From patchwork Thu Jun 6 23:25:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Safonov via B4 Relay X-Patchwork-Id: 13689051 X-Patchwork-Delegate: kuba@kernel.org 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 8D06C13C3F6; Thu, 6 Jun 2024 23:26:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717716374; cv=none; b=gpTf8HV6KzF6Pi+Prxz72xKmDO4cyCRkPcPzdH8cfzDOdH7iMVGWzZcAEbXzFMXV3rWwGIQnDoe/r1F55lmEeSB2t1Qoj5LAyQ9F9BHvyTXcuLHgONb5rCbwsDesMZ5EB9oELuM42Gk/WZq9jJMUlV2rEkpKATsZXtY8ns/Mdcg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717716374; c=relaxed/simple; bh=yLUQd9kDt9LtaEhdg8XdIedu01kPhg8wpAZffv0TQzk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ZdsYdro0ywlN6Bw7v9Wf8NwI7/FocmHxBCKhAMNOUWVEnioo/WO/irIkXNA1HOw7f8KMvaiGUDPS/RCgjOpMeotG8kbuEzpuMP08hXpGDWHXdix0aPGDDBBg/Trz1OQ5zHlyw1GwTzyr56liNQ0g4NlD1D+N/FoYQyHotRjyqec= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=feWMJnMI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="feWMJnMI" Received: by smtp.kernel.org (Postfix) with ESMTPS id 35E77C4AF0C; Thu, 6 Jun 2024 23:26:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1717716374; bh=yLUQd9kDt9LtaEhdg8XdIedu01kPhg8wpAZffv0TQzk=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=feWMJnMIpT7t3flztcffrOd9ch19x5crhXiQUt8x/k8s/7NtkeOuswoXMe5/rlCgw +grZ+TFQ6H7wKihoUTpmxqCxpROILHcCSTeHcby44/WpaU1o9q+D/QQmSi08o0swfi 43mDof33k0TW3S3mZWMOQer428fe+RVbzANwgyx9Y+vV8HhV+M2nrUGjdta+JpsaP5 80UebWw8W6gNQLm8gFoAqDVNKfs8SXpDp9iRE+lY3SD9VTXKuyJv8a1IHaZEJyUgsa tKtY6raYNmxI9iWrLMgO1D2swghkyePuGJmDtJBOoe1d3usMblQj9zzN0kMsTAwvPi d21F3zRPm04IA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 26F11C27C52; Thu, 6 Jun 2024 23:26:14 +0000 (UTC) From: Dmitry Safonov via B4 Relay Date: Fri, 07 Jun 2024 00:25:57 +0100 Subject: [PATCH net-next v4 3/6] net/tcp: Move tcp_inbound_hash() from headers Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240607-tcp_ao-tracepoints-v4-3-88dc245c1f39@gmail.com> References: <20240607-tcp_ao-tracepoints-v4-0-88dc245c1f39@gmail.com> In-Reply-To: <20240607-tcp_ao-tracepoints-v4-0-88dc245c1f39@gmail.com> To: Eric Dumazet , "David S. Miller" , Jakub Kicinski , Paolo Abeni , David Ahern , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet Cc: Mohammad Nassiri , Simon Horman , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Dmitry Safonov <0x7f454c46@gmail.com> X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1717716372; l=7187; i=0x7f454c46@gmail.com; s=20240410; h=from:subject:message-id; bh=fSgaLj9RcD4LldAhS9J1+qpbBogdrXedjmE5b/VoFPI=; b=Ymichd4x8l8sOS6nqDzv/+6nSobLyj9sxu1l+FFMHhCCkdFWrzpq881eWhvQE5i7FhJb0CJQ9Qfa p5K5cQ+/ClJLqy0+k0tAVP2fVSOoRUVyi6Z51B7o2RrKwyBd37zq X-Developer-Key: i=0x7f454c46@gmail.com; a=ed25519; pk=cFSWovqtkx0HrT5O9jFCEC/Cef4DY8a2FPeqP4THeZQ= X-Endpoint-Received: by B4 Relay for 0x7f454c46@gmail.com/20240410 with auth_id=152 X-Original-From: Dmitry Safonov <0x7f454c46@gmail.com> Reply-To: 0x7f454c46@gmail.com X-Patchwork-Delegate: kuba@kernel.org From: Dmitry Safonov <0x7f454c46@gmail.com> Two reasons: 1. It's grown up enough 2. In order to not do header spaghetti by including , which is necessary for TCP tracepoints. While at it, unexport and make static tcp_inbound_ao_hash(). Reviewed-by: Eric Dumazet Signed-off-by: Dmitry Safonov <0x7f454c46@gmail.com> --- include/net/tcp.h | 78 +++---------------------------------------------------- net/ipv4/tcp.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 76 insertions(+), 76 deletions(-) diff --git a/include/net/tcp.h b/include/net/tcp.h index e5427b05129b..2aac11e7e1cc 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1863,12 +1863,6 @@ tcp_md5_do_lookup_any_l3index(const struct sock *sk, return __tcp_md5_do_lookup(sk, 0, addr, family, true); } -enum skb_drop_reason -tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb, - const void *saddr, const void *daddr, - int family, int l3index, const __u8 *hash_location); - - #define tcp_twsk_md5_key(twsk) ((twsk)->tw_md5_key) #else static inline struct tcp_md5sig_key * @@ -1885,13 +1879,6 @@ tcp_md5_do_lookup_any_l3index(const struct sock *sk, return NULL; } -static inline enum skb_drop_reason -tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb, - const void *saddr, const void *daddr, - int family, int l3index, const __u8 *hash_location) -{ - return SKB_NOT_DROPPED_YET; -} #define tcp_twsk_md5_key(twsk) NULL #endif @@ -2806,66 +2793,9 @@ static inline bool tcp_ao_required(struct sock *sk, const void *saddr, return false; } -/* Called with rcu_read_lock() */ -static inline enum skb_drop_reason -tcp_inbound_hash(struct sock *sk, const struct request_sock *req, - const struct sk_buff *skb, - const void *saddr, const void *daddr, - int family, int dif, int sdif) -{ - const struct tcphdr *th = tcp_hdr(skb); - const struct tcp_ao_hdr *aoh; - const __u8 *md5_location; - int l3index; - - /* Invalid option or two times meet any of auth options */ - if (tcp_parse_auth_options(th, &md5_location, &aoh)) { - tcp_hash_fail("TCP segment has incorrect auth options set", - family, skb, ""); - return SKB_DROP_REASON_TCP_AUTH_HDR; - } - - if (req) { - if (tcp_rsk_used_ao(req) != !!aoh) { - NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPAOBAD); - tcp_hash_fail("TCP connection can't start/end using TCP-AO", - family, skb, "%s", - !aoh ? "missing AO" : "AO signed"); - return SKB_DROP_REASON_TCP_AOFAILURE; - } - } - - /* sdif set, means packet ingressed via a device - * in an L3 domain and dif is set to the l3mdev - */ - l3index = sdif ? dif : 0; - - /* Fast path: unsigned segments */ - if (likely(!md5_location && !aoh)) { - /* Drop if there's TCP-MD5 or TCP-AO key with any rcvid/sndid - * for the remote peer. On TCP-AO established connection - * the last key is impossible to remove, so there's - * always at least one current_key. - */ - if (tcp_ao_required(sk, saddr, family, l3index, true)) { - tcp_hash_fail("AO hash is required, but not found", - family, skb, "L3 index %d", l3index); - return SKB_DROP_REASON_TCP_AONOTFOUND; - } - if (unlikely(tcp_md5_do_lookup(sk, l3index, saddr, family))) { - NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND); - tcp_hash_fail("MD5 Hash not found", - family, skb, "L3 index %d", l3index); - return SKB_DROP_REASON_TCP_MD5NOTFOUND; - } - return SKB_NOT_DROPPED_YET; - } - - if (aoh) - return tcp_inbound_ao_hash(sk, skb, family, req, l3index, aoh); - - return tcp_inbound_md5_hash(sk, skb, saddr, daddr, family, - l3index, md5_location); -} +enum skb_drop_reason tcp_inbound_hash(struct sock *sk, + const struct request_sock *req, const struct sk_buff *skb, + const void *saddr, const void *daddr, + int family, int dif, int sdif); #endif /* _TCP_H */ diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 6553221694ec..17a4a8e4855d 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -4463,7 +4463,7 @@ int tcp_md5_hash_key(struct tcp_sigpool *hp, EXPORT_SYMBOL(tcp_md5_hash_key); /* Called with rcu_read_lock() */ -enum skb_drop_reason +static enum skb_drop_reason tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb, const void *saddr, const void *daddr, int family, int l3index, const __u8 *hash_location) @@ -4517,10 +4517,80 @@ tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb, } return SKB_NOT_DROPPED_YET; } -EXPORT_SYMBOL(tcp_inbound_md5_hash); +#else +static inline enum skb_drop_reason +tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb, + const void *saddr, const void *daddr, + int family, int l3index, const __u8 *hash_location) +{ + return SKB_NOT_DROPPED_YET; +} #endif +/* Called with rcu_read_lock() */ +enum skb_drop_reason +tcp_inbound_hash(struct sock *sk, const struct request_sock *req, + const struct sk_buff *skb, + const void *saddr, const void *daddr, + int family, int dif, int sdif) +{ + const struct tcphdr *th = tcp_hdr(skb); + const struct tcp_ao_hdr *aoh; + const __u8 *md5_location; + int l3index; + + /* Invalid option or two times meet any of auth options */ + if (tcp_parse_auth_options(th, &md5_location, &aoh)) { + tcp_hash_fail("TCP segment has incorrect auth options set", + family, skb, ""); + return SKB_DROP_REASON_TCP_AUTH_HDR; + } + + if (req) { + if (tcp_rsk_used_ao(req) != !!aoh) { + NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPAOBAD); + tcp_hash_fail("TCP connection can't start/end using TCP-AO", + family, skb, "%s", + !aoh ? "missing AO" : "AO signed"); + return SKB_DROP_REASON_TCP_AOFAILURE; + } + } + + /* sdif set, means packet ingressed via a device + * in an L3 domain and dif is set to the l3mdev + */ + l3index = sdif ? dif : 0; + + /* Fast path: unsigned segments */ + if (likely(!md5_location && !aoh)) { + /* Drop if there's TCP-MD5 or TCP-AO key with any rcvid/sndid + * for the remote peer. On TCP-AO established connection + * the last key is impossible to remove, so there's + * always at least one current_key. + */ + if (tcp_ao_required(sk, saddr, family, l3index, true)) { + tcp_hash_fail("AO hash is required, but not found", + family, skb, "L3 index %d", l3index); + return SKB_DROP_REASON_TCP_AONOTFOUND; + } + if (unlikely(tcp_md5_do_lookup(sk, l3index, saddr, family))) { + NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND); + tcp_hash_fail("MD5 Hash not found", + family, skb, "L3 index %d", l3index); + return SKB_DROP_REASON_TCP_MD5NOTFOUND; + } + return SKB_NOT_DROPPED_YET; + } + + if (aoh) + return tcp_inbound_ao_hash(sk, skb, family, req, l3index, aoh); + + return tcp_inbound_md5_hash(sk, skb, saddr, daddr, family, + l3index, md5_location); +} +EXPORT_SYMBOL_GPL(tcp_inbound_hash); + void tcp_done(struct sock *sk) { struct request_sock *req;