Re: [PATCH net-next] bpf: add support for %s specifier to bpf_trace_printk()

[Alexei Starovoitov]

On 8/27/15 4:43 PM, Steven Rostedt wrote:
> On Thu, 27 Aug 2015 16:20:39 -0700 (PDT)
> David Miller <davem@xxxxxxxxxxxxx> wrote:
>
> > From: Alexei Starovoitov <ast@xxxxxxxxxxxx>
> > Date: Thu, 27 Aug 2015 16:06:14 -0700
> >
> > > Fair or you still think it should be per byte copy?
> >
> > I'm terribly surprised we don't have an equivalent of strncpy()
> > for unsafe kernel pointers.
> >
> > You probably won't be the last person to want this, and it's silly
> > to optimize it in one place and then wait for cut&paste into the
> > next guy.
>
> If it doesn't exist. Perhaps its time to create it.

all makes sense. Working on generalizing FETCH_FUNC_NAME
from trace_kprobe.c. Seems to fit quite well.


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