ffs_statvfs
.vfs_statvfs = ffs_statvfs,
error = ffs_statvfs(mp, &mp->mnt_stat);
(void)ffs_statvfs(mp, &mp->mnt_stat);
ffs_statvfs(mp, &mp->mnt_stat);
(void)ffs_statvfs(mp, &mp->mnt_stat);
error = ffs_statvfs(mp, sbp);