From: Anton Blanchard <anton@samba.org>
Date: Mon, 13 Jun 2011 21:31:12 +0000 (+0100)
Subject: afs: afs_fill_page reads too much, or wrong data
X-Git-Tag: v3.0-rc4~28^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5e7f23373bf9a853e9256e81e86724cdd0a33c29;p=pandora-kernel.git

afs: afs_fill_page reads too much, or wrong data

afs_fill_page should read the page that is about to be written but
the current implementation has a number of issues. If we aren't
extending the file we always read PAGE_CACHE_SIZE at offset 0. If we
are extending the file we try to read the entire file.

Change afs_fill_page to read PAGE_CACHE_SIZE at the right offset,
clamped to i_size.

While here, avoid calling afs_fill_page when we are doing a
PAGE_CACHE_SIZE write.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

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