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_removed_entry;
1341 struct batadv_tt_local_entry *tt_local_entry;
1342 u16 flags, curr_flags = BATADV_NO_FLAGS;
1343 struct hlist_node *tt_removed_node;
1345 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
1346 if (!tt_local_entry)
1349 curr_flags = tt_local_entry->common.flags;
1351 flags = BATADV_TT_CLIENT_DEL;
1352 /* if this global entry addition is due to a roaming, the node has to
1353 * mark the local entry as "roamed" in order to correctly reroute
1357 flags |= BATADV_TT_CLIENT_ROAM;
1358 /* mark the local client as ROAMed */
1359 tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM;
1362 if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) {
1363 batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags,
1367 /* if this client has been added right now, it is possible to
1368 * immediately purge it
1370 batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL);
1372 tt_removed_node = batadv_hash_remove(bat_priv->tt.local_hash,
1375 &tt_local_entry->common);
1376 if (!tt_removed_node)
1379 /* drop reference of remove hash entry */
1380 tt_removed_entry = hlist_entry(tt_removed_node,
1381 struct batadv_tt_local_entry,
1383 batadv_tt_local_entry_put(tt_removed_entry);
1387 batadv_tt_local_entry_put(tt_local_entry);
1393 * batadv_tt_local_purge_list() - purge inactive tt local entries
1394 * @bat_priv: the bat priv with all the soft interface information
1395 * @head: pointer to the list containing the local tt entries
1396 * @timeout: parameter deciding whether a given tt local entry is considered
1399 static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv,
1400 struct hlist_head *head,
1403 struct batadv_tt_local_entry *tt_local_entry;
1404 struct batadv_tt_common_entry *tt_common_entry;
1405 struct hlist_node *node_tmp;
1407 hlist_for_each_entry_safe(tt_common_entry, node_tmp, head,
1409 tt_local_entry = container_of(tt_common_entry,
1410 struct batadv_tt_local_entry,
1412 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE)
1415 /* entry already marked for deletion */
1416 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)
1419 if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout))
1422 batadv_tt_local_set_pending(bat_priv, tt_local_entry,
1423 BATADV_TT_CLIENT_DEL, "timed out");
1428 * batadv_tt_local_purge() - purge inactive tt local entries
1429 * @bat_priv: the bat priv with all the soft interface information
1430 * @timeout: parameter deciding whether a given tt local entry is considered
1433 static void batadv_tt_local_purge(struct batadv_priv *bat_priv,
1436 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
1437 struct hlist_head *head;
1438 spinlock_t *list_lock; /* protects write access to the hash lists */
1441 for (i = 0; i < hash->size; i++) {
1442 head = &hash->table[i];
1443 list_lock = &hash->list_locks[i];
1445 spin_lock_bh(list_lock);
1446 batadv_tt_local_purge_list(bat_priv, head, timeout);
1447 spin_unlock_bh(list_lock);
1451 static void batadv_tt_local_table_free(struct batadv_priv *bat_priv)
1453 struct batadv_hashtable *hash;
1454 spinlock_t *list_lock; /* protects write access to the hash lists */
1455 struct batadv_tt_common_entry *tt_common_entry;
1456 struct batadv_tt_local_entry *tt_local;
1457 struct hlist_node *node_tmp;
1458 struct hlist_head *head;
1461 if (!bat_priv->tt.local_hash)
1464 hash = bat_priv->tt.local_hash;
1466 for (i = 0; i < hash->size; i++) {
1467 head = &hash->table[i];
1468 list_lock = &hash->list_locks[i];
1470 spin_lock_bh(list_lock);
1471 hlist_for_each_entry_safe(tt_common_entry, node_tmp,
1473 hlist_del_rcu(&tt_common_entry->hash_entry);
1474 tt_local = container_of(tt_common_entry,
1475 struct batadv_tt_local_entry,
1478 batadv_tt_local_entry_put(tt_local);
1480 spin_unlock_bh(list_lock);
1483 batadv_hash_destroy(hash);
1485 bat_priv->tt.local_hash = NULL;
1488 static int batadv_tt_global_init(struct batadv_priv *bat_priv)
1490 if (bat_priv->tt.global_hash)
1493 bat_priv->tt.global_hash = batadv_hash_new(1024);
1495 if (!bat_priv->tt.global_hash)
1498 batadv_hash_set_lock_class(bat_priv->tt.global_hash,
1499 &batadv_tt_global_hash_lock_class_key);
1504 static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv)
1506 struct batadv_tt_change_node *entry, *safe;
1508 spin_lock_bh(&bat_priv->tt.changes_list_lock);
1510 list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
1512 list_del(&entry->list);
1513 kmem_cache_free(batadv_tt_change_cache, entry);
1516 atomic_set(&bat_priv->tt.local_changes, 0);
1517 spin_unlock_bh(&bat_priv->tt.changes_list_lock);
1521 * batadv_tt_global_orig_entry_find() - find a TT orig_list_entry
1522 * @entry: the TT global entry where the orig_list_entry has to be
1524 * @orig_node: the originator for which the orig_list_entry has to be found
1526 * retrieve the orig_tt_list_entry belonging to orig_node from the
1527 * batadv_tt_global_entry list
1529 * Return: it with an increased refcounter, NULL if not found
1531 static struct batadv_tt_orig_list_entry *
1532 batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry,
1533 const struct batadv_orig_node *orig_node)
1535 struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL;
1536 const struct hlist_head *head;
1539 head = &entry->orig_list;
1540 hlist_for_each_entry_rcu(tmp_orig_entry, head, list) {
1541 if (tmp_orig_entry->orig_node != orig_node)
1543 if (!kref_get_unless_zero(&tmp_orig_entry->refcount))
1546 orig_entry = tmp_orig_entry;
1555 * batadv_tt_global_entry_has_orig() - check if a TT global entry is also
1556 * handled by a given originator
1557 * @entry: the TT global entry to check
1558 * @orig_node: the originator to search in the list
1559 * @flags: a pointer to store TT flags for the given @entry received
1562 * find out if an orig_node is already in the list of a tt_global_entry.
1564 * Return: true if found, false otherwise
1567 batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry,
1568 const struct batadv_orig_node *orig_node,
1571 struct batadv_tt_orig_list_entry *orig_entry;
1574 orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node);
1579 *flags = orig_entry->flags;
1581 batadv_tt_orig_list_entry_put(orig_entry);
1588 * batadv_tt_global_sync_flags() - update TT sync flags
1589 * @tt_global: the TT global entry to update sync flags in
1591 * Updates the sync flag bits in the tt_global flag attribute with a logical
1592 * OR of all sync flags from any of its TT orig entries.
1595 batadv_tt_global_sync_flags(struct batadv_tt_global_entry *tt_global)
1597 struct batadv_tt_orig_list_entry *orig_entry;
1598 const struct hlist_head *head;
1599 u16 flags = BATADV_NO_FLAGS;
1602 head = &tt_global->orig_list;
1603 hlist_for_each_entry_rcu(orig_entry, head, list)
1604 flags |= orig_entry->flags;
1607 flags |= tt_global->common.flags & (~BATADV_TT_SYNC_MASK);
1608 tt_global->common.flags = flags;
1612 * batadv_tt_global_orig_entry_add() - add or update a TT orig entry
1613 * @tt_global: the TT global entry to add an orig entry in
1614 * @orig_node: the originator to add an orig entry for
1615 * @ttvn: translation table version number of this changeset
1616 * @flags: TT sync flags
1619 batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global,
1620 struct batadv_orig_node *orig_node, int ttvn,
1623 struct batadv_tt_orig_list_entry *orig_entry;
1625 spin_lock_bh(&tt_global->list_lock);
1627 orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node);
1629 /* refresh the ttvn: the current value could be a bogus one that
1630 * was added during a "temporary client detection"
1632 orig_entry->ttvn = ttvn;
1633 orig_entry->flags = flags;
1637 orig_entry = kmem_cache_zalloc(batadv_tt_orig_cache, GFP_ATOMIC);
1641 INIT_HLIST_NODE(&orig_entry->list);
1642 kref_get(&orig_node->refcount);
1643 batadv_tt_global_size_inc(orig_node, tt_global->common.vid);
1644 orig_entry->orig_node = orig_node;
1645 orig_entry->ttvn = ttvn;
1646 orig_entry->flags = flags;
1647 kref_init(&orig_entry->refcount);
1649 kref_get(&orig_entry->refcount);
1650 hlist_add_head_rcu(&orig_entry->list,
1651 &tt_global->orig_list);
1652 atomic_inc(&tt_global->orig_list_count);
1655 batadv_tt_global_sync_flags(tt_global);
1658 batadv_tt_orig_list_entry_put(orig_entry);
1660 spin_unlock_bh(&tt_global->list_lock);
1664 * batadv_tt_global_add() - add a new TT global entry or update an existing one
1665 * @bat_priv: the bat priv with all the soft interface information
1666 * @orig_node: the originator announcing the client
1667 * @tt_addr: the mac address of the non-mesh client
1668 * @vid: VLAN identifier
1669 * @flags: TT flags that have to be set for this non-mesh client
1670 * @ttvn: the tt version number ever announcing this non-mesh client
1672 * Add a new TT global entry for the given originator. If the entry already
1673 * exists add a new reference to the given originator (a global entry can have
1674 * references to multiple originators) and adjust the flags attribute to reflect
1675 * the function argument.
1676 * If a TT local entry exists for this non-mesh client remove it.
1678 * The caller must hold orig_node refcount.
1680 * Return: true if the new entry has been added, false otherwise
1682 static bool batadv_tt_global_add(struct batadv_priv *bat_priv,
1683 struct batadv_orig_node *orig_node,
1684 const unsigned char *tt_addr,
1685 unsigned short vid, u16 flags, u8 ttvn)
1687 struct batadv_tt_global_entry *tt_global_entry;
1688 struct batadv_tt_local_entry *tt_local_entry;
1691 struct batadv_tt_common_entry *common;
1694 /* ignore global entries from backbone nodes */
1695 if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid))
1698 tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid);
1699 tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid);
1701 /* if the node already has a local client for this entry, it has to wait
1702 * for a roaming advertisement instead of manually messing up the global
1705 if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry &&
1706 !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW))
1709 if (!tt_global_entry) {
1710 tt_global_entry = kmem_cache_zalloc(batadv_tg_cache,
1712 if (!tt_global_entry)
1715 common = &tt_global_entry->common;
1716 ether_addr_copy(common->addr, tt_addr);
1719 if (!is_multicast_ether_addr(common->addr))
1720 common->flags = flags & (~BATADV_TT_SYNC_MASK);
1722 tt_global_entry->roam_at = 0;
1723 /* node must store current time in case of roaming. This is
1724 * needed to purge this entry out on timeout (if nobody claims
1727 if (flags & BATADV_TT_CLIENT_ROAM)
1728 tt_global_entry->roam_at = jiffies;
1729 kref_init(&common->refcount);
1730 common->added_at = jiffies;
1732 INIT_HLIST_HEAD(&tt_global_entry->orig_list);
1733 atomic_set(&tt_global_entry->orig_list_count, 0);
1734 spin_lock_init(&tt_global_entry->list_lock);
1736 kref_get(&common->refcount);
1737 hash_added = batadv_hash_add(bat_priv->tt.global_hash,
1739 batadv_choose_tt, common,
1740 &common->hash_entry);
1742 if (unlikely(hash_added != 0)) {
1743 /* remove the reference for the hash */
1744 batadv_tt_global_entry_put(tt_global_entry);
1748 common = &tt_global_entry->common;
1749 /* If there is already a global entry, we can use this one for
1751 * But if we are trying to add a temporary client then here are
1752 * two options at this point:
1753 * 1) the global client is not a temporary client: the global
1754 * client has to be left as it is, temporary information
1755 * should never override any already known client state
1756 * 2) the global client is a temporary client: purge the
1757 * originator list and add the new one orig_entry
1759 if (flags & BATADV_TT_CLIENT_TEMP) {
1760 if (!(common->flags & BATADV_TT_CLIENT_TEMP))
1762 if (batadv_tt_global_entry_has_orig(tt_global_entry,
1765 batadv_tt_global_del_orig_list(tt_global_entry);
1766 goto add_orig_entry;
1769 /* if the client was temporary added before receiving the first
1770 * OGM announcing it, we have to clear the TEMP flag. Also,
1771 * remove the previous temporary orig node and re-add it
1772 * if required. If the orig entry changed, the new one which
1773 * is a non-temporary entry is preferred.
1775 if (common->flags & BATADV_TT_CLIENT_TEMP) {
1776 batadv_tt_global_del_orig_list(tt_global_entry);
1777 common->flags &= ~BATADV_TT_CLIENT_TEMP;
1780 /* the change can carry possible "attribute" flags like the
1781 * TT_CLIENT_TEMP, therefore they have to be copied in the
1784 if (!is_multicast_ether_addr(common->addr))
1785 common->flags |= flags & (~BATADV_TT_SYNC_MASK);
1787 /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only
1788 * one originator left in the list and we previously received a
1789 * delete + roaming change for this originator.
1791 * We should first delete the old originator before adding the
1794 if (common->flags & BATADV_TT_CLIENT_ROAM) {
1795 batadv_tt_global_del_orig_list(tt_global_entry);
1796 common->flags &= ~BATADV_TT_CLIENT_ROAM;
1797 tt_global_entry->roam_at = 0;
1801 /* add the new orig_entry (if needed) or update it */
1802 batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn,
1803 flags & BATADV_TT_SYNC_MASK);
1805 batadv_dbg(BATADV_DBG_TT, bat_priv,
1806 "Creating new global tt entry: %pM (vid: %d, via %pM)\n",
1807 common->addr, batadv_print_vid(common->vid),
1812 /* Do not remove multicast addresses from the local hash on
1815 if (is_multicast_ether_addr(tt_addr))
1818 /* remove address from local hash if present */
1819 local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid,
1820 "global tt received",
1821 flags & BATADV_TT_CLIENT_ROAM);
1822 tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI;
1824 if (!(flags & BATADV_TT_CLIENT_ROAM))
1825 /* this is a normal global add. Therefore the client is not in a
1826 * roaming state anymore.
1828 tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM;
1831 if (tt_global_entry)
1832 batadv_tt_global_entry_put(tt_global_entry);
1834 batadv_tt_local_entry_put(tt_local_entry);
1839 * batadv_transtable_best_orig() - Get best originator list entry from tt entry
1840 * @bat_priv: the bat priv with all the soft interface information
1841 * @tt_global_entry: global translation table entry to be analyzed
1843 * This functon assumes the caller holds rcu_read_lock().
1844 * Return: best originator list entry or NULL on errors.
1846 static struct batadv_tt_orig_list_entry *
1847 batadv_transtable_best_orig(struct batadv_priv *bat_priv,
1848 struct batadv_tt_global_entry *tt_global_entry)
1850 struct batadv_neigh_node *router, *best_router = NULL;
1851 struct batadv_algo_ops *bao = bat_priv->algo_ops;
1852 struct hlist_head *head;
1853 struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL;
1855 head = &tt_global_entry->orig_list;
1856 hlist_for_each_entry_rcu(orig_entry, head, list) {
1857 router = batadv_orig_router_get(orig_entry->orig_node,
1863 bao->neigh.cmp(router, BATADV_IF_DEFAULT, best_router,
1864 BATADV_IF_DEFAULT) <= 0) {
1865 batadv_neigh_node_put(router);
1869 /* release the refcount for the "old" best */
1871 batadv_neigh_node_put(best_router);
1873 best_entry = orig_entry;
1874 best_router = router;
1878 batadv_neigh_node_put(best_router);
1883 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1885 * batadv_tt_global_print_entry() - print all orig nodes who announce the
1886 * address for this global entry
1887 * @bat_priv: the bat priv with all the soft interface information
1888 * @tt_global_entry: global translation table entry to be printed
1889 * @seq: debugfs table seq_file struct
1891 * This functon assumes the caller holds rcu_read_lock().
1894 batadv_tt_global_print_entry(struct batadv_priv *bat_priv,
1895 struct batadv_tt_global_entry *tt_global_entry,
1896 struct seq_file *seq)
1898 struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
1899 struct batadv_tt_common_entry *tt_common_entry;
1900 struct batadv_orig_node_vlan *vlan;
1901 struct hlist_head *head;
1905 tt_common_entry = &tt_global_entry->common;
1906 flags = tt_common_entry->flags;
1908 best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
1910 vlan = batadv_orig_node_vlan_get(best_entry->orig_node,
1911 tt_common_entry->vid);
1914 " * Cannot retrieve VLAN %d for originator %pM\n",
1915 batadv_print_vid(tt_common_entry->vid),
1916 best_entry->orig_node->orig);
1920 last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn);
1922 " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1923 '*', tt_global_entry->common.addr,
1924 batadv_print_vid(tt_global_entry->common.vid),
1925 best_entry->ttvn, best_entry->orig_node->orig,
1926 last_ttvn, vlan->tt.crc,
1927 ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'),
1928 ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'),
1929 ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'),
1930 ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.'));
1932 batadv_orig_node_vlan_put(vlan);
1936 head = &tt_global_entry->orig_list;
1938 hlist_for_each_entry_rcu(orig_entry, head, list) {
1939 if (best_entry == orig_entry)
1942 vlan = batadv_orig_node_vlan_get(orig_entry->orig_node,
1943 tt_common_entry->vid);
1946 " + Cannot retrieve VLAN %d for originator %pM\n",
1947 batadv_print_vid(tt_common_entry->vid),
1948 orig_entry->orig_node->orig);
1952 last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn);
1954 " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1955 '+', tt_global_entry->common.addr,
1956 batadv_print_vid(tt_global_entry->common.vid),
1957 orig_entry->ttvn, orig_entry->orig_node->orig,
1958 last_ttvn, vlan->tt.crc,
1959 ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'),
1960 ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'),
1961 ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'),
1962 ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.'));
1964 batadv_orig_node_vlan_put(vlan);
1969 * batadv_tt_global_seq_print_text() - Print the global tt table in a seq file
1970 * @seq: seq file to print on
1975 int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset)
1977 struct net_device *net_dev = (struct net_device *)seq->private;
1978 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1979 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
1980 struct batadv_tt_common_entry *tt_common_entry;
1981 struct batadv_tt_global_entry *tt_global;
1982 struct batadv_hard_iface *primary_if;
1983 struct hlist_head *head;
1986 primary_if = batadv_seq_print_text_primary_if_get(seq);
1991 "Globally announced TT entries received via the mesh %s\n",
1994 " Client VID (TTVN) Originator (Curr TTVN) (CRC ) Flags\n");
1996 for (i = 0; i < hash->size; i++) {
1997 head = &hash->table[i];
2000 hlist_for_each_entry_rcu(tt_common_entry,
2002 tt_global = container_of(tt_common_entry,
2003 struct batadv_tt_global_entry,
2005 batadv_tt_global_print_entry(bat_priv, tt_global, seq);
2011 batadv_hardif_put(primary_if);
2017 * batadv_tt_global_dump_subentry() - Dump all TT local entries into a message
2018 * @msg: Netlink message to dump into
2019 * @portid: Port making netlink request
2020 * @seq: Sequence number of netlink message
2021 * @common: tt local & tt global common data
2022 * @orig: Originator node announcing a non-mesh client
2023 * @best: Is the best originator for the TT entry
2025 * Return: Error code, or 0 on success
2028 batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq,
2029 struct batadv_tt_common_entry *common,
2030 struct batadv_tt_orig_list_entry *orig,
2033 u16 flags = (common->flags & (~BATADV_TT_SYNC_MASK)) | orig->flags;
2035 struct batadv_orig_node_vlan *vlan;
2039 vlan = batadv_orig_node_vlan_get(orig->orig_node,
2046 batadv_orig_node_vlan_put(vlan);
2048 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
2050 BATADV_CMD_GET_TRANSTABLE_GLOBAL);
2054 last_ttvn = atomic_read(&orig->orig_node->last_ttvn);
2056 if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) ||
2057 nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN,
2058 orig->orig_node->orig) ||
2059 nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) ||
2060 nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) ||
2061 nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) ||
2062 nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) ||
2063 nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, flags))
2064 goto nla_put_failure;
2066 if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST))
2067 goto nla_put_failure;
2069 genlmsg_end(msg, hdr);
2073 genlmsg_cancel(msg, hdr);
2078 * batadv_tt_global_dump_entry() - Dump one TT global entry into a message
2079 * @msg: Netlink message to dump into
2080 * @portid: Port making netlink request
2081 * @seq: Sequence number of netlink message
2082 * @bat_priv: The bat priv with all the soft interface information
2083 * @common: tt local & tt global common data
2084 * @sub_s: Number of entries to skip
2086 * This function assumes the caller holds rcu_read_lock().
2088 * Return: Error code, or 0 on success
2091 batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
2092 struct batadv_priv *bat_priv,
2093 struct batadv_tt_common_entry *common, int *sub_s)
2095 struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
2096 struct batadv_tt_global_entry *global;
2097 struct hlist_head *head;
2101 global = container_of(common, struct batadv_tt_global_entry, common);
2102 best_entry = batadv_transtable_best_orig(bat_priv, global);
2103 head = &global->orig_list;
2105 hlist_for_each_entry_rcu(orig_entry, head, list) {
2109 best = (orig_entry == best_entry);
2111 if (batadv_tt_global_dump_subentry(msg, portid, seq, common,
2112 orig_entry, best)) {
2123 * batadv_tt_global_dump_bucket() - Dump one TT local bucket into a message
2124 * @msg: Netlink message to dump into
2125 * @portid: Port making netlink request
2126 * @seq: Sequence number of netlink message
2127 * @bat_priv: The bat priv with all the soft interface information
2128 * @head: Pointer to the list containing the global tt entries
2129 * @idx_s: Number of entries to skip
2130 * @sub: Number of entries to skip
2132 * Return: Error code, or 0 on success
2135 batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq,
2136 struct batadv_priv *bat_priv,
2137 struct hlist_head *head, int *idx_s, int *sub)
2139 struct batadv_tt_common_entry *common;
2143 hlist_for_each_entry_rcu(common, head, hash_entry) {
2147 if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv,
2162 * batadv_tt_global_dump() - Dump TT global entries into a message
2163 * @msg: Netlink message to dump into
2164 * @cb: Parameters from query
2166 * Return: Error code, or length of message on success
2168 int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb)
2170 struct net *net = sock_net(cb->skb->sk);
2171 struct net_device *soft_iface;
2172 struct batadv_priv *bat_priv;
2173 struct batadv_hard_iface *primary_if = NULL;
2174 struct batadv_hashtable *hash;
2175 struct hlist_head *head;
2178 int bucket = cb->args[0];
2179 int idx = cb->args[1];
2180 int sub = cb->args[2];
2181 int portid = NETLINK_CB(cb->skb).portid;
2183 ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
2187 soft_iface = dev_get_by_index(net, ifindex);
2188 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
2193 bat_priv = netdev_priv(soft_iface);
2195 primary_if = batadv_primary_if_get_selected(bat_priv);
2196 if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
2201 hash = bat_priv->tt.global_hash;
2203 while (bucket < hash->size) {
2204 head = &hash->table[bucket];
2206 if (batadv_tt_global_dump_bucket(msg, portid,
2207 cb->nlh->nlmsg_seq, bat_priv,
2218 batadv_hardif_put(primary_if);
2220 dev_put(soft_iface);
2222 cb->args[0] = bucket;
2230 * _batadv_tt_global_del_orig_entry() - remove and free an orig_entry
2231 * @tt_global_entry: the global entry to remove the orig_entry from
2232 * @orig_entry: the orig entry to remove and free
2234 * Remove an orig_entry from its list in the given tt_global_entry and
2235 * free this orig_entry afterwards.
2237 * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is
2241 _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry,
2242 struct batadv_tt_orig_list_entry *orig_entry)
2244 lockdep_assert_held(&tt_global_entry->list_lock);
2246 batadv_tt_global_size_dec(orig_entry->orig_node,
2247 tt_global_entry->common.vid);
2248 atomic_dec(&tt_global_entry->orig_list_count);
2249 /* requires holding tt_global_entry->list_lock and orig_entry->list
2250 * being part of a list
2252 hlist_del_rcu(&orig_entry->list);
2253 batadv_tt_orig_list_entry_put(orig_entry);
2256 /* deletes the orig list of a tt_global_entry */
2258 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry)
2260 struct hlist_head *head;
2261 struct hlist_node *safe;
2262 struct batadv_tt_orig_list_entry *orig_entry;
2264 spin_lock_bh(&tt_global_entry->list_lock);
2265 head = &tt_global_entry->orig_list;
2266 hlist_for_each_entry_safe(orig_entry, safe, head, list)
2267 _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry);
2268 spin_unlock_bh(&tt_global_entry->list_lock);
2272 * batadv_tt_global_del_orig_node() - remove orig_node from a global tt entry
2273 * @bat_priv: the bat priv with all the soft interface information
2274 * @tt_global_entry: the global entry to remove the orig_node from
2275 * @orig_node: the originator announcing the client
2276 * @message: message to append to the log on deletion
2278 * Remove the given orig_node and its according orig_entry from the given
2282 batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv,
2283 struct batadv_tt_global_entry *tt_global_entry,
2284 struct batadv_orig_node *orig_node,
2285 const char *message)
2287 struct hlist_head *head;
2288 struct hlist_node *safe;
2289 struct batadv_tt_orig_list_entry *orig_entry;
2292 spin_lock_bh(&tt_global_entry->list_lock);
2293 head = &tt_global_entry->orig_list;
2294 hlist_for_each_entry_safe(orig_entry, safe, head, list) {
2295 if (orig_entry->orig_node == orig_node) {
2296 vid = tt_global_entry->common.vid;
2297 batadv_dbg(BATADV_DBG_TT, bat_priv,
2298 "Deleting %pM from global tt entry %pM (vid: %d): %s\n",
2300 tt_global_entry->common.addr,
2301 batadv_print_vid(vid), message);
2302 _batadv_tt_global_del_orig_entry(tt_global_entry,
2306 spin_unlock_bh(&tt_global_entry->list_lock);
2309 /* If the client is to be deleted, we check if it is the last origantor entry
2310 * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the
2311 * timer, otherwise we simply remove the originator scheduled for deletion.
2314 batadv_tt_global_del_roaming(struct batadv_priv *bat_priv,
2315 struct batadv_tt_global_entry *tt_global_entry,
2316 struct batadv_orig_node *orig_node,
2317 const char *message)
2319 bool last_entry = true;
2320 struct hlist_head *head;
2321 struct batadv_tt_orig_list_entry *orig_entry;
2323 /* no local entry exists, case 1:
2324 * Check if this is the last one or if other entries exist.
2328 head = &tt_global_entry->orig_list;
2329 hlist_for_each_entry_rcu(orig_entry, head, list) {
2330 if (orig_entry->orig_node != orig_node) {
2338 /* its the last one, mark for roaming. */
2339 tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM;
2340 tt_global_entry->roam_at = jiffies;
2342 /* there is another entry, we can simply delete this
2343 * one and can still use the other one.
2345 batadv_tt_global_del_orig_node(bat_priv, tt_global_entry,
2346 orig_node, message);
2351 * batadv_tt_global_del() - remove a client from the global table
2352 * @bat_priv: the bat priv with all the soft interface information
2353 * @orig_node: an originator serving this client
2354 * @addr: the mac address of the client
2355 * @vid: VLAN identifier
2356 * @message: a message explaining the reason for deleting the client to print
2357 * for debugging purpose
2358 * @roaming: true if the deletion has been triggered by a roaming event
2360 static void batadv_tt_global_del(struct batadv_priv *bat_priv,
2361 struct batadv_orig_node *orig_node,
2362 const unsigned char *addr, unsigned short vid,
2363 const char *message, bool roaming)
2365 struct batadv_tt_global_entry *tt_global_entry;
2366 struct batadv_tt_local_entry *local_entry = NULL;
2368 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
2369 if (!tt_global_entry)
2373 batadv_tt_global_del_orig_node(bat_priv, tt_global_entry,
2374 orig_node, message);
2376 if (hlist_empty(&tt_global_entry->orig_list))
2377 batadv_tt_global_free(bat_priv, tt_global_entry,
2383 /* if we are deleting a global entry due to a roam
2384 * event, there are two possibilities:
2385 * 1) the client roamed from node A to node B => if there
2386 * is only one originator left for this client, we mark
2387 * it with BATADV_TT_CLIENT_ROAM, we start a timer and we
2388 * wait for node B to claim it. In case of timeout
2389 * the entry is purged.
2391 * If there are other originators left, we directly delete
2393 * 2) the client roamed to us => we can directly delete
2394 * the global entry, since it is useless now.
2396 local_entry = batadv_tt_local_hash_find(bat_priv,
2397 tt_global_entry->common.addr,
2400 /* local entry exists, case 2: client roamed to us. */
2401 batadv_tt_global_del_orig_list(tt_global_entry);
2402 batadv_tt_global_free(bat_priv, tt_global_entry, message);
2404 /* no local entry exists, case 1: check for roaming */
2405 batadv_tt_global_del_roaming(bat_priv, tt_global_entry,
2406 orig_node, message);
2410 if (tt_global_entry)
2411 batadv_tt_global_entry_put(tt_global_entry);
2413 batadv_tt_local_entry_put(local_entry);
2417 * batadv_tt_global_del_orig() - remove all the TT global entries belonging to
2418 * the given originator matching the provided vid
2419 * @bat_priv: the bat priv with all the soft interface information
2420 * @orig_node: the originator owning the entries to remove
2421 * @match_vid: the VLAN identifier to match. If negative all the entries will be
2423 * @message: debug message to print as "reason"
2425 void batadv_tt_global_del_orig(struct batadv_priv *bat_priv,
2426 struct batadv_orig_node *orig_node,
2428 const char *message)
2430 struct batadv_tt_global_entry *tt_global;
2431 struct batadv_tt_common_entry *tt_common_entry;
2433 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2434 struct hlist_node *safe;
2435 struct hlist_head *head;
2436 spinlock_t *list_lock; /* protects write access to the hash lists */
2442 for (i = 0; i < hash->size; i++) {
2443 head = &hash->table[i];
2444 list_lock = &hash->list_locks[i];
2446 spin_lock_bh(list_lock);
2447 hlist_for_each_entry_safe(tt_common_entry, safe,
2449 /* remove only matching entries */
2450 if (match_vid >= 0 && tt_common_entry->vid != match_vid)
2453 tt_global = container_of(tt_common_entry,
2454 struct batadv_tt_global_entry,
2457 batadv_tt_global_del_orig_node(bat_priv, tt_global,
2458 orig_node, message);
2460 if (hlist_empty(&tt_global->orig_list)) {
2461 vid = tt_global->common.vid;
2462 batadv_dbg(BATADV_DBG_TT, bat_priv,
2463 "Deleting global tt entry %pM (vid: %d): %s\n",
2464 tt_global->common.addr,
2465 batadv_print_vid(vid), message);
2466 hlist_del_rcu(&tt_common_entry->hash_entry);
2467 batadv_tt_global_entry_put(tt_global);
2470 spin_unlock_bh(list_lock);
2472 clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized);
2475 static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global,
2479 unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT;
2480 unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT;
2482 if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) &&
2483 batadv_has_timed_out(tt_global->roam_at, roam_timeout)) {
2485 *msg = "Roaming timeout\n";
2488 if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) &&
2489 batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) {
2491 *msg = "Temporary client timeout\n";
2497 static void batadv_tt_global_purge(struct batadv_priv *bat_priv)
2499 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2500 struct hlist_head *head;
2501 struct hlist_node *node_tmp;
2502 spinlock_t *list_lock; /* protects write access to the hash lists */
2505 struct batadv_tt_common_entry *tt_common;
2506 struct batadv_tt_global_entry *tt_global;
2508 for (i = 0; i < hash->size; i++) {
2509 head = &hash->table[i];
2510 list_lock = &hash->list_locks[i];
2512 spin_lock_bh(list_lock);
2513 hlist_for_each_entry_safe(tt_common, node_tmp, head,
2515 tt_global = container_of(tt_common,
2516 struct batadv_tt_global_entry,
2519 if (!batadv_tt_global_to_purge(tt_global, &msg))
2522 batadv_dbg(BATADV_DBG_TT, bat_priv,
2523 "Deleting global tt entry %pM (vid: %d): %s\n",
2524 tt_global->common.addr,
2525 batadv_print_vid(tt_global->common.vid),
2528 hlist_del_rcu(&tt_common->hash_entry);
2530 batadv_tt_global_entry_put(tt_global);
2532 spin_unlock_bh(list_lock);
2536 static void batadv_tt_global_table_free(struct batadv_priv *bat_priv)
2538 struct batadv_hashtable *hash;
2539 spinlock_t *list_lock; /* protects write access to the hash lists */
2540 struct batadv_tt_common_entry *tt_common_entry;
2541 struct batadv_tt_global_entry *tt_global;
2542 struct hlist_node *node_tmp;
2543 struct hlist_head *head;
2546 if (!bat_priv->tt.global_hash)
2549 hash = bat_priv->tt.global_hash;
2551 for (i = 0; i < hash->size; i++) {
2552 head = &hash->table[i];
2553 list_lock = &hash->list_locks[i];
2555 spin_lock_bh(list_lock);
2556 hlist_for_each_entry_safe(tt_common_entry, node_tmp,
2558 hlist_del_rcu(&tt_common_entry->hash_entry);
2559 tt_global = container_of(tt_common_entry,
2560 struct batadv_tt_global_entry,
2562 batadv_tt_global_entry_put(tt_global);
2564 spin_unlock_bh(list_lock);
2567 batadv_hash_destroy(hash);
2569 bat_priv->tt.global_hash = NULL;
2573 _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry,
2574 struct batadv_tt_global_entry *tt_global_entry)
2576 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI &&
2577 tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI)
2580 /* check if the two clients are marked as isolated */
2581 if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA &&
2582 tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA)
2589 * batadv_transtable_search() - get the mesh destination for a given client
2590 * @bat_priv: the bat priv with all the soft interface information
2591 * @src: mac address of the source client
2592 * @addr: mac address of the destination client
2593 * @vid: VLAN identifier
2595 * Return: a pointer to the originator that was selected as destination in the
2596 * mesh for contacting the client 'addr', NULL otherwise.
2597 * In case of multiple originators serving the same client, the function returns
2598 * the best one (best in terms of metric towards the destination node).
2600 * If the two clients are AP isolated the function returns NULL.
2602 struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv,
2607 struct batadv_tt_local_entry *tt_local_entry = NULL;
2608 struct batadv_tt_global_entry *tt_global_entry = NULL;
2609 struct batadv_orig_node *orig_node = NULL;
2610 struct batadv_tt_orig_list_entry *best_entry;
2612 if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) {
2613 tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid);
2614 if (!tt_local_entry ||
2615 (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING))
2619 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
2620 if (!tt_global_entry)
2623 /* check whether the clients should not communicate due to AP
2626 if (tt_local_entry &&
2627 _batadv_is_ap_isolated(tt_local_entry, tt_global_entry))
2631 best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
2632 /* found anything? */
2634 orig_node = best_entry->orig_node;
2635 if (orig_node && !kref_get_unless_zero(&orig_node->refcount))
2640 if (tt_global_entry)
2641 batadv_tt_global_entry_put(tt_global_entry);
2643 batadv_tt_local_entry_put(tt_local_entry);
2649 * batadv_tt_global_crc() - calculates the checksum of the local table belonging
2650 * to the given orig_node
2651 * @bat_priv: the bat priv with all the soft interface information
2652 * @orig_node: originator for which the CRC should be computed
2653 * @vid: VLAN identifier for which the CRC32 has to be computed
2655 * This function computes the checksum for the global table corresponding to a
2656 * specific originator. In particular, the checksum is computed as follows: For
2657 * each client connected to the originator the CRC32C of the MAC address and the
2658 * VID is computed and then all the CRC32Cs of the various clients are xor'ed
2661 * The idea behind is that CRC32C should be used as much as possible in order to
2662 * produce a unique hash of the table, but since the order which is used to feed
2663 * the CRC32C function affects the result and since every node in the network
2664 * probably sorts the clients differently, the hash function cannot be directly
2665 * computed over the entire table. Hence the CRC32C is used only on
2666 * the single client entry, while all the results are then xor'ed together
2667 * because the XOR operation can combine them all while trying to reduce the
2668 * noise as much as possible.
2670 * Return: the checksum of the global table of a given originator.
2672 static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv,
2673 struct batadv_orig_node *orig_node,
2676 struct batadv_hashtable *hash = bat_priv->tt.global_hash;
2677 struct batadv_tt_orig_list_entry *tt_orig;
2678 struct batadv_tt_common_entry *tt_common;
2679 struct batadv_tt_global_entry *tt_global;
2680 struct hlist_head *head;
2681 u32 i, crc_tmp, crc = 0;
2685 for (i = 0; i < hash->size; i++) {
2686 head = &hash->table[i];
2689 hlist_for_each_entry_rcu(tt_common, head, hash_entry) {
2690 tt_global = container_of(tt_common,
2691 struct batadv_tt_global_entry,
2693 /* compute the CRC only for entries belonging to the
2694 * VLAN identified by the vid passed as parameter
2696 if (tt_common->vid != vid)
2699 /* Roaming clients are in the global table for
2700 * consistency only. They don't have to be
2701 * taken into account while computing the
2704 if (tt_common->flags & BATADV_TT_CLIENT_ROAM)
2706 /* Temporary clients have not been announced yet, so
2707 * they have to be skipped while computing the global
2710 if (tt_common->flags & BATADV_TT_CLIENT_TEMP)
2713 /* find out if this global entry is announced by this
2716 tt_orig = batadv_tt_global_orig_entry_find(tt_global,
2721 /* use network order to read the VID: this ensures that
2722 * every node reads the bytes in the same order.
2724 tmp_vid = htons(tt_common->vid);
2725 crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid));
2727 /* compute the CRC on flags that have to be kept in sync
2730 flags = tt_orig->flags;
2731 crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
2733 crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
2735 batadv_tt_orig_list_entry_put(tt_orig);
2744 * batadv_tt_local_crc() - calculates the checksum of the local table
2745 * @bat_priv: the bat priv with all the soft interface information
2746 * @vid: VLAN identifier for which the CRC32 has to be computed
2748 * For details about the computation, please refer to the documentation for
2749 * batadv_tt_global_crc().
2751 * Return: the checksum of the local table
2753 static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv,
2756 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
2757 struct batadv_tt_common_entry *tt_common;
2758 struct hlist_head *head;
2759 u32 i, crc_tmp, crc = 0;
2763 for (i = 0; i < hash->size; i++) {
2764 head = &hash->table[i];
2767 hlist_for_each_entry_rcu(tt_common, head, hash_entry) {
2768 /* compute the CRC only for entries belonging to the
2769 * VLAN identified by vid
2771 if (tt_common->vid != vid)
2774 /* not yet committed clients have not to be taken into
2775 * account while computing the CRC
2777 if (tt_common->flags & BATADV_TT_CLIENT_NEW)
2780 /* use network order to read the VID: this ensures that
2781 * every node reads the bytes in the same order.
2783 tmp_vid = htons(tt_common->vid);
2784 crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid));
2786 /* compute the CRC on flags that have to be kept in sync
2789 flags = tt_common->flags & BATADV_TT_SYNC_MASK;
2790 crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
2792 crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
2801 * batadv_tt_req_node_release() - free tt_req node entry
2802 * @ref: kref pointer of the tt req_node entry
2804 static void batadv_tt_req_node_release(struct kref *ref)
2806 struct batadv_tt_req_node *tt_req_node;
2808 tt_req_node = container_of(ref, struct batadv_tt_req_node, refcount);
2810 kmem_cache_free(batadv_tt_req_cache, tt_req_node);
2814 * batadv_tt_req_node_put() - decrement the tt_req_node refcounter and
2815 * possibly release it
2816 * @tt_req_node: tt_req_node to be free'd
2818 static void batadv_tt_req_node_put(struct batadv_tt_req_node *tt_req_node)
2820 kref_put(&tt_req_node->refcount, batadv_tt_req_node_release);
2823 static void batadv_tt_req_list_free(struct batadv_priv *bat_priv)
2825 struct batadv_tt_req_node *node;
2826 struct hlist_node *safe;
2828 spin_lock_bh(&bat_priv->tt.req_list_lock);
2830 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
2831 hlist_del_init(&node->list);
2832 batadv_tt_req_node_put(node);
2835 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2838 static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv,
2839 struct batadv_orig_node *orig_node,
2840 const void *tt_buff,
2843 /* Replace the old buffer only if I received something in the
2844 * last OGM (the OGM could carry no changes)
2846 spin_lock_bh(&orig_node->tt_buff_lock);
2847 if (tt_buff_len > 0) {
2848 kfree(orig_node->tt_buff);
2849 orig_node->tt_buff_len = 0;
2850 orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC);
2851 if (orig_node->tt_buff) {
2852 memcpy(orig_node->tt_buff, tt_buff, tt_buff_len);
2853 orig_node->tt_buff_len = tt_buff_len;
2856 spin_unlock_bh(&orig_node->tt_buff_lock);
2859 static void batadv_tt_req_purge(struct batadv_priv *bat_priv)
2861 struct batadv_tt_req_node *node;
2862 struct hlist_node *safe;
2864 spin_lock_bh(&bat_priv->tt.req_list_lock);
2865 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
2866 if (batadv_has_timed_out(node->issued_at,
2867 BATADV_TT_REQUEST_TIMEOUT)) {
2868 hlist_del_init(&node->list);
2869 batadv_tt_req_node_put(node);
2872 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2876 * batadv_tt_req_node_new() - search and possibly create a tt_req_node object
2877 * @bat_priv: the bat priv with all the soft interface information
2878 * @orig_node: orig node this request is being issued for
2880 * Return: the pointer to the new tt_req_node struct if no request
2881 * has already been issued for this orig_node, NULL otherwise.
2883 static struct batadv_tt_req_node *
2884 batadv_tt_req_node_new(struct batadv_priv *bat_priv,
2885 struct batadv_orig_node *orig_node)
2887 struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL;
2889 spin_lock_bh(&bat_priv->tt.req_list_lock);
2890 hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) {
2891 if (batadv_compare_eth(tt_req_node_tmp, orig_node) &&
2892 !batadv_has_timed_out(tt_req_node_tmp->issued_at,
2893 BATADV_TT_REQUEST_TIMEOUT))
2897 tt_req_node = kmem_cache_alloc(batadv_tt_req_cache, GFP_ATOMIC);
2901 kref_init(&tt_req_node->refcount);
2902 ether_addr_copy(tt_req_node->addr, orig_node->orig);
2903 tt_req_node->issued_at = jiffies;
2905 kref_get(&tt_req_node->refcount);
2906 hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list);
2908 spin_unlock_bh(&bat_priv->tt.req_list_lock);
2913 * batadv_tt_local_valid() - verify local tt entry and get flags
2914 * @entry_ptr: to be checked local tt entry
2915 * @data_ptr: not used but definition required to satisfy the callback prototype
2916 * @flags: a pointer to store TT flags for this client to
2918 * Checks the validity of the given local TT entry. If it is, then the provided
2919 * flags pointer is updated.
2921 * Return: true if the entry is a valid, false otherwise.
2923 static bool batadv_tt_local_valid(const void *entry_ptr,
2924 const void *data_ptr,
2927 const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
2929 if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW)
2933 *flags = tt_common_entry->flags;
2939 * batadv_tt_global_valid() - verify global tt entry and get flags
2940 * @entry_ptr: to be checked global tt entry
2941 * @data_ptr: an orig_node object (may be NULL)
2942 * @flags: a pointer to store TT flags for this client to
2944 * Checks the validity of the given global TT entry. If it is, then the provided
2945 * flags pointer is updated either with the common (summed) TT flags if data_ptr
2946 * is NULL or the specific, per originator TT flags otherwise.
2948 * Return: true if the entry is a valid, false otherwise.
2950 static bool batadv_tt_global_valid(const void *entry_ptr,
2951 const void *data_ptr,
2954 const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
2955 const struct batadv_tt_global_entry *tt_global_entry;
2956 const struct batadv_orig_node *orig_node = data_ptr;
2958 if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM ||
2959 tt_common_entry->flags & BATADV_TT_CLIENT_TEMP)
2962 tt_global_entry = container_of(tt_common_entry,
2963 struct batadv_tt_global_entry,
2966 return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node,
2971 * batadv_tt_tvlv_generate() - fill the tvlv buff with the tt entries from the
2973 * @bat_priv: the bat priv with all the soft interface information
2974 * @hash: hash table containing the tt entries
2975 * @tt_len: expected tvlv tt data buffer length in number of bytes
2976 * @tvlv_buff: pointer to the buffer to fill with the TT data
2977 * @valid_cb: function to filter tt change entries and to return TT flags
2978 * @cb_data: data passed to the filter function as argument
2980 * Fills the tvlv buff with the tt entries from the specified hash. If valid_cb
2981 * is not provided then this becomes a no-op.
2983 static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
2984 struct batadv_hashtable *hash,
2985 void *tvlv_buff, u16 tt_len,
2986 bool (*valid_cb)(const void *,
2991 struct batadv_tt_common_entry *tt_common_entry;
2992 struct batadv_tvlv_tt_change *tt_change;
2993 struct hlist_head *head;
2994 u16 tt_tot, tt_num_entries = 0;
2999 tt_tot = batadv_tt_entries(tt_len);
3000 tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff;
3006 for (i = 0; i < hash->size; i++) {
3007 head = &hash->table[i];
3009 hlist_for_each_entry_rcu(tt_common_entry,
3011 if (tt_tot == tt_num_entries)
3014 ret = valid_cb(tt_common_entry, cb_data, &flags);
3018 ether_addr_copy(tt_change->addr, tt_common_entry->addr);
3019 tt_change->flags = flags;
3020 tt_change->vid = htons(tt_common_entry->vid);
3021 memset(tt_change->reserved, 0,
3022 sizeof(tt_change->reserved));
3032 * batadv_tt_global_check_crc() - check if all the CRCs are correct
3033 * @orig_node: originator for which the CRCs have to be checked
3034 * @tt_vlan: pointer to the first tvlv VLAN entry
3035 * @num_vlan: number of tvlv VLAN entries
3037 * Return: true if all the received CRCs match the locally stored ones, false
3040 static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node,
3041 struct batadv_tvlv_tt_vlan_data *tt_vlan,
3044 struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp;
3045 struct batadv_orig_node_vlan *vlan;
3046 int i, orig_num_vlan;
3049 /* check if each received CRC matches the locally stored one */
3050 for (i = 0; i < num_vlan; i++) {
3051 tt_vlan_tmp = tt_vlan + i;
3053 /* if orig_node is a backbone node for this VLAN, don't check
3054 * the CRC as we ignore all the global entries over it
3056 if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv,
3058 ntohs(tt_vlan_tmp->vid)))
3061 vlan = batadv_orig_node_vlan_get(orig_node,
3062 ntohs(tt_vlan_tmp->vid));
3067 batadv_orig_node_vlan_put(vlan);
3069 if (crc != ntohl(tt_vlan_tmp->crc))
3073 /* check if any excess VLANs exist locally for the originator
3074 * which are not mentioned in the TVLV from the originator.
3078 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list)
3082 if (orig_num_vlan > num_vlan)
3089 * batadv_tt_local_update_crc() - update all the local CRCs
3090 * @bat_priv: the bat priv with all the soft interface information
3092 static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv)
3094 struct batadv_softif_vlan *vlan;
3096 /* recompute the global CRC for each VLAN */
3098 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
3099 vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid);
3105 * batadv_tt_global_update_crc() - update all the global CRCs for this orig_node
3106 * @bat_priv: the bat priv with all the soft interface information
3107 * @orig_node: the orig_node for which the CRCs have to be updated
3109 static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv,
3110 struct batadv_orig_node *orig_node)
3112 struct batadv_orig_node_vlan *vlan;
3115 /* recompute the global CRC for each VLAN */
3117 hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
3118 /* if orig_node is a backbone node for this VLAN, don't compute
3119 * the CRC as we ignore all the global entries over it
3121 if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig,
3125 crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid);
3132 * batadv_send_tt_request() - send a TT Request message to a given node
3133 * @bat_priv: the bat priv with all the soft interface information
3134 * @dst_orig_node: the destination of the message
3135 * @ttvn: the version number that the source of the message is looking for
3136 * @tt_vlan: pointer to the first tvlv VLAN object to request
3137 * @num_vlan: number of tvlv VLAN entries
3138 * @full_table: ask for the entire translation table if true, while only for the
3139 * last TT diff otherwise
3141 * Return: true if the TT Request was sent, false otherwise
3143 static bool batadv_send_tt_request(struct batadv_priv *bat_priv,
3144 struct batadv_orig_node *dst_orig_node,
3146 struct batadv_tvlv_tt_vlan_data *tt_vlan,
3147 u16 num_vlan, bool full_table)
3149 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3150 struct batadv_tt_req_node *tt_req_node = NULL;
3151 struct batadv_tvlv_tt_vlan_data *tt_vlan_req;
3152 struct batadv_hard_iface *primary_if;
3156 primary_if = batadv_primary_if_get_selected(bat_priv);
3160 /* The new tt_req will be issued only if I'm not waiting for a
3161 * reply from the same orig_node yet
3163 tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node);
3167 size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan;
3168 tvlv_tt_data = kzalloc(size, GFP_ATOMIC);
3172 tvlv_tt_data->flags = BATADV_TT_REQUEST;
3173 tvlv_tt_data->ttvn = ttvn;
3174 tvlv_tt_data->num_vlan = htons(num_vlan);
3176 /* send all the CRCs within the request. This is needed by intermediate
3177 * nodes to ensure they have the correct table before replying
3179 tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1);
3180 for (i = 0; i < num_vlan; i++) {
3181 tt_vlan_req->vid = tt_vlan->vid;
3182 tt_vlan_req->crc = tt_vlan->crc;
3189 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3191 batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n",
3192 dst_orig_node->orig, full_table ? 'F' : '.');
3194 batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX);
3195 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3196 dst_orig_node->orig, BATADV_TVLV_TT, 1,
3197 tvlv_tt_data, size);
3202 batadv_hardif_put(primary_if);
3204 if (ret && tt_req_node) {
3205 spin_lock_bh(&bat_priv->tt.req_list_lock);
3206 if (!hlist_unhashed(&tt_req_node->list)) {
3207 hlist_del_init(&tt_req_node->list);
3208 batadv_tt_req_node_put(tt_req_node);
3210 spin_unlock_bh(&bat_priv->tt.req_list_lock);
3214 batadv_tt_req_node_put(tt_req_node);
3216 kfree(tvlv_tt_data);
3221 * batadv_send_other_tt_response() - send reply to tt request concerning another
3222 * node's translation table
3223 * @bat_priv: the bat priv with all the soft interface information
3224 * @tt_data: tt data containing the tt request information
3225 * @req_src: mac address of tt request sender
3226 * @req_dst: mac address of tt request recipient
3228 * Return: true if tt request reply was sent, false otherwise.
3230 static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv,
3231 struct batadv_tvlv_tt_data *tt_data,
3232 u8 *req_src, u8 *req_dst)
3234 struct batadv_orig_node *req_dst_orig_node;
3235 struct batadv_orig_node *res_dst_orig_node = NULL;
3236 struct batadv_tvlv_tt_change *tt_change;
3237 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3238 struct batadv_tvlv_tt_vlan_data *tt_vlan;
3239 bool ret = false, full_table;
3240 u8 orig_ttvn, req_ttvn;
3244 batadv_dbg(BATADV_DBG_TT, bat_priv,
3245 "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n",
3246 req_src, tt_data->ttvn, req_dst,
3247 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3249 /* Let's get the orig node of the REAL destination */
3250 req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst);
3251 if (!req_dst_orig_node)
3254 res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src);
3255 if (!res_dst_orig_node)
3258 orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn);
3259 req_ttvn = tt_data->ttvn;
3261 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
3262 /* this node doesn't have the requested data */
3263 if (orig_ttvn != req_ttvn ||
3264 !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan,
3265 ntohs(tt_data->num_vlan)))
3268 /* If the full table has been explicitly requested */
3269 if (tt_data->flags & BATADV_TT_FULL_TABLE ||
3270 !req_dst_orig_node->tt_buff)
3275 /* TT fragmentation hasn't been implemented yet, so send as many
3276 * TT entries fit a single packet as possible only
3279 spin_lock_bh(&req_dst_orig_node->tt_buff_lock);
3280 tt_len = req_dst_orig_node->tt_buff_len;
3282 tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
3289 /* Copy the last orig_node's OGM buffer */
3290 memcpy(tt_change, req_dst_orig_node->tt_buff,
3291 req_dst_orig_node->tt_buff_len);
3292 spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
3294 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3295 * in the initial part
3298 tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
3305 /* fill the rest of the tvlv with the real TT entries */
3306 batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash,
3308 batadv_tt_global_valid,
3312 /* Don't send the response, if larger than fragmented packet. */
3313 tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len;
3314 if (tt_len > atomic_read(&bat_priv->packet_size_max)) {
3315 net_ratelimited_function(batadv_info, bat_priv->soft_iface,
3316 "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n",
3317 res_dst_orig_node->orig);
3321 tvlv_tt_data->flags = BATADV_TT_RESPONSE;
3322 tvlv_tt_data->ttvn = req_ttvn;
3325 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3327 batadv_dbg(BATADV_DBG_TT, bat_priv,
3328 "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n",
3329 res_dst_orig_node->orig, req_dst_orig_node->orig,
3330 full_table ? 'F' : '.', req_ttvn);
3332 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
3334 batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig,
3335 req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
3342 spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
3345 if (res_dst_orig_node)
3346 batadv_orig_node_put(res_dst_orig_node);
3347 if (req_dst_orig_node)
3348 batadv_orig_node_put(req_dst_orig_node);
3349 kfree(tvlv_tt_data);
3354 * batadv_send_my_tt_response() - send reply to tt request concerning this
3355 * node's translation table
3356 * @bat_priv: the bat priv with all the soft interface information
3357 * @tt_data: tt data containing the tt request information
3358 * @req_src: mac address of tt request sender
3360 * Return: true if tt request reply was sent, false otherwise.
3362 static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv,
3363 struct batadv_tvlv_tt_data *tt_data,
3366 struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
3367 struct batadv_hard_iface *primary_if = NULL;
3368 struct batadv_tvlv_tt_change *tt_change;
3369 struct batadv_orig_node *orig_node;
3370 u8 my_ttvn, req_ttvn;
3375 batadv_dbg(BATADV_DBG_TT, bat_priv,
3376 "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
3377 req_src, tt_data->ttvn,
3378 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3380 spin_lock_bh(&bat_priv->tt.commit_lock);
3382 my_ttvn = (u8)atomic_read(&bat_priv->tt.vn);
3383 req_ttvn = tt_data->ttvn;
3385 orig_node = batadv_orig_hash_find(bat_priv, req_src);
3389 primary_if = batadv_primary_if_get_selected(bat_priv);
3393 /* If the full table has been explicitly requested or the gap
3394 * is too big send the whole local translation table
3396 if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn ||
3397 !bat_priv->tt.last_changeset)
3402 /* TT fragmentation hasn't been implemented yet, so send as many
3403 * TT entries fit a single packet as possible only
3406 spin_lock_bh(&bat_priv->tt.last_changeset_lock);
3408 tt_len = bat_priv->tt.last_changeset_len;
3409 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
3413 if (!tt_len || !tvlv_len)
3416 /* Copy the last orig_node's OGM buffer */
3417 memcpy(tt_change, bat_priv->tt.last_changeset,
3418 bat_priv->tt.last_changeset_len);
3419 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
3421 req_ttvn = (u8)atomic_read(&bat_priv->tt.vn);
3423 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3424 * in the initial part
3427 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
3431 if (!tt_len || !tvlv_len)
3434 /* fill the rest of the tvlv with the real TT entries */
3435 batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash,
3437 batadv_tt_local_valid, NULL);
3440 tvlv_tt_data->flags = BATADV_TT_RESPONSE;
3441 tvlv_tt_data->ttvn = req_ttvn;
3444 tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
3446 batadv_dbg(BATADV_DBG_TT, bat_priv,
3447 "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n",
3448 orig_node->orig, full_table ? 'F' : '.', req_ttvn);
3450 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
3452 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3453 req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
3459 spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
3461 spin_unlock_bh(&bat_priv->tt.commit_lock);
3463 batadv_orig_node_put(orig_node);
3465 batadv_hardif_put(primary_if);
3466 kfree(tvlv_tt_data);
3467 /* The packet was for this host, so it doesn't need to be re-routed */
3472 * batadv_send_tt_response() - send reply to tt request
3473 * @bat_priv: the bat priv with all the soft interface information
3474 * @tt_data: tt data containing the tt request information
3475 * @req_src: mac address of tt request sender
3476 * @req_dst: mac address of tt request recipient
3478 * Return: true if tt request reply was sent, false otherwise.
3480 static bool batadv_send_tt_response(struct batadv_priv *bat_priv,
3481 struct batadv_tvlv_tt_data *tt_data,
3482 u8 *req_src, u8 *req_dst)
3484 if (batadv_is_my_mac(bat_priv, req_dst))
3485 return batadv_send_my_tt_response(bat_priv, tt_data, req_src);
3486 return batadv_send_other_tt_response(bat_priv, tt_data, req_src,
3490 static void _batadv_tt_update_changes(struct batadv_priv *bat_priv,
3491 struct batadv_orig_node *orig_node,
3492 struct batadv_tvlv_tt_change *tt_change,
3493 u16 tt_num_changes, u8 ttvn)
3498 for (i = 0; i < tt_num_changes; i++) {
3499 if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) {
3500 roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM;
3501 batadv_tt_global_del(bat_priv, orig_node,
3502 (tt_change + i)->addr,
3503 ntohs((tt_change + i)->vid),
3504 "tt removed by changes",
3507 if (!batadv_tt_global_add(bat_priv, orig_node,
3508 (tt_change + i)->addr,
3509 ntohs((tt_change + i)->vid),
3510 (tt_change + i)->flags, ttvn))
3511 /* In case of problem while storing a
3512 * global_entry, we stop the updating
3513 * procedure without committing the
3514 * ttvn change. This will avoid to send
3515 * corrupted data on tt_request
3520 set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized);
3523 static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv,
3524 struct batadv_tvlv_tt_change *tt_change,
3525 u8 ttvn, u8 *resp_src,
3528 struct batadv_orig_node *orig_node;
3530 orig_node = batadv_orig_hash_find(bat_priv, resp_src);
3534 /* Purge the old table first.. */
3535 batadv_tt_global_del_orig(bat_priv, orig_node, -1,
3536 "Received full table");
3538 _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries,
3541 spin_lock_bh(&orig_node->tt_buff_lock);
3542 kfree(orig_node->tt_buff);
3543 orig_node->tt_buff_len = 0;
3544 orig_node->tt_buff = NULL;
3545 spin_unlock_bh(&orig_node->tt_buff_lock);
3547 atomic_set(&orig_node->last_ttvn, ttvn);
3551 batadv_orig_node_put(orig_node);
3554 static void batadv_tt_update_changes(struct batadv_priv *bat_priv,
3555 struct batadv_orig_node *orig_node,
3556 u16 tt_num_changes, u8 ttvn,
3557 struct batadv_tvlv_tt_change *tt_change)
3559 _batadv_tt_update_changes(bat_priv, orig_node, tt_change,
3560 tt_num_changes, ttvn);
3562 batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change,
3563 batadv_tt_len(tt_num_changes));
3564 atomic_set(&orig_node->last_ttvn, ttvn);
3568 * batadv_is_my_client() - check if a client is served by the local node
3569 * @bat_priv: the bat priv with all the soft interface information
3570 * @addr: the mac address of the client to check
3571 * @vid: VLAN identifier
3573 * Return: true if the client is served by this node, false otherwise.
3575 bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr,
3578 struct batadv_tt_local_entry *tt_local_entry;
3581 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
3582 if (!tt_local_entry)
3584 /* Check if the client has been logically deleted (but is kept for
3585 * consistency purpose)
3587 if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) ||
3588 (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM))
3593 batadv_tt_local_entry_put(tt_local_entry);
3598 * batadv_handle_tt_response() - process incoming tt reply
3599 * @bat_priv: the bat priv with all the soft interface information
3600 * @tt_data: tt data containing the tt request information
3601 * @resp_src: mac address of tt reply sender
3602 * @num_entries: number of tt change entries appended to the tt data
3604 static void batadv_handle_tt_response(struct batadv_priv *bat_priv,
3605 struct batadv_tvlv_tt_data *tt_data,
3606 u8 *resp_src, u16 num_entries)
3608 struct batadv_tt_req_node *node;
3609 struct hlist_node *safe;
3610 struct batadv_orig_node *orig_node = NULL;
3611 struct batadv_tvlv_tt_change *tt_change;
3612 u8 *tvlv_ptr = (u8 *)tt_data;
3615 batadv_dbg(BATADV_DBG_TT, bat_priv,
3616 "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
3617 resp_src, tt_data->ttvn, num_entries,
3618 ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.'));
3620 orig_node = batadv_orig_hash_find(bat_priv, resp_src);
3624 spin_lock_bh(&orig_node->tt_lock);
3626 change_offset = sizeof(struct batadv_tvlv_tt_vlan_data);
3627 change_offset *= ntohs(tt_data->num_vlan);
3628 change_offset += sizeof(*tt_data);
3629 tvlv_ptr += change_offset;
3631 tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr;
3632 if (tt_data->flags & BATADV_TT_FULL_TABLE) {
3633 batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn,
3634 resp_src, num_entries);
3636 batadv_tt_update_changes(bat_priv, orig_node, num_entries,
3637 tt_data->ttvn, tt_change);
3640 /* Recalculate the CRC for this orig_node and store it */
3641 batadv_tt_global_update_crc(bat_priv, orig_node);
3643 spin_unlock_bh(&orig_node->tt_lock);
3645 /* Delete the tt_req_node from pending tt_requests list */
3646 spin_lock_bh(&bat_priv->tt.req_list_lock);
3647 hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
3648 if (!batadv_compare_eth(node->addr, resp_src))
3650 hlist_del_init(&node->list);
3651 batadv_tt_req_node_put(node);
3654 spin_unlock_bh(&bat_priv->tt.req_list_lock);
3657 batadv_orig_node_put(orig_node);
3660 static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv)
3662 struct batadv_tt_roam_node *node, *safe;
3664 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3666 list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) {
3667 list_del(&node->list);
3668 kmem_cache_free(batadv_tt_roam_cache, node);
3671 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3674 static void batadv_tt_roam_purge(struct batadv_priv *bat_priv)
3676 struct batadv_tt_roam_node *node, *safe;
3678 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3679 list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) {
3680 if (!batadv_has_timed_out(node->first_time,
3681 BATADV_ROAMING_MAX_TIME))
3684 list_del(&node->list);
3685 kmem_cache_free(batadv_tt_roam_cache, node);
3687 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3691 * batadv_tt_check_roam_count() - check if a client has roamed too frequently
3692 * @bat_priv: the bat priv with all the soft interface information
3693 * @client: mac address of the roaming client
3695 * This function checks whether the client already reached the
3696 * maximum number of possible roaming phases. In this case the ROAMING_ADV
3699 * Return: true if the ROAMING_ADV can be sent, false otherwise
3701 static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client)
3703 struct batadv_tt_roam_node *tt_roam_node;
3706 spin_lock_bh(&bat_priv->tt.roam_list_lock);
3707 /* The new tt_req will be issued only if I'm not waiting for a
3708 * reply from the same orig_node yet
3710 list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) {
3711 if (!batadv_compare_eth(tt_roam_node->addr, client))
3714 if (batadv_has_timed_out(tt_roam_node->first_time,
3715 BATADV_ROAMING_MAX_TIME))
3718 if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter))
3719 /* Sorry, you roamed too many times! */
3726 tt_roam_node = kmem_cache_alloc(batadv_tt_roam_cache,
3731 tt_roam_node->first_time = jiffies;
3732 atomic_set(&tt_roam_node->counter,
3733 BATADV_ROAMING_MAX_COUNT - 1);
3734 ether_addr_copy(tt_roam_node->addr, client);
3736 list_add(&tt_roam_node->list, &bat_priv->tt.roam_list);
3741 spin_unlock_bh(&bat_priv->tt.roam_list_lock);
3746 * batadv_send_roam_adv() - send a roaming advertisement message
3747 * @bat_priv: the bat priv with all the soft interface information
3748 * @client: mac address of the roaming client
3749 * @vid: VLAN identifier
3750 * @orig_node: message destination
3752 * Send a ROAMING_ADV message to the node which was previously serving this
3753 * client. This is done to inform the node that from now on all traffic destined
3754 * for this particular roamed client has to be forwarded to the sender of the
3757 static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client,
3759 struct batadv_orig_node *orig_node)
3761 struct batadv_hard_iface *primary_if;
3762 struct batadv_tvlv_roam_adv tvlv_roam;
3764 primary_if = batadv_primary_if_get_selected(bat_priv);
3768 /* before going on we have to check whether the client has
3769 * already roamed to us too many times
3771 if (!batadv_tt_check_roam_count(bat_priv, client))
3774 batadv_dbg(BATADV_DBG_TT, bat_priv,
3775 "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n",
3776 orig_node->orig, client, batadv_print_vid(vid));
3778 batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX);
3780 memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client));
3781 tvlv_roam.vid = htons(vid);
3783 batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
3784 orig_node->orig, BATADV_TVLV_ROAM, 1,
3785 &tvlv_roam, sizeof(tvlv_roam));
3789 batadv_hardif_put(primary_if);
3792 static void batadv_tt_purge(struct work_struct *work)
3794 struct delayed_work *delayed_work;
3795 struct batadv_priv_tt *priv_tt;
3796 struct batadv_priv *bat_priv;
3798 delayed_work = to_delayed_work(work);
3799 priv_tt = container_of(delayed_work, struct batadv_priv_tt, work);
3800 bat_priv = container_of(priv_tt, struct batadv_priv, tt);
3802 batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT);
3803 batadv_tt_global_purge(bat_priv);
3804 batadv_tt_req_purge(bat_priv);
3805 batadv_tt_roam_purge(bat_priv);
3807 queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
3808 msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
3812 * batadv_tt_free() - Free translation table of soft interface
3813 * @bat_priv: the bat priv with all the soft interface information
3815 void batadv_tt_free(struct batadv_priv *bat_priv)
3817 batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1);
3818 batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1);
3820 cancel_delayed_work_sync(&bat_priv->tt.work);
3822 batadv_tt_local_table_free(bat_priv);
3823 batadv_tt_global_table_free(bat_priv);
3824 batadv_tt_req_list_free(bat_priv);
3825 batadv_tt_changes_list_free(bat_priv);
3826 batadv_tt_roam_list_free(bat_priv);
3828 kfree(bat_priv->tt.last_changeset);
3832 * batadv_tt_local_set_flags() - set or unset the specified flags on the local
3833 * table and possibly count them in the TT size
3834 * @bat_priv: the bat priv with all the soft interface information
3835 * @flags: the flag to switch
3836 * @enable: whether to set or unset the flag
3837 * @count: whether to increase the TT size by the number of changed entries
3839 static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags,
3840 bool enable, bool count)
3842 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
3843 struct batadv_tt_common_entry *tt_common_entry;
3844 struct hlist_head *head;
3850 for (i = 0; i < hash->size; i++) {
3851 head = &hash->table[i];
3854 hlist_for_each_entry_rcu(tt_common_entry,
3857 if ((tt_common_entry->flags & flags) == flags)
3859 tt_common_entry->flags |= flags;
3861 if (!(tt_common_entry->flags & flags))
3863 tt_common_entry->flags &= ~flags;
3869 batadv_tt_local_size_inc(bat_priv,
3870 tt_common_entry->vid);
3876 /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */
3877 static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv)
3879 struct batadv_hashtable *hash = bat_priv->tt.local_hash;
3880 struct batadv_tt_common_entry *tt_common;
3881 struct batadv_tt_local_entry *tt_local;
3882 struct hlist_node *node_tmp;
3883 struct hlist_head *head;
3884 spinlock_t *list_lock; /* protects write access to the hash lists */
3890 for (i = 0; i < hash->size; i++) {
3891 head = &hash->table[i];
3892 list_lock = &hash->list_locks[i];
3894 spin_lock_bh(list_lock);
3895 hlist_for_each_entry_safe(tt_common, node_tmp, head,
3897 if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING))
3900 batadv_dbg(BATADV_DBG_TT, bat_priv,
3901 "Deleting local tt entry (%pM, vid: %d): pending\n",
3903 batadv_print_vid(tt_common->vid));
3905 batadv_tt_local_size_dec(bat_priv, tt_common->vid);
3906 hlist_del_rcu(&tt_common->hash_entry);
3907 tt_local = container_of(tt_common,
3908 struct batadv_tt_local_entry,
3911 batadv_tt_local_entry_put(tt_local);
3913 spin_unlock_bh(list_lock);
3918 * batadv_tt_local_commit_changes_nolock() - commit all pending local tt changes
3919 * which have been queued in the time since the last commit
3920 * @bat_priv: the bat priv with all the soft interface information
3922 * Caller must hold tt->commit_lock.
3924 static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv)
3926 lockdep_assert_held(&bat_priv->tt.commit_lock);
3928 if (atomic_read(&bat_priv->tt.local_changes) < 1) {
3929 if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt))
3930 batadv_tt_tvlv_container_update(bat_priv);
3934 batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true);
3936 batadv_tt_local_purge_pending_clients(bat_priv);
3937 batadv_tt_local_update_crc(bat_priv);
3939 /* Increment the TTVN only once per OGM interval */
3940 atomic_inc(&bat_priv->tt.vn);
3941 batadv_dbg(BATADV_DBG_TT, bat_priv,
3942 "Local changes committed, updating to ttvn %u\n",
3943 (u8)atomic_read(&bat_priv->tt.vn));
3945 /* reset the sending counter */
3946 atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX);
3947 batadv_tt_tvlv_container_update(bat_priv);
3951 * batadv_tt_local_commit_changes() - commit all pending local tt changes which
3952 * have been queued in the time since the last commit
3953 * @bat_priv: the bat priv with all the soft interface information
3955 void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv)
3957 spin_lock_bh(&bat_priv->tt.commit_lock);
3958 batadv_tt_local_commit_changes_nolock(bat_priv);
3959 spin_unlock_bh(&bat_priv->tt.commit_lock);
3963 * batadv_is_ap_isolated() - Check if packet from upper layer should be dropped
3964 * @bat_priv: the bat priv with all the soft interface information
3965 * @src: source mac address of packet
3966 * @dst: destination mac address of packet
3967 * @vid: vlan id of packet
3969 * Return: true when src+dst(+vid) pair should be isolated, false otherwise
3971 bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst,
3974 struct batadv_tt_local_entry *tt_local_entry;
3975 struct batadv_tt_global_entry *tt_global_entry;
3976 struct batadv_softif_vlan *vlan;
3979 vlan = batadv_softif_vlan_get(bat_priv, vid);
3983 if (!atomic_read(&vlan->ap_isolation))
3986 tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid);
3987 if (!tt_local_entry)
3990 tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid);
3991 if (!tt_global_entry)
3992 goto local_entry_put;
3994 if (_batadv_is_ap_isolated(tt_local_entry, tt_global_entry))
3997 batadv_tt_global_entry_put(tt_global_entry);
3999 batadv_tt_local_entry_put(tt_local_entry);
4001 batadv_softif_vlan_put(vlan);
4006 * batadv_tt_update_orig() - update global translation table with new tt
4007 * information received via ogms
4008 * @bat_priv: the bat priv with all the soft interface information
4009 * @orig_node: the orig_node of the ogm
4010 * @tt_buff: pointer to the first tvlv VLAN entry
4011 * @tt_num_vlan: number of tvlv VLAN entries
4012 * @tt_change: pointer to the first entry in the TT buffer
4013 * @tt_num_changes: number of tt changes inside the tt buffer
4014 * @ttvn: translation table version number of this changeset
4016 static void batadv_tt_update_orig(struct batadv_priv *bat_priv,
4017 struct batadv_orig_node *orig_node,
4018 const void *tt_buff, u16 tt_num_vlan,
4019 struct batadv_tvlv_tt_change *tt_change,
4020 u16 tt_num_changes, u8 ttvn)
4022 u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn);
4023 struct batadv_tvlv_tt_vlan_data *tt_vlan;
4024 bool full_table = true;
4027 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff;
4028 has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT,
4029 &orig_node->capa_initialized);
4031 /* orig table not initialised AND first diff is in the OGM OR the ttvn
4032 * increased by one -> we can apply the attached changes
4034 if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) {
4035 /* the OGM could not contain the changes due to their size or
4036 * because they have already been sent BATADV_TT_OGM_APPEND_MAX
4038 * In this case send a tt request
4040 if (!tt_num_changes) {
4045 spin_lock_bh(&orig_node->tt_lock);
4047 batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes,
4050 /* Even if we received the precomputed crc with the OGM, we
4051 * prefer to recompute it to spot any possible inconsistency
4052 * in the global table
4054 batadv_tt_global_update_crc(bat_priv, orig_node);
4056 spin_unlock_bh(&orig_node->tt_lock);
4058 /* The ttvn alone is not enough to guarantee consistency
4059 * because a single value could represent different states
4060 * (due to the wrap around). Thus a node has to check whether
4061 * the resulting table (after applying the changes) is still
4062 * consistent or not. E.g. a node could disconnect while its
4063 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
4064 * checking the CRC value is mandatory to detect the
4067 if (!batadv_tt_global_check_crc(orig_node, tt_vlan,
4071 /* if we missed more than one change or our tables are not
4072 * in sync anymore -> request fresh tt data
4074 if (!has_tt_init || ttvn != orig_ttvn ||
4075 !batadv_tt_global_check_crc(orig_node, tt_vlan,
4078 batadv_dbg(BATADV_DBG_TT, bat_priv,
4079 "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n",
4080 orig_node->orig, ttvn, orig_ttvn,
4082 batadv_send_tt_request(bat_priv, orig_node, ttvn,
4083 tt_vlan, tt_num_vlan,
4091 * batadv_tt_global_client_is_roaming() - check if a client is marked as roaming
4092 * @bat_priv: the bat priv with all the soft interface information
4093 * @addr: the mac address of the client to check
4094 * @vid: VLAN identifier
4096 * Return: true if we know that the client has moved from its old originator
4097 * to another one. This entry is still kept for consistency purposes and will be
4098 * deleted later by a DEL or because of timeout
4100 bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv,
4101 u8 *addr, unsigned short vid)
4103 struct batadv_tt_global_entry *tt_global_entry;
4106 tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
4107 if (!tt_global_entry)
4110 ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM;
4111 batadv_tt_global_entry_put(tt_global_entry);
4117 * batadv_tt_local_client_is_roaming() - tells whether the client is roaming
4118 * @bat_priv: the bat priv with all the soft interface information
4119 * @addr: the mac address of the local client to query
4120 * @vid: VLAN identifier
4122 * Return: true if the local client is known to be roaming (it is not served by
4123 * this node anymore) or not. If yes, the client is still present in the table
4124 * to keep the latter consistent with the node TTVN
4126 bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv,
4127 u8 *addr, unsigned short vid)
4129 struct batadv_tt_local_entry *tt_local_entry;
4132 tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
4133 if (!tt_local_entry)
4136 ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM;
4137 batadv_tt_local_entry_put(tt_local_entry);
4143 * batadv_tt_add_temporary_global_entry() - Add temporary entry to global TT
4144 * @bat_priv: the bat priv with all the soft interface information
4145 * @orig_node: orig node which the temporary entry should be associated with
4146 * @addr: mac address of the client
4147 * @vid: VLAN id of the new temporary global translation table
4149 * Return: true when temporary tt entry could be added, false otherwise
4151 bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv,
4152 struct batadv_orig_node *orig_node,
4153 const unsigned char *addr,
4156 /* ignore loop detect macs, they are not supposed to be in the tt local
4159 if (batadv_bla_is_loopdetect_mac(addr))
4162 if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid,
4163 BATADV_TT_CLIENT_TEMP,
4164 atomic_read(&orig_node->last_ttvn)))
4167 batadv_dbg(BATADV_DBG_TT, bat_priv,
4168 "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n",
4169 addr, batadv_print_vid(vid), orig_node->orig);
4175 * batadv_tt_local_resize_to_mtu() - resize the local translation table fit the
4176 * maximum packet size that can be transported through the mesh
4177 * @soft_iface: netdev struct of the mesh interface
4179 * Remove entries older than 'timeout' and half timeout if more entries need
4182 void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface)
4184 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
4185 int packet_size_max = atomic_read(&bat_priv->packet_size_max);
4186 int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2;
4187 bool reduced = false;
4189 spin_lock_bh(&bat_priv->tt.commit_lock);
4192 table_size = batadv_tt_local_table_transmit_size(bat_priv);
4193 if (packet_size_max >= table_size)
4196 batadv_tt_local_purge(bat_priv, timeout);
4197 batadv_tt_local_purge_pending_clients(bat_priv);
4201 net_ratelimited_function(batadv_info, soft_iface,
4202 "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n",
4206 /* commit these changes immediately, to avoid synchronization problem
4210 batadv_tt_local_commit_changes_nolock(bat_priv);
4212 spin_unlock_bh(&bat_priv->tt.commit_lock);
4216 * batadv_tt_tvlv_ogm_handler_v1() - process incoming tt tvlv container
4217 * @bat_priv: the bat priv with all the soft interface information
4218 * @orig: the orig_node of the ogm
4219 * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
4220 * @tvlv_value: tvlv buffer containing the gateway data
4221 * @tvlv_value_len: tvlv buffer length
4223 static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,
4224 struct batadv_orig_node *orig,
4225 u8 flags, void *tvlv_value,
4228 struct batadv_tvlv_tt_vlan_data *tt_vlan;
4229 struct batadv_tvlv_tt_change *tt_change;
4230 struct batadv_tvlv_tt_data *tt_data;
4231 u16 num_entries, num_vlan;
4233 if (tvlv_value_len < sizeof(*tt_data))
4236 tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
4237 tvlv_value_len -= sizeof(*tt_data);
4239 num_vlan = ntohs(tt_data->num_vlan);
4241 if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan)
4244 tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
4245 tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan);
4246 tvlv_value_len -= sizeof(*tt_vlan) * num_vlan;
4248 num_entries = batadv_tt_entries(tvlv_value_len);
4250 batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change,
4251 num_entries, tt_data->ttvn);
4255 * batadv_tt_tvlv_unicast_handler_v1() - process incoming (unicast) tt tvlv
4257 * @bat_priv: the bat priv with all the soft interface information
4258 * @src: mac address of tt tvlv sender
4259 * @dst: mac address of tt tvlv recipient
4260 * @tvlv_value: tvlv buffer containing the tt data
4261 * @tvlv_value_len: tvlv buffer length
4263 * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS
4266 static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
4271 struct batadv_tvlv_tt_data *tt_data;
4272 u16 tt_vlan_len, tt_num_entries;
4276 if (tvlv_value_len < sizeof(*tt_data))
4277 return NET_RX_SUCCESS;
4279 tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
4280 tvlv_value_len -= sizeof(*tt_data);
4282 tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data);
4283 tt_vlan_len *= ntohs(tt_data->num_vlan);
4285 if (tvlv_value_len < tt_vlan_len)
4286 return NET_RX_SUCCESS;
4288 tvlv_value_len -= tt_vlan_len;
4289 tt_num_entries = batadv_tt_entries(tvlv_value_len);
4291 switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) {
4292 case BATADV_TT_REQUEST:
4293 batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX);
4295 /* If this node cannot provide a TT response the tt_request is
4298 ret = batadv_send_tt_response(bat_priv, tt_data, src, dst);
4300 if (tt_data->flags & BATADV_TT_FULL_TABLE)
4305 batadv_dbg(BATADV_DBG_TT, bat_priv,
4306 "Routing TT_REQUEST to %pM [%c]\n",
4308 /* tvlv API will re-route the packet */
4312 case BATADV_TT_RESPONSE:
4313 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX);
4315 if (batadv_is_my_mac(bat_priv, dst)) {
4316 batadv_handle_tt_response(bat_priv, tt_data,
4317 src, tt_num_entries);
4318 return NET_RX_SUCCESS;
4321 if (tt_data->flags & BATADV_TT_FULL_TABLE)
4326 batadv_dbg(BATADV_DBG_TT, bat_priv,
4327 "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag);
4329 /* tvlv API will re-route the packet */
4333 return NET_RX_SUCCESS;
4337 * batadv_roam_tvlv_unicast_handler_v1() - process incoming tt roam tvlv
4339 * @bat_priv: the bat priv with all the soft interface information
4340 * @src: mac address of tt tvlv sender
4341 * @dst: mac address of tt tvlv recipient
4342 * @tvlv_value: tvlv buffer containing the tt data
4343 * @tvlv_value_len: tvlv buffer length
4345 * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS
4348 static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
4353 struct batadv_tvlv_roam_adv *roaming_adv;
4354 struct batadv_orig_node *orig_node = NULL;
4356 /* If this node is not the intended recipient of the
4357 * roaming advertisement the packet is forwarded
4358 * (the tvlv API will re-route the packet).
4360 if (!batadv_is_my_mac(bat_priv, dst))
4363 if (tvlv_value_len < sizeof(*roaming_adv))
4366 orig_node = batadv_orig_hash_find(bat_priv, src);
4370 batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX);
4371 roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value;
4373 batadv_dbg(BATADV_DBG_TT, bat_priv,
4374 "Received ROAMING_ADV from %pM (client %pM)\n",
4375 src, roaming_adv->client);
4377 batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client,
4378 ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM,
4379 atomic_read(&orig_node->last_ttvn) + 1);
4383 batadv_orig_node_put(orig_node);
4384 return NET_RX_SUCCESS;
4388 * batadv_tt_init() - initialise the translation table internals
4389 * @bat_priv: the bat priv with all the soft interface information
4391 * Return: 0 on success or negative error number in case of failure.
4393 int batadv_tt_init(struct batadv_priv *bat_priv)
4397 /* synchronized flags must be remote */
4398 BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK));
4400 ret = batadv_tt_local_init(bat_priv);
4404 ret = batadv_tt_global_init(bat_priv);
4408 batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1,
4409 batadv_tt_tvlv_unicast_handler_v1,
4410 BATADV_TVLV_TT, 1, BATADV_NO_FLAGS);
4412 batadv_tvlv_handler_register(bat_priv, NULL,
4413 batadv_roam_tvlv_unicast_handler_v1,
4414 BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS);
4416 INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge);
4417 queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
4418 msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
4424 * batadv_tt_global_is_isolated() - check if a client is marked as isolated
4425 * @bat_priv: the bat priv with all the soft interface information
4426 * @addr: the mac address of the client
4427 * @vid: the identifier of the VLAN where this client is connected
4429 * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false
4432 bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv,
4433 const u8 *addr, unsigned short vid)
4435 struct batadv_tt_global_entry *tt;
4438 tt = batadv_tt_global_hash_find(bat_priv, addr, vid);
4442 ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA;
4444 batadv_tt_global_entry_put(tt);
4450 * batadv_tt_cache_init() - Initialize tt memory object cache
4452 * Return: 0 on success or negative error number in case of failure.
4454 int __init batadv_tt_cache_init(void)
4456 size_t tl_size = sizeof(struct batadv_tt_local_entry);
4457 size_t tg_size = sizeof(struct batadv_tt_global_entry);
4458 size_t tt_orig_size = sizeof(struct batadv_tt_orig_list_entry);
4459 size_t tt_change_size = sizeof(struct batadv_tt_change_node);
4460 size_t tt_req_size = sizeof(struct batadv_tt_req_node);
4461 size_t tt_roam_size = sizeof(struct batadv_tt_roam_node);
4463 batadv_tl_cache = kmem_cache_create("batadv_tl_cache", tl_size, 0,
4464 SLAB_HWCACHE_ALIGN, NULL);
4465 if (!batadv_tl_cache)
4468 batadv_tg_cache = kmem_cache_create("batadv_tg_cache", tg_size, 0,
4469 SLAB_HWCACHE_ALIGN, NULL);
4470 if (!batadv_tg_cache)
4471 goto err_tt_tl_destroy;
4473 batadv_tt_orig_cache = kmem_cache_create("batadv_tt_orig_cache",
4475 SLAB_HWCACHE_ALIGN, NULL);
4476 if (!batadv_tt_orig_cache)
4477 goto err_tt_tg_destroy;
4479 batadv_tt_change_cache = kmem_cache_create("batadv_tt_change_cache",
4481 SLAB_HWCACHE_ALIGN, NULL);
4482 if (!batadv_tt_change_cache)
4483 goto err_tt_orig_destroy;
4485 batadv_tt_req_cache = kmem_cache_create("batadv_tt_req_cache",
4487 SLAB_HWCACHE_ALIGN, NULL);
4488 if (!batadv_tt_req_cache)
4489 goto err_tt_change_destroy;
4491 batadv_tt_roam_cache = kmem_cache_create("batadv_tt_roam_cache",
4493 SLAB_HWCACHE_ALIGN, NULL);
4494 if (!batadv_tt_roam_cache)
4495 goto err_tt_req_destroy;
4500 kmem_cache_destroy(batadv_tt_req_cache);
4501 batadv_tt_req_cache = NULL;
4502 err_tt_change_destroy:
4503 kmem_cache_destroy(batadv_tt_change_cache);
4504 batadv_tt_change_cache = NULL;
4505 err_tt_orig_destroy:
4506 kmem_cache_destroy(batadv_tt_orig_cache);
4507 batadv_tt_orig_cache = NULL;
4509 kmem_cache_destroy(batadv_tg_cache);
4510 batadv_tg_cache = NULL;
4512 kmem_cache_destroy(batadv_tl_cache);
4513 batadv_tl_cache = NULL;
4519 * batadv_tt_cache_destroy() - Destroy tt memory object cache
4521 void batadv_tt_cache_destroy(void)
4523 kmem_cache_destroy(batadv_tl_cache);
4524 kmem_cache_destroy(batadv_tg_cache);
4525 kmem_cache_destroy(batadv_tt_orig_cache);
4526 kmem_cache_destroy(batadv_tt_change_cache);
4527 kmem_cache_destroy(batadv_tt_req_cache);
4528 kmem_cache_destroy(batadv_tt_roam_cache);