Easy enough fix, see this patch:

https://review.gerrithub.io/c/ffilz/nfs-ganesha/+/470892

Note that with V2.8 out and V2.9 coming soon, we will not be doing any updates to V2.7-stable branch. It’s strongly recommended that you move to V2.8.2 or later.

Thanks

Frank

From: Rungta, Vandana [mailto:vrungta@amazon.com]
Sent: Wednesday, October 9, 2019 1:46 PM
To: devel@lists.nfs-ganesha.org
Subject: [NFS-Ganesha-Devel] RHEL 7.2 clients cannot use NFS 4.1 to Nfs Ganesha 2.7.6 shares

Hello,

With Nfs Ganesha 2.7.6 when we use

NFS clients on older kernels ( RHEL 7.2 – 3.10.0-327.el7.x86_64 )

to mount a share using NFS vers=4.1 all file operations fail. 

Clients can navigate directories, but cannot read/write data to any file. 

Open fails because the older kernel cannot handle OPEN_DELEGATE_NONE_EXT specified in the Open response. 

If OPEN_DELEGATE_NONE_EXT was returned only when OPEN4_SHARE_ACCESS_WANT_XXX was specified, then we could be backwards compatible.

With Nfs Ganesha 2.5.x ( no delegation support), NFS clients on the older kernels can successfully mount and use the share with NFS vers 4.1

( Also reported here:  https://lists.nfs-ganesha.org/archives/list/devel@lists.nfs-ganesha.org/thread/63NZSYEMJK5CXMYT7AZFULUES6SMQ3RN/ )

Thoughts?

Thanks,

Vandana