4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2012 by Delphix. All rights reserved.
28 * This file contains the functions which analyze the status of a pool. This
29 * include both the status of an active pool, as well as the status exported
30 * pools. Returns one of the ZPOOL_STATUS_* defines describing the status of
31 * the pool. This status is independent (to a certain degree) from the state of
32 * the pool. A pool's state describes only whether or not it is capable of
33 * providing the necessary fault tolerance for data. The status describes the
34 * overall status of devices. A pool that is online can still have a device
35 * that is experiencing errors.
37 * Only a subset of the possible faults can be detected using 'zpool status',
38 * and not all possible errors correspond to a FMA message ID. The explanation
39 * is left up to the caller, depending on whether it is a live pool or an
46 #include "libzfs_impl.h"
47 #include "zfeature_common.h"
50 * Message ID table. This must be kept in sync with the ZPOOL_STATUS_* defines
51 * in libzfs.h. Note that there are some status results which go past the end
52 * of this table, and hence have no associated message ID.
54 static char *zfs_msgid_table[] = {
71 #define NMSGID (sizeof (zfs_msgid_table) / sizeof (zfs_msgid_table[0]))
75 vdev_missing(uint64_t state, uint64_t aux, uint64_t errs)
77 return (state == VDEV_STATE_CANT_OPEN &&
78 aux == VDEV_AUX_OPEN_FAILED);
83 vdev_faulted(uint64_t state, uint64_t aux, uint64_t errs)
85 return (state == VDEV_STATE_FAULTED);
90 vdev_errors(uint64_t state, uint64_t aux, uint64_t errs)
92 return (state == VDEV_STATE_DEGRADED || errs != 0);
97 vdev_broken(uint64_t state, uint64_t aux, uint64_t errs)
99 return (state == VDEV_STATE_CANT_OPEN);
104 vdev_offlined(uint64_t state, uint64_t aux, uint64_t errs)
106 return (state == VDEV_STATE_OFFLINE);
111 vdev_removed(uint64_t state, uint64_t aux, uint64_t errs)
113 return (state == VDEV_STATE_REMOVED);
117 * Detect if any leaf devices that have seen errors or could not be opened.
120 find_vdev_problem(nvlist_t *vdev, int (*func)(uint64_t, uint64_t, uint64_t))
128 * Ignore problems within a 'replacing' vdev, since we're presumably in
129 * the process of repairing any such errors, and don't want to call them
130 * out again. We'll pick up the fact that a resilver is happening
133 verify(nvlist_lookup_string(vdev, ZPOOL_CONFIG_TYPE, &type) == 0);
134 if (strcmp(type, VDEV_TYPE_REPLACING) == 0)
137 if (nvlist_lookup_nvlist_array(vdev, ZPOOL_CONFIG_CHILDREN, &child,
139 for (c = 0; c < children; c++)
140 if (find_vdev_problem(child[c], func))
143 verify(nvlist_lookup_uint64_array(vdev, ZPOOL_CONFIG_VDEV_STATS,
144 (uint64_t **)&vs, &c) == 0);
146 if (func(vs->vs_state, vs->vs_aux,
148 vs->vs_write_errors +
149 vs->vs_checksum_errors))
154 * Check any L2 cache devs
156 if (nvlist_lookup_nvlist_array(vdev, ZPOOL_CONFIG_L2CACHE, &child,
158 for (c = 0; c < children; c++)
159 if (find_vdev_problem(child[c], func))
167 * Active pool health status.
169 * To determine the status for a pool, we make several passes over the config,
170 * picking the most egregious error we find. In order of importance, we do the
173 * - Check for a complete and valid configuration
174 * - Look for any faulted or missing devices in a non-replicated config
175 * - Check for any data errors
176 * - Check for any faulted or missing devices in a replicated config
177 * - Look for any devices showing errors
178 * - Check for any resilvering devices
180 * There can obviously be multiple errors within a single pool, so this routine
181 * only picks the most damaging of all the current errors to report.
183 static zpool_status_t
184 check_status(nvlist_t *config, boolean_t isimport)
188 pool_scan_stat_t *ps = NULL;
196 verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
198 verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
200 verify(nvlist_lookup_uint64_array(nvroot, ZPOOL_CONFIG_VDEV_STATS,
201 (uint64_t **)&vs, &vsc) == 0);
202 verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE,
206 * Currently resilvering a vdev
208 (void) nvlist_lookup_uint64_array(nvroot, ZPOOL_CONFIG_SCAN_STATS,
209 (uint64_t **)&ps, &psc);
210 if (ps && ps->pss_func == POOL_SCAN_RESILVER &&
211 ps->pss_state == DSS_SCANNING)
212 return (ZPOOL_STATUS_RESILVERING);
215 * Pool last accessed by another system.
217 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_HOSTID, &hostid);
218 if (hostid != 0 && (unsigned long)hostid != gethostid() &&
219 stateval == POOL_STATE_ACTIVE)
220 return (ZPOOL_STATUS_HOSTID_MISMATCH);
223 * Newer on-disk version.
225 if (vs->vs_state == VDEV_STATE_CANT_OPEN &&
226 vs->vs_aux == VDEV_AUX_VERSION_NEWER)
227 return (ZPOOL_STATUS_VERSION_NEWER);
230 * Unsupported feature(s).
232 if (vs->vs_state == VDEV_STATE_CANT_OPEN &&
233 vs->vs_aux == VDEV_AUX_UNSUP_FEAT) {
236 verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO,
238 if (nvlist_exists(nvinfo, ZPOOL_CONFIG_CAN_RDONLY))
239 return (ZPOOL_STATUS_UNSUP_FEAT_WRITE);
240 return (ZPOOL_STATUS_UNSUP_FEAT_READ);
244 * Check that the config is complete.
246 if (vs->vs_state == VDEV_STATE_CANT_OPEN &&
247 vs->vs_aux == VDEV_AUX_BAD_GUID_SUM)
248 return (ZPOOL_STATUS_BAD_GUID_SUM);
251 * Check whether the pool has suspended due to failed I/O.
253 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_SUSPENDED,
255 if (suspended == ZIO_FAILURE_MODE_CONTINUE)
256 return (ZPOOL_STATUS_IO_FAILURE_CONTINUE);
257 return (ZPOOL_STATUS_IO_FAILURE_WAIT);
261 * Could not read a log.
263 if (vs->vs_state == VDEV_STATE_CANT_OPEN &&
264 vs->vs_aux == VDEV_AUX_BAD_LOG) {
265 return (ZPOOL_STATUS_BAD_LOG);
269 * Bad devices in non-replicated config.
271 if (vs->vs_state == VDEV_STATE_CANT_OPEN &&
272 find_vdev_problem(nvroot, vdev_faulted))
273 return (ZPOOL_STATUS_FAULTED_DEV_NR);
275 if (vs->vs_state == VDEV_STATE_CANT_OPEN &&
276 find_vdev_problem(nvroot, vdev_missing))
277 return (ZPOOL_STATUS_MISSING_DEV_NR);
279 if (vs->vs_state == VDEV_STATE_CANT_OPEN &&
280 find_vdev_problem(nvroot, vdev_broken))
281 return (ZPOOL_STATUS_CORRUPT_LABEL_NR);
284 * Corrupted pool metadata
286 if (vs->vs_state == VDEV_STATE_CANT_OPEN &&
287 vs->vs_aux == VDEV_AUX_CORRUPT_DATA)
288 return (ZPOOL_STATUS_CORRUPT_POOL);
291 * Persistent data errors.
294 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_ERRCOUNT,
295 &nerr) == 0 && nerr != 0)
296 return (ZPOOL_STATUS_CORRUPT_DATA);
300 * Missing devices in a replicated config.
302 if (find_vdev_problem(nvroot, vdev_faulted))
303 return (ZPOOL_STATUS_FAULTED_DEV_R);
304 if (find_vdev_problem(nvroot, vdev_missing))
305 return (ZPOOL_STATUS_MISSING_DEV_R);
306 if (find_vdev_problem(nvroot, vdev_broken))
307 return (ZPOOL_STATUS_CORRUPT_LABEL_R);
310 * Devices with errors
312 if (!isimport && find_vdev_problem(nvroot, vdev_errors))
313 return (ZPOOL_STATUS_FAILING_DEV);
318 if (find_vdev_problem(nvroot, vdev_offlined))
319 return (ZPOOL_STATUS_OFFLINE_DEV);
324 if (find_vdev_problem(nvroot, vdev_removed))
325 return (ZPOOL_STATUS_REMOVED_DEV);
328 * Outdated, but usable, version
330 if (SPA_VERSION_IS_SUPPORTED(version) && version != SPA_VERSION)
331 return (ZPOOL_STATUS_VERSION_OLDER);
334 * Usable pool with disabled features
336 if (version >= SPA_VERSION_FEATURES) {
341 feat = fnvlist_lookup_nvlist(config,
342 ZPOOL_CONFIG_LOAD_INFO);
343 feat = fnvlist_lookup_nvlist(feat,
344 ZPOOL_CONFIG_ENABLED_FEAT);
346 feat = fnvlist_lookup_nvlist(config,
347 ZPOOL_CONFIG_FEATURE_STATS);
350 for (i = 0; i < SPA_FEATURES; i++) {
351 zfeature_info_t *fi = &spa_feature_table[i];
352 if (!nvlist_exists(feat, fi->fi_guid))
353 return (ZPOOL_STATUS_FEAT_DISABLED);
357 return (ZPOOL_STATUS_OK);
361 zpool_get_status(zpool_handle_t *zhp, char **msgid)
363 zpool_status_t ret = check_status(zhp->zpool_config, B_FALSE);
368 *msgid = zfs_msgid_table[ret];
374 zpool_import_status(nvlist_t *config, char **msgid)
376 zpool_status_t ret = check_status(config, B_TRUE);
381 *msgid = zfs_msgid_table[ret];
387 dump_ddt_stat(const ddt_stat_t *dds, int h)
390 char blocks[6], lsize[6], psize[6], dsize[6];
391 char ref_blocks[6], ref_lsize[6], ref_psize[6], ref_dsize[6];
393 if (dds == NULL || dds->dds_blocks == 0)
397 (void) strcpy(refcnt, "Total");
399 zfs_nicenum(1ULL << h, refcnt, sizeof (refcnt));
401 zfs_nicenum(dds->dds_blocks, blocks, sizeof (blocks));
402 zfs_nicenum(dds->dds_lsize, lsize, sizeof (lsize));
403 zfs_nicenum(dds->dds_psize, psize, sizeof (psize));
404 zfs_nicenum(dds->dds_dsize, dsize, sizeof (dsize));
405 zfs_nicenum(dds->dds_ref_blocks, ref_blocks, sizeof (ref_blocks));
406 zfs_nicenum(dds->dds_ref_lsize, ref_lsize, sizeof (ref_lsize));
407 zfs_nicenum(dds->dds_ref_psize, ref_psize, sizeof (ref_psize));
408 zfs_nicenum(dds->dds_ref_dsize, ref_dsize, sizeof (ref_dsize));
410 (void) printf("%6s %6s %5s %5s %5s %6s %5s %5s %5s\n",
412 blocks, lsize, psize, dsize,
413 ref_blocks, ref_lsize, ref_psize, ref_dsize);
417 * Print the DDT histogram and the column totals.
420 zpool_dump_ddt(const ddt_stat_t *dds_total, const ddt_histogram_t *ddh)
426 (void) printf("bucket "
429 (void) printf("______ "
430 "______________________________ "
431 "______________________________\n");
433 (void) printf("%6s %6s %5s %5s %5s %6s %5s %5s %5s\n",
435 "blocks", "LSIZE", "PSIZE", "DSIZE",
436 "blocks", "LSIZE", "PSIZE", "DSIZE");
438 (void) printf("%6s %6s %5s %5s %5s %6s %5s %5s %5s\n",
440 "------", "-----", "-----", "-----",
441 "------", "-----", "-----", "-----");
443 for (h = 0; h < 64; h++)
444 dump_ddt_stat(&ddh->ddh_stat[h], h);
446 dump_ddt_stat(dds_total, -1);