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 }; 58 59 struct xfs_errortag_attr { 60 struct attribute attr; 61 unsigned int tag; 62 }; 63 64 static inline struct xfs_errortag_attr * 65 to_attr(struct attribute *attr) 66 { 67 return container_of(attr, struct xfs_errortag_attr, attr); 68 } 69 70 static inline struct xfs_mount * 71 to_mp(struct kobject *kobject) 72 { 73 struct xfs_kobj *kobj = to_kobj(kobject); 74 75 return container_of(kobj, struct xfs_mount, m_errortag_kobj); 76 } 77 78 STATIC ssize_t 79 xfs_errortag_attr_store( 80 struct kobject *kobject, 81 struct attribute *attr, 82 const char *buf, 83 size_t count) 84 { 85 struct xfs_mount *mp = to_mp(kobject); 86 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 87 int ret; 88 unsigned int val; 89 90 if (strcmp(buf, "default") == 0) { 91 val = xfs_errortag_random_default[xfs_attr->tag]; 92 } else { 93 ret = kstrtouint(buf, 0, &val); 94 if (ret) 95 return ret; 96 } 97 98 ret = xfs_errortag_set(mp, xfs_attr->tag, val); 99 if (ret) 100 return ret; 101 return count; 102 } 103 104 STATIC ssize_t 105 xfs_errortag_attr_show( 106 struct kobject *kobject, 107 struct attribute *attr, 108 char *buf) 109 { 110 struct xfs_mount *mp = to_mp(kobject); 111 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 112 113 return snprintf(buf, PAGE_SIZE, "%u\n", 114 xfs_errortag_get(mp, xfs_attr->tag)); 115 } 116 117 static const struct sysfs_ops xfs_errortag_sysfs_ops = { 118 .show = xfs_errortag_attr_show, 119 .store = xfs_errortag_attr_store, 120 }; 121 122 #define XFS_ERRORTAG_ATTR_RW(_name, _tag) \ 123 static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \ 124 .attr = {.name = __stringify(_name), \ 125 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \ 126 .tag = (_tag), \ 127 } 128 129 #define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr 130 131 XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR); 132 XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1); 133 XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2); 134 XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3); 135 XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4); 136 XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5); 137 XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6); 138 XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF); 139 XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK); 140 XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK); 141 XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF); 142 XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI); 143 XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP); 144 XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK); 145 XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE); 146 XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE); 147 XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK); 148 XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR); 149 XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR); 150 XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR); 151 XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR); 152 XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT); 153 XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT); 154 XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE); 155 XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE); 156 XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE); 157 XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE); 158 XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL); 159 XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES); 160 XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC); 161 XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN); 162 XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF); 163 XFS_ERRORTAG_ATTR_RW(force_repair, XFS_ERRTAG_FORCE_SCRUB_REPAIR); 164 XFS_ERRORTAG_ATTR_RW(bad_summary, XFS_ERRTAG_FORCE_SUMMARY_RECALC); 165 XFS_ERRORTAG_ATTR_RW(iunlink_fallback, XFS_ERRTAG_IUNLINK_FALLBACK); 166 XFS_ERRORTAG_ATTR_RW(buf_ioerror, XFS_ERRTAG_BUF_IOERROR); 167 168 static struct attribute *xfs_errortag_attrs[] = { 169 XFS_ERRORTAG_ATTR_LIST(noerror), 170 XFS_ERRORTAG_ATTR_LIST(iflush1), 171 XFS_ERRORTAG_ATTR_LIST(iflush2), 172 XFS_ERRORTAG_ATTR_LIST(iflush3), 173 XFS_ERRORTAG_ATTR_LIST(iflush4), 174 XFS_ERRORTAG_ATTR_LIST(iflush5), 175 XFS_ERRORTAG_ATTR_LIST(iflush6), 176 XFS_ERRORTAG_ATTR_LIST(dareadbuf), 177 XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk), 178 XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk), 179 XFS_ERRORTAG_ATTR_LIST(readagf), 180 XFS_ERRORTAG_ATTR_LIST(readagi), 181 XFS_ERRORTAG_ATTR_LIST(itobp), 182 XFS_ERRORTAG_ATTR_LIST(iunlink), 183 XFS_ERRORTAG_ATTR_LIST(iunlinkrm), 184 XFS_ERRORTAG_ATTR_LIST(dirinovalid), 185 XFS_ERRORTAG_ATTR_LIST(bulkstat), 186 XFS_ERRORTAG_ATTR_LIST(logiodone), 187 XFS_ERRORTAG_ATTR_LIST(stratread), 188 XFS_ERRORTAG_ATTR_LIST(stratcmpl), 189 XFS_ERRORTAG_ATTR_LIST(diowrite), 190 XFS_ERRORTAG_ATTR_LIST(bmapifmt), 191 XFS_ERRORTAG_ATTR_LIST(free_extent), 192 XFS_ERRORTAG_ATTR_LIST(rmap_finish_one), 193 XFS_ERRORTAG_ATTR_LIST(refcount_continue_update), 194 XFS_ERRORTAG_ATTR_LIST(refcount_finish_one), 195 XFS_ERRORTAG_ATTR_LIST(bmap_finish_one), 196 XFS_ERRORTAG_ATTR_LIST(ag_resv_critical), 197 XFS_ERRORTAG_ATTR_LIST(drop_writes), 198 XFS_ERRORTAG_ATTR_LIST(log_bad_crc), 199 XFS_ERRORTAG_ATTR_LIST(log_item_pin), 200 XFS_ERRORTAG_ATTR_LIST(buf_lru_ref), 201 XFS_ERRORTAG_ATTR_LIST(force_repair), 202 XFS_ERRORTAG_ATTR_LIST(bad_summary), 203 XFS_ERRORTAG_ATTR_LIST(iunlink_fallback), 204 XFS_ERRORTAG_ATTR_LIST(buf_ioerror), 205 NULL, 206 }; 207 208 static struct kobj_type xfs_errortag_ktype = { 209 .release = xfs_sysfs_release, 210 .sysfs_ops = &xfs_errortag_sysfs_ops, 211 .default_attrs = xfs_errortag_attrs, 212 }; 213 214 int 215 xfs_errortag_init( 216 struct xfs_mount *mp) 217 { 218 mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX, 219 KM_MAYFAIL); 220 if (!mp->m_errortag) 221 return -ENOMEM; 222 223 return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype, 224 &mp->m_kobj, "errortag"); 225 } 226 227 void 228 xfs_errortag_del( 229 struct xfs_mount *mp) 230 { 231 xfs_sysfs_del(&mp->m_errortag_kobj); 232 kmem_free(mp->m_errortag); 233 } 234 235 bool 236 xfs_errortag_test( 237 struct xfs_mount *mp, 238 const char *expression, 239 const char *file, 240 int line, 241 unsigned int error_tag) 242 { 243 unsigned int randfactor; 244 245 /* 246 * To be able to use error injection anywhere, we need to ensure error 247 * injection mechanism is already initialized. 248 * 249 * Code paths like I/O completion can be called before the 250 * initialization is complete, but be able to inject errors in such 251 * places is still useful. 252 */ 253 if (!mp->m_errortag) 254 return false; 255 256 ASSERT(error_tag < XFS_ERRTAG_MAX); 257 randfactor = mp->m_errortag[error_tag]; 258 if (!randfactor || prandom_u32() % randfactor) 259 return false; 260 261 xfs_warn_ratelimited(mp, 262 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"", 263 expression, file, line, mp->m_super->s_id); 264 return true; 265 } 266 267 int 268 xfs_errortag_get( 269 struct xfs_mount *mp, 270 unsigned int error_tag) 271 { 272 if (error_tag >= XFS_ERRTAG_MAX) 273 return -EINVAL; 274 275 return mp->m_errortag[error_tag]; 276 } 277 278 int 279 xfs_errortag_set( 280 struct xfs_mount *mp, 281 unsigned int error_tag, 282 unsigned int tag_value) 283 { 284 if (error_tag >= XFS_ERRTAG_MAX) 285 return -EINVAL; 286 287 mp->m_errortag[error_tag] = tag_value; 288 return 0; 289 } 290 291 int 292 xfs_errortag_add( 293 struct xfs_mount *mp, 294 unsigned int error_tag) 295 { 296 if (error_tag >= XFS_ERRTAG_MAX) 297 return -EINVAL; 298 299 return xfs_errortag_set(mp, error_tag, 300 xfs_errortag_random_default[error_tag]); 301 } 302 303 int 304 xfs_errortag_clearall( 305 struct xfs_mount *mp) 306 { 307 memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX); 308 return 0; 309 } 310 #endif /* DEBUG */ 311 312 void 313 xfs_error_report( 314 const char *tag, 315 int level, 316 struct xfs_mount *mp, 317 const char *filename, 318 int linenum, 319 xfs_failaddr_t failaddr) 320 { 321 if (level <= xfs_error_level) { 322 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT, 323 "Internal error %s at line %d of file %s. Caller %pS", 324 tag, linenum, filename, failaddr); 325 326 xfs_stack_trace(); 327 } 328 } 329 330 void 331 xfs_corruption_error( 332 const char *tag, 333 int level, 334 struct xfs_mount *mp, 335 const void *buf, 336 size_t bufsize, 337 const char *filename, 338 int linenum, 339 xfs_failaddr_t failaddr) 340 { 341 if (buf && level <= xfs_error_level) 342 xfs_hex_dump(buf, bufsize); 343 xfs_error_report(tag, level, mp, filename, linenum, failaddr); 344 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair"); 345 } 346 347 /* 348 * Complain about the kinds of metadata corruption that we can't detect from a 349 * verifier, such as incorrect inter-block relationship data. Does not set 350 * bp->b_error. 351 * 352 * Call xfs_buf_mark_corrupt, not this function. 353 */ 354 void 355 xfs_buf_corruption_error( 356 struct xfs_buf *bp, 357 xfs_failaddr_t fa) 358 { 359 struct xfs_mount *mp = bp->b_mount; 360 361 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, 362 "Metadata corruption detected at %pS, %s block 0x%llx", 363 fa, bp->b_ops->name, bp->b_bn); 364 365 xfs_alert(mp, "Unmount and run xfs_repair"); 366 367 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 368 xfs_stack_trace(); 369 } 370 371 /* 372 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 373 * values, and omit the stack trace unless the error level is tuned high. 374 */ 375 void 376 xfs_buf_verifier_error( 377 struct xfs_buf *bp, 378 int error, 379 const char *name, 380 const void *buf, 381 size_t bufsz, 382 xfs_failaddr_t failaddr) 383 { 384 struct xfs_mount *mp = bp->b_mount; 385 xfs_failaddr_t fa; 386 int sz; 387 388 fa = failaddr ? failaddr : __return_address; 389 __xfs_buf_ioerror(bp, error, fa); 390 391 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, 392 "Metadata %s detected at %pS, %s block 0x%llx %s", 393 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption", 394 fa, bp->b_ops->name, bp->b_bn, name); 395 396 xfs_alert(mp, "Unmount and run xfs_repair"); 397 398 if (xfs_error_level >= XFS_ERRLEVEL_LOW) { 399 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 400 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 401 sz); 402 xfs_hex_dump(buf, sz); 403 } 404 405 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 406 xfs_stack_trace(); 407 } 408 409 /* 410 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 411 * values, and omit the stack trace unless the error level is tuned high. 412 */ 413 void 414 xfs_verifier_error( 415 struct xfs_buf *bp, 416 int error, 417 xfs_failaddr_t failaddr) 418 { 419 return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0), 420 XFS_CORRUPTION_DUMP_LEN, failaddr); 421 } 422 423 /* 424 * Warnings for inode corruption problems. Don't bother with the stack 425 * trace unless the error level is turned up high. 426 */ 427 void 428 xfs_inode_verifier_error( 429 struct xfs_inode *ip, 430 int error, 431 const char *name, 432 const void *buf, 433 size_t bufsz, 434 xfs_failaddr_t failaddr) 435 { 436 struct xfs_mount *mp = ip->i_mount; 437 xfs_failaddr_t fa; 438 int sz; 439 440 fa = failaddr ? failaddr : __return_address; 441 442 xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s", 443 error == -EFSBADCRC ? "CRC error" : "corruption", 444 fa, ip->i_ino, name); 445 446 xfs_alert(mp, "Unmount and run xfs_repair"); 447 448 if (buf && xfs_error_level >= XFS_ERRLEVEL_LOW) { 449 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 450 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 451 sz); 452 xfs_hex_dump(buf, sz); 453 } 454 455 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 456 xfs_stack_trace(); 457 } 458