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| author | Geliang Tang <geliang.tang@linux.dev> | 2023-12-22 13:47:22 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-01-02 13:32:45 +0000 |
| commit | d9cd27b8cd191133e287e5de107f971136abe8a2 (patch) | |
| tree | 5c82e7c92609049718e153e9b7ffac43a553bc6c /net/mptcp/protocol.c | |
| parent | 42a7889a1931a07a04a64c8cd72f41a4ba78a1d9 (diff) | |
| download | linux-d9cd27b8cd191133e287e5de107f971136abe8a2.tar.gz linux-d9cd27b8cd191133e287e5de107f971136abe8a2.tar.bz2 linux-d9cd27b8cd191133e287e5de107f971136abe8a2.zip | |
mptcp: add CurrEstab MIB counter support
Add a new MIB counter named MPTCP_MIB_CURRESTAB to count current
established MPTCP connections, similar to TCP_MIB_CURRESTAB. This is
useful to quickly list the number of MPTCP connections without having to
iterate over all of them.
This patch adds a new helper function mptcp_set_state(): if the state
switches from or to ESTABLISHED state, this newly added counter is
incremented. This helper is going to be used in the following patch.
Similar to MPTCP_INC_STATS(), a new helper called MPTCP_DEC_STATS() is
also needed to decrement a MIB counter.
Signed-off-by: Geliang Tang <geliang.tang@linux.dev>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts <matttbe@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mptcp/protocol.c')
| -rw-r--r-- | net/mptcp/protocol.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 91e5845d80a9..a77a609b4470 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2871,6 +2871,24 @@ void mptcp_subflow_shutdown(struct sock *sk, struct sock *ssk, int how) release_sock(ssk); } +void mptcp_set_state(struct sock *sk, int state) +{ + int oldstate = sk->sk_state; + + switch (state) { + case TCP_ESTABLISHED: + if (oldstate != TCP_ESTABLISHED) + MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_CURRESTAB); + break; + + default: + if (oldstate == TCP_ESTABLISHED) + MPTCP_DEC_STATS(sock_net(sk), MPTCP_MIB_CURRESTAB); + } + + inet_sk_state_store(sk, state); +} + static const unsigned char new_state[16] = { /* current state: new state: action: */ [0 /* (Invalid) */] = TCP_CLOSE, |