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vxlan: advertise netns of vxlan dev in fdb msg

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Netlink FDB messages are sent in the link netns. The header of these messages
contains the ifindex (ndm_ifindex) of the netdevice, but this ifindex is
unusable in case of x-netns vxlan.
I named the new attribute NDA_NDM_IFINDEX_NETNSID, to avoid confusion with
NDA_IFINDEX.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Dichtel 2015-01-20 15:15:47 +01:00 committed by David S. Miller
parent e5f4e7b9ff
commit 193523bf93
3 changed files with 7 additions and 0 deletions
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5
drivers/net/vxlan.c
View file

@ -339,6 +339,11 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
ndm->ndm_flags = fdb->flags;
ndm->ndm_type = RTN_UNICAST;
if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
nla_put_s32(skb, NDA_NDM_IFINDEX_NETNSID,
peernet2id(vxlan->net, dev_net(vxlan->dev))))
goto nla_put_failure;
if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
goto nla_put_failure;

1
include/uapi/linux/neighbour.h
View file

@ -25,6 +25,7 @@ enum {
NDA_VNI,
NDA_IFINDEX,
NDA_MASTER,
NDA_NDM_IFINDEX_NETNSID,
__NDA_MAX
};

1
net/core/net_namespace.c
View file

@ -202,6 +202,7 @@ int peernet2id(struct net *net, struct net *peer)
return id >= 0 ? id : NETNSA_NSID_NOT_ASSIGNED;
}
EXPORT_SYMBOL(peernet2id);
struct net *get_net_ns_by_id(struct net *net, int id)
{