Re: [PATCH v4] flock.2: add CIFS details

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Sure. Thanks!

I would put more details from
https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-lockfileex
:

"""
  Another important side-effect is that the locks are not advisory anymore:
  any IO on an exclusively locked file will always fail with EACCES
  when done from a separate file descriptor; write calls on
  a file locked for shared access will fail with EACCES when done
  from any file descriptor including the one used to lock the file.
"""

Thoughts?

--
Best regards,
Pavel Shilovsky

вт, 16 мар. 2021 г. в 03:42, Aurélien Aptel <aaptel@xxxxxxxx>:
>
> Pavel Shilovsky <piastryyy@xxxxxxxxx> writes:
> > It is not only about writing to a locked file. It is also about any IO
> > against a locked file if such a file is locked through another file
> > handle. Right?
>
> Yes that was implied, the write was a simple example to illustrate. I'll
> update to make it more generic:
>
>   Another important side-effect is that the locks are not advisory anymore:
>   any IO on a locked file will always fail with EACCES,
>   even when done from a separate file descriptor.
>
> If you have comments please provide direct text suggestion to save time.
>
> 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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