base-files: add initial support for mounting overlayfs

[openwrt/openwrt.git] / package / base-files / files / lib / functions / boot.sh

diff --git a/package/base-files/files/lib/functions/boot.sh b/package/base-files/files/lib/functions/boot.sh
index a4ec7be5b25918959a0a45244e5d4a1ad4b1da25..6bdd7a14903fd98bf361e54eccfabfc7a9bc0382 100644 (file)
--- a/package/base-files/files/lib/functions/boot.sh
+++ b/package/base-files/files/lib/functions/boot.sh
@@ -125,7 +125,9 @@ pivot() { # <new_root> <old_root>
 fopivot() { # <rw_root> <ro_root> <dupe?>
        root=$1
        {
-               if grep -q mini_fo /proc/filesystems; then
+               if grep -q overlay /proc/filesystems; then
+                       mount -t overlayfs -olowerdir=/,upperdir=$1 "overlayfs:$1" /mnt && root=/mnt
+               elif grep -q mini_fo /proc/filesystems; then
                        mount -t mini_fo -o base=/,sto=$1 "mini_fo:$1" /mnt 2>&- && root=/mnt
                else
                        mount --bind / /mnt