sysctl_ip_fwd_use_pmtu 443 include/net/ip.h if (net->ipv4.sysctl_ip_fwd_use_pmtu || sysctl_ip_fwd_use_pmtu 101 include/net/netns/ipv4.h int sysctl_ip_fwd_use_pmtu; sysctl_ip_fwd_use_pmtu 1398 net/ipv4/route.c if (dev_net(dev)->ipv4.sysctl_ip_fwd_use_pmtu || sysctl_ip_fwd_use_pmtu 753 net/ipv4/sysctl_net_ipv4.c .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,