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netfilter: conntrack: avoid calls to l4proto invert_tuple

Browse source 
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@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2018-06-29 07:46:48 +02:00 committed by Pablo Neira Ayuso
parent 6816d931ca
commit 8b3892ea87
8 changed files with 8 additions and 64 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
include/net/netfilter/nf_conntrack_l4proto.h
View file

@ -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);

8
net/netfilter/nf_conntrack_core.c
View file

@ -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);

10
net/netfilter/nf_conntrack_proto_dccp.c
View file

@ -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,

10
net/netfilter/nf_conntrack_proto_generic.c
View file

@ -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,

10
net/netfilter/nf_conntrack_proto_gre.c
View file

@ -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

10
net/netfilter/nf_conntrack_proto_sctp.c
View file

@ -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

10
net/netfilter/nf_conntrack_proto_tcp.c
View file

@ -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

12
net/netfilter/nf_conntrack_proto_udp.c
View file

@ -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,