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netfilter: conntrack: remove pkt_to_tuple callback 

GRE is now builtin, so we can handle it via direct call and
remove the callback.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2019-01-15 22:03:37 +01:00 committed by Pablo Neira Ayuso
parent 751fc301ec
commit df5e162908
5 changed files with 8 additions and 21 deletions
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2
include/linux/netfilter/nf_conntrack_proto_gre.h
View File

@ -30,5 +30,7 @@ void nf_ct_gre_keymap_flush(struct net *net);
/* delete keymap entries */
void nf_ct_gre_keymap_destroy(struct nf_conn *ct);
bool gre_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
struct net *net, struct nf_conntrack_tuple *tuple);
#endif /* __KERNEL__ */
#endif /* _CONNTRACK_PROTO_GRE_H */

5
include/net/netfilter/nf_conntrack_l4proto.h
View File

@ -27,11 +27,6 @@ struct nf_conntrack_l4proto {
/* protoinfo nlattr size, closes a hole */
u16 nlattr_size;
/* Try to fill in the third arg: dataoff is offset past network protocol
hdr. Return true if possible. */
bool (*pkt_to_tuple)(const struct sk_buff *skb, unsigned int dataoff,
struct net *net, struct nf_conntrack_tuple *tuple);
/* Invert the per-proto part of the tuple: ie. turn xmit into reply.
* Only used by icmp, most protocols use a generic version.
*/

6
net/netfilter/nf_conntrack_core.c
View File

@ -279,9 +279,11 @@ nf_ct_get_tuple(const struct sk_buff *skb,
return icmpv6_pkt_to_tuple(skb, dataoff, net, tuple);
case IPPROTO_ICMP:
return icmp_pkt_to_tuple(skb, dataoff, net, tuple);
#ifdef CONFIG_NF_CT_PROTO_GRE
case IPPROTO_GRE:
return gre_pkt_to_tuple(skb, dataoff, net, tuple);
#endif
}
if (unlikely(l4proto->pkt_to_tuple))
return l4proto->pkt_to_tuple(skb, dataoff, net, tuple);
/* Actually only need first 4 bytes to get ports. */
inet_hdr = skb_header_pointer(skb, dataoff, sizeof(_inet_hdr), &_inet_hdr);

11
net/netfilter/nf_conntrack_proto_generic.c
View File

@ -27,16 +27,6 @@ static bool nf_generic_should_process(u8 proto)
}
}
static bool generic_pkt_to_tuple(const struct sk_buff *skb,
unsigned int dataoff,
struct net *net, struct nf_conntrack_tuple *tuple)
{
tuple->src.u.all = 0;
tuple->dst.u.all = 0;
return true;
}
/* Returns verdict for packet, or -1 for invalid. */
static int generic_packet(struct nf_conn *ct,
struct sk_buff *skb,
@ -149,7 +139,6 @@ static struct nf_proto_net *generic_get_net_proto(struct net *net)
const struct nf_conntrack_l4proto nf_conntrack_l4proto_generic =
{
.l4proto = 255,
.pkt_to_tuple = generic_pkt_to_tuple,
.packet = generic_packet,
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
.ctnl_timeout = {

5
net/netfilter/nf_conntrack_proto_gre.c
View File

@ -162,8 +162,8 @@ EXPORT_SYMBOL_GPL(nf_ct_gre_keymap_destroy);
/* PUBLIC CONNTRACK PROTO HELPER FUNCTIONS */
/* 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)
bool gre_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
struct net *net, struct nf_conntrack_tuple *tuple)
{
const struct pptp_gre_header *pgrehdr;
struct pptp_gre_header _pgrehdr;
@ -368,7 +368,6 @@ static int gre_init_net(struct net *net)
/* protocol helper struct */
const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre = {
.l4proto = IPPROTO_GRE,
.pkt_to_tuple = gre_pkt_to_tuple,
#ifdef CONFIG_NF_CONNTRACK_PROCFS
.print_conntrack = gre_print_conntrack,
#endif