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authorDaniel Borkmann <daniel@iogearbox.net>2016-03-04 15:15:05 +0100
committerDavid S. Miller <davem@davemloft.net>2016-03-08 13:58:46 -0500
commit2208087061c4ad88de188911367effc550144836 (patch)
tree63dd3362d2160253ea7ce9f96c5cdb2bdff51551 /net/core
parent577c50aade0f34926e4a47f61629739e6da91af6 (diff)
bpf: allow to propagate df in bpf_skb_set_tunnel_key
Added by 9a628224a61b ("ip_tunnel: Add dont fragment flag."), allow to feed df flag into tunneling facilities (currently supported on TX by vxlan, geneve and gre) as a hint from eBPF's bpf_skb_set_tunnel_key() helper. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/filter.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/core/filter.c b/net/core/filter.c
index ce4e18dd2c89..6c9d15561d04 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -1819,7 +1819,8 @@ static u64 bpf_skb_set_tunnel_key(u64 r1, u64 r2, u64 size, u64 flags, u64 r5)
u8 compat[sizeof(struct bpf_tunnel_key)];
struct ip_tunnel_info *info;
- if (unlikely(flags & ~(BPF_F_TUNINFO_IPV6 | BPF_F_ZERO_CSUM_TX)))
+ if (unlikely(flags & ~(BPF_F_TUNINFO_IPV6 | BPF_F_ZERO_CSUM_TX |
+ BPF_F_DONT_FRAGMENT)))
return -EINVAL;
if (unlikely(size != sizeof(struct bpf_tunnel_key))) {
switch (size) {
@@ -1844,6 +1845,9 @@ static u64 bpf_skb_set_tunnel_key(u64 r1, u64 r2, u64 size, u64 flags, u64 r5)
info->mode = IP_TUNNEL_INFO_TX;
info->key.tun_flags = TUNNEL_KEY | TUNNEL_CSUM;
+ if (flags & BPF_F_DONT_FRAGMENT)
+ info->key.tun_flags |= TUNNEL_DONT_FRAGMENT;
+
info->key.tun_id = cpu_to_be64(from->tunnel_id);
info->key.tos = from->tunnel_tos;
info->key.ttl = from->tunnel_ttl;