nf_conntrack_alter_reply doesn't do helper reassignment anymore.
Remove the comments that make this claim.
Furthermore, remove dead code from the function and place ot
in nf_conntrack.h.
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
---
include/net/netfilter/nf_conntrack.h | 14 ++++++++++----
net/netfilter/nf_conntrack_core.c | 18 ------------------
net/netfilter/nf_conntrack_helper.c | 7 +------
3 files changed, 11 insertions(+), 28 deletions(-)
diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
index 4085765c3370..cba3ccf03fcc 100644
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -160,10 +160,6 @@ static inline struct net *nf_ct_net(const struct nf_conn *ct)
return read_pnet(&ct->ct_net);
}
-/* Alter reply tuple (maybe alter helper). */
-void nf_conntrack_alter_reply(struct nf_conn *ct,
- const struct nf_conntrack_tuple *newreply);
-
/* Is this tuple taken? (ignoring any belonging to the given
conntrack). */
int nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
@@ -284,6 +280,16 @@ static inline bool nf_is_loopback_packet(const struct sk_buff *skb)
return skb->dev && skb->skb_iif && skb->dev->flags & IFF_LOOPBACK;
}
+static inline void nf_conntrack_alter_reply(struct nf_conn *ct,
+ const struct nf_conntrack_tuple *newreply)
+{
+ /* Must be unconfirmed, so not in hash table yet */
+ if (WARN_ON(nf_ct_is_confirmed(ct)))
+ return;
+
+ ct->tuplehash[IP_CT_DIR_REPLY].tuple = *newreply;
+}
+
#define nfct_time_stamp ((u32)(jiffies))
/* jiffies until ct expires, 0 if already expired */
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 9f6f2e643575..124136b5a79a 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -2042,24 +2042,6 @@ nf_conntrack_in(struct sk_buff *skb, const struct nf_hook_state *state)
}
EXPORT_SYMBOL_GPL(nf_conntrack_in);
-/* Alter reply tuple (maybe alter helper). This is for NAT, and is
- implicitly racy: see __nf_conntrack_confirm */
-void nf_conntrack_alter_reply(struct nf_conn *ct,
- const struct nf_conntrack_tuple *newreply)
-{
- struct nf_conn_help *help = nfct_help(ct);
-
- /* Should be unconfirmed, so not in hash table yet */
- WARN_ON(nf_ct_is_confirmed(ct));
-
- nf_ct_dump_tuple(newreply);
-
- ct->tuplehash[IP_CT_DIR_REPLY].tuple = *newreply;
- if (ct->master || (help && !hlist_empty(&help->expectations)))
- return;
-}
-EXPORT_SYMBOL_GPL(nf_conntrack_alter_reply);
-
/* Refresh conntrack for this many jiffies and do accounting if do_acct is 1 */
void __nf_ct_refresh_acct(struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index f22691f83853..4ed5878cb25b 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -194,12 +194,7 @@ int __nf_ct_try_assign_helper(struct nf_conn *ct, struct nf_conn *tmpl,
struct nf_conntrack_helper *helper = NULL;
struct nf_conn_help *help;
- /* We already got a helper explicitly attached. The function
- * nf_conntrack_alter_reply - in case NAT is in use - asks for looking
- * the helper up again. Since now the user is in full control of
- * making consistent helper configurations, skip this automatic
- * re-lookup, otherwise we'll lose the helper.
- */
+ /* We already got a helper explicitly attached (e.g. nft_ct) */
if (test_bit(IPS_HELPER_BIT, &ct->status))
return 0;
--
2.41.0
