GOODCOPY_LEN 670 drivers/net/tap.c tap16_to_cpu(q, vnet_hdr.hdr_len) : GOODCOPY_LEN; GOODCOPY_LEN 1806 drivers/net/tun.c copylen = gso.hdr_len ? tun16_to_cpu(tun, gso.hdr_len) : GOODCOPY_LEN;