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Commit 8b5be856 authored by Veaceslav Falico's avatar Veaceslav Falico Committed by David S. Miller
Browse files

net: add netdev_for_each_upper_dev_rcu() 



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: default avatarVeaceslav Falico <vfalico@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 48311f46

include/linux/netdevice.h

+10 −0
Original line number Diff line number Diff line
@@ -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,