io_uring: punt splice async because of inode mutex

Nonblocking do_splice() still may wait for some time on an inode mutex.
Let's play safe and always punt it async.

Reported-by: Jens Axboe <axboe@kernel.dk>
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 91ddc27..0b91b06 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2768,15 +2768,6 @@ static int io_splice_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
        return 0;
 }
 
-static bool io_splice_punt(struct file *file, int rw)
-{
-       if (get_pipe_info(file))
-               return false;
-       if (!io_file_supports_async(file, rw))
-               return true;
-       return !(file->f_flags & O_NONBLOCK);
-}
-
 static int io_splice(struct io_kiocb *req, bool force_nonblock)
 {
        struct io_splice *sp = &req->splice;
@@ -2786,11 +2777,8 @@ static int io_splice(struct io_kiocb *req, bool force_nonblock)
        loff_t *poff_in, *poff_out;
        long ret;
 
-       if (force_nonblock) {
-               if (io_splice_punt(in, READ) || io_splice_punt(out, WRITE))
-                       return -EAGAIN;
-               flags |= SPLICE_F_NONBLOCK;
-       }
+       if (force_nonblock)
+               return -EAGAIN;
 
        poff_in = (sp->off_in == -1) ? NULL : &sp->off_in;
        poff_out = (sp->off_out == -1) ? NULL : &sp->off_out;