[pfcwd]: create PFCWD acl instead of L3 ACL (sonic-net#479)

Signed-off-by: Sihui Han <sihan@microsoft.com>

orchagent/aclorch.cpp

@@ -498,6 +498,11 @@ shared_ptr<AclRule> AclRule::makeShared(acl_table_type_t type, AclOrch *acl, Mir
     {
         return make_shared<AclRuleL3V6>(acl, rule, table, type);
     }
+    /* Pfcwd rules can exist only in PFCWD table */
+    else if (type == ACL_TABLE_PFCWD)
+    {
+        return make_shared<AclRulePfcwd>(acl, rule, table, type);
+    }
 
     throw runtime_error("Wrong combination of table type and action in rule " + rule);
 }
@@ -739,6 +744,23 @@ void AclRuleL3::update(SubjectType, void *)
     // Do nothing
 }
 
+
+AclRulePfcwd::AclRulePfcwd(AclOrch *aclOrch, string rule, string table, acl_table_type_t type) :
+        AclRuleL3(aclOrch, rule, table, type)
+{
+}
+
+bool AclRulePfcwd::validateAddMatch(string attr_name, string attr_value)
+{
+    if (attr_name != MATCH_TC)
+    {
+        SWSS_LOG_ERROR("%s is not supported for the tables of type Pfcwd", attr_name.c_str());
+        return false;
+    }
+
+    return AclRule::validateAddMatch(attr_name, attr_value);
+}
+
 AclRuleL3V6::AclRuleL3V6(AclOrch *aclOrch, string rule, string table, acl_table_type_t type) :
         AclRuleL3(aclOrch, rule, table, type)
 {
@@ -761,6 +783,7 @@ bool AclRuleL3V6::validateAddMatch(string attr_name, string attr_value)
     return AclRule::validateAddMatch(attr_name, attr_value);
 }
 
+
 AclRuleMirror::AclRuleMirror(AclOrch *aclOrch, MirrorOrch *mirror, string rule, string table, acl_table_type_t type) :
         AclRule(aclOrch, rule, table, type),
         m_state(false),
@@ -971,6 +994,26 @@ bool AclTable::create()
     attr.value.s32list.list = bpoint_list.data();
     table_attrs.push_back(attr);
 
+    if (type == ACL_TABLE_PFCWD)
+    {
+        attr.id = SAI_ACL_TABLE_ATTR_FIELD_TC;
+        attr.value.booldata = true;
+        table_attrs.push_back(attr);
+
+        attr.id = SAI_ACL_TABLE_ATTR_ACL_STAGE;
+        attr.value.s32 = stage == ACL_STAGE_INGRESS ? SAI_ACL_STAGE_INGRESS : SAI_ACL_STAGE_EGRESS;
+        table_attrs.push_back(attr);
+
+        sai_status_t status = sai_acl_api->create_acl_table(&m_oid, gSwitchId, (uint32_t)table_attrs.size(), table_attrs.data());
+
+        if (status == SAI_STATUS_SUCCESS)
+        {
+            gCrmOrch->incCrmAclUsedCounter(CrmResourceType::CRM_ACL_TABLE, (sai_acl_stage_t) attr.value.s32, SAI_ACL_BIND_POINT_TYPE_PORT);
+        }
+
+        return status == SAI_STATUS_SUCCESS;
+    }
+
     attr.id = SAI_ACL_TABLE_ATTR_FIELD_ETHER_TYPE;
     attr.value.booldata = true;
     table_attrs.push_back(attr);

orchagent/aclorch.h

@@ -25,6 +25,7 @@
 #define TABLE_TYPE_L3        "L3"
 #define TABLE_TYPE_L3V6      "L3V6"
 #define TABLE_TYPE_MIRROR    "MIRROR"
+#define TABLE_TYPE_PFCWD     "PFCWD"
 #define TABLE_TYPE_CTRLPLANE "CTRLPLANE"
 
 #define RULE_PRIORITY           "PRIORITY"
@@ -69,6 +70,7 @@ typedef enum
     ACL_TABLE_L3,
     ACL_TABLE_L3V6,
     ACL_TABLE_MIRROR,
+    ACL_TABLE_PFCWD,
     ACL_TABLE_CTRLPLANE
 } acl_table_type_t;
 
@@ -207,6 +209,14 @@ class AclRuleL3V6: public AclRuleL3
     bool validateAddMatch(string attr_name, string attr_value);
 };
 
+class AclRulePfcwd: public AclRuleL3
+{
+public:
+    AclRulePfcwd(AclOrch *m_pAclOrch, string rule, string table, acl_table_type_t type);
+    bool validateAddMatch(string attr_name, string attr_value);
+};
+
+
 class AclRuleMirror: public AclRule
 {
 public:

orchagent/pfcactionhandler.cpp

@@ -211,7 +211,7 @@ PfcWdAclHandler::PfcWdAclHandler(sai_object_id_t port, sai_object_id_t queue,
 {
     SWSS_LOG_ENTER();
 
-    acl_table_type_t table_type = ACL_TABLE_L3;
+    acl_table_type_t table_type = ACL_TABLE_PFCWD;
 
     // There is one handler instance per queue ID
     string queuestr = to_string(queueId);
@@ -224,7 +224,7 @@ PfcWdAclHandler::PfcWdAclHandler(sai_object_id_t port, sai_object_id_t queue,
     {
         // First time of handling PFC for this queue, create ACL table, and bind
         createPfcAclTable(port, m_strIngressTable, true);
-        shared_ptr<AclRuleL3> newRule = make_shared<AclRuleL3>(gAclOrch, m_strRule, m_strIngressTable, table_type);
+        shared_ptr<AclRulePfcwd> newRule = make_shared<AclRulePfcwd>(gAclOrch, m_strRule, m_strIngressTable, table_type);
         createPfcAclRule(newRule, queueId, m_strIngressTable);
     }
     else
@@ -238,7 +238,7 @@ PfcWdAclHandler::PfcWdAclHandler(sai_object_id_t port, sai_object_id_t queue,
     {
         // First time of handling PFC for this queue, create ACL table, and bind
         createPfcAclTable(port, m_strEgressTable, false);
-        shared_ptr<AclRuleL3> newRule = make_shared<AclRuleL3>(gAclOrch, m_strRule, m_strEgressTable, table_type);
+        shared_ptr<AclRulePfcwd> newRule = make_shared<AclRulePfcwd>(gAclOrch, m_strRule, m_strEgressTable, table_type);
         createPfcAclRule(newRule, queueId, m_strEgressTable);
     }
     else
@@ -281,14 +281,14 @@ void PfcWdAclHandler::createPfcAclTable(sai_object_id_t port, string strTable, b
     assert(inserted.second);
 
     AclTable& aclTable = inserted.first->second;
-    aclTable.type = ACL_TABLE_L3;
+    aclTable.type = ACL_TABLE_PFCWD;
     aclTable.link(port);
     aclTable.id = strTable;
     aclTable.stage = ingress ? ACL_STAGE_INGRESS : ACL_STAGE_EGRESS;
     gAclOrch->addAclTable(aclTable, strTable);
 }
 
-void PfcWdAclHandler::createPfcAclRule(shared_ptr<AclRuleL3> rule, uint8_t queueId, string strTable)
+void PfcWdAclHandler::createPfcAclRule(shared_ptr<AclRulePfcwd> rule, uint8_t queueId, string strTable)
 {
     SWSS_LOG_ENTER();
 

orchagent/pfcactionhandler.h

@@ -111,7 +111,7 @@ class PfcWdAclHandler: public PfcWdLossyHandler
         string m_strEgressTable;
         string m_strRule;
         void createPfcAclTable(sai_object_id_t port, string strTable, bool ingress);
-        void createPfcAclRule(shared_ptr<AclRuleL3> rule, uint8_t queueId, string strTable);
+        void createPfcAclRule(shared_ptr<AclRulePfcwd> rule, uint8_t queueId, string strTable);
 };
 
 // PFC queue that implements drop action by draining queue with buffer of zero size