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: horlac...@tik.uni-stuttgart.de Allmandring 30a Tel: ++49-711-68565868 70569 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/ REF:<20210310074620.ga2...@tik.uni-stuttgart.de>
