LXR linux/fs/xfs/xfs

   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
  21struct xfs_mount;
  22
  23extern void xfs_error_report(const char *tag, int level, struct xfs_mount *mp,
  24                        const char *filename, int linenum, void *ra);
  25extern void xfs_corruption_error(const char *tag, int level,
  26                        struct xfs_mount *mp, void *p, const char *filename,
  27                        int linenum, void *ra);
  28extern 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
 146extern int xfs_errortag_init(struct xfs_mount *mp);
 147extern void xfs_errortag_del(struct xfs_mount *mp);
 148extern 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
 153extern int xfs_errortag_get(struct xfs_mount *mp, unsigned int error_tag);
 154extern int xfs_errortag_set(struct xfs_mount *mp, unsigned int error_tag,
 155                unsigned int tag_value);
 156extern int xfs_errortag_add(struct xfs_mount *mp, unsigned int error_tag);
 157extern 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__ */
 182