First pass at adding http/backend cache to NetLog

net/disk_cache/sparse_control.cc

 // Copyright (c) 2009-2010 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 "net/disk_cache/sparse_control.h"
 
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
@@ skipping 205 matching lines @@
   offset_ = offset;
   user_buf_ = buf ? new net::DrainableIOBuffer(buf, buf_len) : NULL;
   buf_len_ = buf_len;
   user_callback_ = callback;
 
   result_ = 0;
   pending_ = false;
   finished_ = false;
   abort_ = false;
 
+  entry_->net_log().BeginEvent(net::NetLog::TYPE_SPARSE_CONTROL, NULL);
   DoChildrenIO();
 
   if (!pending_) {
     // Everything was done synchronously.
     operation_ = kNoOperation;
     user_buf_ = NULL;
     user_callback_ = NULL;
     return result_;
   }
 
@@ skipping 367 matching lines @@
   int rv = child_->WriteData(kSparseIndex, 0, buf, sizeof(child_data_),
                              NULL, false);
   if (rv != sizeof(child_data_))
     DLOG(ERROR) << "Failed to save child data";
   SetChildBit(true);
 }
 
 void SparseControl::DoChildrenIO() {
   while (DoChildIO()) continue;
 
-  if (pending_ && finished_)
-    DoUserCallback();
+  if (finished_) {
+    entry_->net_log().EndEvent(net::NetLog::TYPE_SPARSE_CONTROL, NULL);
+    if (pending_)
+      DoUserCallback();
+  }
 }
 
 bool SparseControl::DoChildIO() {
   finished_ = true;
   if (!buf_len_ || result_ < 0)
     return false;
 
   if (!OpenChild())
     return false;
 
   if (!VerifyRange())
     return false;
 
   // We have more work to do. Let's not trigger a callback to the caller.
   finished_ = false;
   net::CompletionCallback* callback = user_callback_ ? &child_callback_ : NULL;
 
   int rv = 0;
   switch (operation_) {
     case kReadOperation:
+      if (entry_->net_log().IsLoggingAllEvents()) {
+        entry_->net_log().BeginEvent(
+            net::NetLog::TYPE_SPARSE_CONTROL_READ,
+            new net::NetLogSourceParameter("source_dependency",
+                                           child_->net_log().source()));
+      }
       rv = child_->ReadDataImpl(kSparseData, child_offset_, user_buf_,
                                 child_len_, callback);
       break;
     case kWriteOperation:
+      if (entry_->net_log().IsLoggingAllEvents()) {
+        entry_->net_log().BeginEvent(
+            net::NetLog::TYPE_SPARSE_CONTROL_WRITE,
+            new net::NetLogSourceParameter("source_dependency",
+                                           child_->net_log().source()));
+      }
       rv = child_->WriteDataImpl(kSparseData, child_offset_, user_buf_,
                                  child_len_, callback, false);
       break;
     case kGetRangeOperation:
+      if (entry_->net_log().IsLoggingAllEvents()) {
+        entry_->net_log().BeginEvent(net::NetLog::TYPE_SPARSE_CONTROL_GET_RANGE,
+                                     NULL);
+      }
       rv = DoGetAvailableRange();
       break;
     default:
       NOTREACHED();
   }
 
   if (rv == net::ERR_IO_PENDING) {
     if (!pending_) {
       pending_ = true;
       // The child will protect himself against closing the entry while IO is in
@@ skipping 52 matching lines @@
   // Only update offset_ when this query found zeros at the start.
   if (empty_start)
     offset_ += empty_start;
 
   // This will actually break the loop.
   buf_len_ = 0;
   return 0;
 }
 
 void SparseControl::DoChildIOCompleted(int result) {
+  if (entry_->net_log().IsLoggingAllEvents()) {
+    net::NetLog::EventType event_type;
+    switch (operation_) {
+      case kReadOperation:
+        event_type = net::NetLog::TYPE_SPARSE_CONTROL_READ;
+        break;
+      case kWriteOperation:
+        event_type = net::NetLog::TYPE_SPARSE_CONTROL_WRITE;
+        break;
+      case kGetRangeOperation:
+        event_type = net::NetLog::TYPE_SPARSE_CONTROL_GET_RANGE;
+        break;
+      default:
+        NOTREACHED();
+    }
+    entry_->net_log().EndEventWithErrorCode(event_type, result);
+  }
   if (result < 0) {
     // We fail the whole operation if we encounter an error.
     result_ = result;
     return;
   }
 
   UpdateRange(result);
 
   result_ += result;
   offset_ += result;
   buf_len_ -= result;
 
   // We'll be reusing the user provided buffer for the next chunk.
   if (buf_len_ && user_buf_)
     user_buf_->DidConsume(result);
 }
 
 void SparseControl::OnChildIOCompleted(int result) {
   DCHECK_NE(net::ERR_IO_PENDING, result);
   DoChildIOCompleted(result);
 
   if (abort_) {
     // We'll return the current result of the operation, which may be less than
     // the bytes to read or write, but the user cancelled the operation.
     abort_ = false;
+    entry_->net_log().AddEvent(net::NetLog::TYPE_CANCELLED, NULL);
+    entry_->net_log().EndEvent(
+        net::NetLog::TYPE_SPARSE_CONTROL, NULL);
     DoUserCallback();
     return DoAbortCallbacks();
   }
 
   // We are running a callback from the message loop. It's time to restart what
   // we were doing before.
   DoChildrenIO();
 }
 
 void SparseControl::DoUserCallback() {
@@ skipping 14 matching lines @@
     net::CompletionCallback* c = abort_callbacks_[i];
     if (i == abort_callbacks_.size() - 1)
       abort_callbacks_.clear();
 
     entry_->Release();  // Don't touch object after this line.
     c->Run(net::OK);
   }
 }
 
 }  // namespace disk_cache