From d4f8c95dea3b819e6b605adb7988ba090fe0ad0b Mon Sep 17 00:00:00 2001
From: vdutta <vivek.dutta@iopsys.eu>
Date: Mon, 29 Aug 2022 19:45:13 +0530
Subject: [PATCH] swmodd: Added cgroup mount handler swmodd-cgroup pkg

---
 swmodd/Makefile                       | 22 +++++++++--
 swmodd/files/etc/init.d/swmodd_cgroup | 56 +++++++++++++++++++++++++++
 2 files changed, 74 insertions(+), 4 deletions(-)
 create mode 100644 swmodd/files/etc/init.d/swmodd_cgroup

diff --git a/swmodd/Makefile b/swmodd/Makefile
index e0d9bae0a..153fe2780 100755
--- a/swmodd/Makefile
+++ b/swmodd/Makefile
@@ -5,7 +5,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=swmodd
-PKG_VERSION:=2.1.7
+PKG_VERSION:=2.1.8
 
 LOCAL_DEV:=0
 ifneq ($(LOCAL_DEV),1)
@@ -30,15 +30,23 @@ define Package/swmodd
   SUBMENU:=TRx69
   TITLE:= Software Modules Daemon
   DEPENDS:=+libuci +libubox +ubus +libuuid +opkg +libcurl \
-	    +PACKAGE_liblxc:liblxc +cgroupfs-mount \
-	    +@BUSYBOX_CONFIG_BUSYBOX +@BUSYBOX_CONFIG_FEATURE_SHOW_SCRIPT \
-	    +@BUSYBOX_CONFIG_SCRIPT
+	    +PACKAGE_liblxc:liblxc +@BUSYBOX_CONFIG_BUSYBOX \
+	    +@BUSYBOX_CONFIG_FEATURE_SHOW_SCRIPT +@BUSYBOX_CONFIG_SCRIPT \
+	    +swmodd-cgroup
 endef
 
 define Package/swmodd/description
 	Software module daemon to manage software/deployment units using TR181 datamodel.
 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 += \
 	-D_GNU_SOURCE \
 	-Wall -Werror
@@ -85,4 +93,10 @@ ifeq ($(CONFIG_PACKAGE_crun),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))
diff --git a/swmodd/files/etc/init.d/swmodd_cgroup b/swmodd/files/etc/init.d/swmodd_cgroup
new file mode 100644
index 000000000..dc020523c
--- /dev/null
+++ b/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
+}