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 /* 2332b87932Sek * Copyright 2008 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); 319*8ad4d6ddSJeff Bonwick for (int t = 0; t < DTL_TYPES; t++) { 320*8ad4d6ddSJeff Bonwick space_map_create(&vd->vdev_dtl[t], 0, -1ULL, 0, 321*8ad4d6ddSJeff Bonwick &vd->vdev_dtl_lock); 322*8ad4d6ddSJeff 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); 43899653d4eSeschrock 439afefbcddSeschrock /* 440afefbcddSeschrock * Set the whole_disk property. If it's not specified, leave the value 441afefbcddSeschrock * as -1. 442afefbcddSeschrock */ 443afefbcddSeschrock if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, 444afefbcddSeschrock &vd->vdev_wholedisk) != 0) 445afefbcddSeschrock vd->vdev_wholedisk = -1ULL; 446afefbcddSeschrock 447ea8dc4b6Seschrock /* 448ea8dc4b6Seschrock * Look for the 'not present' flag. This will only be set if the device 449ea8dc4b6Seschrock * was not present at the time of import. 450ea8dc4b6Seschrock */ 451c5904d13Seschrock if (!spa->spa_import_faulted) 452c5904d13Seschrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, 453c5904d13Seschrock &vd->vdev_not_present); 454ea8dc4b6Seschrock 455ecc2d604Sbonwick /* 456ecc2d604Sbonwick * Get the alignment requirement. 457ecc2d604Sbonwick */ 458ecc2d604Sbonwick (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); 459ecc2d604Sbonwick 460fa9e4066Sahrens /* 461fa9e4066Sahrens * If we're a top-level vdev, try to load the allocation parameters. 462fa9e4066Sahrens */ 463fa9e4066Sahrens if (parent && !parent->vdev_parent && alloctype == VDEV_ALLOC_LOAD) { 464fa9e4066Sahrens (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, 465fa9e4066Sahrens &vd->vdev_ms_array); 466fa9e4066Sahrens (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, 467fa9e4066Sahrens &vd->vdev_ms_shift); 468fa9e4066Sahrens (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, 469fa9e4066Sahrens &vd->vdev_asize); 470fa9e4066Sahrens } 471fa9e4066Sahrens 472fa9e4066Sahrens /* 4733d7072f8Seschrock * If we're a leaf vdev, try to load the DTL object and other state. 474fa9e4066Sahrens */ 475c5904d13Seschrock if (vd->vdev_ops->vdev_op_leaf && 476c5904d13Seschrock (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE)) { 477c5904d13Seschrock if (alloctype == VDEV_ALLOC_LOAD) { 478c5904d13Seschrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, 479*8ad4d6ddSJeff Bonwick &vd->vdev_dtl_smo.smo_object); 480c5904d13Seschrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, 481c5904d13Seschrock &vd->vdev_unspare); 482c5904d13Seschrock } 483ecc2d604Sbonwick (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, 484ecc2d604Sbonwick &vd->vdev_offline); 485c5904d13Seschrock 4863d7072f8Seschrock /* 4873d7072f8Seschrock * When importing a pool, we want to ignore the persistent fault 4883d7072f8Seschrock * state, as the diagnosis made on another system may not be 4893d7072f8Seschrock * valid in the current context. 4903d7072f8Seschrock */ 4913d7072f8Seschrock if (spa->spa_load_state == SPA_LOAD_OPEN) { 4923d7072f8Seschrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, 4933d7072f8Seschrock &vd->vdev_faulted); 4943d7072f8Seschrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, 4953d7072f8Seschrock &vd->vdev_degraded); 4963d7072f8Seschrock (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, 4973d7072f8Seschrock &vd->vdev_removed); 4983d7072f8Seschrock } 499fa9e4066Sahrens } 500fa9e4066Sahrens 501fa9e4066Sahrens /* 502fa9e4066Sahrens * Add ourselves to the parent's list of children. 503fa9e4066Sahrens */ 504fa9e4066Sahrens vdev_add_child(parent, vd); 505fa9e4066Sahrens 50699653d4eSeschrock *vdp = vd; 50799653d4eSeschrock 50899653d4eSeschrock return (0); 509fa9e4066Sahrens } 510fa9e4066Sahrens 511fa9e4066Sahrens void 512fa9e4066Sahrens vdev_free(vdev_t *vd) 513fa9e4066Sahrens { 514fa9e4066Sahrens int c; 5153d7072f8Seschrock spa_t *spa = vd->vdev_spa; 516fa9e4066Sahrens 517fa9e4066Sahrens /* 518fa9e4066Sahrens * vdev_free() implies closing the vdev first. This is simpler than 519fa9e4066Sahrens * trying to ensure complicated semantics for all callers. 520fa9e4066Sahrens */ 521fa9e4066Sahrens vdev_close(vd); 522fa9e4066Sahrens 523e14bb325SJeff Bonwick ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); 524fa9e4066Sahrens 525fa9e4066Sahrens /* 526fa9e4066Sahrens * Free all children. 527fa9e4066Sahrens */ 528fa9e4066Sahrens for (c = 0; c < vd->vdev_children; c++) 529fa9e4066Sahrens vdev_free(vd->vdev_child[c]); 530fa9e4066Sahrens 531fa9e4066Sahrens ASSERT(vd->vdev_child == NULL); 532fa9e4066Sahrens ASSERT(vd->vdev_guid_sum == vd->vdev_guid); 533fa9e4066Sahrens 534fa9e4066Sahrens /* 535fa9e4066Sahrens * Discard allocation state. 536fa9e4066Sahrens */ 537fa9e4066Sahrens if (vd == vd->vdev_top) 538fa9e4066Sahrens vdev_metaslab_fini(vd); 539fa9e4066Sahrens 540fa9e4066Sahrens ASSERT3U(vd->vdev_stat.vs_space, ==, 0); 54199653d4eSeschrock ASSERT3U(vd->vdev_stat.vs_dspace, ==, 0); 542fa9e4066Sahrens ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0); 543fa9e4066Sahrens 544fa9e4066Sahrens /* 545fa9e4066Sahrens * Remove this vdev from its parent's child list. 546fa9e4066Sahrens */ 547fa9e4066Sahrens vdev_remove_child(vd->vdev_parent, vd); 548fa9e4066Sahrens 549fa9e4066Sahrens ASSERT(vd->vdev_parent == NULL); 550fa9e4066Sahrens 5513d7072f8Seschrock /* 5523d7072f8Seschrock * Clean up vdev structure. 5533d7072f8Seschrock */ 5543d7072f8Seschrock vdev_queue_fini(vd); 5553d7072f8Seschrock vdev_cache_fini(vd); 5563d7072f8Seschrock 5573d7072f8Seschrock if (vd->vdev_path) 5583d7072f8Seschrock spa_strfree(vd->vdev_path); 5593d7072f8Seschrock if (vd->vdev_devid) 5603d7072f8Seschrock spa_strfree(vd->vdev_devid); 5613d7072f8Seschrock if (vd->vdev_physpath) 5623d7072f8Seschrock spa_strfree(vd->vdev_physpath); 5633d7072f8Seschrock 5643d7072f8Seschrock if (vd->vdev_isspare) 5653d7072f8Seschrock spa_spare_remove(vd); 566fa94a07fSbrendan if (vd->vdev_isl2cache) 567fa94a07fSbrendan spa_l2cache_remove(vd); 5683d7072f8Seschrock 5693d7072f8Seschrock txg_list_destroy(&vd->vdev_ms_list); 5703d7072f8Seschrock txg_list_destroy(&vd->vdev_dtl_list); 571*8ad4d6ddSJeff Bonwick 5723d7072f8Seschrock mutex_enter(&vd->vdev_dtl_lock); 573*8ad4d6ddSJeff Bonwick for (int t = 0; t < DTL_TYPES; t++) { 574*8ad4d6ddSJeff Bonwick space_map_unload(&vd->vdev_dtl[t]); 575*8ad4d6ddSJeff Bonwick space_map_destroy(&vd->vdev_dtl[t]); 576*8ad4d6ddSJeff Bonwick } 5773d7072f8Seschrock mutex_exit(&vd->vdev_dtl_lock); 578*8ad4d6ddSJeff Bonwick 5793d7072f8Seschrock mutex_destroy(&vd->vdev_dtl_lock); 5803d7072f8Seschrock mutex_destroy(&vd->vdev_stat_lock); 581e14bb325SJeff Bonwick mutex_destroy(&vd->vdev_probe_lock); 5823d7072f8Seschrock 5833d7072f8Seschrock if (vd == spa->spa_root_vdev) 5843d7072f8Seschrock spa->spa_root_vdev = NULL; 5853d7072f8Seschrock 5863d7072f8Seschrock kmem_free(vd, sizeof (vdev_t)); 587fa9e4066Sahrens } 588fa9e4066Sahrens 589fa9e4066Sahrens /* 590fa9e4066Sahrens * Transfer top-level vdev state from svd to tvd. 591fa9e4066Sahrens */ 592fa9e4066Sahrens static void 593fa9e4066Sahrens vdev_top_transfer(vdev_t *svd, vdev_t *tvd) 594fa9e4066Sahrens { 595fa9e4066Sahrens spa_t *spa = svd->vdev_spa; 596fa9e4066Sahrens metaslab_t *msp; 597fa9e4066Sahrens vdev_t *vd; 598fa9e4066Sahrens int t; 599fa9e4066Sahrens 600fa9e4066Sahrens ASSERT(tvd == tvd->vdev_top); 601fa9e4066Sahrens 602fa9e4066Sahrens tvd->vdev_ms_array = svd->vdev_ms_array; 603fa9e4066Sahrens tvd->vdev_ms_shift = svd->vdev_ms_shift; 604fa9e4066Sahrens tvd->vdev_ms_count = svd->vdev_ms_count; 605fa9e4066Sahrens 606fa9e4066Sahrens svd->vdev_ms_array = 0; 607fa9e4066Sahrens svd->vdev_ms_shift = 0; 608fa9e4066Sahrens svd->vdev_ms_count = 0; 609fa9e4066Sahrens 610fa9e4066Sahrens tvd->vdev_mg = svd->vdev_mg; 611fa9e4066Sahrens tvd->vdev_ms = svd->vdev_ms; 612fa9e4066Sahrens 613fa9e4066Sahrens svd->vdev_mg = NULL; 614fa9e4066Sahrens svd->vdev_ms = NULL; 615ecc2d604Sbonwick 616ecc2d604Sbonwick if (tvd->vdev_mg != NULL) 617ecc2d604Sbonwick tvd->vdev_mg->mg_vd = tvd; 618fa9e4066Sahrens 619fa9e4066Sahrens tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; 620fa9e4066Sahrens tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; 62199653d4eSeschrock tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; 622fa9e4066Sahrens 623fa9e4066Sahrens svd->vdev_stat.vs_alloc = 0; 624fa9e4066Sahrens svd->vdev_stat.vs_space = 0; 62599653d4eSeschrock svd->vdev_stat.vs_dspace = 0; 626fa9e4066Sahrens 627fa9e4066Sahrens for (t = 0; t < TXG_SIZE; t++) { 628fa9e4066Sahrens while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) 629fa9e4066Sahrens (void) txg_list_add(&tvd->vdev_ms_list, msp, t); 630fa9e4066Sahrens while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) 631fa9e4066Sahrens (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); 632fa9e4066Sahrens if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) 633fa9e4066Sahrens (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); 634fa9e4066Sahrens } 635fa9e4066Sahrens 636e14bb325SJeff Bonwick if (list_link_active(&svd->vdev_config_dirty_node)) { 637fa9e4066Sahrens vdev_config_clean(svd); 638fa9e4066Sahrens vdev_config_dirty(tvd); 639fa9e4066Sahrens } 640fa9e4066Sahrens 641e14bb325SJeff Bonwick if (list_link_active(&svd->vdev_state_dirty_node)) { 642e14bb325SJeff Bonwick vdev_state_clean(svd); 643e14bb325SJeff Bonwick vdev_state_dirty(tvd); 644e14bb325SJeff Bonwick } 645e14bb325SJeff Bonwick 64699653d4eSeschrock tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; 64799653d4eSeschrock svd->vdev_deflate_ratio = 0; 6488654d025Sperrin 6498654d025Sperrin tvd->vdev_islog = svd->vdev_islog; 6508654d025Sperrin svd->vdev_islog = 0; 651fa9e4066Sahrens } 652fa9e4066Sahrens 653fa9e4066Sahrens static void 654fa9e4066Sahrens vdev_top_update(vdev_t *tvd, vdev_t *vd) 655fa9e4066Sahrens { 656fa9e4066Sahrens int c; 657fa9e4066Sahrens 658fa9e4066Sahrens if (vd == NULL) 659fa9e4066Sahrens return; 660fa9e4066Sahrens 661fa9e4066Sahrens vd->vdev_top = tvd; 662fa9e4066Sahrens 663fa9e4066Sahrens for (c = 0; c < vd->vdev_children; c++) 664fa9e4066Sahrens vdev_top_update(tvd, vd->vdev_child[c]); 665fa9e4066Sahrens } 666fa9e4066Sahrens 667fa9e4066Sahrens /* 668fa9e4066Sahrens * Add a mirror/replacing vdev above an existing vdev. 669fa9e4066Sahrens */ 670fa9e4066Sahrens vdev_t * 671fa9e4066Sahrens vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) 672fa9e4066Sahrens { 673fa9e4066Sahrens spa_t *spa = cvd->vdev_spa; 674fa9e4066Sahrens vdev_t *pvd = cvd->vdev_parent; 675fa9e4066Sahrens vdev_t *mvd; 676fa9e4066Sahrens 677e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 678fa9e4066Sahrens 679fa9e4066Sahrens mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); 680ecc2d604Sbonwick 681ecc2d604Sbonwick mvd->vdev_asize = cvd->vdev_asize; 682ecc2d604Sbonwick mvd->vdev_ashift = cvd->vdev_ashift; 683ecc2d604Sbonwick mvd->vdev_state = cvd->vdev_state; 684ecc2d604Sbonwick 685fa9e4066Sahrens vdev_remove_child(pvd, cvd); 686fa9e4066Sahrens vdev_add_child(pvd, mvd); 687fa9e4066Sahrens cvd->vdev_id = mvd->vdev_children; 688fa9e4066Sahrens vdev_add_child(mvd, cvd); 689fa9e4066Sahrens vdev_top_update(cvd->vdev_top, cvd->vdev_top); 690fa9e4066Sahrens 691fa9e4066Sahrens if (mvd == mvd->vdev_top) 692fa9e4066Sahrens vdev_top_transfer(cvd, mvd); 693fa9e4066Sahrens 694fa9e4066Sahrens return (mvd); 695fa9e4066Sahrens } 696fa9e4066Sahrens 697fa9e4066Sahrens /* 698fa9e4066Sahrens * Remove a 1-way mirror/replacing vdev from the tree. 699fa9e4066Sahrens */ 700fa9e4066Sahrens void 701fa9e4066Sahrens vdev_remove_parent(vdev_t *cvd) 702fa9e4066Sahrens { 703fa9e4066Sahrens vdev_t *mvd = cvd->vdev_parent; 704fa9e4066Sahrens vdev_t *pvd = mvd->vdev_parent; 705fa9e4066Sahrens 706e14bb325SJeff Bonwick ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); 707fa9e4066Sahrens 708fa9e4066Sahrens ASSERT(mvd->vdev_children == 1); 709fa9e4066Sahrens ASSERT(mvd->vdev_ops == &vdev_mirror_ops || 71099653d4eSeschrock mvd->vdev_ops == &vdev_replacing_ops || 71199653d4eSeschrock mvd->vdev_ops == &vdev_spare_ops); 712ecc2d604Sbonwick cvd->vdev_ashift = mvd->vdev_ashift; 713fa9e4066Sahrens 714fa9e4066Sahrens vdev_remove_child(mvd, cvd); 715fa9e4066Sahrens vdev_remove_child(pvd, mvd); 716*8ad4d6ddSJeff Bonwick 71799653d4eSeschrock /* 718e14bb325SJeff Bonwick * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. 719e14bb325SJeff Bonwick * Otherwise, we could have detached an offline device, and when we 720e14bb325SJeff Bonwick * go to import the pool we'll think we have two top-level vdevs, 721e14bb325SJeff Bonwick * instead of a different version of the same top-level vdev. 72299653d4eSeschrock */ 723*8ad4d6ddSJeff Bonwick if (mvd->vdev_top == mvd) { 724*8ad4d6ddSJeff Bonwick uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid; 725*8ad4d6ddSJeff Bonwick cvd->vdev_guid += guid_delta; 726*8ad4d6ddSJeff Bonwick cvd->vdev_guid_sum += guid_delta; 727*8ad4d6ddSJeff Bonwick } 728e14bb325SJeff Bonwick cvd->vdev_id = mvd->vdev_id; 729e14bb325SJeff Bonwick vdev_add_child(pvd, cvd); 730fa9e4066Sahrens vdev_top_update(cvd->vdev_top, cvd->vdev_top); 731fa9e4066Sahrens 732fa9e4066Sahrens if (cvd == cvd->vdev_top) 733fa9e4066Sahrens vdev_top_transfer(mvd, cvd); 734fa9e4066Sahrens 735fa9e4066Sahrens ASSERT(mvd->vdev_children == 0); 736fa9e4066Sahrens vdev_free(mvd); 737fa9e4066Sahrens } 738fa9e4066Sahrens 739ea8dc4b6Seschrock int 740fa9e4066Sahrens vdev_metaslab_init(vdev_t *vd, uint64_t txg) 741fa9e4066Sahrens { 742fa9e4066Sahrens spa_t *spa = vd->vdev_spa; 743ecc2d604Sbonwick objset_t *mos = spa->spa_meta_objset; 7448654d025Sperrin metaslab_class_t *mc; 745ecc2d604Sbonwick uint64_t m; 746fa9e4066Sahrens uint64_t oldc = vd->vdev_ms_count; 747fa9e4066Sahrens uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; 748ecc2d604Sbonwick metaslab_t **mspp; 749ecc2d604Sbonwick int error; 750fa9e4066Sahrens 7510e34b6a7Sbonwick if (vd->vdev_ms_shift == 0) /* not being allocated from yet */ 7520e34b6a7Sbonwick return (0); 7530e34b6a7Sbonwick 754fa9e4066Sahrens ASSERT(oldc <= newc); 755fa9e4066Sahrens 7568654d025Sperrin if (vd->vdev_islog) 7578654d025Sperrin mc = spa->spa_log_class; 7588654d025Sperrin else 7598654d025Sperrin mc = spa->spa_normal_class; 7608654d025Sperrin 761ecc2d604Sbonwick if (vd->vdev_mg == NULL) 762ecc2d604Sbonwick vd->vdev_mg = metaslab_group_create(mc, vd); 763fa9e4066Sahrens 764ecc2d604Sbonwick mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); 765fa9e4066Sahrens 766ecc2d604Sbonwick if (oldc != 0) { 767ecc2d604Sbonwick bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); 768ecc2d604Sbonwick kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); 769ecc2d604Sbonwick } 770fa9e4066Sahrens 771ecc2d604Sbonwick vd->vdev_ms = mspp; 772ecc2d604Sbonwick vd->vdev_ms_count = newc; 773fa9e4066Sahrens 774ecc2d604Sbonwick for (m = oldc; m < newc; m++) { 775ecc2d604Sbonwick space_map_obj_t smo = { 0, 0, 0 }; 776ecc2d604Sbonwick if (txg == 0) { 777ecc2d604Sbonwick uint64_t object = 0; 778ecc2d604Sbonwick error = dmu_read(mos, vd->vdev_ms_array, 779ecc2d604Sbonwick m * sizeof (uint64_t), sizeof (uint64_t), &object); 780ecc2d604Sbonwick if (error) 781ecc2d604Sbonwick return (error); 782ecc2d604Sbonwick if (object != 0) { 783ecc2d604Sbonwick dmu_buf_t *db; 784ecc2d604Sbonwick error = dmu_bonus_hold(mos, object, FTAG, &db); 785ecc2d604Sbonwick if (error) 786ecc2d604Sbonwick return (error); 7871934e92fSmaybee ASSERT3U(db->db_size, >=, sizeof (smo)); 7881934e92fSmaybee bcopy(db->db_data, &smo, sizeof (smo)); 789ecc2d604Sbonwick ASSERT3U(smo.smo_object, ==, object); 790ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 791fa9e4066Sahrens } 792fa9e4066Sahrens } 793ecc2d604Sbonwick vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, 794ecc2d604Sbonwick m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); 795fa9e4066Sahrens } 796fa9e4066Sahrens 797ea8dc4b6Seschrock return (0); 798fa9e4066Sahrens } 799fa9e4066Sahrens 800fa9e4066Sahrens void 801fa9e4066Sahrens vdev_metaslab_fini(vdev_t *vd) 802fa9e4066Sahrens { 803fa9e4066Sahrens uint64_t m; 804fa9e4066Sahrens uint64_t count = vd->vdev_ms_count; 805fa9e4066Sahrens 806fa9e4066Sahrens if (vd->vdev_ms != NULL) { 807fa9e4066Sahrens for (m = 0; m < count; m++) 808ecc2d604Sbonwick if (vd->vdev_ms[m] != NULL) 809ecc2d604Sbonwick metaslab_fini(vd->vdev_ms[m]); 810fa9e4066Sahrens kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); 811fa9e4066Sahrens vd->vdev_ms = NULL; 812fa9e4066Sahrens } 813fa9e4066Sahrens } 814fa9e4066Sahrens 815e14bb325SJeff Bonwick typedef struct vdev_probe_stats { 816e14bb325SJeff Bonwick boolean_t vps_readable; 817e14bb325SJeff Bonwick boolean_t vps_writeable; 818e14bb325SJeff Bonwick int vps_flags; 819e14bb325SJeff Bonwick zio_t *vps_root; 820e14bb325SJeff Bonwick vdev_t *vps_vd; 821e14bb325SJeff Bonwick } vdev_probe_stats_t; 822e14bb325SJeff Bonwick 823e14bb325SJeff Bonwick static void 824e14bb325SJeff Bonwick vdev_probe_done(zio_t *zio) 8250a4e9518Sgw { 826*8ad4d6ddSJeff Bonwick spa_t *spa = zio->io_spa; 827e14bb325SJeff Bonwick vdev_probe_stats_t *vps = zio->io_private; 828e14bb325SJeff Bonwick vdev_t *vd = vps->vps_vd; 829e14bb325SJeff Bonwick 830e14bb325SJeff Bonwick if (zio->io_type == ZIO_TYPE_READ) { 831e14bb325SJeff Bonwick ASSERT(zio->io_vd == vd); 832e14bb325SJeff Bonwick if (zio->io_error == 0) 833e14bb325SJeff Bonwick vps->vps_readable = 1; 834*8ad4d6ddSJeff Bonwick if (zio->io_error == 0 && spa_writeable(spa)) { 835e14bb325SJeff Bonwick zio_nowait(zio_write_phys(vps->vps_root, vd, 836e14bb325SJeff Bonwick zio->io_offset, zio->io_size, zio->io_data, 837e14bb325SJeff Bonwick ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 838e14bb325SJeff Bonwick ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); 839e14bb325SJeff Bonwick } else { 840e14bb325SJeff Bonwick zio_buf_free(zio->io_data, zio->io_size); 841e14bb325SJeff Bonwick } 842e14bb325SJeff Bonwick } else if (zio->io_type == ZIO_TYPE_WRITE) { 843e14bb325SJeff Bonwick ASSERT(zio->io_vd == vd); 844e14bb325SJeff Bonwick if (zio->io_error == 0) 845e14bb325SJeff Bonwick vps->vps_writeable = 1; 846e14bb325SJeff Bonwick zio_buf_free(zio->io_data, zio->io_size); 847e14bb325SJeff Bonwick } else if (zio->io_type == ZIO_TYPE_NULL) { 848e14bb325SJeff Bonwick ASSERT(zio->io_vd == NULL); 849e14bb325SJeff Bonwick ASSERT(zio == vps->vps_root); 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) && 855*8ad4d6ddSJeff 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, 860*8ad4d6ddSJeff Bonwick spa, vd, NULL, 0, 0); 861e14bb325SJeff Bonwick zio->io_error = ENXIO; 862e14bb325SJeff Bonwick } 863e14bb325SJeff Bonwick kmem_free(vps, sizeof (*vps)); 864e14bb325SJeff Bonwick } 865e14bb325SJeff Bonwick } 8660a4e9518Sgw 867e14bb325SJeff Bonwick /* 868e14bb325SJeff Bonwick * Determine whether this device is accessible by reading and writing 869e14bb325SJeff Bonwick * to several known locations: the pad regions of each vdev label 870e14bb325SJeff Bonwick * but the first (which we leave alone in case it contains a VTOC). 871e14bb325SJeff Bonwick */ 872e14bb325SJeff Bonwick zio_t * 873e14bb325SJeff Bonwick vdev_probe(vdev_t *vd, zio_t *pio) 874e14bb325SJeff Bonwick { 875e14bb325SJeff Bonwick spa_t *spa = vd->vdev_spa; 876e14bb325SJeff Bonwick vdev_probe_stats_t *vps; 877e14bb325SJeff Bonwick zio_t *zio; 8780a4e9518Sgw 879e14bb325SJeff Bonwick vps = kmem_zalloc(sizeof (*vps), KM_SLEEP); 880e14bb325SJeff Bonwick 881e14bb325SJeff Bonwick vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | 882e14bb325SJeff Bonwick ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | ZIO_FLAG_DONT_RETRY; 883e14bb325SJeff Bonwick 884e14bb325SJeff Bonwick if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { 885e14bb325SJeff Bonwick /* 886e14bb325SJeff Bonwick * vdev_cant_read and vdev_cant_write can only transition 887e14bb325SJeff Bonwick * from TRUE to FALSE when we have the SCL_ZIO lock as writer; 888e14bb325SJeff Bonwick * otherwise they can only transition from FALSE to TRUE. 889e14bb325SJeff Bonwick * This ensures that any zio looking at these values can 890e14bb325SJeff Bonwick * assume that failures persist for the life of the I/O. 891e14bb325SJeff Bonwick * That's important because when a device has intermittent 892e14bb325SJeff Bonwick * connectivity problems, we want to ensure that they're 893e14bb325SJeff Bonwick * ascribed to the device (ENXIO) and not the zio (EIO). 894e14bb325SJeff Bonwick * 895e14bb325SJeff Bonwick * Since we hold SCL_ZIO as writer here, clear both values 896e14bb325SJeff Bonwick * so the probe can reevaluate from first principles. 897e14bb325SJeff Bonwick */ 898e14bb325SJeff Bonwick vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; 899e14bb325SJeff Bonwick vd->vdev_cant_read = B_FALSE; 900e14bb325SJeff Bonwick vd->vdev_cant_write = B_FALSE; 901e14bb325SJeff Bonwick } 902e14bb325SJeff Bonwick 903e14bb325SJeff Bonwick ASSERT(vd->vdev_ops->vdev_op_leaf); 904e14bb325SJeff Bonwick 905e14bb325SJeff Bonwick zio = zio_null(pio, spa, vdev_probe_done, vps, vps->vps_flags); 906e14bb325SJeff Bonwick 907e14bb325SJeff Bonwick vps->vps_root = zio; 908e14bb325SJeff Bonwick vps->vps_vd = vd; 909e14bb325SJeff Bonwick 910e14bb325SJeff Bonwick for (int l = 1; l < VDEV_LABELS; l++) { 911e14bb325SJeff Bonwick zio_nowait(zio_read_phys(zio, vd, 912e14bb325SJeff Bonwick vdev_label_offset(vd->vdev_psize, l, 913e14bb325SJeff Bonwick offsetof(vdev_label_t, vl_pad)), 914e14bb325SJeff Bonwick VDEV_SKIP_SIZE, zio_buf_alloc(VDEV_SKIP_SIZE), 915e14bb325SJeff Bonwick ZIO_CHECKSUM_OFF, vdev_probe_done, vps, 916e14bb325SJeff Bonwick ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); 917e14bb325SJeff Bonwick } 918e14bb325SJeff Bonwick 919e14bb325SJeff Bonwick return (zio); 9200a4e9518Sgw } 9210a4e9518Sgw 922fa9e4066Sahrens /* 923fa9e4066Sahrens * Prepare a virtual device for access. 924fa9e4066Sahrens */ 925fa9e4066Sahrens int 926fa9e4066Sahrens vdev_open(vdev_t *vd) 927fa9e4066Sahrens { 928*8ad4d6ddSJeff Bonwick spa_t *spa = vd->vdev_spa; 929fa9e4066Sahrens int error; 930fa9e4066Sahrens int c; 931fa9e4066Sahrens uint64_t osize = 0; 932fa9e4066Sahrens uint64_t asize, psize; 933ecc2d604Sbonwick uint64_t ashift = 0; 934fa9e4066Sahrens 935*8ad4d6ddSJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 936*8ad4d6ddSJeff Bonwick 937fa9e4066Sahrens ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || 938fa9e4066Sahrens vd->vdev_state == VDEV_STATE_CANT_OPEN || 939fa9e4066Sahrens vd->vdev_state == VDEV_STATE_OFFLINE); 940fa9e4066Sahrens 941fa9e4066Sahrens vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 942fa9e4066Sahrens 9433d7072f8Seschrock if (!vd->vdev_removed && vd->vdev_faulted) { 9443d7072f8Seschrock ASSERT(vd->vdev_children == 0); 9453d7072f8Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, 9463d7072f8Seschrock VDEV_AUX_ERR_EXCEEDED); 9473d7072f8Seschrock return (ENXIO); 9483d7072f8Seschrock } else if (vd->vdev_offline) { 949fa9e4066Sahrens ASSERT(vd->vdev_children == 0); 950ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); 951fa9e4066Sahrens return (ENXIO); 952fa9e4066Sahrens } 953fa9e4066Sahrens 954fa9e4066Sahrens error = vd->vdev_ops->vdev_op_open(vd, &osize, &ashift); 955fa9e4066Sahrens 956ea8dc4b6Seschrock if (zio_injection_enabled && error == 0) 957ea8dc4b6Seschrock error = zio_handle_device_injection(vd, ENXIO); 958ea8dc4b6Seschrock 959fa9e4066Sahrens if (error) { 9603d7072f8Seschrock if (vd->vdev_removed && 9613d7072f8Seschrock vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) 9623d7072f8Seschrock vd->vdev_removed = B_FALSE; 9633d7072f8Seschrock 964ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 965fa9e4066Sahrens vd->vdev_stat.vs_aux); 966fa9e4066Sahrens return (error); 967fa9e4066Sahrens } 968fa9e4066Sahrens 9693d7072f8Seschrock vd->vdev_removed = B_FALSE; 9703d7072f8Seschrock 9713d7072f8Seschrock if (vd->vdev_degraded) { 9723d7072f8Seschrock ASSERT(vd->vdev_children == 0); 9733d7072f8Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 9743d7072f8Seschrock VDEV_AUX_ERR_EXCEEDED); 9753d7072f8Seschrock } else { 9763d7072f8Seschrock vd->vdev_state = VDEV_STATE_HEALTHY; 9773d7072f8Seschrock } 978fa9e4066Sahrens 979fa9e4066Sahrens for (c = 0; c < vd->vdev_children; c++) 980ea8dc4b6Seschrock if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { 981ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, 982ea8dc4b6Seschrock VDEV_AUX_NONE); 983ea8dc4b6Seschrock break; 984ea8dc4b6Seschrock } 985fa9e4066Sahrens 986fa9e4066Sahrens osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); 987fa9e4066Sahrens 988fa9e4066Sahrens if (vd->vdev_children == 0) { 989fa9e4066Sahrens if (osize < SPA_MINDEVSIZE) { 990ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 991ea8dc4b6Seschrock VDEV_AUX_TOO_SMALL); 992fa9e4066Sahrens return (EOVERFLOW); 993fa9e4066Sahrens } 994fa9e4066Sahrens psize = osize; 995fa9e4066Sahrens asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); 996fa9e4066Sahrens } else { 997ecc2d604Sbonwick if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - 998fa9e4066Sahrens (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { 999ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1000ea8dc4b6Seschrock VDEV_AUX_TOO_SMALL); 1001fa9e4066Sahrens return (EOVERFLOW); 1002fa9e4066Sahrens } 1003fa9e4066Sahrens psize = 0; 1004fa9e4066Sahrens asize = osize; 1005fa9e4066Sahrens } 1006fa9e4066Sahrens 1007fa9e4066Sahrens vd->vdev_psize = psize; 1008fa9e4066Sahrens 1009fa9e4066Sahrens if (vd->vdev_asize == 0) { 1010fa9e4066Sahrens /* 1011fa9e4066Sahrens * This is the first-ever open, so use the computed values. 1012ecc2d604Sbonwick * For testing purposes, a higher ashift can be requested. 1013fa9e4066Sahrens */ 1014fa9e4066Sahrens vd->vdev_asize = asize; 1015ecc2d604Sbonwick vd->vdev_ashift = MAX(ashift, vd->vdev_ashift); 1016fa9e4066Sahrens } else { 1017fa9e4066Sahrens /* 1018fa9e4066Sahrens * Make sure the alignment requirement hasn't increased. 1019fa9e4066Sahrens */ 1020ecc2d604Sbonwick if (ashift > vd->vdev_top->vdev_ashift) { 1021ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1022ea8dc4b6Seschrock VDEV_AUX_BAD_LABEL); 1023fa9e4066Sahrens return (EINVAL); 1024fa9e4066Sahrens } 1025fa9e4066Sahrens 1026fa9e4066Sahrens /* 1027fa9e4066Sahrens * Make sure the device hasn't shrunk. 1028fa9e4066Sahrens */ 1029fa9e4066Sahrens if (asize < vd->vdev_asize) { 1030ea8dc4b6Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1031ea8dc4b6Seschrock VDEV_AUX_BAD_LABEL); 1032fa9e4066Sahrens return (EINVAL); 1033fa9e4066Sahrens } 1034fa9e4066Sahrens 1035fa9e4066Sahrens /* 1036fa9e4066Sahrens * If all children are healthy and the asize has increased, 1037fa9e4066Sahrens * then we've experienced dynamic LUN growth. 1038fa9e4066Sahrens */ 1039fa9e4066Sahrens if (vd->vdev_state == VDEV_STATE_HEALTHY && 1040fa9e4066Sahrens asize > vd->vdev_asize) { 1041fa9e4066Sahrens vd->vdev_asize = asize; 1042fa9e4066Sahrens } 1043fa9e4066Sahrens } 1044fa9e4066Sahrens 10450a4e9518Sgw /* 10460a4e9518Sgw * Ensure we can issue some IO before declaring the 10470a4e9518Sgw * vdev open for business. 10480a4e9518Sgw */ 1049e14bb325SJeff Bonwick if (vd->vdev_ops->vdev_op_leaf && 1050e14bb325SJeff Bonwick (error = zio_wait(vdev_probe(vd, NULL))) != 0) { 10510a4e9518Sgw vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1052e14bb325SJeff Bonwick VDEV_AUX_IO_FAILURE); 10530a4e9518Sgw return (error); 10540a4e9518Sgw } 10550a4e9518Sgw 105699653d4eSeschrock /* 105799653d4eSeschrock * If this is a top-level vdev, compute the raidz-deflation 105899653d4eSeschrock * ratio. Note, we hard-code in 128k (1<<17) because it is the 105999653d4eSeschrock * current "typical" blocksize. Even if SPA_MAXBLOCKSIZE 106099653d4eSeschrock * changes, this algorithm must never change, or we will 106199653d4eSeschrock * inconsistently account for existing bp's. 106299653d4eSeschrock */ 106399653d4eSeschrock if (vd->vdev_top == vd) { 106499653d4eSeschrock vd->vdev_deflate_ratio = (1<<17) / 106599653d4eSeschrock (vdev_psize_to_asize(vd, 1<<17) >> SPA_MINBLOCKSHIFT); 106699653d4eSeschrock } 106799653d4eSeschrock 1068088f3894Sahrens /* 1069088f3894Sahrens * If a leaf vdev has a DTL, and seems healthy, then kick off a 1070*8ad4d6ddSJeff Bonwick * resilver. But don't do this if we are doing a reopen for a scrub, 1071*8ad4d6ddSJeff Bonwick * since this would just restart the scrub we are already doing. 1072088f3894Sahrens */ 1073*8ad4d6ddSJeff Bonwick if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen && 1074*8ad4d6ddSJeff Bonwick vdev_resilver_needed(vd, NULL, NULL)) 1075*8ad4d6ddSJeff Bonwick spa_async_request(spa, SPA_ASYNC_RESILVER); 1076088f3894Sahrens 1077fa9e4066Sahrens return (0); 1078fa9e4066Sahrens } 1079fa9e4066Sahrens 1080560e6e96Seschrock /* 1081560e6e96Seschrock * Called once the vdevs are all opened, this routine validates the label 1082560e6e96Seschrock * contents. This needs to be done before vdev_load() so that we don't 10833d7072f8Seschrock * inadvertently do repair I/Os to the wrong device. 1084560e6e96Seschrock * 1085560e6e96Seschrock * This function will only return failure if one of the vdevs indicates that it 1086560e6e96Seschrock * has since been destroyed or exported. This is only possible if 1087560e6e96Seschrock * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state 1088560e6e96Seschrock * will be updated but the function will return 0. 1089560e6e96Seschrock */ 1090560e6e96Seschrock int 1091560e6e96Seschrock vdev_validate(vdev_t *vd) 1092560e6e96Seschrock { 1093560e6e96Seschrock spa_t *spa = vd->vdev_spa; 1094560e6e96Seschrock int c; 1095560e6e96Seschrock nvlist_t *label; 1096e14bb325SJeff Bonwick uint64_t guid, top_guid; 1097560e6e96Seschrock uint64_t state; 1098560e6e96Seschrock 1099560e6e96Seschrock for (c = 0; c < vd->vdev_children; c++) 1100560e6e96Seschrock if (vdev_validate(vd->vdev_child[c]) != 0) 11010bf246f5Smc return (EBADF); 1102560e6e96Seschrock 1103b5989ec7Seschrock /* 1104b5989ec7Seschrock * If the device has already failed, or was marked offline, don't do 1105b5989ec7Seschrock * any further validation. Otherwise, label I/O will fail and we will 1106b5989ec7Seschrock * overwrite the previous state. 1107b5989ec7Seschrock */ 1108e14bb325SJeff Bonwick if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { 1109560e6e96Seschrock 1110560e6e96Seschrock if ((label = vdev_label_read_config(vd)) == NULL) { 1111560e6e96Seschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 1112560e6e96Seschrock VDEV_AUX_BAD_LABEL); 1113560e6e96Seschrock return (0); 1114560e6e96Seschrock } 1115560e6e96Seschrock 1116560e6e96Seschrock if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, 1117560e6e96Seschrock &guid) != 0 || guid != spa_guid(spa)) { 1118560e6e96Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1119560e6e96Seschrock VDEV_AUX_CORRUPT_DATA); 1120560e6e96Seschrock nvlist_free(label); 1121560e6e96Seschrock return (0); 1122560e6e96Seschrock } 1123560e6e96Seschrock 1124e14bb325SJeff Bonwick /* 1125e14bb325SJeff Bonwick * If this vdev just became a top-level vdev because its 1126e14bb325SJeff Bonwick * sibling was detached, it will have adopted the parent's 1127e14bb325SJeff Bonwick * vdev guid -- but the label may or may not be on disk yet. 1128e14bb325SJeff Bonwick * Fortunately, either version of the label will have the 1129e14bb325SJeff Bonwick * same top guid, so if we're a top-level vdev, we can 1130e14bb325SJeff Bonwick * safely compare to that instead. 1131e14bb325SJeff Bonwick */ 1132560e6e96Seschrock if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, 1133e14bb325SJeff Bonwick &guid) != 0 || 1134e14bb325SJeff Bonwick nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, 1135e14bb325SJeff Bonwick &top_guid) != 0 || 1136e14bb325SJeff Bonwick (vd->vdev_guid != guid && 1137e14bb325SJeff Bonwick (vd->vdev_guid != top_guid || vd != vd->vdev_top))) { 1138560e6e96Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1139560e6e96Seschrock VDEV_AUX_CORRUPT_DATA); 1140560e6e96Seschrock nvlist_free(label); 1141560e6e96Seschrock return (0); 1142560e6e96Seschrock } 1143560e6e96Seschrock 1144560e6e96Seschrock if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, 1145560e6e96Seschrock &state) != 0) { 1146560e6e96Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1147560e6e96Seschrock VDEV_AUX_CORRUPT_DATA); 1148560e6e96Seschrock nvlist_free(label); 1149560e6e96Seschrock return (0); 1150560e6e96Seschrock } 1151560e6e96Seschrock 1152560e6e96Seschrock nvlist_free(label); 1153560e6e96Seschrock 1154560e6e96Seschrock if (spa->spa_load_state == SPA_LOAD_OPEN && 1155560e6e96Seschrock state != POOL_STATE_ACTIVE) 11560bf246f5Smc return (EBADF); 1157560e6e96Seschrock 115851ece835Seschrock /* 115951ece835Seschrock * If we were able to open and validate a vdev that was 116051ece835Seschrock * previously marked permanently unavailable, clear that state 116151ece835Seschrock * now. 116251ece835Seschrock */ 116351ece835Seschrock if (vd->vdev_not_present) 116451ece835Seschrock vd->vdev_not_present = 0; 116551ece835Seschrock } 1166560e6e96Seschrock 1167560e6e96Seschrock return (0); 1168560e6e96Seschrock } 1169560e6e96Seschrock 1170fa9e4066Sahrens /* 1171fa9e4066Sahrens * Close a virtual device. 1172fa9e4066Sahrens */ 1173fa9e4066Sahrens void 1174fa9e4066Sahrens vdev_close(vdev_t *vd) 1175fa9e4066Sahrens { 1176*8ad4d6ddSJeff Bonwick spa_t *spa = vd->vdev_spa; 1177*8ad4d6ddSJeff Bonwick 1178*8ad4d6ddSJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1179*8ad4d6ddSJeff Bonwick 1180fa9e4066Sahrens vd->vdev_ops->vdev_op_close(vd); 1181fa9e4066Sahrens 11823d7072f8Seschrock vdev_cache_purge(vd); 1183fa9e4066Sahrens 1184560e6e96Seschrock /* 1185560e6e96Seschrock * We record the previous state before we close it, so that if we are 1186560e6e96Seschrock * doing a reopen(), we don't generate FMA ereports if we notice that 1187560e6e96Seschrock * it's still faulted. 1188560e6e96Seschrock */ 1189560e6e96Seschrock vd->vdev_prevstate = vd->vdev_state; 1190560e6e96Seschrock 1191fa9e4066Sahrens if (vd->vdev_offline) 1192fa9e4066Sahrens vd->vdev_state = VDEV_STATE_OFFLINE; 1193fa9e4066Sahrens else 1194fa9e4066Sahrens vd->vdev_state = VDEV_STATE_CLOSED; 1195ea8dc4b6Seschrock vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 1196fa9e4066Sahrens } 1197fa9e4066Sahrens 1198fa9e4066Sahrens void 1199ea8dc4b6Seschrock vdev_reopen(vdev_t *vd) 1200fa9e4066Sahrens { 1201ea8dc4b6Seschrock spa_t *spa = vd->vdev_spa; 1202fa9e4066Sahrens 1203e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1204ea8dc4b6Seschrock 1205fa9e4066Sahrens vdev_close(vd); 1206fa9e4066Sahrens (void) vdev_open(vd); 1207fa9e4066Sahrens 120839c23413Seschrock /* 120939c23413Seschrock * Call vdev_validate() here to make sure we have the same device. 121039c23413Seschrock * Otherwise, a device with an invalid label could be successfully 121139c23413Seschrock * opened in response to vdev_reopen(). 121239c23413Seschrock */ 1213c5904d13Seschrock if (vd->vdev_aux) { 1214c5904d13Seschrock (void) vdev_validate_aux(vd); 1215e14bb325SJeff Bonwick if (vdev_readable(vd) && vdev_writeable(vd) && 1216c5904d13Seschrock !l2arc_vdev_present(vd)) { 1217c5904d13Seschrock uint64_t size = vdev_get_rsize(vd); 1218c5904d13Seschrock l2arc_add_vdev(spa, vd, 1219c5904d13Seschrock VDEV_LABEL_START_SIZE, 1220c5904d13Seschrock size - VDEV_LABEL_START_SIZE); 1221c5904d13Seschrock } 1222c5904d13Seschrock } else { 1223c5904d13Seschrock (void) vdev_validate(vd); 1224c5904d13Seschrock } 122539c23413Seschrock 1226fa9e4066Sahrens /* 12273d7072f8Seschrock * Reassess parent vdev's health. 1228fa9e4066Sahrens */ 12293d7072f8Seschrock vdev_propagate_state(vd); 1230fa9e4066Sahrens } 1231fa9e4066Sahrens 1232fa9e4066Sahrens int 123399653d4eSeschrock vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) 1234fa9e4066Sahrens { 1235fa9e4066Sahrens int error; 1236fa9e4066Sahrens 1237fa9e4066Sahrens /* 1238fa9e4066Sahrens * Normally, partial opens (e.g. of a mirror) are allowed. 1239fa9e4066Sahrens * For a create, however, we want to fail the request if 1240fa9e4066Sahrens * there are any components we can't open. 1241fa9e4066Sahrens */ 1242fa9e4066Sahrens error = vdev_open(vd); 1243fa9e4066Sahrens 1244fa9e4066Sahrens if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { 1245fa9e4066Sahrens vdev_close(vd); 1246fa9e4066Sahrens return (error ? error : ENXIO); 1247fa9e4066Sahrens } 1248fa9e4066Sahrens 1249fa9e4066Sahrens /* 1250fa9e4066Sahrens * Recursively initialize all labels. 1251fa9e4066Sahrens */ 125239c23413Seschrock if ((error = vdev_label_init(vd, txg, isreplacing ? 125339c23413Seschrock VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { 1254fa9e4066Sahrens vdev_close(vd); 1255fa9e4066Sahrens return (error); 1256fa9e4066Sahrens } 1257fa9e4066Sahrens 1258fa9e4066Sahrens return (0); 1259fa9e4066Sahrens } 1260fa9e4066Sahrens 1261fa9e4066Sahrens /* 1262fa9e4066Sahrens * The is the latter half of vdev_create(). It is distinct because it 1263fa9e4066Sahrens * involves initiating transactions in order to do metaslab creation. 1264fa9e4066Sahrens * For creation, we want to try to create all vdevs at once and then undo it 1265fa9e4066Sahrens * if anything fails; this is much harder if we have pending transactions. 1266fa9e4066Sahrens */ 12670e34b6a7Sbonwick void 1268fa9e4066Sahrens vdev_init(vdev_t *vd, uint64_t txg) 1269fa9e4066Sahrens { 1270fa9e4066Sahrens /* 1271fa9e4066Sahrens * Aim for roughly 200 metaslabs per vdev. 1272fa9e4066Sahrens */ 1273fa9e4066Sahrens vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); 1274fa9e4066Sahrens vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); 1275fa9e4066Sahrens 1276fa9e4066Sahrens /* 12770e34b6a7Sbonwick * Initialize the vdev's metaslabs. This can't fail because 12780e34b6a7Sbonwick * there's nothing to read when creating all new metaslabs. 1279fa9e4066Sahrens */ 12800e34b6a7Sbonwick VERIFY(vdev_metaslab_init(vd, txg) == 0); 1281fa9e4066Sahrens } 1282fa9e4066Sahrens 1283fa9e4066Sahrens void 1284ecc2d604Sbonwick vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) 1285fa9e4066Sahrens { 1286ecc2d604Sbonwick ASSERT(vd == vd->vdev_top); 1287ecc2d604Sbonwick ASSERT(ISP2(flags)); 1288fa9e4066Sahrens 1289ecc2d604Sbonwick if (flags & VDD_METASLAB) 1290ecc2d604Sbonwick (void) txg_list_add(&vd->vdev_ms_list, arg, txg); 1291ecc2d604Sbonwick 1292ecc2d604Sbonwick if (flags & VDD_DTL) 1293ecc2d604Sbonwick (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); 1294ecc2d604Sbonwick 1295ecc2d604Sbonwick (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); 1296fa9e4066Sahrens } 1297fa9e4066Sahrens 1298*8ad4d6ddSJeff Bonwick /* 1299*8ad4d6ddSJeff Bonwick * DTLs. 1300*8ad4d6ddSJeff Bonwick * 1301*8ad4d6ddSJeff Bonwick * A vdev's DTL (dirty time log) is the set of transaction groups for which 1302*8ad4d6ddSJeff Bonwick * the vdev has less than perfect replication. There are three kinds of DTL: 1303*8ad4d6ddSJeff Bonwick * 1304*8ad4d6ddSJeff Bonwick * DTL_MISSING: txgs for which the vdev has no valid copies of the data 1305*8ad4d6ddSJeff Bonwick * 1306*8ad4d6ddSJeff Bonwick * DTL_PARTIAL: txgs for which data is available, but not fully replicated 1307*8ad4d6ddSJeff Bonwick * 1308*8ad4d6ddSJeff Bonwick * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon 1309*8ad4d6ddSJeff Bonwick * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of 1310*8ad4d6ddSJeff Bonwick * txgs that was scrubbed. 1311*8ad4d6ddSJeff Bonwick * 1312*8ad4d6ddSJeff Bonwick * DTL_OUTAGE: txgs which cannot currently be read, whether due to 1313*8ad4d6ddSJeff Bonwick * persistent errors or just some device being offline. 1314*8ad4d6ddSJeff Bonwick * Unlike the other three, the DTL_OUTAGE map is not generally 1315*8ad4d6ddSJeff Bonwick * maintained; it's only computed when needed, typically to 1316*8ad4d6ddSJeff Bonwick * determine whether a device can be detached. 1317*8ad4d6ddSJeff Bonwick * 1318*8ad4d6ddSJeff Bonwick * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device 1319*8ad4d6ddSJeff Bonwick * either has the data or it doesn't. 1320*8ad4d6ddSJeff Bonwick * 1321*8ad4d6ddSJeff Bonwick * For interior vdevs such as mirror and RAID-Z the picture is more complex. 1322*8ad4d6ddSJeff Bonwick * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because 1323*8ad4d6ddSJeff Bonwick * if any child is less than fully replicated, then so is its parent. 1324*8ad4d6ddSJeff Bonwick * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs, 1325*8ad4d6ddSJeff Bonwick * comprising only those txgs which appear in 'maxfaults' or more children; 1326*8ad4d6ddSJeff Bonwick * those are the txgs we don't have enough replication to read. For example, 1327*8ad4d6ddSJeff Bonwick * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2); 1328*8ad4d6ddSJeff Bonwick * thus, its DTL_MISSING consists of the set of txgs that appear in more than 1329*8ad4d6ddSJeff Bonwick * two child DTL_MISSING maps. 1330*8ad4d6ddSJeff Bonwick * 1331*8ad4d6ddSJeff Bonwick * It should be clear from the above that to compute the DTLs and outage maps 1332*8ad4d6ddSJeff Bonwick * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps. 1333*8ad4d6ddSJeff Bonwick * Therefore, that is all we keep on disk. When loading the pool, or after 1334*8ad4d6ddSJeff Bonwick * a configuration change, we generate all other DTLs from first principles. 1335*8ad4d6ddSJeff Bonwick */ 1336fa9e4066Sahrens void 1337*8ad4d6ddSJeff Bonwick vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1338fa9e4066Sahrens { 1339*8ad4d6ddSJeff Bonwick space_map_t *sm = &vd->vdev_dtl[t]; 1340*8ad4d6ddSJeff Bonwick 1341*8ad4d6ddSJeff Bonwick ASSERT(t < DTL_TYPES); 1342*8ad4d6ddSJeff Bonwick ASSERT(vd != vd->vdev_spa->spa_root_vdev); 1343*8ad4d6ddSJeff Bonwick 1344fa9e4066Sahrens mutex_enter(sm->sm_lock); 1345fa9e4066Sahrens if (!space_map_contains(sm, txg, size)) 1346fa9e4066Sahrens space_map_add(sm, txg, size); 1347fa9e4066Sahrens mutex_exit(sm->sm_lock); 1348fa9e4066Sahrens } 1349fa9e4066Sahrens 1350*8ad4d6ddSJeff Bonwick boolean_t 1351*8ad4d6ddSJeff Bonwick vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) 1352fa9e4066Sahrens { 1353*8ad4d6ddSJeff Bonwick space_map_t *sm = &vd->vdev_dtl[t]; 1354*8ad4d6ddSJeff Bonwick boolean_t dirty = B_FALSE; 1355fa9e4066Sahrens 1356*8ad4d6ddSJeff Bonwick ASSERT(t < DTL_TYPES); 1357*8ad4d6ddSJeff Bonwick ASSERT(vd != vd->vdev_spa->spa_root_vdev); 1358fa9e4066Sahrens 1359fa9e4066Sahrens mutex_enter(sm->sm_lock); 1360*8ad4d6ddSJeff Bonwick if (sm->sm_space != 0) 1361*8ad4d6ddSJeff Bonwick dirty = space_map_contains(sm, txg, size); 1362fa9e4066Sahrens mutex_exit(sm->sm_lock); 1363fa9e4066Sahrens 1364fa9e4066Sahrens return (dirty); 1365fa9e4066Sahrens } 1366fa9e4066Sahrens 1367*8ad4d6ddSJeff Bonwick boolean_t 1368*8ad4d6ddSJeff Bonwick vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t) 1369*8ad4d6ddSJeff Bonwick { 1370*8ad4d6ddSJeff Bonwick space_map_t *sm = &vd->vdev_dtl[t]; 1371*8ad4d6ddSJeff Bonwick boolean_t empty; 1372*8ad4d6ddSJeff Bonwick 1373*8ad4d6ddSJeff Bonwick mutex_enter(sm->sm_lock); 1374*8ad4d6ddSJeff Bonwick empty = (sm->sm_space == 0); 1375*8ad4d6ddSJeff Bonwick mutex_exit(sm->sm_lock); 1376*8ad4d6ddSJeff Bonwick 1377*8ad4d6ddSJeff Bonwick return (empty); 1378*8ad4d6ddSJeff Bonwick } 1379*8ad4d6ddSJeff Bonwick 1380fa9e4066Sahrens /* 1381fa9e4066Sahrens * Reassess DTLs after a config change or scrub completion. 1382fa9e4066Sahrens */ 1383fa9e4066Sahrens void 1384fa9e4066Sahrens vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) 1385fa9e4066Sahrens { 1386ea8dc4b6Seschrock spa_t *spa = vd->vdev_spa; 1387*8ad4d6ddSJeff Bonwick avl_tree_t reftree; 1388*8ad4d6ddSJeff Bonwick int minref; 1389fa9e4066Sahrens 1390*8ad4d6ddSJeff Bonwick ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 1391fa9e4066Sahrens 1392*8ad4d6ddSJeff Bonwick for (int c = 0; c < vd->vdev_children; c++) 1393*8ad4d6ddSJeff Bonwick vdev_dtl_reassess(vd->vdev_child[c], txg, 1394*8ad4d6ddSJeff Bonwick scrub_txg, scrub_done); 1395*8ad4d6ddSJeff Bonwick 1396*8ad4d6ddSJeff Bonwick if (vd == spa->spa_root_vdev) 1397*8ad4d6ddSJeff Bonwick return; 1398*8ad4d6ddSJeff Bonwick 1399*8ad4d6ddSJeff Bonwick if (vd->vdev_ops->vdev_op_leaf) { 1400fa9e4066Sahrens mutex_enter(&vd->vdev_dtl_lock); 1401088f3894Sahrens if (scrub_txg != 0 && 1402088f3894Sahrens (spa->spa_scrub_started || spa->spa_scrub_errors == 0)) { 1403088f3894Sahrens /* XXX should check scrub_done? */ 1404088f3894Sahrens /* 1405088f3894Sahrens * We completed a scrub up to scrub_txg. If we 1406088f3894Sahrens * did it without rebooting, then the scrub dtl 1407088f3894Sahrens * will be valid, so excise the old region and 1408088f3894Sahrens * fold in the scrub dtl. Otherwise, leave the 1409088f3894Sahrens * dtl as-is if there was an error. 1410*8ad4d6ddSJeff Bonwick * 1411*8ad4d6ddSJeff Bonwick * There's little trick here: to excise the beginning 1412*8ad4d6ddSJeff Bonwick * of the DTL_MISSING map, we put it into a reference 1413*8ad4d6ddSJeff Bonwick * tree and then add a segment with refcnt -1 that 1414*8ad4d6ddSJeff Bonwick * covers the range [0, scrub_txg). This means 1415*8ad4d6ddSJeff Bonwick * that each txg in that range has refcnt -1 or 0. 1416*8ad4d6ddSJeff Bonwick * We then add DTL_SCRUB with a refcnt of 2, so that 1417*8ad4d6ddSJeff Bonwick * entries in the range [0, scrub_txg) will have a 1418*8ad4d6ddSJeff Bonwick * positive refcnt -- either 1 or 2. We then convert 1419*8ad4d6ddSJeff Bonwick * the reference tree into the new DTL_MISSING map. 1420088f3894Sahrens */ 1421*8ad4d6ddSJeff Bonwick space_map_ref_create(&reftree); 1422*8ad4d6ddSJeff Bonwick space_map_ref_add_map(&reftree, 1423*8ad4d6ddSJeff Bonwick &vd->vdev_dtl[DTL_MISSING], 1); 1424*8ad4d6ddSJeff Bonwick space_map_ref_add_seg(&reftree, 0, scrub_txg, -1); 1425*8ad4d6ddSJeff Bonwick space_map_ref_add_map(&reftree, 1426*8ad4d6ddSJeff Bonwick &vd->vdev_dtl[DTL_SCRUB], 2); 1427*8ad4d6ddSJeff Bonwick space_map_ref_generate_map(&reftree, 1428*8ad4d6ddSJeff Bonwick &vd->vdev_dtl[DTL_MISSING], 1); 1429*8ad4d6ddSJeff Bonwick space_map_ref_destroy(&reftree); 1430fa9e4066Sahrens } 1431*8ad4d6ddSJeff Bonwick space_map_vacate(&vd->vdev_dtl[DTL_PARTIAL], NULL, NULL); 1432*8ad4d6ddSJeff Bonwick space_map_walk(&vd->vdev_dtl[DTL_MISSING], 1433*8ad4d6ddSJeff Bonwick space_map_add, &vd->vdev_dtl[DTL_PARTIAL]); 1434fa9e4066Sahrens if (scrub_done) 1435*8ad4d6ddSJeff Bonwick space_map_vacate(&vd->vdev_dtl[DTL_SCRUB], NULL, NULL); 1436*8ad4d6ddSJeff Bonwick space_map_vacate(&vd->vdev_dtl[DTL_OUTAGE], NULL, NULL); 1437*8ad4d6ddSJeff Bonwick if (!vdev_readable(vd)) 1438*8ad4d6ddSJeff Bonwick space_map_add(&vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL); 1439*8ad4d6ddSJeff Bonwick else 1440*8ad4d6ddSJeff Bonwick space_map_walk(&vd->vdev_dtl[DTL_MISSING], 1441*8ad4d6ddSJeff Bonwick space_map_add, &vd->vdev_dtl[DTL_OUTAGE]); 1442fa9e4066Sahrens mutex_exit(&vd->vdev_dtl_lock); 1443088f3894Sahrens 1444ecc2d604Sbonwick if (txg != 0) 1445ecc2d604Sbonwick vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); 1446fa9e4066Sahrens return; 1447fa9e4066Sahrens } 1448fa9e4066Sahrens 1449fa9e4066Sahrens mutex_enter(&vd->vdev_dtl_lock); 1450*8ad4d6ddSJeff Bonwick for (int t = 0; t < DTL_TYPES; t++) { 1451*8ad4d6ddSJeff Bonwick if (t == DTL_SCRUB) 1452*8ad4d6ddSJeff Bonwick continue; /* leaf vdevs only */ 1453*8ad4d6ddSJeff Bonwick if (t == DTL_PARTIAL) 1454*8ad4d6ddSJeff Bonwick minref = 1; /* i.e. non-zero */ 1455*8ad4d6ddSJeff Bonwick else if (vd->vdev_nparity != 0) 1456*8ad4d6ddSJeff Bonwick minref = vd->vdev_nparity + 1; /* RAID-Z */ 1457*8ad4d6ddSJeff Bonwick else 1458*8ad4d6ddSJeff Bonwick minref = vd->vdev_children; /* any kind of mirror */ 1459*8ad4d6ddSJeff Bonwick space_map_ref_create(&reftree); 1460*8ad4d6ddSJeff Bonwick for (int c = 0; c < vd->vdev_children; c++) { 1461*8ad4d6ddSJeff Bonwick vdev_t *cvd = vd->vdev_child[c]; 1462*8ad4d6ddSJeff Bonwick mutex_enter(&cvd->vdev_dtl_lock); 1463*8ad4d6ddSJeff Bonwick space_map_ref_add_map(&reftree, &cvd->vdev_dtl[t], 1); 1464*8ad4d6ddSJeff Bonwick mutex_exit(&cvd->vdev_dtl_lock); 1465*8ad4d6ddSJeff Bonwick } 1466*8ad4d6ddSJeff Bonwick space_map_ref_generate_map(&reftree, &vd->vdev_dtl[t], minref); 1467*8ad4d6ddSJeff Bonwick space_map_ref_destroy(&reftree); 1468fa9e4066Sahrens } 1469*8ad4d6ddSJeff Bonwick mutex_exit(&vd->vdev_dtl_lock); 1470fa9e4066Sahrens } 1471fa9e4066Sahrens 1472fa9e4066Sahrens static int 1473fa9e4066Sahrens vdev_dtl_load(vdev_t *vd) 1474fa9e4066Sahrens { 1475fa9e4066Sahrens spa_t *spa = vd->vdev_spa; 1476*8ad4d6ddSJeff Bonwick space_map_obj_t *smo = &vd->vdev_dtl_smo; 1477ecc2d604Sbonwick objset_t *mos = spa->spa_meta_objset; 1478fa9e4066Sahrens dmu_buf_t *db; 1479fa9e4066Sahrens int error; 1480fa9e4066Sahrens 1481fa9e4066Sahrens ASSERT(vd->vdev_children == 0); 1482fa9e4066Sahrens 1483fa9e4066Sahrens if (smo->smo_object == 0) 1484fa9e4066Sahrens return (0); 1485fa9e4066Sahrens 1486ecc2d604Sbonwick if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) 1487ea8dc4b6Seschrock return (error); 1488ecc2d604Sbonwick 14891934e92fSmaybee ASSERT3U(db->db_size, >=, sizeof (*smo)); 14901934e92fSmaybee bcopy(db->db_data, smo, sizeof (*smo)); 1491ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1492fa9e4066Sahrens 1493fa9e4066Sahrens mutex_enter(&vd->vdev_dtl_lock); 1494*8ad4d6ddSJeff Bonwick error = space_map_load(&vd->vdev_dtl[DTL_MISSING], 1495*8ad4d6ddSJeff Bonwick NULL, SM_ALLOC, smo, mos); 1496fa9e4066Sahrens mutex_exit(&vd->vdev_dtl_lock); 1497fa9e4066Sahrens 1498fa9e4066Sahrens return (error); 1499fa9e4066Sahrens } 1500fa9e4066Sahrens 1501fa9e4066Sahrens void 1502fa9e4066Sahrens vdev_dtl_sync(vdev_t *vd, uint64_t txg) 1503fa9e4066Sahrens { 1504fa9e4066Sahrens spa_t *spa = vd->vdev_spa; 1505*8ad4d6ddSJeff Bonwick space_map_obj_t *smo = &vd->vdev_dtl_smo; 1506*8ad4d6ddSJeff Bonwick space_map_t *sm = &vd->vdev_dtl[DTL_MISSING]; 1507ecc2d604Sbonwick objset_t *mos = spa->spa_meta_objset; 1508fa9e4066Sahrens space_map_t smsync; 1509fa9e4066Sahrens kmutex_t smlock; 1510fa9e4066Sahrens dmu_buf_t *db; 1511fa9e4066Sahrens dmu_tx_t *tx; 1512fa9e4066Sahrens 1513fa9e4066Sahrens tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 1514fa9e4066Sahrens 1515fa9e4066Sahrens if (vd->vdev_detached) { 1516fa9e4066Sahrens if (smo->smo_object != 0) { 1517ecc2d604Sbonwick int err = dmu_object_free(mos, smo->smo_object, tx); 1518fa9e4066Sahrens ASSERT3U(err, ==, 0); 1519fa9e4066Sahrens smo->smo_object = 0; 1520fa9e4066Sahrens } 1521fa9e4066Sahrens dmu_tx_commit(tx); 1522fa9e4066Sahrens return; 1523fa9e4066Sahrens } 1524fa9e4066Sahrens 1525fa9e4066Sahrens if (smo->smo_object == 0) { 1526fa9e4066Sahrens ASSERT(smo->smo_objsize == 0); 1527fa9e4066Sahrens ASSERT(smo->smo_alloc == 0); 1528ecc2d604Sbonwick smo->smo_object = dmu_object_alloc(mos, 1529fa9e4066Sahrens DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, 1530fa9e4066Sahrens DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); 1531fa9e4066Sahrens ASSERT(smo->smo_object != 0); 1532fa9e4066Sahrens vdev_config_dirty(vd->vdev_top); 1533fa9e4066Sahrens } 1534fa9e4066Sahrens 1535fa9e4066Sahrens mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); 1536fa9e4066Sahrens 1537fa9e4066Sahrens space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, 1538fa9e4066Sahrens &smlock); 1539fa9e4066Sahrens 1540fa9e4066Sahrens mutex_enter(&smlock); 1541fa9e4066Sahrens 1542fa9e4066Sahrens mutex_enter(&vd->vdev_dtl_lock); 1543ecc2d604Sbonwick space_map_walk(sm, space_map_add, &smsync); 1544fa9e4066Sahrens mutex_exit(&vd->vdev_dtl_lock); 1545fa9e4066Sahrens 1546ecc2d604Sbonwick space_map_truncate(smo, mos, tx); 1547ecc2d604Sbonwick space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); 1548fa9e4066Sahrens 1549fa9e4066Sahrens space_map_destroy(&smsync); 1550fa9e4066Sahrens 1551fa9e4066Sahrens mutex_exit(&smlock); 1552fa9e4066Sahrens mutex_destroy(&smlock); 1553fa9e4066Sahrens 1554ecc2d604Sbonwick VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); 1555fa9e4066Sahrens dmu_buf_will_dirty(db, tx); 15561934e92fSmaybee ASSERT3U(db->db_size, >=, sizeof (*smo)); 15571934e92fSmaybee bcopy(smo, db->db_data, sizeof (*smo)); 1558ea8dc4b6Seschrock dmu_buf_rele(db, FTAG); 1559fa9e4066Sahrens 1560fa9e4066Sahrens dmu_tx_commit(tx); 1561fa9e4066Sahrens } 1562fa9e4066Sahrens 1563*8ad4d6ddSJeff Bonwick /* 1564*8ad4d6ddSJeff Bonwick * Determine whether the specified vdev can be offlined/detached/removed 1565*8ad4d6ddSJeff Bonwick * without losing data. 1566*8ad4d6ddSJeff Bonwick */ 1567*8ad4d6ddSJeff Bonwick boolean_t 1568*8ad4d6ddSJeff Bonwick vdev_dtl_required(vdev_t *vd) 1569*8ad4d6ddSJeff Bonwick { 1570*8ad4d6ddSJeff Bonwick spa_t *spa = vd->vdev_spa; 1571*8ad4d6ddSJeff Bonwick vdev_t *tvd = vd->vdev_top; 1572*8ad4d6ddSJeff Bonwick uint8_t cant_read = vd->vdev_cant_read; 1573*8ad4d6ddSJeff Bonwick boolean_t required; 1574*8ad4d6ddSJeff Bonwick 1575*8ad4d6ddSJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1576*8ad4d6ddSJeff Bonwick 1577*8ad4d6ddSJeff Bonwick if (vd == spa->spa_root_vdev || vd == tvd) 1578*8ad4d6ddSJeff Bonwick return (B_TRUE); 1579*8ad4d6ddSJeff Bonwick 1580*8ad4d6ddSJeff Bonwick /* 1581*8ad4d6ddSJeff Bonwick * Temporarily mark the device as unreadable, and then determine 1582*8ad4d6ddSJeff Bonwick * whether this results in any DTL outages in the top-level vdev. 1583*8ad4d6ddSJeff Bonwick * If not, we can safely offline/detach/remove the device. 1584*8ad4d6ddSJeff Bonwick */ 1585*8ad4d6ddSJeff Bonwick vd->vdev_cant_read = B_TRUE; 1586*8ad4d6ddSJeff Bonwick vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 1587*8ad4d6ddSJeff Bonwick required = !vdev_dtl_empty(tvd, DTL_OUTAGE); 1588*8ad4d6ddSJeff Bonwick vd->vdev_cant_read = cant_read; 1589*8ad4d6ddSJeff Bonwick vdev_dtl_reassess(tvd, 0, 0, B_FALSE); 1590*8ad4d6ddSJeff Bonwick 1591*8ad4d6ddSJeff Bonwick return (required); 1592*8ad4d6ddSJeff Bonwick } 1593*8ad4d6ddSJeff Bonwick 1594088f3894Sahrens /* 1595088f3894Sahrens * Determine if resilver is needed, and if so the txg range. 1596088f3894Sahrens */ 1597088f3894Sahrens boolean_t 1598088f3894Sahrens vdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) 1599088f3894Sahrens { 1600088f3894Sahrens boolean_t needed = B_FALSE; 1601088f3894Sahrens uint64_t thismin = UINT64_MAX; 1602088f3894Sahrens uint64_t thismax = 0; 1603088f3894Sahrens 1604088f3894Sahrens if (vd->vdev_children == 0) { 1605088f3894Sahrens mutex_enter(&vd->vdev_dtl_lock); 1606*8ad4d6ddSJeff Bonwick if (vd->vdev_dtl[DTL_MISSING].sm_space != 0 && 1607*8ad4d6ddSJeff Bonwick vdev_writeable(vd)) { 1608088f3894Sahrens space_seg_t *ss; 1609088f3894Sahrens 1610*8ad4d6ddSJeff Bonwick ss = avl_first(&vd->vdev_dtl[DTL_MISSING].sm_root); 1611088f3894Sahrens thismin = ss->ss_start - 1; 1612*8ad4d6ddSJeff Bonwick ss = avl_last(&vd->vdev_dtl[DTL_MISSING].sm_root); 1613088f3894Sahrens thismax = ss->ss_end; 1614088f3894Sahrens needed = B_TRUE; 1615088f3894Sahrens } 1616088f3894Sahrens mutex_exit(&vd->vdev_dtl_lock); 1617088f3894Sahrens } else { 1618*8ad4d6ddSJeff Bonwick for (int c = 0; c < vd->vdev_children; c++) { 1619088f3894Sahrens vdev_t *cvd = vd->vdev_child[c]; 1620088f3894Sahrens uint64_t cmin, cmax; 1621088f3894Sahrens 1622088f3894Sahrens if (vdev_resilver_needed(cvd, &cmin, &cmax)) { 1623088f3894Sahrens thismin = MIN(thismin, cmin); 1624088f3894Sahrens thismax = MAX(thismax, cmax); 1625088f3894Sahrens needed = B_TRUE; 1626088f3894Sahrens } 1627088f3894Sahrens } 1628088f3894Sahrens } 1629088f3894Sahrens 1630088f3894Sahrens if (needed && minp) { 1631088f3894Sahrens *minp = thismin; 1632088f3894Sahrens *maxp = thismax; 1633088f3894Sahrens } 1634088f3894Sahrens return (needed); 1635088f3894Sahrens } 1636088f3894Sahrens 1637560e6e96Seschrock void 1638ea8dc4b6Seschrock vdev_load(vdev_t *vd) 1639fa9e4066Sahrens { 1640fa9e4066Sahrens /* 1641fa9e4066Sahrens * Recursively load all children. 1642fa9e4066Sahrens */ 1643*8ad4d6ddSJeff Bonwick for (int c = 0; c < vd->vdev_children; c++) 1644560e6e96Seschrock vdev_load(vd->vdev_child[c]); 1645fa9e4066Sahrens 1646fa9e4066Sahrens /* 16470e34b6a7Sbonwick * If this is a top-level vdev, initialize its metaslabs. 1648fa9e4066Sahrens */ 1649560e6e96Seschrock if (vd == vd->vdev_top && 1650560e6e96Seschrock (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || 1651560e6e96Seschrock vdev_metaslab_init(vd, 0) != 0)) 1652560e6e96Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1653560e6e96Seschrock VDEV_AUX_CORRUPT_DATA); 1654fa9e4066Sahrens 1655fa9e4066Sahrens /* 1656fa9e4066Sahrens * If this is a leaf vdev, load its DTL. 1657fa9e4066Sahrens */ 1658560e6e96Seschrock if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) 1659560e6e96Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, 1660560e6e96Seschrock VDEV_AUX_CORRUPT_DATA); 1661fa9e4066Sahrens } 1662fa9e4066Sahrens 166399653d4eSeschrock /* 1664fa94a07fSbrendan * The special vdev case is used for hot spares and l2cache devices. Its 1665fa94a07fSbrendan * sole purpose it to set the vdev state for the associated vdev. To do this, 1666fa94a07fSbrendan * we make sure that we can open the underlying device, then try to read the 1667fa94a07fSbrendan * label, and make sure that the label is sane and that it hasn't been 1668fa94a07fSbrendan * repurposed to another pool. 166999653d4eSeschrock */ 167099653d4eSeschrock int 1671fa94a07fSbrendan vdev_validate_aux(vdev_t *vd) 167299653d4eSeschrock { 167399653d4eSeschrock nvlist_t *label; 167499653d4eSeschrock uint64_t guid, version; 167599653d4eSeschrock uint64_t state; 167699653d4eSeschrock 1677e14bb325SJeff Bonwick if (!vdev_readable(vd)) 1678c5904d13Seschrock return (0); 1679c5904d13Seschrock 168099653d4eSeschrock if ((label = vdev_label_read_config(vd)) == NULL) { 168199653d4eSeschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 168299653d4eSeschrock VDEV_AUX_CORRUPT_DATA); 168399653d4eSeschrock return (-1); 168499653d4eSeschrock } 168599653d4eSeschrock 168699653d4eSeschrock if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || 1687e7437265Sahrens version > SPA_VERSION || 168899653d4eSeschrock nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || 168999653d4eSeschrock guid != vd->vdev_guid || 169099653d4eSeschrock nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { 169199653d4eSeschrock vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, 169299653d4eSeschrock VDEV_AUX_CORRUPT_DATA); 169399653d4eSeschrock nvlist_free(label); 169499653d4eSeschrock return (-1); 169599653d4eSeschrock } 169699653d4eSeschrock 169799653d4eSeschrock /* 169899653d4eSeschrock * We don't actually check the pool state here. If it's in fact in 169999653d4eSeschrock * use by another pool, we update this fact on the fly when requested. 170099653d4eSeschrock */ 170199653d4eSeschrock nvlist_free(label); 170299653d4eSeschrock return (0); 170399653d4eSeschrock } 170499653d4eSeschrock 1705fa9e4066Sahrens void 1706fa9e4066Sahrens vdev_sync_done(vdev_t *vd, uint64_t txg) 1707fa9e4066Sahrens { 1708fa9e4066Sahrens metaslab_t *msp; 1709fa9e4066Sahrens 1710fa9e4066Sahrens while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) 1711fa9e4066Sahrens metaslab_sync_done(msp, txg); 1712fa9e4066Sahrens } 1713fa9e4066Sahrens 1714fa9e4066Sahrens void 1715fa9e4066Sahrens vdev_sync(vdev_t *vd, uint64_t txg) 1716fa9e4066Sahrens { 1717fa9e4066Sahrens spa_t *spa = vd->vdev_spa; 1718fa9e4066Sahrens vdev_t *lvd; 1719fa9e4066Sahrens metaslab_t *msp; 1720ecc2d604Sbonwick dmu_tx_t *tx; 1721fa9e4066Sahrens 1722ecc2d604Sbonwick if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { 1723ecc2d604Sbonwick ASSERT(vd == vd->vdev_top); 1724ecc2d604Sbonwick tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); 1725ecc2d604Sbonwick vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, 1726ecc2d604Sbonwick DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); 1727ecc2d604Sbonwick ASSERT(vd->vdev_ms_array != 0); 1728ecc2d604Sbonwick vdev_config_dirty(vd); 1729ecc2d604Sbonwick dmu_tx_commit(tx); 1730ecc2d604Sbonwick } 1731fa9e4066Sahrens 1732ecc2d604Sbonwick while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { 1733fa9e4066Sahrens metaslab_sync(msp, txg); 1734ecc2d604Sbonwick (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); 1735ecc2d604Sbonwick } 1736fa9e4066Sahrens 1737fa9e4066Sahrens while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) 1738fa9e4066Sahrens vdev_dtl_sync(lvd, txg); 1739fa9e4066Sahrens 1740fa9e4066Sahrens (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); 1741fa9e4066Sahrens } 1742fa9e4066Sahrens 1743fa9e4066Sahrens uint64_t 1744fa9e4066Sahrens vdev_psize_to_asize(vdev_t *vd, uint64_t psize) 1745fa9e4066Sahrens { 1746fa9e4066Sahrens return (vd->vdev_ops->vdev_op_asize(vd, psize)); 1747fa9e4066Sahrens } 1748fa9e4066Sahrens 17493d7072f8Seschrock /* 17503d7072f8Seschrock * Mark the given vdev faulted. A faulted vdev behaves as if the device could 17513d7072f8Seschrock * not be opened, and no I/O is attempted. 17523d7072f8Seschrock */ 1753fa9e4066Sahrens int 17543d7072f8Seschrock vdev_fault(spa_t *spa, uint64_t guid) 1755fa9e4066Sahrens { 1756c5904d13Seschrock vdev_t *vd; 1757fa9e4066Sahrens 1758e14bb325SJeff Bonwick spa_vdev_state_enter(spa); 1759fa9e4066Sahrens 1760c5904d13Seschrock if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 1761e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENODEV)); 1762e14bb325SJeff Bonwick 17633d7072f8Seschrock if (!vd->vdev_ops->vdev_op_leaf) 1764e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 1765fa9e4066Sahrens 17663d7072f8Seschrock /* 17673d7072f8Seschrock * Faulted state takes precedence over degraded. 17683d7072f8Seschrock */ 17693d7072f8Seschrock vd->vdev_faulted = 1ULL; 17703d7072f8Seschrock vd->vdev_degraded = 0ULL; 1771e14bb325SJeff Bonwick vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, VDEV_AUX_ERR_EXCEEDED); 17723d7072f8Seschrock 17733d7072f8Seschrock /* 17746988b9faSDavid Marker * If marking the vdev as faulted cause the top-level vdev to become 17753d7072f8Seschrock * unavailable, then back off and simply mark the vdev as degraded 17763d7072f8Seschrock * instead. 17773d7072f8Seschrock */ 1778c5904d13Seschrock if (vdev_is_dead(vd->vdev_top) && vd->vdev_aux == NULL) { 17793d7072f8Seschrock vd->vdev_degraded = 1ULL; 17803d7072f8Seschrock vd->vdev_faulted = 0ULL; 17813d7072f8Seschrock 17823d7072f8Seschrock /* 17833d7072f8Seschrock * If we reopen the device and it's not dead, only then do we 17843d7072f8Seschrock * mark it degraded. 17853d7072f8Seschrock */ 17863d7072f8Seschrock vdev_reopen(vd); 17873d7072f8Seschrock 17880a4e9518Sgw if (vdev_readable(vd)) { 17893d7072f8Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, 17903d7072f8Seschrock VDEV_AUX_ERR_EXCEEDED); 17913d7072f8Seschrock } 17923d7072f8Seschrock } 17933d7072f8Seschrock 1794e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, vd, 0)); 17953d7072f8Seschrock } 17963d7072f8Seschrock 17973d7072f8Seschrock /* 17983d7072f8Seschrock * Mark the given vdev degraded. A degraded vdev is purely an indication to the 17993d7072f8Seschrock * user that something is wrong. The vdev continues to operate as normal as far 18003d7072f8Seschrock * as I/O is concerned. 18013d7072f8Seschrock */ 18023d7072f8Seschrock int 18033d7072f8Seschrock vdev_degrade(spa_t *spa, uint64_t guid) 18043d7072f8Seschrock { 1805c5904d13Seschrock vdev_t *vd; 18060a4e9518Sgw 1807e14bb325SJeff Bonwick spa_vdev_state_enter(spa); 18083d7072f8Seschrock 1809c5904d13Seschrock if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 1810e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENODEV)); 1811e14bb325SJeff Bonwick 18120e34b6a7Sbonwick if (!vd->vdev_ops->vdev_op_leaf) 1813e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 18140e34b6a7Sbonwick 18153d7072f8Seschrock /* 18163d7072f8Seschrock * If the vdev is already faulted, then don't do anything. 18173d7072f8Seschrock */ 1818e14bb325SJeff Bonwick if (vd->vdev_faulted || vd->vdev_degraded) 1819e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, 0)); 18203d7072f8Seschrock 18213d7072f8Seschrock vd->vdev_degraded = 1ULL; 18223d7072f8Seschrock if (!vdev_is_dead(vd)) 18233d7072f8Seschrock vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, 18243d7072f8Seschrock VDEV_AUX_ERR_EXCEEDED); 18253d7072f8Seschrock 1826e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, vd, 0)); 18273d7072f8Seschrock } 18283d7072f8Seschrock 18293d7072f8Seschrock /* 18303d7072f8Seschrock * Online the given vdev. If 'unspare' is set, it implies two things. First, 18313d7072f8Seschrock * any attached spare device should be detached when the device finishes 18323d7072f8Seschrock * resilvering. Second, the online should be treated like a 'test' online case, 18333d7072f8Seschrock * so no FMA events are generated if the device fails to open. 18343d7072f8Seschrock */ 18353d7072f8Seschrock int 1836e14bb325SJeff Bonwick vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) 18373d7072f8Seschrock { 1838c5904d13Seschrock vdev_t *vd; 18393d7072f8Seschrock 1840e14bb325SJeff Bonwick spa_vdev_state_enter(spa); 18413d7072f8Seschrock 1842c5904d13Seschrock if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 1843e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENODEV)); 18443d7072f8Seschrock 18453d7072f8Seschrock if (!vd->vdev_ops->vdev_op_leaf) 1846e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 1847fa9e4066Sahrens 1848fa9e4066Sahrens vd->vdev_offline = B_FALSE; 1849441d80aaSlling vd->vdev_tmpoffline = B_FALSE; 1850e14bb325SJeff Bonwick vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); 1851e14bb325SJeff Bonwick vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); 1852ea8dc4b6Seschrock vdev_reopen(vd->vdev_top); 18533d7072f8Seschrock vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; 18543d7072f8Seschrock 18553d7072f8Seschrock if (newstate) 18563d7072f8Seschrock *newstate = vd->vdev_state; 18573d7072f8Seschrock if ((flags & ZFS_ONLINE_UNSPARE) && 18583d7072f8Seschrock !vdev_is_dead(vd) && vd->vdev_parent && 18593d7072f8Seschrock vd->vdev_parent->vdev_ops == &vdev_spare_ops && 18603d7072f8Seschrock vd->vdev_parent->vdev_child[0] == vd) 18613d7072f8Seschrock vd->vdev_unspare = B_TRUE; 1862fa9e4066Sahrens 1863*8ad4d6ddSJeff Bonwick return (spa_vdev_state_exit(spa, vd, 0)); 1864fa9e4066Sahrens } 1865fa9e4066Sahrens 1866fa9e4066Sahrens int 18673d7072f8Seschrock vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) 1868fa9e4066Sahrens { 1869c5904d13Seschrock vdev_t *vd; 18700a4e9518Sgw 1871e14bb325SJeff Bonwick spa_vdev_state_enter(spa); 1872fa9e4066Sahrens 1873c5904d13Seschrock if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 1874e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENODEV)); 1875fa9e4066Sahrens 18760e34b6a7Sbonwick if (!vd->vdev_ops->vdev_op_leaf) 1877e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 18780e34b6a7Sbonwick 1879fa9e4066Sahrens /* 1880ecc2d604Sbonwick * If the device isn't already offline, try to offline it. 1881fa9e4066Sahrens */ 1882ecc2d604Sbonwick if (!vd->vdev_offline) { 1883ecc2d604Sbonwick /* 1884*8ad4d6ddSJeff Bonwick * If this device has the only valid copy of some data, 1885*8ad4d6ddSJeff Bonwick * don't allow it to be offlined. 1886ecc2d604Sbonwick */ 1887*8ad4d6ddSJeff Bonwick if (vd->vdev_aux == NULL && vdev_dtl_required(vd)) 1888e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, EBUSY)); 1889fa9e4066Sahrens 1890ecc2d604Sbonwick /* 1891ecc2d604Sbonwick * Offline this device and reopen its top-level vdev. 1892ecc2d604Sbonwick * If this action results in the top-level vdev becoming 1893ecc2d604Sbonwick * unusable, undo it and fail the request. 1894ecc2d604Sbonwick */ 1895ecc2d604Sbonwick vd->vdev_offline = B_TRUE; 1896ea8dc4b6Seschrock vdev_reopen(vd->vdev_top); 1897*8ad4d6ddSJeff Bonwick if (vd->vdev_aux == NULL && vdev_is_dead(vd->vdev_top)) { 1898ecc2d604Sbonwick vd->vdev_offline = B_FALSE; 1899ecc2d604Sbonwick vdev_reopen(vd->vdev_top); 1900e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, NULL, EBUSY)); 1901ecc2d604Sbonwick } 1902fa9e4066Sahrens } 1903fa9e4066Sahrens 1904e14bb325SJeff Bonwick vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); 1905ecc2d604Sbonwick 1906e14bb325SJeff Bonwick return (spa_vdev_state_exit(spa, vd, 0)); 1907fa9e4066Sahrens } 1908fa9e4066Sahrens 1909ea8dc4b6Seschrock /* 1910ea8dc4b6Seschrock * Clear the error counts associated with this vdev. Unlike vdev_online() and 1911ea8dc4b6Seschrock * vdev_offline(), we assume the spa config is locked. We also clear all 1912ea8dc4b6Seschrock * children. If 'vd' is NULL, then the user wants to clear all vdevs. 1913ea8dc4b6Seschrock */ 1914ea8dc4b6Seschrock void 1915e14bb325SJeff Bonwick vdev_clear(spa_t *spa, vdev_t *vd) 1916fa9e4066Sahrens { 1917e14bb325SJeff Bonwick vdev_t *rvd = spa->spa_root_vdev; 1918e14bb325SJeff Bonwick 1919e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); 1920fa9e4066Sahrens 1921ea8dc4b6Seschrock if (vd == NULL) 1922e14bb325SJeff Bonwick vd = rvd; 1923fa9e4066Sahrens 1924ea8dc4b6Seschrock vd->vdev_stat.vs_read_errors = 0; 1925ea8dc4b6Seschrock vd->vdev_stat.vs_write_errors = 0; 1926ea8dc4b6Seschrock vd->vdev_stat.vs_checksum_errors = 0; 1927fa9e4066Sahrens 1928e14bb325SJeff Bonwick for (int c = 0; c < vd->vdev_children; c++) 1929e14bb325SJeff Bonwick vdev_clear(spa, vd->vdev_child[c]); 19303d7072f8Seschrock 19313d7072f8Seschrock /* 19328a79c1b5Sek * If we're in the FAULTED state or have experienced failed I/O, then 19338a79c1b5Sek * clear the persistent state and attempt to reopen the device. We 19348a79c1b5Sek * also mark the vdev config dirty, so that the new faulted state is 19358a79c1b5Sek * written out to disk. 19363d7072f8Seschrock */ 1937e14bb325SJeff Bonwick if (vd->vdev_faulted || vd->vdev_degraded || 1938e14bb325SJeff Bonwick !vdev_readable(vd) || !vdev_writeable(vd)) { 19398a79c1b5Sek 19403d7072f8Seschrock vd->vdev_faulted = vd->vdev_degraded = 0; 1941e14bb325SJeff Bonwick vd->vdev_cant_read = B_FALSE; 1942e14bb325SJeff Bonwick vd->vdev_cant_write = B_FALSE; 1943e14bb325SJeff Bonwick 19443d7072f8Seschrock vdev_reopen(vd); 19453d7072f8Seschrock 1946e14bb325SJeff Bonwick if (vd != rvd) 1947e14bb325SJeff Bonwick vdev_state_dirty(vd->vdev_top); 1948e14bb325SJeff Bonwick 1949e14bb325SJeff Bonwick if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) 1950bb8b5132Sek spa_async_request(spa, SPA_ASYNC_RESILVER); 19513d7072f8Seschrock 19523d7072f8Seschrock spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR); 19533d7072f8Seschrock } 1954fa9e4066Sahrens } 1955fa9e4066Sahrens 1956e14bb325SJeff Bonwick boolean_t 1957e14bb325SJeff Bonwick vdev_is_dead(vdev_t *vd) 19580a4e9518Sgw { 1959e14bb325SJeff Bonwick return (vd->vdev_state < VDEV_STATE_DEGRADED); 19600a4e9518Sgw } 19610a4e9518Sgw 1962e14bb325SJeff Bonwick boolean_t 1963e14bb325SJeff Bonwick vdev_readable(vdev_t *vd) 19640a4e9518Sgw { 1965e14bb325SJeff Bonwick return (!vdev_is_dead(vd) && !vd->vdev_cant_read); 19660a4e9518Sgw } 19670a4e9518Sgw 1968e14bb325SJeff Bonwick boolean_t 1969e14bb325SJeff Bonwick vdev_writeable(vdev_t *vd) 1970fa9e4066Sahrens { 1971e14bb325SJeff Bonwick return (!vdev_is_dead(vd) && !vd->vdev_cant_write); 1972fa9e4066Sahrens } 1973fa9e4066Sahrens 1974a31e6787SGeorge Wilson boolean_t 1975a31e6787SGeorge Wilson vdev_allocatable(vdev_t *vd) 1976a31e6787SGeorge Wilson { 1977*8ad4d6ddSJeff Bonwick uint64_t state = vd->vdev_state; 1978*8ad4d6ddSJeff Bonwick 1979a31e6787SGeorge Wilson /* 1980*8ad4d6ddSJeff Bonwick * We currently allow allocations from vdevs which may be in the 1981a31e6787SGeorge Wilson * process of reopening (i.e. VDEV_STATE_CLOSED). If the device 1982a31e6787SGeorge Wilson * fails to reopen then we'll catch it later when we're holding 1983*8ad4d6ddSJeff Bonwick * the proper locks. Note that we have to get the vdev state 1984*8ad4d6ddSJeff Bonwick * in a local variable because although it changes atomically, 1985*8ad4d6ddSJeff Bonwick * we're asking two separate questions about it. 1986a31e6787SGeorge Wilson */ 1987*8ad4d6ddSJeff Bonwick return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) && 1988a31e6787SGeorge Wilson !vd->vdev_cant_write); 1989a31e6787SGeorge Wilson } 1990a31e6787SGeorge Wilson 1991e14bb325SJeff Bonwick boolean_t 1992e14bb325SJeff Bonwick vdev_accessible(vdev_t *vd, zio_t *zio) 1993fa9e4066Sahrens { 1994e14bb325SJeff Bonwick ASSERT(zio->io_vd == vd); 1995fa9e4066Sahrens 1996e14bb325SJeff Bonwick if (vdev_is_dead(vd) || vd->vdev_remove_wanted) 1997e14bb325SJeff Bonwick return (B_FALSE); 1998fa9e4066Sahrens 1999e14bb325SJeff Bonwick if (zio->io_type == ZIO_TYPE_READ) 2000e14bb325SJeff Bonwick return (!vd->vdev_cant_read); 2001fa9e4066Sahrens 2002e14bb325SJeff Bonwick if (zio->io_type == ZIO_TYPE_WRITE) 2003e14bb325SJeff Bonwick return (!vd->vdev_cant_write); 2004fa9e4066Sahrens 2005e14bb325SJeff Bonwick return (B_TRUE); 2006fa9e4066Sahrens } 2007fa9e4066Sahrens 2008fa9e4066Sahrens /* 2009fa9e4066Sahrens * Get statistics for the given vdev. 2010fa9e4066Sahrens */ 2011fa9e4066Sahrens void 2012fa9e4066Sahrens vdev_get_stats(vdev_t *vd, vdev_stat_t *vs) 2013fa9e4066Sahrens { 2014fa9e4066Sahrens vdev_t *rvd = vd->vdev_spa->spa_root_vdev; 2015fa9e4066Sahrens 2016fa9e4066Sahrens mutex_enter(&vd->vdev_stat_lock); 2017fa9e4066Sahrens bcopy(&vd->vdev_stat, vs, sizeof (*vs)); 2018088f3894Sahrens vs->vs_scrub_errors = vd->vdev_spa->spa_scrub_errors; 2019fa9e4066Sahrens vs->vs_timestamp = gethrtime() - vs->vs_timestamp; 2020fa9e4066Sahrens vs->vs_state = vd->vdev_state; 20212a79c5feSlling vs->vs_rsize = vdev_get_rsize(vd); 2022fa9e4066Sahrens mutex_exit(&vd->vdev_stat_lock); 2023fa9e4066Sahrens 2024fa9e4066Sahrens /* 2025fa9e4066Sahrens * If we're getting stats on the root vdev, aggregate the I/O counts 2026fa9e4066Sahrens * over all top-level vdevs (i.e. the direct children of the root). 2027fa9e4066Sahrens */ 2028fa9e4066Sahrens if (vd == rvd) { 2029e14bb325SJeff Bonwick for (int c = 0; c < rvd->vdev_children; c++) { 2030fa9e4066Sahrens vdev_t *cvd = rvd->vdev_child[c]; 2031fa9e4066Sahrens vdev_stat_t *cvs = &cvd->vdev_stat; 2032fa9e4066Sahrens 2033fa9e4066Sahrens mutex_enter(&vd->vdev_stat_lock); 2034e14bb325SJeff Bonwick for (int t = 0; t < ZIO_TYPES; t++) { 2035fa9e4066Sahrens vs->vs_ops[t] += cvs->vs_ops[t]; 2036fa9e4066Sahrens vs->vs_bytes[t] += cvs->vs_bytes[t]; 2037fa9e4066Sahrens } 2038fa9e4066Sahrens vs->vs_scrub_examined += cvs->vs_scrub_examined; 2039fa9e4066Sahrens mutex_exit(&vd->vdev_stat_lock); 2040fa9e4066Sahrens } 2041fa9e4066Sahrens } 2042fa9e4066Sahrens } 2043fa9e4066Sahrens 2044fa94a07fSbrendan void 2045fa94a07fSbrendan vdev_clear_stats(vdev_t *vd) 2046fa94a07fSbrendan { 2047fa94a07fSbrendan mutex_enter(&vd->vdev_stat_lock); 2048fa94a07fSbrendan vd->vdev_stat.vs_space = 0; 2049fa94a07fSbrendan vd->vdev_stat.vs_dspace = 0; 2050fa94a07fSbrendan vd->vdev_stat.vs_alloc = 0; 2051fa94a07fSbrendan mutex_exit(&vd->vdev_stat_lock); 2052fa94a07fSbrendan } 2053fa94a07fSbrendan 2054fa9e4066Sahrens void 2055e14bb325SJeff Bonwick vdev_stat_update(zio_t *zio, uint64_t psize) 2056fa9e4066Sahrens { 2057*8ad4d6ddSJeff Bonwick spa_t *spa = zio->io_spa; 2058*8ad4d6ddSJeff Bonwick vdev_t *rvd = spa->spa_root_vdev; 2059e14bb325SJeff Bonwick vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; 2060fa9e4066Sahrens vdev_t *pvd; 2061fa9e4066Sahrens uint64_t txg = zio->io_txg; 2062fa9e4066Sahrens vdev_stat_t *vs = &vd->vdev_stat; 2063fa9e4066Sahrens zio_type_t type = zio->io_type; 2064fa9e4066Sahrens int flags = zio->io_flags; 2065fa9e4066Sahrens 2066e14bb325SJeff Bonwick /* 2067e14bb325SJeff Bonwick * If this i/o is a gang leader, it didn't do any actual work. 2068e14bb325SJeff Bonwick */ 2069e14bb325SJeff Bonwick if (zio->io_gang_tree) 2070e14bb325SJeff Bonwick return; 2071e14bb325SJeff Bonwick 2072fa9e4066Sahrens if (zio->io_error == 0) { 2073e14bb325SJeff Bonwick /* 2074e14bb325SJeff Bonwick * If this is a root i/o, don't count it -- we've already 2075e14bb325SJeff Bonwick * counted the top-level vdevs, and vdev_get_stats() will 2076e14bb325SJeff Bonwick * aggregate them when asked. This reduces contention on 2077e14bb325SJeff Bonwick * the root vdev_stat_lock and implicitly handles blocks 2078e14bb325SJeff Bonwick * that compress away to holes, for which there is no i/o. 2079e14bb325SJeff Bonwick * (Holes never create vdev children, so all the counters 2080e14bb325SJeff Bonwick * remain zero, which is what we want.) 2081e14bb325SJeff Bonwick * 2082e14bb325SJeff Bonwick * Note: this only applies to successful i/o (io_error == 0) 2083e14bb325SJeff Bonwick * because unlike i/o counts, errors are not additive. 2084e14bb325SJeff Bonwick * When reading a ditto block, for example, failure of 2085e14bb325SJeff Bonwick * one top-level vdev does not imply a root-level error. 2086e14bb325SJeff Bonwick */ 2087e14bb325SJeff Bonwick if (vd == rvd) 2088e14bb325SJeff Bonwick return; 2089e14bb325SJeff Bonwick 2090e14bb325SJeff Bonwick ASSERT(vd == zio->io_vd); 2091*8ad4d6ddSJeff Bonwick 2092*8ad4d6ddSJeff Bonwick if (flags & ZIO_FLAG_IO_BYPASS) 2093*8ad4d6ddSJeff Bonwick return; 2094*8ad4d6ddSJeff Bonwick 2095*8ad4d6ddSJeff Bonwick mutex_enter(&vd->vdev_stat_lock); 2096*8ad4d6ddSJeff Bonwick 2097e14bb325SJeff Bonwick if (flags & ZIO_FLAG_IO_REPAIR) { 2098d80c45e0Sbonwick if (flags & ZIO_FLAG_SCRUB_THREAD) 2099e14bb325SJeff Bonwick vs->vs_scrub_repaired += psize; 2100*8ad4d6ddSJeff Bonwick if (flags & ZIO_FLAG_SELF_HEAL) 2101e14bb325SJeff Bonwick vs->vs_self_healed += psize; 2102fa9e4066Sahrens } 2103*8ad4d6ddSJeff Bonwick 2104*8ad4d6ddSJeff Bonwick vs->vs_ops[type]++; 2105*8ad4d6ddSJeff Bonwick vs->vs_bytes[type] += psize; 2106*8ad4d6ddSJeff Bonwick 2107*8ad4d6ddSJeff Bonwick mutex_exit(&vd->vdev_stat_lock); 2108fa9e4066Sahrens return; 2109fa9e4066Sahrens } 2110fa9e4066Sahrens 2111fa9e4066Sahrens if (flags & ZIO_FLAG_SPECULATIVE) 2112fa9e4066Sahrens return; 2113fa9e4066Sahrens 2114e14bb325SJeff Bonwick mutex_enter(&vd->vdev_stat_lock); 2115e14bb325SJeff Bonwick if (type == ZIO_TYPE_READ) { 2116e14bb325SJeff Bonwick if (zio->io_error == ECKSUM) 2117e14bb325SJeff Bonwick vs->vs_checksum_errors++; 2118e14bb325SJeff Bonwick else 2119e14bb325SJeff Bonwick vs->vs_read_errors++; 2120fa9e4066Sahrens } 2121e14bb325SJeff Bonwick if (type == ZIO_TYPE_WRITE) 2122e14bb325SJeff Bonwick vs->vs_write_errors++; 2123e14bb325SJeff Bonwick mutex_exit(&vd->vdev_stat_lock); 2124fa9e4066Sahrens 2125*8ad4d6ddSJeff Bonwick if (type == ZIO_TYPE_WRITE && txg != 0 && 2126*8ad4d6ddSJeff Bonwick (!(flags & ZIO_FLAG_IO_REPAIR) || 2127*8ad4d6ddSJeff Bonwick (flags & ZIO_FLAG_SCRUB_THREAD))) { 2128*8ad4d6ddSJeff Bonwick /* 2129*8ad4d6ddSJeff Bonwick * This is either a normal write (not a repair), or it's a 2130*8ad4d6ddSJeff Bonwick * repair induced by the scrub thread. In the normal case, 2131*8ad4d6ddSJeff Bonwick * we commit the DTL change in the same txg as the block 2132*8ad4d6ddSJeff Bonwick * was born. In the scrub-induced repair case, we know that 2133*8ad4d6ddSJeff Bonwick * scrubs run in first-pass syncing context, so we commit 2134*8ad4d6ddSJeff Bonwick * the DTL change in spa->spa_syncing_txg. 2135*8ad4d6ddSJeff Bonwick * 2136*8ad4d6ddSJeff Bonwick * We currently do not make DTL entries for failed spontaneous 2137*8ad4d6ddSJeff Bonwick * self-healing writes triggered by normal (non-scrubbing) 2138*8ad4d6ddSJeff Bonwick * reads, because we have no transactional context in which to 2139*8ad4d6ddSJeff Bonwick * do so -- and it's not clear that it'd be desirable anyway. 2140*8ad4d6ddSJeff Bonwick */ 2141*8ad4d6ddSJeff Bonwick if (vd->vdev_ops->vdev_op_leaf) { 2142*8ad4d6ddSJeff Bonwick uint64_t commit_txg = txg; 2143*8ad4d6ddSJeff Bonwick if (flags & ZIO_FLAG_SCRUB_THREAD) { 2144*8ad4d6ddSJeff Bonwick ASSERT(flags & ZIO_FLAG_IO_REPAIR); 2145*8ad4d6ddSJeff Bonwick ASSERT(spa_sync_pass(spa) == 1); 2146*8ad4d6ddSJeff Bonwick vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1); 2147*8ad4d6ddSJeff Bonwick commit_txg = spa->spa_syncing_txg; 2148*8ad4d6ddSJeff Bonwick } 2149*8ad4d6ddSJeff Bonwick ASSERT(commit_txg >= spa->spa_syncing_txg); 2150*8ad4d6ddSJeff Bonwick if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1)) 2151fa9e4066Sahrens return; 2152*8ad4d6ddSJeff Bonwick for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) 2153*8ad4d6ddSJeff Bonwick vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1); 2154*8ad4d6ddSJeff Bonwick vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg); 2155fa9e4066Sahrens } 2156*8ad4d6ddSJeff Bonwick if (vd != rvd) 2157*8ad4d6ddSJeff Bonwick vdev_dtl_dirty(vd, DTL_MISSING, txg, 1); 2158fa9e4066Sahrens } 2159fa9e4066Sahrens } 2160fa9e4066Sahrens 2161fa9e4066Sahrens void 2162fa9e4066Sahrens vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, boolean_t complete) 2163fa9e4066Sahrens { 2164fa9e4066Sahrens int c; 2165fa9e4066Sahrens vdev_stat_t *vs = &vd->vdev_stat; 2166fa9e4066Sahrens 2167fa9e4066Sahrens for (c = 0; c < vd->vdev_children; c++) 2168fa9e4066Sahrens vdev_scrub_stat_update(vd->vdev_child[c], type, complete); 2169fa9e4066Sahrens 2170fa9e4066Sahrens mutex_enter(&vd->vdev_stat_lock); 2171fa9e4066Sahrens 2172fa9e4066Sahrens if (type == POOL_SCRUB_NONE) { 2173fa9e4066Sahrens /* 2174fa9e4066Sahrens * Update completion and end time. Leave everything else alone 2175fa9e4066Sahrens * so we can report what happened during the previous scrub. 2176fa9e4066Sahrens */ 2177fa9e4066Sahrens vs->vs_scrub_complete = complete; 2178fa9e4066Sahrens vs->vs_scrub_end = gethrestime_sec(); 2179fa9e4066Sahrens } else { 2180fa9e4066Sahrens vs->vs_scrub_type = type; 2181fa9e4066Sahrens vs->vs_scrub_complete = 0; 2182fa9e4066Sahrens vs->vs_scrub_examined = 0; 2183fa9e4066Sahrens vs->vs_scrub_repaired = 0; 2184fa9e4066Sahrens vs->vs_scrub_start = gethrestime_sec(); 2185fa9e4066Sahrens vs->vs_scrub_end = 0; 2186fa9e4066Sahrens } 2187fa9e4066Sahrens 2188fa9e4066Sahrens mutex_exit(&vd->vdev_stat_lock); 2189fa9e4066Sahrens } 2190fa9e4066Sahrens 2191fa9e4066Sahrens /* 2192fa9e4066Sahrens * Update the in-core space usage stats for this vdev and the root vdev. 2193fa9e4066Sahrens */ 2194fa9e4066Sahrens void 2195fa94a07fSbrendan vdev_space_update(vdev_t *vd, int64_t space_delta, int64_t alloc_delta, 2196fa94a07fSbrendan boolean_t update_root) 2197fa9e4066Sahrens { 219899653d4eSeschrock int64_t dspace_delta = space_delta; 21998654d025Sperrin spa_t *spa = vd->vdev_spa; 22008654d025Sperrin vdev_t *rvd = spa->spa_root_vdev; 2201fa9e4066Sahrens 22028654d025Sperrin ASSERT(vd == vd->vdev_top); 220399653d4eSeschrock 22048654d025Sperrin /* 22058654d025Sperrin * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion 22068654d025Sperrin * factor. We must calculate this here and not at the root vdev 22078654d025Sperrin * because the root vdev's psize-to-asize is simply the max of its 22088654d025Sperrin * childrens', thus not accurate enough for us. 22098654d025Sperrin */ 22108654d025Sperrin ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); 22118654d025Sperrin dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * 22128654d025Sperrin vd->vdev_deflate_ratio; 22138654d025Sperrin 22148654d025Sperrin mutex_enter(&vd->vdev_stat_lock); 22158654d025Sperrin vd->vdev_stat.vs_space += space_delta; 22168654d025Sperrin vd->vdev_stat.vs_alloc += alloc_delta; 22178654d025Sperrin vd->vdev_stat.vs_dspace += dspace_delta; 22188654d025Sperrin mutex_exit(&vd->vdev_stat_lock); 22198654d025Sperrin 2220fa94a07fSbrendan if (update_root) { 2221fa94a07fSbrendan ASSERT(rvd == vd->vdev_parent); 2222fa94a07fSbrendan ASSERT(vd->vdev_ms_count != 0); 2223fa94a07fSbrendan 2224fa94a07fSbrendan /* 2225fa94a07fSbrendan * Don't count non-normal (e.g. intent log) space as part of 2226fa94a07fSbrendan * the pool's capacity. 2227fa94a07fSbrendan */ 2228fa94a07fSbrendan if (vd->vdev_mg->mg_class != spa->spa_normal_class) 2229fa94a07fSbrendan return; 22308654d025Sperrin 2231fa94a07fSbrendan mutex_enter(&rvd->vdev_stat_lock); 2232fa94a07fSbrendan rvd->vdev_stat.vs_space += space_delta; 2233fa94a07fSbrendan rvd->vdev_stat.vs_alloc += alloc_delta; 2234fa94a07fSbrendan rvd->vdev_stat.vs_dspace += dspace_delta; 2235fa94a07fSbrendan mutex_exit(&rvd->vdev_stat_lock); 2236fa94a07fSbrendan } 2237fa9e4066Sahrens } 2238fa9e4066Sahrens 2239fa9e4066Sahrens /* 2240fa9e4066Sahrens * Mark a top-level vdev's config as dirty, placing it on the dirty list 2241fa9e4066Sahrens * so that it will be written out next time the vdev configuration is synced. 2242fa9e4066Sahrens * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. 2243fa9e4066Sahrens */ 2244fa9e4066Sahrens void 2245fa9e4066Sahrens vdev_config_dirty(vdev_t *vd) 2246fa9e4066Sahrens { 2247fa9e4066Sahrens spa_t *spa = vd->vdev_spa; 2248fa9e4066Sahrens vdev_t *rvd = spa->spa_root_vdev; 2249fa9e4066Sahrens int c; 2250fa9e4066Sahrens 2251c5904d13Seschrock /* 2252c5904d13Seschrock * If this is an aux vdev (as with l2cache devices), then we update the 2253c5904d13Seschrock * vdev config manually and set the sync flag. 2254c5904d13Seschrock */ 2255c5904d13Seschrock if (vd->vdev_aux != NULL) { 2256c5904d13Seschrock spa_aux_vdev_t *sav = vd->vdev_aux; 2257c5904d13Seschrock nvlist_t **aux; 2258c5904d13Seschrock uint_t naux; 2259c5904d13Seschrock 2260c5904d13Seschrock for (c = 0; c < sav->sav_count; c++) { 2261c5904d13Seschrock if (sav->sav_vdevs[c] == vd) 2262c5904d13Seschrock break; 2263c5904d13Seschrock } 2264c5904d13Seschrock 2265e14bb325SJeff Bonwick if (c == sav->sav_count) { 2266e14bb325SJeff Bonwick /* 2267e14bb325SJeff Bonwick * We're being removed. There's nothing more to do. 2268e14bb325SJeff Bonwick */ 2269e14bb325SJeff Bonwick ASSERT(sav->sav_sync == B_TRUE); 2270e14bb325SJeff Bonwick return; 2271e14bb325SJeff Bonwick } 2272e14bb325SJeff Bonwick 2273c5904d13Seschrock sav->sav_sync = B_TRUE; 2274c5904d13Seschrock 2275c5904d13Seschrock VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 2276c5904d13Seschrock ZPOOL_CONFIG_L2CACHE, &aux, &naux) == 0); 2277c5904d13Seschrock 2278c5904d13Seschrock ASSERT(c < naux); 2279c5904d13Seschrock 2280c5904d13Seschrock /* 2281c5904d13Seschrock * Setting the nvlist in the middle if the array is a little 2282c5904d13Seschrock * sketchy, but it will work. 2283c5904d13Seschrock */ 2284c5904d13Seschrock nvlist_free(aux[c]); 2285c5904d13Seschrock aux[c] = vdev_config_generate(spa, vd, B_TRUE, B_FALSE, B_TRUE); 2286c5904d13Seschrock 2287c5904d13Seschrock return; 2288c5904d13Seschrock } 2289c5904d13Seschrock 22905dabedeeSbonwick /* 2291e14bb325SJeff Bonwick * The dirty list is protected by the SCL_CONFIG lock. The caller 2292e14bb325SJeff Bonwick * must either hold SCL_CONFIG as writer, or must be the sync thread 2293e14bb325SJeff Bonwick * (which holds SCL_CONFIG as reader). There's only one sync thread, 22945dabedeeSbonwick * so this is sufficient to ensure mutual exclusion. 22955dabedeeSbonwick */ 2296e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 2297e14bb325SJeff Bonwick (dsl_pool_sync_context(spa_get_dsl(spa)) && 2298e14bb325SJeff Bonwick spa_config_held(spa, SCL_CONFIG, RW_READER))); 22995dabedeeSbonwick 2300fa9e4066Sahrens if (vd == rvd) { 2301fa9e4066Sahrens for (c = 0; c < rvd->vdev_children; c++) 2302fa9e4066Sahrens vdev_config_dirty(rvd->vdev_child[c]); 2303fa9e4066Sahrens } else { 2304fa9e4066Sahrens ASSERT(vd == vd->vdev_top); 2305fa9e4066Sahrens 2306e14bb325SJeff Bonwick if (!list_link_active(&vd->vdev_config_dirty_node)) 2307e14bb325SJeff Bonwick list_insert_head(&spa->spa_config_dirty_list, vd); 2308fa9e4066Sahrens } 2309fa9e4066Sahrens } 2310fa9e4066Sahrens 2311fa9e4066Sahrens void 2312fa9e4066Sahrens vdev_config_clean(vdev_t *vd) 2313fa9e4066Sahrens { 23145dabedeeSbonwick spa_t *spa = vd->vdev_spa; 23155dabedeeSbonwick 2316e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || 2317e14bb325SJeff Bonwick (dsl_pool_sync_context(spa_get_dsl(spa)) && 2318e14bb325SJeff Bonwick spa_config_held(spa, SCL_CONFIG, RW_READER))); 23195dabedeeSbonwick 2320e14bb325SJeff Bonwick ASSERT(list_link_active(&vd->vdev_config_dirty_node)); 2321e14bb325SJeff Bonwick list_remove(&spa->spa_config_dirty_list, vd); 2322e14bb325SJeff Bonwick } 2323e14bb325SJeff Bonwick 2324e14bb325SJeff Bonwick /* 2325e14bb325SJeff Bonwick * Mark a top-level vdev's state as dirty, so that the next pass of 2326e14bb325SJeff Bonwick * spa_sync() can convert this into vdev_config_dirty(). We distinguish 2327e14bb325SJeff Bonwick * the state changes from larger config changes because they require 2328e14bb325SJeff Bonwick * much less locking, and are often needed for administrative actions. 2329e14bb325SJeff Bonwick */ 2330e14bb325SJeff Bonwick void 2331e14bb325SJeff Bonwick vdev_state_dirty(vdev_t *vd) 2332e14bb325SJeff Bonwick { 2333e14bb325SJeff Bonwick spa_t *spa = vd->vdev_spa; 2334e14bb325SJeff Bonwick 2335e14bb325SJeff Bonwick ASSERT(vd == vd->vdev_top); 2336e14bb325SJeff Bonwick 2337e14bb325SJeff Bonwick /* 2338e14bb325SJeff Bonwick * The state list is protected by the SCL_STATE lock. The caller 2339e14bb325SJeff Bonwick * must either hold SCL_STATE as writer, or must be the sync thread 2340e14bb325SJeff Bonwick * (which holds SCL_STATE as reader). There's only one sync thread, 2341e14bb325SJeff Bonwick * so this is sufficient to ensure mutual exclusion. 2342e14bb325SJeff Bonwick */ 2343e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 2344e14bb325SJeff Bonwick (dsl_pool_sync_context(spa_get_dsl(spa)) && 2345e14bb325SJeff Bonwick spa_config_held(spa, SCL_STATE, RW_READER))); 2346e14bb325SJeff Bonwick 2347e14bb325SJeff Bonwick if (!list_link_active(&vd->vdev_state_dirty_node)) 2348e14bb325SJeff Bonwick list_insert_head(&spa->spa_state_dirty_list, vd); 2349e14bb325SJeff Bonwick } 2350e14bb325SJeff Bonwick 2351e14bb325SJeff Bonwick void 2352e14bb325SJeff Bonwick vdev_state_clean(vdev_t *vd) 2353e14bb325SJeff Bonwick { 2354e14bb325SJeff Bonwick spa_t *spa = vd->vdev_spa; 2355e14bb325SJeff Bonwick 2356e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || 2357e14bb325SJeff Bonwick (dsl_pool_sync_context(spa_get_dsl(spa)) && 2358e14bb325SJeff Bonwick spa_config_held(spa, SCL_STATE, RW_READER))); 2359e14bb325SJeff Bonwick 2360e14bb325SJeff Bonwick ASSERT(list_link_active(&vd->vdev_state_dirty_node)); 2361e14bb325SJeff Bonwick list_remove(&spa->spa_state_dirty_list, vd); 2362fa9e4066Sahrens } 2363fa9e4066Sahrens 236432b87932Sek /* 236532b87932Sek * Propagate vdev state up from children to parent. 236632b87932Sek */ 236744cd46caSbillm void 236844cd46caSbillm vdev_propagate_state(vdev_t *vd) 236944cd46caSbillm { 2370*8ad4d6ddSJeff Bonwick spa_t *spa = vd->vdev_spa; 2371*8ad4d6ddSJeff Bonwick vdev_t *rvd = spa->spa_root_vdev; 237244cd46caSbillm int degraded = 0, faulted = 0; 237344cd46caSbillm int corrupted = 0; 237444cd46caSbillm int c; 237544cd46caSbillm vdev_t *child; 237644cd46caSbillm 23773d7072f8Seschrock if (vd->vdev_children > 0) { 23783d7072f8Seschrock for (c = 0; c < vd->vdev_children; c++) { 23793d7072f8Seschrock child = vd->vdev_child[c]; 238051ece835Seschrock 2381e14bb325SJeff Bonwick if (!vdev_readable(child) || 2382*8ad4d6ddSJeff Bonwick (!vdev_writeable(child) && spa_writeable(spa))) { 238351ece835Seschrock /* 238451ece835Seschrock * Root special: if there is a top-level log 238551ece835Seschrock * device, treat the root vdev as if it were 238651ece835Seschrock * degraded. 238751ece835Seschrock */ 238851ece835Seschrock if (child->vdev_islog && vd == rvd) 238951ece835Seschrock degraded++; 239051ece835Seschrock else 239151ece835Seschrock faulted++; 239251ece835Seschrock } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { 23933d7072f8Seschrock degraded++; 239451ece835Seschrock } 239544cd46caSbillm 23963d7072f8Seschrock if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) 23973d7072f8Seschrock corrupted++; 23983d7072f8Seschrock } 239944cd46caSbillm 24003d7072f8Seschrock vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); 24013d7072f8Seschrock 24023d7072f8Seschrock /* 2403e14bb325SJeff Bonwick * Root special: if there is a top-level vdev that cannot be 24043d7072f8Seschrock * opened due to corrupted metadata, then propagate the root 24053d7072f8Seschrock * vdev's aux state as 'corrupt' rather than 'insufficient 24063d7072f8Seschrock * replicas'. 24073d7072f8Seschrock */ 24083d7072f8Seschrock if (corrupted && vd == rvd && 24093d7072f8Seschrock rvd->vdev_state == VDEV_STATE_CANT_OPEN) 24103d7072f8Seschrock vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, 24113d7072f8Seschrock VDEV_AUX_CORRUPT_DATA); 24123d7072f8Seschrock } 24133d7072f8Seschrock 241451ece835Seschrock if (vd->vdev_parent) 24153d7072f8Seschrock vdev_propagate_state(vd->vdev_parent); 241644cd46caSbillm } 241744cd46caSbillm 2418fa9e4066Sahrens /* 2419ea8dc4b6Seschrock * Set a vdev's state. If this is during an open, we don't update the parent 2420ea8dc4b6Seschrock * state, because we're in the process of opening children depth-first. 2421ea8dc4b6Seschrock * Otherwise, we propagate the change to the parent. 2422ea8dc4b6Seschrock * 2423ea8dc4b6Seschrock * If this routine places a device in a faulted state, an appropriate ereport is 2424ea8dc4b6Seschrock * generated. 2425fa9e4066Sahrens */ 2426fa9e4066Sahrens void 2427ea8dc4b6Seschrock vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) 2428fa9e4066Sahrens { 2429560e6e96Seschrock uint64_t save_state; 2430c5904d13Seschrock spa_t *spa = vd->vdev_spa; 2431ea8dc4b6Seschrock 2432ea8dc4b6Seschrock if (state == vd->vdev_state) { 2433ea8dc4b6Seschrock vd->vdev_stat.vs_aux = aux; 2434fa9e4066Sahrens return; 2435ea8dc4b6Seschrock } 2436ea8dc4b6Seschrock 2437560e6e96Seschrock save_state = vd->vdev_state; 2438fa9e4066Sahrens 2439fa9e4066Sahrens vd->vdev_state = state; 2440fa9e4066Sahrens vd->vdev_stat.vs_aux = aux; 2441fa9e4066Sahrens 24423d7072f8Seschrock /* 24433d7072f8Seschrock * If we are setting the vdev state to anything but an open state, then 24443d7072f8Seschrock * always close the underlying device. Otherwise, we keep accessible 24453d7072f8Seschrock * but invalid devices open forever. We don't call vdev_close() itself, 24463d7072f8Seschrock * because that implies some extra checks (offline, etc) that we don't 24473d7072f8Seschrock * want here. This is limited to leaf devices, because otherwise 24483d7072f8Seschrock * closing the device will affect other children. 24493d7072f8Seschrock */ 2450cbd2b15eSJeff Bonwick if (vdev_is_dead(vd) && vd->vdev_ops->vdev_op_leaf) 24513d7072f8Seschrock vd->vdev_ops->vdev_op_close(vd); 24523d7072f8Seschrock 24533d7072f8Seschrock if (vd->vdev_removed && 24543d7072f8Seschrock state == VDEV_STATE_CANT_OPEN && 24553d7072f8Seschrock (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { 24563d7072f8Seschrock /* 24573d7072f8Seschrock * If the previous state is set to VDEV_STATE_REMOVED, then this 24583d7072f8Seschrock * device was previously marked removed and someone attempted to 24593d7072f8Seschrock * reopen it. If this failed due to a nonexistent device, then 24603d7072f8Seschrock * keep the device in the REMOVED state. We also let this be if 24613d7072f8Seschrock * it is one of our special test online cases, which is only 24623d7072f8Seschrock * attempting to online the device and shouldn't generate an FMA 24633d7072f8Seschrock * fault. 24643d7072f8Seschrock */ 24653d7072f8Seschrock vd->vdev_state = VDEV_STATE_REMOVED; 24663d7072f8Seschrock vd->vdev_stat.vs_aux = VDEV_AUX_NONE; 24673d7072f8Seschrock } else if (state == VDEV_STATE_REMOVED) { 24683d7072f8Seschrock /* 24693d7072f8Seschrock * Indicate to the ZFS DE that this device has been removed, and 24703d7072f8Seschrock * any recent errors should be ignored. 24713d7072f8Seschrock */ 2472c5904d13Seschrock zfs_post_remove(spa, vd); 24733d7072f8Seschrock vd->vdev_removed = B_TRUE; 24743d7072f8Seschrock } else if (state == VDEV_STATE_CANT_OPEN) { 2475ea8dc4b6Seschrock /* 2476ea8dc4b6Seschrock * If we fail to open a vdev during an import, we mark it as 2477ea8dc4b6Seschrock * "not available", which signifies that it was never there to 2478ea8dc4b6Seschrock * begin with. Failure to open such a device is not considered 2479ea8dc4b6Seschrock * an error. 2480ea8dc4b6Seschrock */ 2481c5904d13Seschrock if (spa->spa_load_state == SPA_LOAD_IMPORT && 2482c5904d13Seschrock !spa->spa_import_faulted && 2483560e6e96Seschrock vd->vdev_ops->vdev_op_leaf) 2484560e6e96Seschrock vd->vdev_not_present = 1; 2485560e6e96Seschrock 2486560e6e96Seschrock /* 2487560e6e96Seschrock * Post the appropriate ereport. If the 'prevstate' field is 2488560e6e96Seschrock * set to something other than VDEV_STATE_UNKNOWN, it indicates 2489560e6e96Seschrock * that this is part of a vdev_reopen(). In this case, we don't 2490560e6e96Seschrock * want to post the ereport if the device was already in the 2491560e6e96Seschrock * CANT_OPEN state beforehand. 24923d7072f8Seschrock * 24933d7072f8Seschrock * If the 'checkremove' flag is set, then this is an attempt to 24943d7072f8Seschrock * online the device in response to an insertion event. If we 24953d7072f8Seschrock * hit this case, then we have detected an insertion event for a 24963d7072f8Seschrock * faulted or offline device that wasn't in the removed state. 24973d7072f8Seschrock * In this scenario, we don't post an ereport because we are 24983d7072f8Seschrock * about to replace the device, or attempt an online with 24993d7072f8Seschrock * vdev_forcefault, which will generate the fault for us. 2500560e6e96Seschrock */ 25013d7072f8Seschrock if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && 25023d7072f8Seschrock !vd->vdev_not_present && !vd->vdev_checkremove && 2503c5904d13Seschrock vd != spa->spa_root_vdev) { 2504ea8dc4b6Seschrock const char *class; 2505ea8dc4b6Seschrock 2506ea8dc4b6Seschrock switch (aux) { 2507ea8dc4b6Seschrock case VDEV_AUX_OPEN_FAILED: 2508ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; 2509ea8dc4b6Seschrock break; 2510ea8dc4b6Seschrock case VDEV_AUX_CORRUPT_DATA: 2511ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; 2512ea8dc4b6Seschrock break; 2513ea8dc4b6Seschrock case VDEV_AUX_NO_REPLICAS: 2514ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; 2515ea8dc4b6Seschrock break; 2516ea8dc4b6Seschrock case VDEV_AUX_BAD_GUID_SUM: 2517ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; 2518ea8dc4b6Seschrock break; 2519ea8dc4b6Seschrock case VDEV_AUX_TOO_SMALL: 2520ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; 2521ea8dc4b6Seschrock break; 2522ea8dc4b6Seschrock case VDEV_AUX_BAD_LABEL: 2523ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; 2524ea8dc4b6Seschrock break; 2525e14bb325SJeff Bonwick case VDEV_AUX_IO_FAILURE: 2526e14bb325SJeff Bonwick class = FM_EREPORT_ZFS_IO_FAILURE; 2527e14bb325SJeff Bonwick break; 2528ea8dc4b6Seschrock default: 2529ea8dc4b6Seschrock class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; 2530ea8dc4b6Seschrock } 2531ea8dc4b6Seschrock 2532c5904d13Seschrock zfs_ereport_post(class, spa, vd, NULL, save_state, 0); 2533ea8dc4b6Seschrock } 2534ea8dc4b6Seschrock 25353d7072f8Seschrock /* Erase any notion of persistent removed state */ 25363d7072f8Seschrock vd->vdev_removed = B_FALSE; 25373d7072f8Seschrock } else { 25383d7072f8Seschrock vd->vdev_removed = B_FALSE; 25393d7072f8Seschrock } 2540ea8dc4b6Seschrock 25413d7072f8Seschrock if (!isopen) 25423d7072f8Seschrock vdev_propagate_state(vd); 2543fa9e4066Sahrens } 254415e6edf1Sgw 254515e6edf1Sgw /* 254615e6edf1Sgw * Check the vdev configuration to ensure that it's capable of supporting 254715e6edf1Sgw * a root pool. Currently, we do not support RAID-Z or partial configuration. 254815e6edf1Sgw * In addition, only a single top-level vdev is allowed and none of the leaves 254915e6edf1Sgw * can be wholedisks. 255015e6edf1Sgw */ 255115e6edf1Sgw boolean_t 255215e6edf1Sgw vdev_is_bootable(vdev_t *vd) 255315e6edf1Sgw { 255415e6edf1Sgw int c; 255515e6edf1Sgw 255615e6edf1Sgw if (!vd->vdev_ops->vdev_op_leaf) { 255715e6edf1Sgw char *vdev_type = vd->vdev_ops->vdev_op_type; 255815e6edf1Sgw 255915e6edf1Sgw if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 && 256015e6edf1Sgw vd->vdev_children > 1) { 256115e6edf1Sgw return (B_FALSE); 256215e6edf1Sgw } else if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 || 256315e6edf1Sgw strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) { 256415e6edf1Sgw return (B_FALSE); 256515e6edf1Sgw } 256615e6edf1Sgw } else if (vd->vdev_wholedisk == 1) { 256715e6edf1Sgw return (B_FALSE); 256815e6edf1Sgw } 256915e6edf1Sgw 257015e6edf1Sgw for (c = 0; c < vd->vdev_children; c++) { 257115e6edf1Sgw if (!vdev_is_bootable(vd->vdev_child[c])) 257215e6edf1Sgw return (B_FALSE); 257315e6edf1Sgw } 257415e6edf1Sgw return (B_TRUE); 257515e6edf1Sgw } 2576