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authorRoopa Prabhu <roopa@nvidia.com>2022-03-01 05:04:33 +0000
committerDavid S. Miller <davem@davemloft.net>2022-03-01 08:38:02 +0000
commitefe0f94b333bf73dae0649937d40fbb15b3165e1 (patch)
treea81f05b86cc3339b27c18e815797e81dce9f6577 /drivers/net/vxlan
parenta9508d121a0ec3ba53a32f8c197223cbf19074c2 (diff)
downloadlinux-efe0f94b333bf73dae0649937d40fbb15b3165e1.tar.bz2
vxlan_core: add helper vxlan_vni_in_use
more users in follow up patches Signed-off-by: Roopa Prabhu <roopa@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vxlan')
-rw-r--r--drivers/net/vxlan/vxlan_core.c46
1 files changed, 28 insertions, 18 deletions
diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index df8ef919216c..8c193d47c1e4 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -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;