NAME

mioc2ack - Convert an M_IOCTL message to an M_IOCACK message

SYNOPSIS

#include <sys/stream.h>
#include <sys/strsun.h>
void mioc2ack(mblk_t *mp, mblk_t *dp, size_t count, int rval);

INTERFACE LEVEL

illumos DDI specific (illumos DDI).

PARAMETERS

M_IOCTL message.

Payload to associate with M_IOCACK message.

count

Value to set the ioc_count of the iocblk(9S) to.

rval

Value to set the ioc_rval of the iocblk(9S) to.

DESCRIPTION

The mioc2ack() function converts an M_IOCTL message into an M_IOCACK message using the supplied arguments.

To convert the message, mioc2ack() changes the message type to M_IOCACK, sets the ioc_count and ioc_rval members of the iocblk(9S) associated with mp to the passed-in values, and clears the ioc_error field. Further, it frees any message blocks chained off of mp->b_cont and resets mp->b_cont to dp. Finally, if dp is not NULL, mioc2ack() resets dp->b_wptr to be dp->b_rptr + count (that is, it sets dp to be exactly count bytes in length).

RETURN VALUES

None.

CONTEXT

This function can be called from user, kernel or interrupt context.