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net: bridge: add helper to offload ageing time

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The SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME switchdev attr is actually set
when initializing a bridge port, and when configuring the bridge ageing
time from ioctl/netlink/sysfs.

Add a __set_ageing_time helper to offload the ageing time to physical
switches, and add the SWITCHDEV_F_DEFER flag since it can be called
under bridge lock.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot
2016-12-10 13:44:27 -05:00
committed by David S. Miller
parent bfd8d977af
commit 82dd4332aa
3 changed files with 24 additions and 17 deletions
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28
net/bridge/br_stp.c
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@@ -562,6 +562,24 @@ int br_set_max_age(struct net_bridge *br, unsigned long val)
}
/* called under bridge lock */
int __set_ageing_time(struct net_device *dev, unsigned long t)
{
struct switchdev_attr attr = {
.orig_dev = dev,
.id = SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
.flags = SWITCHDEV_F_SKIP_EOPNOTSUPP | SWITCHDEV_F_DEFER,
.u.ageing_time = jiffies_to_clock_t(t),
};
int err;
err = switchdev_port_attr_set(dev, &attr);
if (err && err != -EOPNOTSUPP)
return err;
return 0;
}
/* Set time interval that dynamic forwarding entries live
* For pure software bridge, allow values outside the 802.1
* standard specification for special cases:
@@ -572,17 +590,11 @@ int br_set_max_age(struct net_bridge *br, unsigned long val)
*/
int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time)
{
struct switchdev_attr attr = {
.orig_dev = br->dev,
.id = SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
.flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
.u.ageing_time = ageing_time,
};
unsigned long t = clock_t_to_jiffies(ageing_time);
int err;
err = switchdev_port_attr_set(br->dev, &attr);
if (err && err != -EOPNOTSUPP)
err = __set_ageing_time(br->dev, t);
if (err)
return err;
br->ageing_time = t;