1 /* include/linux/aio_abi.h
3 * Copyright 2000,2001,2002 Red Hat.
5 * Written by Benjamin LaHaise <bcrl@kvack.org>
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27 #ifndef __LINUX__AIO_ABI_H
28 #define __LINUX__AIO_ABI_H
30 #include <linux/types.h>
31 #include <asm/byteorder.h>
33 typedef unsigned long aio_context_t
;
40 /* These two are experimental.
41 * IOCB_CMD_PREADX = 4,
50 * Valid flags for the "aio_flags" member of the "struct iocb".
52 * IOCB_FLAG_RESFD - Set if the "aio_resfd" member of the "struct iocb"
55 #define IOCB_FLAG_RESFD (1 << 0)
57 /* read() from /dev/aio returns these structures. */
59 __u64 data
; /* the data field from the iocb */
60 __u64 obj
; /* what iocb this event came from */
61 __s64 res
; /* result code for this event */
62 __s64 res2
; /* secondary result */
65 #if defined(__LITTLE_ENDIAN)
66 #define PADDED(x,y) x, y
67 #elif defined(__BIG_ENDIAN)
68 #define PADDED(x,y) y, x
70 #error edit for your odd byteorder.
74 * we always use a 64bit off_t when communicating
75 * with userland. its up to libraries to do the
76 * proper padding and aio_error abstraction
80 /* these are internal to the kernel/libc. */
81 __u64 aio_data
; /* data to be returned in event's data */
82 __u32
PADDED(aio_key
, aio_reserved1
);
83 /* the kernel sets aio_key to the req # */
86 __u16 aio_lio_opcode
; /* see IOCB_CMD_ above */
94 /* extra parameters */
95 __u64 aio_reserved2
; /* TODO: use this for a (struct sigevent *) */
97 /* flags for the "struct iocb" */
101 * if the IOCB_FLAG_RESFD flag of "aio_flags" is set, this is an
102 * eventfd to signal AIO readiness to
110 #endif /* __LINUX__AIO_ABI_H */
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