From 0fa03c624d8fc9932d0f27c39a9deca6a37e0e17 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Fri, 19 Apr 2019 13:34:07 -0600 Subject: io_uring: add support for sendmsg() This is done through IORING_OP_SENDMSG. There's a new sqe->msg_flags for the flags argument, and the msghdr struct is passed in the sqe->addr field. We use MSG_DONTWAIT to force an inline fast path if sendmsg() doesn't block, and punt to async execution if it would have. Acked-by: David S. Miller Signed-off-by: Jens Axboe --- include/linux/socket.h | 4 ++++ include/uapi/linux/io_uring.h | 2 ++ 2 files changed, 6 insertions(+) (limited to 'include') diff --git a/include/linux/socket.h b/include/linux/socket.h index b57cd8bf96e2..9d770ef3ced5 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -12,6 +12,7 @@ struct pid; struct cred; +struct socket; #define __sockaddr_check_size(size) \ BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage))) @@ -374,6 +375,9 @@ extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, bool forbid_cmsg_compat); +extern long __sys_sendmsg_sock(struct socket *sock, + struct user_msghdr __user *msg, + unsigned int flags); /* helpers which do the actual work for syscalls */ extern int __sys_recvfrom(int fd, void __user *ubuf, size_t size, diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 10b7c45f6d57..d74742d6269f 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -27,6 +27,7 @@ struct io_uring_sqe { __u32 fsync_flags; __u16 poll_events; __u32 sync_range_flags; + __u32 msg_flags; }; __u64 user_data; /* data to be passed back at completion time */ union { @@ -58,6 +59,7 @@ struct io_uring_sqe { #define IORING_OP_POLL_ADD 6 #define IORING_OP_POLL_REMOVE 7 #define IORING_OP_SYNC_FILE_RANGE 8 +#define IORING_OP_SENDMSG 9 /* * sqe->fsync_flags -- cgit v1.2.3