xfs: pnfs block layout support for 3.20-rc1

This update contains the implementation of the PNFS server export
methods that enable use of XFS filesystems as a block layout target.
xfs: recall pNFS layouts on conflicting access

Recall all outstanding pNFS layouts and truncates, writes and similar extent
list modifying operations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

5 files changed