What's the difference between sysfs_create_file() and sysfs_create_group()?

Question

The two functions' prototypes:

int sysfs_create_group(struct kobject *kobj, const struct attribute_group *grp)
int sysfs_create_file(struct kobject * kobj, const struct attribute * attr)

It seems to me that these two functions will both create attributes under the kobj->name directory in sysfs. The only difference I can find is, the group func can create a group of attributes in one time as the file func only one attribute. So are there other deferences？ Or is my understanding of the functions wrong?

Answer 1

Yes, the group is just a helper wrapper that makes it easier to manage multiple attributes. You can read about them in section 9 of this pdf.