From a3d9811fe230680c707accc5896a3c599ae4bacf Mon Sep 17 00:00:00 2001
From: =?utf8?q?M=C3=A1t=C3=A9=20Eckl?= <ecklm94@gmail.com>
Date: Fri, 3 Aug 2018 13:36:13 +0200
Subject: [PATCH] netfilter: bridge: Expose nf_tables bridge hook priorities
 through uapi
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Netfilter exposes standard hook priorities in case of ipv4, ipv6 and
arp but not in case of bridge.

This patch exposes the hook priority values of the bridge family (which are
different from the formerly mentioned) via uapi so that they can be used by
user-space applications just like the others.

Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/linux/netfilter_bridge.h      | 11 -----------
 include/uapi/linux/netfilter_bridge.h | 11 +++++++++++
 net/bridge/br_netfilter_hooks.c       |  1 +
 net/bridge/netfilter/ebtable_filter.c |  1 +
 net/bridge/netfilter/ebtable_nat.c    |  1 +
 5 files changed, 14 insertions(+), 11 deletions(-)

diff --git a/include/linux/netfilter_bridge.h b/include/linux/netfilter_bridge.h
index b671fdfd212b4..fa06865009702 100644
--- a/include/linux/netfilter_bridge.h
+++ b/include/linux/netfilter_bridge.h
@@ -5,17 +5,6 @@
 #include <uapi/linux/netfilter_bridge.h>
 #include <linux/skbuff.h>
 
-enum nf_br_hook_priorities {
-	NF_BR_PRI_FIRST = INT_MIN,
-	NF_BR_PRI_NAT_DST_BRIDGED = -300,
-	NF_BR_PRI_FILTER_BRIDGED = -200,
-	NF_BR_PRI_BRNF = 0,
-	NF_BR_PRI_NAT_DST_OTHER = 100,
-	NF_BR_PRI_FILTER_OTHER = 200,
-	NF_BR_PRI_NAT_SRC = 300,
-	NF_BR_PRI_LAST = INT_MAX,
-};
-
 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 
 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
diff --git a/include/uapi/linux/netfilter_bridge.h b/include/uapi/linux/netfilter_bridge.h
index 12fb77633f83c..156ccd089df18 100644
--- a/include/uapi/linux/netfilter_bridge.h
+++ b/include/uapi/linux/netfilter_bridge.h
@@ -26,4 +26,15 @@
 #define NF_BR_BROUTING		5
 #define NF_BR_NUMHOOKS		6
 
+enum nf_br_hook_priorities {
+	NF_BR_PRI_FIRST = INT_MIN,
+	NF_BR_PRI_NAT_DST_BRIDGED = -300,
+	NF_BR_PRI_FILTER_BRIDGED = -200,
+	NF_BR_PRI_BRNF = 0,
+	NF_BR_PRI_NAT_DST_OTHER = 100,
+	NF_BR_PRI_FILTER_OTHER = 200,
+	NF_BR_PRI_NAT_SRC = 300,
+	NF_BR_PRI_LAST = INT_MAX,
+};
+
 #endif /* _UAPI__LINUX_BRIDGE_NETFILTER_H */
diff --git a/net/bridge/br_netfilter_hooks.c b/net/bridge/br_netfilter_hooks.c
index 9b16eaf338196..6e0dc6bcd32af 100644
--- a/net/bridge/br_netfilter_hooks.c
+++ b/net/bridge/br_netfilter_hooks.c
@@ -26,6 +26,7 @@
 #include <linux/if_pppox.h>
 #include <linux/ppp_defs.h>
 #include <linux/netfilter_bridge.h>
+#include <uapi/linux/netfilter_bridge.h>
 #include <linux/netfilter_ipv4.h>
 #include <linux/netfilter_ipv6.h>
 #include <linux/netfilter_arp.h>
diff --git a/net/bridge/netfilter/ebtable_filter.c b/net/bridge/netfilter/ebtable_filter.c
index c41da5fac84f4..550324c516ee3 100644
--- a/net/bridge/netfilter/ebtable_filter.c
+++ b/net/bridge/netfilter/ebtable_filter.c
@@ -9,6 +9,7 @@
  */
 
 #include <linux/netfilter_bridge/ebtables.h>
+#include <uapi/linux/netfilter_bridge.h>
 #include <linux/module.h>
 
 #define FILTER_VALID_HOOKS ((1 << NF_BR_LOCAL_IN) | (1 << NF_BR_FORWARD) | \
diff --git a/net/bridge/netfilter/ebtable_nat.c b/net/bridge/netfilter/ebtable_nat.c
index 08df7406ecb38..c0fb3ca518af8 100644
--- a/net/bridge/netfilter/ebtable_nat.c
+++ b/net/bridge/netfilter/ebtable_nat.c
@@ -9,6 +9,7 @@
  */
 
 #include <linux/netfilter_bridge/ebtables.h>
+#include <uapi/linux/netfilter_bridge.h>
 #include <linux/module.h>
 
 #define NAT_VALID_HOOKS ((1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_LOCAL_OUT) | \
-- 
2.39.5