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Diffstat (limited to 'cddl/contrib/opensolaris/lib/libzfs/common/libzfs_status.c')
| -rw-r--r-- | cddl/contrib/opensolaris/lib/libzfs/common/libzfs_status.c | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_status.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_status.c new file mode 100644 index 0000000..3eba97a --- /dev/null +++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_status.c @@ -0,0 +1,303 @@ +/* + * 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" + +/* + * This file contains the functions which analyze the status of a pool. This + * include both the status of an active pool, as well as the status exported + * pools. Returns one of the ZPOOL_STATUS_* defines describing the status of + * the pool. This status is independent (to a certain degree) from the state of + * the pool. A pool's state descsribes only whether or not it is capable of + * providing the necessary fault tolerance for data. The status describes the + * overall status of devices. A pool that is online can still have a device + * that is experiencing errors. + * + * Only a subset of the possible faults can be detected using 'zpool status', + * and not all possible errors correspond to a FMA message ID. The explanation + * is left up to the caller, depending on whether it is a live pool or an + * import. + */ + +#include <libzfs.h> +#include <string.h> +#include <unistd.h> +#include "libzfs_impl.h" + +/* + * Message ID table. This must be kep in sync with the ZPOOL_STATUS_* defines + * in libzfs.h. Note that there are some status results which go past the end + * of this table, and hence have no associated message ID. + */ +static char *zfs_msgid_table[] = { + "ZFS-8000-14", + "ZFS-8000-2Q", + "ZFS-8000-3C", + "ZFS-8000-4J", + "ZFS-8000-5E", + "ZFS-8000-6X", + "ZFS-8000-72", + "ZFS-8000-8A", + "ZFS-8000-9P", + "ZFS-8000-A5", + "ZFS-8000-EY" +}; + +/* + * If the pool is active, a certain class of static errors is overridden by the + * faults as analayzed by FMA. These faults have separate knowledge articles, + * and the article referred to by 'zpool status' must match that indicated by + * the syslog error message. We override missing data as well as corrupt pool. + */ +static char *zfs_msgid_table_active[] = { + "ZFS-8000-14", + "ZFS-8000-D3", /* overridden */ + "ZFS-8000-D3", /* overridden */ + "ZFS-8000-4J", + "ZFS-8000-5E", + "ZFS-8000-6X", + "ZFS-8000-CS", /* overridden */ + "ZFS-8000-8A", + "ZFS-8000-9P", + "ZFS-8000-CS", /* overridden */ +}; + +#define NMSGID (sizeof (zfs_msgid_table) / sizeof (zfs_msgid_table[0])) + +/* ARGSUSED */ +static int +vdev_missing(uint64_t state, uint64_t aux, uint64_t errs) +{ + return (state == VDEV_STATE_CANT_OPEN && + aux == VDEV_AUX_OPEN_FAILED); +} + +/* ARGSUSED */ +static int +vdev_errors(uint64_t state, uint64_t aux, uint64_t errs) +{ + return (errs != 0); +} + +/* ARGSUSED */ +static int +vdev_broken(uint64_t state, uint64_t aux, uint64_t errs) +{ + return (state == VDEV_STATE_CANT_OPEN); +} + +/* ARGSUSED */ +static int +vdev_offlined(uint64_t state, uint64_t aux, uint64_t errs) +{ + return (state == VDEV_STATE_OFFLINE); +} + +/* + * Detect if any leaf devices that have seen errors or could not be opened. + */ +static boolean_t +find_vdev_problem(nvlist_t *vdev, int (*func)(uint64_t, uint64_t, uint64_t)) +{ + nvlist_t **child; + vdev_stat_t *vs; + uint_t c, children; + char *type; + + /* + * Ignore problems within a 'replacing' vdev, since we're presumably in + * the process of repairing any such errors, and don't want to call them + * out again. We'll pick up the fact that a resilver is happening + * later. + */ + verify(nvlist_lookup_string(vdev, ZPOOL_CONFIG_TYPE, &type) == 0); + if (strcmp(type, VDEV_TYPE_REPLACING) == 0) + return (B_FALSE); + + if (nvlist_lookup_nvlist_array(vdev, ZPOOL_CONFIG_CHILDREN, &child, + &children) == 0) { + for (c = 0; c < children; c++) + if (find_vdev_problem(child[c], func)) + return (B_TRUE); + } else { + verify(nvlist_lookup_uint64_array(vdev, ZPOOL_CONFIG_STATS, + (uint64_t **)&vs, &c) == 0); + + if (func(vs->vs_state, vs->vs_aux, + vs->vs_read_errors + + vs->vs_write_errors + + vs->vs_checksum_errors)) + return (B_TRUE); + } + + return (B_FALSE); +} + +/* + * Active pool health status. + * + * To determine the status for a pool, we make several passes over the config, + * picking the most egregious error we find. In order of importance, we do the + * following: + * + * - Check for a complete and valid configuration + * - Look for any missing devices in a non-replicated config + * - Check for any data errors + * - Check for any missing devices in a replicated config + * - Look for any devices showing errors + * - Check for any resilvering devices + * + * There can obviously be multiple errors within a single pool, so this routine + * only picks the most damaging of all the current errors to report. + */ +static zpool_status_t +check_status(nvlist_t *config, boolean_t isimport) +{ + nvlist_t *nvroot; + vdev_stat_t *vs; + uint_t vsc; + uint64_t nerr; + uint64_t version; + uint64_t stateval; + uint64_t hostid = 0; + + verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, + &version) == 0); + verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, + &nvroot) == 0); + verify(nvlist_lookup_uint64_array(nvroot, ZPOOL_CONFIG_STATS, + (uint64_t **)&vs, &vsc) == 0); + verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, + &stateval) == 0); + (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_HOSTID, &hostid); + + /* + * Pool last accessed by another system. + */ + if (hostid != 0 && (unsigned long)hostid != gethostid() && + stateval == POOL_STATE_ACTIVE) + return (ZPOOL_STATUS_HOSTID_MISMATCH); + + /* + * Newer on-disk version. + */ + if (vs->vs_state == VDEV_STATE_CANT_OPEN && + vs->vs_aux == VDEV_AUX_VERSION_NEWER) + return (ZPOOL_STATUS_VERSION_NEWER); + + /* + * Check that the config is complete. + */ + if (vs->vs_state == VDEV_STATE_CANT_OPEN && + vs->vs_aux == VDEV_AUX_BAD_GUID_SUM) + return (ZPOOL_STATUS_BAD_GUID_SUM); + + /* + * Missing devices in non-replicated config. + */ + if (vs->vs_state == VDEV_STATE_CANT_OPEN && + find_vdev_problem(nvroot, vdev_missing)) + return (ZPOOL_STATUS_MISSING_DEV_NR); + + if (vs->vs_state == VDEV_STATE_CANT_OPEN && + find_vdev_problem(nvroot, vdev_broken)) + return (ZPOOL_STATUS_CORRUPT_LABEL_NR); + + /* + * Corrupted pool metadata + */ + if (vs->vs_state == VDEV_STATE_CANT_OPEN && + vs->vs_aux == VDEV_AUX_CORRUPT_DATA) + return (ZPOOL_STATUS_CORRUPT_POOL); + + /* + * Persistent data errors. + */ + if (!isimport) { + if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_ERRCOUNT, + &nerr) == 0 && nerr != 0) + return (ZPOOL_STATUS_CORRUPT_DATA); + } + + /* + * Missing devices in a replicated config. + */ + if (find_vdev_problem(nvroot, vdev_missing)) + return (ZPOOL_STATUS_MISSING_DEV_R); + if (find_vdev_problem(nvroot, vdev_broken)) + return (ZPOOL_STATUS_CORRUPT_LABEL_R); + + /* + * Devices with errors + */ + if (!isimport && find_vdev_problem(nvroot, vdev_errors)) + return (ZPOOL_STATUS_FAILING_DEV); + + /* + * Offlined devices + */ + if (find_vdev_problem(nvroot, vdev_offlined)) + return (ZPOOL_STATUS_OFFLINE_DEV); + + /* + * Currently resilvering + */ + if (!vs->vs_scrub_complete && vs->vs_scrub_type == POOL_SCRUB_RESILVER) + return (ZPOOL_STATUS_RESILVERING); + + /* + * Outdated, but usable, version + */ + if (version < ZFS_VERSION) + return (ZPOOL_STATUS_VERSION_OLDER); + + return (ZPOOL_STATUS_OK); +} + +zpool_status_t +zpool_get_status(zpool_handle_t *zhp, char **msgid) +{ + zpool_status_t ret = check_status(zhp->zpool_config, B_FALSE); + + if (ret >= NMSGID) + *msgid = NULL; + else + *msgid = zfs_msgid_table_active[ret]; + + return (ret); +} + +zpool_status_t +zpool_import_status(nvlist_t *config, char **msgid) +{ + zpool_status_t ret = check_status(config, B_TRUE); + + if (ret >= NMSGID) + *msgid = NULL; + else + *msgid = zfs_msgid_table[ret]; + + return (ret); +} |
