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path: root/drivers/net/geneve.c
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Diffstat (limited to 'drivers/net/geneve.c')
-rw-r--r--drivers/net/geneve.c55
1 files changed, 47 insertions, 8 deletions
diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index 4dc457489770..7c53e06b31c3 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 {
@@ -875,8 +876,8 @@ 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);
@@ -890,6 +891,8 @@ 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)
@@ -897,8 +900,22 @@ 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))
@@ -1145,6 +1162,7 @@ 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[],
@@ -1180,6 +1198,16 @@ 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;
}
@@ -1225,7 +1253,7 @@ 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);
@@ -1275,6 +1303,7 @@ 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)
@@ -1294,7 +1323,7 @@ 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;
@@ -1382,6 +1411,9 @@ 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;
@@ -1500,6 +1532,7 @@ 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;
@@ -1508,12 +1541,12 @@ 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;
@@ -1576,6 +1609,7 @@ 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;
@@ -1591,7 +1625,7 @@ 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;
@@ -1624,6 +1658,7 @@ 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 */
@@ -1672,6 +1707,9 @@ 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;
@@ -1723,7 +1761,8 @@ struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
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.