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netfilter: add and use nf_ct_set helper 

Add a helper to assign a nf_conn entry and the ctinfo bits to an sk_buff.
This avoids changing code in followup patch that merges skb->nfct and
skb->nfctinfo into skb->_nfct.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2017-01-23 18:21:57 +01:00 committed by Pablo Neira Ayuso
parent cb9c68363e
commit c74454fadd
12 changed files with 24 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/ip_vs.h
View File

@ -1559,8 +1559,7 @@ static inline void ip_vs_notrack(struct sk_buff *skb)
nf_conntrack_put(&ct->ct_general);
untracked = nf_ct_untracked_get();
nf_conntrack_get(&untracked->ct_general);
skb->nfct = &untracked->ct_general;
skb->nfctinfo = IP_CT_NEW;
nf_ct_set(skb, untracked, IP_CT_NEW);
}
#endif
}

8
include/net/netfilter/nf_conntrack.h
View File

@ -34,6 +34,7 @@ union nf_conntrack_proto {
struct ip_ct_sctp sctp;
struct ip_ct_tcp tcp;
struct nf_ct_gre gre;
unsigned int tmpl_padto;
};
union nf_conntrack_expect_proto {
@ -341,6 +342,13 @@ struct nf_conn *nf_ct_tmpl_alloc(struct net *net,
gfp_t flags);
void nf_ct_tmpl_free(struct nf_conn *tmpl);
static inline void
nf_ct_set(struct sk_buff *skb, struct nf_conn *ct, enum ip_conntrack_info info)
{
skb->nfct = &ct->ct_general;
skb->nfctinfo = info;
}
#define NF_CT_STAT_INC(net, count) __this_cpu_inc((net)->ct.stat->count)
#define NF_CT_STAT_INC_ATOMIC(net, count) this_cpu_inc((net)->ct.stat->count)
#define NF_CT_STAT_ADD_ATOMIC(net, count, v) this_cpu_add((net)->ct.stat->count, (v))

3
net/ipv4/netfilter/ipt_SYNPROXY.c
View File

@ -57,8 +57,7 @@ synproxy_send_tcp(struct net *net,
goto free_nskb;
if (nfct) {
nskb->nfct = nfct;
nskb->nfctinfo = ctinfo;
nf_ct_set(nskb, (struct nf_conn *)nfct, ctinfo);
nf_conntrack_get(nfct);
}

3
net/ipv4/netfilter/nf_conntrack_proto_icmp.c
View File

@ -172,8 +172,7 @@ icmp_error_message(struct net *net, struct nf_conn *tmpl, struct sk_buff *skb,
ctinfo += IP_CT_IS_REPLY;
/* Update skb to refer to this connection */
skb->nfct = &nf_ct_tuplehash_to_ctrack(h)->ct_general;
skb->nfctinfo = ctinfo;
nf_ct_set(skb, nf_ct_tuplehash_to_ctrack(h), ctinfo);
return NF_ACCEPT;
}

3
net/ipv4/netfilter/nf_dup_ipv4.c
View File

@ -69,8 +69,7 @@ void nf_dup_ipv4(struct net *net, struct sk_buff *skb, unsigned int hooknum,
#if IS_ENABLED(CONFIG_NF_CONNTRACK)
/* Avoid counting cloned packets towards the original connection. */
nf_reset(skb);
skb->nfct = &nf_ct_untracked_get()->ct_general;
skb->nfctinfo = IP_CT_NEW;
nf_ct_set(skb, nf_ct_untracked_get(), IP_CT_NEW);
nf_conntrack_get(skb_nfct(skb));
#endif
/*

3
net/ipv6/netfilter/ip6t_SYNPROXY.c
View File

@ -71,8 +71,7 @@ synproxy_send_tcp(struct net *net,
skb_dst_set(nskb, dst);
if (nfct) {
nskb->nfct = nfct;
nskb->nfctinfo = ctinfo;
nf_ct_set(nskb, (struct nf_conn *)nfct, ctinfo);
nf_conntrack_get(nfct);
}

6
net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
View File

@ -189,8 +189,7 @@ icmpv6_error_message(struct net *net, struct nf_conn *tmpl,
}
/* Update skb to refer to this connection */
skb->nfct = &nf_ct_tuplehash_to_ctrack(h)->ct_general;
skb->nfctinfo = ctinfo;
nf_ct_set(skb, nf_ct_tuplehash_to_ctrack(h), ctinfo);
return NF_ACCEPT;
}
@ -222,8 +221,7 @@ icmpv6_error(struct net *net, struct nf_conn *tmpl,
type = icmp6h->icmp6_type - 130;
if (type >= 0 && type < sizeof(noct_valid_new) &&
noct_valid_new[type]) {
skb->nfct = &nf_ct_untracked_get()->ct_general;
skb->nfctinfo = IP_CT_NEW;
nf_ct_set(skb, nf_ct_untracked_get(), IP_CT_NEW);
nf_conntrack_get(skb_nfct(skb));
return NF_ACCEPT;
}

3
net/ipv6/netfilter/nf_dup_ipv6.c
View File

@ -58,8 +58,7 @@ void nf_dup_ipv6(struct net *net, struct sk_buff *skb, unsigned int hooknum,
#if IS_ENABLED(CONFIG_NF_CONNTRACK)
nf_reset(skb);
skb->nfct = &nf_ct_untracked_get()->ct_general;
skb->nfctinfo = IP_CT_NEW;
nf_ct_set(skb, nf_ct_untracked_get(), IP_CT_NEW);
nf_conntrack_get(skb->nfct);
#endif
if (hooknum == NF_INET_PRE_ROUTING ||

11
net/netfilter/nf_conntrack_core.c
View File

@ -691,10 +691,7 @@ static int nf_ct_resolve_clash(struct net *net, struct sk_buff *skb,
nf_ct_acct_merge(ct, ctinfo, loser_ct);
nf_conntrack_put(&loser_ct->ct_general);
/* Assign conntrack already in hashes to this skbuff. Don't
* modify skb->nfctinfo to ensure consistent stateful filtering.
*/
skb->nfct = &ct->ct_general;
nf_ct_set(skb, ct, oldinfo);
return NF_ACCEPT;
}
NF_CT_STAT_INC(net, drop);
@ -1282,8 +1279,7 @@ resolve_normal_ct(struct net *net, struct nf_conn *tmpl,
}
*set_reply = 0;
}
skb->nfct = &ct->ct_general;
skb->nfctinfo = *ctinfo;
nf_ct_set(skb, ct, *ctinfo);
return ct;
}
@ -1526,8 +1522,7 @@ static void nf_conntrack_attach(struct sk_buff *nskb, const struct sk_buff *skb)
ctinfo = IP_CT_RELATED;
/* Attach to new skbuff, and increment count */
nskb->nfct = &ct->ct_general;
nskb->nfctinfo = ctinfo;
nf_ct_set(nskb, ct, ctinfo);
nf_conntrack_get(skb_nfct(nskb));
}

3
net/netfilter/nft_ct.c
View File

@ -554,8 +554,7 @@ static void nft_notrack_eval(const struct nft_expr *expr,
ct = nf_ct_untracked_get();
atomic_inc(&ct->ct_general.use);
skb->nfct = &ct->ct_general;
skb->nfctinfo = IP_CT_NEW;
nf_ct_set(skb, ct, IP_CT_NEW);
}
static struct nft_expr_type nft_notrack_type;

6
net/netfilter/xt_CT.c
View File

@ -30,8 +30,7 @@ static inline int xt_ct_target(struct sk_buff *skb, struct nf_conn *ct)
if (!ct)
ct = nf_ct_untracked_get();
atomic_inc(&ct->ct_general.use);
skb->nfct = &ct->ct_general;
skb->nfctinfo = IP_CT_NEW;
nf_ct_set(skb, ct, IP_CT_NEW);
return XT_CONTINUE;
}
@ -413,8 +412,7 @@ notrack_tg(struct sk_buff *skb, const struct xt_action_param *par)
if (skb->nfct != NULL)
return XT_CONTINUE;
skb->nfct = &nf_ct_untracked_get()->ct_general;
skb->nfctinfo = IP_CT_NEW;
nf_ct_set(skb, nf_ct_untracked_get(), IP_CT_NEW);
nf_conntrack_get(skb_nfct(skb));
return XT_CONTINUE;

6
net/openvswitch/conntrack.c
View File

@ -460,8 +460,7 @@ ovs_ct_find_existing(struct net *net, const struct nf_conntrack_zone *zone,
ct = nf_ct_tuplehash_to_ctrack(h);
skb->nfct = &ct->ct_general;
skb->nfctinfo = ovs_ct_get_info(h);
nf_ct_set(skb, ct, ovs_ct_get_info(h));
return ct;
}
@ -724,8 +723,7 @@ static int __ovs_ct_lookup(struct net *net, struct sw_flow_key *key,
if (skb_nfct(skb))
nf_conntrack_put(skb_nfct(skb));
nf_conntrack_get(&tmpl->ct_general);
skb->nfct = &tmpl->ct_general;
skb->nfctinfo = IP_CT_NEW;
nf_ct_set(skb, tmpl, IP_CT_NEW);
}
err = nf_conntrack_in(net, info->family,