hyperv: Add processing of MTU reduced by the host
[linux/fpc-iii.git] / fs / xfs / xfs_error.c
blobb92fd7bc49e358159eff5ab24db6fd6a78be2ced
1 /*
2 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
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.
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.
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
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_sb.h"
24 #include "xfs_ag.h"
25 #include "xfs_mount.h"
26 #include "xfs_error.h"
28 #ifdef DEBUG
30 int xfs_etest[XFS_NUM_INJECT_ERROR];
31 int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
32 char * xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
33 int xfs_error_test_active;
35 int
36 xfs_error_test(int error_tag, int *fsidp, char *expression,
37 int line, char *file, unsigned long randfactor)
39 int i;
40 int64_t fsid;
42 if (prandom_u32() % randfactor)
43 return 0;
45 memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));
47 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
48 if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
49 xfs_warn(NULL,
50 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
51 expression, file, line, xfs_etest_fsname[i]);
52 return 1;
56 return 0;
59 int
60 xfs_errortag_add(int error_tag, xfs_mount_t *mp)
62 int i;
63 int len;
64 int64_t fsid;
66 memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
68 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
69 if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
70 xfs_warn(mp, "error tag #%d on", error_tag);
71 return 0;
75 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
76 if (xfs_etest[i] == 0) {
77 xfs_warn(mp, "Turned on XFS error tag #%d",
78 error_tag);
79 xfs_etest[i] = error_tag;
80 xfs_etest_fsid[i] = fsid;
81 len = strlen(mp->m_fsname);
82 xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
83 strcpy(xfs_etest_fsname[i], mp->m_fsname);
84 xfs_error_test_active++;
85 return 0;
89 xfs_warn(mp, "error tag overflow, too many turned on");
91 return 1;
94 int
95 xfs_errortag_clearall(xfs_mount_t *mp, int loud)
97 int64_t fsid;
98 int cleared = 0;
99 int i;
101 memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
104 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
105 if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
106 xfs_etest[i] != 0) {
107 cleared = 1;
108 xfs_warn(mp, "Clearing XFS error tag #%d",
109 xfs_etest[i]);
110 xfs_etest[i] = 0;
111 xfs_etest_fsid[i] = 0LL;
112 kmem_free(xfs_etest_fsname[i]);
113 xfs_etest_fsname[i] = NULL;
114 xfs_error_test_active--;
118 if (loud || cleared)
119 xfs_warn(mp, "Cleared all XFS error tags for filesystem");
121 return 0;
123 #endif /* DEBUG */
125 void
126 xfs_error_report(
127 const char *tag,
128 int level,
129 struct xfs_mount *mp,
130 const char *filename,
131 int linenum,
132 inst_t *ra)
134 if (level <= xfs_error_level) {
135 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
136 "Internal error %s at line %d of file %s. Caller %pF",
137 tag, linenum, filename, ra);
139 xfs_stack_trace();
143 void
144 xfs_corruption_error(
145 const char *tag,
146 int level,
147 struct xfs_mount *mp,
148 void *p,
149 const char *filename,
150 int linenum,
151 inst_t *ra)
153 if (level <= xfs_error_level)
154 xfs_hex_dump(p, 64);
155 xfs_error_report(tag, level, mp, filename, linenum, ra);
156 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
160 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid
161 * values, and omit the stack trace unless the error level is tuned high.
163 void
164 xfs_verifier_error(
165 struct xfs_buf *bp)
167 struct xfs_mount *mp = bp->b_target->bt_mount;
169 xfs_alert(mp, "Metadata %s detected at %pF, block 0x%llx",
170 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
171 __return_address, bp->b_bn);
173 xfs_alert(mp, "Unmount and run xfs_repair");
175 if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
176 xfs_alert(mp, "First 64 bytes of corrupted metadata buffer:");
177 xfs_hex_dump(xfs_buf_offset(bp, 0), 64);
180 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
181 xfs_stack_trace();