VLAN_VID_MASK 64 include/linux/if_vlan.h #define VLAN_VID_MASK 0x0fff /* VLAN Identifier */ VLAN_VID_MASK 42 tools/testing/selftests/bpf/progs/test_xdp_vlan.c #define VLAN_VID_MASK 0x0fff /* VLAN Identifier */