io_uring: cancel-match based on flags

Instead of going into request internals, like checking req->file->f_op,
do match them based on REQ_F_INFLIGHT, it's set only when we want it to
be reliably cancelled.

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 b1734ef..fb4abea 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -703,7 +703,7 @@ enum {
 
        /* fail rest of links */
        REQ_F_FAIL_LINK         = BIT(REQ_F_FAIL_LINK_BIT),
-       /* on inflight list */
+       /* on inflight list, should be cancelled and waited on exit reliably */
        REQ_F_INFLIGHT          = BIT(REQ_F_INFLIGHT_BIT),
        /* read/write uses file position */
        REQ_F_CUR_POS           = BIT(REQ_F_CUR_POS_BIT),
@@ -1069,7 +1069,7 @@ static bool io_match_task(struct io_kiocb *head,
                return true;
 
        io_for_each_link(req, head) {
-               if (req->file && req->file->f_op == &io_uring_fops)
+               if (req->flags & REQ_F_INFLIGHT)
                        return true;
                if (req->task->files == files)
                        return true;