Make SubmountFileSystem resistant to inquiries for nonexistent nodes.

fcc0ed72 · Han-Wen Nienhuys · fe0d2505 · fcc0ed72
Commit fcc0ed72 authored Apr 11, 2011 by Han-Wen Nienhuys
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examplelib/stackfs.go examplelib/stackfs.go +5 -1

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--- a/examplelib/stackfs.go
+++ b/examplelib/stackfs.go
@@ -126,7 +126,11 @@ func (me *SubmountFileSystem) registerLookup(subInode uint64, subfs *subFsInfo)
 func (me *SubmountFileSystem) getSubFs(local uint64) (nodeid uint64, subfs *subFsInfo) {
 	me.nodeMapLock.RLock()
 	defer me.nodeMapLock.RUnlock()
-	data := me.nodeMap[local]
+	data, ok := me.nodeMap[local]
+	if !ok {
+		return 0, nil
+	}
+
 	return data.NodeId, data.SubFs
 }