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-rw-r--r--include/net/gre.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/gre.h b/include/net/gre.h
index f90585decbce..797142eee9cd 100644
--- a/include/net/gre.h
+++ b/include/net/gre.h
@@ -37,6 +37,9 @@ struct net_device *gretap_fb_dev_create(struct net *net, const char *name,
int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi,
bool *csum_err, __be16 proto, int nhs);
+bool is_gretap_dev(const struct net_device *dev);
+bool is_ip6gretap_dev(const struct net_device *dev);
+
static inline int gre_calc_hlen(__be16 o_flags)
{
int addend = 4;