Merge pull request #17926 from nextcloud/dav-upload-shared-lock-expired
re-acquired expired shared locks on large file uploads
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commit
224073ea7b
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@ -252,10 +252,22 @@ class File extends Node implements IFile {
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try {
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$this->changeLock(ILockingProvider::LOCK_EXCLUSIVE);
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} catch (LockedException $e) {
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if ($needsPartFile) {
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$partStorage->unlink($internalPartPath);
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// during very large uploads, the shared lock we got at the start might have been expired
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// meaning that the above lock can fail not just only because somebody else got a shared lock
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// or because there is no existing shared lock to make exclusive
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//
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// Thus we try to get a new exclusive lock, if the original lock failed because of a different shared
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// lock this will still fail, if our original shared lock expired the new lock will be successful and
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// the entire operation will be safe
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try {
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$this->acquireLock(ILockingProvider::LOCK_EXCLUSIVE);
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} catch (LockedException $e) {
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if ($needsPartFile) {
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$partStorage->unlink($internalPartPath);
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}
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throw new FileLocked($e->getMessage(), $e->getCode(), $e);
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}
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throw new FileLocked($e->getMessage(), $e->getCode(), $e);
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}
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// rename to correct path
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@ -1201,4 +1201,25 @@ class FileTest extends TestCase {
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$this->assertEquals('new content', $view->file_get_contents('root/file.txt'));
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}
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public function testPutLockExpired() {
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$view = new \OC\Files\View('/' . $this->user . '/files/');
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$path = 'test-locking.txt';
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$info = new \OC\Files\FileInfo(
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'/' . $this->user . '/files/' . $path,
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$this->getMockStorage(),
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null,
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['permissions' => \OCP\Constants::PERMISSION_ALL],
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null
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);
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$file = new \OCA\DAV\Connector\Sabre\File($view, $info);
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// don't lock before the PUT to simulate an expired shared lock
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$this->assertNotEmpty($file->put($this->getStream('test data')));
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// afterMethod unlocks
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$view->unlockFile($path, ILockingProvider::LOCK_SHARED);
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}
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}
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