From: Jens Axboe Date: Mon, 2 May 2022 03:19:50 +0000 (-0600) Subject: io_uring: assign non-fixed early for async work X-Git-Tag: v6.1-rc5~1392^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a196c78b5443fc61af2c0490213b9d125482cbd1;p=platform%2Fkernel%2Flinux-starfive.git io_uring: assign non-fixed early for async work We defer file assignment to ensure that fixed files work with links between a direct accept/open and the links that follow it. But this has the side effect that normal file assignment is then not complete by the time that request submission has been done. For deferred execution, if the file is a regular file, assign it when we do the async prep anyway. Signed-off-by: Jens Axboe --- diff --git a/fs/io_uring.c b/fs/io_uring.c index e01f595..91de361 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -6947,7 +6947,12 @@ static int io_req_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) static int io_req_prep_async(struct io_kiocb *req) { - if (!io_op_defs[req->opcode].needs_async_setup) + const struct io_op_def *def = &io_op_defs[req->opcode]; + + /* assign early for deferred execution for non-fixed file */ + if (def->needs_file && !(req->flags & REQ_F_FIXED_FILE)) + req->file = io_file_get_normal(req, req->fd); + if (!def->needs_async_setup) return 0; if (WARN_ON_ONCE(req_has_async_data(req))) return -EFAULT;