[v2,net-next,1/2] tcp/dccp: remove icsk->icsk_timeout

Message ID	20250318154359.778438-2-edumazet@google.com (mailing list archive)
State	New
Delegated to:	Netdev Maintainers
Headers	show Received: from mail-qt1-f201.google.com (mail-qt1-f201.google.com [209.85.160.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 90AE528FD for <netdev@vger.kernel.org>; Tue, 18 Mar 2025 15:44:03 +0000 (UTC) Date: Tue, 18 Mar 2025 15:43:58 +0000 In-Reply-To: <20250318154359.778438-1-edumazet@google.com> Precedence: bulk Mime-Version: 1.0 References: <20250318154359.778438-1-edumazet@google.com> Message-ID: <20250318154359.778438-2-edumazet@google.com> Subject: [PATCH v2 net-next 1/2] tcp/dccp: remove icsk->icsk_timeout From: Eric Dumazet <edumazet@google.com> To: "David S . Miller" <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Neal Cardwell <ncardwell@google.com> Cc: Kuniyuki Iwashima <kuniyu@amazon.com>, Simon Horman <horms@kernel.org>, netdev@vger.kernel.org, eric.dumazet@gmail.com, Eric Dumazet <edumazet@google.com> Content-Type: text/plain; charset="UTF-8"
Series	tcp/dccp: remove 16 bytes from icsk \| expand [v2,net-next,0/2] tcp/dccp: remove 16 bytes from icsk [v2,net-next,1/2] tcp/dccp: remove icsk->icsk_timeout [v2,net-next,2/2] tcp/dccp: remove icsk->icsk_ack.timeout

diff --git a/Documentation/networking/net_cachelines/inet_connection_sock.rst b/Documentation/networking/net_cachelines/inet_connection_sock.rst index b2401aa7c45090b07c2262ac31a3584725f92233..5fb0dd70c9af76ca68b3406ce76d4b61957c7da9 100644 --- a/Documentation/networking/net_cachelines/inet_connection_sock.rst +++ b/Documentation/networking/net_cachelines/inet_connection_sock.rst @@ -12,8 +12,7 @@ struct inet_sock icsk_inet read_mostly r struct request_sock_queue icsk_accept_queue struct inet_bind_bucket icsk_bind_hash read_mostly tcp_set_state struct inet_bind2_bucket icsk_bind2_hash read_mostly tcp_set_state,inet_put_port -unsigned_long icsk_timeout read_mostly inet_csk_reset_xmit_timer,tcp_connect -struct timer_list icsk_retransmit_timer read_mostly inet_csk_reset_xmit_timer,tcp_connect +struct timer_list icsk_retransmit_timer read_write inet_csk_reset_xmit_timer,tcp_connect struct timer_list icsk_delack_timer read_mostly inet_csk_reset_xmit_timer,tcp_connect u32 icsk_rto read_write tcp_cwnd_validate,tcp_schedule_loss_probe,tcp_connect_init,tcp_connect,tcp_write_xmit,tcp_push_one u32 icsk_rto_min diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h index f736d3097e43d97ee32f5d31f0e566536fe05a35..018118da0ce15c5ba5e3b7fcc1b36425794ec9a1 100644 --- a/include/net/inet_connection_sock.h +++ b/include/net/inet_connection_sock.h @@ -58,7 +58,6 @@ struct inet_connection_sock_af_ops { * @icsk_accept_queue: FIFO of established children * @icsk_bind_hash: Bind node * @icsk_bind2_hash: Bind node in the bhash2 table - * @icsk_timeout: Timeout * @icsk_retransmit_timer: Resend (no ack) * @icsk_rto: Retransmit timeout * @icsk_pmtu_cookie Last pmtu seen by socket @@ -85,7 +84,6 @@ struct inet_connection_sock { struct request_sock_queue icsk_accept_queue; struct inet_bind_bucket *icsk_bind_hash; struct inet_bind2_bucket *icsk_bind2_hash; - unsigned long icsk_timeout; struct timer_list icsk_retransmit_timer; struct timer_list icsk_delack_timer; __u32 icsk_rto; @@ -191,6 +189,12 @@ static inline void inet_csk_delack_init(struct sock *sk) memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack)); } +static inline unsigned long +icsk_timeout(const struct inet_connection_sock *icsk) +{ + return READ_ONCE(icsk->icsk_retransmit_timer.expires); +} + static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what) { struct inet_connection_sock *icsk = inet_csk(sk); @@ -229,8 +233,8 @@ static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what, if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0 || what == ICSK_TIME_LOSS_PROBE || what == ICSK_TIME_REO_TIMEOUT) { smp_store_release(&icsk->icsk_pending, what); - icsk->icsk_timeout = jiffies + when; - sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout); + when += jiffies; + sk_reset_timer(sk, &icsk->icsk_retransmit_timer, when); } else if (what == ICSK_TIME_DACK) { smp_store_release(&icsk->icsk_ack.pending, icsk->icsk_ack.pending | ICSK_ACK_TIMER); diff --git a/net/dccp/timer.c b/net/dccp/timer.c index a4cfb47b60e523bd4a8f1f47cfedc11e633945c6..9fd14a3361893d5f2d9f0ad18a65cff963cc7e22 100644 --- a/net/dccp/timer.c +++ b/net/dccp/timer.c @@ -139,9 +139,9 @@ static void dccp_write_timer(struct timer_list *t) if (sk->sk_state == DCCP_CLOSED || !icsk->icsk_pending) goto out; - if (time_after(icsk->icsk_timeout, jiffies)) { + if (time_after(icsk_timeout(icsk), jiffies)) { sk_reset_timer(sk, &icsk->icsk_retransmit_timer, - icsk->icsk_timeout); + icsk_timeout(icsk)); goto out; } diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c index efe2a085cf68e90cd1e79b5556e667a0fd044bfd..c2bb91d9e9ffd1fc7dc9bf048c1d6bbd75462997 100644 --- a/net/ipv4/inet_diag.c +++ b/net/ipv4/inet_diag.c @@ -315,12 +315,12 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, r->idiag_timer = 1; r->idiag_retrans = icsk->icsk_retransmits; r->idiag_expires = - jiffies_delta_to_msecs(icsk->icsk_timeout - jiffies); + jiffies_delta_to_msecs(icsk_timeout(icsk) - jiffies); } else if (icsk_pending == ICSK_TIME_PROBE0) { r->idiag_timer = 4; r->idiag_retrans = icsk->icsk_probes_out; r->idiag_expires = - jiffies_delta_to_msecs(icsk->icsk_timeout - jiffies); + jiffies_delta_to_msecs(icsk_timeout(icsk) - jiffies); } else if (timer_pending(&sk->sk_timer)) { r->idiag_timer = 2; r->idiag_retrans = icsk->icsk_probes_out; diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 4fa4fbb0ad12dba8b99f5698c74793743ba1bdaf..4ffc41990b6d271a356d9c5f208a9a927da39874 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -2925,10 +2925,10 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i) icsk_pending == ICSK_TIME_REO_TIMEOUT || icsk_pending == ICSK_TIME_LOSS_PROBE) { timer_active = 1; - timer_expires = icsk->icsk_timeout; + timer_expires = icsk_timeout(icsk); } else if (icsk_pending == ICSK_TIME_PROBE0) { timer_active = 4; - timer_expires = icsk->icsk_timeout; + timer_expires = icsk_timeout(icsk); } else if (timer_pending(&sk->sk_timer)) { timer_active = 2; timer_expires = sk->sk_timer.expires; diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c index 728bce01ccd3ddb1f374fa96b86434a415dbe2cb..d828b74c3e73d75cdae777645e8e8856c0751201 100644 --- a/net/ipv4/tcp_timer.c +++ b/net/ipv4/tcp_timer.c @@ -509,7 +509,7 @@ static bool tcp_rtx_probe0_timed_out(const struct sock *sk, * and tp->rcv_tstamp might very well have been written recently. * rcv_delta can thus be negative. */ - rcv_delta = icsk->icsk_timeout - tp->rcv_tstamp; + rcv_delta = icsk_timeout(icsk) - tp->rcv_tstamp; if (rcv_delta <= timeout) return false; @@ -685,7 +685,8 @@ out:; } /* Called with bottom-half processing disabled. - Called by tcp_write_timer() */ + * Called by tcp_write_timer() and tcp_release_cb(). + */ void tcp_write_timer_handler(struct sock *sk) { struct inet_connection_sock *icsk = inet_csk(sk); @@ -695,11 +696,11 @@ void tcp_write_timer_handler(struct sock *sk) !icsk->icsk_pending) return; - if (time_after(icsk->icsk_timeout, jiffies)) { - sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout); + if (time_after(icsk_timeout(icsk), jiffies)) { + sk_reset_timer(sk, &icsk->icsk_retransmit_timer, + icsk_timeout(icsk)); return; } - tcp_mstamp_refresh(tcp_sk(sk)); event = icsk->icsk_pending; diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index e182ee0a233046468b14832b0e4730b2846e1d43..988111f09a3e2c8850a0ac551c3a50cf3bb22824 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -2199,10 +2199,10 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i) icsk_pending == ICSK_TIME_REO_TIMEOUT || icsk_pending == ICSK_TIME_LOSS_PROBE) { timer_active = 1; - timer_expires = icsk->icsk_timeout; + timer_expires = icsk_timeout(icsk); } else if (icsk_pending == ICSK_TIME_PROBE0) { timer_active = 4; - timer_expires = icsk->icsk_timeout; + timer_expires = icsk_timeout(icsk); } else if (timer_pending(&sp->sk_timer)) { timer_active = 2; timer_expires = sp->sk_timer.expires; diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index ad780ae1d30dcb6ff72960b340e1472a1400618a..1ac378ba1d67cd17449ab6c4b4793b65d520ec44 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -422,7 +422,7 @@ static long mptcp_timeout_from_subflow(const struct mptcp_subflow_context *subfl const struct sock *ssk = mptcp_subflow_tcp_sock(subflow); return inet_csk(ssk)->icsk_pending && !subflow->stale_count ? - inet_csk(ssk)->icsk_timeout - jiffies : 0; + icsk_timeout(inet_csk(ssk)) - jiffies : 0; } static void mptcp_set_timeout(struct sock *sk) diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_tcp4.c b/tools/testing/selftests/bpf/progs/bpf_iter_tcp4.c index d22449c69363afe3c3aaae158f0ef0c6ef65916c..164640db3a29cf720e193453cab79f4bc317917c 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_tcp4.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_tcp4.c @@ -99,10 +99,10 @@ static int dump_tcp_sock(struct seq_file *seq, struct tcp_sock *tp, icsk->icsk_pending == ICSK_TIME_REO_TIMEOUT || icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { timer_active = 1; - timer_expires = icsk->icsk_timeout; + timer_expires = icsk->icsk_retransmit_timer.expires; } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { timer_active = 4; - timer_expires = icsk->icsk_timeout; + timer_expires = icsk->icsk_retransmit_timer.expires; } else if (timer_pending(&sp->sk_timer)) { timer_active = 2; timer_expires = sp->sk_timer.expires; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_tcp6.c b/tools/testing/selftests/bpf/progs/bpf_iter_tcp6.c index 8b072666f9d9a0ce023e7cb2c2716bf4a5bd3905..591c703f5032f024e4b511a6af8d63d1233a042a 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_tcp6.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_tcp6.c @@ -99,10 +99,10 @@ static int dump_tcp6_sock(struct seq_file *seq, struct tcp6_sock *tp, icsk->icsk_pending == ICSK_TIME_REO_TIMEOUT || icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { timer_active = 1; - timer_expires = icsk->icsk_timeout; + timer_expires = icsk->icsk_retransmit_timer.expires; } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { timer_active = 4; - timer_expires = icsk->icsk_timeout; + timer_expires = icsk->icsk_retransmit_timer.expires; } else if (timer_pending(&sp->sk_timer)) { timer_active = 2; timer_expires = sp->sk_timer.expires;

[v2,net-next,1/2] tcp/dccp: remove icsk->icsk_timeout

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