From patchwork Thu Mar 14 03:17:19 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anand Jain X-Patchwork-Id: 2267431 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 83B32DFB79 for ; Thu, 14 Mar 2013 03:17:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756555Ab3CNDQt (ORCPT ); Wed, 13 Mar 2013 23:16:49 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:43227 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753653Ab3CNDQt (ORCPT ); Wed, 13 Mar 2013 23:16:49 -0400 Received: from ucsinet21.oracle.com (ucsinet21.oracle.com [156.151.31.93]) by userp1040.oracle.com (Sentrion-MTA-4.3.1/Sentrion-MTA-4.3.1) with ESMTP id r2E3Gl2Z024138 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 14 Mar 2013 03:16:48 GMT Received: from acsmt358.oracle.com (acsmt358.oracle.com [141.146.40.158]) by ucsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id r2E3Gl0j013625 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 14 Mar 2013 03:16:47 GMT Received: from abhmt115.oracle.com (abhmt115.oracle.com [141.146.116.67]) by acsmt358.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id r2E3Gla4007822 for ; Wed, 13 Mar 2013 22:16:47 -0500 Received: from wish.sg.oracle.com (/10.186.101.18) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 13 Mar 2013 20:16:46 -0700 From: Anand Jain To: linux-btrfs@vger.kernel.org Subject: [PATCH] btrfs-progs: print errno string when /dev/btrfs-control open fails Date: Thu, 14 Mar 2013 11:17:19 +0800 Message-Id: <1363231039-7580-1-git-send-email-anand.jain@oracle.com> X-Mailer: git-send-email 1.8.1.164.g2d0029e X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Of recently and intermittently I am seeing open fail for /dev/btrfs-control (btrfs is loaded), and there are no dmesg errors, this may not be a complete help in digging this issue but something which is necessary. Thanks Signed-off-by: Anand Jain --- utils.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/utils.c b/utils.c index c29861b..17c6553 100644 --- a/utils.c +++ b/utils.c @@ -938,7 +938,8 @@ void btrfs_register_one_device(char *fname) fd = open("/dev/btrfs-control", O_RDONLY); if (fd < 0) { fprintf(stderr, "failed to open /dev/btrfs-control " - "skipping device registration\n"); + "%s, skipping device registration\n", + strerror(errno)); return; } strncpy(args.name, fname, BTRFS_PATH_NAME_MAX);