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net: tracepoint: replace tcp_set_state tracepoint with inet_sock_set_state tracepoint

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As sk_state is a common field for struct sock, so the state
transition tracepoint should not be a TCP specific feature.
Currently it traces all AF_INET state transition, so I rename this
tracepoint to inet_sock_set_state tracepoint with some minor changes and move it
into trace/events/sock.h.
We dont need to create a file named trace/events/inet_sock.h for this one single
tracepoint.

Two helpers are introduced to trace sk_state transition
    - void inet_sk_state_store(struct sock *sk, int newstate);
    - void inet_sk_set_state(struct sock *sk, int state);
As trace header should not be included in other header files,
so they are defined in sock.c.

The protocol such as SCTP maybe compiled as a ko, hence export
inet_sk_set_state().

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yafang Shao
2017-12-20 11:12:51 +08:00
committed by David S. Miller
parent d7b850a7de
commit 563e0bb0dc
7 changed files with 128 additions and 40 deletions
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2
include/net/inet_sock.h
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@@ -290,6 +290,8 @@ static inline void inet_sk_copy_descendant(struct sock *sk_to,
#endif
int inet_sk_rebuild_header(struct sock *sk);
void inet_sk_set_state(struct sock *sk, int state);
void inet_sk_state_store(struct sock *sk, int newstate);
static inline unsigned int __inet_ehashfn(const __be32 laddr,
const __u16 lport,