IF_OPER_UNKNOWN 1369 include/linux/netdevice.h dev->operstate == IF_OPER_UNKNOWN /* backward compat */); IF_OPER_UNKNOWN 533 net/core/rtnetlink.c operstate == IF_OPER_UNKNOWN) && IF_OPER_UNKNOWN 540 net/core/rtnetlink.c operstate == IF_OPER_UNKNOWN)