From patchwork Mon Sep 4 16:24:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Breno Leitao X-Patchwork-Id: 13374196 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 C15A2CA0FF3 for ; Mon, 4 Sep 2023 16:25:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241348AbjIDQZ3 (ORCPT ); Mon, 4 Sep 2023 12:25:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240384AbjIDQZ3 (ORCPT ); Mon, 4 Sep 2023 12:25:29 -0400 Received: from mail-ed1-f53.google.com (mail-ed1-f53.google.com [209.85.208.53]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AF2809D; Mon, 4 Sep 2023 09:25:25 -0700 (PDT) Received: by mail-ed1-f53.google.com with SMTP id 4fb4d7f45d1cf-52713d2c606so2198624a12.2; Mon, 04 Sep 2023 09:25:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693844724; x=1694449524; 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=PBda6rT0pL/B59nG5AgliJCLsy8+kPWSe+s29wcarWY=; b=BDajSyoHg1pnz7M7ag0XKpV0LkJPVrcUIIhZndCm2em5LDAQDiRJcB2jKZaBfpE7QK F1RVMy4ifhzk6MIbQ2W6SaVpJEFXjobkcZqLSmJ8fv7CXBsvWSo2tPILzbBZttKTNGvA 1wjN95OZpMr72384lnisUvU+/USaM4fZa5RlqatcgLXrgm0j/wZzbvYmJzvR9niWy9tJ 8xPyinC5Esx/BdR9p8k/sAurdjn3ISAsltHN7G7AP/REU9k9DbYcU3Y8WSoFIzebGSBS ViDraF3jTL/Y5A2gpHtLV5ZfmH2MnpGV6stDPB9H/EwUFkNiYV0huLaxpnuo38TBDGvz Qj4Q== X-Gm-Message-State: AOJu0YwjB/92yKlZLI3K9TLz93uqG3TqQRHud/uI7JgKA2cVx5mrXmit RLTWU4rJlcopBe1ksb54/ac= X-Google-Smtp-Source: AGHT+IHZKR+9DvETpBcmV6dj1OZh+YayfA1YpM9KTsLZ6mqWKVA1d3MF8/OaJ9OgfHCIheZcXhOCEQ== X-Received: by 2002:a17:907:78c1:b0:9a1:c991:a51c with SMTP id kv1-20020a17090778c100b009a1c991a51cmr7528046ejc.2.1693844724180; Mon, 04 Sep 2023 09:25:24 -0700 (PDT) Received: from localhost (fwdproxy-cln-118.fbsv.net. [2a03:2880:31ff:76::face:b00c]) by smtp.gmail.com with ESMTPSA id m26-20020a170906259a00b0099ca4f61a8bsm6406935ejb.92.2023.09.04.09.25.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Sep 2023 09:25:23 -0700 (PDT) From: Breno Leitao To: sdf@google.com, axboe@kernel.dk, asml.silence@gmail.com, willemdebruijn.kernel@gmail.com, martin.lau@linux.dev, krisman@suse.de, "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, io-uring@vger.kernel.org, Willem de Bruijn Subject: [PATCH v4 03/10] net/socket: Break down __sys_setsockopt Date: Mon, 4 Sep 2023 09:24:56 -0700 Message-Id: <20230904162504.1356068-4-leitao@debian.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230904162504.1356068-1-leitao@debian.org> References: <20230904162504.1356068-1-leitao@debian.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Split __sys_setsockopt() into two functions by removing the core logic into a sub-function (do_sock_setsockopt()). This will avoid code duplication when doing the same operation in other callers, for instance. do_sock_setsockopt() will be called by io_uring setsockopt() command operation in the following patch. Signed-off-by: Breno Leitao Reviewed-by: Willem de Bruijn --- include/net/sock.h | 2 ++ net/socket.c | 39 +++++++++++++++++++++++++-------------- 2 files changed, 27 insertions(+), 14 deletions(-) diff --git a/include/net/sock.h b/include/net/sock.h index 11d503417591..b059f9272303 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1861,6 +1861,8 @@ int sk_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval, unsigned int optlen); int sock_setsockopt(struct socket *sock, int level, int op, sockptr_t optval, unsigned int optlen); +int do_sock_setsockopt(struct socket *sock, bool compat, int level, + int optname, sockptr_t optval, int optlen); int sk_getsockopt(struct sock *sk, int level, int optname, sockptr_t optval, sockptr_t optlen); diff --git a/net/socket.c b/net/socket.c index 9ec9a8a07c0e..3bf29a27653f 100644 --- a/net/socket.c +++ b/net/socket.c @@ -2261,31 +2261,21 @@ static bool sock_use_custom_sol_socket(const struct socket *sock) return test_bit(SOCK_CUSTOM_SOCKOPT, &sock->flags); } -/* - * Set a socket option. Because we don't know the option lengths we have - * to pass the user mode parameter for the protocols to sort out. - */ -int __sys_setsockopt(int fd, int level, int optname, char __user *user_optval, - int optlen) +int do_sock_setsockopt(struct socket *sock, bool compat, int level, + int optname, sockptr_t optval, int optlen) { - sockptr_t optval = USER_SOCKPTR(user_optval); const struct proto_ops *ops; char *kernel_optval = NULL; - int err, fput_needed; - struct socket *sock; + int err; if (optlen < 0) return -EINVAL; - sock = sockfd_lookup_light(fd, &err, &fput_needed); - if (!sock) - return err; - err = security_socket_setsockopt(sock, level, optname); if (err) goto out_put; - if (!in_compat_syscall()) + if (!compat) err = BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock->sk, &level, &optname, optval, &optlen, &kernel_optval); @@ -2308,6 +2298,27 @@ int __sys_setsockopt(int fd, int level, int optname, char __user *user_optval, optlen); kfree(kernel_optval); out_put: + return err; +} +EXPORT_SYMBOL(do_sock_setsockopt); + +/* Set a socket option. Because we don't know the option lengths we have + * to pass the user mode parameter for the protocols to sort out. + */ +int __sys_setsockopt(int fd, int level, int optname, char __user *user_optval, + int optlen) +{ + sockptr_t optval = USER_SOCKPTR(user_optval); + bool compat = in_compat_syscall(); + int err, fput_needed; + struct socket *sock; + + sock = sockfd_lookup_light(fd, &err, &fput_needed); + if (!sock) + return err; + + err = do_sock_setsockopt(sock, compat, level, optname, optval, optlen); + fput_light(sock->file, fput_needed); return err; }