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Date:   Wed, 10 Jul 2019 13:20:49 +0200 (CEST)
From:   "Mkrtchyan, Tigran" <tigran.mkrtchyan@desy.de>
To:     John Dorminy <jdorminy@redhat.com>
Cc:     linux-nfs <linux-nfs@vger.kernel.org>
Message-ID: <676688269.16845251.1562757649858.JavaMail.zimbra@desy.de>
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Subject: Re: Request for help debugging readdirplus malfunction on NFS v3
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Thread-Topic: Request for help debugging readdirplus malfunction on NFS v3
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Hi Dorminy,

there are fixes form Trond that possibly address your issues. Did you
have tried them?

https://www.spinics.net/lists/linux-nfs/msg73754.html

Regards,
   Tigran.

----- Original Message -----
> From: "John Dorminy" <jdorminy@redhat.com>
> To: "linux-nfs" <linux-nfs@vger.kernel.org>
> Sent: Wednesday, July 10, 2019 12:11:46 PM
> Subject: Request for help debugging readdirplus malfunction on NFS v3

> Greetings;
> 
> In the lab for the group I'm in, we have three NFS servers each
> serving different parts of our shared filesystem. However, as of
> kernel 5.1 or so on the clients, the clients have ceased working: a
> 'ls' on any directory within one mountpoint (the only one hosted on
> one server) fails to show any files.
> 
> The mount is:
> nfs-02:/nbu1 on /p/not-backed-up type nfs
> (rw,noatime,vers=3,rsize=65536,wsize=65536,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.19.119.4,mountvers=3,mountport=4048,mountproto=udp,local_lock=none,addr=10.19.119.4)
> 
> Bisection on the client side indicates
> be4c2d4723a4a637f0d1b4f7c66447141a4b3564 is the commit at which this
> mountpoint ceases to work. `rpcdebug -m nfs -s all` results in the
> following going to dmesg:
> [10146.723030] NFS call  readdirplus 162
> [10146.724908] NFS reply readdirplus: -2
> [10146.725429] NFS: readdir(/) returns -2
> 
> I'm somewhat out of ideas; are there other tools I should be using to
> hunt this down, short of adding print statements? and is this a known
> bug already?
> 
> Thanks in advance!
> 
> John Dorminy