tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_fs.h"
20#include "xfs_types.h"
21#include "xfs_log.h"
22#include "xfs_trans.h"
23#include "xfs_sb.h"
24#include "xfs_ag.h"
25#include "xfs_mount.h"
26#include "xfs_bmap_btree.h"
27#include "xfs_dinode.h"
28#include "xfs_inode.h"
29#include "xfs_utils.h"
30#include "xfs_error.h"
31
32#ifdef DEBUG
33
34int xfs_etrap[XFS_ERROR_NTRAP] = {
35 0,
36};
37
38int
39xfs_error_trap(int e)
40{
41 int i;
42
43 if (!e)
44 return 0;
45 for (i = 0; i < XFS_ERROR_NTRAP; i++) {
46 if (xfs_etrap[i] == 0)
47 break;
48 if (e != xfs_etrap[i])
49 continue;
50 xfs_notice(NULL, "%s: error %d", __func__, e);
51 BUG();
52 break;
53 }
54 return e;
55}
56
57int xfs_etest[XFS_NUM_INJECT_ERROR];
58int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
59char * xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
60int xfs_error_test_active;
61
62int
63xfs_error_test(int error_tag, int *fsidp, char *expression,
64 int line, char *file, unsigned long randfactor)
65{
66 int i;
67 int64_t fsid;
68
69 if (prandom_u32() % randfactor)
70 return 0;
71
72 memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));
73
74 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
75 if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
76 xfs_warn(NULL,
77 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
78 expression, file, line, xfs_etest_fsname[i]);
79 return 1;
80 }
81 }
82
83 return 0;
84}
85
86int
87xfs_errortag_add(int error_tag, xfs_mount_t *mp)
88{
89 int i;
90 int len;
91 int64_t fsid;
92
93 memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
94
95 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
96 if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
97 xfs_warn(mp, "error tag #%d on", error_tag);
98 return 0;
99 }
100 }
101
102 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
103 if (xfs_etest[i] == 0) {
104 xfs_warn(mp, "Turned on XFS error tag #%d",
105 error_tag);
106 xfs_etest[i] = error_tag;
107 xfs_etest_fsid[i] = fsid;
108 len = strlen(mp->m_fsname);
109 xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
110 strcpy(xfs_etest_fsname[i], mp->m_fsname);
111 xfs_error_test_active++;
112 return 0;
113 }
114 }
115
116 xfs_warn(mp, "error tag overflow, too many turned on");
117
118 return 1;
119}
120
121int
122xfs_errortag_clearall(xfs_mount_t *mp, int loud)
123{
124 int64_t fsid;
125 int cleared = 0;
126 int i;
127
128 memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
129
130
131 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
132 if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
133 xfs_etest[i] != 0) {
134 cleared = 1;
135 xfs_warn(mp, "Clearing XFS error tag #%d",
136 xfs_etest[i]);
137 xfs_etest[i] = 0;
138 xfs_etest_fsid[i] = 0LL;
139 kmem_free(xfs_etest_fsname[i]);
140 xfs_etest_fsname[i] = NULL;
141 xfs_error_test_active--;
142 }
143 }
144
145 if (loud || cleared)
146 xfs_warn(mp, "Cleared all XFS error tags for filesystem");
147
148 return 0;
149}
150#endif /* DEBUG */
151
152void
153xfs_error_report(
154 const char *tag,
155 int level,
156 struct xfs_mount *mp,
157 const char *filename,
158 int linenum,
159 inst_t *ra)
160{
161 if (level <= xfs_error_level) {
162 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
163 "Internal error %s at line %d of file %s. Caller 0x%p\n",
164 tag, linenum, filename, ra);
165
166 xfs_stack_trace();
167 }
168}
169
170void
171xfs_corruption_error(
172 const char *tag,
173 int level,
174 struct xfs_mount *mp,
175 void *p,
176 const char *filename,
177 int linenum,
178 inst_t *ra)
179{
180 if (level <= xfs_error_level)
181 xfs_hex_dump(p, 64);
182 xfs_error_report(tag, level, mp, filename, linenum, ra);
183 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
184}