1 /* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
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/>.
21 #include <linux/atomic.h>
22 #include <linux/bitmap.h>
23 #include <linux/bitops.h>
24 #include <linux/bug.h>
25 #include <linux/byteorder/generic.h>
26 #include <linux/cache.h>
27 #include <linux/errno.h>
28 #include <linux/etherdevice.h>
30 #include <linux/if_ether.h>
31 #include <linux/init.h>
32 #include <linux/jiffies.h>
33 #include <linux/list.h>
34 #include <linux/kref.h>
35 #include <linux/lockdep.h>
36 #include <linux/netdevice.h>
37 #include <linux/pkt_sched.h>
38 #include <linux/printk.h>
39 #include <linux/random.h>
40 #include <linux/rculist.h>
41 #include <linux/rcupdate.h>
42 #include <linux/seq_file.h>
43 #include <linux/skbuff.h>
44 #include <linux/slab.h>
45 #include <linux/spinlock.h>
46 #include <linux/stddef.h>
47 #include <linux/string.h>
48 #include <linux/types.h>
49 #include <linux/workqueue.h>
52 #include "hard-interface.h"
54 #include "network-coding.h"
55 #include "originator.h"
59 #include "translation-table.h"
62 * enum batadv_dup_status - duplicate status
63 * @BATADV_NO_DUP: the packet is no duplicate
64 * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for the
66 * @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor
67 * @BATADV_PROTECTED: originator is currently protected (after reboot)
69 enum batadv_dup_status
{
77 * batadv_ring_buffer_set - update the ring buffer with the given value
78 * @lq_recv: pointer to the ring buffer
79 * @lq_index: index to store the value at
80 * @value: value to store in the ring buffer
82 static void batadv_ring_buffer_set(u8 lq_recv
[], u8
*lq_index
, u8 value
)
84 lq_recv
[*lq_index
] = value
;
85 *lq_index
= (*lq_index
+ 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE
;
89 * batadv_ring_buffer_avg - compute the average of all non-zero values stored
90 * in the given ring buffer
91 * @lq_recv: pointer to the ring buffer
93 * Return: computed average value.
95 static u8
batadv_ring_buffer_avg(const u8 lq_recv
[])
104 while (i
< BATADV_TQ_GLOBAL_WINDOW_SIZE
) {
117 return (u8
)(sum
/ count
);
121 * batadv_iv_ogm_orig_free - free the private resources allocated for this
123 * @orig_node: the orig_node for which the resources have to be free'd
125 static void batadv_iv_ogm_orig_free(struct batadv_orig_node
*orig_node
)
127 kfree(orig_node
->bat_iv
.bcast_own
);
128 kfree(orig_node
->bat_iv
.bcast_own_sum
);
132 * batadv_iv_ogm_orig_add_if - change the private structures of the orig_node to
133 * include the new hard-interface
134 * @orig_node: the orig_node that has to be changed
135 * @max_if_num: the current amount of interfaces
137 * Return: 0 on success, a negative error code otherwise.
139 static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node
*orig_node
,
146 spin_lock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
148 old_size
= (max_if_num
- 1) * sizeof(unsigned long) * BATADV_NUM_WORDS
;
149 data_ptr
= kmalloc_array(max_if_num
,
150 BATADV_NUM_WORDS
* sizeof(unsigned long),
155 memcpy(data_ptr
, orig_node
->bat_iv
.bcast_own
, old_size
);
156 kfree(orig_node
->bat_iv
.bcast_own
);
157 orig_node
->bat_iv
.bcast_own
= data_ptr
;
159 data_ptr
= kmalloc_array(max_if_num
, sizeof(u8
), GFP_ATOMIC
);
161 kfree(orig_node
->bat_iv
.bcast_own
);
165 memcpy(data_ptr
, orig_node
->bat_iv
.bcast_own_sum
,
166 (max_if_num
- 1) * sizeof(u8
));
167 kfree(orig_node
->bat_iv
.bcast_own_sum
);
168 orig_node
->bat_iv
.bcast_own_sum
= data_ptr
;
173 spin_unlock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
179 * batadv_iv_ogm_drop_bcast_own_entry - drop section of bcast_own
180 * @orig_node: the orig_node that has to be changed
181 * @max_if_num: the current amount of interfaces
182 * @del_if_num: the index of the interface being removed
185 batadv_iv_ogm_drop_bcast_own_entry(struct batadv_orig_node
*orig_node
,
186 int max_if_num
, int del_if_num
)
192 lockdep_assert_held(&orig_node
->bat_iv
.ogm_cnt_lock
);
194 chunk_size
= sizeof(unsigned long) * BATADV_NUM_WORDS
;
195 data_ptr
= kmalloc_array(max_if_num
, chunk_size
, GFP_ATOMIC
);
197 /* use old buffer when new one could not be allocated */
198 data_ptr
= orig_node
->bat_iv
.bcast_own
;
200 /* copy first part */
201 memmove(data_ptr
, orig_node
->bat_iv
.bcast_own
, del_if_num
* chunk_size
);
203 /* copy second part */
204 if_offset
= (del_if_num
+ 1) * chunk_size
;
205 memmove((char *)data_ptr
+ del_if_num
* chunk_size
,
206 (uint8_t *)orig_node
->bat_iv
.bcast_own
+ if_offset
,
207 (max_if_num
- del_if_num
) * chunk_size
);
209 /* bcast_own was shrunk down in new buffer; free old one */
210 if (orig_node
->bat_iv
.bcast_own
!= data_ptr
) {
211 kfree(orig_node
->bat_iv
.bcast_own
);
212 orig_node
->bat_iv
.bcast_own
= data_ptr
;
217 * batadv_iv_ogm_drop_bcast_own_sum_entry - drop section of bcast_own_sum
218 * @orig_node: the orig_node that has to be changed
219 * @max_if_num: the current amount of interfaces
220 * @del_if_num: the index of the interface being removed
223 batadv_iv_ogm_drop_bcast_own_sum_entry(struct batadv_orig_node
*orig_node
,
224 int max_if_num
, int del_if_num
)
229 lockdep_assert_held(&orig_node
->bat_iv
.ogm_cnt_lock
);
231 data_ptr
= kmalloc_array(max_if_num
, sizeof(u8
), GFP_ATOMIC
);
233 /* use old buffer when new one could not be allocated */
234 data_ptr
= orig_node
->bat_iv
.bcast_own_sum
;
236 memmove(data_ptr
, orig_node
->bat_iv
.bcast_own_sum
,
237 del_if_num
* sizeof(u8
));
239 if_offset
= (del_if_num
+ 1) * sizeof(u8
);
240 memmove((char *)data_ptr
+ del_if_num
* sizeof(u8
),
241 orig_node
->bat_iv
.bcast_own_sum
+ if_offset
,
242 (max_if_num
- del_if_num
) * sizeof(u8
));
244 /* bcast_own_sum was shrunk down in new buffer; free old one */
245 if (orig_node
->bat_iv
.bcast_own_sum
!= data_ptr
) {
246 kfree(orig_node
->bat_iv
.bcast_own_sum
);
247 orig_node
->bat_iv
.bcast_own_sum
= data_ptr
;
252 * batadv_iv_ogm_orig_del_if - change the private structures of the orig_node to
253 * exclude the removed interface
254 * @orig_node: the orig_node that has to be changed
255 * @max_if_num: the current amount of interfaces
256 * @del_if_num: the index of the interface being removed
258 * Return: 0 on success, a negative error code otherwise.
260 static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node
*orig_node
,
261 int max_if_num
, int del_if_num
)
263 spin_lock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
265 if (max_if_num
== 0) {
266 kfree(orig_node
->bat_iv
.bcast_own
);
267 kfree(orig_node
->bat_iv
.bcast_own_sum
);
268 orig_node
->bat_iv
.bcast_own
= NULL
;
269 orig_node
->bat_iv
.bcast_own_sum
= NULL
;
271 batadv_iv_ogm_drop_bcast_own_entry(orig_node
, max_if_num
,
273 batadv_iv_ogm_drop_bcast_own_sum_entry(orig_node
, max_if_num
,
277 spin_unlock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
283 * batadv_iv_ogm_orig_get - retrieve or create (if does not exist) an originator
284 * @bat_priv: the bat priv with all the soft interface information
285 * @addr: mac address of the originator
287 * Return: the originator object corresponding to the passed mac address or NULL
289 * If the object does not exists it is created an initialised.
291 static struct batadv_orig_node
*
292 batadv_iv_ogm_orig_get(struct batadv_priv
*bat_priv
, const u8
*addr
)
294 struct batadv_orig_node
*orig_node
;
295 int size
, hash_added
;
297 orig_node
= batadv_orig_hash_find(bat_priv
, addr
);
301 orig_node
= batadv_orig_node_new(bat_priv
, addr
);
305 spin_lock_init(&orig_node
->bat_iv
.ogm_cnt_lock
);
307 size
= bat_priv
->num_ifaces
* sizeof(unsigned long) * BATADV_NUM_WORDS
;
308 orig_node
->bat_iv
.bcast_own
= kzalloc(size
, GFP_ATOMIC
);
309 if (!orig_node
->bat_iv
.bcast_own
)
312 size
= bat_priv
->num_ifaces
* sizeof(u8
);
313 orig_node
->bat_iv
.bcast_own_sum
= kzalloc(size
, GFP_ATOMIC
);
314 if (!orig_node
->bat_iv
.bcast_own_sum
)
317 hash_added
= batadv_hash_add(bat_priv
->orig_hash
, batadv_compare_orig
,
318 batadv_choose_orig
, orig_node
,
319 &orig_node
->hash_entry
);
326 /* free twice, as batadv_orig_node_new sets refcount to 2 */
327 batadv_orig_node_put(orig_node
);
328 batadv_orig_node_put(orig_node
);
333 static struct batadv_neigh_node
*
334 batadv_iv_ogm_neigh_new(struct batadv_hard_iface
*hard_iface
,
335 const u8
*neigh_addr
,
336 struct batadv_orig_node
*orig_node
,
337 struct batadv_orig_node
*orig_neigh
)
339 struct batadv_neigh_node
*neigh_node
;
341 neigh_node
= batadv_neigh_node_new(orig_node
, hard_iface
, neigh_addr
);
345 neigh_node
->orig_node
= orig_neigh
;
351 static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface
*hard_iface
)
353 struct batadv_ogm_packet
*batadv_ogm_packet
;
354 unsigned char *ogm_buff
;
357 /* randomize initial seqno to avoid collision */
358 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
359 atomic_set(&hard_iface
->bat_iv
.ogm_seqno
, random_seqno
);
361 hard_iface
->bat_iv
.ogm_buff_len
= BATADV_OGM_HLEN
;
362 ogm_buff
= kmalloc(hard_iface
->bat_iv
.ogm_buff_len
, GFP_ATOMIC
);
366 hard_iface
->bat_iv
.ogm_buff
= ogm_buff
;
368 batadv_ogm_packet
= (struct batadv_ogm_packet
*)ogm_buff
;
369 batadv_ogm_packet
->packet_type
= BATADV_IV_OGM
;
370 batadv_ogm_packet
->version
= BATADV_COMPAT_VERSION
;
371 batadv_ogm_packet
->ttl
= 2;
372 batadv_ogm_packet
->flags
= BATADV_NO_FLAGS
;
373 batadv_ogm_packet
->reserved
= 0;
374 batadv_ogm_packet
->tq
= BATADV_TQ_MAX_VALUE
;
379 static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface
*hard_iface
)
381 kfree(hard_iface
->bat_iv
.ogm_buff
);
382 hard_iface
->bat_iv
.ogm_buff
= NULL
;
385 static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface
*hard_iface
)
387 struct batadv_ogm_packet
*batadv_ogm_packet
;
388 unsigned char *ogm_buff
= hard_iface
->bat_iv
.ogm_buff
;
390 batadv_ogm_packet
= (struct batadv_ogm_packet
*)ogm_buff
;
391 ether_addr_copy(batadv_ogm_packet
->orig
,
392 hard_iface
->net_dev
->dev_addr
);
393 ether_addr_copy(batadv_ogm_packet
->prev_sender
,
394 hard_iface
->net_dev
->dev_addr
);
398 batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface
*hard_iface
)
400 struct batadv_ogm_packet
*batadv_ogm_packet
;
401 unsigned char *ogm_buff
= hard_iface
->bat_iv
.ogm_buff
;
403 batadv_ogm_packet
= (struct batadv_ogm_packet
*)ogm_buff
;
404 batadv_ogm_packet
->ttl
= BATADV_TTL
;
407 /* when do we schedule our own ogm to be sent */
409 batadv_iv_ogm_emit_send_time(const struct batadv_priv
*bat_priv
)
413 msecs
= atomic_read(&bat_priv
->orig_interval
) - BATADV_JITTER
;
414 msecs
+= prandom_u32() % (2 * BATADV_JITTER
);
416 return jiffies
+ msecs_to_jiffies(msecs
);
419 /* when do we schedule a ogm packet to be sent */
420 static unsigned long batadv_iv_ogm_fwd_send_time(void)
422 return jiffies
+ msecs_to_jiffies(prandom_u32() % (BATADV_JITTER
/ 2));
425 /* apply hop penalty for a normal link */
426 static u8
batadv_hop_penalty(u8 tq
, const struct batadv_priv
*bat_priv
)
428 int hop_penalty
= atomic_read(&bat_priv
->hop_penalty
);
431 new_tq
= tq
* (BATADV_TQ_MAX_VALUE
- hop_penalty
);
432 new_tq
/= BATADV_TQ_MAX_VALUE
;
438 * batadv_iv_ogm_aggr_packet - checks if there is another OGM attached
439 * @buff_pos: current position in the skb
440 * @packet_len: total length of the skb
441 * @tvlv_len: tvlv length of the previously considered OGM
443 * Return: true if there is enough space for another OGM, false otherwise.
445 static bool batadv_iv_ogm_aggr_packet(int buff_pos
, int packet_len
,
448 int next_buff_pos
= 0;
450 next_buff_pos
+= buff_pos
+ BATADV_OGM_HLEN
;
451 next_buff_pos
+= ntohs(tvlv_len
);
453 return (next_buff_pos
<= packet_len
) &&
454 (next_buff_pos
<= BATADV_MAX_AGGREGATION_BYTES
);
457 /* send a batman ogm to a given interface */
458 static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet
*forw_packet
,
459 struct batadv_hard_iface
*hard_iface
)
461 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
465 struct batadv_ogm_packet
*batadv_ogm_packet
;
469 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
474 packet_pos
= forw_packet
->skb
->data
;
475 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_pos
;
477 /* adjust all flags and log packets */
478 while (batadv_iv_ogm_aggr_packet(buff_pos
, forw_packet
->packet_len
,
479 batadv_ogm_packet
->tvlv_len
)) {
480 /* we might have aggregated direct link packets with an
481 * ordinary base packet
483 if (forw_packet
->direct_link_flags
& BIT(packet_num
) &&
484 forw_packet
->if_incoming
== hard_iface
)
485 batadv_ogm_packet
->flags
|= BATADV_DIRECTLINK
;
487 batadv_ogm_packet
->flags
&= ~BATADV_DIRECTLINK
;
489 if (packet_num
> 0 || !forw_packet
->own
)
490 fwd_str
= "Forwarding";
492 fwd_str
= "Sending own";
494 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
495 "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n",
496 fwd_str
, (packet_num
> 0 ? "aggregated " : ""),
497 batadv_ogm_packet
->orig
,
498 ntohl(batadv_ogm_packet
->seqno
),
499 batadv_ogm_packet
->tq
, batadv_ogm_packet
->ttl
,
500 ((batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
) ?
502 hard_iface
->net_dev
->name
,
503 hard_iface
->net_dev
->dev_addr
);
505 buff_pos
+= BATADV_OGM_HLEN
;
506 buff_pos
+= ntohs(batadv_ogm_packet
->tvlv_len
);
508 packet_pos
= forw_packet
->skb
->data
+ buff_pos
;
509 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_pos
;
512 /* create clone because function is called more than once */
513 skb
= skb_clone(forw_packet
->skb
, GFP_ATOMIC
);
515 batadv_inc_counter(bat_priv
, BATADV_CNT_MGMT_TX
);
516 batadv_add_counter(bat_priv
, BATADV_CNT_MGMT_TX_BYTES
,
517 skb
->len
+ ETH_HLEN
);
518 batadv_send_broadcast_skb(skb
, hard_iface
);
522 /* send a batman ogm packet */
523 static void batadv_iv_ogm_emit(struct batadv_forw_packet
*forw_packet
)
525 struct net_device
*soft_iface
;
526 struct batadv_priv
*bat_priv
;
527 struct batadv_hard_iface
*primary_if
= NULL
;
529 if (!forw_packet
->if_incoming
) {
530 pr_err("Error - can't forward packet: incoming iface not specified\n");
534 soft_iface
= forw_packet
->if_incoming
->soft_iface
;
535 bat_priv
= netdev_priv(soft_iface
);
537 if (WARN_ON(!forw_packet
->if_outgoing
))
540 if (WARN_ON(forw_packet
->if_outgoing
->soft_iface
!= soft_iface
))
543 if (forw_packet
->if_incoming
->if_status
!= BATADV_IF_ACTIVE
)
546 primary_if
= batadv_primary_if_get_selected(bat_priv
);
550 /* only for one specific outgoing interface */
551 batadv_iv_ogm_send_to_if(forw_packet
, forw_packet
->if_outgoing
);
555 batadv_hardif_put(primary_if
);
559 * batadv_iv_ogm_can_aggregate - find out if an OGM can be aggregated on an
560 * existing forward packet
561 * @new_bat_ogm_packet: OGM packet to be aggregated
562 * @bat_priv: the bat priv with all the soft interface information
563 * @packet_len: (total) length of the OGM
564 * @send_time: timestamp (jiffies) when the packet is to be sent
565 * @directlink: true if this is a direct link packet
566 * @if_incoming: interface where the packet was received
567 * @if_outgoing: interface for which the retransmission should be considered
568 * @forw_packet: the forwarded packet which should be checked
570 * Return: true if new_packet can be aggregated with forw_packet
573 batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet
*new_bat_ogm_packet
,
574 struct batadv_priv
*bat_priv
,
575 int packet_len
, unsigned long send_time
,
577 const struct batadv_hard_iface
*if_incoming
,
578 const struct batadv_hard_iface
*if_outgoing
,
579 const struct batadv_forw_packet
*forw_packet
)
581 struct batadv_ogm_packet
*batadv_ogm_packet
;
582 int aggregated_bytes
= forw_packet
->packet_len
+ packet_len
;
583 struct batadv_hard_iface
*primary_if
= NULL
;
585 unsigned long aggregation_end_time
;
587 batadv_ogm_packet
= (struct batadv_ogm_packet
*)forw_packet
->skb
->data
;
588 aggregation_end_time
= send_time
;
589 aggregation_end_time
+= msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS
);
591 /* we can aggregate the current packet to this aggregated packet
594 * - the send time is within our MAX_AGGREGATION_MS time
595 * - the resulting packet wont be bigger than
596 * MAX_AGGREGATION_BYTES
597 * otherwise aggregation is not possible
599 if (!time_before(send_time
, forw_packet
->send_time
) ||
600 !time_after_eq(aggregation_end_time
, forw_packet
->send_time
))
603 if (aggregated_bytes
> BATADV_MAX_AGGREGATION_BYTES
)
606 /* packet is not leaving on the same interface. */
607 if (forw_packet
->if_outgoing
!= if_outgoing
)
610 /* check aggregation compatibility
611 * -> direct link packets are broadcasted on
612 * their interface only
613 * -> aggregate packet if the current packet is
614 * a "global" packet as well as the base
617 primary_if
= batadv_primary_if_get_selected(bat_priv
);
621 /* packets without direct link flag and high TTL
622 * are flooded through the net
625 !(batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
) &&
626 batadv_ogm_packet
->ttl
!= 1 &&
628 /* own packets originating non-primary
629 * interfaces leave only that interface
631 (!forw_packet
->own
||
632 forw_packet
->if_incoming
== primary_if
)) {
637 /* if the incoming packet is sent via this one
638 * interface only - we still can aggregate
641 new_bat_ogm_packet
->ttl
== 1 &&
642 forw_packet
->if_incoming
== if_incoming
&&
644 /* packets from direct neighbors or
645 * own secondary interface packets
646 * (= secondary interface packets in general)
648 (batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
||
650 forw_packet
->if_incoming
!= primary_if
))) {
657 batadv_hardif_put(primary_if
);
662 * batadv_iv_ogm_aggregate_new - create a new aggregated packet and add this
664 * @packet_buff: pointer to the OGM
665 * @packet_len: (total) length of the OGM
666 * @send_time: timestamp (jiffies) when the packet is to be sent
667 * @direct_link: whether this OGM has direct link status
668 * @if_incoming: interface where the packet was received
669 * @if_outgoing: interface for which the retransmission should be considered
670 * @own_packet: true if it is a self-generated ogm
672 static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff
,
673 int packet_len
, unsigned long send_time
,
675 struct batadv_hard_iface
*if_incoming
,
676 struct batadv_hard_iface
*if_outgoing
,
679 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
680 struct batadv_forw_packet
*forw_packet_aggr
;
681 unsigned char *skb_buff
;
682 unsigned int skb_size
;
684 /* own packet should always be scheduled */
686 if (!batadv_atomic_dec_not_zero(&bat_priv
->batman_queue_left
)) {
687 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
688 "batman packet queue full\n");
693 forw_packet_aggr
= kmalloc(sizeof(*forw_packet_aggr
), GFP_ATOMIC
);
694 if (!forw_packet_aggr
)
697 if (atomic_read(&bat_priv
->aggregated_ogms
) &&
698 packet_len
< BATADV_MAX_AGGREGATION_BYTES
)
699 skb_size
= BATADV_MAX_AGGREGATION_BYTES
;
701 skb_size
= packet_len
;
703 skb_size
+= ETH_HLEN
;
705 forw_packet_aggr
->skb
= netdev_alloc_skb_ip_align(NULL
, skb_size
);
706 if (!forw_packet_aggr
->skb
)
707 goto out_free_forw_packet
;
708 forw_packet_aggr
->skb
->priority
= TC_PRIO_CONTROL
;
709 skb_reserve(forw_packet_aggr
->skb
, ETH_HLEN
);
711 skb_buff
= skb_put(forw_packet_aggr
->skb
, packet_len
);
712 forw_packet_aggr
->packet_len
= packet_len
;
713 memcpy(skb_buff
, packet_buff
, packet_len
);
715 kref_get(&if_incoming
->refcount
);
716 kref_get(&if_outgoing
->refcount
);
717 forw_packet_aggr
->own
= own_packet
;
718 forw_packet_aggr
->if_incoming
= if_incoming
;
719 forw_packet_aggr
->if_outgoing
= if_outgoing
;
720 forw_packet_aggr
->num_packets
= 0;
721 forw_packet_aggr
->direct_link_flags
= BATADV_NO_FLAGS
;
722 forw_packet_aggr
->send_time
= send_time
;
724 /* save packet direct link flag status */
726 forw_packet_aggr
->direct_link_flags
|= 1;
728 /* add new packet to packet list */
729 spin_lock_bh(&bat_priv
->forw_bat_list_lock
);
730 hlist_add_head(&forw_packet_aggr
->list
, &bat_priv
->forw_bat_list
);
731 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
733 /* start timer for this packet */
734 INIT_DELAYED_WORK(&forw_packet_aggr
->delayed_work
,
735 batadv_send_outstanding_bat_ogm_packet
);
736 queue_delayed_work(batadv_event_workqueue
,
737 &forw_packet_aggr
->delayed_work
,
738 send_time
- jiffies
);
741 out_free_forw_packet
:
742 kfree(forw_packet_aggr
);
745 atomic_inc(&bat_priv
->batman_queue_left
);
748 /* aggregate a new packet into the existing ogm packet */
749 static void batadv_iv_ogm_aggregate(struct batadv_forw_packet
*forw_packet_aggr
,
750 const unsigned char *packet_buff
,
751 int packet_len
, bool direct_link
)
753 unsigned char *skb_buff
;
754 unsigned long new_direct_link_flag
;
756 skb_buff
= skb_put(forw_packet_aggr
->skb
, packet_len
);
757 memcpy(skb_buff
, packet_buff
, packet_len
);
758 forw_packet_aggr
->packet_len
+= packet_len
;
759 forw_packet_aggr
->num_packets
++;
761 /* save packet direct link flag status */
763 new_direct_link_flag
= BIT(forw_packet_aggr
->num_packets
);
764 forw_packet_aggr
->direct_link_flags
|= new_direct_link_flag
;
769 * batadv_iv_ogm_queue_add - queue up an OGM for transmission
770 * @bat_priv: the bat priv with all the soft interface information
771 * @packet_buff: pointer to the OGM
772 * @packet_len: (total) length of the OGM
773 * @if_incoming: interface where the packet was received
774 * @if_outgoing: interface for which the retransmission should be considered
775 * @own_packet: true if it is a self-generated ogm
776 * @send_time: timestamp (jiffies) when the packet is to be sent
778 static void batadv_iv_ogm_queue_add(struct batadv_priv
*bat_priv
,
779 unsigned char *packet_buff
,
781 struct batadv_hard_iface
*if_incoming
,
782 struct batadv_hard_iface
*if_outgoing
,
783 int own_packet
, unsigned long send_time
)
785 /* _aggr -> pointer to the packet we want to aggregate with
786 * _pos -> pointer to the position in the queue
788 struct batadv_forw_packet
*forw_packet_aggr
= NULL
;
789 struct batadv_forw_packet
*forw_packet_pos
= NULL
;
790 struct batadv_ogm_packet
*batadv_ogm_packet
;
792 unsigned long max_aggregation_jiffies
;
794 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_buff
;
795 direct_link
= !!(batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
);
796 max_aggregation_jiffies
= msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS
);
798 /* find position for the packet in the forward queue */
799 spin_lock_bh(&bat_priv
->forw_bat_list_lock
);
800 /* own packets are not to be aggregated */
801 if (atomic_read(&bat_priv
->aggregated_ogms
) && !own_packet
) {
802 hlist_for_each_entry(forw_packet_pos
,
803 &bat_priv
->forw_bat_list
, list
) {
804 if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet
,
805 bat_priv
, packet_len
,
806 send_time
, direct_link
,
810 forw_packet_aggr
= forw_packet_pos
;
816 /* nothing to aggregate with - either aggregation disabled or no
817 * suitable aggregation packet found
819 if (!forw_packet_aggr
) {
820 /* the following section can run without the lock */
821 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
823 /* if we could not aggregate this packet with one of the others
824 * we hold it back for a while, so that it might be aggregated
827 if (!own_packet
&& atomic_read(&bat_priv
->aggregated_ogms
))
828 send_time
+= max_aggregation_jiffies
;
830 batadv_iv_ogm_aggregate_new(packet_buff
, packet_len
,
831 send_time
, direct_link
,
832 if_incoming
, if_outgoing
,
835 batadv_iv_ogm_aggregate(forw_packet_aggr
, packet_buff
,
836 packet_len
, direct_link
);
837 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
841 static void batadv_iv_ogm_forward(struct batadv_orig_node
*orig_node
,
842 const struct ethhdr
*ethhdr
,
843 struct batadv_ogm_packet
*batadv_ogm_packet
,
844 bool is_single_hop_neigh
,
845 bool is_from_best_next_hop
,
846 struct batadv_hard_iface
*if_incoming
,
847 struct batadv_hard_iface
*if_outgoing
)
849 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
852 if (batadv_ogm_packet
->ttl
<= 1) {
853 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
, "ttl exceeded\n");
857 if (!is_from_best_next_hop
) {
858 /* Mark the forwarded packet when it is not coming from our
859 * best next hop. We still need to forward the packet for our
860 * neighbor link quality detection to work in case the packet
861 * originated from a single hop neighbor. Otherwise we can
862 * simply drop the ogm.
864 if (is_single_hop_neigh
)
865 batadv_ogm_packet
->flags
|= BATADV_NOT_BEST_NEXT_HOP
;
870 tvlv_len
= ntohs(batadv_ogm_packet
->tvlv_len
);
872 batadv_ogm_packet
->ttl
--;
873 ether_addr_copy(batadv_ogm_packet
->prev_sender
, ethhdr
->h_source
);
875 /* apply hop penalty */
876 batadv_ogm_packet
->tq
= batadv_hop_penalty(batadv_ogm_packet
->tq
,
879 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
880 "Forwarding packet: tq: %i, ttl: %i\n",
881 batadv_ogm_packet
->tq
, batadv_ogm_packet
->ttl
);
883 if (is_single_hop_neigh
)
884 batadv_ogm_packet
->flags
|= BATADV_DIRECTLINK
;
886 batadv_ogm_packet
->flags
&= ~BATADV_DIRECTLINK
;
888 batadv_iv_ogm_queue_add(bat_priv
, (unsigned char *)batadv_ogm_packet
,
889 BATADV_OGM_HLEN
+ tvlv_len
,
890 if_incoming
, if_outgoing
, 0,
891 batadv_iv_ogm_fwd_send_time());
895 * batadv_iv_ogm_slide_own_bcast_window - bitshift own OGM broadcast windows for
896 * the given interface
897 * @hard_iface: the interface for which the windows have to be shifted
900 batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface
*hard_iface
)
902 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
903 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
904 struct hlist_head
*head
;
905 struct batadv_orig_node
*orig_node
;
912 for (i
= 0; i
< hash
->size
; i
++) {
913 head
= &hash
->table
[i
];
916 hlist_for_each_entry_rcu(orig_node
, head
, hash_entry
) {
917 spin_lock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
918 word_index
= hard_iface
->if_num
* BATADV_NUM_WORDS
;
919 word
= &orig_node
->bat_iv
.bcast_own
[word_index
];
921 batadv_bit_get_packet(bat_priv
, word
, 1, 0);
922 if_num
= hard_iface
->if_num
;
923 w
= &orig_node
->bat_iv
.bcast_own_sum
[if_num
];
924 *w
= bitmap_weight(word
, BATADV_TQ_LOCAL_WINDOW_SIZE
);
925 spin_unlock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
931 static void batadv_iv_ogm_schedule(struct batadv_hard_iface
*hard_iface
)
933 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
934 unsigned char **ogm_buff
= &hard_iface
->bat_iv
.ogm_buff
;
935 struct batadv_ogm_packet
*batadv_ogm_packet
;
936 struct batadv_hard_iface
*primary_if
, *tmp_hard_iface
;
937 int *ogm_buff_len
= &hard_iface
->bat_iv
.ogm_buff_len
;
940 unsigned long send_time
;
942 primary_if
= batadv_primary_if_get_selected(bat_priv
);
944 if (hard_iface
== primary_if
) {
945 /* tt changes have to be committed before the tvlv data is
946 * appended as it may alter the tt tvlv container
948 batadv_tt_local_commit_changes(bat_priv
);
949 tvlv_len
= batadv_tvlv_container_ogm_append(bat_priv
, ogm_buff
,
954 batadv_ogm_packet
= (struct batadv_ogm_packet
*)(*ogm_buff
);
955 batadv_ogm_packet
->tvlv_len
= htons(tvlv_len
);
957 /* change sequence number to network order */
958 seqno
= (u32
)atomic_read(&hard_iface
->bat_iv
.ogm_seqno
);
959 batadv_ogm_packet
->seqno
= htonl(seqno
);
960 atomic_inc(&hard_iface
->bat_iv
.ogm_seqno
);
962 batadv_iv_ogm_slide_own_bcast_window(hard_iface
);
964 send_time
= batadv_iv_ogm_emit_send_time(bat_priv
);
966 if (hard_iface
!= primary_if
) {
967 /* OGMs from secondary interfaces are only scheduled on their
968 * respective interfaces.
970 batadv_iv_ogm_queue_add(bat_priv
, *ogm_buff
, *ogm_buff_len
,
971 hard_iface
, hard_iface
, 1, send_time
);
975 /* OGMs from primary interfaces are scheduled on all
979 list_for_each_entry_rcu(tmp_hard_iface
, &batadv_hardif_list
, list
) {
980 if (tmp_hard_iface
->soft_iface
!= hard_iface
->soft_iface
)
983 if (!kref_get_unless_zero(&tmp_hard_iface
->refcount
))
986 batadv_iv_ogm_queue_add(bat_priv
, *ogm_buff
,
987 *ogm_buff_len
, hard_iface
,
988 tmp_hard_iface
, 1, send_time
);
990 batadv_hardif_put(tmp_hard_iface
);
996 batadv_hardif_put(primary_if
);
1000 * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an
1002 * @bat_priv: the bat priv with all the soft interface information
1003 * @orig_node: the orig node who originally emitted the ogm packet
1004 * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node
1005 * @ethhdr: Ethernet header of the OGM
1006 * @batadv_ogm_packet: the ogm packet
1007 * @if_incoming: interface where the packet was received
1008 * @if_outgoing: interface for which the retransmission should be considered
1009 * @dup_status: the duplicate status of this ogm packet.
1012 batadv_iv_ogm_orig_update(struct batadv_priv
*bat_priv
,
1013 struct batadv_orig_node
*orig_node
,
1014 struct batadv_orig_ifinfo
*orig_ifinfo
,
1015 const struct ethhdr
*ethhdr
,
1016 const struct batadv_ogm_packet
*batadv_ogm_packet
,
1017 struct batadv_hard_iface
*if_incoming
,
1018 struct batadv_hard_iface
*if_outgoing
,
1019 enum batadv_dup_status dup_status
)
1021 struct batadv_neigh_ifinfo
*neigh_ifinfo
= NULL
;
1022 struct batadv_neigh_ifinfo
*router_ifinfo
= NULL
;
1023 struct batadv_neigh_node
*neigh_node
= NULL
;
1024 struct batadv_neigh_node
*tmp_neigh_node
= NULL
;
1025 struct batadv_neigh_node
*router
= NULL
;
1026 struct batadv_orig_node
*orig_node_tmp
;
1028 u8 sum_orig
, sum_neigh
;
1032 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1033 "update_originator(): Searching and updating originator entry of received packet\n");
1036 hlist_for_each_entry_rcu(tmp_neigh_node
,
1037 &orig_node
->neigh_list
, list
) {
1038 neigh_addr
= tmp_neigh_node
->addr
;
1039 if (batadv_compare_eth(neigh_addr
, ethhdr
->h_source
) &&
1040 tmp_neigh_node
->if_incoming
== if_incoming
&&
1041 kref_get_unless_zero(&tmp_neigh_node
->refcount
)) {
1042 if (WARN(neigh_node
, "too many matching neigh_nodes"))
1043 batadv_neigh_node_put(neigh_node
);
1044 neigh_node
= tmp_neigh_node
;
1048 if (dup_status
!= BATADV_NO_DUP
)
1051 /* only update the entry for this outgoing interface */
1052 neigh_ifinfo
= batadv_neigh_ifinfo_get(tmp_neigh_node
,
1057 spin_lock_bh(&tmp_neigh_node
->ifinfo_lock
);
1058 batadv_ring_buffer_set(neigh_ifinfo
->bat_iv
.tq_recv
,
1059 &neigh_ifinfo
->bat_iv
.tq_index
, 0);
1060 tq_avg
= batadv_ring_buffer_avg(neigh_ifinfo
->bat_iv
.tq_recv
);
1061 neigh_ifinfo
->bat_iv
.tq_avg
= tq_avg
;
1062 spin_unlock_bh(&tmp_neigh_node
->ifinfo_lock
);
1064 batadv_neigh_ifinfo_put(neigh_ifinfo
);
1065 neigh_ifinfo
= NULL
;
1069 struct batadv_orig_node
*orig_tmp
;
1071 orig_tmp
= batadv_iv_ogm_orig_get(bat_priv
, ethhdr
->h_source
);
1075 neigh_node
= batadv_iv_ogm_neigh_new(if_incoming
,
1077 orig_node
, orig_tmp
);
1079 batadv_orig_node_put(orig_tmp
);
1083 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1084 "Updating existing last-hop neighbor of originator\n");
1088 neigh_ifinfo
= batadv_neigh_ifinfo_new(neigh_node
, if_outgoing
);
1092 neigh_node
->last_seen
= jiffies
;
1094 spin_lock_bh(&neigh_node
->ifinfo_lock
);
1095 batadv_ring_buffer_set(neigh_ifinfo
->bat_iv
.tq_recv
,
1096 &neigh_ifinfo
->bat_iv
.tq_index
,
1097 batadv_ogm_packet
->tq
);
1098 tq_avg
= batadv_ring_buffer_avg(neigh_ifinfo
->bat_iv
.tq_recv
);
1099 neigh_ifinfo
->bat_iv
.tq_avg
= tq_avg
;
1100 spin_unlock_bh(&neigh_node
->ifinfo_lock
);
1102 if (dup_status
== BATADV_NO_DUP
) {
1103 orig_ifinfo
->last_ttl
= batadv_ogm_packet
->ttl
;
1104 neigh_ifinfo
->last_ttl
= batadv_ogm_packet
->ttl
;
1107 /* if this neighbor already is our next hop there is nothing
1110 router
= batadv_orig_router_get(orig_node
, if_outgoing
);
1111 if (router
== neigh_node
)
1115 router_ifinfo
= batadv_neigh_ifinfo_get(router
, if_outgoing
);
1119 /* if this neighbor does not offer a better TQ we won't
1122 if (router_ifinfo
->bat_iv
.tq_avg
> neigh_ifinfo
->bat_iv
.tq_avg
)
1126 /* if the TQ is the same and the link not more symmetric we
1127 * won't consider it either
1129 if (router_ifinfo
&&
1130 neigh_ifinfo
->bat_iv
.tq_avg
== router_ifinfo
->bat_iv
.tq_avg
) {
1131 orig_node_tmp
= router
->orig_node
;
1132 spin_lock_bh(&orig_node_tmp
->bat_iv
.ogm_cnt_lock
);
1133 if_num
= router
->if_incoming
->if_num
;
1134 sum_orig
= orig_node_tmp
->bat_iv
.bcast_own_sum
[if_num
];
1135 spin_unlock_bh(&orig_node_tmp
->bat_iv
.ogm_cnt_lock
);
1137 orig_node_tmp
= neigh_node
->orig_node
;
1138 spin_lock_bh(&orig_node_tmp
->bat_iv
.ogm_cnt_lock
);
1139 if_num
= neigh_node
->if_incoming
->if_num
;
1140 sum_neigh
= orig_node_tmp
->bat_iv
.bcast_own_sum
[if_num
];
1141 spin_unlock_bh(&orig_node_tmp
->bat_iv
.ogm_cnt_lock
);
1143 if (sum_orig
>= sum_neigh
)
1147 batadv_update_route(bat_priv
, orig_node
, if_outgoing
, neigh_node
);
1154 batadv_neigh_node_put(neigh_node
);
1156 batadv_neigh_node_put(router
);
1158 batadv_neigh_ifinfo_put(neigh_ifinfo
);
1160 batadv_neigh_ifinfo_put(router_ifinfo
);
1164 * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet
1165 * @orig_node: the orig node who originally emitted the ogm packet
1166 * @orig_neigh_node: the orig node struct of the neighbor who sent the packet
1167 * @batadv_ogm_packet: the ogm packet
1168 * @if_incoming: interface where the packet was received
1169 * @if_outgoing: interface for which the retransmission should be considered
1171 * Return: true if the link can be considered bidirectional, false otherwise
1173 static bool batadv_iv_ogm_calc_tq(struct batadv_orig_node
*orig_node
,
1174 struct batadv_orig_node
*orig_neigh_node
,
1175 struct batadv_ogm_packet
*batadv_ogm_packet
,
1176 struct batadv_hard_iface
*if_incoming
,
1177 struct batadv_hard_iface
*if_outgoing
)
1179 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1180 struct batadv_neigh_node
*neigh_node
= NULL
, *tmp_neigh_node
;
1181 struct batadv_neigh_ifinfo
*neigh_ifinfo
;
1183 u8 orig_eq_count
, neigh_rq_count
, neigh_rq_inv
, tq_own
;
1184 unsigned int neigh_rq_inv_cube
, neigh_rq_max_cube
;
1185 int tq_asym_penalty
, inv_asym_penalty
, if_num
;
1186 unsigned int combined_tq
;
1187 int tq_iface_penalty
;
1190 /* find corresponding one hop neighbor */
1192 hlist_for_each_entry_rcu(tmp_neigh_node
,
1193 &orig_neigh_node
->neigh_list
, list
) {
1194 if (!batadv_compare_eth(tmp_neigh_node
->addr
,
1195 orig_neigh_node
->orig
))
1198 if (tmp_neigh_node
->if_incoming
!= if_incoming
)
1201 if (!kref_get_unless_zero(&tmp_neigh_node
->refcount
))
1204 neigh_node
= tmp_neigh_node
;
1210 neigh_node
= batadv_iv_ogm_neigh_new(if_incoming
,
1211 orig_neigh_node
->orig
,
1218 /* if orig_node is direct neighbor update neigh_node last_seen */
1219 if (orig_node
== orig_neigh_node
)
1220 neigh_node
->last_seen
= jiffies
;
1222 orig_node
->last_seen
= jiffies
;
1224 /* find packet count of corresponding one hop neighbor */
1225 spin_lock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
1226 if_num
= if_incoming
->if_num
;
1227 orig_eq_count
= orig_neigh_node
->bat_iv
.bcast_own_sum
[if_num
];
1228 neigh_ifinfo
= batadv_neigh_ifinfo_new(neigh_node
, if_outgoing
);
1230 neigh_rq_count
= neigh_ifinfo
->bat_iv
.real_packet_count
;
1231 batadv_neigh_ifinfo_put(neigh_ifinfo
);
1235 spin_unlock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
1237 /* pay attention to not get a value bigger than 100 % */
1238 if (orig_eq_count
> neigh_rq_count
)
1239 total_count
= neigh_rq_count
;
1241 total_count
= orig_eq_count
;
1243 /* if we have too few packets (too less data) we set tq_own to zero
1244 * if we receive too few packets it is not considered bidirectional
1246 if (total_count
< BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM
||
1247 neigh_rq_count
< BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM
)
1250 /* neigh_node->real_packet_count is never zero as we
1251 * only purge old information when getting new
1254 tq_own
= (BATADV_TQ_MAX_VALUE
* total_count
) / neigh_rq_count
;
1256 /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
1257 * affect the nearly-symmetric links only a little, but
1258 * punishes asymmetric links more. This will give a value
1259 * between 0 and TQ_MAX_VALUE
1261 neigh_rq_inv
= BATADV_TQ_LOCAL_WINDOW_SIZE
- neigh_rq_count
;
1262 neigh_rq_inv_cube
= neigh_rq_inv
* neigh_rq_inv
* neigh_rq_inv
;
1263 neigh_rq_max_cube
= BATADV_TQ_LOCAL_WINDOW_SIZE
*
1264 BATADV_TQ_LOCAL_WINDOW_SIZE
*
1265 BATADV_TQ_LOCAL_WINDOW_SIZE
;
1266 inv_asym_penalty
= BATADV_TQ_MAX_VALUE
* neigh_rq_inv_cube
;
1267 inv_asym_penalty
/= neigh_rq_max_cube
;
1268 tq_asym_penalty
= BATADV_TQ_MAX_VALUE
- inv_asym_penalty
;
1270 /* penalize if the OGM is forwarded on the same interface. WiFi
1271 * interfaces and other half duplex devices suffer from throughput
1272 * drops as they can't send and receive at the same time.
1274 tq_iface_penalty
= BATADV_TQ_MAX_VALUE
;
1275 if (if_outgoing
&& (if_incoming
== if_outgoing
) &&
1276 batadv_is_wifi_netdev(if_outgoing
->net_dev
))
1277 tq_iface_penalty
= batadv_hop_penalty(BATADV_TQ_MAX_VALUE
,
1280 combined_tq
= batadv_ogm_packet
->tq
*
1284 combined_tq
/= BATADV_TQ_MAX_VALUE
*
1285 BATADV_TQ_MAX_VALUE
*
1286 BATADV_TQ_MAX_VALUE
;
1287 batadv_ogm_packet
->tq
= combined_tq
;
1289 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1290 "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, iface_penalty: %3i, total tq: %3i, if_incoming = %s, if_outgoing = %s\n",
1291 orig_node
->orig
, orig_neigh_node
->orig
, total_count
,
1292 neigh_rq_count
, tq_own
, tq_asym_penalty
, tq_iface_penalty
,
1293 batadv_ogm_packet
->tq
, if_incoming
->net_dev
->name
,
1294 if_outgoing
? if_outgoing
->net_dev
->name
: "DEFAULT");
1296 /* if link has the minimum required transmission quality
1297 * consider it bidirectional
1299 if (batadv_ogm_packet
->tq
>= BATADV_TQ_TOTAL_BIDRECT_LIMIT
)
1304 batadv_neigh_node_put(neigh_node
);
1309 * batadv_iv_ogm_update_seqnos - process a batman packet for all interfaces,
1310 * adjust the sequence number and find out whether it is a duplicate
1311 * @ethhdr: ethernet header of the packet
1312 * @batadv_ogm_packet: OGM packet to be considered
1313 * @if_incoming: interface on which the OGM packet was received
1314 * @if_outgoing: interface for which the retransmission should be considered
1316 * Return: duplicate status as enum batadv_dup_status
1318 static enum batadv_dup_status
1319 batadv_iv_ogm_update_seqnos(const struct ethhdr
*ethhdr
,
1320 const struct batadv_ogm_packet
*batadv_ogm_packet
,
1321 const struct batadv_hard_iface
*if_incoming
,
1322 struct batadv_hard_iface
*if_outgoing
)
1324 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1325 struct batadv_orig_node
*orig_node
;
1326 struct batadv_orig_ifinfo
*orig_ifinfo
= NULL
;
1327 struct batadv_neigh_node
*neigh_node
;
1328 struct batadv_neigh_ifinfo
*neigh_ifinfo
;
1331 bool need_update
= false;
1333 enum batadv_dup_status ret
= BATADV_NO_DUP
;
1334 u32 seqno
= ntohl(batadv_ogm_packet
->seqno
);
1337 unsigned long *bitmap
;
1339 orig_node
= batadv_iv_ogm_orig_get(bat_priv
, batadv_ogm_packet
->orig
);
1341 return BATADV_NO_DUP
;
1343 orig_ifinfo
= batadv_orig_ifinfo_new(orig_node
, if_outgoing
);
1344 if (WARN_ON(!orig_ifinfo
)) {
1345 batadv_orig_node_put(orig_node
);
1349 spin_lock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
1350 seq_diff
= seqno
- orig_ifinfo
->last_real_seqno
;
1352 /* signalize caller that the packet is to be dropped. */
1353 if (!hlist_empty(&orig_node
->neigh_list
) &&
1354 batadv_window_protected(bat_priv
, seq_diff
,
1355 BATADV_TQ_LOCAL_WINDOW_SIZE
,
1356 &orig_ifinfo
->batman_seqno_reset
, NULL
)) {
1357 ret
= BATADV_PROTECTED
;
1362 hlist_for_each_entry_rcu(neigh_node
, &orig_node
->neigh_list
, list
) {
1363 neigh_ifinfo
= batadv_neigh_ifinfo_new(neigh_node
,
1368 neigh_addr
= neigh_node
->addr
;
1369 is_dup
= batadv_test_bit(neigh_ifinfo
->bat_iv
.real_bits
,
1370 orig_ifinfo
->last_real_seqno
,
1373 if (batadv_compare_eth(neigh_addr
, ethhdr
->h_source
) &&
1374 neigh_node
->if_incoming
== if_incoming
) {
1377 ret
= BATADV_NEIGH_DUP
;
1380 if (is_dup
&& (ret
!= BATADV_NEIGH_DUP
))
1381 ret
= BATADV_ORIG_DUP
;
1384 /* if the window moved, set the update flag. */
1385 bitmap
= neigh_ifinfo
->bat_iv
.real_bits
;
1386 need_update
|= batadv_bit_get_packet(bat_priv
, bitmap
,
1387 seq_diff
, set_mark
);
1389 packet_count
= bitmap_weight(bitmap
,
1390 BATADV_TQ_LOCAL_WINDOW_SIZE
);
1391 neigh_ifinfo
->bat_iv
.real_packet_count
= packet_count
;
1392 batadv_neigh_ifinfo_put(neigh_ifinfo
);
1397 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1398 "%s updating last_seqno: old %u, new %u\n",
1399 if_outgoing
? if_outgoing
->net_dev
->name
: "DEFAULT",
1400 orig_ifinfo
->last_real_seqno
, seqno
);
1401 orig_ifinfo
->last_real_seqno
= seqno
;
1405 spin_unlock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
1406 batadv_orig_node_put(orig_node
);
1407 batadv_orig_ifinfo_put(orig_ifinfo
);
1412 * batadv_iv_ogm_process_per_outif - process a batman iv OGM for an outgoing if
1413 * @skb: the skb containing the OGM
1414 * @ogm_offset: offset from skb->data to start of ogm header
1415 * @orig_node: the (cached) orig node for the originator of this OGM
1416 * @if_incoming: the interface where this packet was received
1417 * @if_outgoing: the interface for which the packet should be considered
1420 batadv_iv_ogm_process_per_outif(const struct sk_buff
*skb
, int ogm_offset
,
1421 struct batadv_orig_node
*orig_node
,
1422 struct batadv_hard_iface
*if_incoming
,
1423 struct batadv_hard_iface
*if_outgoing
)
1425 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1426 struct batadv_hardif_neigh_node
*hardif_neigh
= NULL
;
1427 struct batadv_neigh_node
*router
= NULL
;
1428 struct batadv_neigh_node
*router_router
= NULL
;
1429 struct batadv_orig_node
*orig_neigh_node
;
1430 struct batadv_orig_ifinfo
*orig_ifinfo
;
1431 struct batadv_neigh_node
*orig_neigh_router
= NULL
;
1432 struct batadv_neigh_ifinfo
*router_ifinfo
= NULL
;
1433 struct batadv_ogm_packet
*ogm_packet
;
1434 enum batadv_dup_status dup_status
;
1435 bool is_from_best_next_hop
= false;
1436 bool is_single_hop_neigh
= false;
1437 bool sameseq
, similar_ttl
;
1438 struct sk_buff
*skb_priv
;
1439 struct ethhdr
*ethhdr
;
1443 /* create a private copy of the skb, as some functions change tq value
1446 skb_priv
= skb_copy(skb
, GFP_ATOMIC
);
1450 ethhdr
= eth_hdr(skb_priv
);
1451 ogm_packet
= (struct batadv_ogm_packet
*)(skb_priv
->data
+ ogm_offset
);
1453 dup_status
= batadv_iv_ogm_update_seqnos(ethhdr
, ogm_packet
,
1454 if_incoming
, if_outgoing
);
1455 if (batadv_compare_eth(ethhdr
->h_source
, ogm_packet
->orig
))
1456 is_single_hop_neigh
= true;
1458 if (dup_status
== BATADV_PROTECTED
) {
1459 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1460 "Drop packet: packet within seqno protection time (sender: %pM)\n",
1465 if (ogm_packet
->tq
== 0) {
1466 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1467 "Drop packet: originator packet with tq equal 0\n");
1471 if (is_single_hop_neigh
) {
1472 hardif_neigh
= batadv_hardif_neigh_get(if_incoming
,
1475 hardif_neigh
->last_seen
= jiffies
;
1478 router
= batadv_orig_router_get(orig_node
, if_outgoing
);
1480 router_router
= batadv_orig_router_get(router
->orig_node
,
1482 router_ifinfo
= batadv_neigh_ifinfo_get(router
, if_outgoing
);
1485 if ((router_ifinfo
&& router_ifinfo
->bat_iv
.tq_avg
!= 0) &&
1486 (batadv_compare_eth(router
->addr
, ethhdr
->h_source
)))
1487 is_from_best_next_hop
= true;
1489 prev_sender
= ogm_packet
->prev_sender
;
1490 /* avoid temporary routing loops */
1491 if (router
&& router_router
&&
1492 (batadv_compare_eth(router
->addr
, prev_sender
)) &&
1493 !(batadv_compare_eth(ogm_packet
->orig
, prev_sender
)) &&
1494 (batadv_compare_eth(router
->addr
, router_router
->addr
))) {
1495 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1496 "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n",
1501 if (if_outgoing
== BATADV_IF_DEFAULT
)
1502 batadv_tvlv_ogm_receive(bat_priv
, ogm_packet
, orig_node
);
1504 /* if sender is a direct neighbor the sender mac equals
1507 if (is_single_hop_neigh
)
1508 orig_neigh_node
= orig_node
;
1510 orig_neigh_node
= batadv_iv_ogm_orig_get(bat_priv
,
1513 if (!orig_neigh_node
)
1516 /* Update nc_nodes of the originator */
1517 batadv_nc_update_nc_node(bat_priv
, orig_node
, orig_neigh_node
,
1518 ogm_packet
, is_single_hop_neigh
);
1520 orig_neigh_router
= batadv_orig_router_get(orig_neigh_node
,
1523 /* drop packet if sender is not a direct neighbor and if we
1524 * don't route towards it
1526 if (!is_single_hop_neigh
&& (!orig_neigh_router
)) {
1527 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1528 "Drop packet: OGM via unknown neighbor!\n");
1532 is_bidirect
= batadv_iv_ogm_calc_tq(orig_node
, orig_neigh_node
,
1533 ogm_packet
, if_incoming
,
1536 /* update ranking if it is not a duplicate or has the same
1537 * seqno and similar ttl as the non-duplicate
1539 orig_ifinfo
= batadv_orig_ifinfo_new(orig_node
, if_outgoing
);
1543 sameseq
= orig_ifinfo
->last_real_seqno
== ntohl(ogm_packet
->seqno
);
1544 similar_ttl
= (orig_ifinfo
->last_ttl
- 3) <= ogm_packet
->ttl
;
1546 if (is_bidirect
&& ((dup_status
== BATADV_NO_DUP
) ||
1547 (sameseq
&& similar_ttl
))) {
1548 batadv_iv_ogm_orig_update(bat_priv
, orig_node
,
1549 orig_ifinfo
, ethhdr
,
1550 ogm_packet
, if_incoming
,
1551 if_outgoing
, dup_status
);
1553 batadv_orig_ifinfo_put(orig_ifinfo
);
1555 /* only forward for specific interface, not for the default one. */
1556 if (if_outgoing
== BATADV_IF_DEFAULT
)
1559 /* is single hop (direct) neighbor */
1560 if (is_single_hop_neigh
) {
1561 /* OGMs from secondary interfaces should only scheduled once
1562 * per interface where it has been received, not multiple times
1564 if ((ogm_packet
->ttl
<= 2) &&
1565 (if_incoming
!= if_outgoing
)) {
1566 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1567 "Drop packet: OGM from secondary interface and wrong outgoing interface\n");
1570 /* mark direct link on incoming interface */
1571 batadv_iv_ogm_forward(orig_node
, ethhdr
, ogm_packet
,
1572 is_single_hop_neigh
,
1573 is_from_best_next_hop
, if_incoming
,
1576 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1577 "Forwarding packet: rebroadcast neighbor packet with direct link flag\n");
1581 /* multihop originator */
1583 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1584 "Drop packet: not received via bidirectional link\n");
1588 if (dup_status
== BATADV_NEIGH_DUP
) {
1589 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1590 "Drop packet: duplicate packet received\n");
1594 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1595 "Forwarding packet: rebroadcast originator packet\n");
1596 batadv_iv_ogm_forward(orig_node
, ethhdr
, ogm_packet
,
1597 is_single_hop_neigh
, is_from_best_next_hop
,
1598 if_incoming
, if_outgoing
);
1601 if ((orig_neigh_node
) && (!is_single_hop_neigh
))
1602 batadv_orig_node_put(orig_neigh_node
);
1605 batadv_neigh_ifinfo_put(router_ifinfo
);
1607 batadv_neigh_node_put(router
);
1609 batadv_neigh_node_put(router_router
);
1610 if (orig_neigh_router
)
1611 batadv_neigh_node_put(orig_neigh_router
);
1613 batadv_hardif_neigh_put(hardif_neigh
);
1615 kfree_skb(skb_priv
);
1619 * batadv_iv_ogm_process - process an incoming batman iv OGM
1620 * @skb: the skb containing the OGM
1621 * @ogm_offset: offset to the OGM which should be processed (for aggregates)
1622 * @if_incoming: the interface where this packet was receved
1624 static void batadv_iv_ogm_process(const struct sk_buff
*skb
, int ogm_offset
,
1625 struct batadv_hard_iface
*if_incoming
)
1627 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1628 struct batadv_orig_node
*orig_neigh_node
, *orig_node
;
1629 struct batadv_hard_iface
*hard_iface
;
1630 struct batadv_ogm_packet
*ogm_packet
;
1631 u32 if_incoming_seqno
;
1632 bool has_directlink_flag
;
1633 struct ethhdr
*ethhdr
;
1634 bool is_my_oldorig
= false;
1635 bool is_my_addr
= false;
1636 bool is_my_orig
= false;
1638 ogm_packet
= (struct batadv_ogm_packet
*)(skb
->data
+ ogm_offset
);
1639 ethhdr
= eth_hdr(skb
);
1641 /* Silently drop when the batman packet is actually not a
1644 * This might happen if a packet is padded (e.g. Ethernet has a
1645 * minimum frame length of 64 byte) and the aggregation interprets
1646 * it as an additional length.
1648 * TODO: A more sane solution would be to have a bit in the
1649 * batadv_ogm_packet to detect whether the packet is the last
1650 * packet in an aggregation. Here we expect that the padding
1651 * is always zero (or not 0x01)
1653 if (ogm_packet
->packet_type
!= BATADV_IV_OGM
)
1656 /* could be changed by schedule_own_packet() */
1657 if_incoming_seqno
= atomic_read(&if_incoming
->bat_iv
.ogm_seqno
);
1659 if (ogm_packet
->flags
& BATADV_DIRECTLINK
)
1660 has_directlink_flag
= true;
1662 has_directlink_flag
= false;
1664 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1665 "Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, tq %d, TTL %d, V %d, IDF %d)\n",
1666 ethhdr
->h_source
, if_incoming
->net_dev
->name
,
1667 if_incoming
->net_dev
->dev_addr
, ogm_packet
->orig
,
1668 ogm_packet
->prev_sender
, ntohl(ogm_packet
->seqno
),
1669 ogm_packet
->tq
, ogm_packet
->ttl
,
1670 ogm_packet
->version
, has_directlink_flag
);
1673 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
1674 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
1677 if (hard_iface
->soft_iface
!= if_incoming
->soft_iface
)
1680 if (batadv_compare_eth(ethhdr
->h_source
,
1681 hard_iface
->net_dev
->dev_addr
))
1684 if (batadv_compare_eth(ogm_packet
->orig
,
1685 hard_iface
->net_dev
->dev_addr
))
1688 if (batadv_compare_eth(ogm_packet
->prev_sender
,
1689 hard_iface
->net_dev
->dev_addr
))
1690 is_my_oldorig
= true;
1695 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1696 "Drop packet: received my own broadcast (sender: %pM)\n",
1702 unsigned long *word
;
1708 orig_neigh_node
= batadv_iv_ogm_orig_get(bat_priv
,
1710 if (!orig_neigh_node
)
1713 /* neighbor has to indicate direct link and it has to
1714 * come via the corresponding interface
1715 * save packet seqno for bidirectional check
1717 if (has_directlink_flag
&&
1718 batadv_compare_eth(if_incoming
->net_dev
->dev_addr
,
1719 ogm_packet
->orig
)) {
1720 if_num
= if_incoming
->if_num
;
1721 offset
= if_num
* BATADV_NUM_WORDS
;
1723 spin_lock_bh(&orig_neigh_node
->bat_iv
.ogm_cnt_lock
);
1724 word
= &orig_neigh_node
->bat_iv
.bcast_own
[offset
];
1725 bit_pos
= if_incoming_seqno
- 2;
1726 bit_pos
-= ntohl(ogm_packet
->seqno
);
1727 batadv_set_bit(word
, bit_pos
);
1728 weight
= &orig_neigh_node
->bat_iv
.bcast_own_sum
[if_num
];
1729 *weight
= bitmap_weight(word
,
1730 BATADV_TQ_LOCAL_WINDOW_SIZE
);
1731 spin_unlock_bh(&orig_neigh_node
->bat_iv
.ogm_cnt_lock
);
1734 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1735 "Drop packet: originator packet from myself (via neighbor)\n");
1736 batadv_orig_node_put(orig_neigh_node
);
1740 if (is_my_oldorig
) {
1741 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1742 "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n",
1747 if (ogm_packet
->flags
& BATADV_NOT_BEST_NEXT_HOP
) {
1748 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1749 "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n",
1754 orig_node
= batadv_iv_ogm_orig_get(bat_priv
, ogm_packet
->orig
);
1758 batadv_iv_ogm_process_per_outif(skb
, ogm_offset
, orig_node
,
1759 if_incoming
, BATADV_IF_DEFAULT
);
1762 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
1763 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
1766 if (hard_iface
->soft_iface
!= bat_priv
->soft_iface
)
1769 if (!kref_get_unless_zero(&hard_iface
->refcount
))
1772 batadv_iv_ogm_process_per_outif(skb
, ogm_offset
, orig_node
,
1773 if_incoming
, hard_iface
);
1775 batadv_hardif_put(hard_iface
);
1779 batadv_orig_node_put(orig_node
);
1782 static int batadv_iv_ogm_receive(struct sk_buff
*skb
,
1783 struct batadv_hard_iface
*if_incoming
)
1785 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1786 struct batadv_ogm_packet
*ogm_packet
;
1791 ret
= batadv_check_management_packet(skb
, if_incoming
, BATADV_OGM_HLEN
);
1795 /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface
1796 * that does not have B.A.T.M.A.N. IV enabled ?
1798 if (bat_priv
->bat_algo_ops
->bat_ogm_emit
!= batadv_iv_ogm_emit
)
1801 batadv_inc_counter(bat_priv
, BATADV_CNT_MGMT_RX
);
1802 batadv_add_counter(bat_priv
, BATADV_CNT_MGMT_RX_BYTES
,
1803 skb
->len
+ ETH_HLEN
);
1806 ogm_packet
= (struct batadv_ogm_packet
*)skb
->data
;
1808 /* unpack the aggregated packets and process them one by one */
1809 while (batadv_iv_ogm_aggr_packet(ogm_offset
, skb_headlen(skb
),
1810 ogm_packet
->tvlv_len
)) {
1811 batadv_iv_ogm_process(skb
, ogm_offset
, if_incoming
);
1813 ogm_offset
+= BATADV_OGM_HLEN
;
1814 ogm_offset
+= ntohs(ogm_packet
->tvlv_len
);
1816 packet_pos
= skb
->data
+ ogm_offset
;
1817 ogm_packet
= (struct batadv_ogm_packet
*)packet_pos
;
1821 return NET_RX_SUCCESS
;
1825 * batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table
1826 * @orig_node: the orig_node for which the neighbors are printed
1827 * @if_outgoing: outgoing interface for these entries
1828 * @seq: debugfs table seq_file struct
1830 * Must be called while holding an rcu lock.
1833 batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node
*orig_node
,
1834 struct batadv_hard_iface
*if_outgoing
,
1835 struct seq_file
*seq
)
1837 struct batadv_neigh_node
*neigh_node
;
1838 struct batadv_neigh_ifinfo
*n_ifinfo
;
1840 hlist_for_each_entry_rcu(neigh_node
, &orig_node
->neigh_list
, list
) {
1841 n_ifinfo
= batadv_neigh_ifinfo_get(neigh_node
, if_outgoing
);
1845 seq_printf(seq
, " %pM (%3i)",
1847 n_ifinfo
->bat_iv
.tq_avg
);
1849 batadv_neigh_ifinfo_put(n_ifinfo
);
1854 * batadv_iv_ogm_orig_print - print the originator table
1855 * @bat_priv: the bat priv with all the soft interface information
1856 * @seq: debugfs table seq_file struct
1857 * @if_outgoing: the outgoing interface for which this should be printed
1859 static void batadv_iv_ogm_orig_print(struct batadv_priv
*bat_priv
,
1860 struct seq_file
*seq
,
1861 struct batadv_hard_iface
*if_outgoing
)
1863 struct batadv_neigh_node
*neigh_node
;
1864 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
1865 int last_seen_msecs
, last_seen_secs
;
1866 struct batadv_orig_node
*orig_node
;
1867 struct batadv_neigh_ifinfo
*n_ifinfo
;
1868 unsigned long last_seen_jiffies
;
1869 struct hlist_head
*head
;
1870 int batman_count
= 0;
1874 " Originator last-seen (#/255) Nexthop [outgoingIF]: Potential nexthops ...\n");
1876 for (i
= 0; i
< hash
->size
; i
++) {
1877 head
= &hash
->table
[i
];
1880 hlist_for_each_entry_rcu(orig_node
, head
, hash_entry
) {
1881 neigh_node
= batadv_orig_router_get(orig_node
,
1886 n_ifinfo
= batadv_neigh_ifinfo_get(neigh_node
,
1891 if (n_ifinfo
->bat_iv
.tq_avg
== 0)
1894 last_seen_jiffies
= jiffies
- orig_node
->last_seen
;
1895 last_seen_msecs
= jiffies_to_msecs(last_seen_jiffies
);
1896 last_seen_secs
= last_seen_msecs
/ 1000;
1897 last_seen_msecs
= last_seen_msecs
% 1000;
1899 seq_printf(seq
, "%pM %4i.%03is (%3i) %pM [%10s]:",
1900 orig_node
->orig
, last_seen_secs
,
1901 last_seen_msecs
, n_ifinfo
->bat_iv
.tq_avg
,
1903 neigh_node
->if_incoming
->net_dev
->name
);
1905 batadv_iv_ogm_orig_print_neigh(orig_node
, if_outgoing
,
1907 seq_puts(seq
, "\n");
1911 batadv_neigh_node_put(neigh_node
);
1913 batadv_neigh_ifinfo_put(n_ifinfo
);
1918 if (batman_count
== 0)
1919 seq_puts(seq
, "No batman nodes in range ...\n");
1923 * batadv_iv_hardif_neigh_print - print a single hop neighbour node
1924 * @seq: neighbour table seq_file struct
1925 * @hardif_neigh: hardif neighbour information
1928 batadv_iv_hardif_neigh_print(struct seq_file
*seq
,
1929 struct batadv_hardif_neigh_node
*hardif_neigh
)
1931 int last_secs
, last_msecs
;
1933 last_secs
= jiffies_to_msecs(jiffies
- hardif_neigh
->last_seen
) / 1000;
1934 last_msecs
= jiffies_to_msecs(jiffies
- hardif_neigh
->last_seen
) % 1000;
1936 seq_printf(seq
, " %10s %pM %4i.%03is\n",
1937 hardif_neigh
->if_incoming
->net_dev
->name
,
1938 hardif_neigh
->addr
, last_secs
, last_msecs
);
1942 * batadv_iv_ogm_neigh_print - print the single hop neighbour list
1943 * @bat_priv: the bat priv with all the soft interface information
1944 * @seq: neighbour table seq_file struct
1946 static void batadv_iv_neigh_print(struct batadv_priv
*bat_priv
,
1947 struct seq_file
*seq
)
1949 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1950 struct batadv_hardif_neigh_node
*hardif_neigh
;
1951 struct batadv_hard_iface
*hard_iface
;
1952 int batman_count
= 0;
1954 seq_puts(seq
, " IF Neighbor last-seen\n");
1957 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
1958 if (hard_iface
->soft_iface
!= net_dev
)
1961 hlist_for_each_entry_rcu(hardif_neigh
,
1962 &hard_iface
->neigh_list
, list
) {
1963 batadv_iv_hardif_neigh_print(seq
, hardif_neigh
);
1969 if (batman_count
== 0)
1970 seq_puts(seq
, "No batman nodes in range ...\n");
1974 * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors
1975 * @neigh1: the first neighbor object of the comparison
1976 * @if_outgoing1: outgoing interface for the first neighbor
1977 * @neigh2: the second neighbor object of the comparison
1978 * @if_outgoing2: outgoing interface for the second neighbor
1980 * Return: a value less, equal to or greater than 0 if the metric via neigh1 is
1981 * lower, the same as or higher than the metric via neigh2
1983 static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node
*neigh1
,
1984 struct batadv_hard_iface
*if_outgoing1
,
1985 struct batadv_neigh_node
*neigh2
,
1986 struct batadv_hard_iface
*if_outgoing2
)
1988 struct batadv_neigh_ifinfo
*neigh1_ifinfo
, *neigh2_ifinfo
;
1992 neigh1_ifinfo
= batadv_neigh_ifinfo_get(neigh1
, if_outgoing1
);
1993 neigh2_ifinfo
= batadv_neigh_ifinfo_get(neigh2
, if_outgoing2
);
1995 if (!neigh1_ifinfo
|| !neigh2_ifinfo
) {
2000 tq1
= neigh1_ifinfo
->bat_iv
.tq_avg
;
2001 tq2
= neigh2_ifinfo
->bat_iv
.tq_avg
;
2006 batadv_neigh_ifinfo_put(neigh1_ifinfo
);
2008 batadv_neigh_ifinfo_put(neigh2_ifinfo
);
2014 * batadv_iv_ogm_neigh_is_sob - check if neigh1 is similarly good or better
2015 * than neigh2 from the metric prospective
2016 * @neigh1: the first neighbor object of the comparison
2017 * @if_outgoing1: outgoing interface for the first neighbor
2018 * @neigh2: the second neighbor object of the comparison
2019 * @if_outgoing2: outgoing interface for the second neighbor
2021 * Return: true if the metric via neigh1 is equally good or better than
2022 * the metric via neigh2, false otherwise.
2025 batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node
*neigh1
,
2026 struct batadv_hard_iface
*if_outgoing1
,
2027 struct batadv_neigh_node
*neigh2
,
2028 struct batadv_hard_iface
*if_outgoing2
)
2030 struct batadv_neigh_ifinfo
*neigh1_ifinfo
, *neigh2_ifinfo
;
2034 neigh1_ifinfo
= batadv_neigh_ifinfo_get(neigh1
, if_outgoing1
);
2035 neigh2_ifinfo
= batadv_neigh_ifinfo_get(neigh2
, if_outgoing2
);
2037 /* we can't say that the metric is better */
2038 if (!neigh1_ifinfo
|| !neigh2_ifinfo
) {
2043 tq1
= neigh1_ifinfo
->bat_iv
.tq_avg
;
2044 tq2
= neigh2_ifinfo
->bat_iv
.tq_avg
;
2045 ret
= (tq1
- tq2
) > -BATADV_TQ_SIMILARITY_THRESHOLD
;
2049 batadv_neigh_ifinfo_put(neigh1_ifinfo
);
2051 batadv_neigh_ifinfo_put(neigh2_ifinfo
);
2056 static struct batadv_algo_ops batadv_batman_iv __read_mostly
= {
2057 .name
= "BATMAN_IV",
2058 .bat_iface_enable
= batadv_iv_ogm_iface_enable
,
2059 .bat_iface_disable
= batadv_iv_ogm_iface_disable
,
2060 .bat_iface_update_mac
= batadv_iv_ogm_iface_update_mac
,
2061 .bat_primary_iface_set
= batadv_iv_ogm_primary_iface_set
,
2062 .bat_ogm_schedule
= batadv_iv_ogm_schedule
,
2063 .bat_ogm_emit
= batadv_iv_ogm_emit
,
2064 .bat_neigh_cmp
= batadv_iv_ogm_neigh_cmp
,
2065 .bat_neigh_is_similar_or_better
= batadv_iv_ogm_neigh_is_sob
,
2066 .bat_neigh_print
= batadv_iv_neigh_print
,
2067 .bat_orig_print
= batadv_iv_ogm_orig_print
,
2068 .bat_orig_free
= batadv_iv_ogm_orig_free
,
2069 .bat_orig_add_if
= batadv_iv_ogm_orig_add_if
,
2070 .bat_orig_del_if
= batadv_iv_ogm_orig_del_if
,
2073 int __init
batadv_iv_init(void)
2077 /* batman originator packet */
2078 ret
= batadv_recv_handler_register(BATADV_IV_OGM
,
2079 batadv_iv_ogm_receive
);
2083 ret
= batadv_algo_register(&batadv_batman_iv
);
2085 goto handler_unregister
;
2090 batadv_recv_handler_unregister(BATADV_IV_OGM
);