From nobody Sat Apr 11 13:20:09 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 A85F428690 for ; Thu, 2 Apr 2026 07:47:58 +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=1775116078; cv=none; b=QypzhRSJts6Zl3brOSRdDnljiN0+Awr9Com94ehpRzDJ+j4cmNEVV9P5TdNblw+mr2/Zw9dciR6Dii0w+JEap0lFKtIUzqj+9GciI7wzu54HoMTG/RfdMiXu7q27AxSDtKvB58A68E+v87dTUa7Qm5Mlg+NOihUtuqn5pLrdbfc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775116078; c=relaxed/simple; bh=JVurSmLyeZMlXBj4E7l1+mJJMl9u3MQsQjPhcbMEW8o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=e1AkaRUmwGIU0plZ3O0jARqWs18+FdGsUneARj18NSG65MJYuVHGIBbd1kmRaijWPagVGmsrYkneCb/bg9XmYqzhTTyu/xSndKrt72bBwaMCyEop8rLeV6iMCjiKA86o0smekKNp76gc0QX5tQ1g/yPD8aKIlaXnHvBTAw7Rad4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=W/IpIe/1; 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="W/IpIe/1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C1ABAC19423; Thu, 2 Apr 2026 07:47:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775116078; bh=JVurSmLyeZMlXBj4E7l1+mJJMl9u3MQsQjPhcbMEW8o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W/IpIe/1NUMzbe/FMIJK5Sho1typolq/tuBRB9FzcJzOd7nyw57NtRIeICsjvmVC8 cNVKGVrv9OPjvKmslE13pO7QIS4ck6WkTkkx8i1T5nq/LJka2nASwA0sGLSvMjBN6b Lidw8Y4KN2LOudyyrUX3HyuG4ldip2sNbDVIgqyrdn3G8T883nWySMZ6k5y/Y34XDS RU1mnxCSBlN2L4TA0F83DPCuhzALyjwGs3yDZP0eBZZCAyn0+BXE51YgsyHY9/XPQD IBTV671UAq5pO5fozxaF9eQV6dCNaghYUFOWFWjpqY0k/hAoRlXnSCFd9l2Rbwfxdj uNQffbAOTpQUA== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang , Gang Yan Subject: [RFC mptcp-next v12 01/15] tls: introduce struct tls_prot_ops Date: Thu, 2 Apr 2026 15:47:36 +0800 Message-ID: X-Mailer: git-send-email 2.51.0 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 | 20 +++++++++++ net/tls/tls_main.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 109 insertions(+) diff --git a/include/net/tls.h b/include/net/tls.h index ebd2550280ae..cf85f7a0c931 100644 --- a/include/net/tls.h +++ b/include/net/tls.h @@ -220,6 +220,26 @@ 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); + bool (*lock_is_held)(struct sock *sk); + 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..5ee7c7d60942 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 +1254,75 @@ 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->lock_is_held || + !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 bool tls_tcp_lock_is_held(struct sock *sk) +{ + return sock_owned_by_user_nocheck(sk); +} + +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, + .lock_is_held =3D tls_tcp_lock_is_held, + .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 +1341,8 @@ 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 2.51.0