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_format.h" 8 #include "xfs_fs.h" 9 #include "xfs_log_format.h" 10 #include "xfs_trans_resv.h" 11 #include "xfs_mount.h" 12 #include "xfs_errortag.h" 13 #include "xfs_error.h" 14 #include "xfs_sysfs.h" 15 #include "xfs_inode.h" 16 17 #ifdef DEBUG 18 19 static unsigned int xfs_errortag_random_default[] = { 20 XFS_RANDOM_DEFAULT, 21 XFS_RANDOM_IFLUSH_1, 22 XFS_RANDOM_IFLUSH_2, 23 XFS_RANDOM_IFLUSH_3, 24 XFS_RANDOM_IFLUSH_4, 25 XFS_RANDOM_IFLUSH_5, 26 XFS_RANDOM_IFLUSH_6, 27 XFS_RANDOM_DA_READ_BUF, 28 XFS_RANDOM_BTREE_CHECK_LBLOCK, 29 XFS_RANDOM_BTREE_CHECK_SBLOCK, 30 XFS_RANDOM_ALLOC_READ_AGF, 31 XFS_RANDOM_IALLOC_READ_AGI, 32 XFS_RANDOM_ITOBP_INOTOBP, 33 XFS_RANDOM_IUNLINK, 34 XFS_RANDOM_IUNLINK_REMOVE, 35 XFS_RANDOM_DIR_INO_VALIDATE, 36 XFS_RANDOM_BULKSTAT_READ_CHUNK, 37 XFS_RANDOM_IODONE_IOERR, 38 XFS_RANDOM_STRATREAD_IOERR, 39 XFS_RANDOM_STRATCMPL_IOERR, 40 XFS_RANDOM_DIOWRITE_IOERR, 41 XFS_RANDOM_BMAPIFORMAT, 42 XFS_RANDOM_FREE_EXTENT, 43 XFS_RANDOM_RMAP_FINISH_ONE, 44 XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE, 45 XFS_RANDOM_REFCOUNT_FINISH_ONE, 46 XFS_RANDOM_BMAP_FINISH_ONE, 47 XFS_RANDOM_AG_RESV_CRITICAL, 48 XFS_RANDOM_DROP_WRITES, 49 XFS_RANDOM_LOG_BAD_CRC, 50 XFS_RANDOM_LOG_ITEM_PIN, 51 XFS_RANDOM_BUF_LRU_REF, 52 XFS_RANDOM_FORCE_SCRUB_REPAIR, 53 XFS_RANDOM_FORCE_SUMMARY_RECALC, 54 }; 55 56 struct xfs_errortag_attr { 57 struct attribute attr; 58 unsigned int tag; 59 }; 60 61 static inline struct xfs_errortag_attr * 62 to_attr(struct attribute *attr) 63 { 64 return container_of(attr, struct xfs_errortag_attr, attr); 65 } 66 67 static inline struct xfs_mount * 68 to_mp(struct kobject *kobject) 69 { 70 struct xfs_kobj *kobj = to_kobj(kobject); 71 72 return container_of(kobj, struct xfs_mount, m_errortag_kobj); 73 } 74 75 STATIC ssize_t 76 xfs_errortag_attr_store( 77 struct kobject *kobject, 78 struct attribute *attr, 79 const char *buf, 80 size_t count) 81 { 82 struct xfs_mount *mp = to_mp(kobject); 83 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 84 int ret; 85 unsigned int val; 86 87 if (strcmp(buf, "default") == 0) { 88 val = xfs_errortag_random_default[xfs_attr->tag]; 89 } else { 90 ret = kstrtouint(buf, 0, &val); 91 if (ret) 92 return ret; 93 } 94 95 ret = xfs_errortag_set(mp, xfs_attr->tag, val); 96 if (ret) 97 return ret; 98 return count; 99 } 100 101 STATIC ssize_t 102 xfs_errortag_attr_show( 103 struct kobject *kobject, 104 struct attribute *attr, 105 char *buf) 106 { 107 struct xfs_mount *mp = to_mp(kobject); 108 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 109 110 return snprintf(buf, PAGE_SIZE, "%u\n", 111 xfs_errortag_get(mp, xfs_attr->tag)); 112 } 113 114 static const struct sysfs_ops xfs_errortag_sysfs_ops = { 115 .show = xfs_errortag_attr_show, 116 .store = xfs_errortag_attr_store, 117 }; 118 119 #define XFS_ERRORTAG_ATTR_RW(_name, _tag) \ 120 static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \ 121 .attr = {.name = __stringify(_name), \ 122 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \ 123 .tag = (_tag), \ 124 } 125 126 #define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr 127 128 XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR); 129 XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1); 130 XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2); 131 XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3); 132 XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4); 133 XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5); 134 XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6); 135 XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF); 136 XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK); 137 XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK); 138 XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF); 139 XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI); 140 XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP); 141 XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK); 142 XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE); 143 XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE); 144 XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK); 145 XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR); 146 XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR); 147 XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR); 148 XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR); 149 XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT); 150 XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT); 151 XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE); 152 XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE); 153 XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE); 154 XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE); 155 XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL); 156 XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES); 157 XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC); 158 XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN); 159 XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF); 160 XFS_ERRORTAG_ATTR_RW(force_repair, XFS_ERRTAG_FORCE_SCRUB_REPAIR); 161 XFS_ERRORTAG_ATTR_RW(bad_summary, XFS_ERRTAG_FORCE_SUMMARY_RECALC); 162 163 static struct attribute *xfs_errortag_attrs[] = { 164 XFS_ERRORTAG_ATTR_LIST(noerror), 165 XFS_ERRORTAG_ATTR_LIST(iflush1), 166 XFS_ERRORTAG_ATTR_LIST(iflush2), 167 XFS_ERRORTAG_ATTR_LIST(iflush3), 168 XFS_ERRORTAG_ATTR_LIST(iflush4), 169 XFS_ERRORTAG_ATTR_LIST(iflush5), 170 XFS_ERRORTAG_ATTR_LIST(iflush6), 171 XFS_ERRORTAG_ATTR_LIST(dareadbuf), 172 XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk), 173 XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk), 174 XFS_ERRORTAG_ATTR_LIST(readagf), 175 XFS_ERRORTAG_ATTR_LIST(readagi), 176 XFS_ERRORTAG_ATTR_LIST(itobp), 177 XFS_ERRORTAG_ATTR_LIST(iunlink), 178 XFS_ERRORTAG_ATTR_LIST(iunlinkrm), 179 XFS_ERRORTAG_ATTR_LIST(dirinovalid), 180 XFS_ERRORTAG_ATTR_LIST(bulkstat), 181 XFS_ERRORTAG_ATTR_LIST(logiodone), 182 XFS_ERRORTAG_ATTR_LIST(stratread), 183 XFS_ERRORTAG_ATTR_LIST(stratcmpl), 184 XFS_ERRORTAG_ATTR_LIST(diowrite), 185 XFS_ERRORTAG_ATTR_LIST(bmapifmt), 186 XFS_ERRORTAG_ATTR_LIST(free_extent), 187 XFS_ERRORTAG_ATTR_LIST(rmap_finish_one), 188 XFS_ERRORTAG_ATTR_LIST(refcount_continue_update), 189 XFS_ERRORTAG_ATTR_LIST(refcount_finish_one), 190 XFS_ERRORTAG_ATTR_LIST(bmap_finish_one), 191 XFS_ERRORTAG_ATTR_LIST(ag_resv_critical), 192 XFS_ERRORTAG_ATTR_LIST(drop_writes), 193 XFS_ERRORTAG_ATTR_LIST(log_bad_crc), 194 XFS_ERRORTAG_ATTR_LIST(log_item_pin), 195 XFS_ERRORTAG_ATTR_LIST(buf_lru_ref), 196 XFS_ERRORTAG_ATTR_LIST(force_repair), 197 XFS_ERRORTAG_ATTR_LIST(bad_summary), 198 NULL, 199 }; 200 201 static struct kobj_type xfs_errortag_ktype = { 202 .release = xfs_sysfs_release, 203 .sysfs_ops = &xfs_errortag_sysfs_ops, 204 .default_attrs = xfs_errortag_attrs, 205 }; 206 207 int 208 xfs_errortag_init( 209 struct xfs_mount *mp) 210 { 211 mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX, 212 KM_SLEEP | KM_MAYFAIL); 213 if (!mp->m_errortag) 214 return -ENOMEM; 215 216 return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype, 217 &mp->m_kobj, "errortag"); 218 } 219 220 void 221 xfs_errortag_del( 222 struct xfs_mount *mp) 223 { 224 xfs_sysfs_del(&mp->m_errortag_kobj); 225 kmem_free(mp->m_errortag); 226 } 227 228 bool 229 xfs_errortag_test( 230 struct xfs_mount *mp, 231 const char *expression, 232 const char *file, 233 int line, 234 unsigned int error_tag) 235 { 236 unsigned int randfactor; 237 238 /* 239 * To be able to use error injection anywhere, we need to ensure error 240 * injection mechanism is already initialized. 241 * 242 * Code paths like I/O completion can be called before the 243 * initialization is complete, but be able to inject errors in such 244 * places is still useful. 245 */ 246 if (!mp->m_errortag) 247 return false; 248 249 ASSERT(error_tag < XFS_ERRTAG_MAX); 250 randfactor = mp->m_errortag[error_tag]; 251 if (!randfactor || prandom_u32() % randfactor) 252 return false; 253 254 xfs_warn_ratelimited(mp, 255 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"", 256 expression, file, line, mp->m_fsname); 257 return true; 258 } 259 260 int 261 xfs_errortag_get( 262 struct xfs_mount *mp, 263 unsigned int error_tag) 264 { 265 if (error_tag >= XFS_ERRTAG_MAX) 266 return -EINVAL; 267 268 return mp->m_errortag[error_tag]; 269 } 270 271 int 272 xfs_errortag_set( 273 struct xfs_mount *mp, 274 unsigned int error_tag, 275 unsigned int tag_value) 276 { 277 if (error_tag >= XFS_ERRTAG_MAX) 278 return -EINVAL; 279 280 mp->m_errortag[error_tag] = tag_value; 281 return 0; 282 } 283 284 int 285 xfs_errortag_add( 286 struct xfs_mount *mp, 287 unsigned int error_tag) 288 { 289 if (error_tag >= XFS_ERRTAG_MAX) 290 return -EINVAL; 291 292 return xfs_errortag_set(mp, error_tag, 293 xfs_errortag_random_default[error_tag]); 294 } 295 296 int 297 xfs_errortag_clearall( 298 struct xfs_mount *mp) 299 { 300 memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX); 301 return 0; 302 } 303 #endif /* DEBUG */ 304 305 void 306 xfs_error_report( 307 const char *tag, 308 int level, 309 struct xfs_mount *mp, 310 const char *filename, 311 int linenum, 312 xfs_failaddr_t failaddr) 313 { 314 if (level <= xfs_error_level) { 315 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT, 316 "Internal error %s at line %d of file %s. Caller %pS", 317 tag, linenum, filename, failaddr); 318 319 xfs_stack_trace(); 320 } 321 } 322 323 void 324 xfs_corruption_error( 325 const char *tag, 326 int level, 327 struct xfs_mount *mp, 328 void *buf, 329 size_t bufsize, 330 const char *filename, 331 int linenum, 332 xfs_failaddr_t failaddr) 333 { 334 if (level <= xfs_error_level) 335 xfs_hex_dump(buf, bufsize); 336 xfs_error_report(tag, level, mp, filename, linenum, failaddr); 337 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair"); 338 } 339 340 /* 341 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 342 * values, and omit the stack trace unless the error level is tuned high. 343 */ 344 void 345 xfs_buf_verifier_error( 346 struct xfs_buf *bp, 347 int error, 348 const char *name, 349 void *buf, 350 size_t bufsz, 351 xfs_failaddr_t failaddr) 352 { 353 struct xfs_mount *mp = bp->b_target->bt_mount; 354 xfs_failaddr_t fa; 355 int sz; 356 357 fa = failaddr ? failaddr : __return_address; 358 __xfs_buf_ioerror(bp, error, fa); 359 360 xfs_alert(mp, "Metadata %s detected at %pS, %s block 0x%llx %s", 361 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption", 362 fa, bp->b_ops->name, bp->b_bn, name); 363 364 xfs_alert(mp, "Unmount and run xfs_repair"); 365 366 if (xfs_error_level >= XFS_ERRLEVEL_LOW) { 367 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 368 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 369 sz); 370 xfs_hex_dump(buf, sz); 371 } 372 373 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 374 xfs_stack_trace(); 375 } 376 377 /* 378 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 379 * values, and omit the stack trace unless the error level is tuned high. 380 */ 381 void 382 xfs_verifier_error( 383 struct xfs_buf *bp, 384 int error, 385 xfs_failaddr_t failaddr) 386 { 387 return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0), 388 XFS_CORRUPTION_DUMP_LEN, failaddr); 389 } 390 391 /* 392 * Warnings for inode corruption problems. Don't bother with the stack 393 * trace unless the error level is turned up high. 394 */ 395 void 396 xfs_inode_verifier_error( 397 struct xfs_inode *ip, 398 int error, 399 const char *name, 400 void *buf, 401 size_t bufsz, 402 xfs_failaddr_t failaddr) 403 { 404 struct xfs_mount *mp = ip->i_mount; 405 xfs_failaddr_t fa; 406 int sz; 407 408 fa = failaddr ? failaddr : __return_address; 409 410 xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s", 411 error == -EFSBADCRC ? "CRC error" : "corruption", 412 fa, ip->i_ino, name); 413 414 xfs_alert(mp, "Unmount and run xfs_repair"); 415 416 if (buf && xfs_error_level >= XFS_ERRLEVEL_LOW) { 417 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 418 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 419 sz); 420 xfs_hex_dump(buf, sz); 421 } 422 423 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 424 xfs_stack_trace(); 425 } 426