1 /* 2 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #include "xfs.h" 19 #include "xfs_format.h" 20 #include "xfs_fs.h" 21 #include "xfs_log_format.h" 22 #include "xfs_trans_resv.h" 23 #include "xfs_mount.h" 24 #include "xfs_errortag.h" 25 #include "xfs_error.h" 26 #include "xfs_sysfs.h" 27 #include "xfs_inode.h" 28 29 #ifdef DEBUG 30 31 static unsigned int xfs_errortag_random_default[] = { 32 XFS_RANDOM_DEFAULT, 33 XFS_RANDOM_IFLUSH_1, 34 XFS_RANDOM_IFLUSH_2, 35 XFS_RANDOM_IFLUSH_3, 36 XFS_RANDOM_IFLUSH_4, 37 XFS_RANDOM_IFLUSH_5, 38 XFS_RANDOM_IFLUSH_6, 39 XFS_RANDOM_DA_READ_BUF, 40 XFS_RANDOM_BTREE_CHECK_LBLOCK, 41 XFS_RANDOM_BTREE_CHECK_SBLOCK, 42 XFS_RANDOM_ALLOC_READ_AGF, 43 XFS_RANDOM_IALLOC_READ_AGI, 44 XFS_RANDOM_ITOBP_INOTOBP, 45 XFS_RANDOM_IUNLINK, 46 XFS_RANDOM_IUNLINK_REMOVE, 47 XFS_RANDOM_DIR_INO_VALIDATE, 48 XFS_RANDOM_BULKSTAT_READ_CHUNK, 49 XFS_RANDOM_IODONE_IOERR, 50 XFS_RANDOM_STRATREAD_IOERR, 51 XFS_RANDOM_STRATCMPL_IOERR, 52 XFS_RANDOM_DIOWRITE_IOERR, 53 XFS_RANDOM_BMAPIFORMAT, 54 XFS_RANDOM_FREE_EXTENT, 55 XFS_RANDOM_RMAP_FINISH_ONE, 56 XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE, 57 XFS_RANDOM_REFCOUNT_FINISH_ONE, 58 XFS_RANDOM_BMAP_FINISH_ONE, 59 XFS_RANDOM_AG_RESV_CRITICAL, 60 XFS_RANDOM_DROP_WRITES, 61 XFS_RANDOM_LOG_BAD_CRC, 62 XFS_RANDOM_LOG_ITEM_PIN, 63 XFS_RANDOM_BUF_LRU_REF, 64 }; 65 66 struct xfs_errortag_attr { 67 struct attribute attr; 68 unsigned int tag; 69 }; 70 71 static inline struct xfs_errortag_attr * 72 to_attr(struct attribute *attr) 73 { 74 return container_of(attr, struct xfs_errortag_attr, attr); 75 } 76 77 static inline struct xfs_mount * 78 to_mp(struct kobject *kobject) 79 { 80 struct xfs_kobj *kobj = to_kobj(kobject); 81 82 return container_of(kobj, struct xfs_mount, m_errortag_kobj); 83 } 84 85 STATIC ssize_t 86 xfs_errortag_attr_store( 87 struct kobject *kobject, 88 struct attribute *attr, 89 const char *buf, 90 size_t count) 91 { 92 struct xfs_mount *mp = to_mp(kobject); 93 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 94 int ret; 95 unsigned int val; 96 97 if (strcmp(buf, "default") == 0) { 98 val = xfs_errortag_random_default[xfs_attr->tag]; 99 } else { 100 ret = kstrtouint(buf, 0, &val); 101 if (ret) 102 return ret; 103 } 104 105 ret = xfs_errortag_set(mp, xfs_attr->tag, val); 106 if (ret) 107 return ret; 108 return count; 109 } 110 111 STATIC ssize_t 112 xfs_errortag_attr_show( 113 struct kobject *kobject, 114 struct attribute *attr, 115 char *buf) 116 { 117 struct xfs_mount *mp = to_mp(kobject); 118 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 119 120 return snprintf(buf, PAGE_SIZE, "%u\n", 121 xfs_errortag_get(mp, xfs_attr->tag)); 122 } 123 124 static const struct sysfs_ops xfs_errortag_sysfs_ops = { 125 .show = xfs_errortag_attr_show, 126 .store = xfs_errortag_attr_store, 127 }; 128 129 #define XFS_ERRORTAG_ATTR_RW(_name, _tag) \ 130 static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \ 131 .attr = {.name = __stringify(_name), \ 132 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \ 133 .tag = (_tag), \ 134 } 135 136 #define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr 137 138 XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR); 139 XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1); 140 XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2); 141 XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3); 142 XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4); 143 XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5); 144 XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6); 145 XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF); 146 XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK); 147 XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK); 148 XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF); 149 XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI); 150 XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP); 151 XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK); 152 XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE); 153 XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE); 154 XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK); 155 XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR); 156 XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR); 157 XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR); 158 XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR); 159 XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT); 160 XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT); 161 XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE); 162 XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE); 163 XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE); 164 XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE); 165 XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL); 166 XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES); 167 XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC); 168 XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN); 169 XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF); 170 171 static struct attribute *xfs_errortag_attrs[] = { 172 XFS_ERRORTAG_ATTR_LIST(noerror), 173 XFS_ERRORTAG_ATTR_LIST(iflush1), 174 XFS_ERRORTAG_ATTR_LIST(iflush2), 175 XFS_ERRORTAG_ATTR_LIST(iflush3), 176 XFS_ERRORTAG_ATTR_LIST(iflush4), 177 XFS_ERRORTAG_ATTR_LIST(iflush5), 178 XFS_ERRORTAG_ATTR_LIST(iflush6), 179 XFS_ERRORTAG_ATTR_LIST(dareadbuf), 180 XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk), 181 XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk), 182 XFS_ERRORTAG_ATTR_LIST(readagf), 183 XFS_ERRORTAG_ATTR_LIST(readagi), 184 XFS_ERRORTAG_ATTR_LIST(itobp), 185 XFS_ERRORTAG_ATTR_LIST(iunlink), 186 XFS_ERRORTAG_ATTR_LIST(iunlinkrm), 187 XFS_ERRORTAG_ATTR_LIST(dirinovalid), 188 XFS_ERRORTAG_ATTR_LIST(bulkstat), 189 XFS_ERRORTAG_ATTR_LIST(logiodone), 190 XFS_ERRORTAG_ATTR_LIST(stratread), 191 XFS_ERRORTAG_ATTR_LIST(stratcmpl), 192 XFS_ERRORTAG_ATTR_LIST(diowrite), 193 XFS_ERRORTAG_ATTR_LIST(bmapifmt), 194 XFS_ERRORTAG_ATTR_LIST(free_extent), 195 XFS_ERRORTAG_ATTR_LIST(rmap_finish_one), 196 XFS_ERRORTAG_ATTR_LIST(refcount_continue_update), 197 XFS_ERRORTAG_ATTR_LIST(refcount_finish_one), 198 XFS_ERRORTAG_ATTR_LIST(bmap_finish_one), 199 XFS_ERRORTAG_ATTR_LIST(ag_resv_critical), 200 XFS_ERRORTAG_ATTR_LIST(drop_writes), 201 XFS_ERRORTAG_ATTR_LIST(log_bad_crc), 202 XFS_ERRORTAG_ATTR_LIST(log_item_pin), 203 XFS_ERRORTAG_ATTR_LIST(buf_lru_ref), 204 NULL, 205 }; 206 207 static struct kobj_type xfs_errortag_ktype = { 208 .release = xfs_sysfs_release, 209 .sysfs_ops = &xfs_errortag_sysfs_ops, 210 .default_attrs = xfs_errortag_attrs, 211 }; 212 213 int 214 xfs_errortag_init( 215 struct xfs_mount *mp) 216 { 217 mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX, 218 KM_SLEEP | KM_MAYFAIL); 219 if (!mp->m_errortag) 220 return -ENOMEM; 221 222 return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype, 223 &mp->m_kobj, "errortag"); 224 } 225 226 void 227 xfs_errortag_del( 228 struct xfs_mount *mp) 229 { 230 xfs_sysfs_del(&mp->m_errortag_kobj); 231 kmem_free(mp->m_errortag); 232 } 233 234 bool 235 xfs_errortag_test( 236 struct xfs_mount *mp, 237 const char *expression, 238 const char *file, 239 int line, 240 unsigned int error_tag) 241 { 242 unsigned int randfactor; 243 244 /* 245 * To be able to use error injection anywhere, we need to ensure error 246 * injection mechanism is already initialized. 247 * 248 * Code paths like I/O completion can be called before the 249 * initialization is complete, but be able to inject errors in such 250 * places is still useful. 251 */ 252 if (!mp->m_errortag) 253 return false; 254 255 ASSERT(error_tag < XFS_ERRTAG_MAX); 256 randfactor = mp->m_errortag[error_tag]; 257 if (!randfactor || prandom_u32() % randfactor) 258 return false; 259 260 xfs_warn_ratelimited(mp, 261 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"", 262 expression, file, line, mp->m_fsname); 263 return true; 264 } 265 266 int 267 xfs_errortag_get( 268 struct xfs_mount *mp, 269 unsigned int error_tag) 270 { 271 if (error_tag >= XFS_ERRTAG_MAX) 272 return -EINVAL; 273 274 return mp->m_errortag[error_tag]; 275 } 276 277 int 278 xfs_errortag_set( 279 struct xfs_mount *mp, 280 unsigned int error_tag, 281 unsigned int tag_value) 282 { 283 if (error_tag >= XFS_ERRTAG_MAX) 284 return -EINVAL; 285 286 mp->m_errortag[error_tag] = tag_value; 287 return 0; 288 } 289 290 int 291 xfs_errortag_add( 292 struct xfs_mount *mp, 293 unsigned int error_tag) 294 { 295 if (error_tag >= XFS_ERRTAG_MAX) 296 return -EINVAL; 297 298 return xfs_errortag_set(mp, error_tag, 299 xfs_errortag_random_default[error_tag]); 300 } 301 302 int 303 xfs_errortag_clearall( 304 struct xfs_mount *mp) 305 { 306 memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX); 307 return 0; 308 } 309 #endif /* DEBUG */ 310 311 void 312 xfs_error_report( 313 const char *tag, 314 int level, 315 struct xfs_mount *mp, 316 const char *filename, 317 int linenum, 318 xfs_failaddr_t failaddr) 319 { 320 if (level <= xfs_error_level) { 321 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT, 322 "Internal error %s at line %d of file %s. Caller %pS", 323 tag, linenum, filename, failaddr); 324 325 xfs_stack_trace(); 326 } 327 } 328 329 void 330 xfs_corruption_error( 331 const char *tag, 332 int level, 333 struct xfs_mount *mp, 334 void *p, 335 const char *filename, 336 int linenum, 337 xfs_failaddr_t failaddr) 338 { 339 if (level <= xfs_error_level) 340 xfs_hex_dump(p, XFS_CORRUPTION_DUMP_LEN); 341 xfs_error_report(tag, level, mp, filename, linenum, failaddr); 342 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair"); 343 } 344 345 /* 346 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 347 * values, and omit the stack trace unless the error level is tuned high. 348 */ 349 void 350 xfs_buf_verifier_error( 351 struct xfs_buf *bp, 352 int error, 353 const char *name, 354 void *buf, 355 size_t bufsz, 356 xfs_failaddr_t failaddr) 357 { 358 struct xfs_mount *mp = bp->b_target->bt_mount; 359 xfs_failaddr_t fa; 360 int sz; 361 362 fa = failaddr ? failaddr : __return_address; 363 __xfs_buf_ioerror(bp, error, fa); 364 365 xfs_alert(mp, "Metadata %s detected at %pS, %s block 0x%llx %s", 366 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption", 367 fa, bp->b_ops->name, bp->b_bn, name); 368 369 xfs_alert(mp, "Unmount and run xfs_repair"); 370 371 if (xfs_error_level >= XFS_ERRLEVEL_LOW) { 372 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 373 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 374 sz); 375 xfs_hex_dump(buf, sz); 376 } 377 378 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 379 xfs_stack_trace(); 380 } 381 382 /* 383 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 384 * values, and omit the stack trace unless the error level is tuned high. 385 */ 386 void 387 xfs_verifier_error( 388 struct xfs_buf *bp, 389 int error, 390 xfs_failaddr_t failaddr) 391 { 392 return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0), 393 XFS_CORRUPTION_DUMP_LEN, failaddr); 394 } 395 396 /* 397 * Warnings for inode corruption problems. Don't bother with the stack 398 * trace unless the error level is turned up high. 399 */ 400 void 401 xfs_inode_verifier_error( 402 struct xfs_inode *ip, 403 int error, 404 const char *name, 405 void *buf, 406 size_t bufsz, 407 xfs_failaddr_t failaddr) 408 { 409 struct xfs_mount *mp = ip->i_mount; 410 xfs_failaddr_t fa; 411 int sz; 412 413 fa = failaddr ? failaddr : __return_address; 414 415 xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s", 416 error == -EFSBADCRC ? "CRC error" : "corruption", 417 fa, ip->i_ino, name); 418 419 xfs_alert(mp, "Unmount and run xfs_repair"); 420 421 if (buf && xfs_error_level >= XFS_ERRLEVEL_LOW) { 422 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 423 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 424 sz); 425 xfs_hex_dump(buf, sz); 426 } 427 428 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 429 xfs_stack_trace(); 430 } 431