278 static int rdtgroup_kn_set_ugid(struct kernfs_node *kn)  in rdtgroup_kn_set_ugid()  argument
288 	return kernfs_setattr(kn, &iattr);  in rdtgroup_kn_set_ugid()
293 	struct kernfs_node *kn;  in rdtgroup_add_file()  local
296 	kn = __kernfs_create_file(parent_kn, rft->name, rft->mode,  in rdtgroup_add_file()
299 	if (IS_ERR(kn))  in rdtgroup_add_file()
300 		return PTR_ERR(kn);  in rdtgroup_add_file()
302 	ret = rdtgroup_kn_set_ugid(kn);  in rdtgroup_add_file()
304 		kernfs_remove(kn);  in rdtgroup_add_file()
314 	struct rftype *rft = of->kn->priv;  in rdtgroup_seqfile_show()
324 	struct rftype *rft = of->kn->priv;  in rdtgroup_file_write()
345 	struct rftype *rft = of->kn->priv;  in is_cpu_list()
357 	rdtgrp = rdtgroup_kn_lock_live(of->kn);  in rdtgroup_cpus_show()
378 	rdtgroup_kn_unlock(of->kn);  in rdtgroup_cpus_show()
533 	rdtgrp = rdtgroup_kn_lock_live(of->kn);  in rdtgroup_cpus_write()
574 	rdtgroup_kn_unlock(of->kn);  in rdtgroup_cpus_write()
596 	kernfs_put(rdtgrp->kn);  in rdtgroup_remove()
777 	rdtgrp = rdtgroup_kn_lock_live(of->kn);  in rdtgroup_tasks_write()
779 		rdtgroup_kn_unlock(of->kn);  in rdtgroup_tasks_write()
814 	rdtgroup_kn_unlock(of->kn);  in rdtgroup_tasks_write()
841 	rdtgrp = rdtgroup_kn_lock_live(of->kn);  in rdtgroup_tasks_show()
846 	rdtgroup_kn_unlock(of->kn);  in rdtgroup_tasks_show()
857 	rdtgrp = rdtgroup_kn_lock_live(of->kn);  in rdtgroup_closid_show()
862 	rdtgroup_kn_unlock(of->kn);  in rdtgroup_closid_show()
873 	rdtgrp = rdtgroup_kn_lock_live(of->kn);  in rdtgroup_rmid_show()
878 	rdtgroup_kn_unlock(of->kn);  in rdtgroup_rmid_show()
944 			   rdt_kn_name(rdtg->kn));  in proc_resctrl_show()
951 			seq_printf(s, "%s", rdt_kn_name(crg->kn));  in proc_resctrl_show()
984 void *rdt_kn_parent_priv(struct kernfs_node *kn)  in rdt_kn_parent_priv()  argument
991 	return rcu_dereference(kn->__parent)->priv;  in rdt_kn_parent_priv()
997 	struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);  in rdt_num_closids_show()
1006 	struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);  in rdt_default_ctrl_show()
1016 	struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);  in rdt_min_cbm_bits_show()
1026 	struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);  in rdt_shareable_bits_show()
1050 	struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);  in rdt_bit_usage_show()
1149 	struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);  in rdt_min_bw_show()
1159 	struct rdt_resource *r = rdt_kn_parent_priv(of->kn);  in rdt_num_rmids_show()
1169 	struct rdt_resource *r = rdt_kn_parent_priv(of->kn);  in rdt_mon_features_show()
1187 	struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);  in rdt_bw_gran_show()
1197 	struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);  in rdt_delay_linear_show()
1215 	struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);  in rdt_thread_throttle_mode_show()
1261 	rdtgrp = rdtgroup_kn_lock_live(of->kn);  in rdtgroup_mode_show()
1263 		rdtgroup_kn_unlock(of->kn);  in rdtgroup_mode_show()
1269 	rdtgroup_kn_unlock(of->kn);  in rdtgroup_mode_show()
1289 	struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);  in rdt_has_sparse_bitmasks_show()
1451 	rdtgrp = rdtgroup_kn_lock_live(of->kn);  in rdtgroup_mode_write()
1453 		rdtgroup_kn_unlock(of->kn);  in rdtgroup_mode_write()
1504 	rdtgroup_kn_unlock(of->kn);  in rdtgroup_mode_write()
1576 	rdtgrp = rdtgroup_kn_lock_live(of->kn);  in rdtgroup_size_show()
1578 		rdtgroup_kn_unlock(of->kn);  in rdtgroup_size_show()
1630 	rdtgroup_kn_unlock(of->kn);  in rdtgroup_size_show()
1674 	struct rdt_resource *r = rdt_kn_parent_priv(of->kn);  in mbm_total_bytes_config_show()
1684 	struct rdt_resource *r = rdt_kn_parent_priv(of->kn);  in mbm_local_bytes_config_show()
1778 	struct rdt_resource *r = rdt_kn_parent_priv(of->kn);  in mbm_total_bytes_config_write()
1804 	struct rdt_resource *r = rdt_kn_parent_priv(of->kn);  in mbm_local_bytes_config_write()
1870 			return rdt_kn_name(rdtgrp->kn);  in rdtgroup_name_by_closid()
2121 static int rdtgroup_add_files(struct kernfs_node *kn, unsigned long fflags)  in rdtgroup_add_files()  argument
2136 			ret = rdtgroup_add_file(kn, rft);  in rdtgroup_add_files()
2147 			kernfs_remove_by_name(kn, rft->name);  in rdtgroup_add_files()
2236 	struct kernfs_node *kn;  in rdtgroup_kn_mode_restrict()  local
2239 	kn = kernfs_find_and_get_ns(r->kn, name, NULL);  in rdtgroup_kn_mode_restrict()
2240 	if (!kn)  in rdtgroup_kn_mode_restrict()
2243 	switch (kernfs_type(kn)) {  in rdtgroup_kn_mode_restrict()
2255 	ret = kernfs_setattr(kn, &iattr);  in rdtgroup_kn_mode_restrict()
2256 	kernfs_put(kn);  in rdtgroup_kn_mode_restrict()
2275 	struct kernfs_node *kn, *parent;  in rdtgroup_kn_mode_restore()  local
2287 	kn = kernfs_find_and_get_ns(r->kn, name, NULL);  in rdtgroup_kn_mode_restore()
2288 	if (!kn)  in rdtgroup_kn_mode_restore()
2291 	switch (kernfs_type(kn)) {  in rdtgroup_kn_mode_restore()
2293 		parent = kernfs_get_parent(kn);  in rdtgroup_kn_mode_restore()
2308 	ret = kernfs_setattr(kn, &iattr);  in rdtgroup_kn_mode_restore()
2309 	kernfs_put(kn);  in rdtgroup_kn_mode_restore()
2457 	struct kernfs_node *kn;  in mongroup_create_dir()  local
2461 	kn = kernfs_create_dir(parent_kn, name, parent_kn->mode, prgrp);  in mongroup_create_dir()
2462 	if (IS_ERR(kn))  in mongroup_create_dir()
2463 		return PTR_ERR(kn);  in mongroup_create_dir()
2466 		*dest_kn = kn;  in mongroup_create_dir()
2468 	ret = rdtgroup_kn_set_ugid(kn);  in mongroup_create_dir()
2472 	kernfs_activate(kn);  in mongroup_create_dir()
2477 	kernfs_remove(kn);  in mongroup_create_dir()
2564 static struct rdtgroup *kernfs_to_rdtgroup(struct kernfs_node *kn)  in kernfs_to_rdtgroup()  argument
2566 	if (kernfs_type(kn) == KERNFS_DIR) {  in kernfs_to_rdtgroup()
2573 		if (kn == kn_info ||  in kernfs_to_rdtgroup()
2574 		    rcu_access_pointer(kn->__parent) == kn_info)  in kernfs_to_rdtgroup()
2577 			return kn->priv;  in kernfs_to_rdtgroup()
2579 		return rdt_kn_parent_priv(kn);  in kernfs_to_rdtgroup()
2583 static void rdtgroup_kn_get(struct rdtgroup *rdtgrp, struct kernfs_node *kn)  in rdtgroup_kn_get()  argument
2586 	kernfs_break_active_protection(kn);  in rdtgroup_kn_get()
2589 static void rdtgroup_kn_put(struct rdtgroup *rdtgrp, struct kernfs_node *kn)  in rdtgroup_kn_put()  argument
2596 		kernfs_unbreak_active_protection(kn);  in rdtgroup_kn_put()
2599 		kernfs_unbreak_active_protection(kn);  in rdtgroup_kn_put()
2603 struct rdtgroup *rdtgroup_kn_lock_live(struct kernfs_node *kn)  in rdtgroup_kn_lock_live()  argument
2605 	struct rdtgroup *rdtgrp = kernfs_to_rdtgroup(kn);  in rdtgroup_kn_lock_live()
2610 	rdtgroup_kn_get(rdtgrp, kn);  in rdtgroup_kn_lock_live()
2622 void rdtgroup_kn_unlock(struct kernfs_node *kn)  in rdtgroup_kn_unlock()  argument
2624 	struct rdtgroup *rdtgrp = kernfs_to_rdtgroup(kn);  in rdtgroup_kn_unlock()
2632 	rdtgroup_kn_put(rdtgrp, kn);  in rdtgroup_kn_unlock()
2826 	ret = rdtgroup_add_files(rdtgroup_default.kn, flags);  in rdt_get_tree()
2830 	kernfs_activate(rdtgroup_default.kn);  in rdt_get_tree()
2832 	ret = rdtgroup_create_info_dir(rdtgroup_default.kn);  in rdt_get_tree()
2837 		ret = mongroup_create_dir(rdtgroup_default.kn,  in rdt_get_tree()
2845 		ret = mkdir_mondata_all(rdtgroup_default.kn,  in rdt_get_tree()
3076 		kernfs_remove(rdtgrp->kn);  in rmdir_all_sub()
3155 	if (!rdtgroup_default.kn)  in resctrl_fs_teardown()
3202 	struct kernfs_node *kn;  in mon_addfile()  local
3205 	kn = __kernfs_create_file(parent_kn, name, 0444,  in mon_addfile()
3208 	if (IS_ERR(kn))  in mon_addfile()
3209 		return PTR_ERR(kn);  in mon_addfile()
3211 	ret = rdtgroup_kn_set_ugid(kn);  in mon_addfile()
3213 		kernfs_remove(kn);  in mon_addfile()
3222 	struct kernfs_node *kn;  in mon_rmdir_one_subdir()  local
3224 	kn = kernfs_find_and_get(pkn, name);  in mon_rmdir_one_subdir()
3225 	if (!kn)  in mon_rmdir_one_subdir()
3227 	kernfs_put(kn);  in mon_rmdir_one_subdir()
3229 	if (kn->dir.subdirs <= 1)  in mon_rmdir_one_subdir()
3230 		kernfs_remove(kn);  in mon_rmdir_one_subdir()
3232 		kernfs_remove_by_name(kn, subname);  in mon_rmdir_one_subdir()
3297 	struct kernfs_node *kn;  in _mkdir_mondata_subdir()  local
3302 	kn = kernfs_create_dir(parent_kn, name, parent_kn->mode, prgrp);  in _mkdir_mondata_subdir()
3303 	if (IS_ERR(kn))  in _mkdir_mondata_subdir()
3304 		return kn;  in _mkdir_mondata_subdir()
3306 	ret = rdtgroup_kn_set_ugid(kn);  in _mkdir_mondata_subdir()
3319 		ret = mon_addfile(kn, mevt->name, priv);  in _mkdir_mondata_subdir()
3327 	return kn;  in _mkdir_mondata_subdir()
3329 	kernfs_remove(kn);  in _mkdir_mondata_subdir()
3337 	struct kernfs_node *ckn, *kn;  in mkdir_mondata_subdir_snc()  local
3346 	kn = kernfs_find_and_get(parent_kn, name);  in mkdir_mondata_subdir_snc()
3347 	if (kn) {  in mkdir_mondata_subdir_snc()
3352 		kernfs_put(kn);  in mkdir_mondata_subdir_snc()
3354 		kn = _mkdir_mondata_subdir(parent_kn, name, NULL, r, prgrp, d->ci_id);  in mkdir_mondata_subdir_snc()
3355 		if (IS_ERR(kn))  in mkdir_mondata_subdir_snc()
3356 			return PTR_ERR(kn);  in mkdir_mondata_subdir_snc()
3360 	ckn = _mkdir_mondata_subdir(kn, name, hdr, r, prgrp, hdr->id);  in mkdir_mondata_subdir_snc()
3362 		kernfs_remove(kn);  in mkdir_mondata_subdir_snc()
3366 	kernfs_activate(kn);  in mkdir_mondata_subdir_snc()
3374 	struct kernfs_node *kn;  in mkdir_mondata_subdir()  local
3383 	kn = _mkdir_mondata_subdir(parent_kn, name, hdr, r, prgrp, hdr->id);  in mkdir_mondata_subdir()
3384 	if (IS_ERR(kn))  in mkdir_mondata_subdir()
3385 		return PTR_ERR(kn);  in mkdir_mondata_subdir()
3387 	kernfs_activate(kn);  in mkdir_mondata_subdir()
3455 	struct kernfs_node *kn;  in mkdir_mondata_all()  local
3461 	ret = mongroup_create_dir(parent_kn, prgrp, "mon_data", &kn);  in mkdir_mondata_all()
3466 		*dest_kn = kn;  in mkdir_mondata_all()
3473 		ret = mkdir_mondata_subdir_alldom(kn, r, prgrp);  in mkdir_mondata_all()
3481 	kernfs_remove(kn);  in mkdir_mondata_all()
3686 	ret = mkdir_mondata_all(rdtgrp->kn, rdtgrp, &rdtgrp->mon.mon_data_kn);  in mkdir_rdt_prepare_rmid_alloc()
3715 static bool is_mon_groups(struct kernfs_node *kn, const char *name)  in is_mon_groups()  argument
3717 	return (!strcmp(rdt_kn_name(kn), "mon_groups") &&  in is_mon_groups()
3727 	struct kernfs_node *kn;  in mkdir_rdt_prepare()  local
3768 	kn = kernfs_create_dir(parent_kn, name, mode, rdtgrp);  in mkdir_rdt_prepare()
3769 	if (IS_ERR(kn)) {  in mkdir_rdt_prepare()
3770 		ret = PTR_ERR(kn);  in mkdir_rdt_prepare()
3774 	rdtgrp->kn = kn;  in mkdir_rdt_prepare()
3782 	kernfs_get(kn);  in mkdir_rdt_prepare()
3784 	ret = rdtgroup_kn_set_ugid(kn);  in mkdir_rdt_prepare()
3798 	ret = rdtgroup_add_files(kn, files);  in mkdir_rdt_prepare()
3810 	kernfs_put(rdtgrp->kn);  in mkdir_rdt_prepare()
3811 	kernfs_remove(rdtgrp->kn);  in mkdir_rdt_prepare()
3821 	kernfs_remove(rgrp->kn);  in mkdir_rdt_prepare_clean()
3849 	kernfs_activate(rdtgrp->kn);  in rdtgroup_mkdir_mon()
3870 	struct kernfs_node *kn;  in rdtgroup_mkdir_ctrl_mon()  local
3878 	kn = rdtgrp->kn;  in rdtgroup_mkdir_ctrl_mon()
3893 	kernfs_activate(rdtgrp->kn);  in rdtgroup_mkdir_ctrl_mon()
3906 		ret = mongroup_create_dir(kn, rdtgrp, "mon_groups", NULL);  in rdtgroup_mkdir_ctrl_mon()
3942 	if (resctrl_arch_alloc_capable() && parent_kn == rdtgroup_default.kn)  in rdtgroup_mkdir()
3989 	kernfs_remove(rdtgrp->kn);  in rdtgroup_rmdir_mon()
3999 	kernfs_remove(rdtgrp->kn);  in rdtgroup_ctrl_remove()
4043 static struct kernfs_node *rdt_kn_parent(struct kernfs_node *kn)  in rdt_kn_parent()  argument
4049 	return rcu_dereference_check(kn->__parent, lockdep_is_held(&rdtgroup_mutex));  in rdt_kn_parent()
4052 static int rdtgroup_rmdir(struct kernfs_node *kn)  in rdtgroup_rmdir()  argument
4062 	rdtgrp = rdtgroup_kn_lock_live(kn);  in rdtgroup_rmdir()
4067 	parent_kn = rdt_kn_parent(kn);  in rdtgroup_rmdir()
4076 	if (rdtgrp->type == RDTCTRL_GROUP && parent_kn == rdtgroup_default.kn &&  in rdtgroup_rmdir()
4085 		 is_mon_groups(parent_kn, rdt_kn_name(kn))) {  in rdtgroup_rmdir()
4092 	rdtgroup_kn_unlock(kn);  in rdtgroup_rmdir()
4133 static int rdtgroup_rename(struct kernfs_node *kn,  in rdtgroup_rename()  argument
4142 	rdtgrp = kernfs_to_rdtgroup(kn);  in rdtgroup_rename()
4148 	rdtgroup_kn_get(rdtgrp, kn);  in rdtgroup_rename()
4159 	if (kernfs_type(kn) != KERNFS_DIR ||  in rdtgroup_rename()
4171 	kn_parent = rdt_kn_parent(kn);  in rdtgroup_rename()
4173 	    !is_mon_groups(kn_parent, rdt_kn_name(kn))) {  in rdtgroup_rename()
4213 	ret = kernfs_rename(kn, new_parent, new_name);  in rdtgroup_rename()
4221 	rdtgroup_kn_put(rdtgrp, kn);  in rdtgroup_rename()
4260 	rdtgroup_default.kn = kernfs_root_to_node(rdt_root);  in rdtgroup_setup_root()
4270 	rdtgroup_default.kn = NULL;  in rdtgroup_destroy_root()