linux - io_uring/rw.h

53 lines · 1.8 KiB

1	// SPDX-License-Identifier: GPL-2.0
2
3	#include <linux/io_uring_types.h>
4	#include <linux/pagemap.h>
5	#include <linux/uio.h>
6
7	struct io_meta_state {
8	u32 seed;
9	struct iov_iter_state iter_meta;
10	};
11
12	struct io_async_rw {
13	struct iou_vec vec;
14	size_t bytes_done;
15
16	struct_group(clear,
17	struct iov_iter iter;
18	struct iov_iter_state iter_state;
19	struct iovec fast_iov;
20	unsigned buf_group;
21
22	/*
23	* wpq is for buffered io, while meta fields are used with
24	* direct io
25	*/
26	union {
27	struct wait_page_queue wpq;
28	struct {
29	struct uio_meta meta;
30	struct io_meta_state meta_state;
31	};
32	};
33	);
34	};
35
36	int io_prep_read_fixed(struct io_kiocb req, const struct io_uring_sqe sqe);
37	int io_prep_write_fixed(struct io_kiocb req, const struct io_uring_sqe sqe);
38	int io_prep_readv_fixed(struct io_kiocb req, const struct io_uring_sqe sqe);
39	int io_prep_writev_fixed(struct io_kiocb req, const struct io_uring_sqe sqe);
40	int io_prep_readv(struct io_kiocb req, const struct io_uring_sqe sqe);
41	int io_prep_writev(struct io_kiocb req, const struct io_uring_sqe sqe);
42	int io_prep_read(struct io_kiocb req, const struct io_uring_sqe sqe);
43	int io_prep_write(struct io_kiocb req, const struct io_uring_sqe sqe);
44	int io_read(struct io_kiocb *req, unsigned int issue_flags);
45	int io_write(struct io_kiocb *req, unsigned int issue_flags);
46	int io_read_fixed(struct io_kiocb *req, unsigned int issue_flags);
47	int io_write_fixed(struct io_kiocb *req, unsigned int issue_flags);
48	void io_readv_writev_cleanup(struct io_kiocb *req);
49	void io_rw_fail(struct io_kiocb *req);
50	void io_req_rw_complete(struct io_tw_req tw_req, io_tw_token_t tw);
51	int io_read_mshot_prep(struct io_kiocb req, const struct io_uring_sqe sqe);
52	int io_read_mshot(struct io_kiocb *req, unsigned int issue_flags);
53	void io_rw_cache_free(const void *entry);