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-rw-r--r--include/uapi/linux/if_tunnel.h1
-rw-r--r--net/ipv4/ipip.c6
2 files changed, 6 insertions, 1 deletions
diff --git a/include/uapi/linux/if_tunnel.h b/include/uapi/linux/if_tunnel.h
index f5ea6b7b651f..5ab0c8ddc2bc 100644
--- a/include/uapi/linux/if_tunnel.h
+++ b/include/uapi/linux/if_tunnel.h
@@ -48,6 +48,7 @@ enum {
IFLA_IPTUN_FLOWINFO,
IFLA_IPTUN_FLAGS,
IFLA_IPTUN_PROTO,
+ IFLA_IPTUN_PMTUDISC,
__IFLA_IPTUN_MAX,
};
#define IFLA_IPTUN_MAX (__IFLA_IPTUN_MAX - 1)
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 4be88cc98957..1fc0ea4786b9 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -835,6 +835,8 @@ static size_t ipip_get_size(const struct net_device *dev)
nla_total_size(1) +
/* IFLA_IPTUN_TOS */
nla_total_size(1) +
+ /* IFLA_IPTUN_PMTUDISC */
+ nla_total_size(1) +
0;
}
@@ -847,7 +849,9 @@ static int ipip_fill_info(struct sk_buff *skb, const struct net_device *dev)
nla_put_be32(skb, IFLA_IPTUN_LOCAL, parm->iph.saddr) ||
nla_put_be32(skb, IFLA_IPTUN_REMOTE, parm->iph.daddr) ||
nla_put_u8(skb, IFLA_IPTUN_TTL, parm->iph.ttl) ||
- nla_put_u8(skb, IFLA_IPTUN_TOS, parm->iph.tos))
+ nla_put_u8(skb, IFLA_IPTUN_TOS, parm->iph.tos) ||
+ nla_put_u8(skb, IFLA_IPTUN_PMTUDISC,
+ !!(parm->iph.frag_off & htons(IP_DF))))
goto nla_put_failure;
return 0;