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authorXin Long <lucien.xin@gmail.com>2019-11-10 12:26:21 +0800
committerDavid S. Miller <davem@davemloft.net>2019-11-11 14:43:02 -0800
commit0c06d166eacdb3176fbce589d44ffe810a95ab97 (patch)
treeda5773f701df489f457fc2efa542ed870dc4ef0a /net/ipv4
parent58e8494eb033eb9134989dbc52e2a236e3f8a462 (diff)
lwtunnel: ignore any TUNNEL_OPTIONS_PRESENT flags set by users
TUNNEL_OPTIONS_PRESENT (TUNNEL_GENEVE_OPT|TUNNEL_VXLAN_OPT| TUNNEL_ERSPAN_OPT) flags should be set only according to tb[LWTUNNEL_IP_OPTS], which is done in ip_tun_parse_opts(). When setting info key.tun_flags, the TUNNEL_OPTIONS_PRESENT bits in tb[LWTUNNEL_IP(6)_FLAGS] passed from users should be ignored. While at it, replace all (TUNNEL_GENEVE_OPT|TUNNEL_VXLAN_OPT| TUNNEL_ERSPAN_OPT) with 'TUNNEL_OPTIONS_PRESENT'. Fixes: 3093fbe7ff4b ("route: Per route IP tunnel metadata via lightweight tunnel") Fixes: 32a2b002ce61 ("ipv6: route: per route IP tunnel metadata via lightweight tunnel") Signed-off-by: Xin Long <lucien.xin@gmail.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/ip_tunnel_core.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index e444cd12e864..c724fb30d048 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -451,7 +451,9 @@ static int ip_tun_build_state(struct nlattr *attr,
tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP_TOS]);
if (tb[LWTUNNEL_IP_FLAGS])
- tun_info->key.tun_flags |= nla_get_be16(tb[LWTUNNEL_IP_FLAGS]);
+ tun_info->key.tun_flags |=
+ (nla_get_be16(tb[LWTUNNEL_IP_FLAGS]) &
+ ~TUNNEL_OPTIONS_PRESENT);
tun_info->mode = IP_TUNNEL_INFO_TX;
tun_info->options_len = opt_len;
@@ -550,8 +552,7 @@ static int ip_tun_fill_encap_opts(struct sk_buff *skb, int type,
struct nlattr *nest;
int err = 0;
- if (!(tun_info->key.tun_flags &
- (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT | TUNNEL_ERSPAN_OPT)))
+ if (!(tun_info->key.tun_flags & TUNNEL_OPTIONS_PRESENT))
return 0;
nest = nla_nest_start_noflag(skb, type);
@@ -596,8 +597,7 @@ static int ip_tun_opts_nlsize(struct ip_tunnel_info *info)
{
int opt_len;
- if (!(info->key.tun_flags &
- (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT | TUNNEL_ERSPAN_OPT)))
+ if (!(info->key.tun_flags & TUNNEL_OPTIONS_PRESENT))
return 0;
opt_len = nla_total_size(0); /* LWTUNNEL_IP_OPTS */
@@ -718,7 +718,9 @@ static int ip6_tun_build_state(struct nlattr *attr,
tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP6_TC]);
if (tb[LWTUNNEL_IP6_FLAGS])
- tun_info->key.tun_flags |= nla_get_be16(tb[LWTUNNEL_IP6_FLAGS]);
+ tun_info->key.tun_flags |=
+ (nla_get_be16(tb[LWTUNNEL_IP6_FLAGS]) &
+ ~TUNNEL_OPTIONS_PRESENT);
tun_info->mode = IP_TUNNEL_INFO_TX | IP_TUNNEL_INFO_IPV6;
tun_info->options_len = opt_len;