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root/fs/xfs/xfs_error.h

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/*
 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_ERROR_H__
#define __XFS_ERROR_H__

#ifdef DEBUG
#define XFS_ERROR_NTRAP 10
extern int      xfs_etrap[XFS_ERROR_NTRAP];
extern int      xfs_error_trap(int);
#define XFS_ERROR(e)    xfs_error_trap(e)
#else
#define XFS_ERROR(e)    (e)
#endif

struct xfs_mount;

extern void xfs_error_report(char *tag, int level, struct xfs_mount *mp,
                                char *fname, int linenum, inst_t *ra);
extern void xfs_corruption_error(char *tag, int level, struct xfs_mount *mp,
                                void *p, char *fname, int linenum, inst_t *ra);

#define XFS_ERROR_REPORT(e, lvl, mp)    \
        xfs_error_report(e, lvl, mp, __FILE__, __LINE__, __return_address)
#define XFS_CORRUPTION_ERROR(e, lvl, mp, mem)   \
        xfs_corruption_error(e, lvl, mp, mem, \
                             __FILE__, __LINE__, __return_address)

#define XFS_ERRLEVEL_OFF        0
#define XFS_ERRLEVEL_LOW        1
#define XFS_ERRLEVEL_HIGH       5

/*
 * Macros to set EFSCORRUPTED & return/branch.
 */
#define XFS_WANT_CORRUPTED_GOTO(x,l)    \
        { \
                int fs_is_ok = (x); \
                ASSERT(fs_is_ok); \
                if (unlikely(!fs_is_ok)) { \
                        XFS_ERROR_REPORT("XFS_WANT_CORRUPTED_GOTO", \
                                         XFS_ERRLEVEL_LOW, NULL); \
                        error = XFS_ERROR(EFSCORRUPTED); \
                        goto l; \
                } \
        }

#define XFS_WANT_CORRUPTED_RETURN(x)    \
        { \
                int fs_is_ok = (x); \
                ASSERT(fs_is_ok); \
                if (unlikely(!fs_is_ok)) { \
                        XFS_ERROR_REPORT("XFS_WANT_CORRUPTED_RETURN", \
                                         XFS_ERRLEVEL_LOW, NULL); \
                        return XFS_ERROR(EFSCORRUPTED); \
                } \
        }

/*
 * error injection tags - the labels can be anything you want
 * but each tag should have its own unique number
 */

#define XFS_ERRTAG_NOERROR                              0
#define XFS_ERRTAG_IFLUSH_1                             1
#define XFS_ERRTAG_IFLUSH_2                             2
#define XFS_ERRTAG_IFLUSH_3                             3
#define XFS_ERRTAG_IFLUSH_4                             4
#define XFS_ERRTAG_IFLUSH_5                             5
#define XFS_ERRTAG_IFLUSH_6                             6
#define XFS_ERRTAG_DA_READ_BUF                          7
#define XFS_ERRTAG_BTREE_CHECK_LBLOCK                   8
#define XFS_ERRTAG_BTREE_CHECK_SBLOCK                   9
#define XFS_ERRTAG_ALLOC_READ_AGF                       10
#define XFS_ERRTAG_IALLOC_READ_AGI                      11
#define XFS_ERRTAG_ITOBP_INOTOBP                        12
#define XFS_ERRTAG_IUNLINK                              13
#define XFS_ERRTAG_IUNLINK_REMOVE                       14
#define XFS_ERRTAG_DIR_INO_VALIDATE                     15
#define XFS_ERRTAG_BULKSTAT_READ_CHUNK                  16
#define XFS_ERRTAG_IODONE_IOERR                         17
#define XFS_ERRTAG_STRATREAD_IOERR                      18
#define XFS_ERRTAG_STRATCMPL_IOERR                      19
#define XFS_ERRTAG_DIOWRITE_IOERR                       20
#define XFS_ERRTAG_BMAPIFORMAT                          21
#define XFS_ERRTAG_MAX                                  22

/*
 * Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
 */
#define XFS_RANDOM_DEFAULT                              100
#define XFS_RANDOM_IFLUSH_1                             XFS_RANDOM_DEFAULT
#define XFS_RANDOM_IFLUSH_2                             XFS_RANDOM_DEFAULT
#define XFS_RANDOM_IFLUSH_3                             XFS_RANDOM_DEFAULT
#define XFS_RANDOM_IFLUSH_4                             XFS_RANDOM_DEFAULT
#define XFS_RANDOM_IFLUSH_5                             XFS_RANDOM_DEFAULT
#define XFS_RANDOM_IFLUSH_6                             XFS_RANDOM_DEFAULT
#define XFS_RANDOM_DA_READ_BUF                          XFS_RANDOM_DEFAULT
#define XFS_RANDOM_BTREE_CHECK_LBLOCK                   (XFS_RANDOM_DEFAULT/4)
#define XFS_RANDOM_BTREE_CHECK_SBLOCK                   XFS_RANDOM_DEFAULT
#define XFS_RANDOM_ALLOC_READ_AGF                       XFS_RANDOM_DEFAULT
#define XFS_RANDOM_IALLOC_READ_AGI                      XFS_RANDOM_DEFAULT
#define XFS_RANDOM_ITOBP_INOTOBP                        XFS_RANDOM_DEFAULT
#define XFS_RANDOM_IUNLINK                              XFS_RANDOM_DEFAULT
#define XFS_RANDOM_IUNLINK_REMOVE                       XFS_RANDOM_DEFAULT
#define XFS_RANDOM_DIR_INO_VALIDATE                     XFS_RANDOM_DEFAULT
#define XFS_RANDOM_BULKSTAT_READ_CHUNK                  XFS_RANDOM_DEFAULT
#define XFS_RANDOM_IODONE_IOERR                         (XFS_RANDOM_DEFAULT/10)
#define XFS_RANDOM_STRATREAD_IOERR                      (XFS_RANDOM_DEFAULT/10)
#define XFS_RANDOM_STRATCMPL_IOERR                      (XFS_RANDOM_DEFAULT/10)
#define XFS_RANDOM_DIOWRITE_IOERR                       (XFS_RANDOM_DEFAULT/10)
#define XFS_RANDOM_BMAPIFORMAT                          XFS_RANDOM_DEFAULT

#ifdef DEBUG
extern int xfs_error_test(int, int *, char *, int, char *, unsigned long);

#define XFS_NUM_INJECT_ERROR                            10
#define XFS_TEST_ERROR(expr, mp, tag, rf)               \
        ((expr) || \
         xfs_error_test((tag), (mp)->m_fixedfsid, "expr", __LINE__, __FILE__, \
                        (rf)))

extern int xfs_errortag_add(int error_tag, xfs_mount_t *mp);
extern int xfs_errortag_clearall(xfs_mount_t *mp, int loud);
#else
#define XFS_TEST_ERROR(expr, mp, tag, rf)       (expr)
#define xfs_errortag_add(tag, mp)               (ENOSYS)
#define xfs_errortag_clearall(mp, loud)         (ENOSYS)
#endif /* DEBUG */

/*
 * XFS panic tags -- allow a call to xfs_cmn_err() be turned into
 *                      a panic by setting xfs_panic_mask in a
 *                      sysctl.  update xfs_max[XFS_PARAM] if
 *                      more are added.
 */
#define         XFS_NO_PTAG                     0
#define         XFS_PTAG_IFLUSH                 0x00000001
#define         XFS_PTAG_LOGRES                 0x00000002
#define         XFS_PTAG_AILDELETE              0x00000004
#define         XFS_PTAG_ERROR_REPORT           0x00000008
#define         XFS_PTAG_SHUTDOWN_CORRUPT       0x00000010
#define         XFS_PTAG_SHUTDOWN_IOERROR       0x00000020
#define         XFS_PTAG_SHUTDOWN_LOGERROR      0x00000040
#define         XFS_PTAG_FSBLOCK_ZERO           0x00000080

struct xfs_mount;
/* PRINTFLIKE4 */
extern void xfs_cmn_err(int panic_tag, int level, struct xfs_mount *mp,
                        char *fmt, ...);
/* PRINTFLIKE3 */
extern void xfs_fs_cmn_err(int level, struct xfs_mount *mp, char *fmt, ...);

extern void xfs_hex_dump(void *p, int length);

#define xfs_fs_repair_cmn_err(level, mp, fmt, args...) \
        xfs_fs_cmn_err(level, mp, fmt "  Unmount and run xfs_repair.", ## args)

#define xfs_fs_mount_cmn_err(f, fmt, args...) \
        ((f & XFS_MFSI_QUIET)? (void)0 : cmn_err(CE_WARN, "XFS: " fmt, ## args))

#endif  /* __XFS_ERROR_H__ */

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