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authorAlexey Dobriyan <adobriyan@gmail.com>2009-06-17 16:27:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-18 13:03:55 -0700
commited469a63c37a996fa2c7041d2dc980715707902c (patch)
treea81bb7ff48cf56a10facf949407a28eb9e5961ea /kernel
parent17f98dcf6010a1cfd25d179fd0ce77d3dc2685c3 (diff)
downloadlinux-2.6.34-ux500-ed469a63c37a996fa2c7041d2dc980715707902c.tar.gz
pidns: make create_pid_namespace() accept parent pidns
create_pid_namespace() creates everything, but caller has to assign parent pidns by hand, which is unnatural. At the moment of call new ->level has to be taken from somewhere and parent pidns is already available. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Acked-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/pid_namespace.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 2d1001b4858..495d5dea22b 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -67,9 +67,10 @@ err_alloc:
return NULL;
}
-static struct pid_namespace *create_pid_namespace(unsigned int level)
+static struct pid_namespace *create_pid_namespace(struct pid_namespace *parent_pid_ns)
{
struct pid_namespace *ns;
+ unsigned int level = parent_pid_ns->level + 1;
int i;
ns = kmem_cache_zalloc(pid_ns_cachep, GFP_KERNEL);
@@ -86,6 +87,7 @@ static struct pid_namespace *create_pid_namespace(unsigned int level)
kref_init(&ns->kref);
ns->level = level;
+ ns->parent = get_pid_ns(parent_pid_ns);
set_bit(0, ns->pidmap[0].page);
atomic_set(&ns->pidmap[0].nr_free, BITS_PER_PAGE - 1);
@@ -125,9 +127,7 @@ struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *old
if (flags & CLONE_THREAD)
goto out_put;
- new_ns = create_pid_namespace(old_ns->level + 1);
- if (!IS_ERR(new_ns))
- new_ns->parent = get_pid_ns(old_ns);
+ new_ns = create_pid_namespace(old_ns);
out_put:
put_pid_ns(old_ns);