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113 lines
3.3 KiB
113 lines
3.3 KiB
/* include/linux/aio_abi.h |
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* |
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* Copyright 2000,2001,2002 Red Hat. |
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* |
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* Written by Benjamin LaHaise <[email protected]> |
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* |
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* Distribute under the terms of the GPLv2 (see ../../COPYING) or under |
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* the following terms. |
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* |
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* Permission to use, copy, modify, and distribute this software and its |
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* documentation is hereby granted, provided that the above copyright |
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* notice appears in all copies. This software is provided without any |
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* warranty, express or implied. Red Hat makes no representations about |
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* the suitability of this software for any purpose. |
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* |
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* IN NO EVENT SHALL RED HAT BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, |
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* SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF |
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* THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF RED HAT HAS BEEN ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* RED HAT DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND |
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* RED HAT HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, |
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* ENHANCEMENTS, OR MODIFICATIONS. |
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*/ |
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#ifndef __LINUX__AIO_ABI_H |
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#define __LINUX__AIO_ABI_H |
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#include <linux/types.h> |
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#include <linux/fs.h> |
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#include <asm/byteorder.h> |
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typedef __kernel_ulong_t aio_context_t; |
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enum { |
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IOCB_CMD_PREAD = 0, |
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IOCB_CMD_PWRITE = 1, |
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IOCB_CMD_FSYNC = 2, |
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IOCB_CMD_FDSYNC = 3, |
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/* 4 was the experimental IOCB_CMD_PREADX */ |
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IOCB_CMD_POLL = 5, |
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IOCB_CMD_NOOP = 6, |
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IOCB_CMD_PREADV = 7, |
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IOCB_CMD_PWRITEV = 8, |
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}; |
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/* |
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* Valid flags for the "aio_flags" member of the "struct iocb". |
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* |
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* IOCB_FLAG_RESFD - Set if the "aio_resfd" member of the "struct iocb" |
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* is valid. |
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* IOCB_FLAG_IOPRIO - Set if the "aio_reqprio" member of the "struct iocb" |
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* is valid. |
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*/ |
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#define IOCB_FLAG_RESFD (1 << 0) |
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#define IOCB_FLAG_IOPRIO (1 << 1) |
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/* read() from /dev/aio returns these structures. */ |
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struct io_event { |
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__u64 data; /* the data field from the iocb */ |
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__u64 obj; /* what iocb this event came from */ |
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__s64 res; /* result code for this event */ |
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__s64 res2; /* secondary result */ |
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}; |
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/* |
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* we always use a 64bit off_t when communicating |
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* with userland. its up to libraries to do the |
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* proper padding and aio_error abstraction |
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*/ |
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struct iocb { |
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/* these are internal to the kernel/libc. */ |
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__u64 aio_data; /* data to be returned in event's data */ |
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#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN) |
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__u32 aio_key; /* the kernel sets aio_key to the req # */ |
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__kernel_rwf_t aio_rw_flags; /* RWF_* flags */ |
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#elif defined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN) |
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__kernel_rwf_t aio_rw_flags; /* RWF_* flags */ |
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__u32 aio_key; /* the kernel sets aio_key to the req # */ |
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#else |
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#error edit for your odd byteorder. |
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#endif |
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/* common fields */ |
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__u16 aio_lio_opcode; /* see IOCB_CMD_ above */ |
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__s16 aio_reqprio; |
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__u32 aio_fildes; |
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__u64 aio_buf; |
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__u64 aio_nbytes; |
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__s64 aio_offset; |
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/* extra parameters */ |
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__u64 aio_reserved2; /* TODO: use this for a (struct sigevent *) */ |
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/* flags for the "struct iocb" */ |
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__u32 aio_flags; |
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/* |
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* if the IOCB_FLAG_RESFD flag of "aio_flags" is set, this is an |
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* eventfd to signal AIO readiness to |
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*/ |
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__u32 aio_resfd; |
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}; /* 64 bytes */ |
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#undef IFBIG |
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#undef IFLITTLE |
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#endif /* __LINUX__AIO_ABI_H */ |
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