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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_SLEEP | 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
244
245
246
247
248
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
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
346
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
384
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
398
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}
431
