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authorRoopa Prabhu <roopa@cumulusnetworks.com>2017-01-31 22:59:55 -0800
committerDavid S. Miller <davem@davemloft.net>2017-02-03 15:21:22 -0500
commit11538d039ac6efcf4f1a6c536e1b87cd3668a9fd (patch)
tree48288a17219c037942267db3c6c469cf47bf7ecb
parentefa5356b0d9753b9d7e63e41459eba106cce30f3 (diff)
bridge: vlan dst_metadata hooks in ingress and egress paths
- ingress hook: - if port is a tunnel port, use tunnel info in attached dst_metadata to map it to a local vlan - egress hook: - if port is a tunnel port, use tunnel info attached to vlan to set dst_metadata on the skb CC: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/bridge/br_forward.c2
-rw-r--r--net/bridge/br_input.c8
-rw-r--r--net/bridge/br_private.h2
-rw-r--r--net/bridge/br_private_tunnel.h11
-rw-r--r--net/bridge/br_vlan.c7
-rw-r--r--net/bridge/br_vlan_tunnel.c54
6 files changed, 82 insertions, 2 deletions
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 5a1f8ef49899..6bfac29318f2 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -80,7 +80,7 @@ static void __br_forward(const struct net_bridge_port *to,
int br_hook;
vg = nbp_vlan_group_rcu(to);
- skb = br_handle_vlan(to->br, vg, skb);
+ skb = br_handle_vlan(to->br, to, vg, skb);
if (!skb)
return;
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 855b72fbe1da..fba38d8a1a08 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -21,6 +21,7 @@
#include <linux/export.h>
#include <linux/rculist.h>
#include "br_private.h"
+#include "br_private_tunnel.h"
/* Hook for brouter */
br_should_route_hook_t __rcu *br_should_route_hook __read_mostly;
@@ -57,7 +58,7 @@ static int br_pass_frame_up(struct sk_buff *skb)
indev = skb->dev;
skb->dev = brdev;
- skb = br_handle_vlan(br, vg, skb);
+ skb = br_handle_vlan(br, NULL, vg, skb);
if (!skb)
return NET_RX_DROP;
/* update the multicast stats if the packet is IGMP/MLD */
@@ -261,6 +262,11 @@ rx_handler_result_t br_handle_frame(struct sk_buff **pskb)
return RX_HANDLER_CONSUMED;
p = br_port_get_rcu(skb->dev);
+ if (p->flags & BR_VLAN_TUNNEL) {
+ if (br_handle_ingress_vlan_tunnel(skb, p,
+ nbp_vlan_group_rcu(p)))
+ goto drop;
+ }
if (unlikely(is_link_local_ether_addr(dest))) {
u16 fwd_mask = p->br->group_fwd_mask_required;
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 61de90f28afa..40177df45ba6 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -775,6 +775,7 @@ bool br_allowed_egress(struct net_bridge_vlan_group *vg,
const struct sk_buff *skb);
bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
struct sk_buff *br_handle_vlan(struct net_bridge *br,
+ const struct net_bridge_port *port,
struct net_bridge_vlan_group *vg,
struct sk_buff *skb);
int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
@@ -874,6 +875,7 @@ static inline bool br_should_learn(struct net_bridge_port *p,
}
static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
+ const struct net_bridge_port *port,
struct net_bridge_vlan_group *vg,
struct sk_buff *skb)
{
diff --git a/net/bridge/br_private_tunnel.h b/net/bridge/br_private_tunnel.h
index 1c8d0d5302cb..4a447a378ab3 100644
--- a/net/bridge/br_private_tunnel.h
+++ b/net/bridge/br_private_tunnel.h
@@ -40,6 +40,11 @@ int nbp_vlan_tunnel_info_add(struct net_bridge_port *port, u16 vid, u32 tun_id);
void nbp_vlan_tunnel_info_flush(struct net_bridge_port *port);
void vlan_tunnel_info_del(struct net_bridge_vlan_group *vg,
struct net_bridge_vlan *vlan);
+int br_handle_ingress_vlan_tunnel(struct sk_buff *skb,
+ struct net_bridge_port *p,
+ struct net_bridge_vlan_group *vg);
+int br_handle_egress_vlan_tunnel(struct sk_buff *skb,
+ struct net_bridge_vlan *vlan);
#else
static inline int vlan_tunnel_init(struct net_bridge_vlan_group *vg)
{
@@ -67,6 +72,12 @@ static inline void vlan_tunnel_info_del(struct net_bridge_vlan_group *vg,
{
}
+static inline int br_handle_ingress_vlan_tunnel(struct sk_buff *skb,
+ struct net_bridge_port *p,
+ struct net_bridge_vlan_group *vg)
+{
+ return 0;
+}
#endif
#endif
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 64002e3941ca..62e68c0dc687 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -341,6 +341,7 @@ static void __vlan_flush(struct net_bridge_vlan_group *vg)
}
struct sk_buff *br_handle_vlan(struct net_bridge *br,
+ const struct net_bridge_port *p,
struct net_bridge_vlan_group *vg,
struct sk_buff *skb)
{
@@ -381,6 +382,12 @@ struct sk_buff *br_handle_vlan(struct net_bridge *br,
if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
skb->vlan_tci = 0;
+
+ if (p && (p->flags & BR_VLAN_TUNNEL) &&
+ br_handle_egress_vlan_tunnel(skb, v)) {
+ kfree_skb(skb);
+ return NULL;
+ }
out:
return skb;
}
diff --git a/net/bridge/br_vlan_tunnel.c b/net/bridge/br_vlan_tunnel.c
index b3fd29d20a3c..b2b79a070162 100644
--- a/net/bridge/br_vlan_tunnel.c
+++ b/net/bridge/br_vlan_tunnel.c
@@ -39,6 +39,13 @@ static const struct rhashtable_params br_vlan_tunnel_rht_params = {
.automatic_shrinking = true,
};
+static struct net_bridge_vlan *br_vlan_tunnel_lookup(struct rhashtable *tbl,
+ u64 tunnel_id)
+{
+ return rhashtable_lookup_fast(tbl, &tunnel_id,
+ br_vlan_tunnel_rht_params);
+}
+
void vlan_tunnel_info_del(struct net_bridge_vlan_group *vg,
struct net_bridge_vlan *vlan)
{
@@ -147,3 +154,50 @@ void vlan_tunnel_deinit(struct net_bridge_vlan_group *vg)
{
rhashtable_destroy(&vg->tunnel_hash);
}
+
+int br_handle_ingress_vlan_tunnel(struct sk_buff *skb,
+ struct net_bridge_port *p,
+ struct net_bridge_vlan_group *vg)
+{
+ struct ip_tunnel_info *tinfo = skb_tunnel_info(skb);
+ struct net_bridge_vlan *vlan;
+
+ if (!vg || !tinfo)
+ return 0;
+
+ /* if already tagged, ignore */
+ if (skb_vlan_tagged(skb))
+ return 0;
+
+ /* lookup vid, given tunnel id */
+ vlan = br_vlan_tunnel_lookup(&vg->tunnel_hash, tinfo->key.tun_id);
+ if (!vlan)
+ return 0;
+
+ skb_dst_drop(skb);
+
+ __vlan_hwaccel_put_tag(skb, p->br->vlan_proto, vlan->vid);
+
+ return 0;
+}
+
+int br_handle_egress_vlan_tunnel(struct sk_buff *skb,
+ struct net_bridge_vlan *vlan)
+{
+ int err;
+
+ if (!vlan || !vlan->tinfo.tunnel_id)
+ return 0;
+
+ if (unlikely(!skb_vlan_tag_present(skb)))
+ return 0;
+
+ skb_dst_drop(skb);
+ err = skb_vlan_pop(skb);
+ if (err)
+ return err;
+
+ skb_dst_set(skb, dst_clone(&vlan->tinfo.tunnel_dst->dst));
+
+ return 0;
+}