Content-type: text/html Man page of mcopyin

mcopyin

Section: Kernel Functions for Drivers (9F)
Updated: 9 June 2004
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NAME

mcopyin - 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 copyreq(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 ALSO

mcopyout(9F), copyreq(9S)

STREAMS Programming Guide


 

Index

NAME
SYNOPSIS
INTERFACE LEVEL
PARAMETERS
DESCRIPTION
RETURN VALUES
CONTEXT
SEE ALSO

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Time: 02:39:37 GMT, October 02, 2010