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author | Jiri Pirko <jiri@mellanox.com> | 2016-07-04 08:23:12 +0200 |
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committer | David S. Miller <davem@davemloft.net> | 2016-07-04 18:25:15 -0700 |
commit | 7ce856aaaf13a5dc969ac5f998e5daaf1abe4cd2 (patch) | |
tree | 0f35230adc52699ef4949d4515e6ffc01422f916 /net/core/dev.c | |
parent | 61c503f976b5449e6d7d31f74adbc29d6ce06125 (diff) | |
download | op-kernel-dev-7ce856aaaf13a5dc969ac5f998e5daaf1abe4cd2.zip op-kernel-dev-7ce856aaaf13a5dc969ac5f998e5daaf1abe4cd2.tar.gz |
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/core/dev.c')
-rw-r--r-- | net/core/dev.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index aba10d2..a4f3b0a 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 |