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[2a03:2880:31ff:10::face:b00c]) by smtp.gmail.com with ESMTPSA id z10-20020a05600c114a00b003f7e60622f0sm17180504wmz.6.2023.06.14.04.10.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Jun 2023 04:10:24 -0700 (PDT) From: Breno Leitao To: io-uring@vger.kernel.org, axboe@kernel.dk, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, David Ahern Cc: leit@fb.com, asml.silence@gmail.com, matthieu.baerts@tessares.net, martineau@kernel.org, marcelo.leitner@gmail.com, lucien.xin@gmail.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dccp@vger.kernel.org, mptcp@lists.linux.dev, linux-sctp@vger.kernel.org, ast@kernel.org, kuniyu@amazon.com, martin.lau@kernel.org Subject: [RFC PATCH v2 3/4] net: add uring_cmd callback to TCP Date: Wed, 14 Jun 2023 04:07:56 -0700 Message-Id: <20230614110757.3689731-4-leitao@debian.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230614110757.3689731-1-leitao@debian.org> References: <20230614110757.3689731-1-leitao@debian.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This is the implementation of uring_cmd for the TCP protocol. It basically encompasses SOCKET_URING_OP_SIOCOUTQ and SOCKET_URING_OP_SIOCINQ, which calls tcp_ioctl(). tcp_ioctl() has other CMDs, such as SIOCATMARK and SIOCOUTQNSD, but they are not implemented, because they are TCP specific, and not available on UDP and RAW sockets. Signed-off-by: Breno Leitao --- include/net/tcp.h | 2 ++ net/ipv4/tcp.c | 21 +++++++++++++++++++++ net/ipv4/tcp_ipv4.c | 1 + 3 files changed, 24 insertions(+) diff --git a/include/net/tcp.h b/include/net/tcp.h index 2a7289916d42..1100b0c9df98 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -340,6 +340,8 @@ void tcp_wfree(struct sk_buff *skb); void tcp_write_timer_handler(struct sock *sk); void tcp_delack_timer_handler(struct sock *sk); int tcp_ioctl(struct sock *sk, int cmd, int *karg); +int tcp_uring_cmd(struct sock *sk, struct io_uring_cmd *cmd, + unsigned int issue_flags); int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb); void tcp_rcv_established(struct sock *sk, struct sk_buff *skb); void tcp_rcv_space_adjust(struct sock *sk); diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 2cb01880755a..8bf9a41d2a67 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -279,6 +279,7 @@ #include #include #include +#include /* Track pending CMSGs. */ enum { @@ -599,6 +600,26 @@ __poll_t tcp_poll(struct file *file, struct socket *sock, poll_table *wait) } EXPORT_SYMBOL(tcp_poll); +int tcp_uring_cmd(struct sock *sk, struct io_uring_cmd *cmd, + unsigned int issue_flags) +{ + int ret; + + switch (cmd->sqe->cmd_op) { + case SOCKET_URING_OP_SIOCINQ: + if (tcp_ioctl(sk, SIOCINQ, &ret)) + return -EFAULT; + return ret; + case SOCKET_URING_OP_SIOCOUTQ: + if (tcp_ioctl(sk, SIOCOUTQ, &ret)) + return -EFAULT; + return ret; + default: + return -ENOIOCTLCMD; + } +} +EXPORT_SYMBOL_GPL(tcp_uring_cmd); + int tcp_ioctl(struct sock *sk, int cmd, int *karg) { struct tcp_sock *tp = tcp_sk(sk); diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 84a5d557dc1a..dd93a862d195 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -3107,6 +3107,7 @@ struct proto tcp_prot = { .disconnect = tcp_disconnect, .accept = inet_csk_accept, .ioctl = tcp_ioctl, + .uring_cmd = tcp_uring_cmd, .init = tcp_v4_init_sock, .destroy = tcp_v4_destroy_sock, .shutdown = tcp_shutdown, -- 2.34.1