| 1 |
13 |
serginhofr |
/* include/linux/aio_abi.h
|
| 2 |
|
|
*
|
| 3 |
|
|
* Copyright 2000,2001,2002 Red Hat.
|
| 4 |
|
|
*
|
| 5 |
|
|
* Written by Benjamin LaHaise <bcrl@kvack.org>
|
| 6 |
|
|
*
|
| 7 |
|
|
* Distribute under the terms of the GPLv2 (see ../../COPYING) or under
|
| 8 |
|
|
* the following terms.
|
| 9 |
|
|
*
|
| 10 |
|
|
* Permission to use, copy, modify, and distribute this software and its
|
| 11 |
|
|
* documentation is hereby granted, provided that the above copyright
|
| 12 |
|
|
* notice appears in all copies. This software is provided without any
|
| 13 |
|
|
* warranty, express or implied. Red Hat makes no representations about
|
| 14 |
|
|
* the suitability of this software for any purpose.
|
| 15 |
|
|
*
|
| 16 |
|
|
* IN NO EVENT SHALL RED HAT BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
|
| 17 |
|
|
* SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
|
| 18 |
|
|
* THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF RED HAT HAS BEEN ADVISED
|
| 19 |
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
| 20 |
|
|
*
|
| 21 |
|
|
* RED HAT DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 22 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
| 23 |
|
|
* PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND
|
| 24 |
|
|
* RED HAT HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
|
| 25 |
|
|
* ENHANCEMENTS, OR MODIFICATIONS.
|
| 26 |
|
|
*/
|
| 27 |
|
|
#ifndef __LINUX__AIO_ABI_H
|
| 28 |
|
|
#define __LINUX__AIO_ABI_H
|
| 29 |
|
|
|
| 30 |
|
|
#include <linux/types.h>
|
| 31 |
|
|
#include <asm/byteorder.h>
|
| 32 |
|
|
|
| 33 |
|
|
typedef __kernel_ulong_t aio_context_t;
|
| 34 |
|
|
|
| 35 |
|
|
enum {
|
| 36 |
|
|
IOCB_CMD_PREAD = 0,
|
| 37 |
|
|
IOCB_CMD_PWRITE = 1,
|
| 38 |
|
|
IOCB_CMD_FSYNC = 2,
|
| 39 |
|
|
IOCB_CMD_FDSYNC = 3,
|
| 40 |
|
|
/* These two are experimental.
|
| 41 |
|
|
* IOCB_CMD_PREADX = 4,
|
| 42 |
|
|
* IOCB_CMD_POLL = 5,
|
| 43 |
|
|
*/
|
| 44 |
|
|
IOCB_CMD_NOOP = 6,
|
| 45 |
|
|
IOCB_CMD_PREADV = 7,
|
| 46 |
|
|
IOCB_CMD_PWRITEV = 8,
|
| 47 |
|
|
};
|
| 48 |
|
|
|
| 49 |
|
|
/*
|
| 50 |
|
|
* Valid flags for the "aio_flags" member of the "struct iocb".
|
| 51 |
|
|
*
|
| 52 |
|
|
* IOCB_FLAG_RESFD - Set if the "aio_resfd" member of the "struct iocb"
|
| 53 |
|
|
* is valid.
|
| 54 |
|
|
*/
|
| 55 |
|
|
#define IOCB_FLAG_RESFD (1 << 0)
|
| 56 |
|
|
|
| 57 |
|
|
/* read() from /dev/aio returns these structures. */
|
| 58 |
|
|
struct io_event {
|
| 59 |
|
|
__u64 data; /* the data field from the iocb */
|
| 60 |
|
|
__u64 obj; /* what iocb this event came from */
|
| 61 |
|
|
__s64 res; /* result code for this event */
|
| 62 |
|
|
__s64 res2; /* secondary result */
|
| 63 |
|
|
};
|
| 64 |
|
|
|
| 65 |
|
|
#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN)
|
| 66 |
|
|
#define PADDED(x,y) x, y
|
| 67 |
|
|
#elif defined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN)
|
| 68 |
|
|
#define PADDED(x,y) y, x
|
| 69 |
|
|
#else
|
| 70 |
|
|
#error edit for your odd byteorder.
|
| 71 |
|
|
#endif
|
| 72 |
|
|
|
| 73 |
|
|
/*
|
| 74 |
|
|
* we always use a 64bit off_t when communicating
|
| 75 |
|
|
* with userland. its up to libraries to do the
|
| 76 |
|
|
* proper padding and aio_error abstraction
|
| 77 |
|
|
*/
|
| 78 |
|
|
|
| 79 |
|
|
struct iocb {
|
| 80 |
|
|
/* these are internal to the kernel/libc. */
|
| 81 |
|
|
__u64 aio_data; /* data to be returned in event's data */
|
| 82 |
|
|
__u32 PADDED(aio_key, aio_reserved1);
|
| 83 |
|
|
/* the kernel sets aio_key to the req # */
|
| 84 |
|
|
|
| 85 |
|
|
/* common fields */
|
| 86 |
|
|
__u16 aio_lio_opcode; /* see IOCB_CMD_ above */
|
| 87 |
|
|
__s16 aio_reqprio;
|
| 88 |
|
|
__u32 aio_fildes;
|
| 89 |
|
|
|
| 90 |
|
|
__u64 aio_buf;
|
| 91 |
|
|
__u64 aio_nbytes;
|
| 92 |
|
|
__s64 aio_offset;
|
| 93 |
|
|
|
| 94 |
|
|
/* extra parameters */
|
| 95 |
|
|
__u64 aio_reserved2; /* TODO: use this for a (struct sigevent *) */
|
| 96 |
|
|
|
| 97 |
|
|
/* flags for the "struct iocb" */
|
| 98 |
|
|
__u32 aio_flags;
|
| 99 |
|
|
|
| 100 |
|
|
/*
|
| 101 |
|
|
* if the IOCB_FLAG_RESFD flag of "aio_flags" is set, this is an
|
| 102 |
|
|
* eventfd to signal AIO readiness to
|
| 103 |
|
|
*/
|
| 104 |
|
|
__u32 aio_resfd;
|
| 105 |
|
|
}; /* 64 bytes */
|
| 106 |
|
|
|
| 107 |
|
|
#undef IFBIG
|
| 108 |
|
|
#undef IFLITTLE
|
| 109 |
|
|
|
| 110 |
|
|
#endif /* __LINUX__AIO_ABI_H */
|
| 111 |
|
|
|
