From a08f9baa7620a6643f12f0b847c2bbab41a0b255 Mon Sep 17 00:00:00 2001
From: Derrick Brashear <shadow@dementix.org>
Date: Wed, 18 Apr 2012 11:58:03 -0400
Subject: [PATCH] macos: lock module against unload during shutdown

during shutdown, once umount finished, it was possible to
unload the module before shutdown completed. fix that.

Change-Id: I7eae5210ec9553fa862d96148f963dcdfee79c4b
Reviewed-on: http://gerrit.openafs.org/7245
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Chas Williams - CONTRACTOR <chas@cmf.nrl.navy.mil>
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Tested-by: Derrick Brashear <shadow@dementix.org>
---
 src/afs/DARWIN/osi_module.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/afs/DARWIN/osi_module.c b/src/afs/DARWIN/osi_module.c
index 020518bb01..f254ccf512 100644
--- a/src/afs/DARWIN/osi_module.c
+++ b/src/afs/DARWIN/osi_module.c
@@ -115,6 +115,8 @@ afs_modunload(struct kmod_info * kmod_info, void *data)
 {
     if (afs_globalVFS)
 	return KERN_FAILURE;
+    if ((afs_initState != 0) || (afs_shuttingdown))
+	return KERN_FAILURE;
 #ifdef AFS_DARWIN80_ENV
     if (vfs_fsremove(afs_vfstable))
 	return KERN_FAILURE;