RDMA/ipoib: Use parent rdma device net namespace

Use the net namespace of the underlying rdma device.
After honoring the rdma device's namespace, the ipoib
netdev now also runs in the same net namespace of the
rdma device.

Add an API to read the net namespace of the rdma device
so that ULP such as IPoIB can use it to initialize its
netdev.

Signed-off-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index f2f5465f2a90081cd1223408ea5c236cda0d39ad..7acafc5c0e09a853920f7359387aabd76bd38eff 100644 (file)
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -2577,6 +2577,8 @@ static struct net_device *ipoib_add_port(const char *format,
 
        ndev->rtnl_link_ops = ipoib_get_link_ops();
 
+       dev_net_set(ndev, rdma_dev_net(hca));
+
        result = register_netdev(ndev);
        if (result) {
                pr_warn("%s: couldn't register ipoib port %d; error %d\n",

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index b91a812348320a7e220098323a6181ef137847ef..7da27f01eeb6f32f721a0475737b94dc2ef67b74 100644 (file)
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -4871,6 +4871,11 @@ static inline int ibdev_to_node(struct ib_device *ibdev)
 bool rdma_dev_access_netns(const struct ib_device *device,
                           const struct net *net);
 
+static inline struct net *rdma_dev_net(struct ib_device *device)
+{
+       return read_pnet(&device->coredev.rdma_net);
+}
+
 #define IB_ROCE_UDP_ENCAP_VALID_PORT_MIN (0xC000)
 #define IB_ROCE_UDP_ENCAP_VALID_PORT_MAX (0xFFFF)
 #define IB_GRH_FLOWLABEL_MASK (0x000FFFFF)