netdevsim: report stats by default, like a real device

Real devices should implement qstats. Devices which support
pause or FEC configuration should also report the relevant stats.

nsim was missing FEC stats completely, some of the qstats
and pause stats required toggling a debugfs knob.

Note that the tests which used pause always initialize the setting
so they shouldn't be affected by the different starting value.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/netdevsim/ethtool.c b/drivers/net/netdevsim/ethtool.c
index bd546d4d26c68135a917b144196f8b8a8098dc8e..3f9c9327f1498570d5e8579b7ca2910b5cd7ed2c 100644 (file)
--- a/drivers/net/netdevsim/ethtool.c
+++ b/drivers/net/netdevsim/ethtool.c
@@ -140,6 +140,13 @@ nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
        return 0;
 }
 
+static void
+nsim_get_fec_stats(struct net_device *dev, struct ethtool_fec_stats *fec_stats)
+{
+       fec_stats->corrected_blocks.total = 123;
+       fec_stats->uncorrectable_blocks.total = 4;
+}
+
 static int nsim_get_ts_info(struct net_device *dev,
                            struct ethtool_ts_info *info)
 {
@@ -163,6 +170,7 @@ static const struct ethtool_ops nsim_ethtool_ops = {
        .set_channels                   = nsim_set_channels,
        .get_fecparam                   = nsim_get_fecparam,
        .set_fecparam                   = nsim_set_fecparam,
+       .get_fec_stats                  = nsim_get_fec_stats,
        .get_ts_info                    = nsim_get_ts_info,
 };
 
@@ -182,6 +190,9 @@ void nsim_ethtool_init(struct netdevsim *ns)
 
        nsim_ethtool_ring_init(ns);
 
+       ns->ethtool.pauseparam.report_stats_rx = true;
+       ns->ethtool.pauseparam.report_stats_tx = true;
+
        ns->ethtool.fec.fec = ETHTOOL_FEC_NONE;
        ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE;
 

diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
index 8330bc0bcb7e53644f1bb3240be00f93fd3d9be3..d7ba447db17c8bcfd77355202d5b6cb7c48cbe6c 100644 (file)
--- a/drivers/net/netdevsim/netdev.c
+++ b/drivers/net/netdevsim/netdev.c
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/netdevice.h>
 #include <linux/slab.h>
+#include <net/netdev_queues.h>
 #include <net/netlink.h>
 #include <net/pkt_cls.h>
 #include <net/rtnetlink.h>
@@ -330,6 +331,53 @@ static const struct net_device_ops nsim_vf_netdev_ops = {
        .ndo_set_features       = nsim_set_features,
 };
 
+/* We don't have true per-queue stats, yet, so do some random fakery here.
+ * Only report stuff for queue 0.
+ */
+static void nsim_get_queue_stats_rx(struct net_device *dev, int idx,
+                                   struct netdev_queue_stats_rx *stats)
+{
+       struct rtnl_link_stats64 rtstats = {};
+
+       if (!idx)
+               nsim_get_stats64(dev, &rtstats);
+
+       stats->packets = rtstats.rx_packets - !!rtstats.rx_packets;
+       stats->bytes = rtstats.rx_bytes;
+}
+
+static void nsim_get_queue_stats_tx(struct net_device *dev, int idx,
+                                   struct netdev_queue_stats_tx *stats)
+{
+       struct rtnl_link_stats64 rtstats = {};
+
+       if (!idx)
+               nsim_get_stats64(dev, &rtstats);
+
+       stats->packets = rtstats.tx_packets - !!rtstats.tx_packets;
+       stats->bytes = rtstats.tx_bytes;
+}
+
+static void nsim_get_base_stats(struct net_device *dev,
+                               struct netdev_queue_stats_rx *rx,
+                               struct netdev_queue_stats_tx *tx)
+{
+       struct rtnl_link_stats64 rtstats = {};
+
+       nsim_get_stats64(dev, &rtstats);
+
+       rx->packets = !!rtstats.rx_packets;
+       rx->bytes = 0;
+       tx->packets = !!rtstats.tx_packets;
+       tx->bytes = 0;
+}
+
+static const struct netdev_stat_ops nsim_stat_ops = {
+       .get_queue_stats_tx     = nsim_get_queue_stats_tx,
+       .get_queue_stats_rx     = nsim_get_queue_stats_rx,
+       .get_base_stats         = nsim_get_base_stats,
+};
+
 static void nsim_setup(struct net_device *dev)
 {
        ether_setup(dev);
@@ -360,6 +408,7 @@ static int nsim_init_netdevsim(struct netdevsim *ns)
 
        ns->phc = phc;
        ns->netdev->netdev_ops = &nsim_netdev_ops;
+       ns->netdev->stat_ops = &nsim_stat_ops;
 
        err = nsim_udp_tunnels_info_create(ns->nsim_dev, ns->netdev);
        if (err)