[PATCH net v2] ixgbe: implement get_queue_stats_rx

[Kshitiz Bartariya]

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 <kshitiz.bartariya@xxxxxxxxxxx>
---
v2:
 - Removed setting of hw_gro counters as ixgbe doesn't advertise it
 - Removed idx and ring checks as they are already checked against 
   real_num_rx_queues
Thanks Jakub Kicinski for the review comments.

v1: https://lore.kernel.org/lkml/20260523144022.36484-1-kshitiz.bartariya@xxxxxxxxxxx/


 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 2646ee6f295f..2184213727c7 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -9740,6 +9740,21 @@ 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)
 {
@@ -11643,6 +11658,7 @@ 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)