projects / mirror_qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 9ef91a67 CH |
1 | /* |
| 2 | * QEMU Posix block I/O backend AIO support | |
| 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 | */ | |
| 13 | #ifndef QEMU_RAW_POSIX_AIO_H | |
| 14 | #define QEMU_RAW_POSIX_AIO_H | |
| 15 | ||
| 16 | /* AIO request types */ | |
| 17 | #define QEMU_AIO_READ 0x0001 | |
| 18 | #define QEMU_AIO_WRITE 0x0002 | |
| 19 | #define QEMU_AIO_IOCTL 0x0004 | |
| 20 | #define QEMU_AIO_TYPE_MASK \ | |
| 21 | (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL) | |
| 22 | ||
| 23 | /* AIO flags */ | |
| 24 | #define QEMU_AIO_MISALIGNED 0x1000 | |
| 25 | ||
| 26 | ||
| 27 | /* posix-aio-compat.c - thread pool based implementation */ | |
| 28 | void *paio_init(void); | |
| 29 | BlockDriverAIOCB *paio_submit(BlockDriverState *bs, void *aio_ctx, int fd, | |
| 30 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
| 31 | BlockDriverCompletionFunc *cb, void *opaque, int type); | |
| 32 | BlockDriverAIOCB *paio_ioctl(BlockDriverState *bs, int fd, | |
| 33 | unsigned long int req, void *buf, | |
| 34 | BlockDriverCompletionFunc *cb, void *opaque); | |
| 35 | ||
| 5c6c3a6c CH |
36 | /* linux-aio.c - Linux native implementation */ |
| 37 | void *laio_init(void); | |
| 38 | BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd, | |
| 39 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
| 40 | BlockDriverCompletionFunc *cb, void *opaque, int type); | |
| 41 | ||
| 9ef91a67 | 42 | #endif /* QEMU_RAW_POSIX_AIO_H */ |