From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753925AbcAWRC7 (ORCPT ); Sat, 23 Jan 2016 12:02:59 -0500 Received: from barbershop.grep.be ([89.106.240.122]:37879 "EHLO barbershop.grep.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751251AbcAWRC4 (ORCPT ); Sat, 23 Jan 2016 12:02:56 -0500 X-Greylist: delayed 2327 seconds by postgrey-1.27 at vger.kernel.org; Sat, 23 Jan 2016 12:02:56 EST From: Wouter Verhelst To: Markus Pargmann , nbd-general@lists.sourceforge.net (open list:NETWORK BLOCK DEVICE (NBD)), linux-kernel@vger.kernel.org (open list) Cc: Wouter Verhelst Subject: [PATCH] Issue a uevent when disconnecting Date: Sat, 23 Jan 2016 17:23:49 +0100 Message-Id: <1453566230-5786-1-git-send-email-w@uter.be> X-Mailer: git-send-email 2.7.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There already is a uevent by default when closing a device upon connect of the device. However, the same isn't true on disconnect. This makes it hard for userspace to keep track of whether a device is connected, since we are notified when the connection is created, but not when it is removed again. Explicitly issue a "change" uevent to remedy. Signed-off-by: Wouter Verhelst --- drivers/block/nbd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index e4c5cc1..43dcc12 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -438,6 +438,7 @@ static int nbd_thread_recv(struct nbd_device *nbd) } device_remove_file(disk_to_dev(nbd->disk), &pid_attr); + kobject_uevent(&disk_to_dev(nbd->disk)->kobj, KOBJ_CHANGE); spin_lock_irqsave(&nbd->tasks_lock, flags); nbd->task_recv = NULL; -- 2.7.0