[PATCH v3 net-next 03/11] gre6: Fix flag translations

[Tom Herbert]

GRE for IPv6 does not properly translate for GRE flags to tunnel
flags and vice versa. This patch fixes that.

Signed-off-by: Tom Herbert <t...@herbertland.com>
---
 net/ipv6/ip6_gre.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 47b671a..70a1f72 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -799,8 +799,8 @@ static void ip6gre_tnl_parm_from_user(struct __ip6_tnl_parm 
*p,
        p->link = u->link;
        p->i_key = u->i_key;
        p->o_key = u->o_key;
-       p->i_flags = u->i_flags;
-       p->o_flags = u->o_flags;
+       p->i_flags = gre_flags_to_tnl_flags(u->i_flags);
+       p->o_flags = gre_flags_to_tnl_flags(u->o_flags);
        memcpy(p->name, u->name, sizeof(u->name));
 }
 
@@ -817,8 +817,8 @@ static void ip6gre_tnl_parm_to_user(struct ip6_tnl_parm2 *u,
        u->link = p->link;
        u->i_key = p->i_key;
        u->o_key = p->o_key;
-       u->i_flags = p->i_flags;
-       u->o_flags = p->o_flags;
+       u->i_flags = gre_tnl_flags_to_gre_flags(p->i_flags);
+       u->o_flags = gre_tnl_flags_to_gre_flags(p->o_flags);
        memcpy(u->name, p->name, sizeof(u->name));
 }
 
@@ -1217,10 +1217,12 @@ static void ip6gre_netlink_parms(struct nlattr *data[],
                parms->link = nla_get_u32(data[IFLA_GRE_LINK]);
 
        if (data[IFLA_GRE_IFLAGS])
-               parms->i_flags = nla_get_be16(data[IFLA_GRE_IFLAGS]);
+               parms->i_flags = gre_flags_to_tnl_flags(
+                               nla_get_be16(data[IFLA_GRE_IFLAGS]));
 
        if (data[IFLA_GRE_OFLAGS])
-               parms->o_flags = nla_get_be16(data[IFLA_GRE_OFLAGS]);
+               parms->o_flags = gre_flags_to_tnl_flags(
+                               nla_get_be16(data[IFLA_GRE_OFLAGS]));
 
        if (data[IFLA_GRE_IKEY])
                parms->i_key = nla_get_be32(data[IFLA_GRE_IKEY]);
@@ -1412,8 +1414,10 @@ static int ip6gre_fill_info(struct sk_buff *skb, const 
struct net_device *dev)
        struct __ip6_tnl_parm *p = &t->parms;
 
        if (nla_put_u32(skb, IFLA_GRE_LINK, p->link) ||
-           nla_put_be16(skb, IFLA_GRE_IFLAGS, p->i_flags) ||
-           nla_put_be16(skb, IFLA_GRE_OFLAGS, p->o_flags) ||
+           nla_put_be16(skb, IFLA_GRE_IFLAGS,
+                        gre_tnl_flags_to_gre_flags(p->i_flags)) ||
+           nla_put_be16(skb, IFLA_GRE_OFLAGS,
+                        gre_tnl_flags_to_gre_flags(p->o_flags)) ||
            nla_put_be32(skb, IFLA_GRE_IKEY, p->i_key) ||
            nla_put_be32(skb, IFLA_GRE_OKEY, p->o_key) ||
            nla_put_in6_addr(skb, IFLA_GRE_LOCAL, &p->laddr) ||
-- 
2.8.0.rc2