bridge: vlan: learn to count
Add support for per-VLAN Tx/Rx statistics. Every global vlan context gets
allocated a per-cpu stats which is then set in each per-port vlan context
for quick access. The br_allowed_ingress() common function is used to
account for Rx packets and the br_handle_vlan() common function is used
to account for Tx packets. Stats accounting is performed only if the
bridge-wide vlan_stats_enabled option is set either via sysfs or netlink.
A struct hole between vlan_enabled and vlan_proto is used for the new
option so it is in the same cache line. Currently it is binary (on/off)
but it is intentionally restricted to exactly 0 and 1 since other values
will be used in the future for different purposes (e.g. per-port stats).
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index d9da857..12b6d82 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -77,12 +77,21 @@
};
#endif
+struct br_vlan_stats {
+ u64 rx_bytes;
+ u64 rx_packets;
+ u64 tx_bytes;
+ u64 tx_packets;
+ struct u64_stats_sync syncp;
+};
+
/**
* struct net_bridge_vlan - per-vlan entry
*
* @vnode: rhashtable member
* @vid: VLAN id
* @flags: bridge vlan flags
+ * @stats: per-cpu VLAN statistics
* @br: if MASTER flag set, this points to a bridge struct
* @port: if MASTER flag unset, this points to a port struct
* @refcnt: if MASTER flag set, this is bumped for each port referencing it
@@ -100,6 +109,7 @@
struct rhash_head vnode;
u16 vid;
u16 flags;
+ struct br_vlan_stats __percpu *stats;
union {
struct net_bridge *br;
struct net_bridge_port *port;
@@ -342,6 +352,7 @@
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
struct net_bridge_vlan_group __rcu *vlgrp;
u8 vlan_enabled;
+ u8 vlan_stats_enabled;
__be16 vlan_proto;
u16 default_pvid;
#endif
@@ -691,6 +702,7 @@
int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
+int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
int br_vlan_init(struct net_bridge *br);
int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
@@ -880,7 +892,6 @@
{
return NULL;
}
-
#endif
struct nf_br_ops {