Ignore order when compare QOS MAP list entries (sonic-net#372)

meta/sai_serialize.h

@@ -135,6 +135,9 @@ std::string sai_serialize_l2mc_entry_type(
 std::string sai_serialize_ipmc_entry_type(
         _In_ const sai_ipmc_entry_type_t type);
 
+std::string sai_serialize_qos_map_item(
+        _In_ const sai_qos_map_t& qosmap);
+
 // serialize ntf
 
 std::string sai_serialize_fdb_event_ntf(

meta/saiserialize.cpp

@@ -1065,6 +1065,19 @@ json sai_serialize_qos_map(
     return j;
 }
 
+std::string sai_serialize_qos_map_item(
+        _In_ const sai_qos_map_t& qosmap)
+{
+    SWSS_LOG_ENTER();
+
+    json j;
+
+    j["key"]    = sai_serialize_qos_map_params(qosmap.key);
+    j["value"]  = sai_serialize_qos_map_params(qosmap.value);;
+
+    return j.dump();
+}
+
 std::string sai_serialize_qos_map_list(
         _In_ const sai_qos_map_list_t& qosmap,
         _In_ bool countOnly)

syncd/syncd_applyview.cpp

@@ -2053,6 +2053,55 @@ bool hasEqualObjectList(
     return true;
 }
 
+/**
+ * @brief Compare qos map list attributes order insensitive.
+ *
+ * @param current Current object qos map attribute.
+ * @param temporary Temporary object qos map attribute.
+ *
+ * @return True if attributes are equal, false otherwise.
+ */
+bool hasEqualQosMapList(
+        _In_ const std::shared_ptr<const SaiAttr> &current,
+        _In_ const std::shared_ptr<const SaiAttr> &temporary)
+{
+    SWSS_LOG_ENTER();
+
+    auto c = current->getSaiAttr()->value.qosmap;
+    auto t = temporary->getSaiAttr()->value.qosmap;
+
+    if (c.count != t.count)
+        return false;
+
+    if (c.list == NULL || t.list == NULL)
+        return false;
+
+    std::vector<std::string> citems;
+    std::vector<std::string> titems;
+
+    for (uint32_t i = 0; i < c.count; i++)
+    {
+        citems.push_back(sai_serialize_qos_map_item(c.list[i]));
+        titems.push_back(sai_serialize_qos_map_item(t.list[i]));
+    }
+
+    std::sort(citems.begin(), citems.end());
+    std::sort(titems.begin(), titems.end());
+
+    for (uint32_t i = 0; i < c.count; i++)
+    {
+        if (citems.at(i) != titems.at(i))
+        {
+            return false;
+        }
+    }
+
+    SWSS_LOG_NOTICE("qos map are equal, but has different order");
+
+    // all items in both attributes are equal
+    return true;
+}
+
 /**
  * @brief Check if current and temporary object has
  * the same attribute and attribute has the same value on both.
@@ -2117,6 +2166,16 @@ bool hasEqualAttribute(
             return true;
         }
 
+        if (currentAttr->getAttrMetadata()->attrvaluetype == SAI_ATTR_VALUE_TYPE_QOS_MAP_LIST)
+        {
+            /*
+             * In case of qos map list, order of list does not matter, so
+             * compare only entries.
+             */
+
+            return hasEqualQosMapList(currentAttr, temporaryAttr);
+        }
+
         if (currentAttr->isObjectIdAttr() == false)
         {
             /*

tests/brcm.pl

@@ -268,9 +268,18 @@ sub test_brcm_lag_no_members
     play "lag_no_members.rec", 0;
 }
 
+sub test_brcm_qos_map_order
+{
+    fresh_start;
+
+    # we expect no asic operation on qos maps that are the same but different order
+
+    play "qos_map_order.rec", 0;
+}
 
 # RUN TESTS
 
+test_brcm_qos_map_order;
 test_brcm_lag_no_members;
 test_brcm_rif_loopback;
 test_brcm_hostif;