From: Miklos Szeredi <mszeredi@suse.cz>
Date: Mon, 12 Jul 2010 12:41:40 +0000 (+0200)
Subject: fuse: add retrieve request
X-Git-Tag: v2.6.36-rc1~499^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d45ba381a74a743eeaa2b06c7c5c0d2bf73ba1a;p=pandora-kernel.git

fuse: add retrieve request

Userspace filesystem can request data to be retrieved from the inode's
mapping.  This request is synchronous and the retrieved data is queued
as a new request.  If the write to the fuse device returns an error
then the retrieve request was not completed and a reply will not be
sent.

Only present pages are returned in the retrieve reply.  Retrieving
stops when it finds a non-present page and only data prior to that is
returned.

This request doesn't change the dirty state of pages.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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