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path: root/drivers/net/vxlan.c
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Diffstat (limited to 'drivers/net/vxlan.c')
-rw-r--r--drivers/net/vxlan.c72
1 files changed, 32 insertions, 40 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index da4e3d6632f6..6e65832051d6 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1811,7 +1811,7 @@ static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan,
fl4.flowi4_mark = skb->mark;
fl4.flowi4_proto = IPPROTO_UDP;
fl4.daddr = daddr;
- fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr;
+ fl4.saddr = *saddr;
rt = ip_route_output_key(vxlan->net, &fl4);
if (!IS_ERR(rt)) {
@@ -1847,7 +1847,7 @@ static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_oif = oif;
fl6.daddr = *daddr;
- fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr;
+ fl6.saddr = *saddr;
fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label);
fl6.flowi6_mark = skb->mark;
fl6.flowi6_proto = IPPROTO_UDP;
@@ -1920,7 +1920,8 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
struct rtable *rt = NULL;
const struct iphdr *old_iph;
union vxlan_addr *dst;
- union vxlan_addr remote_ip;
+ union vxlan_addr remote_ip, local_ip;
+ union vxlan_addr *src;
struct vxlan_metadata _md;
struct vxlan_metadata *md = &_md;
__be16 src_port = 0, dst_port;
@@ -1938,6 +1939,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
vni = rdst->remote_vni;
dst = &rdst->remote_ip;
+ src = &vxlan->cfg.saddr;
dst_cache = &rdst->dst_cache;
} else {
if (!info) {
@@ -1948,11 +1950,15 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
vni = vxlan_tun_id_to_vni(info->key.tun_id);
remote_ip.sa.sa_family = ip_tunnel_info_af(info);
- if (remote_ip.sa.sa_family == AF_INET)
+ if (remote_ip.sa.sa_family == AF_INET) {
remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
- else
+ local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src;
+ } else {
remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
+ local_ip.sin6.sin6_addr = info->key.u.ipv6.src;
+ }
dst = &remote_ip;
+ src = &local_ip;
dst_cache = &info->dst_cache;
}
@@ -1992,15 +1998,14 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
}
if (dst->sa.sa_family == AF_INET) {
- __be32 saddr;
-
if (!vxlan->vn4_sock)
goto drop;
sk = vxlan->vn4_sock->sock->sk;
rt = vxlan_get_route(vxlan, skb,
rdst ? rdst->remote_ifindex : 0, tos,
- dst->sin.sin_addr.s_addr, &saddr,
+ dst->sin.sin_addr.s_addr,
+ &src->sin.sin_addr.s_addr,
dst_cache, info);
if (IS_ERR(rt)) {
netdev_dbg(dev, "no route to %pI4\n",
@@ -2017,7 +2022,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
}
/* Bypass encapsulation if the destination is local */
- if (rt->rt_flags & RTCF_LOCAL &&
+ if (!info && rt->rt_flags & RTCF_LOCAL &&
!(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
struct vxlan_dev *dst_vxlan;
@@ -2043,13 +2048,12 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
if (err < 0)
goto xmit_tx_error;
- udp_tunnel_xmit_skb(rt, sk, skb, saddr,
+ udp_tunnel_xmit_skb(rt, sk, skb, src->sin.sin_addr.s_addr,
dst->sin.sin_addr.s_addr, tos, ttl, df,
src_port, dst_port, xnet, !udp_sum);
#if IS_ENABLED(CONFIG_IPV6)
} else {
struct dst_entry *ndst;
- struct in6_addr saddr;
u32 rt6i_flags;
if (!vxlan->vn6_sock)
@@ -2058,7 +2062,8 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
ndst = vxlan6_get_route(vxlan, skb,
rdst ? rdst->remote_ifindex : 0, tos,
- label, &dst->sin6.sin6_addr, &saddr,
+ label, &dst->sin6.sin6_addr,
+ &src->sin6.sin6_addr,
dst_cache, info);
if (IS_ERR(ndst)) {
netdev_dbg(dev, "no route to %pI6\n",
@@ -2077,7 +2082,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
/* Bypass encapsulation if the destination is local */
rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
- if (rt6i_flags & RTF_LOCAL &&
+ if (!info && rt6i_flags & RTF_LOCAL &&
!(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
struct vxlan_dev *dst_vxlan;
@@ -2104,7 +2109,8 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
return;
}
udp_tunnel6_xmit_skb(ndst, sk, skb, dev,
- &saddr, &dst->sin6.sin6_addr, tos, ttl,
+ &src->sin6.sin6_addr,
+ &dst->sin6.sin6_addr, tos, ttl,
label, src_port, dst_port, !udp_sum);
#endif
}
@@ -2776,14 +2782,15 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
struct net_device *lowerdev = NULL;
if (conf->flags & VXLAN_F_GPE) {
- if (conf->flags & ~VXLAN_F_ALLOWED_GPE)
- return -EINVAL;
/* For now, allow GPE only together with COLLECT_METADATA.
* This can be relaxed later; in such case, the other side
* of the PtP link will have to be provided.
*/
- if (!(conf->flags & VXLAN_F_COLLECT_METADATA))
+ if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) ||
+ !(conf->flags & VXLAN_F_COLLECT_METADATA)) {
+ pr_info("unsupported combination of extensions\n");
return -EINVAL;
+ }
vxlan_raw_setup(dev);
} else {
@@ -2836,6 +2843,9 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
needed_headroom = lowerdev->hard_header_len;
+ } else if (vxlan_addr_multicast(&dst->remote_ip)) {
+ pr_info("multicast destination requires interface to be specified\n");
+ return -EINVAL;
}
if (conf->mtu) {
@@ -2868,8 +2878,10 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
tmp->cfg.saddr.sa.sa_family == AF_INET6) == use_ipv6 &&
tmp->cfg.dst_port == vxlan->cfg.dst_port &&
(tmp->flags & VXLAN_F_RCV_FLAGS) ==
- (vxlan->flags & VXLAN_F_RCV_FLAGS))
- return -EEXIST;
+ (vxlan->flags & VXLAN_F_RCV_FLAGS)) {
+ pr_info("duplicate VNI %u\n", be32_to_cpu(conf->vni));
+ return -EEXIST;
+ }
}
dev->ethtool_ops = &vxlan_ethtool_ops;
@@ -2903,7 +2915,6 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[])
{
struct vxlan_config conf;
- int err;
memset(&conf, 0, sizeof(conf));
@@ -3012,26 +3023,7 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev,
if (tb[IFLA_MTU])
conf.mtu = nla_get_u32(tb[IFLA_MTU]);
- err = vxlan_dev_configure(src_net, dev, &conf);
- switch (err) {
- case -ENODEV:
- pr_info("ifindex %d does not exist\n", conf.remote_ifindex);
- break;
-
- case -EPERM:
- pr_info("IPv6 is disabled via sysctl\n");
- break;
-
- case -EEXIST:
- pr_info("duplicate VNI %u\n", be32_to_cpu(conf.vni));
- break;
-
- case -EINVAL:
- pr_info("unsupported combination of extensions\n");
- break;
- }
-
- return err;
+ return vxlan_dev_configure(src_net, dev, &conf);
}
static void vxlan_dellink(struct net_device *dev, struct list_head *head)
generated by cgit (git 2.34.1) at 2024-06-04 14:29:58 +0000