swmodd: Added cgroup mount handler package

swmodd/Makefile

@@ -6,7 +6,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=swmodd
-PKG_VERSION:=2.1.5
+PKG_VERSION:=2.1.5.1
 
 LOCAL_DEV:=0
 ifneq ($(LOCAL_DEV),1)
@@ -31,8 +31,9 @@ define Package/swmodd
   SUBMENU:=TRx69
   TITLE:= Software Modules Daemon
   DEPENDS:=+libuci +libubox +ubus +libuuid +opkg +libcurl \
-	    +PACKAGE_liblxc:liblxc +PACKAGE_liblxc:cgroupfs-mount \
-	    +@BUSYBOX_CONFIG_BUSYBOX +@BUSYBOX_CONFIG_FEATURE_SHOW_SCRIPT
+	    +PACKAGE_liblxc:liblxc +@BUSYBOX_CONFIG_BUSYBOX \
+	    +@BUSYBOX_CONFIG_FEATURE_SHOW_SCRIPT +@BUSYBOX_CONFIG_SCRIPT \
+	    +swmodd-cgroup
 endef
 
 define Package/swmodd/description
@@ -43,6 +44,14 @@ define Package/swmodd/config
 	source "$(SOURCE)/Config.in"
 endef
 
+define Package/swmodd-cgroup
+  SECTION:=utils
+  CATEGORY:=Utilities
+  SUBMENU:=TRx69
+  TITLE:= Cgroup mount handler for Software modules daemon
+  DEPENDS:=+@CONFIG_KERNEL_CGROUPS
+endef
+
 TARGET_CFLAGS += \
 	-I$(STAGING_DIR)/usr/include \
 	-D_GNU_SOURCE \
@@ -82,4 +91,10 @@ ifeq ($(CONFIG_PACKAGE_liblxc),y)
 endif
 endef
 
+define Package/swmodd-cgroup/install
+	$(INSTALL_DIR) $(1)/etc/init.d
+	$(INSTALL_BIN) ./files/etc/init.d/swmodd_cgroup $(1)/etc/init.d/swmodd_cgroup
+endef
+
+$(eval $(call BuildPackage,swmodd-cgroup))
 $(eval $(call BuildPackage,swmodd))

swmodd/files/etc/init.d/swmodd_cgroup

@@ -0,0 +1,56 @@
+#!/bin/sh /etc/rc.common
+
+START=01
+
+log() {
+	echo "swmodd_cgroup: ${@}" >/dev/console
+}
+
+cgroup_remounting_required()
+{
+	if ! mount |grep -q '/sys/fs/cgroup '; then
+		return 1;
+	fi
+
+	if grep -v '^#' /etc/fstab | grep -q cgroup; then
+		log "fstab mounted system, remounting of cgroup not required"
+		return 1
+	fi
+
+	if [ ! -d /sys/fs/cgroup ] && [ ! -e /proc/cgroups ]; then
+		log "cgroup fs not found"
+		return 1
+	fi
+
+	umount /sys/fs/cgroup
+	return 0;
+}
+
+mount_cgroup()
+{
+
+	if ! cgroup_remounting_required; then
+		log "cgroup remounting not required"
+		return 1
+	fi
+
+	mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup
+	cd /sys/fs/cgroup
+	for sys in $(awk '!/^#/ { if ($4 == 1) print $1 }' /proc/cgroups); do
+		mkdir -p $sys
+		if ! mountpoint -q $sys; then
+			if ! mount -n -t cgroup -o $sys cgroup $sys; then
+				rm -f $sys || true
+			fi
+		fi
+	done
+
+	if [ -e /sys/fs/cgroup/memory/memory.use_hierarchy ]; then
+		echo 1 > /sys/fs/cgroup/memory/memory.use_hierarchy
+	fi
+}
+
+boot()
+{
+	mount_cgroup
+}