2 * Declarations for AIO in the raw protocol
4 * Copyright IBM, Corp. 2008
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 #include "qemu/coroutine.h"
21 /* AIO request types */
22 #define QEMU_AIO_READ 0x0001
23 #define QEMU_AIO_WRITE 0x0002
24 #define QEMU_AIO_IOCTL 0x0004
25 #define QEMU_AIO_FLUSH 0x0008
26 #define QEMU_AIO_DISCARD 0x0010
27 #define QEMU_AIO_WRITE_ZEROES 0x0020
28 #define QEMU_AIO_COPY_RANGE 0x0040
29 #define QEMU_AIO_TYPE_MASK \
35 QEMU_AIO_WRITE_ZEROES | \
39 #define QEMU_AIO_MISALIGNED 0x1000
40 #define QEMU_AIO_BLKDEV 0x2000
43 /* linux-aio.c - Linux native implementation */
44 #ifdef CONFIG_LINUX_AIO
45 typedef struct LinuxAioState LinuxAioState
;
46 LinuxAioState
*laio_init(void);
47 void laio_cleanup(LinuxAioState
*s
);
48 int coroutine_fn
laio_co_submit(BlockDriverState
*bs
, LinuxAioState
*s
, int fd
,
49 uint64_t offset
, QEMUIOVector
*qiov
, int type
);
50 BlockAIOCB
*laio_submit(BlockDriverState
*bs
, LinuxAioState
*s
, int fd
,
51 int64_t sector_num
, QEMUIOVector
*qiov
, int nb_sectors
,
52 BlockCompletionFunc
*cb
, void *opaque
, int type
);
53 void laio_detach_aio_context(LinuxAioState
*s
, AioContext
*old_context
);
54 void laio_attach_aio_context(LinuxAioState
*s
, AioContext
*new_context
);
55 void laio_io_plug(BlockDriverState
*bs
, LinuxAioState
*s
);
56 void laio_io_unplug(BlockDriverState
*bs
, LinuxAioState
*s
);
60 typedef struct QEMUWin32AIOState QEMUWin32AIOState
;
61 QEMUWin32AIOState
*win32_aio_init(void);
62 void win32_aio_cleanup(QEMUWin32AIOState
*aio
);
63 int win32_aio_attach(QEMUWin32AIOState
*aio
, HANDLE hfile
);
64 BlockAIOCB
*win32_aio_submit(BlockDriverState
*bs
,
65 QEMUWin32AIOState
*aio
, HANDLE hfile
,
66 uint64_t offset
, uint64_t bytes
, QEMUIOVector
*qiov
,
67 BlockCompletionFunc
*cb
, void *opaque
, int type
);
68 void win32_aio_detach_aio_context(QEMUWin32AIOState
*aio
,
69 AioContext
*old_context
);
70 void win32_aio_attach_aio_context(QEMUWin32AIOState
*aio
,
71 AioContext
*new_context
);
74 #endif /* QEMU_RAW_AIO_H */