[PATCH] namespaces: incorporate fs namespace into nsproxy
This moves the mount namespace into the nsproxy. The mount namespace count
now refers to the number of nsproxies point to it, rather than the number of
tasks. As a result, the unshare_namespace() function in kernel/fork.c no
longer checks whether it is being shared.
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Andrey Savochkin <saw@sw.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/namespace.h b/include/linux/namespace.h
index 3abc8e3..d137009 100644
--- a/include/linux/namespace.h
+++ b/include/linux/namespace.h
@@ -4,6 +4,7 @@
#include <linux/mount.h>
#include <linux/sched.h>
+#include <linux/nsproxy.h>
struct namespace {
atomic_t count;
@@ -26,11 +27,8 @@
static inline void exit_namespace(struct task_struct *p)
{
- struct namespace *namespace = p->namespace;
+ struct namespace *namespace = p->nsproxy->namespace;
if (namespace) {
- task_lock(p);
- p->namespace = NULL;
- task_unlock(p);
put_namespace(namespace);
}
}