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xfs: clean up log buffer writes 

Don't bother using XFS_bwrite as it doesn't provide much code for
our use case.  Instead opencode it and fold xlog_bdstrat_cb into the
new xlog_bdstrat helper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Christoph Hellwig 2010-01-13 22:17:57 +00:00 committed by Alex Elder
parent e57336ff7f
commit 873ff5501d
2 changed files with 33 additions and 36 deletions
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2
fs/xfs/linux-2.6/xfs_buf.h
View File

@ -408,8 +408,6 @@ static inline int XFS_bwrite(xfs_buf_t *bp)
return error;
}
#define XFS_bdstrat(bp) xfs_buf_iorequest(bp)
#define xfs_iowait(bp) xfs_buf_iowait(bp)
#define xfs_baread(target, rablkno, ralen) \

67
fs/xfs/xfs_log.c
View File

@ -50,7 +50,6 @@ kmem_zone_t *xfs_log_ticket_zone;
(off) += (bytes);}
/* Local miscellaneous function prototypes */
STATIC int xlog_bdstrat_cb(struct xfs_buf *);
STATIC int xlog_commit_record(xfs_mount_t *mp, xlog_ticket_t *ticket,
xlog_in_core_t **, xfs_lsn_t *);
STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp,
@ -987,35 +986,6 @@ xlog_iodone(xfs_buf_t *bp)
} /* xlog_iodone */
/*
* The bdstrat callback function for log bufs. This gives us a central
* place to trap bufs in case we get hit by a log I/O error and need to
* shutdown. Actually, in practice, even when we didn't get a log error,
* we transition the iclogs to IOERROR state *after* flushing all existing
* iclogs to disk. This is because we don't want anymore new transactions to be
* started or completed afterwards.
*/
STATIC int
xlog_bdstrat_cb(struct xfs_buf *bp)
{
xlog_in_core_t *iclog;
iclog = XFS_BUF_FSPRIVATE(bp, xlog_in_core_t *);
if ((iclog->ic_state & XLOG_STATE_IOERROR) == 0) {
/* note for irix bstrat will need struct bdevsw passed
* Fix the following macro if the code ever is merged
*/
XFS_bdstrat(bp);
return 0;
}
XFS_BUF_ERROR(bp, EIO);
XFS_BUF_STALE(bp);
xfs_biodone(bp);
return XFS_ERROR(EIO);
}
/*
* Return size of each in-core log record buffer.
*
@ -1158,7 +1128,6 @@ xlog_alloc_log(xfs_mount_t *mp,
if (!bp)
goto out_free_log;
XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
XFS_BUF_SET_BDSTRAT_FUNC(bp, xlog_bdstrat_cb);
XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
ASSERT(XFS_BUF_ISBUSY(bp));
ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
@ -1196,7 +1165,6 @@ xlog_alloc_log(xfs_mount_t *mp,
if (!XFS_BUF_CPSEMA(bp))
ASSERT(0);
XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
XFS_BUF_SET_BDSTRAT_FUNC(bp, xlog_bdstrat_cb);
XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
iclog->ic_bp = bp;
iclog->ic_data = bp->b_addr;
@ -1343,6 +1311,37 @@ xlog_grant_push_ail(xfs_mount_t *mp,
xfs_trans_ail_push(log->l_ailp, threshold_lsn);
} /* xlog_grant_push_ail */
/*
* The bdstrat callback function for log bufs. This gives us a central
* place to trap bufs in case we get hit by a log I/O error and need to
* shutdown. Actually, in practice, even when we didn't get a log error,
* we transition the iclogs to IOERROR state *after* flushing all existing
* iclogs to disk. This is because we don't want anymore new transactions to be
* started or completed afterwards.
*/
STATIC int
xlog_bdstrat(
struct xfs_buf *bp)
{
struct xlog_in_core *iclog;
iclog = XFS_BUF_FSPRIVATE(bp, xlog_in_core_t *);
if (iclog->ic_state & XLOG_STATE_IOERROR) {
XFS_BUF_ERROR(bp, EIO);
XFS_BUF_STALE(bp);
xfs_biodone(bp);
/*
* It would seem logical to return EIO here, but we rely on
* the log state machine to propagate I/O errors instead of
* doing it here.
*/
return 0;
}
bp->b_flags |= _XBF_RUN_QUEUES;
xfs_buf_iorequest(bp);
return 0;
}
/*
* Flush out the in-core log (iclog) to the on-disk log in an asynchronous
@ -1462,7 +1461,7 @@ xlog_sync(xlog_t *log,
*/
XFS_BUF_WRITE(bp);
if ((error = XFS_bwrite(bp))) {
if ((error = xlog_bdstrat(bp))) {
xfs_ioerror_alert("xlog_sync", log->l_mp, bp,
XFS_BUF_ADDR(bp));
return error;
@ -1502,7 +1501,7 @@ xlog_sync(xlog_t *log,
/* account for internal log which doesn't start at block #0 */
XFS_BUF_SET_ADDR(bp, XFS_BUF_ADDR(bp) + log->l_logBBstart);
XFS_BUF_WRITE(bp);
if ((error = XFS_bwrite(bp))) {
if ((error = xlog_bdstrat(bp))) {
xfs_ioerror_alert("xlog_sync (split)", log->l_mp,
bp, XFS_BUF_ADDR(bp));
return error;