[PATCH 3/7] io_uring: break links for failed defer

Jens Axboe
2019-11-20T20:09:59Z

From: Pavel Begunkov <asml.silence@gmail.com>

If io_req_defer() failed, it needs to cancel a dependant link.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
fs/io_uring.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index ebc58f896088..7b9bd6ad4fb9 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2943,6 +2943,8 @@ static void io_queue_sqe(struct io_kiocb *req)
if (ret) {
if (ret != -EIOCBQUEUED) {
io_cqring_add_event(req, ret);
+ if (req->flags & REQ_F_LINK)
+ req->flags |= REQ_F_FAIL_LINK;
io_double_put_req(req);
}
} else
@@ -2975,6 +2977,8 @@ static void io_queue_link_head(struct io_kiocb *req, struct io_kiocb *shadow)
if (ret != -EIOCBQUEUED) {
err:
io_cqring_add_event(req, ret);
+ if (req->flags & REQ_F_LINK)
+ req->flags |= REQ_F_FAIL_LINK;
io_double_put_req(req);
if (shadow)
__io_free_req(shadow);
--
2.24.0