238 static int cgroup_apply_control(struct cgroup *cgrp);
239 static void cgroup_finalize_control(struct cgroup *cgrp, int ret);
242 static int cgroup_destroy_locked(struct cgroup *cgrp);
243 static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,
248 			      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;			\
820 static void cgroup_update_populated(struct cgroup *cgrp, bool populated)  in cgroup_update_populated()
822 	struct cgroup *child = NULL;  in cgroup_update_populated()
1004 			     struct cgroup *new_cgrp,  in compare_css_sets()
1007 	struct cgroup *new_dfl_cgrp;  in compare_css_sets()
1038 		struct cgroup *cgrp1, *cgrp2;  in compare_css_sets()
1082 					struct cgroup *cgrp,  in find_existing_css_set()
1168 			 struct cgroup *cgrp)  in link_css_set()
1201 				    struct cgroup *cgrp)  in find_css_set()
1254 		struct cgroup *c = link->cgrp;  in find_css_set()
1273 			      &css->cgroup->e_csets[ssid]);  in find_css_set()
1306 	struct cgroup *root_cgrp = kernfs_root_to_node(kf_root)->priv;  in cgroup_root_from_kf()
1353 	struct cgroup *cgrp = &root->cgrp;  in cgroup_destroy_root()
1398 static inline struct cgroup *__cset_cgroup_from_root(struct css_set *cset,  in __cset_cgroup_from_root()
1401 	struct cgroup *res_cgroup = NULL;  in __cset_cgroup_from_root()
1412 			struct cgroup *c = link->cgrp;  in __cset_cgroup_from_root()
1429 static struct cgroup *
1432 	struct cgroup *res = NULL;  in current_cgns_cgroup_from_root()
1458 static struct cgroup *current_cgns_cgroup_dfl(void)  in current_cgns_cgroup_dfl()
1467 static struct cgroup *cset_cgroup_from_root(struct css_set *cset,  in cset_cgroup_from_root()
1480 struct cgroup *task_cgroup_from_root(struct task_struct *task,  in task_cgroup_from_root()
1518 static char *cgroup_file_name(struct cgroup *cgrp, const struct cftype *cft,  in cgroup_file_name()
1615 	struct cgroup *cgrp;  in cgroup_kn_unlock()
1645 struct cgroup *cgroup_kn_lock_live(struct kernfs_node *kn, bool drain_offline)  in cgroup_kn_lock_live()
1647 	struct cgroup *cgrp;  in cgroup_kn_lock_live()
1676 static void cgroup_rm_file(struct cgroup *cgrp, const struct cftype *cft)  in cgroup_rm_file()
1702 	struct cgroup *cgrp = css->cgroup;  in css_clear_dir()
1735 	struct cgroup *cgrp = css->cgroup;  in css_populate_dir()
1783 	struct cgroup *dcgrp = &dst_root->cgrp;  in rebind_subsystems()
1814 		struct cgroup *scgrp = &cgrp_dfl_root.cgrp;  in rebind_subsystems()
1827 		struct cgroup *scgrp = &src_root->cgrp;  in rebind_subsystems()
1844 		css->cgroup = dcgrp;  in rebind_subsystems()
1887 	struct cgroup *ns_cgroup;  in cgroup_show_path()
1995 static void init_cgroup_housekeeping(struct cgroup *cgrp)  in init_cgroup_housekeeping()
2005 	cgrp->self.cgroup = cgrp;  in init_cgroup_housekeeping()
2023 	struct cgroup *cgrp = &root->cgrp;  in init_cgroup_root()
2043 	struct cgroup *root_cgrp = &root->cgrp;  in cgroup_setup_root()
2162 		struct cgroup *cgrp;  in cgroup_do_get_tree()
2340 int cgroup_path_ns_locked(struct cgroup *cgrp, char *buf, size_t buflen,  in cgroup_path_ns_locked()
2343 	struct cgroup *root = cset_cgroup_from_root(ns->root_cset, cgrp->root);  in cgroup_path_ns_locked()
2348 int cgroup_path_ns(struct cgroup *cgrp, char *buf, size_t buflen,  in cgroup_path_ns()
2381 	struct cgroup *cgrp;  in task_cgroup_path()
2662 int cgroup_migrate_vet_dst(struct cgroup *dst_cgrp)  in cgroup_migrate_vet_dst()
2739 			    struct cgroup *dst_cgrp,  in cgroup_migrate_add_src()
2742 	struct cgroup *src_cgrp;  in cgroup_migrate_add_src()
2884 int cgroup_attach_task(struct cgroup *dst_cgrp, struct task_struct *leader,  in cgroup_attach_task()
3007 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_controllers_show()
3016 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_subtree_control_show()
3031 static int cgroup_update_dfl_csses(struct cgroup *cgrp)  in cgroup_update_dfl_csses()
3035 	struct cgroup *dsct;  in cgroup_update_dfl_csses()
3101 void cgroup_lock_and_drain_offline(struct cgroup *cgrp)  in cgroup_lock_and_drain_offline()
3104 	struct cgroup *dsct;  in cgroup_lock_and_drain_offline()
3142 static void cgroup_save_control(struct cgroup *cgrp)  in cgroup_save_control()
3144 	struct cgroup *dsct;  in cgroup_save_control()
3162 static void cgroup_propagate_control(struct cgroup *cgrp)  in cgroup_propagate_control()
3164 	struct cgroup *dsct;  in cgroup_propagate_control()
3183 static void cgroup_restore_control(struct cgroup *cgrp)  in cgroup_restore_control()
3185 	struct cgroup *dsct;  in cgroup_restore_control()
3198 	struct cgroup *cgrp = css->cgroup;  in css_visible()
3220 static int cgroup_apply_control_enable(struct cgroup *cgrp)  in cgroup_apply_control_enable()
3222 	struct cgroup *dsct;  in cgroup_apply_control_enable()
3266 static void cgroup_apply_control_disable(struct cgroup *cgrp)  in cgroup_apply_control_disable()
3268 	struct cgroup *dsct;  in cgroup_apply_control_disable()
3311 static int cgroup_apply_control(struct cgroup *cgrp)  in cgroup_apply_control()
3336 static void cgroup_finalize_control(struct cgroup *cgrp, int ret)  in cgroup_finalize_control()
3346 static int cgroup_vet_subtree_control_enable(struct cgroup *cgrp, u16 enable)  in cgroup_vet_subtree_control_enable()
3392 	struct cgroup *cgrp, *child;  in cgroup_subtree_control_write()
3491 static int cgroup_enable_threaded(struct cgroup *cgrp)  in cgroup_enable_threaded()
3493 	struct cgroup *parent = cgroup_parent(cgrp);  in cgroup_enable_threaded()
3494 	struct cgroup *dom_cgrp = parent->dom_cgrp;  in cgroup_enable_threaded()
3495 	struct cgroup *dsct;  in cgroup_enable_threaded()
3540 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_type_show()
3557 	struct cgroup *cgrp;  in cgroup_type_write()
3578 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_max_descendants_show()
3592 	struct cgroup *cgrp;  in cgroup_max_descendants_write()
3621 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_max_depth_show()
3635 	struct cgroup *cgrp;  in cgroup_max_depth_write()
3664 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_events_show()
3674 	struct cgroup *cgroup = seq_css(seq)->cgroup;  in cgroup_stat_show()  local
3677 		   cgroup->nr_descendants);  in cgroup_stat_show()
3679 		   cgroup->nr_dying_descendants);  in cgroup_stat_show()
3685 						 struct cgroup *cgrp, int ssid)  in cgroup_extra_stat_show()
3705 	struct cgroup __maybe_unused *cgrp = seq_css(seq)->cgroup;  in cpu_stat_show()
3718 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_io_pressure_show()
3725 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_memory_pressure_show()
3732 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_cpu_pressure_show()
3743 	struct cgroup *cgrp;  in pressure_write()
3796 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_irq_pressure_show()
3812 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_pressure_show()
3826 	struct cgroup *cgrp;  in cgroup_pressure_write()
3891 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_freeze_show()
3901 	struct cgroup *cgrp;  in cgroup_freeze_write()
3923 static void __cgroup_kill(struct cgroup *cgrp)  in __cgroup_kill()
3953 static void cgroup_kill(struct cgroup *cgrp)  in cgroup_kill()
3956 	struct cgroup *dsct;  in cgroup_kill()
3969 	struct cgroup *cgrp;  in cgroup_kill_write()
4037 	struct cgroup *cgrp = of->kn->parent->priv;  in cgroup_file_write()
4170 static int cgroup_add_file(struct cgroup_subsys_state *css, struct cgroup *cgrp,  in cgroup_add_file()
4219 			      struct cgroup *cgrp, struct cftype cfts[],  in cgroup_addrm_files()
4259 	struct cgroup *root = &ss->root->cgrp;  in cgroup_apply_cftypes()
4267 		struct cgroup *cgrp = css->cgroup;  in cgroup_apply_cftypes()
4919 		it->cset_pos = &css->cgroup->e_csets[css->ss->id];  in css_task_iter_start()
4921 		it->cset_pos = &css->cgroup->cset_links;  in css_task_iter_start()
5008 	struct cgroup *cgrp = seq_css(s)->cgroup;  in __cgroup_procs_start()
5032 	struct cgroup *cgrp = seq_css(s)->cgroup;  in cgroup_procs_start()
5053 static int cgroup_may_write(const struct cgroup *cgrp, struct super_block *sb)  in cgroup_may_write()
5069 static int cgroup_procs_write_permission(struct cgroup *src_cgrp,  in cgroup_procs_write_permission()
5070 					 struct cgroup *dst_cgrp,  in cgroup_procs_write_permission()
5074 	struct cgroup *com_cgrp = src_cgrp;  in cgroup_procs_write_permission()
5100 static int cgroup_attach_permissions(struct cgroup *src_cgrp,  in cgroup_attach_permissions()
5101 				     struct cgroup *dst_cgrp,  in cgroup_attach_permissions()
5125 	struct cgroup *src_cgrp, *dst_cgrp;  in __cgroup_procs_write()
5196 		.file_offset = offsetof(struct cgroup, procs_file),
5225 		.file_offset = offsetof(struct cgroup, events_file),
5264 		.file_offset = offsetof(struct cgroup, psi_files[PSI_IO]),
5272 		.file_offset = offsetof(struct cgroup, psi_files[PSI_MEM]),
5280 		.file_offset = offsetof(struct cgroup, psi_files[PSI_CPU]),
5289 		.file_offset = offsetof(struct cgroup, psi_files[PSI_IRQ]),
5332 	struct cgroup *cgrp = css->cgroup;  in css_free_rwork_fn()
5381 	struct cgroup *cgrp = css->cgroup;  in css_release_work_fn()
5399 		struct cgroup *tcgrp;  in css_release_work_fn()
5440 			      struct cgroup_subsys *ss, struct cgroup *cgrp)  in init_and_link_css()
5447 	css->cgroup = cgrp;  in init_and_link_css()
5479 		rcu_assign_pointer(css->cgroup->subsys[ss->id], css);  in online_css()
5502 	RCU_INIT_POINTER(css->cgroup->subsys[ss->id], NULL);  in offline_css()
5504 	wake_up_all(&css->cgroup->offline_waitq);  in offline_css()
5516 static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,  in css_create()
5519 	struct cgroup *parent = cgroup_parent(cgrp);  in css_create()
5567 static struct cgroup *cgroup_create(struct cgroup *parent, const char *name,  in cgroup_create()
5571 	struct cgroup *cgrp, *tcgrp;  in cgroup_create()
5682 static bool cgroup_check_hierarchy_limits(struct cgroup *parent)  in cgroup_check_hierarchy_limits()
5684 	struct cgroup *cgroup;  in cgroup_check_hierarchy_limits()  local
5690 	for (cgroup = parent; cgroup; cgroup = cgroup_parent(cgroup)) {  in cgroup_check_hierarchy_limits()
5691 		if (cgroup->nr_descendants >= cgroup->max_descendants)  in cgroup_check_hierarchy_limits()
5694 		if (level > cgroup->max_depth)  in cgroup_check_hierarchy_limits()
5707 	struct cgroup *parent, *cgrp;  in cgroup_mkdir()
5863 static int cgroup_destroy_locked(struct cgroup *cgrp)  in cgroup_destroy_locked()
5866 	struct cgroup *tcgrp, *parent = cgroup_parent(cgrp);  in cgroup_destroy_locked()
5937 	struct cgroup *cgrp;  in cgroup_rmdir()
6186 struct cgroup *cgroup_get_from_id(u64 id)  in cgroup_get_from_id()
6189 	struct cgroup *cgrp, *root_cgrp;  in cgroup_get_from_id()
6244 		struct cgroup *cgrp;  in proc_cgroup_show()
6321 static struct cgroup *cgroup_v1v2_get_from_file(struct file *f)  in cgroup_v1v2_get_from_file()
6329 	return css->cgroup;  in cgroup_v1v2_get_from_file()
6337 static struct cgroup *cgroup_get_from_file(struct file *f)  in cgroup_get_from_file()
6339 	struct cgroup *cgrp = cgroup_v1v2_get_from_file(f);  in cgroup_get_from_file()
6372 	struct cgroup *dst_cgrp = NULL;  in cgroup_css_set_fork()
6392 	f = fget_raw(kargs->cgroup);  in cgroup_css_set_fork()
6477 		struct cgroup *cgrp = kargs->cgrp;  in cgroup_css_set_put_fork()
6763 	struct cgroup *cgrp;  in css_tryget_online_from_dir()
6811 struct cgroup *cgroup_get_from_path(const char *path)  in cgroup_get_from_path()
6814 	struct cgroup *cgrp = ERR_PTR(-ENOENT);  in cgroup_get_from_path()
6815 	struct cgroup *root_cgrp;  in cgroup_get_from_path()
6851 struct cgroup *cgroup_v1v2_get_from_fd(int fd)  in cgroup_v1v2_get_from_fd()
6853 	struct cgroup *cgrp;  in cgroup_v1v2_get_from_fd()
6870 struct cgroup *cgroup_get_from_fd(int fd)  in cgroup_get_from_fd()
6872 	struct cgroup *cgrp = cgroup_v1v2_get_from_fd(fd);  in cgroup_get_from_fd()
6935 	struct cgroup *cgroup;  in cgroup_sk_alloc()  local
6940 		cgroup = &cgrp_dfl_root.cgrp;  in cgroup_sk_alloc()
6941 		cgroup_get(cgroup);  in cgroup_sk_alloc()
6950 			cgroup = cset->dfl_cgrp;  in cgroup_sk_alloc()
6956 	skcd->cgroup = cgroup;  in cgroup_sk_alloc()
6957 	cgroup_bpf_get(cgroup);  in cgroup_sk_alloc()
6963 	struct cgroup *cgrp = sock_cgroup_ptr(skcd);  in cgroup_sk_clone()
6976 	struct cgroup *cgrp = sock_cgroup_ptr(skcd);  in cgroup_sk_free()