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| author | Willem de Bruijn <willemb@google.com> | 2017-01-07 17:06:35 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-08 20:58:52 -0500 |
| commit | e7246e122aaa99ebbb8ad7da80f35a20577bd8af (patch) | |
| tree | e1da3b73bd34b4e85b7b781276aa3ab65acb15d4 /include/net/sch_generic.h | |
| parent | d6264071ce7d100a2b7c1f295167796ab5178caf (diff) | |
| download | lwn-e7246e122aaa99ebbb8ad7da80f35a20577bd8af.tar.gz lwn-e7246e122aaa99ebbb8ad7da80f35a20577bd8af.zip | |
net-tc: extract skip classify bit from tc_verd
Packets sent by the IFB device skip subsequent tc classification.
A single bit governs this state. Move it out of tc_verd in
anticipation of removing that __u16 completely.
The new bitfield tc_skip_classify temporarily uses one bit of a
hole, until tc_verd is removed completely in a follow-up patch.
Remove the bit hole comment. It could be 2, 3, 4 or 5 bits long.
With that many options, little value in documenting it.
Introduce a helper function to deduplicate the logic in the two
sites that check this bit.
The field tc_skip_classify is set only in IFB on skbs cloned in
act_mirred, so original packet sources do not have to clear the
bit when reusing packets (notably, pktgen and octeon).
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sch_generic.h')
| -rw-r--r-- | include/net/sch_generic.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 498f81b229a4..857356f2d74b 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -418,6 +418,17 @@ static inline bool skb_at_tc_ingress(const struct sk_buff *skb) #endif } +static inline bool skb_skip_tc_classify(struct sk_buff *skb) +{ +#ifdef CONFIG_NET_CLS_ACT + if (skb->tc_skip_classify) { + skb->tc_skip_classify = 0; + return true; + } +#endif + return false; +} + /* Reset all TX qdiscs greater then index of a device. */ static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) { |