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net: dev: use kfree_skb_reason() for sch_handle_egress()

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Replace kfree_skb() used in sch_handle_egress() with kfree_skb_reason().
The drop reason SKB_DROP_REASON_TC_EGRESS is introduced. Considering
the code path of tc egerss, we make it distinct with the drop reason
of SKB_DROP_REASON_QDISC_DROP in the next commit.

Signed-off-by: Menglong Dong <imagedong@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Menglong Dong 2022-03-04 14:00:40 +08:00 committed by David S. Miller
parent 9f9919f73c
commit 98b4d7a4e7
3 changed files with 3 additions and 1 deletions
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1
include/linux/skbuff.h
View File

@ -394,6 +394,7 @@ enum skb_drop_reason {
* entry is full
*/
SKB_DROP_REASON_NEIGH_DEAD, /* neigh entry is dead */
SKB_DROP_REASON_TC_EGRESS, /* dropped in TC egress HOOK */
SKB_DROP_REASON_MAX,
};

1
include/trace/events/skb.h
View File

@ -45,6 +45,7 @@
EM(SKB_DROP_REASON_NEIGH_FAILED, NEIGH_FAILED) \
EM(SKB_DROP_REASON_NEIGH_QUEUEFULL, NEIGH_QUEUEFULL) \
EM(SKB_DROP_REASON_NEIGH_DEAD, NEIGH_DEAD) \
EM(SKB_DROP_REASON_TC_EGRESS, TC_EGRESS) \
EMe(SKB_DROP_REASON_MAX, MAX)
#undef EM

2
net/core/dev.c
View File

@ -3889,7 +3889,7 @@ sch_handle_egress(struct sk_buff *skb, int *ret, struct net_device *dev)
case TC_ACT_SHOT:
mini_qdisc_qstats_cpu_drop(miniq);
*ret = NET_XMIT_DROP;
kfree_skb(skb);
kfree_skb_reason(skb, SKB_DROP_REASON_TC_EGRESS);
return NULL;
case TC_ACT_STOLEN:
case TC_ACT_QUEUED: