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1392 lines (1140 loc) · 48.4 KB
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/*
* Copyright (C) 2007, 2008, 2012, 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "DatabaseTracker.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "Database.h"
#include "DatabaseContext.h"
#include "DatabaseManager.h"
#include "DatabaseManagerClient.h"
#include "DatabaseThread.h"
#include "FileSystem.h"
#include "Logging.h"
#include "OriginLock.h"
#include "Page.h"
#include "SecurityOrigin.h"
#include "SecurityOriginHash.h"
#include "SQLiteFileSystem.h"
#include "SQLiteStatement.h"
#include "UUID.h"
#include <wtf/MainThread.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/CString.h>
#include <wtf/text/StringBuilder.h>
#if PLATFORM(IOS)
#include "WebCoreThread.h"
#endif
namespace WebCore {
std::unique_ptr<DatabaseTracker> DatabaseTracker::trackerWithDatabasePath(const String& databasePath)
{
return std::unique_ptr<DatabaseTracker>(new DatabaseTracker(databasePath));
}
static DatabaseTracker* staticTracker = nullptr;
void DatabaseTracker::initializeTracker(const String& databasePath)
{
ASSERT(!staticTracker);
if (staticTracker)
return;
staticTracker = new DatabaseTracker(databasePath);
}
DatabaseTracker& DatabaseTracker::tracker()
{
if (!staticTracker)
staticTracker = new DatabaseTracker("");
return *staticTracker;
}
DatabaseTracker::DatabaseTracker(const String& databasePath)
: m_client(nullptr)
{
setDatabaseDirectoryPath(databasePath);
}
void DatabaseTracker::setDatabaseDirectoryPath(const String& path)
{
LockHolder lockDatabase(m_databaseGuard);
ASSERT(!m_database.isOpen());
m_databaseDirectoryPath = path.isolatedCopy();
}
String DatabaseTracker::databaseDirectoryPath() const
{
return m_databaseDirectoryPath.isolatedCopy();
}
String DatabaseTracker::trackerDatabasePath() const
{
return SQLiteFileSystem::appendDatabaseFileNameToPath(m_databaseDirectoryPath.isolatedCopy(), "Databases.db");
}
void DatabaseTracker::openTrackerDatabase(TrackerCreationAction createAction)
{
ASSERT(!m_databaseGuard.tryLock());
if (m_database.isOpen())
return;
// If createIfDoesNotExist is false, SQLiteFileSystem::ensureDatabaseFileExists()
// will return false if the database file does not exist.
// If createIfDoesNotExist is true, SQLiteFileSystem::ensureDatabaseFileExists()
// will attempt to create the path to the database file if it does not
// exists yet. It'll return true if the path already exists, or if it
// successfully creates the path. Else, it will return false.
String databasePath = trackerDatabasePath();
if (!SQLiteFileSystem::ensureDatabaseFileExists(databasePath, createAction == CreateIfDoesNotExist))
return;
if (!m_database.open(databasePath)) {
// FIXME: What do do here?
LOG_ERROR("Failed to open databasePath %s.", databasePath.ascii().data());
return;
}
m_database.disableThreadingChecks();
if (!m_database.tableExists("Origins")) {
if (!m_database.executeCommand("CREATE TABLE Origins (origin TEXT UNIQUE ON CONFLICT REPLACE, quota INTEGER NOT NULL ON CONFLICT FAIL);")) {
// FIXME: and here
LOG_ERROR("Failed to create Origins table");
}
}
if (!m_database.tableExists("Databases")) {
if (!m_database.executeCommand("CREATE TABLE Databases (guid INTEGER PRIMARY KEY AUTOINCREMENT, origin TEXT, name TEXT, displayName TEXT, estimatedSize INTEGER, path TEXT);")) {
// FIXME: and here
LOG_ERROR("Failed to create Databases table");
}
}
}
bool DatabaseTracker::hasAdequateQuotaForOrigin(SecurityOrigin* origin, unsigned long estimatedSize, DatabaseError& err)
{
ASSERT(!m_databaseGuard.tryLock());
unsigned long long usage = usageForOrigin(origin);
// If the database will fit, allow its creation.
unsigned long long requirement = usage + std::max<unsigned long long>(1, estimatedSize);
if (requirement < usage) {
// The estimated size is so big it causes an overflow; don't allow creation.
err = DatabaseError::DatabaseSizeOverflowed;
return false;
}
if (requirement <= quotaForOriginNoLock(origin))
return true;
err = DatabaseError::DatabaseSizeExceededQuota;
return false;
}
bool DatabaseTracker::canEstablishDatabase(DatabaseContext* context, const String& name, unsigned long estimatedSize, DatabaseError& error)
{
error = DatabaseError::None;
LockHolder lockDatabase(m_databaseGuard);
SecurityOrigin* origin = context->securityOrigin();
if (isDeletingDatabaseOrOriginFor(origin, name)) {
error = DatabaseError::DatabaseIsBeingDeleted;
return false;
}
recordCreatingDatabase(origin, name);
// If a database already exists, ignore the passed-in estimated size and say it's OK.
if (hasEntryForDatabase(origin, name))
return true;
if (hasAdequateQuotaForOrigin(origin, estimatedSize, error)) {
ASSERT(error == DatabaseError::None);
return true;
}
// If we get here, then we do not have enough quota for one of the
// following reasons as indicated by the set error:
//
// If the error is DatabaseSizeOverflowed, then this means the requested
// estimatedSize if so unreasonably large that it can cause an overflow in
// the usage budget computation. In that case, there's nothing more we can
// do, and there's no need for a retry. Hence, we should indicate that
// we're done with our attempt to create the database.
//
// If the error is DatabaseSizeExceededQuota, then we'll give the client
// a chance to update the quota and call retryCanEstablishDatabase() to try
// again. Hence, we don't call doneCreatingDatabase() yet in that case.
if (error == DatabaseError::DatabaseSizeOverflowed)
doneCreatingDatabase(origin, name);
else
ASSERT(error == DatabaseError::DatabaseSizeExceededQuota);
return false;
}
// Note: a thought about performance: hasAdequateQuotaForOrigin() was also
// called in canEstablishDatabase(), and hence, we're repeating some work within
// hasAdequateQuotaForOrigin(). However, retryCanEstablishDatabase() should only
// be called in the rare even if canEstablishDatabase() fails. Since it is rare,
// we should not bother optimizing it. It is more beneficial to keep
// hasAdequateQuotaForOrigin() simple and correct (i.e. bug free), and just
// re-use it. Also note that the path for opening a database involves IO, and
// hence should not be a performance critical path anyway.
bool DatabaseTracker::retryCanEstablishDatabase(DatabaseContext* context, const String& name, unsigned long estimatedSize, DatabaseError& error)
{
error = DatabaseError::None;
LockHolder lockDatabase(m_databaseGuard);
SecurityOrigin* origin = context->securityOrigin();
// We have already eliminated other types of errors in canEstablishDatabase().
// The only reason we're in retryCanEstablishDatabase() is because we gave
// the client a chance to update the quota and are rechecking it here.
// If we fail this check, the only possible reason this time should be due
// to inadequate quota.
if (hasAdequateQuotaForOrigin(origin, estimatedSize, error)) {
ASSERT(error == DatabaseError::None);
return true;
}
ASSERT(error == DatabaseError::DatabaseSizeExceededQuota);
doneCreatingDatabase(origin, name);
return false;
}
bool DatabaseTracker::hasEntryForOriginNoLock(SecurityOrigin* origin)
{
ASSERT(!m_databaseGuard.tryLock());
openTrackerDatabase(DontCreateIfDoesNotExist);
if (!m_database.isOpen())
return false;
SQLiteStatement statement(m_database, "SELECT origin FROM Origins where origin=?;");
if (statement.prepare() != SQLITE_OK) {
LOG_ERROR("Failed to prepare statement.");
return false;
}
statement.bindText(1, origin->databaseIdentifier());
return statement.step() == SQLITE_ROW;
}
bool DatabaseTracker::hasEntryForOrigin(SecurityOrigin* origin)
{
LockHolder lockDatabase(m_databaseGuard);
return hasEntryForOriginNoLock(origin);
}
bool DatabaseTracker::hasEntryForDatabase(SecurityOrigin* origin, const String& databaseIdentifier)
{
ASSERT(!m_databaseGuard.tryLock());
openTrackerDatabase(DontCreateIfDoesNotExist);
if (!m_database.isOpen()) {
// No "tracker database". Hence, no entry for the database of interest.
return false;
}
// We've got a tracker database. Set up a query to ask for the db of interest:
SQLiteStatement statement(m_database, "SELECT guid FROM Databases WHERE origin=? AND name=?;");
if (statement.prepare() != SQLITE_OK)
return false;
statement.bindText(1, origin->databaseIdentifier());
statement.bindText(2, databaseIdentifier);
return statement.step() == SQLITE_ROW;
}
unsigned long long DatabaseTracker::getMaxSizeForDatabase(const Database* database)
{
// The maximum size for a database is the full quota for its origin, minus the current usage within the origin,
// plus the current usage of the given database
LockHolder lockDatabase(m_databaseGuard);
SecurityOrigin* origin = database->securityOrigin();
unsigned long long quota = quotaForOriginNoLock(origin);
unsigned long long diskUsage = usageForOrigin(origin);
unsigned long long databaseFileSize = SQLiteFileSystem::getDatabaseFileSize(database->fileName());
ASSERT(databaseFileSize <= diskUsage);
if (diskUsage > quota)
return databaseFileSize;
// A previous error may have allowed the origin to exceed its quota, or may
// have allowed this database to exceed our cached estimate of the origin
// disk usage. Don't multiply that error through integer underflow, or the
// effective quota will permanently become 2^64.
unsigned long long maxSize = quota - diskUsage + databaseFileSize;
if (maxSize > quota)
maxSize = databaseFileSize;
return maxSize;
}
void DatabaseTracker::closeAllDatabases()
{
Vector<Ref<Database>> openDatabases;
{
LockHolder openDatabaseMapLock(m_openDatabaseMapGuard);
if (!m_openDatabaseMap)
return;
for (auto& nameMap : m_openDatabaseMap->values()) {
for (auto& set : nameMap->values()) {
for (auto& database : *set)
openDatabases.append(*database);
}
}
}
for (auto& database : openDatabases)
database->close();
}
String DatabaseTracker::originPath(SecurityOrigin* origin) const
{
return SQLiteFileSystem::appendDatabaseFileNameToPath(m_databaseDirectoryPath.isolatedCopy(), origin->databaseIdentifier());
}
static String generateDatabaseFileName()
{
StringBuilder stringBuilder;
stringBuilder.append(createCanonicalUUIDString());
stringBuilder.appendLiteral(".db");
return stringBuilder.toString();
}
String DatabaseTracker::fullPathForDatabaseNoLock(SecurityOrigin* origin, const String& name, bool createIfNotExists)
{
ASSERT(!m_databaseGuard.tryLock());
String originIdentifier = origin->databaseIdentifier();
String originPath = this->originPath(origin);
// Make sure the path for this SecurityOrigin exists
if (createIfNotExists && !SQLiteFileSystem::ensureDatabaseDirectoryExists(originPath))
return String();
// See if we have a path for this database yet
if (!m_database.isOpen())
return String();
SQLiteStatement statement(m_database, "SELECT path FROM Databases WHERE origin=? AND name=?;");
if (statement.prepare() != SQLITE_OK)
return String();
statement.bindText(1, originIdentifier);
statement.bindText(2, name);
int result = statement.step();
if (result == SQLITE_ROW)
return SQLiteFileSystem::appendDatabaseFileNameToPath(originPath, statement.getColumnText(0));
if (!createIfNotExists)
return String();
if (result != SQLITE_DONE) {
LOG_ERROR("Failed to retrieve filename from Database Tracker for origin %s, name %s", originIdentifier.ascii().data(), name.ascii().data());
return String();
}
statement.finalize();
String fileName = generateDatabaseFileName();
if (!addDatabase(origin, name, fileName))
return String();
// If this origin's quota is being tracked (open handle to a database in this origin), add this new database
// to the quota manager now
String fullFilePath = SQLiteFileSystem::appendDatabaseFileNameToPath(originPath, fileName);
return fullFilePath;
}
String DatabaseTracker::fullPathForDatabase(SecurityOrigin* origin, const String& name, bool createIfNotExists)
{
LockHolder lockDatabase(m_databaseGuard);
return fullPathForDatabaseNoLock(origin, name, createIfNotExists).isolatedCopy();
}
void DatabaseTracker::origins(Vector<RefPtr<SecurityOrigin>>& originsResult)
{
LockHolder lockDatabase(m_databaseGuard);
openTrackerDatabase(DontCreateIfDoesNotExist);
if (!m_database.isOpen())
return;
SQLiteStatement statement(m_database, "SELECT origin FROM Origins");
if (statement.prepare() != SQLITE_OK) {
LOG_ERROR("Failed to prepare statement.");
return;
}
int result;
while ((result = statement.step()) == SQLITE_ROW) {
RefPtr<SecurityOrigin> origin = SecurityOrigin::createFromDatabaseIdentifier(statement.getColumnText(0));
originsResult.append(origin->isolatedCopy());
}
originsResult.shrinkToFit();
if (result != SQLITE_DONE)
LOG_ERROR("Failed to read in all origins from the database.");
}
bool DatabaseTracker::databaseNamesForOriginNoLock(SecurityOrigin* origin, Vector<String>& resultVector)
{
ASSERT(!m_databaseGuard.tryLock());
openTrackerDatabase(DontCreateIfDoesNotExist);
if (!m_database.isOpen())
return false;
SQLiteStatement statement(m_database, "SELECT name FROM Databases where origin=?;");
if (statement.prepare() != SQLITE_OK)
return false;
statement.bindText(1, origin->databaseIdentifier());
int result;
while ((result = statement.step()) == SQLITE_ROW)
resultVector.append(statement.getColumnText(0));
if (result != SQLITE_DONE) {
LOG_ERROR("Failed to retrieve all database names for origin %s", origin->databaseIdentifier().ascii().data());
return false;
}
return true;
}
bool DatabaseTracker::databaseNamesForOrigin(SecurityOrigin* origin, Vector<String>& resultVector)
{
Vector<String> temp;
{
LockHolder lockDatabase(m_databaseGuard);
if (!databaseNamesForOriginNoLock(origin, temp))
return false;
}
for (auto& databaseName : temp)
resultVector.append(databaseName.isolatedCopy());
return true;
}
DatabaseDetails DatabaseTracker::detailsForNameAndOrigin(const String& name, SecurityOrigin* origin)
{
String originIdentifier = origin->databaseIdentifier();
String displayName;
int64_t expectedUsage;
{
LockHolder lockDatabase(m_databaseGuard);
openTrackerDatabase(DontCreateIfDoesNotExist);
if (!m_database.isOpen())
return DatabaseDetails();
SQLiteStatement statement(m_database, "SELECT displayName, estimatedSize FROM Databases WHERE origin=? AND name=?");
if (statement.prepare() != SQLITE_OK)
return DatabaseDetails();
statement.bindText(1, originIdentifier);
statement.bindText(2, name);
int result = statement.step();
if (result == SQLITE_DONE)
return DatabaseDetails();
if (result != SQLITE_ROW) {
LOG_ERROR("Error retrieving details for database %s in origin %s from tracker database", name.ascii().data(), originIdentifier.ascii().data());
return DatabaseDetails();
}
displayName = statement.getColumnText(0);
expectedUsage = statement.getColumnInt64(1);
}
String path = fullPathForDatabase(origin, name, false);
if (path.isEmpty())
return DatabaseDetails(name, displayName, expectedUsage, 0, 0, 0);
return DatabaseDetails(name, displayName, expectedUsage, SQLiteFileSystem::getDatabaseFileSize(path), SQLiteFileSystem::databaseCreationTime(path), SQLiteFileSystem::databaseModificationTime(path));
}
void DatabaseTracker::setDatabaseDetails(SecurityOrigin* origin, const String& name, const String& displayName, unsigned long estimatedSize)
{
String originIdentifier = origin->databaseIdentifier();
int64_t guid = 0;
LockHolder lockDatabase(m_databaseGuard);
openTrackerDatabase(CreateIfDoesNotExist);
if (!m_database.isOpen())
return;
SQLiteStatement statement(m_database, "SELECT guid FROM Databases WHERE origin=? AND name=?");
if (statement.prepare() != SQLITE_OK)
return;
statement.bindText(1, originIdentifier);
statement.bindText(2, name);
int result = statement.step();
if (result == SQLITE_ROW)
guid = statement.getColumnInt64(0);
statement.finalize();
if (guid == 0) {
if (result != SQLITE_DONE)
LOG_ERROR("Error to determing existence of database %s in origin %s in tracker database", name.ascii().data(), originIdentifier.ascii().data());
else {
// This case should never occur - we should never be setting database details for a database that doesn't already exist in the tracker
// But since the tracker file is an external resource not under complete control of our code, it's somewhat invalid to make this an ASSERT case
// So we'll print an error instead
LOG_ERROR("Could not retrieve guid for database %s in origin %s from the tracker database - it is invalid to set database details on a database that doesn't already exist in the tracker",
name.ascii().data(), originIdentifier.ascii().data());
}
return;
}
SQLiteStatement updateStatement(m_database, "UPDATE Databases SET displayName=?, estimatedSize=? WHERE guid=?");
if (updateStatement.prepare() != SQLITE_OK)
return;
updateStatement.bindText(1, displayName);
updateStatement.bindInt64(2, estimatedSize);
updateStatement.bindInt64(3, guid);
if (updateStatement.step() != SQLITE_DONE) {
LOG_ERROR("Failed to update details for database %s in origin %s", name.ascii().data(), originIdentifier.ascii().data());
return;
}
if (m_client)
m_client->dispatchDidModifyDatabase(origin, name);
}
void DatabaseTracker::doneCreatingDatabase(Database* database)
{
LockHolder lockDatabase(m_databaseGuard);
doneCreatingDatabase(database->securityOrigin(), database->stringIdentifier());
}
void DatabaseTracker::addOpenDatabase(Database* database)
{
if (!database)
return;
{
LockHolder openDatabaseMapLock(m_openDatabaseMapGuard);
if (!m_openDatabaseMap)
m_openDatabaseMap = std::make_unique<DatabaseOriginMap>();
String name(database->stringIdentifier());
DatabaseNameMap* nameMap = m_openDatabaseMap->get(database->securityOrigin());
if (!nameMap) {
nameMap = new DatabaseNameMap;
m_openDatabaseMap->set(database->securityOrigin()->isolatedCopy(), nameMap);
}
DatabaseSet* databaseSet = nameMap->get(name);
if (!databaseSet) {
databaseSet = new DatabaseSet;
nameMap->set(name.isolatedCopy(), databaseSet);
}
databaseSet->add(database);
LOG(StorageAPI, "Added open Database %s (%p)\n", database->stringIdentifier().ascii().data(), database);
}
}
void DatabaseTracker::removeOpenDatabase(Database* database)
{
if (!database)
return;
{
LockHolder openDatabaseMapLock(m_openDatabaseMapGuard);
if (!m_openDatabaseMap) {
ASSERT_NOT_REACHED();
return;
}
String name(database->stringIdentifier());
DatabaseNameMap* nameMap = m_openDatabaseMap->get(database->securityOrigin());
if (!nameMap) {
ASSERT_NOT_REACHED();
return;
}
DatabaseSet* databaseSet = nameMap->get(name);
if (!databaseSet) {
ASSERT_NOT_REACHED();
return;
}
databaseSet->remove(database);
LOG(StorageAPI, "Removed open Database %s (%p)\n", database->stringIdentifier().ascii().data(), database);
if (!databaseSet->isEmpty())
return;
nameMap->remove(name);
delete databaseSet;
if (!nameMap->isEmpty())
return;
m_openDatabaseMap->remove(database->securityOrigin());
delete nameMap;
}
}
void DatabaseTracker::getOpenDatabases(SecurityOrigin* origin, const String& name, HashSet<RefPtr<Database>>* databases)
{
LockHolder openDatabaseMapLock(m_openDatabaseMapGuard);
if (!m_openDatabaseMap)
return;
DatabaseNameMap* nameMap = m_openDatabaseMap->get(origin);
if (!nameMap)
return;
DatabaseSet* databaseSet = nameMap->get(name);
if (!databaseSet)
return;
for (auto& database : *databaseSet)
databases->add(database);
}
RefPtr<OriginLock> DatabaseTracker::originLockFor(SecurityOrigin* origin)
{
LockHolder lockDatabase(m_databaseGuard);
String databaseIdentifier = origin->databaseIdentifier();
// The originLockMap is accessed from multiple DatabaseThreads since
// different script contexts can be writing to different databases from
// the same origin. Hence, the databaseIdentifier key needs to be an
// isolated copy. An isolated copy gives us a value whose refCounting is
// thread-safe, since our copy is guarded by the m_databaseGuard mutex.
databaseIdentifier = databaseIdentifier.isolatedCopy();
OriginLockMap::AddResult addResult =
m_originLockMap.add(databaseIdentifier, RefPtr<OriginLock>());
if (!addResult.isNewEntry)
return addResult.iterator->value;
String path = originPath(origin);
RefPtr<OriginLock> lock = adoptRef(*new OriginLock(path));
ASSERT(lock);
addResult.iterator->value = lock;
return lock;
}
void DatabaseTracker::deleteOriginLockFor(SecurityOrigin* origin)
{
ASSERT(!m_databaseGuard.tryLock());
// There is not always an instance of an OriginLock associated with an origin.
// For example, if the OriginLock lock file was created by a previous run of
// the browser which has now terminated, and the current browser process
// has not executed any database transactions from this origin that would
// have created the OriginLock instance in memory. In this case, we will have
// a lock file but not an OriginLock instance in memory.
// This function is only called if we are already deleting all the database
// files in this origin. We'll give the OriginLock one chance to do an
// orderly clean up first when we remove its ref from the m_originLockMap.
// This may or may not be possible depending on whether other threads are
// also using the OriginLock at the same time. After that, we will delete the lock file.
m_originLockMap.remove(origin->databaseIdentifier());
OriginLock::deleteLockFile(originPath(origin));
}
unsigned long long DatabaseTracker::usageForOrigin(SecurityOrigin* origin)
{
String originPath = this->originPath(origin);
unsigned long long diskUsage = 0;
for (auto& fileName : listDirectory(originPath, ASCIILiteral("*.db"))) {
long long size;
getFileSize(fileName, size);
diskUsage += size;
}
return diskUsage;
}
unsigned long long DatabaseTracker::quotaForOriginNoLock(SecurityOrigin* origin)
{
ASSERT(!m_databaseGuard.tryLock());
unsigned long long quota = 0;
openTrackerDatabase(DontCreateIfDoesNotExist);
if (!m_database.isOpen())
return quota;
SQLiteStatement statement(m_database, "SELECT quota FROM Origins where origin=?;");
if (statement.prepare() != SQLITE_OK) {
LOG_ERROR("Failed to prepare statement.");
return quota;
}
statement.bindText(1, origin->databaseIdentifier());
if (statement.step() == SQLITE_ROW)
quota = statement.getColumnInt64(0);
return quota;
}
unsigned long long DatabaseTracker::quotaForOrigin(SecurityOrigin* origin)
{
LockHolder lockDatabase(m_databaseGuard);
return quotaForOriginNoLock(origin);
}
void DatabaseTracker::setQuota(SecurityOrigin* origin, unsigned long long quota)
{
LockHolder lockDatabase(m_databaseGuard);
if (quotaForOriginNoLock(origin) == quota)
return;
openTrackerDatabase(CreateIfDoesNotExist);
if (!m_database.isOpen())
return;
#if PLATFORM(IOS)
bool insertedNewOrigin = false;
#endif
bool originEntryExists = hasEntryForOriginNoLock(origin);
if (!originEntryExists) {
SQLiteStatement statement(m_database, "INSERT INTO Origins VALUES (?, ?)");
if (statement.prepare() != SQLITE_OK) {
LOG_ERROR("Unable to establish origin %s in the tracker", origin->databaseIdentifier().ascii().data());
} else {
statement.bindText(1, origin->databaseIdentifier());
statement.bindInt64(2, quota);
if (statement.step() != SQLITE_DONE)
LOG_ERROR("Unable to establish origin %s in the tracker", origin->databaseIdentifier().ascii().data());
#if PLATFORM(IOS)
else
insertedNewOrigin = true;
#endif
}
} else {
SQLiteStatement statement(m_database, "UPDATE Origins SET quota=? WHERE origin=?");
bool error = statement.prepare() != SQLITE_OK;
if (!error) {
statement.bindInt64(1, quota);
statement.bindText(2, origin->databaseIdentifier());
error = !statement.executeCommand();
}
if (error)
LOG_ERROR("Failed to set quota %llu in tracker database for origin %s", quota, origin->databaseIdentifier().ascii().data());
}
if (m_client)
#if PLATFORM(IOS)
{
if (insertedNewOrigin)
m_client->dispatchDidAddNewOrigin(origin);
#endif
m_client->dispatchDidModifyOrigin(origin);
#if PLATFORM(IOS)
}
#endif
}
bool DatabaseTracker::addDatabase(SecurityOrigin* origin, const String& name, const String& path)
{
ASSERT(!m_databaseGuard.tryLock());
openTrackerDatabase(CreateIfDoesNotExist);
if (!m_database.isOpen())
return false;
// New database should never be added until the origin has been established
ASSERT(hasEntryForOriginNoLock(origin));
SQLiteStatement statement(m_database, "INSERT INTO Databases (origin, name, path) VALUES (?, ?, ?);");
if (statement.prepare() != SQLITE_OK)
return false;
statement.bindText(1, origin->databaseIdentifier());
statement.bindText(2, name);
statement.bindText(3, path);
if (!statement.executeCommand()) {
LOG_ERROR("Failed to add database %s to origin %s: %s\n", name.ascii().data(), origin->databaseIdentifier().ascii().data(), m_database.lastErrorMsg());
return false;
}
if (m_client)
m_client->dispatchDidModifyOrigin(origin);
return true;
}
void DatabaseTracker::deleteAllDatabases()
{
Vector<RefPtr<SecurityOrigin>> originsCopy;
origins(originsCopy);
for (auto& origin : originsCopy)
deleteOrigin(origin.get());
}
void DatabaseTracker::deleteDatabasesModifiedSince(std::chrono::system_clock::time_point time)
{
Vector<RefPtr<SecurityOrigin>> originsCopy;
origins(originsCopy);
for (auto& origin : originsCopy) {
Vector<String> databaseNames;
if (!databaseNamesForOrigin(origin.get(), databaseNames))
continue;
size_t deletedDatabases = 0;
for (auto& databaseName : databaseNames) {
auto fullPath = fullPathForDatabase(origin.get(), databaseName, false);
time_t modificationTime;
if (!getFileModificationTime(fullPath, modificationTime))
continue;
if (modificationTime < std::chrono::system_clock::to_time_t(time))
continue;
deleteDatabase(origin.get(), databaseName);
++deletedDatabases;
}
if (deletedDatabases == databaseNames.size())
deleteOrigin(origin.get());
}
}
// It is the caller's responsibility to make sure that nobody is trying to create, delete, open, or close databases in this origin while the deletion is
// taking place.
bool DatabaseTracker::deleteOrigin(SecurityOrigin* origin)
{
Vector<String> databaseNames;
{
LockHolder lockDatabase(m_databaseGuard);
openTrackerDatabase(DontCreateIfDoesNotExist);
if (!m_database.isOpen())
return false;
if (!databaseNamesForOriginNoLock(origin, databaseNames)) {
LOG_ERROR("Unable to retrieve list of database names for origin %s", origin->databaseIdentifier().ascii().data());
return false;
}
if (!canDeleteOrigin(origin)) {
LOG_ERROR("Tried to delete an origin (%s) while either creating database in it or already deleting it", origin->databaseIdentifier().ascii().data());
ASSERT_NOT_REACHED();
return false;
}
recordDeletingOrigin(origin);
}
// We drop the lock here because holding locks during a call to deleteDatabaseFile will deadlock.
for (auto& name : databaseNames) {
if (!deleteDatabaseFile(origin, name)) {
// Even if the file can't be deleted, we want to try and delete the rest, don't return early here.
LOG_ERROR("Unable to delete file for database %s in origin %s", name.ascii().data(), origin->databaseIdentifier().ascii().data());
}
}
{
LockHolder lockDatabase(m_databaseGuard);
deleteOriginLockFor(origin);
doneDeletingOrigin(origin);
SQLiteStatement statement(m_database, "DELETE FROM Databases WHERE origin=?");
if (statement.prepare() != SQLITE_OK) {
LOG_ERROR("Unable to prepare deletion of databases from origin %s from tracker", origin->databaseIdentifier().ascii().data());
return false;
}
statement.bindText(1, origin->databaseIdentifier());
if (!statement.executeCommand()) {
LOG_ERROR("Unable to execute deletion of databases from origin %s from tracker", origin->databaseIdentifier().ascii().data());
return false;
}
SQLiteStatement originStatement(m_database, "DELETE FROM Origins WHERE origin=?");
if (originStatement.prepare() != SQLITE_OK) {
LOG_ERROR("Unable to prepare deletion of origin %s from tracker", origin->databaseIdentifier().ascii().data());
return false;
}
originStatement.bindText(1, origin->databaseIdentifier());
if (!originStatement.executeCommand()) {
LOG_ERROR("Unable to execute deletion of databases from origin %s from tracker", origin->databaseIdentifier().ascii().data());
return false;
}
SQLiteFileSystem::deleteEmptyDatabaseDirectory(originPath(origin));
RefPtr<SecurityOrigin> originPossiblyLastReference = origin;
bool isEmpty = true;
openTrackerDatabase(DontCreateIfDoesNotExist);
if (m_database.isOpen()) {
SQLiteStatement statement(m_database, "SELECT origin FROM Origins");
if (statement.prepare() != SQLITE_OK)
LOG_ERROR("Failed to prepare statement.");
else if (statement.step() == SQLITE_ROW)
isEmpty = false;
}
// If we removed the last origin, do some additional deletion.
if (isEmpty) {
if (m_database.isOpen())
m_database.close();
SQLiteFileSystem::deleteDatabaseFile(trackerDatabasePath());
SQLiteFileSystem::deleteEmptyDatabaseDirectory(m_databaseDirectoryPath);
}
if (m_client) {
m_client->dispatchDidModifyOrigin(origin);
#if PLATFORM(IOS)
m_client->dispatchDidDeleteDatabaseOrigin();
#endif
for (auto& name : databaseNames)
m_client->dispatchDidModifyDatabase(origin, name);
}
}
return true;
}
bool DatabaseTracker::isDeletingDatabaseOrOriginFor(SecurityOrigin *origin, const String& name)
{
ASSERT(!m_databaseGuard.tryLock());
// Can't create a database while someone else is deleting it; there's a risk of leaving untracked database debris on the disk.
return isDeletingDatabase(origin, name) || isDeletingOrigin(origin);
}
void DatabaseTracker::recordCreatingDatabase(SecurityOrigin *origin, const String& name)
{
ASSERT(!m_databaseGuard.tryLock());
NameCountMap* nameMap = m_beingCreated.get(origin);
if (!nameMap) {
nameMap = new NameCountMap();
m_beingCreated.set(origin->isolatedCopy(), nameMap);
}
long count = nameMap->get(name);
nameMap->set(name.isolatedCopy(), count + 1);
}
void DatabaseTracker::doneCreatingDatabase(SecurityOrigin *origin, const String& name)
{
ASSERT(!m_databaseGuard.tryLock());
NameCountMap* nameMap = m_beingCreated.get(origin);
ASSERT(nameMap);
if (!nameMap)
return;
long count = nameMap->get(name);
ASSERT(count > 0);
if (count <= 1) {
nameMap->remove(name);
if (nameMap->isEmpty()) {
m_beingCreated.remove(origin);
delete nameMap;
}
} else
nameMap->set(name, count - 1);
}
bool DatabaseTracker::creatingDatabase(SecurityOrigin *origin, const String& name)
{
ASSERT(!m_databaseGuard.tryLock());
NameCountMap* nameMap = m_beingCreated.get(origin);
return nameMap && nameMap->get(name);