1 /* 2 * CDDL HEADER START 3 * 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. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 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] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2012 by Delphix. All rights reserved. 25 * Copyright (c) 2013 Steven Hartland. All rights reserved. 26 * Copyright (c) 2021, Colm Buckley <colm@tuatha.org> 27 */ 28 29 /* 30 * This file contains the functions which analyze the status of a pool. This 31 * include both the status of an active pool, as well as the status exported 32 * pools. Returns one of the ZPOOL_STATUS_* defines describing the status of 33 * the pool. This status is independent (to a certain degree) from the state of 34 * the pool. A pool's state describes only whether or not it is capable of 35 * providing the necessary fault tolerance for data. The status describes the 36 * overall status of devices. A pool that is online can still have a device 37 * that is experiencing errors. 38 * 39 * Only a subset of the possible faults can be detected using 'zpool status', 40 * and not all possible errors correspond to a FMA message ID. The explanation 41 * is left up to the caller, depending on whether it is a live pool or an 42 * import. 43 */ 44 45 #include <libzfs.h> 46 #include <libzutil.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 #include <sys/systeminfo.h> 51 #include "libzfs_impl.h" 52 #include "zfeature_common.h" 53 54 /* 55 * Message ID table. This must be kept in sync with the ZPOOL_STATUS_* defines 56 * in include/libzfs.h. Note that there are some status results which go past 57 * the end of this table, and hence have no associated message ID. 58 */ 59 static const char *const zfs_msgid_table[] = { 60 "ZFS-8000-14", /* ZPOOL_STATUS_CORRUPT_CACHE */ 61 "ZFS-8000-2Q", /* ZPOOL_STATUS_MISSING_DEV_R */ 62 "ZFS-8000-3C", /* ZPOOL_STATUS_MISSING_DEV_NR */ 63 "ZFS-8000-4J", /* ZPOOL_STATUS_CORRUPT_LABEL_R */ 64 "ZFS-8000-5E", /* ZPOOL_STATUS_CORRUPT_LABEL_NR */ 65 "ZFS-8000-6X", /* ZPOOL_STATUS_BAD_GUID_SUM */ 66 "ZFS-8000-72", /* ZPOOL_STATUS_CORRUPT_POOL */ 67 "ZFS-8000-8A", /* ZPOOL_STATUS_CORRUPT_DATA */ 68 "ZFS-8000-9P", /* ZPOOL_STATUS_FAILING_DEV */ 69 "ZFS-8000-A5", /* ZPOOL_STATUS_VERSION_NEWER */ 70 "ZFS-8000-EY", /* ZPOOL_STATUS_HOSTID_MISMATCH */ 71 "ZFS-8000-EY", /* ZPOOL_STATUS_HOSTID_ACTIVE */ 72 "ZFS-8000-EY", /* ZPOOL_STATUS_HOSTID_REQUIRED */ 73 "ZFS-8000-HC", /* ZPOOL_STATUS_IO_FAILURE_WAIT */ 74 "ZFS-8000-JQ", /* ZPOOL_STATUS_IO_FAILURE_CONTINUE */ 75 "ZFS-8000-MM", /* ZPOOL_STATUS_IO_FAILURE_MMP */ 76 "ZFS-8000-K4", /* ZPOOL_STATUS_BAD_LOG */ 77 "ZFS-8000-ER", /* ZPOOL_STATUS_ERRATA */ 78 /* 79 * The following results have no message ID. 80 * ZPOOL_STATUS_UNSUP_FEAT_READ 81 * ZPOOL_STATUS_UNSUP_FEAT_WRITE 82 * ZPOOL_STATUS_FAULTED_DEV_R 83 * ZPOOL_STATUS_FAULTED_DEV_NR 84 * ZPOOL_STATUS_VERSION_OLDER 85 * ZPOOL_STATUS_FEAT_DISABLED 86 * ZPOOL_STATUS_RESILVERING 87 * ZPOOL_STATUS_OFFLINE_DEV 88 * ZPOOL_STATUS_REMOVED_DEV 89 * ZPOOL_STATUS_REBUILDING 90 * ZPOOL_STATUS_REBUILD_SCRUB 91 * ZPOOL_STATUS_COMPATIBILITY_ERR 92 * ZPOOL_STATUS_INCOMPATIBLE_FEAT 93 * ZPOOL_STATUS_OK 94 */ 95 }; 96 97 #define NMSGID (sizeof (zfs_msgid_table) / sizeof (zfs_msgid_table[0])) 98 99 static int 100 vdev_missing(vdev_stat_t *vs, uint_t vsc) 101 { 102 (void) vsc; 103 return (vs->vs_state == VDEV_STATE_CANT_OPEN && 104 vs->vs_aux == VDEV_AUX_OPEN_FAILED); 105 } 106 107 static int 108 vdev_faulted(vdev_stat_t *vs, uint_t vsc) 109 { 110 (void) vsc; 111 return (vs->vs_state == VDEV_STATE_FAULTED); 112 } 113 114 static int 115 vdev_errors(vdev_stat_t *vs, uint_t vsc) 116 { 117 (void) vsc; 118 return (vs->vs_state == VDEV_STATE_DEGRADED || 119 vs->vs_read_errors != 0 || vs->vs_write_errors != 0 || 120 vs->vs_checksum_errors != 0); 121 } 122 123 static int 124 vdev_broken(vdev_stat_t *vs, uint_t vsc) 125 { 126 (void) vsc; 127 return (vs->vs_state == VDEV_STATE_CANT_OPEN); 128 } 129 130 static int 131 vdev_offlined(vdev_stat_t *vs, uint_t vsc) 132 { 133 (void) vsc; 134 return (vs->vs_state == VDEV_STATE_OFFLINE); 135 } 136 137 static int 138 vdev_removed(vdev_stat_t *vs, uint_t vsc) 139 { 140 (void) vsc; 141 return (vs->vs_state == VDEV_STATE_REMOVED); 142 } 143 144 static int 145 vdev_non_native_ashift(vdev_stat_t *vs, uint_t vsc) 146 { 147 if (getenv("ZPOOL_STATUS_NON_NATIVE_ASHIFT_IGNORE") != NULL) 148 return (0); 149 150 return (VDEV_STAT_VALID(vs_physical_ashift, vsc) && 151 vs->vs_configured_ashift < vs->vs_physical_ashift); 152 } 153 154 /* 155 * Detect if any leaf devices that have seen errors or could not be opened. 156 */ 157 static boolean_t 158 find_vdev_problem(nvlist_t *vdev, int (*func)(vdev_stat_t *, uint_t), 159 boolean_t ignore_replacing) 160 { 161 nvlist_t **child; 162 uint_t c, children; 163 164 /* 165 * Ignore problems within a 'replacing' vdev, since we're presumably in 166 * the process of repairing any such errors, and don't want to call them 167 * out again. We'll pick up the fact that a resilver is happening 168 * later. 169 */ 170 if (ignore_replacing == B_TRUE) { 171 const char *type = fnvlist_lookup_string(vdev, 172 ZPOOL_CONFIG_TYPE); 173 if (strcmp(type, VDEV_TYPE_REPLACING) == 0) 174 return (B_FALSE); 175 } 176 177 if (nvlist_lookup_nvlist_array(vdev, ZPOOL_CONFIG_CHILDREN, &child, 178 &children) == 0) { 179 for (c = 0; c < children; c++) 180 if (find_vdev_problem(child[c], func, ignore_replacing)) 181 return (B_TRUE); 182 } else { 183 uint_t vsc; 184 vdev_stat_t *vs = (vdev_stat_t *)fnvlist_lookup_uint64_array( 185 vdev, ZPOOL_CONFIG_VDEV_STATS, &vsc); 186 if (func(vs, vsc) != 0) 187 return (B_TRUE); 188 } 189 190 /* 191 * Check any L2 cache devs 192 */ 193 if (nvlist_lookup_nvlist_array(vdev, ZPOOL_CONFIG_L2CACHE, &child, 194 &children) == 0) { 195 for (c = 0; c < children; c++) 196 if (find_vdev_problem(child[c], func, ignore_replacing)) 197 return (B_TRUE); 198 } 199 200 return (B_FALSE); 201 } 202 203 /* 204 * Active pool health status. 205 * 206 * To determine the status for a pool, we make several passes over the config, 207 * picking the most egregious error we find. In order of importance, we do the 208 * following: 209 * 210 * - Check for a complete and valid configuration 211 * - Look for any faulted or missing devices in a non-replicated config 212 * - Check for any data errors 213 * - Check for any faulted or missing devices in a replicated config 214 * - Look for any devices showing errors 215 * - Check for any resilvering or rebuilding devices 216 * 217 * There can obviously be multiple errors within a single pool, so this routine 218 * only picks the most damaging of all the current errors to report. 219 */ 220 static zpool_status_t 221 check_status(nvlist_t *config, boolean_t isimport, 222 zpool_errata_t *erratap, const char *compat) 223 { 224 pool_scan_stat_t *ps = NULL; 225 uint_t vsc, psc; 226 uint64_t suspended; 227 uint64_t hostid = 0; 228 uint64_t errata = 0; 229 unsigned long system_hostid = get_system_hostid(); 230 231 uint64_t version = fnvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION); 232 nvlist_t *nvroot = fnvlist_lookup_nvlist(config, 233 ZPOOL_CONFIG_VDEV_TREE); 234 vdev_stat_t *vs = (vdev_stat_t *)fnvlist_lookup_uint64_array(nvroot, 235 ZPOOL_CONFIG_VDEV_STATS, &vsc); 236 uint64_t stateval = fnvlist_lookup_uint64(config, 237 ZPOOL_CONFIG_POOL_STATE); 238 239 /* 240 * Currently resilvering a vdev 241 */ 242 (void) nvlist_lookup_uint64_array(nvroot, ZPOOL_CONFIG_SCAN_STATS, 243 (uint64_t **)&ps, &psc); 244 if (ps != NULL && ps->pss_func == POOL_SCAN_RESILVER && 245 ps->pss_state == DSS_SCANNING) 246 return (ZPOOL_STATUS_RESILVERING); 247 248 /* 249 * Currently rebuilding a vdev, check top-level vdevs. 250 */ 251 vdev_rebuild_stat_t *vrs = NULL; 252 nvlist_t **child; 253 uint_t c, i, children; 254 uint64_t rebuild_end_time = 0; 255 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 256 &child, &children) == 0) { 257 for (c = 0; c < children; c++) { 258 if ((nvlist_lookup_uint64_array(child[c], 259 ZPOOL_CONFIG_REBUILD_STATS, 260 (uint64_t **)&vrs, &i) == 0) && (vrs != NULL)) { 261 uint64_t state = vrs->vrs_state; 262 263 if (state == VDEV_REBUILD_ACTIVE) { 264 return (ZPOOL_STATUS_REBUILDING); 265 } else if (state == VDEV_REBUILD_COMPLETE && 266 vrs->vrs_end_time > rebuild_end_time) { 267 rebuild_end_time = vrs->vrs_end_time; 268 } 269 } 270 } 271 272 /* 273 * If we can determine when the last scrub was run, and it 274 * was before the last rebuild completed, then recommend 275 * that the pool be scrubbed to verify all checksums. When 276 * ps is NULL we can infer the pool has never been scrubbed. 277 */ 278 if (rebuild_end_time > 0) { 279 if (ps != NULL) { 280 if ((ps->pss_state == DSS_FINISHED && 281 ps->pss_func == POOL_SCAN_SCRUB && 282 rebuild_end_time > ps->pss_end_time) || 283 ps->pss_state == DSS_NONE) 284 return (ZPOOL_STATUS_REBUILD_SCRUB); 285 } else { 286 return (ZPOOL_STATUS_REBUILD_SCRUB); 287 } 288 } 289 } 290 291 /* 292 * The multihost property is set and the pool may be active. 293 */ 294 if (vs->vs_state == VDEV_STATE_CANT_OPEN && 295 vs->vs_aux == VDEV_AUX_ACTIVE) { 296 mmp_state_t mmp_state; 297 nvlist_t *nvinfo; 298 299 nvinfo = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO); 300 mmp_state = fnvlist_lookup_uint64(nvinfo, 301 ZPOOL_CONFIG_MMP_STATE); 302 303 if (mmp_state == MMP_STATE_ACTIVE) 304 return (ZPOOL_STATUS_HOSTID_ACTIVE); 305 else if (mmp_state == MMP_STATE_NO_HOSTID) 306 return (ZPOOL_STATUS_HOSTID_REQUIRED); 307 else 308 return (ZPOOL_STATUS_HOSTID_MISMATCH); 309 } 310 311 /* 312 * Pool last accessed by another system. 313 */ 314 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_HOSTID, &hostid); 315 if (hostid != 0 && (unsigned long)hostid != system_hostid && 316 stateval == POOL_STATE_ACTIVE) 317 return (ZPOOL_STATUS_HOSTID_MISMATCH); 318 319 /* 320 * Newer on-disk version. 321 */ 322 if (vs->vs_state == VDEV_STATE_CANT_OPEN && 323 vs->vs_aux == VDEV_AUX_VERSION_NEWER) 324 return (ZPOOL_STATUS_VERSION_NEWER); 325 326 /* 327 * Unsupported feature(s). 328 */ 329 if (vs->vs_state == VDEV_STATE_CANT_OPEN && 330 vs->vs_aux == VDEV_AUX_UNSUP_FEAT) { 331 nvlist_t *nvinfo = fnvlist_lookup_nvlist(config, 332 ZPOOL_CONFIG_LOAD_INFO); 333 if (nvlist_exists(nvinfo, ZPOOL_CONFIG_CAN_RDONLY)) 334 return (ZPOOL_STATUS_UNSUP_FEAT_WRITE); 335 return (ZPOOL_STATUS_UNSUP_FEAT_READ); 336 } 337 338 /* 339 * Check that the config is complete. 340 */ 341 if (vs->vs_state == VDEV_STATE_CANT_OPEN && 342 vs->vs_aux == VDEV_AUX_BAD_GUID_SUM) 343 return (ZPOOL_STATUS_BAD_GUID_SUM); 344 345 /* 346 * Check whether the pool has suspended. 347 */ 348 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_SUSPENDED, 349 &suspended) == 0) { 350 uint64_t reason; 351 352 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_SUSPENDED_REASON, 353 &reason) == 0 && reason == ZIO_SUSPEND_MMP) 354 return (ZPOOL_STATUS_IO_FAILURE_MMP); 355 356 if (suspended == ZIO_FAILURE_MODE_CONTINUE) 357 return (ZPOOL_STATUS_IO_FAILURE_CONTINUE); 358 return (ZPOOL_STATUS_IO_FAILURE_WAIT); 359 } 360 361 /* 362 * Could not read a log. 363 */ 364 if (vs->vs_state == VDEV_STATE_CANT_OPEN && 365 vs->vs_aux == VDEV_AUX_BAD_LOG) { 366 return (ZPOOL_STATUS_BAD_LOG); 367 } 368 369 /* 370 * Bad devices in non-replicated config. 371 */ 372 if (vs->vs_state == VDEV_STATE_CANT_OPEN && 373 find_vdev_problem(nvroot, vdev_faulted, B_TRUE)) 374 return (ZPOOL_STATUS_FAULTED_DEV_NR); 375 376 if (vs->vs_state == VDEV_STATE_CANT_OPEN && 377 find_vdev_problem(nvroot, vdev_missing, B_TRUE)) 378 return (ZPOOL_STATUS_MISSING_DEV_NR); 379 380 if (vs->vs_state == VDEV_STATE_CANT_OPEN && 381 find_vdev_problem(nvroot, vdev_broken, B_TRUE)) 382 return (ZPOOL_STATUS_CORRUPT_LABEL_NR); 383 384 /* 385 * Corrupted pool metadata 386 */ 387 if (vs->vs_state == VDEV_STATE_CANT_OPEN && 388 vs->vs_aux == VDEV_AUX_CORRUPT_DATA) 389 return (ZPOOL_STATUS_CORRUPT_POOL); 390 391 /* 392 * Persistent data errors. 393 */ 394 if (!isimport) { 395 uint64_t nerr; 396 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_ERRCOUNT, 397 &nerr) == 0 && nerr != 0) 398 return (ZPOOL_STATUS_CORRUPT_DATA); 399 } 400 401 /* 402 * Missing devices in a replicated config. 403 */ 404 if (find_vdev_problem(nvroot, vdev_faulted, B_TRUE)) 405 return (ZPOOL_STATUS_FAULTED_DEV_R); 406 if (find_vdev_problem(nvroot, vdev_missing, B_TRUE)) 407 return (ZPOOL_STATUS_MISSING_DEV_R); 408 if (find_vdev_problem(nvroot, vdev_broken, B_TRUE)) 409 return (ZPOOL_STATUS_CORRUPT_LABEL_R); 410 411 /* 412 * Devices with errors 413 */ 414 if (!isimport && find_vdev_problem(nvroot, vdev_errors, B_TRUE)) 415 return (ZPOOL_STATUS_FAILING_DEV); 416 417 /* 418 * Offlined devices 419 */ 420 if (find_vdev_problem(nvroot, vdev_offlined, B_TRUE)) 421 return (ZPOOL_STATUS_OFFLINE_DEV); 422 423 /* 424 * Removed device 425 */ 426 if (find_vdev_problem(nvroot, vdev_removed, B_TRUE)) 427 return (ZPOOL_STATUS_REMOVED_DEV); 428 429 /* 430 * Suboptimal, but usable, ashift configuration. 431 */ 432 if (find_vdev_problem(nvroot, vdev_non_native_ashift, B_FALSE)) 433 return (ZPOOL_STATUS_NON_NATIVE_ASHIFT); 434 435 /* 436 * Informational errata available. 437 */ 438 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_ERRATA, &errata); 439 if (errata) { 440 *erratap = errata; 441 return (ZPOOL_STATUS_ERRATA); 442 } 443 444 /* 445 * Outdated, but usable, version 446 */ 447 if (SPA_VERSION_IS_SUPPORTED(version) && version != SPA_VERSION) { 448 /* "legacy" compatibility disables old version reporting */ 449 if (compat != NULL && strcmp(compat, ZPOOL_COMPAT_LEGACY) == 0) 450 return (ZPOOL_STATUS_OK); 451 else 452 return (ZPOOL_STATUS_VERSION_OLDER); 453 } 454 455 /* 456 * Usable pool with disabled or superfluous features 457 * (superfluous = beyond what's requested by 'compatibility') 458 */ 459 if (version >= SPA_VERSION_FEATURES) { 460 int i; 461 nvlist_t *feat; 462 463 if (isimport) { 464 feat = fnvlist_lookup_nvlist(config, 465 ZPOOL_CONFIG_LOAD_INFO); 466 if (nvlist_exists(feat, ZPOOL_CONFIG_ENABLED_FEAT)) 467 feat = fnvlist_lookup_nvlist(feat, 468 ZPOOL_CONFIG_ENABLED_FEAT); 469 } else { 470 feat = fnvlist_lookup_nvlist(config, 471 ZPOOL_CONFIG_FEATURE_STATS); 472 } 473 474 /* check against all features, or limited set? */ 475 boolean_t c_features[SPA_FEATURES]; 476 477 switch (zpool_load_compat(compat, c_features, NULL, 0)) { 478 case ZPOOL_COMPATIBILITY_OK: 479 case ZPOOL_COMPATIBILITY_WARNTOKEN: 480 break; 481 default: 482 return (ZPOOL_STATUS_COMPATIBILITY_ERR); 483 } 484 for (i = 0; i < SPA_FEATURES; i++) { 485 zfeature_info_t *fi = &spa_feature_table[i]; 486 if (!fi->fi_zfs_mod_supported) 487 continue; 488 if (c_features[i] && !nvlist_exists(feat, fi->fi_guid)) 489 return (ZPOOL_STATUS_FEAT_DISABLED); 490 if (!c_features[i] && nvlist_exists(feat, fi->fi_guid)) 491 return (ZPOOL_STATUS_INCOMPATIBLE_FEAT); 492 } 493 } 494 495 return (ZPOOL_STATUS_OK); 496 } 497 498 zpool_status_t 499 zpool_get_status(zpool_handle_t *zhp, const char **msgid, 500 zpool_errata_t *errata) 501 { 502 /* 503 * pass in the desired feature set, as 504 * it affects check for disabled features 505 */ 506 char compatibility[ZFS_MAXPROPLEN]; 507 if (zpool_get_prop(zhp, ZPOOL_PROP_COMPATIBILITY, compatibility, 508 ZFS_MAXPROPLEN, NULL, B_FALSE) != 0) 509 compatibility[0] = '\0'; 510 511 zpool_status_t ret = check_status(zhp->zpool_config, B_FALSE, errata, 512 compatibility); 513 514 if (msgid != NULL) { 515 if (ret >= NMSGID) 516 *msgid = NULL; 517 else 518 *msgid = zfs_msgid_table[ret]; 519 } 520 return (ret); 521 } 522 523 zpool_status_t 524 zpool_import_status(nvlist_t *config, const char **msgid, 525 zpool_errata_t *errata) 526 { 527 zpool_status_t ret = check_status(config, B_TRUE, errata, NULL); 528 529 if (ret >= NMSGID) 530 *msgid = NULL; 531 else 532 *msgid = zfs_msgid_table[ret]; 533 534 return (ret); 535 } 536