1224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng/* include/linux/aio_abi.h 2224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * 3224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * Copyright 2000,2001,2002 Red Hat. 4224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * 5224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * Written by Benjamin LaHaise <bcrl@kvack.org> 6224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * 7224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * Distribute under the terms of the GPLv2 (see ../../COPYING) or under 8224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * the following terms. 9224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * 10224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * Permission to use, copy, modify, and distribute this software and its 11224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * documentation is hereby granted, provided that the above copyright 12224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * notice appears in all copies. This software is provided without any 13224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * warranty, express or implied. Red Hat makes no representations about 14224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * the suitability of this software for any purpose. 15224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * 16224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * IN NO EVENT SHALL RED HAT BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, 17224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF 18224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF RED HAT HAS BEEN ADVISED 19224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * OF THE POSSIBILITY OF SUCH DAMAGE. 20224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * 21224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * RED HAT DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND 24224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * RED HAT HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, 25224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * ENHANCEMENTS, OR MODIFICATIONS. 26224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng */ 27224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng#ifndef __LINUX__AIO_ABI_H 28224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng#define __LINUX__AIO_ABI_H 29224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 30224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng#include <linux/types.h> 3125981136fb13bcacf5f475f3e0ec750341e1e671Christopher Ferris#include <linux/fs.h> 32224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng#include <asm/byteorder.h> 33224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 34224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Chengtypedef __kernel_ulong_t aio_context_t; 35224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 36224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Chengenum { 37224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng IOCB_CMD_PREAD = 0, 38224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng IOCB_CMD_PWRITE = 1, 39224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng IOCB_CMD_FSYNC = 2, 40224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng IOCB_CMD_FDSYNC = 3, 41224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng /* These two are experimental. 42224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * IOCB_CMD_PREADX = 4, 43224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * IOCB_CMD_POLL = 5, 44224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng */ 45224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng IOCB_CMD_NOOP = 6, 46224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng IOCB_CMD_PREADV = 7, 47224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng IOCB_CMD_PWRITEV = 8, 48224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng}; 49224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 50224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng/* 51224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * Valid flags for the "aio_flags" member of the "struct iocb". 52224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * 53224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * IOCB_FLAG_RESFD - Set if the "aio_resfd" member of the "struct iocb" 54224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * is valid. 55224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng */ 56224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng#define IOCB_FLAG_RESFD (1 << 0) 57224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 58224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng/* read() from /dev/aio returns these structures. */ 59224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Chengstruct io_event { 60224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __u64 data; /* the data field from the iocb */ 61224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __u64 obj; /* what iocb this event came from */ 62224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __s64 res; /* result code for this event */ 63224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __s64 res2; /* secondary result */ 64224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng}; 65224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 66224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng/* 67224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * we always use a 64bit off_t when communicating 68224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * with userland. its up to libraries to do the 69224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * proper padding and aio_error abstraction 70224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng */ 71224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 72224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Chengstruct iocb { 73224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng /* these are internal to the kernel/libc. */ 74224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __u64 aio_data; /* data to be returned in event's data */ 7525981136fb13bcacf5f475f3e0ec750341e1e671Christopher Ferris 7625981136fb13bcacf5f475f3e0ec750341e1e671Christopher Ferris#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN) 7725981136fb13bcacf5f475f3e0ec750341e1e671Christopher Ferris __u32 aio_key; /* the kernel sets aio_key to the req # */ 7825981136fb13bcacf5f475f3e0ec750341e1e671Christopher Ferris __kernel_rwf_t aio_rw_flags; /* RWF_* flags */ 7925981136fb13bcacf5f475f3e0ec750341e1e671Christopher Ferris#elif defined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN) 8025981136fb13bcacf5f475f3e0ec750341e1e671Christopher Ferris __kernel_rwf_t aio_rw_flags; /* RWF_* flags */ 8125981136fb13bcacf5f475f3e0ec750341e1e671Christopher Ferris __u32 aio_key; /* the kernel sets aio_key to the req # */ 8225981136fb13bcacf5f475f3e0ec750341e1e671Christopher Ferris#else 8325981136fb13bcacf5f475f3e0ec750341e1e671Christopher Ferris#error edit for your odd byteorder. 8425981136fb13bcacf5f475f3e0ec750341e1e671Christopher Ferris#endif 85224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 86224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng /* common fields */ 87224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __u16 aio_lio_opcode; /* see IOCB_CMD_ above */ 88224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __s16 aio_reqprio; 89224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __u32 aio_fildes; 90224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 91224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __u64 aio_buf; 92224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __u64 aio_nbytes; 93224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __s64 aio_offset; 94224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 95224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng /* extra parameters */ 96224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __u64 aio_reserved2; /* TODO: use this for a (struct sigevent *) */ 97224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 98224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng /* flags for the "struct iocb" */ 99224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __u32 aio_flags; 100224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 101224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng /* 102224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * if the IOCB_FLAG_RESFD flag of "aio_flags" is set, this is an 103224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng * eventfd to signal AIO readiness to 104224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng */ 105224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng __u32 aio_resfd; 106224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng}; /* 64 bytes */ 107224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 108224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng#undef IFBIG 109224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng#undef IFLITTLE 110224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 111224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng#endif /* __LINUX__AIO_ABI_H */ 112224b54f69543a5c0ec18f99bd717d2b724582eb6Ben Cheng 113