VXFS_TYPED_OFFSETMASK
off = fs64_to_cpu(sbi, typ->vt_hdr) & VXFS_TYPED_OFFSETMASK;
int64_t off = (hdr & VXFS_TYPED_OFFSETMASK);
printk("offset=%Lx ", typ->vt_hdr & VXFS_TYPED_OFFSETMASK);