stats: counters data model

This adds a new data model for counters.
Specifying the errors severity and unit.
A later patch will update vpp_get_stats to take advantage of this.
Only the map plugin is updates as an example.

New .api language:
A new "counters" keyword to define counter sets.

counters map {
  none {
    severity info;
    type counter64;
    units "packets";
    description "valid MAP packets";
  };
  bad_protocol {
    severity error;
    type counter64;
    units "packets";
    description "bad protocol";
  };
};

Each counter has 4 keywords. severity, which is one of error, info or warn.
A type, which is one of counter64 or gauge64.
units, which is a text field using units from YANG.

paths {
  "/err/ip4-map" "map";
  "/err/ip6-map" "map";
  "/err/ip4-t-map" "map";
  "/err/ip6-t-map" "map";
};

A new paths keyword that maps the counter-set to a path in the stats segment KV store.

Updated VPP CLI to include severity so user can see error counter severity.
DBGvpp# show errors
   Count               Node                    Reason        Severity
        13        ethernet-input              no error         error

Type: feature
Signed-off-by: Ole Troan <ot@cisco.com>
Change-Id: Ib2177543f49d4c3aef4d7fa72476cff2068f7771
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 114 insertions, 0 deletions

diff --git a/src/plugins/map/map.api b/src/plugins/map/map.api
index fa32978591c..dfe255bf349 100644
--- a/src/plugins/map/map.api
+++ b/src/plugins/map/map.api
@@ -349,3 +349,117 @@ define map_param_get_reply
   bool tc_copy;
   u8 tc_class;
 };
+
+/*
+ * MAP Error counters/messages
+ */
+counters map {
+  none {
+    severity info;
+    type counter64;
+    units "packets";
+    description "valid MAP packets";
+  };
+  bad_protocol {
+    severity error;
+    type counter64;
+    units "packets";
+    description "bad protocol";
+  };
+  sec_check {
+    severity error;
+    type counter64;
+    units "packets";
+    description "security check failed";
+  };
+  encap_sec_check {
+    severity error;
+    type counter64;
+    units "packets";
+    description "encap security check failed";
+  };
+  decap_sec_check {
+    severity error;
+    type counter64;
+    units "packets";
+    description "decap security check failed";
+  };
+  icmp {
+    severity error;
+    type counter64;
+    units "packets";
+    description "unable to translate ICMP";
+  };
+  icmp_relay {
+    severity error;
+    type counter64;
+    units "packets";
+    description "unable to relay ICMP";
+  };
+  unknown {
+    severity error;
+    type counter64;
+    units "packets";
+    description "unknown";
+  };
+  no_binding {
+    severity error;
+    type counter64;
+    units "packets";
+    description "no binding";
+  };
+  no_domain {
+    severity error;
+    type counter64;
+    units "packets";
+    description "no domain";
+  };
+  fragmented {
+    severity error;
+    type counter64;
+    units "packets";
+    description "packet is a fragment";
+  };
+  fragment_memory {
+    severity error;
+    type counter64;
+    units "packets";
+    description "could not cache fragment";
+  };
+  fragment_malformed {
+    severity error;
+    type counter64;
+    units "packets";
+    description "fragment has unexpected format";
+  };
+  fragment_dropped {
+    severity error;
+    type counter64;
+    units "packets";
+    description "dropped cached fragment";
+  };
+  malformed {
+    severity error;
+    type counter64;
+    units "packets";
+    description "malformed packet";
+  };
+  df_set {
+    severity error;
+    type counter64;
+    units "packets";
+    description "can't fragment, DF set";
+  };
+  time_exceeded {
+    severity error;
+    type counter64;
+    units "packets";
+    description "time exceeded";
+  };
+};
+paths {
+  "/err/ip4-map" "map";
+  "/err/ip6-map" "map";
+  "/err/ip4-t-map" "map";
+  "/err/ip6-t-map" "map";
+};