#include
typedef __kernel_ulong_t aio_context_t;
enum {
IOCB_CMD_PREAD = 0,
IOCB_CMD_PWRITE = 1,
IOCB_CMD_FSYNC = 2,
IOCB_CMD_FDSYNC = 3,
/* These two are experimental.
* IOCB_CMD_PREADX = 4,
* 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.
*/
#define IOCB_FLAG_RESFD (1 << 0)
/* 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 */
};
#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN)
#define PADDED(x,y) x, y
#elif defined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN)
#define PADDED(x,y) y, x
#else
#error edit for your odd byteorder.
#endif
/*
* 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 */
__u32 PADDED(aio_key, aio_reserved1);
/* the kernel sets aio_key to the req # */
/* 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 */