28 static struct ucounts *inc_ipc_namespaces(struct user_namespace *ns)  in inc_ipc_namespaces()  argument
30 	return inc_ucount(ns, current_euid(), UCOUNT_IPC_NAMESPACES);  in inc_ipc_namespaces()
41 	struct ipc_namespace *ns;  in create_ipc_ns()  local
60 	ns = kzalloc(sizeof(struct ipc_namespace), GFP_KERNEL_ACCOUNT);  in create_ipc_ns()
61 	if (ns == NULL)  in create_ipc_ns()
64 	err = ns_alloc_inum(&ns->ns);  in create_ipc_ns()
67 	ns->ns.ops = &ipcns_operations;  in create_ipc_ns()
69 	refcount_set(&ns->ns.count, 1);  in create_ipc_ns()
70 	ns->user_ns = get_user_ns(user_ns);  in create_ipc_ns()
71 	ns->ucounts = ucounts;  in create_ipc_ns()
73 	err = mq_init_ns(ns);  in create_ipc_ns()
78 	if (!setup_mq_sysctls(ns))  in create_ipc_ns()
81 	if (!setup_ipc_sysctls(ns))  in create_ipc_ns()
84 	err = msg_init_ns(ns);  in create_ipc_ns()
88 	sem_init_ns(ns);  in create_ipc_ns()
89 	shm_init_ns(ns);  in create_ipc_ns()
91 	return ns;  in create_ipc_ns()
94 	retire_mq_sysctls(ns);  in create_ipc_ns()
97 	put_user_ns(ns->user_ns);  in create_ipc_ns()
98 	ns_free_inum(&ns->ns);  in create_ipc_ns()
100 	kfree(ns);  in create_ipc_ns()
108 	struct user_namespace *user_ns, struct ipc_namespace *ns)  in copy_ipcs()  argument
111 		return get_ipc_ns(ns);  in copy_ipcs()
112 	return create_ipc_ns(user_ns, ns);  in copy_ipcs()
123 void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids,  in free_ipcs()  argument
140 		free(ns, perm);  in free_ipcs()
146 static void free_ipc_ns(struct ipc_namespace *ns)  in free_ipc_ns()  argument
152 	mntput(ns->mq_mnt);  in free_ipc_ns()
153 	sem_exit_ns(ns);  in free_ipc_ns()
154 	msg_exit_ns(ns);  in free_ipc_ns()
155 	shm_exit_ns(ns);  in free_ipc_ns()
157 	retire_mq_sysctls(ns);  in free_ipc_ns()
158 	retire_ipc_sysctls(ns);  in free_ipc_ns()
160 	dec_ipc_namespaces(ns->ucounts);  in free_ipc_ns()
161 	put_user_ns(ns->user_ns);  in free_ipc_ns()
162 	ns_free_inum(&ns->ns);  in free_ipc_ns()
163 	kfree(ns);  in free_ipc_ns()
198 void put_ipc_ns(struct ipc_namespace *ns)  in put_ipc_ns()  argument
200 	if (refcount_dec_and_lock(&ns->ns.count, &mq_lock)) {  in put_ipc_ns()
201 		mq_clear_sbinfo(ns);  in put_ipc_ns()
204 		if (llist_add(&ns->mnt_llist, &free_ipc_list))  in put_ipc_ns()
209 static inline struct ipc_namespace *to_ipc_ns(struct ns_common *ns)  in to_ipc_ns()  argument
211 	return container_of(ns, struct ipc_namespace, ns);  in to_ipc_ns()
216 	struct ipc_namespace *ns = NULL;  in ipcns_get()  local
222 		ns = get_ipc_ns(nsproxy->ipc_ns);  in ipcns_get()
225 	return ns ? &ns->ns : NULL;  in ipcns_get()
228 static void ipcns_put(struct ns_common *ns)  in ipcns_put()  argument
230 	return put_ipc_ns(to_ipc_ns(ns));  in ipcns_put()
236 	struct ipc_namespace *ns = to_ipc_ns(new);  in ipcns_install()  local
237 	if (!ns_capable(ns->user_ns, CAP_SYS_ADMIN) ||  in ipcns_install()
242 	nsproxy->ipc_ns = get_ipc_ns(ns);  in ipcns_install()
246 static struct user_namespace *ipcns_owner(struct ns_common *ns)  in ipcns_owner()  argument
248 	return to_ipc_ns(ns)->user_ns;  in ipcns_owner()