netdev - [PATCH v2 4.14 1/5] netfilter: xt_connlimit: don't store address in the conn nodes

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Message-Id: <20190102204204.12389-2-mfo@canonical.com>
Date:   Wed,  2 Jan 2019 18:42:00 -0200
From:   Mauricio Faria de Oliveira <mfo@...onical.com>
To:     stable@...r.kernel.org, netdev@...r.kernel.org,
        Florian Westphal <fw@...len.de>
Cc:     Alakesh Haloi <alakeshh@...zon.com>,
        nivedita.singhvi@...onical.com,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        "David S. Miller" <davem@...emloft.net>,
        Yi-Hung Wei <yihung.wei@...il.com>
Subject: [PATCH v2 4.14 1/5] netfilter: xt_connlimit: don't store address in the conn nodes

From: Florian Westphal <fw@...len.de>

commit ce49480dba8666cba0106e8e31a942c9ce4c438a upstream.

Only stored, never read.  This is a leftover from commit 7d08487777c8
("netfilter: connlimit: use rbtree for per-host conntrack obj storage"),
which added the rbtree node struct that stores the address instead.

Signed-off-by: Florian Westphal <fw@...len.de>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>

[mfo: backport: refresh context lines and use older symbol/file names:
 - nf_conncount.c -> xt_connlimit.c.
   - nf_conncount_rb -> xt_connlimit_rb
   - nf_conncount_tuple -> xt_connlimit_conn
  - additionally, remove the add_hlist() 'addr' parameter that isn't used and removed
    later upstream with commit 625c556118f3 ("netfilter: connlimit: split xt_connlimit
    into front and backend") in the rename from 'xt_connlimit.c' to 'nf_conncount.c',
    a big refactor, so do it here, while still here in this related patch.]
Signed-off-by: Mauricio Faria de Oliveira <mfo@...onical.com>
---
 net/netfilter/xt_connlimit.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c
index ffa8eec..79d4151 100644
--- a/net/netfilter/xt_connlimit.c
+++ b/net/netfilter/xt_connlimit.c
@@ -46,7 +46,6 @@
 struct xt_connlimit_conn {
 	struct hlist_node		node;
 	struct nf_conntrack_tuple	tuple;
-	union nf_inet_addr		addr;
 };
 
 struct xt_connlimit_rb {
@@ -116,8 +115,7 @@ same_source_net(const union nf_inet_addr *addr,
 }
 
 static bool add_hlist(struct hlist_head *head,
-		      const struct nf_conntrack_tuple *tuple,
-		      const union nf_inet_addr *addr)
+		      const struct nf_conntrack_tuple *tuple)
 {
 	struct xt_connlimit_conn *conn;
 
@@ -125,7 +123,6 @@ static bool add_hlist(struct hlist_head *head,
 	if (conn == NULL)
 		return false;
 	conn->tuple = *tuple;
-	conn->addr = *addr;
 	hlist_add_head(&conn->node, head);
 	return true;
 }
@@ -231,7 +228,7 @@ count_tree(struct net *net, struct rb_root *root,
 			if (!addit)
 				return count;
 
-			if (!add_hlist(&rbconn->hhead, tuple, addr))
+			if (!add_hlist(&rbconn->hhead, tuple))
 				return 0; /* hotdrop */
 
 			return count + 1;
@@ -270,7 +267,6 @@ count_tree(struct net *net, struct rb_root *root,
 	}
 
 	conn->tuple = *tuple;
-	conn->addr = *addr;
 	rbconn->addr = *addr;
 
 	INIT_HLIST_HEAD(&rbconn->hhead);
-- 
2.7.4