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authorStephen Hemminger <stephen@networkplumber.org>2013-02-11 12:22:22 +0400
committerDavid S. Miller <davem@davemloft.net>2013-02-11 23:16:52 +0400
commit547b4e718115eea74087e28d7fa70aec619200db (patch)
tree0e5b250f09d517e55173194527651c9fa64ba6bd /net/bridge/br_stp_bpdu.c
parentcfa82e020bc0be6ab9a1e3c186fe41f1e5cecf7a (diff)
downloadlinux-547b4e718115eea74087e28d7fa70aec619200db.tar.xz
bridge: set priority of STP packets
Spanning Tree Protocol packets should have always been marked as control packets, this causes them to get queued in the high prirority FIFO. As Radia Perlman mentioned in her LCA talk, STP dies if bridge gets overloaded and can't communicate. This is a long-standing bug back to the first versions of Linux bridge. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_stp_bpdu.c')
-rw-r--r--net/bridge/br_stp_bpdu.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/bridge/br_stp_bpdu.c b/net/bridge/br_stp_bpdu.c
index 7f884e3fb955..8660ea3be705 100644
--- a/net/bridge/br_stp_bpdu.c
+++ b/net/bridge/br_stp_bpdu.c
@@ -16,6 +16,7 @@
#include <linux/etherdevice.h>
#include <linux/llc.h>
#include <linux/slab.h>
+#include <linux/pkt_sched.h>
#include <net/net_namespace.h>
#include <net/llc.h>
#include <net/llc_pdu.h>
@@ -40,6 +41,7 @@ static void br_send_bpdu(struct net_bridge_port *p,
skb->dev = p->dev;
skb->protocol = htons(ETH_P_802_2);
+ skb->priority = TC_PRIO_CONTROL;
skb_reserve(skb, LLC_RESERVE);
memcpy(__skb_put(skb, length), data, length);