ethernet: T5566: disable energy efficient ethernet (EEE) for interfaces

VyOS is a routing (packet pushing) platform, thus supporting EEE which
potentially causes issues is not a good idea. Some recent Intel drivers enable
EEE by default, thus we will disable this for every NIC supporting EEE.

(cherry picked from commit ab30509b25d54dac99294b76ba03fd49c3d2c946)

1 files changed, 31 insertions, 0 deletions

diff --git a/python/vyos/ifconfig/ethernet.py b/python/vyos/ifconfig/ethernet.py
index aa1e87744..aaf903acd 100644
--- a/python/vyos/ifconfig/ethernet.py
+++ b/python/vyos/ifconfig/ethernet.py
@@ -399,6 +399,34 @@ class EthernetIf(Interface):
             print(f'could not set "{rx_tx}" ring-buffer for {ifname}')
         return output
 
+    def set_eee(self, enable):
+        """
+        Enable/Disable Energy Efficient Ethernet (EEE) settings
+
+        Example:
+        >>> from vyos.ifconfig import EthernetIf
+        >>> i = EthernetIf('eth0')
+        >>> i.set_eee(enable=False)
+        """
+        if not isinstance(enable, bool):
+            raise ValueError('Value out of range')
+
+        if not self.ethtool.check_eee():
+            self._debug_msg(f'NIC driver does not support changing EEE settings!')
+            return False
+
+        current = self.ethtool.get_eee()
+        if current != enable:
+            # Assemble command executed on system. Unfortunately there is no way
+            # to change this setting via sysfs
+            cmd = f'ethtool --set-eee {self.ifname} eee '
+            cmd += 'on' if enable else 'off'
+            output, code = self._popen(cmd)
+            if code:
+                Warning(f'could not change "{self.ifname}" EEE setting!')
+            return output
+        return None
+
     def update(self, config):
         """ General helper function which works on a dictionary retrived by
         get_config_dict(). It's main intention is to consolidate the scattered
@@ -409,6 +437,9 @@ class EthernetIf(Interface):
         value = 'off' if 'disable_flow_control' in config else 'on'
         self.set_flow_control(value)
 
+        # Always disable Energy Efficient Ethernet
+        self.set_eee(False)
+
         # GRO (generic receive offload)
         self.set_gro(dict_search('offload.gro', config) != None)