copyreq(9S) Data Structures for Drivers copyreq(9S)NAME
copyreq - STREAMS data structure for the M_COPYIN and the M_COPYOUT message types
SYNOPSIS
#include <sys/stream.h>
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI)
DESCRIPTION
The data structure for the M_COPYIN and the M_COPYOUT message types.
STRUCTURE MEMBERS
int cq_cmd; /* ioctl command (from ioc_cmd) */
cred_t *cq_cr; /* full credentials */
uint_t cq_id; /* ioctl id (from ioc_id) */
uint_t cq_flag; /* must be zero */
mblk_t *cq_private; /* private state information */
caddr_t cq_addr; /* address to copy data to/from */
size_t cq_size; /* number of bytes to copy */
SEE ALSO
STREAMS Programming Guide
SunOS 5.11 6 October 2000 copyreq(9S)
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mcopyout(9F) Kernel Functions for Drivers mcopyout(9F)NAME
mcopyout - Convert an M_IOCTL or M_IOCDATA message to an M_COPYOUT
SYNOPSIS
#include <sys/stream.h>
#include <sys/strsun.h>
void mcopyout(mblk_t *mp, void *private, size_t size, void *useraddr, mblk_t *dp);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
PARAMETERS
mp M_IOCTL or M_IOCDATA message.
private Value to set the cq_private field of the copyreq(9S) to.
size Value to set the cq_size field of the copyreq(9S) to.
useraddr Optionally, the value to set the cq_addr field of the copyreq(9S) to.
dp Optionally, the payload to copy out.
DESCRIPTION
The mcopyout() function converts an M_IOCTL or M_IOCDATA message into an M_COPYOUT message using the supplied arguments.
To convert the message, mcopyout() changes the message type to M_COPYOUT, 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, the M_IOCTL must be transparent and cq_addr is assigned the pointer-
sized quantity found at mp->b_cont->b_rptr.
If dp is not NULL, any trailing message blocks associated with mp are freed, mp->b_cont is reset to dp and dp->b_wptr is set to dp->b_rptr
+ size. Otherwise, any trailing message blocks are unaffected.
RETURN VALUES
None.
CONTEXT
This function can be called from user, kernel or interrupt context.
SEE ALSO mcopyin(9F), copyreq(9S), iocblk(9S)
STREAMS Programming Guide
SunOS 5.10 9 June 2004 mcopyout(9F)