Add support for Infiniband interfaces

This patch adds support for Infiniband interfaces. The only difference
between Inifiniband and regular interfaces at this time is that an
interface with type "ib_interface" will have "TYPE=Infiniband" added
to the ifcfg file.

However, the Infiniband interface is implemented as a full new class,
so in the future we can add script functions or additional config
options to the Infiniband interface config if needed.

Unit tests for both the object and the ifcfg implementation are
included. This patch does not include an implementation for systems
that use /etc/network/interfaces (Debian-based systems).

Note that this change has not yet been tested on bare metal with
Infiniband hardware.

Fixes bug: https://bugzilla.redhat.com/show_bug.cgi?id=1326616

Change-Id: Iaeaca9cd71e2cea6147951d49aecc7458be4ca0b

1 files changed, 46 insertions, 0 deletions

diff --git a/os_net_config/impl_ifcfg.py b/os_net_config/impl_ifcfg.py
index fbd1c3a..22aef22 100644
--- a/os_net_config/impl_ifcfg.py
+++ b/os_net_config/impl_ifcfg.py
@@ -64,6 +64,7 @@ class IfcfgNetConfig(os_net_config.NetConfig):
         self.bridge_data = {}
         self.linuxbridge_data = {}
         self.linuxbond_data = {}
+        self.ib_interface_data = {}
         self.member_names = {}
         self.renamed_interfaces = {}
         self.bond_primary_ifaces = {}
@@ -101,6 +102,8 @@ class IfcfgNetConfig(os_net_config.NetConfig):
                         data += "PHYSDEV=%s\n" % base_opt.linux_bond_name
         elif isinstance(base_opt, objects.IvsInterface):
             data += "TYPE=IVSIntPort\n"
+        elif isinstance(base_opt, objects.IbInterface):
+            data += "TYPE=Infiniband\n"
         elif re.match('\w+\.\d+$', base_opt.name):
             data += "VLAN=yes\n"
         if base_opt.linux_bond_name:
@@ -391,6 +394,23 @@ class IfcfgNetConfig(os_net_config.NetConfig):
         logger.debug('ovs patch port data: %s' % data)
         self.interface_data[ovs_patch_port.name] = data
 
+    def add_ib_interface(self, ib_interface):
+        """Add an InfiniBand interface object to the net config object.
+
+        :param ib_interface: The InfiniBand interface object to add.
+        """
+        logger.info('adding ib_interface: %s' % ib_interface.name)
+        data = self._add_common(ib_interface)
+        logger.debug('ib_interface data: %s' % data)
+        self.ib_interface_data[ib_interface.name] = data
+        if ib_interface.routes:
+            self._add_routes(ib_interface.name, ib_interface.routes)
+
+        if ib_interface.renamed:
+            logger.info("InfiniBand interface %s being renamed to %s"
+                        % (ib_interface.hwname, ib_interface.name))
+            self.renamed_interfaces[ib_interface.hwname] = ib_interface.name
+
     def generate_ivs_config(self, ivs_uplinks, ivs_interfaces):
         """Generate configuration content for ivs."""
 
@@ -562,6 +582,32 @@ class IfcfgNetConfig(os_net_config.NetConfig):
                 logger.info('No changes required for linux bond: %s' %
                             bond_name)
 
+        # Infiniband interfaces are handled similarly to Ethernet interfaces
+        for interface_name, iface_data in self.ib_interface_data.iteritems():
+            route_data = self.route_data.get(interface_name, '')
+            route6_data = self.route6_data.get(interface_name, '')
+            interface_path = self.root_dir + ifcfg_config_path(interface_name)
+            route_path = self.root_dir + route_config_path(interface_name)
+            route6_path = self.root_dir + route6_config_path(interface_name)
+            all_file_names.append(interface_path)
+            all_file_names.append(route_path)
+            all_file_names.append(route6_path)
+            # TODO(dsneddon) determine if InfiniBand can be used with IVS
+            if "IVS_BRIDGE" in iface_data:
+                ivs_uplinks.append(interface_name)
+            all_file_names.append(route6_path)
+            if (utils.diff(interface_path, iface_data) or
+                    utils.diff(route_path, route_data) or
+                    utils.diff(route6_path, route6_data)):
+                restart_interfaces.append(interface_name)
+                restart_interfaces.extend(self.child_members(interface_name))
+                update_files[interface_path] = iface_data
+                update_files[route_path] = route_data
+                update_files[route6_path] = route6_data
+            else:
+                logger.info('No changes required for InfiniBand iface: %s' %
+                            interface_name)
+
         if cleanup:
             for ifcfg_file in glob.iglob(cleanup_pattern()):
                 if ifcfg_file not in all_file_names: