nfs41: change PNFS_LAYOUTRET_ON_SETATTR to only return on truncation to smaller size
authorPeng Tao <tao.peng@primarydata.com>
Fri, 12 Sep 2014 03:04:10 +0000 (11:04 +0800)
committerTrond Myklebust <trond.myklebust@primarydata.com>
Fri, 12 Sep 2014 18:03:20 +0000 (14:03 -0400)
commit88ac815cdbef93dec8382b3531ef90474dd102f2
tree91d3800a5e3b50cbf98d662df97d750d07d3e7c4
parentcb8c20fa53ec28602793ee43ddc7e8883be62e69
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>
fs/nfs/nfs4proc.c
fs/nfs/pnfs.h