From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751241AbcBURy1 (ORCPT ); Sun, 21 Feb 2016 12:54:27 -0500 Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:60684 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750708AbcBURxN (ORCPT ); Sun, 21 Feb 2016 12:53:13 -0500 From: Markus Pargmann To: Jens Axboe Cc: linux-kernel@vger.kernel.org, nbd-general@lists.sourceforge.net, kernel@pengutronix.de, Markus Pargmann Subject: [PATCH 3/7] nbd: Timeouts are not user requested disconnects Date: Sun, 21 Feb 2016 15:01:23 +0100 Message-Id: <1456063287-28941-4-git-send-email-mpa@pengutronix.de> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1456063287-28941-1-git-send-email-mpa@pengutronix.de> References: <1456063287-28941-1-git-send-email-mpa@pengutronix.de> X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: mpa@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It may be useful to know in the client that a connection timed out. The current code returns success for a timeout. This patch reports the error code -ETIMEDOUT for a timeout. Signed-off-by: Markus Pargmann --- drivers/block/nbd.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 438f4dc549db..2e14e51b5ea3 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -57,6 +57,7 @@ struct nbd_device { int blksize; loff_t bytesize; int xmit_timeout; + bool timedout; bool disconnect; /* a disconnect has been requested by user */ struct timer_list timeout_timer; @@ -154,10 +155,9 @@ static void nbd_xmit_timeout(unsigned long arg) if (list_empty(&nbd->queue_head)) return; - nbd->disconnect = true; - spin_lock_irqsave(&nbd->sock_lock, flags); + nbd->timedout = true; if (nbd->sock) kernel_sock_shutdown(nbd->sock, SHUT_RDWR); @@ -754,7 +754,10 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, if (max_part > 0) blkdev_reread_part(bdev); if (nbd->disconnect) /* user requested, ignore socket errors */ - return 0; + error = 0; + if (nbd->timedout) + error = -ETIMEDOUT; + return error; } -- 2.7.0