1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
7 #include "xfs_shared.h"
8 #include "xfs_format.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"
20 static unsigned int xfs_errortag_random_default[] = {
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,
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 XFS_RANDOM_REDUCE_MAX_IEXTENTS,
58 XFS_RANDOM_BMAP_ALLOC_MINLEN_EXTENT,
61 struct xfs_errortag_attr {
62 struct attribute attr;
66 static inline struct xfs_errortag_attr *
67 to_attr(struct attribute *attr)
69 return container_of(attr, struct xfs_errortag_attr, attr);
72 static inline struct xfs_mount *
73 to_mp(struct kobject *kobject)
75 struct xfs_kobj *kobj = to_kobj(kobject);
77 return container_of(kobj, struct xfs_mount, m_errortag_kobj);
81 xfs_errortag_attr_store(
82 struct kobject *kobject,
83 struct attribute *attr,
87 struct xfs_mount *mp = to_mp(kobject);
88 struct xfs_errortag_attr *xfs_attr = to_attr(attr);
92 if (strcmp(buf, "default") == 0) {
93 val = xfs_errortag_random_default[xfs_attr->tag];
95 ret = kstrtouint(buf, 0, &val);
100 ret = xfs_errortag_set(mp, xfs_attr->tag, val);
107 xfs_errortag_attr_show(
108 struct kobject *kobject,
109 struct attribute *attr,
112 struct xfs_mount *mp = to_mp(kobject);
113 struct xfs_errortag_attr *xfs_attr = to_attr(attr);
115 return snprintf(buf, PAGE_SIZE, "%u\n",
116 xfs_errortag_get(mp, xfs_attr->tag));
119 static const struct sysfs_ops xfs_errortag_sysfs_ops = {
120 .show = xfs_errortag_attr_show,
121 .store = xfs_errortag_attr_store,
124 #define XFS_ERRORTAG_ATTR_RW(_name, _tag) \
125 static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \
126 .attr = {.name = __stringify(_name), \
127 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \
131 #define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr
133 XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR);
134 XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1);
135 XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2);
136 XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3);
137 XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4);
138 XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5);
139 XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6);
140 XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF);
141 XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK);
142 XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK);
143 XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF);
144 XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI);
145 XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP);
146 XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK);
147 XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE);
148 XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE);
149 XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK);
150 XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR);
151 XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR);
152 XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR);
153 XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR);
154 XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT);
155 XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT);
156 XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE);
157 XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE);
158 XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE);
159 XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE);
160 XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL);
161 XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES);
162 XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC);
163 XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN);
164 XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF);
165 XFS_ERRORTAG_ATTR_RW(force_repair, XFS_ERRTAG_FORCE_SCRUB_REPAIR);
166 XFS_ERRORTAG_ATTR_RW(bad_summary, XFS_ERRTAG_FORCE_SUMMARY_RECALC);
167 XFS_ERRORTAG_ATTR_RW(iunlink_fallback, XFS_ERRTAG_IUNLINK_FALLBACK);
168 XFS_ERRORTAG_ATTR_RW(buf_ioerror, XFS_ERRTAG_BUF_IOERROR);
169 XFS_ERRORTAG_ATTR_RW(reduce_max_iextents, XFS_ERRTAG_REDUCE_MAX_IEXTENTS);
170 XFS_ERRORTAG_ATTR_RW(bmap_alloc_minlen_extent, XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT);
172 static struct attribute *xfs_errortag_attrs[] = {
173 XFS_ERRORTAG_ATTR_LIST(noerror),
174 XFS_ERRORTAG_ATTR_LIST(iflush1),
175 XFS_ERRORTAG_ATTR_LIST(iflush2),
176 XFS_ERRORTAG_ATTR_LIST(iflush3),
177 XFS_ERRORTAG_ATTR_LIST(iflush4),
178 XFS_ERRORTAG_ATTR_LIST(iflush5),
179 XFS_ERRORTAG_ATTR_LIST(iflush6),
180 XFS_ERRORTAG_ATTR_LIST(dareadbuf),
181 XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk),
182 XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk),
183 XFS_ERRORTAG_ATTR_LIST(readagf),
184 XFS_ERRORTAG_ATTR_LIST(readagi),
185 XFS_ERRORTAG_ATTR_LIST(itobp),
186 XFS_ERRORTAG_ATTR_LIST(iunlink),
187 XFS_ERRORTAG_ATTR_LIST(iunlinkrm),
188 XFS_ERRORTAG_ATTR_LIST(dirinovalid),
189 XFS_ERRORTAG_ATTR_LIST(bulkstat),
190 XFS_ERRORTAG_ATTR_LIST(logiodone),
191 XFS_ERRORTAG_ATTR_LIST(stratread),
192 XFS_ERRORTAG_ATTR_LIST(stratcmpl),
193 XFS_ERRORTAG_ATTR_LIST(diowrite),
194 XFS_ERRORTAG_ATTR_LIST(bmapifmt),
195 XFS_ERRORTAG_ATTR_LIST(free_extent),
196 XFS_ERRORTAG_ATTR_LIST(rmap_finish_one),
197 XFS_ERRORTAG_ATTR_LIST(refcount_continue_update),
198 XFS_ERRORTAG_ATTR_LIST(refcount_finish_one),
199 XFS_ERRORTAG_ATTR_LIST(bmap_finish_one),
200 XFS_ERRORTAG_ATTR_LIST(ag_resv_critical),
201 XFS_ERRORTAG_ATTR_LIST(drop_writes),
202 XFS_ERRORTAG_ATTR_LIST(log_bad_crc),
203 XFS_ERRORTAG_ATTR_LIST(log_item_pin),
204 XFS_ERRORTAG_ATTR_LIST(buf_lru_ref),
205 XFS_ERRORTAG_ATTR_LIST(force_repair),
206 XFS_ERRORTAG_ATTR_LIST(bad_summary),
207 XFS_ERRORTAG_ATTR_LIST(iunlink_fallback),
208 XFS_ERRORTAG_ATTR_LIST(buf_ioerror),
209 XFS_ERRORTAG_ATTR_LIST(reduce_max_iextents),
210 XFS_ERRORTAG_ATTR_LIST(bmap_alloc_minlen_extent),
214 static struct kobj_type xfs_errortag_ktype = {
215 .release = xfs_sysfs_release,
216 .sysfs_ops = &xfs_errortag_sysfs_ops,
217 .default_attrs = xfs_errortag_attrs,
222 struct xfs_mount *mp)
224 mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX,
229 return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
230 &mp->m_kobj, "errortag");
235 struct xfs_mount *mp)
237 xfs_sysfs_del(&mp->m_errortag_kobj);
238 kmem_free(mp->m_errortag);
243 struct xfs_mount *mp,
244 const char *expression,
247 unsigned int error_tag)
249 unsigned int randfactor;
252 * To be able to use error injection anywhere, we need to ensure error
253 * injection mechanism is already initialized.
255 * Code paths like I/O completion can be called before the
256 * initialization is complete, but be able to inject errors in such
257 * places is still useful.
262 ASSERT(error_tag < XFS_ERRTAG_MAX);
263 randfactor = mp->m_errortag[error_tag];
264 if (!randfactor || prandom_u32() % randfactor)
267 xfs_warn_ratelimited(mp,
268 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
269 expression, file, line, mp->m_super->s_id);
275 struct xfs_mount *mp,
276 unsigned int error_tag)
278 if (error_tag >= XFS_ERRTAG_MAX)
281 return mp->m_errortag[error_tag];
286 struct xfs_mount *mp,
287 unsigned int error_tag,
288 unsigned int tag_value)
290 if (error_tag >= XFS_ERRTAG_MAX)
293 mp->m_errortag[error_tag] = tag_value;
299 struct xfs_mount *mp,
300 unsigned int error_tag)
302 if (error_tag >= XFS_ERRTAG_MAX)
305 return xfs_errortag_set(mp, error_tag,
306 xfs_errortag_random_default[error_tag]);
310 xfs_errortag_clearall(
311 struct xfs_mount *mp)
313 memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX);
322 struct xfs_mount *mp,
323 const char *filename,
325 xfs_failaddr_t failaddr)
327 if (level <= xfs_error_level) {
328 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
329 "Internal error %s at line %d of file %s. Caller %pS",
330 tag, linenum, filename, failaddr);
337 xfs_corruption_error(
340 struct xfs_mount *mp,
343 const char *filename,
345 xfs_failaddr_t failaddr)
347 if (buf && level <= xfs_error_level)
348 xfs_hex_dump(buf, bufsize);
349 xfs_error_report(tag, level, mp, filename, linenum, failaddr);
350 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
354 * Complain about the kinds of metadata corruption that we can't detect from a
355 * verifier, such as incorrect inter-block relationship data. Does not set
358 * Call xfs_buf_mark_corrupt, not this function.
361 xfs_buf_corruption_error(
365 struct xfs_mount *mp = bp->b_mount;
367 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
368 "Metadata corruption detected at %pS, %s block 0x%llx",
369 fa, bp->b_ops->name, bp->b_bn);
371 xfs_alert(mp, "Unmount and run xfs_repair");
373 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
378 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid
379 * values, and omit the stack trace unless the error level is tuned high.
382 xfs_buf_verifier_error(
388 xfs_failaddr_t failaddr)
390 struct xfs_mount *mp = bp->b_mount;
394 fa = failaddr ? failaddr : __return_address;
395 __xfs_buf_ioerror(bp, error, fa);
397 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
398 "Metadata %s detected at %pS, %s block 0x%llx %s",
399 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
400 fa, bp->b_ops->name, bp->b_bn, name);
402 xfs_alert(mp, "Unmount and run xfs_repair");
404 if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
405 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz);
406 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
408 xfs_hex_dump(buf, sz);
411 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
416 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid
417 * values, and omit the stack trace unless the error level is tuned high.
423 xfs_failaddr_t failaddr)
425 return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0),
426 XFS_CORRUPTION_DUMP_LEN, failaddr);
430 * Warnings for inode corruption problems. Don't bother with the stack
431 * trace unless the error level is turned up high.
434 xfs_inode_verifier_error(
435 struct xfs_inode *ip,
440 xfs_failaddr_t failaddr)
442 struct xfs_mount *mp = ip->i_mount;
446 fa = failaddr ? failaddr : __return_address;
448 xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s",
449 error == -EFSBADCRC ? "CRC error" : "corruption",
450 fa, ip->i_ino, name);
452 xfs_alert(mp, "Unmount and run xfs_repair");
454 if (buf && xfs_error_level >= XFS_ERRLEVEL_LOW) {
455 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz);
456 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
458 xfs_hex_dump(buf, sz);
461 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)