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authorSerge E. Hallyn <serue@us.ibm.com>2010-05-03 16:23:15 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2010-05-21 09:37:31 -0700
commitbe867b194a3ae3c680c29521287ae49b4d44d420 (patch)
tree1b3ad125d02603c6a9cc4bb8ae518695d7c6a66d /lib/kobject.c
parentf349cf34731c3b3eddbcd63cb04489aee2c405bd (diff)
downloadlinux-be867b194a3ae3c680c29521287ae49b4d44d420.tar.gz
sysfs: Comment sysfs directory tagging logic
Add some in-line comments to explain the new infrastructure, which was introduced to support sysfs directory tagging with namespaces. I think an overall description someplace might be good too, but it didn't really seem to fit into Documentation/filesystems/sysfs.txt, which appears more geared toward users, rather than maintainers, of sysfs. (Tejun, please let me know if I can make anything clearer or failed altogether to comment something that should be commented.) Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'lib/kobject.c')
-rw-r--r--lib/kobject.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/kobject.c b/lib/kobject.c
index b2c6d1f56e6..f07c57252e8 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -948,6 +948,17 @@ const void *kobj_ns_initial(enum kobj_ns_type type)
return ns;
}
+/*
+ * kobj_ns_exit - invalidate a namespace tag
+ *
+ * @type: the namespace type (i.e. KOBJ_NS_TYPE_NET)
+ * @ns: the actual namespace being invalidated
+ *
+ * This is called when a tag is no longer valid. For instance,
+ * when a network namespace exits, it uses this helper to
+ * make sure no sb's sysfs_info points to the now-invalidated
+ * netns.
+ */
void kobj_ns_exit(enum kobj_ns_type type, const void *ns)
{
sysfs_exit_ns(type, ns);