241 static int cgroup_apply_control(struct cgroup *cgrp);
242 static void cgroup_finalize_control(struct cgroup *cgrp, int ret);
245 static int cgroup_destroy_locked(struct cgroup *cgrp);
246 static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,
251 			      struct cgroup *cgrp, struct cftype cfts[],
319 bool cgroup_on_dfl(const struct cgroup *cgrp)  in cgroup_on_dfl()
355 static bool cgroup_has_tasks(struct cgroup *cgrp)  in cgroup_has_tasks()
360 static bool cgroup_is_threaded(struct cgroup *cgrp)  in cgroup_is_threaded()
366 static bool cgroup_is_mixable(struct cgroup *cgrp)  in cgroup_is_mixable()
377 static bool cgroup_can_be_thread_root(struct cgroup *cgrp)  in cgroup_can_be_thread_root()
399 static bool cgroup_is_thread_root(struct cgroup *cgrp)  in cgroup_is_thread_root()
421 static bool cgroup_is_valid_domain(struct cgroup *cgrp)  in cgroup_is_valid_domain()
439 static u16 cgroup_control(struct cgroup *cgrp)  in cgroup_control()
441 	struct cgroup *parent = cgroup_parent(cgrp);  in cgroup_control()
460 static u16 cgroup_ss_mask(struct cgroup *cgrp)  in cgroup_ss_mask()
462 	struct cgroup *parent = cgroup_parent(cgrp);  in cgroup_ss_mask()
487 static struct cgroup_subsys_state *cgroup_css(struct cgroup *cgrp,  in cgroup_css()
507 static struct cgroup_subsys_state *cgroup_e_css_by_mask(struct cgroup *cgrp,  in cgroup_e_css_by_mask()
541 struct cgroup_subsys_state *cgroup_e_css(struct cgroup *cgrp,  in cgroup_e_css()
571 struct cgroup_subsys_state *cgroup_get_e_css(struct cgroup *cgrp,  in cgroup_get_e_css()
597 static void cgroup_get_live(struct cgroup *cgrp)  in cgroup_get_live()
608 int __cgroup_task_count(const struct cgroup *cgrp)  in __cgroup_task_count()
625 int cgroup_task_count(const struct cgroup *cgrp)  in cgroup_task_count()
638 	struct cgroup *cgrp = of->kn->parent->priv;  in of_css()
707 		       (dsct) = (d_css)->cgroup;			\
716 		       (dsct) = (d_css)->cgroup;			\
790 static void cgroup_update_populated(struct cgroup *cgrp, bool populated)  in cgroup_update_populated()
792 	struct cgroup *child = NULL;  in cgroup_update_populated()
974 			     struct cgroup *new_cgrp,  in compare_css_sets()
977 	struct cgroup *new_dfl_cgrp;  in compare_css_sets()
1008 		struct cgroup *cgrp1, *cgrp2;  in compare_css_sets()
1052 					struct cgroup *cgrp,  in find_existing_css_set()
1138 			 struct cgroup *cgrp)  in link_css_set()
1171 				    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 = kernfs_root_to_node(kf_root)->priv;  in cgroup_root_from_kf()
1323 	struct cgroup *cgrp = &root->cgrp;  in cgroup_destroy_root()
1369 static inline struct cgroup *__cset_cgroup_from_root(struct css_set *cset,  in __cset_cgroup_from_root()
1372 	struct cgroup *res_cgroup = NULL;  in __cset_cgroup_from_root()
1383 			struct cgroup *c = link->cgrp;  in __cset_cgroup_from_root()
1408 static struct cgroup *
1411 	struct cgroup *res = NULL;  in current_cgns_cgroup_from_root()
1442 static struct cgroup *current_cgns_cgroup_dfl(void)  in current_cgns_cgroup_dfl()
1461 static struct cgroup *cset_cgroup_from_root(struct css_set *cset,  in cset_cgroup_from_root()
1475 struct cgroup *task_cgroup_from_root(struct task_struct *task,  in task_cgroup_from_root()
1513 static char *cgroup_file_name(struct cgroup *cgrp, const struct cftype *cft,  in cgroup_file_name()
1610 	struct cgroup *cgrp;  in cgroup_kn_unlock()
1640 struct cgroup *cgroup_kn_lock_live(struct kernfs_node *kn, bool drain_offline)  in cgroup_kn_lock_live()
1642 	struct cgroup *cgrp;  in cgroup_kn_lock_live()
1671 static void cgroup_rm_file(struct cgroup *cgrp, const struct cftype *cft)  in cgroup_rm_file()
1697 	struct cgroup *cgrp = css->cgroup;  in css_clear_dir()
1730 	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()
1847 		css->cgroup = dcgrp;  in rebind_subsystems()
1901 	struct cgroup *ns_cgroup;  in cgroup_show_path()
2040 static void init_cgroup_housekeeping(struct cgroup *cgrp)  in init_cgroup_housekeeping()
2050 	cgrp->self.cgroup = cgrp;  in init_cgroup_housekeeping()
2068 	struct cgroup *cgrp = &root->cgrp;  in init_cgroup_root()
2088 	struct cgroup *root_cgrp = &root->cgrp;  in cgroup_setup_root()
2207 		struct cgroup *cgrp;  in cgroup_do_get_tree()
2385 int cgroup_path_ns_locked(struct cgroup *cgrp, char *buf, size_t buflen,  in cgroup_path_ns_locked()
2388 	struct cgroup *root = cset_cgroup_from_root(ns->root_cset, cgrp->root);  in cgroup_path_ns_locked()
2393 int cgroup_path_ns(struct cgroup *cgrp, char *buf, size_t buflen,  in cgroup_path_ns()
2668 int cgroup_migrate_vet_dst(struct cgroup *dst_cgrp)  in cgroup_migrate_vet_dst()
2745 			    struct cgroup *dst_cgrp,  in cgroup_migrate_add_src()
2748 	struct cgroup *src_cgrp;  in cgroup_migrate_add_src()
2888 int cgroup_attach_task(struct cgroup *dst_cgrp, struct task_struct *leader,  in cgroup_attach_task()
3011 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_controllers_show()
3020 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_subtree_control_show()
3035 static int cgroup_update_dfl_csses(struct cgroup *cgrp)  in cgroup_update_dfl_csses()
3039 	struct cgroup *dsct;  in cgroup_update_dfl_csses()
3105 void cgroup_lock_and_drain_offline(struct cgroup *cgrp)  in cgroup_lock_and_drain_offline()
3108 	struct cgroup *dsct;  in cgroup_lock_and_drain_offline()
3146 static void cgroup_save_control(struct cgroup *cgrp)  in cgroup_save_control()
3148 	struct cgroup *dsct;  in cgroup_save_control()
3166 static void cgroup_propagate_control(struct cgroup *cgrp)  in cgroup_propagate_control()
3168 	struct cgroup *dsct;  in cgroup_propagate_control()
3187 static void cgroup_restore_control(struct cgroup *cgrp)  in cgroup_restore_control()
3189 	struct cgroup *dsct;  in cgroup_restore_control()
3202 	struct cgroup *cgrp = css->cgroup;  in css_visible()
3224 static int cgroup_apply_control_enable(struct cgroup *cgrp)  in cgroup_apply_control_enable()
3226 	struct cgroup *dsct;  in cgroup_apply_control_enable()
3270 static void cgroup_apply_control_disable(struct cgroup *cgrp)  in cgroup_apply_control_disable()
3272 	struct cgroup *dsct;  in cgroup_apply_control_disable()
3315 static int cgroup_apply_control(struct cgroup *cgrp)  in cgroup_apply_control()
3340 static void cgroup_finalize_control(struct cgroup *cgrp, int ret)  in cgroup_finalize_control()
3350 static int cgroup_vet_subtree_control_enable(struct cgroup *cgrp, u16 enable)  in cgroup_vet_subtree_control_enable()
3396 	struct cgroup *cgrp, *child;  in cgroup_subtree_control_write()
3495 static int cgroup_enable_threaded(struct cgroup *cgrp)  in cgroup_enable_threaded()
3497 	struct cgroup *parent = cgroup_parent(cgrp);  in cgroup_enable_threaded()
3498 	struct cgroup *dom_cgrp = parent->dom_cgrp;  in cgroup_enable_threaded()
3499 	struct cgroup *dsct;  in cgroup_enable_threaded()
3544 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_type_show()
3561 	struct cgroup *cgrp;  in cgroup_type_write()
3582 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_max_descendants_show()
3596 	struct cgroup *cgrp;  in cgroup_max_descendants_write()
3625 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_max_depth_show()
3639 	struct cgroup *cgrp;  in cgroup_max_depth_write()
3668 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_events_show()
3678 	struct cgroup *cgroup = seq_css(seq)->cgroup;  in cgroup_stat_show()  local
3684 		   cgroup->nr_descendants);  in cgroup_stat_show()
3699 		css = rcu_dereference_raw(cgroup->subsys[ssid]);  in cgroup_stat_show()
3700 		dying_cnt[ssid] = cgroup->nr_dying_subsys[ssid];  in cgroup_stat_show()
3706 		   cgroup->nr_dying_descendants);  in cgroup_stat_show()
3725 static struct cgroup_subsys_state *cgroup_tryget_css(struct cgroup *cgrp,  in cgroup_tryget_css()
3741 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_extra_stat_show()
3759 				  struct cgroup *cgrp, int ssid)  in cgroup_local_stat_show()
3791 	struct cgroup __maybe_unused *cgrp = seq_css(seq)->cgroup;  in cpu_local_stat_show()
3803 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_io_pressure_show()
3810 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_memory_pressure_show()
3817 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_cpu_pressure_show()
3828 	struct cgroup *cgrp;  in pressure_write()
3881 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_irq_pressure_show()
3897 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_pressure_show()
3911 	struct cgroup *cgrp;  in cgroup_pressure_write()
3976 	struct cgroup *cgrp = seq_css(seq)->cgroup;  in cgroup_freeze_show()
3986 	struct cgroup *cgrp;  in cgroup_freeze_write()
4008 static void __cgroup_kill(struct cgroup *cgrp)  in __cgroup_kill()
4038 static void cgroup_kill(struct cgroup *cgrp)  in cgroup_kill()
4041 	struct cgroup *dsct;  in cgroup_kill()
4054 	struct cgroup *cgrp;  in cgroup_kill_write()
4122 	struct cgroup *cgrp = of->kn->parent->priv;  in cgroup_file_write()
4241 static int cgroup_add_file(struct cgroup_subsys_state *css, struct cgroup *cgrp,  in cgroup_add_file()
4283 			      struct cgroup *cgrp, struct cftype cfts[],  in cgroup_addrm_files()
4323 	struct cgroup *root = &ss->root->cgrp;  in cgroup_apply_cftypes()
4331 		struct cgroup *cgrp = css->cgroup;  in cgroup_apply_cftypes()
4984 		it->cset_pos = &css->cgroup->e_csets[css->ss->id];  in css_task_iter_start()
4986 		it->cset_pos = &css->cgroup->cset_links;  in css_task_iter_start()
5077 	struct cgroup *cgrp = seq_css(s)->cgroup;  in __cgroup_procs_start()
5101 	struct cgroup *cgrp = seq_css(s)->cgroup;  in cgroup_procs_start()
5122 static int cgroup_may_write(const struct cgroup *cgrp, struct super_block *sb)  in cgroup_may_write()
5138 static int cgroup_procs_write_permission(struct cgroup *src_cgrp,  in cgroup_procs_write_permission()
5139 					 struct cgroup *dst_cgrp,  in cgroup_procs_write_permission()
5143 	struct cgroup *com_cgrp = src_cgrp;  in cgroup_procs_write_permission()
5169 static int cgroup_attach_permissions(struct cgroup *src_cgrp,  in cgroup_attach_permissions()
5170 				     struct cgroup *dst_cgrp,  in cgroup_attach_permissions()
5194 	struct cgroup *src_cgrp, *dst_cgrp;  in __cgroup_procs_write()
5265 		.file_offset = offsetof(struct cgroup, procs_file),
5294 		.file_offset = offsetof(struct cgroup, events_file),
5337 		.file_offset = offsetof(struct cgroup, psi_files[PSI_IO]),
5345 		.file_offset = offsetof(struct cgroup, psi_files[PSI_MEM]),
5353 		.file_offset = offsetof(struct cgroup, psi_files[PSI_CPU]),
5362 		.file_offset = offsetof(struct cgroup, psi_files[PSI_IRQ]),
5405 	struct cgroup *cgrp = css->cgroup;  in css_free_rwork_fn()
5456 	struct cgroup *cgrp = css->cgroup;  in css_release_work_fn()
5464 		struct cgroup *parent_cgrp;  in css_release_work_fn()
5491 		struct cgroup *tcgrp;  in css_release_work_fn()
5532 			      struct cgroup_subsys *ss, struct cgroup *cgrp)  in init_and_link_css()
5539 	css->cgroup = cgrp;  in init_and_link_css()
5571 		rcu_assign_pointer(css->cgroup->subsys[ss->id], css);  in online_css()
5597 	RCU_INIT_POINTER(css->cgroup->subsys[ss->id], NULL);  in offline_css()
5599 	wake_up_all(&css->cgroup->offline_waitq);  in offline_css()
5601 	css->cgroup->nr_dying_subsys[ss->id]++;  in offline_css()
5608 		css->cgroup->nr_dying_subsys[ss->id]++;  in offline_css()
5621 static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,  in css_create()
5624 	struct cgroup *parent = cgroup_parent(cgrp);  in css_create()
5671 static struct cgroup *cgroup_create(struct cgroup *parent, const char *name,  in cgroup_create()
5675 	struct cgroup *cgrp, *tcgrp;  in cgroup_create()
5788 static bool cgroup_check_hierarchy_limits(struct cgroup *parent)  in cgroup_check_hierarchy_limits()
5790 	struct cgroup *cgroup;  in cgroup_check_hierarchy_limits()  local
5796 	for (cgroup = parent; cgroup; cgroup = cgroup_parent(cgroup)) {  in cgroup_check_hierarchy_limits()
5797 		if (cgroup->nr_descendants >= cgroup->max_descendants)  in cgroup_check_hierarchy_limits()
5800 		if (level >= cgroup->max_depth)  in cgroup_check_hierarchy_limits()
5813 	struct cgroup *parent, *cgrp;  in cgroup_mkdir()
5965 static int cgroup_destroy_locked(struct cgroup *cgrp)  in cgroup_destroy_locked()
5968 	struct cgroup *tcgrp, *parent = cgroup_parent(cgrp);  in cgroup_destroy_locked()
6039 	struct cgroup *cgrp;  in cgroup_rmdir()
6288 struct cgroup *cgroup_get_from_id(u64 id)  in cgroup_get_from_id()
6291 	struct cgroup *cgrp, *root_cgrp;  in cgroup_get_from_id()
6346 		struct cgroup *cgrp;  in proc_cgroup_show()
6425 static struct cgroup *cgroup_v1v2_get_from_file(struct file *f)  in cgroup_v1v2_get_from_file()
6433 	return css->cgroup;  in cgroup_v1v2_get_from_file()
6441 static struct cgroup *cgroup_get_from_file(struct file *f)  in cgroup_get_from_file()
6443 	struct cgroup *cgrp = cgroup_v1v2_get_from_file(f);  in cgroup_get_from_file()
6476 	struct cgroup *dst_cgrp = NULL;  in cgroup_css_set_fork()
6496 	f = fget_raw(kargs->cgroup);  in cgroup_css_set_fork()
6578 	struct cgroup *cgrp = kargs->cgrp;  in cgroup_css_set_put_fork()
6879 	struct cgroup *cgrp;  in css_tryget_online_from_dir()
6927 struct cgroup *cgroup_get_from_path(const char *path)  in cgroup_get_from_path()
6930 	struct cgroup *cgrp = ERR_PTR(-ENOENT);  in cgroup_get_from_path()
6931 	struct cgroup *root_cgrp;  in cgroup_get_from_path()
6967 struct cgroup *cgroup_v1v2_get_from_fd(int fd)  in cgroup_v1v2_get_from_fd()
6969 	struct cgroup *cgrp;  in cgroup_v1v2_get_from_fd()
6984 struct cgroup *cgroup_get_from_fd(int fd)  in cgroup_get_from_fd()
6986 	struct cgroup *cgrp = cgroup_v1v2_get_from_fd(fd);  in cgroup_get_from_fd()
7049 	struct cgroup *cgroup;  in cgroup_sk_alloc()  local
7054 		cgroup = &cgrp_dfl_root.cgrp;  in cgroup_sk_alloc()
7055 		cgroup_get(cgroup);  in cgroup_sk_alloc()
7064 			cgroup = cset->dfl_cgrp;  in cgroup_sk_alloc()
7070 	skcd->cgroup = cgroup;  in cgroup_sk_alloc()
7071 	cgroup_bpf_get(cgroup);  in cgroup_sk_alloc()
7077 	struct cgroup *cgrp = sock_cgroup_ptr(skcd);  in cgroup_sk_clone()
7090 	struct cgroup *cgrp = sock_cgroup_ptr(skcd);  in cgroup_sk_free()