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authorGuillaume Nault <g.nault@alphalink.fr>2018-08-10 14:21:55 +0300
committerDavid S. Miller <davem@davemloft.net>2018-08-11 22:13:49 +0300
commitd6a61ec936676dbe25a6eb76e1229787dc2fbba8 (patch)
tree6365ef6a97498aee99a5131bef45375d72d3d65a /net/l2tp/l2tp_core.h
parent8a8982d1e2137aa020dd9fbc96b5e3c4fd871d0c (diff)
downloadlinux-d6a61ec936676dbe25a6eb76e1229787dc2fbba8.tar.xz
l2tp: define l2tp_tunnel_uses_xfrm()
Use helper function to figure out if a tunnel is using ipsec. Also, avoid accessing ->sk_policy directly since it's RCU protected. Signed-off-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l2tp/l2tp_core.h')
-rw-r--r--net/l2tp/l2tp_core.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h
index 5804065dfbfb..04a9488c54b4 100644
--- a/net/l2tp/l2tp_core.h
+++ b/net/l2tp/l2tp_core.h
@@ -15,6 +15,10 @@
#include <net/dst.h>
#include <net/sock.h>
+#ifdef CONFIG_XFRM
+#include <net/xfrm.h>
+#endif
+
/* Just some random numbers */
#define L2TP_TUNNEL_MAGIC 0x42114DDA
#define L2TP_SESSION_MAGIC 0x0C04EB7D
@@ -284,6 +288,21 @@ static inline u32 l2tp_tunnel_dst_mtu(const struct l2tp_tunnel *tunnel)
return mtu;
}
+#ifdef CONFIG_XFRM
+static inline bool l2tp_tunnel_uses_xfrm(const struct l2tp_tunnel *tunnel)
+{
+ struct sock *sk = tunnel->sock;
+
+ return sk && (rcu_access_pointer(sk->sk_policy[0]) ||
+ rcu_access_pointer(sk->sk_policy[1]));
+}
+#else
+static inline bool l2tp_tunnel_uses_xfrm(const struct l2tp_tunnel *tunnel)
+{
+ return false;
+}
+#endif
+
#define l2tp_printk(ptr, type, func, fmt, ...) \
do { \
if (((ptr)->debug) & (type)) \