/* * 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. */ /* * 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 describes 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 kept 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", "ZFS-8000-HC", "ZFS-8000-JQ", "ZFS-8000-K4", }; #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_faulted(uint64_t state, uint64_t aux, uint64_t errs) { return (state == VDEV_STATE_FAULTED); } /* ARGSUSED */ static int vdev_errors(uint64_t state, uint64_t aux, uint64_t errs) { return (state == VDEV_STATE_DEGRADED || 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); } /* ARGSUSED */ static int vdev_removed(uint64_t state, uint64_t aux, uint64_t errs) { return (state == VDEV_STATE_REMOVED); } /* * 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_VDEV_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 faulted or missing devices in a non-replicated config * - Check for any data errors * - Check for any faulted or 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; pool_scan_stat_t *ps = NULL; uint_t vsc, psc; uint64_t nerr; uint64_t version; uint64_t stateval; uint64_t suspended; 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_VDEV_STATS, (uint64_t **)&vs, &vsc) == 0); verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, &stateval) == 0); /* * Currently resilvering a vdev */ (void) nvlist_lookup_uint64_array(nvroot, ZPOOL_CONFIG_SCAN_STATS, (uint64_t **)&ps, &psc); if (ps && ps->pss_func == POOL_SCAN_RESILVER && ps->pss_state == DSS_SCANNING) return (ZPOOL_STATUS_RESILVERING); /* * Pool last accessed by another system. */ (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_HOSTID, &hostid); 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); /* * Check whether the pool has suspended due to failed I/O. */ if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_SUSPENDED, &suspended) == 0) { if (suspended == ZIO_FAILURE_MODE_CONTINUE) return (ZPOOL_STATUS_IO_FAILURE_CONTINUE); return (ZPOOL_STATUS_IO_FAILURE_WAIT); } /* * Could not read a log. */ if (vs->vs_state == VDEV_STATE_CANT_OPEN && vs->vs_aux == VDEV_AUX_BAD_LOG) { return (ZPOOL_STATUS_BAD_LOG); } /* * Bad devices in non-replicated config. */ if (vs->vs_state == VDEV_STATE_CANT_OPEN && find_vdev_problem(nvroot, vdev_faulted)) return (ZPOOL_STATUS_FAULTED_DEV_NR); 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_faulted)) return (ZPOOL_STATUS_FAULTED_DEV_R); 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); /* * Removed device */ if (find_vdev_problem(nvroot, vdev_removed)) return (ZPOOL_STATUS_REMOVED_DEV); /* * Outdated, but usable, version */ if (version < SPA_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[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); } static void dump_ddt_stat(const ddt_stat_t *dds, int h) { char refcnt[6]; char blocks[6], lsize[6], psize[6], dsize[6]; char ref_blocks[6], ref_lsize[6], ref_psize[6], ref_dsize[6]; if (dds == NULL || dds->dds_blocks == 0) return; if (h == -1) (void) strcpy(refcnt, "Total"); else zfs_nicenum(1ULL << h, refcnt, sizeof (refcnt)); zfs_nicenum(dds->dds_blocks, blocks, sizeof (blocks)); zfs_nicenum(dds->dds_lsize, lsize, sizeof (lsize)); zfs_nicenum(dds->dds_psize, psize, sizeof (psize)); zfs_nicenum(dds->dds_dsize, dsize, sizeof (dsize)); zfs_nicenum(dds->dds_ref_blocks, ref_blocks, sizeof (ref_blocks)); zfs_nicenum(dds->dds_ref_lsize, ref_lsize, sizeof (ref_lsize)); zfs_nicenum(dds->dds_ref_psize, ref_psize, sizeof (ref_psize)); zfs_nicenum(dds->dds_ref_dsize, ref_dsize, sizeof (ref_dsize)); (void) printf("%6s %6s %5s %5s %5s %6s %5s %5s %5s\n", refcnt, blocks, lsize, psize, dsize, ref_blocks, ref_lsize, ref_psize, ref_dsize); } /* * Print the DDT histogram and the column totals. */ void zpool_dump_ddt(const ddt_stat_t *dds_total, const ddt_histogram_t *ddh) { int h; (void) printf("\n"); (void) printf("bucket " " allocated " " referenced \n"); (void) printf("______ " "______________________________ " "______________________________\n"); (void) printf("%6s %6s %5s %5s %5s %6s %5s %5s %5s\n", "refcnt", "blocks", "LSIZE", "PSIZE", "DSIZE", "blocks", "LSIZE", "PSIZE", "DSIZE"); (void) printf("%6s %6s %5s %5s %5s %6s %5s %5s %5s\n", "------", "------", "-----", "-----", "-----", "------", "-----", "-----", "-----"); for (h = 0; h < 64; h++) dump_ddt_stat(&ddh->ddh_stat[h], h); dump_ddt_stat(dds_total, -1); (void) printf("\n"); }