@@ -301,6 +301,19 @@ netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
return dev_queue_xmit(skb);
}
+static bool bond_sk_check(struct bonding *bond)
+{
+ switch (BOND_MODE(bond)) {
+ case BOND_MODE_8023AD:
+ case BOND_MODE_XOR:
+ if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34)
+ return true;
+ fallthrough;
+ default:
+ return false;
+ }
+}
+
/*---------------------------------- VLAN -----------------------------------*/
/* In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
@@ -4553,6 +4566,82 @@ static struct net_device *bond_xmit_get_slave(struct net_device *master_dev,
return NULL;
}
+static void bond_sk_to_flow(struct sock *sk, struct flow_keys *flow)
+{
+ switch (sk->sk_family) {
+#if IS_ENABLED(CONFIG_IPV6)
+ case AF_INET6:
+ if (sk->sk_ipv6only ||
+ ipv6_addr_type(&sk->sk_v6_daddr) != IPV6_ADDR_MAPPED) {
+ flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
+ flow->addrs.v6addrs.src = inet6_sk(sk)->saddr;
+ flow->addrs.v6addrs.dst = sk->sk_v6_daddr;
+ break;
+ }
+ fallthrough;
+#endif
+ default: /* AF_INET */
+ flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
+ flow->addrs.v4addrs.src = inet_sk(sk)->inet_rcv_saddr;
+ flow->addrs.v4addrs.dst = inet_sk(sk)->inet_daddr;
+ break;
+ }
+
+ flow->ports.src = inet_sk(sk)->inet_sport;
+ flow->ports.dst = inet_sk(sk)->inet_dport;
+}
+
+/**
+ * bond_sk_hash_l34 - generate a hash value based on the socket's L3 and L4 fields
+ * @sk: socket to use for headers
+ *
+ * This function will extract the necessary field from the socket and use
+ * them to generate a hash based on the LAYER34 xmit_policy.
+ * Assumes that sk is a TCP or UDP socket.
+ */
+static u32 bond_sk_hash_l34(struct sock *sk)
+{
+ struct flow_keys flow;
+ u32 hash;
+
+ bond_sk_to_flow(sk, &flow);
+
+ /* L4 */
+ memcpy(&hash, &flow.ports.ports, sizeof(hash));
+ /* L3 */
+ return bond_ip_hash(hash, &flow);
+}
+
+static struct net_device *__bond_sk_get_slave_dev(struct bonding *bond,
+ struct sock *sk)
+{
+ struct bond_up_slave *slaves;
+ struct slave *slave;
+ unsigned int count;
+ u32 hash;
+
+ slaves = rcu_dereference(bond->usable_slaves);
+ count = slaves ? READ_ONCE(slaves->count) : 0;
+ if (unlikely(!count))
+ return NULL;
+
+ hash = bond_sk_hash_l34(sk);
+ slave = slaves->arr[hash % count];
+
+ return slave->dev;
+}
+
+static struct net_device *bond_sk_get_slave(struct net_device *master_dev,
+ struct sock *sk)
+{
+ struct bonding *bond = netdev_priv(master_dev);
+
+ if (bond_sk_check(bond))
+ return __bond_sk_get_slave_dev(bond, sk);
+
+ return NULL;
+}
+
static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct bonding *bond = netdev_priv(dev);
@@ -4689,6 +4778,7 @@ static const struct net_device_ops bond_netdev_ops = {
.ndo_fix_features = bond_fix_features,
.ndo_features_check = passthru_features_check,
.ndo_get_xmit_slave = bond_xmit_get_slave,
+ .ndo_sk_get_slave = bond_sk_get_slave,
};
static const struct device_type bond_type = {
Support L3/4 sockets only, with xmit_hash_policy==LAYER34 and modes xor/802.3ad. Signed-off-by: Tariq Toukan <tariqt@nvidia.com> --- drivers/net/bonding/bond_main.c | 90 +++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+)