linux-headers: update to 3.12-rc1
[qemu/ar7.git] / block / raw-aio.h
blobc61f1595d96c03d628c428f2586d94958edfb51b
1 /*
2 * Declarations for AIO in the raw protocol
4 * Copyright IBM, Corp. 2008
6 * Authors:
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
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.
15 #ifndef QEMU_RAW_AIO_H
16 #define QEMU_RAW_AIO_H
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_TYPE_MASK \
25 (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH| \
26 QEMU_AIO_DISCARD)
28 /* AIO flags */
29 #define QEMU_AIO_MISALIGNED 0x1000
30 #define QEMU_AIO_BLKDEV 0x2000
33 /* linux-aio.c - Linux native implementation */
34 #ifdef CONFIG_LINUX_AIO
35 void *laio_init(void);
36 BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
37 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
38 BlockDriverCompletionFunc *cb, void *opaque, int type);
39 #endif
41 #ifdef _WIN32
42 typedef struct QEMUWin32AIOState QEMUWin32AIOState;
43 QEMUWin32AIOState *win32_aio_init(void);
44 int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile);
45 BlockDriverAIOCB *win32_aio_submit(BlockDriverState *bs,
46 QEMUWin32AIOState *aio, HANDLE hfile,
47 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
48 BlockDriverCompletionFunc *cb, void *opaque, int type);
49 #endif
51 #endif /* QEMU_RAW_AIO_H */