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v4.17
 
  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_errortag.h"
 25#include "xfs_error.h"
 26#include "xfs_sysfs.h"
 27#include "xfs_inode.h"
 28
 29#ifdef DEBUG
 30
 31static unsigned int xfs_errortag_random_default[] = {
 32	XFS_RANDOM_DEFAULT,
 33	XFS_RANDOM_IFLUSH_1,
 34	XFS_RANDOM_IFLUSH_2,
 35	XFS_RANDOM_IFLUSH_3,
 36	XFS_RANDOM_IFLUSH_4,
 37	XFS_RANDOM_IFLUSH_5,
 38	XFS_RANDOM_IFLUSH_6,
 39	XFS_RANDOM_DA_READ_BUF,
 40	XFS_RANDOM_BTREE_CHECK_LBLOCK,
 41	XFS_RANDOM_BTREE_CHECK_SBLOCK,
 42	XFS_RANDOM_ALLOC_READ_AGF,
 43	XFS_RANDOM_IALLOC_READ_AGI,
 44	XFS_RANDOM_ITOBP_INOTOBP,
 45	XFS_RANDOM_IUNLINK,
 46	XFS_RANDOM_IUNLINK_REMOVE,
 47	XFS_RANDOM_DIR_INO_VALIDATE,
 48	XFS_RANDOM_BULKSTAT_READ_CHUNK,
 49	XFS_RANDOM_IODONE_IOERR,
 50	XFS_RANDOM_STRATREAD_IOERR,
 51	XFS_RANDOM_STRATCMPL_IOERR,
 52	XFS_RANDOM_DIOWRITE_IOERR,
 53	XFS_RANDOM_BMAPIFORMAT,
 54	XFS_RANDOM_FREE_EXTENT,
 55	XFS_RANDOM_RMAP_FINISH_ONE,
 56	XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE,
 57	XFS_RANDOM_REFCOUNT_FINISH_ONE,
 58	XFS_RANDOM_BMAP_FINISH_ONE,
 59	XFS_RANDOM_AG_RESV_CRITICAL,
 60	XFS_RANDOM_DROP_WRITES,
 61	XFS_RANDOM_LOG_BAD_CRC,
 62	XFS_RANDOM_LOG_ITEM_PIN,
 63	XFS_RANDOM_BUF_LRU_REF,
 
 
 
 
 
 
 
 
 
 
 
 
 64};
 65
 66struct xfs_errortag_attr {
 67	struct attribute	attr;
 68	unsigned int		tag;
 69};
 70
 71static inline struct xfs_errortag_attr *
 72to_attr(struct attribute *attr)
 73{
 74	return container_of(attr, struct xfs_errortag_attr, attr);
 75}
 76
 77static inline struct xfs_mount *
 78to_mp(struct kobject *kobject)
 79{
 80	struct xfs_kobj *kobj = to_kobj(kobject);
 81
 82	return container_of(kobj, struct xfs_mount, m_errortag_kobj);
 83}
 84
 85STATIC ssize_t
 86xfs_errortag_attr_store(
 87	struct kobject		*kobject,
 88	struct attribute	*attr,
 89	const char		*buf,
 90	size_t			count)
 91{
 92	struct xfs_mount	*mp = to_mp(kobject);
 93	struct xfs_errortag_attr *xfs_attr = to_attr(attr);
 94	int			ret;
 95	unsigned int		val;
 96
 97	if (strcmp(buf, "default") == 0) {
 98		val = xfs_errortag_random_default[xfs_attr->tag];
 99	} else {
100		ret = kstrtouint(buf, 0, &val);
101		if (ret)
102			return ret;
103	}
104
105	ret = xfs_errortag_set(mp, xfs_attr->tag, val);
106	if (ret)
107		return ret;
108	return count;
109}
110
111STATIC ssize_t
112xfs_errortag_attr_show(
113	struct kobject		*kobject,
114	struct attribute	*attr,
115	char			*buf)
116{
117	struct xfs_mount	*mp = to_mp(kobject);
118	struct xfs_errortag_attr *xfs_attr = to_attr(attr);
119
120	return snprintf(buf, PAGE_SIZE, "%u\n",
121			xfs_errortag_get(mp, xfs_attr->tag));
122}
123
124static const struct sysfs_ops xfs_errortag_sysfs_ops = {
125	.show = xfs_errortag_attr_show,
126	.store = xfs_errortag_attr_store,
127};
128
129#define XFS_ERRORTAG_ATTR_RW(_name, _tag) \
130static struct xfs_errortag_attr xfs_errortag_attr_##_name = {		\
131	.attr = {.name = __stringify(_name),				\
132		 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) },	\
133	.tag	= (_tag),						\
134}
135
136#define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr
137
138XFS_ERRORTAG_ATTR_RW(noerror,		XFS_ERRTAG_NOERROR);
139XFS_ERRORTAG_ATTR_RW(iflush1,		XFS_ERRTAG_IFLUSH_1);
140XFS_ERRORTAG_ATTR_RW(iflush2,		XFS_ERRTAG_IFLUSH_2);
141XFS_ERRORTAG_ATTR_RW(iflush3,		XFS_ERRTAG_IFLUSH_3);
142XFS_ERRORTAG_ATTR_RW(iflush4,		XFS_ERRTAG_IFLUSH_4);
143XFS_ERRORTAG_ATTR_RW(iflush5,		XFS_ERRTAG_IFLUSH_5);
144XFS_ERRORTAG_ATTR_RW(iflush6,		XFS_ERRTAG_IFLUSH_6);
145XFS_ERRORTAG_ATTR_RW(dareadbuf,		XFS_ERRTAG_DA_READ_BUF);
146XFS_ERRORTAG_ATTR_RW(btree_chk_lblk,	XFS_ERRTAG_BTREE_CHECK_LBLOCK);
147XFS_ERRORTAG_ATTR_RW(btree_chk_sblk,	XFS_ERRTAG_BTREE_CHECK_SBLOCK);
148XFS_ERRORTAG_ATTR_RW(readagf,		XFS_ERRTAG_ALLOC_READ_AGF);
149XFS_ERRORTAG_ATTR_RW(readagi,		XFS_ERRTAG_IALLOC_READ_AGI);
150XFS_ERRORTAG_ATTR_RW(itobp,		XFS_ERRTAG_ITOBP_INOTOBP);
151XFS_ERRORTAG_ATTR_RW(iunlink,		XFS_ERRTAG_IUNLINK);
152XFS_ERRORTAG_ATTR_RW(iunlinkrm,		XFS_ERRTAG_IUNLINK_REMOVE);
153XFS_ERRORTAG_ATTR_RW(dirinovalid,	XFS_ERRTAG_DIR_INO_VALIDATE);
154XFS_ERRORTAG_ATTR_RW(bulkstat,		XFS_ERRTAG_BULKSTAT_READ_CHUNK);
155XFS_ERRORTAG_ATTR_RW(logiodone,		XFS_ERRTAG_IODONE_IOERR);
156XFS_ERRORTAG_ATTR_RW(stratread,		XFS_ERRTAG_STRATREAD_IOERR);
157XFS_ERRORTAG_ATTR_RW(stratcmpl,		XFS_ERRTAG_STRATCMPL_IOERR);
158XFS_ERRORTAG_ATTR_RW(diowrite,		XFS_ERRTAG_DIOWRITE_IOERR);
159XFS_ERRORTAG_ATTR_RW(bmapifmt,		XFS_ERRTAG_BMAPIFORMAT);
160XFS_ERRORTAG_ATTR_RW(free_extent,	XFS_ERRTAG_FREE_EXTENT);
161XFS_ERRORTAG_ATTR_RW(rmap_finish_one,	XFS_ERRTAG_RMAP_FINISH_ONE);
162XFS_ERRORTAG_ATTR_RW(refcount_continue_update,	XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE);
163XFS_ERRORTAG_ATTR_RW(refcount_finish_one,	XFS_ERRTAG_REFCOUNT_FINISH_ONE);
164XFS_ERRORTAG_ATTR_RW(bmap_finish_one,	XFS_ERRTAG_BMAP_FINISH_ONE);
165XFS_ERRORTAG_ATTR_RW(ag_resv_critical,	XFS_ERRTAG_AG_RESV_CRITICAL);
166XFS_ERRORTAG_ATTR_RW(drop_writes,	XFS_ERRTAG_DROP_WRITES);
167XFS_ERRORTAG_ATTR_RW(log_bad_crc,	XFS_ERRTAG_LOG_BAD_CRC);
168XFS_ERRORTAG_ATTR_RW(log_item_pin,	XFS_ERRTAG_LOG_ITEM_PIN);
169XFS_ERRORTAG_ATTR_RW(buf_lru_ref,	XFS_ERRTAG_BUF_LRU_REF);
 
 
 
 
 
 
 
 
 
 
 
 
170
171static struct attribute *xfs_errortag_attrs[] = {
172	XFS_ERRORTAG_ATTR_LIST(noerror),
173	XFS_ERRORTAG_ATTR_LIST(iflush1),
174	XFS_ERRORTAG_ATTR_LIST(iflush2),
175	XFS_ERRORTAG_ATTR_LIST(iflush3),
176	XFS_ERRORTAG_ATTR_LIST(iflush4),
177	XFS_ERRORTAG_ATTR_LIST(iflush5),
178	XFS_ERRORTAG_ATTR_LIST(iflush6),
179	XFS_ERRORTAG_ATTR_LIST(dareadbuf),
180	XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk),
181	XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk),
182	XFS_ERRORTAG_ATTR_LIST(readagf),
183	XFS_ERRORTAG_ATTR_LIST(readagi),
184	XFS_ERRORTAG_ATTR_LIST(itobp),
185	XFS_ERRORTAG_ATTR_LIST(iunlink),
186	XFS_ERRORTAG_ATTR_LIST(iunlinkrm),
187	XFS_ERRORTAG_ATTR_LIST(dirinovalid),
188	XFS_ERRORTAG_ATTR_LIST(bulkstat),
189	XFS_ERRORTAG_ATTR_LIST(logiodone),
190	XFS_ERRORTAG_ATTR_LIST(stratread),
191	XFS_ERRORTAG_ATTR_LIST(stratcmpl),
192	XFS_ERRORTAG_ATTR_LIST(diowrite),
193	XFS_ERRORTAG_ATTR_LIST(bmapifmt),
194	XFS_ERRORTAG_ATTR_LIST(free_extent),
195	XFS_ERRORTAG_ATTR_LIST(rmap_finish_one),
196	XFS_ERRORTAG_ATTR_LIST(refcount_continue_update),
197	XFS_ERRORTAG_ATTR_LIST(refcount_finish_one),
198	XFS_ERRORTAG_ATTR_LIST(bmap_finish_one),
199	XFS_ERRORTAG_ATTR_LIST(ag_resv_critical),
200	XFS_ERRORTAG_ATTR_LIST(drop_writes),
201	XFS_ERRORTAG_ATTR_LIST(log_bad_crc),
202	XFS_ERRORTAG_ATTR_LIST(log_item_pin),
203	XFS_ERRORTAG_ATTR_LIST(buf_lru_ref),
 
 
 
 
 
 
 
 
 
 
 
 
204	NULL,
205};
 
206
207static struct kobj_type xfs_errortag_ktype = {
208	.release = xfs_sysfs_release,
209	.sysfs_ops = &xfs_errortag_sysfs_ops,
210	.default_attrs = xfs_errortag_attrs,
211};
212
213int
214xfs_errortag_init(
215	struct xfs_mount	*mp)
216{
 
 
217	mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX,
218			KM_SLEEP | KM_MAYFAIL);
219	if (!mp->m_errortag)
220		return -ENOMEM;
221
222	return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
223			       &mp->m_kobj, "errortag");
 
 
 
224}
225
226void
227xfs_errortag_del(
228	struct xfs_mount	*mp)
229{
230	xfs_sysfs_del(&mp->m_errortag_kobj);
231	kmem_free(mp->m_errortag);
232}
233
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
234bool
235xfs_errortag_test(
236	struct xfs_mount	*mp,
237	const char		*expression,
238	const char		*file,
239	int			line,
240	unsigned int		error_tag)
241{
242	unsigned int		randfactor;
243
244	/*
245	 * To be able to use error injection anywhere, we need to ensure error
246	 * injection mechanism is already initialized.
247	 *
248	 * Code paths like I/O completion can be called before the
249	 * initialization is complete, but be able to inject errors in such
250	 * places is still useful.
251	 */
252	if (!mp->m_errortag)
253		return false;
254
255	ASSERT(error_tag < XFS_ERRTAG_MAX);
 
 
256	randfactor = mp->m_errortag[error_tag];
257	if (!randfactor || prandom_u32() % randfactor)
258		return false;
259
260	xfs_warn_ratelimited(mp,
261"Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
262			expression, file, line, mp->m_fsname);
263	return true;
264}
265
266int
267xfs_errortag_get(
268	struct xfs_mount	*mp,
269	unsigned int		error_tag)
270{
271	if (error_tag >= XFS_ERRTAG_MAX)
272		return -EINVAL;
273
274	return mp->m_errortag[error_tag];
275}
276
277int
278xfs_errortag_set(
279	struct xfs_mount	*mp,
280	unsigned int		error_tag,
281	unsigned int		tag_value)
282{
283	if (error_tag >= XFS_ERRTAG_MAX)
284		return -EINVAL;
285
286	mp->m_errortag[error_tag] = tag_value;
287	return 0;
288}
289
290int
291xfs_errortag_add(
292	struct xfs_mount	*mp,
293	unsigned int		error_tag)
294{
295	if (error_tag >= XFS_ERRTAG_MAX)
 
 
296		return -EINVAL;
297
298	return xfs_errortag_set(mp, error_tag,
299			xfs_errortag_random_default[error_tag]);
300}
301
302int
303xfs_errortag_clearall(
304	struct xfs_mount	*mp)
305{
306	memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX);
307	return 0;
308}
309#endif /* DEBUG */
310
311void
312xfs_error_report(
313	const char		*tag,
314	int			level,
315	struct xfs_mount	*mp,
316	const char		*filename,
317	int			linenum,
318	xfs_failaddr_t		failaddr)
319{
320	if (level <= xfs_error_level) {
321		xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
322		"Internal error %s at line %d of file %s.  Caller %pS",
323			    tag, linenum, filename, failaddr);
324
325		xfs_stack_trace();
326	}
327}
328
329void
330xfs_corruption_error(
331	const char		*tag,
332	int			level,
333	struct xfs_mount	*mp,
334	void			*p,
 
335	const char		*filename,
336	int			linenum,
337	xfs_failaddr_t		failaddr)
338{
339	if (level <= xfs_error_level)
340		xfs_hex_dump(p, XFS_CORRUPTION_DUMP_LEN);
341	xfs_error_report(tag, level, mp, filename, linenum, failaddr);
342	xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
343}
344
345/*
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
346 * Warnings specifically for verifier errors.  Differentiate CRC vs. invalid
347 * values, and omit the stack trace unless the error level is tuned high.
348 */
349void
350xfs_buf_verifier_error(
351	struct xfs_buf		*bp,
352	int			error,
353	const char		*name,
354	void			*buf,
355	size_t			bufsz,
356	xfs_failaddr_t		failaddr)
357{
358	struct xfs_mount	*mp = bp->b_target->bt_mount;
359	xfs_failaddr_t		fa;
360	int			sz;
361
362	fa = failaddr ? failaddr : __return_address;
363	__xfs_buf_ioerror(bp, error, fa);
364
365	xfs_alert(mp, "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}
v6.8
  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};
 66
 67struct xfs_errortag_attr {
 68	struct attribute	attr;
 69	unsigned int		tag;
 70};
 71
 72static inline struct xfs_errortag_attr *
 73to_attr(struct attribute *attr)
 74{
 75	return container_of(attr, struct xfs_errortag_attr, attr);
 76}
 77
 78static inline struct xfs_mount *
 79to_mp(struct kobject *kobject)
 80{
 81	struct xfs_kobj *kobj = to_kobj(kobject);
 82
 83	return container_of(kobj, struct xfs_mount, m_errortag_kobj);
 84}
 85
 86STATIC ssize_t
 87xfs_errortag_attr_store(
 88	struct kobject		*kobject,
 89	struct attribute	*attr,
 90	const char		*buf,
 91	size_t			count)
 92{
 93	struct xfs_mount	*mp = to_mp(kobject);
 94	struct xfs_errortag_attr *xfs_attr = to_attr(attr);
 95	int			ret;
 96	unsigned int		val;
 97
 98	if (strcmp(buf, "default") == 0) {
 99		val = xfs_errortag_random_default[xfs_attr->tag];
100	} else {
101		ret = kstrtouint(buf, 0, &val);
102		if (ret)
103			return ret;
104	}
105
106	ret = xfs_errortag_set(mp, xfs_attr->tag, val);
107	if (ret)
108		return ret;
109	return count;
110}
111
112STATIC ssize_t
113xfs_errortag_attr_show(
114	struct kobject		*kobject,
115	struct attribute	*attr,
116	char			*buf)
117{
118	struct xfs_mount	*mp = to_mp(kobject);
119	struct xfs_errortag_attr *xfs_attr = to_attr(attr);
120
121	return snprintf(buf, PAGE_SIZE, "%u\n",
122			xfs_errortag_get(mp, xfs_attr->tag));
123}
124
125static const struct sysfs_ops xfs_errortag_sysfs_ops = {
126	.show = xfs_errortag_attr_show,
127	.store = xfs_errortag_attr_store,
128};
129
130#define XFS_ERRORTAG_ATTR_RW(_name, _tag) \
131static struct xfs_errortag_attr xfs_errortag_attr_##_name = {		\
132	.attr = {.name = __stringify(_name),				\
133		 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) },	\
134	.tag	= (_tag),						\
135}
136
137#define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr
138
139XFS_ERRORTAG_ATTR_RW(noerror,		XFS_ERRTAG_NOERROR);
140XFS_ERRORTAG_ATTR_RW(iflush1,		XFS_ERRTAG_IFLUSH_1);
141XFS_ERRORTAG_ATTR_RW(iflush2,		XFS_ERRTAG_IFLUSH_2);
142XFS_ERRORTAG_ATTR_RW(iflush3,		XFS_ERRTAG_IFLUSH_3);
143XFS_ERRORTAG_ATTR_RW(iflush4,		XFS_ERRTAG_IFLUSH_4);
144XFS_ERRORTAG_ATTR_RW(iflush5,		XFS_ERRTAG_IFLUSH_5);
145XFS_ERRORTAG_ATTR_RW(iflush6,		XFS_ERRTAG_IFLUSH_6);
146XFS_ERRORTAG_ATTR_RW(dareadbuf,		XFS_ERRTAG_DA_READ_BUF);
147XFS_ERRORTAG_ATTR_RW(btree_chk_lblk,	XFS_ERRTAG_BTREE_CHECK_LBLOCK);
148XFS_ERRORTAG_ATTR_RW(btree_chk_sblk,	XFS_ERRTAG_BTREE_CHECK_SBLOCK);
149XFS_ERRORTAG_ATTR_RW(readagf,		XFS_ERRTAG_ALLOC_READ_AGF);
150XFS_ERRORTAG_ATTR_RW(readagi,		XFS_ERRTAG_IALLOC_READ_AGI);
151XFS_ERRORTAG_ATTR_RW(itobp,		XFS_ERRTAG_ITOBP_INOTOBP);
152XFS_ERRORTAG_ATTR_RW(iunlink,		XFS_ERRTAG_IUNLINK);
153XFS_ERRORTAG_ATTR_RW(iunlinkrm,		XFS_ERRTAG_IUNLINK_REMOVE);
154XFS_ERRORTAG_ATTR_RW(dirinovalid,	XFS_ERRTAG_DIR_INO_VALIDATE);
155XFS_ERRORTAG_ATTR_RW(bulkstat,		XFS_ERRTAG_BULKSTAT_READ_CHUNK);
156XFS_ERRORTAG_ATTR_RW(logiodone,		XFS_ERRTAG_IODONE_IOERR);
157XFS_ERRORTAG_ATTR_RW(stratread,		XFS_ERRTAG_STRATREAD_IOERR);
158XFS_ERRORTAG_ATTR_RW(stratcmpl,		XFS_ERRTAG_STRATCMPL_IOERR);
159XFS_ERRORTAG_ATTR_RW(diowrite,		XFS_ERRTAG_DIOWRITE_IOERR);
160XFS_ERRORTAG_ATTR_RW(bmapifmt,		XFS_ERRTAG_BMAPIFORMAT);
161XFS_ERRORTAG_ATTR_RW(free_extent,	XFS_ERRTAG_FREE_EXTENT);
162XFS_ERRORTAG_ATTR_RW(rmap_finish_one,	XFS_ERRTAG_RMAP_FINISH_ONE);
163XFS_ERRORTAG_ATTR_RW(refcount_continue_update,	XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE);
164XFS_ERRORTAG_ATTR_RW(refcount_finish_one,	XFS_ERRTAG_REFCOUNT_FINISH_ONE);
165XFS_ERRORTAG_ATTR_RW(bmap_finish_one,	XFS_ERRTAG_BMAP_FINISH_ONE);
166XFS_ERRORTAG_ATTR_RW(ag_resv_critical,	XFS_ERRTAG_AG_RESV_CRITICAL);
 
167XFS_ERRORTAG_ATTR_RW(log_bad_crc,	XFS_ERRTAG_LOG_BAD_CRC);
168XFS_ERRORTAG_ATTR_RW(log_item_pin,	XFS_ERRTAG_LOG_ITEM_PIN);
169XFS_ERRORTAG_ATTR_RW(buf_lru_ref,	XFS_ERRTAG_BUF_LRU_REF);
170XFS_ERRORTAG_ATTR_RW(force_repair,	XFS_ERRTAG_FORCE_SCRUB_REPAIR);
171XFS_ERRORTAG_ATTR_RW(bad_summary,	XFS_ERRTAG_FORCE_SUMMARY_RECALC);
172XFS_ERRORTAG_ATTR_RW(iunlink_fallback,	XFS_ERRTAG_IUNLINK_FALLBACK);
173XFS_ERRORTAG_ATTR_RW(buf_ioerror,	XFS_ERRTAG_BUF_IOERROR);
174XFS_ERRORTAG_ATTR_RW(reduce_max_iextents,	XFS_ERRTAG_REDUCE_MAX_IEXTENTS);
175XFS_ERRORTAG_ATTR_RW(bmap_alloc_minlen_extent,	XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT);
176XFS_ERRORTAG_ATTR_RW(ag_resv_fail, XFS_ERRTAG_AG_RESV_FAIL);
177XFS_ERRORTAG_ATTR_RW(larp,		XFS_ERRTAG_LARP);
178XFS_ERRORTAG_ATTR_RW(da_leaf_split,	XFS_ERRTAG_DA_LEAF_SPLIT);
179XFS_ERRORTAG_ATTR_RW(attr_leaf_to_node,	XFS_ERRTAG_ATTR_LEAF_TO_NODE);
180XFS_ERRORTAG_ATTR_RW(wb_delay_ms,	XFS_ERRTAG_WB_DELAY_MS);
181XFS_ERRORTAG_ATTR_RW(write_delay_ms,	XFS_ERRTAG_WRITE_DELAY_MS);
182
183static struct attribute *xfs_errortag_attrs[] = {
184	XFS_ERRORTAG_ATTR_LIST(noerror),
185	XFS_ERRORTAG_ATTR_LIST(iflush1),
186	XFS_ERRORTAG_ATTR_LIST(iflush2),
187	XFS_ERRORTAG_ATTR_LIST(iflush3),
188	XFS_ERRORTAG_ATTR_LIST(iflush4),
189	XFS_ERRORTAG_ATTR_LIST(iflush5),
190	XFS_ERRORTAG_ATTR_LIST(iflush6),
191	XFS_ERRORTAG_ATTR_LIST(dareadbuf),
192	XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk),
193	XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk),
194	XFS_ERRORTAG_ATTR_LIST(readagf),
195	XFS_ERRORTAG_ATTR_LIST(readagi),
196	XFS_ERRORTAG_ATTR_LIST(itobp),
197	XFS_ERRORTAG_ATTR_LIST(iunlink),
198	XFS_ERRORTAG_ATTR_LIST(iunlinkrm),
199	XFS_ERRORTAG_ATTR_LIST(dirinovalid),
200	XFS_ERRORTAG_ATTR_LIST(bulkstat),
201	XFS_ERRORTAG_ATTR_LIST(logiodone),
202	XFS_ERRORTAG_ATTR_LIST(stratread),
203	XFS_ERRORTAG_ATTR_LIST(stratcmpl),
204	XFS_ERRORTAG_ATTR_LIST(diowrite),
205	XFS_ERRORTAG_ATTR_LIST(bmapifmt),
206	XFS_ERRORTAG_ATTR_LIST(free_extent),
207	XFS_ERRORTAG_ATTR_LIST(rmap_finish_one),
208	XFS_ERRORTAG_ATTR_LIST(refcount_continue_update),
209	XFS_ERRORTAG_ATTR_LIST(refcount_finish_one),
210	XFS_ERRORTAG_ATTR_LIST(bmap_finish_one),
211	XFS_ERRORTAG_ATTR_LIST(ag_resv_critical),
 
212	XFS_ERRORTAG_ATTR_LIST(log_bad_crc),
213	XFS_ERRORTAG_ATTR_LIST(log_item_pin),
214	XFS_ERRORTAG_ATTR_LIST(buf_lru_ref),
215	XFS_ERRORTAG_ATTR_LIST(force_repair),
216	XFS_ERRORTAG_ATTR_LIST(bad_summary),
217	XFS_ERRORTAG_ATTR_LIST(iunlink_fallback),
218	XFS_ERRORTAG_ATTR_LIST(buf_ioerror),
219	XFS_ERRORTAG_ATTR_LIST(reduce_max_iextents),
220	XFS_ERRORTAG_ATTR_LIST(bmap_alloc_minlen_extent),
221	XFS_ERRORTAG_ATTR_LIST(ag_resv_fail),
222	XFS_ERRORTAG_ATTR_LIST(larp),
223	XFS_ERRORTAG_ATTR_LIST(da_leaf_split),
224	XFS_ERRORTAG_ATTR_LIST(attr_leaf_to_node),
225	XFS_ERRORTAG_ATTR_LIST(wb_delay_ms),
226	XFS_ERRORTAG_ATTR_LIST(write_delay_ms),
227	NULL,
228};
229ATTRIBUTE_GROUPS(xfs_errortag);
230
231static const struct kobj_type xfs_errortag_ktype = {
232	.release = xfs_sysfs_release,
233	.sysfs_ops = &xfs_errortag_sysfs_ops,
234	.default_groups = xfs_errortag_groups,
235};
236
237int
238xfs_errortag_init(
239	struct xfs_mount	*mp)
240{
241	int ret;
242
243	mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX,
244			KM_MAYFAIL);
245	if (!mp->m_errortag)
246		return -ENOMEM;
247
248	ret = xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
249				&mp->m_kobj, "errortag");
250	if (ret)
251		kmem_free(mp->m_errortag);
252	return ret;
253}
254
255void
256xfs_errortag_del(
257	struct xfs_mount	*mp)
258{
259	xfs_sysfs_del(&mp->m_errortag_kobj);
260	kmem_free(mp->m_errortag);
261}
262
263static bool
264xfs_errortag_valid(
265	unsigned int		error_tag)
266{
267	if (error_tag >= XFS_ERRTAG_MAX)
268		return false;
269
270	/* Error out removed injection types */
271	if (error_tag == XFS_ERRTAG_DROP_WRITES)
272		return false;
273	return true;
274}
275
276bool
277xfs_errortag_enabled(
278	struct xfs_mount	*mp,
279	unsigned int		tag)
280{
281	if (!mp->m_errortag)
282		return false;
283	if (!xfs_errortag_valid(tag))
284		return false;
285
286	return mp->m_errortag[tag] != 0;
287}
288
289bool
290xfs_errortag_test(
291	struct xfs_mount	*mp,
292	const char		*expression,
293	const char		*file,
294	int			line,
295	unsigned int		error_tag)
296{
297	unsigned int		randfactor;
298
299	/*
300	 * To be able to use error injection anywhere, we need to ensure error
301	 * injection mechanism is already initialized.
302	 *
303	 * Code paths like I/O completion can be called before the
304	 * initialization is complete, but be able to inject errors in such
305	 * places is still useful.
306	 */
307	if (!mp->m_errortag)
308		return false;
309
310	if (!xfs_errortag_valid(error_tag))
311		return false;
312
313	randfactor = mp->m_errortag[error_tag];
314	if (!randfactor || get_random_u32_below(randfactor))
315		return false;
316
317	xfs_warn_ratelimited(mp,
318"Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
319			expression, file, line, mp->m_super->s_id);
320	return true;
321}
322
323int
324xfs_errortag_get(
325	struct xfs_mount	*mp,
326	unsigned int		error_tag)
327{
328	if (!xfs_errortag_valid(error_tag))
329		return -EINVAL;
330
331	return mp->m_errortag[error_tag];
332}
333
334int
335xfs_errortag_set(
336	struct xfs_mount	*mp,
337	unsigned int		error_tag,
338	unsigned int		tag_value)
339{
340	if (!xfs_errortag_valid(error_tag))
341		return -EINVAL;
342
343	mp->m_errortag[error_tag] = tag_value;
344	return 0;
345}
346
347int
348xfs_errortag_add(
349	struct xfs_mount	*mp,
350	unsigned int		error_tag)
351{
352	BUILD_BUG_ON(ARRAY_SIZE(xfs_errortag_random_default) != XFS_ERRTAG_MAX);
353
354	if (!xfs_errortag_valid(error_tag))
355		return -EINVAL;
356
357	return xfs_errortag_set(mp, error_tag,
358			xfs_errortag_random_default[error_tag]);
359}
360
361int
362xfs_errortag_clearall(
363	struct xfs_mount	*mp)
364{
365	memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX);
366	return 0;
367}
368#endif /* DEBUG */
369
370void
371xfs_error_report(
372	const char		*tag,
373	int			level,
374	struct xfs_mount	*mp,
375	const char		*filename,
376	int			linenum,
377	xfs_failaddr_t		failaddr)
378{
379	if (level <= xfs_error_level) {
380		xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
381		"Internal error %s at line %d of file %s.  Caller %pS",
382			    tag, linenum, filename, failaddr);
383
384		xfs_stack_trace();
385	}
386}
387
388void
389xfs_corruption_error(
390	const char		*tag,
391	int			level,
392	struct xfs_mount	*mp,
393	const void		*buf,
394	size_t			bufsize,
395	const char		*filename,
396	int			linenum,
397	xfs_failaddr_t		failaddr)
398{
399	if (buf && level <= xfs_error_level)
400		xfs_hex_dump(buf, bufsize);
401	xfs_error_report(tag, level, mp, filename, linenum, failaddr);
402	xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
403}
404
405/*
406 * Complain about the kinds of metadata corruption that we can't detect from a
407 * verifier, such as incorrect inter-block relationship data.  Does not set
408 * bp->b_error.
409 *
410 * Call xfs_buf_mark_corrupt, not this function.
411 */
412void
413xfs_buf_corruption_error(
414	struct xfs_buf		*bp,
415	xfs_failaddr_t		fa)
416{
417	struct xfs_mount	*mp = bp->b_mount;
418
419	xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
420		  "Metadata corruption detected at %pS, %s block 0x%llx",
421		  fa, bp->b_ops->name, xfs_buf_daddr(bp));
422
423	xfs_alert(mp, "Unmount and run xfs_repair");
424
425	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
426		xfs_stack_trace();
427}
428
429/*
430 * Warnings specifically for verifier errors.  Differentiate CRC vs. invalid
431 * values, and omit the stack trace unless the error level is tuned high.
432 */
433void
434xfs_buf_verifier_error(
435	struct xfs_buf		*bp,
436	int			error,
437	const char		*name,
438	const void		*buf,
439	size_t			bufsz,
440	xfs_failaddr_t		failaddr)
441{
442	struct xfs_mount	*mp = bp->b_mount;
443	xfs_failaddr_t		fa;
444	int			sz;
445
446	fa = failaddr ? failaddr : __return_address;
447	__xfs_buf_ioerror(bp, error, fa);
448
449	xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
450		  "Metadata %s detected at %pS, %s block 0x%llx %s",
451		  bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
452		  fa, bp->b_ops->name, xfs_buf_daddr(bp), name);
453
454	xfs_alert(mp, "Unmount and run xfs_repair");
455
456	if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
457		sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz);
458		xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
459				sz);
460		xfs_hex_dump(buf, sz);
461	}
462
463	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
464		xfs_stack_trace();
465}
466
467/*
468 * Warnings specifically for verifier errors.  Differentiate CRC vs. invalid
469 * values, and omit the stack trace unless the error level is tuned high.
470 */
471void
472xfs_verifier_error(
473	struct xfs_buf		*bp,
474	int			error,
475	xfs_failaddr_t		failaddr)
476{
477	return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0),
478			XFS_CORRUPTION_DUMP_LEN, failaddr);
479}
480
481/*
482 * Warnings for inode corruption problems.  Don't bother with the stack
483 * trace unless the error level is turned up high.
484 */
485void
486xfs_inode_verifier_error(
487	struct xfs_inode	*ip,
488	int			error,
489	const char		*name,
490	const void		*buf,
491	size_t			bufsz,
492	xfs_failaddr_t		failaddr)
493{
494	struct xfs_mount	*mp = ip->i_mount;
495	xfs_failaddr_t		fa;
496	int			sz;
497
498	fa = failaddr ? failaddr : __return_address;
499
500	xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s",
501		  error == -EFSBADCRC ? "CRC error" : "corruption",
502		  fa, ip->i_ino, name);
503
504	xfs_alert(mp, "Unmount and run xfs_repair");
505
506	if (buf && xfs_error_level >= XFS_ERRLEVEL_LOW) {
507		sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz);
508		xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
509				sz);
510		xfs_hex_dump(buf, sz);
511	}
512
513	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
514		xfs_stack_trace();
515}