| /* Copyright (C) 2007-2015 B.A.T.M.A.N. contributors: |
| * |
| * Marek Lindner, Simon Wunderlich |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of version 2 of the GNU General Public |
| * License as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "send.h" |
| #include "main.h" |
| |
| #include <linux/atomic.h> |
| #include <linux/byteorder/generic.h> |
| #include <linux/etherdevice.h> |
| #include <linux/fs.h> |
| #include <linux/if_ether.h> |
| #include <linux/if.h> |
| #include <linux/jiffies.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/netdevice.h> |
| #include <linux/printk.h> |
| #include <linux/rculist.h> |
| #include <linux/rcupdate.h> |
| #include <linux/skbuff.h> |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <linux/stddef.h> |
| #include <linux/workqueue.h> |
| |
| #include "distributed-arp-table.h" |
| #include "fragmentation.h" |
| #include "gateway_client.h" |
| #include "hard-interface.h" |
| #include "network-coding.h" |
| #include "originator.h" |
| #include "routing.h" |
| #include "soft-interface.h" |
| #include "translation-table.h" |
| |
| static void batadv_send_outstanding_bcast_packet(struct work_struct *work); |
| |
| /* send out an already prepared packet to the given address via the |
| * specified batman interface |
| */ |
| int batadv_send_skb_packet(struct sk_buff *skb, |
| struct batadv_hard_iface *hard_iface, |
| const u8 *dst_addr) |
| { |
| struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
| struct ethhdr *ethhdr; |
| |
| if (hard_iface->if_status != BATADV_IF_ACTIVE) |
| goto send_skb_err; |
| |
| if (unlikely(!hard_iface->net_dev)) |
| goto send_skb_err; |
| |
| if (!(hard_iface->net_dev->flags & IFF_UP)) { |
| pr_warn("Interface %s is not up - can't send packet via that interface!\n", |
| hard_iface->net_dev->name); |
| goto send_skb_err; |
| } |
| |
| /* push to the ethernet header. */ |
| if (batadv_skb_head_push(skb, ETH_HLEN) < 0) |
| goto send_skb_err; |
| |
| skb_reset_mac_header(skb); |
| |
| ethhdr = eth_hdr(skb); |
| 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); |
| skb->protocol = htons(ETH_P_BATMAN); |
| |
| skb->dev = hard_iface->net_dev; |
| |
| /* Save a clone of the skb to use when decoding coded packets */ |
| batadv_nc_skb_store_for_decoding(bat_priv, skb); |
| |
| /* dev_queue_xmit() returns a negative result on error. However on |
| * congestion and traffic shaping, it drops and returns NET_XMIT_DROP |
| * (which is > 0). This will not be treated as an error. |
| */ |
| return dev_queue_xmit(skb); |
| send_skb_err: |
| kfree_skb(skb); |
| return NET_XMIT_DROP; |
| } |
| |
| /** |
| * batadv_send_skb_to_orig - Lookup next-hop and transmit skb. |
| * @skb: Packet to be transmitted. |
| * @orig_node: Final destination of the packet. |
| * @recv_if: Interface used when receiving the packet (can be NULL). |
| * |
| * Looks up the best next-hop towards the passed originator and passes the |
| * skb on for preparation of MAC header. If the packet originated from this |
| * host, NULL can be passed as recv_if and no interface alternating is |
| * attempted. |
| * |
| * Return: NET_XMIT_SUCCESS on success, NET_XMIT_DROP on failure, or |
| * NET_XMIT_POLICED if the skb is buffered for later transmit. |
| */ |
| int batadv_send_skb_to_orig(struct sk_buff *skb, |
| struct batadv_orig_node *orig_node, |
| struct batadv_hard_iface *recv_if) |
| { |
| struct batadv_priv *bat_priv = orig_node->bat_priv; |
| struct batadv_neigh_node *neigh_node; |
| int ret = NET_XMIT_DROP; |
| |
| /* batadv_find_router() increases neigh_nodes refcount if found. */ |
| neigh_node = batadv_find_router(bat_priv, orig_node, recv_if); |
| if (!neigh_node) |
| goto out; |
| |
| /* Check if the skb is too large to send in one piece and fragment |
| * it if needed. |
| */ |
| if (atomic_read(&bat_priv->fragmentation) && |
| skb->len > neigh_node->if_incoming->net_dev->mtu) { |
| /* Fragment and send packet. */ |
| if (batadv_frag_send_packet(skb, orig_node, neigh_node)) |
| ret = NET_XMIT_SUCCESS; |
| |
| goto out; |
| } |
| |
| /* try to network code the packet, if it is received on an interface |
| * (i.e. being forwarded). If the packet originates from this node or if |
| * network coding fails, then send the packet as usual. |
| */ |
| if (recv_if && batadv_nc_skb_forward(skb, neigh_node)) { |
| ret = NET_XMIT_POLICED; |
| } else { |
| batadv_send_skb_packet(skb, neigh_node->if_incoming, |
| neigh_node->addr); |
| ret = NET_XMIT_SUCCESS; |
| } |
| |
| out: |
| if (neigh_node) |
| batadv_neigh_node_free_ref(neigh_node); |
| |
| return ret; |
| } |
| |
| /** |
| * batadv_send_skb_push_fill_unicast - extend the buffer and initialize the |
| * common fields for unicast packets |
| * @skb: the skb carrying the unicast header to initialize |
| * @hdr_size: amount of bytes to push at the beginning of the skb |
| * @orig_node: the destination node |
| * |
| * Return: false if the buffer extension was not possible or true otherwise. |
| */ |
| static bool |
| batadv_send_skb_push_fill_unicast(struct sk_buff *skb, int hdr_size, |
| struct batadv_orig_node *orig_node) |
| { |
| struct batadv_unicast_packet *unicast_packet; |
| u8 ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
| |
| if (batadv_skb_head_push(skb, hdr_size) < 0) |
| return false; |
| |
| unicast_packet = (struct batadv_unicast_packet *)skb->data; |
| unicast_packet->version = BATADV_COMPAT_VERSION; |
| /* batman packet type: unicast */ |
| unicast_packet->packet_type = BATADV_UNICAST; |
| /* set unicast ttl */ |
| unicast_packet->ttl = BATADV_TTL; |
| /* copy the destination for faster routing */ |
| ether_addr_copy(unicast_packet->dest, orig_node->orig); |
| /* set the destination tt version number */ |
| unicast_packet->ttvn = ttvn; |
| |
| return true; |
| } |
| |
| /** |
| * batadv_send_skb_prepare_unicast - encapsulate an skb with a unicast header |
| * @skb: the skb containing the payload to encapsulate |
| * @orig_node: the destination node |
| * |
| * Return: false if the payload could not be encapsulated or true otherwise. |
| */ |
| static bool batadv_send_skb_prepare_unicast(struct sk_buff *skb, |
| struct batadv_orig_node *orig_node) |
| { |
| size_t uni_size = sizeof(struct batadv_unicast_packet); |
| |
| return batadv_send_skb_push_fill_unicast(skb, uni_size, orig_node); |
| } |
| |
| /** |
| * batadv_send_skb_prepare_unicast_4addr - encapsulate an skb with a |
| * unicast 4addr header |
| * @bat_priv: the bat priv with all the soft interface information |
| * @skb: the skb containing the payload to encapsulate |
| * @orig: the destination node |
| * @packet_subtype: the unicast 4addr packet subtype to use |
| * |
| * Return: false if the payload could not be encapsulated or true otherwise. |
| */ |
| bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv, |
| struct sk_buff *skb, |
| struct batadv_orig_node *orig, |
| int packet_subtype) |
| { |
| struct batadv_hard_iface *primary_if; |
| struct batadv_unicast_4addr_packet *uc_4addr_packet; |
| bool ret = false; |
| |
| primary_if = batadv_primary_if_get_selected(bat_priv); |
| if (!primary_if) |
| goto out; |
| |
| /* Pull the header space and fill the unicast_packet substructure. |
| * We can do that because the first member of the uc_4addr_packet |
| * is of type struct unicast_packet |
| */ |
| if (!batadv_send_skb_push_fill_unicast(skb, sizeof(*uc_4addr_packet), |
| orig)) |
| goto out; |
| |
| uc_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; |
| 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; |
| |
| ret = true; |
| out: |
| if (primary_if) |
| batadv_hardif_free_ref(primary_if); |
| return ret; |
| } |
| |
| /** |
| * batadv_send_skb_unicast - encapsulate and send an skb via unicast |
| * @bat_priv: the bat priv with all the soft interface information |
| * @skb: payload to send |
| * @packet_type: the batman unicast packet type to use |
| * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast |
| * 4addr packets) |
| * @orig_node: the originator to send the packet to |
| * @vid: the vid to be used to search the translation table |
| * |
| * Wrap the given skb into a batman-adv unicast or unicast-4addr header |
| * depending on whether BATADV_UNICAST or BATADV_UNICAST_4ADDR was supplied |
| * as packet_type. Then send this frame to the given orig_node and release a |
| * reference to this orig_node. |
| * |
| * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. |
| */ |
| 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 batadv_unicast_packet *unicast_packet; |
| struct ethhdr *ethhdr; |
| int ret = NET_XMIT_DROP; |
| |
| if (!orig_node) |
| goto out; |
| |
| switch (packet_type) { |
| case BATADV_UNICAST: |
| if (!batadv_send_skb_prepare_unicast(skb, orig_node)) |
| goto out; |
| break; |
| case BATADV_UNICAST_4ADDR: |
| if (!batadv_send_skb_prepare_unicast_4addr(bat_priv, skb, |
| orig_node, |
| packet_subtype)) |
| goto out; |
| break; |
| default: |
| /* this function supports UNICAST and UNICAST_4ADDR only. It |
| * should never be invoked with any other packet type |
| */ |
| 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 |
| * for this client. The destination will receive this packet and will |
| * try to reroute it because the ttvn contained in the header is less |
| * than the current one |
| */ |
| if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest, vid)) |
| unicast_packet->ttvn = unicast_packet->ttvn - 1; |
| |
| if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP) |
| ret = NET_XMIT_SUCCESS; |
| |
| out: |
| if (orig_node) |
| batadv_orig_node_free_ref(orig_node); |
| if (ret == NET_XMIT_DROP) |
| kfree_skb(skb); |
| return ret; |
| } |
| |
| /** |
| * batadv_send_skb_via_tt_generic - send an skb via TT lookup |
| * @bat_priv: the bat priv with all the soft interface information |
| * @skb: payload to send |
| * @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 |
| * header via the translation table. Wrap the given skb into a batman-adv |
| * unicast or unicast-4addr header depending on whether BATADV_UNICAST or |
| * BATADV_UNICAST_4ADDR was supplied as packet_type. Then send this frame |
| * to the according destination node. |
| * |
| * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. |
| */ |
| int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv, |
| struct sk_buff *skb, int packet_type, |
| int packet_subtype, u8 *dst_hint, |
| unsigned short vid) |
| { |
| struct ethhdr *ethhdr = (struct ethhdr *)skb->data; |
| struct batadv_orig_node *orig_node; |
| u8 *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); |
| |
| return batadv_send_skb_unicast(bat_priv, skb, packet_type, |
| packet_subtype, orig_node, vid); |
| } |
| |
| /** |
| * batadv_send_skb_via_gw - send an skb via gateway lookup |
| * @bat_priv: the bat priv with all the soft interface information |
| * @skb: payload to send |
| * @vid: the vid to be used to search the translation table |
| * |
| * Look up the currently selected gateway. Wrap the given skb into a batman-adv |
| * unicast header and send this frame to this gateway node. |
| * |
| * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. |
| */ |
| int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb, |
| unsigned short vid) |
| { |
| struct batadv_orig_node *orig_node; |
| |
| orig_node = batadv_gw_get_selected_orig(bat_priv); |
| return batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST, 0, |
| orig_node, vid); |
| } |
| |
| void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface) |
| { |
| struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
| |
| if ((hard_iface->if_status == BATADV_IF_NOT_IN_USE) || |
| (hard_iface->if_status == BATADV_IF_TO_BE_REMOVED)) |
| return; |
| |
| /* the interface gets activated here to avoid race conditions between |
| * the moment of activating the interface in |
| * hardif_activate_interface() where the originator mac is set and |
| * outdated packets (especially uninitialized mac addresses) in the |
| * packet queue |
| */ |
| if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) |
| hard_iface->if_status = BATADV_IF_ACTIVE; |
| |
| bat_priv->bat_algo_ops->bat_ogm_schedule(hard_iface); |
| } |
| |
| 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); |
| } |
| |
| static void |
| _batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, |
| struct batadv_forw_packet *forw_packet, |
| unsigned long send_time) |
| { |
| /* add new packet to packet list */ |
| spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
| hlist_add_head(&forw_packet->list, &bat_priv->forw_bcast_list); |
| spin_unlock_bh(&bat_priv->forw_bcast_list_lock); |
| |
| /* start timer for this packet */ |
| queue_delayed_work(batadv_event_workqueue, &forw_packet->delayed_work, |
| send_time); |
| } |
| |
| /** |
| * batadv_add_bcast_packet_to_list - queue broadcast packet for multiple sends |
| * @bat_priv: the bat priv with all the soft interface information |
| * @skb: broadcast packet to add |
| * @delay: number of jiffies to wait before sending |
| * |
| * add a broadcast packet to the queue and setup timers. broadcast packets |
| * are sent multiple times to increase probability for being received. |
| * |
| * The skb is not consumed, so the caller should make sure that the |
| * skb is freed. |
| * |
| * Return: NETDEV_TX_OK on success and NETDEV_TX_BUSY on errors. |
| */ |
| int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, |
| const struct sk_buff *skb, |
| unsigned long delay) |
| { |
| struct batadv_hard_iface *primary_if = NULL; |
| struct batadv_forw_packet *forw_packet; |
| struct batadv_bcast_packet *bcast_packet; |
| struct sk_buff *newskb; |
| |
| if (!batadv_atomic_dec_not_zero(&bat_priv->bcast_queue_left)) { |
| batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| "bcast packet queue full\n"); |
| goto out; |
| } |
| |
| primary_if = batadv_primary_if_get_selected(bat_priv); |
| if (!primary_if) |
| goto out_and_inc; |
| |
| forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC); |
| |
| if (!forw_packet) |
| goto out_and_inc; |
| |
| newskb = skb_copy(skb, GFP_ATOMIC); |
| if (!newskb) |
| goto packet_free; |
| |
| /* as we have a copy now, it is safe to decrease the TTL */ |
| bcast_packet = (struct batadv_bcast_packet *)newskb->data; |
| 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; |
| |
| INIT_DELAYED_WORK(&forw_packet->delayed_work, |
| batadv_send_outstanding_bcast_packet); |
| |
| _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, delay); |
| return NETDEV_TX_OK; |
| |
| packet_free: |
| kfree(forw_packet); |
| out_and_inc: |
| atomic_inc(&bat_priv->bcast_queue_left); |
| out: |
| if (primary_if) |
| batadv_hardif_free_ref(primary_if); |
| return NETDEV_TX_BUSY; |
| } |
| |
| static void batadv_send_outstanding_bcast_packet(struct work_struct *work) |
| { |
| struct batadv_hard_iface *hard_iface; |
| struct delayed_work *delayed_work; |
| struct batadv_forw_packet *forw_packet; |
| struct sk_buff *skb1; |
| struct net_device *soft_iface; |
| struct batadv_priv *bat_priv; |
| |
| delayed_work = container_of(work, struct delayed_work, work); |
| forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
| delayed_work); |
| soft_iface = forw_packet->if_incoming->soft_iface; |
| bat_priv = netdev_priv(soft_iface); |
| |
| spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
| hlist_del(&forw_packet->list); |
| spin_unlock_bh(&bat_priv->forw_bcast_list_lock); |
| |
| if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
| goto out; |
| |
| if (batadv_dat_drop_broadcast_packet(bat_priv, forw_packet)) |
| goto out; |
| |
| /* rebroadcast packet */ |
| rcu_read_lock(); |
| list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
| if (hard_iface->soft_iface != soft_iface) |
| continue; |
| |
| if (forw_packet->num_packets >= hard_iface->num_bcasts) |
| continue; |
| |
| /* send a copy of the saved skb */ |
| skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC); |
| if (skb1) |
| batadv_send_skb_packet(skb1, hard_iface, |
| batadv_broadcast_addr); |
| } |
| rcu_read_unlock(); |
| |
| forw_packet->num_packets++; |
| |
| /* if we still have some more bcasts to send */ |
| if (forw_packet->num_packets < BATADV_NUM_BCASTS_MAX) { |
| _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, |
| msecs_to_jiffies(5)); |
| return; |
| } |
| |
| out: |
| batadv_forw_packet_free(forw_packet); |
| atomic_inc(&bat_priv->bcast_queue_left); |
| } |
| |
| void batadv_send_outstanding_bat_ogm_packet(struct work_struct *work) |
| { |
| struct delayed_work *delayed_work; |
| struct batadv_forw_packet *forw_packet; |
| struct batadv_priv *bat_priv; |
| |
| delayed_work = container_of(work, struct delayed_work, work); |
| forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
| delayed_work); |
| bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); |
| spin_lock_bh(&bat_priv->forw_bat_list_lock); |
| hlist_del(&forw_packet->list); |
| spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| |
| if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
| goto out; |
| |
| 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. |
| * |
| * 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 && |
| forw_packet->if_incoming == forw_packet->if_outgoing) |
| batadv_schedule_bat_ogm(forw_packet->if_incoming); |
| |
| out: |
| /* don't count own packet */ |
| if (!forw_packet->own) |
| atomic_inc(&bat_priv->batman_queue_left); |
| |
| batadv_forw_packet_free(forw_packet); |
| } |
| |
| void |
| batadv_purge_outstanding_packets(struct batadv_priv *bat_priv, |
| const struct batadv_hard_iface *hard_iface) |
| { |
| struct batadv_forw_packet *forw_packet; |
| struct hlist_node *safe_tmp_node; |
| bool pending; |
| |
| if (hard_iface) |
| batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| "purge_outstanding_packets(): %s\n", |
| hard_iface->net_dev->name); |
| else |
| batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| "purge_outstanding_packets()\n"); |
| |
| /* free bcast list */ |
| spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
| hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
| &bat_priv->forw_bcast_list, list) { |
| /* if purge_outstanding_packets() was called with an argument |
| * we delete only packets belonging to the given interface |
| */ |
| if ((hard_iface) && |
| (forw_packet->if_incoming != hard_iface) && |
| (forw_packet->if_outgoing != hard_iface)) |
| continue; |
| |
| spin_unlock_bh(&bat_priv->forw_bcast_list_lock); |
| |
| /* batadv_send_outstanding_bcast_packet() will lock the list to |
| * delete the item from the list |
| */ |
| pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
| spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
| |
| if (pending) { |
| hlist_del(&forw_packet->list); |
| batadv_forw_packet_free(forw_packet); |
| } |
| } |
| spin_unlock_bh(&bat_priv->forw_bcast_list_lock); |
| |
| /* free batman packet list */ |
| spin_lock_bh(&bat_priv->forw_bat_list_lock); |
| hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
| &bat_priv->forw_bat_list, list) { |
| /* if purge_outstanding_packets() was called with an argument |
| * we delete only packets belonging to the given interface |
| */ |
| if ((hard_iface) && |
| (forw_packet->if_incoming != hard_iface) && |
| (forw_packet->if_outgoing != hard_iface)) |
| continue; |
| |
| spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| |
| /* send_outstanding_bat_packet() will lock the list to |
| * delete the item from the list |
| */ |
| pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
| spin_lock_bh(&bat_priv->forw_bat_list_lock); |
| |
| if (pending) { |
| hlist_del(&forw_packet->list); |
| batadv_forw_packet_free(forw_packet); |
| } |
| } |
| spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| } |