[src/trunk]: src/sys/dev/scsipi Prevent detaching an open device unless forced.

[hannken <hannken%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/41fc4bc79c07
branches:  trunk
changeset: 330500:41fc4bc79c07
user:      hannken <hannken%NetBSD.org@localhost>
date:      Sat Jul 12 12:13:01 2014 +0000

description:
Prevent detaching an open device unless forced.

diffstat:

 sys/dev/scsipi/cd.c |  7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diffs (28 lines):

diff -r 71405ecdd06c -r 41fc4bc79c07 sys/dev/scsipi/cd.c
--- a/sys/dev/scsipi/cd.c       Sat Jul 12 12:11:22 2014 +0000
+++ b/sys/dev/scsipi/cd.c       Sat Jul 12 12:13:01 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cd.c,v 1.319 2014/04/18 06:23:32 martin Exp $  */
+/*     $NetBSD: cd.c,v 1.320 2014/07/12 12:13:01 hannken Exp $ */
 
 /*-
  * Copyright (c) 1998, 2001, 2003, 2004, 2005, 2008 The NetBSD Foundation,
@@ -50,7 +50,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cd.c,v 1.319 2014/04/18 06:23:32 martin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cd.c,v 1.320 2014/07/12 12:13:01 hannken Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -313,6 +313,9 @@
        struct cd_softc *cd = device_private(self);
        int s, bmaj, cmaj, i, mn;
 
+       if (cd->sc_dk.dk_openmask != 0 && (flags & DETACH_FORCE) == 0)
+               return EBUSY;
+
        /* locate the major number */
        bmaj = bdevsw_lookup_major(&cd_bdevsw);
        cmaj = cdevsw_lookup_major(&cd_cdevsw);