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Diffstat (limited to 'net/batman-adv/soft-interface.c')
-rw-r--r--net/batman-adv/soft-interface.c106
1 files changed, 91 insertions, 15 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index b9a28d2..6b548fd 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -20,6 +20,7 @@
#include "main.h"
#include "soft-interface.h"
#include "hard-interface.h"
+#include "distributed-arp-table.h"
#include "routing.h"
#include "send.h"
#include "debugfs.h"
@@ -33,6 +34,7 @@
#include <linux/ethtool.h>
#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
+#include <linux/if_ether.h>
#include "unicast.h"
#include "bridge_loop_avoidance.h"
@@ -145,14 +147,17 @@ static int batadv_interface_tx(struct sk_buff *skb,
struct batadv_hard_iface *primary_if = NULL;
struct batadv_bcast_packet *bcast_packet;
struct vlan_ethhdr *vhdr;
- __be16 ethertype = __constant_htons(BATADV_ETH_P_BATMAN);
- static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, 0x00,
- 0x00};
+ __be16 ethertype = __constant_htons(ETH_P_BATMAN);
+ static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
+ 0x00, 0x00};
+ static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
+ 0x00, 0x00};
unsigned int header_len = 0;
int data_len = skb->len, ret;
short vid __maybe_unused = -1;
bool do_bcast = false;
uint32_t seqno;
+ unsigned long brd_delay = 1;
if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
goto dropped;
@@ -168,7 +173,7 @@ static int batadv_interface_tx(struct sk_buff *skb,
break;
/* fall through */
- case BATADV_ETH_P_BATMAN:
+ case ETH_P_BATMAN:
goto dropped;
}
@@ -180,10 +185,16 @@ static int batadv_interface_tx(struct sk_buff *skb,
/* don't accept stp packets. STP does not help in meshes.
* better use the bridge loop avoidance ...
+ *
+ * The same goes for ECTP sent at least by some Cisco Switches,
+ * it might confuse the mesh when used with bridge loop avoidance.
*/
if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
goto dropped;
+ if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
+ goto dropped;
+
if (is_multicast_ether_addr(ethhdr->h_dest)) {
do_bcast = true;
@@ -216,6 +227,13 @@ static int batadv_interface_tx(struct sk_buff *skb,
if (!primary_if)
goto dropped;
+ /* in case of ARP request, we do not immediately broadcasti the
+ * packet, instead we first wait for DAT to try to retrieve the
+ * correct ARP entry
+ */
+ if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
+ brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
+
if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
goto dropped;
@@ -237,7 +255,7 @@ static int batadv_interface_tx(struct sk_buff *skb,
seqno = atomic_inc_return(&bat_priv->bcast_seqno);
bcast_packet->seqno = htonl(seqno);
- batadv_add_bcast_packet_to_list(bat_priv, skb, 1);
+ batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay);
/* a copy is stored in the bcast list, therefore removing
* the original skb.
@@ -252,7 +270,12 @@ static int batadv_interface_tx(struct sk_buff *skb,
goto dropped;
}
- ret = batadv_unicast_send_skb(skb, bat_priv);
+ if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
+ goto dropped;
+
+ batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
+
+ ret = batadv_unicast_send_skb(bat_priv, skb);
if (ret != 0)
goto dropped_freed;
}
@@ -280,7 +303,7 @@ void batadv_interface_rx(struct net_device *soft_iface,
struct vlan_ethhdr *vhdr;
struct batadv_header *batadv_header = (struct batadv_header *)skb->data;
short vid __maybe_unused = -1;
- __be16 ethertype = __constant_htons(BATADV_ETH_P_BATMAN);
+ __be16 ethertype = __constant_htons(ETH_P_BATMAN);
bool is_bcast;
is_bcast = (batadv_header->packet_type == BATADV_BCAST);
@@ -303,7 +326,7 @@ void batadv_interface_rx(struct net_device *soft_iface,
break;
/* fall through */
- case BATADV_ETH_P_BATMAN:
+ case ETH_P_BATMAN:
goto dropped;
}
@@ -325,6 +348,12 @@ void batadv_interface_rx(struct net_device *soft_iface,
soft_iface->last_rx = jiffies;
+ /* Let the bridge loop avoidance check the packet. If will
+ * not handle it, we can safely push it up.
+ */
+ if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
+ goto out;
+
if (orig_node)
batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
ethhdr->h_source);
@@ -332,12 +361,6 @@ void batadv_interface_rx(struct net_device *soft_iface,
if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest))
goto dropped;
- /* Let the bridge loop avoidance check the packet. If will
- * not handle it, we can safely push it up.
- */
- if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
- goto out;
-
netif_rx(skb);
goto out;
@@ -347,7 +370,51 @@ out:
return;
}
+/* batman-adv network devices have devices nesting below it and are a special
+ * "super class" of normal network devices; split their locks off into a
+ * separate class since they always nest.
+ */
+static struct lock_class_key batadv_netdev_xmit_lock_key;
+static struct lock_class_key batadv_netdev_addr_lock_key;
+
+/**
+ * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
+ * @dev: device which owns the tx queue
+ * @txq: tx queue to modify
+ * @_unused: always NULL
+ */
+static void batadv_set_lockdep_class_one(struct net_device *dev,
+ struct netdev_queue *txq,
+ void *_unused)
+{
+ lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
+}
+
+/**
+ * batadv_set_lockdep_class - Set txq and addr_list lockdep class
+ * @dev: network device to modify
+ */
+static void batadv_set_lockdep_class(struct net_device *dev)
+{
+ lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
+ netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
+}
+
+/**
+ * batadv_softif_init - Late stage initialization of soft interface
+ * @dev: registered network device to modify
+ *
+ * Returns error code on failures
+ */
+static int batadv_softif_init(struct net_device *dev)
+{
+ batadv_set_lockdep_class(dev);
+
+ return 0;
+}
+
static const struct net_device_ops batadv_netdev_ops = {
+ .ndo_init = batadv_softif_init,
.ndo_open = batadv_interface_open,
.ndo_stop = batadv_interface_release,
.ndo_get_stats = batadv_interface_stats,
@@ -414,6 +481,9 @@ struct net_device *batadv_softif_create(const char *name)
atomic_set(&bat_priv->aggregated_ogms, 1);
atomic_set(&bat_priv->bonding, 0);
atomic_set(&bat_priv->bridge_loop_avoidance, 0);
+#ifdef CONFIG_BATMAN_ADV_DAT
+ atomic_set(&bat_priv->distributed_arp_table, 1);
+#endif
atomic_set(&bat_priv->ap_isolation, 0);
atomic_set(&bat_priv->vis_mode, BATADV_VIS_TYPE_CLIENT_UPDATE);
atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF);
@@ -436,7 +506,6 @@ struct net_device *batadv_softif_create(const char *name)
#endif
bat_priv->tt.last_changeset = NULL;
bat_priv->tt.last_changeset_len = 0;
- bat_priv->tt.poss_change = false;
bat_priv->primary_if = NULL;
bat_priv->num_ifaces = 0;
@@ -556,6 +625,13 @@ static const struct {
{ "tt_response_rx" },
{ "tt_roam_adv_tx" },
{ "tt_roam_adv_rx" },
+#ifdef CONFIG_BATMAN_ADV_DAT
+ { "dat_get_tx" },
+ { "dat_get_rx" },
+ { "dat_put_tx" },
+ { "dat_put_rx" },
+ { "dat_cached_reply_tx" },
+#endif
};
static void batadv_get_strings(struct net_device *dev, uint32_t stringset,
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