root / posix-aio-compat.h @ 5493e33f
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/*
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* QEMU posix-aio emulation
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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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*/
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#ifndef QEMU_POSIX_AIO_COMPAT_H
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#define QEMU_POSIX_AIO_COMPAT_H
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#include <sys/types.h> |
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#include <unistd.h> |
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#include <signal.h> |
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#include "sys-queue.h" |
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#define QEMU_PAIO_CANCELED 0x01 |
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#define QEMU_PAIO_NOTCANCELED 0x02 |
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#define QEMU_PAIO_ALLDONE 0x03 |
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struct qemu_paiocb
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{ |
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int aio_fildes;
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union {
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struct iovec *aio_iov;
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void *aio_ioctl_buf;
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}; |
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int aio_niov;
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size_t aio_nbytes; |
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#define aio_ioctl_cmd aio_nbytes /* for QEMU_PAIO_IOCTL */ |
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int ev_signo;
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off_t aio_offset; |
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unsigned aio_flags;
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/* 512 byte alignment required for buffer, offset and length */
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#define QEMU_AIO_SECTOR_ALIGNED 0x01 |
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/* private */
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TAILQ_ENTRY(qemu_paiocb) node; |
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int aio_type;
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#define QEMU_PAIO_READ 0x01 |
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#define QEMU_PAIO_WRITE 0x02 |
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#define QEMU_PAIO_IOCTL 0x03 |
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ssize_t ret; |
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int active;
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}; |
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struct qemu_paioinit
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{ |
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unsigned int aio_threads; |
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unsigned int aio_num; |
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unsigned int aio_idle_time; |
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}; |
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int qemu_paio_init(struct qemu_paioinit *aioinit); |
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int qemu_paio_read(struct qemu_paiocb *aiocb); |
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int qemu_paio_write(struct qemu_paiocb *aiocb); |
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int qemu_paio_ioctl(struct qemu_paiocb *aiocb); |
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int qemu_paio_error(struct qemu_paiocb *aiocb); |
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ssize_t qemu_paio_return(struct qemu_paiocb *aiocb);
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int qemu_paio_cancel(int fd, struct qemu_paiocb *aiocb); |
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#endif
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