The InoIdx block probably shouldn't have a phys address,
but we must be certainly it doesn't after a grow caused it to
not be an InoIdx block any more, else accounting will get
confused when we allocate it to another block.
ib->b.parent = new;
getiref(new, MKREF(child));
+ clear_bit(B_PhysValid, &ib->b.flags);
+ ib->b.physaddr = 0;
+
ibuf = map_iblock(new);
memcpy(ib->data, ibuf + offset, blksize - offset);
memset(ib->data + blksize - offset, 0, offset);