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xfs: cleanup I/O-related buffer flags

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Remove the unused and misnamed _XBF_RUN_QUEUES flag, rename XBF_LOG_BUFFER
to the more fitting XBF_SYNCIO, and split XBF_ORDERED into XBF_FUA and
XBF_FLUSH to allow more fine grained control over the bio flags.  Also
cleanup processing of the flags in _xfs_buf_ioapply to make more sense,
and renumber the sparse flag number space to group flags by purpose.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Christoph Hellwig
2011-07-08 14:36:32 +02:00
parent c8da0faf6b
commit 1d5ae5dfee
3 changed files with 39 additions and 45 deletions
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9
fs/xfs/xfs_log.c
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@@ -1268,7 +1268,6 @@ xlog_bdstrat(
return 0;
}
bp->b_flags |= _XBF_RUN_QUEUES;
xfs_buf_iorequest(bp);
return 0;
}
@@ -1369,7 +1368,7 @@ xlog_sync(xlog_t *log,
XFS_BUF_ZEROFLAGS(bp);
XFS_BUF_BUSY(bp);
XFS_BUF_ASYNC(bp);
bp->b_flags |= XBF_LOG_BUFFER;
bp->b_flags |= XBF_SYNCIO;
if (log->l_mp->m_flags & XFS_MOUNT_BARRIER) {
/*
@@ -1380,7 +1379,7 @@ xlog_sync(xlog_t *log,
*/
if (log->l_mp->m_logdev_targp != log->l_mp->m_ddev_targp)
xfs_blkdev_issue_flush(log->l_mp->m_ddev_targp);
XFS_BUF_ORDERED(bp);
bp->b_flags |= XBF_FUA | XBF_FLUSH;
}
ASSERT(XFS_BUF_ADDR(bp) <= log->l_logBBsize-1);
@@ -1413,9 +1412,9 @@ xlog_sync(xlog_t *log,
XFS_BUF_ZEROFLAGS(bp);
XFS_BUF_BUSY(bp);
XFS_BUF_ASYNC(bp);
bp->b_flags |= XBF_LOG_BUFFER;
bp->b_flags |= XBF_SYNCIO;
if (log->l_mp->m_flags & XFS_MOUNT_BARRIER)
XFS_BUF_ORDERED(bp);
bp->b_flags |= XBF_FUA | XBF_FLUSH;
dptr = XFS_BUF_PTR(bp);
/*
* Bump the cycle numbers at the start of each block