diff options
Diffstat (limited to 'sys/compat/linux/linux_aio.h')
| -rw-r--r-- | sys/compat/linux/linux_aio.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/sys/compat/linux/linux_aio.h b/sys/compat/linux/linux_aio.h new file mode 100644 index 0000000..96028a8 --- /dev/null +++ b/sys/compat/linux/linux_aio.h @@ -0,0 +1,98 @@ +/*- + * Copyright (c) 2006 Li, Xiao <intron@intron.ac>. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* + * Linux Kernel Implementation of Asynchronous I/O + */ + +#ifndef _LINUX_AIO_H_ +#define _LINUX_AIO_H_ + +typedef unsigned long linux_aio_context_t; + +enum { + LINUX_IOCB_CMD_PREAD = 0, + LINUX_IOCB_CMD_PWRITE = 1, + LINUX_IOCB_CMD_FSYNC = 2, + LINUX_IOCB_CMD_FDSYNC = 3, +#if 0 + LINUX_IOCB_CMD_PREADX = 4, + LINUX_IOCB_CMD_POLL = 5, +#endif + LINUX_IOCB_CMD_NOOP = 6, +}; + +struct linux_io_event { + uint64_t data; + uint64_t obj; + int64_t res; + int64_t res2; +}; + +#if _BYTE_ORDER == _LITTLE_ENDIAN +#define LINUX_AIO_PADDED(x,y) x,y +#elif _BYTE_ORDER == _BIG_ENDIAN +#define LINUX_AIO_PADDED(x,y) y,x +#else +#error Unidentified byte order !!! +#endif + +struct linux_iocb { + uint64_t aio_data; + uint32_t LINUX_AIO_PADDED(aio_key, aio_reserved1); + + uint16_t aio_lio_opcode; + int16_t aio_reqprio; + uint32_t aio_fildes; + + uint64_t aio_buf; + uint64_t aio_nbytes; + int64_t aio_offset; + + uint64_t aio_reserved2; /* TODO: use this for a (struct sigevent *) */ + uint64_t aio_reserved3; + +}; + +/* User space context information structure */ +struct linux_aio_ring { + l_uint ring_id; + l_uint ring_nr; + l_uint ring_head; + l_uint ring_tail; +#define LINUX_AIO_RING_MAGIC 0xa10a10a1 + l_uint ring_magic; +#define LINUX_AIO_RING_COMPAT_FEATURES 1 + l_uint ring_compat_features; +#define LINUX_AIO_RING_INCOMPAT_FEATURES 0 + l_uint ring_incompat_features; + l_uint ring_header_length; /* Size of this structure */ + + struct linux_io_event ring_io_events[0]; +}; + +#endif /* !_LINUX_AIO_H_ */ |
