linux/fs/xfs/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
  23extern int      xfs_etrap[XFS_ERROR_NTRAP];
  24extern 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
  30struct xfs_mount;
  31
  32extern void xfs_error_report(const char *tag, int level, struct xfs_mount *mp,
  33                        const char *filename, int linenum, inst_t *ra);
  34extern 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
 130extern int xfs_error_test_active;
 131extern 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
 139extern int xfs_errortag_add(int error_tag, struct xfs_mount *mp);
 140extern 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__ */
 162
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