From: Suresh Jayaraman <sjayaraman@suse.de>
Date: Thu, 18 Jun 2009 01:02:09 +0000 (-0700)
Subject: NFS: add support for splice writes
X-Git-Tag: v2.6.31-rc1~58^2~2^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bf40d3435caf49369058b1ed6bbc92f8e2bd92f1;p=pandora-kernel.git

NFS: add support for splice writes

Adds support for splice writes. It effectively calls
generic_file_splice_write() to do the writes.

We need not worry about O_APPEND case as the combination of splice()
writes and O_APPEND is disallowed. This patch propagates NFS write
errors back to the caller. The number of bytes written via splice are
being added to NFSIO_NORMALWRITTENBYTES as these are effectively
cached writes.

Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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