[Samba] Truncated list of files/folders when using AWS EFS share

[Pednekar, Shirish]

Hello Samba Team,


I have Samba Server Version  4.14.5 installed on RHEL8 (REDHAT_SUPPORT_PRODUCT_VERSION="8.5")
Installed on an EC2 instance and the mount is an EFS. I can't list all the files/folders browsing from the windows client. The output varies depending on the client from which I am looking from.
However, if I share a local folder rather than an EFS, then I get consistent and correct results.

The writeup below refers the details on the AWS EFS dive only.

Config in samba.conf
---
[global]
        realm = SAMPLE.ORG
        workgroup = EXAM
        security = ads
        kerberos method = secrets and keytab
        template homedir = /home/%U
        idmap config * : backend = tdb
        idmap config * : range = 10000-199999
        idmap config EXAM : backend = sss
        idmap config EXAM : range = 200000-2147483647
        load printers = no
        machine password timeout = 0
        log level = 4
[data-robo]
        comment = AWS EFS share drive
        browseable = Yes
        read only = No
        write list = @group1, at group2
        public = No
        path = /data/robo2
        valid users = @group1, at group2
        force directory mode = 777

---


  *   There is a production folder with ~4210 files. As i listed on the shell on the samba box itself.

This is the log output when browsing from windows file explorer .. the number of files shown is 389

[2022/05/04 02:48:29.047315,  4] ../../source3/smbd/vfs.c:936(vfs_ChDir)
  vfs_ChDir to /data/Simulations2
[2022/05/04 02:48:29.048635,  3] ../../source3/smbd/smb2_server.c:3874(smbd_smb2_request_error_ex)
  smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[1] status[STATUS_NO_MORE_FILES] || at ../../source3/smbd/smb2_query_directory.c:160



  *   This is when listing from a mobaxterm  .. the number of files shown is 364

[2022/05/03 07:38:54.786180,  3] ../../source3/smbd/smb2_server.c:3874(smbd_smb2_request_error_ex)
  smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[1] status[STATUS_NO_MORE_FILES] || at ../../source3/smbd/smb2_query_directory.c:160
[2022/05/03 07:38:54.787453,  4] ../../source3/smbd/vfs.c:936(vfs_ChDir)
  vfs_ChDir to simulations/test_tmp
[2022/05/03 07:38:54.787493,  4] ../../source3/smbd/vfs.c:936(vfs_ChDir)



  *   I mapped the shared to a V: on windows box then went v: and performed a "dir" from dos prompt  .. the number of files shown is 478 File(s)

[2022/05/04 02:54:44.764868,  3] ../../source3/smbd/smb2_server.c:3874(smbd_smb2_request_error_ex)
  smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[1] status[STATUS_NO_MORE_FILES] || at ../../source3/smbd/smb2_query_directory.c:160



  *   This is when listed from a powershell on the same windows box   .. the number of files shown is 24

[2022/05/04 02:53:46.623643,  3] ../../source3/smbd/smb2_server.c:3874(smbd_smb2_request_error_ex)
  smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[1] status[STATUS_NO_MORE_FILES] || at ../../source3/smbd/smb2_query_directory.c:160

Another test was ,
If I create a wew subfolders and then create say 500 files/folders there , about 350 show up. But all can be accessed if I give the complete address in the windows explorer.
If I create 350, then all show up. If I create the 351st folder, then one gets randomly invisible but it can be accessed if I give the complete address in the windows explorer.
If I delete the 351st dir, then the other 350 show up correctly.
If I create another subfolder, maybe 200 will show up, so this number may be random.

Greatly appreciate your assistance.

Many thanks for your help,
Shirish