[PATCH v2 1/2] test: add a test for null PMD

[Stephen Hemminger]

On Tue, 6 Jan 2026 17:40:43 +0000
Marat Khalili <marat.khalili at huawei.com> wrote:

> > +/* Create random valid ethernet packets */
> > +static int
> > +test_mbuf_setup_burst(struct rte_mbuf **bufs, unsigned int burst_size)
> > +{
> > +	unsigned int i;
> > +
> > +	if (rte_pktmbuf_alloc_bulk(mp, bufs, burst_size) != 0)
> > +		return -1;
> > +
> > +	for (i = 0; i < burst_size; i++) {
> > +		struct rte_mbuf *m = bufs[i];
> > +		uint16_t len;
> > +
> > +		/* Choose random length between ether min and available space */
> > +		len = rte_rand_max(rte_pktmbuf_tailroom(m) - RTE_ETHER_MIN_LEN)  
> 
> Nit: could technically use rte_pktmbuf_tailroom(m) - RTE_ETHER_MIN_LEN + 1.
> 
> > +			+ RTE_ETHER_MIN_LEN;
> > +		m->data_len = len;
> > +		m->buf_len = len;  
> 
> Not sure why we are changing buf_len here.
> 
> > +	}
> > +	return 0;
> > +}  

Next version is going to use packet generator stuff that is in test infra now.