From 5ccec170d93ce667be3674b4851e3efdeb0d9dc2 Mon Sep 17 00:00:00 2001
From: Mats Karrman <mats@southpole.se>
Date: Wed, 20 Apr 2016 16:55:00 +0200
Subject: [PATCH] Add new package libcgroup

---
 libcgroup/Makefile             | 105 ++++++++++++++++++++++++++++
 libcgroup/files/cgroups.config |  40 +++++++++++
 libcgroup/files/cgroups.init   | 123 +++++++++++++++++++++++++++++++++
 3 files changed, 268 insertions(+)
 create mode 100644 libcgroup/Makefile
 create mode 100644 libcgroup/files/cgroups.config
 create mode 100755 libcgroup/files/cgroups.init

diff --git a/libcgroup/Makefile b/libcgroup/Makefile
new file mode 100644
index 000000000..0dfff375e
--- /dev/null
+++ b/libcgroup/Makefile
@@ -0,0 +1,105 @@
+#
+# Copyright (C) 2016 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=libcgroup
+PKG_VERSION:=0.41
+PKG_RELEASE:=1
+
+PKG_LICENSE:=LGPL-2.1
+PKG_LICENSE_FILES:=COPYING
+
+PKG_SOURCE_VERSION:=2186c97f60df7efe86ddadd5e3d9d36dd4923b98
+
+PKG_SOURCE_URL:=git://git.code.sf.net/p/libcg/libcg
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)+git$(PKG_SOURCE_VERSION).tar.gz
+PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
+
+#PKG_BUILD_PARALLEL:=1
+PKG_FIXUP:=autoreconf
+
+# run install target when cross compiling. basically, make install DESTDIR=$(PKG_INSTALL_DIR)
+# this way we don't need to pick out the resulting files from the build dir.
+PKG_INSTALL:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/libcgroup
+  SECTION:=libs
+  CATEGORY:=Libraries
+  DEPENDS:=+libpthread
+  TITLE:=Control group configuration library
+  URL:=https://sourceforge.net/p/libcg/
+endef
+
+define Package/libcgroup/description
+  Control groups, a new kernel feature in Linux 2.6.24 provides a file system
+  interface to manipulate and control the details on task grouping including
+  creation of new task groups (control groups), permission handling and task
+  assignment.
+endef
+
+define Package/libcgroup-daemon
+  SECTION:=base
+  CATEGORY:=Base system
+  DEPENDS:=+libcgroup
+  TITLE:=Control group management daemon
+  URL:=https://sourceforge.net/p/libcg/
+endef
+
+define Package/libcgroup-utils
+  SECTION:=utils
+  CATEGORY:=Utilities
+  DEPENDS:=+libcgroup
+  TITLE:=Control group configuration utilities
+  URL:=https://sourceforge.net/p/libcg/
+endef
+
+#define Package/libcgroup/conffiles
+#	/etc/config/cgroups
+#endef
+
+CONFIGURE_ARGS += \
+		--disable-bindings \
+		--disable-pam \
+		--enable-static \
+
+define Build/InstallDev
+	$(INSTALL_DIR) $(1)/usr/include/libcgroup
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/include/*.h $(1)/usr/include/
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/include/libcgroup/*.h $(1)/usr/include/libcgroup/
+
+	$(INSTALL_DIR) $(1)/usr/lib $(1)/usr/lib/pkgconfig
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/libcgroup.* $(1)/usr/lib/
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/pkgconfig/libcgroup.pc $(1)/usr/lib/pkgconfig/
+endef
+
+define Package/libcgroup/install
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/libcgroup.so* $(1)/usr/lib/
+endef
+
+define Package/libcgroup-daemon/install
+	$(INSTALL_DIR) $(1)/usr/sbin
+	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/* $(1)/usr/sbin
+
+	# move to its own package?
+	$(INSTALL_DIR) $(1)/etc/config $(1)/etc/init.d
+	$(INSTALL_CONF) ./files/cgroups.config $(1)/etc/config/cgroups
+	$(INSTALL_BIN) ./files/cgroups.init $(1)/etc/init.d/cgroups
+endef
+
+define Package/libcgroup-utils/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/* $(1)/usr/bin
+endef
+
+$(eval $(call BuildPackage,libcgroup))
+$(eval $(call BuildPackage,libcgroup-daemon))
+$(eval $(call BuildPackage,libcgroup-utils))
diff --git a/libcgroup/files/cgroups.config b/libcgroup/files/cgroups.config
new file mode 100644
index 000000000..896f32a26
--- /dev/null
+++ b/libcgroup/files/cgroups.config
@@ -0,0 +1,40 @@
+config cgroups cgroups
+	option enabled 1
+	option defgroup iopsys/normal
+
+config cgroup _root_
+	list option memory.move_charge_at_immigrate=1
+
+config cgroup iopsys
+	list option cpu.shares=4096
+	list option memory.limit_in_bytes=-1
+	list option memory.move_charge_at_immigrate=1
+
+config cgroup iopsys_normal
+	list option cpu.shares=1024
+	list option memory.limit_in_bytes=-1
+	list option memory.move_charge_at_immigrate=1
+
+config cgroup iopsys_high
+	list option cpu.shares=4096
+	list option memory.limit_in_bytes=-1
+	list option memory.move_charge_at_immigrate=1
+
+config cgroup 3prt
+	list option cpu.shares=1024
+	list option memory.limit_in_bytes=75M
+	list option memory.move_charge_at_immigrate=1
+
+config cgroup 3prt_normal
+	list option cpu.shares=1024
+	list option memory.limit_in_bytes=75M
+	list option memory.move_charge_at_immigrate=1
+
+config cgroup 3prt_high
+	list option cpu.shares=4096
+	list option memory.limit_in_bytes=75M
+	list option memory.move_charge_at_immigrate=1
+
+config procmap procmap
+	list procmap minidlna=3prt/normal
+
diff --git a/libcgroup/files/cgroups.init b/libcgroup/files/cgroups.init
new file mode 100755
index 000000000..283b00977
--- /dev/null
+++ b/libcgroup/files/cgroups.init
@@ -0,0 +1,123 @@
+#!/bin/sh /etc/rc.common
+
+START=01
+USE_PROCD=1
+#PROCD_DEBUG=1
+NAME=cgrulesengd
+
+CGBASEDIR=/sys/fs/cgroup
+CGCONFIG="cgroups"
+
+CGRULESCONF=/tmp/cgrules.conf
+CGCONFIGCONF=/tmp/cgconfig.conf
+
+
+cgroupinit_add_knob_val_to_list () {
+CG_KNOB_VAL_LIST="$CG_KNOB_VAL_LIST
+$1"
+}
+
+cgroupinit_create_group () {
+	local cgrp=$1
+	local dir curr
+
+	if [ "$cgrp" == "_root_" ]; then
+		dir=.
+	else
+		dir=$(echo $cgrp |tr '_' '/')
+	fi
+
+	echo -e "group $dir {" >> $CGCONFIGCONF
+
+	CG_KNOB_VAL_LIST=
+	config_list_foreach $cgrp option cgroupinit_add_knob_val_to_list
+	CG_KNOB_VAL_LIST=$(echo "$CG_KNOB_VAL_LIST" |sort)
+	curr="_none_"
+
+	for knob_val in $CG_KNOB_VAL_LIST ; do
+		local ctrlr knob val
+		
+		knob=$(echo $knob_val |awk -F= '{print $1}')
+		ctrlr=$(echo $knob |awk -F. '{print $1}')
+		val=$(echo $knob_val |awk -F= '{print $2}')
+
+		if [ "$curr" != "$ctrlr" ]; then
+			[ "$curr" == "_none_" ] || echo -e "\t}" >> $CGCONFIGCONF
+			curr=$ctrlr
+			echo -e "\t$curr {" >> $CGCONFIGCONF
+		fi
+
+		echo -e "\t\t$knob = \"$val\";" >> $CGCONFIGCONF
+	done
+
+	[ "$curr" == "_none_" ] || echo -e "\t}" >> $CGCONFIGCONF
+	echo -e "}\n" >> $CGCONFIGCONF
+}
+
+cgroupinit_add_to_rules () {
+	local name_grp=$1
+	local name grp
+
+	name=$(echo $name_grp |awk -F= '{print $1}')
+	grp=$(echo $name_grp |awk -F= '{print $2}')
+
+	echo -e "*:$name\t*\t$grp" >> $CGRULESCONF
+}
+
+cgroupinit_generate_config () {
+	local enab defgrp
+
+	config_load $CGCONFIG
+
+	config_get enab cgroups enabled "1"
+	[ $enab -eq 0 ] && return 1
+
+	config_get defgrp cgroups defgroup "_undef_"
+	[ "$defgrp" == "_undef_" ] && return 1
+
+	# mount here instead of in cgconfigparser to get all options right
+	# mounting without any controllers listed means mount all available
+	if ! grep -q " $CGBASEDIR cgroup " /proc/mounts; then
+		mount -t cgroup -o nodev,noexec,nosuid cgroup $CGBASEDIR
+		[ $? -eq 0 ] || return 1
+	fi
+
+	echo -n '' > $CGCONFIGCONF
+	config_foreach cgroupinit_create_group cgroup
+
+	echo -n '' > $CGRULESCONF
+	config_list_foreach procmap procmap cgroupinit_add_to_rules
+	echo -e "*\t*\t$defgrp" >> $CGRULESCONF
+
+	return 0
+}
+
+# cgrulesengd has hardcoded paths for configuration files
+# use symlinks to point to generated config files
+cgroupinit_cgrulesengd_fixup () {
+	[ -r /etc/cgrules.conf ] || ln -s $CGRULESCONF /etc/cgrules.conf
+	[ -r /etc/cgconfig.conf ] || ln -s $CGCONFIGCONF /etc/cgconfig.conf
+	[ -d /etc/cgconfig.d ] || mkdir /etc/cgconfig.d
+}
+
+start_service () {
+	cgroupinit_generate_config
+	[ $? -eq 0 ] || return
+
+	cgroupinit_cgrulesengd_fixup
+	/usr/sbin/cgconfigparser -l $CGCONFIGCONF || return
+
+	procd_open_instance
+	procd_set_param command /usr/sbin/cgrulesengd --nodaemon --syslog
+	procd_set_param respawn
+	procd_close_instance
+}
+
+stop_service () {
+	/usr/sbin/cgclear
+}
+
+service_triggers() {
+        procd_add_reload_trigger $CGCONFIG
+}
+