| /* |
| * 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 2015 Nexenta Systems, Inc. All rights reserved. |
| * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2012, 2018 by Delphix. All rights reserved. |
| * Copyright 2015 RackTop Systems. |
| * Copyright (c) 2016, Intel Corporation. |
| * Copyright (c) 2021, Colm Buckley <colm@tuatha.org> |
| */ |
| |
| /* |
| * Pool import support functions. |
| * |
| * Used by zpool, ztest, zdb, and zhack to locate importable configs. Since |
| * these commands are expected to run in the global zone, we can assume |
| * that the devices are all readable when called. |
| * |
| * To import a pool, we rely on reading the configuration information from the |
| * ZFS label of each device. If we successfully read the label, then we |
| * organize the configuration information in the following hierarchy: |
| * |
| * pool guid -> toplevel vdev guid -> label txg |
| * |
| * Duplicate entries matching this same tuple will be discarded. Once we have |
| * examined every device, we pick the best label txg config for each toplevel |
| * vdev. We then arrange these toplevel vdevs into a complete pool config, and |
| * update any paths that have changed. Finally, we attempt to import the pool |
| * using our derived config, and record the results. |
| */ |
| |
| #include <aio.h> |
| #include <ctype.h> |
| #include <dirent.h> |
| #include <errno.h> |
| #include <libintl.h> |
| #include <libgen.h> |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <sys/dktp/fdisk.h> |
| #include <sys/vdev_impl.h> |
| #include <sys/fs/zfs.h> |
| |
| #include <thread_pool.h> |
| #include <libzutil.h> |
| #include <libnvpair.h> |
| |
| #include "zutil_import.h" |
| |
| /*PRINTFLIKE2*/ |
| static void |
| zutil_error_aux(libpc_handle_t *hdl, const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| |
| (void) vsnprintf(hdl->lpc_desc, sizeof (hdl->lpc_desc), fmt, ap); |
| hdl->lpc_desc_active = B_TRUE; |
| |
| va_end(ap); |
| } |
| |
| static void |
| zutil_verror(libpc_handle_t *hdl, const char *error, const char *fmt, |
| va_list ap) |
| { |
| char action[1024]; |
| |
| (void) vsnprintf(action, sizeof (action), fmt, ap); |
| |
| if (hdl->lpc_desc_active) |
| hdl->lpc_desc_active = B_FALSE; |
| else |
| hdl->lpc_desc[0] = '\0'; |
| |
| if (hdl->lpc_printerr) { |
| if (hdl->lpc_desc[0] != '\0') |
| error = hdl->lpc_desc; |
| |
| (void) fprintf(stderr, "%s: %s\n", action, error); |
| } |
| } |
| |
| /*PRINTFLIKE3*/ |
| static int |
| zutil_error_fmt(libpc_handle_t *hdl, const char *error, const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| |
| zutil_verror(hdl, error, fmt, ap); |
| |
| va_end(ap); |
| |
| return (-1); |
| } |
| |
| static int |
| zutil_error(libpc_handle_t *hdl, const char *error, const char *msg) |
| { |
| return (zutil_error_fmt(hdl, error, "%s", msg)); |
| } |
| |
| static int |
| zutil_no_memory(libpc_handle_t *hdl) |
| { |
| zutil_error(hdl, EZFS_NOMEM, "internal error"); |
| exit(1); |
| } |
| |
| void * |
| zutil_alloc(libpc_handle_t *hdl, size_t size) |
| { |
| void *data; |
| |
| if ((data = calloc(1, size)) == NULL) |
| (void) zutil_no_memory(hdl); |
| |
| return (data); |
| } |
| |
| char * |
| zutil_strdup(libpc_handle_t *hdl, const char *str) |
| { |
| char *ret; |
| |
| if ((ret = strdup(str)) == NULL) |
| (void) zutil_no_memory(hdl); |
| |
| return (ret); |
| } |
| |
| /* |
| * Intermediate structures used to gather configuration information. |
| */ |
| typedef struct config_entry { |
| uint64_t ce_txg; |
| nvlist_t *ce_config; |
| struct config_entry *ce_next; |
| } config_entry_t; |
| |
| typedef struct vdev_entry { |
| uint64_t ve_guid; |
| config_entry_t *ve_configs; |
| struct vdev_entry *ve_next; |
| } vdev_entry_t; |
| |
| typedef struct pool_entry { |
| uint64_t pe_guid; |
| vdev_entry_t *pe_vdevs; |
| struct pool_entry *pe_next; |
| } pool_entry_t; |
| |
| typedef struct name_entry { |
| char *ne_name; |
| uint64_t ne_guid; |
| uint64_t ne_order; |
| uint64_t ne_num_labels; |
| struct name_entry *ne_next; |
| } name_entry_t; |
| |
| typedef struct pool_list { |
| pool_entry_t *pools; |
| name_entry_t *names; |
| } pool_list_t; |
| |
| /* |
| * Go through and fix up any path and/or devid information for the given vdev |
| * configuration. |
| */ |
| static int |
| fix_paths(libpc_handle_t *hdl, nvlist_t *nv, name_entry_t *names) |
| { |
| nvlist_t **child; |
| uint_t c, children; |
| uint64_t guid; |
| name_entry_t *ne, *best; |
| char *path; |
| |
| if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, |
| &child, &children) == 0) { |
| for (c = 0; c < children; c++) |
| if (fix_paths(hdl, child[c], names) != 0) |
| return (-1); |
| return (0); |
| } |
| |
| /* |
| * This is a leaf (file or disk) vdev. In either case, go through |
| * the name list and see if we find a matching guid. If so, replace |
| * the path and see if we can calculate a new devid. |
| * |
| * There may be multiple names associated with a particular guid, in |
| * which case we have overlapping partitions or multiple paths to the |
| * same disk. In this case we prefer to use the path name which |
| * matches the ZPOOL_CONFIG_PATH. If no matching entry is found we |
| * use the lowest order device which corresponds to the first match |
| * while traversing the ZPOOL_IMPORT_PATH search path. |
| */ |
| verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) == 0); |
| if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) != 0) |
| path = NULL; |
| |
| best = NULL; |
| for (ne = names; ne != NULL; ne = ne->ne_next) { |
| if (ne->ne_guid == guid) { |
| if (path == NULL) { |
| best = ne; |
| break; |
| } |
| |
| if ((strlen(path) == strlen(ne->ne_name)) && |
| strncmp(path, ne->ne_name, strlen(path)) == 0) { |
| best = ne; |
| break; |
| } |
| |
| if (best == NULL) { |
| best = ne; |
| continue; |
| } |
| |
| /* Prefer paths with move vdev labels. */ |
| if (ne->ne_num_labels > best->ne_num_labels) { |
| best = ne; |
| continue; |
| } |
| |
| /* Prefer paths earlier in the search order. */ |
| if (ne->ne_num_labels == best->ne_num_labels && |
| ne->ne_order < best->ne_order) { |
| best = ne; |
| continue; |
| } |
| } |
| } |
| |
| if (best == NULL) |
| return (0); |
| |
| if (nvlist_add_string(nv, ZPOOL_CONFIG_PATH, best->ne_name) != 0) |
| return (-1); |
| |
| update_vdev_config_dev_strs(nv); |
| |
| return (0); |
| } |
| |
| /* |
| * Add the given configuration to the list of known devices. |
| */ |
| static int |
| add_config(libpc_handle_t *hdl, pool_list_t *pl, const char *path, |
| int order, int num_labels, nvlist_t *config) |
| { |
| uint64_t pool_guid, vdev_guid, top_guid, txg, state; |
| pool_entry_t *pe; |
| vdev_entry_t *ve; |
| config_entry_t *ce; |
| name_entry_t *ne; |
| |
| /* |
| * If this is a hot spare not currently in use or level 2 cache |
| * device, add it to the list of names to translate, but don't do |
| * anything else. |
| */ |
| if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, |
| &state) == 0 && |
| (state == POOL_STATE_SPARE || state == POOL_STATE_L2CACHE) && |
| nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, &vdev_guid) == 0) { |
| if ((ne = zutil_alloc(hdl, sizeof (name_entry_t))) == NULL) |
| return (-1); |
| |
| if ((ne->ne_name = zutil_strdup(hdl, path)) == NULL) { |
| free(ne); |
| return (-1); |
| } |
| ne->ne_guid = vdev_guid; |
| ne->ne_order = order; |
| ne->ne_num_labels = num_labels; |
| ne->ne_next = pl->names; |
| pl->names = ne; |
| |
| return (0); |
| } |
| |
| /* |
| * If we have a valid config but cannot read any of these fields, then |
| * it means we have a half-initialized label. In vdev_label_init() |
| * we write a label with txg == 0 so that we can identify the device |
| * in case the user refers to the same disk later on. If we fail to |
| * create the pool, we'll be left with a label in this state |
| * which should not be considered part of a valid pool. |
| */ |
| if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, |
| &pool_guid) != 0 || |
| nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, |
| &vdev_guid) != 0 || |
| nvlist_lookup_uint64(config, ZPOOL_CONFIG_TOP_GUID, |
| &top_guid) != 0 || |
| nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, |
| &txg) != 0 || txg == 0) { |
| return (0); |
| } |
| |
| /* |
| * First, see if we know about this pool. If not, then add it to the |
| * list of known pools. |
| */ |
| for (pe = pl->pools; pe != NULL; pe = pe->pe_next) { |
| if (pe->pe_guid == pool_guid) |
| break; |
| } |
| |
| if (pe == NULL) { |
| if ((pe = zutil_alloc(hdl, sizeof (pool_entry_t))) == NULL) { |
| return (-1); |
| } |
| pe->pe_guid = pool_guid; |
| pe->pe_next = pl->pools; |
| pl->pools = pe; |
| } |
| |
| /* |
| * Second, see if we know about this toplevel vdev. Add it if its |
| * missing. |
| */ |
| for (ve = pe->pe_vdevs; ve != NULL; ve = ve->ve_next) { |
| if (ve->ve_guid == top_guid) |
| break; |
| } |
| |
| if (ve == NULL) { |
| if ((ve = zutil_alloc(hdl, sizeof (vdev_entry_t))) == NULL) { |
| return (-1); |
| } |
| ve->ve_guid = top_guid; |
| ve->ve_next = pe->pe_vdevs; |
| pe->pe_vdevs = ve; |
| } |
| |
| /* |
| * Third, see if we have a config with a matching transaction group. If |
| * so, then we do nothing. Otherwise, add it to the list of known |
| * configs. |
| */ |
| for (ce = ve->ve_configs; ce != NULL; ce = ce->ce_next) { |
| if (ce->ce_txg == txg) |
| break; |
| } |
| |
| if (ce == NULL) { |
| if ((ce = zutil_alloc(hdl, sizeof (config_entry_t))) == NULL) { |
| return (-1); |
| } |
| ce->ce_txg = txg; |
| ce->ce_config = fnvlist_dup(config); |
| ce->ce_next = ve->ve_configs; |
| ve->ve_configs = ce; |
| } |
| |
| /* |
| * At this point we've successfully added our config to the list of |
| * known configs. The last thing to do is add the vdev guid -> path |
| * mappings so that we can fix up the configuration as necessary before |
| * doing the import. |
| */ |
| if ((ne = zutil_alloc(hdl, sizeof (name_entry_t))) == NULL) |
| return (-1); |
| |
| if ((ne->ne_name = zutil_strdup(hdl, path)) == NULL) { |
| free(ne); |
| return (-1); |
| } |
| |
| ne->ne_guid = vdev_guid; |
| ne->ne_order = order; |
| ne->ne_num_labels = num_labels; |
| ne->ne_next = pl->names; |
| pl->names = ne; |
| |
| return (0); |
| } |
| |
| static int |
| zutil_pool_active(libpc_handle_t *hdl, const char *name, uint64_t guid, |
| boolean_t *isactive) |
| { |
| ASSERT(hdl->lpc_ops->pco_pool_active != NULL); |
| |
| int error = hdl->lpc_ops->pco_pool_active(hdl->lpc_lib_handle, name, |
| guid, isactive); |
| |
| return (error); |
| } |
| |
| static nvlist_t * |
| zutil_refresh_config(libpc_handle_t *hdl, nvlist_t *tryconfig) |
| { |
| ASSERT(hdl->lpc_ops->pco_refresh_config != NULL); |
| |
| return (hdl->lpc_ops->pco_refresh_config(hdl->lpc_lib_handle, |
| tryconfig)); |
| } |
| |
| /* |
| * Determine if the vdev id is a hole in the namespace. |
| */ |
| static boolean_t |
| vdev_is_hole(uint64_t *hole_array, uint_t holes, uint_t id) |
| { |
| int c; |
| |
| for (c = 0; c < holes; c++) { |
| |
| /* Top-level is a hole */ |
| if (hole_array[c] == id) |
| return (B_TRUE); |
| } |
| return (B_FALSE); |
| } |
| |
| /* |
| * Convert our list of pools into the definitive set of configurations. We |
| * start by picking the best config for each toplevel vdev. Once that's done, |
| * we assemble the toplevel vdevs into a full config for the pool. We make a |
| * pass to fix up any incorrect paths, and then add it to the main list to |
| * return to the user. |
| */ |
| static nvlist_t * |
| get_configs(libpc_handle_t *hdl, pool_list_t *pl, boolean_t active_ok, |
| nvlist_t *policy) |
| { |
| pool_entry_t *pe; |
| vdev_entry_t *ve; |
| config_entry_t *ce; |
| nvlist_t *ret = NULL, *config = NULL, *tmp = NULL, *nvtop, *nvroot; |
| nvlist_t **spares, **l2cache; |
| uint_t i, nspares, nl2cache; |
| boolean_t config_seen; |
| uint64_t best_txg; |
| char *name, *hostname = NULL; |
| uint64_t guid; |
| uint_t children = 0; |
| nvlist_t **child = NULL; |
| uint64_t *hole_array, max_id; |
| uint_t c; |
| boolean_t isactive; |
| nvlist_t *nvl; |
| boolean_t valid_top_config = B_FALSE; |
| |
| if (nvlist_alloc(&ret, 0, 0) != 0) |
| goto nomem; |
| |
| for (pe = pl->pools; pe != NULL; pe = pe->pe_next) { |
| uint64_t id, max_txg = 0, hostid = 0; |
| uint_t holes = 0; |
| |
| if (nvlist_alloc(&config, NV_UNIQUE_NAME, 0) != 0) |
| goto nomem; |
| config_seen = B_FALSE; |
| |
| /* |
| * Iterate over all toplevel vdevs. Grab the pool configuration |
| * from the first one we find, and then go through the rest and |
| * add them as necessary to the 'vdevs' member of the config. |
| */ |
| for (ve = pe->pe_vdevs; ve != NULL; ve = ve->ve_next) { |
| |
| /* |
| * Determine the best configuration for this vdev by |
| * selecting the config with the latest transaction |
| * group. |
| */ |
| best_txg = 0; |
| for (ce = ve->ve_configs; ce != NULL; |
| ce = ce->ce_next) { |
| |
| if (ce->ce_txg > best_txg) { |
| tmp = ce->ce_config; |
| best_txg = ce->ce_txg; |
| } |
| } |
| |
| /* |
| * We rely on the fact that the max txg for the |
| * pool will contain the most up-to-date information |
| * about the valid top-levels in the vdev namespace. |
| */ |
| if (best_txg > max_txg) { |
| (void) nvlist_remove(config, |
| ZPOOL_CONFIG_VDEV_CHILDREN, |
| DATA_TYPE_UINT64); |
| (void) nvlist_remove(config, |
| ZPOOL_CONFIG_HOLE_ARRAY, |
| DATA_TYPE_UINT64_ARRAY); |
| |
| max_txg = best_txg; |
| hole_array = NULL; |
| holes = 0; |
| max_id = 0; |
| valid_top_config = B_FALSE; |
| |
| if (nvlist_lookup_uint64(tmp, |
| ZPOOL_CONFIG_VDEV_CHILDREN, &max_id) == 0) { |
| verify(nvlist_add_uint64(config, |
| ZPOOL_CONFIG_VDEV_CHILDREN, |
| max_id) == 0); |
| valid_top_config = B_TRUE; |
| } |
| |
| if (nvlist_lookup_uint64_array(tmp, |
| ZPOOL_CONFIG_HOLE_ARRAY, &hole_array, |
| &holes) == 0) { |
| verify(nvlist_add_uint64_array(config, |
| ZPOOL_CONFIG_HOLE_ARRAY, |
| hole_array, holes) == 0); |
| } |
| } |
| |
| if (!config_seen) { |
| /* |
| * Copy the relevant pieces of data to the pool |
| * configuration: |
| * |
| * version |
| * pool guid |
| * name |
| * comment (if available) |
| * compatibility features (if available) |
| * pool state |
| * hostid (if available) |
| * hostname (if available) |
| */ |
| uint64_t state, version; |
| char *comment = NULL; |
| char *compatibility = NULL; |
| |
| version = fnvlist_lookup_uint64(tmp, |
| ZPOOL_CONFIG_VERSION); |
| fnvlist_add_uint64(config, |
| ZPOOL_CONFIG_VERSION, version); |
| guid = fnvlist_lookup_uint64(tmp, |
| ZPOOL_CONFIG_POOL_GUID); |
| fnvlist_add_uint64(config, |
| ZPOOL_CONFIG_POOL_GUID, guid); |
| name = fnvlist_lookup_string(tmp, |
| ZPOOL_CONFIG_POOL_NAME); |
| fnvlist_add_string(config, |
| ZPOOL_CONFIG_POOL_NAME, name); |
| |
| if (nvlist_lookup_string(tmp, |
| ZPOOL_CONFIG_COMMENT, &comment) == 0) |
| fnvlist_add_string(config, |
| ZPOOL_CONFIG_COMMENT, comment); |
| |
| if (nvlist_lookup_string(tmp, |
| ZPOOL_CONFIG_COMPATIBILITY, |
| &compatibility) == 0) |
| fnvlist_add_string(config, |
| ZPOOL_CONFIG_COMPATIBILITY, |
| compatibility); |
| |
| state = fnvlist_lookup_uint64(tmp, |
| ZPOOL_CONFIG_POOL_STATE); |
| fnvlist_add_uint64(config, |
| ZPOOL_CONFIG_POOL_STATE, state); |
| |
| hostid = 0; |
| if (nvlist_lookup_uint64(tmp, |
| ZPOOL_CONFIG_HOSTID, &hostid) == 0) { |
| fnvlist_add_uint64(config, |
| ZPOOL_CONFIG_HOSTID, hostid); |
| hostname = fnvlist_lookup_string(tmp, |
| ZPOOL_CONFIG_HOSTNAME); |
| fnvlist_add_string(config, |
| ZPOOL_CONFIG_HOSTNAME, hostname); |
| } |
| |
| config_seen = B_TRUE; |
| } |
| |
| /* |
| * Add this top-level vdev to the child array. |
| */ |
| verify(nvlist_lookup_nvlist(tmp, |
| ZPOOL_CONFIG_VDEV_TREE, &nvtop) == 0); |
| verify(nvlist_lookup_uint64(nvtop, ZPOOL_CONFIG_ID, |
| &id) == 0); |
| |
| if (id >= children) { |
| nvlist_t **newchild; |
| |
| newchild = zutil_alloc(hdl, (id + 1) * |
| sizeof (nvlist_t *)); |
| if (newchild == NULL) |
| goto nomem; |
| |
| for (c = 0; c < children; c++) |
| newchild[c] = child[c]; |
| |
| free(child); |
| child = newchild; |
| children = id + 1; |
| } |
| if (nvlist_dup(nvtop, &child[id], 0) != 0) |
| goto nomem; |
| |
| } |
| |
| /* |
| * If we have information about all the top-levels then |
| * clean up the nvlist which we've constructed. This |
| * means removing any extraneous devices that are |
| * beyond the valid range or adding devices to the end |
| * of our array which appear to be missing. |
| */ |
| if (valid_top_config) { |
| if (max_id < children) { |
| for (c = max_id; c < children; c++) |
| nvlist_free(child[c]); |
| children = max_id; |
| } else if (max_id > children) { |
| nvlist_t **newchild; |
| |
| newchild = zutil_alloc(hdl, (max_id) * |
| sizeof (nvlist_t *)); |
| if (newchild == NULL) |
| goto nomem; |
| |
| for (c = 0; c < children; c++) |
| newchild[c] = child[c]; |
| |
| free(child); |
| child = newchild; |
| children = max_id; |
| } |
| } |
| |
| verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, |
| &guid) == 0); |
| |
| /* |
| * The vdev namespace may contain holes as a result of |
| * device removal. We must add them back into the vdev |
| * tree before we process any missing devices. |
| */ |
| if (holes > 0) { |
| ASSERT(valid_top_config); |
| |
| for (c = 0; c < children; c++) { |
| nvlist_t *holey; |
| |
| if (child[c] != NULL || |
| !vdev_is_hole(hole_array, holes, c)) |
| continue; |
| |
| if (nvlist_alloc(&holey, NV_UNIQUE_NAME, |
| 0) != 0) |
| goto nomem; |
| |
| /* |
| * Holes in the namespace are treated as |
| * "hole" top-level vdevs and have a |
| * special flag set on them. |
| */ |
| if (nvlist_add_string(holey, |
| ZPOOL_CONFIG_TYPE, |
| VDEV_TYPE_HOLE) != 0 || |
| nvlist_add_uint64(holey, |
| ZPOOL_CONFIG_ID, c) != 0 || |
| nvlist_add_uint64(holey, |
| ZPOOL_CONFIG_GUID, 0ULL) != 0) { |
| nvlist_free(holey); |
| goto nomem; |
| } |
| child[c] = holey; |
| } |
| } |
| |
| /* |
| * Look for any missing top-level vdevs. If this is the case, |
| * create a faked up 'missing' vdev as a placeholder. We cannot |
| * simply compress the child array, because the kernel performs |
| * certain checks to make sure the vdev IDs match their location |
| * in the configuration. |
| */ |
| for (c = 0; c < children; c++) { |
| if (child[c] == NULL) { |
| nvlist_t *missing; |
| if (nvlist_alloc(&missing, NV_UNIQUE_NAME, |
| 0) != 0) |
| goto nomem; |
| if (nvlist_add_string(missing, |
| ZPOOL_CONFIG_TYPE, |
| VDEV_TYPE_MISSING) != 0 || |
| nvlist_add_uint64(missing, |
| ZPOOL_CONFIG_ID, c) != 0 || |
| nvlist_add_uint64(missing, |
| ZPOOL_CONFIG_GUID, 0ULL) != 0) { |
| nvlist_free(missing); |
| goto nomem; |
| } |
| child[c] = missing; |
| } |
| } |
| |
| /* |
| * Put all of this pool's top-level vdevs into a root vdev. |
| */ |
| if (nvlist_alloc(&nvroot, NV_UNIQUE_NAME, 0) != 0) |
| goto nomem; |
| if (nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, |
| VDEV_TYPE_ROOT) != 0 || |
| nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) != 0 || |
| nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, guid) != 0 || |
| nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, |
| child, children) != 0) { |
| nvlist_free(nvroot); |
| goto nomem; |
| } |
| |
| for (c = 0; c < children; c++) |
| nvlist_free(child[c]); |
| free(child); |
| children = 0; |
| child = NULL; |
| |
| /* |
| * Go through and fix up any paths and/or devids based on our |
| * known list of vdev GUID -> path mappings. |
| */ |
| if (fix_paths(hdl, nvroot, pl->names) != 0) { |
| nvlist_free(nvroot); |
| goto nomem; |
| } |
| |
| /* |
| * Add the root vdev to this pool's configuration. |
| */ |
| if (nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, |
| nvroot) != 0) { |
| nvlist_free(nvroot); |
| goto nomem; |
| } |
| nvlist_free(nvroot); |
| |
| /* |
| * zdb uses this path to report on active pools that were |
| * imported or created using -R. |
| */ |
| if (active_ok) |
| goto add_pool; |
| |
| /* |
| * Determine if this pool is currently active, in which case we |
| * can't actually import it. |
| */ |
| verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, |
| &name) == 0); |
| verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, |
| &guid) == 0); |
| |
| if (zutil_pool_active(hdl, name, guid, &isactive) != 0) |
| goto error; |
| |
| if (isactive) { |
| nvlist_free(config); |
| config = NULL; |
| continue; |
| } |
| |
| if (policy != NULL) { |
| if (nvlist_add_nvlist(config, ZPOOL_LOAD_POLICY, |
| policy) != 0) |
| goto nomem; |
| } |
| |
| if ((nvl = zutil_refresh_config(hdl, config)) == NULL) { |
| nvlist_free(config); |
| config = NULL; |
| continue; |
| } |
| |
| nvlist_free(config); |
| config = nvl; |
| |
| /* |
| * Go through and update the paths for spares, now that we have |
| * them. |
| */ |
| verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, |
| &nvroot) == 0); |
| if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, |
| &spares, &nspares) == 0) { |
| for (i = 0; i < nspares; i++) { |
| if (fix_paths(hdl, spares[i], pl->names) != 0) |
| goto nomem; |
| } |
| } |
| |
| /* |
| * Update the paths for l2cache devices. |
| */ |
| if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, |
| &l2cache, &nl2cache) == 0) { |
| for (i = 0; i < nl2cache; i++) { |
| if (fix_paths(hdl, l2cache[i], pl->names) != 0) |
| goto nomem; |
| } |
| } |
| |
| /* |
| * Restore the original information read from the actual label. |
| */ |
| (void) nvlist_remove(config, ZPOOL_CONFIG_HOSTID, |
| DATA_TYPE_UINT64); |
| (void) nvlist_remove(config, ZPOOL_CONFIG_HOSTNAME, |
| DATA_TYPE_STRING); |
| if (hostid != 0) { |
| verify(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID, |
| hostid) == 0); |
| verify(nvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME, |
| hostname) == 0); |
| } |
| |
| add_pool: |
| /* |
| * Add this pool to the list of configs. |
| */ |
| verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, |
| &name) == 0); |
| |
| if (nvlist_add_nvlist(ret, name, config) != 0) |
| goto nomem; |
| |
| nvlist_free(config); |
| config = NULL; |
| } |
| |
| return (ret); |
| |
| nomem: |
| (void) zutil_no_memory(hdl); |
| error: |
| nvlist_free(config); |
| nvlist_free(ret); |
| for (c = 0; c < children; c++) |
| nvlist_free(child[c]); |
| free(child); |
| |
| return (NULL); |
| } |
| |
| /* |
| * Return the offset of the given label. |
| */ |
| static uint64_t |
| label_offset(uint64_t size, int l) |
| { |
| ASSERT(P2PHASE_TYPED(size, sizeof (vdev_label_t), uint64_t) == 0); |
| return (l * sizeof (vdev_label_t) + (l < VDEV_LABELS / 2 ? |
| 0 : size - VDEV_LABELS * sizeof (vdev_label_t))); |
| } |
| |
| /* |
| * The same description applies as to zpool_read_label below, |
| * except here we do it without aio, presumably because an aio call |
| * errored out in a way we think not using it could circumvent. |
| */ |
| static int |
| zpool_read_label_slow(int fd, nvlist_t **config, int *num_labels) |
| { |
| struct stat64 statbuf; |
| int l, count = 0; |
| vdev_phys_t *label; |
| nvlist_t *expected_config = NULL; |
| uint64_t expected_guid = 0, size; |
| int error; |
| |
| *config = NULL; |
| |
| if (fstat64_blk(fd, &statbuf) == -1) |
| return (0); |
| size = P2ALIGN_TYPED(statbuf.st_size, sizeof (vdev_label_t), uint64_t); |
| |
| error = posix_memalign((void **)&label, PAGESIZE, sizeof (*label)); |
| if (error) |
| return (-1); |
| |
| for (l = 0; l < VDEV_LABELS; l++) { |
| uint64_t state, guid, txg; |
| off_t offset = label_offset(size, l) + VDEV_SKIP_SIZE; |
| |
| if (pread64(fd, label, sizeof (vdev_phys_t), |
| offset) != sizeof (vdev_phys_t)) |
| continue; |
| |
| if (nvlist_unpack(label->vp_nvlist, |
| sizeof (label->vp_nvlist), config, 0) != 0) |
| continue; |
| |
| if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_GUID, |
| &guid) != 0 || guid == 0) { |
| nvlist_free(*config); |
| continue; |
| } |
| |
| if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE, |
| &state) != 0 || state > POOL_STATE_L2CACHE) { |
| nvlist_free(*config); |
| continue; |
| } |
| |
| if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE && |
| (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG, |
| &txg) != 0 || txg == 0)) { |
| nvlist_free(*config); |
| continue; |
| } |
| |
| if (expected_guid) { |
| if (expected_guid == guid) |
| count++; |
| |
| nvlist_free(*config); |
| } else { |
| expected_config = *config; |
| expected_guid = guid; |
| count++; |
| } |
| } |
| |
| if (num_labels != NULL) |
| *num_labels = count; |
| |
| free(label); |
| *config = expected_config; |
| |
| return (0); |
| } |
| |
| /* |
| * Given a file descriptor, read the label information and return an nvlist |
| * describing the configuration, if there is one. The number of valid |
| * labels found will be returned in num_labels when non-NULL. |
| */ |
| int |
| zpool_read_label(int fd, nvlist_t **config, int *num_labels) |
| { |
| struct stat64 statbuf; |
| struct aiocb aiocbs[VDEV_LABELS]; |
| struct aiocb *aiocbps[VDEV_LABELS]; |
| vdev_phys_t *labels; |
| nvlist_t *expected_config = NULL; |
| uint64_t expected_guid = 0, size; |
| int error, l, count = 0; |
| |
| *config = NULL; |
| |
| if (fstat64_blk(fd, &statbuf) == -1) |
| return (0); |
| size = P2ALIGN_TYPED(statbuf.st_size, sizeof (vdev_label_t), uint64_t); |
| |
| error = posix_memalign((void **)&labels, PAGESIZE, |
| VDEV_LABELS * sizeof (*labels)); |
| if (error) |
| return (-1); |
| |
| memset(aiocbs, 0, sizeof (aiocbs)); |
| for (l = 0; l < VDEV_LABELS; l++) { |
| off_t offset = label_offset(size, l) + VDEV_SKIP_SIZE; |
| |
| aiocbs[l].aio_fildes = fd; |
| aiocbs[l].aio_offset = offset; |
| aiocbs[l].aio_buf = &labels[l]; |
| aiocbs[l].aio_nbytes = sizeof (vdev_phys_t); |
| aiocbs[l].aio_lio_opcode = LIO_READ; |
| aiocbps[l] = &aiocbs[l]; |
| } |
| |
| if (lio_listio(LIO_WAIT, aiocbps, VDEV_LABELS, NULL) != 0) { |
| int saved_errno = errno; |
| boolean_t do_slow = B_FALSE; |
| error = -1; |
| |
| if (errno == EAGAIN || errno == EINTR || errno == EIO) { |
| /* |
| * A portion of the requests may have been submitted. |
| * Clean them up. |
| */ |
| for (l = 0; l < VDEV_LABELS; l++) { |
| errno = 0; |
| switch (aio_error(&aiocbs[l])) { |
| case EINVAL: |
| break; |
| case EINPROGRESS: |
| // This shouldn't be possible to |
| // encounter, die if we do. |
| ASSERT(B_FALSE); |
| fallthrough; |
| case EOPNOTSUPP: |
| case ENOSYS: |
| do_slow = B_TRUE; |
| fallthrough; |
| case 0: |
| default: |
| (void) aio_return(&aiocbs[l]); |
| } |
| } |
| } |
| if (do_slow) { |
| /* |
| * At least some IO involved access unsafe-for-AIO |
| * files. Let's try again, without AIO this time. |
| */ |
| error = zpool_read_label_slow(fd, config, num_labels); |
| saved_errno = errno; |
| } |
| free(labels); |
| errno = saved_errno; |
| return (error); |
| } |
| |
| for (l = 0; l < VDEV_LABELS; l++) { |
| uint64_t state, guid, txg; |
| |
| if (aio_return(&aiocbs[l]) != sizeof (vdev_phys_t)) |
| continue; |
| |
| if (nvlist_unpack(labels[l].vp_nvlist, |
| sizeof (labels[l].vp_nvlist), config, 0) != 0) |
| continue; |
| |
| if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_GUID, |
| &guid) != 0 || guid == 0) { |
| nvlist_free(*config); |
| continue; |
| } |
| |
| if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE, |
| &state) != 0 || state > POOL_STATE_L2CACHE) { |
| nvlist_free(*config); |
| continue; |
| } |
| |
| if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE && |
| (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG, |
| &txg) != 0 || txg == 0)) { |
| nvlist_free(*config); |
| continue; |
| } |
| |
| if (expected_guid) { |
| if (expected_guid == guid) |
| count++; |
| |
| nvlist_free(*config); |
| } else { |
| expected_config = *config; |
| expected_guid = guid; |
| count++; |
| } |
| } |
| |
| if (num_labels != NULL) |
| *num_labels = count; |
| |
| free(labels); |
| *config = expected_config; |
| |
| return (0); |
| } |
| |
| /* |
| * Sorted by full path and then vdev guid to allow for multiple entries with |
| * the same full path name. This is required because it's possible to |
| * have multiple block devices with labels that refer to the same |
| * ZPOOL_CONFIG_PATH yet have different vdev guids. In this case both |
| * entries need to be added to the cache. Scenarios where this can occur |
| * include overwritten pool labels, devices which are visible from multiple |
| * hosts and multipath devices. |
| */ |
| int |
| slice_cache_compare(const void *arg1, const void *arg2) |
| { |
| const char *nm1 = ((rdsk_node_t *)arg1)->rn_name; |
| const char *nm2 = ((rdsk_node_t *)arg2)->rn_name; |
| uint64_t guid1 = ((rdsk_node_t *)arg1)->rn_vdev_guid; |
| uint64_t guid2 = ((rdsk_node_t *)arg2)->rn_vdev_guid; |
| int rv; |
| |
| rv = TREE_ISIGN(strcmp(nm1, nm2)); |
| if (rv) |
| return (rv); |
| |
| return (TREE_CMP(guid1, guid2)); |
| } |
| |
| static int |
| label_paths_impl(libpc_handle_t *hdl, nvlist_t *nvroot, uint64_t pool_guid, |
| uint64_t vdev_guid, char **path, char **devid) |
| { |
| nvlist_t **child; |
| uint_t c, children; |
| uint64_t guid; |
| char *val; |
| int error; |
| |
| if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, |
| &child, &children) == 0) { |
| for (c = 0; c < children; c++) { |
| error = label_paths_impl(hdl, child[c], |
| pool_guid, vdev_guid, path, devid); |
| if (error) |
| return (error); |
| } |
| return (0); |
| } |
| |
| if (nvroot == NULL) |
| return (0); |
| |
| error = nvlist_lookup_uint64(nvroot, ZPOOL_CONFIG_GUID, &guid); |
| if ((error != 0) || (guid != vdev_guid)) |
| return (0); |
| |
| error = nvlist_lookup_string(nvroot, ZPOOL_CONFIG_PATH, &val); |
| if (error == 0) |
| *path = val; |
| |
| error = nvlist_lookup_string(nvroot, ZPOOL_CONFIG_DEVID, &val); |
| if (error == 0) |
| *devid = val; |
| |
| return (0); |
| } |
| |
| /* |
| * Given a disk label fetch the ZPOOL_CONFIG_PATH and ZPOOL_CONFIG_DEVID |
| * and store these strings as config_path and devid_path respectively. |
| * The returned pointers are only valid as long as label remains valid. |
| */ |
| int |
| label_paths(libpc_handle_t *hdl, nvlist_t *label, char **path, char **devid) |
| { |
| nvlist_t *nvroot; |
| uint64_t pool_guid; |
| uint64_t vdev_guid; |
| |
| *path = NULL; |
| *devid = NULL; |
| |
| if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || |
| nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, &pool_guid) || |
| nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &vdev_guid)) |
| return (ENOENT); |
| |
| return (label_paths_impl(hdl, nvroot, pool_guid, vdev_guid, path, |
| devid)); |
| } |
| |
| static void |
| zpool_find_import_scan_add_slice(libpc_handle_t *hdl, pthread_mutex_t *lock, |
| avl_tree_t *cache, const char *path, const char *name, int order) |
| { |
| avl_index_t where; |
| rdsk_node_t *slice; |
| |
| slice = zutil_alloc(hdl, sizeof (rdsk_node_t)); |
| if (asprintf(&slice->rn_name, "%s/%s", path, name) == -1) { |
| free(slice); |
| return; |
| } |
| slice->rn_vdev_guid = 0; |
| slice->rn_lock = lock; |
| slice->rn_avl = cache; |
| slice->rn_hdl = hdl; |
| slice->rn_order = order + IMPORT_ORDER_SCAN_OFFSET; |
| slice->rn_labelpaths = B_FALSE; |
| |
| pthread_mutex_lock(lock); |
| if (avl_find(cache, slice, &where)) { |
| free(slice->rn_name); |
| free(slice); |
| } else { |
| avl_insert(cache, slice, where); |
| } |
| pthread_mutex_unlock(lock); |
| } |
| |
| static int |
| zpool_find_import_scan_dir(libpc_handle_t *hdl, pthread_mutex_t *lock, |
| avl_tree_t *cache, const char *dir, int order) |
| { |
| int error; |
| char path[MAXPATHLEN]; |
| struct dirent64 *dp; |
| DIR *dirp; |
| |
| if (realpath(dir, path) == NULL) { |
| error = errno; |
| if (error == ENOENT) |
| return (0); |
| |
| zutil_error_aux(hdl, strerror(error)); |
| (void) zutil_error_fmt(hdl, EZFS_BADPATH, dgettext( |
| TEXT_DOMAIN, "cannot resolve path '%s'"), dir); |
| return (error); |
| } |
| |
| dirp = opendir(path); |
| if (dirp == NULL) { |
| error = errno; |
| zutil_error_aux(hdl, strerror(error)); |
| (void) zutil_error_fmt(hdl, EZFS_BADPATH, |
| dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); |
| return (error); |
| } |
| |
| while ((dp = readdir64(dirp)) != NULL) { |
| const char *name = dp->d_name; |
| if (name[0] == '.' && |
| (name[1] == 0 || (name[1] == '.' && name[2] == 0))) |
| continue; |
| |
| zpool_find_import_scan_add_slice(hdl, lock, cache, path, name, |
| order); |
| } |
| |
| (void) closedir(dirp); |
| return (0); |
| } |
| |
| static int |
| zpool_find_import_scan_path(libpc_handle_t *hdl, pthread_mutex_t *lock, |
| avl_tree_t *cache, const char *dir, int order) |
| { |
| int error = 0; |
| char path[MAXPATHLEN]; |
| char *d, *b; |
| char *dpath, *name; |
| |
| /* |
| * Separate the directory part and last part of the |
| * path. We do this so that we can get the realpath of |
| * the directory. We don't get the realpath on the |
| * whole path because if it's a symlink, we want the |
| * path of the symlink not where it points to. |
| */ |
| d = zutil_strdup(hdl, dir); |
| b = zutil_strdup(hdl, dir); |
| dpath = dirname(d); |
| name = basename(b); |
| |
| if (realpath(dpath, path) == NULL) { |
| error = errno; |
| if (error == ENOENT) { |
| error = 0; |
| goto out; |
| } |
| |
| zutil_error_aux(hdl, strerror(error)); |
| (void) zutil_error_fmt(hdl, EZFS_BADPATH, dgettext( |
| TEXT_DOMAIN, "cannot resolve path '%s'"), dir); |
| goto out; |
| } |
| |
| zpool_find_import_scan_add_slice(hdl, lock, cache, path, name, order); |
| |
| out: |
| free(b); |
| free(d); |
| return (error); |
| } |
| |
| /* |
| * Scan a list of directories for zfs devices. |
| */ |
| static int |
| zpool_find_import_scan(libpc_handle_t *hdl, pthread_mutex_t *lock, |
| avl_tree_t **slice_cache, const char * const *dir, size_t dirs) |
| { |
| avl_tree_t *cache; |
| rdsk_node_t *slice; |
| void *cookie; |
| int i, error; |
| |
| *slice_cache = NULL; |
| cache = zutil_alloc(hdl, sizeof (avl_tree_t)); |
| avl_create(cache, slice_cache_compare, sizeof (rdsk_node_t), |
| offsetof(rdsk_node_t, rn_node)); |
| |
| for (i = 0; i < dirs; i++) { |
| struct stat sbuf; |
| |
| if (stat(dir[i], &sbuf) != 0) { |
| error = errno; |
| if (error == ENOENT) |
| continue; |
| |
| zutil_error_aux(hdl, strerror(error)); |
| (void) zutil_error_fmt(hdl, EZFS_BADPATH, dgettext( |
| TEXT_DOMAIN, "cannot resolve path '%s'"), dir[i]); |
| goto error; |
| } |
| |
| /* |
| * If dir[i] is a directory, we walk through it and add all |
| * the entries to the cache. If it's not a directory, we just |
| * add it to the cache. |
| */ |
| if (S_ISDIR(sbuf.st_mode)) { |
| if ((error = zpool_find_import_scan_dir(hdl, lock, |
| cache, dir[i], i)) != 0) |
| goto error; |
| } else { |
| if ((error = zpool_find_import_scan_path(hdl, lock, |
| cache, dir[i], i)) != 0) |
| goto error; |
| } |
| } |
| |
| *slice_cache = cache; |
| return (0); |
| |
| error: |
| cookie = NULL; |
| while ((slice = avl_destroy_nodes(cache, &cookie)) != NULL) { |
| free(slice->rn_name); |
| free(slice); |
| } |
| free(cache); |
| |
| return (error); |
| } |
| |
| /* |
| * Given a list of directories to search, find all pools stored on disk. This |
| * includes partial pools which are not available to import. If no args are |
| * given (argc is 0), then the default directory (/dev/dsk) is searched. |
| * poolname or guid (but not both) are provided by the caller when trying |
| * to import a specific pool. |
| */ |
| static nvlist_t * |
| zpool_find_import_impl(libpc_handle_t *hdl, importargs_t *iarg, |
| pthread_mutex_t *lock, avl_tree_t *cache) |
| { |
| nvlist_t *ret = NULL; |
| pool_list_t pools = { 0 }; |
| pool_entry_t *pe, *penext; |
| vdev_entry_t *ve, *venext; |
| config_entry_t *ce, *cenext; |
| name_entry_t *ne, *nenext; |
| rdsk_node_t *slice; |
| void *cookie; |
| tpool_t *t; |
| |
| verify(iarg->poolname == NULL || iarg->guid == 0); |
| |
| /* |
| * Create a thread pool to parallelize the process of reading and |
| * validating labels, a large number of threads can be used due to |
| * minimal contention. |
| */ |
| t = tpool_create(1, 2 * sysconf(_SC_NPROCESSORS_ONLN), 0, NULL); |
| for (slice = avl_first(cache); slice; |
| (slice = avl_walk(cache, slice, AVL_AFTER))) |
| (void) tpool_dispatch(t, zpool_open_func, slice); |
| |
| tpool_wait(t); |
| tpool_destroy(t); |
| |
| /* |
| * Process the cache, filtering out any entries which are not |
| * for the specified pool then adding matching label configs. |
| */ |
| cookie = NULL; |
| while ((slice = avl_destroy_nodes(cache, &cookie)) != NULL) { |
| if (slice->rn_config != NULL) { |
| nvlist_t *config = slice->rn_config; |
| boolean_t matched = B_TRUE; |
| boolean_t aux = B_FALSE; |
| int fd; |
| |
| /* |
| * Check if it's a spare or l2cache device. If it is, |
| * we need to skip the name and guid check since they |
| * don't exist on aux device label. |
| */ |
| if (iarg->poolname != NULL || iarg->guid != 0) { |
| uint64_t state; |
| aux = nvlist_lookup_uint64(config, |
| ZPOOL_CONFIG_POOL_STATE, &state) == 0 && |
| (state == POOL_STATE_SPARE || |
| state == POOL_STATE_L2CACHE); |
| } |
| |
| if (iarg->poolname != NULL && !aux) { |
| char *pname; |
| |
| matched = nvlist_lookup_string(config, |
| ZPOOL_CONFIG_POOL_NAME, &pname) == 0 && |
| strcmp(iarg->poolname, pname) == 0; |
| } else if (iarg->guid != 0 && !aux) { |
| uint64_t this_guid; |
| |
| matched = nvlist_lookup_uint64(config, |
| ZPOOL_CONFIG_POOL_GUID, &this_guid) == 0 && |
| iarg->guid == this_guid; |
| } |
| if (matched) { |
| /* |
| * Verify all remaining entries can be opened |
| * exclusively. This will prune all underlying |
| * multipath devices which otherwise could |
| * result in the vdev appearing as UNAVAIL. |
| * |
| * Under zdb, this step isn't required and |
| * would prevent a zdb -e of active pools with |
| * no cachefile. |
| */ |
| fd = open(slice->rn_name, |
| O_RDONLY | O_EXCL | O_CLOEXEC); |
| if (fd >= 0 || iarg->can_be_active) { |
| if (fd >= 0) |
| close(fd); |
| add_config(hdl, &pools, |
| slice->rn_name, slice->rn_order, |
| slice->rn_num_labels, config); |
| } |
| } |
| nvlist_free(config); |
| } |
| free(slice->rn_name); |
| free(slice); |
| } |
| avl_destroy(cache); |
| free(cache); |
| |
| ret = get_configs(hdl, &pools, iarg->can_be_active, iarg->policy); |
| |
| for (pe = pools.pools; pe != NULL; pe = penext) { |
| penext = pe->pe_next; |
| for (ve = pe->pe_vdevs; ve != NULL; ve = venext) { |
| venext = ve->ve_next; |
| for (ce = ve->ve_configs; ce != NULL; ce = cenext) { |
| cenext = ce->ce_next; |
| nvlist_free(ce->ce_config); |
| free(ce); |
| } |
| free(ve); |
| } |
| free(pe); |
| } |
| |
| for (ne = pools.names; ne != NULL; ne = nenext) { |
| nenext = ne->ne_next; |
| free(ne->ne_name); |
| free(ne); |
| } |
| |
| return (ret); |
| } |
| |
| /* |
| * Given a config, discover the paths for the devices which |
| * exist in the config. |
| */ |
| static int |
| discover_cached_paths(libpc_handle_t *hdl, nvlist_t *nv, |
| avl_tree_t *cache, pthread_mutex_t *lock) |
| { |
| char *path = NULL; |
| uint_t children; |
| nvlist_t **child; |
| |
| if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, |
| &child, &children) == 0) { |
| for (int c = 0; c < children; c++) { |
| discover_cached_paths(hdl, child[c], cache, lock); |
| } |
| } |
| |
| /* |
| * Once we have the path, we need to add the directory to |
| * our directory cache. |
| */ |
| if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) == 0) { |
| return (zpool_find_import_scan_dir(hdl, lock, cache, |
| dirname(path), 0)); |
| } |
| return (0); |
| } |
| |
| /* |
| * Given a cache file, return the contents as a list of importable pools. |
| * poolname or guid (but not both) are provided by the caller when trying |
| * to import a specific pool. |
| */ |
| static nvlist_t * |
| zpool_find_import_cached(libpc_handle_t *hdl, importargs_t *iarg) |
| { |
| char *buf; |
| int fd; |
| struct stat64 statbuf; |
| nvlist_t *raw, *src, *dst; |
| nvlist_t *pools; |
| nvpair_t *elem; |
| char *name; |
| uint64_t this_guid; |
| boolean_t active; |
| |
| verify(iarg->poolname == NULL || iarg->guid == 0); |
| |
| if ((fd = open(iarg->cachefile, O_RDONLY | O_CLOEXEC)) < 0) { |
| zutil_error_aux(hdl, "%s", strerror(errno)); |
| (void) zutil_error(hdl, EZFS_BADCACHE, |
| dgettext(TEXT_DOMAIN, "failed to open cache file")); |
| return (NULL); |
| } |
| |
| if (fstat64(fd, &statbuf) != 0) { |
| zutil_error_aux(hdl, "%s", strerror(errno)); |
| (void) close(fd); |
| (void) zutil_error(hdl, EZFS_BADCACHE, |
| dgettext(TEXT_DOMAIN, "failed to get size of cache file")); |
| return (NULL); |
| } |
| |
| if ((buf = zutil_alloc(hdl, statbuf.st_size)) == NULL) { |
| (void) close(fd); |
| return (NULL); |
| } |
| |
| if (read(fd, buf, statbuf.st_size) != statbuf.st_size) { |
| (void) close(fd); |
| free(buf); |
| (void) zutil_error(hdl, EZFS_BADCACHE, |
| dgettext(TEXT_DOMAIN, |
| "failed to read cache file contents")); |
| return (NULL); |
| } |
| |
| (void) close(fd); |
| |
| if (nvlist_unpack(buf, statbuf.st_size, &raw, 0) != 0) { |
| free(buf); |
| (void) zutil_error(hdl, EZFS_BADCACHE, |
| dgettext(TEXT_DOMAIN, |
| "invalid or corrupt cache file contents")); |
| return (NULL); |
| } |
| |
| free(buf); |
| |
| /* |
| * Go through and get the current state of the pools and refresh their |
| * state. |
| */ |
| if (nvlist_alloc(&pools, 0, 0) != 0) { |
| (void) zutil_no_memory(hdl); |
| nvlist_free(raw); |
| return (NULL); |
| } |
| |
| elem = NULL; |
| while ((elem = nvlist_next_nvpair(raw, elem)) != NULL) { |
| src = fnvpair_value_nvlist(elem); |
| |
| name = fnvlist_lookup_string(src, ZPOOL_CONFIG_POOL_NAME); |
| if (iarg->poolname != NULL && strcmp(iarg->poolname, name) != 0) |
| continue; |
| |
| this_guid = fnvlist_lookup_uint64(src, ZPOOL_CONFIG_POOL_GUID); |
| if (iarg->guid != 0 && iarg->guid != this_guid) |
| continue; |
| |
| if (zutil_pool_active(hdl, name, this_guid, &active) != 0) { |
| nvlist_free(raw); |
| nvlist_free(pools); |
| return (NULL); |
| } |
| |
| if (active) |
| continue; |
| |
| if (iarg->scan) { |
| uint64_t saved_guid = iarg->guid; |
| const char *saved_poolname = iarg->poolname; |
| pthread_mutex_t lock; |
| |
| /* |
| * Create the device cache that will hold the |
| * devices we will scan based on the cachefile. |
| * This will get destroyed and freed by |
| * zpool_find_import_impl. |
| */ |
| avl_tree_t *cache = zutil_alloc(hdl, |
| sizeof (avl_tree_t)); |
| avl_create(cache, slice_cache_compare, |
| sizeof (rdsk_node_t), |
| offsetof(rdsk_node_t, rn_node)); |
| nvlist_t *nvroot = fnvlist_lookup_nvlist(src, |
| ZPOOL_CONFIG_VDEV_TREE); |
| |
| /* |
| * We only want to find the pool with this_guid. |
| * We will reset these values back later. |
| */ |
| iarg->guid = this_guid; |
| iarg->poolname = NULL; |
| |
| /* |
| * We need to build up a cache of devices that exists |
| * in the paths pointed to by the cachefile. This allows |
| * us to preserve the device namespace that was |
| * originally specified by the user but also lets us |
| * scan devices in those directories in case they had |
| * been renamed. |
| */ |
| pthread_mutex_init(&lock, NULL); |
| discover_cached_paths(hdl, nvroot, cache, &lock); |
| nvlist_t *nv = zpool_find_import_impl(hdl, iarg, |
| &lock, cache); |
| pthread_mutex_destroy(&lock); |
| |
| /* |
| * zpool_find_import_impl will return back |
| * a list of pools that it found based on the |
| * device cache. There should only be one pool |
| * since we're looking for a specific guid. |
| * We will use that pool to build up the final |
| * pool nvlist which is returned back to the |
| * caller. |
| */ |
| nvpair_t *pair = nvlist_next_nvpair(nv, NULL); |
| if (pair == NULL) |
| continue; |
| fnvlist_add_nvlist(pools, nvpair_name(pair), |
| fnvpair_value_nvlist(pair)); |
| |
| VERIFY3P(nvlist_next_nvpair(nv, pair), ==, NULL); |
| |
| iarg->guid = saved_guid; |
| iarg->poolname = saved_poolname; |
| continue; |
| } |
| |
| if (nvlist_add_string(src, ZPOOL_CONFIG_CACHEFILE, |
| iarg->cachefile) != 0) { |
| (void) zutil_no_memory(hdl); |
| nvlist_free(raw); |
| nvlist_free(pools); |
| return (NULL); |
| } |
| |
| update_vdevs_config_dev_sysfs_path(src); |
| |
| if ((dst = zutil_refresh_config(hdl, src)) == NULL) { |
| nvlist_free(raw); |
| nvlist_free(pools); |
| return (NULL); |
| } |
| |
| if (nvlist_add_nvlist(pools, nvpair_name(elem), dst) != 0) { |
| (void) zutil_no_memory(hdl); |
| nvlist_free(dst); |
| nvlist_free(raw); |
| nvlist_free(pools); |
| return (NULL); |
| } |
| nvlist_free(dst); |
| } |
| nvlist_free(raw); |
| return (pools); |
| } |
| |
| static nvlist_t * |
| zpool_find_import(libpc_handle_t *hdl, importargs_t *iarg) |
| { |
| pthread_mutex_t lock; |
| avl_tree_t *cache; |
| nvlist_t *pools = NULL; |
| |
| verify(iarg->poolname == NULL || iarg->guid == 0); |
| pthread_mutex_init(&lock, NULL); |
| |
| /* |
| * Locate pool member vdevs by blkid or by directory scanning. |
| * On success a newly allocated AVL tree which is populated with an |
| * entry for each discovered vdev will be returned in the cache. |
| * It's the caller's responsibility to consume and destroy this tree. |
| */ |
| if (iarg->scan || iarg->paths != 0) { |
| size_t dirs = iarg->paths; |
| const char * const *dir = (const char * const *)iarg->path; |
| |
| if (dirs == 0) |
| dir = zpool_default_search_paths(&dirs); |
| |
| if (zpool_find_import_scan(hdl, &lock, &cache, |
| dir, dirs) != 0) { |
| pthread_mutex_destroy(&lock); |
| return (NULL); |
| } |
| } else { |
| if (zpool_find_import_blkid(hdl, &lock, &cache) != 0) { |
| pthread_mutex_destroy(&lock); |
| return (NULL); |
| } |
| } |
| |
| pools = zpool_find_import_impl(hdl, iarg, &lock, cache); |
| pthread_mutex_destroy(&lock); |
| return (pools); |
| } |
| |
| |
| nvlist_t * |
| zpool_search_import(void *hdl, importargs_t *import, |
| const pool_config_ops_t *pco) |
| { |
| libpc_handle_t handle = { 0 }; |
| nvlist_t *pools = NULL; |
| |
| handle.lpc_lib_handle = hdl; |
| handle.lpc_ops = pco; |
| handle.lpc_printerr = B_TRUE; |
| |
| verify(import->poolname == NULL || import->guid == 0); |
| |
| if (import->cachefile != NULL) |
| pools = zpool_find_import_cached(&handle, import); |
| else |
| pools = zpool_find_import(&handle, import); |
| |
| if ((pools == NULL || nvlist_empty(pools)) && |
| handle.lpc_open_access_error && geteuid() != 0) { |
| (void) zutil_error(&handle, EZFS_EACESS, dgettext(TEXT_DOMAIN, |
| "no pools found")); |
| } |
| |
| return (pools); |
| } |
| |
| static boolean_t |
| pool_match(nvlist_t *cfg, char *tgt) |
| { |
| uint64_t v, guid = strtoull(tgt, NULL, 0); |
| char *s; |
| |
| if (guid != 0) { |
| if (nvlist_lookup_uint64(cfg, ZPOOL_CONFIG_POOL_GUID, &v) == 0) |
| return (v == guid); |
| } else { |
| if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &s) == 0) |
| return (strcmp(s, tgt) == 0); |
| } |
| return (B_FALSE); |
| } |
| |
| int |
| zpool_find_config(void *hdl, const char *target, nvlist_t **configp, |
| importargs_t *args, const pool_config_ops_t *pco) |
| { |
| nvlist_t *pools; |
| nvlist_t *match = NULL; |
| nvlist_t *config = NULL; |
| char *sepp = NULL; |
| int count = 0; |
| char *targetdup = strdup(target); |
| |
| *configp = NULL; |
| |
| if ((sepp = strpbrk(targetdup, "/@")) != NULL) |
| *sepp = '\0'; |
| |
| pools = zpool_search_import(hdl, args, pco); |
| |
| if (pools != NULL) { |
| nvpair_t *elem = NULL; |
| while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) { |
| VERIFY0(nvpair_value_nvlist(elem, &config)); |
| if (pool_match(config, targetdup)) { |
| count++; |
| if (match != NULL) { |
| /* multiple matches found */ |
| continue; |
| } else { |
| match = fnvlist_dup(config); |
| } |
| } |
| } |
| fnvlist_free(pools); |
| } |
| |
| if (count == 0) { |
| free(targetdup); |
| return (ENOENT); |
| } |
| |
| if (count > 1) { |
| free(targetdup); |
| fnvlist_free(match); |
| return (EINVAL); |
| } |
| |
| *configp = match; |
| free(targetdup); |
| |
| return (0); |
| } |
| |
| /* |
| * Internal function for iterating over the vdevs. |
| * |
| * For each vdev, func() will be called and will be passed 'zhp' (which is |
| * typically the zpool_handle_t cast as a void pointer), the vdev's nvlist, and |
| * a user-defined data pointer). |
| * |
| * The return values from all the func() calls will be OR'd together and |
| * returned. |
| */ |
| int |
| for_each_vdev_cb(void *zhp, nvlist_t *nv, pool_vdev_iter_f func, |
| void *data) |
| { |
| nvlist_t **child; |
| uint_t c, children; |
| int ret = 0; |
| int i; |
| char *type; |
| |
| const char *list[] = { |
| ZPOOL_CONFIG_SPARES, |
| ZPOOL_CONFIG_L2CACHE, |
| ZPOOL_CONFIG_CHILDREN |
| }; |
| |
| for (i = 0; i < ARRAY_SIZE(list); i++) { |
| if (nvlist_lookup_nvlist_array(nv, list[i], &child, |
| &children) == 0) { |
| for (c = 0; c < children; c++) { |
| uint64_t ishole = 0; |
| |
| (void) nvlist_lookup_uint64(child[c], |
| ZPOOL_CONFIG_IS_HOLE, &ishole); |
| |
| if (ishole) |
| continue; |
| |
| ret |= for_each_vdev_cb(zhp, child[c], |
| func, data); |
| } |
| } |
| } |
| |
| if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) |
| return (ret); |
| |
| /* Don't run our function on root vdevs */ |
| if (strcmp(type, VDEV_TYPE_ROOT) != 0) { |
| ret |= func(zhp, nv, data); |
| } |
| |
| return (ret); |
| } |
| |
| /* |
| * Given an ZPOOL_CONFIG_VDEV_TREE nvpair, iterate over all the vdevs, calling |
| * func() for each one. func() is passed the vdev's nvlist and an optional |
| * user-defined 'data' pointer. |
| */ |
| int |
| for_each_vdev_in_nvlist(nvlist_t *nvroot, pool_vdev_iter_f func, void *data) |
| { |
| return (for_each_vdev_cb(NULL, nvroot, func, data)); |
| } |