xdp: T2666: require at least 2 TX queues

1 files changed, 8 insertions, 0 deletions

diff --git a/src/conf_mode/interfaces-ethernet.py b/src/conf_mode/interfaces-ethernet.py
index 1f622c003..18ee85178 100755
--- a/src/conf_mode/interfaces-ethernet.py
+++ b/src/conf_mode/interfaces-ethernet.py
@@ -16,6 +16,7 @@
 
 import os
 
+from glob import glob
 from sys import exit
 
 from vyos.config import Config
@@ -28,6 +29,7 @@ from vyos.configverify import verify_mtu_ipv6
 from vyos.configverify import verify_vlan_config
 from vyos.configverify import verify_vrf
 from vyos.ifconfig import EthernetIf
+from vyos.util import dict_search
 from vyos import ConfigError
 from vyos import airbag
 airbag.enable()
@@ -66,6 +68,12 @@ def verify(ethernet):
     verify_address(ethernet)
     verify_vrf(ethernet)
 
+    # XDP requires multiple TX queues
+    if dict_search('offload.xdp', ethernet) != None:
+        queues = glob('/sys/class/net/{ifname}/queues/tx-*'.format(**ethernet))
+        if len(queues) < 2:
+            raise ConfigError('XDP requires additional TX queues, too few available!')
+
     if {'is_bond_member', 'mac'} <= set(ethernet):
         print(f'WARNING: changing mac address "{mac}" will be ignored as "{ifname}" '
               f'is a member of bond "{is_bond_member}"'.format(**ethernet))