From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ram Pai Subject: Re: Adding subroot information to /proc/mounts, or obtaining that through other means Date: Thu, 21 Jun 2007 09:20:37 -0700 Message-ID: <1182442837.3342.13.camel@ram.us.ibm.com> References: <467994BD.6000403@zytor.com> <20070620210343.GQ21478@ftp.linux.org.uk> <46799A31.10301@zytor.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: Al Viro , Linux Kernel Mailing List , linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, util-linux-ng-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: "H. Peter Anvin" Return-path: In-Reply-To: <46799A31.10301-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org> Sender: util-linux-ng-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-fsdevel.vger.kernel.org On Wed, 2007-06-20 at 14:20 -0700, H. Peter Anvin wrote: > Al Viro wrote: > > On Wed, Jun 20, 2007 at 01:57:33PM -0700, H. Peter Anvin wrote: > >> ... or, alternatively, add a subfield to the first field (which would > >> entail escaping whatever separator we choose): > >> > >> /dev/md6 /export ext3 rw,data=ordered 0 0 > >> /dev/md6:/users/foo /home/foo ext3 rw,data=ordered 0 0 > >> /dev/md6:/users/bar /home/bar ext3 rw,data=ordered 0 0 > > > > Hell, no. The first field is in principle impossible to parse unless > > you know the fs type. > > > > How about making a new file with sane format? From the very > > beginning. E.g. mountpoint + ID + relative path + type + options, > > where ID uniquely identifies superblock (e.g. numeric st_dev) > > and backing device (if any) is sitting among the options... > > Okay, I see there has been some discussion on this earlier, based on a > proposal by Ram Pai, so it pretty much comes down to redesigning this > right. I see some issues with his proposal (device numbers exported to > userspace in text form should be separated into major:minor form, for > one thing.) I know the util-linux-ng people have also had issues with > /proc/mounts that they would like resolved in order to finally nuke > /etc/mtab. > > Is Ram still working on this? I'd like to help make this happen so we > can be done with it. Peter, I am not working on it currently. But i am interested in getting it done. I have the seed set of patches which had Al Viro's ideas incorporated. Infact those patches were sent on lkml 2 months back. Shall we start with those patches? RP > > -hpa > >