[portsorch]: Set default hostif TX queue (sonic-net#2697)

* [portsorch]: Set default hostif TX queue

* To avoid data and control packets sharing the same TX queue and possibly
  leading to control packet losses, pin control traffic to queue 7 by default.

* Use querySwitchCapability from SwitchOrch to check if SAI_HOSTIF_ATTR_QUEUE is supported

* Add a vstest

Signed-off-by: Prabhat Aravind <paravind@microsoft.com>

orchagent/portsorch.cpp

@@ -30,6 +30,7 @@
 #include "countercheckorch.h"
 #include "notifier.h"
 #include "fdborch.h"
+#include "switchorch.h"
 #include "stringutility.h"
 #include "subscriberstatetable.h"
 
@@ -49,6 +50,7 @@ extern NeighOrch *gNeighOrch;
 extern CrmOrch *gCrmOrch;
 extern BufferOrch *gBufferOrch;
 extern FdbOrch *gFdbOrch;
+extern SwitchOrch *gSwitchOrch;
 extern Directory<Orch*> gDirectory;
 extern sai_system_port_api_t *sai_system_port_api;
 extern string gMySwitchType;
@@ -61,6 +63,7 @@ extern event_handle_t g_events_handle;
 #define VLAN_PREFIX         "Vlan"
 #define DEFAULT_VLAN_ID     1
 #define MAX_VALID_VLAN_ID   4094
+#define DEFAULT_HOSTIF_TX_QUEUE 7
 
 #define PORT_SPEED_LIST_DEFAULT_SIZE                     16
 #define PORT_STATE_POLLING_SEC                            5
@@ -2599,6 +2602,23 @@ bool PortsOrch::createVlanHostIntf(Port& vl, string hostif_name)
     attr.value.chardata[SAI_HOSTIF_NAME_SIZE - 1] = '\0';
     attrs.push_back(attr);
 
+    bool set_hostif_tx_queue = false;
+    if (gSwitchOrch->querySwitchCapability(SAI_OBJECT_TYPE_HOSTIF, SAI_HOSTIF_ATTR_QUEUE))
+    {
+        set_hostif_tx_queue = true;
+    }
+    else
+    {
+        SWSS_LOG_WARN("Hostif queue attribute not supported");
+    }
+
+    if (set_hostif_tx_queue)
+    {
+        attr.id = SAI_HOSTIF_ATTR_QUEUE;
+        attr.value.u32 = DEFAULT_HOSTIF_TX_QUEUE;
+        attrs.push_back(attr);
+    }
+
     sai_status_t status = sai_hostif_api->create_hostif(&vl.m_vlan_info.host_intf_id, gSwitchId, (uint32_t)attrs.size(), attrs.data());
     if (status != SAI_STATUS_SUCCESS)
     {
@@ -4842,6 +4862,23 @@ bool PortsOrch::addHostIntfs(Port &port, string alias, sai_object_id_t &host_int
     attr.value.chardata[SAI_HOSTIF_NAME_SIZE - 1] = '\0';
     attrs.push_back(attr);
 
+    bool set_hostif_tx_queue = false;
+    if (gSwitchOrch->querySwitchCapability(SAI_OBJECT_TYPE_HOSTIF, SAI_HOSTIF_ATTR_QUEUE))
+    {
+        set_hostif_tx_queue = true;
+    }
+    else
+    {
+        SWSS_LOG_WARN("Hostif queue attribute not supported");
+    }
+
+    if (set_hostif_tx_queue)
+    {
+        attr.id = SAI_HOSTIF_ATTR_QUEUE;
+        attr.value.u32 = DEFAULT_HOSTIF_TX_QUEUE;
+        attrs.push_back(attr);
+    }
+
     sai_status_t status = sai_hostif_api->create_hostif(&host_intfs_id, gSwitchId, (uint32_t)attrs.size(), attrs.data());
     if (status != SAI_STATUS_SUCCESS)
     {

tests/dvslib/dvs_vlan.py

@@ -106,6 +106,7 @@ def verify_vlan_hostif(self, hostif_name, hostifs_oid, vlan_oid):
         assert hostif.get("SAI_HOSTIF_ATTR_TYPE") == "SAI_HOSTIF_TYPE_NETDEV"
         assert hostif.get("SAI_HOSTIF_ATTR_OBJ_ID") == vlan_oid
         assert hostif.get("SAI_HOSTIF_ATTR_NAME") == hostif_name
+        assert hostif.get("SAI_HOSTIF_ATTR_QUEUE") == "7"
 
     def get_and_verify_vlan_hostif_ids(self, expected_num, polling_config=PollingConfig()):
         hostif_entries = self.asic_db.wait_for_n_keys("ASIC_STATE:SAI_OBJECT_TYPE_HOSTIF",

tests/test_port.py

@@ -277,6 +277,17 @@ def test_PortIpredriver(self, dvs, testlog):
             if fv[0] == "SAI_PORT_ATTR_SERDES_IPREDRIVER":
                 assert fv[1] == ipre_val_asic
 
+    def test_PortHostif(self, dvs):
+        adb = swsscommon.DBConnector(1, dvs.redis_sock, 0)
+        atbl = swsscommon.Table(adb, "ASIC_STATE:SAI_OBJECT_TYPE_HOSTIF")
+        host_intfs = atbl.getKeys()
+        for intf in host_intfs:
+            status, fvs = atbl.get(intf)
+            assert status, "Error getting value for key"
+            attributes = dict(fvs)
+            hostif_queue = attributes.get("SAI_HOSTIF_ATTR_QUEUE")
+            assert hostif_queue == "7"
+
 
 # Add Dummy always-pass test at end as workaroud
 # for issue when Flaky fail on final test it invokes module tear-down before retrying