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Date: Thu, 29 Nov 2018 20:00:07 -0500
From: Debabrata Banerjee <dbanerje@...mai.com>
To: "David S . Miller" <davem@...emloft.net>,
Alexander Duyck <alexander.h.duyck@...el.com>,
Eric Dumazet <eric.dumazet@...il.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
netdev@...r.kernel.org
Cc: dbanerje@...mai.com
Subject: [PATCH RFC net-next v2] net: vlan/macvlan: count packets properly with gso
Fix packet count when using vlan/macvlan drivers with gso. Without this it
is not possible to reconcile packet counts between underlying devices and
these virtual devices. Additionally, the output looks wrong in a standalone
way i.e. device MTU of 1500, 1 packet sent, 31856 bytes sent.
There are many other drivers that likely have a similar problem, although
it is not clear how many of those could be used with gso. Perhaps all
packet counting should be wrapped in a helper fn.
v2: bytes were also incorrect for gso skb's, fix tx as that is readily
available. Fix rx packets for macvlan.
Signed-off-by: Debabrata Banerjee <dbanerje@...mai.com>
---
drivers/net/ethernet/intel/fm10k/fm10k_main.c | 4 ++--
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 4 ++--
drivers/net/macvlan.c | 13 ++++++++-----
drivers/net/macvtap.c | 2 +-
include/linux/if_macvlan.h | 6 +++---
net/8021q/vlan_core.c | 3 ++-
net/8021q/vlan_dev.c | 4 ++--
7 files changed, 20 insertions(+), 16 deletions(-)
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_main.c b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
index 6fd15a734324..e39fad2d888f 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_main.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
@@ -431,8 +431,8 @@ static void fm10k_type_trans(struct fm10k_ring *rx_ring,
if (!l2_accel)
skb_record_rx_queue(skb, rx_ring->queue_index);
else
- macvlan_count_rx(netdev_priv(dev), skb->len + ETH_HLEN, true,
- false);
+ macvlan_count_rx(netdev_priv(dev), skb_shinfo(skb)->gso_segs ?: 1,
+ skb->len + ETH_HLEN, true, false);
skb->protocol = eth_type_trans(skb, dev);
}
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 49a4ea38eb07..474e72ec68b0 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -1704,8 +1704,8 @@ void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
if (netif_is_ixgbe(dev))
skb_record_rx_queue(skb, rx_ring->queue_index);
else
- macvlan_count_rx(netdev_priv(dev), skb->len + ETH_HLEN, true,
- false);
+ macvlan_count_rx(netdev_priv(dev), skb_shinfo(skb)->gso_segs ?: 1,
+ skb->len + ETH_HLEN, true, false);
skb->protocol = eth_type_trans(skb, dev);
}
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index fc8d5f1ee1ad..ab8743777897 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -289,7 +289,8 @@ static void macvlan_broadcast(struct sk_buff *skb,
nskb, vlan, eth,
mode == MACVLAN_MODE_BRIDGE) ?:
netif_rx_ni(nskb);
- macvlan_count_rx(vlan, skb->len + ETH_HLEN,
+ macvlan_count_rx(vlan, skb_shinfo(skb)->gso_segs ?: 1,
+ skb->len + ETH_HLEN,
err == NET_RX_SUCCESS, true);
}
}
@@ -418,7 +419,8 @@ static void macvlan_forward_source_one(struct sk_buff *skb,
nskb->pkt_type = PACKET_HOST;
ret = netif_rx(nskb);
- macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
+ macvlan_count_rx(vlan, skb_shinfo(skb)->gso_segs ?: 1, len,
+ ret == NET_RX_SUCCESS, false);
}
static void macvlan_forward_source(struct sk_buff *skb,
@@ -505,7 +507,8 @@ static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
ret = NET_RX_SUCCESS;
handle_res = RX_HANDLER_ANOTHER;
out:
- macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
+ macvlan_count_rx(vlan, skb_shinfo(skb)->gso_segs ?: 1, len,
+ ret == NET_RX_SUCCESS, false);
return handle_res;
}
@@ -553,7 +556,7 @@ static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct macvlan_dev *vlan = netdev_priv(dev);
- unsigned int len = skb->len;
+ unsigned int len = qdisc_skb_cb(skb)->pkt_len;
int ret;
if (unlikely(netpoll_tx_running(dev)))
@@ -566,7 +569,7 @@ static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
u64_stats_update_begin(&pcpu_stats->syncp);
- pcpu_stats->tx_packets++;
+ pcpu_stats->tx_packets += skb_shinfo(skb)->gso_segs ?: 1;
pcpu_stats->tx_bytes += len;
u64_stats_update_end(&pcpu_stats->syncp);
} else {
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index 9a10029caf83..06880a61cab9 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -64,7 +64,7 @@ static void macvtap_count_rx_dropped(struct tap_dev *tap)
struct macvtap_dev *vlantap = container_of(tap, struct macvtap_dev, tap);
struct macvlan_dev *vlan = &vlantap->vlan;
- macvlan_count_rx(vlan, 0, 0, 0);
+ macvlan_count_rx(vlan, 1, 0, 0, 0);
}
static void macvtap_update_features(struct tap_dev *tap,
diff --git a/include/linux/if_macvlan.h b/include/linux/if_macvlan.h
index 2e55e4cdbd8a..0f592925c559 100644
--- a/include/linux/if_macvlan.h
+++ b/include/linux/if_macvlan.h
@@ -37,15 +37,15 @@ struct macvlan_dev {
};
static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
- unsigned int len, bool success,
- bool multicast)
+ unsigned int packets, unsigned int len,
+ bool success, bool multicast)
{
if (likely(success)) {
struct vlan_pcpu_stats *pcpu_stats;
pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
u64_stats_update_begin(&pcpu_stats->syncp);
- pcpu_stats->rx_packets++;
+ pcpu_stats->rx_packets += packets;
pcpu_stats->rx_bytes += len;
if (multicast)
pcpu_stats->rx_multicast++;
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index a313165e7a67..3297eac36541 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -4,6 +4,7 @@
#include <linux/if_vlan.h>
#include <linux/netpoll.h>
#include <linux/export.h>
+#include <net/sch_generic.h>
#include "vlan.h"
bool vlan_do_receive(struct sk_buff **skbp)
@@ -62,7 +63,7 @@ bool vlan_do_receive(struct sk_buff **skbp)
rx_stats = this_cpu_ptr(vlan_dev_priv(vlan_dev)->vlan_pcpu_stats);
u64_stats_update_begin(&rx_stats->syncp);
- rx_stats->rx_packets++;
+ rx_stats->rx_packets += skb_shinfo(skb)->gso_segs ?: 1;
rx_stats->rx_bytes += skb->len;
if (skb->pkt_type == PACKET_MULTICAST)
rx_stats->rx_multicast++;
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index b2d9c8f27cd7..0e4aca7d594f 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -124,7 +124,7 @@ static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
}
skb->dev = vlan->real_dev;
- len = skb->len;
+ len = qdisc_skb_cb(skb)->pkt_len;
if (unlikely(netpoll_tx_running(dev)))
return vlan_netpoll_send_skb(vlan, skb);
@@ -135,7 +135,7 @@ static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
u64_stats_update_begin(&stats->syncp);
- stats->tx_packets++;
+ stats->tx_packets += skb_shinfo(skb)->gso_segs ?: 1;
stats->tx_bytes += len;
u64_stats_update_end(&stats->syncp);
} else {
--
2.19.2
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