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net: bridge: add bitfield for options and convert vlan opts

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Bridge options have usually been added as separate fields all over the
net_bridge struct taking up space and ending up in different cache lines.
Let's move them to a single bitfield to save up space and speedup lookups.
This patch adds a simple API for option modifying and retrieving using
bitops and converts the first user of the API - the bridge vlan options
(vlan_enabled and vlan_stats_enabled).

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov
2018-09-26 17:01:00 +03:00
committed by David S. Miller
parent 1c1cb6d032
commit ae75767ec2
5 changed files with 49 additions and 18 deletions
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16
net/bridge/br_private.h
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@@ -306,16 +306,20 @@ static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_devi
rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
}
enum net_bridge_opts {
BROPT_VLAN_ENABLED,
BROPT_VLAN_STATS_ENABLED,
};
struct net_bridge {
spinlock_t lock;
spinlock_t hash_lock;
struct list_head port_list;
struct net_device *dev;
struct pcpu_sw_netstats __percpu *stats;
unsigned long options;
/* These fields are accessed on each packet */
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
u8 vlan_enabled;
u8 vlan_stats_enabled;
__be16 vlan_proto;
u16 default_pvid;
struct net_bridge_vlan_group __rcu *vlgrp;
@@ -489,6 +493,14 @@ static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
return true;
}
static inline int br_opt_get(const struct net_bridge *br,
enum net_bridge_opts opt)
{
return test_bit(opt, &br->options);
}
void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
/* br_device.c */
void br_dev_setup(struct net_device *dev);
void br_dev_delete(struct net_device *dev, struct list_head *list);