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authorCedric Le Goater <clg@fr.ibm.com>2006-12-08 02:37:59 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-08 08:28:52 -0800
commit9a575a92db3312a40cdf0b0406d88de88ad9741e (patch)
tree0b789528da13cd31f7fb206f184cfa123cc0ba42 /kernel/pid.c
parent61a58c6c238cc81f7742b8cc84212cc55fb57747 (diff)
[PATCH] to nsproxy
Add the pid namespace framework to the nsproxy object. The copy of the pid namespace only increases the refcount on the global pid namespace, init_pid_ns, and unshare is not implemented. There is no configuration option to activate or deactivate this feature because this not relevant for the moment. Signed-off-by: Cedric Le Goater <clg@fr.ibm.com> Cc: Kirill Korotaev <dev@openvz.org> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/pid.c')
-rw-r--r--kernel/pid.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/pid.c b/kernel/pid.c
index 25807e1b98d..5319b9f2fc5 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -59,6 +59,9 @@ static inline int mk_pid(struct pid_namespace *pid_ns,
* the scheme scales to up to 4 million PIDs, runtime.
*/
struct pid_namespace init_pid_ns = {
+ .kref = {
+ .refcount = ATOMIC_INIT(2),
+ },
.pidmap = {
[ 0 ... PIDMAP_ENTRIES-1] = { ATOMIC_INIT(BITS_PER_PAGE), NULL }
},
@@ -356,6 +359,26 @@ struct pid *find_ge_pid(int nr)
}
EXPORT_SYMBOL_GPL(find_get_pid);
+int copy_pid_ns(int flags, struct task_struct *tsk)
+{
+ struct pid_namespace *old_ns = tsk->nsproxy->pid_ns;
+ int err = 0;
+
+ if (!old_ns)
+ return 0;
+
+ get_pid_ns(old_ns);
+ return err;
+}
+
+void free_pid_ns(struct kref *kref)
+{
+ struct pid_namespace *ns;
+
+ ns = container_of(kref, struct pid_namespace, kref);
+ kfree(ns);
+}
+
/*
* The pid hash table is scaled according to the amount of memory in the
* machine. From a minimum of 16 slots up to 4096 slots at one gigabyte or