DB quota

content/browser/renderer_host/database_message_filter.cc

 // Copyright (c) 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 "content/browser/renderer_host/database_message_filter.h"
 
 #include <string>
 
 #include "base/string_util.h"
 #include "base/threading/thread.h"
 #include "content/browser/user_metrics.h"
 #include "content/common/database_messages.h"
 #include "content/common/result_codes.h"
 #include "googleurl/src/gurl.h"
 #include "third_party/sqlite/sqlite3.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
 #include "webkit/database/database_util.h"
 #include "webkit/database/vfs_backend.h"
+#include "webkit/quota/quota_manager.h"
 
 #if defined(OS_POSIX)
 #include "base/file_descriptor_posix.h"
 #endif
 
+using quota::QuotaManager;
+using quota::QuotaManagerProxy;
+using quota::QuotaStatusCode;
 using WebKit::WebSecurityOrigin;
 using webkit_database::DatabaseTracker;
 using webkit_database::DatabaseUtil;
 using webkit_database::VfsBackend;
 
+namespace {
+
+class MyGetUsageAndQuotaCallback
+    : public QuotaManager::GetUsageAndQuotaCallback  {
+ public:
+  MyGetUsageAndQuotaCallback(
+      DatabaseMessageFilter* filter, IPC::Message* reply_msg)
+      : reply_msg_(reply_msg) {}
+
+  virtual void RunWithParams(
+        const Tuple3<QuotaStatusCode, int64, int64>& params) {
+    // Params are <status, usage, quota>
+    int64 available = 0;
+    if ((params.a == quota::kQuotaStatusOk) && (params.b < params.c))
+      available = params.c - params.b;
+    DatabaseHostMsg_GetSpaceAvailable::WriteReplyParams(
+        reply_msg_.get(), available);
+    filter_->Send(reply_msg_.release());
+  }
+
+ private:
+  scoped_refptr<DatabaseMessageFilter> filter_;
+  scoped_ptr<IPC::Message> reply_msg_;
+};
+
 const int kNumDeleteRetries = 2;
 const int kDelayDeleteRetryMs = 100;
 
+}  // namespace
+
 DatabaseMessageFilter::DatabaseMessageFilter(
     webkit_database::DatabaseTracker* db_tracker)
     : db_tracker_(db_tracker),
       observer_added_(false) {
   DCHECK(db_tracker_);
 }
 
 void DatabaseMessageFilter::OnChannelClosing() {
   BrowserMessageFilter::OnChannelClosing();
   if (observer_added_) {
@@ skipping 16 matching lines @@
   // then we need to manually close those connections
   db_tracker_->CloseDatabases(database_connections_);
   database_connections_.RemoveAllConnections();
 
   db_tracker_->RemoveObserver(this);
 }
 
 void DatabaseMessageFilter::OverrideThreadForMessage(
     const IPC::Message& message,
     BrowserThread::ID* thread) {
-  if (IPC_MESSAGE_CLASS(message) == DatabaseMsgStart)
+  if (message.type() == DatabaseHostMsg_GetSpaceAvailable::ID)
+    *thread = BrowserThread::IO;
+  else if (IPC_MESSAGE_CLASS(message) == DatabaseMsgStart)
     *thread = BrowserThread::FILE;
 
-  if (message.type() == DatabaseHostMsg_OpenFile::ID && !observer_added_) {
+  if (message.type() == DatabaseHostMsg_Opened::ID && !observer_added_) {
     observer_added_ = true;
     BrowserThread::PostTask(
         BrowserThread::FILE, FROM_HERE,
         NewRunnableMethod(this, &DatabaseMessageFilter::AddObserver));
   }
 }
 
 bool DatabaseMessageFilter::OnMessageReceived(
     const IPC::Message& message,
     bool* message_was_ok) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP_EX(DatabaseMessageFilter, message, *message_was_ok)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(DatabaseHostMsg_OpenFile,
                                     OnDatabaseOpenFile)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(DatabaseHostMsg_DeleteFile,
                                     OnDatabaseDeleteFile)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(DatabaseHostMsg_GetFileAttributes,
                                     OnDatabaseGetFileAttributes)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(DatabaseHostMsg_GetFileSize,
                                     OnDatabaseGetFileSize)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(DatabaseHostMsg_GetSpaceAvailable,
+                                    OnDatabaseGetSpaceAvailable)
     IPC_MESSAGE_HANDLER(DatabaseHostMsg_Opened, OnDatabaseOpened)
     IPC_MESSAGE_HANDLER(DatabaseHostMsg_Modified, OnDatabaseModified)
     IPC_MESSAGE_HANDLER(DatabaseHostMsg_Closed, OnDatabaseClosed)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP_EX()
   return handled;
 }
 
 DatabaseMessageFilter::~DatabaseMessageFilter() {
 }
@@ skipping 111 matching lines @@
       DatabaseUtil::GetFullFilePathForVfsFile(db_tracker_, vfs_file_name);
   if (!db_file.empty())
     attributes = VfsBackend::GetFileAttributes(db_file);
 
   DatabaseHostMsg_GetFileAttributes::WriteReplyParams(
       reply_msg, attributes);
   Send(reply_msg);
 }
 
 void DatabaseMessageFilter::OnDatabaseGetFileSize(
-  const string16& vfs_file_name, IPC::Message* reply_msg) {
+    const string16& vfs_file_name, IPC::Message* reply_msg) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   int64 size = 0;
   FilePath db_file =
       DatabaseUtil::GetFullFilePathForVfsFile(db_tracker_, vfs_file_name);
   if (!db_file.empty())
     size = VfsBackend::GetFileSize(db_file);
 
   DatabaseHostMsg_GetFileSize::WriteReplyParams(reply_msg, size);
   Send(reply_msg);
 }
 
+void DatabaseMessageFilter::OnDatabaseGetSpaceAvailable(
+    const string16& origin_identifier, IPC::Message* reply_msg) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK(db_tracker_->quota_manager_proxy());
+
+  QuotaManager* quota_manager =
+      db_tracker_->quota_manager_proxy()->quota_manager();
+  if (!quota_manager) {
+    NOTREACHED();  // The system is shutting down, messages are unexpected.
+    DatabaseHostMsg_GetSpaceAvailable::WriteReplyParams(reply_msg, 0LL);
+    Send(reply_msg);
+    return;
+  }
+
+  // TODO(michaeln): Is there a different API that should be used for this?
+  quota_manager->GetUsageAndQuota(

[michaeln, 2011/05/19 07:03:34]

Hi Kinuko, my local build got into an odd state where GetUsageAndQuota() calls
for a particular origin never completed. I'm not sure how it entered this state,
but a 'task' was pending in the QM and not making progress. Subsequent calls to
this method just added the callback to the wedged task. Haven't been able to
repro it yet.

+      DatabaseUtil::GetOriginFromIdentifier(origin_identifier),
+      quota::kStorageTypeTemporary,
+      new MyGetUsageAndQuotaCallback(this, reply_msg));
+}
+
 void DatabaseMessageFilter::OnDatabaseOpened(const string16& origin_identifier,
                                              const string16& database_name,
                                              const string16& description,
                                              int64 estimated_size) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   int64 database_size = 0;
-  int64 space_available = 0;
+  int64 space_available_not_used = 0;
   database_connections_.AddConnection(origin_identifier, database_name);
   db_tracker_->DatabaseOpened(origin_identifier, database_name, description,
-                              estimated_size, &database_size, &space_available);
+                              estimated_size, &database_size,
+                              &space_available_not_used);
   Send(new DatabaseMsg_UpdateSize(origin_identifier, database_name,
-                                  database_size, space_available));
+                                  database_size));
 }
 
 void DatabaseMessageFilter::OnDatabaseModified(
     const string16& origin_identifier,
     const string16& database_name) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   if (!database_connections_.IsDatabaseOpened(
           origin_identifier, database_name)) {
     UserMetrics::RecordAction(UserMetricsAction("BadMessageTerminate_DBMF"));
     BadMessageReceived();
@@ skipping 14 matching lines @@
   }
 
   db_tracker_->DatabaseClosed(origin_identifier, database_name);
   database_connections_.RemoveConnection(origin_identifier, database_name);
 }
 
 void DatabaseMessageFilter::OnDatabaseSizeChanged(
     const string16& origin_identifier,
     const string16& database_name,
     int64 database_size,
-    int64 space_available) {
+    int64 space_available_not_used) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   if (database_connections_.IsOriginUsed(origin_identifier)) {
     Send(new DatabaseMsg_UpdateSize(origin_identifier, database_name,
-                                    database_size, space_available));
+                                    database_size));
   }
 }
 
 void DatabaseMessageFilter::OnDatabaseScheduledForDeletion(
     const string16& origin_identifier,
     const string16& database_name) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   Send(new DatabaseMsg_CloseImmediately(origin_identifier, database_name));
 }