Description of problem:
===============

In version 8.0, the creation of NFS-Ganesha exports directly on the CephFS filesystem through the dashboard should be restricted (https://jsw.ibm.com/browse/ISCE-760). Users should not be permitted to create NFS exports directly on the CephFS filesystem.

Export created from Dashboard
=============

[ceph: root@ceph-auto-cluster-qwoqln-node1-installer /]# ceph nfs cluster ls
[
  "nfsganesha"
]
[ceph: root@ceph-auto-cluster-qwoqln-node1-installer /]# ceph nfs export ls nfsganesha
[
  "/ganesha"
]
[ceph: root@ceph-auto-cluster-qwoqln-node1-installer /]# ceph nfs export info nfsganesha /ganesha
{
  "access_type": "RW",
  "clients": [],
  "cluster_id": "nfsganesha",
  "export_id": 1,
  "fsal": {
    "fs_name": "cephfs",
    "name": "CEPH",
    "user_id": "nfs.nfsganesha.1"
  },
  "path": "/",
  "protocols": [
    3,
    4
  ],
  "pseudo": "/ganesha",
  "security_label": false,
  "squash": "no_root_squash",
  "transports": [
    "TCP",
    "UDP"
  ]
}

****Dashboard screenshot attached



Version-Release number of selected component (if applicable):
=============================================================
# ceph --version
ceph version 19.1.0-17.el9cp (c4a94422523bb32232df641cbb7125f05a5b49f2) squid (rc)


How reproducible:
==============
Always


Steps to Reproduce:
==================
1. Create NFS service via Dashboard
2. From Dashboard, Create export directly on cephFS filesystem  


Actual results:
=============
Export directly out of cephFS filesystem is created


Expected results:
============
Export creation should only be allowed over subvolume not on filesystem directly


Additional info: