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authorJiri Pirko <jiri@mellanox.com>2016-07-04 08:23:12 +0200
committerDavid S. Miller <davem@davemloft.net>2016-07-04 18:25:15 -0700
commit7ce856aaaf13a5dc969ac5f998e5daaf1abe4cd2 (patch)
tree0f35230adc52699ef4949d4515e6ffc01422f916 /net
parent61c503f976b5449e6d7d31f74adbc29d6ce06125 (diff)
downloadlinux-7ce856aaaf13a5dc969ac5f998e5daaf1abe4cd2.tar.bz2
mlxsw: spectrum: Add couple of lower device helper functions
Add functions that iterate over lower devices and find port device. As a dependency add netdev_for_each_all_lower_dev and netdev_for_each_all_lower_dev_rcu macro with netdev_all_lower_get_next and netdev_all_lower_get_next_rcu shelpers. Also, add functions to return mlxsw struct according to lower device found and mlxsw_port struct with a reference to lower device. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index aba10d2a8bc3..a4f3b0a9aeaf 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5445,6 +5445,52 @@ void *netdev_lower_get_next(struct net_device *dev, struct list_head **iter)
EXPORT_SYMBOL(netdev_lower_get_next);
/**
+ * netdev_all_lower_get_next - Get the next device from all lower neighbour list
+ * @dev: device
+ * @iter: list_head ** of the current position
+ *
+ * Gets the next netdev_adjacent from the dev's all lower neighbour
+ * list, starting from iter position. The caller must hold RTNL lock or
+ * its own locking that guarantees that the neighbour all lower
+ * list will remain unchanged.
+ */
+struct net_device *netdev_all_lower_get_next(struct net_device *dev, struct list_head **iter)
+{
+ struct netdev_adjacent *lower;
+
+ lower = list_entry(*iter, struct netdev_adjacent, list);
+
+ if (&lower->list == &dev->all_adj_list.lower)
+ return NULL;
+
+ *iter = lower->list.next;
+
+ return lower->dev;
+}
+EXPORT_SYMBOL(netdev_all_lower_get_next);
+
+/**
+ * netdev_all_lower_get_next_rcu - Get the next device from all
+ * lower neighbour list, RCU variant
+ * @dev: device
+ * @iter: list_head ** of the current position
+ *
+ * Gets the next netdev_adjacent from the dev's all lower neighbour
+ * list, starting from iter position. The caller must hold RCU read lock.
+ */
+struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
+ struct list_head **iter)
+{
+ struct netdev_adjacent *lower;
+
+ lower = list_first_or_null_rcu(&dev->all_adj_list.lower,
+ struct netdev_adjacent, list);
+
+ return lower ? lower->dev : NULL;
+}
+EXPORT_SYMBOL(netdev_all_lower_get_next_rcu);
+
+/**
* netdev_lower_get_first_private_rcu - Get the first ->private from the
* lower neighbour list, RCU
* variant