@@ -77,6 +77,7 @@
#include <net/pkt_sched.h>
#include <linux/rculist.h>
#include <net/flow_dissector.h>
+#include <net/xfrm.h>
#include <net/bonding.h>
#include <net/bond_3ad.h>
#include <net/bond_alb.h>
@@ -231,8 +232,6 @@ const char *bond_mode_name(int mode)
return names[mode];
}
-/*---------------------------------- VLAN -----------------------------------*/
-
/**
* bond_dev_queue_xmit - Prepare skb for xmit.
*
@@ -255,6 +254,8 @@ netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
return dev_queue_xmit(skb);
}
+/*---------------------------------- VLAN -----------------------------------*/
+
/* In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
* We don't protect the slave list iteration with a lock because:
* a. This operation is performed in IOCTL context,
@@ -325,6 +326,84 @@ static int bond_vlan_rx_kill_vid(struct net_device *bond_dev,
return 0;
}
+/*---------------------------------- XFRM -----------------------------------*/
+
+#ifdef CONFIG_XFRM_OFFLOAD
+/**
+ * bond_ipsec_add_sa - program device with a security association
+ * @xs: pointer to transformer state struct
+ **/
+static int bond_ipsec_add_sa(struct xfrm_state *xs)
+{
+ struct net_device *bond_dev = xs->xso.dev;
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave = rtnl_dereference(bond->curr_active_slave);
+
+ xs->xso.slave_dev = slave->dev;
+ bond->xs = xs;
+
+ if (!(slave->dev->xfrmdev_ops
+ && slave->dev->xfrmdev_ops->xdo_dev_state_add)) {
+ slave_warn(bond_dev, slave->dev, "Slave does not support ipsec offload\n");
+ return -EINVAL;
+ }
+
+ return slave->dev->xfrmdev_ops->xdo_dev_state_add(xs);
+}
+
+/**
+ * bond_ipsec_del_sa - clear out this specific SA
+ * @xs: pointer to transformer state struct
+ **/
+static void bond_ipsec_del_sa(struct xfrm_state *xs)
+{
+ struct net_device *bond_dev = xs->xso.dev;
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave = rtnl_dereference(bond->curr_active_slave);
+
+ if (!slave)
+ return;
+
+ xs->xso.slave_dev = slave->dev;
+
+ if (!(slave->dev->xfrmdev_ops
+ && slave->dev->xfrmdev_ops->xdo_dev_state_delete)) {
+ slave_warn(bond_dev, slave->dev, "%s: no slave xdo_dev_state_delete\n", __func__);
+ return;
+ }
+
+ slave->dev->xfrmdev_ops->xdo_dev_state_delete(xs);
+}
+
+/**
+ * bond_ipsec_offload_ok - can this packet use the xfrm hw offload
+ * @skb: current data packet
+ * @xs: pointer to transformer state struct
+ **/
+static bool bond_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs)
+{
+ struct net_device *bond_dev = xs->xso.dev;
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
+ struct net_device *slave_dev = curr_active->dev;
+
+ if (!(slave_dev->xfrmdev_ops
+ && slave_dev->xfrmdev_ops->xdo_dev_offload_ok)) {
+ slave_warn(bond_dev, slave_dev, "%s: no slave xdo_dev_offload_ok\n", __func__);
+ return false;
+ }
+
+ xs->xso.slave_dev = slave_dev;
+ return slave_dev->xfrmdev_ops->xdo_dev_offload_ok(skb, xs);
+}
+
+static const struct xfrmdev_ops bond_xfrmdev_ops = {
+ .xdo_dev_state_add = bond_ipsec_add_sa,
+ .xdo_dev_state_delete = bond_ipsec_del_sa,
+ .xdo_dev_offload_ok = bond_ipsec_offload_ok,
+};
+#endif /* CONFIG_XFRM_OFFLOAD */
+
/*------------------------------- Link status -------------------------------*/
/* Set the carrier state for the master according to the state of its
@@ -832,6 +911,11 @@ void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
return;
if (new_active) {
+#ifdef CONFIG_XFRM_OFFLOAD
+ if ((BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) && bond->xs)
+ bond_ipsec_del_sa(bond->xs);
+#endif /* CONFIG_XFRM_OFFLOAD */
+
new_active->last_link_up = jiffies;
if (new_active->link == BOND_LINK_BACK) {
@@ -894,6 +978,13 @@ void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
bond_should_notify_peers(bond);
}
+#ifdef CONFIG_XFRM_OFFLOAD
+ if (old_active && bond->xs) {
+ xfrm_dev_state_flush(dev_net(bond->dev), bond->dev, true);
+ bond_ipsec_add_sa(bond->xs);
+ }
+#endif /* CONFIG_XFRM_OFFLOAD */
+
call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev);
if (should_notify_peers) {
bond->send_peer_notif--;
@@ -1080,15 +1171,24 @@ static netdev_features_t bond_fix_features(struct net_device *dev,
#define BOND_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
+#ifdef CONFIG_XFRM_OFFLOAD
+#define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
+ NETIF_F_GSO_ESP)
+#endif /* CONFIG_XFRM_OFFLOAD */
+
#define BOND_MPLS_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
NETIF_F_ALL_TSO)
+
static void bond_compute_features(struct bonding *bond)
{
unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
IFF_XMIT_DST_RELEASE_PERM;
netdev_features_t vlan_features = BOND_VLAN_FEATURES;
netdev_features_t enc_features = BOND_ENC_FEATURES;
+#ifdef CONFIG_XFRM_OFFLOAD
+ netdev_features_t xfrm_features = BOND_XFRM_FEATURES;
+#endif /* CONFIG_XFRM_OFFLOAD */
netdev_features_t mpls_features = BOND_MPLS_FEATURES;
struct net_device *bond_dev = bond->dev;
struct list_head *iter;
@@ -1110,6 +1210,12 @@ static void bond_compute_features(struct bonding *bond)
slave->dev->hw_enc_features,
BOND_ENC_FEATURES);
+#ifdef CONFIG_XFRM_OFFLOAD
+ xfrm_features = netdev_increment_features(xfrm_features,
+ slave->dev->hw_enc_features,
+ BOND_XFRM_FEATURES);
+#endif /* CONFIG_XFRM_OFFLOAD */
+
mpls_features = netdev_increment_features(mpls_features,
slave->dev->mpls_features,
BOND_MPLS_FEATURES);
@@ -1129,6 +1235,9 @@ static void bond_compute_features(struct bonding *bond)
NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_STAG_TX |
NETIF_F_GSO_UDP_L4;
+#ifdef CONFIG_XFRM_OFFLOAD
+ bond_dev->hw_enc_features |= xfrm_features;
+#endif /* CONFIG_XFRM_OFFLOAD */
bond_dev->mpls_features = mpls_features;
bond_dev->gso_max_segs = gso_max_segs;
netif_set_gso_max_size(bond_dev, gso_max_size);
@@ -1445,6 +1554,9 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
slave_dbg(bond_dev, slave_dev, "is !NETIF_F_VLAN_CHALLENGED\n");
}
+ if (slave_dev->features & NETIF_F_HW_ESP)
+ slave_dbg(bond_dev, slave_dev, "is esp-hw-offload capable\n");
+
/* Old ifenslave binaries are no longer supported. These can
* be identified with moderate accuracy by the state of the slave:
* the current ifenslave will set the interface down prior to
@@ -4395,6 +4507,13 @@ void bond_setup(struct net_device *bond_dev)
bond_dev->priv_flags |= IFF_BONDING | IFF_UNICAST_FLT | IFF_NO_QUEUE;
bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
+#ifdef CONFIG_XFRM_OFFLOAD
+ /* set up xfrm device ops (only supported in active-backup right now) */
+ if ((BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP))
+ bond_dev->xfrmdev_ops = &bond_xfrmdev_ops;
+ bond->xs = NULL;
+#endif /* CONFIG_XFRM_OFFLOAD */
+
/* don't acquire bond device's netif_tx_lock when transmitting */
bond_dev->features |= NETIF_F_LLTX;
@@ -4413,6 +4532,10 @@ void bond_setup(struct net_device *bond_dev)
NETIF_F_HW_VLAN_CTAG_FILTER;
bond_dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
+#ifdef CONFIG_XFRM_OFFLOAD
+ if ((BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP))
+ bond_dev->hw_features |= BOND_XFRM_FEATURES;
+#endif /* CONFIG_XFRM_OFFLOAD */
bond_dev->features |= bond_dev->hw_features;
bond_dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
}
@@ -243,6 +243,9 @@ struct bonding {
#endif /* CONFIG_DEBUG_FS */
struct rtnl_link_stats64 bond_stats;
struct lock_class_key stats_lock_key;
+#ifdef CONFIG_XFRM_OFFLOAD
+ struct xfrm_state *xs;
+#endif /* CONFIG_XFRM_OFFLOAD */
};
#define bond_slave_get_rcu(dev) \