PERFORCE change 136825 for review

[Robert Watson]

http://perforce.freebsd.org/chv.cgi?CH=136825

Change 136825 by rwatson at rwatson_freebsd_capabilities on 2008/03/04 16:32:15

	Add a comment to uipc_usrreq.c relating to UNIX domain socket GC in
	the capabilities world order.

Affected files ...

.. //depot/projects/trustedbsd/capabilities/src/sys/kern/uipc_usrreq.c#2 edit

Differences ...

==== //depot/projects/trustedbsd/capabilities/src/sys/kern/uipc_usrreq.c#2 (text+ko) ====

@@ -1939,6 +1939,11 @@
 	 * Check for a socket potentially in a cycle.  It must be in a
 	 * queue as indicated by msgcount, and this must equal the file
 	 * reference count.  Note that when msgcount is 0 the file is NULL.
+	 *
+	 * XXXRW: This will need to change to also look at the capabilities
+	 * referencing the file descriptor.  It must: (a) subtract the number
+	 * of capability references, and (b) add the non-message references
+	 * to the capabilities themselves.
 	 */
 	if ((unp->unp_gcflag & UNPGC_REF) == 0 && fp &&
 	    unp->unp_msgcount != 0 && fp->f_count == unp->unp_msgcount) {