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Chris Mason 1643298592 Btrfs: Add O_DIRECT read and write (writes == buffered + cache flush) This adds basic O_DIRECT read and write support. In the write case, we just do a normal buffered write followed by a cache flush. O_DIRECT + O_SYNC are required to trigger metadata syncs. In the read case, there is a basic btrfs_get_block call for use by the generic O_DIRECT code. This does honor multi-volume mapping rules but it skips all checksumming. Signed-off-by: Chris Mason <chris.mason@oracle.com>	History 2008-09-25 11:04:01 -04:00
fs/btrfs	Btrfs: Add O_DIRECT read and write (writes == buffered + cache flush)	2008-09-25 11:04:01 -04:00

Chris Mason 1643298592 Btrfs: Add O_DIRECT read and write (writes == buffered + cache flush)

This adds basic O_DIRECT read and write support.  In the write case, we
just do a normal buffered write followed by a cache flush.  O_DIRECT +
O_SYNC are required to trigger metadata syncs.

In the read case, there is a basic btrfs_get_block call for use by
the generic O_DIRECT code.  This does honor multi-volume mapping rules
but it skips all checksumming.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

History

2008-09-25 11:04:01 -04:00

fs/btrfs

Btrfs: Add O_DIRECT read and write (writes == buffered + cache flush)

2008-09-25 11:04:01 -04:00