xfblob_bytes
xfblob_bytes(rx->xattr_blobs);
ASSERT(xfblob_bytes(rx->xattr_blobs) == 0);
bytes = xfarray_bytes(rd->dir_entries) + xfblob_bytes(rd->dir_names);
xfblob_bytes(rp->xattr_blobs);
bytes = xfarray_bytes(rp->pptr_recs) + xfblob_bytes(rp->pptr_names);
unsigned long long xfblob_bytes(struct xfblob *blob);