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[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> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@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; }