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Message-Id: <20180720130906.27687-13-pablo@netfilter.org>
Date: Fri, 20 Jul 2018 15:08:40 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netfilter-devel@...r.kernel.org
Cc: davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 12/38] netfilter: conntrack: avoid calls to l4proto invert_tuple
From: Florian Westphal <fw@...len.de>
Handle the common cases (tcp, udp, etc). in the core and only
do the indirect call for the protocols that need it (GRE for instance).
Signed-off-by: Florian Westphal <fw@...len.de>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
include/net/netfilter/nf_conntrack_l4proto.h | 2 +-
net/netfilter/nf_conntrack_core.c | 8 +++++++-
net/netfilter/nf_conntrack_proto_dccp.c | 10 ----------
net/netfilter/nf_conntrack_proto_generic.c | 10 ----------
net/netfilter/nf_conntrack_proto_gre.c | 10 ----------
net/netfilter/nf_conntrack_proto_sctp.c | 10 ----------
net/netfilter/nf_conntrack_proto_tcp.c | 10 ----------
net/netfilter/nf_conntrack_proto_udp.c | 12 ------------
8 files changed, 8 insertions(+), 64 deletions(-)
diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h
index a7220eef9aee..6a55e337a161 100644
--- a/include/net/netfilter/nf_conntrack_l4proto.h
+++ b/include/net/netfilter/nf_conntrack_l4proto.h
@@ -36,7 +36,7 @@ struct nf_conntrack_l4proto {
struct net *net, struct nf_conntrack_tuple *tuple);
/* Invert the per-proto part of the tuple: ie. turn xmit into reply.
- * Some packets can't be inverted: return 0 in that case.
+ * Only used by icmp, most protocols use a generic version.
*/
bool (*invert_tuple)(struct nf_conntrack_tuple *inverse,
const struct nf_conntrack_tuple *orig);
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 0674c6e5bfed..92efce69b690 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -400,7 +400,13 @@ nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
inverse->dst.dir = !orig->dst.dir;
inverse->dst.protonum = orig->dst.protonum;
- return l4proto->invert_tuple(inverse, orig);
+
+ if (unlikely(l4proto->invert_tuple))
+ return l4proto->invert_tuple(inverse, orig);
+
+ inverse->src.u.all = orig->dst.u.all;
+ inverse->dst.u.all = orig->src.u.all;
+ return true;
}
EXPORT_SYMBOL_GPL(nf_ct_invert_tuple);
diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c
index abe647d5b8c6..05620c03f138 100644
--- a/net/netfilter/nf_conntrack_proto_dccp.c
+++ b/net/netfilter/nf_conntrack_proto_dccp.c
@@ -403,14 +403,6 @@ static bool dccp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
return true;
}
-static bool dccp_invert_tuple(struct nf_conntrack_tuple *inv,
- const struct nf_conntrack_tuple *tuple)
-{
- inv->src.u.dccp.port = tuple->dst.u.dccp.port;
- inv->dst.u.dccp.port = tuple->src.u.dccp.port;
- return true;
-}
-
static bool dccp_new(struct nf_conn *ct, const struct sk_buff *skb,
unsigned int dataoff, unsigned int *timeouts)
{
@@ -865,7 +857,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp4 = {
.l3proto = AF_INET,
.l4proto = IPPROTO_DCCP,
.pkt_to_tuple = dccp_pkt_to_tuple,
- .invert_tuple = dccp_invert_tuple,
.new = dccp_new,
.packet = dccp_packet,
.get_timeouts = dccp_get_timeouts,
@@ -901,7 +892,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp6 = {
.l3proto = AF_INET6,
.l4proto = IPPROTO_DCCP,
.pkt_to_tuple = dccp_pkt_to_tuple,
- .invert_tuple = dccp_invert_tuple,
.new = dccp_new,
.packet = dccp_packet,
.get_timeouts = dccp_get_timeouts,
diff --git a/net/netfilter/nf_conntrack_proto_generic.c b/net/netfilter/nf_conntrack_proto_generic.c
index 6c6896d21cd7..4dfe40aa9446 100644
--- a/net/netfilter/nf_conntrack_proto_generic.c
+++ b/net/netfilter/nf_conntrack_proto_generic.c
@@ -41,15 +41,6 @@ static bool generic_pkt_to_tuple(const struct sk_buff *skb,
return true;
}
-static bool generic_invert_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_conntrack_tuple *orig)
-{
- tuple->src.u.all = 0;
- tuple->dst.u.all = 0;
-
- return true;
-}
-
static unsigned int *generic_get_timeouts(struct net *net)
{
return &(generic_pernet(net)->timeout);
@@ -168,7 +159,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_generic =
.l3proto = PF_UNSPEC,
.l4proto = 255,
.pkt_to_tuple = generic_pkt_to_tuple,
- .invert_tuple = generic_invert_tuple,
.packet = generic_packet,
.get_timeouts = generic_get_timeouts,
.new = generic_new,
diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c
index d049ea5a3770..0bd40eb06b55 100644
--- a/net/netfilter/nf_conntrack_proto_gre.c
+++ b/net/netfilter/nf_conntrack_proto_gre.c
@@ -179,15 +179,6 @@ EXPORT_SYMBOL_GPL(nf_ct_gre_keymap_destroy);
/* PUBLIC CONNTRACK PROTO HELPER FUNCTIONS */
-/* invert gre part of tuple */
-static bool gre_invert_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_conntrack_tuple *orig)
-{
- tuple->dst.u.gre.key = orig->src.u.gre.key;
- tuple->src.u.gre.key = orig->dst.u.gre.key;
- return true;
-}
-
/* gre hdr info to tuple */
static bool gre_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
struct net *net, struct nf_conntrack_tuple *tuple)
@@ -356,7 +347,6 @@ static const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre4 = {
.l3proto = AF_INET,
.l4proto = IPPROTO_GRE,
.pkt_to_tuple = gre_pkt_to_tuple,
- .invert_tuple = gre_invert_tuple,
#ifdef CONFIG_NF_CONNTRACK_PROCFS
.print_conntrack = gre_print_conntrack,
#endif
diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c
index fb9a35d16069..148957a5cf3e 100644
--- a/net/netfilter/nf_conntrack_proto_sctp.c
+++ b/net/netfilter/nf_conntrack_proto_sctp.c
@@ -166,14 +166,6 @@ static bool sctp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
return true;
}
-static bool sctp_invert_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_conntrack_tuple *orig)
-{
- tuple->src.u.sctp.port = orig->dst.u.sctp.port;
- tuple->dst.u.sctp.port = orig->src.u.sctp.port;
- return true;
-}
-
#ifdef CONFIG_NF_CONNTRACK_PROCFS
/* Print out the private part of the conntrack. */
static void sctp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
@@ -781,7 +773,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 = {
.l3proto = PF_INET,
.l4proto = IPPROTO_SCTP,
.pkt_to_tuple = sctp_pkt_to_tuple,
- .invert_tuple = sctp_invert_tuple,
#ifdef CONFIG_NF_CONNTRACK_PROCFS
.print_conntrack = sctp_print_conntrack,
#endif
@@ -818,7 +809,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 = {
.l3proto = PF_INET6,
.l4proto = IPPROTO_SCTP,
.pkt_to_tuple = sctp_pkt_to_tuple,
- .invert_tuple = sctp_invert_tuple,
#ifdef CONFIG_NF_CONNTRACK_PROCFS
.print_conntrack = sctp_print_conntrack,
#endif
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 8e67910185a0..03cff1e3066a 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -293,14 +293,6 @@ static bool tcp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
return true;
}
-static bool tcp_invert_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_conntrack_tuple *orig)
-{
- tuple->src.u.tcp.port = orig->dst.u.tcp.port;
- tuple->dst.u.tcp.port = orig->src.u.tcp.port;
- return true;
-}
-
#ifdef CONFIG_NF_CONNTRACK_PROCFS
/* Print out the private part of the conntrack. */
static void tcp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
@@ -1560,7 +1552,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp4 =
.l3proto = PF_INET,
.l4proto = IPPROTO_TCP,
.pkt_to_tuple = tcp_pkt_to_tuple,
- .invert_tuple = tcp_invert_tuple,
#ifdef CONFIG_NF_CONNTRACK_PROCFS
.print_conntrack = tcp_print_conntrack,
#endif
@@ -1598,7 +1589,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp6 =
.l3proto = PF_INET6,
.l4proto = IPPROTO_TCP,
.pkt_to_tuple = tcp_pkt_to_tuple,
- .invert_tuple = tcp_invert_tuple,
#ifdef CONFIG_NF_CONNTRACK_PROCFS
.print_conntrack = tcp_print_conntrack,
#endif
diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c
index fe7243970aa4..6fe2233c323a 100644
--- a/net/netfilter/nf_conntrack_proto_udp.c
+++ b/net/netfilter/nf_conntrack_proto_udp.c
@@ -55,14 +55,6 @@ static bool udp_pkt_to_tuple(const struct sk_buff *skb,
return true;
}
-static bool udp_invert_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_conntrack_tuple *orig)
-{
- tuple->src.u.udp.port = orig->dst.u.udp.port;
- tuple->dst.u.udp.port = orig->src.u.udp.port;
- return true;
-}
-
static unsigned int *udp_get_timeouts(struct net *net)
{
return udp_pernet(net)->timeouts;
@@ -302,7 +294,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 =
.l4proto = IPPROTO_UDP,
.allow_clash = true,
.pkt_to_tuple = udp_pkt_to_tuple,
- .invert_tuple = udp_invert_tuple,
.packet = udp_packet,
.get_timeouts = udp_get_timeouts,
.new = udp_new,
@@ -334,7 +325,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 =
.l4proto = IPPROTO_UDPLITE,
.allow_clash = true,
.pkt_to_tuple = udp_pkt_to_tuple,
- .invert_tuple = udp_invert_tuple,
.packet = udp_packet,
.get_timeouts = udp_get_timeouts,
.new = udp_new,
@@ -366,7 +356,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6 =
.l4proto = IPPROTO_UDP,
.allow_clash = true,
.pkt_to_tuple = udp_pkt_to_tuple,
- .invert_tuple = udp_invert_tuple,
.packet = udp_packet,
.get_timeouts = udp_get_timeouts,
.new = udp_new,
@@ -398,7 +387,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 =
.l4proto = IPPROTO_UDPLITE,
.allow_clash = true,
.pkt_to_tuple = udp_pkt_to_tuple,
- .invert_tuple = udp_invert_tuple,
.packet = udp_packet,
.get_timeouts = udp_get_timeouts,
.new = udp_new,
--
2.11.0
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