This patch updates qos-scripts to support fair traffic sharing using the SFQ with external classifiers method. It also corrects a bug in the unsupported ESFQ method already used by qos-scripts. (ESFQ: http://fatooh.org/esfq-2.6/ only updated to 2.6.24, it was switched to an SFQ patch after that and not updated since 2008)

A class can be forced to use SFQ, and an external classifier added like
this:

config class "Normal"
         option avgrate     10
         option priority    30
         option packetdelay 100
         option limitrate   94
#       option qdisc      "sfq perturb 2"
config class "Normal_up"
#       option filter   "protocol all flow hash keys src divisor 1024"
config class "Normal_down"
#       option filter   "protocol all flow hash keys dst divisor 1024"

Using these options, the user needs to load cls_flow before qos-scripts
starts.

I've got more information here:
http://oneitguy.com/blogs/netprince/fair-traffic-sharing-esfq-broken-switching-sfqexternal-classifiers

This has been tested on r23914.

Signed-off-by: Ben Pfountz <netprince<>vt_edu>

SVN-Revision: 26622

2 files changed, 15 insertions, 10 deletions

diff --git a/package/qos-scripts/files/usr/lib/qos/generate.sh b/package/qos-scripts/files/usr/lib/qos/generate.sh
index 9bd3b47..a697e9f 100755
--- a/package/qos-scripts/files/usr/lib/qos/generate.sh
+++ b/package/qos-scripts/files/usr/lib/qos/generate.sh
@@ -315,10 +315,10 @@ start_interface() {
 			cls_var maxrate "$class" limitrate $dir 100
 			cls_var prio "$class" priority $dir 1
 			cls_var avgrate "$class" avgrate $dir 0
-			cls_var qdisc_esfq "$class" qdisc_esfq $dir ""
-			[ "$qdisc_esfq" != "" ] && add_insmod sch_esfq
+			cls_var qdisc "$class" qdisc $dir ""
+			cls_var filter "$class" filter $dir ""
 			config_get classnr "$class" classnr
-			append cstr "$classnr:$prio:$avgrate:$pktsize:$pktdelay:$maxrate:$qdisc_esfq" "$N"
+			append cstr "$classnr:$prio:$avgrate:$pktsize:$pktdelay:$maxrate:$qdisc:$filter" "$N"
 		done
 		append ${prefix}q "$(tcrules)" "$N"
 		export dev_${dir}="ifconfig $dev up txqueuelen 5 >&- 2>&-
diff --git a/package/qos-scripts/files/usr/lib/qos/tcrules.awk b/package/qos-scripts/files/usr/lib/qos/tcrules.awk
index ebda506..90b4212 100644
--- a/package/qos-scripts/files/usr/lib/qos/tcrules.awk
+++ b/package/qos-scripts/files/usr/lib/qos/tcrules.awk
@@ -13,7 +13,8 @@ BEGIN {
 	pktsize[n] = $4
 	delay[n] = $5
 	maxrate[n] = ($6 * linespeed / 100)
-	qdisc_esfq[n] = $7
+	qdisc[n] = $7
+	filter[n] = $8
 }
 
 END {
@@ -68,11 +69,7 @@ END {
 	# main qdisc
 	for (i = 1; i <= n; i++) {
 		printf "tc class add dev "device" parent 1:1 classid 1:"class[i]"0 hfsc"
-		if (qdisc_esfq[i] != "") {
-			# user requested esfq
-			print "esfq " qdisc_esfq[i] " limit " ql
-		} else if (rtm1[i] > 0) {
-			# rt class - use sfq
+		if (rtm1[i] > 0) {
 			printf " rt m1 " int(rtm1[i]) "kbit d " int(d[i] * 1000) "us m2 " int(rtm2[i])"kbit"
 		}
 		printf " ls m1 " int(lsm1[i]) "kbit d " int(d[i] * 1000) "us m2 " int(lsm2[i]) "kbit"
@@ -96,7 +93,10 @@ END {
 		max = 3 * min
 		limit = (min + max) * 3
 
-		if (rtm1[i] > 0) {
+		if (qdisc[i] != "") {
+			# user specified qdisc
+			print qdisc[i] " limit " limit
+		} else if (rtm1[i] > 0) {
 			# rt class - use sfq
 			print "sfq perturb 2 limit "  limit
 		} else {
@@ -123,6 +123,11 @@ END {
 	# filter rule
 	for (i = 1; i <= n; i++) {
 		print "tc filter add dev "device" parent 1: prio "class[i]" protocol ip handle "class[i]" fw flowid 1:"class[i] "0" 
+		filterc=1
+		if (filter[i] != "") {
+			print " tc filter add dev "device" parent "class[i]"00: handle "filterc"0 "filter[i]
+			filterc=filterc+1
+		}
 	}
 }