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