@@ -4380,6 +4380,33 @@ struct netdev_adjacent {
struct rcu_head rcu;
};
+static struct netdev_adjacent *__netdev_find_adj_rcu(struct net_device *dev,
+ struct net_device *adj_dev,
+ bool upper, bool neighbour)
+{
+ struct netdev_adjacent *adj;
+ struct list_head *adj_list;
+
+ if (neighbour)
+ adj_list = upper ? &dev->adj_list.upper :
+ &dev->adj_list.lower;
+ else
+ adj_list = upper ? &dev->all_adj_list.upper :
+ &dev->all_adj_list.lower;
+
+ list_for_each_entry_rcu(adj, adj_list, list) {
+ if (adj->dev == adj_dev)
+ return adj;
+ }
+ return NULL;
+}
+
+static struct netdev_adjacent *__netdev_lower_find_rcu(struct net_device *dev,
+ struct net_device *ldev)
+{
+ return __netdev_find_adj_rcu(dev, ldev, false, true);
+}
+
static struct netdev_adjacent *__netdev_find_adj(struct net_device *dev,
struct net_device *adj_dev,
bool upper, bool neighbour)
Currently we have only the RTNL flavour, however we can traverse it while holding only RCU, so add the RCU search. Add only one function that will be used further, other functions can be added easily afterwards, if anyone would need them. CC: "David S. Miller" <davem@davemloft.net> CC: Eric Dumazet <edumazet@google.com> CC: Jiri Pirko <jiri@resnulli.us> CC: Alexander Duyck <alexander.h.duyck@intel.com> CC: Cong Wang <amwang@redhat.com> Signed-off-by: Veaceslav Falico <vfalico@redhat.com> --- net/core/dev.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)