From patchwork Tue Aug 8 13:40:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Breno Leitao X-Patchwork-Id: 13346915 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 5984DC41513 for ; Tue, 8 Aug 2023 19:46:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234081AbjHHTqU (ORCPT ); Tue, 8 Aug 2023 15:46:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52612 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236545AbjHHTp6 (ORCPT ); Tue, 8 Aug 2023 15:45:58 -0400 Received: from mail-lj1-f180.google.com (mail-lj1-f180.google.com [209.85.208.180]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B78116AFF; Tue, 8 Aug 2023 09:49:33 -0700 (PDT) Received: by mail-lj1-f180.google.com with SMTP id 38308e7fff4ca-2b9d3dacb33so95357021fa.1; Tue, 08 Aug 2023 09:49:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691513371; x=1692118171; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=o+9mxu8b+EhzS+5yoGnjlhzry4jkjQ5Q19ANuPNesrY=; b=l+J8ftwOUHMt2R84TGYZQ0G1AyQ5zfkFhgjdQq3p9CwjDoGfVT0ysWkD4m4cTgcsrz VnSiC+kxrEl2uMHN/bL/TWpw3x/mq6elkVx75+/P3kKsTIglIOftRjuzOuvoaACqXp5r ymAK9h6w30XQZ1yTTXBX14Rsgdaq0/Tnz3ManZ2HMz/vrr9bX9l3o4rk6dp7jIHxFxK0 81K3x0pf3DSIIlzuWGkGhAedjyFcksBQFrZWjqx6gZIEINC08DeLtTyLKyvCNAy6YSiQ Wy5ry/WBQUcvIamvkyq2r9r86dOB12CigvoxmhcZt1udmO7m48wgpDKTtKoZb+qTtnL/ OQ2w== X-Gm-Message-State: AOJu0YzXUznEAgznzLGg5rUubd3OEPwCcoK9CwyNaiwAWf5suWi4nRWW 836OXhYYY1oNvNd2OR8qzhldv0OOJBs= X-Google-Smtp-Source: AGHT+IFaiSD6la9EEN/hiA8ab/8s4dP7Ut5NjsQn3lAyBLxiI8Mq1SO2WnI7EtR5m+sRlgD67JjEaA== X-Received: by 2002:aa7:dc07:0:b0:522:37f1:5fd0 with SMTP id b7-20020aa7dc07000000b0052237f15fd0mr11327506edu.5.1691502066712; Tue, 08 Aug 2023 06:41:06 -0700 (PDT) Received: from localhost (fwdproxy-cln-018.fbsv.net. [2a03:2880:31ff:12::face:b00c]) by smtp.gmail.com with ESMTPSA id p8-20020a05640210c800b005231e1780aasm6116955edu.91.2023.08.08.06.41.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Aug 2023 06:41:06 -0700 (PDT) From: Breno Leitao To: sdf@google.com, axboe@kernel.dk, asml.silence@gmail.com, willemdebruijn.kernel@gmail.com Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, io-uring@vger.kernel.org, kuba@kernel.org, pabeni@redhat.com Subject: [PATCH v2 3/8] io_uring/cmd: Introduce SOCKET_URING_OP_SETSOCKOPT Date: Tue, 8 Aug 2023 06:40:43 -0700 Message-Id: <20230808134049.1407498-4-leitao@debian.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230808134049.1407498-1-leitao@debian.org> References: <20230808134049.1407498-1-leitao@debian.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Add initial support for SOCKET_URING_OP_SETSOCKOPT. This new command is similar to setsockopt. This initial implementation just cares about SOL_SOCKET level for now. The next patch implements the generic case. Function io_uring_cmd_setsockopt() is inspired by the function __sys_setsockopt(). Important to say that userspace needs to keep the pointer's memory alive until the operation is completed. Signed-off-by: Breno Leitao --- include/uapi/linux/io_uring.h | 1 + io_uring/uring_cmd.c | 23 +++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 8152151080db..3fe82df06abf 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -736,6 +736,7 @@ enum { SOCKET_URING_OP_SIOCINQ = 0, SOCKET_URING_OP_SIOCOUTQ, SOCKET_URING_OP_GETSOCKOPT, + SOCKET_URING_OP_SETSOCKOPT, }; #ifdef __cplusplus diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c index 582931879482..5404b788ca14 100644 --- a/io_uring/uring_cmd.c +++ b/io_uring/uring_cmd.c @@ -192,6 +192,27 @@ static inline int io_uring_cmd_getsockopt(struct socket *sock, return -EOPNOTSUPP; } +static inline int io_uring_cmd_setsockopt(struct socket *sock, + struct io_uring_cmd *cmd) +{ + void __user *optval = u64_to_user_ptr(READ_ONCE(cmd->sqe->optval)); + int optname = READ_ONCE(cmd->sqe->optname); + int optlen = READ_ONCE(cmd->sqe->optlen); + int level = READ_ONCE(cmd->sqe->level); + int err; + + err = security_socket_setsockopt(sock, level, optname); + if (err) + return err; + + err = -EOPNOTSUPP; + if (level == SOL_SOCKET && !sock_use_custom_sol_socket(sock)) + err = sock_setsockopt(sock, level, optname, + USER_SOCKPTR(optval), optlen); + + return err; +} + int io_uring_cmd_sock(struct io_uring_cmd *cmd, unsigned int issue_flags) { struct socket *sock = cmd->file->private_data; @@ -215,6 +236,8 @@ int io_uring_cmd_sock(struct io_uring_cmd *cmd, unsigned int issue_flags) return arg; case SOCKET_URING_OP_GETSOCKOPT: return io_uring_cmd_getsockopt(sock, cmd); + case SOCKET_URING_OP_SETSOCKOPT: + return io_uring_cmd_setsockopt(sock, cmd); default: return -EOPNOTSUPP; }