linux-kernel - Re: [PATCH -tip v3 3/6] net: sctp: Add SCTP ACK tracking trace event

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Date:   Wed, 20 Dec 2017 10:05:02 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Ian McDonald <ian.mcdonald@...di.co.nz>,
        Vlad Yasevich <vyasevich@...il.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        "H . Peter Anvin" <hpa@...or.com>,
        Gerrit Renker <gerrit@....abdn.ac.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Neil Horman <nhorman@...driver.com>, dccp@...r.kernel.org,
        netdev@...r.kernel.org, linux-sctp@...r.kernel.org,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH -tip v3 3/6] net: sctp: Add SCTP ACK tracking trace
 event

On Tue, 19 Dec 2017 10:20:24 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Tue, 19 Dec 2017 17:58:25 +0900
> Masami Hiramatsu <mhiramat@...nel.org> wrote:
> 
> > +TRACE_EVENT(sctp_probe,
> > +
> > +	TP_PROTO(const struct sctp_endpoint *ep,
> > +		 const struct sctp_association *asoc,
> > +		 struct sctp_chunk *chunk),
> > +
> > +	TP_ARGS(ep, asoc, chunk),
> > +
> > +	TP_STRUCT__entry(
> > +		__field(__u64, asoc)
> > +		__field(__u32, mark)
> > +		__field(__u16, bind_port)
> > +		__field(__u16, peer_port)
> > +		__field(__u32, pathmtu)
> > +		__field(__u32, rwnd)
> > +		__field(__u16, unack_data)
> > +	),
> > +
> > +	TP_fast_assign(
> > +		struct sctp_transport *sp;
> > +		struct sk_buff *skb = chunk->skb;
> > +
> > +		__entry->asoc = (__u64)asoc;
> > +		__entry->mark = skb->mark;
> > +		__entry->bind_port = ep->base.bind_addr.port;
> > +		__entry->peer_port = asoc->peer.port;
> > +		__entry->pathmtu = asoc->pathmtu;
> > +		__entry->rwnd = asoc->peer.rwnd;
> > +		__entry->unack_data = asoc->unack_data;
> > +
> > +		if (trace_sctp_probe_path_enabled()) {
> > +			list_for_each_entry(sp, &asoc->peer.transport_addr_list,
> > +					    transports) {
> > +				trace_sctp_probe_path(sp, asoc);
> > +			}
> > +		}
> 
> I thought you were going to move this into the code, like I suggested?

Ah, I missed to define sp in the block...

Thanks,

> 
> -- Steve
> 
> > +	),
> > +
> > +	TP_printk("asoc=%#llx mark=%#x bind_port=%d peer_port=%d pathmtu=%d "
> > +		  "rwnd=%u unack_data=%d",
> > +		  __entry->asoc, __entry->mark, __entry->bind_port,
> > +		  __entry->peer_port, __entry->pathmtu, __entry->rwnd,
> > +		  __entry->unack_data)
> > +);
> > +


-- 
Masami Hiramatsu <mhiramat@...nel.org>