![Linus Lüssing](/assets/img/avatar_default.png)
Two parallel calls to batadv_neigh_node_new() might race for creating
and adding the same neig_node. Fix this by including the check for any
already existing, identical neigh_node within the spin-lock.
This fixes splats like the following:
[ 739.535069] ------------[ cut here ]------------
[ 739.535079] WARNING: CPU: 0 PID: 0 at /usr/src/batman-adv/git/batman-adv/net/batman-adv/bat_iv_ogm.c:1004 batadv_iv_ogm_process_per_outif+0xe3f/0xe60 [batman_adv]()
[ 739.535092] too many matching neigh_nodes
[ 739.535094] Modules linked in: dm_mod tun ip6table_filter ip6table_mangle ip6table_nat nf_nat_ipv6 ip6_tables xt_nat iptable_nat nf_nat_ipv4 nf_nat xt_TCPMSS xt_mark iptable_mangle xt_tcpudp xt_conntrack iptable_filter ip_tables x_tables ip_gre ip_tunnel gre bridge stp llc thermal_sys kvm_intel kvm crct10dif_pclmul crc32_pclmul sha256_ssse3 sha256_generic hmac drbg ansi_cprng aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd evdev pcspkr ip6_gre ip6_tunnel tunnel6 batman_adv(O) libcrc32c nf_conntrack_ipv6 nf_defrag_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack autofs4 ext4 crc16 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
[ 739.535177] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W O 4.2.0-0.bpo.1-amd64 #1 Debian 4.2.6-3~bpo8+2
[ 739.535186] 0000000000000000 ffffffffa013b050 ffffffff81554521 ffff88007d003c18
[ 739.535201] ffffffff8106fa01 0000000000000000 ffff8800047a087a ffff880079c3a000
[ 739.735602] ffff88007b82bf40 ffff88007bc2d1c0 ffffffff8106fa7a ffffffffa013aa8e
[ 739.735624] Call Trace:
[ 739.735639] <IRQ> [<ffffffff81554521>] ? dump_stack+0x40/0x50
[ 739.735677] [<ffffffff8106fa01>] ? warn_slowpath_common+0x81/0xb0
[ 739.735692] [<ffffffff8106fa7a>] ? warn_slowpath_fmt+0x4a/0x50
[ 739.735715] [<ffffffffa012448f>] ? batadv_iv_ogm_process_per_outif+0xe3f/0xe60 [batman_adv]
[ 739.735740] [<ffffffffa0124813>] ? batadv_iv_ogm_receive+0x363/0x380 [batman_adv]
[ 739.735762] [<ffffffffa0124813>] ? batadv_iv_ogm_receive+0x363/0x380 [batman_adv]
[ 739.735783] [<ffffffff810b0841>] ? __raw_callee_save___pv_queued_spin_unlock+0x11/0x20
[ 739.735804] [<ffffffffa012cb39>] ? batadv_batman_skb_recv+0xc9/0x110 [batman_adv]
[ 739.735825] [<ffffffff81464891>] ? __netif_receive_skb_core+0x841/0x9a0
[ 739.735838] [<ffffffff810b0841>] ? __raw_callee_save___pv_queued_spin_unlock+0x11/0x20
[ 739.735853] [<ffffffff81465681>] ? process_backlog+0xa1/0x140
[ 739.735864] [<ffffffff81464f1a>] ? net_rx_action+0x20a/0x320
[ 739.735878] [<ffffffff81073aa7>] ? __do_softirq+0x107/0x270
[ 739.735891] [<ffffffff81073d82>] ? irq_exit+0x92/0xa0
[ 739.735905] [<ffffffff8137e0d1>] ? xen_evtchn_do_upcall+0x31/0x40
[ 739.735924] [<ffffffff8155b8fe>] ? xen_do_hypervisor_callback+0x1e/0x40
[ 739.735939] <EOI> [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
[ 739.735965] [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
[ 739.735979] [<ffffffff8100a39c>] ? xen_safe_halt+0xc/0x20
[ 739.735991] [<ffffffff8101da6c>] ? default_idle+0x1c/0xa0
[ 739.736004] [<ffffffff810abf6b>] ? cpu_startup_entry+0x2eb/0x350
[ 739.736019] [<ffffffff81b2af5e>] ? start_kernel+0x480/0x48b
[ 739.736032] [<ffffffff81b2d116>] ? xen_start_kernel+0x507/0x511
[ 739.736048] ---[ end trace c106bb901244bc8c ]---
Fixes: f987ed6ebd
("batman-adv: protect neighbor list with rcu locks")
Reported-by: Martin Weinelt <martin@darmstadt.freifunk.net>
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
1390 lines
38 KiB
C
1390 lines
38 KiB
C
/* Copyright (C) 2009-2016 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, see <http://www.gnu.org/licenses/>.
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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/fs.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/rculist.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/workqueue.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 "multicast.h"
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#include "network-coding.h"
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#include "routing.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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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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kref_get(&vlan->refcount);
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vlan->vid = vid;
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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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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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struct batadv_algo_ops *bao;
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neigh_node = container_of(ref, struct batadv_neigh_node, refcount);
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bao = neigh_node->orig_node->bat_priv->bat_algo_ops;
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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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if (bao->bat_neigh_free)
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bao->bat_neigh_free(neigh_node);
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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 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 = NULL;
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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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*
|
|
* Return: the requested neigh_ifinfo or NULL if not found
|
|
*/
|
|
struct batadv_neigh_ifinfo *
|
|
batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh,
|
|
struct batadv_hard_iface *if_outgoing)
|
|
{
|
|
struct batadv_neigh_ifinfo *neigh_ifinfo = NULL,
|
|
*tmp_neigh_ifinfo;
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list,
|
|
list) {
|
|
if (tmp_neigh_ifinfo->if_outgoing != if_outgoing)
|
|
continue;
|
|
|
|
if (!kref_get_unless_zero(&tmp_neigh_ifinfo->refcount))
|
|
continue;
|
|
|
|
neigh_ifinfo = tmp_neigh_ifinfo;
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return neigh_ifinfo;
|
|
}
|
|
|
|
/**
|
|
* batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object
|
|
* @neigh: the neigh node to be queried
|
|
* @if_outgoing: the interface for which the ifinfo should be acquired
|
|
*
|
|
* Return: NULL in case of failure or the neigh_ifinfo object for the
|
|
* if_outgoing interface otherwise. The object is created and added to the list
|
|
* if it does not exist.
|
|
*
|
|
* The object is returned with refcounter increased by 1.
|
|
*/
|
|
struct batadv_neigh_ifinfo *
|
|
batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh,
|
|
struct batadv_hard_iface *if_outgoing)
|
|
{
|
|
struct batadv_neigh_ifinfo *neigh_ifinfo;
|
|
|
|
spin_lock_bh(&neigh->ifinfo_lock);
|
|
|
|
neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing);
|
|
if (neigh_ifinfo)
|
|
goto out;
|
|
|
|
neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC);
|
|
if (!neigh_ifinfo)
|
|
goto out;
|
|
|
|
if (if_outgoing)
|
|
kref_get(&if_outgoing->refcount);
|
|
|
|
INIT_HLIST_NODE(&neigh_ifinfo->list);
|
|
kref_init(&neigh_ifinfo->refcount);
|
|
kref_get(&neigh_ifinfo->refcount);
|
|
neigh_ifinfo->if_outgoing = if_outgoing;
|
|
|
|
hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list);
|
|
|
|
out:
|
|
spin_unlock_bh(&neigh->ifinfo_lock);
|
|
|
|
return neigh_ifinfo;
|
|
}
|
|
|
|
/**
|
|
* batadv_neigh_node_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. Othwerwise 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
|
|
*
|
|
* 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_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
|
|
struct batadv_hardif_neigh_node *hardif_neigh = NULL;
|
|
|
|
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);
|
|
hardif_neigh->if_incoming = hard_iface;
|
|
hardif_neigh->last_seen = jiffies;
|
|
|
|
kref_init(&hardif_neigh->refcount);
|
|
|
|
if (bat_priv->bat_algo_ops->bat_hardif_neigh_init)
|
|
bat_priv->bat_algo_ops->bat_hardif_neigh_init(hardif_neigh);
|
|
|
|
hlist_add_head(&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
|
|
*
|
|
* 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_hardif_neigh_node *hardif_neigh = NULL;
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/**
|
|
* 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. Othwerwise 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_new - create and init a new 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: neighbor when found. Othwerwise NULL
|
|
*/
|
|
struct batadv_neigh_node *
|
|
batadv_neigh_node_new(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);
|
|
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_hardif_neigh_seq_print_text - print the single hop neighbour list
|
|
* @seq: neighbour table seq_file struct
|
|
* @offset: not used
|
|
*
|
|
* Return: always 0
|
|
*/
|
|
int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset)
|
|
{
|
|
struct net_device *net_dev = (struct net_device *)seq->private;
|
|
struct batadv_priv *bat_priv = netdev_priv(net_dev);
|
|
struct batadv_hard_iface *primary_if;
|
|
|
|
primary_if = batadv_seq_print_text_primary_if_get(seq);
|
|
if (!primary_if)
|
|
return 0;
|
|
|
|
seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
|
|
BATADV_SOURCE_VERSION, primary_if->net_dev->name,
|
|
primary_if->net_dev->dev_addr, net_dev->name,
|
|
bat_priv->bat_algo_ops->name);
|
|
|
|
batadv_hardif_put(primary_if);
|
|
|
|
if (!bat_priv->bat_algo_ops->bat_neigh_print) {
|
|
seq_puts(seq,
|
|
"No printing function for this routing protocol\n");
|
|
return 0;
|
|
}
|
|
|
|
bat_priv->bat_algo_ops->bat_neigh_print(bat_priv, seq);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
|
|
if (orig_node->bat_priv->bat_algo_ops->bat_orig_free)
|
|
orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node);
|
|
|
|
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;
|
|
|
|
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);
|
|
}
|
|
spin_unlock_bh(&orig_node->neigh_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);
|
|
}
|
|
|
|
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 initialise 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);
|
|
kref_get(&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_NO_FLAGS;
|
|
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].head);
|
|
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->bat_algo_ops;
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) {
|
|
if (best && (bao->bat_neigh_cmp(neigh, if_outgoing,
|
|
best, if_outgoing) <= 0))
|
|
continue;
|
|
|
|
if (!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;
|
|
}
|
|
|
|
static void _batadv_purge_orig(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(bat_priv);
|
|
queue_delayed_work(batadv_event_workqueue,
|
|
&bat_priv->orig_work,
|
|
msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
|
|
}
|
|
|
|
void batadv_purge_orig_ref(struct batadv_priv *bat_priv)
|
|
{
|
|
_batadv_purge_orig(bat_priv);
|
|
}
|
|
|
|
int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
|
|
{
|
|
struct net_device *net_dev = (struct net_device *)seq->private;
|
|
struct batadv_priv *bat_priv = netdev_priv(net_dev);
|
|
struct batadv_hard_iface *primary_if;
|
|
|
|
primary_if = batadv_seq_print_text_primary_if_get(seq);
|
|
if (!primary_if)
|
|
return 0;
|
|
|
|
seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
|
|
BATADV_SOURCE_VERSION, primary_if->net_dev->name,
|
|
primary_if->net_dev->dev_addr, net_dev->name,
|
|
bat_priv->bat_algo_ops->name);
|
|
|
|
batadv_hardif_put(primary_if);
|
|
|
|
if (!bat_priv->bat_algo_ops->bat_orig_print) {
|
|
seq_puts(seq,
|
|
"No printing function for this routing protocol\n");
|
|
return 0;
|
|
}
|
|
|
|
bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq,
|
|
BATADV_IF_DEFAULT);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* batadv_orig_hardif_seq_print_text - writes originator infos for a specific
|
|
* outgoing interface
|
|
* @seq: debugfs table seq_file struct
|
|
* @offset: not used
|
|
*
|
|
* Return: 0
|
|
*/
|
|
int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset)
|
|
{
|
|
struct net_device *net_dev = (struct net_device *)seq->private;
|
|
struct batadv_hard_iface *hard_iface;
|
|
struct batadv_priv *bat_priv;
|
|
|
|
hard_iface = batadv_hardif_get_by_netdev(net_dev);
|
|
|
|
if (!hard_iface || !hard_iface->soft_iface) {
|
|
seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n");
|
|
goto out;
|
|
}
|
|
|
|
bat_priv = netdev_priv(hard_iface->soft_iface);
|
|
if (!bat_priv->bat_algo_ops->bat_orig_print) {
|
|
seq_puts(seq,
|
|
"No printing function for this routing protocol\n");
|
|
goto out;
|
|
}
|
|
|
|
if (hard_iface->if_status != BATADV_IF_ACTIVE) {
|
|
seq_puts(seq, "Interface not active\n");
|
|
goto out;
|
|
}
|
|
|
|
seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n",
|
|
BATADV_SOURCE_VERSION, hard_iface->net_dev->name,
|
|
hard_iface->net_dev->dev_addr,
|
|
hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name);
|
|
|
|
bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface);
|
|
|
|
out:
|
|
if (hard_iface)
|
|
batadv_hardif_put(hard_iface);
|
|
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_algo_ops *bao = bat_priv->bat_algo_ops;
|
|
struct batadv_hashtable *hash = bat_priv->orig_hash;
|
|
struct hlist_head *head;
|
|
struct batadv_orig_node *orig_node;
|
|
u32 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, head, hash_entry) {
|
|
ret = 0;
|
|
if (bao->bat_orig_add_if)
|
|
ret = bao->bat_orig_add_if(orig_node,
|
|
max_if_num);
|
|
if (ret == -ENOMEM)
|
|
goto err;
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
rcu_read_unlock();
|
|
return -ENOMEM;
|
|
}
|
|
|
|
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_head *head;
|
|
struct batadv_hard_iface *hard_iface_tmp;
|
|
struct batadv_orig_node *orig_node;
|
|
struct batadv_algo_ops *bao = bat_priv->bat_algo_ops;
|
|
u32 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, head, hash_entry) {
|
|
ret = 0;
|
|
if (bao->bat_orig_del_if)
|
|
ret = bao->bat_orig_del_if(orig_node,
|
|
max_if_num,
|
|
hard_iface->if_num);
|
|
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;
|
|
}
|