tree ea5d0df777acfeef50068c4b031bb9417be9743f
parent a20c93e3160e37ecccc738d8eef085c8507949ed
author Christoph Hellwig <hch@lst.de> 1397653642 +0200
committer Trond Myklebust <trond.myklebust@primarydata.com> 1401313808 -0400

nfs: remove ->read_pageio_init from rpc ops

The read_pageio_init method is just a very convoluted way to grab the
right nfs_pageio_ops vector.  The vector to chose is not a choice of
protocol version, but just a pNFS vs MDS I/O choice that can simply be
done inside nfs_pageio_init_read based on the presence of a layout
driver, and a new force_mds flag to the special case of falling back
to MDS I/O on a pNFS-capable volume.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>