Phil pointed out that there is a mismatch between vxlan and geneve ttl inherit. We should define it as a flag and use nla_put_flag to export this opiton.
Fixes: 52d0d404d39dd ("geneve: add ttl inherit support") Reported-by: Phil Sutter <p...@nwl.cc> Signed-off-by: Hangbin Liu <liuhang...@gmail.com> --- drivers/net/geneve.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index 6625fab..09ab2fd 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -1100,7 +1100,7 @@ static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, [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_TTL_INHERIT] = { .type = NLA_FLAG }, }; static int geneve_validate(struct nlattr *tb[], struct nlattr *data[], @@ -1582,7 +1582,7 @@ static size_t geneve_get_size(const struct net_device *dev) nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ - nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL_INHERIT */ + nla_total_size(0) + /* IFLA_GENEVE_TTL_INHERIT */ 0; } @@ -1636,7 +1636,7 @@ static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) goto nla_put_failure; #endif - if (nla_put_u8(skb, IFLA_GENEVE_TTL_INHERIT, ttl_inherit)) + if (ttl_inherit && nla_put_flag(skb, IFLA_GENEVE_TTL_INHERIT)) goto nla_put_failure; return 0; -- 2.5.5