From: Ulli Horlacher <framstag@rus.uni-stuttgart.de>
To: linux-btrfs@vger.kernel.org
Subject: btrfs subvolume list for not mounted filesystem?
Date: Mon, 18 Dec 2017 17:49:41 +0100 [thread overview]
Message-ID: <20171218164941.GA22020@rus.uni-stuttgart.de> (raw)
I want to mount an alternative subvolume of a btrfs filesystem.
I can list the subvolumes when the filesystem is mounted, but how do I
know them, when the filesystem is not mounted? Is there a query command?
root@xerus:~# mount | grep /test
/dev/sdd4 on /test type btrfs (rw,relatime,space_cache,user_subvol_rm_allowed,subvolid=5,subvol=/)
root@xerus:~# btrfs subvolume list /test
ID 258 gen 156 top level 5 path tux/zz
ID 259 gen 156 top level 5 path tux/z1
ID 260 gen 156 top level 5 path tmp/zz
ID 261 gen 19 top level 260 path tmp/zz/z1
ID 269 gen 156 top level 5 path tux/test
ID 271 gen 129 top level 269 path tux/test/.snapshot/2017-12-02_1341.test
root@xerus:~# umount /test
root@xerus:~# btrfs subvolume list /dev/sdd4
ERROR: not a btrfs filesystem: /dev/sdd4
ERROR: can't access '/dev/sdd4'
--
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:<20171218164941.GA22020@rus.uni-stuttgart.de>
next reply other threads:[~2017-12-18 16:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-18 16:49 Ulli Horlacher [this message]
2017-12-18 17:34 ` btrfs subvolume list for not mounted filesystem? Andrei Borzenkov
2022-08-16 11:54 ` Ulli Horlacher
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