lvm2: add hotplug script to scan and enable PVs on hotplug

Automatically scan and activate physical volumes when added at runtime.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

utils/lvm2/Makefile

@@ -144,6 +144,8 @@ define Package/lvm2/install
 	$(INSTALL_DATA) ./files/lvm2.preinit $(1)/lib/preinit/80_lvm2
 	$(INSTALL_DIR) $(1)/etc/init.d
 	$(INSTALL_BIN) ./files/lvm2.init $(1)/etc/init.d/lvm2
+	$(INSTALL_DIR) $(1)/etc/hotplug.d/block
+	$(INSTALL_DATA) ./files/lvm2.hotplug $(1)/etc/hotplug.d/block/20-lvm2
 	$(FIND) $(PKG_INSTALL_DIR)/usr/sbin/ -type l -exec $(CP) -a {} $(1)/sbin/ \;
 endef
 

utils/lvm2/files/lvm2.hotplug

@@ -0,0 +1,6 @@
+
+[ "$ACTION" = "add" ] || return 0
+[ -e "/dev/$DEVNAME" ] || return 0
+
+/sbin/lvm vgscan --mknodes --devices /dev/$DEVNAME || :
+/sbin/lvm vgchange -aly --devices /dev/$DEVNAME || :