On Thu, 12 Aug 2021 at 07:46, Jeffle Xu <[email protected]> wrote:
>
> From: Liu Bo <[email protected]>
>
> When 'no_open' is used by virtiofsd, guest kernel won't send OPEN request
> any more.  However, with atomic_o_trunc, SETATTR request is also omitted in
> OPEN(O_TRUNC) so that the backend file is not truncated.  With a following
> GETATTR, inode size on guest side is updated to be same with that on host
> side, the end result is that O_TRUNC semantic is broken.
>
> This disables atomic_o_trunc as well if with no_open.

I don't quite get it why one would want to enable atomic_o_trunc with
no_open in the first place?

Thanks,
Miklos

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