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xfs_error.h
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1 /*
2  * Copyright (c) 2000-2002,2005 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 #ifndef __XFS_ERROR_H__
19 #define __XFS_ERROR_H__
20 
21 #ifdef DEBUG
22 #define XFS_ERROR_NTRAP 10
23 extern int xfs_etrap[XFS_ERROR_NTRAP];
24 extern int xfs_error_trap(int);
25 #define XFS_ERROR(e) xfs_error_trap(e)
26 #else
27 #define XFS_ERROR(e) (e)
28 #endif
29 
30 struct xfs_mount;
31 
32 extern void xfs_error_report(const char *tag, int level, struct xfs_mount *mp,
33  const char *filename, int linenum, inst_t *ra);
34 extern void xfs_corruption_error(const char *tag, int level,
35  struct xfs_mount *mp, void *p, const char *filename,
36  int linenum, inst_t *ra);
37 
38 #define XFS_ERROR_REPORT(e, lvl, mp) \
39  xfs_error_report(e, lvl, mp, __FILE__, __LINE__, __return_address)
40 #define XFS_CORRUPTION_ERROR(e, lvl, mp, mem) \
41  xfs_corruption_error(e, lvl, mp, mem, \
42  __FILE__, __LINE__, __return_address)
43 
44 #define XFS_ERRLEVEL_OFF 0
45 #define XFS_ERRLEVEL_LOW 1
46 #define XFS_ERRLEVEL_HIGH 5
47 
48 /*
49  * Macros to set EFSCORRUPTED & return/branch.
50  */
51 #define XFS_WANT_CORRUPTED_GOTO(x,l) \
52  { \
53  int fs_is_ok = (x); \
54  ASSERT(fs_is_ok); \
55  if (unlikely(!fs_is_ok)) { \
56  XFS_ERROR_REPORT("XFS_WANT_CORRUPTED_GOTO", \
57  XFS_ERRLEVEL_LOW, NULL); \
58  error = XFS_ERROR(EFSCORRUPTED); \
59  goto l; \
60  } \
61  }
62 
63 #define XFS_WANT_CORRUPTED_RETURN(x) \
64  { \
65  int fs_is_ok = (x); \
66  ASSERT(fs_is_ok); \
67  if (unlikely(!fs_is_ok)) { \
68  XFS_ERROR_REPORT("XFS_WANT_CORRUPTED_RETURN", \
69  XFS_ERRLEVEL_LOW, NULL); \
70  return XFS_ERROR(EFSCORRUPTED); \
71  } \
72  }
73 
74 /*
75  * error injection tags - the labels can be anything you want
76  * but each tag should have its own unique number
77  */
78 
79 #define XFS_ERRTAG_NOERROR 0
80 #define XFS_ERRTAG_IFLUSH_1 1
81 #define XFS_ERRTAG_IFLUSH_2 2
82 #define XFS_ERRTAG_IFLUSH_3 3
83 #define XFS_ERRTAG_IFLUSH_4 4
84 #define XFS_ERRTAG_IFLUSH_5 5
85 #define XFS_ERRTAG_IFLUSH_6 6
86 #define XFS_ERRTAG_DA_READ_BUF 7
87 #define XFS_ERRTAG_BTREE_CHECK_LBLOCK 8
88 #define XFS_ERRTAG_BTREE_CHECK_SBLOCK 9
89 #define XFS_ERRTAG_ALLOC_READ_AGF 10
90 #define XFS_ERRTAG_IALLOC_READ_AGI 11
91 #define XFS_ERRTAG_ITOBP_INOTOBP 12
92 #define XFS_ERRTAG_IUNLINK 13
93 #define XFS_ERRTAG_IUNLINK_REMOVE 14
94 #define XFS_ERRTAG_DIR_INO_VALIDATE 15
95 #define XFS_ERRTAG_BULKSTAT_READ_CHUNK 16
96 #define XFS_ERRTAG_IODONE_IOERR 17
97 #define XFS_ERRTAG_STRATREAD_IOERR 18
98 #define XFS_ERRTAG_STRATCMPL_IOERR 19
99 #define XFS_ERRTAG_DIOWRITE_IOERR 20
100 #define XFS_ERRTAG_BMAPIFORMAT 21
101 #define XFS_ERRTAG_MAX 22
102 
103 /*
104  * Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
105  */
106 #define XFS_RANDOM_DEFAULT 100
107 #define XFS_RANDOM_IFLUSH_1 XFS_RANDOM_DEFAULT
108 #define XFS_RANDOM_IFLUSH_2 XFS_RANDOM_DEFAULT
109 #define XFS_RANDOM_IFLUSH_3 XFS_RANDOM_DEFAULT
110 #define XFS_RANDOM_IFLUSH_4 XFS_RANDOM_DEFAULT
111 #define XFS_RANDOM_IFLUSH_5 XFS_RANDOM_DEFAULT
112 #define XFS_RANDOM_IFLUSH_6 XFS_RANDOM_DEFAULT
113 #define XFS_RANDOM_DA_READ_BUF XFS_RANDOM_DEFAULT
114 #define XFS_RANDOM_BTREE_CHECK_LBLOCK (XFS_RANDOM_DEFAULT/4)
115 #define XFS_RANDOM_BTREE_CHECK_SBLOCK XFS_RANDOM_DEFAULT
116 #define XFS_RANDOM_ALLOC_READ_AGF XFS_RANDOM_DEFAULT
117 #define XFS_RANDOM_IALLOC_READ_AGI XFS_RANDOM_DEFAULT
118 #define XFS_RANDOM_ITOBP_INOTOBP XFS_RANDOM_DEFAULT
119 #define XFS_RANDOM_IUNLINK XFS_RANDOM_DEFAULT
120 #define XFS_RANDOM_IUNLINK_REMOVE XFS_RANDOM_DEFAULT
121 #define XFS_RANDOM_DIR_INO_VALIDATE XFS_RANDOM_DEFAULT
122 #define XFS_RANDOM_BULKSTAT_READ_CHUNK XFS_RANDOM_DEFAULT
123 #define XFS_RANDOM_IODONE_IOERR (XFS_RANDOM_DEFAULT/10)
124 #define XFS_RANDOM_STRATREAD_IOERR (XFS_RANDOM_DEFAULT/10)
125 #define XFS_RANDOM_STRATCMPL_IOERR (XFS_RANDOM_DEFAULT/10)
126 #define XFS_RANDOM_DIOWRITE_IOERR (XFS_RANDOM_DEFAULT/10)
127 #define XFS_RANDOM_BMAPIFORMAT XFS_RANDOM_DEFAULT
128 
129 #ifdef DEBUG
130 extern int xfs_error_test_active;
131 extern int xfs_error_test(int, int *, char *, int, char *, unsigned long);
132 
133 #define XFS_NUM_INJECT_ERROR 10
134 #define XFS_TEST_ERROR(expr, mp, tag, rf) \
135  ((expr) || (xfs_error_test_active && \
136  xfs_error_test((tag), (mp)->m_fixedfsid, "expr", __LINE__, __FILE__, \
137  (rf))))
138 
139 extern int xfs_errortag_add(int error_tag, struct xfs_mount *mp);
140 extern int xfs_errortag_clearall(struct xfs_mount *mp, int loud);
141 #else
142 #define XFS_TEST_ERROR(expr, mp, tag, rf) (expr)
143 #define xfs_errortag_add(tag, mp) (ENOSYS)
144 #define xfs_errortag_clearall(mp, loud) (ENOSYS)
145 #endif /* DEBUG */
146 
147 /*
148  * XFS panic tags -- allow a call to xfs_alert_tag() be turned into
149  * a panic by setting xfs_panic_mask in a sysctl.
150  */
151 #define XFS_NO_PTAG 0
152 #define XFS_PTAG_IFLUSH 0x00000001
153 #define XFS_PTAG_LOGRES 0x00000002
154 #define XFS_PTAG_AILDELETE 0x00000004
155 #define XFS_PTAG_ERROR_REPORT 0x00000008
156 #define XFS_PTAG_SHUTDOWN_CORRUPT 0x00000010
157 #define XFS_PTAG_SHUTDOWN_IOERROR 0x00000020
158 #define XFS_PTAG_SHUTDOWN_LOGERROR 0x00000040
159 #define XFS_PTAG_FSBLOCK_ZERO 0x00000080
160 
161 #endif /* __XFS_ERROR_H__ */
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