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 struct xfs_mount;
  22
  23 extern void xfs_error_report(const char *tag, int level, struct xfs_mount *mp,
  24                         const char *filename, int linenum, void *ra);
  25 extern void xfs_corruption_error(const char *tag, int level,
  26                         struct xfs_mount *mp, void *p, const char *filename,
  27                         int linenum, void *ra);
  28 extern void xfs_verifier_error(struct xfs_buf *bp);
  29
  30 #define XFS_ERROR_REPORT(e, lvl, mp)    \
  31         xfs_error_report(e, lvl, mp, __FILE__, __LINE__, __return_address)
  32 #define XFS_CORRUPTION_ERROR(e, lvl, mp, mem)   \
  33         xfs_corruption_error(e, lvl, mp, mem, \
  34                              __FILE__, __LINE__, __return_address)
  35
  36 #define XFS_ERRLEVEL_OFF        0
  37 #define XFS_ERRLEVEL_LOW        1
  38 #define XFS_ERRLEVEL_HIGH       5
  39
  40 /*
  41  * Macros to set EFSCORRUPTED & return/branch.
  42  */
  43 #define XFS_WANT_CORRUPTED_GOTO(mp, x, l)       \
  44         { \
  45                 int fs_is_ok = (x); \
  46                 ASSERT(fs_is_ok); \
  47                 if (unlikely(!fs_is_ok)) { \
  48                         XFS_ERROR_REPORT("XFS_WANT_CORRUPTED_GOTO", \
  49                                          XFS_ERRLEVEL_LOW, mp); \
  50                         error = -EFSCORRUPTED; \
  51                         goto l; \
  52                 } \
  53         }
  54
  55 #define XFS_WANT_CORRUPTED_RETURN(mp, x)        \
  56         { \
  57                 int fs_is_ok = (x); \
  58                 ASSERT(fs_is_ok); \
  59                 if (unlikely(!fs_is_ok)) { \
  60                         XFS_ERROR_REPORT("XFS_WANT_CORRUPTED_RETURN", \
  61                                          XFS_ERRLEVEL_LOW, mp); \
  62                         return -EFSCORRUPTED; \
  63                 } \
  64         }
  65
  66 /*
  67  * error injection tags - the labels can be anything you want
  68  * but each tag should have its own unique number
  69  */
  70
  71 #define XFS_ERRTAG_NOERROR                              0
  72 #define XFS_ERRTAG_IFLUSH_1                             1
  73 #define XFS_ERRTAG_IFLUSH_2                             2
  74 #define XFS_ERRTAG_IFLUSH_3                             3
  75 #define XFS_ERRTAG_IFLUSH_4                             4
  76 #define XFS_ERRTAG_IFLUSH_5                             5
  77 #define XFS_ERRTAG_IFLUSH_6                             6
  78 #define XFS_ERRTAG_DA_READ_BUF                          7
  79 #define XFS_ERRTAG_BTREE_CHECK_LBLOCK                   8
  80 #define XFS_ERRTAG_BTREE_CHECK_SBLOCK                   9
  81 #define XFS_ERRTAG_ALLOC_READ_AGF                       10
  82 #define XFS_ERRTAG_IALLOC_READ_AGI                      11
  83 #define XFS_ERRTAG_ITOBP_INOTOBP                        12
  84 #define XFS_ERRTAG_IUNLINK                              13
  85 #define XFS_ERRTAG_IUNLINK_REMOVE                       14
  86 #define XFS_ERRTAG_DIR_INO_VALIDATE                     15
  87 #define XFS_ERRTAG_BULKSTAT_READ_CHUNK                  16
  88 #define XFS_ERRTAG_IODONE_IOERR                         17
  89 #define XFS_ERRTAG_STRATREAD_IOERR                      18
  90 #define XFS_ERRTAG_STRATCMPL_IOERR                      19
  91 #define XFS_ERRTAG_DIOWRITE_IOERR                       20
  92 #define XFS_ERRTAG_BMAPIFORMAT                          21
  93 #define XFS_ERRTAG_FREE_EXTENT                          22
  94 #define XFS_ERRTAG_RMAP_FINISH_ONE                      23
  95 #define XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE             24
  96 #define XFS_ERRTAG_REFCOUNT_FINISH_ONE                  25
  97 #define XFS_ERRTAG_BMAP_FINISH_ONE                      26
  98 #define XFS_ERRTAG_AG_RESV_CRITICAL                     27
  99 /*
 100  * DEBUG mode instrumentation to test and/or trigger delayed allocation
 101  * block killing in the event of failed writes. When enabled, all
 102  * buffered writes are silenty dropped and handled as if they failed.
 103  * All delalloc blocks in the range of the write (including pre-existing
 104  * delalloc blocks!) are tossed as part of the write failure error
 105  * handling sequence.
 106  */
 107 #define XFS_ERRTAG_DROP_WRITES                          28
 108 #define XFS_ERRTAG_LOG_BAD_CRC                          29
 109 #define XFS_ERRTAG_MAX                                  30
 110
 111 /*
 112  * Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
 113  */
 114 #define XFS_RANDOM_DEFAULT                              100
 115 #define XFS_RANDOM_IFLUSH_1                             XFS_RANDOM_DEFAULT
 116 #define XFS_RANDOM_IFLUSH_2                             XFS_RANDOM_DEFAULT
 117 #define XFS_RANDOM_IFLUSH_3                             XFS_RANDOM_DEFAULT
 118 #define XFS_RANDOM_IFLUSH_4                             XFS_RANDOM_DEFAULT
 119 #define XFS_RANDOM_IFLUSH_5                             XFS_RANDOM_DEFAULT
 120 #define XFS_RANDOM_IFLUSH_6                             XFS_RANDOM_DEFAULT
 121 #define XFS_RANDOM_DA_READ_BUF                          XFS_RANDOM_DEFAULT
 122 #define XFS_RANDOM_BTREE_CHECK_LBLOCK                   (XFS_RANDOM_DEFAULT/4)
 123 #define XFS_RANDOM_BTREE_CHECK_SBLOCK                   XFS_RANDOM_DEFAULT
 124 #define XFS_RANDOM_ALLOC_READ_AGF                       XFS_RANDOM_DEFAULT
 125 #define XFS_RANDOM_IALLOC_READ_AGI                      XFS_RANDOM_DEFAULT
 126 #define XFS_RANDOM_ITOBP_INOTOBP                        XFS_RANDOM_DEFAULT
 127 #define XFS_RANDOM_IUNLINK                              XFS_RANDOM_DEFAULT
 128 #define XFS_RANDOM_IUNLINK_REMOVE                       XFS_RANDOM_DEFAULT
 129 #define XFS_RANDOM_DIR_INO_VALIDATE                     XFS_RANDOM_DEFAULT
 130 #define XFS_RANDOM_BULKSTAT_READ_CHUNK                  XFS_RANDOM_DEFAULT
 131 #define XFS_RANDOM_IODONE_IOERR                         (XFS_RANDOM_DEFAULT/10)
 132 #define XFS_RANDOM_STRATREAD_IOERR                      (XFS_RANDOM_DEFAULT/10)
 133 #define XFS_RANDOM_STRATCMPL_IOERR                      (XFS_RANDOM_DEFAULT/10)
 134 #define XFS_RANDOM_DIOWRITE_IOERR                       (XFS_RANDOM_DEFAULT/10)
 135 #define XFS_RANDOM_BMAPIFORMAT                          XFS_RANDOM_DEFAULT
 136 #define XFS_RANDOM_FREE_EXTENT                          1
 137 #define XFS_RANDOM_RMAP_FINISH_ONE                      1
 138 #define XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE             1
 139 #define XFS_RANDOM_REFCOUNT_FINISH_ONE                  1
 140 #define XFS_RANDOM_BMAP_FINISH_ONE                      1
 141 #define XFS_RANDOM_AG_RESV_CRITICAL                     4
 142 #define XFS_RANDOM_DROP_WRITES                          1
 143 #define XFS_RANDOM_LOG_BAD_CRC                          1
 144
 145 #ifdef DEBUG
 146 extern int xfs_errortag_init(struct xfs_mount *mp);
 147 extern void xfs_errortag_del(struct xfs_mount *mp);
 148 extern bool xfs_errortag_test(struct xfs_mount *mp, const char *expression,
 149                 const char *file, int line, unsigned int error_tag);
 150 #define XFS_TEST_ERROR(expr, mp, tag)           \
 151         ((expr) || xfs_errortag_test((mp), #expr, __FILE__, __LINE__, (tag)))
 152
 153 extern int xfs_errortag_get(struct xfs_mount *mp, unsigned int error_tag);
 154 extern int xfs_errortag_set(struct xfs_mount *mp, unsigned int error_tag,
 155                 unsigned int tag_value);
 156 extern int xfs_errortag_add(struct xfs_mount *mp, unsigned int error_tag);
 157 extern int xfs_errortag_clearall(struct xfs_mount *mp);
 158 #else
 159 #define xfs_errortag_init(mp)                   (0)
 160 #define xfs_errortag_del(mp)
 161 #define XFS_TEST_ERROR(expr, mp, tag)           (expr)
 162 #define xfs_errortag_set(mp, tag, val)          (ENOSYS)
 163 #define xfs_errortag_add(mp, tag)               (ENOSYS)
 164 #define xfs_errortag_clearall(mp)               (ENOSYS)
 165 #endif /* DEBUG */
 166
 167 /*
 168  * XFS panic tags -- allow a call to xfs_alert_tag() be turned into
 169  *                      a panic by setting xfs_panic_mask in a sysctl.
 170  */
 171 #define         XFS_NO_PTAG                     0
 172 #define         XFS_PTAG_IFLUSH                 0x00000001
 173 #define         XFS_PTAG_LOGRES                 0x00000002
 174 #define         XFS_PTAG_AILDELETE              0x00000004
 175 #define         XFS_PTAG_ERROR_REPORT           0x00000008
 176 #define         XFS_PTAG_SHUTDOWN_CORRUPT       0x00000010
 177 #define         XFS_PTAG_SHUTDOWN_IOERROR       0x00000020
 178 #define         XFS_PTAG_SHUTDOWN_LOGERROR      0x00000040
 179 #define         XFS_PTAG_FSBLOCK_ZERO           0x00000080
 180
 181 #endif  /* __XFS_ERROR_H__ */