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.
16 #ifndef QEMU_RAW_AIO_H
17 #define QEMU_RAW_AIO_H
19 #include "block/aio.h"
20 #include "qemu/coroutine.h"
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 \
38 QEMU_AIO_WRITE_ZEROES | \
39 QEMU_AIO_COPY_RANGE | \
43 #define QEMU_AIO_MISALIGNED 0x1000
44 #define QEMU_AIO_BLKDEV 0x2000
45 #define QEMU_AIO_NO_FALLBACK 0x4000
48 /* linux-aio.c - Linux native implementation */
49 #ifdef CONFIG_LINUX_AIO
50 typedef struct LinuxAioState LinuxAioState
;
51 LinuxAioState
*laio_init(Error
**errp
);
52 void laio_cleanup(LinuxAioState
*s
);
53 int coroutine_fn
laio_co_submit(BlockDriverState
*bs
, LinuxAioState
*s
, int fd
,
54 uint64_t offset
, QEMUIOVector
*qiov
, int type
);
55 void laio_detach_aio_context(LinuxAioState
*s
, AioContext
*old_context
);
56 void laio_attach_aio_context(LinuxAioState
*s
, AioContext
*new_context
);
57 void laio_io_plug(BlockDriverState
*bs
, LinuxAioState
*s
);
58 void laio_io_unplug(BlockDriverState
*bs
, LinuxAioState
*s
);
60 /* io_uring.c - Linux io_uring implementation */
61 #ifdef CONFIG_LINUX_IO_URING
62 typedef struct LuringState LuringState
;
63 LuringState
*luring_init(Error
**errp
);
64 void luring_cleanup(LuringState
*s
);
65 int coroutine_fn
luring_co_submit(BlockDriverState
*bs
, LuringState
*s
, int fd
,
66 uint64_t offset
, QEMUIOVector
*qiov
, int type
);
67 void luring_detach_aio_context(LuringState
*s
, AioContext
*old_context
);
68 void luring_attach_aio_context(LuringState
*s
, AioContext
*new_context
);
69 void luring_io_plug(BlockDriverState
*bs
, LuringState
*s
);
70 void luring_io_unplug(BlockDriverState
*bs
, LuringState
*s
);
74 typedef struct QEMUWin32AIOState QEMUWin32AIOState
;
75 QEMUWin32AIOState
*win32_aio_init(void);
76 void win32_aio_cleanup(QEMUWin32AIOState
*aio
);
77 int win32_aio_attach(QEMUWin32AIOState
*aio
, HANDLE hfile
);
78 BlockAIOCB
*win32_aio_submit(BlockDriverState
*bs
,
79 QEMUWin32AIOState
*aio
, HANDLE hfile
,
80 uint64_t offset
, uint64_t bytes
, QEMUIOVector
*qiov
,
81 BlockCompletionFunc
*cb
, void *opaque
, int type
);
82 void win32_aio_detach_aio_context(QEMUWin32AIOState
*aio
,
83 AioContext
*old_context
);
84 void win32_aio_attach_aio_context(QEMUWin32AIOState
*aio
,
85 AioContext
*new_context
);
88 #endif /* QEMU_RAW_AIO_H */