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 }; 57 58 struct xfs_errortag_attr { 59 struct attribute attr; 60 unsigned int tag; 61 }; 62 63 static inline struct xfs_errortag_attr * 64 to_attr(struct attribute *attr) 65 { 66 return container_of(attr, struct xfs_errortag_attr, attr); 67 } 68 69 static inline struct xfs_mount * 70 to_mp(struct kobject *kobject) 71 { 72 struct xfs_kobj *kobj = to_kobj(kobject); 73 74 return container_of(kobj, struct xfs_mount, m_errortag_kobj); 75 } 76 77 STATIC ssize_t 78 xfs_errortag_attr_store( 79 struct kobject *kobject, 80 struct attribute *attr, 81 const char *buf, 82 size_t count) 83 { 84 struct xfs_mount *mp = to_mp(kobject); 85 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 86 int ret; 87 unsigned int val; 88 89 if (strcmp(buf, "default") == 0) { 90 val = xfs_errortag_random_default[xfs_attr->tag]; 91 } else { 92 ret = kstrtouint(buf, 0, &val); 93 if (ret) 94 return ret; 95 } 96 97 ret = xfs_errortag_set(mp, xfs_attr->tag, val); 98 if (ret) 99 return ret; 100 return count; 101 } 102 103 STATIC ssize_t 104 xfs_errortag_attr_show( 105 struct kobject *kobject, 106 struct attribute *attr, 107 char *buf) 108 { 109 struct xfs_mount *mp = to_mp(kobject); 110 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 111 112 return snprintf(buf, PAGE_SIZE, "%u\n", 113 xfs_errortag_get(mp, xfs_attr->tag)); 114 } 115 116 static const struct sysfs_ops xfs_errortag_sysfs_ops = { 117 .show = xfs_errortag_attr_show, 118 .store = xfs_errortag_attr_store, 119 }; 120 121 #define XFS_ERRORTAG_ATTR_RW(_name, _tag) \ 122 static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \ 123 .attr = {.name = __stringify(_name), \ 124 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \ 125 .tag = (_tag), \ 126 } 127 128 #define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr 129 130 XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR); 131 XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1); 132 XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2); 133 XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3); 134 XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4); 135 XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5); 136 XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6); 137 XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF); 138 XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK); 139 XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK); 140 XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF); 141 XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI); 142 XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP); 143 XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK); 144 XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE); 145 XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE); 146 XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK); 147 XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR); 148 XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR); 149 XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR); 150 XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR); 151 XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT); 152 XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT); 153 XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE); 154 XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE); 155 XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE); 156 XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE); 157 XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL); 158 XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES); 159 XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC); 160 XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN); 161 XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF); 162 XFS_ERRORTAG_ATTR_RW(force_repair, XFS_ERRTAG_FORCE_SCRUB_REPAIR); 163 XFS_ERRORTAG_ATTR_RW(bad_summary, XFS_ERRTAG_FORCE_SUMMARY_RECALC); 164 XFS_ERRORTAG_ATTR_RW(iunlink_fallback, XFS_ERRTAG_IUNLINK_FALLBACK); 165 166 static struct attribute *xfs_errortag_attrs[] = { 167 XFS_ERRORTAG_ATTR_LIST(noerror), 168 XFS_ERRORTAG_ATTR_LIST(iflush1), 169 XFS_ERRORTAG_ATTR_LIST(iflush2), 170 XFS_ERRORTAG_ATTR_LIST(iflush3), 171 XFS_ERRORTAG_ATTR_LIST(iflush4), 172 XFS_ERRORTAG_ATTR_LIST(iflush5), 173 XFS_ERRORTAG_ATTR_LIST(iflush6), 174 XFS_ERRORTAG_ATTR_LIST(dareadbuf), 175 XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk), 176 XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk), 177 XFS_ERRORTAG_ATTR_LIST(readagf), 178 XFS_ERRORTAG_ATTR_LIST(readagi), 179 XFS_ERRORTAG_ATTR_LIST(itobp), 180 XFS_ERRORTAG_ATTR_LIST(iunlink), 181 XFS_ERRORTAG_ATTR_LIST(iunlinkrm), 182 XFS_ERRORTAG_ATTR_LIST(dirinovalid), 183 XFS_ERRORTAG_ATTR_LIST(bulkstat), 184 XFS_ERRORTAG_ATTR_LIST(logiodone), 185 XFS_ERRORTAG_ATTR_LIST(stratread), 186 XFS_ERRORTAG_ATTR_LIST(stratcmpl), 187 XFS_ERRORTAG_ATTR_LIST(diowrite), 188 XFS_ERRORTAG_ATTR_LIST(bmapifmt), 189 XFS_ERRORTAG_ATTR_LIST(free_extent), 190 XFS_ERRORTAG_ATTR_LIST(rmap_finish_one), 191 XFS_ERRORTAG_ATTR_LIST(refcount_continue_update), 192 XFS_ERRORTAG_ATTR_LIST(refcount_finish_one), 193 XFS_ERRORTAG_ATTR_LIST(bmap_finish_one), 194 XFS_ERRORTAG_ATTR_LIST(ag_resv_critical), 195 XFS_ERRORTAG_ATTR_LIST(drop_writes), 196 XFS_ERRORTAG_ATTR_LIST(log_bad_crc), 197 XFS_ERRORTAG_ATTR_LIST(log_item_pin), 198 XFS_ERRORTAG_ATTR_LIST(buf_lru_ref), 199 XFS_ERRORTAG_ATTR_LIST(force_repair), 200 XFS_ERRORTAG_ATTR_LIST(bad_summary), 201 XFS_ERRORTAG_ATTR_LIST(iunlink_fallback), 202 NULL, 203 }; 204 205 static struct kobj_type xfs_errortag_ktype = { 206 .release = xfs_sysfs_release, 207 .sysfs_ops = &xfs_errortag_sysfs_ops, 208 .default_attrs = xfs_errortag_attrs, 209 }; 210 211 int 212 xfs_errortag_init( 213 struct xfs_mount *mp) 214 { 215 mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX, 216 KM_MAYFAIL); 217 if (!mp->m_errortag) 218 return -ENOMEM; 219 220 return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype, 221 &mp->m_kobj, "errortag"); 222 } 223 224 void 225 xfs_errortag_del( 226 struct xfs_mount *mp) 227 { 228 xfs_sysfs_del(&mp->m_errortag_kobj); 229 kmem_free(mp->m_errortag); 230 } 231 232 bool 233 xfs_errortag_test( 234 struct xfs_mount *mp, 235 const char *expression, 236 const char *file, 237 int line, 238 unsigned int error_tag) 239 { 240 unsigned int randfactor; 241 242 /* 243 * To be able to use error injection anywhere, we need to ensure error 244 * injection mechanism is already initialized. 245 * 246 * Code paths like I/O completion can be called before the 247 * initialization is complete, but be able to inject errors in such 248 * places is still useful. 249 */ 250 if (!mp->m_errortag) 251 return false; 252 253 ASSERT(error_tag < XFS_ERRTAG_MAX); 254 randfactor = mp->m_errortag[error_tag]; 255 if (!randfactor || prandom_u32() % randfactor) 256 return false; 257 258 xfs_warn_ratelimited(mp, 259 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"", 260 expression, file, line, mp->m_super->s_id); 261 return true; 262 } 263 264 int 265 xfs_errortag_get( 266 struct xfs_mount *mp, 267 unsigned int error_tag) 268 { 269 if (error_tag >= XFS_ERRTAG_MAX) 270 return -EINVAL; 271 272 return mp->m_errortag[error_tag]; 273 } 274 275 int 276 xfs_errortag_set( 277 struct xfs_mount *mp, 278 unsigned int error_tag, 279 unsigned int tag_value) 280 { 281 if (error_tag >= XFS_ERRTAG_MAX) 282 return -EINVAL; 283 284 mp->m_errortag[error_tag] = tag_value; 285 return 0; 286 } 287 288 int 289 xfs_errortag_add( 290 struct xfs_mount *mp, 291 unsigned int error_tag) 292 { 293 if (error_tag >= XFS_ERRTAG_MAX) 294 return -EINVAL; 295 296 return xfs_errortag_set(mp, error_tag, 297 xfs_errortag_random_default[error_tag]); 298 } 299 300 int 301 xfs_errortag_clearall( 302 struct xfs_mount *mp) 303 { 304 memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX); 305 return 0; 306 } 307 #endif /* DEBUG */ 308 309 void 310 xfs_error_report( 311 const char *tag, 312 int level, 313 struct xfs_mount *mp, 314 const char *filename, 315 int linenum, 316 xfs_failaddr_t failaddr) 317 { 318 if (level <= xfs_error_level) { 319 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT, 320 "Internal error %s at line %d of file %s. Caller %pS", 321 tag, linenum, filename, failaddr); 322 323 xfs_stack_trace(); 324 } 325 } 326 327 void 328 xfs_corruption_error( 329 const char *tag, 330 int level, 331 struct xfs_mount *mp, 332 const void *buf, 333 size_t bufsize, 334 const char *filename, 335 int linenum, 336 xfs_failaddr_t failaddr) 337 { 338 if (buf && level <= xfs_error_level) 339 xfs_hex_dump(buf, bufsize); 340 xfs_error_report(tag, level, mp, filename, linenum, failaddr); 341 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair"); 342 } 343 344 /* 345 * Complain about the kinds of metadata corruption that we can't detect from a 346 * verifier, such as incorrect inter-block relationship data. Does not set 347 * bp->b_error. 348 */ 349 void 350 xfs_buf_corruption_error( 351 struct xfs_buf *bp) 352 { 353 struct xfs_mount *mp = bp->b_mount; 354 355 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, 356 "Metadata corruption detected at %pS, %s block 0x%llx", 357 __return_address, bp->b_ops->name, bp->b_bn); 358 359 xfs_alert(mp, "Unmount and run xfs_repair"); 360 361 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 362 xfs_stack_trace(); 363 } 364 365 /* 366 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 367 * values, and omit the stack trace unless the error level is tuned high. 368 */ 369 void 370 xfs_buf_verifier_error( 371 struct xfs_buf *bp, 372 int error, 373 const char *name, 374 const void *buf, 375 size_t bufsz, 376 xfs_failaddr_t failaddr) 377 { 378 struct xfs_mount *mp = bp->b_mount; 379 xfs_failaddr_t fa; 380 int sz; 381 382 fa = failaddr ? failaddr : __return_address; 383 __xfs_buf_ioerror(bp, error, fa); 384 385 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, 386 "Metadata %s detected at %pS, %s block 0x%llx %s", 387 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption", 388 fa, bp->b_ops->name, bp->b_bn, name); 389 390 xfs_alert(mp, "Unmount and run xfs_repair"); 391 392 if (xfs_error_level >= XFS_ERRLEVEL_LOW) { 393 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 394 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 395 sz); 396 xfs_hex_dump(buf, sz); 397 } 398 399 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 400 xfs_stack_trace(); 401 } 402 403 /* 404 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 405 * values, and omit the stack trace unless the error level is tuned high. 406 */ 407 void 408 xfs_verifier_error( 409 struct xfs_buf *bp, 410 int error, 411 xfs_failaddr_t failaddr) 412 { 413 return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0), 414 XFS_CORRUPTION_DUMP_LEN, failaddr); 415 } 416 417 /* 418 * Warnings for inode corruption problems. Don't bother with the stack 419 * trace unless the error level is turned up high. 420 */ 421 void 422 xfs_inode_verifier_error( 423 struct xfs_inode *ip, 424 int error, 425 const char *name, 426 const void *buf, 427 size_t bufsz, 428 xfs_failaddr_t failaddr) 429 { 430 struct xfs_mount *mp = ip->i_mount; 431 xfs_failaddr_t fa; 432 int sz; 433 434 fa = failaddr ? failaddr : __return_address; 435 436 xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s", 437 error == -EFSBADCRC ? "CRC error" : "corruption", 438 fa, ip->i_ino, name); 439 440 xfs_alert(mp, "Unmount and run xfs_repair"); 441 442 if (buf && xfs_error_level >= XFS_ERRLEVEL_LOW) { 443 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 444 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 445 sz); 446 xfs_hex_dump(buf, sz); 447 } 448 449 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 450 xfs_stack_trace(); 451 } 452