From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C65D1C7618F for ; Mon, 15 Jul 2019 11:33:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 98F832080A for ; Mon, 15 Jul 2019 11:33:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729803AbfGOLdh (ORCPT ); Mon, 15 Jul 2019 07:33:37 -0400 Received: from smtp02.belwue.de ([129.143.71.87]:61033 "EHLO smtp02.belwue.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729725AbfGOLdh (ORCPT ); Mon, 15 Jul 2019 07:33:37 -0400 Received: from fex.rus.uni-stuttgart.de (fex.rus.uni-stuttgart.de [129.69.1.129]) by smtp02.belwue.de (Postfix) with SMTP id 9FF9E88C5 for ; Mon, 15 Jul 2019 13:33:34 +0200 (MEST) Date: Mon, 15 Jul 2019 13:33:34 +0200 From: Ulli Horlacher To: linux-btrfs@vger.kernel.org Subject: Re: find subvolume directories Message-ID: <20190715113334.GA17669@tik.uni-stuttgart.de> Mail-Followup-To: linux-btrfs@vger.kernel.org References: <20190712231705.GA16856@tik.uni-stuttgart.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190712231705.GA16856@tik.uni-stuttgart.de> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Sat 2019-07-13 (01:17), Ulli Horlacher wrote: > I need to find (all) subvolume directories. > I know, btrfs subvolumes root directories have inode #256, but a > "find / -inum 256" is horrible slow! At least, I want to exclude non-btrfs filesystems to speed up the find run, but find cannot detect snapshots (as part of btrfs): root@trulla:~# find /opt -inum 256 -printf "%p %F\n" /opt btrfs /opt/.snapshot/2019-07-10_0000.daily unknown /opt/.snapshot/2019-07-11_0000.daily unknown /opt/.snapshot/2019-07-12_0000.daily unknown /opt/.snapshot/2019-07-13_0000.daily unknown /opt/.snapshot/2019-07-15_0000.daily unknown /opt/.snapshot/2019-07-15_1200.hourly unknown /opt/.snapshot/2019-07-15_1300.hourly unknown root@trulla:~# find /opt -inum 256 \( -fstype btrfs -o -fstype unknown \) -printf "%p %F\n" /opt btrfs root@trulla:~# root@trulla:~# btrfs subvolume list -o /opt ID 14930 gen 2276304 top level 259 path @/opt/.snapshot/2019-07-10_0000.daily ID 14957 gen 2277856 top level 259 path @/opt/.snapshot/2019-07-11_0000.daily ID 14981 gen 2279354 top level 259 path @/opt/.snapshot/2019-07-12_0000.daily ID 15005 gen 2280891 top level 259 path @/opt/.snapshot/2019-07-13_0000.daily ID 15052 gen 2283953 top level 259 path @/opt/.snapshot/2019-07-15_0000.daily ID 15064 gen 2284721 top level 259 path @/opt/.snapshot/2019-07-15_1200.hourly ID 15065 gen 2284788 top level 259 path @/opt/.snapshot/2019-07-15_1300.hourly root@trulla:~# stat -f -c %T /opt/.snapshot/2019-07-10_0000.daily btrfs -- Ullrich Horlacher Server und Virtualisierung Rechenzentrum TIK Universitaet Stuttgart E-Mail: horlacher@tik.uni-stuttgart.de Allmandring 30a Tel: ++49-711-68565868 70569 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/ REF:<20190712231705.GA16856@tik.uni-stuttgart.de>