rfs: T4689: Support RFS(Receive Flow Steering)

3 files changed, 49 insertions, 0 deletions

diff --git a/interface-definitions/interfaces-ethernet.xml.in b/interface-definitions/interfaces-ethernet.xml.in
index c821f04b2..a85296209 100644
--- a/interface-definitions/interfaces-ethernet.xml.in
+++ b/interface-definitions/interfaces-ethernet.xml.in
@@ -94,6 +94,12 @@
                   <valueless/>
                 </properties>
               </leafNode>
+              <leafNode name="rfs">
+                <properties>
+                  <help>Enable Receive Flow Steering</help>
+                  <valueless/>
+                </properties>
+              </leafNode>
               <leafNode name="sg">
                 <properties>
                   <help>Enable Scatter-Gather</help>
diff --git a/python/vyos/ifconfig/ethernet.py b/python/vyos/ifconfig/ethernet.py
index b8deb3311..eac72ab8c 100644
--- a/python/vyos/ifconfig/ethernet.py
+++ b/python/vyos/ifconfig/ethernet.py
@@ -16,6 +16,7 @@
 import os
 import re
 
+from glob import glob
 from vyos.ethtool import Ethtool
 from vyos.ifconfig.interface import Interface
 from vyos.util import run
@@ -74,6 +75,10 @@ class EthernetIf(Interface):
             'convert': lambda cpus: cpus if cpus else '0',
             'location': '/sys/class/net/{ifname}/queues/rx-0/rps_cpus',
         },
+        'rfs': {
+            'convert': lambda num: num if num else '0',
+            'location': '/proc/sys/net/core/rps_sock_flow_entries',
+        },
     }}
 
     def __init__(self, ifname, **kargs):
@@ -258,6 +263,22 @@ class EthernetIf(Interface):
         # send bitmask representation as hex string without leading '0x'
         return self.set_interface('rps', rps_cpus)
 
+    def set_rfs(self, state):
+        rfs_flow = 0
+        global_rfs_flow = 0
+        ifname = self.config['ifname']
+        queues = glob(f'/sys/class/net/{ifname}/queues/rx-*')
+        if state:
+            global_rfs_flow = 32768
+            rfs_flow = global_rfs_flow/len(queues)
+
+        self.set_interface('rfs', str(int(global_rfs_flow)))
+
+        for i in range(0,len(queues)):
+            self._write_sysfs(f'/sys/class/net/{ifname}/queues/rx-{i}/rps_flow_cnt',str(int(rfs_flow)))
+
+        return state
+
     def set_sg(self, state):
         """
         Enable Scatter-Gather support. State can be either True or False.
@@ -342,6 +363,9 @@ class EthernetIf(Interface):
         # RPS - Receive Packet Steering
         self.set_rps(dict_search('offload.rps', config) != None)
 
+        # RFS - Receive Flow Steering
+        self.set_rfs(dict_search('offload.rfs', config) != None)
+
         # scatter-gather option
         self.set_sg(dict_search('offload.sg', config) != None)
 
diff --git a/smoketest/scripts/cli/test_interfaces_ethernet.py b/smoketest/scripts/cli/test_interfaces_ethernet.py
index 05d2ae5f5..529655f6a 100755
--- a/smoketest/scripts/cli/test_interfaces_ethernet.py
+++ b/smoketest/scripts/cli/test_interfaces_ethernet.py
@@ -17,6 +17,7 @@
 import os
 import re
 import unittest
+from glob import glob
 
 from netifaces import AF_INET
 from netifaces import AF_INET6
@@ -185,6 +186,24 @@ class EthernetInterfaceTest(BasicInterfaceTest.TestCase):
 
             self.assertEqual(f'{cpus:x}', f'{rps_cpus:x}')
 
+    def test_offloading_rfs(self):
+        global_rfs_flow = 32768
+        rfs_flow = global_rfs_flow
+
+        for interface in self._interfaces:
+            self.cli_set(self._base_path + [interface, 'offload', 'rfs'])
+        self.cli_commit()
+
+        for interface in self._interfaces:
+            queues = glob(f'/sys/class/net/{interface}/queues/rx-*')
+            rfs_flow = global_rfs_flow/len(queues)
+            for i in range(0,len(queues)):
+                flows = read_file(f'/sys/class/net/{interface}/queues/rx-{i}/rps_flow_cnt')
+                self.assertEqual(int(flows), int(rfs_flow))
+
+        global_flows = read_file(f'/proc/sys/net/core/rps_sock_flow_entries')
+        self.assertEqual(int(global_flows), int(global_rfs_flow))
+
     def test_non_existing_interface(self):
         unknonw_interface = self._base_path + ['eth667']
         self.cli_set(unknonw_interface)