[PATCH net-next 1/2] net: l3mdev: Add master device lookup by index
From: David Ahern <hidden>
Date: 2015-12-16 21:20:53
Subsystem:
l3mdev, networking [general], the rest · Maintainers:
David Ahern, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Add helper to lookup l3mdev master index given a device index. Signed-off-by: David Ahern <redacted> --- include/net/l3mdev.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)
diff --git a/include/net/l3mdev.h b/include/net/l3mdev.h
index 774d85b2d5d9..786226f8e77b 100644
--- a/include/net/l3mdev.h
+++ b/include/net/l3mdev.h@@ -51,6 +51,24 @@ static inline int l3mdev_master_ifindex(struct net_device *dev) return ifindex; } +static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex) +{ + struct net_device *dev; + int rc = 0; + + if (likely(ifindex)) { + rcu_read_lock(); + + dev = dev_get_by_index_rcu(net, ifindex); + if (dev) + rc = l3mdev_master_ifindex_rcu(dev); + + rcu_read_unlock(); + } + + return rc; +} + /* get index of an interface to use for FIB lookups. For devices * enslaved to an L3 master device FIB lookups are based on the * master index
@@ -167,6 +185,11 @@ static inline int l3mdev_master_ifindex(struct net_device *dev) return 0; } +static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex) +{ + return 0; +} + static inline int l3mdev_fib_oif_rcu(struct net_device *dev) { return dev ? dev->ifindex : 0;
--
1.9.1