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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.c
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@@ -175,6 +175,22 @@ static struct notifier_block br_switchdev_notifier = {
.notifier_call = br_switchdev_event,
};
void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on)
{
bool cur = !!br_opt_get(br, opt);
br_debug(br, "toggle option: %d state: %d -> %d\n",
opt, cur, on);
if (cur == on)
return;
if (on)
set_bit(opt, &br->options);
else
clear_bit(opt, &br->options);
}
static void __net_exit br_net_exit(struct net *net)
{
struct net_device *dev;