diff options
| 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 | |
| parent | 42a7889a1931a07a04a64c8cd72f41a4ba78a1d9 (diff) | |
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')
| -rw-r--r-- | net/mptcp/mib.c | 1 | ||||
| -rw-r--r-- | net/mptcp/mib.h | 8 | ||||
| -rw-r--r-- | net/mptcp/protocol.c | 18 | ||||
| -rw-r--r-- | net/mptcp/protocol.h | 1 |
4 files changed, 28 insertions, 0 deletions
diff --git a/net/mptcp/mib.c b/net/mptcp/mib.c index a0990c365a2e..c30405e76833 100644 --- a/net/mptcp/mib.c +++ b/net/mptcp/mib.c @@ -66,6 +66,7 @@ static const struct snmp_mib mptcp_snmp_list[] = { SNMP_MIB_ITEM("RcvWndShared", MPTCP_MIB_RCVWNDSHARED), SNMP_MIB_ITEM("RcvWndConflictUpdate", MPTCP_MIB_RCVWNDCONFLICTUPDATE), SNMP_MIB_ITEM("RcvWndConflict", MPTCP_MIB_RCVWNDCONFLICT), + SNMP_MIB_ITEM("MPCurrEstab", MPTCP_MIB_CURRESTAB), SNMP_MIB_SENTINEL }; diff --git a/net/mptcp/mib.h b/net/mptcp/mib.h index cae71d947252..dd7fd1f246b5 100644 --- a/net/mptcp/mib.h +++ b/net/mptcp/mib.h @@ -65,6 +65,7 @@ enum linux_mptcp_mib_field { * conflict with another subflow while updating msk rcv wnd */ MPTCP_MIB_RCVWNDCONFLICT, /* Conflict with while updating msk rcv wnd */ + MPTCP_MIB_CURRESTAB, /* Current established MPTCP connections */ __MPTCP_MIB_MAX }; @@ -95,4 +96,11 @@ static inline void __MPTCP_INC_STATS(struct net *net, __SNMP_INC_STATS(net->mib.mptcp_statistics, field); } +static inline void MPTCP_DEC_STATS(struct net *net, + enum linux_mptcp_mib_field field) +{ + if (likely(net->mib.mptcp_statistics)) + SNMP_DEC_STATS(net->mib.mptcp_statistics, field); +} + bool mptcp_mib_alloc(struct net *net); 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, diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 1240268f9e9e..3517f2d24a22 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -641,6 +641,7 @@ bool __mptcp_close(struct sock *sk, long timeout); void mptcp_cancel_work(struct sock *sk); void __mptcp_unaccepted_force_close(struct sock *sk); void mptcp_set_owner_r(struct sk_buff *skb, struct sock *sk); +void mptcp_set_state(struct sock *sk, int state); bool mptcp_addresses_equal(const struct mptcp_addr_info *a, const struct mptcp_addr_info *b, bool use_port); |