[dpdk-dev] [PATCH 1/4] mbuf: add accessor function for private data area

[Dan Gora]

Hi Andrew,

On Sat, Jun 9, 2018 at 2:23 AM, Andrew Rybchenko
<arybchenko at solarflare.com> wrote:

> BTW, thinking about function I found out there is a trap in private area
> size related to the function. I think that the function description should
> highlight that rte_pktmbuf_priv_size(m->pool) should be used to
> find out the size of private area since indirect mbuf has size of the
> direct private are in its priv_size (but we return pointer to the indirect
> mbuf (the mbuf itself) private area here).
>

hmm... I guess I didn't realize that.

I think that what I'm going to do is just remove the check for
m->priv_size == 0 entirely.  It seems like checking the priv_size is
just going to cause more problems down the road than it is worth.  The
whole point of this was just to have a simple API function to access
the private area, not to fully save the programmer from shooting
him/herself in the foot by accessing a private data area which doesn't
necessarily exist.

thanks,
dan