From nobody Sun Mar 22 10:12:32 2026 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 AC75C3BC69C for ; Thu, 19 Mar 2026 10:08:59 +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=1773914939; cv=none; b=uvOujfsL/Ng1TFbc8vzVJiou5rG4HKquGFMIY0L3m7P9cJgmzYvGYCdO1WNpCYKN2qlJP/lnk6D3XkYOhMrSxYe0e4yhz/ZELwENjgS6sXRSCJpZ1kxkjslBqASCI8oZ/W0WuQYLkvKgJ/aUVNkQOvRm2rqnYZx8do77JNGvXq0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773914939; c=relaxed/simple; bh=UefsDU3FPKLQUMrAaw7Ven5+aMb/HMw3/+MaqT+6/gM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ID1te4VST3iJRYsGC1CmOS5PmgxyBmm0jmw9U9snCYISsByPuhz/tfKf6YlZT4SRAJDkAkM/Yl+P3LvQ/I2KcRWPBXyh5qBRMjjxqOi1/4MZFA0vhOIWVf6GLhsV+FVX5f3rRbDsXBGUl9zR/B95xv5q4UF+6nCKZoPSgRouwCA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uVoKzaqP; 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="uVoKzaqP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 64194C2BCAF; Thu, 19 Mar 2026 10:08:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773914939; bh=UefsDU3FPKLQUMrAaw7Ven5+aMb/HMw3/+MaqT+6/gM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uVoKzaqPROvI2tmObYgd2tID6Rxb9NN6ZGIVjTpTMmO9ICv+cpqFIRljP6lkOmUVi Vi5B+xV6QFtUUGMWmGyfXttLKHZ8FXeR1XEnBRVJPRiY80J9XdEgVHCkM5PvbxeMaM Mc6ytGNata3J4SkFBHGxkfgU+DztzW6znu/LPAkuYRmlPdN5eGW/DOdYbUmYqWB0Uk IHIa49TVxKZIAqg907tvGKChPpC4Kz/CDH5PEsZmGVRQoeiWAoNc1EW6ZseXZ7+uHS qUWK9aK9z/A0wxpnnQN+93jtlDHWvC7ECLHfi9mtWz6k6cFUhMSI4qMWLZcGOEAMtL hUfftOwZcy1RA== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang , Gang Yan Subject: [RFC mptcp-next v11 01/15] tls: introduce struct tls_prot_ops for protocol ops Date: Thu, 19 Mar 2026 18:08:34 +0800 Message-ID: <0b078c3c3ceda966bcc2f379c584f695a6a13f00.1773911536.git.tanggeliang@kylinos.cn> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Geliang Tang To extend MPTCP support based on TCP TLS, a tls_prot_ops structure has been introduced for TLS, encapsulating TCP-specific helpers within this structure. Add registering, validating and finding functions for this structure to add, validate and find a tls_prot_ops on the global list tls_prot_ops_list. Register TCP-specific structure tls_tcp_ops in tls_init(). Co-developed-by: Gang Yan Signed-off-by: Gang Yan Signed-off-by: Geliang Tang --- include/net/tls.h | 19 +++++++++++ net/tls/tls_main.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 101 insertions(+) diff --git a/include/net/tls.h b/include/net/tls.h index ebd2550280ae..40001110bccb 100644 --- a/include/net/tls.h +++ b/include/net/tls.h @@ -220,6 +220,25 @@ struct tls_prot_info { u16 tail_size; }; =20 +struct tls_prot_ops { + int protocol; + struct module *owner; + struct list_head list; + + int (*inq)(struct sock *sk); + int (*sendmsg_locked)(struct sock *sk, struct msghdr *msg, size_t size); + struct sk_buff *(*recv_skb)(struct sock *sk, u32 *off); + int (*read_sock)(struct sock *sk, read_descriptor_t *desc, + sk_read_actor_t recv_actor); + void (*read_done)(struct sock *sk, size_t len); + u32 (*get_skb_off)(struct sk_buff *skb); + u32 (*get_skb_seq)(struct sk_buff *skb); + __poll_t (*poll)(struct file *file, struct socket *sock, + struct poll_table_struct *wait); + bool (*epollin_ready)(const struct sock *sk); + void (*check_app_limited)(struct sock *sk); +}; + struct tls_context { /* read-only cache line */ struct tls_prot_info prot_info; diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c index fd39acf41a61..e628b729cbd3 100644 --- a/net/tls/tls_main.c +++ b/net/tls/tls_main.c @@ -128,6 +128,24 @@ static struct proto_ops tls_proto_ops[TLS_NUM_PROTS][T= LS_NUM_CONFIG][TLS_NUM_CON static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], const struct proto *base); =20 +static DEFINE_SPINLOCK(tls_prot_ops_lock); +static LIST_HEAD(tls_prot_ops_list); + +/* Must be called with rcu read lock held */ +static struct tls_prot_ops *tls_prot_ops_find(int protocol) +{ + struct tls_prot_ops *ops, *ret =3D NULL; + + list_for_each_entry_rcu(ops, &tls_prot_ops_list, list) { + if (ops->protocol =3D=3D protocol) { + ret =3D ops; + break; + } + } + + return ret; +} + void update_sk_prot(struct sock *sk, struct tls_context *ctx) { int ip_ver =3D sk->sk_family =3D=3D AF_INET6 ? TLSV6 : TLSV4; @@ -1236,6 +1254,68 @@ static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mos= tly =3D { .get_info_size =3D tls_get_info_size, }; =20 +static int tls_validate_prot_ops(const struct tls_prot_ops *ops) +{ + if (!ops->inq || !ops->sendmsg_locked || + !ops->recv_skb || !ops->read_sock || + !ops->read_done || !ops->get_skb_seq || + !ops->poll || !ops->epollin_ready || + !ops->check_app_limited) { + pr_err("%d does not implement required ops\n", ops->protocol); + return -EINVAL; + } + + return 0; +} + +static int tls_register_prot_ops(struct tls_prot_ops *ops) +{ + int ret; + + ret =3D tls_validate_prot_ops(ops); + if (ret) + return ret; + + spin_lock(&tls_prot_ops_lock); + if (tls_prot_ops_find(ops->protocol)) { + spin_unlock(&tls_prot_ops_lock); + return -EEXIST; + } + list_add_tail_rcu(&ops->list, &tls_prot_ops_list); + spin_unlock(&tls_prot_ops_lock); + + pr_debug("tls_prot_ops %d registered\n", ops->protocol); + return 0; +} + +static struct sk_buff *tls_tcp_recv_skb(struct sock *sk, u32 *off) +{ + return tcp_recv_skb(sk, tcp_sk(sk)->copied_seq, off); +} + +static u32 tls_tcp_get_skb_seq(struct sk_buff *skb) +{ + return TCP_SKB_CB(skb)->seq; +} + +static bool tls_tcp_epollin_ready(const struct sock *sk) +{ + return tcp_epollin_ready(sk, INT_MAX); +} + +static struct tls_prot_ops tls_tcp_ops =3D { + .protocol =3D IPPROTO_TCP, + .inq =3D tcp_inq, + .sendmsg_locked =3D tcp_sendmsg_locked, + .recv_skb =3D tls_tcp_recv_skb, + .read_sock =3D tcp_read_sock, + .read_done =3D tcp_read_done, + .get_skb_seq =3D tls_tcp_get_skb_seq, + .poll =3D tcp_poll, + .epollin_ready =3D tls_tcp_epollin_ready, + .check_app_limited =3D tcp_rate_check_app_limited, +}; + static int __init tls_register(void) { int err; @@ -1254,6 +1334,8 @@ static int __init tls_register(void) =20 tcp_register_ulp(&tcp_tls_ulp_ops); =20 + tls_register_prot_ops(&tls_tcp_ops); + return 0; err_strp: tls_strp_dev_exit(); --=20 2.53.0