/* * QEMU Posix block I/O backend AIO support * * Copyright IBM, Corp. 2008 * * Authors: * Anthony Liguori <aliguori@us.ibm.com> * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. * */ #ifndef QEMU_RAW_POSIX_AIO_H #define QEMU_RAW_POSIX_AIO_H /* AIO request types */ #define QEMU_AIO_READ 0x0001 #define QEMU_AIO_WRITE 0x0002 #define QEMU_AIO_IOCTL 0x0004 #define QEMU_AIO_FLUSH 0x0008 #define QEMU_AIO_TYPE_MASK \ (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH) /* AIO flags */ #define QEMU_AIO_MISALIGNED 0x1000 /* posix-aio-compat.c - thread pool based implementation */ int paio_init(void); BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd, int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, BlockDriverCompletionFunc *cb, void *opaque, int type); BlockDriverAIOCB *paio_ioctl(BlockDriverState *bs, int fd, unsigned long int req, void *buf, BlockDriverCompletionFunc *cb, void *opaque); /* linux-aio.c - Linux native implementation */ void *laio_init(void); BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd, int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, BlockDriverCompletionFunc *cb, void *opaque, int type); #endif /* QEMU_RAW_POSIX_AIO_H */