59 static struct ucounts *inc_time_namespaces(struct user_namespace *ns)  in inc_time_namespaces()  argument
61 	return inc_ucount(ns, current_euid(), UCOUNT_TIME_NAMESPACES);  in inc_time_namespaces()
81 	struct time_namespace *ns;  in clone_time_ns()  local
91 	ns = kmalloc(sizeof(*ns), GFP_KERNEL_ACCOUNT);  in clone_time_ns()
92 	if (!ns)  in clone_time_ns()
95 	refcount_set(&ns->ns.count, 1);  in clone_time_ns()
97 	ns->vvar_page = alloc_page(GFP_KERNEL_ACCOUNT | __GFP_ZERO);  in clone_time_ns()
98 	if (!ns->vvar_page)  in clone_time_ns()
101 	err = ns_alloc_inum(&ns->ns);  in clone_time_ns()
105 	ns->ucounts = ucounts;  in clone_time_ns()
106 	ns->ns.ops = &timens_operations;  in clone_time_ns()
107 	ns->user_ns = get_user_ns(user_ns);  in clone_time_ns()
108 	ns->offsets = old_ns->offsets;  in clone_time_ns()
109 	ns->frozen_offsets = false;  in clone_time_ns()
110 	return ns;  in clone_time_ns()
113 	__free_page(ns->vvar_page);  in clone_time_ns()
115 	kfree(ns);  in clone_time_ns()
180 				   struct time_namespace *ns)  in timens_setup_vdso_data()  argument
183 	struct timens_offset monotonic = offset_from_ts(ns->offsets.monotonic);  in timens_setup_vdso_data()
184 	struct timens_offset boottime = offset_from_ts(ns->offsets.boottime);  in timens_setup_vdso_data()
202 				struct time_namespace *ns)  in timens_set_vvar_page()  argument
207 	if (ns == &init_time_ns)  in timens_set_vvar_page()
211 	if (likely(ns->frozen_offsets))  in timens_set_vvar_page()
216 	if (ns->frozen_offsets)  in timens_set_vvar_page()
219 	ns->frozen_offsets = true;  in timens_set_vvar_page()
220 	vdata = arch_get_vdso_data(page_address(ns->vvar_page));  in timens_set_vvar_page()
223 		timens_setup_vdso_data(&vdata[i], ns);  in timens_set_vvar_page()
229 void free_time_ns(struct time_namespace *ns)  in free_time_ns()  argument
231 	dec_time_namespaces(ns->ucounts);  in free_time_ns()
232 	put_user_ns(ns->user_ns);  in free_time_ns()
233 	ns_free_inum(&ns->ns);  in free_time_ns()
234 	__free_page(ns->vvar_page);  in free_time_ns()
235 	kfree(ns);  in free_time_ns()
238 static struct time_namespace *to_time_ns(struct ns_common *ns)  in to_time_ns()  argument
240 	return container_of(ns, struct time_namespace, ns);  in to_time_ns()
245 	struct time_namespace *ns = NULL;  in timens_get()  local
251 		ns = nsproxy->time_ns;  in timens_get()
252 		get_time_ns(ns);  in timens_get()
256 	return ns ? &ns->ns : NULL;  in timens_get()
261 	struct time_namespace *ns = NULL;  in timens_for_children_get()  local
267 		ns = nsproxy->time_ns_for_children;  in timens_for_children_get()
268 		get_time_ns(ns);  in timens_for_children_get()
272 	return ns ? &ns->ns : NULL;  in timens_for_children_get()
275 static void timens_put(struct ns_common *ns)  in timens_put()  argument
277 	put_time_ns(to_time_ns(ns));  in timens_put()
280 void timens_commit(struct task_struct *tsk, struct time_namespace *ns)  in timens_commit()  argument
282 	timens_set_vvar_page(tsk, ns);  in timens_commit()
283 	vdso_join_timens(tsk, ns);  in timens_commit()
289 	struct time_namespace *ns = to_time_ns(new);  in timens_install()  local
294 	if (!ns_capable(ns->user_ns, CAP_SYS_ADMIN) ||  in timens_install()
298 	get_time_ns(ns);  in timens_install()
300 	nsproxy->time_ns = ns;  in timens_install()
302 	get_time_ns(ns);  in timens_install()
304 	nsproxy->time_ns_for_children = ns;  in timens_install()
310 	struct ns_common *nsc = &nsproxy->time_ns_for_children->ns;  in timens_on_fork()
311 	struct time_namespace *ns = to_time_ns(nsc);  in timens_on_fork()  local
317 	get_time_ns(ns);  in timens_on_fork()
319 	nsproxy->time_ns = ns;  in timens_on_fork()
321 	timens_commit(tsk, ns);  in timens_on_fork()
324 static struct user_namespace *timens_owner(struct ns_common *ns)  in timens_owner()  argument
326 	return to_time_ns(ns)->user_ns;  in timens_owner()
349 	struct ns_common *ns;  in proc_timens_show_offsets()  local
352 	ns = timens_for_children_get(p);  in proc_timens_show_offsets()
353 	if (!ns)  in proc_timens_show_offsets()
355 	time_ns = to_time_ns(ns);  in proc_timens_show_offsets()
365 	struct ns_common *ns;  in proc_timens_set_offset()  local
370 	ns = timens_for_children_get(p);  in proc_timens_set_offset()
371 	if (!ns)  in proc_timens_set_offset()
373 	time_ns = to_time_ns(ns);  in proc_timens_set_offset()
462 	.ns.count	= REFCOUNT_INIT(3),
464 	.ns.inum	= PROC_TIME_INIT_INO,
465 	.ns.ops		= &timens_operations,