svn commit: r197240 - in head/sys: kern sys

[Kostik Belousov]

On Wed, Sep 16, 2009 at 03:15:57AM +0000, Stacey Son wrote:
> Author: sson
> Date: Wed Sep 16 03:15:57 2009
> New Revision: 197240
> URL: http://svn.freebsd.org/changeset/base/197240
> 
> Log:
>   Add optional touch event filter hooks to kevents.
>   
>   The touch event filter is called when a kernel event data is possibly
>   updated.  There are two hook points.  First, during a kevent() system
>   call.  Second, when an event has been triggered.
>   
>   Approved by:	rwatson (co-mentor)
> 
> Modified:
>   head/sys/kern/kern_event.c
>   head/sys/sys/event.h
> 
> Modified: head/sys/sys/event.h
> ==============================================================================
> --- head/sys/sys/event.h	Tue Sep 15 22:46:06 2009	(r197239)
> +++ head/sys/sys/event.h	Wed Sep 16 03:15:57 2009	(r197240)
>  struct filterops {
>  	int	f_isfd;		/* true if ident == filedescriptor */
>  	int	(*f_attach)(struct knote *kn);
>  	void	(*f_detach)(struct knote *kn);
>  	int	(*f_event)(struct knote *kn, long hint);
> +	void	(*f_touch)(struct knote *kn, struct kevent *kev, long type);
>  };
>  
>  /*
> @@ -193,6 +204,7 @@ struct knote {
>  	} kn_ptr;
>  	struct			filterops *kn_fop;
>  	void			*kn_hook;
> +	int			kn_hookid;
>  
You may want to add required padding to struct filterops and struct knote
on stable/8 branch now, to be able to merge this after 8.0 is released
without breaking KBI.
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