ethtool_set_speed   46 src/udev/net/ethtool-util.h int ethtool_set_speed(int *fd, const char *ifname, unsigned int speed, Duplex duplex);
ethtool_set_speed  343 src/udev/net/link-config.c         r = ethtool_set_speed(&ctx->ethtool_fd, old_name, config->speed / 1024,