vxlan: add changelink support
This patch adds changelink rtnl op support for vxlan netdevs.
code changes involve:
- refactor vxlan_newlink into vxlan_nl2conf to be
used by vxlan_newlink and vxlan_changelink
- vxlan_nl2conf and vxlan_dev_configure take a
changelink argument to isolate changelink checks
and updates.
- Allow changing only a few attributes:
- return -EOPNOTSUPP for attributes that cannot
be changed for now. Incremental patches can
make the non-supported one available in the future
if needed.
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu
David S. Miller
parent
d1892e4ec9
commit
8bcdc4f3a2
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@ -2835,28 +2835,29 @@ static int vxlan_sock_add(struct vxlan_dev *vxlan)
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}
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static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
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struct vxlan_config *conf)
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struct vxlan_config *conf,
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bool changelink)
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{
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struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
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struct vxlan_dev *vxlan = netdev_priv(dev), *tmp;
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struct vxlan_rdst *dst = &vxlan->default_dst;
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unsigned short needed_headroom = ETH_HLEN;
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int err;
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bool use_ipv6 = false;
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__be16 default_port = vxlan->cfg.dst_port;
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struct net_device *lowerdev = NULL;
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if (!changelink) {
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if (conf->flags & VXLAN_F_GPE) {
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/* For now, allow GPE only together with COLLECT_METADATA.
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* This can be relaxed later; in such case, the other side
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* of the PtP link will have to be provided.
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/* For now, allow GPE only together with
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* COLLECT_METADATA. This can be relaxed later; in such
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* case, the other side of the PtP link will have to be
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* provided.
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*/
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if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) ||
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!(conf->flags & VXLAN_F_COLLECT_METADATA)) {
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pr_info("unsupported combination of extensions\n");
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return -EINVAL;
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}
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vxlan_raw_setup(dev);
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} else {
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vxlan_ether_setup(dev);
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@ -2865,8 +2866,8 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
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/* MTU range: 68 - 65535 */
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dev->min_mtu = ETH_MIN_MTU;
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dev->max_mtu = ETH_MAX_MTU;
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vxlan->net = src_net;
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}
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dst->remote_vni = conf->vni;
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@ -2889,12 +2890,14 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
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return -EINVAL;
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}
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if (conf->remote_ifindex) {
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if (conf->remote_ifindex &&
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conf->remote_ifindex != vxlan->cfg.remote_ifindex) {
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lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex);
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dst->remote_ifindex = conf->remote_ifindex;
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if (!lowerdev) {
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pr_info("ifindex %d does not exist\n", dst->remote_ifindex);
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pr_info("ifindex %d does not exist\n",
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dst->remote_ifindex);
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return -ENODEV;
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}
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@ -2913,7 +2916,8 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
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(use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
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needed_headroom = lowerdev->hard_header_len;
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} else if (vxlan_addr_multicast(&dst->remote_ip)) {
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} else if (!conf->remote_ifindex &&
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vxlan_addr_multicast(&dst->remote_ip)) {
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pr_info("multicast destination requires interface to be specified\n");
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return -EINVAL;
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}
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@ -2953,6 +2957,9 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
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if (!vxlan->cfg.age_interval)
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vxlan->cfg.age_interval = FDB_AGE_DEFAULT;
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if (changelink)
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return 0;
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list_for_each_entry(tmp, &vn->vxlan_list, next) {
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if (tmp->cfg.vni == conf->vni &&
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(tmp->default_dst.remote_ip.sa.sa_family == AF_INET6 ||
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@ -2965,6 +2972,218 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
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}
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}
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return 0;
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}
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static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
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struct net_device *dev, struct vxlan_config *conf,
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bool changelink)
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{
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struct vxlan_dev *vxlan = netdev_priv(dev);
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memset(conf, 0, sizeof(*conf));
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/* if changelink operation, start with old existing cfg */
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if (changelink)
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memcpy(conf, &vxlan->cfg, sizeof(*conf));
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if (data[IFLA_VXLAN_ID]) {
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__be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
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if (changelink && (vni != conf->vni))
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return -EOPNOTSUPP;
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conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
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}
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if (data[IFLA_VXLAN_GROUP]) {
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conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
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} else if (data[IFLA_VXLAN_GROUP6]) {
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if (!IS_ENABLED(CONFIG_IPV6))
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return -EPFNOSUPPORT;
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conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
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conf->remote_ip.sa.sa_family = AF_INET6;
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}
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if (data[IFLA_VXLAN_LOCAL]) {
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conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
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conf->saddr.sa.sa_family = AF_INET;
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} else if (data[IFLA_VXLAN_LOCAL6]) {
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if (!IS_ENABLED(CONFIG_IPV6))
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return -EPFNOSUPPORT;
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/* TODO: respect scope id */
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conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
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conf->saddr.sa.sa_family = AF_INET6;
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}
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if (data[IFLA_VXLAN_LINK])
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conf->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
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if (data[IFLA_VXLAN_TOS])
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conf->tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
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if (data[IFLA_VXLAN_TTL])
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conf->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
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if (data[IFLA_VXLAN_LABEL])
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conf->label = nla_get_be32(data[IFLA_VXLAN_LABEL]) &
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IPV6_FLOWLABEL_MASK;
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if (data[IFLA_VXLAN_LEARNING]) {
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if (nla_get_u8(data[IFLA_VXLAN_LEARNING])) {
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conf->flags |= VXLAN_F_LEARN;
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} else {
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conf->flags &= ~VXLAN_F_LEARN;
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vxlan->flags &= ~VXLAN_F_LEARN;
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}
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} else if (!changelink) {
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/* default to learn on a new device */
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conf->flags |= VXLAN_F_LEARN;
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}
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if (data[IFLA_VXLAN_AGEING]) {
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if (changelink)
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return -EOPNOTSUPP;
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conf->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
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}
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if (data[IFLA_VXLAN_PROXY]) {
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if (changelink)
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return -EOPNOTSUPP;
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if (nla_get_u8(data[IFLA_VXLAN_PROXY]))
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conf->flags |= VXLAN_F_PROXY;
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}
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if (data[IFLA_VXLAN_RSC]) {
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if (changelink)
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return -EOPNOTSUPP;
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if (nla_get_u8(data[IFLA_VXLAN_RSC]))
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conf->flags |= VXLAN_F_RSC;
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}
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if (data[IFLA_VXLAN_L2MISS]) {
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if (changelink)
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return -EOPNOTSUPP;
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if (nla_get_u8(data[IFLA_VXLAN_L2MISS]))
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conf->flags |= VXLAN_F_L2MISS;
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}
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if (data[IFLA_VXLAN_L3MISS]) {
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if (changelink)
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return -EOPNOTSUPP;
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if (nla_get_u8(data[IFLA_VXLAN_L3MISS]))
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conf->flags |= VXLAN_F_L3MISS;
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}
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if (data[IFLA_VXLAN_LIMIT]) {
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if (changelink)
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return -EOPNOTSUPP;
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conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
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}
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if (data[IFLA_VXLAN_COLLECT_METADATA]) {
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if (changelink)
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return -EOPNOTSUPP;
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if (nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
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conf->flags |= VXLAN_F_COLLECT_METADATA;
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}
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if (data[IFLA_VXLAN_PORT_RANGE]) {
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if (!changelink) {
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const struct ifla_vxlan_port_range *p
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= nla_data(data[IFLA_VXLAN_PORT_RANGE]);
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conf->port_min = ntohs(p->low);
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conf->port_max = ntohs(p->high);
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} else {
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return -EOPNOTSUPP;
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}
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}
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if (data[IFLA_VXLAN_PORT]) {
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if (changelink)
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return -EOPNOTSUPP;
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conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
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}
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if (data[IFLA_VXLAN_UDP_CSUM]) {
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if (changelink)
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return -EOPNOTSUPP;
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if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
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conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX;
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}
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if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) {
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if (changelink)
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return -EOPNOTSUPP;
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if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
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conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
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}
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if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) {
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if (changelink)
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return -EOPNOTSUPP;
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if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
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conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
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}
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if (data[IFLA_VXLAN_REMCSUM_TX]) {
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if (changelink)
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return -EOPNOTSUPP;
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if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
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conf->flags |= VXLAN_F_REMCSUM_TX;
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}
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if (data[IFLA_VXLAN_REMCSUM_RX]) {
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if (changelink)
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return -EOPNOTSUPP;
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if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
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conf->flags |= VXLAN_F_REMCSUM_RX;
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}
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if (data[IFLA_VXLAN_GBP]) {
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if (changelink)
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return -EOPNOTSUPP;
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conf->flags |= VXLAN_F_GBP;
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}
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if (data[IFLA_VXLAN_GPE]) {
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if (changelink)
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return -EOPNOTSUPP;
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conf->flags |= VXLAN_F_GPE;
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}
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if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) {
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if (changelink)
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return -EOPNOTSUPP;
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conf->flags |= VXLAN_F_REMCSUM_NOPARTIAL;
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}
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if (tb[IFLA_MTU]) {
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if (changelink)
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return -EOPNOTSUPP;
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conf->mtu = nla_get_u32(tb[IFLA_MTU]);
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}
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return 0;
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}
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static int vxlan_newlink(struct net *src_net, struct net_device *dev,
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struct nlattr *tb[], struct nlattr *data[])
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{
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struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
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struct vxlan_dev *vxlan = netdev_priv(dev);
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struct vxlan_config conf;
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int err;
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err = vxlan_nl2conf(tb, data, dev, &conf, false);
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if (err)
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return err;
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err = vxlan_dev_configure(src_net, dev, &conf, false);
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if (err)
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return err;
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dev->ethtool_ops = &vxlan_ethtool_ops;
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/* create an fdb entry for a valid default destination */
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@ -2984,7 +3203,7 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
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err = register_netdevice(dev);
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if (err) {
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vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni);
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vxlan_fdb_delete_default(vxlan, vxlan->default_dst.remote_vni);
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return err;
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}
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@ -2993,119 +3212,56 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
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return 0;
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}
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static int vxlan_newlink(struct net *src_net, struct net_device *dev,
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struct nlattr *tb[], struct nlattr *data[])
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static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
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struct nlattr *data[])
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{
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struct vxlan_dev *vxlan = netdev_priv(dev);
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struct vxlan_rdst *dst = &vxlan->default_dst;
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struct vxlan_rdst old_dst;
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struct vxlan_config conf;
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int err;
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memset(&conf, 0, sizeof(conf));
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err = vxlan_nl2conf(tb, data,
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dev, &conf, true);
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if (err)
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return err;
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if (data[IFLA_VXLAN_ID])
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conf.vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
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memcpy(&old_dst, dst, sizeof(struct vxlan_rdst));
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if (data[IFLA_VXLAN_GROUP]) {
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conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
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} else if (data[IFLA_VXLAN_GROUP6]) {
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if (!IS_ENABLED(CONFIG_IPV6))
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return -EPFNOSUPPORT;
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err = vxlan_dev_configure(vxlan->net, dev, &conf, true);
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if (err)
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return err;
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conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
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conf.remote_ip.sa.sa_family = AF_INET6;
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/* handle default dst entry */
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if (!vxlan_addr_equal(&dst->remote_ip, &old_dst.remote_ip)) {
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spin_lock_bh(&vxlan->hash_lock);
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if (!vxlan_addr_any(&old_dst.remote_ip))
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__vxlan_fdb_delete(vxlan, all_zeros_mac,
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old_dst.remote_ip,
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vxlan->cfg.dst_port,
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old_dst.remote_vni,
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old_dst.remote_vni,
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old_dst.remote_ifindex, 0);
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if (!vxlan_addr_any(&dst->remote_ip)) {
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err = vxlan_fdb_create(vxlan, all_zeros_mac,
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&dst->remote_ip,
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NUD_REACHABLE | NUD_PERMANENT,
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NLM_F_CREATE | NLM_F_APPEND,
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vxlan->cfg.dst_port,
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dst->remote_vni,
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dst->remote_vni,
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dst->remote_ifindex,
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NTF_SELF);
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if (err) {
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spin_unlock_bh(&vxlan->hash_lock);
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return err;
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}
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}
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spin_unlock_bh(&vxlan->hash_lock);
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}
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if (data[IFLA_VXLAN_LOCAL]) {
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conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
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conf.saddr.sa.sa_family = AF_INET;
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} else if (data[IFLA_VXLAN_LOCAL6]) {
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if (!IS_ENABLED(CONFIG_IPV6))
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return -EPFNOSUPPORT;
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/* TODO: respect scope id */
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conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
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conf.saddr.sa.sa_family = AF_INET6;
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}
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if (data[IFLA_VXLAN_LINK])
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conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
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if (data[IFLA_VXLAN_TOS])
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conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
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if (data[IFLA_VXLAN_TTL])
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conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
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if (data[IFLA_VXLAN_LABEL])
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conf.label = nla_get_be32(data[IFLA_VXLAN_LABEL]) &
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IPV6_FLOWLABEL_MASK;
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if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING]))
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conf.flags |= VXLAN_F_LEARN;
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if (data[IFLA_VXLAN_AGEING])
|
||||
conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
|
||||
|
||||
if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
|
||||
conf.flags |= VXLAN_F_PROXY;
|
||||
|
||||
if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
|
||||
conf.flags |= VXLAN_F_RSC;
|
||||
|
||||
if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
|
||||
conf.flags |= VXLAN_F_L2MISS;
|
||||
|
||||
if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
|
||||
conf.flags |= VXLAN_F_L3MISS;
|
||||
|
||||
if (data[IFLA_VXLAN_LIMIT])
|
||||
conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
|
||||
|
||||
if (data[IFLA_VXLAN_COLLECT_METADATA] &&
|
||||
nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
|
||||
conf.flags |= VXLAN_F_COLLECT_METADATA;
|
||||
|
||||
if (data[IFLA_VXLAN_PORT_RANGE]) {
|
||||
const struct ifla_vxlan_port_range *p
|
||||
= nla_data(data[IFLA_VXLAN_PORT_RANGE]);
|
||||
conf.port_min = ntohs(p->low);
|
||||
conf.port_max = ntohs(p->high);
|
||||
}
|
||||
|
||||
if (data[IFLA_VXLAN_PORT])
|
||||
conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
|
||||
|
||||
if (data[IFLA_VXLAN_UDP_CSUM] &&
|
||||
!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
|
||||
conf.flags |= VXLAN_F_UDP_ZERO_CSUM_TX;
|
||||
|
||||
if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
|
||||
nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
|
||||
conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
|
||||
|
||||
if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
|
||||
nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
|
||||
conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
|
||||
|
||||
if (data[IFLA_VXLAN_REMCSUM_TX] &&
|
||||
nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
|
||||
conf.flags |= VXLAN_F_REMCSUM_TX;
|
||||
|
||||
if (data[IFLA_VXLAN_REMCSUM_RX] &&
|
||||
nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
|
||||
conf.flags |= VXLAN_F_REMCSUM_RX;
|
||||
|
||||
if (data[IFLA_VXLAN_GBP])
|
||||
conf.flags |= VXLAN_F_GBP;
|
||||
|
||||
if (data[IFLA_VXLAN_GPE])
|
||||
conf.flags |= VXLAN_F_GPE;
|
||||
|
||||
if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
|
||||
conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL;
|
||||
|
||||
if (tb[IFLA_MTU])
|
||||
conf.mtu = nla_get_u32(tb[IFLA_MTU]);
|
||||
|
||||
return vxlan_dev_configure(src_net, dev, &conf);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void vxlan_dellink(struct net_device *dev, struct list_head *head)
|
||||
|
|
@ -3261,6 +3417,7 @@ static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
|
|||
.setup = vxlan_setup,
|
||||
.validate = vxlan_validate,
|
||||
.newlink = vxlan_newlink,
|
||||
.changelink = vxlan_changelink,
|
||||
.dellink = vxlan_dellink,
|
||||
.get_size = vxlan_get_size,
|
||||
.fill_info = vxlan_fill_info,
|
||||
|
|
@ -3282,7 +3439,7 @@ struct net_device *vxlan_dev_create(struct net *net, const char *name,
|
|||
if (IS_ERR(dev))
|
||||
return dev;
|
||||
|
||||
err = vxlan_dev_configure(net, dev, conf);
|
||||
err = vxlan_dev_configure(net, dev, conf, false);
|
||||
if (err < 0) {
|
||||
free_netdev(dev);
|
||||
return ERR_PTR(err);
|
||||
|
|
|
|||
Loading…
Reference in New Issue