261 lines
7.6 KiB
PHP
261 lines
7.6 KiB
PHP
<?php
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/**
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Vincent Petry <pvince81@owncloud.com>
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*
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* @copyright Copyright (c) 2015, ownCloud, Inc.
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Repair;
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use OC\Hooks\BasicEmitter;
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class RepairLegacyStorages extends BasicEmitter {
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/**
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* @var \OCP\IConfig
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*/
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protected $config;
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/**
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* @var \OC\DB\Connection
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*/
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protected $connection;
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protected $findStorageInCacheStatement;
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protected $renameStorageStatement;
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/**
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* @param \OCP\IConfig $config
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* @param \OC\DB\Connection $connection
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*/
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public function __construct($config, $connection) {
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$this->connection = $connection;
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$this->config = $config;
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$this->findStorageInCacheStatement = $this->connection->prepare(
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'SELECT DISTINCT `storage` FROM `*PREFIX*filecache`'
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. ' WHERE `storage` in (?, ?)'
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);
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$this->renameStorageStatement = $this->connection->prepare(
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'UPDATE `*PREFIX*storages`'
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. ' SET `id` = ?'
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. ' WHERE `id` = ?'
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);
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}
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public function getName() {
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return 'Repair legacy storages';
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}
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/**
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* Extracts the user id from a legacy storage id
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*
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* @param string $storageId legacy storage id in the
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* format "local::/path/to/datadir/userid"
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* @return string user id extracted from the storage id
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*/
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private function extractUserId($storageId) {
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$storageId = rtrim($storageId, '/');
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$pos = strrpos($storageId, '/');
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return substr($storageId, $pos + 1);
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}
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/**
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* Fix the given legacy storage by renaming the old id
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* to the new id. If the new id already exists, whichever
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* storage that has data in the file cache will be used.
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* If both have data, nothing will be done and false is
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* returned.
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*
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* @param string $oldId old storage id
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* @param int $oldNumericId old storage numeric id
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*
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* @return bool true if fixed, false otherwise
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*/
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private function fixLegacyStorage($oldId, $oldNumericId, $userId = null) {
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// check whether the new storage already exists
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if (is_null($userId)) {
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$userId = $this->extractUserId($oldId);
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}
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$newId = 'home::' . $userId;
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// check if target id already exists
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$newNumericId = \OC\Files\Cache\Storage::getNumericStorageId($newId);
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if (!is_null($newNumericId)) {
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$newNumericId = (int)$newNumericId;
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// try and resolve the conflict
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// check which one of "local::" or "home::" needs to be kept
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$result = $this->findStorageInCacheStatement->execute(array($oldNumericId, $newNumericId));
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$row1 = $this->findStorageInCacheStatement->fetch();
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$row2 = $this->findStorageInCacheStatement->fetch();
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$this->findStorageInCacheStatement->closeCursor();
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if ($row2 !== false) {
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// two results means both storages have data, not auto-fixable
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throw new \OC\RepairException(
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'Could not automatically fix legacy storage '
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. '"' . $oldId . '" => "' . $newId . '"'
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. ' because they both have data.'
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);
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}
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if ($row1 === false || (int)$row1['storage'] === $oldNumericId) {
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// old storage has data, then delete the empty new id
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$toDelete = $newId;
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} else if ((int)$row1['storage'] === $newNumericId) {
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// new storage has data, then delete the empty old id
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$toDelete = $oldId;
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} else {
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// unknown case, do not continue
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return false;
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}
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// delete storage including file cache
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\OC\Files\Cache\Storage::remove($toDelete);
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// if we deleted the old id, the new id will be used
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// automatically
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if ($toDelete === $oldId) {
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// nothing more to do
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return true;
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}
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}
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// rename old id to new id
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$newId = \OC\Files\Cache\Storage::adjustStorageId($newId);
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$oldId = \OC\Files\Cache\Storage::adjustStorageId($oldId);
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$rowCount = $this->renameStorageStatement->execute(array($newId, $oldId));
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$this->renameStorageStatement->closeCursor();
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return ($rowCount === 1);
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}
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/**
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* Converts legacy home storage ids in the format
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* "local::/data/dir/path/userid/" to the new format "home::userid"
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*/
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public function run() {
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// only run once
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if ($this->config->getAppValue('core', 'repairlegacystoragesdone') === 'yes') {
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return;
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}
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$dataDir = $this->config->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data/');
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$dataDir = rtrim($dataDir, '/') . '/';
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$dataDirId = 'local::' . $dataDir;
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$count = 0;
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$hasWarnings = false;
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$this->connection->beginTransaction();
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// note: not doing a direct UPDATE with the REPLACE function
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// because regexp search/extract is needed and it is not guaranteed
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// to work on all database types
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$sql = 'SELECT `id`, `numeric_id` FROM `*PREFIX*storages`'
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. ' WHERE `id` LIKE ?'
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. ' ORDER BY `id`';
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$result = $this->connection->executeQuery($sql, array($dataDirId . '%'));
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while ($row = $result->fetch()) {
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$currentId = $row['id'];
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// one entry is the datadir itself
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if ($currentId === $dataDirId) {
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continue;
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}
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try {
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if ($this->fixLegacyStorage($currentId, (int)$row['numeric_id'])) {
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$count++;
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}
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}
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catch (\OC\RepairException $e) {
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$hasWarnings = true;
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$this->emit(
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'\OC\Repair',
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'warning',
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array('Could not repair legacy storage ' . $currentId . ' automatically.')
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);
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}
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}
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// check for md5 ids, not in the format "prefix::"
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$sql = 'SELECT COUNT(*) AS "c" FROM `*PREFIX*storages`'
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. ' WHERE `id` NOT LIKE \'%::%\'';
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$result = $this->connection->executeQuery($sql);
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$row = $result->fetch();
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// find at least one to make sure it's worth
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// querying the user list
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if ((int)$row['c'] > 0) {
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$userManager = \OC_User::getManager();
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// use chunks to avoid caching too many users in memory
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$limit = 30;
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$offset = 0;
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do {
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// query the next page of users
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$results = $userManager->search('', $limit, $offset);
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$storageIds = array();
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$userIds = array();
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foreach ($results as $uid => $userObject) {
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$storageId = $dataDirId . $uid . '/';
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if (strlen($storageId) <= 64) {
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// skip short storage ids as they were handled in the previous section
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continue;
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}
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$storageIds[$uid] = $storageId;
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}
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if (count($storageIds) > 0) {
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// update the storages of these users
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foreach ($storageIds as $uid => $storageId) {
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$numericId = \OC\Files\Cache\Storage::getNumericStorageId($storageId);
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try {
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if (!is_null($numericId) && $this->fixLegacyStorage($storageId, (int)$numericId)) {
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$count++;
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}
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}
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catch (\OC\RepairException $e) {
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$hasWarnings = true;
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$this->emit(
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'\OC\Repair',
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'warning',
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array('Could not repair legacy storage ' . $storageId . ' automatically.')
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);
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}
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}
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}
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$offset += $limit;
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} while (count($results) >= $limit);
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}
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$this->emit('\OC\Repair', 'info', array('Updated ' . $count . ' legacy home storage ids'));
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$this->connection->commit();
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if ($hasWarnings) {
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$this->emit(
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'\OC\Repair',
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'warning',
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array('Some legacy storages could not be repaired. Please manually fix them then re-run ./occ maintenance:repair')
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);
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} else {
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// if all were done, no need to redo the repair during next upgrade
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$this->config->setAppValue('core', 'repairlegacystoragesdone', 'yes');
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}
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}
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}
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