A delayed_work struct does not need to be initialized each every time before being enqueued. Therefore the INIT_DELAYED_WORK() macro should be used during the initialization process only. Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
647 lines
17 KiB
C
647 lines
17 KiB
C
/* Copyright (C) 2009-2012 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner, Simon Wunderlich
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#include "main.h"
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#include "distributed-arp-table.h"
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#include "originator.h"
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#include "hash.h"
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#include "translation-table.h"
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#include "routing.h"
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#include "gateway_client.h"
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#include "hard-interface.h"
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#include "unicast.h"
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#include "soft-interface.h"
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#include "bridge_loop_avoidance.h"
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/* hash class keys */
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static struct lock_class_key batadv_orig_hash_lock_class_key;
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static void batadv_purge_orig(struct work_struct *work);
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/* returns 1 if they are the same originator */
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static int batadv_compare_orig(const struct hlist_node *node, const void *data2)
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{
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const void *data1 = container_of(node, struct batadv_orig_node,
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hash_entry);
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return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
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}
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int batadv_originator_init(struct batadv_priv *bat_priv)
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{
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if (bat_priv->orig_hash)
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return 0;
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bat_priv->orig_hash = batadv_hash_new(1024);
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if (!bat_priv->orig_hash)
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goto err;
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batadv_hash_set_lock_class(bat_priv->orig_hash,
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&batadv_orig_hash_lock_class_key);
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INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig);
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queue_delayed_work(batadv_event_workqueue,
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&bat_priv->orig_work,
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msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
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return 0;
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err:
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return -ENOMEM;
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}
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void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node)
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{
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if (atomic_dec_and_test(&neigh_node->refcount))
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kfree_rcu(neigh_node, rcu);
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}
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/* increases the refcounter of a found router */
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struct batadv_neigh_node *
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batadv_orig_node_get_router(struct batadv_orig_node *orig_node)
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{
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struct batadv_neigh_node *router;
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rcu_read_lock();
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router = rcu_dereference(orig_node->router);
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if (router && !atomic_inc_not_zero(&router->refcount))
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router = NULL;
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rcu_read_unlock();
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return router;
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}
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struct batadv_neigh_node *
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batadv_neigh_node_new(struct batadv_hard_iface *hard_iface,
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const uint8_t *neigh_addr, uint32_t seqno)
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{
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struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
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struct batadv_neigh_node *neigh_node;
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neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC);
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if (!neigh_node)
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goto out;
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INIT_HLIST_NODE(&neigh_node->list);
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memcpy(neigh_node->addr, neigh_addr, ETH_ALEN);
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spin_lock_init(&neigh_node->lq_update_lock);
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/* extra reference for return */
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atomic_set(&neigh_node->refcount, 2);
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
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"Creating new neighbor %pM, initial seqno %d\n",
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neigh_addr, seqno);
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out:
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return neigh_node;
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}
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static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
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{
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struct hlist_node *node, *node_tmp;
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struct batadv_neigh_node *neigh_node, *tmp_neigh_node;
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struct batadv_orig_node *orig_node;
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orig_node = container_of(rcu, struct batadv_orig_node, rcu);
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spin_lock_bh(&orig_node->neigh_list_lock);
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/* for all bonding members ... */
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list_for_each_entry_safe(neigh_node, tmp_neigh_node,
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&orig_node->bond_list, bonding_list) {
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list_del_rcu(&neigh_node->bonding_list);
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batadv_neigh_node_free_ref(neigh_node);
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}
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/* for all neighbors towards this originator ... */
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hlist_for_each_entry_safe(neigh_node, node, node_tmp,
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&orig_node->neigh_list, list) {
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hlist_del_rcu(&neigh_node->list);
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batadv_neigh_node_free_ref(neigh_node);
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}
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spin_unlock_bh(&orig_node->neigh_list_lock);
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batadv_frag_list_free(&orig_node->frag_list);
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batadv_tt_global_del_orig(orig_node->bat_priv, orig_node,
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"originator timed out");
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kfree(orig_node->tt_buff);
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kfree(orig_node->bcast_own);
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kfree(orig_node->bcast_own_sum);
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kfree(orig_node);
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}
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void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node)
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{
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if (atomic_dec_and_test(&orig_node->refcount))
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call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu);
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}
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void batadv_originator_free(struct batadv_priv *bat_priv)
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{
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struct batadv_hashtable *hash = bat_priv->orig_hash;
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struct hlist_node *node, *node_tmp;
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struct hlist_head *head;
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spinlock_t *list_lock; /* spinlock to protect write access */
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struct batadv_orig_node *orig_node;
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uint32_t i;
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if (!hash)
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return;
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cancel_delayed_work_sync(&bat_priv->orig_work);
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bat_priv->orig_hash = NULL;
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for (i = 0; i < hash->size; i++) {
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head = &hash->table[i];
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list_lock = &hash->list_locks[i];
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spin_lock_bh(list_lock);
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hlist_for_each_entry_safe(orig_node, node, node_tmp,
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head, hash_entry) {
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hlist_del_rcu(node);
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batadv_orig_node_free_ref(orig_node);
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}
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spin_unlock_bh(list_lock);
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}
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batadv_hash_destroy(hash);
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}
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/* this function finds or creates an originator entry for the given
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* address if it does not exits
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*/
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struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv,
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const uint8_t *addr)
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{
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struct batadv_orig_node *orig_node;
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int size;
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int hash_added;
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unsigned long reset_time;
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orig_node = batadv_orig_hash_find(bat_priv, addr);
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if (orig_node)
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return orig_node;
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
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"Creating new originator: %pM\n", addr);
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orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC);
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if (!orig_node)
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return NULL;
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INIT_HLIST_HEAD(&orig_node->neigh_list);
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INIT_LIST_HEAD(&orig_node->bond_list);
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spin_lock_init(&orig_node->ogm_cnt_lock);
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spin_lock_init(&orig_node->bcast_seqno_lock);
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spin_lock_init(&orig_node->neigh_list_lock);
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spin_lock_init(&orig_node->tt_buff_lock);
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/* extra reference for return */
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atomic_set(&orig_node->refcount, 2);
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orig_node->tt_initialised = false;
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orig_node->bat_priv = bat_priv;
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memcpy(orig_node->orig, addr, ETH_ALEN);
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batadv_dat_init_orig_node_addr(orig_node);
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orig_node->router = NULL;
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orig_node->tt_crc = 0;
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atomic_set(&orig_node->last_ttvn, 0);
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orig_node->tt_buff = NULL;
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orig_node->tt_buff_len = 0;
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atomic_set(&orig_node->tt_size, 0);
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reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
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orig_node->bcast_seqno_reset = reset_time;
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orig_node->batman_seqno_reset = reset_time;
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atomic_set(&orig_node->bond_candidates, 0);
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size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS;
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orig_node->bcast_own = kzalloc(size, GFP_ATOMIC);
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if (!orig_node->bcast_own)
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goto free_orig_node;
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size = bat_priv->num_ifaces * sizeof(uint8_t);
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orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC);
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INIT_LIST_HEAD(&orig_node->frag_list);
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orig_node->last_frag_packet = 0;
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if (!orig_node->bcast_own_sum)
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goto free_bcast_own;
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hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig,
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batadv_choose_orig, orig_node,
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&orig_node->hash_entry);
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if (hash_added != 0)
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goto free_bcast_own_sum;
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return orig_node;
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free_bcast_own_sum:
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kfree(orig_node->bcast_own_sum);
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free_bcast_own:
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kfree(orig_node->bcast_own);
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free_orig_node:
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kfree(orig_node);
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return NULL;
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}
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static bool
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batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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struct batadv_neigh_node **best_neigh_node)
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{
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struct hlist_node *node, *node_tmp;
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struct batadv_neigh_node *neigh_node;
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bool neigh_purged = false;
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unsigned long last_seen;
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struct batadv_hard_iface *if_incoming;
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*best_neigh_node = NULL;
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spin_lock_bh(&orig_node->neigh_list_lock);
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/* for all neighbors towards this originator ... */
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hlist_for_each_entry_safe(neigh_node, node, node_tmp,
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&orig_node->neigh_list, list) {
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last_seen = neigh_node->last_seen;
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if_incoming = neigh_node->if_incoming;
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if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) ||
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(if_incoming->if_status == BATADV_IF_INACTIVE) ||
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(if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
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(if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) {
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if ((if_incoming->if_status == BATADV_IF_INACTIVE) ||
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(if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
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(if_incoming->if_status == BATADV_IF_TO_BE_REMOVED))
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
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"neighbor purge: originator %pM, neighbor: %pM, iface: %s\n",
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orig_node->orig, neigh_node->addr,
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if_incoming->net_dev->name);
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else
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
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"neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
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orig_node->orig, neigh_node->addr,
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jiffies_to_msecs(last_seen));
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neigh_purged = true;
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hlist_del_rcu(&neigh_node->list);
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batadv_bonding_candidate_del(orig_node, neigh_node);
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batadv_neigh_node_free_ref(neigh_node);
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} else {
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if ((!*best_neigh_node) ||
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(neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
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*best_neigh_node = neigh_node;
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}
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}
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spin_unlock_bh(&orig_node->neigh_list_lock);
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return neigh_purged;
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}
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static bool batadv_purge_orig_node(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node)
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{
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struct batadv_neigh_node *best_neigh_node;
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if (batadv_has_timed_out(orig_node->last_seen,
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2 * BATADV_PURGE_TIMEOUT)) {
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
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"Originator timeout: originator %pM, last_seen %u\n",
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orig_node->orig,
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jiffies_to_msecs(orig_node->last_seen));
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return true;
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} else {
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if (batadv_purge_orig_neighbors(bat_priv, orig_node,
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&best_neigh_node))
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batadv_update_route(bat_priv, orig_node,
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best_neigh_node);
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}
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return false;
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}
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static void _batadv_purge_orig(struct batadv_priv *bat_priv)
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{
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struct batadv_hashtable *hash = bat_priv->orig_hash;
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struct hlist_node *node, *node_tmp;
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struct hlist_head *head;
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spinlock_t *list_lock; /* spinlock to protect write access */
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struct batadv_orig_node *orig_node;
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uint32_t i;
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if (!hash)
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return;
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/* for all origins... */
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for (i = 0; i < hash->size; i++) {
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head = &hash->table[i];
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list_lock = &hash->list_locks[i];
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spin_lock_bh(list_lock);
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hlist_for_each_entry_safe(orig_node, node, node_tmp,
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head, hash_entry) {
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if (batadv_purge_orig_node(bat_priv, orig_node)) {
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if (orig_node->gw_flags)
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batadv_gw_node_delete(bat_priv,
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orig_node);
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hlist_del_rcu(node);
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batadv_orig_node_free_ref(orig_node);
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continue;
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}
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if (batadv_has_timed_out(orig_node->last_frag_packet,
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BATADV_FRAG_TIMEOUT))
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batadv_frag_list_free(&orig_node->frag_list);
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}
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spin_unlock_bh(list_lock);
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}
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batadv_gw_node_purge(bat_priv);
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batadv_gw_election(bat_priv);
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}
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static void batadv_purge_orig(struct work_struct *work)
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{
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struct delayed_work *delayed_work;
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struct batadv_priv *bat_priv;
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delayed_work = container_of(work, struct delayed_work, work);
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bat_priv = container_of(delayed_work, struct batadv_priv, orig_work);
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_batadv_purge_orig(bat_priv);
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queue_delayed_work(batadv_event_workqueue,
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&bat_priv->orig_work,
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msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
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}
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void batadv_purge_orig_ref(struct batadv_priv *bat_priv)
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{
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_batadv_purge_orig(bat_priv);
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}
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int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
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{
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struct net_device *net_dev = (struct net_device *)seq->private;
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struct batadv_priv *bat_priv = netdev_priv(net_dev);
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struct batadv_hashtable *hash = bat_priv->orig_hash;
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struct hlist_node *node, *node_tmp;
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struct hlist_head *head;
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struct batadv_hard_iface *primary_if;
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struct batadv_orig_node *orig_node;
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struct batadv_neigh_node *neigh_node, *neigh_node_tmp;
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int batman_count = 0;
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int last_seen_secs;
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int last_seen_msecs;
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unsigned long last_seen_jiffies;
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uint32_t i;
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primary_if = batadv_seq_print_text_primary_if_get(seq);
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if (!primary_if)
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goto out;
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seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s)]\n",
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BATADV_SOURCE_VERSION, primary_if->net_dev->name,
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primary_if->net_dev->dev_addr, net_dev->name);
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seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
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"Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE,
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"Nexthop", "outgoingIF", "Potential nexthops");
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for (i = 0; i < hash->size; i++) {
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head = &hash->table[i];
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rcu_read_lock();
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hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
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neigh_node = batadv_orig_node_get_router(orig_node);
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if (!neigh_node)
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continue;
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if (neigh_node->tq_avg == 0)
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goto next;
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last_seen_jiffies = jiffies - orig_node->last_seen;
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last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
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last_seen_secs = last_seen_msecs / 1000;
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last_seen_msecs = last_seen_msecs % 1000;
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seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:",
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orig_node->orig, last_seen_secs,
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last_seen_msecs, neigh_node->tq_avg,
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neigh_node->addr,
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neigh_node->if_incoming->net_dev->name);
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hlist_for_each_entry_rcu(neigh_node_tmp, node_tmp,
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&orig_node->neigh_list, list) {
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seq_printf(seq, " %pM (%3i)",
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neigh_node_tmp->addr,
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neigh_node_tmp->tq_avg);
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}
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seq_printf(seq, "\n");
|
|
batman_count++;
|
|
|
|
next:
|
|
batadv_neigh_node_free_ref(neigh_node);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
if (batman_count == 0)
|
|
seq_printf(seq, "No batman nodes in range ...\n");
|
|
|
|
out:
|
|
if (primary_if)
|
|
batadv_hardif_free_ref(primary_if);
|
|
return 0;
|
|
}
|
|
|
|
static int batadv_orig_node_add_if(struct batadv_orig_node *orig_node,
|
|
int max_if_num)
|
|
{
|
|
void *data_ptr;
|
|
size_t data_size, old_size;
|
|
|
|
data_size = max_if_num * sizeof(unsigned long) * BATADV_NUM_WORDS;
|
|
old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS;
|
|
data_ptr = kmalloc(data_size, GFP_ATOMIC);
|
|
if (!data_ptr)
|
|
return -ENOMEM;
|
|
|
|
memcpy(data_ptr, orig_node->bcast_own, old_size);
|
|
kfree(orig_node->bcast_own);
|
|
orig_node->bcast_own = data_ptr;
|
|
|
|
data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
|
|
if (!data_ptr)
|
|
return -ENOMEM;
|
|
|
|
memcpy(data_ptr, orig_node->bcast_own_sum,
|
|
(max_if_num - 1) * sizeof(uint8_t));
|
|
kfree(orig_node->bcast_own_sum);
|
|
orig_node->bcast_own_sum = data_ptr;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
|
|
int max_if_num)
|
|
{
|
|
struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
|
|
struct batadv_hashtable *hash = bat_priv->orig_hash;
|
|
struct hlist_node *node;
|
|
struct hlist_head *head;
|
|
struct batadv_orig_node *orig_node;
|
|
uint32_t i;
|
|
int ret;
|
|
|
|
/* resize all orig nodes because orig_node->bcast_own(_sum) depend on
|
|
* if_num
|
|
*/
|
|
for (i = 0; i < hash->size; i++) {
|
|
head = &hash->table[i];
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
|
|
spin_lock_bh(&orig_node->ogm_cnt_lock);
|
|
ret = batadv_orig_node_add_if(orig_node, max_if_num);
|
|
spin_unlock_bh(&orig_node->ogm_cnt_lock);
|
|
|
|
if (ret == -ENOMEM)
|
|
goto err;
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
rcu_read_unlock();
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static int batadv_orig_node_del_if(struct batadv_orig_node *orig_node,
|
|
int max_if_num, int del_if_num)
|
|
{
|
|
void *data_ptr = NULL;
|
|
int chunk_size;
|
|
|
|
/* last interface was removed */
|
|
if (max_if_num == 0)
|
|
goto free_bcast_own;
|
|
|
|
chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS;
|
|
data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
|
|
if (!data_ptr)
|
|
return -ENOMEM;
|
|
|
|
/* copy first part */
|
|
memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size);
|
|
|
|
/* copy second part */
|
|
memcpy((char *)data_ptr + del_if_num * chunk_size,
|
|
orig_node->bcast_own + ((del_if_num + 1) * chunk_size),
|
|
(max_if_num - del_if_num) * chunk_size);
|
|
|
|
free_bcast_own:
|
|
kfree(orig_node->bcast_own);
|
|
orig_node->bcast_own = data_ptr;
|
|
|
|
if (max_if_num == 0)
|
|
goto free_own_sum;
|
|
|
|
data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
|
|
if (!data_ptr)
|
|
return -ENOMEM;
|
|
|
|
memcpy(data_ptr, orig_node->bcast_own_sum,
|
|
del_if_num * sizeof(uint8_t));
|
|
|
|
memcpy((char *)data_ptr + del_if_num * sizeof(uint8_t),
|
|
orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)),
|
|
(max_if_num - del_if_num) * sizeof(uint8_t));
|
|
|
|
free_own_sum:
|
|
kfree(orig_node->bcast_own_sum);
|
|
orig_node->bcast_own_sum = data_ptr;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface,
|
|
int max_if_num)
|
|
{
|
|
struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
|
|
struct batadv_hashtable *hash = bat_priv->orig_hash;
|
|
struct hlist_node *node;
|
|
struct hlist_head *head;
|
|
struct batadv_hard_iface *hard_iface_tmp;
|
|
struct batadv_orig_node *orig_node;
|
|
uint32_t i;
|
|
int ret;
|
|
|
|
/* resize all orig nodes because orig_node->bcast_own(_sum) depend on
|
|
* if_num
|
|
*/
|
|
for (i = 0; i < hash->size; i++) {
|
|
head = &hash->table[i];
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
|
|
spin_lock_bh(&orig_node->ogm_cnt_lock);
|
|
ret = batadv_orig_node_del_if(orig_node, max_if_num,
|
|
hard_iface->if_num);
|
|
spin_unlock_bh(&orig_node->ogm_cnt_lock);
|
|
|
|
if (ret == -ENOMEM)
|
|
goto err;
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/* renumber remaining batman interfaces _inside_ of orig_hash_lock */
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) {
|
|
if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE)
|
|
continue;
|
|
|
|
if (hard_iface == hard_iface_tmp)
|
|
continue;
|
|
|
|
if (hard_iface->soft_iface != hard_iface_tmp->soft_iface)
|
|
continue;
|
|
|
|
if (hard_iface_tmp->if_num > hard_iface->if_num)
|
|
hard_iface_tmp->if_num--;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
hard_iface->if_num = -1;
|
|
return 0;
|
|
|
|
err:
|
|
rcu_read_unlock();
|
|
return -ENOMEM;
|
|
}
|