net: rename local_df to ignore_df

As suggested by several people, rename local_df to ignore_df,
since it means "ignore df bit if it is set".

Cc: Maciej Żenczykowski <maze@google.com>
Cc: Florian Westphal <fw@strlen.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ip.h b/include/net/ip.h
index 16146b6..5575298 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -269,7 +269,7 @@
 	return inet_sk(sk)->pmtudisc < IP_PMTUDISC_PROBE;
 }
 
-static inline bool ip_sk_local_df(const struct sock *sk)
+static inline bool ip_sk_ignore_df(const struct sock *sk)
 {
 	return inet_sk(sk)->pmtudisc < IP_PMTUDISC_DO ||
 	       inet_sk(sk)->pmtudisc == IP_PMTUDISC_OMIT;
@@ -304,7 +304,7 @@
 {
 	struct iphdr *iph = ip_hdr(skb);
 
-	if ((iph->frag_off & htons(IP_DF)) && !skb->local_df) {
+	if ((iph->frag_off & htons(IP_DF)) && !skb->ignore_df) {
 		/* This is only to work around buggy Windows95/2000
 		 * VJ compression implementations.  If the ID field
 		 * does not change, they drop every other packet in
@@ -320,7 +320,7 @@
 {
 	struct iphdr *iph = ip_hdr(skb);
 
-	if ((iph->frag_off & htons(IP_DF)) && !skb->local_df) {
+	if ((iph->frag_off & htons(IP_DF)) && !skb->ignore_df) {
 		if (sk && inet_sk(sk)->inet_daddr) {
 			iph->id = htons(inet_sk(sk)->inet_id);
 			inet_sk(sk)->inet_id += 1 + more;