aufs: add patch needed when also patching in vserver support into the kernel

The vserver patch changes the type of the 'i_flags' field within 'struct inode'
from 'unsigned int' to 'unsigned short'.

filesystem/aufs/aufs-vserver-inode-i_flags.diff

@@ -0,0 +1,53 @@
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: package/.../aufs/aufs-vserver-inode-i_flags.diff
+# Copyright (C) 2014 The OpenSDE Project
+#
+# More information can be found in the files COPYING and README.
+#
+# This patch file is dual-licensed. It is available under the license the
+# patched project is licensed under, as long as it is an OpenSource license
+# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
+# of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+This patch needs to be applied when trying to build aufs on top
+of a kernel with patched in linux vserver[1] support.
+
+The vserver patch changes the type of the 'i_flags' field within
+'struct inode' from 'unsigned int' to 'unsigned short'. 
+
+Initial build time test was done using following version:
+
+linux kernel: 3.10.2
+linux vserver patch: patch-3.10.9-vs2.3.6.6.diff [2]
+aufs3-standalone: 3.10-20130916
+
+[1] http://linux-vserver.org
+[2] http://vserver.13thfloor.at/Experimental/patch-3.10.9-vs2.3.6.6.diff
+
+--- a/fs/aufs/cpup.h
++++ b/fs/aufs/cpup.h
+@@ -31,7 +31,7 @@
+ struct file;
+ struct au_pin;
+ 
+-void au_cpup_attr_flags(struct inode *dst, unsigned int iflags);
++void au_cpup_attr_flags(struct inode *dst, unsigned short iflags);
+ void au_cpup_attr_timesizes(struct inode *inode);
+ void au_cpup_attr_nlink(struct inode *inode, int force);
+ void au_cpup_attr_changeable(struct inode *inode);
+--- a/fs/aufs/cpup.c
++++ b/fs/aufs/cpup.c
+@@ -24,7 +24,7 @@
+ #include <linux/mm.h>
+ #include "aufs.h"
+ 
+-void au_cpup_attr_flags(struct inode *dst, unsigned int iflags)
++void au_cpup_attr_flags(struct inode *dst, unsigned short iflags)
+ {
+ 	const unsigned int mask = S_DEAD | S_SWAPFILE | S_PRIVATE
+ 		| S_NOATIME | S_NOCMTIME | S_AUTOMOUNT;

filesystem/aufs/pkg_linux_post.conf

@@ -35,6 +35,11 @@ if [ ! -z "$pkg_aufs_source_file" ]; then
 		var_append patchfiles ' ' "$x"
 	done
 
+	# patches needed if the kernel was also patched with the vserver patch
+	if pkginstalled vserver; then
+		var_append patchfiles ' ' "$base/package/*/aufs/aufs-vserver-inode-i_flags.diff"
+	fi
+
 	# copying sources into kernel source tree
 	pkg_aufs_copy_source_files() {
 		cp -rv $pkg_aufs_tempdir/aufs3-standalone/{Documentation,fs} .