[PATCH 2 of 3] lock: add ability to store additional metadata on filesytem

[Bryan O'Sullivan]

On Mon, Mar 20, 2017 at 12:49 AM, Phil Cohen <phillco at fb.com> wrote:


> @@ -248,6 +253,7 @@
>
                 if not self._parentheld:
>                      try:
>                          self.vfs.unlink(self.f)
> +                        self.vfs.unlink(self.f + '.info')
>                      except OSError:
>                          pass
>

This unlink ordering introduces a race condition, where one process can
delete a .info file owned by another.
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