On Wed, 26 Aug 2015 06:32:55 -0400
Jeff Layton <jlayton@xxxxxxxxxxxxxxx> wrote:
> > TP_fast_assign(
> > - __entry->xprt = xprt,
> > - xprt ? memcpy(&__entry->ss, &xprt->xpt_remote, sizeof(__entry->ss)) : memset(&__entry->ss, 0, sizeof(__entry->ss));
> > + __entry->xprt = xprt;
> > + __entry->addr =
> > + xprt ? (struct sockaddr *)&xprt->xpt_remote : NULL;
>
> NAK, this is wrong. %pIScp will dereference that address so you don't
Ug, I hate that printk option. It can be dangerous.
> want to pass a NULL pointer to it. We do want to save a copy of the
> sockaddr.
Save just enough for what you need to print out. Don't waste any space
on the ring buffer that isn't necessary.
-- Steve
>
> > __entry->flags = xprt ? xprt->xpt_flags : 0;
> > ),
> >
> > TP_printk("xprt=0x%p addr=%pIScp flags=%s", __entry->xprt,
> > - (struct sockaddr *)&__entry->ss,
> > - show_svc_xprt_flags(__entry->flags))
> > + __entry->addr, show_svc_xprt_flags(__entry->flags))
> > );
> >
> > TRACE_EVENT(svc_wake_up,
>
>
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