From 193523bf937309d57c6dd7839bcf34d7a029dbee Mon Sep 17 00:00:00 2001 From: Nicolas Dichtel Date: Tue, 20 Jan 2015 15:15:47 +0100 Subject: [PATCH] vxlan: advertise netns of vxlan dev in fdb msg 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 Signed-off-by: David S. Miller --- drivers/net/vxlan.c | 5 +++++ include/uapi/linux/neighbour.h | 1 + net/core/net_namespace.c | 1 + 3 files changed, 7 insertions(+) diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 0346eaa6d236..19d3664ab9dd 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -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; diff --git a/include/uapi/linux/neighbour.h b/include/uapi/linux/neighbour.h index f3d77f9f1e0b..38f236853cc0 100644 --- a/include/uapi/linux/neighbour.h +++ b/include/uapi/linux/neighbour.h @@ -25,6 +25,7 @@ enum { NDA_VNI, NDA_IFINDEX, NDA_MASTER, + NDA_NDM_IFINDEX_NETNSID, __NDA_MAX }; diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index 9d1a4cac83b6..b7bde551ef76 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -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) {