topic Re: VB.net developer looking to manage CIFS shares via a console app in Microsoft Virtualization Discussions

VB.net developer looking to manage CIFS shares via a console app

Runnindave — Wed, 04 Jun 2025 09:59:22 GMT

As a VB.net developer I need to be able to manage remote SMB\CIFS shares on a Netapp array. All I want to do initially is set an existing share that contains a single ACE of Authenticated Users with Full access, to Read Only.

All of the microsoft objects and methods can manage ACLs in the sub folders of the share, but the main share seems off limits since it exists on the Netapp array.

Is there a way to manage these shares using .net framework? Is there an API that I can install that will allow me to code the solution in Visual Studio and ideally in VB.net?

Re: VB.net developer looking to manage CIFS shares via a console app

mbeattie — Thu, 23 Jun 2022 04:39:19 GMT

Hi Dave,

You can set the ACL of the share during provisioning using the REST API

https://library.netapp.com/ecmdocs/ECMLP2876964/html/index.html#/NAS/cifs_share_create

Which version of ONTAP are you using? If you are using an older version you can use the NMSDK.

The ZAPI you are looking for is "cifs-share-access-control-modify". The XML syntax is:

<?xml version="1.0" encoding="UTF-8"?> <netapp xmlns="http://www.netapp.com/filer/admin" version="1.0"> <cifs-share-access-control-modify> <permission></permission> <share></share> <user-group-type></user-group-type> <user-or-group></user-or-group> <winsid></winsid> </cifs-share-access-control-modify> </netapp>

Here's a C# example:

using System; using System.Text; using System.Collections.Generic; using NetApp.Manage; namespace NetApp.NMSDK.Example { class ApiClient { static void Main(string[] args) { try { NaServer s = new NaServer("cluster1.testlab.local", 1 , 0); s.ServerType = NaServer.SERVER_TYPE.FILER; s.TransportType = NaServer.TRANSPORT_TYPE.HTTPS; s.Port = 443; s.Style = NaServer.AUTH_STYLE.LOGIN_PASSWORD; s.SetAdminUser("admin", "<password>"); NaElement api = new NaElement("cifs-share-access-control-modify"); api.AddNewChild("permission","<permission>"); api.AddNewChild("share","<share>"); api.AddNewChild("user-group-type","<user-group-type>"); api.AddNewChild("user-or-group","<user-or-group>"); api.AddNewChild("winsid","<winsid>"); NaElement xo = s.InvokeElem(api); Console.WriteLine(xo.ToPrettyString("")); } catch (NaAuthException e) { Console.Error.WriteLine("Authorization Failed: " + e.Message); } catch (NaApiFailedException e) { Console.Error.WriteLine("API FAILED: " + e.Message); } catch (Exception e) { Console.Error.WriteLine(e.Message); } } } }

Does that help?

/Matt

Re: VB.net developer looking to manage CIFS shares via a console app

Runnindave — Thu, 23 Jun 2022 13:23:32 GMT

Thanks Matt for the reply...

One thing you said makes me a little worried.

"You can set the ACL of the share during provisioning using the REST API"

Am I not able to modify the existing ACL on an already provisioned share?

Im using the Ontap 9.8.0 with Powershell currently. No problem creating the share and setting the Authenticated users to Modify, the problem now is setting the existing share to READ.

Do you have any examples of using the REST API to modify existing shares?

Re: VB.net developer looking to manage CIFS shares via a console app

mbeattie — Thu, 23 Jun 2022 23:12:13 GMT

Hi Dave,

You can modify the CIFS Share ACL using this PowerShell cmdlet:

PS C:\> get-help Set-NcCifsShareAcl NAME Set-NcCifsShareAcl SYNOPSIS Set the permissions for a user or group on a defined CIFS share. SYNTAX Set-NcCifsShareAcl [-Share] <String> [-UserOrGroup] <String> [-Permission] <String> [-UserGroupType <String>] [-Winsid <String>] [-VserverContext <String>] [-Controller <NcController[]>] [-InformationAction <ActionPreference>] [-InformationVariable <String>] [-PipelineVariable <String>] [-ZapiRetryCount <Int32>] [<CommonParameters>] DESCRIPTION Set the permissions for a user or group on a defined CIFS share.

There is also an equivalent REST API for modifying the CIFS share ACL available from ONTAP 9.6:

/protocols/cifs/shares/{svm.uuid}/{share}/acls/{user_or_group}/{type}

https://library.netapp.com/ecmdocs/ECMLP2876964/html/index.html#/NAS/cifs_share_acl_modify

The links to the previous ZAPI's were only if you were running an old version of ONTAP prior to 9.6

Hope this helps

/Matt

Re: VB.net developer looking to manage CIFS shares via a console app

mbeattie — Fri, 24 Jun 2022 01:18:49 GMT

Hi Dave,

Here is an example of modifying an ACL for an existing share using the REST API

$Credential = Get-Credential -Credential "admin" $Cluster = "cluster1.testlab.local" $Vserver = "vserver1" $share = "share1" $group = "Authenticated Users" $type = "windows" $permission = "change" $auth = [System.Convert]::ToBase64String([System.Text.Encoding]::UTF8.GetBytes($Credential.UserName + ':' + $Credential.GetNetworkCredential().Password)) $headers = @{ "Authorization" = "Basic $auth" "Accept" = "application/json" "Content-Type" = "application/json" } $uri = "https://$cluster/api/svm/svms?name=$vserver" $result = Invoke-RestMethod -Method Get -Uri $uri -Headers $headers $uuid = $result.records.uuid $uri = "https://$cluster/api/protocols/cifs/shares/$uuid/$share/acls/$group/$type" $body = @{"permission" = "$permission"} | ConvertTo-Json $result = Invoke-RestMethod -Method Patch -Uri $uri -Body $body -Headers $headers

Hope that helps

/Matt

Re: VB.net developer looking to manage CIFS shares via a console app

Runnindave — Fri, 24 Jun 2022 13:06:57 GMT

I was able to modify the Authenticated Users ACE to READ using the powershell example. One thing that was a problem is the group that I entered was "Authenticated users" and it would not apply the Set command. However, when I changed the group param to NT Authority\Authenticated Users the ACE was modified to READ.

Just in case someone hits a wall like this,

Thanks for your assistance with this.