[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>

7 files changed, 2 insertions, 44 deletions

diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
index acde9952cadf..543c02b74c96 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
@@ -121,7 +121,7 @@ static int ct_seq_show(struct seq_file *s, void *v)
                       ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
                 return -ENOSPC;
 
-        if (l4proto->print_conntrack(s, ct))
+        if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
                 return -ENOSPC;
 
         if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
index cd0d6690627e..4004a04c5510 100644
--- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
+++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
@@ -74,13 +74,6 @@ static int icmp_print_tuple(struct seq_file *s,
                           ntohs(tuple->src.u.icmp.id));
 }
 
-/* Print out the private part of the conntrack. */
-static int icmp_print_conntrack(struct seq_file *s,
-                                const struct nf_conn *conntrack)
-{
-        return 0;
-}
-
 /* Returns verdict for packet, or -1 for invalid. */
 static int icmp_packet(struct nf_conn *ct,
                        const struct sk_buff *skb,
@@ -309,7 +302,6 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp __read_mostly =
         .pkt_to_tuple           = icmp_pkt_to_tuple,
         .invert_tuple           = icmp_invert_tuple,
         .print_tuple            = icmp_print_tuple,
-        .print_conntrack        = icmp_print_conntrack,
         .packet                 = icmp_packet,
         .new                    = icmp_new,
         .error                  = icmp_error,
diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
index 02d60dfbab80..da924c6b5f06 100644
--- a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
@@ -75,13 +75,6 @@ static int icmpv6_print_tuple(struct seq_file *s,
                           ntohs(tuple->src.u.icmp.id));
 }
 
-/* Print out the private part of the conntrack. */
-static int icmpv6_print_conntrack(struct seq_file *s,
-                                  const struct nf_conn *conntrack)
-{
-        return 0;
-}
-
 /* Returns verdict for packet, or -1 for invalid. */
 static int icmpv6_packet(struct nf_conn *ct,
                        const struct sk_buff *skb,
@@ -275,7 +268,6 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6 __read_mostly =
         .pkt_to_tuple           = icmpv6_pkt_to_tuple,
         .invert_tuple           = icmpv6_invert_tuple,
         .print_tuple            = icmpv6_print_tuple,
-        .print_conntrack        = icmpv6_print_conntrack,
         .packet                 = icmpv6_packet,
         .new                    = icmpv6_new,
         .error                  = icmpv6_error,
diff --git a/net/netfilter/nf_conntrack_proto_generic.c b/net/netfilter/nf_conntrack_proto_generic.c
index 13f819179642..22c5dcb6306a 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 7ac607319562..384875411082 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 6518bcd17d65..070056d9bcd6 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 d54ca78502c4..696074a037c1 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,