[fast-reboot] Fix dump script to support PortChannels in a VLAN group (sonic-net#1393)

Add PortChannels to the list of interfaces (port_id_2_iface) to support FDB dump for PortChannel in a VLAN group.

Fix sonic-net#4793

- How I did it

- Get LAG ID from the DB.
- Find the LAG name from APP DB.
- Add it to the list of 'port_id_2_iface' to be used.

- How to verify it
Reproduce the issue mentioned on this PR and try to run fast-reboot with this fix.

- Previous command output (if the output of a command-line utility has changed)
Traceback:
src_ifs = {map_mac_ip_per_vlan[vlan_name][dst_mac] for vlan_name, dst_mac, _ in arp_entries}
KeyError: 'b8:59:9f:a8:e2:00'

Signed-off-by: Shlomi Bitton <[email protected]>

Author: shlomibitton

scripts/fast-reboot-dump.py

@@ -39,10 +39,7 @@ def generate_neighbor_entries(filename, all_available_macs):
         }
         arp_output.append(obj)
 
-        ip_addr = key.split(':')[2]
-        if ipaddress.ip_interface(str(ip_addr)).ip.version != 4:
-            #This is ipv6 address
-            ip_addr = key.replace(key.split(':')[0] + ':' + key.split(':')[1] + ':', '')
+        ip_addr = key.split(':', 2)[2]
         neighbor_entries.append((vlan_name, mac, ip_addr))
         syslog.syslog(syslog.LOG_INFO, "Neighbor entry: [Vlan: %s, Mac: %s, Ip: %s]" % (vlan_name, mac, ip_addr))
 
@@ -80,23 +77,58 @@ def get_bridge_port_id_2_port_id(db):
 
     return bridge_port_id_2_port_id
 
-def get_map_port_id_2_iface_name(db):
-    port_id_2_iface = {}
-    keys = db.keys(db.ASIC_DB, 'ASIC_STATE:SAI_OBJECT_TYPE_HOSTIF:oid:*')
+def get_lag_by_member(member_name, app_db):
+    keys = app_db.keys(app_db.APPL_DB, 'LAG_MEMBER_TABLE:*')
     keys = [] if keys is None else keys
     for key in keys:
-        value = db.get_all(db.ASIC_DB, key)
+        _, lag_name, lag_member_name = key.split(":")
+        if lag_member_name == member_name:
+            return lag_name
+    return None
+
+def get_map_host_port_id_2_iface_name(asic_db):
+    host_port_id_2_iface = {}
+    keys = asic_db.keys(asic_db.ASIC_DB, 'ASIC_STATE:SAI_OBJECT_TYPE_HOSTIF:oid:*')
+    keys = [] if keys is None else keys
+    for key in keys:
+        value = asic_db.get_all(asic_db.ASIC_DB, key)
         if value['SAI_HOSTIF_ATTR_TYPE'] != 'SAI_HOSTIF_TYPE_NETDEV':
             continue
         port_id = value['SAI_HOSTIF_ATTR_OBJ_ID']
         iface_name = value['SAI_HOSTIF_ATTR_NAME']
-        port_id_2_iface[port_id] = iface_name
+        host_port_id_2_iface[port_id] = iface_name
+    
+    return host_port_id_2_iface
+
+def get_map_lag_port_id_2_portchannel_name(asic_db, app_db, host_port_id_2_iface):
+    lag_port_id_2_iface = {}
+    keys = asic_db.keys(asic_db.ASIC_DB, 'ASIC_STATE:SAI_OBJECT_TYPE_LAG_MEMBER:oid:*')
+    keys = [] if keys is None else keys
+    for key in keys:
+        value = asic_db.get_all(asic_db.ASIC_DB, key)
+        lag_id = value['SAI_LAG_MEMBER_ATTR_LAG_ID']
+        if lag_id in lag_port_id_2_iface:
+            continue
+        member_id = value['SAI_LAG_MEMBER_ATTR_PORT_ID']
+        member_name = host_port_id_2_iface[member_id]
+        lag_name = get_lag_by_member(member_name, app_db)
+        if lag_name is not None:
+            lag_port_id_2_iface[lag_id] = lag_name
+
+    return lag_port_id_2_iface
+
+def get_map_port_id_2_iface_name(asic_db, app_db):
+    port_id_2_iface = {}
+    host_port_id_2_iface = get_map_host_port_id_2_iface_name(asic_db)
+    port_id_2_iface.update(host_port_id_2_iface)
+    lag_port_id_2_iface = get_map_lag_port_id_2_portchannel_name(asic_db, app_db, host_port_id_2_iface)
+    port_id_2_iface.update(lag_port_id_2_iface)
 
     return port_id_2_iface
 
-def get_map_bridge_port_id_2_iface_name(db):
-    bridge_port_id_2_port_id = get_bridge_port_id_2_port_id(db)
-    port_id_2_iface = get_map_port_id_2_iface_name(db)
+def get_map_bridge_port_id_2_iface_name(asic_db, app_db):
+    bridge_port_id_2_port_id = get_bridge_port_id_2_port_id(asic_db)
+    port_id_2_iface = get_map_port_id_2_iface_name(asic_db, app_db)
 
     bridge_port_id_2_iface_name = {}
 
@@ -158,29 +190,37 @@ def get_fdb(db, vlan_name, vlan_id, bridge_id_2_iface):
     return fdb_entries, available_macs, map_mac_ip
 
 def generate_fdb_entries(filename):
-    fdb_entries = []
+    asic_db = swsssdk.SonicV2Connector(host='127.0.0.1')
+    app_db = swsssdk.SonicV2Connector(host='127.0.0.1')
+    asic_db.connect(asic_db.ASIC_DB, False)   # Make one attempt only
+    app_db.connect(app_db.APPL_DB, False)   # Make one attempt only
 
-    db = SonicV2Connector(use_unix_socket_path=False)
-    db.connect(db.ASIC_DB, False)   # Make one attempt only
+    vlan_ifaces = get_vlan_ifaces()
 
-    bridge_id_2_iface = get_map_bridge_port_id_2_iface_name(db)
+    fdb_entries, all_available_macs, map_mac_ip_per_vlan = generate_fdb_entries_logic(asic_db, app_db, vlan_ifaces)
 
-    vlan_ifaces = get_vlan_ifaces()
+    asic_db.close(asic_db.ASIC_DB)
+    app_db.close(app_db.APPL_DB)
+
+    with open(filename, 'w') as fp:
+        json.dump(fdb_entries, fp, indent=2, separators=(',', ': '))
 
+    return all_available_macs, map_mac_ip_per_vlan
+
+def generate_fdb_entries_logic(asic_db, app_db, vlan_ifaces):
+    fdb_entries = []
     all_available_macs = set()
     map_mac_ip_per_vlan = {}
+
+    bridge_id_2_iface = get_map_bridge_port_id_2_iface_name(asic_db, app_db)
+
     for vlan in vlan_ifaces:
         vlan_id = int(vlan.replace('Vlan', ''))
-        fdb_entry, available_macs, map_mac_ip_per_vlan[vlan] = get_fdb(db, vlan, vlan_id, bridge_id_2_iface)
+        fdb_entry, available_macs, map_mac_ip_per_vlan[vlan] = get_fdb(asic_db, vlan, vlan_id, bridge_id_2_iface)
         all_available_macs |= available_macs
         fdb_entries.extend(fdb_entry)
 
-    db.close(db.ASIC_DB)
-
-    with open(filename, 'w') as fp:
-        json.dump(fdb_entries, fp, indent=2, separators=(',', ': '))
-
-    return all_available_macs, map_mac_ip_per_vlan
+    return fdb_entries, all_available_macs, map_mac_ip_per_vlan
 
 def get_if(iff, cmd):
     s = socket.socket()

setup.py

@@ -170,6 +170,7 @@
         'swsssdk>=2.0.1',
         'tabulate==0.8.2',
         'xmltodict==0.12.0',
+        'deepdiff==5.2.3',
     ],
     setup_requires= [
         'pytest-runner',

tests/fast_reboot_dump_dbs/APPL_DB.json

@@ -0,0 +1,10 @@
+{
+  "LAG_MEMBER_TABLE:PortChannel0001:Ethernet128": {
+    "expireat": 1613562033.6011732, 
+    "ttl": -0.001, 
+    "type": "hash", 
+    "value": {
+      "status": "enabled"
+    }
+  }
+}

tests/fast_reboot_dump_dbs/ASIC_DB.json

@@ -0,0 +1,62 @@
+{
+  "ASIC_STATE:SAI_OBJECT_TYPE_BRIDGE_PORT:oid:0x3a000000001724": {
+    "expireat": 1613562026.636173, 
+    "ttl": -0.001, 
+    "type": "hash", 
+    "value": {
+      "SAI_BRIDGE_PORT_ATTR_ADMIN_STATE": "true", 
+      "SAI_BRIDGE_PORT_ATTR_FDB_LEARNING_MODE": "SAI_BRIDGE_PORT_FDB_LEARNING_MODE_HW", 
+      "SAI_BRIDGE_PORT_ATTR_PORT_ID": "oid:0x20000000016ea", 
+      "SAI_BRIDGE_PORT_ATTR_TYPE": "SAI_BRIDGE_PORT_TYPE_PORT"
+    }
+  }, 
+  "ASIC_STATE:SAI_OBJECT_TYPE_HOSTIF:oid:0xd000000000eea": {
+    "expireat": 1613562026.59113, 
+    "ttl": -0.001, 
+    "type": "hash", 
+    "value": {
+      "SAI_HOSTIF_ATTR_NAME": "Ethernet128", 
+      "SAI_HOSTIF_ATTR_OBJ_ID": "oid:0x1000000000ec1", 
+      "SAI_HOSTIF_ATTR_OPER_STATUS": "true", 
+      "SAI_HOSTIF_ATTR_TYPE": "SAI_HOSTIF_TYPE_NETDEV", 
+      "SAI_HOSTIF_ATTR_VLAN_TAG": "SAI_HOSTIF_VLAN_TAG_KEEP"
+    }
+  }, 
+  "ASIC_STATE:SAI_OBJECT_TYPE_LAG_MEMBER:oid:0x1b0000000016ee": {
+    "expireat": 1613562026.634684, 
+    "ttl": -0.001, 
+    "type": "hash", 
+    "value": {
+      "SAI_LAG_MEMBER_ATTR_EGRESS_DISABLE": "false", 
+      "SAI_LAG_MEMBER_ATTR_INGRESS_DISABLE": "false", 
+      "SAI_LAG_MEMBER_ATTR_LAG_ID": "oid:0x20000000016ea", 
+      "SAI_LAG_MEMBER_ATTR_PORT_ID": "oid:0x1000000000ec1"
+    }
+  }, 
+  "ASIC_STATE:SAI_OBJECT_TYPE_FDB_ENTRY:{\"bvid\":\"oid:0x260000000016f3\",\"mac\":\"52:54:00:5D:FC:B7\",\"switch_id\":\"oid:0x21000000000000\"}": {
+    "expireat": 1613562026.593537, 
+    "ttl": -0.001, 
+    "type": "hash", 
+    "value": {
+      "SAI_FDB_ENTRY_ATTR_BRIDGE_PORT_ID": "oid:0x3a000000001724", 
+      "SAI_FDB_ENTRY_ATTR_PACKET_ACTION": "SAI_PACKET_ACTION_FORWARD", 
+      "SAI_FDB_ENTRY_ATTR_TYPE": "SAI_FDB_ENTRY_TYPE_DYNAMIC"
+    }
+  }, 
+  "ASIC_STATE:SAI_OBJECT_TYPE_VLAN:oid:0x26000000000013": {
+    "expireat": 1613562026.598609, 
+    "ttl": -0.001, 
+    "type": "hash", 
+    "value": {
+      "NULL": "NULL"
+    }
+  }, 
+  "ASIC_STATE:SAI_OBJECT_TYPE_VLAN:oid:0x260000000016f3": {
+    "expireat": 1613562026.589369, 
+    "ttl": -0.001, 
+    "type": "hash", 
+    "value": {
+      "SAI_VLAN_ATTR_VLAN_ID": "2"
+    }
+  }
+}

tests/fast_reboot_dump_test.py

@@ -0,0 +1,50 @@
+import json
+import os
+from deepdiff import DeepDiff
+from utilities_common.db import Db
+import importlib
+fast_reboot_dump = importlib.import_module("scripts.fast-reboot-dump")
+
+class TestFastRebootDump(object):
+
+    @classmethod
+    def setup_class(cls):
+        print("SETUP")
+
+        test_db_dumps_directory = os.getcwd() + '/tests/fast_reboot_dump_dbs'
+        asic_db_object = Db()
+        app_db_object = Db()
+        asic_db = asic_db_object.db
+        app_db = app_db_object.db
+        populate_db(asic_db, test_db_dumps_directory, 'ASIC_DB.json')
+        populate_db(app_db, test_db_dumps_directory, 'APPL_DB.json')
+
+        cls.asic_db = asic_db
+        cls.app_db = app_db
+
+    #Test fast-reboot-dump script to generate all required objects when there is a VLAN interface with a PortChannel member.
+    def test_generate_fdb_entries_vlan_portcahnnel_member(self):
+        vlan_ifaces = ['Vlan2']
+
+        fdb_entries, all_available_macs, map_mac_ip_per_vlan = fast_reboot_dump.generate_fdb_entries_logic(self.asic_db, self.app_db, vlan_ifaces)
+
+        expectd_fdb_entries = [{'FDB_TABLE:Vlan2:52-54-00-5D-FC-B7': {'type': 'dynamic', 'port': 'PortChannel0001'}, 'OP': 'SET'}]
+        assert not DeepDiff(fdb_entries, expectd_fdb_entries, ignore_order=True)
+
+        expectd_all_available_macs = {('Vlan2', '52:54:00:5d:fc:b7')}
+        assert not DeepDiff(all_available_macs, expectd_all_available_macs, ignore_order=True)
+
+        expectd_map_mac_ip_per_vlan = {'Vlan2': {'52:54:00:5d:fc:b7': 'PortChannel0001'}}
+        assert not DeepDiff(map_mac_ip_per_vlan, expectd_map_mac_ip_per_vlan, ignore_order=True)
+    
+    @classmethod
+    def teardown_class(cls):
+        print("TEARDOWN")
+
+def populate_db(dbconn, test_db_dumps_directory, db_dump_filename):
+    db = getattr(dbconn, db_dump_filename.replace('.json',''))
+    with open(test_db_dumps_directory + '/' + db_dump_filename) as DB:
+        db_dump = json.load(DB)
+        for table, fields in db_dump.items():
+            for key, value in fields['value'].items():
+                dbconn.set(db, table, key, value)