From patchwork Fri Dec 22 12:47:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthieu Baerts X-Patchwork-Id: 13503311 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AE745199A4; Fri, 22 Dec 2023 12:47:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="saxW8+r7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C096FC433C7; Fri, 22 Dec 2023 12:47:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1703249276; bh=Ze9OuTUPPQuwSORQ5olDV5NtSpN0MXCRryR2org4ckM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=saxW8+r7+h4liTrpPhkXIM06wCH4VwzmQK30WkXJ/x1Rsp+Y+GVPoF6cVFBOyZYwe ia8BPIP1Wn1J1sMGzCtLZVmbep8RM3Ho1P8bsxIWHlv21EO5EAVyRpXPTroDIYn4+L XujUtcKa+g6pk4Zj7paSa9yvOkODDC1JNuf4Qse92Sc8wTbSSMvGUUHYC9adRRoGSt io8XwyoNtBcVAMDUsTeuKW2hNws9jTVFSqvxDNrLvzQ4sekyAC4P4Ce1ycrwW3LZGG qvHcJKJh31uarIU8n6QMMH8ddnx8/Bp+r7t3eWBv8CGAVkvQpCoMEB/CRZSLlYBUzZ jFhwGAnTjf5yA== From: Matthieu Baerts Date: Fri, 22 Dec 2023 13:47:22 +0100 Subject: [PATCH net-next 1/4] mptcp: add CurrEstab MIB counter support Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20231222-upstream-net-next-20231221-mptcp-currestab-v1-1-c1eb73d6b2b2@kernel.org> References: <20231222-upstream-net-next-20231221-mptcp-currestab-v1-0-c1eb73d6b2b2@kernel.org> In-Reply-To: <20231222-upstream-net-next-20231221-mptcp-currestab-v1-0-c1eb73d6b2b2@kernel.org> To: mptcp@lists.linux.dev, Mat Martineau , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan , Geliang Tang Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Matthieu Baerts X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; l=3643; i=matttbe@kernel.org; h=from:subject:message-id; bh=miW/XKSOuytVFgSjsknCqPk/EdhcvF+o8LQ0qEUhzHM=; b=owEBbQKS/ZANAwAIAfa3gk9CaaBzAcsmYgBlhYV2xMgM8JYyWpD2nO4dP3ilGQatzBVoxPF+l txotzEs9fiJAjMEAAEIAB0WIQToy4X3aHcFem4n93r2t4JPQmmgcwUCZYWFdgAKCRD2t4JPQmmg c2jDD/43Z35uViCyLlDUo8YuyNyQuZmvZIKc6asc5G9f7G5EYriZQ48i64CC75s9Z5dofAsLNQJ BEI3pHI+DX1+11r4nj6tEm/p2vkFfvGBVHBrGGVEpvKdcQ7v6n89mshYvLisVqp5trZcMN7wVQL /J1OYTb4pcIwyoBhAJXM1yX5dBP59Vo8ptG7Vj8lTNCEWGW/2R4lAY49I+Pojo7FxzgXGdDeStO 79vU8sD98hmzAmfLY+QtQFa1dpWELxgnaOFBKBUu+JqprRcE7BTLsbDCuHJWK5ot/B4F9npS0+b CW4T0hjS6XHtVG7iGU5DLl8wLuj41zULPc3c0DvLdiThpF6zWXoTWRyxv3/zphHljsdv14SLbTT OvFVcB1tl8rOa5sHzSYxNZ0bqlrOJNgZrmWnOM9sYDBohzVlRPsKs4wqwMiD0RVJzLMpyMlowyb gYzcXt2aBKLKn1Vw8j/F3TjHdnDYIVZsRWtze6eTpncNRTXowkaFboqUaZl5OTAxtL+XvA8qcIb OHgNrsOUHi6IFhHyCk/+JFdaFVDsEoHJb1LuDYEdY6JKLcPJK7L4RnyuePO5KVZXBcYVYy0qfxg h+NNCxyeuKCIpSFiWKc/9JMnK74viMRQSGG+b7A2RmXfj7kfb/9fSVbXaQRmSWSp6AEGQKgHklP pFwxtYhQZtw4U2A== X-Developer-Key: i=matttbe@kernel.org; a=openpgp; fpr=E8CB85F76877057A6E27F77AF6B7824F4269A073 From: Geliang Tang 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 Acked-by: Paolo Abeni Reviewed-by: Matthieu Baerts Signed-off-by: Matthieu Baerts --- net/mptcp/mib.c | 1 + net/mptcp/mib.h | 8 ++++++++ net/mptcp/protocol.c | 18 ++++++++++++++++++ net/mptcp/protocol.h | 1 + 4 files changed, 28 insertions(+) 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 5cd5c3f535a8..b555bd0b425b 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2885,6 +2885,24 @@ 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);