On Tue 2017-08-22 (12:40), Hugo Mills wrote: > On Tue, Aug 22, 2017 at 02:23:50PM +0200, Ulli Horlacher wrote: > > > How do I find the root filesystem of a subvolume? > > Example: > > > > root@fex:~# df -T > > Filesystem Type 1K-blocks Used Available Use% Mounted on > > - - 1073740800 104244552 967773976 10% /local/.backup/home > > I've never seen the "- -" output from df before. Is this a bind > mount or something? No, /local/.backup/home is just a btrfs subvolume > > I know, the root filesystem is /local, but who can I show it by command? > > Probably in /proc/self/mountinfo root@fex:~# grep home /proc/self/mountinfo root@fex:~# grep btrfs /proc/self/mountinfo 31 22 0:23 / /backup rw,relatime - btrfs /dev/sdf1 rw,compress=zlib,space_cache 32 22 0:26 / /local rw,relatime - btrfs /dev/sde1 rw,compress=zlib,space_cache No information about the subvolume /local/.backup/home It seems, I have to scan the subvolume path upwards until I found a real mount point, -- Ullrich Horlacher Server und Virtualisierung Rechenzentrum TIK Universitaet Stuttgart E-Mail: horlacher@xxxxxxxxxxxxxxxxxxxx Allmandring 30a Tel: ++49-711-68565868 70569 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/ REF:<20170822124036.GA32302@xxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
