Comment 13 for bug 2002394

Reviewed: https://review.opendev.org/c/openstack/manila/+/874500
Committed: https://opendev.org/openstack/manila/commit/3d6fcc99458b07fa6f8e2983038a8c035b6dc98a
Submitter: "Zuul (22348)"
Branch: stable/yoga

commit 3d6fcc99458b07fa6f8e2983038a8c035b6dc98a
Author: silvacarloss <email address hidden>
Date: Tue Jan 24 11:49:14 2023 -0300

    [Cephfs] Fix erroneous share mode override on ensure_shares

    In order to ensure that a share existed, we used to send the same
    request to Ceph as we would do with the share creation. In that
    request, we will set the share mode, which is a value set by
    the deployer through the `cephfs_volume_mode` config option.

    If the share was already created, Ceph would not override the value
    we were forwarding for the permission mode. After a bugfix [1], the
    value of mode started being reinforced when sent, even if the
    subvolume was already created. If the value for
    `cephfs_volume_mode` changed after the share was created, the mode
    is now being overwritten after manila startup on ensure_shares.

    Fixed this issue by modifying the ensure_shares to only confirm if
    the export exists.

    [1] https://tracker.ceph.com/issues/54375

    Closes-Bug: #2002394
    Change-Id: Ic5b5b42b882ce1346b4b46d1b29aa31740933e0e
    (cherry picked from commit c61c1977c25e151fd2839febd08a7fdac6b1f7b8)
    (cherry picked from commit f8d0e0cad271baaac0f86aa3fe156272deabb48e)