Description of problem:
When creating 2 inline volume pods using the same iscs volume withe readOnly=false, the second pod can not run for "MountVolume.WaitForAttach failed for volume "iscsi" : iscsi: create /var/lib/kubelet/plugins/kubernetes.io/iscsi/iface-172.30.63.54:3260:iscsi/172.30.63.54:3260-iqn.2016-04.test.com:storage.target00-lun-0/iscsi.json err open /var/lib/kubelet/plugins/kubernetes.io/iscsi/iface-172.30.63.54:3260:iscsi/172.30.63.54:3260-iqn.2016-04.test.com:storage.target00-lun-0/iscsi.json: read-only file system"

Version-Release number of selected component (if applicable):
4.5.0-0.nightly-2020-05-19-041951

How reproducible:
Always

Steps to Reproduce:
1. Create a inline iscsi volume pod with readOnly=false.
2. Delete this pod
3. Create 2 inline volume pods using the same iscsi volume with readOnly=true.


Actual results:
The second readonly pod did not run successfully, and report err msg:
"MountVolume.WaitForAttach failed for volume "iscsi" : iscsi: create /var/lib/kubelet/plugins/kubernetes.io/iscsi/iface-172.30.63.54:3260:iscsi/172.30.63.54:3260-iqn.2016-04.test.com:storage.target00-lun-0/iscsi.json err open /var/lib/kubelet/plugins/kubernetes.io/iscsi/iface-172.30.63.54:3260:iscsi/172.30.63.54:3260-iqn.2016-04.test.com:storage.target00-lun-0/iscsi.json: read-only file system"

Expected results:
The second readonly pod runs successfully.

Master Log:

Node Log (of failed PODs):

PV Dump:

PVC Dump:

StorageClass Dump (if StorageClass used by PV/PVC):

Additional info:
Inline volume pod we used:
{
    "apiVersion": "v1",
    "kind": "Pod",
    "metadata": {
        "name": "iscsi"
    },
    "spec": {
        "containers": [
            {
                "name": "iscsi",
                "image": "quay.io/openshifttest/storage@sha256:a05b96d373be86f46e76817487027a7f5b8b5f87c0ac18a246b018df11529b40",
                "securityContext": {
                    "privileged": true
                },
                "imagePullPolicy": "IfNotPresent",
                "volumeMounts": [
                    {
                        "mountPath": "/mnt/iscsi",
                        "name": "iscsi"
                    }
                ]
            }
        ],
        "volumes": [
            {
                "name": "iscsi",
                "iscsi": {
                    "targetPortal": "#POD_IP#:3260",
                    "iqn": "iqn.2016-04.test.com:storage.target00",
                    "lun": 0,
                    "iface": "default",
                    "fsType": "ext4",
                    "readOnly": true
                }
            }
        ]
    }
}