Second of several commits to allow kernel System V IPC data structures

to be modified and extended without breaking the user space ABI:

Use _kernel variants on _ds structures for System V sempahores, message
queues, and shared memory.  When interfacing with userspace, export
only the _ds subsets of the _kernel data structures.  A lot of search
and replace.

Define the message structure in the _KERNEL portion of msg.h so that it
can be used by other kernel consumers, but not exposed to user space.

Submitted by:	Dandekar Hrishikesh <rishi_dandekar at sbcglobal dot net>
Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, SPAWAR, McAfee Research

1 files changed, 9 insertions, 0 deletions

diff --git a/sys/sys/msg.h b/sys/sys/msg.h
index fa058e1..53d1047 100644
--- a/sys/sys/msg.h
+++ b/sys/sys/msg.h
@@ -100,6 +100,15 @@ struct mymsg {
 
 #ifdef _KERNEL
 
+struct msg {
+	struct	msg *msg_next;  /* next msg in the chain */
+	long	msg_type; 	/* type of this message */
+				/* >0 -> type of this message */
+				/* 0 -> free header */
+	u_short	msg_ts;		/* size of this message */
+	short	msg_spot;	/* location of start of msg in buffer */
+};
+
 /*
  * Based on the configuration parameters described in an SVR2 (yes, two)
  * config(1m) man page.