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/kernel.h>
34 #include <linux/kref.h>
35 #include <linux/list.h>
36 #include <linux/lockdep.h>
37 #include <linux/netdevice.h>
38 #include <linux/pkt_sched.h>
39 #include <linux/printk.h>
40 #include <linux/random.h>
41 #include <linux/rculist.h>
42 #include <linux/rcupdate.h>
43 #include <linux/seq_file.h>
44 #include <linux/skbuff.h>
45 #include <linux/slab.h>
46 #include <linux/spinlock.h>
47 #include <linux/stddef.h>
48 #include <linux/string.h>
49 #include <linux/types.h>
50 #include <linux/workqueue.h>
53 #include "hard-interface.h"
55 #include "network-coding.h"
56 #include "originator.h"
60 #include "translation-table.h"
62 static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct
*work
);
65 * enum batadv_dup_status - duplicate status
66 * @BATADV_NO_DUP: the packet is no duplicate
67 * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for the
69 * @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor
70 * @BATADV_PROTECTED: originator is currently protected (after reboot)
72 enum batadv_dup_status
{
80 * batadv_ring_buffer_set - update the ring buffer with the given value
81 * @lq_recv: pointer to the ring buffer
82 * @lq_index: index to store the value at
83 * @value: value to store in the ring buffer
85 static void batadv_ring_buffer_set(u8 lq_recv
[], u8
*lq_index
, u8 value
)
87 lq_recv
[*lq_index
] = value
;
88 *lq_index
= (*lq_index
+ 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE
;
92 * batadv_ring_buffer_avg - compute the average of all non-zero values stored
93 * in the given ring buffer
94 * @lq_recv: pointer to the ring buffer
96 * Return: computed average value.
98 static u8
batadv_ring_buffer_avg(const u8 lq_recv
[])
107 while (i
< BATADV_TQ_GLOBAL_WINDOW_SIZE
) {
120 return (u8
)(sum
/ count
);
124 * batadv_iv_ogm_orig_free - free the private resources allocated for this
126 * @orig_node: the orig_node for which the resources have to be free'd
128 static void batadv_iv_ogm_orig_free(struct batadv_orig_node
*orig_node
)
130 kfree(orig_node
->bat_iv
.bcast_own
);
131 kfree(orig_node
->bat_iv
.bcast_own_sum
);
135 * batadv_iv_ogm_orig_add_if - change the private structures of the orig_node to
136 * include the new hard-interface
137 * @orig_node: the orig_node that has to be changed
138 * @max_if_num: the current amount of interfaces
140 * Return: 0 on success, a negative error code otherwise.
142 static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node
*orig_node
,
149 spin_lock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
151 old_size
= (max_if_num
- 1) * sizeof(unsigned long) * BATADV_NUM_WORDS
;
152 data_ptr
= kmalloc_array(max_if_num
,
153 BATADV_NUM_WORDS
* sizeof(unsigned long),
158 memcpy(data_ptr
, orig_node
->bat_iv
.bcast_own
, old_size
);
159 kfree(orig_node
->bat_iv
.bcast_own
);
160 orig_node
->bat_iv
.bcast_own
= data_ptr
;
162 data_ptr
= kmalloc_array(max_if_num
, sizeof(u8
), GFP_ATOMIC
);
166 memcpy(data_ptr
, orig_node
->bat_iv
.bcast_own_sum
,
167 (max_if_num
- 1) * sizeof(u8
));
168 kfree(orig_node
->bat_iv
.bcast_own_sum
);
169 orig_node
->bat_iv
.bcast_own_sum
= data_ptr
;
174 spin_unlock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
180 * batadv_iv_ogm_drop_bcast_own_entry - drop section of bcast_own
181 * @orig_node: the orig_node that has to be changed
182 * @max_if_num: the current amount of interfaces
183 * @del_if_num: the index of the interface being removed
186 batadv_iv_ogm_drop_bcast_own_entry(struct batadv_orig_node
*orig_node
,
187 int max_if_num
, int del_if_num
)
193 lockdep_assert_held(&orig_node
->bat_iv
.ogm_cnt_lock
);
195 chunk_size
= sizeof(unsigned long) * BATADV_NUM_WORDS
;
196 data_ptr
= kmalloc_array(max_if_num
, chunk_size
, GFP_ATOMIC
);
198 /* use old buffer when new one could not be allocated */
199 data_ptr
= orig_node
->bat_iv
.bcast_own
;
201 /* copy first part */
202 memmove(data_ptr
, orig_node
->bat_iv
.bcast_own
, del_if_num
* chunk_size
);
204 /* copy second part */
205 if_offset
= (del_if_num
+ 1) * chunk_size
;
206 memmove((char *)data_ptr
+ del_if_num
* chunk_size
,
207 (uint8_t *)orig_node
->bat_iv
.bcast_own
+ if_offset
,
208 (max_if_num
- del_if_num
) * chunk_size
);
210 /* bcast_own was shrunk down in new buffer; free old one */
211 if (orig_node
->bat_iv
.bcast_own
!= data_ptr
) {
212 kfree(orig_node
->bat_iv
.bcast_own
);
213 orig_node
->bat_iv
.bcast_own
= data_ptr
;
218 * batadv_iv_ogm_drop_bcast_own_sum_entry - drop section of bcast_own_sum
219 * @orig_node: the orig_node that has to be changed
220 * @max_if_num: the current amount of interfaces
221 * @del_if_num: the index of the interface being removed
224 batadv_iv_ogm_drop_bcast_own_sum_entry(struct batadv_orig_node
*orig_node
,
225 int max_if_num
, int del_if_num
)
230 lockdep_assert_held(&orig_node
->bat_iv
.ogm_cnt_lock
);
232 data_ptr
= kmalloc_array(max_if_num
, sizeof(u8
), GFP_ATOMIC
);
234 /* use old buffer when new one could not be allocated */
235 data_ptr
= orig_node
->bat_iv
.bcast_own_sum
;
237 memmove(data_ptr
, orig_node
->bat_iv
.bcast_own_sum
,
238 del_if_num
* sizeof(u8
));
240 if_offset
= (del_if_num
+ 1) * sizeof(u8
);
241 memmove((char *)data_ptr
+ del_if_num
* sizeof(u8
),
242 orig_node
->bat_iv
.bcast_own_sum
+ if_offset
,
243 (max_if_num
- del_if_num
) * sizeof(u8
));
245 /* bcast_own_sum was shrunk down in new buffer; free old one */
246 if (orig_node
->bat_iv
.bcast_own_sum
!= data_ptr
) {
247 kfree(orig_node
->bat_iv
.bcast_own_sum
);
248 orig_node
->bat_iv
.bcast_own_sum
= data_ptr
;
253 * batadv_iv_ogm_orig_del_if - change the private structures of the orig_node to
254 * exclude the removed interface
255 * @orig_node: the orig_node that has to be changed
256 * @max_if_num: the current amount of interfaces
257 * @del_if_num: the index of the interface being removed
259 * Return: 0 on success, a negative error code otherwise.
261 static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node
*orig_node
,
262 int max_if_num
, int del_if_num
)
264 spin_lock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
266 if (max_if_num
== 0) {
267 kfree(orig_node
->bat_iv
.bcast_own
);
268 kfree(orig_node
->bat_iv
.bcast_own_sum
);
269 orig_node
->bat_iv
.bcast_own
= NULL
;
270 orig_node
->bat_iv
.bcast_own_sum
= NULL
;
272 batadv_iv_ogm_drop_bcast_own_entry(orig_node
, max_if_num
,
274 batadv_iv_ogm_drop_bcast_own_sum_entry(orig_node
, max_if_num
,
278 spin_unlock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
284 * batadv_iv_ogm_orig_get - retrieve or create (if does not exist) an originator
285 * @bat_priv: the bat priv with all the soft interface information
286 * @addr: mac address of the originator
288 * Return: the originator object corresponding to the passed mac address or NULL
290 * If the object does not exists it is created an initialised.
292 static struct batadv_orig_node
*
293 batadv_iv_ogm_orig_get(struct batadv_priv
*bat_priv
, const u8
*addr
)
295 struct batadv_orig_node
*orig_node
;
296 int size
, hash_added
;
298 orig_node
= batadv_orig_hash_find(bat_priv
, addr
);
302 orig_node
= batadv_orig_node_new(bat_priv
, addr
);
306 spin_lock_init(&orig_node
->bat_iv
.ogm_cnt_lock
);
308 size
= bat_priv
->num_ifaces
* sizeof(unsigned long) * BATADV_NUM_WORDS
;
309 orig_node
->bat_iv
.bcast_own
= kzalloc(size
, GFP_ATOMIC
);
310 if (!orig_node
->bat_iv
.bcast_own
)
313 size
= bat_priv
->num_ifaces
* sizeof(u8
);
314 orig_node
->bat_iv
.bcast_own_sum
= kzalloc(size
, GFP_ATOMIC
);
315 if (!orig_node
->bat_iv
.bcast_own_sum
)
318 hash_added
= batadv_hash_add(bat_priv
->orig_hash
, batadv_compare_orig
,
319 batadv_choose_orig
, orig_node
,
320 &orig_node
->hash_entry
);
327 /* free twice, as batadv_orig_node_new sets refcount to 2 */
328 batadv_orig_node_put(orig_node
);
329 batadv_orig_node_put(orig_node
);
334 static struct batadv_neigh_node
*
335 batadv_iv_ogm_neigh_new(struct batadv_hard_iface
*hard_iface
,
336 const u8
*neigh_addr
,
337 struct batadv_orig_node
*orig_node
,
338 struct batadv_orig_node
*orig_neigh
)
340 struct batadv_neigh_node
*neigh_node
;
342 neigh_node
= batadv_neigh_node_get_or_create(orig_node
,
343 hard_iface
, neigh_addr
);
347 neigh_node
->orig_node
= orig_neigh
;
353 static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface
*hard_iface
)
355 struct batadv_ogm_packet
*batadv_ogm_packet
;
356 unsigned char *ogm_buff
;
359 /* randomize initial seqno to avoid collision */
360 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
361 atomic_set(&hard_iface
->bat_iv
.ogm_seqno
, random_seqno
);
363 hard_iface
->bat_iv
.ogm_buff_len
= BATADV_OGM_HLEN
;
364 ogm_buff
= kmalloc(hard_iface
->bat_iv
.ogm_buff_len
, GFP_ATOMIC
);
368 hard_iface
->bat_iv
.ogm_buff
= ogm_buff
;
370 batadv_ogm_packet
= (struct batadv_ogm_packet
*)ogm_buff
;
371 batadv_ogm_packet
->packet_type
= BATADV_IV_OGM
;
372 batadv_ogm_packet
->version
= BATADV_COMPAT_VERSION
;
373 batadv_ogm_packet
->ttl
= 2;
374 batadv_ogm_packet
->flags
= BATADV_NO_FLAGS
;
375 batadv_ogm_packet
->reserved
= 0;
376 batadv_ogm_packet
->tq
= BATADV_TQ_MAX_VALUE
;
381 static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface
*hard_iface
)
383 kfree(hard_iface
->bat_iv
.ogm_buff
);
384 hard_iface
->bat_iv
.ogm_buff
= NULL
;
387 static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface
*hard_iface
)
389 struct batadv_ogm_packet
*batadv_ogm_packet
;
390 unsigned char *ogm_buff
= hard_iface
->bat_iv
.ogm_buff
;
392 batadv_ogm_packet
= (struct batadv_ogm_packet
*)ogm_buff
;
393 ether_addr_copy(batadv_ogm_packet
->orig
,
394 hard_iface
->net_dev
->dev_addr
);
395 ether_addr_copy(batadv_ogm_packet
->prev_sender
,
396 hard_iface
->net_dev
->dev_addr
);
400 batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface
*hard_iface
)
402 struct batadv_ogm_packet
*batadv_ogm_packet
;
403 unsigned char *ogm_buff
= hard_iface
->bat_iv
.ogm_buff
;
405 batadv_ogm_packet
= (struct batadv_ogm_packet
*)ogm_buff
;
406 batadv_ogm_packet
->ttl
= BATADV_TTL
;
409 /* when do we schedule our own ogm to be sent */
411 batadv_iv_ogm_emit_send_time(const struct batadv_priv
*bat_priv
)
415 msecs
= atomic_read(&bat_priv
->orig_interval
) - BATADV_JITTER
;
416 msecs
+= prandom_u32() % (2 * BATADV_JITTER
);
418 return jiffies
+ msecs_to_jiffies(msecs
);
421 /* when do we schedule a ogm packet to be sent */
422 static unsigned long batadv_iv_ogm_fwd_send_time(void)
424 return jiffies
+ msecs_to_jiffies(prandom_u32() % (BATADV_JITTER
/ 2));
427 /* apply hop penalty for a normal link */
428 static u8
batadv_hop_penalty(u8 tq
, const struct batadv_priv
*bat_priv
)
430 int hop_penalty
= atomic_read(&bat_priv
->hop_penalty
);
433 new_tq
= tq
* (BATADV_TQ_MAX_VALUE
- hop_penalty
);
434 new_tq
/= BATADV_TQ_MAX_VALUE
;
440 * batadv_iv_ogm_aggr_packet - checks if there is another OGM attached
441 * @buff_pos: current position in the skb
442 * @packet_len: total length of the skb
443 * @tvlv_len: tvlv length of the previously considered OGM
445 * Return: true if there is enough space for another OGM, false otherwise.
447 static bool batadv_iv_ogm_aggr_packet(int buff_pos
, int packet_len
,
450 int next_buff_pos
= 0;
452 next_buff_pos
+= buff_pos
+ BATADV_OGM_HLEN
;
453 next_buff_pos
+= ntohs(tvlv_len
);
455 return (next_buff_pos
<= packet_len
) &&
456 (next_buff_pos
<= BATADV_MAX_AGGREGATION_BYTES
);
459 /* send a batman ogm to a given interface */
460 static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet
*forw_packet
,
461 struct batadv_hard_iface
*hard_iface
)
463 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
467 struct batadv_ogm_packet
*batadv_ogm_packet
;
471 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
476 packet_pos
= forw_packet
->skb
->data
;
477 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_pos
;
479 /* adjust all flags and log packets */
480 while (batadv_iv_ogm_aggr_packet(buff_pos
, forw_packet
->packet_len
,
481 batadv_ogm_packet
->tvlv_len
)) {
482 /* we might have aggregated direct link packets with an
483 * ordinary base packet
485 if (forw_packet
->direct_link_flags
& BIT(packet_num
) &&
486 forw_packet
->if_incoming
== hard_iface
)
487 batadv_ogm_packet
->flags
|= BATADV_DIRECTLINK
;
489 batadv_ogm_packet
->flags
&= ~BATADV_DIRECTLINK
;
491 if (packet_num
> 0 || !forw_packet
->own
)
492 fwd_str
= "Forwarding";
494 fwd_str
= "Sending own";
496 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
497 "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n",
498 fwd_str
, (packet_num
> 0 ? "aggregated " : ""),
499 batadv_ogm_packet
->orig
,
500 ntohl(batadv_ogm_packet
->seqno
),
501 batadv_ogm_packet
->tq
, batadv_ogm_packet
->ttl
,
502 ((batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
) ?
504 hard_iface
->net_dev
->name
,
505 hard_iface
->net_dev
->dev_addr
);
507 buff_pos
+= BATADV_OGM_HLEN
;
508 buff_pos
+= ntohs(batadv_ogm_packet
->tvlv_len
);
510 packet_pos
= forw_packet
->skb
->data
+ buff_pos
;
511 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_pos
;
514 /* create clone because function is called more than once */
515 skb
= skb_clone(forw_packet
->skb
, GFP_ATOMIC
);
517 batadv_inc_counter(bat_priv
, BATADV_CNT_MGMT_TX
);
518 batadv_add_counter(bat_priv
, BATADV_CNT_MGMT_TX_BYTES
,
519 skb
->len
+ ETH_HLEN
);
520 batadv_send_broadcast_skb(skb
, hard_iface
);
524 /* send a batman ogm packet */
525 static void batadv_iv_ogm_emit(struct batadv_forw_packet
*forw_packet
)
527 struct net_device
*soft_iface
;
528 struct batadv_priv
*bat_priv
;
529 struct batadv_hard_iface
*primary_if
= NULL
;
531 if (!forw_packet
->if_incoming
) {
532 pr_err("Error - can't forward packet: incoming iface not specified\n");
536 soft_iface
= forw_packet
->if_incoming
->soft_iface
;
537 bat_priv
= netdev_priv(soft_iface
);
539 if (WARN_ON(!forw_packet
->if_outgoing
))
542 if (WARN_ON(forw_packet
->if_outgoing
->soft_iface
!= soft_iface
))
545 if (forw_packet
->if_incoming
->if_status
!= BATADV_IF_ACTIVE
)
548 primary_if
= batadv_primary_if_get_selected(bat_priv
);
552 /* only for one specific outgoing interface */
553 batadv_iv_ogm_send_to_if(forw_packet
, forw_packet
->if_outgoing
);
557 batadv_hardif_put(primary_if
);
561 * batadv_iv_ogm_can_aggregate - find out if an OGM can be aggregated on an
562 * existing forward packet
563 * @new_bat_ogm_packet: OGM packet to be aggregated
564 * @bat_priv: the bat priv with all the soft interface information
565 * @packet_len: (total) length of the OGM
566 * @send_time: timestamp (jiffies) when the packet is to be sent
567 * @directlink: true if this is a direct link packet
568 * @if_incoming: interface where the packet was received
569 * @if_outgoing: interface for which the retransmission should be considered
570 * @forw_packet: the forwarded packet which should be checked
572 * Return: true if new_packet can be aggregated with forw_packet
575 batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet
*new_bat_ogm_packet
,
576 struct batadv_priv
*bat_priv
,
577 int packet_len
, unsigned long send_time
,
579 const struct batadv_hard_iface
*if_incoming
,
580 const struct batadv_hard_iface
*if_outgoing
,
581 const struct batadv_forw_packet
*forw_packet
)
583 struct batadv_ogm_packet
*batadv_ogm_packet
;
584 int aggregated_bytes
= forw_packet
->packet_len
+ packet_len
;
585 struct batadv_hard_iface
*primary_if
= NULL
;
587 unsigned long aggregation_end_time
;
589 batadv_ogm_packet
= (struct batadv_ogm_packet
*)forw_packet
->skb
->data
;
590 aggregation_end_time
= send_time
;
591 aggregation_end_time
+= msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS
);
593 /* we can aggregate the current packet to this aggregated packet
596 * - the send time is within our MAX_AGGREGATION_MS time
597 * - the resulting packet wont be bigger than
598 * MAX_AGGREGATION_BYTES
599 * otherwise aggregation is not possible
601 if (!time_before(send_time
, forw_packet
->send_time
) ||
602 !time_after_eq(aggregation_end_time
, forw_packet
->send_time
))
605 if (aggregated_bytes
> BATADV_MAX_AGGREGATION_BYTES
)
608 /* packet is not leaving on the same interface. */
609 if (forw_packet
->if_outgoing
!= if_outgoing
)
612 /* check aggregation compatibility
613 * -> direct link packets are broadcasted on
614 * their interface only
615 * -> aggregate packet if the current packet is
616 * a "global" packet as well as the base
619 primary_if
= batadv_primary_if_get_selected(bat_priv
);
623 /* packets without direct link flag and high TTL
624 * are flooded through the net
627 !(batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
) &&
628 batadv_ogm_packet
->ttl
!= 1 &&
630 /* own packets originating non-primary
631 * interfaces leave only that interface
633 (!forw_packet
->own
||
634 forw_packet
->if_incoming
== primary_if
)) {
639 /* if the incoming packet is sent via this one
640 * interface only - we still can aggregate
643 new_bat_ogm_packet
->ttl
== 1 &&
644 forw_packet
->if_incoming
== if_incoming
&&
646 /* packets from direct neighbors or
647 * own secondary interface packets
648 * (= secondary interface packets in general)
650 (batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
||
652 forw_packet
->if_incoming
!= primary_if
))) {
659 batadv_hardif_put(primary_if
);
664 * batadv_iv_ogm_aggregate_new - create a new aggregated packet and add this
666 * @packet_buff: pointer to the OGM
667 * @packet_len: (total) length of the OGM
668 * @send_time: timestamp (jiffies) when the packet is to be sent
669 * @direct_link: whether this OGM has direct link status
670 * @if_incoming: interface where the packet was received
671 * @if_outgoing: interface for which the retransmission should be considered
672 * @own_packet: true if it is a self-generated ogm
674 static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff
,
675 int packet_len
, unsigned long send_time
,
677 struct batadv_hard_iface
*if_incoming
,
678 struct batadv_hard_iface
*if_outgoing
,
681 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
682 struct batadv_forw_packet
*forw_packet_aggr
;
683 unsigned char *skb_buff
;
684 unsigned int skb_size
;
686 /* own packet should always be scheduled */
688 if (!batadv_atomic_dec_not_zero(&bat_priv
->batman_queue_left
)) {
689 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
690 "batman packet queue full\n");
695 forw_packet_aggr
= kmalloc(sizeof(*forw_packet_aggr
), GFP_ATOMIC
);
696 if (!forw_packet_aggr
)
699 if (atomic_read(&bat_priv
->aggregated_ogms
) &&
700 packet_len
< BATADV_MAX_AGGREGATION_BYTES
)
701 skb_size
= BATADV_MAX_AGGREGATION_BYTES
;
703 skb_size
= packet_len
;
705 skb_size
+= ETH_HLEN
;
707 forw_packet_aggr
->skb
= netdev_alloc_skb_ip_align(NULL
, skb_size
);
708 if (!forw_packet_aggr
->skb
)
709 goto out_free_forw_packet
;
710 forw_packet_aggr
->skb
->priority
= TC_PRIO_CONTROL
;
711 skb_reserve(forw_packet_aggr
->skb
, ETH_HLEN
);
713 skb_buff
= skb_put(forw_packet_aggr
->skb
, packet_len
);
714 forw_packet_aggr
->packet_len
= packet_len
;
715 memcpy(skb_buff
, packet_buff
, packet_len
);
717 kref_get(&if_incoming
->refcount
);
718 kref_get(&if_outgoing
->refcount
);
719 forw_packet_aggr
->own
= own_packet
;
720 forw_packet_aggr
->if_incoming
= if_incoming
;
721 forw_packet_aggr
->if_outgoing
= if_outgoing
;
722 forw_packet_aggr
->num_packets
= 0;
723 forw_packet_aggr
->direct_link_flags
= BATADV_NO_FLAGS
;
724 forw_packet_aggr
->send_time
= send_time
;
726 /* save packet direct link flag status */
728 forw_packet_aggr
->direct_link_flags
|= 1;
730 /* add new packet to packet list */
731 spin_lock_bh(&bat_priv
->forw_bat_list_lock
);
732 hlist_add_head(&forw_packet_aggr
->list
, &bat_priv
->forw_bat_list
);
733 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
735 /* start timer for this packet */
736 INIT_DELAYED_WORK(&forw_packet_aggr
->delayed_work
,
737 batadv_iv_send_outstanding_bat_ogm_packet
);
738 queue_delayed_work(batadv_event_workqueue
,
739 &forw_packet_aggr
->delayed_work
,
740 send_time
- jiffies
);
743 out_free_forw_packet
:
744 kfree(forw_packet_aggr
);
747 atomic_inc(&bat_priv
->batman_queue_left
);
750 /* aggregate a new packet into the existing ogm packet */
751 static void batadv_iv_ogm_aggregate(struct batadv_forw_packet
*forw_packet_aggr
,
752 const unsigned char *packet_buff
,
753 int packet_len
, bool direct_link
)
755 unsigned char *skb_buff
;
756 unsigned long new_direct_link_flag
;
758 skb_buff
= skb_put(forw_packet_aggr
->skb
, packet_len
);
759 memcpy(skb_buff
, packet_buff
, packet_len
);
760 forw_packet_aggr
->packet_len
+= packet_len
;
761 forw_packet_aggr
->num_packets
++;
763 /* save packet direct link flag status */
765 new_direct_link_flag
= BIT(forw_packet_aggr
->num_packets
);
766 forw_packet_aggr
->direct_link_flags
|= new_direct_link_flag
;
771 * batadv_iv_ogm_queue_add - queue up an OGM for transmission
772 * @bat_priv: the bat priv with all the soft interface information
773 * @packet_buff: pointer to the OGM
774 * @packet_len: (total) length of the OGM
775 * @if_incoming: interface where the packet was received
776 * @if_outgoing: interface for which the retransmission should be considered
777 * @own_packet: true if it is a self-generated ogm
778 * @send_time: timestamp (jiffies) when the packet is to be sent
780 static void batadv_iv_ogm_queue_add(struct batadv_priv
*bat_priv
,
781 unsigned char *packet_buff
,
783 struct batadv_hard_iface
*if_incoming
,
784 struct batadv_hard_iface
*if_outgoing
,
785 int own_packet
, unsigned long send_time
)
787 /* _aggr -> pointer to the packet we want to aggregate with
788 * _pos -> pointer to the position in the queue
790 struct batadv_forw_packet
*forw_packet_aggr
= NULL
;
791 struct batadv_forw_packet
*forw_packet_pos
= NULL
;
792 struct batadv_ogm_packet
*batadv_ogm_packet
;
794 unsigned long max_aggregation_jiffies
;
796 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_buff
;
797 direct_link
= !!(batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
);
798 max_aggregation_jiffies
= msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS
);
800 /* find position for the packet in the forward queue */
801 spin_lock_bh(&bat_priv
->forw_bat_list_lock
);
802 /* own packets are not to be aggregated */
803 if (atomic_read(&bat_priv
->aggregated_ogms
) && !own_packet
) {
804 hlist_for_each_entry(forw_packet_pos
,
805 &bat_priv
->forw_bat_list
, list
) {
806 if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet
,
807 bat_priv
, packet_len
,
808 send_time
, direct_link
,
812 forw_packet_aggr
= forw_packet_pos
;
818 /* nothing to aggregate with - either aggregation disabled or no
819 * suitable aggregation packet found
821 if (!forw_packet_aggr
) {
822 /* the following section can run without the lock */
823 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
825 /* if we could not aggregate this packet with one of the others
826 * we hold it back for a while, so that it might be aggregated
829 if (!own_packet
&& atomic_read(&bat_priv
->aggregated_ogms
))
830 send_time
+= max_aggregation_jiffies
;
832 batadv_iv_ogm_aggregate_new(packet_buff
, packet_len
,
833 send_time
, direct_link
,
834 if_incoming
, if_outgoing
,
837 batadv_iv_ogm_aggregate(forw_packet_aggr
, packet_buff
,
838 packet_len
, direct_link
);
839 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
843 static void batadv_iv_ogm_forward(struct batadv_orig_node
*orig_node
,
844 const struct ethhdr
*ethhdr
,
845 struct batadv_ogm_packet
*batadv_ogm_packet
,
846 bool is_single_hop_neigh
,
847 bool is_from_best_next_hop
,
848 struct batadv_hard_iface
*if_incoming
,
849 struct batadv_hard_iface
*if_outgoing
)
851 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
854 if (batadv_ogm_packet
->ttl
<= 1) {
855 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
, "ttl exceeded\n");
859 if (!is_from_best_next_hop
) {
860 /* Mark the forwarded packet when it is not coming from our
861 * best next hop. We still need to forward the packet for our
862 * neighbor link quality detection to work in case the packet
863 * originated from a single hop neighbor. Otherwise we can
864 * simply drop the ogm.
866 if (is_single_hop_neigh
)
867 batadv_ogm_packet
->flags
|= BATADV_NOT_BEST_NEXT_HOP
;
872 tvlv_len
= ntohs(batadv_ogm_packet
->tvlv_len
);
874 batadv_ogm_packet
->ttl
--;
875 ether_addr_copy(batadv_ogm_packet
->prev_sender
, ethhdr
->h_source
);
877 /* apply hop penalty */
878 batadv_ogm_packet
->tq
= batadv_hop_penalty(batadv_ogm_packet
->tq
,
881 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
882 "Forwarding packet: tq: %i, ttl: %i\n",
883 batadv_ogm_packet
->tq
, batadv_ogm_packet
->ttl
);
885 if (is_single_hop_neigh
)
886 batadv_ogm_packet
->flags
|= BATADV_DIRECTLINK
;
888 batadv_ogm_packet
->flags
&= ~BATADV_DIRECTLINK
;
890 batadv_iv_ogm_queue_add(bat_priv
, (unsigned char *)batadv_ogm_packet
,
891 BATADV_OGM_HLEN
+ tvlv_len
,
892 if_incoming
, if_outgoing
, 0,
893 batadv_iv_ogm_fwd_send_time());
897 * batadv_iv_ogm_slide_own_bcast_window - bitshift own OGM broadcast windows for
898 * the given interface
899 * @hard_iface: the interface for which the windows have to be shifted
902 batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface
*hard_iface
)
904 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
905 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
906 struct hlist_head
*head
;
907 struct batadv_orig_node
*orig_node
;
914 for (i
= 0; i
< hash
->size
; i
++) {
915 head
= &hash
->table
[i
];
918 hlist_for_each_entry_rcu(orig_node
, head
, hash_entry
) {
919 spin_lock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
920 word_index
= hard_iface
->if_num
* BATADV_NUM_WORDS
;
921 word
= &orig_node
->bat_iv
.bcast_own
[word_index
];
923 batadv_bit_get_packet(bat_priv
, word
, 1, 0);
924 if_num
= hard_iface
->if_num
;
925 w
= &orig_node
->bat_iv
.bcast_own_sum
[if_num
];
926 *w
= bitmap_weight(word
, BATADV_TQ_LOCAL_WINDOW_SIZE
);
927 spin_unlock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
933 static void batadv_iv_ogm_schedule(struct batadv_hard_iface
*hard_iface
)
935 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
936 unsigned char **ogm_buff
= &hard_iface
->bat_iv
.ogm_buff
;
937 struct batadv_ogm_packet
*batadv_ogm_packet
;
938 struct batadv_hard_iface
*primary_if
, *tmp_hard_iface
;
939 int *ogm_buff_len
= &hard_iface
->bat_iv
.ogm_buff_len
;
942 unsigned long send_time
;
944 if ((hard_iface
->if_status
== BATADV_IF_NOT_IN_USE
) ||
945 (hard_iface
->if_status
== BATADV_IF_TO_BE_REMOVED
))
948 /* the interface gets activated here to avoid race conditions between
949 * the moment of activating the interface in
950 * hardif_activate_interface() where the originator mac is set and
951 * outdated packets (especially uninitialized mac addresses) in the
954 if (hard_iface
->if_status
== BATADV_IF_TO_BE_ACTIVATED
)
955 hard_iface
->if_status
= BATADV_IF_ACTIVE
;
957 primary_if
= batadv_primary_if_get_selected(bat_priv
);
959 if (hard_iface
== primary_if
) {
960 /* tt changes have to be committed before the tvlv data is
961 * appended as it may alter the tt tvlv container
963 batadv_tt_local_commit_changes(bat_priv
);
964 tvlv_len
= batadv_tvlv_container_ogm_append(bat_priv
, ogm_buff
,
969 batadv_ogm_packet
= (struct batadv_ogm_packet
*)(*ogm_buff
);
970 batadv_ogm_packet
->tvlv_len
= htons(tvlv_len
);
972 /* change sequence number to network order */
973 seqno
= (u32
)atomic_read(&hard_iface
->bat_iv
.ogm_seqno
);
974 batadv_ogm_packet
->seqno
= htonl(seqno
);
975 atomic_inc(&hard_iface
->bat_iv
.ogm_seqno
);
977 batadv_iv_ogm_slide_own_bcast_window(hard_iface
);
979 send_time
= batadv_iv_ogm_emit_send_time(bat_priv
);
981 if (hard_iface
!= primary_if
) {
982 /* OGMs from secondary interfaces are only scheduled on their
983 * respective interfaces.
985 batadv_iv_ogm_queue_add(bat_priv
, *ogm_buff
, *ogm_buff_len
,
986 hard_iface
, hard_iface
, 1, send_time
);
990 /* OGMs from primary interfaces are scheduled on all
994 list_for_each_entry_rcu(tmp_hard_iface
, &batadv_hardif_list
, list
) {
995 if (tmp_hard_iface
->soft_iface
!= hard_iface
->soft_iface
)
998 if (!kref_get_unless_zero(&tmp_hard_iface
->refcount
))
1001 batadv_iv_ogm_queue_add(bat_priv
, *ogm_buff
,
1002 *ogm_buff_len
, hard_iface
,
1003 tmp_hard_iface
, 1, send_time
);
1005 batadv_hardif_put(tmp_hard_iface
);
1011 batadv_hardif_put(primary_if
);
1015 * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an
1017 * @bat_priv: the bat priv with all the soft interface information
1018 * @orig_node: the orig node who originally emitted the ogm packet
1019 * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node
1020 * @ethhdr: Ethernet header of the OGM
1021 * @batadv_ogm_packet: the ogm packet
1022 * @if_incoming: interface where the packet was received
1023 * @if_outgoing: interface for which the retransmission should be considered
1024 * @dup_status: the duplicate status of this ogm packet.
1027 batadv_iv_ogm_orig_update(struct batadv_priv
*bat_priv
,
1028 struct batadv_orig_node
*orig_node
,
1029 struct batadv_orig_ifinfo
*orig_ifinfo
,
1030 const struct ethhdr
*ethhdr
,
1031 const struct batadv_ogm_packet
*batadv_ogm_packet
,
1032 struct batadv_hard_iface
*if_incoming
,
1033 struct batadv_hard_iface
*if_outgoing
,
1034 enum batadv_dup_status dup_status
)
1036 struct batadv_neigh_ifinfo
*neigh_ifinfo
= NULL
;
1037 struct batadv_neigh_ifinfo
*router_ifinfo
= NULL
;
1038 struct batadv_neigh_node
*neigh_node
= NULL
;
1039 struct batadv_neigh_node
*tmp_neigh_node
= NULL
;
1040 struct batadv_neigh_node
*router
= NULL
;
1041 struct batadv_orig_node
*orig_node_tmp
;
1043 u8 sum_orig
, sum_neigh
;
1047 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1048 "update_originator(): Searching and updating originator entry of received packet\n");
1051 hlist_for_each_entry_rcu(tmp_neigh_node
,
1052 &orig_node
->neigh_list
, list
) {
1053 neigh_addr
= tmp_neigh_node
->addr
;
1054 if (batadv_compare_eth(neigh_addr
, ethhdr
->h_source
) &&
1055 tmp_neigh_node
->if_incoming
== if_incoming
&&
1056 kref_get_unless_zero(&tmp_neigh_node
->refcount
)) {
1057 if (WARN(neigh_node
, "too many matching neigh_nodes"))
1058 batadv_neigh_node_put(neigh_node
);
1059 neigh_node
= tmp_neigh_node
;
1063 if (dup_status
!= BATADV_NO_DUP
)
1066 /* only update the entry for this outgoing interface */
1067 neigh_ifinfo
= batadv_neigh_ifinfo_get(tmp_neigh_node
,
1072 spin_lock_bh(&tmp_neigh_node
->ifinfo_lock
);
1073 batadv_ring_buffer_set(neigh_ifinfo
->bat_iv
.tq_recv
,
1074 &neigh_ifinfo
->bat_iv
.tq_index
, 0);
1075 tq_avg
= batadv_ring_buffer_avg(neigh_ifinfo
->bat_iv
.tq_recv
);
1076 neigh_ifinfo
->bat_iv
.tq_avg
= tq_avg
;
1077 spin_unlock_bh(&tmp_neigh_node
->ifinfo_lock
);
1079 batadv_neigh_ifinfo_put(neigh_ifinfo
);
1080 neigh_ifinfo
= NULL
;
1084 struct batadv_orig_node
*orig_tmp
;
1086 orig_tmp
= batadv_iv_ogm_orig_get(bat_priv
, ethhdr
->h_source
);
1090 neigh_node
= batadv_iv_ogm_neigh_new(if_incoming
,
1092 orig_node
, orig_tmp
);
1094 batadv_orig_node_put(orig_tmp
);
1098 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1099 "Updating existing last-hop neighbor of originator\n");
1103 neigh_ifinfo
= batadv_neigh_ifinfo_new(neigh_node
, if_outgoing
);
1107 neigh_node
->last_seen
= jiffies
;
1109 spin_lock_bh(&neigh_node
->ifinfo_lock
);
1110 batadv_ring_buffer_set(neigh_ifinfo
->bat_iv
.tq_recv
,
1111 &neigh_ifinfo
->bat_iv
.tq_index
,
1112 batadv_ogm_packet
->tq
);
1113 tq_avg
= batadv_ring_buffer_avg(neigh_ifinfo
->bat_iv
.tq_recv
);
1114 neigh_ifinfo
->bat_iv
.tq_avg
= tq_avg
;
1115 spin_unlock_bh(&neigh_node
->ifinfo_lock
);
1117 if (dup_status
== BATADV_NO_DUP
) {
1118 orig_ifinfo
->last_ttl
= batadv_ogm_packet
->ttl
;
1119 neigh_ifinfo
->last_ttl
= batadv_ogm_packet
->ttl
;
1122 /* if this neighbor already is our next hop there is nothing
1125 router
= batadv_orig_router_get(orig_node
, if_outgoing
);
1126 if (router
== neigh_node
)
1130 router_ifinfo
= batadv_neigh_ifinfo_get(router
, if_outgoing
);
1134 /* if this neighbor does not offer a better TQ we won't
1137 if (router_ifinfo
->bat_iv
.tq_avg
> neigh_ifinfo
->bat_iv
.tq_avg
)
1141 /* if the TQ is the same and the link not more symmetric we
1142 * won't consider it either
1144 if (router_ifinfo
&&
1145 neigh_ifinfo
->bat_iv
.tq_avg
== router_ifinfo
->bat_iv
.tq_avg
) {
1146 orig_node_tmp
= router
->orig_node
;
1147 spin_lock_bh(&orig_node_tmp
->bat_iv
.ogm_cnt_lock
);
1148 if_num
= router
->if_incoming
->if_num
;
1149 sum_orig
= orig_node_tmp
->bat_iv
.bcast_own_sum
[if_num
];
1150 spin_unlock_bh(&orig_node_tmp
->bat_iv
.ogm_cnt_lock
);
1152 orig_node_tmp
= neigh_node
->orig_node
;
1153 spin_lock_bh(&orig_node_tmp
->bat_iv
.ogm_cnt_lock
);
1154 if_num
= neigh_node
->if_incoming
->if_num
;
1155 sum_neigh
= orig_node_tmp
->bat_iv
.bcast_own_sum
[if_num
];
1156 spin_unlock_bh(&orig_node_tmp
->bat_iv
.ogm_cnt_lock
);
1158 if (sum_orig
>= sum_neigh
)
1162 batadv_update_route(bat_priv
, orig_node
, if_outgoing
, neigh_node
);
1169 batadv_neigh_node_put(neigh_node
);
1171 batadv_neigh_node_put(router
);
1173 batadv_neigh_ifinfo_put(neigh_ifinfo
);
1175 batadv_neigh_ifinfo_put(router_ifinfo
);
1179 * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet
1180 * @orig_node: the orig node who originally emitted the ogm packet
1181 * @orig_neigh_node: the orig node struct of the neighbor who sent the packet
1182 * @batadv_ogm_packet: the ogm packet
1183 * @if_incoming: interface where the packet was received
1184 * @if_outgoing: interface for which the retransmission should be considered
1186 * Return: true if the link can be considered bidirectional, false otherwise
1188 static bool batadv_iv_ogm_calc_tq(struct batadv_orig_node
*orig_node
,
1189 struct batadv_orig_node
*orig_neigh_node
,
1190 struct batadv_ogm_packet
*batadv_ogm_packet
,
1191 struct batadv_hard_iface
*if_incoming
,
1192 struct batadv_hard_iface
*if_outgoing
)
1194 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1195 struct batadv_neigh_node
*neigh_node
= NULL
, *tmp_neigh_node
;
1196 struct batadv_neigh_ifinfo
*neigh_ifinfo
;
1198 u8 orig_eq_count
, neigh_rq_count
, neigh_rq_inv
, tq_own
;
1199 unsigned int neigh_rq_inv_cube
, neigh_rq_max_cube
;
1201 unsigned int tq_asym_penalty
, inv_asym_penalty
;
1202 unsigned int combined_tq
;
1203 unsigned int tq_iface_penalty
;
1206 /* find corresponding one hop neighbor */
1208 hlist_for_each_entry_rcu(tmp_neigh_node
,
1209 &orig_neigh_node
->neigh_list
, list
) {
1210 if (!batadv_compare_eth(tmp_neigh_node
->addr
,
1211 orig_neigh_node
->orig
))
1214 if (tmp_neigh_node
->if_incoming
!= if_incoming
)
1217 if (!kref_get_unless_zero(&tmp_neigh_node
->refcount
))
1220 neigh_node
= tmp_neigh_node
;
1226 neigh_node
= batadv_iv_ogm_neigh_new(if_incoming
,
1227 orig_neigh_node
->orig
,
1234 /* if orig_node is direct neighbor update neigh_node last_seen */
1235 if (orig_node
== orig_neigh_node
)
1236 neigh_node
->last_seen
= jiffies
;
1238 orig_node
->last_seen
= jiffies
;
1240 /* find packet count of corresponding one hop neighbor */
1241 spin_lock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
1242 if_num
= if_incoming
->if_num
;
1243 orig_eq_count
= orig_neigh_node
->bat_iv
.bcast_own_sum
[if_num
];
1244 neigh_ifinfo
= batadv_neigh_ifinfo_new(neigh_node
, if_outgoing
);
1246 neigh_rq_count
= neigh_ifinfo
->bat_iv
.real_packet_count
;
1247 batadv_neigh_ifinfo_put(neigh_ifinfo
);
1251 spin_unlock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
1253 /* pay attention to not get a value bigger than 100 % */
1254 if (orig_eq_count
> neigh_rq_count
)
1255 total_count
= neigh_rq_count
;
1257 total_count
= orig_eq_count
;
1259 /* if we have too few packets (too less data) we set tq_own to zero
1260 * if we receive too few packets it is not considered bidirectional
1262 if (total_count
< BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM
||
1263 neigh_rq_count
< BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM
)
1266 /* neigh_node->real_packet_count is never zero as we
1267 * only purge old information when getting new
1270 tq_own
= (BATADV_TQ_MAX_VALUE
* total_count
) / neigh_rq_count
;
1272 /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
1273 * affect the nearly-symmetric links only a little, but
1274 * punishes asymmetric links more. This will give a value
1275 * between 0 and TQ_MAX_VALUE
1277 neigh_rq_inv
= BATADV_TQ_LOCAL_WINDOW_SIZE
- neigh_rq_count
;
1278 neigh_rq_inv_cube
= neigh_rq_inv
* neigh_rq_inv
* neigh_rq_inv
;
1279 neigh_rq_max_cube
= BATADV_TQ_LOCAL_WINDOW_SIZE
*
1280 BATADV_TQ_LOCAL_WINDOW_SIZE
*
1281 BATADV_TQ_LOCAL_WINDOW_SIZE
;
1282 inv_asym_penalty
= BATADV_TQ_MAX_VALUE
* neigh_rq_inv_cube
;
1283 inv_asym_penalty
/= neigh_rq_max_cube
;
1284 tq_asym_penalty
= BATADV_TQ_MAX_VALUE
- inv_asym_penalty
;
1286 /* penalize if the OGM is forwarded on the same interface. WiFi
1287 * interfaces and other half duplex devices suffer from throughput
1288 * drops as they can't send and receive at the same time.
1290 tq_iface_penalty
= BATADV_TQ_MAX_VALUE
;
1291 if (if_outgoing
&& (if_incoming
== if_outgoing
) &&
1292 batadv_is_wifi_netdev(if_outgoing
->net_dev
))
1293 tq_iface_penalty
= batadv_hop_penalty(BATADV_TQ_MAX_VALUE
,
1296 combined_tq
= batadv_ogm_packet
->tq
*
1300 combined_tq
/= BATADV_TQ_MAX_VALUE
*
1301 BATADV_TQ_MAX_VALUE
*
1302 BATADV_TQ_MAX_VALUE
;
1303 batadv_ogm_packet
->tq
= combined_tq
;
1305 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1306 "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",
1307 orig_node
->orig
, orig_neigh_node
->orig
, total_count
,
1308 neigh_rq_count
, tq_own
, tq_asym_penalty
, tq_iface_penalty
,
1309 batadv_ogm_packet
->tq
, if_incoming
->net_dev
->name
,
1310 if_outgoing
? if_outgoing
->net_dev
->name
: "DEFAULT");
1312 /* if link has the minimum required transmission quality
1313 * consider it bidirectional
1315 if (batadv_ogm_packet
->tq
>= BATADV_TQ_TOTAL_BIDRECT_LIMIT
)
1320 batadv_neigh_node_put(neigh_node
);
1325 * batadv_iv_ogm_update_seqnos - process a batman packet for all interfaces,
1326 * adjust the sequence number and find out whether it is a duplicate
1327 * @ethhdr: ethernet header of the packet
1328 * @batadv_ogm_packet: OGM packet to be considered
1329 * @if_incoming: interface on which the OGM packet was received
1330 * @if_outgoing: interface for which the retransmission should be considered
1332 * Return: duplicate status as enum batadv_dup_status
1334 static enum batadv_dup_status
1335 batadv_iv_ogm_update_seqnos(const struct ethhdr
*ethhdr
,
1336 const struct batadv_ogm_packet
*batadv_ogm_packet
,
1337 const struct batadv_hard_iface
*if_incoming
,
1338 struct batadv_hard_iface
*if_outgoing
)
1340 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1341 struct batadv_orig_node
*orig_node
;
1342 struct batadv_orig_ifinfo
*orig_ifinfo
= NULL
;
1343 struct batadv_neigh_node
*neigh_node
;
1344 struct batadv_neigh_ifinfo
*neigh_ifinfo
;
1347 bool need_update
= false;
1349 enum batadv_dup_status ret
= BATADV_NO_DUP
;
1350 u32 seqno
= ntohl(batadv_ogm_packet
->seqno
);
1353 unsigned long *bitmap
;
1355 orig_node
= batadv_iv_ogm_orig_get(bat_priv
, batadv_ogm_packet
->orig
);
1357 return BATADV_NO_DUP
;
1359 orig_ifinfo
= batadv_orig_ifinfo_new(orig_node
, if_outgoing
);
1360 if (WARN_ON(!orig_ifinfo
)) {
1361 batadv_orig_node_put(orig_node
);
1365 spin_lock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
1366 seq_diff
= seqno
- orig_ifinfo
->last_real_seqno
;
1368 /* signalize caller that the packet is to be dropped. */
1369 if (!hlist_empty(&orig_node
->neigh_list
) &&
1370 batadv_window_protected(bat_priv
, seq_diff
,
1371 BATADV_TQ_LOCAL_WINDOW_SIZE
,
1372 &orig_ifinfo
->batman_seqno_reset
, NULL
)) {
1373 ret
= BATADV_PROTECTED
;
1378 hlist_for_each_entry_rcu(neigh_node
, &orig_node
->neigh_list
, list
) {
1379 neigh_ifinfo
= batadv_neigh_ifinfo_new(neigh_node
,
1384 neigh_addr
= neigh_node
->addr
;
1385 is_dup
= batadv_test_bit(neigh_ifinfo
->bat_iv
.real_bits
,
1386 orig_ifinfo
->last_real_seqno
,
1389 if (batadv_compare_eth(neigh_addr
, ethhdr
->h_source
) &&
1390 neigh_node
->if_incoming
== if_incoming
) {
1393 ret
= BATADV_NEIGH_DUP
;
1396 if (is_dup
&& (ret
!= BATADV_NEIGH_DUP
))
1397 ret
= BATADV_ORIG_DUP
;
1400 /* if the window moved, set the update flag. */
1401 bitmap
= neigh_ifinfo
->bat_iv
.real_bits
;
1402 need_update
|= batadv_bit_get_packet(bat_priv
, bitmap
,
1403 seq_diff
, set_mark
);
1405 packet_count
= bitmap_weight(bitmap
,
1406 BATADV_TQ_LOCAL_WINDOW_SIZE
);
1407 neigh_ifinfo
->bat_iv
.real_packet_count
= packet_count
;
1408 batadv_neigh_ifinfo_put(neigh_ifinfo
);
1413 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1414 "%s updating last_seqno: old %u, new %u\n",
1415 if_outgoing
? if_outgoing
->net_dev
->name
: "DEFAULT",
1416 orig_ifinfo
->last_real_seqno
, seqno
);
1417 orig_ifinfo
->last_real_seqno
= seqno
;
1421 spin_unlock_bh(&orig_node
->bat_iv
.ogm_cnt_lock
);
1422 batadv_orig_node_put(orig_node
);
1423 batadv_orig_ifinfo_put(orig_ifinfo
);
1428 * batadv_iv_ogm_process_per_outif - process a batman iv OGM for an outgoing if
1429 * @skb: the skb containing the OGM
1430 * @ogm_offset: offset from skb->data to start of ogm header
1431 * @orig_node: the (cached) orig node for the originator of this OGM
1432 * @if_incoming: the interface where this packet was received
1433 * @if_outgoing: the interface for which the packet should be considered
1436 batadv_iv_ogm_process_per_outif(const struct sk_buff
*skb
, int ogm_offset
,
1437 struct batadv_orig_node
*orig_node
,
1438 struct batadv_hard_iface
*if_incoming
,
1439 struct batadv_hard_iface
*if_outgoing
)
1441 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1442 struct batadv_hardif_neigh_node
*hardif_neigh
= NULL
;
1443 struct batadv_neigh_node
*router
= NULL
;
1444 struct batadv_neigh_node
*router_router
= NULL
;
1445 struct batadv_orig_node
*orig_neigh_node
;
1446 struct batadv_orig_ifinfo
*orig_ifinfo
;
1447 struct batadv_neigh_node
*orig_neigh_router
= NULL
;
1448 struct batadv_neigh_ifinfo
*router_ifinfo
= NULL
;
1449 struct batadv_ogm_packet
*ogm_packet
;
1450 enum batadv_dup_status dup_status
;
1451 bool is_from_best_next_hop
= false;
1452 bool is_single_hop_neigh
= false;
1453 bool sameseq
, similar_ttl
;
1454 struct sk_buff
*skb_priv
;
1455 struct ethhdr
*ethhdr
;
1459 /* create a private copy of the skb, as some functions change tq value
1462 skb_priv
= skb_copy(skb
, GFP_ATOMIC
);
1466 ethhdr
= eth_hdr(skb_priv
);
1467 ogm_packet
= (struct batadv_ogm_packet
*)(skb_priv
->data
+ ogm_offset
);
1469 dup_status
= batadv_iv_ogm_update_seqnos(ethhdr
, ogm_packet
,
1470 if_incoming
, if_outgoing
);
1471 if (batadv_compare_eth(ethhdr
->h_source
, ogm_packet
->orig
))
1472 is_single_hop_neigh
= true;
1474 if (dup_status
== BATADV_PROTECTED
) {
1475 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1476 "Drop packet: packet within seqno protection time (sender: %pM)\n",
1481 if (ogm_packet
->tq
== 0) {
1482 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1483 "Drop packet: originator packet with tq equal 0\n");
1487 if (is_single_hop_neigh
) {
1488 hardif_neigh
= batadv_hardif_neigh_get(if_incoming
,
1491 hardif_neigh
->last_seen
= jiffies
;
1494 router
= batadv_orig_router_get(orig_node
, if_outgoing
);
1496 router_router
= batadv_orig_router_get(router
->orig_node
,
1498 router_ifinfo
= batadv_neigh_ifinfo_get(router
, if_outgoing
);
1501 if ((router_ifinfo
&& router_ifinfo
->bat_iv
.tq_avg
!= 0) &&
1502 (batadv_compare_eth(router
->addr
, ethhdr
->h_source
)))
1503 is_from_best_next_hop
= true;
1505 prev_sender
= ogm_packet
->prev_sender
;
1506 /* avoid temporary routing loops */
1507 if (router
&& router_router
&&
1508 (batadv_compare_eth(router
->addr
, prev_sender
)) &&
1509 !(batadv_compare_eth(ogm_packet
->orig
, prev_sender
)) &&
1510 (batadv_compare_eth(router
->addr
, router_router
->addr
))) {
1511 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1512 "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n",
1517 if (if_outgoing
== BATADV_IF_DEFAULT
)
1518 batadv_tvlv_ogm_receive(bat_priv
, ogm_packet
, orig_node
);
1520 /* if sender is a direct neighbor the sender mac equals
1523 if (is_single_hop_neigh
)
1524 orig_neigh_node
= orig_node
;
1526 orig_neigh_node
= batadv_iv_ogm_orig_get(bat_priv
,
1529 if (!orig_neigh_node
)
1532 /* Update nc_nodes of the originator */
1533 batadv_nc_update_nc_node(bat_priv
, orig_node
, orig_neigh_node
,
1534 ogm_packet
, is_single_hop_neigh
);
1536 orig_neigh_router
= batadv_orig_router_get(orig_neigh_node
,
1539 /* drop packet if sender is not a direct neighbor and if we
1540 * don't route towards it
1542 if (!is_single_hop_neigh
&& (!orig_neigh_router
)) {
1543 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1544 "Drop packet: OGM via unknown neighbor!\n");
1548 is_bidirect
= batadv_iv_ogm_calc_tq(orig_node
, orig_neigh_node
,
1549 ogm_packet
, if_incoming
,
1552 /* update ranking if it is not a duplicate or has the same
1553 * seqno and similar ttl as the non-duplicate
1555 orig_ifinfo
= batadv_orig_ifinfo_new(orig_node
, if_outgoing
);
1559 sameseq
= orig_ifinfo
->last_real_seqno
== ntohl(ogm_packet
->seqno
);
1560 similar_ttl
= (orig_ifinfo
->last_ttl
- 3) <= ogm_packet
->ttl
;
1562 if (is_bidirect
&& ((dup_status
== BATADV_NO_DUP
) ||
1563 (sameseq
&& similar_ttl
))) {
1564 batadv_iv_ogm_orig_update(bat_priv
, orig_node
,
1565 orig_ifinfo
, ethhdr
,
1566 ogm_packet
, if_incoming
,
1567 if_outgoing
, dup_status
);
1569 batadv_orig_ifinfo_put(orig_ifinfo
);
1571 /* only forward for specific interface, not for the default one. */
1572 if (if_outgoing
== BATADV_IF_DEFAULT
)
1575 /* is single hop (direct) neighbor */
1576 if (is_single_hop_neigh
) {
1577 /* OGMs from secondary interfaces should only scheduled once
1578 * per interface where it has been received, not multiple times
1580 if ((ogm_packet
->ttl
<= 2) &&
1581 (if_incoming
!= if_outgoing
)) {
1582 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1583 "Drop packet: OGM from secondary interface and wrong outgoing interface\n");
1586 /* mark direct link on incoming interface */
1587 batadv_iv_ogm_forward(orig_node
, ethhdr
, ogm_packet
,
1588 is_single_hop_neigh
,
1589 is_from_best_next_hop
, if_incoming
,
1592 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1593 "Forwarding packet: rebroadcast neighbor packet with direct link flag\n");
1597 /* multihop originator */
1599 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1600 "Drop packet: not received via bidirectional link\n");
1604 if (dup_status
== BATADV_NEIGH_DUP
) {
1605 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1606 "Drop packet: duplicate packet received\n");
1610 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1611 "Forwarding packet: rebroadcast originator packet\n");
1612 batadv_iv_ogm_forward(orig_node
, ethhdr
, ogm_packet
,
1613 is_single_hop_neigh
, is_from_best_next_hop
,
1614 if_incoming
, if_outgoing
);
1617 if ((orig_neigh_node
) && (!is_single_hop_neigh
))
1618 batadv_orig_node_put(orig_neigh_node
);
1621 batadv_neigh_ifinfo_put(router_ifinfo
);
1623 batadv_neigh_node_put(router
);
1625 batadv_neigh_node_put(router_router
);
1626 if (orig_neigh_router
)
1627 batadv_neigh_node_put(orig_neigh_router
);
1629 batadv_hardif_neigh_put(hardif_neigh
);
1631 kfree_skb(skb_priv
);
1635 * batadv_iv_ogm_process - process an incoming batman iv OGM
1636 * @skb: the skb containing the OGM
1637 * @ogm_offset: offset to the OGM which should be processed (for aggregates)
1638 * @if_incoming: the interface where this packet was receved
1640 static void batadv_iv_ogm_process(const struct sk_buff
*skb
, int ogm_offset
,
1641 struct batadv_hard_iface
*if_incoming
)
1643 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1644 struct batadv_orig_node
*orig_neigh_node
, *orig_node
;
1645 struct batadv_hard_iface
*hard_iface
;
1646 struct batadv_ogm_packet
*ogm_packet
;
1647 u32 if_incoming_seqno
;
1648 bool has_directlink_flag
;
1649 struct ethhdr
*ethhdr
;
1650 bool is_my_oldorig
= false;
1651 bool is_my_addr
= false;
1652 bool is_my_orig
= false;
1654 ogm_packet
= (struct batadv_ogm_packet
*)(skb
->data
+ ogm_offset
);
1655 ethhdr
= eth_hdr(skb
);
1657 /* Silently drop when the batman packet is actually not a
1660 * This might happen if a packet is padded (e.g. Ethernet has a
1661 * minimum frame length of 64 byte) and the aggregation interprets
1662 * it as an additional length.
1664 * TODO: A more sane solution would be to have a bit in the
1665 * batadv_ogm_packet to detect whether the packet is the last
1666 * packet in an aggregation. Here we expect that the padding
1667 * is always zero (or not 0x01)
1669 if (ogm_packet
->packet_type
!= BATADV_IV_OGM
)
1672 /* could be changed by schedule_own_packet() */
1673 if_incoming_seqno
= atomic_read(&if_incoming
->bat_iv
.ogm_seqno
);
1675 if (ogm_packet
->flags
& BATADV_DIRECTLINK
)
1676 has_directlink_flag
= true;
1678 has_directlink_flag
= false;
1680 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1681 "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",
1682 ethhdr
->h_source
, if_incoming
->net_dev
->name
,
1683 if_incoming
->net_dev
->dev_addr
, ogm_packet
->orig
,
1684 ogm_packet
->prev_sender
, ntohl(ogm_packet
->seqno
),
1685 ogm_packet
->tq
, ogm_packet
->ttl
,
1686 ogm_packet
->version
, has_directlink_flag
);
1689 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
1690 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
1693 if (hard_iface
->soft_iface
!= if_incoming
->soft_iface
)
1696 if (batadv_compare_eth(ethhdr
->h_source
,
1697 hard_iface
->net_dev
->dev_addr
))
1700 if (batadv_compare_eth(ogm_packet
->orig
,
1701 hard_iface
->net_dev
->dev_addr
))
1704 if (batadv_compare_eth(ogm_packet
->prev_sender
,
1705 hard_iface
->net_dev
->dev_addr
))
1706 is_my_oldorig
= true;
1711 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1712 "Drop packet: received my own broadcast (sender: %pM)\n",
1718 unsigned long *word
;
1724 orig_neigh_node
= batadv_iv_ogm_orig_get(bat_priv
,
1726 if (!orig_neigh_node
)
1729 /* neighbor has to indicate direct link and it has to
1730 * come via the corresponding interface
1731 * save packet seqno for bidirectional check
1733 if (has_directlink_flag
&&
1734 batadv_compare_eth(if_incoming
->net_dev
->dev_addr
,
1735 ogm_packet
->orig
)) {
1736 if_num
= if_incoming
->if_num
;
1737 offset
= if_num
* BATADV_NUM_WORDS
;
1739 spin_lock_bh(&orig_neigh_node
->bat_iv
.ogm_cnt_lock
);
1740 word
= &orig_neigh_node
->bat_iv
.bcast_own
[offset
];
1741 bit_pos
= if_incoming_seqno
- 2;
1742 bit_pos
-= ntohl(ogm_packet
->seqno
);
1743 batadv_set_bit(word
, bit_pos
);
1744 weight
= &orig_neigh_node
->bat_iv
.bcast_own_sum
[if_num
];
1745 *weight
= bitmap_weight(word
,
1746 BATADV_TQ_LOCAL_WINDOW_SIZE
);
1747 spin_unlock_bh(&orig_neigh_node
->bat_iv
.ogm_cnt_lock
);
1750 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1751 "Drop packet: originator packet from myself (via neighbor)\n");
1752 batadv_orig_node_put(orig_neigh_node
);
1756 if (is_my_oldorig
) {
1757 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1758 "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n",
1763 if (ogm_packet
->flags
& BATADV_NOT_BEST_NEXT_HOP
) {
1764 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1765 "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n",
1770 orig_node
= batadv_iv_ogm_orig_get(bat_priv
, ogm_packet
->orig
);
1774 batadv_iv_ogm_process_per_outif(skb
, ogm_offset
, orig_node
,
1775 if_incoming
, BATADV_IF_DEFAULT
);
1778 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
1779 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
1782 if (hard_iface
->soft_iface
!= bat_priv
->soft_iface
)
1785 if (!kref_get_unless_zero(&hard_iface
->refcount
))
1788 batadv_iv_ogm_process_per_outif(skb
, ogm_offset
, orig_node
,
1789 if_incoming
, hard_iface
);
1791 batadv_hardif_put(hard_iface
);
1795 batadv_orig_node_put(orig_node
);
1798 static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct
*work
)
1800 struct delayed_work
*delayed_work
;
1801 struct batadv_forw_packet
*forw_packet
;
1802 struct batadv_priv
*bat_priv
;
1804 delayed_work
= to_delayed_work(work
);
1805 forw_packet
= container_of(delayed_work
, struct batadv_forw_packet
,
1807 bat_priv
= netdev_priv(forw_packet
->if_incoming
->soft_iface
);
1808 spin_lock_bh(&bat_priv
->forw_bat_list_lock
);
1809 hlist_del(&forw_packet
->list
);
1810 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
1812 if (atomic_read(&bat_priv
->mesh_state
) == BATADV_MESH_DEACTIVATING
)
1815 batadv_iv_ogm_emit(forw_packet
);
1817 /* we have to have at least one packet in the queue to determine the
1818 * queues wake up time unless we are shutting down.
1820 * only re-schedule if this is the "original" copy, e.g. the OGM of the
1821 * primary interface should only be rescheduled once per period, but
1822 * this function will be called for the forw_packet instances of the
1823 * other secondary interfaces as well.
1825 if (forw_packet
->own
&&
1826 forw_packet
->if_incoming
== forw_packet
->if_outgoing
)
1827 batadv_iv_ogm_schedule(forw_packet
->if_incoming
);
1830 /* don't count own packet */
1831 if (!forw_packet
->own
)
1832 atomic_inc(&bat_priv
->batman_queue_left
);
1834 batadv_forw_packet_free(forw_packet
);
1837 static int batadv_iv_ogm_receive(struct sk_buff
*skb
,
1838 struct batadv_hard_iface
*if_incoming
)
1840 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1841 struct batadv_ogm_packet
*ogm_packet
;
1846 ret
= batadv_check_management_packet(skb
, if_incoming
, BATADV_OGM_HLEN
);
1850 /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface
1851 * that does not have B.A.T.M.A.N. IV enabled ?
1853 if (bat_priv
->bat_algo_ops
->bat_iface_enable
!=
1854 batadv_iv_ogm_iface_enable
)
1857 batadv_inc_counter(bat_priv
, BATADV_CNT_MGMT_RX
);
1858 batadv_add_counter(bat_priv
, BATADV_CNT_MGMT_RX_BYTES
,
1859 skb
->len
+ ETH_HLEN
);
1862 ogm_packet
= (struct batadv_ogm_packet
*)skb
->data
;
1864 /* unpack the aggregated packets and process them one by one */
1865 while (batadv_iv_ogm_aggr_packet(ogm_offset
, skb_headlen(skb
),
1866 ogm_packet
->tvlv_len
)) {
1867 batadv_iv_ogm_process(skb
, ogm_offset
, if_incoming
);
1869 ogm_offset
+= BATADV_OGM_HLEN
;
1870 ogm_offset
+= ntohs(ogm_packet
->tvlv_len
);
1872 packet_pos
= skb
->data
+ ogm_offset
;
1873 ogm_packet
= (struct batadv_ogm_packet
*)packet_pos
;
1877 return NET_RX_SUCCESS
;
1881 * batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table
1882 * @orig_node: the orig_node for which the neighbors are printed
1883 * @if_outgoing: outgoing interface for these entries
1884 * @seq: debugfs table seq_file struct
1886 * Must be called while holding an rcu lock.
1889 batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node
*orig_node
,
1890 struct batadv_hard_iface
*if_outgoing
,
1891 struct seq_file
*seq
)
1893 struct batadv_neigh_node
*neigh_node
;
1894 struct batadv_neigh_ifinfo
*n_ifinfo
;
1896 hlist_for_each_entry_rcu(neigh_node
, &orig_node
->neigh_list
, list
) {
1897 n_ifinfo
= batadv_neigh_ifinfo_get(neigh_node
, if_outgoing
);
1901 seq_printf(seq
, " %pM (%3i)",
1903 n_ifinfo
->bat_iv
.tq_avg
);
1905 batadv_neigh_ifinfo_put(n_ifinfo
);
1910 * batadv_iv_ogm_orig_print - print the originator table
1911 * @bat_priv: the bat priv with all the soft interface information
1912 * @seq: debugfs table seq_file struct
1913 * @if_outgoing: the outgoing interface for which this should be printed
1915 static void batadv_iv_ogm_orig_print(struct batadv_priv
*bat_priv
,
1916 struct seq_file
*seq
,
1917 struct batadv_hard_iface
*if_outgoing
)
1919 struct batadv_neigh_node
*neigh_node
;
1920 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
1921 int last_seen_msecs
, last_seen_secs
;
1922 struct batadv_orig_node
*orig_node
;
1923 struct batadv_neigh_ifinfo
*n_ifinfo
;
1924 unsigned long last_seen_jiffies
;
1925 struct hlist_head
*head
;
1926 int batman_count
= 0;
1930 " Originator last-seen (#/255) Nexthop [outgoingIF]: Potential nexthops ...\n");
1932 for (i
= 0; i
< hash
->size
; i
++) {
1933 head
= &hash
->table
[i
];
1936 hlist_for_each_entry_rcu(orig_node
, head
, hash_entry
) {
1937 neigh_node
= batadv_orig_router_get(orig_node
,
1942 n_ifinfo
= batadv_neigh_ifinfo_get(neigh_node
,
1947 if (n_ifinfo
->bat_iv
.tq_avg
== 0)
1950 last_seen_jiffies
= jiffies
- orig_node
->last_seen
;
1951 last_seen_msecs
= jiffies_to_msecs(last_seen_jiffies
);
1952 last_seen_secs
= last_seen_msecs
/ 1000;
1953 last_seen_msecs
= last_seen_msecs
% 1000;
1955 seq_printf(seq
, "%pM %4i.%03is (%3i) %pM [%10s]:",
1956 orig_node
->orig
, last_seen_secs
,
1957 last_seen_msecs
, n_ifinfo
->bat_iv
.tq_avg
,
1959 neigh_node
->if_incoming
->net_dev
->name
);
1961 batadv_iv_ogm_orig_print_neigh(orig_node
, if_outgoing
,
1963 seq_puts(seq
, "\n");
1967 batadv_neigh_node_put(neigh_node
);
1969 batadv_neigh_ifinfo_put(n_ifinfo
);
1974 if (batman_count
== 0)
1975 seq_puts(seq
, "No batman nodes in range ...\n");
1979 * batadv_iv_hardif_neigh_print - print a single hop neighbour node
1980 * @seq: neighbour table seq_file struct
1981 * @hardif_neigh: hardif neighbour information
1984 batadv_iv_hardif_neigh_print(struct seq_file
*seq
,
1985 struct batadv_hardif_neigh_node
*hardif_neigh
)
1987 int last_secs
, last_msecs
;
1989 last_secs
= jiffies_to_msecs(jiffies
- hardif_neigh
->last_seen
) / 1000;
1990 last_msecs
= jiffies_to_msecs(jiffies
- hardif_neigh
->last_seen
) % 1000;
1992 seq_printf(seq
, " %10s %pM %4i.%03is\n",
1993 hardif_neigh
->if_incoming
->net_dev
->name
,
1994 hardif_neigh
->addr
, last_secs
, last_msecs
);
1998 * batadv_iv_ogm_neigh_print - print the single hop neighbour list
1999 * @bat_priv: the bat priv with all the soft interface information
2000 * @seq: neighbour table seq_file struct
2002 static void batadv_iv_neigh_print(struct batadv_priv
*bat_priv
,
2003 struct seq_file
*seq
)
2005 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
2006 struct batadv_hardif_neigh_node
*hardif_neigh
;
2007 struct batadv_hard_iface
*hard_iface
;
2008 int batman_count
= 0;
2010 seq_puts(seq
, " IF Neighbor last-seen\n");
2013 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
2014 if (hard_iface
->soft_iface
!= net_dev
)
2017 hlist_for_each_entry_rcu(hardif_neigh
,
2018 &hard_iface
->neigh_list
, list
) {
2019 batadv_iv_hardif_neigh_print(seq
, hardif_neigh
);
2025 if (batman_count
== 0)
2026 seq_puts(seq
, "No batman nodes in range ...\n");
2030 * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors
2031 * @neigh1: the first neighbor object of the comparison
2032 * @if_outgoing1: outgoing interface for the first neighbor
2033 * @neigh2: the second neighbor object of the comparison
2034 * @if_outgoing2: outgoing interface for the second neighbor
2036 * Return: a value less, equal to or greater than 0 if the metric via neigh1 is
2037 * lower, the same as or higher than the metric via neigh2
2039 static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node
*neigh1
,
2040 struct batadv_hard_iface
*if_outgoing1
,
2041 struct batadv_neigh_node
*neigh2
,
2042 struct batadv_hard_iface
*if_outgoing2
)
2044 struct batadv_neigh_ifinfo
*neigh1_ifinfo
, *neigh2_ifinfo
;
2048 neigh1_ifinfo
= batadv_neigh_ifinfo_get(neigh1
, if_outgoing1
);
2049 neigh2_ifinfo
= batadv_neigh_ifinfo_get(neigh2
, if_outgoing2
);
2051 if (!neigh1_ifinfo
|| !neigh2_ifinfo
) {
2056 tq1
= neigh1_ifinfo
->bat_iv
.tq_avg
;
2057 tq2
= neigh2_ifinfo
->bat_iv
.tq_avg
;
2062 batadv_neigh_ifinfo_put(neigh1_ifinfo
);
2064 batadv_neigh_ifinfo_put(neigh2_ifinfo
);
2070 * batadv_iv_ogm_neigh_is_sob - check if neigh1 is similarly good or better
2071 * than neigh2 from the metric prospective
2072 * @neigh1: the first neighbor object of the comparison
2073 * @if_outgoing1: outgoing interface for the first neighbor
2074 * @neigh2: the second neighbor object of the comparison
2075 * @if_outgoing2: outgoing interface for the second neighbor
2077 * Return: true if the metric via neigh1 is equally good or better than
2078 * the metric via neigh2, false otherwise.
2081 batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node
*neigh1
,
2082 struct batadv_hard_iface
*if_outgoing1
,
2083 struct batadv_neigh_node
*neigh2
,
2084 struct batadv_hard_iface
*if_outgoing2
)
2086 struct batadv_neigh_ifinfo
*neigh1_ifinfo
, *neigh2_ifinfo
;
2090 neigh1_ifinfo
= batadv_neigh_ifinfo_get(neigh1
, if_outgoing1
);
2091 neigh2_ifinfo
= batadv_neigh_ifinfo_get(neigh2
, if_outgoing2
);
2093 /* we can't say that the metric is better */
2094 if (!neigh1_ifinfo
|| !neigh2_ifinfo
) {
2099 tq1
= neigh1_ifinfo
->bat_iv
.tq_avg
;
2100 tq2
= neigh2_ifinfo
->bat_iv
.tq_avg
;
2101 ret
= (tq1
- tq2
) > -BATADV_TQ_SIMILARITY_THRESHOLD
;
2105 batadv_neigh_ifinfo_put(neigh1_ifinfo
);
2107 batadv_neigh_ifinfo_put(neigh2_ifinfo
);
2112 static void batadv_iv_iface_activate(struct batadv_hard_iface
*hard_iface
)
2114 /* begin scheduling originator messages on that interface */
2115 batadv_iv_ogm_schedule(hard_iface
);
2118 static struct batadv_algo_ops batadv_batman_iv __read_mostly
= {
2119 .name
= "BATMAN_IV",
2120 .bat_iface_activate
= batadv_iv_iface_activate
,
2121 .bat_iface_enable
= batadv_iv_ogm_iface_enable
,
2122 .bat_iface_disable
= batadv_iv_ogm_iface_disable
,
2123 .bat_iface_update_mac
= batadv_iv_ogm_iface_update_mac
,
2124 .bat_primary_iface_set
= batadv_iv_ogm_primary_iface_set
,
2125 .bat_neigh_cmp
= batadv_iv_ogm_neigh_cmp
,
2126 .bat_neigh_is_similar_or_better
= batadv_iv_ogm_neigh_is_sob
,
2127 .bat_neigh_print
= batadv_iv_neigh_print
,
2128 .bat_orig_print
= batadv_iv_ogm_orig_print
,
2129 .bat_orig_free
= batadv_iv_ogm_orig_free
,
2130 .bat_orig_add_if
= batadv_iv_ogm_orig_add_if
,
2131 .bat_orig_del_if
= batadv_iv_ogm_orig_del_if
,
2134 int __init
batadv_iv_init(void)
2138 /* batman originator packet */
2139 ret
= batadv_recv_handler_register(BATADV_IV_OGM
,
2140 batadv_iv_ogm_receive
);
2144 ret
= batadv_algo_register(&batadv_batman_iv
);
2146 goto handler_unregister
;
2151 batadv_recv_handler_unregister(BATADV_IV_OGM
);