proto: struct thread *td, struct quotactl_args *uap
parms: td, uap
errors:
  - EOPNOTSUPP
  - EUSERS
  - EINVAL
  - EACCES
  - ENOTDIR
  - ENAMETOOLONG
  - ENOENT
  - ELOOP
  - EROFS
  - EIO
  - EFAULT
  - EPERM
profiles:
  - fs
