openvswitch: Honor dp_ifindex, when specified, for vport lookup by name.

When OVS_VPORT_ATTR_NAME is specified and dp_ifindex is nonzero, the
logical behavior would be for the vport name lookup scope to be limited
to the specified datapath, but in fact the dp_ifindex value was ignored.
This commit causes the search scope to be honored.

Signed-off-by: Ben Pfaff <blp@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index ce64c18b8c79..2c030505b335 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1521,6 +1521,9 @@ static struct vport *lookup_vport(struct ovs_header *ovs_header,
                 vport = ovs_vport_locate(nla_data(a[OVS_VPORT_ATTR_NAME]));
                 if (!vport)
                         return ERR_PTR(-ENODEV);
+                if (ovs_header->dp_ifindex &&
+                    ovs_header->dp_ifindex != get_dpifindex(vport->dp))
+                        return ERR_PTR(-ENODEV);
                 return vport;
         } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
                 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);