From: Pavel Begunkov <asml.silence@gmail.com>
Date: Tue, 19 Nov 2019 20:32:48 +0000 (+0300)
Subject: io_uring: break links for failed defer
X-Git-Tag: v5.5-rc1~127^2~31
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=d3b35796b1e3f118017491d621f624e0de7ff9fb;p=users%2Fjedix%2Flinux-maple.git

io_uring: break links for failed defer

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>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 6550b7eab7d2..c1226f609e18 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2958,6 +2958,8 @@ 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
@@ -2990,6 +2992,8 @@ 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);