From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:37991 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932231AbbHNKdr (ORCPT ); Fri, 14 Aug 2015 06:33:47 -0400 From: Anand Jain To: linux-btrfs@vger.kernel.org Cc: clm@fb.com, dsterba@suse.cz Subject: [PATCH 16/23] Btrfs: device path change must be logged Date: Fri, 14 Aug 2015 18:33:01 +0800 Message-Id: <1439548388-29686-17-git-send-email-anand.jain@oracle.com> In-Reply-To: <1439548388-29686-1-git-send-email-anand.jain@oracle.com> References: <1439548388-29686-1-git-send-email-anand.jain@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: >>From the issue diagnosable point of view, log if the device path is changed. Signed-off-by: Anand Jain --- fs/btrfs/volumes.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index ebf37a9..dcb10fa 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -595,6 +595,10 @@ static noinline int device_list_add(const char *path, return -EEXIST; } + printk_in_rcu(KERN_INFO \ + "BTRFS: device fsid %pU devid %llu old path %s new path %s\n", + disk_super->fsid, devid, rcu_str_deref(device->name), path); + name = rcu_string_strdup(path, GFP_NOFS); if (!name) return -ENOMEM; -- 2.4.1