22 	struct ipc_namespace *ns;  in create_ipc_ns()  local
25 	ns = kmalloc(sizeof(struct ipc_namespace), GFP_KERNEL);  in create_ipc_ns()
26 	if (ns == NULL)  in create_ipc_ns()
29 	err = ns_alloc_inum(&ns->ns);  in create_ipc_ns()
31 		kfree(ns);  in create_ipc_ns()
34 	ns->ns.ops = &ipcns_operations;  in create_ipc_ns()
36 	atomic_set(&ns->count, 1);  in create_ipc_ns()
37 	err = mq_init_ns(ns);  in create_ipc_ns()
39 		ns_free_inum(&ns->ns);  in create_ipc_ns()
40 		kfree(ns);  in create_ipc_ns()
45 	sem_init_ns(ns);  in create_ipc_ns()
46 	msg_init_ns(ns);  in create_ipc_ns()
47 	shm_init_ns(ns);  in create_ipc_ns()
49 	ns->user_ns = get_user_ns(user_ns);  in create_ipc_ns()
51 	return ns;  in create_ipc_ns()
55 	struct user_namespace *user_ns, struct ipc_namespace *ns)  in copy_ipcs()  argument
58 		return get_ipc_ns(ns);  in copy_ipcs()
59 	return create_ipc_ns(user_ns, ns);  in copy_ipcs()
70 void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids,  in free_ipcs()  argument
87 		free(ns, perm);  in free_ipcs()
93 static void free_ipc_ns(struct ipc_namespace *ns)  in free_ipc_ns()  argument
95 	sem_exit_ns(ns);  in free_ipc_ns()
96 	msg_exit_ns(ns);  in free_ipc_ns()
97 	shm_exit_ns(ns);  in free_ipc_ns()
100 	put_user_ns(ns->user_ns);  in free_ipc_ns()
101 	ns_free_inum(&ns->ns);  in free_ipc_ns()
102 	kfree(ns);  in free_ipc_ns()
121 void put_ipc_ns(struct ipc_namespace *ns)  in put_ipc_ns()  argument
123 	if (atomic_dec_and_lock(&ns->count, &mq_lock)) {  in put_ipc_ns()
124 		mq_clear_sbinfo(ns);  in put_ipc_ns()
126 		mq_put_mnt(ns);  in put_ipc_ns()
127 		free_ipc_ns(ns);  in put_ipc_ns()
131 static inline struct ipc_namespace *to_ipc_ns(struct ns_common *ns)  in to_ipc_ns()  argument
133 	return container_of(ns, struct ipc_namespace, ns);  in to_ipc_ns()
138 	struct ipc_namespace *ns = NULL;  in ipcns_get()  local
144 		ns = get_ipc_ns(nsproxy->ipc_ns);  in ipcns_get()
147 	return ns ? &ns->ns : NULL;  in ipcns_get()
150 static void ipcns_put(struct ns_common *ns)  in ipcns_put()  argument
152 	return put_ipc_ns(to_ipc_ns(ns));  in ipcns_put()
157 	struct ipc_namespace *ns = to_ipc_ns(new);  in ipcns_install()  local
158 	if (!ns_capable(ns->user_ns, CAP_SYS_ADMIN) ||  in ipcns_install()
165 	nsproxy->ipc_ns = get_ipc_ns(ns);  in ipcns_install()