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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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1
net/bridge/br_private.h
View File

@ -999,6 +999,7 @@ void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
int br_set_forward_delay(struct net_bridge *br, unsigned long x);
int br_set_hello_time(struct net_bridge *br, unsigned long x);
int br_set_max_age(struct net_bridge *br, unsigned long x);
int __set_ageing_time(struct net_device *dev, unsigned long t);
int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);

28
net/bridge/br_stp.c
View File

@ -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;

12
net/bridge/br_stp_if.c
View File

@ -36,12 +36,6 @@ static inline port_id br_make_port_id(__u8 priority, __u16 port_no)
/* called under bridge lock */
void br_init_port(struct net_bridge_port *p)
{
struct switchdev_attr attr = {
.orig_dev = p->dev,
.id = SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
.flags = SWITCHDEV_F_SKIP_EOPNOTSUPP | SWITCHDEV_F_DEFER,
.u.ageing_time = jiffies_to_clock_t(p->br->ageing_time),
};
int err;
p->port_id = br_make_port_id(p->priority, p->port_no);
@ -50,9 +44,9 @@ void br_init_port(struct net_bridge_port *p)
p->topology_change_ack = 0;
p->config_pending = 0;
err = switchdev_port_attr_set(p->dev, &attr);
if (err && err != -EOPNOTSUPP)
netdev_err(p->dev, "failed to set HW ageing time\n");
err = __set_ageing_time(p->dev, p->br->ageing_time);
if (err)
netdev_err(p->dev, "failed to offload ageing time\n");
}
/* NO locks held */