1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5441d80aaSlling * Common Development and Distribution License (the "License"). 6441d80aaSlling * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 2199653d4eSeschrock 22fa9e4066Sahrens /* 23a3f829aeSBill Moore * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24fa9e4066Sahrens * Use is subject to license terms. 25fa9e4066Sahrens */ 26fa9e4066Sahrens 27fa9e4066Sahrens #include <sys/zfs_context.h> 28ea8dc4b6Seschrock #include <sys/fm/fs/zfs.h> 29fa9e4066Sahrens #include <sys/spa.h> 30fa9e4066Sahrens #include <sys/spa_impl.h> 31fa9e4066Sahrens #include <sys/dmu.h> 32fa9e4066Sahrens #include <sys/dmu_tx.h> 33fa9e4066Sahrens #include <sys/vdev_impl.h> 34fa9e4066Sahrens #include <sys/uberblock_impl.h> 35fa9e4066Sahrens #include <sys/metaslab.h> 36fa9e4066Sahrens #include <sys/metaslab_impl.h> 37fa9e4066Sahrens #include <sys/space_map.h> 38fa9e4066Sahrens #include <sys/zio.h> 39fa9e4066Sahrens #include <sys/zap.h> 40fa9e4066Sahrens #include <sys/fs/zfs.h> 41c5904d13Seschrock #include <sys/arc.h> 42fa9e4066Sahrens 43fa9e4066Sahrens /* 44fa9e4066Sahrens * Virtual device management. 45fa9e4066Sahrens */ 46fa9e4066Sahrens 47fa9e4066Sahrens static vdev_ops_t *vdev_ops_table[] = { 48fa9e4066Sahrens &vdev_root_ops, 49fa9e4066Sahrens &vdev_raidz_ops, 50fa9e4066Sahrens &vdev_mirror_ops, 51fa9e4066Sahrens &vdev_replacing_ops, 5299653d4eSeschrock &vdev_spare_ops, 53fa9e4066Sahrens &vdev_disk_ops, 54fa9e4066Sahrens &vdev_file_ops, 55fa9e4066Sahrens &vdev_missing_ops, 56fa9e4066Sahrens NULL 57fa9e4066Sahrens }; 58fa9e4066Sahrens 59088f3894Sahrens /* maximum scrub/resilver I/O queue per leaf vdev */ 60088f3894Sahrens int zfs_scrub_limit = 10; 6105b2b3b8Smishra 62fa9e4066Sahrens /* 63fa9e4066Sahrens * Given a vdev type, return the appropriate ops vector. 64fa9e4066Sahrens */ 65fa9e4066Sahrens static vdev_ops_t * 66fa9e4066Sahrens vdev_getops(const char *type) 67fa9e4066Sahrens { 68fa9e4066Sahrens vdev_ops_t *ops, **opspp; 69fa9e4066Sahrens 70fa9e4066Sahrens for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) 71fa9e4066Sahrens if (strcmp(ops->vdev_op_type, type) == 0) 72fa9e4066Sahrens break; 73fa9e4066Sahrens 74fa9e4066Sahrens return (ops); 75fa9e4066Sahrens } 76fa9e4066Sahrens 77fa9e4066Sahrens /* 78fa9e4066Sahrens * Default asize function: return the MAX of psize with the asize of 79fa9e4066Sahrens * all children. This is what's used by anything other than RAID-Z. 80fa9e4066Sahrens */ 81fa9e4066Sahrens uint64_t 82fa9e4066Sahrens vdev_default_asize(vdev_t *vd, uint64_t psize) 83fa9e4066Sahrens { 84ecc2d604Sbonwick uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); 85fa9e4066Sahrens uint64_t csize; 86fa9e4066Sahrens uint64_t c; 87fa9e4066Sahrens 88fa9e4066Sahrens for (c = 0; c < vd->vdev_children; c++) { 89fa9e4066Sahrens csize = vdev_psize_to_asize(vd->vdev_child[c], psize); 90fa9e4066Sahrens asize = MAX(asize, csize); 91fa9e4066Sahrens } 92fa9e4066Sahrens 93fa9e4066Sahrens return (asize); 94fa9e4066Sahrens } 95fa9e4066Sahrens 962a79c5feSlling /* 972a79c5feSlling * Get the replaceable or attachable device size. 982a79c5feSlling * If the parent is a mirror or raidz, the replaceable size is the minimum 992a79c5feSlling * psize of all its children. For the rest, just return our own psize. 1002a79c5feSlling * 1012a79c5feSlling * e.g. 1022a79c5feSlling * psize rsize 1032a79c5feSlling * root - - 1042a79c5feSlling * mirror/raidz - - 1052a79c5feSlling * disk1 20g 20g 1062a79c5feSlling * disk2 40g 20g 1072a79c5feSlling * disk3 80g 80g 1082a79c5feSlling */ 1092a79c5feSlling uint64_t 1102a79c5feSlling vdev_get_rsize(vdev_t *vd) 1112a79c5feSlling { 1122a79c5feSlling vdev_t *pvd, *cvd; 1132a79c5feSlling uint64_t c, rsize; 1142a79c5feSlling 1152a79c5feSlling pvd = vd->vdev_parent; 1162a79c5feSlling 1172a79c5feSlling /* 1182a79c5feSlling * If our parent is NULL or the root, just return our own psize. 1192a79c5feSlling */ 1202a79c5feSlling if (pvd == NULL || pvd->vdev_parent == NULL) 1212a79c5feSlling return (vd->vdev_psize); 1222a79c5feSlling 1232a79c5feSlling rsize = 0; 1242a79c5feSlling 1252a79c5feSlling for (c = 0; c < pvd->vdev_children; c++) { 1262a79c5feSlling cvd = pvd->vdev_child[c]; 1272a79c5feSlling rsize = MIN(rsize - 1, cvd->vdev_psize - 1) + 1; 1282a79c5feSlling } 1292a79c5feSlling 1302a79c5feSlling return (rsize); 1312a79c5feSlling } 1322a79c5feSlling 133fa9e4066Sahrens vdev_t * 134fa9e4066Sahrens vdev_lookup_top(spa_t *spa, uint64_t vdev) 135fa9e4066Sahrens { 136fa9e4066Sahrens vdev_t *rvd = spa->spa_root_vdev; 137fa9e4066Sahrens 138e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 139e05725b1Sbonwick 140088f3894Sahrens if (vdev < rvd->vdev_children) { 141088f3894Sahrens ASSERT(rvd->vdev_child[vdev] != NULL); 142fa9e4066Sahrens return (rvd->vdev_child[vdev]); 143088f3894Sahrens } 144fa9e4066Sahrens 145fa9e4066Sahrens return (NULL); 146fa9e4066Sahrens } 147fa9e4066Sahrens 148fa9e4066Sahrens vdev_t * 149fa9e4066Sahrens vdev_lookup_by_guid(vdev_t *vd, uint64_t guid) 150fa9e4066Sahrens { 151fa9e4066Sahrens int c; 152fa9e4066Sahrens vdev_t *mvd; 153fa9e4066Sahrens 1540e34b6a7Sbonwick if (vd->vdev_guid == guid) 155fa9e4066Sahrens return (vd); 156fa9e4066Sahrens 157fa9e4066Sahrens for (c = 0; c < vd->vdev_children; c++) 158fa9e4066Sahrens if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != 159fa9e4066Sahrens NULL) 160fa9e4066Sahrens return (mvd); 161fa9e4066Sahrens 162fa9e4066Sahrens return (NULL); 163fa9e4066Sahrens } 164fa9e4066Sahrens 165fa9e4066Sahrens void 166fa9e4066Sahrens vdev_add_child(vdev_t *pvd, vdev_t *cvd) 167fa9e4066Sahrens { 168fa9e4066Sahrens size_t oldsize, newsize; 169fa9e4066Sahrens uint64_t id = cvd->vdev_id; 170fa9e4066Sahrens vdev_t **newchild; 171fa9e4066Sahrens 172e14bb325SJeff Bonwick ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 173fa9e4066Sahrens ASSERT(cvd->vdev_parent == NULL); 174fa9e4066Sahrens 175fa9e4066Sahrens cvd->vdev_parent = pvd; 176fa9e4066Sahrens 177fa9e4066Sahrens if (pvd == NULL) 178fa9e4066Sahrens return; 179fa9e4066Sahrens 180fa9e4066Sahrens ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); 181fa9e4066Sahrens 182fa9e4066Sahrens oldsize = pvd->vdev_children * sizeof (vdev_t *); 183fa9e4066Sahrens pvd->vdev_children = MAX(pvd->vdev_children, id + 1); 184fa9e4066Sahrens newsize = pvd->vdev_children * sizeof (vdev_t *); 185fa9e4066Sahrens 186fa9e4066Sahrens newchild = kmem_zalloc(newsize, KM_SLEEP); 187fa9e4066Sahrens if (pvd->vdev_child != NULL) { 188fa9e4066Sahrens bcopy(pvd->vdev_child, newchild, oldsize); 189fa9e4066Sahrens kmem_free(pvd->vdev_child, oldsize); 190fa9e4066Sahrens } 191fa9e4066Sahrens 192fa9e4066Sahrens pvd->vdev_child = newchild; 193fa9e4066Sahrens pvd->vdev_child[id] = cvd; 194fa9e4066Sahrens 195fa9e4066Sahrens cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); 196fa9e4066Sahrens ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); 197fa9e4066Sahrens 198fa9e4066Sahrens /* 199fa9e4066Sahrens * Walk up all ancestors to update guid sum. 200fa9e4066Sahrens */ 201fa9e4066Sahrens for (; pvd != NULL; pvd = pvd->vdev_parent) 202fa9e4066Sahrens pvd->vdev_guid_sum += cvd->vdev_guid_sum; 20305b2b3b8Smishra 20405b2b3b8Smishra if (cvd->vdev_ops->vdev_op_leaf) 20505b2b3b8Smishra cvd->vdev_spa->spa_scrub_maxinflight += zfs_scrub_limit; 206fa9e4066Sahrens } 207fa9e4066Sahrens 208fa9e4066Sahrens void 209fa9e4066Sahrens vdev_remove_child(vdev_t *pvd, vdev_t *cvd) 210fa9e4066Sahrens { 211fa9e4066Sahrens int c; 212fa9e4066Sahrens uint_t id = cvd->vdev_id; 213fa9e4066Sahrens 214fa9e4066Sahrens ASSERT(cvd->vdev_parent == pvd); 215fa9e4066Sahrens 216fa9e4066Sahrens if (pvd == NULL) 217fa9e4066Sahrens return; 218fa9e4066Sahrens 219fa9e4066Sahrens ASSERT(id < pvd->vdev_children); 220fa9e4066Sahrens ASSERT(pvd->vdev_child[id] == cvd); 221fa9e4066Sahrens 222fa9e4066Sahrens pvd->vdev_child[id] = NULL; 223fa9e4066Sahrens cvd->vdev_parent = NULL; 224fa9e4066Sahrens 225fa9e4066Sahrens for (c = 0; c < pvd->vdev_children; c++) 226fa9e4066Sahrens if (pvd->vdev_child[c]) 227fa9e4066Sahrens break; 228fa9e4066Sahrens 229fa9e4066Sahrens if (c == pvd->vdev_children) { 230fa9e4066Sahrens kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); 231fa9e4066Sahrens pvd->vdev_child = NULL; 232fa9e4066Sahrens pvd->vdev_children = 0; 233fa9e4066Sahrens } 234fa9e4066Sahrens 235fa9e4066Sahrens /* 236fa9e4066Sahrens * Walk up all ancestors to update guid sum. 237fa9e4066Sahrens */ 238fa9e4066Sahrens for (; pvd != NULL; pvd = pvd->vdev_parent) 239fa9e4066Sahrens pvd->vdev_guid_sum -= cvd->vdev_guid_sum; 24005b2b3b8Smishra 24105b2b3b8Smishra if (cvd->vdev_ops->vdev_op_leaf) 24205b2b3b8Smishra cvd->vdev_spa->spa_scrub_maxinflight -= zfs_scrub_limit; 243fa9e4066Sahrens } 244fa9e4066Sahrens 245fa9e4066Sahrens /* 246fa9e4066Sahrens * Remove any holes in the child array. 247fa9e4066Sahrens */ 248fa9e4066Sahrens void 249fa9e4066Sahrens vdev_compact_children(vdev_t *pvd) 250fa9e4066Sahrens { 251fa9e4066Sahrens vdev_t **newchild, *cvd; 252fa9e4066Sahrens int oldc = pvd->vdev_children; 253fa9e4066Sahrens int newc, c; 254fa9e4066Sahrens 255e14bb325SJeff Bonwick ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 256fa9e4066Sahrens 257fa9e4066Sahrens for (c = newc = 0; c < oldc; c++) 258fa9e4066Sahrens if (pvd->vdev_child[c]) 259fa9e4066Sahrens newc++; 260fa9e4066Sahrens 261fa9e4066Sahrens newchild = kmem_alloc(newc * sizeof (vdev_t *), KM_SLEEP); 262fa9e4066Sahrens 263fa9e4066Sahrens for (c = newc = 0; c < oldc; c++) { 264fa9e4066Sahrens if ((cvd = pvd->vdev_child[c]) != NULL) { 265fa9e4066Sahrens newchild[newc] = cvd; 266fa9e4066Sahrens cvd->vdev_id = newc++; 267fa9e4066Sahrens } 268fa9e4066Sahrens } 269fa9e4066Sahrens 270fa9e4066Sahrens kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); 271fa9e4066Sahrens pvd->vdev_child = newchild; 272fa9e4066Sahrens pvd->vdev_children = newc; 273fa9e4066Sahrens } 274fa9e4066Sahrens 275fa9e4066Sahrens /* 276fa9e4066Sahrens * Allocate and minimally initialize a vdev_t. 277fa9e4066Sahrens */ 278fa9e4066Sahrens static vdev_t * 279fa9e4066Sahrens vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) 280fa9e4066Sahrens { 281fa9e4066Sahrens vdev_t *vd; 282fa9e4066Sahrens 283fa9e4066Sahrens vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP); 284fa9e4066Sahrens 2850e34b6a7Sbonwick if (spa->spa_root_vdev == NULL) { 2860e34b6a7Sbonwick ASSERT(ops == &vdev_root_ops); 2870e34b6a7Sbonwick spa->spa_root_vdev = vd; 2880e34b6a7Sbonwick } 2890e34b6a7Sbonwick 2900e34b6a7Sbonwick if (guid == 0) { 2910e34b6a7Sbonwick if (spa->spa_root_vdev == vd) { 2920e34b6a7Sbonwick /* 2930e34b6a7Sbonwick * The root vdev's guid will also be the pool guid, 2940e34b6a7Sbonwick * which must be unique among all pools. 2950e34b6a7Sbonwick */ 2960e34b6a7Sbonwick while (guid == 0 || spa_guid_exists(guid, 0)) 2970e34b6a7Sbonwick guid = spa_get_random(-1ULL); 2980e34b6a7Sbonwick } else { 2990e34b6a7Sbonwick /* 3000e34b6a7Sbonwick * Any other vdev's guid must be unique within the pool. 3010e34b6a7Sbonwick */ 3020e34b6a7Sbonwick while (guid == 0 || 3030e34b6a7Sbonwick spa_guid_exists(spa_guid(spa), guid)) 3040e34b6a7Sbonwick guid = spa_get_random(-1ULL); 3050e34b6a7Sbonwick } 3060e34b6a7Sbonwick ASSERT(!spa_guid_exists(spa_guid(spa), guid)); 3070e34b6a7Sbonwick } 3080e34b6a7Sbonwick 309fa9e4066Sahrens vd->vdev_spa = spa; 310fa9e4066Sahrens vd->vdev_id = id; 311fa9e4066Sahrens vd->vdev_guid = guid; 312fa9e4066Sahrens vd->vdev_guid_sum = guid; 313fa9e4066Sahrens vd->vdev_ops = ops; 314fa9e4066Sahrens vd->vdev_state = VDEV_STATE_CLOSED; 315fa9e4066Sahrens 316fa9e4066Sahrens mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_DEFAULT, NULL); 3175ad82045Snd mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); 318e14bb325SJeff Bonwick mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL); 3198ad4d6ddSJeff Bonwick for (int t = 0; t < DTL_TYPES; t++) { 3208ad4d6ddSJeff Bonwick space_map_create(&vd->vdev_dtl[t], 0, -1ULL, 0, 3218ad4d6ddSJeff Bonwick &vd->vdev_dtl_lock); 3228ad4d6ddSJeff Bonwick } 323fa9e4066Sahrens txg_list_create(&vd->vdev_ms_list, 324fa9e4066Sahrens offsetof(struct metaslab, ms_txg_node)); 325fa9e4066Sahrens txg_list_create(&vd->vdev_dtl_list, 326fa9e4066Sahrens offsetof(struct vdev, vdev_dtl_node)); 327fa9e4066Sahrens vd->vdev_stat.vs_timestamp = gethrtime(); 3283d7072f8Seschrock vdev_queue_init(vd); 3293d7072f8Seschrock vdev_cache_init(vd); 330fa9e4066Sahrens 331fa9e4066Sahrens return (vd); 332fa9e4066Sahrens } 333fa9e4066Sahrens 334fa9e4066Sahrens /* 335fa9e4066Sahrens * Allocate a new vdev. The 'alloctype' is used to control whether we are 336fa9e4066Sahrens * creating a new vdev or loading an existing one - the behavior is slightly 337fa9e4066Sahrens * different for each case. 338fa9e4066Sahrens */ 33999653d4eSeschrock int 34099653d4eSeschrock vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, 34199653d4eSeschrock int alloctype) 342fa9e4066Sahrens { 343fa9e4066Sahrens vdev_ops_t *ops; 344fa9e4066Sahrens char *type; 3458654d025Sperrin uint64_t guid = 0, islog, nparity; 346fa9e4066Sahrens vdev_t *vd; 347fa9e4066Sahrens 348e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 349fa9e4066Sahrens 350fa9e4066Sahrens if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) 35199653d4eSeschrock return (EINVAL); 352fa9e4066Sahrens 353fa9e4066Sahrens if ((ops = vdev_getops(type)) == NULL) 35499653d4eSeschrock return (EINVAL); 355fa9e4066Sahrens 356fa9e4066Sahrens /* 357fa9e4066Sahrens * If this is a load, get the vdev guid from the nvlist. 358fa9e4066Sahrens * Otherwise, vdev_alloc_common() will generate one for us. 359fa9e4066Sahrens */ 360fa9e4066Sahrens if (alloctype == VDEV_ALLOC_LOAD) { 361fa9e4066Sahrens uint64_t label_id; 362fa9e4066Sahrens 363fa9e4066Sahrens if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || 364fa9e4066Sahrens label_id != id) 36599653d4eSeschrock return (EINVAL); 366fa9e4066Sahrens 367fa9e4066Sahrens if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 36899653d4eSeschrock return (EINVAL); 36999653d4eSeschrock } else if (alloctype == VDEV_ALLOC_SPARE) { 37099653d4eSeschrock if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 37199653d4eSeschrock return (EINVAL); 372fa94a07fSbrendan } else if (alloctype == VDEV_ALLOC_L2CACHE) { 373fa94a07fSbrendan if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) 374fa94a07fSbrendan return (EINVAL); 375fa9e4066Sahrens } 376fa9e4066Sahrens 37799653d4eSeschrock /* 37899653d4eSeschrock * The first allocated vdev must be of type 'root'. 37999653d4eSeschrock */ 38099653d4eSeschrock if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) 38199653d4eSeschrock return (EINVAL); 38299653d4eSeschrock 3838654d025Sperrin /* 3848654d025Sperrin * Determine whether we're a log vdev. 3858654d025Sperrin */ 3868654d025Sperrin islog = 0; 3878654d025Sperrin (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); 388990b4856Slling if (islog && spa_version(spa) < SPA_VERSION_SLOGS) 3898654d025Sperrin return (ENOTSUP); 390fa9e4066Sahrens 39199653d4eSeschrock /* 3928654d025Sperrin * Set the nparity property for RAID-Z vdevs. 39399653d4eSeschrock */ 3948654d025Sperrin nparity = -1ULL; 39599653d4eSeschrock if (ops == &vdev_raidz_ops) { 39699653d4eSeschrock if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, 3978654d025Sperrin &nparity) == 0) { 39899653d4eSeschrock /* 39999653d4eSeschrock * Currently, we can only support 2 parity devices. 40099653d4eSeschrock */ 4018654d025Sperrin if (nparity == 0 || nparity > 2) 40299653d4eSeschrock return (EINVAL); 40399653d4eSeschrock /* 40499653d4eSeschrock * Older versions can only support 1 parity device. 40599653d4eSeschrock */ 4068654d025Sperrin if (nparity == 2 && 407e7437265Sahrens spa_version(spa) < SPA_VERSION_RAID6) 40899653d4eSeschrock return (ENOTSUP); 40999653d4eSeschrock } else { 41099653d4eSeschrock /* 41199653d4eSeschrock * We require the parity to be specified for SPAs that 41299653d4eSeschrock * support multiple parity levels. 41399653d4eSeschrock */ 414e7437265Sahrens if (spa_version(spa) >= SPA_VERSION_RAID6) 41599653d4eSeschrock return (EINVAL); 41699653d4eSeschrock /* 41799653d4eSeschrock * Otherwise, we default to 1 parity device for RAID-Z. 41899653d4eSeschrock */ 4198654d025Sperrin nparity = 1; 42099653d4eSeschrock } 42199653d4eSeschrock } else { 4228654d025Sperrin nparity = 0; 42399653d4eSeschrock } 4248654d025Sperrin ASSERT(nparity != -1ULL); 4258654d025Sperrin 4268654d025Sperrin vd = vdev_alloc_common(spa, id, guid, ops); 4278654d025Sperrin 4288654d025Sperrin vd->vdev_islog = islog; 4298654d025Sperrin vd->vdev_nparity = nparity; 4308654d025Sperrin 4318654d025Sperrin if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) 4328654d025Sperrin vd->vdev_path = spa_strdup(vd->vdev_path); 4338654d025Sperrin if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) 4348654d025Sperrin vd->vdev_devid = spa_strdup(vd->vdev_devid); 4358654d025Sperrin if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, 4368654d025Sperrin &vd->vdev_physpath) == 0) 4378654d025Sperrin vd->vdev_physpath = spa_strdup(vd->vdev_physpath); 438*6809eb4eSEric Schrock if (nvlist_lookup_string(nv, ZPOOL_CONFIG_FRU, &vd->vdev_fru) == 0) 439*6809eb4eSEric Schrock vd->vdev_fru = spa_strdup(vd->vdev_fru); 44099653d4eSeschrock 441afefbcddSeschrock /* 442afefbcddSeschrock * Set the whole_disk property. If it's not specified, leave the value 443afefbcddSeschrock * as -1. 444afefbcddSeschrock */ 445afefbcddSeschrock if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, 446afefbcddSeschrock &vd->vdev_wholedisk) != 0) 447afefbcddSeschrock vd->vdev_wholedisk = -1ULL; 448afefbcddSeschrock 449ea8dc4b6Seschrock /* 450ea8dc4b6Seschrock * Look for the 'not present' flag. This will only be set if the device 451ea8dc4b6Seschrock * was not present at the time of import. 452ea8dc4b6Seschrock */ 453*6809eb4eSEric Schrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, 454*6809eb4eSEric Schrock &vd->vdev_not_present); 455ea8dc4b6Seschrock 456ecc2d604Sbonwick /* 457ecc2d604Sbonwick * Get the alignment requirement. 458ecc2d604Sbonwick */ 459ecc2d604Sbonwick (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); 460ecc2d604Sbonwick 461fa9e4066Sahrens /* 462fa9e4066Sahrens * If we're a top-level vdev, try to load the allocation parameters. 463fa9e4066Sahrens */ 464fa9e4066Sahrens if (parent && !parent->vdev_parent && alloctype == VDEV_ALLOC_LOAD) { 465fa9e4066Sahrens (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, 466fa9e4066Sahrens &vd->vdev_ms_array); 467fa9e4066Sahrens (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, 468fa9e4066Sahrens &vd->vdev_ms_shift); 469fa9e4066Sahrens (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, 470fa9e4066Sahrens &vd->vdev_asize); 471fa9e4066Sahrens } 472fa9e4066Sahrens 473fa9e4066Sahrens /* 4743d7072f8Seschrock * If we're a leaf vdev, try to load the DTL object and other state. 475fa9e4066Sahrens */ 476c5904d13Seschrock if (vd->vdev_ops->vdev_op_leaf && 477c5904d13Seschrock (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE)) { 478c5904d13Seschrock if (alloctype == VDEV_ALLOC_LOAD) { 479c5904d13Seschrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, 4808ad4d6ddSJeff Bonwick &vd->vdev_dtl_smo.smo_object); 481c5904d13Seschrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, 482c5904d13Seschrock &vd->vdev_unspare); 483c5904d13Seschrock } 484ecc2d604Sbonwick (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, 485ecc2d604Sbonwick &vd->vdev_offline); 486c5904d13Seschrock 4873d7072f8Seschrock /* 4883d7072f8Seschrock * When importing a pool, we want to ignore the persistent fault 4893d7072f8Seschrock * state, as the diagnosis made on another system may not be 4903d7072f8Seschrock * valid in the current context. 4913d7072f8Seschrock */ 4923d7072f8Seschrock if (spa->spa_load_state == SPA_LOAD_OPEN) { 4933d7072f8Seschrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, 4943d7072f8Seschrock &vd->vdev_faulted); 4953d7072f8Seschrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, 4963d7072f8Seschrock &vd->vdev_degraded); 4973d7072f8Seschrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, 4983d7072f8Seschrock &vd->vdev_removed); 4993d7072f8Seschrock } 500fa9e4066Sahrens } 501fa9e4066Sahrens 502fa9e4066Sahrens /* 503fa9e4066Sahrens * Add ourselves to the parent's list of children. 504fa9e4066Sahrens */ 505fa9e4066Sahrens vdev_add_child(parent, vd); 506fa9e4066Sahrens 50799653d4eSeschrock *vdp = vd; 50899653d4eSeschrock 50999653d4eSeschrock return (0); 510fa9e4066Sahrens } 511fa9e4066Sahrens 512fa9e4066Sahrens void 513fa9e4066Sahrens vdev_free(vdev_t *vd) 514fa9e4066Sahrens { 515fa9e4066Sahrens int c; 5163d7072f8Seschrock spa_t *spa = vd->vdev_spa; 517fa9e4066Sahrens 518fa9e4066Sahrens /* 519fa9e4066Sahrens * vdev_free() implies closing the vdev first. This is simpler than 520fa9e4066Sahrens * trying to ensure complicated semantics for all callers. 521fa9e4066Sahrens */ 522fa9e4066Sahrens vdev_close(vd); 523fa9e4066Sahrens 524e14bb325SJeff Bonwick ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); 525fa9e4066Sahrens 526fa9e4066Sahrens /* 527fa9e4066Sahrens * Free all children. 528fa9e4066Sahrens */ 529fa9e4066Sahrens for (c = 0; c < vd->vdev_children; c++) 530fa9e4066Sahrens vdev_free(vd->vdev_child[c]); 531fa9e4066Sahrens 532fa9e4066Sahrens ASSERT(vd->vdev_child == NULL); 533fa9e4066Sahrens ASSERT(vd->vdev_guid_sum == vd->vdev_guid); 534fa9e4066Sahrens 535fa9e4066Sahrens /* 536fa9e4066Sahrens * Discard allocation state. 537fa9e4066Sahrens */ 538fa9e4066Sahrens if (vd == vd->vdev_top) 539fa9e4066Sahrens vdev_metaslab_fini(vd); 540fa9e4066Sahrens 541fa9e4066Sahrens ASSERT3U(vd->vdev_stat.vs_space, ==, 0); 54299653d4eSeschrock ASSERT3U(vd->vdev_stat.vs_dspace, ==, 0); 543fa9e4066Sahrens ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0); 544fa9e4066Sahrens 545fa9e4066Sahrens /* 546fa9e4066Sahrens * Remove this vdev from its parent's child list. 547fa9e4066Sahrens */ 548fa9e4066Sahrens vdev_remove_child(vd->vdev_parent, vd); 549fa9e4066Sahrens 550fa9e4066Sahrens ASSERT(vd->vdev_parent == NULL); 551fa9e4066Sahrens 5523d7072f8Seschrock /* 5533d7072f8Seschrock * Clean up vdev structure. 5543d7072f8Seschrock */ 5553d7072f8Seschrock vdev_queue_fini(vd); 5563d7072f8Seschrock vdev_cache_fini(vd); 5573d7072f8Seschrock 5583d7072f8Seschrock if (vd->vdev_path) 5593d7072f8Seschrock spa_strfree(vd->vdev_path); 5603d7072f8Seschrock if (vd->vdev_devid) 5613d7072f8Seschrock spa_strfree(vd->vdev_devid); 5623d7072f8Seschrock if (vd->vdev_physpath) 5633d7072f8Seschrock spa_strfree(vd->vdev_physpath); 564*6809eb4eSEric Schrock if (vd->vdev_fru) 565*6809eb4eSEric Schrock spa_strfree(vd->vdev_fru); 5663d7072f8Seschrock 5673d7072f8Seschrock if (vd->vdev_isspare) 5683d7072f8Seschrock spa_spare_remove(vd); 569fa94a07fSbrendan if (vd->vdev_isl2cache) 570fa94a07fSbrendan spa_l2cache_remove(vd); 5713d7072f8Seschrock 5723d7072f8Seschrock txg_list_destroy(&vd->vdev_ms_list); 5733d7072f8Seschrock txg_list_destroy(&vd->vdev_dtl_list); 5748ad4d6ddSJeff Bonwick 5753d7072f8Seschrock mutex_enter(&vd->vdev_dtl_lock); 5768ad4d6ddSJeff Bonwick for (int t = 0; t < DTL_TYPES; t++) { 5778ad4d6ddSJeff Bonwick space_map_unload(&vd->vdev_dtl[t]); 5788ad4d6ddSJeff Bonwick space_map_destroy(&vd->vdev_dtl[t]); 5798ad4d6ddSJeff Bonwick } 5803d7072f8Seschrock mutex_exit(&vd->vdev_dtl_lock); 5818ad4d6ddSJeff Bonwick 5823d7072f8Seschrock mutex_destroy(&vd->vdev_dtl_lock); 5833d7072f8Seschrock mutex_destroy(&vd->vdev_stat_lock); 584e14bb325SJeff Bonwick mutex_destroy(&vd->vdev_probe_lock); 5853d7072f8Seschrock 5863d7072f8Seschrock if (vd == spa->spa_root_vdev) 5873d7072f8Seschrock spa->spa_root_vdev = NULL; 5883d7072f8Seschrock 5893d7072f8Seschrock kmem_free(vd, sizeof (vdev_t)); 590fa9e4066Sahrens } 591fa9e4066Sahrens 592fa9e4066Sahrens /* 593fa9e4066Sahrens * Transfer top-level vdev state from svd to tvd. 594fa9e4066Sahrens */ 595fa9e4066Sahrens static void 596fa9e4066Sahrens vdev_top_transfer(vdev_t *svd, vdev_t *tvd) 597fa9e4066Sahrens { 598fa9e4066Sahrens spa_t *spa = svd->vdev_spa; 599fa9e4066Sahrens metaslab_t *msp; 600fa9e4066Sahrens vdev_t *vd; 601fa9e4066Sahrens int t; 602fa9e4066Sahrens 603fa9e4066Sahrens ASSERT(tvd == tvd->vdev_top); 604fa9e4066Sahrens 605fa9e4066Sahrens tvd->vdev_ms_array = svd->vdev_ms_array; 606fa9e4066Sahrens tvd->vdev_ms_shift = svd->vdev_ms_shift; 607fa9e4066Sahrens tvd->vdev_ms_count = svd->vdev_ms_count; 608fa9e4066Sahrens 609fa9e4066Sahrens svd->vdev_ms_array = 0; 610fa9e4066Sahrens svd->vdev_ms_shift = 0; 611fa9e4066Sahrens svd->vdev_ms_count = 0; 612fa9e4066Sahrens 613fa9e4066Sahrens tvd->vdev_mg = svd->vdev_mg; 614fa9e4066Sahrens tvd->vdev_ms = svd->vdev_ms; 615fa9e4066Sahrens 616fa9e4066Sahrens svd->vdev_mg = NULL; 617fa9e4066Sahrens svd->vdev_ms = NULL; 618ecc2d604Sbonwick 619ecc2d604Sbonwick if (tvd->vdev_mg != NULL) 620ecc2d604Sbonwick tvd->vdev_mg->mg_vd = tvd; 621fa9e4066Sahrens 622fa9e4066Sahrens tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; 623fa9e4066Sahrens tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; 62499653d4eSeschrock tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; 625fa9e4066Sahrens 626fa9e4066Sahrens svd->vdev_stat.vs_alloc = 0; 627fa9e4066Sahrens svd->vdev_stat.vs_space = 0; 62899653d4eSeschrock svd->vdev_stat.vs_dspace = 0; 629fa9e4066Sahrens 630fa9e4066Sahrens for (t = 0; t < TXG_SIZE; t++) { 631fa9e4066Sahrens while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) 632fa9e4066Sahrens (void) txg_list_add(&tvd->vdev_ms_list, msp, t); 633fa9e4066Sahrens while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) 634fa9e4066Sahrens (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); 635fa9e4066Sahrens if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) 636fa9e4066Sahrens (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); 637fa9e4066Sahrens } 638fa9e4066Sahrens 639e14bb325SJeff Bonwick if (list_link_active(&svd->vdev_config_dirty_node)) { 640fa9e4066Sahrens vdev_config_clean(svd); 641fa9e4066Sahrens vdev_config_dirty(tvd); 642fa9e4066Sahrens } 643fa9e4066Sahrens 644e14bb325SJeff Bonwick if (list_link_active(&svd->vdev_state_dirty_node)) { 645e14bb325SJeff Bonwick vdev_state_clean(svd); 646e14bb325SJeff Bonwick vdev_state_dirty(tvd); 647e14bb325SJeff Bonwick } 648e14bb325SJeff Bonwick 64999653d4eSeschrock tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; 65099653d4eSeschrock svd->vdev_deflate_ratio = 0; 6518654d025Sperrin 6528654d025Sperrin tvd->vdev_islog = svd->vdev_islog; 6538654d025Sperrin svd->vdev_islog = 0; 654fa9e4066Sahrens } 655fa9e4066Sahrens 656fa9e4066Sahrens static void 657fa9e4066Sahrens vdev_top_update(vdev_t *tvd, vdev_t *vd) 658fa9e4066Sahrens { 659fa9e4066Sahrens int c; 660fa9e4066Sahrens 661fa9e4066Sahrens if (vd == NULL) 662fa9e4066Sahrens return; 663fa9e4066Sahrens 664fa9e4066Sahrens vd->vdev_top = tvd; 665fa9e4066Sahrens 666fa9e4066Sahrens for (c = 0; c < vd->vdev_children; c++) 667fa9e4066Sahrens vdev_top_update(tvd, vd->vdev_child[c]); 668fa9e4066Sahrens } 669fa9e4066Sahrens 670fa9e4066Sahrens /* 671fa9e4066Sahrens * Add a mirror/replacing vdev above an existing vdev. 672fa9e4066Sahrens */ 673fa9e4066Sahrens vdev_t * 674fa9e4066Sahrens vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) 675fa9e4066Sahrens { 676fa9e4066Sahrens spa_t *spa = cvd->vdev_spa; 677fa9e4066Sahrens vdev_t *pvd = cvd->vdev_parent; 678fa9e4066Sahrens vdev_t *mvd; 679fa9e4066Sahrens 680e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 681fa9e4066Sahrens 682fa9e4066Sahrens mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); 683ecc2d604Sbonwick 684ecc2d604Sbonwick mvd->vdev_asize = cvd->vdev_asize; 685ecc2d604Sbonwick mvd->vdev_ashift = cvd->vdev_ashift; 686ecc2d604Sbonwick mvd->vdev_state = cvd->vdev_state; 687ecc2d604Sbonwick 688fa9e4066Sahrens vdev_remove_child(pvd, cvd); 689fa9e4066Sahrens vdev_add_child(pvd, mvd); 690fa9e4066Sahrens cvd->vdev_id = mvd->vdev_children; 691fa9e4066Sahrens vdev_add_child(mvd, cvd); 692fa9e4066Sahrens vdev_top_update(cvd->vdev_top, cvd->vdev_top); 693fa9e4066Sahrens 694fa9e4066Sahrens if (mvd == mvd->vdev_top) 695fa9e4066Sahrens vdev_top_transfer(cvd, mvd); 696fa9e4066Sahrens 697fa9e4066Sahrens return (mvd); 698fa9e4066Sahrens } 699fa9e4066Sahrens 700fa9e4066Sahrens /* 701fa9e4066Sahrens * Remove a 1-way mirror/replacing vdev from the tree. 702fa9e4066Sahrens */ 703fa9e4066Sahrens void 704fa9e4066Sahrens vdev_remove_parent(vdev_t *cvd) 705fa9e4066Sahrens { 706fa9e4066Sahrens vdev_t *mvd = cvd->vdev_parent; 707fa9e4066Sahrens vdev_t *pvd = mvd->vdev_parent; 708fa9e4066Sahrens 709e14bb325SJeff Bonwick ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 710fa9e4066Sahrens 711fa9e4066Sahrens ASSERT(mvd->vdev_children == 1); 712fa9e4066Sahrens ASSERT(mvd->vdev_ops == &vdev_mirror_ops || 71399653d4eSeschrock mvd->vdev_ops == &vdev_replacing_ops || 71499653d4eSeschrock mvd->vdev_ops == &vdev_spare_ops); 715ecc2d604Sbonwick cvd->vdev_ashift = mvd->vdev_ashift; 716fa9e4066Sahrens 717fa9e4066Sahrens vdev_remove_child(mvd, cvd); 718fa9e4066Sahrens vdev_remove_child(pvd, mvd); 7198ad4d6ddSJeff Bonwick 72099653d4eSeschrock /* 721e14bb325SJeff Bonwick * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. 722e14bb325SJeff Bonwick * Otherwise, we could have detached an offline device, and when we 723e14bb325SJeff Bonwick * go to import the pool we'll think we have two top-level vdevs, 724e14bb325SJeff Bonwick * instead of a different version of the same top-level vdev. 72599653d4eSeschrock */ 7268ad4d6ddSJeff Bonwick if (mvd->vdev_top == mvd) { 7278ad4d6ddSJeff Bonwick uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid; 7288ad4d6ddSJeff Bonwick cvd->vdev_guid += guid_delta; 7298ad4d6ddSJeff Bonwick cvd->vdev_guid_sum += guid_delta; 7308ad4d6ddSJeff Bonwick } 731e14bb325SJeff Bonwick cvd->vdev_id = mvd->vdev_id; 732e14bb325SJeff Bonwick vdev_add_child(pvd, cvd); 733fa9e4066Sahrens vdev_top_update(cvd->vdev_top, cvd->vdev_top); 734fa9e4066Sahrens 735fa9e4066Sahrens if (cvd == cvd->vdev_top) 736fa9e4066Sahrens vdev_top_transfer(mvd, cvd); 737fa9e4066Sahrens 738fa9e4066Sahrens ASSERT(mvd->vdev_children == 0); 739fa9e4066Sahrens vdev_free(mvd); 740fa9e4066Sahrens } 741fa9e4066Sahrens 742ea8dc4b6Seschrock int 743fa9e4066Sahrens vdev_metaslab_init(vdev_t *vd, uint64_t txg) 744fa9e4066Sahrens { 745fa9e4066Sahrens spa_t *spa = vd->vdev_spa; 746ecc2d604Sbonwick objset_t *mos = spa->spa_meta_objset; 7478654d025Sperrin metaslab_class_t *mc; 748ecc2d604Sbonwick uint64_t m; 749fa9e4066Sahrens uint64_t oldc = vd->vdev_ms_count; 750fa9e4066Sahrens uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; 751ecc2d604Sbonwick metaslab_t **mspp; 752ecc2d604Sbonwick int error; 753fa9e4066Sahrens 7540e34b6a7Sbonwick if (vd->vdev_ms_shift == 0) /* not being allocated from yet */ 7550e34b6a7Sbonwick return (0); 7560e34b6a7Sbonwick 757fa9e4066Sahrens ASSERT(oldc <= newc); 758fa9e4066Sahrens 7598654d025Sperrin if (vd->vdev_islog) 7608654d025Sperrin mc = spa->spa_log_class; 7618654d025Sperrin else 7628654d025Sperrin mc = spa->spa_normal_class; 7638654d025Sperrin 764ecc2d604Sbonwick if (vd->vdev_mg == NULL) 765ecc2d604Sbonwick vd->vdev_mg = metaslab_group_create(mc, vd); 766fa9e4066Sahrens 767ecc2d604Sbonwick mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); 768fa9e4066Sahrens 769ecc2d604Sbonwick if (oldc != 0) { 770ecc2d604Sbonwick bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); 771ecc2d604Sbonwick kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); 772ecc2d604Sbonwick } 773fa9e4066Sahrens 774ecc2d604Sbonwick vd->vdev_ms = mspp; 775ecc2d604Sbonwick vd->vdev_ms_count = newc; 776fa9e4066Sahrens 777ecc2d604Sbonwick for (m = oldc; m < newc; m++) { 778ecc2d604Sbonwick space_map_obj_t smo = { 0, 0, 0 }; 779ecc2d604Sbonwick if (txg == 0) { 780ecc2d604Sbonwick uint64_t object = 0; 781ecc2d604Sbonwick error = dmu_read(mos, vd->vdev_ms_array, 782ecc2d604Sbonwick m * sizeof (uint64_t), sizeof (uint64_t), &object); 783ecc2d604Sbonwick if (error) 784ecc2d604Sbonwick return (error); 785ecc2d604Sbonwick if (object != 0) { 786ecc2d604Sbonwick dmu_buf_t *db; 787ecc2d604Sbonwick error = dmu_bonus_hold(mos, object, FTAG, &db); 788ecc2d604Sbonwick if (error) 789ecc2d604Sbonwick return (error); 7901934e92fSmaybee ASSERT3U(db->db_size, >=, sizeof (smo)); 7911934e92fSmaybee bcopy(db->db_data, &smo, sizeof (smo)); 792ecc2d604Sbonwick ASSERT3U(smo.smo_object, ==, object); 793ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 794fa9e4066Sahrens } 795fa9e4066Sahrens } 796ecc2d604Sbonwick vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, 797ecc2d604Sbonwick m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); 798fa9e4066Sahrens } 799fa9e4066Sahrens 800ea8dc4b6Seschrock return (0); 801fa9e4066Sahrens } 802fa9e4066Sahrens 803fa9e4066Sahrens void 804fa9e4066Sahrens vdev_metaslab_fini(vdev_t *vd) 805fa9e4066Sahrens { 806fa9e4066Sahrens uint64_t m; 807fa9e4066Sahrens uint64_t count = vd->vdev_ms_count; 808fa9e4066Sahrens 809fa9e4066Sahrens if (vd->vdev_ms != NULL) { 810fa9e4066Sahrens for (m = 0; m < count; m++) 811ecc2d604Sbonwick if (vd->vdev_ms[m] != NULL) 812ecc2d604Sbonwick metaslab_fini(vd->vdev_ms[m]); 813fa9e4066Sahrens kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); 814fa9e4066Sahrens vd->vdev_ms = NULL; 815fa9e4066Sahrens } 816fa9e4066Sahrens } 817fa9e4066Sahrens 818e14bb325SJeff Bonwick typedef struct vdev_probe_stats { 819e14bb325SJeff Bonwick boolean_t vps_readable; 820e14bb325SJeff Bonwick boolean_t vps_writeable; 821e14bb325SJeff Bonwick int vps_flags; 822e14bb325SJeff Bonwick } vdev_probe_stats_t; 823e14bb325SJeff Bonwick 824e14bb325SJeff Bonwick static void 825e14bb325SJeff Bonwick vdev_probe_done(zio_t *zio) 8260a4e9518Sgw { 8278ad4d6ddSJeff Bonwick spa_t *spa = zio->io_spa; 828a3f829aeSBill Moore vdev_t *vd = zio->io_vd; 829e14bb325SJeff Bonwick vdev_probe_stats_t *vps = zio->io_private; 830a3f829aeSBill Moore 831a3f829aeSBill Moore ASSERT(vd->vdev_probe_zio != NULL); 832e14bb325SJeff Bonwick 833e14bb325SJeff Bonwick if (zio->io_type == ZIO_TYPE_READ) { 834e14bb325SJeff Bonwick if (zio->io_error == 0) 835e14bb325SJeff Bonwick vps->vps_readable = 1; 8368ad4d6ddSJeff Bonwick if (zio->io_error == 0 && spa_writeable(spa)) { 837a3f829aeSBill Moore zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd, 838e14bb325SJeff Bonwick zio->io_offset, zio->io_size, zio->io_data, 839e14bb325SJeff Bonwick ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 840e14bb325SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); 841e14bb325SJeff Bonwick } else { 842e14bb325SJeff Bonwick zio_buf_free(zio->io_data, zio->io_size); 843e14bb325SJeff Bonwick } 844e14bb325SJeff Bonwick } else if (zio->io_type == ZIO_TYPE_WRITE) { 845e14bb325SJeff Bonwick if (zio->io_error == 0) 846e14bb325SJeff Bonwick vps->vps_writeable = 1; 847e14bb325SJeff Bonwick zio_buf_free(zio->io_data, zio->io_size); 848e14bb325SJeff Bonwick } else if (zio->io_type == ZIO_TYPE_NULL) { 849a3f829aeSBill Moore zio_t *pio; 850e14bb325SJeff Bonwick 851e14bb325SJeff Bonwick vd->vdev_cant_read |= !vps->vps_readable; 852e14bb325SJeff Bonwick vd->vdev_cant_write |= !vps->vps_writeable; 853e14bb325SJeff Bonwick 854e14bb325SJeff Bonwick if (vdev_readable(vd) && 8558ad4d6ddSJeff Bonwick (vdev_writeable(vd) || !spa_writeable(spa))) { 856e14bb325SJeff Bonwick zio->io_error = 0; 857e14bb325SJeff Bonwick } else { 858e14bb325SJeff Bonwick ASSERT(zio->io_error != 0); 859e14bb325SJeff Bonwick zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE, 8608ad4d6ddSJeff Bonwick spa, vd, NULL, 0, 0); 861e14bb325SJeff Bonwick zio->io_error = ENXIO; 862e14bb325SJeff Bonwick } 863a3f829aeSBill Moore 864a3f829aeSBill Moore mutex_enter(&vd->vdev_probe_lock); 865a3f829aeSBill Moore ASSERT(vd->vdev_probe_zio == zio); 866a3f829aeSBill Moore vd->vdev_probe_zio = NULL; 867a3f829aeSBill Moore mutex_exit(&vd->vdev_probe_lock); 868a3f829aeSBill Moore 869a3f829aeSBill Moore while ((pio = zio_walk_parents(zio)) != NULL) 870a3f829aeSBill Moore if (!vdev_accessible(vd, pio)) 871a3f829aeSBill Moore pio->io_error = ENXIO; 872a3f829aeSBill Moore 873e14bb325SJeff Bonwick kmem_free(vps, sizeof (*vps)); 874e14bb325SJeff Bonwick } 875e14bb325SJeff Bonwick } 8760a4e9518Sgw 877e14bb325SJeff Bonwick /* 878e14bb325SJeff Bonwick * Determine whether this device is accessible by reading and writing 879e14bb325SJeff Bonwick * to several known locations: the pad regions of each vdev label 880e14bb325SJeff Bonwick * but the first (which we leave alone in case it contains a VTOC). 881e14bb325SJeff Bonwick */ 882e14bb325SJeff Bonwick zio_t * 883a3f829aeSBill Moore vdev_probe(vdev_t *vd, zio_t *zio) 884e14bb325SJeff Bonwick { 885e14bb325SJeff Bonwick spa_t *spa = vd->vdev_spa; 886a3f829aeSBill Moore vdev_probe_stats_t *vps = NULL; 887a3f829aeSBill Moore zio_t *pio; 888a3f829aeSBill Moore 889a3f829aeSBill Moore ASSERT(vd->vdev_ops->vdev_op_leaf); 8900a4e9518Sgw 891a3f829aeSBill Moore /* 892a3f829aeSBill Moore * Don't probe the probe. 893a3f829aeSBill Moore */ 894a3f829aeSBill Moore if (zio && (zio->io_flags & ZIO_FLAG_PROBE)) 895a3f829aeSBill Moore return (NULL); 896e14bb325SJeff Bonwick 897a3f829aeSBill Moore /* 898a3f829aeSBill Moore * To prevent 'probe storms' when a device fails, we create 899a3f829aeSBill Moore * just one probe i/o at a time. All zios that want to probe 900a3f829aeSBill Moore * this vdev will become parents of the probe io. 901a3f829aeSBill Moore */ 902a3f829aeSBill Moore mutex_enter(&vd->vdev_probe_lock); 903e14bb325SJeff Bonwick 904a3f829aeSBill Moore if ((pio = vd->vdev_probe_zio) == NULL) { 905a3f829aeSBill Moore vps = kmem_zalloc(sizeof (*vps), KM_SLEEP); 906a3f829aeSBill Moore 907a3f829aeSBill Moore vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | 908a3f829aeSBill Moore ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | 909a3f829aeSBill Moore ZIO_FLAG_DONT_RETRY; 910a3f829aeSBill Moore 911a3f829aeSBill Moore if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { 912a3f829aeSBill Moore /* 913a3f829aeSBill Moore * vdev_cant_read and vdev_cant_write can only 914a3f829aeSBill Moore * transition from TRUE to FALSE when we have the 915a3f829aeSBill Moore * SCL_ZIO lock as writer; otherwise they can only 916a3f829aeSBill Moore * transition from FALSE to TRUE. This ensures that 917a3f829aeSBill Moore * any zio looking at these values can assume that 918a3f829aeSBill Moore * failures persist for the life of the I/O. That's 919a3f829aeSBill Moore * important because when a device has intermittent 920a3f829aeSBill Moore * connectivity problems, we want to ensure that 921a3f829aeSBill Moore * they're ascribed to the device (ENXIO) and not 922a3f829aeSBill Moore * the zio (EIO). 923a3f829aeSBill Moore * 924a3f829aeSBill Moore * Since we hold SCL_ZIO as writer here, clear both 925a3f829aeSBill Moore * values so the probe can reevaluate from first 926a3f829aeSBill Moore * principles. 927a3f829aeSBill Moore */ 928a3f829aeSBill Moore vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; 929a3f829aeSBill Moore vd->vdev_cant_read = B_FALSE; 930a3f829aeSBill Moore vd->vdev_cant_write = B_FALSE; 931a3f829aeSBill Moore } 932a3f829aeSBill Moore 933a3f829aeSBill Moore vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd, 934a3f829aeSBill Moore vdev_probe_done, vps, 935a3f829aeSBill Moore vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE); 936a3f829aeSBill Moore 937a3f829aeSBill Moore if (zio != NULL) { 938a3f829aeSBill Moore vd->vdev_probe_wanted = B_TRUE; 939a3f829aeSBill Moore spa_async_request(spa, SPA_ASYNC_PROBE); 940a3f829aeSBill Moore } 941e14bb325SJeff Bonwick } 942e14bb325SJeff Bonwick 943a3f829aeSBill Moore if (zio != NULL) 944a3f829aeSBill Moore zio_add_child(zio, pio); 945e14bb325SJeff Bonwick 946a3f829aeSBill Moore mutex_exit(&vd->vdev_probe_lock); 947e14bb325SJeff Bonwick 948a3f829aeSBill Moore if (vps == NULL) { 949a3f829aeSBill Moore ASSERT(zio != NULL); 950a3f829aeSBill Moore return (NULL); 951a3f829aeSBill Moore } 952e14bb325SJeff Bonwick 953e14bb325SJeff Bonwick for (int l = 1; l < VDEV_LABELS; l++) { 954a3f829aeSBill Moore zio_nowait(zio_read_phys(pio, vd, 955e14bb325SJeff Bonwick vdev_label_offset(vd->vdev_psize, l, 956f83ffe1aSLin Ling offsetof(vdev_label_t, vl_pad2)), 957f83ffe1aSLin Ling VDEV_PAD_SIZE, zio_buf_alloc(VDEV_PAD_SIZE), 958e14bb325SJeff Bonwick ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 959e14bb325SJeff Bonwick ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); 960e14bb325SJeff Bonwick } 961e14bb325SJeff Bonwick 962a3f829aeSBill Moore if (zio == NULL) 963a3f829aeSBill Moore return (pio); 964a3f829aeSBill Moore 965a3f829aeSBill Moore zio_nowait(pio); 966a3f829aeSBill Moore return (NULL); 9670a4e9518Sgw } 9680a4e9518Sgw 969fa9e4066Sahrens /* 970fa9e4066Sahrens * Prepare a virtual device for access. 971fa9e4066Sahrens */ 972fa9e4066Sahrens int 973fa9e4066Sahrens vdev_open(vdev_t *vd) 974fa9e4066Sahrens { 9758ad4d6ddSJeff Bonwick spa_t *spa = vd->vdev_spa; 976fa9e4066Sahrens int error; 977fa9e4066Sahrens int c; 978fa9e4066Sahrens uint64_t osize = 0; 979fa9e4066Sahrens uint64_t asize, psize; 980ecc2d604Sbonwick uint64_t ashift = 0; 981fa9e4066Sahrens 9828ad4d6ddSJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 9838ad4d6ddSJeff Bonwick 984fa9e4066Sahrens ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || 985fa9e4066Sahrens vd->vdev_state == VDEV_STATE_CANT_OPEN || 986fa9e4066Sahrens vd->vdev_state == VDEV_STATE_OFFLINE); 987fa9e4066Sahrens 988fa9e4066Sahrens vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 989fa9e4066Sahrens 9903d7072f8Seschrock if (!vd->vdev_removed && vd->vdev_faulted) { 9913d7072f8Seschrock ASSERT(vd->vdev_children == 0); 9923d7072f8Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 9933d7072f8Seschrock VDEV_AUX_ERR_EXCEEDED); 9943d7072f8Seschrock return (ENXIO); 9953d7072f8Seschrock } else if (vd->vdev_offline) { 996fa9e4066Sahrens ASSERT(vd->vdev_children == 0); 997ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); 998fa9e4066Sahrens return (ENXIO); 999fa9e4066Sahrens } 1000fa9e4066Sahrens 1001fa9e4066Sahrens error = vd->vdev_ops->vdev_op_open(vd, &osize, &ashift); 1002fa9e4066Sahrens 1003ea8dc4b6Seschrock if (zio_injection_enabled && error == 0) 1004ea8dc4b6Seschrock error = zio_handle_device_injection(vd, ENXIO); 1005ea8dc4b6Seschrock 1006fa9e4066Sahrens if (error) { 10073d7072f8Seschrock if (vd->vdev_removed && 10083d7072f8Seschrock vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) 10093d7072f8Seschrock vd->vdev_removed = B_FALSE; 10103d7072f8Seschrock 1011ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1012fa9e4066Sahrens vd->vdev_stat.vs_aux); 1013fa9e4066Sahrens return (error); 1014fa9e4066Sahrens } 1015fa9e4066Sahrens 10163d7072f8Seschrock vd->vdev_removed = B_FALSE; 10173d7072f8Seschrock 10183d7072f8Seschrock if (vd->vdev_degraded) { 10193d7072f8Seschrock ASSERT(vd->vdev_children == 0); 10203d7072f8Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 10213d7072f8Seschrock VDEV_AUX_ERR_EXCEEDED); 10223d7072f8Seschrock } else { 10233d7072f8Seschrock vd->vdev_state = VDEV_STATE_HEALTHY; 10243d7072f8Seschrock } 1025fa9e4066Sahrens 1026fa9e4066Sahrens for (c = 0; c < vd->vdev_children; c++) 1027ea8dc4b6Seschrock if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { 1028ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 1029ea8dc4b6Seschrock VDEV_AUX_NONE); 1030ea8dc4b6Seschrock break; 1031ea8dc4b6Seschrock } 1032fa9e4066Sahrens 1033fa9e4066Sahrens osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); 1034fa9e4066Sahrens 1035fa9e4066Sahrens if (vd->vdev_children == 0) { 1036fa9e4066Sahrens if (osize < SPA_MINDEVSIZE) { 1037ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1038ea8dc4b6Seschrock VDEV_AUX_TOO_SMALL); 1039fa9e4066Sahrens return (EOVERFLOW); 1040fa9e4066Sahrens } 1041fa9e4066Sahrens psize = osize; 1042fa9e4066Sahrens asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); 1043fa9e4066Sahrens } else { 1044ecc2d604Sbonwick if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - 1045fa9e4066Sahrens (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { 1046ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1047ea8dc4b6Seschrock VDEV_AUX_TOO_SMALL); 1048fa9e4066Sahrens return (EOVERFLOW); 1049fa9e4066Sahrens } 1050fa9e4066Sahrens psize = 0; 1051fa9e4066Sahrens asize = osize; 1052fa9e4066Sahrens } 1053fa9e4066Sahrens 1054fa9e4066Sahrens vd->vdev_psize = psize; 1055fa9e4066Sahrens 1056fa9e4066Sahrens if (vd->vdev_asize == 0) { 1057fa9e4066Sahrens /* 1058fa9e4066Sahrens * This is the first-ever open, so use the computed values. 1059ecc2d604Sbonwick * For testing purposes, a higher ashift can be requested. 1060fa9e4066Sahrens */ 1061fa9e4066Sahrens vd->vdev_asize = asize; 1062ecc2d604Sbonwick vd->vdev_ashift = MAX(ashift, vd->vdev_ashift); 1063fa9e4066Sahrens } else { 1064fa9e4066Sahrens /* 1065fa9e4066Sahrens * Make sure the alignment requirement hasn't increased. 1066fa9e4066Sahrens */ 1067ecc2d604Sbonwick if (ashift > vd->vdev_top->vdev_ashift) { 1068ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1069ea8dc4b6Seschrock VDEV_AUX_BAD_LABEL); 1070fa9e4066Sahrens return (EINVAL); 1071fa9e4066Sahrens } 1072fa9e4066Sahrens 1073fa9e4066Sahrens /* 1074fa9e4066Sahrens * Make sure the device hasn't shrunk. 1075fa9e4066Sahrens */ 1076fa9e4066Sahrens if (asize < vd->vdev_asize) { 1077ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1078ea8dc4b6Seschrock VDEV_AUX_BAD_LABEL); 1079fa9e4066Sahrens return (EINVAL); 1080fa9e4066Sahrens } 1081fa9e4066Sahrens 1082fa9e4066Sahrens /* 1083fa9e4066Sahrens * If all children are healthy and the asize has increased, 1084fa9e4066Sahrens * then we've experienced dynamic LUN growth. 1085fa9e4066Sahrens */ 1086fa9e4066Sahrens if (vd->vdev_state == VDEV_STATE_HEALTHY && 1087fa9e4066Sahrens asize > vd->vdev_asize) { 1088fa9e4066Sahrens vd->vdev_asize = asize; 1089fa9e4066Sahrens } 1090fa9e4066Sahrens } 1091fa9e4066Sahrens 10920a4e9518Sgw /* 10930a4e9518Sgw * Ensure we can issue some IO before declaring the 10940a4e9518Sgw * vdev open for business. 10950a4e9518Sgw */ 1096e14bb325SJeff Bonwick if (vd->vdev_ops->vdev_op_leaf && 1097e14bb325SJeff Bonwick (error = zio_wait(vdev_probe(vd, NULL))) != 0) { 10980a4e9518Sgw vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1099e14bb325SJeff Bonwick VDEV_AUX_IO_FAILURE); 11000a4e9518Sgw return (error); 11010a4e9518Sgw } 11020a4e9518Sgw 110399653d4eSeschrock /* 110499653d4eSeschrock * If this is a top-level vdev, compute the raidz-deflation 110599653d4eSeschrock * ratio. Note, we hard-code in 128k (1<<17) because it is the 110699653d4eSeschrock * current "typical" blocksize. Even if SPA_MAXBLOCKSIZE 110799653d4eSeschrock * changes, this algorithm must never change, or we will 110899653d4eSeschrock * inconsistently account for existing bp's. 110999653d4eSeschrock */ 111099653d4eSeschrock if (vd->vdev_top == vd) { 111199653d4eSeschrock vd->vdev_deflate_ratio = (1<<17) / 111299653d4eSeschrock (vdev_psize_to_asize(vd, 1<<17) >> SPA_MINBLOCKSHIFT); 111399653d4eSeschrock } 111499653d4eSeschrock 1115088f3894Sahrens /* 1116088f3894Sahrens * If a leaf vdev has a DTL, and seems healthy, then kick off a 11178ad4d6ddSJeff Bonwick * resilver. But don't do this if we are doing a reopen for a scrub, 11188ad4d6ddSJeff Bonwick * since this would just restart the scrub we are already doing. 1119088f3894Sahrens */ 11208ad4d6ddSJeff Bonwick if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen && 11218ad4d6ddSJeff Bonwick vdev_resilver_needed(vd, NULL, NULL)) 11228ad4d6ddSJeff Bonwick spa_async_request(spa, SPA_ASYNC_RESILVER); 1123088f3894Sahrens 1124fa9e4066Sahrens return (0); 1125fa9e4066Sahrens } 1126fa9e4066Sahrens 1127560e6e96Seschrock /* 1128560e6e96Seschrock * Called once the vdevs are all opened, this routine validates the label 1129560e6e96Seschrock * contents. This needs to be done before vdev_load() so that we don't 11303d7072f8Seschrock * inadvertently do repair I/Os to the wrong device. 1131560e6e96Seschrock * 1132560e6e96Seschrock * This function will only return failure if one of the vdevs indicates that it 1133560e6e96Seschrock * has since been destroyed or exported. This is only possible if 1134560e6e96Seschrock * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state 1135560e6e96Seschrock * will be updated but the function will return 0. 1136560e6e96Seschrock */ 1137560e6e96Seschrock int 1138560e6e96Seschrock vdev_validate(vdev_t *vd) 1139560e6e96Seschrock { 1140560e6e96Seschrock spa_t *spa = vd->vdev_spa; 1141560e6e96Seschrock int c; 1142560e6e96Seschrock nvlist_t *label; 1143e14bb325SJeff Bonwick uint64_t guid, top_guid; 1144560e6e96Seschrock uint64_t state; 1145560e6e96Seschrock 1146560e6e96Seschrock for (c = 0; c < vd->vdev_children; c++) 1147560e6e96Seschrock if (vdev_validate(vd->vdev_child[c]) != 0) 11480bf246f5Smc return (EBADF); 1149560e6e96Seschrock 1150b5989ec7Seschrock /* 1151b5989ec7Seschrock * If the device has already failed, or was marked offline, don't do 1152b5989ec7Seschrock * any further validation. Otherwise, label I/O will fail and we will 1153b5989ec7Seschrock * overwrite the previous state. 1154b5989ec7Seschrock */ 1155e14bb325SJeff Bonwick if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { 1156560e6e96Seschrock 1157560e6e96Seschrock if ((label = vdev_label_read_config(vd)) == NULL) { 1158560e6e96Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1159560e6e96Seschrock VDEV_AUX_BAD_LABEL); 1160560e6e96Seschrock return (0); 1161560e6e96Seschrock } 1162560e6e96Seschrock 1163560e6e96Seschrock if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, 1164560e6e96Seschrock &guid) != 0 || guid != spa_guid(spa)) { 1165560e6e96Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1166560e6e96Seschrock VDEV_AUX_CORRUPT_DATA); 1167560e6e96Seschrock nvlist_free(label); 1168560e6e96Seschrock return (0); 1169560e6e96Seschrock } 1170560e6e96Seschrock 1171e14bb325SJeff Bonwick /* 1172e14bb325SJeff Bonwick * If this vdev just became a top-level vdev because its 1173e14bb325SJeff Bonwick * sibling was detached, it will have adopted the parent's 1174e14bb325SJeff Bonwick * vdev guid -- but the label may or may not be on disk yet. 1175e14bb325SJeff Bonwick * Fortunately, either version of the label will have the 1176e14bb325SJeff Bonwick * same top guid, so if we're a top-level vdev, we can 1177e14bb325SJeff Bonwick * safely compare to that instead. 1178e14bb325SJeff Bonwick */ 1179560e6e96Seschrock if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, 1180e14bb325SJeff Bonwick &guid) != 0 || 1181e14bb325SJeff Bonwick nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, 1182e14bb325SJeff Bonwick &top_guid) != 0 || 1183e14bb325SJeff Bonwick (vd->vdev_guid != guid && 1184e14bb325SJeff Bonwick (vd->vdev_guid != top_guid || vd != vd->vdev_top))) { 1185560e6e96Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1186560e6e96Seschrock VDEV_AUX_CORRUPT_DATA); 1187560e6e96Seschrock nvlist_free(label); 1188560e6e96Seschrock return (0); 1189560e6e96Seschrock } 1190560e6e96Seschrock 1191560e6e96Seschrock if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, 1192560e6e96Seschrock &state) != 0) { 1193560e6e96Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1194560e6e96Seschrock VDEV_AUX_CORRUPT_DATA); 1195560e6e96Seschrock nvlist_free(label); 1196560e6e96Seschrock return (0); 1197560e6e96Seschrock } 1198560e6e96Seschrock 1199560e6e96Seschrock nvlist_free(label); 1200560e6e96Seschrock 1201560e6e96Seschrock if (spa->spa_load_state == SPA_LOAD_OPEN && 1202560e6e96Seschrock state != POOL_STATE_ACTIVE) 12030bf246f5Smc return (EBADF); 1204560e6e96Seschrock 120551ece835Seschrock /* 120651ece835Seschrock * If we were able to open and validate a vdev that was 120751ece835Seschrock * previously marked permanently unavailable, clear that state 120851ece835Seschrock * now. 120951ece835Seschrock */ 121051ece835Seschrock if (vd->vdev_not_present) 121151ece835Seschrock vd->vdev_not_present = 0; 121251ece835Seschrock } 1213560e6e96Seschrock 1214560e6e96Seschrock return (0); 1215560e6e96Seschrock } 1216560e6e96Seschrock 1217fa9e4066Sahrens /* 1218fa9e4066Sahrens * Close a virtual device. 1219fa9e4066Sahrens */ 1220fa9e4066Sahrens void 1221fa9e4066Sahrens vdev_close(vdev_t *vd) 1222fa9e4066Sahrens { 12238ad4d6ddSJeff Bonwick spa_t *spa = vd->vdev_spa; 12248ad4d6ddSJeff Bonwick 12258ad4d6ddSJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 12268ad4d6ddSJeff Bonwick 1227fa9e4066Sahrens vd->vdev_ops->vdev_op_close(vd); 1228fa9e4066Sahrens 12293d7072f8Seschrock vdev_cache_purge(vd); 1230fa9e4066Sahrens 1231560e6e96Seschrock /* 1232560e6e96Seschrock * We record the previous state before we close it, so that if we are 1233560e6e96Seschrock * doing a reopen(), we don't generate FMA ereports if we notice that 1234560e6e96Seschrock * it's still faulted. 1235560e6e96Seschrock */ 1236560e6e96Seschrock vd->vdev_prevstate = vd->vdev_state; 1237560e6e96Seschrock 1238fa9e4066Sahrens if (vd->vdev_offline) 1239fa9e4066Sahrens vd->vdev_state = VDEV_STATE_OFFLINE; 1240fa9e4066Sahrens else 1241fa9e4066Sahrens vd->vdev_state = VDEV_STATE_CLOSED; 1242ea8dc4b6Seschrock vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 1243fa9e4066Sahrens } 1244fa9e4066Sahrens 1245fa9e4066Sahrens void 1246ea8dc4b6Seschrock vdev_reopen(vdev_t *vd) 1247fa9e4066Sahrens { 1248ea8dc4b6Seschrock spa_t *spa = vd->vdev_spa; 1249fa9e4066Sahrens 1250e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1251ea8dc4b6Seschrock 1252fa9e4066Sahrens vdev_close(vd); 1253fa9e4066Sahrens (void) vdev_open(vd); 1254fa9e4066Sahrens 125539c23413Seschrock /* 125639c23413Seschrock * Call vdev_validate() here to make sure we have the same device. 125739c23413Seschrock * Otherwise, a device with an invalid label could be successfully 125839c23413Seschrock * opened in response to vdev_reopen(). 125939c23413Seschrock */ 1260c5904d13Seschrock if (vd->vdev_aux) { 1261c5904d13Seschrock (void) vdev_validate_aux(vd); 1262e14bb325SJeff Bonwick if (vdev_readable(vd) && vdev_writeable(vd) && 1263*6809eb4eSEric Schrock vd->vdev_aux == &spa->spa_l2cache && 1264c5904d13Seschrock !l2arc_vdev_present(vd)) { 1265c5904d13Seschrock uint64_t size = vdev_get_rsize(vd); 1266c5904d13Seschrock l2arc_add_vdev(spa, vd, 1267c5904d13Seschrock VDEV_LABEL_START_SIZE, 1268c5904d13Seschrock size - VDEV_LABEL_START_SIZE); 1269c5904d13Seschrock } 1270c5904d13Seschrock } else { 1271c5904d13Seschrock (void) vdev_validate(vd); 1272c5904d13Seschrock } 127339c23413Seschrock 1274fa9e4066Sahrens /* 12753d7072f8Seschrock * Reassess parent vdev's health. 1276fa9e4066Sahrens */ 12773d7072f8Seschrock vdev_propagate_state(vd); 1278fa9e4066Sahrens } 1279fa9e4066Sahrens 1280fa9e4066Sahrens int 128199653d4eSeschrock vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) 1282fa9e4066Sahrens { 1283fa9e4066Sahrens int error; 1284fa9e4066Sahrens 1285fa9e4066Sahrens /* 1286fa9e4066Sahrens * Normally, partial opens (e.g. of a mirror) are allowed. 1287fa9e4066Sahrens * For a create, however, we want to fail the request if 1288fa9e4066Sahrens * there are any components we can't open. 1289fa9e4066Sahrens */ 1290fa9e4066Sahrens error = vdev_open(vd); 1291fa9e4066Sahrens 1292fa9e4066Sahrens if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { 1293fa9e4066Sahrens vdev_close(vd); 1294fa9e4066Sahrens return (error ? error : ENXIO); 1295fa9e4066Sahrens } 1296fa9e4066Sahrens 1297fa9e4066Sahrens /* 1298fa9e4066Sahrens * Recursively initialize all labels. 1299fa9e4066Sahrens */ 130039c23413Seschrock if ((error = vdev_label_init(vd, txg, isreplacing ? 130139c23413Seschrock VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { 1302fa9e4066Sahrens vdev_close(vd); 1303fa9e4066Sahrens return (error); 1304fa9e4066Sahrens } 1305fa9e4066Sahrens 1306fa9e4066Sahrens return (0); 1307fa9e4066Sahrens } 1308fa9e4066Sahrens 1309fa9e4066Sahrens /* 1310fa9e4066Sahrens * The is the latter half of vdev_create(). It is distinct because it 1311fa9e4066Sahrens * involves initiating transactions in order to do metaslab creation. 1312fa9e4066Sahrens * For creation, we want to try to create all vdevs at once and then undo it 1313fa9e4066Sahrens * if anything fails; this is much harder if we have pending transactions. 1314fa9e4066Sahrens */ 13150e34b6a7Sbonwick void 1316fa9e4066Sahrens vdev_init(vdev_t *vd, uint64_t txg) 1317fa9e4066Sahrens { 1318fa9e4066Sahrens /* 1319fa9e4066Sahrens * Aim for roughly 200 metaslabs per vdev. 1320fa9e4066Sahrens */ 1321fa9e4066Sahrens vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); 1322fa9e4066Sahrens vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); 1323fa9e4066Sahrens 1324fa9e4066Sahrens /* 13250e34b6a7Sbonwick * Initialize the vdev's metaslabs. This can't fail because 13260e34b6a7Sbonwick * there's nothing to read when creating all new metaslabs. 1327fa9e4066Sahrens */ 13280e34b6a7Sbonwick VERIFY(vdev_metaslab_init(vd, txg) == 0); 1329fa9e4066Sahrens } 1330fa9e4066Sahrens 1331fa9e4066Sahrens void 1332ecc2d604Sbonwick vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) 1333fa9e4066Sahrens { 1334ecc2d604Sbonwick ASSERT(vd == vd->vdev_top); 1335ecc2d604Sbonwick ASSERT(ISP2(flags)); 1336fa9e4066Sahrens 1337ecc2d604Sbonwick if (flags & VDD_METASLAB) 1338ecc2d604Sbonwick (void) txg_list_add(&vd->vdev_ms_list, arg, txg); 1339ecc2d604Sbonwick 1340ecc2d604Sbonwick if (flags & VDD_DTL) 1341ecc2d604Sbonwick (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); 1342ecc2d604Sbonwick 1343ecc2d604Sbonwick (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); 1344fa9e4066Sahrens } 1345fa9e4066Sahrens 13468ad4d6ddSJeff Bonwick /* 13478ad4d6ddSJeff Bonwick * DTLs. 13488ad4d6ddSJeff Bonwick * 13498ad4d6ddSJeff Bonwick * A vdev's DTL (dirty time log) is the set of transaction groups for which 13508ad4d6ddSJeff Bonwick * the vdev has less than perfect replication. There are three kinds of DTL: 13518ad4d6ddSJeff Bonwick * 13528ad4d6ddSJeff Bonwick * DTL_MISSING: txgs for which the vdev has no valid copies of the data 13538ad4d6ddSJeff Bonwick * 13548ad4d6ddSJeff Bonwick * DTL_PARTIAL: txgs for which data is available, but not fully replicated 13558ad4d6ddSJeff Bonwick * 13568ad4d6ddSJeff Bonwick * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon 13578ad4d6ddSJeff Bonwick * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of 13588ad4d6ddSJeff Bonwick * txgs that was scrubbed. 13598ad4d6ddSJeff Bonwick * 13608ad4d6ddSJeff Bonwick * DTL_OUTAGE: txgs which cannot currently be read, whether due to 13618ad4d6ddSJeff Bonwick * persistent errors or just some device being offline. 13628ad4d6ddSJeff Bonwick * Unlike the other three, the DTL_OUTAGE map is not generally 13638ad4d6ddSJeff Bonwick * maintained; it's only computed when needed, typically to 13648ad4d6ddSJeff Bonwick * determine whether a device can be detached. 13658ad4d6ddSJeff Bonwick * 13668ad4d6ddSJeff Bonwick * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device 13678ad4d6ddSJeff Bonwick * either has the data or it doesn't. 13688ad4d6ddSJeff Bonwick * 13698ad4d6ddSJeff Bonwick * For interior vdevs such as mirror and RAID-Z the picture is more complex. 13708ad4d6ddSJeff Bonwick * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because 13718ad4d6ddSJeff Bonwick * if any child is less than fully replicated, then so is its parent. 13728ad4d6ddSJeff Bonwick * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs, 13738ad4d6ddSJeff Bonwick * comprising only those txgs which appear in 'maxfaults' or more children; 13748ad4d6ddSJeff Bonwick * those are the txgs we don't have enough replication to read. For example, 13758ad4d6ddSJeff Bonwick * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2); 13768ad4d6ddSJeff Bonwick * thus, its DTL_MISSING consists of the set of txgs that appear in more than 13778ad4d6ddSJeff Bonwick * two child DTL_MISSING maps. 13788ad4d6ddSJeff Bonwick * 13798ad4d6ddSJeff Bonwick * It should be clear from the above that to compute the DTLs and outage maps 13808ad4d6ddSJeff Bonwick * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps. 13818ad4d6ddSJeff Bonwick * Therefore, that is all we keep on disk. When loading the pool, or after 13828ad4d6ddSJeff Bonwick * a configuration change, we generate all other DTLs from first principles. 13838ad4d6ddSJeff Bonwick */ 1384fa9e4066Sahrens void 13858ad4d6ddSJeff Bonwick vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1386fa9e4066Sahrens { 13878ad4d6ddSJeff Bonwick space_map_t *sm = &vd->vdev_dtl[t]; 13888ad4d6ddSJeff Bonwick 13898ad4d6ddSJeff Bonwick ASSERT(t < DTL_TYPES); 13908ad4d6ddSJeff Bonwick ASSERT(vd != vd->vdev_spa->spa_root_vdev); 13918ad4d6ddSJeff Bonwick 1392fa9e4066Sahrens mutex_enter(sm->sm_lock); 1393fa9e4066Sahrens if (!space_map_contains(sm, txg, size)) 1394fa9e4066Sahrens space_map_add(sm, txg, size); 1395fa9e4066Sahrens mutex_exit(sm->sm_lock); 1396fa9e4066Sahrens } 1397fa9e4066Sahrens 13988ad4d6ddSJeff Bonwick boolean_t 13998ad4d6ddSJeff Bonwick vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1400fa9e4066Sahrens { 14018ad4d6ddSJeff Bonwick space_map_t *sm = &vd->vdev_dtl[t]; 14028ad4d6ddSJeff Bonwick boolean_t dirty = B_FALSE; 1403fa9e4066Sahrens 14048ad4d6ddSJeff Bonwick ASSERT(t < DTL_TYPES); 14058ad4d6ddSJeff Bonwick ASSERT(vd != vd->vdev_spa->spa_root_vdev); 1406fa9e4066Sahrens 1407fa9e4066Sahrens mutex_enter(sm->sm_lock); 14088ad4d6ddSJeff Bonwick if (sm->sm_space != 0) 14098ad4d6ddSJeff Bonwick dirty = space_map_contains(sm, txg, size); 1410fa9e4066Sahrens mutex_exit(sm->sm_lock); 1411fa9e4066Sahrens 1412fa9e4066Sahrens return (dirty); 1413fa9e4066Sahrens } 1414fa9e4066Sahrens 14158ad4d6ddSJeff Bonwick boolean_t 14168ad4d6ddSJeff Bonwick vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t) 14178ad4d6ddSJeff Bonwick { 14188ad4d6ddSJeff Bonwick space_map_t *sm = &vd->vdev_dtl[t]; 14198ad4d6ddSJeff Bonwick boolean_t empty; 14208ad4d6ddSJeff Bonwick 14218ad4d6ddSJeff Bonwick mutex_enter(sm->sm_lock); 14228ad4d6ddSJeff Bonwick empty = (sm->sm_space == 0); 14238ad4d6ddSJeff Bonwick mutex_exit(sm->sm_lock); 14248ad4d6ddSJeff Bonwick 14258ad4d6ddSJeff Bonwick return (empty); 14268ad4d6ddSJeff Bonwick } 14278ad4d6ddSJeff Bonwick 1428fa9e4066Sahrens /* 1429fa9e4066Sahrens * Reassess DTLs after a config change or scrub completion. 1430fa9e4066Sahrens */ 1431fa9e4066Sahrens void 1432fa9e4066Sahrens vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) 1433fa9e4066Sahrens { 1434ea8dc4b6Seschrock spa_t *spa = vd->vdev_spa; 14358ad4d6ddSJeff Bonwick avl_tree_t reftree; 14368ad4d6ddSJeff Bonwick int minref; 1437fa9e4066Sahrens 14388ad4d6ddSJeff Bonwick ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 1439fa9e4066Sahrens 14408ad4d6ddSJeff Bonwick for (int c = 0; c < vd->vdev_children; c++) 14418ad4d6ddSJeff Bonwick vdev_dtl_reassess(vd->vdev_child[c], txg, 14428ad4d6ddSJeff Bonwick scrub_txg, scrub_done); 14438ad4d6ddSJeff Bonwick 14448ad4d6ddSJeff Bonwick if (vd == spa->spa_root_vdev) 14458ad4d6ddSJeff Bonwick return; 14468ad4d6ddSJeff Bonwick 14478ad4d6ddSJeff Bonwick if (vd->vdev_ops->vdev_op_leaf) { 1448fa9e4066Sahrens mutex_enter(&vd->vdev_dtl_lock); 1449088f3894Sahrens if (scrub_txg != 0 && 1450088f3894Sahrens (spa->spa_scrub_started || spa->spa_scrub_errors == 0)) { 1451088f3894Sahrens /* XXX should check scrub_done? */ 1452088f3894Sahrens /* 1453088f3894Sahrens * We completed a scrub up to scrub_txg. If we 1454088f3894Sahrens * did it without rebooting, then the scrub dtl 1455088f3894Sahrens * will be valid, so excise the old region and 1456088f3894Sahrens * fold in the scrub dtl. Otherwise, leave the 1457088f3894Sahrens * dtl as-is if there was an error. 14588ad4d6ddSJeff Bonwick * 14598ad4d6ddSJeff Bonwick * There's little trick here: to excise the beginning 14608ad4d6ddSJeff Bonwick * of the DTL_MISSING map, we put it into a reference 14618ad4d6ddSJeff Bonwick * tree and then add a segment with refcnt -1 that 14628ad4d6ddSJeff Bonwick * covers the range [0, scrub_txg). This means 14638ad4d6ddSJeff Bonwick * that each txg in that range has refcnt -1 or 0. 14648ad4d6ddSJeff Bonwick * We then add DTL_SCRUB with a refcnt of 2, so that 14658ad4d6ddSJeff Bonwick * entries in the range [0, scrub_txg) will have a 14668ad4d6ddSJeff Bonwick * positive refcnt -- either 1 or 2. We then convert 14678ad4d6ddSJeff Bonwick * the reference tree into the new DTL_MISSING map. 1468088f3894Sahrens */ 14698ad4d6ddSJeff Bonwick space_map_ref_create(&reftree); 14708ad4d6ddSJeff Bonwick space_map_ref_add_map(&reftree, 14718ad4d6ddSJeff Bonwick &vd->vdev_dtl[DTL_MISSING], 1); 14728ad4d6ddSJeff Bonwick space_map_ref_add_seg(&reftree, 0, scrub_txg, -1); 14738ad4d6ddSJeff Bonwick space_map_ref_add_map(&reftree, 14748ad4d6ddSJeff Bonwick &vd->vdev_dtl[DTL_SCRUB], 2); 14758ad4d6ddSJeff Bonwick space_map_ref_generate_map(&reftree, 14768ad4d6ddSJeff Bonwick &vd->vdev_dtl[DTL_MISSING], 1); 14778ad4d6ddSJeff Bonwick space_map_ref_destroy(&reftree); 1478fa9e4066Sahrens } 14798ad4d6ddSJeff Bonwick space_map_vacate(&vd->vdev_dtl[DTL_PARTIAL], NULL, NULL); 14808ad4d6ddSJeff Bonwick space_map_walk(&vd->vdev_dtl[DTL_MISSING], 14818ad4d6ddSJeff Bonwick space_map_add, &vd->vdev_dtl[DTL_PARTIAL]); 1482fa9e4066Sahrens if (scrub_done) 14838ad4d6ddSJeff Bonwick space_map_vacate(&vd->vdev_dtl[DTL_SCRUB], NULL, NULL); 14848ad4d6ddSJeff Bonwick space_map_vacate(&vd->vdev_dtl[DTL_OUTAGE], NULL, NULL); 14858ad4d6ddSJeff Bonwick if (!vdev_readable(vd)) 14868ad4d6ddSJeff Bonwick space_map_add(&vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL); 14878ad4d6ddSJeff Bonwick else 14888ad4d6ddSJeff Bonwick space_map_walk(&vd->vdev_dtl[DTL_MISSING], 14898ad4d6ddSJeff Bonwick space_map_add, &vd->vdev_dtl[DTL_OUTAGE]); 1490fa9e4066Sahrens mutex_exit(&vd->vdev_dtl_lock); 1491088f3894Sahrens 1492ecc2d604Sbonwick if (txg != 0) 1493ecc2d604Sbonwick vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); 1494fa9e4066Sahrens return; 1495fa9e4066Sahrens } 1496fa9e4066Sahrens 1497fa9e4066Sahrens mutex_enter(&vd->vdev_dtl_lock); 14988ad4d6ddSJeff Bonwick for (int t = 0; t < DTL_TYPES; t++) { 14998ad4d6ddSJeff Bonwick if (t == DTL_SCRUB) 15008ad4d6ddSJeff Bonwick continue; /* leaf vdevs only */ 15018ad4d6ddSJeff Bonwick if (t == DTL_PARTIAL) 15028ad4d6ddSJeff Bonwick minref = 1; /* i.e. non-zero */ 15038ad4d6ddSJeff Bonwick else if (vd->vdev_nparity != 0) 15048ad4d6ddSJeff Bonwick minref = vd->vdev_nparity + 1; /* RAID-Z */ 15058ad4d6ddSJeff Bonwick else 15068ad4d6ddSJeff Bonwick minref = vd->vdev_children; /* any kind of mirror */ 15078ad4d6ddSJeff Bonwick space_map_ref_create(&reftree); 15088ad4d6ddSJeff Bonwick for (int c = 0; c < vd->vdev_children; c++) { 15098ad4d6ddSJeff Bonwick vdev_t *cvd = vd->vdev_child[c]; 15108ad4d6ddSJeff Bonwick mutex_enter(&cvd->vdev_dtl_lock); 15118ad4d6ddSJeff Bonwick space_map_ref_add_map(&reftree, &cvd->vdev_dtl[t], 1); 15128ad4d6ddSJeff Bonwick mutex_exit(&cvd->vdev_dtl_lock); 15138ad4d6ddSJeff Bonwick } 15148ad4d6ddSJeff Bonwick space_map_ref_generate_map(&reftree, &vd->vdev_dtl[t], minref); 15158ad4d6ddSJeff Bonwick space_map_ref_destroy(&reftree); 1516fa9e4066Sahrens } 15178ad4d6ddSJeff Bonwick mutex_exit(&vd->vdev_dtl_lock); 1518fa9e4066Sahrens } 1519fa9e4066Sahrens 1520fa9e4066Sahrens static int 1521fa9e4066Sahrens vdev_dtl_load(vdev_t *vd) 1522fa9e4066Sahrens { 1523fa9e4066Sahrens spa_t *spa = vd->vdev_spa; 15248ad4d6ddSJeff Bonwick space_map_obj_t *smo = &vd->vdev_dtl_smo; 1525ecc2d604Sbonwick objset_t *mos = spa->spa_meta_objset; 1526fa9e4066Sahrens dmu_buf_t *db; 1527fa9e4066Sahrens int error; 1528fa9e4066Sahrens 1529fa9e4066Sahrens ASSERT(vd->vdev_children == 0); 1530fa9e4066Sahrens 1531fa9e4066Sahrens if (smo->smo_object == 0) 1532fa9e4066Sahrens return (0); 1533fa9e4066Sahrens 1534ecc2d604Sbonwick if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) 1535ea8dc4b6Seschrock return (error); 1536ecc2d604Sbonwick 15371934e92fSmaybee ASSERT3U(db->db_size, >=, sizeof (*smo)); 15381934e92fSmaybee bcopy(db->db_data, smo, sizeof (*smo)); 1539ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1540fa9e4066Sahrens 1541fa9e4066Sahrens mutex_enter(&vd->vdev_dtl_lock); 15428ad4d6ddSJeff Bonwick error = space_map_load(&vd->vdev_dtl[DTL_MISSING], 15438ad4d6ddSJeff Bonwick NULL, SM_ALLOC, smo, mos); 1544fa9e4066Sahrens mutex_exit(&vd->vdev_dtl_lock); 1545fa9e4066Sahrens 1546fa9e4066Sahrens return (error); 1547fa9e4066Sahrens } 1548fa9e4066Sahrens 1549fa9e4066Sahrens void 1550fa9e4066Sahrens vdev_dtl_sync(vdev_t *vd, uint64_t txg) 1551fa9e4066Sahrens { 1552fa9e4066Sahrens spa_t *spa = vd->vdev_spa; 15538ad4d6ddSJeff Bonwick space_map_obj_t *smo = &vd->vdev_dtl_smo; 15548ad4d6ddSJeff Bonwick space_map_t *sm = &vd->vdev_dtl[DTL_MISSING]; 1555ecc2d604Sbonwick objset_t *mos = spa->spa_meta_objset; 1556fa9e4066Sahrens space_map_t smsync; 1557fa9e4066Sahrens kmutex_t smlock; 1558fa9e4066Sahrens dmu_buf_t *db; 1559fa9e4066Sahrens dmu_tx_t *tx; 1560fa9e4066Sahrens 1561fa9e4066Sahrens tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 1562fa9e4066Sahrens 1563fa9e4066Sahrens if (vd->vdev_detached) { 1564fa9e4066Sahrens if (smo->smo_object != 0) { 1565ecc2d604Sbonwick int err = dmu_object_free(mos, smo->smo_object, tx); 1566fa9e4066Sahrens ASSERT3U(err, ==, 0); 1567fa9e4066Sahrens smo->smo_object = 0; 1568fa9e4066Sahrens } 1569fa9e4066Sahrens dmu_tx_commit(tx); 1570fa9e4066Sahrens return; 1571fa9e4066Sahrens } 1572fa9e4066Sahrens 1573fa9e4066Sahrens if (smo->smo_object == 0) { 1574fa9e4066Sahrens ASSERT(smo->smo_objsize == 0); 1575fa9e4066Sahrens ASSERT(smo->smo_alloc == 0); 1576ecc2d604Sbonwick smo->smo_object = dmu_object_alloc(mos, 1577fa9e4066Sahrens DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, 1578fa9e4066Sahrens DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); 1579fa9e4066Sahrens ASSERT(smo->smo_object != 0); 1580fa9e4066Sahrens vdev_config_dirty(vd->vdev_top); 1581fa9e4066Sahrens } 1582fa9e4066Sahrens 1583fa9e4066Sahrens mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); 1584fa9e4066Sahrens 1585fa9e4066Sahrens space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, 1586fa9e4066Sahrens &smlock); 1587fa9e4066Sahrens 1588fa9e4066Sahrens mutex_enter(&smlock); 1589fa9e4066Sahrens 1590fa9e4066Sahrens mutex_enter(&vd->vdev_dtl_lock); 1591ecc2d604Sbonwick space_map_walk(sm, space_map_add, &smsync); 1592fa9e4066Sahrens mutex_exit(&vd->vdev_dtl_lock); 1593fa9e4066Sahrens 1594ecc2d604Sbonwick space_map_truncate(smo, mos, tx); 1595ecc2d604Sbonwick space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); 1596fa9e4066Sahrens 1597fa9e4066Sahrens space_map_destroy(&smsync); 1598fa9e4066Sahrens 1599fa9e4066Sahrens mutex_exit(&smlock); 1600fa9e4066Sahrens mutex_destroy(&smlock); 1601fa9e4066Sahrens 1602ecc2d604Sbonwick VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); 1603fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 16041934e92fSmaybee ASSERT3U(db->db_size, >=, sizeof (*smo)); 16051934e92fSmaybee bcopy(smo, db->db_data, sizeof (*smo)); 1606ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1607fa9e4066Sahrens 1608fa9e4066Sahrens dmu_tx_commit(tx); 1609fa9e4066Sahrens } 1610fa9e4066Sahrens 16118ad4d6ddSJeff Bonwick /* 16128ad4d6ddSJeff Bonwick * Determine whether the specified vdev can be offlined/detached/removed 16138ad4d6ddSJeff Bonwick * without losing data. 16148ad4d6ddSJeff Bonwick */ 16158ad4d6ddSJeff Bonwick boolean_t 16168ad4d6ddSJeff Bonwick vdev_dtl_required(vdev_t *vd) 16178ad4d6ddSJeff Bonwick { 16188ad4d6ddSJeff Bonwick spa_t *spa = vd->vdev_spa; 16198ad4d6ddSJeff Bonwick vdev_t *tvd = vd->vdev_top; 16208ad4d6ddSJeff Bonwick uint8_t cant_read = vd->vdev_cant_read; 16218ad4d6ddSJeff Bonwick boolean_t required; 16228ad4d6ddSJeff Bonwick 16238ad4d6ddSJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 16248ad4d6ddSJeff Bonwick 16258ad4d6ddSJeff Bonwick if (vd == spa->spa_root_vdev || vd == tvd) 16268ad4d6ddSJeff Bonwick return (B_TRUE); 16278ad4d6ddSJeff Bonwick 16288ad4d6ddSJeff Bonwick /* 16298ad4d6ddSJeff Bonwick * Temporarily mark the device as unreadable, and then determine 16308ad4d6ddSJeff Bonwick * whether this results in any DTL outages in the top-level vdev. 16318ad4d6ddSJeff Bonwick * If not, we can safely offline/detach/remove the device. 16328ad4d6ddSJeff Bonwick */ 16338ad4d6ddSJeff Bonwick vd->vdev_cant_read = B_TRUE; 16348ad4d6ddSJeff Bonwick vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 16358ad4d6ddSJeff Bonwick required = !vdev_dtl_empty(tvd, DTL_OUTAGE); 16368ad4d6ddSJeff Bonwick vd->vdev_cant_read = cant_read; 16378ad4d6ddSJeff Bonwick vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 16388ad4d6ddSJeff Bonwick 16398ad4d6ddSJeff Bonwick return (required); 16408ad4d6ddSJeff Bonwick } 16418ad4d6ddSJeff Bonwick 1642088f3894Sahrens /* 1643088f3894Sahrens * Determine if resilver is needed, and if so the txg range. 1644088f3894Sahrens */ 1645088f3894Sahrens boolean_t 1646088f3894Sahrens vdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) 1647088f3894Sahrens { 1648088f3894Sahrens boolean_t needed = B_FALSE; 1649088f3894Sahrens uint64_t thismin = UINT64_MAX; 1650088f3894Sahrens uint64_t thismax = 0; 1651088f3894Sahrens 1652088f3894Sahrens if (vd->vdev_children == 0) { 1653088f3894Sahrens mutex_enter(&vd->vdev_dtl_lock); 16548ad4d6ddSJeff Bonwick if (vd->vdev_dtl[DTL_MISSING].sm_space != 0 && 16558ad4d6ddSJeff Bonwick vdev_writeable(vd)) { 1656088f3894Sahrens space_seg_t *ss; 1657088f3894Sahrens 16588ad4d6ddSJeff Bonwick ss = avl_first(&vd->vdev_dtl[DTL_MISSING].sm_root); 1659088f3894Sahrens thismin = ss->ss_start - 1; 16608ad4d6ddSJeff Bonwick ss = avl_last(&vd->vdev_dtl[DTL_MISSING].sm_root); 1661088f3894Sahrens thismax = ss->ss_end; 1662088f3894Sahrens needed = B_TRUE; 1663088f3894Sahrens } 1664088f3894Sahrens mutex_exit(&vd->vdev_dtl_lock); 1665088f3894Sahrens } else { 16668ad4d6ddSJeff Bonwick for (int c = 0; c < vd->vdev_children; c++) { 1667088f3894Sahrens vdev_t *cvd = vd->vdev_child[c]; 1668088f3894Sahrens uint64_t cmin, cmax; 1669088f3894Sahrens 1670088f3894Sahrens if (vdev_resilver_needed(cvd, &cmin, &cmax)) { 1671088f3894Sahrens thismin = MIN(thismin, cmin); 1672088f3894Sahrens thismax = MAX(thismax, cmax); 1673088f3894Sahrens needed = B_TRUE; 1674088f3894Sahrens } 1675088f3894Sahrens } 1676088f3894Sahrens } 1677088f3894Sahrens 1678088f3894Sahrens if (needed && minp) { 1679088f3894Sahrens *minp = thismin; 1680088f3894Sahrens *maxp = thismax; 1681088f3894Sahrens } 1682088f3894Sahrens return (needed); 1683088f3894Sahrens } 1684088f3894Sahrens 1685560e6e96Seschrock void 1686ea8dc4b6Seschrock vdev_load(vdev_t *vd) 1687fa9e4066Sahrens { 1688fa9e4066Sahrens /* 1689fa9e4066Sahrens * Recursively load all children. 1690fa9e4066Sahrens */ 16918ad4d6ddSJeff Bonwick for (int c = 0; c < vd->vdev_children; c++) 1692560e6e96Seschrock vdev_load(vd->vdev_child[c]); 1693fa9e4066Sahrens 1694fa9e4066Sahrens /* 16950e34b6a7Sbonwick * If this is a top-level vdev, initialize its metaslabs. 1696fa9e4066Sahrens */ 1697560e6e96Seschrock if (vd == vd->vdev_top && 1698560e6e96Seschrock (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || 1699560e6e96Seschrock vdev_metaslab_init(vd, 0) != 0)) 1700560e6e96Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1701560e6e96Seschrock VDEV_AUX_CORRUPT_DATA); 1702fa9e4066Sahrens 1703fa9e4066Sahrens /* 1704fa9e4066Sahrens * If this is a leaf vdev, load its DTL. 1705fa9e4066Sahrens */ 1706560e6e96Seschrock if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) 1707560e6e96Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1708560e6e96Seschrock VDEV_AUX_CORRUPT_DATA); 1709fa9e4066Sahrens } 1710fa9e4066Sahrens 171199653d4eSeschrock /* 1712fa94a07fSbrendan * The special vdev case is used for hot spares and l2cache devices. Its 1713fa94a07fSbrendan * sole purpose it to set the vdev state for the associated vdev. To do this, 1714fa94a07fSbrendan * we make sure that we can open the underlying device, then try to read the 1715fa94a07fSbrendan * label, and make sure that the label is sane and that it hasn't been 1716fa94a07fSbrendan * repurposed to another pool. 171799653d4eSeschrock */ 171899653d4eSeschrock int 1719fa94a07fSbrendan vdev_validate_aux(vdev_t *vd) 172099653d4eSeschrock { 172199653d4eSeschrock nvlist_t *label; 172299653d4eSeschrock uint64_t guid, version; 172399653d4eSeschrock uint64_t state; 172499653d4eSeschrock 1725e14bb325SJeff Bonwick if (!vdev_readable(vd)) 1726c5904d13Seschrock return (0); 1727c5904d13Seschrock 172899653d4eSeschrock if ((label = vdev_label_read_config(vd)) == NULL) { 172999653d4eSeschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 173099653d4eSeschrock VDEV_AUX_CORRUPT_DATA); 173199653d4eSeschrock return (-1); 173299653d4eSeschrock } 173399653d4eSeschrock 173499653d4eSeschrock if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || 1735e7437265Sahrens version > SPA_VERSION || 173699653d4eSeschrock nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || 173799653d4eSeschrock guid != vd->vdev_guid || 173899653d4eSeschrock nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { 173999653d4eSeschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 174099653d4eSeschrock VDEV_AUX_CORRUPT_DATA); 174199653d4eSeschrock nvlist_free(label); 174299653d4eSeschrock return (-1); 174399653d4eSeschrock } 174499653d4eSeschrock 174599653d4eSeschrock /* 174699653d4eSeschrock * We don't actually check the pool state here. If it's in fact in 174799653d4eSeschrock * use by another pool, we update this fact on the fly when requested. 174899653d4eSeschrock */ 174999653d4eSeschrock nvlist_free(label); 175099653d4eSeschrock return (0); 175199653d4eSeschrock } 175299653d4eSeschrock 1753fa9e4066Sahrens void 1754fa9e4066Sahrens vdev_sync_done(vdev_t *vd, uint64_t txg) 1755fa9e4066Sahrens { 1756fa9e4066Sahrens metaslab_t *msp; 1757fa9e4066Sahrens 1758fa9e4066Sahrens while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) 1759fa9e4066Sahrens metaslab_sync_done(msp, txg); 1760fa9e4066Sahrens } 1761fa9e4066Sahrens 1762fa9e4066Sahrens void 1763fa9e4066Sahrens vdev_sync(vdev_t *vd, uint64_t txg) 1764fa9e4066Sahrens { 1765fa9e4066Sahrens spa_t *spa = vd->vdev_spa; 1766fa9e4066Sahrens vdev_t *lvd; 1767fa9e4066Sahrens metaslab_t *msp; 1768ecc2d604Sbonwick dmu_tx_t *tx; 1769fa9e4066Sahrens 1770ecc2d604Sbonwick if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { 1771ecc2d604Sbonwick ASSERT(vd == vd->vdev_top); 1772ecc2d604Sbonwick tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 1773ecc2d604Sbonwick vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, 1774ecc2d604Sbonwick DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); 1775ecc2d604Sbonwick ASSERT(vd->vdev_ms_array != 0); 1776ecc2d604Sbonwick vdev_config_dirty(vd); 1777ecc2d604Sbonwick dmu_tx_commit(tx); 1778ecc2d604Sbonwick } 1779fa9e4066Sahrens 1780ecc2d604Sbonwick while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { 1781fa9e4066Sahrens metaslab_sync(msp, txg); 1782ecc2d604Sbonwick (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); 1783ecc2d604Sbonwick } 1784fa9e4066Sahrens 1785fa9e4066Sahrens while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) 1786fa9e4066Sahrens vdev_dtl_sync(lvd, txg); 1787fa9e4066Sahrens 1788fa9e4066Sahrens (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); 1789fa9e4066Sahrens } 1790fa9e4066Sahrens 1791fa9e4066Sahrens uint64_t 1792fa9e4066Sahrens vdev_psize_to_asize(vdev_t *vd, uint64_t psize) 1793fa9e4066Sahrens { 1794fa9e4066Sahrens return (vd->vdev_ops->vdev_op_asize(vd, psize)); 1795fa9e4066Sahrens } 1796fa9e4066Sahrens 17973d7072f8Seschrock /* 17983d7072f8Seschrock * Mark the given vdev faulted. A faulted vdev behaves as if the device could 17993d7072f8Seschrock * not be opened, and no I/O is attempted. 18003d7072f8Seschrock */ 1801fa9e4066Sahrens int 18023d7072f8Seschrock vdev_fault(spa_t *spa, uint64_t guid) 1803fa9e4066Sahrens { 1804c5904d13Seschrock vdev_t *vd; 1805fa9e4066Sahrens 1806e14bb325SJeff Bonwick spa_vdev_state_enter(spa); 1807fa9e4066Sahrens 1808c5904d13Seschrock if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 1809e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENODEV)); 1810e14bb325SJeff Bonwick 18113d7072f8Seschrock if (!vd->vdev_ops->vdev_op_leaf) 1812e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 1813fa9e4066Sahrens 18143d7072f8Seschrock /* 18153d7072f8Seschrock * Faulted state takes precedence over degraded. 18163d7072f8Seschrock */ 18173d7072f8Seschrock vd->vdev_faulted = 1ULL; 18183d7072f8Seschrock vd->vdev_degraded = 0ULL; 1819e14bb325SJeff Bonwick vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, VDEV_AUX_ERR_EXCEEDED); 18203d7072f8Seschrock 18213d7072f8Seschrock /* 18226988b9faSDavid Marker * If marking the vdev as faulted cause the top-level vdev to become 18233d7072f8Seschrock * unavailable, then back off and simply mark the vdev as degraded 18243d7072f8Seschrock * instead. 18253d7072f8Seschrock */ 1826c5904d13Seschrock if (vdev_is_dead(vd->vdev_top) && vd->vdev_aux == NULL) { 18273d7072f8Seschrock vd->vdev_degraded = 1ULL; 18283d7072f8Seschrock vd->vdev_faulted = 0ULL; 18293d7072f8Seschrock 18303d7072f8Seschrock /* 18313d7072f8Seschrock * If we reopen the device and it's not dead, only then do we 18323d7072f8Seschrock * mark it degraded. 18333d7072f8Seschrock */ 18343d7072f8Seschrock vdev_reopen(vd); 18353d7072f8Seschrock 18360a4e9518Sgw if (vdev_readable(vd)) { 18373d7072f8Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, 18383d7072f8Seschrock VDEV_AUX_ERR_EXCEEDED); 18393d7072f8Seschrock } 18403d7072f8Seschrock } 18413d7072f8Seschrock 1842e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, vd, 0)); 18433d7072f8Seschrock } 18443d7072f8Seschrock 18453d7072f8Seschrock /* 18463d7072f8Seschrock * Mark the given vdev degraded. A degraded vdev is purely an indication to the 18473d7072f8Seschrock * user that something is wrong. The vdev continues to operate as normal as far 18483d7072f8Seschrock * as I/O is concerned. 18493d7072f8Seschrock */ 18503d7072f8Seschrock int 18513d7072f8Seschrock vdev_degrade(spa_t *spa, uint64_t guid) 18523d7072f8Seschrock { 1853c5904d13Seschrock vdev_t *vd; 18540a4e9518Sgw 1855e14bb325SJeff Bonwick spa_vdev_state_enter(spa); 18563d7072f8Seschrock 1857c5904d13Seschrock if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 1858e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENODEV)); 1859e14bb325SJeff Bonwick 18600e34b6a7Sbonwick if (!vd->vdev_ops->vdev_op_leaf) 1861e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 18620e34b6a7Sbonwick 18633d7072f8Seschrock /* 18643d7072f8Seschrock * If the vdev is already faulted, then don't do anything. 18653d7072f8Seschrock */ 1866e14bb325SJeff Bonwick if (vd->vdev_faulted || vd->vdev_degraded) 1867e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, 0)); 18683d7072f8Seschrock 18693d7072f8Seschrock vd->vdev_degraded = 1ULL; 18703d7072f8Seschrock if (!vdev_is_dead(vd)) 18713d7072f8Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, 18723d7072f8Seschrock VDEV_AUX_ERR_EXCEEDED); 18733d7072f8Seschrock 1874e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, vd, 0)); 18753d7072f8Seschrock } 18763d7072f8Seschrock 18773d7072f8Seschrock /* 18783d7072f8Seschrock * Online the given vdev. If 'unspare' is set, it implies two things. First, 18793d7072f8Seschrock * any attached spare device should be detached when the device finishes 18803d7072f8Seschrock * resilvering. Second, the online should be treated like a 'test' online case, 18813d7072f8Seschrock * so no FMA events are generated if the device fails to open. 18823d7072f8Seschrock */ 18833d7072f8Seschrock int 1884e14bb325SJeff Bonwick vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) 18853d7072f8Seschrock { 1886c5904d13Seschrock vdev_t *vd; 18873d7072f8Seschrock 1888e14bb325SJeff Bonwick spa_vdev_state_enter(spa); 18893d7072f8Seschrock 1890c5904d13Seschrock if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 1891e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENODEV)); 18923d7072f8Seschrock 18933d7072f8Seschrock if (!vd->vdev_ops->vdev_op_leaf) 1894e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 1895fa9e4066Sahrens 1896fa9e4066Sahrens vd->vdev_offline = B_FALSE; 1897441d80aaSlling vd->vdev_tmpoffline = B_FALSE; 1898e14bb325SJeff Bonwick vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); 1899e14bb325SJeff Bonwick vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); 1900ea8dc4b6Seschrock vdev_reopen(vd->vdev_top); 19013d7072f8Seschrock vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; 19023d7072f8Seschrock 19033d7072f8Seschrock if (newstate) 19043d7072f8Seschrock *newstate = vd->vdev_state; 19053d7072f8Seschrock if ((flags & ZFS_ONLINE_UNSPARE) && 19063d7072f8Seschrock !vdev_is_dead(vd) && vd->vdev_parent && 19073d7072f8Seschrock vd->vdev_parent->vdev_ops == &vdev_spare_ops && 19083d7072f8Seschrock vd->vdev_parent->vdev_child[0] == vd) 19093d7072f8Seschrock vd->vdev_unspare = B_TRUE; 1910fa9e4066Sahrens 19118ad4d6ddSJeff Bonwick return (spa_vdev_state_exit(spa, vd, 0)); 1912fa9e4066Sahrens } 1913fa9e4066Sahrens 1914fa9e4066Sahrens int 19153d7072f8Seschrock vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) 1916fa9e4066Sahrens { 1917c5904d13Seschrock vdev_t *vd; 19180a4e9518Sgw 1919e14bb325SJeff Bonwick spa_vdev_state_enter(spa); 1920fa9e4066Sahrens 1921c5904d13Seschrock if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 1922e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENODEV)); 1923fa9e4066Sahrens 19240e34b6a7Sbonwick if (!vd->vdev_ops->vdev_op_leaf) 1925e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 19260e34b6a7Sbonwick 1927fa9e4066Sahrens /* 1928ecc2d604Sbonwick * If the device isn't already offline, try to offline it. 1929fa9e4066Sahrens */ 1930ecc2d604Sbonwick if (!vd->vdev_offline) { 1931ecc2d604Sbonwick /* 19328ad4d6ddSJeff Bonwick * If this device has the only valid copy of some data, 19338ad4d6ddSJeff Bonwick * don't allow it to be offlined. 1934ecc2d604Sbonwick */ 19358ad4d6ddSJeff Bonwick if (vd->vdev_aux == NULL && vdev_dtl_required(vd)) 1936e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, EBUSY)); 1937fa9e4066Sahrens 1938ecc2d604Sbonwick /* 1939ecc2d604Sbonwick * Offline this device and reopen its top-level vdev. 1940ecc2d604Sbonwick * If this action results in the top-level vdev becoming 1941ecc2d604Sbonwick * unusable, undo it and fail the request. 1942ecc2d604Sbonwick */ 1943ecc2d604Sbonwick vd->vdev_offline = B_TRUE; 1944ea8dc4b6Seschrock vdev_reopen(vd->vdev_top); 19458ad4d6ddSJeff Bonwick if (vd->vdev_aux == NULL && vdev_is_dead(vd->vdev_top)) { 1946ecc2d604Sbonwick vd->vdev_offline = B_FALSE; 1947ecc2d604Sbonwick vdev_reopen(vd->vdev_top); 1948e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, EBUSY)); 1949ecc2d604Sbonwick } 1950fa9e4066Sahrens } 1951fa9e4066Sahrens 1952e14bb325SJeff Bonwick vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); 1953ecc2d604Sbonwick 1954e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, vd, 0)); 1955fa9e4066Sahrens } 1956fa9e4066Sahrens 1957ea8dc4b6Seschrock /* 1958ea8dc4b6Seschrock * Clear the error counts associated with this vdev. Unlike vdev_online() and 1959ea8dc4b6Seschrock * vdev_offline(), we assume the spa config is locked. We also clear all 1960ea8dc4b6Seschrock * children. If 'vd' is NULL, then the user wants to clear all vdevs. 1961ea8dc4b6Seschrock */ 1962ea8dc4b6Seschrock void 1963e14bb325SJeff Bonwick vdev_clear(spa_t *spa, vdev_t *vd) 1964fa9e4066Sahrens { 1965e14bb325SJeff Bonwick vdev_t *rvd = spa->spa_root_vdev; 1966e14bb325SJeff Bonwick 1967e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1968fa9e4066Sahrens 1969ea8dc4b6Seschrock if (vd == NULL) 1970e14bb325SJeff Bonwick vd = rvd; 1971fa9e4066Sahrens 1972ea8dc4b6Seschrock vd->vdev_stat.vs_read_errors = 0; 1973ea8dc4b6Seschrock vd->vdev_stat.vs_write_errors = 0; 1974ea8dc4b6Seschrock vd->vdev_stat.vs_checksum_errors = 0; 1975fa9e4066Sahrens 1976e14bb325SJeff Bonwick for (int c = 0; c < vd->vdev_children; c++) 1977e14bb325SJeff Bonwick vdev_clear(spa, vd->vdev_child[c]); 19783d7072f8Seschrock 19793d7072f8Seschrock /* 19808a79c1b5Sek * If we're in the FAULTED state or have experienced failed I/O, then 19818a79c1b5Sek * clear the persistent state and attempt to reopen the device. We 19828a79c1b5Sek * also mark the vdev config dirty, so that the new faulted state is 19838a79c1b5Sek * written out to disk. 19843d7072f8Seschrock */ 1985e14bb325SJeff Bonwick if (vd->vdev_faulted || vd->vdev_degraded || 1986e14bb325SJeff Bonwick !vdev_readable(vd) || !vdev_writeable(vd)) { 19878a79c1b5Sek 19883d7072f8Seschrock vd->vdev_faulted = vd->vdev_degraded = 0; 1989e14bb325SJeff Bonwick vd->vdev_cant_read = B_FALSE; 1990e14bb325SJeff Bonwick vd->vdev_cant_write = B_FALSE; 1991e14bb325SJeff Bonwick 19923d7072f8Seschrock vdev_reopen(vd); 19933d7072f8Seschrock 1994e14bb325SJeff Bonwick if (vd != rvd) 1995e14bb325SJeff Bonwick vdev_state_dirty(vd->vdev_top); 1996e14bb325SJeff Bonwick 1997e14bb325SJeff Bonwick if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) 1998bb8b5132Sek spa_async_request(spa, SPA_ASYNC_RESILVER); 19993d7072f8Seschrock 20003d7072f8Seschrock spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR); 20013d7072f8Seschrock } 2002fa9e4066Sahrens } 2003fa9e4066Sahrens 2004e14bb325SJeff Bonwick boolean_t 2005e14bb325SJeff Bonwick vdev_is_dead(vdev_t *vd) 20060a4e9518Sgw { 2007e14bb325SJeff Bonwick return (vd->vdev_state < VDEV_STATE_DEGRADED); 20080a4e9518Sgw } 20090a4e9518Sgw 2010e14bb325SJeff Bonwick boolean_t 2011e14bb325SJeff Bonwick vdev_readable(vdev_t *vd) 20120a4e9518Sgw { 2013e14bb325SJeff Bonwick return (!vdev_is_dead(vd) && !vd->vdev_cant_read); 20140a4e9518Sgw } 20150a4e9518Sgw 2016e14bb325SJeff Bonwick boolean_t 2017e14bb325SJeff Bonwick vdev_writeable(vdev_t *vd) 2018fa9e4066Sahrens { 2019e14bb325SJeff Bonwick return (!vdev_is_dead(vd) && !vd->vdev_cant_write); 2020fa9e4066Sahrens } 2021fa9e4066Sahrens 2022a31e6787SGeorge Wilson boolean_t 2023a31e6787SGeorge Wilson vdev_allocatable(vdev_t *vd) 2024a31e6787SGeorge Wilson { 20258ad4d6ddSJeff Bonwick uint64_t state = vd->vdev_state; 20268ad4d6ddSJeff Bonwick 2027a31e6787SGeorge Wilson /* 20288ad4d6ddSJeff Bonwick * We currently allow allocations from vdevs which may be in the 2029a31e6787SGeorge Wilson * process of reopening (i.e. VDEV_STATE_CLOSED). If the device 2030a31e6787SGeorge Wilson * fails to reopen then we'll catch it later when we're holding 20318ad4d6ddSJeff Bonwick * the proper locks. Note that we have to get the vdev state 20328ad4d6ddSJeff Bonwick * in a local variable because although it changes atomically, 20338ad4d6ddSJeff Bonwick * we're asking two separate questions about it. 2034a31e6787SGeorge Wilson */ 20358ad4d6ddSJeff Bonwick return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) && 2036a31e6787SGeorge Wilson !vd->vdev_cant_write); 2037a31e6787SGeorge Wilson } 2038a31e6787SGeorge Wilson 2039e14bb325SJeff Bonwick boolean_t 2040e14bb325SJeff Bonwick vdev_accessible(vdev_t *vd, zio_t *zio) 2041fa9e4066Sahrens { 2042e14bb325SJeff Bonwick ASSERT(zio->io_vd == vd); 2043fa9e4066Sahrens 2044e14bb325SJeff Bonwick if (vdev_is_dead(vd) || vd->vdev_remove_wanted) 2045e14bb325SJeff Bonwick return (B_FALSE); 2046fa9e4066Sahrens 2047e14bb325SJeff Bonwick if (zio->io_type == ZIO_TYPE_READ) 2048e14bb325SJeff Bonwick return (!vd->vdev_cant_read); 2049fa9e4066Sahrens 2050e14bb325SJeff Bonwick if (zio->io_type == ZIO_TYPE_WRITE) 2051e14bb325SJeff Bonwick return (!vd->vdev_cant_write); 2052fa9e4066Sahrens 2053e14bb325SJeff Bonwick return (B_TRUE); 2054fa9e4066Sahrens } 2055fa9e4066Sahrens 2056fa9e4066Sahrens /* 2057fa9e4066Sahrens * Get statistics for the given vdev. 2058fa9e4066Sahrens */ 2059fa9e4066Sahrens void 2060fa9e4066Sahrens vdev_get_stats(vdev_t *vd, vdev_stat_t *vs) 2061fa9e4066Sahrens { 2062fa9e4066Sahrens vdev_t *rvd = vd->vdev_spa->spa_root_vdev; 2063fa9e4066Sahrens 2064fa9e4066Sahrens mutex_enter(&vd->vdev_stat_lock); 2065fa9e4066Sahrens bcopy(&vd->vdev_stat, vs, sizeof (*vs)); 2066088f3894Sahrens vs->vs_scrub_errors = vd->vdev_spa->spa_scrub_errors; 2067fa9e4066Sahrens vs->vs_timestamp = gethrtime() - vs->vs_timestamp; 2068fa9e4066Sahrens vs->vs_state = vd->vdev_state; 20692a79c5feSlling vs->vs_rsize = vdev_get_rsize(vd); 2070fa9e4066Sahrens mutex_exit(&vd->vdev_stat_lock); 2071fa9e4066Sahrens 2072fa9e4066Sahrens /* 2073fa9e4066Sahrens * If we're getting stats on the root vdev, aggregate the I/O counts 2074fa9e4066Sahrens * over all top-level vdevs (i.e. the direct children of the root). 2075fa9e4066Sahrens */ 2076fa9e4066Sahrens if (vd == rvd) { 2077e14bb325SJeff Bonwick for (int c = 0; c < rvd->vdev_children; c++) { 2078fa9e4066Sahrens vdev_t *cvd = rvd->vdev_child[c]; 2079fa9e4066Sahrens vdev_stat_t *cvs = &cvd->vdev_stat; 2080fa9e4066Sahrens 2081fa9e4066Sahrens mutex_enter(&vd->vdev_stat_lock); 2082e14bb325SJeff Bonwick for (int t = 0; t < ZIO_TYPES; t++) { 2083fa9e4066Sahrens vs->vs_ops[t] += cvs->vs_ops[t]; 2084fa9e4066Sahrens vs->vs_bytes[t] += cvs->vs_bytes[t]; 2085fa9e4066Sahrens } 2086fa9e4066Sahrens vs->vs_scrub_examined += cvs->vs_scrub_examined; 2087fa9e4066Sahrens mutex_exit(&vd->vdev_stat_lock); 2088fa9e4066Sahrens } 2089fa9e4066Sahrens } 2090fa9e4066Sahrens } 2091fa9e4066Sahrens 2092fa94a07fSbrendan void 2093fa94a07fSbrendan vdev_clear_stats(vdev_t *vd) 2094fa94a07fSbrendan { 2095fa94a07fSbrendan mutex_enter(&vd->vdev_stat_lock); 2096fa94a07fSbrendan vd->vdev_stat.vs_space = 0; 2097fa94a07fSbrendan vd->vdev_stat.vs_dspace = 0; 2098fa94a07fSbrendan vd->vdev_stat.vs_alloc = 0; 2099fa94a07fSbrendan mutex_exit(&vd->vdev_stat_lock); 2100fa94a07fSbrendan } 2101fa94a07fSbrendan 2102fa9e4066Sahrens void 2103e14bb325SJeff Bonwick vdev_stat_update(zio_t *zio, uint64_t psize) 2104fa9e4066Sahrens { 21058ad4d6ddSJeff Bonwick spa_t *spa = zio->io_spa; 21068ad4d6ddSJeff Bonwick vdev_t *rvd = spa->spa_root_vdev; 2107e14bb325SJeff Bonwick vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; 2108fa9e4066Sahrens vdev_t *pvd; 2109fa9e4066Sahrens uint64_t txg = zio->io_txg; 2110fa9e4066Sahrens vdev_stat_t *vs = &vd->vdev_stat; 2111fa9e4066Sahrens zio_type_t type = zio->io_type; 2112fa9e4066Sahrens int flags = zio->io_flags; 2113fa9e4066Sahrens 2114e14bb325SJeff Bonwick /* 2115e14bb325SJeff Bonwick * If this i/o is a gang leader, it didn't do any actual work. 2116e14bb325SJeff Bonwick */ 2117e14bb325SJeff Bonwick if (zio->io_gang_tree) 2118e14bb325SJeff Bonwick return; 2119e14bb325SJeff Bonwick 2120fa9e4066Sahrens if (zio->io_error == 0) { 2121e14bb325SJeff Bonwick /* 2122e14bb325SJeff Bonwick * If this is a root i/o, don't count it -- we've already 2123e14bb325SJeff Bonwick * counted the top-level vdevs, and vdev_get_stats() will 2124e14bb325SJeff Bonwick * aggregate them when asked. This reduces contention on 2125e14bb325SJeff Bonwick * the root vdev_stat_lock and implicitly handles blocks 2126e14bb325SJeff Bonwick * that compress away to holes, for which there is no i/o. 2127e14bb325SJeff Bonwick * (Holes never create vdev children, so all the counters 2128e14bb325SJeff Bonwick * remain zero, which is what we want.) 2129e14bb325SJeff Bonwick * 2130e14bb325SJeff Bonwick * Note: this only applies to successful i/o (io_error == 0) 2131e14bb325SJeff Bonwick * because unlike i/o counts, errors are not additive. 2132e14bb325SJeff Bonwick * When reading a ditto block, for example, failure of 2133e14bb325SJeff Bonwick * one top-level vdev does not imply a root-level error. 2134e14bb325SJeff Bonwick */ 2135e14bb325SJeff Bonwick if (vd == rvd) 2136e14bb325SJeff Bonwick return; 2137e14bb325SJeff Bonwick 2138e14bb325SJeff Bonwick ASSERT(vd == zio->io_vd); 21398ad4d6ddSJeff Bonwick 21408ad4d6ddSJeff Bonwick if (flags & ZIO_FLAG_IO_BYPASS) 21418ad4d6ddSJeff Bonwick return; 21428ad4d6ddSJeff Bonwick 21438ad4d6ddSJeff Bonwick mutex_enter(&vd->vdev_stat_lock); 21448ad4d6ddSJeff Bonwick 2145e14bb325SJeff Bonwick if (flags & ZIO_FLAG_IO_REPAIR) { 2146d80c45e0Sbonwick if (flags & ZIO_FLAG_SCRUB_THREAD) 2147e14bb325SJeff Bonwick vs->vs_scrub_repaired += psize; 21488ad4d6ddSJeff Bonwick if (flags & ZIO_FLAG_SELF_HEAL) 2149e14bb325SJeff Bonwick vs->vs_self_healed += psize; 2150fa9e4066Sahrens } 21518ad4d6ddSJeff Bonwick 21528ad4d6ddSJeff Bonwick vs->vs_ops[type]++; 21538ad4d6ddSJeff Bonwick vs->vs_bytes[type] += psize; 21548ad4d6ddSJeff Bonwick 21558ad4d6ddSJeff Bonwick mutex_exit(&vd->vdev_stat_lock); 2156fa9e4066Sahrens return; 2157fa9e4066Sahrens } 2158fa9e4066Sahrens 2159fa9e4066Sahrens if (flags & ZIO_FLAG_SPECULATIVE) 2160fa9e4066Sahrens return; 2161fa9e4066Sahrens 2162e14bb325SJeff Bonwick mutex_enter(&vd->vdev_stat_lock); 2163b47119fdSGeorge Wilson if (type == ZIO_TYPE_READ && !vdev_is_dead(vd)) { 2164e14bb325SJeff Bonwick if (zio->io_error == ECKSUM) 2165e14bb325SJeff Bonwick vs->vs_checksum_errors++; 2166e14bb325SJeff Bonwick else 2167e14bb325SJeff Bonwick vs->vs_read_errors++; 2168fa9e4066Sahrens } 2169b47119fdSGeorge Wilson if (type == ZIO_TYPE_WRITE && !vdev_is_dead(vd)) 2170e14bb325SJeff Bonwick vs->vs_write_errors++; 2171e14bb325SJeff Bonwick mutex_exit(&vd->vdev_stat_lock); 2172fa9e4066Sahrens 21738ad4d6ddSJeff Bonwick if (type == ZIO_TYPE_WRITE && txg != 0 && 21748ad4d6ddSJeff Bonwick (!(flags & ZIO_FLAG_IO_REPAIR) || 21758ad4d6ddSJeff Bonwick (flags & ZIO_FLAG_SCRUB_THREAD))) { 21768ad4d6ddSJeff Bonwick /* 21778ad4d6ddSJeff Bonwick * This is either a normal write (not a repair), or it's a 21788ad4d6ddSJeff Bonwick * repair induced by the scrub thread. In the normal case, 21798ad4d6ddSJeff Bonwick * we commit the DTL change in the same txg as the block 21808ad4d6ddSJeff Bonwick * was born. In the scrub-induced repair case, we know that 21818ad4d6ddSJeff Bonwick * scrubs run in first-pass syncing context, so we commit 21828ad4d6ddSJeff Bonwick * the DTL change in spa->spa_syncing_txg. 21838ad4d6ddSJeff Bonwick * 21848ad4d6ddSJeff Bonwick * We currently do not make DTL entries for failed spontaneous 21858ad4d6ddSJeff Bonwick * self-healing writes triggered by normal (non-scrubbing) 21868ad4d6ddSJeff Bonwick * reads, because we have no transactional context in which to 21878ad4d6ddSJeff Bonwick * do so -- and it's not clear that it'd be desirable anyway. 21888ad4d6ddSJeff Bonwick */ 21898ad4d6ddSJeff Bonwick if (vd->vdev_ops->vdev_op_leaf) { 21908ad4d6ddSJeff Bonwick uint64_t commit_txg = txg; 21918ad4d6ddSJeff Bonwick if (flags & ZIO_FLAG_SCRUB_THREAD) { 21928ad4d6ddSJeff Bonwick ASSERT(flags & ZIO_FLAG_IO_REPAIR); 21938ad4d6ddSJeff Bonwick ASSERT(spa_sync_pass(spa) == 1); 21948ad4d6ddSJeff Bonwick vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1); 21958ad4d6ddSJeff Bonwick commit_txg = spa->spa_syncing_txg; 21968ad4d6ddSJeff Bonwick } 21978ad4d6ddSJeff Bonwick ASSERT(commit_txg >= spa->spa_syncing_txg); 21988ad4d6ddSJeff Bonwick if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1)) 2199fa9e4066Sahrens return; 22008ad4d6ddSJeff Bonwick for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 22018ad4d6ddSJeff Bonwick vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1); 22028ad4d6ddSJeff Bonwick vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg); 2203fa9e4066Sahrens } 22048ad4d6ddSJeff Bonwick if (vd != rvd) 22058ad4d6ddSJeff Bonwick vdev_dtl_dirty(vd, DTL_MISSING, txg, 1); 2206fa9e4066Sahrens } 2207fa9e4066Sahrens } 2208fa9e4066Sahrens 2209fa9e4066Sahrens void 2210fa9e4066Sahrens vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, boolean_t complete) 2211fa9e4066Sahrens { 2212fa9e4066Sahrens int c; 2213fa9e4066Sahrens vdev_stat_t *vs = &vd->vdev_stat; 2214fa9e4066Sahrens 2215fa9e4066Sahrens for (c = 0; c < vd->vdev_children; c++) 2216fa9e4066Sahrens vdev_scrub_stat_update(vd->vdev_child[c], type, complete); 2217fa9e4066Sahrens 2218fa9e4066Sahrens mutex_enter(&vd->vdev_stat_lock); 2219fa9e4066Sahrens 2220fa9e4066Sahrens if (type == POOL_SCRUB_NONE) { 2221fa9e4066Sahrens /* 2222fa9e4066Sahrens * Update completion and end time. Leave everything else alone 2223fa9e4066Sahrens * so we can report what happened during the previous scrub. 2224fa9e4066Sahrens */ 2225fa9e4066Sahrens vs->vs_scrub_complete = complete; 2226fa9e4066Sahrens vs->vs_scrub_end = gethrestime_sec(); 2227fa9e4066Sahrens } else { 2228fa9e4066Sahrens vs->vs_scrub_type = type; 2229fa9e4066Sahrens vs->vs_scrub_complete = 0; 2230fa9e4066Sahrens vs->vs_scrub_examined = 0; 2231fa9e4066Sahrens vs->vs_scrub_repaired = 0; 2232fa9e4066Sahrens vs->vs_scrub_start = gethrestime_sec(); 2233fa9e4066Sahrens vs->vs_scrub_end = 0; 2234fa9e4066Sahrens } 2235fa9e4066Sahrens 2236fa9e4066Sahrens mutex_exit(&vd->vdev_stat_lock); 2237fa9e4066Sahrens } 2238fa9e4066Sahrens 2239fa9e4066Sahrens /* 2240fa9e4066Sahrens * Update the in-core space usage stats for this vdev and the root vdev. 2241fa9e4066Sahrens */ 2242fa9e4066Sahrens void 2243fa94a07fSbrendan vdev_space_update(vdev_t *vd, int64_t space_delta, int64_t alloc_delta, 2244fa94a07fSbrendan boolean_t update_root) 2245fa9e4066Sahrens { 224699653d4eSeschrock int64_t dspace_delta = space_delta; 22478654d025Sperrin spa_t *spa = vd->vdev_spa; 22488654d025Sperrin vdev_t *rvd = spa->spa_root_vdev; 2249fa9e4066Sahrens 22508654d025Sperrin ASSERT(vd == vd->vdev_top); 225199653d4eSeschrock 22528654d025Sperrin /* 22538654d025Sperrin * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion 22548654d025Sperrin * factor. We must calculate this here and not at the root vdev 22558654d025Sperrin * because the root vdev's psize-to-asize is simply the max of its 22568654d025Sperrin * childrens', thus not accurate enough for us. 22578654d025Sperrin */ 22588654d025Sperrin ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); 22598654d025Sperrin dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * 22608654d025Sperrin vd->vdev_deflate_ratio; 22618654d025Sperrin 22628654d025Sperrin mutex_enter(&vd->vdev_stat_lock); 22638654d025Sperrin vd->vdev_stat.vs_space += space_delta; 22648654d025Sperrin vd->vdev_stat.vs_alloc += alloc_delta; 22658654d025Sperrin vd->vdev_stat.vs_dspace += dspace_delta; 22668654d025Sperrin mutex_exit(&vd->vdev_stat_lock); 22678654d025Sperrin 2268fa94a07fSbrendan if (update_root) { 2269fa94a07fSbrendan ASSERT(rvd == vd->vdev_parent); 2270fa94a07fSbrendan ASSERT(vd->vdev_ms_count != 0); 2271fa94a07fSbrendan 2272fa94a07fSbrendan /* 2273fa94a07fSbrendan * Don't count non-normal (e.g. intent log) space as part of 2274fa94a07fSbrendan * the pool's capacity. 2275fa94a07fSbrendan */ 2276fa94a07fSbrendan if (vd->vdev_mg->mg_class != spa->spa_normal_class) 2277fa94a07fSbrendan return; 22788654d025Sperrin 2279fa94a07fSbrendan mutex_enter(&rvd->vdev_stat_lock); 2280fa94a07fSbrendan rvd->vdev_stat.vs_space += space_delta; 2281fa94a07fSbrendan rvd->vdev_stat.vs_alloc += alloc_delta; 2282fa94a07fSbrendan rvd->vdev_stat.vs_dspace += dspace_delta; 2283fa94a07fSbrendan mutex_exit(&rvd->vdev_stat_lock); 2284fa94a07fSbrendan } 2285fa9e4066Sahrens } 2286fa9e4066Sahrens 2287fa9e4066Sahrens /* 2288fa9e4066Sahrens * Mark a top-level vdev's config as dirty, placing it on the dirty list 2289fa9e4066Sahrens * so that it will be written out next time the vdev configuration is synced. 2290fa9e4066Sahrens * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. 2291fa9e4066Sahrens */ 2292fa9e4066Sahrens void 2293fa9e4066Sahrens vdev_config_dirty(vdev_t *vd) 2294fa9e4066Sahrens { 2295fa9e4066Sahrens spa_t *spa = vd->vdev_spa; 2296fa9e4066Sahrens vdev_t *rvd = spa->spa_root_vdev; 2297fa9e4066Sahrens int c; 2298fa9e4066Sahrens 2299c5904d13Seschrock /* 2300*6809eb4eSEric Schrock * If this is an aux vdev (as with l2cache and spare devices), then we 2301*6809eb4eSEric Schrock * update the vdev config manually and set the sync flag. 2302c5904d13Seschrock */ 2303c5904d13Seschrock if (vd->vdev_aux != NULL) { 2304c5904d13Seschrock spa_aux_vdev_t *sav = vd->vdev_aux; 2305c5904d13Seschrock nvlist_t **aux; 2306c5904d13Seschrock uint_t naux; 2307c5904d13Seschrock 2308c5904d13Seschrock for (c = 0; c < sav->sav_count; c++) { 2309c5904d13Seschrock if (sav->sav_vdevs[c] == vd) 2310c5904d13Seschrock break; 2311c5904d13Seschrock } 2312c5904d13Seschrock 2313e14bb325SJeff Bonwick if (c == sav->sav_count) { 2314e14bb325SJeff Bonwick /* 2315e14bb325SJeff Bonwick * We're being removed. There's nothing more to do. 2316e14bb325SJeff Bonwick */ 2317e14bb325SJeff Bonwick ASSERT(sav->sav_sync == B_TRUE); 2318e14bb325SJeff Bonwick return; 2319e14bb325SJeff Bonwick } 2320e14bb325SJeff Bonwick 2321c5904d13Seschrock sav->sav_sync = B_TRUE; 2322c5904d13Seschrock 2323*6809eb4eSEric Schrock if (nvlist_lookup_nvlist_array(sav->sav_config, 2324*6809eb4eSEric Schrock ZPOOL_CONFIG_L2CACHE, &aux, &naux) != 0) { 2325*6809eb4eSEric Schrock VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 2326*6809eb4eSEric Schrock ZPOOL_CONFIG_SPARES, &aux, &naux) == 0); 2327*6809eb4eSEric Schrock } 2328c5904d13Seschrock 2329c5904d13Seschrock ASSERT(c < naux); 2330c5904d13Seschrock 2331c5904d13Seschrock /* 2332c5904d13Seschrock * Setting the nvlist in the middle if the array is a little 2333c5904d13Seschrock * sketchy, but it will work. 2334c5904d13Seschrock */ 2335c5904d13Seschrock nvlist_free(aux[c]); 2336c5904d13Seschrock aux[c] = vdev_config_generate(spa, vd, B_TRUE, B_FALSE, B_TRUE); 2337c5904d13Seschrock 2338c5904d13Seschrock return; 2339c5904d13Seschrock } 2340c5904d13Seschrock 23415dabedeeSbonwick /* 2342e14bb325SJeff Bonwick * The dirty list is protected by the SCL_CONFIG lock. The caller 2343e14bb325SJeff Bonwick * must either hold SCL_CONFIG as writer, or must be the sync thread 2344e14bb325SJeff Bonwick * (which holds SCL_CONFIG as reader). There's only one sync thread, 23455dabedeeSbonwick * so this is sufficient to ensure mutual exclusion. 23465dabedeeSbonwick */ 2347e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 2348e14bb325SJeff Bonwick (dsl_pool_sync_context(spa_get_dsl(spa)) && 2349e14bb325SJeff Bonwick spa_config_held(spa, SCL_CONFIG, RW_READER))); 23505dabedeeSbonwick 2351fa9e4066Sahrens if (vd == rvd) { 2352fa9e4066Sahrens for (c = 0; c < rvd->vdev_children; c++) 2353fa9e4066Sahrens vdev_config_dirty(rvd->vdev_child[c]); 2354fa9e4066Sahrens } else { 2355fa9e4066Sahrens ASSERT(vd == vd->vdev_top); 2356fa9e4066Sahrens 2357e14bb325SJeff Bonwick if (!list_link_active(&vd->vdev_config_dirty_node)) 2358e14bb325SJeff Bonwick list_insert_head(&spa->spa_config_dirty_list, vd); 2359fa9e4066Sahrens } 2360fa9e4066Sahrens } 2361fa9e4066Sahrens 2362fa9e4066Sahrens void 2363fa9e4066Sahrens vdev_config_clean(vdev_t *vd) 2364fa9e4066Sahrens { 23655dabedeeSbonwick spa_t *spa = vd->vdev_spa; 23665dabedeeSbonwick 2367e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 2368e14bb325SJeff Bonwick (dsl_pool_sync_context(spa_get_dsl(spa)) && 2369e14bb325SJeff Bonwick spa_config_held(spa, SCL_CONFIG, RW_READER))); 23705dabedeeSbonwick 2371e14bb325SJeff Bonwick ASSERT(list_link_active(&vd->vdev_config_dirty_node)); 2372e14bb325SJeff Bonwick list_remove(&spa->spa_config_dirty_list, vd); 2373e14bb325SJeff Bonwick } 2374e14bb325SJeff Bonwick 2375e14bb325SJeff Bonwick /* 2376e14bb325SJeff Bonwick * Mark a top-level vdev's state as dirty, so that the next pass of 2377e14bb325SJeff Bonwick * spa_sync() can convert this into vdev_config_dirty(). We distinguish 2378e14bb325SJeff Bonwick * the state changes from larger config changes because they require 2379e14bb325SJeff Bonwick * much less locking, and are often needed for administrative actions. 2380e14bb325SJeff Bonwick */ 2381e14bb325SJeff Bonwick void 2382e14bb325SJeff Bonwick vdev_state_dirty(vdev_t *vd) 2383e14bb325SJeff Bonwick { 2384e14bb325SJeff Bonwick spa_t *spa = vd->vdev_spa; 2385e14bb325SJeff Bonwick 2386e14bb325SJeff Bonwick ASSERT(vd == vd->vdev_top); 2387e14bb325SJeff Bonwick 2388e14bb325SJeff Bonwick /* 2389e14bb325SJeff Bonwick * The state list is protected by the SCL_STATE lock. The caller 2390e14bb325SJeff Bonwick * must either hold SCL_STATE as writer, or must be the sync thread 2391e14bb325SJeff Bonwick * (which holds SCL_STATE as reader). There's only one sync thread, 2392e14bb325SJeff Bonwick * so this is sufficient to ensure mutual exclusion. 2393e14bb325SJeff Bonwick */ 2394e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 2395e14bb325SJeff Bonwick (dsl_pool_sync_context(spa_get_dsl(spa)) && 2396e14bb325SJeff Bonwick spa_config_held(spa, SCL_STATE, RW_READER))); 2397e14bb325SJeff Bonwick 2398e14bb325SJeff Bonwick if (!list_link_active(&vd->vdev_state_dirty_node)) 2399e14bb325SJeff Bonwick list_insert_head(&spa->spa_state_dirty_list, vd); 2400e14bb325SJeff Bonwick } 2401e14bb325SJeff Bonwick 2402e14bb325SJeff Bonwick void 2403e14bb325SJeff Bonwick vdev_state_clean(vdev_t *vd) 2404e14bb325SJeff Bonwick { 2405e14bb325SJeff Bonwick spa_t *spa = vd->vdev_spa; 2406e14bb325SJeff Bonwick 2407e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 2408e14bb325SJeff Bonwick (dsl_pool_sync_context(spa_get_dsl(spa)) && 2409e14bb325SJeff Bonwick spa_config_held(spa, SCL_STATE, RW_READER))); 2410e14bb325SJeff Bonwick 2411e14bb325SJeff Bonwick ASSERT(list_link_active(&vd->vdev_state_dirty_node)); 2412e14bb325SJeff Bonwick list_remove(&spa->spa_state_dirty_list, vd); 2413fa9e4066Sahrens } 2414fa9e4066Sahrens 241532b87932Sek /* 241632b87932Sek * Propagate vdev state up from children to parent. 241732b87932Sek */ 241844cd46caSbillm void 241944cd46caSbillm vdev_propagate_state(vdev_t *vd) 242044cd46caSbillm { 24218ad4d6ddSJeff Bonwick spa_t *spa = vd->vdev_spa; 24228ad4d6ddSJeff Bonwick vdev_t *rvd = spa->spa_root_vdev; 242344cd46caSbillm int degraded = 0, faulted = 0; 242444cd46caSbillm int corrupted = 0; 242544cd46caSbillm int c; 242644cd46caSbillm vdev_t *child; 242744cd46caSbillm 24283d7072f8Seschrock if (vd->vdev_children > 0) { 24293d7072f8Seschrock for (c = 0; c < vd->vdev_children; c++) { 24303d7072f8Seschrock child = vd->vdev_child[c]; 243151ece835Seschrock 2432e14bb325SJeff Bonwick if (!vdev_readable(child) || 24338ad4d6ddSJeff Bonwick (!vdev_writeable(child) && spa_writeable(spa))) { 243451ece835Seschrock /* 243551ece835Seschrock * Root special: if there is a top-level log 243651ece835Seschrock * device, treat the root vdev as if it were 243751ece835Seschrock * degraded. 243851ece835Seschrock */ 243951ece835Seschrock if (child->vdev_islog && vd == rvd) 244051ece835Seschrock degraded++; 244151ece835Seschrock else 244251ece835Seschrock faulted++; 244351ece835Seschrock } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { 24443d7072f8Seschrock degraded++; 244551ece835Seschrock } 244644cd46caSbillm 24473d7072f8Seschrock if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) 24483d7072f8Seschrock corrupted++; 24493d7072f8Seschrock } 245044cd46caSbillm 24513d7072f8Seschrock vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); 24523d7072f8Seschrock 24533d7072f8Seschrock /* 2454e14bb325SJeff Bonwick * Root special: if there is a top-level vdev that cannot be 24553d7072f8Seschrock * opened due to corrupted metadata, then propagate the root 24563d7072f8Seschrock * vdev's aux state as 'corrupt' rather than 'insufficient 24573d7072f8Seschrock * replicas'. 24583d7072f8Seschrock */ 24593d7072f8Seschrock if (corrupted && vd == rvd && 24603d7072f8Seschrock rvd->vdev_state == VDEV_STATE_CANT_OPEN) 24613d7072f8Seschrock vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, 24623d7072f8Seschrock VDEV_AUX_CORRUPT_DATA); 24633d7072f8Seschrock } 24643d7072f8Seschrock 246551ece835Seschrock if (vd->vdev_parent) 24663d7072f8Seschrock vdev_propagate_state(vd->vdev_parent); 246744cd46caSbillm } 246844cd46caSbillm 2469fa9e4066Sahrens /* 2470ea8dc4b6Seschrock * Set a vdev's state. If this is during an open, we don't update the parent 2471ea8dc4b6Seschrock * state, because we're in the process of opening children depth-first. 2472ea8dc4b6Seschrock * Otherwise, we propagate the change to the parent. 2473ea8dc4b6Seschrock * 2474ea8dc4b6Seschrock * If this routine places a device in a faulted state, an appropriate ereport is 2475ea8dc4b6Seschrock * generated. 2476fa9e4066Sahrens */ 2477fa9e4066Sahrens void 2478ea8dc4b6Seschrock vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) 2479fa9e4066Sahrens { 2480560e6e96Seschrock uint64_t save_state; 2481c5904d13Seschrock spa_t *spa = vd->vdev_spa; 2482ea8dc4b6Seschrock 2483ea8dc4b6Seschrock if (state == vd->vdev_state) { 2484ea8dc4b6Seschrock vd->vdev_stat.vs_aux = aux; 2485fa9e4066Sahrens return; 2486ea8dc4b6Seschrock } 2487ea8dc4b6Seschrock 2488560e6e96Seschrock save_state = vd->vdev_state; 2489fa9e4066Sahrens 2490fa9e4066Sahrens vd->vdev_state = state; 2491fa9e4066Sahrens vd->vdev_stat.vs_aux = aux; 2492fa9e4066Sahrens 24933d7072f8Seschrock /* 24943d7072f8Seschrock * If we are setting the vdev state to anything but an open state, then 24953d7072f8Seschrock * always close the underlying device. Otherwise, we keep accessible 24963d7072f8Seschrock * but invalid devices open forever. We don't call vdev_close() itself, 24973d7072f8Seschrock * because that implies some extra checks (offline, etc) that we don't 24983d7072f8Seschrock * want here. This is limited to leaf devices, because otherwise 24993d7072f8Seschrock * closing the device will affect other children. 25003d7072f8Seschrock */ 2501cbd2b15eSJeff Bonwick if (vdev_is_dead(vd) && vd->vdev_ops->vdev_op_leaf) 25023d7072f8Seschrock vd->vdev_ops->vdev_op_close(vd); 25033d7072f8Seschrock 25043d7072f8Seschrock if (vd->vdev_removed && 25053d7072f8Seschrock state == VDEV_STATE_CANT_OPEN && 25063d7072f8Seschrock (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { 25073d7072f8Seschrock /* 25083d7072f8Seschrock * If the previous state is set to VDEV_STATE_REMOVED, then this 25093d7072f8Seschrock * device was previously marked removed and someone attempted to 25103d7072f8Seschrock * reopen it. If this failed due to a nonexistent device, then 25113d7072f8Seschrock * keep the device in the REMOVED state. We also let this be if 25123d7072f8Seschrock * it is one of our special test online cases, which is only 25133d7072f8Seschrock * attempting to online the device and shouldn't generate an FMA 25143d7072f8Seschrock * fault. 25153d7072f8Seschrock */ 25163d7072f8Seschrock vd->vdev_state = VDEV_STATE_REMOVED; 25173d7072f8Seschrock vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 25183d7072f8Seschrock } else if (state == VDEV_STATE_REMOVED) { 25193d7072f8Seschrock /* 25203d7072f8Seschrock * Indicate to the ZFS DE that this device has been removed, and 25213d7072f8Seschrock * any recent errors should be ignored. 25223d7072f8Seschrock */ 2523c5904d13Seschrock zfs_post_remove(spa, vd); 25243d7072f8Seschrock vd->vdev_removed = B_TRUE; 25253d7072f8Seschrock } else if (state == VDEV_STATE_CANT_OPEN) { 2526ea8dc4b6Seschrock /* 2527ea8dc4b6Seschrock * If we fail to open a vdev during an import, we mark it as 2528ea8dc4b6Seschrock * "not available", which signifies that it was never there to 2529ea8dc4b6Seschrock * begin with. Failure to open such a device is not considered 2530ea8dc4b6Seschrock * an error. 2531ea8dc4b6Seschrock */ 2532c5904d13Seschrock if (spa->spa_load_state == SPA_LOAD_IMPORT && 2533560e6e96Seschrock vd->vdev_ops->vdev_op_leaf) 2534560e6e96Seschrock vd->vdev_not_present = 1; 2535560e6e96Seschrock 2536560e6e96Seschrock /* 2537560e6e96Seschrock * Post the appropriate ereport. If the 'prevstate' field is 2538560e6e96Seschrock * set to something other than VDEV_STATE_UNKNOWN, it indicates 2539560e6e96Seschrock * that this is part of a vdev_reopen(). In this case, we don't 2540560e6e96Seschrock * want to post the ereport if the device was already in the 2541560e6e96Seschrock * CANT_OPEN state beforehand. 25423d7072f8Seschrock * 25433d7072f8Seschrock * If the 'checkremove' flag is set, then this is an attempt to 25443d7072f8Seschrock * online the device in response to an insertion event. If we 25453d7072f8Seschrock * hit this case, then we have detected an insertion event for a 25463d7072f8Seschrock * faulted or offline device that wasn't in the removed state. 25473d7072f8Seschrock * In this scenario, we don't post an ereport because we are 25483d7072f8Seschrock * about to replace the device, or attempt an online with 25493d7072f8Seschrock * vdev_forcefault, which will generate the fault for us. 2550560e6e96Seschrock */ 25513d7072f8Seschrock if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && 25523d7072f8Seschrock !vd->vdev_not_present && !vd->vdev_checkremove && 2553c5904d13Seschrock vd != spa->spa_root_vdev) { 2554ea8dc4b6Seschrock const char *class; 2555ea8dc4b6Seschrock 2556ea8dc4b6Seschrock switch (aux) { 2557ea8dc4b6Seschrock case VDEV_AUX_OPEN_FAILED: 2558ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; 2559ea8dc4b6Seschrock break; 2560ea8dc4b6Seschrock case VDEV_AUX_CORRUPT_DATA: 2561ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; 2562ea8dc4b6Seschrock break; 2563ea8dc4b6Seschrock case VDEV_AUX_NO_REPLICAS: 2564ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; 2565ea8dc4b6Seschrock break; 2566ea8dc4b6Seschrock case VDEV_AUX_BAD_GUID_SUM: 2567ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; 2568ea8dc4b6Seschrock break; 2569ea8dc4b6Seschrock case VDEV_AUX_TOO_SMALL: 2570ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; 2571ea8dc4b6Seschrock break; 2572ea8dc4b6Seschrock case VDEV_AUX_BAD_LABEL: 2573ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; 2574ea8dc4b6Seschrock break; 2575e14bb325SJeff Bonwick case VDEV_AUX_IO_FAILURE: 2576e14bb325SJeff Bonwick class = FM_EREPORT_ZFS_IO_FAILURE; 2577e14bb325SJeff Bonwick break; 2578ea8dc4b6Seschrock default: 2579ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; 2580ea8dc4b6Seschrock } 2581ea8dc4b6Seschrock 2582c5904d13Seschrock zfs_ereport_post(class, spa, vd, NULL, save_state, 0); 2583ea8dc4b6Seschrock } 2584ea8dc4b6Seschrock 25853d7072f8Seschrock /* Erase any notion of persistent removed state */ 25863d7072f8Seschrock vd->vdev_removed = B_FALSE; 25873d7072f8Seschrock } else { 25883d7072f8Seschrock vd->vdev_removed = B_FALSE; 25893d7072f8Seschrock } 2590ea8dc4b6Seschrock 25913d7072f8Seschrock if (!isopen) 25923d7072f8Seschrock vdev_propagate_state(vd); 2593fa9e4066Sahrens } 259415e6edf1Sgw 259515e6edf1Sgw /* 259615e6edf1Sgw * Check the vdev configuration to ensure that it's capable of supporting 259715e6edf1Sgw * a root pool. Currently, we do not support RAID-Z or partial configuration. 259815e6edf1Sgw * In addition, only a single top-level vdev is allowed and none of the leaves 259915e6edf1Sgw * can be wholedisks. 260015e6edf1Sgw */ 260115e6edf1Sgw boolean_t 260215e6edf1Sgw vdev_is_bootable(vdev_t *vd) 260315e6edf1Sgw { 260415e6edf1Sgw int c; 260515e6edf1Sgw 260615e6edf1Sgw if (!vd->vdev_ops->vdev_op_leaf) { 260715e6edf1Sgw char *vdev_type = vd->vdev_ops->vdev_op_type; 260815e6edf1Sgw 260915e6edf1Sgw if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 && 261015e6edf1Sgw vd->vdev_children > 1) { 261115e6edf1Sgw return (B_FALSE); 261215e6edf1Sgw } else if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 || 261315e6edf1Sgw strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) { 261415e6edf1Sgw return (B_FALSE); 261515e6edf1Sgw } 261615e6edf1Sgw } else if (vd->vdev_wholedisk == 1) { 261715e6edf1Sgw return (B_FALSE); 261815e6edf1Sgw } 261915e6edf1Sgw 262015e6edf1Sgw for (c = 0; c < vd->vdev_children; c++) { 262115e6edf1Sgw if (!vdev_is_bootable(vd->vdev_child[c])) 262215e6edf1Sgw return (B_FALSE); 262315e6edf1Sgw } 262415e6edf1Sgw return (B_TRUE); 262515e6edf1Sgw } 2626