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SubjectRe: [RFC PATCH] io_uring: add support for IORING_OP_GETDENTS64
Hi,

On 2021-01-24 01:59:05 +0000, Al Viro wrote:
> On Sat, Jan 23, 2021 at 03:50:55PM -0800, Andres Freund wrote:
>
> > As there's only a shared lock, seems like both would end up with the
> > same ctx->pos and end up updating f_pos to the same offset (assuming the
> > same count).
> >
> > Am I missing something?
>
> This:
> f = fdget_pos(fd);
> if (!f.file)
> return -EBADF;
> in the callers.

Ah. Thanks for the explainer, userspace guy here ;). I hadn't realized
that fdget_pos acquired a lock around the position...

Regards,

Andres

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