LDI_AREAD(9F) Kernel Functions for Drivers LDI_AREAD(9F)

NAME


ldi_aread, ldi_awrite - Issue an asynchronous read or write request to a
device

SYNOPSIS


#include <sys/sunldi.h>

int ldi_aread(ldi_handle_t lh, struct aio_req *aio_reqp, cred_t *cr);


int ldi_awrite(ldi_handle_t lh, struct aio_req *aio_reqp, cred_t *cr);


PARAMETERS


lh
Layered handle.


cr
Pointer to a credential structure.


aio_reqp
Pointer to the aio_req(9S) structure that describes where
the data is to be stored or obtained from.


DESCRIPTION


The ldi_awrite() function passes an asynchronous write request to a
device entry point specified by the layered handle. This operation is
supported for block and character devices.


The ldi_aread() function passes an asynchronous read request to a device
entry point specified by the layered handle. This operation is supported
for block and character devices.

RETURN VALUES


The ldi_awrite() and ldi_aread() functions return 0 upon success. If a
failure occurs before the request is passed on to the device, the
possible return values are shown below. Otherwise any other error number
may be returned by the device.

EINVAL
Invalid input parameters.


ENOTSUP
Operation is not supported for this device.


CONTEXT


These functions may be called from user context.

illumos June 3, 2003 LDI_AREAD(9F)