From mboxrd@z Thu Jan 1 00:00:00 1970 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 BEC4CDDC5 for ; Sat, 6 Dec 2025 12:34:26 +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=1765024466; cv=none; b=s8ME881EGT98EU9LsrTlJjd/CH+bxYKV8BKoZeqvQm1E6879nEIwA6BPG9KYr320OjYXqn9uw8DXjrIaxxQeAqSzJ2sPni4DPI6NDYYdQCDInmpS8LVcCl7Jr3x8Y/klyBM+1arMS1dEmlBcmeyDpEuOOiAJxz+845Yei4Rn6Gw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765024466; c=relaxed/simple; bh=CQMpx30JAGBU0HF/RUnhDtdtDfroZxx0GmdVv/mGvVw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=XirnYJowSRtPi20X3wo5sZrt5D99oWKPPk/TQ2NTPzhrMz0X0OCRlzz+BsneLLZNo5DakVwo6WiuEwm3hlbg7fnbxBcxNCl27Va2oaScEDyHphuhnpK5SyG3K2ZKx0Z49LtAaRIgBZ68SyhjJz9nPC0q3j5PBIB7DKnrqOVc7oI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rmNGTTnx; 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="rmNGTTnx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CBDAEC4CEF5; Sat, 6 Dec 2025 12:34:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765024466; bh=CQMpx30JAGBU0HF/RUnhDtdtDfroZxx0GmdVv/mGvVw=; h=From:To:Cc:Subject:Date:From; b=rmNGTTnxTRimvq0X5AjZz0HElFs5q3GIpcqRAW/F67RAn8U3MjJM1hwxE+vtoic2G OsR2H4nOBsxSzdzvs9THkd4RhSkrA46f6eWMYPQQE3Z0klp9SPy1U24pF1wvATFmpD ZyY6qQhmGDeYKYftfV7nPLSWPP2jSEqc+GESROHlMc+qJYWPqGXOJ2jiiO1ePTqYs5 OLu3pwW3pAkuoJC9MmpO2zg18He7bpqOexSSgYdUmMH17+FWz93kU6PeoQvPUAIMm6 yjkJgrQGC36ebf4DbfxN0Y4t8G6taEYhTAnep31sG4TfDGHeD4PtXWYQdsQxVbnSII bYYjtqG7RUWsw== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v15 0/6] implement mptcp read_sock Date: Sat, 6 Dec 2025 20:33:50 +0800 Message-ID: X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Geliang Tang v15: - Patch 2, remove the maximum length limit as Mat suggested. - Move tcp_recv_should_stop() helper out of the series as Mat suggested. v14: - Patch 2, new helper __mptcp_read_sock() with noack parameter, this makes it more similar to __tcp_read_sock() and also prepares for the use of mptcp_read_sock_noack() in MPTCP KTLS support. Also invoke msk_owned_by_me() in it to make sure socket was locked. - Patch 5, export tcp_splice_data_recv() as Paolo suggested in v7. - Patch 6, drop mptcp_splice_data_recv(). - Link: https://patchwork.kernel.org/project/mptcp/cover/cover.1763974740.git.tanggeliang@kylinos.cn/ v13: - rebase on "mptcp: introduce backlog processing" v6 - Link: https://patchwork.kernel.org/project/mptcp/cover/cover.1761198660.git.geliang@kernel.org/ v12: - rebase on "mptcp: receive path improvement" 1-7. - some cleanups. v11: - drop "tcp: drop release and lock again in splice_read", and add this release and lock again in mptcp_splice_read too. (Thanks Mat, I didn't understand the intent of this code before.) - call mptcp_rps_record_subflows() in mptcp_splice_read as Mat suggested. v10: - add an offset parameter for mptcp_recv_skb and make it more like tcp_recv_skb. - Link: https://patchwork.kernel.org/project/mptcp/cover/cover.1756780274.git.tanggeliang@kylinos.cn/ v9: - merge the squash-to patches. - a new patch "drop release and lock again in splice_read". - Link: https://patchwork.kernel.org/project/mptcp/cover/cover.1752399660.git.tanggeliang@kylinos.cn/ v8: - export struct tcp_splice_state and tcp_splice_data_recv() in net/tcp.h. - add a new helper mptcp_recv_should_stop. - add mptcp_connect_splice.sh. - update commit logs. v7: - only patch 1 and patch 2 changed. - add a new helper mptcp_eat_recv_skb. - invoke skb_peek in mptcp_recv_skb(). - use while ((skb = mptcp_recv_skb(sk)) != NULL) instead of skb_queue_walk_safe(&sk->sk_receive_queue, skb, tmp). v6: - address Paolo's comments for v4, v5 (thanks) v5: - extract the common code of __mptcp_recvmsg_mskq() and mptcp_read_sock() into a new helper __mptcp_recvmsg_desc() to reduce duplication code. v4: - v3 doesn't work for MPTCP fallback tests in mptcp_connect.sh, this set fix it. - invoke __mptcp_move_skbs in mptcp_read_sock. - use INDIRECT_CALL_INET_1 in __tcp_splice_read. v3: - merge the two squash-to patches. - use sk->sk_rcvbuf instead of INT_MAX as the max len in mptcp_read_sock(). - add splice io mode for mptcp_connect and drop mptcp_splice.c test. - the splice test for packetdrill is also added here: https://github.com/multipath-tcp/packetdrill/pull/162 v2: - set splice_read of mptcp - add a splice selftest. I have good news! I recently added MPTCP support to "NVME over TCP". And my RFC patches are under review by NVME maintainer Hannes. Replacing "NVME over TCP" with MPTCP is very simple. I used IPPROTO_MPTCP instead of IPPROTO_TCP to create MPTCP sockets on both target and host sides, these sockets are created in Kernel space. nvmet_tcp_add_port: ret = sock_create(port->addr.ss_family, SOCK_STREAM, IPPROTO_MPTCP, &port->sock); nvme_tcp_alloc_queue: ret = sock_create_kern(current->nsproxy->net_ns, ctrl->addr.ss_family, SOCK_STREAM, IPPROTO_MPTCP, &queue->sock); nvme_tcp_try_recv() needs to call .read_sock interface of struct proto_ops, but it is not implemented in MPTCP. So I implemented it with reference to __mptcp_recvmsg_mskq(). Since the NVME part patches are still under reviewing, I only send the MPTCP part patches in this set to MPTCP ML for your opinions. Geliang Tang (6): mptcp: add eat_recv_skb helper mptcp: implement .read_sock tcp: export tcp_splice_state mptcp: implement .splice_read selftests: mptcp: add splice io mode selftests: mptcp: connect: cover splice mode include/net/tcp.h | 11 + net/ipv4/tcp.c | 13 +- net/mptcp/protocol.c | 215 +++++++++++++++++- tools/testing/selftests/net/mptcp/Makefile | 1 + .../selftests/net/mptcp/mptcp_connect.c | 63 ++++- .../net/mptcp/mptcp_connect_splice.sh | 5 + 6 files changed, 289 insertions(+), 19 deletions(-) create mode 100755 tools/testing/selftests/net/mptcp/mptcp_connect_splice.sh -- 2.51.0