bridge: support for ndo_fdb_get

This patch implements ndo_fdb_get for the bridge
fdb.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 9f41a5d..013323b 100644 (file)
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -403,6 +403,7 @@ static const struct net_device_ops br_netdev_ops = {
        .ndo_fdb_add             = br_fdb_add,
        .ndo_fdb_del             = br_fdb_delete,
        .ndo_fdb_dump            = br_fdb_dump,
+       .ndo_fdb_get             = br_fdb_get,
        .ndo_bridge_getlink      = br_getlink,
        .ndo_bridge_setlink      = br_setlink,
        .ndo_bridge_dellink      = br_dellink,

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index 38b1d0d..fe3c758 100644 (file)
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -773,6 +773,32 @@ skip:
        return err;
 }
 
+int br_fdb_get(struct sk_buff *skb,
+              struct nlattr *tb[],
+              struct net_device *dev,
+              const unsigned char *addr,
+              u16 vid, u32 portid, u32 seq,
+              struct netlink_ext_ack *extack)
+{
+       struct net_bridge *br = netdev_priv(dev);
+       struct net_bridge_fdb_entry *f;
+       int err = 0;
+
+       rcu_read_lock();
+       f = br_fdb_find_rcu(br, addr, vid);
+       if (!f) {
+               NL_SET_ERR_MSG(extack, "Fdb entry not found");
+               err = -ENOENT;
+               goto errout;
+       }
+
+       err = fdb_fill_info(skb, br, f, portid, seq,
+                           RTM_NEWNEIGH, 0);
+errout:
+       rcu_read_unlock();
+       return err;
+}
+
 /* Update (create or replace) forwarding database entry */
 static int fdb_add_entry(struct net_bridge *br, struct net_bridge_port *source,
                         const u8 *addr, u16 state, u16 flags, u16 vid,

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index ff3dfb2..d240b3e 100644 (file)
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -575,6 +575,9 @@ int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
               const unsigned char *addr, u16 vid, u16 nlh_flags);
 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
                struct net_device *dev, struct net_device *fdev, int *idx);
+int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
+              const unsigned char *addr, u16 vid, u32 portid, u32 seq,
+              struct netlink_ext_ack *extack);
 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,