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bridge: netlink: add group_addr support

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Add IFLA_BR_GROUP_ADDR attribute to allow setting and retrieving the
group_addr via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2015-10-04 14:23:35 +02:00 committed by David S. Miller
parent d76bd14e0f
commit 111189abc5
2 changed files with 25 additions and 1 deletions
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1
include/uapi/linux/if_link.h
View File

@ -243,6 +243,7 @@ enum {
IFLA_BR_TCN_TIMER,
IFLA_BR_TOPOLOGY_CHANGE_TIMER,
IFLA_BR_GC_TIMER,
IFLA_BR_GROUP_ADDR,
__IFLA_BR_MAX,
};

25
net/bridge/br_netlink.c
View File

@ -765,6 +765,8 @@ static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
[IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
[IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
[IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
[IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
.len = ETH_ALEN },
};
static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
@ -838,6 +840,25 @@ static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
br->group_fwd_mask = fwd_mask;
}
if (data[IFLA_BR_GROUP_ADDR]) {
u8 new_addr[ETH_ALEN];
if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
return -EINVAL;
memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
if (!is_link_local_ether_addr(new_addr))
return -EINVAL;
if (new_addr[5] == 1 || /* 802.3x Pause address */
new_addr[5] == 2 || /* 802.3ad Slow protocols */
new_addr[5] == 3) /* 802.1X PAE address */
return -EINVAL;
spin_lock_bh(&br->lock);
memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
spin_unlock_bh(&br->lock);
br->group_addr_set = true;
br_recalculate_fwd_mask(br);
}
return 0;
}
@ -864,6 +885,7 @@ static size_t br_get_size(const struct net_device *brdev)
nla_total_size(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
nla_total_size(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
nla_total_size(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
0;
}
@ -911,7 +933,8 @@ static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
nla_put_u64(skb, IFLA_BR_TCN_TIMER, tcn_timer) ||
nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER,
topology_change_timer) ||
nla_put_u64(skb, IFLA_BR_GC_TIMER, gc_timer))
nla_put_u64(skb, IFLA_BR_GC_TIMER, gc_timer) ||
nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
return -EMSGSIZE;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING