43 struct dev_cgroup {  struct
49 static inline struct dev_cgroup *css_to_devcgroup(struct cgroup_subsys_state *s)  in css_to_devcgroup()  argument
51 	return s ? container_of(s, struct dev_cgroup, css) : NULL;  in css_to_devcgroup()
54 static inline struct dev_cgroup *task_devcgroup(struct task_struct *task)  in task_devcgroup()
88 static int dev_exception_add(struct dev_cgroup *dev_cgroup,  in dev_exception_add()  argument
99 	list_for_each_entry(walk, &dev_cgroup->exceptions, list) {  in dev_exception_add()
113 		list_add_tail_rcu(&excopy->list, &dev_cgroup->exceptions);  in dev_exception_add()
120 static void dev_exception_rm(struct dev_cgroup *dev_cgroup,  in dev_exception_rm()  argument
127 	list_for_each_entry_safe(walk, tmp, &dev_cgroup->exceptions, list) {  in dev_exception_rm()
143 static void __dev_exception_clean(struct dev_cgroup *dev_cgroup)  in __dev_exception_clean()  argument
147 	list_for_each_entry_safe(ex, tmp, &dev_cgroup->exceptions, list) {  in __dev_exception_clean()
159 static void dev_exception_clean(struct dev_cgroup *dev_cgroup)  in dev_exception_clean()  argument
163 	__dev_exception_clean(dev_cgroup);  in dev_exception_clean()
166 static inline bool is_devcg_online(const struct dev_cgroup *devcg)  in is_devcg_online()
179 	struct dev_cgroup *dev_cgroup = css_to_devcgroup(css);  in devcgroup_online()  local
180 	struct dev_cgroup *parent_dev_cgroup = css_to_devcgroup(css->parent);  in devcgroup_online()
186 		dev_cgroup->behavior = DEVCG_DEFAULT_ALLOW;  in devcgroup_online()
188 		ret = dev_exceptions_copy(&dev_cgroup->exceptions,  in devcgroup_online()
191 			dev_cgroup->behavior = parent_dev_cgroup->behavior;  in devcgroup_online()
200 	struct dev_cgroup *dev_cgroup = css_to_devcgroup(css);  in devcgroup_offline()  local
203 	dev_cgroup->behavior = DEVCG_DEFAULT_NONE;  in devcgroup_offline()
213 	struct dev_cgroup *dev_cgroup;  in devcgroup_css_alloc()  local
215 	dev_cgroup = kzalloc(sizeof(*dev_cgroup), GFP_KERNEL);  in devcgroup_css_alloc()
216 	if (!dev_cgroup)  in devcgroup_css_alloc()
218 	INIT_LIST_HEAD(&dev_cgroup->exceptions);  in devcgroup_css_alloc()
219 	dev_cgroup->behavior = DEVCG_DEFAULT_NONE;  in devcgroup_css_alloc()
221 	return &dev_cgroup->css;  in devcgroup_css_alloc()
226 	struct dev_cgroup *dev_cgroup = css_to_devcgroup(css);  in devcgroup_css_free()  local
228 	__dev_exception_clean(dev_cgroup);  in devcgroup_css_free()
229 	kfree(dev_cgroup);  in devcgroup_css_free()
272 	struct dev_cgroup *devcgroup = css_to_devcgroup(seq_css(m));  in devcgroup_seq_show()
393 static bool verify_new_ex(struct dev_cgroup *dev_cgroup,  in verify_new_ex()  argument
403 	if (dev_cgroup->behavior == DEVCG_DEFAULT_ALLOW) {  in verify_new_ex()
416 			match = match_exception_partial(&dev_cgroup->exceptions,  in verify_new_ex()
433 		match = match_exception(&dev_cgroup->exceptions, refex->type,  in verify_new_ex()
451 static int parent_has_perm(struct dev_cgroup *childcg,  in parent_has_perm()
454 	struct dev_cgroup *parent = css_to_devcgroup(childcg->css.parent);  in parent_has_perm()
472 static bool parent_allows_removal(struct dev_cgroup *childcg,  in parent_allows_removal()
475 	struct dev_cgroup *parent = css_to_devcgroup(childcg->css.parent);  in parent_allows_removal()
498 static inline int may_allow_all(struct dev_cgroup *parent)  in may_allow_all()
518 static void revalidate_active_exceptions(struct dev_cgroup *devcg)  in revalidate_active_exceptions()
537 static int propagate_exception(struct dev_cgroup *devcg_root,  in propagate_exception()
546 		struct dev_cgroup *devcg = css_to_devcgroup(pos);  in propagate_exception()
599 static int devcgroup_update_access(struct dev_cgroup *devcgroup,  in devcgroup_update_access()
606 	struct dev_cgroup *parent = css_to_devcgroup(devcgroup->css.parent);  in devcgroup_update_access()
811 	struct dev_cgroup *dev_cgroup;  in devcgroup_legacy_check_permission()  local
815 	dev_cgroup = task_devcgroup(current);  in devcgroup_legacy_check_permission()
816 	if (dev_cgroup->behavior == DEVCG_DEFAULT_ALLOW)  in devcgroup_legacy_check_permission()
818 		rc = !match_exception_partial(&dev_cgroup->exceptions,  in devcgroup_legacy_check_permission()
822 		rc = match_exception(&dev_cgroup->exceptions, type, major,  in devcgroup_legacy_check_permission()