[NETFILTER]: nf_conntrack: make print_conntrack function optional for l4protos

Allows to remove five empty implementations.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 1 insertions, 27 deletions

diff --git a/net/netfilter/nf_conntrack_proto_generic.c b/net/netfilter/nf_conntrack_proto_generic.c
index 13f81917964..22c5dcb6306 100644
--- a/net/netfilter/nf_conntrack_proto_generic.c
+++ b/net/netfilter/nf_conntrack_proto_generic.c
@@ -40,13 +40,6 @@ static int generic_print_tuple(struct seq_file *s,
 	return 0;
 }
 
-/* Print out the private part of the conntrack. */
-static int generic_print_conntrack(struct seq_file *s,
-				   const struct nf_conn *state)
-{
-	return 0;
-}
-
 /* Returns verdict for packet, or -1 for invalid. */
 static int packet(struct nf_conn *conntrack,
 		  const struct sk_buff *skb,
@@ -104,7 +97,6 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_generic __read_mostly =
 	.pkt_to_tuple		= generic_pkt_to_tuple,
 	.invert_tuple		= generic_invert_tuple,
 	.print_tuple		= generic_print_tuple,
-	.print_conntrack	= generic_print_conntrack,
 	.packet			= packet,
 	.new			= new,
 #ifdef CONFIG_SYSCTL
diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c
index 7ac60731956..38487541108 100644
--- a/net/netfilter/nf_conntrack_proto_udp.c
+++ b/net/netfilter/nf_conntrack_proto_udp.c
@@ -60,13 +60,6 @@ static int udp_print_tuple(struct seq_file *s,
 			  ntohs(tuple->dst.u.udp.port));
 }
 
-/* Print out the private part of the conntrack. */
-static int udp_print_conntrack(struct seq_file *s,
-			       const struct nf_conn *conntrack)
-{
-	return 0;
-}
-
 /* Returns verdict for packet, and may modify conntracktype */
 static int udp_packet(struct nf_conn *conntrack,
 		      const struct sk_buff *skb,
@@ -193,7 +186,6 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly =
 	.pkt_to_tuple		= udp_pkt_to_tuple,
 	.invert_tuple		= udp_invert_tuple,
 	.print_tuple		= udp_print_tuple,
-	.print_conntrack	= udp_print_conntrack,
 	.packet			= udp_packet,
 	.new			= udp_new,
 	.error			= udp_error,
@@ -221,7 +213,6 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6 __read_mostly =
 	.pkt_to_tuple		= udp_pkt_to_tuple,
 	.invert_tuple		= udp_invert_tuple,
 	.print_tuple		= udp_print_tuple,
-	.print_conntrack	= udp_print_conntrack,
 	.packet			= udp_packet,
 	.new			= udp_new,
 	.error			= udp_error,
diff --git a/net/netfilter/nf_conntrack_proto_udplite.c b/net/netfilter/nf_conntrack_proto_udplite.c
index 6518bcd17d6..070056d9bcd 100644
--- a/net/netfilter/nf_conntrack_proto_udplite.c
+++ b/net/netfilter/nf_conntrack_proto_udplite.c
@@ -59,13 +59,6 @@ static int udplite_print_tuple(struct seq_file *s,
 			  ntohs(tuple->dst.u.udp.port));
 }
 
-/* Print out the private part of the conntrack. */
-static int udplite_print_conntrack(struct seq_file *s,
-				   const struct nf_conn *conntrack)
-{
-	return 0;
-}
-
 /* Returns verdict for packet, and may modify conntracktype */
 static int udplite_packet(struct nf_conn *conntrack,
 			  const struct sk_buff *skb,
@@ -198,7 +191,6 @@ static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
 	.pkt_to_tuple		= udplite_pkt_to_tuple,
 	.invert_tuple		= udplite_invert_tuple,
 	.print_tuple		= udplite_print_tuple,
-	.print_conntrack	= udplite_print_conntrack,
 	.packet			= udplite_packet,
 	.new			= udplite_new,
 	.error			= udplite_error,
@@ -222,7 +214,6 @@ static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 __read_mostly =
 	.pkt_to_tuple		= udplite_pkt_to_tuple,
 	.invert_tuple		= udplite_invert_tuple,
 	.print_tuple		= udplite_print_tuple,
-	.print_conntrack	= udplite_print_conntrack,
 	.packet			= udplite_packet,
 	.new			= udplite_new,
 	.error			= udplite_error,
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index d54ca78502c..696074a037c 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -142,7 +142,7 @@ static int ct_seq_show(struct seq_file *s, void *v)
 		       ? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
 		return -ENOSPC;
 
-	if (l4proto->print_conntrack(s, conntrack))
+	if (l4proto->print_conntrack && l4proto->print_conntrack(s, conntrack))
 		return -ENOSPC;
 
 	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,