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bridge: Add netlink support for vlan_protocol attribute

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This enables bridge vlan_protocol to be configured through netlink.

When CONFIG_BRIDGE_VLAN_FILTERING is disabled, kernel behaves the
same way as this feature is not implemented.

Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Toshiaki Makita 2015-08-27 15:32:26 +09:00 committed by David S. Miller
parent 9c9a6524b5
commit d2d427b392
4 changed files with 57 additions and 14 deletions
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1
include/uapi/linux/if_link.h
View File

@ -231,6 +231,7 @@ enum {
IFLA_BR_STP_STATE,
IFLA_BR_PRIORITY,
IFLA_BR_VLAN_FILTERING,
IFLA_BR_VLAN_PROTOCOL,
__IFLA_BR_MAX,
};

34
net/bridge/br_netlink.c
View File

@ -673,6 +673,21 @@ static int br_validate(struct nlattr *tb[], struct nlattr *data[])
return -EADDRNOTAVAIL;
}
if (!data)
return 0;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
if (data[IFLA_BR_VLAN_PROTOCOL]) {
switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
case htons(ETH_P_8021Q):
case htons(ETH_P_8021AD):
break;
default:
return -EPROTONOSUPPORT;
}
}
#endif
return 0;
}
@ -729,6 +744,7 @@ static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
[IFLA_BR_STP_STATE] = { .type = NLA_U32 },
[IFLA_BR_PRIORITY] = { .type = NLA_U16 },
[IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
[IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
};
static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
@ -784,6 +800,16 @@ static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
return err;
}
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
if (data[IFLA_BR_VLAN_PROTOCOL]) {
__be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
err = __br_vlan_set_proto(br, vlan_proto);
if (err)
return err;
}
#endif
return 0;
}
@ -796,6 +822,9 @@ static size_t br_get_size(const struct net_device *brdev)
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 */
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
#endif
0;
}
@ -819,6 +848,11 @@ static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled))
return -EMSGSIZE;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto))
return -EMSGSIZE;
#endif
return 0;
}

1
net/bridge/br_private.h
View File

@ -616,6 +616,7 @@ 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, __be16 proto);
int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
int br_vlan_init(struct net_bridge *br);
int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);

35
net/bridge/br_vlan.c
View File

@ -492,23 +492,16 @@ int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
return 0;
}
int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
{
int err = 0;
struct net_bridge_port *p;
struct net_port_vlans *pv;
__be16 proto, oldproto;
__be16 oldproto;
u16 vid, errvid;
if (val != ETH_P_8021Q && val != ETH_P_8021AD)
return -EPROTONOSUPPORT;
if (!rtnl_trylock())
return restart_syscall();
proto = htons(val);
if (br->vlan_proto == proto)
goto unlock;
return 0;
/* Add VLANs for the new proto to the device filter. */
list_for_each_entry(p, &br->port_list, list) {
@ -539,9 +532,7 @@ int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
vlan_vid_del(p->dev, oldproto, vid);
}
unlock:
rtnl_unlock();
return err;
return 0;
err_filt:
errvid = vid;
@ -557,7 +548,23 @@ err_filt:
vlan_vid_del(p->dev, proto, vid);
}
goto unlock;
return err;
}
int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
{
int err;
if (val != ETH_P_8021Q && val != ETH_P_8021AD)
return -EPROTONOSUPPORT;
if (!rtnl_trylock())
return restart_syscall();
err = __br_vlan_set_proto(br, htons(val));
rtnl_unlock();
return err;
}
static bool vlan_default_pvid(struct net_port_vlans *pv, u16 vid)