linux-kernel - Re: [PATCH v3 2.6.39-rc1-tip 26/26] 26: uprobes: filter chain

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Message-ID: <20110406224148.GA5806@linux.vnet.ibm.com>
Date:	Thu, 7 Apr 2011 04:11:48 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>,
	Linux-mm <linux-mm@...ck.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jonathan Corbet <corbet@....net>,
	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Roland McGrath <roland@...k.frob.com>,
	SystemTap <systemtap@...rces.redhat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2.6.39-rc1-tip 26/26] 26: uprobes: filter chain

> > +static bool filter_chain(struct uprobe *uprobe, struct task_struct *t)
> > +{
> > +	struct uprobe_consumer *consumer;
> > +	bool ret = false;
> > +
> > +	down_read(&uprobe->consumer_rwsem);
> > +	for (consumer = uprobe->consumers; consumer;
> > +					consumer = consumer->next) {
> > +		if (!consumer->filter || consumer->filter(consumer, t)) {
> > +			ret = true;
> > +			break;
> > +		}
> > +	}
> > +	up_read(&uprobe->consumer_rwsem);
> > +	return ret;
> > +}
> > +
> 
> Where this function is called from ? This patch seems the last one of this series...
> 

Sorry for the delayed reply, I was travelling to LFCS.
Still I have to connect the filter from trace/perf probe. 
Thats listed as todo and thats the next thing I am planning to work on.
Once we have the connect, this filter_chain and filters that we defined
will be used. Till then these two patches, One that defines filter_chain
and one that defines filters are useless.

-- 
Thanks and Regards
Srikar
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