From: Jens Axboe <axboe@kernel.dk>
Date: Tue, 16 Feb 2021 19:07:14 +0000 (-0700)
Subject: engines/io_uring: add verbose error for ENOSYS
X-Git-Tag: fio-3.26~9
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=c4f5c92fac8a39ffff29d57e99c3c0163358dd7a;p=fio.git

engines/io_uring: add verbose error for ENOSYS

If we get ENOSYS for setting up the rings, then the kernel is too old
to support io_uring. Mention that explicitly.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/engines/io_uring.c b/engines/io_uring.c
index 9ce2ae80..c9036ba0 100644
--- a/engines/io_uring.c
+++ b/engines/io_uring.c
@@ -696,7 +696,11 @@ static int fio_ioring_post_init(struct thread_data *td)
 
 	err = fio_ioring_queue_init(td);
 	if (err) {
-		td_verror(td, errno, "io_queue_init");
+		int __errno = errno;
+
+		if (__errno == ENOSYS)
+			log_err("fio: your kernel doesn't support io_uring\n");
+		td_verror(td, __errno, "io_queue_init");
 		return 1;
 	}