 983168404Spjd */ 984168404Spjd if (vd->vdev_not_present) 985168404Spjd vd->vdev_not_present = 0; 986168404Spjd 987168404Spjd return (0); 988168404Spjd} 989168404Spjd 990168404Spjd/* 991168404Spjd * Close a virtual device. 992168404Spjd */ 993168404Spjdvoid 994168404Spjdvdev_close(vdev_t *vd) 995168404Spjd{ 996168404Spjd vd->vdev_ops->vdev_op_close(vd); 997168404Spjd 998168404Spjd if (vd->vdev_cache_active) { 999168404Spjd vdev_cache_fini(vd); 1000168404Spjd vdev_queue_fini(vd); 1001168404Spjd vd->vdev_cache_active = B_FALSE; 1002168404Spjd } 1003168404Spjd 1004168404Spjd /* 1005168404Spjd * We record the previous state before we close it, so that if we are 1006168404Spjd * doing a reopen(), we don't generate FMA ereports if we notice that 1007168404Spjd * it's still faulted. 1008168404Spjd */ 1009168404Spjd vd->vdev_prevstate = vd->vdev_state; 1010168404Spjd 1011168404Spjd if (vd->vdev_offline) 1012168404Spjd vd->vdev_state = VDEV_STATE_OFFLINE; 1013168404Spjd else 1014168404Spjd vd->vdev_state = VDEV_STATE_CLOSED; 1015168404Spjd vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 1016168404Spjd} 1017168404Spjd 1018168404Spjdvoid 1019168404Spjdvdev_reopen(vdev_t *vd) 1020168404Spjd{ 1021168404Spjd spa_t *spa = vd->vdev_spa; 1022168404Spjd 1023168404Spjd ASSERT(spa_config_held(spa, RW_WRITER)); 1024168404Spjd 1025168404Spjd vdev_close(vd); 1026168404Spjd (void) vdev_open(vd); 1027168404Spjd 1028168404Spjd /* 1029168404Spjd * Call vdev_validate() here to make sure we have the same device. 1030168404Spjd * Otherwise, a device with an invalid label could be successfully 1031168404Spjd * opened in response to vdev_reopen(). 1032168404Spjd * 1033168404Spjd * The downside to this is that if the user is simply experimenting by 1034168404Spjd * overwriting an entire disk, we'll fault the device rather than 1035168404Spjd * demonstrate self-healing capabilities. On the other hand, with 1036168404Spjd * proper FMA integration, the series of errors we'd see from the device 1037168404Spjd * would result in a faulted device anyway. Given that this doesn't 1038168404Spjd * model any real-world corruption, it's better to catch this here and 1039168404Spjd * correctly identify that the device has either changed beneath us, or 1040168404Spjd * is corrupted beyond recognition. 1041168404Spjd */ 1042168404Spjd (void) vdev_validate(vd); 1043168404Spjd 1044168404Spjd /* 1045168404Spjd * Reassess root vdev's health. 1046168404Spjd */ 1047168404Spjd vdev_propagate_state(spa->spa_root_vdev); 1048168404Spjd} 1049168404Spjd 1050168404Spjdint 1051168404Spjdvdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) 1052168404Spjd{ 1053168404Spjd int error; 1054168404Spjd 1055168404Spjd /* 1056168404Spjd * Normally, partial opens (e.g. of a mirror) are allowed. 1057168404Spjd * For a create, however, we want to fail the request if 1058168404Spjd * there are any components we can't open. 1059168404Spjd */ 1060168404Spjd error = vdev_open(vd); 1061168404Spjd 1062168404Spjd if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { 1063168404Spjd vdev_close(vd); 1064168404Spjd return (error ? error : ENXIO); 1065168404Spjd } 1066168404Spjd 1067168404Spjd /* 1068168404Spjd * Recursively initialize all labels. 1069168404Spjd */ 1070168404Spjd if ((error = vdev_label_init(vd, txg, isreplacing ? 1071168404Spjd VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { 1072168404Spjd vdev_close(vd); 1073168404Spjd return (error); 1074168404Spjd } 1075168404Spjd 1076168404Spjd return (0); 1077168404Spjd} 1078168404Spjd 1079168404Spjd/* 1080168404Spjd * The is the latter half of vdev_create(). It is distinct because it 1081168404Spjd * involves initiating transactions in order to do metaslab creation. 1082168404Spjd * For creation, we want to try to create all vdevs at once and then undo it 1083168404Spjd * if anything fails; this is much harder if we have pending transactions. 1084168404Spjd */ 1085168404Spjdvoid 1086168404Spjdvdev_init(vdev_t *vd, uint64_t txg) 1087168404Spjd{ 1088168404Spjd /* 1089168404Spjd * Aim for roughly 200 metaslabs per vdev. 1090168404Spjd */ 1091168404Spjd vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); 1092168404Spjd vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); 1093168404Spjd 1094168404Spjd /* 1095168404Spjd * Initialize the vdev's metaslabs. This can't fail because 1096168404Spjd * there's nothing to read when creating all new metaslabs. 1097168404Spjd */ 1098168404Spjd VERIFY(vdev_metaslab_init(vd, txg) == 0); 1099168404Spjd} 1100168404Spjd 1101168404Spjdvoid 1102168404Spjdvdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) 1103168404Spjd{ 1104168404Spjd ASSERT(vd == vd->vdev_top); 1105168404Spjd ASSERT(ISP2(flags)); 1106168404Spjd 1107168404Spjd if (flags & VDD_METASLAB) 1108168404Spjd (void) txg_list_add(&vd->vdev_ms_list, arg, txg); 1109168404Spjd 1110168404Spjd if (flags & VDD_DTL) 1111168404Spjd (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); 1112168404Spjd 1113168404Spjd (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); 1114168404Spjd} 1115168404Spjd 1116168404Spjdvoid 1117168404Spjdvdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size) 1118168404Spjd{ 1119168404Spjd mutex_enter(sm->sm_lock); 1120168404Spjd if (!space_map_contains(sm, txg, size)) 1121168404Spjd space_map_add(sm, txg, size); 1122168404Spjd mutex_exit(sm->sm_lock); 1123168404Spjd} 1124168404Spjd 1125168404Spjdint 1126168404Spjdvdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size) 1127168404Spjd{ 1128168404Spjd int dirty; 1129168404Spjd 1130168404Spjd /* 1131168404Spjd * Quick test without the lock -- covers the common case that 1132168404Spjd * there are no dirty time segments. 1133168404Spjd */ 1134168404Spjd if (sm->sm_space == 0) 1135168404Spjd return (0); 1136168404Spjd 1137168404Spjd mutex_enter(sm->sm_lock); 1138168404Spjd dirty = space_map_contains(sm, txg, size); 1139168404Spjd mutex_exit(sm->sm_lock); 1140168404Spjd 1141168404Spjd return (dirty); 1142168404Spjd} 1143168404Spjd 1144168404Spjd/* 1145168404Spjd * Reassess DTLs after a config change or scrub completion. 1146168404Spjd */ 1147168404Spjdvoid 1148168404Spjdvdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) 1149168404Spjd{ 1150168404Spjd spa_t *spa = vd->vdev_spa; 1151168404Spjd int c; 1152168404Spjd 1153168404Spjd ASSERT(spa_config_held(spa, RW_WRITER)); 1154168404Spjd 1155168404Spjd if (vd->vdev_children == 0) { 1156168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1157168404Spjd /* 1158168404Spjd * We're successfully scrubbed everything up to scrub_txg. 1159168404Spjd * Therefore, excise all old DTLs up to that point, then 1160168404Spjd * fold in the DTLs for everything we couldn't scrub. 1161168404Spjd */ 1162168404Spjd if (scrub_txg != 0) { 1163168404Spjd space_map_excise(&vd->vdev_dtl_map, 0, scrub_txg); 1164168404Spjd space_map_union(&vd->vdev_dtl_map, &vd->vdev_dtl_scrub); 1165168404Spjd } 1166168404Spjd if (scrub_done) 1167168404Spjd space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); 1168168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1169168404Spjd if (txg != 0) 1170168404Spjd vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); 1171168404Spjd return; 1172168404Spjd } 1173168404Spjd 1174168404Spjd /* 1175168404Spjd * Make sure the DTLs are always correct under the scrub lock. 1176168404Spjd */ 1177168404Spjd if (vd == spa->spa_root_vdev) 1178168404Spjd mutex_enter(&spa->spa_scrub_lock); 1179168404Spjd 1180168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1181168404Spjd space_map_vacate(&vd->vdev_dtl_map, NULL, NULL); 1182168404Spjd space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); 1183168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1184168404Spjd 1185168404Spjd for (c = 0; c < vd->vdev_children; c++) { 1186168404Spjd vdev_t *cvd = vd->vdev_child[c]; 1187168404Spjd vdev_dtl_reassess(cvd, txg, scrub_txg, scrub_done); 1188168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1189168404Spjd space_map_union(&vd->vdev_dtl_map, &cvd->vdev_dtl_map); 1190168404Spjd space_map_union(&vd->vdev_dtl_scrub, &cvd->vdev_dtl_scrub); 1191168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1192168404Spjd } 1193168404Spjd 1194168404Spjd if (vd == spa->spa_root_vdev) 1195168404Spjd mutex_exit(&spa->spa_scrub_lock); 1196168404Spjd} 1197168404Spjd 1198168404Spjdstatic int 1199168404Spjdvdev_dtl_load(vdev_t *vd) 1200168404Spjd{ 1201168404Spjd spa_t *spa = vd->vdev_spa; 1202168404Spjd space_map_obj_t *smo = &vd->vdev_dtl; 1203168404Spjd objset_t *mos = spa->spa_meta_objset; 1204168404Spjd dmu_buf_t *db; 1205168404Spjd int error; 1206168404Spjd 1207168404Spjd ASSERT(vd->vdev_children == 0); 1208168404Spjd 1209168404Spjd if (smo->smo_object == 0) 1210168404Spjd return (0); 1211168404Spjd 1212168404Spjd if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) 1213168404Spjd return (error); 1214168404Spjd 1215168404Spjd ASSERT3U(db->db_size, ==, sizeof (*smo)); 1216168404Spjd bcopy(db->db_data, smo, db->db_size); 1217168404Spjd dmu_buf_rele(db, FTAG); 1218168404Spjd 1219168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1220168404Spjd error = space_map_load(&vd->vdev_dtl_map, NULL, SM_ALLOC, smo, mos); 1221168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1222168404Spjd 1223168404Spjd return (error); 1224168404Spjd} 1225168404Spjd 1226168404Spjdvoid 1227168404Spjdvdev_dtl_sync(vdev_t *vd, uint64_t txg) 1228168404Spjd{ 1229168404Spjd spa_t *spa = vd->vdev_spa; 1230168404Spjd space_map_obj_t *smo = &vd->vdev_dtl; 1231168404Spjd space_map_t *sm = &vd->vdev_dtl_map; 1232168404Spjd objset_t *mos = spa->spa_meta_objset; 1233168404Spjd space_map_t smsync; 1234168404Spjd kmutex_t smlock; 1235168404Spjd dmu_buf_t *db; 1236168404Spjd dmu_tx_t *tx; 1237168404Spjd 1238168404Spjd dprintf("%s in txg %llu pass %d\n", 1239168404Spjd vdev_description(vd), (u_longlong_t)txg, spa_sync_pass(spa)); 1240168404Spjd 1241168404Spjd tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 1242168404Spjd 1243168404Spjd if (vd->vdev_detached) { 1244168404Spjd if (smo->smo_object != 0) { 1245168404Spjd int err = dmu_object_free(mos, smo->smo_object, tx); 1246168404Spjd ASSERT3U(err, ==, 0); 1247168404Spjd smo->smo_object = 0; 1248168404Spjd } 1249168404Spjd dmu_tx_commit(tx); 1250168404Spjd dprintf("detach %s committed in txg %llu\n", 1251168404Spjd vdev_description(vd), txg); 1252168404Spjd return; 1253168404Spjd } 1254168404Spjd 1255168404Spjd if (smo->smo_object == 0) { 1256168404Spjd ASSERT(smo->smo_objsize == 0); 1257168404Spjd ASSERT(smo->smo_alloc == 0); 1258168404Spjd smo->smo_object = dmu_object_alloc(mos, 1259168404Spjd DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, 1260168404Spjd DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); 1261168404Spjd ASSERT(smo->smo_object != 0); 1262168404Spjd vdev_config_dirty(vd->vdev_top); 1263168404Spjd } 1264168404Spjd 1265168404Spjd bzero(&smlock, sizeof(smlock)); 1266168404Spjd mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); 1267168404Spjd 1268168404Spjd space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, 1269168404Spjd &smlock); 1270168404Spjd 1271168404Spjd mutex_enter(&smlock); 1272168404Spjd 1273168404Spjd mutex_enter(&vd->vdev_dtl_lock); 1274168404Spjd space_map_walk(sm, space_map_add, &smsync); 1275168404Spjd mutex_exit(&vd->vdev_dtl_lock); 1276168404Spjd 1277168404Spjd space_map_truncate(smo, mos, tx); 1278168404Spjd space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); 1279168404Spjd 1280168404Spjd space_map_destroy(&smsync); 1281168404Spjd 1282168404Spjd mutex_exit(&smlock); 1283168404Spjd mutex_destroy(&smlock); 1284168404Spjd 1285168404Spjd VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); 1286168404Spjd dmu_buf_will_dirty(db, tx); 1287168404Spjd ASSERT3U(db->db_size, ==, sizeof (*smo)); 1288168404Spjd bcopy(smo, db->db_data, db->db_size); 1289168404Spjd dmu_buf_rele(db, FTAG); 1290168404Spjd 1291168404Spjd dmu_tx_commit(tx); 1292168404Spjd} 1293168404Spjd 1294168404Spjdvoid 1295168404Spjdvdev_load(vdev_t *vd) 1296168404Spjd{ 1297168404Spjd int c; 1298168404Spjd 1299168404Spjd /* 1300168404Spjd * Recursively load all children. 1301168404Spjd */ 1302168404Spjd for (c = 0; c < vd->vdev_children; c++) 1303168404Spjd vdev_load(vd->vdev_child[c]); 1304168404Spjd 1305168404Spjd /* 1306168404Spjd * If this is a top-level vdev, initialize its metaslabs. 1307168404Spjd */ 1308168404Spjd if (vd == vd->vdev_top && 1309168404Spjd (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || 1310168404Spjd vdev_metaslab_init(vd, 0) != 0)) 1311168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1312168404Spjd VDEV_AUX_CORRUPT_DATA); 1313168404Spjd 1314168404Spjd /* 1315168404Spjd * If this is a leaf vdev, load its DTL. 1316168404Spjd */ 1317168404Spjd if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) 1318168404Spjd vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1319168404Spjd VDEV_AUX_CORRUPT_DATA); 1320168404Spjd} 1321168404Spjd 1322168404Spjd/* 1323168404Spjd * This special case of vdev_spare() is used for hot spares. It's sole purpose 1324168404Spjd * it to set the vdev state for the associated vdev. To do this, we make sure 1325168404Spjd * that we can open the underlying device, then try to read the label, and make 1326168404Spjd * sure that the label is sane and that it hasn't been repurposed to another 1327168404Spjd * pool. 1328168404Spjd */ 1329168404Spjdint 1330168404Spjdvdev_validate_spare(vdev_t *vd) 1331168404Spjd{ 1332168404Spjd nvlist_t *label; 1333168404Spjd uint64_t guid, version; 1334168404Spjd uint64_t state; 1335168404Spjd 1336168404Spjd if ((label = vdev_label_read_config(vd)) == NULL) { 1337168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1338168404Spjd VDEV_AUX_CORRUPT_DATA); 1339168404Spjd return (-1); 1340168404Spjd } 1341168404Spjd 1342168404Spjd if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || 1343168404Spjd version > ZFS_VERSION || 1344168404Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || 1345168404Spjd guid != vd->vdev_guid || 1346168404Spjd nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { 1347168404Spjd vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1348168404Spjd VDEV_AUX_CORRUPT_DATA); 1349168404Spjd nvlist_free(label); 1350168404Spjd return (-1); 1351168404Spjd } 1352168404Spjd 1353168404Spjd spa_spare_add(vd); 1354168404Spjd 1355168404Spjd /* 1356168404Spjd * We don't actually check the pool state here. If it's in fact in 1357168404Spjd * use by another pool, we update this fact on the fly when requested. 1358168404Spjd */ 1359168404Spjd nvlist_free(label); 1360168404Spjd return (0); 1361168404Spjd} 1362168404Spjd 1363168404Spjdvoid 1364168404Spjdvdev_sync_done(vdev_t *vd, uint64_t txg) 1365168404Spjd{ 1366168404Spjd metaslab_t *msp; 1367168404Spjd 1368168404Spjd dprintf("%s txg %llu\n", vdev_description(vd), txg); 1369168404Spjd 1370168404Spjd while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) 1371168404Spjd metaslab_sync_done(msp, txg); 1372168404Spjd} 1373168404Spjd 1374168404Spjdvoid 1375168404Spjdvdev_sync(vdev_t *vd, uint64_t txg) 1376168404Spjd{ 1377168404Spjd spa_t *spa = vd->vdev_spa; 1378168404Spjd vdev_t *lvd; 1379168404Spjd metaslab_t *msp; 1380168404Spjd dmu_tx_t *tx; 1381168404Spjd 1382168404Spjd dprintf("%s txg %llu pass %d\n", 1383168404Spjd vdev_description(vd), (u_longlong_t)txg, spa_sync_pass(spa)); 1384168404Spjd 1385168404Spjd if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { 1386168404Spjd ASSERT(vd == vd->vdev_top); 1387168404Spjd tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 1388168404Spjd vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, 1389168404Spjd DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); 1390168404Spjd ASSERT(vd->vdev_ms_array != 0); 1391168404Spjd vdev_config_dirty(vd); 1392168404Spjd dmu_tx_commit(tx); 1393168404Spjd } 1394168404Spjd 1395168404Spjd while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { 1396168404Spjd metaslab_sync(msp, txg); 1397168404Spjd (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); 1398168404Spjd } 1399168404Spjd 1400168404Spjd while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) 1401168404Spjd vdev_dtl_sync(lvd, txg); 1402168404Spjd 1403168404Spjd (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); 1404168404Spjd} 1405168404Spjd 1406168404Spjduint64_t 1407168404Spjdvdev_psize_to_asize(vdev_t *vd, uint64_t psize) 1408168404Spjd{ 1409168404Spjd return (vd->vdev_ops->vdev_op_asize(vd, psize)); 1410168404Spjd} 1411168404Spjd 1412168404Spjdvoid 1413168404Spjdvdev_io_start(zio_t *zio) 1414168404Spjd{ 1415168404Spjd zio->io_vd->vdev_ops->vdev_op_io_start(zio); 1416168404Spjd} 1417168404Spjd 1418168404Spjdvoid 1419168404Spjdvdev_io_done(zio_t *zio) 1420168404Spjd{ 1421168404Spjd zio->io_vd->vdev_ops->vdev_op_io_done(zio); 1422168404Spjd} 1423168404Spjd 1424168404Spjdconst char * 1425168404Spjdvdev_description(vdev_t *vd) 1426168404Spjd{ 1427168404Spjd if (vd == NULL || vd->vdev_ops == NULL) 1428168404Spjd return ("<unknown>"); 1429168404Spjd 1430168404Spjd if (vd->vdev_path != NULL) 1431168404Spjd return (vd->vdev_path); 1432168404Spjd 1433168404Spjd if (vd->vdev_parent == NULL) 1434168404Spjd return (spa_name(vd->vdev_spa)); 1435168404Spjd 1436168404Spjd return (vd->vdev_ops->vdev_op_type); 1437168404Spjd} 1438168404Spjd 1439168404Spjdint 1440168404Spjdvdev_online(spa_t *spa, uint64_t guid) 1441168404Spjd{ 1442168404Spjd vdev_t *rvd, *vd; 1443168404Spjd uint64_t txg; 1444168404Spjd 1445168404Spjd txg = spa_vdev_enter(spa); 1446168404Spjd 1447168404Spjd rvd = spa->spa_root_vdev; 1448168404Spjd 1449168404Spjd if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) 1450168404Spjd return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 1451168404Spjd 1452168404Spjd if (!vd->vdev_ops->vdev_op_leaf) 1453168404Spjd return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 1454168404Spjd 1455168404Spjd dprintf("ONLINE: %s\n", vdev_description(vd)); 1456168404Spjd 1457168404Spjd vd->vdev_offline = B_FALSE; 1458168404Spjd vd->vdev_tmpoffline = B_FALSE; 1459168404Spjd vdev_reopen(vd->vdev_top); 1460168404Spjd 1461168404Spjd vdev_config_dirty(vd->vdev_top); 1462168404Spjd 1463168404Spjd (void) spa_vdev_exit(spa, NULL, txg, 0); 1464168404Spjd 1465168404Spjd VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); 1466168404Spjd 1467168404Spjd return (0); 1468168404Spjd} 1469168404Spjd 1470168404Spjdint 1471168404Spjdvdev_offline(spa_t *spa, uint64_t guid, int istmp) 1472168404Spjd{ 1473168404Spjd vdev_t *rvd, *vd; 1474168404Spjd uint64_t txg; 1475168404Spjd 1476168404Spjd txg = spa_vdev_enter(spa); 1477168404Spjd 1478168404Spjd rvd = spa->spa_root_vdev; 1479168404Spjd 1480168404Spjd if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) 1481168404Spjd return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 1482168404Spjd 1483168404Spjd if (!vd->vdev_ops->vdev_op_leaf) 1484168404Spjd return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 1485168404Spjd 1486168404Spjd dprintf("OFFLINE: %s\n", vdev_description(vd)); 1487168404Spjd 1488168404Spjd /* 1489168404Spjd * If the device isn't already offline, try to offline it. 1490168404Spjd */ 1491168404Spjd if (!vd->vdev_offline) { 1492168404Spjd /* 1493168404Spjd * If this device's top-level vdev has a non-empty DTL, 1494168404Spjd * don't allow the device to be offlined. 1495168404Spjd * 1496168404Spjd * XXX -- make this more precise by allowing the offline 1497168404Spjd * as long as the remaining devices don't have any DTL holes. 1498168404Spjd */ 1499168404Spjd if (vd->vdev_top->vdev_dtl_map.sm_space != 0) 1500168404Spjd return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 1501168404Spjd 1502168404Spjd /* 1503168404Spjd * Offline this device and reopen its top-level vdev. 1504168404Spjd * If this action results in the top-level vdev becoming 1505168404Spjd * unusable, undo it and fail the request. 1506168404Spjd */ 1507168404Spjd vd->vdev_offline = B_TRUE; 1508168404Spjd vdev_reopen(vd->vdev_top); 1509168404Spjd if (vdev_is_dead(vd->vdev_top)) { 1510168404Spjd vd->vdev_offline = B_FALSE; 1511168404Spjd vdev_reopen(vd->vdev_top); 1512168404Spjd return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 1513168404Spjd } 1514168404Spjd } 1515168404Spjd 1516168404Spjd vd->vdev_tmpoffline = istmp; 1517168404Spjd 1518168404Spjd vdev_config_dirty(vd->vdev_top); 1519168404Spjd 1520168404Spjd return (spa_vdev_exit(spa, NULL, txg, 0)); 1521168404Spjd} 1522168404Spjd 1523168404Spjd/* 1524168404Spjd * Clear the error counts associated with this vdev. Unlike vdev_online() and 1525168404Spjd * vdev_offline(), we assume the spa config is locked. We also clear all 1526168404Spjd * children. If 'vd' is NULL, then the user wants to clear all vdevs. 1527168404Spjd */ 1528168404Spjdvoid 1529168404Spjdvdev_clear(spa_t *spa, vdev_t *vd) 1530168404Spjd{ 1531168404Spjd int c; 1532168404Spjd 1533168404Spjd if (vd == NULL) 1534168404Spjd vd = spa->spa_root_vdev; 1535168404Spjd 1536168404Spjd vd->vdev_stat.vs_read_errors = 0; 1537168404Spjd vd->vdev_stat.vs_write_errors = 0; 1538168404Spjd vd->vdev_stat.vs_checksum_errors = 0; 1539168404Spjd 1540168404Spjd for (c = 0; c < vd->vdev_children; c++) 1541168404Spjd vdev_clear(spa, vd->vdev_child[c]); 1542168404Spjd} 1543168404Spjd 1544168404Spjdint 1545168404Spjdvdev_is_dead(vdev_t *vd) 1546168404Spjd{ 1547168404Spjd return (vd->vdev_state <= VDEV_STATE_CANT_OPEN); 1548168404Spjd} 1549168404Spjd 1550168404Spjdint 1551168404Spjdvdev_error_inject(vdev_t *vd, zio_t *zio) 1552168404Spjd{ 1553168404Spjd int error = 0; 1554168404Spjd 1555168404Spjd if (vd->vdev_fault_mode == VDEV_FAULT_NONE) 1556168404Spjd return (0); 1557168404Spjd 1558168404Spjd if (((1ULL << zio->io_type) & vd->vdev_fault_mask) == 0) 1559168404Spjd return (0); 1560168404Spjd 1561168404Spjd switch (vd->vdev_fault_mode) { 1562168404Spjd case VDEV_FAULT_RANDOM: 1563168404Spjd if (spa_get_random(vd->vdev_fault_arg) == 0) 1564168404Spjd error = EIO; 1565168404Spjd break; 1566168404Spjd 1567168404Spjd case VDEV_FAULT_COUNT: 1568168404Spjd if ((int64_t)--vd->vdev_fault_arg <= 0) 1569168404Spjd vd->vdev_fault_mode = VDEV_FAULT_NONE; 1570168404Spjd error = EIO; 1571168404Spjd break; 1572168404Spjd } 1573168404Spjd 1574168404Spjd if (error != 0) { 1575168404Spjd dprintf("returning %d for type %d on %s state %d offset %llx\n", 1576168404Spjd error, zio->io_type, vdev_description(vd), 1577168404Spjd vd->vdev_state, zio->io_offset); 1578168404Spjd } 1579168404Spjd 1580168404Spjd return (error); 1581168404Spjd} 1582168404Spjd 1583168404Spjd/* 1584168404Spjd * Get statistics for the given vdev. 1585168404Spjd */ 1586168404Spjdvoid 1587168404Spjdvdev_get_stats(vdev_t *vd, vdev_stat_t *vs) 1588168404Spjd{ 1589168404Spjd vdev_t *rvd = vd->vdev_spa->spa_root_vdev; 1590168404Spjd int c, t; 1591168404Spjd 1592168404Spjd mutex_enter(&vd->vdev_stat_lock); 1593168404Spjd bcopy(&vd->vdev_stat, vs, sizeof (*vs)); 1594168404Spjd vs->vs_timestamp = gethrtime() - vs->vs_timestamp; 1595168404Spjd vs->vs_state = vd->vdev_state; 1596168404Spjd vs->vs_rsize = vdev_get_rsize(vd); 1597168404Spjd mutex_exit(&vd->vdev_stat_lock); 1598168404Spjd 1599168404Spjd /* 1600168404Spjd * If we're getting stats on the root vdev, aggregate the I/O counts 1601168404Spjd * over all top-level vdevs (i.e. the direct children of the root). 1602168404Spjd */ 1603168404Spjd if (vd == rvd) { 1604168404Spjd for (c = 0; c < rvd->vdev_children; c++) { 1605168404Spjd vdev_t *cvd = rvd->vdev_child[c]; 1606168404Spjd vdev_stat_t *cvs = &cvd->vdev_stat; 1607168404Spjd 1608168404Spjd mutex_enter(&vd->vdev_stat_lock); 1609168404Spjd for (t = 0; t < ZIO_TYPES; t++) { 1610168404Spjd vs->vs_ops[t] += cvs->vs_ops[t]; 1611168404Spjd vs->vs_bytes[t] += cvs->vs_bytes[t]; 1612168404Spjd } 1613168404Spjd vs->vs_read_errors += cvs->vs_read_errors; 1614168404Spjd vs->vs_write_errors += cvs->vs_write_errors; 1615168404Spjd vs->vs_checksum_errors += cvs->vs_checksum_errors; 1616168404Spjd vs->vs_scrub_examined += cvs->vs_scrub_examined; 1617168404Spjd vs->vs_scrub_errors += cvs->vs_scrub_errors; 1618168404Spjd mutex_exit(&vd->vdev_stat_lock); 1619168404Spjd } 1620168404Spjd } 1621168404Spjd} 1622168404Spjd 1623168404Spjdvoid 1624168404Spjdvdev_stat_update(zio_t *zio) 1625168404Spjd{ 1626168404Spjd vdev_t *vd = zio->io_vd; 1627168404Spjd vdev_t *pvd; 1628168404Spjd uint64_t txg = zio->io_txg; 1629168404Spjd vdev_stat_t *vs = &vd->vdev_stat; 1630168404Spjd zio_type_t type = zio->io_type; 1631168404Spjd int flags = zio->io_flags; 1632168404Spjd 1633168404Spjd if (zio->io_error == 0) { 1634168404Spjd if (!(flags & ZIO_FLAG_IO_BYPASS)) { 1635168404Spjd mutex_enter(&vd->vdev_stat_lock); 1636168404Spjd vs->vs_ops[type]++; 1637168404Spjd vs->vs_bytes[type] += zio->io_size; 1638168404Spjd mutex_exit(&vd->vdev_stat_lock); 1639168404Spjd } 1640168404Spjd if ((flags & ZIO_FLAG_IO_REPAIR) && 1641168404Spjd zio->io_delegate_list == NULL) { 1642168404Spjd mutex_enter(&vd->vdev_stat_lock); 1643168404Spjd if (flags & ZIO_FLAG_SCRUB_THREAD) 1644168404Spjd vs->vs_scrub_repaired += zio->io_size; 1645168404Spjd else 1646168404Spjd vs->vs_self_healed += zio->io_size; 1647168404Spjd mutex_exit(&vd->vdev_stat_lock); 1648168404Spjd } 1649168404Spjd return; 1650168404Spjd } 1651168404Spjd 1652168404Spjd if (flags & ZIO_FLAG_SPECULATIVE) 1653168404Spjd return; 1654168404Spjd 1655168404Spjd if (!vdev_is_dead(vd)) { 1656168404Spjd mutex_enter(&vd->vdev_stat_lock); 1657168404Spjd if (type == ZIO_TYPE_READ) { 1658168404Spjd if (zio->io_error == ECKSUM) 1659168404Spjd vs->vs_checksum_errors++; 1660168404Spjd else 1661168404Spjd vs->vs_read_errors++; 1662168404Spjd } 1663168404Spjd if (type == ZIO_TYPE_WRITE) 1664168404Spjd vs->vs_write_errors++; 1665168404Spjd mutex_exit(&vd->vdev_stat_lock); 1666168404Spjd } 1667168404Spjd 1668168404Spjd if (type == ZIO_TYPE_WRITE) { 1669168404Spjd if (txg == 0 || vd->vdev_children != 0) 1670168404Spjd return; 1671168404Spjd if (flags & ZIO_FLAG_SCRUB_THREAD) { 1672168404Spjd ASSERT(flags & ZIO_FLAG_IO_REPAIR); 1673168404Spjd for (pvd = vd; pvd != NULL; pvd = pvd->vdev_parent) 1674168404Spjd vdev_dtl_dirty(&pvd->vdev_dtl_scrub, txg, 1); 1675168404Spjd } 1676168404Spjd if (!(flags & ZIO_FLAG_IO_REPAIR)) { 1677168404Spjd if (vdev_dtl_contains(&vd->vdev_dtl_map, txg, 1)) 1678168404Spjd return; 1679168404Spjd vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); 1680168404Spjd for (pvd = vd; pvd != NULL; pvd = pvd->vdev_parent) 1681168404Spjd vdev_dtl_dirty(&pvd->vdev_dtl_map, txg, 1); 1682168404Spjd } 1683168404Spjd } 1684168404Spjd} 1685168404Spjd 1686168404Spjdvoid 1687168404Spjdvdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, boolean_t complete) 1688168404Spjd{ 1689168404Spjd int c; 1690168404Spjd vdev_stat_t *vs = &vd->vdev_stat; 1691168404Spjd 1692168404Spjd for (c = 0; c < vd->vdev_children; c++) 1693168404Spjd vdev_scrub_stat_update(vd->vdev_child[c], type, complete); 1694168404Spjd 1695168404Spjd mutex_enter(&vd->vdev_stat_lock); 1696168404Spjd 1697168404Spjd if (type == POOL_SCRUB_NONE) { 1698168404Spjd /* 1699168404Spjd * Update completion and end time. Leave everything else alone 1700168404Spjd * so we can report what happened during the previous scrub. 1701168404Spjd */ 1702168404Spjd vs->vs_scrub_complete = complete; 1703168404Spjd vs->vs_scrub_end = gethrestime_sec(); 1704168404Spjd } else { 1705168404Spjd vs->vs_scrub_type = type; 1706168404Spjd vs->vs_scrub_complete = 0; 1707168404Spjd vs->vs_scrub_examined = 0; 1708168404Spjd vs->vs_scrub_repaired = 0; 1709168404Spjd vs->vs_scrub_errors = 0; 1710168404Spjd vs->vs_scrub_start = gethrestime_sec(); 1711168404Spjd vs->vs_scrub_end = 0; 1712168404Spjd } 1713168404Spjd 1714168404Spjd mutex_exit(&vd->vdev_stat_lock); 1715168404Spjd} 1716168404Spjd 1717168404Spjd/* 1718168404Spjd * Update the in-core space usage stats for this vdev and the root vdev. 1719168404Spjd */ 1720168404Spjdvoid 1721168404Spjdvdev_space_update(vdev_t *vd, int64_t space_delta, int64_t alloc_delta) 1722168404Spjd{ 1723168404Spjd ASSERT(vd == vd->vdev_top); 1724168404Spjd int64_t dspace_delta = space_delta; 1725168404Spjd 1726168404Spjd do { 1727168404Spjd if (vd->vdev_ms_count) { 1728168404Spjd /* 1729168404Spjd * If this is a top-level vdev, apply the 1730168404Spjd * inverse of its psize-to-asize (ie. RAID-Z) 1731168404Spjd * space-expansion factor. We must calculate 1732168404Spjd * this here and not at the root vdev because 1733168404Spjd * the root vdev's psize-to-asize is simply the 1734168404Spjd * max of its childrens', thus not accurate 1735168404Spjd * enough for us. 1736168404Spjd */ 1737168404Spjd ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); 1738168404Spjd dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * 1739168404Spjd vd->vdev_deflate_ratio; 1740168404Spjd } 1741168404Spjd 1742168404Spjd mutex_enter(&vd->vdev_stat_lock); 1743168404Spjd vd->vdev_stat.vs_space += space_delta; 1744168404Spjd vd->vdev_stat.vs_alloc += alloc_delta; 1745168404Spjd vd->vdev_stat.vs_dspace += dspace_delta; 1746168404Spjd mutex_exit(&vd->vdev_stat_lock); 1747168404Spjd } while ((vd = vd->vdev_parent) != NULL); 1748168404Spjd} 1749168404Spjd 1750168404Spjd/* 1751168404Spjd * Mark a top-level vdev's config as dirty, placing it on the dirty list 1752168404Spjd * so that it will be written out next time the vdev configuration is synced. 1753168404Spjd * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. 1754168404Spjd */ 1755168404Spjdvoid 1756168404Spjdvdev_config_dirty(vdev_t *vd) 1757168404Spjd{ 1758168404Spjd spa_t *spa = vd->vdev_spa; 1759168404Spjd vdev_t *rvd = spa->spa_root_vdev; 1760168404Spjd int c; 1761168404Spjd 1762168404Spjd /* 1763168404Spjd * The dirty list is protected by the config lock. The caller must 1764168404Spjd * either hold the config lock as writer, or must be the sync thread 1765168404Spjd * (which holds the lock as reader). There's only one sync thread, 1766168404Spjd * so this is sufficient to ensure mutual exclusion. 1767168404Spjd */ 1768168404Spjd ASSERT(spa_config_held(spa, RW_WRITER) || 1769168404Spjd dsl_pool_sync_context(spa_get_dsl(spa))); 1770168404Spjd 1771168404Spjd if (vd == rvd) { 1772168404Spjd for (c = 0; c < rvd->vdev_children; c++) 1773168404Spjd vdev_config_dirty(rvd->vdev_child[c]); 1774168404Spjd } else { 1775168404Spjd ASSERT(vd == vd->vdev_top); 1776168404Spjd 1777168404Spjd if (!list_link_active(&vd->vdev_dirty_node)) 1778168404Spjd list_insert_head(&spa->spa_dirty_list, vd); 1779168404Spjd } 1780168404Spjd} 1781168404Spjd 1782168404Spjdvoid 1783168404Spjdvdev_config_clean(vdev_t *vd) 1784168404Spjd{ 1785168404Spjd spa_t *spa = vd->vdev_spa; 1786168404Spjd 1787168404Spjd ASSERT(spa_config_held(spa, RW_WRITER) || 1788168404Spjd dsl_pool_sync_context(spa_get_dsl(spa))); 1789168404Spjd 1790168404Spjd ASSERT(list_link_active(&vd->vdev_dirty_node)); 1791168404Spjd list_remove(&spa->spa_dirty_list, vd); 1792168404Spjd} 1793168404Spjd 1794168404Spjdvoid 1795168404Spjdvdev_propagate_state(vdev_t *vd) 1796168404Spjd{ 1797168404Spjd vdev_t *rvd = vd->vdev_spa->spa_root_vdev; 1798168404Spjd int degraded = 0, faulted = 0; 1799168404Spjd int corrupted = 0; 1800168404Spjd int c; 1801168404Spjd vdev_t *child; 1802168404Spjd 1803168404Spjd for (c = 0; c < vd->vdev_children; c++) { 1804168404Spjd child = vd->vdev_child[c]; 1805168404Spjd if (child->vdev_state <= VDEV_STATE_CANT_OPEN) 1806168404Spjd faulted++; 1807168404Spjd else if (child->vdev_state == VDEV_STATE_DEGRADED) 1808168404Spjd degraded++; 1809168404Spjd 1810168404Spjd if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) 1811168404Spjd corrupted++; 1812168404Spjd } 1813168404Spjd 1814168404Spjd vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); 1815168404Spjd 1816168404Spjd /* 1817168404Spjd * Root special: if there is a toplevel vdev that cannot be 1818168404Spjd * opened due to corrupted metadata, then propagate the root 1819168404Spjd * vdev's aux state as 'corrupt' rather than 'insufficient 1820168404Spjd * replicas'. 1821168404Spjd */ 1822168404Spjd if (corrupted && vd == rvd && rvd->vdev_state == VDEV_STATE_CANT_OPEN) 1823168404Spjd vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, 1824168404Spjd VDEV_AUX_CORRUPT_DATA); 1825168404Spjd} 1826168404Spjd 1827168404Spjd/* 1828168404Spjd * Set a vdev's state. If this is during an open, we don't update the parent 1829168404Spjd * state, because we're in the process of opening children depth-first. 1830168404Spjd * Otherwise, we propagate the change to the parent. 1831168404Spjd * 1832168404Spjd * If this routine places a device in a faulted state, an appropriate ereport is 1833168404Spjd * generated. 1834168404Spjd */ 1835168404Spjdvoid 1836168404Spjdvdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) 1837168404Spjd{ 1838168404Spjd uint64_t save_state; 1839168404Spjd 1840168404Spjd if (state == vd->vdev_state) { 1841168404Spjd vd->vdev_stat.vs_aux = aux; 1842168404Spjd return; 1843168404Spjd } 1844168404Spjd 1845168404Spjd save_state = vd->vdev_state; 1846168404Spjd 1847168404Spjd vd->vdev_state = state; 1848168404Spjd vd->vdev_stat.vs_aux = aux; 1849168404Spjd 1850168404Spjd if (state == VDEV_STATE_CANT_OPEN) { 1851168404Spjd /* 1852168404Spjd * If we fail to open a vdev during an import, we mark it as 1853168404Spjd * "not available", which signifies that it was never there to 1854168404Spjd * begin with. Failure to open such a device is not considered 1855168404Spjd * an error. 1856168404Spjd */ 1857168404Spjd if (vd->vdev_spa->spa_load_state == SPA_LOAD_IMPORT && 1858168404Spjd vd->vdev_ops->vdev_op_leaf) 1859168404Spjd vd->vdev_not_present = 1; 1860168404Spjd 1861168404Spjd /* 1862168404Spjd * Post the appropriate ereport. If the 'prevstate' field is 1863168404Spjd * set to something other than VDEV_STATE_UNKNOWN, it indicates 1864168404Spjd * that this is part of a vdev_reopen(). In this case, we don't 1865168404Spjd * want to post the ereport if the device was already in the 1866168404Spjd * CANT_OPEN state beforehand. 1867168404Spjd */ 1868168404Spjd if (vd->vdev_prevstate != state && !vd->vdev_not_present && 1869168404Spjd vd != vd->vdev_spa->spa_root_vdev) { 1870168404Spjd const char *class; 1871168404Spjd 1872168404Spjd switch (aux) { 1873168404Spjd case VDEV_AUX_OPEN_FAILED: 1874168404Spjd class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; 1875168404Spjd break; 1876168404Spjd case VDEV_AUX_CORRUPT_DATA: 1877168404Spjd class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; 1878168404Spjd break; 1879168404Spjd case VDEV_AUX_NO_REPLICAS: 1880168404Spjd class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; 1881168404Spjd break; 1882168404Spjd case VDEV_AUX_BAD_GUID_SUM: 1883168404Spjd class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; 1884168404Spjd break; 1885168404Spjd case VDEV_AUX_TOO_SMALL: 1886168404Spjd class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; 1887168404Spjd break; 1888168404Spjd case VDEV_AUX_BAD_LABEL: 1889168404Spjd class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; 1890168404Spjd break; 1891168404Spjd default: 1892168404Spjd class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; 1893168404Spjd } 1894168404Spjd 1895168404Spjd zfs_ereport_post(class, vd->vdev_spa, 1896168404Spjd vd, NULL, save_state, 0); 1897168404Spjd } 1898168404Spjd } 1899168404Spjd 1900168404Spjd if (isopen) 1901168404Spjd return; 1902168404Spjd 1903168404Spjd if (vd->vdev_parent != NULL) 1904168404Spjd vdev_propagate_state(vd->vdev_parent); 1905168404Spjd} 1906