yang models for device_metadata, device_neighbor, flex_counters, crm, versions. Processing code and tests.

src/sonic-yang-models/yang-models/sonic-breakout_cfg.yang

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+module sonic-breakout_cfg {
+
+    yang-version 1.1;
+
+    namespace "http://github.com/Azure/sonic-breakout_cfg";
+    prefix breakout_cfg;
+
+    import sonic-extension {
+        prefix ext;
+        revision-date 2019-07-01;
+    }
+
+    description "BREAKOUT_CFG YANG Module for SONiC OS";
+
+    revision 2020-04-10 {
+        description "First Revision";
+    }
+
+    container sonic-breakout_cfg {
+
+        container BREAKOUT_CFG {
+
+            description "BREAKOUT_CFG part of config_db.json";
+
+            list BREAKOUT_CFG_LIST {
+
+                key "port";
+
+                ext:key-regex-configdb-to-yang "^([a-zA-Z0-9_-]+)$";
+
+                ext:key-regex-yang-to-configdb "<port>";
+
+                leaf port {
+                    type string {
+                        length 1..255;
+                    }
+                }
+
+                leaf brkout_mode {
+                    type string {
+                        length 1..64;
+                        /* should be not allow any pattern here, since this is
+                         * auto populated by cli.
+                         */
+                        /* pattern "1x100G[40G]|2x50G|4x25G[10G]"; */
+                    }
+                }
+            }
+            /* end of list BREAKOUT_CFG_LIST */
+        }
+        /* end of container BREAKOUT_CFG */
+	}
+	/* end of top level container */
+}
+/* end of module sonic-breakout_cfg */

src/sonic-yang-models/yang-models/sonic-crm.yang

@@ -0,0 +1,203 @@
+module sonic-crm {
+
+    yang-version 1.1;
+
+    namespace "http://github.com/Azure/sonic-crm";
+    prefix crm;
+
+    import sonic-types {
+        prefix stypes;
+        revision-date 2019-07-01;
+    }
+
+    description "BREAKOUT_CFG YANG Module for SONiC OS";
+
+    revision 2020-04-10 {
+        description "First Revision";
+    }
+
+    container sonic-crm {
+
+        container CRM {
+
+            description "CRM part of config_db.json";
+
+            container Config {
+
+                /* typedef specific to CRM */
+                typedef threshold {
+                    type uint16;
+                }
+
+                leaf acl_counter_threshold_type {
+                    must "(((current()='PERCENTAGE' or current()='percentage') and
+                        ../acl_counter_high_threshold<100 and
+                        ../acl_counter_low_threshold<100) or
+                        (current()!='PERCENTAGE' and current()!='PERCENTAGE'))";
+                    type stypes:crm_threshold_type;
+                }
+
+                leaf acl_counter_high_threshold {
+                    type threshold;
+                }
+
+                leaf acl_counter_low_threshold {
+                    type threshold;
+                }
+
+                leaf acl_group_threshold_type {
+                    must "(((current()='PERCENTAGE' or current()='percentage') and
+                        ../acl_group_high_threshold<100 and
+                        ../acl_group_low_threshold<100) or
+                        (current()!='PERCENTAGE' and current()!='PERCENTAGE'))";
+                    type stypes:crm_threshold_type;
+                }
+
+                leaf acl_group_high_threshold {
+                    type threshold;
+                }
+
+                leaf acl_group_low_threshold {
+                    type threshold;
+                }
+
+                leaf acl_entry_threshold_type {
+                    must "(((current()='PERCENTAGE' or current()='percentage') and
+                        ../acl_entry_high_threshold<100 and
+                        ../acl_entry_low_threshold<100) or
+                        (current()!='PERCENTAGE' and current()!='PERCENTAGE'))";
+                    type stypes:crm_threshold_type;
+                }
+
+                leaf acl_entry_high_threshold {
+                    type threshold;
+                }
+
+                leaf acl_entry_low_threshold {
+                    type threshold;
+                }
+
+                leaf acl_table_threshold_type {
+                    must "(((current()='PERCENTAGE' or current()='percentage') and
+                        ../acl_table_high_threshold<100 and
+                        ../acl_table_low_threshold<100) or
+                        (current()!='PERCENTAGE' and current()!='PERCENTAGE'))";
+                    type stypes:crm_threshold_type;
+                }
+
+                leaf acl_table_high_threshold {
+                    type threshold;
+                }
+
+                leaf acl_table_low_threshold {
+                    type threshold;
+                }
+
+                leaf fdb_entry_threshold_type {
+                    must "(((current()='PERCENTAGE' or current()='percentage') and
+                        ../fdb_entry_high_threshold<100 and
+                        ../fdb_entry_low_threshold<100) or
+                        (current()!='PERCENTAGE' and current()!='PERCENTAGE'))";
+                    type stypes:crm_threshold_type;
+                }
+
+                leaf fdb_entry_high_threshold {
+                    type threshold;
+                }
+
+                leaf fdb_entry_low_threshold {
+                    type threshold;
+                }
+
+                leaf ipv4_neighbor_threshold_type {
+                    must "(((current()='PERCENTAGE' or current()='percentage') and
+                        ../ipv4_neighbor_high_threshold<100 and
+                        ../ipv4_neighbor_low_threshold<100) or
+                        (current()!='PERCENTAGE' and current()!='PERCENTAGE'))";
+                    type stypes:crm_threshold_type;
+                }
+
+                leaf ipv4_neighbor_high_threshold {
+                    type threshold;
+                }
+
+                leaf ipv4_neighbor_low_threshold {
+                    type threshold;
+                }
+
+                leaf ipv4_nexthop_threshold_type {
+                    must "(((current()='PERCENTAGE' or current()='percentage') and
+                        ../ipv4_nexthop_high_threshold<100 and
+                        ../ipv4_nexthop_low_threshold<100) or
+                        (current()!='PERCENTAGE' and current()!='PERCENTAGE'))";
+                    type stypes:crm_threshold_type;
+                }
+
+                leaf ipv4_nexthop_high_threshold {
+                    type threshold;
+                }
+
+                leaf ipv4_nexthop_low_threshold {
+                    type threshold;
+                }
+
+                leaf ipv4_route_threshold_type {
+                    must "(((current()='PERCENTAGE' or current()='percentage') and
+                        ../ipv4_route_high_threshold<100 and
+                        ../ipv4_route_low_threshold<100) or
+                        (current()!='PERCENTAGE' and current()!='PERCENTAGE'))";
+                    type stypes:crm_threshold_type;
+                }
+
+                leaf ipv4_route_high_threshold {
+                    type threshold;
+                }
+
+                leaf ipv4_route_low_threshold {
+                    type threshold;
+                }
+
+                leaf ipv6_nexthop_threshold_type {
+                    must "(((current()='PERCENTAGE' or current()='percentage') and
+                        ../ipv6_nexthop_high_threshold<100 and
+                        ../ipv6_nexthop_low_threshold<100) or
+                        (current()!='PERCENTAGE' and current()!='PERCENTAGE'))";
+                    type stypes:crm_threshold_type;
+                }
+
+                leaf ipv6_nexthop_high_threshold {
+                    type threshold;
+                }
+
+                leaf ipv6_nexthop_low_threshold {
+                    type threshold;
+                }
+
+                leaf ipv6_route_threshold_type {
+                    must "(((current()='PERCENTAGE' or current()='percentage') and
+                        ../ipv6_route_high_threshold<100 and
+                        ../ipv6_route_low_threshold<100) or
+                        (current()!='PERCENTAGE' and current()!='PERCENTAGE'))";
+                    type stypes:crm_threshold_type;
+                }
+
+                leaf ipv6_route_high_threshold {
+                    type threshold;
+                }
+
+                leaf ipv6_route_low_threshold {
+                    type threshold;
+                }
+
+                leaf polling_interval {
+                    type threshold;
+                }
+
+            }
+            /* end of Config */
+        }
+        /* end of container CRM */
+    }
+    /* end of top level container */
+}
+/* end of module sonic-crm */

src/sonic-yang-models/yang-models/sonic-device_metadata.yang

@@ -0,0 +1,96 @@
+module sonic-device_metadata {
+
+    yang-version 1.1;
+
+    namespace "http://github.com/Azure/sonic-device_metadata";
+    prefix device_metadata;
+
+    import ietf-yang-types {
+        prefix yang;
+    }
+
+    import ietf-inet-types {
+        prefix inet;
+    }
+
+    import sonic-types {
+        prefix stypes;
+        revision-date 2019-07-01;
+    }
+
+    description "DEVICE_METADATA YANG Module for SONiC OS";
+
+    revision 2020-04-10 {
+        description "First Revision";
+    }
+
+    container sonic-device_metadata {
+
+        container DEVICE_METADATA {
+
+            description "DEVICE_METADATA part of config_db.json";
+
+            container localhost{
+
+                leaf hwsku {
+                    type stypes:hwsku;
+                }
+
+                leaf default_bgp_status {
+                    type enumeration {
+                        enum UP;
+                        enum DOWN;
+                    }
+                }
+
+                leaf docker_routing_config_mode {
+                    type enumeration {
+                        enum unified;
+                        enum split;
+                    }
+                }
+
+                leaf hostname {
+                    type string {
+                        length 1..255;
+                    }
+                }
+
+                leaf platform {
+                    type string {
+                        length 1..255;
+                    }
+                }
+
+                leaf mac {
+                    type yang:mac-address;
+                }
+
+                leaf default_pfcwd_status {
+                    type enumeration {
+                        enum disable;
+                        enum enable;
+                    }
+                }
+
+                leaf bgp_asn {
+                    type inet:as-number;
+                }
+
+                leaf deployment_id {
+                    type uint32;
+                }
+
+                leaf type {
+                    type string {
+                        length 1..255;
+                    }
+                }
+            }
+            /* end of container localhost */
+        }
+        /* end of container DEVICE_METADATA */
+	}
+	/* end of top level container */
+}
+/* end of module sonic-device_metadata */