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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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15
include/net/pkt_sched.h
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@@ -193,4 +193,19 @@ static inline void skb_txtime_consumed(struct sk_buff *skb)
skb->tstamp = ktime_set(0, 0);
}
struct tc_skb_cb {
struct qdisc_skb_cb qdisc_cb;
u16 mru;
bool post_ct;
};
static inline struct tc_skb_cb *tc_skb_cb(const struct sk_buff *skb)
{
struct tc_skb_cb *cb = (struct tc_skb_cb *)skb->cb;
BUILD_BUG_ON(sizeof(*cb) > sizeof_field(struct sk_buff, cb));
return cb;
}
#endif