From: Michal Privoznik <mprivozn@redhat.com>
Date: Mon, 19 Nov 2012 11:16:07 +0000 (+0100)
Subject: bandwidth: Attach sfq to leaf node
X-Git-Tag: v1.0.1-rc1~17
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7e5040bd200b9ca401a5beb250f95d61a0edbf74;p=thirdparty%2Flibvirt.git

bandwidth: Attach sfq to leaf node

Stochastic Fairness Queuing (SFQ) is queuing discipline
(qdisc) which doesn't really shape any traffic but 'just'
re-arrange packets in sending buffer so no stream starve.
The goal is to ensure fairness. There is basically only one
configuration parameter (perturb) which is set to advised
value of 10.
---

diff --git a/src/util/virnetdevbandwidth.c b/src/util/virnetdevbandwidth.c
index bddb788884..49fc4259a7 100644
--- a/src/util/virnetdevbandwidth.c
+++ b/src/util/virnetdevbandwidth.c
@@ -101,6 +101,15 @@ virNetDevBandwidthSet(const char *ifname,
         if (virCommandRun(cmd, NULL) < 0)
             goto cleanup;
 
+        virCommandFree(cmd);
+        cmd = virCommandNew(TC);
+        virCommandAddArgList(cmd, "qdisc", "add", "dev", ifname, "parent",
+                             "1:1", "handle", "2:", "sfq", "perturb",
+                             "10", NULL);
+
+        if (virCommandRun(cmd, NULL) < 0)
+            goto cleanup;
+
         virCommandFree(cmd);
         cmd = virCommandNew(TC);
         virCommandAddArgList(cmd,"filter", "add", "dev", ifname, "parent",