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>

diff --git a/src/afs/DARWIN/osi_module.c b/src/afs/DARWIN/osi_module.c
index 020518bb01ac5dccc6685dfbf7bf79e56babe9be..f254ccf512662a246dd05e140a7b579bdc4bc355 100644 (file)
--- 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;