[IP_SOCKGLUE]: Remove most of the tcp specific calls

As DCCP needs to be called in the same spots.

Now we have a member in inet_sock (is_icsk), set at sock creation time from
struct inet_protosw->flags (if INET_PROTOSW_ICSK is set, like for TCP and
DCCP) to see if a struct sock instance is a inet_connection_sock for places
like the ones in ip_sockglue.c (v4 and v6) where we previously were looking if
sk_type was SOCK_STREAM, that is insufficient because we now use the same code
for DCCP, that has sk_type SOCK_DCCP.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 11 deletions

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index b6b63fa8454c..c63868dd2ca2 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -163,17 +163,17 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
 			sk_refcnt_debug_dec(sk);
 
 			if (sk->sk_protocol == IPPROTO_TCP) {
-				struct tcp_sock *tp = tcp_sk(sk);
+				struct inet_connection_sock *icsk = inet_csk(sk);
 
 				local_bh_disable();
 				sock_prot_dec_use(sk->sk_prot);
 				sock_prot_inc_use(&tcp_prot);
 				local_bh_enable();
 				sk->sk_prot = &tcp_prot;
-				inet_csk(sk)->icsk_af_ops = &ipv4_specific;
+				icsk->icsk_af_ops = &ipv4_specific;
 				sk->sk_socket->ops = &inet_stream_ops;
 				sk->sk_family = PF_INET;
-				tcp_sync_mss(sk, tp->pmtu_cookie);
+				tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
 			} else {
 				local_bh_disable();
 				sock_prot_dec_use(sk->sk_prot);
@@ -317,14 +317,15 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
 		}
 
 		retv = 0;
-		if (sk->sk_type == SOCK_STREAM) {
+		if (inet_sk(sk)->is_icsk) {
 			if (opt) {
-				struct tcp_sock *tp = tcp_sk(sk);
+				struct inet_connection_sock *icsk = inet_csk(sk);
 				if (!((1 << sk->sk_state) &
 				      (TCPF_LISTEN | TCPF_CLOSE))
 				    && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
-					tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
-					tcp_sync_mss(sk, tp->pmtu_cookie);
+					icsk->icsk_ext_hdr_len =
+						opt->opt_flen + opt->opt_nflen;
+					icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
 				}
 			}
 			opt = xchg(&np->opt, opt);
@@ -380,14 +381,15 @@ sticky_done:
 			goto done;
 update:
 		retv = 0;
-		if (sk->sk_type == SOCK_STREAM) {
+		if (inet_sk(sk)->is_icsk) {
 			if (opt) {
-				struct tcp_sock *tp = tcp_sk(sk);
+				struct inet_connection_sock *icsk = inet_csk(sk);
 				if (!((1 << sk->sk_state) &
 				      (TCPF_LISTEN | TCPF_CLOSE))
 				    && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
-					tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
-					tcp_sync_mss(sk, tp->pmtu_cookie);
+					icsk->icsk_ext_hdr_len =
+						opt->opt_flen + opt->opt_nflen;
+					icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
 				}
 			}
 			opt = xchg(&np->opt, opt);