busybox-initramfs: init: add support for NFS mounts

Example usage: boot=NFS=192.168.1.1:/tftpboot

Signed-off-by: Alain Kalker <a.c.kalker@gmail.com>

packages/initramfs/sysutils/busybox-initramfs/scripts/init

@@ -139,6 +139,13 @@ NBD_DEVS="0"
     NBD_DEVS=$(( ${NBD_DEVS} + 1 ))
   }
 
+  mount_nfs() {
+  # Mount NFS export
+    NFS_OPTIONS="$3,nolock,retrans=10"
+
+    mount_common "$1" "$2" "$NFS_OPTIONS" "nfs"
+  }
+
   mount_part() {
   # Mount a local or network filesystem
   # $1:[TYPE=]target, $2:mountpoint, $3:mount options, [$4:fs type]
@@ -153,6 +160,9 @@ NBD_DEVS="0"
       NBD=*)
         MOUNT_CMD="mount_nbd"
         ;;
+      NFS=*)
+        MOUNT_CMD="mount_nfs"
+        ;;
       *)
         error "mount_part" "Unknown filesystem $1"
         ;;