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tcp: add tracepoint trace_tcp_send_reset

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New tracepoint trace_tcp_send_reset is added and called from
tcp_v4_send_reset(), tcp_v6_send_reset() and tcp_send_active_reset().

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Song Liu
2017-10-23 09:20:24 -07:00
committed by David S. Miller
parent 7344e29f28
commit c24b14c46b
5 changed files with 31 additions and 3 deletions
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6
net/ipv4/tcp_ipv4.c
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@@ -85,6 +85,8 @@
#include <crypto/hash.h>
#include <linux/scatterlist.h>
#include <trace/events/tcp.h>
#ifdef CONFIG_TCP_MD5SIG
static int tcp_v4_md5_hash_hdr(char *md5_hash, const struct tcp_md5sig_key *key,
__be32 daddr, __be32 saddr, const struct tcphdr *th);
@@ -701,8 +703,10 @@ static void tcp_v4_send_reset(const struct sock *sk, struct sk_buff *skb)
* routing might fail in this case. No choice here, if we choose to force
* input interface, we will misroute in case of asymmetric route.
*/
if (sk)
if (sk) {
arg.bound_dev_if = sk->sk_bound_dev_if;
trace_tcp_send_reset(sk, skb);
}
BUILD_BUG_ON(offsetof(struct sock, sk_bound_dev_if) !=
offsetof(struct inet_timewait_sock, tw_bound_dev_if));