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-rw-r--r--drivers/net/gtp.c101
-rw-r--r--include/uapi/linux/if_link.h1
2 files changed, 85 insertions, 17 deletions
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index bf087171bcf0..25d8521897b3 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -66,8 +66,10 @@ struct gtp_dev {
struct sock *sk0;
struct sock *sk1u;
+ u8 sk_created;
struct net_device *dev;
+ struct net *net;
unsigned int role;
unsigned int hash_size;
@@ -320,8 +322,16 @@ static void gtp_encap_disable_sock(struct sock *sk)
static void gtp_encap_disable(struct gtp_dev *gtp)
{
- gtp_encap_disable_sock(gtp->sk0);
- gtp_encap_disable_sock(gtp->sk1u);
+ if (gtp->sk_created) {
+ udp_tunnel_sock_release(gtp->sk0->sk_socket);
+ udp_tunnel_sock_release(gtp->sk1u->sk_socket);
+ gtp->sk_created = false;
+ gtp->sk0 = NULL;
+ gtp->sk1u = NULL;
+ } else {
+ gtp_encap_disable_sock(gtp->sk0);
+ gtp_encap_disable_sock(gtp->sk1u);
+ }
}
/* UDP encapsulation receive handler. See net/ipv4/udp.c.
@@ -656,17 +666,69 @@ static void gtp_destructor(struct net_device *dev)
kfree(gtp->tid_hash);
}
+static struct sock *gtp_create_sock(int type, struct gtp_dev *gtp)
+{
+ struct udp_tunnel_sock_cfg tuncfg = {};
+ struct udp_port_cfg udp_conf = {
+ .local_ip.s_addr = htonl(INADDR_ANY),
+ .family = AF_INET,
+ };
+ struct net *net = gtp->net;
+ struct socket *sock;
+ int err;
+
+ if (type == UDP_ENCAP_GTP0)
+ udp_conf.local_udp_port = htons(GTP0_PORT);
+ else if (type == UDP_ENCAP_GTP1U)
+ udp_conf.local_udp_port = htons(GTP1U_PORT);
+ else
+ return ERR_PTR(-EINVAL);
+
+ err = udp_sock_create(net, &udp_conf, &sock);
+ if (err)
+ return ERR_PTR(err);
+
+ tuncfg.sk_user_data = gtp;
+ tuncfg.encap_type = type;
+ tuncfg.encap_rcv = gtp_encap_recv;
+ tuncfg.encap_destroy = NULL;
+
+ setup_udp_tunnel_sock(net, sock, &tuncfg);
+
+ return sock->sk;
+}
+
+static int gtp_create_sockets(struct gtp_dev *gtp, struct nlattr *data[])
+{
+ struct sock *sk1u = NULL;
+ struct sock *sk0 = NULL;
+
+ sk0 = gtp_create_sock(UDP_ENCAP_GTP0, gtp);
+ if (IS_ERR(sk0))
+ return PTR_ERR(sk0);
+
+ sk1u = gtp_create_sock(UDP_ENCAP_GTP1U, gtp);
+ if (IS_ERR(sk1u)) {
+ udp_tunnel_sock_release(sk0->sk_socket);
+ return PTR_ERR(sk1u);
+ }
+
+ gtp->sk_created = true;
+ gtp->sk0 = sk0;
+ gtp->sk1u = sk1u;
+
+ return 0;
+}
+
static int gtp_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
+ unsigned int role = GTP_ROLE_GGSN;
struct gtp_dev *gtp;
struct gtp_net *gn;
int hashsize, err;
- if (!data[IFLA_GTP_FD0] && !data[IFLA_GTP_FD1])
- return -EINVAL;
-
gtp = netdev_priv(dev);
if (!data[IFLA_GTP_PDP_HASHSIZE]) {
@@ -677,11 +739,23 @@ static int gtp_newlink(struct net *src_net, struct net_device *dev,
hashsize = 1024;
}
+ if (data[IFLA_GTP_ROLE]) {
+ role = nla_get_u32(data[IFLA_GTP_ROLE]);
+ if (role > GTP_ROLE_SGSN)
+ return -EINVAL;
+ }
+ gtp->role = role;
+
+ gtp->net = src_net;
+
err = gtp_hashtable_new(gtp, hashsize);
if (err < 0)
return err;
- err = gtp_encap_enable(gtp, data);
+ if (data[IFLA_GTP_CREATE_SOCKETS])
+ err = gtp_create_sockets(gtp, data);
+ else
+ err = gtp_encap_enable(gtp, data);
if (err < 0)
goto out_hashtable;
@@ -726,6 +800,7 @@ static const struct nla_policy gtp_policy[IFLA_GTP_MAX + 1] = {
[IFLA_GTP_FD1] = { .type = NLA_U32 },
[IFLA_GTP_PDP_HASHSIZE] = { .type = NLA_U32 },
[IFLA_GTP_ROLE] = { .type = NLA_U32 },
+ [IFLA_GTP_CREATE_SOCKETS] = { .type = NLA_U8 },
};
static int gtp_validate(struct nlattr *tb[], struct nlattr *data[],
@@ -848,7 +923,9 @@ static int gtp_encap_enable(struct gtp_dev *gtp, struct nlattr *data[])
{
struct sock *sk1u = NULL;
struct sock *sk0 = NULL;
- unsigned int role = GTP_ROLE_GGSN;
+
+ if (!data[IFLA_GTP_FD0] && !data[IFLA_GTP_FD1])
+ return -EINVAL;
if (data[IFLA_GTP_FD0]) {
u32 fd0 = nla_get_u32(data[IFLA_GTP_FD0]);
@@ -868,18 +945,8 @@ static int gtp_encap_enable(struct gtp_dev *gtp, struct nlattr *data[])
}
}
- if (data[IFLA_GTP_ROLE]) {
- role = nla_get_u32(data[IFLA_GTP_ROLE]);
- if (role > GTP_ROLE_SGSN) {
- gtp_encap_disable_sock(sk0);
- gtp_encap_disable_sock(sk1u);
- return -EINVAL;
- }
- }
-
gtp->sk0 = sk0;
gtp->sk1u = sk1u;
- gtp->role = role;
return 0;
}
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index ddca20357e7e..ebd2aa3ef809 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -887,6 +887,7 @@ enum {
IFLA_GTP_FD1,
IFLA_GTP_PDP_HASHSIZE,
IFLA_GTP_ROLE,
+ IFLA_GTP_CREATE_SOCKETS,
__IFLA_GTP_MAX,
};
#define IFLA_GTP_MAX (__IFLA_GTP_MAX - 1)