Added unionfs patches from bug #121334.

git-svn-id: svn+ssh://svn.gentoo.org/var/svnroot/genkernel/trunk@374 67a159dc-881f-0410-a524-ba9dfbe2cb84

generic/initrd.scripts

@@ -572,7 +572,7 @@ setup_unionfs() {
 		# Directory used for rw changes in union mount filesystem
 		UNION=/union
 		MEMORY=/memory
-		if [ -n "$UID" ]
+		if [ -z "$UID" ]
 		then
 			CHANGES=$MEMORY/unionfs_changes/default
 		else
@@ -596,9 +596,9 @@ setup_unionfs() {
 				bad_msg "mount of $CHANGESDEV failed falling back to ramdisk based unionfs"
 				mount -t tmpfs tmpfs $MEMORY
 			fi
-			if [ ! -f ${MEMORY}/livecd.unionfs ]
+			if [ "${CDROOT}" -eq '1' -a ! -f ${MEMORY}/livecd.unionfs  ]
 			then
-				umount $CHANGESDEV
+				umount $MEMORY
 				bad_msg "failed to find livecd.unionfs file on $CHANGESDEV"
 				bad_msg "create a livecd.unionfs file on this device if you wish to use it for unionfs"
 				bad_msg "falling back to ramdisk based unionfs for safety"

generic/linuxrc

@@ -533,7 +533,7 @@ then
 
 	if [ "${USE_UNIONFS_NORMAL}" -eq '1' ]
 	then
-		union_insert_dir $UNION /${NEW_ROOT}/${FS_LOCATION}
+		union_insert_dir ${UNION} ${NEW_ROOT}/${FS_LOCATION}
 		
 		# Make sure fstab notes livecd is mounted ro.  Makes system skip remount which fails on unionfs dirs.
 		sed -e 's|\(.*\s/\s*tmpfs\s*\)defaults\(.*\)|\1defaults,ro\2|' /${UNION}/etc/fstab > /${UNION}/etc/fstab.new
@@ -619,7 +619,13 @@ then
 	CDBOOT=1
 	[ "${DO_slowusb}" ] && sleep 10
 else
-	mkdir -p ${NEW_ROOT}/tmp/.initrd
+	if [ "${USE_UNIONFS_NORMAL}" -eq '1' ]
+	then
+		union_insert_dir ${UNION} ${NEW_ROOT}
+		mkdir -p ${UNION}/tmp/.initrd
+	else
+		mkdir -p ${NEW_ROOT}/tmp/.initrd
+	fi
 fi
 
 # Execute script on the cdrom just before boot to update things if necessary
@@ -633,6 +639,17 @@ fi
 
 verbose_kmsg
 
+# Move the /memory mount point to what will be the system root so that 
+# init scripts will be able to unmount it properly at next reboot
+#
+# Eventually, all "unions over /" mounts should go in that /.unions/
+if [ "${USE_UNIONFS_NORMAL}" -eq '1' ]
+then
+	mkdir -p /${CHROOT}/.unions/memory 2>/dev/null
+	mount -o move /memory /${CHROOT}/.unions/memory || echo '*: Failed to move unionfs /memory into the system root!'
+fi
+
+
 if [ "$0" = '/linuxrc' ]
 then
 	[ ! -e ${CHROOT}/dev/console ] && mknod ${CHROOT}/dev/console c 5 1