Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
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 XFS_RANDOM_BUF_IOERROR,
57 XFS_RANDOM_REDUCE_MAX_IEXTENTS,
58 XFS_RANDOM_BMAP_ALLOC_MINLEN_EXTENT,
59 XFS_RANDOM_AG_RESV_FAIL,
60};
61
62struct xfs_errortag_attr {
63 struct attribute attr;
64 unsigned int tag;
65};
66
67static inline struct xfs_errortag_attr *
68to_attr(struct attribute *attr)
69{
70 return container_of(attr, struct xfs_errortag_attr, attr);
71}
72
73static inline struct xfs_mount *
74to_mp(struct kobject *kobject)
75{
76 struct xfs_kobj *kobj = to_kobj(kobject);
77
78 return container_of(kobj, struct xfs_mount, m_errortag_kobj);
79}
80
81STATIC ssize_t
82xfs_errortag_attr_store(
83 struct kobject *kobject,
84 struct attribute *attr,
85 const char *buf,
86 size_t count)
87{
88 struct xfs_mount *mp = to_mp(kobject);
89 struct xfs_errortag_attr *xfs_attr = to_attr(attr);
90 int ret;
91 unsigned int val;
92
93 if (strcmp(buf, "default") == 0) {
94 val = xfs_errortag_random_default[xfs_attr->tag];
95 } else {
96 ret = kstrtouint(buf, 0, &val);
97 if (ret)
98 return ret;
99 }
100
101 ret = xfs_errortag_set(mp, xfs_attr->tag, val);
102 if (ret)
103 return ret;
104 return count;
105}
106
107STATIC ssize_t
108xfs_errortag_attr_show(
109 struct kobject *kobject,
110 struct attribute *attr,
111 char *buf)
112{
113 struct xfs_mount *mp = to_mp(kobject);
114 struct xfs_errortag_attr *xfs_attr = to_attr(attr);
115
116 return snprintf(buf, PAGE_SIZE, "%u\n",
117 xfs_errortag_get(mp, xfs_attr->tag));
118}
119
120static const struct sysfs_ops xfs_errortag_sysfs_ops = {
121 .show = xfs_errortag_attr_show,
122 .store = xfs_errortag_attr_store,
123};
124
125#define XFS_ERRORTAG_ATTR_RW(_name, _tag) \
126static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \
127 .attr = {.name = __stringify(_name), \
128 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \
129 .tag = (_tag), \
130}
131
132#define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr
133
134XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR);
135XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1);
136XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2);
137XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3);
138XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4);
139XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5);
140XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6);
141XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF);
142XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK);
143XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK);
144XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF);
145XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI);
146XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP);
147XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK);
148XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE);
149XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE);
150XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK);
151XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR);
152XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR);
153XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR);
154XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR);
155XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT);
156XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT);
157XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE);
158XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE);
159XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE);
160XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE);
161XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL);
162XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES);
163XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC);
164XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN);
165XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF);
166XFS_ERRORTAG_ATTR_RW(force_repair, XFS_ERRTAG_FORCE_SCRUB_REPAIR);
167XFS_ERRORTAG_ATTR_RW(bad_summary, XFS_ERRTAG_FORCE_SUMMARY_RECALC);
168XFS_ERRORTAG_ATTR_RW(iunlink_fallback, XFS_ERRTAG_IUNLINK_FALLBACK);
169XFS_ERRORTAG_ATTR_RW(buf_ioerror, XFS_ERRTAG_BUF_IOERROR);
170XFS_ERRORTAG_ATTR_RW(reduce_max_iextents, XFS_ERRTAG_REDUCE_MAX_IEXTENTS);
171XFS_ERRORTAG_ATTR_RW(bmap_alloc_minlen_extent, XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT);
172XFS_ERRORTAG_ATTR_RW(ag_resv_fail, XFS_ERRTAG_AG_RESV_FAIL);
173
174static struct attribute *xfs_errortag_attrs[] = {
175 XFS_ERRORTAG_ATTR_LIST(noerror),
176 XFS_ERRORTAG_ATTR_LIST(iflush1),
177 XFS_ERRORTAG_ATTR_LIST(iflush2),
178 XFS_ERRORTAG_ATTR_LIST(iflush3),
179 XFS_ERRORTAG_ATTR_LIST(iflush4),
180 XFS_ERRORTAG_ATTR_LIST(iflush5),
181 XFS_ERRORTAG_ATTR_LIST(iflush6),
182 XFS_ERRORTAG_ATTR_LIST(dareadbuf),
183 XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk),
184 XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk),
185 XFS_ERRORTAG_ATTR_LIST(readagf),
186 XFS_ERRORTAG_ATTR_LIST(readagi),
187 XFS_ERRORTAG_ATTR_LIST(itobp),
188 XFS_ERRORTAG_ATTR_LIST(iunlink),
189 XFS_ERRORTAG_ATTR_LIST(iunlinkrm),
190 XFS_ERRORTAG_ATTR_LIST(dirinovalid),
191 XFS_ERRORTAG_ATTR_LIST(bulkstat),
192 XFS_ERRORTAG_ATTR_LIST(logiodone),
193 XFS_ERRORTAG_ATTR_LIST(stratread),
194 XFS_ERRORTAG_ATTR_LIST(stratcmpl),
195 XFS_ERRORTAG_ATTR_LIST(diowrite),
196 XFS_ERRORTAG_ATTR_LIST(bmapifmt),
197 XFS_ERRORTAG_ATTR_LIST(free_extent),
198 XFS_ERRORTAG_ATTR_LIST(rmap_finish_one),
199 XFS_ERRORTAG_ATTR_LIST(refcount_continue_update),
200 XFS_ERRORTAG_ATTR_LIST(refcount_finish_one),
201 XFS_ERRORTAG_ATTR_LIST(bmap_finish_one),
202 XFS_ERRORTAG_ATTR_LIST(ag_resv_critical),
203 XFS_ERRORTAG_ATTR_LIST(drop_writes),
204 XFS_ERRORTAG_ATTR_LIST(log_bad_crc),
205 XFS_ERRORTAG_ATTR_LIST(log_item_pin),
206 XFS_ERRORTAG_ATTR_LIST(buf_lru_ref),
207 XFS_ERRORTAG_ATTR_LIST(force_repair),
208 XFS_ERRORTAG_ATTR_LIST(bad_summary),
209 XFS_ERRORTAG_ATTR_LIST(iunlink_fallback),
210 XFS_ERRORTAG_ATTR_LIST(buf_ioerror),
211 XFS_ERRORTAG_ATTR_LIST(reduce_max_iextents),
212 XFS_ERRORTAG_ATTR_LIST(bmap_alloc_minlen_extent),
213 XFS_ERRORTAG_ATTR_LIST(ag_resv_fail),
214 NULL,
215};
216
217static struct kobj_type xfs_errortag_ktype = {
218 .release = xfs_sysfs_release,
219 .sysfs_ops = &xfs_errortag_sysfs_ops,
220 .default_attrs = xfs_errortag_attrs,
221};
222
223int
224xfs_errortag_init(
225 struct xfs_mount *mp)
226{
227 mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX,
228 KM_MAYFAIL);
229 if (!mp->m_errortag)
230 return -ENOMEM;
231
232 return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
233 &mp->m_kobj, "errortag");
234}
235
236void
237xfs_errortag_del(
238 struct xfs_mount *mp)
239{
240 xfs_sysfs_del(&mp->m_errortag_kobj);
241 kmem_free(mp->m_errortag);
242}
243
244bool
245xfs_errortag_test(
246 struct xfs_mount *mp,
247 const char *expression,
248 const char *file,
249 int line,
250 unsigned int error_tag)
251{
252 unsigned int randfactor;
253
254 /*
255 * To be able to use error injection anywhere, we need to ensure error
256 * injection mechanism is already initialized.
257 *
258 * Code paths like I/O completion can be called before the
259 * initialization is complete, but be able to inject errors in such
260 * places is still useful.
261 */
262 if (!mp->m_errortag)
263 return false;
264
265 ASSERT(error_tag < XFS_ERRTAG_MAX);
266 randfactor = mp->m_errortag[error_tag];
267 if (!randfactor || prandom_u32() % randfactor)
268 return false;
269
270 xfs_warn_ratelimited(mp,
271"Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
272 expression, file, line, mp->m_super->s_id);
273 return true;
274}
275
276int
277xfs_errortag_get(
278 struct xfs_mount *mp,
279 unsigned int error_tag)
280{
281 if (error_tag >= XFS_ERRTAG_MAX)
282 return -EINVAL;
283
284 return mp->m_errortag[error_tag];
285}
286
287int
288xfs_errortag_set(
289 struct xfs_mount *mp,
290 unsigned int error_tag,
291 unsigned int tag_value)
292{
293 if (error_tag >= XFS_ERRTAG_MAX)
294 return -EINVAL;
295
296 mp->m_errortag[error_tag] = tag_value;
297 return 0;
298}
299
300int
301xfs_errortag_add(
302 struct xfs_mount *mp,
303 unsigned int error_tag)
304{
305 BUILD_BUG_ON(ARRAY_SIZE(xfs_errortag_random_default) != XFS_ERRTAG_MAX);
306
307 if (error_tag >= XFS_ERRTAG_MAX)
308 return -EINVAL;
309
310 return xfs_errortag_set(mp, error_tag,
311 xfs_errortag_random_default[error_tag]);
312}
313
314int
315xfs_errortag_clearall(
316 struct xfs_mount *mp)
317{
318 memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX);
319 return 0;
320}
321#endif /* DEBUG */
322
323void
324xfs_error_report(
325 const char *tag,
326 int level,
327 struct xfs_mount *mp,
328 const char *filename,
329 int linenum,
330 xfs_failaddr_t failaddr)
331{
332 if (level <= xfs_error_level) {
333 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
334 "Internal error %s at line %d of file %s. Caller %pS",
335 tag, linenum, filename, failaddr);
336
337 xfs_stack_trace();
338 }
339}
340
341void
342xfs_corruption_error(
343 const char *tag,
344 int level,
345 struct xfs_mount *mp,
346 const void *buf,
347 size_t bufsize,
348 const char *filename,
349 int linenum,
350 xfs_failaddr_t failaddr)
351{
352 if (buf && level <= xfs_error_level)
353 xfs_hex_dump(buf, bufsize);
354 xfs_error_report(tag, level, mp, filename, linenum, failaddr);
355 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
356}
357
358/*
359 * Complain about the kinds of metadata corruption that we can't detect from a
360 * verifier, such as incorrect inter-block relationship data. Does not set
361 * bp->b_error.
362 *
363 * Call xfs_buf_mark_corrupt, not this function.
364 */
365void
366xfs_buf_corruption_error(
367 struct xfs_buf *bp,
368 xfs_failaddr_t fa)
369{
370 struct xfs_mount *mp = bp->b_mount;
371
372 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
373 "Metadata corruption detected at %pS, %s block 0x%llx",
374 fa, bp->b_ops->name, xfs_buf_daddr(bp));
375
376 xfs_alert(mp, "Unmount and run xfs_repair");
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_buf_verifier_error(
388 struct xfs_buf *bp,
389 int error,
390 const char *name,
391 const void *buf,
392 size_t bufsz,
393 xfs_failaddr_t failaddr)
394{
395 struct xfs_mount *mp = bp->b_mount;
396 xfs_failaddr_t fa;
397 int sz;
398
399 fa = failaddr ? failaddr : __return_address;
400 __xfs_buf_ioerror(bp, error, fa);
401
402 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
403 "Metadata %s detected at %pS, %s block 0x%llx %s",
404 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
405 fa, bp->b_ops->name, xfs_buf_daddr(bp), name);
406
407 xfs_alert(mp, "Unmount and run xfs_repair");
408
409 if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
410 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz);
411 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
412 sz);
413 xfs_hex_dump(buf, sz);
414 }
415
416 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
417 xfs_stack_trace();
418}
419
420/*
421 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid
422 * values, and omit the stack trace unless the error level is tuned high.
423 */
424void
425xfs_verifier_error(
426 struct xfs_buf *bp,
427 int error,
428 xfs_failaddr_t failaddr)
429{
430 return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0),
431 XFS_CORRUPTION_DUMP_LEN, failaddr);
432}
433
434/*
435 * Warnings for inode corruption problems. Don't bother with the stack
436 * trace unless the error level is turned up high.
437 */
438void
439xfs_inode_verifier_error(
440 struct xfs_inode *ip,
441 int error,
442 const char *name,
443 const void *buf,
444 size_t bufsz,
445 xfs_failaddr_t failaddr)
446{
447 struct xfs_mount *mp = ip->i_mount;
448 xfs_failaddr_t fa;
449 int sz;
450
451 fa = failaddr ? failaddr : __return_address;
452
453 xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s",
454 error == -EFSBADCRC ? "CRC error" : "corruption",
455 fa, ip->i_ino, name);
456
457 xfs_alert(mp, "Unmount and run xfs_repair");
458
459 if (buf && 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}