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()
99 static int dev_exception_add(struct dev_cgroup *dev_cgroup,  in dev_exception_add()  argument
110 	list_for_each_entry(walk, &dev_cgroup->exceptions, list) {  in dev_exception_add()
124 		list_add_tail_rcu(&excopy->list, &dev_cgroup->exceptions);  in dev_exception_add()
131 static void dev_exception_rm(struct dev_cgroup *dev_cgroup,  in dev_exception_rm()  argument
138 	list_for_each_entry_safe(walk, tmp, &dev_cgroup->exceptions, list) {  in dev_exception_rm()
154 static void __dev_exception_clean(struct dev_cgroup *dev_cgroup)  in __dev_exception_clean()  argument
158 	list_for_each_entry_safe(ex, tmp, &dev_cgroup->exceptions, list) {  in __dev_exception_clean()
170 static void dev_exception_clean(struct dev_cgroup *dev_cgroup)  in dev_exception_clean()  argument
174 	__dev_exception_clean(dev_cgroup);  in dev_exception_clean()
177 static inline bool is_devcg_online(const struct dev_cgroup *devcg)  in is_devcg_online()
190 	struct dev_cgroup *dev_cgroup = css_to_devcgroup(css);  in devcgroup_online()  local
191 	struct dev_cgroup *parent_dev_cgroup = css_to_devcgroup(css->parent);  in devcgroup_online()
197 		dev_cgroup->behavior = DEVCG_DEFAULT_ALLOW;  in devcgroup_online()
199 		ret = dev_exceptions_copy(&dev_cgroup->exceptions,  in devcgroup_online()
202 			dev_cgroup->behavior = parent_dev_cgroup->behavior;  in devcgroup_online()
211 	struct dev_cgroup *dev_cgroup = css_to_devcgroup(css);  in devcgroup_offline()  local
214 	dev_cgroup->behavior = DEVCG_DEFAULT_NONE;  in devcgroup_offline()
224 	struct dev_cgroup *dev_cgroup;  in devcgroup_css_alloc()  local
226 	dev_cgroup = kzalloc(sizeof(*dev_cgroup), GFP_KERNEL);  in devcgroup_css_alloc()
227 	if (!dev_cgroup)  in devcgroup_css_alloc()
229 	INIT_LIST_HEAD(&dev_cgroup->exceptions);  in devcgroup_css_alloc()
230 	dev_cgroup->behavior = DEVCG_DEFAULT_NONE;  in devcgroup_css_alloc()
232 	return &dev_cgroup->css;  in devcgroup_css_alloc()
237 	struct dev_cgroup *dev_cgroup = css_to_devcgroup(css);  in devcgroup_css_free()  local
239 	__dev_exception_clean(dev_cgroup);  in devcgroup_css_free()
240 	kfree(dev_cgroup);  in devcgroup_css_free()
283 	struct dev_cgroup *devcgroup = css_to_devcgroup(seq_css(m));  in devcgroup_seq_show()
404 static bool verify_new_ex(struct dev_cgroup *dev_cgroup,  in verify_new_ex()  argument
414 	if (dev_cgroup->behavior == DEVCG_DEFAULT_ALLOW) {  in verify_new_ex()
427 			match = match_exception_partial(&dev_cgroup->exceptions,  in verify_new_ex()
444 		match = match_exception(&dev_cgroup->exceptions, refex->type,  in verify_new_ex()
462 static int parent_has_perm(struct dev_cgroup *childcg,  in parent_has_perm()
465 	struct dev_cgroup *parent = css_to_devcgroup(childcg->css.parent);  in parent_has_perm()
483 static bool parent_allows_removal(struct dev_cgroup *childcg,  in parent_allows_removal()
486 	struct dev_cgroup *parent = css_to_devcgroup(childcg->css.parent);  in parent_allows_removal()
509 static inline int may_allow_all(struct dev_cgroup *parent)  in may_allow_all()
529 static void revalidate_active_exceptions(struct dev_cgroup *devcg)  in revalidate_active_exceptions()
548 static int propagate_exception(struct dev_cgroup *devcg_root,  in propagate_exception()
557 		struct dev_cgroup *devcg = css_to_devcgroup(pos);  in propagate_exception()
610 static int devcgroup_update_access(struct dev_cgroup *devcgroup,  in devcgroup_update_access()
617 	struct dev_cgroup *parent = css_to_devcgroup(devcgroup->css.parent);  in devcgroup_update_access()
618 	struct dev_cgroup tmp_devcgrp;  in devcgroup_update_access()
835 	struct dev_cgroup *dev_cgroup;  in devcgroup_legacy_check_permission()  local
839 	dev_cgroup = task_devcgroup(current);  in devcgroup_legacy_check_permission()
840 	if (dev_cgroup->behavior == DEVCG_DEFAULT_ALLOW)  in devcgroup_legacy_check_permission()
842 		rc = !match_exception_partial(&dev_cgroup->exceptions,  in devcgroup_legacy_check_permission()
846 		rc = match_exception(&dev_cgroup->exceptions, type, major,  in devcgroup_legacy_check_permission()