diff options
Diffstat (limited to 'net/batman-adv')
44 files changed, 3791 insertions, 1373 deletions
diff --git a/net/batman-adv/Kconfig b/net/batman-adv/Kconfig index fa780b76630..11660a3aab5 100644 --- a/net/batman-adv/Kconfig +++ b/net/batman-adv/Kconfig @@ -50,6 +50,15 @@ config BATMAN_ADV_NC If you think that your network does not need this feature you can safely disable it and save some space. +config BATMAN_ADV_MCAST + bool "Multicast optimisation" + depends on BATMAN_ADV + default n + help + This option enables the multicast optimisation which aims to + reduce the air overhead while improving the reliability of + multicast messages. + config BATMAN_ADV_DEBUG bool "B.A.T.M.A.N. debugging" depends on BATMAN_ADV diff --git a/net/batman-adv/Makefile b/net/batman-adv/Makefile index 4f4aabbd8ea..eb7d8c0388e 100644 --- a/net/batman-adv/Makefile +++ b/net/batman-adv/Makefile @@ -1,5 +1,5 @@ # -# Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +# Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: # # Marek Lindner, Simon Wunderlich # @@ -13,9 +13,7 @@ # General Public License for more details. # # You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -# 02110-1301, USA +# along with this program; if not, see <http://www.gnu.org/licenses/>. # obj-$(CONFIG_BATMAN_ADV) += batman-adv.o @@ -38,3 +36,4 @@ batman-adv-y += send.o batman-adv-y += soft-interface.o batman-adv-y += sysfs.o batman-adv-y += translation-table.o +batman-adv-$(CONFIG_BATMAN_ADV_MCAST) += multicast.o diff --git a/net/batman-adv/bat_algo.h b/net/batman-adv/bat_algo.h index a4808c29ea3..4e49666f8c6 100644 --- a/net/batman-adv/bat_algo.h +++ b/net/batman-adv/bat_algo.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2011-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2011-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_BAT_ALGO_H_ diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index a2b480a9087..f04224c3200 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -243,19 +241,19 @@ batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const uint8_t *addr) size = bat_priv->num_ifaces * sizeof(uint8_t); orig_node->bat_iv.bcast_own_sum = kzalloc(size, GFP_ATOMIC); if (!orig_node->bat_iv.bcast_own_sum) - goto free_bcast_own; + goto free_orig_node; hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, batadv_choose_orig, orig_node, &orig_node->hash_entry); if (hash_added != 0) - goto free_bcast_own; + goto free_orig_node; return orig_node; -free_bcast_own: - kfree(orig_node->bat_iv.bcast_own); free_orig_node: + /* free twice, as batadv_orig_node_new sets refcount to 2 */ + batadv_orig_node_free_ref(orig_node); batadv_orig_node_free_ref(orig_node); return NULL; @@ -268,22 +266,39 @@ batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, struct batadv_orig_node *orig_neigh) { struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); - struct batadv_neigh_node *neigh_node; + struct batadv_neigh_node *neigh_node, *tmp_neigh_node; neigh_node = batadv_neigh_node_new(hard_iface, neigh_addr, orig_node); if (!neigh_node) goto out; - spin_lock_init(&neigh_node->bat_iv.lq_update_lock); + if (!atomic_inc_not_zero(&hard_iface->refcount)) { + kfree(neigh_node); + neigh_node = NULL; + goto out; + } - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "Creating new neighbor %pM for orig_node %pM on interface %s\n", - neigh_addr, orig_node->orig, hard_iface->net_dev->name); + neigh_node->orig_node = orig_neigh; + neigh_node->if_incoming = hard_iface; spin_lock_bh(&orig_node->neigh_list_lock); - hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); + tmp_neigh_node = batadv_neigh_node_get(orig_node, hard_iface, + neigh_addr); + if (!tmp_neigh_node) { + hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); + } else { + kfree(neigh_node); + batadv_hardif_free_ref(hard_iface); + neigh_node = tmp_neigh_node; + } spin_unlock_bh(&orig_node->neigh_list_lock); + if (!tmp_neigh_node) + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "Creating new neighbor %pM for orig_node %pM on interface %s\n", + neigh_addr, orig_node->orig, + hard_iface->net_dev->name); + out: return neigh_node; } @@ -307,9 +322,9 @@ static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) hard_iface->bat_iv.ogm_buff = ogm_buff; batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; - batadv_ogm_packet->header.packet_type = BATADV_IV_OGM; - batadv_ogm_packet->header.version = BATADV_COMPAT_VERSION; - batadv_ogm_packet->header.ttl = 2; + batadv_ogm_packet->packet_type = BATADV_IV_OGM; + batadv_ogm_packet->version = BATADV_COMPAT_VERSION; + batadv_ogm_packet->ttl = 2; batadv_ogm_packet->flags = BATADV_NO_FLAGS; batadv_ogm_packet->reserved = 0; batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; @@ -332,10 +347,10 @@ static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; - memcpy(batadv_ogm_packet->orig, - hard_iface->net_dev->dev_addr, ETH_ALEN); - memcpy(batadv_ogm_packet->prev_sender, - hard_iface->net_dev->dev_addr, ETH_ALEN); + ether_addr_copy(batadv_ogm_packet->orig, + hard_iface->net_dev->dev_addr); + ether_addr_copy(batadv_ogm_packet->prev_sender, + hard_iface->net_dev->dev_addr); } static void @@ -346,7 +361,7 @@ batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; batadv_ogm_packet->flags = BATADV_PRIMARIES_FIRST_HOP; - batadv_ogm_packet->header.ttl = BATADV_TTL; + batadv_ogm_packet->ttl = BATADV_TTL; } /* when do we schedule our own ogm to be sent */ @@ -435,7 +450,7 @@ static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, fwd_str, (packet_num > 0 ? "aggregated " : ""), batadv_ogm_packet->orig, ntohl(batadv_ogm_packet->seqno), - batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl, + batadv_ogm_packet->tq, batadv_ogm_packet->ttl, (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? "on" : "off"), hard_iface->net_dev->name, @@ -461,17 +476,9 @@ static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, /* send a batman ogm packet */ static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) { - struct batadv_hard_iface *hard_iface; struct net_device *soft_iface; struct batadv_priv *bat_priv; struct batadv_hard_iface *primary_if = NULL; - struct batadv_ogm_packet *batadv_ogm_packet; - unsigned char directlink; - uint8_t *packet_pos; - - packet_pos = forw_packet->skb->data; - batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; - directlink = (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? 1 : 0); if (!forw_packet->if_incoming) { pr_err("Error - can't forward packet: incoming iface not specified\n"); @@ -481,59 +488,48 @@ static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) soft_iface = forw_packet->if_incoming->soft_iface; bat_priv = netdev_priv(soft_iface); - if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) + if (WARN_ON(!forw_packet->if_outgoing)) goto out; - primary_if = batadv_primary_if_get_selected(bat_priv); - if (!primary_if) + if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) goto out; - /* multihomed peer assumed - * non-primary OGMs are only broadcasted on their interface - */ - if ((directlink && (batadv_ogm_packet->header.ttl == 1)) || - (forw_packet->own && (forw_packet->if_incoming != primary_if))) { - /* FIXME: what about aggregated packets ? */ - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "%s packet (originator %pM, seqno %u, TTL %d) on interface %s [%pM]\n", - (forw_packet->own ? "Sending own" : "Forwarding"), - batadv_ogm_packet->orig, - ntohl(batadv_ogm_packet->seqno), - batadv_ogm_packet->header.ttl, - forw_packet->if_incoming->net_dev->name, - forw_packet->if_incoming->net_dev->dev_addr); - - /* skb is only used once and than forw_packet is free'd */ - batadv_send_skb_packet(forw_packet->skb, - forw_packet->if_incoming, - batadv_broadcast_addr); - forw_packet->skb = NULL; - + if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) goto out; - } - /* broadcast on every interface */ - rcu_read_lock(); - list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { - if (hard_iface->soft_iface != soft_iface) - continue; + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if) + goto out; - batadv_iv_ogm_send_to_if(forw_packet, hard_iface); - } - rcu_read_unlock(); + /* only for one specific outgoing interface */ + batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); out: if (primary_if) batadv_hardif_free_ref(primary_if); } -/* return true if new_packet can be aggregated with forw_packet */ +/** + * batadv_iv_ogm_can_aggregate - find out if an OGM can be aggregated on an + * existing forward packet + * @new_bat_ogm_packet: OGM packet to be aggregated + * @bat_priv: the bat priv with all the soft interface information + * @packet_len: (total) length of the OGM + * @send_time: timestamp (jiffies) when the packet is to be sent + * @direktlink: true if this is a direct link packet + * @if_incoming: interface where the packet was received + * @if_outgoing: interface for which the retransmission should be considered + * @forw_packet: the forwarded packet which should be checked + * + * Returns true if new_packet can be aggregated with forw_packet + */ static bool batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, struct batadv_priv *bat_priv, int packet_len, unsigned long send_time, bool directlink, const struct batadv_hard_iface *if_incoming, + const struct batadv_hard_iface *if_outgoing, const struct batadv_forw_packet *forw_packet) { struct batadv_ogm_packet *batadv_ogm_packet; @@ -567,12 +563,16 @@ batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, if (!primary_if) goto out; + /* packet is not leaving on the same interface. */ + if (forw_packet->if_outgoing != if_outgoing) + goto out; + /* packets without direct link flag and high TTL * are flooded through the net */ if ((!directlink) && (!(batadv_ogm_packet->flags & BATADV_DIRECTLINK)) && - (batadv_ogm_packet->header.ttl != 1) && + (batadv_ogm_packet->ttl != 1) && /* own packets originating non-primary * interfaces leave only that interface @@ -587,7 +587,7 @@ batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, * interface only - we still can aggregate */ if ((directlink) && - (new_bat_ogm_packet->header.ttl == 1) && + (new_bat_ogm_packet->ttl == 1) && (forw_packet->if_incoming == if_incoming) && /* packets from direct neighbors or @@ -608,11 +608,22 @@ out: return res; } -/* create a new aggregated packet and add this packet to it */ +/** + * batadv_iv_ogm_aggregate_new - create a new aggregated packet and add this + * packet to it. + * @packet_buff: pointer to the OGM + * @packet_len: (total) length of the OGM + * @send_time: timestamp (jiffies) when the packet is to be sent + * @direct_link: whether this OGM has direct link status + * @if_incoming: interface where the packet was received + * @if_outgoing: interface for which the retransmission should be considered + * @own_packet: true if it is a self-generated ogm + */ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, int packet_len, unsigned long send_time, bool direct_link, struct batadv_hard_iface *if_incoming, + struct batadv_hard_iface *if_outgoing, int own_packet) { struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); @@ -623,6 +634,9 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, if (!atomic_inc_not_zero(&if_incoming->refcount)) return; + if (!atomic_inc_not_zero(&if_outgoing->refcount)) + goto out_free_incoming; + /* own packet should always be scheduled */ if (!own_packet) { if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { @@ -663,6 +677,7 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, forw_packet_aggr->own = own_packet; forw_packet_aggr->if_incoming = if_incoming; + forw_packet_aggr->if_outgoing = if_outgoing; forw_packet_aggr->num_packets = 0; forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; forw_packet_aggr->send_time = send_time; @@ -685,6 +700,8 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, return; out: + batadv_hardif_free_ref(if_outgoing); +out_free_incoming: batadv_hardif_free_ref(if_incoming); } @@ -708,10 +725,21 @@ static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, } } +/** + * batadv_iv_ogm_queue_add - queue up an OGM for transmission + * @bat_priv: the bat priv with all the soft interface information + * @packet_buff: pointer to the OGM + * @packet_len: (total) length of the OGM + * @if_incoming: interface where the packet was received + * @if_outgoing: interface for which the retransmission should be considered + * @own_packet: true if it is a self-generated ogm + * @send_time: timestamp (jiffies) when the packet is to be sent + */ static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, unsigned char *packet_buff, int packet_len, struct batadv_hard_iface *if_incoming, + struct batadv_hard_iface *if_outgoing, int own_packet, unsigned long send_time) { /* _aggr -> pointer to the packet we want to aggregate with @@ -737,6 +765,7 @@ static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, bat_priv, packet_len, send_time, direct_link, if_incoming, + if_outgoing, forw_packet_pos)) { forw_packet_aggr = forw_packet_pos; break; @@ -760,7 +789,8 @@ static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, batadv_iv_ogm_aggregate_new(packet_buff, packet_len, send_time, direct_link, - if_incoming, own_packet); + if_incoming, if_outgoing, + own_packet); } else { batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, packet_len, direct_link); @@ -773,12 +803,13 @@ static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, struct batadv_ogm_packet *batadv_ogm_packet, bool is_single_hop_neigh, bool is_from_best_next_hop, - struct batadv_hard_iface *if_incoming) + struct batadv_hard_iface *if_incoming, + struct batadv_hard_iface *if_outgoing) { struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); uint16_t tvlv_len; - if (batadv_ogm_packet->header.ttl <= 1) { + if (batadv_ogm_packet->ttl <= 1) { batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); return; } @@ -798,8 +829,8 @@ static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); - batadv_ogm_packet->header.ttl--; - memcpy(batadv_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN); + batadv_ogm_packet->ttl--; + ether_addr_copy(batadv_ogm_packet->prev_sender, ethhdr->h_source); /* apply hop penalty */ batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, @@ -807,7 +838,7 @@ static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "Forwarding packet: tq: %i, ttl: %i\n", - batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl); + batadv_ogm_packet->tq, batadv_ogm_packet->ttl); /* switch of primaries first hop flag when forwarding */ batadv_ogm_packet->flags &= ~BATADV_PRIMARIES_FIRST_HOP; @@ -818,7 +849,8 @@ static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, BATADV_OGM_HLEN + tvlv_len, - if_incoming, 0, batadv_iv_ogm_fwd_send_time()); + if_incoming, if_outgoing, 0, + batadv_iv_ogm_fwd_send_time()); } /** @@ -863,10 +895,11 @@ static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; struct batadv_ogm_packet *batadv_ogm_packet; - struct batadv_hard_iface *primary_if; + struct batadv_hard_iface *primary_if, *tmp_hard_iface; int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; uint32_t seqno; uint16_t tvlv_len = 0; + unsigned long send_time; primary_if = batadv_primary_if_get_selected(bat_priv); @@ -889,23 +922,60 @@ static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) atomic_inc(&hard_iface->bat_iv.ogm_seqno); batadv_iv_ogm_slide_own_bcast_window(hard_iface); - batadv_iv_ogm_queue_add(bat_priv, hard_iface->bat_iv.ogm_buff, - hard_iface->bat_iv.ogm_buff_len, hard_iface, 1, - batadv_iv_ogm_emit_send_time(bat_priv)); + send_time = batadv_iv_ogm_emit_send_time(bat_priv); + + if (hard_iface != primary_if) { + /* OGMs from secondary interfaces are only scheduled on their + * respective interfaces. + */ + batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, + hard_iface, hard_iface, 1, send_time); + goto out; + } + + /* OGMs from primary interfaces are scheduled on all + * interfaces. + */ + rcu_read_lock(); + list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { + if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) + continue; + batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, + *ogm_buff_len, hard_iface, + tmp_hard_iface, 1, send_time); + } + rcu_read_unlock(); + +out: if (primary_if) batadv_hardif_free_ref(primary_if); } +/** + * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an + * originator + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: the orig node who originally emitted the ogm packet + * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node + * @ethhdr: Ethernet header of the OGM + * @batadv_ogm_packet: the ogm packet + * @if_incoming: interface where the packet was received + * @if_outgoing: interface for which the retransmission should be considered + * @dup_status: the duplicate status of this ogm packet. + */ static void batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, + struct batadv_orig_ifinfo *orig_ifinfo, const struct ethhdr *ethhdr, const struct batadv_ogm_packet *batadv_ogm_packet, struct batadv_hard_iface *if_incoming, - const unsigned char *tt_buff, + struct batadv_hard_iface *if_outgoing, enum batadv_dup_status dup_status) { + struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; + struct batadv_neigh_ifinfo *router_ifinfo = NULL; struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; struct batadv_neigh_node *router = NULL; struct batadv_orig_node *orig_node_tmp; @@ -933,12 +1003,21 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, if (dup_status != BATADV_NO_DUP) continue; - spin_lock_bh(&tmp_neigh_node->bat_iv.lq_update_lock); - batadv_ring_buffer_set(tmp_neigh_node->bat_iv.tq_recv, - &tmp_neigh_node->bat_iv.tq_index, 0); - tq_avg = batadv_ring_buffer_avg(tmp_neigh_node->bat_iv.tq_recv); - tmp_neigh_node->bat_iv.tq_avg = tq_avg; - spin_unlock_bh(&tmp_neigh_node->bat_iv.lq_update_lock); + /* only update the entry for this outgoing interface */ + neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, + if_outgoing); + if (!neigh_ifinfo) + continue; + + spin_lock_bh(&tmp_neigh_node->ifinfo_lock); + batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, + &neigh_ifinfo->bat_iv.tq_index, 0); + tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); + neigh_ifinfo->bat_iv.tq_avg = tq_avg; + spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); + + batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + neigh_ifinfo = NULL; } if (!neigh_node) { @@ -960,39 +1039,49 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, "Updating existing last-hop neighbor of originator\n"); rcu_read_unlock(); + neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); + if (!neigh_ifinfo) + goto out; neigh_node->last_seen = jiffies; - spin_lock_bh(&neigh_node->bat_iv.lq_update_lock); - batadv_ring_buffer_set(neigh_node->bat_iv.tq_recv, - &neigh_node->bat_iv.tq_index, + spin_lock_bh(&neigh_node->ifinfo_lock); + batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, + &neigh_ifinfo->bat_iv.tq_index, batadv_ogm_packet->tq); - tq_avg = batadv_ring_buffer_avg(neigh_node->bat_iv.tq_recv); - neigh_node->bat_iv.tq_avg = tq_avg; - spin_unlock_bh(&neigh_node->bat_iv.lq_update_lock); + tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); + neigh_ifinfo->bat_iv.tq_avg = tq_avg; + spin_unlock_bh(&neigh_node->ifinfo_lock); if (dup_status == BATADV_NO_DUP) { - orig_node->last_ttl = batadv_ogm_packet->header.ttl; - neigh_node->last_ttl = batadv_ogm_packet->header.ttl; + orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; + neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; } - batadv_bonding_candidate_add(bat_priv, orig_node, neigh_node); - /* if this neighbor already is our next hop there is nothing * to change */ - router = batadv_orig_node_get_router(orig_node); + router = batadv_orig_router_get(orig_node, if_outgoing); if (router == neigh_node) goto out; - /* if this neighbor does not offer a better TQ we won't consider it */ - if (router && (router->bat_iv.tq_avg > neigh_node->bat_iv.tq_avg)) - goto out; + if (router) { + router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); + if (!router_ifinfo) + goto out; + + /* if this neighbor does not offer a better TQ we won't + * consider it + */ + if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) + goto out; + } /* if the TQ is the same and the link not more symmetric we * won't consider it either */ - if (router && (neigh_node->bat_iv.tq_avg == router->bat_iv.tq_avg)) { + if (router_ifinfo && + (neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg)) { orig_node_tmp = router->orig_node; spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); if_num = router->if_incoming->if_num; @@ -1009,7 +1098,7 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, goto out; } - batadv_update_route(bat_priv, orig_node, neigh_node); + batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); goto out; unlock: @@ -1019,20 +1108,37 @@ out: batadv_neigh_node_free_ref(neigh_node); if (router) batadv_neigh_node_free_ref(router); + if (neigh_ifinfo) + batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + if (router_ifinfo) + batadv_neigh_ifinfo_free_ref(router_ifinfo); } +/** + * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet + * @orig_node: the orig node who originally emitted the ogm packet + * @orig_neigh_node: the orig node struct of the neighbor who sent the packet + * @batadv_ogm_packet: the ogm packet + * @if_incoming: interface where the packet was received + * @if_outgoing: interface for which the retransmission should be considered + * + * Returns 1 if the link can be considered bidirectional, 0 otherwise + */ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, struct batadv_orig_node *orig_neigh_node, struct batadv_ogm_packet *batadv_ogm_packet, - struct batadv_hard_iface *if_incoming) + struct batadv_hard_iface *if_incoming, + struct batadv_hard_iface *if_outgoing) { struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; + struct batadv_neigh_ifinfo *neigh_ifinfo; uint8_t total_count; uint8_t orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; int tq_asym_penalty, inv_asym_penalty, if_num, ret = 0; unsigned int combined_tq; + int tq_iface_penalty; /* find corresponding one hop neighbor */ rcu_read_lock(); @@ -1072,7 +1178,13 @@ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); if_num = if_incoming->if_num; orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; - neigh_rq_count = neigh_node->bat_iv.real_packet_count; + neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); + if (neigh_ifinfo) { + neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; + batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + } else { + neigh_rq_count = 0; + } spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); /* pay attention to not get a value bigger than 100 % */ @@ -1108,15 +1220,31 @@ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, inv_asym_penalty /= neigh_rq_max_cube; tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; - combined_tq = batadv_ogm_packet->tq * tq_own * tq_asym_penalty; - combined_tq /= BATADV_TQ_MAX_VALUE * BATADV_TQ_MAX_VALUE; + /* penalize if the OGM is forwarded on the same interface. WiFi + * interfaces and other half duplex devices suffer from throughput + * drops as they can't send and receive at the same time. + */ + tq_iface_penalty = BATADV_TQ_MAX_VALUE; + if (if_outgoing && (if_incoming == if_outgoing) && + batadv_is_wifi_netdev(if_outgoing->net_dev)) + tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, + bat_priv); + + combined_tq = batadv_ogm_packet->tq * + tq_own * + tq_asym_penalty * + tq_iface_penalty; + combined_tq /= BATADV_TQ_MAX_VALUE * + BATADV_TQ_MAX_VALUE * + BATADV_TQ_MAX_VALUE; batadv_ogm_packet->tq = combined_tq; batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, total tq: %3i\n", + "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, iface_penalty: %3i, total tq: %3i, if_incoming = %s, if_outgoing = %s\n", orig_node->orig, orig_neigh_node->orig, total_count, - neigh_rq_count, tq_own, - tq_asym_penalty, batadv_ogm_packet->tq); + neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, + batadv_ogm_packet->tq, if_incoming->net_dev->name, + if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); /* if link has the minimum required transmission quality * consider it bidirectional @@ -1136,17 +1264,21 @@ out: * @ethhdr: ethernet header of the packet * @batadv_ogm_packet: OGM packet to be considered * @if_incoming: interface on which the OGM packet was received + * @if_outgoing: interface for which the retransmission should be considered * * Returns duplicate status as enum batadv_dup_status */ static enum batadv_dup_status batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, const struct batadv_ogm_packet *batadv_ogm_packet, - const struct batadv_hard_iface *if_incoming) + const struct batadv_hard_iface *if_incoming, + struct batadv_hard_iface *if_outgoing) { struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); struct batadv_orig_node *orig_node; - struct batadv_neigh_node *tmp_neigh_node; + struct batadv_orig_ifinfo *orig_ifinfo = NULL; + struct batadv_neigh_node *neigh_node; + struct batadv_neigh_ifinfo *neigh_ifinfo; int is_dup; int32_t seq_diff; int need_update = 0; @@ -1161,27 +1293,37 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, if (!orig_node) return BATADV_NO_DUP; + orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); + if (WARN_ON(!orig_ifinfo)) { + batadv_orig_node_free_ref(orig_node); + return 0; + } + spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); - seq_diff = seqno - orig_node->last_real_seqno; + seq_diff = seqno - orig_ifinfo->last_real_seqno; /* signalize caller that the packet is to be dropped. */ if (!hlist_empty(&orig_node->neigh_list) && batadv_window_protected(bat_priv, seq_diff, - &orig_node->batman_seqno_reset)) { + &orig_ifinfo->batman_seqno_reset)) { ret = BATADV_PROTECTED; goto out; } rcu_read_lock(); - hlist_for_each_entry_rcu(tmp_neigh_node, - &orig_node->neigh_list, list) { - neigh_addr = tmp_neigh_node->addr; - is_dup = batadv_test_bit(tmp_neigh_node->bat_iv.real_bits, - orig_node->last_real_seqno, + hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { + neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, + if_outgoing); + if (!neigh_ifinfo) + continue; + + neigh_addr = neigh_node->addr; + is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, + orig_ifinfo->last_real_seqno, seqno); if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && - tmp_neigh_node->if_incoming == if_incoming) { + neigh_node->if_incoming == if_incoming) { set_mark = 1; if (is_dup) ret = BATADV_NEIGH_DUP; @@ -1192,173 +1334,78 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, } /* if the window moved, set the update flag. */ - bitmap = tmp_neigh_node->bat_iv.real_bits; + bitmap = neigh_ifinfo->bat_iv.real_bits; need_update |= batadv_bit_get_packet(bat_priv, bitmap, seq_diff, set_mark); - packet_count = bitmap_weight(tmp_neigh_node->bat_iv.real_bits, + packet_count = bitmap_weight(bitmap, BATADV_TQ_LOCAL_WINDOW_SIZE); - tmp_neigh_node->bat_iv.real_packet_count = packet_count; + neigh_ifinfo->bat_iv.real_packet_count = packet_count; + batadv_neigh_ifinfo_free_ref(neigh_ifinfo); } rcu_read_unlock(); if (need_update) { batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "updating last_seqno: old %u, new %u\n", - orig_node->last_real_seqno, seqno); - orig_node->last_real_seqno = seqno; + "%s updating last_seqno: old %u, new %u\n", + if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", + orig_ifinfo->last_real_seqno, seqno); + orig_ifinfo->last_real_seqno = seqno; } out: spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); batadv_orig_node_free_ref(orig_node); + if (orig_ifinfo) + batadv_orig_ifinfo_free_ref(orig_ifinfo); return ret; } -static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, - struct batadv_ogm_packet *batadv_ogm_packet, - const unsigned char *tt_buff, - struct batadv_hard_iface *if_incoming) + +/** + * batadv_iv_ogm_process_per_outif - process a batman iv OGM for an outgoing if + * @skb: the skb containing the OGM + * @orig_node: the (cached) orig node for the originator of this OGM + * @if_incoming: the interface where this packet was received + * @if_outgoing: the interface for which the packet should be considered + */ +static void +batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, + struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_incoming, + struct batadv_hard_iface *if_outgoing) { struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); - struct batadv_hard_iface *hard_iface; - struct batadv_orig_node *orig_neigh_node, *orig_node, *orig_node_tmp; struct batadv_neigh_node *router = NULL, *router_router = NULL; + struct batadv_orig_node *orig_neigh_node; + struct batadv_orig_ifinfo *orig_ifinfo; struct batadv_neigh_node *orig_neigh_router = NULL; - int has_directlink_flag; - int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0; - int is_bidirect; - bool is_single_hop_neigh = false; - bool is_from_best_next_hop = false; - int sameseq, similar_ttl; + struct batadv_neigh_ifinfo *router_ifinfo = NULL; + struct batadv_ogm_packet *ogm_packet; enum batadv_dup_status dup_status; - uint32_t if_incoming_seqno; + bool is_from_best_next_hop = false; + bool is_single_hop_neigh = false; + bool sameseq, similar_ttl; + struct sk_buff *skb_priv; + struct ethhdr *ethhdr; uint8_t *prev_sender; + int is_bidirect; - /* Silently drop when the batman packet is actually not a - * correct packet. - * - * This might happen if a packet is padded (e.g. Ethernet has a - * minimum frame length of 64 byte) and the aggregation interprets - * it as an additional length. - * - * TODO: A more sane solution would be to have a bit in the - * batadv_ogm_packet to detect whether the packet is the last - * packet in an aggregation. Here we expect that the padding - * is always zero (or not 0x01) + /* create a private copy of the skb, as some functions change tq value + * and/or flags. */ - if (batadv_ogm_packet->header.packet_type != BATADV_IV_OGM) + skb_priv = skb_copy(skb, GFP_ATOMIC); + if (!skb_priv) return; - /* could be changed by schedule_own_packet() */ - if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); - - if (batadv_ogm_packet->flags & BATADV_DIRECTLINK) - has_directlink_flag = 1; - else - has_directlink_flag = 0; + ethhdr = eth_hdr(skb_priv); + ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); - if (batadv_compare_eth(ethhdr->h_source, batadv_ogm_packet->orig)) + dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, + if_incoming, if_outgoing); + if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) is_single_hop_neigh = true; - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, tq %d, TTL %d, V %d, IDF %d)\n", - ethhdr->h_source, if_incoming->net_dev->name, - if_incoming->net_dev->dev_addr, batadv_ogm_packet->orig, - batadv_ogm_packet->prev_sender, - ntohl(batadv_ogm_packet->seqno), batadv_ogm_packet->tq, - batadv_ogm_packet->header.ttl, - batadv_ogm_packet->header.version, has_directlink_flag); - - rcu_read_lock(); - list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { - if (hard_iface->if_status != BATADV_IF_ACTIVE) - continue; - - if (hard_iface->soft_iface != if_incoming->soft_iface) - continue; - - if (batadv_compare_eth(ethhdr->h_source, - hard_iface->net_dev->dev_addr)) - is_my_addr = 1; - - if (batadv_compare_eth(batadv_ogm_packet->orig, - hard_iface->net_dev->dev_addr)) - is_my_orig = 1; - - if (batadv_compare_eth(batadv_ogm_packet->prev_sender, - hard_iface->net_dev->dev_addr)) - is_my_oldorig = 1; - } - rcu_read_unlock(); - - if (is_my_addr) { - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "Drop packet: received my own broadcast (sender: %pM)\n", - ethhdr->h_source); - return; - } - - if (is_my_orig) { - unsigned long *word; - int offset; - int32_t bit_pos; - int16_t if_num; - uint8_t *weight; - - orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, - ethhdr->h_source); - if (!orig_neigh_node) - return; - - /* neighbor has to indicate direct link and it has to - * come via the corresponding interface - * save packet seqno for bidirectional check - */ - if (has_directlink_flag && - batadv_compare_eth(if_incoming->net_dev->dev_addr, - batadv_ogm_packet->orig)) { - if_num = if_incoming->if_num; - offset = if_num * BATADV_NUM_WORDS; - - spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); - word = &(orig_neigh_node->bat_iv.bcast_own[offset]); - bit_pos = if_incoming_seqno - 2; - bit_pos -= ntohl(batadv_ogm_packet->seqno); - batadv_set_bit(word, bit_pos); - weight = &orig_neigh_node->bat_iv.bcast_own_sum[if_num]; - *weight = bitmap_weight(word, - BATADV_TQ_LOCAL_WINDOW_SIZE); - spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); - } - - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "Drop packet: originator packet from myself (via neighbor)\n"); - batadv_orig_node_free_ref(orig_neigh_node); - return; - } - - if (is_my_oldorig) { - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", - ethhdr->h_source); - return; - } - - if (batadv_ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", - ethhdr->h_source); - return; - } - - orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); - if (!orig_node) - return; - - dup_status = batadv_iv_ogm_update_seqnos(ethhdr, batadv_ogm_packet, - if_incoming); - if (dup_status == BATADV_PROTECTED) { batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "Drop packet: packet within seqno protection time (sender: %pM)\n", @@ -1366,27 +1413,28 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, goto out; } - if (batadv_ogm_packet->tq == 0) { + if (ogm_packet->tq == 0) { batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "Drop packet: originator packet with tq equal 0\n"); goto out; } - router = batadv_orig_node_get_router(orig_node); + router = batadv_orig_router_get(orig_node, if_outgoing); if (router) { - orig_node_tmp = router->orig_node; - router_router = batadv_orig_node_get_router(orig_node_tmp); + router_router = batadv_orig_router_get(router->orig_node, + if_outgoing); + router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); } - if ((router && router->bat_iv.tq_avg != 0) && + if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && (batadv_compare_eth(router->addr, ethhdr->h_source))) is_from_best_next_hop = true; - prev_sender = batadv_ogm_packet->prev_sender; + prev_sender = ogm_packet->prev_sender; /* avoid temporary routing loops */ if (router && router_router && (batadv_compare_eth(router->addr, prev_sender)) && - !(batadv_compare_eth(batadv_ogm_packet->orig, prev_sender)) && + !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && (batadv_compare_eth(router->addr, router_router->addr))) { batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", @@ -1394,7 +1442,8 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, goto out; } - batadv_tvlv_ogm_receive(bat_priv, batadv_ogm_packet, orig_node); + if (if_outgoing == BATADV_IF_DEFAULT) + batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); /* if sender is a direct neighbor the sender mac equals * originator mac @@ -1410,9 +1459,10 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, /* Update nc_nodes of the originator */ batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, - batadv_ogm_packet, is_single_hop_neigh); + ogm_packet, is_single_hop_neigh); - orig_neigh_router = batadv_orig_node_get_router(orig_neigh_node); + orig_neigh_router = batadv_orig_router_get(orig_neigh_node, + if_outgoing); /* drop packet if sender is not a direct neighbor and if we * don't route towards it @@ -1424,28 +1474,48 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, } is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, - batadv_ogm_packet, if_incoming); - - batadv_bonding_save_primary(orig_node, orig_neigh_node, - batadv_ogm_packet); + ogm_packet, if_incoming, + if_outgoing); /* update ranking if it is not a duplicate or has the same * seqno and similar ttl as the non-duplicate */ - sameseq = orig_node->last_real_seqno == ntohl(batadv_ogm_packet->seqno); - similar_ttl = orig_node->last_ttl - 3 <= batadv_ogm_packet->header.ttl; + orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); + if (!orig_ifinfo) + goto out_neigh; + + sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); + similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; + if (is_bidirect && ((dup_status == BATADV_NO_DUP) || - (sameseq && similar_ttl))) - batadv_iv_ogm_orig_update(bat_priv, orig_node, ethhdr, - batadv_ogm_packet, if_incoming, - tt_buff, dup_status); + (sameseq && similar_ttl))) { + batadv_iv_ogm_orig_update(bat_priv, orig_node, + orig_ifinfo, ethhdr, + ogm_packet, if_incoming, + if_outgoing, dup_status); + } + batadv_orig_ifinfo_free_ref(orig_ifinfo); + + /* only forward for specific interface, not for the default one. */ + if (if_outgoing == BATADV_IF_DEFAULT) + goto out_neigh; /* is single hop (direct) neighbor */ if (is_single_hop_neigh) { + /* OGMs from secondary interfaces should only scheduled once + * per interface where it has been received, not multiple times + */ + if ((ogm_packet->ttl <= 2) && + (if_incoming != if_outgoing)) { + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); + goto out_neigh; + } /* mark direct link on incoming interface */ - batadv_iv_ogm_forward(orig_node, ethhdr, batadv_ogm_packet, + batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, is_single_hop_neigh, - is_from_best_next_hop, if_incoming); + is_from_best_next_hop, if_incoming, + if_outgoing); batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); @@ -1467,14 +1537,16 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "Forwarding packet: rebroadcast originator packet\n"); - batadv_iv_ogm_forward(orig_node, ethhdr, batadv_ogm_packet, + batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, is_single_hop_neigh, is_from_best_next_hop, - if_incoming); + if_incoming, if_outgoing); out_neigh: if ((orig_neigh_node) && (!is_single_hop_neigh)) batadv_orig_node_free_ref(orig_neigh_node); out: + if (router_ifinfo) + batadv_neigh_ifinfo_free_ref(router_ifinfo); if (router) batadv_neigh_node_free_ref(router); if (router_router) @@ -1482,6 +1554,165 @@ out: if (orig_neigh_router) batadv_neigh_node_free_ref(orig_neigh_router); + kfree_skb(skb_priv); +} + +/** + * batadv_iv_ogm_process - process an incoming batman iv OGM + * @skb: the skb containing the OGM + * @ogm_offset: offset to the OGM which should be processed (for aggregates) + * @if_incoming: the interface where this packet was receved + */ +static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, + struct batadv_hard_iface *if_incoming) +{ + struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); + struct batadv_orig_node *orig_neigh_node, *orig_node; + struct batadv_hard_iface *hard_iface; + struct batadv_ogm_packet *ogm_packet; + uint32_t if_incoming_seqno; + bool has_directlink_flag; + struct ethhdr *ethhdr; + bool is_my_oldorig = false; + bool is_my_addr = false; + bool is_my_orig = false; + + ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); + ethhdr = eth_hdr(skb); + + /* Silently drop when the batman packet is actually not a + * correct packet. + * + * This might happen if a packet is padded (e.g. Ethernet has a + * minimum frame length of 64 byte) and the aggregation interprets + * it as an additional length. + * + * TODO: A more sane solution would be to have a bit in the + * batadv_ogm_packet to detect whether the packet is the last + * packet in an aggregation. Here we expect that the padding + * is always zero (or not 0x01) + */ + if (ogm_packet->packet_type != BATADV_IV_OGM) + return; + + /* could be changed by schedule_own_packet() */ + if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); + + if (ogm_packet->flags & BATADV_DIRECTLINK) + has_directlink_flag = true; + else + has_directlink_flag = false; + + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, tq %d, TTL %d, V %d, IDF %d)\n", + ethhdr->h_source, if_incoming->net_dev->name, + if_incoming->net_dev->dev_addr, ogm_packet->orig, + ogm_packet->prev_sender, ntohl(ogm_packet->seqno), + ogm_packet->tq, ogm_packet->ttl, + ogm_packet->version, has_directlink_flag); + + rcu_read_lock(); + list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { + if (hard_iface->if_status != BATADV_IF_ACTIVE) + continue; + + if (hard_iface->soft_iface != if_incoming->soft_iface) + continue; + + if (batadv_compare_eth(ethhdr->h_source, + hard_iface->net_dev->dev_addr)) + is_my_addr = true; + + if (batadv_compare_eth(ogm_packet->orig, + hard_iface->net_dev->dev_addr)) + is_my_orig = true; + + if (batadv_compare_eth(ogm_packet->prev_sender, + hard_iface->net_dev->dev_addr)) + is_my_oldorig = true; + } + rcu_read_unlock(); + + if (is_my_addr) { + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "Drop packet: received my own broadcast (sender: %pM)\n", + ethhdr->h_source); + return; + } + + if (is_my_orig) { + unsigned long *word; + int offset; + int32_t bit_pos; + int16_t if_num; + uint8_t *weight; + + orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, + ethhdr->h_source); + if (!orig_neigh_node) + return; + + /* neighbor has to indicate direct link and it has to + * come via the corresponding interface + * save packet seqno for bidirectional check + */ + if (has_directlink_flag && + batadv_compare_eth(if_incoming->net_dev->dev_addr, + ogm_packet->orig)) { + if_num = if_incoming->if_num; + offset = if_num * BATADV_NUM_WORDS; + + spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); + word = &(orig_neigh_node->bat_iv.bcast_own[offset]); + bit_pos = if_incoming_seqno - 2; + bit_pos -= ntohl(ogm_packet->seqno); + batadv_set_bit(word, bit_pos); + weight = &orig_neigh_node->bat_iv.bcast_own_sum[if_num]; + *weight = bitmap_weight(word, + BATADV_TQ_LOCAL_WINDOW_SIZE); + spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); + } + + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "Drop packet: originator packet from myself (via neighbor)\n"); + batadv_orig_node_free_ref(orig_neigh_node); + return; + } + + if (is_my_oldorig) { + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", + ethhdr->h_source); + return; + } + + if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", + ethhdr->h_source); + return; + } + + orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); + if (!orig_node) + return; + + batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, + if_incoming, BATADV_IF_DEFAULT); + + rcu_read_lock(); + list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { + if (hard_iface->if_status != BATADV_IF_ACTIVE) + continue; + + if (hard_iface->soft_iface != bat_priv->soft_iface) + continue; + + batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, + if_incoming, hard_iface); + } + rcu_read_unlock(); + batadv_orig_node_free_ref(orig_node); } @@ -1489,11 +1720,9 @@ static int batadv_iv_ogm_receive(struct sk_buff *skb, struct batadv_hard_iface *if_incoming) { struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); - struct batadv_ogm_packet *batadv_ogm_packet; - struct ethhdr *ethhdr; - int buff_pos = 0, packet_len; - unsigned char *tvlv_buff, *packet_buff; + struct batadv_ogm_packet *ogm_packet; uint8_t *packet_pos; + int ogm_offset; bool ret; ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); @@ -1510,24 +1739,19 @@ static int batadv_iv_ogm_receive(struct sk_buff *skb, batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, skb->len + ETH_HLEN); - packet_len = skb_headlen(skb); - ethhdr = eth_hdr(skb); - packet_buff = skb->data; - batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; + ogm_offset = 0; + ogm_packet = (struct batadv_ogm_packet *)skb->data; /* unpack the aggregated packets and process them one by one */ - while (batadv_iv_ogm_aggr_packet(buff_pos, packet_len, - batadv_ogm_packet->tvlv_len)) { - tvlv_buff = packet_buff + buff_pos + BATADV_OGM_HLEN; + while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), + ogm_packet->tvlv_len)) { + batadv_iv_ogm_process(skb, ogm_offset, if_incoming); - batadv_iv_ogm_process(ethhdr, batadv_ogm_packet, - tvlv_buff, if_incoming); + ogm_offset += BATADV_OGM_HLEN; + ogm_offset += ntohs(ogm_packet->tvlv_len); - buff_pos += BATADV_OGM_HLEN; - buff_pos += ntohs(batadv_ogm_packet->tvlv_len); - - packet_pos = packet_buff + buff_pos; - batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; + packet_pos = skb->data + ogm_offset; + ogm_packet = (struct batadv_ogm_packet *)packet_pos; } kfree_skb(skb); @@ -1535,17 +1759,49 @@ static int batadv_iv_ogm_receive(struct sk_buff *skb, } /** + * batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table + * @orig_node: the orig_node for which the neighbors are printed + * @if_outgoing: outgoing interface for these entries + * @seq: debugfs table seq_file struct + * + * Must be called while holding an rcu lock. + */ +static void +batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing, + struct seq_file *seq) +{ + struct batadv_neigh_node *neigh_node; + struct batadv_neigh_ifinfo *n_ifinfo; + + hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { + n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); + if (!n_ifinfo) + continue; + + seq_printf(seq, " %pM (%3i)", + neigh_node->addr, + n_ifinfo->bat_iv.tq_avg); + + batadv_neigh_ifinfo_free_ref(n_ifinfo); + } +} + +/** * batadv_iv_ogm_orig_print - print the originator table * @bat_priv: the bat priv with all the soft interface information * @seq: debugfs table seq_file struct + * @if_outgoing: the outgoing interface for which this should be printed */ static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, - struct seq_file *seq) + struct seq_file *seq, + struct batadv_hard_iface *if_outgoing) { - struct batadv_neigh_node *neigh_node, *neigh_node_tmp; + struct batadv_neigh_node *neigh_node; struct batadv_hashtable *hash = bat_priv->orig_hash; int last_seen_msecs, last_seen_secs; struct batadv_orig_node *orig_node; + struct batadv_neigh_ifinfo *n_ifinfo; unsigned long last_seen_jiffies; struct hlist_head *head; int batman_count = 0; @@ -1560,11 +1816,17 @@ static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, rcu_read_lock(); hlist_for_each_entry_rcu(orig_node, head, hash_entry) { - neigh_node = batadv_orig_node_get_router(orig_node); + neigh_node = batadv_orig_router_get(orig_node, + if_outgoing); if (!neigh_node) continue; - if (neigh_node->bat_iv.tq_avg == 0) + n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, + if_outgoing); + if (!n_ifinfo) + goto next; + + if (n_ifinfo->bat_iv.tq_avg == 0) goto next; last_seen_jiffies = jiffies - orig_node->last_seen; @@ -1574,22 +1836,19 @@ static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", orig_node->orig, last_seen_secs, - last_seen_msecs, neigh_node->bat_iv.tq_avg, + last_seen_msecs, n_ifinfo->bat_iv.tq_avg, neigh_node->addr, neigh_node->if_incoming->net_dev->name); - hlist_for_each_entry_rcu(neigh_node_tmp, - &orig_node->neigh_list, list) { - seq_printf(seq, " %pM (%3i)", - neigh_node_tmp->addr, - neigh_node_tmp->bat_iv.tq_avg); - } - + batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, + seq); seq_puts(seq, "\n"); batman_count++; next: batadv_neigh_node_free_ref(neigh_node); + if (n_ifinfo) + batadv_neigh_ifinfo_free_ref(n_ifinfo); } rcu_read_unlock(); } @@ -1601,37 +1860,84 @@ next: /** * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors * @neigh1: the first neighbor object of the comparison + * @if_outgoing1: outgoing interface for the first neighbor * @neigh2: the second neighbor object of the comparison + * @if_outgoing2: outgoing interface for the second neighbor * * Returns a value less, equal to or greater than 0 if the metric via neigh1 is * lower, the same as or higher than the metric via neigh2 */ static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, - struct batadv_neigh_node *neigh2) + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2) { + struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; uint8_t tq1, tq2; + int diff; + + neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); + neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); - tq1 = neigh1->bat_iv.tq_avg; - tq2 = neigh2->bat_iv.tq_avg; + if (!neigh1_ifinfo || !neigh2_ifinfo) { + diff = 0; + goto out; + } + + tq1 = neigh1_ifinfo->bat_iv.tq_avg; + tq2 = neigh2_ifinfo->bat_iv.tq_avg; + diff = tq1 - tq2; - return tq1 - tq2; +out: + if (neigh1_ifinfo) + batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); + if (neigh2_ifinfo) + batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); + + return diff; } /** * batadv_iv_ogm_neigh_is_eob - check if neigh1 is equally good or better than * neigh2 from the metric prospective * @neigh1: the first neighbor object of the comparison + * @if_outgoing: outgoing interface for the first neighbor * @neigh2: the second neighbor object of the comparison - * - * Returns true if the metric via neigh1 is equally good or better than the - * metric via neigh2, false otherwise. + * @if_outgoing2: outgoing interface for the second neighbor + + * Returns true if the metric via neigh1 is equally good or better than + * the metric via neigh2, false otherwise. */ -static bool batadv_iv_ogm_neigh_is_eob(struct batadv_neigh_node *neigh1, - struct batadv_neigh_node *neigh2) +static bool +batadv_iv_ogm_neigh_is_eob(struct batadv_neigh_node *neigh1, + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2) { - int diff = batadv_iv_ogm_neigh_cmp(neigh1, neigh2); + struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; + uint8_t tq1, tq2; + bool ret; + + neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); + neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); + + /* we can't say that the metric is better */ + if (!neigh1_ifinfo || !neigh2_ifinfo) { + ret = false; + goto out; + } + + tq1 = neigh1_ifinfo->bat_iv.tq_avg; + tq2 = neigh2_ifinfo->bat_iv.tq_avg; + ret = (tq1 - tq2) > -BATADV_TQ_SIMILARITY_THRESHOLD; - return diff > -BATADV_TQ_SIMILARITY_THRESHOLD; +out: + if (neigh1_ifinfo) + batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); + if (neigh2_ifinfo) + batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); + + return ret; } static struct batadv_algo_ops batadv_batman_iv __read_mostly = { diff --git a/net/batman-adv/bitarray.c b/net/batman-adv/bitarray.c index 973982414d5..9586750022f 100644 --- a/net/batman-adv/bitarray.c +++ b/net/batman-adv/bitarray.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2006-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2006-2014 B.A.T.M.A.N. contributors: * * Simon Wunderlich, Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" diff --git a/net/batman-adv/bitarray.h b/net/batman-adv/bitarray.h index a81b9322e38..cc2407351d3 100644 --- a/net/batman-adv/bitarray.h +++ b/net/batman-adv/bitarray.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2006-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2006-2014 B.A.T.M.A.N. contributors: * * Simon Wunderlich, Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_BITARRAY_H_ diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index 28eb5e6d0a0..a957c814072 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2011-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2011-2014 B.A.T.M.A.N. contributors: * * Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -132,7 +130,9 @@ static void batadv_claim_free_ref(struct batadv_bla_claim *claim) call_rcu(&claim->rcu, batadv_claim_free_rcu); } -/* @bat_priv: the bat priv with all the soft interface information +/** + * batadv_claim_hash_find + * @bat_priv: the bat priv with all the soft interface information * @data: search data (may be local/static data) * * looks for a claim in the hash, and returns it if found @@ -191,7 +191,7 @@ batadv_backbone_hash_find(struct batadv_priv *bat_priv, if (!hash) return NULL; - memcpy(search_entry.orig, addr, ETH_ALEN); + ether_addr_copy(search_entry.orig, addr); search_entry.vid = vid; index = batadv_choose_backbone_gw(&search_entry, hash->size); @@ -305,7 +305,7 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, uint8_t *mac, /* normal claim frame * set Ethernet SRC to the clients mac */ - memcpy(ethhdr->h_source, mac, ETH_ALEN); + ether_addr_copy(ethhdr->h_source, mac); batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_send_claim(): CLAIM %pM on vid %d\n", mac, BATADV_PRINT_VID(vid)); @@ -314,7 +314,7 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, uint8_t *mac, /* unclaim frame * set HW SRC to the clients mac */ - memcpy(hw_src, mac, ETH_ALEN); + ether_addr_copy(hw_src, mac); batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_send_claim(): UNCLAIM %pM on vid %d\n", mac, BATADV_PRINT_VID(vid)); @@ -323,7 +323,7 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, uint8_t *mac, /* announcement frame * set HW SRC to the special mac containg the crc */ - memcpy(hw_src, mac, ETH_ALEN); + ether_addr_copy(hw_src, mac); batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_send_claim(): ANNOUNCE of %pM on vid %d\n", ethhdr->h_source, BATADV_PRINT_VID(vid)); @@ -333,8 +333,8 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, uint8_t *mac, * set HW SRC and header destination to the receiving backbone * gws mac */ - memcpy(hw_src, mac, ETH_ALEN); - memcpy(ethhdr->h_dest, mac, ETH_ALEN); + ether_addr_copy(hw_src, mac); + ether_addr_copy(ethhdr->h_dest, mac); batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_send_claim(): REQUEST of %pM to %pM on vid %d\n", ethhdr->h_source, ethhdr->h_dest, @@ -395,7 +395,7 @@ batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, uint8_t *orig, entry->bat_priv = bat_priv; atomic_set(&entry->request_sent, 0); atomic_set(&entry->wait_periods, 0); - memcpy(entry->orig, orig, ETH_ALEN); + ether_addr_copy(entry->orig, orig); /* one for the hash, one for returning */ atomic_set(&entry->refcount, 2); @@ -451,7 +451,9 @@ batadv_bla_update_own_backbone_gw(struct batadv_priv *bat_priv, batadv_backbone_gw_free_ref(backbone_gw); } -/* @bat_priv: the bat priv with all the soft interface information +/** + * batadv_bla_answer_request - answer a bla request by sending own claims + * @bat_priv: the bat priv with all the soft interface information * @vid: the vid where the request came on * * Repeat all of our own claims, and finally send an ANNOUNCE frame @@ -497,7 +499,9 @@ static void batadv_bla_answer_request(struct batadv_priv *bat_priv, batadv_backbone_gw_free_ref(backbone_gw); } -/* @backbone_gw: the backbone gateway from whom we are out of sync +/** + * batadv_bla_send_request - send a request to repeat claims + * @backbone_gw: the backbone gateway from whom we are out of sync * * When the crc is wrong, ask the backbone gateway for a full table update. * After the request, it will repeat all of his own claims and finally @@ -522,7 +526,9 @@ static void batadv_bla_send_request(struct batadv_bla_backbone_gw *backbone_gw) } } -/* @bat_priv: the bat priv with all the soft interface information +/** + * batadv_bla_send_announce + * @bat_priv: the bat priv with all the soft interface information * @backbone_gw: our backbone gateway which should be announced * * This function sends an announcement. It is called from multiple @@ -557,7 +563,7 @@ static void batadv_bla_add_claim(struct batadv_priv *bat_priv, struct batadv_bla_claim search_claim; int hash_added; - memcpy(search_claim.addr, mac, ETH_ALEN); + ether_addr_copy(search_claim.addr, mac); search_claim.vid = vid; claim = batadv_claim_hash_find(bat_priv, &search_claim); @@ -567,7 +573,7 @@ static void batadv_bla_add_claim(struct batadv_priv *bat_priv, if (!claim) return; - memcpy(claim->addr, mac, ETH_ALEN); + ether_addr_copy(claim->addr, mac); claim->vid = vid; claim->lasttime = jiffies; claim->backbone_gw = backbone_gw; @@ -618,7 +624,7 @@ static void batadv_bla_del_claim(struct batadv_priv *bat_priv, { struct batadv_bla_claim search_claim, *claim; - memcpy(search_claim.addr, mac, ETH_ALEN); + ether_addr_copy(search_claim.addr, mac); search_claim.vid = vid; claim = batadv_claim_hash_find(bat_priv, &search_claim); if (!claim) @@ -794,11 +800,6 @@ static int batadv_check_claim_group(struct batadv_priv *bat_priv, bla_dst = (struct batadv_bla_claim_dst *)hw_dst; bla_dst_own = &bat_priv->bla.claim_dest; - /* check if it is a claim packet in general */ - if (memcmp(bla_dst->magic, bla_dst_own->magic, - sizeof(bla_dst->magic)) != 0) - return 0; - /* if announcement packet, use the source, * otherwise assume it is in the hw_src */ @@ -846,7 +847,9 @@ static int batadv_check_claim_group(struct batadv_priv *bat_priv, } -/* @bat_priv: the bat priv with all the soft interface information +/** + * batadv_bla_process_claim + * @bat_priv: the bat priv with all the soft interface information * @skb: the frame to be checked * * Check if this is a claim frame, and process it accordingly. @@ -858,12 +861,13 @@ static int batadv_bla_process_claim(struct batadv_priv *bat_priv, struct batadv_hard_iface *primary_if, struct sk_buff *skb) { - struct batadv_bla_claim_dst *bla_dst; + struct batadv_bla_claim_dst *bla_dst, *bla_dst_own; uint8_t *hw_src, *hw_dst; - struct vlan_ethhdr *vhdr; + struct vlan_hdr *vhdr, vhdr_buf; struct ethhdr *ethhdr; struct arphdr *arphdr; unsigned short vid; + int vlan_depth = 0; __be16 proto; int headlen; int ret; @@ -874,9 +878,24 @@ static int batadv_bla_process_claim(struct batadv_priv *bat_priv, proto = ethhdr->h_proto; headlen = ETH_HLEN; if (vid & BATADV_VLAN_HAS_TAG) { - vhdr = (struct vlan_ethhdr *)ethhdr; - proto = vhdr->h_vlan_encapsulated_proto; - headlen += VLAN_HLEN; + /* Traverse the VLAN/Ethertypes. + * + * At this point it is known that the first protocol is a VLAN + * header, so start checking at the encapsulated protocol. + * + * The depth of the VLAN headers is recorded to drop BLA claim + * frames encapsulated into multiple VLAN headers (QinQ). + */ + do { + vhdr = skb_header_pointer(skb, headlen, VLAN_HLEN, + &vhdr_buf); + if (!vhdr) + return 0; + + proto = vhdr->h_vlan_encapsulated_proto; + headlen += VLAN_HLEN; + vlan_depth++; + } while (proto == htons(ETH_P_8021Q)); } if (proto != htons(ETH_P_ARP)) @@ -906,6 +925,19 @@ static int batadv_bla_process_claim(struct batadv_priv *bat_priv, hw_src = (uint8_t *)arphdr + sizeof(struct arphdr); hw_dst = hw_src + ETH_ALEN + 4; bla_dst = (struct batadv_bla_claim_dst *)hw_dst; + bla_dst_own = &bat_priv->bla.claim_dest; + + /* check if it is a claim frame in general */ + if (memcmp(bla_dst->magic, bla_dst_own->magic, + sizeof(bla_dst->magic)) != 0) + return 0; + + /* check if there is a claim frame encapsulated deeper in (QinQ) and + * drop that, as this is not supported by BLA but should also not be + * sent via the mesh. + */ + if (vlan_depth > 1) + return 1; /* check if it is a claim frame. */ ret = batadv_check_claim_group(bat_priv, primary_if, hw_src, hw_dst, @@ -1095,8 +1127,8 @@ void batadv_bla_update_orig_address(struct batadv_priv *bat_priv, oldif->net_dev->dev_addr)) continue; - memcpy(backbone_gw->orig, - primary_if->net_dev->dev_addr, ETH_ALEN); + ether_addr_copy(backbone_gw->orig, + primary_if->net_dev->dev_addr); /* send an announce frame so others will ask for our * claims and update their tables. */ @@ -1302,7 +1334,7 @@ int batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv, entry = &bat_priv->bla.bcast_duplist[curr]; entry->crc = crc; entry->entrytime = jiffies; - memcpy(entry->orig, bcast_packet->orig, ETH_ALEN); + ether_addr_copy(entry->orig, bcast_packet->orig); bat_priv->bla.bcast_duplist_curr = curr; out: @@ -1313,7 +1345,9 @@ out: -/* @bat_priv: the bat priv with all the soft interface information +/** + * batadv_bla_is_backbone_gw_orig + * @bat_priv: the bat priv with all the soft interface information * @orig: originator mac address * @vid: VLAN identifier * @@ -1448,7 +1482,7 @@ int batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb, if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast) goto handled; - memcpy(search_claim.addr, ethhdr->h_source, ETH_ALEN); + ether_addr_copy(search_claim.addr, ethhdr->h_source); search_claim.vid = vid; claim = batadv_claim_hash_find(bat_priv, &search_claim); @@ -1537,9 +1571,6 @@ int batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb, if (!atomic_read(&bat_priv->bridge_loop_avoidance)) goto allow; - /* in VLAN case, the mac header might not be set. */ - skb_reset_mac_header(skb); - if (batadv_bla_process_claim(bat_priv, primary_if, skb)) goto handled; @@ -1550,7 +1581,7 @@ int batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb, if (is_multicast_ether_addr(ethhdr->h_dest)) goto handled; - memcpy(search_claim.addr, ethhdr->h_source, ETH_ALEN); + ether_addr_copy(search_claim.addr, ethhdr->h_source); search_claim.vid = vid; claim = batadv_claim_hash_find(bat_priv, &search_claim); diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h index da173e760e7..43c985d92c3 100644 --- a/net/batman-adv/bridge_loop_avoidance.h +++ b/net/batman-adv/bridge_loop_avoidance.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2011-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2011-2014 B.A.T.M.A.N. contributors: * * Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_BLA_H_ diff --git a/net/batman-adv/debugfs.c b/net/batman-adv/debugfs.c index 049a7a2ac5b..a12e25efaf6 100644 --- a/net/batman-adv/debugfs.c +++ b/net/batman-adv/debugfs.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2010-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2010-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -247,18 +245,35 @@ static int batadv_algorithms_open(struct inode *inode, struct file *file) static int batadv_originators_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; + return single_open(file, batadv_orig_seq_print_text, net_dev); } +/** + * batadv_originators_hardif_open - handles debugfs output for the + * originator table of an hard interface + * @inode: inode pointer to debugfs file + * @file: pointer to the seq_file + */ +static int batadv_originators_hardif_open(struct inode *inode, + struct file *file) +{ + struct net_device *net_dev = (struct net_device *)inode->i_private; + + return single_open(file, batadv_orig_hardif_seq_print_text, net_dev); +} + static int batadv_gateways_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; + return single_open(file, batadv_gw_client_seq_print_text, net_dev); } static int batadv_transtable_global_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; + return single_open(file, batadv_tt_global_seq_print_text, net_dev); } @@ -266,6 +281,7 @@ static int batadv_transtable_global_open(struct inode *inode, struct file *file) static int batadv_bla_claim_table_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; + return single_open(file, batadv_bla_claim_table_seq_print_text, net_dev); } @@ -274,6 +290,7 @@ static int batadv_bla_backbone_table_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; + return single_open(file, batadv_bla_backbone_table_seq_print_text, net_dev); } @@ -289,6 +306,7 @@ static int batadv_bla_backbone_table_open(struct inode *inode, static int batadv_dat_cache_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; + return single_open(file, batadv_dat_cache_seq_print_text, net_dev); } #endif @@ -296,6 +314,7 @@ static int batadv_dat_cache_open(struct inode *inode, struct file *file) static int batadv_transtable_local_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; + return single_open(file, batadv_tt_local_seq_print_text, net_dev); } @@ -308,6 +327,7 @@ struct batadv_debuginfo { static int batadv_nc_nodes_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; + return single_open(file, batadv_nc_nodes_seq_print_text, net_dev); } #endif @@ -322,7 +342,7 @@ struct batadv_debuginfo batadv_debuginfo_##_name = { \ .llseek = seq_lseek, \ .release = single_release, \ } \ -}; +} /* the following attributes are general and therefore they will be directly * placed in the BATADV_DEBUGFS_SUBDIR subdirectory of debugfs @@ -371,6 +391,28 @@ static struct batadv_debuginfo *batadv_mesh_debuginfos[] = { NULL, }; +#define BATADV_HARDIF_DEBUGINFO(_name, _mode, _open) \ +struct batadv_debuginfo batadv_hardif_debuginfo_##_name = { \ + .attr = { \ + .name = __stringify(_name), \ + .mode = _mode, \ + }, \ + .fops = { \ + .owner = THIS_MODULE, \ + .open = _open, \ + .read = seq_read, \ + .llseek = seq_lseek, \ + .release = single_release, \ + }, \ +} +static BATADV_HARDIF_DEBUGINFO(originators, S_IRUGO, + batadv_originators_hardif_open); + +static struct batadv_debuginfo *batadv_hardif_debuginfos[] = { + &batadv_hardif_debuginfo_originators, + NULL, +}; + void batadv_debugfs_init(void) { struct batadv_debuginfo **bat_debug; @@ -398,6 +440,7 @@ void batadv_debugfs_init(void) return; err: debugfs_remove_recursive(batadv_debugfs); + batadv_debugfs = NULL; } void batadv_debugfs_destroy(void) @@ -406,6 +449,59 @@ void batadv_debugfs_destroy(void) batadv_debugfs = NULL; } +/** + * batadv_debugfs_add_hardif - creates the base directory for a hard interface + * in debugfs. + * @hard_iface: hard interface which should be added. + */ +int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface) +{ + struct batadv_debuginfo **bat_debug; + struct dentry *file; + + if (!batadv_debugfs) + goto out; + + hard_iface->debug_dir = debugfs_create_dir(hard_iface->net_dev->name, + batadv_debugfs); + if (!hard_iface->debug_dir) + goto out; + + for (bat_debug = batadv_hardif_debuginfos; *bat_debug; ++bat_debug) { + file = debugfs_create_file(((*bat_debug)->attr).name, + S_IFREG | ((*bat_debug)->attr).mode, + hard_iface->debug_dir, + hard_iface->net_dev, + &(*bat_debug)->fops); + if (!file) + goto rem_attr; + } + + return 0; +rem_attr: + debugfs_remove_recursive(hard_iface->debug_dir); + hard_iface->debug_dir = NULL; +out: +#ifdef CONFIG_DEBUG_FS + return -ENOMEM; +#else + return 0; +#endif /* CONFIG_DEBUG_FS */ +} + +/** + * batadv_debugfs_del_hardif - delete the base directory for a hard interface + * in debugfs. + * @hard_iface: hard interface which is deleted. + */ +void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface) +{ + if (batadv_debugfs) { + debugfs_remove_recursive(hard_iface->debug_dir); + hard_iface->debug_dir = NULL; + } +} + int batadv_debugfs_add_meshif(struct net_device *dev) { struct batadv_priv *bat_priv = netdev_priv(dev); diff --git a/net/batman-adv/debugfs.h b/net/batman-adv/debugfs.h index f8c3849edff..37c4d6ddd04 100644 --- a/net/batman-adv/debugfs.h +++ b/net/batman-adv/debugfs.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2010-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2010-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_DEBUGFS_H_ @@ -26,5 +24,7 @@ void batadv_debugfs_init(void); void batadv_debugfs_destroy(void); int batadv_debugfs_add_meshif(struct net_device *dev); void batadv_debugfs_del_meshif(struct net_device *dev); +int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface); +void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface); #endif /* _NET_BATMAN_ADV_DEBUGFS_H_ */ diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c index 6c8c3934bd7..f2c066b2171 100644 --- a/net/batman-adv/distributed-arp-table.c +++ b/net/batman-adv/distributed-arp-table.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2011-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2011-2014 B.A.T.M.A.N. contributors: * * Antonio Quartulli * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include <linux/if_ether.h> @@ -141,7 +139,7 @@ static int batadv_compare_dat(const struct hlist_node *node, const void *data2) const void *data1 = container_of(node, struct batadv_dat_entry, hash_entry); - return (memcmp(data1, data2, sizeof(__be32)) == 0 ? 1 : 0); + return memcmp(data1, data2, sizeof(__be32)) == 0 ? 1 : 0; } /** @@ -279,7 +277,7 @@ static void batadv_dat_entry_add(struct batadv_priv *bat_priv, __be32 ip, /* if this entry is already known, just update it */ if (dat_entry) { if (!batadv_compare_eth(dat_entry->mac_addr, mac_addr)) - memcpy(dat_entry->mac_addr, mac_addr, ETH_ALEN); + ether_addr_copy(dat_entry->mac_addr, mac_addr); dat_entry->last_update = jiffies; batadv_dbg(BATADV_DBG_DAT, bat_priv, "Entry updated: %pI4 %pM (vid: %d)\n", @@ -294,7 +292,7 @@ static void batadv_dat_entry_add(struct batadv_priv *bat_priv, __be32 ip, dat_entry->ip = ip; dat_entry->vid = vid; - memcpy(dat_entry->mac_addr, mac_addr, ETH_ALEN); + ether_addr_copy(dat_entry->mac_addr, mac_addr); dat_entry->last_update = jiffies; atomic_set(&dat_entry->refcount, 2); @@ -349,7 +347,7 @@ static void batadv_dbg_arp(struct batadv_priv *bat_priv, struct sk_buff *skb, unicast_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; - switch (unicast_4addr_packet->u.header.packet_type) { + switch (unicast_4addr_packet->u.packet_type) { case BATADV_UNICAST: batadv_dbg(BATADV_DBG_DAT, bat_priv, "* encapsulated within a UNICAST packet\n"); @@ -374,7 +372,7 @@ static void batadv_dbg_arp(struct batadv_priv *bat_priv, struct sk_buff *skb, break; default: batadv_dbg(BATADV_DBG_DAT, bat_priv, "* type: Unknown (%u)!\n", - unicast_4addr_packet->u.header.packet_type); + unicast_4addr_packet->u.packet_type); } break; case BATADV_BCAST: @@ -387,7 +385,7 @@ static void batadv_dbg_arp(struct batadv_priv *bat_priv, struct sk_buff *skb, default: batadv_dbg(BATADV_DBG_DAT, bat_priv, "* encapsulated within an unknown packet type (0x%x)\n", - unicast_4addr_packet->u.header.packet_type); + unicast_4addr_packet->u.packet_type); } } @@ -591,11 +589,12 @@ static bool batadv_dat_send_data(struct batadv_priv *bat_priv, if (cand[i].type == BATADV_DAT_CANDIDATE_NOT_FOUND) continue; - neigh_node = batadv_orig_node_get_router(cand[i].orig_node); + neigh_node = batadv_orig_router_get(cand[i].orig_node, + BATADV_IF_DEFAULT); if (!neigh_node) goto free_orig; - tmp_skb = pskb_copy(skb, GFP_ATOMIC); + tmp_skb = pskb_copy_for_clone(skb, GFP_ATOMIC); if (!batadv_send_skb_prepare_unicast_4addr(bat_priv, tmp_skb, cand[i].orig_node, packet_subtype)) { @@ -663,6 +662,7 @@ static void batadv_dat_tvlv_container_update(struct batadv_priv *bat_priv) void batadv_dat_status_update(struct net_device *net_dev) { struct batadv_priv *bat_priv = netdev_priv(net_dev); + batadv_dat_tvlv_container_update(bat_priv); } @@ -941,8 +941,7 @@ bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, * additional DAT answer may trigger kernel warnings about * a packet coming from the wrong port. */ - if (batadv_is_my_client(bat_priv, dat_entry->mac_addr, - BATADV_NO_FLAGS)) { + if (batadv_is_my_client(bat_priv, dat_entry->mac_addr, vid)) { ret = true; goto out; } @@ -1028,6 +1027,11 @@ bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, if (!skb_new) goto out; + /* the rest of the TX path assumes that the mac_header offset pointing + * to the inner Ethernet header has been set, therefore reset it now. + */ + skb_reset_mac_header(skb_new); + if (vid & BATADV_VLAN_HAS_TAG) skb_new = vlan_insert_tag(skb_new, htons(ETH_P_8021Q), vid & VLAN_VID_MASK); @@ -1039,9 +1043,9 @@ bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, if (hdr_size == sizeof(struct batadv_unicast_4addr_packet)) err = batadv_send_skb_via_tt_4addr(bat_priv, skb_new, BATADV_P_DAT_CACHE_REPLY, - vid); + NULL, vid); else - err = batadv_send_skb_via_tt(bat_priv, skb_new, vid); + err = batadv_send_skb_via_tt(bat_priv, skb_new, NULL, vid); if (err != NET_XMIT_DROP) { batadv_inc_counter(bat_priv, BATADV_CNT_DAT_CACHED_REPLY_TX); diff --git a/net/batman-adv/distributed-arp-table.h b/net/batman-adv/distributed-arp-table.h index 60d853beb8d..d76e1d06c5b 100644 --- a/net/batman-adv/distributed-arp-table.h +++ b/net/batman-adv/distributed-arp-table.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2011-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2011-2014 B.A.T.M.A.N. contributors: * * Antonio Quartulli * @@ -12,13 +12,11 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ -#ifndef _NET_BATMAN_ADV_ARP_H_ -#define _NET_BATMAN_ADV_ARP_H_ +#ifndef _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ +#define _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ #ifdef CONFIG_BATMAN_ADV_DAT @@ -27,6 +25,9 @@ #include <linux/if_arp.h> +/** + * BATADV_DAT_ADDR_MAX - maximum address value in the DHT space + */ #define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0) void batadv_dat_status_update(struct net_device *net_dev); @@ -169,4 +170,4 @@ static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, #endif /* CONFIG_BATMAN_ADV_DAT */ -#endif /* _NET_BATMAN_ADV_ARP_H_ */ +#endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */ diff --git a/net/batman-adv/fragmentation.c b/net/batman-adv/fragmentation.c index 271d321b3a0..f14e54a0569 100644 --- a/net/batman-adv/fragmentation.c +++ b/net/batman-adv/fragmentation.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2013-2014 B.A.T.M.A.N. contributors: * * Martin Hundebøll <martin@hundeboll.net> * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -355,7 +353,7 @@ bool batadv_frag_skb_fwd(struct sk_buff *skb, batadv_add_counter(bat_priv, BATADV_CNT_FRAG_FWD_BYTES, skb->len + ETH_HLEN); - packet->header.ttl--; + packet->ttl--; batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); ret = true; @@ -420,12 +418,13 @@ bool batadv_frag_send_packet(struct sk_buff *skb, struct batadv_neigh_node *neigh_node) { struct batadv_priv *bat_priv; - struct batadv_hard_iface *primary_if; + struct batadv_hard_iface *primary_if = NULL; struct batadv_frag_packet frag_header; struct sk_buff *skb_fragment; unsigned mtu = neigh_node->if_incoming->net_dev->mtu; unsigned header_size = sizeof(frag_header); unsigned max_fragment_size, max_packet_size; + bool ret = false; /* To avoid merge and refragmentation at next-hops we never send * fragments larger than BATADV_FRAG_MAX_FRAG_SIZE @@ -444,15 +443,15 @@ bool batadv_frag_send_packet(struct sk_buff *skb, goto out_err; /* Create one header to be copied to all fragments */ - frag_header.header.packet_type = BATADV_UNICAST_FRAG; - frag_header.header.version = BATADV_COMPAT_VERSION; - frag_header.header.ttl = BATADV_TTL; + frag_header.packet_type = BATADV_UNICAST_FRAG; + frag_header.version = BATADV_COMPAT_VERSION; + frag_header.ttl = BATADV_TTL; frag_header.seqno = htons(atomic_inc_return(&bat_priv->frag_seqno)); frag_header.reserved = 0; frag_header.no = 0; frag_header.total_size = htons(skb->len); - memcpy(frag_header.orig, primary_if->net_dev->dev_addr, ETH_ALEN); - memcpy(frag_header.dest, orig_node->orig, ETH_ALEN); + ether_addr_copy(frag_header.orig, primary_if->net_dev->dev_addr); + ether_addr_copy(frag_header.dest, orig_node->orig); /* Eat and send fragments from the tail of skb */ while (skb->len > max_fragment_size) { @@ -485,7 +484,11 @@ bool batadv_frag_send_packet(struct sk_buff *skb, skb->len + ETH_HLEN); batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); - return true; + ret = true; + out_err: - return false; + if (primary_if) + batadv_hardif_free_ref(primary_if); + + return ret; } diff --git a/net/batman-adv/fragmentation.h b/net/batman-adv/fragmentation.h index ca029e2676e..5d7a0e66a22 100644 --- a/net/batman-adv/fragmentation.h +++ b/net/batman-adv/fragmentation.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2013-2014 B.A.T.M.A.N. contributors: * * Martin Hundebøll <martin@hundeboll.net> * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_FRAGMENTATION_H_ diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c index 2449afaa763..90cff585b37 100644 --- a/net/batman-adv/gateway_client.c +++ b/net/batman-adv/gateway_client.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2009-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2009-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -30,16 +28,24 @@ #include <linux/udp.h> #include <linux/if_vlan.h> -/* This is the offset of the options field in a dhcp packet starting at - * the beginning of the dhcp header +/* These are the offsets of the "hw type" and "hw address length" in the dhcp + * packet starting at the beginning of the dhcp header */ -#define BATADV_DHCP_OPTIONS_OFFSET 240 -#define BATADV_DHCP_REQUEST 3 +#define BATADV_DHCP_HTYPE_OFFSET 1 +#define BATADV_DHCP_HLEN_OFFSET 2 +/* Value of htype representing Ethernet */ +#define BATADV_DHCP_HTYPE_ETHERNET 0x01 +/* This is the offset of the "chaddr" field in the dhcp packet starting at the + * beginning of the dhcp header + */ +#define BATADV_DHCP_CHADDR_OFFSET 28 static void batadv_gw_node_free_ref(struct batadv_gw_node *gw_node) { - if (atomic_dec_and_test(&gw_node->refcount)) + if (atomic_dec_and_test(&gw_node->refcount)) { + batadv_orig_node_free_ref(gw_node->orig_node); kfree_rcu(gw_node, rcu); + } } static struct batadv_gw_node * @@ -105,7 +111,18 @@ static void batadv_gw_select(struct batadv_priv *bat_priv, spin_unlock_bh(&bat_priv->gw.list_lock); } -void batadv_gw_deselect(struct batadv_priv *bat_priv) +/** + * batadv_gw_reselect - force a gateway reselection + * @bat_priv: the bat priv with all the soft interface information + * + * Set a flag to remind the GW component to perform a new gateway reselection. + * However this function does not ensure that the current gateway is going to be + * deselected. The reselection mechanism may elect the same gateway once again. + * + * This means that invoking batadv_gw_reselect() does not guarantee a gateway + * change and therefore a uevent is not necessarily expected. + */ +void batadv_gw_reselect(struct batadv_priv *bat_priv) { atomic_set(&bat_priv->gw.reselect, 1); } @@ -114,6 +131,7 @@ static struct batadv_gw_node * batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv) { struct batadv_neigh_node *router; + struct batadv_neigh_ifinfo *router_ifinfo; struct batadv_gw_node *gw_node, *curr_gw = NULL; uint32_t max_gw_factor = 0, tmp_gw_factor = 0; uint32_t gw_divisor; @@ -130,14 +148,19 @@ batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv) continue; orig_node = gw_node->orig_node; - router = batadv_orig_node_get_router(orig_node); + router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); if (!router) continue; + router_ifinfo = batadv_neigh_ifinfo_get(router, + BATADV_IF_DEFAULT); + if (!router_ifinfo) + goto next; + if (!atomic_inc_not_zero(&gw_node->refcount)) goto next; - tq_avg = router->bat_iv.tq_avg; + tq_avg = router_ifinfo->bat_iv.tq_avg; switch (atomic_read(&bat_priv->gw_sel_class)) { case 1: /* fast connection */ @@ -182,6 +205,8 @@ batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv) next: batadv_neigh_node_free_ref(router); + if (router_ifinfo) + batadv_neigh_ifinfo_free_ref(router_ifinfo); } rcu_read_unlock(); @@ -207,6 +232,11 @@ void batadv_gw_check_client_stop(struct batadv_priv *bat_priv) if (!curr_gw) return; + /* deselect the current gateway so that next time that client mode is + * enabled a proper GW_ADD event can be sent + */ + batadv_gw_select(bat_priv, NULL); + /* if batman-adv is switching the gw client mode off and a gateway was * already selected, send a DEL uevent */ @@ -219,6 +249,7 @@ void batadv_gw_election(struct batadv_priv *bat_priv) { struct batadv_gw_node *curr_gw = NULL, *next_gw = NULL; struct batadv_neigh_node *router = NULL; + struct batadv_neigh_ifinfo *router_ifinfo = NULL; char gw_addr[18] = { '\0' }; if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_CLIENT) @@ -237,9 +268,17 @@ void batadv_gw_election(struct batadv_priv *bat_priv) if (next_gw) { sprintf(gw_addr, "%pM", next_gw->orig_node->orig); - router = batadv_orig_node_get_router(next_gw->orig_node); + router = batadv_orig_router_get(next_gw->orig_node, + BATADV_IF_DEFAULT); if (!router) { - batadv_gw_deselect(bat_priv); + batadv_gw_reselect(bat_priv); + goto out; + } + + router_ifinfo = batadv_neigh_ifinfo_get(router, + BATADV_IF_DEFAULT); + if (!router_ifinfo) { + batadv_gw_reselect(bat_priv); goto out; } } @@ -256,7 +295,8 @@ void batadv_gw_election(struct batadv_priv *bat_priv) next_gw->bandwidth_down / 10, next_gw->bandwidth_down % 10, next_gw->bandwidth_up / 10, - next_gw->bandwidth_up % 10, router->bat_iv.tq_avg); + next_gw->bandwidth_up % 10, + router_ifinfo->bat_iv.tq_avg); batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_ADD, gw_addr); } else { @@ -266,7 +306,8 @@ void batadv_gw_election(struct batadv_priv *bat_priv) next_gw->bandwidth_down / 10, next_gw->bandwidth_down % 10, next_gw->bandwidth_up / 10, - next_gw->bandwidth_up % 10, router->bat_iv.tq_avg); + next_gw->bandwidth_up % 10, + router_ifinfo->bat_iv.tq_avg); batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_CHANGE, gw_addr); } @@ -280,33 +321,47 @@ out: batadv_gw_node_free_ref(next_gw); if (router) batadv_neigh_node_free_ref(router); + if (router_ifinfo) + batadv_neigh_ifinfo_free_ref(router_ifinfo); } void batadv_gw_check_election(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node) { + struct batadv_neigh_ifinfo *router_orig_tq = NULL; + struct batadv_neigh_ifinfo *router_gw_tq = NULL; struct batadv_orig_node *curr_gw_orig; struct batadv_neigh_node *router_gw = NULL, *router_orig = NULL; uint8_t gw_tq_avg, orig_tq_avg; curr_gw_orig = batadv_gw_get_selected_orig(bat_priv); if (!curr_gw_orig) - goto deselect; + goto reselect; - router_gw = batadv_orig_node_get_router(curr_gw_orig); + router_gw = batadv_orig_router_get(curr_gw_orig, BATADV_IF_DEFAULT); if (!router_gw) - goto deselect; + goto reselect; + + router_gw_tq = batadv_neigh_ifinfo_get(router_gw, + BATADV_IF_DEFAULT); + if (!router_gw_tq) + goto reselect; /* this node already is the gateway */ if (curr_gw_orig == orig_node) goto out; - router_orig = batadv_orig_node_get_router(orig_node); + router_orig = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); if (!router_orig) goto out; - gw_tq_avg = router_gw->bat_iv.tq_avg; - orig_tq_avg = router_orig->bat_iv.tq_avg; + router_orig_tq = batadv_neigh_ifinfo_get(router_orig, + BATADV_IF_DEFAULT); + if (!router_orig_tq) + goto out; + + gw_tq_avg = router_gw_tq->bat_iv.tq_avg; + orig_tq_avg = router_orig_tq->bat_iv.tq_avg; /* the TQ value has to be better */ if (orig_tq_avg < gw_tq_avg) @@ -323,8 +378,8 @@ void batadv_gw_check_election(struct batadv_priv *bat_priv, "Restarting gateway selection: better gateway found (tq curr: %i, tq new: %i)\n", gw_tq_avg, orig_tq_avg); -deselect: - batadv_gw_deselect(bat_priv); +reselect: + batadv_gw_reselect(bat_priv); out: if (curr_gw_orig) batadv_orig_node_free_ref(curr_gw_orig); @@ -332,8 +387,10 @@ out: batadv_neigh_node_free_ref(router_gw); if (router_orig) batadv_neigh_node_free_ref(router_orig); - - return; + if (router_gw_tq) + batadv_neigh_ifinfo_free_ref(router_gw_tq); + if (router_orig_tq) + batadv_neigh_ifinfo_free_ref(router_orig_tq); } /** @@ -351,9 +408,14 @@ static void batadv_gw_node_add(struct batadv_priv *bat_priv, if (gateway->bandwidth_down == 0) return; + if (!atomic_inc_not_zero(&orig_node->refcount)) + return; + gw_node = kzalloc(sizeof(*gw_node), GFP_ATOMIC); - if (!gw_node) + if (!gw_node) { + batadv_orig_node_free_ref(orig_node); return; + } INIT_HLIST_NODE(&gw_node->list); gw_node->orig_node = orig_node; @@ -454,7 +516,7 @@ void batadv_gw_node_update(struct batadv_priv *bat_priv, */ curr_gw = batadv_gw_get_selected_gw_node(bat_priv); if (gw_node == curr_gw) - batadv_gw_deselect(bat_priv); + batadv_gw_reselect(bat_priv); } out: @@ -480,7 +542,7 @@ void batadv_gw_node_purge(struct batadv_priv *bat_priv) struct batadv_gw_node *gw_node, *curr_gw; struct hlist_node *node_tmp; unsigned long timeout = msecs_to_jiffies(2 * BATADV_PURGE_TIMEOUT); - int do_deselect = 0; + int do_reselect = 0; curr_gw = batadv_gw_get_selected_gw_node(bat_priv); @@ -494,7 +556,7 @@ void batadv_gw_node_purge(struct batadv_priv *bat_priv) continue; if (curr_gw == gw_node) - do_deselect = 1; + do_reselect = 1; hlist_del_rcu(&gw_node->list); batadv_gw_node_free_ref(gw_node); @@ -502,9 +564,9 @@ void batadv_gw_node_purge(struct batadv_priv *bat_priv) spin_unlock_bh(&bat_priv->gw.list_lock); - /* gw_deselect() needs to acquire the gw_list_lock */ - if (do_deselect) - batadv_gw_deselect(bat_priv); + /* gw_reselect() needs to acquire the gw_list_lock */ + if (do_reselect) + batadv_gw_reselect(bat_priv); if (curr_gw) batadv_gw_node_free_ref(curr_gw); @@ -517,28 +579,36 @@ static int batadv_write_buffer_text(struct batadv_priv *bat_priv, { struct batadv_gw_node *curr_gw; struct batadv_neigh_node *router; + struct batadv_neigh_ifinfo *router_ifinfo = NULL; int ret = -1; - router = batadv_orig_node_get_router(gw_node->orig_node); + router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); if (!router) goto out; + router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); + if (!router_ifinfo) + goto out; + curr_gw = batadv_gw_get_selected_gw_node(bat_priv); ret = seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n", (curr_gw == gw_node ? "=>" : " "), gw_node->orig_node->orig, - router->bat_iv.tq_avg, router->addr, + router_ifinfo->bat_iv.tq_avg, router->addr, router->if_incoming->net_dev->name, gw_node->bandwidth_down / 10, gw_node->bandwidth_down % 10, gw_node->bandwidth_up / 10, gw_node->bandwidth_up % 10); - batadv_neigh_node_free_ref(router); if (curr_gw) batadv_gw_node_free_ref(curr_gw); out: + if (router_ifinfo) + batadv_neigh_ifinfo_free_ref(router_ifinfo); + if (router) + batadv_neigh_node_free_ref(router); return ret; } @@ -582,90 +652,49 @@ out: return 0; } -/* this call might reallocate skb data */ -static bool batadv_is_type_dhcprequest(struct sk_buff *skb, int header_len) -{ - int ret = false; - unsigned char *p; - int pkt_len; - - if (skb_linearize(skb) < 0) - goto out; - - pkt_len = skb_headlen(skb); - - if (pkt_len < header_len + BATADV_DHCP_OPTIONS_OFFSET + 1) - goto out; - - p = skb->data + header_len + BATADV_DHCP_OPTIONS_OFFSET; - pkt_len -= header_len + BATADV_DHCP_OPTIONS_OFFSET + 1; - - /* Access the dhcp option lists. Each entry is made up by: - * - octet 1: option type - * - octet 2: option data len (only if type != 255 and 0) - * - octet 3: option data - */ - while (*p != 255 && !ret) { - /* p now points to the first octet: option type */ - if (*p == 53) { - /* type 53 is the message type option. - * Jump the len octet and go to the data octet - */ - if (pkt_len < 2) - goto out; - p += 2; - - /* check if the message type is what we need */ - if (*p == BATADV_DHCP_REQUEST) - ret = true; - break; - } else if (*p == 0) { - /* option type 0 (padding), just go forward */ - if (pkt_len < 1) - goto out; - pkt_len--; - p++; - } else { - /* This is any other option. So we get the length... */ - if (pkt_len < 1) - goto out; - pkt_len--; - p++; - - /* ...and then we jump over the data */ - if (pkt_len < 1 + (*p)) - goto out; - pkt_len -= 1 + (*p); - p += 1 + (*p); - } - } -out: - return ret; -} - -/* this call might reallocate skb data */ -bool batadv_gw_is_dhcp_target(struct sk_buff *skb, unsigned int *header_len) +/** + * batadv_gw_dhcp_recipient_get - check if a packet is a DHCP message + * @skb: the packet to check + * @header_len: a pointer to the batman-adv header size + * @chaddr: buffer where the client address will be stored. Valid + * only if the function returns BATADV_DHCP_TO_CLIENT + * + * Returns: + * - BATADV_DHCP_NO if the packet is not a dhcp message or if there was an error + * while parsing it + * - BATADV_DHCP_TO_SERVER if this is a message going to the DHCP server + * - BATADV_DHCP_TO_CLIENT if this is a message going to a DHCP client + * + * This function may re-allocate the data buffer of the skb passed as argument. + */ +enum batadv_dhcp_recipient +batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len, + uint8_t *chaddr) { + enum batadv_dhcp_recipient ret = BATADV_DHCP_NO; struct ethhdr *ethhdr; struct iphdr *iphdr; struct ipv6hdr *ipv6hdr; struct udphdr *udphdr; struct vlan_ethhdr *vhdr; + int chaddr_offset; __be16 proto; + uint8_t *p; /* check for ethernet header */ if (!pskb_may_pull(skb, *header_len + ETH_HLEN)) - return false; - ethhdr = (struct ethhdr *)skb->data; + return BATADV_DHCP_NO; + + ethhdr = eth_hdr(skb); proto = ethhdr->h_proto; *header_len += ETH_HLEN; /* check for initial vlan header */ if (proto == htons(ETH_P_8021Q)) { if (!pskb_may_pull(skb, *header_len + VLAN_HLEN)) - return false; + return BATADV_DHCP_NO; - vhdr = (struct vlan_ethhdr *)skb->data; + vhdr = vlan_eth_hdr(skb); proto = vhdr->h_vlan_encapsulated_proto; *header_len += VLAN_HLEN; } @@ -674,35 +703,37 @@ bool batadv_gw_is_dhcp_target(struct sk_buff *skb, unsigned int *header_len) switch (proto) { case htons(ETH_P_IP): if (!pskb_may_pull(skb, *header_len + sizeof(*iphdr))) - return false; + return BATADV_DHCP_NO; + iphdr = (struct iphdr *)(skb->data + *header_len); *header_len += iphdr->ihl * 4; /* check for udp header */ if (iphdr->protocol != IPPROTO_UDP) - return false; + return BATADV_DHCP_NO; break; case htons(ETH_P_IPV6): if (!pskb_may_pull(skb, *header_len + sizeof(*ipv6hdr))) - return false; + return BATADV_DHCP_NO; + ipv6hdr = (struct ipv6hdr *)(skb->data + *header_len); *header_len += sizeof(*ipv6hdr); /* check for udp header */ if (ipv6hdr->nexthdr != IPPROTO_UDP) - return false; + return BATADV_DHCP_NO; break; default: - return false; + return BATADV_DHCP_NO; } if (!pskb_may_pull(skb, *header_len + sizeof(*udphdr))) - return false; + return BATADV_DHCP_NO; /* skb->data might have been reallocated by pskb_may_pull() */ - ethhdr = (struct ethhdr *)skb->data; + ethhdr = eth_hdr(skb); if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) ethhdr = (struct ethhdr *)(skb->data + VLAN_HLEN); @@ -710,17 +741,40 @@ bool batadv_gw_is_dhcp_target(struct sk_buff *skb, unsigned int *header_len) *header_len += sizeof(*udphdr); /* check for bootp port */ - if ((proto == htons(ETH_P_IP)) && - (udphdr->dest != htons(67))) - return false; + switch (proto) { + case htons(ETH_P_IP): + if (udphdr->dest == htons(67)) + ret = BATADV_DHCP_TO_SERVER; + else if (udphdr->source == htons(67)) + ret = BATADV_DHCP_TO_CLIENT; + break; + case htons(ETH_P_IPV6): + if (udphdr->dest == htons(547)) + ret = BATADV_DHCP_TO_SERVER; + else if (udphdr->source == htons(547)) + ret = BATADV_DHCP_TO_CLIENT; + break; + } - if ((proto == htons(ETH_P_IPV6)) && - (udphdr->dest != htons(547))) - return false; + chaddr_offset = *header_len + BATADV_DHCP_CHADDR_OFFSET; + /* store the client address if the message is going to a client */ + if (ret == BATADV_DHCP_TO_CLIENT && + pskb_may_pull(skb, chaddr_offset + ETH_ALEN)) { + /* check if the DHCP packet carries an Ethernet DHCP */ + p = skb->data + *header_len + BATADV_DHCP_HTYPE_OFFSET; + if (*p != BATADV_DHCP_HTYPE_ETHERNET) + return BATADV_DHCP_NO; + + /* check if the DHCP packet carries a valid Ethernet address */ + p = skb->data + *header_len + BATADV_DHCP_HLEN_OFFSET; + if (*p != ETH_ALEN) + return BATADV_DHCP_NO; + + ether_addr_copy(chaddr, skb->data + chaddr_offset); + } - return true; + return ret; } - /** * batadv_gw_out_of_range - check if the dhcp request destination is the best gw * @bat_priv: the bat priv with all the soft interface information @@ -734,6 +788,7 @@ bool batadv_gw_is_dhcp_target(struct sk_buff *skb, unsigned int *header_len) * false otherwise. * * This call might reallocate skb data. + * Must be invoked only when the DHCP packet is going TO a DHCP SERVER. */ bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, struct sk_buff *skb) @@ -741,19 +796,14 @@ bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, struct batadv_neigh_node *neigh_curr = NULL, *neigh_old = NULL; struct batadv_orig_node *orig_dst_node = NULL; struct batadv_gw_node *gw_node = NULL, *curr_gw = NULL; - struct ethhdr *ethhdr; - bool ret, out_of_range = false; - unsigned int header_len = 0; + struct batadv_neigh_ifinfo *curr_ifinfo, *old_ifinfo; + struct ethhdr *ethhdr = (struct ethhdr *)skb->data; + bool out_of_range = false; uint8_t curr_tq_avg; unsigned short vid; vid = batadv_get_vid(skb, 0); - ret = batadv_gw_is_dhcp_target(skb, &header_len); - if (!ret) - goto out; - - ethhdr = (struct ethhdr *)skb->data; orig_dst_node = batadv_transtable_search(bat_priv, ethhdr->h_source, ethhdr->h_dest, vid); if (!orig_dst_node) @@ -763,10 +813,6 @@ bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, if (!gw_node->bandwidth_down == 0) goto out; - ret = batadv_is_type_dhcprequest(skb, header_len); - if (!ret) - goto out; - switch (atomic_read(&bat_priv->gw_mode)) { case BATADV_GW_MODE_SERVER: /* If we are a GW then we are our best GW. We can artificially @@ -792,7 +838,14 @@ bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, if (!neigh_curr) goto out; - curr_tq_avg = neigh_curr->bat_iv.tq_avg; + curr_ifinfo = batadv_neigh_ifinfo_get(neigh_curr, + BATADV_IF_DEFAULT); + if (!curr_ifinfo) + goto out; + + curr_tq_avg = curr_ifinfo->bat_iv.tq_avg; + batadv_neigh_ifinfo_free_ref(curr_ifinfo); + break; case BATADV_GW_MODE_OFF: default: @@ -803,8 +856,13 @@ bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, if (!neigh_old) goto out; - if (curr_tq_avg - neigh_old->bat_iv.tq_avg > BATADV_GW_THRESHOLD) + old_ifinfo = batadv_neigh_ifinfo_get(neigh_old, BATADV_IF_DEFAULT); + if (!old_ifinfo) + goto out; + + if ((curr_tq_avg - old_ifinfo->bat_iv.tq_avg) > BATADV_GW_THRESHOLD) out_of_range = true; + batadv_neigh_ifinfo_free_ref(old_ifinfo); out: if (orig_dst_node) diff --git a/net/batman-adv/gateway_client.h b/net/batman-adv/gateway_client.h index d95c2d23195..7ee53bb7d50 100644 --- a/net/batman-adv/gateway_client.h +++ b/net/batman-adv/gateway_client.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2009-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2009-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,16 +12,14 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_GATEWAY_CLIENT_H_ #define _NET_BATMAN_ADV_GATEWAY_CLIENT_H_ void batadv_gw_check_client_stop(struct batadv_priv *bat_priv); -void batadv_gw_deselect(struct batadv_priv *bat_priv); +void batadv_gw_reselect(struct batadv_priv *bat_priv); void batadv_gw_election(struct batadv_priv *bat_priv); struct batadv_orig_node * batadv_gw_get_selected_orig(struct batadv_priv *bat_priv); @@ -34,7 +32,9 @@ void batadv_gw_node_delete(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node); void batadv_gw_node_purge(struct batadv_priv *bat_priv); int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset); -bool batadv_gw_is_dhcp_target(struct sk_buff *skb, unsigned int *header_len); bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, struct sk_buff *skb); +enum batadv_dhcp_recipient +batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len, + uint8_t *chaddr); #endif /* _NET_BATMAN_ADV_GATEWAY_CLIENT_H_ */ diff --git a/net/batman-adv/gateway_common.c b/net/batman-adv/gateway_common.c index b211b0f9cb7..6f5e621f220 100644 --- a/net/batman-adv/gateway_common.c +++ b/net/batman-adv/gateway_common.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2009-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2009-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -164,7 +162,7 @@ ssize_t batadv_gw_bandwidth_set(struct net_device *net_dev, char *buff, if ((down_curr == down_new) && (up_curr == up_new)) return count; - batadv_gw_deselect(bat_priv); + batadv_gw_reselect(bat_priv); batadv_info(net_dev, "Changing gateway bandwidth from: '%u.%u/%u.%u MBit' to: '%u.%u/%u.%u MBit'\n", down_curr / 10, down_curr % 10, up_curr / 10, up_curr % 10, diff --git a/net/batman-adv/gateway_common.h b/net/batman-adv/gateway_common.h index 56384a4cd18..aa511656194 100644 --- a/net/batman-adv/gateway_common.h +++ b/net/batman-adv/gateway_common.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2009-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2009-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_GATEWAY_COMMON_H_ diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index 57c2a19dcb5..fbda6b54baf 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -25,6 +23,7 @@ #include "translation-table.h" #include "routing.h" #include "sysfs.h" +#include "debugfs.h" #include "originator.h" #include "hash.h" #include "bridge_loop_avoidance.h" @@ -84,19 +83,17 @@ static bool batadv_is_on_batman_iface(const struct net_device *net_dev) return true; /* no more parents..stop recursion */ - if (net_dev->iflink == net_dev->ifindex) + if (net_dev->iflink == 0 || net_dev->iflink == net_dev->ifindex) return false; /* recurse over the parent device */ - parent_dev = dev_get_by_index(&init_net, net_dev->iflink); + parent_dev = __dev_get_by_index(&init_net, net_dev->iflink); /* if we got a NULL parent_dev there is something broken.. */ if (WARN(!parent_dev, "Cannot find parent device")) return false; ret = batadv_is_on_batman_iface(parent_dev); - if (parent_dev) - dev_put(parent_dev); return ret; } @@ -244,7 +241,7 @@ int batadv_hardif_min_mtu(struct net_device *soft_iface) { struct batadv_priv *bat_priv = netdev_priv(soft_iface); const struct batadv_hard_iface *hard_iface; - int min_mtu = ETH_DATA_LEN; + int min_mtu = INT_MAX; rcu_read_lock(); list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { @@ -259,8 +256,6 @@ int batadv_hardif_min_mtu(struct net_device *soft_iface) } rcu_read_unlock(); - atomic_set(&bat_priv->packet_size_max, min_mtu); - if (atomic_read(&bat_priv->fragmentation) == 0) goto out; @@ -271,13 +266,21 @@ int batadv_hardif_min_mtu(struct net_device *soft_iface) min_mtu = min_t(int, min_mtu, BATADV_FRAG_MAX_FRAG_SIZE); min_mtu -= sizeof(struct batadv_frag_packet); min_mtu *= BATADV_FRAG_MAX_FRAGMENTS; - atomic_set(&bat_priv->packet_size_max, min_mtu); - - /* with fragmentation enabled we can fragment external packets easily */ - min_mtu = min_t(int, min_mtu, ETH_DATA_LEN); out: - return min_mtu - batadv_max_header_len(); + /* report to the other components the maximum amount of bytes that + * batman-adv can send over the wire (without considering the payload + * overhead). For example, this value is used by TT to compute the + * maximum local table table size + */ + atomic_set(&bat_priv->packet_size_max, min_mtu); + + /* the real soft-interface MTU is computed by removing the payload + * overhead from the maximum amount of bytes that was just computed. + * + * However batman-adv does not support MTUs bigger than ETH_DATA_LEN + */ + return min_t(int, min_mtu - batadv_max_header_len(), ETH_DATA_LEN); } /* adjusts the MTU if a new interface with a smaller MTU appeared. */ @@ -541,6 +544,7 @@ static void batadv_hardif_remove_interface_finish(struct work_struct *work) hard_iface = container_of(work, struct batadv_hard_iface, cleanup_work); + batadv_debugfs_del_hardif(hard_iface); batadv_sysfs_del_hardif(&hard_iface->hardif_obj); batadv_hardif_free_ref(hard_iface); } @@ -571,6 +575,11 @@ batadv_hardif_add_interface(struct net_device *net_dev) hard_iface->net_dev = net_dev; hard_iface->soft_iface = NULL; hard_iface->if_status = BATADV_IF_NOT_IN_USE; + + ret = batadv_debugfs_add_hardif(hard_iface); + if (ret) + goto free_sysfs; + INIT_LIST_HEAD(&hard_iface->list); INIT_WORK(&hard_iface->cleanup_work, batadv_hardif_remove_interface_finish); @@ -587,6 +596,8 @@ batadv_hardif_add_interface(struct net_device *net_dev) return hard_iface; +free_sysfs: + batadv_sysfs_del_hardif(&hard_iface->hardif_obj); free_if: kfree(hard_iface); release_dev: diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h index df4c8bd45c4..1918cd50b62 100644 --- a/net/batman-adv/hard-interface.h +++ b/net/batman-adv/hard-interface.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_ @@ -42,6 +40,7 @@ enum batadv_hard_if_cleanup { extern struct notifier_block batadv_hard_if_notifier; bool batadv_is_wifi_netdev(struct net_device *net_device); +bool batadv_is_wifi_iface(int ifindex); struct batadv_hard_iface* batadv_hardif_get_by_netdev(const struct net_device *net_dev); int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, @@ -53,6 +52,11 @@ int batadv_hardif_min_mtu(struct net_device *soft_iface); void batadv_update_min_mtu(struct net_device *soft_iface); void batadv_hardif_free_rcu(struct rcu_head *rcu); +/** + * batadv_hardif_free_ref - decrement the hard interface refcounter and + * possibly free it + * @hard_iface: the hard interface to free + */ static inline void batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface) { @@ -60,6 +64,18 @@ batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface) call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu); } +/** + * batadv_hardif_free_ref_now - decrement the hard interface refcounter and + * possibly free it (without rcu callback) + * @hard_iface: the hard interface to free + */ +static inline void +batadv_hardif_free_ref_now(struct batadv_hard_iface *hard_iface) +{ + if (atomic_dec_and_test(&hard_iface->refcount)) + batadv_hardif_free_rcu(&hard_iface->rcu); +} + static inline struct batadv_hard_iface * batadv_primary_if_get_selected(struct batadv_priv *bat_priv) { diff --git a/net/batman-adv/hash.c b/net/batman-adv/hash.c index 7198dafd3bf..63bdf7e94f1 100644 --- a/net/batman-adv/hash.c +++ b/net/batman-adv/hash.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2006-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2006-2014 B.A.T.M.A.N. contributors: * * Simon Wunderlich, Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" diff --git a/net/batman-adv/hash.h b/net/batman-adv/hash.h index 1b4da72f209..539fc126679 100644 --- a/net/batman-adv/hash.h +++ b/net/batman-adv/hash.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2006-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2006-2014 B.A.T.M.A.N. contributors: * * Simon Wunderlich, Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_HASH_H_ diff --git a/net/batman-adv/icmp_socket.c b/net/batman-adv/icmp_socket.c index 29ae4efe354..161ef8f17d2 100644 --- a/net/batman-adv/icmp_socket.c +++ b/net/batman-adv/icmp_socket.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -160,6 +158,7 @@ static ssize_t batadv_socket_write(struct file *file, const char __user *buff, struct batadv_orig_node *orig_node = NULL; struct batadv_neigh_node *neigh_node = NULL; size_t packet_len = sizeof(struct batadv_icmp_packet); + uint8_t *addr; if (len < sizeof(struct batadv_icmp_header)) { batadv_dbg(BATADV_DBG_BATMAN, bat_priv, @@ -194,7 +193,7 @@ static ssize_t batadv_socket_write(struct file *file, const char __user *buff, goto free_skb; } - if (icmp_header->header.packet_type != BATADV_ICMP) { + if (icmp_header->packet_type != BATADV_ICMP) { batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "Error - can't send packet from char device: got bogus packet type (expected: BAT_ICMP)\n"); len = -EINVAL; @@ -217,7 +216,8 @@ static ssize_t batadv_socket_write(struct file *file, const char __user *buff, if (!orig_node) goto dst_unreach; - neigh_node = batadv_orig_node_get_router(orig_node); + neigh_node = batadv_orig_router_get(orig_node, + BATADV_IF_DEFAULT); if (!neigh_node) goto dst_unreach; @@ -228,10 +228,10 @@ static ssize_t batadv_socket_write(struct file *file, const char __user *buff, goto dst_unreach; icmp_packet_rr = (struct batadv_icmp_packet_rr *)icmp_header; - if (packet_len == sizeof(*icmp_packet_rr)) - memcpy(icmp_packet_rr->rr, - neigh_node->if_incoming->net_dev->dev_addr, - ETH_ALEN); + if (packet_len == sizeof(*icmp_packet_rr)) { + addr = neigh_node->if_incoming->net_dev->dev_addr; + ether_addr_copy(icmp_packet_rr->rr[0], addr); + } break; default: @@ -243,15 +243,15 @@ static ssize_t batadv_socket_write(struct file *file, const char __user *buff, icmp_header->uid = socket_client->index; - if (icmp_header->header.version != BATADV_COMPAT_VERSION) { + if (icmp_header->version != BATADV_COMPAT_VERSION) { icmp_header->msg_type = BATADV_PARAMETER_PROBLEM; - icmp_header->header.version = BATADV_COMPAT_VERSION; + icmp_header->version = BATADV_COMPAT_VERSION; batadv_socket_add_packet(socket_client, icmp_header, packet_len); goto free_skb; } - memcpy(icmp_header->orig, primary_if->net_dev->dev_addr, ETH_ALEN); + ether_addr_copy(icmp_header->orig, primary_if->net_dev->dev_addr); batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); goto out; diff --git a/net/batman-adv/icmp_socket.h b/net/batman-adv/icmp_socket.h index 6665080dff7..0c33950aa4a 100644 --- a/net/batman-adv/icmp_socket.h +++ b/net/batman-adv/icmp_socket.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_ICMP_SOCKET_H_ diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index c51a5e568f0..d1183e88216 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include <linux/crc32c.h> @@ -36,6 +34,7 @@ #include "gateway_client.h" #include "bridge_loop_avoidance.h" #include "distributed-arp-table.h" +#include "multicast.h" #include "gateway_common.h" #include "hash.h" #include "bat_algo.h" @@ -112,6 +111,9 @@ int batadv_mesh_init(struct net_device *soft_iface) spin_lock_init(&bat_priv->tt.last_changeset_lock); spin_lock_init(&bat_priv->tt.commit_lock); spin_lock_init(&bat_priv->gw.list_lock); +#ifdef CONFIG_BATMAN_ADV_MCAST + spin_lock_init(&bat_priv->mcast.want_lists_lock); +#endif spin_lock_init(&bat_priv->tvlv.container_list_lock); spin_lock_init(&bat_priv->tvlv.handler_list_lock); spin_lock_init(&bat_priv->softif_vlan_list_lock); @@ -119,9 +121,17 @@ int batadv_mesh_init(struct net_device *soft_iface) INIT_HLIST_HEAD(&bat_priv->forw_bat_list); INIT_HLIST_HEAD(&bat_priv->forw_bcast_list); INIT_HLIST_HEAD(&bat_priv->gw.list); +#ifdef CONFIG_BATMAN_ADV_MCAST + INIT_HLIST_HEAD(&bat_priv->mcast.want_all_unsnoopables_list); + INIT_HLIST_HEAD(&bat_priv->mcast.want_all_ipv4_list); + INIT_HLIST_HEAD(&bat_priv->mcast.want_all_ipv6_list); +#endif INIT_LIST_HEAD(&bat_priv->tt.changes_list); INIT_LIST_HEAD(&bat_priv->tt.req_list); INIT_LIST_HEAD(&bat_priv->tt.roam_list); +#ifdef CONFIG_BATMAN_ADV_MCAST + INIT_HLIST_HEAD(&bat_priv->mcast.mla_list); +#endif INIT_HLIST_HEAD(&bat_priv->tvlv.container_list); INIT_HLIST_HEAD(&bat_priv->tvlv.handler_list); INIT_HLIST_HEAD(&bat_priv->softif_vlan_list); @@ -147,6 +157,7 @@ int batadv_mesh_init(struct net_device *soft_iface) goto err; batadv_gw_init(bat_priv); + batadv_mcast_init(bat_priv); atomic_set(&bat_priv->gw.reselect, 0); atomic_set(&bat_priv->mesh_state, BATADV_MESH_ACTIVE); @@ -171,6 +182,8 @@ void batadv_mesh_free(struct net_device *soft_iface) batadv_dat_free(bat_priv); batadv_bla_free(bat_priv); + batadv_mcast_free(bat_priv); + /* Free the TT and the originator tables only after having terminated * all the other depending components which may use these structures for * their purposes. @@ -277,7 +290,7 @@ int batadv_max_header_len(void) sizeof(struct batadv_coded_packet)); #endif - return header_len; + return header_len + ETH_HLEN; } /** @@ -383,17 +396,17 @@ int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev, batadv_ogm_packet = (struct batadv_ogm_packet *)skb->data; - if (batadv_ogm_packet->header.version != BATADV_COMPAT_VERSION) { + if (batadv_ogm_packet->version != BATADV_COMPAT_VERSION) { batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "Drop packet: incompatible batman version (%i)\n", - batadv_ogm_packet->header.version); + batadv_ogm_packet->version); goto err_free; } /* all receive handlers return whether they received or reused * the supplied skb. if not, we have to free the skb. */ - idx = batadv_ogm_packet->header.packet_type; + idx = batadv_ogm_packet->packet_type; ret = (*batadv_rx_handler[idx])(skb, hard_iface); if (ret == NET_RX_DROP) @@ -421,13 +434,23 @@ static void batadv_recv_handler_init(void) for (i = BATADV_UNICAST_MIN; i <= BATADV_UNICAST_MAX; i++) batadv_rx_handler[i] = batadv_recv_unhandled_unicast_packet; - /* compile time checks for struct member offsets */ - BUILD_BUG_ON(offsetof(struct batadv_unicast_4addr_packet, src) != 10); - BUILD_BUG_ON(offsetof(struct batadv_unicast_packet, dest) != 4); - BUILD_BUG_ON(offsetof(struct batadv_unicast_tvlv_packet, dst) != 4); - BUILD_BUG_ON(offsetof(struct batadv_frag_packet, dest) != 4); - BUILD_BUG_ON(offsetof(struct batadv_icmp_packet, icmph.dst) != 4); - BUILD_BUG_ON(offsetof(struct batadv_icmp_packet_rr, icmph.dst) != 4); + /* compile time checks for sizes */ + BUILD_BUG_ON(sizeof(struct batadv_bla_claim_dst) != 6); + BUILD_BUG_ON(sizeof(struct batadv_ogm_packet) != 24); + BUILD_BUG_ON(sizeof(struct batadv_icmp_header) != 20); + BUILD_BUG_ON(sizeof(struct batadv_icmp_packet) != 20); + BUILD_BUG_ON(sizeof(struct batadv_icmp_packet_rr) != 116); + BUILD_BUG_ON(sizeof(struct batadv_unicast_packet) != 10); + BUILD_BUG_ON(sizeof(struct batadv_unicast_4addr_packet) != 18); + BUILD_BUG_ON(sizeof(struct batadv_frag_packet) != 20); + BUILD_BUG_ON(sizeof(struct batadv_bcast_packet) != 14); + BUILD_BUG_ON(sizeof(struct batadv_coded_packet) != 46); + BUILD_BUG_ON(sizeof(struct batadv_unicast_tvlv_packet) != 20); + BUILD_BUG_ON(sizeof(struct batadv_tvlv_hdr) != 4); + BUILD_BUG_ON(sizeof(struct batadv_tvlv_gateway_data) != 8); + BUILD_BUG_ON(sizeof(struct batadv_tvlv_tt_vlan_data) != 8); + BUILD_BUG_ON(sizeof(struct batadv_tvlv_tt_change) != 12); + BUILD_BUG_ON(sizeof(struct batadv_tvlv_roam_adv) != 8); /* broadcast packet */ batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet; @@ -1119,14 +1142,14 @@ void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, uint8_t *src, skb_reserve(skb, ETH_HLEN); tvlv_buff = skb_put(skb, sizeof(*unicast_tvlv_packet) + tvlv_len); unicast_tvlv_packet = (struct batadv_unicast_tvlv_packet *)tvlv_buff; - unicast_tvlv_packet->header.packet_type = BATADV_UNICAST_TVLV; - unicast_tvlv_packet->header.version = BATADV_COMPAT_VERSION; - unicast_tvlv_packet->header.ttl = BATADV_TTL; + unicast_tvlv_packet->packet_type = BATADV_UNICAST_TVLV; + unicast_tvlv_packet->version = BATADV_COMPAT_VERSION; + unicast_tvlv_packet->ttl = BATADV_TTL; unicast_tvlv_packet->reserved = 0; unicast_tvlv_packet->tvlv_len = htons(tvlv_len); unicast_tvlv_packet->align = 0; - memcpy(unicast_tvlv_packet->src, src, ETH_ALEN); - memcpy(unicast_tvlv_packet->dst, dst, ETH_ALEN); + ether_addr_copy(unicast_tvlv_packet->src, src); + ether_addr_copy(unicast_tvlv_packet->dst, dst); tvlv_buff = (unsigned char *)(unicast_tvlv_packet + 1); tvlv_hdr = (struct batadv_tvlv_hdr *)tvlv_buff; @@ -1173,6 +1196,32 @@ unsigned short batadv_get_vid(struct sk_buff *skb, size_t header_len) return vid; } +/** + * batadv_vlan_ap_isola_get - return the AP isolation status for the given vlan + * @bat_priv: the bat priv with all the soft interface information + * @vid: the VLAN identifier for which the AP isolation attributed as to be + * looked up + * + * Returns true if AP isolation is on for the VLAN idenfied by vid, false + * otherwise + */ +bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid) +{ + bool ap_isolation_enabled = false; + struct batadv_softif_vlan *vlan; + + /* if the AP isolation is requested on a VLAN, then check for its + * setting in the proper VLAN private data structure + */ + vlan = batadv_softif_vlan_get(bat_priv, vid); + if (vlan) { + ap_isolation_enabled = atomic_read(&vlan->ap_isolation); + batadv_softif_vlan_free_ref(vlan); + } + + return ap_isolation_enabled; +} + static int batadv_param_set_ra(const char *val, const struct kernel_param *kp) { struct batadv_algo_ops *bat_algo_ops; diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h index f94f287b867..118b990bae2 100644 --- a/net/batman-adv/main.h +++ b/net/batman-adv/main.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_MAIN_H_ @@ -26,7 +24,7 @@ #define BATADV_DRIVER_DEVICE "batman-adv" #ifndef BATADV_SOURCE_VERSION -#define BATADV_SOURCE_VERSION "2013.5.0" +#define BATADV_SOURCE_VERSION "2014.3.0" #endif /* B.A.T.M.A.N. parameters */ @@ -72,6 +70,14 @@ #define BATADV_NULL_IFINDEX 0 /* dummy ifindex used to avoid iface checks */ +#define BATADV_NO_MARK 0 + +/* default interface for multi interface operation. The default interface is + * used for communication which originated locally (i.e. is not forwarded) + * or where special forwarding is not desired/necessary. + */ +#define BATADV_IF_DEFAULT ((struct batadv_hard_iface *)NULL) + #define BATADV_NUM_WORDS BITS_TO_LONGS(BATADV_TQ_LOCAL_WINDOW_SIZE) #define BATADV_LOG_BUF_LEN 8192 /* has to be a power of 2 */ @@ -170,6 +176,8 @@ enum batadv_uev_type { #include <linux/percpu.h> #include <linux/slab.h> #include <net/sock.h> /* struct sock */ +#include <net/addrconf.h> /* ipv6 address stuff */ +#include <linux/ip.h> #include <net/rtnetlink.h> #include <linux/jiffies.h> #include <linux/seq_file.h> @@ -266,7 +274,7 @@ static inline void batadv_dbg(int type __always_unused, */ static inline int batadv_compare_eth(const void *data1, const void *data2) { - return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); + return ether_addr_equal_unaligned(data1, data2); } /** @@ -369,5 +377,6 @@ void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, uint8_t *src, uint8_t *dst, uint8_t type, uint8_t version, void *tvlv_value, uint16_t tvlv_value_len); unsigned short batadv_get_vid(struct sk_buff *skb, size_t header_len); +bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid); #endif /* _NET_BATMAN_ADV_MAIN_H_ */ diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c new file mode 100644 index 00000000000..96b66fd30f9 --- /dev/null +++ b/net/batman-adv/multicast.c @@ -0,0 +1,748 @@ +/* Copyright (C) 2014 B.A.T.M.A.N. contributors: + * + * Linus Lüssing + * + * 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 <http://www.gnu.org/licenses/>. + */ + +#include "main.h" +#include "multicast.h" +#include "originator.h" +#include "hard-interface.h" +#include "translation-table.h" +#include "multicast.h" + +/** + * batadv_mcast_mla_softif_get - get softif multicast listeners + * @dev: the device to collect multicast addresses from + * @mcast_list: a list to put found addresses into + * + * Collect multicast addresses of the local multicast listeners + * on the given soft interface, dev, in the given mcast_list. + * + * Returns -ENOMEM on memory allocation error or the number of + * items added to the mcast_list otherwise. + */ +static int batadv_mcast_mla_softif_get(struct net_device *dev, + struct hlist_head *mcast_list) +{ + struct netdev_hw_addr *mc_list_entry; + struct batadv_hw_addr *new; + int ret = 0; + + netif_addr_lock_bh(dev); + netdev_for_each_mc_addr(mc_list_entry, dev) { + new = kmalloc(sizeof(*new), GFP_ATOMIC); + if (!new) { + ret = -ENOMEM; + break; + } + + ether_addr_copy(new->addr, mc_list_entry->addr); + hlist_add_head(&new->list, mcast_list); + ret++; + } + netif_addr_unlock_bh(dev); + + return ret; +} + +/** + * batadv_mcast_mla_is_duplicate - check whether an address is in a list + * @mcast_addr: the multicast address to check + * @mcast_list: the list with multicast addresses to search in + * + * Returns true if the given address is already in the given list. + * Otherwise returns false. + */ +static bool batadv_mcast_mla_is_duplicate(uint8_t *mcast_addr, + struct hlist_head *mcast_list) +{ + struct batadv_hw_addr *mcast_entry; + + hlist_for_each_entry(mcast_entry, mcast_list, list) + if (batadv_compare_eth(mcast_entry->addr, mcast_addr)) + return true; + + return false; +} + +/** + * batadv_mcast_mla_list_free - free a list of multicast addresses + * @mcast_list: the list to free + * + * Removes and frees all items in the given mcast_list. + */ +static void batadv_mcast_mla_list_free(struct hlist_head *mcast_list) +{ + struct batadv_hw_addr *mcast_entry; + struct hlist_node *tmp; + + hlist_for_each_entry_safe(mcast_entry, tmp, mcast_list, list) { + hlist_del(&mcast_entry->list); + kfree(mcast_entry); + } +} + +/** + * batadv_mcast_mla_tt_retract - clean up multicast listener announcements + * @bat_priv: the bat priv with all the soft interface information + * @mcast_list: a list of addresses which should _not_ be removed + * + * Retracts the announcement of any multicast listener from the + * translation table except the ones listed in the given mcast_list. + * + * If mcast_list is NULL then all are retracted. + */ +static void batadv_mcast_mla_tt_retract(struct batadv_priv *bat_priv, + struct hlist_head *mcast_list) +{ + struct batadv_hw_addr *mcast_entry; + struct hlist_node *tmp; + + hlist_for_each_entry_safe(mcast_entry, tmp, &bat_priv->mcast.mla_list, + list) { + if (mcast_list && + batadv_mcast_mla_is_duplicate(mcast_entry->addr, + mcast_list)) + continue; + + batadv_tt_local_remove(bat_priv, mcast_entry->addr, + BATADV_NO_FLAGS, + "mcast TT outdated", false); + + hlist_del(&mcast_entry->list); + kfree(mcast_entry); + } +} + +/** + * batadv_mcast_mla_tt_add - add multicast listener announcements + * @bat_priv: the bat priv with all the soft interface information + * @mcast_list: a list of addresses which are going to get added + * + * Adds multicast listener announcements from the given mcast_list to the + * translation table if they have not been added yet. + */ +static void batadv_mcast_mla_tt_add(struct batadv_priv *bat_priv, + struct hlist_head *mcast_list) +{ + struct batadv_hw_addr *mcast_entry; + struct hlist_node *tmp; + + if (!mcast_list) + return; + + hlist_for_each_entry_safe(mcast_entry, tmp, mcast_list, list) { + if (batadv_mcast_mla_is_duplicate(mcast_entry->addr, + &bat_priv->mcast.mla_list)) + continue; + + if (!batadv_tt_local_add(bat_priv->soft_iface, + mcast_entry->addr, BATADV_NO_FLAGS, + BATADV_NULL_IFINDEX, BATADV_NO_MARK)) + continue; + + hlist_del(&mcast_entry->list); + hlist_add_head(&mcast_entry->list, &bat_priv->mcast.mla_list); + } +} + +/** + * batadv_mcast_has_bridge - check whether the soft-iface is bridged + * @bat_priv: the bat priv with all the soft interface information + * + * Checks whether there is a bridge on top of our soft interface. Returns + * true if so, false otherwise. + */ +static bool batadv_mcast_has_bridge(struct batadv_priv *bat_priv) +{ + struct net_device *upper = bat_priv->soft_iface; + + rcu_read_lock(); + do { + upper = netdev_master_upper_dev_get_rcu(upper); + } while (upper && !(upper->priv_flags & IFF_EBRIDGE)); + rcu_read_unlock(); + + return upper; +} + +/** + * batadv_mcast_mla_tvlv_update - update multicast tvlv + * @bat_priv: the bat priv with all the soft interface information + * + * Updates the own multicast tvlv with our current multicast related settings, + * capabilities and inabilities. + * + * Returns true if the tvlv container is registered afterwards. Otherwise + * returns false. + */ +static bool batadv_mcast_mla_tvlv_update(struct batadv_priv *bat_priv) +{ + struct batadv_tvlv_mcast_data mcast_data; + + mcast_data.flags = BATADV_NO_FLAGS; + memset(mcast_data.reserved, 0, sizeof(mcast_data.reserved)); + + /* Avoid attaching MLAs, if there is a bridge on top of our soft + * interface, we don't support that yet (TODO) + */ + if (batadv_mcast_has_bridge(bat_priv)) { + if (bat_priv->mcast.enabled) { + batadv_tvlv_container_unregister(bat_priv, + BATADV_TVLV_MCAST, 1); + bat_priv->mcast.enabled = false; + } + + return false; + } + + if (!bat_priv->mcast.enabled || + mcast_data.flags != bat_priv->mcast.flags) { + batadv_tvlv_container_register(bat_priv, BATADV_TVLV_MCAST, 1, + &mcast_data, sizeof(mcast_data)); + bat_priv->mcast.flags = mcast_data.flags; + bat_priv->mcast.enabled = true; + } + + return true; +} + +/** + * batadv_mcast_mla_update - update the own MLAs + * @bat_priv: the bat priv with all the soft interface information + * + * Updates the own multicast listener announcements in the translation + * table as well as the own, announced multicast tvlv container. + */ +void batadv_mcast_mla_update(struct batadv_priv *bat_priv) +{ + struct net_device *soft_iface = bat_priv->soft_iface; + struct hlist_head mcast_list = HLIST_HEAD_INIT; + int ret; + + if (!batadv_mcast_mla_tvlv_update(bat_priv)) + goto update; + + ret = batadv_mcast_mla_softif_get(soft_iface, &mcast_list); + if (ret < 0) + goto out; + +update: + batadv_mcast_mla_tt_retract(bat_priv, &mcast_list); + batadv_mcast_mla_tt_add(bat_priv, &mcast_list); + +out: + batadv_mcast_mla_list_free(&mcast_list); +} + +/** + * batadv_mcast_forw_mode_check_ipv4 - check for optimized forwarding potential + * @bat_priv: the bat priv with all the soft interface information + * @skb: the IPv4 packet to check + * @is_unsnoopable: stores whether the destination is snoopable + * + * Checks whether the given IPv4 packet has the potential to be forwarded with a + * mode more optimal than classic flooding. + * + * If so then returns 0. Otherwise -EINVAL is returned or -ENOMEM in case of + * memory allocation failure. + */ +static int batadv_mcast_forw_mode_check_ipv4(struct batadv_priv *bat_priv, + struct sk_buff *skb, + bool *is_unsnoopable) +{ + struct iphdr *iphdr; + + /* We might fail due to out-of-memory -> drop it */ + if (!pskb_may_pull(skb, sizeof(struct ethhdr) + sizeof(*iphdr))) + return -ENOMEM; + + iphdr = ip_hdr(skb); + + /* TODO: Implement Multicast Router Discovery (RFC4286), + * then allow scope > link local, too + */ + if (!ipv4_is_local_multicast(iphdr->daddr)) + return -EINVAL; + + /* link-local multicast listeners behind a bridge are + * not snoopable (see RFC4541, section 2.1.2.2) + */ + *is_unsnoopable = true; + + return 0; +} + +/** + * batadv_mcast_forw_mode_check_ipv6 - check for optimized forwarding potential + * @bat_priv: the bat priv with all the soft interface information + * @skb: the IPv6 packet to check + * @is_unsnoopable: stores whether the destination is snoopable + * + * Checks whether the given IPv6 packet has the potential to be forwarded with a + * mode more optimal than classic flooding. + * + * If so then returns 0. Otherwise -EINVAL is returned or -ENOMEM if we are out + * of memory. + */ +static int batadv_mcast_forw_mode_check_ipv6(struct batadv_priv *bat_priv, + struct sk_buff *skb, + bool *is_unsnoopable) +{ + struct ipv6hdr *ip6hdr; + + /* We might fail due to out-of-memory -> drop it */ + if (!pskb_may_pull(skb, sizeof(struct ethhdr) + sizeof(*ip6hdr))) + return -ENOMEM; + + ip6hdr = ipv6_hdr(skb); + + /* TODO: Implement Multicast Router Discovery (RFC4286), + * then allow scope > link local, too + */ + if (IPV6_ADDR_MC_SCOPE(&ip6hdr->daddr) != IPV6_ADDR_SCOPE_LINKLOCAL) + return -EINVAL; + + /* link-local-all-nodes multicast listeners behind a bridge are + * not snoopable (see RFC4541, section 3, paragraph 3) + */ + if (ipv6_addr_is_ll_all_nodes(&ip6hdr->daddr)) + *is_unsnoopable = true; + + return 0; +} + +/** + * batadv_mcast_forw_mode_check - check for optimized forwarding potential + * @bat_priv: the bat priv with all the soft interface information + * @skb: the multicast frame to check + * @is_unsnoopable: stores whether the destination is snoopable + * + * Checks whether the given multicast ethernet frame has the potential to be + * forwarded with a mode more optimal than classic flooding. + * + * If so then returns 0. Otherwise -EINVAL is returned or -ENOMEM if we are out + * of memory. + */ +static int batadv_mcast_forw_mode_check(struct batadv_priv *bat_priv, + struct sk_buff *skb, + bool *is_unsnoopable) +{ + struct ethhdr *ethhdr = eth_hdr(skb); + + if (!atomic_read(&bat_priv->multicast_mode)) + return -EINVAL; + + if (atomic_read(&bat_priv->mcast.num_disabled)) + return -EINVAL; + + switch (ntohs(ethhdr->h_proto)) { + case ETH_P_IP: + return batadv_mcast_forw_mode_check_ipv4(bat_priv, skb, + is_unsnoopable); + case ETH_P_IPV6: + return batadv_mcast_forw_mode_check_ipv6(bat_priv, skb, + is_unsnoopable); + default: + return -EINVAL; + } +} + +/** + * batadv_mcast_want_all_ip_count - count nodes with unspecific mcast interest + * @bat_priv: the bat priv with all the soft interface information + * @ethhdr: ethernet header of a packet + * + * Returns the number of nodes which want all IPv4 multicast traffic if the + * given ethhdr is from an IPv4 packet or the number of nodes which want all + * IPv6 traffic if it matches an IPv6 packet. + */ +static int batadv_mcast_forw_want_all_ip_count(struct batadv_priv *bat_priv, + struct ethhdr *ethhdr) +{ + switch (ntohs(ethhdr->h_proto)) { + case ETH_P_IP: + return atomic_read(&bat_priv->mcast.num_want_all_ipv4); + case ETH_P_IPV6: + return atomic_read(&bat_priv->mcast.num_want_all_ipv6); + default: + /* we shouldn't be here... */ + return 0; + } +} + +/** + * batadv_mcast_forw_tt_node_get - get a multicast tt node + * @bat_priv: the bat priv with all the soft interface information + * @ethhdr: the ether header containing the multicast destination + * + * Returns an orig_node matching the multicast address provided by ethhdr + * via a translation table lookup. This increases the returned nodes refcount. + */ +static struct batadv_orig_node * +batadv_mcast_forw_tt_node_get(struct batadv_priv *bat_priv, + struct ethhdr *ethhdr) +{ + return batadv_transtable_search(bat_priv, ethhdr->h_source, + ethhdr->h_dest, BATADV_NO_FLAGS); +} + +/** + * batadv_mcast_want_forw_ipv4_node_get - get a node with an ipv4 flag + * @bat_priv: the bat priv with all the soft interface information + * + * Returns an orig_node which has the BATADV_MCAST_WANT_ALL_IPV4 flag set and + * increases its refcount. + */ +static struct batadv_orig_node * +batadv_mcast_forw_ipv4_node_get(struct batadv_priv *bat_priv) +{ + struct batadv_orig_node *tmp_orig_node, *orig_node = NULL; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_orig_node, + &bat_priv->mcast.want_all_ipv4_list, + mcast_want_all_ipv4_node) { + if (!atomic_inc_not_zero(&tmp_orig_node->refcount)) + continue; + + orig_node = tmp_orig_node; + break; + } + rcu_read_unlock(); + + return orig_node; +} + +/** + * batadv_mcast_want_forw_ipv6_node_get - get a node with an ipv6 flag + * @bat_priv: the bat priv with all the soft interface information + * + * Returns an orig_node which has the BATADV_MCAST_WANT_ALL_IPV6 flag set + * and increases its refcount. + */ +static struct batadv_orig_node * +batadv_mcast_forw_ipv6_node_get(struct batadv_priv *bat_priv) +{ + struct batadv_orig_node *tmp_orig_node, *orig_node = NULL; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_orig_node, + &bat_priv->mcast.want_all_ipv6_list, + mcast_want_all_ipv6_node) { + if (!atomic_inc_not_zero(&tmp_orig_node->refcount)) + continue; + + orig_node = tmp_orig_node; + break; + } + rcu_read_unlock(); + + return orig_node; +} + +/** + * batadv_mcast_want_forw_ip_node_get - get a node with an ipv4/ipv6 flag + * @bat_priv: the bat priv with all the soft interface information + * @ethhdr: an ethernet header to determine the protocol family from + * + * Returns an orig_node which has the BATADV_MCAST_WANT_ALL_IPV4 or + * BATADV_MCAST_WANT_ALL_IPV6 flag, depending on the provided ethhdr, set and + * increases its refcount. + */ +static struct batadv_orig_node * +batadv_mcast_forw_ip_node_get(struct batadv_priv *bat_priv, + struct ethhdr *ethhdr) +{ + switch (ntohs(ethhdr->h_proto)) { + case ETH_P_IP: + return batadv_mcast_forw_ipv4_node_get(bat_priv); + case ETH_P_IPV6: + return batadv_mcast_forw_ipv6_node_get(bat_priv); + default: + /* we shouldn't be here... */ + return NULL; + } +} + +/** + * batadv_mcast_want_forw_unsnoop_node_get - get a node with an unsnoopable flag + * @bat_priv: the bat priv with all the soft interface information + * + * Returns an orig_node which has the BATADV_MCAST_WANT_ALL_UNSNOOPABLES flag + * set and increases its refcount. + */ +static struct batadv_orig_node * +batadv_mcast_forw_unsnoop_node_get(struct batadv_priv *bat_priv) +{ + struct batadv_orig_node *tmp_orig_node, *orig_node = NULL; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_orig_node, + &bat_priv->mcast.want_all_unsnoopables_list, + mcast_want_all_unsnoopables_node) { + if (!atomic_inc_not_zero(&tmp_orig_node->refcount)) + continue; + + orig_node = tmp_orig_node; + break; + } + rcu_read_unlock(); + + return orig_node; +} + +/** + * batadv_mcast_forw_mode - check on how to forward a multicast packet + * @bat_priv: the bat priv with all the soft interface information + * @skb: The multicast packet to check + * @orig: an originator to be set to forward the skb to + * + * Returns the forwarding mode as enum batadv_forw_mode and in case of + * BATADV_FORW_SINGLE set the orig to the single originator the skb + * should be forwarded to. + */ +enum batadv_forw_mode +batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb, + struct batadv_orig_node **orig) +{ + int ret, tt_count, ip_count, unsnoop_count, total_count; + bool is_unsnoopable = false; + struct ethhdr *ethhdr; + + ret = batadv_mcast_forw_mode_check(bat_priv, skb, &is_unsnoopable); + if (ret == -ENOMEM) + return BATADV_FORW_NONE; + else if (ret < 0) + return BATADV_FORW_ALL; + + ethhdr = eth_hdr(skb); + + tt_count = batadv_tt_global_hash_count(bat_priv, ethhdr->h_dest, + BATADV_NO_FLAGS); + ip_count = batadv_mcast_forw_want_all_ip_count(bat_priv, ethhdr); + unsnoop_count = !is_unsnoopable ? 0 : + atomic_read(&bat_priv->mcast.num_want_all_unsnoopables); + + total_count = tt_count + ip_count + unsnoop_count; + + switch (total_count) { + case 1: + if (tt_count) + *orig = batadv_mcast_forw_tt_node_get(bat_priv, ethhdr); + else if (ip_count) + *orig = batadv_mcast_forw_ip_node_get(bat_priv, ethhdr); + else if (unsnoop_count) + *orig = batadv_mcast_forw_unsnoop_node_get(bat_priv); + + if (*orig) + return BATADV_FORW_SINGLE; + + /* fall through */ + case 0: + return BATADV_FORW_NONE; + default: + return BATADV_FORW_ALL; + } +} + +/** + * batadv_mcast_want_unsnoop_update - update unsnoop counter and list + * @bat_priv: the bat priv with all the soft interface information + * @orig: the orig_node which multicast state might have changed of + * @mcast_flags: flags indicating the new multicast state + * + * If the BATADV_MCAST_WANT_ALL_UNSNOOPABLES flag of this originator, + * orig, has toggled then this method updates counter and list accordingly. + */ +static void batadv_mcast_want_unsnoop_update(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig, + uint8_t mcast_flags) +{ + /* switched from flag unset to set */ + if (mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES && + !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES)) { + atomic_inc(&bat_priv->mcast.num_want_all_unsnoopables); + + spin_lock_bh(&bat_priv->mcast.want_lists_lock); + hlist_add_head_rcu(&orig->mcast_want_all_unsnoopables_node, + &bat_priv->mcast.want_all_unsnoopables_list); + spin_unlock_bh(&bat_priv->mcast.want_lists_lock); + /* switched from flag set to unset */ + } else if (!(mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) && + orig->mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) { + atomic_dec(&bat_priv->mcast.num_want_all_unsnoopables); + + spin_lock_bh(&bat_priv->mcast.want_lists_lock); + hlist_del_rcu(&orig->mcast_want_all_unsnoopables_node); + spin_unlock_bh(&bat_priv->mcast.want_lists_lock); + } +} + +/** + * batadv_mcast_want_ipv4_update - update want-all-ipv4 counter and list + * @bat_priv: the bat priv with all the soft interface information + * @orig: the orig_node which multicast state might have changed of + * @mcast_flags: flags indicating the new multicast state + * + * If the BATADV_MCAST_WANT_ALL_IPV4 flag of this originator, orig, has + * toggled then this method updates counter and list accordingly. + */ +static void batadv_mcast_want_ipv4_update(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig, + uint8_t mcast_flags) +{ + /* switched from flag unset to set */ + if (mcast_flags & BATADV_MCAST_WANT_ALL_IPV4 && + !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV4)) { + atomic_inc(&bat_priv->mcast.num_want_all_ipv4); + + spin_lock_bh(&bat_priv->mcast.want_lists_lock); + hlist_add_head_rcu(&orig->mcast_want_all_ipv4_node, + &bat_priv->mcast.want_all_ipv4_list); + spin_unlock_bh(&bat_priv->mcast.want_lists_lock); + /* switched from flag set to unset */ + } else if (!(mcast_flags & BATADV_MCAST_WANT_ALL_IPV4) && + orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV4) { + atomic_dec(&bat_priv->mcast.num_want_all_ipv4); + + spin_lock_bh(&bat_priv->mcast.want_lists_lock); + hlist_del_rcu(&orig->mcast_want_all_ipv4_node); + spin_unlock_bh(&bat_priv->mcast.want_lists_lock); + } +} + +/** + * batadv_mcast_want_ipv6_update - update want-all-ipv6 counter and list + * @bat_priv: the bat priv with all the soft interface information + * @orig: the orig_node which multicast state might have changed of + * @mcast_flags: flags indicating the new multicast state + * + * If the BATADV_MCAST_WANT_ALL_IPV6 flag of this originator, orig, has + * toggled then this method updates counter and list accordingly. + */ +static void batadv_mcast_want_ipv6_update(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig, + uint8_t mcast_flags) +{ + /* switched from flag unset to set */ + if (mcast_flags & BATADV_MCAST_WANT_ALL_IPV6 && + !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV6)) { + atomic_inc(&bat_priv->mcast.num_want_all_ipv6); + + spin_lock_bh(&bat_priv->mcast.want_lists_lock); + hlist_add_head_rcu(&orig->mcast_want_all_ipv6_node, + &bat_priv->mcast.want_all_ipv6_list); + spin_unlock_bh(&bat_priv->mcast.want_lists_lock); + /* switched from flag set to unset */ + } else if (!(mcast_flags & BATADV_MCAST_WANT_ALL_IPV6) && + orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV6) { + atomic_dec(&bat_priv->mcast.num_want_all_ipv6); + + spin_lock_bh(&bat_priv->mcast.want_lists_lock); + hlist_del_rcu(&orig->mcast_want_all_ipv6_node); + spin_unlock_bh(&bat_priv->mcast.want_lists_lock); + } +} + +/** + * batadv_mcast_tvlv_ogm_handler_v1 - process incoming multicast tvlv container + * @bat_priv: the bat priv with all the soft interface information + * @orig: the orig_node of the ogm + * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) + * @tvlv_value: tvlv buffer containing the multicast data + * @tvlv_value_len: tvlv buffer length + */ +static void batadv_mcast_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig, + uint8_t flags, + void *tvlv_value, + uint16_t tvlv_value_len) +{ + bool orig_mcast_enabled = !(flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND); + uint8_t mcast_flags = BATADV_NO_FLAGS; + bool orig_initialized; + + orig_initialized = orig->capa_initialized & BATADV_ORIG_CAPA_HAS_MCAST; + + /* If mcast support is turned on decrease the disabled mcast node + * counter only if we had increased it for this node before. If this + * is a completely new orig_node no need to decrease the counter. + */ + if (orig_mcast_enabled && + !(orig->capabilities & BATADV_ORIG_CAPA_HAS_MCAST)) { + if (orig_initialized) + atomic_dec(&bat_priv->mcast.num_disabled); + orig->capabilities |= BATADV_ORIG_CAPA_HAS_MCAST; + /* If mcast support is being switched off increase the disabled + * mcast node counter. + */ + } else if (!orig_mcast_enabled && + orig->capabilities & BATADV_ORIG_CAPA_HAS_MCAST) { + atomic_inc(&bat_priv->mcast.num_disabled); + orig->capabilities &= ~BATADV_ORIG_CAPA_HAS_MCAST; + } + + orig->capa_initialized |= BATADV_ORIG_CAPA_HAS_MCAST; + + if (orig_mcast_enabled && tvlv_value && + (tvlv_value_len >= sizeof(mcast_flags))) + mcast_flags = *(uint8_t *)tvlv_value; + + batadv_mcast_want_unsnoop_update(bat_priv, orig, mcast_flags); + batadv_mcast_want_ipv4_update(bat_priv, orig, mcast_flags); + batadv_mcast_want_ipv6_update(bat_priv, orig, mcast_flags); + + orig->mcast_flags = mcast_flags; +} + +/** + * batadv_mcast_init - initialize the multicast optimizations structures + * @bat_priv: the bat priv with all the soft interface information + */ +void batadv_mcast_init(struct batadv_priv *bat_priv) +{ + batadv_tvlv_handler_register(bat_priv, batadv_mcast_tvlv_ogm_handler_v1, + NULL, BATADV_TVLV_MCAST, 1, + BATADV_TVLV_HANDLER_OGM_CIFNOTFND); +} + +/** + * batadv_mcast_free - free the multicast optimizations structures + * @bat_priv: the bat priv with all the soft interface information + */ +void batadv_mcast_free(struct batadv_priv *bat_priv) +{ + batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_MCAST, 1); + batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_MCAST, 1); + + batadv_mcast_mla_tt_retract(bat_priv, NULL); +} + +/** + * batadv_mcast_purge_orig - reset originator global mcast state modifications + * @orig: the originator which is going to get purged + */ +void batadv_mcast_purge_orig(struct batadv_orig_node *orig) +{ + struct batadv_priv *bat_priv = orig->bat_priv; + + if (!(orig->capabilities & BATADV_ORIG_CAPA_HAS_MCAST)) + atomic_dec(&bat_priv->mcast.num_disabled); + + batadv_mcast_want_unsnoop_update(bat_priv, orig, BATADV_NO_FLAGS); + batadv_mcast_want_ipv4_update(bat_priv, orig, BATADV_NO_FLAGS); + batadv_mcast_want_ipv6_update(bat_priv, orig, BATADV_NO_FLAGS); +} diff --git a/net/batman-adv/multicast.h b/net/batman-adv/multicast.h new file mode 100644 index 00000000000..73b5d45819c --- /dev/null +++ b/net/batman-adv/multicast.h @@ -0,0 +1,80 @@ +/* Copyright (C) 2014 B.A.T.M.A.N. contributors: + * + * Linus Lüssing + * + * 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 <http://www.gnu.org/licenses/>. + */ + +#ifndef _NET_BATMAN_ADV_MULTICAST_H_ +#define _NET_BATMAN_ADV_MULTICAST_H_ + +/** + * batadv_forw_mode - the way a packet should be forwarded as + * @BATADV_FORW_ALL: forward the packet to all nodes (currently via classic + * flooding) + * @BATADV_FORW_SINGLE: forward the packet to a single node (currently via the + * BATMAN unicast routing protocol) + * @BATADV_FORW_NONE: don't forward, drop it + */ +enum batadv_forw_mode { + BATADV_FORW_ALL, + BATADV_FORW_SINGLE, + BATADV_FORW_NONE, +}; + +#ifdef CONFIG_BATMAN_ADV_MCAST + +void batadv_mcast_mla_update(struct batadv_priv *bat_priv); + +enum batadv_forw_mode +batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb, + struct batadv_orig_node **mcast_single_orig); + +void batadv_mcast_init(struct batadv_priv *bat_priv); + +void batadv_mcast_free(struct batadv_priv *bat_priv); + +void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node); + +#else + +static inline void batadv_mcast_mla_update(struct batadv_priv *bat_priv) +{ + return; +} + +static inline enum batadv_forw_mode +batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb, + struct batadv_orig_node **mcast_single_orig) +{ + return BATADV_FORW_ALL; +} + +static inline int batadv_mcast_init(struct batadv_priv *bat_priv) +{ + return 0; +} + +static inline void batadv_mcast_free(struct batadv_priv *bat_priv) +{ + return; +} + +static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node) +{ + return; +} + +#endif /* CONFIG_BATMAN_ADV_MCAST */ + +#endif /* _NET_BATMAN_ADV_MULTICAST_H_ */ diff --git a/net/batman-adv/network-coding.c b/net/batman-adv/network-coding.c index 351e199bc0a..8d04d174669 100644 --- a/net/batman-adv/network-coding.c +++ b/net/batman-adv/network-coding.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2012-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2012-2014 B.A.T.M.A.N. contributors: * * Martin Hundebøll, Jeppe Ledet-Pedersen * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include <linux/debugfs.h> @@ -88,6 +86,7 @@ static void batadv_nc_tvlv_container_update(struct batadv_priv *bat_priv) void batadv_nc_status_update(struct net_device *net_dev) { struct batadv_priv *bat_priv = netdev_priv(net_dev); + batadv_nc_tvlv_container_update(bat_priv); } @@ -720,9 +719,21 @@ static bool batadv_can_nc_with_orig(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, struct batadv_ogm_packet *ogm_packet) { - if (orig_node->last_real_seqno != ntohl(ogm_packet->seqno)) + struct batadv_orig_ifinfo *orig_ifinfo; + uint32_t last_real_seqno; + uint8_t last_ttl; + + orig_ifinfo = batadv_orig_ifinfo_get(orig_node, BATADV_IF_DEFAULT); + if (!orig_ifinfo) + return false; + + last_ttl = orig_ifinfo->last_ttl; + last_real_seqno = orig_ifinfo->last_real_seqno; + batadv_orig_ifinfo_free_ref(orig_ifinfo); + + if (last_real_seqno != ntohl(ogm_packet->seqno)) return false; - if (orig_node->last_ttl != ogm_packet->header.ttl + 1) + if (last_ttl != ogm_packet->ttl + 1) return false; if (!batadv_compare_eth(ogm_packet->orig, ogm_packet->prev_sender)) return false; @@ -809,7 +820,7 @@ static struct batadv_nc_node /* Initialize nc_node */ INIT_LIST_HEAD(&nc_node->list); - memcpy(nc_node->addr, orig_node->orig, ETH_ALEN); + ether_addr_copy(nc_node->addr, orig_node->orig); nc_node->orig_node = orig_neigh_node; atomic_set(&nc_node->refcount, 2); @@ -931,8 +942,8 @@ static struct batadv_nc_path *batadv_nc_get_path(struct batadv_priv *bat_priv, spin_lock_init(&nc_path->packet_list_lock); atomic_set(&nc_path->refcount, 2); nc_path->last_valid = jiffies; - memcpy(nc_path->next_hop, dst, ETH_ALEN); - memcpy(nc_path->prev_hop, src, ETH_ALEN); + ether_addr_copy(nc_path->next_hop, dst); + ether_addr_copy(nc_path->prev_hop, src); batadv_dbg(BATADV_DBG_NC, bat_priv, "Adding nc_path %pM -> %pM\n", nc_path->prev_hop, @@ -1010,6 +1021,8 @@ static bool batadv_nc_code_packets(struct batadv_priv *bat_priv, struct batadv_coded_packet *coded_packet; struct batadv_neigh_node *neigh_tmp, *router_neigh; struct batadv_neigh_node *router_coding = NULL; + struct batadv_neigh_ifinfo *router_neigh_ifinfo = NULL; + struct batadv_neigh_ifinfo *router_coding_ifinfo = NULL; uint8_t *first_source, *first_dest, *second_source, *second_dest; __be32 packet_id1, packet_id2; size_t count; @@ -1019,19 +1032,34 @@ static bool batadv_nc_code_packets(struct batadv_priv *bat_priv, int coded_size = sizeof(*coded_packet); int header_add = coded_size - unicast_size; - router_neigh = batadv_orig_node_get_router(neigh_node->orig_node); + /* TODO: do we need to consider the outgoing interface for + * coded packets? + */ + router_neigh = batadv_orig_router_get(neigh_node->orig_node, + BATADV_IF_DEFAULT); if (!router_neigh) goto out; + router_neigh_ifinfo = batadv_neigh_ifinfo_get(router_neigh, + BATADV_IF_DEFAULT); + if (!router_neigh_ifinfo) + goto out; + neigh_tmp = nc_packet->neigh_node; - router_coding = batadv_orig_node_get_router(neigh_tmp->orig_node); + router_coding = batadv_orig_router_get(neigh_tmp->orig_node, + BATADV_IF_DEFAULT); if (!router_coding) goto out; - tq_tmp = batadv_nc_random_weight_tq(router_neigh->bat_iv.tq_avg); - tq_weighted_neigh = tq_tmp; - tq_tmp = batadv_nc_random_weight_tq(router_coding->bat_iv.tq_avg); - tq_weighted_coding = tq_tmp; + router_coding_ifinfo = batadv_neigh_ifinfo_get(router_coding, + BATADV_IF_DEFAULT); + if (!router_coding_ifinfo) + goto out; + + tq_tmp = router_neigh_ifinfo->bat_iv.tq_avg; + tq_weighted_neigh = batadv_nc_random_weight_tq(tq_tmp); + tq_tmp = router_coding_ifinfo->bat_iv.tq_avg; + tq_weighted_coding = batadv_nc_random_weight_tq(tq_tmp); /* Select one destination for the MAC-header dst-field based on * weighted TQ-values. @@ -1082,22 +1110,22 @@ static bool batadv_nc_code_packets(struct batadv_priv *bat_priv, coded_packet = (struct batadv_coded_packet *)skb_dest->data; skb_reset_mac_header(skb_dest); - coded_packet->header.packet_type = BATADV_CODED; - coded_packet->header.version = BATADV_COMPAT_VERSION; - coded_packet->header.ttl = packet1->header.ttl; + coded_packet->packet_type = BATADV_CODED; + coded_packet->version = BATADV_COMPAT_VERSION; + coded_packet->ttl = packet1->ttl; /* Info about first unicast packet */ - memcpy(coded_packet->first_source, first_source, ETH_ALEN); - memcpy(coded_packet->first_orig_dest, packet1->dest, ETH_ALEN); + ether_addr_copy(coded_packet->first_source, first_source); + ether_addr_copy(coded_packet->first_orig_dest, packet1->dest); coded_packet->first_crc = packet_id1; coded_packet->first_ttvn = packet1->ttvn; /* Info about second unicast packet */ - memcpy(coded_packet->second_dest, second_dest, ETH_ALEN); - memcpy(coded_packet->second_source, second_source, ETH_ALEN); - memcpy(coded_packet->second_orig_dest, packet2->dest, ETH_ALEN); + ether_addr_copy(coded_packet->second_dest, second_dest); + ether_addr_copy(coded_packet->second_source, second_source); + ether_addr_copy(coded_packet->second_orig_dest, packet2->dest); coded_packet->second_crc = packet_id2; - coded_packet->second_ttl = packet2->header.ttl; + coded_packet->second_ttl = packet2->ttl; coded_packet->second_ttvn = packet2->ttvn; coded_packet->coded_len = htons(coding_len); @@ -1155,6 +1183,10 @@ out: batadv_neigh_node_free_ref(router_neigh); if (router_coding) batadv_neigh_node_free_ref(router_coding); + if (router_neigh_ifinfo) + batadv_neigh_ifinfo_free_ref(router_neigh_ifinfo); + if (router_coding_ifinfo) + batadv_neigh_ifinfo_free_ref(router_coding_ifinfo); return res; } @@ -1312,14 +1344,14 @@ static void batadv_nc_skb_store_before_coding(struct batadv_priv *bat_priv, struct ethhdr *ethhdr; /* Copy skb header to change the mac header */ - skb = pskb_copy(skb, GFP_ATOMIC); + skb = pskb_copy_for_clone(skb, GFP_ATOMIC); if (!skb) return; /* Set the mac header as if we actually sent the packet uncoded */ ethhdr = eth_hdr(skb); - memcpy(ethhdr->h_source, ethhdr->h_dest, ETH_ALEN); - memcpy(ethhdr->h_dest, eth_dst_new, ETH_ALEN); + ether_addr_copy(ethhdr->h_source, ethhdr->h_dest); + ether_addr_copy(ethhdr->h_dest, eth_dst_new); /* Set data pointer to MAC header to mimic packets from our tx path */ skb_push(skb, ETH_HLEN); @@ -1452,7 +1484,7 @@ bool batadv_nc_skb_forward(struct sk_buff *skb, /* We only handle unicast packets */ payload = skb_network_header(skb); packet = (struct batadv_unicast_packet *)payload; - if (packet->header.packet_type != BATADV_UNICAST) + if (packet->packet_type != BATADV_UNICAST) goto out; /* Try to find a coding opportunity and send the skb if one is found */ @@ -1505,7 +1537,7 @@ void batadv_nc_skb_store_for_decoding(struct batadv_priv *bat_priv, /* Check for supported packet type */ payload = skb_network_header(skb); packet = (struct batadv_unicast_packet *)payload; - if (packet->header.packet_type != BATADV_UNICAST) + if (packet->packet_type != BATADV_UNICAST) goto out; /* Find existing nc_path or create a new */ @@ -1605,7 +1637,7 @@ batadv_nc_skb_decode_packet(struct batadv_priv *bat_priv, struct sk_buff *skb, /* Reconstruct original mac header */ ethhdr = eth_hdr(skb); - memcpy(ethhdr, ðhdr_tmp, sizeof(*ethhdr)); + *ethhdr = ethhdr_tmp; /* Select the correct unicast header information based on the location * of our mac address in the coded_packet header @@ -1615,7 +1647,7 @@ batadv_nc_skb_decode_packet(struct batadv_priv *bat_priv, struct sk_buff *skb, * so the Ethernet address must be copied to h_dest and * pkt_type changed from PACKET_OTHERHOST to PACKET_HOST */ - memcpy(ethhdr->h_dest, coded_packet_tmp.second_dest, ETH_ALEN); + ether_addr_copy(ethhdr->h_dest, coded_packet_tmp.second_dest); skb->pkt_type = PACKET_HOST; orig_dest = coded_packet_tmp.second_orig_dest; @@ -1623,7 +1655,7 @@ batadv_nc_skb_decode_packet(struct batadv_priv *bat_priv, struct sk_buff *skb, ttvn = coded_packet_tmp.second_ttvn; } else { orig_dest = coded_packet_tmp.first_orig_dest; - ttl = coded_packet_tmp.header.ttl; + ttl = coded_packet_tmp.ttl; ttvn = coded_packet_tmp.first_ttvn; } @@ -1648,10 +1680,10 @@ batadv_nc_skb_decode_packet(struct batadv_priv *bat_priv, struct sk_buff *skb, /* Create decoded unicast packet */ unicast_packet = (struct batadv_unicast_packet *)skb->data; - unicast_packet->header.packet_type = BATADV_UNICAST; - unicast_packet->header.version = BATADV_COMPAT_VERSION; - unicast_packet->header.ttl = ttl; - memcpy(unicast_packet->dest, orig_dest, ETH_ALEN); + unicast_packet->packet_type = BATADV_UNICAST; + unicast_packet->version = BATADV_COMPAT_VERSION; + unicast_packet->ttl = ttl; + ether_addr_copy(unicast_packet->dest, orig_dest); unicast_packet->ttvn = ttvn; batadv_nc_packet_free(nc_packet); diff --git a/net/batman-adv/network-coding.h b/net/batman-adv/network-coding.h index d4fd315b526..358c0d686ab 100644 --- a/net/batman-adv/network-coding.h +++ b/net/batman-adv/network-coding.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2012-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2012-2014 B.A.T.M.A.N. contributors: * * Martin Hundebøll, Jeppe Ledet-Pedersen * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_NETWORK_CODING_H_ @@ -64,7 +62,6 @@ static inline int batadv_nc_mesh_init(struct batadv_priv *bat_priv) static inline void batadv_nc_mesh_free(struct batadv_priv *bat_priv) { - return; } static inline void @@ -74,7 +71,6 @@ batadv_nc_update_nc_node(struct batadv_priv *bat_priv, struct batadv_ogm_packet *ogm_packet, int is_single_hop_neigh) { - return; } static inline void @@ -83,17 +79,14 @@ batadv_nc_purge_orig(struct batadv_priv *bat_priv, bool (*to_purge)(struct batadv_priv *, struct batadv_nc_node *)) { - return; } static inline void batadv_nc_init_bat_priv(struct batadv_priv *bat_priv) { - return; } static inline void batadv_nc_init_orig(struct batadv_orig_node *orig_node) { - return; } static inline bool batadv_nc_skb_forward(struct sk_buff *skb, @@ -106,14 +99,12 @@ static inline void batadv_nc_skb_store_for_decoding(struct batadv_priv *bat_priv, struct sk_buff *skb) { - return; } static inline void batadv_nc_skb_store_sniffed_unicast(struct batadv_priv *bat_priv, struct sk_buff *skb) { - return; } static inline int batadv_nc_nodes_seq_print_text(struct seq_file *seq, diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index 8ab14340d10..6a484514cd3 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2009-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2009-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -29,6 +27,7 @@ #include "bridge_loop_avoidance.h" #include "network-coding.h" #include "fragmentation.h" +#include "multicast.h" /* hash class keys */ static struct lock_class_key batadv_orig_hash_lock_class_key; @@ -41,7 +40,7 @@ int batadv_compare_orig(const struct hlist_node *node, const void *data2) const void *data1 = container_of(node, struct batadv_orig_node, hash_entry); - return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); + return batadv_compare_eth(data1, data2); } /** @@ -150,20 +149,114 @@ err: return -ENOMEM; } +/** + * batadv_neigh_ifinfo_free_rcu - free the neigh_ifinfo object + * @rcu: rcu pointer of the neigh_ifinfo object + */ +static void batadv_neigh_ifinfo_free_rcu(struct rcu_head *rcu) +{ + struct batadv_neigh_ifinfo *neigh_ifinfo; + + neigh_ifinfo = container_of(rcu, struct batadv_neigh_ifinfo, rcu); + + if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT) + batadv_hardif_free_ref_now(neigh_ifinfo->if_outgoing); + + kfree(neigh_ifinfo); +} + +/** + * batadv_neigh_ifinfo_free_now - decrement the refcounter and possibly free + * the neigh_ifinfo (without rcu callback) + * @neigh_ifinfo: the neigh_ifinfo object to release + */ +static void +batadv_neigh_ifinfo_free_ref_now(struct batadv_neigh_ifinfo *neigh_ifinfo) +{ + if (atomic_dec_and_test(&neigh_ifinfo->refcount)) + batadv_neigh_ifinfo_free_rcu(&neigh_ifinfo->rcu); +} + +/** + * batadv_neigh_ifinfo_free_ref - decrement the refcounter and possibly free + * the neigh_ifinfo + * @neigh_ifinfo: the neigh_ifinfo object to release + */ +void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo) +{ + if (atomic_dec_and_test(&neigh_ifinfo->refcount)) + call_rcu(&neigh_ifinfo->rcu, batadv_neigh_ifinfo_free_rcu); +} + +/** + * batadv_neigh_node_free_rcu - free the neigh_node + * @rcu: rcu pointer of the neigh_node + */ +static void batadv_neigh_node_free_rcu(struct rcu_head *rcu) +{ + struct hlist_node *node_tmp; + struct batadv_neigh_node *neigh_node; + struct batadv_neigh_ifinfo *neigh_ifinfo; + + neigh_node = container_of(rcu, struct batadv_neigh_node, rcu); + + hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, + &neigh_node->ifinfo_list, list) { + batadv_neigh_ifinfo_free_ref_now(neigh_ifinfo); + } + batadv_hardif_free_ref_now(neigh_node->if_incoming); + + kfree(neigh_node); +} + +/** + * batadv_neigh_node_free_ref_now - decrement the neighbors refcounter + * and possibly free it (without rcu callback) + * @neigh_node: neigh neighbor to free + */ +static void +batadv_neigh_node_free_ref_now(struct batadv_neigh_node *neigh_node) +{ + if (atomic_dec_and_test(&neigh_node->refcount)) + batadv_neigh_node_free_rcu(&neigh_node->rcu); +} + +/** + * batadv_neigh_node_free_ref - decrement the neighbors refcounter + * and possibly free it + * @neigh_node: neigh neighbor to free + */ void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) { if (atomic_dec_and_test(&neigh_node->refcount)) - kfree_rcu(neigh_node, rcu); + call_rcu(&neigh_node->rcu, batadv_neigh_node_free_rcu); } -/* increases the refcounter of a found router */ +/** + * batadv_orig_node_get_router - router to the originator depending on iface + * @orig_node: the orig node for the router + * @if_outgoing: the interface where the payload packet has been received or + * the OGM should be sent to + * + * Returns the neighbor which should be router for this orig_node/iface. + * + * The object is returned with refcounter increased by 1. + */ struct batadv_neigh_node * -batadv_orig_node_get_router(struct batadv_orig_node *orig_node) +batadv_orig_router_get(struct batadv_orig_node *orig_node, + const struct batadv_hard_iface *if_outgoing) { - struct batadv_neigh_node *router; + struct batadv_orig_ifinfo *orig_ifinfo; + struct batadv_neigh_node *router = NULL; rcu_read_lock(); - router = rcu_dereference(orig_node->router); + hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) { + if (orig_ifinfo->if_outgoing != if_outgoing) + continue; + + router = rcu_dereference(orig_ifinfo->router); + break; + } if (router && !atomic_inc_not_zero(&router->refcount)) router = NULL; @@ -173,6 +266,164 @@ batadv_orig_node_get_router(struct batadv_orig_node *orig_node) } /** + * batadv_orig_ifinfo_get - find the ifinfo from an orig_node + * @orig_node: the orig node to be queried + * @if_outgoing: the interface for which the ifinfo should be acquired + * + * Returns the requested orig_ifinfo or NULL if not found. + * + * The object is returned with refcounter increased by 1. + */ +struct batadv_orig_ifinfo * +batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list, + list) { + if (tmp->if_outgoing != if_outgoing) + continue; + + if (!atomic_inc_not_zero(&tmp->refcount)) + continue; + + orig_ifinfo = tmp; + break; + } + rcu_read_unlock(); + + return orig_ifinfo; +} + +/** + * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object + * @orig_node: the orig node to be queried + * @if_outgoing: the interface for which the ifinfo should be acquired + * + * Returns NULL in case of failure or the orig_ifinfo object for the if_outgoing + * interface otherwise. The object is created and added to the list + * if it does not exist. + * + * The object is returned with refcounter increased by 1. + */ +struct batadv_orig_ifinfo * +batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_orig_ifinfo *orig_ifinfo = NULL; + unsigned long reset_time; + + spin_lock_bh(&orig_node->neigh_list_lock); + + orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); + if (orig_ifinfo) + goto out; + + orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC); + if (!orig_ifinfo) + goto out; + + if (if_outgoing != BATADV_IF_DEFAULT && + !atomic_inc_not_zero(&if_outgoing->refcount)) { + kfree(orig_ifinfo); + orig_ifinfo = NULL; + goto out; + } + + reset_time = jiffies - 1; + reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); + orig_ifinfo->batman_seqno_reset = reset_time; + orig_ifinfo->if_outgoing = if_outgoing; + INIT_HLIST_NODE(&orig_ifinfo->list); + atomic_set(&orig_ifinfo->refcount, 2); + hlist_add_head_rcu(&orig_ifinfo->list, + &orig_node->ifinfo_list); +out: + spin_unlock_bh(&orig_node->neigh_list_lock); + return orig_ifinfo; +} + +/** + * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node + * @neigh_node: the neigh node to be queried + * @if_outgoing: the interface for which the ifinfo should be acquired + * + * The object is returned with refcounter increased by 1. + * + * Returns the requested neigh_ifinfo or NULL if not found + */ +struct batadv_neigh_ifinfo * +batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, + *tmp_neigh_ifinfo; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, + list) { + if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) + continue; + + if (!atomic_inc_not_zero(&tmp_neigh_ifinfo->refcount)) + continue; + + neigh_ifinfo = tmp_neigh_ifinfo; + break; + } + rcu_read_unlock(); + + return neigh_ifinfo; +} + +/** + * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object + * @neigh_node: the neigh node to be queried + * @if_outgoing: the interface for which the ifinfo should be acquired + * + * Returns NULL in case of failure or the neigh_ifinfo object for the + * if_outgoing interface otherwise. The object is created and added to the list + * if it does not exist. + * + * The object is returned with refcounter increased by 1. + */ +struct batadv_neigh_ifinfo * +batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_neigh_ifinfo *neigh_ifinfo; + + spin_lock_bh(&neigh->ifinfo_lock); + + neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); + if (neigh_ifinfo) + goto out; + + neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); + if (!neigh_ifinfo) + goto out; + + if (if_outgoing && !atomic_inc_not_zero(&if_outgoing->refcount)) { + kfree(neigh_ifinfo); + neigh_ifinfo = NULL; + goto out; + } + + INIT_HLIST_NODE(&neigh_ifinfo->list); + atomic_set(&neigh_ifinfo->refcount, 2); + neigh_ifinfo->if_outgoing = if_outgoing; + + hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); + +out: + spin_unlock_bh(&neigh->ifinfo_lock); + + return neigh_ifinfo; +} + +/** * batadv_neigh_node_new - create and init a new neigh_node object * @hard_iface: the interface where the neighbour is connected to * @neigh_addr: the mac address of the neighbour interface @@ -193,13 +444,13 @@ batadv_neigh_node_new(struct batadv_hard_iface *hard_iface, goto out; INIT_HLIST_NODE(&neigh_node->list); + INIT_HLIST_HEAD(&neigh_node->ifinfo_list); + spin_lock_init(&neigh_node->ifinfo_lock); - memcpy(neigh_node->addr, neigh_addr, ETH_ALEN); + ether_addr_copy(neigh_node->addr, neigh_addr); neigh_node->if_incoming = hard_iface; neigh_node->orig_node = orig_node; - INIT_LIST_HEAD(&neigh_node->bonding_list); - /* extra reference for return */ atomic_set(&neigh_node->refcount, 2); @@ -207,32 +458,113 @@ out: return neigh_node; } +/** + * batadv_neigh_node_get - retrieve a neighbour from the list + * @orig_node: originator which the neighbour belongs to + * @hard_iface: the interface where this neighbour is connected to + * @addr: the address of the neighbour + * + * Looks for and possibly returns a neighbour belonging to this originator list + * which is connected through the provided hard interface. + * Returns NULL if the neighbour is not found. + */ +struct batadv_neigh_node * +batadv_neigh_node_get(const struct batadv_orig_node *orig_node, + const struct batadv_hard_iface *hard_iface, + const uint8_t *addr) +{ + struct batadv_neigh_node *tmp_neigh_node, *res = NULL; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { + if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) + continue; + + if (tmp_neigh_node->if_incoming != hard_iface) + continue; + + if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) + continue; + + res = tmp_neigh_node; + break; + } + rcu_read_unlock(); + + return res; +} + +/** + * batadv_orig_ifinfo_free_rcu - free the orig_ifinfo object + * @rcu: rcu pointer of the orig_ifinfo object + */ +static void batadv_orig_ifinfo_free_rcu(struct rcu_head *rcu) +{ + struct batadv_orig_ifinfo *orig_ifinfo; + struct batadv_neigh_node *router; + + orig_ifinfo = container_of(rcu, struct batadv_orig_ifinfo, rcu); + + if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) + batadv_hardif_free_ref_now(orig_ifinfo->if_outgoing); + + /* this is the last reference to this object */ + router = rcu_dereference_protected(orig_ifinfo->router, true); + if (router) + batadv_neigh_node_free_ref_now(router); + kfree(orig_ifinfo); +} + +/** + * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free + * the orig_ifinfo (without rcu callback) + * @orig_ifinfo: the orig_ifinfo object to release + */ +static void +batadv_orig_ifinfo_free_ref_now(struct batadv_orig_ifinfo *orig_ifinfo) +{ + if (atomic_dec_and_test(&orig_ifinfo->refcount)) + batadv_orig_ifinfo_free_rcu(&orig_ifinfo->rcu); +} + +/** + * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free + * the orig_ifinfo + * @orig_ifinfo: the orig_ifinfo object to release + */ +void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo) +{ + if (atomic_dec_and_test(&orig_ifinfo->refcount)) + call_rcu(&orig_ifinfo->rcu, batadv_orig_ifinfo_free_rcu); +} + static void batadv_orig_node_free_rcu(struct rcu_head *rcu) { struct hlist_node *node_tmp; - struct batadv_neigh_node *neigh_node, *tmp_neigh_node; + struct batadv_neigh_node *neigh_node; struct batadv_orig_node *orig_node; + struct batadv_orig_ifinfo *orig_ifinfo; orig_node = container_of(rcu, struct batadv_orig_node, rcu); spin_lock_bh(&orig_node->neigh_list_lock); - /* for all bonding members ... */ - list_for_each_entry_safe(neigh_node, tmp_neigh_node, - &orig_node->bond_list, bonding_list) { - list_del_rcu(&neigh_node->bonding_list); - batadv_neigh_node_free_ref(neigh_node); - } - /* for all neighbors towards this originator ... */ hlist_for_each_entry_safe(neigh_node, node_tmp, &orig_node->neigh_list, list) { hlist_del_rcu(&neigh_node->list); - batadv_neigh_node_free_ref(neigh_node); + batadv_neigh_node_free_ref_now(neigh_node); } + hlist_for_each_entry_safe(orig_ifinfo, node_tmp, + &orig_node->ifinfo_list, list) { + hlist_del_rcu(&orig_ifinfo->list); + batadv_orig_ifinfo_free_ref_now(orig_ifinfo); + } spin_unlock_bh(&orig_node->neigh_list_lock); + batadv_mcast_purge_orig(orig_node); + /* Free nc_nodes */ batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); @@ -327,8 +659,8 @@ struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, return NULL; INIT_HLIST_HEAD(&orig_node->neigh_list); - INIT_LIST_HEAD(&orig_node->bond_list); INIT_LIST_HEAD(&orig_node->vlan_list); + INIT_HLIST_HEAD(&orig_node->ifinfo_list); spin_lock_init(&orig_node->bcast_seqno_lock); spin_lock_init(&orig_node->neigh_list_lock); spin_lock_init(&orig_node->tt_buff_lock); @@ -340,19 +672,17 @@ struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, /* extra reference for return */ atomic_set(&orig_node->refcount, 2); - orig_node->tt_initialised = false; orig_node->bat_priv = bat_priv; - memcpy(orig_node->orig, addr, ETH_ALEN); + ether_addr_copy(orig_node->orig, addr); batadv_dat_init_orig_node_addr(orig_node); - orig_node->router = NULL; atomic_set(&orig_node->last_ttvn, 0); orig_node->tt_buff = NULL; orig_node->tt_buff_len = 0; reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); orig_node->bcast_seqno_reset = reset_time; - orig_node->batman_seqno_reset = reset_time; - - atomic_set(&orig_node->bond_candidates, 0); +#ifdef CONFIG_BATMAN_ADV_MCAST + orig_node->mcast_flags = BATADV_NO_FLAGS; +#endif /* create a vlan object for the "untagged" LAN */ vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); @@ -376,20 +706,117 @@ free_orig_node: return NULL; } +/** + * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor + * @bat_priv: the bat priv with all the soft interface information + * @neigh: orig node which is to be checked + */ +static void +batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, + struct batadv_neigh_node *neigh) +{ + struct batadv_neigh_ifinfo *neigh_ifinfo; + struct batadv_hard_iface *if_outgoing; + struct hlist_node *node_tmp; + + spin_lock_bh(&neigh->ifinfo_lock); + + /* for all ifinfo objects for this neighinator */ + hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, + &neigh->ifinfo_list, list) { + if_outgoing = neigh_ifinfo->if_outgoing; + + /* always keep the default interface */ + if (if_outgoing == BATADV_IF_DEFAULT) + continue; + + /* don't purge if the interface is not (going) down */ + if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && + (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && + (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) + continue; + + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", + neigh->addr, if_outgoing->net_dev->name); + + hlist_del_rcu(&neigh_ifinfo->list); + batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + } + + spin_unlock_bh(&neigh->ifinfo_lock); +} + +/** + * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: orig node which is to be checked + * + * Returns true if any ifinfo entry was purged, false otherwise. + */ +static bool +batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig_node) +{ + struct batadv_orig_ifinfo *orig_ifinfo; + struct batadv_hard_iface *if_outgoing; + struct hlist_node *node_tmp; + bool ifinfo_purged = false; + + spin_lock_bh(&orig_node->neigh_list_lock); + + /* for all ifinfo objects for this originator */ + hlist_for_each_entry_safe(orig_ifinfo, node_tmp, + &orig_node->ifinfo_list, list) { + if_outgoing = orig_ifinfo->if_outgoing; + + /* always keep the default interface */ + if (if_outgoing == BATADV_IF_DEFAULT) + continue; + + /* don't purge if the interface is not (going) down */ + if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && + (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && + (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) + continue; + + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "router/ifinfo purge: originator %pM, iface: %s\n", + orig_node->orig, if_outgoing->net_dev->name); + + ifinfo_purged = true; + + hlist_del_rcu(&orig_ifinfo->list); + batadv_orig_ifinfo_free_ref(orig_ifinfo); + if (orig_node->last_bonding_candidate == orig_ifinfo) { + orig_node->last_bonding_candidate = NULL; + batadv_orig_ifinfo_free_ref(orig_ifinfo); + } + } + + spin_unlock_bh(&orig_node->neigh_list_lock); + + return ifinfo_purged; +} + + +/** + * batadv_purge_orig_neighbors - purges neighbors from originator + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: orig node which is to be checked + * + * Returns true if any neighbor was purged, false otherwise + */ static bool batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, - struct batadv_orig_node *orig_node, - struct batadv_neigh_node **best_neigh) + struct batadv_orig_node *orig_node) { - struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; struct hlist_node *node_tmp; struct batadv_neigh_node *neigh_node; bool neigh_purged = false; unsigned long last_seen; struct batadv_hard_iface *if_incoming; - *best_neigh = NULL; - spin_lock_bh(&orig_node->neigh_list_lock); /* for all neighbors towards this originator ... */ @@ -418,15 +845,12 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, neigh_purged = true; hlist_del_rcu(&neigh_node->list); - batadv_bonding_candidate_del(orig_node, neigh_node); batadv_neigh_node_free_ref(neigh_node); } else { - /* store the best_neighbour if this is the first - * iteration or if a better neighbor has been found + /* only necessary if not the whole neighbor is to be + * deleted, but some interface has been removed. */ - if (!*best_neigh || - bao->bat_neigh_cmp(neigh_node, *best_neigh) > 0) - *best_neigh = neigh_node; + batadv_purge_neigh_ifinfo(bat_priv, neigh_node); } } @@ -434,10 +858,57 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, return neigh_purged; } +/** + * batadv_find_best_neighbor - finds the best neighbor after purging + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: orig node which is to be checked + * @if_outgoing: the interface for which the metric should be compared + * + * Returns the current best neighbor, with refcount increased. + */ +static struct batadv_neigh_node * +batadv_find_best_neighbor(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_neigh_node *best = NULL, *neigh; + struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; + + rcu_read_lock(); + hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { + if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, + best, if_outgoing) <= 0)) + continue; + + if (!atomic_inc_not_zero(&neigh->refcount)) + continue; + + if (best) + batadv_neigh_node_free_ref(best); + + best = neigh; + } + rcu_read_unlock(); + + return best; +} + +/** + * batadv_purge_orig_node - purges obsolete information from an orig_node + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: orig node which is to be checked + * + * This function checks if the orig_node or substructures of it have become + * obsolete, and purges this information if that's the case. + * + * Returns true if the orig_node is to be removed, false otherwise. + */ static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node) { struct batadv_neigh_node *best_neigh_node; + struct batadv_hard_iface *hard_iface; + bool changed_ifinfo, changed_neigh; if (batadv_has_timed_out(orig_node->last_seen, 2 * BATADV_PURGE_TIMEOUT)) { @@ -446,12 +917,39 @@ static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, orig_node->orig, jiffies_to_msecs(orig_node->last_seen)); return true; - } else { - if (batadv_purge_orig_neighbors(bat_priv, orig_node, - &best_neigh_node)) - batadv_update_route(bat_priv, orig_node, - best_neigh_node); } + changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); + changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); + + if (!changed_ifinfo && !changed_neigh) + return false; + + /* first for NULL ... */ + best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, + BATADV_IF_DEFAULT); + batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, + best_neigh_node); + if (best_neigh_node) + batadv_neigh_node_free_ref(best_neigh_node); + + /* ... then for all other interfaces. */ + rcu_read_lock(); + list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { + if (hard_iface->if_status != BATADV_IF_ACTIVE) + continue; + + if (hard_iface->soft_iface != bat_priv->soft_iface) + continue; + + best_neigh_node = batadv_find_best_neighbor(bat_priv, + orig_node, + hard_iface); + batadv_update_route(bat_priv, orig_node, hard_iface, + best_neigh_node); + if (best_neigh_node) + batadv_neigh_node_free_ref(best_neigh_node); + } + rcu_read_unlock(); return false; } @@ -534,11 +1032,58 @@ int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) return 0; } - bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq); + bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, + BATADV_IF_DEFAULT); return 0; } +/** + * batadv_orig_hardif_seq_print_text - writes originator infos for a specific + * outgoing interface + * @seq: debugfs table seq_file struct + * @offset: not used + * + * Returns 0 + */ +int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) +{ + struct net_device *net_dev = (struct net_device *)seq->private; + struct batadv_hard_iface *hard_iface; + struct batadv_priv *bat_priv; + + hard_iface = batadv_hardif_get_by_netdev(net_dev); + + if (!hard_iface || !hard_iface->soft_iface) { + seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); + goto out; + } + + bat_priv = netdev_priv(hard_iface->soft_iface); + if (!bat_priv->bat_algo_ops->bat_orig_print) { + seq_puts(seq, + "No printing function for this routing protocol\n"); + goto out; + } + + if (hard_iface->if_status != BATADV_IF_ACTIVE) { + seq_puts(seq, "Interface not active\n"); + goto out; + } + + seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", + BATADV_SOURCE_VERSION, hard_iface->net_dev->name, + hard_iface->net_dev->dev_addr, + hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); + + bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); + +out: + if (hard_iface) + batadv_hardif_free_ref(hard_iface); + return 0; +} + int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, int max_if_num) { diff --git a/net/batman-adv/originator.h b/net/batman-adv/originator.h index 6f77d808a91..db3a9ed734c 100644 --- a/net/batman-adv/originator.h +++ b/net/batman-adv/originator.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_ORIGINATOR_H_ @@ -31,13 +29,35 @@ void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node); struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, const uint8_t *addr); struct batadv_neigh_node * +batadv_neigh_node_get(const struct batadv_orig_node *orig_node, + const struct batadv_hard_iface *hard_iface, + const uint8_t *addr); +struct batadv_neigh_node * batadv_neigh_node_new(struct batadv_hard_iface *hard_iface, const uint8_t *neigh_addr, struct batadv_orig_node *orig_node); void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node); struct batadv_neigh_node * -batadv_orig_node_get_router(struct batadv_orig_node *orig_node); +batadv_orig_router_get(struct batadv_orig_node *orig_node, + const struct batadv_hard_iface *if_outgoing); +struct batadv_neigh_ifinfo * +batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, + struct batadv_hard_iface *if_outgoing); +struct batadv_neigh_ifinfo * +batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, + struct batadv_hard_iface *if_outgoing); +void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo); + +struct batadv_orig_ifinfo * +batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing); +struct batadv_orig_ifinfo * +batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing); +void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo); + int batadv_orig_seq_print_text(struct seq_file *seq, void *offset); +int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset); int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, int max_if_num); int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h index 207459b6296..34e096d2dce 100644 --- a/net/batman-adv/packet.h +++ b/net/batman-adv/packet.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_PACKET_H_ @@ -91,6 +89,19 @@ enum batadv_icmp_packettype { BATADV_PARAMETER_PROBLEM = 12, }; +/** + * enum batadv_mcast_flags - flags for multicast capabilities and settings + * @BATADV_MCAST_WANT_ALL_UNSNOOPABLES: we want all packets destined for + * 224.0.0.0/24 or ff02::1 + * @BATADV_MCAST_WANT_ALL_IPV4: we want all IPv4 multicast packets + * @BATADV_MCAST_WANT_ALL_IPV6: we want all IPv6 multicast packets + */ +enum batadv_mcast_flags { + BATADV_MCAST_WANT_ALL_UNSNOOPABLES = BIT(0), + BATADV_MCAST_WANT_ALL_IPV4 = BIT(1), + BATADV_MCAST_WANT_ALL_IPV6 = BIT(2), +}; + /* tt data subtypes */ #define BATADV_TT_DATA_TYPE_MASK 0x0F @@ -108,15 +119,36 @@ enum batadv_tt_data_flags { BATADV_TT_FULL_TABLE = BIT(4), }; -/* BATADV_TT_CLIENT flags. - * Flags from BIT(0) to BIT(7) are sent on the wire, while flags from BIT(8) to - * BIT(15) are used for local computation only. - * Flags from BIT(4) to BIT(7) are kept in sync with the rest of the network. +/** + * enum batadv_tt_client_flags - TT client specific flags + * @BATADV_TT_CLIENT_DEL: the client has to be deleted from the table + * @BATADV_TT_CLIENT_ROAM: the client roamed to/from another node and the new + * update telling its new real location has not been received/sent yet + * @BATADV_TT_CLIENT_WIFI: this client is connected through a wifi interface. + * This information is used by the "AP Isolation" feature + * @BATADV_TT_CLIENT_ISOLA: this client is considered "isolated". This + * information is used by the Extended Isolation feature + * @BATADV_TT_CLIENT_NOPURGE: this client should never be removed from the table + * @BATADV_TT_CLIENT_NEW: this client has been added to the local table but has + * not been announced yet + * @BATADV_TT_CLIENT_PENDING: this client is marked for removal but it is kept + * in the table for one more originator interval for consistency purposes + * @BATADV_TT_CLIENT_TEMP: this global client has been detected to be part of + * the network but no nnode has already announced it + * + * Bits from 0 to 7 are called _remote flags_ because they are sent on the wire. + * Bits from 8 to 15 are called _local flags_ because they are used for local + * computations only. + * + * Bits from 4 to 7 - a subset of remote flags - are ensured to be in sync with + * the other nodes in the network. To achieve this goal these flags are included + * in the TT CRC computation. */ enum batadv_tt_client_flags { BATADV_TT_CLIENT_DEL = BIT(0), BATADV_TT_CLIENT_ROAM = BIT(1), BATADV_TT_CLIENT_WIFI = BIT(4), + BATADV_TT_CLIENT_ISOLA = BIT(5), BATADV_TT_CLIENT_NOPURGE = BIT(8), BATADV_TT_CLIENT_NEW = BIT(9), BATADV_TT_CLIENT_PENDING = BIT(10), @@ -146,6 +178,7 @@ enum batadv_bla_claimframe { * @BATADV_TVLV_NC: network coding tvlv * @BATADV_TVLV_TT: translation table tvlv * @BATADV_TVLV_ROAM: roaming advertisement tvlv + * @BATADV_TVLV_MCAST: multicast capability tvlv */ enum batadv_tvlv_type { BATADV_TVLV_GW = 0x01, @@ -153,8 +186,10 @@ enum batadv_tvlv_type { BATADV_TVLV_NC = 0x03, BATADV_TVLV_TT = 0x04, BATADV_TVLV_ROAM = 0x05, + BATADV_TVLV_MCAST = 0x06, }; +#pragma pack(2) /* the destination hardware field in the ARP frame is used to * transport the claim type and the group id */ @@ -163,24 +198,20 @@ struct batadv_bla_claim_dst { uint8_t type; /* bla_claimframe */ __be16 group; /* group id */ }; - -struct batadv_header { - uint8_t packet_type; - uint8_t version; /* batman version field */ - uint8_t ttl; - /* the parent struct has to add a byte after the header to make - * everything 4 bytes aligned again - */ -}; +#pragma pack() /** * struct batadv_ogm_packet - ogm (routing protocol) packet - * @header: common batman packet header + * @packet_type: batman-adv packet type, part of the general header + * @version: batman-adv protocol version, part of the genereal header + * @ttl: time to live for this packet, part of the genereal header * @flags: contains routing relevant flags - see enum batadv_iv_flags * @tvlv_len: length of tvlv data following the ogm header */ struct batadv_ogm_packet { - struct batadv_header header; + uint8_t packet_type; + uint8_t version; + uint8_t ttl; uint8_t flags; __be32 seqno; uint8_t orig[ETH_ALEN]; @@ -196,29 +227,51 @@ struct batadv_ogm_packet { #define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet) /** - * batadv_icmp_header - common ICMP header - * @header: common batman header + * batadv_icmp_header - common members among all the ICMP packets + * @packet_type: batman-adv packet type, part of the general header + * @version: batman-adv protocol version, part of the genereal header + * @ttl: time to live for this packet, part of the genereal header * @msg_type: ICMP packet type * @dst: address of the destination node * @orig: address of the source node * @uid: local ICMP socket identifier + * @align: not used - useful for alignment purposes only + * + * This structure is used for ICMP packets parsing only and it is never sent + * over the wire. The alignment field at the end is there to ensure that + * members are padded the same way as they are in real packets. */ struct batadv_icmp_header { - struct batadv_header header; + uint8_t packet_type; + uint8_t version; + uint8_t ttl; uint8_t msg_type; /* see ICMP message types above */ uint8_t dst[ETH_ALEN]; uint8_t orig[ETH_ALEN]; uint8_t uid; + uint8_t align[3]; }; /** * batadv_icmp_packet - ICMP packet - * @icmph: common ICMP header + * @packet_type: batman-adv packet type, part of the general header + * @version: batman-adv protocol version, part of the genereal header + * @ttl: time to live for this packet, part of the genereal header + * @msg_type: ICMP packet type + * @dst: address of the destination node + * @orig: address of the source node + * @uid: local ICMP socket identifier * @reserved: not used - useful for alignment * @seqno: ICMP sequence number */ struct batadv_icmp_packet { - struct batadv_icmp_header icmph; + uint8_t packet_type; + uint8_t version; + uint8_t ttl; + uint8_t msg_type; /* see ICMP message types above */ + uint8_t dst[ETH_ALEN]; + uint8_t orig[ETH_ALEN]; + uint8_t uid; uint8_t reserved; __be16 seqno; }; @@ -227,13 +280,25 @@ struct batadv_icmp_packet { /** * batadv_icmp_packet_rr - ICMP RouteRecord packet - * @icmph: common ICMP header + * @packet_type: batman-adv packet type, part of the general header + * @version: batman-adv protocol version, part of the genereal header + * @ttl: time to live for this packet, part of the genereal header + * @msg_type: ICMP packet type + * @dst: address of the destination node + * @orig: address of the source node + * @uid: local ICMP socket identifier * @rr_cur: number of entries the rr array * @seqno: ICMP sequence number * @rr: route record array */ struct batadv_icmp_packet_rr { - struct batadv_icmp_header icmph; + uint8_t packet_type; + uint8_t version; + uint8_t ttl; + uint8_t msg_type; /* see ICMP message types above */ + uint8_t dst[ETH_ALEN]; + uint8_t orig[ETH_ALEN]; + uint8_t uid; uint8_t rr_cur; __be16 seqno; uint8_t rr[BATADV_RR_LEN][ETH_ALEN]; @@ -253,8 +318,18 @@ struct batadv_icmp_packet_rr { */ #pragma pack(2) +/** + * struct batadv_unicast_packet - unicast packet for network payload + * @packet_type: batman-adv packet type, part of the general header + * @version: batman-adv protocol version, part of the genereal header + * @ttl: time to live for this packet, part of the genereal header + * @ttvn: translation table version number + * @dest: originator destination of the unicast packet + */ struct batadv_unicast_packet { - struct batadv_header header; + uint8_t packet_type; + uint8_t version; + uint8_t ttl; uint8_t ttvn; /* destination translation table version number */ uint8_t dest[ETH_ALEN]; /* "4 bytes boundary + 2 bytes" long to make the payload after the @@ -280,7 +355,9 @@ struct batadv_unicast_4addr_packet { /** * struct batadv_frag_packet - fragmented packet - * @header: common batman packet header with type, compatversion, and ttl + * @packet_type: batman-adv packet type, part of the general header + * @version: batman-adv protocol version, part of the genereal header + * @ttl: time to live for this packet, part of the genereal header * @dest: final destination used when routing fragments * @orig: originator of the fragment used when merging the packet * @no: fragment number within this sequence @@ -289,7 +366,9 @@ struct batadv_unicast_4addr_packet { * @total_size: size of the merged packet */ struct batadv_frag_packet { - struct batadv_header header; + uint8_t packet_type; + uint8_t version; /* batman version field */ + uint8_t ttl; #if defined(__BIG_ENDIAN_BITFIELD) uint8_t no:4; uint8_t reserved:4; @@ -305,8 +384,19 @@ struct batadv_frag_packet { __be16 total_size; }; +/** + * struct batadv_bcast_packet - broadcast packet for network payload + * @packet_type: batman-adv packet type, part of the general header + * @version: batman-adv protocol version, part of the genereal header + * @ttl: time to live for this packet, part of the genereal header + * @reserved: reserved byte for alignment + * @seqno: sequence identification + * @orig: originator of the broadcast packet + */ struct batadv_bcast_packet { - struct batadv_header header; + uint8_t packet_type; + uint8_t version; /* batman version field */ + uint8_t ttl; uint8_t reserved; __be32 seqno; uint8_t orig[ETH_ALEN]; @@ -315,11 +405,11 @@ struct batadv_bcast_packet { */ }; -#pragma pack() - /** * struct batadv_coded_packet - network coded packet - * @header: common batman packet header and ttl of first included packet + * @packet_type: batman-adv packet type, part of the general header + * @version: batman-adv protocol version, part of the genereal header + * @ttl: time to live for this packet, part of the genereal header * @reserved: Align following fields to 2-byte boundaries * @first_source: original source of first included packet * @first_orig_dest: original destinal of first included packet @@ -334,7 +424,9 @@ struct batadv_bcast_packet { * @coded_len: length of network coded part of the payload */ struct batadv_coded_packet { - struct batadv_header header; + uint8_t packet_type; + uint8_t version; /* batman version field */ + uint8_t ttl; uint8_t first_ttvn; /* uint8_t first_dest[ETH_ALEN]; - saved in mac header destination */ uint8_t first_source[ETH_ALEN]; @@ -349,9 +441,13 @@ struct batadv_coded_packet { __be16 coded_len; }; +#pragma pack() + /** * struct batadv_unicast_tvlv - generic unicast packet with tvlv payload - * @header: common batman packet header + * @packet_type: batman-adv packet type, part of the general header + * @version: batman-adv protocol version, part of the genereal header + * @ttl: time to live for this packet, part of the genereal header * @reserved: reserved field (for packet alignment) * @src: address of the source * @dst: address of the destination @@ -359,7 +455,9 @@ struct batadv_coded_packet { * @align: 2 bytes to align the header to a 4 byte boundry */ struct batadv_unicast_tvlv_packet { - struct batadv_header header; + uint8_t packet_type; + uint8_t version; /* batman version field */ + uint8_t ttl; uint8_t reserved; uint8_t dst[ETH_ALEN]; uint8_t src[ETH_ALEN]; @@ -420,13 +518,13 @@ struct batadv_tvlv_tt_vlan_data { * struct batadv_tvlv_tt_change - translation table diff data * @flags: status indicators concerning the non-mesh client (see * batadv_tt_client_flags) - * @reserved: reserved field + * @reserved: reserved field - useful for alignment purposes only * @addr: mac address of non-mesh client that triggered this tt change * @vid: VLAN identifier */ struct batadv_tvlv_tt_change { uint8_t flags; - uint8_t reserved; + uint8_t reserved[3]; uint8_t addr[ETH_ALEN]; __be16 vid; }; @@ -441,4 +539,14 @@ struct batadv_tvlv_roam_adv { __be16 vid; }; +/** + * struct batadv_tvlv_mcast_data - payload of a multicast tvlv + * @flags: multicast flags announced by the orig node + * @reserved: reserved field + */ +struct batadv_tvlv_mcast_data { + uint8_t flags; + uint8_t reserved[3]; +}; + #endif /* _NET_BATMAN_ADV_PACKET_H_ */ diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index d4114d775ad..35141534938 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -35,13 +33,32 @@ static int batadv_route_unicast_packet(struct sk_buff *skb, struct batadv_hard_iface *recv_if); +/** + * _batadv_update_route - set the router for this originator + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: orig node which is to be configured + * @recv_if: the receive interface for which this route is set + * @neigh_node: neighbor which should be the next router + * + * This function does not perform any error checks + */ static void _batadv_update_route(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, + struct batadv_hard_iface *recv_if, struct batadv_neigh_node *neigh_node) { + struct batadv_orig_ifinfo *orig_ifinfo; struct batadv_neigh_node *curr_router; - curr_router = batadv_orig_node_get_router(orig_node); + orig_ifinfo = batadv_orig_ifinfo_get(orig_node, recv_if); + if (!orig_ifinfo) + return; + + rcu_read_lock(); + curr_router = rcu_dereference(orig_ifinfo->router); + if (curr_router && !atomic_inc_not_zero(&curr_router->refcount)) + curr_router = NULL; + rcu_read_unlock(); /* route deleted */ if ((curr_router) && (!neigh_node)) { @@ -71,16 +88,25 @@ static void _batadv_update_route(struct batadv_priv *bat_priv, neigh_node = NULL; spin_lock_bh(&orig_node->neigh_list_lock); - rcu_assign_pointer(orig_node->router, neigh_node); + rcu_assign_pointer(orig_ifinfo->router, neigh_node); spin_unlock_bh(&orig_node->neigh_list_lock); + batadv_orig_ifinfo_free_ref(orig_ifinfo); /* decrease refcount of previous best neighbor */ if (curr_router) batadv_neigh_node_free_ref(curr_router); } +/** + * batadv_update_route - set the router for this originator + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: orig node which is to be configured + * @recv_if: the receive interface for which this route is set + * @neigh_node: neighbor which should be the next router + */ void batadv_update_route(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, + struct batadv_hard_iface *recv_if, struct batadv_neigh_node *neigh_node) { struct batadv_neigh_node *router = NULL; @@ -88,125 +114,16 @@ void batadv_update_route(struct batadv_priv *bat_priv, if (!orig_node) goto out; - router = batadv_orig_node_get_router(orig_node); + router = batadv_orig_router_get(orig_node, recv_if); if (router != neigh_node) - _batadv_update_route(bat_priv, orig_node, neigh_node); - -out: - if (router) - batadv_neigh_node_free_ref(router); -} - -/* caller must hold the neigh_list_lock */ -void batadv_bonding_candidate_del(struct batadv_orig_node *orig_node, - struct batadv_neigh_node *neigh_node) -{ - /* this neighbor is not part of our candidate list */ - if (list_empty(&neigh_node->bonding_list)) - goto out; - - list_del_rcu(&neigh_node->bonding_list); - INIT_LIST_HEAD(&neigh_node->bonding_list); - batadv_neigh_node_free_ref(neigh_node); - atomic_dec(&orig_node->bond_candidates); - -out: - return; -} - -/** - * batadv_bonding_candidate_add - consider a new link for bonding mode towards - * the given originator - * @bat_priv: the bat priv with all the soft interface information - * @orig_node: the target node - * @neigh_node: the neighbor representing the new link to consider for bonding - * mode - */ -void batadv_bonding_candidate_add(struct batadv_priv *bat_priv, - struct batadv_orig_node *orig_node, - struct batadv_neigh_node *neigh_node) -{ - struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; - struct batadv_neigh_node *tmp_neigh_node, *router = NULL; - uint8_t interference_candidate = 0; - - spin_lock_bh(&orig_node->neigh_list_lock); - - /* only consider if it has the same primary address ... */ - if (!batadv_compare_eth(orig_node->orig, - neigh_node->orig_node->primary_addr)) - goto candidate_del; - - router = batadv_orig_node_get_router(orig_node); - if (!router) - goto candidate_del; - - - /* ... and is good enough to be considered */ - if (bao->bat_neigh_is_equiv_or_better(neigh_node, router)) - goto candidate_del; - - /* check if we have another candidate with the same mac address or - * interface. If we do, we won't select this candidate because of - * possible interference. - */ - hlist_for_each_entry_rcu(tmp_neigh_node, - &orig_node->neigh_list, list) { - if (tmp_neigh_node == neigh_node) - continue; - - /* we only care if the other candidate is even - * considered as candidate. - */ - if (list_empty(&tmp_neigh_node->bonding_list)) - continue; - - if ((neigh_node->if_incoming == tmp_neigh_node->if_incoming) || - (batadv_compare_eth(neigh_node->addr, - tmp_neigh_node->addr))) { - interference_candidate = 1; - break; - } - } - - /* don't care further if it is an interference candidate */ - if (interference_candidate) - goto candidate_del; - - /* this neighbor already is part of our candidate list */ - if (!list_empty(&neigh_node->bonding_list)) - goto out; - - if (!atomic_inc_not_zero(&neigh_node->refcount)) - goto out; - - list_add_rcu(&neigh_node->bonding_list, &orig_node->bond_list); - atomic_inc(&orig_node->bond_candidates); - goto out; - -candidate_del: - batadv_bonding_candidate_del(orig_node, neigh_node); + _batadv_update_route(bat_priv, orig_node, recv_if, neigh_node); out: - spin_unlock_bh(&orig_node->neigh_list_lock); - if (router) batadv_neigh_node_free_ref(router); } -/* copy primary address for bonding */ -void -batadv_bonding_save_primary(const struct batadv_orig_node *orig_node, - struct batadv_orig_node *orig_neigh_node, - const struct batadv_ogm_packet *batman_ogm_packet) -{ - if (!(batman_ogm_packet->flags & BATADV_PRIMARIES_FIRST_HOP)) - return; - - memcpy(orig_neigh_node->primary_addr, orig_node->orig, ETH_ALEN); -} - /* checks whether the host restarted and is in the protection time. * returns: * 0 if the packet is to be accepted @@ -305,10 +222,10 @@ static int batadv_recv_my_icmp_packet(struct batadv_priv *bat_priv, icmph = (struct batadv_icmp_header *)skb->data; - memcpy(icmph->dst, icmph->orig, ETH_ALEN); - memcpy(icmph->orig, primary_if->net_dev->dev_addr, ETH_ALEN); + ether_addr_copy(icmph->dst, icmph->orig); + ether_addr_copy(icmph->orig, primary_if->net_dev->dev_addr); icmph->msg_type = BATADV_ECHO_REPLY; - icmph->header.ttl = BATADV_TTL; + icmph->ttl = BATADV_TTL; res = batadv_send_skb_to_orig(skb, orig_node, NULL); if (res != NET_XMIT_DROP) @@ -338,9 +255,9 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv, icmp_packet = (struct batadv_icmp_packet *)skb->data; /* send TTL exceeded if packet is an echo request (traceroute) */ - if (icmp_packet->icmph.msg_type != BATADV_ECHO_REQUEST) { + if (icmp_packet->msg_type != BATADV_ECHO_REQUEST) { pr_debug("Warning - can't forward icmp packet from %pM to %pM: ttl exceeded\n", - icmp_packet->icmph.orig, icmp_packet->icmph.dst); + icmp_packet->orig, icmp_packet->dst); goto out; } @@ -349,7 +266,7 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv, goto out; /* get routing information */ - orig_node = batadv_orig_hash_find(bat_priv, icmp_packet->icmph.orig); + orig_node = batadv_orig_hash_find(bat_priv, icmp_packet->orig); if (!orig_node) goto out; @@ -359,11 +276,10 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv, icmp_packet = (struct batadv_icmp_packet *)skb->data; - memcpy(icmp_packet->icmph.dst, icmp_packet->icmph.orig, ETH_ALEN); - memcpy(icmp_packet->icmph.orig, primary_if->net_dev->dev_addr, - ETH_ALEN); - icmp_packet->icmph.msg_type = BATADV_TTL_EXCEEDED; - icmp_packet->icmph.header.ttl = BATADV_TTL; + ether_addr_copy(icmp_packet->dst, icmp_packet->orig); + ether_addr_copy(icmp_packet->orig, primary_if->net_dev->dev_addr); + icmp_packet->msg_type = BATADV_TTL_EXCEEDED; + icmp_packet->ttl = BATADV_TTL; if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP) ret = NET_RX_SUCCESS; @@ -424,8 +340,8 @@ int batadv_recv_icmp_packet(struct sk_buff *skb, if (icmp_packet_rr->rr_cur >= BATADV_RR_LEN) goto out; - memcpy(&(icmp_packet_rr->rr[icmp_packet_rr->rr_cur]), - ethhdr->h_dest, ETH_ALEN); + ether_addr_copy(icmp_packet_rr->rr[icmp_packet_rr->rr_cur], + ethhdr->h_dest); icmp_packet_rr->rr_cur++; } @@ -434,7 +350,7 @@ int batadv_recv_icmp_packet(struct sk_buff *skb, return batadv_recv_my_icmp_packet(bat_priv, skb); /* TTL exceeded */ - if (icmph->header.ttl < 2) + if (icmph->ttl < 2) return batadv_recv_icmp_ttl_exceeded(bat_priv, skb); /* get routing information */ @@ -449,7 +365,7 @@ int batadv_recv_icmp_packet(struct sk_buff *skb, icmph = (struct batadv_icmp_header *)skb->data; /* decrement ttl */ - icmph->header.ttl--; + icmph->ttl--; /* route it */ if (batadv_send_skb_to_orig(skb, orig_node, recv_if) != NET_XMIT_DROP) @@ -461,114 +377,6 @@ out: return ret; } -/* In the bonding case, send the packets in a round - * robin fashion over the remaining interfaces. - * - * This method rotates the bonding list and increases the - * returned router's refcount. - */ -static struct batadv_neigh_node * -batadv_find_bond_router(struct batadv_orig_node *primary_orig, - const struct batadv_hard_iface *recv_if) -{ - struct batadv_neigh_node *tmp_neigh_node; - struct batadv_neigh_node *router = NULL, *first_candidate = NULL; - - rcu_read_lock(); - list_for_each_entry_rcu(tmp_neigh_node, &primary_orig->bond_list, - bonding_list) { - if (!first_candidate) - first_candidate = tmp_neigh_node; - - /* recv_if == NULL on the first node. */ - if (tmp_neigh_node->if_incoming == recv_if) - continue; - - if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) - continue; - - router = tmp_neigh_node; - break; - } - - /* use the first candidate if nothing was found. */ - if (!router && first_candidate && - atomic_inc_not_zero(&first_candidate->refcount)) - router = first_candidate; - - if (!router) - goto out; - - /* selected should point to the next element - * after the current router - */ - spin_lock_bh(&primary_orig->neigh_list_lock); - /* this is a list_move(), which unfortunately - * does not exist as rcu version - */ - list_del_rcu(&primary_orig->bond_list); - list_add_rcu(&primary_orig->bond_list, - &router->bonding_list); - spin_unlock_bh(&primary_orig->neigh_list_lock); - -out: - rcu_read_unlock(); - return router; -} - -/** - * batadv_find_ifalter_router - find the best of the remaining candidates which - * are not using this interface - * @bat_priv: the bat priv with all the soft interface information - * @primary_orig: the destination - * @recv_if: the interface that the router returned by this function has to not - * use - * - * Returns the best candidate towards primary_orig that is not using recv_if. - * Increases the returned neighbor's refcount - */ -static struct batadv_neigh_node * -batadv_find_ifalter_router(struct batadv_priv *bat_priv, - struct batadv_orig_node *primary_orig, - const struct batadv_hard_iface *recv_if) -{ - struct batadv_neigh_node *router = NULL, *first_candidate = NULL; - struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; - struct batadv_neigh_node *tmp_neigh_node; - - rcu_read_lock(); - list_for_each_entry_rcu(tmp_neigh_node, &primary_orig->bond_list, - bonding_list) { - if (!first_candidate) - first_candidate = tmp_neigh_node; - - /* recv_if == NULL on the first node. */ - if (tmp_neigh_node->if_incoming == recv_if) - continue; - - if (router && bao->bat_neigh_cmp(tmp_neigh_node, router)) - continue; - - if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) - continue; - - /* decrement refcount of previously selected router */ - if (router) - batadv_neigh_node_free_ref(router); - - /* we found a better router (or at least one valid router) */ - router = tmp_neigh_node; - } - - /* use the first candidate if nothing was found. */ - if (!router && first_candidate && - atomic_inc_not_zero(&first_candidate->refcount)) - router = first_candidate; - - rcu_read_unlock(); - return router; -} - /** * batadv_check_unicast_packet - Check for malformed unicast packets * @bat_priv: the bat priv with all the soft interface information @@ -606,95 +414,141 @@ static int batadv_check_unicast_packet(struct batadv_priv *bat_priv, return 0; } -/* find a suitable router for this originator, and use - * bonding if possible. increases the found neighbors - * refcount. +/** + * batadv_find_router - find a suitable router for this originator + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: the destination node + * @recv_if: pointer to interface this packet was received on + * + * Returns the router which should be used for this orig_node on + * this interface, or NULL if not available. */ struct batadv_neigh_node * batadv_find_router(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, - const struct batadv_hard_iface *recv_if) + struct batadv_hard_iface *recv_if) { - struct batadv_orig_node *primary_orig_node; - struct batadv_orig_node *router_orig; - struct batadv_neigh_node *router; - static uint8_t zero_mac[ETH_ALEN] = {0, 0, 0, 0, 0, 0}; - int bonding_enabled; - uint8_t *primary_addr; + struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; + struct batadv_neigh_node *first_candidate_router = NULL; + struct batadv_neigh_node *next_candidate_router = NULL; + struct batadv_neigh_node *router, *cand_router = NULL; + struct batadv_neigh_node *last_cand_router = NULL; + struct batadv_orig_ifinfo *cand, *first_candidate = NULL; + struct batadv_orig_ifinfo *next_candidate = NULL; + struct batadv_orig_ifinfo *last_candidate; + bool last_candidate_found = false; if (!orig_node) return NULL; - router = batadv_orig_node_get_router(orig_node); - if (!router) - goto err; + router = batadv_orig_router_get(orig_node, recv_if); - /* without bonding, the first node should - * always choose the default router. + /* only consider bonding for recv_if == BATADV_IF_DEFAULT (first hop) + * and if activated. + */ + if (recv_if == BATADV_IF_DEFAULT || !atomic_read(&bat_priv->bonding) || + !router) + return router; + + /* bonding: loop through the list of possible routers found + * for the various outgoing interfaces and find a candidate after + * the last chosen bonding candidate (next_candidate). If no such + * router is found, use the first candidate found (the previously + * chosen bonding candidate might have been the last one in the list). + * If this can't be found either, return the previously choosen + * router - obviously there are no other candidates. */ - bonding_enabled = atomic_read(&bat_priv->bonding); - rcu_read_lock(); - /* select default router to output */ - router_orig = router->orig_node; - if (!router_orig) - goto err_unlock; + last_candidate = orig_node->last_bonding_candidate; + if (last_candidate) + last_cand_router = rcu_dereference(last_candidate->router); - if ((!recv_if) && (!bonding_enabled)) - goto return_router; + hlist_for_each_entry_rcu(cand, &orig_node->ifinfo_list, list) { + /* acquire some structures and references ... */ + if (!atomic_inc_not_zero(&cand->refcount)) + continue; - primary_addr = router_orig->primary_addr; + cand_router = rcu_dereference(cand->router); + if (!cand_router) + goto next; - /* if we have something in the primary_addr, we can search - * for a potential bonding candidate. - */ - if (batadv_compare_eth(primary_addr, zero_mac)) - goto return_router; + if (!atomic_inc_not_zero(&cand_router->refcount)) { + cand_router = NULL; + goto next; + } - /* find the orig_node which has the primary interface. might - * even be the same as our router_orig in many cases - */ - if (batadv_compare_eth(primary_addr, router_orig->orig)) { - primary_orig_node = router_orig; - } else { - primary_orig_node = batadv_orig_hash_find(bat_priv, - primary_addr); - if (!primary_orig_node) - goto return_router; + /* alternative candidate should be good enough to be + * considered + */ + if (!bao->bat_neigh_is_equiv_or_better(cand_router, + cand->if_outgoing, + router, recv_if)) + goto next; + + /* don't use the same router twice */ + if (last_cand_router == cand_router) + goto next; + + /* mark the first possible candidate */ + if (!first_candidate) { + atomic_inc(&cand_router->refcount); + atomic_inc(&cand->refcount); + first_candidate = cand; + first_candidate_router = cand_router; + } + + /* check if the loop has already passed the previously selected + * candidate ... this function should select the next candidate + * AFTER the previously used bonding candidate. + */ + if (!last_candidate || last_candidate_found) { + next_candidate = cand; + next_candidate_router = cand_router; + break; + } - batadv_orig_node_free_ref(primary_orig_node); + if (last_candidate == cand) + last_candidate_found = true; +next: + /* free references */ + if (cand_router) { + batadv_neigh_node_free_ref(cand_router); + cand_router = NULL; + } + batadv_orig_ifinfo_free_ref(cand); } + rcu_read_unlock(); - /* with less than 2 candidates, we can't do any - * bonding and prefer the original router. - */ - if (atomic_read(&primary_orig_node->bond_candidates) < 2) - goto return_router; + /* last_bonding_candidate is reset below, remove the old reference. */ + if (orig_node->last_bonding_candidate) + batadv_orig_ifinfo_free_ref(orig_node->last_bonding_candidate); - /* all nodes between should choose a candidate which - * is is not on the interface where the packet came - * in. + /* After finding candidates, handle the three cases: + * 1) there is a next candidate, use that + * 2) there is no next candidate, use the first of the list + * 3) there is no candidate at all, return the default router */ - batadv_neigh_node_free_ref(router); + if (next_candidate) { + batadv_neigh_node_free_ref(router); - if (bonding_enabled) - router = batadv_find_bond_router(primary_orig_node, recv_if); - else - router = batadv_find_ifalter_router(bat_priv, primary_orig_node, - recv_if); + /* remove references to first candidate, we don't need it. */ + if (first_candidate) { + batadv_neigh_node_free_ref(first_candidate_router); + batadv_orig_ifinfo_free_ref(first_candidate); + } + router = next_candidate_router; + orig_node->last_bonding_candidate = next_candidate; + } else if (first_candidate) { + batadv_neigh_node_free_ref(router); -return_router: - if (router && router->if_incoming->if_status != BATADV_IF_ACTIVE) - goto err_unlock; + /* refcounting has already been done in the loop above. */ + router = first_candidate_router; + orig_node->last_bonding_candidate = first_candidate; + } else { + orig_node->last_bonding_candidate = NULL; + } - rcu_read_unlock(); return router; -err_unlock: - rcu_read_unlock(); -err: - if (router) - batadv_neigh_node_free_ref(router); - return NULL; } static int batadv_route_unicast_packet(struct sk_buff *skb, @@ -709,7 +563,7 @@ static int batadv_route_unicast_packet(struct sk_buff *skb, unicast_packet = (struct batadv_unicast_packet *)skb->data; /* TTL exceeded */ - if (unicast_packet->header.ttl < 2) { + if (unicast_packet->ttl < 2) { pr_debug("Warning - can't forward unicast packet from %pM to %pM: ttl exceeded\n", ethhdr->h_source, unicast_packet->dest); goto out; @@ -727,9 +581,9 @@ static int batadv_route_unicast_packet(struct sk_buff *skb, /* decrement ttl */ unicast_packet = (struct batadv_unicast_packet *)skb->data; - unicast_packet->header.ttl--; + unicast_packet->ttl--; - switch (unicast_packet->header.packet_type) { + switch (unicast_packet->packet_type) { case BATADV_UNICAST_4ADDR: hdr_len = sizeof(struct batadv_unicast_4addr_packet); break; @@ -809,7 +663,7 @@ batadv_reroute_unicast_packet(struct batadv_priv *bat_priv, } /* update the packet header */ - memcpy(unicast_packet->dest, orig_addr, ETH_ALEN); + ether_addr_copy(unicast_packet->dest, orig_addr); unicast_packet->ttvn = orig_ttvn; ret = true; @@ -833,7 +687,7 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv, int is_old_ttvn; /* check if there is enough data before accessing it */ - if (pskb_may_pull(skb, hdr_len + ETH_HLEN) < 0) + if (!pskb_may_pull(skb, hdr_len + ETH_HLEN)) return 0; /* create a copy of the skb (in case of for re-routing) to modify it. */ @@ -919,7 +773,7 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv, if (!primary_if) return 0; - memcpy(unicast_packet->dest, primary_if->net_dev->dev_addr, ETH_ALEN); + ether_addr_copy(unicast_packet->dest, primary_if->net_dev->dev_addr); batadv_hardif_free_ref(primary_if); @@ -970,7 +824,7 @@ int batadv_recv_unicast_packet(struct sk_buff *skb, unicast_packet = (struct batadv_unicast_packet *)skb->data; unicast_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; - is4addr = unicast_packet->header.packet_type == BATADV_UNICAST_4ADDR; + is4addr = unicast_packet->packet_type == BATADV_UNICAST_4ADDR; /* the caller function should have already pulled 2 bytes */ if (is4addr) hdr_size = sizeof(*unicast_4addr_packet); @@ -1063,6 +917,8 @@ int batadv_recv_unicast_tvlv(struct sk_buff *skb, if (ret != NET_RX_SUCCESS) ret = batadv_route_unicast_packet(skb, recv_if); + else + consume_skb(skb); return ret; } @@ -1135,6 +991,7 @@ int batadv_recv_bcast_packet(struct sk_buff *skb, int hdr_size = sizeof(*bcast_packet); int ret = NET_RX_DROP; int32_t seq_diff; + uint32_t seqno; /* drop packet if it has not necessary minimum size */ if (unlikely(!pskb_may_pull(skb, hdr_size))) @@ -1160,7 +1017,7 @@ int batadv_recv_bcast_packet(struct sk_buff *skb, if (batadv_is_my_mac(bat_priv, bcast_packet->orig)) goto out; - if (bcast_packet->header.ttl < 2) + if (bcast_packet->ttl < 2) goto out; orig_node = batadv_orig_hash_find(bat_priv, bcast_packet->orig); @@ -1170,12 +1027,13 @@ int batadv_recv_bcast_packet(struct sk_buff *skb, spin_lock_bh(&orig_node->bcast_seqno_lock); + seqno = ntohl(bcast_packet->seqno); /* check whether the packet is a duplicate */ if (batadv_test_bit(orig_node->bcast_bits, orig_node->last_bcast_seqno, - ntohl(bcast_packet->seqno))) + seqno)) goto spin_unlock; - seq_diff = ntohl(bcast_packet->seqno) - orig_node->last_bcast_seqno; + seq_diff = seqno - orig_node->last_bcast_seqno; /* check whether the packet is old and the host just restarted. */ if (batadv_window_protected(bat_priv, seq_diff, @@ -1186,7 +1044,7 @@ int batadv_recv_bcast_packet(struct sk_buff *skb, * if required. */ if (batadv_bit_get_packet(bat_priv, orig_node->bcast_bits, seq_diff, 1)) - orig_node->last_bcast_seqno = ntohl(bcast_packet->seqno); + orig_node->last_bcast_seqno = seqno; spin_unlock_bh(&orig_node->bcast_seqno_lock); diff --git a/net/batman-adv/routing.h b/net/batman-adv/routing.h index 19544ddb81b..557d3d12a9a 100644 --- a/net/batman-adv/routing.h +++ b/net/batman-adv/routing.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_ROUTING_H_ @@ -25,6 +23,7 @@ bool batadv_check_management_packet(struct sk_buff *skb, int header_len); void batadv_update_route(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, + struct batadv_hard_iface *recv_if, struct batadv_neigh_node *neigh_node); int batadv_recv_icmp_packet(struct sk_buff *skb, struct batadv_hard_iface *recv_if); @@ -45,16 +44,7 @@ int batadv_recv_unhandled_unicast_packet(struct sk_buff *skb, struct batadv_neigh_node * batadv_find_router(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, - const struct batadv_hard_iface *recv_if); -void batadv_bonding_candidate_del(struct batadv_orig_node *orig_node, - struct batadv_neigh_node *neigh_node); -void batadv_bonding_candidate_add(struct batadv_priv *bat_priv, - struct batadv_orig_node *orig_node, - struct batadv_neigh_node *neigh_node); -void batadv_bonding_save_primary(const struct batadv_orig_node *orig_node, - struct batadv_orig_node *orig_neigh_node, - const struct batadv_ogm_packet - *batman_ogm_packet); + struct batadv_hard_iface *recv_if); int batadv_window_protected(struct batadv_priv *bat_priv, int32_t seq_num_diff, unsigned long *last_reset); diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c index c83be5ebaa2..3d64ed20c39 100644 --- a/net/batman-adv/send.c +++ b/net/batman-adv/send.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -29,6 +27,7 @@ #include "originator.h" #include "network-coding.h" #include "fragmentation.h" +#include "multicast.h" static void batadv_send_outstanding_bcast_packet(struct work_struct *work); @@ -61,8 +60,8 @@ int batadv_send_skb_packet(struct sk_buff *skb, skb_reset_mac_header(skb); ethhdr = eth_hdr(skb); - memcpy(ethhdr->h_source, hard_iface->net_dev->dev_addr, ETH_ALEN); - memcpy(ethhdr->h_dest, dst_addr, ETH_ALEN); + ether_addr_copy(ethhdr->h_source, hard_iface->net_dev->dev_addr); + ether_addr_copy(ethhdr->h_dest, dst_addr); ethhdr->h_proto = htons(ETH_P_BATMAN); skb_set_network_header(skb, ETH_HLEN); @@ -161,13 +160,13 @@ batadv_send_skb_push_fill_unicast(struct sk_buff *skb, int hdr_size, return false; unicast_packet = (struct batadv_unicast_packet *)skb->data; - unicast_packet->header.version = BATADV_COMPAT_VERSION; + unicast_packet->version = BATADV_COMPAT_VERSION; /* batman packet type: unicast */ - unicast_packet->header.packet_type = BATADV_UNICAST; + unicast_packet->packet_type = BATADV_UNICAST; /* set unicast ttl */ - unicast_packet->header.ttl = BATADV_TTL; + unicast_packet->ttl = BATADV_TTL; /* copy the destination for faster routing */ - memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN); + ether_addr_copy(unicast_packet->dest, orig_node->orig); /* set the destination tt version number */ unicast_packet->ttvn = ttvn; @@ -221,8 +220,8 @@ bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv, goto out; uc_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; - uc_4addr_packet->u.header.packet_type = BATADV_UNICAST_4ADDR; - memcpy(uc_4addr_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN); + uc_4addr_packet->u.packet_type = BATADV_UNICAST_4ADDR; + ether_addr_copy(uc_4addr_packet->src, primary_if->net_dev->dev_addr); uc_4addr_packet->subtype = packet_subtype; uc_4addr_packet->reserved = 0; @@ -250,13 +249,13 @@ out: * * Returns NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. */ -static int batadv_send_skb_unicast(struct batadv_priv *bat_priv, - struct sk_buff *skb, int packet_type, - int packet_subtype, - struct batadv_orig_node *orig_node, - unsigned short vid) +int batadv_send_skb_unicast(struct batadv_priv *bat_priv, + struct sk_buff *skb, int packet_type, + int packet_subtype, + struct batadv_orig_node *orig_node, + unsigned short vid) { - struct ethhdr *ethhdr = (struct ethhdr *)skb->data; + struct ethhdr *ethhdr; struct batadv_unicast_packet *unicast_packet; int ret = NET_XMIT_DROP; @@ -281,6 +280,10 @@ static int batadv_send_skb_unicast(struct batadv_priv *bat_priv, goto out; } + /* skb->data might have been reallocated by + * batadv_send_skb_prepare_unicast{,_4addr}() + */ + ethhdr = eth_hdr(skb); unicast_packet = (struct batadv_unicast_packet *)skb->data; /* inform the destination node that we are still missing a correct route @@ -309,6 +312,7 @@ out: * @packet_type: the batman unicast packet type to use * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast * 4addr packets) + * @dst_hint: can be used to override the destination contained in the skb * @vid: the vid to be used to search the translation table * * Look up the recipient node for the destination address in the ethernet @@ -321,13 +325,23 @@ out: */ int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv, struct sk_buff *skb, int packet_type, - int packet_subtype, unsigned short vid) + int packet_subtype, uint8_t *dst_hint, + unsigned short vid) { struct ethhdr *ethhdr = (struct ethhdr *)skb->data; struct batadv_orig_node *orig_node; + uint8_t *src, *dst; + + src = ethhdr->h_source; + dst = ethhdr->h_dest; + + /* if we got an hint! let's send the packet to this client (if any) */ + if (dst_hint) { + src = NULL; + dst = dst_hint; + } + orig_node = batadv_transtable_search(bat_priv, src, dst, vid); - orig_node = batadv_transtable_search(bat_priv, ethhdr->h_source, - ethhdr->h_dest, vid); return batadv_send_skb_unicast(bat_priv, skb, packet_type, packet_subtype, orig_node, vid); } @@ -379,6 +393,8 @@ static void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet) kfree_skb(forw_packet->skb); if (forw_packet->if_incoming) batadv_hardif_free_ref(forw_packet->if_incoming); + if (forw_packet->if_outgoing) + batadv_hardif_free_ref(forw_packet->if_outgoing); kfree(forw_packet); } @@ -436,12 +452,13 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, /* as we have a copy now, it is safe to decrease the TTL */ bcast_packet = (struct batadv_bcast_packet *)newskb->data; - bcast_packet->header.ttl--; + bcast_packet->ttl--; skb_reset_mac_header(newskb); forw_packet->skb = newskb; forw_packet->if_incoming = primary_if; + forw_packet->if_outgoing = NULL; /* how often did we send the bcast packet ? */ forw_packet->num_packets = 0; @@ -537,11 +554,16 @@ void batadv_send_outstanding_bat_ogm_packet(struct work_struct *work) bat_priv->bat_algo_ops->bat_ogm_emit(forw_packet); - /* we have to have at least one packet in the queue - * to determine the queues wake up time unless we are - * shutting down + /* we have to have at least one packet in the queue to determine the + * queues wake up time unless we are shutting down. + * + * only re-schedule if this is the "original" copy, e.g. the OGM of the + * primary interface should only be rescheduled once per period, but + * this function will be called for the forw_packet instances of the + * other secondary interfaces as well. */ - if (forw_packet->own) + if (forw_packet->own && + forw_packet->if_incoming == forw_packet->if_outgoing) batadv_schedule_bat_ogm(forw_packet->if_incoming); out: @@ -602,7 +624,8 @@ batadv_purge_outstanding_packets(struct batadv_priv *bat_priv, * we delete only packets belonging to the given interface */ if ((hard_iface) && - (forw_packet->if_incoming != hard_iface)) + (forw_packet->if_incoming != hard_iface) && + (forw_packet->if_outgoing != hard_iface)) continue; spin_unlock_bh(&bat_priv->forw_bat_list_lock); diff --git a/net/batman-adv/send.h b/net/batman-adv/send.h index aa2e2537a73..38d0ec1833a 100644 --- a/net/batman-adv/send.h +++ b/net/batman-adv/send.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_SEND_H_ @@ -38,9 +36,15 @@ bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv, struct sk_buff *skb, struct batadv_orig_node *orig_node, int packet_subtype); +int batadv_send_skb_unicast(struct batadv_priv *bat_priv, + struct sk_buff *skb, int packet_type, + int packet_subtype, + struct batadv_orig_node *orig_node, + unsigned short vid); int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv, struct sk_buff *skb, int packet_type, - int packet_subtype, unsigned short vid); + int packet_subtype, uint8_t *dst_hint, + unsigned short vid); int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb, unsigned short vid); @@ -48,6 +52,7 @@ int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb, * batadv_send_skb_via_tt - send an skb via TT lookup * @bat_priv: the bat priv with all the soft interface information * @skb: the payload to send + * @dst_hint: can be used to override the destination contained in the skb * @vid: the vid to be used to search the translation table * * Look up the recipient node for the destination address in the ethernet @@ -57,11 +62,11 @@ int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb, * Returns NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. */ static inline int batadv_send_skb_via_tt(struct batadv_priv *bat_priv, - struct sk_buff *skb, + struct sk_buff *skb, uint8_t *dst_hint, unsigned short vid) { return batadv_send_skb_via_tt_generic(bat_priv, skb, BATADV_UNICAST, 0, - vid); + dst_hint, vid); } /** @@ -69,6 +74,7 @@ static inline int batadv_send_skb_via_tt(struct batadv_priv *bat_priv, * @bat_priv: the bat priv with all the soft interface information * @skb: the payload to send * @packet_subtype: the unicast 4addr packet subtype to use + * @dst_hint: can be used to override the destination contained in the skb * @vid: the vid to be used to search the translation table * * Look up the recipient node for the destination address in the ethernet @@ -81,11 +87,12 @@ static inline int batadv_send_skb_via_tt(struct batadv_priv *bat_priv, static inline int batadv_send_skb_via_tt_4addr(struct batadv_priv *bat_priv, struct sk_buff *skb, int packet_subtype, + uint8_t *dst_hint, unsigned short vid) { return batadv_send_skb_via_tt_generic(bat_priv, skb, BATADV_UNICAST_4ADDR, - packet_subtype, vid); + packet_subtype, dst_hint, vid); } #endif /* _NET_BATMAN_ADV_SEND_H_ */ diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 36f050876f8..cbd677f48c0 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -34,6 +32,7 @@ #include <linux/ethtool.h> #include <linux/etherdevice.h> #include <linux/if_vlan.h> +#include "multicast.h" #include "bridge_loop_avoidance.h" #include "network-coding.h" @@ -113,15 +112,15 @@ static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) if (!is_valid_ether_addr(addr->sa_data)) return -EADDRNOTAVAIL; - memcpy(old_addr, dev->dev_addr, ETH_ALEN); - memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); + 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) { batadv_tt_local_remove(bat_priv, old_addr, BATADV_NO_FLAGS, "mac address changed", false); batadv_tt_local_add(dev, addr->sa_data, BATADV_NO_FLAGS, - BATADV_NULL_IFINDEX); + BATADV_NULL_IFINDEX, BATADV_NO_MARK); } return 0; @@ -162,6 +161,8 @@ static int batadv_interface_tx(struct sk_buff *skb, 0x00, 0x00}; static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, 0x00, 0x00}; + enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO; + uint8_t *dst_hint = NULL, chaddr[ETH_ALEN]; struct vlan_ethhdr *vhdr; unsigned int header_len = 0; int data_len = skb->len, ret; @@ -169,17 +170,20 @@ static int batadv_interface_tx(struct sk_buff *skb, bool do_bcast = false, client_added; unsigned short vid; uint32_t seqno; + int gw_mode; + enum batadv_forw_mode forw_mode; + struct batadv_orig_node *mcast_single_orig = NULL; if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) goto dropped; soft_iface->trans_start = jiffies; vid = batadv_get_vid(skb, 0); - ethhdr = (struct ethhdr *)skb->data; + ethhdr = eth_hdr(skb); switch (ntohs(ethhdr->h_proto)) { case ETH_P_8021Q: - vhdr = (struct vlan_ethhdr *)skb->data; + vhdr = vlan_eth_hdr(skb); if (vhdr->h_vlan_encapsulated_proto != ethertype) break; @@ -193,12 +197,13 @@ static int batadv_interface_tx(struct sk_buff *skb, goto dropped; /* skb->data might have been reallocated by batadv_bla_tx() */ - ethhdr = (struct ethhdr *)skb->data; + 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); + vid, skb->skb_iif, + skb->mark); if (!client_added) goto dropped; } @@ -215,34 +220,47 @@ static int batadv_interface_tx(struct sk_buff *skb, 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)) { - do_bcast = true; + /* if gw mode is off, broadcast every packet */ + if (gw_mode == BATADV_GW_MODE_OFF) { + do_bcast = true; + goto send; + } - switch (atomic_read(&bat_priv->gw_mode)) { - case BATADV_GW_MODE_SERVER: - /* gateway servers should not send dhcp - * requests into the mesh + 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 */ - ret = batadv_gw_is_dhcp_target(skb, &header_len); - if (ret) + 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; - break; - case BATADV_GW_MODE_CLIENT: - /* gateway clients should send dhcp requests - * via unicast to their gateway - */ - ret = batadv_gw_is_dhcp_target(skb, &header_len); - if (ret) + + if (forw_mode == BATADV_FORW_SINGLE) do_bcast = false; - break; - case BATADV_GW_MODE_OFF: - default: - break; } - - /* reminder: ethhdr might have become unusable from here on - * (batadv_gw_is_dhcp_target() might have reallocated skb data) - */ } batadv_skb_set_priority(skb, 0); @@ -264,18 +282,18 @@ static int batadv_interface_tx(struct sk_buff *skb, goto dropped; bcast_packet = (struct batadv_bcast_packet *)skb->data; - bcast_packet->header.version = BATADV_COMPAT_VERSION; - bcast_packet->header.ttl = BATADV_TTL; + bcast_packet->version = BATADV_COMPAT_VERSION; + bcast_packet->ttl = BATADV_TTL; /* batman packet type: broadcast */ - bcast_packet->header.packet_type = BATADV_BCAST; + 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 */ - memcpy(bcast_packet->orig, - primary_if->net_dev->dev_addr, ETH_ALEN); + ether_addr_copy(bcast_packet->orig, + primary_if->net_dev->dev_addr); /* set broadcast sequence number */ seqno = atomic_inc_return(&bat_priv->bcast_seqno); @@ -290,22 +308,26 @@ static int batadv_interface_tx(struct sk_buff *skb, /* unicast packet */ } else { - if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_OFF) { + /* 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; - } - - if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) - goto dropped; - - batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); - - if (is_multicast_ether_addr(ethhdr->h_dest)) ret = batadv_send_skb_via_gw(bat_priv, skb, vid); - else - ret = batadv_send_skb_via_tt(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; } @@ -328,7 +350,7 @@ void batadv_interface_rx(struct net_device *soft_iface, struct sk_buff *skb, struct batadv_hard_iface *recv_if, int hdr_size, struct batadv_orig_node *orig_node) { - struct batadv_header *batadv_header = (struct batadv_header *)skb->data; + struct batadv_bcast_packet *batadv_bcast_packet; struct batadv_priv *bat_priv = netdev_priv(soft_iface); __be16 ethertype = htons(ETH_P_BATMAN); struct vlan_ethhdr *vhdr; @@ -336,7 +358,8 @@ void batadv_interface_rx(struct net_device *soft_iface, unsigned short vid; bool is_bcast; - is_bcast = (batadv_header->packet_type == BATADV_BCAST); + batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; + is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST); /* check if enough space is available for pulling, and pull */ if (!pskb_may_pull(skb, hdr_size)) @@ -345,7 +368,12 @@ void batadv_interface_rx(struct net_device *soft_iface, skb_pull_rcsum(skb, hdr_size); skb_reset_mac_header(skb); - vid = batadv_get_vid(skb, hdr_size); + /* clean the netfilter state now that the batman-adv header has been + * removed + */ + nf_reset(skb); + + vid = batadv_get_vid(skb, 0); ethhdr = eth_hdr(skb); switch (ntohs(ethhdr->h_proto)) { @@ -388,9 +416,23 @@ void batadv_interface_rx(struct net_device *soft_iface, batadv_tt_add_temporary_global_entry(bat_priv, orig_node, ethhdr->h_source, vid); - if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest, - 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; @@ -406,10 +448,15 @@ out: * possibly free it * @softif_vlan: the vlan object to release */ -void batadv_softif_vlan_free_ref(struct batadv_softif_vlan *softif_vlan) +void batadv_softif_vlan_free_ref(struct batadv_softif_vlan *vlan) { - if (atomic_dec_and_test(&softif_vlan->refcount)) - kfree_rcu(softif_vlan, rcu); + if (atomic_dec_and_test(&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); + } } /** @@ -463,6 +510,7 @@ int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) if (!vlan) return -ENOMEM; + vlan->bat_priv = bat_priv; vlan->vid = vid; atomic_set(&vlan->refcount, 1); @@ -474,16 +522,16 @@ int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) return err; } + spin_lock_bh(&bat_priv->softif_vlan_list_lock); + 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); - - spin_lock_bh(&bat_priv->softif_vlan_list_lock); - hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); - spin_unlock_bh(&bat_priv->softif_vlan_list_lock); + BATADV_NULL_IFINDEX, BATADV_NO_MARK); return 0; } @@ -496,18 +544,13 @@ int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv, struct batadv_softif_vlan *vlan) { - spin_lock_bh(&bat_priv->softif_vlan_list_lock); - hlist_del_rcu(&vlan->list); - spin_unlock_bh(&bat_priv->softif_vlan_list_lock); - - batadv_sysfs_del_vlan(bat_priv, 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_free_ref(vlan); } @@ -525,6 +568,8 @@ 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 @@ -534,7 +579,36 @@ static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, vid |= BATADV_VLAN_HAS_TAG; - return batadv_softif_create_vlan(bat_priv, vid); + /* 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_free_ref(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; } /** @@ -627,10 +701,7 @@ static void batadv_softif_destroy_finish(struct work_struct *work) } batadv_sysfs_del_meshif(soft_iface); - - rtnl_lock(); - unregister_netdevice(soft_iface); - rtnl_unlock(); + unregister_netdev(soft_iface); } /** @@ -667,12 +738,20 @@ static int batadv_softif_init_late(struct net_device *dev) #ifdef CONFIG_BATMAN_ADV_DAT atomic_set(&bat_priv->distributed_arp_table, 1); #endif +#ifdef CONFIG_BATMAN_ADV_MCAST + 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); + atomic_set(&bat_priv->hop_penalty, 15); #ifdef CONFIG_BATMAN_ADV_DEBUG atomic_set(&bat_priv->log_level, 0); #endif @@ -691,6 +770,8 @@ static int batadv_softif_init_late(struct net_device *dev) #endif 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)); @@ -835,7 +916,7 @@ static void batadv_softif_init_early(struct net_device *dev) /* generate random address */ eth_hw_addr_random(dev); - SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops); + dev->ethtool_ops = &batadv_ethtool_ops; memset(priv, 0, sizeof(*priv)); } diff --git a/net/batman-adv/soft-interface.h b/net/batman-adv/soft-interface.h index 06fc91ff5a0..dbab22fd89a 100644 --- a/net/batman-adv/soft-interface.h +++ b/net/batman-adv/soft-interface.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_SOFT_INTERFACE_H_ diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c index 6335433310a..fc47baa888c 100644 --- a/net/batman-adv/sysfs.c +++ b/net/batman-adv/sysfs.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2010-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2010-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -31,12 +29,14 @@ static struct net_device *batadv_kobj_to_netdev(struct kobject *obj) { struct device *dev = container_of(obj->parent, struct device, kobj); + return to_net_dev(dev); } static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj) { struct net_device *net_dev = batadv_kobj_to_netdev(obj); + return netdev_priv(net_dev); } @@ -108,7 +108,7 @@ struct batadv_attribute batadv_attr_vlan_##_name = { \ .mode = _mode }, \ .show = _show, \ .store = _store, \ -}; +} /* Use this, if you have customized show and store functions */ #define BATADV_ATTR(_name, _mode, _show, _store) \ @@ -117,7 +117,7 @@ struct batadv_attribute batadv_attr_##_name = { \ .mode = _mode }, \ .show = _show, \ .store = _store, \ -}; +} #define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func) \ ssize_t batadv_store_##_name(struct kobject *kobj, \ @@ -126,6 +126,7 @@ ssize_t batadv_store_##_name(struct kobject *kobj, \ { \ struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \ struct batadv_priv *bat_priv = netdev_priv(net_dev); \ + \ return __batadv_store_bool_attr(buff, count, _post_func, attr, \ &bat_priv->_name, net_dev); \ } @@ -135,6 +136,7 @@ ssize_t batadv_show_##_name(struct kobject *kobj, \ struct attribute *attr, char *buff) \ { \ struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); \ + \ return sprintf(buff, "%s\n", \ atomic_read(&bat_priv->_name) == 0 ? \ "disabled" : "enabled"); \ @@ -157,6 +159,7 @@ ssize_t batadv_store_##_name(struct kobject *kobj, \ { \ struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \ struct batadv_priv *bat_priv = netdev_priv(net_dev); \ + \ return __batadv_store_uint_attr(buff, count, _min, _max, \ _post_func, attr, \ &bat_priv->_name, net_dev); \ @@ -167,6 +170,7 @@ ssize_t batadv_show_##_name(struct kobject *kobj, \ struct attribute *attr, char *buff) \ { \ struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); \ + \ return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name)); \ } \ @@ -190,6 +194,7 @@ ssize_t batadv_store_vlan_##_name(struct kobject *kobj, \ size_t res = __batadv_store_bool_attr(buff, count, _post_func, \ attr, &vlan->_name, \ bat_priv->soft_iface); \ + \ batadv_softif_vlan_free_ref(vlan); \ return res; \ } @@ -204,6 +209,7 @@ ssize_t batadv_show_vlan_##_name(struct kobject *kobj, \ size_t res = sprintf(buff, "%s\n", \ atomic_read(&vlan->_name) == 0 ? \ "disabled" : "enabled"); \ + \ batadv_softif_vlan_free_ref(vlan); \ return res; \ } @@ -326,13 +332,15 @@ static ssize_t batadv_show_bat_algo(struct kobject *kobj, struct attribute *attr, char *buff) { struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); + return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name); } -static void batadv_post_gw_deselect(struct net_device *net_dev) +static void batadv_post_gw_reselect(struct net_device *net_dev) { struct batadv_priv *bat_priv = netdev_priv(net_dev); - batadv_gw_deselect(bat_priv); + + batadv_gw_reselect(bat_priv); } static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr, @@ -408,7 +416,16 @@ static ssize_t batadv_store_gw_mode(struct kobject *kobj, batadv_info(net_dev, "Changing gw mode from: %s to: %s\n", curr_gw_mode_str, buff); - batadv_gw_deselect(bat_priv); + /* Invoking batadv_gw_reselect() is not enough to really de-select the + * current GW. It will only instruct the gateway client code to perform + * a re-election the next time that this is needed. + * + * When gw client mode is being switched off the current GW must be + * de-selected explicitly otherwise no GW_ADD uevent is thrown on + * client mode re-activation. This is operation is performed in + * batadv_gw_check_client_stop(). + */ + batadv_gw_reselect(bat_priv); /* always call batadv_gw_check_client_stop() before changing the gateway * state */ @@ -443,6 +460,74 @@ static ssize_t batadv_store_gw_bwidth(struct kobject *kobj, return batadv_gw_bandwidth_set(net_dev, buff, count); } +/** + * batadv_show_isolation_mark - print the current isolation mark/mask + * @kobj: kobject representing the private mesh sysfs directory + * @attr: the batman-adv attribute the user is interacting with + * @buff: the buffer that will contain the data to send back to the user + * + * Returns the number of bytes written into 'buff' on success or a negative + * error code in case of failure + */ +static ssize_t batadv_show_isolation_mark(struct kobject *kobj, + struct attribute *attr, char *buff) +{ + struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); + + return sprintf(buff, "%#.8x/%#.8x\n", bat_priv->isolation_mark, + bat_priv->isolation_mark_mask); +} + +/** + * batadv_store_isolation_mark - parse and store the isolation mark/mask entered + * by the user + * @kobj: kobject representing the private mesh sysfs directory + * @attr: the batman-adv attribute the user is interacting with + * @buff: the buffer containing the user data + * @count: number of bytes in the buffer + * + * Returns 'count' on success or a negative error code in case of failure + */ +static ssize_t batadv_store_isolation_mark(struct kobject *kobj, + struct attribute *attr, char *buff, + size_t count) +{ + struct net_device *net_dev = batadv_kobj_to_netdev(kobj); + struct batadv_priv *bat_priv = netdev_priv(net_dev); + uint32_t mark, mask; + char *mask_ptr; + + /* parse the mask if it has been specified, otherwise assume the mask is + * the biggest possible + */ + mask = 0xFFFFFFFF; + mask_ptr = strchr(buff, '/'); + if (mask_ptr) { + *mask_ptr = '\0'; + mask_ptr++; + + /* the mask must be entered in hex base as it is going to be a + * bitmask and not a prefix length + */ + if (kstrtou32(mask_ptr, 16, &mask) < 0) + return -EINVAL; + } + + /* the mark can be entered in any base */ + if (kstrtou32(buff, 0, &mark) < 0) + return -EINVAL; + + bat_priv->isolation_mark_mask = mask; + /* erase bits not covered by the mask */ + bat_priv->isolation_mark = mark & bat_priv->isolation_mark_mask; + + batadv_info(net_dev, + "New skb mark for extended isolation: %#.8x/%#.8x\n", + bat_priv->isolation_mark, bat_priv->isolation_mark_mask); + + return count; +} + BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL); BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL); #ifdef CONFIG_BATMAN_ADV_BLA @@ -461,9 +546,12 @@ BATADV_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * BATADV_JITTER, BATADV_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, BATADV_TQ_MAX_VALUE, NULL); BATADV_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, BATADV_TQ_MAX_VALUE, - batadv_post_gw_deselect); + batadv_post_gw_reselect); static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth, batadv_store_gw_bwidth); +#ifdef CONFIG_BATMAN_ADV_MCAST +BATADV_ATTR_SIF_BOOL(multicast_mode, S_IRUGO | S_IWUSR, NULL); +#endif #ifdef CONFIG_BATMAN_ADV_DEBUG BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, BATADV_DBG_ALL, NULL); #endif @@ -471,6 +559,8 @@ BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, BATADV_DBG_ALL, NULL); BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR, batadv_nc_status_update); #endif +static BATADV_ATTR(isolation_mark, S_IRUGO | S_IWUSR, + batadv_show_isolation_mark, batadv_store_isolation_mark); static struct batadv_attribute *batadv_mesh_attrs[] = { &batadv_attr_aggregated_ogms, @@ -481,6 +571,9 @@ static struct batadv_attribute *batadv_mesh_attrs[] = { #ifdef CONFIG_BATMAN_ADV_DAT &batadv_attr_distributed_arp_table, #endif +#ifdef CONFIG_BATMAN_ADV_MCAST + &batadv_attr_multicast_mode, +#endif &batadv_attr_fragmentation, &batadv_attr_routing_algo, &batadv_attr_gw_mode, @@ -494,6 +587,7 @@ static struct batadv_attribute *batadv_mesh_attrs[] = { #ifdef CONFIG_BATMAN_ADV_NC &batadv_attr_network_coding, #endif + &batadv_attr_isolation_mark, NULL, }; diff --git a/net/batman-adv/sysfs.h b/net/batman-adv/sysfs.h index c7d725de50a..b715b60db7c 100644 --- a/net/batman-adv/sysfs.h +++ b/net/batman-adv/sysfs.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2010-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2010-2014 B.A.T.M.A.N. contributors: * * Marek Lindner * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_SYSFS_H_ diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 4add57d4857..5f59e7f899a 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich, Antonio Quartulli * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -26,6 +24,7 @@ #include "originator.h" #include "routing.h" #include "bridge_loop_avoidance.h" +#include "multicast.h" #include <linux/crc32c.h> @@ -51,7 +50,7 @@ static int batadv_compare_tt(const struct hlist_node *node, const void *data2) const void *data1 = container_of(node, struct batadv_tt_common_entry, hash_entry); - return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); + return batadv_compare_eth(data1, data2); } /** @@ -98,7 +97,7 @@ batadv_tt_hash_find(struct batadv_hashtable *hash, const uint8_t *addr, if (!hash) return NULL; - memcpy(to_search.addr, addr, ETH_ALEN); + ether_addr_copy(to_search.addr, addr); to_search.vid = vid; index = batadv_choose_tt(&to_search, hash->size); @@ -194,6 +193,31 @@ batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) } } +/** + * batadv_tt_global_hash_count - count the number of orig entries + * @hash: hash table containing the tt entries + * @addr: the mac address of the client to count entries for + * @vid: VLAN identifier + * + * Return the number of originators advertising the given address/data + * (excluding ourself). + */ +int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, + const uint8_t *addr, unsigned short vid) +{ + struct batadv_tt_global_entry *tt_global_entry; + int count; + + tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); + if (!tt_global_entry) + return 0; + + count = atomic_read(&tt_global_entry->orig_list_count); + batadv_tt_global_entry_free_ref(tt_global_entry); + + return count; +} + static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) { struct batadv_tt_orig_list_entry *orig_entry; @@ -333,8 +357,9 @@ static void batadv_tt_local_event(struct batadv_priv *bat_priv, return; tt_change_node->change.flags = flags; - tt_change_node->change.reserved = 0; - memcpy(tt_change_node->change.addr, common->addr, ETH_ALEN); + memset(tt_change_node->change.reserved, 0, + sizeof(tt_change_node->change.reserved)); + ether_addr_copy(tt_change_node->change.addr, common->addr); tt_change_node->change.vid = htons(common->vid); del_op_requested = flags & BATADV_TT_CLIENT_DEL; @@ -475,27 +500,33 @@ static void batadv_tt_global_free(struct batadv_priv *bat_priv, * @vid: VLAN identifier * @ifindex: index of the interface where the client is connected to (useful to * identify wireless clients) + * @mark: the value contained in the skb->mark field of the received packet (if + * any) * * Returns true if the client was successfully added, false otherwise. */ bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, - unsigned short vid, int ifindex) + unsigned short vid, int ifindex, uint32_t mark) { struct batadv_priv *bat_priv = netdev_priv(soft_iface); struct batadv_tt_local_entry *tt_local; - struct batadv_tt_global_entry *tt_global; + struct batadv_tt_global_entry *tt_global = NULL; + struct batadv_softif_vlan *vlan; struct net_device *in_dev = NULL; struct hlist_head *head; struct batadv_tt_orig_list_entry *orig_entry; int hash_added, table_size, packet_size_max; bool ret = false, roamed_back = false; uint8_t remote_flags; + uint32_t match_mark; if (ifindex != BATADV_NULL_IFINDEX) in_dev = dev_get_by_index(&init_net, ifindex); tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); - tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); + + if (!is_multicast_ether_addr(addr)) + tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); if (tt_local) { tt_local->last_seen = jiffies; @@ -542,12 +573,15 @@ bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, if (!tt_local) goto out; + /* increase the refcounter of the related vlan */ + vlan = batadv_softif_vlan_get(bat_priv, vid); + batadv_dbg(BATADV_DBG_TT, bat_priv, "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", addr, BATADV_PRINT_VID(vid), (uint8_t)atomic_read(&bat_priv->tt.vn)); - memcpy(tt_local->common.addr, addr, ETH_ALEN); + ether_addr_copy(tt_local->common.addr, addr); /* The local entry has to be marked as NEW to avoid to send it in * a full table response going out before the next ttvn increment * (consistency check) @@ -560,8 +594,11 @@ bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, tt_local->last_seen = jiffies; tt_local->common.added_at = tt_local->last_seen; - /* the batman interface mac address should never be purged */ - if (batadv_compare_eth(addr, soft_iface->dev_addr)) + /* the batman interface mac and multicast addresses should never be + * purged + */ + if (batadv_compare_eth(addr, soft_iface->dev_addr) || + is_multicast_ether_addr(addr)) tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, @@ -571,6 +608,7 @@ bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, if (unlikely(hash_added != 0)) { /* remove the reference for the hash */ batadv_tt_local_entry_free_ref(tt_local); + batadv_softif_vlan_free_ref(vlan); goto out; } @@ -614,6 +652,17 @@ check_roaming: else tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; + /* check the mark in the skb: if it's equal to the configured + * isolation_mark, it means the packet is coming from an isolated + * non-mesh client + */ + match_mark = (mark & bat_priv->isolation_mark_mask); + if (bat_priv->isolation_mark_mask && + match_mark == bat_priv->isolation_mark) + tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; + else + tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; + /* if any "dynamic" flag has been modified, resend an ADD event for this * entry so that all the nodes can get the new flags */ @@ -874,7 +923,7 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) seq_printf(seq, "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); - seq_printf(seq, " %-13s %s %-7s %-9s (%-10s)\n", "Client", "VID", + seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", "Flags", "Last seen", "CRC"); for (i = 0; i < hash->size; i++) { @@ -902,7 +951,7 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) } seq_printf(seq, - " * %pM %4i [%c%c%c%c%c] %3u.%03u (%#.8x)\n", + " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", tt_common_entry->addr, BATADV_PRINT_VID(tt_common_entry->vid), (tt_common_entry->flags & @@ -914,6 +963,8 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) BATADV_TT_CLIENT_PENDING ? 'X' : '.'), (tt_common_entry->flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), + (tt_common_entry->flags & + BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), no_purge ? 0 : last_seen_secs, no_purge ? 0 : last_seen_msecs, vlan->tt.crc); @@ -963,6 +1014,7 @@ uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, { struct batadv_tt_local_entry *tt_local_entry; uint16_t flags, curr_flags = BATADV_NO_FLAGS; + struct batadv_softif_vlan *vlan; tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); if (!tt_local_entry) @@ -993,6 +1045,11 @@ uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, hlist_del_rcu(&tt_local_entry->common.hash_entry); batadv_tt_local_entry_free_ref(tt_local_entry); + /* decrease the reference held for this vlan */ + vlan = batadv_softif_vlan_get(bat_priv, vid); + batadv_softif_vlan_free_ref(vlan); + batadv_softif_vlan_free_ref(vlan); + out: if (tt_local_entry) batadv_tt_local_entry_free_ref(tt_local_entry); @@ -1065,6 +1122,7 @@ static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) spinlock_t *list_lock; /* protects write access to the hash lists */ struct batadv_tt_common_entry *tt_common_entry; struct batadv_tt_local_entry *tt_local; + struct batadv_softif_vlan *vlan; struct hlist_node *node_tmp; struct hlist_head *head; uint32_t i; @@ -1085,6 +1143,13 @@ static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) tt_local = container_of(tt_common_entry, struct batadv_tt_local_entry, common); + + /* decrease the reference held for this vlan */ + vlan = batadv_softif_vlan_get(bat_priv, + tt_common_entry->vid); + batadv_softif_vlan_free_ref(vlan); + batadv_softif_vlan_free_ref(vlan); + batadv_tt_local_entry_free_ref(tt_local); } spin_unlock_bh(list_lock); @@ -1204,6 +1269,8 @@ batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, hlist_add_head_rcu(&orig_entry->list, &tt_global->orig_list); spin_unlock_bh(&tt_global->list_lock); + atomic_inc(&tt_global->orig_list_count); + out: if (orig_entry) batadv_tt_orig_list_entry_free_ref(orig_entry); @@ -1262,7 +1329,7 @@ static bool batadv_tt_global_add(struct batadv_priv *bat_priv, goto out; common = &tt_global_entry->common; - memcpy(common->addr, tt_addr, ETH_ALEN); + ether_addr_copy(common->addr, tt_addr); common->vid = vid; common->flags = flags; @@ -1277,6 +1344,7 @@ static bool batadv_tt_global_add(struct batadv_priv *bat_priv, common->added_at = jiffies; INIT_HLIST_HEAD(&tt_global_entry->orig_list); + atomic_set(&tt_global_entry->orig_list_count, 0); spin_lock_init(&tt_global_entry->list_lock); hash_added = batadv_hash_add(bat_priv->tt.global_hash, @@ -1346,6 +1414,11 @@ add_orig_entry: ret = true; out_remove: + /* Do not remove multicast addresses from the local hash on + * global additions + */ + if (is_multicast_ether_addr(tt_addr)) + goto out; /* remove address from local hash if present */ local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, @@ -1367,7 +1440,8 @@ out: return ret; } -/* batadv_transtable_best_orig - Get best originator list entry from tt entry +/** + * batadv_transtable_best_orig - Get best originator list entry from tt entry * @bat_priv: the bat priv with all the soft interface information * @tt_global_entry: global translation table entry to be analyzed * @@ -1385,12 +1459,14 @@ batadv_transtable_best_orig(struct batadv_priv *bat_priv, head = &tt_global_entry->orig_list; hlist_for_each_entry_rcu(orig_entry, head, list) { - router = batadv_orig_node_get_router(orig_entry->orig_node); + router = batadv_orig_router_get(orig_entry->orig_node, + BATADV_IF_DEFAULT); if (!router) continue; if (best_router && - bao->bat_neigh_cmp(router, best_router) <= 0) { + bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, + best_router, BATADV_IF_DEFAULT) <= 0) { batadv_neigh_node_free_ref(router); continue; } @@ -1409,8 +1485,9 @@ batadv_transtable_best_orig(struct batadv_priv *bat_priv, return best_entry; } -/* batadv_tt_global_print_entry - print all orig nodes who announce the address - * for this global entry +/** + * batadv_tt_global_print_entry - print all orig nodes who announce the address + * for this global entry * @bat_priv: the bat priv with all the soft interface information * @tt_global_entry: global translation table entry to be printed * @seq: debugfs table seq_file struct @@ -1446,13 +1523,14 @@ batadv_tt_global_print_entry(struct batadv_priv *bat_priv, last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); seq_printf(seq, - " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", + " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", '*', tt_global_entry->common.addr, BATADV_PRINT_VID(tt_global_entry->common.vid), best_entry->ttvn, best_entry->orig_node->orig, last_ttvn, vlan->tt.crc, (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), + (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); batadv_orig_node_vlan_free_ref(vlan); @@ -1477,13 +1555,14 @@ print_list: last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); seq_printf(seq, - " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", + " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", '+', tt_global_entry->common.addr, BATADV_PRINT_VID(tt_global_entry->common.vid), orig_entry->ttvn, orig_entry->orig_node->orig, last_ttvn, vlan->tt.crc, (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), + (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); batadv_orig_node_vlan_free_ref(vlan); @@ -1531,6 +1610,25 @@ out: return 0; } +/** + * batadv_tt_global_del_orig_entry - remove and free an orig_entry + * @tt_global_entry: the global entry to remove the orig_entry from + * @orig_entry: the orig entry to remove and free + * + * Remove an orig_entry from its list in the given tt_global_entry and + * free this orig_entry afterwards. + */ +static void +batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, + struct batadv_tt_orig_list_entry *orig_entry) +{ + batadv_tt_global_size_dec(orig_entry->orig_node, + tt_global_entry->common.vid); + atomic_dec(&tt_global_entry->orig_list_count); + hlist_del_rcu(&orig_entry->list); + batadv_tt_orig_list_entry_free_ref(orig_entry); +} + /* deletes the orig list of a tt_global_entry */ static void batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) @@ -1541,20 +1639,26 @@ batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) spin_lock_bh(&tt_global_entry->list_lock); head = &tt_global_entry->orig_list; - hlist_for_each_entry_safe(orig_entry, safe, head, list) { - hlist_del_rcu(&orig_entry->list); - batadv_tt_global_size_dec(orig_entry->orig_node, - tt_global_entry->common.vid); - batadv_tt_orig_list_entry_free_ref(orig_entry); - } + hlist_for_each_entry_safe(orig_entry, safe, head, list) + batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); spin_unlock_bh(&tt_global_entry->list_lock); } +/** + * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry + * @bat_priv: the bat priv with all the soft interface information + * @tt_global_entry: the global entry to remove the orig_node from + * @orig_node: the originator announcing the client + * @message: message to append to the log on deletion + * + * Remove the given orig_node and its according orig_entry from the given + * global tt entry. + */ static void -batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, - struct batadv_tt_global_entry *tt_global_entry, - struct batadv_orig_node *orig_node, - const char *message) +batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, + struct batadv_tt_global_entry *tt_global_entry, + struct batadv_orig_node *orig_node, + const char *message) { struct hlist_head *head; struct hlist_node *safe; @@ -1571,10 +1675,8 @@ batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, orig_node->orig, tt_global_entry->common.addr, BATADV_PRINT_VID(vid), message); - hlist_del_rcu(&orig_entry->list); - batadv_tt_global_size_dec(orig_node, - tt_global_entry->common.vid); - batadv_tt_orig_list_entry_free_ref(orig_entry); + batadv_tt_global_del_orig_entry(tt_global_entry, + orig_entry); } } spin_unlock_bh(&tt_global_entry->list_lock); @@ -1616,8 +1718,8 @@ batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, /* there is another entry, we can simply delete this * one and can still use the other one. */ - batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, - orig_node, message); + batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, + orig_node, message); } /** @@ -1643,8 +1745,8 @@ static void batadv_tt_global_del(struct batadv_priv *bat_priv, goto out; if (!roaming) { - batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, - orig_node, message); + batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, + orig_node, message); if (hlist_empty(&tt_global_entry->orig_list)) batadv_tt_global_free(bat_priv, tt_global_entry, @@ -1727,8 +1829,8 @@ void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, struct batadv_tt_global_entry, common); - batadv_tt_global_del_orig_entry(bat_priv, tt_global, - orig_node, message); + batadv_tt_global_del_orig_node(bat_priv, tt_global, + orig_node, message); if (hlist_empty(&tt_global->orig_list)) { vid = tt_global->common.vid; @@ -1742,7 +1844,7 @@ void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, } spin_unlock_bh(list_lock); } - orig_node->tt_initialised = false; + orig_node->capa_initialized &= ~BATADV_ORIG_CAPA_HAS_TT; } static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, @@ -1852,6 +1954,11 @@ _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) ret = true; + /* check if the two clients are marked as isolated */ + if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && + tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) + ret = true; + return ret; } @@ -1878,19 +1985,8 @@ struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, struct batadv_tt_global_entry *tt_global_entry = NULL; struct batadv_orig_node *orig_node = NULL; struct batadv_tt_orig_list_entry *best_entry; - bool ap_isolation_enabled = false; - struct batadv_softif_vlan *vlan; - - /* if the AP isolation is requested on a VLAN, then check for its - * setting in the proper VLAN private data structure - */ - vlan = batadv_softif_vlan_get(bat_priv, vid); - if (vlan) { - ap_isolation_enabled = atomic_read(&vlan->ap_isolation); - batadv_softif_vlan_free_ref(vlan); - } - if (src && ap_isolation_enabled) { + if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); if (!tt_local_entry || (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) @@ -1960,6 +2056,7 @@ static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, struct hlist_head *head; uint32_t i, crc_tmp, crc = 0; uint8_t flags; + __be16 tmp_vid; for (i = 0; i < hash->size; i++) { head = &hash->table[i]; @@ -1996,8 +2093,11 @@ static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, orig_node)) continue; - crc_tmp = crc32c(0, &tt_common->vid, - sizeof(tt_common->vid)); + /* use network order to read the VID: this ensures that + * every node reads the bytes in the same order. + */ + tmp_vid = htons(tt_common->vid); + crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); /* compute the CRC on flags that have to be kept in sync * among nodes @@ -2031,6 +2131,7 @@ static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, struct hlist_head *head; uint32_t i, crc_tmp, crc = 0; uint8_t flags; + __be16 tmp_vid; for (i = 0; i < hash->size; i++) { head = &hash->table[i]; @@ -2049,8 +2150,11 @@ static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, if (tt_common->flags & BATADV_TT_CLIENT_NEW) continue; - crc_tmp = crc32c(0, &tt_common->vid, - sizeof(tt_common->vid)); + /* use network order to read the VID: this ensures that + * every node reads the bytes in the same order. + */ + tmp_vid = htons(tt_common->vid); + crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); /* compute the CRC on flags that have to be kept in sync * among nodes @@ -2137,7 +2241,7 @@ batadv_new_tt_req_node(struct batadv_priv *bat_priv, if (!tt_req_node) goto unlock; - memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); + ether_addr_copy(tt_req_node->addr, orig_node->orig); tt_req_node->issued_at = jiffies; list_add(&tt_req_node->list, &bat_priv->tt.req_list); @@ -2217,11 +2321,11 @@ static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) continue; - memcpy(tt_change->addr, tt_common_entry->addr, - ETH_ALEN); + ether_addr_copy(tt_change->addr, tt_common_entry->addr); tt_change->flags = tt_common_entry->flags; tt_change->vid = htons(tt_common_entry->vid); - tt_change->reserved = 0; + memset(tt_change->reserved, 0, + sizeof(tt_change->reserved)); tt_num_entries++; tt_change++; @@ -2246,6 +2350,7 @@ static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, { struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; struct batadv_orig_node_vlan *vlan; + uint32_t crc; int i; /* check if each received CRC matches the locally stored one */ @@ -2265,7 +2370,10 @@ static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, if (!vlan) return false; - if (vlan->tt.crc != ntohl(tt_vlan_tmp->crc)) + crc = vlan->tt.crc; + batadv_orig_node_vlan_free_ref(vlan); + + if (crc != ntohl(tt_vlan_tmp->crc)) return false; } @@ -2696,7 +2804,7 @@ static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, return; } } - orig_node->tt_initialised = true; + orig_node->capa_initialized |= BATADV_ORIG_CAPA_HAS_TT; } static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, @@ -2904,7 +3012,7 @@ static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, tt_roam_node->first_time = jiffies; atomic_set(&tt_roam_node->counter, BATADV_ROAMING_MAX_COUNT - 1); - memcpy(tt_roam_node->addr, client, ETH_ALEN); + ether_addr_copy(tt_roam_node->addr, client); list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); ret = true; @@ -3050,6 +3158,7 @@ static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) struct batadv_hashtable *hash = bat_priv->tt.local_hash; struct batadv_tt_common_entry *tt_common; struct batadv_tt_local_entry *tt_local; + struct batadv_softif_vlan *vlan; struct hlist_node *node_tmp; struct hlist_head *head; spinlock_t *list_lock; /* protects write access to the hash lists */ @@ -3078,6 +3187,12 @@ static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) tt_local = container_of(tt_common, struct batadv_tt_local_entry, common); + + /* decrease the reference held for this vlan */ + vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid); + batadv_softif_vlan_free_ref(vlan); + batadv_softif_vlan_free_ref(vlan); + batadv_tt_local_entry_free_ref(tt_local); } spin_unlock_bh(list_lock); @@ -3093,6 +3208,9 @@ static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) */ static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) { + /* Update multicast addresses in local translation table */ + batadv_mcast_mla_update(bat_priv); + if (atomic_read(&bat_priv->tt.local_changes) < 1) { if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) batadv_tt_tvlv_container_update(bat_priv); @@ -3183,13 +3301,15 @@ static void batadv_tt_update_orig(struct batadv_priv *bat_priv, uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); struct batadv_tvlv_tt_vlan_data *tt_vlan; bool full_table = true; + bool has_tt_init; tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; + has_tt_init = orig_node->capa_initialized & BATADV_ORIG_CAPA_HAS_TT; + /* orig table not initialised AND first diff is in the OGM OR the ttvn * increased by one -> we can apply the attached changes */ - if ((!orig_node->tt_initialised && ttvn == 1) || - ttvn - orig_ttvn == 1) { + if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { /* the OGM could not contain the changes due to their size or * because they have already been sent BATADV_TT_OGM_APPEND_MAX * times. @@ -3202,7 +3322,6 @@ static void batadv_tt_update_orig(struct batadv_priv *bat_priv, spin_lock_bh(&orig_node->tt_lock); - tt_change = (struct batadv_tvlv_tt_change *)tt_buff; batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, ttvn, tt_change); @@ -3230,7 +3349,7 @@ static void batadv_tt_update_orig(struct batadv_priv *bat_priv, /* if we missed more than one change or our tables are not * in sync anymore -> request fresh tt data */ - if (!orig_node->tt_initialised || ttvn != orig_ttvn || + if (!has_tt_init || ttvn != orig_ttvn || !batadv_tt_global_check_crc(orig_node, tt_vlan, tt_num_vlan)) { request_table: @@ -3565,3 +3684,29 @@ int batadv_tt_init(struct batadv_priv *bat_priv) return 1; } + +/** + * batadv_tt_global_is_isolated - check if a client is marked as isolated + * @bat_priv: the bat priv with all the soft interface information + * @addr: the mac address of the client + * @vid: the identifier of the VLAN where this client is connected + * + * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false + * otherwise + */ +bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, + const uint8_t *addr, unsigned short vid) +{ + struct batadv_tt_global_entry *tt; + bool ret; + + tt = batadv_tt_global_hash_find(bat_priv, addr, vid); + if (!tt) + return false; + + ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; + + batadv_tt_global_entry_free_ref(tt); + + return ret; +} diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h index 026b1ffa674..ad84d7b89e3 100644 --- a/net/batman-adv/translation-table.h +++ b/net/batman-adv/translation-table.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich, Antonio Quartulli * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ @@ -22,7 +20,7 @@ int batadv_tt_init(struct batadv_priv *bat_priv); bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, - unsigned short vid, int ifindex); + unsigned short vid, int ifindex, uint32_t mark); uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, const uint8_t *addr, unsigned short vid, const char *message, bool roaming); @@ -31,6 +29,8 @@ int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset); void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, int32_t match_vid, const char *message); +int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, + const uint8_t *addr, unsigned short vid); struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, const uint8_t *src, const uint8_t *addr, @@ -50,5 +50,7 @@ bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, const unsigned char *addr, unsigned short vid); +bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, + const uint8_t *addr, unsigned short vid); #endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */ diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index 91dd369b0ff..8854c05622a 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_TYPES_H_ @@ -26,8 +24,9 @@ #ifdef CONFIG_BATMAN_ADV_DAT -/* batadv_dat_addr_t is the type used for all DHT addresses. If it is changed, - * BATADV_DAT_ADDR_MAX is changed as well. +/** + * batadv_dat_addr_t - it is the type used for all DHT addresses. If it is + * changed, BATADV_DAT_ADDR_MAX is changed as well. * * *Please be careful: batadv_dat_addr_t must be UNSIGNED* */ @@ -36,6 +35,18 @@ #endif /* CONFIG_BATMAN_ADV_DAT */ /** + * enum batadv_dhcp_recipient - dhcp destination + * @BATADV_DHCP_NO: packet is not a dhcp message + * @BATADV_DHCP_TO_SERVER: dhcp message is directed to a server + * @BATADV_DHCP_TO_CLIENT: dhcp message is directed to a client + */ +enum batadv_dhcp_recipient { + BATADV_DHCP_NO = 0, + BATADV_DHCP_TO_SERVER, + BATADV_DHCP_TO_CLIENT, +}; + +/** * BATADV_TT_REMOTE_MASK - bitmask selecting the flags that are sent over the * wire only */ @@ -74,6 +85,7 @@ struct batadv_hard_iface_bat_iv { * @rcu: struct used for freeing in an RCU-safe manner * @bat_iv: BATMAN IV specific per hard interface data * @cleanup_work: work queue callback item for hard interface deinit + * @debug_dir: dentry for nc subdir in batman-adv directory in debugfs */ struct batadv_hard_iface { struct list_head list; @@ -88,6 +100,29 @@ struct batadv_hard_iface { struct rcu_head rcu; struct batadv_hard_iface_bat_iv bat_iv; struct work_struct cleanup_work; + struct dentry *debug_dir; +}; + +/** + * struct batadv_orig_ifinfo - originator info per outgoing interface + * @list: list node for orig_node::ifinfo_list + * @if_outgoing: pointer to outgoing hard interface + * @router: router that should be used to reach this originator + * @last_real_seqno: last and best known sequence number + * @last_ttl: ttl of last received packet + * @batman_seqno_reset: time when the batman seqno window was reset + * @refcount: number of contexts the object is used + * @rcu: struct used for freeing in an RCU-safe manner + */ +struct batadv_orig_ifinfo { + struct hlist_node list; + struct batadv_hard_iface *if_outgoing; + struct batadv_neigh_node __rcu *router; /* rcu protected pointer */ + uint32_t last_real_seqno; + uint8_t last_ttl; + unsigned long batman_seqno_reset; + atomic_t refcount; + struct rcu_head rcu; }; /** @@ -129,7 +164,7 @@ struct batadv_vlan_tt { }; /** - * batadv_orig_node_vlan - VLAN specific data per orig_node + * struct batadv_orig_node_vlan - VLAN specific data per orig_node * @vid: the VLAN identifier * @tt: VLAN specific TT attributes * @list: list node for orig_node::vlan_list @@ -165,36 +200,36 @@ struct batadv_orig_bat_iv { * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh * @orig: originator ethernet address * @primary_addr: hosts primary interface address - * @router: router that should be used to reach this originator + * @ifinfo_list: list for routers per outgoing interface + * @last_bonding_candidate: pointer to last ifinfo of last used router * @batadv_dat_addr_t: address of the orig node in the distributed hash * @last_seen: time when last packet from this node was received * @bcast_seqno_reset: time when the broadcast seqno window was reset - * @batman_seqno_reset: time when the batman seqno window was reset + * @mcast_flags: multicast flags announced by the orig node + * @mcast_want_all_unsnoop_node: a list node for the + * mcast.want_all_unsnoopables list + * @mcast_want_all_ipv4_node: a list node for the mcast.want_all_ipv4 list + * @mcast_want_all_ipv6_node: a list node for the mcast.want_all_ipv6 list * @capabilities: announced capabilities of this originator + * @capa_initialized: bitfield to remember whether a capability was initialized * @last_ttvn: last seen translation table version number * @tt_buff: last tt changeset this node received from the orig node * @tt_buff_len: length of the last tt changeset this node received from the * orig node * @tt_buff_lock: lock that protects tt_buff and tt_buff_len - * @tt_initialised: bool keeping track of whether or not this node have received - * any translation table information from the orig node yet * @tt_lock: prevents from updating the table while reading it. Table update is * made up by two operations (data structure update and metdata -CRC/TTVN- * recalculation) and they have to be executed atomically in order to avoid * another thread to read the table/metadata between those. - * @last_real_seqno: last and best known sequence number - * @last_ttl: ttl of last received packet * @bcast_bits: bitfield containing the info which payload broadcast originated * from this orig node this host already has seen (relative to * last_bcast_seqno) * @last_bcast_seqno: last broadcast sequence number received by this host * @neigh_list: list of potential next hop neighbor towards this orig node - * @neigh_list_lock: lock protecting neigh_list, router and bonding_list + * @neigh_list_lock: lock protecting neigh_list and router * @hash_entry: hlist node for batadv_priv::orig_hash * @bat_priv: pointer to soft_iface this orig node belongs to * @bcast_seqno_lock: lock protecting bcast_bits & last_bcast_seqno - * @bond_candidates: how many candidates are available - * @bond_list: list of bonding candidates * @refcount: number of contexts the object is used * @rcu: struct used for freeing in an RCU-safe manner * @in_coding_list: list of nodes this orig can hear @@ -210,34 +245,36 @@ struct batadv_orig_bat_iv { struct batadv_orig_node { uint8_t orig[ETH_ALEN]; uint8_t primary_addr[ETH_ALEN]; - struct batadv_neigh_node __rcu *router; /* rcu protected pointer */ + struct hlist_head ifinfo_list; + struct batadv_orig_ifinfo *last_bonding_candidate; #ifdef CONFIG_BATMAN_ADV_DAT batadv_dat_addr_t dat_addr; #endif unsigned long last_seen; unsigned long bcast_seqno_reset; - unsigned long batman_seqno_reset; +#ifdef CONFIG_BATMAN_ADV_MCAST + uint8_t mcast_flags; + struct hlist_node mcast_want_all_unsnoopables_node; + struct hlist_node mcast_want_all_ipv4_node; + struct hlist_node mcast_want_all_ipv6_node; +#endif uint8_t capabilities; + uint8_t capa_initialized; atomic_t last_ttvn; unsigned char *tt_buff; int16_t tt_buff_len; spinlock_t tt_buff_lock; /* protects tt_buff & tt_buff_len */ - bool tt_initialised; /* prevents from changing the table while reading it */ spinlock_t tt_lock; - uint32_t last_real_seqno; - uint8_t last_ttl; DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE); uint32_t last_bcast_seqno; struct hlist_head neigh_list; - /* neigh_list_lock protects: neigh_list, router & bonding_list */ + /* neigh_list_lock protects: neigh_list and router */ spinlock_t neigh_list_lock; struct hlist_node hash_entry; struct batadv_priv *bat_priv; /* bcast_seqno_lock protects: bcast_bits & last_bcast_seqno */ spinlock_t bcast_seqno_lock; - atomic_t bond_candidates; - struct list_head bond_list; atomic_t refcount; struct rcu_head rcu; #ifdef CONFIG_BATMAN_ADV_NC @@ -256,10 +293,15 @@ struct batadv_orig_node { * enum batadv_orig_capabilities - orig node capabilities * @BATADV_ORIG_CAPA_HAS_DAT: orig node has distributed arp table enabled * @BATADV_ORIG_CAPA_HAS_NC: orig node has network coding enabled + * @BATADV_ORIG_CAPA_HAS_TT: orig node has tt capability + * @BATADV_ORIG_CAPA_HAS_MCAST: orig node has some multicast capability + * (= orig node announces a tvlv of type BATADV_TVLV_MCAST) */ enum batadv_orig_capabilities { BATADV_ORIG_CAPA_HAS_DAT = BIT(0), BATADV_ORIG_CAPA_HAS_NC = BIT(1), + BATADV_ORIG_CAPA_HAS_TT = BIT(2), + BATADV_ORIG_CAPA_HAS_MCAST = BIT(3), }; /** @@ -283,49 +325,64 @@ struct batadv_gw_node { }; /** - * struct batadv_neigh_bat_iv - B.A.T.M.A.N. IV specific structure for single - * hop neighbors + * struct batadv_neigh_node - structure for single hops neighbors + * @list: list node for batadv_orig_node::neigh_list + * @orig_node: pointer to corresponding orig_node + * @addr: the MAC address of the neighboring interface + * @ifinfo_list: list for routing metrics per outgoing interface + * @ifinfo_lock: lock protecting private ifinfo members and list + * @if_incoming: pointer to incoming hard interface + * @last_seen: when last packet via this neighbor was received + * @last_ttl: last received ttl from this neigh node + * @rcu: struct used for freeing in an RCU-safe manner + * @bat_iv: B.A.T.M.A.N. IV private structure + */ +struct batadv_neigh_node { + struct hlist_node list; + struct batadv_orig_node *orig_node; + uint8_t addr[ETH_ALEN]; + struct hlist_head ifinfo_list; + spinlock_t ifinfo_lock; /* protects ifinfo_list and its members */ + struct batadv_hard_iface *if_incoming; + unsigned long last_seen; + atomic_t refcount; + struct rcu_head rcu; +}; + +/** + * struct batadv_neigh_ifinfo_bat_iv - neighbor information per outgoing + * interface for BATMAN IV * @tq_recv: ring buffer of received TQ values from this neigh node * @tq_index: ring buffer index * @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv) * @real_bits: bitfield containing the number of OGMs received from this neigh * node (relative to orig_node->last_real_seqno) * @real_packet_count: counted result of real_bits - * @lq_update_lock: lock protecting tq_recv & tq_index */ -struct batadv_neigh_bat_iv { +struct batadv_neigh_ifinfo_bat_iv { uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE]; uint8_t tq_index; uint8_t tq_avg; DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE); uint8_t real_packet_count; - spinlock_t lq_update_lock; /* protects tq_recv & tq_index */ }; /** - * struct batadv_neigh_node - structure for single hops neighbors - * @list: list node for batadv_orig_node::neigh_list - * @orig_node: pointer to corresponding orig_node - * @addr: the MAC address of the neighboring interface - * @if_incoming: pointer to incoming hard interface - * @last_seen: when last packet via this neighbor was received + * struct batadv_neigh_ifinfo - neighbor information per outgoing interface + * @list: list node for batadv_neigh_node::ifinfo_list + * @if_outgoing: pointer to outgoing hard interface + * @bat_iv: B.A.T.M.A.N. IV private structure * @last_ttl: last received ttl from this neigh node - * @bonding_list: list node for batadv_orig_node::bond_list * @refcount: number of contexts the object is used - * @rcu: struct used for freeing in an RCU-safe manner - * @bat_iv: B.A.T.M.A.N. IV private structure + * @rcu: struct used for freeing in a RCU-safe manner */ -struct batadv_neigh_node { +struct batadv_neigh_ifinfo { struct hlist_node list; - struct batadv_orig_node *orig_node; - uint8_t addr[ETH_ALEN]; - struct batadv_hard_iface *if_incoming; - unsigned long last_seen; + struct batadv_hard_iface *if_outgoing; + struct batadv_neigh_ifinfo_bat_iv bat_iv; uint8_t last_ttl; - struct list_head bonding_list; atomic_t refcount; struct rcu_head rcu; - struct batadv_neigh_bat_iv bat_iv; }; /** @@ -503,7 +560,7 @@ struct batadv_priv_bla { #endif /** - * struct batadv_debug_log - debug logging data + * struct batadv_priv_debug_log - debug logging data * @log_buff: buffer holding the logs (ring bufer) * @log_start: index of next character to read * @log_end: index of next character to write @@ -566,6 +623,39 @@ struct batadv_priv_dat { }; #endif +#ifdef CONFIG_BATMAN_ADV_MCAST +/** + * struct batadv_priv_mcast - per mesh interface mcast data + * @mla_list: list of multicast addresses we are currently announcing via TT + * @want_all_unsnoopables_list: a list of orig_nodes wanting all unsnoopable + * multicast traffic + * @want_all_ipv4_list: a list of orig_nodes wanting all IPv4 multicast traffic + * @want_all_ipv6_list: a list of orig_nodes wanting all IPv6 multicast traffic + * @flags: the flags we have last sent in our mcast tvlv + * @enabled: whether the multicast tvlv is currently enabled + * @num_disabled: number of nodes that have no mcast tvlv + * @num_want_all_unsnoopables: number of nodes wanting unsnoopable IP traffic + * @num_want_all_ipv4: counter for items in want_all_ipv4_list + * @num_want_all_ipv6: counter for items in want_all_ipv6_list + * @want_lists_lock: lock for protecting modifications to mcast want lists + * (traversals are rcu-locked) + */ +struct batadv_priv_mcast { + struct hlist_head mla_list; + struct hlist_head want_all_unsnoopables_list; + struct hlist_head want_all_ipv4_list; + struct hlist_head want_all_ipv6_list; + uint8_t flags; + bool enabled; + atomic_t num_disabled; + atomic_t num_want_all_unsnoopables; + atomic_t num_want_all_ipv4; + atomic_t num_want_all_ipv6; + /* protects want_all_{unsnoopables,ipv4,ipv6}_list */ + spinlock_t want_lists_lock; +}; +#endif + /** * struct batadv_priv_nc - per mesh interface network coding private data * @work: work queue callback item for cleanup @@ -597,6 +687,7 @@ struct batadv_priv_nc { /** * struct batadv_softif_vlan - per VLAN attributes set + * @bat_priv: pointer to the mesh object * @vid: VLAN identifier * @kobj: kobject for sysfs vlan subdirectory * @ap_isolation: AP isolation state @@ -606,6 +697,7 @@ struct batadv_priv_nc { * @rcu: struct used for freeing in a RCU-safe manner */ struct batadv_softif_vlan { + struct batadv_priv *bat_priv; unsigned short vid; struct kobject *kobj; atomic_t ap_isolation; /* boolean */ @@ -631,6 +723,8 @@ struct batadv_softif_vlan { * enabled * @distributed_arp_table: bool indicating whether distributed ARP table is * enabled + * @multicast_mode: Enable or disable multicast optimizations on this node's + * sender/originating side * @gw_mode: gateway operation: off, client or server (see batadv_gw_modes) * @gw_sel_class: gateway selection class (applies if gw_mode client) * @orig_interval: OGM broadcast interval in milliseconds @@ -661,6 +755,7 @@ struct batadv_softif_vlan { * @tt: translation table data * @tvlv: type-version-length-value data * @dat: distributed arp table data + * @mcast: multicast data * @network_coding: bool indicating whether network coding is enabled * @batadv_priv_nc: network coding data */ @@ -680,6 +775,9 @@ struct batadv_priv { #ifdef CONFIG_BATMAN_ADV_DAT atomic_t distributed_arp_table; #endif +#ifdef CONFIG_BATMAN_ADV_MCAST + atomic_t multicast_mode; +#endif atomic_t gw_mode; atomic_t gw_sel_class; atomic_t orig_interval; @@ -687,6 +785,8 @@ struct batadv_priv { #ifdef CONFIG_BATMAN_ADV_DEBUG atomic_t log_level; #endif + uint32_t isolation_mark; + uint32_t isolation_mark_mask; atomic_t bcast_seqno; atomic_t bcast_queue_left; atomic_t batman_queue_left; @@ -716,6 +816,9 @@ struct batadv_priv { #ifdef CONFIG_BATMAN_ADV_DAT struct batadv_priv_dat dat; #endif +#ifdef CONFIG_BATMAN_ADV_MCAST + struct batadv_priv_mcast mcast; +#endif #ifdef CONFIG_BATMAN_ADV_NC atomic_t network_coding; struct batadv_priv_nc nc; @@ -838,12 +941,14 @@ struct batadv_tt_local_entry { * struct batadv_tt_global_entry - translation table global entry data * @common: general translation table data * @orig_list: list of orig nodes announcing this non-mesh client + * @orig_list_count: number of items in the orig_list * @list_lock: lock protecting orig_list * @roam_at: time at which TT_GLOBAL_ROAM was set */ struct batadv_tt_global_entry { struct batadv_tt_common_entry common; struct hlist_head orig_list; + atomic_t orig_list_count; spinlock_t list_lock; /* protects orig_list */ unsigned long roam_at; }; @@ -961,8 +1066,8 @@ struct batadv_nc_packet { }; /** - * batadv_skb_cb - control buffer structure used to store private data relevant - * to batman-adv in the skb->cb buffer in skbs. + * struct batadv_skb_cb - control buffer structure used to store private data + * relevant to batman-adv in the skb->cb buffer in skbs. * @decoded: Marks a skb as decoded, which is checked when searching for coding * opportunities in network-coding.c */ @@ -981,8 +1086,10 @@ struct batadv_skb_cb { * @direct_link_flags: direct link flags for aggregated OGM packets * @num_packets: counter for bcast packet retransmission * @delayed_work: work queue callback item for packet sending - * @if_incoming: pointer incoming hard-iface or primary iface if locally - * generated packet + * @if_incoming: pointer to incoming hard-iface or primary iface if + * locally generated packet + * @if_outgoing: packet where the packet should be sent to, or NULL if + * unspecified */ struct batadv_forw_packet { struct hlist_node list; @@ -994,6 +1101,7 @@ struct batadv_forw_packet { uint8_t num_packets; struct delayed_work delayed_work; struct batadv_hard_iface *if_incoming; + struct batadv_hard_iface *if_outgoing; }; /** @@ -1007,9 +1115,11 @@ struct batadv_forw_packet { * @bat_primary_iface_set: called when primary interface is selected / changed * @bat_ogm_schedule: prepare a new outgoing OGM for the send queue * @bat_ogm_emit: send scheduled OGM - * @bat_neigh_cmp: compare the metrics of two neighbors - * @bat_neigh_is_equiv_or_better: check if neigh1 is equally good or - * better than neigh2 from the metric prospective + * @bat_neigh_cmp: compare the metrics of two neighbors for their respective + * outgoing interfaces + * @bat_neigh_is_equiv_or_better: check if neigh1 is equally good or better + * than neigh2 for their respective outgoing interface from the metric + * prospective * @bat_orig_print: print the originator table (optional) * @bat_orig_free: free the resources allocated by the routing algorithm for an * orig_node object @@ -1028,11 +1138,17 @@ struct batadv_algo_ops { void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface); void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet); int (*bat_neigh_cmp)(struct batadv_neigh_node *neigh1, - struct batadv_neigh_node *neigh2); - bool (*bat_neigh_is_equiv_or_better)(struct batadv_neigh_node *neigh1, - struct batadv_neigh_node *neigh2); + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2); + bool (*bat_neigh_is_equiv_or_better) + (struct batadv_neigh_node *neigh1, + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2); /* orig_node handling API */ - void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq); + void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq, + struct batadv_hard_iface *hard_iface); void (*bat_orig_free)(struct batadv_orig_node *orig_node); int (*bat_orig_add_if)(struct batadv_orig_node *orig_node, int max_if_num); @@ -1062,6 +1178,16 @@ struct batadv_dat_entry { }; /** + * struct batadv_hw_addr - a list entry for a MAC address + * @list: list node for the linking of entries + * @addr: the MAC address of this list entry + */ +struct batadv_hw_addr { + struct hlist_node list; + unsigned char addr[ETH_ALEN]; +}; + +/** * struct batadv_dat_candidate - candidate destination for DAT operations * @type: the type of the selected candidate. It can one of the following: * - BATADV_DAT_CANDIDATE_NOT_FOUND |