RE: [Dazuko-help] Twice call for dazukofs_release

[Nil Nik]

It works fine...Thanks.

> CC: address@hidden
> To: address@hidden
> Subject: Re: [Dazuko-help] Twice call for dazukofs_release
> From: address@hidden
> Date: Fri, 22 Oct 2010 16:37:11 +0200
>
> On 2010-10-22, Nil Nik <address@hidden> wrote:
> >> If you want to track closes, you will probably want to add a new
> >> DazukoFS command to close the file descriptor. This will allow
> >> DazukoFS to again place the registered process on the "mask list",
> >> close the file descriptor, and then remove the process from the
> >> "mask list". It is important that a process is not on the "mask
> >> list" while in userspace.
> >
> > Can you elaborate 'new DazukoFS command to close the file
> > descriptor'? How can i do this?
>
> Actually, now that I've looked at the libdazukofs code again, you
> wouldn't need to add a new DazukoFS command.
>
> Right now libdazukofs (userspace) closes the file descriptor that was
> opened by DazukoFS. You can see that in:
>
> dazukofs.c:dazukofs_return_access()
>
> It does this just before writing to the DazukoFS group device (to
> report the access response).
>
> Rather than libdazukofs closing the file descriptor, you could have
> DazukoFS do it, for example in:
>
> event.c:dazukofs_return_event()
>
> The closing of the file descriptor would need to be wrapped with
> mask/unmask calls to make sure the closing does not trigger another
> CLOSE event. It would look something like this:
>
> mask_proc(&proc);
> sys_close(fd);
> if (proc.within_list)
> check_recursion();
>
> (This is the same thing that is done to wrap dentry_open() to protect
> against recursive OPEN events.)
>
> John Ogness
>
> --
> Dazuko Maintainer