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_error.h"
25 #include "xfs_sysfs.h"
26
27 #ifdef DEBUG
28
29 static unsigned int xfs_errortag_random_default[] = {
30 XFS_RANDOM_DEFAULT,
31 XFS_RANDOM_IFLUSH_1,
32 XFS_RANDOM_IFLUSH_2,
33 XFS_RANDOM_IFLUSH_3,
34 XFS_RANDOM_IFLUSH_4,
35 XFS_RANDOM_IFLUSH_5,
36 XFS_RANDOM_IFLUSH_6,
37 XFS_RANDOM_DA_READ_BUF,
38 XFS_RANDOM_BTREE_CHECK_LBLOCK,
39 XFS_RANDOM_BTREE_CHECK_SBLOCK,
40 XFS_RANDOM_ALLOC_READ_AGF,
41 XFS_RANDOM_IALLOC_READ_AGI,
42 XFS_RANDOM_ITOBP_INOTOBP,
43 XFS_RANDOM_IUNLINK,
44 XFS_RANDOM_IUNLINK_REMOVE,
45 XFS_RANDOM_DIR_INO_VALIDATE,
46 XFS_RANDOM_BULKSTAT_READ_CHUNK,
47 XFS_RANDOM_IODONE_IOERR,
48 XFS_RANDOM_STRATREAD_IOERR,
49 XFS_RANDOM_STRATCMPL_IOERR,
50 XFS_RANDOM_DIOWRITE_IOERR,
51 XFS_RANDOM_BMAPIFORMAT,
52 XFS_RANDOM_FREE_EXTENT,
53 XFS_RANDOM_RMAP_FINISH_ONE,
54 XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE,
55 XFS_RANDOM_REFCOUNT_FINISH_ONE,
56 XFS_RANDOM_BMAP_FINISH_ONE,
57 XFS_RANDOM_AG_RESV_CRITICAL,
58 XFS_RANDOM_DROP_WRITES,
59 XFS_RANDOM_LOG_BAD_CRC,
60 XFS_RANDOM_LOG_ITEM_PIN,
61 };
62
63 struct xfs_errortag_attr {
64 struct attribute attr;
65 unsigned int tag;
66 };
67
68 static inline struct xfs_errortag_attr *
to_attr(struct attribute * attr)69 to_attr(struct attribute *attr)
70 {
71 return container_of(attr, struct xfs_errortag_attr, attr);
72 }
73
74 static inline struct xfs_mount *
to_mp(struct kobject * kobject)75 to_mp(struct kobject *kobject)
76 {
77 struct xfs_kobj *kobj = to_kobj(kobject);
78
79 return container_of(kobj, struct xfs_mount, m_errortag_kobj);
80 }
81
82 STATIC ssize_t
xfs_errortag_attr_store(struct kobject * kobject,struct attribute * attr,const char * buf,size_t count)83 xfs_errortag_attr_store(
84 struct kobject *kobject,
85 struct attribute *attr,
86 const char *buf,
87 size_t count)
88 {
89 struct xfs_mount *mp = to_mp(kobject);
90 struct xfs_errortag_attr *xfs_attr = to_attr(attr);
91 int ret;
92 unsigned int val;
93
94 if (strcmp(buf, "default") == 0) {
95 val = xfs_errortag_random_default[xfs_attr->tag];
96 } else {
97 ret = kstrtouint(buf, 0, &val);
98 if (ret)
99 return ret;
100 }
101
102 ret = xfs_errortag_set(mp, xfs_attr->tag, val);
103 if (ret)
104 return ret;
105 return count;
106 }
107
108 STATIC ssize_t
xfs_errortag_attr_show(struct kobject * kobject,struct attribute * attr,char * buf)109 xfs_errortag_attr_show(
110 struct kobject *kobject,
111 struct attribute *attr,
112 char *buf)
113 {
114 struct xfs_mount *mp = to_mp(kobject);
115 struct xfs_errortag_attr *xfs_attr = to_attr(attr);
116
117 return snprintf(buf, PAGE_SIZE, "%u\n",
118 xfs_errortag_get(mp, xfs_attr->tag));
119 }
120
121 static const struct sysfs_ops xfs_errortag_sysfs_ops = {
122 .show = xfs_errortag_attr_show,
123 .store = xfs_errortag_attr_store,
124 };
125
126 #define XFS_ERRORTAG_ATTR_RW(_name, _tag) \
127 static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \
128 .attr = {.name = __stringify(_name), \
129 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \
130 .tag = (_tag), \
131 }
132
133 #define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr
134
135 XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR);
136 XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1);
137 XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2);
138 XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3);
139 XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4);
140 XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5);
141 XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6);
142 XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF);
143 XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK);
144 XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK);
145 XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF);
146 XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI);
147 XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP);
148 XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK);
149 XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE);
150 XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE);
151 XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK);
152 XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR);
153 XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR);
154 XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR);
155 XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR);
156 XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT);
157 XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT);
158 XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE);
159 XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE);
160 XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE);
161 XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE);
162 XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL);
163 XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES);
164 XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC);
165 XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN);
166
167 static struct attribute *xfs_errortag_attrs[] = {
168 XFS_ERRORTAG_ATTR_LIST(noerror),
169 XFS_ERRORTAG_ATTR_LIST(iflush1),
170 XFS_ERRORTAG_ATTR_LIST(iflush2),
171 XFS_ERRORTAG_ATTR_LIST(iflush3),
172 XFS_ERRORTAG_ATTR_LIST(iflush4),
173 XFS_ERRORTAG_ATTR_LIST(iflush5),
174 XFS_ERRORTAG_ATTR_LIST(iflush6),
175 XFS_ERRORTAG_ATTR_LIST(dareadbuf),
176 XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk),
177 XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk),
178 XFS_ERRORTAG_ATTR_LIST(readagf),
179 XFS_ERRORTAG_ATTR_LIST(readagi),
180 XFS_ERRORTAG_ATTR_LIST(itobp),
181 XFS_ERRORTAG_ATTR_LIST(iunlink),
182 XFS_ERRORTAG_ATTR_LIST(iunlinkrm),
183 XFS_ERRORTAG_ATTR_LIST(dirinovalid),
184 XFS_ERRORTAG_ATTR_LIST(bulkstat),
185 XFS_ERRORTAG_ATTR_LIST(logiodone),
186 XFS_ERRORTAG_ATTR_LIST(stratread),
187 XFS_ERRORTAG_ATTR_LIST(stratcmpl),
188 XFS_ERRORTAG_ATTR_LIST(diowrite),
189 XFS_ERRORTAG_ATTR_LIST(bmapifmt),
190 XFS_ERRORTAG_ATTR_LIST(free_extent),
191 XFS_ERRORTAG_ATTR_LIST(rmap_finish_one),
192 XFS_ERRORTAG_ATTR_LIST(refcount_continue_update),
193 XFS_ERRORTAG_ATTR_LIST(refcount_finish_one),
194 XFS_ERRORTAG_ATTR_LIST(bmap_finish_one),
195 XFS_ERRORTAG_ATTR_LIST(ag_resv_critical),
196 XFS_ERRORTAG_ATTR_LIST(drop_writes),
197 XFS_ERRORTAG_ATTR_LIST(log_bad_crc),
198 XFS_ERRORTAG_ATTR_LIST(log_item_pin),
199 NULL,
200 };
201
202 struct kobj_type xfs_errortag_ktype = {
203 .release = xfs_sysfs_release,
204 .sysfs_ops = &xfs_errortag_sysfs_ops,
205 .default_attrs = xfs_errortag_attrs,
206 };
207
208 int
xfs_errortag_init(struct xfs_mount * mp)209 xfs_errortag_init(
210 struct xfs_mount *mp)
211 {
212 mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX,
213 KM_SLEEP | KM_MAYFAIL);
214 if (!mp->m_errortag)
215 return -ENOMEM;
216
217 return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
218 &mp->m_kobj, "errortag");
219 }
220
221 void
xfs_errortag_del(struct xfs_mount * mp)222 xfs_errortag_del(
223 struct xfs_mount *mp)
224 {
225 xfs_sysfs_del(&mp->m_errortag_kobj);
226 kmem_free(mp->m_errortag);
227 }
228
229 bool
xfs_errortag_test(struct xfs_mount * mp,const char * expression,const char * file,int line,unsigned int error_tag)230 xfs_errortag_test(
231 struct xfs_mount *mp,
232 const char *expression,
233 const char *file,
234 int line,
235 unsigned int error_tag)
236 {
237 unsigned int randfactor;
238
239 /*
240 * To be able to use error injection anywhere, we need to ensure error
241 * injection mechanism is already initialized.
242 *
243 * Code paths like I/O completion can be called before the
244 * initialization is complete, but be able to inject errors in such
245 * places is still useful.
246 */
247 if (!mp->m_errortag)
248 return false;
249
250 ASSERT(error_tag < XFS_ERRTAG_MAX);
251 randfactor = mp->m_errortag[error_tag];
252 if (!randfactor || prandom_u32() % randfactor)
253 return false;
254
255 xfs_warn_ratelimited(mp,
256 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
257 expression, file, line, mp->m_fsname);
258 return true;
259 }
260
261 int
xfs_errortag_get(struct xfs_mount * mp,unsigned int error_tag)262 xfs_errortag_get(
263 struct xfs_mount *mp,
264 unsigned int error_tag)
265 {
266 if (error_tag >= XFS_ERRTAG_MAX)
267 return -EINVAL;
268
269 return mp->m_errortag[error_tag];
270 }
271
272 int
xfs_errortag_set(struct xfs_mount * mp,unsigned int error_tag,unsigned int tag_value)273 xfs_errortag_set(
274 struct xfs_mount *mp,
275 unsigned int error_tag,
276 unsigned int tag_value)
277 {
278 if (error_tag >= XFS_ERRTAG_MAX)
279 return -EINVAL;
280
281 mp->m_errortag[error_tag] = tag_value;
282 return 0;
283 }
284
285 int
xfs_errortag_add(struct xfs_mount * mp,unsigned int error_tag)286 xfs_errortag_add(
287 struct xfs_mount *mp,
288 unsigned int error_tag)
289 {
290 if (error_tag >= XFS_ERRTAG_MAX)
291 return -EINVAL;
292
293 return xfs_errortag_set(mp, error_tag,
294 xfs_errortag_random_default[error_tag]);
295 }
296
297 int
xfs_errortag_clearall(struct xfs_mount * mp)298 xfs_errortag_clearall(
299 struct xfs_mount *mp)
300 {
301 memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX);
302 return 0;
303 }
304 #endif /* DEBUG */
305
306 void
xfs_error_report(const char * tag,int level,struct xfs_mount * mp,const char * filename,int linenum,void * ra)307 xfs_error_report(
308 const char *tag,
309 int level,
310 struct xfs_mount *mp,
311 const char *filename,
312 int linenum,
313 void *ra)
314 {
315 if (level <= xfs_error_level) {
316 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
317 "Internal error %s at line %d of file %s. Caller %pS",
318 tag, linenum, filename, ra);
319
320 xfs_stack_trace();
321 }
322 }
323
324 void
xfs_corruption_error(const char * tag,int level,struct xfs_mount * mp,void * p,const char * filename,int linenum,void * ra)325 xfs_corruption_error(
326 const char *tag,
327 int level,
328 struct xfs_mount *mp,
329 void *p,
330 const char *filename,
331 int linenum,
332 void *ra)
333 {
334 if (level <= xfs_error_level)
335 xfs_hex_dump(p, 64);
336 xfs_error_report(tag, level, mp, filename, linenum, ra);
337 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
338 }
339
340 /*
341 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid
342 * values, and omit the stack trace unless the error level is tuned high.
343 */
344 void
xfs_verifier_error(struct xfs_buf * bp)345 xfs_verifier_error(
346 struct xfs_buf *bp)
347 {
348 struct xfs_mount *mp = bp->b_target->bt_mount;
349
350 xfs_alert(mp, "Metadata %s detected at %pS, %s block 0x%llx",
351 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
352 __return_address, bp->b_ops->name, bp->b_bn);
353
354 xfs_alert(mp, "Unmount and run xfs_repair");
355
356 if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
357 xfs_alert(mp, "First 64 bytes of corrupted metadata buffer:");
358 xfs_hex_dump(xfs_buf_offset(bp, 0), 64);
359 }
360
361 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
362 xfs_stack_trace();
363 }
364