[FIXED] Extended Purge accounting was not updating account usage.

server/filestore.go

@@ -1,4 +1,4 @@
-// Copyright 2019-2022 The NATS Authors
+// Copyright 2019-2023 The NATS Authors
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -4663,6 +4663,7 @@ func (fs *fileStore) PurgeEx(subject string, sequence, keep uint64) (purged uint
 
 	eq, wc := compareFn(subject), subjectHasWildcard(subject)
 	var firstSeqNeedsUpdate bool
+	var bytes uint64
 
 	// If we have a "keep" designation need to get full filtered state so we know how many to purge.
 	var maxp uint64
@@ -4712,6 +4713,7 @@ func (fs *fileStore) PurgeEx(subject string, sequence, keep uint64) (purged uint
 					mb.msgs--
 					mb.bytes -= rl
 					purged++
+					bytes += rl
 				}
 				// FSS updates.
 				mb.removeSeqPerSubject(sm.subj, seq, &smv)
@@ -4759,7 +4761,13 @@ func (fs *fileStore) PurgeEx(subject string, sequence, keep uint64) (purged uint
 		fs.selectNextFirst()
 	}
 
+	cb := fs.scb
 	fs.mu.Unlock()
+
+	if cb != nil {
+		cb(-int64(purged), -int64(bytes), 0, _EMPTY_)
+	}
+
 	return purged, nil
 }
 

server/jetstream_test.go

@@ -1,4 +1,4 @@
-// Copyright 2019-2022 The NATS Authors
+// Copyright 2019-2023 The NATS Authors
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -19425,3 +19425,64 @@ func TestJetStreamConsumerFilterUpdate(t *testing.T) {
 	// and expect that numFilter reports correctly.
 	checkNumFilter(0)
 }
+
+func TestJetStreamPurgeExAndAccounting(t *testing.T) {
+	cases := []struct {
+		name string
+		cfg  *nats.StreamConfig
+	}{
+		{name: "MemoryStore",
+			cfg: &nats.StreamConfig{
+				Name:     "TEST",
+				Storage:  nats.MemoryStorage,
+				Subjects: []string{"*"},
+			}},
+		{name: "FileStore",
+			cfg: &nats.StreamConfig{
+				Name:     "TEST",
+				Storage:  nats.FileStorage,
+				Subjects: []string{"*"},
+			}},
+	}
+	for _, c := range cases {
+		s := RunBasicJetStreamServer(t)
+		defer s.Shutdown()
+
+		// Client for API requests.
+		nc, js := jsClientConnect(t, s)
+		defer nc.Close()
+
+		_, err := js.AddStream(c.cfg)
+		require_NoError(t, err)
+
+		msg := []byte("accounting")
+		for i := 0; i < 100; i++ {
+			_, err = js.Publish("foo", msg)
+			require_NoError(t, err)
+			_, err = js.Publish("bar", msg)
+			require_NoError(t, err)
+		}
+
+		info, err := js.AccountInfo()
+		require_NoError(t, err)
+
+		err = js.PurgeStream("TEST", &nats.StreamPurgeRequest{Subject: "foo"})
+		require_NoError(t, err)
+
+		ninfo, err := js.AccountInfo()
+		require_NoError(t, err)
+
+		// Make sure we did the proper accounting.
+		if c.cfg.Storage == nats.MemoryStorage {
+			if ninfo.Memory != info.Memory/2 {
+				t.Fatalf("Accounting information incorrect for Memory: %d vs %d",
+					ninfo.Memory, info.Memory/2)
+			}
+		} else {
+			if ninfo.Store != info.Store/2 {
+				t.Fatalf("Accounting information incorrect for FileStore: %d vs %d",
+					ninfo.Store, info.Store/2)
+			}
+		}
+	}
+}