Added DebugReverseLookup() method to reverse-lookup directory and entry name

for a given vnode (for debugging purposes).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35625 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/kernel/fs/EntryCache.cpp

@@ -204,6 +204,22 @@ EntryCache::Lookup(ino_t dirID, const char* name, ino_t& _nodeID)
 }
 
 
+const char*
+EntryCache::DebugReverseLookup(ino_t nodeID, ino_t& _dirID)
+{
+	for (EntryTable::Iterator it = fEntries.GetIterator();
+			EntryCacheEntry* entry = it.Next();) {
+		if (nodeID == entry->node_id && strcmp(entry->name, ".") != 0
+				&& strcmp(entry->name, "..") != 0) {
+			_dirID = entry->dir_id;
+			return entry->name;
+		}
+	}
+
+	return NULL;
+}
+
+
 void
 EntryCache::_AddEntryToCurrentGeneration(EntryCacheEntry* entry)
 {

src/system/kernel/fs/EntryCache.h

@@ -94,6 +94,8 @@ public:
 			bool				Lookup(ino_t dirID, const char* name,
 									ino_t& nodeID);
 
+			const char*			DebugReverseLookup(ino_t nodeID, ino_t& _dirID);
+
 private:
 	static	const int32			kGenerationCount = 8;