bridge: netlink: export per-vlan stats

[cascardo/linux.git] / net / bridge / br_vlan.c

diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 065c353..b6de4f4 100644 (file)
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -1054,3 +1054,30 @@ void nbp_vlan_flush(struct net_bridge_port *port)
        synchronize_rcu();
        __vlan_group_free(vg);
 }
+
+void br_vlan_get_stats(const struct net_bridge_vlan *v,
+                      struct br_vlan_stats *stats)
+{
+       int i;
+
+       memset(stats, 0, sizeof(*stats));
+       for_each_possible_cpu(i) {
+               u64 rxpackets, rxbytes, txpackets, txbytes;
+               struct br_vlan_stats *cpu_stats;
+               unsigned int start;
+
+               cpu_stats = per_cpu_ptr(v->stats, i);
+               do {
+                       start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
+                       rxpackets = cpu_stats->rx_packets;
+                       rxbytes = cpu_stats->rx_bytes;
+                       txbytes = cpu_stats->tx_bytes;
+                       txpackets = cpu_stats->tx_packets;
+               } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
+
+               stats->rx_packets += rxpackets;
+               stats->rx_bytes += rxbytes;
+               stats->tx_bytes += txbytes;
+               stats->tx_packets += txpackets;
+       }
+}