1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2007-2018 B.A.T.M.A.N. contributors:
4 * Marek Lindner, Simon Wunderlich, Antonio Quartulli
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 #include "translation-table.h"
22 #include <linux/atomic.h>
23 #include <linux/bitops.h>
24 #include <linux/build_bug.h>
25 #include <linux/byteorder/generic.h>
26 #include <linux/cache.h>
27 #include <linux/compiler.h>
28 #include <linux/crc32c.h>
29 #include <linux/errno.h>
30 #include <linux/etherdevice.h>
31 #include <linux/gfp.h>
32 #include <linux/if_ether.h>
33 #include <linux/init.h>
34 #include <linux/jhash.h>
35 #include <linux/jiffies.h>
36 #include <linux/kernel.h>
37 #include <linux/kref.h>
38 #include <linux/list.h>
39 #include <linux/lockdep.h>
40 #include <linux/net.h>
41 #include <linux/netdevice.h>
42 #include <linux/netlink.h>
43 #include <linux/rculist.h>
44 #include <linux/rcupdate.h>
45 #include <linux/seq_file.h>
46 #include <linux/skbuff.h>
47 #include <linux/slab.h>
48 #include <linux/spinlock.h>
49 #include <linux/stddef.h>
50 #include <linux/string.h>
51 #include <linux/workqueue.h>
52 #include <net/genetlink.h>
53 #include <net/netlink.h>
55 #include <uapi/linux/batadv_packet.h>
56 #include <uapi/linux/batman_adv.h>
58 #include "bridge_loop_avoidance.h"
59 #include "hard-interface.h"
63 #include "originator.h"
64 #include "soft-interface.h"
67 static struct kmem_cache *batadv_tl_cache __read_mostly;
68 static struct kmem_cache *batadv_tg_cache __read_mostly;
69 static struct kmem_cache *batadv_tt_orig_cache __read_mostly;
70 static struct kmem_cache *batadv_tt_change_cache __read_mostly;
71 static struct kmem_cache *batadv_tt_req_cache __read_mostly;
72 static struct kmem_cache *batadv_tt_roam_cache __read_mostly;
75 static struct lock_class_key batadv_tt_local_hash_lock_class_key;
76 static struct lock_class_key batadv_tt_global_hash_lock_class_key;
78 static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client,
80 struct batadv_orig_node *orig_node);
81 static void batadv_tt_purge(struct work_struct *work);
83 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry);
84 static void batadv_tt_global_del(struct batadv_priv *bat_priv,
85 struct batadv_orig_node *orig_node,
86 const unsigned char *addr,
87 unsigned short vid, const char *message,
91 * batadv_compare_tt() - check if two TT entries are the same
92 * @node: the list element pointer of the first TT entry
93 * @data2: pointer to the tt_common_entry of the second TT entry
95 * Compare the MAC address and the VLAN ID of the two TT entries and check if
96 * they are the same TT client.
97 * Return: true if the two TT clients are the same, false otherwise
99 static bool batadv_compare_tt(const struct hlist_node *node, const void *data2)
101 const void *data1 = container_of(node, struct batadv_tt_common_entry,
103 const struct batadv_tt_common_entry *tt1 = data1;
104 const struct batadv_tt_common_entry *tt2 = data2;
106 return (tt1->vid == tt2->vid) && batadv_compare_eth(data1, data2);
110 * batadv_choose_tt() - return the index of the tt entry in the hash table
111 * @data: pointer to the tt_common_entry object to map
112 * @size: the size of the hash table
114 * Return: the hash index where the object represented by 'data' should be
117 static inline u32 batadv_choose_tt(const void *data, u32 size)
119 struct batadv_tt_common_entry *tt;
122 tt = (struct batadv_tt_common_entry *)data;
123 hash = jhash(&tt->addr, ETH_ALEN, hash);
124 hash = jhash(&tt->vid, sizeof(tt->vid), hash);
130 * batadv_tt_hash_find() - look for a client in the given hash table
131 * @hash: the hash table to search
132 * @addr: the mac address of the client to look for
133 * @vid: VLAN identifier
135 * Return: a pointer to the tt_common struct belonging to the searched client if
136 * found, NULL otherwise.
138 static struct batadv_tt_common_entry *
139 batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr,
142 struct hlist_head *head;
143 struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL;
149 ether_addr_copy(to_search.addr, addr);
152 index = batadv_choose_tt(&to_search, hash->size);
153 head = &hash->table[index];
156 hlist_for_each_entry_rcu(tt, head, hash_entry) {
157 if (!batadv_compare_eth(tt, addr))
163 if (!kref_get_unless_zero(&tt->refcount))
175 * batadv_tt_local_hash_find() - search the local table for a given client
176 * @bat_priv: the bat priv with all the soft interface information
177 * @addr: the mac address of the client to look for
178 * @vid: VLAN identifier
180 * Return: a pointer to the corresponding tt_local_entry struct if the client is
181 * found, NULL otherwise.
183 static struct batadv_tt_local_entry *
184 batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr,
187 struct batadv_tt_common_entry *tt_common_entry;
188 struct batadv_tt_local_entry *tt_local_entry = NULL;
190 tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr,
193 tt_local_entry = container_of(tt_common_entry,
194 struct batadv_tt_local_entry,
196 return tt_local_entry;
200 * batadv_tt_global_hash_find() - search the global table for a given client
201 * @bat_priv: the bat priv with all the soft interface information
202 * @addr: the mac address of the client to look for
203 * @vid: VLAN identifier
205 * Return: a pointer to the corresponding tt_global_entry struct if the client
206 * is found, NULL otherwise.
208 static struct batadv_tt_global_entry *
209 batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr,
212 struct batadv_tt_common_entry *tt_common_entry;
213 struct batadv_tt_global_entry *tt_global_entry = NULL;
215 tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr,
218 tt_global_entry = container_of(tt_common_entry,
219 struct batadv_tt_global_entry,
221 return tt_global_entry;
225 * batadv_tt_local_entry_free_rcu() - free the tt_local_entry
226 * @rcu: rcu pointer of the tt_local_entry
228 static void batadv_tt_local_entry_free_rcu(struct rcu_head *rcu)
230 struct batadv_tt_local_entry *tt_local_entry;
232 tt_local_entry = container_of(rcu, struct batadv_tt_local_entry,
235 kmem_cache_free(batadv_tl_cache, tt_local_entry);
239 * batadv_tt_local_entry_release() - release tt_local_entry from lists and queue
240 * for free after rcu grace period
241 * @ref: kref pointer of the nc_node
243 static void batadv_tt_local_entry_release(struct kref *ref)
245 struct batadv_tt_local_entry *tt_local_entry;
247 tt_local_entry = container_of(ref, struct batadv_tt_local_entry,
250 batadv_softif_vlan_put(tt_local_entry->vlan);
252 call_rcu(&tt_local_entry->common.rcu, batadv_tt_local_entry_free_rcu);
256 * batadv_tt_local_entry_put() - decrement the tt_local_entry refcounter and
257 * possibly release it
258 * @tt_local_entry: tt_local_entry to be free'd
261 batadv_tt_local_entry_put(struct batadv_tt_local_entry *tt_local_entry)
263 kref_put(&tt_local_entry->common.refcount,
264 batadv_tt_local_entry_release);
268 * batadv_tt_global_entry_free_rcu() - free the tt_global_entry
269 * @rcu: rcu pointer of the tt_global_entry
271 static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu)
273 struct batadv_tt_global_entry *tt_global_entry;
275 tt_global_entry = container_of(rcu, struct batadv_tt_global_entry,
278 kmem_cache_free(batadv_tg_cache, tt_global_entry);
282 * batadv_tt_global_entry_release() - release tt_global_entry from lists and
283 * queue for free after rcu grace period
284 * @ref: kref pointer of the nc_node
286 static void batadv_tt_global_entry_release(struct kref *ref)
288 struct batadv_tt_global_entry *tt_global_entry;
290 tt_global_entry = container_of(ref, struct batadv_tt_global_entry,
293 batadv_tt_global_del_orig_list(tt_global_entry);
295 call_rcu(&tt_global_entry->common.rcu, batadv_tt_global_entry_free_rcu);
299 * batadv_tt_global_entry_put() - decrement the tt_global_entry refcounter and
300 * possibly release it
301 * @tt_global_entry: tt_global_entry to be free'd
304 batadv_tt_global_entry_put(struct batadv_tt_global_entry *tt_global_entry)
306 kref_put(&tt_global_entry->common.refcount,
307 batadv_tt_global_entry_release);
311 * batadv_tt_global_hash_count() - count the number of orig entries
312 * @bat_priv: the bat priv with all the soft interface information
313 * @addr: the mac address of the client to count entries for
314 * @vid: VLAN identifier
316 * Return: the number of originators advertising the given address/data
317 * (excluding ourself).
319 int batadv_tt_global_hash_count(struct batadv_priv *bat_priv,
320 const u8 *addr, unsigned short vid)
322 struct batadv_tt_global_entry *tt_global_entry;
325 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
326 if (!tt_global_entry)
329 count = atomic_read(&tt_global_entry->orig_list_count);
330 batadv_tt_global_entry_put(tt_global_entry);
336 * batadv_tt_local_size_mod() - change the size by v of the local table
338 * @bat_priv: the bat priv with all the soft interface information
339 * @vid: the VLAN identifier of the sub-table to change
340 * @v: the amount to sum to the local table size
342 static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv,
343 unsigned short vid, int v)
345 struct batadv_softif_vlan *vlan;
347 vlan = batadv_softif_vlan_get(bat_priv, vid);
351 atomic_add(v, &vlan->tt.num_entries);
353 batadv_softif_vlan_put(vlan);
357 * batadv_tt_local_size_inc() - increase by one the local table size for the
359 * @bat_priv: the bat priv with all the soft interface information
360 * @vid: the VLAN identifier
362 static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv,
365 batadv_tt_local_size_mod(bat_priv, vid, 1);
369 * batadv_tt_local_size_dec() - decrease by one the local table size for the
371 * @bat_priv: the bat priv with all the soft interface information
372 * @vid: the VLAN identifier
374 static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv,
377 batadv_tt_local_size_mod(bat_priv, vid, -1);
381 * batadv_tt_global_size_mod() - change the size by v of the global table
382 * for orig_node identified by vid
383 * @orig_node: the originator for which the table has to be modified
384 * @vid: the VLAN identifier
385 * @v: the amount to sum to the global table size
387 static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node,
388 unsigned short vid, int v)
390 struct batadv_orig_node_vlan *vlan;
392 vlan = batadv_orig_node_vlan_new(orig_node, vid);
396 if (atomic_add_return(v, &vlan->tt.num_entries) == 0) {
397 spin_lock_bh(&orig_node->vlan_list_lock);
398 if (!hlist_unhashed(&vlan->list)) {
399 hlist_del_init_rcu(&vlan->list);
400 batadv_orig_node_vlan_put(vlan);
402 spin_unlock_bh(&orig_node->vlan_list_lock);
405 batadv_orig_node_vlan_put(vlan);
409 * batadv_tt_global_size_inc() - increase by one the global table size for the
411 * @orig_node: the originator which global table size has to be decreased
412 * @vid: the vlan identifier
414 static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node,
417 batadv_tt_global_size_mod(orig_node, vid, 1);
421 * batadv_tt_global_size_dec() - decrease by one the global table size for the
423 * @orig_node: the originator which global table size has to be decreased
424 * @vid: the vlan identifier
426 static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node,
429 batadv_tt_global_size_mod(orig_node, vid, -1);
433 * batadv_tt_orig_list_entry_free_rcu() - free the orig_entry
434 * @rcu: rcu pointer of the orig_entry
436 static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu)
438 struct batadv_tt_orig_list_entry *orig_entry;
440 orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu);
442 kmem_cache_free(batadv_tt_orig_cache, orig_entry);
446 * batadv_tt_orig_list_entry_release() - release tt orig entry from lists and
447 * queue for free after rcu grace period
448 * @ref: kref pointer of the tt orig entry
450 static void batadv_tt_orig_list_entry_release(struct kref *ref)
452 struct batadv_tt_orig_list_entry *orig_entry;
454 orig_entry = container_of(ref, struct batadv_tt_orig_list_entry,
457 batadv_orig_node_put(orig_entry->orig_node);
458 call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu);
462 * batadv_tt_orig_list_entry_put() - decrement the tt orig entry refcounter and
463 * possibly release it
464 * @orig_entry: tt orig entry to be free'd
467 batadv_tt_orig_list_entry_put(struct batadv_tt_orig_list_entry *orig_entry)
469 kref_put(&orig_entry->refcount, batadv_tt_orig_list_entry_release);
473 * batadv_tt_local_event() - store a local TT event (ADD/DEL)
474 * @bat_priv: the bat priv with all the soft interface information
475 * @tt_local_entry: the TT entry involved in the event
476 * @event_flags: flags to store in the event structure
478 static void batadv_tt_local_event(struct batadv_priv *bat_priv,
479 struct batadv_tt_local_entry *tt_local_entry,
482 struct batadv_tt_change_node *tt_change_node, *entry, *safe;
483 struct batadv_tt_common_entry *common = &tt_local_entry->common;
484 u8 flags = common->flags | event_flags;
485 bool event_removed = false;
486 bool del_op_requested, del_op_entry;
488 tt_change_node = kmem_cache_alloc(batadv_tt_change_cache, GFP_ATOMIC);
492 tt_change_node->change.flags = flags;
493 memset(tt_change_node->change.reserved, 0,
494 sizeof(tt_change_node->change.reserved));
495 ether_addr_copy(tt_change_node->change.addr, common->addr);
496 tt_change_node->change.vid = htons(common->vid);
498 del_op_requested = flags & BATADV_TT_CLIENT_DEL;
500 /* check for ADD+DEL or DEL+ADD events */
501 spin_lock_bh(&bat_priv->tt.changes_list_lock);
502 list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
504 if (!batadv_compare_eth(entry->change.addr, common->addr))
507 /* DEL+ADD in the same orig interval have no effect and can be
508 * removed to avoid silly behaviour on the receiver side. The
509 * other way around (ADD+DEL) can happen in case of roaming of
510 * a client still in the NEW state. Roaming of NEW clients is
511 * now possible due to automatically recognition of "temporary"
514 del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL;
515 if (!del_op_requested && del_op_entry)
517 if (del_op_requested && !del_op_entry)
520 /* this is a second add in the same originator interval. It
521 * means that flags have been changed: update them!
523 if (!del_op_requested && !del_op_entry)
524 entry->change.flags = flags;
528 list_del(&entry->list);
529 kmem_cache_free(batadv_tt_change_cache, entry);
530 kmem_cache_free(batadv_tt_change_cache, tt_change_node);
531 event_removed = true;
535 /* track the change in the OGMinterval list */
536 list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list);
539 spin_unlock_bh(&bat_priv->tt.changes_list_lock);
542 atomic_dec(&bat_priv->tt.local_changes);
544 atomic_inc(&bat_priv->tt.local_changes);
548 * batadv_tt_len() - compute length in bytes of given number of tt changes
549 * @changes_num: number of tt changes
551 * Return: computed length in bytes.
553 static int batadv_tt_len(int changes_num)
555 return changes_num * sizeof(struct batadv_tvlv_tt_change);
559 * batadv_tt_entries() - compute the number of entries fitting in tt_len bytes
560 * @tt_len: available space
562 * Return: the number of entries.
564 static u16 batadv_tt_entries(u16 tt_len)
566 return tt_len / batadv_tt_len(1);
570 * batadv_tt_local_table_transmit_size() - calculates the local translation
571 * table size when transmitted over the air
572 * @bat_priv: the bat priv with all the soft interface information
574 * Return: local translation table size in bytes.
576 static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv)
579 u16 tt_local_entries = 0;
580 struct batadv_softif_vlan *vlan;
584 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
586 tt_local_entries += atomic_read(&vlan->tt.num_entries);
590 /* header size of tvlv encapsulated tt response payload */
591 hdr_size = sizeof(struct batadv_unicast_tvlv_packet);
592 hdr_size += sizeof(struct batadv_tvlv_hdr);
593 hdr_size += sizeof(struct batadv_tvlv_tt_data);
594 hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data);
596 return hdr_size + batadv_tt_len(tt_local_entries);
599 static int batadv_tt_local_init(struct batadv_priv *bat_priv)
601 if (bat_priv->tt.local_hash)
604 bat_priv->tt.local_hash = batadv_hash_new(1024);
606 if (!bat_priv->tt.local_hash)
609 batadv_hash_set_lock_class(bat_priv->tt.local_hash,
610 &batadv_tt_local_hash_lock_class_key);
615 static void batadv_tt_global_free(struct batadv_priv *bat_priv,
616 struct batadv_tt_global_entry *tt_global,
619 batadv_dbg(BATADV_DBG_TT, bat_priv,
620 "Deleting global tt entry %pM (vid: %d): %s\n",
621 tt_global->common.addr,
622 batadv_print_vid(tt_global->common.vid), message);
624 batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt,
625 batadv_choose_tt, &tt_global->common);
626 batadv_tt_global_entry_put(tt_global);
630 * batadv_tt_local_add() - add a new client to the local table or update an
632 * @soft_iface: netdev struct of the mesh interface
633 * @addr: the mac address of the client to add
634 * @vid: VLAN identifier
635 * @ifindex: index of the interface where the client is connected to (useful to
636 * identify wireless clients)
637 * @mark: the value contained in the skb->mark field of the received packet (if
640 * Return: true if the client was successfully added, false otherwise.
642 bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr,
643 unsigned short vid, int ifindex, u32 mark)
645 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
646 struct batadv_tt_local_entry *tt_local;
647 struct batadv_tt_global_entry *tt_global = NULL;
648 struct net *net = dev_net(soft_iface);
649 struct batadv_softif_vlan *vlan;
650 struct net_device *in_dev = NULL;
651 struct batadv_hard_iface *in_hardif = NULL;
652 struct hlist_head *head;
653 struct batadv_tt_orig_list_entry *orig_entry;
654 int hash_added, table_size, packet_size_max;
656 bool roamed_back = false;
660 if (ifindex != BATADV_NULL_IFINDEX)
661 in_dev = dev_get_by_index(net, ifindex);
664 in_hardif = batadv_hardif_get_by_netdev(in_dev);
666 tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid);
668 if (!is_multicast_ether_addr(addr))
669 tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid);
672 tt_local->last_seen = jiffies;
673 if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) {
674 batadv_dbg(BATADV_DBG_TT, bat_priv,
675 "Re-adding pending client %pM (vid: %d)\n",
676 addr, batadv_print_vid(vid));
677 /* whatever the reason why the PENDING flag was set,
678 * this is a client which was enqueued to be removed in
679 * this orig_interval. Since it popped up again, the
680 * flag can be reset like it was never enqueued
682 tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING;
686 if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) {
687 batadv_dbg(BATADV_DBG_TT, bat_priv,
688 "Roaming client %pM (vid: %d) came back to its original location\n",
689 addr, batadv_print_vid(vid));
690 /* the ROAM flag is set because this client roamed away
691 * and the node got a roaming_advertisement message. Now
692 * that the client popped up again at its original
693 * location such flag can be unset
695 tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM;
701 /* Ignore the client if we cannot send it in a full table response. */
702 table_size = batadv_tt_local_table_transmit_size(bat_priv);
703 table_size += batadv_tt_len(1);
704 packet_size_max = atomic_read(&bat_priv->packet_size_max);
705 if (table_size > packet_size_max) {
706 net_ratelimited_function(batadv_info, soft_iface,
707 "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n",
708 table_size, packet_size_max, addr);
712 tt_local = kmem_cache_alloc(batadv_tl_cache, GFP_ATOMIC);
716 /* increase the refcounter of the related vlan */
717 vlan = batadv_softif_vlan_get(bat_priv, vid);
719 net_ratelimited_function(batadv_info, soft_iface,
720 "adding TT local entry %pM to non-existent VLAN %d\n",
721 addr, batadv_print_vid(vid));
722 kmem_cache_free(batadv_tl_cache, tt_local);
727 batadv_dbg(BATADV_DBG_TT, bat_priv,
728 "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n",
729 addr, batadv_print_vid(vid),
730 (u8)atomic_read(&bat_priv->tt.vn));
732 ether_addr_copy(tt_local->common.addr, addr);
733 /* The local entry has to be marked as NEW to avoid to send it in
734 * a full table response going out before the next ttvn increment
735 * (consistency check)
737 tt_local->common.flags = BATADV_TT_CLIENT_NEW;
738 tt_local->common.vid = vid;
739 if (batadv_is_wifi_hardif(in_hardif))
740 tt_local->common.flags |= BATADV_TT_CLIENT_WIFI;
741 kref_init(&tt_local->common.refcount);
742 tt_local->last_seen = jiffies;
743 tt_local->common.added_at = tt_local->last_seen;
744 tt_local->vlan = vlan;
746 /* the batman interface mac and multicast addresses should never be
749 if (batadv_compare_eth(addr, soft_iface->dev_addr) ||
750 is_multicast_ether_addr(addr))
751 tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE;
753 kref_get(&tt_local->common.refcount);
754 hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt,
755 batadv_choose_tt, &tt_local->common,
756 &tt_local->common.hash_entry);
758 if (unlikely(hash_added != 0)) {
759 /* remove the reference for the hash */
760 batadv_tt_local_entry_put(tt_local);
765 batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS);
768 /* Check whether it is a roaming, but don't do anything if the roaming
769 * process has already been handled
771 if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) {
772 /* These node are probably going to update their tt table */
773 head = &tt_global->orig_list;
775 hlist_for_each_entry_rcu(orig_entry, head, list) {
776 batadv_send_roam_adv(bat_priv, tt_global->common.addr,
777 tt_global->common.vid,
778 orig_entry->orig_node);
782 batadv_tt_global_free(bat_priv, tt_global,
786 /* The global entry has to be marked as ROAMING and
787 * has to be kept for consistency purpose
789 tt_global->common.flags |= BATADV_TT_CLIENT_ROAM;
790 tt_global->roam_at = jiffies;
794 /* store the current remote flags before altering them. This helps
795 * understanding is flags are changing or not
797 remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK;
799 if (batadv_is_wifi_hardif(in_hardif))
800 tt_local->common.flags |= BATADV_TT_CLIENT_WIFI;
802 tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI;
804 /* check the mark in the skb: if it's equal to the configured
805 * isolation_mark, it means the packet is coming from an isolated
808 match_mark = (mark & bat_priv->isolation_mark_mask);
809 if (bat_priv->isolation_mark_mask &&
810 match_mark == bat_priv->isolation_mark)
811 tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA;
813 tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA;
815 /* if any "dynamic" flag has been modified, resend an ADD event for this
816 * entry so that all the nodes can get the new flags
818 if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK))
819 batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS);
824 batadv_hardif_put(in_hardif);
828 batadv_tt_local_entry_put(tt_local);
830 batadv_tt_global_entry_put(tt_global);
835 * batadv_tt_prepare_tvlv_global_data() - prepare the TVLV TT header to send
836 * within a TT Response directed to another node
837 * @orig_node: originator for which the TT data has to be prepared
838 * @tt_data: uninitialised pointer to the address of the TVLV buffer
839 * @tt_change: uninitialised pointer to the address of the area where the TT
840 * changed can be stored
841 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
842 * function reserves the amount of space needed to send the entire global TT
843 * table. In case of success the value is updated with the real amount of
845 * Allocate the needed amount of memory for the entire TT TVLV and write its
846 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
847 * objects, one per active VLAN served by the originator node.
849 * Return: the size of the allocated buffer or 0 in case of failure.
852 batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node,
853 struct batadv_tvlv_tt_data **tt_data,
854 struct batadv_tvlv_tt_change **tt_change,
861 struct batadv_tvlv_tt_vlan_data *tt_vlan;
862 struct batadv_orig_node_vlan *vlan;
865 spin_lock_bh(&orig_node->vlan_list_lock);
866 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
868 num_entries += atomic_read(&vlan->tt.num_entries);
871 change_offset = sizeof(**tt_data);
872 change_offset += num_vlan * sizeof(*tt_vlan);
874 /* if tt_len is negative, allocate the space needed by the full table */
876 *tt_len = batadv_tt_len(num_entries);
879 tvlv_len += change_offset;
881 *tt_data = kmalloc(tvlv_len, GFP_ATOMIC);
887 (*tt_data)->flags = BATADV_NO_FLAGS;
888 (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn);
889 (*tt_data)->num_vlan = htons(num_vlan);
891 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1);
892 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
893 tt_vlan->vid = htons(vlan->vid);
894 tt_vlan->crc = htonl(vlan->tt.crc);
899 tt_change_ptr = (u8 *)*tt_data + change_offset;
900 *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
903 spin_unlock_bh(&orig_node->vlan_list_lock);
908 * batadv_tt_prepare_tvlv_local_data() - allocate and prepare the TT TVLV for
910 * @bat_priv: the bat priv with all the soft interface information
911 * @tt_data: uninitialised pointer to the address of the TVLV buffer
912 * @tt_change: uninitialised pointer to the address of the area where the TT
913 * changes can be stored
914 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
915 * function reserves the amount of space needed to send the entire local TT
916 * table. In case of success the value is updated with the real amount of
919 * Allocate the needed amount of memory for the entire TT TVLV and write its
920 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
921 * objects, one per active VLAN.
923 * Return: the size of the allocated buffer or 0 in case of failure.
926 batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,
927 struct batadv_tvlv_tt_data **tt_data,
928 struct batadv_tvlv_tt_change **tt_change,
931 struct batadv_tvlv_tt_vlan_data *tt_vlan;
932 struct batadv_softif_vlan *vlan;
934 u16 vlan_entries = 0;
935 u16 total_entries = 0;
940 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
941 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
942 vlan_entries = atomic_read(&vlan->tt.num_entries);
943 if (vlan_entries < 1)
947 total_entries += vlan_entries;
950 change_offset = sizeof(**tt_data);
951 change_offset += num_vlan * sizeof(*tt_vlan);
953 /* if tt_len is negative, allocate the space needed by the full table */
955 *tt_len = batadv_tt_len(total_entries);
958 tvlv_len += change_offset;
960 *tt_data = kmalloc(tvlv_len, GFP_ATOMIC);
966 (*tt_data)->flags = BATADV_NO_FLAGS;
967 (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn);
968 (*tt_data)->num_vlan = htons(num_vlan);
970 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1);
971 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
972 vlan_entries = atomic_read(&vlan->tt.num_entries);
973 if (vlan_entries < 1)
976 tt_vlan->vid = htons(vlan->vid);
977 tt_vlan->crc = htonl(vlan->tt.crc);
982 tt_change_ptr = (u8 *)*tt_data + change_offset;
983 *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
986 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
991 * batadv_tt_tvlv_container_update() - update the translation table tvlv
992 * container after local tt changes have been committed
993 * @bat_priv: the bat priv with all the soft interface information
995 static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv)
997 struct batadv_tt_change_node *entry, *safe;
998 struct batadv_tvlv_tt_data *tt_data;
999 struct batadv_tvlv_tt_change *tt_change;
1000 int tt_diff_len, tt_change_len = 0;
1001 int tt_diff_entries_num = 0;
1002 int tt_diff_entries_count = 0;
1005 tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes);
1006 tt_diff_len = batadv_tt_len(tt_diff_entries_num);
1008 /* if we have too many changes for one packet don't send any
1009 * and wait for the tt table request which will be fragmented
1011 if (tt_diff_len > bat_priv->soft_iface->mtu)
1014 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data,
1015 &tt_change, &tt_diff_len);
1019 tt_data->flags = BATADV_TT_OGM_DIFF;
1021 if (tt_diff_len == 0)
1022 goto container_register;
1024 spin_lock_bh(&bat_priv->tt.changes_list_lock);
1025 atomic_set(&bat_priv->tt.local_changes, 0);
1027 list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
1029 if (tt_diff_entries_count < tt_diff_entries_num) {
1030 memcpy(tt_change + tt_diff_entries_count,
1032 sizeof(struct batadv_tvlv_tt_change));
1033 tt_diff_entries_count++;
1035 list_del(&entry->list);
1036 kmem_cache_free(batadv_tt_change_cache, entry);
1038 spin_unlock_bh(&bat_priv->tt.changes_list_lock);
1040 /* Keep the buffer for possible tt_request */
1041 spin_lock_bh(&bat_priv->tt.last_changeset_lock);
1042 kfree(bat_priv->tt.last_changeset);
1043 bat_priv->tt.last_changeset_len = 0;
1044 bat_priv->tt.last_changeset = NULL;
1045 tt_change_len = batadv_tt_len(tt_diff_entries_count);
1046 /* check whether this new OGM has no changes due to size problems */
1047 if (tt_diff_entries_count > 0) {
1048 /* if kmalloc() fails we will reply with the full table
1049 * instead of providing the diff
1051 bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC);
1052 if (bat_priv->tt.last_changeset) {
1053 memcpy(bat_priv->tt.last_changeset,
1054 tt_change, tt_change_len);
1055 bat_priv->tt.last_changeset_len = tt_diff_len;
1058 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
1061 batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data,
1066 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1069 * batadv_tt_local_seq_print_text() - Print the local tt table in a seq file
1070 * @seq: seq file to print on
1075 int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset)
1077 struct net_device *net_dev = (struct net_device *)seq->private;
1078 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1079 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
1080 struct batadv_tt_common_entry *tt_common_entry;
1081 struct batadv_tt_local_entry *tt_local;
1082 struct batadv_hard_iface *primary_if;
1083 struct hlist_head *head;
1086 int last_seen_msecs;
1087 unsigned long last_seen_jiffies;
1089 u16 np_flag = BATADV_TT_CLIENT_NOPURGE;
1091 primary_if = batadv_seq_print_text_primary_if_get(seq);
1096 "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n",
1097 net_dev->name, (u8)atomic_read(&bat_priv->tt.vn));
1099 " Client VID Flags Last seen (CRC )\n");
1101 for (i = 0; i < hash->size; i++) {
1102 head = &hash->table[i];
1105 hlist_for_each_entry_rcu(tt_common_entry,
1107 tt_local = container_of(tt_common_entry,
1108 struct batadv_tt_local_entry,
1110 last_seen_jiffies = jiffies - tt_local->last_seen;
1111 last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
1112 last_seen_secs = last_seen_msecs / 1000;
1113 last_seen_msecs = last_seen_msecs % 1000;
1115 no_purge = tt_common_entry->flags & np_flag;
1117 " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n",
1118 tt_common_entry->addr,
1119 batadv_print_vid(tt_common_entry->vid),
1120 ((tt_common_entry->flags &
1121 BATADV_TT_CLIENT_ROAM) ? 'R' : '.'),
1122 no_purge ? 'P' : '.',
1123 ((tt_common_entry->flags &
1124 BATADV_TT_CLIENT_NEW) ? 'N' : '.'),
1125 ((tt_common_entry->flags &
1126 BATADV_TT_CLIENT_PENDING) ? 'X' : '.'),
1127 ((tt_common_entry->flags &
1128 BATADV_TT_CLIENT_WIFI) ? 'W' : '.'),
1129 ((tt_common_entry->flags &
1130 BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'),
1131 no_purge ? 0 : last_seen_secs,
1132 no_purge ? 0 : last_seen_msecs,
1133 tt_local->vlan->tt.crc);
1139 batadv_hardif_put(primary_if);
1145 * batadv_tt_local_dump_entry() - Dump one TT local entry into a message
1146 * @msg :Netlink message to dump into
1147 * @portid: Port making netlink request
1148 * @seq: Sequence number of netlink message
1149 * @bat_priv: The bat priv with all the soft interface information
1150 * @common: tt local & tt global common data
1152 * Return: Error code, or 0 on success
1155 batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
1156 struct batadv_priv *bat_priv,
1157 struct batadv_tt_common_entry *common)
1160 struct batadv_softif_vlan *vlan;
1161 struct batadv_tt_local_entry *local;
1162 unsigned int last_seen_msecs;
1165 local = container_of(common, struct batadv_tt_local_entry, common);
1166 last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen);
1168 vlan = batadv_softif_vlan_get(bat_priv, common->vid);
1174 batadv_softif_vlan_put(vlan);
1176 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
1178 BATADV_CMD_GET_TRANSTABLE_LOCAL);
1182 if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) ||
1183 nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) ||
1184 nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) ||
1185 nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags))
1186 goto nla_put_failure;
1188 if (!(common->flags & BATADV_TT_CLIENT_NOPURGE) &&
1189 nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, last_seen_msecs))
1190 goto nla_put_failure;
1192 genlmsg_end(msg, hdr);
1196 genlmsg_cancel(msg, hdr);
1201 * batadv_tt_local_dump_bucket() - Dump one TT local bucket into a message
1202 * @msg: Netlink message to dump into
1203 * @portid: Port making netlink request
1204 * @seq: Sequence number of netlink message
1205 * @bat_priv: The bat priv with all the soft interface information
1206 * @head: Pointer to the list containing the local tt entries
1207 * @idx_s: Number of entries to skip
1209 * Return: Error code, or 0 on success
1212 batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq,
1213 struct batadv_priv *bat_priv,
1214 struct hlist_head *head, int *idx_s)
1216 struct batadv_tt_common_entry *common;
1220 hlist_for_each_entry_rcu(common, head, hash_entry) {
1224 if (batadv_tt_local_dump_entry(msg, portid, seq, bat_priv,
1238 * batadv_tt_local_dump() - Dump TT local entries into a message
1239 * @msg: Netlink message to dump into
1240 * @cb: Parameters from query
1242 * Return: Error code, or 0 on success
1244 int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb)
1246 struct net *net = sock_net(cb->skb->sk);
1247 struct net_device *soft_iface;
1248 struct batadv_priv *bat_priv;
1249 struct batadv_hard_iface *primary_if = NULL;
1250 struct batadv_hashtable *hash;
1251 struct hlist_head *head;
1254 int bucket = cb->args[0];
1255 int idx = cb->args[1];
1256 int portid = NETLINK_CB(cb->skb).portid;
1258 ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
1262 soft_iface = dev_get_by_index(net, ifindex);
1263 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
1268 bat_priv = netdev_priv(soft_iface);
1270 primary_if = batadv_primary_if_get_selected(bat_priv);
1271 if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
1276 hash = bat_priv->tt.local_hash;
1278 while (bucket < hash->size) {
1279 head = &hash->table[bucket];
1281 if (batadv_tt_local_dump_bucket(msg, portid, cb->nlh->nlmsg_seq,
1282 bat_priv, head, &idx))
1292 batadv_hardif_put(primary_if);
1294 dev_put(soft_iface);
1296 cb->args[0] = bucket;
1303 batadv_tt_local_set_pending(struct batadv_priv *bat_priv,
1304 struct batadv_tt_local_entry *tt_local_entry,
1305 u16 flags, const char *message)
1307 batadv_tt_local_event(bat_priv, tt_local_entry, flags);
1309 /* The local client has to be marked as "pending to be removed" but has
1310 * to be kept in the table in order to send it in a full table
1311 * response issued before the net ttvn increment (consistency check)
1313 tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING;
1315 batadv_dbg(BATADV_DBG_TT, bat_priv,
1316 "Local tt entry (%pM, vid: %d) pending to be removed: %s\n",
1317 tt_local_entry->common.addr,
1318 batadv_print_vid(tt_local_entry->common.vid), message);
1322 * batadv_tt_local_remove() - logically remove an entry from the local table
1323 * @bat_priv: the bat priv with all the soft interface information
1324 * @addr: the MAC address of the client to remove
1325 * @vid: VLAN identifier
1326 * @message: message to append to the log on deletion
1327 * @roaming: true if the deletion is due to a roaming event
1329 * Return: the flags assigned to the local entry before being deleted
1331 u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr,
1332 unsigned short vid, const char *message,
1335 struct batadv_tt_local_entry *tt_local_entry;
1336 u16 flags, curr_flags = BATADV_NO_FLAGS;
1337 void *tt_entry_exists;
1339 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
1340 if (!tt_local_entry)
1343 curr_flags = tt_local_entry->common.flags;
1345 flags = BATADV_TT_CLIENT_DEL;
1346 /* if this global entry addition is due to a roaming, the node has to
1347 * mark the local entry as "roamed" in order to correctly reroute
1351 flags |= BATADV_TT_CLIENT_ROAM;
1352 /* mark the local client as ROAMed */
1353 tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM;
1356 if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) {
1357 batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags,
1361 /* if this client has been added right now, it is possible to
1362 * immediately purge it
1364 batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL);
1366 tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash,
1369 &tt_local_entry->common);
1370 if (!tt_entry_exists)
1373 /* extra call to free the local tt entry */
1374 batadv_tt_local_entry_put(tt_local_entry);
1378 batadv_tt_local_entry_put(tt_local_entry);
1384 * batadv_tt_local_purge_list() - purge inactive tt local entries
1385 * @bat_priv: the bat priv with all the soft interface information
1386 * @head: pointer to the list containing the local tt entries
1387 * @timeout: parameter deciding whether a given tt local entry is considered
1390 static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv,
1391 struct hlist_head *head,
1394 struct batadv_tt_local_entry *tt_local_entry;
1395 struct batadv_tt_common_entry *tt_common_entry;
1396 struct hlist_node *node_tmp;
1398 hlist_for_each_entry_safe(tt_common_entry, node_tmp, head,
1400 tt_local_entry = container_of(tt_common_entry,
1401 struct batadv_tt_local_entry,
1403 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE)
1406 /* entry already marked for deletion */
1407 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)
1410 if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout))
1413 batadv_tt_local_set_pending(bat_priv, tt_local_entry,
1414 BATADV_TT_CLIENT_DEL, "timed out");
1419 * batadv_tt_local_purge() - purge inactive tt local entries
1420 * @bat_priv: the bat priv with all the soft interface information
1421 * @timeout: parameter deciding whether a given tt local entry is considered
1424 static void batadv_tt_local_purge(struct batadv_priv *bat_priv,
1427 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
1428 struct hlist_head *head;
1429 spinlock_t *list_lock; /* protects write access to the hash lists */
1432 for (i = 0; i < hash->size; i++) {
1433 head = &hash->table[i];
1434 list_lock = &hash->list_locks[i];
1436 spin_lock_bh(list_lock);
1437 batadv_tt_local_purge_list(bat_priv, head, timeout);
1438 spin_unlock_bh(list_lock);
1442 static void batadv_tt_local_table_free(struct batadv_priv *bat_priv)
1444 struct batadv_hashtable *hash;
1445 spinlock_t *list_lock; /* protects write access to the hash lists */
1446 struct batadv_tt_common_entry *tt_common_entry;
1447 struct batadv_tt_local_entry *tt_local;
1448 struct hlist_node *node_tmp;
1449 struct hlist_head *head;
1452 if (!bat_priv->tt.local_hash)
1455 hash = bat_priv->tt.local_hash;
1457 for (i = 0; i < hash->size; i++) {
1458 head = &hash->table[i];
1459 list_lock = &hash->list_locks[i];
1461 spin_lock_bh(list_lock);
1462 hlist_for_each_entry_safe(tt_common_entry, node_tmp,
1464 hlist_del_rcu(&tt_common_entry->hash_entry);
1465 tt_local = container_of(tt_common_entry,
1466 struct batadv_tt_local_entry,
1469 batadv_tt_local_entry_put(tt_local);
1471 spin_unlock_bh(list_lock);
1474 batadv_hash_destroy(hash);
1476 bat_priv->tt.local_hash = NULL;
1479 static int batadv_tt_global_init(struct batadv_priv *bat_priv)
1481 if (bat_priv->tt.global_hash)
1484 bat_priv->tt.global_hash = batadv_hash_new(1024);
1486 if (!bat_priv->tt.global_hash)
1489 batadv_hash_set_lock_class(bat_priv->tt.global_hash,
1490 &batadv_tt_global_hash_lock_class_key);
1495 static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv)
1497 struct batadv_tt_change_node *entry, *safe;
1499 spin_lock_bh(&bat_priv->tt.changes_list_lock);
1501 list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
1503 list_del(&entry->list);
1504 kmem_cache_free(batadv_tt_change_cache, entry);
1507 atomic_set(&bat_priv->tt.local_changes, 0);
1508 spin_unlock_bh(&bat_priv->tt.changes_list_lock);
1512 * batadv_tt_global_orig_entry_find() - find a TT orig_list_entry
1513 * @entry: the TT global entry where the orig_list_entry has to be
1515 * @orig_node: the originator for which the orig_list_entry has to be found
1517 * retrieve the orig_tt_list_entry belonging to orig_node from the
1518 * batadv_tt_global_entry list
1520 * Return: it with an increased refcounter, NULL if not found
1522 static struct batadv_tt_orig_list_entry *
1523 batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry,
1524 const struct batadv_orig_node *orig_node)
1526 struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL;
1527 const struct hlist_head *head;
1530 head = &entry->orig_list;
1531 hlist_for_each_entry_rcu(tmp_orig_entry, head, list) {
1532 if (tmp_orig_entry->orig_node != orig_node)
1534 if (!kref_get_unless_zero(&tmp_orig_entry->refcount))
1537 orig_entry = tmp_orig_entry;
1546 * batadv_tt_global_entry_has_orig() - check if a TT global entry is also
1547 * handled by a given originator
1548 * @entry: the TT global entry to check
1549 * @orig_node: the originator to search in the list
1550 * @flags: a pointer to store TT flags for the given @entry received
1553 * find out if an orig_node is already in the list of a tt_global_entry.
1555 * Return: true if found, false otherwise
1558 batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry,
1559 const struct batadv_orig_node *orig_node,
1562 struct batadv_tt_orig_list_entry *orig_entry;
1565 orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node);
1570 *flags = orig_entry->flags;
1572 batadv_tt_orig_list_entry_put(orig_entry);
1579 * batadv_tt_global_sync_flags() - update TT sync flags
1580 * @tt_global: the TT global entry to update sync flags in
1582 * Updates the sync flag bits in the tt_global flag attribute with a logical
1583 * OR of all sync flags from any of its TT orig entries.
1586 batadv_tt_global_sync_flags(struct batadv_tt_global_entry *tt_global)
1588 struct batadv_tt_orig_list_entry *orig_entry;
1589 const struct hlist_head *head;
1590 u16 flags = BATADV_NO_FLAGS;
1593 head = &tt_global->orig_list;
1594 hlist_for_each_entry_rcu(orig_entry, head, list)
1595 flags |= orig_entry->flags;
1598 flags |= tt_global->common.flags & (~BATADV_TT_SYNC_MASK);
1599 tt_global->common.flags = flags;
1603 * batadv_tt_global_orig_entry_add() - add or update a TT orig entry
1604 * @tt_global: the TT global entry to add an orig entry in
1605 * @orig_node: the originator to add an orig entry for
1606 * @ttvn: translation table version number of this changeset
1607 * @flags: TT sync flags
1610 batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global,
1611 struct batadv_orig_node *orig_node, int ttvn,
1614 struct batadv_tt_orig_list_entry *orig_entry;
1616 spin_lock_bh(&tt_global->list_lock);
1618 orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node);
1620 /* refresh the ttvn: the current value could be a bogus one that
1621 * was added during a "temporary client detection"
1623 orig_entry->ttvn = ttvn;
1624 orig_entry->flags = flags;
1628 orig_entry = kmem_cache_zalloc(batadv_tt_orig_cache, GFP_ATOMIC);
1632 INIT_HLIST_NODE(&orig_entry->list);
1633 kref_get(&orig_node->refcount);
1634 batadv_tt_global_size_inc(orig_node, tt_global->common.vid);
1635 orig_entry->orig_node = orig_node;
1636 orig_entry->ttvn = ttvn;
1637 orig_entry->flags = flags;
1638 kref_init(&orig_entry->refcount);
1640 kref_get(&orig_entry->refcount);
1641 hlist_add_head_rcu(&orig_entry->list,
1642 &tt_global->orig_list);
1643 atomic_inc(&tt_global->orig_list_count);
1646 batadv_tt_global_sync_flags(tt_global);
1649 batadv_tt_orig_list_entry_put(orig_entry);
1651 spin_unlock_bh(&tt_global->list_lock);
1655 * batadv_tt_global_add() - add a new TT global entry or update an existing one
1656 * @bat_priv: the bat priv with all the soft interface information
1657 * @orig_node: the originator announcing the client
1658 * @tt_addr: the mac address of the non-mesh client
1659 * @vid: VLAN identifier
1660 * @flags: TT flags that have to be set for this non-mesh client
1661 * @ttvn: the tt version number ever announcing this non-mesh client
1663 * Add a new TT global entry for the given originator. If the entry already
1664 * exists add a new reference to the given originator (a global entry can have
1665 * references to multiple originators) and adjust the flags attribute to reflect
1666 * the function argument.
1667 * If a TT local entry exists for this non-mesh client remove it.
1669 * The caller must hold orig_node refcount.
1671 * Return: true if the new entry has been added, false otherwise
1673 static bool batadv_tt_global_add(struct batadv_priv *bat_priv,
1674 struct batadv_orig_node *orig_node,
1675 const unsigned char *tt_addr,
1676 unsigned short vid, u16 flags, u8 ttvn)
1678 struct batadv_tt_global_entry *tt_global_entry;
1679 struct batadv_tt_local_entry *tt_local_entry;
1682 struct batadv_tt_common_entry *common;
1685 /* ignore global entries from backbone nodes */
1686 if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid))
1689 tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid);
1690 tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid);
1692 /* if the node already has a local client for this entry, it has to wait
1693 * for a roaming advertisement instead of manually messing up the global
1696 if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry &&
1697 !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW))
1700 if (!tt_global_entry) {
1701 tt_global_entry = kmem_cache_zalloc(batadv_tg_cache,
1703 if (!tt_global_entry)
1706 common = &tt_global_entry->common;
1707 ether_addr_copy(common->addr, tt_addr);
1710 if (!is_multicast_ether_addr(common->addr))
1711 common->flags = flags & (~BATADV_TT_SYNC_MASK);
1713 tt_global_entry->roam_at = 0;
1714 /* node must store current time in case of roaming. This is
1715 * needed to purge this entry out on timeout (if nobody claims
1718 if (flags & BATADV_TT_CLIENT_ROAM)
1719 tt_global_entry->roam_at = jiffies;
1720 kref_init(&common->refcount);
1721 common->added_at = jiffies;
1723 INIT_HLIST_HEAD(&tt_global_entry->orig_list);
1724 atomic_set(&tt_global_entry->orig_list_count, 0);
1725 spin_lock_init(&tt_global_entry->list_lock);
1727 kref_get(&common->refcount);
1728 hash_added = batadv_hash_add(bat_priv->tt.global_hash,
1730 batadv_choose_tt, common,
1731 &common->hash_entry);
1733 if (unlikely(hash_added != 0)) {
1734 /* remove the reference for the hash */
1735 batadv_tt_global_entry_put(tt_global_entry);
1739 common = &tt_global_entry->common;
1740 /* If there is already a global entry, we can use this one for
1742 * But if we are trying to add a temporary client then here are
1743 * two options at this point:
1744 * 1) the global client is not a temporary client: the global
1745 * client has to be left as it is, temporary information
1746 * should never override any already known client state
1747 * 2) the global client is a temporary client: purge the
1748 * originator list and add the new one orig_entry
1750 if (flags & BATADV_TT_CLIENT_TEMP) {
1751 if (!(common->flags & BATADV_TT_CLIENT_TEMP))
1753 if (batadv_tt_global_entry_has_orig(tt_global_entry,
1756 batadv_tt_global_del_orig_list(tt_global_entry);
1757 goto add_orig_entry;
1760 /* if the client was temporary added before receiving the first
1761 * OGM announcing it, we have to clear the TEMP flag. Also,
1762 * remove the previous temporary orig node and re-add it
1763 * if required. If the orig entry changed, the new one which
1764 * is a non-temporary entry is preferred.
1766 if (common->flags & BATADV_TT_CLIENT_TEMP) {
1767 batadv_tt_global_del_orig_list(tt_global_entry);
1768 common->flags &= ~BATADV_TT_CLIENT_TEMP;
1771 /* the change can carry possible "attribute" flags like the
1772 * TT_CLIENT_TEMP, therefore they have to be copied in the
1775 if (!is_multicast_ether_addr(common->addr))
1776 common->flags |= flags & (~BATADV_TT_SYNC_MASK);
1778 /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only
1779 * one originator left in the list and we previously received a
1780 * delete + roaming change for this originator.
1782 * We should first delete the old originator before adding the
1785 if (common->flags & BATADV_TT_CLIENT_ROAM) {
1786 batadv_tt_global_del_orig_list(tt_global_entry);
1787 common->flags &= ~BATADV_TT_CLIENT_ROAM;
1788 tt_global_entry->roam_at = 0;
1792 /* add the new orig_entry (if needed) or update it */
1793 batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn,
1794 flags & BATADV_TT_SYNC_MASK);
1796 batadv_dbg(BATADV_DBG_TT, bat_priv,
1797 "Creating new global tt entry: %pM (vid: %d, via %pM)\n",
1798 common->addr, batadv_print_vid(common->vid),
1803 /* Do not remove multicast addresses from the local hash on
1806 if (is_multicast_ether_addr(tt_addr))
1809 /* remove address from local hash if present */
1810 local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid,
1811 "global tt received",
1812 flags & BATADV_TT_CLIENT_ROAM);
1813 tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI;
1815 if (!(flags & BATADV_TT_CLIENT_ROAM))
1816 /* this is a normal global add. Therefore the client is not in a
1817 * roaming state anymore.
1819 tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM;
1822 if (tt_global_entry)
1823 batadv_tt_global_entry_put(tt_global_entry);
1825 batadv_tt_local_entry_put(tt_local_entry);
1830 * batadv_transtable_best_orig() - Get best originator list entry from tt entry
1831 * @bat_priv: the bat priv with all the soft interface information
1832 * @tt_global_entry: global translation table entry to be analyzed
1834 * This functon assumes the caller holds rcu_read_lock().
1835 * Return: best originator list entry or NULL on errors.
1837 static struct batadv_tt_orig_list_entry *
1838 batadv_transtable_best_orig(struct batadv_priv *bat_priv,
1839 struct batadv_tt_global_entry *tt_global_entry)
1841 struct batadv_neigh_node *router, *best_router = NULL;
1842 struct batadv_algo_ops *bao = bat_priv->algo_ops;
1843 struct hlist_head *head;
1844 struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL;
1846 head = &tt_global_entry->orig_list;
1847 hlist_for_each_entry_rcu(orig_entry, head, list) {
1848 router = batadv_orig_router_get(orig_entry->orig_node,
1854 bao->neigh.cmp(router, BATADV_IF_DEFAULT, best_router,
1855 BATADV_IF_DEFAULT) <= 0) {
1856 batadv_neigh_node_put(router);
1860 /* release the refcount for the "old" best */
1862 batadv_neigh_node_put(best_router);
1864 best_entry = orig_entry;
1865 best_router = router;
1869 batadv_neigh_node_put(best_router);
1874 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1876 * batadv_tt_global_print_entry() - print all orig nodes who announce the
1877 * address for this global entry
1878 * @bat_priv: the bat priv with all the soft interface information
1879 * @tt_global_entry: global translation table entry to be printed
1880 * @seq: debugfs table seq_file struct
1882 * This functon assumes the caller holds rcu_read_lock().
1885 batadv_tt_global_print_entry(struct batadv_priv *bat_priv,
1886 struct batadv_tt_global_entry *tt_global_entry,
1887 struct seq_file *seq)
1889 struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
1890 struct batadv_tt_common_entry *tt_common_entry;
1891 struct batadv_orig_node_vlan *vlan;
1892 struct hlist_head *head;
1896 tt_common_entry = &tt_global_entry->common;
1897 flags = tt_common_entry->flags;
1899 best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
1901 vlan = batadv_orig_node_vlan_get(best_entry->orig_node,
1902 tt_common_entry->vid);
1905 " * Cannot retrieve VLAN %d for originator %pM\n",
1906 batadv_print_vid(tt_common_entry->vid),
1907 best_entry->orig_node->orig);
1911 last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn);
1913 " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1914 '*', tt_global_entry->common.addr,
1915 batadv_print_vid(tt_global_entry->common.vid),
1916 best_entry->ttvn, best_entry->orig_node->orig,
1917 last_ttvn, vlan->tt.crc,
1918 ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'),
1919 ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'),
1920 ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'),
1921 ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.'));
1923 batadv_orig_node_vlan_put(vlan);
1927 head = &tt_global_entry->orig_list;
1929 hlist_for_each_entry_rcu(orig_entry, head, list) {
1930 if (best_entry == orig_entry)
1933 vlan = batadv_orig_node_vlan_get(orig_entry->orig_node,
1934 tt_common_entry->vid);
1937 " + Cannot retrieve VLAN %d for originator %pM\n",
1938 batadv_print_vid(tt_common_entry->vid),
1939 orig_entry->orig_node->orig);
1943 last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn);
1945 " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1946 '+', tt_global_entry->common.addr,
1947 batadv_print_vid(tt_global_entry->common.vid),
1948 orig_entry->ttvn, orig_entry->orig_node->orig,
1949 last_ttvn, vlan->tt.crc,
1950 ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'),
1951 ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'),
1952 ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'),
1953 ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.'));
1955 batadv_orig_node_vlan_put(vlan);
1960 * batadv_tt_global_seq_print_text() - Print the global tt table in a seq file
1961 * @seq: seq file to print on
1966 int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset)
1968 struct net_device *net_dev = (struct net_device *)seq->private;
1969 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1970 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
1971 struct batadv_tt_common_entry *tt_common_entry;
1972 struct batadv_tt_global_entry *tt_global;
1973 struct batadv_hard_iface *primary_if;
1974 struct hlist_head *head;
1977 primary_if = batadv_seq_print_text_primary_if_get(seq);
1982 "Globally announced TT entries received via the mesh %s\n",
1985 " Client VID (TTVN) Originator (Curr TTVN) (CRC ) Flags\n");
1987 for (i = 0; i < hash->size; i++) {
1988 head = &hash->table[i];
1991 hlist_for_each_entry_rcu(tt_common_entry,
1993 tt_global = container_of(tt_common_entry,
1994 struct batadv_tt_global_entry,
1996 batadv_tt_global_print_entry(bat_priv, tt_global, seq);
2002 batadv_hardif_put(primary_if);
2008 * batadv_tt_global_dump_subentry() - Dump all TT local entries into a message
2009 * @msg: Netlink message to dump into
2010 * @portid: Port making netlink request
2011 * @seq: Sequence number of netlink message
2012 * @common: tt local & tt global common data
2013 * @orig: Originator node announcing a non-mesh client
2014 * @best: Is the best originator for the TT entry
2016 * Return: Error code, or 0 on success
2019 batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq,
2020 struct batadv_tt_common_entry *common,
2021 struct batadv_tt_orig_list_entry *orig,
2024 u16 flags = (common->flags & (~BATADV_TT_SYNC_MASK)) | orig->flags;
2026 struct batadv_orig_node_vlan *vlan;
2030 vlan = batadv_orig_node_vlan_get(orig->orig_node,
2037 batadv_orig_node_vlan_put(vlan);
2039 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
2041 BATADV_CMD_GET_TRANSTABLE_GLOBAL);
2045 last_ttvn = atomic_read(&orig->orig_node->last_ttvn);
2047 if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) ||
2048 nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN,
2049 orig->orig_node->orig) ||
2050 nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) ||
2051 nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) ||
2052 nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) ||
2053 nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) ||
2054 nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, flags))
2055 goto nla_put_failure;
2057 if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST))
2058 goto nla_put_failure;
2060 genlmsg_end(msg, hdr);
2064 genlmsg_cancel(msg, hdr);
2069 * batadv_tt_global_dump_entry() - Dump one TT global entry into a message
2070 * @msg: Netlink message to dump into
2071 * @portid: Port making netlink request
2072 * @seq: Sequence number of netlink message
2073 * @bat_priv: The bat priv with all the soft interface information
2074 * @common: tt local & tt global common data
2075 * @sub_s: Number of entries to skip
2077 * This function assumes the caller holds rcu_read_lock().
2079 * Return: Error code, or 0 on success
2082 batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
2083 struct batadv_priv *bat_priv,
2084 struct batadv_tt_common_entry *common, int *sub_s)
2086 struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
2087 struct batadv_tt_global_entry *global;
2088 struct hlist_head *head;
2092 global = container_of(common, struct batadv_tt_global_entry, common);
2093 best_entry = batadv_transtable_best_orig(bat_priv, global);
2094 head = &global->orig_list;
2096 hlist_for_each_entry_rcu(orig_entry, head, list) {
2100 best = (orig_entry == best_entry);
2102 if (batadv_tt_global_dump_subentry(msg, portid, seq, common,
2103 orig_entry, best)) {
2114 * batadv_tt_global_dump_bucket() - Dump one TT local bucket into a message
2115 * @msg: Netlink message to dump into
2116 * @portid: Port making netlink request
2117 * @seq: Sequence number of netlink message
2118 * @bat_priv: The bat priv with all the soft interface information
2119 * @head: Pointer to the list containing the global tt entries
2120 * @idx_s: Number of entries to skip
2121 * @sub: Number of entries to skip
2123 * Return: Error code, or 0 on success
2126 batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq,
2127 struct batadv_priv *bat_priv,
2128 struct hlist_head *head, int *idx_s, int *sub)
2130 struct batadv_tt_common_entry *common;
2134 hlist_for_each_entry_rcu(common, head, hash_entry) {
2138 if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv,
2153 * batadv_tt_global_dump() - Dump TT global entries into a message
2154 * @msg: Netlink message to dump into
2155 * @cb: Parameters from query
2157 * Return: Error code, or length of message on success
2159 int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb)
2161 struct net *net = sock_net(cb->skb->sk);
2162 struct net_device *soft_iface;
2163 struct batadv_priv *bat_priv;
2164 struct batadv_hard_iface *primary_if = NULL;
2165 struct batadv_hashtable *hash;
2166 struct hlist_head *head;
2169 int bucket = cb->args[0];
2170 int idx = cb->args[1];
2171 int sub = cb->args[2];
2172 int portid = NETLINK_CB(cb->skb).portid;
2174 ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
2178 soft_iface = dev_get_by_index(net, ifindex);
2179 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
2184 bat_priv = netdev_priv(soft_iface);
2186 primary_if = batadv_primary_if_get_selected(bat_priv);
2187 if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
2192 hash = bat_priv->tt.global_hash;
2194 while (bucket < hash->size) {
2195 head = &hash->table[bucket];
2197 if (batadv_tt_global_dump_bucket(msg, portid,
2198 cb->nlh->nlmsg_seq, bat_priv,
2209 batadv_hardif_put(primary_if);
2211 dev_put(soft_iface);
2213 cb->args[0] = bucket;
2221 * _batadv_tt_global_del_orig_entry() - remove and free an orig_entry
2222 * @tt_global_entry: the global entry to remove the orig_entry from
2223 * @orig_entry: the orig entry to remove and free
2225 * Remove an orig_entry from its list in the given tt_global_entry and
2226 * free this orig_entry afterwards.
2228 * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is
2232 _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry,
2233 struct batadv_tt_orig_list_entry *orig_entry)
2235 lockdep_assert_held(&tt_global_entry->list_lock);
2237 batadv_tt_global_size_dec(orig_entry->orig_node,
2238 tt_global_entry->common.vid);
2239 atomic_dec(&tt_global_entry->orig_list_count);
2240 /* requires holding tt_global_entry->list_lock and orig_entry->list
2241 * being part of a list
2243 hlist_del_rcu(&orig_entry->list);
2244 batadv_tt_orig_list_entry_put(orig_entry);
2247 /* deletes the orig list of a tt_global_entry */
2249 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry)
2251 struct hlist_head *head;
2252 struct hlist_node *safe;
2253 struct batadv_tt_orig_list_entry *orig_entry;
2255 spin_lock_bh(&tt_global_entry->list_lock);
2256 head = &tt_global_entry->orig_list;
2257 hlist_for_each_entry_safe(orig_entry, safe, head, list)
2258 _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry);
2259 spin_unlock_bh(&tt_global_entry->list_lock);
2263 * batadv_tt_global_del_orig_node() - remove orig_node from a global tt entry
2264 * @bat_priv: the bat priv with all the soft interface information
2265 * @tt_global_entry: the global entry to remove the orig_node from
2266 * @orig_node: the originator announcing the client
2267 * @message: message to append to the log on deletion
2269 * Remove the given orig_node and its according orig_entry from the given
2273 batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv,
2274 struct batadv_tt_global_entry *tt_global_entry,
2275 struct batadv_orig_node *orig_node,
2276 const char *message)
2278 struct hlist_head *head;
2279 struct hlist_node *safe;
2280 struct batadv_tt_orig_list_entry *orig_entry;
2283 spin_lock_bh(&tt_global_entry->list_lock);
2284 head = &tt_global_entry->orig_list;
2285 hlist_for_each_entry_safe(orig_entry, safe, head, list) {
2286 if (orig_entry->orig_node == orig_node) {
2287 vid = tt_global_entry->common.vid;
2288 batadv_dbg(BATADV_DBG_TT, bat_priv,
2289 "Deleting %pM from global tt entry %pM (vid: %d): %s\n",
2291 tt_global_entry->common.addr,
2292 batadv_print_vid(vid), message);
2293 _batadv_tt_global_del_orig_entry(tt_global_entry,
2297 spin_unlock_bh(&tt_global_entry->list_lock);
2300 /* If the client is to be deleted, we check if it is the last origantor entry
2301 * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the
2302 * timer, otherwise we simply remove the originator scheduled for deletion.
2305 batadv_tt_global_del_roaming(struct batadv_priv *bat_priv,
2306 struct batadv_tt_global_entry *tt_global_entry,
2307 struct batadv_orig_node *orig_node,
2308 const char *message)
2310 bool last_entry = true;
2311 struct hlist_head *head;
2312 struct batadv_tt_orig_list_entry *orig_entry;
2314 /* no local entry exists, case 1:
2315 * Check if this is the last one or if other entries exist.
2319 head = &tt_global_entry->orig_list;
2320 hlist_for_each_entry_rcu(orig_entry, head, list) {
2321 if (orig_entry->orig_node != orig_node) {
2329 /* its the last one, mark for roaming. */
2330 tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM;
2331 tt_global_entry->roam_at = jiffies;
2333 /* there is another entry, we can simply delete this
2334 * one and can still use the other one.
2336 batadv_tt_global_del_orig_node(bat_priv, tt_global_entry,
2337 orig_node, message);
2342 * batadv_tt_global_del() - remove a client from the global table
2343 * @bat_priv: the bat priv with all the soft interface information
2344 * @orig_node: an originator serving this client
2345 * @addr: the mac address of the client
2346 * @vid: VLAN identifier
2347 * @message: a message explaining the reason for deleting the client to print
2348 * for debugging purpose
2349 * @roaming: true if the deletion has been triggered by a roaming event
2351 static void batadv_tt_global_del(struct batadv_priv *bat_priv,
2352 struct batadv_orig_node *orig_node,
2353 const unsigned char *addr, unsigned short vid,
2354 const char *message, bool roaming)
2356 struct batadv_tt_global_entry *tt_global_entry;
2357 struct batadv_tt_local_entry *local_entry = NULL;
2359 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
2360 if (!tt_global_entry)
2364 batadv_tt_global_del_orig_node(bat_priv, tt_global_entry,
2365 orig_node, message);
2367 if (hlist_empty(&tt_global_entry->orig_list))
2368 batadv_tt_global_free(bat_priv, tt_global_entry,
2374 /* if we are deleting a global entry due to a roam
2375 * event, there are two possibilities:
2376 * 1) the client roamed from node A to node B => if there
2377 * is only one originator left for this client, we mark
2378 * it with BATADV_TT_CLIENT_ROAM, we start a timer and we
2379 * wait for node B to claim it. In case of timeout
2380 * the entry is purged.
2382 * If there are other originators left, we directly delete
2384 * 2) the client roamed to us => we can directly delete
2385 * the global entry, since it is useless now.
2387 local_entry = batadv_tt_local_hash_find(bat_priv,
2388 tt_global_entry->common.addr,
2391 /* local entry exists, case 2: client roamed to us. */
2392 batadv_tt_global_del_orig_list(tt_global_entry);
2393 batadv_tt_global_free(bat_priv, tt_global_entry, message);
2395 /* no local entry exists, case 1: check for roaming */
2396 batadv_tt_global_del_roaming(bat_priv, tt_global_entry,
2397 orig_node, message);
2401 if (tt_global_entry)
2402 batadv_tt_global_entry_put(tt_global_entry);
2404 batadv_tt_local_entry_put(local_entry);
2408 * batadv_tt_global_del_orig() - remove all the TT global entries belonging to
2409 * the given originator matching the provided vid
2410 * @bat_priv: the bat priv with all the soft interface information
2411 * @orig_node: the originator owning the entries to remove
2412 * @match_vid: the VLAN identifier to match. If negative all the entries will be
2414 * @message: debug message to print as "reason"
2416 void batadv_tt_global_del_orig(struct batadv_priv *bat_priv,
2417 struct batadv_orig_node *orig_node,
2419 const char *message)
2421 struct batadv_tt_global_entry *tt_global;
2422 struct batadv_tt_common_entry *tt_common_entry;
2424 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2425 struct hlist_node *safe;
2426 struct hlist_head *head;
2427 spinlock_t *list_lock; /* protects write access to the hash lists */
2433 for (i = 0; i < hash->size; i++) {
2434 head = &hash->table[i];
2435 list_lock = &hash->list_locks[i];
2437 spin_lock_bh(list_lock);
2438 hlist_for_each_entry_safe(tt_common_entry, safe,
2440 /* remove only matching entries */
2441 if (match_vid >= 0 && tt_common_entry->vid != match_vid)
2444 tt_global = container_of(tt_common_entry,
2445 struct batadv_tt_global_entry,
2448 batadv_tt_global_del_orig_node(bat_priv, tt_global,
2449 orig_node, message);
2451 if (hlist_empty(&tt_global->orig_list)) {
2452 vid = tt_global->common.vid;
2453 batadv_dbg(BATADV_DBG_TT, bat_priv,
2454 "Deleting global tt entry %pM (vid: %d): %s\n",
2455 tt_global->common.addr,
2456 batadv_print_vid(vid), message);
2457 hlist_del_rcu(&tt_common_entry->hash_entry);
2458 batadv_tt_global_entry_put(tt_global);
2461 spin_unlock_bh(list_lock);
2463 clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized);
2466 static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global,
2470 unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT;
2471 unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT;
2473 if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) &&
2474 batadv_has_timed_out(tt_global->roam_at, roam_timeout)) {
2476 *msg = "Roaming timeout\n";
2479 if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) &&
2480 batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) {
2482 *msg = "Temporary client timeout\n";
2488 static void batadv_tt_global_purge(struct batadv_priv *bat_priv)
2490 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2491 struct hlist_head *head;
2492 struct hlist_node *node_tmp;
2493 spinlock_t *list_lock; /* protects write access to the hash lists */
2496 struct batadv_tt_common_entry *tt_common;
2497 struct batadv_tt_global_entry *tt_global;
2499 for (i = 0; i < hash->size; i++) {
2500 head = &hash->table[i];
2501 list_lock = &hash->list_locks[i];
2503 spin_lock_bh(list_lock);
2504 hlist_for_each_entry_safe(tt_common, node_tmp, head,
2506 tt_global = container_of(tt_common,
2507 struct batadv_tt_global_entry,
2510 if (!batadv_tt_global_to_purge(tt_global, &msg))
2513 batadv_dbg(BATADV_DBG_TT, bat_priv,
2514 "Deleting global tt entry %pM (vid: %d): %s\n",
2515 tt_global->common.addr,
2516 batadv_print_vid(tt_global->common.vid),
2519 hlist_del_rcu(&tt_common->hash_entry);
2521 batadv_tt_global_entry_put(tt_global);
2523 spin_unlock_bh(list_lock);
2527 static void batadv_tt_global_table_free(struct batadv_priv *bat_priv)
2529 struct batadv_hashtable *hash;
2530 spinlock_t *list_lock; /* protects write access to the hash lists */
2531 struct batadv_tt_common_entry *tt_common_entry;
2532 struct batadv_tt_global_entry *tt_global;
2533 struct hlist_node *node_tmp;
2534 struct hlist_head *head;
2537 if (!bat_priv->tt.global_hash)
2540 hash = bat_priv->tt.global_hash;
2542 for (i = 0; i < hash->size; i++) {
2543 head = &hash->table[i];
2544 list_lock = &hash->list_locks[i];
2546 spin_lock_bh(list_lock);
2547 hlist_for_each_entry_safe(tt_common_entry, node_tmp,
2549 hlist_del_rcu(&tt_common_entry->hash_entry);
2550 tt_global = container_of(tt_common_entry,
2551 struct batadv_tt_global_entry,
2553 batadv_tt_global_entry_put(tt_global);
2555 spin_unlock_bh(list_lock);
2558 batadv_hash_destroy(hash);
2560 bat_priv->tt.global_hash = NULL;
2564 _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry,
2565 struct batadv_tt_global_entry *tt_global_entry)
2567 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI &&
2568 tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI)
2571 /* check if the two clients are marked as isolated */
2572 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA &&
2573 tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA)
2580 * batadv_transtable_search() - get the mesh destination for a given client
2581 * @bat_priv: the bat priv with all the soft interface information
2582 * @src: mac address of the source client
2583 * @addr: mac address of the destination client
2584 * @vid: VLAN identifier
2586 * Return: a pointer to the originator that was selected as destination in the
2587 * mesh for contacting the client 'addr', NULL otherwise.
2588 * In case of multiple originators serving the same client, the function returns
2589 * the best one (best in terms of metric towards the destination node).
2591 * If the two clients are AP isolated the function returns NULL.
2593 struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv,
2598 struct batadv_tt_local_entry *tt_local_entry = NULL;
2599 struct batadv_tt_global_entry *tt_global_entry = NULL;
2600 struct batadv_orig_node *orig_node = NULL;
2601 struct batadv_tt_orig_list_entry *best_entry;
2603 if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) {
2604 tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid);
2605 if (!tt_local_entry ||
2606 (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING))
2610 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
2611 if (!tt_global_entry)
2614 /* check whether the clients should not communicate due to AP
2617 if (tt_local_entry &&
2618 _batadv_is_ap_isolated(tt_local_entry, tt_global_entry))
2622 best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
2623 /* found anything? */
2625 orig_node = best_entry->orig_node;
2626 if (orig_node && !kref_get_unless_zero(&orig_node->refcount))
2631 if (tt_global_entry)
2632 batadv_tt_global_entry_put(tt_global_entry);
2634 batadv_tt_local_entry_put(tt_local_entry);
2640 * batadv_tt_global_crc() - calculates the checksum of the local table belonging
2641 * to the given orig_node
2642 * @bat_priv: the bat priv with all the soft interface information
2643 * @orig_node: originator for which the CRC should be computed
2644 * @vid: VLAN identifier for which the CRC32 has to be computed
2646 * This function computes the checksum for the global table corresponding to a
2647 * specific originator. In particular, the checksum is computed as follows: For
2648 * each client connected to the originator the CRC32C of the MAC address and the
2649 * VID is computed and then all the CRC32Cs of the various clients are xor'ed
2652 * The idea behind is that CRC32C should be used as much as possible in order to
2653 * produce a unique hash of the table, but since the order which is used to feed
2654 * the CRC32C function affects the result and since every node in the network
2655 * probably sorts the clients differently, the hash function cannot be directly
2656 * computed over the entire table. Hence the CRC32C is used only on
2657 * the single client entry, while all the results are then xor'ed together
2658 * because the XOR operation can combine them all while trying to reduce the
2659 * noise as much as possible.
2661 * Return: the checksum of the global table of a given originator.
2663 static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv,
2664 struct batadv_orig_node *orig_node,
2667 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2668 struct batadv_tt_orig_list_entry *tt_orig;
2669 struct batadv_tt_common_entry *tt_common;
2670 struct batadv_tt_global_entry *tt_global;
2671 struct hlist_head *head;
2672 u32 i, crc_tmp, crc = 0;
2676 for (i = 0; i < hash->size; i++) {
2677 head = &hash->table[i];
2680 hlist_for_each_entry_rcu(tt_common, head, hash_entry) {
2681 tt_global = container_of(tt_common,
2682 struct batadv_tt_global_entry,
2684 /* compute the CRC only for entries belonging to the
2685 * VLAN identified by the vid passed as parameter
2687 if (tt_common->vid != vid)
2690 /* Roaming clients are in the global table for
2691 * consistency only. They don't have to be
2692 * taken into account while computing the
2695 if (tt_common->flags & BATADV_TT_CLIENT_ROAM)
2697 /* Temporary clients have not been announced yet, so
2698 * they have to be skipped while computing the global
2701 if (tt_common->flags & BATADV_TT_CLIENT_TEMP)
2704 /* find out if this global entry is announced by this
2707 tt_orig = batadv_tt_global_orig_entry_find(tt_global,
2712 /* use network order to read the VID: this ensures that
2713 * every node reads the bytes in the same order.
2715 tmp_vid = htons(tt_common->vid);
2716 crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid));
2718 /* compute the CRC on flags that have to be kept in sync
2721 flags = tt_orig->flags;
2722 crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
2724 crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
2726 batadv_tt_orig_list_entry_put(tt_orig);
2735 * batadv_tt_local_crc() - calculates the checksum of the local table
2736 * @bat_priv: the bat priv with all the soft interface information
2737 * @vid: VLAN identifier for which the CRC32 has to be computed
2739 * For details about the computation, please refer to the documentation for
2740 * batadv_tt_global_crc().
2742 * Return: the checksum of the local table
2744 static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv,
2747 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
2748 struct batadv_tt_common_entry *tt_common;
2749 struct hlist_head *head;
2750 u32 i, crc_tmp, crc = 0;
2754 for (i = 0; i < hash->size; i++) {
2755 head = &hash->table[i];
2758 hlist_for_each_entry_rcu(tt_common, head, hash_entry) {
2759 /* compute the CRC only for entries belonging to the
2760 * VLAN identified by vid
2762 if (tt_common->vid != vid)
2765 /* not yet committed clients have not to be taken into
2766 * account while computing the CRC
2768 if (tt_common->flags & BATADV_TT_CLIENT_NEW)
2771 /* use network order to read the VID: this ensures that
2772 * every node reads the bytes in the same order.
2774 tmp_vid = htons(tt_common->vid);
2775 crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid));
2777 /* compute the CRC on flags that have to be kept in sync
2780 flags = tt_common->flags & BATADV_TT_SYNC_MASK;
2781 crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
2783 crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
2792 * batadv_tt_req_node_release() - free tt_req node entry
2793 * @ref: kref pointer of the tt req_node entry
2795 static void batadv_tt_req_node_release(struct kref *ref)
2797 struct batadv_tt_req_node *tt_req_node;
2799 tt_req_node = container_of(ref, struct batadv_tt_req_node, refcount);
2801 kmem_cache_free(batadv_tt_req_cache, tt_req_node);
2805 * batadv_tt_req_node_put() - decrement the tt_req_node refcounter and
2806 * possibly release it
2807 * @tt_req_node: tt_req_node to be free'd
2809 static void batadv_tt_req_node_put(struct batadv_tt_req_node *tt_req_node)
2811 kref_put(&tt_req_node->refcount, batadv_tt_req_node_release);
2814 static void batadv_tt_req_list_free(struct batadv_priv *bat_priv)
2816 struct batadv_tt_req_node *node;
2817 struct hlist_node *safe;
2819 spin_lock_bh(&bat_priv->tt.req_list_lock);
2821 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
2822 hlist_del_init(&node->list);
2823 batadv_tt_req_node_put(node);
2826 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2829 static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv,
2830 struct batadv_orig_node *orig_node,
2831 const void *tt_buff,
2834 /* Replace the old buffer only if I received something in the
2835 * last OGM (the OGM could carry no changes)
2837 spin_lock_bh(&orig_node->tt_buff_lock);
2838 if (tt_buff_len > 0) {
2839 kfree(orig_node->tt_buff);
2840 orig_node->tt_buff_len = 0;
2841 orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC);
2842 if (orig_node->tt_buff) {
2843 memcpy(orig_node->tt_buff, tt_buff, tt_buff_len);
2844 orig_node->tt_buff_len = tt_buff_len;
2847 spin_unlock_bh(&orig_node->tt_buff_lock);
2850 static void batadv_tt_req_purge(struct batadv_priv *bat_priv)
2852 struct batadv_tt_req_node *node;
2853 struct hlist_node *safe;
2855 spin_lock_bh(&bat_priv->tt.req_list_lock);
2856 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
2857 if (batadv_has_timed_out(node->issued_at,
2858 BATADV_TT_REQUEST_TIMEOUT)) {
2859 hlist_del_init(&node->list);
2860 batadv_tt_req_node_put(node);
2863 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2867 * batadv_tt_req_node_new() - search and possibly create a tt_req_node object
2868 * @bat_priv: the bat priv with all the soft interface information
2869 * @orig_node: orig node this request is being issued for
2871 * Return: the pointer to the new tt_req_node struct if no request
2872 * has already been issued for this orig_node, NULL otherwise.
2874 static struct batadv_tt_req_node *
2875 batadv_tt_req_node_new(struct batadv_priv *bat_priv,
2876 struct batadv_orig_node *orig_node)
2878 struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL;
2880 spin_lock_bh(&bat_priv->tt.req_list_lock);
2881 hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) {
2882 if (batadv_compare_eth(tt_req_node_tmp, orig_node) &&
2883 !batadv_has_timed_out(tt_req_node_tmp->issued_at,
2884 BATADV_TT_REQUEST_TIMEOUT))
2888 tt_req_node = kmem_cache_alloc(batadv_tt_req_cache, GFP_ATOMIC);
2892 kref_init(&tt_req_node->refcount);
2893 ether_addr_copy(tt_req_node->addr, orig_node->orig);
2894 tt_req_node->issued_at = jiffies;
2896 kref_get(&tt_req_node->refcount);
2897 hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list);
2899 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2904 * batadv_tt_local_valid() - verify local tt entry and get flags
2905 * @entry_ptr: to be checked local tt entry
2906 * @data_ptr: not used but definition required to satisfy the callback prototype
2907 * @flags: a pointer to store TT flags for this client to
2909 * Checks the validity of the given local TT entry. If it is, then the provided
2910 * flags pointer is updated.
2912 * Return: true if the entry is a valid, false otherwise.
2914 static bool batadv_tt_local_valid(const void *entry_ptr,
2915 const void *data_ptr,
2918 const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
2920 if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW)
2924 *flags = tt_common_entry->flags;
2930 * batadv_tt_global_valid() - verify global tt entry and get flags
2931 * @entry_ptr: to be checked global tt entry
2932 * @data_ptr: an orig_node object (may be NULL)
2933 * @flags: a pointer to store TT flags for this client to
2935 * Checks the validity of the given global TT entry. If it is, then the provided
2936 * flags pointer is updated either with the common (summed) TT flags if data_ptr
2937 * is NULL or the specific, per originator TT flags otherwise.
2939 * Return: true if the entry is a valid, false otherwise.
2941 static bool batadv_tt_global_valid(const void *entry_ptr,
2942 const void *data_ptr,
2945 const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
2946 const struct batadv_tt_global_entry *tt_global_entry;
2947 const struct batadv_orig_node *orig_node = data_ptr;
2949 if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM ||
2950 tt_common_entry->flags & BATADV_TT_CLIENT_TEMP)
2953 tt_global_entry = container_of(tt_common_entry,
2954 struct batadv_tt_global_entry,
2957 return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node,
2962 * batadv_tt_tvlv_generate() - fill the tvlv buff with the tt entries from the
2964 * @bat_priv: the bat priv with all the soft interface information
2965 * @hash: hash table containing the tt entries
2966 * @tt_len: expected tvlv tt data buffer length in number of bytes
2967 * @tvlv_buff: pointer to the buffer to fill with the TT data
2968 * @valid_cb: function to filter tt change entries and to return TT flags
2969 * @cb_data: data passed to the filter function as argument
2971 * Fills the tvlv buff with the tt entries from the specified hash. If valid_cb
2972 * is not provided then this becomes a no-op.
2974 static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
2975 struct batadv_hashtable *hash,
2976 void *tvlv_buff, u16 tt_len,
2977 bool (*valid_cb)(const void *,
2982 struct batadv_tt_common_entry *tt_common_entry;
2983 struct batadv_tvlv_tt_change *tt_change;
2984 struct hlist_head *head;
2985 u16 tt_tot, tt_num_entries = 0;
2990 tt_tot = batadv_tt_entries(tt_len);
2991 tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff;
2997 for (i = 0; i < hash->size; i++) {
2998 head = &hash->table[i];
3000 hlist_for_each_entry_rcu(tt_common_entry,
3002 if (tt_tot == tt_num_entries)
3005 ret = valid_cb(tt_common_entry, cb_data, &flags);
3009 ether_addr_copy(tt_change->addr, tt_common_entry->addr);
3010 tt_change->flags = flags;
3011 tt_change->vid = htons(tt_common_entry->vid);
3012 memset(tt_change->reserved, 0,
3013 sizeof(tt_change->reserved));
3023 * batadv_tt_global_check_crc() - check if all the CRCs are correct
3024 * @orig_node: originator for which the CRCs have to be checked
3025 * @tt_vlan: pointer to the first tvlv VLAN entry
3026 * @num_vlan: number of tvlv VLAN entries
3028 * Return: true if all the received CRCs match the locally stored ones, false
3031 static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node,
3032 struct batadv_tvlv_tt_vlan_data *tt_vlan,
3035 struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp;
3036 struct batadv_orig_node_vlan *vlan;
3037 int i, orig_num_vlan;
3040 /* check if each received CRC matches the locally stored one */
3041 for (i = 0; i < num_vlan; i++) {
3042 tt_vlan_tmp = tt_vlan + i;
3044 /* if orig_node is a backbone node for this VLAN, don't check
3045 * the CRC as we ignore all the global entries over it
3047 if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv,
3049 ntohs(tt_vlan_tmp->vid)))
3052 vlan = batadv_orig_node_vlan_get(orig_node,
3053 ntohs(tt_vlan_tmp->vid));
3058 batadv_orig_node_vlan_put(vlan);
3060 if (crc != ntohl(tt_vlan_tmp->crc))
3064 /* check if any excess VLANs exist locally for the originator
3065 * which are not mentioned in the TVLV from the originator.
3069 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list)
3073 if (orig_num_vlan > num_vlan)
3080 * batadv_tt_local_update_crc() - update all the local CRCs
3081 * @bat_priv: the bat priv with all the soft interface information
3083 static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv)
3085 struct batadv_softif_vlan *vlan;
3087 /* recompute the global CRC for each VLAN */
3089 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
3090 vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid);
3096 * batadv_tt_global_update_crc() - update all the global CRCs for this orig_node
3097 * @bat_priv: the bat priv with all the soft interface information
3098 * @orig_node: the orig_node for which the CRCs have to be updated
3100 static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv,
3101 struct batadv_orig_node *orig_node)
3103 struct batadv_orig_node_vlan *vlan;
3106 /* recompute the global CRC for each VLAN */
3108 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
3109 /* if orig_node is a backbone node for this VLAN, don't compute
3110 * the CRC as we ignore all the global entries over it
3112 if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig,
3116 crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid);
3123 * batadv_send_tt_request() - send a TT Request message to a given node
3124 * @bat_priv: the bat priv with all the soft interface information
3125 * @dst_orig_node: the destination of the message
3126 * @ttvn: the version number that the source of the message is looking for
3127 * @tt_vlan: pointer to the first tvlv VLAN object to request
3128 * @num_vlan: number of tvlv VLAN entries
3129 * @full_table: ask for the entire translation table if true, while only for the
3130 * last TT diff otherwise
3132 * Return: true if the TT Request was sent, false otherwise
3134 static bool batadv_send_tt_request(struct batadv_priv *bat_priv,
3135 struct batadv_orig_node *dst_orig_node,
3137 struct batadv_tvlv_tt_vlan_data *tt_vlan,
3138 u16 num_vlan, bool full_table)
3140 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3141 struct batadv_tt_req_node *tt_req_node = NULL;
3142 struct batadv_tvlv_tt_vlan_data *tt_vlan_req;
3143 struct batadv_hard_iface *primary_if;
3147 primary_if = batadv_primary_if_get_selected(bat_priv);
3151 /* The new tt_req will be issued only if I'm not waiting for a
3152 * reply from the same orig_node yet
3154 tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node);
3158 size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan;
3159 tvlv_tt_data = kzalloc(size, GFP_ATOMIC);
3163 tvlv_tt_data->flags = BATADV_TT_REQUEST;
3164 tvlv_tt_data->ttvn = ttvn;
3165 tvlv_tt_data->num_vlan = htons(num_vlan);
3167 /* send all the CRCs within the request. This is needed by intermediate
3168 * nodes to ensure they have the correct table before replying
3170 tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1);
3171 for (i = 0; i < num_vlan; i++) {
3172 tt_vlan_req->vid = tt_vlan->vid;
3173 tt_vlan_req->crc = tt_vlan->crc;
3180 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3182 batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n",
3183 dst_orig_node->orig, full_table ? 'F' : '.');
3185 batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX);
3186 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3187 dst_orig_node->orig, BATADV_TVLV_TT, 1,
3188 tvlv_tt_data, size);
3193 batadv_hardif_put(primary_if);
3195 if (ret && tt_req_node) {
3196 spin_lock_bh(&bat_priv->tt.req_list_lock);
3197 if (!hlist_unhashed(&tt_req_node->list)) {
3198 hlist_del_init(&tt_req_node->list);
3199 batadv_tt_req_node_put(tt_req_node);
3201 spin_unlock_bh(&bat_priv->tt.req_list_lock);
3205 batadv_tt_req_node_put(tt_req_node);
3207 kfree(tvlv_tt_data);
3212 * batadv_send_other_tt_response() - send reply to tt request concerning another
3213 * node's translation table
3214 * @bat_priv: the bat priv with all the soft interface information
3215 * @tt_data: tt data containing the tt request information
3216 * @req_src: mac address of tt request sender
3217 * @req_dst: mac address of tt request recipient
3219 * Return: true if tt request reply was sent, false otherwise.
3221 static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv,
3222 struct batadv_tvlv_tt_data *tt_data,
3223 u8 *req_src, u8 *req_dst)
3225 struct batadv_orig_node *req_dst_orig_node;
3226 struct batadv_orig_node *res_dst_orig_node = NULL;
3227 struct batadv_tvlv_tt_change *tt_change;
3228 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3229 struct batadv_tvlv_tt_vlan_data *tt_vlan;
3230 bool ret = false, full_table;
3231 u8 orig_ttvn, req_ttvn;
3235 batadv_dbg(BATADV_DBG_TT, bat_priv,
3236 "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n",
3237 req_src, tt_data->ttvn, req_dst,
3238 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3240 /* Let's get the orig node of the REAL destination */
3241 req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst);
3242 if (!req_dst_orig_node)
3245 res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src);
3246 if (!res_dst_orig_node)
3249 orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn);
3250 req_ttvn = tt_data->ttvn;
3252 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
3253 /* this node doesn't have the requested data */
3254 if (orig_ttvn != req_ttvn ||
3255 !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan,
3256 ntohs(tt_data->num_vlan)))
3259 /* If the full table has been explicitly requested */
3260 if (tt_data->flags & BATADV_TT_FULL_TABLE ||
3261 !req_dst_orig_node->tt_buff)
3266 /* TT fragmentation hasn't been implemented yet, so send as many
3267 * TT entries fit a single packet as possible only
3270 spin_lock_bh(&req_dst_orig_node->tt_buff_lock);
3271 tt_len = req_dst_orig_node->tt_buff_len;
3273 tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
3280 /* Copy the last orig_node's OGM buffer */
3281 memcpy(tt_change, req_dst_orig_node->tt_buff,
3282 req_dst_orig_node->tt_buff_len);
3283 spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
3285 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3286 * in the initial part
3289 tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
3296 /* fill the rest of the tvlv with the real TT entries */
3297 batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash,
3299 batadv_tt_global_valid,
3303 /* Don't send the response, if larger than fragmented packet. */
3304 tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len;
3305 if (tt_len > atomic_read(&bat_priv->packet_size_max)) {
3306 net_ratelimited_function(batadv_info, bat_priv->soft_iface,
3307 "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n",
3308 res_dst_orig_node->orig);
3312 tvlv_tt_data->flags = BATADV_TT_RESPONSE;
3313 tvlv_tt_data->ttvn = req_ttvn;
3316 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3318 batadv_dbg(BATADV_DBG_TT, bat_priv,
3319 "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n",
3320 res_dst_orig_node->orig, req_dst_orig_node->orig,
3321 full_table ? 'F' : '.', req_ttvn);
3323 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
3325 batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig,
3326 req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
3333 spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
3336 if (res_dst_orig_node)
3337 batadv_orig_node_put(res_dst_orig_node);
3338 if (req_dst_orig_node)
3339 batadv_orig_node_put(req_dst_orig_node);
3340 kfree(tvlv_tt_data);
3345 * batadv_send_my_tt_response() - send reply to tt request concerning this
3346 * node's translation table
3347 * @bat_priv: the bat priv with all the soft interface information
3348 * @tt_data: tt data containing the tt request information
3349 * @req_src: mac address of tt request sender
3351 * Return: true if tt request reply was sent, false otherwise.
3353 static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv,
3354 struct batadv_tvlv_tt_data *tt_data,
3357 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3358 struct batadv_hard_iface *primary_if = NULL;
3359 struct batadv_tvlv_tt_change *tt_change;
3360 struct batadv_orig_node *orig_node;
3361 u8 my_ttvn, req_ttvn;
3366 batadv_dbg(BATADV_DBG_TT, bat_priv,
3367 "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
3368 req_src, tt_data->ttvn,
3369 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3371 spin_lock_bh(&bat_priv->tt.commit_lock);
3373 my_ttvn = (u8)atomic_read(&bat_priv->tt.vn);
3374 req_ttvn = tt_data->ttvn;
3376 orig_node = batadv_orig_hash_find(bat_priv, req_src);
3380 primary_if = batadv_primary_if_get_selected(bat_priv);
3384 /* If the full table has been explicitly requested or the gap
3385 * is too big send the whole local translation table
3387 if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn ||
3388 !bat_priv->tt.last_changeset)
3393 /* TT fragmentation hasn't been implemented yet, so send as many
3394 * TT entries fit a single packet as possible only
3397 spin_lock_bh(&bat_priv->tt.last_changeset_lock);
3399 tt_len = bat_priv->tt.last_changeset_len;
3400 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
3404 if (!tt_len || !tvlv_len)
3407 /* Copy the last orig_node's OGM buffer */
3408 memcpy(tt_change, bat_priv->tt.last_changeset,
3409 bat_priv->tt.last_changeset_len);
3410 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
3412 req_ttvn = (u8)atomic_read(&bat_priv->tt.vn);
3414 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3415 * in the initial part
3418 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
3422 if (!tt_len || !tvlv_len)
3425 /* fill the rest of the tvlv with the real TT entries */
3426 batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash,
3428 batadv_tt_local_valid, NULL);
3431 tvlv_tt_data->flags = BATADV_TT_RESPONSE;
3432 tvlv_tt_data->ttvn = req_ttvn;
3435 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3437 batadv_dbg(BATADV_DBG_TT, bat_priv,
3438 "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n",
3439 orig_node->orig, full_table ? 'F' : '.', req_ttvn);
3441 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
3443 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3444 req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
3450 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
3452 spin_unlock_bh(&bat_priv->tt.commit_lock);
3454 batadv_orig_node_put(orig_node);
3456 batadv_hardif_put(primary_if);
3457 kfree(tvlv_tt_data);
3458 /* The packet was for this host, so it doesn't need to be re-routed */
3463 * batadv_send_tt_response() - send reply to tt request
3464 * @bat_priv: the bat priv with all the soft interface information
3465 * @tt_data: tt data containing the tt request information
3466 * @req_src: mac address of tt request sender
3467 * @req_dst: mac address of tt request recipient
3469 * Return: true if tt request reply was sent, false otherwise.
3471 static bool batadv_send_tt_response(struct batadv_priv *bat_priv,
3472 struct batadv_tvlv_tt_data *tt_data,
3473 u8 *req_src, u8 *req_dst)
3475 if (batadv_is_my_mac(bat_priv, req_dst))
3476 return batadv_send_my_tt_response(bat_priv, tt_data, req_src);
3477 return batadv_send_other_tt_response(bat_priv, tt_data, req_src,
3481 static void _batadv_tt_update_changes(struct batadv_priv *bat_priv,
3482 struct batadv_orig_node *orig_node,
3483 struct batadv_tvlv_tt_change *tt_change,
3484 u16 tt_num_changes, u8 ttvn)
3489 for (i = 0; i < tt_num_changes; i++) {
3490 if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) {
3491 roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM;
3492 batadv_tt_global_del(bat_priv, orig_node,
3493 (tt_change + i)->addr,
3494 ntohs((tt_change + i)->vid),
3495 "tt removed by changes",
3498 if (!batadv_tt_global_add(bat_priv, orig_node,
3499 (tt_change + i)->addr,
3500 ntohs((tt_change + i)->vid),
3501 (tt_change + i)->flags, ttvn))
3502 /* In case of problem while storing a
3503 * global_entry, we stop the updating
3504 * procedure without committing the
3505 * ttvn change. This will avoid to send
3506 * corrupted data on tt_request
3511 set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized);
3514 static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv,
3515 struct batadv_tvlv_tt_change *tt_change,
3516 u8 ttvn, u8 *resp_src,
3519 struct batadv_orig_node *orig_node;
3521 orig_node = batadv_orig_hash_find(bat_priv, resp_src);
3525 /* Purge the old table first.. */
3526 batadv_tt_global_del_orig(bat_priv, orig_node, -1,
3527 "Received full table");
3529 _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries,
3532 spin_lock_bh(&orig_node->tt_buff_lock);
3533 kfree(orig_node->tt_buff);
3534 orig_node->tt_buff_len = 0;
3535 orig_node->tt_buff = NULL;
3536 spin_unlock_bh(&orig_node->tt_buff_lock);
3538 atomic_set(&orig_node->last_ttvn, ttvn);
3542 batadv_orig_node_put(orig_node);
3545 static void batadv_tt_update_changes(struct batadv_priv *bat_priv,
3546 struct batadv_orig_node *orig_node,
3547 u16 tt_num_changes, u8 ttvn,
3548 struct batadv_tvlv_tt_change *tt_change)
3550 _batadv_tt_update_changes(bat_priv, orig_node, tt_change,
3551 tt_num_changes, ttvn);
3553 batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change,
3554 batadv_tt_len(tt_num_changes));
3555 atomic_set(&orig_node->last_ttvn, ttvn);
3559 * batadv_is_my_client() - check if a client is served by the local node
3560 * @bat_priv: the bat priv with all the soft interface information
3561 * @addr: the mac address of the client to check
3562 * @vid: VLAN identifier
3564 * Return: true if the client is served by this node, false otherwise.
3566 bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr,
3569 struct batadv_tt_local_entry *tt_local_entry;
3572 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
3573 if (!tt_local_entry)
3575 /* Check if the client has been logically deleted (but is kept for
3576 * consistency purpose)
3578 if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) ||
3579 (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM))
3584 batadv_tt_local_entry_put(tt_local_entry);
3589 * batadv_handle_tt_response() - process incoming tt reply
3590 * @bat_priv: the bat priv with all the soft interface information
3591 * @tt_data: tt data containing the tt request information
3592 * @resp_src: mac address of tt reply sender
3593 * @num_entries: number of tt change entries appended to the tt data
3595 static void batadv_handle_tt_response(struct batadv_priv *bat_priv,
3596 struct batadv_tvlv_tt_data *tt_data,
3597 u8 *resp_src, u16 num_entries)
3599 struct batadv_tt_req_node *node;
3600 struct hlist_node *safe;
3601 struct batadv_orig_node *orig_node = NULL;
3602 struct batadv_tvlv_tt_change *tt_change;
3603 u8 *tvlv_ptr = (u8 *)tt_data;
3606 batadv_dbg(BATADV_DBG_TT, bat_priv,
3607 "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
3608 resp_src, tt_data->ttvn, num_entries,
3609 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3611 orig_node = batadv_orig_hash_find(bat_priv, resp_src);
3615 spin_lock_bh(&orig_node->tt_lock);
3617 change_offset = sizeof(struct batadv_tvlv_tt_vlan_data);
3618 change_offset *= ntohs(tt_data->num_vlan);
3619 change_offset += sizeof(*tt_data);
3620 tvlv_ptr += change_offset;
3622 tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr;
3623 if (tt_data->flags & BATADV_TT_FULL_TABLE) {
3624 batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn,
3625 resp_src, num_entries);
3627 batadv_tt_update_changes(bat_priv, orig_node, num_entries,
3628 tt_data->ttvn, tt_change);
3631 /* Recalculate the CRC for this orig_node and store it */
3632 batadv_tt_global_update_crc(bat_priv, orig_node);
3634 spin_unlock_bh(&orig_node->tt_lock);
3636 /* Delete the tt_req_node from pending tt_requests list */
3637 spin_lock_bh(&bat_priv->tt.req_list_lock);
3638 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
3639 if (!batadv_compare_eth(node->addr, resp_src))
3641 hlist_del_init(&node->list);
3642 batadv_tt_req_node_put(node);
3645 spin_unlock_bh(&bat_priv->tt.req_list_lock);
3648 batadv_orig_node_put(orig_node);
3651 static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv)
3653 struct batadv_tt_roam_node *node, *safe;
3655 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3657 list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) {
3658 list_del(&node->list);
3659 kmem_cache_free(batadv_tt_roam_cache, node);
3662 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3665 static void batadv_tt_roam_purge(struct batadv_priv *bat_priv)
3667 struct batadv_tt_roam_node *node, *safe;
3669 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3670 list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) {
3671 if (!batadv_has_timed_out(node->first_time,
3672 BATADV_ROAMING_MAX_TIME))
3675 list_del(&node->list);
3676 kmem_cache_free(batadv_tt_roam_cache, node);
3678 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3682 * batadv_tt_check_roam_count() - check if a client has roamed too frequently
3683 * @bat_priv: the bat priv with all the soft interface information
3684 * @client: mac address of the roaming client
3686 * This function checks whether the client already reached the
3687 * maximum number of possible roaming phases. In this case the ROAMING_ADV
3690 * Return: true if the ROAMING_ADV can be sent, false otherwise
3692 static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client)
3694 struct batadv_tt_roam_node *tt_roam_node;
3697 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3698 /* The new tt_req will be issued only if I'm not waiting for a
3699 * reply from the same orig_node yet
3701 list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) {
3702 if (!batadv_compare_eth(tt_roam_node->addr, client))
3705 if (batadv_has_timed_out(tt_roam_node->first_time,
3706 BATADV_ROAMING_MAX_TIME))
3709 if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter))
3710 /* Sorry, you roamed too many times! */
3717 tt_roam_node = kmem_cache_alloc(batadv_tt_roam_cache,
3722 tt_roam_node->first_time = jiffies;
3723 atomic_set(&tt_roam_node->counter,
3724 BATADV_ROAMING_MAX_COUNT - 1);
3725 ether_addr_copy(tt_roam_node->addr, client);
3727 list_add(&tt_roam_node->list, &bat_priv->tt.roam_list);
3732 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3737 * batadv_send_roam_adv() - send a roaming advertisement message
3738 * @bat_priv: the bat priv with all the soft interface information
3739 * @client: mac address of the roaming client
3740 * @vid: VLAN identifier
3741 * @orig_node: message destination
3743 * Send a ROAMING_ADV message to the node which was previously serving this
3744 * client. This is done to inform the node that from now on all traffic destined
3745 * for this particular roamed client has to be forwarded to the sender of the
3748 static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client,
3750 struct batadv_orig_node *orig_node)
3752 struct batadv_hard_iface *primary_if;
3753 struct batadv_tvlv_roam_adv tvlv_roam;
3755 primary_if = batadv_primary_if_get_selected(bat_priv);
3759 /* before going on we have to check whether the client has
3760 * already roamed to us too many times
3762 if (!batadv_tt_check_roam_count(bat_priv, client))
3765 batadv_dbg(BATADV_DBG_TT, bat_priv,
3766 "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n",
3767 orig_node->orig, client, batadv_print_vid(vid));
3769 batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX);
3771 memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client));
3772 tvlv_roam.vid = htons(vid);
3774 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3775 orig_node->orig, BATADV_TVLV_ROAM, 1,
3776 &tvlv_roam, sizeof(tvlv_roam));
3780 batadv_hardif_put(primary_if);
3783 static void batadv_tt_purge(struct work_struct *work)
3785 struct delayed_work *delayed_work;
3786 struct batadv_priv_tt *priv_tt;
3787 struct batadv_priv *bat_priv;
3789 delayed_work = to_delayed_work(work);
3790 priv_tt = container_of(delayed_work, struct batadv_priv_tt, work);
3791 bat_priv = container_of(priv_tt, struct batadv_priv, tt);
3793 batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT);
3794 batadv_tt_global_purge(bat_priv);
3795 batadv_tt_req_purge(bat_priv);
3796 batadv_tt_roam_purge(bat_priv);
3798 queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
3799 msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
3803 * batadv_tt_free() - Free translation table of soft interface
3804 * @bat_priv: the bat priv with all the soft interface information
3806 void batadv_tt_free(struct batadv_priv *bat_priv)
3808 batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1);
3809 batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1);
3811 cancel_delayed_work_sync(&bat_priv->tt.work);
3813 batadv_tt_local_table_free(bat_priv);
3814 batadv_tt_global_table_free(bat_priv);
3815 batadv_tt_req_list_free(bat_priv);
3816 batadv_tt_changes_list_free(bat_priv);
3817 batadv_tt_roam_list_free(bat_priv);
3819 kfree(bat_priv->tt.last_changeset);
3823 * batadv_tt_local_set_flags() - set or unset the specified flags on the local
3824 * table and possibly count them in the TT size
3825 * @bat_priv: the bat priv with all the soft interface information
3826 * @flags: the flag to switch
3827 * @enable: whether to set or unset the flag
3828 * @count: whether to increase the TT size by the number of changed entries
3830 static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags,
3831 bool enable, bool count)
3833 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
3834 struct batadv_tt_common_entry *tt_common_entry;
3835 struct hlist_head *head;
3841 for (i = 0; i < hash->size; i++) {
3842 head = &hash->table[i];
3845 hlist_for_each_entry_rcu(tt_common_entry,
3848 if ((tt_common_entry->flags & flags) == flags)
3850 tt_common_entry->flags |= flags;
3852 if (!(tt_common_entry->flags & flags))
3854 tt_common_entry->flags &= ~flags;
3860 batadv_tt_local_size_inc(bat_priv,
3861 tt_common_entry->vid);
3867 /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */
3868 static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv)
3870 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
3871 struct batadv_tt_common_entry *tt_common;
3872 struct batadv_tt_local_entry *tt_local;
3873 struct hlist_node *node_tmp;
3874 struct hlist_head *head;
3875 spinlock_t *list_lock; /* protects write access to the hash lists */
3881 for (i = 0; i < hash->size; i++) {
3882 head = &hash->table[i];
3883 list_lock = &hash->list_locks[i];
3885 spin_lock_bh(list_lock);
3886 hlist_for_each_entry_safe(tt_common, node_tmp, head,
3888 if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING))
3891 batadv_dbg(BATADV_DBG_TT, bat_priv,
3892 "Deleting local tt entry (%pM, vid: %d): pending\n",
3894 batadv_print_vid(tt_common->vid));
3896 batadv_tt_local_size_dec(bat_priv, tt_common->vid);
3897 hlist_del_rcu(&tt_common->hash_entry);
3898 tt_local = container_of(tt_common,
3899 struct batadv_tt_local_entry,
3902 batadv_tt_local_entry_put(tt_local);
3904 spin_unlock_bh(list_lock);
3909 * batadv_tt_local_commit_changes_nolock() - commit all pending local tt changes
3910 * which have been queued in the time since the last commit
3911 * @bat_priv: the bat priv with all the soft interface information
3913 * Caller must hold tt->commit_lock.
3915 static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv)
3917 lockdep_assert_held(&bat_priv->tt.commit_lock);
3919 if (atomic_read(&bat_priv->tt.local_changes) < 1) {
3920 if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt))
3921 batadv_tt_tvlv_container_update(bat_priv);
3925 batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true);
3927 batadv_tt_local_purge_pending_clients(bat_priv);
3928 batadv_tt_local_update_crc(bat_priv);
3930 /* Increment the TTVN only once per OGM interval */
3931 atomic_inc(&bat_priv->tt.vn);
3932 batadv_dbg(BATADV_DBG_TT, bat_priv,
3933 "Local changes committed, updating to ttvn %u\n",
3934 (u8)atomic_read(&bat_priv->tt.vn));
3936 /* reset the sending counter */
3937 atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX);
3938 batadv_tt_tvlv_container_update(bat_priv);
3942 * batadv_tt_local_commit_changes() - commit all pending local tt changes which
3943 * have been queued in the time since the last commit
3944 * @bat_priv: the bat priv with all the soft interface information
3946 void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv)
3948 spin_lock_bh(&bat_priv->tt.commit_lock);
3949 batadv_tt_local_commit_changes_nolock(bat_priv);
3950 spin_unlock_bh(&bat_priv->tt.commit_lock);
3954 * batadv_is_ap_isolated() - Check if packet from upper layer should be dropped
3955 * @bat_priv: the bat priv with all the soft interface information
3956 * @src: source mac address of packet
3957 * @dst: destination mac address of packet
3958 * @vid: vlan id of packet
3960 * Return: true when src+dst(+vid) pair should be isolated, false otherwise
3962 bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst,
3965 struct batadv_tt_local_entry *tt_local_entry;
3966 struct batadv_tt_global_entry *tt_global_entry;
3967 struct batadv_softif_vlan *vlan;
3970 vlan = batadv_softif_vlan_get(bat_priv, vid);
3974 if (!atomic_read(&vlan->ap_isolation))
3977 tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid);
3978 if (!tt_local_entry)
3981 tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid);
3982 if (!tt_global_entry)
3983 goto local_entry_put;
3985 if (_batadv_is_ap_isolated(tt_local_entry, tt_global_entry))
3988 batadv_tt_global_entry_put(tt_global_entry);
3990 batadv_tt_local_entry_put(tt_local_entry);
3992 batadv_softif_vlan_put(vlan);
3997 * batadv_tt_update_orig() - update global translation table with new tt
3998 * information received via ogms
3999 * @bat_priv: the bat priv with all the soft interface information
4000 * @orig_node: the orig_node of the ogm
4001 * @tt_buff: pointer to the first tvlv VLAN entry
4002 * @tt_num_vlan: number of tvlv VLAN entries
4003 * @tt_change: pointer to the first entry in the TT buffer
4004 * @tt_num_changes: number of tt changes inside the tt buffer
4005 * @ttvn: translation table version number of this changeset
4007 static void batadv_tt_update_orig(struct batadv_priv *bat_priv,
4008 struct batadv_orig_node *orig_node,
4009 const void *tt_buff, u16 tt_num_vlan,
4010 struct batadv_tvlv_tt_change *tt_change,
4011 u16 tt_num_changes, u8 ttvn)
4013 u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn);
4014 struct batadv_tvlv_tt_vlan_data *tt_vlan;
4015 bool full_table = true;
4018 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff;
4019 has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT,
4020 &orig_node->capa_initialized);
4022 /* orig table not initialised AND first diff is in the OGM OR the ttvn
4023 * increased by one -> we can apply the attached changes
4025 if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) {
4026 /* the OGM could not contain the changes due to their size or
4027 * because they have already been sent BATADV_TT_OGM_APPEND_MAX
4029 * In this case send a tt request
4031 if (!tt_num_changes) {
4036 spin_lock_bh(&orig_node->tt_lock);
4038 batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes,
4041 /* Even if we received the precomputed crc with the OGM, we
4042 * prefer to recompute it to spot any possible inconsistency
4043 * in the global table
4045 batadv_tt_global_update_crc(bat_priv, orig_node);
4047 spin_unlock_bh(&orig_node->tt_lock);
4049 /* The ttvn alone is not enough to guarantee consistency
4050 * because a single value could represent different states
4051 * (due to the wrap around). Thus a node has to check whether
4052 * the resulting table (after applying the changes) is still
4053 * consistent or not. E.g. a node could disconnect while its
4054 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
4055 * checking the CRC value is mandatory to detect the
4058 if (!batadv_tt_global_check_crc(orig_node, tt_vlan,
4062 /* if we missed more than one change or our tables are not
4063 * in sync anymore -> request fresh tt data
4065 if (!has_tt_init || ttvn != orig_ttvn ||
4066 !batadv_tt_global_check_crc(orig_node, tt_vlan,
4069 batadv_dbg(BATADV_DBG_TT, bat_priv,
4070 "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n",
4071 orig_node->orig, ttvn, orig_ttvn,
4073 batadv_send_tt_request(bat_priv, orig_node, ttvn,
4074 tt_vlan, tt_num_vlan,
4082 * batadv_tt_global_client_is_roaming() - check if a client is marked as roaming
4083 * @bat_priv: the bat priv with all the soft interface information
4084 * @addr: the mac address of the client to check
4085 * @vid: VLAN identifier
4087 * Return: true if we know that the client has moved from its old originator
4088 * to another one. This entry is still kept for consistency purposes and will be
4089 * deleted later by a DEL or because of timeout
4091 bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv,
4092 u8 *addr, unsigned short vid)
4094 struct batadv_tt_global_entry *tt_global_entry;
4097 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
4098 if (!tt_global_entry)
4101 ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM;
4102 batadv_tt_global_entry_put(tt_global_entry);
4108 * batadv_tt_local_client_is_roaming() - tells whether the client is roaming
4109 * @bat_priv: the bat priv with all the soft interface information
4110 * @addr: the mac address of the local client to query
4111 * @vid: VLAN identifier
4113 * Return: true if the local client is known to be roaming (it is not served by
4114 * this node anymore) or not. If yes, the client is still present in the table
4115 * to keep the latter consistent with the node TTVN
4117 bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv,
4118 u8 *addr, unsigned short vid)
4120 struct batadv_tt_local_entry *tt_local_entry;
4123 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
4124 if (!tt_local_entry)
4127 ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM;
4128 batadv_tt_local_entry_put(tt_local_entry);
4134 * batadv_tt_add_temporary_global_entry() - Add temporary entry to global TT
4135 * @bat_priv: the bat priv with all the soft interface information
4136 * @orig_node: orig node which the temporary entry should be associated with
4137 * @addr: mac address of the client
4138 * @vid: VLAN id of the new temporary global translation table
4140 * Return: true when temporary tt entry could be added, false otherwise
4142 bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv,
4143 struct batadv_orig_node *orig_node,
4144 const unsigned char *addr,
4147 /* ignore loop detect macs, they are not supposed to be in the tt local
4150 if (batadv_bla_is_loopdetect_mac(addr))
4153 if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid,
4154 BATADV_TT_CLIENT_TEMP,
4155 atomic_read(&orig_node->last_ttvn)))
4158 batadv_dbg(BATADV_DBG_TT, bat_priv,
4159 "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n",
4160 addr, batadv_print_vid(vid), orig_node->orig);
4166 * batadv_tt_local_resize_to_mtu() - resize the local translation table fit the
4167 * maximum packet size that can be transported through the mesh
4168 * @soft_iface: netdev struct of the mesh interface
4170 * Remove entries older than 'timeout' and half timeout if more entries need
4173 void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface)
4175 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
4176 int packet_size_max = atomic_read(&bat_priv->packet_size_max);
4177 int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2;
4178 bool reduced = false;
4180 spin_lock_bh(&bat_priv->tt.commit_lock);
4183 table_size = batadv_tt_local_table_transmit_size(bat_priv);
4184 if (packet_size_max >= table_size)
4187 batadv_tt_local_purge(bat_priv, timeout);
4188 batadv_tt_local_purge_pending_clients(bat_priv);
4192 net_ratelimited_function(batadv_info, soft_iface,
4193 "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n",
4197 /* commit these changes immediately, to avoid synchronization problem
4201 batadv_tt_local_commit_changes_nolock(bat_priv);
4203 spin_unlock_bh(&bat_priv->tt.commit_lock);
4207 * batadv_tt_tvlv_ogm_handler_v1() - process incoming tt tvlv container
4208 * @bat_priv: the bat priv with all the soft interface information
4209 * @orig: the orig_node of the ogm
4210 * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
4211 * @tvlv_value: tvlv buffer containing the gateway data
4212 * @tvlv_value_len: tvlv buffer length
4214 static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,
4215 struct batadv_orig_node *orig,
4216 u8 flags, void *tvlv_value,
4219 struct batadv_tvlv_tt_vlan_data *tt_vlan;
4220 struct batadv_tvlv_tt_change *tt_change;
4221 struct batadv_tvlv_tt_data *tt_data;
4222 u16 num_entries, num_vlan;
4224 if (tvlv_value_len < sizeof(*tt_data))
4227 tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
4228 tvlv_value_len -= sizeof(*tt_data);
4230 num_vlan = ntohs(tt_data->num_vlan);
4232 if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan)
4235 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
4236 tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan);
4237 tvlv_value_len -= sizeof(*tt_vlan) * num_vlan;
4239 num_entries = batadv_tt_entries(tvlv_value_len);
4241 batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change,
4242 num_entries, tt_data->ttvn);
4246 * batadv_tt_tvlv_unicast_handler_v1() - process incoming (unicast) tt tvlv
4248 * @bat_priv: the bat priv with all the soft interface information
4249 * @src: mac address of tt tvlv sender
4250 * @dst: mac address of tt tvlv recipient
4251 * @tvlv_value: tvlv buffer containing the tt data
4252 * @tvlv_value_len: tvlv buffer length
4254 * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS
4257 static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
4262 struct batadv_tvlv_tt_data *tt_data;
4263 u16 tt_vlan_len, tt_num_entries;
4267 if (tvlv_value_len < sizeof(*tt_data))
4268 return NET_RX_SUCCESS;
4270 tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
4271 tvlv_value_len -= sizeof(*tt_data);
4273 tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data);
4274 tt_vlan_len *= ntohs(tt_data->num_vlan);
4276 if (tvlv_value_len < tt_vlan_len)
4277 return NET_RX_SUCCESS;
4279 tvlv_value_len -= tt_vlan_len;
4280 tt_num_entries = batadv_tt_entries(tvlv_value_len);
4282 switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) {
4283 case BATADV_TT_REQUEST:
4284 batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX);
4286 /* If this node cannot provide a TT response the tt_request is
4289 ret = batadv_send_tt_response(bat_priv, tt_data, src, dst);
4291 if (tt_data->flags & BATADV_TT_FULL_TABLE)
4296 batadv_dbg(BATADV_DBG_TT, bat_priv,
4297 "Routing TT_REQUEST to %pM [%c]\n",
4299 /* tvlv API will re-route the packet */
4303 case BATADV_TT_RESPONSE:
4304 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX);
4306 if (batadv_is_my_mac(bat_priv, dst)) {
4307 batadv_handle_tt_response(bat_priv, tt_data,
4308 src, tt_num_entries);
4309 return NET_RX_SUCCESS;
4312 if (tt_data->flags & BATADV_TT_FULL_TABLE)
4317 batadv_dbg(BATADV_DBG_TT, bat_priv,
4318 "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag);
4320 /* tvlv API will re-route the packet */
4324 return NET_RX_SUCCESS;
4328 * batadv_roam_tvlv_unicast_handler_v1() - process incoming tt roam tvlv
4330 * @bat_priv: the bat priv with all the soft interface information
4331 * @src: mac address of tt tvlv sender
4332 * @dst: mac address of tt tvlv recipient
4333 * @tvlv_value: tvlv buffer containing the tt data
4334 * @tvlv_value_len: tvlv buffer length
4336 * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS
4339 static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
4344 struct batadv_tvlv_roam_adv *roaming_adv;
4345 struct batadv_orig_node *orig_node = NULL;
4347 /* If this node is not the intended recipient of the
4348 * roaming advertisement the packet is forwarded
4349 * (the tvlv API will re-route the packet).
4351 if (!batadv_is_my_mac(bat_priv, dst))
4354 if (tvlv_value_len < sizeof(*roaming_adv))
4357 orig_node = batadv_orig_hash_find(bat_priv, src);
4361 batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX);
4362 roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value;
4364 batadv_dbg(BATADV_DBG_TT, bat_priv,
4365 "Received ROAMING_ADV from %pM (client %pM)\n",
4366 src, roaming_adv->client);
4368 batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client,
4369 ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM,
4370 atomic_read(&orig_node->last_ttvn) + 1);
4374 batadv_orig_node_put(orig_node);
4375 return NET_RX_SUCCESS;
4379 * batadv_tt_init() - initialise the translation table internals
4380 * @bat_priv: the bat priv with all the soft interface information
4382 * Return: 0 on success or negative error number in case of failure.
4384 int batadv_tt_init(struct batadv_priv *bat_priv)
4388 /* synchronized flags must be remote */
4389 BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK));
4391 ret = batadv_tt_local_init(bat_priv);
4395 ret = batadv_tt_global_init(bat_priv);
4399 batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1,
4400 batadv_tt_tvlv_unicast_handler_v1,
4401 BATADV_TVLV_TT, 1, BATADV_NO_FLAGS);
4403 batadv_tvlv_handler_register(bat_priv, NULL,
4404 batadv_roam_tvlv_unicast_handler_v1,
4405 BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS);
4407 INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge);
4408 queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
4409 msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
4415 * batadv_tt_global_is_isolated() - check if a client is marked as isolated
4416 * @bat_priv: the bat priv with all the soft interface information
4417 * @addr: the mac address of the client
4418 * @vid: the identifier of the VLAN where this client is connected
4420 * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false
4423 bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv,
4424 const u8 *addr, unsigned short vid)
4426 struct batadv_tt_global_entry *tt;
4429 tt = batadv_tt_global_hash_find(bat_priv, addr, vid);
4433 ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA;
4435 batadv_tt_global_entry_put(tt);
4441 * batadv_tt_cache_init() - Initialize tt memory object cache
4443 * Return: 0 on success or negative error number in case of failure.
4445 int __init batadv_tt_cache_init(void)
4447 size_t tl_size = sizeof(struct batadv_tt_local_entry);
4448 size_t tg_size = sizeof(struct batadv_tt_global_entry);
4449 size_t tt_orig_size = sizeof(struct batadv_tt_orig_list_entry);
4450 size_t tt_change_size = sizeof(struct batadv_tt_change_node);
4451 size_t tt_req_size = sizeof(struct batadv_tt_req_node);
4452 size_t tt_roam_size = sizeof(struct batadv_tt_roam_node);
4454 batadv_tl_cache = kmem_cache_create("batadv_tl_cache", tl_size, 0,
4455 SLAB_HWCACHE_ALIGN, NULL);
4456 if (!batadv_tl_cache)
4459 batadv_tg_cache = kmem_cache_create("batadv_tg_cache", tg_size, 0,
4460 SLAB_HWCACHE_ALIGN, NULL);
4461 if (!batadv_tg_cache)
4462 goto err_tt_tl_destroy;
4464 batadv_tt_orig_cache = kmem_cache_create("batadv_tt_orig_cache",
4466 SLAB_HWCACHE_ALIGN, NULL);
4467 if (!batadv_tt_orig_cache)
4468 goto err_tt_tg_destroy;
4470 batadv_tt_change_cache = kmem_cache_create("batadv_tt_change_cache",
4472 SLAB_HWCACHE_ALIGN, NULL);
4473 if (!batadv_tt_change_cache)
4474 goto err_tt_orig_destroy;
4476 batadv_tt_req_cache = kmem_cache_create("batadv_tt_req_cache",
4478 SLAB_HWCACHE_ALIGN, NULL);
4479 if (!batadv_tt_req_cache)
4480 goto err_tt_change_destroy;
4482 batadv_tt_roam_cache = kmem_cache_create("batadv_tt_roam_cache",
4484 SLAB_HWCACHE_ALIGN, NULL);
4485 if (!batadv_tt_roam_cache)
4486 goto err_tt_req_destroy;
4491 kmem_cache_destroy(batadv_tt_req_cache);
4492 batadv_tt_req_cache = NULL;
4493 err_tt_change_destroy:
4494 kmem_cache_destroy(batadv_tt_change_cache);
4495 batadv_tt_change_cache = NULL;
4496 err_tt_orig_destroy:
4497 kmem_cache_destroy(batadv_tt_orig_cache);
4498 batadv_tt_orig_cache = NULL;
4500 kmem_cache_destroy(batadv_tg_cache);
4501 batadv_tg_cache = NULL;
4503 kmem_cache_destroy(batadv_tl_cache);
4504 batadv_tl_cache = NULL;
4510 * batadv_tt_cache_destroy() - Destroy tt memory object cache
4512 void batadv_tt_cache_destroy(void)
4514 kmem_cache_destroy(batadv_tl_cache);
4515 kmem_cache_destroy(batadv_tg_cache);
4516 kmem_cache_destroy(batadv_tt_orig_cache);
4517 kmem_cache_destroy(batadv_tt_change_cache);
4518 kmem_cache_destroy(batadv_tt_req_cache);
4519 kmem_cache_destroy(batadv_tt_roam_cache);