1 files changed, 101 insertions, 0 deletions
diff --git a/src/migration-scripts/interfaces/20-to-21 b/src/migration-scripts/interfaces/20-to-21
new file mode 100755
index 000000000..9210330d6
--- /dev/null
+++ b/src/migration-scripts/interfaces/20-to-21
@@ -0,0 +1,101 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2021 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# T3619: mirror Linux Kernel defaults for ethernet offloading options into VyOS
+# CLI. See https://phabricator.vyos.net/T3619#102254 for all the details.
+
+from sys import argv
+
+from vyos.ethtool import Ethtool
+from vyos.configtree import ConfigTree
+
+if (len(argv) < 1):
+    print("Must specify file name!")
+    exit(1)
+
+file_name = argv[1]
+with open(file_name, 'r') as f:
+    config_file = f.read()
+
+base = ['interfaces', 'ethernet']
+config = ConfigTree(config_file)
+
+if not config.exists(base):
+    exit(0)
+
+for ifname in config.list_nodes(base):
+    eth = Ethtool(ifname)
+
+    # If GRO is enabled by the Kernel - we reflect this on the CLI. If GRO is
+    # enabled via CLI but not supported by the NIC - we remove it from the CLI
+    configured = config.exists(base + [ifname, 'offload', 'gro'])
+    enabled, fixed = eth.get_generic_receive_offload()
+    if configured and fixed:
+        config.delete(base + [ifname, 'offload', 'gro'])
+    elif enabled and not fixed:
+        config.set(base + [ifname, 'offload', 'gro'])
+
+    # If GSO is enabled by the Kernel - we reflect this on the CLI. If GSO is
+    # enabled via CLI but not supported by the NIC - we remove it from the CLI
+    configured = config.exists(base + [ifname, 'offload', 'gso'])
+    enabled, fixed = eth.get_generic_segmentation_offload()
+    if configured and fixed:
+        config.delete(base + [ifname, 'offload', 'gso'])
+    elif enabled and not fixed:
+        config.set(base + [ifname, 'offload', 'gso'])
+
+    # If LRO is enabled by the Kernel - we reflect this on the CLI. If LRO is
+    # enabled via CLI but not supported by the NIC - we remove it from the CLI
+    configured = config.exists(base + [ifname, 'offload', 'lro'])
+    enabled, fixed = eth.get_large_receive_offload()
+    if configured and fixed:
+        config.delete(base + [ifname, 'offload', 'lro'])
+    elif enabled and not fixed:
+        config.set(base + [ifname, 'offload', 'lro'])
+
+    # If SG is enabled by the Kernel - we reflect this on the CLI. If SG is
+    # enabled via CLI but not supported by the NIC - we remove it from the CLI
+    configured = config.exists(base + [ifname, 'offload', 'sg'])
+    enabled, fixed = eth.get_scatter_gather()
+    if configured and fixed:
+        config.delete(base + [ifname, 'offload', 'sg'])
+    elif enabled and not fixed:
+        config.set(base + [ifname, 'offload', 'sg'])
+
+    # If TSO is enabled by the Kernel - we reflect this on the CLI. If TSO is
+    # enabled via CLI but not supported by the NIC - we remove it from the CLI
+    configured = config.exists(base + [ifname, 'offload', 'tso'])
+    enabled, fixed = eth.get_tcp_segmentation_offload()
+    if configured and fixed:
+        config.delete(base + [ifname, 'offload', 'tso'])
+    elif enabled and not fixed:
+        config.set(base + [ifname, 'offload', 'tso'])
+
+    # If UFO is enabled by the Kernel - we reflect this on the CLI. If UFO is
+    # enabled via CLI but not supported by the NIC - we remove it from the CLI
+    configured = config.exists(base + [ifname, 'offload', 'ufo'])
+    enabled, fixed = eth.get_udp_fragmentation_offload()
+    if configured and fixed:
+        config.delete(base + [ifname, 'offload', 'ufo'])
+    elif enabled and not fixed:
+        config.set(base + [ifname, 'offload', 'ufo'])
+
+try:
+    with open(file_name, 'w') as f:
+        f.write(config.to_string())
+except OSError as e:
+    print("Failed to save the modified config: {}".format(e))
+    exit(1)