Signed-off-by: Jiri Pirko <[email protected]>
---
include/linux/netdevice.h | 18 +++++++++++++-----
net/core/dev.c | 26 ++++++++++++++------------
2 files changed, 27 insertions(+), 17 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 14bd8b3..bee9673 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3076,15 +3076,23 @@ extern int weight_p;
extern int bpf_jit_enable;
bool netdev_has_upper_dev(struct net_device *dev, struct net_device
*upper_dev);
-struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
- struct list_head **iter);
+struct net_device *netdev_all_adj_get_next_dev_rcu(struct net_device *dev,
+ struct list_head **iter,
+ struct list_head *adj_list);
/* iterate through upper list, must be called under RCU read lock */
#define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
- for (iter = &(dev)->all_adj_list.upper, \
- updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
+ for (iter = NULL, \
+ updev = netdev_all_adj_get_next_dev_rcu(dev, &(iter),
&(dev)->all_adj_list.upper); \
updev; \
- updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
+ updev = netdev_all_adj_get_next_dev_rcu(dev, &(iter),
&(dev)->all_adj_list.upper))
+
+/* iterate through lower list, must be called under RCU read lock */
+#define netdev_for_each_all_lower_dev_rcu(dev, lodev, iter) \
+ for (iter = NULL, \
+ lodev = netdev_all_adj_get_next_dev_rcu(dev, &(iter),
&(dev)->all_adj_list.lower); \
+ lodev; \
+ lodev = netdev_all_adj_get_next_dev_rcu(dev, &(iter),
&(dev)->all_adj_list.lower))
void *netdev_lower_get_next_private(struct net_device *dev,
struct list_head **iter);
diff --git a/net/core/dev.c b/net/core/dev.c
index a0de81c..62bcec9 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4542,30 +4542,32 @@ void *netdev_adjacent_get_private(struct list_head
*adj_list)
EXPORT_SYMBOL(netdev_adjacent_get_private);
/**
- * netdev_all_upper_get_next_dev_rcu - Get the next dev from upper list
+ * netdev_all_adj_get_next_dev_rcu - Get the next dev from adjacent list
* @dev: device
* @iter: list_head ** of the current position
+ * @adj_list: adjacent list to go through
*
- * Gets the next device from the dev's upper list, starting from iter
+ * Gets the next device from the dev's adjacent list, starting from iter
* position. The caller must hold RCU read lock.
*/
-struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
- struct list_head **iter)
+struct net_device *netdev_all_adj_get_next_dev_rcu(struct net_device *dev,
+ struct list_head **iter,
+ struct list_head *adj_list)
{
- struct netdev_adjacent *upper;
+ struct netdev_adjacent *adj;
WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_rtnl_is_held());
- upper = list_entry_rcu((*iter)->next, struct netdev_adjacent, list);
-
- if (&upper->list == &dev->all_adj_list.upper)
+ if (!*iter)
+ *iter = adj_list;
+ if ((*iter)->next == adj_list)
return NULL;
- *iter = &upper->list;
-
- return upper->dev;
+ adj = list_entry_rcu((*iter)->next, struct netdev_adjacent, list);
+ *iter = &adj->list;
+ return adj->dev;
}
-EXPORT_SYMBOL(netdev_all_upper_get_next_dev_rcu);
+EXPORT_SYMBOL(netdev_all_adj_get_next_dev_rcu);
/**
* netdev_lower_get_next_private - Get the next ->private from the
--
1.9.0
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