On Mon, 12 May 2014 18:13:26 +0200 Olivier MATZ <olivier.matz at 6wind.com> wrote:
> Hi Stephen, > > On 05/12/2014 05:59 PM, Stephen Hemminger wrote: > > There is one case which this case might make problematic. > > Right now it is possible to clone an mbuf and in the cloned mbuf > > use the associated data buffer as private meta data store. > > This is convenient (like skb->cb in Linux) and avoids addtional > > allocation. > > I don't get your point. Why using rte_pktmbuf_mtod(m, char *) > wouldn't work in your case? In cloned mbuf rte_pktmbuf_mtod(m, char *) points to the original data. RTE_MBUF_TO_BADDR(m) points to buffer in the mbuf which we use for metadata (timestamp).
