1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2007-2019 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 * @cb: Control block containing additional options
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,
1156 struct netlink_callback *cb,
1157 struct batadv_priv *bat_priv,
1158 struct batadv_tt_common_entry *common)
1161 struct batadv_softif_vlan *vlan;
1162 struct batadv_tt_local_entry *local;
1163 unsigned int last_seen_msecs;
1166 local = container_of(common, struct batadv_tt_local_entry, common);
1167 last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen);
1169 vlan = batadv_softif_vlan_get(bat_priv, common->vid);
1175 batadv_softif_vlan_put(vlan);
1177 hdr = genlmsg_put(msg, portid, cb->nlh->nlmsg_seq,
1178 &batadv_netlink_family, NLM_F_MULTI,
1179 BATADV_CMD_GET_TRANSTABLE_LOCAL);
1183 genl_dump_check_consistent(cb, hdr);
1185 if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) ||
1186 nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) ||
1187 nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) ||
1188 nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags))
1189 goto nla_put_failure;
1191 if (!(common->flags & BATADV_TT_CLIENT_NOPURGE) &&
1192 nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, last_seen_msecs))
1193 goto nla_put_failure;
1195 genlmsg_end(msg, hdr);
1199 genlmsg_cancel(msg, hdr);
1204 * batadv_tt_local_dump_bucket() - Dump one TT local bucket into a message
1205 * @msg: Netlink message to dump into
1206 * @portid: Port making netlink request
1207 * @cb: Control block containing additional options
1208 * @bat_priv: The bat priv with all the soft interface information
1209 * @hash: hash to dump
1210 * @bucket: bucket index to dump
1211 * @idx_s: Number of entries to skip
1213 * Return: Error code, or 0 on success
1216 batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid,
1217 struct netlink_callback *cb,
1218 struct batadv_priv *bat_priv,
1219 struct batadv_hashtable *hash, unsigned int bucket,
1222 struct batadv_tt_common_entry *common;
1225 spin_lock_bh(&hash->list_locks[bucket]);
1226 cb->seq = atomic_read(&hash->generation) << 1 | 1;
1228 hlist_for_each_entry(common, &hash->table[bucket], hash_entry) {
1232 if (batadv_tt_local_dump_entry(msg, portid, cb, bat_priv,
1234 spin_unlock_bh(&hash->list_locks[bucket]);
1239 spin_unlock_bh(&hash->list_locks[bucket]);
1246 * batadv_tt_local_dump() - Dump TT local entries into a message
1247 * @msg: Netlink message to dump into
1248 * @cb: Parameters from query
1250 * Return: Error code, or 0 on success
1252 int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb)
1254 struct net *net = sock_net(cb->skb->sk);
1255 struct net_device *soft_iface;
1256 struct batadv_priv *bat_priv;
1257 struct batadv_hard_iface *primary_if = NULL;
1258 struct batadv_hashtable *hash;
1261 int bucket = cb->args[0];
1262 int idx = cb->args[1];
1263 int portid = NETLINK_CB(cb->skb).portid;
1265 ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
1269 soft_iface = dev_get_by_index(net, ifindex);
1270 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
1275 bat_priv = netdev_priv(soft_iface);
1277 primary_if = batadv_primary_if_get_selected(bat_priv);
1278 if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
1283 hash = bat_priv->tt.local_hash;
1285 while (bucket < hash->size) {
1286 if (batadv_tt_local_dump_bucket(msg, portid, cb, bat_priv,
1287 hash, bucket, &idx))
1297 batadv_hardif_put(primary_if);
1299 dev_put(soft_iface);
1301 cb->args[0] = bucket;
1308 batadv_tt_local_set_pending(struct batadv_priv *bat_priv,
1309 struct batadv_tt_local_entry *tt_local_entry,
1310 u16 flags, const char *message)
1312 batadv_tt_local_event(bat_priv, tt_local_entry, flags);
1314 /* The local client has to be marked as "pending to be removed" but has
1315 * to be kept in the table in order to send it in a full table
1316 * response issued before the net ttvn increment (consistency check)
1318 tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING;
1320 batadv_dbg(BATADV_DBG_TT, bat_priv,
1321 "Local tt entry (%pM, vid: %d) pending to be removed: %s\n",
1322 tt_local_entry->common.addr,
1323 batadv_print_vid(tt_local_entry->common.vid), message);
1327 * batadv_tt_local_remove() - logically remove an entry from the local table
1328 * @bat_priv: the bat priv with all the soft interface information
1329 * @addr: the MAC address of the client to remove
1330 * @vid: VLAN identifier
1331 * @message: message to append to the log on deletion
1332 * @roaming: true if the deletion is due to a roaming event
1334 * Return: the flags assigned to the local entry before being deleted
1336 u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr,
1337 unsigned short vid, const char *message,
1340 struct batadv_tt_local_entry *tt_local_entry;
1341 u16 flags, curr_flags = BATADV_NO_FLAGS;
1342 void *tt_entry_exists;
1344 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
1345 if (!tt_local_entry)
1348 curr_flags = tt_local_entry->common.flags;
1350 flags = BATADV_TT_CLIENT_DEL;
1351 /* if this global entry addition is due to a roaming, the node has to
1352 * mark the local entry as "roamed" in order to correctly reroute
1356 flags |= BATADV_TT_CLIENT_ROAM;
1357 /* mark the local client as ROAMed */
1358 tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM;
1361 if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) {
1362 batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags,
1366 /* if this client has been added right now, it is possible to
1367 * immediately purge it
1369 batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL);
1371 tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash,
1374 &tt_local_entry->common);
1375 if (!tt_entry_exists)
1378 /* extra call to free the local tt entry */
1379 batadv_tt_local_entry_put(tt_local_entry);
1383 batadv_tt_local_entry_put(tt_local_entry);
1389 * batadv_tt_local_purge_list() - purge inactive tt local entries
1390 * @bat_priv: the bat priv with all the soft interface information
1391 * @head: pointer to the list containing the local tt entries
1392 * @timeout: parameter deciding whether a given tt local entry is considered
1395 static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv,
1396 struct hlist_head *head,
1399 struct batadv_tt_local_entry *tt_local_entry;
1400 struct batadv_tt_common_entry *tt_common_entry;
1401 struct hlist_node *node_tmp;
1403 hlist_for_each_entry_safe(tt_common_entry, node_tmp, head,
1405 tt_local_entry = container_of(tt_common_entry,
1406 struct batadv_tt_local_entry,
1408 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE)
1411 /* entry already marked for deletion */
1412 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)
1415 if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout))
1418 batadv_tt_local_set_pending(bat_priv, tt_local_entry,
1419 BATADV_TT_CLIENT_DEL, "timed out");
1424 * batadv_tt_local_purge() - purge inactive tt local entries
1425 * @bat_priv: the bat priv with all the soft interface information
1426 * @timeout: parameter deciding whether a given tt local entry is considered
1429 static void batadv_tt_local_purge(struct batadv_priv *bat_priv,
1432 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
1433 struct hlist_head *head;
1434 spinlock_t *list_lock; /* protects write access to the hash lists */
1437 for (i = 0; i < hash->size; i++) {
1438 head = &hash->table[i];
1439 list_lock = &hash->list_locks[i];
1441 spin_lock_bh(list_lock);
1442 batadv_tt_local_purge_list(bat_priv, head, timeout);
1443 spin_unlock_bh(list_lock);
1447 static void batadv_tt_local_table_free(struct batadv_priv *bat_priv)
1449 struct batadv_hashtable *hash;
1450 spinlock_t *list_lock; /* protects write access to the hash lists */
1451 struct batadv_tt_common_entry *tt_common_entry;
1452 struct batadv_tt_local_entry *tt_local;
1453 struct hlist_node *node_tmp;
1454 struct hlist_head *head;
1457 if (!bat_priv->tt.local_hash)
1460 hash = bat_priv->tt.local_hash;
1462 for (i = 0; i < hash->size; i++) {
1463 head = &hash->table[i];
1464 list_lock = &hash->list_locks[i];
1466 spin_lock_bh(list_lock);
1467 hlist_for_each_entry_safe(tt_common_entry, node_tmp,
1469 hlist_del_rcu(&tt_common_entry->hash_entry);
1470 tt_local = container_of(tt_common_entry,
1471 struct batadv_tt_local_entry,
1474 batadv_tt_local_entry_put(tt_local);
1476 spin_unlock_bh(list_lock);
1479 batadv_hash_destroy(hash);
1481 bat_priv->tt.local_hash = NULL;
1484 static int batadv_tt_global_init(struct batadv_priv *bat_priv)
1486 if (bat_priv->tt.global_hash)
1489 bat_priv->tt.global_hash = batadv_hash_new(1024);
1491 if (!bat_priv->tt.global_hash)
1494 batadv_hash_set_lock_class(bat_priv->tt.global_hash,
1495 &batadv_tt_global_hash_lock_class_key);
1500 static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv)
1502 struct batadv_tt_change_node *entry, *safe;
1504 spin_lock_bh(&bat_priv->tt.changes_list_lock);
1506 list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
1508 list_del(&entry->list);
1509 kmem_cache_free(batadv_tt_change_cache, entry);
1512 atomic_set(&bat_priv->tt.local_changes, 0);
1513 spin_unlock_bh(&bat_priv->tt.changes_list_lock);
1517 * batadv_tt_global_orig_entry_find() - find a TT orig_list_entry
1518 * @entry: the TT global entry where the orig_list_entry has to be
1520 * @orig_node: the originator for which the orig_list_entry has to be found
1522 * retrieve the orig_tt_list_entry belonging to orig_node from the
1523 * batadv_tt_global_entry list
1525 * Return: it with an increased refcounter, NULL if not found
1527 static struct batadv_tt_orig_list_entry *
1528 batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry,
1529 const struct batadv_orig_node *orig_node)
1531 struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL;
1532 const struct hlist_head *head;
1535 head = &entry->orig_list;
1536 hlist_for_each_entry_rcu(tmp_orig_entry, head, list) {
1537 if (tmp_orig_entry->orig_node != orig_node)
1539 if (!kref_get_unless_zero(&tmp_orig_entry->refcount))
1542 orig_entry = tmp_orig_entry;
1551 * batadv_tt_global_entry_has_orig() - check if a TT global entry is also
1552 * handled by a given originator
1553 * @entry: the TT global entry to check
1554 * @orig_node: the originator to search in the list
1555 * @flags: a pointer to store TT flags for the given @entry received
1558 * find out if an orig_node is already in the list of a tt_global_entry.
1560 * Return: true if found, false otherwise
1563 batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry,
1564 const struct batadv_orig_node *orig_node,
1567 struct batadv_tt_orig_list_entry *orig_entry;
1570 orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node);
1575 *flags = orig_entry->flags;
1577 batadv_tt_orig_list_entry_put(orig_entry);
1584 * batadv_tt_global_sync_flags() - update TT sync flags
1585 * @tt_global: the TT global entry to update sync flags in
1587 * Updates the sync flag bits in the tt_global flag attribute with a logical
1588 * OR of all sync flags from any of its TT orig entries.
1591 batadv_tt_global_sync_flags(struct batadv_tt_global_entry *tt_global)
1593 struct batadv_tt_orig_list_entry *orig_entry;
1594 const struct hlist_head *head;
1595 u16 flags = BATADV_NO_FLAGS;
1598 head = &tt_global->orig_list;
1599 hlist_for_each_entry_rcu(orig_entry, head, list)
1600 flags |= orig_entry->flags;
1603 flags |= tt_global->common.flags & (~BATADV_TT_SYNC_MASK);
1604 tt_global->common.flags = flags;
1608 * batadv_tt_global_orig_entry_add() - add or update a TT orig entry
1609 * @tt_global: the TT global entry to add an orig entry in
1610 * @orig_node: the originator to add an orig entry for
1611 * @ttvn: translation table version number of this changeset
1612 * @flags: TT sync flags
1615 batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global,
1616 struct batadv_orig_node *orig_node, int ttvn,
1619 struct batadv_tt_orig_list_entry *orig_entry;
1621 spin_lock_bh(&tt_global->list_lock);
1623 orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node);
1625 /* refresh the ttvn: the current value could be a bogus one that
1626 * was added during a "temporary client detection"
1628 orig_entry->ttvn = ttvn;
1629 orig_entry->flags = flags;
1633 orig_entry = kmem_cache_zalloc(batadv_tt_orig_cache, GFP_ATOMIC);
1637 INIT_HLIST_NODE(&orig_entry->list);
1638 kref_get(&orig_node->refcount);
1639 batadv_tt_global_size_inc(orig_node, tt_global->common.vid);
1640 orig_entry->orig_node = orig_node;
1641 orig_entry->ttvn = ttvn;
1642 orig_entry->flags = flags;
1643 kref_init(&orig_entry->refcount);
1645 kref_get(&orig_entry->refcount);
1646 hlist_add_head_rcu(&orig_entry->list,
1647 &tt_global->orig_list);
1648 atomic_inc(&tt_global->orig_list_count);
1651 batadv_tt_global_sync_flags(tt_global);
1654 batadv_tt_orig_list_entry_put(orig_entry);
1656 spin_unlock_bh(&tt_global->list_lock);
1660 * batadv_tt_global_add() - add a new TT global entry or update an existing one
1661 * @bat_priv: the bat priv with all the soft interface information
1662 * @orig_node: the originator announcing the client
1663 * @tt_addr: the mac address of the non-mesh client
1664 * @vid: VLAN identifier
1665 * @flags: TT flags that have to be set for this non-mesh client
1666 * @ttvn: the tt version number ever announcing this non-mesh client
1668 * Add a new TT global entry for the given originator. If the entry already
1669 * exists add a new reference to the given originator (a global entry can have
1670 * references to multiple originators) and adjust the flags attribute to reflect
1671 * the function argument.
1672 * If a TT local entry exists for this non-mesh client remove it.
1674 * The caller must hold orig_node refcount.
1676 * Return: true if the new entry has been added, false otherwise
1678 static bool batadv_tt_global_add(struct batadv_priv *bat_priv,
1679 struct batadv_orig_node *orig_node,
1680 const unsigned char *tt_addr,
1681 unsigned short vid, u16 flags, u8 ttvn)
1683 struct batadv_tt_global_entry *tt_global_entry;
1684 struct batadv_tt_local_entry *tt_local_entry;
1687 struct batadv_tt_common_entry *common;
1690 /* ignore global entries from backbone nodes */
1691 if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid))
1694 tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid);
1695 tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid);
1697 /* if the node already has a local client for this entry, it has to wait
1698 * for a roaming advertisement instead of manually messing up the global
1701 if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry &&
1702 !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW))
1705 if (!tt_global_entry) {
1706 tt_global_entry = kmem_cache_zalloc(batadv_tg_cache,
1708 if (!tt_global_entry)
1711 common = &tt_global_entry->common;
1712 ether_addr_copy(common->addr, tt_addr);
1715 if (!is_multicast_ether_addr(common->addr))
1716 common->flags = flags & (~BATADV_TT_SYNC_MASK);
1718 tt_global_entry->roam_at = 0;
1719 /* node must store current time in case of roaming. This is
1720 * needed to purge this entry out on timeout (if nobody claims
1723 if (flags & BATADV_TT_CLIENT_ROAM)
1724 tt_global_entry->roam_at = jiffies;
1725 kref_init(&common->refcount);
1726 common->added_at = jiffies;
1728 INIT_HLIST_HEAD(&tt_global_entry->orig_list);
1729 atomic_set(&tt_global_entry->orig_list_count, 0);
1730 spin_lock_init(&tt_global_entry->list_lock);
1732 kref_get(&common->refcount);
1733 hash_added = batadv_hash_add(bat_priv->tt.global_hash,
1735 batadv_choose_tt, common,
1736 &common->hash_entry);
1738 if (unlikely(hash_added != 0)) {
1739 /* remove the reference for the hash */
1740 batadv_tt_global_entry_put(tt_global_entry);
1744 common = &tt_global_entry->common;
1745 /* If there is already a global entry, we can use this one for
1747 * But if we are trying to add a temporary client then here are
1748 * two options at this point:
1749 * 1) the global client is not a temporary client: the global
1750 * client has to be left as it is, temporary information
1751 * should never override any already known client state
1752 * 2) the global client is a temporary client: purge the
1753 * originator list and add the new one orig_entry
1755 if (flags & BATADV_TT_CLIENT_TEMP) {
1756 if (!(common->flags & BATADV_TT_CLIENT_TEMP))
1758 if (batadv_tt_global_entry_has_orig(tt_global_entry,
1761 batadv_tt_global_del_orig_list(tt_global_entry);
1762 goto add_orig_entry;
1765 /* if the client was temporary added before receiving the first
1766 * OGM announcing it, we have to clear the TEMP flag. Also,
1767 * remove the previous temporary orig node and re-add it
1768 * if required. If the orig entry changed, the new one which
1769 * is a non-temporary entry is preferred.
1771 if (common->flags & BATADV_TT_CLIENT_TEMP) {
1772 batadv_tt_global_del_orig_list(tt_global_entry);
1773 common->flags &= ~BATADV_TT_CLIENT_TEMP;
1776 /* the change can carry possible "attribute" flags like the
1777 * TT_CLIENT_TEMP, therefore they have to be copied in the
1780 if (!is_multicast_ether_addr(common->addr))
1781 common->flags |= flags & (~BATADV_TT_SYNC_MASK);
1783 /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only
1784 * one originator left in the list and we previously received a
1785 * delete + roaming change for this originator.
1787 * We should first delete the old originator before adding the
1790 if (common->flags & BATADV_TT_CLIENT_ROAM) {
1791 batadv_tt_global_del_orig_list(tt_global_entry);
1792 common->flags &= ~BATADV_TT_CLIENT_ROAM;
1793 tt_global_entry->roam_at = 0;
1797 /* add the new orig_entry (if needed) or update it */
1798 batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn,
1799 flags & BATADV_TT_SYNC_MASK);
1801 batadv_dbg(BATADV_DBG_TT, bat_priv,
1802 "Creating new global tt entry: %pM (vid: %d, via %pM)\n",
1803 common->addr, batadv_print_vid(common->vid),
1808 /* Do not remove multicast addresses from the local hash on
1811 if (is_multicast_ether_addr(tt_addr))
1814 /* remove address from local hash if present */
1815 local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid,
1816 "global tt received",
1817 flags & BATADV_TT_CLIENT_ROAM);
1818 tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI;
1820 if (!(flags & BATADV_TT_CLIENT_ROAM))
1821 /* this is a normal global add. Therefore the client is not in a
1822 * roaming state anymore.
1824 tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM;
1827 if (tt_global_entry)
1828 batadv_tt_global_entry_put(tt_global_entry);
1830 batadv_tt_local_entry_put(tt_local_entry);
1835 * batadv_transtable_best_orig() - Get best originator list entry from tt entry
1836 * @bat_priv: the bat priv with all the soft interface information
1837 * @tt_global_entry: global translation table entry to be analyzed
1839 * This functon assumes the caller holds rcu_read_lock().
1840 * Return: best originator list entry or NULL on errors.
1842 static struct batadv_tt_orig_list_entry *
1843 batadv_transtable_best_orig(struct batadv_priv *bat_priv,
1844 struct batadv_tt_global_entry *tt_global_entry)
1846 struct batadv_neigh_node *router, *best_router = NULL;
1847 struct batadv_algo_ops *bao = bat_priv->algo_ops;
1848 struct hlist_head *head;
1849 struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL;
1851 head = &tt_global_entry->orig_list;
1852 hlist_for_each_entry_rcu(orig_entry, head, list) {
1853 router = batadv_orig_router_get(orig_entry->orig_node,
1859 bao->neigh.cmp(router, BATADV_IF_DEFAULT, best_router,
1860 BATADV_IF_DEFAULT) <= 0) {
1861 batadv_neigh_node_put(router);
1865 /* release the refcount for the "old" best */
1867 batadv_neigh_node_put(best_router);
1869 best_entry = orig_entry;
1870 best_router = router;
1874 batadv_neigh_node_put(best_router);
1879 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1881 * batadv_tt_global_print_entry() - print all orig nodes who announce the
1882 * address for this global entry
1883 * @bat_priv: the bat priv with all the soft interface information
1884 * @tt_global_entry: global translation table entry to be printed
1885 * @seq: debugfs table seq_file struct
1887 * This functon assumes the caller holds rcu_read_lock().
1890 batadv_tt_global_print_entry(struct batadv_priv *bat_priv,
1891 struct batadv_tt_global_entry *tt_global_entry,
1892 struct seq_file *seq)
1894 struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
1895 struct batadv_tt_common_entry *tt_common_entry;
1896 struct batadv_orig_node_vlan *vlan;
1897 struct hlist_head *head;
1901 tt_common_entry = &tt_global_entry->common;
1902 flags = tt_common_entry->flags;
1904 best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
1906 vlan = batadv_orig_node_vlan_get(best_entry->orig_node,
1907 tt_common_entry->vid);
1910 " * Cannot retrieve VLAN %d for originator %pM\n",
1911 batadv_print_vid(tt_common_entry->vid),
1912 best_entry->orig_node->orig);
1916 last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn);
1918 " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1919 '*', tt_global_entry->common.addr,
1920 batadv_print_vid(tt_global_entry->common.vid),
1921 best_entry->ttvn, best_entry->orig_node->orig,
1922 last_ttvn, vlan->tt.crc,
1923 ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'),
1924 ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'),
1925 ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'),
1926 ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.'));
1928 batadv_orig_node_vlan_put(vlan);
1932 head = &tt_global_entry->orig_list;
1934 hlist_for_each_entry_rcu(orig_entry, head, list) {
1935 if (best_entry == orig_entry)
1938 vlan = batadv_orig_node_vlan_get(orig_entry->orig_node,
1939 tt_common_entry->vid);
1942 " + Cannot retrieve VLAN %d for originator %pM\n",
1943 batadv_print_vid(tt_common_entry->vid),
1944 orig_entry->orig_node->orig);
1948 last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn);
1950 " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1951 '+', tt_global_entry->common.addr,
1952 batadv_print_vid(tt_global_entry->common.vid),
1953 orig_entry->ttvn, orig_entry->orig_node->orig,
1954 last_ttvn, vlan->tt.crc,
1955 ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'),
1956 ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'),
1957 ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'),
1958 ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.'));
1960 batadv_orig_node_vlan_put(vlan);
1965 * batadv_tt_global_seq_print_text() - Print the global tt table in a seq file
1966 * @seq: seq file to print on
1971 int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset)
1973 struct net_device *net_dev = (struct net_device *)seq->private;
1974 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1975 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
1976 struct batadv_tt_common_entry *tt_common_entry;
1977 struct batadv_tt_global_entry *tt_global;
1978 struct batadv_hard_iface *primary_if;
1979 struct hlist_head *head;
1982 primary_if = batadv_seq_print_text_primary_if_get(seq);
1987 "Globally announced TT entries received via the mesh %s\n",
1990 " Client VID (TTVN) Originator (Curr TTVN) (CRC ) Flags\n");
1992 for (i = 0; i < hash->size; i++) {
1993 head = &hash->table[i];
1996 hlist_for_each_entry_rcu(tt_common_entry,
1998 tt_global = container_of(tt_common_entry,
1999 struct batadv_tt_global_entry,
2001 batadv_tt_global_print_entry(bat_priv, tt_global, seq);
2007 batadv_hardif_put(primary_if);
2013 * batadv_tt_global_dump_subentry() - Dump all TT local entries into a message
2014 * @msg: Netlink message to dump into
2015 * @portid: Port making netlink request
2016 * @seq: Sequence number of netlink message
2017 * @common: tt local & tt global common data
2018 * @orig: Originator node announcing a non-mesh client
2019 * @best: Is the best originator for the TT entry
2021 * Return: Error code, or 0 on success
2024 batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq,
2025 struct batadv_tt_common_entry *common,
2026 struct batadv_tt_orig_list_entry *orig,
2029 u16 flags = (common->flags & (~BATADV_TT_SYNC_MASK)) | orig->flags;
2031 struct batadv_orig_node_vlan *vlan;
2035 vlan = batadv_orig_node_vlan_get(orig->orig_node,
2042 batadv_orig_node_vlan_put(vlan);
2044 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
2046 BATADV_CMD_GET_TRANSTABLE_GLOBAL);
2050 last_ttvn = atomic_read(&orig->orig_node->last_ttvn);
2052 if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) ||
2053 nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN,
2054 orig->orig_node->orig) ||
2055 nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) ||
2056 nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) ||
2057 nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) ||
2058 nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) ||
2059 nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, flags))
2060 goto nla_put_failure;
2062 if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST))
2063 goto nla_put_failure;
2065 genlmsg_end(msg, hdr);
2069 genlmsg_cancel(msg, hdr);
2074 * batadv_tt_global_dump_entry() - Dump one TT global entry into a message
2075 * @msg: Netlink message to dump into
2076 * @portid: Port making netlink request
2077 * @seq: Sequence number of netlink message
2078 * @bat_priv: The bat priv with all the soft interface information
2079 * @common: tt local & tt global common data
2080 * @sub_s: Number of entries to skip
2082 * This function assumes the caller holds rcu_read_lock().
2084 * Return: Error code, or 0 on success
2087 batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
2088 struct batadv_priv *bat_priv,
2089 struct batadv_tt_common_entry *common, int *sub_s)
2091 struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
2092 struct batadv_tt_global_entry *global;
2093 struct hlist_head *head;
2097 global = container_of(common, struct batadv_tt_global_entry, common);
2098 best_entry = batadv_transtable_best_orig(bat_priv, global);
2099 head = &global->orig_list;
2101 hlist_for_each_entry_rcu(orig_entry, head, list) {
2105 best = (orig_entry == best_entry);
2107 if (batadv_tt_global_dump_subentry(msg, portid, seq, common,
2108 orig_entry, best)) {
2119 * batadv_tt_global_dump_bucket() - Dump one TT local bucket into a message
2120 * @msg: Netlink message to dump into
2121 * @portid: Port making netlink request
2122 * @seq: Sequence number of netlink message
2123 * @bat_priv: The bat priv with all the soft interface information
2124 * @head: Pointer to the list containing the global tt entries
2125 * @idx_s: Number of entries to skip
2126 * @sub: Number of entries to skip
2128 * Return: Error code, or 0 on success
2131 batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq,
2132 struct batadv_priv *bat_priv,
2133 struct hlist_head *head, int *idx_s, int *sub)
2135 struct batadv_tt_common_entry *common;
2139 hlist_for_each_entry_rcu(common, head, hash_entry) {
2143 if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv,
2158 * batadv_tt_global_dump() - Dump TT global entries into a message
2159 * @msg: Netlink message to dump into
2160 * @cb: Parameters from query
2162 * Return: Error code, or length of message on success
2164 int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb)
2166 struct net *net = sock_net(cb->skb->sk);
2167 struct net_device *soft_iface;
2168 struct batadv_priv *bat_priv;
2169 struct batadv_hard_iface *primary_if = NULL;
2170 struct batadv_hashtable *hash;
2171 struct hlist_head *head;
2174 int bucket = cb->args[0];
2175 int idx = cb->args[1];
2176 int sub = cb->args[2];
2177 int portid = NETLINK_CB(cb->skb).portid;
2179 ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
2183 soft_iface = dev_get_by_index(net, ifindex);
2184 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
2189 bat_priv = netdev_priv(soft_iface);
2191 primary_if = batadv_primary_if_get_selected(bat_priv);
2192 if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
2197 hash = bat_priv->tt.global_hash;
2199 while (bucket < hash->size) {
2200 head = &hash->table[bucket];
2202 if (batadv_tt_global_dump_bucket(msg, portid,
2203 cb->nlh->nlmsg_seq, bat_priv,
2214 batadv_hardif_put(primary_if);
2216 dev_put(soft_iface);
2218 cb->args[0] = bucket;
2226 * _batadv_tt_global_del_orig_entry() - remove and free an orig_entry
2227 * @tt_global_entry: the global entry to remove the orig_entry from
2228 * @orig_entry: the orig entry to remove and free
2230 * Remove an orig_entry from its list in the given tt_global_entry and
2231 * free this orig_entry afterwards.
2233 * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is
2237 _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry,
2238 struct batadv_tt_orig_list_entry *orig_entry)
2240 lockdep_assert_held(&tt_global_entry->list_lock);
2242 batadv_tt_global_size_dec(orig_entry->orig_node,
2243 tt_global_entry->common.vid);
2244 atomic_dec(&tt_global_entry->orig_list_count);
2245 /* requires holding tt_global_entry->list_lock and orig_entry->list
2246 * being part of a list
2248 hlist_del_rcu(&orig_entry->list);
2249 batadv_tt_orig_list_entry_put(orig_entry);
2252 /* deletes the orig list of a tt_global_entry */
2254 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry)
2256 struct hlist_head *head;
2257 struct hlist_node *safe;
2258 struct batadv_tt_orig_list_entry *orig_entry;
2260 spin_lock_bh(&tt_global_entry->list_lock);
2261 head = &tt_global_entry->orig_list;
2262 hlist_for_each_entry_safe(orig_entry, safe, head, list)
2263 _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry);
2264 spin_unlock_bh(&tt_global_entry->list_lock);
2268 * batadv_tt_global_del_orig_node() - remove orig_node from a global tt entry
2269 * @bat_priv: the bat priv with all the soft interface information
2270 * @tt_global_entry: the global entry to remove the orig_node from
2271 * @orig_node: the originator announcing the client
2272 * @message: message to append to the log on deletion
2274 * Remove the given orig_node and its according orig_entry from the given
2278 batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv,
2279 struct batadv_tt_global_entry *tt_global_entry,
2280 struct batadv_orig_node *orig_node,
2281 const char *message)
2283 struct hlist_head *head;
2284 struct hlist_node *safe;
2285 struct batadv_tt_orig_list_entry *orig_entry;
2288 spin_lock_bh(&tt_global_entry->list_lock);
2289 head = &tt_global_entry->orig_list;
2290 hlist_for_each_entry_safe(orig_entry, safe, head, list) {
2291 if (orig_entry->orig_node == orig_node) {
2292 vid = tt_global_entry->common.vid;
2293 batadv_dbg(BATADV_DBG_TT, bat_priv,
2294 "Deleting %pM from global tt entry %pM (vid: %d): %s\n",
2296 tt_global_entry->common.addr,
2297 batadv_print_vid(vid), message);
2298 _batadv_tt_global_del_orig_entry(tt_global_entry,
2302 spin_unlock_bh(&tt_global_entry->list_lock);
2305 /* If the client is to be deleted, we check if it is the last origantor entry
2306 * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the
2307 * timer, otherwise we simply remove the originator scheduled for deletion.
2310 batadv_tt_global_del_roaming(struct batadv_priv *bat_priv,
2311 struct batadv_tt_global_entry *tt_global_entry,
2312 struct batadv_orig_node *orig_node,
2313 const char *message)
2315 bool last_entry = true;
2316 struct hlist_head *head;
2317 struct batadv_tt_orig_list_entry *orig_entry;
2319 /* no local entry exists, case 1:
2320 * Check if this is the last one or if other entries exist.
2324 head = &tt_global_entry->orig_list;
2325 hlist_for_each_entry_rcu(orig_entry, head, list) {
2326 if (orig_entry->orig_node != orig_node) {
2334 /* its the last one, mark for roaming. */
2335 tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM;
2336 tt_global_entry->roam_at = jiffies;
2338 /* there is another entry, we can simply delete this
2339 * one and can still use the other one.
2341 batadv_tt_global_del_orig_node(bat_priv, tt_global_entry,
2342 orig_node, message);
2347 * batadv_tt_global_del() - remove a client from the global table
2348 * @bat_priv: the bat priv with all the soft interface information
2349 * @orig_node: an originator serving this client
2350 * @addr: the mac address of the client
2351 * @vid: VLAN identifier
2352 * @message: a message explaining the reason for deleting the client to print
2353 * for debugging purpose
2354 * @roaming: true if the deletion has been triggered by a roaming event
2356 static void batadv_tt_global_del(struct batadv_priv *bat_priv,
2357 struct batadv_orig_node *orig_node,
2358 const unsigned char *addr, unsigned short vid,
2359 const char *message, bool roaming)
2361 struct batadv_tt_global_entry *tt_global_entry;
2362 struct batadv_tt_local_entry *local_entry = NULL;
2364 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
2365 if (!tt_global_entry)
2369 batadv_tt_global_del_orig_node(bat_priv, tt_global_entry,
2370 orig_node, message);
2372 if (hlist_empty(&tt_global_entry->orig_list))
2373 batadv_tt_global_free(bat_priv, tt_global_entry,
2379 /* if we are deleting a global entry due to a roam
2380 * event, there are two possibilities:
2381 * 1) the client roamed from node A to node B => if there
2382 * is only one originator left for this client, we mark
2383 * it with BATADV_TT_CLIENT_ROAM, we start a timer and we
2384 * wait for node B to claim it. In case of timeout
2385 * the entry is purged.
2387 * If there are other originators left, we directly delete
2389 * 2) the client roamed to us => we can directly delete
2390 * the global entry, since it is useless now.
2392 local_entry = batadv_tt_local_hash_find(bat_priv,
2393 tt_global_entry->common.addr,
2396 /* local entry exists, case 2: client roamed to us. */
2397 batadv_tt_global_del_orig_list(tt_global_entry);
2398 batadv_tt_global_free(bat_priv, tt_global_entry, message);
2400 /* no local entry exists, case 1: check for roaming */
2401 batadv_tt_global_del_roaming(bat_priv, tt_global_entry,
2402 orig_node, message);
2406 if (tt_global_entry)
2407 batadv_tt_global_entry_put(tt_global_entry);
2409 batadv_tt_local_entry_put(local_entry);
2413 * batadv_tt_global_del_orig() - remove all the TT global entries belonging to
2414 * the given originator matching the provided vid
2415 * @bat_priv: the bat priv with all the soft interface information
2416 * @orig_node: the originator owning the entries to remove
2417 * @match_vid: the VLAN identifier to match. If negative all the entries will be
2419 * @message: debug message to print as "reason"
2421 void batadv_tt_global_del_orig(struct batadv_priv *bat_priv,
2422 struct batadv_orig_node *orig_node,
2424 const char *message)
2426 struct batadv_tt_global_entry *tt_global;
2427 struct batadv_tt_common_entry *tt_common_entry;
2429 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2430 struct hlist_node *safe;
2431 struct hlist_head *head;
2432 spinlock_t *list_lock; /* protects write access to the hash lists */
2438 for (i = 0; i < hash->size; i++) {
2439 head = &hash->table[i];
2440 list_lock = &hash->list_locks[i];
2442 spin_lock_bh(list_lock);
2443 hlist_for_each_entry_safe(tt_common_entry, safe,
2445 /* remove only matching entries */
2446 if (match_vid >= 0 && tt_common_entry->vid != match_vid)
2449 tt_global = container_of(tt_common_entry,
2450 struct batadv_tt_global_entry,
2453 batadv_tt_global_del_orig_node(bat_priv, tt_global,
2454 orig_node, message);
2456 if (hlist_empty(&tt_global->orig_list)) {
2457 vid = tt_global->common.vid;
2458 batadv_dbg(BATADV_DBG_TT, bat_priv,
2459 "Deleting global tt entry %pM (vid: %d): %s\n",
2460 tt_global->common.addr,
2461 batadv_print_vid(vid), message);
2462 hlist_del_rcu(&tt_common_entry->hash_entry);
2463 batadv_tt_global_entry_put(tt_global);
2466 spin_unlock_bh(list_lock);
2468 clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized);
2471 static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global,
2475 unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT;
2476 unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT;
2478 if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) &&
2479 batadv_has_timed_out(tt_global->roam_at, roam_timeout)) {
2481 *msg = "Roaming timeout\n";
2484 if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) &&
2485 batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) {
2487 *msg = "Temporary client timeout\n";
2493 static void batadv_tt_global_purge(struct batadv_priv *bat_priv)
2495 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2496 struct hlist_head *head;
2497 struct hlist_node *node_tmp;
2498 spinlock_t *list_lock; /* protects write access to the hash lists */
2501 struct batadv_tt_common_entry *tt_common;
2502 struct batadv_tt_global_entry *tt_global;
2504 for (i = 0; i < hash->size; i++) {
2505 head = &hash->table[i];
2506 list_lock = &hash->list_locks[i];
2508 spin_lock_bh(list_lock);
2509 hlist_for_each_entry_safe(tt_common, node_tmp, head,
2511 tt_global = container_of(tt_common,
2512 struct batadv_tt_global_entry,
2515 if (!batadv_tt_global_to_purge(tt_global, &msg))
2518 batadv_dbg(BATADV_DBG_TT, bat_priv,
2519 "Deleting global tt entry %pM (vid: %d): %s\n",
2520 tt_global->common.addr,
2521 batadv_print_vid(tt_global->common.vid),
2524 hlist_del_rcu(&tt_common->hash_entry);
2526 batadv_tt_global_entry_put(tt_global);
2528 spin_unlock_bh(list_lock);
2532 static void batadv_tt_global_table_free(struct batadv_priv *bat_priv)
2534 struct batadv_hashtable *hash;
2535 spinlock_t *list_lock; /* protects write access to the hash lists */
2536 struct batadv_tt_common_entry *tt_common_entry;
2537 struct batadv_tt_global_entry *tt_global;
2538 struct hlist_node *node_tmp;
2539 struct hlist_head *head;
2542 if (!bat_priv->tt.global_hash)
2545 hash = bat_priv->tt.global_hash;
2547 for (i = 0; i < hash->size; i++) {
2548 head = &hash->table[i];
2549 list_lock = &hash->list_locks[i];
2551 spin_lock_bh(list_lock);
2552 hlist_for_each_entry_safe(tt_common_entry, node_tmp,
2554 hlist_del_rcu(&tt_common_entry->hash_entry);
2555 tt_global = container_of(tt_common_entry,
2556 struct batadv_tt_global_entry,
2558 batadv_tt_global_entry_put(tt_global);
2560 spin_unlock_bh(list_lock);
2563 batadv_hash_destroy(hash);
2565 bat_priv->tt.global_hash = NULL;
2569 _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry,
2570 struct batadv_tt_global_entry *tt_global_entry)
2572 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI &&
2573 tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI)
2576 /* check if the two clients are marked as isolated */
2577 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA &&
2578 tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA)
2585 * batadv_transtable_search() - get the mesh destination for a given client
2586 * @bat_priv: the bat priv with all the soft interface information
2587 * @src: mac address of the source client
2588 * @addr: mac address of the destination client
2589 * @vid: VLAN identifier
2591 * Return: a pointer to the originator that was selected as destination in the
2592 * mesh for contacting the client 'addr', NULL otherwise.
2593 * In case of multiple originators serving the same client, the function returns
2594 * the best one (best in terms of metric towards the destination node).
2596 * If the two clients are AP isolated the function returns NULL.
2598 struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv,
2603 struct batadv_tt_local_entry *tt_local_entry = NULL;
2604 struct batadv_tt_global_entry *tt_global_entry = NULL;
2605 struct batadv_orig_node *orig_node = NULL;
2606 struct batadv_tt_orig_list_entry *best_entry;
2608 if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) {
2609 tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid);
2610 if (!tt_local_entry ||
2611 (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING))
2615 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
2616 if (!tt_global_entry)
2619 /* check whether the clients should not communicate due to AP
2622 if (tt_local_entry &&
2623 _batadv_is_ap_isolated(tt_local_entry, tt_global_entry))
2627 best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
2628 /* found anything? */
2630 orig_node = best_entry->orig_node;
2631 if (orig_node && !kref_get_unless_zero(&orig_node->refcount))
2636 if (tt_global_entry)
2637 batadv_tt_global_entry_put(tt_global_entry);
2639 batadv_tt_local_entry_put(tt_local_entry);
2645 * batadv_tt_global_crc() - calculates the checksum of the local table belonging
2646 * to the given orig_node
2647 * @bat_priv: the bat priv with all the soft interface information
2648 * @orig_node: originator for which the CRC should be computed
2649 * @vid: VLAN identifier for which the CRC32 has to be computed
2651 * This function computes the checksum for the global table corresponding to a
2652 * specific originator. In particular, the checksum is computed as follows: For
2653 * each client connected to the originator the CRC32C of the MAC address and the
2654 * VID is computed and then all the CRC32Cs of the various clients are xor'ed
2657 * The idea behind is that CRC32C should be used as much as possible in order to
2658 * produce a unique hash of the table, but since the order which is used to feed
2659 * the CRC32C function affects the result and since every node in the network
2660 * probably sorts the clients differently, the hash function cannot be directly
2661 * computed over the entire table. Hence the CRC32C is used only on
2662 * the single client entry, while all the results are then xor'ed together
2663 * because the XOR operation can combine them all while trying to reduce the
2664 * noise as much as possible.
2666 * Return: the checksum of the global table of a given originator.
2668 static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv,
2669 struct batadv_orig_node *orig_node,
2672 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2673 struct batadv_tt_orig_list_entry *tt_orig;
2674 struct batadv_tt_common_entry *tt_common;
2675 struct batadv_tt_global_entry *tt_global;
2676 struct hlist_head *head;
2677 u32 i, crc_tmp, crc = 0;
2681 for (i = 0; i < hash->size; i++) {
2682 head = &hash->table[i];
2685 hlist_for_each_entry_rcu(tt_common, head, hash_entry) {
2686 tt_global = container_of(tt_common,
2687 struct batadv_tt_global_entry,
2689 /* compute the CRC only for entries belonging to the
2690 * VLAN identified by the vid passed as parameter
2692 if (tt_common->vid != vid)
2695 /* Roaming clients are in the global table for
2696 * consistency only. They don't have to be
2697 * taken into account while computing the
2700 if (tt_common->flags & BATADV_TT_CLIENT_ROAM)
2702 /* Temporary clients have not been announced yet, so
2703 * they have to be skipped while computing the global
2706 if (tt_common->flags & BATADV_TT_CLIENT_TEMP)
2709 /* find out if this global entry is announced by this
2712 tt_orig = batadv_tt_global_orig_entry_find(tt_global,
2717 /* use network order to read the VID: this ensures that
2718 * every node reads the bytes in the same order.
2720 tmp_vid = htons(tt_common->vid);
2721 crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid));
2723 /* compute the CRC on flags that have to be kept in sync
2726 flags = tt_orig->flags;
2727 crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
2729 crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
2731 batadv_tt_orig_list_entry_put(tt_orig);
2740 * batadv_tt_local_crc() - calculates the checksum of the local table
2741 * @bat_priv: the bat priv with all the soft interface information
2742 * @vid: VLAN identifier for which the CRC32 has to be computed
2744 * For details about the computation, please refer to the documentation for
2745 * batadv_tt_global_crc().
2747 * Return: the checksum of the local table
2749 static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv,
2752 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
2753 struct batadv_tt_common_entry *tt_common;
2754 struct hlist_head *head;
2755 u32 i, crc_tmp, crc = 0;
2759 for (i = 0; i < hash->size; i++) {
2760 head = &hash->table[i];
2763 hlist_for_each_entry_rcu(tt_common, head, hash_entry) {
2764 /* compute the CRC only for entries belonging to the
2765 * VLAN identified by vid
2767 if (tt_common->vid != vid)
2770 /* not yet committed clients have not to be taken into
2771 * account while computing the CRC
2773 if (tt_common->flags & BATADV_TT_CLIENT_NEW)
2776 /* use network order to read the VID: this ensures that
2777 * every node reads the bytes in the same order.
2779 tmp_vid = htons(tt_common->vid);
2780 crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid));
2782 /* compute the CRC on flags that have to be kept in sync
2785 flags = tt_common->flags & BATADV_TT_SYNC_MASK;
2786 crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
2788 crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
2797 * batadv_tt_req_node_release() - free tt_req node entry
2798 * @ref: kref pointer of the tt req_node entry
2800 static void batadv_tt_req_node_release(struct kref *ref)
2802 struct batadv_tt_req_node *tt_req_node;
2804 tt_req_node = container_of(ref, struct batadv_tt_req_node, refcount);
2806 kmem_cache_free(batadv_tt_req_cache, tt_req_node);
2810 * batadv_tt_req_node_put() - decrement the tt_req_node refcounter and
2811 * possibly release it
2812 * @tt_req_node: tt_req_node to be free'd
2814 static void batadv_tt_req_node_put(struct batadv_tt_req_node *tt_req_node)
2816 kref_put(&tt_req_node->refcount, batadv_tt_req_node_release);
2819 static void batadv_tt_req_list_free(struct batadv_priv *bat_priv)
2821 struct batadv_tt_req_node *node;
2822 struct hlist_node *safe;
2824 spin_lock_bh(&bat_priv->tt.req_list_lock);
2826 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
2827 hlist_del_init(&node->list);
2828 batadv_tt_req_node_put(node);
2831 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2834 static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv,
2835 struct batadv_orig_node *orig_node,
2836 const void *tt_buff,
2839 /* Replace the old buffer only if I received something in the
2840 * last OGM (the OGM could carry no changes)
2842 spin_lock_bh(&orig_node->tt_buff_lock);
2843 if (tt_buff_len > 0) {
2844 kfree(orig_node->tt_buff);
2845 orig_node->tt_buff_len = 0;
2846 orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC);
2847 if (orig_node->tt_buff) {
2848 memcpy(orig_node->tt_buff, tt_buff, tt_buff_len);
2849 orig_node->tt_buff_len = tt_buff_len;
2852 spin_unlock_bh(&orig_node->tt_buff_lock);
2855 static void batadv_tt_req_purge(struct batadv_priv *bat_priv)
2857 struct batadv_tt_req_node *node;
2858 struct hlist_node *safe;
2860 spin_lock_bh(&bat_priv->tt.req_list_lock);
2861 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
2862 if (batadv_has_timed_out(node->issued_at,
2863 BATADV_TT_REQUEST_TIMEOUT)) {
2864 hlist_del_init(&node->list);
2865 batadv_tt_req_node_put(node);
2868 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2872 * batadv_tt_req_node_new() - search and possibly create a tt_req_node object
2873 * @bat_priv: the bat priv with all the soft interface information
2874 * @orig_node: orig node this request is being issued for
2876 * Return: the pointer to the new tt_req_node struct if no request
2877 * has already been issued for this orig_node, NULL otherwise.
2879 static struct batadv_tt_req_node *
2880 batadv_tt_req_node_new(struct batadv_priv *bat_priv,
2881 struct batadv_orig_node *orig_node)
2883 struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL;
2885 spin_lock_bh(&bat_priv->tt.req_list_lock);
2886 hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) {
2887 if (batadv_compare_eth(tt_req_node_tmp, orig_node) &&
2888 !batadv_has_timed_out(tt_req_node_tmp->issued_at,
2889 BATADV_TT_REQUEST_TIMEOUT))
2893 tt_req_node = kmem_cache_alloc(batadv_tt_req_cache, GFP_ATOMIC);
2897 kref_init(&tt_req_node->refcount);
2898 ether_addr_copy(tt_req_node->addr, orig_node->orig);
2899 tt_req_node->issued_at = jiffies;
2901 kref_get(&tt_req_node->refcount);
2902 hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list);
2904 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2909 * batadv_tt_local_valid() - verify local tt entry and get flags
2910 * @entry_ptr: to be checked local tt entry
2911 * @data_ptr: not used but definition required to satisfy the callback prototype
2912 * @flags: a pointer to store TT flags for this client to
2914 * Checks the validity of the given local TT entry. If it is, then the provided
2915 * flags pointer is updated.
2917 * Return: true if the entry is a valid, false otherwise.
2919 static bool batadv_tt_local_valid(const void *entry_ptr,
2920 const void *data_ptr,
2923 const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
2925 if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW)
2929 *flags = tt_common_entry->flags;
2935 * batadv_tt_global_valid() - verify global tt entry and get flags
2936 * @entry_ptr: to be checked global tt entry
2937 * @data_ptr: an orig_node object (may be NULL)
2938 * @flags: a pointer to store TT flags for this client to
2940 * Checks the validity of the given global TT entry. If it is, then the provided
2941 * flags pointer is updated either with the common (summed) TT flags if data_ptr
2942 * is NULL or the specific, per originator TT flags otherwise.
2944 * Return: true if the entry is a valid, false otherwise.
2946 static bool batadv_tt_global_valid(const void *entry_ptr,
2947 const void *data_ptr,
2950 const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
2951 const struct batadv_tt_global_entry *tt_global_entry;
2952 const struct batadv_orig_node *orig_node = data_ptr;
2954 if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM ||
2955 tt_common_entry->flags & BATADV_TT_CLIENT_TEMP)
2958 tt_global_entry = container_of(tt_common_entry,
2959 struct batadv_tt_global_entry,
2962 return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node,
2967 * batadv_tt_tvlv_generate() - fill the tvlv buff with the tt entries from the
2969 * @bat_priv: the bat priv with all the soft interface information
2970 * @hash: hash table containing the tt entries
2971 * @tt_len: expected tvlv tt data buffer length in number of bytes
2972 * @tvlv_buff: pointer to the buffer to fill with the TT data
2973 * @valid_cb: function to filter tt change entries and to return TT flags
2974 * @cb_data: data passed to the filter function as argument
2976 * Fills the tvlv buff with the tt entries from the specified hash. If valid_cb
2977 * is not provided then this becomes a no-op.
2979 static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
2980 struct batadv_hashtable *hash,
2981 void *tvlv_buff, u16 tt_len,
2982 bool (*valid_cb)(const void *,
2987 struct batadv_tt_common_entry *tt_common_entry;
2988 struct batadv_tvlv_tt_change *tt_change;
2989 struct hlist_head *head;
2990 u16 tt_tot, tt_num_entries = 0;
2995 tt_tot = batadv_tt_entries(tt_len);
2996 tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff;
3002 for (i = 0; i < hash->size; i++) {
3003 head = &hash->table[i];
3005 hlist_for_each_entry_rcu(tt_common_entry,
3007 if (tt_tot == tt_num_entries)
3010 ret = valid_cb(tt_common_entry, cb_data, &flags);
3014 ether_addr_copy(tt_change->addr, tt_common_entry->addr);
3015 tt_change->flags = flags;
3016 tt_change->vid = htons(tt_common_entry->vid);
3017 memset(tt_change->reserved, 0,
3018 sizeof(tt_change->reserved));
3028 * batadv_tt_global_check_crc() - check if all the CRCs are correct
3029 * @orig_node: originator for which the CRCs have to be checked
3030 * @tt_vlan: pointer to the first tvlv VLAN entry
3031 * @num_vlan: number of tvlv VLAN entries
3033 * Return: true if all the received CRCs match the locally stored ones, false
3036 static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node,
3037 struct batadv_tvlv_tt_vlan_data *tt_vlan,
3040 struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp;
3041 struct batadv_orig_node_vlan *vlan;
3042 int i, orig_num_vlan;
3045 /* check if each received CRC matches the locally stored one */
3046 for (i = 0; i < num_vlan; i++) {
3047 tt_vlan_tmp = tt_vlan + i;
3049 /* if orig_node is a backbone node for this VLAN, don't check
3050 * the CRC as we ignore all the global entries over it
3052 if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv,
3054 ntohs(tt_vlan_tmp->vid)))
3057 vlan = batadv_orig_node_vlan_get(orig_node,
3058 ntohs(tt_vlan_tmp->vid));
3063 batadv_orig_node_vlan_put(vlan);
3065 if (crc != ntohl(tt_vlan_tmp->crc))
3069 /* check if any excess VLANs exist locally for the originator
3070 * which are not mentioned in the TVLV from the originator.
3074 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list)
3078 if (orig_num_vlan > num_vlan)
3085 * batadv_tt_local_update_crc() - update all the local CRCs
3086 * @bat_priv: the bat priv with all the soft interface information
3088 static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv)
3090 struct batadv_softif_vlan *vlan;
3092 /* recompute the global CRC for each VLAN */
3094 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
3095 vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid);
3101 * batadv_tt_global_update_crc() - update all the global CRCs for this orig_node
3102 * @bat_priv: the bat priv with all the soft interface information
3103 * @orig_node: the orig_node for which the CRCs have to be updated
3105 static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv,
3106 struct batadv_orig_node *orig_node)
3108 struct batadv_orig_node_vlan *vlan;
3111 /* recompute the global CRC for each VLAN */
3113 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
3114 /* if orig_node is a backbone node for this VLAN, don't compute
3115 * the CRC as we ignore all the global entries over it
3117 if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig,
3121 crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid);
3128 * batadv_send_tt_request() - send a TT Request message to a given node
3129 * @bat_priv: the bat priv with all the soft interface information
3130 * @dst_orig_node: the destination of the message
3131 * @ttvn: the version number that the source of the message is looking for
3132 * @tt_vlan: pointer to the first tvlv VLAN object to request
3133 * @num_vlan: number of tvlv VLAN entries
3134 * @full_table: ask for the entire translation table if true, while only for the
3135 * last TT diff otherwise
3137 * Return: true if the TT Request was sent, false otherwise
3139 static bool batadv_send_tt_request(struct batadv_priv *bat_priv,
3140 struct batadv_orig_node *dst_orig_node,
3142 struct batadv_tvlv_tt_vlan_data *tt_vlan,
3143 u16 num_vlan, bool full_table)
3145 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3146 struct batadv_tt_req_node *tt_req_node = NULL;
3147 struct batadv_tvlv_tt_vlan_data *tt_vlan_req;
3148 struct batadv_hard_iface *primary_if;
3152 primary_if = batadv_primary_if_get_selected(bat_priv);
3156 /* The new tt_req will be issued only if I'm not waiting for a
3157 * reply from the same orig_node yet
3159 tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node);
3163 size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan;
3164 tvlv_tt_data = kzalloc(size, GFP_ATOMIC);
3168 tvlv_tt_data->flags = BATADV_TT_REQUEST;
3169 tvlv_tt_data->ttvn = ttvn;
3170 tvlv_tt_data->num_vlan = htons(num_vlan);
3172 /* send all the CRCs within the request. This is needed by intermediate
3173 * nodes to ensure they have the correct table before replying
3175 tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1);
3176 for (i = 0; i < num_vlan; i++) {
3177 tt_vlan_req->vid = tt_vlan->vid;
3178 tt_vlan_req->crc = tt_vlan->crc;
3185 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3187 batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n",
3188 dst_orig_node->orig, full_table ? 'F' : '.');
3190 batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX);
3191 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3192 dst_orig_node->orig, BATADV_TVLV_TT, 1,
3193 tvlv_tt_data, size);
3198 batadv_hardif_put(primary_if);
3200 if (ret && tt_req_node) {
3201 spin_lock_bh(&bat_priv->tt.req_list_lock);
3202 if (!hlist_unhashed(&tt_req_node->list)) {
3203 hlist_del_init(&tt_req_node->list);
3204 batadv_tt_req_node_put(tt_req_node);
3206 spin_unlock_bh(&bat_priv->tt.req_list_lock);
3210 batadv_tt_req_node_put(tt_req_node);
3212 kfree(tvlv_tt_data);
3217 * batadv_send_other_tt_response() - send reply to tt request concerning another
3218 * node's translation table
3219 * @bat_priv: the bat priv with all the soft interface information
3220 * @tt_data: tt data containing the tt request information
3221 * @req_src: mac address of tt request sender
3222 * @req_dst: mac address of tt request recipient
3224 * Return: true if tt request reply was sent, false otherwise.
3226 static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv,
3227 struct batadv_tvlv_tt_data *tt_data,
3228 u8 *req_src, u8 *req_dst)
3230 struct batadv_orig_node *req_dst_orig_node;
3231 struct batadv_orig_node *res_dst_orig_node = NULL;
3232 struct batadv_tvlv_tt_change *tt_change;
3233 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3234 struct batadv_tvlv_tt_vlan_data *tt_vlan;
3235 bool ret = false, full_table;
3236 u8 orig_ttvn, req_ttvn;
3240 batadv_dbg(BATADV_DBG_TT, bat_priv,
3241 "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n",
3242 req_src, tt_data->ttvn, req_dst,
3243 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3245 /* Let's get the orig node of the REAL destination */
3246 req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst);
3247 if (!req_dst_orig_node)
3250 res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src);
3251 if (!res_dst_orig_node)
3254 orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn);
3255 req_ttvn = tt_data->ttvn;
3257 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
3258 /* this node doesn't have the requested data */
3259 if (orig_ttvn != req_ttvn ||
3260 !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan,
3261 ntohs(tt_data->num_vlan)))
3264 /* If the full table has been explicitly requested */
3265 if (tt_data->flags & BATADV_TT_FULL_TABLE ||
3266 !req_dst_orig_node->tt_buff)
3271 /* TT fragmentation hasn't been implemented yet, so send as many
3272 * TT entries fit a single packet as possible only
3275 spin_lock_bh(&req_dst_orig_node->tt_buff_lock);
3276 tt_len = req_dst_orig_node->tt_buff_len;
3278 tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
3285 /* Copy the last orig_node's OGM buffer */
3286 memcpy(tt_change, req_dst_orig_node->tt_buff,
3287 req_dst_orig_node->tt_buff_len);
3288 spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
3290 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3291 * in the initial part
3294 tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
3301 /* fill the rest of the tvlv with the real TT entries */
3302 batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash,
3304 batadv_tt_global_valid,
3308 /* Don't send the response, if larger than fragmented packet. */
3309 tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len;
3310 if (tt_len > atomic_read(&bat_priv->packet_size_max)) {
3311 net_ratelimited_function(batadv_info, bat_priv->soft_iface,
3312 "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n",
3313 res_dst_orig_node->orig);
3317 tvlv_tt_data->flags = BATADV_TT_RESPONSE;
3318 tvlv_tt_data->ttvn = req_ttvn;
3321 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3323 batadv_dbg(BATADV_DBG_TT, bat_priv,
3324 "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n",
3325 res_dst_orig_node->orig, req_dst_orig_node->orig,
3326 full_table ? 'F' : '.', req_ttvn);
3328 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
3330 batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig,
3331 req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
3338 spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
3341 if (res_dst_orig_node)
3342 batadv_orig_node_put(res_dst_orig_node);
3343 if (req_dst_orig_node)
3344 batadv_orig_node_put(req_dst_orig_node);
3345 kfree(tvlv_tt_data);
3350 * batadv_send_my_tt_response() - send reply to tt request concerning this
3351 * node's translation table
3352 * @bat_priv: the bat priv with all the soft interface information
3353 * @tt_data: tt data containing the tt request information
3354 * @req_src: mac address of tt request sender
3356 * Return: true if tt request reply was sent, false otherwise.
3358 static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv,
3359 struct batadv_tvlv_tt_data *tt_data,
3362 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3363 struct batadv_hard_iface *primary_if = NULL;
3364 struct batadv_tvlv_tt_change *tt_change;
3365 struct batadv_orig_node *orig_node;
3366 u8 my_ttvn, req_ttvn;
3371 batadv_dbg(BATADV_DBG_TT, bat_priv,
3372 "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
3373 req_src, tt_data->ttvn,
3374 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3376 spin_lock_bh(&bat_priv->tt.commit_lock);
3378 my_ttvn = (u8)atomic_read(&bat_priv->tt.vn);
3379 req_ttvn = tt_data->ttvn;
3381 orig_node = batadv_orig_hash_find(bat_priv, req_src);
3385 primary_if = batadv_primary_if_get_selected(bat_priv);
3389 /* If the full table has been explicitly requested or the gap
3390 * is too big send the whole local translation table
3392 if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn ||
3393 !bat_priv->tt.last_changeset)
3398 /* TT fragmentation hasn't been implemented yet, so send as many
3399 * TT entries fit a single packet as possible only
3402 spin_lock_bh(&bat_priv->tt.last_changeset_lock);
3404 tt_len = bat_priv->tt.last_changeset_len;
3405 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
3409 if (!tt_len || !tvlv_len)
3412 /* Copy the last orig_node's OGM buffer */
3413 memcpy(tt_change, bat_priv->tt.last_changeset,
3414 bat_priv->tt.last_changeset_len);
3415 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
3417 req_ttvn = (u8)atomic_read(&bat_priv->tt.vn);
3419 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3420 * in the initial part
3423 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
3427 if (!tt_len || !tvlv_len)
3430 /* fill the rest of the tvlv with the real TT entries */
3431 batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash,
3433 batadv_tt_local_valid, NULL);
3436 tvlv_tt_data->flags = BATADV_TT_RESPONSE;
3437 tvlv_tt_data->ttvn = req_ttvn;
3440 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3442 batadv_dbg(BATADV_DBG_TT, bat_priv,
3443 "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n",
3444 orig_node->orig, full_table ? 'F' : '.', req_ttvn);
3446 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
3448 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3449 req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
3455 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
3457 spin_unlock_bh(&bat_priv->tt.commit_lock);
3459 batadv_orig_node_put(orig_node);
3461 batadv_hardif_put(primary_if);
3462 kfree(tvlv_tt_data);
3463 /* The packet was for this host, so it doesn't need to be re-routed */
3468 * batadv_send_tt_response() - send reply to tt request
3469 * @bat_priv: the bat priv with all the soft interface information
3470 * @tt_data: tt data containing the tt request information
3471 * @req_src: mac address of tt request sender
3472 * @req_dst: mac address of tt request recipient
3474 * Return: true if tt request reply was sent, false otherwise.
3476 static bool batadv_send_tt_response(struct batadv_priv *bat_priv,
3477 struct batadv_tvlv_tt_data *tt_data,
3478 u8 *req_src, u8 *req_dst)
3480 if (batadv_is_my_mac(bat_priv, req_dst))
3481 return batadv_send_my_tt_response(bat_priv, tt_data, req_src);
3482 return batadv_send_other_tt_response(bat_priv, tt_data, req_src,
3486 static void _batadv_tt_update_changes(struct batadv_priv *bat_priv,
3487 struct batadv_orig_node *orig_node,
3488 struct batadv_tvlv_tt_change *tt_change,
3489 u16 tt_num_changes, u8 ttvn)
3494 for (i = 0; i < tt_num_changes; i++) {
3495 if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) {
3496 roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM;
3497 batadv_tt_global_del(bat_priv, orig_node,
3498 (tt_change + i)->addr,
3499 ntohs((tt_change + i)->vid),
3500 "tt removed by changes",
3503 if (!batadv_tt_global_add(bat_priv, orig_node,
3504 (tt_change + i)->addr,
3505 ntohs((tt_change + i)->vid),
3506 (tt_change + i)->flags, ttvn))
3507 /* In case of problem while storing a
3508 * global_entry, we stop the updating
3509 * procedure without committing the
3510 * ttvn change. This will avoid to send
3511 * corrupted data on tt_request
3516 set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized);
3519 static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv,
3520 struct batadv_tvlv_tt_change *tt_change,
3521 u8 ttvn, u8 *resp_src,
3524 struct batadv_orig_node *orig_node;
3526 orig_node = batadv_orig_hash_find(bat_priv, resp_src);
3530 /* Purge the old table first.. */
3531 batadv_tt_global_del_orig(bat_priv, orig_node, -1,
3532 "Received full table");
3534 _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries,
3537 spin_lock_bh(&orig_node->tt_buff_lock);
3538 kfree(orig_node->tt_buff);
3539 orig_node->tt_buff_len = 0;
3540 orig_node->tt_buff = NULL;
3541 spin_unlock_bh(&orig_node->tt_buff_lock);
3543 atomic_set(&orig_node->last_ttvn, ttvn);
3547 batadv_orig_node_put(orig_node);
3550 static void batadv_tt_update_changes(struct batadv_priv *bat_priv,
3551 struct batadv_orig_node *orig_node,
3552 u16 tt_num_changes, u8 ttvn,
3553 struct batadv_tvlv_tt_change *tt_change)
3555 _batadv_tt_update_changes(bat_priv, orig_node, tt_change,
3556 tt_num_changes, ttvn);
3558 batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change,
3559 batadv_tt_len(tt_num_changes));
3560 atomic_set(&orig_node->last_ttvn, ttvn);
3564 * batadv_is_my_client() - check if a client is served by the local node
3565 * @bat_priv: the bat priv with all the soft interface information
3566 * @addr: the mac address of the client to check
3567 * @vid: VLAN identifier
3569 * Return: true if the client is served by this node, false otherwise.
3571 bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr,
3574 struct batadv_tt_local_entry *tt_local_entry;
3577 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
3578 if (!tt_local_entry)
3580 /* Check if the client has been logically deleted (but is kept for
3581 * consistency purpose)
3583 if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) ||
3584 (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM))
3589 batadv_tt_local_entry_put(tt_local_entry);
3594 * batadv_handle_tt_response() - process incoming tt reply
3595 * @bat_priv: the bat priv with all the soft interface information
3596 * @tt_data: tt data containing the tt request information
3597 * @resp_src: mac address of tt reply sender
3598 * @num_entries: number of tt change entries appended to the tt data
3600 static void batadv_handle_tt_response(struct batadv_priv *bat_priv,
3601 struct batadv_tvlv_tt_data *tt_data,
3602 u8 *resp_src, u16 num_entries)
3604 struct batadv_tt_req_node *node;
3605 struct hlist_node *safe;
3606 struct batadv_orig_node *orig_node = NULL;
3607 struct batadv_tvlv_tt_change *tt_change;
3608 u8 *tvlv_ptr = (u8 *)tt_data;
3611 batadv_dbg(BATADV_DBG_TT, bat_priv,
3612 "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
3613 resp_src, tt_data->ttvn, num_entries,
3614 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3616 orig_node = batadv_orig_hash_find(bat_priv, resp_src);
3620 spin_lock_bh(&orig_node->tt_lock);
3622 change_offset = sizeof(struct batadv_tvlv_tt_vlan_data);
3623 change_offset *= ntohs(tt_data->num_vlan);
3624 change_offset += sizeof(*tt_data);
3625 tvlv_ptr += change_offset;
3627 tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr;
3628 if (tt_data->flags & BATADV_TT_FULL_TABLE) {
3629 batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn,
3630 resp_src, num_entries);
3632 batadv_tt_update_changes(bat_priv, orig_node, num_entries,
3633 tt_data->ttvn, tt_change);
3636 /* Recalculate the CRC for this orig_node and store it */
3637 batadv_tt_global_update_crc(bat_priv, orig_node);
3639 spin_unlock_bh(&orig_node->tt_lock);
3641 /* Delete the tt_req_node from pending tt_requests list */
3642 spin_lock_bh(&bat_priv->tt.req_list_lock);
3643 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
3644 if (!batadv_compare_eth(node->addr, resp_src))
3646 hlist_del_init(&node->list);
3647 batadv_tt_req_node_put(node);
3650 spin_unlock_bh(&bat_priv->tt.req_list_lock);
3653 batadv_orig_node_put(orig_node);
3656 static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv)
3658 struct batadv_tt_roam_node *node, *safe;
3660 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3662 list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) {
3663 list_del(&node->list);
3664 kmem_cache_free(batadv_tt_roam_cache, node);
3667 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3670 static void batadv_tt_roam_purge(struct batadv_priv *bat_priv)
3672 struct batadv_tt_roam_node *node, *safe;
3674 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3675 list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) {
3676 if (!batadv_has_timed_out(node->first_time,
3677 BATADV_ROAMING_MAX_TIME))
3680 list_del(&node->list);
3681 kmem_cache_free(batadv_tt_roam_cache, node);
3683 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3687 * batadv_tt_check_roam_count() - check if a client has roamed too frequently
3688 * @bat_priv: the bat priv with all the soft interface information
3689 * @client: mac address of the roaming client
3691 * This function checks whether the client already reached the
3692 * maximum number of possible roaming phases. In this case the ROAMING_ADV
3695 * Return: true if the ROAMING_ADV can be sent, false otherwise
3697 static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client)
3699 struct batadv_tt_roam_node *tt_roam_node;
3702 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3703 /* The new tt_req will be issued only if I'm not waiting for a
3704 * reply from the same orig_node yet
3706 list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) {
3707 if (!batadv_compare_eth(tt_roam_node->addr, client))
3710 if (batadv_has_timed_out(tt_roam_node->first_time,
3711 BATADV_ROAMING_MAX_TIME))
3714 if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter))
3715 /* Sorry, you roamed too many times! */
3722 tt_roam_node = kmem_cache_alloc(batadv_tt_roam_cache,
3727 tt_roam_node->first_time = jiffies;
3728 atomic_set(&tt_roam_node->counter,
3729 BATADV_ROAMING_MAX_COUNT - 1);
3730 ether_addr_copy(tt_roam_node->addr, client);
3732 list_add(&tt_roam_node->list, &bat_priv->tt.roam_list);
3737 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3742 * batadv_send_roam_adv() - send a roaming advertisement message
3743 * @bat_priv: the bat priv with all the soft interface information
3744 * @client: mac address of the roaming client
3745 * @vid: VLAN identifier
3746 * @orig_node: message destination
3748 * Send a ROAMING_ADV message to the node which was previously serving this
3749 * client. This is done to inform the node that from now on all traffic destined
3750 * for this particular roamed client has to be forwarded to the sender of the
3753 static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client,
3755 struct batadv_orig_node *orig_node)
3757 struct batadv_hard_iface *primary_if;
3758 struct batadv_tvlv_roam_adv tvlv_roam;
3760 primary_if = batadv_primary_if_get_selected(bat_priv);
3764 /* before going on we have to check whether the client has
3765 * already roamed to us too many times
3767 if (!batadv_tt_check_roam_count(bat_priv, client))
3770 batadv_dbg(BATADV_DBG_TT, bat_priv,
3771 "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n",
3772 orig_node->orig, client, batadv_print_vid(vid));
3774 batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX);
3776 memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client));
3777 tvlv_roam.vid = htons(vid);
3779 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3780 orig_node->orig, BATADV_TVLV_ROAM, 1,
3781 &tvlv_roam, sizeof(tvlv_roam));
3785 batadv_hardif_put(primary_if);
3788 static void batadv_tt_purge(struct work_struct *work)
3790 struct delayed_work *delayed_work;
3791 struct batadv_priv_tt *priv_tt;
3792 struct batadv_priv *bat_priv;
3794 delayed_work = to_delayed_work(work);
3795 priv_tt = container_of(delayed_work, struct batadv_priv_tt, work);
3796 bat_priv = container_of(priv_tt, struct batadv_priv, tt);
3798 batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT);
3799 batadv_tt_global_purge(bat_priv);
3800 batadv_tt_req_purge(bat_priv);
3801 batadv_tt_roam_purge(bat_priv);
3803 queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
3804 msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
3808 * batadv_tt_free() - Free translation table of soft interface
3809 * @bat_priv: the bat priv with all the soft interface information
3811 void batadv_tt_free(struct batadv_priv *bat_priv)
3813 batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1);
3814 batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1);
3816 cancel_delayed_work_sync(&bat_priv->tt.work);
3818 batadv_tt_local_table_free(bat_priv);
3819 batadv_tt_global_table_free(bat_priv);
3820 batadv_tt_req_list_free(bat_priv);
3821 batadv_tt_changes_list_free(bat_priv);
3822 batadv_tt_roam_list_free(bat_priv);
3824 kfree(bat_priv->tt.last_changeset);
3828 * batadv_tt_local_set_flags() - set or unset the specified flags on the local
3829 * table and possibly count them in the TT size
3830 * @bat_priv: the bat priv with all the soft interface information
3831 * @flags: the flag to switch
3832 * @enable: whether to set or unset the flag
3833 * @count: whether to increase the TT size by the number of changed entries
3835 static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags,
3836 bool enable, bool count)
3838 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
3839 struct batadv_tt_common_entry *tt_common_entry;
3840 struct hlist_head *head;
3846 for (i = 0; i < hash->size; i++) {
3847 head = &hash->table[i];
3850 hlist_for_each_entry_rcu(tt_common_entry,
3853 if ((tt_common_entry->flags & flags) == flags)
3855 tt_common_entry->flags |= flags;
3857 if (!(tt_common_entry->flags & flags))
3859 tt_common_entry->flags &= ~flags;
3865 batadv_tt_local_size_inc(bat_priv,
3866 tt_common_entry->vid);
3872 /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */
3873 static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv)
3875 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
3876 struct batadv_tt_common_entry *tt_common;
3877 struct batadv_tt_local_entry *tt_local;
3878 struct hlist_node *node_tmp;
3879 struct hlist_head *head;
3880 spinlock_t *list_lock; /* protects write access to the hash lists */
3886 for (i = 0; i < hash->size; i++) {
3887 head = &hash->table[i];
3888 list_lock = &hash->list_locks[i];
3890 spin_lock_bh(list_lock);
3891 hlist_for_each_entry_safe(tt_common, node_tmp, head,
3893 if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING))
3896 batadv_dbg(BATADV_DBG_TT, bat_priv,
3897 "Deleting local tt entry (%pM, vid: %d): pending\n",
3899 batadv_print_vid(tt_common->vid));
3901 batadv_tt_local_size_dec(bat_priv, tt_common->vid);
3902 hlist_del_rcu(&tt_common->hash_entry);
3903 tt_local = container_of(tt_common,
3904 struct batadv_tt_local_entry,
3907 batadv_tt_local_entry_put(tt_local);
3909 spin_unlock_bh(list_lock);
3914 * batadv_tt_local_commit_changes_nolock() - commit all pending local tt changes
3915 * which have been queued in the time since the last commit
3916 * @bat_priv: the bat priv with all the soft interface information
3918 * Caller must hold tt->commit_lock.
3920 static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv)
3922 lockdep_assert_held(&bat_priv->tt.commit_lock);
3924 if (atomic_read(&bat_priv->tt.local_changes) < 1) {
3925 if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt))
3926 batadv_tt_tvlv_container_update(bat_priv);
3930 batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true);
3932 batadv_tt_local_purge_pending_clients(bat_priv);
3933 batadv_tt_local_update_crc(bat_priv);
3935 /* Increment the TTVN only once per OGM interval */
3936 atomic_inc(&bat_priv->tt.vn);
3937 batadv_dbg(BATADV_DBG_TT, bat_priv,
3938 "Local changes committed, updating to ttvn %u\n",
3939 (u8)atomic_read(&bat_priv->tt.vn));
3941 /* reset the sending counter */
3942 atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX);
3943 batadv_tt_tvlv_container_update(bat_priv);
3947 * batadv_tt_local_commit_changes() - commit all pending local tt changes which
3948 * have been queued in the time since the last commit
3949 * @bat_priv: the bat priv with all the soft interface information
3951 void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv)
3953 spin_lock_bh(&bat_priv->tt.commit_lock);
3954 batadv_tt_local_commit_changes_nolock(bat_priv);
3955 spin_unlock_bh(&bat_priv->tt.commit_lock);
3959 * batadv_is_ap_isolated() - Check if packet from upper layer should be dropped
3960 * @bat_priv: the bat priv with all the soft interface information
3961 * @src: source mac address of packet
3962 * @dst: destination mac address of packet
3963 * @vid: vlan id of packet
3965 * Return: true when src+dst(+vid) pair should be isolated, false otherwise
3967 bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst,
3970 struct batadv_tt_local_entry *tt_local_entry;
3971 struct batadv_tt_global_entry *tt_global_entry;
3972 struct batadv_softif_vlan *vlan;
3975 vlan = batadv_softif_vlan_get(bat_priv, vid);
3979 if (!atomic_read(&vlan->ap_isolation))
3982 tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid);
3983 if (!tt_local_entry)
3986 tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid);
3987 if (!tt_global_entry)
3988 goto local_entry_put;
3990 if (_batadv_is_ap_isolated(tt_local_entry, tt_global_entry))
3993 batadv_tt_global_entry_put(tt_global_entry);
3995 batadv_tt_local_entry_put(tt_local_entry);
3997 batadv_softif_vlan_put(vlan);
4002 * batadv_tt_update_orig() - update global translation table with new tt
4003 * information received via ogms
4004 * @bat_priv: the bat priv with all the soft interface information
4005 * @orig_node: the orig_node of the ogm
4006 * @tt_buff: pointer to the first tvlv VLAN entry
4007 * @tt_num_vlan: number of tvlv VLAN entries
4008 * @tt_change: pointer to the first entry in the TT buffer
4009 * @tt_num_changes: number of tt changes inside the tt buffer
4010 * @ttvn: translation table version number of this changeset
4012 static void batadv_tt_update_orig(struct batadv_priv *bat_priv,
4013 struct batadv_orig_node *orig_node,
4014 const void *tt_buff, u16 tt_num_vlan,
4015 struct batadv_tvlv_tt_change *tt_change,
4016 u16 tt_num_changes, u8 ttvn)
4018 u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn);
4019 struct batadv_tvlv_tt_vlan_data *tt_vlan;
4020 bool full_table = true;
4023 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff;
4024 has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT,
4025 &orig_node->capa_initialized);
4027 /* orig table not initialised AND first diff is in the OGM OR the ttvn
4028 * increased by one -> we can apply the attached changes
4030 if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) {
4031 /* the OGM could not contain the changes due to their size or
4032 * because they have already been sent BATADV_TT_OGM_APPEND_MAX
4034 * In this case send a tt request
4036 if (!tt_num_changes) {
4041 spin_lock_bh(&orig_node->tt_lock);
4043 batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes,
4046 /* Even if we received the precomputed crc with the OGM, we
4047 * prefer to recompute it to spot any possible inconsistency
4048 * in the global table
4050 batadv_tt_global_update_crc(bat_priv, orig_node);
4052 spin_unlock_bh(&orig_node->tt_lock);
4054 /* The ttvn alone is not enough to guarantee consistency
4055 * because a single value could represent different states
4056 * (due to the wrap around). Thus a node has to check whether
4057 * the resulting table (after applying the changes) is still
4058 * consistent or not. E.g. a node could disconnect while its
4059 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
4060 * checking the CRC value is mandatory to detect the
4063 if (!batadv_tt_global_check_crc(orig_node, tt_vlan,
4067 /* if we missed more than one change or our tables are not
4068 * in sync anymore -> request fresh tt data
4070 if (!has_tt_init || ttvn != orig_ttvn ||
4071 !batadv_tt_global_check_crc(orig_node, tt_vlan,
4074 batadv_dbg(BATADV_DBG_TT, bat_priv,
4075 "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n",
4076 orig_node->orig, ttvn, orig_ttvn,
4078 batadv_send_tt_request(bat_priv, orig_node, ttvn,
4079 tt_vlan, tt_num_vlan,
4087 * batadv_tt_global_client_is_roaming() - check if a client is marked as roaming
4088 * @bat_priv: the bat priv with all the soft interface information
4089 * @addr: the mac address of the client to check
4090 * @vid: VLAN identifier
4092 * Return: true if we know that the client has moved from its old originator
4093 * to another one. This entry is still kept for consistency purposes and will be
4094 * deleted later by a DEL or because of timeout
4096 bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv,
4097 u8 *addr, unsigned short vid)
4099 struct batadv_tt_global_entry *tt_global_entry;
4102 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
4103 if (!tt_global_entry)
4106 ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM;
4107 batadv_tt_global_entry_put(tt_global_entry);
4113 * batadv_tt_local_client_is_roaming() - tells whether the client is roaming
4114 * @bat_priv: the bat priv with all the soft interface information
4115 * @addr: the mac address of the local client to query
4116 * @vid: VLAN identifier
4118 * Return: true if the local client is known to be roaming (it is not served by
4119 * this node anymore) or not. If yes, the client is still present in the table
4120 * to keep the latter consistent with the node TTVN
4122 bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv,
4123 u8 *addr, unsigned short vid)
4125 struct batadv_tt_local_entry *tt_local_entry;
4128 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
4129 if (!tt_local_entry)
4132 ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM;
4133 batadv_tt_local_entry_put(tt_local_entry);
4139 * batadv_tt_add_temporary_global_entry() - Add temporary entry to global TT
4140 * @bat_priv: the bat priv with all the soft interface information
4141 * @orig_node: orig node which the temporary entry should be associated with
4142 * @addr: mac address of the client
4143 * @vid: VLAN id of the new temporary global translation table
4145 * Return: true when temporary tt entry could be added, false otherwise
4147 bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv,
4148 struct batadv_orig_node *orig_node,
4149 const unsigned char *addr,
4152 /* ignore loop detect macs, they are not supposed to be in the tt local
4155 if (batadv_bla_is_loopdetect_mac(addr))
4158 if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid,
4159 BATADV_TT_CLIENT_TEMP,
4160 atomic_read(&orig_node->last_ttvn)))
4163 batadv_dbg(BATADV_DBG_TT, bat_priv,
4164 "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n",
4165 addr, batadv_print_vid(vid), orig_node->orig);
4171 * batadv_tt_local_resize_to_mtu() - resize the local translation table fit the
4172 * maximum packet size that can be transported through the mesh
4173 * @soft_iface: netdev struct of the mesh interface
4175 * Remove entries older than 'timeout' and half timeout if more entries need
4178 void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface)
4180 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
4181 int packet_size_max = atomic_read(&bat_priv->packet_size_max);
4182 int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2;
4183 bool reduced = false;
4185 spin_lock_bh(&bat_priv->tt.commit_lock);
4188 table_size = batadv_tt_local_table_transmit_size(bat_priv);
4189 if (packet_size_max >= table_size)
4192 batadv_tt_local_purge(bat_priv, timeout);
4193 batadv_tt_local_purge_pending_clients(bat_priv);
4197 net_ratelimited_function(batadv_info, soft_iface,
4198 "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n",
4202 /* commit these changes immediately, to avoid synchronization problem
4206 batadv_tt_local_commit_changes_nolock(bat_priv);
4208 spin_unlock_bh(&bat_priv->tt.commit_lock);
4212 * batadv_tt_tvlv_ogm_handler_v1() - process incoming tt tvlv container
4213 * @bat_priv: the bat priv with all the soft interface information
4214 * @orig: the orig_node of the ogm
4215 * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
4216 * @tvlv_value: tvlv buffer containing the gateway data
4217 * @tvlv_value_len: tvlv buffer length
4219 static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,
4220 struct batadv_orig_node *orig,
4221 u8 flags, void *tvlv_value,
4224 struct batadv_tvlv_tt_vlan_data *tt_vlan;
4225 struct batadv_tvlv_tt_change *tt_change;
4226 struct batadv_tvlv_tt_data *tt_data;
4227 u16 num_entries, num_vlan;
4229 if (tvlv_value_len < sizeof(*tt_data))
4232 tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
4233 tvlv_value_len -= sizeof(*tt_data);
4235 num_vlan = ntohs(tt_data->num_vlan);
4237 if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan)
4240 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
4241 tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan);
4242 tvlv_value_len -= sizeof(*tt_vlan) * num_vlan;
4244 num_entries = batadv_tt_entries(tvlv_value_len);
4246 batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change,
4247 num_entries, tt_data->ttvn);
4251 * batadv_tt_tvlv_unicast_handler_v1() - process incoming (unicast) tt tvlv
4253 * @bat_priv: the bat priv with all the soft interface information
4254 * @src: mac address of tt tvlv sender
4255 * @dst: mac address of tt tvlv recipient
4256 * @tvlv_value: tvlv buffer containing the tt data
4257 * @tvlv_value_len: tvlv buffer length
4259 * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS
4262 static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
4267 struct batadv_tvlv_tt_data *tt_data;
4268 u16 tt_vlan_len, tt_num_entries;
4272 if (tvlv_value_len < sizeof(*tt_data))
4273 return NET_RX_SUCCESS;
4275 tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
4276 tvlv_value_len -= sizeof(*tt_data);
4278 tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data);
4279 tt_vlan_len *= ntohs(tt_data->num_vlan);
4281 if (tvlv_value_len < tt_vlan_len)
4282 return NET_RX_SUCCESS;
4284 tvlv_value_len -= tt_vlan_len;
4285 tt_num_entries = batadv_tt_entries(tvlv_value_len);
4287 switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) {
4288 case BATADV_TT_REQUEST:
4289 batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX);
4291 /* If this node cannot provide a TT response the tt_request is
4294 ret = batadv_send_tt_response(bat_priv, tt_data, src, dst);
4296 if (tt_data->flags & BATADV_TT_FULL_TABLE)
4301 batadv_dbg(BATADV_DBG_TT, bat_priv,
4302 "Routing TT_REQUEST to %pM [%c]\n",
4304 /* tvlv API will re-route the packet */
4308 case BATADV_TT_RESPONSE:
4309 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX);
4311 if (batadv_is_my_mac(bat_priv, dst)) {
4312 batadv_handle_tt_response(bat_priv, tt_data,
4313 src, tt_num_entries);
4314 return NET_RX_SUCCESS;
4317 if (tt_data->flags & BATADV_TT_FULL_TABLE)
4322 batadv_dbg(BATADV_DBG_TT, bat_priv,
4323 "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag);
4325 /* tvlv API will re-route the packet */
4329 return NET_RX_SUCCESS;
4333 * batadv_roam_tvlv_unicast_handler_v1() - process incoming tt roam tvlv
4335 * @bat_priv: the bat priv with all the soft interface information
4336 * @src: mac address of tt tvlv sender
4337 * @dst: mac address of tt tvlv recipient
4338 * @tvlv_value: tvlv buffer containing the tt data
4339 * @tvlv_value_len: tvlv buffer length
4341 * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS
4344 static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
4349 struct batadv_tvlv_roam_adv *roaming_adv;
4350 struct batadv_orig_node *orig_node = NULL;
4352 /* If this node is not the intended recipient of the
4353 * roaming advertisement the packet is forwarded
4354 * (the tvlv API will re-route the packet).
4356 if (!batadv_is_my_mac(bat_priv, dst))
4359 if (tvlv_value_len < sizeof(*roaming_adv))
4362 orig_node = batadv_orig_hash_find(bat_priv, src);
4366 batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX);
4367 roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value;
4369 batadv_dbg(BATADV_DBG_TT, bat_priv,
4370 "Received ROAMING_ADV from %pM (client %pM)\n",
4371 src, roaming_adv->client);
4373 batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client,
4374 ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM,
4375 atomic_read(&orig_node->last_ttvn) + 1);
4379 batadv_orig_node_put(orig_node);
4380 return NET_RX_SUCCESS;
4384 * batadv_tt_init() - initialise the translation table internals
4385 * @bat_priv: the bat priv with all the soft interface information
4387 * Return: 0 on success or negative error number in case of failure.
4389 int batadv_tt_init(struct batadv_priv *bat_priv)
4393 /* synchronized flags must be remote */
4394 BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK));
4396 ret = batadv_tt_local_init(bat_priv);
4400 ret = batadv_tt_global_init(bat_priv);
4404 batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1,
4405 batadv_tt_tvlv_unicast_handler_v1,
4406 BATADV_TVLV_TT, 1, BATADV_NO_FLAGS);
4408 batadv_tvlv_handler_register(bat_priv, NULL,
4409 batadv_roam_tvlv_unicast_handler_v1,
4410 BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS);
4412 INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge);
4413 queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
4414 msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
4420 * batadv_tt_global_is_isolated() - check if a client is marked as isolated
4421 * @bat_priv: the bat priv with all the soft interface information
4422 * @addr: the mac address of the client
4423 * @vid: the identifier of the VLAN where this client is connected
4425 * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false
4428 bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv,
4429 const u8 *addr, unsigned short vid)
4431 struct batadv_tt_global_entry *tt;
4434 tt = batadv_tt_global_hash_find(bat_priv, addr, vid);
4438 ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA;
4440 batadv_tt_global_entry_put(tt);
4446 * batadv_tt_cache_init() - Initialize tt memory object cache
4448 * Return: 0 on success or negative error number in case of failure.
4450 int __init batadv_tt_cache_init(void)
4452 size_t tl_size = sizeof(struct batadv_tt_local_entry);
4453 size_t tg_size = sizeof(struct batadv_tt_global_entry);
4454 size_t tt_orig_size = sizeof(struct batadv_tt_orig_list_entry);
4455 size_t tt_change_size = sizeof(struct batadv_tt_change_node);
4456 size_t tt_req_size = sizeof(struct batadv_tt_req_node);
4457 size_t tt_roam_size = sizeof(struct batadv_tt_roam_node);
4459 batadv_tl_cache = kmem_cache_create("batadv_tl_cache", tl_size, 0,
4460 SLAB_HWCACHE_ALIGN, NULL);
4461 if (!batadv_tl_cache)
4464 batadv_tg_cache = kmem_cache_create("batadv_tg_cache", tg_size, 0,
4465 SLAB_HWCACHE_ALIGN, NULL);
4466 if (!batadv_tg_cache)
4467 goto err_tt_tl_destroy;
4469 batadv_tt_orig_cache = kmem_cache_create("batadv_tt_orig_cache",
4471 SLAB_HWCACHE_ALIGN, NULL);
4472 if (!batadv_tt_orig_cache)
4473 goto err_tt_tg_destroy;
4475 batadv_tt_change_cache = kmem_cache_create("batadv_tt_change_cache",
4477 SLAB_HWCACHE_ALIGN, NULL);
4478 if (!batadv_tt_change_cache)
4479 goto err_tt_orig_destroy;
4481 batadv_tt_req_cache = kmem_cache_create("batadv_tt_req_cache",
4483 SLAB_HWCACHE_ALIGN, NULL);
4484 if (!batadv_tt_req_cache)
4485 goto err_tt_change_destroy;
4487 batadv_tt_roam_cache = kmem_cache_create("batadv_tt_roam_cache",
4489 SLAB_HWCACHE_ALIGN, NULL);
4490 if (!batadv_tt_roam_cache)
4491 goto err_tt_req_destroy;
4496 kmem_cache_destroy(batadv_tt_req_cache);
4497 batadv_tt_req_cache = NULL;
4498 err_tt_change_destroy:
4499 kmem_cache_destroy(batadv_tt_change_cache);
4500 batadv_tt_change_cache = NULL;
4501 err_tt_orig_destroy:
4502 kmem_cache_destroy(batadv_tt_orig_cache);
4503 batadv_tt_orig_cache = NULL;
4505 kmem_cache_destroy(batadv_tg_cache);
4506 batadv_tg_cache = NULL;
4508 kmem_cache_destroy(batadv_tl_cache);
4509 batadv_tl_cache = NULL;
4515 * batadv_tt_cache_destroy() - Destroy tt memory object cache
4517 void batadv_tt_cache_destroy(void)
4519 kmem_cache_destroy(batadv_tl_cache);
4520 kmem_cache_destroy(batadv_tg_cache);
4521 kmem_cache_destroy(batadv_tt_orig_cache);
4522 kmem_cache_destroy(batadv_tt_change_cache);
4523 kmem_cache_destroy(batadv_tt_req_cache);
4524 kmem_cache_destroy(batadv_tt_roam_cache);