This bug was fixed in the package zfs-linux - 0.7.5-1ubuntu13
---------------
zfs-linux (0.7.5-1ubuntu13) bionic; urgency=medium
* Allow multiple mounts of zfs datasets (LP: #1759848)
- Change zpl_mount() to call sget() directly with it's own test
callback. Passing the objset_t object as the fs data allows
checking if a superblock already exists for the dataset, and in
that case we just need to return a new reference for the sb's
root dentry.
-- Colin Ian King <colin.k...@canonical.com> Thu, 29 Mar 2018 13:58:22
+0100
** Changed in: zfs-linux (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1759848
Title:
Allow multiple mounts of zfs datasets
Status in linux package in Ubuntu:
Incomplete
Status in zfs-linux package in Ubuntu:
Fix Released
Bug description:
Pull upstream fix https://trello.com/c/l89Ygj28/352-allow-multiple-
mounts-of-zfs-datasets to allow multiple mounts
An attempt to mount an already mounted zfs dataset should return a new
mount referencing the existing super block, but instead it returns an
error. Operations such as bind mounts and unsharing mount namespaces
create new mounts for the sb, which can cause operations to fail which
involve unmounting and remounting the dataset. This fix from Seth
addresses this issue
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