/* include/linux/aio_abi.h * * Copyright 2000,2001,2002 Red Hat. * * Written by Benjamin LaHaise <bcrl@kvack.org> * * Distribute under the terms of the GPLv2 (see ../../COPYING) or under * the following terms. * * Permission to use, copy, modify, and distribute this software and its * documentation is hereby granted, provided that the above copyright * notice appears in all copies. This software is provided without any * warranty, express or implied. Red Hat makes no representations about * the suitability of this software for any purpose. * * IN NO EVENT SHALL RED HAT BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, * SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF * THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF RED HAT HAS BEEN ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * RED HAT DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND * RED HAT HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, * ENHANCEMENTS, OR MODIFICATIONS.
*/ #ifndef __LINUX__AIO_ABI_H #define __LINUX__AIO_ABI_H
/* * Valid flags for the "aio_flags" member of the "struct iocb". * * IOCB_FLAG_RESFD - Set if the "aio_resfd" member of the "struct iocb" * is valid. * IOCB_FLAG_IOPRIO - Set if the "aio_reqprio" member of the "struct iocb" * is valid.
*/ #define IOCB_FLAG_RESFD (1 << 0) #define IOCB_FLAG_IOPRIO (1 << 1)
/* read() from /dev/aio returns these structures. */ struct io_event {
__u64 data; /* the data field from the iocb */
__u64 obj; /* what iocb this event came from */
__s64 res; /* result code for this event */
__s64 res2; /* secondary result */
};
/* * we always use a 64bit off_t when communicating * with userland. its up to libraries to do the * proper padding and aio_error abstraction
*/
struct iocb { /* these are internal to the kernel/libc. */
__u64 aio_data; /* data to be returned in event's data */
#ifdefined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN)
__u32 aio_key; /* the kernel sets aio_key to the req # */
__kernel_rwf_t aio_rw_flags; /* RWF_* flags */ #elifdefined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN)
__kernel_rwf_t aio_rw_flags; /* RWF_* flags */
__u32 aio_key; /* the kernel sets aio_key to the req # */ #else #error edit for your odd byteorder. #endif
/* common fields */
__u16 aio_lio_opcode; /* see IOCB_CMD_ above */
__s16 aio_reqprio;
__u32 aio_fildes;
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