1 /* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich, Antonio Quartulli
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 #include "translation-table.h"
20 #include "soft-interface.h"
21 #include "hard-interface.h"
24 #include "originator.h"
26 #include "bridge_loop_avoidance.h"
28 #include <linux/crc32c.h>
31 static struct lock_class_key batadv_tt_local_hash_lock_class_key
;
32 static struct lock_class_key batadv_tt_global_hash_lock_class_key
;
34 static void batadv_send_roam_adv(struct batadv_priv
*bat_priv
, uint8_t *client
,
36 struct batadv_orig_node
*orig_node
);
37 static void batadv_tt_purge(struct work_struct
*work
);
39 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry
*tt_global_entry
);
40 static void batadv_tt_global_del(struct batadv_priv
*bat_priv
,
41 struct batadv_orig_node
*orig_node
,
42 const unsigned char *addr
,
43 unsigned short vid
, const char *message
,
46 /* returns 1 if they are the same mac addr */
47 static int batadv_compare_tt(const struct hlist_node
*node
, const void *data2
)
49 const void *data1
= container_of(node
, struct batadv_tt_common_entry
,
52 return batadv_compare_eth(data1
, data2
);
56 * batadv_choose_tt - return the index of the tt entry in the hash table
57 * @data: pointer to the tt_common_entry object to map
58 * @size: the size of the hash table
60 * Returns the hash index where the object represented by 'data' should be
63 static inline uint32_t batadv_choose_tt(const void *data
, uint32_t size
)
65 struct batadv_tt_common_entry
*tt
;
68 tt
= (struct batadv_tt_common_entry
*)data
;
69 hash
= batadv_hash_bytes(hash
, &tt
->addr
, ETH_ALEN
);
70 hash
= batadv_hash_bytes(hash
, &tt
->vid
, sizeof(tt
->vid
));
80 * batadv_tt_hash_find - look for a client in the given hash table
81 * @hash: the hash table to search
82 * @addr: the mac address of the client to look for
83 * @vid: VLAN identifier
85 * Returns a pointer to the tt_common struct belonging to the searched client if
86 * found, NULL otherwise.
88 static struct batadv_tt_common_entry
*
89 batadv_tt_hash_find(struct batadv_hashtable
*hash
, const uint8_t *addr
,
92 struct hlist_head
*head
;
93 struct batadv_tt_common_entry to_search
, *tt
, *tt_tmp
= NULL
;
99 memcpy(to_search
.addr
, addr
, ETH_ALEN
);
102 index
= batadv_choose_tt(&to_search
, hash
->size
);
103 head
= &hash
->table
[index
];
106 hlist_for_each_entry_rcu(tt
, head
, hash_entry
) {
107 if (!batadv_compare_eth(tt
, addr
))
113 if (!atomic_inc_not_zero(&tt
->refcount
))
125 * batadv_tt_local_hash_find - search the local table for a given client
126 * @bat_priv: the bat priv with all the soft interface information
127 * @addr: the mac address of the client to look for
128 * @vid: VLAN identifier
130 * Returns a pointer to the corresponding tt_local_entry struct if the client is
131 * found, NULL otherwise.
133 static struct batadv_tt_local_entry
*
134 batadv_tt_local_hash_find(struct batadv_priv
*bat_priv
, const uint8_t *addr
,
137 struct batadv_tt_common_entry
*tt_common_entry
;
138 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
140 tt_common_entry
= batadv_tt_hash_find(bat_priv
->tt
.local_hash
, addr
,
143 tt_local_entry
= container_of(tt_common_entry
,
144 struct batadv_tt_local_entry
,
146 return tt_local_entry
;
150 * batadv_tt_global_hash_find - search the global table for a given client
151 * @bat_priv: the bat priv with all the soft interface information
152 * @addr: the mac address of the client to look for
153 * @vid: VLAN identifier
155 * Returns a pointer to the corresponding tt_global_entry struct if the client
156 * is found, NULL otherwise.
158 static struct batadv_tt_global_entry
*
159 batadv_tt_global_hash_find(struct batadv_priv
*bat_priv
, const uint8_t *addr
,
162 struct batadv_tt_common_entry
*tt_common_entry
;
163 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
165 tt_common_entry
= batadv_tt_hash_find(bat_priv
->tt
.global_hash
, addr
,
168 tt_global_entry
= container_of(tt_common_entry
,
169 struct batadv_tt_global_entry
,
171 return tt_global_entry
;
175 batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry
*tt_local_entry
)
177 if (atomic_dec_and_test(&tt_local_entry
->common
.refcount
))
178 kfree_rcu(tt_local_entry
, common
.rcu
);
182 * batadv_tt_global_entry_free_ref - decrement the refcounter for a
183 * tt_global_entry and possibly free it
184 * @tt_global_entry: the object to free
187 batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry
*tt_global_entry
)
189 if (atomic_dec_and_test(&tt_global_entry
->common
.refcount
)) {
190 batadv_tt_global_del_orig_list(tt_global_entry
);
191 kfree_rcu(tt_global_entry
, common
.rcu
);
195 static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head
*rcu
)
197 struct batadv_tt_orig_list_entry
*orig_entry
;
199 orig_entry
= container_of(rcu
, struct batadv_tt_orig_list_entry
, rcu
);
201 /* We are in an rcu callback here, therefore we cannot use
202 * batadv_orig_node_free_ref() and its call_rcu():
203 * An rcu_barrier() wouldn't wait for that to finish
205 batadv_orig_node_free_ref_now(orig_entry
->orig_node
);
210 * batadv_tt_local_size_mod - change the size by v of the local table identified
212 * @bat_priv: the bat priv with all the soft interface information
213 * @vid: the VLAN identifier of the sub-table to change
214 * @v: the amount to sum to the local table size
216 static void batadv_tt_local_size_mod(struct batadv_priv
*bat_priv
,
217 unsigned short vid
, int v
)
219 struct batadv_softif_vlan
*vlan
;
221 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
225 atomic_add(v
, &vlan
->tt
.num_entries
);
227 batadv_softif_vlan_free_ref(vlan
);
231 * batadv_tt_local_size_inc - increase by one the local table size for the given
233 * @bat_priv: the bat priv with all the soft interface information
234 * @vid: the VLAN identifier
236 static void batadv_tt_local_size_inc(struct batadv_priv
*bat_priv
,
239 batadv_tt_local_size_mod(bat_priv
, vid
, 1);
243 * batadv_tt_local_size_dec - decrease by one the local table size for the given
245 * @bat_priv: the bat priv with all the soft interface information
246 * @vid: the VLAN identifier
248 static void batadv_tt_local_size_dec(struct batadv_priv
*bat_priv
,
251 batadv_tt_local_size_mod(bat_priv
, vid
, -1);
255 * batadv_tt_global_size_mod - change the size by v of the local table
257 * @bat_priv: the bat priv with all the soft interface information
258 * @vid: the VLAN identifier
259 * @v: the amount to sum to the global table size
261 static void batadv_tt_global_size_mod(struct batadv_orig_node
*orig_node
,
262 unsigned short vid
, int v
)
264 struct batadv_orig_node_vlan
*vlan
;
266 vlan
= batadv_orig_node_vlan_new(orig_node
, vid
);
270 if (atomic_add_return(v
, &vlan
->tt
.num_entries
) == 0) {
271 spin_lock_bh(&orig_node
->vlan_list_lock
);
272 list_del_rcu(&vlan
->list
);
273 spin_unlock_bh(&orig_node
->vlan_list_lock
);
274 batadv_orig_node_vlan_free_ref(vlan
);
277 batadv_orig_node_vlan_free_ref(vlan
);
281 * batadv_tt_global_size_inc - increase by one the global table size for the
283 * @orig_node: the originator which global table size has to be decreased
284 * @vid: the vlan identifier
286 static void batadv_tt_global_size_inc(struct batadv_orig_node
*orig_node
,
289 batadv_tt_global_size_mod(orig_node
, vid
, 1);
293 * batadv_tt_global_size_dec - decrease by one the global table size for the
295 * @orig_node: the originator which global table size has to be decreased
296 * @vid: the vlan identifier
298 static void batadv_tt_global_size_dec(struct batadv_orig_node
*orig_node
,
301 batadv_tt_global_size_mod(orig_node
, vid
, -1);
305 batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry
*orig_entry
)
307 if (!atomic_dec_and_test(&orig_entry
->refcount
))
310 call_rcu(&orig_entry
->rcu
, batadv_tt_orig_list_entry_free_rcu
);
314 * batadv_tt_local_event - store a local TT event (ADD/DEL)
315 * @bat_priv: the bat priv with all the soft interface information
316 * @tt_local_entry: the TT entry involved in the event
317 * @event_flags: flags to store in the event structure
319 static void batadv_tt_local_event(struct batadv_priv
*bat_priv
,
320 struct batadv_tt_local_entry
*tt_local_entry
,
323 struct batadv_tt_change_node
*tt_change_node
, *entry
, *safe
;
324 struct batadv_tt_common_entry
*common
= &tt_local_entry
->common
;
325 uint8_t flags
= common
->flags
| event_flags
;
326 bool event_removed
= false;
327 bool del_op_requested
, del_op_entry
;
329 tt_change_node
= kmalloc(sizeof(*tt_change_node
), GFP_ATOMIC
);
333 tt_change_node
->change
.flags
= flags
;
334 memset(tt_change_node
->change
.reserved
, 0,
335 sizeof(tt_change_node
->change
.reserved
));
336 memcpy(tt_change_node
->change
.addr
, common
->addr
, ETH_ALEN
);
337 tt_change_node
->change
.vid
= htons(common
->vid
);
339 del_op_requested
= flags
& BATADV_TT_CLIENT_DEL
;
341 /* check for ADD+DEL or DEL+ADD events */
342 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
343 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
345 if (!batadv_compare_eth(entry
->change
.addr
, common
->addr
))
348 /* DEL+ADD in the same orig interval have no effect and can be
349 * removed to avoid silly behaviour on the receiver side. The
350 * other way around (ADD+DEL) can happen in case of roaming of
351 * a client still in the NEW state. Roaming of NEW clients is
352 * now possible due to automatically recognition of "temporary"
355 del_op_entry
= entry
->change
.flags
& BATADV_TT_CLIENT_DEL
;
356 if (!del_op_requested
&& del_op_entry
)
358 if (del_op_requested
&& !del_op_entry
)
361 /* this is a second add in the same originator interval. It
362 * means that flags have been changed: update them!
364 if (!del_op_requested
&& !del_op_entry
)
365 entry
->change
.flags
= flags
;
369 list_del(&entry
->list
);
371 kfree(tt_change_node
);
372 event_removed
= true;
376 /* track the change in the OGMinterval list */
377 list_add_tail(&tt_change_node
->list
, &bat_priv
->tt
.changes_list
);
380 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
383 atomic_dec(&bat_priv
->tt
.local_changes
);
385 atomic_inc(&bat_priv
->tt
.local_changes
);
389 * batadv_tt_len - compute length in bytes of given number of tt changes
390 * @changes_num: number of tt changes
392 * Returns computed length in bytes.
394 static int batadv_tt_len(int changes_num
)
396 return changes_num
* sizeof(struct batadv_tvlv_tt_change
);
400 * batadv_tt_entries - compute the number of entries fitting in tt_len bytes
401 * @tt_len: available space
403 * Returns the number of entries.
405 static uint16_t batadv_tt_entries(uint16_t tt_len
)
407 return tt_len
/ batadv_tt_len(1);
411 * batadv_tt_local_table_transmit_size - calculates the local translation table
412 * size when transmitted over the air
413 * @bat_priv: the bat priv with all the soft interface information
415 * Returns local translation table size in bytes.
417 static int batadv_tt_local_table_transmit_size(struct batadv_priv
*bat_priv
)
419 uint16_t num_vlan
= 0, tt_local_entries
= 0;
420 struct batadv_softif_vlan
*vlan
;
424 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
426 tt_local_entries
+= atomic_read(&vlan
->tt
.num_entries
);
430 /* header size of tvlv encapsulated tt response payload */
431 hdr_size
= sizeof(struct batadv_unicast_tvlv_packet
);
432 hdr_size
+= sizeof(struct batadv_tvlv_hdr
);
433 hdr_size
+= sizeof(struct batadv_tvlv_tt_data
);
434 hdr_size
+= num_vlan
* sizeof(struct batadv_tvlv_tt_vlan_data
);
436 return hdr_size
+ batadv_tt_len(tt_local_entries
);
439 static int batadv_tt_local_init(struct batadv_priv
*bat_priv
)
441 if (bat_priv
->tt
.local_hash
)
444 bat_priv
->tt
.local_hash
= batadv_hash_new(1024);
446 if (!bat_priv
->tt
.local_hash
)
449 batadv_hash_set_lock_class(bat_priv
->tt
.local_hash
,
450 &batadv_tt_local_hash_lock_class_key
);
455 static void batadv_tt_global_free(struct batadv_priv
*bat_priv
,
456 struct batadv_tt_global_entry
*tt_global
,
459 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
460 "Deleting global tt entry %pM (vid: %d): %s\n",
461 tt_global
->common
.addr
,
462 BATADV_PRINT_VID(tt_global
->common
.vid
), message
);
464 batadv_hash_remove(bat_priv
->tt
.global_hash
, batadv_compare_tt
,
465 batadv_choose_tt
, &tt_global
->common
);
466 batadv_tt_global_entry_free_ref(tt_global
);
470 * batadv_tt_local_add - add a new client to the local table or update an
472 * @soft_iface: netdev struct of the mesh interface
473 * @addr: the mac address of the client to add
474 * @vid: VLAN identifier
475 * @ifindex: index of the interface where the client is connected to (useful to
476 * identify wireless clients)
477 * @mark: the value contained in the skb->mark field of the received packet (if
480 * Returns true if the client was successfully added, false otherwise.
482 bool batadv_tt_local_add(struct net_device
*soft_iface
, const uint8_t *addr
,
483 unsigned short vid
, int ifindex
, uint32_t mark
)
485 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
486 struct batadv_tt_local_entry
*tt_local
;
487 struct batadv_tt_global_entry
*tt_global
;
488 struct net_device
*in_dev
= NULL
;
489 struct hlist_head
*head
;
490 struct batadv_tt_orig_list_entry
*orig_entry
;
491 int hash_added
, table_size
, packet_size_max
;
492 bool ret
= false, roamed_back
= false;
493 uint8_t remote_flags
;
496 if (ifindex
!= BATADV_NULL_IFINDEX
)
497 in_dev
= dev_get_by_index(&init_net
, ifindex
);
499 tt_local
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
500 tt_global
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
503 tt_local
->last_seen
= jiffies
;
504 if (tt_local
->common
.flags
& BATADV_TT_CLIENT_PENDING
) {
505 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
506 "Re-adding pending client %pM (vid: %d)\n",
507 addr
, BATADV_PRINT_VID(vid
));
508 /* whatever the reason why the PENDING flag was set,
509 * this is a client which was enqueued to be removed in
510 * this orig_interval. Since it popped up again, the
511 * flag can be reset like it was never enqueued
513 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_PENDING
;
517 if (tt_local
->common
.flags
& BATADV_TT_CLIENT_ROAM
) {
518 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
519 "Roaming client %pM (vid: %d) came back to its original location\n",
520 addr
, BATADV_PRINT_VID(vid
));
521 /* the ROAM flag is set because this client roamed away
522 * and the node got a roaming_advertisement message. Now
523 * that the client popped up again at its original
524 * location such flag can be unset
526 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_ROAM
;
532 /* Ignore the client if we cannot send it in a full table response. */
533 table_size
= batadv_tt_local_table_transmit_size(bat_priv
);
534 table_size
+= batadv_tt_len(1);
535 packet_size_max
= atomic_read(&bat_priv
->packet_size_max
);
536 if (table_size
> packet_size_max
) {
537 net_ratelimited_function(batadv_info
, soft_iface
,
538 "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n",
539 table_size
, packet_size_max
, addr
);
543 tt_local
= kmalloc(sizeof(*tt_local
), GFP_ATOMIC
);
547 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
548 "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n",
549 addr
, BATADV_PRINT_VID(vid
),
550 (uint8_t)atomic_read(&bat_priv
->tt
.vn
));
552 memcpy(tt_local
->common
.addr
, addr
, ETH_ALEN
);
553 /* The local entry has to be marked as NEW to avoid to send it in
554 * a full table response going out before the next ttvn increment
555 * (consistency check)
557 tt_local
->common
.flags
= BATADV_TT_CLIENT_NEW
;
558 tt_local
->common
.vid
= vid
;
559 if (batadv_is_wifi_netdev(in_dev
))
560 tt_local
->common
.flags
|= BATADV_TT_CLIENT_WIFI
;
561 atomic_set(&tt_local
->common
.refcount
, 2);
562 tt_local
->last_seen
= jiffies
;
563 tt_local
->common
.added_at
= tt_local
->last_seen
;
565 /* the batman interface mac address should never be purged */
566 if (batadv_compare_eth(addr
, soft_iface
->dev_addr
))
567 tt_local
->common
.flags
|= BATADV_TT_CLIENT_NOPURGE
;
569 hash_added
= batadv_hash_add(bat_priv
->tt
.local_hash
, batadv_compare_tt
,
570 batadv_choose_tt
, &tt_local
->common
,
571 &tt_local
->common
.hash_entry
);
573 if (unlikely(hash_added
!= 0)) {
574 /* remove the reference for the hash */
575 batadv_tt_local_entry_free_ref(tt_local
);
580 batadv_tt_local_event(bat_priv
, tt_local
, BATADV_NO_FLAGS
);
583 /* Check whether it is a roaming, but don't do anything if the roaming
584 * process has already been handled
586 if (tt_global
&& !(tt_global
->common
.flags
& BATADV_TT_CLIENT_ROAM
)) {
587 /* These node are probably going to update their tt table */
588 head
= &tt_global
->orig_list
;
590 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
591 batadv_send_roam_adv(bat_priv
, tt_global
->common
.addr
,
592 tt_global
->common
.vid
,
593 orig_entry
->orig_node
);
597 batadv_tt_global_free(bat_priv
, tt_global
,
601 /* The global entry has to be marked as ROAMING and
602 * has to be kept for consistency purpose
604 tt_global
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
605 tt_global
->roam_at
= jiffies
;
609 /* store the current remote flags before altering them. This helps
610 * understanding is flags are changing or not
612 remote_flags
= tt_local
->common
.flags
& BATADV_TT_REMOTE_MASK
;
614 if (batadv_is_wifi_netdev(in_dev
))
615 tt_local
->common
.flags
|= BATADV_TT_CLIENT_WIFI
;
617 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_WIFI
;
619 /* check the mark in the skb: if it's equal to the configured
620 * isolation_mark, it means the packet is coming from an isolated
623 match_mark
= (mark
& bat_priv
->isolation_mark_mask
);
624 if (bat_priv
->isolation_mark_mask
&&
625 match_mark
== bat_priv
->isolation_mark
)
626 tt_local
->common
.flags
|= BATADV_TT_CLIENT_ISOLA
;
628 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_ISOLA
;
630 /* if any "dynamic" flag has been modified, resend an ADD event for this
631 * entry so that all the nodes can get the new flags
633 if (remote_flags
^ (tt_local
->common
.flags
& BATADV_TT_REMOTE_MASK
))
634 batadv_tt_local_event(bat_priv
, tt_local
, BATADV_NO_FLAGS
);
641 batadv_tt_local_entry_free_ref(tt_local
);
643 batadv_tt_global_entry_free_ref(tt_global
);
648 * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send
649 * within a TT Response directed to another node
650 * @orig_node: originator for which the TT data has to be prepared
651 * @tt_data: uninitialised pointer to the address of the TVLV buffer
652 * @tt_change: uninitialised pointer to the address of the area where the TT
653 * changed can be stored
654 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
655 * function reserves the amount of space needed to send the entire global TT
656 * table. In case of success the value is updated with the real amount of
659 * Allocate the needed amount of memory for the entire TT TVLV and write its
660 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
661 * objects, one per active VLAN served by the originator node.
663 * Return the size of the allocated buffer or 0 in case of failure.
666 batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node
*orig_node
,
667 struct batadv_tvlv_tt_data
**tt_data
,
668 struct batadv_tvlv_tt_change
**tt_change
,
671 uint16_t num_vlan
= 0, num_entries
= 0, change_offset
, tvlv_len
;
672 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
673 struct batadv_orig_node_vlan
*vlan
;
674 uint8_t *tt_change_ptr
;
677 list_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
) {
679 num_entries
+= atomic_read(&vlan
->tt
.num_entries
);
682 change_offset
= sizeof(**tt_data
);
683 change_offset
+= num_vlan
* sizeof(*tt_vlan
);
685 /* if tt_len is negative, allocate the space needed by the full table */
687 *tt_len
= batadv_tt_len(num_entries
);
690 tvlv_len
+= change_offset
;
692 *tt_data
= kmalloc(tvlv_len
, GFP_ATOMIC
);
698 (*tt_data
)->flags
= BATADV_NO_FLAGS
;
699 (*tt_data
)->ttvn
= atomic_read(&orig_node
->last_ttvn
);
700 (*tt_data
)->num_vlan
= htons(num_vlan
);
702 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(*tt_data
+ 1);
703 list_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
) {
704 tt_vlan
->vid
= htons(vlan
->vid
);
705 tt_vlan
->crc
= htonl(vlan
->tt
.crc
);
710 tt_change_ptr
= (uint8_t *)*tt_data
+ change_offset
;
711 *tt_change
= (struct batadv_tvlv_tt_change
*)tt_change_ptr
;
719 * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this
721 * @bat_priv: the bat priv with all the soft interface information
722 * @tt_data: uninitialised pointer to the address of the TVLV buffer
723 * @tt_change: uninitialised pointer to the address of the area where the TT
724 * changes can be stored
725 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
726 * function reserves the amount of space needed to send the entire local TT
727 * table. In case of success the value is updated with the real amount of
730 * Allocate the needed amount of memory for the entire TT TVLV and write its
731 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
732 * objects, one per active VLAN.
734 * Return the size of the allocated buffer or 0 in case of failure.
737 batadv_tt_prepare_tvlv_local_data(struct batadv_priv
*bat_priv
,
738 struct batadv_tvlv_tt_data
**tt_data
,
739 struct batadv_tvlv_tt_change
**tt_change
,
742 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
743 struct batadv_softif_vlan
*vlan
;
744 uint16_t num_vlan
= 0, num_entries
= 0, tvlv_len
;
745 uint8_t *tt_change_ptr
;
749 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
751 num_entries
+= atomic_read(&vlan
->tt
.num_entries
);
754 change_offset
= sizeof(**tt_data
);
755 change_offset
+= num_vlan
* sizeof(*tt_vlan
);
757 /* if tt_len is negative, allocate the space needed by the full table */
759 *tt_len
= batadv_tt_len(num_entries
);
762 tvlv_len
+= change_offset
;
764 *tt_data
= kmalloc(tvlv_len
, GFP_ATOMIC
);
770 (*tt_data
)->flags
= BATADV_NO_FLAGS
;
771 (*tt_data
)->ttvn
= atomic_read(&bat_priv
->tt
.vn
);
772 (*tt_data
)->num_vlan
= htons(num_vlan
);
774 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(*tt_data
+ 1);
775 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
776 tt_vlan
->vid
= htons(vlan
->vid
);
777 tt_vlan
->crc
= htonl(vlan
->tt
.crc
);
782 tt_change_ptr
= (uint8_t *)*tt_data
+ change_offset
;
783 *tt_change
= (struct batadv_tvlv_tt_change
*)tt_change_ptr
;
791 * batadv_tt_tvlv_container_update - update the translation table tvlv container
792 * after local tt changes have been committed
793 * @bat_priv: the bat priv with all the soft interface information
795 static void batadv_tt_tvlv_container_update(struct batadv_priv
*bat_priv
)
797 struct batadv_tt_change_node
*entry
, *safe
;
798 struct batadv_tvlv_tt_data
*tt_data
;
799 struct batadv_tvlv_tt_change
*tt_change
;
800 int tt_diff_len
, tt_change_len
= 0;
801 int tt_diff_entries_num
= 0, tt_diff_entries_count
= 0;
804 tt_diff_entries_num
= atomic_read(&bat_priv
->tt
.local_changes
);
805 tt_diff_len
= batadv_tt_len(tt_diff_entries_num
);
807 /* if we have too many changes for one packet don't send any
808 * and wait for the tt table request which will be fragmented
810 if (tt_diff_len
> bat_priv
->soft_iface
->mtu
)
813 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
, &tt_data
,
814 &tt_change
, &tt_diff_len
);
818 tt_data
->flags
= BATADV_TT_OGM_DIFF
;
820 if (tt_diff_len
== 0)
821 goto container_register
;
823 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
824 atomic_set(&bat_priv
->tt
.local_changes
, 0);
826 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
828 if (tt_diff_entries_count
< tt_diff_entries_num
) {
829 memcpy(tt_change
+ tt_diff_entries_count
,
831 sizeof(struct batadv_tvlv_tt_change
));
832 tt_diff_entries_count
++;
834 list_del(&entry
->list
);
837 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
839 /* Keep the buffer for possible tt_request */
840 spin_lock_bh(&bat_priv
->tt
.last_changeset_lock
);
841 kfree(bat_priv
->tt
.last_changeset
);
842 bat_priv
->tt
.last_changeset_len
= 0;
843 bat_priv
->tt
.last_changeset
= NULL
;
844 tt_change_len
= batadv_tt_len(tt_diff_entries_count
);
845 /* check whether this new OGM has no changes due to size problems */
846 if (tt_diff_entries_count
> 0) {
847 /* if kmalloc() fails we will reply with the full table
848 * instead of providing the diff
850 bat_priv
->tt
.last_changeset
= kzalloc(tt_diff_len
, GFP_ATOMIC
);
851 if (bat_priv
->tt
.last_changeset
) {
852 memcpy(bat_priv
->tt
.last_changeset
,
853 tt_change
, tt_change_len
);
854 bat_priv
->tt
.last_changeset_len
= tt_diff_len
;
857 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
860 batadv_tvlv_container_register(bat_priv
, BATADV_TVLV_TT
, 1, tt_data
,
865 int batadv_tt_local_seq_print_text(struct seq_file
*seq
, void *offset
)
867 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
868 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
869 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
870 struct batadv_tt_common_entry
*tt_common_entry
;
871 struct batadv_tt_local_entry
*tt_local
;
872 struct batadv_hard_iface
*primary_if
;
873 struct batadv_softif_vlan
*vlan
;
874 struct hlist_head
*head
;
879 unsigned long last_seen_jiffies
;
881 uint16_t np_flag
= BATADV_TT_CLIENT_NOPURGE
;
883 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
888 "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n",
889 net_dev
->name
, (uint8_t)atomic_read(&bat_priv
->tt
.vn
));
890 seq_printf(seq
, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID",
891 "Flags", "Last seen", "CRC");
893 for (i
= 0; i
< hash
->size
; i
++) {
894 head
= &hash
->table
[i
];
897 hlist_for_each_entry_rcu(tt_common_entry
,
899 tt_local
= container_of(tt_common_entry
,
900 struct batadv_tt_local_entry
,
902 vid
= tt_common_entry
->vid
;
903 last_seen_jiffies
= jiffies
- tt_local
->last_seen
;
904 last_seen_msecs
= jiffies_to_msecs(last_seen_jiffies
);
905 last_seen_secs
= last_seen_msecs
/ 1000;
906 last_seen_msecs
= last_seen_msecs
% 1000;
908 no_purge
= tt_common_entry
->flags
& np_flag
;
910 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
912 seq_printf(seq
, "Cannot retrieve VLAN %d\n",
913 BATADV_PRINT_VID(vid
));
918 " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n",
919 tt_common_entry
->addr
,
920 BATADV_PRINT_VID(tt_common_entry
->vid
),
921 (tt_common_entry
->flags
&
922 BATADV_TT_CLIENT_ROAM
? 'R' : '.'),
923 no_purge
? 'P' : '.',
924 (tt_common_entry
->flags
&
925 BATADV_TT_CLIENT_NEW
? 'N' : '.'),
926 (tt_common_entry
->flags
&
927 BATADV_TT_CLIENT_PENDING
? 'X' : '.'),
928 (tt_common_entry
->flags
&
929 BATADV_TT_CLIENT_WIFI
? 'W' : '.'),
930 (tt_common_entry
->flags
&
931 BATADV_TT_CLIENT_ISOLA
? 'I' : '.'),
932 no_purge
? 0 : last_seen_secs
,
933 no_purge
? 0 : last_seen_msecs
,
936 batadv_softif_vlan_free_ref(vlan
);
942 batadv_hardif_free_ref(primary_if
);
947 batadv_tt_local_set_pending(struct batadv_priv
*bat_priv
,
948 struct batadv_tt_local_entry
*tt_local_entry
,
949 uint16_t flags
, const char *message
)
951 batadv_tt_local_event(bat_priv
, tt_local_entry
, flags
);
953 /* The local client has to be marked as "pending to be removed" but has
954 * to be kept in the table in order to send it in a full table
955 * response issued before the net ttvn increment (consistency check)
957 tt_local_entry
->common
.flags
|= BATADV_TT_CLIENT_PENDING
;
959 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
960 "Local tt entry (%pM, vid: %d) pending to be removed: %s\n",
961 tt_local_entry
->common
.addr
,
962 BATADV_PRINT_VID(tt_local_entry
->common
.vid
), message
);
966 * batadv_tt_local_remove - logically remove an entry from the local table
967 * @bat_priv: the bat priv with all the soft interface information
968 * @addr: the MAC address of the client to remove
969 * @vid: VLAN identifier
970 * @message: message to append to the log on deletion
971 * @roaming: true if the deletion is due to a roaming event
973 * Returns the flags assigned to the local entry before being deleted
975 uint16_t batadv_tt_local_remove(struct batadv_priv
*bat_priv
,
976 const uint8_t *addr
, unsigned short vid
,
977 const char *message
, bool roaming
)
979 struct batadv_tt_local_entry
*tt_local_entry
;
980 uint16_t flags
, curr_flags
= BATADV_NO_FLAGS
;
982 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
986 curr_flags
= tt_local_entry
->common
.flags
;
988 flags
= BATADV_TT_CLIENT_DEL
;
989 /* if this global entry addition is due to a roaming, the node has to
990 * mark the local entry as "roamed" in order to correctly reroute
994 flags
|= BATADV_TT_CLIENT_ROAM
;
995 /* mark the local client as ROAMed */
996 tt_local_entry
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
999 if (!(tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NEW
)) {
1000 batadv_tt_local_set_pending(bat_priv
, tt_local_entry
, flags
,
1004 /* if this client has been added right now, it is possible to
1005 * immediately purge it
1007 batadv_tt_local_event(bat_priv
, tt_local_entry
, BATADV_TT_CLIENT_DEL
);
1008 hlist_del_rcu(&tt_local_entry
->common
.hash_entry
);
1009 batadv_tt_local_entry_free_ref(tt_local_entry
);
1013 batadv_tt_local_entry_free_ref(tt_local_entry
);
1019 * batadv_tt_local_purge_list - purge inactive tt local entries
1020 * @bat_priv: the bat priv with all the soft interface information
1021 * @head: pointer to the list containing the local tt entries
1022 * @timeout: parameter deciding whether a given tt local entry is considered
1025 static void batadv_tt_local_purge_list(struct batadv_priv
*bat_priv
,
1026 struct hlist_head
*head
,
1029 struct batadv_tt_local_entry
*tt_local_entry
;
1030 struct batadv_tt_common_entry
*tt_common_entry
;
1031 struct hlist_node
*node_tmp
;
1033 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
, head
,
1035 tt_local_entry
= container_of(tt_common_entry
,
1036 struct batadv_tt_local_entry
,
1038 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NOPURGE
)
1041 /* entry already marked for deletion */
1042 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
)
1045 if (!batadv_has_timed_out(tt_local_entry
->last_seen
, timeout
))
1048 batadv_tt_local_set_pending(bat_priv
, tt_local_entry
,
1049 BATADV_TT_CLIENT_DEL
, "timed out");
1054 * batadv_tt_local_purge - purge inactive tt local entries
1055 * @bat_priv: the bat priv with all the soft interface information
1056 * @timeout: parameter deciding whether a given tt local entry is considered
1059 static void batadv_tt_local_purge(struct batadv_priv
*bat_priv
,
1062 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
1063 struct hlist_head
*head
;
1064 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1067 for (i
= 0; i
< hash
->size
; i
++) {
1068 head
= &hash
->table
[i
];
1069 list_lock
= &hash
->list_locks
[i
];
1071 spin_lock_bh(list_lock
);
1072 batadv_tt_local_purge_list(bat_priv
, head
, timeout
);
1073 spin_unlock_bh(list_lock
);
1077 static void batadv_tt_local_table_free(struct batadv_priv
*bat_priv
)
1079 struct batadv_hashtable
*hash
;
1080 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1081 struct batadv_tt_common_entry
*tt_common_entry
;
1082 struct batadv_tt_local_entry
*tt_local
;
1083 struct hlist_node
*node_tmp
;
1084 struct hlist_head
*head
;
1087 if (!bat_priv
->tt
.local_hash
)
1090 hash
= bat_priv
->tt
.local_hash
;
1092 for (i
= 0; i
< hash
->size
; i
++) {
1093 head
= &hash
->table
[i
];
1094 list_lock
= &hash
->list_locks
[i
];
1096 spin_lock_bh(list_lock
);
1097 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
,
1099 hlist_del_rcu(&tt_common_entry
->hash_entry
);
1100 tt_local
= container_of(tt_common_entry
,
1101 struct batadv_tt_local_entry
,
1103 batadv_tt_local_entry_free_ref(tt_local
);
1105 spin_unlock_bh(list_lock
);
1108 batadv_hash_destroy(hash
);
1110 bat_priv
->tt
.local_hash
= NULL
;
1113 static int batadv_tt_global_init(struct batadv_priv
*bat_priv
)
1115 if (bat_priv
->tt
.global_hash
)
1118 bat_priv
->tt
.global_hash
= batadv_hash_new(1024);
1120 if (!bat_priv
->tt
.global_hash
)
1123 batadv_hash_set_lock_class(bat_priv
->tt
.global_hash
,
1124 &batadv_tt_global_hash_lock_class_key
);
1129 static void batadv_tt_changes_list_free(struct batadv_priv
*bat_priv
)
1131 struct batadv_tt_change_node
*entry
, *safe
;
1133 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
1135 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
1137 list_del(&entry
->list
);
1141 atomic_set(&bat_priv
->tt
.local_changes
, 0);
1142 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
1145 /* retrieves the orig_tt_list_entry belonging to orig_node from the
1146 * batadv_tt_global_entry list
1148 * returns it with an increased refcounter, NULL if not found
1150 static struct batadv_tt_orig_list_entry
*
1151 batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry
*entry
,
1152 const struct batadv_orig_node
*orig_node
)
1154 struct batadv_tt_orig_list_entry
*tmp_orig_entry
, *orig_entry
= NULL
;
1155 const struct hlist_head
*head
;
1158 head
= &entry
->orig_list
;
1159 hlist_for_each_entry_rcu(tmp_orig_entry
, head
, list
) {
1160 if (tmp_orig_entry
->orig_node
!= orig_node
)
1162 if (!atomic_inc_not_zero(&tmp_orig_entry
->refcount
))
1165 orig_entry
= tmp_orig_entry
;
1173 /* find out if an orig_node is already in the list of a tt_global_entry.
1174 * returns true if found, false otherwise
1177 batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry
*entry
,
1178 const struct batadv_orig_node
*orig_node
)
1180 struct batadv_tt_orig_list_entry
*orig_entry
;
1183 orig_entry
= batadv_tt_global_orig_entry_find(entry
, orig_node
);
1186 batadv_tt_orig_list_entry_free_ref(orig_entry
);
1193 batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry
*tt_global
,
1194 struct batadv_orig_node
*orig_node
, int ttvn
)
1196 struct batadv_tt_orig_list_entry
*orig_entry
;
1198 orig_entry
= batadv_tt_global_orig_entry_find(tt_global
, orig_node
);
1200 /* refresh the ttvn: the current value could be a bogus one that
1201 * was added during a "temporary client detection"
1203 orig_entry
->ttvn
= ttvn
;
1207 orig_entry
= kzalloc(sizeof(*orig_entry
), GFP_ATOMIC
);
1211 INIT_HLIST_NODE(&orig_entry
->list
);
1212 atomic_inc(&orig_node
->refcount
);
1213 batadv_tt_global_size_inc(orig_node
, tt_global
->common
.vid
);
1214 orig_entry
->orig_node
= orig_node
;
1215 orig_entry
->ttvn
= ttvn
;
1216 atomic_set(&orig_entry
->refcount
, 2);
1218 spin_lock_bh(&tt_global
->list_lock
);
1219 hlist_add_head_rcu(&orig_entry
->list
,
1220 &tt_global
->orig_list
);
1221 spin_unlock_bh(&tt_global
->list_lock
);
1224 batadv_tt_orig_list_entry_free_ref(orig_entry
);
1228 * batadv_tt_global_add - add a new TT global entry or update an existing one
1229 * @bat_priv: the bat priv with all the soft interface information
1230 * @orig_node: the originator announcing the client
1231 * @tt_addr: the mac address of the non-mesh client
1232 * @vid: VLAN identifier
1233 * @flags: TT flags that have to be set for this non-mesh client
1234 * @ttvn: the tt version number ever announcing this non-mesh client
1236 * Add a new TT global entry for the given originator. If the entry already
1237 * exists add a new reference to the given originator (a global entry can have
1238 * references to multiple originators) and adjust the flags attribute to reflect
1239 * the function argument.
1240 * If a TT local entry exists for this non-mesh client remove it.
1242 * The caller must hold orig_node refcount.
1244 * Return true if the new entry has been added, false otherwise
1246 static bool batadv_tt_global_add(struct batadv_priv
*bat_priv
,
1247 struct batadv_orig_node
*orig_node
,
1248 const unsigned char *tt_addr
,
1249 unsigned short vid
, uint16_t flags
,
1252 struct batadv_tt_global_entry
*tt_global_entry
;
1253 struct batadv_tt_local_entry
*tt_local_entry
;
1256 struct batadv_tt_common_entry
*common
;
1257 uint16_t local_flags
;
1259 /* ignore global entries from backbone nodes */
1260 if (batadv_bla_is_backbone_gw_orig(bat_priv
, orig_node
->orig
, vid
))
1263 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, tt_addr
, vid
);
1264 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, tt_addr
, vid
);
1266 /* if the node already has a local client for this entry, it has to wait
1267 * for a roaming advertisement instead of manually messing up the global
1270 if ((flags
& BATADV_TT_CLIENT_TEMP
) && tt_local_entry
&&
1271 !(tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NEW
))
1274 if (!tt_global_entry
) {
1275 tt_global_entry
= kzalloc(sizeof(*tt_global_entry
), GFP_ATOMIC
);
1276 if (!tt_global_entry
)
1279 common
= &tt_global_entry
->common
;
1280 memcpy(common
->addr
, tt_addr
, ETH_ALEN
);
1283 common
->flags
= flags
;
1284 tt_global_entry
->roam_at
= 0;
1285 /* node must store current time in case of roaming. This is
1286 * needed to purge this entry out on timeout (if nobody claims
1289 if (flags
& BATADV_TT_CLIENT_ROAM
)
1290 tt_global_entry
->roam_at
= jiffies
;
1291 atomic_set(&common
->refcount
, 2);
1292 common
->added_at
= jiffies
;
1294 INIT_HLIST_HEAD(&tt_global_entry
->orig_list
);
1295 spin_lock_init(&tt_global_entry
->list_lock
);
1297 hash_added
= batadv_hash_add(bat_priv
->tt
.global_hash
,
1299 batadv_choose_tt
, common
,
1300 &common
->hash_entry
);
1302 if (unlikely(hash_added
!= 0)) {
1303 /* remove the reference for the hash */
1304 batadv_tt_global_entry_free_ref(tt_global_entry
);
1308 common
= &tt_global_entry
->common
;
1309 /* If there is already a global entry, we can use this one for
1311 * But if we are trying to add a temporary client then here are
1312 * two options at this point:
1313 * 1) the global client is not a temporary client: the global
1314 * client has to be left as it is, temporary information
1315 * should never override any already known client state
1316 * 2) the global client is a temporary client: purge the
1317 * originator list and add the new one orig_entry
1319 if (flags
& BATADV_TT_CLIENT_TEMP
) {
1320 if (!(common
->flags
& BATADV_TT_CLIENT_TEMP
))
1322 if (batadv_tt_global_entry_has_orig(tt_global_entry
,
1325 batadv_tt_global_del_orig_list(tt_global_entry
);
1326 goto add_orig_entry
;
1329 /* if the client was temporary added before receiving the first
1330 * OGM announcing it, we have to clear the TEMP flag
1332 common
->flags
&= ~BATADV_TT_CLIENT_TEMP
;
1334 /* the change can carry possible "attribute" flags like the
1335 * TT_CLIENT_WIFI, therefore they have to be copied in the
1338 tt_global_entry
->common
.flags
|= flags
;
1340 /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only
1341 * one originator left in the list and we previously received a
1342 * delete + roaming change for this originator.
1344 * We should first delete the old originator before adding the
1347 if (common
->flags
& BATADV_TT_CLIENT_ROAM
) {
1348 batadv_tt_global_del_orig_list(tt_global_entry
);
1349 common
->flags
&= ~BATADV_TT_CLIENT_ROAM
;
1350 tt_global_entry
->roam_at
= 0;
1354 /* add the new orig_entry (if needed) or update it */
1355 batadv_tt_global_orig_entry_add(tt_global_entry
, orig_node
, ttvn
);
1357 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1358 "Creating new global tt entry: %pM (vid: %d, via %pM)\n",
1359 common
->addr
, BATADV_PRINT_VID(common
->vid
),
1365 /* remove address from local hash if present */
1366 local_flags
= batadv_tt_local_remove(bat_priv
, tt_addr
, vid
,
1367 "global tt received",
1368 flags
& BATADV_TT_CLIENT_ROAM
);
1369 tt_global_entry
->common
.flags
|= local_flags
& BATADV_TT_CLIENT_WIFI
;
1371 if (!(flags
& BATADV_TT_CLIENT_ROAM
))
1372 /* this is a normal global add. Therefore the client is not in a
1373 * roaming state anymore.
1375 tt_global_entry
->common
.flags
&= ~BATADV_TT_CLIENT_ROAM
;
1378 if (tt_global_entry
)
1379 batadv_tt_global_entry_free_ref(tt_global_entry
);
1381 batadv_tt_local_entry_free_ref(tt_local_entry
);
1386 * batadv_transtable_best_orig - Get best originator list entry from tt entry
1387 * @bat_priv: the bat priv with all the soft interface information
1388 * @tt_global_entry: global translation table entry to be analyzed
1390 * This functon assumes the caller holds rcu_read_lock().
1391 * Returns best originator list entry or NULL on errors.
1393 static struct batadv_tt_orig_list_entry
*
1394 batadv_transtable_best_orig(struct batadv_priv
*bat_priv
,
1395 struct batadv_tt_global_entry
*tt_global_entry
)
1397 struct batadv_neigh_node
*router
, *best_router
= NULL
;
1398 struct batadv_algo_ops
*bao
= bat_priv
->bat_algo_ops
;
1399 struct hlist_head
*head
;
1400 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
= NULL
;
1402 head
= &tt_global_entry
->orig_list
;
1403 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1404 router
= batadv_orig_router_get(orig_entry
->orig_node
,
1410 bao
->bat_neigh_cmp(router
, BATADV_IF_DEFAULT
,
1411 best_router
, BATADV_IF_DEFAULT
) <= 0) {
1412 batadv_neigh_node_free_ref(router
);
1416 /* release the refcount for the "old" best */
1418 batadv_neigh_node_free_ref(best_router
);
1420 best_entry
= orig_entry
;
1421 best_router
= router
;
1425 batadv_neigh_node_free_ref(best_router
);
1431 * batadv_tt_global_print_entry - print all orig nodes who announce the address
1432 * for this global entry
1433 * @bat_priv: the bat priv with all the soft interface information
1434 * @tt_global_entry: global translation table entry to be printed
1435 * @seq: debugfs table seq_file struct
1437 * This functon assumes the caller holds rcu_read_lock().
1440 batadv_tt_global_print_entry(struct batadv_priv
*bat_priv
,
1441 struct batadv_tt_global_entry
*tt_global_entry
,
1442 struct seq_file
*seq
)
1444 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
;
1445 struct batadv_tt_common_entry
*tt_common_entry
;
1446 struct batadv_orig_node_vlan
*vlan
;
1447 struct hlist_head
*head
;
1451 tt_common_entry
= &tt_global_entry
->common
;
1452 flags
= tt_common_entry
->flags
;
1454 best_entry
= batadv_transtable_best_orig(bat_priv
, tt_global_entry
);
1456 vlan
= batadv_orig_node_vlan_get(best_entry
->orig_node
,
1457 tt_common_entry
->vid
);
1460 " * Cannot retrieve VLAN %d for originator %pM\n",
1461 BATADV_PRINT_VID(tt_common_entry
->vid
),
1462 best_entry
->orig_node
->orig
);
1466 last_ttvn
= atomic_read(&best_entry
->orig_node
->last_ttvn
);
1468 " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1469 '*', tt_global_entry
->common
.addr
,
1470 BATADV_PRINT_VID(tt_global_entry
->common
.vid
),
1471 best_entry
->ttvn
, best_entry
->orig_node
->orig
,
1472 last_ttvn
, vlan
->tt
.crc
,
1473 (flags
& BATADV_TT_CLIENT_ROAM
? 'R' : '.'),
1474 (flags
& BATADV_TT_CLIENT_WIFI
? 'W' : '.'),
1475 (flags
& BATADV_TT_CLIENT_ISOLA
? 'I' : '.'),
1476 (flags
& BATADV_TT_CLIENT_TEMP
? 'T' : '.'));
1478 batadv_orig_node_vlan_free_ref(vlan
);
1482 head
= &tt_global_entry
->orig_list
;
1484 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1485 if (best_entry
== orig_entry
)
1488 vlan
= batadv_orig_node_vlan_get(orig_entry
->orig_node
,
1489 tt_common_entry
->vid
);
1492 " + Cannot retrieve VLAN %d for originator %pM\n",
1493 BATADV_PRINT_VID(tt_common_entry
->vid
),
1494 orig_entry
->orig_node
->orig
);
1498 last_ttvn
= atomic_read(&orig_entry
->orig_node
->last_ttvn
);
1500 " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1501 '+', tt_global_entry
->common
.addr
,
1502 BATADV_PRINT_VID(tt_global_entry
->common
.vid
),
1503 orig_entry
->ttvn
, orig_entry
->orig_node
->orig
,
1504 last_ttvn
, vlan
->tt
.crc
,
1505 (flags
& BATADV_TT_CLIENT_ROAM
? 'R' : '.'),
1506 (flags
& BATADV_TT_CLIENT_WIFI
? 'W' : '.'),
1507 (flags
& BATADV_TT_CLIENT_ISOLA
? 'I' : '.'),
1508 (flags
& BATADV_TT_CLIENT_TEMP
? 'T' : '.'));
1510 batadv_orig_node_vlan_free_ref(vlan
);
1514 int batadv_tt_global_seq_print_text(struct seq_file
*seq
, void *offset
)
1516 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1517 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
1518 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
1519 struct batadv_tt_common_entry
*tt_common_entry
;
1520 struct batadv_tt_global_entry
*tt_global
;
1521 struct batadv_hard_iface
*primary_if
;
1522 struct hlist_head
*head
;
1525 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
1530 "Globally announced TT entries received via the mesh %s\n",
1532 seq_printf(seq
, " %-13s %s %s %-15s %s (%-10s) %s\n",
1533 "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)",
1536 for (i
= 0; i
< hash
->size
; i
++) {
1537 head
= &hash
->table
[i
];
1540 hlist_for_each_entry_rcu(tt_common_entry
,
1542 tt_global
= container_of(tt_common_entry
,
1543 struct batadv_tt_global_entry
,
1545 batadv_tt_global_print_entry(bat_priv
, tt_global
, seq
);
1551 batadv_hardif_free_ref(primary_if
);
1555 /* deletes the orig list of a tt_global_entry */
1557 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry
*tt_global_entry
)
1559 struct hlist_head
*head
;
1560 struct hlist_node
*safe
;
1561 struct batadv_tt_orig_list_entry
*orig_entry
;
1563 spin_lock_bh(&tt_global_entry
->list_lock
);
1564 head
= &tt_global_entry
->orig_list
;
1565 hlist_for_each_entry_safe(orig_entry
, safe
, head
, list
) {
1566 hlist_del_rcu(&orig_entry
->list
);
1567 batadv_tt_global_size_dec(orig_entry
->orig_node
,
1568 tt_global_entry
->common
.vid
);
1569 batadv_tt_orig_list_entry_free_ref(orig_entry
);
1571 spin_unlock_bh(&tt_global_entry
->list_lock
);
1575 batadv_tt_global_del_orig_entry(struct batadv_priv
*bat_priv
,
1576 struct batadv_tt_global_entry
*tt_global_entry
,
1577 struct batadv_orig_node
*orig_node
,
1578 const char *message
)
1580 struct hlist_head
*head
;
1581 struct hlist_node
*safe
;
1582 struct batadv_tt_orig_list_entry
*orig_entry
;
1585 spin_lock_bh(&tt_global_entry
->list_lock
);
1586 head
= &tt_global_entry
->orig_list
;
1587 hlist_for_each_entry_safe(orig_entry
, safe
, head
, list
) {
1588 if (orig_entry
->orig_node
== orig_node
) {
1589 vid
= tt_global_entry
->common
.vid
;
1590 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1591 "Deleting %pM from global tt entry %pM (vid: %d): %s\n",
1593 tt_global_entry
->common
.addr
,
1594 BATADV_PRINT_VID(vid
), message
);
1595 hlist_del_rcu(&orig_entry
->list
);
1596 batadv_tt_global_size_dec(orig_node
,
1597 tt_global_entry
->common
.vid
);
1598 batadv_tt_orig_list_entry_free_ref(orig_entry
);
1601 spin_unlock_bh(&tt_global_entry
->list_lock
);
1604 /* If the client is to be deleted, we check if it is the last origantor entry
1605 * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the
1606 * timer, otherwise we simply remove the originator scheduled for deletion.
1609 batadv_tt_global_del_roaming(struct batadv_priv
*bat_priv
,
1610 struct batadv_tt_global_entry
*tt_global_entry
,
1611 struct batadv_orig_node
*orig_node
,
1612 const char *message
)
1614 bool last_entry
= true;
1615 struct hlist_head
*head
;
1616 struct batadv_tt_orig_list_entry
*orig_entry
;
1618 /* no local entry exists, case 1:
1619 * Check if this is the last one or if other entries exist.
1623 head
= &tt_global_entry
->orig_list
;
1624 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1625 if (orig_entry
->orig_node
!= orig_node
) {
1633 /* its the last one, mark for roaming. */
1634 tt_global_entry
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
1635 tt_global_entry
->roam_at
= jiffies
;
1637 /* there is another entry, we can simply delete this
1638 * one and can still use the other one.
1640 batadv_tt_global_del_orig_entry(bat_priv
, tt_global_entry
,
1641 orig_node
, message
);
1645 * batadv_tt_global_del - remove a client from the global table
1646 * @bat_priv: the bat priv with all the soft interface information
1647 * @orig_node: an originator serving this client
1648 * @addr: the mac address of the client
1649 * @vid: VLAN identifier
1650 * @message: a message explaining the reason for deleting the client to print
1651 * for debugging purpose
1652 * @roaming: true if the deletion has been triggered by a roaming event
1654 static void batadv_tt_global_del(struct batadv_priv
*bat_priv
,
1655 struct batadv_orig_node
*orig_node
,
1656 const unsigned char *addr
, unsigned short vid
,
1657 const char *message
, bool roaming
)
1659 struct batadv_tt_global_entry
*tt_global_entry
;
1660 struct batadv_tt_local_entry
*local_entry
= NULL
;
1662 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
1663 if (!tt_global_entry
)
1667 batadv_tt_global_del_orig_entry(bat_priv
, tt_global_entry
,
1668 orig_node
, message
);
1670 if (hlist_empty(&tt_global_entry
->orig_list
))
1671 batadv_tt_global_free(bat_priv
, tt_global_entry
,
1677 /* if we are deleting a global entry due to a roam
1678 * event, there are two possibilities:
1679 * 1) the client roamed from node A to node B => if there
1680 * is only one originator left for this client, we mark
1681 * it with BATADV_TT_CLIENT_ROAM, we start a timer and we
1682 * wait for node B to claim it. In case of timeout
1683 * the entry is purged.
1685 * If there are other originators left, we directly delete
1687 * 2) the client roamed to us => we can directly delete
1688 * the global entry, since it is useless now.
1690 local_entry
= batadv_tt_local_hash_find(bat_priv
,
1691 tt_global_entry
->common
.addr
,
1694 /* local entry exists, case 2: client roamed to us. */
1695 batadv_tt_global_del_orig_list(tt_global_entry
);
1696 batadv_tt_global_free(bat_priv
, tt_global_entry
, message
);
1698 /* no local entry exists, case 1: check for roaming */
1699 batadv_tt_global_del_roaming(bat_priv
, tt_global_entry
,
1700 orig_node
, message
);
1704 if (tt_global_entry
)
1705 batadv_tt_global_entry_free_ref(tt_global_entry
);
1707 batadv_tt_local_entry_free_ref(local_entry
);
1711 * batadv_tt_global_del_orig - remove all the TT global entries belonging to the
1712 * given originator matching the provided vid
1713 * @bat_priv: the bat priv with all the soft interface information
1714 * @orig_node: the originator owning the entries to remove
1715 * @match_vid: the VLAN identifier to match. If negative all the entries will be
1717 * @message: debug message to print as "reason"
1719 void batadv_tt_global_del_orig(struct batadv_priv
*bat_priv
,
1720 struct batadv_orig_node
*orig_node
,
1722 const char *message
)
1724 struct batadv_tt_global_entry
*tt_global
;
1725 struct batadv_tt_common_entry
*tt_common_entry
;
1727 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
1728 struct hlist_node
*safe
;
1729 struct hlist_head
*head
;
1730 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1736 for (i
= 0; i
< hash
->size
; i
++) {
1737 head
= &hash
->table
[i
];
1738 list_lock
= &hash
->list_locks
[i
];
1740 spin_lock_bh(list_lock
);
1741 hlist_for_each_entry_safe(tt_common_entry
, safe
,
1743 /* remove only matching entries */
1744 if (match_vid
>= 0 && tt_common_entry
->vid
!= match_vid
)
1747 tt_global
= container_of(tt_common_entry
,
1748 struct batadv_tt_global_entry
,
1751 batadv_tt_global_del_orig_entry(bat_priv
, tt_global
,
1752 orig_node
, message
);
1754 if (hlist_empty(&tt_global
->orig_list
)) {
1755 vid
= tt_global
->common
.vid
;
1756 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1757 "Deleting global tt entry %pM (vid: %d): %s\n",
1758 tt_global
->common
.addr
,
1759 BATADV_PRINT_VID(vid
), message
);
1760 hlist_del_rcu(&tt_common_entry
->hash_entry
);
1761 batadv_tt_global_entry_free_ref(tt_global
);
1764 spin_unlock_bh(list_lock
);
1766 orig_node
->tt_initialised
= false;
1769 static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry
*tt_global
,
1773 unsigned long roam_timeout
= BATADV_TT_CLIENT_ROAM_TIMEOUT
;
1774 unsigned long temp_timeout
= BATADV_TT_CLIENT_TEMP_TIMEOUT
;
1776 if ((tt_global
->common
.flags
& BATADV_TT_CLIENT_ROAM
) &&
1777 batadv_has_timed_out(tt_global
->roam_at
, roam_timeout
)) {
1779 *msg
= "Roaming timeout\n";
1782 if ((tt_global
->common
.flags
& BATADV_TT_CLIENT_TEMP
) &&
1783 batadv_has_timed_out(tt_global
->common
.added_at
, temp_timeout
)) {
1785 *msg
= "Temporary client timeout\n";
1791 static void batadv_tt_global_purge(struct batadv_priv
*bat_priv
)
1793 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
1794 struct hlist_head
*head
;
1795 struct hlist_node
*node_tmp
;
1796 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1799 struct batadv_tt_common_entry
*tt_common
;
1800 struct batadv_tt_global_entry
*tt_global
;
1802 for (i
= 0; i
< hash
->size
; i
++) {
1803 head
= &hash
->table
[i
];
1804 list_lock
= &hash
->list_locks
[i
];
1806 spin_lock_bh(list_lock
);
1807 hlist_for_each_entry_safe(tt_common
, node_tmp
, head
,
1809 tt_global
= container_of(tt_common
,
1810 struct batadv_tt_global_entry
,
1813 if (!batadv_tt_global_to_purge(tt_global
, &msg
))
1816 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1817 "Deleting global tt entry %pM (vid: %d): %s\n",
1818 tt_global
->common
.addr
,
1819 BATADV_PRINT_VID(tt_global
->common
.vid
),
1822 hlist_del_rcu(&tt_common
->hash_entry
);
1824 batadv_tt_global_entry_free_ref(tt_global
);
1826 spin_unlock_bh(list_lock
);
1830 static void batadv_tt_global_table_free(struct batadv_priv
*bat_priv
)
1832 struct batadv_hashtable
*hash
;
1833 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1834 struct batadv_tt_common_entry
*tt_common_entry
;
1835 struct batadv_tt_global_entry
*tt_global
;
1836 struct hlist_node
*node_tmp
;
1837 struct hlist_head
*head
;
1840 if (!bat_priv
->tt
.global_hash
)
1843 hash
= bat_priv
->tt
.global_hash
;
1845 for (i
= 0; i
< hash
->size
; i
++) {
1846 head
= &hash
->table
[i
];
1847 list_lock
= &hash
->list_locks
[i
];
1849 spin_lock_bh(list_lock
);
1850 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
,
1852 hlist_del_rcu(&tt_common_entry
->hash_entry
);
1853 tt_global
= container_of(tt_common_entry
,
1854 struct batadv_tt_global_entry
,
1856 batadv_tt_global_entry_free_ref(tt_global
);
1858 spin_unlock_bh(list_lock
);
1861 batadv_hash_destroy(hash
);
1863 bat_priv
->tt
.global_hash
= NULL
;
1867 _batadv_is_ap_isolated(struct batadv_tt_local_entry
*tt_local_entry
,
1868 struct batadv_tt_global_entry
*tt_global_entry
)
1872 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_WIFI
&&
1873 tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_WIFI
)
1876 /* check if the two clients are marked as isolated */
1877 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ISOLA
&&
1878 tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_ISOLA
)
1885 * batadv_transtable_search - get the mesh destination for a given client
1886 * @bat_priv: the bat priv with all the soft interface information
1887 * @src: mac address of the source client
1888 * @addr: mac address of the destination client
1889 * @vid: VLAN identifier
1891 * Returns a pointer to the originator that was selected as destination in the
1892 * mesh for contacting the client 'addr', NULL otherwise.
1893 * In case of multiple originators serving the same client, the function returns
1894 * the best one (best in terms of metric towards the destination node).
1896 * If the two clients are AP isolated the function returns NULL.
1898 struct batadv_orig_node
*batadv_transtable_search(struct batadv_priv
*bat_priv
,
1900 const uint8_t *addr
,
1903 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
1904 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
1905 struct batadv_orig_node
*orig_node
= NULL
;
1906 struct batadv_tt_orig_list_entry
*best_entry
;
1908 if (src
&& batadv_vlan_ap_isola_get(bat_priv
, vid
)) {
1909 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, src
, vid
);
1910 if (!tt_local_entry
||
1911 (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
))
1915 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
1916 if (!tt_global_entry
)
1919 /* check whether the clients should not communicate due to AP
1922 if (tt_local_entry
&&
1923 _batadv_is_ap_isolated(tt_local_entry
, tt_global_entry
))
1927 best_entry
= batadv_transtable_best_orig(bat_priv
, tt_global_entry
);
1928 /* found anything? */
1930 orig_node
= best_entry
->orig_node
;
1931 if (orig_node
&& !atomic_inc_not_zero(&orig_node
->refcount
))
1936 if (tt_global_entry
)
1937 batadv_tt_global_entry_free_ref(tt_global_entry
);
1939 batadv_tt_local_entry_free_ref(tt_local_entry
);
1945 * batadv_tt_global_crc - calculates the checksum of the local table belonging
1946 * to the given orig_node
1947 * @bat_priv: the bat priv with all the soft interface information
1948 * @orig_node: originator for which the CRC should be computed
1949 * @vid: VLAN identifier for which the CRC32 has to be computed
1951 * This function computes the checksum for the global table corresponding to a
1952 * specific originator. In particular, the checksum is computed as follows: For
1953 * each client connected to the originator the CRC32C of the MAC address and the
1954 * VID is computed and then all the CRC32Cs of the various clients are xor'ed
1957 * The idea behind is that CRC32C should be used as much as possible in order to
1958 * produce a unique hash of the table, but since the order which is used to feed
1959 * the CRC32C function affects the result and since every node in the network
1960 * probably sorts the clients differently, the hash function cannot be directly
1961 * computed over the entire table. Hence the CRC32C is used only on
1962 * the single client entry, while all the results are then xor'ed together
1963 * because the XOR operation can combine them all while trying to reduce the
1964 * noise as much as possible.
1966 * Returns the checksum of the global table of a given originator.
1968 static uint32_t batadv_tt_global_crc(struct batadv_priv
*bat_priv
,
1969 struct batadv_orig_node
*orig_node
,
1972 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
1973 struct batadv_tt_common_entry
*tt_common
;
1974 struct batadv_tt_global_entry
*tt_global
;
1975 struct hlist_head
*head
;
1976 uint32_t i
, crc_tmp
, crc
= 0;
1980 for (i
= 0; i
< hash
->size
; i
++) {
1981 head
= &hash
->table
[i
];
1984 hlist_for_each_entry_rcu(tt_common
, head
, hash_entry
) {
1985 tt_global
= container_of(tt_common
,
1986 struct batadv_tt_global_entry
,
1988 /* compute the CRC only for entries belonging to the
1989 * VLAN identified by the vid passed as parameter
1991 if (tt_common
->vid
!= vid
)
1994 /* Roaming clients are in the global table for
1995 * consistency only. They don't have to be
1996 * taken into account while computing the
1999 if (tt_common
->flags
& BATADV_TT_CLIENT_ROAM
)
2001 /* Temporary clients have not been announced yet, so
2002 * they have to be skipped while computing the global
2005 if (tt_common
->flags
& BATADV_TT_CLIENT_TEMP
)
2008 /* find out if this global entry is announced by this
2011 if (!batadv_tt_global_entry_has_orig(tt_global
,
2015 /* use network order to read the VID: this ensures that
2016 * every node reads the bytes in the same order.
2018 tmp_vid
= htons(tt_common
->vid
);
2019 crc_tmp
= crc32c(0, &tmp_vid
, sizeof(tmp_vid
));
2021 /* compute the CRC on flags that have to be kept in sync
2024 flags
= tt_common
->flags
& BATADV_TT_SYNC_MASK
;
2025 crc_tmp
= crc32c(crc_tmp
, &flags
, sizeof(flags
));
2027 crc
^= crc32c(crc_tmp
, tt_common
->addr
, ETH_ALEN
);
2036 * batadv_tt_local_crc - calculates the checksum of the local table
2037 * @bat_priv: the bat priv with all the soft interface information
2038 * @vid: VLAN identifier for which the CRC32 has to be computed
2040 * For details about the computation, please refer to the documentation for
2041 * batadv_tt_global_crc().
2043 * Returns the checksum of the local table
2045 static uint32_t batadv_tt_local_crc(struct batadv_priv
*bat_priv
,
2048 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
2049 struct batadv_tt_common_entry
*tt_common
;
2050 struct hlist_head
*head
;
2051 uint32_t i
, crc_tmp
, crc
= 0;
2055 for (i
= 0; i
< hash
->size
; i
++) {
2056 head
= &hash
->table
[i
];
2059 hlist_for_each_entry_rcu(tt_common
, head
, hash_entry
) {
2060 /* compute the CRC only for entries belonging to the
2061 * VLAN identified by vid
2063 if (tt_common
->vid
!= vid
)
2066 /* not yet committed clients have not to be taken into
2067 * account while computing the CRC
2069 if (tt_common
->flags
& BATADV_TT_CLIENT_NEW
)
2072 /* use network order to read the VID: this ensures that
2073 * every node reads the bytes in the same order.
2075 tmp_vid
= htons(tt_common
->vid
);
2076 crc_tmp
= crc32c(0, &tmp_vid
, sizeof(tmp_vid
));
2078 /* compute the CRC on flags that have to be kept in sync
2081 flags
= tt_common
->flags
& BATADV_TT_SYNC_MASK
;
2082 crc_tmp
= crc32c(crc_tmp
, &flags
, sizeof(flags
));
2084 crc
^= crc32c(crc_tmp
, tt_common
->addr
, ETH_ALEN
);
2092 static void batadv_tt_req_list_free(struct batadv_priv
*bat_priv
)
2094 struct batadv_tt_req_node
*node
, *safe
;
2096 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2098 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
2099 list_del(&node
->list
);
2103 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2106 static void batadv_tt_save_orig_buffer(struct batadv_priv
*bat_priv
,
2107 struct batadv_orig_node
*orig_node
,
2108 const void *tt_buff
,
2109 uint16_t tt_buff_len
)
2111 /* Replace the old buffer only if I received something in the
2112 * last OGM (the OGM could carry no changes)
2114 spin_lock_bh(&orig_node
->tt_buff_lock
);
2115 if (tt_buff_len
> 0) {
2116 kfree(orig_node
->tt_buff
);
2117 orig_node
->tt_buff_len
= 0;
2118 orig_node
->tt_buff
= kmalloc(tt_buff_len
, GFP_ATOMIC
);
2119 if (orig_node
->tt_buff
) {
2120 memcpy(orig_node
->tt_buff
, tt_buff
, tt_buff_len
);
2121 orig_node
->tt_buff_len
= tt_buff_len
;
2124 spin_unlock_bh(&orig_node
->tt_buff_lock
);
2127 static void batadv_tt_req_purge(struct batadv_priv
*bat_priv
)
2129 struct batadv_tt_req_node
*node
, *safe
;
2131 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2132 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
2133 if (batadv_has_timed_out(node
->issued_at
,
2134 BATADV_TT_REQUEST_TIMEOUT
)) {
2135 list_del(&node
->list
);
2139 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2142 /* returns the pointer to the new tt_req_node struct if no request
2143 * has already been issued for this orig_node, NULL otherwise
2145 static struct batadv_tt_req_node
*
2146 batadv_new_tt_req_node(struct batadv_priv
*bat_priv
,
2147 struct batadv_orig_node
*orig_node
)
2149 struct batadv_tt_req_node
*tt_req_node_tmp
, *tt_req_node
= NULL
;
2151 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2152 list_for_each_entry(tt_req_node_tmp
, &bat_priv
->tt
.req_list
, list
) {
2153 if (batadv_compare_eth(tt_req_node_tmp
, orig_node
) &&
2154 !batadv_has_timed_out(tt_req_node_tmp
->issued_at
,
2155 BATADV_TT_REQUEST_TIMEOUT
))
2159 tt_req_node
= kmalloc(sizeof(*tt_req_node
), GFP_ATOMIC
);
2163 memcpy(tt_req_node
->addr
, orig_node
->orig
, ETH_ALEN
);
2164 tt_req_node
->issued_at
= jiffies
;
2166 list_add(&tt_req_node
->list
, &bat_priv
->tt
.req_list
);
2168 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2173 * batadv_tt_local_valid - verify that given tt entry is a valid one
2174 * @entry_ptr: to be checked local tt entry
2175 * @data_ptr: not used but definition required to satisfy the callback prototype
2177 * Returns 1 if the entry is a valid, 0 otherwise.
2179 static int batadv_tt_local_valid(const void *entry_ptr
, const void *data_ptr
)
2181 const struct batadv_tt_common_entry
*tt_common_entry
= entry_ptr
;
2183 if (tt_common_entry
->flags
& BATADV_TT_CLIENT_NEW
)
2188 static int batadv_tt_global_valid(const void *entry_ptr
,
2189 const void *data_ptr
)
2191 const struct batadv_tt_common_entry
*tt_common_entry
= entry_ptr
;
2192 const struct batadv_tt_global_entry
*tt_global_entry
;
2193 const struct batadv_orig_node
*orig_node
= data_ptr
;
2195 if (tt_common_entry
->flags
& BATADV_TT_CLIENT_ROAM
||
2196 tt_common_entry
->flags
& BATADV_TT_CLIENT_TEMP
)
2199 tt_global_entry
= container_of(tt_common_entry
,
2200 struct batadv_tt_global_entry
,
2203 return batadv_tt_global_entry_has_orig(tt_global_entry
, orig_node
);
2207 * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the
2209 * @bat_priv: the bat priv with all the soft interface information
2210 * @hash: hash table containing the tt entries
2211 * @tt_len: expected tvlv tt data buffer length in number of bytes
2212 * @tvlv_buff: pointer to the buffer to fill with the TT data
2213 * @valid_cb: function to filter tt change entries
2214 * @cb_data: data passed to the filter function as argument
2216 static void batadv_tt_tvlv_generate(struct batadv_priv
*bat_priv
,
2217 struct batadv_hashtable
*hash
,
2218 void *tvlv_buff
, uint16_t tt_len
,
2219 int (*valid_cb
)(const void *, const void *),
2222 struct batadv_tt_common_entry
*tt_common_entry
;
2223 struct batadv_tvlv_tt_change
*tt_change
;
2224 struct hlist_head
*head
;
2225 uint16_t tt_tot
, tt_num_entries
= 0;
2228 tt_tot
= batadv_tt_entries(tt_len
);
2229 tt_change
= (struct batadv_tvlv_tt_change
*)tvlv_buff
;
2232 for (i
= 0; i
< hash
->size
; i
++) {
2233 head
= &hash
->table
[i
];
2235 hlist_for_each_entry_rcu(tt_common_entry
,
2237 if (tt_tot
== tt_num_entries
)
2240 if ((valid_cb
) && (!valid_cb(tt_common_entry
, cb_data
)))
2243 memcpy(tt_change
->addr
, tt_common_entry
->addr
,
2245 tt_change
->flags
= tt_common_entry
->flags
;
2246 tt_change
->vid
= htons(tt_common_entry
->vid
);
2247 memset(tt_change
->reserved
, 0,
2248 sizeof(tt_change
->reserved
));
2258 * batadv_tt_global_check_crc - check if all the CRCs are correct
2259 * @orig_node: originator for which the CRCs have to be checked
2260 * @tt_vlan: pointer to the first tvlv VLAN entry
2261 * @num_vlan: number of tvlv VLAN entries
2262 * @create: if true, create VLAN objects if not found
2264 * Return true if all the received CRCs match the locally stored ones, false
2267 static bool batadv_tt_global_check_crc(struct batadv_orig_node
*orig_node
,
2268 struct batadv_tvlv_tt_vlan_data
*tt_vlan
,
2271 struct batadv_tvlv_tt_vlan_data
*tt_vlan_tmp
;
2272 struct batadv_orig_node_vlan
*vlan
;
2276 /* check if each received CRC matches the locally stored one */
2277 for (i
= 0; i
< num_vlan
; i
++) {
2278 tt_vlan_tmp
= tt_vlan
+ i
;
2280 /* if orig_node is a backbone node for this VLAN, don't check
2281 * the CRC as we ignore all the global entries over it
2283 if (batadv_bla_is_backbone_gw_orig(orig_node
->bat_priv
,
2285 ntohs(tt_vlan_tmp
->vid
)))
2288 vlan
= batadv_orig_node_vlan_get(orig_node
,
2289 ntohs(tt_vlan_tmp
->vid
));
2294 batadv_orig_node_vlan_free_ref(vlan
);
2296 if (crc
!= ntohl(tt_vlan_tmp
->crc
))
2304 * batadv_tt_local_update_crc - update all the local CRCs
2305 * @bat_priv: the bat priv with all the soft interface information
2307 static void batadv_tt_local_update_crc(struct batadv_priv
*bat_priv
)
2309 struct batadv_softif_vlan
*vlan
;
2311 /* recompute the global CRC for each VLAN */
2313 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
2314 vlan
->tt
.crc
= batadv_tt_local_crc(bat_priv
, vlan
->vid
);
2320 * batadv_tt_global_update_crc - update all the global CRCs for this orig_node
2321 * @bat_priv: the bat priv with all the soft interface information
2322 * @orig_node: the orig_node for which the CRCs have to be updated
2324 static void batadv_tt_global_update_crc(struct batadv_priv
*bat_priv
,
2325 struct batadv_orig_node
*orig_node
)
2327 struct batadv_orig_node_vlan
*vlan
;
2330 /* recompute the global CRC for each VLAN */
2332 list_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
) {
2333 /* if orig_node is a backbone node for this VLAN, don't compute
2334 * the CRC as we ignore all the global entries over it
2336 if (batadv_bla_is_backbone_gw_orig(bat_priv
, orig_node
->orig
,
2340 crc
= batadv_tt_global_crc(bat_priv
, orig_node
, vlan
->vid
);
2347 * batadv_send_tt_request - send a TT Request message to a given node
2348 * @bat_priv: the bat priv with all the soft interface information
2349 * @dst_orig_node: the destination of the message
2350 * @ttvn: the version number that the source of the message is looking for
2351 * @tt_vlan: pointer to the first tvlv VLAN object to request
2352 * @num_vlan: number of tvlv VLAN entries
2353 * @full_table: ask for the entire translation table if true, while only for the
2354 * last TT diff otherwise
2356 static int batadv_send_tt_request(struct batadv_priv
*bat_priv
,
2357 struct batadv_orig_node
*dst_orig_node
,
2359 struct batadv_tvlv_tt_vlan_data
*tt_vlan
,
2360 uint16_t num_vlan
, bool full_table
)
2362 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
2363 struct batadv_tt_req_node
*tt_req_node
= NULL
;
2364 struct batadv_tvlv_tt_vlan_data
*tt_vlan_req
;
2365 struct batadv_hard_iface
*primary_if
;
2369 primary_if
= batadv_primary_if_get_selected(bat_priv
);
2373 /* The new tt_req will be issued only if I'm not waiting for a
2374 * reply from the same orig_node yet
2376 tt_req_node
= batadv_new_tt_req_node(bat_priv
, dst_orig_node
);
2380 size
= sizeof(*tvlv_tt_data
) + sizeof(*tt_vlan_req
) * num_vlan
;
2381 tvlv_tt_data
= kzalloc(size
, GFP_ATOMIC
);
2385 tvlv_tt_data
->flags
= BATADV_TT_REQUEST
;
2386 tvlv_tt_data
->ttvn
= ttvn
;
2387 tvlv_tt_data
->num_vlan
= htons(num_vlan
);
2389 /* send all the CRCs within the request. This is needed by intermediate
2390 * nodes to ensure they have the correct table before replying
2392 tt_vlan_req
= (struct batadv_tvlv_tt_vlan_data
*)(tvlv_tt_data
+ 1);
2393 for (i
= 0; i
< num_vlan
; i
++) {
2394 tt_vlan_req
->vid
= tt_vlan
->vid
;
2395 tt_vlan_req
->crc
= tt_vlan
->crc
;
2402 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
2404 batadv_dbg(BATADV_DBG_TT
, bat_priv
, "Sending TT_REQUEST to %pM [%c]\n",
2405 dst_orig_node
->orig
, full_table
? 'F' : '.');
2407 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_REQUEST_TX
);
2408 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
2409 dst_orig_node
->orig
, BATADV_TVLV_TT
, 1,
2410 tvlv_tt_data
, size
);
2415 batadv_hardif_free_ref(primary_if
);
2416 if (ret
&& tt_req_node
) {
2417 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2418 list_del(&tt_req_node
->list
);
2419 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2422 kfree(tvlv_tt_data
);
2427 * batadv_send_other_tt_response - send reply to tt request concerning another
2428 * node's translation table
2429 * @bat_priv: the bat priv with all the soft interface information
2430 * @tt_data: tt data containing the tt request information
2431 * @req_src: mac address of tt request sender
2432 * @req_dst: mac address of tt request recipient
2434 * Returns true if tt request reply was sent, false otherwise.
2436 static bool batadv_send_other_tt_response(struct batadv_priv
*bat_priv
,
2437 struct batadv_tvlv_tt_data
*tt_data
,
2438 uint8_t *req_src
, uint8_t *req_dst
)
2440 struct batadv_orig_node
*req_dst_orig_node
;
2441 struct batadv_orig_node
*res_dst_orig_node
= NULL
;
2442 struct batadv_tvlv_tt_change
*tt_change
;
2443 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
2444 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
2445 bool ret
= false, full_table
;
2446 uint8_t orig_ttvn
, req_ttvn
;
2450 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2451 "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n",
2452 req_src
, tt_data
->ttvn
, req_dst
,
2453 (tt_data
->flags
& BATADV_TT_FULL_TABLE
? 'F' : '.'));
2455 /* Let's get the orig node of the REAL destination */
2456 req_dst_orig_node
= batadv_orig_hash_find(bat_priv
, req_dst
);
2457 if (!req_dst_orig_node
)
2460 res_dst_orig_node
= batadv_orig_hash_find(bat_priv
, req_src
);
2461 if (!res_dst_orig_node
)
2464 orig_ttvn
= (uint8_t)atomic_read(&req_dst_orig_node
->last_ttvn
);
2465 req_ttvn
= tt_data
->ttvn
;
2467 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(tt_data
+ 1);
2468 /* this node doesn't have the requested data */
2469 if (orig_ttvn
!= req_ttvn
||
2470 !batadv_tt_global_check_crc(req_dst_orig_node
, tt_vlan
,
2471 ntohs(tt_data
->num_vlan
)))
2474 /* If the full table has been explicitly requested */
2475 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
||
2476 !req_dst_orig_node
->tt_buff
)
2481 /* TT fragmentation hasn't been implemented yet, so send as many
2482 * TT entries fit a single packet as possible only
2485 spin_lock_bh(&req_dst_orig_node
->tt_buff_lock
);
2486 tt_len
= req_dst_orig_node
->tt_buff_len
;
2488 tvlv_len
= batadv_tt_prepare_tvlv_global_data(req_dst_orig_node
,
2495 /* Copy the last orig_node's OGM buffer */
2496 memcpy(tt_change
, req_dst_orig_node
->tt_buff
,
2497 req_dst_orig_node
->tt_buff_len
);
2498 spin_unlock_bh(&req_dst_orig_node
->tt_buff_lock
);
2500 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
2501 * in the initial part
2504 tvlv_len
= batadv_tt_prepare_tvlv_global_data(req_dst_orig_node
,
2511 /* fill the rest of the tvlv with the real TT entries */
2512 batadv_tt_tvlv_generate(bat_priv
, bat_priv
->tt
.global_hash
,
2514 batadv_tt_global_valid
,
2518 /* Don't send the response, if larger than fragmented packet. */
2519 tt_len
= sizeof(struct batadv_unicast_tvlv_packet
) + tvlv_len
;
2520 if (tt_len
> atomic_read(&bat_priv
->packet_size_max
)) {
2521 net_ratelimited_function(batadv_info
, bat_priv
->soft_iface
,
2522 "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n",
2523 res_dst_orig_node
->orig
);
2527 tvlv_tt_data
->flags
= BATADV_TT_RESPONSE
;
2528 tvlv_tt_data
->ttvn
= req_ttvn
;
2531 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
2533 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2534 "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n",
2535 res_dst_orig_node
->orig
, req_dst_orig_node
->orig
,
2536 full_table
? 'F' : '.', req_ttvn
);
2538 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_TX
);
2540 batadv_tvlv_unicast_send(bat_priv
, req_dst_orig_node
->orig
,
2541 req_src
, BATADV_TVLV_TT
, 1, tvlv_tt_data
,
2548 spin_unlock_bh(&req_dst_orig_node
->tt_buff_lock
);
2551 if (res_dst_orig_node
)
2552 batadv_orig_node_free_ref(res_dst_orig_node
);
2553 if (req_dst_orig_node
)
2554 batadv_orig_node_free_ref(req_dst_orig_node
);
2555 kfree(tvlv_tt_data
);
2560 * batadv_send_my_tt_response - send reply to tt request concerning this node's
2562 * @bat_priv: the bat priv with all the soft interface information
2563 * @tt_data: tt data containing the tt request information
2564 * @req_src: mac address of tt request sender
2566 * Returns true if tt request reply was sent, false otherwise.
2568 static bool batadv_send_my_tt_response(struct batadv_priv
*bat_priv
,
2569 struct batadv_tvlv_tt_data
*tt_data
,
2572 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
2573 struct batadv_hard_iface
*primary_if
= NULL
;
2574 struct batadv_tvlv_tt_change
*tt_change
;
2575 struct batadv_orig_node
*orig_node
;
2576 uint8_t my_ttvn
, req_ttvn
;
2581 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2582 "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
2583 req_src
, tt_data
->ttvn
,
2584 (tt_data
->flags
& BATADV_TT_FULL_TABLE
? 'F' : '.'));
2586 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
2588 my_ttvn
= (uint8_t)atomic_read(&bat_priv
->tt
.vn
);
2589 req_ttvn
= tt_data
->ttvn
;
2591 orig_node
= batadv_orig_hash_find(bat_priv
, req_src
);
2595 primary_if
= batadv_primary_if_get_selected(bat_priv
);
2599 /* If the full table has been explicitly requested or the gap
2600 * is too big send the whole local translation table
2602 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
|| my_ttvn
!= req_ttvn
||
2603 !bat_priv
->tt
.last_changeset
)
2608 /* TT fragmentation hasn't been implemented yet, so send as many
2609 * TT entries fit a single packet as possible only
2612 spin_lock_bh(&bat_priv
->tt
.last_changeset_lock
);
2614 tt_len
= bat_priv
->tt
.last_changeset_len
;
2615 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
,
2622 /* Copy the last orig_node's OGM buffer */
2623 memcpy(tt_change
, bat_priv
->tt
.last_changeset
,
2624 bat_priv
->tt
.last_changeset_len
);
2625 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
2627 req_ttvn
= (uint8_t)atomic_read(&bat_priv
->tt
.vn
);
2629 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
2630 * in the initial part
2633 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
,
2640 /* fill the rest of the tvlv with the real TT entries */
2641 batadv_tt_tvlv_generate(bat_priv
, bat_priv
->tt
.local_hash
,
2643 batadv_tt_local_valid
, NULL
);
2646 tvlv_tt_data
->flags
= BATADV_TT_RESPONSE
;
2647 tvlv_tt_data
->ttvn
= req_ttvn
;
2650 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
2652 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2653 "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n",
2654 orig_node
->orig
, full_table
? 'F' : '.', req_ttvn
);
2656 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_TX
);
2658 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
2659 req_src
, BATADV_TVLV_TT
, 1, tvlv_tt_data
,
2665 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
2667 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
2669 batadv_orig_node_free_ref(orig_node
);
2671 batadv_hardif_free_ref(primary_if
);
2672 kfree(tvlv_tt_data
);
2673 /* The packet was for this host, so it doesn't need to be re-routed */
2678 * batadv_send_tt_response - send reply to tt request
2679 * @bat_priv: the bat priv with all the soft interface information
2680 * @tt_data: tt data containing the tt request information
2681 * @req_src: mac address of tt request sender
2682 * @req_dst: mac address of tt request recipient
2684 * Returns true if tt request reply was sent, false otherwise.
2686 static bool batadv_send_tt_response(struct batadv_priv
*bat_priv
,
2687 struct batadv_tvlv_tt_data
*tt_data
,
2688 uint8_t *req_src
, uint8_t *req_dst
)
2690 if (batadv_is_my_mac(bat_priv
, req_dst
))
2691 return batadv_send_my_tt_response(bat_priv
, tt_data
, req_src
);
2693 return batadv_send_other_tt_response(bat_priv
, tt_data
,
2697 static void _batadv_tt_update_changes(struct batadv_priv
*bat_priv
,
2698 struct batadv_orig_node
*orig_node
,
2699 struct batadv_tvlv_tt_change
*tt_change
,
2700 uint16_t tt_num_changes
, uint8_t ttvn
)
2705 for (i
= 0; i
< tt_num_changes
; i
++) {
2706 if ((tt_change
+ i
)->flags
& BATADV_TT_CLIENT_DEL
) {
2707 roams
= (tt_change
+ i
)->flags
& BATADV_TT_CLIENT_ROAM
;
2708 batadv_tt_global_del(bat_priv
, orig_node
,
2709 (tt_change
+ i
)->addr
,
2710 ntohs((tt_change
+ i
)->vid
),
2711 "tt removed by changes",
2714 if (!batadv_tt_global_add(bat_priv
, orig_node
,
2715 (tt_change
+ i
)->addr
,
2716 ntohs((tt_change
+ i
)->vid
),
2717 (tt_change
+ i
)->flags
, ttvn
))
2718 /* In case of problem while storing a
2719 * global_entry, we stop the updating
2720 * procedure without committing the
2721 * ttvn change. This will avoid to send
2722 * corrupted data on tt_request
2727 orig_node
->tt_initialised
= true;
2730 static void batadv_tt_fill_gtable(struct batadv_priv
*bat_priv
,
2731 struct batadv_tvlv_tt_change
*tt_change
,
2732 uint8_t ttvn
, uint8_t *resp_src
,
2733 uint16_t num_entries
)
2735 struct batadv_orig_node
*orig_node
;
2737 orig_node
= batadv_orig_hash_find(bat_priv
, resp_src
);
2741 /* Purge the old table first.. */
2742 batadv_tt_global_del_orig(bat_priv
, orig_node
, -1,
2743 "Received full table");
2745 _batadv_tt_update_changes(bat_priv
, orig_node
, tt_change
, num_entries
,
2748 spin_lock_bh(&orig_node
->tt_buff_lock
);
2749 kfree(orig_node
->tt_buff
);
2750 orig_node
->tt_buff_len
= 0;
2751 orig_node
->tt_buff
= NULL
;
2752 spin_unlock_bh(&orig_node
->tt_buff_lock
);
2754 atomic_set(&orig_node
->last_ttvn
, ttvn
);
2758 batadv_orig_node_free_ref(orig_node
);
2761 static void batadv_tt_update_changes(struct batadv_priv
*bat_priv
,
2762 struct batadv_orig_node
*orig_node
,
2763 uint16_t tt_num_changes
, uint8_t ttvn
,
2764 struct batadv_tvlv_tt_change
*tt_change
)
2766 _batadv_tt_update_changes(bat_priv
, orig_node
, tt_change
,
2767 tt_num_changes
, ttvn
);
2769 batadv_tt_save_orig_buffer(bat_priv
, orig_node
, tt_change
,
2770 batadv_tt_len(tt_num_changes
));
2771 atomic_set(&orig_node
->last_ttvn
, ttvn
);
2775 * batadv_is_my_client - check if a client is served by the local node
2776 * @bat_priv: the bat priv with all the soft interface information
2777 * @addr: the mac adress of the client to check
2778 * @vid: VLAN identifier
2780 * Returns true if the client is served by this node, false otherwise.
2782 bool batadv_is_my_client(struct batadv_priv
*bat_priv
, const uint8_t *addr
,
2785 struct batadv_tt_local_entry
*tt_local_entry
;
2788 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
2789 if (!tt_local_entry
)
2791 /* Check if the client has been logically deleted (but is kept for
2792 * consistency purpose)
2794 if ((tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
) ||
2795 (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
))
2800 batadv_tt_local_entry_free_ref(tt_local_entry
);
2805 * batadv_handle_tt_response - process incoming tt reply
2806 * @bat_priv: the bat priv with all the soft interface information
2807 * @tt_data: tt data containing the tt request information
2808 * @resp_src: mac address of tt reply sender
2809 * @num_entries: number of tt change entries appended to the tt data
2811 static void batadv_handle_tt_response(struct batadv_priv
*bat_priv
,
2812 struct batadv_tvlv_tt_data
*tt_data
,
2813 uint8_t *resp_src
, uint16_t num_entries
)
2815 struct batadv_tt_req_node
*node
, *safe
;
2816 struct batadv_orig_node
*orig_node
= NULL
;
2817 struct batadv_tvlv_tt_change
*tt_change
;
2818 uint8_t *tvlv_ptr
= (uint8_t *)tt_data
;
2819 uint16_t change_offset
;
2821 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2822 "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
2823 resp_src
, tt_data
->ttvn
, num_entries
,
2824 (tt_data
->flags
& BATADV_TT_FULL_TABLE
? 'F' : '.'));
2826 orig_node
= batadv_orig_hash_find(bat_priv
, resp_src
);
2830 spin_lock_bh(&orig_node
->tt_lock
);
2832 change_offset
= sizeof(struct batadv_tvlv_tt_vlan_data
);
2833 change_offset
*= ntohs(tt_data
->num_vlan
);
2834 change_offset
+= sizeof(*tt_data
);
2835 tvlv_ptr
+= change_offset
;
2837 tt_change
= (struct batadv_tvlv_tt_change
*)tvlv_ptr
;
2838 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
) {
2839 batadv_tt_fill_gtable(bat_priv
, tt_change
, tt_data
->ttvn
,
2840 resp_src
, num_entries
);
2842 batadv_tt_update_changes(bat_priv
, orig_node
, num_entries
,
2843 tt_data
->ttvn
, tt_change
);
2846 /* Recalculate the CRC for this orig_node and store it */
2847 batadv_tt_global_update_crc(bat_priv
, orig_node
);
2849 spin_unlock_bh(&orig_node
->tt_lock
);
2851 /* Delete the tt_req_node from pending tt_requests list */
2852 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2853 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
2854 if (!batadv_compare_eth(node
->addr
, resp_src
))
2856 list_del(&node
->list
);
2860 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2863 batadv_orig_node_free_ref(orig_node
);
2866 static void batadv_tt_roam_list_free(struct batadv_priv
*bat_priv
)
2868 struct batadv_tt_roam_node
*node
, *safe
;
2870 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
2872 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.roam_list
, list
) {
2873 list_del(&node
->list
);
2877 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
2880 static void batadv_tt_roam_purge(struct batadv_priv
*bat_priv
)
2882 struct batadv_tt_roam_node
*node
, *safe
;
2884 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
2885 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.roam_list
, list
) {
2886 if (!batadv_has_timed_out(node
->first_time
,
2887 BATADV_ROAMING_MAX_TIME
))
2890 list_del(&node
->list
);
2893 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
2896 /* This function checks whether the client already reached the
2897 * maximum number of possible roaming phases. In this case the ROAMING_ADV
2900 * returns true if the ROAMING_ADV can be sent, false otherwise
2902 static bool batadv_tt_check_roam_count(struct batadv_priv
*bat_priv
,
2905 struct batadv_tt_roam_node
*tt_roam_node
;
2908 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
2909 /* The new tt_req will be issued only if I'm not waiting for a
2910 * reply from the same orig_node yet
2912 list_for_each_entry(tt_roam_node
, &bat_priv
->tt
.roam_list
, list
) {
2913 if (!batadv_compare_eth(tt_roam_node
->addr
, client
))
2916 if (batadv_has_timed_out(tt_roam_node
->first_time
,
2917 BATADV_ROAMING_MAX_TIME
))
2920 if (!batadv_atomic_dec_not_zero(&tt_roam_node
->counter
))
2921 /* Sorry, you roamed too many times! */
2928 tt_roam_node
= kmalloc(sizeof(*tt_roam_node
), GFP_ATOMIC
);
2932 tt_roam_node
->first_time
= jiffies
;
2933 atomic_set(&tt_roam_node
->counter
,
2934 BATADV_ROAMING_MAX_COUNT
- 1);
2935 memcpy(tt_roam_node
->addr
, client
, ETH_ALEN
);
2937 list_add(&tt_roam_node
->list
, &bat_priv
->tt
.roam_list
);
2942 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
2947 * batadv_send_roam_adv - send a roaming advertisement message
2948 * @bat_priv: the bat priv with all the soft interface information
2949 * @client: mac address of the roaming client
2950 * @vid: VLAN identifier
2951 * @orig_node: message destination
2953 * Send a ROAMING_ADV message to the node which was previously serving this
2954 * client. This is done to inform the node that from now on all traffic destined
2955 * for this particular roamed client has to be forwarded to the sender of the
2958 static void batadv_send_roam_adv(struct batadv_priv
*bat_priv
, uint8_t *client
,
2960 struct batadv_orig_node
*orig_node
)
2962 struct batadv_hard_iface
*primary_if
;
2963 struct batadv_tvlv_roam_adv tvlv_roam
;
2965 primary_if
= batadv_primary_if_get_selected(bat_priv
);
2969 /* before going on we have to check whether the client has
2970 * already roamed to us too many times
2972 if (!batadv_tt_check_roam_count(bat_priv
, client
))
2975 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2976 "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n",
2977 orig_node
->orig
, client
, BATADV_PRINT_VID(vid
));
2979 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_ROAM_ADV_TX
);
2981 memcpy(tvlv_roam
.client
, client
, sizeof(tvlv_roam
.client
));
2982 tvlv_roam
.vid
= htons(vid
);
2984 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
2985 orig_node
->orig
, BATADV_TVLV_ROAM
, 1,
2986 &tvlv_roam
, sizeof(tvlv_roam
));
2990 batadv_hardif_free_ref(primary_if
);
2993 static void batadv_tt_purge(struct work_struct
*work
)
2995 struct delayed_work
*delayed_work
;
2996 struct batadv_priv_tt
*priv_tt
;
2997 struct batadv_priv
*bat_priv
;
2999 delayed_work
= container_of(work
, struct delayed_work
, work
);
3000 priv_tt
= container_of(delayed_work
, struct batadv_priv_tt
, work
);
3001 bat_priv
= container_of(priv_tt
, struct batadv_priv
, tt
);
3003 batadv_tt_local_purge(bat_priv
, BATADV_TT_LOCAL_TIMEOUT
);
3004 batadv_tt_global_purge(bat_priv
);
3005 batadv_tt_req_purge(bat_priv
);
3006 batadv_tt_roam_purge(bat_priv
);
3008 queue_delayed_work(batadv_event_workqueue
, &bat_priv
->tt
.work
,
3009 msecs_to_jiffies(BATADV_TT_WORK_PERIOD
));
3012 void batadv_tt_free(struct batadv_priv
*bat_priv
)
3014 batadv_tvlv_container_unregister(bat_priv
, BATADV_TVLV_TT
, 1);
3015 batadv_tvlv_handler_unregister(bat_priv
, BATADV_TVLV_TT
, 1);
3017 cancel_delayed_work_sync(&bat_priv
->tt
.work
);
3019 batadv_tt_local_table_free(bat_priv
);
3020 batadv_tt_global_table_free(bat_priv
);
3021 batadv_tt_req_list_free(bat_priv
);
3022 batadv_tt_changes_list_free(bat_priv
);
3023 batadv_tt_roam_list_free(bat_priv
);
3025 kfree(bat_priv
->tt
.last_changeset
);
3029 * batadv_tt_local_set_flags - set or unset the specified flags on the local
3030 * table and possibly count them in the TT size
3031 * @bat_priv: the bat priv with all the soft interface information
3032 * @flags: the flag to switch
3033 * @enable: whether to set or unset the flag
3034 * @count: whether to increase the TT size by the number of changed entries
3036 static void batadv_tt_local_set_flags(struct batadv_priv
*bat_priv
,
3037 uint16_t flags
, bool enable
, bool count
)
3039 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
3040 struct batadv_tt_common_entry
*tt_common_entry
;
3041 uint16_t changed_num
= 0;
3042 struct hlist_head
*head
;
3048 for (i
= 0; i
< hash
->size
; i
++) {
3049 head
= &hash
->table
[i
];
3052 hlist_for_each_entry_rcu(tt_common_entry
,
3055 if ((tt_common_entry
->flags
& flags
) == flags
)
3057 tt_common_entry
->flags
|= flags
;
3059 if (!(tt_common_entry
->flags
& flags
))
3061 tt_common_entry
->flags
&= ~flags
;
3068 batadv_tt_local_size_inc(bat_priv
,
3069 tt_common_entry
->vid
);
3075 /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */
3076 static void batadv_tt_local_purge_pending_clients(struct batadv_priv
*bat_priv
)
3078 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
3079 struct batadv_tt_common_entry
*tt_common
;
3080 struct batadv_tt_local_entry
*tt_local
;
3081 struct hlist_node
*node_tmp
;
3082 struct hlist_head
*head
;
3083 spinlock_t
*list_lock
; /* protects write access to the hash lists */
3089 for (i
= 0; i
< hash
->size
; i
++) {
3090 head
= &hash
->table
[i
];
3091 list_lock
= &hash
->list_locks
[i
];
3093 spin_lock_bh(list_lock
);
3094 hlist_for_each_entry_safe(tt_common
, node_tmp
, head
,
3096 if (!(tt_common
->flags
& BATADV_TT_CLIENT_PENDING
))
3099 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3100 "Deleting local tt entry (%pM, vid: %d): pending\n",
3102 BATADV_PRINT_VID(tt_common
->vid
));
3104 batadv_tt_local_size_dec(bat_priv
, tt_common
->vid
);
3105 hlist_del_rcu(&tt_common
->hash_entry
);
3106 tt_local
= container_of(tt_common
,
3107 struct batadv_tt_local_entry
,
3109 batadv_tt_local_entry_free_ref(tt_local
);
3111 spin_unlock_bh(list_lock
);
3116 * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes
3117 * which have been queued in the time since the last commit
3118 * @bat_priv: the bat priv with all the soft interface information
3120 * Caller must hold tt->commit_lock.
3122 static void batadv_tt_local_commit_changes_nolock(struct batadv_priv
*bat_priv
)
3124 if (atomic_read(&bat_priv
->tt
.local_changes
) < 1) {
3125 if (!batadv_atomic_dec_not_zero(&bat_priv
->tt
.ogm_append_cnt
))
3126 batadv_tt_tvlv_container_update(bat_priv
);
3130 batadv_tt_local_set_flags(bat_priv
, BATADV_TT_CLIENT_NEW
, false, true);
3132 batadv_tt_local_purge_pending_clients(bat_priv
);
3133 batadv_tt_local_update_crc(bat_priv
);
3135 /* Increment the TTVN only once per OGM interval */
3136 atomic_inc(&bat_priv
->tt
.vn
);
3137 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3138 "Local changes committed, updating to ttvn %u\n",
3139 (uint8_t)atomic_read(&bat_priv
->tt
.vn
));
3141 /* reset the sending counter */
3142 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, BATADV_TT_OGM_APPEND_MAX
);
3143 batadv_tt_tvlv_container_update(bat_priv
);
3147 * batadv_tt_local_commit_changes - commit all pending local tt changes which
3148 * have been queued in the time since the last commit
3149 * @bat_priv: the bat priv with all the soft interface information
3151 void batadv_tt_local_commit_changes(struct batadv_priv
*bat_priv
)
3153 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
3154 batadv_tt_local_commit_changes_nolock(bat_priv
);
3155 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
3158 bool batadv_is_ap_isolated(struct batadv_priv
*bat_priv
, uint8_t *src
,
3159 uint8_t *dst
, unsigned short vid
)
3161 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
3162 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
3163 struct batadv_softif_vlan
*vlan
;
3166 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
3167 if (!vlan
|| !atomic_read(&vlan
->ap_isolation
))
3170 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, dst
, vid
);
3171 if (!tt_local_entry
)
3174 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, src
, vid
);
3175 if (!tt_global_entry
)
3178 if (!_batadv_is_ap_isolated(tt_local_entry
, tt_global_entry
))
3185 batadv_softif_vlan_free_ref(vlan
);
3186 if (tt_global_entry
)
3187 batadv_tt_global_entry_free_ref(tt_global_entry
);
3189 batadv_tt_local_entry_free_ref(tt_local_entry
);
3194 * batadv_tt_update_orig - update global translation table with new tt
3195 * information received via ogms
3196 * @bat_priv: the bat priv with all the soft interface information
3197 * @orig: the orig_node of the ogm
3198 * @tt_vlan: pointer to the first tvlv VLAN entry
3199 * @tt_num_vlan: number of tvlv VLAN entries
3200 * @tt_change: pointer to the first entry in the TT buffer
3201 * @tt_num_changes: number of tt changes inside the tt buffer
3202 * @ttvn: translation table version number of this changeset
3203 * @tt_crc: crc32 checksum of orig node's translation table
3205 static void batadv_tt_update_orig(struct batadv_priv
*bat_priv
,
3206 struct batadv_orig_node
*orig_node
,
3207 const void *tt_buff
, uint16_t tt_num_vlan
,
3208 struct batadv_tvlv_tt_change
*tt_change
,
3209 uint16_t tt_num_changes
, uint8_t ttvn
)
3211 uint8_t orig_ttvn
= (uint8_t)atomic_read(&orig_node
->last_ttvn
);
3212 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
3213 bool full_table
= true;
3215 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)tt_buff
;
3216 /* orig table not initialised AND first diff is in the OGM OR the ttvn
3217 * increased by one -> we can apply the attached changes
3219 if ((!orig_node
->tt_initialised
&& ttvn
== 1) ||
3220 ttvn
- orig_ttvn
== 1) {
3221 /* the OGM could not contain the changes due to their size or
3222 * because they have already been sent BATADV_TT_OGM_APPEND_MAX
3224 * In this case send a tt request
3226 if (!tt_num_changes
) {
3231 spin_lock_bh(&orig_node
->tt_lock
);
3233 batadv_tt_update_changes(bat_priv
, orig_node
, tt_num_changes
,
3236 /* Even if we received the precomputed crc with the OGM, we
3237 * prefer to recompute it to spot any possible inconsistency
3238 * in the global table
3240 batadv_tt_global_update_crc(bat_priv
, orig_node
);
3242 spin_unlock_bh(&orig_node
->tt_lock
);
3244 /* The ttvn alone is not enough to guarantee consistency
3245 * because a single value could represent different states
3246 * (due to the wrap around). Thus a node has to check whether
3247 * the resulting table (after applying the changes) is still
3248 * consistent or not. E.g. a node could disconnect while its
3249 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
3250 * checking the CRC value is mandatory to detect the
3253 if (!batadv_tt_global_check_crc(orig_node
, tt_vlan
,
3257 /* if we missed more than one change or our tables are not
3258 * in sync anymore -> request fresh tt data
3260 if (!orig_node
->tt_initialised
|| ttvn
!= orig_ttvn
||
3261 !batadv_tt_global_check_crc(orig_node
, tt_vlan
,
3264 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3265 "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n",
3266 orig_node
->orig
, ttvn
, orig_ttvn
,
3268 batadv_send_tt_request(bat_priv
, orig_node
, ttvn
,
3269 tt_vlan
, tt_num_vlan
,
3277 * batadv_tt_global_client_is_roaming - check if a client is marked as roaming
3278 * @bat_priv: the bat priv with all the soft interface information
3279 * @addr: the mac address of the client to check
3280 * @vid: VLAN identifier
3282 * Returns true if we know that the client has moved from its old originator
3283 * to another one. This entry is still kept for consistency purposes and will be
3284 * deleted later by a DEL or because of timeout
3286 bool batadv_tt_global_client_is_roaming(struct batadv_priv
*bat_priv
,
3287 uint8_t *addr
, unsigned short vid
)
3289 struct batadv_tt_global_entry
*tt_global_entry
;
3292 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
3293 if (!tt_global_entry
)
3296 ret
= tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
;
3297 batadv_tt_global_entry_free_ref(tt_global_entry
);
3303 * batadv_tt_local_client_is_roaming - tells whether the client is roaming
3304 * @bat_priv: the bat priv with all the soft interface information
3305 * @addr: the mac address of the local client to query
3306 * @vid: VLAN identifier
3308 * Returns true if the local client is known to be roaming (it is not served by
3309 * this node anymore) or not. If yes, the client is still present in the table
3310 * to keep the latter consistent with the node TTVN
3312 bool batadv_tt_local_client_is_roaming(struct batadv_priv
*bat_priv
,
3313 uint8_t *addr
, unsigned short vid
)
3315 struct batadv_tt_local_entry
*tt_local_entry
;
3318 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
3319 if (!tt_local_entry
)
3322 ret
= tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
;
3323 batadv_tt_local_entry_free_ref(tt_local_entry
);
3328 bool batadv_tt_add_temporary_global_entry(struct batadv_priv
*bat_priv
,
3329 struct batadv_orig_node
*orig_node
,
3330 const unsigned char *addr
,
3335 if (!batadv_tt_global_add(bat_priv
, orig_node
, addr
, vid
,
3336 BATADV_TT_CLIENT_TEMP
,
3337 atomic_read(&orig_node
->last_ttvn
)))
3340 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3341 "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n",
3342 addr
, BATADV_PRINT_VID(vid
), orig_node
->orig
);
3349 * batadv_tt_local_resize_to_mtu - resize the local translation table fit the
3350 * maximum packet size that can be transported through the mesh
3351 * @soft_iface: netdev struct of the mesh interface
3353 * Remove entries older than 'timeout' and half timeout if more entries need
3356 void batadv_tt_local_resize_to_mtu(struct net_device
*soft_iface
)
3358 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
3359 int packet_size_max
= atomic_read(&bat_priv
->packet_size_max
);
3360 int table_size
, timeout
= BATADV_TT_LOCAL_TIMEOUT
/ 2;
3361 bool reduced
= false;
3363 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
3366 table_size
= batadv_tt_local_table_transmit_size(bat_priv
);
3367 if (packet_size_max
>= table_size
)
3370 batadv_tt_local_purge(bat_priv
, timeout
);
3371 batadv_tt_local_purge_pending_clients(bat_priv
);
3375 net_ratelimited_function(batadv_info
, soft_iface
,
3376 "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n",
3380 /* commit these changes immediately, to avoid synchronization problem
3384 batadv_tt_local_commit_changes_nolock(bat_priv
);
3386 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
3390 * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container
3391 * @bat_priv: the bat priv with all the soft interface information
3392 * @orig: the orig_node of the ogm
3393 * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
3394 * @tvlv_value: tvlv buffer containing the gateway data
3395 * @tvlv_value_len: tvlv buffer length
3397 static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv
*bat_priv
,
3398 struct batadv_orig_node
*orig
,
3399 uint8_t flags
, void *tvlv_value
,
3400 uint16_t tvlv_value_len
)
3402 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
3403 struct batadv_tvlv_tt_change
*tt_change
;
3404 struct batadv_tvlv_tt_data
*tt_data
;
3405 uint16_t num_entries
, num_vlan
;
3407 if (tvlv_value_len
< sizeof(*tt_data
))
3410 tt_data
= (struct batadv_tvlv_tt_data
*)tvlv_value
;
3411 tvlv_value_len
-= sizeof(*tt_data
);
3413 num_vlan
= ntohs(tt_data
->num_vlan
);
3415 if (tvlv_value_len
< sizeof(*tt_vlan
) * num_vlan
)
3418 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(tt_data
+ 1);
3419 tt_change
= (struct batadv_tvlv_tt_change
*)(tt_vlan
+ num_vlan
);
3420 tvlv_value_len
-= sizeof(*tt_vlan
) * num_vlan
;
3422 num_entries
= batadv_tt_entries(tvlv_value_len
);
3424 batadv_tt_update_orig(bat_priv
, orig
, tt_vlan
, num_vlan
, tt_change
,
3425 num_entries
, tt_data
->ttvn
);
3429 * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv
3431 * @bat_priv: the bat priv with all the soft interface information
3432 * @src: mac address of tt tvlv sender
3433 * @dst: mac address of tt tvlv recipient
3434 * @tvlv_value: tvlv buffer containing the tt data
3435 * @tvlv_value_len: tvlv buffer length
3437 * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS
3440 static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv
*bat_priv
,
3441 uint8_t *src
, uint8_t *dst
,
3443 uint16_t tvlv_value_len
)
3445 struct batadv_tvlv_tt_data
*tt_data
;
3446 uint16_t tt_vlan_len
, tt_num_entries
;
3450 if (tvlv_value_len
< sizeof(*tt_data
))
3451 return NET_RX_SUCCESS
;
3453 tt_data
= (struct batadv_tvlv_tt_data
*)tvlv_value
;
3454 tvlv_value_len
-= sizeof(*tt_data
);
3456 tt_vlan_len
= sizeof(struct batadv_tvlv_tt_vlan_data
);
3457 tt_vlan_len
*= ntohs(tt_data
->num_vlan
);
3459 if (tvlv_value_len
< tt_vlan_len
)
3460 return NET_RX_SUCCESS
;
3462 tvlv_value_len
-= tt_vlan_len
;
3463 tt_num_entries
= batadv_tt_entries(tvlv_value_len
);
3465 switch (tt_data
->flags
& BATADV_TT_DATA_TYPE_MASK
) {
3466 case BATADV_TT_REQUEST
:
3467 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_REQUEST_RX
);
3469 /* If this node cannot provide a TT response the tt_request is
3472 ret
= batadv_send_tt_response(bat_priv
, tt_data
, src
, dst
);
3474 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
)
3479 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3480 "Routing TT_REQUEST to %pM [%c]\n",
3482 /* tvlv API will re-route the packet */
3486 case BATADV_TT_RESPONSE
:
3487 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_RX
);
3489 if (batadv_is_my_mac(bat_priv
, dst
)) {
3490 batadv_handle_tt_response(bat_priv
, tt_data
,
3491 src
, tt_num_entries
);
3492 return NET_RX_SUCCESS
;
3495 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
)
3500 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3501 "Routing TT_RESPONSE to %pM [%c]\n", dst
, tt_flag
);
3503 /* tvlv API will re-route the packet */
3507 return NET_RX_SUCCESS
;
3511 * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container
3512 * @bat_priv: the bat priv with all the soft interface information
3513 * @src: mac address of tt tvlv sender
3514 * @dst: mac address of tt tvlv recipient
3515 * @tvlv_value: tvlv buffer containing the tt data
3516 * @tvlv_value_len: tvlv buffer length
3518 * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS
3521 static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv
*bat_priv
,
3522 uint8_t *src
, uint8_t *dst
,
3524 uint16_t tvlv_value_len
)
3526 struct batadv_tvlv_roam_adv
*roaming_adv
;
3527 struct batadv_orig_node
*orig_node
= NULL
;
3529 /* If this node is not the intended recipient of the
3530 * roaming advertisement the packet is forwarded
3531 * (the tvlv API will re-route the packet).
3533 if (!batadv_is_my_mac(bat_priv
, dst
))
3536 if (tvlv_value_len
< sizeof(*roaming_adv
))
3539 orig_node
= batadv_orig_hash_find(bat_priv
, src
);
3543 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_ROAM_ADV_RX
);
3544 roaming_adv
= (struct batadv_tvlv_roam_adv
*)tvlv_value
;
3546 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3547 "Received ROAMING_ADV from %pM (client %pM)\n",
3548 src
, roaming_adv
->client
);
3550 batadv_tt_global_add(bat_priv
, orig_node
, roaming_adv
->client
,
3551 ntohs(roaming_adv
->vid
), BATADV_TT_CLIENT_ROAM
,
3552 atomic_read(&orig_node
->last_ttvn
) + 1);
3556 batadv_orig_node_free_ref(orig_node
);
3557 return NET_RX_SUCCESS
;
3561 * batadv_tt_init - initialise the translation table internals
3562 * @bat_priv: the bat priv with all the soft interface information
3564 * Return 0 on success or negative error number in case of failure.
3566 int batadv_tt_init(struct batadv_priv
*bat_priv
)
3570 /* synchronized flags must be remote */
3571 BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK
& BATADV_TT_REMOTE_MASK
));
3573 ret
= batadv_tt_local_init(bat_priv
);
3577 ret
= batadv_tt_global_init(bat_priv
);
3581 batadv_tvlv_handler_register(bat_priv
, batadv_tt_tvlv_ogm_handler_v1
,
3582 batadv_tt_tvlv_unicast_handler_v1
,
3583 BATADV_TVLV_TT
, 1, BATADV_NO_FLAGS
);
3585 batadv_tvlv_handler_register(bat_priv
, NULL
,
3586 batadv_roam_tvlv_unicast_handler_v1
,
3587 BATADV_TVLV_ROAM
, 1, BATADV_NO_FLAGS
);
3589 INIT_DELAYED_WORK(&bat_priv
->tt
.work
, batadv_tt_purge
);
3590 queue_delayed_work(batadv_event_workqueue
, &bat_priv
->tt
.work
,
3591 msecs_to_jiffies(BATADV_TT_WORK_PERIOD
));
3597 * batadv_tt_global_is_isolated - check if a client is marked as isolated
3598 * @bat_priv: the bat priv with all the soft interface information
3599 * @addr: the mac address of the client
3600 * @vid: the identifier of the VLAN where this client is connected
3602 * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false
3605 bool batadv_tt_global_is_isolated(struct batadv_priv
*bat_priv
,
3606 const uint8_t *addr
, unsigned short vid
)
3608 struct batadv_tt_global_entry
*tt
;
3611 tt
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
3615 ret
= tt
->common
.flags
& BATADV_TT_CLIENT_ISOLA
;
3617 batadv_tt_global_entry_free_ref(tt
);