io-wq: cancel request if it's asking for files and we don't have them

This can't currently happen, but will be possible shortly. Handle missing files just like we do not being able to grab a needed mm, and mark the request as needing cancelation. Signed-off-by: Jens Axboe <[email protected]>
tonyvar · Nov 4, 2020 · 3dd1680 · 3dd1680
1 parent 3cea11c
commit 3dd1680
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/fs/io-wq.c b/fs/io-wq.c
@@ -482,6 +482,10 @@ static void io_impersonate_work(struct io_worker *worker,
 		current->files = work->identity->files;
 		current->nsproxy = work->identity->nsproxy;
 		task_unlock(current);
+		if (!work->identity->files) {
+			/* failed grabbing files, ensure work gets cancelled */
+			work->flags |= IO_WQ_WORK_CANCEL;
+		}
 	}
 	if ((work->flags & IO_WQ_WORK_FS) && current->fs != work->identity->fs)
 		current->fs = work->identity->fs;