From: Eric Dumazet Add modern __rcu annotations to bridge code, to reduce sparse errors, and self document code. (CONFIG_SPARSE_RCU_POINTER=y) br_port_get() split int br_port_get_rtnl() and br_port_get_rcu() to make clear RTNL is held. Signed-off-by: Eric Dumazet Signed-off-by: Stephen Hemminger --- net/bridge/br_if.c | 2 +- net/bridge/br_netlink.c | 4 ++-- net/bridge/br_notify.c | 4 ++-- net/bridge/br_private.h | 9 +++++---- 4 files changed, 10 insertions(+), 9 deletions(-) --- a/net/bridge/br_netlink.c 2010-11-14 12:24:35.000000000 -0800 +++ b/net/bridge/br_netlink.c 2010-11-14 12:26:47.859892139 -0800 @@ -119,7 +119,7 @@ static int br_dump_ifinfo(struct sk_buff idx = 0; for_each_netdev(net, dev) { - struct net_bridge_port *port = br_port_get(dev); + struct net_bridge_port *port = br_port_get_rtnl(dev); /* not a bridge port */ if (!port || idx < cb->args[0]) @@ -171,7 +171,7 @@ static int br_rtm_setlink(struct sk_buff if (!dev) return -ENODEV; - p = br_port_get(dev); + p = br_port_get_rtnl(dev); if (!p) return -EINVAL; --- a/net/bridge/br_private.h 2010-11-14 12:25:44.600853008 -0800 +++ b/net/bridge/br_private.h 2010-11-14 12:33:23.880986098 -0800 @@ -159,9 +159,10 @@ static inline struct net_bridge_port *br rcu_dereference(dev->rx_handler_data) : NULL; } -static inline struct net_bridge_port *br_port_get(struct net_device *dev) +static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev) { - return br_port_exists(dev) ? dev->rx_handler_data : NULL; + return br_port_exists(dev) ? + rtnl_dereference(dev->rx_handler_data) : NULL; } #define br_port_get(dev) ((struct net_bridge_port *) dev->rx_handler_data) --- a/net/bridge/br_if.c 2010-11-14 12:23:34.000000000 -0800 +++ b/net/bridge/br_if.c 2010-11-14 12:27:24.267934764 -0800 @@ -475,7 +475,7 @@ int br_del_if(struct net_bridge *br, str { struct net_bridge_port *p; - p = br_port_get(dev); + p = br_port_get_rtnl(dev); if (!p || p->br != br) return -EINVAL; --- a/net/bridge/br_notify.c 2010-11-14 12:30:46.250267273 -0800 +++ b/net/bridge/br_notify.c 2010-11-14 12:31:11.749076964 -0800 @@ -37,10 +37,10 @@ static int br_device_event(struct notifi int err; /* not a port of a bridge */ - if (!br_port_exists(dev)) + p = br_port_get_rtnl(dev); + if (!p) return NOTIFY_DONE; - p = br_port_get(dev); br = p->br; switch (event) { -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html