tree 4c00a7c47fa2dab958f43a395e71067fe6ee6538
parent 7140171ea9be4143736c35acf6f31b6feb195ca0
author Trond Myklebust <trond.myklebust@primarydata.com> 1427307282 -0400
committer Trond Myklebust <trond.myklebust@primarydata.com> 1427474378 -0400

NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS

The LAYOUTCOMMIT operation means different things to different layout types.
For blocks and objects, it is both a data and metadata consistency operation.
For files and flexfiles, it is only a metadata consistency operation.

This patch separates out the 2 cases, allowing the files/flexfiles layout
drivers to optimise away the data consistency calls to layoutcommit.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>