* @author Morris Jobke * @author Thomas Müller * @author Vincent Petry * * @license AGPL-3.0 * * This code is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License, version 3, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License, version 3, * along with this program. If not, see * */ namespace OC\Repair; use OCP\Migration\IOutput; use OCP\Migration\IRepairStep; /** * Repairs shares with invalid data */ class RepairInvalidShares implements IRepairStep { const CHUNK_SIZE = 200; /** @var \OCP\IConfig */ protected $config; /** @var \OCP\IDBConnection */ protected $connection; /** * @param \OCP\IConfig $config * @param \OCP\IDBConnection $connection */ public function __construct($config, $connection) { $this->connection = $connection; $this->config = $config; } public function getName() { return 'Repair invalid shares'; } /** * Past bugs would make it possible to set an expiration date on user shares even * though it is not supported. This functions removes the expiration date from such entries. */ private function removeExpirationDateFromNonLinkShares(IOutput $out) { $builder = $this->connection->getQueryBuilder(); $builder ->update('share') ->set('expiration', 'null') ->where($builder->expr()->isNotNull('expiration')) ->andWhere($builder->expr()->neq('share_type', $builder->expr()->literal(\OC\Share\Constants::SHARE_TYPE_LINK))); $updatedEntries = $builder->execute(); if ($updatedEntries > 0) { $out->info('Removed invalid expiration date from ' . $updatedEntries . ' shares'); } } /** * In the past link shares with public upload enabled were missing the delete permission. */ private function addShareLinkDeletePermission(IOutput $out) { $oldPerms = \OCP\Constants::PERMISSION_READ | \OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE; $newPerms = \OCP\Constants::PERMISSION_READ | \OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE; $builder = $this->connection->getQueryBuilder(); $builder ->update('share') ->set('permissions', $builder->expr()->literal($newPerms)) ->where($builder->expr()->eq('share_type', $builder->expr()->literal(\OC\Share\Constants::SHARE_TYPE_LINK))) ->andWhere($builder->expr()->eq('permissions', $builder->expr()->literal($oldPerms))); $updatedEntries = $builder->execute(); if ($updatedEntries > 0) { $out->info('Fixed link share permissions for ' . $updatedEntries . ' shares'); } } /** * Remove shares where the parent share does not exist anymore */ private function removeSharesNonExistingParent(IOutput $out) { $deletedEntries = 0; $query = $this->connection->getQueryBuilder(); $query->select('s1.parent') ->from('share', 's1') ->where($query->expr()->isNotNull('s1.parent')) ->andWhere($query->expr()->isNull('s2.id')) ->leftJoin('s1', 'share', 's2', $query->expr()->eq('s1.parent', 's2.id')) ->groupBy('s1.parent') ->setMaxResults(self::CHUNK_SIZE); $deleteQuery = $this->connection->getQueryBuilder(); $deleteQuery->delete('share') ->where($deleteQuery->expr()->eq('parent', $deleteQuery->createParameter('parent'))); $deletedInLastChunk = self::CHUNK_SIZE; while ($deletedInLastChunk === self::CHUNK_SIZE) { $deletedInLastChunk = 0; $result = $query->execute(); while ($row = $result->fetch()) { $deletedInLastChunk++; $deletedEntries += $deleteQuery->setParameter('parent', (int) $row['parent']) ->execute(); } $result->closeCursor(); } if ($deletedEntries) { $out->info('Removed ' . $deletedEntries . ' shares where the parent did not exist'); } } public function run(IOutput $out) { $ocVersionFromBeforeUpdate = $this->config->getSystemValue('version', '0.0.0'); if (version_compare($ocVersionFromBeforeUpdate, '8.2.0.7', '<')) { // this situation was only possible before 8.2 $this->removeExpirationDateFromNonLinkShares($out); } if (version_compare($ocVersionFromBeforeUpdate, '9.1.0.9', '<')) { // this situation was only possible before 9.1 $this->addShareLinkDeletePermission($out); } $this->removeSharesNonExistingParent($out); } }