File:  [Qemu by Fabrice Bellard] / qemu / block / raw-posix-aio.h
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 17:40:37 2018 UTC (3 years, 4 months ago) by root
Branches: qemu, MAIN
CVS tags: qemu1001, qemu1000, qemu0151, qemu0150, qemu0141, qemu0140, qemu0130, qemu0125, qemu0124, qemu0123, qemu0122, qemu0121, qemu0120, HEAD
qemu 0.12.0

/*
 * 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 */

unix.superglobalmegacorp.com