236 static int cgroup_apply_control(struct cgroup *cgrp);
237 static void cgroup_finalize_control(struct cgroup *cgrp, int ret);
240 static int cgroup_destroy_locked(struct cgroup *cgrp);
241 static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,
246 			      struct cgroup *cgrp, struct cftype cfts[],
312 bool cgroup_on_dfl(const struct cgroup *cgrp)  in cgroup_on_dfl()
348 static bool cgroup_has_tasks(struct cgroup *cgrp)  in cgroup_has_tasks()
353 bool cgroup_is_threaded(struct cgroup *cgrp)  in cgroup_is_threaded()
359 static bool cgroup_is_mixable(struct cgroup *cgrp)  in cgroup_is_mixable()
370 static bool cgroup_can_be_thread_root(struct cgroup *cgrp)  in cgroup_can_be_thread_root()
392 bool cgroup_is_thread_root(struct cgroup *cgrp)  in cgroup_is_thread_root()
414 static bool cgroup_is_valid_domain(struct cgroup *cgrp)  in cgroup_is_valid_domain()
432 static u16 cgroup_control(struct cgroup *cgrp)  in cgroup_control()
434 	struct cgroup *parent = cgroup_parent(cgrp);  in cgroup_control()
453 static u16 cgroup_ss_mask(struct cgroup *cgrp)  in cgroup_ss_mask()
455 	struct cgroup *parent = cgroup_parent(cgrp);  in cgroup_ss_mask()
480 static struct cgroup_subsys_state *cgroup_css(struct cgroup *cgrp,  in cgroup_css()
498 static struct cgroup_subsys_state *cgroup_tryget_css(struct cgroup *cgrp,  in cgroup_tryget_css()
522 static struct cgroup_subsys_state *cgroup_e_css_by_mask(struct cgroup *cgrp,  in cgroup_e_css_by_mask()
556 struct cgroup_subsys_state *cgroup_e_css(struct cgroup *cgrp,  in cgroup_e_css()
586 struct cgroup_subsys_state *cgroup_get_e_css(struct cgroup *cgrp,  in cgroup_get_e_css()
612 static void cgroup_get_live(struct cgroup *cgrp)  in cgroup_get_live()
623 int __cgroup_task_count(const struct cgroup *cgrp)  in __cgroup_task_count()
640 int cgroup_task_count(const struct cgroup *cgrp)  in cgroup_task_count()
653 	struct cgroup *cgrp = of->kn->parent->priv;  in of_css()
737 		       (dsct) = (d_css)->cgroup;			\
746 		       (dsct) = (d_css)->cgroup;			\
819 static void cgroup_update_populated(struct cgroup *cgrp, bool populated)  in cgroup_update_populated()
821 	struct cgroup *child = NULL;  in cgroup_update_populated()
1003 			     struct cgroup *new_cgrp,  in compare_css_sets()
1006 	struct cgroup *new_dfl_cgrp;  in compare_css_sets()
1037 		struct cgroup *cgrp1, *cgrp2;  in compare_css_sets()
1081 					struct cgroup *cgrp,  in find_existing_css_set()
1167 			 struct cgroup *cgrp)  in link_css_set()
1200 				    struct cgroup *cgrp)  in find_css_set()
1252 		struct cgroup *c = link->cgrp;  in find_css_set()
1271 			      &css->cgroup->e_csets[ssid]);  in find_css_set()
1304 	struct cgroup *root_cgrp = kf_root->kn->priv;  in cgroup_root_from_kf()
1337 	struct cgroup *cgrp = &root->cgrp;  in cgroup_destroy_root()
1382 static struct cgroup *
1385 	struct cgroup *res = NULL;  in current_cgns_cgroup_from_root()
1401 			struct cgroup *c = link->cgrp;  in current_cgns_cgroup_from_root()
1416 static struct cgroup *cset_cgroup_from_root(struct css_set *cset,  in cset_cgroup_from_root()
1419 	struct cgroup *res = NULL;  in cset_cgroup_from_root()
1432 			struct cgroup *c = link->cgrp;  in cset_cgroup_from_root()
1449 struct cgroup *task_cgroup_from_root(struct task_struct *task,  in task_cgroup_from_root()
1487 static char *cgroup_file_name(struct cgroup *cgrp, const struct cftype *cft,  in cgroup_file_name()
1584 	struct cgroup *cgrp;  in cgroup_kn_unlock()
1614 struct cgroup *cgroup_kn_lock_live(struct kernfs_node *kn, bool drain_offline)  in cgroup_kn_lock_live()
1616 	struct cgroup *cgrp;  in cgroup_kn_lock_live()
1645 static void cgroup_rm_file(struct cgroup *cgrp, const struct cftype *cft)  in cgroup_rm_file()
1671 	struct cgroup *cgrp = css->cgroup;  in css_clear_dir()
1700 	struct cgroup *cgrp = css->cgroup;  in css_populate_dir()
1740 	struct cgroup *dcgrp = &dst_root->cgrp;  in rebind_subsystems()
1763 		struct cgroup *scgrp = &src_root->cgrp;  in rebind_subsystems()
1778 		css->cgroup = dcgrp;  in rebind_subsystems()
1820 	struct cgroup *ns_cgroup;  in cgroup_show_path()
1918 static void init_cgroup_housekeeping(struct cgroup *cgrp)  in init_cgroup_housekeeping()
1928 	cgrp->self.cgroup = cgrp;  in init_cgroup_housekeeping()
1946 	struct cgroup *cgrp = &root->cgrp;  in init_cgroup_root()
1965 	struct cgroup *root_cgrp = &root->cgrp;  in cgroup_setup_root()
2084 		struct cgroup *cgrp;  in cgroup_do_get_tree()
2258 int cgroup_path_ns_locked(struct cgroup *cgrp, char *buf, size_t buflen,  in cgroup_path_ns_locked()
2261 	struct cgroup *root = cset_cgroup_from_root(ns->root_cset, cgrp->root);  in cgroup_path_ns_locked()
2266 int cgroup_path_ns(struct cgroup *cgrp, char *buf, size_t buflen,  in cgroup_path_ns()
2299 	struct cgroup *cgrp;  in task_cgroup_path()
2539 int cgroup_migrate_vet_dst(struct cgroup *dst_cgrp)  in cgroup_migrate_vet_dst()
2614 			    struct cgroup *dst_cgrp,  in cgroup_migrate_add_src()
2617 	struct cgroup *src_cgrp;  in cgroup_migrate_add_src()
2759 int cgroup_attach_task(struct cgroup *dst_cgrp, struct task_struct *leader,  in cgroup_attach_task()
2890 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_controllers_show()
2899 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_subtree_control_show()
2914 static int cgroup_update_dfl_csses(struct cgroup *cgrp)  in cgroup_update_dfl_csses()
2918 	struct cgroup *dsct;  in cgroup_update_dfl_csses()
2966 void cgroup_lock_and_drain_offline(struct cgroup *cgrp)  in cgroup_lock_and_drain_offline()
2969 	struct cgroup *dsct;  in cgroup_lock_and_drain_offline()
3007 static void cgroup_save_control(struct cgroup *cgrp)  in cgroup_save_control()
3009 	struct cgroup *dsct;  in cgroup_save_control()
3027 static void cgroup_propagate_control(struct cgroup *cgrp)  in cgroup_propagate_control()
3029 	struct cgroup *dsct;  in cgroup_propagate_control()
3048 static void cgroup_restore_control(struct cgroup *cgrp)  in cgroup_restore_control()
3050 	struct cgroup *dsct;  in cgroup_restore_control()
3063 	struct cgroup *cgrp = css->cgroup;  in css_visible()
3085 static int cgroup_apply_control_enable(struct cgroup *cgrp)  in cgroup_apply_control_enable()
3087 	struct cgroup *dsct;  in cgroup_apply_control_enable()
3131 static void cgroup_apply_control_disable(struct cgroup *cgrp)  in cgroup_apply_control_disable()
3133 	struct cgroup *dsct;  in cgroup_apply_control_disable()
3176 static int cgroup_apply_control(struct cgroup *cgrp)  in cgroup_apply_control()
3205 static void cgroup_finalize_control(struct cgroup *cgrp, int ret)  in cgroup_finalize_control()
3215 static int cgroup_vet_subtree_control_enable(struct cgroup *cgrp, u16 enable)  in cgroup_vet_subtree_control_enable()
3261 	struct cgroup *cgrp, *child;  in cgroup_subtree_control_write()
3360 static int cgroup_enable_threaded(struct cgroup *cgrp)  in cgroup_enable_threaded()
3362 	struct cgroup *parent = cgroup_parent(cgrp);  in cgroup_enable_threaded()
3363 	struct cgroup *dom_cgrp = parent->dom_cgrp;  in cgroup_enable_threaded()
3364 	struct cgroup *dsct;  in cgroup_enable_threaded()
3409 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_type_show()
3426 	struct cgroup *cgrp;  in cgroup_type_write()
3447 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_max_descendants_show()
3461 	struct cgroup *cgrp;  in cgroup_max_descendants_write()
3490 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_max_depth_show()
3504 	struct cgroup *cgrp;  in cgroup_max_depth_write()
3533 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_events_show()
3543 	struct cgroup *cgroup = seq_css(seq)->cgroup;  in cgroup_stat_show()  local
3546 		   cgroup->nr_descendants);  in cgroup_stat_show()
3548 		   cgroup->nr_dying_descendants);  in cgroup_stat_show()
3554 						 struct cgroup *cgrp, int ssid)  in cgroup_extra_stat_show()
3574 	struct cgroup __maybe_unused *cgrp = seq_css(seq)->cgroup;  in cpu_stat_show()
3587 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_io_pressure_show()
3594 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_memory_pressure_show()
3601 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_cpu_pressure_show()
3611 	struct cgroup *cgrp;  in cgroup_pressure_write()
3682 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_freeze_show()
3692 	struct cgroup *cgrp;  in cgroup_freeze_write()
3714 static void __cgroup_kill(struct cgroup *cgrp)  in __cgroup_kill()
3744 static void cgroup_kill(struct cgroup *cgrp)  in cgroup_kill()
3747 	struct cgroup *dsct;  in cgroup_kill()
3760 	struct cgroup *cgrp;  in cgroup_kill_write()
3809 	struct cgroup *cgrp = of->kn->parent->priv;  in cgroup_file_write()
3942 static int cgroup_add_file(struct cgroup_subsys_state *css, struct cgroup *cgrp,  in cgroup_add_file()
3991 			      struct cgroup *cgrp, struct cftype cfts[],  in cgroup_addrm_files()
4033 	struct cgroup *root = &ss->root->cgrp;  in cgroup_apply_cftypes()
4041 		struct cgroup *cgrp = css->cgroup;  in cgroup_apply_cftypes()
4663 		it->cset_pos = &css->cgroup->e_csets[css->ss->id];  in css_task_iter_start()
4665 		it->cset_pos = &css->cgroup->cset_links;  in css_task_iter_start()
4752 	struct cgroup *cgrp = seq_css(s)->cgroup;  in __cgroup_procs_start()
4779 	struct cgroup *cgrp = seq_css(s)->cgroup;  in cgroup_procs_start()
4800 static int cgroup_may_write(const struct cgroup *cgrp, struct super_block *sb)  in cgroup_may_write()
4816 static int cgroup_procs_write_permission(struct cgroup *src_cgrp,  in cgroup_procs_write_permission()
4817 					 struct cgroup *dst_cgrp,  in cgroup_procs_write_permission()
4821 	struct cgroup *com_cgrp = src_cgrp;  in cgroup_procs_write_permission()
4847 static int cgroup_attach_permissions(struct cgroup *src_cgrp,  in cgroup_attach_permissions()
4848 				     struct cgroup *dst_cgrp,  in cgroup_attach_permissions()
4870 	struct cgroup *src_cgrp, *dst_cgrp;  in __cgroup_procs_write()
4933 		.file_offset = offsetof(struct cgroup, procs_file),
4962 		.file_offset = offsetof(struct cgroup, events_file),
5050 	struct cgroup *cgrp = css->cgroup;  in css_free_rwork_fn()
5099 	struct cgroup *cgrp = css->cgroup;  in css_release_work_fn()
5117 		struct cgroup *tcgrp;  in css_release_work_fn()
5158 			      struct cgroup_subsys *ss, struct cgroup *cgrp)  in init_and_link_css()
5165 	css->cgroup = cgrp;  in init_and_link_css()
5197 		rcu_assign_pointer(css->cgroup->subsys[ss->id], css);  in online_css()
5220 	RCU_INIT_POINTER(css->cgroup->subsys[ss->id], NULL);  in offline_css()
5222 	wake_up_all(&css->cgroup->offline_waitq);  in offline_css()
5234 static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,  in css_create()
5237 	struct cgroup *parent = cgroup_parent(cgrp);  in css_create()
5285 static struct cgroup *cgroup_create(struct cgroup *parent, const char *name,  in cgroup_create()
5289 	struct cgroup *cgrp, *tcgrp;  in cgroup_create()
5401 static bool cgroup_check_hierarchy_limits(struct cgroup *parent)  in cgroup_check_hierarchy_limits()
5403 	struct cgroup *cgroup;  in cgroup_check_hierarchy_limits()  local
5409 	for (cgroup = parent; cgroup; cgroup = cgroup_parent(cgroup)) {  in cgroup_check_hierarchy_limits()
5410 		if (cgroup->nr_descendants >= cgroup->max_descendants)  in cgroup_check_hierarchy_limits()
5413 		if (level > cgroup->max_depth)  in cgroup_check_hierarchy_limits()
5426 	struct cgroup *parent, *cgrp;  in cgroup_mkdir()
5582 static int cgroup_destroy_locked(struct cgroup *cgrp)  in cgroup_destroy_locked()
5585 	struct cgroup *tcgrp, *parent = cgroup_parent(cgrp);  in cgroup_destroy_locked()
5656 	struct cgroup *cgrp;  in cgroup_rmdir()
5909 struct cgroup *cgroup_get_from_id(u64 id)  in cgroup_get_from_id()
5912 	struct cgroup *cgrp = NULL;  in cgroup_get_from_id()
5951 		struct cgroup *cgrp;  in proc_cgroup_show()
6020 static struct cgroup *cgroup_get_from_file(struct file *f)  in cgroup_get_from_file()
6023 	struct cgroup *cgrp;  in cgroup_get_from_file()
6029 	cgrp = css->cgroup;  in cgroup_get_from_file()
6058 	struct cgroup *dst_cgrp = NULL;  in cgroup_css_set_fork()
6078 	f = fget_raw(kargs->cgroup);  in cgroup_css_set_fork()
6148 		struct cgroup *cgrp = kargs->cgrp;  in cgroup_css_set_put_fork()
6432 	struct cgroup *cgrp;  in css_tryget_online_from_dir()
6480 struct cgroup *cgroup_get_from_path(const char *path)  in cgroup_get_from_path()
6483 	struct cgroup *cgrp;  in cgroup_get_from_path()
6514 struct cgroup *cgroup_get_from_fd(int fd)  in cgroup_get_from_fd()
6516 	struct cgroup *cgrp;  in cgroup_get_from_fd()
6579 	struct cgroup *cgroup;  in cgroup_sk_alloc()  local
6584 		cgroup = &cgrp_dfl_root.cgrp;  in cgroup_sk_alloc()
6585 		cgroup_get(cgroup);  in cgroup_sk_alloc()
6594 			cgroup = cset->dfl_cgrp;  in cgroup_sk_alloc()
6600 	skcd->cgroup = cgroup;  in cgroup_sk_alloc()
6601 	cgroup_bpf_get(cgroup);  in cgroup_sk_alloc()
6607 	struct cgroup *cgrp = sock_cgroup_ptr(skcd);  in cgroup_sk_clone()
6620 	struct cgroup *cgrp = sock_cgroup_ptr(skcd);  in cgroup_sk_free()
6629 int cgroup_bpf_attach(struct cgroup *cgrp,  in cgroup_bpf_attach()
6643 int cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog,  in cgroup_bpf_detach()
6654 int cgroup_bpf_query(struct cgroup *cgrp, const union bpf_attr *attr,  in cgroup_bpf_query()