Description of problem:

When attempting to import the fs plugin, sample script fails.  Same import with lvm plugin succeeds.

Version-Release number of selected component (if applicable):

[root@localhost libblockdev]# rpm -qa | grep blockdev
libblockdev-utils-2.19-6.el8.x86_64
libblockdev-fs-2.19-6.el8.x86_64
libblockdev-nvdimm-2.19-6.el8.x86_64
libblockdev-kbd-2.19-6.el8.x86_64
libblockdev-mdraid-2.19-6.el8.x86_64
libblockdev-2.19-6.el8.x86_64
libblockdev-lvm-2.19-6.el8.x86_64
libblockdev-part-2.19-6.el8.x86_64
libblockdev-loop-2.19-6.el8.x86_64
libblockdev-vdo-2.19-6.el8.x86_64
libblockdev-swap-2.19-6.el8.x86_64
libblockdev-dm-2.19-6.el8.x86_64
python3-blockdev-2.19-6.el8.x86_64
libblockdev-crypto-2.19-6.el8.x86_64
libblockdev-mpath-2.19-6.el8.x86_64
libblockdev-plugins-all-2.19-6.el8.x86_64

Steps to Reproduce:

Script contents:
================

[root@localhost libblockdev]# cat sample_script.py 
#!/usr/bin/python3

import sys
import os

import gi
gi.require_version("GLib", "2.0")
gi.require_version("BlockDev", "2.0")

from gi.repository import GLib
from gi.repository import BlockDev as bd

REQUESTED_PLUGIN_NAMES = {"fs"}

requested_plugins = bd.plugin_specs_from_names(REQUESTED_PLUGIN_NAMES)

try:
    succ_ = bd.init(requested_plugins)
except GLib.GError as err:
    raise RuntimeError("Failed to initialize libbd and its plugins (%s)" % REQUESTED_PLUGIN_NAMES)

Execution failure:
==================

[root@localhost libblockdev]# ./sample_script.py 

** (process:31170): WARNING **: 17:53:59.004: The 'ntfscluster' utility is not available
The 'ntfslabel' utility is not available
The 'ntfsresize' utility is not available
The 'ntfsfix' utility is not available
The 'mkntfs' utility is not available
Traceback (most recent call last):
  File "./sample_script.py", line 18, in <module>
    succ_ = bd.init(requested_plugins)
  File "/usr/lib64/python3.6/site-packages/gi/overrides/BlockDev.py", line 91, in init
    return _init(require_plugins, log_func)
GLib.Error: g-bd-init-error-quark: Failed to load plugins (0)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./sample_script.py", line 20, in <module>
    raise RuntimeError("Failed to initialize libbd and its plugins (%s)" % REQUESTED_PLUGIN_NAMES)
RuntimeError: Failed to initialize libbd and its plugins ({'fs'})

lvm plugin works fine:
======================

[root@localhost libblockdev]# sed -i 's/"fs"/"lvm"/g' sample_script.py 
[root@localhost libblockdev]# ./sample_script.py 

Actual results:

fs Plugin import fails

Expected results:

fs Plugin import should succeed

Additional Info:

Sample script structure taken from https://github.com/storaged-project/api-examples/blob/master/demo-1-libblockdev-python