| /* 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 |
| |
| #include <linux/types.h> |
| #include <linux/fs.h> |
| #include <asm/byteorder.h> |
| |
| typedef __kernel_ulong_t aio_context_t; |
| |
| enum { |
| IOCB_CMD_PREAD = 0, |
| IOCB_CMD_PWRITE = 1, |
| IOCB_CMD_FSYNC = 2, |
| IOCB_CMD_FDSYNC = 3, |
| /* 4 was the experimental IOCB_CMD_PREADX */ |
| IOCB_CMD_POLL = 5, |
| IOCB_CMD_NOOP = 6, |
| IOCB_CMD_PREADV = 7, |
| IOCB_CMD_PWRITEV = 8, |
| }; |
| |
| /* |
| * 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 */ |
| |
| #if defined(__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 */ |
| #elif defined(__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; |
| |
| __u64 aio_buf; |
| __u64 aio_nbytes; |
| __s64 aio_offset; |
| |
| /* extra parameters */ |
| __u64 aio_reserved2; /* TODO: use this for a (struct sigevent *) */ |
| |
| /* flags for the "struct iocb" */ |
| __u32 aio_flags; |
| |
| /* |
| * if the IOCB_FLAG_RESFD flag of "aio_flags" is set, this is an |
| * eventfd to signal AIO readiness to |
| */ |
| __u32 aio_resfd; |
| }; /* 64 bytes */ |
| |
| #undef IFBIG |
| #undef IFLITTLE |
| |
| #endif /* __LINUX__AIO_ABI_H */ |
| |