aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/geneve.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/geneve.c')
-rw-r--r--drivers/net/geneve.c111
1 files changed, 102 insertions, 9 deletions
diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index a0cd1c41cf5f..58bbba8582b0 100644
--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -70,6 +70,7 @@ struct geneve_dev {
bool collect_md;
bool use_udp6_rx_checksums;
bool ttl_inherit;
+ enum ifla_geneve_df df;
};
struct geneve_sock {
@@ -387,6 +388,59 @@ drop:
return 0;
}
+/* Callback from net/ipv{4,6}/udp.c to check that we have a tunnel for errors */
+static int geneve_udp_encap_err_lookup(struct sock *sk, struct sk_buff *skb)
+{
+ struct genevehdr *geneveh;
+ struct geneve_sock *gs;
+ u8 zero_vni[3] = { 0 };
+ u8 *vni = zero_vni;
+
+ if (skb->len < GENEVE_BASE_HLEN)
+ return -EINVAL;
+
+ geneveh = geneve_hdr(skb);
+ if (geneveh->ver != GENEVE_VER)
+ return -EINVAL;
+
+ if (geneveh->proto_type != htons(ETH_P_TEB))
+ return -EINVAL;
+
+ gs = rcu_dereference_sk_user_data(sk);
+ if (!gs)
+ return -ENOENT;
+
+ if (geneve_get_sk_family(gs) == AF_INET) {
+ struct iphdr *iph = ip_hdr(skb);
+ __be32 addr4 = 0;
+
+ if (!gs->collect_md) {
+ vni = geneve_hdr(skb)->vni;
+ addr4 = iph->daddr;
+ }
+
+ return geneve_lookup(gs, addr4, vni) ? 0 : -ENOENT;
+ }
+
+#if IS_ENABLED(CONFIG_IPV6)
+ if (geneve_get_sk_family(gs) == AF_INET6) {
+ struct ipv6hdr *ip6h = ipv6_hdr(skb);
+ struct in6_addr addr6;
+
+ memset(&addr6, 0, sizeof(struct in6_addr));
+
+ if (!gs->collect_md) {
+ vni = geneve_hdr(skb)->vni;
+ addr6 = ip6h->daddr;
+ }
+
+ return geneve6_lookup(gs, addr6, vni) ? 0 : -ENOENT;
+ }
+#endif
+
+ return -EPFNOSUPPORT;
+}
+
static struct socket *geneve_create_sock(struct net *net, bool ipv6,
__be16 port, bool ipv6_rx_csum)
{
@@ -544,6 +598,7 @@ static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
tunnel_cfg.gro_receive = geneve_gro_receive;
tunnel_cfg.gro_complete = geneve_gro_complete;
tunnel_cfg.encap_rcv = geneve_udp_encap_recv;
+ tunnel_cfg.encap_err_lookup = geneve_udp_encap_err_lookup;
tunnel_cfg.encap_destroy = NULL;
setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
list_add(&gs->list, &gn->sock_list);
@@ -823,8 +878,8 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
struct rtable *rt;
struct flowi4 fl4;
__u8 tos, ttl;
+ __be16 df = 0;
__be16 sport;
- __be16 df;
int err;
rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info);
@@ -838,6 +893,8 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
if (geneve->collect_md) {
tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
ttl = key->ttl;
+
+ df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
} else {
tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb);
if (geneve->ttl_inherit)
@@ -845,8 +902,22 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
else
ttl = key->ttl;
ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
+
+ if (geneve->df == GENEVE_DF_SET) {
+ df = htons(IP_DF);
+ } else if (geneve->df == GENEVE_DF_INHERIT) {
+ struct ethhdr *eth = eth_hdr(skb);
+
+ if (ntohs(eth->h_proto) == ETH_P_IPV6) {
+ df = htons(IP_DF);
+ } else if (ntohs(eth->h_proto) == ETH_P_IP) {
+ struct iphdr *iph = ip_hdr(skb);
+
+ if (iph->frag_off & htons(IP_DF))
+ df = htons(IP_DF);
+ }
+ }
}
- df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
err = geneve_build_skb(&rt->dst, skb, info, xnet, sizeof(struct iphdr));
if (unlikely(err))
@@ -1093,6 +1164,7 @@ static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
[IFLA_GENEVE_TTL_INHERIT] = { .type = NLA_U8 },
+ [IFLA_GENEVE_DF] = { .type = NLA_U8 },
};
static int geneve_validate(struct nlattr *tb[], struct nlattr *data[],
@@ -1128,6 +1200,16 @@ static int geneve_validate(struct nlattr *tb[], struct nlattr *data[],
}
}
+ if (data[IFLA_GENEVE_DF]) {
+ enum ifla_geneve_df df = nla_get_u8(data[IFLA_GENEVE_DF]);
+
+ if (df < 0 || df > GENEVE_DF_MAX) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_GENEVE_DF],
+ "Invalid DF attribute");
+ return -EINVAL;
+ }
+ }
+
return 0;
}
@@ -1173,7 +1255,7 @@ static int geneve_configure(struct net *net, struct net_device *dev,
struct netlink_ext_ack *extack,
const struct ip_tunnel_info *info,
bool metadata, bool ipv6_rx_csum,
- bool ttl_inherit)
+ bool ttl_inherit, enum ifla_geneve_df df)
{
struct geneve_net *gn = net_generic(net, geneve_net_id);
struct geneve_dev *t, *geneve = netdev_priv(dev);
@@ -1223,6 +1305,7 @@ static int geneve_configure(struct net *net, struct net_device *dev,
geneve->collect_md = metadata;
geneve->use_udp6_rx_checksums = ipv6_rx_csum;
geneve->ttl_inherit = ttl_inherit;
+ geneve->df = df;
err = register_netdevice(dev);
if (err)
@@ -1242,7 +1325,7 @@ static int geneve_nl2info(struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack,
struct ip_tunnel_info *info, bool *metadata,
bool *use_udp6_rx_checksums, bool *ttl_inherit,
- bool changelink)
+ enum ifla_geneve_df *df, bool changelink)
{
int attrtype;
@@ -1330,6 +1413,9 @@ static int geneve_nl2info(struct nlattr *tb[], struct nlattr *data[],
if (data[IFLA_GENEVE_TOS])
info->key.tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
+ if (data[IFLA_GENEVE_DF])
+ *df = nla_get_u8(data[IFLA_GENEVE_DF]);
+
if (data[IFLA_GENEVE_LABEL]) {
info->key.label = nla_get_be32(data[IFLA_GENEVE_LABEL]) &
IPV6_FLOWLABEL_MASK;
@@ -1448,6 +1534,7 @@ static int geneve_newlink(struct net *net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
+ enum ifla_geneve_df df = GENEVE_DF_UNSET;
bool use_udp6_rx_checksums = false;
struct ip_tunnel_info info;
bool ttl_inherit = false;
@@ -1456,12 +1543,12 @@ static int geneve_newlink(struct net *net, struct net_device *dev,
init_tnl_info(&info, GENEVE_UDP_PORT);
err = geneve_nl2info(tb, data, extack, &info, &metadata,
- &use_udp6_rx_checksums, &ttl_inherit, false);
+ &use_udp6_rx_checksums, &ttl_inherit, &df, false);
if (err)
return err;
err = geneve_configure(net, dev, extack, &info, metadata,
- use_udp6_rx_checksums, ttl_inherit);
+ use_udp6_rx_checksums, ttl_inherit, df);
if (err)
return err;
@@ -1524,6 +1611,7 @@ static int geneve_changelink(struct net_device *dev, struct nlattr *tb[],
struct ip_tunnel_info info;
bool metadata;
bool use_udp6_rx_checksums;
+ enum ifla_geneve_df df;
bool ttl_inherit;
int err;
@@ -1539,7 +1627,7 @@ static int geneve_changelink(struct net_device *dev, struct nlattr *tb[],
use_udp6_rx_checksums = geneve->use_udp6_rx_checksums;
ttl_inherit = geneve->ttl_inherit;
err = geneve_nl2info(tb, data, extack, &info, &metadata,
- &use_udp6_rx_checksums, &ttl_inherit, true);
+ &use_udp6_rx_checksums, &ttl_inherit, &df, true);
if (err)
return err;
@@ -1572,6 +1660,7 @@ static size_t geneve_get_size(const struct net_device *dev)
nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */
nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */
nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */
+ nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_DF */
nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */
nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */
nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */
@@ -1620,6 +1709,9 @@ static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
nla_put_be32(skb, IFLA_GENEVE_LABEL, info->key.label))
goto nla_put_failure;
+ if (nla_put_u8(skb, IFLA_GENEVE_DF, geneve->df))
+ goto nla_put_failure;
+
if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst))
goto nla_put_failure;
@@ -1666,12 +1758,13 @@ struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
memset(tb, 0, sizeof(tb));
dev = rtnl_create_link(net, name, name_assign_type,
- &geneve_link_ops, tb);
+ &geneve_link_ops, tb, NULL);
if (IS_ERR(dev))
return dev;
init_tnl_info(&info, dst_port);
- err = geneve_configure(net, dev, NULL, &info, true, true, false);
+ err = geneve_configure(net, dev, NULL, &info,
+ true, true, false, GENEVE_DF_UNSET);
if (err) {
free_netdev(dev);
return ERR_PTR(err);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.