Hook into the netdev_stat_ops interface to expose per RX queue
statistics through the netdev generic netlink API.

The following counters are filled:

 - alloc_fail: sum of alloc_rx_page_failed and alloc_rx_buff_failed

 - csum_bad: maps directly to csum_err, which is incremented for both
   IP header and L4 checksum errors in ixgbe_rx_checksum().

Signed-off-by: Kshitiz Bartariya <[email protected]>
---
This patch was previously discussed for the net tree:
Link: 
https://lore.kernel.org/lkml/[email protected]/

Sending to net-next as suggested by Jacob Keller and Aleksandr Loktionov.


 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c 
b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index bc16e4c93fd4..05d4b8aff1fc 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -9759,6 +9759,21 @@ static void ixgbe_get_stats64(struct net_device *netdev,
        stats->rx_missed_errors = netdev->stats.rx_missed_errors;
 }
 
+static void ixgbe_get_queue_stats_rx(struct net_device *dev, int idx,
+                                    struct netdev_queue_stats_rx *stats)
+{
+       struct ixgbe_adapter *adapter = ixgbe_from_netdev(dev);
+       struct ixgbe_ring *ring = adapter->rx_ring[idx];
+
+       stats->alloc_fail = ring->rx_stats.alloc_rx_page_failed +
+                           ring->rx_stats.alloc_rx_buff_failed;
+       stats->csum_bad = ring->rx_stats.csum_err;
+}
+
+static const struct netdev_stat_ops ixgbe_stat_ops = {
+       .get_queue_stats_rx     = ixgbe_get_queue_stats_rx,
+};
+
 static int ixgbe_ndo_get_vf_stats(struct net_device *netdev, int vf,
                                  struct ifla_vf_stats *vf_stats)
 {
@@ -11662,6 +11677,7 @@ static int ixgbe_probe(struct pci_dev *pdev, const 
struct pci_device_id *ent)
        hw->phy.mdio.mdio_write = ixgbe_mdio_write;
 
        netdev->netdev_ops = &ixgbe_netdev_ops;
+       netdev->stat_ops   = &ixgbe_stat_ops;
        ixgbe_set_ethtool_ops(netdev);
        netdev->watchdog_timeo = 5 * HZ;
        strscpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
-- 
2.50.1 (Apple Git-155)

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