block/io_uring: improve error message when init fails
The man page for io_uring_queue_init states:
> io_uring_queue_init(3) returns 0 on success and -errno on failure.
and the man page for io_uring_setup (which is one of the functions
where the return value of io_uring_queue_init() can come from) states:
> On error, a negative error code is returned. The caller should not
> rely on errno variable.
Tested using 'sysctl kernel.io_uring_disabled=2'. Output before this
change:
> failed to init linux io_uring ring
Output after this change:
> failed to init linux io_uring ring: Operation not permitted
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20240123135044.204985-1-f.ebner@proxmox.com>
diff --git a/block/io_uring.c b/block/io_uring.c
index d77ae55..d11b205 100644
--- a/block/io_uring.c
+++ b/block/io_uring.c
@@ -432,7 +432,7 @@
rc = io_uring_queue_init(MAX_ENTRIES, ring, 0);
if (rc < 0) {
- error_setg_errno(errp, errno, "failed to init linux io_uring ring");
+ error_setg_errno(errp, -rc, "failed to init linux io_uring ring");
g_free(s);
return NULL;
}
