miocnak(9F) Kernel Functions for Drivers miocnak(9F)NAMEmiocnak - Negatively acknowledge an M_IOCTL message
SYNOPSIS
#include <sys/stream.h>
#include <sys/strsun.h>
void miocnak(queue_t *wq, mblk_t *mp, int count, int error);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
PARAMETERS
wq Write queue associated with the read queue to send the
M_IOCNAK on.
mp M_IOCTL message.
count Value to set the ioc_count of the iocblk(9S) to.
error Value to set the ioc_error of the iocblk(9S) to.
DESCRIPTION
The miocnak() function converts an M_IOCTL message into an M_IOCNAK
message and sends the resulting message upstream.
To convert the message, miocnak() changes the message type to M_IOCNAK,
sets the ioc_count and ioc_error members of the iocblk(9S) associated
with mp to the passed-in values, and clears the ioc_rval field. Since
payloads cannot currently be associated with M_IOCNAK messages, count
must always be zero. If error is passed as zero, EINVAL is assumed.
RETURN VALUES
None.
CONTEXT
This function can be called from user, kernel or interrupt context.
NOTES
Callers must not hold any locks across a miocnak() that can be acquired
as part of put(9E) processing.
SEE ALSOmioc2ack(9F), miocack(9F), put(9E), iocblk(9S)
STREAMS Programming Guide
SunOS 5.10 9 June 2004 miocnak(9F)
