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netfilter: conntrack: remove ctnetlink callbacks from l3 protocol trackers

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handle everything from ctnetlink directly.

After all these years we still only support ipv4 and ipv6, so it
seems reasonable to remove l3 protocol tracker support and instead
handle ipv4/ipv6 from a common, always builtin inet tracker.

Step 1: Get rid of all the l3proto->func() calls.

Start with ctnetlink, then move on to packet-path ones.

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 07:46:44 +02:00
committed by Pablo Neira Ayuso
parent 7414d929bc
commit f957be9d34
11 changed files with 79 additions and 149 deletions
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48
net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
View File

@@ -269,41 +269,6 @@ ipv6_getorigdst(struct sock *sk, int optval, void __user *user, int *len)
return copy_to_user(user, &sin6, sizeof(sin6)) ? -EFAULT : 0;
}
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nfnetlink_conntrack.h>
static int ipv6_tuple_to_nlattr(struct sk_buff *skb,
const struct nf_conntrack_tuple *tuple)
{
if (nla_put_in6_addr(skb, CTA_IP_V6_SRC, &tuple->src.u3.in6) ||
nla_put_in6_addr(skb, CTA_IP_V6_DST, &tuple->dst.u3.in6))
goto nla_put_failure;
return 0;
nla_put_failure:
return -1;
}
static const struct nla_policy ipv6_nla_policy[CTA_IP_MAX+1] = {
[CTA_IP_V6_SRC] = { .len = sizeof(u_int32_t)*4 },
[CTA_IP_V6_DST] = { .len = sizeof(u_int32_t)*4 },
};
static int ipv6_nlattr_to_tuple(struct nlattr *tb[],
struct nf_conntrack_tuple *t)
{
if (!tb[CTA_IP_V6_SRC] || !tb[CTA_IP_V6_DST])
return -EINVAL;
t->src.u3.in6 = nla_get_in6_addr(tb[CTA_IP_V6_SRC]);
t->dst.u3.in6 = nla_get_in6_addr(tb[CTA_IP_V6_DST]);
return 0;
}
#endif
static int ipv6_hooks_register(struct net *net)
{
struct conntrack6_net *cnet = net_generic(net, conntrack6_net_id);
@@ -345,13 +310,6 @@ const struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 = {
.pkt_to_tuple = ipv6_pkt_to_tuple,
.invert_tuple = ipv6_invert_tuple,
.get_l4proto = ipv6_get_l4proto,
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
.tuple_to_nlattr = ipv6_tuple_to_nlattr,
.nlattr_to_tuple = ipv6_nlattr_to_tuple,
.nla_policy = ipv6_nla_policy,
.nla_size = NLA_ALIGN(NLA_HDRLEN + sizeof(u32[4])) +
NLA_ALIGN(NLA_HDRLEN + sizeof(u32[4])),
#endif
.net_ns_get = ipv6_hooks_register,
.net_ns_put = ipv6_hooks_unregister,
.me = THIS_MODULE,
@@ -409,12 +367,6 @@ static int __init nf_conntrack_l3proto_ipv6_init(void)
need_conntrack();
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
if (WARN_ON(nla_policy_len(ipv6_nla_policy, CTA_IP_MAX + 1) !=
nf_conntrack_l3proto_ipv6.nla_size))
return -EINVAL;
#endif
ret = nf_register_sockopt(&so_getorigdst6);
if (ret < 0) {
pr_err("Unable to register netfilter socket option\n");

1
net/ipv6/netfilter/nf_defrag_ipv6_hooks.c
View File

@@ -23,7 +23,6 @@
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
#endif