From:   Rick Macklem <rmacklem@uoguelph.ca>
To:     "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>
Subject: knfsd server returns writeverf of all 0 bits (but was not rebooted)
Thread-Topic: knfsd server returns writeverf of all 0 bits (but was not
 rebooted)
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Date:   Thu, 9 Dec 2021 23:15:54 +0000
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Hi,=0A=
=0A=
When testing against the knfsd in a Linux 5.15.1 kernel, I received a=0A=
write reply with FILE_SYNC and a writeverf of all 0 bytes.=0A=
(Previous write verifiers were not all 0 bytes.)=0A=
=0A=
The server seemed to be functioning normally and had not rebooted.=0A=
=0A=
Is this intended behaviour?=0A=
=0A=
Normally I would not expect the writeverf in a Write operation reply=0A=
to change unless the server had rebooted, but I can see there might=0A=
be circumstances where the knfsd server wants all non-FILE_SYNC=0A=
writes to be redone by the client and would choose to change the=0A=
writeverf.=0A=
However, changing it to all 0 bytes seems particularly odd?=0A=
=0A=
rick=