From patchwork Mon Jul 24 14:22:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Breno Leitao X-Patchwork-Id: 13324863 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CDF68C001DF for ; Mon, 24 Jul 2023 14:23:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231821AbjGXOX6 (ORCPT ); Mon, 24 Jul 2023 10:23:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230166AbjGXOX6 (ORCPT ); Mon, 24 Jul 2023 10:23:58 -0400 Received: from mail-ej1-f52.google.com (mail-ej1-f52.google.com [209.85.218.52]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A22C1E76; Mon, 24 Jul 2023 07:23:51 -0700 (PDT) Received: by mail-ej1-f52.google.com with SMTP id a640c23a62f3a-991f956fb5aso661601966b.0; Mon, 24 Jul 2023 07:23:51 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690208630; x=1690813430; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=x34eE6rssNnP3AKTFSt9LRtCqJGRKZEC5FfRHT31dv0=; b=KaHj/Pc3xgBNQq6L81rSrkes0Kp9gh5PiJ3Vf5N71oAhGKq7bIlbboWgIcEGg8CC41 SBQjbbmCK2kMwrYcD91L+TWhRGpcV5pluEJ+1CsOW/FuBwG3txVzHsyGXMYuIQ0ms9TC nIupL5Bjc2U/E7iPArkic3JNJd4xh+Bl/buF2qFatfxrFOiSNOofY9W+1On+M8cVxaA+ OCvuXK50ul4Xv3N0vc8oAb0Ox003iBg4XA17Z77Mk7MKRpE3Y73Ifw9id4wdm0KImGY8 3ZIEpfgeaVcvpM3rzk8IpBSJWPLuvEonOAWc0M4J6GQtBqx4T+KDnggAjkNf9IPUQyAX ReLg== X-Gm-Message-State: ABy/qLYYiRaxqCL5Nly74QiZUlDo5T37KGE72aextpfi/zaKsksK33eQ 6h3dkriPvnXuBXvYOBHGs9cr8EahJfw= X-Google-Smtp-Source: APBJJlECpMG0omCqFKhxt3meieCf6TsZ7tjLOEIdTnOWJ+HMO7Q6H2neBAUDGWlSN25k+t2wYxf9sA== X-Received: by 2002:a17:907:7819:b0:99b:4790:a4d4 with SMTP id la25-20020a170907781900b0099b4790a4d4mr10050814ejc.38.1690208629659; Mon, 24 Jul 2023 07:23:49 -0700 (PDT) Received: from localhost (fwdproxy-cln-007.fbsv.net. [2a03:2880:31ff:7::face:b00c]) by smtp.gmail.com with ESMTPSA id qx26-20020a170906fcda00b00982cfe1fe5dsm6835841ejb.65.2023.07.24.07.23.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Jul 2023 07:23:49 -0700 (PDT) From: Breno Leitao To: asml.silence@gmail.com, axboe@kernel.dk Cc: io-uring@vger.kernel.org, netdev@vger.kernel.org, davem@davemloft.net, kuba@kernel.org, edumazet@google.com, pabeni@redhat.com, linux-kernel@vger.kernel.org, leit@meta.com Subject: [PATCH 0/3] io_uring: Initial support for {s,g}etsockopt commands Date: Mon, 24 Jul 2023 07:22:33 -0700 Message-Id: <20230724142237.358769-1-leitao@debian.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This patchset adds support for getsockopt (SOCKET_URING_OP_GETSOCKOPT) and setsockopt (SOCKET_URING_OP_SETSOCKOPT) in io_uring commands. SOCKET_URING_OP_SETSOCKOPT implements generic case, covering all levels and optnames. On the other hand, SOCKET_URING_OP_GETSOCKOPT just implements level SOL_SOCKET case, which seems to be the most common level parameter for get/setsockopt(2). struct proto_ops->setsockopt() uses sockptr instead of userspace pointers, which makes it easy to bind to io_uring. Unfortunately proto_ops->getsockopt() callback uses userspace pointers, except for SOL_SOCKET, which is handled by sk_getsockopt(). Thus, this patchset leverages sk_getsockopt() to implement the SOCKET_URING_OP_GETSOCKOPT case. PS1: For getsockopt command, the optlen field is not a userspace pointers, but an absolute value, so this is slightly different from getsockopt(2) behaviour. The new optlen value is returned in cqe->res. PS2: The userspace pointers need to be alive until the operation is completed. This patch was tested with a new test[1] in liburing. This patch depends on "io_uring: Add io_uring command support for sockets"[2] [1] Link: https://github.com/leitao/liburing/blob/getsock/test/socket-getsetsock-cmd.c [2] Link: https://lore.kernel.org/all/20230627134424.2784797-1-leitao@debian.org/ Changes from RFC: * Copy user memory at io_uring subsystem, and call proto_ops callbacks using kernel memory * Implement all the cases for SOCKET_URING_OP_SETSOCKOPT Breno Leitao (4): net: expose sock_use_custom_sol_socket io_uring/cmd: Introduce SOCKET_URING_OP_GETSOCKOPT io_uring/cmd: Introduce SOCKET_URING_OP_SETSOCKOPT io_uring/cmd: Extend support beyond SOL_SOCKET include/linux/net.h | 5 +++ include/uapi/linux/io_uring.h | 8 ++++ io_uring/uring_cmd.c | 81 +++++++++++++++++++++++++++++++++++ net/socket.c | 5 --- 4 files changed, 94 insertions(+), 5 deletions(-)