Re: [PATCH] cifs: ignore FL_FLOCK locks in read/write

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Agree - given the differences between semantics with and without POSIX
extensions we should document limitations that the CIFS client has in
respect to locking including flock, posix locks and ofd locks.
--
Best regards,
Pavel Shilovsky

ср, 24 февр. 2021 г. в 03:11, Aurélien Aptel <aaptel@xxxxxxxx>:
>
> Pavel Shilovsky <piastryyy@xxxxxxxxx> writes:
> > If a flock is emulated on the server side with mandatory locks (which
> > is what we only have for SMB2 without POSIX extensions) then we should
> > maintain the same logic on the client. Otherwise you get different
> > behavior depending on the caching policies currently in effect on the
> > client side. You may consider testing with both modes when
> > leases/oplocks are on and off.
>
> Hm.. you're right, the write will fail on the server side without
> cache.
>
> I guess we should document current cifs behaviour in the flock man page.
>
> Cheers,
> --
> Aurélien Aptel / SUSE Labs Samba Team
> GPG: 1839 CB5F 9F5B FB9B AA97  8C99 03C8 A49B 521B D5D3
> SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg, DE
> GF: Felix Imendörffer, Mary Higgins, Sri Rasiah HRB 247165 (AG München)
>




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