----- On Feb 2, 2017, at 3:10 PM, pablo pa...@netfilter.org wrote:
> 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 <aschu...@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
