From nobody Sun Feb 8 05:08:24 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 E0E9D29993E for ; Mon, 2 Feb 2026 09:22:04 +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=1770024125; cv=none; b=UKP5MGQ+u0vQlgh3MICeESJTHvFStJzwGkYYIcs5drJrZ7JBHhanC/eM0x+aIF4kPEr1BvdL2+j4LMwgCS1fNpZxfUWMkszSs2KXfqb4odvdO+e2xtbj3JCdaAME+jRkbD1y+9D43C9zKPC4qtq5ajf/CXz050CkTmmw8MXuGaY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770024125; c=relaxed/simple; bh=CaLBCBga42CsLOU6PcsL5+S7QjugBExe4T/ZY/Qh0Js=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uC4bLDtzZA1Su7KNtQRjF95TNy5VZx1N48I26Qg+lBNU80WOXjhQ5QH8P441eb3w8XPr7OR/8NePSJgFIJe9M9qw4Dn8c00Ovc7aiJWdk8sgsa8GyKcky1K6k0aC7F6ov7LtShg5iKB0dh4vmis2i9M6F9Kb1Zp0/gJ8c/INo9k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DAVwamP8; 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="DAVwamP8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 96122C116D0; Mon, 2 Feb 2026 09:22:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770024124; bh=CaLBCBga42CsLOU6PcsL5+S7QjugBExe4T/ZY/Qh0Js=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DAVwamP8iqbUDp1ehCPTOtN92rnzv55ZV7dQRjdKRD69u+Ftfh771OjHvXlP+vlBS eA7D5NYeCjvLU/OuUlOG8TGNQwSRl/q62YP8gw+dgVf5ZCMt7KEJ5I+usmR+vlHmX7 JiWf0BsCrls9SxvSwo38zpgtuEJmPWp4ohy/PPkXpCP7OKQ+3SXSYPieT8zzySrqDn g+vc2Ny9RDOIMUIK3rYVQ2HjvFJd2K4TzLXxz3ypCCkxNQysW+WtQSwRGwYvD9Am3Z KCumGf9KotTYwe9HXUoMzVzW7GP50LD321WLAHoVpeLr1GslmXU2ZOa/hA9c8wKFES llC42rtkKlmTQ== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next 1/3] tcp: export do_tcp_splice_eof Date: Mon, 2 Feb 2026 17:21:49 +0800 Message-ID: X-Mailer: git-send-email 2.52.0 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 Extract a do_tcp_splice_eof() helper from tcp_splice_eof() and export it to net/tcp.h, so that it can be used in MPTCP. Signed-off-by: Geliang Tang --- include/net/tcp.h | 1 + net/ipv4/tcp.c | 8 ++++++-- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/include/net/tcp.h b/include/net/tcp.h index cecec1a92d5e..9564fd7b73c7 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -370,6 +370,7 @@ int tcp_sendmsg(struct sock *sk, struct msghdr *msg, si= ze_t size); int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size); int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg, int *copied, size_t size, struct ubuf_info *uarg); +void do_tcp_splice_eof(struct sock *sk); void tcp_splice_eof(struct socket *sock); int tcp_send_mss(struct sock *sk, int *size_goal, int flags); int tcp_wmem_schedule(struct sock *sk, int copy); diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index ae0000215ff4..80d374fe6543 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1468,9 +1468,8 @@ int tcp_sendmsg(struct sock *sk, struct msghdr *msg, = size_t size) } EXPORT_SYMBOL(tcp_sendmsg); =20 -void tcp_splice_eof(struct socket *sock) +void do_tcp_splice_eof(struct sock *sk) { - struct sock *sk =3D sock->sk; struct tcp_sock *tp =3D tcp_sk(sk); int mss_now, size_goal; =20 @@ -1482,6 +1481,11 @@ void tcp_splice_eof(struct socket *sock) tcp_push(sk, 0, mss_now, tp->nonagle, size_goal); release_sock(sk); } + +void tcp_splice_eof(struct socket *sock) +{ + do_tcp_splice_eof(sock->sk); +} EXPORT_IPV6_MOD_GPL(tcp_splice_eof); =20 /* --=20 2.51.0 From nobody Sun Feb 8 05:08:24 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 0B4E22C032E for ; Mon, 2 Feb 2026 09:22:06 +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=1770024127; cv=none; b=R/8fRRRpEohOGQpqoIKksFzqpF7m9IMAIvNKn3gsuy95O4dfBv6Tlyx6RMcizl/CkGhH/XITgkXrkGdDSumsxVk3N+BwU0phnYhc5KTScasgWEntmLhwRAQQifQSepikE0F09LFBg+iyMEdBD2rSBSN/LvKdt918Otlu6XuCrpg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770024127; c=relaxed/simple; bh=SSKgcmQCzsRkGbWx/PhgVdINC1OAKmnrTv959idBzyw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZVZeDi0PJFcwiXXeQ7/xS2sPGRS4RlujNLW/tbSdF1rFrhrDKqoXTSLBfQ0ROg/se9TBfFqPjiXJLvraJCOtdLYguDWnQVx+zmLoP+musRtYZ/rHw3Y0XYaPQRgMrTKsTtCURyYUpRyhXTW6ZXm7lW5idm60v2bf7w7gxaVgJD0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WngQiKw5; 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="WngQiKw5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5D27FC116C6; Mon, 2 Feb 2026 09:22:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770024126; bh=SSKgcmQCzsRkGbWx/PhgVdINC1OAKmnrTv959idBzyw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WngQiKw5fDodeOe64W3LhWxjEMBw0PCCzeHXUUDf6C+7fZRLVv03KWf/LGpEQWoDi mTxDuYfnELVYezgN3kouZZWnLz3EV8p7TF+g4Xk95f6yJ33vkxnBf22doOnoZQWrPN Aae6Kz17gUKOghpydYyYPgg4o7OoAfGyFcOKpQqvNlLln5ibTeKIIhJt2n/h/wZEHB OIB/Y3o7TO62bTuM1e32gk0lL7knjBoItWkPMSiBUu2poseRcwUS5K1psyGcD3WvTr yzu/bz77v/1cOfj1XNWO6BeiwX1oHxFl+sjvIQxD9e95fNHax7DkbH4aizCJI0aRDY vGxprLJs5f16g== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang , Matthieu Baerts Subject: [PATCH mptcp-next 2/3] mptcp: implement .splice_eof Date: Mon, 2 Feb 2026 17:21:50 +0800 Message-ID: <9e3dddfc65f24c1a11e5f0353b497f1d4f1c6f82.1770023932.git.tanggeliang@kylinos.cn> X-Mailer: git-send-email 2.52.0 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 This patch implements the .splice_eof interface for MPTCP, namely mptcp_splice_eof(), which sequentially calls do_tcp_splice_eof() for each subflow. Suggested-by: Matthieu Baerts Signed-off-by: Geliang Tang --- net/mptcp/protocol.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index c88882062c40..5635d196cb9f 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -4018,6 +4018,20 @@ static int mptcp_connect(struct sock *sk, struct soc= kaddr_unsized *uaddr, return 0; } =20 +static void mptcp_splice_eof(struct socket *sock) +{ + struct mptcp_subflow_context *subflow; + struct sock *sk =3D sock->sk, *ssk; + + lock_sock(sk); + mptcp_for_each_subflow(mptcp_sk(sk), subflow) { + ssk =3D mptcp_subflow_tcp_sock(subflow); + + do_tcp_splice_eof(ssk); + } + release_sock(sk); +} + static struct proto mptcp_prot =3D { .name =3D "MPTCP", .owner =3D THIS_MODULE, @@ -4049,6 +4063,7 @@ static struct proto mptcp_prot =3D { .obj_size =3D sizeof(struct mptcp_sock), .slab_flags =3D SLAB_TYPESAFE_BY_RCU, .no_autobind =3D true, + .splice_eof =3D mptcp_splice_eof, }; =20 static int mptcp_bind(struct socket *sock, struct sockaddr_unsized *uaddr,= int addr_len) @@ -4540,6 +4555,7 @@ static const struct proto_ops mptcp_stream_ops =3D { .set_rcvlowat =3D mptcp_set_rcvlowat, .read_sock =3D mptcp_read_sock, .splice_read =3D mptcp_splice_read, + .splice_eof =3D inet_splice_eof, }; =20 static struct inet_protosw mptcp_protosw =3D { --=20 2.51.0 From nobody Sun Feb 8 05:08:24 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 866BC2C08CB for ; Mon, 2 Feb 2026 09:22:08 +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=1770024128; cv=none; b=GjYjAV9sgz6+s7Ydd3ufaaspdfnO2le6FnbswB4S342CxMW/zPULUVSzMn5XGUFxiYkyq8JXSy7Vftw0zjJgfEx2IgBczwXbXyvsBpKBDhYYbupXqvs7SbWcHrMCWcdXohsmbpwNh6eFRn92779u7J4BejVgo5R2vR9H3NZGCs0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770024128; c=relaxed/simple; bh=KC4MGsPWkiBp8BGG77e1H1vx/zbo96/a8rSkzeLjFX8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=abiNoxS9BoCib5VWtmzLFTKw1/RrCLWSXSenaFHgUQpGDEC9siGSymX3ir19zRvGlbj5gkEMe2y9lTM+X+Gl1+K0ihUsMZtUfbdhYJZ269XzmQTHLhWg1tpCKLgQoR3bMZrsNdWlyb1TtimHCkdAvTDvsdQdGrjDDxGrqgc0amQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rVdrSZYz; 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="rVdrSZYz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4BD01C116D0; Mon, 2 Feb 2026 09:22:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770024128; bh=KC4MGsPWkiBp8BGG77e1H1vx/zbo96/a8rSkzeLjFX8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rVdrSZYz7iZ9Jr7oX4TzxGpFG6S+xgZYLGZN14heLBiX2RaCXQ+9COvjR0EkrM/P/ 1Px2T3FeG8TzhjPawYTsH3LfZCpXeyP+Wr7CaRcsXsGLYUg5fvck+qYJLrmmvHtMCC OhCHlH/QIFrsRk8pkx6qDT41Hz1uSXTk/7ubPkSwGOwKGQBipJYb6OB+5rXcHCSnT7 WiJeq3iw77BiGs08sDQ8H9g+G/zegQE6aH1RwchFUf+6d0fRzwrblwK3sIjTl3etmN 0Jd3AGdYIXE3nAwmzsK01W53quvZjNTkLLdDKprEymoof0AIHCFxzFuAVlHcZJcVXX 4uHbFIY8PXd0w== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next 3/3] selftests: mptcp: connect: trigger splice_eof Date: Mon, 2 Feb 2026 17:21:51 +0800 Message-ID: <467dfcbcd3e11849c507db5360c3a394c3d117a5.1770023932.git.tanggeliang@kylinos.cn> X-Mailer: git-send-email 2.52.0 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 Increase the sendfile count by one to ensure the transmission size exceeds the actual data length. This triggers the splice_eof path in the kernel, allowing the newly implemented MPTCP splice_eof interface to be exercised during testing. The change from 'count' to 'count + 1' forces the sendfile operation to attempt sending one more byte than available, which activates the end-of-file handling in the splicing logic and ensures coverage of the related MPTCP code paths. Signed-off-by: Geliang Tang --- tools/testing/selftests/net/mptcp/mptcp_connect.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/test= ing/selftests/net/mptcp/mptcp_connect.c index cbe573c4ab3a..2aaf3ed11315 100644 --- a/tools/testing/selftests/net/mptcp/mptcp_connect.c +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c @@ -870,7 +870,7 @@ static int do_sendfile(int infd, int outfd, unsigned in= t count, while (count > 0) { ssize_t r; =20 - r =3D sendfile(outfd, infd, NULL, count); + r =3D sendfile(outfd, infd, NULL, count + 1); if (r < 0) { perror("sendfile"); return 3; --=20 2.51.0