From 9602c01e57f7b868d748c2ba2aef0efa64b71ffc Mon Sep 17 00:00:00 2001 From: Andy Zhou Date: Fri, 10 Nov 2017 12:09:41 -0800 Subject: openvswitch: export get_dp() API. Later patches will invoke get_dp() outside of datapath.c. Export it. Signed-off-by: Andy Zhou Signed-off-by: David S. Miller --- net/openvswitch/datapath.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'net/openvswitch/datapath.h') diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h index 4a104ef9e12c..954c4ed465a5 100644 --- a/net/openvswitch/datapath.h +++ b/net/openvswitch/datapath.h @@ -30,6 +30,7 @@ #include "conntrack.h" #include "flow.h" #include "flow_table.h" +#include "vport-internal_dev.h" #define DP_MAX_PORTS USHRT_MAX #define DP_VPORT_HASH_BUCKETS 1024 @@ -190,6 +191,36 @@ static inline struct vport *ovs_vport_ovsl(const struct datapath *dp, int port_n return ovs_lookup_vport(dp, port_no); } +/* Must be called with rcu_read_lock. */ +static inline struct datapath *get_dp_rcu(struct net *net, int dp_ifindex) +{ + struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex); + + if (dev) { + struct vport *vport = ovs_internal_dev_get_vport(dev); + + if (vport) + return vport->dp; + } + + return NULL; +} + +/* The caller must hold either ovs_mutex or rcu_read_lock to keep the + * returned dp pointer valid. + */ +static inline struct datapath *get_dp(struct net *net, int dp_ifindex) +{ + struct datapath *dp; + + WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); + rcu_read_lock(); + dp = get_dp_rcu(net, dp_ifindex); + rcu_read_unlock(); + + return dp; +} + extern struct notifier_block ovs_dp_device_notifier; extern struct genl_family dp_vport_genl_family; -- cgit