Documentation update for POSIX and NFSv4 ACLs support (#147)

content/docs/csidriver/features/powerstore.md

@@ -576,6 +576,32 @@ parameters:
 
 > The 1.4 version and later of the driver also enables any container user, to have full access to provisioned NFS volume, in earlier versions only `root` user had access
 
+
+## POSIX and NFSv4 ACLs 
+
+CSI PowerStore driver version 2.2.0 and later allows users to set user-defined permissions on NFS target mount directory using POSIX mode bits or NFSv4 ACLs. 
+
+NFSv4 ACLs are supported for NFSv4 shares on NFSv4 enabled NAS servers only. Please ensure the order when providing the NFSv4 ACLs. 
+
+To use this feature, provide permissions in `nfsAcls` parameter in values.yaml, secrets or NFS storage class. 
+
+For example: 
+
+1. POSIX mode bits
+
+```yaml
+nfsAcls: "0755"
+```
+
+2. NFSv4 ACLs 
+
+```yaml
+nfsAcls: "A::OWNER@:rwatTnNcCy,A::GROUP@:rxtncy,A::EVERYONE@:rxtncy,A::[email protected]:rxtncy"
+``` 
+
+If no values are specified, default value of "0777" is set.
+
+
 ## Dynamic Logging Configuration
 
 This feature is introduced in CSI Driver for PowerStore version 2.0.0. 

content/docs/csidriver/installation/helm/powerstore.md

@@ -141,6 +141,8 @@ CRDs should be configured during replication prepare stage with repctl as descri
     - *isDefault*: defines if we should treat the current array as a default.
     - *blockProtocol*: defines what SCSI transport protocol we should use (FC, ISCSI, None, or auto).
     - *nasName*: defines what NAS should be used for NFS volumes.
+    - *nfsAcls* (Optional): defines permissions - POSIX or NFSv4 ACLs, to be set on NFS target mount directory.
+	             NFSv4 ACls are supported for NFSv4 shares on NFSv4 enabled NAS servers only . 
 
     Add more blocks similar to above for each PowerStore array if necessary. 
 5. Create storage classes using ones from `samples/storageclass` folder as an example and apply them to the Kubernetes cluster by running `kubectl create -f <path_to_storageclass_file>`
@@ -156,6 +158,7 @@ CRDs should be configured during replication prepare stage with repctl as descri
 | externalAccess | Defines additional entries for hostAccess of NFS volumes, single IP address and subnet are valid entries | No | " " |
 | kubeletConfigDir | Defines kubelet config path for cluster | Yes | "/var/lib/kubelet" |
 | imagePullPolicy | Policy to determine if the image should be pulled prior to starting the container. | Yes | "IfNotPresent" |
+| nfsAcls | Defines permissions - POSIX or NFSv4 ACLs, to be set on NFS target mount directory. | No | "0777" |
 | connection.enableCHAP   | Defines whether the driver should use CHAP for iSCSI connections or not | No | False |
 | controller.controllerCount     | Defines number of replicas of controller deployment | Yes | 2 |
 | controller.volumeNamePrefix | Defines the string added to each volume that the CSI driver creates | No | "csivol" |