NF_REPEAT is only needed from nf_conntrack_in() under a very specific
case required by the TCP protocol tracker, we can handle this case
without returning to the core hook path. Handling of NF_REPEAT from the
nf_reinject() is left untouched.
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
v1: New patch, not posted before, to get rid of NF_REPEAT handling from the
core.
net/netfilter/core.c | 2 --
net/netfilter/nf_conntrack_core.c | 11 ++++++-----
net/openvswitch/conntrack.c | 8 ++------
3 files changed, 8 insertions(+), 13 deletions(-)
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index bd9272eeccb5..de30e08d58f2 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -322,8 +322,6 @@ int nf_hook_slow(struct sk_buff *skb, struct nf_hook_state *state,
if (ret == 0)
ret = -EPERM;
return ret;
- case NF_REPEAT:
- continue;
case NF_QUEUE:
ret = nf_queue(skb, state, &entry, verdict);
if (ret == 1 && entry)
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index df2f5a3901df..de4b8a75f30b 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -1305,7 +1305,7 @@ nf_conntrack_in(struct net *net, u_int8_t pf, unsigned int hooknum,
if (skb->nfct)
goto out;
}
-
+repeat:
ct = resolve_normal_ct(net, tmpl, skb, dataoff, pf, protonum,
l3proto, l4proto, &set_reply, &ctinfo);
if (!ct) {
@@ -1345,11 +1345,12 @@ nf_conntrack_in(struct net *net, u_int8_t pf, unsigned int hooknum,
nf_conntrack_event_cache(IPCT_REPLY, ct);
out:
if (tmpl) {
- /* Special case: we have to repeat this hook, assign the
- * template again to this packet. We assume that this packet
- * has no conntrack assigned. This is used by nf_ct_tcp. */
+ /* Special case: TCP tracker reports an attempt to reopen a
+ * closed/aborted connection. We have to go back and create a
+ * fresh conntrack.
+ */
if (ret == NF_REPEAT)
- skb->nfct = (struct nf_conntrack *)tmpl;
+ goto repeat;
else
nf_ct_put(tmpl);
}
diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c
index 31045ef44a82..9b8a028b7dad 100644
--- a/net/openvswitch/conntrack.c
+++ b/net/openvswitch/conntrack.c
@@ -725,12 +725,8 @@ static int __ovs_ct_lookup(struct net *net, struct sw_flow_key *key,
skb->nfctinfo = IP_CT_NEW;
}
- /* Repeat if requested, see nf_iterate(). */
- do {
- err = nf_conntrack_in(net, info->family,
- NF_INET_PRE_ROUTING, skb);
- } while (err == NF_REPEAT);
-
+ err = nf_conntrack_in(net, info->family,
+ NF_INET_PRE_ROUTING, skb);
if (err != NF_ACCEPT)
return -ENOENT;
--
2.1.4
--
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