From 73ca4918fbb98311421259d82ef4ab44feeace43 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Sun, 15 Jul 2007 00:02:31 -0700 Subject: [NET_SCHED]: act_api: qdisc internal reclassify support The behaviour of NET_CLS_POLICE for TC_POLICE_RECLASSIFY was to return it to the qdisc, which could handle it internally or ignore it. With NET_CLS_ACT however, tc_classify starts over at the first classifier and never returns it to the qdisc. This makes it impossible to support qdisc-internal reclassification, which in turn makes it impossible to remove the old NET_CLS_POLICE code without breaking compatibility since we have two qdiscs (CBQ and ATM) that support this. This patch adds a tc_classify_compat function that handles reclassification the old way and changes CBQ and ATM to use it. This again is of course not fully backwards compatible with the previous NET_CLS_ACT behaviour. Unfortunately there is no way to fully maintain compatibility *and* support qdisc internal reclassification with NET_CLS_ACT, but this seems like the better choice over keeping the two incompatible options around forever. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- include/net/pkt_sched.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'include/net/pkt_sched.h') diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h index 5754d53d9ef..9e22526e80e 100644 --- a/include/net/pkt_sched.h +++ b/include/net/pkt_sched.h @@ -89,8 +89,10 @@ static inline void qdisc_run(struct net_device *dev) __qdisc_run(dev); } +extern int tc_classify_compat(struct sk_buff *skb, struct tcf_proto *tp, + struct tcf_result *res); extern int tc_classify(struct sk_buff *skb, struct tcf_proto *tp, - struct tcf_result *res); + struct tcf_result *res); /* Calculate maximal size of packet seen by hard_start_xmit routine of this device. -- cgit v1.2.3