fs/xfs/xfs_error.h

   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__ */