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[PATCH] namespaces: incorporate fs namespace into nsproxy

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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>
This commit is contained in:
Serge E. Hallyn
2006-10-02 02:18:08 -07:00
committed by Linus Torvalds
parent 0437eb594e
commit 1651e14e28
9 changed files with 55 additions and 39 deletions
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6
include/linux/namespace.h
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@@ -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 put_namespace(struct namespace *namespace)
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);
}
}