Ejemplo n.º 1
0
static struct ipc_namespace *create_ipc_ns(struct task_struct *tsk,
					   struct ipc_namespace *old_ns)
{
	struct ipc_namespace *ns;
	int err;

	ns = kmalloc(sizeof(struct ipc_namespace), GFP_KERNEL);
	if (ns == NULL)
		return ERR_PTR(-ENOMEM);

	atomic_set(&ns->count, 1);
	err = mq_init_ns(ns);
	if (err) {
		kfree(ns);
		return ERR_PTR(err);
	}
	atomic_inc(&nr_ipc_ns);

	sem_init_ns(ns);
	msg_init_ns(ns);
	shm_init_ns(ns);

	/*
	 * msgmni has already been computed for the new ipc ns.
	 * Thus, do the ipcns creation notification before registering that
	 * new ipcns in the chain.
	 */
	ipcns_notify(IPCNS_CREATED);
	register_ipcns_notifier(ns);

	ns->user_ns = get_user_ns(task_cred_xxx(tsk, user)->user_ns);

	return ns;
}
Ejemplo n.º 2
0
static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
					   struct ipc_namespace *old_ns)
{
	struct ipc_namespace *ns;
	int err;

	ns = kmalloc(sizeof(struct ipc_namespace), GFP_KERNEL);
	if (ns == NULL)
		return ERR_PTR(-ENOMEM);

	err = ns_alloc_inum(&ns->ns);
	if (err) {
		kfree(ns);
		return ERR_PTR(err);
	}
	ns->ns.ops = &ipcns_operations;

	atomic_set(&ns->count, 1);
	ns->user_ns = get_user_ns(user_ns);

	err = mq_init_ns(ns);
	if (err) {
		put_user_ns(ns->user_ns);
		ns_free_inum(&ns->ns);
		kfree(ns);
		return ERR_PTR(err);
	}

	sem_init_ns(ns);
	msg_init_ns(ns);
	shm_init_ns(ns);

	return ns;
}