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net/sched: Extend qdisc control block with tc control block

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BPF layer extends the qdisc control block via struct bpf_skb_data_end
and because of that there is no more room to add variables to the
qdisc layer control block without going over the skb->cb size.

Extend the qdisc control block with a tc control block,
and move all tc related variables to there as a pre-step for
extending the tc control block with additional members.

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Paul Blakey
2021-12-14 19:24:33 +02:00
committed by Jakub Kicinski
parent 8ca4090fec
commit ec624fe740
7 changed files with 34 additions and 17 deletions
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6
net/sched/cls_api.c
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@@ -1617,12 +1617,14 @@ int tcf_classify(struct sk_buff *skb,
/* If we missed on some chain */
if (ret == TC_ACT_UNSPEC && last_executed_chain) {
struct tc_skb_cb *cb = tc_skb_cb(skb);
ext = tc_skb_ext_alloc(skb);
if (WARN_ON_ONCE(!ext))
return TC_ACT_SHOT;
ext->chain = last_executed_chain;
ext->mru = qdisc_skb_cb(skb)->mru;
ext->post_ct = qdisc_skb_cb(skb)->post_ct;
ext->mru = cb->mru;
ext->post_ct = cb->post_ct;
}
return ret;