On Mon, Jan 30, 2017 at 05:37:08PM +0100, Andreas
Schultz wrote:
Having both GTPv0-U and GTPv1-U is not always
desirable.
Fallback from GTPv1-U to GTPv0-U was depreciated from 3GPP
Rel-8 onwards. Post Rel-8 implementation are discuraged
from listening on the v0 port (see 3GPP TS 29.281, Sect. 1).
A future change will completely decouple the sockets from the
network device. Till then, at least one of the sockets needs to
be specified (either v0 or v1), the other is optional.
Signed-off-by: Andreas Schultz <aschultz(a)tpip.net>
---
drivers/net/gtp.c | 142 +++++++++++++++++++++++++++++-------------------------
1 file changed, 76 insertions(+), 66 deletions(-)
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index bda0c64..18944f4 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -259,28 +259,30 @@ static int gtp1u_udp_encap_recv(struct gtp_dev *gtp,
struct sk_buff *skb,
return iptunnel_pull_header(skb, hdrlen, skb->protocol, xnet);
}
-static void gtp_encap_disable(struct gtp_dev *gtp)
-{
- if (gtp->sock0 && gtp->sock0->sk) {
- udp_sk(gtp->sock0->sk)->encap_type = 0;
- rcu_assign_sk_user_data(gtp->sock0->sk, NULL);
- }
- if (gtp->sock1u && gtp->sock1u->sk) {
- udp_sk(gtp->sock1u->sk)->encap_type = 0;
- rcu_assign_sk_user_data(gtp->sock1u->sk, NULL);
- }
-
- gtp->sock0 = NULL;
- gtp->sock1u = NULL;
-}
-
static void gtp_encap_destroy(struct sock *sk)
{
struct gtp_dev *gtp;
gtp = rcu_dereference_sk_user_data(sk);
- if (gtp)
- gtp_encap_disable(gtp);
+ if (gtp) {
+ udp_sk(sk)->encap_type = 0;
+ rcu_assign_sk_user_data(sk, NULL);
+ }
+}
+
+static void gtp_encap_disable_sock(struct socket *sock)
Nitpick: Please, use sk for consistency:
static void gtp_encap_disable_sock(struct socket *sk)
Throughout the net subsystem 'struct socket` is always using sock
for variable names and 'struct sock' is using sk. I have been
following that convention, but can change to sk if you really want.
Andreas