netdev - [PATCH net-next, 2/3] net: mana: Add counter for XDP

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Date:   Fri, 28 Jan 2022 18:03:37 -0800
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     linux-hyperv@...r.kernel.org, netdev@...r.kernel.org
Cc:     haiyangz@...rosoft.com, decui@...rosoft.com, kys@...rosoft.com,
        sthemmin@...rosoft.com, paulros@...rosoft.com,
        shacharr@...rosoft.com, olaf@...fle.de, vkuznets@...hat.com,
        davem@...emloft.net, linux-kernel@...r.kernel.org
Subject: [PATCH net-next, 2/3] net: mana: Add counter for XDP_TX

This counter will show up in ethtool stat. It is the
number of packets received and forwarded by XDP program.

Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
---
 drivers/net/ethernet/microsoft/mana/mana.h         |  1 +
 drivers/net/ethernet/microsoft/mana/mana_en.c      | 12 ++++++++----
 drivers/net/ethernet/microsoft/mana/mana_ethtool.c |  7 ++++++-
 3 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/microsoft/mana/mana.h b/drivers/net/ethernet/microsoft/mana/mana.h
index 66fc98d7e1d6..8ead960f898d 100644
--- a/drivers/net/ethernet/microsoft/mana/mana.h
+++ b/drivers/net/ethernet/microsoft/mana/mana.h
@@ -52,6 +52,7 @@ struct mana_stats_rx {
 	u64 packets;
 	u64 bytes;
 	u64 xdp_drop;
+	u64 xdp_tx;
 	struct u64_stats_sync syncp;
 };
 
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index 878c3d9bb39d..12067bf5b7d6 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -1035,6 +1035,14 @@ static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe,
 			skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3);
 	}
 
+	u64_stats_update_begin(&rx_stats->syncp);
+	rx_stats->packets++;
+	rx_stats->bytes += pkt_len;
+
+	if (act == XDP_TX)
+		rx_stats->xdp_tx++;
+	u64_stats_update_end(&rx_stats->syncp);
+
 	if (act == XDP_TX) {
 		skb_set_queue_mapping(skb, rxq_idx);
 		mana_xdp_tx(skb, ndev);
@@ -1043,10 +1051,6 @@ static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe,
 
 	napi_gro_receive(napi, skb);
 
-	u64_stats_update_begin(&rx_stats->syncp);
-	rx_stats->packets++;
-	rx_stats->bytes += pkt_len;
-	u64_stats_update_end(&rx_stats->syncp);
 	return;
 
 drop_xdp:
diff --git a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
index e1ccb9bf62de..e13f2453eabb 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
@@ -23,7 +23,7 @@ static int mana_get_sset_count(struct net_device *ndev, int stringset)
 	if (stringset != ETH_SS_STATS)
 		return -EINVAL;
 
-	return ARRAY_SIZE(mana_eth_stats) + num_queues * 5;
+	return ARRAY_SIZE(mana_eth_stats) + num_queues * 6;
 }
 
 static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
@@ -48,6 +48,8 @@ static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
 		p += ETH_GSTRING_LEN;
 		sprintf(p, "rx_%d_xdp_drop", i);
 		p += ETH_GSTRING_LEN;
+		sprintf(p, "rx_%d_xdp_tx", i);
+		p += ETH_GSTRING_LEN;
 	}
 
 	for (i = 0; i < num_queues; i++) {
@@ -69,6 +71,7 @@ static void mana_get_ethtool_stats(struct net_device *ndev,
 	unsigned int start;
 	u64 packets, bytes;
 	u64 xdp_drop;
+	u64 xdp_tx;
 	int q, i = 0;
 
 	if (!apc->port_is_up)
@@ -85,11 +88,13 @@ static void mana_get_ethtool_stats(struct net_device *ndev,
 			packets = rx_stats->packets;
 			bytes = rx_stats->bytes;
 			xdp_drop = rx_stats->xdp_drop;
+			xdp_tx = rx_stats->xdp_tx;
 		} while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start));
 
 		data[i++] = packets;
 		data[i++] = bytes;
 		data[i++] = xdp_drop;
+		data[i++] = xdp_tx;
 	}
 
 	for (q = 0; q < num_queues; q++) {
-- 
2.25.1