Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging
[qemu.git] / block / raw-aio.h
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 #ifndef QEMU_RAW_AIO_H
16 #define QEMU_RAW_AIO_H
17
18 /* AIO request types */
19 #define QEMU_AIO_READ 0x0001
20 #define QEMU_AIO_WRITE 0x0002
21 #define QEMU_AIO_IOCTL 0x0004
22 #define QEMU_AIO_FLUSH 0x0008
23 #define QEMU_AIO_DISCARD 0x0010
24 #define QEMU_AIO_WRITE_ZEROES 0x0020
25 #define QEMU_AIO_TYPE_MASK \
26 (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH| \
27 QEMU_AIO_DISCARD|QEMU_AIO_WRITE_ZEROES)
28
29 /* AIO flags */
30 #define QEMU_AIO_MISALIGNED 0x1000
31 #define QEMU_AIO_BLKDEV 0x2000
32
33
34 /* linux-aio.c - Linux native implementation */
35 #ifdef CONFIG_LINUX_AIO
36 void *laio_init(void);
37 BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
38 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
39 BlockDriverCompletionFunc *cb, void *opaque, int type);
40 #endif
41
42 #ifdef _WIN32
43 typedef struct QEMUWin32AIOState QEMUWin32AIOState;
44 QEMUWin32AIOState *win32_aio_init(void);
45 int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile);
46 BlockDriverAIOCB *win32_aio_submit(BlockDriverState *bs,
47 QEMUWin32AIOState *aio, HANDLE hfile,
48 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
49 BlockDriverCompletionFunc *cb, void *opaque, int type);
50 #endif
51
52 #endif /* QEMU_RAW_AIO_H */