fusl/arch/generic/bits/statfs.h

struct statfs {
  unsigned long f_type, f_bsize;
  fsblkcnt_t f_blocks, f_bfree, f_bavail;
  fsfilcnt_t f_files, f_ffree;
  fsid_t f_fsid;
  unsigned long f_namelen, f_frsize, f_flags, f_spare[4];
};