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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "net/base/file_stream_metrics.h"
      6 
      7 #include "base/basictypes.h"
      8 #include "base/logging.h"
      9 #include "base/metrics/histogram.h"
     10 
     11 namespace net {
     12 
     13 namespace {
     14 
     15 const char* FileErrorSourceStrings[] = {
     16   "OPEN",
     17   "WRITE",
     18   "READ",
     19   "SEEK",
     20   "FLUSH",
     21   "SET_EOF",
     22   "GET_SIZE"
     23 };
     24 
     25 COMPILE_ASSERT(ARRAYSIZE_UNSAFE(FileErrorSourceStrings) ==
     26                    FILE_ERROR_SOURCE_COUNT,
     27                file_error_source_enum_has_changed);
     28 
     29 void RecordFileErrorTypeCount(FileErrorSource source) {
     30   UMA_HISTOGRAM_ENUMERATION(
     31       "Net.FileErrorType_Counts", source, FILE_ERROR_SOURCE_COUNT);
     32 }
     33 
     34 }  // namespace
     35 
     36 void RecordFileError(int error, FileErrorSource source, bool record) {
     37   LOG(ERROR) << " " << __FUNCTION__ << "()"
     38              << " error = " << error
     39              << " source = " << source
     40              << " record = " << record;
     41 
     42   if (!record)
     43     return;
     44 
     45   RecordFileErrorTypeCount(source);
     46 
     47   int bucket = GetFileErrorUmaBucket(error);
     48 
     49   // Fixed values per platform.
     50   static const int max_bucket = MaxFileErrorUmaBucket();
     51   static const int max_error = MaxFileErrorUmaValue();
     52 
     53   switch(source) {
     54     case FILE_ERROR_SOURCE_OPEN:
     55       UMA_HISTOGRAM_ENUMERATION("Net.FileError_Open", error, max_error);
     56       UMA_HISTOGRAM_ENUMERATION("Net.FileErrorRange_Open", bucket, max_bucket);
     57       break;
     58 
     59     case FILE_ERROR_SOURCE_WRITE:
     60       UMA_HISTOGRAM_ENUMERATION("Net.FileError_Write", error, max_error);
     61       UMA_HISTOGRAM_ENUMERATION("Net.FileErrorRange_Write", bucket, max_bucket);
     62       break;
     63 
     64     case FILE_ERROR_SOURCE_READ:
     65       UMA_HISTOGRAM_ENUMERATION("Net.FileError_Read", error, max_error);
     66       UMA_HISTOGRAM_ENUMERATION("Net.FileErrorRange_Read", bucket, max_bucket);
     67       break;
     68 
     69     case FILE_ERROR_SOURCE_SEEK:
     70       UMA_HISTOGRAM_ENUMERATION("Net.FileError_Seek", error, max_error);
     71       UMA_HISTOGRAM_ENUMERATION("Net.FileErrorRange_Seek", bucket, max_bucket);
     72       break;
     73 
     74     case FILE_ERROR_SOURCE_FLUSH:
     75       UMA_HISTOGRAM_ENUMERATION("Net.FileError_Flush", error, max_error);
     76       UMA_HISTOGRAM_ENUMERATION("Net.FileErrorRange_Flush", bucket, max_bucket);
     77       break;
     78 
     79     case FILE_ERROR_SOURCE_SET_EOF:
     80       UMA_HISTOGRAM_ENUMERATION("Net.FileError_SetEof", error, max_error);
     81       UMA_HISTOGRAM_ENUMERATION("Net.FileErrorRange_SetEof", bucket,
     82                                 max_bucket);
     83       break;
     84 
     85     case FILE_ERROR_SOURCE_GET_SIZE:
     86       UMA_HISTOGRAM_ENUMERATION("Net.FileError_GetSize", error, max_error);
     87       UMA_HISTOGRAM_ENUMERATION("Net.FileErrorRange_GetSize", bucket,
     88                                 max_bucket);
     89       break;
     90 
     91     default:
     92       break;
     93   }
     94 }
     95 
     96 const char* GetFileErrorSourceName(FileErrorSource source) {
     97   DCHECK_NE(FILE_ERROR_SOURCE_COUNT, source);
     98   return FileErrorSourceStrings[source];
     99 }
    100 
    101 }  // namespace net
    102