diff options
Diffstat (limited to 'net/batman-adv/soft-interface.c')
| -rw-r--r-- | net/batman-adv/soft-interface.c | 156 |
1 files changed, 131 insertions, 25 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index b9a28d2dd3e..2711e870f55 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -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" @@ -122,7 +124,6 @@ static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) batadv_tt_local_add(dev, addr->sa_data, BATADV_NULL_IFINDEX); } - dev->addr_assign_type &= ~NET_ADDR_RANDOM; return 0; } @@ -145,14 +146,17 @@ 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 +172,7 @@ static int batadv_interface_tx(struct sk_buff *skb, break; /* fall through */ - case BATADV_ETH_P_BATMAN: + case ETH_P_BATMAN: goto dropped; } @@ -176,14 +180,21 @@ static int batadv_interface_tx(struct sk_buff *skb, goto dropped; /* Register the client MAC in the transtable */ - batadv_tt_local_add(soft_iface, ethhdr->h_source, skb->skb_iif); + if (!is_multicast_ether_addr(ethhdr->h_source)) + batadv_tt_local_add(soft_iface, ethhdr->h_source, skb->skb_iif); /* 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, @@ -382,6 +449,30 @@ static void batadv_interface_setup(struct net_device *dev) memset(priv, 0, sizeof(*priv)); } +/** + * batadv_softif_destroy_finish - cleans up the remains of a softif + * @work: work queue item + * + * Free the parts of the soft interface which can not be removed under + * rtnl lock (to prevent deadlock situations). + */ +static void batadv_softif_destroy_finish(struct work_struct *work) +{ + struct batadv_priv *bat_priv; + struct net_device *soft_iface; + + bat_priv = container_of(work, struct batadv_priv, + cleanup_work); + soft_iface = bat_priv->soft_iface; + + batadv_debugfs_del_meshif(soft_iface); + batadv_sysfs_del_meshif(soft_iface); + + rtnl_lock(); + unregister_netdevice(soft_iface); + rtnl_unlock(); +} + struct net_device *batadv_softif_create(const char *name) { struct net_device *soft_iface; @@ -396,6 +487,8 @@ struct net_device *batadv_softif_create(const char *name) goto out; bat_priv = netdev_priv(soft_iface); + bat_priv->soft_iface = soft_iface; + INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish); /* batadv_interface_stats() needs to be available as soon as * register_netdevice() has been called @@ -413,7 +506,12 @@ struct net_device *batadv_softif_create(const char *name) atomic_set(&bat_priv->aggregated_ogms, 1); atomic_set(&bat_priv->bonding, 0); +#ifdef CONFIG_BATMAN_ADV_BLA atomic_set(&bat_priv->bridge_loop_avoidance, 0); +#endif +#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); @@ -421,7 +519,9 @@ struct net_device *batadv_softif_create(const char *name) atomic_set(&bat_priv->gw_bandwidth, 41); atomic_set(&bat_priv->orig_interval, 1000); atomic_set(&bat_priv->hop_penalty, 30); +#ifdef CONFIG_BATMAN_ADV_DEBUG atomic_set(&bat_priv->log_level, 0); +#endif atomic_set(&bat_priv->fragmentation, 1); atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); @@ -436,7 +536,6 @@ 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; @@ -478,10 +577,10 @@ out: void batadv_softif_destroy(struct net_device *soft_iface) { - batadv_debugfs_del_meshif(soft_iface); - batadv_sysfs_del_meshif(soft_iface); + struct batadv_priv *bat_priv = netdev_priv(soft_iface); + batadv_mesh_free(soft_iface); - unregister_netdevice(soft_iface); + queue_work(batadv_event_workqueue, &bat_priv->cleanup_work); } int batadv_softif_is_valid(const struct net_device *net_dev) @@ -512,10 +611,10 @@ static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) static void batadv_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { - strcpy(info->driver, "B.A.T.M.A.N. advanced"); - strcpy(info->version, BATADV_SOURCE_VERSION); - strcpy(info->fw_version, "N/A"); - strcpy(info->bus_info, "batman"); + strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); + strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); + strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); + strlcpy(info->bus_info, "batman", sizeof(info->bus_info)); } static u32 batadv_get_msglevel(struct net_device *dev) @@ -556,6 +655,13 @@ 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, |