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![Sven Eckelmann](/assets/img/avatar_default.png)
The batman-adv source code was using the year of publication (to net-next) as "last" year for the copyright statement. The whole source code mentioned in the MAINTAINERS "BATMAN ADVANCED" section was handled as a single entity regarding the publishing year. This avoided having outdated (in sense of year information - not copyright holder) publishing information inside several files. But since the simple "update copyright year" commit (without other changes) in the file was not well received in the upstream kernel, the option to not have a copyright year (for initial and last publication) in the files are chosen instead. More detailed information about the years can still be retrieved from the SCM system. Signed-off-by: Sven Eckelmann <sven@narfation.org> Acked-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
1423 lines
39 KiB
C
1423 lines
39 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 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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#include "originator.h"
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#include "main.h"
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#include <linux/atomic.h>
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#include <linux/errno.h>
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#include <linux/etherdevice.h>
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#include <linux/gfp.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/kref.h>
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#include <linux/list.h>
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#include <linux/lockdep.h>
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#include <linux/netdevice.h>
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#include <linux/netlink.h>
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#include <linux/rculist.h>
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#include <linux/rcupdate.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/stddef.h>
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#include <linux/workqueue.h>
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#include <net/sock.h>
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#include <uapi/linux/batadv_packet.h>
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#include <uapi/linux/batman_adv.h>
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#include "bat_algo.h"
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#include "distributed-arp-table.h"
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#include "fragmentation.h"
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#include "gateway_client.h"
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#include "hard-interface.h"
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#include "hash.h"
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#include "log.h"
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#include "multicast.h"
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#include "netlink.h"
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#include "network-coding.h"
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#include "routing.h"
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#include "soft-interface.h"
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#include "translation-table.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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/**
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* batadv_orig_hash_find() - Find and return originator from orig_hash
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* @bat_priv: the bat priv with all the soft interface information
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* @data: mac address of the originator
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*
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* Return: orig_node (with increased refcnt), NULL on errors
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*/
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struct batadv_orig_node *
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batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data)
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{
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struct batadv_hashtable *hash = bat_priv->orig_hash;
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struct hlist_head *head;
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struct batadv_orig_node *orig_node, *orig_node_tmp = NULL;
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int index;
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if (!hash)
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return NULL;
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index = batadv_choose_orig(data, hash->size);
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head = &hash->table[index];
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rcu_read_lock();
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hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
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if (!batadv_compare_eth(orig_node, data))
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continue;
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if (!kref_get_unless_zero(&orig_node->refcount))
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continue;
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orig_node_tmp = orig_node;
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break;
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}
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rcu_read_unlock();
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return orig_node_tmp;
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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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* batadv_compare_orig() - comparing function used in the originator hash table
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* @node: node in the local table
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* @data2: second object to compare the node to
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*
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* Return: true if they are the same originator
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*/
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bool 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 batadv_compare_eth(data1, data2);
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}
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/**
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* batadv_orig_node_vlan_get() - get an orig_node_vlan object
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* @orig_node: the originator serving the VLAN
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* @vid: the VLAN identifier
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*
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* Return: the vlan object identified by vid and belonging to orig_node or NULL
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* if it does not exist.
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*/
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struct batadv_orig_node_vlan *
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batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node,
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unsigned short vid)
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{
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struct batadv_orig_node_vlan *vlan = NULL, *tmp;
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rcu_read_lock();
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hlist_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) {
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if (tmp->vid != vid)
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continue;
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if (!kref_get_unless_zero(&tmp->refcount))
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continue;
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vlan = tmp;
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break;
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}
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rcu_read_unlock();
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return vlan;
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}
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/**
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* batadv_orig_node_vlan_new() - search and possibly create an orig_node_vlan
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* object
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* @orig_node: the originator serving the VLAN
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* @vid: the VLAN identifier
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*
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* Return: NULL in case of failure or the vlan object identified by vid and
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* belonging to orig_node otherwise. The object is created and added to the list
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* if it does not exist.
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*
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* The object is returned with refcounter increased by 1.
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*/
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struct batadv_orig_node_vlan *
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batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node,
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unsigned short vid)
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{
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struct batadv_orig_node_vlan *vlan;
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spin_lock_bh(&orig_node->vlan_list_lock);
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/* first look if an object for this vid already exists */
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vlan = batadv_orig_node_vlan_get(orig_node, vid);
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if (vlan)
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goto out;
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vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
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if (!vlan)
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goto out;
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kref_init(&vlan->refcount);
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vlan->vid = vid;
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kref_get(&vlan->refcount);
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hlist_add_head_rcu(&vlan->list, &orig_node->vlan_list);
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out:
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spin_unlock_bh(&orig_node->vlan_list_lock);
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return vlan;
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}
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/**
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* batadv_orig_node_vlan_release() - release originator-vlan object from lists
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* and queue for free after rcu grace period
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* @ref: kref pointer of the originator-vlan object
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*/
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static void batadv_orig_node_vlan_release(struct kref *ref)
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{
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struct batadv_orig_node_vlan *orig_vlan;
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orig_vlan = container_of(ref, struct batadv_orig_node_vlan, refcount);
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kfree_rcu(orig_vlan, rcu);
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}
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/**
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* batadv_orig_node_vlan_put() - decrement the refcounter and possibly release
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* the originator-vlan object
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* @orig_vlan: the originator-vlan object to release
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*/
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void batadv_orig_node_vlan_put(struct batadv_orig_node_vlan *orig_vlan)
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{
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kref_put(&orig_vlan->refcount, batadv_orig_node_vlan_release);
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}
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/**
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* batadv_originator_init() - Initialize all originator structures
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* @bat_priv: the bat priv with all the soft interface information
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*
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* Return: 0 on success or negative error number in case of failure
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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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/**
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* batadv_neigh_ifinfo_release() - release neigh_ifinfo from lists and queue for
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* free after rcu grace period
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* @ref: kref pointer of the neigh_ifinfo
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*/
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static void batadv_neigh_ifinfo_release(struct kref *ref)
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{
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struct batadv_neigh_ifinfo *neigh_ifinfo;
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neigh_ifinfo = container_of(ref, struct batadv_neigh_ifinfo, refcount);
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if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT)
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batadv_hardif_put(neigh_ifinfo->if_outgoing);
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kfree_rcu(neigh_ifinfo, rcu);
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}
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/**
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* batadv_neigh_ifinfo_put() - decrement the refcounter and possibly release
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* the neigh_ifinfo
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* @neigh_ifinfo: the neigh_ifinfo object to release
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*/
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void batadv_neigh_ifinfo_put(struct batadv_neigh_ifinfo *neigh_ifinfo)
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{
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kref_put(&neigh_ifinfo->refcount, batadv_neigh_ifinfo_release);
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}
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/**
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* batadv_hardif_neigh_release() - release hardif neigh node from lists and
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* queue for free after rcu grace period
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* @ref: kref pointer of the neigh_node
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*/
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static void batadv_hardif_neigh_release(struct kref *ref)
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{
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struct batadv_hardif_neigh_node *hardif_neigh;
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hardif_neigh = container_of(ref, struct batadv_hardif_neigh_node,
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refcount);
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spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
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hlist_del_init_rcu(&hardif_neigh->list);
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spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
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batadv_hardif_put(hardif_neigh->if_incoming);
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kfree_rcu(hardif_neigh, rcu);
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}
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/**
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* batadv_hardif_neigh_put() - decrement the hardif neighbors refcounter
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* and possibly release it
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* @hardif_neigh: hardif neigh neighbor to free
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*/
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void batadv_hardif_neigh_put(struct batadv_hardif_neigh_node *hardif_neigh)
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{
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kref_put(&hardif_neigh->refcount, batadv_hardif_neigh_release);
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}
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/**
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* batadv_neigh_node_release() - release neigh_node from lists and queue for
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* free after rcu grace period
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* @ref: kref pointer of the neigh_node
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*/
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static void batadv_neigh_node_release(struct kref *ref)
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{
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struct hlist_node *node_tmp;
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struct batadv_neigh_node *neigh_node;
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struct batadv_neigh_ifinfo *neigh_ifinfo;
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neigh_node = container_of(ref, struct batadv_neigh_node, refcount);
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hlist_for_each_entry_safe(neigh_ifinfo, node_tmp,
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&neigh_node->ifinfo_list, list) {
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batadv_neigh_ifinfo_put(neigh_ifinfo);
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}
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batadv_hardif_neigh_put(neigh_node->hardif_neigh);
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batadv_hardif_put(neigh_node->if_incoming);
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kfree_rcu(neigh_node, rcu);
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}
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/**
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* batadv_neigh_node_put() - decrement the neighbors refcounter and possibly
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* release it
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* @neigh_node: neigh neighbor to free
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*/
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void batadv_neigh_node_put(struct batadv_neigh_node *neigh_node)
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{
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kref_put(&neigh_node->refcount, batadv_neigh_node_release);
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}
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/**
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* batadv_orig_router_get() - router to the originator depending on iface
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* @orig_node: the orig node for the router
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* @if_outgoing: the interface where the payload packet has been received or
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* the OGM should be sent to
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*
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* Return: the neighbor which should be the router for this orig_node/iface.
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*
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* The object is returned with refcounter increased by 1.
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*/
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struct batadv_neigh_node *
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batadv_orig_router_get(struct batadv_orig_node *orig_node,
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const struct batadv_hard_iface *if_outgoing)
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{
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struct batadv_orig_ifinfo *orig_ifinfo;
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struct batadv_neigh_node *router = NULL;
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rcu_read_lock();
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hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) {
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if (orig_ifinfo->if_outgoing != if_outgoing)
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continue;
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router = rcu_dereference(orig_ifinfo->router);
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break;
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}
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if (router && !kref_get_unless_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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/**
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* batadv_orig_ifinfo_get() - find the ifinfo from an orig_node
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* @orig_node: the orig node to be queried
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* @if_outgoing: the interface for which the ifinfo should be acquired
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*
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* Return: the requested orig_ifinfo or NULL if not found.
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*
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* The object is returned with refcounter increased by 1.
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*/
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struct batadv_orig_ifinfo *
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batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node,
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struct batadv_hard_iface *if_outgoing)
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{
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struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL;
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rcu_read_lock();
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hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list,
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list) {
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if (tmp->if_outgoing != if_outgoing)
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continue;
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if (!kref_get_unless_zero(&tmp->refcount))
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continue;
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orig_ifinfo = tmp;
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break;
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}
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rcu_read_unlock();
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return orig_ifinfo;
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}
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/**
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* batadv_orig_ifinfo_new() - search and possibly create an orig_ifinfo object
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* @orig_node: the orig node to be queried
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* @if_outgoing: the interface for which the ifinfo should be acquired
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*
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* Return: NULL in case of failure or the orig_ifinfo object for the if_outgoing
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* interface otherwise. The object is created and added to the list
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* if it does not exist.
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*
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* The object is returned with refcounter increased by 1.
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*/
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struct batadv_orig_ifinfo *
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batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node,
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struct batadv_hard_iface *if_outgoing)
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{
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struct batadv_orig_ifinfo *orig_ifinfo;
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unsigned long reset_time;
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spin_lock_bh(&orig_node->neigh_list_lock);
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orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing);
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if (orig_ifinfo)
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goto out;
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orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC);
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if (!orig_ifinfo)
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goto out;
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if (if_outgoing != BATADV_IF_DEFAULT)
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kref_get(&if_outgoing->refcount);
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reset_time = jiffies - 1;
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reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
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orig_ifinfo->batman_seqno_reset = reset_time;
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orig_ifinfo->if_outgoing = if_outgoing;
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INIT_HLIST_NODE(&orig_ifinfo->list);
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kref_init(&orig_ifinfo->refcount);
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kref_get(&orig_ifinfo->refcount);
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hlist_add_head_rcu(&orig_ifinfo->list,
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&orig_node->ifinfo_list);
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out:
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spin_unlock_bh(&orig_node->neigh_list_lock);
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return orig_ifinfo;
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}
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/**
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* batadv_neigh_ifinfo_get() - find the ifinfo from an neigh_node
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* @neigh: the neigh node to be queried
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* @if_outgoing: the interface for which the ifinfo should be acquired
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*
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* The object is returned with refcounter increased by 1.
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*
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* Return: the requested neigh_ifinfo or NULL if not found
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*/
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struct batadv_neigh_ifinfo *
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batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh,
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struct batadv_hard_iface *if_outgoing)
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{
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struct batadv_neigh_ifinfo *neigh_ifinfo = NULL,
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*tmp_neigh_ifinfo;
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rcu_read_lock();
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hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list,
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list) {
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if (tmp_neigh_ifinfo->if_outgoing != if_outgoing)
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continue;
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if (!kref_get_unless_zero(&tmp_neigh_ifinfo->refcount))
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continue;
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neigh_ifinfo = tmp_neigh_ifinfo;
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break;
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}
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rcu_read_unlock();
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return neigh_ifinfo;
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}
|
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|
|
/**
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* batadv_neigh_ifinfo_new() - search and possibly create an neigh_ifinfo object
|
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* @neigh: the neigh node to be queried
|
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* @if_outgoing: the interface for which the ifinfo should be acquired
|
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*
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* Return: NULL in case of failure or the neigh_ifinfo object for the
|
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* if_outgoing interface otherwise. The object is created and added to the list
|
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* if it does not exist.
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*
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* The object is returned with refcounter increased by 1.
|
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*/
|
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struct batadv_neigh_ifinfo *
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batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh,
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struct batadv_hard_iface *if_outgoing)
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{
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struct batadv_neigh_ifinfo *neigh_ifinfo;
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spin_lock_bh(&neigh->ifinfo_lock);
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neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing);
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if (neigh_ifinfo)
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|
goto out;
|
|
|
|
neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC);
|
|
if (!neigh_ifinfo)
|
|
goto out;
|
|
|
|
if (if_outgoing)
|
|
kref_get(&if_outgoing->refcount);
|
|
|
|
INIT_HLIST_NODE(&neigh_ifinfo->list);
|
|
kref_init(&neigh_ifinfo->refcount);
|
|
neigh_ifinfo->if_outgoing = if_outgoing;
|
|
|
|
kref_get(&neigh_ifinfo->refcount);
|
|
hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list);
|
|
|
|
out:
|
|
spin_unlock_bh(&neigh->ifinfo_lock);
|
|
|
|
return neigh_ifinfo;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* Return: neighbor when found. Otherwise NULL
|
|
*/
|
|
static struct batadv_neigh_node *
|
|
batadv_neigh_node_get(const struct batadv_orig_node *orig_node,
|
|
const struct batadv_hard_iface *hard_iface,
|
|
const u8 *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 (!kref_get_unless_zero(&tmp_neigh_node->refcount))
|
|
continue;
|
|
|
|
res = tmp_neigh_node;
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* batadv_hardif_neigh_create() - create a hardif neighbour node
|
|
* @hard_iface: the interface this neighbour is connected to
|
|
* @neigh_addr: the interface address of the neighbour to retrieve
|
|
* @orig_node: originator object representing the neighbour
|
|
*
|
|
* Return: the hardif neighbour node if found or created or NULL otherwise.
|
|
*/
|
|
static struct batadv_hardif_neigh_node *
|
|
batadv_hardif_neigh_create(struct batadv_hard_iface *hard_iface,
|
|
const u8 *neigh_addr,
|
|
struct batadv_orig_node *orig_node)
|
|
{
|
|
struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
|
|
struct batadv_hardif_neigh_node *hardif_neigh;
|
|
|
|
spin_lock_bh(&hard_iface->neigh_list_lock);
|
|
|
|
/* check if neighbor hasn't been added in the meantime */
|
|
hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr);
|
|
if (hardif_neigh)
|
|
goto out;
|
|
|
|
hardif_neigh = kzalloc(sizeof(*hardif_neigh), GFP_ATOMIC);
|
|
if (!hardif_neigh)
|
|
goto out;
|
|
|
|
kref_get(&hard_iface->refcount);
|
|
INIT_HLIST_NODE(&hardif_neigh->list);
|
|
ether_addr_copy(hardif_neigh->addr, neigh_addr);
|
|
ether_addr_copy(hardif_neigh->orig, orig_node->orig);
|
|
hardif_neigh->if_incoming = hard_iface;
|
|
hardif_neigh->last_seen = jiffies;
|
|
|
|
kref_init(&hardif_neigh->refcount);
|
|
|
|
if (bat_priv->algo_ops->neigh.hardif_init)
|
|
bat_priv->algo_ops->neigh.hardif_init(hardif_neigh);
|
|
|
|
hlist_add_head_rcu(&hardif_neigh->list, &hard_iface->neigh_list);
|
|
|
|
out:
|
|
spin_unlock_bh(&hard_iface->neigh_list_lock);
|
|
return hardif_neigh;
|
|
}
|
|
|
|
/**
|
|
* batadv_hardif_neigh_get_or_create() - retrieve or create a hardif neighbour
|
|
* node
|
|
* @hard_iface: the interface this neighbour is connected to
|
|
* @neigh_addr: the interface address of the neighbour to retrieve
|
|
* @orig_node: originator object representing the neighbour
|
|
*
|
|
* Return: the hardif neighbour node if found or created or NULL otherwise.
|
|
*/
|
|
static struct batadv_hardif_neigh_node *
|
|
batadv_hardif_neigh_get_or_create(struct batadv_hard_iface *hard_iface,
|
|
const u8 *neigh_addr,
|
|
struct batadv_orig_node *orig_node)
|
|
{
|
|
struct batadv_hardif_neigh_node *hardif_neigh;
|
|
|
|
/* first check without locking to avoid the overhead */
|
|
hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr);
|
|
if (hardif_neigh)
|
|
return hardif_neigh;
|
|
|
|
return batadv_hardif_neigh_create(hard_iface, neigh_addr, orig_node);
|
|
}
|
|
|
|
/**
|
|
* batadv_hardif_neigh_get() - retrieve a hardif neighbour from the list
|
|
* @hard_iface: the interface where this neighbour is connected to
|
|
* @neigh_addr: the address of the neighbour
|
|
*
|
|
* Looks for and possibly returns a neighbour belonging to this hard interface.
|
|
*
|
|
* Return: neighbor when found. Otherwise NULL
|
|
*/
|
|
struct batadv_hardif_neigh_node *
|
|
batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface,
|
|
const u8 *neigh_addr)
|
|
{
|
|
struct batadv_hardif_neigh_node *tmp_hardif_neigh, *hardif_neigh = NULL;
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(tmp_hardif_neigh,
|
|
&hard_iface->neigh_list, list) {
|
|
if (!batadv_compare_eth(tmp_hardif_neigh->addr, neigh_addr))
|
|
continue;
|
|
|
|
if (!kref_get_unless_zero(&tmp_hardif_neigh->refcount))
|
|
continue;
|
|
|
|
hardif_neigh = tmp_hardif_neigh;
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return hardif_neigh;
|
|
}
|
|
|
|
/**
|
|
* batadv_neigh_node_create() - create a neigh node object
|
|
* @orig_node: originator object representing the neighbour
|
|
* @hard_iface: the interface where the neighbour is connected to
|
|
* @neigh_addr: the mac address of the neighbour interface
|
|
*
|
|
* Allocates a new neigh_node object and initialises all the generic fields.
|
|
*
|
|
* Return: the neighbour node if found or created or NULL otherwise.
|
|
*/
|
|
static struct batadv_neigh_node *
|
|
batadv_neigh_node_create(struct batadv_orig_node *orig_node,
|
|
struct batadv_hard_iface *hard_iface,
|
|
const u8 *neigh_addr)
|
|
{
|
|
struct batadv_neigh_node *neigh_node;
|
|
struct batadv_hardif_neigh_node *hardif_neigh = NULL;
|
|
|
|
spin_lock_bh(&orig_node->neigh_list_lock);
|
|
|
|
neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr);
|
|
if (neigh_node)
|
|
goto out;
|
|
|
|
hardif_neigh = batadv_hardif_neigh_get_or_create(hard_iface,
|
|
neigh_addr, orig_node);
|
|
if (!hardif_neigh)
|
|
goto out;
|
|
|
|
neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC);
|
|
if (!neigh_node)
|
|
goto out;
|
|
|
|
INIT_HLIST_NODE(&neigh_node->list);
|
|
INIT_HLIST_HEAD(&neigh_node->ifinfo_list);
|
|
spin_lock_init(&neigh_node->ifinfo_lock);
|
|
|
|
kref_get(&hard_iface->refcount);
|
|
ether_addr_copy(neigh_node->addr, neigh_addr);
|
|
neigh_node->if_incoming = hard_iface;
|
|
neigh_node->orig_node = orig_node;
|
|
neigh_node->last_seen = jiffies;
|
|
|
|
/* increment unique neighbor refcount */
|
|
kref_get(&hardif_neigh->refcount);
|
|
neigh_node->hardif_neigh = hardif_neigh;
|
|
|
|
/* extra reference for return */
|
|
kref_init(&neigh_node->refcount);
|
|
|
|
kref_get(&neigh_node->refcount);
|
|
hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list);
|
|
|
|
batadv_dbg(BATADV_DBG_BATMAN, orig_node->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:
|
|
spin_unlock_bh(&orig_node->neigh_list_lock);
|
|
|
|
if (hardif_neigh)
|
|
batadv_hardif_neigh_put(hardif_neigh);
|
|
return neigh_node;
|
|
}
|
|
|
|
/**
|
|
* batadv_neigh_node_get_or_create() - retrieve or create a neigh node object
|
|
* @orig_node: originator object representing the neighbour
|
|
* @hard_iface: the interface where the neighbour is connected to
|
|
* @neigh_addr: the mac address of the neighbour interface
|
|
*
|
|
* Return: the neighbour node if found or created or NULL otherwise.
|
|
*/
|
|
struct batadv_neigh_node *
|
|
batadv_neigh_node_get_or_create(struct batadv_orig_node *orig_node,
|
|
struct batadv_hard_iface *hard_iface,
|
|
const u8 *neigh_addr)
|
|
{
|
|
struct batadv_neigh_node *neigh_node;
|
|
|
|
/* first check without locking to avoid the overhead */
|
|
neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr);
|
|
if (neigh_node)
|
|
return neigh_node;
|
|
|
|
return batadv_neigh_node_create(orig_node, hard_iface, neigh_addr);
|
|
}
|
|
|
|
/**
|
|
* batadv_hardif_neigh_dump() - Dump to netlink the neighbor infos for a
|
|
* specific outgoing interface
|
|
* @msg: message to dump into
|
|
* @cb: parameters for the dump
|
|
*
|
|
* Return: 0 or error value
|
|
*/
|
|
int batadv_hardif_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb)
|
|
{
|
|
struct net *net = sock_net(cb->skb->sk);
|
|
struct net_device *soft_iface;
|
|
struct net_device *hard_iface = NULL;
|
|
struct batadv_hard_iface *hardif = BATADV_IF_DEFAULT;
|
|
struct batadv_priv *bat_priv;
|
|
struct batadv_hard_iface *primary_if = NULL;
|
|
int ret;
|
|
int ifindex, hard_ifindex;
|
|
|
|
ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
|
|
if (!ifindex)
|
|
return -EINVAL;
|
|
|
|
soft_iface = dev_get_by_index(net, ifindex);
|
|
if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
bat_priv = netdev_priv(soft_iface);
|
|
|
|
primary_if = batadv_primary_if_get_selected(bat_priv);
|
|
if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
hard_ifindex = batadv_netlink_get_ifindex(cb->nlh,
|
|
BATADV_ATTR_HARD_IFINDEX);
|
|
if (hard_ifindex) {
|
|
hard_iface = dev_get_by_index(net, hard_ifindex);
|
|
if (hard_iface)
|
|
hardif = batadv_hardif_get_by_netdev(hard_iface);
|
|
|
|
if (!hardif) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
if (hardif->soft_iface != soft_iface) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (!bat_priv->algo_ops->neigh.dump) {
|
|
ret = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
|
|
bat_priv->algo_ops->neigh.dump(msg, cb, bat_priv, hardif);
|
|
|
|
ret = msg->len;
|
|
|
|
out:
|
|
if (hardif)
|
|
batadv_hardif_put(hardif);
|
|
if (hard_iface)
|
|
dev_put(hard_iface);
|
|
if (primary_if)
|
|
batadv_hardif_put(primary_if);
|
|
if (soft_iface)
|
|
dev_put(soft_iface);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* batadv_orig_ifinfo_release() - release orig_ifinfo from lists and queue for
|
|
* free after rcu grace period
|
|
* @ref: kref pointer of the orig_ifinfo
|
|
*/
|
|
static void batadv_orig_ifinfo_release(struct kref *ref)
|
|
{
|
|
struct batadv_orig_ifinfo *orig_ifinfo;
|
|
struct batadv_neigh_node *router;
|
|
|
|
orig_ifinfo = container_of(ref, struct batadv_orig_ifinfo, refcount);
|
|
|
|
if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT)
|
|
batadv_hardif_put(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_put(router);
|
|
|
|
kfree_rcu(orig_ifinfo, rcu);
|
|
}
|
|
|
|
/**
|
|
* batadv_orig_ifinfo_put() - decrement the refcounter and possibly release
|
|
* the orig_ifinfo
|
|
* @orig_ifinfo: the orig_ifinfo object to release
|
|
*/
|
|
void batadv_orig_ifinfo_put(struct batadv_orig_ifinfo *orig_ifinfo)
|
|
{
|
|
kref_put(&orig_ifinfo->refcount, batadv_orig_ifinfo_release);
|
|
}
|
|
|
|
/**
|
|
* batadv_orig_node_free_rcu() - free the orig_node
|
|
* @rcu: rcu pointer of the orig_node
|
|
*/
|
|
static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
|
|
{
|
|
struct batadv_orig_node *orig_node;
|
|
|
|
orig_node = container_of(rcu, struct batadv_orig_node, rcu);
|
|
|
|
batadv_mcast_purge_orig(orig_node);
|
|
|
|
batadv_frag_purge_orig(orig_node, NULL);
|
|
|
|
kfree(orig_node->tt_buff);
|
|
kfree(orig_node);
|
|
}
|
|
|
|
/**
|
|
* batadv_orig_node_release() - release orig_node from lists and queue for
|
|
* free after rcu grace period
|
|
* @ref: kref pointer of the orig_node
|
|
*/
|
|
static void batadv_orig_node_release(struct kref *ref)
|
|
{
|
|
struct hlist_node *node_tmp;
|
|
struct batadv_neigh_node *neigh_node;
|
|
struct batadv_orig_node *orig_node;
|
|
struct batadv_orig_ifinfo *orig_ifinfo;
|
|
struct batadv_orig_node_vlan *vlan;
|
|
struct batadv_orig_ifinfo *last_candidate;
|
|
|
|
orig_node = container_of(ref, struct batadv_orig_node, refcount);
|
|
|
|
spin_lock_bh(&orig_node->neigh_list_lock);
|
|
|
|
/* 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_put(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_put(orig_ifinfo);
|
|
}
|
|
|
|
last_candidate = orig_node->last_bonding_candidate;
|
|
orig_node->last_bonding_candidate = NULL;
|
|
spin_unlock_bh(&orig_node->neigh_list_lock);
|
|
|
|
if (last_candidate)
|
|
batadv_orig_ifinfo_put(last_candidate);
|
|
|
|
spin_lock_bh(&orig_node->vlan_list_lock);
|
|
hlist_for_each_entry_safe(vlan, node_tmp, &orig_node->vlan_list, list) {
|
|
hlist_del_rcu(&vlan->list);
|
|
batadv_orig_node_vlan_put(vlan);
|
|
}
|
|
spin_unlock_bh(&orig_node->vlan_list_lock);
|
|
|
|
/* Free nc_nodes */
|
|
batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL);
|
|
|
|
call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu);
|
|
}
|
|
|
|
/**
|
|
* batadv_orig_node_put() - decrement the orig node refcounter and possibly
|
|
* release it
|
|
* @orig_node: the orig node to free
|
|
*/
|
|
void batadv_orig_node_put(struct batadv_orig_node *orig_node)
|
|
{
|
|
kref_put(&orig_node->refcount, batadv_orig_node_release);
|
|
}
|
|
|
|
/**
|
|
* batadv_originator_free() - Free all originator structures
|
|
* @bat_priv: the bat priv with all the soft interface information
|
|
*/
|
|
void batadv_originator_free(struct batadv_priv *bat_priv)
|
|
{
|
|
struct batadv_hashtable *hash = bat_priv->orig_hash;
|
|
struct hlist_node *node_tmp;
|
|
struct hlist_head *head;
|
|
spinlock_t *list_lock; /* spinlock to protect write access */
|
|
struct batadv_orig_node *orig_node;
|
|
u32 i;
|
|
|
|
if (!hash)
|
|
return;
|
|
|
|
cancel_delayed_work_sync(&bat_priv->orig_work);
|
|
|
|
bat_priv->orig_hash = NULL;
|
|
|
|
for (i = 0; i < hash->size; i++) {
|
|
head = &hash->table[i];
|
|
list_lock = &hash->list_locks[i];
|
|
|
|
spin_lock_bh(list_lock);
|
|
hlist_for_each_entry_safe(orig_node, node_tmp,
|
|
head, hash_entry) {
|
|
hlist_del_rcu(&orig_node->hash_entry);
|
|
batadv_orig_node_put(orig_node);
|
|
}
|
|
spin_unlock_bh(list_lock);
|
|
}
|
|
|
|
batadv_hash_destroy(hash);
|
|
}
|
|
|
|
/**
|
|
* batadv_orig_node_new() - creates a new orig_node
|
|
* @bat_priv: the bat priv with all the soft interface information
|
|
* @addr: the mac address of the originator
|
|
*
|
|
* Creates a new originator object and initialises all the generic fields.
|
|
* The new object is not added to the originator list.
|
|
*
|
|
* Return: the newly created object or NULL on failure.
|
|
*/
|
|
struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv,
|
|
const u8 *addr)
|
|
{
|
|
struct batadv_orig_node *orig_node;
|
|
struct batadv_orig_node_vlan *vlan;
|
|
unsigned long reset_time;
|
|
int i;
|
|
|
|
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
|
|
"Creating new originator: %pM\n", addr);
|
|
|
|
orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC);
|
|
if (!orig_node)
|
|
return NULL;
|
|
|
|
INIT_HLIST_HEAD(&orig_node->neigh_list);
|
|
INIT_HLIST_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);
|
|
spin_lock_init(&orig_node->tt_lock);
|
|
spin_lock_init(&orig_node->vlan_list_lock);
|
|
|
|
batadv_nc_init_orig(orig_node);
|
|
|
|
/* extra reference for return */
|
|
kref_init(&orig_node->refcount);
|
|
|
|
orig_node->bat_priv = bat_priv;
|
|
ether_addr_copy(orig_node->orig, addr);
|
|
batadv_dat_init_orig_node_addr(orig_node);
|
|
atomic_set(&orig_node->last_ttvn, 0);
|
|
orig_node->tt_buff = NULL;
|
|
orig_node->tt_buff_len = 0;
|
|
orig_node->last_seen = jiffies;
|
|
reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
|
|
orig_node->bcast_seqno_reset = reset_time;
|
|
|
|
#ifdef CONFIG_BATMAN_ADV_MCAST
|
|
orig_node->mcast_flags = BATADV_MCAST_WANT_NO_RTR4;
|
|
orig_node->mcast_flags |= BATADV_MCAST_WANT_NO_RTR6;
|
|
INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node);
|
|
INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node);
|
|
INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node);
|
|
spin_lock_init(&orig_node->mcast_handler_lock);
|
|
#endif
|
|
|
|
/* create a vlan object for the "untagged" LAN */
|
|
vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS);
|
|
if (!vlan)
|
|
goto free_orig_node;
|
|
/* batadv_orig_node_vlan_new() increases the refcounter.
|
|
* Immediately release vlan since it is not needed anymore in this
|
|
* context
|
|
*/
|
|
batadv_orig_node_vlan_put(vlan);
|
|
|
|
for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) {
|
|
INIT_HLIST_HEAD(&orig_node->fragments[i].fragment_list);
|
|
spin_lock_init(&orig_node->fragments[i].lock);
|
|
orig_node->fragments[i].size = 0;
|
|
}
|
|
|
|
return orig_node;
|
|
free_orig_node:
|
|
kfree(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_put(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
|
|
*
|
|
* Return: 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_put(orig_ifinfo);
|
|
if (orig_node->last_bonding_candidate == orig_ifinfo) {
|
|
orig_node->last_bonding_candidate = NULL;
|
|
batadv_orig_ifinfo_put(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
|
|
*
|
|
* Return: 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 hlist_node *node_tmp;
|
|
struct batadv_neigh_node *neigh_node;
|
|
bool neigh_purged = false;
|
|
unsigned long last_seen;
|
|
struct batadv_hard_iface *if_incoming;
|
|
|
|
spin_lock_bh(&orig_node->neigh_list_lock);
|
|
|
|
/* for all neighbors towards this originator ... */
|
|
hlist_for_each_entry_safe(neigh_node, node_tmp,
|
|
&orig_node->neigh_list, list) {
|
|
last_seen = neigh_node->last_seen;
|
|
if_incoming = neigh_node->if_incoming;
|
|
|
|
if (batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT) ||
|
|
if_incoming->if_status == BATADV_IF_INACTIVE ||
|
|
if_incoming->if_status == BATADV_IF_NOT_IN_USE ||
|
|
if_incoming->if_status == BATADV_IF_TO_BE_REMOVED) {
|
|
if (if_incoming->if_status == BATADV_IF_INACTIVE ||
|
|
if_incoming->if_status == BATADV_IF_NOT_IN_USE ||
|
|
if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)
|
|
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
|
|
"neighbor purge: originator %pM, neighbor: %pM, iface: %s\n",
|
|
orig_node->orig, neigh_node->addr,
|
|
if_incoming->net_dev->name);
|
|
else
|
|
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
|
|
"neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
|
|
orig_node->orig, neigh_node->addr,
|
|
jiffies_to_msecs(last_seen));
|
|
|
|
neigh_purged = true;
|
|
|
|
hlist_del_rcu(&neigh_node->list);
|
|
batadv_neigh_node_put(neigh_node);
|
|
} else {
|
|
/* only necessary if not the whole neighbor is to be
|
|
* deleted, but some interface has been removed.
|
|
*/
|
|
batadv_purge_neigh_ifinfo(bat_priv, neigh_node);
|
|
}
|
|
}
|
|
|
|
spin_unlock_bh(&orig_node->neigh_list_lock);
|
|
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
|
|
*
|
|
* Return: 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->algo_ops;
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) {
|
|
if (best && (bao->neigh.cmp(neigh, if_outgoing, best,
|
|
if_outgoing) <= 0))
|
|
continue;
|
|
|
|
if (!kref_get_unless_zero(&neigh->refcount))
|
|
continue;
|
|
|
|
if (best)
|
|
batadv_neigh_node_put(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.
|
|
*
|
|
* Return: 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)) {
|
|
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
|
|
"Originator timeout: originator %pM, last_seen %u\n",
|
|
orig_node->orig,
|
|
jiffies_to_msecs(orig_node->last_seen));
|
|
return true;
|
|
}
|
|
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_put(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;
|
|
|
|
if (!kref_get_unless_zero(&hard_iface->refcount))
|
|
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_put(best_neigh_node);
|
|
|
|
batadv_hardif_put(hard_iface);
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* batadv_purge_orig_ref() - Purge all outdated originators
|
|
* @bat_priv: the bat priv with all the soft interface information
|
|
*/
|
|
void batadv_purge_orig_ref(struct batadv_priv *bat_priv)
|
|
{
|
|
struct batadv_hashtable *hash = bat_priv->orig_hash;
|
|
struct hlist_node *node_tmp;
|
|
struct hlist_head *head;
|
|
spinlock_t *list_lock; /* spinlock to protect write access */
|
|
struct batadv_orig_node *orig_node;
|
|
u32 i;
|
|
|
|
if (!hash)
|
|
return;
|
|
|
|
/* for all origins... */
|
|
for (i = 0; i < hash->size; i++) {
|
|
head = &hash->table[i];
|
|
list_lock = &hash->list_locks[i];
|
|
|
|
spin_lock_bh(list_lock);
|
|
hlist_for_each_entry_safe(orig_node, node_tmp,
|
|
head, hash_entry) {
|
|
if (batadv_purge_orig_node(bat_priv, orig_node)) {
|
|
batadv_gw_node_delete(bat_priv, orig_node);
|
|
hlist_del_rcu(&orig_node->hash_entry);
|
|
batadv_tt_global_del_orig(orig_node->bat_priv,
|
|
orig_node, -1,
|
|
"originator timed out");
|
|
batadv_orig_node_put(orig_node);
|
|
continue;
|
|
}
|
|
|
|
batadv_frag_purge_orig(orig_node,
|
|
batadv_frag_check_entry);
|
|
}
|
|
spin_unlock_bh(list_lock);
|
|
}
|
|
|
|
batadv_gw_election(bat_priv);
|
|
}
|
|
|
|
static void batadv_purge_orig(struct work_struct *work)
|
|
{
|
|
struct delayed_work *delayed_work;
|
|
struct batadv_priv *bat_priv;
|
|
|
|
delayed_work = to_delayed_work(work);
|
|
bat_priv = container_of(delayed_work, struct batadv_priv, orig_work);
|
|
batadv_purge_orig_ref(bat_priv);
|
|
queue_delayed_work(batadv_event_workqueue,
|
|
&bat_priv->orig_work,
|
|
msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
|
|
}
|
|
|
|
/**
|
|
* batadv_orig_dump() - Dump to netlink the originator infos for a specific
|
|
* outgoing interface
|
|
* @msg: message to dump into
|
|
* @cb: parameters for the dump
|
|
*
|
|
* Return: 0 or error value
|
|
*/
|
|
int batadv_orig_dump(struct sk_buff *msg, struct netlink_callback *cb)
|
|
{
|
|
struct net *net = sock_net(cb->skb->sk);
|
|
struct net_device *soft_iface;
|
|
struct net_device *hard_iface = NULL;
|
|
struct batadv_hard_iface *hardif = BATADV_IF_DEFAULT;
|
|
struct batadv_priv *bat_priv;
|
|
struct batadv_hard_iface *primary_if = NULL;
|
|
int ret;
|
|
int ifindex, hard_ifindex;
|
|
|
|
ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
|
|
if (!ifindex)
|
|
return -EINVAL;
|
|
|
|
soft_iface = dev_get_by_index(net, ifindex);
|
|
if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
bat_priv = netdev_priv(soft_iface);
|
|
|
|
primary_if = batadv_primary_if_get_selected(bat_priv);
|
|
if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
hard_ifindex = batadv_netlink_get_ifindex(cb->nlh,
|
|
BATADV_ATTR_HARD_IFINDEX);
|
|
if (hard_ifindex) {
|
|
hard_iface = dev_get_by_index(net, hard_ifindex);
|
|
if (hard_iface)
|
|
hardif = batadv_hardif_get_by_netdev(hard_iface);
|
|
|
|
if (!hardif) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
if (hardif->soft_iface != soft_iface) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (!bat_priv->algo_ops->orig.dump) {
|
|
ret = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
|
|
bat_priv->algo_ops->orig.dump(msg, cb, bat_priv, hardif);
|
|
|
|
ret = msg->len;
|
|
|
|
out:
|
|
if (hardif)
|
|
batadv_hardif_put(hardif);
|
|
if (hard_iface)
|
|
dev_put(hard_iface);
|
|
if (primary_if)
|
|
batadv_hardif_put(primary_if);
|
|
if (soft_iface)
|
|
dev_put(soft_iface);
|
|
|
|
return ret;
|
|
}
|