1 /* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich, Antonio Quartulli
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 #include "translation-table.h"
20 #include "soft-interface.h"
21 #include "hard-interface.h"
24 #include "originator.h"
26 #include "bridge_loop_avoidance.h"
27 #include "multicast.h"
29 #include <linux/crc32c.h>
32 static struct lock_class_key batadv_tt_local_hash_lock_class_key;
33 static struct lock_class_key batadv_tt_global_hash_lock_class_key;
35 static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client,
37 struct batadv_orig_node *orig_node);
38 static void batadv_tt_purge(struct work_struct *work);
40 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry);
41 static void batadv_tt_global_del(struct batadv_priv *bat_priv,
42 struct batadv_orig_node *orig_node,
43 const unsigned char *addr,
44 unsigned short vid, const char *message,
47 /* returns 1 if they are the same mac addr */
48 static int batadv_compare_tt(const struct hlist_node *node, const void *data2)
50 const void *data1 = container_of(node, struct batadv_tt_common_entry,
53 return batadv_compare_eth(data1, data2);
57 * batadv_choose_tt - return the index of the tt entry in the hash table
58 * @data: pointer to the tt_common_entry object to map
59 * @size: the size of the hash table
61 * Returns the hash index where the object represented by 'data' should be
64 static inline uint32_t batadv_choose_tt(const void *data, uint32_t size)
66 struct batadv_tt_common_entry *tt;
69 tt = (struct batadv_tt_common_entry *)data;
70 hash = batadv_hash_bytes(hash, &tt->addr, ETH_ALEN);
71 hash = batadv_hash_bytes(hash, &tt->vid, sizeof(tt->vid));
81 * batadv_tt_hash_find - look for a client in the given hash table
82 * @hash: the hash table to search
83 * @addr: the mac address of the client to look for
84 * @vid: VLAN identifier
86 * Returns a pointer to the tt_common struct belonging to the searched client if
87 * found, NULL otherwise.
89 static struct batadv_tt_common_entry *
90 batadv_tt_hash_find(struct batadv_hashtable *hash, const uint8_t *addr,
93 struct hlist_head *head;
94 struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL;
100 ether_addr_copy(to_search.addr, addr);
103 index = batadv_choose_tt(&to_search, hash->size);
104 head = &hash->table[index];
107 hlist_for_each_entry_rcu(tt, head, hash_entry) {
108 if (!batadv_compare_eth(tt, addr))
114 if (!atomic_inc_not_zero(&tt->refcount))
126 * batadv_tt_local_hash_find - search the local table for a given client
127 * @bat_priv: the bat priv with all the soft interface information
128 * @addr: the mac address of the client to look for
129 * @vid: VLAN identifier
131 * Returns a pointer to the corresponding tt_local_entry struct if the client is
132 * found, NULL otherwise.
134 static struct batadv_tt_local_entry *
135 batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr,
138 struct batadv_tt_common_entry *tt_common_entry;
139 struct batadv_tt_local_entry *tt_local_entry = NULL;
141 tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr,
144 tt_local_entry = container_of(tt_common_entry,
145 struct batadv_tt_local_entry,
147 return tt_local_entry;
151 * batadv_tt_global_hash_find - search the global table for a given client
152 * @bat_priv: the bat priv with all the soft interface information
153 * @addr: the mac address of the client to look for
154 * @vid: VLAN identifier
156 * Returns a pointer to the corresponding tt_global_entry struct if the client
157 * is found, NULL otherwise.
159 static struct batadv_tt_global_entry *
160 batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr,
163 struct batadv_tt_common_entry *tt_common_entry;
164 struct batadv_tt_global_entry *tt_global_entry = NULL;
166 tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr,
169 tt_global_entry = container_of(tt_common_entry,
170 struct batadv_tt_global_entry,
172 return tt_global_entry;
176 batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry)
178 if (atomic_dec_and_test(&tt_local_entry->common.refcount))
179 kfree_rcu(tt_local_entry, common.rcu);
183 * batadv_tt_global_entry_free_ref - decrement the refcounter for a
184 * tt_global_entry and possibly free it
185 * @tt_global_entry: the object to free
188 batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry)
190 if (atomic_dec_and_test(&tt_global_entry->common.refcount)) {
191 batadv_tt_global_del_orig_list(tt_global_entry);
192 kfree_rcu(tt_global_entry, common.rcu);
197 * batadv_tt_global_hash_count - count the number of orig entries
198 * @hash: hash table containing the tt entries
199 * @addr: the mac address of the client to count entries for
200 * @vid: VLAN identifier
202 * Return the number of originators advertising the given address/data
203 * (excluding ourself).
205 int batadv_tt_global_hash_count(struct batadv_priv *bat_priv,
206 const uint8_t *addr, unsigned short vid)
208 struct batadv_tt_global_entry *tt_global_entry;
211 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
212 if (!tt_global_entry)
215 count = atomic_read(&tt_global_entry->orig_list_count);
216 batadv_tt_global_entry_free_ref(tt_global_entry);
221 static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu)
223 struct batadv_tt_orig_list_entry *orig_entry;
225 orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu);
227 /* We are in an rcu callback here, therefore we cannot use
228 * batadv_orig_node_free_ref() and its call_rcu():
229 * An rcu_barrier() wouldn't wait for that to finish
231 batadv_orig_node_free_ref_now(orig_entry->orig_node);
236 * batadv_tt_local_size_mod - change the size by v of the local table identified
238 * @bat_priv: the bat priv with all the soft interface information
239 * @vid: the VLAN identifier of the sub-table to change
240 * @v: the amount to sum to the local table size
242 static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv,
243 unsigned short vid, int v)
245 struct batadv_softif_vlan *vlan;
247 vlan = batadv_softif_vlan_get(bat_priv, vid);
251 atomic_add(v, &vlan->tt.num_entries);
253 batadv_softif_vlan_free_ref(vlan);
257 * batadv_tt_local_size_inc - increase by one the local table size for the given
259 * @bat_priv: the bat priv with all the soft interface information
260 * @vid: the VLAN identifier
262 static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv,
265 batadv_tt_local_size_mod(bat_priv, vid, 1);
269 * batadv_tt_local_size_dec - decrease by one the local table size for the given
271 * @bat_priv: the bat priv with all the soft interface information
272 * @vid: the VLAN identifier
274 static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv,
277 batadv_tt_local_size_mod(bat_priv, vid, -1);
281 * batadv_tt_global_size_mod - change the size by v of the local table
283 * @bat_priv: the bat priv with all the soft interface information
284 * @vid: the VLAN identifier
285 * @v: the amount to sum to the global table size
287 static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node,
288 unsigned short vid, int v)
290 struct batadv_orig_node_vlan *vlan;
292 vlan = batadv_orig_node_vlan_new(orig_node, vid);
296 if (atomic_add_return(v, &vlan->tt.num_entries) == 0) {
297 spin_lock_bh(&orig_node->vlan_list_lock);
298 list_del_rcu(&vlan->list);
299 spin_unlock_bh(&orig_node->vlan_list_lock);
300 batadv_orig_node_vlan_free_ref(vlan);
303 batadv_orig_node_vlan_free_ref(vlan);
307 * batadv_tt_global_size_inc - increase by one the global table size for the
309 * @orig_node: the originator which global table size has to be decreased
310 * @vid: the vlan identifier
312 static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node,
315 batadv_tt_global_size_mod(orig_node, vid, 1);
319 * batadv_tt_global_size_dec - decrease by one the global table size for the
321 * @orig_node: the originator which global table size has to be decreased
322 * @vid: the vlan identifier
324 static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node,
327 batadv_tt_global_size_mod(orig_node, vid, -1);
331 batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry)
333 if (!atomic_dec_and_test(&orig_entry->refcount))
336 call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu);
340 * batadv_tt_local_event - store a local TT event (ADD/DEL)
341 * @bat_priv: the bat priv with all the soft interface information
342 * @tt_local_entry: the TT entry involved in the event
343 * @event_flags: flags to store in the event structure
345 static void batadv_tt_local_event(struct batadv_priv *bat_priv,
346 struct batadv_tt_local_entry *tt_local_entry,
349 struct batadv_tt_change_node *tt_change_node, *entry, *safe;
350 struct batadv_tt_common_entry *common = &tt_local_entry->common;
351 uint8_t flags = common->flags | event_flags;
352 bool event_removed = false;
353 bool del_op_requested, del_op_entry;
355 tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC);
359 tt_change_node->change.flags = flags;
360 memset(tt_change_node->change.reserved, 0,
361 sizeof(tt_change_node->change.reserved));
362 ether_addr_copy(tt_change_node->change.addr, common->addr);
363 tt_change_node->change.vid = htons(common->vid);
365 del_op_requested = flags & BATADV_TT_CLIENT_DEL;
367 /* check for ADD+DEL or DEL+ADD events */
368 spin_lock_bh(&bat_priv->tt.changes_list_lock);
369 list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
371 if (!batadv_compare_eth(entry->change.addr, common->addr))
374 /* DEL+ADD in the same orig interval have no effect and can be
375 * removed to avoid silly behaviour on the receiver side. The
376 * other way around (ADD+DEL) can happen in case of roaming of
377 * a client still in the NEW state. Roaming of NEW clients is
378 * now possible due to automatically recognition of "temporary"
381 del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL;
382 if (!del_op_requested && del_op_entry)
384 if (del_op_requested && !del_op_entry)
387 /* this is a second add in the same originator interval. It
388 * means that flags have been changed: update them!
390 if (!del_op_requested && !del_op_entry)
391 entry->change.flags = flags;
395 list_del(&entry->list);
397 kfree(tt_change_node);
398 event_removed = true;
402 /* track the change in the OGMinterval list */
403 list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list);
406 spin_unlock_bh(&bat_priv->tt.changes_list_lock);
409 atomic_dec(&bat_priv->tt.local_changes);
411 atomic_inc(&bat_priv->tt.local_changes);
415 * batadv_tt_len - compute length in bytes of given number of tt changes
416 * @changes_num: number of tt changes
418 * Returns computed length in bytes.
420 static int batadv_tt_len(int changes_num)
422 return changes_num * sizeof(struct batadv_tvlv_tt_change);
426 * batadv_tt_entries - compute the number of entries fitting in tt_len bytes
427 * @tt_len: available space
429 * Returns the number of entries.
431 static uint16_t batadv_tt_entries(uint16_t tt_len)
433 return tt_len / batadv_tt_len(1);
437 * batadv_tt_local_table_transmit_size - calculates the local translation table
438 * size when transmitted over the air
439 * @bat_priv: the bat priv with all the soft interface information
441 * Returns local translation table size in bytes.
443 static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv)
445 uint16_t num_vlan = 0, tt_local_entries = 0;
446 struct batadv_softif_vlan *vlan;
450 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
452 tt_local_entries += atomic_read(&vlan->tt.num_entries);
456 /* header size of tvlv encapsulated tt response payload */
457 hdr_size = sizeof(struct batadv_unicast_tvlv_packet);
458 hdr_size += sizeof(struct batadv_tvlv_hdr);
459 hdr_size += sizeof(struct batadv_tvlv_tt_data);
460 hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data);
462 return hdr_size + batadv_tt_len(tt_local_entries);
465 static int batadv_tt_local_init(struct batadv_priv *bat_priv)
467 if (bat_priv->tt.local_hash)
470 bat_priv->tt.local_hash = batadv_hash_new(1024);
472 if (!bat_priv->tt.local_hash)
475 batadv_hash_set_lock_class(bat_priv->tt.local_hash,
476 &batadv_tt_local_hash_lock_class_key);
481 static void batadv_tt_global_free(struct batadv_priv *bat_priv,
482 struct batadv_tt_global_entry *tt_global,
485 batadv_dbg(BATADV_DBG_TT, bat_priv,
486 "Deleting global tt entry %pM (vid: %d): %s\n",
487 tt_global->common.addr,
488 BATADV_PRINT_VID(tt_global->common.vid), message);
490 batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt,
491 batadv_choose_tt, &tt_global->common);
492 batadv_tt_global_entry_free_ref(tt_global);
496 * batadv_tt_local_add - add a new client to the local table or update an
498 * @soft_iface: netdev struct of the mesh interface
499 * @addr: the mac address of the client to add
500 * @vid: VLAN identifier
501 * @ifindex: index of the interface where the client is connected to (useful to
502 * identify wireless clients)
503 * @mark: the value contained in the skb->mark field of the received packet (if
506 * Returns true if the client was successfully added, false otherwise.
508 bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr,
509 unsigned short vid, int ifindex, uint32_t mark)
511 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
512 struct batadv_tt_local_entry *tt_local;
513 struct batadv_tt_global_entry *tt_global = NULL;
514 struct batadv_softif_vlan *vlan;
515 struct net_device *in_dev = NULL;
516 struct hlist_head *head;
517 struct batadv_tt_orig_list_entry *orig_entry;
518 int hash_added, table_size, packet_size_max;
519 bool ret = false, roamed_back = false;
520 uint8_t remote_flags;
523 if (ifindex != BATADV_NULL_IFINDEX)
524 in_dev = dev_get_by_index(&init_net, ifindex);
526 tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid);
528 if (!is_multicast_ether_addr(addr))
529 tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid);
532 tt_local->last_seen = jiffies;
533 if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) {
534 batadv_dbg(BATADV_DBG_TT, bat_priv,
535 "Re-adding pending client %pM (vid: %d)\n",
536 addr, BATADV_PRINT_VID(vid));
537 /* whatever the reason why the PENDING flag was set,
538 * this is a client which was enqueued to be removed in
539 * this orig_interval. Since it popped up again, the
540 * flag can be reset like it was never enqueued
542 tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING;
546 if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) {
547 batadv_dbg(BATADV_DBG_TT, bat_priv,
548 "Roaming client %pM (vid: %d) came back to its original location\n",
549 addr, BATADV_PRINT_VID(vid));
550 /* the ROAM flag is set because this client roamed away
551 * and the node got a roaming_advertisement message. Now
552 * that the client popped up again at its original
553 * location such flag can be unset
555 tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM;
561 /* Ignore the client if we cannot send it in a full table response. */
562 table_size = batadv_tt_local_table_transmit_size(bat_priv);
563 table_size += batadv_tt_len(1);
564 packet_size_max = atomic_read(&bat_priv->packet_size_max);
565 if (table_size > packet_size_max) {
566 net_ratelimited_function(batadv_info, soft_iface,
567 "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n",
568 table_size, packet_size_max, addr);
572 tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC);
576 /* increase the refcounter of the related vlan */
577 vlan = batadv_softif_vlan_get(bat_priv, vid);
579 batadv_dbg(BATADV_DBG_TT, bat_priv,
580 "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n",
581 addr, BATADV_PRINT_VID(vid),
582 (uint8_t)atomic_read(&bat_priv->tt.vn));
584 ether_addr_copy(tt_local->common.addr, addr);
585 /* The local entry has to be marked as NEW to avoid to send it in
586 * a full table response going out before the next ttvn increment
587 * (consistency check)
589 tt_local->common.flags = BATADV_TT_CLIENT_NEW;
590 tt_local->common.vid = vid;
591 if (batadv_is_wifi_netdev(in_dev))
592 tt_local->common.flags |= BATADV_TT_CLIENT_WIFI;
593 atomic_set(&tt_local->common.refcount, 2);
594 tt_local->last_seen = jiffies;
595 tt_local->common.added_at = tt_local->last_seen;
597 /* the batman interface mac and multicast addresses should never be
600 if (batadv_compare_eth(addr, soft_iface->dev_addr) ||
601 is_multicast_ether_addr(addr))
602 tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE;
604 hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt,
605 batadv_choose_tt, &tt_local->common,
606 &tt_local->common.hash_entry);
608 if (unlikely(hash_added != 0)) {
609 /* remove the reference for the hash */
610 batadv_tt_local_entry_free_ref(tt_local);
611 batadv_softif_vlan_free_ref(vlan);
616 batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS);
619 /* Check whether it is a roaming, but don't do anything if the roaming
620 * process has already been handled
622 if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) {
623 /* These node are probably going to update their tt table */
624 head = &tt_global->orig_list;
626 hlist_for_each_entry_rcu(orig_entry, head, list) {
627 batadv_send_roam_adv(bat_priv, tt_global->common.addr,
628 tt_global->common.vid,
629 orig_entry->orig_node);
633 batadv_tt_global_free(bat_priv, tt_global,
637 /* The global entry has to be marked as ROAMING and
638 * has to be kept for consistency purpose
640 tt_global->common.flags |= BATADV_TT_CLIENT_ROAM;
641 tt_global->roam_at = jiffies;
645 /* store the current remote flags before altering them. This helps
646 * understanding is flags are changing or not
648 remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK;
650 if (batadv_is_wifi_netdev(in_dev))
651 tt_local->common.flags |= BATADV_TT_CLIENT_WIFI;
653 tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI;
655 /* check the mark in the skb: if it's equal to the configured
656 * isolation_mark, it means the packet is coming from an isolated
659 match_mark = (mark & bat_priv->isolation_mark_mask);
660 if (bat_priv->isolation_mark_mask &&
661 match_mark == bat_priv->isolation_mark)
662 tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA;
664 tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA;
666 /* if any "dynamic" flag has been modified, resend an ADD event for this
667 * entry so that all the nodes can get the new flags
669 if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK))
670 batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS);
677 batadv_tt_local_entry_free_ref(tt_local);
679 batadv_tt_global_entry_free_ref(tt_global);
684 * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send
685 * within a TT Response directed to another node
686 * @orig_node: originator for which the TT data has to be prepared
687 * @tt_data: uninitialised pointer to the address of the TVLV buffer
688 * @tt_change: uninitialised pointer to the address of the area where the TT
689 * changed can be stored
690 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
691 * function reserves the amount of space needed to send the entire global TT
692 * table. In case of success the value is updated with the real amount of
695 * Allocate the needed amount of memory for the entire TT TVLV and write its
696 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
697 * objects, one per active VLAN served by the originator node.
699 * Return the size of the allocated buffer or 0 in case of failure.
702 batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node,
703 struct batadv_tvlv_tt_data **tt_data,
704 struct batadv_tvlv_tt_change **tt_change,
707 uint16_t num_vlan = 0, num_entries = 0, change_offset, tvlv_len;
708 struct batadv_tvlv_tt_vlan_data *tt_vlan;
709 struct batadv_orig_node_vlan *vlan;
710 uint8_t *tt_change_ptr;
713 list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
715 num_entries += atomic_read(&vlan->tt.num_entries);
718 change_offset = sizeof(**tt_data);
719 change_offset += num_vlan * sizeof(*tt_vlan);
721 /* if tt_len is negative, allocate the space needed by the full table */
723 *tt_len = batadv_tt_len(num_entries);
726 tvlv_len += change_offset;
728 *tt_data = kmalloc(tvlv_len, GFP_ATOMIC);
734 (*tt_data)->flags = BATADV_NO_FLAGS;
735 (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn);
736 (*tt_data)->num_vlan = htons(num_vlan);
738 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1);
739 list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
740 tt_vlan->vid = htons(vlan->vid);
741 tt_vlan->crc = htonl(vlan->tt.crc);
746 tt_change_ptr = (uint8_t *)*tt_data + change_offset;
747 *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
755 * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this
757 * @bat_priv: the bat priv with all the soft interface information
758 * @tt_data: uninitialised pointer to the address of the TVLV buffer
759 * @tt_change: uninitialised pointer to the address of the area where the TT
760 * changes can be stored
761 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
762 * function reserves the amount of space needed to send the entire local TT
763 * table. In case of success the value is updated with the real amount of
766 * Allocate the needed amount of memory for the entire TT TVLV and write its
767 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
768 * objects, one per active VLAN.
770 * Return the size of the allocated buffer or 0 in case of failure.
773 batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,
774 struct batadv_tvlv_tt_data **tt_data,
775 struct batadv_tvlv_tt_change **tt_change,
778 struct batadv_tvlv_tt_vlan_data *tt_vlan;
779 struct batadv_softif_vlan *vlan;
780 uint16_t num_vlan = 0, num_entries = 0, tvlv_len;
781 uint8_t *tt_change_ptr;
785 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
787 num_entries += atomic_read(&vlan->tt.num_entries);
790 change_offset = sizeof(**tt_data);
791 change_offset += num_vlan * sizeof(*tt_vlan);
793 /* if tt_len is negative, allocate the space needed by the full table */
795 *tt_len = batadv_tt_len(num_entries);
798 tvlv_len += change_offset;
800 *tt_data = kmalloc(tvlv_len, GFP_ATOMIC);
806 (*tt_data)->flags = BATADV_NO_FLAGS;
807 (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn);
808 (*tt_data)->num_vlan = htons(num_vlan);
810 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1);
811 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
812 tt_vlan->vid = htons(vlan->vid);
813 tt_vlan->crc = htonl(vlan->tt.crc);
818 tt_change_ptr = (uint8_t *)*tt_data + change_offset;
819 *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
827 * batadv_tt_tvlv_container_update - update the translation table tvlv container
828 * after local tt changes have been committed
829 * @bat_priv: the bat priv with all the soft interface information
831 static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv)
833 struct batadv_tt_change_node *entry, *safe;
834 struct batadv_tvlv_tt_data *tt_data;
835 struct batadv_tvlv_tt_change *tt_change;
836 int tt_diff_len, tt_change_len = 0;
837 int tt_diff_entries_num = 0, tt_diff_entries_count = 0;
840 tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes);
841 tt_diff_len = batadv_tt_len(tt_diff_entries_num);
843 /* if we have too many changes for one packet don't send any
844 * and wait for the tt table request which will be fragmented
846 if (tt_diff_len > bat_priv->soft_iface->mtu)
849 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data,
850 &tt_change, &tt_diff_len);
854 tt_data->flags = BATADV_TT_OGM_DIFF;
856 if (tt_diff_len == 0)
857 goto container_register;
859 spin_lock_bh(&bat_priv->tt.changes_list_lock);
860 atomic_set(&bat_priv->tt.local_changes, 0);
862 list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
864 if (tt_diff_entries_count < tt_diff_entries_num) {
865 memcpy(tt_change + tt_diff_entries_count,
867 sizeof(struct batadv_tvlv_tt_change));
868 tt_diff_entries_count++;
870 list_del(&entry->list);
873 spin_unlock_bh(&bat_priv->tt.changes_list_lock);
875 /* Keep the buffer for possible tt_request */
876 spin_lock_bh(&bat_priv->tt.last_changeset_lock);
877 kfree(bat_priv->tt.last_changeset);
878 bat_priv->tt.last_changeset_len = 0;
879 bat_priv->tt.last_changeset = NULL;
880 tt_change_len = batadv_tt_len(tt_diff_entries_count);
881 /* check whether this new OGM has no changes due to size problems */
882 if (tt_diff_entries_count > 0) {
883 /* if kmalloc() fails we will reply with the full table
884 * instead of providing the diff
886 bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC);
887 if (bat_priv->tt.last_changeset) {
888 memcpy(bat_priv->tt.last_changeset,
889 tt_change, tt_change_len);
890 bat_priv->tt.last_changeset_len = tt_diff_len;
893 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
896 batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data,
901 int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset)
903 struct net_device *net_dev = (struct net_device *)seq->private;
904 struct batadv_priv *bat_priv = netdev_priv(net_dev);
905 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
906 struct batadv_tt_common_entry *tt_common_entry;
907 struct batadv_tt_local_entry *tt_local;
908 struct batadv_hard_iface *primary_if;
909 struct batadv_softif_vlan *vlan;
910 struct hlist_head *head;
915 unsigned long last_seen_jiffies;
917 uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE;
919 primary_if = batadv_seq_print_text_primary_if_get(seq);
924 "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n",
925 net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn));
926 seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID",
927 "Flags", "Last seen", "CRC");
929 for (i = 0; i < hash->size; i++) {
930 head = &hash->table[i];
933 hlist_for_each_entry_rcu(tt_common_entry,
935 tt_local = container_of(tt_common_entry,
936 struct batadv_tt_local_entry,
938 vid = tt_common_entry->vid;
939 last_seen_jiffies = jiffies - tt_local->last_seen;
940 last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
941 last_seen_secs = last_seen_msecs / 1000;
942 last_seen_msecs = last_seen_msecs % 1000;
944 no_purge = tt_common_entry->flags & np_flag;
946 vlan = batadv_softif_vlan_get(bat_priv, vid);
948 seq_printf(seq, "Cannot retrieve VLAN %d\n",
949 BATADV_PRINT_VID(vid));
954 " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n",
955 tt_common_entry->addr,
956 BATADV_PRINT_VID(tt_common_entry->vid),
957 (tt_common_entry->flags &
958 BATADV_TT_CLIENT_ROAM ? 'R' : '.'),
959 no_purge ? 'P' : '.',
960 (tt_common_entry->flags &
961 BATADV_TT_CLIENT_NEW ? 'N' : '.'),
962 (tt_common_entry->flags &
963 BATADV_TT_CLIENT_PENDING ? 'X' : '.'),
964 (tt_common_entry->flags &
965 BATADV_TT_CLIENT_WIFI ? 'W' : '.'),
966 (tt_common_entry->flags &
967 BATADV_TT_CLIENT_ISOLA ? 'I' : '.'),
968 no_purge ? 0 : last_seen_secs,
969 no_purge ? 0 : last_seen_msecs,
972 batadv_softif_vlan_free_ref(vlan);
978 batadv_hardif_free_ref(primary_if);
983 batadv_tt_local_set_pending(struct batadv_priv *bat_priv,
984 struct batadv_tt_local_entry *tt_local_entry,
985 uint16_t flags, const char *message)
987 batadv_tt_local_event(bat_priv, tt_local_entry, flags);
989 /* The local client has to be marked as "pending to be removed" but has
990 * to be kept in the table in order to send it in a full table
991 * response issued before the net ttvn increment (consistency check)
993 tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING;
995 batadv_dbg(BATADV_DBG_TT, bat_priv,
996 "Local tt entry (%pM, vid: %d) pending to be removed: %s\n",
997 tt_local_entry->common.addr,
998 BATADV_PRINT_VID(tt_local_entry->common.vid), message);
1002 * batadv_tt_local_remove - logically remove an entry from the local table
1003 * @bat_priv: the bat priv with all the soft interface information
1004 * @addr: the MAC address of the client to remove
1005 * @vid: VLAN identifier
1006 * @message: message to append to the log on deletion
1007 * @roaming: true if the deletion is due to a roaming event
1009 * Returns the flags assigned to the local entry before being deleted
1011 uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv,
1012 const uint8_t *addr, unsigned short vid,
1013 const char *message, bool roaming)
1015 struct batadv_tt_local_entry *tt_local_entry;
1016 uint16_t flags, curr_flags = BATADV_NO_FLAGS;
1017 struct batadv_softif_vlan *vlan;
1019 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
1020 if (!tt_local_entry)
1023 curr_flags = tt_local_entry->common.flags;
1025 flags = BATADV_TT_CLIENT_DEL;
1026 /* if this global entry addition is due to a roaming, the node has to
1027 * mark the local entry as "roamed" in order to correctly reroute
1031 flags |= BATADV_TT_CLIENT_ROAM;
1032 /* mark the local client as ROAMed */
1033 tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM;
1036 if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) {
1037 batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags,
1041 /* if this client has been added right now, it is possible to
1042 * immediately purge it
1044 batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL);
1045 hlist_del_rcu(&tt_local_entry->common.hash_entry);
1046 batadv_tt_local_entry_free_ref(tt_local_entry);
1048 /* decrease the reference held for this vlan */
1049 vlan = batadv_softif_vlan_get(bat_priv, vid);
1050 batadv_softif_vlan_free_ref(vlan);
1051 batadv_softif_vlan_free_ref(vlan);
1055 batadv_tt_local_entry_free_ref(tt_local_entry);
1061 * batadv_tt_local_purge_list - purge inactive tt local entries
1062 * @bat_priv: the bat priv with all the soft interface information
1063 * @head: pointer to the list containing the local tt entries
1064 * @timeout: parameter deciding whether a given tt local entry is considered
1067 static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv,
1068 struct hlist_head *head,
1071 struct batadv_tt_local_entry *tt_local_entry;
1072 struct batadv_tt_common_entry *tt_common_entry;
1073 struct hlist_node *node_tmp;
1075 hlist_for_each_entry_safe(tt_common_entry, node_tmp, head,
1077 tt_local_entry = container_of(tt_common_entry,
1078 struct batadv_tt_local_entry,
1080 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE)
1083 /* entry already marked for deletion */
1084 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)
1087 if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout))
1090 batadv_tt_local_set_pending(bat_priv, tt_local_entry,
1091 BATADV_TT_CLIENT_DEL, "timed out");
1096 * batadv_tt_local_purge - purge inactive tt local entries
1097 * @bat_priv: the bat priv with all the soft interface information
1098 * @timeout: parameter deciding whether a given tt local entry is considered
1101 static void batadv_tt_local_purge(struct batadv_priv *bat_priv,
1104 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
1105 struct hlist_head *head;
1106 spinlock_t *list_lock; /* protects write access to the hash lists */
1109 for (i = 0; i < hash->size; i++) {
1110 head = &hash->table[i];
1111 list_lock = &hash->list_locks[i];
1113 spin_lock_bh(list_lock);
1114 batadv_tt_local_purge_list(bat_priv, head, timeout);
1115 spin_unlock_bh(list_lock);
1119 static void batadv_tt_local_table_free(struct batadv_priv *bat_priv)
1121 struct batadv_hashtable *hash;
1122 spinlock_t *list_lock; /* protects write access to the hash lists */
1123 struct batadv_tt_common_entry *tt_common_entry;
1124 struct batadv_tt_local_entry *tt_local;
1125 struct batadv_softif_vlan *vlan;
1126 struct hlist_node *node_tmp;
1127 struct hlist_head *head;
1130 if (!bat_priv->tt.local_hash)
1133 hash = bat_priv->tt.local_hash;
1135 for (i = 0; i < hash->size; i++) {
1136 head = &hash->table[i];
1137 list_lock = &hash->list_locks[i];
1139 spin_lock_bh(list_lock);
1140 hlist_for_each_entry_safe(tt_common_entry, node_tmp,
1142 hlist_del_rcu(&tt_common_entry->hash_entry);
1143 tt_local = container_of(tt_common_entry,
1144 struct batadv_tt_local_entry,
1147 /* decrease the reference held for this vlan */
1148 vlan = batadv_softif_vlan_get(bat_priv,
1149 tt_common_entry->vid);
1150 batadv_softif_vlan_free_ref(vlan);
1151 batadv_softif_vlan_free_ref(vlan);
1153 batadv_tt_local_entry_free_ref(tt_local);
1155 spin_unlock_bh(list_lock);
1158 batadv_hash_destroy(hash);
1160 bat_priv->tt.local_hash = NULL;
1163 static int batadv_tt_global_init(struct batadv_priv *bat_priv)
1165 if (bat_priv->tt.global_hash)
1168 bat_priv->tt.global_hash = batadv_hash_new(1024);
1170 if (!bat_priv->tt.global_hash)
1173 batadv_hash_set_lock_class(bat_priv->tt.global_hash,
1174 &batadv_tt_global_hash_lock_class_key);
1179 static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv)
1181 struct batadv_tt_change_node *entry, *safe;
1183 spin_lock_bh(&bat_priv->tt.changes_list_lock);
1185 list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
1187 list_del(&entry->list);
1191 atomic_set(&bat_priv->tt.local_changes, 0);
1192 spin_unlock_bh(&bat_priv->tt.changes_list_lock);
1195 /* retrieves the orig_tt_list_entry belonging to orig_node from the
1196 * batadv_tt_global_entry list
1198 * returns it with an increased refcounter, NULL if not found
1200 static struct batadv_tt_orig_list_entry *
1201 batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry,
1202 const struct batadv_orig_node *orig_node)
1204 struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL;
1205 const struct hlist_head *head;
1208 head = &entry->orig_list;
1209 hlist_for_each_entry_rcu(tmp_orig_entry, head, list) {
1210 if (tmp_orig_entry->orig_node != orig_node)
1212 if (!atomic_inc_not_zero(&tmp_orig_entry->refcount))
1215 orig_entry = tmp_orig_entry;
1223 /* find out if an orig_node is already in the list of a tt_global_entry.
1224 * returns true if found, false otherwise
1227 batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry,
1228 const struct batadv_orig_node *orig_node)
1230 struct batadv_tt_orig_list_entry *orig_entry;
1233 orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node);
1236 batadv_tt_orig_list_entry_free_ref(orig_entry);
1243 batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global,
1244 struct batadv_orig_node *orig_node, int ttvn)
1246 struct batadv_tt_orig_list_entry *orig_entry;
1248 orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node);
1250 /* refresh the ttvn: the current value could be a bogus one that
1251 * was added during a "temporary client detection"
1253 orig_entry->ttvn = ttvn;
1257 orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC);
1261 INIT_HLIST_NODE(&orig_entry->list);
1262 atomic_inc(&orig_node->refcount);
1263 batadv_tt_global_size_inc(orig_node, tt_global->common.vid);
1264 orig_entry->orig_node = orig_node;
1265 orig_entry->ttvn = ttvn;
1266 atomic_set(&orig_entry->refcount, 2);
1268 spin_lock_bh(&tt_global->list_lock);
1269 hlist_add_head_rcu(&orig_entry->list,
1270 &tt_global->orig_list);
1271 spin_unlock_bh(&tt_global->list_lock);
1272 atomic_inc(&tt_global->orig_list_count);
1276 batadv_tt_orig_list_entry_free_ref(orig_entry);
1280 * batadv_tt_global_add - add a new TT global entry or update an existing one
1281 * @bat_priv: the bat priv with all the soft interface information
1282 * @orig_node: the originator announcing the client
1283 * @tt_addr: the mac address of the non-mesh client
1284 * @vid: VLAN identifier
1285 * @flags: TT flags that have to be set for this non-mesh client
1286 * @ttvn: the tt version number ever announcing this non-mesh client
1288 * Add a new TT global entry for the given originator. If the entry already
1289 * exists add a new reference to the given originator (a global entry can have
1290 * references to multiple originators) and adjust the flags attribute to reflect
1291 * the function argument.
1292 * If a TT local entry exists for this non-mesh client remove it.
1294 * The caller must hold orig_node refcount.
1296 * Return true if the new entry has been added, false otherwise
1298 static bool batadv_tt_global_add(struct batadv_priv *bat_priv,
1299 struct batadv_orig_node *orig_node,
1300 const unsigned char *tt_addr,
1301 unsigned short vid, uint16_t flags,
1304 struct batadv_tt_global_entry *tt_global_entry;
1305 struct batadv_tt_local_entry *tt_local_entry;
1308 struct batadv_tt_common_entry *common;
1309 uint16_t local_flags;
1311 /* ignore global entries from backbone nodes */
1312 if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid))
1315 tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid);
1316 tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid);
1318 /* if the node already has a local client for this entry, it has to wait
1319 * for a roaming advertisement instead of manually messing up the global
1322 if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry &&
1323 !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW))
1326 if (!tt_global_entry) {
1327 tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC);
1328 if (!tt_global_entry)
1331 common = &tt_global_entry->common;
1332 ether_addr_copy(common->addr, tt_addr);
1335 common->flags = flags;
1336 tt_global_entry->roam_at = 0;
1337 /* node must store current time in case of roaming. This is
1338 * needed to purge this entry out on timeout (if nobody claims
1341 if (flags & BATADV_TT_CLIENT_ROAM)
1342 tt_global_entry->roam_at = jiffies;
1343 atomic_set(&common->refcount, 2);
1344 common->added_at = jiffies;
1346 INIT_HLIST_HEAD(&tt_global_entry->orig_list);
1347 atomic_set(&tt_global_entry->orig_list_count, 0);
1348 spin_lock_init(&tt_global_entry->list_lock);
1350 hash_added = batadv_hash_add(bat_priv->tt.global_hash,
1352 batadv_choose_tt, common,
1353 &common->hash_entry);
1355 if (unlikely(hash_added != 0)) {
1356 /* remove the reference for the hash */
1357 batadv_tt_global_entry_free_ref(tt_global_entry);
1361 common = &tt_global_entry->common;
1362 /* If there is already a global entry, we can use this one for
1364 * But if we are trying to add a temporary client then here are
1365 * two options at this point:
1366 * 1) the global client is not a temporary client: the global
1367 * client has to be left as it is, temporary information
1368 * should never override any already known client state
1369 * 2) the global client is a temporary client: purge the
1370 * originator list and add the new one orig_entry
1372 if (flags & BATADV_TT_CLIENT_TEMP) {
1373 if (!(common->flags & BATADV_TT_CLIENT_TEMP))
1375 if (batadv_tt_global_entry_has_orig(tt_global_entry,
1378 batadv_tt_global_del_orig_list(tt_global_entry);
1379 goto add_orig_entry;
1382 /* if the client was temporary added before receiving the first
1383 * OGM announcing it, we have to clear the TEMP flag
1385 common->flags &= ~BATADV_TT_CLIENT_TEMP;
1387 /* the change can carry possible "attribute" flags like the
1388 * TT_CLIENT_WIFI, therefore they have to be copied in the
1391 tt_global_entry->common.flags |= flags;
1393 /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only
1394 * one originator left in the list and we previously received a
1395 * delete + roaming change for this originator.
1397 * We should first delete the old originator before adding the
1400 if (common->flags & BATADV_TT_CLIENT_ROAM) {
1401 batadv_tt_global_del_orig_list(tt_global_entry);
1402 common->flags &= ~BATADV_TT_CLIENT_ROAM;
1403 tt_global_entry->roam_at = 0;
1407 /* add the new orig_entry (if needed) or update it */
1408 batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn);
1410 batadv_dbg(BATADV_DBG_TT, bat_priv,
1411 "Creating new global tt entry: %pM (vid: %d, via %pM)\n",
1412 common->addr, BATADV_PRINT_VID(common->vid),
1417 /* Do not remove multicast addresses from the local hash on
1420 if (is_multicast_ether_addr(tt_addr))
1423 /* remove address from local hash if present */
1424 local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid,
1425 "global tt received",
1426 flags & BATADV_TT_CLIENT_ROAM);
1427 tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI;
1429 if (!(flags & BATADV_TT_CLIENT_ROAM))
1430 /* this is a normal global add. Therefore the client is not in a
1431 * roaming state anymore.
1433 tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM;
1436 if (tt_global_entry)
1437 batadv_tt_global_entry_free_ref(tt_global_entry);
1439 batadv_tt_local_entry_free_ref(tt_local_entry);
1444 * batadv_transtable_best_orig - Get best originator list entry from tt entry
1445 * @bat_priv: the bat priv with all the soft interface information
1446 * @tt_global_entry: global translation table entry to be analyzed
1448 * This functon assumes the caller holds rcu_read_lock().
1449 * Returns best originator list entry or NULL on errors.
1451 static struct batadv_tt_orig_list_entry *
1452 batadv_transtable_best_orig(struct batadv_priv *bat_priv,
1453 struct batadv_tt_global_entry *tt_global_entry)
1455 struct batadv_neigh_node *router, *best_router = NULL;
1456 struct batadv_algo_ops *bao = bat_priv->bat_algo_ops;
1457 struct hlist_head *head;
1458 struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL;
1460 head = &tt_global_entry->orig_list;
1461 hlist_for_each_entry_rcu(orig_entry, head, list) {
1462 router = batadv_orig_router_get(orig_entry->orig_node,
1468 bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT,
1469 best_router, BATADV_IF_DEFAULT) <= 0) {
1470 batadv_neigh_node_free_ref(router);
1474 /* release the refcount for the "old" best */
1476 batadv_neigh_node_free_ref(best_router);
1478 best_entry = orig_entry;
1479 best_router = router;
1483 batadv_neigh_node_free_ref(best_router);
1489 * batadv_tt_global_print_entry - print all orig nodes who announce the address
1490 * for this global entry
1491 * @bat_priv: the bat priv with all the soft interface information
1492 * @tt_global_entry: global translation table entry to be printed
1493 * @seq: debugfs table seq_file struct
1495 * This functon assumes the caller holds rcu_read_lock().
1498 batadv_tt_global_print_entry(struct batadv_priv *bat_priv,
1499 struct batadv_tt_global_entry *tt_global_entry,
1500 struct seq_file *seq)
1502 struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
1503 struct batadv_tt_common_entry *tt_common_entry;
1504 struct batadv_orig_node_vlan *vlan;
1505 struct hlist_head *head;
1509 tt_common_entry = &tt_global_entry->common;
1510 flags = tt_common_entry->flags;
1512 best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
1514 vlan = batadv_orig_node_vlan_get(best_entry->orig_node,
1515 tt_common_entry->vid);
1518 " * Cannot retrieve VLAN %d for originator %pM\n",
1519 BATADV_PRINT_VID(tt_common_entry->vid),
1520 best_entry->orig_node->orig);
1524 last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn);
1526 " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1527 '*', tt_global_entry->common.addr,
1528 BATADV_PRINT_VID(tt_global_entry->common.vid),
1529 best_entry->ttvn, best_entry->orig_node->orig,
1530 last_ttvn, vlan->tt.crc,
1531 (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'),
1532 (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'),
1533 (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'),
1534 (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.'));
1536 batadv_orig_node_vlan_free_ref(vlan);
1540 head = &tt_global_entry->orig_list;
1542 hlist_for_each_entry_rcu(orig_entry, head, list) {
1543 if (best_entry == orig_entry)
1546 vlan = batadv_orig_node_vlan_get(orig_entry->orig_node,
1547 tt_common_entry->vid);
1550 " + Cannot retrieve VLAN %d for originator %pM\n",
1551 BATADV_PRINT_VID(tt_common_entry->vid),
1552 orig_entry->orig_node->orig);
1556 last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn);
1558 " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1559 '+', tt_global_entry->common.addr,
1560 BATADV_PRINT_VID(tt_global_entry->common.vid),
1561 orig_entry->ttvn, orig_entry->orig_node->orig,
1562 last_ttvn, vlan->tt.crc,
1563 (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'),
1564 (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'),
1565 (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'),
1566 (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.'));
1568 batadv_orig_node_vlan_free_ref(vlan);
1572 int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset)
1574 struct net_device *net_dev = (struct net_device *)seq->private;
1575 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1576 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
1577 struct batadv_tt_common_entry *tt_common_entry;
1578 struct batadv_tt_global_entry *tt_global;
1579 struct batadv_hard_iface *primary_if;
1580 struct hlist_head *head;
1583 primary_if = batadv_seq_print_text_primary_if_get(seq);
1588 "Globally announced TT entries received via the mesh %s\n",
1590 seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n",
1591 "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)",
1594 for (i = 0; i < hash->size; i++) {
1595 head = &hash->table[i];
1598 hlist_for_each_entry_rcu(tt_common_entry,
1600 tt_global = container_of(tt_common_entry,
1601 struct batadv_tt_global_entry,
1603 batadv_tt_global_print_entry(bat_priv, tt_global, seq);
1609 batadv_hardif_free_ref(primary_if);
1614 * batadv_tt_global_del_orig_entry - remove and free an orig_entry
1615 * @tt_global_entry: the global entry to remove the orig_entry from
1616 * @orig_entry: the orig entry to remove and free
1618 * Remove an orig_entry from its list in the given tt_global_entry and
1619 * free this orig_entry afterwards.
1622 batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry,
1623 struct batadv_tt_orig_list_entry *orig_entry)
1625 batadv_tt_global_size_dec(orig_entry->orig_node,
1626 tt_global_entry->common.vid);
1627 atomic_dec(&tt_global_entry->orig_list_count);
1628 hlist_del_rcu(&orig_entry->list);
1629 batadv_tt_orig_list_entry_free_ref(orig_entry);
1632 /* deletes the orig list of a tt_global_entry */
1634 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry)
1636 struct hlist_head *head;
1637 struct hlist_node *safe;
1638 struct batadv_tt_orig_list_entry *orig_entry;
1640 spin_lock_bh(&tt_global_entry->list_lock);
1641 head = &tt_global_entry->orig_list;
1642 hlist_for_each_entry_safe(orig_entry, safe, head, list)
1643 batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry);
1644 spin_unlock_bh(&tt_global_entry->list_lock);
1648 * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry
1649 * @bat_priv: the bat priv with all the soft interface information
1650 * @tt_global_entry: the global entry to remove the orig_node from
1651 * @orig_node: the originator announcing the client
1652 * @message: message to append to the log on deletion
1654 * Remove the given orig_node and its according orig_entry from the given
1658 batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv,
1659 struct batadv_tt_global_entry *tt_global_entry,
1660 struct batadv_orig_node *orig_node,
1661 const char *message)
1663 struct hlist_head *head;
1664 struct hlist_node *safe;
1665 struct batadv_tt_orig_list_entry *orig_entry;
1668 spin_lock_bh(&tt_global_entry->list_lock);
1669 head = &tt_global_entry->orig_list;
1670 hlist_for_each_entry_safe(orig_entry, safe, head, list) {
1671 if (orig_entry->orig_node == orig_node) {
1672 vid = tt_global_entry->common.vid;
1673 batadv_dbg(BATADV_DBG_TT, bat_priv,
1674 "Deleting %pM from global tt entry %pM (vid: %d): %s\n",
1676 tt_global_entry->common.addr,
1677 BATADV_PRINT_VID(vid), message);
1678 batadv_tt_global_del_orig_entry(tt_global_entry,
1682 spin_unlock_bh(&tt_global_entry->list_lock);
1685 /* If the client is to be deleted, we check if it is the last origantor entry
1686 * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the
1687 * timer, otherwise we simply remove the originator scheduled for deletion.
1690 batadv_tt_global_del_roaming(struct batadv_priv *bat_priv,
1691 struct batadv_tt_global_entry *tt_global_entry,
1692 struct batadv_orig_node *orig_node,
1693 const char *message)
1695 bool last_entry = true;
1696 struct hlist_head *head;
1697 struct batadv_tt_orig_list_entry *orig_entry;
1699 /* no local entry exists, case 1:
1700 * Check if this is the last one or if other entries exist.
1704 head = &tt_global_entry->orig_list;
1705 hlist_for_each_entry_rcu(orig_entry, head, list) {
1706 if (orig_entry->orig_node != orig_node) {
1714 /* its the last one, mark for roaming. */
1715 tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM;
1716 tt_global_entry->roam_at = jiffies;
1718 /* there is another entry, we can simply delete this
1719 * one and can still use the other one.
1721 batadv_tt_global_del_orig_node(bat_priv, tt_global_entry,
1722 orig_node, message);
1726 * batadv_tt_global_del - remove a client from the global table
1727 * @bat_priv: the bat priv with all the soft interface information
1728 * @orig_node: an originator serving this client
1729 * @addr: the mac address of the client
1730 * @vid: VLAN identifier
1731 * @message: a message explaining the reason for deleting the client to print
1732 * for debugging purpose
1733 * @roaming: true if the deletion has been triggered by a roaming event
1735 static void batadv_tt_global_del(struct batadv_priv *bat_priv,
1736 struct batadv_orig_node *orig_node,
1737 const unsigned char *addr, unsigned short vid,
1738 const char *message, bool roaming)
1740 struct batadv_tt_global_entry *tt_global_entry;
1741 struct batadv_tt_local_entry *local_entry = NULL;
1743 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
1744 if (!tt_global_entry)
1748 batadv_tt_global_del_orig_node(bat_priv, tt_global_entry,
1749 orig_node, message);
1751 if (hlist_empty(&tt_global_entry->orig_list))
1752 batadv_tt_global_free(bat_priv, tt_global_entry,
1758 /* if we are deleting a global entry due to a roam
1759 * event, there are two possibilities:
1760 * 1) the client roamed from node A to node B => if there
1761 * is only one originator left for this client, we mark
1762 * it with BATADV_TT_CLIENT_ROAM, we start a timer and we
1763 * wait for node B to claim it. In case of timeout
1764 * the entry is purged.
1766 * If there are other originators left, we directly delete
1768 * 2) the client roamed to us => we can directly delete
1769 * the global entry, since it is useless now.
1771 local_entry = batadv_tt_local_hash_find(bat_priv,
1772 tt_global_entry->common.addr,
1775 /* local entry exists, case 2: client roamed to us. */
1776 batadv_tt_global_del_orig_list(tt_global_entry);
1777 batadv_tt_global_free(bat_priv, tt_global_entry, message);
1779 /* no local entry exists, case 1: check for roaming */
1780 batadv_tt_global_del_roaming(bat_priv, tt_global_entry,
1781 orig_node, message);
1785 if (tt_global_entry)
1786 batadv_tt_global_entry_free_ref(tt_global_entry);
1788 batadv_tt_local_entry_free_ref(local_entry);
1792 * batadv_tt_global_del_orig - remove all the TT global entries belonging to the
1793 * given originator matching the provided vid
1794 * @bat_priv: the bat priv with all the soft interface information
1795 * @orig_node: the originator owning the entries to remove
1796 * @match_vid: the VLAN identifier to match. If negative all the entries will be
1798 * @message: debug message to print as "reason"
1800 void batadv_tt_global_del_orig(struct batadv_priv *bat_priv,
1801 struct batadv_orig_node *orig_node,
1803 const char *message)
1805 struct batadv_tt_global_entry *tt_global;
1806 struct batadv_tt_common_entry *tt_common_entry;
1808 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
1809 struct hlist_node *safe;
1810 struct hlist_head *head;
1811 spinlock_t *list_lock; /* protects write access to the hash lists */
1817 for (i = 0; i < hash->size; i++) {
1818 head = &hash->table[i];
1819 list_lock = &hash->list_locks[i];
1821 spin_lock_bh(list_lock);
1822 hlist_for_each_entry_safe(tt_common_entry, safe,
1824 /* remove only matching entries */
1825 if (match_vid >= 0 && tt_common_entry->vid != match_vid)
1828 tt_global = container_of(tt_common_entry,
1829 struct batadv_tt_global_entry,
1832 batadv_tt_global_del_orig_node(bat_priv, tt_global,
1833 orig_node, message);
1835 if (hlist_empty(&tt_global->orig_list)) {
1836 vid = tt_global->common.vid;
1837 batadv_dbg(BATADV_DBG_TT, bat_priv,
1838 "Deleting global tt entry %pM (vid: %d): %s\n",
1839 tt_global->common.addr,
1840 BATADV_PRINT_VID(vid), message);
1841 hlist_del_rcu(&tt_common_entry->hash_entry);
1842 batadv_tt_global_entry_free_ref(tt_global);
1845 spin_unlock_bh(list_lock);
1847 orig_node->capa_initialized &= ~BATADV_ORIG_CAPA_HAS_TT;
1850 static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global,
1854 unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT;
1855 unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT;
1857 if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) &&
1858 batadv_has_timed_out(tt_global->roam_at, roam_timeout)) {
1860 *msg = "Roaming timeout\n";
1863 if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) &&
1864 batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) {
1866 *msg = "Temporary client timeout\n";
1872 static void batadv_tt_global_purge(struct batadv_priv *bat_priv)
1874 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
1875 struct hlist_head *head;
1876 struct hlist_node *node_tmp;
1877 spinlock_t *list_lock; /* protects write access to the hash lists */
1880 struct batadv_tt_common_entry *tt_common;
1881 struct batadv_tt_global_entry *tt_global;
1883 for (i = 0; i < hash->size; i++) {
1884 head = &hash->table[i];
1885 list_lock = &hash->list_locks[i];
1887 spin_lock_bh(list_lock);
1888 hlist_for_each_entry_safe(tt_common, node_tmp, head,
1890 tt_global = container_of(tt_common,
1891 struct batadv_tt_global_entry,
1894 if (!batadv_tt_global_to_purge(tt_global, &msg))
1897 batadv_dbg(BATADV_DBG_TT, bat_priv,
1898 "Deleting global tt entry %pM (vid: %d): %s\n",
1899 tt_global->common.addr,
1900 BATADV_PRINT_VID(tt_global->common.vid),
1903 hlist_del_rcu(&tt_common->hash_entry);
1905 batadv_tt_global_entry_free_ref(tt_global);
1907 spin_unlock_bh(list_lock);
1911 static void batadv_tt_global_table_free(struct batadv_priv *bat_priv)
1913 struct batadv_hashtable *hash;
1914 spinlock_t *list_lock; /* protects write access to the hash lists */
1915 struct batadv_tt_common_entry *tt_common_entry;
1916 struct batadv_tt_global_entry *tt_global;
1917 struct hlist_node *node_tmp;
1918 struct hlist_head *head;
1921 if (!bat_priv->tt.global_hash)
1924 hash = bat_priv->tt.global_hash;
1926 for (i = 0; i < hash->size; i++) {
1927 head = &hash->table[i];
1928 list_lock = &hash->list_locks[i];
1930 spin_lock_bh(list_lock);
1931 hlist_for_each_entry_safe(tt_common_entry, node_tmp,
1933 hlist_del_rcu(&tt_common_entry->hash_entry);
1934 tt_global = container_of(tt_common_entry,
1935 struct batadv_tt_global_entry,
1937 batadv_tt_global_entry_free_ref(tt_global);
1939 spin_unlock_bh(list_lock);
1942 batadv_hash_destroy(hash);
1944 bat_priv->tt.global_hash = NULL;
1948 _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry,
1949 struct batadv_tt_global_entry *tt_global_entry)
1953 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI &&
1954 tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI)
1957 /* check if the two clients are marked as isolated */
1958 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA &&
1959 tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA)
1966 * batadv_transtable_search - get the mesh destination for a given client
1967 * @bat_priv: the bat priv with all the soft interface information
1968 * @src: mac address of the source client
1969 * @addr: mac address of the destination client
1970 * @vid: VLAN identifier
1972 * Returns a pointer to the originator that was selected as destination in the
1973 * mesh for contacting the client 'addr', NULL otherwise.
1974 * In case of multiple originators serving the same client, the function returns
1975 * the best one (best in terms of metric towards the destination node).
1977 * If the two clients are AP isolated the function returns NULL.
1979 struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv,
1981 const uint8_t *addr,
1984 struct batadv_tt_local_entry *tt_local_entry = NULL;
1985 struct batadv_tt_global_entry *tt_global_entry = NULL;
1986 struct batadv_orig_node *orig_node = NULL;
1987 struct batadv_tt_orig_list_entry *best_entry;
1989 if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) {
1990 tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid);
1991 if (!tt_local_entry ||
1992 (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING))
1996 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
1997 if (!tt_global_entry)
2000 /* check whether the clients should not communicate due to AP
2003 if (tt_local_entry &&
2004 _batadv_is_ap_isolated(tt_local_entry, tt_global_entry))
2008 best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
2009 /* found anything? */
2011 orig_node = best_entry->orig_node;
2012 if (orig_node && !atomic_inc_not_zero(&orig_node->refcount))
2017 if (tt_global_entry)
2018 batadv_tt_global_entry_free_ref(tt_global_entry);
2020 batadv_tt_local_entry_free_ref(tt_local_entry);
2026 * batadv_tt_global_crc - calculates the checksum of the local table belonging
2027 * to the given orig_node
2028 * @bat_priv: the bat priv with all the soft interface information
2029 * @orig_node: originator for which the CRC should be computed
2030 * @vid: VLAN identifier for which the CRC32 has to be computed
2032 * This function computes the checksum for the global table corresponding to a
2033 * specific originator. In particular, the checksum is computed as follows: For
2034 * each client connected to the originator the CRC32C of the MAC address and the
2035 * VID is computed and then all the CRC32Cs of the various clients are xor'ed
2038 * The idea behind is that CRC32C should be used as much as possible in order to
2039 * produce a unique hash of the table, but since the order which is used to feed
2040 * the CRC32C function affects the result and since every node in the network
2041 * probably sorts the clients differently, the hash function cannot be directly
2042 * computed over the entire table. Hence the CRC32C is used only on
2043 * the single client entry, while all the results are then xor'ed together
2044 * because the XOR operation can combine them all while trying to reduce the
2045 * noise as much as possible.
2047 * Returns the checksum of the global table of a given originator.
2049 static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv,
2050 struct batadv_orig_node *orig_node,
2053 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2054 struct batadv_tt_common_entry *tt_common;
2055 struct batadv_tt_global_entry *tt_global;
2056 struct hlist_head *head;
2057 uint32_t i, crc_tmp, crc = 0;
2061 for (i = 0; i < hash->size; i++) {
2062 head = &hash->table[i];
2065 hlist_for_each_entry_rcu(tt_common, head, hash_entry) {
2066 tt_global = container_of(tt_common,
2067 struct batadv_tt_global_entry,
2069 /* compute the CRC only for entries belonging to the
2070 * VLAN identified by the vid passed as parameter
2072 if (tt_common->vid != vid)
2075 /* Roaming clients are in the global table for
2076 * consistency only. They don't have to be
2077 * taken into account while computing the
2080 if (tt_common->flags & BATADV_TT_CLIENT_ROAM)
2082 /* Temporary clients have not been announced yet, so
2083 * they have to be skipped while computing the global
2086 if (tt_common->flags & BATADV_TT_CLIENT_TEMP)
2089 /* find out if this global entry is announced by this
2092 if (!batadv_tt_global_entry_has_orig(tt_global,
2096 /* use network order to read the VID: this ensures that
2097 * every node reads the bytes in the same order.
2099 tmp_vid = htons(tt_common->vid);
2100 crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid));
2102 /* compute the CRC on flags that have to be kept in sync
2105 flags = tt_common->flags & BATADV_TT_SYNC_MASK;
2106 crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
2108 crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
2117 * batadv_tt_local_crc - calculates the checksum of the local table
2118 * @bat_priv: the bat priv with all the soft interface information
2119 * @vid: VLAN identifier for which the CRC32 has to be computed
2121 * For details about the computation, please refer to the documentation for
2122 * batadv_tt_global_crc().
2124 * Returns the checksum of the local table
2126 static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv,
2129 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
2130 struct batadv_tt_common_entry *tt_common;
2131 struct hlist_head *head;
2132 uint32_t i, crc_tmp, crc = 0;
2136 for (i = 0; i < hash->size; i++) {
2137 head = &hash->table[i];
2140 hlist_for_each_entry_rcu(tt_common, head, hash_entry) {
2141 /* compute the CRC only for entries belonging to the
2142 * VLAN identified by vid
2144 if (tt_common->vid != vid)
2147 /* not yet committed clients have not to be taken into
2148 * account while computing the CRC
2150 if (tt_common->flags & BATADV_TT_CLIENT_NEW)
2153 /* use network order to read the VID: this ensures that
2154 * every node reads the bytes in the same order.
2156 tmp_vid = htons(tt_common->vid);
2157 crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid));
2159 /* compute the CRC on flags that have to be kept in sync
2162 flags = tt_common->flags & BATADV_TT_SYNC_MASK;
2163 crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
2165 crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
2173 static void batadv_tt_req_list_free(struct batadv_priv *bat_priv)
2175 struct batadv_tt_req_node *node, *safe;
2177 spin_lock_bh(&bat_priv->tt.req_list_lock);
2179 list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
2180 list_del(&node->list);
2184 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2187 static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv,
2188 struct batadv_orig_node *orig_node,
2189 const void *tt_buff,
2190 uint16_t tt_buff_len)
2192 /* Replace the old buffer only if I received something in the
2193 * last OGM (the OGM could carry no changes)
2195 spin_lock_bh(&orig_node->tt_buff_lock);
2196 if (tt_buff_len > 0) {
2197 kfree(orig_node->tt_buff);
2198 orig_node->tt_buff_len = 0;
2199 orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC);
2200 if (orig_node->tt_buff) {
2201 memcpy(orig_node->tt_buff, tt_buff, tt_buff_len);
2202 orig_node->tt_buff_len = tt_buff_len;
2205 spin_unlock_bh(&orig_node->tt_buff_lock);
2208 static void batadv_tt_req_purge(struct batadv_priv *bat_priv)
2210 struct batadv_tt_req_node *node, *safe;
2212 spin_lock_bh(&bat_priv->tt.req_list_lock);
2213 list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
2214 if (batadv_has_timed_out(node->issued_at,
2215 BATADV_TT_REQUEST_TIMEOUT)) {
2216 list_del(&node->list);
2220 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2223 /* returns the pointer to the new tt_req_node struct if no request
2224 * has already been issued for this orig_node, NULL otherwise
2226 static struct batadv_tt_req_node *
2227 batadv_new_tt_req_node(struct batadv_priv *bat_priv,
2228 struct batadv_orig_node *orig_node)
2230 struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL;
2232 spin_lock_bh(&bat_priv->tt.req_list_lock);
2233 list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) {
2234 if (batadv_compare_eth(tt_req_node_tmp, orig_node) &&
2235 !batadv_has_timed_out(tt_req_node_tmp->issued_at,
2236 BATADV_TT_REQUEST_TIMEOUT))
2240 tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC);
2244 ether_addr_copy(tt_req_node->addr, orig_node->orig);
2245 tt_req_node->issued_at = jiffies;
2247 list_add(&tt_req_node->list, &bat_priv->tt.req_list);
2249 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2254 * batadv_tt_local_valid - verify that given tt entry is a valid one
2255 * @entry_ptr: to be checked local tt entry
2256 * @data_ptr: not used but definition required to satisfy the callback prototype
2258 * Returns 1 if the entry is a valid, 0 otherwise.
2260 static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr)
2262 const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
2264 if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW)
2269 static int batadv_tt_global_valid(const void *entry_ptr,
2270 const void *data_ptr)
2272 const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
2273 const struct batadv_tt_global_entry *tt_global_entry;
2274 const struct batadv_orig_node *orig_node = data_ptr;
2276 if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM ||
2277 tt_common_entry->flags & BATADV_TT_CLIENT_TEMP)
2280 tt_global_entry = container_of(tt_common_entry,
2281 struct batadv_tt_global_entry,
2284 return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node);
2288 * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the
2290 * @bat_priv: the bat priv with all the soft interface information
2291 * @hash: hash table containing the tt entries
2292 * @tt_len: expected tvlv tt data buffer length in number of bytes
2293 * @tvlv_buff: pointer to the buffer to fill with the TT data
2294 * @valid_cb: function to filter tt change entries
2295 * @cb_data: data passed to the filter function as argument
2297 static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
2298 struct batadv_hashtable *hash,
2299 void *tvlv_buff, uint16_t tt_len,
2300 int (*valid_cb)(const void *, const void *),
2303 struct batadv_tt_common_entry *tt_common_entry;
2304 struct batadv_tvlv_tt_change *tt_change;
2305 struct hlist_head *head;
2306 uint16_t tt_tot, tt_num_entries = 0;
2309 tt_tot = batadv_tt_entries(tt_len);
2310 tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff;
2313 for (i = 0; i < hash->size; i++) {
2314 head = &hash->table[i];
2316 hlist_for_each_entry_rcu(tt_common_entry,
2318 if (tt_tot == tt_num_entries)
2321 if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data)))
2324 ether_addr_copy(tt_change->addr, tt_common_entry->addr);
2325 tt_change->flags = tt_common_entry->flags;
2326 tt_change->vid = htons(tt_common_entry->vid);
2327 memset(tt_change->reserved, 0,
2328 sizeof(tt_change->reserved));
2338 * batadv_tt_global_check_crc - check if all the CRCs are correct
2339 * @orig_node: originator for which the CRCs have to be checked
2340 * @tt_vlan: pointer to the first tvlv VLAN entry
2341 * @num_vlan: number of tvlv VLAN entries
2342 * @create: if true, create VLAN objects if not found
2344 * Return true if all the received CRCs match the locally stored ones, false
2347 static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node,
2348 struct batadv_tvlv_tt_vlan_data *tt_vlan,
2351 struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp;
2352 struct batadv_orig_node_vlan *vlan;
2356 /* check if each received CRC matches the locally stored one */
2357 for (i = 0; i < num_vlan; i++) {
2358 tt_vlan_tmp = tt_vlan + i;
2360 /* if orig_node is a backbone node for this VLAN, don't check
2361 * the CRC as we ignore all the global entries over it
2363 if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv,
2365 ntohs(tt_vlan_tmp->vid)))
2368 vlan = batadv_orig_node_vlan_get(orig_node,
2369 ntohs(tt_vlan_tmp->vid));
2374 batadv_orig_node_vlan_free_ref(vlan);
2376 if (crc != ntohl(tt_vlan_tmp->crc))
2384 * batadv_tt_local_update_crc - update all the local CRCs
2385 * @bat_priv: the bat priv with all the soft interface information
2387 static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv)
2389 struct batadv_softif_vlan *vlan;
2391 /* recompute the global CRC for each VLAN */
2393 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
2394 vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid);
2400 * batadv_tt_global_update_crc - update all the global CRCs for this orig_node
2401 * @bat_priv: the bat priv with all the soft interface information
2402 * @orig_node: the orig_node for which the CRCs have to be updated
2404 static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv,
2405 struct batadv_orig_node *orig_node)
2407 struct batadv_orig_node_vlan *vlan;
2410 /* recompute the global CRC for each VLAN */
2412 list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
2413 /* if orig_node is a backbone node for this VLAN, don't compute
2414 * the CRC as we ignore all the global entries over it
2416 if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig,
2420 crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid);
2427 * batadv_send_tt_request - send a TT Request message to a given node
2428 * @bat_priv: the bat priv with all the soft interface information
2429 * @dst_orig_node: the destination of the message
2430 * @ttvn: the version number that the source of the message is looking for
2431 * @tt_vlan: pointer to the first tvlv VLAN object to request
2432 * @num_vlan: number of tvlv VLAN entries
2433 * @full_table: ask for the entire translation table if true, while only for the
2434 * last TT diff otherwise
2436 static int batadv_send_tt_request(struct batadv_priv *bat_priv,
2437 struct batadv_orig_node *dst_orig_node,
2439 struct batadv_tvlv_tt_vlan_data *tt_vlan,
2440 uint16_t num_vlan, bool full_table)
2442 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
2443 struct batadv_tt_req_node *tt_req_node = NULL;
2444 struct batadv_tvlv_tt_vlan_data *tt_vlan_req;
2445 struct batadv_hard_iface *primary_if;
2449 primary_if = batadv_primary_if_get_selected(bat_priv);
2453 /* The new tt_req will be issued only if I'm not waiting for a
2454 * reply from the same orig_node yet
2456 tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node);
2460 size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan;
2461 tvlv_tt_data = kzalloc(size, GFP_ATOMIC);
2465 tvlv_tt_data->flags = BATADV_TT_REQUEST;
2466 tvlv_tt_data->ttvn = ttvn;
2467 tvlv_tt_data->num_vlan = htons(num_vlan);
2469 /* send all the CRCs within the request. This is needed by intermediate
2470 * nodes to ensure they have the correct table before replying
2472 tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1);
2473 for (i = 0; i < num_vlan; i++) {
2474 tt_vlan_req->vid = tt_vlan->vid;
2475 tt_vlan_req->crc = tt_vlan->crc;
2482 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
2484 batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n",
2485 dst_orig_node->orig, full_table ? 'F' : '.');
2487 batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX);
2488 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
2489 dst_orig_node->orig, BATADV_TVLV_TT, 1,
2490 tvlv_tt_data, size);
2495 batadv_hardif_free_ref(primary_if);
2496 if (ret && tt_req_node) {
2497 spin_lock_bh(&bat_priv->tt.req_list_lock);
2498 list_del(&tt_req_node->list);
2499 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2502 kfree(tvlv_tt_data);
2507 * batadv_send_other_tt_response - send reply to tt request concerning another
2508 * node's translation table
2509 * @bat_priv: the bat priv with all the soft interface information
2510 * @tt_data: tt data containing the tt request information
2511 * @req_src: mac address of tt request sender
2512 * @req_dst: mac address of tt request recipient
2514 * Returns true if tt request reply was sent, false otherwise.
2516 static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv,
2517 struct batadv_tvlv_tt_data *tt_data,
2518 uint8_t *req_src, uint8_t *req_dst)
2520 struct batadv_orig_node *req_dst_orig_node;
2521 struct batadv_orig_node *res_dst_orig_node = NULL;
2522 struct batadv_tvlv_tt_change *tt_change;
2523 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
2524 struct batadv_tvlv_tt_vlan_data *tt_vlan;
2525 bool ret = false, full_table;
2526 uint8_t orig_ttvn, req_ttvn;
2530 batadv_dbg(BATADV_DBG_TT, bat_priv,
2531 "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n",
2532 req_src, tt_data->ttvn, req_dst,
2533 (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.'));
2535 /* Let's get the orig node of the REAL destination */
2536 req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst);
2537 if (!req_dst_orig_node)
2540 res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src);
2541 if (!res_dst_orig_node)
2544 orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn);
2545 req_ttvn = tt_data->ttvn;
2547 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
2548 /* this node doesn't have the requested data */
2549 if (orig_ttvn != req_ttvn ||
2550 !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan,
2551 ntohs(tt_data->num_vlan)))
2554 /* If the full table has been explicitly requested */
2555 if (tt_data->flags & BATADV_TT_FULL_TABLE ||
2556 !req_dst_orig_node->tt_buff)
2561 /* TT fragmentation hasn't been implemented yet, so send as many
2562 * TT entries fit a single packet as possible only
2565 spin_lock_bh(&req_dst_orig_node->tt_buff_lock);
2566 tt_len = req_dst_orig_node->tt_buff_len;
2568 tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
2575 /* Copy the last orig_node's OGM buffer */
2576 memcpy(tt_change, req_dst_orig_node->tt_buff,
2577 req_dst_orig_node->tt_buff_len);
2578 spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
2580 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
2581 * in the initial part
2584 tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
2591 /* fill the rest of the tvlv with the real TT entries */
2592 batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash,
2594 batadv_tt_global_valid,
2598 /* Don't send the response, if larger than fragmented packet. */
2599 tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len;
2600 if (tt_len > atomic_read(&bat_priv->packet_size_max)) {
2601 net_ratelimited_function(batadv_info, bat_priv->soft_iface,
2602 "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n",
2603 res_dst_orig_node->orig);
2607 tvlv_tt_data->flags = BATADV_TT_RESPONSE;
2608 tvlv_tt_data->ttvn = req_ttvn;
2611 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
2613 batadv_dbg(BATADV_DBG_TT, bat_priv,
2614 "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n",
2615 res_dst_orig_node->orig, req_dst_orig_node->orig,
2616 full_table ? 'F' : '.', req_ttvn);
2618 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
2620 batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig,
2621 req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
2628 spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
2631 if (res_dst_orig_node)
2632 batadv_orig_node_free_ref(res_dst_orig_node);
2633 if (req_dst_orig_node)
2634 batadv_orig_node_free_ref(req_dst_orig_node);
2635 kfree(tvlv_tt_data);
2640 * batadv_send_my_tt_response - send reply to tt request concerning this node's
2642 * @bat_priv: the bat priv with all the soft interface information
2643 * @tt_data: tt data containing the tt request information
2644 * @req_src: mac address of tt request sender
2646 * Returns true if tt request reply was sent, false otherwise.
2648 static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv,
2649 struct batadv_tvlv_tt_data *tt_data,
2652 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
2653 struct batadv_hard_iface *primary_if = NULL;
2654 struct batadv_tvlv_tt_change *tt_change;
2655 struct batadv_orig_node *orig_node;
2656 uint8_t my_ttvn, req_ttvn;
2661 batadv_dbg(BATADV_DBG_TT, bat_priv,
2662 "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
2663 req_src, tt_data->ttvn,
2664 (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.'));
2666 spin_lock_bh(&bat_priv->tt.commit_lock);
2668 my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn);
2669 req_ttvn = tt_data->ttvn;
2671 orig_node = batadv_orig_hash_find(bat_priv, req_src);
2675 primary_if = batadv_primary_if_get_selected(bat_priv);
2679 /* If the full table has been explicitly requested or the gap
2680 * is too big send the whole local translation table
2682 if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn ||
2683 !bat_priv->tt.last_changeset)
2688 /* TT fragmentation hasn't been implemented yet, so send as many
2689 * TT entries fit a single packet as possible only
2692 spin_lock_bh(&bat_priv->tt.last_changeset_lock);
2694 tt_len = bat_priv->tt.last_changeset_len;
2695 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
2702 /* Copy the last orig_node's OGM buffer */
2703 memcpy(tt_change, bat_priv->tt.last_changeset,
2704 bat_priv->tt.last_changeset_len);
2705 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
2707 req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn);
2709 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
2710 * in the initial part
2713 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
2720 /* fill the rest of the tvlv with the real TT entries */
2721 batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash,
2723 batadv_tt_local_valid, NULL);
2726 tvlv_tt_data->flags = BATADV_TT_RESPONSE;
2727 tvlv_tt_data->ttvn = req_ttvn;
2730 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
2732 batadv_dbg(BATADV_DBG_TT, bat_priv,
2733 "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n",
2734 orig_node->orig, full_table ? 'F' : '.', req_ttvn);
2736 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
2738 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
2739 req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
2745 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
2747 spin_unlock_bh(&bat_priv->tt.commit_lock);
2749 batadv_orig_node_free_ref(orig_node);
2751 batadv_hardif_free_ref(primary_if);
2752 kfree(tvlv_tt_data);
2753 /* The packet was for this host, so it doesn't need to be re-routed */
2758 * batadv_send_tt_response - send reply to tt request
2759 * @bat_priv: the bat priv with all the soft interface information
2760 * @tt_data: tt data containing the tt request information
2761 * @req_src: mac address of tt request sender
2762 * @req_dst: mac address of tt request recipient
2764 * Returns true if tt request reply was sent, false otherwise.
2766 static bool batadv_send_tt_response(struct batadv_priv *bat_priv,
2767 struct batadv_tvlv_tt_data *tt_data,
2768 uint8_t *req_src, uint8_t *req_dst)
2770 if (batadv_is_my_mac(bat_priv, req_dst))
2771 return batadv_send_my_tt_response(bat_priv, tt_data, req_src);
2773 return batadv_send_other_tt_response(bat_priv, tt_data,
2777 static void _batadv_tt_update_changes(struct batadv_priv *bat_priv,
2778 struct batadv_orig_node *orig_node,
2779 struct batadv_tvlv_tt_change *tt_change,
2780 uint16_t tt_num_changes, uint8_t ttvn)
2785 for (i = 0; i < tt_num_changes; i++) {
2786 if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) {
2787 roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM;
2788 batadv_tt_global_del(bat_priv, orig_node,
2789 (tt_change + i)->addr,
2790 ntohs((tt_change + i)->vid),
2791 "tt removed by changes",
2794 if (!batadv_tt_global_add(bat_priv, orig_node,
2795 (tt_change + i)->addr,
2796 ntohs((tt_change + i)->vid),
2797 (tt_change + i)->flags, ttvn))
2798 /* In case of problem while storing a
2799 * global_entry, we stop the updating
2800 * procedure without committing the
2801 * ttvn change. This will avoid to send
2802 * corrupted data on tt_request
2807 orig_node->capa_initialized |= BATADV_ORIG_CAPA_HAS_TT;
2810 static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv,
2811 struct batadv_tvlv_tt_change *tt_change,
2812 uint8_t ttvn, uint8_t *resp_src,
2813 uint16_t num_entries)
2815 struct batadv_orig_node *orig_node;
2817 orig_node = batadv_orig_hash_find(bat_priv, resp_src);
2821 /* Purge the old table first.. */
2822 batadv_tt_global_del_orig(bat_priv, orig_node, -1,
2823 "Received full table");
2825 _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries,
2828 spin_lock_bh(&orig_node->tt_buff_lock);
2829 kfree(orig_node->tt_buff);
2830 orig_node->tt_buff_len = 0;
2831 orig_node->tt_buff = NULL;
2832 spin_unlock_bh(&orig_node->tt_buff_lock);
2834 atomic_set(&orig_node->last_ttvn, ttvn);
2838 batadv_orig_node_free_ref(orig_node);
2841 static void batadv_tt_update_changes(struct batadv_priv *bat_priv,
2842 struct batadv_orig_node *orig_node,
2843 uint16_t tt_num_changes, uint8_t ttvn,
2844 struct batadv_tvlv_tt_change *tt_change)
2846 _batadv_tt_update_changes(bat_priv, orig_node, tt_change,
2847 tt_num_changes, ttvn);
2849 batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change,
2850 batadv_tt_len(tt_num_changes));
2851 atomic_set(&orig_node->last_ttvn, ttvn);
2855 * batadv_is_my_client - check if a client is served by the local node
2856 * @bat_priv: the bat priv with all the soft interface information
2857 * @addr: the mac adress of the client to check
2858 * @vid: VLAN identifier
2860 * Returns true if the client is served by this node, false otherwise.
2862 bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr,
2865 struct batadv_tt_local_entry *tt_local_entry;
2868 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
2869 if (!tt_local_entry)
2871 /* Check if the client has been logically deleted (but is kept for
2872 * consistency purpose)
2874 if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) ||
2875 (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM))
2880 batadv_tt_local_entry_free_ref(tt_local_entry);
2885 * batadv_handle_tt_response - process incoming tt reply
2886 * @bat_priv: the bat priv with all the soft interface information
2887 * @tt_data: tt data containing the tt request information
2888 * @resp_src: mac address of tt reply sender
2889 * @num_entries: number of tt change entries appended to the tt data
2891 static void batadv_handle_tt_response(struct batadv_priv *bat_priv,
2892 struct batadv_tvlv_tt_data *tt_data,
2893 uint8_t *resp_src, uint16_t num_entries)
2895 struct batadv_tt_req_node *node, *safe;
2896 struct batadv_orig_node *orig_node = NULL;
2897 struct batadv_tvlv_tt_change *tt_change;
2898 uint8_t *tvlv_ptr = (uint8_t *)tt_data;
2899 uint16_t change_offset;
2901 batadv_dbg(BATADV_DBG_TT, bat_priv,
2902 "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
2903 resp_src, tt_data->ttvn, num_entries,
2904 (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.'));
2906 orig_node = batadv_orig_hash_find(bat_priv, resp_src);
2910 spin_lock_bh(&orig_node->tt_lock);
2912 change_offset = sizeof(struct batadv_tvlv_tt_vlan_data);
2913 change_offset *= ntohs(tt_data->num_vlan);
2914 change_offset += sizeof(*tt_data);
2915 tvlv_ptr += change_offset;
2917 tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr;
2918 if (tt_data->flags & BATADV_TT_FULL_TABLE) {
2919 batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn,
2920 resp_src, num_entries);
2922 batadv_tt_update_changes(bat_priv, orig_node, num_entries,
2923 tt_data->ttvn, tt_change);
2926 /* Recalculate the CRC for this orig_node and store it */
2927 batadv_tt_global_update_crc(bat_priv, orig_node);
2929 spin_unlock_bh(&orig_node->tt_lock);
2931 /* Delete the tt_req_node from pending tt_requests list */
2932 spin_lock_bh(&bat_priv->tt.req_list_lock);
2933 list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
2934 if (!batadv_compare_eth(node->addr, resp_src))
2936 list_del(&node->list);
2940 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2943 batadv_orig_node_free_ref(orig_node);
2946 static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv)
2948 struct batadv_tt_roam_node *node, *safe;
2950 spin_lock_bh(&bat_priv->tt.roam_list_lock);
2952 list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) {
2953 list_del(&node->list);
2957 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
2960 static void batadv_tt_roam_purge(struct batadv_priv *bat_priv)
2962 struct batadv_tt_roam_node *node, *safe;
2964 spin_lock_bh(&bat_priv->tt.roam_list_lock);
2965 list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) {
2966 if (!batadv_has_timed_out(node->first_time,
2967 BATADV_ROAMING_MAX_TIME))
2970 list_del(&node->list);
2973 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
2976 /* This function checks whether the client already reached the
2977 * maximum number of possible roaming phases. In this case the ROAMING_ADV
2980 * returns true if the ROAMING_ADV can be sent, false otherwise
2982 static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv,
2985 struct batadv_tt_roam_node *tt_roam_node;
2988 spin_lock_bh(&bat_priv->tt.roam_list_lock);
2989 /* The new tt_req will be issued only if I'm not waiting for a
2990 * reply from the same orig_node yet
2992 list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) {
2993 if (!batadv_compare_eth(tt_roam_node->addr, client))
2996 if (batadv_has_timed_out(tt_roam_node->first_time,
2997 BATADV_ROAMING_MAX_TIME))
3000 if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter))
3001 /* Sorry, you roamed too many times! */
3008 tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC);
3012 tt_roam_node->first_time = jiffies;
3013 atomic_set(&tt_roam_node->counter,
3014 BATADV_ROAMING_MAX_COUNT - 1);
3015 ether_addr_copy(tt_roam_node->addr, client);
3017 list_add(&tt_roam_node->list, &bat_priv->tt.roam_list);
3022 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3027 * batadv_send_roam_adv - send a roaming advertisement message
3028 * @bat_priv: the bat priv with all the soft interface information
3029 * @client: mac address of the roaming client
3030 * @vid: VLAN identifier
3031 * @orig_node: message destination
3033 * Send a ROAMING_ADV message to the node which was previously serving this
3034 * client. This is done to inform the node that from now on all traffic destined
3035 * for this particular roamed client has to be forwarded to the sender of the
3038 static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client,
3040 struct batadv_orig_node *orig_node)
3042 struct batadv_hard_iface *primary_if;
3043 struct batadv_tvlv_roam_adv tvlv_roam;
3045 primary_if = batadv_primary_if_get_selected(bat_priv);
3049 /* before going on we have to check whether the client has
3050 * already roamed to us too many times
3052 if (!batadv_tt_check_roam_count(bat_priv, client))
3055 batadv_dbg(BATADV_DBG_TT, bat_priv,
3056 "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n",
3057 orig_node->orig, client, BATADV_PRINT_VID(vid));
3059 batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX);
3061 memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client));
3062 tvlv_roam.vid = htons(vid);
3064 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3065 orig_node->orig, BATADV_TVLV_ROAM, 1,
3066 &tvlv_roam, sizeof(tvlv_roam));
3070 batadv_hardif_free_ref(primary_if);
3073 static void batadv_tt_purge(struct work_struct *work)
3075 struct delayed_work *delayed_work;
3076 struct batadv_priv_tt *priv_tt;
3077 struct batadv_priv *bat_priv;
3079 delayed_work = container_of(work, struct delayed_work, work);
3080 priv_tt = container_of(delayed_work, struct batadv_priv_tt, work);
3081 bat_priv = container_of(priv_tt, struct batadv_priv, tt);
3083 batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT);
3084 batadv_tt_global_purge(bat_priv);
3085 batadv_tt_req_purge(bat_priv);
3086 batadv_tt_roam_purge(bat_priv);
3088 queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
3089 msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
3092 void batadv_tt_free(struct batadv_priv *bat_priv)
3094 batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1);
3095 batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1);
3097 cancel_delayed_work_sync(&bat_priv->tt.work);
3099 batadv_tt_local_table_free(bat_priv);
3100 batadv_tt_global_table_free(bat_priv);
3101 batadv_tt_req_list_free(bat_priv);
3102 batadv_tt_changes_list_free(bat_priv);
3103 batadv_tt_roam_list_free(bat_priv);
3105 kfree(bat_priv->tt.last_changeset);
3109 * batadv_tt_local_set_flags - set or unset the specified flags on the local
3110 * table and possibly count them in the TT size
3111 * @bat_priv: the bat priv with all the soft interface information
3112 * @flags: the flag to switch
3113 * @enable: whether to set or unset the flag
3114 * @count: whether to increase the TT size by the number of changed entries
3116 static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv,
3117 uint16_t flags, bool enable, bool count)
3119 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
3120 struct batadv_tt_common_entry *tt_common_entry;
3121 uint16_t changed_num = 0;
3122 struct hlist_head *head;
3128 for (i = 0; i < hash->size; i++) {
3129 head = &hash->table[i];
3132 hlist_for_each_entry_rcu(tt_common_entry,
3135 if ((tt_common_entry->flags & flags) == flags)
3137 tt_common_entry->flags |= flags;
3139 if (!(tt_common_entry->flags & flags))
3141 tt_common_entry->flags &= ~flags;
3148 batadv_tt_local_size_inc(bat_priv,
3149 tt_common_entry->vid);
3155 /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */
3156 static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv)
3158 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
3159 struct batadv_tt_common_entry *tt_common;
3160 struct batadv_tt_local_entry *tt_local;
3161 struct batadv_softif_vlan *vlan;
3162 struct hlist_node *node_tmp;
3163 struct hlist_head *head;
3164 spinlock_t *list_lock; /* protects write access to the hash lists */
3170 for (i = 0; i < hash->size; i++) {
3171 head = &hash->table[i];
3172 list_lock = &hash->list_locks[i];
3174 spin_lock_bh(list_lock);
3175 hlist_for_each_entry_safe(tt_common, node_tmp, head,
3177 if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING))
3180 batadv_dbg(BATADV_DBG_TT, bat_priv,
3181 "Deleting local tt entry (%pM, vid: %d): pending\n",
3183 BATADV_PRINT_VID(tt_common->vid));
3185 batadv_tt_local_size_dec(bat_priv, tt_common->vid);
3186 hlist_del_rcu(&tt_common->hash_entry);
3187 tt_local = container_of(tt_common,
3188 struct batadv_tt_local_entry,
3191 /* decrease the reference held for this vlan */
3192 vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid);
3193 batadv_softif_vlan_free_ref(vlan);
3194 batadv_softif_vlan_free_ref(vlan);
3196 batadv_tt_local_entry_free_ref(tt_local);
3198 spin_unlock_bh(list_lock);
3203 * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes
3204 * which have been queued in the time since the last commit
3205 * @bat_priv: the bat priv with all the soft interface information
3207 * Caller must hold tt->commit_lock.
3209 static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv)
3211 /* Update multicast addresses in local translation table */
3212 batadv_mcast_mla_update(bat_priv);
3214 if (atomic_read(&bat_priv->tt.local_changes) < 1) {
3215 if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt))
3216 batadv_tt_tvlv_container_update(bat_priv);
3220 batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true);
3222 batadv_tt_local_purge_pending_clients(bat_priv);
3223 batadv_tt_local_update_crc(bat_priv);
3225 /* Increment the TTVN only once per OGM interval */
3226 atomic_inc(&bat_priv->tt.vn);
3227 batadv_dbg(BATADV_DBG_TT, bat_priv,
3228 "Local changes committed, updating to ttvn %u\n",
3229 (uint8_t)atomic_read(&bat_priv->tt.vn));
3231 /* reset the sending counter */
3232 atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX);
3233 batadv_tt_tvlv_container_update(bat_priv);
3237 * batadv_tt_local_commit_changes - commit all pending local tt changes which
3238 * have been queued in the time since the last commit
3239 * @bat_priv: the bat priv with all the soft interface information
3241 void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv)
3243 spin_lock_bh(&bat_priv->tt.commit_lock);
3244 batadv_tt_local_commit_changes_nolock(bat_priv);
3245 spin_unlock_bh(&bat_priv->tt.commit_lock);
3248 bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src,
3249 uint8_t *dst, unsigned short vid)
3251 struct batadv_tt_local_entry *tt_local_entry = NULL;
3252 struct batadv_tt_global_entry *tt_global_entry = NULL;
3253 struct batadv_softif_vlan *vlan;
3256 vlan = batadv_softif_vlan_get(bat_priv, vid);
3257 if (!vlan || !atomic_read(&vlan->ap_isolation))
3260 tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid);
3261 if (!tt_local_entry)
3264 tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid);
3265 if (!tt_global_entry)
3268 if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry))
3275 batadv_softif_vlan_free_ref(vlan);
3276 if (tt_global_entry)
3277 batadv_tt_global_entry_free_ref(tt_global_entry);
3279 batadv_tt_local_entry_free_ref(tt_local_entry);
3284 * batadv_tt_update_orig - update global translation table with new tt
3285 * information received via ogms
3286 * @bat_priv: the bat priv with all the soft interface information
3287 * @orig: the orig_node of the ogm
3288 * @tt_vlan: pointer to the first tvlv VLAN entry
3289 * @tt_num_vlan: number of tvlv VLAN entries
3290 * @tt_change: pointer to the first entry in the TT buffer
3291 * @tt_num_changes: number of tt changes inside the tt buffer
3292 * @ttvn: translation table version number of this changeset
3293 * @tt_crc: crc32 checksum of orig node's translation table
3295 static void batadv_tt_update_orig(struct batadv_priv *bat_priv,
3296 struct batadv_orig_node *orig_node,
3297 const void *tt_buff, uint16_t tt_num_vlan,
3298 struct batadv_tvlv_tt_change *tt_change,
3299 uint16_t tt_num_changes, uint8_t ttvn)
3301 uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
3302 struct batadv_tvlv_tt_vlan_data *tt_vlan;
3303 bool full_table = true;
3306 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff;
3307 has_tt_init = orig_node->capa_initialized & BATADV_ORIG_CAPA_HAS_TT;
3309 /* orig table not initialised AND first diff is in the OGM OR the ttvn
3310 * increased by one -> we can apply the attached changes
3312 if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) {
3313 /* the OGM could not contain the changes due to their size or
3314 * because they have already been sent BATADV_TT_OGM_APPEND_MAX
3316 * In this case send a tt request
3318 if (!tt_num_changes) {
3323 spin_lock_bh(&orig_node->tt_lock);
3325 batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes,
3328 /* Even if we received the precomputed crc with the OGM, we
3329 * prefer to recompute it to spot any possible inconsistency
3330 * in the global table
3332 batadv_tt_global_update_crc(bat_priv, orig_node);
3334 spin_unlock_bh(&orig_node->tt_lock);
3336 /* The ttvn alone is not enough to guarantee consistency
3337 * because a single value could represent different states
3338 * (due to the wrap around). Thus a node has to check whether
3339 * the resulting table (after applying the changes) is still
3340 * consistent or not. E.g. a node could disconnect while its
3341 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
3342 * checking the CRC value is mandatory to detect the
3345 if (!batadv_tt_global_check_crc(orig_node, tt_vlan,
3349 /* if we missed more than one change or our tables are not
3350 * in sync anymore -> request fresh tt data
3352 if (!has_tt_init || ttvn != orig_ttvn ||
3353 !batadv_tt_global_check_crc(orig_node, tt_vlan,
3356 batadv_dbg(BATADV_DBG_TT, bat_priv,
3357 "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n",
3358 orig_node->orig, ttvn, orig_ttvn,
3360 batadv_send_tt_request(bat_priv, orig_node, ttvn,
3361 tt_vlan, tt_num_vlan,
3369 * batadv_tt_global_client_is_roaming - check if a client is marked as roaming
3370 * @bat_priv: the bat priv with all the soft interface information
3371 * @addr: the mac address of the client to check
3372 * @vid: VLAN identifier
3374 * Returns true if we know that the client has moved from its old originator
3375 * to another one. This entry is still kept for consistency purposes and will be
3376 * deleted later by a DEL or because of timeout
3378 bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv,
3379 uint8_t *addr, unsigned short vid)
3381 struct batadv_tt_global_entry *tt_global_entry;
3384 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
3385 if (!tt_global_entry)
3388 ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM;
3389 batadv_tt_global_entry_free_ref(tt_global_entry);
3395 * batadv_tt_local_client_is_roaming - tells whether the client is roaming
3396 * @bat_priv: the bat priv with all the soft interface information
3397 * @addr: the mac address of the local client to query
3398 * @vid: VLAN identifier
3400 * Returns true if the local client is known to be roaming (it is not served by
3401 * this node anymore) or not. If yes, the client is still present in the table
3402 * to keep the latter consistent with the node TTVN
3404 bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv,
3405 uint8_t *addr, unsigned short vid)
3407 struct batadv_tt_local_entry *tt_local_entry;
3410 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
3411 if (!tt_local_entry)
3414 ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM;
3415 batadv_tt_local_entry_free_ref(tt_local_entry);
3420 bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv,
3421 struct batadv_orig_node *orig_node,
3422 const unsigned char *addr,
3427 if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid,
3428 BATADV_TT_CLIENT_TEMP,
3429 atomic_read(&orig_node->last_ttvn)))
3432 batadv_dbg(BATADV_DBG_TT, bat_priv,
3433 "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n",
3434 addr, BATADV_PRINT_VID(vid), orig_node->orig);
3441 * batadv_tt_local_resize_to_mtu - resize the local translation table fit the
3442 * maximum packet size that can be transported through the mesh
3443 * @soft_iface: netdev struct of the mesh interface
3445 * Remove entries older than 'timeout' and half timeout if more entries need
3448 void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface)
3450 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
3451 int packet_size_max = atomic_read(&bat_priv->packet_size_max);
3452 int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2;
3453 bool reduced = false;
3455 spin_lock_bh(&bat_priv->tt.commit_lock);
3458 table_size = batadv_tt_local_table_transmit_size(bat_priv);
3459 if (packet_size_max >= table_size)
3462 batadv_tt_local_purge(bat_priv, timeout);
3463 batadv_tt_local_purge_pending_clients(bat_priv);
3467 net_ratelimited_function(batadv_info, soft_iface,
3468 "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n",
3472 /* commit these changes immediately, to avoid synchronization problem
3476 batadv_tt_local_commit_changes_nolock(bat_priv);
3478 spin_unlock_bh(&bat_priv->tt.commit_lock);
3482 * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container
3483 * @bat_priv: the bat priv with all the soft interface information
3484 * @orig: the orig_node of the ogm
3485 * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
3486 * @tvlv_value: tvlv buffer containing the gateway data
3487 * @tvlv_value_len: tvlv buffer length
3489 static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,
3490 struct batadv_orig_node *orig,
3491 uint8_t flags, void *tvlv_value,
3492 uint16_t tvlv_value_len)
3494 struct batadv_tvlv_tt_vlan_data *tt_vlan;
3495 struct batadv_tvlv_tt_change *tt_change;
3496 struct batadv_tvlv_tt_data *tt_data;
3497 uint16_t num_entries, num_vlan;
3499 if (tvlv_value_len < sizeof(*tt_data))
3502 tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
3503 tvlv_value_len -= sizeof(*tt_data);
3505 num_vlan = ntohs(tt_data->num_vlan);
3507 if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan)
3510 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
3511 tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan);
3512 tvlv_value_len -= sizeof(*tt_vlan) * num_vlan;
3514 num_entries = batadv_tt_entries(tvlv_value_len);
3516 batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change,
3517 num_entries, tt_data->ttvn);
3521 * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv
3523 * @bat_priv: the bat priv with all the soft interface information
3524 * @src: mac address of tt tvlv sender
3525 * @dst: mac address of tt tvlv recipient
3526 * @tvlv_value: tvlv buffer containing the tt data
3527 * @tvlv_value_len: tvlv buffer length
3529 * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS
3532 static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
3533 uint8_t *src, uint8_t *dst,
3535 uint16_t tvlv_value_len)
3537 struct batadv_tvlv_tt_data *tt_data;
3538 uint16_t tt_vlan_len, tt_num_entries;
3542 if (tvlv_value_len < sizeof(*tt_data))
3543 return NET_RX_SUCCESS;
3545 tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
3546 tvlv_value_len -= sizeof(*tt_data);
3548 tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data);
3549 tt_vlan_len *= ntohs(tt_data->num_vlan);
3551 if (tvlv_value_len < tt_vlan_len)
3552 return NET_RX_SUCCESS;
3554 tvlv_value_len -= tt_vlan_len;
3555 tt_num_entries = batadv_tt_entries(tvlv_value_len);
3557 switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) {
3558 case BATADV_TT_REQUEST:
3559 batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX);
3561 /* If this node cannot provide a TT response the tt_request is
3564 ret = batadv_send_tt_response(bat_priv, tt_data, src, dst);
3566 if (tt_data->flags & BATADV_TT_FULL_TABLE)
3571 batadv_dbg(BATADV_DBG_TT, bat_priv,
3572 "Routing TT_REQUEST to %pM [%c]\n",
3574 /* tvlv API will re-route the packet */
3578 case BATADV_TT_RESPONSE:
3579 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX);
3581 if (batadv_is_my_mac(bat_priv, dst)) {
3582 batadv_handle_tt_response(bat_priv, tt_data,
3583 src, tt_num_entries);
3584 return NET_RX_SUCCESS;
3587 if (tt_data->flags & BATADV_TT_FULL_TABLE)
3592 batadv_dbg(BATADV_DBG_TT, bat_priv,
3593 "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag);
3595 /* tvlv API will re-route the packet */
3599 return NET_RX_SUCCESS;
3603 * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container
3604 * @bat_priv: the bat priv with all the soft interface information
3605 * @src: mac address of tt tvlv sender
3606 * @dst: mac address of tt tvlv recipient
3607 * @tvlv_value: tvlv buffer containing the tt data
3608 * @tvlv_value_len: tvlv buffer length
3610 * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS
3613 static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
3614 uint8_t *src, uint8_t *dst,
3616 uint16_t tvlv_value_len)
3618 struct batadv_tvlv_roam_adv *roaming_adv;
3619 struct batadv_orig_node *orig_node = NULL;
3621 /* If this node is not the intended recipient of the
3622 * roaming advertisement the packet is forwarded
3623 * (the tvlv API will re-route the packet).
3625 if (!batadv_is_my_mac(bat_priv, dst))
3628 if (tvlv_value_len < sizeof(*roaming_adv))
3631 orig_node = batadv_orig_hash_find(bat_priv, src);
3635 batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX);
3636 roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value;
3638 batadv_dbg(BATADV_DBG_TT, bat_priv,
3639 "Received ROAMING_ADV from %pM (client %pM)\n",
3640 src, roaming_adv->client);
3642 batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client,
3643 ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM,
3644 atomic_read(&orig_node->last_ttvn) + 1);
3648 batadv_orig_node_free_ref(orig_node);
3649 return NET_RX_SUCCESS;
3653 * batadv_tt_init - initialise the translation table internals
3654 * @bat_priv: the bat priv with all the soft interface information
3656 * Return 0 on success or negative error number in case of failure.
3658 int batadv_tt_init(struct batadv_priv *bat_priv)
3662 /* synchronized flags must be remote */
3663 BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK));
3665 ret = batadv_tt_local_init(bat_priv);
3669 ret = batadv_tt_global_init(bat_priv);
3673 batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1,
3674 batadv_tt_tvlv_unicast_handler_v1,
3675 BATADV_TVLV_TT, 1, BATADV_NO_FLAGS);
3677 batadv_tvlv_handler_register(bat_priv, NULL,
3678 batadv_roam_tvlv_unicast_handler_v1,
3679 BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS);
3681 INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge);
3682 queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
3683 msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
3689 * batadv_tt_global_is_isolated - check if a client is marked as isolated
3690 * @bat_priv: the bat priv with all the soft interface information
3691 * @addr: the mac address of the client
3692 * @vid: the identifier of the VLAN where this client is connected
3694 * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false
3697 bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv,
3698 const uint8_t *addr, unsigned short vid)
3700 struct batadv_tt_global_entry *tt;
3703 tt = batadv_tt_global_hash_find(bat_priv, addr, vid);
3707 ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA;
3709 batadv_tt_global_entry_free_ref(tt);