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vxlan_core: add helper vxlan_vni_in_use

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more users in follow up patches

Signed-off-by: Roopa Prabhu <roopa@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu 2022-03-01 05:04:33 +00:00 committed by David S. Miller
parent a9508d121a
commit efe0f94b33
1 changed files with 28 additions and 18 deletions
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46
drivers/net/vxlan/vxlan_core.c
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@ -3554,13 +3554,38 @@ static int vxlan_sock_add(struct vxlan_dev *vxlan)
return ret;
}
static int vxlan_vni_in_use(struct net *src_net, struct vxlan_dev *vxlan,
struct vxlan_config *conf, __be32 vni)
{
struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
struct vxlan_dev *tmp;
list_for_each_entry(tmp, &vn->vxlan_list, next) {
if (tmp == vxlan)
continue;
if (tmp->cfg.vni != vni)
continue;
if (tmp->cfg.dst_port != conf->dst_port)
continue;
if ((tmp->cfg.flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)) !=
(conf->flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)))
continue;
if ((conf->flags & VXLAN_F_IPV6_LINKLOCAL) &&
tmp->cfg.remote_ifindex != conf->remote_ifindex)
continue;
return -EEXIST;
}
return 0;
}
static int vxlan_config_validate(struct net *src_net, struct vxlan_config *conf,
struct net_device **lower,
struct vxlan_dev *old,
struct netlink_ext_ack *extack)
{
struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
struct vxlan_dev *tmp;
bool use_ipv6 = false;
if (conf->flags & VXLAN_F_GPE) {
@ -3693,22 +3718,7 @@ static int vxlan_config_validate(struct net *src_net, struct vxlan_config *conf,
if (!conf->age_interval)
conf->age_interval = FDB_AGE_DEFAULT;
list_for_each_entry(tmp, &vn->vxlan_list, next) {
if (tmp == old)
continue;
if (tmp->cfg.vni != conf->vni)
continue;
if (tmp->cfg.dst_port != conf->dst_port)
continue;
if ((tmp->cfg.flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)) !=
(conf->flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)))
continue;
if ((conf->flags & VXLAN_F_IPV6_LINKLOCAL) &&
tmp->cfg.remote_ifindex != conf->remote_ifindex)
continue;
if (vxlan_vni_in_use(src_net, old, conf, conf->vni)) {
NL_SET_ERR_MSG(extack,
"A VXLAN device with the specified VNI already exists");
return -EEXIST;