/* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ #include "soft-interface.h" #include "main.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "bat_algo.h" #include "bridge_loop_avoidance.h" #include "debugfs.h" #include "distributed-arp-table.h" #include "gateway_client.h" #include "gateway_common.h" #include "hard-interface.h" #include "multicast.h" #include "network-coding.h" #include "originator.h" #include "packet.h" #include "send.h" #include "sysfs.h" #include "translation-table.h" 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); static u32 batadv_get_msglevel(struct net_device *dev); static void batadv_set_msglevel(struct net_device *dev, u32 value); static u32 batadv_get_link(struct net_device *dev); static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data); static void batadv_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data); static int batadv_get_sset_count(struct net_device *dev, int stringset); static const struct ethtool_ops batadv_ethtool_ops = { .get_settings = batadv_get_settings, .get_drvinfo = batadv_get_drvinfo, .get_msglevel = batadv_get_msglevel, .set_msglevel = batadv_set_msglevel, .get_link = batadv_get_link, .get_strings = batadv_get_strings, .get_ethtool_stats = batadv_get_ethtool_stats, .get_sset_count = batadv_get_sset_count, }; int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) { int result; /* TODO: We must check if we can release all references to non-payload * data using skb_header_release in our skbs to allow skb_cow_header to * work optimally. This means that those skbs are not allowed to read * or write any data which is before the current position of skb->data * after that call and thus allow other skbs with the same data buffer * to write freely in that area. */ result = skb_cow_head(skb, len); if (result < 0) return result; skb_push(skb, len); return 0; } static int batadv_interface_open(struct net_device *dev) { netif_start_queue(dev); return 0; } static int batadv_interface_release(struct net_device *dev) { netif_stop_queue(dev); return 0; } static struct net_device_stats *batadv_interface_stats(struct net_device *dev) { struct batadv_priv *bat_priv = netdev_priv(dev); struct net_device_stats *stats = &bat_priv->stats; stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX); stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES); stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED); stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX); stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES); return stats; } static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) { struct batadv_priv *bat_priv = netdev_priv(dev); struct batadv_softif_vlan *vlan; struct sockaddr *addr = p; u8 old_addr[ETH_ALEN]; if (!is_valid_ether_addr(addr->sa_data)) return -EADDRNOTAVAIL; ether_addr_copy(old_addr, dev->dev_addr); ether_addr_copy(dev->dev_addr, addr->sa_data); /* only modify transtable if it has been initialized before */ if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) return 0; rcu_read_lock(); hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { batadv_tt_local_remove(bat_priv, old_addr, vlan->vid, "mac address changed", false); batadv_tt_local_add(dev, addr->sa_data, vlan->vid, BATADV_NULL_IFINDEX, BATADV_NO_MARK); } rcu_read_unlock(); return 0; } static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) { /* check ranges */ if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev))) return -EINVAL; dev->mtu = new_mtu; return 0; } /** * batadv_interface_set_rx_mode - set the rx mode of a device * @dev: registered network device to modify * * We do not actually need to set any rx filters for the virtual batman * soft interface. However a dummy handler enables a user to set static * multicast listeners for instance. */ static void batadv_interface_set_rx_mode(struct net_device *dev) { } static int batadv_interface_tx(struct sk_buff *skb, struct net_device *soft_iface) { struct ethhdr *ethhdr; struct batadv_priv *bat_priv = netdev_priv(soft_iface); struct batadv_hard_iface *primary_if = NULL; struct batadv_bcast_packet *bcast_packet; static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, 0x00, 0x00}; static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, 0x00, 0x00}; enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO; u8 *dst_hint = NULL, chaddr[ETH_ALEN]; struct vlan_ethhdr *vhdr; unsigned int header_len = 0; int data_len = skb->len, ret; unsigned long brd_delay = 1; bool do_bcast = false, client_added; unsigned short vid; u32 seqno; int gw_mode; enum batadv_forw_mode forw_mode; struct batadv_orig_node *mcast_single_orig = NULL; int network_offset = ETH_HLEN; if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) goto dropped; netif_trans_update(soft_iface); vid = batadv_get_vid(skb, 0); ethhdr = eth_hdr(skb); switch (ntohs(ethhdr->h_proto)) { case ETH_P_8021Q: vhdr = vlan_eth_hdr(skb); /* drop batman-in-batman packets to prevent loops */ if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) { network_offset += VLAN_HLEN; break; } /* fall through */ case ETH_P_BATMAN: goto dropped; } skb_set_network_header(skb, network_offset); if (batadv_bla_tx(bat_priv, skb, vid)) goto dropped; /* skb->data might have been reallocated by batadv_bla_tx() */ ethhdr = eth_hdr(skb); /* Register the client MAC in the transtable */ if (!is_multicast_ether_addr(ethhdr->h_source)) { client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source, vid, skb->skb_iif, skb->mark); if (!client_added) goto dropped; } /* 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; gw_mode = atomic_read(&bat_priv->gw.mode); if (is_multicast_ether_addr(ethhdr->h_dest)) { /* if gw mode is off, broadcast every packet */ if (gw_mode == BATADV_GW_MODE_OFF) { do_bcast = true; goto send; } dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len, chaddr); /* skb->data may have been modified by * batadv_gw_dhcp_recipient_get() */ ethhdr = eth_hdr(skb); /* if gw_mode is on, broadcast any non-DHCP message. * All the DHCP packets are going to be sent as unicast */ if (dhcp_rcp == BATADV_DHCP_NO) { do_bcast = true; goto send; } if (dhcp_rcp == BATADV_DHCP_TO_CLIENT) dst_hint = chaddr; else if ((gw_mode == BATADV_GW_MODE_SERVER) && (dhcp_rcp == BATADV_DHCP_TO_SERVER)) /* gateways should not forward any DHCP message if * directed to a DHCP server */ goto dropped; send: if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) { forw_mode = batadv_mcast_forw_mode(bat_priv, skb, &mcast_single_orig); if (forw_mode == BATADV_FORW_NONE) goto dropped; if (forw_mode == BATADV_FORW_SINGLE) do_bcast = false; } } batadv_skb_set_priority(skb, 0); /* ethernet packet should be broadcasted */ if (do_bcast) { primary_if = batadv_primary_if_get_selected(bat_priv); 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; bcast_packet = (struct batadv_bcast_packet *)skb->data; bcast_packet->version = BATADV_COMPAT_VERSION; bcast_packet->ttl = BATADV_TTL; /* batman packet type: broadcast */ bcast_packet->packet_type = BATADV_BCAST; bcast_packet->reserved = 0; /* hw address of first interface is the orig mac because only * this mac is known throughout the mesh */ ether_addr_copy(bcast_packet->orig, primary_if->net_dev->dev_addr); /* set broadcast sequence number */ seqno = atomic_inc_return(&bat_priv->bcast_seqno); bcast_packet->seqno = htonl(seqno); batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay); /* a copy is stored in the bcast list, therefore removing * the original skb. */ kfree_skb(skb); /* unicast packet */ } else { /* DHCP packets going to a server will use the GW feature */ if (dhcp_rcp == BATADV_DHCP_TO_SERVER) { ret = batadv_gw_out_of_range(bat_priv, skb); if (ret) goto dropped; ret = batadv_send_skb_via_gw(bat_priv, skb, vid); } else if (mcast_single_orig) { ret = batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST, 0, mcast_single_orig, vid); } else { if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) goto dropped; batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint, vid); } if (ret == NET_XMIT_DROP) goto dropped_freed; } batadv_inc_counter(bat_priv, BATADV_CNT_TX); batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); goto end; dropped: kfree_skb(skb); dropped_freed: batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); end: if (mcast_single_orig) batadv_orig_node_put(mcast_single_orig); if (primary_if) batadv_hardif_put(primary_if); return NETDEV_TX_OK; } /** * batadv_interface_rx - receive ethernet frame on local batman-adv interface * @soft_iface: local interface which will receive the ethernet frame * @skb: ethernet frame for @soft_iface * @hdr_size: size of already parsed batman-adv header * @orig_node: originator from which the batman-adv packet was sent * * Sends a ethernet frame to the receive path of the local @soft_iface. * skb->data has still point to the batman-adv header with the size @hdr_size. * The caller has to have parsed this header already and made sure that at least * @hdr_size bytes are still available for pull in @skb. * * The packet may still get dropped. This can happen when the encapsulated * ethernet frame is invalid or contains again an batman-adv packet. Also * unicast packets will be dropped directly when it was sent between two * isolated clients. */ void batadv_interface_rx(struct net_device *soft_iface, struct sk_buff *skb, int hdr_size, struct batadv_orig_node *orig_node) { struct batadv_bcast_packet *batadv_bcast_packet; struct batadv_priv *bat_priv = netdev_priv(soft_iface); struct vlan_ethhdr *vhdr; struct ethhdr *ethhdr; unsigned short vid; bool is_bcast; batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST); skb_pull_rcsum(skb, hdr_size); skb_reset_mac_header(skb); /* clean the netfilter state now that the batman-adv header has been * removed */ nf_reset(skb); if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) goto dropped; vid = batadv_get_vid(skb, 0); ethhdr = eth_hdr(skb); switch (ntohs(ethhdr->h_proto)) { case ETH_P_8021Q: if (!pskb_may_pull(skb, VLAN_ETH_HLEN)) goto dropped; vhdr = (struct vlan_ethhdr *)skb->data; /* drop batman-in-batman packets to prevent loops */ if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) break; /* fall through */ case ETH_P_BATMAN: goto dropped; } /* skb->dev & skb->pkt_type are set here */ skb->protocol = eth_type_trans(skb, soft_iface); /* should not be necessary anymore as we use skb_pull_rcsum() * TODO: please verify this and remove this TODO * -- Dec 21st 2009, Simon Wunderlich */ /* skb->ip_summed = CHECKSUM_UNNECESSARY; */ batadv_inc_counter(bat_priv, BATADV_CNT_RX); batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, skb->len + ETH_HLEN); 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, vid); if (is_multicast_ether_addr(ethhdr->h_dest)) { /* set the mark on broadcast packets if AP isolation is ON and * the packet is coming from an "isolated" client */ if (batadv_vlan_ap_isola_get(bat_priv, vid) && batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source, vid)) { /* save bits in skb->mark not covered by the mask and * apply the mark on the rest */ skb->mark &= ~bat_priv->isolation_mark_mask; skb->mark |= bat_priv->isolation_mark; } } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest, vid)) { goto dropped; } netif_rx(skb); goto out; dropped: kfree_skb(skb); out: return; } /** * batadv_softif_vlan_release - release vlan from lists and queue for free after * rcu grace period * @ref: kref pointer of the vlan object */ static void batadv_softif_vlan_release(struct kref *ref) { struct batadv_softif_vlan *vlan; vlan = container_of(ref, struct batadv_softif_vlan, refcount); spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock); hlist_del_rcu(&vlan->list); spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock); kfree_rcu(vlan, rcu); } /** * batadv_softif_vlan_put - decrease the vlan object refcounter and * possibly release it * @vlan: the vlan object to release */ void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan) { if (!vlan) return; kref_put(&vlan->refcount, batadv_softif_vlan_release); } /** * batadv_softif_vlan_get - get the vlan object for a specific vid * @bat_priv: the bat priv with all the soft interface information * @vid: the identifier of the vlan object to retrieve * * Return: the private data of the vlan matching the vid passed as argument or * NULL otherwise. The refcounter of the returned object is incremented by 1. */ struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv, unsigned short vid) { struct batadv_softif_vlan *vlan_tmp, *vlan = NULL; rcu_read_lock(); hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) { if (vlan_tmp->vid != vid) continue; if (!kref_get_unless_zero(&vlan_tmp->refcount)) continue; vlan = vlan_tmp; break; } rcu_read_unlock(); return vlan; } /** * batadv_softif_create_vlan - allocate the needed resources for a new vlan * @bat_priv: the bat priv with all the soft interface information * @vid: the VLAN identifier * * Return: 0 on success, a negative error otherwise. */ int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) { struct batadv_softif_vlan *vlan; int err; vlan = batadv_softif_vlan_get(bat_priv, vid); if (vlan) { batadv_softif_vlan_put(vlan); return -EEXIST; } vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); if (!vlan) return -ENOMEM; vlan->bat_priv = bat_priv; vlan->vid = vid; kref_init(&vlan->refcount); atomic_set(&vlan->ap_isolation, 0); err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); if (err) { kfree(vlan); return err; } spin_lock_bh(&bat_priv->softif_vlan_list_lock); kref_get(&vlan->refcount); hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); spin_unlock_bh(&bat_priv->softif_vlan_list_lock); /* add a new TT local entry. This one will be marked with the NOPURGE * flag */ batadv_tt_local_add(bat_priv->soft_iface, bat_priv->soft_iface->dev_addr, vid, BATADV_NULL_IFINDEX, BATADV_NO_MARK); /* don't return reference to new softif_vlan */ batadv_softif_vlan_put(vlan); return 0; } /** * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object * @bat_priv: the bat priv with all the soft interface information * @vlan: the object to remove */ static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv, struct batadv_softif_vlan *vlan) { /* explicitly remove the associated TT local entry because it is marked * with the NOPURGE flag */ batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr, vlan->vid, "vlan interface destroyed", false); batadv_sysfs_del_vlan(bat_priv, vlan); batadv_softif_vlan_put(vlan); } /** * batadv_interface_add_vid - ndo_add_vid API implementation * @dev: the netdev of the mesh interface * @proto: protocol of the the vlan id * @vid: identifier of the new vlan * * Set up all the internal structures for handling the new vlan on top of the * mesh interface * * Return: 0 on success or a negative error code in case of failure. */ static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, unsigned short vid) { struct batadv_priv *bat_priv = netdev_priv(dev); struct batadv_softif_vlan *vlan; int ret; /* only 802.1Q vlans are supported. * batman-adv does not know how to handle other types */ if (proto != htons(ETH_P_8021Q)) return -EINVAL; vid |= BATADV_VLAN_HAS_TAG; /* if a new vlan is getting created and it already exists, it means that * it was not deleted yet. batadv_softif_vlan_get() increases the * refcount in order to revive the object. * * if it does not exist then create it. */ vlan = batadv_softif_vlan_get(bat_priv, vid); if (!vlan) return batadv_softif_create_vlan(bat_priv, vid); /* recreate the sysfs object if it was already destroyed (and it should * be since we received a kill_vid() for this vlan */ if (!vlan->kobj) { ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); if (ret) { batadv_softif_vlan_put(vlan); return ret; } } /* add a new TT local entry. This one will be marked with the NOPURGE * flag. This must be added again, even if the vlan object already * exists, because the entry was deleted by kill_vid() */ batadv_tt_local_add(bat_priv->soft_iface, bat_priv->soft_iface->dev_addr, vid, BATADV_NULL_IFINDEX, BATADV_NO_MARK); return 0; } /** * batadv_interface_kill_vid - ndo_kill_vid API implementation * @dev: the netdev of the mesh interface * @proto: protocol of the the vlan id * @vid: identifier of the deleted vlan * * Destroy all the internal structures used to handle the vlan identified by vid * on top of the mesh interface * * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q * or -ENOENT if the specified vlan id wasn't registered. */ static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto, unsigned short vid) { struct batadv_priv *bat_priv = netdev_priv(dev); struct batadv_softif_vlan *vlan; /* only 802.1Q vlans are supported. batman-adv does not know how to * handle other types */ if (proto != htons(ETH_P_8021Q)) return -EINVAL; vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); if (!vlan) return -ENOENT; batadv_softif_destroy_vlan(bat_priv, vlan); /* finally free the vlan object */ batadv_softif_vlan_put(vlan); return 0; } /* 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 - late stage initialization of soft interface * @dev: registered network device to modify * * Return: error code on failures */ static int batadv_softif_init_late(struct net_device *dev) { struct batadv_priv *bat_priv; u32 random_seqno; int ret; size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM; batadv_set_lockdep_class(dev); bat_priv = netdev_priv(dev); bat_priv->soft_iface = dev; /* batadv_interface_stats() needs to be available as soon as * register_netdevice() has been called */ bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64)); if (!bat_priv->bat_counters) return -ENOMEM; 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, 1); #endif #ifdef CONFIG_BATMAN_ADV_DAT atomic_set(&bat_priv->distributed_arp_table, 1); #endif #ifdef CONFIG_BATMAN_ADV_MCAST bat_priv->mcast.querier_ipv4.exists = false; bat_priv->mcast.querier_ipv4.shadowing = false; bat_priv->mcast.querier_ipv6.exists = false; bat_priv->mcast.querier_ipv6.shadowing = false; bat_priv->mcast.flags = BATADV_NO_FLAGS; atomic_set(&bat_priv->multicast_mode, 1); atomic_set(&bat_priv->mcast.num_disabled, 0); atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0); atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0); atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0); #endif atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF); atomic_set(&bat_priv->gw.sel_class, 20); atomic_set(&bat_priv->gw.bandwidth_down, 100); atomic_set(&bat_priv->gw.bandwidth_up, 20); 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->packet_size_max, ETH_DATA_LEN); atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); atomic_set(&bat_priv->bcast_seqno, 1); atomic_set(&bat_priv->tt.vn, 0); atomic_set(&bat_priv->tt.local_changes, 0); atomic_set(&bat_priv->tt.ogm_append_cnt, 0); #ifdef CONFIG_BATMAN_ADV_BLA atomic_set(&bat_priv->bla.num_requests, 0); #endif atomic_set(&bat_priv->tp_num, 0); bat_priv->tt.last_changeset = NULL; bat_priv->tt.last_changeset_len = 0; bat_priv->isolation_mark = 0; bat_priv->isolation_mark_mask = 0; /* randomize initial seqno to avoid collision */ get_random_bytes(&random_seqno, sizeof(random_seqno)); atomic_set(&bat_priv->frag_seqno, random_seqno); bat_priv->primary_if = NULL; bat_priv->num_ifaces = 0; batadv_nc_init_bat_priv(bat_priv); ret = batadv_algo_select(bat_priv, batadv_routing_algo); if (ret < 0) goto free_bat_counters; ret = batadv_debugfs_add_meshif(dev); if (ret < 0) goto free_bat_counters; ret = batadv_mesh_init(dev); if (ret < 0) goto unreg_debugfs; return 0; unreg_debugfs: batadv_debugfs_del_meshif(dev); free_bat_counters: free_percpu(bat_priv->bat_counters); bat_priv->bat_counters = NULL; return ret; } /** * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface * @dev: batadv_soft_interface used as master interface * @slave_dev: net_device which should become the slave interface * * Return: 0 if successful or error otherwise. */ static int batadv_softif_slave_add(struct net_device *dev, struct net_device *slave_dev) { struct batadv_hard_iface *hard_iface; struct net *net = dev_net(dev); int ret = -EINVAL; hard_iface = batadv_hardif_get_by_netdev(slave_dev); if (!hard_iface || hard_iface->soft_iface) goto out; ret = batadv_hardif_enable_interface(hard_iface, net, dev->name); out: if (hard_iface) batadv_hardif_put(hard_iface); return ret; } /** * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface * @dev: batadv_soft_interface used as master interface * @slave_dev: net_device which should be removed from the master interface * * Return: 0 if successful or error otherwise. */ static int batadv_softif_slave_del(struct net_device *dev, struct net_device *slave_dev) { struct batadv_hard_iface *hard_iface; int ret = -EINVAL; hard_iface = batadv_hardif_get_by_netdev(slave_dev); if (!hard_iface || hard_iface->soft_iface != dev) goto out; batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); ret = 0; out: if (hard_iface) batadv_hardif_put(hard_iface); return ret; } static const struct net_device_ops batadv_netdev_ops = { .ndo_init = batadv_softif_init_late, .ndo_open = batadv_interface_open, .ndo_stop = batadv_interface_release, .ndo_get_stats = batadv_interface_stats, .ndo_vlan_rx_add_vid = batadv_interface_add_vid, .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid, .ndo_set_mac_address = batadv_interface_set_mac_addr, .ndo_change_mtu = batadv_interface_change_mtu, .ndo_set_rx_mode = batadv_interface_set_rx_mode, .ndo_start_xmit = batadv_interface_tx, .ndo_validate_addr = eth_validate_addr, .ndo_add_slave = batadv_softif_slave_add, .ndo_del_slave = batadv_softif_slave_del, }; /** * batadv_softif_free - Deconstructor of batadv_soft_interface * @dev: Device to cleanup and remove */ static void batadv_softif_free(struct net_device *dev) { batadv_debugfs_del_meshif(dev); batadv_mesh_free(dev); /* some scheduled RCU callbacks need the bat_priv struct to accomplish * their tasks. Wait for them all to be finished before freeing the * netdev and its private data (bat_priv) */ rcu_barrier(); free_netdev(dev); } /** * batadv_softif_init_early - early stage initialization of soft interface * @dev: registered network device to modify */ static void batadv_softif_init_early(struct net_device *dev) { struct batadv_priv *priv = netdev_priv(dev); ether_setup(dev); dev->netdev_ops = &batadv_netdev_ops; dev->destructor = batadv_softif_free; dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL; dev->priv_flags |= IFF_NO_QUEUE; /* can't call min_mtu, because the needed variables * have not been initialized yet */ dev->mtu = ETH_DATA_LEN; /* generate random address */ eth_hw_addr_random(dev); dev->ethtool_ops = &batadv_ethtool_ops; memset(priv, 0, sizeof(*priv)); } struct net_device *batadv_softif_create(struct net *net, const char *name) { struct net_device *soft_iface; int ret; soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, NET_NAME_UNKNOWN, batadv_softif_init_early); if (!soft_iface) return NULL; dev_net_set(soft_iface, net); soft_iface->rtnl_link_ops = &batadv_link_ops; ret = register_netdevice(soft_iface); if (ret < 0) { pr_err("Unable to register the batman interface '%s': %i\n", name, ret); free_netdev(soft_iface); return NULL; } return soft_iface; } /** * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs * @soft_iface: the to-be-removed batman-adv interface */ void batadv_softif_destroy_sysfs(struct net_device *soft_iface) { struct batadv_priv *bat_priv = netdev_priv(soft_iface); struct batadv_softif_vlan *vlan; ASSERT_RTNL(); /* destroy the "untagged" VLAN */ vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); if (vlan) { batadv_softif_destroy_vlan(bat_priv, vlan); batadv_softif_vlan_put(vlan); } batadv_sysfs_del_meshif(soft_iface); unregister_netdevice(soft_iface); } /** * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink * @soft_iface: the to-be-removed batman-adv interface * @head: list pointer */ static void batadv_softif_destroy_netlink(struct net_device *soft_iface, struct list_head *head) { struct batadv_priv *bat_priv = netdev_priv(soft_iface); struct batadv_hard_iface *hard_iface; struct batadv_softif_vlan *vlan; list_for_each_entry(hard_iface, &batadv_hardif_list, list) { if (hard_iface->soft_iface == soft_iface) batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); } /* destroy the "untagged" VLAN */ vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); if (vlan) { batadv_softif_destroy_vlan(bat_priv, vlan); batadv_softif_vlan_put(vlan); } batadv_sysfs_del_meshif(soft_iface); unregister_netdevice_queue(soft_iface, head); } bool batadv_softif_is_valid(const struct net_device *net_dev) { if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) return true; return false; } struct rtnl_link_ops batadv_link_ops __read_mostly = { .kind = "batadv", .priv_size = sizeof(struct batadv_priv), .setup = batadv_softif_init_early, .dellink = batadv_softif_destroy_netlink, }; /* ethtool */ static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { cmd->supported = 0; cmd->advertising = 0; ethtool_cmd_speed_set(cmd, SPEED_10); cmd->duplex = DUPLEX_FULL; cmd->port = PORT_TP; cmd->phy_address = 0; cmd->transceiver = XCVR_INTERNAL; cmd->autoneg = AUTONEG_DISABLE; cmd->maxtxpkt = 0; cmd->maxrxpkt = 0; return 0; } static void batadv_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { 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) { return -EOPNOTSUPP; } static void batadv_set_msglevel(struct net_device *dev, u32 value) { } static u32 batadv_get_link(struct net_device *dev) { return 1; } /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 * Declare each description string in struct.name[] to get fixed sized buffer * and compile time checking for strings longer than ETH_GSTRING_LEN. */ static const struct { const char name[ETH_GSTRING_LEN]; } batadv_counters_strings[] = { { "tx" }, { "tx_bytes" }, { "tx_dropped" }, { "rx" }, { "rx_bytes" }, { "forward" }, { "forward_bytes" }, { "mgmt_tx" }, { "mgmt_tx_bytes" }, { "mgmt_rx" }, { "mgmt_rx_bytes" }, { "frag_tx" }, { "frag_tx_bytes" }, { "frag_rx" }, { "frag_rx_bytes" }, { "frag_fwd" }, { "frag_fwd_bytes" }, { "tt_request_tx" }, { "tt_request_rx" }, { "tt_response_tx" }, { "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 #ifdef CONFIG_BATMAN_ADV_NC { "nc_code" }, { "nc_code_bytes" }, { "nc_recode" }, { "nc_recode_bytes" }, { "nc_buffer" }, { "nc_decode" }, { "nc_decode_bytes" }, { "nc_decode_failed" }, { "nc_sniffed" }, #endif }; static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data) { if (stringset == ETH_SS_STATS) memcpy(data, batadv_counters_strings, sizeof(batadv_counters_strings)); } static void batadv_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data) { struct batadv_priv *bat_priv = netdev_priv(dev); int i; for (i = 0; i < BATADV_CNT_NUM; i++) data[i] = batadv_sum_counter(bat_priv, i); } static int batadv_get_sset_count(struct net_device *dev, int stringset) { if (stringset == ETH_SS_STATS) return BATADV_CNT_NUM; return -EOPNOTSUPP; }