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| author | Patrick McHardy <kaber@trash.net> | 2007-07-15 00:02:31 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2007-07-15 00:02:31 -0700 |
| commit | 73ca4918fbb98311421259d82ef4ab44feeace43 (patch) | |
| tree | a5ae62e5474b3d28d7205ab3170aa73ff6d5f8ac /net/sched/sch_atm.c | |
| parent | f6853e2df3de82c1dac8f62ddcf3a8dfa302419e (diff) | |
| download | linux-73ca4918fbb98311421259d82ef4ab44feeace43.tar.gz linux-73ca4918fbb98311421259d82ef4ab44feeace43.tar.bz2 linux-73ca4918fbb98311421259d82ef4ab44feeace43.zip | |
[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 <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_atm.c')
| -rw-r--r-- | net/sched/sch_atm.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/net/sched/sch_atm.c b/net/sched/sch_atm.c index ccee10dae66d..37ae6d1deb14 100644 --- a/net/sched/sch_atm.c +++ b/net/sched/sch_atm.c @@ -396,8 +396,9 @@ static int atm_tc_enqueue(struct sk_buff *skb, struct Qdisc *sch) !(flow = (struct atm_flow_data *)atm_tc_get(sch, skb->priority))) for (flow = p->flows; flow; flow = flow->next) if (flow->filter_list) { - result = tc_classify(skb, flow->filter_list, - &res); + result = tc_classify_compat(skb, + flow->filter_list, + &res); if (result < 0) continue; flow = (struct atm_flow_data *)res.class; @@ -420,6 +421,12 @@ static int atm_tc_enqueue(struct sk_buff *skb, struct Qdisc *sch) case TC_ACT_SHOT: kfree_skb(skb); goto drop; + case TC_POLICE_RECLASSIFY: + if (flow->excess) + flow = flow->excess; + else + ATM_SKB(skb)->atm_options |= ATM_ATMOPT_CLP; + break; } #elif defined(CONFIG_NET_CLS_POLICE) switch (result) { |