1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2007-2018 B.A.T.M.A.N. contributors:
4 * Marek Lindner, Simon Wunderlich, Antonio Quartulli
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 #include "translation-table.h"
22 #include <linux/atomic.h>
23 #include <linux/bitops.h>
24 #include <linux/build_bug.h>
25 #include <linux/byteorder/generic.h>
26 #include <linux/cache.h>
27 #include <linux/compiler.h>
28 #include <linux/crc32c.h>
29 #include <linux/errno.h>
30 #include <linux/etherdevice.h>
31 #include <linux/gfp.h>
32 #include <linux/if_ether.h>
33 #include <linux/init.h>
34 #include <linux/jhash.h>
35 #include <linux/jiffies.h>
36 #include <linux/kernel.h>
37 #include <linux/kref.h>
38 #include <linux/list.h>
39 #include <linux/lockdep.h>
40 #include <linux/net.h>
41 #include <linux/netdevice.h>
42 #include <linux/netlink.h>
43 #include <linux/rculist.h>
44 #include <linux/rcupdate.h>
45 #include <linux/seq_file.h>
46 #include <linux/skbuff.h>
47 #include <linux/slab.h>
48 #include <linux/spinlock.h>
49 #include <linux/stddef.h>
50 #include <linux/string.h>
51 #include <linux/workqueue.h>
52 #include <net/genetlink.h>
53 #include <net/netlink.h>
55 #include <uapi/linux/batadv_packet.h>
56 #include <uapi/linux/batman_adv.h>
58 #include "bridge_loop_avoidance.h"
59 #include "hard-interface.h"
63 #include "originator.h"
64 #include "soft-interface.h"
67 static struct kmem_cache *batadv_tl_cache __read_mostly;
68 static struct kmem_cache *batadv_tg_cache __read_mostly;
69 static struct kmem_cache *batadv_tt_orig_cache __read_mostly;
70 static struct kmem_cache *batadv_tt_change_cache __read_mostly;
71 static struct kmem_cache *batadv_tt_req_cache __read_mostly;
72 static struct kmem_cache *batadv_tt_roam_cache __read_mostly;
75 static struct lock_class_key batadv_tt_local_hash_lock_class_key;
76 static struct lock_class_key batadv_tt_global_hash_lock_class_key;
78 static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client,
80 struct batadv_orig_node *orig_node);
81 static void batadv_tt_purge(struct work_struct *work);
83 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry);
84 static void batadv_tt_global_del(struct batadv_priv *bat_priv,
85 struct batadv_orig_node *orig_node,
86 const unsigned char *addr,
87 unsigned short vid, const char *message,
91 * batadv_compare_tt() - check if two TT entries are the same
92 * @node: the list element pointer of the first TT entry
93 * @data2: pointer to the tt_common_entry of the second TT entry
95 * Compare the MAC address and the VLAN ID of the two TT entries and check if
96 * they are the same TT client.
97 * Return: true if the two TT clients are the same, false otherwise
99 static bool batadv_compare_tt(const struct hlist_node *node, const void *data2)
101 const void *data1 = container_of(node, struct batadv_tt_common_entry,
103 const struct batadv_tt_common_entry *tt1 = data1;
104 const struct batadv_tt_common_entry *tt2 = data2;
106 return (tt1->vid == tt2->vid) && batadv_compare_eth(data1, data2);
110 * batadv_choose_tt() - return the index of the tt entry in the hash table
111 * @data: pointer to the tt_common_entry object to map
112 * @size: the size of the hash table
114 * Return: the hash index where the object represented by 'data' should be
117 static inline u32 batadv_choose_tt(const void *data, u32 size)
119 struct batadv_tt_common_entry *tt;
122 tt = (struct batadv_tt_common_entry *)data;
123 hash = jhash(&tt->addr, ETH_ALEN, hash);
124 hash = jhash(&tt->vid, sizeof(tt->vid), hash);
130 * batadv_tt_hash_find() - look for a client in the given hash table
131 * @hash: the hash table to search
132 * @addr: the mac address of the client to look for
133 * @vid: VLAN identifier
135 * Return: a pointer to the tt_common struct belonging to the searched client if
136 * found, NULL otherwise.
138 static struct batadv_tt_common_entry *
139 batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr,
142 struct hlist_head *head;
143 struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL;
149 ether_addr_copy(to_search.addr, addr);
152 index = batadv_choose_tt(&to_search, hash->size);
153 head = &hash->table[index];
156 hlist_for_each_entry_rcu(tt, head, hash_entry) {
157 if (!batadv_compare_eth(tt, addr))
163 if (!kref_get_unless_zero(&tt->refcount))
175 * batadv_tt_local_hash_find() - search the local table for a given client
176 * @bat_priv: the bat priv with all the soft interface information
177 * @addr: the mac address of the client to look for
178 * @vid: VLAN identifier
180 * Return: a pointer to the corresponding tt_local_entry struct if the client is
181 * found, NULL otherwise.
183 static struct batadv_tt_local_entry *
184 batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr,
187 struct batadv_tt_common_entry *tt_common_entry;
188 struct batadv_tt_local_entry *tt_local_entry = NULL;
190 tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr,
193 tt_local_entry = container_of(tt_common_entry,
194 struct batadv_tt_local_entry,
196 return tt_local_entry;
200 * batadv_tt_global_hash_find() - search the global table for a given client
201 * @bat_priv: the bat priv with all the soft interface information
202 * @addr: the mac address of the client to look for
203 * @vid: VLAN identifier
205 * Return: a pointer to the corresponding tt_global_entry struct if the client
206 * is found, NULL otherwise.
208 static struct batadv_tt_global_entry *
209 batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr,
212 struct batadv_tt_common_entry *tt_common_entry;
213 struct batadv_tt_global_entry *tt_global_entry = NULL;
215 tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr,
218 tt_global_entry = container_of(tt_common_entry,
219 struct batadv_tt_global_entry,
221 return tt_global_entry;
225 * batadv_tt_local_entry_free_rcu() - free the tt_local_entry
226 * @rcu: rcu pointer of the tt_local_entry
228 static void batadv_tt_local_entry_free_rcu(struct rcu_head *rcu)
230 struct batadv_tt_local_entry *tt_local_entry;
232 tt_local_entry = container_of(rcu, struct batadv_tt_local_entry,
235 kmem_cache_free(batadv_tl_cache, tt_local_entry);
239 * batadv_tt_local_entry_release() - release tt_local_entry from lists and queue
240 * for free after rcu grace period
241 * @ref: kref pointer of the nc_node
243 static void batadv_tt_local_entry_release(struct kref *ref)
245 struct batadv_tt_local_entry *tt_local_entry;
247 tt_local_entry = container_of(ref, struct batadv_tt_local_entry,
250 batadv_softif_vlan_put(tt_local_entry->vlan);
252 call_rcu(&tt_local_entry->common.rcu, batadv_tt_local_entry_free_rcu);
256 * batadv_tt_local_entry_put() - decrement the tt_local_entry refcounter and
257 * possibly release it
258 * @tt_local_entry: tt_local_entry to be free'd
261 batadv_tt_local_entry_put(struct batadv_tt_local_entry *tt_local_entry)
263 kref_put(&tt_local_entry->common.refcount,
264 batadv_tt_local_entry_release);
268 * batadv_tt_global_entry_free_rcu() - free the tt_global_entry
269 * @rcu: rcu pointer of the tt_global_entry
271 static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu)
273 struct batadv_tt_global_entry *tt_global_entry;
275 tt_global_entry = container_of(rcu, struct batadv_tt_global_entry,
278 kmem_cache_free(batadv_tg_cache, tt_global_entry);
282 * batadv_tt_global_entry_release() - release tt_global_entry from lists and
283 * queue for free after rcu grace period
284 * @ref: kref pointer of the nc_node
286 static void batadv_tt_global_entry_release(struct kref *ref)
288 struct batadv_tt_global_entry *tt_global_entry;
290 tt_global_entry = container_of(ref, struct batadv_tt_global_entry,
293 batadv_tt_global_del_orig_list(tt_global_entry);
295 call_rcu(&tt_global_entry->common.rcu, batadv_tt_global_entry_free_rcu);
299 * batadv_tt_global_entry_put() - decrement the tt_global_entry refcounter and
300 * possibly release it
301 * @tt_global_entry: tt_global_entry to be free'd
304 batadv_tt_global_entry_put(struct batadv_tt_global_entry *tt_global_entry)
306 kref_put(&tt_global_entry->common.refcount,
307 batadv_tt_global_entry_release);
311 * batadv_tt_global_hash_count() - count the number of orig entries
312 * @bat_priv: the bat priv with all the soft interface information
313 * @addr: the mac address of the client to count entries for
314 * @vid: VLAN identifier
316 * Return: the number of originators advertising the given address/data
317 * (excluding ourself).
319 int batadv_tt_global_hash_count(struct batadv_priv *bat_priv,
320 const u8 *addr, unsigned short vid)
322 struct batadv_tt_global_entry *tt_global_entry;
325 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
326 if (!tt_global_entry)
329 count = atomic_read(&tt_global_entry->orig_list_count);
330 batadv_tt_global_entry_put(tt_global_entry);
336 * batadv_tt_local_size_mod() - change the size by v of the local table
338 * @bat_priv: the bat priv with all the soft interface information
339 * @vid: the VLAN identifier of the sub-table to change
340 * @v: the amount to sum to the local table size
342 static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv,
343 unsigned short vid, int v)
345 struct batadv_softif_vlan *vlan;
347 vlan = batadv_softif_vlan_get(bat_priv, vid);
351 atomic_add(v, &vlan->tt.num_entries);
353 batadv_softif_vlan_put(vlan);
357 * batadv_tt_local_size_inc() - increase by one the local table size for the
359 * @bat_priv: the bat priv with all the soft interface information
360 * @vid: the VLAN identifier
362 static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv,
365 batadv_tt_local_size_mod(bat_priv, vid, 1);
369 * batadv_tt_local_size_dec() - decrease by one the local table size for the
371 * @bat_priv: the bat priv with all the soft interface information
372 * @vid: the VLAN identifier
374 static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv,
377 batadv_tt_local_size_mod(bat_priv, vid, -1);
381 * batadv_tt_global_size_mod() - change the size by v of the global table
382 * for orig_node identified by vid
383 * @orig_node: the originator for which the table has to be modified
384 * @vid: the VLAN identifier
385 * @v: the amount to sum to the global table size
387 static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node,
388 unsigned short vid, int v)
390 struct batadv_orig_node_vlan *vlan;
392 vlan = batadv_orig_node_vlan_new(orig_node, vid);
396 if (atomic_add_return(v, &vlan->tt.num_entries) == 0) {
397 spin_lock_bh(&orig_node->vlan_list_lock);
398 if (!hlist_unhashed(&vlan->list)) {
399 hlist_del_init_rcu(&vlan->list);
400 batadv_orig_node_vlan_put(vlan);
402 spin_unlock_bh(&orig_node->vlan_list_lock);
405 batadv_orig_node_vlan_put(vlan);
409 * batadv_tt_global_size_inc() - increase by one the global table size for the
411 * @orig_node: the originator which global table size has to be decreased
412 * @vid: the vlan identifier
414 static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node,
417 batadv_tt_global_size_mod(orig_node, vid, 1);
421 * batadv_tt_global_size_dec() - decrease by one the global table size for the
423 * @orig_node: the originator which global table size has to be decreased
424 * @vid: the vlan identifier
426 static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node,
429 batadv_tt_global_size_mod(orig_node, vid, -1);
433 * batadv_tt_orig_list_entry_free_rcu() - free the orig_entry
434 * @rcu: rcu pointer of the orig_entry
436 static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu)
438 struct batadv_tt_orig_list_entry *orig_entry;
440 orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu);
442 kmem_cache_free(batadv_tt_orig_cache, orig_entry);
446 * batadv_tt_orig_list_entry_release() - release tt orig entry from lists and
447 * queue for free after rcu grace period
448 * @ref: kref pointer of the tt orig entry
450 static void batadv_tt_orig_list_entry_release(struct kref *ref)
452 struct batadv_tt_orig_list_entry *orig_entry;
454 orig_entry = container_of(ref, struct batadv_tt_orig_list_entry,
457 batadv_orig_node_put(orig_entry->orig_node);
458 call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu);
462 * batadv_tt_orig_list_entry_put() - decrement the tt orig entry refcounter and
463 * possibly release it
464 * @orig_entry: tt orig entry to be free'd
467 batadv_tt_orig_list_entry_put(struct batadv_tt_orig_list_entry *orig_entry)
469 kref_put(&orig_entry->refcount, batadv_tt_orig_list_entry_release);
473 * batadv_tt_local_event() - store a local TT event (ADD/DEL)
474 * @bat_priv: the bat priv with all the soft interface information
475 * @tt_local_entry: the TT entry involved in the event
476 * @event_flags: flags to store in the event structure
478 static void batadv_tt_local_event(struct batadv_priv *bat_priv,
479 struct batadv_tt_local_entry *tt_local_entry,
482 struct batadv_tt_change_node *tt_change_node, *entry, *safe;
483 struct batadv_tt_common_entry *common = &tt_local_entry->common;
484 u8 flags = common->flags | event_flags;
485 bool event_removed = false;
486 bool del_op_requested, del_op_entry;
488 tt_change_node = kmem_cache_alloc(batadv_tt_change_cache, GFP_ATOMIC);
492 tt_change_node->change.flags = flags;
493 memset(tt_change_node->change.reserved, 0,
494 sizeof(tt_change_node->change.reserved));
495 ether_addr_copy(tt_change_node->change.addr, common->addr);
496 tt_change_node->change.vid = htons(common->vid);
498 del_op_requested = flags & BATADV_TT_CLIENT_DEL;
500 /* check for ADD+DEL or DEL+ADD events */
501 spin_lock_bh(&bat_priv->tt.changes_list_lock);
502 list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
504 if (!batadv_compare_eth(entry->change.addr, common->addr))
507 /* DEL+ADD in the same orig interval have no effect and can be
508 * removed to avoid silly behaviour on the receiver side. The
509 * other way around (ADD+DEL) can happen in case of roaming of
510 * a client still in the NEW state. Roaming of NEW clients is
511 * now possible due to automatically recognition of "temporary"
514 del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL;
515 if (!del_op_requested && del_op_entry)
517 if (del_op_requested && !del_op_entry)
520 /* this is a second add in the same originator interval. It
521 * means that flags have been changed: update them!
523 if (!del_op_requested && !del_op_entry)
524 entry->change.flags = flags;
528 list_del(&entry->list);
529 kmem_cache_free(batadv_tt_change_cache, entry);
530 kmem_cache_free(batadv_tt_change_cache, tt_change_node);
531 event_removed = true;
535 /* track the change in the OGMinterval list */
536 list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list);
539 spin_unlock_bh(&bat_priv->tt.changes_list_lock);
542 atomic_dec(&bat_priv->tt.local_changes);
544 atomic_inc(&bat_priv->tt.local_changes);
548 * batadv_tt_len() - compute length in bytes of given number of tt changes
549 * @changes_num: number of tt changes
551 * Return: computed length in bytes.
553 static int batadv_tt_len(int changes_num)
555 return changes_num * sizeof(struct batadv_tvlv_tt_change);
559 * batadv_tt_entries() - compute the number of entries fitting in tt_len bytes
560 * @tt_len: available space
562 * Return: the number of entries.
564 static u16 batadv_tt_entries(u16 tt_len)
566 return tt_len / batadv_tt_len(1);
570 * batadv_tt_local_table_transmit_size() - calculates the local translation
571 * table size when transmitted over the air
572 * @bat_priv: the bat priv with all the soft interface information
574 * Return: local translation table size in bytes.
576 static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv)
579 u16 tt_local_entries = 0;
580 struct batadv_softif_vlan *vlan;
584 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
586 tt_local_entries += atomic_read(&vlan->tt.num_entries);
590 /* header size of tvlv encapsulated tt response payload */
591 hdr_size = sizeof(struct batadv_unicast_tvlv_packet);
592 hdr_size += sizeof(struct batadv_tvlv_hdr);
593 hdr_size += sizeof(struct batadv_tvlv_tt_data);
594 hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data);
596 return hdr_size + batadv_tt_len(tt_local_entries);
599 static int batadv_tt_local_init(struct batadv_priv *bat_priv)
601 if (bat_priv->tt.local_hash)
604 bat_priv->tt.local_hash = batadv_hash_new(1024);
606 if (!bat_priv->tt.local_hash)
609 batadv_hash_set_lock_class(bat_priv->tt.local_hash,
610 &batadv_tt_local_hash_lock_class_key);
615 static void batadv_tt_global_free(struct batadv_priv *bat_priv,
616 struct batadv_tt_global_entry *tt_global,
619 batadv_dbg(BATADV_DBG_TT, bat_priv,
620 "Deleting global tt entry %pM (vid: %d): %s\n",
621 tt_global->common.addr,
622 batadv_print_vid(tt_global->common.vid), message);
624 batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt,
625 batadv_choose_tt, &tt_global->common);
626 batadv_tt_global_entry_put(tt_global);
630 * batadv_tt_local_add() - add a new client to the local table or update an
632 * @soft_iface: netdev struct of the mesh interface
633 * @addr: the mac address of the client to add
634 * @vid: VLAN identifier
635 * @ifindex: index of the interface where the client is connected to (useful to
636 * identify wireless clients)
637 * @mark: the value contained in the skb->mark field of the received packet (if
640 * Return: true if the client was successfully added, false otherwise.
642 bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr,
643 unsigned short vid, int ifindex, u32 mark)
645 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
646 struct batadv_tt_local_entry *tt_local;
647 struct batadv_tt_global_entry *tt_global = NULL;
648 struct net *net = dev_net(soft_iface);
649 struct batadv_softif_vlan *vlan;
650 struct net_device *in_dev = NULL;
651 struct batadv_hard_iface *in_hardif = NULL;
652 struct hlist_head *head;
653 struct batadv_tt_orig_list_entry *orig_entry;
654 int hash_added, table_size, packet_size_max;
656 bool roamed_back = false;
660 if (ifindex != BATADV_NULL_IFINDEX)
661 in_dev = dev_get_by_index(net, ifindex);
664 in_hardif = batadv_hardif_get_by_netdev(in_dev);
666 tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid);
668 if (!is_multicast_ether_addr(addr))
669 tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid);
672 tt_local->last_seen = jiffies;
673 if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) {
674 batadv_dbg(BATADV_DBG_TT, bat_priv,
675 "Re-adding pending client %pM (vid: %d)\n",
676 addr, batadv_print_vid(vid));
677 /* whatever the reason why the PENDING flag was set,
678 * this is a client which was enqueued to be removed in
679 * this orig_interval. Since it popped up again, the
680 * flag can be reset like it was never enqueued
682 tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING;
686 if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) {
687 batadv_dbg(BATADV_DBG_TT, bat_priv,
688 "Roaming client %pM (vid: %d) came back to its original location\n",
689 addr, batadv_print_vid(vid));
690 /* the ROAM flag is set because this client roamed away
691 * and the node got a roaming_advertisement message. Now
692 * that the client popped up again at its original
693 * location such flag can be unset
695 tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM;
701 /* Ignore the client if we cannot send it in a full table response. */
702 table_size = batadv_tt_local_table_transmit_size(bat_priv);
703 table_size += batadv_tt_len(1);
704 packet_size_max = atomic_read(&bat_priv->packet_size_max);
705 if (table_size > packet_size_max) {
706 net_ratelimited_function(batadv_info, soft_iface,
707 "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n",
708 table_size, packet_size_max, addr);
712 tt_local = kmem_cache_alloc(batadv_tl_cache, GFP_ATOMIC);
716 /* increase the refcounter of the related vlan */
717 vlan = batadv_softif_vlan_get(bat_priv, vid);
719 net_ratelimited_function(batadv_info, soft_iface,
720 "adding TT local entry %pM to non-existent VLAN %d\n",
721 addr, batadv_print_vid(vid));
722 kmem_cache_free(batadv_tl_cache, tt_local);
727 batadv_dbg(BATADV_DBG_TT, bat_priv,
728 "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n",
729 addr, batadv_print_vid(vid),
730 (u8)atomic_read(&bat_priv->tt.vn));
732 ether_addr_copy(tt_local->common.addr, addr);
733 /* The local entry has to be marked as NEW to avoid to send it in
734 * a full table response going out before the next ttvn increment
735 * (consistency check)
737 tt_local->common.flags = BATADV_TT_CLIENT_NEW;
738 tt_local->common.vid = vid;
739 if (batadv_is_wifi_hardif(in_hardif))
740 tt_local->common.flags |= BATADV_TT_CLIENT_WIFI;
741 kref_init(&tt_local->common.refcount);
742 tt_local->last_seen = jiffies;
743 tt_local->common.added_at = tt_local->last_seen;
744 tt_local->vlan = vlan;
746 /* the batman interface mac and multicast addresses should never be
749 if (batadv_compare_eth(addr, soft_iface->dev_addr) ||
750 is_multicast_ether_addr(addr))
751 tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE;
753 kref_get(&tt_local->common.refcount);
754 hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt,
755 batadv_choose_tt, &tt_local->common,
756 &tt_local->common.hash_entry);
758 if (unlikely(hash_added != 0)) {
759 /* remove the reference for the hash */
760 batadv_tt_local_entry_put(tt_local);
765 batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS);
768 /* Check whether it is a roaming, but don't do anything if the roaming
769 * process has already been handled
771 if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) {
772 /* These node are probably going to update their tt table */
773 head = &tt_global->orig_list;
775 hlist_for_each_entry_rcu(orig_entry, head, list) {
776 batadv_send_roam_adv(bat_priv, tt_global->common.addr,
777 tt_global->common.vid,
778 orig_entry->orig_node);
782 batadv_tt_global_free(bat_priv, tt_global,
786 /* The global entry has to be marked as ROAMING and
787 * has to be kept for consistency purpose
789 tt_global->common.flags |= BATADV_TT_CLIENT_ROAM;
790 tt_global->roam_at = jiffies;
794 /* store the current remote flags before altering them. This helps
795 * understanding is flags are changing or not
797 remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK;
799 if (batadv_is_wifi_hardif(in_hardif))
800 tt_local->common.flags |= BATADV_TT_CLIENT_WIFI;
802 tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI;
804 /* check the mark in the skb: if it's equal to the configured
805 * isolation_mark, it means the packet is coming from an isolated
808 match_mark = (mark & bat_priv->isolation_mark_mask);
809 if (bat_priv->isolation_mark_mask &&
810 match_mark == bat_priv->isolation_mark)
811 tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA;
813 tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA;
815 /* if any "dynamic" flag has been modified, resend an ADD event for this
816 * entry so that all the nodes can get the new flags
818 if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK))
819 batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS);
824 batadv_hardif_put(in_hardif);
828 batadv_tt_local_entry_put(tt_local);
830 batadv_tt_global_entry_put(tt_global);
835 * batadv_tt_prepare_tvlv_global_data() - prepare the TVLV TT header to send
836 * within a TT Response directed to another node
837 * @orig_node: originator for which the TT data has to be prepared
838 * @tt_data: uninitialised pointer to the address of the TVLV buffer
839 * @tt_change: uninitialised pointer to the address of the area where the TT
840 * changed can be stored
841 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
842 * function reserves the amount of space needed to send the entire global TT
843 * table. In case of success the value is updated with the real amount of
845 * Allocate the needed amount of memory for the entire TT TVLV and write its
846 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
847 * objects, one per active VLAN served by the originator node.
849 * Return: the size of the allocated buffer or 0 in case of failure.
852 batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node,
853 struct batadv_tvlv_tt_data **tt_data,
854 struct batadv_tvlv_tt_change **tt_change,
861 struct batadv_tvlv_tt_vlan_data *tt_vlan;
862 struct batadv_orig_node_vlan *vlan;
865 spin_lock_bh(&orig_node->vlan_list_lock);
866 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
868 num_entries += atomic_read(&vlan->tt.num_entries);
871 change_offset = sizeof(**tt_data);
872 change_offset += num_vlan * sizeof(*tt_vlan);
874 /* if tt_len is negative, allocate the space needed by the full table */
876 *tt_len = batadv_tt_len(num_entries);
879 tvlv_len += change_offset;
881 *tt_data = kmalloc(tvlv_len, GFP_ATOMIC);
887 (*tt_data)->flags = BATADV_NO_FLAGS;
888 (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn);
889 (*tt_data)->num_vlan = htons(num_vlan);
891 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1);
892 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
893 tt_vlan->vid = htons(vlan->vid);
894 tt_vlan->crc = htonl(vlan->tt.crc);
899 tt_change_ptr = (u8 *)*tt_data + change_offset;
900 *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
903 spin_unlock_bh(&orig_node->vlan_list_lock);
908 * batadv_tt_prepare_tvlv_local_data() - allocate and prepare the TT TVLV for
910 * @bat_priv: the bat priv with all the soft interface information
911 * @tt_data: uninitialised pointer to the address of the TVLV buffer
912 * @tt_change: uninitialised pointer to the address of the area where the TT
913 * changes can be stored
914 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
915 * function reserves the amount of space needed to send the entire local TT
916 * table. In case of success the value is updated with the real amount of
919 * Allocate the needed amount of memory for the entire TT TVLV and write its
920 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
921 * objects, one per active VLAN.
923 * Return: the size of the allocated buffer or 0 in case of failure.
926 batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,
927 struct batadv_tvlv_tt_data **tt_data,
928 struct batadv_tvlv_tt_change **tt_change,
931 struct batadv_tvlv_tt_vlan_data *tt_vlan;
932 struct batadv_softif_vlan *vlan;
934 u16 vlan_entries = 0;
935 u16 total_entries = 0;
940 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
941 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
942 vlan_entries = atomic_read(&vlan->tt.num_entries);
943 if (vlan_entries < 1)
947 total_entries += vlan_entries;
950 change_offset = sizeof(**tt_data);
951 change_offset += num_vlan * sizeof(*tt_vlan);
953 /* if tt_len is negative, allocate the space needed by the full table */
955 *tt_len = batadv_tt_len(total_entries);
958 tvlv_len += change_offset;
960 *tt_data = kmalloc(tvlv_len, GFP_ATOMIC);
966 (*tt_data)->flags = BATADV_NO_FLAGS;
967 (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn);
968 (*tt_data)->num_vlan = htons(num_vlan);
970 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1);
971 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
972 vlan_entries = atomic_read(&vlan->tt.num_entries);
973 if (vlan_entries < 1)
976 tt_vlan->vid = htons(vlan->vid);
977 tt_vlan->crc = htonl(vlan->tt.crc);
982 tt_change_ptr = (u8 *)*tt_data + change_offset;
983 *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
986 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
991 * batadv_tt_tvlv_container_update() - update the translation table tvlv
992 * container after local tt changes have been committed
993 * @bat_priv: the bat priv with all the soft interface information
995 static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv)
997 struct batadv_tt_change_node *entry, *safe;
998 struct batadv_tvlv_tt_data *tt_data;
999 struct batadv_tvlv_tt_change *tt_change;
1000 int tt_diff_len, tt_change_len = 0;
1001 int tt_diff_entries_num = 0;
1002 int tt_diff_entries_count = 0;
1005 tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes);
1006 tt_diff_len = batadv_tt_len(tt_diff_entries_num);
1008 /* if we have too many changes for one packet don't send any
1009 * and wait for the tt table request which will be fragmented
1011 if (tt_diff_len > bat_priv->soft_iface->mtu)
1014 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data,
1015 &tt_change, &tt_diff_len);
1019 tt_data->flags = BATADV_TT_OGM_DIFF;
1021 if (tt_diff_len == 0)
1022 goto container_register;
1024 spin_lock_bh(&bat_priv->tt.changes_list_lock);
1025 atomic_set(&bat_priv->tt.local_changes, 0);
1027 list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
1029 if (tt_diff_entries_count < tt_diff_entries_num) {
1030 memcpy(tt_change + tt_diff_entries_count,
1032 sizeof(struct batadv_tvlv_tt_change));
1033 tt_diff_entries_count++;
1035 list_del(&entry->list);
1036 kmem_cache_free(batadv_tt_change_cache, entry);
1038 spin_unlock_bh(&bat_priv->tt.changes_list_lock);
1040 /* Keep the buffer for possible tt_request */
1041 spin_lock_bh(&bat_priv->tt.last_changeset_lock);
1042 kfree(bat_priv->tt.last_changeset);
1043 bat_priv->tt.last_changeset_len = 0;
1044 bat_priv->tt.last_changeset = NULL;
1045 tt_change_len = batadv_tt_len(tt_diff_entries_count);
1046 /* check whether this new OGM has no changes due to size problems */
1047 if (tt_diff_entries_count > 0) {
1048 /* if kmalloc() fails we will reply with the full table
1049 * instead of providing the diff
1051 bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC);
1052 if (bat_priv->tt.last_changeset) {
1053 memcpy(bat_priv->tt.last_changeset,
1054 tt_change, tt_change_len);
1055 bat_priv->tt.last_changeset_len = tt_diff_len;
1058 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
1061 batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data,
1066 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1069 * batadv_tt_local_seq_print_text() - Print the local tt table in a seq file
1070 * @seq: seq file to print on
1075 int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset)
1077 struct net_device *net_dev = (struct net_device *)seq->private;
1078 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1079 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
1080 struct batadv_tt_common_entry *tt_common_entry;
1081 struct batadv_tt_local_entry *tt_local;
1082 struct batadv_hard_iface *primary_if;
1083 struct hlist_head *head;
1086 int last_seen_msecs;
1087 unsigned long last_seen_jiffies;
1089 u16 np_flag = BATADV_TT_CLIENT_NOPURGE;
1091 primary_if = batadv_seq_print_text_primary_if_get(seq);
1096 "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n",
1097 net_dev->name, (u8)atomic_read(&bat_priv->tt.vn));
1099 " Client VID Flags Last seen (CRC )\n");
1101 for (i = 0; i < hash->size; i++) {
1102 head = &hash->table[i];
1105 hlist_for_each_entry_rcu(tt_common_entry,
1107 tt_local = container_of(tt_common_entry,
1108 struct batadv_tt_local_entry,
1110 last_seen_jiffies = jiffies - tt_local->last_seen;
1111 last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
1112 last_seen_secs = last_seen_msecs / 1000;
1113 last_seen_msecs = last_seen_msecs % 1000;
1115 no_purge = tt_common_entry->flags & np_flag;
1117 " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n",
1118 tt_common_entry->addr,
1119 batadv_print_vid(tt_common_entry->vid),
1120 ((tt_common_entry->flags &
1121 BATADV_TT_CLIENT_ROAM) ? 'R' : '.'),
1122 no_purge ? 'P' : '.',
1123 ((tt_common_entry->flags &
1124 BATADV_TT_CLIENT_NEW) ? 'N' : '.'),
1125 ((tt_common_entry->flags &
1126 BATADV_TT_CLIENT_PENDING) ? 'X' : '.'),
1127 ((tt_common_entry->flags &
1128 BATADV_TT_CLIENT_WIFI) ? 'W' : '.'),
1129 ((tt_common_entry->flags &
1130 BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'),
1131 no_purge ? 0 : last_seen_secs,
1132 no_purge ? 0 : last_seen_msecs,
1133 tt_local->vlan->tt.crc);
1139 batadv_hardif_put(primary_if);
1145 * batadv_tt_local_dump_entry() - Dump one TT local entry into a message
1146 * @msg :Netlink message to dump into
1147 * @portid: Port making netlink request
1148 * @seq: Sequence number of netlink message
1149 * @bat_priv: The bat priv with all the soft interface information
1150 * @common: tt local & tt global common data
1152 * Return: Error code, or 0 on success
1155 batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
1156 struct batadv_priv *bat_priv,
1157 struct batadv_tt_common_entry *common)
1160 struct batadv_softif_vlan *vlan;
1161 struct batadv_tt_local_entry *local;
1162 unsigned int last_seen_msecs;
1165 local = container_of(common, struct batadv_tt_local_entry, common);
1166 last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen);
1168 vlan = batadv_softif_vlan_get(bat_priv, common->vid);
1174 batadv_softif_vlan_put(vlan);
1176 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
1178 BATADV_CMD_GET_TRANSTABLE_LOCAL);
1182 if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) ||
1183 nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) ||
1184 nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) ||
1185 nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags))
1186 goto nla_put_failure;
1188 if (!(common->flags & BATADV_TT_CLIENT_NOPURGE) &&
1189 nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, last_seen_msecs))
1190 goto nla_put_failure;
1192 genlmsg_end(msg, hdr);
1196 genlmsg_cancel(msg, hdr);
1201 * batadv_tt_local_dump_bucket() - Dump one TT local bucket into a message
1202 * @msg: Netlink message to dump into
1203 * @portid: Port making netlink request
1204 * @seq: Sequence number of netlink message
1205 * @bat_priv: The bat priv with all the soft interface information
1206 * @head: Pointer to the list containing the local tt entries
1207 * @idx_s: Number of entries to skip
1209 * Return: Error code, or 0 on success
1212 batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq,
1213 struct batadv_priv *bat_priv,
1214 struct hlist_head *head, int *idx_s)
1216 struct batadv_tt_common_entry *common;
1220 hlist_for_each_entry_rcu(common, head, hash_entry) {
1224 if (batadv_tt_local_dump_entry(msg, portid, seq, bat_priv,
1238 * batadv_tt_local_dump() - Dump TT local entries into a message
1239 * @msg: Netlink message to dump into
1240 * @cb: Parameters from query
1242 * Return: Error code, or 0 on success
1244 int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb)
1246 struct net *net = sock_net(cb->skb->sk);
1247 struct net_device *soft_iface;
1248 struct batadv_priv *bat_priv;
1249 struct batadv_hard_iface *primary_if = NULL;
1250 struct batadv_hashtable *hash;
1251 struct hlist_head *head;
1254 int bucket = cb->args[0];
1255 int idx = cb->args[1];
1256 int portid = NETLINK_CB(cb->skb).portid;
1258 ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
1262 soft_iface = dev_get_by_index(net, ifindex);
1263 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
1268 bat_priv = netdev_priv(soft_iface);
1270 primary_if = batadv_primary_if_get_selected(bat_priv);
1271 if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
1276 hash = bat_priv->tt.local_hash;
1278 while (bucket < hash->size) {
1279 head = &hash->table[bucket];
1281 if (batadv_tt_local_dump_bucket(msg, portid, cb->nlh->nlmsg_seq,
1282 bat_priv, head, &idx))
1292 batadv_hardif_put(primary_if);
1294 dev_put(soft_iface);
1296 cb->args[0] = bucket;
1303 batadv_tt_local_set_pending(struct batadv_priv *bat_priv,
1304 struct batadv_tt_local_entry *tt_local_entry,
1305 u16 flags, const char *message)
1307 batadv_tt_local_event(bat_priv, tt_local_entry, flags);
1309 /* The local client has to be marked as "pending to be removed" but has
1310 * to be kept in the table in order to send it in a full table
1311 * response issued before the net ttvn increment (consistency check)
1313 tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING;
1315 batadv_dbg(BATADV_DBG_TT, bat_priv,
1316 "Local tt entry (%pM, vid: %d) pending to be removed: %s\n",
1317 tt_local_entry->common.addr,
1318 batadv_print_vid(tt_local_entry->common.vid), message);
1322 * batadv_tt_local_remove() - logically remove an entry from the local table
1323 * @bat_priv: the bat priv with all the soft interface information
1324 * @addr: the MAC address of the client to remove
1325 * @vid: VLAN identifier
1326 * @message: message to append to the log on deletion
1327 * @roaming: true if the deletion is due to a roaming event
1329 * Return: the flags assigned to the local entry before being deleted
1331 u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr,
1332 unsigned short vid, const char *message,
1335 struct batadv_tt_local_entry *tt_local_entry;
1336 u16 flags, curr_flags = BATADV_NO_FLAGS;
1337 void *tt_entry_exists;
1339 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
1340 if (!tt_local_entry)
1343 curr_flags = tt_local_entry->common.flags;
1345 flags = BATADV_TT_CLIENT_DEL;
1346 /* if this global entry addition is due to a roaming, the node has to
1347 * mark the local entry as "roamed" in order to correctly reroute
1351 flags |= BATADV_TT_CLIENT_ROAM;
1352 /* mark the local client as ROAMed */
1353 tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM;
1356 if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) {
1357 batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags,
1361 /* if this client has been added right now, it is possible to
1362 * immediately purge it
1364 batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL);
1366 tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash,
1369 &tt_local_entry->common);
1370 if (!tt_entry_exists)
1373 /* extra call to free the local tt entry */
1374 batadv_tt_local_entry_put(tt_local_entry);
1378 batadv_tt_local_entry_put(tt_local_entry);
1384 * batadv_tt_local_purge_list() - purge inactive tt local entries
1385 * @bat_priv: the bat priv with all the soft interface information
1386 * @head: pointer to the list containing the local tt entries
1387 * @timeout: parameter deciding whether a given tt local entry is considered
1390 static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv,
1391 struct hlist_head *head,
1394 struct batadv_tt_local_entry *tt_local_entry;
1395 struct batadv_tt_common_entry *tt_common_entry;
1396 struct hlist_node *node_tmp;
1398 hlist_for_each_entry_safe(tt_common_entry, node_tmp, head,
1400 tt_local_entry = container_of(tt_common_entry,
1401 struct batadv_tt_local_entry,
1403 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE)
1406 /* entry already marked for deletion */
1407 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)
1410 if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout))
1413 batadv_tt_local_set_pending(bat_priv, tt_local_entry,
1414 BATADV_TT_CLIENT_DEL, "timed out");
1419 * batadv_tt_local_purge() - purge inactive tt local entries
1420 * @bat_priv: the bat priv with all the soft interface information
1421 * @timeout: parameter deciding whether a given tt local entry is considered
1424 static void batadv_tt_local_purge(struct batadv_priv *bat_priv,
1427 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
1428 struct hlist_head *head;
1429 spinlock_t *list_lock; /* protects write access to the hash lists */
1432 for (i = 0; i < hash->size; i++) {
1433 head = &hash->table[i];
1434 list_lock = &hash->list_locks[i];
1436 spin_lock_bh(list_lock);
1437 batadv_tt_local_purge_list(bat_priv, head, timeout);
1438 spin_unlock_bh(list_lock);
1442 static void batadv_tt_local_table_free(struct batadv_priv *bat_priv)
1444 struct batadv_hashtable *hash;
1445 spinlock_t *list_lock; /* protects write access to the hash lists */
1446 struct batadv_tt_common_entry *tt_common_entry;
1447 struct batadv_tt_local_entry *tt_local;
1448 struct hlist_node *node_tmp;
1449 struct hlist_head *head;
1452 if (!bat_priv->tt.local_hash)
1455 hash = bat_priv->tt.local_hash;
1457 for (i = 0; i < hash->size; i++) {
1458 head = &hash->table[i];
1459 list_lock = &hash->list_locks[i];
1461 spin_lock_bh(list_lock);
1462 hlist_for_each_entry_safe(tt_common_entry, node_tmp,
1464 hlist_del_rcu(&tt_common_entry->hash_entry);
1465 tt_local = container_of(tt_common_entry,
1466 struct batadv_tt_local_entry,
1469 batadv_tt_local_entry_put(tt_local);
1471 spin_unlock_bh(list_lock);
1474 batadv_hash_destroy(hash);
1476 bat_priv->tt.local_hash = NULL;
1479 static int batadv_tt_global_init(struct batadv_priv *bat_priv)
1481 if (bat_priv->tt.global_hash)
1484 bat_priv->tt.global_hash = batadv_hash_new(1024);
1486 if (!bat_priv->tt.global_hash)
1489 batadv_hash_set_lock_class(bat_priv->tt.global_hash,
1490 &batadv_tt_global_hash_lock_class_key);
1495 static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv)
1497 struct batadv_tt_change_node *entry, *safe;
1499 spin_lock_bh(&bat_priv->tt.changes_list_lock);
1501 list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
1503 list_del(&entry->list);
1504 kmem_cache_free(batadv_tt_change_cache, entry);
1507 atomic_set(&bat_priv->tt.local_changes, 0);
1508 spin_unlock_bh(&bat_priv->tt.changes_list_lock);
1512 * batadv_tt_global_orig_entry_find() - find a TT orig_list_entry
1513 * @entry: the TT global entry where the orig_list_entry has to be
1515 * @orig_node: the originator for which the orig_list_entry has to be found
1517 * retrieve the orig_tt_list_entry belonging to orig_node from the
1518 * batadv_tt_global_entry list
1520 * Return: it with an increased refcounter, NULL if not found
1522 static struct batadv_tt_orig_list_entry *
1523 batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry,
1524 const struct batadv_orig_node *orig_node)
1526 struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL;
1527 const struct hlist_head *head;
1530 head = &entry->orig_list;
1531 hlist_for_each_entry_rcu(tmp_orig_entry, head, list) {
1532 if (tmp_orig_entry->orig_node != orig_node)
1534 if (!kref_get_unless_zero(&tmp_orig_entry->refcount))
1537 orig_entry = tmp_orig_entry;
1546 * batadv_tt_global_entry_has_orig() - check if a TT global entry is also
1547 * handled by a given originator
1548 * @entry: the TT global entry to check
1549 * @orig_node: the originator to search in the list
1550 * @flags: a pointer to store TT flags for the given @entry received
1553 * find out if an orig_node is already in the list of a tt_global_entry.
1555 * Return: true if found, false otherwise
1558 batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry,
1559 const struct batadv_orig_node *orig_node,
1562 struct batadv_tt_orig_list_entry *orig_entry;
1565 orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node);
1570 *flags = orig_entry->flags;
1572 batadv_tt_orig_list_entry_put(orig_entry);
1579 * batadv_tt_global_sync_flags() - update TT sync flags
1580 * @tt_global: the TT global entry to update sync flags in
1582 * Updates the sync flag bits in the tt_global flag attribute with a logical
1583 * OR of all sync flags from any of its TT orig entries.
1586 batadv_tt_global_sync_flags(struct batadv_tt_global_entry *tt_global)
1588 struct batadv_tt_orig_list_entry *orig_entry;
1589 const struct hlist_head *head;
1590 u16 flags = BATADV_NO_FLAGS;
1593 head = &tt_global->orig_list;
1594 hlist_for_each_entry_rcu(orig_entry, head, list)
1595 flags |= orig_entry->flags;
1598 flags |= tt_global->common.flags & (~BATADV_TT_SYNC_MASK);
1599 tt_global->common.flags = flags;
1603 * batadv_tt_global_orig_entry_add() - add or update a TT orig entry
1604 * @tt_global: the TT global entry to add an orig entry in
1605 * @orig_node: the originator to add an orig entry for
1606 * @ttvn: translation table version number of this changeset
1607 * @flags: TT sync flags
1610 batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global,
1611 struct batadv_orig_node *orig_node, int ttvn,
1614 struct batadv_tt_orig_list_entry *orig_entry;
1616 orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node);
1618 /* refresh the ttvn: the current value could be a bogus one that
1619 * was added during a "temporary client detection"
1621 orig_entry->ttvn = ttvn;
1622 orig_entry->flags = flags;
1626 orig_entry = kmem_cache_zalloc(batadv_tt_orig_cache, GFP_ATOMIC);
1630 INIT_HLIST_NODE(&orig_entry->list);
1631 kref_get(&orig_node->refcount);
1632 batadv_tt_global_size_inc(orig_node, tt_global->common.vid);
1633 orig_entry->orig_node = orig_node;
1634 orig_entry->ttvn = ttvn;
1635 orig_entry->flags = flags;
1636 kref_init(&orig_entry->refcount);
1638 spin_lock_bh(&tt_global->list_lock);
1639 kref_get(&orig_entry->refcount);
1640 hlist_add_head_rcu(&orig_entry->list,
1641 &tt_global->orig_list);
1642 spin_unlock_bh(&tt_global->list_lock);
1643 atomic_inc(&tt_global->orig_list_count);
1646 batadv_tt_global_sync_flags(tt_global);
1649 batadv_tt_orig_list_entry_put(orig_entry);
1653 * batadv_tt_global_add() - add a new TT global entry or update an existing one
1654 * @bat_priv: the bat priv with all the soft interface information
1655 * @orig_node: the originator announcing the client
1656 * @tt_addr: the mac address of the non-mesh client
1657 * @vid: VLAN identifier
1658 * @flags: TT flags that have to be set for this non-mesh client
1659 * @ttvn: the tt version number ever announcing this non-mesh client
1661 * Add a new TT global entry for the given originator. If the entry already
1662 * exists add a new reference to the given originator (a global entry can have
1663 * references to multiple originators) and adjust the flags attribute to reflect
1664 * the function argument.
1665 * If a TT local entry exists for this non-mesh client remove it.
1667 * The caller must hold orig_node refcount.
1669 * Return: true if the new entry has been added, false otherwise
1671 static bool batadv_tt_global_add(struct batadv_priv *bat_priv,
1672 struct batadv_orig_node *orig_node,
1673 const unsigned char *tt_addr,
1674 unsigned short vid, u16 flags, u8 ttvn)
1676 struct batadv_tt_global_entry *tt_global_entry;
1677 struct batadv_tt_local_entry *tt_local_entry;
1680 struct batadv_tt_common_entry *common;
1683 /* ignore global entries from backbone nodes */
1684 if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid))
1687 tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid);
1688 tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid);
1690 /* if the node already has a local client for this entry, it has to wait
1691 * for a roaming advertisement instead of manually messing up the global
1694 if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry &&
1695 !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW))
1698 if (!tt_global_entry) {
1699 tt_global_entry = kmem_cache_zalloc(batadv_tg_cache,
1701 if (!tt_global_entry)
1704 common = &tt_global_entry->common;
1705 ether_addr_copy(common->addr, tt_addr);
1708 common->flags = flags;
1709 tt_global_entry->roam_at = 0;
1710 /* node must store current time in case of roaming. This is
1711 * needed to purge this entry out on timeout (if nobody claims
1714 if (flags & BATADV_TT_CLIENT_ROAM)
1715 tt_global_entry->roam_at = jiffies;
1716 kref_init(&common->refcount);
1717 common->added_at = jiffies;
1719 INIT_HLIST_HEAD(&tt_global_entry->orig_list);
1720 atomic_set(&tt_global_entry->orig_list_count, 0);
1721 spin_lock_init(&tt_global_entry->list_lock);
1723 kref_get(&common->refcount);
1724 hash_added = batadv_hash_add(bat_priv->tt.global_hash,
1726 batadv_choose_tt, common,
1727 &common->hash_entry);
1729 if (unlikely(hash_added != 0)) {
1730 /* remove the reference for the hash */
1731 batadv_tt_global_entry_put(tt_global_entry);
1735 common = &tt_global_entry->common;
1736 /* If there is already a global entry, we can use this one for
1738 * But if we are trying to add a temporary client then here are
1739 * two options at this point:
1740 * 1) the global client is not a temporary client: the global
1741 * client has to be left as it is, temporary information
1742 * should never override any already known client state
1743 * 2) the global client is a temporary client: purge the
1744 * originator list and add the new one orig_entry
1746 if (flags & BATADV_TT_CLIENT_TEMP) {
1747 if (!(common->flags & BATADV_TT_CLIENT_TEMP))
1749 if (batadv_tt_global_entry_has_orig(tt_global_entry,
1752 batadv_tt_global_del_orig_list(tt_global_entry);
1753 goto add_orig_entry;
1756 /* if the client was temporary added before receiving the first
1757 * OGM announcing it, we have to clear the TEMP flag. Also,
1758 * remove the previous temporary orig node and re-add it
1759 * if required. If the orig entry changed, the new one which
1760 * is a non-temporary entry is preferred.
1762 if (common->flags & BATADV_TT_CLIENT_TEMP) {
1763 batadv_tt_global_del_orig_list(tt_global_entry);
1764 common->flags &= ~BATADV_TT_CLIENT_TEMP;
1767 /* the change can carry possible "attribute" flags like the
1768 * TT_CLIENT_TEMP, therefore they have to be copied in the
1771 common->flags |= flags & (~BATADV_TT_SYNC_MASK);
1773 /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only
1774 * one originator left in the list and we previously received a
1775 * delete + roaming change for this originator.
1777 * We should first delete the old originator before adding the
1780 if (common->flags & BATADV_TT_CLIENT_ROAM) {
1781 batadv_tt_global_del_orig_list(tt_global_entry);
1782 common->flags &= ~BATADV_TT_CLIENT_ROAM;
1783 tt_global_entry->roam_at = 0;
1787 /* add the new orig_entry (if needed) or update it */
1788 batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn,
1789 flags & BATADV_TT_SYNC_MASK);
1791 batadv_dbg(BATADV_DBG_TT, bat_priv,
1792 "Creating new global tt entry: %pM (vid: %d, via %pM)\n",
1793 common->addr, batadv_print_vid(common->vid),
1798 /* Do not remove multicast addresses from the local hash on
1801 if (is_multicast_ether_addr(tt_addr))
1804 /* remove address from local hash if present */
1805 local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid,
1806 "global tt received",
1807 flags & BATADV_TT_CLIENT_ROAM);
1808 tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI;
1810 if (!(flags & BATADV_TT_CLIENT_ROAM))
1811 /* this is a normal global add. Therefore the client is not in a
1812 * roaming state anymore.
1814 tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM;
1817 if (tt_global_entry)
1818 batadv_tt_global_entry_put(tt_global_entry);
1820 batadv_tt_local_entry_put(tt_local_entry);
1825 * batadv_transtable_best_orig() - Get best originator list entry from tt entry
1826 * @bat_priv: the bat priv with all the soft interface information
1827 * @tt_global_entry: global translation table entry to be analyzed
1829 * This functon assumes the caller holds rcu_read_lock().
1830 * Return: best originator list entry or NULL on errors.
1832 static struct batadv_tt_orig_list_entry *
1833 batadv_transtable_best_orig(struct batadv_priv *bat_priv,
1834 struct batadv_tt_global_entry *tt_global_entry)
1836 struct batadv_neigh_node *router, *best_router = NULL;
1837 struct batadv_algo_ops *bao = bat_priv->algo_ops;
1838 struct hlist_head *head;
1839 struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL;
1841 head = &tt_global_entry->orig_list;
1842 hlist_for_each_entry_rcu(orig_entry, head, list) {
1843 router = batadv_orig_router_get(orig_entry->orig_node,
1849 bao->neigh.cmp(router, BATADV_IF_DEFAULT, best_router,
1850 BATADV_IF_DEFAULT) <= 0) {
1851 batadv_neigh_node_put(router);
1855 /* release the refcount for the "old" best */
1857 batadv_neigh_node_put(best_router);
1859 best_entry = orig_entry;
1860 best_router = router;
1864 batadv_neigh_node_put(best_router);
1869 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1871 * batadv_tt_global_print_entry() - print all orig nodes who announce the
1872 * address for this global entry
1873 * @bat_priv: the bat priv with all the soft interface information
1874 * @tt_global_entry: global translation table entry to be printed
1875 * @seq: debugfs table seq_file struct
1877 * This functon assumes the caller holds rcu_read_lock().
1880 batadv_tt_global_print_entry(struct batadv_priv *bat_priv,
1881 struct batadv_tt_global_entry *tt_global_entry,
1882 struct seq_file *seq)
1884 struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
1885 struct batadv_tt_common_entry *tt_common_entry;
1886 struct batadv_orig_node_vlan *vlan;
1887 struct hlist_head *head;
1891 tt_common_entry = &tt_global_entry->common;
1892 flags = tt_common_entry->flags;
1894 best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
1896 vlan = batadv_orig_node_vlan_get(best_entry->orig_node,
1897 tt_common_entry->vid);
1900 " * Cannot retrieve VLAN %d for originator %pM\n",
1901 batadv_print_vid(tt_common_entry->vid),
1902 best_entry->orig_node->orig);
1906 last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn);
1908 " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1909 '*', tt_global_entry->common.addr,
1910 batadv_print_vid(tt_global_entry->common.vid),
1911 best_entry->ttvn, best_entry->orig_node->orig,
1912 last_ttvn, vlan->tt.crc,
1913 ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'),
1914 ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'),
1915 ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'),
1916 ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.'));
1918 batadv_orig_node_vlan_put(vlan);
1922 head = &tt_global_entry->orig_list;
1924 hlist_for_each_entry_rcu(orig_entry, head, list) {
1925 if (best_entry == orig_entry)
1928 vlan = batadv_orig_node_vlan_get(orig_entry->orig_node,
1929 tt_common_entry->vid);
1932 " + Cannot retrieve VLAN %d for originator %pM\n",
1933 batadv_print_vid(tt_common_entry->vid),
1934 orig_entry->orig_node->orig);
1938 last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn);
1940 " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1941 '+', tt_global_entry->common.addr,
1942 batadv_print_vid(tt_global_entry->common.vid),
1943 orig_entry->ttvn, orig_entry->orig_node->orig,
1944 last_ttvn, vlan->tt.crc,
1945 ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'),
1946 ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'),
1947 ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'),
1948 ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.'));
1950 batadv_orig_node_vlan_put(vlan);
1955 * batadv_tt_global_seq_print_text() - Print the global tt table in a seq file
1956 * @seq: seq file to print on
1961 int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset)
1963 struct net_device *net_dev = (struct net_device *)seq->private;
1964 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1965 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
1966 struct batadv_tt_common_entry *tt_common_entry;
1967 struct batadv_tt_global_entry *tt_global;
1968 struct batadv_hard_iface *primary_if;
1969 struct hlist_head *head;
1972 primary_if = batadv_seq_print_text_primary_if_get(seq);
1977 "Globally announced TT entries received via the mesh %s\n",
1980 " Client VID (TTVN) Originator (Curr TTVN) (CRC ) Flags\n");
1982 for (i = 0; i < hash->size; i++) {
1983 head = &hash->table[i];
1986 hlist_for_each_entry_rcu(tt_common_entry,
1988 tt_global = container_of(tt_common_entry,
1989 struct batadv_tt_global_entry,
1991 batadv_tt_global_print_entry(bat_priv, tt_global, seq);
1997 batadv_hardif_put(primary_if);
2003 * batadv_tt_global_dump_subentry() - Dump all TT local entries into a message
2004 * @msg: Netlink message to dump into
2005 * @portid: Port making netlink request
2006 * @seq: Sequence number of netlink message
2007 * @common: tt local & tt global common data
2008 * @orig: Originator node announcing a non-mesh client
2009 * @best: Is the best originator for the TT entry
2011 * Return: Error code, or 0 on success
2014 batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq,
2015 struct batadv_tt_common_entry *common,
2016 struct batadv_tt_orig_list_entry *orig,
2019 u16 flags = (common->flags & (~BATADV_TT_SYNC_MASK)) | orig->flags;
2021 struct batadv_orig_node_vlan *vlan;
2025 vlan = batadv_orig_node_vlan_get(orig->orig_node,
2032 batadv_orig_node_vlan_put(vlan);
2034 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
2036 BATADV_CMD_GET_TRANSTABLE_GLOBAL);
2040 last_ttvn = atomic_read(&orig->orig_node->last_ttvn);
2042 if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) ||
2043 nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN,
2044 orig->orig_node->orig) ||
2045 nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) ||
2046 nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) ||
2047 nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) ||
2048 nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) ||
2049 nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, flags))
2050 goto nla_put_failure;
2052 if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST))
2053 goto nla_put_failure;
2055 genlmsg_end(msg, hdr);
2059 genlmsg_cancel(msg, hdr);
2064 * batadv_tt_global_dump_entry() - Dump one TT global entry into a message
2065 * @msg: Netlink message to dump into
2066 * @portid: Port making netlink request
2067 * @seq: Sequence number of netlink message
2068 * @bat_priv: The bat priv with all the soft interface information
2069 * @common: tt local & tt global common data
2070 * @sub_s: Number of entries to skip
2072 * This function assumes the caller holds rcu_read_lock().
2074 * Return: Error code, or 0 on success
2077 batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
2078 struct batadv_priv *bat_priv,
2079 struct batadv_tt_common_entry *common, int *sub_s)
2081 struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
2082 struct batadv_tt_global_entry *global;
2083 struct hlist_head *head;
2087 global = container_of(common, struct batadv_tt_global_entry, common);
2088 best_entry = batadv_transtable_best_orig(bat_priv, global);
2089 head = &global->orig_list;
2091 hlist_for_each_entry_rcu(orig_entry, head, list) {
2095 best = (orig_entry == best_entry);
2097 if (batadv_tt_global_dump_subentry(msg, portid, seq, common,
2098 orig_entry, best)) {
2109 * batadv_tt_global_dump_bucket() - Dump one TT local bucket into a message
2110 * @msg: Netlink message to dump into
2111 * @portid: Port making netlink request
2112 * @seq: Sequence number of netlink message
2113 * @bat_priv: The bat priv with all the soft interface information
2114 * @head: Pointer to the list containing the global tt entries
2115 * @idx_s: Number of entries to skip
2116 * @sub: Number of entries to skip
2118 * Return: Error code, or 0 on success
2121 batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq,
2122 struct batadv_priv *bat_priv,
2123 struct hlist_head *head, int *idx_s, int *sub)
2125 struct batadv_tt_common_entry *common;
2129 hlist_for_each_entry_rcu(common, head, hash_entry) {
2133 if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv,
2148 * batadv_tt_global_dump() - Dump TT global entries into a message
2149 * @msg: Netlink message to dump into
2150 * @cb: Parameters from query
2152 * Return: Error code, or length of message on success
2154 int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb)
2156 struct net *net = sock_net(cb->skb->sk);
2157 struct net_device *soft_iface;
2158 struct batadv_priv *bat_priv;
2159 struct batadv_hard_iface *primary_if = NULL;
2160 struct batadv_hashtable *hash;
2161 struct hlist_head *head;
2164 int bucket = cb->args[0];
2165 int idx = cb->args[1];
2166 int sub = cb->args[2];
2167 int portid = NETLINK_CB(cb->skb).portid;
2169 ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
2173 soft_iface = dev_get_by_index(net, ifindex);
2174 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
2179 bat_priv = netdev_priv(soft_iface);
2181 primary_if = batadv_primary_if_get_selected(bat_priv);
2182 if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
2187 hash = bat_priv->tt.global_hash;
2189 while (bucket < hash->size) {
2190 head = &hash->table[bucket];
2192 if (batadv_tt_global_dump_bucket(msg, portid,
2193 cb->nlh->nlmsg_seq, bat_priv,
2204 batadv_hardif_put(primary_if);
2206 dev_put(soft_iface);
2208 cb->args[0] = bucket;
2216 * _batadv_tt_global_del_orig_entry() - remove and free an orig_entry
2217 * @tt_global_entry: the global entry to remove the orig_entry from
2218 * @orig_entry: the orig entry to remove and free
2220 * Remove an orig_entry from its list in the given tt_global_entry and
2221 * free this orig_entry afterwards.
2223 * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is
2227 _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry,
2228 struct batadv_tt_orig_list_entry *orig_entry)
2230 lockdep_assert_held(&tt_global_entry->list_lock);
2232 batadv_tt_global_size_dec(orig_entry->orig_node,
2233 tt_global_entry->common.vid);
2234 atomic_dec(&tt_global_entry->orig_list_count);
2235 /* requires holding tt_global_entry->list_lock and orig_entry->list
2236 * being part of a list
2238 hlist_del_rcu(&orig_entry->list);
2239 batadv_tt_orig_list_entry_put(orig_entry);
2242 /* deletes the orig list of a tt_global_entry */
2244 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry)
2246 struct hlist_head *head;
2247 struct hlist_node *safe;
2248 struct batadv_tt_orig_list_entry *orig_entry;
2250 spin_lock_bh(&tt_global_entry->list_lock);
2251 head = &tt_global_entry->orig_list;
2252 hlist_for_each_entry_safe(orig_entry, safe, head, list)
2253 _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry);
2254 spin_unlock_bh(&tt_global_entry->list_lock);
2258 * batadv_tt_global_del_orig_node() - remove orig_node from a global tt entry
2259 * @bat_priv: the bat priv with all the soft interface information
2260 * @tt_global_entry: the global entry to remove the orig_node from
2261 * @orig_node: the originator announcing the client
2262 * @message: message to append to the log on deletion
2264 * Remove the given orig_node and its according orig_entry from the given
2268 batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv,
2269 struct batadv_tt_global_entry *tt_global_entry,
2270 struct batadv_orig_node *orig_node,
2271 const char *message)
2273 struct hlist_head *head;
2274 struct hlist_node *safe;
2275 struct batadv_tt_orig_list_entry *orig_entry;
2278 spin_lock_bh(&tt_global_entry->list_lock);
2279 head = &tt_global_entry->orig_list;
2280 hlist_for_each_entry_safe(orig_entry, safe, head, list) {
2281 if (orig_entry->orig_node == orig_node) {
2282 vid = tt_global_entry->common.vid;
2283 batadv_dbg(BATADV_DBG_TT, bat_priv,
2284 "Deleting %pM from global tt entry %pM (vid: %d): %s\n",
2286 tt_global_entry->common.addr,
2287 batadv_print_vid(vid), message);
2288 _batadv_tt_global_del_orig_entry(tt_global_entry,
2292 spin_unlock_bh(&tt_global_entry->list_lock);
2295 /* If the client is to be deleted, we check if it is the last origantor entry
2296 * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the
2297 * timer, otherwise we simply remove the originator scheduled for deletion.
2300 batadv_tt_global_del_roaming(struct batadv_priv *bat_priv,
2301 struct batadv_tt_global_entry *tt_global_entry,
2302 struct batadv_orig_node *orig_node,
2303 const char *message)
2305 bool last_entry = true;
2306 struct hlist_head *head;
2307 struct batadv_tt_orig_list_entry *orig_entry;
2309 /* no local entry exists, case 1:
2310 * Check if this is the last one or if other entries exist.
2314 head = &tt_global_entry->orig_list;
2315 hlist_for_each_entry_rcu(orig_entry, head, list) {
2316 if (orig_entry->orig_node != orig_node) {
2324 /* its the last one, mark for roaming. */
2325 tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM;
2326 tt_global_entry->roam_at = jiffies;
2328 /* there is another entry, we can simply delete this
2329 * one and can still use the other one.
2331 batadv_tt_global_del_orig_node(bat_priv, tt_global_entry,
2332 orig_node, message);
2337 * batadv_tt_global_del() - remove a client from the global table
2338 * @bat_priv: the bat priv with all the soft interface information
2339 * @orig_node: an originator serving this client
2340 * @addr: the mac address of the client
2341 * @vid: VLAN identifier
2342 * @message: a message explaining the reason for deleting the client to print
2343 * for debugging purpose
2344 * @roaming: true if the deletion has been triggered by a roaming event
2346 static void batadv_tt_global_del(struct batadv_priv *bat_priv,
2347 struct batadv_orig_node *orig_node,
2348 const unsigned char *addr, unsigned short vid,
2349 const char *message, bool roaming)
2351 struct batadv_tt_global_entry *tt_global_entry;
2352 struct batadv_tt_local_entry *local_entry = NULL;
2354 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
2355 if (!tt_global_entry)
2359 batadv_tt_global_del_orig_node(bat_priv, tt_global_entry,
2360 orig_node, message);
2362 if (hlist_empty(&tt_global_entry->orig_list))
2363 batadv_tt_global_free(bat_priv, tt_global_entry,
2369 /* if we are deleting a global entry due to a roam
2370 * event, there are two possibilities:
2371 * 1) the client roamed from node A to node B => if there
2372 * is only one originator left for this client, we mark
2373 * it with BATADV_TT_CLIENT_ROAM, we start a timer and we
2374 * wait for node B to claim it. In case of timeout
2375 * the entry is purged.
2377 * If there are other originators left, we directly delete
2379 * 2) the client roamed to us => we can directly delete
2380 * the global entry, since it is useless now.
2382 local_entry = batadv_tt_local_hash_find(bat_priv,
2383 tt_global_entry->common.addr,
2386 /* local entry exists, case 2: client roamed to us. */
2387 batadv_tt_global_del_orig_list(tt_global_entry);
2388 batadv_tt_global_free(bat_priv, tt_global_entry, message);
2390 /* no local entry exists, case 1: check for roaming */
2391 batadv_tt_global_del_roaming(bat_priv, tt_global_entry,
2392 orig_node, message);
2396 if (tt_global_entry)
2397 batadv_tt_global_entry_put(tt_global_entry);
2399 batadv_tt_local_entry_put(local_entry);
2403 * batadv_tt_global_del_orig() - remove all the TT global entries belonging to
2404 * the given originator matching the provided vid
2405 * @bat_priv: the bat priv with all the soft interface information
2406 * @orig_node: the originator owning the entries to remove
2407 * @match_vid: the VLAN identifier to match. If negative all the entries will be
2409 * @message: debug message to print as "reason"
2411 void batadv_tt_global_del_orig(struct batadv_priv *bat_priv,
2412 struct batadv_orig_node *orig_node,
2414 const char *message)
2416 struct batadv_tt_global_entry *tt_global;
2417 struct batadv_tt_common_entry *tt_common_entry;
2419 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2420 struct hlist_node *safe;
2421 struct hlist_head *head;
2422 spinlock_t *list_lock; /* protects write access to the hash lists */
2428 for (i = 0; i < hash->size; i++) {
2429 head = &hash->table[i];
2430 list_lock = &hash->list_locks[i];
2432 spin_lock_bh(list_lock);
2433 hlist_for_each_entry_safe(tt_common_entry, safe,
2435 /* remove only matching entries */
2436 if (match_vid >= 0 && tt_common_entry->vid != match_vid)
2439 tt_global = container_of(tt_common_entry,
2440 struct batadv_tt_global_entry,
2443 batadv_tt_global_del_orig_node(bat_priv, tt_global,
2444 orig_node, message);
2446 if (hlist_empty(&tt_global->orig_list)) {
2447 vid = tt_global->common.vid;
2448 batadv_dbg(BATADV_DBG_TT, bat_priv,
2449 "Deleting global tt entry %pM (vid: %d): %s\n",
2450 tt_global->common.addr,
2451 batadv_print_vid(vid), message);
2452 hlist_del_rcu(&tt_common_entry->hash_entry);
2453 batadv_tt_global_entry_put(tt_global);
2456 spin_unlock_bh(list_lock);
2458 clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized);
2461 static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global,
2465 unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT;
2466 unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT;
2468 if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) &&
2469 batadv_has_timed_out(tt_global->roam_at, roam_timeout)) {
2471 *msg = "Roaming timeout\n";
2474 if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) &&
2475 batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) {
2477 *msg = "Temporary client timeout\n";
2483 static void batadv_tt_global_purge(struct batadv_priv *bat_priv)
2485 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2486 struct hlist_head *head;
2487 struct hlist_node *node_tmp;
2488 spinlock_t *list_lock; /* protects write access to the hash lists */
2491 struct batadv_tt_common_entry *tt_common;
2492 struct batadv_tt_global_entry *tt_global;
2494 for (i = 0; i < hash->size; i++) {
2495 head = &hash->table[i];
2496 list_lock = &hash->list_locks[i];
2498 spin_lock_bh(list_lock);
2499 hlist_for_each_entry_safe(tt_common, node_tmp, head,
2501 tt_global = container_of(tt_common,
2502 struct batadv_tt_global_entry,
2505 if (!batadv_tt_global_to_purge(tt_global, &msg))
2508 batadv_dbg(BATADV_DBG_TT, bat_priv,
2509 "Deleting global tt entry %pM (vid: %d): %s\n",
2510 tt_global->common.addr,
2511 batadv_print_vid(tt_global->common.vid),
2514 hlist_del_rcu(&tt_common->hash_entry);
2516 batadv_tt_global_entry_put(tt_global);
2518 spin_unlock_bh(list_lock);
2522 static void batadv_tt_global_table_free(struct batadv_priv *bat_priv)
2524 struct batadv_hashtable *hash;
2525 spinlock_t *list_lock; /* protects write access to the hash lists */
2526 struct batadv_tt_common_entry *tt_common_entry;
2527 struct batadv_tt_global_entry *tt_global;
2528 struct hlist_node *node_tmp;
2529 struct hlist_head *head;
2532 if (!bat_priv->tt.global_hash)
2535 hash = bat_priv->tt.global_hash;
2537 for (i = 0; i < hash->size; i++) {
2538 head = &hash->table[i];
2539 list_lock = &hash->list_locks[i];
2541 spin_lock_bh(list_lock);
2542 hlist_for_each_entry_safe(tt_common_entry, node_tmp,
2544 hlist_del_rcu(&tt_common_entry->hash_entry);
2545 tt_global = container_of(tt_common_entry,
2546 struct batadv_tt_global_entry,
2548 batadv_tt_global_entry_put(tt_global);
2550 spin_unlock_bh(list_lock);
2553 batadv_hash_destroy(hash);
2555 bat_priv->tt.global_hash = NULL;
2559 _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry,
2560 struct batadv_tt_global_entry *tt_global_entry)
2562 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI &&
2563 tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI)
2566 /* check if the two clients are marked as isolated */
2567 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA &&
2568 tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA)
2575 * batadv_transtable_search() - get the mesh destination for a given client
2576 * @bat_priv: the bat priv with all the soft interface information
2577 * @src: mac address of the source client
2578 * @addr: mac address of the destination client
2579 * @vid: VLAN identifier
2581 * Return: a pointer to the originator that was selected as destination in the
2582 * mesh for contacting the client 'addr', NULL otherwise.
2583 * In case of multiple originators serving the same client, the function returns
2584 * the best one (best in terms of metric towards the destination node).
2586 * If the two clients are AP isolated the function returns NULL.
2588 struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv,
2593 struct batadv_tt_local_entry *tt_local_entry = NULL;
2594 struct batadv_tt_global_entry *tt_global_entry = NULL;
2595 struct batadv_orig_node *orig_node = NULL;
2596 struct batadv_tt_orig_list_entry *best_entry;
2598 if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) {
2599 tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid);
2600 if (!tt_local_entry ||
2601 (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING))
2605 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
2606 if (!tt_global_entry)
2609 /* check whether the clients should not communicate due to AP
2612 if (tt_local_entry &&
2613 _batadv_is_ap_isolated(tt_local_entry, tt_global_entry))
2617 best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
2618 /* found anything? */
2620 orig_node = best_entry->orig_node;
2621 if (orig_node && !kref_get_unless_zero(&orig_node->refcount))
2626 if (tt_global_entry)
2627 batadv_tt_global_entry_put(tt_global_entry);
2629 batadv_tt_local_entry_put(tt_local_entry);
2635 * batadv_tt_global_crc() - calculates the checksum of the local table belonging
2636 * to the given orig_node
2637 * @bat_priv: the bat priv with all the soft interface information
2638 * @orig_node: originator for which the CRC should be computed
2639 * @vid: VLAN identifier for which the CRC32 has to be computed
2641 * This function computes the checksum for the global table corresponding to a
2642 * specific originator. In particular, the checksum is computed as follows: For
2643 * each client connected to the originator the CRC32C of the MAC address and the
2644 * VID is computed and then all the CRC32Cs of the various clients are xor'ed
2647 * The idea behind is that CRC32C should be used as much as possible in order to
2648 * produce a unique hash of the table, but since the order which is used to feed
2649 * the CRC32C function affects the result and since every node in the network
2650 * probably sorts the clients differently, the hash function cannot be directly
2651 * computed over the entire table. Hence the CRC32C is used only on
2652 * the single client entry, while all the results are then xor'ed together
2653 * because the XOR operation can combine them all while trying to reduce the
2654 * noise as much as possible.
2656 * Return: the checksum of the global table of a given originator.
2658 static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv,
2659 struct batadv_orig_node *orig_node,
2662 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2663 struct batadv_tt_orig_list_entry *tt_orig;
2664 struct batadv_tt_common_entry *tt_common;
2665 struct batadv_tt_global_entry *tt_global;
2666 struct hlist_head *head;
2667 u32 i, crc_tmp, crc = 0;
2671 for (i = 0; i < hash->size; i++) {
2672 head = &hash->table[i];
2675 hlist_for_each_entry_rcu(tt_common, head, hash_entry) {
2676 tt_global = container_of(tt_common,
2677 struct batadv_tt_global_entry,
2679 /* compute the CRC only for entries belonging to the
2680 * VLAN identified by the vid passed as parameter
2682 if (tt_common->vid != vid)
2685 /* Roaming clients are in the global table for
2686 * consistency only. They don't have to be
2687 * taken into account while computing the
2690 if (tt_common->flags & BATADV_TT_CLIENT_ROAM)
2692 /* Temporary clients have not been announced yet, so
2693 * they have to be skipped while computing the global
2696 if (tt_common->flags & BATADV_TT_CLIENT_TEMP)
2699 /* find out if this global entry is announced by this
2702 tt_orig = batadv_tt_global_orig_entry_find(tt_global,
2707 /* use network order to read the VID: this ensures that
2708 * every node reads the bytes in the same order.
2710 tmp_vid = htons(tt_common->vid);
2711 crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid));
2713 /* compute the CRC on flags that have to be kept in sync
2716 flags = tt_orig->flags;
2717 crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
2719 crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
2721 batadv_tt_orig_list_entry_put(tt_orig);
2730 * batadv_tt_local_crc() - calculates the checksum of the local table
2731 * @bat_priv: the bat priv with all the soft interface information
2732 * @vid: VLAN identifier for which the CRC32 has to be computed
2734 * For details about the computation, please refer to the documentation for
2735 * batadv_tt_global_crc().
2737 * Return: the checksum of the local table
2739 static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv,
2742 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
2743 struct batadv_tt_common_entry *tt_common;
2744 struct hlist_head *head;
2745 u32 i, crc_tmp, crc = 0;
2749 for (i = 0; i < hash->size; i++) {
2750 head = &hash->table[i];
2753 hlist_for_each_entry_rcu(tt_common, head, hash_entry) {
2754 /* compute the CRC only for entries belonging to the
2755 * VLAN identified by vid
2757 if (tt_common->vid != vid)
2760 /* not yet committed clients have not to be taken into
2761 * account while computing the CRC
2763 if (tt_common->flags & BATADV_TT_CLIENT_NEW)
2766 /* use network order to read the VID: this ensures that
2767 * every node reads the bytes in the same order.
2769 tmp_vid = htons(tt_common->vid);
2770 crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid));
2772 /* compute the CRC on flags that have to be kept in sync
2775 flags = tt_common->flags & BATADV_TT_SYNC_MASK;
2776 crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
2778 crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
2787 * batadv_tt_req_node_release() - free tt_req node entry
2788 * @ref: kref pointer of the tt req_node entry
2790 static void batadv_tt_req_node_release(struct kref *ref)
2792 struct batadv_tt_req_node *tt_req_node;
2794 tt_req_node = container_of(ref, struct batadv_tt_req_node, refcount);
2796 kmem_cache_free(batadv_tt_req_cache, tt_req_node);
2800 * batadv_tt_req_node_put() - decrement the tt_req_node refcounter and
2801 * possibly release it
2802 * @tt_req_node: tt_req_node to be free'd
2804 static void batadv_tt_req_node_put(struct batadv_tt_req_node *tt_req_node)
2806 kref_put(&tt_req_node->refcount, batadv_tt_req_node_release);
2809 static void batadv_tt_req_list_free(struct batadv_priv *bat_priv)
2811 struct batadv_tt_req_node *node;
2812 struct hlist_node *safe;
2814 spin_lock_bh(&bat_priv->tt.req_list_lock);
2816 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
2817 hlist_del_init(&node->list);
2818 batadv_tt_req_node_put(node);
2821 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2824 static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv,
2825 struct batadv_orig_node *orig_node,
2826 const void *tt_buff,
2829 /* Replace the old buffer only if I received something in the
2830 * last OGM (the OGM could carry no changes)
2832 spin_lock_bh(&orig_node->tt_buff_lock);
2833 if (tt_buff_len > 0) {
2834 kfree(orig_node->tt_buff);
2835 orig_node->tt_buff_len = 0;
2836 orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC);
2837 if (orig_node->tt_buff) {
2838 memcpy(orig_node->tt_buff, tt_buff, tt_buff_len);
2839 orig_node->tt_buff_len = tt_buff_len;
2842 spin_unlock_bh(&orig_node->tt_buff_lock);
2845 static void batadv_tt_req_purge(struct batadv_priv *bat_priv)
2847 struct batadv_tt_req_node *node;
2848 struct hlist_node *safe;
2850 spin_lock_bh(&bat_priv->tt.req_list_lock);
2851 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
2852 if (batadv_has_timed_out(node->issued_at,
2853 BATADV_TT_REQUEST_TIMEOUT)) {
2854 hlist_del_init(&node->list);
2855 batadv_tt_req_node_put(node);
2858 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2862 * batadv_tt_req_node_new() - search and possibly create a tt_req_node object
2863 * @bat_priv: the bat priv with all the soft interface information
2864 * @orig_node: orig node this request is being issued for
2866 * Return: the pointer to the new tt_req_node struct if no request
2867 * has already been issued for this orig_node, NULL otherwise.
2869 static struct batadv_tt_req_node *
2870 batadv_tt_req_node_new(struct batadv_priv *bat_priv,
2871 struct batadv_orig_node *orig_node)
2873 struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL;
2875 spin_lock_bh(&bat_priv->tt.req_list_lock);
2876 hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) {
2877 if (batadv_compare_eth(tt_req_node_tmp, orig_node) &&
2878 !batadv_has_timed_out(tt_req_node_tmp->issued_at,
2879 BATADV_TT_REQUEST_TIMEOUT))
2883 tt_req_node = kmem_cache_alloc(batadv_tt_req_cache, GFP_ATOMIC);
2887 kref_init(&tt_req_node->refcount);
2888 ether_addr_copy(tt_req_node->addr, orig_node->orig);
2889 tt_req_node->issued_at = jiffies;
2891 kref_get(&tt_req_node->refcount);
2892 hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list);
2894 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2899 * batadv_tt_local_valid() - verify local tt entry and get flags
2900 * @entry_ptr: to be checked local tt entry
2901 * @data_ptr: not used but definition required to satisfy the callback prototype
2902 * @flags: a pointer to store TT flags for this client to
2904 * Checks the validity of the given local TT entry. If it is, then the provided
2905 * flags pointer is updated.
2907 * Return: true if the entry is a valid, false otherwise.
2909 static bool batadv_tt_local_valid(const void *entry_ptr,
2910 const void *data_ptr,
2913 const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
2915 if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW)
2919 *flags = tt_common_entry->flags;
2925 * batadv_tt_global_valid() - verify global tt entry and get flags
2926 * @entry_ptr: to be checked global tt entry
2927 * @data_ptr: an orig_node object (may be NULL)
2928 * @flags: a pointer to store TT flags for this client to
2930 * Checks the validity of the given global TT entry. If it is, then the provided
2931 * flags pointer is updated either with the common (summed) TT flags if data_ptr
2932 * is NULL or the specific, per originator TT flags otherwise.
2934 * Return: true if the entry is a valid, false otherwise.
2936 static bool batadv_tt_global_valid(const void *entry_ptr,
2937 const void *data_ptr,
2940 const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
2941 const struct batadv_tt_global_entry *tt_global_entry;
2942 const struct batadv_orig_node *orig_node = data_ptr;
2944 if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM ||
2945 tt_common_entry->flags & BATADV_TT_CLIENT_TEMP)
2948 tt_global_entry = container_of(tt_common_entry,
2949 struct batadv_tt_global_entry,
2952 return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node,
2957 * batadv_tt_tvlv_generate() - fill the tvlv buff with the tt entries from the
2959 * @bat_priv: the bat priv with all the soft interface information
2960 * @hash: hash table containing the tt entries
2961 * @tt_len: expected tvlv tt data buffer length in number of bytes
2962 * @tvlv_buff: pointer to the buffer to fill with the TT data
2963 * @valid_cb: function to filter tt change entries and to return TT flags
2964 * @cb_data: data passed to the filter function as argument
2966 * Fills the tvlv buff with the tt entries from the specified hash. If valid_cb
2967 * is not provided then this becomes a no-op.
2969 static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
2970 struct batadv_hashtable *hash,
2971 void *tvlv_buff, u16 tt_len,
2972 bool (*valid_cb)(const void *,
2977 struct batadv_tt_common_entry *tt_common_entry;
2978 struct batadv_tvlv_tt_change *tt_change;
2979 struct hlist_head *head;
2980 u16 tt_tot, tt_num_entries = 0;
2985 tt_tot = batadv_tt_entries(tt_len);
2986 tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff;
2992 for (i = 0; i < hash->size; i++) {
2993 head = &hash->table[i];
2995 hlist_for_each_entry_rcu(tt_common_entry,
2997 if (tt_tot == tt_num_entries)
3000 ret = valid_cb(tt_common_entry, cb_data, &flags);
3004 ether_addr_copy(tt_change->addr, tt_common_entry->addr);
3005 tt_change->flags = flags;
3006 tt_change->vid = htons(tt_common_entry->vid);
3007 memset(tt_change->reserved, 0,
3008 sizeof(tt_change->reserved));
3018 * batadv_tt_global_check_crc() - check if all the CRCs are correct
3019 * @orig_node: originator for which the CRCs have to be checked
3020 * @tt_vlan: pointer to the first tvlv VLAN entry
3021 * @num_vlan: number of tvlv VLAN entries
3023 * Return: true if all the received CRCs match the locally stored ones, false
3026 static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node,
3027 struct batadv_tvlv_tt_vlan_data *tt_vlan,
3030 struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp;
3031 struct batadv_orig_node_vlan *vlan;
3032 int i, orig_num_vlan;
3035 /* check if each received CRC matches the locally stored one */
3036 for (i = 0; i < num_vlan; i++) {
3037 tt_vlan_tmp = tt_vlan + i;
3039 /* if orig_node is a backbone node for this VLAN, don't check
3040 * the CRC as we ignore all the global entries over it
3042 if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv,
3044 ntohs(tt_vlan_tmp->vid)))
3047 vlan = batadv_orig_node_vlan_get(orig_node,
3048 ntohs(tt_vlan_tmp->vid));
3053 batadv_orig_node_vlan_put(vlan);
3055 if (crc != ntohl(tt_vlan_tmp->crc))
3059 /* check if any excess VLANs exist locally for the originator
3060 * which are not mentioned in the TVLV from the originator.
3064 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list)
3068 if (orig_num_vlan > num_vlan)
3075 * batadv_tt_local_update_crc() - update all the local CRCs
3076 * @bat_priv: the bat priv with all the soft interface information
3078 static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv)
3080 struct batadv_softif_vlan *vlan;
3082 /* recompute the global CRC for each VLAN */
3084 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
3085 vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid);
3091 * batadv_tt_global_update_crc() - update all the global CRCs for this orig_node
3092 * @bat_priv: the bat priv with all the soft interface information
3093 * @orig_node: the orig_node for which the CRCs have to be updated
3095 static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv,
3096 struct batadv_orig_node *orig_node)
3098 struct batadv_orig_node_vlan *vlan;
3101 /* recompute the global CRC for each VLAN */
3103 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
3104 /* if orig_node is a backbone node for this VLAN, don't compute
3105 * the CRC as we ignore all the global entries over it
3107 if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig,
3111 crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid);
3118 * batadv_send_tt_request() - send a TT Request message to a given node
3119 * @bat_priv: the bat priv with all the soft interface information
3120 * @dst_orig_node: the destination of the message
3121 * @ttvn: the version number that the source of the message is looking for
3122 * @tt_vlan: pointer to the first tvlv VLAN object to request
3123 * @num_vlan: number of tvlv VLAN entries
3124 * @full_table: ask for the entire translation table if true, while only for the
3125 * last TT diff otherwise
3127 * Return: true if the TT Request was sent, false otherwise
3129 static bool batadv_send_tt_request(struct batadv_priv *bat_priv,
3130 struct batadv_orig_node *dst_orig_node,
3132 struct batadv_tvlv_tt_vlan_data *tt_vlan,
3133 u16 num_vlan, bool full_table)
3135 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3136 struct batadv_tt_req_node *tt_req_node = NULL;
3137 struct batadv_tvlv_tt_vlan_data *tt_vlan_req;
3138 struct batadv_hard_iface *primary_if;
3142 primary_if = batadv_primary_if_get_selected(bat_priv);
3146 /* The new tt_req will be issued only if I'm not waiting for a
3147 * reply from the same orig_node yet
3149 tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node);
3153 size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan;
3154 tvlv_tt_data = kzalloc(size, GFP_ATOMIC);
3158 tvlv_tt_data->flags = BATADV_TT_REQUEST;
3159 tvlv_tt_data->ttvn = ttvn;
3160 tvlv_tt_data->num_vlan = htons(num_vlan);
3162 /* send all the CRCs within the request. This is needed by intermediate
3163 * nodes to ensure they have the correct table before replying
3165 tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1);
3166 for (i = 0; i < num_vlan; i++) {
3167 tt_vlan_req->vid = tt_vlan->vid;
3168 tt_vlan_req->crc = tt_vlan->crc;
3175 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3177 batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n",
3178 dst_orig_node->orig, full_table ? 'F' : '.');
3180 batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX);
3181 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3182 dst_orig_node->orig, BATADV_TVLV_TT, 1,
3183 tvlv_tt_data, size);
3188 batadv_hardif_put(primary_if);
3190 if (ret && tt_req_node) {
3191 spin_lock_bh(&bat_priv->tt.req_list_lock);
3192 if (!hlist_unhashed(&tt_req_node->list)) {
3193 hlist_del_init(&tt_req_node->list);
3194 batadv_tt_req_node_put(tt_req_node);
3196 spin_unlock_bh(&bat_priv->tt.req_list_lock);
3200 batadv_tt_req_node_put(tt_req_node);
3202 kfree(tvlv_tt_data);
3207 * batadv_send_other_tt_response() - send reply to tt request concerning another
3208 * node's translation table
3209 * @bat_priv: the bat priv with all the soft interface information
3210 * @tt_data: tt data containing the tt request information
3211 * @req_src: mac address of tt request sender
3212 * @req_dst: mac address of tt request recipient
3214 * Return: true if tt request reply was sent, false otherwise.
3216 static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv,
3217 struct batadv_tvlv_tt_data *tt_data,
3218 u8 *req_src, u8 *req_dst)
3220 struct batadv_orig_node *req_dst_orig_node;
3221 struct batadv_orig_node *res_dst_orig_node = NULL;
3222 struct batadv_tvlv_tt_change *tt_change;
3223 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3224 struct batadv_tvlv_tt_vlan_data *tt_vlan;
3225 bool ret = false, full_table;
3226 u8 orig_ttvn, req_ttvn;
3230 batadv_dbg(BATADV_DBG_TT, bat_priv,
3231 "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n",
3232 req_src, tt_data->ttvn, req_dst,
3233 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3235 /* Let's get the orig node of the REAL destination */
3236 req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst);
3237 if (!req_dst_orig_node)
3240 res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src);
3241 if (!res_dst_orig_node)
3244 orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn);
3245 req_ttvn = tt_data->ttvn;
3247 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
3248 /* this node doesn't have the requested data */
3249 if (orig_ttvn != req_ttvn ||
3250 !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan,
3251 ntohs(tt_data->num_vlan)))
3254 /* If the full table has been explicitly requested */
3255 if (tt_data->flags & BATADV_TT_FULL_TABLE ||
3256 !req_dst_orig_node->tt_buff)
3261 /* TT fragmentation hasn't been implemented yet, so send as many
3262 * TT entries fit a single packet as possible only
3265 spin_lock_bh(&req_dst_orig_node->tt_buff_lock);
3266 tt_len = req_dst_orig_node->tt_buff_len;
3268 tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
3275 /* Copy the last orig_node's OGM buffer */
3276 memcpy(tt_change, req_dst_orig_node->tt_buff,
3277 req_dst_orig_node->tt_buff_len);
3278 spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
3280 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3281 * in the initial part
3284 tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
3291 /* fill the rest of the tvlv with the real TT entries */
3292 batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash,
3294 batadv_tt_global_valid,
3298 /* Don't send the response, if larger than fragmented packet. */
3299 tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len;
3300 if (tt_len > atomic_read(&bat_priv->packet_size_max)) {
3301 net_ratelimited_function(batadv_info, bat_priv->soft_iface,
3302 "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n",
3303 res_dst_orig_node->orig);
3307 tvlv_tt_data->flags = BATADV_TT_RESPONSE;
3308 tvlv_tt_data->ttvn = req_ttvn;
3311 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3313 batadv_dbg(BATADV_DBG_TT, bat_priv,
3314 "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n",
3315 res_dst_orig_node->orig, req_dst_orig_node->orig,
3316 full_table ? 'F' : '.', req_ttvn);
3318 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
3320 batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig,
3321 req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
3328 spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
3331 if (res_dst_orig_node)
3332 batadv_orig_node_put(res_dst_orig_node);
3333 if (req_dst_orig_node)
3334 batadv_orig_node_put(req_dst_orig_node);
3335 kfree(tvlv_tt_data);
3340 * batadv_send_my_tt_response() - send reply to tt request concerning this
3341 * node's translation table
3342 * @bat_priv: the bat priv with all the soft interface information
3343 * @tt_data: tt data containing the tt request information
3344 * @req_src: mac address of tt request sender
3346 * Return: true if tt request reply was sent, false otherwise.
3348 static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv,
3349 struct batadv_tvlv_tt_data *tt_data,
3352 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3353 struct batadv_hard_iface *primary_if = NULL;
3354 struct batadv_tvlv_tt_change *tt_change;
3355 struct batadv_orig_node *orig_node;
3356 u8 my_ttvn, req_ttvn;
3361 batadv_dbg(BATADV_DBG_TT, bat_priv,
3362 "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
3363 req_src, tt_data->ttvn,
3364 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3366 spin_lock_bh(&bat_priv->tt.commit_lock);
3368 my_ttvn = (u8)atomic_read(&bat_priv->tt.vn);
3369 req_ttvn = tt_data->ttvn;
3371 orig_node = batadv_orig_hash_find(bat_priv, req_src);
3375 primary_if = batadv_primary_if_get_selected(bat_priv);
3379 /* If the full table has been explicitly requested or the gap
3380 * is too big send the whole local translation table
3382 if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn ||
3383 !bat_priv->tt.last_changeset)
3388 /* TT fragmentation hasn't been implemented yet, so send as many
3389 * TT entries fit a single packet as possible only
3392 spin_lock_bh(&bat_priv->tt.last_changeset_lock);
3394 tt_len = bat_priv->tt.last_changeset_len;
3395 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
3399 if (!tt_len || !tvlv_len)
3402 /* Copy the last orig_node's OGM buffer */
3403 memcpy(tt_change, bat_priv->tt.last_changeset,
3404 bat_priv->tt.last_changeset_len);
3405 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
3407 req_ttvn = (u8)atomic_read(&bat_priv->tt.vn);
3409 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3410 * in the initial part
3413 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
3417 if (!tt_len || !tvlv_len)
3420 /* fill the rest of the tvlv with the real TT entries */
3421 batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash,
3423 batadv_tt_local_valid, NULL);
3426 tvlv_tt_data->flags = BATADV_TT_RESPONSE;
3427 tvlv_tt_data->ttvn = req_ttvn;
3430 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3432 batadv_dbg(BATADV_DBG_TT, bat_priv,
3433 "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n",
3434 orig_node->orig, full_table ? 'F' : '.', req_ttvn);
3436 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
3438 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3439 req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
3445 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
3447 spin_unlock_bh(&bat_priv->tt.commit_lock);
3449 batadv_orig_node_put(orig_node);
3451 batadv_hardif_put(primary_if);
3452 kfree(tvlv_tt_data);
3453 /* The packet was for this host, so it doesn't need to be re-routed */
3458 * batadv_send_tt_response() - send reply to tt request
3459 * @bat_priv: the bat priv with all the soft interface information
3460 * @tt_data: tt data containing the tt request information
3461 * @req_src: mac address of tt request sender
3462 * @req_dst: mac address of tt request recipient
3464 * Return: true if tt request reply was sent, false otherwise.
3466 static bool batadv_send_tt_response(struct batadv_priv *bat_priv,
3467 struct batadv_tvlv_tt_data *tt_data,
3468 u8 *req_src, u8 *req_dst)
3470 if (batadv_is_my_mac(bat_priv, req_dst))
3471 return batadv_send_my_tt_response(bat_priv, tt_data, req_src);
3472 return batadv_send_other_tt_response(bat_priv, tt_data, req_src,
3476 static void _batadv_tt_update_changes(struct batadv_priv *bat_priv,
3477 struct batadv_orig_node *orig_node,
3478 struct batadv_tvlv_tt_change *tt_change,
3479 u16 tt_num_changes, u8 ttvn)
3484 for (i = 0; i < tt_num_changes; i++) {
3485 if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) {
3486 roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM;
3487 batadv_tt_global_del(bat_priv, orig_node,
3488 (tt_change + i)->addr,
3489 ntohs((tt_change + i)->vid),
3490 "tt removed by changes",
3493 if (!batadv_tt_global_add(bat_priv, orig_node,
3494 (tt_change + i)->addr,
3495 ntohs((tt_change + i)->vid),
3496 (tt_change + i)->flags, ttvn))
3497 /* In case of problem while storing a
3498 * global_entry, we stop the updating
3499 * procedure without committing the
3500 * ttvn change. This will avoid to send
3501 * corrupted data on tt_request
3506 set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized);
3509 static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv,
3510 struct batadv_tvlv_tt_change *tt_change,
3511 u8 ttvn, u8 *resp_src,
3514 struct batadv_orig_node *orig_node;
3516 orig_node = batadv_orig_hash_find(bat_priv, resp_src);
3520 /* Purge the old table first.. */
3521 batadv_tt_global_del_orig(bat_priv, orig_node, -1,
3522 "Received full table");
3524 _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries,
3527 spin_lock_bh(&orig_node->tt_buff_lock);
3528 kfree(orig_node->tt_buff);
3529 orig_node->tt_buff_len = 0;
3530 orig_node->tt_buff = NULL;
3531 spin_unlock_bh(&orig_node->tt_buff_lock);
3533 atomic_set(&orig_node->last_ttvn, ttvn);
3537 batadv_orig_node_put(orig_node);
3540 static void batadv_tt_update_changes(struct batadv_priv *bat_priv,
3541 struct batadv_orig_node *orig_node,
3542 u16 tt_num_changes, u8 ttvn,
3543 struct batadv_tvlv_tt_change *tt_change)
3545 _batadv_tt_update_changes(bat_priv, orig_node, tt_change,
3546 tt_num_changes, ttvn);
3548 batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change,
3549 batadv_tt_len(tt_num_changes));
3550 atomic_set(&orig_node->last_ttvn, ttvn);
3554 * batadv_is_my_client() - check if a client is served by the local node
3555 * @bat_priv: the bat priv with all the soft interface information
3556 * @addr: the mac address of the client to check
3557 * @vid: VLAN identifier
3559 * Return: true if the client is served by this node, false otherwise.
3561 bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr,
3564 struct batadv_tt_local_entry *tt_local_entry;
3567 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
3568 if (!tt_local_entry)
3570 /* Check if the client has been logically deleted (but is kept for
3571 * consistency purpose)
3573 if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) ||
3574 (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM))
3579 batadv_tt_local_entry_put(tt_local_entry);
3584 * batadv_handle_tt_response() - process incoming tt reply
3585 * @bat_priv: the bat priv with all the soft interface information
3586 * @tt_data: tt data containing the tt request information
3587 * @resp_src: mac address of tt reply sender
3588 * @num_entries: number of tt change entries appended to the tt data
3590 static void batadv_handle_tt_response(struct batadv_priv *bat_priv,
3591 struct batadv_tvlv_tt_data *tt_data,
3592 u8 *resp_src, u16 num_entries)
3594 struct batadv_tt_req_node *node;
3595 struct hlist_node *safe;
3596 struct batadv_orig_node *orig_node = NULL;
3597 struct batadv_tvlv_tt_change *tt_change;
3598 u8 *tvlv_ptr = (u8 *)tt_data;
3601 batadv_dbg(BATADV_DBG_TT, bat_priv,
3602 "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
3603 resp_src, tt_data->ttvn, num_entries,
3604 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3606 orig_node = batadv_orig_hash_find(bat_priv, resp_src);
3610 spin_lock_bh(&orig_node->tt_lock);
3612 change_offset = sizeof(struct batadv_tvlv_tt_vlan_data);
3613 change_offset *= ntohs(tt_data->num_vlan);
3614 change_offset += sizeof(*tt_data);
3615 tvlv_ptr += change_offset;
3617 tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr;
3618 if (tt_data->flags & BATADV_TT_FULL_TABLE) {
3619 batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn,
3620 resp_src, num_entries);
3622 batadv_tt_update_changes(bat_priv, orig_node, num_entries,
3623 tt_data->ttvn, tt_change);
3626 /* Recalculate the CRC for this orig_node and store it */
3627 batadv_tt_global_update_crc(bat_priv, orig_node);
3629 spin_unlock_bh(&orig_node->tt_lock);
3631 /* Delete the tt_req_node from pending tt_requests list */
3632 spin_lock_bh(&bat_priv->tt.req_list_lock);
3633 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
3634 if (!batadv_compare_eth(node->addr, resp_src))
3636 hlist_del_init(&node->list);
3637 batadv_tt_req_node_put(node);
3640 spin_unlock_bh(&bat_priv->tt.req_list_lock);
3643 batadv_orig_node_put(orig_node);
3646 static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv)
3648 struct batadv_tt_roam_node *node, *safe;
3650 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3652 list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) {
3653 list_del(&node->list);
3654 kmem_cache_free(batadv_tt_roam_cache, node);
3657 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3660 static void batadv_tt_roam_purge(struct batadv_priv *bat_priv)
3662 struct batadv_tt_roam_node *node, *safe;
3664 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3665 list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) {
3666 if (!batadv_has_timed_out(node->first_time,
3667 BATADV_ROAMING_MAX_TIME))
3670 list_del(&node->list);
3671 kmem_cache_free(batadv_tt_roam_cache, node);
3673 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3677 * batadv_tt_check_roam_count() - check if a client has roamed too frequently
3678 * @bat_priv: the bat priv with all the soft interface information
3679 * @client: mac address of the roaming client
3681 * This function checks whether the client already reached the
3682 * maximum number of possible roaming phases. In this case the ROAMING_ADV
3685 * Return: true if the ROAMING_ADV can be sent, false otherwise
3687 static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client)
3689 struct batadv_tt_roam_node *tt_roam_node;
3692 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3693 /* The new tt_req will be issued only if I'm not waiting for a
3694 * reply from the same orig_node yet
3696 list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) {
3697 if (!batadv_compare_eth(tt_roam_node->addr, client))
3700 if (batadv_has_timed_out(tt_roam_node->first_time,
3701 BATADV_ROAMING_MAX_TIME))
3704 if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter))
3705 /* Sorry, you roamed too many times! */
3712 tt_roam_node = kmem_cache_alloc(batadv_tt_roam_cache,
3717 tt_roam_node->first_time = jiffies;
3718 atomic_set(&tt_roam_node->counter,
3719 BATADV_ROAMING_MAX_COUNT - 1);
3720 ether_addr_copy(tt_roam_node->addr, client);
3722 list_add(&tt_roam_node->list, &bat_priv->tt.roam_list);
3727 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3732 * batadv_send_roam_adv() - send a roaming advertisement message
3733 * @bat_priv: the bat priv with all the soft interface information
3734 * @client: mac address of the roaming client
3735 * @vid: VLAN identifier
3736 * @orig_node: message destination
3738 * Send a ROAMING_ADV message to the node which was previously serving this
3739 * client. This is done to inform the node that from now on all traffic destined
3740 * for this particular roamed client has to be forwarded to the sender of the
3743 static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client,
3745 struct batadv_orig_node *orig_node)
3747 struct batadv_hard_iface *primary_if;
3748 struct batadv_tvlv_roam_adv tvlv_roam;
3750 primary_if = batadv_primary_if_get_selected(bat_priv);
3754 /* before going on we have to check whether the client has
3755 * already roamed to us too many times
3757 if (!batadv_tt_check_roam_count(bat_priv, client))
3760 batadv_dbg(BATADV_DBG_TT, bat_priv,
3761 "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n",
3762 orig_node->orig, client, batadv_print_vid(vid));
3764 batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX);
3766 memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client));
3767 tvlv_roam.vid = htons(vid);
3769 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3770 orig_node->orig, BATADV_TVLV_ROAM, 1,
3771 &tvlv_roam, sizeof(tvlv_roam));
3775 batadv_hardif_put(primary_if);
3778 static void batadv_tt_purge(struct work_struct *work)
3780 struct delayed_work *delayed_work;
3781 struct batadv_priv_tt *priv_tt;
3782 struct batadv_priv *bat_priv;
3784 delayed_work = to_delayed_work(work);
3785 priv_tt = container_of(delayed_work, struct batadv_priv_tt, work);
3786 bat_priv = container_of(priv_tt, struct batadv_priv, tt);
3788 batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT);
3789 batadv_tt_global_purge(bat_priv);
3790 batadv_tt_req_purge(bat_priv);
3791 batadv_tt_roam_purge(bat_priv);
3793 queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
3794 msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
3798 * batadv_tt_free() - Free translation table of soft interface
3799 * @bat_priv: the bat priv with all the soft interface information
3801 void batadv_tt_free(struct batadv_priv *bat_priv)
3803 batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1);
3804 batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1);
3806 cancel_delayed_work_sync(&bat_priv->tt.work);
3808 batadv_tt_local_table_free(bat_priv);
3809 batadv_tt_global_table_free(bat_priv);
3810 batadv_tt_req_list_free(bat_priv);
3811 batadv_tt_changes_list_free(bat_priv);
3812 batadv_tt_roam_list_free(bat_priv);
3814 kfree(bat_priv->tt.last_changeset);
3818 * batadv_tt_local_set_flags() - set or unset the specified flags on the local
3819 * table and possibly count them in the TT size
3820 * @bat_priv: the bat priv with all the soft interface information
3821 * @flags: the flag to switch
3822 * @enable: whether to set or unset the flag
3823 * @count: whether to increase the TT size by the number of changed entries
3825 static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags,
3826 bool enable, bool count)
3828 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
3829 struct batadv_tt_common_entry *tt_common_entry;
3830 struct hlist_head *head;
3836 for (i = 0; i < hash->size; i++) {
3837 head = &hash->table[i];
3840 hlist_for_each_entry_rcu(tt_common_entry,
3843 if ((tt_common_entry->flags & flags) == flags)
3845 tt_common_entry->flags |= flags;
3847 if (!(tt_common_entry->flags & flags))
3849 tt_common_entry->flags &= ~flags;
3855 batadv_tt_local_size_inc(bat_priv,
3856 tt_common_entry->vid);
3862 /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */
3863 static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv)
3865 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
3866 struct batadv_tt_common_entry *tt_common;
3867 struct batadv_tt_local_entry *tt_local;
3868 struct hlist_node *node_tmp;
3869 struct hlist_head *head;
3870 spinlock_t *list_lock; /* protects write access to the hash lists */
3876 for (i = 0; i < hash->size; i++) {
3877 head = &hash->table[i];
3878 list_lock = &hash->list_locks[i];
3880 spin_lock_bh(list_lock);
3881 hlist_for_each_entry_safe(tt_common, node_tmp, head,
3883 if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING))
3886 batadv_dbg(BATADV_DBG_TT, bat_priv,
3887 "Deleting local tt entry (%pM, vid: %d): pending\n",
3889 batadv_print_vid(tt_common->vid));
3891 batadv_tt_local_size_dec(bat_priv, tt_common->vid);
3892 hlist_del_rcu(&tt_common->hash_entry);
3893 tt_local = container_of(tt_common,
3894 struct batadv_tt_local_entry,
3897 batadv_tt_local_entry_put(tt_local);
3899 spin_unlock_bh(list_lock);
3904 * batadv_tt_local_commit_changes_nolock() - commit all pending local tt changes
3905 * which have been queued in the time since the last commit
3906 * @bat_priv: the bat priv with all the soft interface information
3908 * Caller must hold tt->commit_lock.
3910 static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv)
3912 lockdep_assert_held(&bat_priv->tt.commit_lock);
3914 if (atomic_read(&bat_priv->tt.local_changes) < 1) {
3915 if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt))
3916 batadv_tt_tvlv_container_update(bat_priv);
3920 batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true);
3922 batadv_tt_local_purge_pending_clients(bat_priv);
3923 batadv_tt_local_update_crc(bat_priv);
3925 /* Increment the TTVN only once per OGM interval */
3926 atomic_inc(&bat_priv->tt.vn);
3927 batadv_dbg(BATADV_DBG_TT, bat_priv,
3928 "Local changes committed, updating to ttvn %u\n",
3929 (u8)atomic_read(&bat_priv->tt.vn));
3931 /* reset the sending counter */
3932 atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX);
3933 batadv_tt_tvlv_container_update(bat_priv);
3937 * batadv_tt_local_commit_changes() - commit all pending local tt changes which
3938 * have been queued in the time since the last commit
3939 * @bat_priv: the bat priv with all the soft interface information
3941 void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv)
3943 spin_lock_bh(&bat_priv->tt.commit_lock);
3944 batadv_tt_local_commit_changes_nolock(bat_priv);
3945 spin_unlock_bh(&bat_priv->tt.commit_lock);
3949 * batadv_is_ap_isolated() - Check if packet from upper layer should be dropped
3950 * @bat_priv: the bat priv with all the soft interface information
3951 * @src: source mac address of packet
3952 * @dst: destination mac address of packet
3953 * @vid: vlan id of packet
3955 * Return: true when src+dst(+vid) pair should be isolated, false otherwise
3957 bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst,
3960 struct batadv_tt_local_entry *tt_local_entry;
3961 struct batadv_tt_global_entry *tt_global_entry;
3962 struct batadv_softif_vlan *vlan;
3965 vlan = batadv_softif_vlan_get(bat_priv, vid);
3969 if (!atomic_read(&vlan->ap_isolation))
3972 tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid);
3973 if (!tt_local_entry)
3976 tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid);
3977 if (!tt_global_entry)
3978 goto local_entry_put;
3980 if (_batadv_is_ap_isolated(tt_local_entry, tt_global_entry))
3983 batadv_tt_global_entry_put(tt_global_entry);
3985 batadv_tt_local_entry_put(tt_local_entry);
3987 batadv_softif_vlan_put(vlan);
3992 * batadv_tt_update_orig() - update global translation table with new tt
3993 * information received via ogms
3994 * @bat_priv: the bat priv with all the soft interface information
3995 * @orig_node: the orig_node of the ogm
3996 * @tt_buff: pointer to the first tvlv VLAN entry
3997 * @tt_num_vlan: number of tvlv VLAN entries
3998 * @tt_change: pointer to the first entry in the TT buffer
3999 * @tt_num_changes: number of tt changes inside the tt buffer
4000 * @ttvn: translation table version number of this changeset
4002 static void batadv_tt_update_orig(struct batadv_priv *bat_priv,
4003 struct batadv_orig_node *orig_node,
4004 const void *tt_buff, u16 tt_num_vlan,
4005 struct batadv_tvlv_tt_change *tt_change,
4006 u16 tt_num_changes, u8 ttvn)
4008 u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn);
4009 struct batadv_tvlv_tt_vlan_data *tt_vlan;
4010 bool full_table = true;
4013 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff;
4014 has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT,
4015 &orig_node->capa_initialized);
4017 /* orig table not initialised AND first diff is in the OGM OR the ttvn
4018 * increased by one -> we can apply the attached changes
4020 if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) {
4021 /* the OGM could not contain the changes due to their size or
4022 * because they have already been sent BATADV_TT_OGM_APPEND_MAX
4024 * In this case send a tt request
4026 if (!tt_num_changes) {
4031 spin_lock_bh(&orig_node->tt_lock);
4033 batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes,
4036 /* Even if we received the precomputed crc with the OGM, we
4037 * prefer to recompute it to spot any possible inconsistency
4038 * in the global table
4040 batadv_tt_global_update_crc(bat_priv, orig_node);
4042 spin_unlock_bh(&orig_node->tt_lock);
4044 /* The ttvn alone is not enough to guarantee consistency
4045 * because a single value could represent different states
4046 * (due to the wrap around). Thus a node has to check whether
4047 * the resulting table (after applying the changes) is still
4048 * consistent or not. E.g. a node could disconnect while its
4049 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
4050 * checking the CRC value is mandatory to detect the
4053 if (!batadv_tt_global_check_crc(orig_node, tt_vlan,
4057 /* if we missed more than one change or our tables are not
4058 * in sync anymore -> request fresh tt data
4060 if (!has_tt_init || ttvn != orig_ttvn ||
4061 !batadv_tt_global_check_crc(orig_node, tt_vlan,
4064 batadv_dbg(BATADV_DBG_TT, bat_priv,
4065 "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n",
4066 orig_node->orig, ttvn, orig_ttvn,
4068 batadv_send_tt_request(bat_priv, orig_node, ttvn,
4069 tt_vlan, tt_num_vlan,
4077 * batadv_tt_global_client_is_roaming() - check if a client is marked as roaming
4078 * @bat_priv: the bat priv with all the soft interface information
4079 * @addr: the mac address of the client to check
4080 * @vid: VLAN identifier
4082 * Return: true if we know that the client has moved from its old originator
4083 * to another one. This entry is still kept for consistency purposes and will be
4084 * deleted later by a DEL or because of timeout
4086 bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv,
4087 u8 *addr, unsigned short vid)
4089 struct batadv_tt_global_entry *tt_global_entry;
4092 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
4093 if (!tt_global_entry)
4096 ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM;
4097 batadv_tt_global_entry_put(tt_global_entry);
4103 * batadv_tt_local_client_is_roaming() - tells whether the client is roaming
4104 * @bat_priv: the bat priv with all the soft interface information
4105 * @addr: the mac address of the local client to query
4106 * @vid: VLAN identifier
4108 * Return: true if the local client is known to be roaming (it is not served by
4109 * this node anymore) or not. If yes, the client is still present in the table
4110 * to keep the latter consistent with the node TTVN
4112 bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv,
4113 u8 *addr, unsigned short vid)
4115 struct batadv_tt_local_entry *tt_local_entry;
4118 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
4119 if (!tt_local_entry)
4122 ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM;
4123 batadv_tt_local_entry_put(tt_local_entry);
4129 * batadv_tt_add_temporary_global_entry() - Add temporary entry to global TT
4130 * @bat_priv: the bat priv with all the soft interface information
4131 * @orig_node: orig node which the temporary entry should be associated with
4132 * @addr: mac address of the client
4133 * @vid: VLAN id of the new temporary global translation table
4135 * Return: true when temporary tt entry could be added, false otherwise
4137 bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv,
4138 struct batadv_orig_node *orig_node,
4139 const unsigned char *addr,
4142 /* ignore loop detect macs, they are not supposed to be in the tt local
4145 if (batadv_bla_is_loopdetect_mac(addr))
4148 if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid,
4149 BATADV_TT_CLIENT_TEMP,
4150 atomic_read(&orig_node->last_ttvn)))
4153 batadv_dbg(BATADV_DBG_TT, bat_priv,
4154 "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n",
4155 addr, batadv_print_vid(vid), orig_node->orig);
4161 * batadv_tt_local_resize_to_mtu() - resize the local translation table fit the
4162 * maximum packet size that can be transported through the mesh
4163 * @soft_iface: netdev struct of the mesh interface
4165 * Remove entries older than 'timeout' and half timeout if more entries need
4168 void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface)
4170 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
4171 int packet_size_max = atomic_read(&bat_priv->packet_size_max);
4172 int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2;
4173 bool reduced = false;
4175 spin_lock_bh(&bat_priv->tt.commit_lock);
4178 table_size = batadv_tt_local_table_transmit_size(bat_priv);
4179 if (packet_size_max >= table_size)
4182 batadv_tt_local_purge(bat_priv, timeout);
4183 batadv_tt_local_purge_pending_clients(bat_priv);
4187 net_ratelimited_function(batadv_info, soft_iface,
4188 "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n",
4192 /* commit these changes immediately, to avoid synchronization problem
4196 batadv_tt_local_commit_changes_nolock(bat_priv);
4198 spin_unlock_bh(&bat_priv->tt.commit_lock);
4202 * batadv_tt_tvlv_ogm_handler_v1() - process incoming tt tvlv container
4203 * @bat_priv: the bat priv with all the soft interface information
4204 * @orig: the orig_node of the ogm
4205 * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
4206 * @tvlv_value: tvlv buffer containing the gateway data
4207 * @tvlv_value_len: tvlv buffer length
4209 static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,
4210 struct batadv_orig_node *orig,
4211 u8 flags, void *tvlv_value,
4214 struct batadv_tvlv_tt_vlan_data *tt_vlan;
4215 struct batadv_tvlv_tt_change *tt_change;
4216 struct batadv_tvlv_tt_data *tt_data;
4217 u16 num_entries, num_vlan;
4219 if (tvlv_value_len < sizeof(*tt_data))
4222 tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
4223 tvlv_value_len -= sizeof(*tt_data);
4225 num_vlan = ntohs(tt_data->num_vlan);
4227 if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan)
4230 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
4231 tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan);
4232 tvlv_value_len -= sizeof(*tt_vlan) * num_vlan;
4234 num_entries = batadv_tt_entries(tvlv_value_len);
4236 batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change,
4237 num_entries, tt_data->ttvn);
4241 * batadv_tt_tvlv_unicast_handler_v1() - process incoming (unicast) tt tvlv
4243 * @bat_priv: the bat priv with all the soft interface information
4244 * @src: mac address of tt tvlv sender
4245 * @dst: mac address of tt tvlv recipient
4246 * @tvlv_value: tvlv buffer containing the tt data
4247 * @tvlv_value_len: tvlv buffer length
4249 * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS
4252 static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
4257 struct batadv_tvlv_tt_data *tt_data;
4258 u16 tt_vlan_len, tt_num_entries;
4262 if (tvlv_value_len < sizeof(*tt_data))
4263 return NET_RX_SUCCESS;
4265 tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
4266 tvlv_value_len -= sizeof(*tt_data);
4268 tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data);
4269 tt_vlan_len *= ntohs(tt_data->num_vlan);
4271 if (tvlv_value_len < tt_vlan_len)
4272 return NET_RX_SUCCESS;
4274 tvlv_value_len -= tt_vlan_len;
4275 tt_num_entries = batadv_tt_entries(tvlv_value_len);
4277 switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) {
4278 case BATADV_TT_REQUEST:
4279 batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX);
4281 /* If this node cannot provide a TT response the tt_request is
4284 ret = batadv_send_tt_response(bat_priv, tt_data, src, dst);
4286 if (tt_data->flags & BATADV_TT_FULL_TABLE)
4291 batadv_dbg(BATADV_DBG_TT, bat_priv,
4292 "Routing TT_REQUEST to %pM [%c]\n",
4294 /* tvlv API will re-route the packet */
4298 case BATADV_TT_RESPONSE:
4299 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX);
4301 if (batadv_is_my_mac(bat_priv, dst)) {
4302 batadv_handle_tt_response(bat_priv, tt_data,
4303 src, tt_num_entries);
4304 return NET_RX_SUCCESS;
4307 if (tt_data->flags & BATADV_TT_FULL_TABLE)
4312 batadv_dbg(BATADV_DBG_TT, bat_priv,
4313 "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag);
4315 /* tvlv API will re-route the packet */
4319 return NET_RX_SUCCESS;
4323 * batadv_roam_tvlv_unicast_handler_v1() - process incoming tt roam tvlv
4325 * @bat_priv: the bat priv with all the soft interface information
4326 * @src: mac address of tt tvlv sender
4327 * @dst: mac address of tt tvlv recipient
4328 * @tvlv_value: tvlv buffer containing the tt data
4329 * @tvlv_value_len: tvlv buffer length
4331 * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS
4334 static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
4339 struct batadv_tvlv_roam_adv *roaming_adv;
4340 struct batadv_orig_node *orig_node = NULL;
4342 /* If this node is not the intended recipient of the
4343 * roaming advertisement the packet is forwarded
4344 * (the tvlv API will re-route the packet).
4346 if (!batadv_is_my_mac(bat_priv, dst))
4349 if (tvlv_value_len < sizeof(*roaming_adv))
4352 orig_node = batadv_orig_hash_find(bat_priv, src);
4356 batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX);
4357 roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value;
4359 batadv_dbg(BATADV_DBG_TT, bat_priv,
4360 "Received ROAMING_ADV from %pM (client %pM)\n",
4361 src, roaming_adv->client);
4363 batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client,
4364 ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM,
4365 atomic_read(&orig_node->last_ttvn) + 1);
4369 batadv_orig_node_put(orig_node);
4370 return NET_RX_SUCCESS;
4374 * batadv_tt_init() - initialise the translation table internals
4375 * @bat_priv: the bat priv with all the soft interface information
4377 * Return: 0 on success or negative error number in case of failure.
4379 int batadv_tt_init(struct batadv_priv *bat_priv)
4383 /* synchronized flags must be remote */
4384 BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK));
4386 ret = batadv_tt_local_init(bat_priv);
4390 ret = batadv_tt_global_init(bat_priv);
4394 batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1,
4395 batadv_tt_tvlv_unicast_handler_v1,
4396 BATADV_TVLV_TT, 1, BATADV_NO_FLAGS);
4398 batadv_tvlv_handler_register(bat_priv, NULL,
4399 batadv_roam_tvlv_unicast_handler_v1,
4400 BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS);
4402 INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge);
4403 queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
4404 msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
4410 * batadv_tt_global_is_isolated() - check if a client is marked as isolated
4411 * @bat_priv: the bat priv with all the soft interface information
4412 * @addr: the mac address of the client
4413 * @vid: the identifier of the VLAN where this client is connected
4415 * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false
4418 bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv,
4419 const u8 *addr, unsigned short vid)
4421 struct batadv_tt_global_entry *tt;
4424 tt = batadv_tt_global_hash_find(bat_priv, addr, vid);
4428 ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA;
4430 batadv_tt_global_entry_put(tt);
4436 * batadv_tt_cache_init() - Initialize tt memory object cache
4438 * Return: 0 on success or negative error number in case of failure.
4440 int __init batadv_tt_cache_init(void)
4442 size_t tl_size = sizeof(struct batadv_tt_local_entry);
4443 size_t tg_size = sizeof(struct batadv_tt_global_entry);
4444 size_t tt_orig_size = sizeof(struct batadv_tt_orig_list_entry);
4445 size_t tt_change_size = sizeof(struct batadv_tt_change_node);
4446 size_t tt_req_size = sizeof(struct batadv_tt_req_node);
4447 size_t tt_roam_size = sizeof(struct batadv_tt_roam_node);
4449 batadv_tl_cache = kmem_cache_create("batadv_tl_cache", tl_size, 0,
4450 SLAB_HWCACHE_ALIGN, NULL);
4451 if (!batadv_tl_cache)
4454 batadv_tg_cache = kmem_cache_create("batadv_tg_cache", tg_size, 0,
4455 SLAB_HWCACHE_ALIGN, NULL);
4456 if (!batadv_tg_cache)
4457 goto err_tt_tl_destroy;
4459 batadv_tt_orig_cache = kmem_cache_create("batadv_tt_orig_cache",
4461 SLAB_HWCACHE_ALIGN, NULL);
4462 if (!batadv_tt_orig_cache)
4463 goto err_tt_tg_destroy;
4465 batadv_tt_change_cache = kmem_cache_create("batadv_tt_change_cache",
4467 SLAB_HWCACHE_ALIGN, NULL);
4468 if (!batadv_tt_change_cache)
4469 goto err_tt_orig_destroy;
4471 batadv_tt_req_cache = kmem_cache_create("batadv_tt_req_cache",
4473 SLAB_HWCACHE_ALIGN, NULL);
4474 if (!batadv_tt_req_cache)
4475 goto err_tt_change_destroy;
4477 batadv_tt_roam_cache = kmem_cache_create("batadv_tt_roam_cache",
4479 SLAB_HWCACHE_ALIGN, NULL);
4480 if (!batadv_tt_roam_cache)
4481 goto err_tt_req_destroy;
4486 kmem_cache_destroy(batadv_tt_req_cache);
4487 batadv_tt_req_cache = NULL;
4488 err_tt_change_destroy:
4489 kmem_cache_destroy(batadv_tt_change_cache);
4490 batadv_tt_change_cache = NULL;
4491 err_tt_orig_destroy:
4492 kmem_cache_destroy(batadv_tt_orig_cache);
4493 batadv_tt_orig_cache = NULL;
4495 kmem_cache_destroy(batadv_tg_cache);
4496 batadv_tg_cache = NULL;
4498 kmem_cache_destroy(batadv_tl_cache);
4499 batadv_tl_cache = NULL;
4505 * batadv_tt_cache_destroy() - Destroy tt memory object cache
4507 void batadv_tt_cache_destroy(void)
4509 kmem_cache_destroy(batadv_tl_cache);
4510 kmem_cache_destroy(batadv_tg_cache);
4511 kmem_cache_destroy(batadv_tt_orig_cache);
4512 kmem_cache_destroy(batadv_tt_change_cache);
4513 kmem_cache_destroy(batadv_tt_req_cache);
4514 kmem_cache_destroy(batadv_tt_roam_cache);