1/*
2 * Declarations for AIO in the raw protocol
3 *
4 * Copyright IBM, Corp. 2008
5 *
6 * Authors:
7 * Anthony Liguori <aliguori@us.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 *
12 * Contributions after 2012-01-13 are licensed under the terms of the
13 * GNU GPL, version 2 or (at your option) any later version.
14 */
15
16#ifndef QEMU_RAW_AIO_H
17#define QEMU_RAW_AIO_H
18
19#include "block/aio.h"
20#include "qemu/coroutine.h"
21#include "qemu/iov.h"
22
23/* AIO request types */
24#define QEMU_AIO_READ 0x0001
25#define QEMU_AIO_WRITE 0x0002
26#define QEMU_AIO_IOCTL 0x0004
27#define QEMU_AIO_FLUSH 0x0008
28#define QEMU_AIO_DISCARD 0x0010
29#define QEMU_AIO_WRITE_ZEROES 0x0020
30#define QEMU_AIO_COPY_RANGE 0x0040
31#define QEMU_AIO_TRUNCATE 0x0080
32#define QEMU_AIO_TYPE_MASK \
33 (QEMU_AIO_READ | \
34 QEMU_AIO_WRITE | \
35 QEMU_AIO_IOCTL | \
36 QEMU_AIO_FLUSH | \
37 QEMU_AIO_DISCARD | \
38 QEMU_AIO_WRITE_ZEROES | \
39 QEMU_AIO_COPY_RANGE | \
40 QEMU_AIO_TRUNCATE)
41
42/* AIO flags */
43#define QEMU_AIO_MISALIGNED 0x1000
44#define QEMU_AIO_BLKDEV 0x2000
45#define QEMU_AIO_NO_FALLBACK 0x4000
46
47
48/* linux-aio.c - Linux native implementation */
49#ifdef CONFIG_LINUX_AIO
50typedef struct LinuxAioState LinuxAioState;
51LinuxAioState *laio_init(Error **errp);
52void laio_cleanup(LinuxAioState *s);
53int coroutine_fn laio_co_submit(BlockDriverState *bs, LinuxAioState *s, int fd,
54 uint64_t offset, QEMUIOVector *qiov, int type);
55void laio_detach_aio_context(LinuxAioState *s, AioContext *old_context);
56void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context);
57void laio_io_plug(BlockDriverState *bs, LinuxAioState *s);
58void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s);
59#endif
60
61#ifdef _WIN32
62typedef struct QEMUWin32AIOState QEMUWin32AIOState;
63QEMUWin32AIOState *win32_aio_init(void);
64void win32_aio_cleanup(QEMUWin32AIOState *aio);
65int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile);
66BlockAIOCB *win32_aio_submit(BlockDriverState *bs,
67 QEMUWin32AIOState *aio, HANDLE hfile,
68 uint64_t offset, uint64_t bytes, QEMUIOVector *qiov,
69 BlockCompletionFunc *cb, void *opaque, int type);
70void win32_aio_detach_aio_context(QEMUWin32AIOState *aio,
71 AioContext *old_context);
72void win32_aio_attach_aio_context(QEMUWin32AIOState *aio,
73 AioContext *new_context);
74#endif
75
76#endif /* QEMU_RAW_AIO_H */
77