212 static int cgroup_apply_control(struct cgroup *cgrp);
213 static void cgroup_finalize_control(struct cgroup *cgrp, int ret);
216 static int cgroup_destroy_locked(struct cgroup *cgrp);
217 static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,
222 			      struct cgroup *cgrp, struct cftype cfts[],
291 bool cgroup_on_dfl(const struct cgroup *cgrp)  in cgroup_on_dfl()
327 static bool cgroup_has_tasks(struct cgroup *cgrp)  in cgroup_has_tasks()
332 bool cgroup_is_threaded(struct cgroup *cgrp)  in cgroup_is_threaded()
338 static bool cgroup_is_mixable(struct cgroup *cgrp)  in cgroup_is_mixable()
349 static bool cgroup_can_be_thread_root(struct cgroup *cgrp)  in cgroup_can_be_thread_root()
371 bool cgroup_is_thread_root(struct cgroup *cgrp)  in cgroup_is_thread_root()
393 static bool cgroup_is_valid_domain(struct cgroup *cgrp)  in cgroup_is_valid_domain()
411 static u16 cgroup_control(struct cgroup *cgrp)  in cgroup_control()
413 	struct cgroup *parent = cgroup_parent(cgrp);  in cgroup_control()
432 static u16 cgroup_ss_mask(struct cgroup *cgrp)  in cgroup_ss_mask()
434 	struct cgroup *parent = cgroup_parent(cgrp);  in cgroup_ss_mask()
459 static struct cgroup_subsys_state *cgroup_css(struct cgroup *cgrp,  in cgroup_css()
477 static struct cgroup_subsys_state *cgroup_tryget_css(struct cgroup *cgrp,  in cgroup_tryget_css()
501 static struct cgroup_subsys_state *cgroup_e_css_by_mask(struct cgroup *cgrp,  in cgroup_e_css_by_mask()
535 struct cgroup_subsys_state *cgroup_e_css(struct cgroup *cgrp,  in cgroup_e_css()
562 struct cgroup_subsys_state *cgroup_get_e_css(struct cgroup *cgrp,  in cgroup_get_e_css()
584 static void cgroup_get_live(struct cgroup *cgrp)  in cgroup_get_live()
595 int __cgroup_task_count(const struct cgroup *cgrp)  in __cgroup_task_count()
612 int cgroup_task_count(const struct cgroup *cgrp)  in cgroup_task_count()
625 	struct cgroup *cgrp = of->kn->parent->priv;  in of_css()
709 		       (dsct) = (d_css)->cgroup;			\
718 		       (dsct) = (d_css)->cgroup;			\
791 static void cgroup_update_populated(struct cgroup *cgrp, bool populated)  in cgroup_update_populated()
793 	struct cgroup *child = NULL;  in cgroup_update_populated()
975 			     struct cgroup *new_cgrp,  in compare_css_sets()
978 	struct cgroup *new_dfl_cgrp;  in compare_css_sets()
1009 		struct cgroup *cgrp1, *cgrp2;  in compare_css_sets()
1053 					struct cgroup *cgrp,  in find_existing_css_set()
1139 			 struct cgroup *cgrp)  in link_css_set()
1172 				    struct cgroup *cgrp)  in find_css_set()
1224 		struct cgroup *c = link->cgrp;  in find_css_set()
1243 			      &css->cgroup->e_csets[ssid]);  in find_css_set()
1276 	struct cgroup *root_cgrp = kf_root->kn->priv;  in cgroup_root_from_kf()
1309 	struct cgroup *cgrp = &root->cgrp;  in cgroup_destroy_root()
1353 static struct cgroup *
1356 	struct cgroup *res = NULL;  in current_cgns_cgroup_from_root()
1372 			struct cgroup *c = link->cgrp;  in current_cgns_cgroup_from_root()
1387 static struct cgroup *cset_cgroup_from_root(struct css_set *cset,  in cset_cgroup_from_root()
1390 	struct cgroup *res = NULL;  in cset_cgroup_from_root()
1403 			struct cgroup *c = link->cgrp;  in cset_cgroup_from_root()
1420 struct cgroup *task_cgroup_from_root(struct task_struct *task,  in task_cgroup_from_root()
1458 static char *cgroup_file_name(struct cgroup *cgrp, const struct cftype *cft,  in cgroup_file_name()
1555 	struct cgroup *cgrp;  in cgroup_kn_unlock()
1585 struct cgroup *cgroup_kn_lock_live(struct kernfs_node *kn, bool drain_offline)  in cgroup_kn_lock_live()
1587 	struct cgroup *cgrp;  in cgroup_kn_lock_live()
1616 static void cgroup_rm_file(struct cgroup *cgrp, const struct cftype *cft)  in cgroup_rm_file()
1642 	struct cgroup *cgrp = css->cgroup;  in css_clear_dir()
1671 	struct cgroup *cgrp = css->cgroup;  in css_populate_dir()
1711 	struct cgroup *dcgrp = &dst_root->cgrp;  in rebind_subsystems()
1734 		struct cgroup *scgrp = &src_root->cgrp;  in rebind_subsystems()
1749 		css->cgroup = dcgrp;  in rebind_subsystems()
1785 	struct cgroup *ns_cgroup;  in cgroup_show_path()
1883 static void init_cgroup_housekeeping(struct cgroup *cgrp)  in init_cgroup_housekeeping()
1893 	cgrp->self.cgroup = cgrp;  in init_cgroup_housekeeping()
1911 	struct cgroup *cgrp = &root->cgrp;  in init_cgroup_root()
1930 	struct cgroup *root_cgrp = &root->cgrp;  in cgroup_setup_root()
2043 		struct cgroup *cgrp;  in cgroup_do_get_tree()
2216 int cgroup_path_ns_locked(struct cgroup *cgrp, char *buf, size_t buflen,  in cgroup_path_ns_locked()
2219 	struct cgroup *root = cset_cgroup_from_root(ns->root_cset, cgrp->root);  in cgroup_path_ns_locked()
2224 int cgroup_path_ns(struct cgroup *cgrp, char *buf, size_t buflen,  in cgroup_path_ns()
2257 	struct cgroup *cgrp;  in task_cgroup_path()
2497 int cgroup_migrate_vet_dst(struct cgroup *dst_cgrp)  in cgroup_migrate_vet_dst()
2572 			    struct cgroup *dst_cgrp,  in cgroup_migrate_add_src()
2575 	struct cgroup *src_cgrp;  in cgroup_migrate_add_src()
2717 int cgroup_attach_task(struct cgroup *dst_cgrp, struct task_struct *leader,  in cgroup_attach_task()
2848 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_controllers_show()
2857 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_subtree_control_show()
2872 static int cgroup_update_dfl_csses(struct cgroup *cgrp)  in cgroup_update_dfl_csses()
2876 	struct cgroup *dsct;  in cgroup_update_dfl_csses()
2924 void cgroup_lock_and_drain_offline(struct cgroup *cgrp)  in cgroup_lock_and_drain_offline()
2927 	struct cgroup *dsct;  in cgroup_lock_and_drain_offline()
2965 static void cgroup_save_control(struct cgroup *cgrp)  in cgroup_save_control()
2967 	struct cgroup *dsct;  in cgroup_save_control()
2985 static void cgroup_propagate_control(struct cgroup *cgrp)  in cgroup_propagate_control()
2987 	struct cgroup *dsct;  in cgroup_propagate_control()
3006 static void cgroup_restore_control(struct cgroup *cgrp)  in cgroup_restore_control()
3008 	struct cgroup *dsct;  in cgroup_restore_control()
3021 	struct cgroup *cgrp = css->cgroup;  in css_visible()
3043 static int cgroup_apply_control_enable(struct cgroup *cgrp)  in cgroup_apply_control_enable()
3045 	struct cgroup *dsct;  in cgroup_apply_control_enable()
3089 static void cgroup_apply_control_disable(struct cgroup *cgrp)  in cgroup_apply_control_disable()
3091 	struct cgroup *dsct;  in cgroup_apply_control_disable()
3134 static int cgroup_apply_control(struct cgroup *cgrp)  in cgroup_apply_control()
3163 static void cgroup_finalize_control(struct cgroup *cgrp, int ret)  in cgroup_finalize_control()
3173 static int cgroup_vet_subtree_control_enable(struct cgroup *cgrp, u16 enable)  in cgroup_vet_subtree_control_enable()
3219 	struct cgroup *cgrp, *child;  in cgroup_subtree_control_write()
3318 static int cgroup_enable_threaded(struct cgroup *cgrp)  in cgroup_enable_threaded()
3320 	struct cgroup *parent = cgroup_parent(cgrp);  in cgroup_enable_threaded()
3321 	struct cgroup *dom_cgrp = parent->dom_cgrp;  in cgroup_enable_threaded()
3322 	struct cgroup *dsct;  in cgroup_enable_threaded()
3367 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_type_show()
3384 	struct cgroup *cgrp;  in cgroup_type_write()
3405 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_max_descendants_show()
3419 	struct cgroup *cgrp;  in cgroup_max_descendants_write()
3448 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_max_depth_show()
3462 	struct cgroup *cgrp;  in cgroup_max_depth_write()
3491 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_events_show()
3501 	struct cgroup *cgroup = seq_css(seq)->cgroup;  in cgroup_stat_show()  local
3504 		   cgroup->nr_descendants);  in cgroup_stat_show()
3506 		   cgroup->nr_dying_descendants);  in cgroup_stat_show()
3512 						 struct cgroup *cgrp, int ssid)  in cgroup_extra_stat_show()
3532 	struct cgroup __maybe_unused *cgrp = seq_css(seq)->cgroup;  in cpu_stat_show()
3545 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_io_pressure_show()
3552 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_memory_pressure_show()
3559 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_cpu_pressure_show()
3569 	struct cgroup *cgrp;  in cgroup_pressure_write()
3626 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_freeze_show()
3636 	struct cgroup *cgrp;  in cgroup_freeze_write()
3679 	struct cgroup *cgrp = of->kn->parent->priv;  in cgroup_file_write()
3812 static int cgroup_add_file(struct cgroup_subsys_state *css, struct cgroup *cgrp,  in cgroup_add_file()
3861 			      struct cgroup *cgrp, struct cftype cfts[],  in cgroup_addrm_files()
3901 	struct cgroup *root = &ss->root->cgrp;  in cgroup_apply_cftypes()
3909 		struct cgroup *cgrp = css->cgroup;  in cgroup_apply_cftypes()
4528 		it->cset_pos = &css->cgroup->e_csets[css->ss->id];  in css_task_iter_start()
4530 		it->cset_pos = &css->cgroup->cset_links;  in css_task_iter_start()
4617 	struct cgroup *cgrp = seq_css(s)->cgroup;  in __cgroup_procs_start()
4644 	struct cgroup *cgrp = seq_css(s)->cgroup;  in cgroup_procs_start()
4665 static int cgroup_may_write(const struct cgroup *cgrp, struct super_block *sb)  in cgroup_may_write()
4681 static int cgroup_procs_write_permission(struct cgroup *src_cgrp,  in cgroup_procs_write_permission()
4682 					 struct cgroup *dst_cgrp,  in cgroup_procs_write_permission()
4686 	struct cgroup *com_cgrp = src_cgrp;  in cgroup_procs_write_permission()
4712 static int cgroup_attach_permissions(struct cgroup *src_cgrp,  in cgroup_attach_permissions()
4713 				     struct cgroup *dst_cgrp,  in cgroup_attach_permissions()
4735 	struct cgroup *src_cgrp, *dst_cgrp;  in cgroup_procs_write()
4777 	struct cgroup *src_cgrp, *dst_cgrp;  in cgroup_threads_write()
4825 		.file_offset = offsetof(struct cgroup, procs_file),
4854 		.file_offset = offsetof(struct cgroup, events_file),
4934 	struct cgroup *cgrp = css->cgroup;  in css_free_rwork_fn()
4984 	struct cgroup *cgrp = css->cgroup;  in css_release_work_fn()
5002 		struct cgroup *tcgrp;  in css_release_work_fn()
5044 			      struct cgroup_subsys *ss, struct cgroup *cgrp)  in init_and_link_css()
5051 	css->cgroup = cgrp;  in init_and_link_css()
5083 		rcu_assign_pointer(css->cgroup->subsys[ss->id], css);  in online_css()
5106 	RCU_INIT_POINTER(css->cgroup->subsys[ss->id], NULL);  in offline_css()
5108 	wake_up_all(&css->cgroup->offline_waitq);  in offline_css()
5120 static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,  in css_create()
5123 	struct cgroup *parent = cgroup_parent(cgrp);  in css_create()
5180 static struct cgroup *cgroup_create(struct cgroup *parent, const char *name,  in cgroup_create()
5184 	struct cgroup *cgrp, *tcgrp;  in cgroup_create()
5299 static bool cgroup_check_hierarchy_limits(struct cgroup *parent)  in cgroup_check_hierarchy_limits()
5301 	struct cgroup *cgroup;  in cgroup_check_hierarchy_limits()  local
5307 	for (cgroup = parent; cgroup; cgroup = cgroup_parent(cgroup)) {  in cgroup_check_hierarchy_limits()
5308 		if (cgroup->nr_descendants >= cgroup->max_descendants)  in cgroup_check_hierarchy_limits()
5311 		if (level > cgroup->max_depth)  in cgroup_check_hierarchy_limits()
5324 	struct cgroup *parent, *cgrp;  in cgroup_mkdir()
5480 static int cgroup_destroy_locked(struct cgroup *cgrp)  in cgroup_destroy_locked()
5483 	struct cgroup *tcgrp, *parent = cgroup_parent(cgrp);  in cgroup_destroy_locked()
5554 	struct cgroup *cgrp;  in cgroup_rmdir()
5830 		struct cgroup *cgrp;  in proc_cgroup_show()
5899 static struct cgroup *cgroup_get_from_file(struct file *f)  in cgroup_get_from_file()
5902 	struct cgroup *cgrp;  in cgroup_get_from_file()
5908 	cgrp = css->cgroup;  in cgroup_get_from_file()
5937 	struct cgroup *dst_cgrp = NULL;  in cgroup_css_set_fork()
5957 	f = fget_raw(kargs->cgroup);  in cgroup_css_set_fork()
6027 		struct cgroup *cgrp = kargs->cgrp;  in cgroup_css_set_put_fork()
6278 	struct cgroup *cgrp;  in css_tryget_online_from_dir()
6326 struct cgroup *cgroup_get_from_path(const char *path)  in cgroup_get_from_path()
6329 	struct cgroup *cgrp;  in cgroup_get_from_path()
6360 struct cgroup *cgroup_get_from_fd(int fd)  in cgroup_get_from_fd()
6362 	struct cgroup *cgrp;  in cgroup_get_from_fd()
6487 	struct cgroup *cgrp = sock_cgroup_ptr(skcd);  in cgroup_sk_free()
6498 int cgroup_bpf_attach(struct cgroup *cgrp,  in cgroup_bpf_attach()
6512 int cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog,  in cgroup_bpf_detach()
6523 int cgroup_bpf_query(struct cgroup *cgrp, const union bpf_attr *attr,  in cgroup_bpf_query()