aboutsummaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_error.c
blob: 3ee186ac10938855965a5907c93de487e83851bf (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/*
 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include "xfs.h"
#include "xfs_format.h"
#include "xfs_fs.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_error.h"

#ifdef DEBUG

int	xfs_etest[XFS_NUM_INJECT_ERROR];
int64_t	xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
char *	xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
int	xfs_error_test_active;

int
xfs_error_test(int error_tag, int *fsidp, char *expression,
	       int line, char *file, unsigned long randfactor)
{
	int i;
	int64_t fsid;

	if (prandom_u32() % randfactor)
		return 0;

	memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));

	for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
		if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
			xfs_warn(NULL,
	"Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
				expression, file, line, xfs_etest_fsname[i]);
			return 1;
		}
	}

	return 0;
}

int
xfs_errortag_add(int error_tag, xfs_mount_t *mp)
{
	int i;
	int len;
	int64_t fsid;

	memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));

	for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
		if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
			xfs_warn(mp, "error tag #%d on", error_tag);
			return 0;
		}
	}

	for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
		if (xfs_etest[i] == 0) {
			xfs_warn(mp, "Turned on XFS error tag #%d",
				error_tag);
			xfs_etest[i] = error_tag;
			xfs_etest_fsid[i] = fsid;
			len = strlen(mp->m_fsname);
			xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
			strcpy(xfs_etest_fsname[i], mp->m_fsname);
			xfs_error_test_active++;
			return 0;
		}
	}

	xfs_warn(mp, "error tag overflow, too many turned on");

	return 1;
}

int
xfs_errortag_clearall(xfs_mount_t *mp, int loud)
{
	int64_t fsid;
	int cleared = 0;
	int i;

	memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));


	for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
		if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
		     xfs_etest[i] != 0) {
			cleared = 1;
			xfs_warn(mp, "Clearing XFS error tag #%d",
				xfs_etest[i]);
			xfs_etest[i] = 0;
			xfs_etest_fsid[i] = 0LL;
			kmem_free(xfs_etest_fsname[i]);
			xfs_etest_fsname[i] = NULL;
			xfs_error_test_active--;
		}
	}

	if (loud || cleared)
		xfs_warn(mp, "Cleared all XFS error tags for filesystem");

	return 0;
}
#endif /* DEBUG */

void
xfs_error_report(
	const char		*tag,
	int			level,
	struct xfs_mount	*mp,
	const char		*filename,
	int			linenum,
	inst_t			*ra)
{
	if (level <= xfs_error_level) {
		xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
		"Internal error %s at line %d of file %s.  Caller %pF",
			    tag, linenum, filename, ra);

		xfs_stack_trace();
	}
}

void
xfs_corruption_error(
	const char		*tag,
	int			level,
	struct xfs_mount	*mp,
	void			*p,
	const char		*filename,
	int			linenum,
	inst_t			*ra)
{
	if (level <= xfs_error_level)
		xfs_hex_dump(p, 64);
	xfs_error_report(tag, level, mp, filename, linenum, ra);
	xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
}

/*
 * Warnings specifically for verifier errors.  Differentiate CRC vs. invalid
 * values, and omit the stack trace unless the error level is tuned high.
 */
void
xfs_verifier_error(
	struct xfs_buf		*bp)
{
	struct xfs_mount *mp = bp->b_target->bt_mount;

	xfs_alert(mp, "Metadata %s detected at %pF, block 0x%llx",
		  bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
		  __return_address, bp->b_bn);

	xfs_alert(mp, "Unmount and run xfs_repair");

	if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
		xfs_alert(mp, "First 64 bytes of corrupted metadata buffer:");
		xfs_hex_dump(xfs_buf_offset(bp, 0), 64);
	}

	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
		xfs_stack_trace();
}