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 "block/block-common.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_ZONE_REPORT 0x0100
33 #define QEMU_AIO_ZONE_MGMT 0x0200
34 #define QEMU_AIO_ZONE_APPEND 0x0400
35 #define QEMU_AIO_TYPE_MASK \
36 (QEMU_AIO_READ | \
37 QEMU_AIO_WRITE | \
38 QEMU_AIO_IOCTL | \
39 QEMU_AIO_FLUSH | \
40 QEMU_AIO_DISCARD | \
41 QEMU_AIO_WRITE_ZEROES | \
42 QEMU_AIO_COPY_RANGE | \
43 QEMU_AIO_TRUNCATE | \
44 QEMU_AIO_ZONE_REPORT | \
45 QEMU_AIO_ZONE_MGMT | \
46 QEMU_AIO_ZONE_APPEND)
47
48 /* AIO flags */
49 #define QEMU_AIO_MISALIGNED 0x1000
50 #define QEMU_AIO_BLKDEV 0x2000
51 #define QEMU_AIO_NO_FALLBACK 0x4000
52
53
54 /* linux-aio.c - Linux native implementation */
55 #ifdef CONFIG_LINUX_AIO
56 typedef struct LinuxAioState LinuxAioState;
57 LinuxAioState *laio_init(Error **errp);
58 void laio_cleanup(LinuxAioState *s);
59
60 /* laio_co_submit: submit I/O requests in the thread's current AioContext. */
61 int coroutine_fn laio_co_submit(int fd, uint64_t offset, QEMUIOVector *qiov,
62 int type, BdrvRequestFlags flags,
63 uint64_t dev_max_batch);
64
65 bool laio_has_fdsync(int);
66 bool laio_has_fua(void);
67 void laio_detach_aio_context(LinuxAioState *s, AioContext *old_context);
68 void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context);
69 #else
laio_has_fua(void)70 static inline bool laio_has_fua(void)
71 {
72 return false;
73 }
74 #endif
75 /* io_uring.c - Linux io_uring implementation */
76 #ifdef CONFIG_LINUX_IO_URING
77 LuringState *luring_init(Error **errp);
78 void luring_cleanup(LuringState *s);
79
80 /* luring_co_submit: submit I/O requests in the thread's current AioContext. */
81 int coroutine_fn luring_co_submit(BlockDriverState *bs, int fd, uint64_t offset,
82 QEMUIOVector *qiov, int type,
83 BdrvRequestFlags flags);
84 void luring_detach_aio_context(LuringState *s, AioContext *old_context);
85 void luring_attach_aio_context(LuringState *s, AioContext *new_context);
86 bool luring_has_fua(void);
87 #else
luring_has_fua(void)88 static inline bool luring_has_fua(void)
89 {
90 return false;
91 }
92 #endif
93
94 #ifdef _WIN32
95 typedef struct QEMUWin32AIOState QEMUWin32AIOState;
96 QEMUWin32AIOState *win32_aio_init(void);
97 void win32_aio_cleanup(QEMUWin32AIOState *aio);
98 int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile);
99 BlockAIOCB *win32_aio_submit(BlockDriverState *bs,
100 QEMUWin32AIOState *aio, HANDLE hfile,
101 uint64_t offset, uint64_t bytes, QEMUIOVector *qiov,
102 BlockCompletionFunc *cb, void *opaque, int type);
103 void win32_aio_detach_aio_context(QEMUWin32AIOState *aio,
104 AioContext *old_context);
105 void win32_aio_attach_aio_context(QEMUWin32AIOState *aio,
106 AioContext *new_context);
107 #endif
108
109 #endif /* QEMU_RAW_AIO_H */
110