qosify: add package for simple qos based on ebpf+cake

qosify is simple daemon for setting up and managing CAKE along with a custom
eBPF based classifier that sets DSCP fields of packets.

It is configured via UCI and it supports the following features:
- simple TCP/UDP port based mapping
- IP address based mapping
- priority boosting based on average packet size
- bulk flow detection based on number of packets per second
- dynamically add IP entries with timeout

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/network/config/qosify/Makefile

@@ -0,0 +1,55 @@
+#
+# Copyright (C) 2021 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+PKG_NAME:=qosify
+PKG_SOURCE_URL=$(PROJECT_GIT)/project/qosify.git
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_DATE:=2021-11-01
+PKG_SOURCE_VERSION:=52a57bf0e4eb2c6419be304981c5c94adb32d037
+PKG_MIRROR_HASH:=11a5f2650cf9c4979455ca230eb9ceddb035e6914bda78cf75b8dd7ebaff65d3
+
+PKG_LICENSE:=GPL-2.0
+PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>
+
+PKG_BUILD_DEPENDS:=bpf-headers
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/cmake.mk
+include $(INCLUDE_DIR)/bpf.mk
+
+define Package/qosify
+  SECTION:=kernel
+  CATEGORY:=Kernel modules
+  SUBMENU:=Network Support
+  TITLE:=A simple QoS solution based eBPF + CAKE
+  DEPENDS:=+libbpf +libubox +libubus +kmod-sched-cake +tc-full @!BPF_TOOLCHAIN_NONE
+endef
+
+define Build/Compile
+	$(call CompileBPF,$(PKG_BUILD_DIR)/qosify-bpf.c)
+	$(Build/Compile/Default)
+endef
+
+define Package/qosify/conffiles
+/etc/config/qosify
+/etc/qosify-defaults.conf
+endef
+
+define Package/qosify/install
+	$(INSTALL_DIR) $(1)/lib/bpf $(1)/usr/sbin $(1)/etc/init.d $(1)/etc/config $(1)/etc/hotplug.d/net
+	$(INSTALL_DATA) $(PKG_BUILD_DIR)/qosify-bpf.o $(1)/lib/bpf
+	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/qosify $(1)/usr/sbin/
+	$(INSTALL_BIN) ./files/qosify.init $(1)/etc/init.d/qosify
+	$(INSTALL_DATA) ./files/qosify-defaults.conf $(1)/etc/qosify-defaults.conf
+	$(INSTALL_DATA) ./files/qosify.conf $(1)/etc/config/qosify
+	$(INSTALL_DATA) ./files/qosify.hotplug $(1)/etc/hotplug.d/net/10-qosify
+endef
+
+$(eval $(call BuildPackage,qosify))

package/network/config/qosify/files/qosify-defaults.conf

@@ -0,0 +1,17 @@
+# DNS
+tcp:53		CS5
+tcp:5353	CS5
+udp:53		CS5
+udp:5353	CS5
+
+# NTP
+udp:123		CS6
+
+# SSH
+tcp:22		+CS4
+
+# HTTP/QUIC
+tcp:80		+CS3
+tcp:443		+CS3
+udp:80		+CS3
+udp:443		+CS3

package/network/config/qosify/files/qosify.conf

@@ -0,0 +1,30 @@
+config defaults
+	list defaults /etc/qosify-defaults.conf
+	option dscp_prio CS5
+	option dscp_icmp CS6
+	option dscp_bulk CS0
+	option dscp_default_udp	CS4
+	option bulk_trigger_timeout 5
+	option bulk_trigger_pps	100
+	option prio_max_avg_pkt_len 500
+
+config interface wan
+	option name wan
+	option disabled 1
+	option bandwidth_up 100mbit
+	option bandwidth_down 100mbit
+	# defaults:
+	option ingress 1
+	option egress 1
+	option mode diffserv4
+	option host_isolate 1
+	option autorate_ingress 1
+	option ingress_options ""
+	option egress_options ""
+	option options ""
+
+config device wandev
+	option disabled 1
+	option name wan
+	option bandwidth 100mbit
+

package/network/config/qosify/files/qosify.hotplug

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+#!/bin/sh
+ubus call qosify check_devices

package/network/config/qosify/files/qosify.init

@@ -0,0 +1,105 @@
+#!/bin/sh /etc/rc.common
+# Copyright (c) 2021 OpenWrt.org
+
+START=19
+
+USE_PROCD=1
+PROG=/usr/sbin/qosify
+
+add_option() {
+	local type="$1"
+	local name="$2"
+
+	config_get val "$cfg" "$name"
+
+	[ -n "$val" ] && json_add_$type "$name" "$val"
+}
+
+add_defaults() {
+	cfg="$1"
+
+	json_add_boolean reset 1
+
+	config_get files "$cfg" defaults
+	json_add_array files
+	for i in $files; do
+		json_add_string "" "$i"
+	done
+	json_close_array
+
+	add_option int timeout
+	add_option string dscp_prio
+	add_option string dscp_bulk
+	add_option string dscp_icmp
+	add_option string dscp_default_udp
+	add_option string dscp_default_tcp
+	add_option int bulk_trigger_timeout
+	add_option int bulk_trigger_pps
+	add_option int prio_max_avg_pkt_len
+}
+
+add_interface() {
+	local cfg="$1"
+
+	config_get_bool disabled "$cfg" disabled 0
+	[ "$disabled" -gt 0 ] && return
+
+	config_get name "$cfg" name
+	json_add_object "$name"
+
+	config_get bw "$cfg" bandwidth
+
+	config_get bw_up "$cfg" bandwidth_up
+	bw_up="${bw_up:-$bw}"
+	[ -n "$bw_up" ] && json_add_string bandwidth_up "$bw_up"
+
+	config_get bw_down "$cfg" bandwidth_down
+	bw_down="${bw_down:-$bw}"
+	[ -n "$bw_down" ] && json_add_string bandwidth_down "$bw_down"
+
+	add_option string bandwidth
+	add_option boolean ingress
+	add_option boolean egress
+	add_option string mode
+	add_option boolean host_isolate
+	add_option boolean autorate_ingress
+	add_option string ingress_options
+	add_option string egress_options
+	add_option string options
+
+	json_close_object
+}
+
+reload_service() {
+	json_init
+
+	config_load qosify
+
+	config_foreach add_defaults defaults
+
+	json_add_object interfaces
+	config_foreach add_interface interface
+	json_close_object
+
+	json_add_object devices
+	config_foreach add_interface device
+	json_close_object
+
+	ubus call qosify config "$(json_dump)"
+}
+
+service_triggers() {
+	procd_add_reload_trigger qosify
+}
+
+start_service() {
+	procd_open_instance
+	procd_set_param command "$PROG"
+	procd_set_param respawn
+	procd_close_instance
+}
+
+service_started() {
+	ubus -t 10 wait_for qosify
+	[ $? = 0 ] && reload_service
+}