diff options
Diffstat (limited to 'sys/contrib/opensolaris/uts/common/fs/zfs/vdev.c')
| -rw-r--r-- | sys/contrib/opensolaris/uts/common/fs/zfs/vdev.c | 1915 |
1 files changed, 0 insertions, 1915 deletions
diff --git a/sys/contrib/opensolaris/uts/common/fs/zfs/vdev.c b/sys/contrib/opensolaris/uts/common/fs/zfs/vdev.c deleted file mode 100644 index b966099..0000000 --- a/sys/contrib/opensolaris/uts/common/fs/zfs/vdev.c +++ /dev/null @@ -1,1915 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License (the "License"). - * You may not use this file except in compliance with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ - -/* - * Copyright 2007 Sun Microsystems, Inc. All rights reserved. - * Use is subject to license terms. - */ - -#pragma ident "%Z%%M% %I% %E% SMI" - -#include <sys/zfs_context.h> -#include <sys/fm/fs/zfs.h> -#include <sys/spa.h> -#include <sys/spa_impl.h> -#include <sys/dmu.h> -#include <sys/dmu_tx.h> -#include <sys/vdev_impl.h> -#include <sys/uberblock_impl.h> -#include <sys/metaslab.h> -#include <sys/metaslab_impl.h> -#include <sys/space_map.h> -#include <sys/zio.h> -#include <sys/zap.h> -#include <sys/fs/zfs.h> - -SYSCTL_DECL(_vfs_zfs); -SYSCTL_NODE(_vfs_zfs, OID_AUTO, vdev, CTLFLAG_RW, 0, "ZFS VDEV"); - -/* - * Virtual device management. - */ - -static vdev_ops_t *vdev_ops_table[] = { - &vdev_root_ops, - &vdev_raidz_ops, - &vdev_mirror_ops, - &vdev_replacing_ops, - &vdev_spare_ops, -#ifdef _KERNEL - &vdev_geom_ops, -#else - &vdev_disk_ops, - &vdev_file_ops, -#endif - &vdev_missing_ops, - NULL -}; - -/* maximum scrub/resilver I/O queue */ -int zfs_scrub_limit = 70; - -/* - * Given a vdev type, return the appropriate ops vector. - */ -static vdev_ops_t * -vdev_getops(const char *type) -{ - vdev_ops_t *ops, **opspp; - - for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) - if (strcmp(ops->vdev_op_type, type) == 0) - break; - - return (ops); -} - -/* - * Default asize function: return the MAX of psize with the asize of - * all children. This is what's used by anything other than RAID-Z. - */ -uint64_t -vdev_default_asize(vdev_t *vd, uint64_t psize) -{ - uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); - uint64_t csize; - uint64_t c; - - for (c = 0; c < vd->vdev_children; c++) { - csize = vdev_psize_to_asize(vd->vdev_child[c], psize); - asize = MAX(asize, csize); - } - - return (asize); -} - -/* - * Get the replaceable or attachable device size. - * If the parent is a mirror or raidz, the replaceable size is the minimum - * psize of all its children. For the rest, just return our own psize. - * - * e.g. - * psize rsize - * root - - - * mirror/raidz - - - * disk1 20g 20g - * disk2 40g 20g - * disk3 80g 80g - */ -uint64_t -vdev_get_rsize(vdev_t *vd) -{ - vdev_t *pvd, *cvd; - uint64_t c, rsize; - - pvd = vd->vdev_parent; - - /* - * If our parent is NULL or the root, just return our own psize. - */ - if (pvd == NULL || pvd->vdev_parent == NULL) - return (vd->vdev_psize); - - rsize = 0; - - for (c = 0; c < pvd->vdev_children; c++) { - cvd = pvd->vdev_child[c]; - rsize = MIN(rsize - 1, cvd->vdev_psize - 1) + 1; - } - - return (rsize); -} - -vdev_t * -vdev_lookup_top(spa_t *spa, uint64_t vdev) -{ - vdev_t *rvd = spa->spa_root_vdev; - - if (vdev < rvd->vdev_children) - return (rvd->vdev_child[vdev]); - - return (NULL); -} - -vdev_t * -vdev_lookup_by_guid(vdev_t *vd, uint64_t guid) -{ - int c; - vdev_t *mvd; - - if (vd->vdev_guid == guid) - return (vd); - - for (c = 0; c < vd->vdev_children; c++) - if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != - NULL) - return (mvd); - - return (NULL); -} - -void -vdev_add_child(vdev_t *pvd, vdev_t *cvd) -{ - size_t oldsize, newsize; - uint64_t id = cvd->vdev_id; - vdev_t **newchild; - - ASSERT(spa_config_held(cvd->vdev_spa, RW_WRITER)); - ASSERT(cvd->vdev_parent == NULL); - - cvd->vdev_parent = pvd; - - if (pvd == NULL) - return; - - ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); - - oldsize = pvd->vdev_children * sizeof (vdev_t *); - pvd->vdev_children = MAX(pvd->vdev_children, id + 1); - newsize = pvd->vdev_children * sizeof (vdev_t *); - - newchild = kmem_zalloc(newsize, KM_SLEEP); - if (pvd->vdev_child != NULL) { - bcopy(pvd->vdev_child, newchild, oldsize); - kmem_free(pvd->vdev_child, oldsize); - } - - pvd->vdev_child = newchild; - pvd->vdev_child[id] = cvd; - - cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); - ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); - - /* - * Walk up all ancestors to update guid sum. - */ - for (; pvd != NULL; pvd = pvd->vdev_parent) - pvd->vdev_guid_sum += cvd->vdev_guid_sum; - - if (cvd->vdev_ops->vdev_op_leaf) - cvd->vdev_spa->spa_scrub_maxinflight += zfs_scrub_limit; -} - -void -vdev_remove_child(vdev_t *pvd, vdev_t *cvd) -{ - int c; - uint_t id = cvd->vdev_id; - - ASSERT(cvd->vdev_parent == pvd); - - if (pvd == NULL) - return; - - ASSERT(id < pvd->vdev_children); - ASSERT(pvd->vdev_child[id] == cvd); - - pvd->vdev_child[id] = NULL; - cvd->vdev_parent = NULL; - - for (c = 0; c < pvd->vdev_children; c++) - if (pvd->vdev_child[c]) - break; - - if (c == pvd->vdev_children) { - kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); - pvd->vdev_child = NULL; - pvd->vdev_children = 0; - } - - /* - * Walk up all ancestors to update guid sum. - */ - for (; pvd != NULL; pvd = pvd->vdev_parent) - pvd->vdev_guid_sum -= cvd->vdev_guid_sum; - - if (cvd->vdev_ops->vdev_op_leaf) - cvd->vdev_spa->spa_scrub_maxinflight -= zfs_scrub_limit; -} - -/* - * Remove any holes in the child array. - */ -void -vdev_compact_children(vdev_t *pvd) -{ - vdev_t **newchild, *cvd; - int oldc = pvd->vdev_children; - int newc, c; - - ASSERT(spa_config_held(pvd->vdev_spa, RW_WRITER)); - - for (c = newc = 0; c < oldc; c++) - if (pvd->vdev_child[c]) - newc++; - - newchild = kmem_alloc(newc * sizeof (vdev_t *), KM_SLEEP); - - for (c = newc = 0; c < oldc; c++) { - if ((cvd = pvd->vdev_child[c]) != NULL) { - newchild[newc] = cvd; - cvd->vdev_id = newc++; - } - } - - kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); - pvd->vdev_child = newchild; - pvd->vdev_children = newc; -} - -/* - * Allocate and minimally initialize a vdev_t. - */ -static vdev_t * -vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) -{ - vdev_t *vd; - - vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP); - - if (spa->spa_root_vdev == NULL) { - ASSERT(ops == &vdev_root_ops); - spa->spa_root_vdev = vd; - } - - if (guid == 0) { - if (spa->spa_root_vdev == vd) { - /* - * The root vdev's guid will also be the pool guid, - * which must be unique among all pools. - */ - while (guid == 0 || spa_guid_exists(guid, 0)) - guid = spa_get_random(-1ULL); - } else { - /* - * Any other vdev's guid must be unique within the pool. - */ - while (guid == 0 || - spa_guid_exists(spa_guid(spa), guid)) - guid = spa_get_random(-1ULL); - } - ASSERT(!spa_guid_exists(spa_guid(spa), guid)); - } - - vd->vdev_spa = spa; - vd->vdev_id = id; - vd->vdev_guid = guid; - vd->vdev_guid_sum = guid; - vd->vdev_ops = ops; - vd->vdev_state = VDEV_STATE_CLOSED; - - mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_DEFAULT, NULL); - mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); - space_map_create(&vd->vdev_dtl_map, 0, -1ULL, 0, &vd->vdev_dtl_lock); - space_map_create(&vd->vdev_dtl_scrub, 0, -1ULL, 0, &vd->vdev_dtl_lock); - txg_list_create(&vd->vdev_ms_list, - offsetof(struct metaslab, ms_txg_node)); - txg_list_create(&vd->vdev_dtl_list, - offsetof(struct vdev, vdev_dtl_node)); - vd->vdev_stat.vs_timestamp = gethrtime(); - - return (vd); -} - -/* - * Free a vdev_t that has been removed from service. - */ -static void -vdev_free_common(vdev_t *vd) -{ - spa_t *spa = vd->vdev_spa; - - if (vd->vdev_path) - spa_strfree(vd->vdev_path); - if (vd->vdev_devid) - spa_strfree(vd->vdev_devid); - - if (vd->vdev_isspare) - spa_spare_remove(vd); - - txg_list_destroy(&vd->vdev_ms_list); - txg_list_destroy(&vd->vdev_dtl_list); - mutex_enter(&vd->vdev_dtl_lock); - space_map_unload(&vd->vdev_dtl_map); - space_map_destroy(&vd->vdev_dtl_map); - space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); - space_map_destroy(&vd->vdev_dtl_scrub); - mutex_exit(&vd->vdev_dtl_lock); - mutex_destroy(&vd->vdev_dtl_lock); - mutex_destroy(&vd->vdev_stat_lock); - - if (vd == spa->spa_root_vdev) - spa->spa_root_vdev = NULL; - - kmem_free(vd, sizeof (vdev_t)); -} - -/* - * Allocate a new vdev. The 'alloctype' is used to control whether we are - * creating a new vdev or loading an existing one - the behavior is slightly - * different for each case. - */ -int -vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, - int alloctype) -{ - vdev_ops_t *ops; - char *type; - uint64_t guid = 0; - vdev_t *vd; - - ASSERT(spa_config_held(spa, RW_WRITER)); - - if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) - return (EINVAL); - - if ((ops = vdev_getops(type)) == NULL) - return (EINVAL); - - /* - * If this is a load, get the vdev guid from the nvlist. - * Otherwise, vdev_alloc_common() will generate one for us. - */ - if (alloctype == VDEV_ALLOC_LOAD) { - uint64_t label_id; - - if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || - label_id != id) - return (EINVAL); - - if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) - return (EINVAL); - } else if (alloctype == VDEV_ALLOC_SPARE) { - if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) - return (EINVAL); - } - - /* - * The first allocated vdev must be of type 'root'. - */ - if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) - return (EINVAL); - - vd = vdev_alloc_common(spa, id, guid, ops); - - if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) - vd->vdev_path = spa_strdup(vd->vdev_path); - if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) - vd->vdev_devid = spa_strdup(vd->vdev_devid); - - /* - * Set the nparity propery for RAID-Z vdevs. - */ - if (ops == &vdev_raidz_ops) { - if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, - &vd->vdev_nparity) == 0) { - /* - * Currently, we can only support 2 parity devices. - */ - if (vd->vdev_nparity > 2) - return (EINVAL); - /* - * Older versions can only support 1 parity device. - */ - if (vd->vdev_nparity == 2 && - spa_version(spa) < ZFS_VERSION_RAID6) - return (ENOTSUP); - - } else { - /* - * We require the parity to be specified for SPAs that - * support multiple parity levels. - */ - if (spa_version(spa) >= ZFS_VERSION_RAID6) - return (EINVAL); - - /* - * Otherwise, we default to 1 parity device for RAID-Z. - */ - vd->vdev_nparity = 1; - } - } else { - vd->vdev_nparity = 0; - } - - /* - * Set the whole_disk property. If it's not specified, leave the value - * as -1. - */ - if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, - &vd->vdev_wholedisk) != 0) - vd->vdev_wholedisk = -1ULL; - - /* - * Look for the 'not present' flag. This will only be set if the device - * was not present at the time of import. - */ - (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, - &vd->vdev_not_present); - - /* - * Get the alignment requirement. - */ - (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); - - /* - * If we're a top-level vdev, try to load the allocation parameters. - */ - if (parent && !parent->vdev_parent && alloctype == VDEV_ALLOC_LOAD) { - (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, - &vd->vdev_ms_array); - (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, - &vd->vdev_ms_shift); - (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, - &vd->vdev_asize); - } - - /* - * If we're a leaf vdev, try to load the DTL object and offline state. - */ - if (vd->vdev_ops->vdev_op_leaf && alloctype == VDEV_ALLOC_LOAD) { - (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, - &vd->vdev_dtl.smo_object); - (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, - &vd->vdev_offline); - } - - /* - * Add ourselves to the parent's list of children. - */ - vdev_add_child(parent, vd); - - *vdp = vd; - - return (0); -} - -void -vdev_free(vdev_t *vd) -{ - int c; - - /* - * vdev_free() implies closing the vdev first. This is simpler than - * trying to ensure complicated semantics for all callers. - */ - vdev_close(vd); - - ASSERT(!list_link_active(&vd->vdev_dirty_node)); - - /* - * Free all children. - */ - for (c = 0; c < vd->vdev_children; c++) - vdev_free(vd->vdev_child[c]); - - ASSERT(vd->vdev_child == NULL); - ASSERT(vd->vdev_guid_sum == vd->vdev_guid); - - /* - * Discard allocation state. - */ - if (vd == vd->vdev_top) - vdev_metaslab_fini(vd); - - ASSERT3U(vd->vdev_stat.vs_space, ==, 0); - ASSERT3U(vd->vdev_stat.vs_dspace, ==, 0); - ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0); - - /* - * Remove this vdev from its parent's child list. - */ - vdev_remove_child(vd->vdev_parent, vd); - - ASSERT(vd->vdev_parent == NULL); - - vdev_free_common(vd); -} - -/* - * Transfer top-level vdev state from svd to tvd. - */ -static void -vdev_top_transfer(vdev_t *svd, vdev_t *tvd) -{ - spa_t *spa = svd->vdev_spa; - metaslab_t *msp; - vdev_t *vd; - int t; - - ASSERT(tvd == tvd->vdev_top); - - tvd->vdev_ms_array = svd->vdev_ms_array; - tvd->vdev_ms_shift = svd->vdev_ms_shift; - tvd->vdev_ms_count = svd->vdev_ms_count; - - svd->vdev_ms_array = 0; - svd->vdev_ms_shift = 0; - svd->vdev_ms_count = 0; - - tvd->vdev_mg = svd->vdev_mg; - tvd->vdev_ms = svd->vdev_ms; - - svd->vdev_mg = NULL; - svd->vdev_ms = NULL; - - if (tvd->vdev_mg != NULL) - tvd->vdev_mg->mg_vd = tvd; - - tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; - tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; - tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; - - svd->vdev_stat.vs_alloc = 0; - svd->vdev_stat.vs_space = 0; - svd->vdev_stat.vs_dspace = 0; - - for (t = 0; t < TXG_SIZE; t++) { - while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) - (void) txg_list_add(&tvd->vdev_ms_list, msp, t); - while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) - (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); - if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) - (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); - } - - if (list_link_active(&svd->vdev_dirty_node)) { - vdev_config_clean(svd); - vdev_config_dirty(tvd); - } - - tvd->vdev_reopen_wanted = svd->vdev_reopen_wanted; - svd->vdev_reopen_wanted = 0; - - tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; - svd->vdev_deflate_ratio = 0; -} - -static void -vdev_top_update(vdev_t *tvd, vdev_t *vd) -{ - int c; - - if (vd == NULL) - return; - - vd->vdev_top = tvd; - - for (c = 0; c < vd->vdev_children; c++) - vdev_top_update(tvd, vd->vdev_child[c]); -} - -/* - * Add a mirror/replacing vdev above an existing vdev. - */ -vdev_t * -vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) -{ - spa_t *spa = cvd->vdev_spa; - vdev_t *pvd = cvd->vdev_parent; - vdev_t *mvd; - - ASSERT(spa_config_held(spa, RW_WRITER)); - - mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); - - mvd->vdev_asize = cvd->vdev_asize; - mvd->vdev_ashift = cvd->vdev_ashift; - mvd->vdev_state = cvd->vdev_state; - - vdev_remove_child(pvd, cvd); - vdev_add_child(pvd, mvd); - cvd->vdev_id = mvd->vdev_children; - vdev_add_child(mvd, cvd); - vdev_top_update(cvd->vdev_top, cvd->vdev_top); - - if (mvd == mvd->vdev_top) - vdev_top_transfer(cvd, mvd); - - return (mvd); -} - -/* - * Remove a 1-way mirror/replacing vdev from the tree. - */ -void -vdev_remove_parent(vdev_t *cvd) -{ - vdev_t *mvd = cvd->vdev_parent; - vdev_t *pvd = mvd->vdev_parent; - - ASSERT(spa_config_held(cvd->vdev_spa, RW_WRITER)); - - ASSERT(mvd->vdev_children == 1); - ASSERT(mvd->vdev_ops == &vdev_mirror_ops || - mvd->vdev_ops == &vdev_replacing_ops || - mvd->vdev_ops == &vdev_spare_ops); - cvd->vdev_ashift = mvd->vdev_ashift; - - vdev_remove_child(mvd, cvd); - vdev_remove_child(pvd, mvd); - cvd->vdev_id = mvd->vdev_id; - vdev_add_child(pvd, cvd); - /* - * If we created a new toplevel vdev, then we need to change the child's - * vdev GUID to match the old toplevel vdev. Otherwise, we could have - * detached an offline device, and when we go to import the pool we'll - * think we have two toplevel vdevs, instead of a different version of - * the same toplevel vdev. - */ - if (cvd->vdev_top == cvd) { - pvd->vdev_guid_sum -= cvd->vdev_guid; - cvd->vdev_guid_sum -= cvd->vdev_guid; - cvd->vdev_guid = mvd->vdev_guid; - cvd->vdev_guid_sum += mvd->vdev_guid; - pvd->vdev_guid_sum += cvd->vdev_guid; - } - vdev_top_update(cvd->vdev_top, cvd->vdev_top); - - if (cvd == cvd->vdev_top) - vdev_top_transfer(mvd, cvd); - - ASSERT(mvd->vdev_children == 0); - vdev_free(mvd); -} - -int -vdev_metaslab_init(vdev_t *vd, uint64_t txg) -{ - spa_t *spa = vd->vdev_spa; - objset_t *mos = spa->spa_meta_objset; - metaslab_class_t *mc = spa_metaslab_class_select(spa); - uint64_t m; - uint64_t oldc = vd->vdev_ms_count; - uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; - metaslab_t **mspp; - int error; - - if (vd->vdev_ms_shift == 0) /* not being allocated from yet */ - return (0); - - dprintf("%s oldc %llu newc %llu\n", vdev_description(vd), oldc, newc); - - ASSERT(oldc <= newc); - - if (vd->vdev_mg == NULL) - vd->vdev_mg = metaslab_group_create(mc, vd); - - mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); - - if (oldc != 0) { - bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); - kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); - } - - vd->vdev_ms = mspp; - vd->vdev_ms_count = newc; - - for (m = oldc; m < newc; m++) { - space_map_obj_t smo = { 0, 0, 0 }; - if (txg == 0) { - uint64_t object = 0; - error = dmu_read(mos, vd->vdev_ms_array, - m * sizeof (uint64_t), sizeof (uint64_t), &object); - if (error) - return (error); - if (object != 0) { - dmu_buf_t *db; - error = dmu_bonus_hold(mos, object, FTAG, &db); - if (error) - return (error); - ASSERT3U(db->db_size, ==, sizeof (smo)); - bcopy(db->db_data, &smo, db->db_size); - ASSERT3U(smo.smo_object, ==, object); - dmu_buf_rele(db, FTAG); - } - } - vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, - m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); - } - - return (0); -} - -void -vdev_metaslab_fini(vdev_t *vd) -{ - uint64_t m; - uint64_t count = vd->vdev_ms_count; - - if (vd->vdev_ms != NULL) { - for (m = 0; m < count; m++) - if (vd->vdev_ms[m] != NULL) - metaslab_fini(vd->vdev_ms[m]); - kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); - vd->vdev_ms = NULL; - } -} - -/* - * Prepare a virtual device for access. - */ -int -vdev_open(vdev_t *vd) -{ - int error; - int c; - uint64_t osize = 0; - uint64_t asize, psize; - uint64_t ashift = 0; - - ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || - vd->vdev_state == VDEV_STATE_CANT_OPEN || - vd->vdev_state == VDEV_STATE_OFFLINE); - - if (vd->vdev_fault_mode == VDEV_FAULT_COUNT) - vd->vdev_fault_arg >>= 1; - else - vd->vdev_fault_mode = VDEV_FAULT_NONE; - - vd->vdev_stat.vs_aux = VDEV_AUX_NONE; - - if (vd->vdev_ops->vdev_op_leaf) { - vdev_cache_init(vd); - vdev_queue_init(vd); - vd->vdev_cache_active = B_TRUE; - } - - if (vd->vdev_offline) { - ASSERT(vd->vdev_children == 0); - vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); - return (ENXIO); - } - - error = vd->vdev_ops->vdev_op_open(vd, &osize, &ashift); - - if (zio_injection_enabled && error == 0) - error = zio_handle_device_injection(vd, ENXIO); - - dprintf("%s = %d, osize %llu, state = %d\n", - vdev_description(vd), error, osize, vd->vdev_state); - - if (error) { - vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, - vd->vdev_stat.vs_aux); - return (error); - } - - vd->vdev_state = VDEV_STATE_HEALTHY; - - for (c = 0; c < vd->vdev_children; c++) - if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { - vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, - VDEV_AUX_NONE); - break; - } - - osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); - - if (vd->vdev_children == 0) { - if (osize < SPA_MINDEVSIZE) { - vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_TOO_SMALL); - return (EOVERFLOW); - } - psize = osize; - asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); - } else { - if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { - vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_TOO_SMALL); - return (EOVERFLOW); - } - psize = 0; - asize = osize; - } - - vd->vdev_psize = psize; - - if (vd->vdev_asize == 0) { - /* - * This is the first-ever open, so use the computed values. - * For testing purposes, a higher ashift can be requested. - */ - vd->vdev_asize = asize; - vd->vdev_ashift = MAX(ashift, vd->vdev_ashift); - } else { - /* - * Make sure the alignment requirement hasn't increased. - */ - if (ashift > vd->vdev_top->vdev_ashift) { - vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_BAD_LABEL); - return (EINVAL); - } - - /* - * Make sure the device hasn't shrunk. - */ - if (asize < vd->vdev_asize) { - vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_BAD_LABEL); - return (EINVAL); - } - - /* - * If all children are healthy and the asize has increased, - * then we've experienced dynamic LUN growth. - */ - if (vd->vdev_state == VDEV_STATE_HEALTHY && - asize > vd->vdev_asize) { - vd->vdev_asize = asize; - } - } - - /* - * If this is a top-level vdev, compute the raidz-deflation - * ratio. Note, we hard-code in 128k (1<<17) because it is the - * current "typical" blocksize. Even if SPA_MAXBLOCKSIZE - * changes, this algorithm must never change, or we will - * inconsistently account for existing bp's. - */ - if (vd->vdev_top == vd) { - vd->vdev_deflate_ratio = (1<<17) / - (vdev_psize_to_asize(vd, 1<<17) >> SPA_MINBLOCKSHIFT); - } - - /* - * This allows the ZFS DE to close cases appropriately. If a device - * goes away and later returns, we want to close the associated case. - * But it's not enough to simply post this only when a device goes from - * CANT_OPEN -> HEALTHY. If we reboot the system and the device is - * back, we also need to close the case (otherwise we will try to replay - * it). So we have to post this notifier every time. Since this only - * occurs during pool open or error recovery, this should not be an - * issue. - */ - zfs_post_ok(vd->vdev_spa, vd); - - return (0); -} - -/* - * Called once the vdevs are all opened, this routine validates the label - * contents. This needs to be done before vdev_load() so that we don't - * inadvertently do repair I/Os to the wrong device, and so that vdev_reopen() - * won't succeed if the device has been changed underneath. - * - * This function will only return failure if one of the vdevs indicates that it - * has since been destroyed or exported. This is only possible if - * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state - * will be updated but the function will return 0. - */ -int -vdev_validate(vdev_t *vd) -{ - spa_t *spa = vd->vdev_spa; - int c; - nvlist_t *label; - uint64_t guid; - uint64_t state; - - for (c = 0; c < vd->vdev_children; c++) - if (vdev_validate(vd->vdev_child[c]) != 0) - return (EBADF); - - /* - * If the device has already failed, or was marked offline, don't do - * any further validation. Otherwise, label I/O will fail and we will - * overwrite the previous state. - */ - if (vd->vdev_ops->vdev_op_leaf && !vdev_is_dead(vd)) { - - if ((label = vdev_label_read_config(vd)) == NULL) { - vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_BAD_LABEL); - return (0); - } - - if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, - &guid) != 0 || guid != spa_guid(spa)) { - vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - nvlist_free(label); - return (0); - } - - if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, - &guid) != 0 || guid != vd->vdev_guid) { - vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - nvlist_free(label); - return (0); - } - - if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, - &state) != 0) { - vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - nvlist_free(label); - return (0); - } - - nvlist_free(label); - - if (spa->spa_load_state == SPA_LOAD_OPEN && - state != POOL_STATE_ACTIVE) - return (EBADF); - } - - /* - * If we were able to open and validate a vdev that was previously - * marked permanently unavailable, clear that state now. - */ - if (vd->vdev_not_present) - vd->vdev_not_present = 0; - - return (0); -} - -/* - * Close a virtual device. - */ -void -vdev_close(vdev_t *vd) -{ - vd->vdev_ops->vdev_op_close(vd); - - if (vd->vdev_cache_active) { - vdev_cache_fini(vd); - vdev_queue_fini(vd); - vd->vdev_cache_active = B_FALSE; - } - - /* - * We record the previous state before we close it, so that if we are - * doing a reopen(), we don't generate FMA ereports if we notice that - * it's still faulted. - */ - vd->vdev_prevstate = vd->vdev_state; - - if (vd->vdev_offline) - vd->vdev_state = VDEV_STATE_OFFLINE; - else - vd->vdev_state = VDEV_STATE_CLOSED; - vd->vdev_stat.vs_aux = VDEV_AUX_NONE; -} - -void -vdev_reopen(vdev_t *vd) -{ - spa_t *spa = vd->vdev_spa; - - ASSERT(spa_config_held(spa, RW_WRITER)); - - vdev_close(vd); - (void) vdev_open(vd); - - /* - * Call vdev_validate() here to make sure we have the same device. - * Otherwise, a device with an invalid label could be successfully - * opened in response to vdev_reopen(). - * - * The downside to this is that if the user is simply experimenting by - * overwriting an entire disk, we'll fault the device rather than - * demonstrate self-healing capabilities. On the other hand, with - * proper FMA integration, the series of errors we'd see from the device - * would result in a faulted device anyway. Given that this doesn't - * model any real-world corruption, it's better to catch this here and - * correctly identify that the device has either changed beneath us, or - * is corrupted beyond recognition. - */ - (void) vdev_validate(vd); - - /* - * Reassess root vdev's health. - */ - vdev_propagate_state(spa->spa_root_vdev); -} - -int -vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) -{ - int error; - - /* - * Normally, partial opens (e.g. of a mirror) are allowed. - * For a create, however, we want to fail the request if - * there are any components we can't open. - */ - error = vdev_open(vd); - - if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { - vdev_close(vd); - return (error ? error : ENXIO); - } - - /* - * Recursively initialize all labels. - */ - if ((error = vdev_label_init(vd, txg, isreplacing ? - VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { - vdev_close(vd); - return (error); - } - - return (0); -} - -/* - * The is the latter half of vdev_create(). It is distinct because it - * involves initiating transactions in order to do metaslab creation. - * For creation, we want to try to create all vdevs at once and then undo it - * if anything fails; this is much harder if we have pending transactions. - */ -void -vdev_init(vdev_t *vd, uint64_t txg) -{ - /* - * Aim for roughly 200 metaslabs per vdev. - */ - vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); - vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); - - /* - * Initialize the vdev's metaslabs. This can't fail because - * there's nothing to read when creating all new metaslabs. - */ - VERIFY(vdev_metaslab_init(vd, txg) == 0); -} - -void -vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) -{ - ASSERT(vd == vd->vdev_top); - ASSERT(ISP2(flags)); - - if (flags & VDD_METASLAB) - (void) txg_list_add(&vd->vdev_ms_list, arg, txg); - - if (flags & VDD_DTL) - (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); - - (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); -} - -void -vdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size) -{ - mutex_enter(sm->sm_lock); - if (!space_map_contains(sm, txg, size)) - space_map_add(sm, txg, size); - mutex_exit(sm->sm_lock); -} - -int -vdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size) -{ - int dirty; - - /* - * Quick test without the lock -- covers the common case that - * there are no dirty time segments. - */ - if (sm->sm_space == 0) - return (0); - - mutex_enter(sm->sm_lock); - dirty = space_map_contains(sm, txg, size); - mutex_exit(sm->sm_lock); - - return (dirty); -} - -/* - * Reassess DTLs after a config change or scrub completion. - */ -void -vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) -{ - spa_t *spa = vd->vdev_spa; - int c; - - ASSERT(spa_config_held(spa, RW_WRITER)); - - if (vd->vdev_children == 0) { - mutex_enter(&vd->vdev_dtl_lock); - /* - * We're successfully scrubbed everything up to scrub_txg. - * Therefore, excise all old DTLs up to that point, then - * fold in the DTLs for everything we couldn't scrub. - */ - if (scrub_txg != 0) { - space_map_excise(&vd->vdev_dtl_map, 0, scrub_txg); - space_map_union(&vd->vdev_dtl_map, &vd->vdev_dtl_scrub); - } - if (scrub_done) - space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); - mutex_exit(&vd->vdev_dtl_lock); - if (txg != 0) - vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); - return; - } - - /* - * Make sure the DTLs are always correct under the scrub lock. - */ - if (vd == spa->spa_root_vdev) - mutex_enter(&spa->spa_scrub_lock); - - mutex_enter(&vd->vdev_dtl_lock); - space_map_vacate(&vd->vdev_dtl_map, NULL, NULL); - space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); - mutex_exit(&vd->vdev_dtl_lock); - - for (c = 0; c < vd->vdev_children; c++) { - vdev_t *cvd = vd->vdev_child[c]; - vdev_dtl_reassess(cvd, txg, scrub_txg, scrub_done); - mutex_enter(&vd->vdev_dtl_lock); - space_map_union(&vd->vdev_dtl_map, &cvd->vdev_dtl_map); - space_map_union(&vd->vdev_dtl_scrub, &cvd->vdev_dtl_scrub); - mutex_exit(&vd->vdev_dtl_lock); - } - - if (vd == spa->spa_root_vdev) - mutex_exit(&spa->spa_scrub_lock); -} - -static int -vdev_dtl_load(vdev_t *vd) -{ - spa_t *spa = vd->vdev_spa; - space_map_obj_t *smo = &vd->vdev_dtl; - objset_t *mos = spa->spa_meta_objset; - dmu_buf_t *db; - int error; - - ASSERT(vd->vdev_children == 0); - - if (smo->smo_object == 0) - return (0); - - if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) - return (error); - - ASSERT3U(db->db_size, ==, sizeof (*smo)); - bcopy(db->db_data, smo, db->db_size); - dmu_buf_rele(db, FTAG); - - mutex_enter(&vd->vdev_dtl_lock); - error = space_map_load(&vd->vdev_dtl_map, NULL, SM_ALLOC, smo, mos); - mutex_exit(&vd->vdev_dtl_lock); - - return (error); -} - -void -vdev_dtl_sync(vdev_t *vd, uint64_t txg) -{ - spa_t *spa = vd->vdev_spa; - space_map_obj_t *smo = &vd->vdev_dtl; - space_map_t *sm = &vd->vdev_dtl_map; - objset_t *mos = spa->spa_meta_objset; - space_map_t smsync; - kmutex_t smlock; - dmu_buf_t *db; - dmu_tx_t *tx; - - dprintf("%s in txg %llu pass %d\n", - vdev_description(vd), (u_longlong_t)txg, spa_sync_pass(spa)); - - tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); - - if (vd->vdev_detached) { - if (smo->smo_object != 0) { - int err = dmu_object_free(mos, smo->smo_object, tx); - ASSERT3U(err, ==, 0); - smo->smo_object = 0; - } - dmu_tx_commit(tx); - dprintf("detach %s committed in txg %llu\n", - vdev_description(vd), txg); - return; - } - - if (smo->smo_object == 0) { - ASSERT(smo->smo_objsize == 0); - ASSERT(smo->smo_alloc == 0); - smo->smo_object = dmu_object_alloc(mos, - DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, - DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); - ASSERT(smo->smo_object != 0); - vdev_config_dirty(vd->vdev_top); - } - - mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); - - space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, - &smlock); - - mutex_enter(&smlock); - - mutex_enter(&vd->vdev_dtl_lock); - space_map_walk(sm, space_map_add, &smsync); - mutex_exit(&vd->vdev_dtl_lock); - - space_map_truncate(smo, mos, tx); - space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); - - space_map_destroy(&smsync); - - mutex_exit(&smlock); - mutex_destroy(&smlock); - - VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); - dmu_buf_will_dirty(db, tx); - ASSERT3U(db->db_size, ==, sizeof (*smo)); - bcopy(smo, db->db_data, db->db_size); - dmu_buf_rele(db, FTAG); - - dmu_tx_commit(tx); -} - -void -vdev_load(vdev_t *vd) -{ - int c; - - /* - * Recursively load all children. - */ - for (c = 0; c < vd->vdev_children; c++) - vdev_load(vd->vdev_child[c]); - - /* - * If this is a top-level vdev, initialize its metaslabs. - */ - if (vd == vd->vdev_top && - (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || - vdev_metaslab_init(vd, 0) != 0)) - vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - - /* - * If this is a leaf vdev, load its DTL. - */ - if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) - vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); -} - -/* - * This special case of vdev_spare() is used for hot spares. It's sole purpose - * it to set the vdev state for the associated vdev. To do this, we make sure - * that we can open the underlying device, then try to read the label, and make - * sure that the label is sane and that it hasn't been repurposed to another - * pool. - */ -int -vdev_validate_spare(vdev_t *vd) -{ - nvlist_t *label; - uint64_t guid, version; - uint64_t state; - - if ((label = vdev_label_read_config(vd)) == NULL) { - vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - return (-1); - } - - if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || - version > ZFS_VERSION || - nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || - guid != vd->vdev_guid || - nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { - vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); - nvlist_free(label); - return (-1); - } - - spa_spare_add(vd); - - /* - * We don't actually check the pool state here. If it's in fact in - * use by another pool, we update this fact on the fly when requested. - */ - nvlist_free(label); - return (0); -} - -void -vdev_sync_done(vdev_t *vd, uint64_t txg) -{ - metaslab_t *msp; - - dprintf("%s txg %llu\n", vdev_description(vd), txg); - - while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) - metaslab_sync_done(msp, txg); -} - -void -vdev_sync(vdev_t *vd, uint64_t txg) -{ - spa_t *spa = vd->vdev_spa; - vdev_t *lvd; - metaslab_t *msp; - dmu_tx_t *tx; - - dprintf("%s txg %llu pass %d\n", - vdev_description(vd), (u_longlong_t)txg, spa_sync_pass(spa)); - - if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { - ASSERT(vd == vd->vdev_top); - tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); - vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, - DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); - ASSERT(vd->vdev_ms_array != 0); - vdev_config_dirty(vd); - dmu_tx_commit(tx); - } - - while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { - metaslab_sync(msp, txg); - (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); - } - - while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) - vdev_dtl_sync(lvd, txg); - - (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); -} - -uint64_t -vdev_psize_to_asize(vdev_t *vd, uint64_t psize) -{ - return (vd->vdev_ops->vdev_op_asize(vd, psize)); -} - -void -vdev_io_start(zio_t *zio) -{ - zio->io_vd->vdev_ops->vdev_op_io_start(zio); -} - -void -vdev_io_done(zio_t *zio) -{ - zio->io_vd->vdev_ops->vdev_op_io_done(zio); -} - -const char * -vdev_description(vdev_t *vd) -{ - if (vd == NULL || vd->vdev_ops == NULL) - return ("<unknown>"); - - if (vd->vdev_path != NULL) - return (vd->vdev_path); - - if (vd->vdev_parent == NULL) - return (spa_name(vd->vdev_spa)); - - return (vd->vdev_ops->vdev_op_type); -} - -int -vdev_online(spa_t *spa, uint64_t guid) -{ - vdev_t *rvd, *vd; - uint64_t txg; - - txg = spa_vdev_enter(spa); - - rvd = spa->spa_root_vdev; - - if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) - return (spa_vdev_exit(spa, NULL, txg, ENODEV)); - - if (!vd->vdev_ops->vdev_op_leaf) - return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); - - dprintf("ONLINE: %s\n", vdev_description(vd)); - - vd->vdev_offline = B_FALSE; - vd->vdev_tmpoffline = B_FALSE; - vdev_reopen(vd->vdev_top); - - vdev_config_dirty(vd->vdev_top); - - (void) spa_vdev_exit(spa, NULL, txg, 0); - - VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); - - return (0); -} - -int -vdev_offline(spa_t *spa, uint64_t guid, int istmp) -{ - vdev_t *rvd, *vd; - uint64_t txg; - - txg = spa_vdev_enter(spa); - - rvd = spa->spa_root_vdev; - - if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) - return (spa_vdev_exit(spa, NULL, txg, ENODEV)); - - if (!vd->vdev_ops->vdev_op_leaf) - return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); - - dprintf("OFFLINE: %s\n", vdev_description(vd)); - - /* - * If the device isn't already offline, try to offline it. - */ - if (!vd->vdev_offline) { - /* - * If this device's top-level vdev has a non-empty DTL, - * don't allow the device to be offlined. - * - * XXX -- make this more precise by allowing the offline - * as long as the remaining devices don't have any DTL holes. - */ - if (vd->vdev_top->vdev_dtl_map.sm_space != 0) - return (spa_vdev_exit(spa, NULL, txg, EBUSY)); - - /* - * Offline this device and reopen its top-level vdev. - * If this action results in the top-level vdev becoming - * unusable, undo it and fail the request. - */ - vd->vdev_offline = B_TRUE; - vdev_reopen(vd->vdev_top); - if (vdev_is_dead(vd->vdev_top)) { - vd->vdev_offline = B_FALSE; - vdev_reopen(vd->vdev_top); - return (spa_vdev_exit(spa, NULL, txg, EBUSY)); - } - } - - vd->vdev_tmpoffline = istmp; - - vdev_config_dirty(vd->vdev_top); - - return (spa_vdev_exit(spa, NULL, txg, 0)); -} - -/* - * Clear the error counts associated with this vdev. Unlike vdev_online() and - * vdev_offline(), we assume the spa config is locked. We also clear all - * children. If 'vd' is NULL, then the user wants to clear all vdevs. - */ -void -vdev_clear(spa_t *spa, vdev_t *vd) -{ - int c; - - if (vd == NULL) - vd = spa->spa_root_vdev; - - vd->vdev_stat.vs_read_errors = 0; - vd->vdev_stat.vs_write_errors = 0; - vd->vdev_stat.vs_checksum_errors = 0; - - for (c = 0; c < vd->vdev_children; c++) - vdev_clear(spa, vd->vdev_child[c]); -} - -int -vdev_is_dead(vdev_t *vd) -{ - return (vd->vdev_state <= VDEV_STATE_CANT_OPEN); -} - -int -vdev_error_inject(vdev_t *vd, zio_t *zio) -{ - int error = 0; - - if (vd->vdev_fault_mode == VDEV_FAULT_NONE) - return (0); - - if (((1ULL << zio->io_type) & vd->vdev_fault_mask) == 0) - return (0); - - switch (vd->vdev_fault_mode) { - case VDEV_FAULT_RANDOM: - if (spa_get_random(vd->vdev_fault_arg) == 0) - error = EIO; - break; - - case VDEV_FAULT_COUNT: - if ((int64_t)--vd->vdev_fault_arg <= 0) - vd->vdev_fault_mode = VDEV_FAULT_NONE; - error = EIO; - break; - } - - if (error != 0) { - dprintf("returning %d for type %d on %s state %d offset %llx\n", - error, zio->io_type, vdev_description(vd), - vd->vdev_state, zio->io_offset); - } - - return (error); -} - -/* - * Get statistics for the given vdev. - */ -void -vdev_get_stats(vdev_t *vd, vdev_stat_t *vs) -{ - vdev_t *rvd = vd->vdev_spa->spa_root_vdev; - int c, t; - - mutex_enter(&vd->vdev_stat_lock); - bcopy(&vd->vdev_stat, vs, sizeof (*vs)); - vs->vs_timestamp = gethrtime() - vs->vs_timestamp; - vs->vs_state = vd->vdev_state; - vs->vs_rsize = vdev_get_rsize(vd); - mutex_exit(&vd->vdev_stat_lock); - - /* - * If we're getting stats on the root vdev, aggregate the I/O counts - * over all top-level vdevs (i.e. the direct children of the root). - */ - if (vd == rvd) { - for (c = 0; c < rvd->vdev_children; c++) { - vdev_t *cvd = rvd->vdev_child[c]; - vdev_stat_t *cvs = &cvd->vdev_stat; - - mutex_enter(&vd->vdev_stat_lock); - for (t = 0; t < ZIO_TYPES; t++) { - vs->vs_ops[t] += cvs->vs_ops[t]; - vs->vs_bytes[t] += cvs->vs_bytes[t]; - } - vs->vs_read_errors += cvs->vs_read_errors; - vs->vs_write_errors += cvs->vs_write_errors; - vs->vs_checksum_errors += cvs->vs_checksum_errors; - vs->vs_scrub_examined += cvs->vs_scrub_examined; - vs->vs_scrub_errors += cvs->vs_scrub_errors; - mutex_exit(&vd->vdev_stat_lock); - } - } -} - -void -vdev_stat_update(zio_t *zio) -{ - vdev_t *vd = zio->io_vd; - vdev_t *pvd; - uint64_t txg = zio->io_txg; - vdev_stat_t *vs = &vd->vdev_stat; - zio_type_t type = zio->io_type; - int flags = zio->io_flags; - - if (zio->io_error == 0) { - if (!(flags & ZIO_FLAG_IO_BYPASS)) { - mutex_enter(&vd->vdev_stat_lock); - vs->vs_ops[type]++; - vs->vs_bytes[type] += zio->io_size; - mutex_exit(&vd->vdev_stat_lock); - } - if ((flags & ZIO_FLAG_IO_REPAIR) && - zio->io_delegate_list == NULL) { - mutex_enter(&vd->vdev_stat_lock); - if (flags & ZIO_FLAG_SCRUB_THREAD) - vs->vs_scrub_repaired += zio->io_size; - else - vs->vs_self_healed += zio->io_size; - mutex_exit(&vd->vdev_stat_lock); - } - return; - } - - if (flags & ZIO_FLAG_SPECULATIVE) - return; - - if (!vdev_is_dead(vd)) { - mutex_enter(&vd->vdev_stat_lock); - if (type == ZIO_TYPE_READ) { - if (zio->io_error == ECKSUM) - vs->vs_checksum_errors++; - else - vs->vs_read_errors++; - } - if (type == ZIO_TYPE_WRITE) - vs->vs_write_errors++; - mutex_exit(&vd->vdev_stat_lock); - } - - if (type == ZIO_TYPE_WRITE) { - if (txg == 0 || vd->vdev_children != 0) - return; - if (flags & ZIO_FLAG_SCRUB_THREAD) { - ASSERT(flags & ZIO_FLAG_IO_REPAIR); - for (pvd = vd; pvd != NULL; pvd = pvd->vdev_parent) - vdev_dtl_dirty(&pvd->vdev_dtl_scrub, txg, 1); - } - if (!(flags & ZIO_FLAG_IO_REPAIR)) { - if (vdev_dtl_contains(&vd->vdev_dtl_map, txg, 1)) - return; - vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); - for (pvd = vd; pvd != NULL; pvd = pvd->vdev_parent) - vdev_dtl_dirty(&pvd->vdev_dtl_map, txg, 1); - } - } -} - -void -vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, boolean_t complete) -{ - int c; - vdev_stat_t *vs = &vd->vdev_stat; - - for (c = 0; c < vd->vdev_children; c++) - vdev_scrub_stat_update(vd->vdev_child[c], type, complete); - - mutex_enter(&vd->vdev_stat_lock); - - if (type == POOL_SCRUB_NONE) { - /* - * Update completion and end time. Leave everything else alone - * so we can report what happened during the previous scrub. - */ - vs->vs_scrub_complete = complete; - vs->vs_scrub_end = gethrestime_sec(); - } else { - vs->vs_scrub_type = type; - vs->vs_scrub_complete = 0; - vs->vs_scrub_examined = 0; - vs->vs_scrub_repaired = 0; - vs->vs_scrub_errors = 0; - vs->vs_scrub_start = gethrestime_sec(); - vs->vs_scrub_end = 0; - } - - mutex_exit(&vd->vdev_stat_lock); -} - -/* - * Update the in-core space usage stats for this vdev and the root vdev. - */ -void -vdev_space_update(vdev_t *vd, int64_t space_delta, int64_t alloc_delta) -{ - ASSERT(vd == vd->vdev_top); - int64_t dspace_delta = space_delta; - - do { - if (vd->vdev_ms_count) { - /* - * If this is a top-level vdev, apply the - * inverse of its psize-to-asize (ie. RAID-Z) - * space-expansion factor. We must calculate - * this here and not at the root vdev because - * the root vdev's psize-to-asize is simply the - * max of its childrens', thus not accurate - * enough for us. - */ - ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); - dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * - vd->vdev_deflate_ratio; - } - - mutex_enter(&vd->vdev_stat_lock); - vd->vdev_stat.vs_space += space_delta; - vd->vdev_stat.vs_alloc += alloc_delta; - vd->vdev_stat.vs_dspace += dspace_delta; - mutex_exit(&vd->vdev_stat_lock); - } while ((vd = vd->vdev_parent) != NULL); -} - -/* - * Mark a top-level vdev's config as dirty, placing it on the dirty list - * so that it will be written out next time the vdev configuration is synced. - * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. - */ -void -vdev_config_dirty(vdev_t *vd) -{ - spa_t *spa = vd->vdev_spa; - vdev_t *rvd = spa->spa_root_vdev; - int c; - - /* - * The dirty list is protected by the config lock. The caller must - * either hold the config lock as writer, or must be the sync thread - * (which holds the lock as reader). There's only one sync thread, - * so this is sufficient to ensure mutual exclusion. - */ - ASSERT(spa_config_held(spa, RW_WRITER) || - dsl_pool_sync_context(spa_get_dsl(spa))); - - if (vd == rvd) { - for (c = 0; c < rvd->vdev_children; c++) - vdev_config_dirty(rvd->vdev_child[c]); - } else { - ASSERT(vd == vd->vdev_top); - - if (!list_link_active(&vd->vdev_dirty_node)) - list_insert_head(&spa->spa_dirty_list, vd); - } -} - -void -vdev_config_clean(vdev_t *vd) -{ - spa_t *spa = vd->vdev_spa; - - ASSERT(spa_config_held(spa, RW_WRITER) || - dsl_pool_sync_context(spa_get_dsl(spa))); - - ASSERT(list_link_active(&vd->vdev_dirty_node)); - list_remove(&spa->spa_dirty_list, vd); -} - -void -vdev_propagate_state(vdev_t *vd) -{ - vdev_t *rvd = vd->vdev_spa->spa_root_vdev; - int degraded = 0, faulted = 0; - int corrupted = 0; - int c; - vdev_t *child; - - for (c = 0; c < vd->vdev_children; c++) { - child = vd->vdev_child[c]; - if (child->vdev_state <= VDEV_STATE_CANT_OPEN) - faulted++; - else if (child->vdev_state == VDEV_STATE_DEGRADED) - degraded++; - - if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) - corrupted++; - } - - vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); - - /* - * Root special: if there is a toplevel vdev that cannot be - * opened due to corrupted metadata, then propagate the root - * vdev's aux state as 'corrupt' rather than 'insufficient - * replicas'. - */ - if (corrupted && vd == rvd && rvd->vdev_state == VDEV_STATE_CANT_OPEN) - vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, - VDEV_AUX_CORRUPT_DATA); -} - -/* - * Set a vdev's state. If this is during an open, we don't update the parent - * state, because we're in the process of opening children depth-first. - * Otherwise, we propagate the change to the parent. - * - * If this routine places a device in a faulted state, an appropriate ereport is - * generated. - */ -void -vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) -{ - uint64_t save_state; - - if (state == vd->vdev_state) { - vd->vdev_stat.vs_aux = aux; - return; - } - - save_state = vd->vdev_state; - - vd->vdev_state = state; - vd->vdev_stat.vs_aux = aux; - - /* - * If we are setting the vdev state to anything but an open state, then - * always close the underlying device. Otherwise, we keep accessible - * but invalid devices open forever. We don't call vdev_close() itself, - * because that implies some extra checks (offline, etc) that we don't - * want here. This is limited to leaf devices, because otherwise - * closing the device will affect other children. - */ - if (vdev_is_dead(vd) && vd->vdev_ops->vdev_op_leaf) - vd->vdev_ops->vdev_op_close(vd); - - if (state == VDEV_STATE_CANT_OPEN) { - /* - * If we fail to open a vdev during an import, we mark it as - * "not available", which signifies that it was never there to - * begin with. Failure to open such a device is not considered - * an error. - */ - if (vd->vdev_spa->spa_load_state == SPA_LOAD_IMPORT && - vd->vdev_ops->vdev_op_leaf) - vd->vdev_not_present = 1; - - /* - * Post the appropriate ereport. If the 'prevstate' field is - * set to something other than VDEV_STATE_UNKNOWN, it indicates - * that this is part of a vdev_reopen(). In this case, we don't - * want to post the ereport if the device was already in the - * CANT_OPEN state beforehand. - */ - if (vd->vdev_prevstate != state && !vd->vdev_not_present && - vd != vd->vdev_spa->spa_root_vdev) { - const char *class; - - switch (aux) { - case VDEV_AUX_OPEN_FAILED: - class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; - break; - case VDEV_AUX_CORRUPT_DATA: - class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; - break; - case VDEV_AUX_NO_REPLICAS: - class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; - break; - case VDEV_AUX_BAD_GUID_SUM: - class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; - break; - case VDEV_AUX_TOO_SMALL: - class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; - break; - case VDEV_AUX_BAD_LABEL: - class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; - break; - default: - class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; - } - - zfs_ereport_post(class, vd->vdev_spa, - vd, NULL, save_state, 0); - } - } - - if (isopen) - return; - - if (vd->vdev_parent != NULL) - vdev_propagate_state(vd->vdev_parent); -} |
