[PATCH net-next v2 5/10] net: add and export netdev_adjacent_get_private_rcu()
From: Ding Tianhong <hidden>
Date: 2013-11-08 02:29:10
Subsystem:
networking drivers, networking [general], the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
In bonding, the bond lock could not protect slave list any more, the bond lock will be replace with RTNL or RCU, sometimes bonding needs netdev_adjacent_get_private_rcu() to get a slave in RCU protect, so add a new function and export it. Suggested-by: Jay Vosburgh <redacted> Suggested-by: Veaceslav Falico <redacted> Signed-off-by: Ding Tianhong <redacted> --- include/linux/netdevice.h | 1 + net/core/dev.c | 10 ++++++++++ 2 files changed, 11 insertions(+)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index e6353ca..c27bb4a 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h@@ -2840,6 +2840,7 @@ void *netdev_lower_get_next_private_rcu(struct net_device *dev, priv = netdev_lower_get_next_private_rcu(dev, &(iter))) void *netdev_adjacent_get_private(struct list_head *adj_list); +void *netdev_adjacent_get_private_rcu(struct list_head *adj_list); struct net_device *netdev_master_upper_dev_get(struct net_device *dev); struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev);
diff --git a/net/core/dev.c b/net/core/dev.c
index 0e61365..92613a2 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c@@ -4478,6 +4478,16 @@ void *netdev_adjacent_get_private(struct list_head *adj_list) } EXPORT_SYMBOL(netdev_adjacent_get_private); +void *netdev_adjacent_get_private_rcu(struct list_head *adj_list) +{ + struct netdev_adjacent *adj; + + adj = list_entry_rcu(adj_list, struct netdev_adjacent, list); + + return adj->private; +} +EXPORT_SYMBOL(netdev_adjacent_get_private_rcu); + /** * netdev_all_upper_get_next_dev_rcu - Get the next dev from upper list * @dev: device
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1.8.2.1