[Samba] Random EINVAL when opening files with SMB3 POSIX extensions enabled

[Ralph Boehme]

On 11/26/24 11:03 PM, Andrew Gunnerson via samba wrote:
> I recently tried enabling SMB3 POSIX extensions as I'm only using Linux clients
> and would like to make use of the standard unix permission bits. However, I'm
> running into an issue where a simple `cat` fails with -EINVAL when opening the
> file:
> 
>      openat(AT_FDCWD, "Shells.txt", O_RDONLY) = -1 EINVAL (Invalid argument)
> 
> The weird thing is that it's intermittent. It'll fail with EINVAL many times in
> a row and then suddenly work and then start failing again.

can you grab a network trace when it happens?

<https://wiki.samba.org/index.php/Capture_Packets#Tracing_SMB_traffic_of_a_specific_client>

Beware that SMB3 POSIX Extensions are still under active development and 
I would recommend not using them in production right now because of bugs 
in Samba and cifs.ko.

-slow

-- 
SerNet Samba Team Lead https://sernet.de/
Samba Team Member      https://samba.org/
SAMBA+ packages       https://samba.plus/
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