1 /* 2 * QEMU Posix block I/O backend AIO support 3 * 4 * Copyright IBM, Corp. 2008 5 * 6 * Authors: 7 * Anthony Liguori <aliguori (at) 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_FLUSH 0x0008 21 #define QEMU_AIO_TYPE_MASK \ 22 (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH) 23 24 /* AIO flags */ 25 #define QEMU_AIO_MISALIGNED 0x1000 26 27 28 /* posix-aio-compat.c - thread pool based implementation */ 29 int paio_init(void); 30 BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd, 31 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, 32 BlockDriverCompletionFunc *cb, void *opaque, int type); 33 BlockDriverAIOCB *paio_ioctl(BlockDriverState *bs, int fd, 34 unsigned long int req, void *buf, 35 BlockDriverCompletionFunc *cb, void *opaque); 36 37 /* linux-aio.c - Linux native implementation */ 38 void *laio_init(void); 39 BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd, 40 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, 41 BlockDriverCompletionFunc *cb, void *opaque, int type); 42 43 #endif /* QEMU_RAW_POSIX_AIO_H */ 44
