Fix possible index out of range parsing errors

treydock · Mar 31, 2021 · 2c172e0 · 2c172e0
1 parent 92900c8
commit 2c172e0
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Showing 2 changed files with 37 additions and 0 deletions.
diff --git a/collectors/mmdf.go b/collectors/mmdf.go
@@ -229,6 +229,14 @@ func parse_mmdf(out string, logger log.Logger) DFMetric {
  ps := reflect.ValueOf(&dfMetrics) // pointer to struct - addressable
  s := ps.Elem() // struct
  for k, vals := range headers {
+ if _, ok := values[k]; !ok {
+ level.Error(logger).Log("msg", "Header section missing from values", "header", k)
+ continue
+ }
+ if len(vals) != len(values[k]) {
+ level.Error(logger).Log("msg", "Length of headers does not equal length of values", "header", k, "values", len(values[k]), "headers", len(vals))
+ continue
+ }
  for i, v := range vals {
  mapKey := fmt.Sprintf("%s:%s", k, v)
  value := values[k][i]

diff --git a/collectors/mmdf_test.go b/collectors/mmdf_test.go
@@ -41,6 +41,20 @@ mmdf:data:0:1:::3647786188800:475190722560:13:12059515296:0:
 mmdf:metadata:0:1:::13891534848:6011299328:43:58139768:0:
 mmdf:fsTotal:0:1:::3661677723648:481202021888:14:12117655064:0:
 mmdf:inode:0:1:::430741822:484301506:915043328:1332164000:
+`
+ mmdfStdoutErr = `
+mmdf:nsd:HEADER:version:reserved:reserved:nsdName:storagePool:diskSize:failureGroup:metadata:data:freeBlocks:freeBlocksPct:freeFragments:freeFragmentsPct:diskAvailableForAlloc:
+mmdf:poolTotal:HEADER:version:reserved:reserved:poolName:poolSize:freeBlocks:freeBlocksPct:freeFragments:freeFragmentsPct:maxDiskSize:
+mmdf:data:HEADER:version:reserved:reserved:totalData:freeBlocks:freeBlocksPct:freeFragments:freeFragmentsPct:
+mmdf:metadata:HEADER:version:reserved:reserved:totalMetadata:freeBlocks:freeBlocksPct:freeFragments:freeFragmentsPct:
+mmdf:fsTotal:HEADER:version:reserved:reserved:fsSize:freeBlocks:freeBlocksPct:freeFragments:freeFragmentsPct:
+mmdf:inode:HEADER:version:reserved:reserved:usedInodes:freeInodes:allocatedInodes:maxInodes:
+mmdf:nsd:0:1:::P_META_VD102:system:771751936:300:Yes:No:320274944:41:5005384:1::
+mmdf:nsd:0:1:::P_DATA_VD02:data:46766489600:200:No:Yes:6092915712:13:154966272:0::
+mmdf:poolTotal:0:1:::data:3647786188800:475190722560:13:12059515296:0:3860104580096:
+mmdf:data:0:1:::3647786188800:475190722560:13:12059515296:0:
+mmdf:fsTotal:0:1:::3661677723648:481202021888:14:12117655064:
+mmdf:inode:0:1:::430741822:484301506:915043328:1332164000:
 `
 )
 
@@ -105,6 +119,21 @@ func TestParseMmdf(t *testing.T) {
  }
 }
 
+func TestParseMmdfErrors(t *testing.T) {
+ dfmetrics := parse_mmdf(mmdfStdoutErr, log.NewNopLogger())
+ if dfmetrics.InodesFree != 484301506 {
+ t.Errorf("Unexpected value for InodesFree, got %v", dfmetrics.InodesFree)
+ }
+ // Was skipped due to invalid length
+ if dfmetrics.FSTotal != 0 {
+ t.Errorf("Unexpected value for FSTotal, got %v", dfmetrics.FSTotal)
+ }
+ // Was skipped due to missing values
+ if dfmetrics.MetadataTotal != 0 {
+ t.Errorf("Unexpected value for MetadataTotal, got %v", dfmetrics.MetadataTotal)
+ }
+}
+
 func TestMmdfCollector(t *testing.T) {
  if _, err := kingpin.CommandLine.Parse([]string{}); err != nil {
  t.Fatal(err)