From: Ulli Horlacher <framstag@rus.uni-stuttgart.de>
To: linux-btrfs@vger.kernel.org
Subject: nfs subvolume access?
Date: Wed, 10 Mar 2021 08:46:20 +0100 [thread overview]
Message-ID: <20210310074620.GA2158@tik.uni-stuttgart.de> (raw)
When I try to access a btrfs filesystem via nfs, I get the error:
root@tsmsrvi:~# mount tsmsrvj:/data/fex /nfs/tsmsrvj/fex
root@tsmsrvi:~# time find /nfs/tsmsrvj/fex | wc -l
find: File system loop detected; '/nfs/tsmsrvj/fex/spool' is part of the same file system loop as '/nfs/tsmsrvj/fex'.
1
root@tsmsrvi:~#
On tsmsrvj I have in /etc/exports:
/data/fex tsmsrvi(rw,async,no_subtree_check,no_root_squash)
This is a btrfs subvolume with snapshots:
root@tsmsrvj:~# btrfs subvolume list /data
ID 257 gen 35 top level 5 path fex
ID 270 gen 36 top level 257 path fex/spool
ID 271 gen 21 top level 270 path fex/spool/.snapshot/2021-03-07_1453.test
ID 272 gen 23 top level 270 path fex/spool/.snapshot/2021-03-07_1531.test
ID 273 gen 25 top level 270 path fex/spool/.snapshot/2021-03-07_1532.test
ID 274 gen 27 top level 270 path fex/spool/.snapshot/2021-03-07_1718.test
root@tsmsrvj:~# find /data/fex | wc -l
489887
root@tsmsrvj:~#
What must I add to /etc/exports to enable subvolume access for the nfs
client?
tsmsrvi and tsmsrvj (nfs client and server) both run Ubuntu 20.04 with
btrfs-progs v5.4.1
--
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:<20210310074620.GA2158@tik.uni-stuttgart.de>
next prev reply other threads:[~2021-03-10 7:55 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-13 3:53 any idea about auto export multiple btrfs snapshots? Wang Yugui
2021-03-10 7:46 ` Ulli Horlacher [this message]
2021-03-10 7:59 ` nfs subvolume access? Hugo Mills
2021-03-10 8:09 ` Ulli Horlacher
2021-03-10 9:35 ` Graham Cobb
2021-03-10 15:55 ` Ulli Horlacher
2021-03-10 17:29 ` Forza
2021-03-10 17:46 ` Ulli Horlacher
2021-03-10 8:17 ` Ulli Horlacher
2021-03-11 7:46 ` Ulli Horlacher
2021-07-08 22:17 ` cannot use btrfs for nfs server Ulli Horlacher
2021-07-09 0:05 ` Graham Cobb
2021-07-09 4:05 ` NeilBrown
2021-07-09 6:53 ` Ulli Horlacher
2021-07-09 7:23 ` Forza
2021-07-09 7:24 ` Hugo Mills
2021-07-09 7:34 ` Ulli Horlacher
2021-07-09 16:30 ` Chris Murphy
2021-07-10 6:35 ` Ulli Horlacher
2021-07-11 11:41 ` Forza
2021-07-12 7:17 ` Ulli Horlacher
2021-07-09 16:35 ` Chris Murphy
2021-07-10 6:56 ` Ulli Horlacher
2021-07-10 22:17 ` Chris Murphy
2021-07-12 7:25 ` Ulli Horlacher
2021-07-12 13:06 ` Graham Cobb
2021-07-12 16:16 ` Ulli Horlacher
2021-07-12 22:56 ` g.btrfs
2021-07-13 7:37 ` Ulli Horlacher
2021-07-19 12:06 ` Forza
2021-07-19 13:07 ` Forza
2021-07-19 13:35 ` Forza
2021-07-27 11:27 ` Ulli Horlacher
2021-07-09 16:06 ` Lord Vader
2021-07-10 7:03 ` Ulli Horlacher
[not found] ` <162632387205.13764.6196748476850020429@noble.neil.brown.name>
2021-07-15 14:09 ` [PATCH/RFC] NFSD: handle BTRFS subvolumes better Josef Bacik
2021-07-15 16:45 ` Christoph Hellwig
2021-07-15 17:11 ` Josef Bacik
2021-07-15 17:24 ` Christoph Hellwig
2021-07-15 18:01 ` Josef Bacik
2021-07-15 22:37 ` NeilBrown
2021-07-19 15:40 ` Josef Bacik
2021-07-19 20:00 ` J. Bruce Fields
2021-07-19 20:44 ` Josef Bacik
2021-07-19 23:53 ` NeilBrown
2021-07-19 15:49 ` J. Bruce Fields
2021-07-20 0:02 ` NeilBrown
2021-07-19 9:16 ` Christoph Hellwig
2021-07-19 23:54 ` NeilBrown
2021-07-20 6:23 ` Christoph Hellwig
2021-07-20 7:17 ` NeilBrown
2021-07-20 8:00 ` Christoph Hellwig
2021-07-20 23:11 ` NeilBrown
2021-07-20 22:10 ` J. Bruce Fields
2021-07-15 23:02 ` NeilBrown
2021-07-15 15:45 ` J. Bruce Fields
2021-07-15 23:08 ` NeilBrown
2021-06-14 22:50 ` any idea about auto export multiple btrfs snapshots? NeilBrown
2021-06-15 15:13 ` Wang Yugui
2021-06-15 15:41 ` Wang Yugui
2021-06-16 5:47 ` Wang Yugui
2021-06-17 3:02 ` NeilBrown
2021-06-17 4:28 ` Wang Yugui
2021-06-18 0:32 ` NeilBrown
2021-06-18 7:26 ` Wang Yugui
2021-06-18 13:34 ` Wang Yugui
2021-06-19 6:47 ` Wang Yugui
2021-06-20 12:27 ` Wang Yugui
2021-06-21 4:52 ` NeilBrown
2021-06-21 5:13 ` NeilBrown
2021-06-21 8:34 ` Wang Yugui
2021-06-22 1:28 ` NeilBrown
2021-06-22 3:22 ` Wang Yugui
2021-06-22 7:14 ` Wang Yugui
2021-06-23 0:59 ` NeilBrown
2021-06-23 6:14 ` Wang Yugui
2021-06-23 6:29 ` NeilBrown
2021-06-23 9:34 ` Wang Yugui
2021-06-23 23:38 ` NeilBrown
2021-06-23 15:35 ` J. Bruce Fields
2021-06-23 22:04 ` NeilBrown
2021-06-23 22:25 ` J. Bruce Fields
2021-06-23 23:29 ` NeilBrown
2021-06-23 23:41 ` Frank Filz
2021-06-24 0:01 ` J. Bruce Fields
2021-06-24 21:58 ` Patrick Goetz
2021-06-24 23:27 ` NeilBrown
2021-06-21 14:35 ` Frank Filz
2021-06-21 14:55 ` Wang Yugui
2021-06-21 17:49 ` Frank Filz
2021-06-21 22:41 ` Wang Yugui
2021-06-22 17:34 ` Frank Filz
2021-06-22 22:48 ` Wang Yugui
2021-06-17 2:15 ` Wang Yugui
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210310074620.GA2158@tik.uni-stuttgart.de \
--to=framstag@rus.uni-stuttgart.de \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.