fs/sysfs/group.c

34 static umode_t __first_visible(const struct attribute_group *grp, struct kobject *kobj)
37 		return grp->is_visible(kobj, grp->attrs[0], 0);
40 		return grp->is_bin_visible(kobj, grp->bin_attrs[0], 0);
45 static int create_files(struct kernfs_node *parent, struct kobject *kobj,
65 				mode = grp->is_visible(kobj, *attr, i);
95 				mode = grp->is_bin_visible(kobj, *bin_attr, i);
120 static int internal_create_group(struct kobject *kobj, int update,
128 	if (WARN_ON(!kobj || (!update && !kobj->sd)))
132 	if (unlikely(update && !kobj->sd))
137 			 kobj->name, grp->name ?: "");
141 	kobject_get_ownership(kobj, &uid, &gid);
143 		umode_t mode = __first_visible(grp, kobj);
151 			kn = kernfs_find_and_get(kobj->sd, grp->name);
154 					 kobj->name, grp->name);
158 				sysfs_remove_group(kobj, grp);
167 			kn = kernfs_create_dir_ns(kobj->sd, grp->name, mode,
168 						  uid, gid, kobj, NULL);
171 					sysfs_warn_dup(kobj->sd, grp->name);
176 		kn = kobj->sd;
180 	error = create_files(kn, kobj, uid, gid, grp, update);
195  * @kobj:	The kobject to create the group on
203 int sysfs_create_group(struct kobject *kobj,
206 	return internal_create_group(kobj, 0, grp);
210 static int internal_create_groups(struct kobject *kobj, int update,
220 		error = internal_create_group(kobj, update, groups[i]);
223 				sysfs_remove_group(kobj, groups[i]);
232  * @kobj:	The kobject to create the group on
243 int sysfs_create_groups(struct kobject *kobj,
246 	return internal_create_groups(kobj, 0, groups);
252  * @kobj:	The kobject to update the group on
261 int sysfs_update_groups(struct kobject *kobj,
264 	return internal_create_groups(kobj, 1, groups);
270  * @kobj:	The kobject to update the group on
279  * kobj's directory in sysfs) is not allowed.
286 int sysfs_update_group(struct kobject *kobj,
289 	return internal_create_group(kobj, 1, grp);
295  * @kobj:	kobject to remove the group from
301 void sysfs_remove_group(struct kobject *kobj,
304 	struct kernfs_node *parent = kobj->sd;
311 				 grp->name, kobject_name(kobj));
330  * @kobj:	The kobject for the groups to be removed from
335 void sysfs_remove_groups(struct kobject *kobj,
343 		sysfs_remove_group(kobj, groups[i]);
349  * @kobj:	The kobject containing the group.
356 int sysfs_merge_group(struct kobject *kobj,
366 	parent = kernfs_find_and_get(kobj->sd, grp->name);
370 	kobject_get_ownership(kobj, &uid, &gid);
387  * @kobj:	The kobject containing the group.
390 void sysfs_unmerge_group(struct kobject *kobj,
396 	parent = kernfs_find_and_get(kobj->sd, grp->name);
407  * @kobj:	The kobject containing the group.
412 int sysfs_add_link_to_group(struct kobject *kobj, const char *group_name,
418 	parent = kernfs_find_and_get(kobj->sd, group_name);
431  * @kobj:	The kobject containing the group.
435 void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name,
440 	parent = kernfs_find_and_get(kobj->sd, group_name);
451  * @kobj:		The kobject containing the group.
457 int compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj,
488 	link = kernfs_create_link(kobj->sd, symlink_name, entry);
490 		sysfs_warn_dup(kobj->sd, symlink_name);
540  * @kobj:	The kobject containing the group.
547 int sysfs_group_change_owner(struct kobject *kobj,
559 	if (!kobj->state_in_sysfs)
563 		grp_kn = kernfs_find_and_get(kobj->sd, grp->name);
565 		kernfs_get(kobj->sd);
566 		grp_kn = kobj->sd;
583  * @kobj:	The kobject containing the groups.
590 int sysfs_groups_change_owner(struct kobject *kobj,
596 	if (!kobj->state_in_sysfs)
603 		error = sysfs_group_change_owner(kobj, groups[i], kuid, kgid);