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/cache.h>
26 #include <linux/compiler.h>
27 #include <linux/crc32c.h>
28 #include <linux/errno.h>
29 #include <linux/etherdevice.h>
31 #include <linux/if_ether.h>
32 #include <linux/init.h>
33 #include <linux/jhash.h>
34 #include <linux/jiffies.h>
35 #include <linux/kernel.h>
36 #include <linux/kref.h>
37 #include <linux/list.h>
38 #include <linux/lockdep.h>
39 #include <linux/netdevice.h>
40 #include <linux/netlink.h>
41 #include <linux/rculist.h>
42 #include <linux/rcupdate.h>
43 #include <linux/seq_file.h>
44 #include <linux/skbuff.h>
45 #include <linux/slab.h>
46 #include <linux/spinlock.h>
47 #include <linux/stddef.h>
48 #include <linux/string.h>
49 #include <linux/workqueue.h>
50 #include <net/genetlink.h>
51 #include <net/netlink.h>
53 #include <uapi/linux/batman_adv.h>
55 #include "bridge_loop_avoidance.h"
56 #include "hard-interface.h"
59 #include "multicast.h"
61 #include "originator.h"
63 #include "soft-interface.h"
66 static struct kmem_cache
*batadv_tl_cache __read_mostly
;
67 static struct kmem_cache
*batadv_tg_cache __read_mostly
;
68 static struct kmem_cache
*batadv_tt_orig_cache __read_mostly
;
69 static struct kmem_cache
*batadv_tt_change_cache __read_mostly
;
70 static struct kmem_cache
*batadv_tt_req_cache __read_mostly
;
71 static struct kmem_cache
*batadv_tt_roam_cache __read_mostly
;
74 static struct lock_class_key batadv_tt_local_hash_lock_class_key
;
75 static struct lock_class_key batadv_tt_global_hash_lock_class_key
;
77 static void batadv_send_roam_adv(struct batadv_priv
*bat_priv
, u8
*client
,
79 struct batadv_orig_node
*orig_node
);
80 static void batadv_tt_purge(struct work_struct
*work
);
82 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry
*tt_global_entry
);
83 static void batadv_tt_global_del(struct batadv_priv
*bat_priv
,
84 struct batadv_orig_node
*orig_node
,
85 const unsigned char *addr
,
86 unsigned short vid
, const char *message
,
90 * batadv_compare_tt - check if two TT entries are the same
91 * @node: the list element pointer of the first TT entry
92 * @data2: pointer to the tt_common_entry of the second TT entry
94 * Compare the MAC address and the VLAN ID of the two TT entries and check if
95 * they are the same TT client.
96 * Return: true if the two TT clients are the same, false otherwise
98 static bool batadv_compare_tt(const struct hlist_node
*node
, const void *data2
)
100 const void *data1
= container_of(node
, struct batadv_tt_common_entry
,
102 const struct batadv_tt_common_entry
*tt1
= data1
;
103 const struct batadv_tt_common_entry
*tt2
= data2
;
105 return (tt1
->vid
== tt2
->vid
) && batadv_compare_eth(data1
, data2
);
109 * batadv_choose_tt - return the index of the tt entry in the hash table
110 * @data: pointer to the tt_common_entry object to map
111 * @size: the size of the hash table
113 * Return: the hash index where the object represented by 'data' should be
116 static inline u32
batadv_choose_tt(const void *data
, u32 size
)
118 struct batadv_tt_common_entry
*tt
;
121 tt
= (struct batadv_tt_common_entry
*)data
;
122 hash
= jhash(&tt
->addr
, ETH_ALEN
, hash
);
123 hash
= jhash(&tt
->vid
, sizeof(tt
->vid
), hash
);
129 * batadv_tt_hash_find - look for a client in the given hash table
130 * @hash: the hash table to search
131 * @addr: the mac address of the client to look for
132 * @vid: VLAN identifier
134 * Return: a pointer to the tt_common struct belonging to the searched client if
135 * found, NULL otherwise.
137 static struct batadv_tt_common_entry
*
138 batadv_tt_hash_find(struct batadv_hashtable
*hash
, const u8
*addr
,
141 struct hlist_head
*head
;
142 struct batadv_tt_common_entry to_search
, *tt
, *tt_tmp
= NULL
;
148 ether_addr_copy(to_search
.addr
, addr
);
151 index
= batadv_choose_tt(&to_search
, hash
->size
);
152 head
= &hash
->table
[index
];
155 hlist_for_each_entry_rcu(tt
, head
, hash_entry
) {
156 if (!batadv_compare_eth(tt
, addr
))
162 if (!kref_get_unless_zero(&tt
->refcount
))
174 * batadv_tt_local_hash_find - search the local table for a given client
175 * @bat_priv: the bat priv with all the soft interface information
176 * @addr: the mac address of the client to look for
177 * @vid: VLAN identifier
179 * Return: a pointer to the corresponding tt_local_entry struct if the client is
180 * found, NULL otherwise.
182 static struct batadv_tt_local_entry
*
183 batadv_tt_local_hash_find(struct batadv_priv
*bat_priv
, const u8
*addr
,
186 struct batadv_tt_common_entry
*tt_common_entry
;
187 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
189 tt_common_entry
= batadv_tt_hash_find(bat_priv
->tt
.local_hash
, addr
,
192 tt_local_entry
= container_of(tt_common_entry
,
193 struct batadv_tt_local_entry
,
195 return tt_local_entry
;
199 * batadv_tt_global_hash_find - search the global table for a given client
200 * @bat_priv: the bat priv with all the soft interface information
201 * @addr: the mac address of the client to look for
202 * @vid: VLAN identifier
204 * Return: a pointer to the corresponding tt_global_entry struct if the client
205 * is found, NULL otherwise.
207 static struct batadv_tt_global_entry
*
208 batadv_tt_global_hash_find(struct batadv_priv
*bat_priv
, const u8
*addr
,
211 struct batadv_tt_common_entry
*tt_common_entry
;
212 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
214 tt_common_entry
= batadv_tt_hash_find(bat_priv
->tt
.global_hash
, addr
,
217 tt_global_entry
= container_of(tt_common_entry
,
218 struct batadv_tt_global_entry
,
220 return tt_global_entry
;
224 * batadv_tt_local_entry_free_rcu - free the tt_local_entry
225 * @rcu: rcu pointer of the tt_local_entry
227 static void batadv_tt_local_entry_free_rcu(struct rcu_head
*rcu
)
229 struct batadv_tt_local_entry
*tt_local_entry
;
231 tt_local_entry
= container_of(rcu
, struct batadv_tt_local_entry
,
234 kmem_cache_free(batadv_tl_cache
, tt_local_entry
);
238 * batadv_tt_local_entry_release - release tt_local_entry from lists and queue
239 * for free after rcu grace period
240 * @ref: kref pointer of the nc_node
242 static void batadv_tt_local_entry_release(struct kref
*ref
)
244 struct batadv_tt_local_entry
*tt_local_entry
;
246 tt_local_entry
= container_of(ref
, struct batadv_tt_local_entry
,
249 batadv_softif_vlan_put(tt_local_entry
->vlan
);
251 call_rcu(&tt_local_entry
->common
.rcu
, batadv_tt_local_entry_free_rcu
);
255 * batadv_tt_local_entry_put - decrement the tt_local_entry refcounter and
256 * possibly release it
257 * @tt_local_entry: tt_local_entry to be free'd
260 batadv_tt_local_entry_put(struct batadv_tt_local_entry
*tt_local_entry
)
262 kref_put(&tt_local_entry
->common
.refcount
,
263 batadv_tt_local_entry_release
);
267 * batadv_tt_global_entry_free_rcu - free the tt_global_entry
268 * @rcu: rcu pointer of the tt_global_entry
270 static void batadv_tt_global_entry_free_rcu(struct rcu_head
*rcu
)
272 struct batadv_tt_global_entry
*tt_global_entry
;
274 tt_global_entry
= container_of(rcu
, struct batadv_tt_global_entry
,
277 kmem_cache_free(batadv_tg_cache
, tt_global_entry
);
281 * batadv_tt_global_entry_release - release tt_global_entry from lists and queue
282 * for free after rcu grace period
283 * @ref: kref pointer of the nc_node
285 static void batadv_tt_global_entry_release(struct kref
*ref
)
287 struct batadv_tt_global_entry
*tt_global_entry
;
289 tt_global_entry
= container_of(ref
, struct batadv_tt_global_entry
,
292 batadv_tt_global_del_orig_list(tt_global_entry
);
294 call_rcu(&tt_global_entry
->common
.rcu
, batadv_tt_global_entry_free_rcu
);
298 * batadv_tt_global_entry_put - decrement the tt_global_entry refcounter and
299 * possibly release it
300 * @tt_global_entry: tt_global_entry to be free'd
303 batadv_tt_global_entry_put(struct batadv_tt_global_entry
*tt_global_entry
)
305 kref_put(&tt_global_entry
->common
.refcount
,
306 batadv_tt_global_entry_release
);
310 * batadv_tt_global_hash_count - count the number of orig entries
311 * @bat_priv: the bat priv with all the soft interface information
312 * @addr: the mac address of the client to count entries for
313 * @vid: VLAN identifier
315 * Return: the number of originators advertising the given address/data
316 * (excluding ourself).
318 int batadv_tt_global_hash_count(struct batadv_priv
*bat_priv
,
319 const u8
*addr
, unsigned short vid
)
321 struct batadv_tt_global_entry
*tt_global_entry
;
324 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
325 if (!tt_global_entry
)
328 count
= atomic_read(&tt_global_entry
->orig_list_count
);
329 batadv_tt_global_entry_put(tt_global_entry
);
335 * batadv_tt_local_size_mod - change the size by v of the local table identified
337 * @bat_priv: the bat priv with all the soft interface information
338 * @vid: the VLAN identifier of the sub-table to change
339 * @v: the amount to sum to the local table size
341 static void batadv_tt_local_size_mod(struct batadv_priv
*bat_priv
,
342 unsigned short vid
, int v
)
344 struct batadv_softif_vlan
*vlan
;
346 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
350 atomic_add(v
, &vlan
->tt
.num_entries
);
352 batadv_softif_vlan_put(vlan
);
356 * batadv_tt_local_size_inc - increase by one the local table size for the given
358 * @bat_priv: the bat priv with all the soft interface information
359 * @vid: the VLAN identifier
361 static void batadv_tt_local_size_inc(struct batadv_priv
*bat_priv
,
364 batadv_tt_local_size_mod(bat_priv
, vid
, 1);
368 * batadv_tt_local_size_dec - decrease by one the local table size for the given
370 * @bat_priv: the bat priv with all the soft interface information
371 * @vid: the VLAN identifier
373 static void batadv_tt_local_size_dec(struct batadv_priv
*bat_priv
,
376 batadv_tt_local_size_mod(bat_priv
, vid
, -1);
380 * batadv_tt_global_size_mod - change the size by v of the global table
381 * for orig_node identified by vid
382 * @orig_node: the originator for which the table has to be modified
383 * @vid: the VLAN identifier
384 * @v: the amount to sum to the global table size
386 static void batadv_tt_global_size_mod(struct batadv_orig_node
*orig_node
,
387 unsigned short vid
, int v
)
389 struct batadv_orig_node_vlan
*vlan
;
391 vlan
= batadv_orig_node_vlan_new(orig_node
, vid
);
395 if (atomic_add_return(v
, &vlan
->tt
.num_entries
) == 0) {
396 spin_lock_bh(&orig_node
->vlan_list_lock
);
397 if (!hlist_unhashed(&vlan
->list
)) {
398 hlist_del_init_rcu(&vlan
->list
);
399 batadv_orig_node_vlan_put(vlan
);
401 spin_unlock_bh(&orig_node
->vlan_list_lock
);
404 batadv_orig_node_vlan_put(vlan
);
408 * batadv_tt_global_size_inc - increase by one the global table size for the
410 * @orig_node: the originator which global table size has to be decreased
411 * @vid: the vlan identifier
413 static void batadv_tt_global_size_inc(struct batadv_orig_node
*orig_node
,
416 batadv_tt_global_size_mod(orig_node
, vid
, 1);
420 * batadv_tt_global_size_dec - decrease by one the global table size for the
422 * @orig_node: the originator which global table size has to be decreased
423 * @vid: the vlan identifier
425 static void batadv_tt_global_size_dec(struct batadv_orig_node
*orig_node
,
428 batadv_tt_global_size_mod(orig_node
, vid
, -1);
432 * batadv_tt_orig_list_entry_free_rcu - free the orig_entry
433 * @rcu: rcu pointer of the orig_entry
435 static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head
*rcu
)
437 struct batadv_tt_orig_list_entry
*orig_entry
;
439 orig_entry
= container_of(rcu
, struct batadv_tt_orig_list_entry
, rcu
);
441 kmem_cache_free(batadv_tt_orig_cache
, orig_entry
);
445 * batadv_tt_orig_list_entry_release - release tt orig entry from lists and
446 * queue for free after rcu grace period
447 * @ref: kref pointer of the tt orig entry
449 static void batadv_tt_orig_list_entry_release(struct kref
*ref
)
451 struct batadv_tt_orig_list_entry
*orig_entry
;
453 orig_entry
= container_of(ref
, struct batadv_tt_orig_list_entry
,
456 batadv_orig_node_put(orig_entry
->orig_node
);
457 call_rcu(&orig_entry
->rcu
, batadv_tt_orig_list_entry_free_rcu
);
461 * batadv_tt_orig_list_entry_put - decrement the tt orig entry refcounter and
462 * possibly release it
463 * @orig_entry: tt orig entry to be free'd
466 batadv_tt_orig_list_entry_put(struct batadv_tt_orig_list_entry
*orig_entry
)
468 kref_put(&orig_entry
->refcount
, batadv_tt_orig_list_entry_release
);
472 * batadv_tt_local_event - store a local TT event (ADD/DEL)
473 * @bat_priv: the bat priv with all the soft interface information
474 * @tt_local_entry: the TT entry involved in the event
475 * @event_flags: flags to store in the event structure
477 static void batadv_tt_local_event(struct batadv_priv
*bat_priv
,
478 struct batadv_tt_local_entry
*tt_local_entry
,
481 struct batadv_tt_change_node
*tt_change_node
, *entry
, *safe
;
482 struct batadv_tt_common_entry
*common
= &tt_local_entry
->common
;
483 u8 flags
= common
->flags
| event_flags
;
484 bool event_removed
= false;
485 bool del_op_requested
, del_op_entry
;
487 tt_change_node
= kmem_cache_alloc(batadv_tt_change_cache
, GFP_ATOMIC
);
491 tt_change_node
->change
.flags
= flags
;
492 memset(tt_change_node
->change
.reserved
, 0,
493 sizeof(tt_change_node
->change
.reserved
));
494 ether_addr_copy(tt_change_node
->change
.addr
, common
->addr
);
495 tt_change_node
->change
.vid
= htons(common
->vid
);
497 del_op_requested
= flags
& BATADV_TT_CLIENT_DEL
;
499 /* check for ADD+DEL or DEL+ADD events */
500 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
501 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
503 if (!batadv_compare_eth(entry
->change
.addr
, common
->addr
))
506 /* DEL+ADD in the same orig interval have no effect and can be
507 * removed to avoid silly behaviour on the receiver side. The
508 * other way around (ADD+DEL) can happen in case of roaming of
509 * a client still in the NEW state. Roaming of NEW clients is
510 * now possible due to automatically recognition of "temporary"
513 del_op_entry
= entry
->change
.flags
& BATADV_TT_CLIENT_DEL
;
514 if (!del_op_requested
&& del_op_entry
)
516 if (del_op_requested
&& !del_op_entry
)
519 /* this is a second add in the same originator interval. It
520 * means that flags have been changed: update them!
522 if (!del_op_requested
&& !del_op_entry
)
523 entry
->change
.flags
= flags
;
527 list_del(&entry
->list
);
528 kmem_cache_free(batadv_tt_change_cache
, entry
);
529 kmem_cache_free(batadv_tt_change_cache
, tt_change_node
);
530 event_removed
= true;
534 /* track the change in the OGMinterval list */
535 list_add_tail(&tt_change_node
->list
, &bat_priv
->tt
.changes_list
);
538 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
541 atomic_dec(&bat_priv
->tt
.local_changes
);
543 atomic_inc(&bat_priv
->tt
.local_changes
);
547 * batadv_tt_len - compute length in bytes of given number of tt changes
548 * @changes_num: number of tt changes
550 * Return: computed length in bytes.
552 static int batadv_tt_len(int changes_num
)
554 return changes_num
* sizeof(struct batadv_tvlv_tt_change
);
558 * batadv_tt_entries - compute the number of entries fitting in tt_len bytes
559 * @tt_len: available space
561 * Return: the number of entries.
563 static u16
batadv_tt_entries(u16 tt_len
)
565 return tt_len
/ batadv_tt_len(1);
569 * batadv_tt_local_table_transmit_size - calculates the local translation table
570 * size when transmitted over the air
571 * @bat_priv: the bat priv with all the soft interface information
573 * Return: local translation table size in bytes.
575 static int batadv_tt_local_table_transmit_size(struct batadv_priv
*bat_priv
)
578 u16 tt_local_entries
= 0;
579 struct batadv_softif_vlan
*vlan
;
583 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
585 tt_local_entries
+= atomic_read(&vlan
->tt
.num_entries
);
589 /* header size of tvlv encapsulated tt response payload */
590 hdr_size
= sizeof(struct batadv_unicast_tvlv_packet
);
591 hdr_size
+= sizeof(struct batadv_tvlv_hdr
);
592 hdr_size
+= sizeof(struct batadv_tvlv_tt_data
);
593 hdr_size
+= num_vlan
* sizeof(struct batadv_tvlv_tt_vlan_data
);
595 return hdr_size
+ batadv_tt_len(tt_local_entries
);
598 static int batadv_tt_local_init(struct batadv_priv
*bat_priv
)
600 if (bat_priv
->tt
.local_hash
)
603 bat_priv
->tt
.local_hash
= batadv_hash_new(1024);
605 if (!bat_priv
->tt
.local_hash
)
608 batadv_hash_set_lock_class(bat_priv
->tt
.local_hash
,
609 &batadv_tt_local_hash_lock_class_key
);
614 static void batadv_tt_global_free(struct batadv_priv
*bat_priv
,
615 struct batadv_tt_global_entry
*tt_global
,
618 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
619 "Deleting global tt entry %pM (vid: %d): %s\n",
620 tt_global
->common
.addr
,
621 BATADV_PRINT_VID(tt_global
->common
.vid
), message
);
623 batadv_hash_remove(bat_priv
->tt
.global_hash
, batadv_compare_tt
,
624 batadv_choose_tt
, &tt_global
->common
);
625 batadv_tt_global_entry_put(tt_global
);
629 * batadv_tt_local_add - add a new client to the local table or update an
631 * @soft_iface: netdev struct of the mesh interface
632 * @addr: the mac address of the client to add
633 * @vid: VLAN identifier
634 * @ifindex: index of the interface where the client is connected to (useful to
635 * identify wireless clients)
636 * @mark: the value contained in the skb->mark field of the received packet (if
639 * Return: true if the client was successfully added, false otherwise.
641 bool batadv_tt_local_add(struct net_device
*soft_iface
, const u8
*addr
,
642 unsigned short vid
, int ifindex
, u32 mark
)
644 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
645 struct batadv_tt_local_entry
*tt_local
;
646 struct batadv_tt_global_entry
*tt_global
= NULL
;
647 struct net
*net
= dev_net(soft_iface
);
648 struct batadv_softif_vlan
*vlan
;
649 struct net_device
*in_dev
= NULL
;
650 struct hlist_head
*head
;
651 struct batadv_tt_orig_list_entry
*orig_entry
;
652 int hash_added
, table_size
, packet_size_max
;
654 bool roamed_back
= false;
658 if (ifindex
!= BATADV_NULL_IFINDEX
)
659 in_dev
= dev_get_by_index(net
, ifindex
);
661 tt_local
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
663 if (!is_multicast_ether_addr(addr
))
664 tt_global
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
667 tt_local
->last_seen
= jiffies
;
668 if (tt_local
->common
.flags
& BATADV_TT_CLIENT_PENDING
) {
669 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
670 "Re-adding pending client %pM (vid: %d)\n",
671 addr
, BATADV_PRINT_VID(vid
));
672 /* whatever the reason why the PENDING flag was set,
673 * this is a client which was enqueued to be removed in
674 * this orig_interval. Since it popped up again, the
675 * flag can be reset like it was never enqueued
677 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_PENDING
;
681 if (tt_local
->common
.flags
& BATADV_TT_CLIENT_ROAM
) {
682 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
683 "Roaming client %pM (vid: %d) came back to its original location\n",
684 addr
, BATADV_PRINT_VID(vid
));
685 /* the ROAM flag is set because this client roamed away
686 * and the node got a roaming_advertisement message. Now
687 * that the client popped up again at its original
688 * location such flag can be unset
690 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_ROAM
;
696 /* Ignore the client if we cannot send it in a full table response. */
697 table_size
= batadv_tt_local_table_transmit_size(bat_priv
);
698 table_size
+= batadv_tt_len(1);
699 packet_size_max
= atomic_read(&bat_priv
->packet_size_max
);
700 if (table_size
> packet_size_max
) {
701 net_ratelimited_function(batadv_info
, soft_iface
,
702 "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n",
703 table_size
, packet_size_max
, addr
);
707 tt_local
= kmem_cache_alloc(batadv_tl_cache
, GFP_ATOMIC
);
711 /* increase the refcounter of the related vlan */
712 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
714 net_ratelimited_function(batadv_info
, soft_iface
,
715 "adding TT local entry %pM to non-existent VLAN %d\n",
716 addr
, BATADV_PRINT_VID(vid
));
717 kmem_cache_free(batadv_tl_cache
, tt_local
);
722 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
723 "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n",
724 addr
, BATADV_PRINT_VID(vid
),
725 (u8
)atomic_read(&bat_priv
->tt
.vn
));
727 ether_addr_copy(tt_local
->common
.addr
, addr
);
728 /* The local entry has to be marked as NEW to avoid to send it in
729 * a full table response going out before the next ttvn increment
730 * (consistency check)
732 tt_local
->common
.flags
= BATADV_TT_CLIENT_NEW
;
733 tt_local
->common
.vid
= vid
;
734 if (batadv_is_wifi_netdev(in_dev
))
735 tt_local
->common
.flags
|= BATADV_TT_CLIENT_WIFI
;
736 kref_init(&tt_local
->common
.refcount
);
737 tt_local
->last_seen
= jiffies
;
738 tt_local
->common
.added_at
= tt_local
->last_seen
;
739 tt_local
->vlan
= vlan
;
741 /* the batman interface mac and multicast addresses should never be
744 if (batadv_compare_eth(addr
, soft_iface
->dev_addr
) ||
745 is_multicast_ether_addr(addr
))
746 tt_local
->common
.flags
|= BATADV_TT_CLIENT_NOPURGE
;
748 kref_get(&tt_local
->common
.refcount
);
749 hash_added
= batadv_hash_add(bat_priv
->tt
.local_hash
, batadv_compare_tt
,
750 batadv_choose_tt
, &tt_local
->common
,
751 &tt_local
->common
.hash_entry
);
753 if (unlikely(hash_added
!= 0)) {
754 /* remove the reference for the hash */
755 batadv_tt_local_entry_put(tt_local
);
760 batadv_tt_local_event(bat_priv
, tt_local
, BATADV_NO_FLAGS
);
763 /* Check whether it is a roaming, but don't do anything if the roaming
764 * process has already been handled
766 if (tt_global
&& !(tt_global
->common
.flags
& BATADV_TT_CLIENT_ROAM
)) {
767 /* These node are probably going to update their tt table */
768 head
= &tt_global
->orig_list
;
770 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
771 batadv_send_roam_adv(bat_priv
, tt_global
->common
.addr
,
772 tt_global
->common
.vid
,
773 orig_entry
->orig_node
);
777 batadv_tt_global_free(bat_priv
, tt_global
,
781 /* The global entry has to be marked as ROAMING and
782 * has to be kept for consistency purpose
784 tt_global
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
785 tt_global
->roam_at
= jiffies
;
789 /* store the current remote flags before altering them. This helps
790 * understanding is flags are changing or not
792 remote_flags
= tt_local
->common
.flags
& BATADV_TT_REMOTE_MASK
;
794 if (batadv_is_wifi_netdev(in_dev
))
795 tt_local
->common
.flags
|= BATADV_TT_CLIENT_WIFI
;
797 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_WIFI
;
799 /* check the mark in the skb: if it's equal to the configured
800 * isolation_mark, it means the packet is coming from an isolated
803 match_mark
= (mark
& bat_priv
->isolation_mark_mask
);
804 if (bat_priv
->isolation_mark_mask
&&
805 match_mark
== bat_priv
->isolation_mark
)
806 tt_local
->common
.flags
|= BATADV_TT_CLIENT_ISOLA
;
808 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_ISOLA
;
810 /* if any "dynamic" flag has been modified, resend an ADD event for this
811 * entry so that all the nodes can get the new flags
813 if (remote_flags
^ (tt_local
->common
.flags
& BATADV_TT_REMOTE_MASK
))
814 batadv_tt_local_event(bat_priv
, tt_local
, BATADV_NO_FLAGS
);
821 batadv_tt_local_entry_put(tt_local
);
823 batadv_tt_global_entry_put(tt_global
);
828 * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send
829 * within a TT Response directed to another node
830 * @orig_node: originator for which the TT data has to be prepared
831 * @tt_data: uninitialised pointer to the address of the TVLV buffer
832 * @tt_change: uninitialised pointer to the address of the area where the TT
833 * changed can be stored
834 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
835 * function reserves the amount of space needed to send the entire global TT
836 * table. In case of success the value is updated with the real amount of
838 * Allocate the needed amount of memory for the entire TT TVLV and write its
839 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
840 * objects, one per active VLAN served by the originator node.
842 * Return: the size of the allocated buffer or 0 in case of failure.
845 batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node
*orig_node
,
846 struct batadv_tvlv_tt_data
**tt_data
,
847 struct batadv_tvlv_tt_change
**tt_change
,
854 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
855 struct batadv_orig_node_vlan
*vlan
;
859 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
) {
861 num_entries
+= atomic_read(&vlan
->tt
.num_entries
);
864 change_offset
= sizeof(**tt_data
);
865 change_offset
+= num_vlan
* sizeof(*tt_vlan
);
867 /* if tt_len is negative, allocate the space needed by the full table */
869 *tt_len
= batadv_tt_len(num_entries
);
872 tvlv_len
+= change_offset
;
874 *tt_data
= kmalloc(tvlv_len
, GFP_ATOMIC
);
880 (*tt_data
)->flags
= BATADV_NO_FLAGS
;
881 (*tt_data
)->ttvn
= atomic_read(&orig_node
->last_ttvn
);
882 (*tt_data
)->num_vlan
= htons(num_vlan
);
884 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(*tt_data
+ 1);
885 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
) {
886 tt_vlan
->vid
= htons(vlan
->vid
);
887 tt_vlan
->crc
= htonl(vlan
->tt
.crc
);
892 tt_change_ptr
= (u8
*)*tt_data
+ change_offset
;
893 *tt_change
= (struct batadv_tvlv_tt_change
*)tt_change_ptr
;
901 * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this
903 * @bat_priv: the bat priv with all the soft interface information
904 * @tt_data: uninitialised pointer to the address of the TVLV buffer
905 * @tt_change: uninitialised pointer to the address of the area where the TT
906 * changes can be stored
907 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
908 * function reserves the amount of space needed to send the entire local TT
909 * table. In case of success the value is updated with the real amount of
912 * Allocate the needed amount of memory for the entire TT TVLV and write its
913 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
914 * objects, one per active VLAN.
916 * Return: the size of the allocated buffer or 0 in case of failure.
919 batadv_tt_prepare_tvlv_local_data(struct batadv_priv
*bat_priv
,
920 struct batadv_tvlv_tt_data
**tt_data
,
921 struct batadv_tvlv_tt_change
**tt_change
,
924 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
925 struct batadv_softif_vlan
*vlan
;
933 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
935 num_entries
+= atomic_read(&vlan
->tt
.num_entries
);
938 change_offset
= sizeof(**tt_data
);
939 change_offset
+= num_vlan
* sizeof(*tt_vlan
);
941 /* if tt_len is negative, allocate the space needed by the full table */
943 *tt_len
= batadv_tt_len(num_entries
);
946 tvlv_len
+= change_offset
;
948 *tt_data
= kmalloc(tvlv_len
, GFP_ATOMIC
);
954 (*tt_data
)->flags
= BATADV_NO_FLAGS
;
955 (*tt_data
)->ttvn
= atomic_read(&bat_priv
->tt
.vn
);
956 (*tt_data
)->num_vlan
= htons(num_vlan
);
958 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(*tt_data
+ 1);
959 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
960 tt_vlan
->vid
= htons(vlan
->vid
);
961 tt_vlan
->crc
= htonl(vlan
->tt
.crc
);
966 tt_change_ptr
= (u8
*)*tt_data
+ change_offset
;
967 *tt_change
= (struct batadv_tvlv_tt_change
*)tt_change_ptr
;
975 * batadv_tt_tvlv_container_update - update the translation table tvlv container
976 * after local tt changes have been committed
977 * @bat_priv: the bat priv with all the soft interface information
979 static void batadv_tt_tvlv_container_update(struct batadv_priv
*bat_priv
)
981 struct batadv_tt_change_node
*entry
, *safe
;
982 struct batadv_tvlv_tt_data
*tt_data
;
983 struct batadv_tvlv_tt_change
*tt_change
;
984 int tt_diff_len
, tt_change_len
= 0;
985 int tt_diff_entries_num
= 0;
986 int tt_diff_entries_count
= 0;
989 tt_diff_entries_num
= atomic_read(&bat_priv
->tt
.local_changes
);
990 tt_diff_len
= batadv_tt_len(tt_diff_entries_num
);
992 /* if we have too many changes for one packet don't send any
993 * and wait for the tt table request which will be fragmented
995 if (tt_diff_len
> bat_priv
->soft_iface
->mtu
)
998 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
, &tt_data
,
999 &tt_change
, &tt_diff_len
);
1003 tt_data
->flags
= BATADV_TT_OGM_DIFF
;
1005 if (tt_diff_len
== 0)
1006 goto container_register
;
1008 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
1009 atomic_set(&bat_priv
->tt
.local_changes
, 0);
1011 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
1013 if (tt_diff_entries_count
< tt_diff_entries_num
) {
1014 memcpy(tt_change
+ tt_diff_entries_count
,
1016 sizeof(struct batadv_tvlv_tt_change
));
1017 tt_diff_entries_count
++;
1019 list_del(&entry
->list
);
1020 kmem_cache_free(batadv_tt_change_cache
, entry
);
1022 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
1024 /* Keep the buffer for possible tt_request */
1025 spin_lock_bh(&bat_priv
->tt
.last_changeset_lock
);
1026 kfree(bat_priv
->tt
.last_changeset
);
1027 bat_priv
->tt
.last_changeset_len
= 0;
1028 bat_priv
->tt
.last_changeset
= NULL
;
1029 tt_change_len
= batadv_tt_len(tt_diff_entries_count
);
1030 /* check whether this new OGM has no changes due to size problems */
1031 if (tt_diff_entries_count
> 0) {
1032 /* if kmalloc() fails we will reply with the full table
1033 * instead of providing the diff
1035 bat_priv
->tt
.last_changeset
= kzalloc(tt_diff_len
, GFP_ATOMIC
);
1036 if (bat_priv
->tt
.last_changeset
) {
1037 memcpy(bat_priv
->tt
.last_changeset
,
1038 tt_change
, tt_change_len
);
1039 bat_priv
->tt
.last_changeset_len
= tt_diff_len
;
1042 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
1045 batadv_tvlv_container_register(bat_priv
, BATADV_TVLV_TT
, 1, tt_data
,
1050 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1051 int batadv_tt_local_seq_print_text(struct seq_file
*seq
, void *offset
)
1053 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1054 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
1055 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
1056 struct batadv_tt_common_entry
*tt_common_entry
;
1057 struct batadv_tt_local_entry
*tt_local
;
1058 struct batadv_hard_iface
*primary_if
;
1059 struct hlist_head
*head
;
1062 int last_seen_msecs
;
1063 unsigned long last_seen_jiffies
;
1065 u16 np_flag
= BATADV_TT_CLIENT_NOPURGE
;
1067 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
1072 "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n",
1073 net_dev
->name
, (u8
)atomic_read(&bat_priv
->tt
.vn
));
1075 " Client VID Flags Last seen (CRC )\n");
1077 for (i
= 0; i
< hash
->size
; i
++) {
1078 head
= &hash
->table
[i
];
1081 hlist_for_each_entry_rcu(tt_common_entry
,
1083 tt_local
= container_of(tt_common_entry
,
1084 struct batadv_tt_local_entry
,
1086 last_seen_jiffies
= jiffies
- tt_local
->last_seen
;
1087 last_seen_msecs
= jiffies_to_msecs(last_seen_jiffies
);
1088 last_seen_secs
= last_seen_msecs
/ 1000;
1089 last_seen_msecs
= last_seen_msecs
% 1000;
1091 no_purge
= tt_common_entry
->flags
& np_flag
;
1093 " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n",
1094 tt_common_entry
->addr
,
1095 BATADV_PRINT_VID(tt_common_entry
->vid
),
1096 ((tt_common_entry
->flags
&
1097 BATADV_TT_CLIENT_ROAM
) ? 'R' : '.'),
1098 no_purge
? 'P' : '.',
1099 ((tt_common_entry
->flags
&
1100 BATADV_TT_CLIENT_NEW
) ? 'N' : '.'),
1101 ((tt_common_entry
->flags
&
1102 BATADV_TT_CLIENT_PENDING
) ? 'X' : '.'),
1103 ((tt_common_entry
->flags
&
1104 BATADV_TT_CLIENT_WIFI
) ? 'W' : '.'),
1105 ((tt_common_entry
->flags
&
1106 BATADV_TT_CLIENT_ISOLA
) ? 'I' : '.'),
1107 no_purge
? 0 : last_seen_secs
,
1108 no_purge
? 0 : last_seen_msecs
,
1109 tt_local
->vlan
->tt
.crc
);
1115 batadv_hardif_put(primary_if
);
1121 * batadv_tt_local_dump_entry - Dump one TT local entry into a message
1122 * @msg :Netlink message to dump into
1123 * @portid: Port making netlink request
1124 * @seq: Sequence number of netlink message
1125 * @bat_priv: The bat priv with all the soft interface information
1126 * @common: tt local & tt global common data
1128 * Return: Error code, or 0 on success
1131 batadv_tt_local_dump_entry(struct sk_buff
*msg
, u32 portid
, u32 seq
,
1132 struct batadv_priv
*bat_priv
,
1133 struct batadv_tt_common_entry
*common
)
1136 struct batadv_softif_vlan
*vlan
;
1137 struct batadv_tt_local_entry
*local
;
1138 unsigned int last_seen_msecs
;
1141 local
= container_of(common
, struct batadv_tt_local_entry
, common
);
1142 last_seen_msecs
= jiffies_to_msecs(jiffies
- local
->last_seen
);
1144 vlan
= batadv_softif_vlan_get(bat_priv
, common
->vid
);
1150 batadv_softif_vlan_put(vlan
);
1152 hdr
= genlmsg_put(msg
, portid
, seq
, &batadv_netlink_family
,
1154 BATADV_CMD_GET_TRANSTABLE_LOCAL
);
1158 if (nla_put(msg
, BATADV_ATTR_TT_ADDRESS
, ETH_ALEN
, common
->addr
) ||
1159 nla_put_u32(msg
, BATADV_ATTR_TT_CRC32
, crc
) ||
1160 nla_put_u16(msg
, BATADV_ATTR_TT_VID
, common
->vid
) ||
1161 nla_put_u32(msg
, BATADV_ATTR_TT_FLAGS
, common
->flags
))
1162 goto nla_put_failure
;
1164 if (!(common
->flags
& BATADV_TT_CLIENT_NOPURGE
) &&
1165 nla_put_u32(msg
, BATADV_ATTR_LAST_SEEN_MSECS
, last_seen_msecs
))
1166 goto nla_put_failure
;
1168 genlmsg_end(msg
, hdr
);
1172 genlmsg_cancel(msg
, hdr
);
1177 * batadv_tt_local_dump_bucket - Dump one TT local bucket into a message
1178 * @msg: Netlink message to dump into
1179 * @portid: Port making netlink request
1180 * @seq: Sequence number of netlink message
1181 * @bat_priv: The bat priv with all the soft interface information
1182 * @head: Pointer to the list containing the local tt entries
1183 * @idx_s: Number of entries to skip
1185 * Return: Error code, or 0 on success
1188 batadv_tt_local_dump_bucket(struct sk_buff
*msg
, u32 portid
, u32 seq
,
1189 struct batadv_priv
*bat_priv
,
1190 struct hlist_head
*head
, int *idx_s
)
1192 struct batadv_tt_common_entry
*common
;
1196 hlist_for_each_entry_rcu(common
, head
, hash_entry
) {
1200 if (batadv_tt_local_dump_entry(msg
, portid
, seq
, bat_priv
,
1214 * batadv_tt_local_dump - Dump TT local entries into a message
1215 * @msg: Netlink message to dump into
1216 * @cb: Parameters from query
1218 * Return: Error code, or 0 on success
1220 int batadv_tt_local_dump(struct sk_buff
*msg
, struct netlink_callback
*cb
)
1222 struct net
*net
= sock_net(cb
->skb
->sk
);
1223 struct net_device
*soft_iface
;
1224 struct batadv_priv
*bat_priv
;
1225 struct batadv_hard_iface
*primary_if
= NULL
;
1226 struct batadv_hashtable
*hash
;
1227 struct hlist_head
*head
;
1230 int bucket
= cb
->args
[0];
1231 int idx
= cb
->args
[1];
1232 int portid
= NETLINK_CB(cb
->skb
).portid
;
1234 ifindex
= batadv_netlink_get_ifindex(cb
->nlh
, BATADV_ATTR_MESH_IFINDEX
);
1238 soft_iface
= dev_get_by_index(net
, ifindex
);
1239 if (!soft_iface
|| !batadv_softif_is_valid(soft_iface
)) {
1244 bat_priv
= netdev_priv(soft_iface
);
1246 primary_if
= batadv_primary_if_get_selected(bat_priv
);
1247 if (!primary_if
|| primary_if
->if_status
!= BATADV_IF_ACTIVE
) {
1252 hash
= bat_priv
->tt
.local_hash
;
1254 while (bucket
< hash
->size
) {
1255 head
= &hash
->table
[bucket
];
1257 if (batadv_tt_local_dump_bucket(msg
, portid
, cb
->nlh
->nlmsg_seq
,
1258 bat_priv
, head
, &idx
))
1268 batadv_hardif_put(primary_if
);
1270 dev_put(soft_iface
);
1272 cb
->args
[0] = bucket
;
1279 batadv_tt_local_set_pending(struct batadv_priv
*bat_priv
,
1280 struct batadv_tt_local_entry
*tt_local_entry
,
1281 u16 flags
, const char *message
)
1283 batadv_tt_local_event(bat_priv
, tt_local_entry
, flags
);
1285 /* The local client has to be marked as "pending to be removed" but has
1286 * to be kept in the table in order to send it in a full table
1287 * response issued before the net ttvn increment (consistency check)
1289 tt_local_entry
->common
.flags
|= BATADV_TT_CLIENT_PENDING
;
1291 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1292 "Local tt entry (%pM, vid: %d) pending to be removed: %s\n",
1293 tt_local_entry
->common
.addr
,
1294 BATADV_PRINT_VID(tt_local_entry
->common
.vid
), message
);
1298 * batadv_tt_local_remove - logically remove an entry from the local table
1299 * @bat_priv: the bat priv with all the soft interface information
1300 * @addr: the MAC address of the client to remove
1301 * @vid: VLAN identifier
1302 * @message: message to append to the log on deletion
1303 * @roaming: true if the deletion is due to a roaming event
1305 * Return: the flags assigned to the local entry before being deleted
1307 u16
batadv_tt_local_remove(struct batadv_priv
*bat_priv
, const u8
*addr
,
1308 unsigned short vid
, const char *message
,
1311 struct batadv_tt_local_entry
*tt_local_entry
;
1312 u16 flags
, curr_flags
= BATADV_NO_FLAGS
;
1313 void *tt_entry_exists
;
1315 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
1316 if (!tt_local_entry
)
1319 curr_flags
= tt_local_entry
->common
.flags
;
1321 flags
= BATADV_TT_CLIENT_DEL
;
1322 /* if this global entry addition is due to a roaming, the node has to
1323 * mark the local entry as "roamed" in order to correctly reroute
1327 flags
|= BATADV_TT_CLIENT_ROAM
;
1328 /* mark the local client as ROAMed */
1329 tt_local_entry
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
1332 if (!(tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NEW
)) {
1333 batadv_tt_local_set_pending(bat_priv
, tt_local_entry
, flags
,
1337 /* if this client has been added right now, it is possible to
1338 * immediately purge it
1340 batadv_tt_local_event(bat_priv
, tt_local_entry
, BATADV_TT_CLIENT_DEL
);
1342 tt_entry_exists
= batadv_hash_remove(bat_priv
->tt
.local_hash
,
1345 &tt_local_entry
->common
);
1346 if (!tt_entry_exists
)
1349 /* extra call to free the local tt entry */
1350 batadv_tt_local_entry_put(tt_local_entry
);
1354 batadv_tt_local_entry_put(tt_local_entry
);
1360 * batadv_tt_local_purge_list - purge inactive tt local entries
1361 * @bat_priv: the bat priv with all the soft interface information
1362 * @head: pointer to the list containing the local tt entries
1363 * @timeout: parameter deciding whether a given tt local entry is considered
1366 static void batadv_tt_local_purge_list(struct batadv_priv
*bat_priv
,
1367 struct hlist_head
*head
,
1370 struct batadv_tt_local_entry
*tt_local_entry
;
1371 struct batadv_tt_common_entry
*tt_common_entry
;
1372 struct hlist_node
*node_tmp
;
1374 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
, head
,
1376 tt_local_entry
= container_of(tt_common_entry
,
1377 struct batadv_tt_local_entry
,
1379 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NOPURGE
)
1382 /* entry already marked for deletion */
1383 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
)
1386 if (!batadv_has_timed_out(tt_local_entry
->last_seen
, timeout
))
1389 batadv_tt_local_set_pending(bat_priv
, tt_local_entry
,
1390 BATADV_TT_CLIENT_DEL
, "timed out");
1395 * batadv_tt_local_purge - purge inactive tt local entries
1396 * @bat_priv: the bat priv with all the soft interface information
1397 * @timeout: parameter deciding whether a given tt local entry is considered
1400 static void batadv_tt_local_purge(struct batadv_priv
*bat_priv
,
1403 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
1404 struct hlist_head
*head
;
1405 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1408 for (i
= 0; i
< hash
->size
; i
++) {
1409 head
= &hash
->table
[i
];
1410 list_lock
= &hash
->list_locks
[i
];
1412 spin_lock_bh(list_lock
);
1413 batadv_tt_local_purge_list(bat_priv
, head
, timeout
);
1414 spin_unlock_bh(list_lock
);
1418 static void batadv_tt_local_table_free(struct batadv_priv
*bat_priv
)
1420 struct batadv_hashtable
*hash
;
1421 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1422 struct batadv_tt_common_entry
*tt_common_entry
;
1423 struct batadv_tt_local_entry
*tt_local
;
1424 struct hlist_node
*node_tmp
;
1425 struct hlist_head
*head
;
1428 if (!bat_priv
->tt
.local_hash
)
1431 hash
= bat_priv
->tt
.local_hash
;
1433 for (i
= 0; i
< hash
->size
; i
++) {
1434 head
= &hash
->table
[i
];
1435 list_lock
= &hash
->list_locks
[i
];
1437 spin_lock_bh(list_lock
);
1438 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
,
1440 hlist_del_rcu(&tt_common_entry
->hash_entry
);
1441 tt_local
= container_of(tt_common_entry
,
1442 struct batadv_tt_local_entry
,
1445 batadv_tt_local_entry_put(tt_local
);
1447 spin_unlock_bh(list_lock
);
1450 batadv_hash_destroy(hash
);
1452 bat_priv
->tt
.local_hash
= NULL
;
1455 static int batadv_tt_global_init(struct batadv_priv
*bat_priv
)
1457 if (bat_priv
->tt
.global_hash
)
1460 bat_priv
->tt
.global_hash
= batadv_hash_new(1024);
1462 if (!bat_priv
->tt
.global_hash
)
1465 batadv_hash_set_lock_class(bat_priv
->tt
.global_hash
,
1466 &batadv_tt_global_hash_lock_class_key
);
1471 static void batadv_tt_changes_list_free(struct batadv_priv
*bat_priv
)
1473 struct batadv_tt_change_node
*entry
, *safe
;
1475 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
1477 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
1479 list_del(&entry
->list
);
1480 kmem_cache_free(batadv_tt_change_cache
, entry
);
1483 atomic_set(&bat_priv
->tt
.local_changes
, 0);
1484 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
1488 * batadv_tt_global_orig_entry_find - find a TT orig_list_entry
1489 * @entry: the TT global entry where the orig_list_entry has to be
1491 * @orig_node: the originator for which the orig_list_entry has to be found
1493 * retrieve the orig_tt_list_entry belonging to orig_node from the
1494 * batadv_tt_global_entry list
1496 * Return: it with an increased refcounter, NULL if not found
1498 static struct batadv_tt_orig_list_entry
*
1499 batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry
*entry
,
1500 const struct batadv_orig_node
*orig_node
)
1502 struct batadv_tt_orig_list_entry
*tmp_orig_entry
, *orig_entry
= NULL
;
1503 const struct hlist_head
*head
;
1506 head
= &entry
->orig_list
;
1507 hlist_for_each_entry_rcu(tmp_orig_entry
, head
, list
) {
1508 if (tmp_orig_entry
->orig_node
!= orig_node
)
1510 if (!kref_get_unless_zero(&tmp_orig_entry
->refcount
))
1513 orig_entry
= tmp_orig_entry
;
1522 * batadv_tt_global_entry_has_orig - check if a TT global entry is also handled
1523 * by a given originator
1524 * @entry: the TT global entry to check
1525 * @orig_node: the originator to search in the list
1527 * find out if an orig_node is already in the list of a tt_global_entry.
1529 * Return: true if found, false otherwise
1532 batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry
*entry
,
1533 const struct batadv_orig_node
*orig_node
)
1535 struct batadv_tt_orig_list_entry
*orig_entry
;
1538 orig_entry
= batadv_tt_global_orig_entry_find(entry
, orig_node
);
1541 batadv_tt_orig_list_entry_put(orig_entry
);
1548 batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry
*tt_global
,
1549 struct batadv_orig_node
*orig_node
, int ttvn
)
1551 struct batadv_tt_orig_list_entry
*orig_entry
;
1553 orig_entry
= batadv_tt_global_orig_entry_find(tt_global
, orig_node
);
1555 /* refresh the ttvn: the current value could be a bogus one that
1556 * was added during a "temporary client detection"
1558 orig_entry
->ttvn
= ttvn
;
1562 orig_entry
= kmem_cache_zalloc(batadv_tt_orig_cache
, GFP_ATOMIC
);
1566 INIT_HLIST_NODE(&orig_entry
->list
);
1567 kref_get(&orig_node
->refcount
);
1568 batadv_tt_global_size_inc(orig_node
, tt_global
->common
.vid
);
1569 orig_entry
->orig_node
= orig_node
;
1570 orig_entry
->ttvn
= ttvn
;
1571 kref_init(&orig_entry
->refcount
);
1573 spin_lock_bh(&tt_global
->list_lock
);
1574 kref_get(&orig_entry
->refcount
);
1575 hlist_add_head_rcu(&orig_entry
->list
,
1576 &tt_global
->orig_list
);
1577 spin_unlock_bh(&tt_global
->list_lock
);
1578 atomic_inc(&tt_global
->orig_list_count
);
1582 batadv_tt_orig_list_entry_put(orig_entry
);
1586 * batadv_tt_global_add - add a new TT global entry or update an existing one
1587 * @bat_priv: the bat priv with all the soft interface information
1588 * @orig_node: the originator announcing the client
1589 * @tt_addr: the mac address of the non-mesh client
1590 * @vid: VLAN identifier
1591 * @flags: TT flags that have to be set for this non-mesh client
1592 * @ttvn: the tt version number ever announcing this non-mesh client
1594 * Add a new TT global entry for the given originator. If the entry already
1595 * exists add a new reference to the given originator (a global entry can have
1596 * references to multiple originators) and adjust the flags attribute to reflect
1597 * the function argument.
1598 * If a TT local entry exists for this non-mesh client remove it.
1600 * The caller must hold orig_node refcount.
1602 * Return: true if the new entry has been added, false otherwise
1604 static bool batadv_tt_global_add(struct batadv_priv
*bat_priv
,
1605 struct batadv_orig_node
*orig_node
,
1606 const unsigned char *tt_addr
,
1607 unsigned short vid
, u16 flags
, u8 ttvn
)
1609 struct batadv_tt_global_entry
*tt_global_entry
;
1610 struct batadv_tt_local_entry
*tt_local_entry
;
1613 struct batadv_tt_common_entry
*common
;
1616 /* ignore global entries from backbone nodes */
1617 if (batadv_bla_is_backbone_gw_orig(bat_priv
, orig_node
->orig
, vid
))
1620 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, tt_addr
, vid
);
1621 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, tt_addr
, vid
);
1623 /* if the node already has a local client for this entry, it has to wait
1624 * for a roaming advertisement instead of manually messing up the global
1627 if ((flags
& BATADV_TT_CLIENT_TEMP
) && tt_local_entry
&&
1628 !(tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NEW
))
1631 if (!tt_global_entry
) {
1632 tt_global_entry
= kmem_cache_zalloc(batadv_tg_cache
,
1634 if (!tt_global_entry
)
1637 common
= &tt_global_entry
->common
;
1638 ether_addr_copy(common
->addr
, tt_addr
);
1641 common
->flags
= flags
;
1642 tt_global_entry
->roam_at
= 0;
1643 /* node must store current time in case of roaming. This is
1644 * needed to purge this entry out on timeout (if nobody claims
1647 if (flags
& BATADV_TT_CLIENT_ROAM
)
1648 tt_global_entry
->roam_at
= jiffies
;
1649 kref_init(&common
->refcount
);
1650 common
->added_at
= jiffies
;
1652 INIT_HLIST_HEAD(&tt_global_entry
->orig_list
);
1653 atomic_set(&tt_global_entry
->orig_list_count
, 0);
1654 spin_lock_init(&tt_global_entry
->list_lock
);
1656 kref_get(&common
->refcount
);
1657 hash_added
= batadv_hash_add(bat_priv
->tt
.global_hash
,
1659 batadv_choose_tt
, common
,
1660 &common
->hash_entry
);
1662 if (unlikely(hash_added
!= 0)) {
1663 /* remove the reference for the hash */
1664 batadv_tt_global_entry_put(tt_global_entry
);
1668 common
= &tt_global_entry
->common
;
1669 /* If there is already a global entry, we can use this one for
1671 * But if we are trying to add a temporary client then here are
1672 * two options at this point:
1673 * 1) the global client is not a temporary client: the global
1674 * client has to be left as it is, temporary information
1675 * should never override any already known client state
1676 * 2) the global client is a temporary client: purge the
1677 * originator list and add the new one orig_entry
1679 if (flags
& BATADV_TT_CLIENT_TEMP
) {
1680 if (!(common
->flags
& BATADV_TT_CLIENT_TEMP
))
1682 if (batadv_tt_global_entry_has_orig(tt_global_entry
,
1685 batadv_tt_global_del_orig_list(tt_global_entry
);
1686 goto add_orig_entry
;
1689 /* if the client was temporary added before receiving the first
1690 * OGM announcing it, we have to clear the TEMP flag. Also,
1691 * remove the previous temporary orig node and re-add it
1692 * if required. If the orig entry changed, the new one which
1693 * is a non-temporary entry is preferred.
1695 if (common
->flags
& BATADV_TT_CLIENT_TEMP
) {
1696 batadv_tt_global_del_orig_list(tt_global_entry
);
1697 common
->flags
&= ~BATADV_TT_CLIENT_TEMP
;
1700 /* the change can carry possible "attribute" flags like the
1701 * TT_CLIENT_WIFI, therefore they have to be copied in the
1704 common
->flags
|= flags
;
1706 /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only
1707 * one originator left in the list and we previously received a
1708 * delete + roaming change for this originator.
1710 * We should first delete the old originator before adding the
1713 if (common
->flags
& BATADV_TT_CLIENT_ROAM
) {
1714 batadv_tt_global_del_orig_list(tt_global_entry
);
1715 common
->flags
&= ~BATADV_TT_CLIENT_ROAM
;
1716 tt_global_entry
->roam_at
= 0;
1720 /* add the new orig_entry (if needed) or update it */
1721 batadv_tt_global_orig_entry_add(tt_global_entry
, orig_node
, ttvn
);
1723 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1724 "Creating new global tt entry: %pM (vid: %d, via %pM)\n",
1725 common
->addr
, BATADV_PRINT_VID(common
->vid
),
1730 /* Do not remove multicast addresses from the local hash on
1733 if (is_multicast_ether_addr(tt_addr
))
1736 /* remove address from local hash if present */
1737 local_flags
= batadv_tt_local_remove(bat_priv
, tt_addr
, vid
,
1738 "global tt received",
1739 flags
& BATADV_TT_CLIENT_ROAM
);
1740 tt_global_entry
->common
.flags
|= local_flags
& BATADV_TT_CLIENT_WIFI
;
1742 if (!(flags
& BATADV_TT_CLIENT_ROAM
))
1743 /* this is a normal global add. Therefore the client is not in a
1744 * roaming state anymore.
1746 tt_global_entry
->common
.flags
&= ~BATADV_TT_CLIENT_ROAM
;
1749 if (tt_global_entry
)
1750 batadv_tt_global_entry_put(tt_global_entry
);
1752 batadv_tt_local_entry_put(tt_local_entry
);
1757 * batadv_transtable_best_orig - Get best originator list entry from tt entry
1758 * @bat_priv: the bat priv with all the soft interface information
1759 * @tt_global_entry: global translation table entry to be analyzed
1761 * This functon assumes the caller holds rcu_read_lock().
1762 * Return: best originator list entry or NULL on errors.
1764 static struct batadv_tt_orig_list_entry
*
1765 batadv_transtable_best_orig(struct batadv_priv
*bat_priv
,
1766 struct batadv_tt_global_entry
*tt_global_entry
)
1768 struct batadv_neigh_node
*router
, *best_router
= NULL
;
1769 struct batadv_algo_ops
*bao
= bat_priv
->algo_ops
;
1770 struct hlist_head
*head
;
1771 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
= NULL
;
1773 head
= &tt_global_entry
->orig_list
;
1774 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1775 router
= batadv_orig_router_get(orig_entry
->orig_node
,
1781 bao
->neigh
.cmp(router
, BATADV_IF_DEFAULT
, best_router
,
1782 BATADV_IF_DEFAULT
) <= 0) {
1783 batadv_neigh_node_put(router
);
1787 /* release the refcount for the "old" best */
1789 batadv_neigh_node_put(best_router
);
1791 best_entry
= orig_entry
;
1792 best_router
= router
;
1796 batadv_neigh_node_put(best_router
);
1801 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1803 * batadv_tt_global_print_entry - print all orig nodes who announce the address
1804 * for this global entry
1805 * @bat_priv: the bat priv with all the soft interface information
1806 * @tt_global_entry: global translation table entry to be printed
1807 * @seq: debugfs table seq_file struct
1809 * This functon assumes the caller holds rcu_read_lock().
1812 batadv_tt_global_print_entry(struct batadv_priv
*bat_priv
,
1813 struct batadv_tt_global_entry
*tt_global_entry
,
1814 struct seq_file
*seq
)
1816 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
;
1817 struct batadv_tt_common_entry
*tt_common_entry
;
1818 struct batadv_orig_node_vlan
*vlan
;
1819 struct hlist_head
*head
;
1823 tt_common_entry
= &tt_global_entry
->common
;
1824 flags
= tt_common_entry
->flags
;
1826 best_entry
= batadv_transtable_best_orig(bat_priv
, tt_global_entry
);
1828 vlan
= batadv_orig_node_vlan_get(best_entry
->orig_node
,
1829 tt_common_entry
->vid
);
1832 " * Cannot retrieve VLAN %d for originator %pM\n",
1833 BATADV_PRINT_VID(tt_common_entry
->vid
),
1834 best_entry
->orig_node
->orig
);
1838 last_ttvn
= atomic_read(&best_entry
->orig_node
->last_ttvn
);
1840 " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1841 '*', tt_global_entry
->common
.addr
,
1842 BATADV_PRINT_VID(tt_global_entry
->common
.vid
),
1843 best_entry
->ttvn
, best_entry
->orig_node
->orig
,
1844 last_ttvn
, vlan
->tt
.crc
,
1845 ((flags
& BATADV_TT_CLIENT_ROAM
) ? 'R' : '.'),
1846 ((flags
& BATADV_TT_CLIENT_WIFI
) ? 'W' : '.'),
1847 ((flags
& BATADV_TT_CLIENT_ISOLA
) ? 'I' : '.'),
1848 ((flags
& BATADV_TT_CLIENT_TEMP
) ? 'T' : '.'));
1850 batadv_orig_node_vlan_put(vlan
);
1854 head
= &tt_global_entry
->orig_list
;
1856 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1857 if (best_entry
== orig_entry
)
1860 vlan
= batadv_orig_node_vlan_get(orig_entry
->orig_node
,
1861 tt_common_entry
->vid
);
1864 " + Cannot retrieve VLAN %d for originator %pM\n",
1865 BATADV_PRINT_VID(tt_common_entry
->vid
),
1866 orig_entry
->orig_node
->orig
);
1870 last_ttvn
= atomic_read(&orig_entry
->orig_node
->last_ttvn
);
1872 " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1873 '+', tt_global_entry
->common
.addr
,
1874 BATADV_PRINT_VID(tt_global_entry
->common
.vid
),
1875 orig_entry
->ttvn
, orig_entry
->orig_node
->orig
,
1876 last_ttvn
, vlan
->tt
.crc
,
1877 ((flags
& BATADV_TT_CLIENT_ROAM
) ? 'R' : '.'),
1878 ((flags
& BATADV_TT_CLIENT_WIFI
) ? 'W' : '.'),
1879 ((flags
& BATADV_TT_CLIENT_ISOLA
) ? 'I' : '.'),
1880 ((flags
& BATADV_TT_CLIENT_TEMP
) ? 'T' : '.'));
1882 batadv_orig_node_vlan_put(vlan
);
1886 int batadv_tt_global_seq_print_text(struct seq_file
*seq
, void *offset
)
1888 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1889 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
1890 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
1891 struct batadv_tt_common_entry
*tt_common_entry
;
1892 struct batadv_tt_global_entry
*tt_global
;
1893 struct batadv_hard_iface
*primary_if
;
1894 struct hlist_head
*head
;
1897 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
1902 "Globally announced TT entries received via the mesh %s\n",
1905 " Client VID (TTVN) Originator (Curr TTVN) (CRC ) Flags\n");
1907 for (i
= 0; i
< hash
->size
; i
++) {
1908 head
= &hash
->table
[i
];
1911 hlist_for_each_entry_rcu(tt_common_entry
,
1913 tt_global
= container_of(tt_common_entry
,
1914 struct batadv_tt_global_entry
,
1916 batadv_tt_global_print_entry(bat_priv
, tt_global
, seq
);
1922 batadv_hardif_put(primary_if
);
1928 * batadv_tt_global_dump_subentry - Dump all TT local entries into a message
1929 * @msg: Netlink message to dump into
1930 * @portid: Port making netlink request
1931 * @seq: Sequence number of netlink message
1932 * @common: tt local & tt global common data
1933 * @orig: Originator node announcing a non-mesh client
1934 * @best: Is the best originator for the TT entry
1936 * Return: Error code, or 0 on success
1939 batadv_tt_global_dump_subentry(struct sk_buff
*msg
, u32 portid
, u32 seq
,
1940 struct batadv_tt_common_entry
*common
,
1941 struct batadv_tt_orig_list_entry
*orig
,
1945 struct batadv_orig_node_vlan
*vlan
;
1949 vlan
= batadv_orig_node_vlan_get(orig
->orig_node
,
1956 batadv_orig_node_vlan_put(vlan
);
1958 hdr
= genlmsg_put(msg
, portid
, seq
, &batadv_netlink_family
,
1960 BATADV_CMD_GET_TRANSTABLE_GLOBAL
);
1964 last_ttvn
= atomic_read(&orig
->orig_node
->last_ttvn
);
1966 if (nla_put(msg
, BATADV_ATTR_TT_ADDRESS
, ETH_ALEN
, common
->addr
) ||
1967 nla_put(msg
, BATADV_ATTR_ORIG_ADDRESS
, ETH_ALEN
,
1968 orig
->orig_node
->orig
) ||
1969 nla_put_u8(msg
, BATADV_ATTR_TT_TTVN
, orig
->ttvn
) ||
1970 nla_put_u8(msg
, BATADV_ATTR_TT_LAST_TTVN
, last_ttvn
) ||
1971 nla_put_u32(msg
, BATADV_ATTR_TT_CRC32
, crc
) ||
1972 nla_put_u16(msg
, BATADV_ATTR_TT_VID
, common
->vid
) ||
1973 nla_put_u32(msg
, BATADV_ATTR_TT_FLAGS
, common
->flags
))
1974 goto nla_put_failure
;
1976 if (best
&& nla_put_flag(msg
, BATADV_ATTR_FLAG_BEST
))
1977 goto nla_put_failure
;
1979 genlmsg_end(msg
, hdr
);
1983 genlmsg_cancel(msg
, hdr
);
1988 * batadv_tt_global_dump_entry - Dump one TT global entry into a message
1989 * @msg: Netlink message to dump into
1990 * @portid: Port making netlink request
1991 * @seq: Sequence number of netlink message
1992 * @bat_priv: The bat priv with all the soft interface information
1993 * @common: tt local & tt global common data
1994 * @sub_s: Number of entries to skip
1996 * This function assumes the caller holds rcu_read_lock().
1998 * Return: Error code, or 0 on success
2001 batadv_tt_global_dump_entry(struct sk_buff
*msg
, u32 portid
, u32 seq
,
2002 struct batadv_priv
*bat_priv
,
2003 struct batadv_tt_common_entry
*common
, int *sub_s
)
2005 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
;
2006 struct batadv_tt_global_entry
*global
;
2007 struct hlist_head
*head
;
2011 global
= container_of(common
, struct batadv_tt_global_entry
, common
);
2012 best_entry
= batadv_transtable_best_orig(bat_priv
, global
);
2013 head
= &global
->orig_list
;
2015 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
2019 best
= (orig_entry
== best_entry
);
2021 if (batadv_tt_global_dump_subentry(msg
, portid
, seq
, common
,
2022 orig_entry
, best
)) {
2033 * batadv_tt_global_dump_bucket - Dump one TT local bucket into a message
2034 * @msg: Netlink message to dump into
2035 * @portid: Port making netlink request
2036 * @seq: Sequence number of netlink message
2037 * @bat_priv: The bat priv with all the soft interface information
2038 * @head: Pointer to the list containing the global tt entries
2039 * @idx_s: Number of entries to skip
2040 * @sub: Number of entries to skip
2042 * Return: Error code, or 0 on success
2045 batadv_tt_global_dump_bucket(struct sk_buff
*msg
, u32 portid
, u32 seq
,
2046 struct batadv_priv
*bat_priv
,
2047 struct hlist_head
*head
, int *idx_s
, int *sub
)
2049 struct batadv_tt_common_entry
*common
;
2053 hlist_for_each_entry_rcu(common
, head
, hash_entry
) {
2057 if (batadv_tt_global_dump_entry(msg
, portid
, seq
, bat_priv
,
2072 * batadv_tt_global_dump - Dump TT global entries into a message
2073 * @msg: Netlink message to dump into
2074 * @cb: Parameters from query
2076 * Return: Error code, or length of message on success
2078 int batadv_tt_global_dump(struct sk_buff
*msg
, struct netlink_callback
*cb
)
2080 struct net
*net
= sock_net(cb
->skb
->sk
);
2081 struct net_device
*soft_iface
;
2082 struct batadv_priv
*bat_priv
;
2083 struct batadv_hard_iface
*primary_if
= NULL
;
2084 struct batadv_hashtable
*hash
;
2085 struct hlist_head
*head
;
2088 int bucket
= cb
->args
[0];
2089 int idx
= cb
->args
[1];
2090 int sub
= cb
->args
[2];
2091 int portid
= NETLINK_CB(cb
->skb
).portid
;
2093 ifindex
= batadv_netlink_get_ifindex(cb
->nlh
, BATADV_ATTR_MESH_IFINDEX
);
2097 soft_iface
= dev_get_by_index(net
, ifindex
);
2098 if (!soft_iface
|| !batadv_softif_is_valid(soft_iface
)) {
2103 bat_priv
= netdev_priv(soft_iface
);
2105 primary_if
= batadv_primary_if_get_selected(bat_priv
);
2106 if (!primary_if
|| primary_if
->if_status
!= BATADV_IF_ACTIVE
) {
2111 hash
= bat_priv
->tt
.global_hash
;
2113 while (bucket
< hash
->size
) {
2114 head
= &hash
->table
[bucket
];
2116 if (batadv_tt_global_dump_bucket(msg
, portid
,
2117 cb
->nlh
->nlmsg_seq
, bat_priv
,
2128 batadv_hardif_put(primary_if
);
2130 dev_put(soft_iface
);
2132 cb
->args
[0] = bucket
;
2140 * _batadv_tt_global_del_orig_entry - remove and free an orig_entry
2141 * @tt_global_entry: the global entry to remove the orig_entry from
2142 * @orig_entry: the orig entry to remove and free
2144 * Remove an orig_entry from its list in the given tt_global_entry and
2145 * free this orig_entry afterwards.
2147 * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is
2151 _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry
*tt_global_entry
,
2152 struct batadv_tt_orig_list_entry
*orig_entry
)
2154 lockdep_assert_held(&tt_global_entry
->list_lock
);
2156 batadv_tt_global_size_dec(orig_entry
->orig_node
,
2157 tt_global_entry
->common
.vid
);
2158 atomic_dec(&tt_global_entry
->orig_list_count
);
2159 /* requires holding tt_global_entry->list_lock and orig_entry->list
2160 * being part of a list
2162 hlist_del_rcu(&orig_entry
->list
);
2163 batadv_tt_orig_list_entry_put(orig_entry
);
2166 /* deletes the orig list of a tt_global_entry */
2168 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry
*tt_global_entry
)
2170 struct hlist_head
*head
;
2171 struct hlist_node
*safe
;
2172 struct batadv_tt_orig_list_entry
*orig_entry
;
2174 spin_lock_bh(&tt_global_entry
->list_lock
);
2175 head
= &tt_global_entry
->orig_list
;
2176 hlist_for_each_entry_safe(orig_entry
, safe
, head
, list
)
2177 _batadv_tt_global_del_orig_entry(tt_global_entry
, orig_entry
);
2178 spin_unlock_bh(&tt_global_entry
->list_lock
);
2182 * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry
2183 * @bat_priv: the bat priv with all the soft interface information
2184 * @tt_global_entry: the global entry to remove the orig_node from
2185 * @orig_node: the originator announcing the client
2186 * @message: message to append to the log on deletion
2188 * Remove the given orig_node and its according orig_entry from the given
2192 batadv_tt_global_del_orig_node(struct batadv_priv
*bat_priv
,
2193 struct batadv_tt_global_entry
*tt_global_entry
,
2194 struct batadv_orig_node
*orig_node
,
2195 const char *message
)
2197 struct hlist_head
*head
;
2198 struct hlist_node
*safe
;
2199 struct batadv_tt_orig_list_entry
*orig_entry
;
2202 spin_lock_bh(&tt_global_entry
->list_lock
);
2203 head
= &tt_global_entry
->orig_list
;
2204 hlist_for_each_entry_safe(orig_entry
, safe
, head
, list
) {
2205 if (orig_entry
->orig_node
== orig_node
) {
2206 vid
= tt_global_entry
->common
.vid
;
2207 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2208 "Deleting %pM from global tt entry %pM (vid: %d): %s\n",
2210 tt_global_entry
->common
.addr
,
2211 BATADV_PRINT_VID(vid
), message
);
2212 _batadv_tt_global_del_orig_entry(tt_global_entry
,
2216 spin_unlock_bh(&tt_global_entry
->list_lock
);
2219 /* If the client is to be deleted, we check if it is the last origantor entry
2220 * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the
2221 * timer, otherwise we simply remove the originator scheduled for deletion.
2224 batadv_tt_global_del_roaming(struct batadv_priv
*bat_priv
,
2225 struct batadv_tt_global_entry
*tt_global_entry
,
2226 struct batadv_orig_node
*orig_node
,
2227 const char *message
)
2229 bool last_entry
= true;
2230 struct hlist_head
*head
;
2231 struct batadv_tt_orig_list_entry
*orig_entry
;
2233 /* no local entry exists, case 1:
2234 * Check if this is the last one or if other entries exist.
2238 head
= &tt_global_entry
->orig_list
;
2239 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
2240 if (orig_entry
->orig_node
!= orig_node
) {
2248 /* its the last one, mark for roaming. */
2249 tt_global_entry
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
2250 tt_global_entry
->roam_at
= jiffies
;
2252 /* there is another entry, we can simply delete this
2253 * one and can still use the other one.
2255 batadv_tt_global_del_orig_node(bat_priv
, tt_global_entry
,
2256 orig_node
, message
);
2260 * batadv_tt_global_del - remove a client from the global table
2261 * @bat_priv: the bat priv with all the soft interface information
2262 * @orig_node: an originator serving this client
2263 * @addr: the mac address of the client
2264 * @vid: VLAN identifier
2265 * @message: a message explaining the reason for deleting the client to print
2266 * for debugging purpose
2267 * @roaming: true if the deletion has been triggered by a roaming event
2269 static void batadv_tt_global_del(struct batadv_priv
*bat_priv
,
2270 struct batadv_orig_node
*orig_node
,
2271 const unsigned char *addr
, unsigned short vid
,
2272 const char *message
, bool roaming
)
2274 struct batadv_tt_global_entry
*tt_global_entry
;
2275 struct batadv_tt_local_entry
*local_entry
= NULL
;
2277 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
2278 if (!tt_global_entry
)
2282 batadv_tt_global_del_orig_node(bat_priv
, tt_global_entry
,
2283 orig_node
, message
);
2285 if (hlist_empty(&tt_global_entry
->orig_list
))
2286 batadv_tt_global_free(bat_priv
, tt_global_entry
,
2292 /* if we are deleting a global entry due to a roam
2293 * event, there are two possibilities:
2294 * 1) the client roamed from node A to node B => if there
2295 * is only one originator left for this client, we mark
2296 * it with BATADV_TT_CLIENT_ROAM, we start a timer and we
2297 * wait for node B to claim it. In case of timeout
2298 * the entry is purged.
2300 * If there are other originators left, we directly delete
2302 * 2) the client roamed to us => we can directly delete
2303 * the global entry, since it is useless now.
2305 local_entry
= batadv_tt_local_hash_find(bat_priv
,
2306 tt_global_entry
->common
.addr
,
2309 /* local entry exists, case 2: client roamed to us. */
2310 batadv_tt_global_del_orig_list(tt_global_entry
);
2311 batadv_tt_global_free(bat_priv
, tt_global_entry
, message
);
2313 /* no local entry exists, case 1: check for roaming */
2314 batadv_tt_global_del_roaming(bat_priv
, tt_global_entry
,
2315 orig_node
, message
);
2318 if (tt_global_entry
)
2319 batadv_tt_global_entry_put(tt_global_entry
);
2321 batadv_tt_local_entry_put(local_entry
);
2325 * batadv_tt_global_del_orig - remove all the TT global entries belonging to the
2326 * given originator matching the provided vid
2327 * @bat_priv: the bat priv with all the soft interface information
2328 * @orig_node: the originator owning the entries to remove
2329 * @match_vid: the VLAN identifier to match. If negative all the entries will be
2331 * @message: debug message to print as "reason"
2333 void batadv_tt_global_del_orig(struct batadv_priv
*bat_priv
,
2334 struct batadv_orig_node
*orig_node
,
2336 const char *message
)
2338 struct batadv_tt_global_entry
*tt_global
;
2339 struct batadv_tt_common_entry
*tt_common_entry
;
2341 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
2342 struct hlist_node
*safe
;
2343 struct hlist_head
*head
;
2344 spinlock_t
*list_lock
; /* protects write access to the hash lists */
2350 for (i
= 0; i
< hash
->size
; i
++) {
2351 head
= &hash
->table
[i
];
2352 list_lock
= &hash
->list_locks
[i
];
2354 spin_lock_bh(list_lock
);
2355 hlist_for_each_entry_safe(tt_common_entry
, safe
,
2357 /* remove only matching entries */
2358 if (match_vid
>= 0 && tt_common_entry
->vid
!= match_vid
)
2361 tt_global
= container_of(tt_common_entry
,
2362 struct batadv_tt_global_entry
,
2365 batadv_tt_global_del_orig_node(bat_priv
, tt_global
,
2366 orig_node
, message
);
2368 if (hlist_empty(&tt_global
->orig_list
)) {
2369 vid
= tt_global
->common
.vid
;
2370 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2371 "Deleting global tt entry %pM (vid: %d): %s\n",
2372 tt_global
->common
.addr
,
2373 BATADV_PRINT_VID(vid
), message
);
2374 hlist_del_rcu(&tt_common_entry
->hash_entry
);
2375 batadv_tt_global_entry_put(tt_global
);
2378 spin_unlock_bh(list_lock
);
2380 clear_bit(BATADV_ORIG_CAPA_HAS_TT
, &orig_node
->capa_initialized
);
2383 static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry
*tt_global
,
2387 unsigned long roam_timeout
= BATADV_TT_CLIENT_ROAM_TIMEOUT
;
2388 unsigned long temp_timeout
= BATADV_TT_CLIENT_TEMP_TIMEOUT
;
2390 if ((tt_global
->common
.flags
& BATADV_TT_CLIENT_ROAM
) &&
2391 batadv_has_timed_out(tt_global
->roam_at
, roam_timeout
)) {
2393 *msg
= "Roaming timeout\n";
2396 if ((tt_global
->common
.flags
& BATADV_TT_CLIENT_TEMP
) &&
2397 batadv_has_timed_out(tt_global
->common
.added_at
, temp_timeout
)) {
2399 *msg
= "Temporary client timeout\n";
2405 static void batadv_tt_global_purge(struct batadv_priv
*bat_priv
)
2407 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
2408 struct hlist_head
*head
;
2409 struct hlist_node
*node_tmp
;
2410 spinlock_t
*list_lock
; /* protects write access to the hash lists */
2413 struct batadv_tt_common_entry
*tt_common
;
2414 struct batadv_tt_global_entry
*tt_global
;
2416 for (i
= 0; i
< hash
->size
; i
++) {
2417 head
= &hash
->table
[i
];
2418 list_lock
= &hash
->list_locks
[i
];
2420 spin_lock_bh(list_lock
);
2421 hlist_for_each_entry_safe(tt_common
, node_tmp
, head
,
2423 tt_global
= container_of(tt_common
,
2424 struct batadv_tt_global_entry
,
2427 if (!batadv_tt_global_to_purge(tt_global
, &msg
))
2430 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2431 "Deleting global tt entry %pM (vid: %d): %s\n",
2432 tt_global
->common
.addr
,
2433 BATADV_PRINT_VID(tt_global
->common
.vid
),
2436 hlist_del_rcu(&tt_common
->hash_entry
);
2438 batadv_tt_global_entry_put(tt_global
);
2440 spin_unlock_bh(list_lock
);
2444 static void batadv_tt_global_table_free(struct batadv_priv
*bat_priv
)
2446 struct batadv_hashtable
*hash
;
2447 spinlock_t
*list_lock
; /* protects write access to the hash lists */
2448 struct batadv_tt_common_entry
*tt_common_entry
;
2449 struct batadv_tt_global_entry
*tt_global
;
2450 struct hlist_node
*node_tmp
;
2451 struct hlist_head
*head
;
2454 if (!bat_priv
->tt
.global_hash
)
2457 hash
= bat_priv
->tt
.global_hash
;
2459 for (i
= 0; i
< hash
->size
; i
++) {
2460 head
= &hash
->table
[i
];
2461 list_lock
= &hash
->list_locks
[i
];
2463 spin_lock_bh(list_lock
);
2464 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
,
2466 hlist_del_rcu(&tt_common_entry
->hash_entry
);
2467 tt_global
= container_of(tt_common_entry
,
2468 struct batadv_tt_global_entry
,
2470 batadv_tt_global_entry_put(tt_global
);
2472 spin_unlock_bh(list_lock
);
2475 batadv_hash_destroy(hash
);
2477 bat_priv
->tt
.global_hash
= NULL
;
2481 _batadv_is_ap_isolated(struct batadv_tt_local_entry
*tt_local_entry
,
2482 struct batadv_tt_global_entry
*tt_global_entry
)
2486 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_WIFI
&&
2487 tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_WIFI
)
2490 /* check if the two clients are marked as isolated */
2491 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ISOLA
&&
2492 tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_ISOLA
)
2499 * batadv_transtable_search - get the mesh destination for a given client
2500 * @bat_priv: the bat priv with all the soft interface information
2501 * @src: mac address of the source client
2502 * @addr: mac address of the destination client
2503 * @vid: VLAN identifier
2505 * Return: a pointer to the originator that was selected as destination in the
2506 * mesh for contacting the client 'addr', NULL otherwise.
2507 * In case of multiple originators serving the same client, the function returns
2508 * the best one (best in terms of metric towards the destination node).
2510 * If the two clients are AP isolated the function returns NULL.
2512 struct batadv_orig_node
*batadv_transtable_search(struct batadv_priv
*bat_priv
,
2517 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
2518 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
2519 struct batadv_orig_node
*orig_node
= NULL
;
2520 struct batadv_tt_orig_list_entry
*best_entry
;
2522 if (src
&& batadv_vlan_ap_isola_get(bat_priv
, vid
)) {
2523 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, src
, vid
);
2524 if (!tt_local_entry
||
2525 (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
))
2529 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
2530 if (!tt_global_entry
)
2533 /* check whether the clients should not communicate due to AP
2536 if (tt_local_entry
&&
2537 _batadv_is_ap_isolated(tt_local_entry
, tt_global_entry
))
2541 best_entry
= batadv_transtable_best_orig(bat_priv
, tt_global_entry
);
2542 /* found anything? */
2544 orig_node
= best_entry
->orig_node
;
2545 if (orig_node
&& !kref_get_unless_zero(&orig_node
->refcount
))
2550 if (tt_global_entry
)
2551 batadv_tt_global_entry_put(tt_global_entry
);
2553 batadv_tt_local_entry_put(tt_local_entry
);
2559 * batadv_tt_global_crc - calculates the checksum of the local table belonging
2560 * to the given orig_node
2561 * @bat_priv: the bat priv with all the soft interface information
2562 * @orig_node: originator for which the CRC should be computed
2563 * @vid: VLAN identifier for which the CRC32 has to be computed
2565 * This function computes the checksum for the global table corresponding to a
2566 * specific originator. In particular, the checksum is computed as follows: For
2567 * each client connected to the originator the CRC32C of the MAC address and the
2568 * VID is computed and then all the CRC32Cs of the various clients are xor'ed
2571 * The idea behind is that CRC32C should be used as much as possible in order to
2572 * produce a unique hash of the table, but since the order which is used to feed
2573 * the CRC32C function affects the result and since every node in the network
2574 * probably sorts the clients differently, the hash function cannot be directly
2575 * computed over the entire table. Hence the CRC32C is used only on
2576 * the single client entry, while all the results are then xor'ed together
2577 * because the XOR operation can combine them all while trying to reduce the
2578 * noise as much as possible.
2580 * Return: the checksum of the global table of a given originator.
2582 static u32
batadv_tt_global_crc(struct batadv_priv
*bat_priv
,
2583 struct batadv_orig_node
*orig_node
,
2586 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
2587 struct batadv_tt_common_entry
*tt_common
;
2588 struct batadv_tt_global_entry
*tt_global
;
2589 struct hlist_head
*head
;
2590 u32 i
, crc_tmp
, crc
= 0;
2594 for (i
= 0; i
< hash
->size
; i
++) {
2595 head
= &hash
->table
[i
];
2598 hlist_for_each_entry_rcu(tt_common
, head
, hash_entry
) {
2599 tt_global
= container_of(tt_common
,
2600 struct batadv_tt_global_entry
,
2602 /* compute the CRC only for entries belonging to the
2603 * VLAN identified by the vid passed as parameter
2605 if (tt_common
->vid
!= vid
)
2608 /* Roaming clients are in the global table for
2609 * consistency only. They don't have to be
2610 * taken into account while computing the
2613 if (tt_common
->flags
& BATADV_TT_CLIENT_ROAM
)
2615 /* Temporary clients have not been announced yet, so
2616 * they have to be skipped while computing the global
2619 if (tt_common
->flags
& BATADV_TT_CLIENT_TEMP
)
2622 /* find out if this global entry is announced by this
2625 if (!batadv_tt_global_entry_has_orig(tt_global
,
2629 /* use network order to read the VID: this ensures that
2630 * every node reads the bytes in the same order.
2632 tmp_vid
= htons(tt_common
->vid
);
2633 crc_tmp
= crc32c(0, &tmp_vid
, sizeof(tmp_vid
));
2635 /* compute the CRC on flags that have to be kept in sync
2638 flags
= tt_common
->flags
& BATADV_TT_SYNC_MASK
;
2639 crc_tmp
= crc32c(crc_tmp
, &flags
, sizeof(flags
));
2641 crc
^= crc32c(crc_tmp
, tt_common
->addr
, ETH_ALEN
);
2650 * batadv_tt_local_crc - calculates the checksum of the local table
2651 * @bat_priv: the bat priv with all the soft interface information
2652 * @vid: VLAN identifier for which the CRC32 has to be computed
2654 * For details about the computation, please refer to the documentation for
2655 * batadv_tt_global_crc().
2657 * Return: the checksum of the local table
2659 static u32
batadv_tt_local_crc(struct batadv_priv
*bat_priv
,
2662 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
2663 struct batadv_tt_common_entry
*tt_common
;
2664 struct hlist_head
*head
;
2665 u32 i
, crc_tmp
, crc
= 0;
2669 for (i
= 0; i
< hash
->size
; i
++) {
2670 head
= &hash
->table
[i
];
2673 hlist_for_each_entry_rcu(tt_common
, head
, hash_entry
) {
2674 /* compute the CRC only for entries belonging to the
2675 * VLAN identified by vid
2677 if (tt_common
->vid
!= vid
)
2680 /* not yet committed clients have not to be taken into
2681 * account while computing the CRC
2683 if (tt_common
->flags
& BATADV_TT_CLIENT_NEW
)
2686 /* use network order to read the VID: this ensures that
2687 * every node reads the bytes in the same order.
2689 tmp_vid
= htons(tt_common
->vid
);
2690 crc_tmp
= crc32c(0, &tmp_vid
, sizeof(tmp_vid
));
2692 /* compute the CRC on flags that have to be kept in sync
2695 flags
= tt_common
->flags
& BATADV_TT_SYNC_MASK
;
2696 crc_tmp
= crc32c(crc_tmp
, &flags
, sizeof(flags
));
2698 crc
^= crc32c(crc_tmp
, tt_common
->addr
, ETH_ALEN
);
2707 * batadv_tt_req_node_release - free tt_req node entry
2708 * @ref: kref pointer of the tt req_node entry
2710 static void batadv_tt_req_node_release(struct kref
*ref
)
2712 struct batadv_tt_req_node
*tt_req_node
;
2714 tt_req_node
= container_of(ref
, struct batadv_tt_req_node
, refcount
);
2716 kmem_cache_free(batadv_tt_req_cache
, tt_req_node
);
2720 * batadv_tt_req_node_put - decrement the tt_req_node refcounter and
2721 * possibly release it
2722 * @tt_req_node: tt_req_node to be free'd
2724 static void batadv_tt_req_node_put(struct batadv_tt_req_node
*tt_req_node
)
2726 kref_put(&tt_req_node
->refcount
, batadv_tt_req_node_release
);
2729 static void batadv_tt_req_list_free(struct batadv_priv
*bat_priv
)
2731 struct batadv_tt_req_node
*node
;
2732 struct hlist_node
*safe
;
2734 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2736 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
2737 hlist_del_init(&node
->list
);
2738 batadv_tt_req_node_put(node
);
2741 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2744 static void batadv_tt_save_orig_buffer(struct batadv_priv
*bat_priv
,
2745 struct batadv_orig_node
*orig_node
,
2746 const void *tt_buff
,
2749 /* Replace the old buffer only if I received something in the
2750 * last OGM (the OGM could carry no changes)
2752 spin_lock_bh(&orig_node
->tt_buff_lock
);
2753 if (tt_buff_len
> 0) {
2754 kfree(orig_node
->tt_buff
);
2755 orig_node
->tt_buff_len
= 0;
2756 orig_node
->tt_buff
= kmalloc(tt_buff_len
, GFP_ATOMIC
);
2757 if (orig_node
->tt_buff
) {
2758 memcpy(orig_node
->tt_buff
, tt_buff
, tt_buff_len
);
2759 orig_node
->tt_buff_len
= tt_buff_len
;
2762 spin_unlock_bh(&orig_node
->tt_buff_lock
);
2765 static void batadv_tt_req_purge(struct batadv_priv
*bat_priv
)
2767 struct batadv_tt_req_node
*node
;
2768 struct hlist_node
*safe
;
2770 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2771 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
2772 if (batadv_has_timed_out(node
->issued_at
,
2773 BATADV_TT_REQUEST_TIMEOUT
)) {
2774 hlist_del_init(&node
->list
);
2775 batadv_tt_req_node_put(node
);
2778 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2782 * batadv_tt_req_node_new - search and possibly create a tt_req_node object
2783 * @bat_priv: the bat priv with all the soft interface information
2784 * @orig_node: orig node this request is being issued for
2786 * Return: the pointer to the new tt_req_node struct if no request
2787 * has already been issued for this orig_node, NULL otherwise.
2789 static struct batadv_tt_req_node
*
2790 batadv_tt_req_node_new(struct batadv_priv
*bat_priv
,
2791 struct batadv_orig_node
*orig_node
)
2793 struct batadv_tt_req_node
*tt_req_node_tmp
, *tt_req_node
= NULL
;
2795 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2796 hlist_for_each_entry(tt_req_node_tmp
, &bat_priv
->tt
.req_list
, list
) {
2797 if (batadv_compare_eth(tt_req_node_tmp
, orig_node
) &&
2798 !batadv_has_timed_out(tt_req_node_tmp
->issued_at
,
2799 BATADV_TT_REQUEST_TIMEOUT
))
2803 tt_req_node
= kmem_cache_alloc(batadv_tt_req_cache
, GFP_ATOMIC
);
2807 kref_init(&tt_req_node
->refcount
);
2808 ether_addr_copy(tt_req_node
->addr
, orig_node
->orig
);
2809 tt_req_node
->issued_at
= jiffies
;
2811 kref_get(&tt_req_node
->refcount
);
2812 hlist_add_head(&tt_req_node
->list
, &bat_priv
->tt
.req_list
);
2814 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2819 * batadv_tt_local_valid - verify that given tt entry is a valid one
2820 * @entry_ptr: to be checked local tt entry
2821 * @data_ptr: not used but definition required to satisfy the callback prototype
2823 * Return: true if the entry is a valid, false otherwise.
2825 static bool batadv_tt_local_valid(const void *entry_ptr
, const void *data_ptr
)
2827 const struct batadv_tt_common_entry
*tt_common_entry
= entry_ptr
;
2829 if (tt_common_entry
->flags
& BATADV_TT_CLIENT_NEW
)
2834 static bool batadv_tt_global_valid(const void *entry_ptr
,
2835 const void *data_ptr
)
2837 const struct batadv_tt_common_entry
*tt_common_entry
= entry_ptr
;
2838 const struct batadv_tt_global_entry
*tt_global_entry
;
2839 const struct batadv_orig_node
*orig_node
= data_ptr
;
2841 if (tt_common_entry
->flags
& BATADV_TT_CLIENT_ROAM
||
2842 tt_common_entry
->flags
& BATADV_TT_CLIENT_TEMP
)
2845 tt_global_entry
= container_of(tt_common_entry
,
2846 struct batadv_tt_global_entry
,
2849 return batadv_tt_global_entry_has_orig(tt_global_entry
, orig_node
);
2853 * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the
2855 * @bat_priv: the bat priv with all the soft interface information
2856 * @hash: hash table containing the tt entries
2857 * @tt_len: expected tvlv tt data buffer length in number of bytes
2858 * @tvlv_buff: pointer to the buffer to fill with the TT data
2859 * @valid_cb: function to filter tt change entries
2860 * @cb_data: data passed to the filter function as argument
2862 static void batadv_tt_tvlv_generate(struct batadv_priv
*bat_priv
,
2863 struct batadv_hashtable
*hash
,
2864 void *tvlv_buff
, u16 tt_len
,
2865 bool (*valid_cb
)(const void *,
2869 struct batadv_tt_common_entry
*tt_common_entry
;
2870 struct batadv_tvlv_tt_change
*tt_change
;
2871 struct hlist_head
*head
;
2872 u16 tt_tot
, tt_num_entries
= 0;
2875 tt_tot
= batadv_tt_entries(tt_len
);
2876 tt_change
= (struct batadv_tvlv_tt_change
*)tvlv_buff
;
2879 for (i
= 0; i
< hash
->size
; i
++) {
2880 head
= &hash
->table
[i
];
2882 hlist_for_each_entry_rcu(tt_common_entry
,
2884 if (tt_tot
== tt_num_entries
)
2887 if ((valid_cb
) && (!valid_cb(tt_common_entry
, cb_data
)))
2890 ether_addr_copy(tt_change
->addr
, tt_common_entry
->addr
);
2891 tt_change
->flags
= tt_common_entry
->flags
;
2892 tt_change
->vid
= htons(tt_common_entry
->vid
);
2893 memset(tt_change
->reserved
, 0,
2894 sizeof(tt_change
->reserved
));
2904 * batadv_tt_global_check_crc - check if all the CRCs are correct
2905 * @orig_node: originator for which the CRCs have to be checked
2906 * @tt_vlan: pointer to the first tvlv VLAN entry
2907 * @num_vlan: number of tvlv VLAN entries
2909 * Return: true if all the received CRCs match the locally stored ones, false
2912 static bool batadv_tt_global_check_crc(struct batadv_orig_node
*orig_node
,
2913 struct batadv_tvlv_tt_vlan_data
*tt_vlan
,
2916 struct batadv_tvlv_tt_vlan_data
*tt_vlan_tmp
;
2917 struct batadv_orig_node_vlan
*vlan
;
2918 int i
, orig_num_vlan
;
2921 /* check if each received CRC matches the locally stored one */
2922 for (i
= 0; i
< num_vlan
; i
++) {
2923 tt_vlan_tmp
= tt_vlan
+ i
;
2925 /* if orig_node is a backbone node for this VLAN, don't check
2926 * the CRC as we ignore all the global entries over it
2928 if (batadv_bla_is_backbone_gw_orig(orig_node
->bat_priv
,
2930 ntohs(tt_vlan_tmp
->vid
)))
2933 vlan
= batadv_orig_node_vlan_get(orig_node
,
2934 ntohs(tt_vlan_tmp
->vid
));
2939 batadv_orig_node_vlan_put(vlan
);
2941 if (crc
!= ntohl(tt_vlan_tmp
->crc
))
2945 /* check if any excess VLANs exist locally for the originator
2946 * which are not mentioned in the TVLV from the originator.
2950 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
)
2954 if (orig_num_vlan
> num_vlan
)
2961 * batadv_tt_local_update_crc - update all the local CRCs
2962 * @bat_priv: the bat priv with all the soft interface information
2964 static void batadv_tt_local_update_crc(struct batadv_priv
*bat_priv
)
2966 struct batadv_softif_vlan
*vlan
;
2968 /* recompute the global CRC for each VLAN */
2970 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
2971 vlan
->tt
.crc
= batadv_tt_local_crc(bat_priv
, vlan
->vid
);
2977 * batadv_tt_global_update_crc - update all the global CRCs for this orig_node
2978 * @bat_priv: the bat priv with all the soft interface information
2979 * @orig_node: the orig_node for which the CRCs have to be updated
2981 static void batadv_tt_global_update_crc(struct batadv_priv
*bat_priv
,
2982 struct batadv_orig_node
*orig_node
)
2984 struct batadv_orig_node_vlan
*vlan
;
2987 /* recompute the global CRC for each VLAN */
2989 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
) {
2990 /* if orig_node is a backbone node for this VLAN, don't compute
2991 * the CRC as we ignore all the global entries over it
2993 if (batadv_bla_is_backbone_gw_orig(bat_priv
, orig_node
->orig
,
2997 crc
= batadv_tt_global_crc(bat_priv
, orig_node
, vlan
->vid
);
3004 * batadv_send_tt_request - send a TT Request message to a given node
3005 * @bat_priv: the bat priv with all the soft interface information
3006 * @dst_orig_node: the destination of the message
3007 * @ttvn: the version number that the source of the message is looking for
3008 * @tt_vlan: pointer to the first tvlv VLAN object to request
3009 * @num_vlan: number of tvlv VLAN entries
3010 * @full_table: ask for the entire translation table if true, while only for the
3011 * last TT diff otherwise
3013 * Return: true if the TT Request was sent, false otherwise
3015 static bool batadv_send_tt_request(struct batadv_priv
*bat_priv
,
3016 struct batadv_orig_node
*dst_orig_node
,
3018 struct batadv_tvlv_tt_vlan_data
*tt_vlan
,
3019 u16 num_vlan
, bool full_table
)
3021 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
3022 struct batadv_tt_req_node
*tt_req_node
= NULL
;
3023 struct batadv_tvlv_tt_vlan_data
*tt_vlan_req
;
3024 struct batadv_hard_iface
*primary_if
;
3028 primary_if
= batadv_primary_if_get_selected(bat_priv
);
3032 /* The new tt_req will be issued only if I'm not waiting for a
3033 * reply from the same orig_node yet
3035 tt_req_node
= batadv_tt_req_node_new(bat_priv
, dst_orig_node
);
3039 size
= sizeof(*tvlv_tt_data
) + sizeof(*tt_vlan_req
) * num_vlan
;
3040 tvlv_tt_data
= kzalloc(size
, GFP_ATOMIC
);
3044 tvlv_tt_data
->flags
= BATADV_TT_REQUEST
;
3045 tvlv_tt_data
->ttvn
= ttvn
;
3046 tvlv_tt_data
->num_vlan
= htons(num_vlan
);
3048 /* send all the CRCs within the request. This is needed by intermediate
3049 * nodes to ensure they have the correct table before replying
3051 tt_vlan_req
= (struct batadv_tvlv_tt_vlan_data
*)(tvlv_tt_data
+ 1);
3052 for (i
= 0; i
< num_vlan
; i
++) {
3053 tt_vlan_req
->vid
= tt_vlan
->vid
;
3054 tt_vlan_req
->crc
= tt_vlan
->crc
;
3061 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
3063 batadv_dbg(BATADV_DBG_TT
, bat_priv
, "Sending TT_REQUEST to %pM [%c]\n",
3064 dst_orig_node
->orig
, full_table
? 'F' : '.');
3066 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_REQUEST_TX
);
3067 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
3068 dst_orig_node
->orig
, BATADV_TVLV_TT
, 1,
3069 tvlv_tt_data
, size
);
3074 batadv_hardif_put(primary_if
);
3076 if (ret
&& tt_req_node
) {
3077 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
3078 if (!hlist_unhashed(&tt_req_node
->list
)) {
3079 hlist_del_init(&tt_req_node
->list
);
3080 batadv_tt_req_node_put(tt_req_node
);
3082 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
3086 batadv_tt_req_node_put(tt_req_node
);
3088 kfree(tvlv_tt_data
);
3093 * batadv_send_other_tt_response - send reply to tt request concerning another
3094 * node's translation table
3095 * @bat_priv: the bat priv with all the soft interface information
3096 * @tt_data: tt data containing the tt request information
3097 * @req_src: mac address of tt request sender
3098 * @req_dst: mac address of tt request recipient
3100 * Return: true if tt request reply was sent, false otherwise.
3102 static bool batadv_send_other_tt_response(struct batadv_priv
*bat_priv
,
3103 struct batadv_tvlv_tt_data
*tt_data
,
3104 u8
*req_src
, u8
*req_dst
)
3106 struct batadv_orig_node
*req_dst_orig_node
;
3107 struct batadv_orig_node
*res_dst_orig_node
= NULL
;
3108 struct batadv_tvlv_tt_change
*tt_change
;
3109 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
3110 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
3111 bool ret
= false, full_table
;
3112 u8 orig_ttvn
, req_ttvn
;
3116 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3117 "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n",
3118 req_src
, tt_data
->ttvn
, req_dst
,
3119 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
3121 /* Let's get the orig node of the REAL destination */
3122 req_dst_orig_node
= batadv_orig_hash_find(bat_priv
, req_dst
);
3123 if (!req_dst_orig_node
)
3126 res_dst_orig_node
= batadv_orig_hash_find(bat_priv
, req_src
);
3127 if (!res_dst_orig_node
)
3130 orig_ttvn
= (u8
)atomic_read(&req_dst_orig_node
->last_ttvn
);
3131 req_ttvn
= tt_data
->ttvn
;
3133 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(tt_data
+ 1);
3134 /* this node doesn't have the requested data */
3135 if (orig_ttvn
!= req_ttvn
||
3136 !batadv_tt_global_check_crc(req_dst_orig_node
, tt_vlan
,
3137 ntohs(tt_data
->num_vlan
)))
3140 /* If the full table has been explicitly requested */
3141 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
||
3142 !req_dst_orig_node
->tt_buff
)
3147 /* TT fragmentation hasn't been implemented yet, so send as many
3148 * TT entries fit a single packet as possible only
3151 spin_lock_bh(&req_dst_orig_node
->tt_buff_lock
);
3152 tt_len
= req_dst_orig_node
->tt_buff_len
;
3154 tvlv_len
= batadv_tt_prepare_tvlv_global_data(req_dst_orig_node
,
3161 /* Copy the last orig_node's OGM buffer */
3162 memcpy(tt_change
, req_dst_orig_node
->tt_buff
,
3163 req_dst_orig_node
->tt_buff_len
);
3164 spin_unlock_bh(&req_dst_orig_node
->tt_buff_lock
);
3166 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3167 * in the initial part
3170 tvlv_len
= batadv_tt_prepare_tvlv_global_data(req_dst_orig_node
,
3177 /* fill the rest of the tvlv with the real TT entries */
3178 batadv_tt_tvlv_generate(bat_priv
, bat_priv
->tt
.global_hash
,
3180 batadv_tt_global_valid
,
3184 /* Don't send the response, if larger than fragmented packet. */
3185 tt_len
= sizeof(struct batadv_unicast_tvlv_packet
) + tvlv_len
;
3186 if (tt_len
> atomic_read(&bat_priv
->packet_size_max
)) {
3187 net_ratelimited_function(batadv_info
, bat_priv
->soft_iface
,
3188 "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n",
3189 res_dst_orig_node
->orig
);
3193 tvlv_tt_data
->flags
= BATADV_TT_RESPONSE
;
3194 tvlv_tt_data
->ttvn
= req_ttvn
;
3197 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
3199 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3200 "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n",
3201 res_dst_orig_node
->orig
, req_dst_orig_node
->orig
,
3202 full_table
? 'F' : '.', req_ttvn
);
3204 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_TX
);
3206 batadv_tvlv_unicast_send(bat_priv
, req_dst_orig_node
->orig
,
3207 req_src
, BATADV_TVLV_TT
, 1, tvlv_tt_data
,
3214 spin_unlock_bh(&req_dst_orig_node
->tt_buff_lock
);
3217 if (res_dst_orig_node
)
3218 batadv_orig_node_put(res_dst_orig_node
);
3219 if (req_dst_orig_node
)
3220 batadv_orig_node_put(req_dst_orig_node
);
3221 kfree(tvlv_tt_data
);
3226 * batadv_send_my_tt_response - send reply to tt request concerning this node's
3228 * @bat_priv: the bat priv with all the soft interface information
3229 * @tt_data: tt data containing the tt request information
3230 * @req_src: mac address of tt request sender
3232 * Return: true if tt request reply was sent, false otherwise.
3234 static bool batadv_send_my_tt_response(struct batadv_priv
*bat_priv
,
3235 struct batadv_tvlv_tt_data
*tt_data
,
3238 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
3239 struct batadv_hard_iface
*primary_if
= NULL
;
3240 struct batadv_tvlv_tt_change
*tt_change
;
3241 struct batadv_orig_node
*orig_node
;
3242 u8 my_ttvn
, req_ttvn
;
3247 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3248 "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
3249 req_src
, tt_data
->ttvn
,
3250 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
3252 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
3254 my_ttvn
= (u8
)atomic_read(&bat_priv
->tt
.vn
);
3255 req_ttvn
= tt_data
->ttvn
;
3257 orig_node
= batadv_orig_hash_find(bat_priv
, req_src
);
3261 primary_if
= batadv_primary_if_get_selected(bat_priv
);
3265 /* If the full table has been explicitly requested or the gap
3266 * is too big send the whole local translation table
3268 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
|| my_ttvn
!= req_ttvn
||
3269 !bat_priv
->tt
.last_changeset
)
3274 /* TT fragmentation hasn't been implemented yet, so send as many
3275 * TT entries fit a single packet as possible only
3278 spin_lock_bh(&bat_priv
->tt
.last_changeset_lock
);
3280 tt_len
= bat_priv
->tt
.last_changeset_len
;
3281 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
,
3288 /* Copy the last orig_node's OGM buffer */
3289 memcpy(tt_change
, bat_priv
->tt
.last_changeset
,
3290 bat_priv
->tt
.last_changeset_len
);
3291 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
3293 req_ttvn
= (u8
)atomic_read(&bat_priv
->tt
.vn
);
3295 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3296 * in the initial part
3299 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
,
3306 /* fill the rest of the tvlv with the real TT entries */
3307 batadv_tt_tvlv_generate(bat_priv
, bat_priv
->tt
.local_hash
,
3309 batadv_tt_local_valid
, NULL
);
3312 tvlv_tt_data
->flags
= BATADV_TT_RESPONSE
;
3313 tvlv_tt_data
->ttvn
= req_ttvn
;
3316 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
3318 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3319 "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n",
3320 orig_node
->orig
, full_table
? 'F' : '.', req_ttvn
);
3322 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_TX
);
3324 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
3325 req_src
, BATADV_TVLV_TT
, 1, tvlv_tt_data
,
3331 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
3333 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
3335 batadv_orig_node_put(orig_node
);
3337 batadv_hardif_put(primary_if
);
3338 kfree(tvlv_tt_data
);
3339 /* The packet was for this host, so it doesn't need to be re-routed */
3344 * batadv_send_tt_response - send reply to tt request
3345 * @bat_priv: the bat priv with all the soft interface information
3346 * @tt_data: tt data containing the tt request information
3347 * @req_src: mac address of tt request sender
3348 * @req_dst: mac address of tt request recipient
3350 * Return: true if tt request reply was sent, false otherwise.
3352 static bool batadv_send_tt_response(struct batadv_priv
*bat_priv
,
3353 struct batadv_tvlv_tt_data
*tt_data
,
3354 u8
*req_src
, u8
*req_dst
)
3356 if (batadv_is_my_mac(bat_priv
, req_dst
))
3357 return batadv_send_my_tt_response(bat_priv
, tt_data
, req_src
);
3358 return batadv_send_other_tt_response(bat_priv
, tt_data
, req_src
,
3362 static void _batadv_tt_update_changes(struct batadv_priv
*bat_priv
,
3363 struct batadv_orig_node
*orig_node
,
3364 struct batadv_tvlv_tt_change
*tt_change
,
3365 u16 tt_num_changes
, u8 ttvn
)
3370 for (i
= 0; i
< tt_num_changes
; i
++) {
3371 if ((tt_change
+ i
)->flags
& BATADV_TT_CLIENT_DEL
) {
3372 roams
= (tt_change
+ i
)->flags
& BATADV_TT_CLIENT_ROAM
;
3373 batadv_tt_global_del(bat_priv
, orig_node
,
3374 (tt_change
+ i
)->addr
,
3375 ntohs((tt_change
+ i
)->vid
),
3376 "tt removed by changes",
3379 if (!batadv_tt_global_add(bat_priv
, orig_node
,
3380 (tt_change
+ i
)->addr
,
3381 ntohs((tt_change
+ i
)->vid
),
3382 (tt_change
+ i
)->flags
, ttvn
))
3383 /* In case of problem while storing a
3384 * global_entry, we stop the updating
3385 * procedure without committing the
3386 * ttvn change. This will avoid to send
3387 * corrupted data on tt_request
3392 set_bit(BATADV_ORIG_CAPA_HAS_TT
, &orig_node
->capa_initialized
);
3395 static void batadv_tt_fill_gtable(struct batadv_priv
*bat_priv
,
3396 struct batadv_tvlv_tt_change
*tt_change
,
3397 u8 ttvn
, u8
*resp_src
,
3400 struct batadv_orig_node
*orig_node
;
3402 orig_node
= batadv_orig_hash_find(bat_priv
, resp_src
);
3406 /* Purge the old table first.. */
3407 batadv_tt_global_del_orig(bat_priv
, orig_node
, -1,
3408 "Received full table");
3410 _batadv_tt_update_changes(bat_priv
, orig_node
, tt_change
, num_entries
,
3413 spin_lock_bh(&orig_node
->tt_buff_lock
);
3414 kfree(orig_node
->tt_buff
);
3415 orig_node
->tt_buff_len
= 0;
3416 orig_node
->tt_buff
= NULL
;
3417 spin_unlock_bh(&orig_node
->tt_buff_lock
);
3419 atomic_set(&orig_node
->last_ttvn
, ttvn
);
3423 batadv_orig_node_put(orig_node
);
3426 static void batadv_tt_update_changes(struct batadv_priv
*bat_priv
,
3427 struct batadv_orig_node
*orig_node
,
3428 u16 tt_num_changes
, u8 ttvn
,
3429 struct batadv_tvlv_tt_change
*tt_change
)
3431 _batadv_tt_update_changes(bat_priv
, orig_node
, tt_change
,
3432 tt_num_changes
, ttvn
);
3434 batadv_tt_save_orig_buffer(bat_priv
, orig_node
, tt_change
,
3435 batadv_tt_len(tt_num_changes
));
3436 atomic_set(&orig_node
->last_ttvn
, ttvn
);
3440 * batadv_is_my_client - check if a client is served by the local node
3441 * @bat_priv: the bat priv with all the soft interface information
3442 * @addr: the mac address of the client to check
3443 * @vid: VLAN identifier
3445 * Return: true if the client is served by this node, false otherwise.
3447 bool batadv_is_my_client(struct batadv_priv
*bat_priv
, const u8
*addr
,
3450 struct batadv_tt_local_entry
*tt_local_entry
;
3453 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
3454 if (!tt_local_entry
)
3456 /* Check if the client has been logically deleted (but is kept for
3457 * consistency purpose)
3459 if ((tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
) ||
3460 (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
))
3465 batadv_tt_local_entry_put(tt_local_entry
);
3470 * batadv_handle_tt_response - process incoming tt reply
3471 * @bat_priv: the bat priv with all the soft interface information
3472 * @tt_data: tt data containing the tt request information
3473 * @resp_src: mac address of tt reply sender
3474 * @num_entries: number of tt change entries appended to the tt data
3476 static void batadv_handle_tt_response(struct batadv_priv
*bat_priv
,
3477 struct batadv_tvlv_tt_data
*tt_data
,
3478 u8
*resp_src
, u16 num_entries
)
3480 struct batadv_tt_req_node
*node
;
3481 struct hlist_node
*safe
;
3482 struct batadv_orig_node
*orig_node
= NULL
;
3483 struct batadv_tvlv_tt_change
*tt_change
;
3484 u8
*tvlv_ptr
= (u8
*)tt_data
;
3487 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3488 "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
3489 resp_src
, tt_data
->ttvn
, num_entries
,
3490 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
3492 orig_node
= batadv_orig_hash_find(bat_priv
, resp_src
);
3496 spin_lock_bh(&orig_node
->tt_lock
);
3498 change_offset
= sizeof(struct batadv_tvlv_tt_vlan_data
);
3499 change_offset
*= ntohs(tt_data
->num_vlan
);
3500 change_offset
+= sizeof(*tt_data
);
3501 tvlv_ptr
+= change_offset
;
3503 tt_change
= (struct batadv_tvlv_tt_change
*)tvlv_ptr
;
3504 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
) {
3505 batadv_tt_fill_gtable(bat_priv
, tt_change
, tt_data
->ttvn
,
3506 resp_src
, num_entries
);
3508 batadv_tt_update_changes(bat_priv
, orig_node
, num_entries
,
3509 tt_data
->ttvn
, tt_change
);
3512 /* Recalculate the CRC for this orig_node and store it */
3513 batadv_tt_global_update_crc(bat_priv
, orig_node
);
3515 spin_unlock_bh(&orig_node
->tt_lock
);
3517 /* Delete the tt_req_node from pending tt_requests list */
3518 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
3519 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
3520 if (!batadv_compare_eth(node
->addr
, resp_src
))
3522 hlist_del_init(&node
->list
);
3523 batadv_tt_req_node_put(node
);
3526 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
3529 batadv_orig_node_put(orig_node
);
3532 static void batadv_tt_roam_list_free(struct batadv_priv
*bat_priv
)
3534 struct batadv_tt_roam_node
*node
, *safe
;
3536 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3538 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.roam_list
, list
) {
3539 list_del(&node
->list
);
3540 kmem_cache_free(batadv_tt_roam_cache
, node
);
3543 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3546 static void batadv_tt_roam_purge(struct batadv_priv
*bat_priv
)
3548 struct batadv_tt_roam_node
*node
, *safe
;
3550 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3551 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.roam_list
, list
) {
3552 if (!batadv_has_timed_out(node
->first_time
,
3553 BATADV_ROAMING_MAX_TIME
))
3556 list_del(&node
->list
);
3557 kmem_cache_free(batadv_tt_roam_cache
, node
);
3559 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3563 * batadv_tt_check_roam_count - check if a client has roamed too frequently
3564 * @bat_priv: the bat priv with all the soft interface information
3565 * @client: mac address of the roaming client
3567 * This function checks whether the client already reached the
3568 * maximum number of possible roaming phases. In this case the ROAMING_ADV
3571 * Return: true if the ROAMING_ADV can be sent, false otherwise
3573 static bool batadv_tt_check_roam_count(struct batadv_priv
*bat_priv
, u8
*client
)
3575 struct batadv_tt_roam_node
*tt_roam_node
;
3578 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3579 /* The new tt_req will be issued only if I'm not waiting for a
3580 * reply from the same orig_node yet
3582 list_for_each_entry(tt_roam_node
, &bat_priv
->tt
.roam_list
, list
) {
3583 if (!batadv_compare_eth(tt_roam_node
->addr
, client
))
3586 if (batadv_has_timed_out(tt_roam_node
->first_time
,
3587 BATADV_ROAMING_MAX_TIME
))
3590 if (!batadv_atomic_dec_not_zero(&tt_roam_node
->counter
))
3591 /* Sorry, you roamed too many times! */
3598 tt_roam_node
= kmem_cache_alloc(batadv_tt_roam_cache
,
3603 tt_roam_node
->first_time
= jiffies
;
3604 atomic_set(&tt_roam_node
->counter
,
3605 BATADV_ROAMING_MAX_COUNT
- 1);
3606 ether_addr_copy(tt_roam_node
->addr
, client
);
3608 list_add(&tt_roam_node
->list
, &bat_priv
->tt
.roam_list
);
3613 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3618 * batadv_send_roam_adv - send a roaming advertisement message
3619 * @bat_priv: the bat priv with all the soft interface information
3620 * @client: mac address of the roaming client
3621 * @vid: VLAN identifier
3622 * @orig_node: message destination
3624 * Send a ROAMING_ADV message to the node which was previously serving this
3625 * client. This is done to inform the node that from now on all traffic destined
3626 * for this particular roamed client has to be forwarded to the sender of the
3629 static void batadv_send_roam_adv(struct batadv_priv
*bat_priv
, u8
*client
,
3631 struct batadv_orig_node
*orig_node
)
3633 struct batadv_hard_iface
*primary_if
;
3634 struct batadv_tvlv_roam_adv tvlv_roam
;
3636 primary_if
= batadv_primary_if_get_selected(bat_priv
);
3640 /* before going on we have to check whether the client has
3641 * already roamed to us too many times
3643 if (!batadv_tt_check_roam_count(bat_priv
, client
))
3646 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3647 "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n",
3648 orig_node
->orig
, client
, BATADV_PRINT_VID(vid
));
3650 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_ROAM_ADV_TX
);
3652 memcpy(tvlv_roam
.client
, client
, sizeof(tvlv_roam
.client
));
3653 tvlv_roam
.vid
= htons(vid
);
3655 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
3656 orig_node
->orig
, BATADV_TVLV_ROAM
, 1,
3657 &tvlv_roam
, sizeof(tvlv_roam
));
3661 batadv_hardif_put(primary_if
);
3664 static void batadv_tt_purge(struct work_struct
*work
)
3666 struct delayed_work
*delayed_work
;
3667 struct batadv_priv_tt
*priv_tt
;
3668 struct batadv_priv
*bat_priv
;
3670 delayed_work
= to_delayed_work(work
);
3671 priv_tt
= container_of(delayed_work
, struct batadv_priv_tt
, work
);
3672 bat_priv
= container_of(priv_tt
, struct batadv_priv
, tt
);
3674 batadv_tt_local_purge(bat_priv
, BATADV_TT_LOCAL_TIMEOUT
);
3675 batadv_tt_global_purge(bat_priv
);
3676 batadv_tt_req_purge(bat_priv
);
3677 batadv_tt_roam_purge(bat_priv
);
3679 queue_delayed_work(batadv_event_workqueue
, &bat_priv
->tt
.work
,
3680 msecs_to_jiffies(BATADV_TT_WORK_PERIOD
));
3683 void batadv_tt_free(struct batadv_priv
*bat_priv
)
3685 batadv_tvlv_container_unregister(bat_priv
, BATADV_TVLV_TT
, 1);
3686 batadv_tvlv_handler_unregister(bat_priv
, BATADV_TVLV_TT
, 1);
3688 cancel_delayed_work_sync(&bat_priv
->tt
.work
);
3690 batadv_tt_local_table_free(bat_priv
);
3691 batadv_tt_global_table_free(bat_priv
);
3692 batadv_tt_req_list_free(bat_priv
);
3693 batadv_tt_changes_list_free(bat_priv
);
3694 batadv_tt_roam_list_free(bat_priv
);
3696 kfree(bat_priv
->tt
.last_changeset
);
3700 * batadv_tt_local_set_flags - set or unset the specified flags on the local
3701 * table and possibly count them in the TT size
3702 * @bat_priv: the bat priv with all the soft interface information
3703 * @flags: the flag to switch
3704 * @enable: whether to set or unset the flag
3705 * @count: whether to increase the TT size by the number of changed entries
3707 static void batadv_tt_local_set_flags(struct batadv_priv
*bat_priv
, u16 flags
,
3708 bool enable
, bool count
)
3710 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
3711 struct batadv_tt_common_entry
*tt_common_entry
;
3712 u16 changed_num
= 0;
3713 struct hlist_head
*head
;
3719 for (i
= 0; i
< hash
->size
; i
++) {
3720 head
= &hash
->table
[i
];
3723 hlist_for_each_entry_rcu(tt_common_entry
,
3726 if ((tt_common_entry
->flags
& flags
) == flags
)
3728 tt_common_entry
->flags
|= flags
;
3730 if (!(tt_common_entry
->flags
& flags
))
3732 tt_common_entry
->flags
&= ~flags
;
3739 batadv_tt_local_size_inc(bat_priv
,
3740 tt_common_entry
->vid
);
3746 /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */
3747 static void batadv_tt_local_purge_pending_clients(struct batadv_priv
*bat_priv
)
3749 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
3750 struct batadv_tt_common_entry
*tt_common
;
3751 struct batadv_tt_local_entry
*tt_local
;
3752 struct hlist_node
*node_tmp
;
3753 struct hlist_head
*head
;
3754 spinlock_t
*list_lock
; /* protects write access to the hash lists */
3760 for (i
= 0; i
< hash
->size
; i
++) {
3761 head
= &hash
->table
[i
];
3762 list_lock
= &hash
->list_locks
[i
];
3764 spin_lock_bh(list_lock
);
3765 hlist_for_each_entry_safe(tt_common
, node_tmp
, head
,
3767 if (!(tt_common
->flags
& BATADV_TT_CLIENT_PENDING
))
3770 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3771 "Deleting local tt entry (%pM, vid: %d): pending\n",
3773 BATADV_PRINT_VID(tt_common
->vid
));
3775 batadv_tt_local_size_dec(bat_priv
, tt_common
->vid
);
3776 hlist_del_rcu(&tt_common
->hash_entry
);
3777 tt_local
= container_of(tt_common
,
3778 struct batadv_tt_local_entry
,
3781 batadv_tt_local_entry_put(tt_local
);
3783 spin_unlock_bh(list_lock
);
3788 * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes
3789 * which have been queued in the time since the last commit
3790 * @bat_priv: the bat priv with all the soft interface information
3792 * Caller must hold tt->commit_lock.
3794 static void batadv_tt_local_commit_changes_nolock(struct batadv_priv
*bat_priv
)
3796 lockdep_assert_held(&bat_priv
->tt
.commit_lock
);
3798 /* Update multicast addresses in local translation table */
3799 batadv_mcast_mla_update(bat_priv
);
3801 if (atomic_read(&bat_priv
->tt
.local_changes
) < 1) {
3802 if (!batadv_atomic_dec_not_zero(&bat_priv
->tt
.ogm_append_cnt
))
3803 batadv_tt_tvlv_container_update(bat_priv
);
3807 batadv_tt_local_set_flags(bat_priv
, BATADV_TT_CLIENT_NEW
, false, true);
3809 batadv_tt_local_purge_pending_clients(bat_priv
);
3810 batadv_tt_local_update_crc(bat_priv
);
3812 /* Increment the TTVN only once per OGM interval */
3813 atomic_inc(&bat_priv
->tt
.vn
);
3814 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3815 "Local changes committed, updating to ttvn %u\n",
3816 (u8
)atomic_read(&bat_priv
->tt
.vn
));
3818 /* reset the sending counter */
3819 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, BATADV_TT_OGM_APPEND_MAX
);
3820 batadv_tt_tvlv_container_update(bat_priv
);
3824 * batadv_tt_local_commit_changes - commit all pending local tt changes which
3825 * have been queued in the time since the last commit
3826 * @bat_priv: the bat priv with all the soft interface information
3828 void batadv_tt_local_commit_changes(struct batadv_priv
*bat_priv
)
3830 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
3831 batadv_tt_local_commit_changes_nolock(bat_priv
);
3832 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
3835 bool batadv_is_ap_isolated(struct batadv_priv
*bat_priv
, u8
*src
, u8
*dst
,
3838 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
3839 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
3840 struct batadv_softif_vlan
*vlan
;
3843 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
3847 if (!atomic_read(&vlan
->ap_isolation
))
3850 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, dst
, vid
);
3851 if (!tt_local_entry
)
3854 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, src
, vid
);
3855 if (!tt_global_entry
)
3858 if (!_batadv_is_ap_isolated(tt_local_entry
, tt_global_entry
))
3864 batadv_softif_vlan_put(vlan
);
3865 if (tt_global_entry
)
3866 batadv_tt_global_entry_put(tt_global_entry
);
3868 batadv_tt_local_entry_put(tt_local_entry
);
3873 * batadv_tt_update_orig - update global translation table with new tt
3874 * information received via ogms
3875 * @bat_priv: the bat priv with all the soft interface information
3876 * @orig_node: the orig_node of the ogm
3877 * @tt_buff: pointer to the first tvlv VLAN entry
3878 * @tt_num_vlan: number of tvlv VLAN entries
3879 * @tt_change: pointer to the first entry in the TT buffer
3880 * @tt_num_changes: number of tt changes inside the tt buffer
3881 * @ttvn: translation table version number of this changeset
3883 static void batadv_tt_update_orig(struct batadv_priv
*bat_priv
,
3884 struct batadv_orig_node
*orig_node
,
3885 const void *tt_buff
, u16 tt_num_vlan
,
3886 struct batadv_tvlv_tt_change
*tt_change
,
3887 u16 tt_num_changes
, u8 ttvn
)
3889 u8 orig_ttvn
= (u8
)atomic_read(&orig_node
->last_ttvn
);
3890 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
3891 bool full_table
= true;
3894 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)tt_buff
;
3895 has_tt_init
= test_bit(BATADV_ORIG_CAPA_HAS_TT
,
3896 &orig_node
->capa_initialized
);
3898 /* orig table not initialised AND first diff is in the OGM OR the ttvn
3899 * increased by one -> we can apply the attached changes
3901 if ((!has_tt_init
&& ttvn
== 1) || ttvn
- orig_ttvn
== 1) {
3902 /* the OGM could not contain the changes due to their size or
3903 * because they have already been sent BATADV_TT_OGM_APPEND_MAX
3905 * In this case send a tt request
3907 if (!tt_num_changes
) {
3912 spin_lock_bh(&orig_node
->tt_lock
);
3914 batadv_tt_update_changes(bat_priv
, orig_node
, tt_num_changes
,
3917 /* Even if we received the precomputed crc with the OGM, we
3918 * prefer to recompute it to spot any possible inconsistency
3919 * in the global table
3921 batadv_tt_global_update_crc(bat_priv
, orig_node
);
3923 spin_unlock_bh(&orig_node
->tt_lock
);
3925 /* The ttvn alone is not enough to guarantee consistency
3926 * because a single value could represent different states
3927 * (due to the wrap around). Thus a node has to check whether
3928 * the resulting table (after applying the changes) is still
3929 * consistent or not. E.g. a node could disconnect while its
3930 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
3931 * checking the CRC value is mandatory to detect the
3934 if (!batadv_tt_global_check_crc(orig_node
, tt_vlan
,
3938 /* if we missed more than one change or our tables are not
3939 * in sync anymore -> request fresh tt data
3941 if (!has_tt_init
|| ttvn
!= orig_ttvn
||
3942 !batadv_tt_global_check_crc(orig_node
, tt_vlan
,
3945 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3946 "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n",
3947 orig_node
->orig
, ttvn
, orig_ttvn
,
3949 batadv_send_tt_request(bat_priv
, orig_node
, ttvn
,
3950 tt_vlan
, tt_num_vlan
,
3958 * batadv_tt_global_client_is_roaming - check if a client is marked as roaming
3959 * @bat_priv: the bat priv with all the soft interface information
3960 * @addr: the mac address of the client to check
3961 * @vid: VLAN identifier
3963 * Return: true if we know that the client has moved from its old originator
3964 * to another one. This entry is still kept for consistency purposes and will be
3965 * deleted later by a DEL or because of timeout
3967 bool batadv_tt_global_client_is_roaming(struct batadv_priv
*bat_priv
,
3968 u8
*addr
, unsigned short vid
)
3970 struct batadv_tt_global_entry
*tt_global_entry
;
3973 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
3974 if (!tt_global_entry
)
3977 ret
= tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
;
3978 batadv_tt_global_entry_put(tt_global_entry
);
3984 * batadv_tt_local_client_is_roaming - tells whether the client is roaming
3985 * @bat_priv: the bat priv with all the soft interface information
3986 * @addr: the mac address of the local client to query
3987 * @vid: VLAN identifier
3989 * Return: true if the local client is known to be roaming (it is not served by
3990 * this node anymore) or not. If yes, the client is still present in the table
3991 * to keep the latter consistent with the node TTVN
3993 bool batadv_tt_local_client_is_roaming(struct batadv_priv
*bat_priv
,
3994 u8
*addr
, unsigned short vid
)
3996 struct batadv_tt_local_entry
*tt_local_entry
;
3999 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
4000 if (!tt_local_entry
)
4003 ret
= tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
;
4004 batadv_tt_local_entry_put(tt_local_entry
);
4009 bool batadv_tt_add_temporary_global_entry(struct batadv_priv
*bat_priv
,
4010 struct batadv_orig_node
*orig_node
,
4011 const unsigned char *addr
,
4016 if (!batadv_tt_global_add(bat_priv
, orig_node
, addr
, vid
,
4017 BATADV_TT_CLIENT_TEMP
,
4018 atomic_read(&orig_node
->last_ttvn
)))
4021 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
4022 "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n",
4023 addr
, BATADV_PRINT_VID(vid
), orig_node
->orig
);
4030 * batadv_tt_local_resize_to_mtu - resize the local translation table fit the
4031 * maximum packet size that can be transported through the mesh
4032 * @soft_iface: netdev struct of the mesh interface
4034 * Remove entries older than 'timeout' and half timeout if more entries need
4037 void batadv_tt_local_resize_to_mtu(struct net_device
*soft_iface
)
4039 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
4040 int packet_size_max
= atomic_read(&bat_priv
->packet_size_max
);
4041 int table_size
, timeout
= BATADV_TT_LOCAL_TIMEOUT
/ 2;
4042 bool reduced
= false;
4044 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
4047 table_size
= batadv_tt_local_table_transmit_size(bat_priv
);
4048 if (packet_size_max
>= table_size
)
4051 batadv_tt_local_purge(bat_priv
, timeout
);
4052 batadv_tt_local_purge_pending_clients(bat_priv
);
4056 net_ratelimited_function(batadv_info
, soft_iface
,
4057 "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n",
4061 /* commit these changes immediately, to avoid synchronization problem
4065 batadv_tt_local_commit_changes_nolock(bat_priv
);
4067 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
4071 * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container
4072 * @bat_priv: the bat priv with all the soft interface information
4073 * @orig: the orig_node of the ogm
4074 * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
4075 * @tvlv_value: tvlv buffer containing the gateway data
4076 * @tvlv_value_len: tvlv buffer length
4078 static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv
*bat_priv
,
4079 struct batadv_orig_node
*orig
,
4080 u8 flags
, void *tvlv_value
,
4083 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
4084 struct batadv_tvlv_tt_change
*tt_change
;
4085 struct batadv_tvlv_tt_data
*tt_data
;
4086 u16 num_entries
, num_vlan
;
4088 if (tvlv_value_len
< sizeof(*tt_data
))
4091 tt_data
= (struct batadv_tvlv_tt_data
*)tvlv_value
;
4092 tvlv_value_len
-= sizeof(*tt_data
);
4094 num_vlan
= ntohs(tt_data
->num_vlan
);
4096 if (tvlv_value_len
< sizeof(*tt_vlan
) * num_vlan
)
4099 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(tt_data
+ 1);
4100 tt_change
= (struct batadv_tvlv_tt_change
*)(tt_vlan
+ num_vlan
);
4101 tvlv_value_len
-= sizeof(*tt_vlan
) * num_vlan
;
4103 num_entries
= batadv_tt_entries(tvlv_value_len
);
4105 batadv_tt_update_orig(bat_priv
, orig
, tt_vlan
, num_vlan
, tt_change
,
4106 num_entries
, tt_data
->ttvn
);
4110 * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv
4112 * @bat_priv: the bat priv with all the soft interface information
4113 * @src: mac address of tt tvlv sender
4114 * @dst: mac address of tt tvlv recipient
4115 * @tvlv_value: tvlv buffer containing the tt data
4116 * @tvlv_value_len: tvlv buffer length
4118 * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS
4121 static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv
*bat_priv
,
4126 struct batadv_tvlv_tt_data
*tt_data
;
4127 u16 tt_vlan_len
, tt_num_entries
;
4131 if (tvlv_value_len
< sizeof(*tt_data
))
4132 return NET_RX_SUCCESS
;
4134 tt_data
= (struct batadv_tvlv_tt_data
*)tvlv_value
;
4135 tvlv_value_len
-= sizeof(*tt_data
);
4137 tt_vlan_len
= sizeof(struct batadv_tvlv_tt_vlan_data
);
4138 tt_vlan_len
*= ntohs(tt_data
->num_vlan
);
4140 if (tvlv_value_len
< tt_vlan_len
)
4141 return NET_RX_SUCCESS
;
4143 tvlv_value_len
-= tt_vlan_len
;
4144 tt_num_entries
= batadv_tt_entries(tvlv_value_len
);
4146 switch (tt_data
->flags
& BATADV_TT_DATA_TYPE_MASK
) {
4147 case BATADV_TT_REQUEST
:
4148 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_REQUEST_RX
);
4150 /* If this node cannot provide a TT response the tt_request is
4153 ret
= batadv_send_tt_response(bat_priv
, tt_data
, src
, dst
);
4155 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
)
4160 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
4161 "Routing TT_REQUEST to %pM [%c]\n",
4163 /* tvlv API will re-route the packet */
4167 case BATADV_TT_RESPONSE
:
4168 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_RX
);
4170 if (batadv_is_my_mac(bat_priv
, dst
)) {
4171 batadv_handle_tt_response(bat_priv
, tt_data
,
4172 src
, tt_num_entries
);
4173 return NET_RX_SUCCESS
;
4176 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
)
4181 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
4182 "Routing TT_RESPONSE to %pM [%c]\n", dst
, tt_flag
);
4184 /* tvlv API will re-route the packet */
4188 return NET_RX_SUCCESS
;
4192 * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container
4193 * @bat_priv: the bat priv with all the soft interface information
4194 * @src: mac address of tt tvlv sender
4195 * @dst: mac address of tt tvlv recipient
4196 * @tvlv_value: tvlv buffer containing the tt data
4197 * @tvlv_value_len: tvlv buffer length
4199 * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS
4202 static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv
*bat_priv
,
4207 struct batadv_tvlv_roam_adv
*roaming_adv
;
4208 struct batadv_orig_node
*orig_node
= NULL
;
4210 /* If this node is not the intended recipient of the
4211 * roaming advertisement the packet is forwarded
4212 * (the tvlv API will re-route the packet).
4214 if (!batadv_is_my_mac(bat_priv
, dst
))
4217 if (tvlv_value_len
< sizeof(*roaming_adv
))
4220 orig_node
= batadv_orig_hash_find(bat_priv
, src
);
4224 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_ROAM_ADV_RX
);
4225 roaming_adv
= (struct batadv_tvlv_roam_adv
*)tvlv_value
;
4227 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
4228 "Received ROAMING_ADV from %pM (client %pM)\n",
4229 src
, roaming_adv
->client
);
4231 batadv_tt_global_add(bat_priv
, orig_node
, roaming_adv
->client
,
4232 ntohs(roaming_adv
->vid
), BATADV_TT_CLIENT_ROAM
,
4233 atomic_read(&orig_node
->last_ttvn
) + 1);
4237 batadv_orig_node_put(orig_node
);
4238 return NET_RX_SUCCESS
;
4242 * batadv_tt_init - initialise the translation table internals
4243 * @bat_priv: the bat priv with all the soft interface information
4245 * Return: 0 on success or negative error number in case of failure.
4247 int batadv_tt_init(struct batadv_priv
*bat_priv
)
4251 /* synchronized flags must be remote */
4252 BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK
& BATADV_TT_REMOTE_MASK
));
4254 ret
= batadv_tt_local_init(bat_priv
);
4258 ret
= batadv_tt_global_init(bat_priv
);
4262 batadv_tvlv_handler_register(bat_priv
, batadv_tt_tvlv_ogm_handler_v1
,
4263 batadv_tt_tvlv_unicast_handler_v1
,
4264 BATADV_TVLV_TT
, 1, BATADV_NO_FLAGS
);
4266 batadv_tvlv_handler_register(bat_priv
, NULL
,
4267 batadv_roam_tvlv_unicast_handler_v1
,
4268 BATADV_TVLV_ROAM
, 1, BATADV_NO_FLAGS
);
4270 INIT_DELAYED_WORK(&bat_priv
->tt
.work
, batadv_tt_purge
);
4271 queue_delayed_work(batadv_event_workqueue
, &bat_priv
->tt
.work
,
4272 msecs_to_jiffies(BATADV_TT_WORK_PERIOD
));
4278 * batadv_tt_global_is_isolated - check if a client is marked as isolated
4279 * @bat_priv: the bat priv with all the soft interface information
4280 * @addr: the mac address of the client
4281 * @vid: the identifier of the VLAN where this client is connected
4283 * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false
4286 bool batadv_tt_global_is_isolated(struct batadv_priv
*bat_priv
,
4287 const u8
*addr
, unsigned short vid
)
4289 struct batadv_tt_global_entry
*tt
;
4292 tt
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
4296 ret
= tt
->common
.flags
& BATADV_TT_CLIENT_ISOLA
;
4298 batadv_tt_global_entry_put(tt
);
4304 * batadv_tt_cache_init - Initialize tt memory object cache
4306 * Return: 0 on success or negative error number in case of failure.
4308 int __init
batadv_tt_cache_init(void)
4310 size_t tl_size
= sizeof(struct batadv_tt_local_entry
);
4311 size_t tg_size
= sizeof(struct batadv_tt_global_entry
);
4312 size_t tt_orig_size
= sizeof(struct batadv_tt_orig_list_entry
);
4313 size_t tt_change_size
= sizeof(struct batadv_tt_change_node
);
4314 size_t tt_req_size
= sizeof(struct batadv_tt_req_node
);
4315 size_t tt_roam_size
= sizeof(struct batadv_tt_roam_node
);
4317 batadv_tl_cache
= kmem_cache_create("batadv_tl_cache", tl_size
, 0,
4318 SLAB_HWCACHE_ALIGN
, NULL
);
4319 if (!batadv_tl_cache
)
4322 batadv_tg_cache
= kmem_cache_create("batadv_tg_cache", tg_size
, 0,
4323 SLAB_HWCACHE_ALIGN
, NULL
);
4324 if (!batadv_tg_cache
)
4325 goto err_tt_tl_destroy
;
4327 batadv_tt_orig_cache
= kmem_cache_create("batadv_tt_orig_cache",
4329 SLAB_HWCACHE_ALIGN
, NULL
);
4330 if (!batadv_tt_orig_cache
)
4331 goto err_tt_tg_destroy
;
4333 batadv_tt_change_cache
= kmem_cache_create("batadv_tt_change_cache",
4335 SLAB_HWCACHE_ALIGN
, NULL
);
4336 if (!batadv_tt_change_cache
)
4337 goto err_tt_orig_destroy
;
4339 batadv_tt_req_cache
= kmem_cache_create("batadv_tt_req_cache",
4341 SLAB_HWCACHE_ALIGN
, NULL
);
4342 if (!batadv_tt_req_cache
)
4343 goto err_tt_change_destroy
;
4345 batadv_tt_roam_cache
= kmem_cache_create("batadv_tt_roam_cache",
4347 SLAB_HWCACHE_ALIGN
, NULL
);
4348 if (!batadv_tt_roam_cache
)
4349 goto err_tt_req_destroy
;
4354 kmem_cache_destroy(batadv_tt_req_cache
);
4355 batadv_tt_req_cache
= NULL
;
4356 err_tt_change_destroy
:
4357 kmem_cache_destroy(batadv_tt_change_cache
);
4358 batadv_tt_change_cache
= NULL
;
4359 err_tt_orig_destroy
:
4360 kmem_cache_destroy(batadv_tt_orig_cache
);
4361 batadv_tt_orig_cache
= NULL
;
4363 kmem_cache_destroy(batadv_tg_cache
);
4364 batadv_tg_cache
= NULL
;
4366 kmem_cache_destroy(batadv_tl_cache
);
4367 batadv_tl_cache
= NULL
;
4373 * batadv_tt_cache_destroy - Destroy tt memory object cache
4375 void batadv_tt_cache_destroy(void)
4377 kmem_cache_destroy(batadv_tl_cache
);
4378 kmem_cache_destroy(batadv_tg_cache
);
4379 kmem_cache_destroy(batadv_tt_orig_cache
);
4380 kmem_cache_destroy(batadv_tt_change_cache
);
4381 kmem_cache_destroy(batadv_tt_req_cache
);
4382 kmem_cache_destroy(batadv_tt_roam_cache
);