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[v3,net-next,18/27] net: add a possibility to get private from netdev_adjacent->list

Message ID 1379378812-18346-19-git-send-email-vfalico@redhat.com
State RFC, archived
Delegated to: David Miller
Headers show

Commit Message

Veaceslav Falico Sept. 17, 2013, 12:46 a.m. UTC 
It will be useful to get first/last element.

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>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
---

Notes:
    v2  -> v3:
    No change.
    
    v1  -> v2:
    No changes.
    
    RFC -> v1:
    No changes.

 include/linux/netdevice.h |  1 +
 net/core/dev.c            | 10 ++++++++++
 2 files changed, 11 insertions(+)
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Patch

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 48431f0..72d1631 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2850,6 +2850,7 @@  extern void *netdev_lower_get_next_private_rcu(struct net_device *dev,
 	     priv; \
 	     priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
 
+extern void *netdev_adjacent_get_private(struct list_head *adj_list);
 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,
diff --git a/net/core/dev.c b/net/core/dev.c
index 11284c8..24c7d17 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4512,6 +4512,16 @@  struct net_device *netdev_master_upper_dev_get(struct net_device *dev)
 }
 EXPORT_SYMBOL(netdev_master_upper_dev_get);
 
+void *netdev_adjacent_get_private(struct list_head *adj_list)
+{
+	struct netdev_adjacent *adj;
+
+	adj = list_entry(adj_list, struct netdev_adjacent, list);
+
+	return adj->private;
+}
+EXPORT_SYMBOL(netdev_adjacent_get_private);
+
 /* netdev_all_upper_get_next_dev_rcu - Get the next dev from upper list
  * @dev: device
  * @iter: list_head ** of the current position