[net-next,2/6] rstreason: prepare for passive reset

Message ID	20240403073144.35036-3-kerneljasonxing@gmail.com (mailing list archive)
State	Superseded
Delegated to:	Netdev Maintainers
Headers	show Received: from mail-pl1-f172.google.com (mail-pl1-f172.google.com [209.85.214.172]) (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 8CB0D5B200; Wed, 3 Apr 2024 07:32:09 +0000 (UTC) From: Jason Xing <kerneljasonxing@gmail.com> To: edumazet@google.com, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, rostedt@goodmis.org, kuba@kernel.org, pabeni@redhat.com, davem@davemloft.net, matttbe@kernel.org, martineau@kernel.org, geliang@kernel.org Cc: mptcp@lists.linux.dev, netdev@vger.kernel.org, linux-trace-kernel@vger.kernel.org, kerneljasonxing@gmail.com, Jason Xing <kernelxing@tencent.com> Subject: [PATCH net-next 2/6] rstreason: prepare for passive reset Date: Wed, 3 Apr 2024 15:31:40 +0800 Message-Id: <20240403073144.35036-3-kerneljasonxing@gmail.com> In-Reply-To: <20240403073144.35036-1-kerneljasonxing@gmail.com> References: <20240403073144.35036-1-kerneljasonxing@gmail.com> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	Implement reset reason mechanism to detect \| expand [net-next,0/6] Implement reset reason mechanism to detect [net-next,1/6] net: introduce rstreason to detect why the RST is sent [net-next,2/6] rstreason: prepare for passive reset [net-next,3/6] rstreason: prepare for active reset [net-next,4/6] tcp: support rstreason for passive reset [net-next,5/6] mptcp: support rstreason for passive reset [net-next,6/6] rstreason: make it work in trace world

Context	Check	Description
netdev/tree_selection	success	Clearly marked for net-next, async
netdev/apply	fail	Patch does not apply to net-next-1

diff --git a/include/net/request_sock.h b/include/net/request_sock.h index 004e651e6067..93f9fee7e52f 100644 --- a/include/net/request_sock.h +++ b/include/net/request_sock.h @@ -34,7 +34,8 @@ struct request_sock_ops { void (*send_ack)(const struct sock *sk, struct sk_buff *skb, struct request_sock *req); void (*send_reset)(const struct sock *sk, - struct sk_buff *skb); + struct sk_buff *skb, + int reason); void (*destructor)(struct request_sock *req); void (*syn_ack_timeout)(const struct request_sock *req); }; diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index 44b033fe1ef6..628dd783e8f3 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -24,6 +24,7 @@ #include <net/xfrm.h> #include <net/secure_seq.h> #include <net/netns/generic.h> +#include <net/rstreason.h> #include "ackvec.h" #include "ccid.h" @@ -521,7 +522,8 @@ static int dccp_v4_send_response(const struct sock *sk, struct request_sock *req return err; } -static void dccp_v4_ctl_send_reset(const struct sock *sk, struct sk_buff *rxskb) +static void dccp_v4_ctl_send_reset(const struct sock *sk, struct sk_buff *rxskb, + int reason) { int err; const struct iphdr *rxiph; @@ -706,7 +708,7 @@ int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb) return 0; reset: - dccp_v4_ctl_send_reset(sk, skb); + dccp_v4_ctl_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); kfree_skb(skb); return 0; } @@ -869,7 +871,7 @@ static int dccp_v4_rcv(struct sk_buff *skb) if (nsk == sk) { reqsk_put(req); } else if (dccp_child_process(sk, nsk, skb)) { - dccp_v4_ctl_send_reset(sk, skb); + dccp_v4_ctl_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); goto discard_and_relse; } else { sock_put(sk); @@ -909,7 +911,7 @@ static int dccp_v4_rcv(struct sk_buff *skb) if (dh->dccph_type != DCCP_PKT_RESET) { DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION; - dccp_v4_ctl_send_reset(sk, skb); + dccp_v4_ctl_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); } discard_it: diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c index ded07e09f813..d64f39e26e87 100644 --- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -29,6 +29,7 @@ #include <net/secure_seq.h> #include <net/netns/generic.h> #include <net/sock.h> +#include <net/rstreason.h> #include "dccp.h" #include "ipv6.h" @@ -256,7 +257,8 @@ static void dccp_v6_reqsk_destructor(struct request_sock *req) kfree_skb(inet_rsk(req)->pktopts); } -static void dccp_v6_ctl_send_reset(const struct sock *sk, struct sk_buff *rxskb) +static void dccp_v6_ctl_send_reset(const struct sock *sk, struct sk_buff *rxskb, + int reason) { const struct ipv6hdr *rxip6h; struct sk_buff *skb; @@ -656,7 +658,7 @@ static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb) return 0; reset: - dccp_v6_ctl_send_reset(sk, skb); + dccp_v6_ctl_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); discard: if (opt_skb != NULL) __kfree_skb(opt_skb); @@ -762,7 +764,7 @@ static int dccp_v6_rcv(struct sk_buff *skb) if (nsk == sk) { reqsk_put(req); } else if (dccp_child_process(sk, nsk, skb)) { - dccp_v6_ctl_send_reset(sk, skb); + dccp_v6_ctl_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); goto discard_and_relse; } else { sock_put(sk); @@ -801,7 +803,7 @@ static int dccp_v6_rcv(struct sk_buff *skb) if (dh->dccph_type != DCCP_PKT_RESET) { DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION; - dccp_v6_ctl_send_reset(sk, skb); + dccp_v6_ctl_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); } discard_it: diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c index 64d805b27add..251a57cf5822 100644 --- a/net/dccp/minisocks.c +++ b/net/dccp/minisocks.c @@ -15,6 +15,7 @@ #include <net/sock.h> #include <net/xfrm.h> #include <net/inet_timewait_sock.h> +#include <net/rstreason.h> #include "ackvec.h" #include "ccid.h" @@ -202,7 +203,7 @@ struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb, DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_TOO_BUSY; drop: if (dccp_hdr(skb)->dccph_type != DCCP_PKT_RESET) - req->rsk_ops->send_reset(sk, skb); + req->rsk_ops->send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); inet_csk_reqsk_queue_drop(sk, req); out: diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 0d47b48f8cfd..1c8248abe37a 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -70,6 +70,7 @@ #include <net/xfrm.h> #include <net/secure_seq.h> #include <net/busy_poll.h> +#include <net/rstreason.h> #include <linux/inet.h> #include <linux/ipv6.h> @@ -723,7 +724,8 @@ static bool tcp_v4_ao_sign_reset(const struct sock *sk, struct sk_buff *skb, * Exception: precedence violation. We do not implement it in any case. */ -static void tcp_v4_send_reset(const struct sock *sk, struct sk_buff *skb) +static void tcp_v4_send_reset(const struct sock *sk, struct sk_buff *skb, + int reason) { const struct tcphdr *th = tcp_hdr(skb); struct { @@ -1933,7 +1935,7 @@ int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb) return 0; reset: - tcp_v4_send_reset(rsk, skb); + tcp_v4_send_reset(rsk, skb, SK_RST_REASON_NOT_SPECIFIED); discard: kfree_skb_reason(skb, reason); /* Be careful here. If this function gets more complicated and @@ -2278,7 +2280,7 @@ int tcp_v4_rcv(struct sk_buff *skb) } else { drop_reason = tcp_child_process(sk, nsk, skb); if (drop_reason) { - tcp_v4_send_reset(nsk, skb); + tcp_v4_send_reset(nsk, skb, SK_RST_REASON_NOT_SPECIFIED); goto discard_and_relse; } sock_put(sk); @@ -2356,7 +2358,7 @@ int tcp_v4_rcv(struct sk_buff *skb) bad_packet: __TCP_INC_STATS(net, TCP_MIB_INERRS); } else { - tcp_v4_send_reset(NULL, skb); + tcp_v4_send_reset(NULL, skb, SK_RST_REASON_NOT_SPECIFIED); } discard_it: @@ -2407,7 +2409,7 @@ int tcp_v4_rcv(struct sk_buff *skb) tcp_v4_timewait_ack(sk, skb); break; case TCP_TW_RST: - tcp_v4_send_reset(sk, skb); + tcp_v4_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); inet_twsk_deschedule_put(inet_twsk(sk)); goto discard_it; case TCP_TW_SUCCESS:; diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c index f0761f060a83..d2d42edb8140 100644 --- a/net/ipv4/tcp_minisocks.c +++ b/net/ipv4/tcp_minisocks.c @@ -22,6 +22,7 @@ #include <net/tcp.h> #include <net/xfrm.h> #include <net/busy_poll.h> +#include <net/rstreason.h> static bool tcp_in_window(u32 seq, u32 end_seq, u32 s_win, u32 e_win) { @@ -879,7 +880,7 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb, * avoid becoming vulnerable to outside attack aiming at * resetting legit local connections. */ - req->rsk_ops->send_reset(sk, skb); + req->rsk_ops->send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); } else if (fastopen) { /* received a valid RST pkt */ reqsk_fastopen_remove(sk, req, true); tcp_reset(sk, skb); diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 8e9c59b6c00c..f143b658fb71 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -60,6 +60,7 @@ #include <net/secure_seq.h> #include <net/hotdata.h> #include <net/busy_poll.h> +#include <net/rstreason.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> @@ -69,7 +70,8 @@ #include <trace/events/tcp.h> -static void tcp_v6_send_reset(const struct sock *sk, struct sk_buff *skb); +static void tcp_v6_send_reset(const struct sock *sk, struct sk_buff *skb, + int reason); static void tcp_v6_reqsk_send_ack(const struct sock *sk, struct sk_buff *skb, struct request_sock *req); @@ -1006,7 +1008,8 @@ static void tcp_v6_send_response(const struct sock *sk, struct sk_buff *skb, u32 kfree_skb(buff); } -static void tcp_v6_send_reset(const struct sock *sk, struct sk_buff *skb) +static void tcp_v6_send_reset(const struct sock *sk, struct sk_buff *skb, + int reason) { const struct tcphdr *th = tcp_hdr(skb); struct ipv6hdr *ipv6h = ipv6_hdr(skb); @@ -1675,7 +1678,7 @@ int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb) return 0; reset: - tcp_v6_send_reset(sk, skb); + tcp_v6_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); discard: if (opt_skb) __kfree_skb(opt_skb); @@ -1861,7 +1864,7 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff *skb) } else { drop_reason = tcp_child_process(sk, nsk, skb); if (drop_reason) { - tcp_v6_send_reset(nsk, skb); + tcp_v6_send_reset(nsk, skb, SK_RST_REASON_NOT_SPECIFIED); goto discard_and_relse; } sock_put(sk); @@ -1937,7 +1940,7 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff *skb) bad_packet: __TCP_INC_STATS(net, TCP_MIB_INERRS); } else { - tcp_v6_send_reset(NULL, skb); + tcp_v6_send_reset(NULL, skb, SK_RST_REASON_NOT_SPECIFIED); } discard_it: @@ -1992,7 +1995,7 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff *skb) tcp_v6_timewait_ack(sk, skb); break; case TCP_TW_RST: - tcp_v6_send_reset(sk, skb); + tcp_v6_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); inet_twsk_deschedule_put(inet_twsk(sk)); goto discard_it; case TCP_TW_SUCCESS: diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 1626dd20c68f..3b1c13136908 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -20,6 +20,8 @@ #include <net/transp_v6.h> #endif #include <net/mptcp.h> +#include <net/rstreason.h> + #include "protocol.h" #include "mib.h" @@ -302,7 +304,7 @@ static struct dst_entry *subflow_v4_route_req(const struct sock *sk, dst_release(dst); if (!req->syncookie) - tcp_request_sock_ops.send_reset(sk, skb); + tcp_request_sock_ops.send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); return NULL; } @@ -369,7 +371,7 @@ static struct dst_entry *subflow_v6_route_req(const struct sock *sk, dst_release(dst); if (!req->syncookie) - tcp6_request_sock_ops.send_reset(sk, skb); + tcp6_request_sock_ops.send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); return NULL; } #endif @@ -899,7 +901,7 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk, tcp_rsk(req)->drop_req = true; inet_csk_prepare_for_destroy_sock(child); tcp_done(child); - req->rsk_ops->send_reset(sk, skb); + req->rsk_ops->send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED); /* The last child reference will be released by the caller */ return child;

[net-next,2/6] rstreason: prepare for passive reset

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