tree 91d3800a5e3b50cbf98d662df97d750d07d3e7c4
parent cb8c20fa53ec28602793ee43ddc7e8883be62e69
author Peng Tao <tao.peng@primarydata.com> 1410491050 +0800
committer Trond Myklebust <trond.myklebust@primarydata.com> 1410545000 -0400

nfs41: change PNFS_LAYOUTRET_ON_SETATTR to only return on truncation to smaller size

Both blocks layout and objects layout want to use it to avoid CB_LAYOUTRECALL
but that should only happen if client is doing truncation to a smaller size.
For other cases, we let server decide if it wants to recall client's layouts.
Change PNFS_LAYOUTRET_ON_SETATTR to follow the logic and not to send
layoutreturn unnecessarily.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Boaz Harrosh <boaz@plexistor.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>