@@ -2768,6 +2768,16 @@ extern int bpf_jit_enable;
extern bool netdev_has_upper_dev(struct net_device *dev,
struct net_device *upper_dev);
extern bool netdev_has_any_upper_dev(struct net_device *dev);
+extern struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
+ struct list_head **iter);
+
+/* iterate through upper list, must be called under RCU read lock */
+#define netdev_for_each_upper_dev_rcu(dev, upper, iter) \
+ for (iter = &(dev)->upper_dev_list, \
+ upper = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
+ upper; \
+ upper = netdev_upper_get_next_dev_rcu(dev, &(iter)))
+
extern struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
extern struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
extern int netdev_upper_dev_link(struct net_device *dev,
The new macro netdev_for_each_upper_dev_rcu(dev, upper, iter) iterates through the dev->upper_dev_list starting from the first element, using the netdev_upper_get_next_dev_rcu(dev, &iter). Must be called under RCU read lock. 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> --- Notes: v1: new patch v2: rename netdev_for_each_upper_dev{,_rcu} and use/export the renamed netdev_upper_get_next_dev_rcu(). v3: no change v4: no change include/linux/netdevice.h | 10 ++++++++++ 1 file changed, 10 insertions(+)