1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 #include "xfs_shared.h" 8 #include "xfs_format.h" 9 #include "xfs_fs.h" 10 #include "xfs_log_format.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_mount.h" 13 #include "xfs_errortag.h" 14 #include "xfs_error.h" 15 #include "xfs_sysfs.h" 16 #include "xfs_inode.h" 17 18 #ifdef DEBUG 19 20 static unsigned int xfs_errortag_random_default[] = { 21 XFS_RANDOM_DEFAULT, 22 XFS_RANDOM_IFLUSH_1, 23 XFS_RANDOM_IFLUSH_2, 24 XFS_RANDOM_IFLUSH_3, 25 XFS_RANDOM_IFLUSH_4, 26 XFS_RANDOM_IFLUSH_5, 27 XFS_RANDOM_IFLUSH_6, 28 XFS_RANDOM_DA_READ_BUF, 29 XFS_RANDOM_BTREE_CHECK_LBLOCK, 30 XFS_RANDOM_BTREE_CHECK_SBLOCK, 31 XFS_RANDOM_ALLOC_READ_AGF, 32 XFS_RANDOM_IALLOC_READ_AGI, 33 XFS_RANDOM_ITOBP_INOTOBP, 34 XFS_RANDOM_IUNLINK, 35 XFS_RANDOM_IUNLINK_REMOVE, 36 XFS_RANDOM_DIR_INO_VALIDATE, 37 XFS_RANDOM_BULKSTAT_READ_CHUNK, 38 XFS_RANDOM_IODONE_IOERR, 39 XFS_RANDOM_STRATREAD_IOERR, 40 XFS_RANDOM_STRATCMPL_IOERR, 41 XFS_RANDOM_DIOWRITE_IOERR, 42 XFS_RANDOM_BMAPIFORMAT, 43 XFS_RANDOM_FREE_EXTENT, 44 XFS_RANDOM_RMAP_FINISH_ONE, 45 XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE, 46 XFS_RANDOM_REFCOUNT_FINISH_ONE, 47 XFS_RANDOM_BMAP_FINISH_ONE, 48 XFS_RANDOM_AG_RESV_CRITICAL, 49 XFS_RANDOM_DROP_WRITES, 50 XFS_RANDOM_LOG_BAD_CRC, 51 XFS_RANDOM_LOG_ITEM_PIN, 52 XFS_RANDOM_BUF_LRU_REF, 53 XFS_RANDOM_FORCE_SCRUB_REPAIR, 54 XFS_RANDOM_FORCE_SUMMARY_RECALC, 55 XFS_RANDOM_IUNLINK_FALLBACK, 56 XFS_RANDOM_BUF_IOERROR, 57 XFS_RANDOM_REDUCE_MAX_IEXTENTS, 58 XFS_RANDOM_BMAP_ALLOC_MINLEN_EXTENT, 59 XFS_RANDOM_AG_RESV_FAIL, 60 XFS_RANDOM_LARP, 61 XFS_RANDOM_DA_LEAF_SPLIT, 62 XFS_RANDOM_ATTR_LEAF_TO_NODE, 63 }; 64 65 struct xfs_errortag_attr { 66 struct attribute attr; 67 unsigned int tag; 68 }; 69 70 static inline struct xfs_errortag_attr * 71 to_attr(struct attribute *attr) 72 { 73 return container_of(attr, struct xfs_errortag_attr, attr); 74 } 75 76 static inline struct xfs_mount * 77 to_mp(struct kobject *kobject) 78 { 79 struct xfs_kobj *kobj = to_kobj(kobject); 80 81 return container_of(kobj, struct xfs_mount, m_errortag_kobj); 82 } 83 84 STATIC ssize_t 85 xfs_errortag_attr_store( 86 struct kobject *kobject, 87 struct attribute *attr, 88 const char *buf, 89 size_t count) 90 { 91 struct xfs_mount *mp = to_mp(kobject); 92 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 93 int ret; 94 unsigned int val; 95 96 if (strcmp(buf, "default") == 0) { 97 val = xfs_errortag_random_default[xfs_attr->tag]; 98 } else { 99 ret = kstrtouint(buf, 0, &val); 100 if (ret) 101 return ret; 102 } 103 104 ret = xfs_errortag_set(mp, xfs_attr->tag, val); 105 if (ret) 106 return ret; 107 return count; 108 } 109 110 STATIC ssize_t 111 xfs_errortag_attr_show( 112 struct kobject *kobject, 113 struct attribute *attr, 114 char *buf) 115 { 116 struct xfs_mount *mp = to_mp(kobject); 117 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 118 119 return snprintf(buf, PAGE_SIZE, "%u\n", 120 xfs_errortag_get(mp, xfs_attr->tag)); 121 } 122 123 static const struct sysfs_ops xfs_errortag_sysfs_ops = { 124 .show = xfs_errortag_attr_show, 125 .store = xfs_errortag_attr_store, 126 }; 127 128 #define XFS_ERRORTAG_ATTR_RW(_name, _tag) \ 129 static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \ 130 .attr = {.name = __stringify(_name), \ 131 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \ 132 .tag = (_tag), \ 133 } 134 135 #define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr 136 137 XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR); 138 XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1); 139 XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2); 140 XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3); 141 XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4); 142 XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5); 143 XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6); 144 XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF); 145 XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK); 146 XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK); 147 XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF); 148 XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI); 149 XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP); 150 XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK); 151 XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE); 152 XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE); 153 XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK); 154 XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR); 155 XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR); 156 XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR); 157 XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR); 158 XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT); 159 XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT); 160 XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE); 161 XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE); 162 XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE); 163 XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE); 164 XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL); 165 XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES); 166 XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC); 167 XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN); 168 XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF); 169 XFS_ERRORTAG_ATTR_RW(force_repair, XFS_ERRTAG_FORCE_SCRUB_REPAIR); 170 XFS_ERRORTAG_ATTR_RW(bad_summary, XFS_ERRTAG_FORCE_SUMMARY_RECALC); 171 XFS_ERRORTAG_ATTR_RW(iunlink_fallback, XFS_ERRTAG_IUNLINK_FALLBACK); 172 XFS_ERRORTAG_ATTR_RW(buf_ioerror, XFS_ERRTAG_BUF_IOERROR); 173 XFS_ERRORTAG_ATTR_RW(reduce_max_iextents, XFS_ERRTAG_REDUCE_MAX_IEXTENTS); 174 XFS_ERRORTAG_ATTR_RW(bmap_alloc_minlen_extent, XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT); 175 XFS_ERRORTAG_ATTR_RW(ag_resv_fail, XFS_ERRTAG_AG_RESV_FAIL); 176 XFS_ERRORTAG_ATTR_RW(larp, XFS_ERRTAG_LARP); 177 XFS_ERRORTAG_ATTR_RW(da_leaf_split, XFS_ERRTAG_DA_LEAF_SPLIT); 178 XFS_ERRORTAG_ATTR_RW(attr_leaf_to_node, XFS_ERRTAG_ATTR_LEAF_TO_NODE); 179 180 static struct attribute *xfs_errortag_attrs[] = { 181 XFS_ERRORTAG_ATTR_LIST(noerror), 182 XFS_ERRORTAG_ATTR_LIST(iflush1), 183 XFS_ERRORTAG_ATTR_LIST(iflush2), 184 XFS_ERRORTAG_ATTR_LIST(iflush3), 185 XFS_ERRORTAG_ATTR_LIST(iflush4), 186 XFS_ERRORTAG_ATTR_LIST(iflush5), 187 XFS_ERRORTAG_ATTR_LIST(iflush6), 188 XFS_ERRORTAG_ATTR_LIST(dareadbuf), 189 XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk), 190 XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk), 191 XFS_ERRORTAG_ATTR_LIST(readagf), 192 XFS_ERRORTAG_ATTR_LIST(readagi), 193 XFS_ERRORTAG_ATTR_LIST(itobp), 194 XFS_ERRORTAG_ATTR_LIST(iunlink), 195 XFS_ERRORTAG_ATTR_LIST(iunlinkrm), 196 XFS_ERRORTAG_ATTR_LIST(dirinovalid), 197 XFS_ERRORTAG_ATTR_LIST(bulkstat), 198 XFS_ERRORTAG_ATTR_LIST(logiodone), 199 XFS_ERRORTAG_ATTR_LIST(stratread), 200 XFS_ERRORTAG_ATTR_LIST(stratcmpl), 201 XFS_ERRORTAG_ATTR_LIST(diowrite), 202 XFS_ERRORTAG_ATTR_LIST(bmapifmt), 203 XFS_ERRORTAG_ATTR_LIST(free_extent), 204 XFS_ERRORTAG_ATTR_LIST(rmap_finish_one), 205 XFS_ERRORTAG_ATTR_LIST(refcount_continue_update), 206 XFS_ERRORTAG_ATTR_LIST(refcount_finish_one), 207 XFS_ERRORTAG_ATTR_LIST(bmap_finish_one), 208 XFS_ERRORTAG_ATTR_LIST(ag_resv_critical), 209 XFS_ERRORTAG_ATTR_LIST(drop_writes), 210 XFS_ERRORTAG_ATTR_LIST(log_bad_crc), 211 XFS_ERRORTAG_ATTR_LIST(log_item_pin), 212 XFS_ERRORTAG_ATTR_LIST(buf_lru_ref), 213 XFS_ERRORTAG_ATTR_LIST(force_repair), 214 XFS_ERRORTAG_ATTR_LIST(bad_summary), 215 XFS_ERRORTAG_ATTR_LIST(iunlink_fallback), 216 XFS_ERRORTAG_ATTR_LIST(buf_ioerror), 217 XFS_ERRORTAG_ATTR_LIST(reduce_max_iextents), 218 XFS_ERRORTAG_ATTR_LIST(bmap_alloc_minlen_extent), 219 XFS_ERRORTAG_ATTR_LIST(ag_resv_fail), 220 XFS_ERRORTAG_ATTR_LIST(larp), 221 XFS_ERRORTAG_ATTR_LIST(da_leaf_split), 222 XFS_ERRORTAG_ATTR_LIST(attr_leaf_to_node), 223 NULL, 224 }; 225 ATTRIBUTE_GROUPS(xfs_errortag); 226 227 static struct kobj_type xfs_errortag_ktype = { 228 .release = xfs_sysfs_release, 229 .sysfs_ops = &xfs_errortag_sysfs_ops, 230 .default_groups = xfs_errortag_groups, 231 }; 232 233 int 234 xfs_errortag_init( 235 struct xfs_mount *mp) 236 { 237 int ret; 238 239 mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX, 240 KM_MAYFAIL); 241 if (!mp->m_errortag) 242 return -ENOMEM; 243 244 ret = xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype, 245 &mp->m_kobj, "errortag"); 246 if (ret) 247 kmem_free(mp->m_errortag); 248 return ret; 249 } 250 251 void 252 xfs_errortag_del( 253 struct xfs_mount *mp) 254 { 255 xfs_sysfs_del(&mp->m_errortag_kobj); 256 kmem_free(mp->m_errortag); 257 } 258 259 bool 260 xfs_errortag_test( 261 struct xfs_mount *mp, 262 const char *expression, 263 const char *file, 264 int line, 265 unsigned int error_tag) 266 { 267 unsigned int randfactor; 268 269 /* 270 * To be able to use error injection anywhere, we need to ensure error 271 * injection mechanism is already initialized. 272 * 273 * Code paths like I/O completion can be called before the 274 * initialization is complete, but be able to inject errors in such 275 * places is still useful. 276 */ 277 if (!mp->m_errortag) 278 return false; 279 280 ASSERT(error_tag < XFS_ERRTAG_MAX); 281 randfactor = mp->m_errortag[error_tag]; 282 if (!randfactor || prandom_u32_max(randfactor)) 283 return false; 284 285 xfs_warn_ratelimited(mp, 286 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"", 287 expression, file, line, mp->m_super->s_id); 288 return true; 289 } 290 291 int 292 xfs_errortag_get( 293 struct xfs_mount *mp, 294 unsigned int error_tag) 295 { 296 if (error_tag >= XFS_ERRTAG_MAX) 297 return -EINVAL; 298 299 return mp->m_errortag[error_tag]; 300 } 301 302 int 303 xfs_errortag_set( 304 struct xfs_mount *mp, 305 unsigned int error_tag, 306 unsigned int tag_value) 307 { 308 if (error_tag >= XFS_ERRTAG_MAX) 309 return -EINVAL; 310 311 mp->m_errortag[error_tag] = tag_value; 312 return 0; 313 } 314 315 int 316 xfs_errortag_add( 317 struct xfs_mount *mp, 318 unsigned int error_tag) 319 { 320 BUILD_BUG_ON(ARRAY_SIZE(xfs_errortag_random_default) != XFS_ERRTAG_MAX); 321 322 if (error_tag >= XFS_ERRTAG_MAX) 323 return -EINVAL; 324 325 return xfs_errortag_set(mp, error_tag, 326 xfs_errortag_random_default[error_tag]); 327 } 328 329 int 330 xfs_errortag_clearall( 331 struct xfs_mount *mp) 332 { 333 memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX); 334 return 0; 335 } 336 #endif /* DEBUG */ 337 338 void 339 xfs_error_report( 340 const char *tag, 341 int level, 342 struct xfs_mount *mp, 343 const char *filename, 344 int linenum, 345 xfs_failaddr_t failaddr) 346 { 347 if (level <= xfs_error_level) { 348 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT, 349 "Internal error %s at line %d of file %s. Caller %pS", 350 tag, linenum, filename, failaddr); 351 352 xfs_stack_trace(); 353 } 354 } 355 356 void 357 xfs_corruption_error( 358 const char *tag, 359 int level, 360 struct xfs_mount *mp, 361 const void *buf, 362 size_t bufsize, 363 const char *filename, 364 int linenum, 365 xfs_failaddr_t failaddr) 366 { 367 if (buf && level <= xfs_error_level) 368 xfs_hex_dump(buf, bufsize); 369 xfs_error_report(tag, level, mp, filename, linenum, failaddr); 370 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair"); 371 } 372 373 /* 374 * Complain about the kinds of metadata corruption that we can't detect from a 375 * verifier, such as incorrect inter-block relationship data. Does not set 376 * bp->b_error. 377 * 378 * Call xfs_buf_mark_corrupt, not this function. 379 */ 380 void 381 xfs_buf_corruption_error( 382 struct xfs_buf *bp, 383 xfs_failaddr_t fa) 384 { 385 struct xfs_mount *mp = bp->b_mount; 386 387 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, 388 "Metadata corruption detected at %pS, %s block 0x%llx", 389 fa, bp->b_ops->name, xfs_buf_daddr(bp)); 390 391 xfs_alert(mp, "Unmount and run xfs_repair"); 392 393 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 394 xfs_stack_trace(); 395 } 396 397 /* 398 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 399 * values, and omit the stack trace unless the error level is tuned high. 400 */ 401 void 402 xfs_buf_verifier_error( 403 struct xfs_buf *bp, 404 int error, 405 const char *name, 406 const void *buf, 407 size_t bufsz, 408 xfs_failaddr_t failaddr) 409 { 410 struct xfs_mount *mp = bp->b_mount; 411 xfs_failaddr_t fa; 412 int sz; 413 414 fa = failaddr ? failaddr : __return_address; 415 __xfs_buf_ioerror(bp, error, fa); 416 417 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, 418 "Metadata %s detected at %pS, %s block 0x%llx %s", 419 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption", 420 fa, bp->b_ops->name, xfs_buf_daddr(bp), name); 421 422 xfs_alert(mp, "Unmount and run xfs_repair"); 423 424 if (xfs_error_level >= XFS_ERRLEVEL_LOW) { 425 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 426 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 427 sz); 428 xfs_hex_dump(buf, sz); 429 } 430 431 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 432 xfs_stack_trace(); 433 } 434 435 /* 436 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 437 * values, and omit the stack trace unless the error level is tuned high. 438 */ 439 void 440 xfs_verifier_error( 441 struct xfs_buf *bp, 442 int error, 443 xfs_failaddr_t failaddr) 444 { 445 return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0), 446 XFS_CORRUPTION_DUMP_LEN, failaddr); 447 } 448 449 /* 450 * Warnings for inode corruption problems. Don't bother with the stack 451 * trace unless the error level is turned up high. 452 */ 453 void 454 xfs_inode_verifier_error( 455 struct xfs_inode *ip, 456 int error, 457 const char *name, 458 const void *buf, 459 size_t bufsz, 460 xfs_failaddr_t failaddr) 461 { 462 struct xfs_mount *mp = ip->i_mount; 463 xfs_failaddr_t fa; 464 int sz; 465 466 fa = failaddr ? failaddr : __return_address; 467 468 xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s", 469 error == -EFSBADCRC ? "CRC error" : "corruption", 470 fa, ip->i_ino, name); 471 472 xfs_alert(mp, "Unmount and run xfs_repair"); 473 474 if (buf && xfs_error_level >= XFS_ERRLEVEL_LOW) { 475 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 476 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 477 sz); 478 xfs_hex_dump(buf, sz); 479 } 480 481 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 482 xfs_stack_trace(); 483 } 484