linux-kernel - EINVAL on bulk access of CIFS mount

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Message-ID: <dodkxllnsozs4z3yzw5bgm35fs7t5fziwpvsczxpak2jqe6rvk@ebo364wns2dq>
Date: Wed, 12 Jun 2024 08:48:13 +0200
From: martin f krafft <madduck@...duck.net>
To: linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: EINVAL on bulk access of CIFS mount

Dear list,

I have a local CIFS mount on 6.8.9-amd64 (Debian unstable):

```
//fileserver/m on /server/m type cifs (rw,nosuid,nodev,relatime,vers=3.1.1,cache=strict,username=martin.krafft,domain=samba-ad,uid=1000,forceuid,gid=1000,forcegid,addr=192.168.231.42,file_mode=0660,dir_mode=02770,soft,nounix,mapposix,rsize=4194304,wsize=4194304,bsize=1048576,retrans=1,echo_interval=60,actimeo=1,closetimeo=1)
```

I am trying to tree-walk that mount (depth-first). Every couple of 
dozen files, I get EINVAL on file access. I modified my script to 
then wait a second and retry, and it generally works then, or on the 
next retry.

Accessing the same file directly (i.e. not as part of a bulk 
operation) works fine.

But also, restarting the bulk operation does seem to cause it to hit 
EINVAL on exactly the same files as before, though I am not 100% on 
that.

Access works fine from Windows, even in bulk, leading me to believe 
this is a cifs client-side problem.

How could I go about narrowing this down?

Thanks,

-- 
martin krafft | https://matrix.to/#/#madduck:madduck.net

"die menschen drängen sich zum lichte, nicht um besser zu sehen,
 sondern um besser zu glänzen."
                                                 - friedrich nietzsche
{: .blockquote }

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