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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110019#include "xfs_format.h"
Nathan Scotta844f452005-11-02 14:38:42 +110020#include "xfs_fs.h"
Dave Chinner239880e2013-10-23 10:50:10 +110021#include "xfs_log_format.h"
22#include "xfs_trans_resv.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_error.h"
25
26#ifdef DEBUG
27
Linus Torvalds1da177e2005-04-16 15:20:36 -070028int xfs_etest[XFS_NUM_INJECT_ERROR];
29int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
30char * xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
Dave Chinnerc76febe2010-11-30 15:15:31 +110031int xfs_error_test_active;
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
Linus Torvalds1da177e2005-04-16 15:20:36 -070033int
34xfs_error_test(int error_tag, int *fsidp, char *expression,
35 int line, char *file, unsigned long randfactor)
36{
37 int i;
38 int64_t fsid;
39
Akinobu Mitaecb34032013-03-04 21:58:20 +090040 if (prandom_u32() % randfactor)
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 return 0;
42
43 memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));
44
45 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
46 if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
Dave Chinner0b932cc2011-03-07 10:08:35 +110047 xfs_warn(NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
49 expression, file, line, xfs_etest_fsname[i]);
50 return 1;
51 }
52 }
53
54 return 0;
55}
56
57int
Dan Carpenterfbc21f32016-07-20 10:37:13 +100058xfs_errortag_add(unsigned int error_tag, xfs_mount_t *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070059{
60 int i;
61 int len;
62 int64_t fsid;
63
Darrick J. Wong128f24d2016-06-21 11:53:28 +100064 if (error_tag >= XFS_ERRTAG_MAX)
65 return -EINVAL;
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
68
69 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
70 if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
Dave Chinner0b932cc2011-03-07 10:08:35 +110071 xfs_warn(mp, "error tag #%d on", error_tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 return 0;
73 }
74 }
75
76 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
77 if (xfs_etest[i] == 0) {
Dave Chinner0b932cc2011-03-07 10:08:35 +110078 xfs_warn(mp, "Turned on XFS error tag #%d",
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 error_tag);
80 xfs_etest[i] = error_tag;
81 xfs_etest_fsid[i] = fsid;
82 len = strlen(mp->m_fsname);
83 xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
84 strcpy(xfs_etest_fsname[i], mp->m_fsname);
Dave Chinnerc76febe2010-11-30 15:15:31 +110085 xfs_error_test_active++;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 return 0;
87 }
88 }
89
Dave Chinner0b932cc2011-03-07 10:08:35 +110090 xfs_warn(mp, "error tag overflow, too many turned on");
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92 return 1;
93}
94
95int
Christoph Hellwig0ce4cfd2007-08-30 17:20:53 +100096xfs_errortag_clearall(xfs_mount_t *mp, int loud)
Linus Torvalds1da177e2005-04-16 15:20:36 -070097{
Christoph Hellwig0ce4cfd2007-08-30 17:20:53 +100098 int64_t fsid;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 int cleared = 0;
Christoph Hellwig0ce4cfd2007-08-30 17:20:53 +1000100 int i;
101
102 memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
105 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
106 if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
107 xfs_etest[i] != 0) {
108 cleared = 1;
Dave Chinner0b932cc2011-03-07 10:08:35 +1100109 xfs_warn(mp, "Clearing XFS error tag #%d",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 xfs_etest[i]);
111 xfs_etest[i] = 0;
112 xfs_etest_fsid[i] = 0LL;
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000113 kmem_free(xfs_etest_fsname[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 xfs_etest_fsname[i] = NULL;
Dave Chinnerc76febe2010-11-30 15:15:31 +1100115 xfs_error_test_active--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 }
117 }
118
119 if (loud || cleared)
Dave Chinner0b932cc2011-03-07 10:08:35 +1100120 xfs_warn(mp, "Cleared all XFS error tags for filesystem");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122 return 0;
123}
Christoph Hellwig1550d0b2008-08-13 16:17:37 +1000124#endif /* DEBUG */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126void
127xfs_error_report(
Alex Eldera0e856b2010-04-13 15:22:08 +1000128 const char *tag,
129 int level,
130 struct xfs_mount *mp,
131 const char *filename,
132 int linenum,
Christoph Hellwigfc51c2b2015-06-22 09:44:02 +1000133 void *ra)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134{
135 if (level <= xfs_error_level) {
Dave Chinner6a19d932011-03-07 10:02:35 +1100136 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
Scott Wood65dd2972015-03-25 14:56:21 +1100137 "Internal error %s at line %d of file %s. Caller %pS",
Alex Eldera0e856b2010-04-13 15:22:08 +1000138 tag, linenum, filename, ra);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140 xfs_stack_trace();
141 }
142}
143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144void
145xfs_corruption_error(
Alex Eldera0e856b2010-04-13 15:22:08 +1000146 const char *tag,
147 int level,
148 struct xfs_mount *mp,
149 void *p,
150 const char *filename,
151 int linenum,
Christoph Hellwigfc51c2b2015-06-22 09:44:02 +1000152 void *ra)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153{
154 if (level <= xfs_error_level)
Dave Chinnera2050642013-04-03 16:11:11 +1100155 xfs_hex_dump(p, 64);
Alex Eldera0e856b2010-04-13 15:22:08 +1000156 xfs_error_report(tag, level, mp, filename, linenum, ra);
Dave Chinner65333b42011-03-07 10:03:35 +1100157 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158}
Eric Sandeenca23f8f2014-02-27 15:21:07 +1100159
160/*
161 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid
162 * values, and omit the stack trace unless the error level is tuned high.
163 */
164void
165xfs_verifier_error(
166 struct xfs_buf *bp)
167{
168 struct xfs_mount *mp = bp->b_target->bt_mount;
169
Eric Sandeen233135b2016-01-04 16:10:19 +1100170 xfs_alert(mp, "Metadata %s detected at %pF, %s block 0x%llx",
Dave Chinner24513372014-06-25 14:58:08 +1000171 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
Eric Sandeen233135b2016-01-04 16:10:19 +1100172 __return_address, bp->b_ops->name, bp->b_bn);
Eric Sandeenca23f8f2014-02-27 15:21:07 +1100173
174 xfs_alert(mp, "Unmount and run xfs_repair");
175
176 if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
177 xfs_alert(mp, "First 64 bytes of corrupted metadata buffer:");
178 xfs_hex_dump(xfs_buf_offset(bp, 0), 64);
179 }
180
181 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
182 xfs_stack_trace();
183}