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[2a03:2880:31ff:77::face:b00c]) by smtp.gmail.com with ESMTPSA id f15-20020a5d4dcf000000b0030ae53550f5sm5532419wru.51.2023.06.21.16.21.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Jun 2023 16:21:53 -0700 (PDT) From: Breno Leitao To: Jonathan Corbet , Jens Axboe , Pavel Begunkov , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: leit@meta.com, Arnd Bergmann , Greg Kroah-Hartman , Steve French , Lu Baolu , Jiri Slaby , Stephen Hemminger , Jason Gunthorpe , Simon Ser , linux-doc@vger.kernel.org (open list:DOCUMENTATION), linux-kernel@vger.kernel.org (open list), io-uring@vger.kernel.org (open list:IO_URING), netdev@vger.kernel.org (open list:NETWORKING [GENERAL]) Subject: [PATCH] io_uring: Add io_uring command support for sockets Date: Wed, 21 Jun 2023 16:21:26 -0700 Message-Id: <20230621232129.3776944-1-leitao@debian.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Enable io_uring commands on network sockets. Create two new SOCKET_URING_OP commands that will operate on sockets. Since these commands are similar to ioctl, uses the _IO{R,W} helpers to embedded the argument size and operation direction. Also allocates a unused ioctl chunk for uring command usage. In order to call ioctl on sockets, use the file_operations->uring_cmd callbacks, and map it to a uring socket function, which handles the SOCKET_URING_OP accordingly, and calls socket ioctls. This patches was tested by creating a new test case in liburing. Link: https://github.com/leitao/liburing/commit/3340908b742c6a26f662a0679c4ddf9df84ef431 Signed-off-by: Breno Leitao --- .../userspace-api/ioctl/ioctl-number.rst | 1 + include/linux/io_uring.h | 6 +++++ include/uapi/linux/io_uring.h | 6 +++++ io_uring/uring_cmd.c | 27 +++++++++++++++++++ net/socket.c | 2 ++ 5 files changed, 42 insertions(+) diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst index 4f7b23faebb9..23348636f2ef 100644 --- a/Documentation/userspace-api/ioctl/ioctl-number.rst +++ b/Documentation/userspace-api/ioctl/ioctl-number.rst @@ -361,6 +361,7 @@ Code Seq# Include File Comments 0xCB 00-1F CBM serial IEC bus in development: 0xCC 00-0F drivers/misc/ibmvmc.h pseries VMC driver +0xCC A0-BF uapi/linux/io_uring.h io_uring cmd subsystem 0xCD 01 linux/reiserfs_fs.h 0xCE 01-02 uapi/linux/cxl_mem.h Compute Express Link Memory Devices 0xCF 02 fs/smb/client/cifs_ioctl.h diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h index 7fe31b2cd02f..d1b20e2a9fb0 100644 --- a/include/linux/io_uring.h +++ b/include/linux/io_uring.h @@ -71,6 +71,7 @@ static inline void io_uring_free(struct task_struct *tsk) if (tsk->io_uring) __io_uring_free(tsk); } +int uring_sock_cmd(struct io_uring_cmd *cmd, unsigned int issue_flags); #else static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, struct iov_iter *iter, void *ioucmd) @@ -102,6 +103,11 @@ static inline const char *io_uring_get_opcode(u8 opcode) { return ""; } +static inline int uring_sock_cmd(struct io_uring_cmd *cmd, + unsigned int issue_flags) +{ + return -EOPNOTSUPP; +} #endif #endif diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 0716cb17e436..e20ba410859d 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -703,6 +703,12 @@ struct io_uring_recvmsg_out { __u32 flags; }; +/* + * Argument for IORING_OP_URING_CMD when file is a socket + */ +#define SOCKET_URING_OP_SIOCINQ _IOR(0xcc, 0xa0, int) +#define SOCKET_URING_OP_SIOCOUTQ _IOR(0xcc, 0xa1, int) + #ifdef __cplusplus } #endif diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c index 5e32db48696d..dcbe6493b03f 100644 --- a/io_uring/uring_cmd.c +++ b/io_uring/uring_cmd.c @@ -7,6 +7,7 @@ #include #include +#include #include "io_uring.h" #include "rsrc.h" @@ -156,3 +157,29 @@ int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, return io_import_fixed(rw, iter, req->imu, ubuf, len); } EXPORT_SYMBOL_GPL(io_uring_cmd_import_fixed); + +int uring_sock_cmd(struct io_uring_cmd *cmd, unsigned int issue_flags) +{ + struct socket *sock = cmd->file->private_data; + struct sock *sk = sock->sk; + int ret, arg = 0; + + if (!sk->sk_prot || !sk->sk_prot->ioctl) + return -EOPNOTSUPP; + + switch (cmd->sqe->cmd_op) { + case SOCKET_URING_OP_SIOCINQ: + ret = sk->sk_prot->ioctl(sk, SIOCINQ, &arg); + if (ret) + return ret; + return arg; + case SOCKET_URING_OP_SIOCOUTQ: + ret = sk->sk_prot->ioctl(sk, SIOCOUTQ, &arg); + if (ret) + return ret; + return arg; + default: + return -EOPNOTSUPP; + } +} +EXPORT_SYMBOL_GPL(uring_sock_cmd); diff --git a/net/socket.c b/net/socket.c index b778fc03c6e0..db11e94d2259 100644 --- a/net/socket.c +++ b/net/socket.c @@ -88,6 +88,7 @@ #include #include #include +#include #include #include @@ -159,6 +160,7 @@ static const struct file_operations socket_file_ops = { #ifdef CONFIG_COMPAT .compat_ioctl = compat_sock_ioctl, #endif + .uring_cmd = uring_sock_cmd, .mmap = sock_mmap, .release = sock_close, .fasync = sock_fasync, -- 2.34.1