io_uring: add support for IORING_OP_OPENAT

This works just like openat(2), except it can be performed async. For the normal case of a non-blocking path lookup this will complete inline. If we have to do IO to perform the open, it'll be done from async context.

Jens Axboe committed 6 years ago

Commit 15b71ab1 parent 35cb6d52 files · +95 −2Browse files

Showing the changes to include/uapi/linux (1 of 2 files). Show all

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include/uapi/linux/io_uring.h+2−0

@@ -34,6 +34,7 @@ struct io_uring_sqe { · 33 unmodified lines
34	34	__u32 timeout_flags;
35	35	__u32 accept_flags;
36	36	__u32 cancel_flags;
	37	+ __u32 open_flags;
37	38	};
38	39	__u64 user_data; /* data to be passed back at completion time */
39	40	union {
@@ -77,6 +78,7 @@ enum { · 37 unmodified lines
77	78	IORING_OP_LINK_TIMEOUT,
78	79	IORING_OP_CONNECT,
79	80	IORING_OP_FALLOCATE,
	81	+ IORING_OP_OPENAT,
80	82
81	83	/* this goes last, obviously */
82	84	IORING_OP_LAST,