Refine UMA stats for file system databases.

webkit/fileapi/file_system_directory_database.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/fileapi/file_system_directory_database.h"
 
 #include <math.h>
 
 #include "base/file_util.h"
 #include "base/location.h"
@@ skipping 56 matching lines @@
 const char kChildLookupPrefix[] = "CHILD_OF:";
 const char kChildLookupSeparator[] = ":";
 const char kLastFileIdKey[] = "LAST_FILE_ID";
 const char kLastIntegerKey[] = "LAST_INTEGER";
 const int64 kMinimumReportIntervalHours = 1;
 const char kInitStatusHistogramLabel[] = "FileSystem.DirectoryDatabaseInit";
 
 enum InitStatus {
   INIT_STATUS_OK = 0,
   INIT_STATUS_CORRUPTION,
+  INIT_STATUS_IO_ERROR,
+  INIT_STATUS_UNKNOWN_ERROR,
   INIT_STATUS_MAX
 };
 
 std::string GetChildLookupKey(
     fileapi::FileSystemDirectoryDatabase::FileId parent_id,
     const FilePath::StringType& child_name) {
   std::string name;
   name = fileapi::FilePathToString(FilePath(child_name));
   return std::string(kChildLookupPrefix) + base::Int64ToString(parent_id) +
       std::string(kChildLookupSeparator) + name;
@@ skipping 350 matching lines @@
   base::Time now = base::Time::Now();
   const base::TimeDelta minimum_interval =
       base::TimeDelta::FromHours(kMinimumReportIntervalHours);
   if (last_reported_time_ + minimum_interval >= now)
     return;
   last_reported_time_ = now;
 
   if (status.ok()) {
     UMA_HISTOGRAM_ENUMERATION(kInitStatusHistogramLabel,
                               INIT_STATUS_OK, INIT_STATUS_MAX);
+  } else if (status.IsCorruption()) {
+    UMA_HISTOGRAM_ENUMERATION(kInitStatusHistogramLabel,
+                              INIT_STATUS_CORRUPTION, INIT_STATUS_MAX);
+  } else if (status.IsIOError()) {
+    UMA_HISTOGRAM_ENUMERATION(kInitStatusHistogramLabel,
+                              INIT_STATUS_IO_ERROR, INIT_STATUS_MAX);
   } else {
     UMA_HISTOGRAM_ENUMERATION(kInitStatusHistogramLabel,
-                              INIT_STATUS_CORRUPTION, INIT_STATUS_MAX);
+                              INIT_STATUS_UNKNOWN_ERROR, INIT_STATUS_MAX);
   }
 }
 
 bool FileSystemDirectoryDatabase::StoreDefaultValues() {
   // Verify that this is a totally new database, and initialize it.
   scoped_ptr<leveldb::Iterator> iter(db_->NewIterator(leveldb::ReadOptions()));
   iter->SeekToFirst();
   if (iter->Valid()) {  // DB was not empty--we shouldn't have been called.
     LOG(ERROR) << "File system origin database is corrupt!";
     return false;
@@ skipping 100 matching lines @@
 
 void FileSystemDirectoryDatabase::HandleError(
     const tracked_objects::Location& from_here,
     const leveldb::Status& status) {
   LOG(ERROR) << "FileSystemDirectoryDatabase failed at: "
              << from_here.ToString() << " with error: " << status.ToString();
   db_.reset();
 }
 
 }  // namespace fileapi