From: Michael Tremer <michael.tremer@ipfire.org>
Date: Mon, 21 Oct 2019 18:45:26 +0000 (+0200)
Subject: QoS: Use Intermediate Functional Block
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0dfb3984d0c56164dc25dd1a9d1e2213da0aa142;p=people%2Fummeegge%2Fipfire-2.x.git

QoS: Use Intermediate Functional Block

This is an alternative implementation to the Intermediate Queuing
Device (IMQ) which is an out-of-tree kernel patch and has been
criticised for being slow, especially with mutliple processors.

IFB is part of the mainline kernel and a lot less code.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Daniel Weismüller <daniel.weismueller@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
---

diff --git a/config/qos/makeqosscripts.pl b/config/qos/makeqosscripts.pl
index 053b32161b..b25aad93a5 100644
--- a/config/qos/makeqosscripts.pl
+++ b/config/qos/makeqosscripts.pl
@@ -406,10 +406,20 @@ print <<END
 	### $qossettings{'IMQ_DEV'}
 	###
 
+	tc qdisc del dev $qossettings{'RED_DEV'} root
+	tc qdisc del dev $qossettings{'RED_DEV'} ingress
+	tc qdisc add dev $qossettings{'RED_DEV'} handle ffff: ingress
+
 	### BRING UP $qossettings{'IMQ_DEV'}
-	modprobe imq numdevs=1 numqueues=\$(grep -c "^processor" /proc/cpuinfo || echo 1)
+	if [ ! -d "/sys/class/net/$qossettings{'IMQ_DEV'}" ]; then
+		ip link add name $qossettings{'IMQ_DEV'} type ifb
+	fi
+
 	ip link set $qossettings{'IMQ_DEV'} up
 
+	tc filter add dev $qossettings{'RED_DEV'} parent ffff: protocol all u32 match u32 0 0 \\
+		action mirred egress redirect dev $qossettings{'IMQ_DEV'}
+
 	### ADD HTB QDISC FOR $qossettings{'IMQ_DEV'}
 	tc qdisc del dev $qossettings{'IMQ_DEV'} root >/dev/null 2>&1
 	tc qdisc add dev $qossettings{'IMQ_DEV'} root handle 2: htb default $qossettings{'DEFCLASS_INC'}
@@ -510,7 +520,6 @@ print <<END
 	iptables -t mangle -A POSTROUTING -i $qossettings{'RED_DEV'} -p ah -j RETURN
 	iptables -t mangle -A POSTROUTING -i $qossettings{'RED_DEV'} -p esp -j RETURN
 	iptables -t mangle -A POSTROUTING -i $qossettings{'RED_DEV'} -p ip -j RETURN
-	iptables -t mangle -A POSTROUTING -m mark ! --mark 0 ! -o $qossettings{'RED_DEV'} -j IMQ --todev 0
 	iptables -t mangle -I FORWARD -i $qossettings{'RED_DEV'} -j QOS-INC
 	iptables -t mangle -A FORWARD -i $qossettings{'RED_DEV'} -j QOS-TOS
 
@@ -527,7 +536,6 @@ print <<END
 	iptables -t mangle -A PREROUTING -i $qossettings{'RED_DEV'} -p ah -j RETURN
 	iptables -t mangle -A PREROUTING -i $qossettings{'RED_DEV'} -p esp -j RETURN
 	iptables -t mangle -A PREROUTING -i $qossettings{'RED_DEV'} -p ip -j RETURN
-	iptables -t mangle -A PREROUTING -i $qossettings{'RED_DEV'} -j IMQ --todev 0
 	iptables -t mangle -I PREROUTING -i $qossettings{'RED_DEV'} -j QOS-INC
 	iptables -t mangle -A PREROUTING -i $qossettings{'RED_DEV'} -j QOS-TOS
 
@@ -688,16 +696,14 @@ print <<END
 	tc qdisc add root dev $qossettings{'IMQ_DEV'} fq_codel >/dev/null 2>&1
 	# STOP IMQ-DEVICE
 	ip link set $qossettings{'IMQ_DEV'} down >/dev/null 2>&1
+
+	# REMOVE & FLUSH CHAINS
 	iptables -t mangle --delete POSTROUTING -i $qossettings{'RED_DEV'} -p ah -j RETURN >/dev/null 2>&1
 	iptables -t mangle --delete POSTROUTING -i $qossettings{'RED_DEV'} -p esp -j RETURN >/dev/null 2>&1
 	iptables -t mangle --delete POSTROUTING -i $qossettings{'RED_DEV'} -p ip -j RETURN >/dev/null 2>&1
 	iptables -t mangle --delete PREROUTING -i $qossettings{'RED_DEV'} -p ah -j RETURN >/dev/null 2>&1
 	iptables -t mangle --delete PREROUTING -i $qossettings{'RED_DEV'} -p esp -j RETURN >/dev/null 2>&1
 	iptables -t mangle --delete PREROUTING -i $qossettings{'RED_DEV'} -p ip -j RETURN >/dev/null 2>&1
-	iptables -t mangle --delete POSTROUTING -m mark ! --mark 0 ! -o $qossettings{'RED_DEV'} -j IMQ --todev 0 >/dev/null 2>&1
-	iptables -t mangle --delete PREROUTING -i $qossettings{'RED_DEV'} -j IMQ --todev 0  >/dev/null 2>&1
-	# rmmod imq # this crash on 2.6.25.xx
-	# REMOVE & FLUSH CHAINS
 	iptables -t mangle --delete POSTROUTING -o $qossettings{'RED_DEV'} -j QOS-OUT >/dev/null 2>&1
 	iptables -t mangle --delete POSTROUTING -o $qossettings{'RED_DEV'} -j QOS-TOS >/dev/null 2>&1
 	iptables -t mangle --flush  QOS-OUT >/dev/null 2>&1