[PATCH v2 2/4] net/af_xdp: fix mbuf alloc failed statistic

[Ciara Loftus]

Failures to allocate mbufs in the receive path were not being
accounted for in the ethdev statistics. Fix this.

Bugzilla ID: 1429
Fixes: f1debd77efaf ("net/af_xdp: introduce AF_XDP PMD")
cc: sta...@dpdk.org

Reported-by: Stephen Hemminger <step...@networkplumber.org>
Signed-off-by: Ciara Loftus <ciara.lof...@intel.com>
---
v2:
* Fixed typo in commit message
* Remove unnecessary local stat for alloc_failed

 drivers/net/af_xdp/rte_eth_af_xdp.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c 
b/drivers/net/af_xdp/rte_eth_af_xdp.c
index fee0d5d5f3..9bcf971ae5 100644
--- a/drivers/net/af_xdp/rte_eth_af_xdp.c
+++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
@@ -312,6 +312,7 @@ af_xdp_rx_zc(void *queue, struct rte_mbuf **bufs, uint16_t 
nb_pkts)
        unsigned long rx_bytes = 0;
        int i;
        struct rte_mbuf *fq_bufs[ETH_AF_XDP_RX_BATCH_SIZE];
+       struct rte_eth_dev *dev = &rte_eth_devices[rxq->port];
 
        nb_pkts = xsk_ring_cons__peek(rx, nb_pkts, &idx_rx);
 
@@ -339,6 +340,8 @@ af_xdp_rx_zc(void *queue, struct rte_mbuf **bufs, uint16_t 
nb_pkts)
                 * xsk_ring_cons__peek
                 */
                rx->cached_cons -= nb_pkts;
+               dev->data->rx_mbuf_alloc_failed += nb_pkts;
+
                return 0;
        }
 
@@ -390,6 +393,7 @@ af_xdp_rx_cp(void *queue, struct rte_mbuf **bufs, uint16_t 
nb_pkts)
        int i;
        uint32_t free_thresh = fq->size >> 1;
        struct rte_mbuf *mbufs[ETH_AF_XDP_RX_BATCH_SIZE];
+       struct rte_eth_dev *dev = &rte_eth_devices[rxq->port];
 
        if (xsk_prod_nb_free(fq, free_thresh) >= free_thresh)
                (void)reserve_fill_queue(umem, nb_pkts, NULL, fq);
@@ -408,6 +412,7 @@ af_xdp_rx_cp(void *queue, struct rte_mbuf **bufs, uint16_t 
nb_pkts)
                 * xsk_ring_cons__peek
                 */
                rx->cached_cons -= nb_pkts;
+               dev->data->rx_mbuf_alloc_failed += nb_pkts;
                return 0;
        }
 
-- 
2.34.1