summaryrefslogtreecommitdiffstats
path: root/drivers/net/vxlan.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/vxlan.c')
-rw-r--r--drivers/net/vxlan.c86
1 files changed, 39 insertions, 47 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index bf64b4191dc..78df8f39e57 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -60,10 +60,6 @@
#define VXLAN_N_VID (1u << 24)
#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
-/* IP header + UDP + VXLAN + Ethernet header */
-#define VXLAN_HEADROOM (20 + 8 + 8 + 14)
-/* IPv6 header + UDP + VXLAN + Ethernet header */
-#define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
#define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */
@@ -564,7 +560,7 @@ static void vxlan_notify_add_rx_port(struct sock *sk)
struct net_device *dev;
struct net *net = sock_net(sk);
sa_family_t sa_family = sk->sk_family;
- u16 port = htons(inet_sk(sk)->inet_sport);
+ __be16 port = inet_sk(sk)->inet_sport;
rcu_read_lock();
for_each_netdev_rcu(net, dev) {
@@ -581,7 +577,7 @@ static void vxlan_notify_del_rx_port(struct sock *sk)
struct net_device *dev;
struct net *net = sock_net(sk);
sa_family_t sa_family = sk->sk_family;
- u16 port = htons(inet_sk(sk)->inet_sport);
+ __be16 port = inet_sk(sk)->inet_sport;
rcu_read_lock();
for_each_netdev_rcu(net, dev) {
@@ -952,8 +948,7 @@ void vxlan_sock_release(struct vxlan_sock *vs)
spin_lock(&vn->sock_lock);
hlist_del_rcu(&vs->hlist);
- smp_wmb();
- vs->sock->sk->sk_user_data = NULL;
+ rcu_assign_sk_user_data(vs->sock->sk, NULL);
vxlan_notify_del_rx_port(sk);
spin_unlock(&vn->sock_lock);
@@ -1048,8 +1043,7 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
port = inet_sk(sk)->inet_sport;
- smp_read_barrier_depends();
- vs = (struct vxlan_sock *)sk->sk_user_data;
+ vs = rcu_dereference_sk_user_data(sk);
if (!vs)
goto drop;
@@ -2021,7 +2015,8 @@ static struct device_type vxlan_type = {
};
/* Calls the ndo_add_vxlan_port of the caller in order to
- * supply the listening VXLAN udp ports.
+ * supply the listening VXLAN udp ports. Callers are expected
+ * to implement the ndo_add_vxlan_port.
*/
void vxlan_get_rx_port(struct net_device *dev)
{
@@ -2029,16 +2024,13 @@ void vxlan_get_rx_port(struct net_device *dev)
struct net *net = dev_net(dev);
struct vxlan_net *vn = net_generic(net, vxlan_net_id);
sa_family_t sa_family;
- u16 port;
- int i;
-
- if (!dev || !dev->netdev_ops || !dev->netdev_ops->ndo_add_vxlan_port)
- return;
+ __be16 port;
+ unsigned int i;
spin_lock(&vn->sock_lock);
for (i = 0; i < PORT_HASH_SIZE; ++i) {
- hlist_for_each_entry_rcu(vs, vs_head(net, i), hlist) {
- port = htons(inet_sk(vs->sock->sk)->inet_sport);
+ hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) {
+ port = inet_sk(vs->sock->sk)->inet_sport;
sa_family = vs->sock->sk->sk_family;
dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
port);
@@ -2091,7 +2083,7 @@ static void vxlan_setup(struct net_device *dev)
vxlan->age_timer.function = vxlan_cleanup;
vxlan->age_timer.data = (unsigned long) vxlan;
- inet_get_local_port_range(&low, &high);
+ inet_get_local_port_range(dev_net(dev), &low, &high);
vxlan->port_min = low;
vxlan->port_max = high;
vxlan->dst_port = htons(vxlan_port);
@@ -2184,7 +2176,7 @@ static void vxlan_del_work(struct work_struct *work)
* could be used for both IPv4 and IPv6 communications, but
* users may set bindv6only=1.
*/
-static int create_v6_sock(struct net *net, __be16 port, struct socket **psock)
+static struct socket *create_v6_sock(struct net *net, __be16 port)
{
struct sock *sk;
struct socket *sock;
@@ -2197,7 +2189,7 @@ static int create_v6_sock(struct net *net, __be16 port, struct socket **psock)
rc = sock_create_kern(AF_INET6, SOCK_DGRAM, IPPROTO_UDP, &sock);
if (rc < 0) {
pr_debug("UDPv6 socket create failed\n");
- return rc;
+ return ERR_PTR(rc);
}
/* Put in proper namespace */
@@ -2212,28 +2204,27 @@ static int create_v6_sock(struct net *net, __be16 port, struct socket **psock)
pr_debug("bind for UDPv6 socket %pI6:%u (%d)\n",
&vxlan_addr.sin6_addr, ntohs(vxlan_addr.sin6_port), rc);
sk_release_kernel(sk);
- return rc;
+ return ERR_PTR(rc);
}
/* At this point, IPv6 module should have been loaded in
* sock_create_kern().
*/
BUG_ON(!ipv6_stub);
- *psock = sock;
/* Disable multicast loopback */
inet_sk(sk)->mc_loop = 0;
- return 0;
+ return sock;
}
#else
-static int create_v6_sock(struct net *net, __be16 port, struct socket **psock)
+static struct socket *create_v6_sock(struct net *net, __be16 port)
{
- return -EPFNOSUPPORT;
+ return ERR_PTR(-EPFNOSUPPORT);
}
#endif
-static int create_v4_sock(struct net *net, __be16 port, struct socket **psock)
+static struct socket *create_v4_sock(struct net *net, __be16 port)
{
struct sock *sk;
struct socket *sock;
@@ -2248,7 +2239,7 @@ static int create_v4_sock(struct net *net, __be16 port, struct socket **psock)
rc = sock_create_kern(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock);
if (rc < 0) {
pr_debug("UDP socket create failed\n");
- return rc;
+ return ERR_PTR(rc);
}
/* Put in proper namespace */
@@ -2261,13 +2252,12 @@ static int create_v4_sock(struct net *net, __be16 port, struct socket **psock)
pr_debug("bind for UDP socket %pI4:%u (%d)\n",
&vxlan_addr.sin_addr, ntohs(vxlan_addr.sin_port), rc);
sk_release_kernel(sk);
- return rc;
+ return ERR_PTR(rc);
}
- *psock = sock;
/* Disable multicast loopback */
inet_sk(sk)->mc_loop = 0;
- return 0;
+ return sock;
}
/* Create new listen socket if needed */
@@ -2278,7 +2268,6 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
struct vxlan_sock *vs;
struct socket *sock;
struct sock *sk;
- int rc = 0;
unsigned int h;
vs = kmalloc(sizeof(*vs), GFP_KERNEL);
@@ -2291,12 +2280,12 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
INIT_WORK(&vs->del_work, vxlan_del_work);
if (ipv6)
- rc = create_v6_sock(net, port, &sock);
+ sock = create_v6_sock(net, port);
else
- rc = create_v4_sock(net, port, &sock);
- if (rc < 0) {
+ sock = create_v4_sock(net, port);
+ if (IS_ERR(sock)) {
kfree(vs);
- return ERR_PTR(rc);
+ return ERR_CAST(sock);
}
vs->sock = sock;
@@ -2304,8 +2293,7 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
atomic_set(&vs->refcnt, 1);
vs->rcv = rcv;
vs->data = data;
- smp_wmb();
- vs->sock->sk->sk_user_data = vs;
+ rcu_assign_sk_user_data(vs->sock->sk, vs);
spin_lock(&vn->sock_lock);
hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
@@ -2492,15 +2480,19 @@ static int vxlan_newlink(struct net *net, struct net_device *dev,
SET_ETHTOOL_OPS(dev, &vxlan_ethtool_ops);
- /* create an fdb entry for default destination */
- err = vxlan_fdb_create(vxlan, all_zeros_mac,
- &vxlan->default_dst.remote_ip,
- NUD_REACHABLE|NUD_PERMANENT,
- NLM_F_EXCL|NLM_F_CREATE,
- vxlan->dst_port, vxlan->default_dst.remote_vni,
- vxlan->default_dst.remote_ifindex, NTF_SELF);
- if (err)
- return err;
+ /* create an fdb entry for a valid default destination */
+ if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
+ err = vxlan_fdb_create(vxlan, all_zeros_mac,
+ &vxlan->default_dst.remote_ip,
+ NUD_REACHABLE|NUD_PERMANENT,
+ NLM_F_EXCL|NLM_F_CREATE,
+ vxlan->dst_port,
+ vxlan->default_dst.remote_vni,
+ vxlan->default_dst.remote_ifindex,
+ NTF_SELF);
+ if (err)
+ return err;
+ }
err = register_netdevice(dev);
if (err) {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-01-16 19:36:35 +0000