| | 1 | /* |
| | 2 | * Declarations for AIO in the raw protocol |
| | 3 | * |
| | 4 | * Copyright IBM, Corp. 2008 |
| | 5 | * |
| | 6 | * Authors: |
| | 7 | * Anthony Liguori <[email protected]> |
| | 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 | void laio_cleanup(void *s); |
| | 38 | BlockAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd, |
| | 39 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
| | 40 | BlockCompletionFunc *cb, void *opaque, int type); |
| | 41 | void laio_detach_aio_context(void *s, AioContext *old_context); |
| | 42 | void laio_attach_aio_context(void *s, AioContext *new_context); |
| | 43 | void laio_io_plug(BlockDriverState *bs, void *aio_ctx); |
| | 44 | void laio_io_unplug(BlockDriverState *bs, void *aio_ctx, bool unplug); |
| | 45 | #endif |
| | 46 | |
| | 47 | #ifdef _WIN32 |
| | 48 | typedef struct QEMUWin32AIOState QEMUWin32AIOState; |
| | 49 | QEMUWin32AIOState *win32_aio_init(void); |
| | 50 | void win32_aio_cleanup(QEMUWin32AIOState *aio); |
| | 51 | int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile); |
| | 52 | BlockAIOCB *win32_aio_submit(BlockDriverState *bs, |
| | 53 | QEMUWin32AIOState *aio, HANDLE hfile, |
| | 54 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
| | 55 | BlockCompletionFunc *cb, void *opaque, int type); |
| | 56 | void win32_aio_detach_aio_context(QEMUWin32AIOState *aio, |
| | 57 | AioContext *old_context); |
| | 58 | void win32_aio_attach_aio_context(QEMUWin32AIOState *aio, |
| | 59 | AioContext *new_context); |
| | 60 | #endif |
| | 61 | |
| | 62 | #endif /* QEMU_RAW_AIO_H */ |
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