From d0b973030fe07dc7875da72f5ebe42d8bd9544b1 Mon Sep 17 00:00:00 2001
From: Vladimir Lavor <vlavor@cisco.com>
Date: Thu, 11 Mar 2021 15:27:02 +0100
Subject: Recognize stat_dir_type_empty

Do not to handle empty stats directory as unknown.
Empty dir's value is always treated as zero.

Change-Id: I40a3829675c5b7c9da80ceaa7e2d0a87fe02dc7c
Signed-off-by: Vladimir Lavor <vlavor@cisco.com>
---
 adapter/stats_api.go              | 10 ++++++++++
 adapter/statsclient/statseg_v2.go |  1 +
 2 files changed, 11 insertions(+)

diff --git a/adapter/stats_api.go b/adapter/stats_api.go
index 4b398f5..d15dee8 100644
--- a/adapter/stats_api.go
+++ b/adapter/stats_api.go
@@ -60,6 +60,7 @@ const (
 	CombinedCounterVector StatType = 3
 	ErrorIndex            StatType = 4
 	NameVector            StatType = 5
+	Empty                 StatType = 6
 )
 
 func (d StatType) String() string {
@@ -74,6 +75,8 @@ func (d StatType) String() string {
 		return "ErrorIndex"
 	case NameVector:
 		return "NameVector"
+	case Empty:
+		return "Empty"
 	}
 	return fmt.Sprintf("UnknownStatType(%d)", d)
 }
@@ -144,11 +147,15 @@ type CombinedCounterStat [][]CombinedCounter
 // NameStat represents stat for NameVector.
 type NameStat []Name
 
+// EmptyStat represents removed counter directory
+type EmptyStat string
+
 func (ScalarStat) isStat()          {}
 func (ErrorStat) isStat()           {}
 func (SimpleCounterStat) isStat()   {}
 func (CombinedCounterStat) isStat() {}
 func (NameStat) isStat()            {}
+func (EmptyStat) isStat()           {}
 
 func (s ScalarStat) IsZero() bool {
 	return s == 0
@@ -204,6 +211,9 @@ func (s NameStat) IsZero() bool {
 	}
 	return true
 }
+func (s EmptyStat) IsZero() bool {
+	return true
+}
 
 // ReduceSimpleCounterStatIndex returns reduced SimpleCounterStat s for index i.
 func ReduceSimpleCounterStatIndex(s SimpleCounterStat, i int) uint64 {
diff --git a/adapter/statsclient/statseg_v2.go b/adapter/statsclient/statseg_v2.go
index 68411f9..08467c1 100644
--- a/adapter/statsclient/statseg_v2.go
+++ b/adapter/statsclient/statseg_v2.go
@@ -202,6 +202,7 @@ func (ss *statSegmentV2) CopyEntryData(statSegDir unsafe.Pointer) adapter.Stat {
 		return adapter.NameStat(data)
 
 	case statDirEmpty:
+		return adapter.EmptyStat("<none>")
 		// no-op
 
 	default:
-- 
cgit 1.2.3-korg