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bridge: netlink: add support for vlan_filtering attribute

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This patch adds the ability to toggle the vlan filtering support via
netlink. Since we're already running with rtnl in .changelink() we don't
need to take any additional locks.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2015-08-07 19:40:45 +03:00 committed by David S. Miller
parent e72ee3ed51
commit a7854037da
4 changed files with 33 additions and 7 deletions
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1
include/uapi/linux/if_link.h
View File

@ -230,6 +230,7 @@ enum {
IFLA_BR_AGEING_TIME,
IFLA_BR_STP_STATE,
IFLA_BR_PRIORITY,
IFLA_BR_VLAN_FILTERING,
__IFLA_BR_MAX,
};

14
net/bridge/br_netlink.c
View File

@ -724,6 +724,7 @@ static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
[IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
[IFLA_BR_STP_STATE] = { .type = NLA_U32 },
[IFLA_BR_PRIORITY] = { .type = NLA_U16 },
[IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
};
static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
@ -771,6 +772,14 @@ static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
br_stp_set_bridge_priority(br, priority);
}
if (data[IFLA_BR_VLAN_FILTERING]) {
u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
err = __br_vlan_filter_toggle(br, vlan_filter);
if (err)
return err;
}
return 0;
}
@ -782,6 +791,7 @@ static size_t br_get_size(const struct net_device *brdev)
nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
0;
}
@ -794,13 +804,15 @@ static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
u32 stp_enabled = br->stp_enabled;
u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
u8 vlan_enabled = br_vlan_enabled(br);
if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
nla_put_u16(skb, IFLA_BR_PRIORITY, priority))
nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled))
return -EMSGSIZE;
return 0;

7
net/bridge/br_private.h
View File

@ -614,6 +614,7 @@ int br_vlan_delete(struct net_bridge *br, u16 vid);
void br_vlan_flush(struct net_bridge *br);
bool br_vlan_find(struct net_bridge *br, u16 vid);
void br_recalculate_fwd_mask(struct net_bridge *br);
int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
int br_vlan_init(struct net_bridge *br);
@ -771,6 +772,12 @@ static inline int br_vlan_enabled(struct net_bridge *br)
{
return 0;
}
static inline int __br_vlan_filter_toggle(struct net_bridge *br,
unsigned long val)
{
return -EOPNOTSUPP;
}
#endif
struct nf_br_ops {

18
net/bridge/br_vlan.c
View File

@ -468,21 +468,27 @@ void br_recalculate_fwd_mask(struct net_bridge *br)
~(1u << br->group_addr[5]);
}
int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
{
if (!rtnl_trylock())
return restart_syscall();
if (br->vlan_enabled == val)
goto unlock;
return 0;
br->vlan_enabled = val;
br_manage_promisc(br);
recalculate_group_addr(br);
br_recalculate_fwd_mask(br);
unlock:
return 0;
}
int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
{
if (!rtnl_trylock())
return restart_syscall();
__br_vlan_filter_toggle(br, val);
rtnl_unlock();
return 0;
}