From 87bc328d6333dbf53b3ff295b967aaece440567a Mon Sep 17 00:00:00 2001
From: Bryan Drewery <bdrewery@FreeBSD.org>
Date: Tue, 15 Apr 2014 14:41:41 +0000
Subject: [PATCH] Make g_access() KASSERT() more useful.

Sponsored by:	EMC / Isilon Storage Division
Obtained from:	Isilon OneFS
MFC after:	2 weeks
---
 sys/geom/geom_subr.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sys/geom/geom_subr.c b/sys/geom/geom_subr.c
index dd8c4ab2ab2..6793373c09d 100644
--- a/sys/geom/geom_subr.c
+++ b/sys/geom/geom_subr.c
@@ -912,8 +912,9 @@ g_access(struct g_consumer *cp, int dcr, int dcw, int dce)
 
 	error = pp->geom->access(pp, dcr, dcw, dce);
 	KASSERT(dcr > 0 || dcw > 0 || dce > 0 || error == 0,
-	    ("Geom provider %s::%s failed closing ->access()",
-	    pp->geom->class->name, pp->name));
+	    ("Geom provider %s::%s dcr=%d dcw=%d dce=%d error=%d failed "
+	    "closing ->access()", pp->geom->class->name, pp->name, dcr, dcw,
+	    dce, error));
 	if (!error) {
 		/*
 		 * If we open first write, spoil any partner consumers.