unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
1
Fork 0
Code Pull requests 5 Wiki Activity

xfs: add xfs_verifier_error()

Browse source 
We want to distinguish between corruption, CRC errors,
etc.  In addition, the full stack trace on verifier errors
seems less than helpful; it looks more like an oops than
corruption.

Create a new function to specifically alert the user to
verifier errors, which can differentiate between
EFSCORRUPTED and CRC mismatches.  It doesn't dump stack
unless the xfs error level is turned up high.

Define a new error message (EFSBADCRC) to clearly identify
CRC errors.  (Defined to EBADMSG, bad message)

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Eric Sandeen 2014-02-27 15:21:07 +11:00 committed by Dave Chinner
parent f1dbcd7e38
commit ca23f8fdd6
3 changed files with 27 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
fs/xfs/xfs_error.c
View file

@ -178,3 +178,28 @@ xfs_corruption_error(
xfs_error_report(tag, level, mp, filename, linenum, ra);
xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
}
/*
* Warnings specifically for verifier errors. Differentiate CRC vs. invalid
* values, and omit the stack trace unless the error level is tuned high.
*/
void
xfs_verifier_error(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
xfs_alert(mp, "Metadata %s detected at %pF, block 0x%llx",
bp->b_error == EFSBADCRC ? "CRC error" : "corruption",
__return_address, bp->b_bn);
xfs_alert(mp, "Unmount and run xfs_repair");
if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
xfs_alert(mp, "First 64 bytes of corrupted metadata buffer:");
xfs_hex_dump(xfs_buf_offset(bp, 0), 64);
}
if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
xfs_stack_trace();
}

1
fs/xfs/xfs_error.h
View file

@ -34,6 +34,7 @@ extern void xfs_error_report(const char *tag, int level, struct xfs_mount *mp,
extern void xfs_corruption_error(const char *tag, int level,
struct xfs_mount *mp, void *p, const char *filename,
int linenum, inst_t *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)

1
fs/xfs/xfs_linux.h
View file

@ -179,6 +179,7 @@ typedef __uint64_t __psunsigned_t;
#define ENOATTR ENODATA /* Attribute not found */
#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
#define EFSBADCRC EBADMSG /* Bad CRC detected */
#define SYNCHRONIZE() barrier()
#define __return_address __builtin_return_address(0)