From 53db8a71ecb42c2ec5e9c6925269a750255f9af5 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Fri, 4 Apr 2025 14:50:59 -0600 Subject: io_uring: add support for IORING_OP_PIPE This works just like pipe2(2), except it also supports fixed file descriptors. Used in a similar fashion as for other fd instantiating opcodes (like accept, socket, open, etc), where sqe->file_slot is set appropriately if two direct descriptors are desired rather than a set of normal file descriptors. sqe->addr must be set to a pointer to an array of 2 integers, which is where the fixed/normal file descriptors are copied to. sqe->pipe_flags contains flags, same as what is allowed for pipe2(2). Future expansion of per-op private flags can go in sqe->ioprio, like we do for other opcodes that take both a "syscall" flag set and an io_uring opcode specific flag set. Signed-off-by: Jens Axboe --- include/uapi/linux/io_uring.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 8f1fc12bac46..130f3bc71a69 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -73,6 +73,7 @@ struct io_uring_sqe { __u32 futex_flags; __u32 install_fd_flags; __u32 nop_flags; + __u32 pipe_flags; }; __u64 user_data; /* data to be passed back at completion time */ /* pack this to avoid bogus arm OABI complaints */ @@ -283,6 +284,7 @@ enum io_uring_op { IORING_OP_EPOLL_WAIT, IORING_OP_READV_FIXED, IORING_OP_WRITEV_FIXED, + IORING_OP_PIPE, /* this goes last, obviously */ IORING_OP_LAST, -- cgit v1.2.3