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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
20static 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 0, /* XFS_RANDOM_DROP_WRITES has been removed */
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,
59 XFS_RANDOM_AG_RESV_FAIL,
60 XFS_RANDOM_LARP,
61 XFS_RANDOM_DA_LEAF_SPLIT,
62 XFS_RANDOM_ATTR_LEAF_TO_NODE,
63 XFS_RANDOM_WB_DELAY_MS,
64 XFS_RANDOM_WRITE_DELAY_MS,
65 XFS_RANDOM_EXCHMAPS_FINISH_ONE,
66};
67
68struct xfs_errortag_attr {
69 struct attribute attr;
70 unsigned int tag;
71};
72
73static inline struct xfs_errortag_attr *
74to_attr(struct attribute *attr)
75{
76 return container_of(attr, struct xfs_errortag_attr, attr);
77}
78
79static inline struct xfs_mount *
80to_mp(struct kobject *kobject)
81{
82 struct xfs_kobj *kobj = to_kobj(kobject);
83
84 return container_of(kobj, struct xfs_mount, m_errortag_kobj);
85}
86
87STATIC ssize_t
88xfs_errortag_attr_store(
89 struct kobject *kobject,
90 struct attribute *attr,
91 const char *buf,
92 size_t count)
93{
94 struct xfs_mount *mp = to_mp(kobject);
95 struct xfs_errortag_attr *xfs_attr = to_attr(attr);
96 int ret;
97 unsigned int val;
98
99 if (strcmp(buf, "default") == 0) {
100 val = xfs_errortag_random_default[xfs_attr->tag];
101 } else {
102 ret = kstrtouint(buf, 0, &val);
103 if (ret)
104 return ret;
105 }
106
107 ret = xfs_errortag_set(mp, xfs_attr->tag, val);
108 if (ret)
109 return ret;
110 return count;
111}
112
113STATIC ssize_t
114xfs_errortag_attr_show(
115 struct kobject *kobject,
116 struct attribute *attr,
117 char *buf)
118{
119 struct xfs_mount *mp = to_mp(kobject);
120 struct xfs_errortag_attr *xfs_attr = to_attr(attr);
121
122 return snprintf(buf, PAGE_SIZE, "%u\n",
123 xfs_errortag_get(mp, xfs_attr->tag));
124}
125
126static const struct sysfs_ops xfs_errortag_sysfs_ops = {
127 .show = xfs_errortag_attr_show,
128 .store = xfs_errortag_attr_store,
129};
130
131#define XFS_ERRORTAG_ATTR_RW(_name, _tag) \
132static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \
133 .attr = {.name = __stringify(_name), \
134 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \
135 .tag = (_tag), \
136}
137
138#define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr
139
140XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR);
141XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1);
142XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2);
143XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3);
144XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4);
145XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5);
146XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6);
147XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF);
148XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK);
149XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK);
150XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF);
151XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI);
152XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP);
153XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK);
154XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE);
155XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE);
156XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK);
157XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR);
158XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR);
159XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR);
160XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR);
161XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT);
162XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT);
163XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE);
164XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE);
165XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE);
166XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE);
167XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL);
168XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC);
169XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN);
170XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF);
171XFS_ERRORTAG_ATTR_RW(force_repair, XFS_ERRTAG_FORCE_SCRUB_REPAIR);
172XFS_ERRORTAG_ATTR_RW(bad_summary, XFS_ERRTAG_FORCE_SUMMARY_RECALC);
173XFS_ERRORTAG_ATTR_RW(iunlink_fallback, XFS_ERRTAG_IUNLINK_FALLBACK);
174XFS_ERRORTAG_ATTR_RW(buf_ioerror, XFS_ERRTAG_BUF_IOERROR);
175XFS_ERRORTAG_ATTR_RW(reduce_max_iextents, XFS_ERRTAG_REDUCE_MAX_IEXTENTS);
176XFS_ERRORTAG_ATTR_RW(bmap_alloc_minlen_extent, XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT);
177XFS_ERRORTAG_ATTR_RW(ag_resv_fail, XFS_ERRTAG_AG_RESV_FAIL);
178XFS_ERRORTAG_ATTR_RW(larp, XFS_ERRTAG_LARP);
179XFS_ERRORTAG_ATTR_RW(da_leaf_split, XFS_ERRTAG_DA_LEAF_SPLIT);
180XFS_ERRORTAG_ATTR_RW(attr_leaf_to_node, XFS_ERRTAG_ATTR_LEAF_TO_NODE);
181XFS_ERRORTAG_ATTR_RW(wb_delay_ms, XFS_ERRTAG_WB_DELAY_MS);
182XFS_ERRORTAG_ATTR_RW(write_delay_ms, XFS_ERRTAG_WRITE_DELAY_MS);
183XFS_ERRORTAG_ATTR_RW(exchmaps_finish_one, XFS_ERRTAG_EXCHMAPS_FINISH_ONE);
184
185static struct attribute *xfs_errortag_attrs[] = {
186 XFS_ERRORTAG_ATTR_LIST(noerror),
187 XFS_ERRORTAG_ATTR_LIST(iflush1),
188 XFS_ERRORTAG_ATTR_LIST(iflush2),
189 XFS_ERRORTAG_ATTR_LIST(iflush3),
190 XFS_ERRORTAG_ATTR_LIST(iflush4),
191 XFS_ERRORTAG_ATTR_LIST(iflush5),
192 XFS_ERRORTAG_ATTR_LIST(iflush6),
193 XFS_ERRORTAG_ATTR_LIST(dareadbuf),
194 XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk),
195 XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk),
196 XFS_ERRORTAG_ATTR_LIST(readagf),
197 XFS_ERRORTAG_ATTR_LIST(readagi),
198 XFS_ERRORTAG_ATTR_LIST(itobp),
199 XFS_ERRORTAG_ATTR_LIST(iunlink),
200 XFS_ERRORTAG_ATTR_LIST(iunlinkrm),
201 XFS_ERRORTAG_ATTR_LIST(dirinovalid),
202 XFS_ERRORTAG_ATTR_LIST(bulkstat),
203 XFS_ERRORTAG_ATTR_LIST(logiodone),
204 XFS_ERRORTAG_ATTR_LIST(stratread),
205 XFS_ERRORTAG_ATTR_LIST(stratcmpl),
206 XFS_ERRORTAG_ATTR_LIST(diowrite),
207 XFS_ERRORTAG_ATTR_LIST(bmapifmt),
208 XFS_ERRORTAG_ATTR_LIST(free_extent),
209 XFS_ERRORTAG_ATTR_LIST(rmap_finish_one),
210 XFS_ERRORTAG_ATTR_LIST(refcount_continue_update),
211 XFS_ERRORTAG_ATTR_LIST(refcount_finish_one),
212 XFS_ERRORTAG_ATTR_LIST(bmap_finish_one),
213 XFS_ERRORTAG_ATTR_LIST(ag_resv_critical),
214 XFS_ERRORTAG_ATTR_LIST(log_bad_crc),
215 XFS_ERRORTAG_ATTR_LIST(log_item_pin),
216 XFS_ERRORTAG_ATTR_LIST(buf_lru_ref),
217 XFS_ERRORTAG_ATTR_LIST(force_repair),
218 XFS_ERRORTAG_ATTR_LIST(bad_summary),
219 XFS_ERRORTAG_ATTR_LIST(iunlink_fallback),
220 XFS_ERRORTAG_ATTR_LIST(buf_ioerror),
221 XFS_ERRORTAG_ATTR_LIST(reduce_max_iextents),
222 XFS_ERRORTAG_ATTR_LIST(bmap_alloc_minlen_extent),
223 XFS_ERRORTAG_ATTR_LIST(ag_resv_fail),
224 XFS_ERRORTAG_ATTR_LIST(larp),
225 XFS_ERRORTAG_ATTR_LIST(da_leaf_split),
226 XFS_ERRORTAG_ATTR_LIST(attr_leaf_to_node),
227 XFS_ERRORTAG_ATTR_LIST(wb_delay_ms),
228 XFS_ERRORTAG_ATTR_LIST(write_delay_ms),
229 XFS_ERRORTAG_ATTR_LIST(exchmaps_finish_one),
230 NULL,
231};
232ATTRIBUTE_GROUPS(xfs_errortag);
233
234static const struct kobj_type xfs_errortag_ktype = {
235 .release = xfs_sysfs_release,
236 .sysfs_ops = &xfs_errortag_sysfs_ops,
237 .default_groups = xfs_errortag_groups,
238};
239
240int
241xfs_errortag_init(
242 struct xfs_mount *mp)
243{
244 int ret;
245
246 mp->m_errortag = kzalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX,
247 GFP_KERNEL | __GFP_RETRY_MAYFAIL);
248 if (!mp->m_errortag)
249 return -ENOMEM;
250
251 ret = xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
252 &mp->m_kobj, "errortag");
253 if (ret)
254 kfree(mp->m_errortag);
255 return ret;
256}
257
258void
259xfs_errortag_del(
260 struct xfs_mount *mp)
261{
262 xfs_sysfs_del(&mp->m_errortag_kobj);
263 kfree(mp->m_errortag);
264}
265
266static bool
267xfs_errortag_valid(
268 unsigned int error_tag)
269{
270 if (error_tag >= XFS_ERRTAG_MAX)
271 return false;
272
273 /* Error out removed injection types */
274 if (error_tag == XFS_ERRTAG_DROP_WRITES)
275 return false;
276 return true;
277}
278
279bool
280xfs_errortag_enabled(
281 struct xfs_mount *mp,
282 unsigned int tag)
283{
284 if (!mp->m_errortag)
285 return false;
286 if (!xfs_errortag_valid(tag))
287 return false;
288
289 return mp->m_errortag[tag] != 0;
290}
291
292bool
293xfs_errortag_test(
294 struct xfs_mount *mp,
295 const char *expression,
296 const char *file,
297 int line,
298 unsigned int error_tag)
299{
300 unsigned int randfactor;
301
302 /*
303 * To be able to use error injection anywhere, we need to ensure error
304 * injection mechanism is already initialized.
305 *
306 * Code paths like I/O completion can be called before the
307 * initialization is complete, but be able to inject errors in such
308 * places is still useful.
309 */
310 if (!mp->m_errortag)
311 return false;
312
313 if (!xfs_errortag_valid(error_tag))
314 return false;
315
316 randfactor = mp->m_errortag[error_tag];
317 if (!randfactor || get_random_u32_below(randfactor))
318 return false;
319
320 xfs_warn_ratelimited(mp,
321"Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
322 expression, file, line, mp->m_super->s_id);
323 return true;
324}
325
326int
327xfs_errortag_get(
328 struct xfs_mount *mp,
329 unsigned int error_tag)
330{
331 if (!xfs_errortag_valid(error_tag))
332 return -EINVAL;
333
334 return mp->m_errortag[error_tag];
335}
336
337int
338xfs_errortag_set(
339 struct xfs_mount *mp,
340 unsigned int error_tag,
341 unsigned int tag_value)
342{
343 if (!xfs_errortag_valid(error_tag))
344 return -EINVAL;
345
346 mp->m_errortag[error_tag] = tag_value;
347 return 0;
348}
349
350int
351xfs_errortag_add(
352 struct xfs_mount *mp,
353 unsigned int error_tag)
354{
355 BUILD_BUG_ON(ARRAY_SIZE(xfs_errortag_random_default) != XFS_ERRTAG_MAX);
356
357 if (!xfs_errortag_valid(error_tag))
358 return -EINVAL;
359
360 return xfs_errortag_set(mp, error_tag,
361 xfs_errortag_random_default[error_tag]);
362}
363
364int
365xfs_errortag_clearall(
366 struct xfs_mount *mp)
367{
368 memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX);
369 return 0;
370}
371#endif /* DEBUG */
372
373void
374xfs_error_report(
375 const char *tag,
376 int level,
377 struct xfs_mount *mp,
378 const char *filename,
379 int linenum,
380 xfs_failaddr_t failaddr)
381{
382 if (level <= xfs_error_level) {
383 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
384 "Internal error %s at line %d of file %s. Caller %pS",
385 tag, linenum, filename, failaddr);
386
387 xfs_stack_trace();
388 }
389}
390
391void
392xfs_corruption_error(
393 const char *tag,
394 int level,
395 struct xfs_mount *mp,
396 const void *buf,
397 size_t bufsize,
398 const char *filename,
399 int linenum,
400 xfs_failaddr_t failaddr)
401{
402 if (buf && level <= xfs_error_level)
403 xfs_hex_dump(buf, bufsize);
404 xfs_error_report(tag, level, mp, filename, linenum, failaddr);
405 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
406}
407
408/*
409 * Complain about the kinds of metadata corruption that we can't detect from a
410 * verifier, such as incorrect inter-block relationship data. Does not set
411 * bp->b_error.
412 *
413 * Call xfs_buf_mark_corrupt, not this function.
414 */
415void
416xfs_buf_corruption_error(
417 struct xfs_buf *bp,
418 xfs_failaddr_t fa)
419{
420 struct xfs_mount *mp = bp->b_mount;
421
422 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
423 "Metadata corruption detected at %pS, %s block 0x%llx",
424 fa, bp->b_ops->name, xfs_buf_daddr(bp));
425
426 xfs_alert(mp, "Unmount and run xfs_repair");
427
428 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
429 xfs_stack_trace();
430}
431
432/*
433 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid
434 * values, and omit the stack trace unless the error level is tuned high.
435 */
436void
437xfs_buf_verifier_error(
438 struct xfs_buf *bp,
439 int error,
440 const char *name,
441 const void *buf,
442 size_t bufsz,
443 xfs_failaddr_t failaddr)
444{
445 struct xfs_mount *mp = bp->b_mount;
446 xfs_failaddr_t fa;
447 int sz;
448
449 fa = failaddr ? failaddr : __return_address;
450 __xfs_buf_ioerror(bp, error, fa);
451
452 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
453 "Metadata %s detected at %pS, %s block 0x%llx %s",
454 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
455 fa, bp->b_ops->name, xfs_buf_daddr(bp), name);
456
457 xfs_alert(mp, "Unmount and run xfs_repair");
458
459 if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
460 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz);
461 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
462 sz);
463 xfs_hex_dump(buf, sz);
464 }
465
466 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
467 xfs_stack_trace();
468}
469
470/*
471 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid
472 * values, and omit the stack trace unless the error level is tuned high.
473 */
474void
475xfs_verifier_error(
476 struct xfs_buf *bp,
477 int error,
478 xfs_failaddr_t failaddr)
479{
480 return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0),
481 XFS_CORRUPTION_DUMP_LEN, failaddr);
482}
483
484/*
485 * Warnings for inode corruption problems. Don't bother with the stack
486 * trace unless the error level is turned up high.
487 */
488void
489xfs_inode_verifier_error(
490 struct xfs_inode *ip,
491 int error,
492 const char *name,
493 const void *buf,
494 size_t bufsz,
495 xfs_failaddr_t failaddr)
496{
497 struct xfs_mount *mp = ip->i_mount;
498 xfs_failaddr_t fa;
499 int sz;
500
501 fa = failaddr ? failaddr : __return_address;
502
503 xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s",
504 error == -EFSBADCRC ? "CRC error" : "corruption",
505 fa, ip->i_ino, name);
506
507 xfs_alert(mp, "Unmount and run xfs_repair");
508
509 if (buf && xfs_error_level >= XFS_ERRLEVEL_LOW) {
510 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz);
511 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
512 sz);
513 xfs_hex_dump(buf, sz);
514 }
515
516 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
517 xfs_stack_trace();
518}
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
20static 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
58struct xfs_errortag_attr {
59 struct attribute attr;
60 unsigned int tag;
61};
62
63static inline struct xfs_errortag_attr *
64to_attr(struct attribute *attr)
65{
66 return container_of(attr, struct xfs_errortag_attr, attr);
67}
68
69static inline struct xfs_mount *
70to_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
77STATIC ssize_t
78xfs_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
103STATIC ssize_t
104xfs_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
116static 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) \
122static 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
130XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR);
131XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1);
132XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2);
133XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3);
134XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4);
135XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5);
136XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6);
137XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF);
138XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK);
139XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK);
140XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF);
141XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI);
142XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP);
143XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK);
144XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE);
145XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE);
146XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK);
147XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR);
148XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR);
149XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR);
150XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR);
151XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT);
152XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT);
153XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE);
154XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE);
155XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE);
156XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE);
157XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL);
158XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES);
159XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC);
160XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN);
161XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF);
162XFS_ERRORTAG_ATTR_RW(force_repair, XFS_ERRTAG_FORCE_SCRUB_REPAIR);
163XFS_ERRORTAG_ATTR_RW(bad_summary, XFS_ERRTAG_FORCE_SUMMARY_RECALC);
164XFS_ERRORTAG_ATTR_RW(iunlink_fallback, XFS_ERRTAG_IUNLINK_FALLBACK);
165
166static 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
205static 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
211int
212xfs_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
224void
225xfs_errortag_del(
226 struct xfs_mount *mp)
227{
228 xfs_sysfs_del(&mp->m_errortag_kobj);
229 kmem_free(mp->m_errortag);
230}
231
232bool
233xfs_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_fsname);
261 return true;
262}
263
264int
265xfs_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
275int
276xfs_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
288int
289xfs_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
300int
301xfs_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
309void
310xfs_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
327void
328xfs_corruption_error(
329 const char *tag,
330 int level,
331 struct xfs_mount *mp,
332 void *buf,
333 size_t bufsize,
334 const char *filename,
335 int linenum,
336 xfs_failaddr_t failaddr)
337{
338 if (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 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid
346 * values, and omit the stack trace unless the error level is tuned high.
347 */
348void
349xfs_buf_verifier_error(
350 struct xfs_buf *bp,
351 int error,
352 const char *name,
353 void *buf,
354 size_t bufsz,
355 xfs_failaddr_t failaddr)
356{
357 struct xfs_mount *mp = bp->b_mount;
358 xfs_failaddr_t fa;
359 int sz;
360
361 fa = failaddr ? failaddr : __return_address;
362 __xfs_buf_ioerror(bp, error, fa);
363
364 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
365 "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 */
386void
387xfs_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 */
400void
401xfs_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}