inet: rename some inet_sock fields

In order to have better cache layouts of struct sock (separate zones
for rx/tx paths), we need this preliminary patch.

Goal is to transfert fields used at lookup time in the first
read-mostly cache line (inside struct sock_common) and move sk_refcnt
to a separate cache line (only written by rx path)

This patch adds inet_ prefix to daddr, rcv_saddr, dport, num, saddr,
sport and id fields. This allows a future patch to define these
fields as macros, like sk_refcnt, without name clashes.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 0c0b6e3..c602d98 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -245,7 +245,7 @@
 {
 	struct ip_ra_chain *ra, *new_ra, **rap;
 
-	if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num == IPPROTO_RAW)
+	if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num == IPPROTO_RAW)
 		return -EINVAL;
 
 	new_ra = on ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
@@ -492,7 +492,7 @@
 			if (sk->sk_family == PF_INET ||
 			    (!((1 << sk->sk_state) &
 			       (TCPF_LISTEN | TCPF_CLOSE)) &&
-			     inet->daddr != LOOPBACK4_IPV6)) {
+			     inet->inet_daddr != LOOPBACK4_IPV6)) {
 #endif
 				if (inet->opt)
 					icsk->icsk_ext_hdr_len -= inet->opt->optlen;
@@ -1181,8 +1181,8 @@
 		if (inet->cmsg_flags & IP_CMSG_PKTINFO) {
 			struct in_pktinfo info;
 
-			info.ipi_addr.s_addr = inet->rcv_saddr;
-			info.ipi_spec_dst.s_addr = inet->rcv_saddr;
+			info.ipi_addr.s_addr = inet->inet_rcv_saddr;
+			info.ipi_spec_dst.s_addr = inet->inet_rcv_saddr;
 			info.ipi_ifindex = inet->mc_index;
 			put_cmsg(&msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
 		}