Introduce the function pskb_inet_may_pull_reason() and make
pskb_inet_may_pull a simple inline call to it. The drop reasons of it just
come from pskb_may_pull_reason().

Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
---
 include/net/ip_tunnels.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index 6194fbb564c6..7fc2f7bf837a 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -439,7 +439,8 @@ int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op,
 int ip_tunnel_encap_setup(struct ip_tunnel *t,
 			  struct ip_tunnel_encap *ipencap);
 
-static inline bool pskb_inet_may_pull(struct sk_buff *skb)
+static inline enum skb_drop_reason
+pskb_inet_may_pull_reason(struct sk_buff *skb)
 {
 	int nhlen;
 
@@ -456,7 +457,12 @@ static inline bool pskb_inet_may_pull(struct sk_buff *skb)
 		nhlen = 0;
 	}
 
-	return pskb_network_may_pull(skb, nhlen);
+	return pskb_network_may_pull_reason(skb, nhlen);
+}
+
+static inline bool pskb_inet_may_pull(struct sk_buff *skb)
+{
+	return pskb_inet_may_pull_reason(skb) == SKB_NOT_DROPPED_YET;
 }
 
 /* Variant of pskb_inet_may_pull().
-- 
2.39.2