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<?php
/**
* SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCA\Files\Command;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
/**
* Delete all file entries that have no matching entries in the storage table.
*/
class DeleteOrphanedFiles extends Command {
public const CHUNK_SIZE = 200;
public function __construct(
protected IDBConnection $connection,
) {
parent::__construct();
}
protected function configure(): void {
$this
->setName('files:cleanup')
->setDescription('cleanup filecache')
->addOption('skip-filecache-extended', null, InputOption::VALUE_NONE, 'don\'t remove orphaned entries from filecache_extended');
}
public function execute(InputInterface $input, OutputInterface $output): int {
$deletedEntries = 0;
$fileIdsByStorage = [];
$deletedStorages = array_diff($this->getReferencedStorages(), $this->getExistingStorages());
$deleteExtended = !$input->getOption('skip-filecache-extended');
if ($deleteExtended) {
$fileIdsByStorage = $this->getFileIdsForStorages($deletedStorages);
}
$deleteQuery = $this->connection->getQueryBuilder();
$deleteQuery->delete('filecache')
->where($deleteQuery->expr()->in('storage', $deleteQuery->createParameter('storage_ids')));
$deletedStorageChunks = array_chunk($deletedStorages, self::CHUNK_SIZE);
foreach ($deletedStorageChunks as $deletedStorageChunk) {
$deleteQuery->setParameter('storage_ids', $deletedStorageChunk, IQueryBuilder::PARAM_INT_ARRAY);
$deletedEntries += $deleteQuery->executeStatement();
}
$output->writeln("$deletedEntries orphaned file cache entries deleted");
if ($deleteExtended) {
$deletedFileCacheExtended = $this->cleanupOrphanedFileCacheExtended($fileIdsByStorage);
$output->writeln("$deletedFileCacheExtended orphaned file cache extended entries deleted");
}
$deletedMounts = $this->cleanupOrphanedMounts();
$output->writeln("$deletedMounts orphaned mount entries deleted");
return self::SUCCESS;
}
private function getReferencedStorages(): array {
$query = $this->connection->getQueryBuilder();
$query->select('storage')
->from('filecache')
->groupBy('storage')
->runAcrossAllShards();
return $query->executeQuery()->fetchAll(\PDO::FETCH_COLUMN);
}
private function getExistingStorages(): array {
$query = $this->connection->getQueryBuilder();
$query->select('numeric_id')
->from('storages')
->groupBy('numeric_id');
return $query->executeQuery()->fetchAll(\PDO::FETCH_COLUMN);
}
/**
* @param int[] $storageIds
* @return array<int, int[]>
*/
private function getFileIdsForStorages(array $storageIds): array {
$query = $this->connection->getQueryBuilder();
$query->select('storage', 'fileid')
->from('filecache')
->where($query->expr()->in('storage', $query->createParameter('storage_ids')));
$result = [];
$storageIdChunks = array_chunk($storageIds, self::CHUNK_SIZE);
foreach ($storageIdChunks as $storageIdChunk) {
$query->setParameter('storage_ids', $storageIdChunk, IQueryBuilder::PARAM_INT_ARRAY);
$chunk = $query->executeQuery()->fetchAll();
foreach ($chunk as $row) {
$result[$row['storage']][] = $row['fileid'];
}
}
return $result;
}
/**
* @param array<int, int[]> $fileIdsByStorage
* @return int
*/
private function cleanupOrphanedFileCacheExtended(array $fileIdsByStorage): int {
$deletedEntries = 0;
$deleteQuery = $this->connection->getQueryBuilder();
$deleteQuery->delete('filecache_extended')
->where($deleteQuery->expr()->in('fileid', $deleteQuery->createParameter('file_ids')));
foreach ($fileIdsByStorage as $storageId => $fileIds) {
$deleteQuery->hintShardKey('storage', $storageId, true);
$fileChunks = array_chunk($fileIds, self::CHUNK_SIZE);
foreach ($fileChunks as $fileChunk) {
$deleteQuery->setParameter('file_ids', $fileChunk, IQueryBuilder::PARAM_INT_ARRAY);
$deletedEntries += $deleteQuery->executeStatement();
}
}
return $deletedEntries;
}
private function cleanupOrphanedMounts(): int {
$deletedEntries = 0;
$query = $this->connection->getQueryBuilder();
$query->select('m.storage_id')
->from('mounts', 'm')
->where($query->expr()->isNull('s.numeric_id'))
->leftJoin('m', 'storages', 's', $query->expr()->eq('m.storage_id', 's.numeric_id'))
->groupBy('storage_id')
->setMaxResults(self::CHUNK_SIZE);
$deleteQuery = $this->connection->getQueryBuilder();
$deleteQuery->delete('mounts')
->where($deleteQuery->expr()->eq('storage_id', $deleteQuery->createParameter('storageid')));
$deletedInLastChunk = self::CHUNK_SIZE;
while ($deletedInLastChunk === self::CHUNK_SIZE) {
$deletedInLastChunk = 0;
$result = $query->execute();
while ($row = $result->fetch()) {
$deletedInLastChunk++;
$deletedEntries += $deleteQuery->setParameter('storageid', (int)$row['storage_id'])
->execute();
}
$result->closeCursor();
}
return $deletedEntries;
}
}
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