Assaf Gordon <assafgordon@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Assaf Gordon <assafgordon@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Received: (at 28991) by debbugs.gnu.org; 26 Oct 2017 04:48:14 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Oct 26 00:48:14 2017 Received: from localhost ([127.0.0.1]:33831 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1e7a5W-00016s-LK for submit <at> debbugs.gnu.org; Thu, 26 Oct 2017 00:48:14 -0400 Received: from mail.magicbluesmoke.com ([82.195.144.49]:35058) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <P@HIDDEN>) id 1e7a5U-00016d-SL; Thu, 26 Oct 2017 00:48:13 -0400 Received: from localhost.localdomain (c-73-158-116-184.hsd1.ca.comcast.net [73.158.116.184]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.magicbluesmoke.com (Postfix) with ESMTPSA id 80ADD9C32; Thu, 26 Oct 2017 05:48:11 +0100 (IST) Subject: Re: bug#28991: df: wrong output when a FS masks another one To: Stephane Chazelas <stephane.chazelas@HIDDEN>, 28991 <at> debbugs.gnu.org, 28670 <at> debbugs.gnu.org References: <20171025145715.GE5071@HIDDEN> From: =?UTF-8?Q?P=c3=a1draig_Brady?= <P@HIDDEN> Message-ID: <35fc7d85-351d-f496-644b-0c78af40e105@HIDDEN> Date: Wed, 25 Oct 2017 21:48:09 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <20171025145715.GE5071@HIDDEN> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 28991 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: 0.0 (/) On 25/10/17 07:57, Stephane Chazelas wrote: > Test case: > > /tmp$ mkdir -p 1/2 > /tmp$ sudo mount -o size=1M -t tmpfs x 1/2 > /tmp$ sudo mount -o size=2M -t tmpfs y 1 > /tmp$ mkdir 1/2 > /tmp$ df -h 1/2 > Filesystem Size Used Avail Use% Mounted on > x 2.0M 0 2.0M 0% /tmp/1/2 > > The Size is correct as that's obtained from statfs() on the > file. But when it comes to finding the corresponding mount > source and mountpoint, it fails. > > /tmp$ grep /tmp/ /proc/mounts > x /tmp/1/2 tmpfs rw,relatime,size=1024k 0 0 > y /tmp/1 tmpfs rw,relatime,size=2048k 0 0 > > df should walk /proc/self/mounts or /etc/mtab from the bottom up > until it finds the first mount point that is a parent of the > realpath of the file. > > /tmp$ df --version > df (GNU coreutils) 8.28 > > (on Debian testing amd64) > > > Related: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=15955 > > That's just been discussed on the austin group mailing list: > https://www.mail-archive.com/austin-group-l@HIDDEN/msg01715.html > https://www.mail-archive.com/austin-group-l@HIDDEN/msg01720.html > > Not critical as that could be considered as a pathological test > case. > Yes it would be nice to behave more consistently here. Also related is https://bugs.gnu.org/28670 cheers, Pádraig
bug-coreutils@HIDDEN:bug#28991; Package coreutils.
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X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -4.0 (----) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -4.0 (----) Test case: /tmp$ mkdir -p 1/2 /tmp$ sudo mount -o size=1M -t tmpfs x 1/2 /tmp$ sudo mount -o size=2M -t tmpfs y 1 /tmp$ mkdir 1/2 /tmp$ df -h 1/2 Filesystem Size Used Avail Use% Mounted on x 2.0M 0 2.0M 0% /tmp/1/2 The Size is correct as that's obtained from statfs() on the file. But when it comes to finding the corresponding mount source and mountpoint, it fails. /tmp$ grep /tmp/ /proc/mounts x /tmp/1/2 tmpfs rw,relatime,size=1024k 0 0 y /tmp/1 tmpfs rw,relatime,size=2048k 0 0 df should walk /proc/self/mounts or /etc/mtab from the bottom up until it finds the first mount point that is a parent of the realpath of the file. /tmp$ df --version df (GNU coreutils) 8.28 (on Debian testing amd64) Related: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=15955 That's just been discussed on the austin group mailing list: https://www.mail-archive.com/austin-group-l@HIDDEN/msg01715.html https://www.mail-archive.com/austin-group-l@HIDDEN/msg01720.html Not critical as that could be considered as a pathological test case. -- Stephane
Stephane Chazelas <stephane.chazelas@HIDDEN>:bug-coreutils@HIDDEN.
Full text available.bug-coreutils@HIDDEN:bug#28991; Package coreutils.
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