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geneve: handle ipv6 priority like ipv4 tos

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Other callers of udp_tunnel6_xmit_skb just pass 0 for the prio
argument.  Jesse Gross <jesse@nicira.com> suggested that prio is really
the same as IPv4's tos and should be handled the same, so this is my
interpretation of that suggestion.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Reported-by: Jesse Gross <jesse@nicira.com>
Reviewed-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John W. Linville 2015-10-26 17:01:45 -04:00 committed by David S. Miller
parent 8ed66f0e82
commit 3a56f86f1b
1 changed files with 17 additions and 2 deletions
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19
drivers/net/geneve.c
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@ -763,6 +763,7 @@ static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
struct geneve_dev *geneve = netdev_priv(dev);
struct geneve_sock *gs6 = geneve->sock6;
struct dst_entry *dst = NULL;
__u8 prio;
memset(fl6, 0, sizeof(*fl6));
fl6->flowi6_mark = skb->mark;
@ -771,7 +772,16 @@ static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
if (info) {
fl6->daddr = info->key.u.ipv6.dst;
fl6->saddr = info->key.u.ipv6.src;
fl6->flowi6_tos = RT_TOS(info->key.tos);
} else {
prio = geneve->tos;
if (prio == 1) {
const struct iphdr *iip = ip_hdr(skb);
prio = ip_tunnel_get_dsfield(iip, skb);
}
fl6->flowi6_tos = RT_TOS(prio);
fl6->daddr = geneve->remote.sin6.sin6_addr;
}
@ -897,9 +907,10 @@ static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
struct geneve_dev *geneve = netdev_priv(dev);
struct geneve_sock *gs6 = geneve->sock6;
struct dst_entry *dst = NULL;
const struct iphdr *iip; /* interior IP header */
int err = -EINVAL;
struct flowi6 fl6;
__u8 ttl;
__u8 prio, ttl;
__be16 sport;
bool udp_csum;
bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
@ -920,6 +931,8 @@ static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
skb_reset_mac_header(skb);
iip = ip_hdr(skb);
if (info) {
const struct ip_tunnel_key *key = &info->key;
u8 *opts = NULL;
@ -936,6 +949,7 @@ static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
if (unlikely(err))
goto err;
prio = ip_tunnel_ecn_encap(key->tos, iip, skb);
ttl = key->ttl;
} else {
udp_csum = false;
@ -944,13 +958,14 @@ static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
if (unlikely(err))
goto err;
prio = ip_tunnel_ecn_encap(fl6.flowi6_tos, iip, skb);
ttl = geneve->ttl;
if (!ttl && ipv6_addr_is_multicast(&fl6.daddr))
ttl = 1;
ttl = ttl ? : ip6_dst_hoplimit(dst);
}
err = udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev,
&fl6.saddr, &fl6.daddr, 0, ttl,
&fl6.saddr, &fl6.daddr, prio, ttl,
sport, geneve->dst_port, !udp_csum);
iptunnel_xmit_stats(err, &dev->stats, dev->tstats);