mcopyin(9F) Kernel Functions for Drivers mcopyin(9F)NAMEmcopyin - Convert an M_IOCTL or M_IOCDATA message to an M_COPYIN
SYNOPSIS
#include <sys/stream.h>
#include <sys/strsun.h>
void mcopyin(mblk_t *mp, void *private, size_t size,
void * useraddr);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
PARAMETERS
mp M_IOCTL or M_IOCDATA message.
private Value to which the cq_private field of copyreq(9S) is set.
size Value to which the cq_size field of copyreq(9S) is set.
useraddr Optionally, the value to which the cq_addr field of copy‐
req(9S) is set.
DESCRIPTION
The mcopyin() function converts an M_IOCTL or M_IOCDATA message into an
M_COPYIN message using the supplied arguments.
To convert the message, mcopyin() changes the message type to M_COPYIN,
and its payload from a iocblk(9S) to a copyreq(9S). Since the
iocblk(9S) and copyreq(9S) are designed to overlay one another, the
only fields which must be updated are cq_private, cq_size, and cq_addr,
which are set to the supplied values. If useraddr is passed as NULL, mp
must be a transparent M_IOCTL, and cq_addr is assigned the pointer-
sized quantity found at mp->b_cont->b_rptr.
Any trailing message blocks associated with mp are freed.
RETURN VALUES
None.
CONTEXT
This function can be called from user, kernel or interrupt context.
SEE ALSOmcopyout(9F), copyreq(9S)
STREAMS Programming Guide
SunOS 5.11 9 June 2004 mcopyin(9F)
