1 /* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich, Antonio Quartulli
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 #include "translation-table.h"
21 #include <linux/atomic.h>
22 #include <linux/bitops.h>
23 #include <linux/bug.h>
24 #include <linux/byteorder/generic.h>
25 #include <linux/compiler.h>
26 #include <linux/crc32c.h>
27 #include <linux/errno.h>
28 #include <linux/etherdevice.h>
30 #include <linux/if_ether.h>
31 #include <linux/jhash.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/rculist.h>
39 #include <linux/rcupdate.h>
40 #include <linux/seq_file.h>
41 #include <linux/slab.h>
42 #include <linux/spinlock.h>
43 #include <linux/stddef.h>
44 #include <linux/string.h>
45 #include <linux/workqueue.h>
47 #include "bridge_loop_avoidance.h"
48 #include "hard-interface.h"
50 #include "multicast.h"
51 #include "originator.h"
53 #include "soft-interface.h"
56 static struct lock_class_key batadv_tt_local_hash_lock_class_key
;
57 static struct lock_class_key batadv_tt_global_hash_lock_class_key
;
59 static void batadv_send_roam_adv(struct batadv_priv
*bat_priv
, u8
*client
,
61 struct batadv_orig_node
*orig_node
);
62 static void batadv_tt_purge(struct work_struct
*work
);
64 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry
*tt_global_entry
);
65 static void batadv_tt_global_del(struct batadv_priv
*bat_priv
,
66 struct batadv_orig_node
*orig_node
,
67 const unsigned char *addr
,
68 unsigned short vid
, const char *message
,
72 * batadv_compare_tt - check if two TT entries are the same
73 * @node: the list element pointer of the first TT entry
74 * @data2: pointer to the tt_common_entry of the second TT entry
76 * Compare the MAC address and the VLAN ID of the two TT entries and check if
77 * they are the same TT client.
78 * Return: true if the two TT clients are the same, false otherwise
80 static bool batadv_compare_tt(const struct hlist_node
*node
, const void *data2
)
82 const void *data1
= container_of(node
, struct batadv_tt_common_entry
,
84 const struct batadv_tt_common_entry
*tt1
= data1
;
85 const struct batadv_tt_common_entry
*tt2
= data2
;
87 return (tt1
->vid
== tt2
->vid
) && batadv_compare_eth(data1
, data2
);
91 * batadv_choose_tt - return the index of the tt entry in the hash table
92 * @data: pointer to the tt_common_entry object to map
93 * @size: the size of the hash table
95 * Return: the hash index where the object represented by 'data' should be
98 static inline u32
batadv_choose_tt(const void *data
, u32 size
)
100 struct batadv_tt_common_entry
*tt
;
103 tt
= (struct batadv_tt_common_entry
*)data
;
104 hash
= jhash(&tt
->addr
, ETH_ALEN
, hash
);
105 hash
= jhash(&tt
->vid
, sizeof(tt
->vid
), hash
);
111 * batadv_tt_hash_find - look for a client in the given hash table
112 * @hash: the hash table to search
113 * @addr: the mac address of the client to look for
114 * @vid: VLAN identifier
116 * Return: a pointer to the tt_common struct belonging to the searched client if
117 * found, NULL otherwise.
119 static struct batadv_tt_common_entry
*
120 batadv_tt_hash_find(struct batadv_hashtable
*hash
, const u8
*addr
,
123 struct hlist_head
*head
;
124 struct batadv_tt_common_entry to_search
, *tt
, *tt_tmp
= NULL
;
130 ether_addr_copy(to_search
.addr
, addr
);
133 index
= batadv_choose_tt(&to_search
, hash
->size
);
134 head
= &hash
->table
[index
];
137 hlist_for_each_entry_rcu(tt
, head
, hash_entry
) {
138 if (!batadv_compare_eth(tt
, addr
))
144 if (!kref_get_unless_zero(&tt
->refcount
))
156 * batadv_tt_local_hash_find - search the local table for a given client
157 * @bat_priv: the bat priv with all the soft interface information
158 * @addr: the mac address of the client to look for
159 * @vid: VLAN identifier
161 * Return: a pointer to the corresponding tt_local_entry struct if the client is
162 * found, NULL otherwise.
164 static struct batadv_tt_local_entry
*
165 batadv_tt_local_hash_find(struct batadv_priv
*bat_priv
, const u8
*addr
,
168 struct batadv_tt_common_entry
*tt_common_entry
;
169 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
171 tt_common_entry
= batadv_tt_hash_find(bat_priv
->tt
.local_hash
, addr
,
174 tt_local_entry
= container_of(tt_common_entry
,
175 struct batadv_tt_local_entry
,
177 return tt_local_entry
;
181 * batadv_tt_global_hash_find - search the global table for a given client
182 * @bat_priv: the bat priv with all the soft interface information
183 * @addr: the mac address of the client to look for
184 * @vid: VLAN identifier
186 * Return: a pointer to the corresponding tt_global_entry struct if the client
187 * is found, NULL otherwise.
189 static struct batadv_tt_global_entry
*
190 batadv_tt_global_hash_find(struct batadv_priv
*bat_priv
, const u8
*addr
,
193 struct batadv_tt_common_entry
*tt_common_entry
;
194 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
196 tt_common_entry
= batadv_tt_hash_find(bat_priv
->tt
.global_hash
, addr
,
199 tt_global_entry
= container_of(tt_common_entry
,
200 struct batadv_tt_global_entry
,
202 return tt_global_entry
;
206 * batadv_tt_local_entry_release - release tt_local_entry from lists and queue
207 * for free after rcu grace period
208 * @ref: kref pointer of the nc_node
210 static void batadv_tt_local_entry_release(struct kref
*ref
)
212 struct batadv_tt_local_entry
*tt_local_entry
;
214 tt_local_entry
= container_of(ref
, struct batadv_tt_local_entry
,
217 batadv_softif_vlan_put(tt_local_entry
->vlan
);
219 kfree_rcu(tt_local_entry
, common
.rcu
);
223 * batadv_tt_local_entry_put - decrement the tt_local_entry refcounter and
224 * possibly release it
225 * @tt_local_entry: tt_local_entry to be free'd
228 batadv_tt_local_entry_put(struct batadv_tt_local_entry
*tt_local_entry
)
230 kref_put(&tt_local_entry
->common
.refcount
,
231 batadv_tt_local_entry_release
);
235 * batadv_tt_global_entry_release - release tt_global_entry from lists and queue
236 * for free after rcu grace period
237 * @ref: kref pointer of the nc_node
239 static void batadv_tt_global_entry_release(struct kref
*ref
)
241 struct batadv_tt_global_entry
*tt_global_entry
;
243 tt_global_entry
= container_of(ref
, struct batadv_tt_global_entry
,
246 batadv_tt_global_del_orig_list(tt_global_entry
);
247 kfree_rcu(tt_global_entry
, common
.rcu
);
251 * batadv_tt_global_entry_put - decrement the tt_global_entry refcounter and
252 * possibly release it
253 * @tt_global_entry: tt_global_entry to be free'd
256 batadv_tt_global_entry_put(struct batadv_tt_global_entry
*tt_global_entry
)
258 kref_put(&tt_global_entry
->common
.refcount
,
259 batadv_tt_global_entry_release
);
263 * batadv_tt_global_hash_count - count the number of orig entries
264 * @bat_priv: the bat priv with all the soft interface information
265 * @addr: the mac address of the client to count entries for
266 * @vid: VLAN identifier
268 * Return: the number of originators advertising the given address/data
269 * (excluding ourself).
271 int batadv_tt_global_hash_count(struct batadv_priv
*bat_priv
,
272 const u8
*addr
, unsigned short vid
)
274 struct batadv_tt_global_entry
*tt_global_entry
;
277 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
278 if (!tt_global_entry
)
281 count
= atomic_read(&tt_global_entry
->orig_list_count
);
282 batadv_tt_global_entry_put(tt_global_entry
);
288 * batadv_tt_local_size_mod - change the size by v of the local table identified
290 * @bat_priv: the bat priv with all the soft interface information
291 * @vid: the VLAN identifier of the sub-table to change
292 * @v: the amount to sum to the local table size
294 static void batadv_tt_local_size_mod(struct batadv_priv
*bat_priv
,
295 unsigned short vid
, int v
)
297 struct batadv_softif_vlan
*vlan
;
299 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
303 atomic_add(v
, &vlan
->tt
.num_entries
);
305 batadv_softif_vlan_put(vlan
);
309 * batadv_tt_local_size_inc - increase by one the local table size for the given
311 * @bat_priv: the bat priv with all the soft interface information
312 * @vid: the VLAN identifier
314 static void batadv_tt_local_size_inc(struct batadv_priv
*bat_priv
,
317 batadv_tt_local_size_mod(bat_priv
, vid
, 1);
321 * batadv_tt_local_size_dec - decrease by one the local table size for the given
323 * @bat_priv: the bat priv with all the soft interface information
324 * @vid: the VLAN identifier
326 static void batadv_tt_local_size_dec(struct batadv_priv
*bat_priv
,
329 batadv_tt_local_size_mod(bat_priv
, vid
, -1);
333 * batadv_tt_global_size_mod - change the size by v of the global table
334 * for orig_node identified by vid
335 * @orig_node: the originator for which the table has to be modified
336 * @vid: the VLAN identifier
337 * @v: the amount to sum to the global table size
339 static void batadv_tt_global_size_mod(struct batadv_orig_node
*orig_node
,
340 unsigned short vid
, int v
)
342 struct batadv_orig_node_vlan
*vlan
;
344 vlan
= batadv_orig_node_vlan_new(orig_node
, vid
);
348 if (atomic_add_return(v
, &vlan
->tt
.num_entries
) == 0) {
349 spin_lock_bh(&orig_node
->vlan_list_lock
);
350 if (!hlist_unhashed(&vlan
->list
)) {
351 hlist_del_init_rcu(&vlan
->list
);
352 batadv_orig_node_vlan_put(vlan
);
354 spin_unlock_bh(&orig_node
->vlan_list_lock
);
357 batadv_orig_node_vlan_put(vlan
);
361 * batadv_tt_global_size_inc - increase by one the global table size for the
363 * @orig_node: the originator which global table size has to be decreased
364 * @vid: the vlan identifier
366 static void batadv_tt_global_size_inc(struct batadv_orig_node
*orig_node
,
369 batadv_tt_global_size_mod(orig_node
, vid
, 1);
373 * batadv_tt_global_size_dec - decrease by one the global table size for the
375 * @orig_node: the originator which global table size has to be decreased
376 * @vid: the vlan identifier
378 static void batadv_tt_global_size_dec(struct batadv_orig_node
*orig_node
,
381 batadv_tt_global_size_mod(orig_node
, vid
, -1);
385 * batadv_tt_orig_list_entry_release - release tt orig entry from lists and
386 * queue for free after rcu grace period
387 * @ref: kref pointer of the tt orig entry
389 static void batadv_tt_orig_list_entry_release(struct kref
*ref
)
391 struct batadv_tt_orig_list_entry
*orig_entry
;
393 orig_entry
= container_of(ref
, struct batadv_tt_orig_list_entry
,
396 batadv_orig_node_put(orig_entry
->orig_node
);
397 kfree_rcu(orig_entry
, rcu
);
401 * batadv_tt_orig_list_entry_put - decrement the tt orig entry refcounter and
402 * possibly release it
403 * @orig_entry: tt orig entry to be free'd
406 batadv_tt_orig_list_entry_put(struct batadv_tt_orig_list_entry
*orig_entry
)
408 kref_put(&orig_entry
->refcount
, batadv_tt_orig_list_entry_release
);
412 * batadv_tt_local_event - store a local TT event (ADD/DEL)
413 * @bat_priv: the bat priv with all the soft interface information
414 * @tt_local_entry: the TT entry involved in the event
415 * @event_flags: flags to store in the event structure
417 static void batadv_tt_local_event(struct batadv_priv
*bat_priv
,
418 struct batadv_tt_local_entry
*tt_local_entry
,
421 struct batadv_tt_change_node
*tt_change_node
, *entry
, *safe
;
422 struct batadv_tt_common_entry
*common
= &tt_local_entry
->common
;
423 u8 flags
= common
->flags
| event_flags
;
424 bool event_removed
= false;
425 bool del_op_requested
, del_op_entry
;
427 tt_change_node
= kmalloc(sizeof(*tt_change_node
), GFP_ATOMIC
);
431 tt_change_node
->change
.flags
= flags
;
432 memset(tt_change_node
->change
.reserved
, 0,
433 sizeof(tt_change_node
->change
.reserved
));
434 ether_addr_copy(tt_change_node
->change
.addr
, common
->addr
);
435 tt_change_node
->change
.vid
= htons(common
->vid
);
437 del_op_requested
= flags
& BATADV_TT_CLIENT_DEL
;
439 /* check for ADD+DEL or DEL+ADD events */
440 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
441 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
443 if (!batadv_compare_eth(entry
->change
.addr
, common
->addr
))
446 /* DEL+ADD in the same orig interval have no effect and can be
447 * removed to avoid silly behaviour on the receiver side. The
448 * other way around (ADD+DEL) can happen in case of roaming of
449 * a client still in the NEW state. Roaming of NEW clients is
450 * now possible due to automatically recognition of "temporary"
453 del_op_entry
= entry
->change
.flags
& BATADV_TT_CLIENT_DEL
;
454 if (!del_op_requested
&& del_op_entry
)
456 if (del_op_requested
&& !del_op_entry
)
459 /* this is a second add in the same originator interval. It
460 * means that flags have been changed: update them!
462 if (!del_op_requested
&& !del_op_entry
)
463 entry
->change
.flags
= flags
;
467 list_del(&entry
->list
);
469 kfree(tt_change_node
);
470 event_removed
= true;
474 /* track the change in the OGMinterval list */
475 list_add_tail(&tt_change_node
->list
, &bat_priv
->tt
.changes_list
);
478 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
481 atomic_dec(&bat_priv
->tt
.local_changes
);
483 atomic_inc(&bat_priv
->tt
.local_changes
);
487 * batadv_tt_len - compute length in bytes of given number of tt changes
488 * @changes_num: number of tt changes
490 * Return: computed length in bytes.
492 static int batadv_tt_len(int changes_num
)
494 return changes_num
* sizeof(struct batadv_tvlv_tt_change
);
498 * batadv_tt_entries - compute the number of entries fitting in tt_len bytes
499 * @tt_len: available space
501 * Return: the number of entries.
503 static u16
batadv_tt_entries(u16 tt_len
)
505 return tt_len
/ batadv_tt_len(1);
509 * batadv_tt_local_table_transmit_size - calculates the local translation table
510 * size when transmitted over the air
511 * @bat_priv: the bat priv with all the soft interface information
513 * Return: local translation table size in bytes.
515 static int batadv_tt_local_table_transmit_size(struct batadv_priv
*bat_priv
)
518 u16 tt_local_entries
= 0;
519 struct batadv_softif_vlan
*vlan
;
523 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
525 tt_local_entries
+= atomic_read(&vlan
->tt
.num_entries
);
529 /* header size of tvlv encapsulated tt response payload */
530 hdr_size
= sizeof(struct batadv_unicast_tvlv_packet
);
531 hdr_size
+= sizeof(struct batadv_tvlv_hdr
);
532 hdr_size
+= sizeof(struct batadv_tvlv_tt_data
);
533 hdr_size
+= num_vlan
* sizeof(struct batadv_tvlv_tt_vlan_data
);
535 return hdr_size
+ batadv_tt_len(tt_local_entries
);
538 static int batadv_tt_local_init(struct batadv_priv
*bat_priv
)
540 if (bat_priv
->tt
.local_hash
)
543 bat_priv
->tt
.local_hash
= batadv_hash_new(1024);
545 if (!bat_priv
->tt
.local_hash
)
548 batadv_hash_set_lock_class(bat_priv
->tt
.local_hash
,
549 &batadv_tt_local_hash_lock_class_key
);
554 static void batadv_tt_global_free(struct batadv_priv
*bat_priv
,
555 struct batadv_tt_global_entry
*tt_global
,
558 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
559 "Deleting global tt entry %pM (vid: %d): %s\n",
560 tt_global
->common
.addr
,
561 BATADV_PRINT_VID(tt_global
->common
.vid
), message
);
563 batadv_hash_remove(bat_priv
->tt
.global_hash
, batadv_compare_tt
,
564 batadv_choose_tt
, &tt_global
->common
);
565 batadv_tt_global_entry_put(tt_global
);
569 * batadv_tt_local_add - add a new client to the local table or update an
571 * @soft_iface: netdev struct of the mesh interface
572 * @addr: the mac address of the client to add
573 * @vid: VLAN identifier
574 * @ifindex: index of the interface where the client is connected to (useful to
575 * identify wireless clients)
576 * @mark: the value contained in the skb->mark field of the received packet (if
579 * Return: true if the client was successfully added, false otherwise.
581 bool batadv_tt_local_add(struct net_device
*soft_iface
, const u8
*addr
,
582 unsigned short vid
, int ifindex
, u32 mark
)
584 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
585 struct batadv_tt_local_entry
*tt_local
;
586 struct batadv_tt_global_entry
*tt_global
= NULL
;
587 struct net
*net
= dev_net(soft_iface
);
588 struct batadv_softif_vlan
*vlan
;
589 struct net_device
*in_dev
= NULL
;
590 struct hlist_head
*head
;
591 struct batadv_tt_orig_list_entry
*orig_entry
;
592 int hash_added
, table_size
, packet_size_max
;
594 bool roamed_back
= false;
598 if (ifindex
!= BATADV_NULL_IFINDEX
)
599 in_dev
= dev_get_by_index(net
, ifindex
);
601 tt_local
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
603 if (!is_multicast_ether_addr(addr
))
604 tt_global
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
607 tt_local
->last_seen
= jiffies
;
608 if (tt_local
->common
.flags
& BATADV_TT_CLIENT_PENDING
) {
609 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
610 "Re-adding pending client %pM (vid: %d)\n",
611 addr
, BATADV_PRINT_VID(vid
));
612 /* whatever the reason why the PENDING flag was set,
613 * this is a client which was enqueued to be removed in
614 * this orig_interval. Since it popped up again, the
615 * flag can be reset like it was never enqueued
617 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_PENDING
;
621 if (tt_local
->common
.flags
& BATADV_TT_CLIENT_ROAM
) {
622 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
623 "Roaming client %pM (vid: %d) came back to its original location\n",
624 addr
, BATADV_PRINT_VID(vid
));
625 /* the ROAM flag is set because this client roamed away
626 * and the node got a roaming_advertisement message. Now
627 * that the client popped up again at its original
628 * location such flag can be unset
630 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_ROAM
;
636 /* Ignore the client if we cannot send it in a full table response. */
637 table_size
= batadv_tt_local_table_transmit_size(bat_priv
);
638 table_size
+= batadv_tt_len(1);
639 packet_size_max
= atomic_read(&bat_priv
->packet_size_max
);
640 if (table_size
> packet_size_max
) {
641 net_ratelimited_function(batadv_info
, soft_iface
,
642 "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n",
643 table_size
, packet_size_max
, addr
);
647 tt_local
= kmalloc(sizeof(*tt_local
), GFP_ATOMIC
);
651 /* increase the refcounter of the related vlan */
652 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
653 if (WARN(!vlan
, "adding TT local entry %pM to non-existent VLAN %d",
654 addr
, BATADV_PRINT_VID(vid
))) {
660 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
661 "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n",
662 addr
, BATADV_PRINT_VID(vid
),
663 (u8
)atomic_read(&bat_priv
->tt
.vn
));
665 ether_addr_copy(tt_local
->common
.addr
, addr
);
666 /* The local entry has to be marked as NEW to avoid to send it in
667 * a full table response going out before the next ttvn increment
668 * (consistency check)
670 tt_local
->common
.flags
= BATADV_TT_CLIENT_NEW
;
671 tt_local
->common
.vid
= vid
;
672 if (batadv_is_wifi_netdev(in_dev
))
673 tt_local
->common
.flags
|= BATADV_TT_CLIENT_WIFI
;
674 kref_init(&tt_local
->common
.refcount
);
675 kref_get(&tt_local
->common
.refcount
);
676 tt_local
->last_seen
= jiffies
;
677 tt_local
->common
.added_at
= tt_local
->last_seen
;
678 tt_local
->vlan
= vlan
;
680 /* the batman interface mac and multicast addresses should never be
683 if (batadv_compare_eth(addr
, soft_iface
->dev_addr
) ||
684 is_multicast_ether_addr(addr
))
685 tt_local
->common
.flags
|= BATADV_TT_CLIENT_NOPURGE
;
687 hash_added
= batadv_hash_add(bat_priv
->tt
.local_hash
, batadv_compare_tt
,
688 batadv_choose_tt
, &tt_local
->common
,
689 &tt_local
->common
.hash_entry
);
691 if (unlikely(hash_added
!= 0)) {
692 /* remove the reference for the hash */
693 batadv_tt_local_entry_put(tt_local
);
694 batadv_softif_vlan_put(vlan
);
699 batadv_tt_local_event(bat_priv
, tt_local
, BATADV_NO_FLAGS
);
702 /* Check whether it is a roaming, but don't do anything if the roaming
703 * process has already been handled
705 if (tt_global
&& !(tt_global
->common
.flags
& BATADV_TT_CLIENT_ROAM
)) {
706 /* These node are probably going to update their tt table */
707 head
= &tt_global
->orig_list
;
709 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
710 batadv_send_roam_adv(bat_priv
, tt_global
->common
.addr
,
711 tt_global
->common
.vid
,
712 orig_entry
->orig_node
);
716 batadv_tt_global_free(bat_priv
, tt_global
,
720 /* The global entry has to be marked as ROAMING and
721 * has to be kept for consistency purpose
723 tt_global
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
724 tt_global
->roam_at
= jiffies
;
728 /* store the current remote flags before altering them. This helps
729 * understanding is flags are changing or not
731 remote_flags
= tt_local
->common
.flags
& BATADV_TT_REMOTE_MASK
;
733 if (batadv_is_wifi_netdev(in_dev
))
734 tt_local
->common
.flags
|= BATADV_TT_CLIENT_WIFI
;
736 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_WIFI
;
738 /* check the mark in the skb: if it's equal to the configured
739 * isolation_mark, it means the packet is coming from an isolated
742 match_mark
= (mark
& bat_priv
->isolation_mark_mask
);
743 if (bat_priv
->isolation_mark_mask
&&
744 match_mark
== bat_priv
->isolation_mark
)
745 tt_local
->common
.flags
|= BATADV_TT_CLIENT_ISOLA
;
747 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_ISOLA
;
749 /* if any "dynamic" flag has been modified, resend an ADD event for this
750 * entry so that all the nodes can get the new flags
752 if (remote_flags
^ (tt_local
->common
.flags
& BATADV_TT_REMOTE_MASK
))
753 batadv_tt_local_event(bat_priv
, tt_local
, BATADV_NO_FLAGS
);
760 batadv_tt_local_entry_put(tt_local
);
762 batadv_tt_global_entry_put(tt_global
);
767 * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send
768 * within a TT Response directed to another node
769 * @orig_node: originator for which the TT data has to be prepared
770 * @tt_data: uninitialised pointer to the address of the TVLV buffer
771 * @tt_change: uninitialised pointer to the address of the area where the TT
772 * changed can be stored
773 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
774 * function reserves the amount of space needed to send the entire global TT
775 * table. In case of success the value is updated with the real amount of
777 * Allocate the needed amount of memory for the entire TT TVLV and write its
778 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
779 * objects, one per active VLAN served by the originator node.
781 * Return: the size of the allocated buffer or 0 in case of failure.
784 batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node
*orig_node
,
785 struct batadv_tvlv_tt_data
**tt_data
,
786 struct batadv_tvlv_tt_change
**tt_change
,
793 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
794 struct batadv_orig_node_vlan
*vlan
;
798 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
) {
800 num_entries
+= atomic_read(&vlan
->tt
.num_entries
);
803 change_offset
= sizeof(**tt_data
);
804 change_offset
+= num_vlan
* sizeof(*tt_vlan
);
806 /* if tt_len is negative, allocate the space needed by the full table */
808 *tt_len
= batadv_tt_len(num_entries
);
811 tvlv_len
+= change_offset
;
813 *tt_data
= kmalloc(tvlv_len
, GFP_ATOMIC
);
819 (*tt_data
)->flags
= BATADV_NO_FLAGS
;
820 (*tt_data
)->ttvn
= atomic_read(&orig_node
->last_ttvn
);
821 (*tt_data
)->num_vlan
= htons(num_vlan
);
823 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(*tt_data
+ 1);
824 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
) {
825 tt_vlan
->vid
= htons(vlan
->vid
);
826 tt_vlan
->crc
= htonl(vlan
->tt
.crc
);
831 tt_change_ptr
= (u8
*)*tt_data
+ change_offset
;
832 *tt_change
= (struct batadv_tvlv_tt_change
*)tt_change_ptr
;
840 * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this
842 * @bat_priv: the bat priv with all the soft interface information
843 * @tt_data: uninitialised pointer to the address of the TVLV buffer
844 * @tt_change: uninitialised pointer to the address of the area where the TT
845 * changes can be stored
846 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
847 * function reserves the amount of space needed to send the entire local TT
848 * table. In case of success the value is updated with the real amount of
851 * Allocate the needed amount of memory for the entire TT TVLV and write its
852 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
853 * objects, one per active VLAN.
855 * Return: the size of the allocated buffer or 0 in case of failure.
858 batadv_tt_prepare_tvlv_local_data(struct batadv_priv
*bat_priv
,
859 struct batadv_tvlv_tt_data
**tt_data
,
860 struct batadv_tvlv_tt_change
**tt_change
,
863 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
864 struct batadv_softif_vlan
*vlan
;
872 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
874 num_entries
+= atomic_read(&vlan
->tt
.num_entries
);
877 change_offset
= sizeof(**tt_data
);
878 change_offset
+= num_vlan
* sizeof(*tt_vlan
);
880 /* if tt_len is negative, allocate the space needed by the full table */
882 *tt_len
= batadv_tt_len(num_entries
);
885 tvlv_len
+= change_offset
;
887 *tt_data
= kmalloc(tvlv_len
, GFP_ATOMIC
);
893 (*tt_data
)->flags
= BATADV_NO_FLAGS
;
894 (*tt_data
)->ttvn
= atomic_read(&bat_priv
->tt
.vn
);
895 (*tt_data
)->num_vlan
= htons(num_vlan
);
897 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(*tt_data
+ 1);
898 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
899 tt_vlan
->vid
= htons(vlan
->vid
);
900 tt_vlan
->crc
= htonl(vlan
->tt
.crc
);
905 tt_change_ptr
= (u8
*)*tt_data
+ change_offset
;
906 *tt_change
= (struct batadv_tvlv_tt_change
*)tt_change_ptr
;
914 * batadv_tt_tvlv_container_update - update the translation table tvlv container
915 * after local tt changes have been committed
916 * @bat_priv: the bat priv with all the soft interface information
918 static void batadv_tt_tvlv_container_update(struct batadv_priv
*bat_priv
)
920 struct batadv_tt_change_node
*entry
, *safe
;
921 struct batadv_tvlv_tt_data
*tt_data
;
922 struct batadv_tvlv_tt_change
*tt_change
;
923 int tt_diff_len
, tt_change_len
= 0;
924 int tt_diff_entries_num
= 0;
925 int tt_diff_entries_count
= 0;
928 tt_diff_entries_num
= atomic_read(&bat_priv
->tt
.local_changes
);
929 tt_diff_len
= batadv_tt_len(tt_diff_entries_num
);
931 /* if we have too many changes for one packet don't send any
932 * and wait for the tt table request which will be fragmented
934 if (tt_diff_len
> bat_priv
->soft_iface
->mtu
)
937 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
, &tt_data
,
938 &tt_change
, &tt_diff_len
);
942 tt_data
->flags
= BATADV_TT_OGM_DIFF
;
944 if (tt_diff_len
== 0)
945 goto container_register
;
947 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
948 atomic_set(&bat_priv
->tt
.local_changes
, 0);
950 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
952 if (tt_diff_entries_count
< tt_diff_entries_num
) {
953 memcpy(tt_change
+ tt_diff_entries_count
,
955 sizeof(struct batadv_tvlv_tt_change
));
956 tt_diff_entries_count
++;
958 list_del(&entry
->list
);
961 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
963 /* Keep the buffer for possible tt_request */
964 spin_lock_bh(&bat_priv
->tt
.last_changeset_lock
);
965 kfree(bat_priv
->tt
.last_changeset
);
966 bat_priv
->tt
.last_changeset_len
= 0;
967 bat_priv
->tt
.last_changeset
= NULL
;
968 tt_change_len
= batadv_tt_len(tt_diff_entries_count
);
969 /* check whether this new OGM has no changes due to size problems */
970 if (tt_diff_entries_count
> 0) {
971 /* if kmalloc() fails we will reply with the full table
972 * instead of providing the diff
974 bat_priv
->tt
.last_changeset
= kzalloc(tt_diff_len
, GFP_ATOMIC
);
975 if (bat_priv
->tt
.last_changeset
) {
976 memcpy(bat_priv
->tt
.last_changeset
,
977 tt_change
, tt_change_len
);
978 bat_priv
->tt
.last_changeset_len
= tt_diff_len
;
981 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
984 batadv_tvlv_container_register(bat_priv
, BATADV_TVLV_TT
, 1, tt_data
,
989 int batadv_tt_local_seq_print_text(struct seq_file
*seq
, void *offset
)
991 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
992 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
993 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
994 struct batadv_tt_common_entry
*tt_common_entry
;
995 struct batadv_tt_local_entry
*tt_local
;
996 struct batadv_hard_iface
*primary_if
;
997 struct hlist_head
*head
;
1001 int last_seen_msecs
;
1002 unsigned long last_seen_jiffies
;
1004 u16 np_flag
= BATADV_TT_CLIENT_NOPURGE
;
1006 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
1011 "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n",
1012 net_dev
->name
, (u8
)atomic_read(&bat_priv
->tt
.vn
));
1014 " Client VID Flags Last seen (CRC )\n");
1016 for (i
= 0; i
< hash
->size
; i
++) {
1017 head
= &hash
->table
[i
];
1020 hlist_for_each_entry_rcu(tt_common_entry
,
1022 tt_local
= container_of(tt_common_entry
,
1023 struct batadv_tt_local_entry
,
1025 vid
= tt_common_entry
->vid
;
1026 last_seen_jiffies
= jiffies
- tt_local
->last_seen
;
1027 last_seen_msecs
= jiffies_to_msecs(last_seen_jiffies
);
1028 last_seen_secs
= last_seen_msecs
/ 1000;
1029 last_seen_msecs
= last_seen_msecs
% 1000;
1031 no_purge
= tt_common_entry
->flags
& np_flag
;
1033 " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n",
1034 tt_common_entry
->addr
,
1035 BATADV_PRINT_VID(tt_common_entry
->vid
),
1036 ((tt_common_entry
->flags
&
1037 BATADV_TT_CLIENT_ROAM
) ? 'R' : '.'),
1038 no_purge
? 'P' : '.',
1039 ((tt_common_entry
->flags
&
1040 BATADV_TT_CLIENT_NEW
) ? 'N' : '.'),
1041 ((tt_common_entry
->flags
&
1042 BATADV_TT_CLIENT_PENDING
) ? 'X' : '.'),
1043 ((tt_common_entry
->flags
&
1044 BATADV_TT_CLIENT_WIFI
) ? 'W' : '.'),
1045 ((tt_common_entry
->flags
&
1046 BATADV_TT_CLIENT_ISOLA
) ? 'I' : '.'),
1047 no_purge
? 0 : last_seen_secs
,
1048 no_purge
? 0 : last_seen_msecs
,
1049 tt_local
->vlan
->tt
.crc
);
1055 batadv_hardif_put(primary_if
);
1060 batadv_tt_local_set_pending(struct batadv_priv
*bat_priv
,
1061 struct batadv_tt_local_entry
*tt_local_entry
,
1062 u16 flags
, const char *message
)
1064 batadv_tt_local_event(bat_priv
, tt_local_entry
, flags
);
1066 /* The local client has to be marked as "pending to be removed" but has
1067 * to be kept in the table in order to send it in a full table
1068 * response issued before the net ttvn increment (consistency check)
1070 tt_local_entry
->common
.flags
|= BATADV_TT_CLIENT_PENDING
;
1072 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1073 "Local tt entry (%pM, vid: %d) pending to be removed: %s\n",
1074 tt_local_entry
->common
.addr
,
1075 BATADV_PRINT_VID(tt_local_entry
->common
.vid
), message
);
1079 * batadv_tt_local_remove - logically remove an entry from the local table
1080 * @bat_priv: the bat priv with all the soft interface information
1081 * @addr: the MAC address of the client to remove
1082 * @vid: VLAN identifier
1083 * @message: message to append to the log on deletion
1084 * @roaming: true if the deletion is due to a roaming event
1086 * Return: the flags assigned to the local entry before being deleted
1088 u16
batadv_tt_local_remove(struct batadv_priv
*bat_priv
, const u8
*addr
,
1089 unsigned short vid
, const char *message
,
1092 struct batadv_tt_local_entry
*tt_local_entry
;
1093 u16 flags
, curr_flags
= BATADV_NO_FLAGS
;
1094 void *tt_entry_exists
;
1096 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
1097 if (!tt_local_entry
)
1100 curr_flags
= tt_local_entry
->common
.flags
;
1102 flags
= BATADV_TT_CLIENT_DEL
;
1103 /* if this global entry addition is due to a roaming, the node has to
1104 * mark the local entry as "roamed" in order to correctly reroute
1108 flags
|= BATADV_TT_CLIENT_ROAM
;
1109 /* mark the local client as ROAMed */
1110 tt_local_entry
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
1113 if (!(tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NEW
)) {
1114 batadv_tt_local_set_pending(bat_priv
, tt_local_entry
, flags
,
1118 /* if this client has been added right now, it is possible to
1119 * immediately purge it
1121 batadv_tt_local_event(bat_priv
, tt_local_entry
, BATADV_TT_CLIENT_DEL
);
1123 tt_entry_exists
= batadv_hash_remove(bat_priv
->tt
.local_hash
,
1126 &tt_local_entry
->common
);
1127 if (!tt_entry_exists
)
1130 /* extra call to free the local tt entry */
1131 batadv_tt_local_entry_put(tt_local_entry
);
1135 batadv_tt_local_entry_put(tt_local_entry
);
1141 * batadv_tt_local_purge_list - purge inactive tt local entries
1142 * @bat_priv: the bat priv with all the soft interface information
1143 * @head: pointer to the list containing the local tt entries
1144 * @timeout: parameter deciding whether a given tt local entry is considered
1147 static void batadv_tt_local_purge_list(struct batadv_priv
*bat_priv
,
1148 struct hlist_head
*head
,
1151 struct batadv_tt_local_entry
*tt_local_entry
;
1152 struct batadv_tt_common_entry
*tt_common_entry
;
1153 struct hlist_node
*node_tmp
;
1155 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
, head
,
1157 tt_local_entry
= container_of(tt_common_entry
,
1158 struct batadv_tt_local_entry
,
1160 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NOPURGE
)
1163 /* entry already marked for deletion */
1164 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
)
1167 if (!batadv_has_timed_out(tt_local_entry
->last_seen
, timeout
))
1170 batadv_tt_local_set_pending(bat_priv
, tt_local_entry
,
1171 BATADV_TT_CLIENT_DEL
, "timed out");
1176 * batadv_tt_local_purge - purge inactive tt local entries
1177 * @bat_priv: the bat priv with all the soft interface information
1178 * @timeout: parameter deciding whether a given tt local entry is considered
1181 static void batadv_tt_local_purge(struct batadv_priv
*bat_priv
,
1184 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
1185 struct hlist_head
*head
;
1186 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1189 for (i
= 0; i
< hash
->size
; i
++) {
1190 head
= &hash
->table
[i
];
1191 list_lock
= &hash
->list_locks
[i
];
1193 spin_lock_bh(list_lock
);
1194 batadv_tt_local_purge_list(bat_priv
, head
, timeout
);
1195 spin_unlock_bh(list_lock
);
1199 static void batadv_tt_local_table_free(struct batadv_priv
*bat_priv
)
1201 struct batadv_hashtable
*hash
;
1202 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1203 struct batadv_tt_common_entry
*tt_common_entry
;
1204 struct batadv_tt_local_entry
*tt_local
;
1205 struct hlist_node
*node_tmp
;
1206 struct hlist_head
*head
;
1209 if (!bat_priv
->tt
.local_hash
)
1212 hash
= bat_priv
->tt
.local_hash
;
1214 for (i
= 0; i
< hash
->size
; i
++) {
1215 head
= &hash
->table
[i
];
1216 list_lock
= &hash
->list_locks
[i
];
1218 spin_lock_bh(list_lock
);
1219 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
,
1221 hlist_del_rcu(&tt_common_entry
->hash_entry
);
1222 tt_local
= container_of(tt_common_entry
,
1223 struct batadv_tt_local_entry
,
1226 batadv_tt_local_entry_put(tt_local
);
1228 spin_unlock_bh(list_lock
);
1231 batadv_hash_destroy(hash
);
1233 bat_priv
->tt
.local_hash
= NULL
;
1236 static int batadv_tt_global_init(struct batadv_priv
*bat_priv
)
1238 if (bat_priv
->tt
.global_hash
)
1241 bat_priv
->tt
.global_hash
= batadv_hash_new(1024);
1243 if (!bat_priv
->tt
.global_hash
)
1246 batadv_hash_set_lock_class(bat_priv
->tt
.global_hash
,
1247 &batadv_tt_global_hash_lock_class_key
);
1252 static void batadv_tt_changes_list_free(struct batadv_priv
*bat_priv
)
1254 struct batadv_tt_change_node
*entry
, *safe
;
1256 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
1258 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
1260 list_del(&entry
->list
);
1264 atomic_set(&bat_priv
->tt
.local_changes
, 0);
1265 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
1269 * batadv_tt_global_orig_entry_find - find a TT orig_list_entry
1270 * @entry: the TT global entry where the orig_list_entry has to be
1272 * @orig_node: the originator for which the orig_list_entry has to be found
1274 * retrieve the orig_tt_list_entry belonging to orig_node from the
1275 * batadv_tt_global_entry list
1277 * Return: it with an increased refcounter, NULL if not found
1279 static struct batadv_tt_orig_list_entry
*
1280 batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry
*entry
,
1281 const struct batadv_orig_node
*orig_node
)
1283 struct batadv_tt_orig_list_entry
*tmp_orig_entry
, *orig_entry
= NULL
;
1284 const struct hlist_head
*head
;
1287 head
= &entry
->orig_list
;
1288 hlist_for_each_entry_rcu(tmp_orig_entry
, head
, list
) {
1289 if (tmp_orig_entry
->orig_node
!= orig_node
)
1291 if (!kref_get_unless_zero(&tmp_orig_entry
->refcount
))
1294 orig_entry
= tmp_orig_entry
;
1303 * batadv_tt_global_entry_has_orig - check if a TT global entry is also handled
1304 * by a given originator
1305 * @entry: the TT global entry to check
1306 * @orig_node: the originator to search in the list
1308 * find out if an orig_node is already in the list of a tt_global_entry.
1310 * Return: true if found, false otherwise
1313 batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry
*entry
,
1314 const struct batadv_orig_node
*orig_node
)
1316 struct batadv_tt_orig_list_entry
*orig_entry
;
1319 orig_entry
= batadv_tt_global_orig_entry_find(entry
, orig_node
);
1322 batadv_tt_orig_list_entry_put(orig_entry
);
1329 batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry
*tt_global
,
1330 struct batadv_orig_node
*orig_node
, int ttvn
)
1332 struct batadv_tt_orig_list_entry
*orig_entry
;
1334 orig_entry
= batadv_tt_global_orig_entry_find(tt_global
, orig_node
);
1336 /* refresh the ttvn: the current value could be a bogus one that
1337 * was added during a "temporary client detection"
1339 orig_entry
->ttvn
= ttvn
;
1343 orig_entry
= kzalloc(sizeof(*orig_entry
), GFP_ATOMIC
);
1347 INIT_HLIST_NODE(&orig_entry
->list
);
1348 kref_get(&orig_node
->refcount
);
1349 batadv_tt_global_size_inc(orig_node
, tt_global
->common
.vid
);
1350 orig_entry
->orig_node
= orig_node
;
1351 orig_entry
->ttvn
= ttvn
;
1352 kref_init(&orig_entry
->refcount
);
1353 kref_get(&orig_entry
->refcount
);
1355 spin_lock_bh(&tt_global
->list_lock
);
1356 hlist_add_head_rcu(&orig_entry
->list
,
1357 &tt_global
->orig_list
);
1358 spin_unlock_bh(&tt_global
->list_lock
);
1359 atomic_inc(&tt_global
->orig_list_count
);
1363 batadv_tt_orig_list_entry_put(orig_entry
);
1367 * batadv_tt_global_add - add a new TT global entry or update an existing one
1368 * @bat_priv: the bat priv with all the soft interface information
1369 * @orig_node: the originator announcing the client
1370 * @tt_addr: the mac address of the non-mesh client
1371 * @vid: VLAN identifier
1372 * @flags: TT flags that have to be set for this non-mesh client
1373 * @ttvn: the tt version number ever announcing this non-mesh client
1375 * Add a new TT global entry for the given originator. If the entry already
1376 * exists add a new reference to the given originator (a global entry can have
1377 * references to multiple originators) and adjust the flags attribute to reflect
1378 * the function argument.
1379 * If a TT local entry exists for this non-mesh client remove it.
1381 * The caller must hold orig_node refcount.
1383 * Return: true if the new entry has been added, false otherwise
1385 static bool batadv_tt_global_add(struct batadv_priv
*bat_priv
,
1386 struct batadv_orig_node
*orig_node
,
1387 const unsigned char *tt_addr
,
1388 unsigned short vid
, u16 flags
, u8 ttvn
)
1390 struct batadv_tt_global_entry
*tt_global_entry
;
1391 struct batadv_tt_local_entry
*tt_local_entry
;
1394 struct batadv_tt_common_entry
*common
;
1397 /* ignore global entries from backbone nodes */
1398 if (batadv_bla_is_backbone_gw_orig(bat_priv
, orig_node
->orig
, vid
))
1401 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, tt_addr
, vid
);
1402 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, tt_addr
, vid
);
1404 /* if the node already has a local client for this entry, it has to wait
1405 * for a roaming advertisement instead of manually messing up the global
1408 if ((flags
& BATADV_TT_CLIENT_TEMP
) && tt_local_entry
&&
1409 !(tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NEW
))
1412 if (!tt_global_entry
) {
1413 tt_global_entry
= kzalloc(sizeof(*tt_global_entry
), GFP_ATOMIC
);
1414 if (!tt_global_entry
)
1417 common
= &tt_global_entry
->common
;
1418 ether_addr_copy(common
->addr
, tt_addr
);
1421 common
->flags
= flags
;
1422 tt_global_entry
->roam_at
= 0;
1423 /* node must store current time in case of roaming. This is
1424 * needed to purge this entry out on timeout (if nobody claims
1427 if (flags
& BATADV_TT_CLIENT_ROAM
)
1428 tt_global_entry
->roam_at
= jiffies
;
1429 kref_init(&common
->refcount
);
1430 kref_get(&common
->refcount
);
1431 common
->added_at
= jiffies
;
1433 INIT_HLIST_HEAD(&tt_global_entry
->orig_list
);
1434 atomic_set(&tt_global_entry
->orig_list_count
, 0);
1435 spin_lock_init(&tt_global_entry
->list_lock
);
1437 hash_added
= batadv_hash_add(bat_priv
->tt
.global_hash
,
1439 batadv_choose_tt
, common
,
1440 &common
->hash_entry
);
1442 if (unlikely(hash_added
!= 0)) {
1443 /* remove the reference for the hash */
1444 batadv_tt_global_entry_put(tt_global_entry
);
1448 common
= &tt_global_entry
->common
;
1449 /* If there is already a global entry, we can use this one for
1451 * But if we are trying to add a temporary client then here are
1452 * two options at this point:
1453 * 1) the global client is not a temporary client: the global
1454 * client has to be left as it is, temporary information
1455 * should never override any already known client state
1456 * 2) the global client is a temporary client: purge the
1457 * originator list and add the new one orig_entry
1459 if (flags
& BATADV_TT_CLIENT_TEMP
) {
1460 if (!(common
->flags
& BATADV_TT_CLIENT_TEMP
))
1462 if (batadv_tt_global_entry_has_orig(tt_global_entry
,
1465 batadv_tt_global_del_orig_list(tt_global_entry
);
1466 goto add_orig_entry
;
1469 /* if the client was temporary added before receiving the first
1470 * OGM announcing it, we have to clear the TEMP flag. Also,
1471 * remove the previous temporary orig node and re-add it
1472 * if required. If the orig entry changed, the new one which
1473 * is a non-temporary entry is preferred.
1475 if (common
->flags
& BATADV_TT_CLIENT_TEMP
) {
1476 batadv_tt_global_del_orig_list(tt_global_entry
);
1477 common
->flags
&= ~BATADV_TT_CLIENT_TEMP
;
1480 /* the change can carry possible "attribute" flags like the
1481 * TT_CLIENT_WIFI, therefore they have to be copied in the
1484 common
->flags
|= flags
;
1486 /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only
1487 * one originator left in the list and we previously received a
1488 * delete + roaming change for this originator.
1490 * We should first delete the old originator before adding the
1493 if (common
->flags
& BATADV_TT_CLIENT_ROAM
) {
1494 batadv_tt_global_del_orig_list(tt_global_entry
);
1495 common
->flags
&= ~BATADV_TT_CLIENT_ROAM
;
1496 tt_global_entry
->roam_at
= 0;
1500 /* add the new orig_entry (if needed) or update it */
1501 batadv_tt_global_orig_entry_add(tt_global_entry
, orig_node
, ttvn
);
1503 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1504 "Creating new global tt entry: %pM (vid: %d, via %pM)\n",
1505 common
->addr
, BATADV_PRINT_VID(common
->vid
),
1510 /* Do not remove multicast addresses from the local hash on
1513 if (is_multicast_ether_addr(tt_addr
))
1516 /* remove address from local hash if present */
1517 local_flags
= batadv_tt_local_remove(bat_priv
, tt_addr
, vid
,
1518 "global tt received",
1519 flags
& BATADV_TT_CLIENT_ROAM
);
1520 tt_global_entry
->common
.flags
|= local_flags
& BATADV_TT_CLIENT_WIFI
;
1522 if (!(flags
& BATADV_TT_CLIENT_ROAM
))
1523 /* this is a normal global add. Therefore the client is not in a
1524 * roaming state anymore.
1526 tt_global_entry
->common
.flags
&= ~BATADV_TT_CLIENT_ROAM
;
1529 if (tt_global_entry
)
1530 batadv_tt_global_entry_put(tt_global_entry
);
1532 batadv_tt_local_entry_put(tt_local_entry
);
1537 * batadv_transtable_best_orig - Get best originator list entry from tt entry
1538 * @bat_priv: the bat priv with all the soft interface information
1539 * @tt_global_entry: global translation table entry to be analyzed
1541 * This functon assumes the caller holds rcu_read_lock().
1542 * Return: best originator list entry or NULL on errors.
1544 static struct batadv_tt_orig_list_entry
*
1545 batadv_transtable_best_orig(struct batadv_priv
*bat_priv
,
1546 struct batadv_tt_global_entry
*tt_global_entry
)
1548 struct batadv_neigh_node
*router
, *best_router
= NULL
;
1549 struct batadv_algo_ops
*bao
= bat_priv
->bat_algo_ops
;
1550 struct hlist_head
*head
;
1551 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
= NULL
;
1553 head
= &tt_global_entry
->orig_list
;
1554 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1555 router
= batadv_orig_router_get(orig_entry
->orig_node
,
1561 bao
->bat_neigh_cmp(router
, BATADV_IF_DEFAULT
,
1562 best_router
, BATADV_IF_DEFAULT
) <= 0) {
1563 batadv_neigh_node_put(router
);
1567 /* release the refcount for the "old" best */
1569 batadv_neigh_node_put(best_router
);
1571 best_entry
= orig_entry
;
1572 best_router
= router
;
1576 batadv_neigh_node_put(best_router
);
1582 * batadv_tt_global_print_entry - print all orig nodes who announce the address
1583 * for this global entry
1584 * @bat_priv: the bat priv with all the soft interface information
1585 * @tt_global_entry: global translation table entry to be printed
1586 * @seq: debugfs table seq_file struct
1588 * This functon assumes the caller holds rcu_read_lock().
1591 batadv_tt_global_print_entry(struct batadv_priv
*bat_priv
,
1592 struct batadv_tt_global_entry
*tt_global_entry
,
1593 struct seq_file
*seq
)
1595 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
;
1596 struct batadv_tt_common_entry
*tt_common_entry
;
1597 struct batadv_orig_node_vlan
*vlan
;
1598 struct hlist_head
*head
;
1602 tt_common_entry
= &tt_global_entry
->common
;
1603 flags
= tt_common_entry
->flags
;
1605 best_entry
= batadv_transtable_best_orig(bat_priv
, tt_global_entry
);
1607 vlan
= batadv_orig_node_vlan_get(best_entry
->orig_node
,
1608 tt_common_entry
->vid
);
1611 " * Cannot retrieve VLAN %d for originator %pM\n",
1612 BATADV_PRINT_VID(tt_common_entry
->vid
),
1613 best_entry
->orig_node
->orig
);
1617 last_ttvn
= atomic_read(&best_entry
->orig_node
->last_ttvn
);
1619 " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1620 '*', tt_global_entry
->common
.addr
,
1621 BATADV_PRINT_VID(tt_global_entry
->common
.vid
),
1622 best_entry
->ttvn
, best_entry
->orig_node
->orig
,
1623 last_ttvn
, vlan
->tt
.crc
,
1624 ((flags
& BATADV_TT_CLIENT_ROAM
) ? 'R' : '.'),
1625 ((flags
& BATADV_TT_CLIENT_WIFI
) ? 'W' : '.'),
1626 ((flags
& BATADV_TT_CLIENT_ISOLA
) ? 'I' : '.'),
1627 ((flags
& BATADV_TT_CLIENT_TEMP
) ? 'T' : '.'));
1629 batadv_orig_node_vlan_put(vlan
);
1633 head
= &tt_global_entry
->orig_list
;
1635 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1636 if (best_entry
== orig_entry
)
1639 vlan
= batadv_orig_node_vlan_get(orig_entry
->orig_node
,
1640 tt_common_entry
->vid
);
1643 " + Cannot retrieve VLAN %d for originator %pM\n",
1644 BATADV_PRINT_VID(tt_common_entry
->vid
),
1645 orig_entry
->orig_node
->orig
);
1649 last_ttvn
= atomic_read(&orig_entry
->orig_node
->last_ttvn
);
1651 " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1652 '+', tt_global_entry
->common
.addr
,
1653 BATADV_PRINT_VID(tt_global_entry
->common
.vid
),
1654 orig_entry
->ttvn
, orig_entry
->orig_node
->orig
,
1655 last_ttvn
, vlan
->tt
.crc
,
1656 ((flags
& BATADV_TT_CLIENT_ROAM
) ? 'R' : '.'),
1657 ((flags
& BATADV_TT_CLIENT_WIFI
) ? 'W' : '.'),
1658 ((flags
& BATADV_TT_CLIENT_ISOLA
) ? 'I' : '.'),
1659 ((flags
& BATADV_TT_CLIENT_TEMP
) ? 'T' : '.'));
1661 batadv_orig_node_vlan_put(vlan
);
1665 int batadv_tt_global_seq_print_text(struct seq_file
*seq
, void *offset
)
1667 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1668 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
1669 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
1670 struct batadv_tt_common_entry
*tt_common_entry
;
1671 struct batadv_tt_global_entry
*tt_global
;
1672 struct batadv_hard_iface
*primary_if
;
1673 struct hlist_head
*head
;
1676 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
1681 "Globally announced TT entries received via the mesh %s\n",
1684 " Client VID (TTVN) Originator (Curr TTVN) (CRC ) Flags\n");
1686 for (i
= 0; i
< hash
->size
; i
++) {
1687 head
= &hash
->table
[i
];
1690 hlist_for_each_entry_rcu(tt_common_entry
,
1692 tt_global
= container_of(tt_common_entry
,
1693 struct batadv_tt_global_entry
,
1695 batadv_tt_global_print_entry(bat_priv
, tt_global
, seq
);
1701 batadv_hardif_put(primary_if
);
1706 * _batadv_tt_global_del_orig_entry - remove and free an orig_entry
1707 * @tt_global_entry: the global entry to remove the orig_entry from
1708 * @orig_entry: the orig entry to remove and free
1710 * Remove an orig_entry from its list in the given tt_global_entry and
1711 * free this orig_entry afterwards.
1713 * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is
1717 _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry
*tt_global_entry
,
1718 struct batadv_tt_orig_list_entry
*orig_entry
)
1720 lockdep_assert_held(&tt_global_entry
->list_lock
);
1722 batadv_tt_global_size_dec(orig_entry
->orig_node
,
1723 tt_global_entry
->common
.vid
);
1724 atomic_dec(&tt_global_entry
->orig_list_count
);
1725 /* requires holding tt_global_entry->list_lock and orig_entry->list
1726 * being part of a list
1728 hlist_del_rcu(&orig_entry
->list
);
1729 batadv_tt_orig_list_entry_put(orig_entry
);
1732 /* deletes the orig list of a tt_global_entry */
1734 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry
*tt_global_entry
)
1736 struct hlist_head
*head
;
1737 struct hlist_node
*safe
;
1738 struct batadv_tt_orig_list_entry
*orig_entry
;
1740 spin_lock_bh(&tt_global_entry
->list_lock
);
1741 head
= &tt_global_entry
->orig_list
;
1742 hlist_for_each_entry_safe(orig_entry
, safe
, head
, list
)
1743 _batadv_tt_global_del_orig_entry(tt_global_entry
, orig_entry
);
1744 spin_unlock_bh(&tt_global_entry
->list_lock
);
1748 * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry
1749 * @bat_priv: the bat priv with all the soft interface information
1750 * @tt_global_entry: the global entry to remove the orig_node from
1751 * @orig_node: the originator announcing the client
1752 * @message: message to append to the log on deletion
1754 * Remove the given orig_node and its according orig_entry from the given
1758 batadv_tt_global_del_orig_node(struct batadv_priv
*bat_priv
,
1759 struct batadv_tt_global_entry
*tt_global_entry
,
1760 struct batadv_orig_node
*orig_node
,
1761 const char *message
)
1763 struct hlist_head
*head
;
1764 struct hlist_node
*safe
;
1765 struct batadv_tt_orig_list_entry
*orig_entry
;
1768 spin_lock_bh(&tt_global_entry
->list_lock
);
1769 head
= &tt_global_entry
->orig_list
;
1770 hlist_for_each_entry_safe(orig_entry
, safe
, head
, list
) {
1771 if (orig_entry
->orig_node
== orig_node
) {
1772 vid
= tt_global_entry
->common
.vid
;
1773 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1774 "Deleting %pM from global tt entry %pM (vid: %d): %s\n",
1776 tt_global_entry
->common
.addr
,
1777 BATADV_PRINT_VID(vid
), message
);
1778 _batadv_tt_global_del_orig_entry(tt_global_entry
,
1782 spin_unlock_bh(&tt_global_entry
->list_lock
);
1785 /* If the client is to be deleted, we check if it is the last origantor entry
1786 * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the
1787 * timer, otherwise we simply remove the originator scheduled for deletion.
1790 batadv_tt_global_del_roaming(struct batadv_priv
*bat_priv
,
1791 struct batadv_tt_global_entry
*tt_global_entry
,
1792 struct batadv_orig_node
*orig_node
,
1793 const char *message
)
1795 bool last_entry
= true;
1796 struct hlist_head
*head
;
1797 struct batadv_tt_orig_list_entry
*orig_entry
;
1799 /* no local entry exists, case 1:
1800 * Check if this is the last one or if other entries exist.
1804 head
= &tt_global_entry
->orig_list
;
1805 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1806 if (orig_entry
->orig_node
!= orig_node
) {
1814 /* its the last one, mark for roaming. */
1815 tt_global_entry
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
1816 tt_global_entry
->roam_at
= jiffies
;
1818 /* there is another entry, we can simply delete this
1819 * one and can still use the other one.
1821 batadv_tt_global_del_orig_node(bat_priv
, tt_global_entry
,
1822 orig_node
, message
);
1826 * batadv_tt_global_del - remove a client from the global table
1827 * @bat_priv: the bat priv with all the soft interface information
1828 * @orig_node: an originator serving this client
1829 * @addr: the mac address of the client
1830 * @vid: VLAN identifier
1831 * @message: a message explaining the reason for deleting the client to print
1832 * for debugging purpose
1833 * @roaming: true if the deletion has been triggered by a roaming event
1835 static void batadv_tt_global_del(struct batadv_priv
*bat_priv
,
1836 struct batadv_orig_node
*orig_node
,
1837 const unsigned char *addr
, unsigned short vid
,
1838 const char *message
, bool roaming
)
1840 struct batadv_tt_global_entry
*tt_global_entry
;
1841 struct batadv_tt_local_entry
*local_entry
= NULL
;
1843 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
1844 if (!tt_global_entry
)
1848 batadv_tt_global_del_orig_node(bat_priv
, tt_global_entry
,
1849 orig_node
, message
);
1851 if (hlist_empty(&tt_global_entry
->orig_list
))
1852 batadv_tt_global_free(bat_priv
, tt_global_entry
,
1858 /* if we are deleting a global entry due to a roam
1859 * event, there are two possibilities:
1860 * 1) the client roamed from node A to node B => if there
1861 * is only one originator left for this client, we mark
1862 * it with BATADV_TT_CLIENT_ROAM, we start a timer and we
1863 * wait for node B to claim it. In case of timeout
1864 * the entry is purged.
1866 * If there are other originators left, we directly delete
1868 * 2) the client roamed to us => we can directly delete
1869 * the global entry, since it is useless now.
1871 local_entry
= batadv_tt_local_hash_find(bat_priv
,
1872 tt_global_entry
->common
.addr
,
1875 /* local entry exists, case 2: client roamed to us. */
1876 batadv_tt_global_del_orig_list(tt_global_entry
);
1877 batadv_tt_global_free(bat_priv
, tt_global_entry
, message
);
1879 /* no local entry exists, case 1: check for roaming */
1880 batadv_tt_global_del_roaming(bat_priv
, tt_global_entry
,
1881 orig_node
, message
);
1884 if (tt_global_entry
)
1885 batadv_tt_global_entry_put(tt_global_entry
);
1887 batadv_tt_local_entry_put(local_entry
);
1891 * batadv_tt_global_del_orig - remove all the TT global entries belonging to the
1892 * given originator matching the provided vid
1893 * @bat_priv: the bat priv with all the soft interface information
1894 * @orig_node: the originator owning the entries to remove
1895 * @match_vid: the VLAN identifier to match. If negative all the entries will be
1897 * @message: debug message to print as "reason"
1899 void batadv_tt_global_del_orig(struct batadv_priv
*bat_priv
,
1900 struct batadv_orig_node
*orig_node
,
1902 const char *message
)
1904 struct batadv_tt_global_entry
*tt_global
;
1905 struct batadv_tt_common_entry
*tt_common_entry
;
1907 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
1908 struct hlist_node
*safe
;
1909 struct hlist_head
*head
;
1910 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1916 for (i
= 0; i
< hash
->size
; i
++) {
1917 head
= &hash
->table
[i
];
1918 list_lock
= &hash
->list_locks
[i
];
1920 spin_lock_bh(list_lock
);
1921 hlist_for_each_entry_safe(tt_common_entry
, safe
,
1923 /* remove only matching entries */
1924 if (match_vid
>= 0 && tt_common_entry
->vid
!= match_vid
)
1927 tt_global
= container_of(tt_common_entry
,
1928 struct batadv_tt_global_entry
,
1931 batadv_tt_global_del_orig_node(bat_priv
, tt_global
,
1932 orig_node
, message
);
1934 if (hlist_empty(&tt_global
->orig_list
)) {
1935 vid
= tt_global
->common
.vid
;
1936 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1937 "Deleting global tt entry %pM (vid: %d): %s\n",
1938 tt_global
->common
.addr
,
1939 BATADV_PRINT_VID(vid
), message
);
1940 hlist_del_rcu(&tt_common_entry
->hash_entry
);
1941 batadv_tt_global_entry_put(tt_global
);
1944 spin_unlock_bh(list_lock
);
1946 clear_bit(BATADV_ORIG_CAPA_HAS_TT
, &orig_node
->capa_initialized
);
1949 static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry
*tt_global
,
1953 unsigned long roam_timeout
= BATADV_TT_CLIENT_ROAM_TIMEOUT
;
1954 unsigned long temp_timeout
= BATADV_TT_CLIENT_TEMP_TIMEOUT
;
1956 if ((tt_global
->common
.flags
& BATADV_TT_CLIENT_ROAM
) &&
1957 batadv_has_timed_out(tt_global
->roam_at
, roam_timeout
)) {
1959 *msg
= "Roaming timeout\n";
1962 if ((tt_global
->common
.flags
& BATADV_TT_CLIENT_TEMP
) &&
1963 batadv_has_timed_out(tt_global
->common
.added_at
, temp_timeout
)) {
1965 *msg
= "Temporary client timeout\n";
1971 static void batadv_tt_global_purge(struct batadv_priv
*bat_priv
)
1973 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
1974 struct hlist_head
*head
;
1975 struct hlist_node
*node_tmp
;
1976 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1979 struct batadv_tt_common_entry
*tt_common
;
1980 struct batadv_tt_global_entry
*tt_global
;
1982 for (i
= 0; i
< hash
->size
; i
++) {
1983 head
= &hash
->table
[i
];
1984 list_lock
= &hash
->list_locks
[i
];
1986 spin_lock_bh(list_lock
);
1987 hlist_for_each_entry_safe(tt_common
, node_tmp
, head
,
1989 tt_global
= container_of(tt_common
,
1990 struct batadv_tt_global_entry
,
1993 if (!batadv_tt_global_to_purge(tt_global
, &msg
))
1996 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1997 "Deleting global tt entry %pM (vid: %d): %s\n",
1998 tt_global
->common
.addr
,
1999 BATADV_PRINT_VID(tt_global
->common
.vid
),
2002 hlist_del_rcu(&tt_common
->hash_entry
);
2004 batadv_tt_global_entry_put(tt_global
);
2006 spin_unlock_bh(list_lock
);
2010 static void batadv_tt_global_table_free(struct batadv_priv
*bat_priv
)
2012 struct batadv_hashtable
*hash
;
2013 spinlock_t
*list_lock
; /* protects write access to the hash lists */
2014 struct batadv_tt_common_entry
*tt_common_entry
;
2015 struct batadv_tt_global_entry
*tt_global
;
2016 struct hlist_node
*node_tmp
;
2017 struct hlist_head
*head
;
2020 if (!bat_priv
->tt
.global_hash
)
2023 hash
= bat_priv
->tt
.global_hash
;
2025 for (i
= 0; i
< hash
->size
; i
++) {
2026 head
= &hash
->table
[i
];
2027 list_lock
= &hash
->list_locks
[i
];
2029 spin_lock_bh(list_lock
);
2030 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
,
2032 hlist_del_rcu(&tt_common_entry
->hash_entry
);
2033 tt_global
= container_of(tt_common_entry
,
2034 struct batadv_tt_global_entry
,
2036 batadv_tt_global_entry_put(tt_global
);
2038 spin_unlock_bh(list_lock
);
2041 batadv_hash_destroy(hash
);
2043 bat_priv
->tt
.global_hash
= NULL
;
2047 _batadv_is_ap_isolated(struct batadv_tt_local_entry
*tt_local_entry
,
2048 struct batadv_tt_global_entry
*tt_global_entry
)
2052 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_WIFI
&&
2053 tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_WIFI
)
2056 /* check if the two clients are marked as isolated */
2057 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ISOLA
&&
2058 tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_ISOLA
)
2065 * batadv_transtable_search - get the mesh destination for a given client
2066 * @bat_priv: the bat priv with all the soft interface information
2067 * @src: mac address of the source client
2068 * @addr: mac address of the destination client
2069 * @vid: VLAN identifier
2071 * Return: a pointer to the originator that was selected as destination in the
2072 * mesh for contacting the client 'addr', NULL otherwise.
2073 * In case of multiple originators serving the same client, the function returns
2074 * the best one (best in terms of metric towards the destination node).
2076 * If the two clients are AP isolated the function returns NULL.
2078 struct batadv_orig_node
*batadv_transtable_search(struct batadv_priv
*bat_priv
,
2083 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
2084 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
2085 struct batadv_orig_node
*orig_node
= NULL
;
2086 struct batadv_tt_orig_list_entry
*best_entry
;
2088 if (src
&& batadv_vlan_ap_isola_get(bat_priv
, vid
)) {
2089 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, src
, vid
);
2090 if (!tt_local_entry
||
2091 (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
))
2095 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
2096 if (!tt_global_entry
)
2099 /* check whether the clients should not communicate due to AP
2102 if (tt_local_entry
&&
2103 _batadv_is_ap_isolated(tt_local_entry
, tt_global_entry
))
2107 best_entry
= batadv_transtable_best_orig(bat_priv
, tt_global_entry
);
2108 /* found anything? */
2110 orig_node
= best_entry
->orig_node
;
2111 if (orig_node
&& !kref_get_unless_zero(&orig_node
->refcount
))
2116 if (tt_global_entry
)
2117 batadv_tt_global_entry_put(tt_global_entry
);
2119 batadv_tt_local_entry_put(tt_local_entry
);
2125 * batadv_tt_global_crc - calculates the checksum of the local table belonging
2126 * to the given orig_node
2127 * @bat_priv: the bat priv with all the soft interface information
2128 * @orig_node: originator for which the CRC should be computed
2129 * @vid: VLAN identifier for which the CRC32 has to be computed
2131 * This function computes the checksum for the global table corresponding to a
2132 * specific originator. In particular, the checksum is computed as follows: For
2133 * each client connected to the originator the CRC32C of the MAC address and the
2134 * VID is computed and then all the CRC32Cs of the various clients are xor'ed
2137 * The idea behind is that CRC32C should be used as much as possible in order to
2138 * produce a unique hash of the table, but since the order which is used to feed
2139 * the CRC32C function affects the result and since every node in the network
2140 * probably sorts the clients differently, the hash function cannot be directly
2141 * computed over the entire table. Hence the CRC32C is used only on
2142 * the single client entry, while all the results are then xor'ed together
2143 * because the XOR operation can combine them all while trying to reduce the
2144 * noise as much as possible.
2146 * Return: the checksum of the global table of a given originator.
2148 static u32
batadv_tt_global_crc(struct batadv_priv
*bat_priv
,
2149 struct batadv_orig_node
*orig_node
,
2152 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
2153 struct batadv_tt_common_entry
*tt_common
;
2154 struct batadv_tt_global_entry
*tt_global
;
2155 struct hlist_head
*head
;
2156 u32 i
, crc_tmp
, crc
= 0;
2160 for (i
= 0; i
< hash
->size
; i
++) {
2161 head
= &hash
->table
[i
];
2164 hlist_for_each_entry_rcu(tt_common
, head
, hash_entry
) {
2165 tt_global
= container_of(tt_common
,
2166 struct batadv_tt_global_entry
,
2168 /* compute the CRC only for entries belonging to the
2169 * VLAN identified by the vid passed as parameter
2171 if (tt_common
->vid
!= vid
)
2174 /* Roaming clients are in the global table for
2175 * consistency only. They don't have to be
2176 * taken into account while computing the
2179 if (tt_common
->flags
& BATADV_TT_CLIENT_ROAM
)
2181 /* Temporary clients have not been announced yet, so
2182 * they have to be skipped while computing the global
2185 if (tt_common
->flags
& BATADV_TT_CLIENT_TEMP
)
2188 /* find out if this global entry is announced by this
2191 if (!batadv_tt_global_entry_has_orig(tt_global
,
2195 /* use network order to read the VID: this ensures that
2196 * every node reads the bytes in the same order.
2198 tmp_vid
= htons(tt_common
->vid
);
2199 crc_tmp
= crc32c(0, &tmp_vid
, sizeof(tmp_vid
));
2201 /* compute the CRC on flags that have to be kept in sync
2204 flags
= tt_common
->flags
& BATADV_TT_SYNC_MASK
;
2205 crc_tmp
= crc32c(crc_tmp
, &flags
, sizeof(flags
));
2207 crc
^= crc32c(crc_tmp
, tt_common
->addr
, ETH_ALEN
);
2216 * batadv_tt_local_crc - calculates the checksum of the local table
2217 * @bat_priv: the bat priv with all the soft interface information
2218 * @vid: VLAN identifier for which the CRC32 has to be computed
2220 * For details about the computation, please refer to the documentation for
2221 * batadv_tt_global_crc().
2223 * Return: the checksum of the local table
2225 static u32
batadv_tt_local_crc(struct batadv_priv
*bat_priv
,
2228 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
2229 struct batadv_tt_common_entry
*tt_common
;
2230 struct hlist_head
*head
;
2231 u32 i
, crc_tmp
, crc
= 0;
2235 for (i
= 0; i
< hash
->size
; i
++) {
2236 head
= &hash
->table
[i
];
2239 hlist_for_each_entry_rcu(tt_common
, head
, hash_entry
) {
2240 /* compute the CRC only for entries belonging to the
2241 * VLAN identified by vid
2243 if (tt_common
->vid
!= vid
)
2246 /* not yet committed clients have not to be taken into
2247 * account while computing the CRC
2249 if (tt_common
->flags
& BATADV_TT_CLIENT_NEW
)
2252 /* use network order to read the VID: this ensures that
2253 * every node reads the bytes in the same order.
2255 tmp_vid
= htons(tt_common
->vid
);
2256 crc_tmp
= crc32c(0, &tmp_vid
, sizeof(tmp_vid
));
2258 /* compute the CRC on flags that have to be kept in sync
2261 flags
= tt_common
->flags
& BATADV_TT_SYNC_MASK
;
2262 crc_tmp
= crc32c(crc_tmp
, &flags
, sizeof(flags
));
2264 crc
^= crc32c(crc_tmp
, tt_common
->addr
, ETH_ALEN
);
2272 static void batadv_tt_req_list_free(struct batadv_priv
*bat_priv
)
2274 struct batadv_tt_req_node
*node
;
2275 struct hlist_node
*safe
;
2277 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2279 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
2280 hlist_del_init(&node
->list
);
2284 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2287 static void batadv_tt_save_orig_buffer(struct batadv_priv
*bat_priv
,
2288 struct batadv_orig_node
*orig_node
,
2289 const void *tt_buff
,
2292 /* Replace the old buffer only if I received something in the
2293 * last OGM (the OGM could carry no changes)
2295 spin_lock_bh(&orig_node
->tt_buff_lock
);
2296 if (tt_buff_len
> 0) {
2297 kfree(orig_node
->tt_buff
);
2298 orig_node
->tt_buff_len
= 0;
2299 orig_node
->tt_buff
= kmalloc(tt_buff_len
, GFP_ATOMIC
);
2300 if (orig_node
->tt_buff
) {
2301 memcpy(orig_node
->tt_buff
, tt_buff
, tt_buff_len
);
2302 orig_node
->tt_buff_len
= tt_buff_len
;
2305 spin_unlock_bh(&orig_node
->tt_buff_lock
);
2308 static void batadv_tt_req_purge(struct batadv_priv
*bat_priv
)
2310 struct batadv_tt_req_node
*node
;
2311 struct hlist_node
*safe
;
2313 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2314 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
2315 if (batadv_has_timed_out(node
->issued_at
,
2316 BATADV_TT_REQUEST_TIMEOUT
)) {
2317 hlist_del_init(&node
->list
);
2321 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2325 * batadv_tt_req_node_new - search and possibly create a tt_req_node object
2326 * @bat_priv: the bat priv with all the soft interface information
2327 * @orig_node: orig node this request is being issued for
2329 * Return: the pointer to the new tt_req_node struct if no request
2330 * has already been issued for this orig_node, NULL otherwise.
2332 static struct batadv_tt_req_node
*
2333 batadv_tt_req_node_new(struct batadv_priv
*bat_priv
,
2334 struct batadv_orig_node
*orig_node
)
2336 struct batadv_tt_req_node
*tt_req_node_tmp
, *tt_req_node
= NULL
;
2338 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2339 hlist_for_each_entry(tt_req_node_tmp
, &bat_priv
->tt
.req_list
, list
) {
2340 if (batadv_compare_eth(tt_req_node_tmp
, orig_node
) &&
2341 !batadv_has_timed_out(tt_req_node_tmp
->issued_at
,
2342 BATADV_TT_REQUEST_TIMEOUT
))
2346 tt_req_node
= kmalloc(sizeof(*tt_req_node
), GFP_ATOMIC
);
2350 ether_addr_copy(tt_req_node
->addr
, orig_node
->orig
);
2351 tt_req_node
->issued_at
= jiffies
;
2353 hlist_add_head(&tt_req_node
->list
, &bat_priv
->tt
.req_list
);
2355 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2360 * batadv_tt_local_valid - verify that given tt entry is a valid one
2361 * @entry_ptr: to be checked local tt entry
2362 * @data_ptr: not used but definition required to satisfy the callback prototype
2364 * Return: true if the entry is a valid, false otherwise.
2366 static bool batadv_tt_local_valid(const void *entry_ptr
, const void *data_ptr
)
2368 const struct batadv_tt_common_entry
*tt_common_entry
= entry_ptr
;
2370 if (tt_common_entry
->flags
& BATADV_TT_CLIENT_NEW
)
2375 static bool batadv_tt_global_valid(const void *entry_ptr
,
2376 const void *data_ptr
)
2378 const struct batadv_tt_common_entry
*tt_common_entry
= entry_ptr
;
2379 const struct batadv_tt_global_entry
*tt_global_entry
;
2380 const struct batadv_orig_node
*orig_node
= data_ptr
;
2382 if (tt_common_entry
->flags
& BATADV_TT_CLIENT_ROAM
||
2383 tt_common_entry
->flags
& BATADV_TT_CLIENT_TEMP
)
2386 tt_global_entry
= container_of(tt_common_entry
,
2387 struct batadv_tt_global_entry
,
2390 return batadv_tt_global_entry_has_orig(tt_global_entry
, orig_node
);
2394 * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the
2396 * @bat_priv: the bat priv with all the soft interface information
2397 * @hash: hash table containing the tt entries
2398 * @tt_len: expected tvlv tt data buffer length in number of bytes
2399 * @tvlv_buff: pointer to the buffer to fill with the TT data
2400 * @valid_cb: function to filter tt change entries
2401 * @cb_data: data passed to the filter function as argument
2403 static void batadv_tt_tvlv_generate(struct batadv_priv
*bat_priv
,
2404 struct batadv_hashtable
*hash
,
2405 void *tvlv_buff
, u16 tt_len
,
2406 bool (*valid_cb
)(const void *,
2410 struct batadv_tt_common_entry
*tt_common_entry
;
2411 struct batadv_tvlv_tt_change
*tt_change
;
2412 struct hlist_head
*head
;
2413 u16 tt_tot
, tt_num_entries
= 0;
2416 tt_tot
= batadv_tt_entries(tt_len
);
2417 tt_change
= (struct batadv_tvlv_tt_change
*)tvlv_buff
;
2420 for (i
= 0; i
< hash
->size
; i
++) {
2421 head
= &hash
->table
[i
];
2423 hlist_for_each_entry_rcu(tt_common_entry
,
2425 if (tt_tot
== tt_num_entries
)
2428 if ((valid_cb
) && (!valid_cb(tt_common_entry
, cb_data
)))
2431 ether_addr_copy(tt_change
->addr
, tt_common_entry
->addr
);
2432 tt_change
->flags
= tt_common_entry
->flags
;
2433 tt_change
->vid
= htons(tt_common_entry
->vid
);
2434 memset(tt_change
->reserved
, 0,
2435 sizeof(tt_change
->reserved
));
2445 * batadv_tt_global_check_crc - check if all the CRCs are correct
2446 * @orig_node: originator for which the CRCs have to be checked
2447 * @tt_vlan: pointer to the first tvlv VLAN entry
2448 * @num_vlan: number of tvlv VLAN entries
2450 * Return: true if all the received CRCs match the locally stored ones, false
2453 static bool batadv_tt_global_check_crc(struct batadv_orig_node
*orig_node
,
2454 struct batadv_tvlv_tt_vlan_data
*tt_vlan
,
2457 struct batadv_tvlv_tt_vlan_data
*tt_vlan_tmp
;
2458 struct batadv_orig_node_vlan
*vlan
;
2459 int i
, orig_num_vlan
;
2462 /* check if each received CRC matches the locally stored one */
2463 for (i
= 0; i
< num_vlan
; i
++) {
2464 tt_vlan_tmp
= tt_vlan
+ i
;
2466 /* if orig_node is a backbone node for this VLAN, don't check
2467 * the CRC as we ignore all the global entries over it
2469 if (batadv_bla_is_backbone_gw_orig(orig_node
->bat_priv
,
2471 ntohs(tt_vlan_tmp
->vid
)))
2474 vlan
= batadv_orig_node_vlan_get(orig_node
,
2475 ntohs(tt_vlan_tmp
->vid
));
2480 batadv_orig_node_vlan_put(vlan
);
2482 if (crc
!= ntohl(tt_vlan_tmp
->crc
))
2486 /* check if any excess VLANs exist locally for the originator
2487 * which are not mentioned in the TVLV from the originator.
2491 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
)
2495 if (orig_num_vlan
> num_vlan
)
2502 * batadv_tt_local_update_crc - update all the local CRCs
2503 * @bat_priv: the bat priv with all the soft interface information
2505 static void batadv_tt_local_update_crc(struct batadv_priv
*bat_priv
)
2507 struct batadv_softif_vlan
*vlan
;
2509 /* recompute the global CRC for each VLAN */
2511 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
2512 vlan
->tt
.crc
= batadv_tt_local_crc(bat_priv
, vlan
->vid
);
2518 * batadv_tt_global_update_crc - update all the global CRCs for this orig_node
2519 * @bat_priv: the bat priv with all the soft interface information
2520 * @orig_node: the orig_node for which the CRCs have to be updated
2522 static void batadv_tt_global_update_crc(struct batadv_priv
*bat_priv
,
2523 struct batadv_orig_node
*orig_node
)
2525 struct batadv_orig_node_vlan
*vlan
;
2528 /* recompute the global CRC for each VLAN */
2530 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
) {
2531 /* if orig_node is a backbone node for this VLAN, don't compute
2532 * the CRC as we ignore all the global entries over it
2534 if (batadv_bla_is_backbone_gw_orig(bat_priv
, orig_node
->orig
,
2538 crc
= batadv_tt_global_crc(bat_priv
, orig_node
, vlan
->vid
);
2545 * batadv_send_tt_request - send a TT Request message to a given node
2546 * @bat_priv: the bat priv with all the soft interface information
2547 * @dst_orig_node: the destination of the message
2548 * @ttvn: the version number that the source of the message is looking for
2549 * @tt_vlan: pointer to the first tvlv VLAN object to request
2550 * @num_vlan: number of tvlv VLAN entries
2551 * @full_table: ask for the entire translation table if true, while only for the
2552 * last TT diff otherwise
2554 * Return: true if the TT Request was sent, false otherwise
2556 static bool batadv_send_tt_request(struct batadv_priv
*bat_priv
,
2557 struct batadv_orig_node
*dst_orig_node
,
2559 struct batadv_tvlv_tt_vlan_data
*tt_vlan
,
2560 u16 num_vlan
, bool full_table
)
2562 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
2563 struct batadv_tt_req_node
*tt_req_node
= NULL
;
2564 struct batadv_tvlv_tt_vlan_data
*tt_vlan_req
;
2565 struct batadv_hard_iface
*primary_if
;
2569 primary_if
= batadv_primary_if_get_selected(bat_priv
);
2573 /* The new tt_req will be issued only if I'm not waiting for a
2574 * reply from the same orig_node yet
2576 tt_req_node
= batadv_tt_req_node_new(bat_priv
, dst_orig_node
);
2580 size
= sizeof(*tvlv_tt_data
) + sizeof(*tt_vlan_req
) * num_vlan
;
2581 tvlv_tt_data
= kzalloc(size
, GFP_ATOMIC
);
2585 tvlv_tt_data
->flags
= BATADV_TT_REQUEST
;
2586 tvlv_tt_data
->ttvn
= ttvn
;
2587 tvlv_tt_data
->num_vlan
= htons(num_vlan
);
2589 /* send all the CRCs within the request. This is needed by intermediate
2590 * nodes to ensure they have the correct table before replying
2592 tt_vlan_req
= (struct batadv_tvlv_tt_vlan_data
*)(tvlv_tt_data
+ 1);
2593 for (i
= 0; i
< num_vlan
; i
++) {
2594 tt_vlan_req
->vid
= tt_vlan
->vid
;
2595 tt_vlan_req
->crc
= tt_vlan
->crc
;
2602 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
2604 batadv_dbg(BATADV_DBG_TT
, bat_priv
, "Sending TT_REQUEST to %pM [%c]\n",
2605 dst_orig_node
->orig
, full_table
? 'F' : '.');
2607 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_REQUEST_TX
);
2608 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
2609 dst_orig_node
->orig
, BATADV_TVLV_TT
, 1,
2610 tvlv_tt_data
, size
);
2615 batadv_hardif_put(primary_if
);
2616 if (ret
&& tt_req_node
) {
2617 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2618 /* hlist_del_init() verifies tt_req_node still is in the list */
2619 hlist_del_init(&tt_req_node
->list
);
2620 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2623 kfree(tvlv_tt_data
);
2628 * batadv_send_other_tt_response - send reply to tt request concerning another
2629 * node's translation table
2630 * @bat_priv: the bat priv with all the soft interface information
2631 * @tt_data: tt data containing the tt request information
2632 * @req_src: mac address of tt request sender
2633 * @req_dst: mac address of tt request recipient
2635 * Return: true if tt request reply was sent, false otherwise.
2637 static bool batadv_send_other_tt_response(struct batadv_priv
*bat_priv
,
2638 struct batadv_tvlv_tt_data
*tt_data
,
2639 u8
*req_src
, u8
*req_dst
)
2641 struct batadv_orig_node
*req_dst_orig_node
;
2642 struct batadv_orig_node
*res_dst_orig_node
= NULL
;
2643 struct batadv_tvlv_tt_change
*tt_change
;
2644 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
2645 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
2646 bool ret
= false, full_table
;
2647 u8 orig_ttvn
, req_ttvn
;
2651 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2652 "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n",
2653 req_src
, tt_data
->ttvn
, req_dst
,
2654 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
2656 /* Let's get the orig node of the REAL destination */
2657 req_dst_orig_node
= batadv_orig_hash_find(bat_priv
, req_dst
);
2658 if (!req_dst_orig_node
)
2661 res_dst_orig_node
= batadv_orig_hash_find(bat_priv
, req_src
);
2662 if (!res_dst_orig_node
)
2665 orig_ttvn
= (u8
)atomic_read(&req_dst_orig_node
->last_ttvn
);
2666 req_ttvn
= tt_data
->ttvn
;
2668 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(tt_data
+ 1);
2669 /* this node doesn't have the requested data */
2670 if (orig_ttvn
!= req_ttvn
||
2671 !batadv_tt_global_check_crc(req_dst_orig_node
, tt_vlan
,
2672 ntohs(tt_data
->num_vlan
)))
2675 /* If the full table has been explicitly requested */
2676 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
||
2677 !req_dst_orig_node
->tt_buff
)
2682 /* TT fragmentation hasn't been implemented yet, so send as many
2683 * TT entries fit a single packet as possible only
2686 spin_lock_bh(&req_dst_orig_node
->tt_buff_lock
);
2687 tt_len
= req_dst_orig_node
->tt_buff_len
;
2689 tvlv_len
= batadv_tt_prepare_tvlv_global_data(req_dst_orig_node
,
2696 /* Copy the last orig_node's OGM buffer */
2697 memcpy(tt_change
, req_dst_orig_node
->tt_buff
,
2698 req_dst_orig_node
->tt_buff_len
);
2699 spin_unlock_bh(&req_dst_orig_node
->tt_buff_lock
);
2701 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
2702 * in the initial part
2705 tvlv_len
= batadv_tt_prepare_tvlv_global_data(req_dst_orig_node
,
2712 /* fill the rest of the tvlv with the real TT entries */
2713 batadv_tt_tvlv_generate(bat_priv
, bat_priv
->tt
.global_hash
,
2715 batadv_tt_global_valid
,
2719 /* Don't send the response, if larger than fragmented packet. */
2720 tt_len
= sizeof(struct batadv_unicast_tvlv_packet
) + tvlv_len
;
2721 if (tt_len
> atomic_read(&bat_priv
->packet_size_max
)) {
2722 net_ratelimited_function(batadv_info
, bat_priv
->soft_iface
,
2723 "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n",
2724 res_dst_orig_node
->orig
);
2728 tvlv_tt_data
->flags
= BATADV_TT_RESPONSE
;
2729 tvlv_tt_data
->ttvn
= req_ttvn
;
2732 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
2734 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2735 "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n",
2736 res_dst_orig_node
->orig
, req_dst_orig_node
->orig
,
2737 full_table
? 'F' : '.', req_ttvn
);
2739 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_TX
);
2741 batadv_tvlv_unicast_send(bat_priv
, req_dst_orig_node
->orig
,
2742 req_src
, BATADV_TVLV_TT
, 1, tvlv_tt_data
,
2749 spin_unlock_bh(&req_dst_orig_node
->tt_buff_lock
);
2752 if (res_dst_orig_node
)
2753 batadv_orig_node_put(res_dst_orig_node
);
2754 if (req_dst_orig_node
)
2755 batadv_orig_node_put(req_dst_orig_node
);
2756 kfree(tvlv_tt_data
);
2761 * batadv_send_my_tt_response - send reply to tt request concerning this node's
2763 * @bat_priv: the bat priv with all the soft interface information
2764 * @tt_data: tt data containing the tt request information
2765 * @req_src: mac address of tt request sender
2767 * Return: true if tt request reply was sent, false otherwise.
2769 static bool batadv_send_my_tt_response(struct batadv_priv
*bat_priv
,
2770 struct batadv_tvlv_tt_data
*tt_data
,
2773 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
2774 struct batadv_hard_iface
*primary_if
= NULL
;
2775 struct batadv_tvlv_tt_change
*tt_change
;
2776 struct batadv_orig_node
*orig_node
;
2777 u8 my_ttvn
, req_ttvn
;
2782 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2783 "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
2784 req_src
, tt_data
->ttvn
,
2785 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
2787 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
2789 my_ttvn
= (u8
)atomic_read(&bat_priv
->tt
.vn
);
2790 req_ttvn
= tt_data
->ttvn
;
2792 orig_node
= batadv_orig_hash_find(bat_priv
, req_src
);
2796 primary_if
= batadv_primary_if_get_selected(bat_priv
);
2800 /* If the full table has been explicitly requested or the gap
2801 * is too big send the whole local translation table
2803 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
|| my_ttvn
!= req_ttvn
||
2804 !bat_priv
->tt
.last_changeset
)
2809 /* TT fragmentation hasn't been implemented yet, so send as many
2810 * TT entries fit a single packet as possible only
2813 spin_lock_bh(&bat_priv
->tt
.last_changeset_lock
);
2815 tt_len
= bat_priv
->tt
.last_changeset_len
;
2816 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
,
2823 /* Copy the last orig_node's OGM buffer */
2824 memcpy(tt_change
, bat_priv
->tt
.last_changeset
,
2825 bat_priv
->tt
.last_changeset_len
);
2826 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
2828 req_ttvn
= (u8
)atomic_read(&bat_priv
->tt
.vn
);
2830 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
2831 * in the initial part
2834 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
,
2841 /* fill the rest of the tvlv with the real TT entries */
2842 batadv_tt_tvlv_generate(bat_priv
, bat_priv
->tt
.local_hash
,
2844 batadv_tt_local_valid
, NULL
);
2847 tvlv_tt_data
->flags
= BATADV_TT_RESPONSE
;
2848 tvlv_tt_data
->ttvn
= req_ttvn
;
2851 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
2853 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2854 "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n",
2855 orig_node
->orig
, full_table
? 'F' : '.', req_ttvn
);
2857 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_TX
);
2859 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
2860 req_src
, BATADV_TVLV_TT
, 1, tvlv_tt_data
,
2866 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
2868 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
2870 batadv_orig_node_put(orig_node
);
2872 batadv_hardif_put(primary_if
);
2873 kfree(tvlv_tt_data
);
2874 /* The packet was for this host, so it doesn't need to be re-routed */
2879 * batadv_send_tt_response - send reply to tt request
2880 * @bat_priv: the bat priv with all the soft interface information
2881 * @tt_data: tt data containing the tt request information
2882 * @req_src: mac address of tt request sender
2883 * @req_dst: mac address of tt request recipient
2885 * Return: true if tt request reply was sent, false otherwise.
2887 static bool batadv_send_tt_response(struct batadv_priv
*bat_priv
,
2888 struct batadv_tvlv_tt_data
*tt_data
,
2889 u8
*req_src
, u8
*req_dst
)
2891 if (batadv_is_my_mac(bat_priv
, req_dst
))
2892 return batadv_send_my_tt_response(bat_priv
, tt_data
, req_src
);
2893 return batadv_send_other_tt_response(bat_priv
, tt_data
, req_src
,
2897 static void _batadv_tt_update_changes(struct batadv_priv
*bat_priv
,
2898 struct batadv_orig_node
*orig_node
,
2899 struct batadv_tvlv_tt_change
*tt_change
,
2900 u16 tt_num_changes
, u8 ttvn
)
2905 for (i
= 0; i
< tt_num_changes
; i
++) {
2906 if ((tt_change
+ i
)->flags
& BATADV_TT_CLIENT_DEL
) {
2907 roams
= (tt_change
+ i
)->flags
& BATADV_TT_CLIENT_ROAM
;
2908 batadv_tt_global_del(bat_priv
, orig_node
,
2909 (tt_change
+ i
)->addr
,
2910 ntohs((tt_change
+ i
)->vid
),
2911 "tt removed by changes",
2914 if (!batadv_tt_global_add(bat_priv
, orig_node
,
2915 (tt_change
+ i
)->addr
,
2916 ntohs((tt_change
+ i
)->vid
),
2917 (tt_change
+ i
)->flags
, ttvn
))
2918 /* In case of problem while storing a
2919 * global_entry, we stop the updating
2920 * procedure without committing the
2921 * ttvn change. This will avoid to send
2922 * corrupted data on tt_request
2927 set_bit(BATADV_ORIG_CAPA_HAS_TT
, &orig_node
->capa_initialized
);
2930 static void batadv_tt_fill_gtable(struct batadv_priv
*bat_priv
,
2931 struct batadv_tvlv_tt_change
*tt_change
,
2932 u8 ttvn
, u8
*resp_src
,
2935 struct batadv_orig_node
*orig_node
;
2937 orig_node
= batadv_orig_hash_find(bat_priv
, resp_src
);
2941 /* Purge the old table first.. */
2942 batadv_tt_global_del_orig(bat_priv
, orig_node
, -1,
2943 "Received full table");
2945 _batadv_tt_update_changes(bat_priv
, orig_node
, tt_change
, num_entries
,
2948 spin_lock_bh(&orig_node
->tt_buff_lock
);
2949 kfree(orig_node
->tt_buff
);
2950 orig_node
->tt_buff_len
= 0;
2951 orig_node
->tt_buff
= NULL
;
2952 spin_unlock_bh(&orig_node
->tt_buff_lock
);
2954 atomic_set(&orig_node
->last_ttvn
, ttvn
);
2958 batadv_orig_node_put(orig_node
);
2961 static void batadv_tt_update_changes(struct batadv_priv
*bat_priv
,
2962 struct batadv_orig_node
*orig_node
,
2963 u16 tt_num_changes
, u8 ttvn
,
2964 struct batadv_tvlv_tt_change
*tt_change
)
2966 _batadv_tt_update_changes(bat_priv
, orig_node
, tt_change
,
2967 tt_num_changes
, ttvn
);
2969 batadv_tt_save_orig_buffer(bat_priv
, orig_node
, tt_change
,
2970 batadv_tt_len(tt_num_changes
));
2971 atomic_set(&orig_node
->last_ttvn
, ttvn
);
2975 * batadv_is_my_client - check if a client is served by the local node
2976 * @bat_priv: the bat priv with all the soft interface information
2977 * @addr: the mac address of the client to check
2978 * @vid: VLAN identifier
2980 * Return: true if the client is served by this node, false otherwise.
2982 bool batadv_is_my_client(struct batadv_priv
*bat_priv
, const u8
*addr
,
2985 struct batadv_tt_local_entry
*tt_local_entry
;
2988 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
2989 if (!tt_local_entry
)
2991 /* Check if the client has been logically deleted (but is kept for
2992 * consistency purpose)
2994 if ((tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
) ||
2995 (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
))
3000 batadv_tt_local_entry_put(tt_local_entry
);
3005 * batadv_handle_tt_response - process incoming tt reply
3006 * @bat_priv: the bat priv with all the soft interface information
3007 * @tt_data: tt data containing the tt request information
3008 * @resp_src: mac address of tt reply sender
3009 * @num_entries: number of tt change entries appended to the tt data
3011 static void batadv_handle_tt_response(struct batadv_priv
*bat_priv
,
3012 struct batadv_tvlv_tt_data
*tt_data
,
3013 u8
*resp_src
, u16 num_entries
)
3015 struct batadv_tt_req_node
*node
;
3016 struct hlist_node
*safe
;
3017 struct batadv_orig_node
*orig_node
= NULL
;
3018 struct batadv_tvlv_tt_change
*tt_change
;
3019 u8
*tvlv_ptr
= (u8
*)tt_data
;
3022 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3023 "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
3024 resp_src
, tt_data
->ttvn
, num_entries
,
3025 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
3027 orig_node
= batadv_orig_hash_find(bat_priv
, resp_src
);
3031 spin_lock_bh(&orig_node
->tt_lock
);
3033 change_offset
= sizeof(struct batadv_tvlv_tt_vlan_data
);
3034 change_offset
*= ntohs(tt_data
->num_vlan
);
3035 change_offset
+= sizeof(*tt_data
);
3036 tvlv_ptr
+= change_offset
;
3038 tt_change
= (struct batadv_tvlv_tt_change
*)tvlv_ptr
;
3039 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
) {
3040 batadv_tt_fill_gtable(bat_priv
, tt_change
, tt_data
->ttvn
,
3041 resp_src
, num_entries
);
3043 batadv_tt_update_changes(bat_priv
, orig_node
, num_entries
,
3044 tt_data
->ttvn
, tt_change
);
3047 /* Recalculate the CRC for this orig_node and store it */
3048 batadv_tt_global_update_crc(bat_priv
, orig_node
);
3050 spin_unlock_bh(&orig_node
->tt_lock
);
3052 /* Delete the tt_req_node from pending tt_requests list */
3053 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
3054 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
3055 if (!batadv_compare_eth(node
->addr
, resp_src
))
3057 hlist_del_init(&node
->list
);
3061 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
3064 batadv_orig_node_put(orig_node
);
3067 static void batadv_tt_roam_list_free(struct batadv_priv
*bat_priv
)
3069 struct batadv_tt_roam_node
*node
, *safe
;
3071 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3073 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.roam_list
, list
) {
3074 list_del(&node
->list
);
3078 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3081 static void batadv_tt_roam_purge(struct batadv_priv
*bat_priv
)
3083 struct batadv_tt_roam_node
*node
, *safe
;
3085 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3086 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.roam_list
, list
) {
3087 if (!batadv_has_timed_out(node
->first_time
,
3088 BATADV_ROAMING_MAX_TIME
))
3091 list_del(&node
->list
);
3094 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3098 * batadv_tt_check_roam_count - check if a client has roamed too frequently
3099 * @bat_priv: the bat priv with all the soft interface information
3100 * @client: mac address of the roaming client
3102 * This function checks whether the client already reached the
3103 * maximum number of possible roaming phases. In this case the ROAMING_ADV
3106 * Return: true if the ROAMING_ADV can be sent, false otherwise
3108 static bool batadv_tt_check_roam_count(struct batadv_priv
*bat_priv
, u8
*client
)
3110 struct batadv_tt_roam_node
*tt_roam_node
;
3113 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3114 /* The new tt_req will be issued only if I'm not waiting for a
3115 * reply from the same orig_node yet
3117 list_for_each_entry(tt_roam_node
, &bat_priv
->tt
.roam_list
, list
) {
3118 if (!batadv_compare_eth(tt_roam_node
->addr
, client
))
3121 if (batadv_has_timed_out(tt_roam_node
->first_time
,
3122 BATADV_ROAMING_MAX_TIME
))
3125 if (!batadv_atomic_dec_not_zero(&tt_roam_node
->counter
))
3126 /* Sorry, you roamed too many times! */
3133 tt_roam_node
= kmalloc(sizeof(*tt_roam_node
), GFP_ATOMIC
);
3137 tt_roam_node
->first_time
= jiffies
;
3138 atomic_set(&tt_roam_node
->counter
,
3139 BATADV_ROAMING_MAX_COUNT
- 1);
3140 ether_addr_copy(tt_roam_node
->addr
, client
);
3142 list_add(&tt_roam_node
->list
, &bat_priv
->tt
.roam_list
);
3147 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3152 * batadv_send_roam_adv - send a roaming advertisement message
3153 * @bat_priv: the bat priv with all the soft interface information
3154 * @client: mac address of the roaming client
3155 * @vid: VLAN identifier
3156 * @orig_node: message destination
3158 * Send a ROAMING_ADV message to the node which was previously serving this
3159 * client. This is done to inform the node that from now on all traffic destined
3160 * for this particular roamed client has to be forwarded to the sender of the
3163 static void batadv_send_roam_adv(struct batadv_priv
*bat_priv
, u8
*client
,
3165 struct batadv_orig_node
*orig_node
)
3167 struct batadv_hard_iface
*primary_if
;
3168 struct batadv_tvlv_roam_adv tvlv_roam
;
3170 primary_if
= batadv_primary_if_get_selected(bat_priv
);
3174 /* before going on we have to check whether the client has
3175 * already roamed to us too many times
3177 if (!batadv_tt_check_roam_count(bat_priv
, client
))
3180 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3181 "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n",
3182 orig_node
->orig
, client
, BATADV_PRINT_VID(vid
));
3184 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_ROAM_ADV_TX
);
3186 memcpy(tvlv_roam
.client
, client
, sizeof(tvlv_roam
.client
));
3187 tvlv_roam
.vid
= htons(vid
);
3189 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
3190 orig_node
->orig
, BATADV_TVLV_ROAM
, 1,
3191 &tvlv_roam
, sizeof(tvlv_roam
));
3195 batadv_hardif_put(primary_if
);
3198 static void batadv_tt_purge(struct work_struct
*work
)
3200 struct delayed_work
*delayed_work
;
3201 struct batadv_priv_tt
*priv_tt
;
3202 struct batadv_priv
*bat_priv
;
3204 delayed_work
= to_delayed_work(work
);
3205 priv_tt
= container_of(delayed_work
, struct batadv_priv_tt
, work
);
3206 bat_priv
= container_of(priv_tt
, struct batadv_priv
, tt
);
3208 batadv_tt_local_purge(bat_priv
, BATADV_TT_LOCAL_TIMEOUT
);
3209 batadv_tt_global_purge(bat_priv
);
3210 batadv_tt_req_purge(bat_priv
);
3211 batadv_tt_roam_purge(bat_priv
);
3213 queue_delayed_work(batadv_event_workqueue
, &bat_priv
->tt
.work
,
3214 msecs_to_jiffies(BATADV_TT_WORK_PERIOD
));
3217 void batadv_tt_free(struct batadv_priv
*bat_priv
)
3219 batadv_tvlv_container_unregister(bat_priv
, BATADV_TVLV_TT
, 1);
3220 batadv_tvlv_handler_unregister(bat_priv
, BATADV_TVLV_TT
, 1);
3222 cancel_delayed_work_sync(&bat_priv
->tt
.work
);
3224 batadv_tt_local_table_free(bat_priv
);
3225 batadv_tt_global_table_free(bat_priv
);
3226 batadv_tt_req_list_free(bat_priv
);
3227 batadv_tt_changes_list_free(bat_priv
);
3228 batadv_tt_roam_list_free(bat_priv
);
3230 kfree(bat_priv
->tt
.last_changeset
);
3234 * batadv_tt_local_set_flags - set or unset the specified flags on the local
3235 * table and possibly count them in the TT size
3236 * @bat_priv: the bat priv with all the soft interface information
3237 * @flags: the flag to switch
3238 * @enable: whether to set or unset the flag
3239 * @count: whether to increase the TT size by the number of changed entries
3241 static void batadv_tt_local_set_flags(struct batadv_priv
*bat_priv
, u16 flags
,
3242 bool enable
, bool count
)
3244 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
3245 struct batadv_tt_common_entry
*tt_common_entry
;
3246 u16 changed_num
= 0;
3247 struct hlist_head
*head
;
3253 for (i
= 0; i
< hash
->size
; i
++) {
3254 head
= &hash
->table
[i
];
3257 hlist_for_each_entry_rcu(tt_common_entry
,
3260 if ((tt_common_entry
->flags
& flags
) == flags
)
3262 tt_common_entry
->flags
|= flags
;
3264 if (!(tt_common_entry
->flags
& flags
))
3266 tt_common_entry
->flags
&= ~flags
;
3273 batadv_tt_local_size_inc(bat_priv
,
3274 tt_common_entry
->vid
);
3280 /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */
3281 static void batadv_tt_local_purge_pending_clients(struct batadv_priv
*bat_priv
)
3283 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
3284 struct batadv_tt_common_entry
*tt_common
;
3285 struct batadv_tt_local_entry
*tt_local
;
3286 struct hlist_node
*node_tmp
;
3287 struct hlist_head
*head
;
3288 spinlock_t
*list_lock
; /* protects write access to the hash lists */
3294 for (i
= 0; i
< hash
->size
; i
++) {
3295 head
= &hash
->table
[i
];
3296 list_lock
= &hash
->list_locks
[i
];
3298 spin_lock_bh(list_lock
);
3299 hlist_for_each_entry_safe(tt_common
, node_tmp
, head
,
3301 if (!(tt_common
->flags
& BATADV_TT_CLIENT_PENDING
))
3304 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3305 "Deleting local tt entry (%pM, vid: %d): pending\n",
3307 BATADV_PRINT_VID(tt_common
->vid
));
3309 batadv_tt_local_size_dec(bat_priv
, tt_common
->vid
);
3310 hlist_del_rcu(&tt_common
->hash_entry
);
3311 tt_local
= container_of(tt_common
,
3312 struct batadv_tt_local_entry
,
3315 batadv_tt_local_entry_put(tt_local
);
3317 spin_unlock_bh(list_lock
);
3322 * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes
3323 * which have been queued in the time since the last commit
3324 * @bat_priv: the bat priv with all the soft interface information
3326 * Caller must hold tt->commit_lock.
3328 static void batadv_tt_local_commit_changes_nolock(struct batadv_priv
*bat_priv
)
3330 lockdep_assert_held(&bat_priv
->tt
.commit_lock
);
3332 /* Update multicast addresses in local translation table */
3333 batadv_mcast_mla_update(bat_priv
);
3335 if (atomic_read(&bat_priv
->tt
.local_changes
) < 1) {
3336 if (!batadv_atomic_dec_not_zero(&bat_priv
->tt
.ogm_append_cnt
))
3337 batadv_tt_tvlv_container_update(bat_priv
);
3341 batadv_tt_local_set_flags(bat_priv
, BATADV_TT_CLIENT_NEW
, false, true);
3343 batadv_tt_local_purge_pending_clients(bat_priv
);
3344 batadv_tt_local_update_crc(bat_priv
);
3346 /* Increment the TTVN only once per OGM interval */
3347 atomic_inc(&bat_priv
->tt
.vn
);
3348 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3349 "Local changes committed, updating to ttvn %u\n",
3350 (u8
)atomic_read(&bat_priv
->tt
.vn
));
3352 /* reset the sending counter */
3353 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, BATADV_TT_OGM_APPEND_MAX
);
3354 batadv_tt_tvlv_container_update(bat_priv
);
3358 * batadv_tt_local_commit_changes - commit all pending local tt changes which
3359 * have been queued in the time since the last commit
3360 * @bat_priv: the bat priv with all the soft interface information
3362 void batadv_tt_local_commit_changes(struct batadv_priv
*bat_priv
)
3364 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
3365 batadv_tt_local_commit_changes_nolock(bat_priv
);
3366 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
3369 bool batadv_is_ap_isolated(struct batadv_priv
*bat_priv
, u8
*src
, u8
*dst
,
3372 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
3373 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
3374 struct batadv_softif_vlan
*vlan
;
3377 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
3381 if (!atomic_read(&vlan
->ap_isolation
))
3384 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, dst
, vid
);
3385 if (!tt_local_entry
)
3388 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, src
, vid
);
3389 if (!tt_global_entry
)
3392 if (!_batadv_is_ap_isolated(tt_local_entry
, tt_global_entry
))
3398 batadv_softif_vlan_put(vlan
);
3399 if (tt_global_entry
)
3400 batadv_tt_global_entry_put(tt_global_entry
);
3402 batadv_tt_local_entry_put(tt_local_entry
);
3407 * batadv_tt_update_orig - update global translation table with new tt
3408 * information received via ogms
3409 * @bat_priv: the bat priv with all the soft interface information
3410 * @orig_node: the orig_node of the ogm
3411 * @tt_buff: pointer to the first tvlv VLAN entry
3412 * @tt_num_vlan: number of tvlv VLAN entries
3413 * @tt_change: pointer to the first entry in the TT buffer
3414 * @tt_num_changes: number of tt changes inside the tt buffer
3415 * @ttvn: translation table version number of this changeset
3417 static void batadv_tt_update_orig(struct batadv_priv
*bat_priv
,
3418 struct batadv_orig_node
*orig_node
,
3419 const void *tt_buff
, u16 tt_num_vlan
,
3420 struct batadv_tvlv_tt_change
*tt_change
,
3421 u16 tt_num_changes
, u8 ttvn
)
3423 u8 orig_ttvn
= (u8
)atomic_read(&orig_node
->last_ttvn
);
3424 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
3425 bool full_table
= true;
3428 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)tt_buff
;
3429 has_tt_init
= test_bit(BATADV_ORIG_CAPA_HAS_TT
,
3430 &orig_node
->capa_initialized
);
3432 /* orig table not initialised AND first diff is in the OGM OR the ttvn
3433 * increased by one -> we can apply the attached changes
3435 if ((!has_tt_init
&& ttvn
== 1) || ttvn
- orig_ttvn
== 1) {
3436 /* the OGM could not contain the changes due to their size or
3437 * because they have already been sent BATADV_TT_OGM_APPEND_MAX
3439 * In this case send a tt request
3441 if (!tt_num_changes
) {
3446 spin_lock_bh(&orig_node
->tt_lock
);
3448 batadv_tt_update_changes(bat_priv
, orig_node
, tt_num_changes
,
3451 /* Even if we received the precomputed crc with the OGM, we
3452 * prefer to recompute it to spot any possible inconsistency
3453 * in the global table
3455 batadv_tt_global_update_crc(bat_priv
, orig_node
);
3457 spin_unlock_bh(&orig_node
->tt_lock
);
3459 /* The ttvn alone is not enough to guarantee consistency
3460 * because a single value could represent different states
3461 * (due to the wrap around). Thus a node has to check whether
3462 * the resulting table (after applying the changes) is still
3463 * consistent or not. E.g. a node could disconnect while its
3464 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
3465 * checking the CRC value is mandatory to detect the
3468 if (!batadv_tt_global_check_crc(orig_node
, tt_vlan
,
3472 /* if we missed more than one change or our tables are not
3473 * in sync anymore -> request fresh tt data
3475 if (!has_tt_init
|| ttvn
!= orig_ttvn
||
3476 !batadv_tt_global_check_crc(orig_node
, tt_vlan
,
3479 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3480 "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n",
3481 orig_node
->orig
, ttvn
, orig_ttvn
,
3483 batadv_send_tt_request(bat_priv
, orig_node
, ttvn
,
3484 tt_vlan
, tt_num_vlan
,
3492 * batadv_tt_global_client_is_roaming - check if a client is marked as roaming
3493 * @bat_priv: the bat priv with all the soft interface information
3494 * @addr: the mac address of the client to check
3495 * @vid: VLAN identifier
3497 * Return: true if we know that the client has moved from its old originator
3498 * to another one. This entry is still kept for consistency purposes and will be
3499 * deleted later by a DEL or because of timeout
3501 bool batadv_tt_global_client_is_roaming(struct batadv_priv
*bat_priv
,
3502 u8
*addr
, unsigned short vid
)
3504 struct batadv_tt_global_entry
*tt_global_entry
;
3507 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
3508 if (!tt_global_entry
)
3511 ret
= tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
;
3512 batadv_tt_global_entry_put(tt_global_entry
);
3518 * batadv_tt_local_client_is_roaming - tells whether the client is roaming
3519 * @bat_priv: the bat priv with all the soft interface information
3520 * @addr: the mac address of the local client to query
3521 * @vid: VLAN identifier
3523 * Return: true if the local client is known to be roaming (it is not served by
3524 * this node anymore) or not. If yes, the client is still present in the table
3525 * to keep the latter consistent with the node TTVN
3527 bool batadv_tt_local_client_is_roaming(struct batadv_priv
*bat_priv
,
3528 u8
*addr
, unsigned short vid
)
3530 struct batadv_tt_local_entry
*tt_local_entry
;
3533 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
3534 if (!tt_local_entry
)
3537 ret
= tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
;
3538 batadv_tt_local_entry_put(tt_local_entry
);
3543 bool batadv_tt_add_temporary_global_entry(struct batadv_priv
*bat_priv
,
3544 struct batadv_orig_node
*orig_node
,
3545 const unsigned char *addr
,
3550 if (!batadv_tt_global_add(bat_priv
, orig_node
, addr
, vid
,
3551 BATADV_TT_CLIENT_TEMP
,
3552 atomic_read(&orig_node
->last_ttvn
)))
3555 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3556 "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n",
3557 addr
, BATADV_PRINT_VID(vid
), orig_node
->orig
);
3564 * batadv_tt_local_resize_to_mtu - resize the local translation table fit the
3565 * maximum packet size that can be transported through the mesh
3566 * @soft_iface: netdev struct of the mesh interface
3568 * Remove entries older than 'timeout' and half timeout if more entries need
3571 void batadv_tt_local_resize_to_mtu(struct net_device
*soft_iface
)
3573 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
3574 int packet_size_max
= atomic_read(&bat_priv
->packet_size_max
);
3575 int table_size
, timeout
= BATADV_TT_LOCAL_TIMEOUT
/ 2;
3576 bool reduced
= false;
3578 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
3581 table_size
= batadv_tt_local_table_transmit_size(bat_priv
);
3582 if (packet_size_max
>= table_size
)
3585 batadv_tt_local_purge(bat_priv
, timeout
);
3586 batadv_tt_local_purge_pending_clients(bat_priv
);
3590 net_ratelimited_function(batadv_info
, soft_iface
,
3591 "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n",
3595 /* commit these changes immediately, to avoid synchronization problem
3599 batadv_tt_local_commit_changes_nolock(bat_priv
);
3601 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
3605 * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container
3606 * @bat_priv: the bat priv with all the soft interface information
3607 * @orig: the orig_node of the ogm
3608 * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
3609 * @tvlv_value: tvlv buffer containing the gateway data
3610 * @tvlv_value_len: tvlv buffer length
3612 static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv
*bat_priv
,
3613 struct batadv_orig_node
*orig
,
3614 u8 flags
, void *tvlv_value
,
3617 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
3618 struct batadv_tvlv_tt_change
*tt_change
;
3619 struct batadv_tvlv_tt_data
*tt_data
;
3620 u16 num_entries
, num_vlan
;
3622 if (tvlv_value_len
< sizeof(*tt_data
))
3625 tt_data
= (struct batadv_tvlv_tt_data
*)tvlv_value
;
3626 tvlv_value_len
-= sizeof(*tt_data
);
3628 num_vlan
= ntohs(tt_data
->num_vlan
);
3630 if (tvlv_value_len
< sizeof(*tt_vlan
) * num_vlan
)
3633 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(tt_data
+ 1);
3634 tt_change
= (struct batadv_tvlv_tt_change
*)(tt_vlan
+ num_vlan
);
3635 tvlv_value_len
-= sizeof(*tt_vlan
) * num_vlan
;
3637 num_entries
= batadv_tt_entries(tvlv_value_len
);
3639 batadv_tt_update_orig(bat_priv
, orig
, tt_vlan
, num_vlan
, tt_change
,
3640 num_entries
, tt_data
->ttvn
);
3644 * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv
3646 * @bat_priv: the bat priv with all the soft interface information
3647 * @src: mac address of tt tvlv sender
3648 * @dst: mac address of tt tvlv recipient
3649 * @tvlv_value: tvlv buffer containing the tt data
3650 * @tvlv_value_len: tvlv buffer length
3652 * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS
3655 static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv
*bat_priv
,
3660 struct batadv_tvlv_tt_data
*tt_data
;
3661 u16 tt_vlan_len
, tt_num_entries
;
3665 if (tvlv_value_len
< sizeof(*tt_data
))
3666 return NET_RX_SUCCESS
;
3668 tt_data
= (struct batadv_tvlv_tt_data
*)tvlv_value
;
3669 tvlv_value_len
-= sizeof(*tt_data
);
3671 tt_vlan_len
= sizeof(struct batadv_tvlv_tt_vlan_data
);
3672 tt_vlan_len
*= ntohs(tt_data
->num_vlan
);
3674 if (tvlv_value_len
< tt_vlan_len
)
3675 return NET_RX_SUCCESS
;
3677 tvlv_value_len
-= tt_vlan_len
;
3678 tt_num_entries
= batadv_tt_entries(tvlv_value_len
);
3680 switch (tt_data
->flags
& BATADV_TT_DATA_TYPE_MASK
) {
3681 case BATADV_TT_REQUEST
:
3682 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_REQUEST_RX
);
3684 /* If this node cannot provide a TT response the tt_request is
3687 ret
= batadv_send_tt_response(bat_priv
, tt_data
, src
, dst
);
3689 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
)
3694 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3695 "Routing TT_REQUEST to %pM [%c]\n",
3697 /* tvlv API will re-route the packet */
3701 case BATADV_TT_RESPONSE
:
3702 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_RX
);
3704 if (batadv_is_my_mac(bat_priv
, dst
)) {
3705 batadv_handle_tt_response(bat_priv
, tt_data
,
3706 src
, tt_num_entries
);
3707 return NET_RX_SUCCESS
;
3710 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
)
3715 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3716 "Routing TT_RESPONSE to %pM [%c]\n", dst
, tt_flag
);
3718 /* tvlv API will re-route the packet */
3722 return NET_RX_SUCCESS
;
3726 * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container
3727 * @bat_priv: the bat priv with all the soft interface information
3728 * @src: mac address of tt tvlv sender
3729 * @dst: mac address of tt tvlv recipient
3730 * @tvlv_value: tvlv buffer containing the tt data
3731 * @tvlv_value_len: tvlv buffer length
3733 * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS
3736 static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv
*bat_priv
,
3741 struct batadv_tvlv_roam_adv
*roaming_adv
;
3742 struct batadv_orig_node
*orig_node
= NULL
;
3744 /* If this node is not the intended recipient of the
3745 * roaming advertisement the packet is forwarded
3746 * (the tvlv API will re-route the packet).
3748 if (!batadv_is_my_mac(bat_priv
, dst
))
3751 if (tvlv_value_len
< sizeof(*roaming_adv
))
3754 orig_node
= batadv_orig_hash_find(bat_priv
, src
);
3758 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_ROAM_ADV_RX
);
3759 roaming_adv
= (struct batadv_tvlv_roam_adv
*)tvlv_value
;
3761 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3762 "Received ROAMING_ADV from %pM (client %pM)\n",
3763 src
, roaming_adv
->client
);
3765 batadv_tt_global_add(bat_priv
, orig_node
, roaming_adv
->client
,
3766 ntohs(roaming_adv
->vid
), BATADV_TT_CLIENT_ROAM
,
3767 atomic_read(&orig_node
->last_ttvn
) + 1);
3771 batadv_orig_node_put(orig_node
);
3772 return NET_RX_SUCCESS
;
3776 * batadv_tt_init - initialise the translation table internals
3777 * @bat_priv: the bat priv with all the soft interface information
3779 * Return: 0 on success or negative error number in case of failure.
3781 int batadv_tt_init(struct batadv_priv
*bat_priv
)
3785 /* synchronized flags must be remote */
3786 BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK
& BATADV_TT_REMOTE_MASK
));
3788 ret
= batadv_tt_local_init(bat_priv
);
3792 ret
= batadv_tt_global_init(bat_priv
);
3796 batadv_tvlv_handler_register(bat_priv
, batadv_tt_tvlv_ogm_handler_v1
,
3797 batadv_tt_tvlv_unicast_handler_v1
,
3798 BATADV_TVLV_TT
, 1, BATADV_NO_FLAGS
);
3800 batadv_tvlv_handler_register(bat_priv
, NULL
,
3801 batadv_roam_tvlv_unicast_handler_v1
,
3802 BATADV_TVLV_ROAM
, 1, BATADV_NO_FLAGS
);
3804 INIT_DELAYED_WORK(&bat_priv
->tt
.work
, batadv_tt_purge
);
3805 queue_delayed_work(batadv_event_workqueue
, &bat_priv
->tt
.work
,
3806 msecs_to_jiffies(BATADV_TT_WORK_PERIOD
));
3812 * batadv_tt_global_is_isolated - check if a client is marked as isolated
3813 * @bat_priv: the bat priv with all the soft interface information
3814 * @addr: the mac address of the client
3815 * @vid: the identifier of the VLAN where this client is connected
3817 * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false
3820 bool batadv_tt_global_is_isolated(struct batadv_priv
*bat_priv
,
3821 const u8
*addr
, unsigned short vid
)
3823 struct batadv_tt_global_entry
*tt
;
3826 tt
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
3830 ret
= tt
->common
.flags
& BATADV_TT_CLIENT_ISOLA
;
3832 batadv_tt_global_entry_put(tt
);