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linux-pinenote/fs/xfs/xfs_error.h
Christoph Hellwig efc557570d [XFS] avoid memory allocations in xfs_fs_vcmn_err 
xfs_fs_vcmn_err can be called under a spinlock, but does a sleeping memory
allocation to create buffer for it's internal sprintf.  Fortunately it's
the only caller of icmn_err, so we can merge the two and have one single
static buffer and spinlock protecting it.  While we're at it make sure
we proper __attribute__ format annotations so that the compiler can detect
mismatched format strings.

Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
2008-12-22 18:02:01 +11:00

180 lines
6.1 KiB
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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;
extern void xfs_fs_vcmn_err(int level, struct xfs_mount *mp,
char *fmt, va_list ap)
__attribute__ ((format (printf, 3, 0)));
extern void xfs_cmn_err(int panic_tag, int level, struct xfs_mount *mp,
char *fmt, ...)
__attribute__ ((format (printf, 4, 5)));
extern void xfs_fs_cmn_err(int level, struct xfs_mount *mp, char *fmt, ...)
__attribute__ ((format (printf, 3, 4)));
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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