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linux/fs/xfs/xfs_error.h
Dan Carpenter fbc21f33cd xfs: don't allow negative error tags 
Errors go from zero which means no error to XFS_ERRTAG_MAX (22).  My
static checker complains that xfs_errortag_add() puts an upper bound on
this but not a lower bound.  Let's fix it by making it unsigned.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-07-20 10:37:13 +10:00

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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__
struct xfs_mount;
extern void xfs_error_report(const char *tag, int level, struct xfs_mount *mp,
const char *filename, int linenum, void *ra);
extern void xfs_corruption_error(const char *tag, int level,
struct xfs_mount *mp, void *p, const char *filename,
int linenum, void *ra);
extern void xfs_verifier_error(struct xfs_buf *bp);
#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(mp, 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, mp); \
error = -EFSCORRUPTED; \
goto l; \
} \
}
#define XFS_WANT_CORRUPTED_RETURN(mp, 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, mp); \
return -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_active;
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_active && \
xfs_error_test((tag), (mp)->m_fixedfsid, "expr", __LINE__, __FILE__, \
(rf))))
extern int xfs_errortag_add(unsigned int error_tag, struct xfs_mount *mp);
extern int xfs_errortag_clearall(struct xfs_mount *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_alert_tag() be turned into
* a panic by setting xfs_panic_mask in a sysctl.
*/
#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
#endif /* __XFS_ERROR_H__ */
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