mirror of https://gitee.com/openkylin/qemu.git
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/*
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* QEMU Posix block I/O backend AIO support
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*
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* Copyright IBM, Corp. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#ifndef QEMU_RAW_POSIX_AIO_H
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#define QEMU_RAW_POSIX_AIO_H
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/* AIO request types */
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#define QEMU_AIO_READ 0x0001
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#define QEMU_AIO_WRITE 0x0002
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#define QEMU_AIO_IOCTL 0x0004
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#define QEMU_AIO_FLUSH 0x0008
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#define QEMU_AIO_TYPE_MASK \
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(QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH)
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/* AIO flags */
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#define QEMU_AIO_MISALIGNED 0x1000
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/* posix-aio-compat.c - thread pool based implementation */
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int paio_init(void);
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BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd,
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int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque, int type);
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BlockDriverAIOCB *paio_ioctl(BlockDriverState *bs, int fd,
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unsigned long int req, void *buf,
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BlockDriverCompletionFunc *cb, void *opaque);
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/* linux-aio.c - Linux native implementation */
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void *laio_init(void);
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BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
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int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque, int type);
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#endif /* QEMU_RAW_POSIX_AIO_H */
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