cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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aio_abi.h (3398B)

      1/* 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 <linux/fs.h>
     32#include <asm/byteorder.h>
     33
     34typedef __kernel_ulong_t aio_context_t;
     35
     36enum {
     37	IOCB_CMD_PREAD = 0,
     38	IOCB_CMD_PWRITE = 1,
     39	IOCB_CMD_FSYNC = 2,
     40	IOCB_CMD_FDSYNC = 3,
     41	/* 4 was the experimental IOCB_CMD_PREADX */
     42	IOCB_CMD_POLL = 5,
     43	IOCB_CMD_NOOP = 6,
     44	IOCB_CMD_PREADV = 7,
     45	IOCB_CMD_PWRITEV = 8,
     46};
     47
     48/*
     49 * Valid flags for the "aio_flags" member of the "struct iocb".
     50 *
     51 * IOCB_FLAG_RESFD - Set if the "aio_resfd" member of the "struct iocb"
     52 *                   is valid.
     53 * IOCB_FLAG_IOPRIO - Set if the "aio_reqprio" member of the "struct iocb"
     54 *                    is valid.
     55 */
     56#define IOCB_FLAG_RESFD		(1 << 0)
     57#define IOCB_FLAG_IOPRIO	(1 << 1)
     58
     59/* read() from /dev/aio returns these structures. */
     60struct io_event {
     61	__u64		data;		/* the data field from the iocb */
     62	__u64		obj;		/* what iocb this event came from */
     63	__s64		res;		/* result code for this event */
     64	__s64		res2;		/* secondary result */
     65};
     66
     67/*
     68 * we always use a 64bit off_t when communicating
     69 * with userland.  its up to libraries to do the
     70 * proper padding and aio_error abstraction
     71 */
     72
     73struct iocb {
     74	/* these are internal to the kernel/libc. */
     75	__u64	aio_data;	/* data to be returned in event's data */
     76
     77#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN)
     78	__u32	aio_key;	/* the kernel sets aio_key to the req # */
     79	__kernel_rwf_t aio_rw_flags;	/* RWF_* flags */
     80#elif defined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN)
     81	__kernel_rwf_t aio_rw_flags;	/* RWF_* flags */
     82	__u32	aio_key;	/* the kernel sets aio_key to the req # */
     83#else
     84#error edit for your odd byteorder.
     85#endif
     86
     87	/* common fields */
     88	__u16	aio_lio_opcode;	/* see IOCB_CMD_ above */
     89	__s16	aio_reqprio;
     90	__u32	aio_fildes;
     91
     92	__u64	aio_buf;
     93	__u64	aio_nbytes;
     94	__s64	aio_offset;
     95
     96	/* extra parameters */
     97	__u64	aio_reserved2;	/* TODO: use this for a (struct sigevent *) */
     98
     99	/* flags for the "struct iocb" */
    100	__u32	aio_flags;
    101
    102	/*
    103	 * if the IOCB_FLAG_RESFD flag of "aio_flags" is set, this is an
    104	 * eventfd to signal AIO readiness to
    105	 */
    106	__u32	aio_resfd;
    107}; /* 64 bytes */
    108
    109#undef IFBIG
    110#undef IFLITTLE
    111
    112#endif /* __LINUX__AIO_ABI_H */
    113