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 kref_get(&tt_local
->common
.refcount
);
738 tt_local
->last_seen
= jiffies
;
739 tt_local
->common
.added_at
= tt_local
->last_seen
;
740 tt_local
->vlan
= vlan
;
742 /* the batman interface mac and multicast addresses should never be
745 if (batadv_compare_eth(addr
, soft_iface
->dev_addr
) ||
746 is_multicast_ether_addr(addr
))
747 tt_local
->common
.flags
|= BATADV_TT_CLIENT_NOPURGE
;
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 int batadv_tt_local_seq_print_text(struct seq_file
*seq
, void *offset
)
1052 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1053 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
1054 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
1055 struct batadv_tt_common_entry
*tt_common_entry
;
1056 struct batadv_tt_local_entry
*tt_local
;
1057 struct batadv_hard_iface
*primary_if
;
1058 struct hlist_head
*head
;
1061 int last_seen_msecs
;
1062 unsigned long last_seen_jiffies
;
1064 u16 np_flag
= BATADV_TT_CLIENT_NOPURGE
;
1066 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
1071 "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n",
1072 net_dev
->name
, (u8
)atomic_read(&bat_priv
->tt
.vn
));
1074 " Client VID Flags Last seen (CRC )\n");
1076 for (i
= 0; i
< hash
->size
; i
++) {
1077 head
= &hash
->table
[i
];
1080 hlist_for_each_entry_rcu(tt_common_entry
,
1082 tt_local
= container_of(tt_common_entry
,
1083 struct batadv_tt_local_entry
,
1085 last_seen_jiffies
= jiffies
- tt_local
->last_seen
;
1086 last_seen_msecs
= jiffies_to_msecs(last_seen_jiffies
);
1087 last_seen_secs
= last_seen_msecs
/ 1000;
1088 last_seen_msecs
= last_seen_msecs
% 1000;
1090 no_purge
= tt_common_entry
->flags
& np_flag
;
1092 " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n",
1093 tt_common_entry
->addr
,
1094 BATADV_PRINT_VID(tt_common_entry
->vid
),
1095 ((tt_common_entry
->flags
&
1096 BATADV_TT_CLIENT_ROAM
) ? 'R' : '.'),
1097 no_purge
? 'P' : '.',
1098 ((tt_common_entry
->flags
&
1099 BATADV_TT_CLIENT_NEW
) ? 'N' : '.'),
1100 ((tt_common_entry
->flags
&
1101 BATADV_TT_CLIENT_PENDING
) ? 'X' : '.'),
1102 ((tt_common_entry
->flags
&
1103 BATADV_TT_CLIENT_WIFI
) ? 'W' : '.'),
1104 ((tt_common_entry
->flags
&
1105 BATADV_TT_CLIENT_ISOLA
) ? 'I' : '.'),
1106 no_purge
? 0 : last_seen_secs
,
1107 no_purge
? 0 : last_seen_msecs
,
1108 tt_local
->vlan
->tt
.crc
);
1114 batadv_hardif_put(primary_if
);
1119 * batadv_tt_local_dump_entry - Dump one TT local entry into a message
1120 * @msg :Netlink message to dump into
1121 * @portid: Port making netlink request
1122 * @seq: Sequence number of netlink message
1123 * @bat_priv: The bat priv with all the soft interface information
1124 * @common: tt local & tt global common data
1126 * Return: Error code, or 0 on success
1129 batadv_tt_local_dump_entry(struct sk_buff
*msg
, u32 portid
, u32 seq
,
1130 struct batadv_priv
*bat_priv
,
1131 struct batadv_tt_common_entry
*common
)
1134 struct batadv_softif_vlan
*vlan
;
1135 struct batadv_tt_local_entry
*local
;
1136 unsigned int last_seen_msecs
;
1139 local
= container_of(common
, struct batadv_tt_local_entry
, common
);
1140 last_seen_msecs
= jiffies_to_msecs(jiffies
- local
->last_seen
);
1142 vlan
= batadv_softif_vlan_get(bat_priv
, common
->vid
);
1148 batadv_softif_vlan_put(vlan
);
1150 hdr
= genlmsg_put(msg
, portid
, seq
, &batadv_netlink_family
,
1152 BATADV_CMD_GET_TRANSTABLE_LOCAL
);
1156 if (nla_put(msg
, BATADV_ATTR_TT_ADDRESS
, ETH_ALEN
, common
->addr
) ||
1157 nla_put_u32(msg
, BATADV_ATTR_TT_CRC32
, crc
) ||
1158 nla_put_u16(msg
, BATADV_ATTR_TT_VID
, common
->vid
) ||
1159 nla_put_u32(msg
, BATADV_ATTR_TT_FLAGS
, common
->flags
))
1160 goto nla_put_failure
;
1162 if (!(common
->flags
& BATADV_TT_CLIENT_NOPURGE
) &&
1163 nla_put_u32(msg
, BATADV_ATTR_LAST_SEEN_MSECS
, last_seen_msecs
))
1164 goto nla_put_failure
;
1166 genlmsg_end(msg
, hdr
);
1170 genlmsg_cancel(msg
, hdr
);
1175 * batadv_tt_local_dump_bucket - Dump one TT local bucket into a message
1176 * @msg: Netlink message to dump into
1177 * @portid: Port making netlink request
1178 * @seq: Sequence number of netlink message
1179 * @bat_priv: The bat priv with all the soft interface information
1180 * @head: Pointer to the list containing the local tt entries
1181 * @idx_s: Number of entries to skip
1183 * Return: Error code, or 0 on success
1186 batadv_tt_local_dump_bucket(struct sk_buff
*msg
, u32 portid
, u32 seq
,
1187 struct batadv_priv
*bat_priv
,
1188 struct hlist_head
*head
, int *idx_s
)
1190 struct batadv_tt_common_entry
*common
;
1194 hlist_for_each_entry_rcu(common
, head
, hash_entry
) {
1198 if (batadv_tt_local_dump_entry(msg
, portid
, seq
, bat_priv
,
1212 * batadv_tt_local_dump - Dump TT local entries into a message
1213 * @msg: Netlink message to dump into
1214 * @cb: Parameters from query
1216 * Return: Error code, or 0 on success
1218 int batadv_tt_local_dump(struct sk_buff
*msg
, struct netlink_callback
*cb
)
1220 struct net
*net
= sock_net(cb
->skb
->sk
);
1221 struct net_device
*soft_iface
;
1222 struct batadv_priv
*bat_priv
;
1223 struct batadv_hard_iface
*primary_if
= NULL
;
1224 struct batadv_hashtable
*hash
;
1225 struct hlist_head
*head
;
1228 int bucket
= cb
->args
[0];
1229 int idx
= cb
->args
[1];
1230 int portid
= NETLINK_CB(cb
->skb
).portid
;
1232 ifindex
= batadv_netlink_get_ifindex(cb
->nlh
, BATADV_ATTR_MESH_IFINDEX
);
1236 soft_iface
= dev_get_by_index(net
, ifindex
);
1237 if (!soft_iface
|| !batadv_softif_is_valid(soft_iface
)) {
1242 bat_priv
= netdev_priv(soft_iface
);
1244 primary_if
= batadv_primary_if_get_selected(bat_priv
);
1245 if (!primary_if
|| primary_if
->if_status
!= BATADV_IF_ACTIVE
) {
1250 hash
= bat_priv
->tt
.local_hash
;
1252 while (bucket
< hash
->size
) {
1253 head
= &hash
->table
[bucket
];
1255 if (batadv_tt_local_dump_bucket(msg
, portid
, cb
->nlh
->nlmsg_seq
,
1256 bat_priv
, head
, &idx
))
1266 batadv_hardif_put(primary_if
);
1268 dev_put(soft_iface
);
1270 cb
->args
[0] = bucket
;
1277 batadv_tt_local_set_pending(struct batadv_priv
*bat_priv
,
1278 struct batadv_tt_local_entry
*tt_local_entry
,
1279 u16 flags
, const char *message
)
1281 batadv_tt_local_event(bat_priv
, tt_local_entry
, flags
);
1283 /* The local client has to be marked as "pending to be removed" but has
1284 * to be kept in the table in order to send it in a full table
1285 * response issued before the net ttvn increment (consistency check)
1287 tt_local_entry
->common
.flags
|= BATADV_TT_CLIENT_PENDING
;
1289 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1290 "Local tt entry (%pM, vid: %d) pending to be removed: %s\n",
1291 tt_local_entry
->common
.addr
,
1292 BATADV_PRINT_VID(tt_local_entry
->common
.vid
), message
);
1296 * batadv_tt_local_remove - logically remove an entry from the local table
1297 * @bat_priv: the bat priv with all the soft interface information
1298 * @addr: the MAC address of the client to remove
1299 * @vid: VLAN identifier
1300 * @message: message to append to the log on deletion
1301 * @roaming: true if the deletion is due to a roaming event
1303 * Return: the flags assigned to the local entry before being deleted
1305 u16
batadv_tt_local_remove(struct batadv_priv
*bat_priv
, const u8
*addr
,
1306 unsigned short vid
, const char *message
,
1309 struct batadv_tt_local_entry
*tt_local_entry
;
1310 u16 flags
, curr_flags
= BATADV_NO_FLAGS
;
1311 void *tt_entry_exists
;
1313 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
1314 if (!tt_local_entry
)
1317 curr_flags
= tt_local_entry
->common
.flags
;
1319 flags
= BATADV_TT_CLIENT_DEL
;
1320 /* if this global entry addition is due to a roaming, the node has to
1321 * mark the local entry as "roamed" in order to correctly reroute
1325 flags
|= BATADV_TT_CLIENT_ROAM
;
1326 /* mark the local client as ROAMed */
1327 tt_local_entry
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
1330 if (!(tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NEW
)) {
1331 batadv_tt_local_set_pending(bat_priv
, tt_local_entry
, flags
,
1335 /* if this client has been added right now, it is possible to
1336 * immediately purge it
1338 batadv_tt_local_event(bat_priv
, tt_local_entry
, BATADV_TT_CLIENT_DEL
);
1340 tt_entry_exists
= batadv_hash_remove(bat_priv
->tt
.local_hash
,
1343 &tt_local_entry
->common
);
1344 if (!tt_entry_exists
)
1347 /* extra call to free the local tt entry */
1348 batadv_tt_local_entry_put(tt_local_entry
);
1352 batadv_tt_local_entry_put(tt_local_entry
);
1358 * batadv_tt_local_purge_list - purge inactive tt local entries
1359 * @bat_priv: the bat priv with all the soft interface information
1360 * @head: pointer to the list containing the local tt entries
1361 * @timeout: parameter deciding whether a given tt local entry is considered
1364 static void batadv_tt_local_purge_list(struct batadv_priv
*bat_priv
,
1365 struct hlist_head
*head
,
1368 struct batadv_tt_local_entry
*tt_local_entry
;
1369 struct batadv_tt_common_entry
*tt_common_entry
;
1370 struct hlist_node
*node_tmp
;
1372 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
, head
,
1374 tt_local_entry
= container_of(tt_common_entry
,
1375 struct batadv_tt_local_entry
,
1377 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NOPURGE
)
1380 /* entry already marked for deletion */
1381 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
)
1384 if (!batadv_has_timed_out(tt_local_entry
->last_seen
, timeout
))
1387 batadv_tt_local_set_pending(bat_priv
, tt_local_entry
,
1388 BATADV_TT_CLIENT_DEL
, "timed out");
1393 * batadv_tt_local_purge - purge inactive tt local entries
1394 * @bat_priv: the bat priv with all the soft interface information
1395 * @timeout: parameter deciding whether a given tt local entry is considered
1398 static void batadv_tt_local_purge(struct batadv_priv
*bat_priv
,
1401 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
1402 struct hlist_head
*head
;
1403 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1406 for (i
= 0; i
< hash
->size
; i
++) {
1407 head
= &hash
->table
[i
];
1408 list_lock
= &hash
->list_locks
[i
];
1410 spin_lock_bh(list_lock
);
1411 batadv_tt_local_purge_list(bat_priv
, head
, timeout
);
1412 spin_unlock_bh(list_lock
);
1416 static void batadv_tt_local_table_free(struct batadv_priv
*bat_priv
)
1418 struct batadv_hashtable
*hash
;
1419 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1420 struct batadv_tt_common_entry
*tt_common_entry
;
1421 struct batadv_tt_local_entry
*tt_local
;
1422 struct hlist_node
*node_tmp
;
1423 struct hlist_head
*head
;
1426 if (!bat_priv
->tt
.local_hash
)
1429 hash
= bat_priv
->tt
.local_hash
;
1431 for (i
= 0; i
< hash
->size
; i
++) {
1432 head
= &hash
->table
[i
];
1433 list_lock
= &hash
->list_locks
[i
];
1435 spin_lock_bh(list_lock
);
1436 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
,
1438 hlist_del_rcu(&tt_common_entry
->hash_entry
);
1439 tt_local
= container_of(tt_common_entry
,
1440 struct batadv_tt_local_entry
,
1443 batadv_tt_local_entry_put(tt_local
);
1445 spin_unlock_bh(list_lock
);
1448 batadv_hash_destroy(hash
);
1450 bat_priv
->tt
.local_hash
= NULL
;
1453 static int batadv_tt_global_init(struct batadv_priv
*bat_priv
)
1455 if (bat_priv
->tt
.global_hash
)
1458 bat_priv
->tt
.global_hash
= batadv_hash_new(1024);
1460 if (!bat_priv
->tt
.global_hash
)
1463 batadv_hash_set_lock_class(bat_priv
->tt
.global_hash
,
1464 &batadv_tt_global_hash_lock_class_key
);
1469 static void batadv_tt_changes_list_free(struct batadv_priv
*bat_priv
)
1471 struct batadv_tt_change_node
*entry
, *safe
;
1473 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
1475 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
1477 list_del(&entry
->list
);
1478 kmem_cache_free(batadv_tt_change_cache
, entry
);
1481 atomic_set(&bat_priv
->tt
.local_changes
, 0);
1482 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
1486 * batadv_tt_global_orig_entry_find - find a TT orig_list_entry
1487 * @entry: the TT global entry where the orig_list_entry has to be
1489 * @orig_node: the originator for which the orig_list_entry has to be found
1491 * retrieve the orig_tt_list_entry belonging to orig_node from the
1492 * batadv_tt_global_entry list
1494 * Return: it with an increased refcounter, NULL if not found
1496 static struct batadv_tt_orig_list_entry
*
1497 batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry
*entry
,
1498 const struct batadv_orig_node
*orig_node
)
1500 struct batadv_tt_orig_list_entry
*tmp_orig_entry
, *orig_entry
= NULL
;
1501 const struct hlist_head
*head
;
1504 head
= &entry
->orig_list
;
1505 hlist_for_each_entry_rcu(tmp_orig_entry
, head
, list
) {
1506 if (tmp_orig_entry
->orig_node
!= orig_node
)
1508 if (!kref_get_unless_zero(&tmp_orig_entry
->refcount
))
1511 orig_entry
= tmp_orig_entry
;
1520 * batadv_tt_global_entry_has_orig - check if a TT global entry is also handled
1521 * by a given originator
1522 * @entry: the TT global entry to check
1523 * @orig_node: the originator to search in the list
1525 * find out if an orig_node is already in the list of a tt_global_entry.
1527 * Return: true if found, false otherwise
1530 batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry
*entry
,
1531 const struct batadv_orig_node
*orig_node
)
1533 struct batadv_tt_orig_list_entry
*orig_entry
;
1536 orig_entry
= batadv_tt_global_orig_entry_find(entry
, orig_node
);
1539 batadv_tt_orig_list_entry_put(orig_entry
);
1546 batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry
*tt_global
,
1547 struct batadv_orig_node
*orig_node
, int ttvn
)
1549 struct batadv_tt_orig_list_entry
*orig_entry
;
1551 orig_entry
= batadv_tt_global_orig_entry_find(tt_global
, orig_node
);
1553 /* refresh the ttvn: the current value could be a bogus one that
1554 * was added during a "temporary client detection"
1556 orig_entry
->ttvn
= ttvn
;
1560 orig_entry
= kmem_cache_zalloc(batadv_tt_orig_cache
, GFP_ATOMIC
);
1564 INIT_HLIST_NODE(&orig_entry
->list
);
1565 kref_get(&orig_node
->refcount
);
1566 batadv_tt_global_size_inc(orig_node
, tt_global
->common
.vid
);
1567 orig_entry
->orig_node
= orig_node
;
1568 orig_entry
->ttvn
= ttvn
;
1569 kref_init(&orig_entry
->refcount
);
1570 kref_get(&orig_entry
->refcount
);
1572 spin_lock_bh(&tt_global
->list_lock
);
1573 hlist_add_head_rcu(&orig_entry
->list
,
1574 &tt_global
->orig_list
);
1575 spin_unlock_bh(&tt_global
->list_lock
);
1576 atomic_inc(&tt_global
->orig_list_count
);
1580 batadv_tt_orig_list_entry_put(orig_entry
);
1584 * batadv_tt_global_add - add a new TT global entry or update an existing one
1585 * @bat_priv: the bat priv with all the soft interface information
1586 * @orig_node: the originator announcing the client
1587 * @tt_addr: the mac address of the non-mesh client
1588 * @vid: VLAN identifier
1589 * @flags: TT flags that have to be set for this non-mesh client
1590 * @ttvn: the tt version number ever announcing this non-mesh client
1592 * Add a new TT global entry for the given originator. If the entry already
1593 * exists add a new reference to the given originator (a global entry can have
1594 * references to multiple originators) and adjust the flags attribute to reflect
1595 * the function argument.
1596 * If a TT local entry exists for this non-mesh client remove it.
1598 * The caller must hold orig_node refcount.
1600 * Return: true if the new entry has been added, false otherwise
1602 static bool batadv_tt_global_add(struct batadv_priv
*bat_priv
,
1603 struct batadv_orig_node
*orig_node
,
1604 const unsigned char *tt_addr
,
1605 unsigned short vid
, u16 flags
, u8 ttvn
)
1607 struct batadv_tt_global_entry
*tt_global_entry
;
1608 struct batadv_tt_local_entry
*tt_local_entry
;
1611 struct batadv_tt_common_entry
*common
;
1614 /* ignore global entries from backbone nodes */
1615 if (batadv_bla_is_backbone_gw_orig(bat_priv
, orig_node
->orig
, vid
))
1618 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, tt_addr
, vid
);
1619 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, tt_addr
, vid
);
1621 /* if the node already has a local client for this entry, it has to wait
1622 * for a roaming advertisement instead of manually messing up the global
1625 if ((flags
& BATADV_TT_CLIENT_TEMP
) && tt_local_entry
&&
1626 !(tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NEW
))
1629 if (!tt_global_entry
) {
1630 tt_global_entry
= kmem_cache_zalloc(batadv_tg_cache
,
1632 if (!tt_global_entry
)
1635 common
= &tt_global_entry
->common
;
1636 ether_addr_copy(common
->addr
, tt_addr
);
1639 common
->flags
= flags
;
1640 tt_global_entry
->roam_at
= 0;
1641 /* node must store current time in case of roaming. This is
1642 * needed to purge this entry out on timeout (if nobody claims
1645 if (flags
& BATADV_TT_CLIENT_ROAM
)
1646 tt_global_entry
->roam_at
= jiffies
;
1647 kref_init(&common
->refcount
);
1648 kref_get(&common
->refcount
);
1649 common
->added_at
= jiffies
;
1651 INIT_HLIST_HEAD(&tt_global_entry
->orig_list
);
1652 atomic_set(&tt_global_entry
->orig_list_count
, 0);
1653 spin_lock_init(&tt_global_entry
->list_lock
);
1655 hash_added
= batadv_hash_add(bat_priv
->tt
.global_hash
,
1657 batadv_choose_tt
, common
,
1658 &common
->hash_entry
);
1660 if (unlikely(hash_added
!= 0)) {
1661 /* remove the reference for the hash */
1662 batadv_tt_global_entry_put(tt_global_entry
);
1666 common
= &tt_global_entry
->common
;
1667 /* If there is already a global entry, we can use this one for
1669 * But if we are trying to add a temporary client then here are
1670 * two options at this point:
1671 * 1) the global client is not a temporary client: the global
1672 * client has to be left as it is, temporary information
1673 * should never override any already known client state
1674 * 2) the global client is a temporary client: purge the
1675 * originator list and add the new one orig_entry
1677 if (flags
& BATADV_TT_CLIENT_TEMP
) {
1678 if (!(common
->flags
& BATADV_TT_CLIENT_TEMP
))
1680 if (batadv_tt_global_entry_has_orig(tt_global_entry
,
1683 batadv_tt_global_del_orig_list(tt_global_entry
);
1684 goto add_orig_entry
;
1687 /* if the client was temporary added before receiving the first
1688 * OGM announcing it, we have to clear the TEMP flag. Also,
1689 * remove the previous temporary orig node and re-add it
1690 * if required. If the orig entry changed, the new one which
1691 * is a non-temporary entry is preferred.
1693 if (common
->flags
& BATADV_TT_CLIENT_TEMP
) {
1694 batadv_tt_global_del_orig_list(tt_global_entry
);
1695 common
->flags
&= ~BATADV_TT_CLIENT_TEMP
;
1698 /* the change can carry possible "attribute" flags like the
1699 * TT_CLIENT_WIFI, therefore they have to be copied in the
1702 common
->flags
|= flags
;
1704 /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only
1705 * one originator left in the list and we previously received a
1706 * delete + roaming change for this originator.
1708 * We should first delete the old originator before adding the
1711 if (common
->flags
& BATADV_TT_CLIENT_ROAM
) {
1712 batadv_tt_global_del_orig_list(tt_global_entry
);
1713 common
->flags
&= ~BATADV_TT_CLIENT_ROAM
;
1714 tt_global_entry
->roam_at
= 0;
1718 /* add the new orig_entry (if needed) or update it */
1719 batadv_tt_global_orig_entry_add(tt_global_entry
, orig_node
, ttvn
);
1721 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1722 "Creating new global tt entry: %pM (vid: %d, via %pM)\n",
1723 common
->addr
, BATADV_PRINT_VID(common
->vid
),
1728 /* Do not remove multicast addresses from the local hash on
1731 if (is_multicast_ether_addr(tt_addr
))
1734 /* remove address from local hash if present */
1735 local_flags
= batadv_tt_local_remove(bat_priv
, tt_addr
, vid
,
1736 "global tt received",
1737 flags
& BATADV_TT_CLIENT_ROAM
);
1738 tt_global_entry
->common
.flags
|= local_flags
& BATADV_TT_CLIENT_WIFI
;
1740 if (!(flags
& BATADV_TT_CLIENT_ROAM
))
1741 /* this is a normal global add. Therefore the client is not in a
1742 * roaming state anymore.
1744 tt_global_entry
->common
.flags
&= ~BATADV_TT_CLIENT_ROAM
;
1747 if (tt_global_entry
)
1748 batadv_tt_global_entry_put(tt_global_entry
);
1750 batadv_tt_local_entry_put(tt_local_entry
);
1755 * batadv_transtable_best_orig - Get best originator list entry from tt entry
1756 * @bat_priv: the bat priv with all the soft interface information
1757 * @tt_global_entry: global translation table entry to be analyzed
1759 * This functon assumes the caller holds rcu_read_lock().
1760 * Return: best originator list entry or NULL on errors.
1762 static struct batadv_tt_orig_list_entry
*
1763 batadv_transtable_best_orig(struct batadv_priv
*bat_priv
,
1764 struct batadv_tt_global_entry
*tt_global_entry
)
1766 struct batadv_neigh_node
*router
, *best_router
= NULL
;
1767 struct batadv_algo_ops
*bao
= bat_priv
->algo_ops
;
1768 struct hlist_head
*head
;
1769 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
= NULL
;
1771 head
= &tt_global_entry
->orig_list
;
1772 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1773 router
= batadv_orig_router_get(orig_entry
->orig_node
,
1779 bao
->neigh
.cmp(router
, BATADV_IF_DEFAULT
, best_router
,
1780 BATADV_IF_DEFAULT
) <= 0) {
1781 batadv_neigh_node_put(router
);
1785 /* release the refcount for the "old" best */
1787 batadv_neigh_node_put(best_router
);
1789 best_entry
= orig_entry
;
1790 best_router
= router
;
1794 batadv_neigh_node_put(best_router
);
1800 * batadv_tt_global_print_entry - print all orig nodes who announce the address
1801 * for this global entry
1802 * @bat_priv: the bat priv with all the soft interface information
1803 * @tt_global_entry: global translation table entry to be printed
1804 * @seq: debugfs table seq_file struct
1806 * This functon assumes the caller holds rcu_read_lock().
1809 batadv_tt_global_print_entry(struct batadv_priv
*bat_priv
,
1810 struct batadv_tt_global_entry
*tt_global_entry
,
1811 struct seq_file
*seq
)
1813 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
;
1814 struct batadv_tt_common_entry
*tt_common_entry
;
1815 struct batadv_orig_node_vlan
*vlan
;
1816 struct hlist_head
*head
;
1820 tt_common_entry
= &tt_global_entry
->common
;
1821 flags
= tt_common_entry
->flags
;
1823 best_entry
= batadv_transtable_best_orig(bat_priv
, tt_global_entry
);
1825 vlan
= batadv_orig_node_vlan_get(best_entry
->orig_node
,
1826 tt_common_entry
->vid
);
1829 " * Cannot retrieve VLAN %d for originator %pM\n",
1830 BATADV_PRINT_VID(tt_common_entry
->vid
),
1831 best_entry
->orig_node
->orig
);
1835 last_ttvn
= atomic_read(&best_entry
->orig_node
->last_ttvn
);
1837 " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1838 '*', tt_global_entry
->common
.addr
,
1839 BATADV_PRINT_VID(tt_global_entry
->common
.vid
),
1840 best_entry
->ttvn
, best_entry
->orig_node
->orig
,
1841 last_ttvn
, vlan
->tt
.crc
,
1842 ((flags
& BATADV_TT_CLIENT_ROAM
) ? 'R' : '.'),
1843 ((flags
& BATADV_TT_CLIENT_WIFI
) ? 'W' : '.'),
1844 ((flags
& BATADV_TT_CLIENT_ISOLA
) ? 'I' : '.'),
1845 ((flags
& BATADV_TT_CLIENT_TEMP
) ? 'T' : '.'));
1847 batadv_orig_node_vlan_put(vlan
);
1851 head
= &tt_global_entry
->orig_list
;
1853 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1854 if (best_entry
== orig_entry
)
1857 vlan
= batadv_orig_node_vlan_get(orig_entry
->orig_node
,
1858 tt_common_entry
->vid
);
1861 " + Cannot retrieve VLAN %d for originator %pM\n",
1862 BATADV_PRINT_VID(tt_common_entry
->vid
),
1863 orig_entry
->orig_node
->orig
);
1867 last_ttvn
= atomic_read(&orig_entry
->orig_node
->last_ttvn
);
1869 " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n",
1870 '+', tt_global_entry
->common
.addr
,
1871 BATADV_PRINT_VID(tt_global_entry
->common
.vid
),
1872 orig_entry
->ttvn
, orig_entry
->orig_node
->orig
,
1873 last_ttvn
, vlan
->tt
.crc
,
1874 ((flags
& BATADV_TT_CLIENT_ROAM
) ? 'R' : '.'),
1875 ((flags
& BATADV_TT_CLIENT_WIFI
) ? 'W' : '.'),
1876 ((flags
& BATADV_TT_CLIENT_ISOLA
) ? 'I' : '.'),
1877 ((flags
& BATADV_TT_CLIENT_TEMP
) ? 'T' : '.'));
1879 batadv_orig_node_vlan_put(vlan
);
1883 int batadv_tt_global_seq_print_text(struct seq_file
*seq
, void *offset
)
1885 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1886 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
1887 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
1888 struct batadv_tt_common_entry
*tt_common_entry
;
1889 struct batadv_tt_global_entry
*tt_global
;
1890 struct batadv_hard_iface
*primary_if
;
1891 struct hlist_head
*head
;
1894 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
1899 "Globally announced TT entries received via the mesh %s\n",
1902 " Client VID (TTVN) Originator (Curr TTVN) (CRC ) Flags\n");
1904 for (i
= 0; i
< hash
->size
; i
++) {
1905 head
= &hash
->table
[i
];
1908 hlist_for_each_entry_rcu(tt_common_entry
,
1910 tt_global
= container_of(tt_common_entry
,
1911 struct batadv_tt_global_entry
,
1913 batadv_tt_global_print_entry(bat_priv
, tt_global
, seq
);
1919 batadv_hardif_put(primary_if
);
1924 * batadv_tt_global_dump_subentry - Dump all TT local entries into a message
1925 * @msg: Netlink message to dump into
1926 * @portid: Port making netlink request
1927 * @seq: Sequence number of netlink message
1928 * @common: tt local & tt global common data
1929 * @orig: Originator node announcing a non-mesh client
1930 * @best: Is the best originator for the TT entry
1932 * Return: Error code, or 0 on success
1935 batadv_tt_global_dump_subentry(struct sk_buff
*msg
, u32 portid
, u32 seq
,
1936 struct batadv_tt_common_entry
*common
,
1937 struct batadv_tt_orig_list_entry
*orig
,
1941 struct batadv_orig_node_vlan
*vlan
;
1945 vlan
= batadv_orig_node_vlan_get(orig
->orig_node
,
1952 batadv_orig_node_vlan_put(vlan
);
1954 hdr
= genlmsg_put(msg
, portid
, seq
, &batadv_netlink_family
,
1956 BATADV_CMD_GET_TRANSTABLE_GLOBAL
);
1960 last_ttvn
= atomic_read(&orig
->orig_node
->last_ttvn
);
1962 if (nla_put(msg
, BATADV_ATTR_TT_ADDRESS
, ETH_ALEN
, common
->addr
) ||
1963 nla_put(msg
, BATADV_ATTR_ORIG_ADDRESS
, ETH_ALEN
,
1964 orig
->orig_node
->orig
) ||
1965 nla_put_u8(msg
, BATADV_ATTR_TT_TTVN
, orig
->ttvn
) ||
1966 nla_put_u8(msg
, BATADV_ATTR_TT_LAST_TTVN
, last_ttvn
) ||
1967 nla_put_u32(msg
, BATADV_ATTR_TT_CRC32
, crc
) ||
1968 nla_put_u16(msg
, BATADV_ATTR_TT_VID
, common
->vid
) ||
1969 nla_put_u32(msg
, BATADV_ATTR_TT_FLAGS
, common
->flags
))
1970 goto nla_put_failure
;
1972 if (best
&& nla_put_flag(msg
, BATADV_ATTR_FLAG_BEST
))
1973 goto nla_put_failure
;
1975 genlmsg_end(msg
, hdr
);
1979 genlmsg_cancel(msg
, hdr
);
1984 * batadv_tt_global_dump_entry - Dump one TT global entry into a message
1985 * @msg: Netlink message to dump into
1986 * @portid: Port making netlink request
1987 * @seq: Sequence number of netlink message
1988 * @bat_priv: The bat priv with all the soft interface information
1989 * @common: tt local & tt global common data
1990 * @sub_s: Number of entries to skip
1992 * This function assumes the caller holds rcu_read_lock().
1994 * Return: Error code, or 0 on success
1997 batadv_tt_global_dump_entry(struct sk_buff
*msg
, u32 portid
, u32 seq
,
1998 struct batadv_priv
*bat_priv
,
1999 struct batadv_tt_common_entry
*common
, int *sub_s
)
2001 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
;
2002 struct batadv_tt_global_entry
*global
;
2003 struct hlist_head
*head
;
2007 global
= container_of(common
, struct batadv_tt_global_entry
, common
);
2008 best_entry
= batadv_transtable_best_orig(bat_priv
, global
);
2009 head
= &global
->orig_list
;
2011 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
2015 best
= (orig_entry
== best_entry
);
2017 if (batadv_tt_global_dump_subentry(msg
, portid
, seq
, common
,
2018 orig_entry
, best
)) {
2029 * batadv_tt_global_dump_bucket - Dump one TT local bucket into a message
2030 * @msg: Netlink message to dump into
2031 * @portid: Port making netlink request
2032 * @seq: Sequence number of netlink message
2033 * @bat_priv: The bat priv with all the soft interface information
2034 * @head: Pointer to the list containing the global tt entries
2035 * @idx_s: Number of entries to skip
2036 * @sub: Number of entries to skip
2038 * Return: Error code, or 0 on success
2041 batadv_tt_global_dump_bucket(struct sk_buff
*msg
, u32 portid
, u32 seq
,
2042 struct batadv_priv
*bat_priv
,
2043 struct hlist_head
*head
, int *idx_s
, int *sub
)
2045 struct batadv_tt_common_entry
*common
;
2049 hlist_for_each_entry_rcu(common
, head
, hash_entry
) {
2053 if (batadv_tt_global_dump_entry(msg
, portid
, seq
, bat_priv
,
2068 * batadv_tt_global_dump - Dump TT global entries into a message
2069 * @msg: Netlink message to dump into
2070 * @cb: Parameters from query
2072 * Return: Error code, or length of message on success
2074 int batadv_tt_global_dump(struct sk_buff
*msg
, struct netlink_callback
*cb
)
2076 struct net
*net
= sock_net(cb
->skb
->sk
);
2077 struct net_device
*soft_iface
;
2078 struct batadv_priv
*bat_priv
;
2079 struct batadv_hard_iface
*primary_if
= NULL
;
2080 struct batadv_hashtable
*hash
;
2081 struct hlist_head
*head
;
2084 int bucket
= cb
->args
[0];
2085 int idx
= cb
->args
[1];
2086 int sub
= cb
->args
[2];
2087 int portid
= NETLINK_CB(cb
->skb
).portid
;
2089 ifindex
= batadv_netlink_get_ifindex(cb
->nlh
, BATADV_ATTR_MESH_IFINDEX
);
2093 soft_iface
= dev_get_by_index(net
, ifindex
);
2094 if (!soft_iface
|| !batadv_softif_is_valid(soft_iface
)) {
2099 bat_priv
= netdev_priv(soft_iface
);
2101 primary_if
= batadv_primary_if_get_selected(bat_priv
);
2102 if (!primary_if
|| primary_if
->if_status
!= BATADV_IF_ACTIVE
) {
2107 hash
= bat_priv
->tt
.global_hash
;
2109 while (bucket
< hash
->size
) {
2110 head
= &hash
->table
[bucket
];
2112 if (batadv_tt_global_dump_bucket(msg
, portid
,
2113 cb
->nlh
->nlmsg_seq
, bat_priv
,
2124 batadv_hardif_put(primary_if
);
2126 dev_put(soft_iface
);
2128 cb
->args
[0] = bucket
;
2136 * _batadv_tt_global_del_orig_entry - remove and free an orig_entry
2137 * @tt_global_entry: the global entry to remove the orig_entry from
2138 * @orig_entry: the orig entry to remove and free
2140 * Remove an orig_entry from its list in the given tt_global_entry and
2141 * free this orig_entry afterwards.
2143 * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is
2147 _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry
*tt_global_entry
,
2148 struct batadv_tt_orig_list_entry
*orig_entry
)
2150 lockdep_assert_held(&tt_global_entry
->list_lock
);
2152 batadv_tt_global_size_dec(orig_entry
->orig_node
,
2153 tt_global_entry
->common
.vid
);
2154 atomic_dec(&tt_global_entry
->orig_list_count
);
2155 /* requires holding tt_global_entry->list_lock and orig_entry->list
2156 * being part of a list
2158 hlist_del_rcu(&orig_entry
->list
);
2159 batadv_tt_orig_list_entry_put(orig_entry
);
2162 /* deletes the orig list of a tt_global_entry */
2164 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry
*tt_global_entry
)
2166 struct hlist_head
*head
;
2167 struct hlist_node
*safe
;
2168 struct batadv_tt_orig_list_entry
*orig_entry
;
2170 spin_lock_bh(&tt_global_entry
->list_lock
);
2171 head
= &tt_global_entry
->orig_list
;
2172 hlist_for_each_entry_safe(orig_entry
, safe
, head
, list
)
2173 _batadv_tt_global_del_orig_entry(tt_global_entry
, orig_entry
);
2174 spin_unlock_bh(&tt_global_entry
->list_lock
);
2178 * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry
2179 * @bat_priv: the bat priv with all the soft interface information
2180 * @tt_global_entry: the global entry to remove the orig_node from
2181 * @orig_node: the originator announcing the client
2182 * @message: message to append to the log on deletion
2184 * Remove the given orig_node and its according orig_entry from the given
2188 batadv_tt_global_del_orig_node(struct batadv_priv
*bat_priv
,
2189 struct batadv_tt_global_entry
*tt_global_entry
,
2190 struct batadv_orig_node
*orig_node
,
2191 const char *message
)
2193 struct hlist_head
*head
;
2194 struct hlist_node
*safe
;
2195 struct batadv_tt_orig_list_entry
*orig_entry
;
2198 spin_lock_bh(&tt_global_entry
->list_lock
);
2199 head
= &tt_global_entry
->orig_list
;
2200 hlist_for_each_entry_safe(orig_entry
, safe
, head
, list
) {
2201 if (orig_entry
->orig_node
== orig_node
) {
2202 vid
= tt_global_entry
->common
.vid
;
2203 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2204 "Deleting %pM from global tt entry %pM (vid: %d): %s\n",
2206 tt_global_entry
->common
.addr
,
2207 BATADV_PRINT_VID(vid
), message
);
2208 _batadv_tt_global_del_orig_entry(tt_global_entry
,
2212 spin_unlock_bh(&tt_global_entry
->list_lock
);
2215 /* If the client is to be deleted, we check if it is the last origantor entry
2216 * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the
2217 * timer, otherwise we simply remove the originator scheduled for deletion.
2220 batadv_tt_global_del_roaming(struct batadv_priv
*bat_priv
,
2221 struct batadv_tt_global_entry
*tt_global_entry
,
2222 struct batadv_orig_node
*orig_node
,
2223 const char *message
)
2225 bool last_entry
= true;
2226 struct hlist_head
*head
;
2227 struct batadv_tt_orig_list_entry
*orig_entry
;
2229 /* no local entry exists, case 1:
2230 * Check if this is the last one or if other entries exist.
2234 head
= &tt_global_entry
->orig_list
;
2235 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
2236 if (orig_entry
->orig_node
!= orig_node
) {
2244 /* its the last one, mark for roaming. */
2245 tt_global_entry
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
2246 tt_global_entry
->roam_at
= jiffies
;
2248 /* there is another entry, we can simply delete this
2249 * one and can still use the other one.
2251 batadv_tt_global_del_orig_node(bat_priv
, tt_global_entry
,
2252 orig_node
, message
);
2256 * batadv_tt_global_del - remove a client from the global table
2257 * @bat_priv: the bat priv with all the soft interface information
2258 * @orig_node: an originator serving this client
2259 * @addr: the mac address of the client
2260 * @vid: VLAN identifier
2261 * @message: a message explaining the reason for deleting the client to print
2262 * for debugging purpose
2263 * @roaming: true if the deletion has been triggered by a roaming event
2265 static void batadv_tt_global_del(struct batadv_priv
*bat_priv
,
2266 struct batadv_orig_node
*orig_node
,
2267 const unsigned char *addr
, unsigned short vid
,
2268 const char *message
, bool roaming
)
2270 struct batadv_tt_global_entry
*tt_global_entry
;
2271 struct batadv_tt_local_entry
*local_entry
= NULL
;
2273 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
2274 if (!tt_global_entry
)
2278 batadv_tt_global_del_orig_node(bat_priv
, tt_global_entry
,
2279 orig_node
, message
);
2281 if (hlist_empty(&tt_global_entry
->orig_list
))
2282 batadv_tt_global_free(bat_priv
, tt_global_entry
,
2288 /* if we are deleting a global entry due to a roam
2289 * event, there are two possibilities:
2290 * 1) the client roamed from node A to node B => if there
2291 * is only one originator left for this client, we mark
2292 * it with BATADV_TT_CLIENT_ROAM, we start a timer and we
2293 * wait for node B to claim it. In case of timeout
2294 * the entry is purged.
2296 * If there are other originators left, we directly delete
2298 * 2) the client roamed to us => we can directly delete
2299 * the global entry, since it is useless now.
2301 local_entry
= batadv_tt_local_hash_find(bat_priv
,
2302 tt_global_entry
->common
.addr
,
2305 /* local entry exists, case 2: client roamed to us. */
2306 batadv_tt_global_del_orig_list(tt_global_entry
);
2307 batadv_tt_global_free(bat_priv
, tt_global_entry
, message
);
2309 /* no local entry exists, case 1: check for roaming */
2310 batadv_tt_global_del_roaming(bat_priv
, tt_global_entry
,
2311 orig_node
, message
);
2314 if (tt_global_entry
)
2315 batadv_tt_global_entry_put(tt_global_entry
);
2317 batadv_tt_local_entry_put(local_entry
);
2321 * batadv_tt_global_del_orig - remove all the TT global entries belonging to the
2322 * given originator matching the provided vid
2323 * @bat_priv: the bat priv with all the soft interface information
2324 * @orig_node: the originator owning the entries to remove
2325 * @match_vid: the VLAN identifier to match. If negative all the entries will be
2327 * @message: debug message to print as "reason"
2329 void batadv_tt_global_del_orig(struct batadv_priv
*bat_priv
,
2330 struct batadv_orig_node
*orig_node
,
2332 const char *message
)
2334 struct batadv_tt_global_entry
*tt_global
;
2335 struct batadv_tt_common_entry
*tt_common_entry
;
2337 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
2338 struct hlist_node
*safe
;
2339 struct hlist_head
*head
;
2340 spinlock_t
*list_lock
; /* protects write access to the hash lists */
2346 for (i
= 0; i
< hash
->size
; i
++) {
2347 head
= &hash
->table
[i
];
2348 list_lock
= &hash
->list_locks
[i
];
2350 spin_lock_bh(list_lock
);
2351 hlist_for_each_entry_safe(tt_common_entry
, safe
,
2353 /* remove only matching entries */
2354 if (match_vid
>= 0 && tt_common_entry
->vid
!= match_vid
)
2357 tt_global
= container_of(tt_common_entry
,
2358 struct batadv_tt_global_entry
,
2361 batadv_tt_global_del_orig_node(bat_priv
, tt_global
,
2362 orig_node
, message
);
2364 if (hlist_empty(&tt_global
->orig_list
)) {
2365 vid
= tt_global
->common
.vid
;
2366 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2367 "Deleting global tt entry %pM (vid: %d): %s\n",
2368 tt_global
->common
.addr
,
2369 BATADV_PRINT_VID(vid
), message
);
2370 hlist_del_rcu(&tt_common_entry
->hash_entry
);
2371 batadv_tt_global_entry_put(tt_global
);
2374 spin_unlock_bh(list_lock
);
2376 clear_bit(BATADV_ORIG_CAPA_HAS_TT
, &orig_node
->capa_initialized
);
2379 static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry
*tt_global
,
2383 unsigned long roam_timeout
= BATADV_TT_CLIENT_ROAM_TIMEOUT
;
2384 unsigned long temp_timeout
= BATADV_TT_CLIENT_TEMP_TIMEOUT
;
2386 if ((tt_global
->common
.flags
& BATADV_TT_CLIENT_ROAM
) &&
2387 batadv_has_timed_out(tt_global
->roam_at
, roam_timeout
)) {
2389 *msg
= "Roaming timeout\n";
2392 if ((tt_global
->common
.flags
& BATADV_TT_CLIENT_TEMP
) &&
2393 batadv_has_timed_out(tt_global
->common
.added_at
, temp_timeout
)) {
2395 *msg
= "Temporary client timeout\n";
2401 static void batadv_tt_global_purge(struct batadv_priv
*bat_priv
)
2403 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
2404 struct hlist_head
*head
;
2405 struct hlist_node
*node_tmp
;
2406 spinlock_t
*list_lock
; /* protects write access to the hash lists */
2409 struct batadv_tt_common_entry
*tt_common
;
2410 struct batadv_tt_global_entry
*tt_global
;
2412 for (i
= 0; i
< hash
->size
; i
++) {
2413 head
= &hash
->table
[i
];
2414 list_lock
= &hash
->list_locks
[i
];
2416 spin_lock_bh(list_lock
);
2417 hlist_for_each_entry_safe(tt_common
, node_tmp
, head
,
2419 tt_global
= container_of(tt_common
,
2420 struct batadv_tt_global_entry
,
2423 if (!batadv_tt_global_to_purge(tt_global
, &msg
))
2426 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2427 "Deleting global tt entry %pM (vid: %d): %s\n",
2428 tt_global
->common
.addr
,
2429 BATADV_PRINT_VID(tt_global
->common
.vid
),
2432 hlist_del_rcu(&tt_common
->hash_entry
);
2434 batadv_tt_global_entry_put(tt_global
);
2436 spin_unlock_bh(list_lock
);
2440 static void batadv_tt_global_table_free(struct batadv_priv
*bat_priv
)
2442 struct batadv_hashtable
*hash
;
2443 spinlock_t
*list_lock
; /* protects write access to the hash lists */
2444 struct batadv_tt_common_entry
*tt_common_entry
;
2445 struct batadv_tt_global_entry
*tt_global
;
2446 struct hlist_node
*node_tmp
;
2447 struct hlist_head
*head
;
2450 if (!bat_priv
->tt
.global_hash
)
2453 hash
= bat_priv
->tt
.global_hash
;
2455 for (i
= 0; i
< hash
->size
; i
++) {
2456 head
= &hash
->table
[i
];
2457 list_lock
= &hash
->list_locks
[i
];
2459 spin_lock_bh(list_lock
);
2460 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
,
2462 hlist_del_rcu(&tt_common_entry
->hash_entry
);
2463 tt_global
= container_of(tt_common_entry
,
2464 struct batadv_tt_global_entry
,
2466 batadv_tt_global_entry_put(tt_global
);
2468 spin_unlock_bh(list_lock
);
2471 batadv_hash_destroy(hash
);
2473 bat_priv
->tt
.global_hash
= NULL
;
2477 _batadv_is_ap_isolated(struct batadv_tt_local_entry
*tt_local_entry
,
2478 struct batadv_tt_global_entry
*tt_global_entry
)
2482 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_WIFI
&&
2483 tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_WIFI
)
2486 /* check if the two clients are marked as isolated */
2487 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ISOLA
&&
2488 tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_ISOLA
)
2495 * batadv_transtable_search - get the mesh destination for a given client
2496 * @bat_priv: the bat priv with all the soft interface information
2497 * @src: mac address of the source client
2498 * @addr: mac address of the destination client
2499 * @vid: VLAN identifier
2501 * Return: a pointer to the originator that was selected as destination in the
2502 * mesh for contacting the client 'addr', NULL otherwise.
2503 * In case of multiple originators serving the same client, the function returns
2504 * the best one (best in terms of metric towards the destination node).
2506 * If the two clients are AP isolated the function returns NULL.
2508 struct batadv_orig_node
*batadv_transtable_search(struct batadv_priv
*bat_priv
,
2513 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
2514 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
2515 struct batadv_orig_node
*orig_node
= NULL
;
2516 struct batadv_tt_orig_list_entry
*best_entry
;
2518 if (src
&& batadv_vlan_ap_isola_get(bat_priv
, vid
)) {
2519 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, src
, vid
);
2520 if (!tt_local_entry
||
2521 (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
))
2525 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
2526 if (!tt_global_entry
)
2529 /* check whether the clients should not communicate due to AP
2532 if (tt_local_entry
&&
2533 _batadv_is_ap_isolated(tt_local_entry
, tt_global_entry
))
2537 best_entry
= batadv_transtable_best_orig(bat_priv
, tt_global_entry
);
2538 /* found anything? */
2540 orig_node
= best_entry
->orig_node
;
2541 if (orig_node
&& !kref_get_unless_zero(&orig_node
->refcount
))
2546 if (tt_global_entry
)
2547 batadv_tt_global_entry_put(tt_global_entry
);
2549 batadv_tt_local_entry_put(tt_local_entry
);
2555 * batadv_tt_global_crc - calculates the checksum of the local table belonging
2556 * to the given orig_node
2557 * @bat_priv: the bat priv with all the soft interface information
2558 * @orig_node: originator for which the CRC should be computed
2559 * @vid: VLAN identifier for which the CRC32 has to be computed
2561 * This function computes the checksum for the global table corresponding to a
2562 * specific originator. In particular, the checksum is computed as follows: For
2563 * each client connected to the originator the CRC32C of the MAC address and the
2564 * VID is computed and then all the CRC32Cs of the various clients are xor'ed
2567 * The idea behind is that CRC32C should be used as much as possible in order to
2568 * produce a unique hash of the table, but since the order which is used to feed
2569 * the CRC32C function affects the result and since every node in the network
2570 * probably sorts the clients differently, the hash function cannot be directly
2571 * computed over the entire table. Hence the CRC32C is used only on
2572 * the single client entry, while all the results are then xor'ed together
2573 * because the XOR operation can combine them all while trying to reduce the
2574 * noise as much as possible.
2576 * Return: the checksum of the global table of a given originator.
2578 static u32
batadv_tt_global_crc(struct batadv_priv
*bat_priv
,
2579 struct batadv_orig_node
*orig_node
,
2582 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
2583 struct batadv_tt_common_entry
*tt_common
;
2584 struct batadv_tt_global_entry
*tt_global
;
2585 struct hlist_head
*head
;
2586 u32 i
, crc_tmp
, crc
= 0;
2590 for (i
= 0; i
< hash
->size
; i
++) {
2591 head
= &hash
->table
[i
];
2594 hlist_for_each_entry_rcu(tt_common
, head
, hash_entry
) {
2595 tt_global
= container_of(tt_common
,
2596 struct batadv_tt_global_entry
,
2598 /* compute the CRC only for entries belonging to the
2599 * VLAN identified by the vid passed as parameter
2601 if (tt_common
->vid
!= vid
)
2604 /* Roaming clients are in the global table for
2605 * consistency only. They don't have to be
2606 * taken into account while computing the
2609 if (tt_common
->flags
& BATADV_TT_CLIENT_ROAM
)
2611 /* Temporary clients have not been announced yet, so
2612 * they have to be skipped while computing the global
2615 if (tt_common
->flags
& BATADV_TT_CLIENT_TEMP
)
2618 /* find out if this global entry is announced by this
2621 if (!batadv_tt_global_entry_has_orig(tt_global
,
2625 /* use network order to read the VID: this ensures that
2626 * every node reads the bytes in the same order.
2628 tmp_vid
= htons(tt_common
->vid
);
2629 crc_tmp
= crc32c(0, &tmp_vid
, sizeof(tmp_vid
));
2631 /* compute the CRC on flags that have to be kept in sync
2634 flags
= tt_common
->flags
& BATADV_TT_SYNC_MASK
;
2635 crc_tmp
= crc32c(crc_tmp
, &flags
, sizeof(flags
));
2637 crc
^= crc32c(crc_tmp
, tt_common
->addr
, ETH_ALEN
);
2646 * batadv_tt_local_crc - calculates the checksum of the local table
2647 * @bat_priv: the bat priv with all the soft interface information
2648 * @vid: VLAN identifier for which the CRC32 has to be computed
2650 * For details about the computation, please refer to the documentation for
2651 * batadv_tt_global_crc().
2653 * Return: the checksum of the local table
2655 static u32
batadv_tt_local_crc(struct batadv_priv
*bat_priv
,
2658 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
2659 struct batadv_tt_common_entry
*tt_common
;
2660 struct hlist_head
*head
;
2661 u32 i
, crc_tmp
, crc
= 0;
2665 for (i
= 0; i
< hash
->size
; i
++) {
2666 head
= &hash
->table
[i
];
2669 hlist_for_each_entry_rcu(tt_common
, head
, hash_entry
) {
2670 /* compute the CRC only for entries belonging to the
2671 * VLAN identified by vid
2673 if (tt_common
->vid
!= vid
)
2676 /* not yet committed clients have not to be taken into
2677 * account while computing the CRC
2679 if (tt_common
->flags
& BATADV_TT_CLIENT_NEW
)
2682 /* use network order to read the VID: this ensures that
2683 * every node reads the bytes in the same order.
2685 tmp_vid
= htons(tt_common
->vid
);
2686 crc_tmp
= crc32c(0, &tmp_vid
, sizeof(tmp_vid
));
2688 /* compute the CRC on flags that have to be kept in sync
2691 flags
= tt_common
->flags
& BATADV_TT_SYNC_MASK
;
2692 crc_tmp
= crc32c(crc_tmp
, &flags
, sizeof(flags
));
2694 crc
^= crc32c(crc_tmp
, tt_common
->addr
, ETH_ALEN
);
2703 * batadv_tt_req_node_release - free tt_req node entry
2704 * @ref: kref pointer of the tt req_node entry
2706 static void batadv_tt_req_node_release(struct kref
*ref
)
2708 struct batadv_tt_req_node
*tt_req_node
;
2710 tt_req_node
= container_of(ref
, struct batadv_tt_req_node
, refcount
);
2712 kmem_cache_free(batadv_tt_req_cache
, tt_req_node
);
2716 * batadv_tt_req_node_put - decrement the tt_req_node refcounter and
2717 * possibly release it
2718 * @tt_req_node: tt_req_node to be free'd
2720 static void batadv_tt_req_node_put(struct batadv_tt_req_node
*tt_req_node
)
2722 kref_put(&tt_req_node
->refcount
, batadv_tt_req_node_release
);
2725 static void batadv_tt_req_list_free(struct batadv_priv
*bat_priv
)
2727 struct batadv_tt_req_node
*node
;
2728 struct hlist_node
*safe
;
2730 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2732 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
2733 hlist_del_init(&node
->list
);
2734 batadv_tt_req_node_put(node
);
2737 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2740 static void batadv_tt_save_orig_buffer(struct batadv_priv
*bat_priv
,
2741 struct batadv_orig_node
*orig_node
,
2742 const void *tt_buff
,
2745 /* Replace the old buffer only if I received something in the
2746 * last OGM (the OGM could carry no changes)
2748 spin_lock_bh(&orig_node
->tt_buff_lock
);
2749 if (tt_buff_len
> 0) {
2750 kfree(orig_node
->tt_buff
);
2751 orig_node
->tt_buff_len
= 0;
2752 orig_node
->tt_buff
= kmalloc(tt_buff_len
, GFP_ATOMIC
);
2753 if (orig_node
->tt_buff
) {
2754 memcpy(orig_node
->tt_buff
, tt_buff
, tt_buff_len
);
2755 orig_node
->tt_buff_len
= tt_buff_len
;
2758 spin_unlock_bh(&orig_node
->tt_buff_lock
);
2761 static void batadv_tt_req_purge(struct batadv_priv
*bat_priv
)
2763 struct batadv_tt_req_node
*node
;
2764 struct hlist_node
*safe
;
2766 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2767 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
2768 if (batadv_has_timed_out(node
->issued_at
,
2769 BATADV_TT_REQUEST_TIMEOUT
)) {
2770 hlist_del_init(&node
->list
);
2771 batadv_tt_req_node_put(node
);
2774 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2778 * batadv_tt_req_node_new - search and possibly create a tt_req_node object
2779 * @bat_priv: the bat priv with all the soft interface information
2780 * @orig_node: orig node this request is being issued for
2782 * Return: the pointer to the new tt_req_node struct if no request
2783 * has already been issued for this orig_node, NULL otherwise.
2785 static struct batadv_tt_req_node
*
2786 batadv_tt_req_node_new(struct batadv_priv
*bat_priv
,
2787 struct batadv_orig_node
*orig_node
)
2789 struct batadv_tt_req_node
*tt_req_node_tmp
, *tt_req_node
= NULL
;
2791 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2792 hlist_for_each_entry(tt_req_node_tmp
, &bat_priv
->tt
.req_list
, list
) {
2793 if (batadv_compare_eth(tt_req_node_tmp
, orig_node
) &&
2794 !batadv_has_timed_out(tt_req_node_tmp
->issued_at
,
2795 BATADV_TT_REQUEST_TIMEOUT
))
2799 tt_req_node
= kmem_cache_alloc(batadv_tt_req_cache
, GFP_ATOMIC
);
2803 kref_init(&tt_req_node
->refcount
);
2804 ether_addr_copy(tt_req_node
->addr
, orig_node
->orig
);
2805 tt_req_node
->issued_at
= jiffies
;
2807 kref_get(&tt_req_node
->refcount
);
2808 hlist_add_head(&tt_req_node
->list
, &bat_priv
->tt
.req_list
);
2810 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2815 * batadv_tt_local_valid - verify that given tt entry is a valid one
2816 * @entry_ptr: to be checked local tt entry
2817 * @data_ptr: not used but definition required to satisfy the callback prototype
2819 * Return: true if the entry is a valid, false otherwise.
2821 static bool batadv_tt_local_valid(const void *entry_ptr
, const void *data_ptr
)
2823 const struct batadv_tt_common_entry
*tt_common_entry
= entry_ptr
;
2825 if (tt_common_entry
->flags
& BATADV_TT_CLIENT_NEW
)
2830 static bool batadv_tt_global_valid(const void *entry_ptr
,
2831 const void *data_ptr
)
2833 const struct batadv_tt_common_entry
*tt_common_entry
= entry_ptr
;
2834 const struct batadv_tt_global_entry
*tt_global_entry
;
2835 const struct batadv_orig_node
*orig_node
= data_ptr
;
2837 if (tt_common_entry
->flags
& BATADV_TT_CLIENT_ROAM
||
2838 tt_common_entry
->flags
& BATADV_TT_CLIENT_TEMP
)
2841 tt_global_entry
= container_of(tt_common_entry
,
2842 struct batadv_tt_global_entry
,
2845 return batadv_tt_global_entry_has_orig(tt_global_entry
, orig_node
);
2849 * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the
2851 * @bat_priv: the bat priv with all the soft interface information
2852 * @hash: hash table containing the tt entries
2853 * @tt_len: expected tvlv tt data buffer length in number of bytes
2854 * @tvlv_buff: pointer to the buffer to fill with the TT data
2855 * @valid_cb: function to filter tt change entries
2856 * @cb_data: data passed to the filter function as argument
2858 static void batadv_tt_tvlv_generate(struct batadv_priv
*bat_priv
,
2859 struct batadv_hashtable
*hash
,
2860 void *tvlv_buff
, u16 tt_len
,
2861 bool (*valid_cb
)(const void *,
2865 struct batadv_tt_common_entry
*tt_common_entry
;
2866 struct batadv_tvlv_tt_change
*tt_change
;
2867 struct hlist_head
*head
;
2868 u16 tt_tot
, tt_num_entries
= 0;
2871 tt_tot
= batadv_tt_entries(tt_len
);
2872 tt_change
= (struct batadv_tvlv_tt_change
*)tvlv_buff
;
2875 for (i
= 0; i
< hash
->size
; i
++) {
2876 head
= &hash
->table
[i
];
2878 hlist_for_each_entry_rcu(tt_common_entry
,
2880 if (tt_tot
== tt_num_entries
)
2883 if ((valid_cb
) && (!valid_cb(tt_common_entry
, cb_data
)))
2886 ether_addr_copy(tt_change
->addr
, tt_common_entry
->addr
);
2887 tt_change
->flags
= tt_common_entry
->flags
;
2888 tt_change
->vid
= htons(tt_common_entry
->vid
);
2889 memset(tt_change
->reserved
, 0,
2890 sizeof(tt_change
->reserved
));
2900 * batadv_tt_global_check_crc - check if all the CRCs are correct
2901 * @orig_node: originator for which the CRCs have to be checked
2902 * @tt_vlan: pointer to the first tvlv VLAN entry
2903 * @num_vlan: number of tvlv VLAN entries
2905 * Return: true if all the received CRCs match the locally stored ones, false
2908 static bool batadv_tt_global_check_crc(struct batadv_orig_node
*orig_node
,
2909 struct batadv_tvlv_tt_vlan_data
*tt_vlan
,
2912 struct batadv_tvlv_tt_vlan_data
*tt_vlan_tmp
;
2913 struct batadv_orig_node_vlan
*vlan
;
2914 int i
, orig_num_vlan
;
2917 /* check if each received CRC matches the locally stored one */
2918 for (i
= 0; i
< num_vlan
; i
++) {
2919 tt_vlan_tmp
= tt_vlan
+ i
;
2921 /* if orig_node is a backbone node for this VLAN, don't check
2922 * the CRC as we ignore all the global entries over it
2924 if (batadv_bla_is_backbone_gw_orig(orig_node
->bat_priv
,
2926 ntohs(tt_vlan_tmp
->vid
)))
2929 vlan
= batadv_orig_node_vlan_get(orig_node
,
2930 ntohs(tt_vlan_tmp
->vid
));
2935 batadv_orig_node_vlan_put(vlan
);
2937 if (crc
!= ntohl(tt_vlan_tmp
->crc
))
2941 /* check if any excess VLANs exist locally for the originator
2942 * which are not mentioned in the TVLV from the originator.
2946 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
)
2950 if (orig_num_vlan
> num_vlan
)
2957 * batadv_tt_local_update_crc - update all the local CRCs
2958 * @bat_priv: the bat priv with all the soft interface information
2960 static void batadv_tt_local_update_crc(struct batadv_priv
*bat_priv
)
2962 struct batadv_softif_vlan
*vlan
;
2964 /* recompute the global CRC for each VLAN */
2966 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
2967 vlan
->tt
.crc
= batadv_tt_local_crc(bat_priv
, vlan
->vid
);
2973 * batadv_tt_global_update_crc - update all the global CRCs for this orig_node
2974 * @bat_priv: the bat priv with all the soft interface information
2975 * @orig_node: the orig_node for which the CRCs have to be updated
2977 static void batadv_tt_global_update_crc(struct batadv_priv
*bat_priv
,
2978 struct batadv_orig_node
*orig_node
)
2980 struct batadv_orig_node_vlan
*vlan
;
2983 /* recompute the global CRC for each VLAN */
2985 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
) {
2986 /* if orig_node is a backbone node for this VLAN, don't compute
2987 * the CRC as we ignore all the global entries over it
2989 if (batadv_bla_is_backbone_gw_orig(bat_priv
, orig_node
->orig
,
2993 crc
= batadv_tt_global_crc(bat_priv
, orig_node
, vlan
->vid
);
3000 * batadv_send_tt_request - send a TT Request message to a given node
3001 * @bat_priv: the bat priv with all the soft interface information
3002 * @dst_orig_node: the destination of the message
3003 * @ttvn: the version number that the source of the message is looking for
3004 * @tt_vlan: pointer to the first tvlv VLAN object to request
3005 * @num_vlan: number of tvlv VLAN entries
3006 * @full_table: ask for the entire translation table if true, while only for the
3007 * last TT diff otherwise
3009 * Return: true if the TT Request was sent, false otherwise
3011 static bool batadv_send_tt_request(struct batadv_priv
*bat_priv
,
3012 struct batadv_orig_node
*dst_orig_node
,
3014 struct batadv_tvlv_tt_vlan_data
*tt_vlan
,
3015 u16 num_vlan
, bool full_table
)
3017 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
3018 struct batadv_tt_req_node
*tt_req_node
= NULL
;
3019 struct batadv_tvlv_tt_vlan_data
*tt_vlan_req
;
3020 struct batadv_hard_iface
*primary_if
;
3024 primary_if
= batadv_primary_if_get_selected(bat_priv
);
3028 /* The new tt_req will be issued only if I'm not waiting for a
3029 * reply from the same orig_node yet
3031 tt_req_node
= batadv_tt_req_node_new(bat_priv
, dst_orig_node
);
3035 size
= sizeof(*tvlv_tt_data
) + sizeof(*tt_vlan_req
) * num_vlan
;
3036 tvlv_tt_data
= kzalloc(size
, GFP_ATOMIC
);
3040 tvlv_tt_data
->flags
= BATADV_TT_REQUEST
;
3041 tvlv_tt_data
->ttvn
= ttvn
;
3042 tvlv_tt_data
->num_vlan
= htons(num_vlan
);
3044 /* send all the CRCs within the request. This is needed by intermediate
3045 * nodes to ensure they have the correct table before replying
3047 tt_vlan_req
= (struct batadv_tvlv_tt_vlan_data
*)(tvlv_tt_data
+ 1);
3048 for (i
= 0; i
< num_vlan
; i
++) {
3049 tt_vlan_req
->vid
= tt_vlan
->vid
;
3050 tt_vlan_req
->crc
= tt_vlan
->crc
;
3057 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
3059 batadv_dbg(BATADV_DBG_TT
, bat_priv
, "Sending TT_REQUEST to %pM [%c]\n",
3060 dst_orig_node
->orig
, full_table
? 'F' : '.');
3062 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_REQUEST_TX
);
3063 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
3064 dst_orig_node
->orig
, BATADV_TVLV_TT
, 1,
3065 tvlv_tt_data
, size
);
3070 batadv_hardif_put(primary_if
);
3072 if (ret
&& tt_req_node
) {
3073 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
3074 if (!hlist_unhashed(&tt_req_node
->list
)) {
3075 hlist_del_init(&tt_req_node
->list
);
3076 batadv_tt_req_node_put(tt_req_node
);
3078 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
3082 batadv_tt_req_node_put(tt_req_node
);
3084 kfree(tvlv_tt_data
);
3089 * batadv_send_other_tt_response - send reply to tt request concerning another
3090 * node's translation table
3091 * @bat_priv: the bat priv with all the soft interface information
3092 * @tt_data: tt data containing the tt request information
3093 * @req_src: mac address of tt request sender
3094 * @req_dst: mac address of tt request recipient
3096 * Return: true if tt request reply was sent, false otherwise.
3098 static bool batadv_send_other_tt_response(struct batadv_priv
*bat_priv
,
3099 struct batadv_tvlv_tt_data
*tt_data
,
3100 u8
*req_src
, u8
*req_dst
)
3102 struct batadv_orig_node
*req_dst_orig_node
;
3103 struct batadv_orig_node
*res_dst_orig_node
= NULL
;
3104 struct batadv_tvlv_tt_change
*tt_change
;
3105 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
3106 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
3107 bool ret
= false, full_table
;
3108 u8 orig_ttvn
, req_ttvn
;
3112 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3113 "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n",
3114 req_src
, tt_data
->ttvn
, req_dst
,
3115 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
3117 /* Let's get the orig node of the REAL destination */
3118 req_dst_orig_node
= batadv_orig_hash_find(bat_priv
, req_dst
);
3119 if (!req_dst_orig_node
)
3122 res_dst_orig_node
= batadv_orig_hash_find(bat_priv
, req_src
);
3123 if (!res_dst_orig_node
)
3126 orig_ttvn
= (u8
)atomic_read(&req_dst_orig_node
->last_ttvn
);
3127 req_ttvn
= tt_data
->ttvn
;
3129 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(tt_data
+ 1);
3130 /* this node doesn't have the requested data */
3131 if (orig_ttvn
!= req_ttvn
||
3132 !batadv_tt_global_check_crc(req_dst_orig_node
, tt_vlan
,
3133 ntohs(tt_data
->num_vlan
)))
3136 /* If the full table has been explicitly requested */
3137 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
||
3138 !req_dst_orig_node
->tt_buff
)
3143 /* TT fragmentation hasn't been implemented yet, so send as many
3144 * TT entries fit a single packet as possible only
3147 spin_lock_bh(&req_dst_orig_node
->tt_buff_lock
);
3148 tt_len
= req_dst_orig_node
->tt_buff_len
;
3150 tvlv_len
= batadv_tt_prepare_tvlv_global_data(req_dst_orig_node
,
3157 /* Copy the last orig_node's OGM buffer */
3158 memcpy(tt_change
, req_dst_orig_node
->tt_buff
,
3159 req_dst_orig_node
->tt_buff_len
);
3160 spin_unlock_bh(&req_dst_orig_node
->tt_buff_lock
);
3162 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3163 * in the initial part
3166 tvlv_len
= batadv_tt_prepare_tvlv_global_data(req_dst_orig_node
,
3173 /* fill the rest of the tvlv with the real TT entries */
3174 batadv_tt_tvlv_generate(bat_priv
, bat_priv
->tt
.global_hash
,
3176 batadv_tt_global_valid
,
3180 /* Don't send the response, if larger than fragmented packet. */
3181 tt_len
= sizeof(struct batadv_unicast_tvlv_packet
) + tvlv_len
;
3182 if (tt_len
> atomic_read(&bat_priv
->packet_size_max
)) {
3183 net_ratelimited_function(batadv_info
, bat_priv
->soft_iface
,
3184 "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n",
3185 res_dst_orig_node
->orig
);
3189 tvlv_tt_data
->flags
= BATADV_TT_RESPONSE
;
3190 tvlv_tt_data
->ttvn
= req_ttvn
;
3193 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
3195 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3196 "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n",
3197 res_dst_orig_node
->orig
, req_dst_orig_node
->orig
,
3198 full_table
? 'F' : '.', req_ttvn
);
3200 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_TX
);
3202 batadv_tvlv_unicast_send(bat_priv
, req_dst_orig_node
->orig
,
3203 req_src
, BATADV_TVLV_TT
, 1, tvlv_tt_data
,
3210 spin_unlock_bh(&req_dst_orig_node
->tt_buff_lock
);
3213 if (res_dst_orig_node
)
3214 batadv_orig_node_put(res_dst_orig_node
);
3215 if (req_dst_orig_node
)
3216 batadv_orig_node_put(req_dst_orig_node
);
3217 kfree(tvlv_tt_data
);
3222 * batadv_send_my_tt_response - send reply to tt request concerning this node's
3224 * @bat_priv: the bat priv with all the soft interface information
3225 * @tt_data: tt data containing the tt request information
3226 * @req_src: mac address of tt request sender
3228 * Return: true if tt request reply was sent, false otherwise.
3230 static bool batadv_send_my_tt_response(struct batadv_priv
*bat_priv
,
3231 struct batadv_tvlv_tt_data
*tt_data
,
3234 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
3235 struct batadv_hard_iface
*primary_if
= NULL
;
3236 struct batadv_tvlv_tt_change
*tt_change
;
3237 struct batadv_orig_node
*orig_node
;
3238 u8 my_ttvn
, req_ttvn
;
3243 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3244 "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
3245 req_src
, tt_data
->ttvn
,
3246 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
3248 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
3250 my_ttvn
= (u8
)atomic_read(&bat_priv
->tt
.vn
);
3251 req_ttvn
= tt_data
->ttvn
;
3253 orig_node
= batadv_orig_hash_find(bat_priv
, req_src
);
3257 primary_if
= batadv_primary_if_get_selected(bat_priv
);
3261 /* If the full table has been explicitly requested or the gap
3262 * is too big send the whole local translation table
3264 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
|| my_ttvn
!= req_ttvn
||
3265 !bat_priv
->tt
.last_changeset
)
3270 /* TT fragmentation hasn't been implemented yet, so send as many
3271 * TT entries fit a single packet as possible only
3274 spin_lock_bh(&bat_priv
->tt
.last_changeset_lock
);
3276 tt_len
= bat_priv
->tt
.last_changeset_len
;
3277 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
,
3284 /* Copy the last orig_node's OGM buffer */
3285 memcpy(tt_change
, bat_priv
->tt
.last_changeset
,
3286 bat_priv
->tt
.last_changeset_len
);
3287 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
3289 req_ttvn
= (u8
)atomic_read(&bat_priv
->tt
.vn
);
3291 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3292 * in the initial part
3295 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
,
3302 /* fill the rest of the tvlv with the real TT entries */
3303 batadv_tt_tvlv_generate(bat_priv
, bat_priv
->tt
.local_hash
,
3305 batadv_tt_local_valid
, NULL
);
3308 tvlv_tt_data
->flags
= BATADV_TT_RESPONSE
;
3309 tvlv_tt_data
->ttvn
= req_ttvn
;
3312 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
3314 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3315 "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n",
3316 orig_node
->orig
, full_table
? 'F' : '.', req_ttvn
);
3318 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_TX
);
3320 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
3321 req_src
, BATADV_TVLV_TT
, 1, tvlv_tt_data
,
3327 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
3329 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
3331 batadv_orig_node_put(orig_node
);
3333 batadv_hardif_put(primary_if
);
3334 kfree(tvlv_tt_data
);
3335 /* The packet was for this host, so it doesn't need to be re-routed */
3340 * batadv_send_tt_response - send reply to tt request
3341 * @bat_priv: the bat priv with all the soft interface information
3342 * @tt_data: tt data containing the tt request information
3343 * @req_src: mac address of tt request sender
3344 * @req_dst: mac address of tt request recipient
3346 * Return: true if tt request reply was sent, false otherwise.
3348 static bool batadv_send_tt_response(struct batadv_priv
*bat_priv
,
3349 struct batadv_tvlv_tt_data
*tt_data
,
3350 u8
*req_src
, u8
*req_dst
)
3352 if (batadv_is_my_mac(bat_priv
, req_dst
))
3353 return batadv_send_my_tt_response(bat_priv
, tt_data
, req_src
);
3354 return batadv_send_other_tt_response(bat_priv
, tt_data
, req_src
,
3358 static void _batadv_tt_update_changes(struct batadv_priv
*bat_priv
,
3359 struct batadv_orig_node
*orig_node
,
3360 struct batadv_tvlv_tt_change
*tt_change
,
3361 u16 tt_num_changes
, u8 ttvn
)
3366 for (i
= 0; i
< tt_num_changes
; i
++) {
3367 if ((tt_change
+ i
)->flags
& BATADV_TT_CLIENT_DEL
) {
3368 roams
= (tt_change
+ i
)->flags
& BATADV_TT_CLIENT_ROAM
;
3369 batadv_tt_global_del(bat_priv
, orig_node
,
3370 (tt_change
+ i
)->addr
,
3371 ntohs((tt_change
+ i
)->vid
),
3372 "tt removed by changes",
3375 if (!batadv_tt_global_add(bat_priv
, orig_node
,
3376 (tt_change
+ i
)->addr
,
3377 ntohs((tt_change
+ i
)->vid
),
3378 (tt_change
+ i
)->flags
, ttvn
))
3379 /* In case of problem while storing a
3380 * global_entry, we stop the updating
3381 * procedure without committing the
3382 * ttvn change. This will avoid to send
3383 * corrupted data on tt_request
3388 set_bit(BATADV_ORIG_CAPA_HAS_TT
, &orig_node
->capa_initialized
);
3391 static void batadv_tt_fill_gtable(struct batadv_priv
*bat_priv
,
3392 struct batadv_tvlv_tt_change
*tt_change
,
3393 u8 ttvn
, u8
*resp_src
,
3396 struct batadv_orig_node
*orig_node
;
3398 orig_node
= batadv_orig_hash_find(bat_priv
, resp_src
);
3402 /* Purge the old table first.. */
3403 batadv_tt_global_del_orig(bat_priv
, orig_node
, -1,
3404 "Received full table");
3406 _batadv_tt_update_changes(bat_priv
, orig_node
, tt_change
, num_entries
,
3409 spin_lock_bh(&orig_node
->tt_buff_lock
);
3410 kfree(orig_node
->tt_buff
);
3411 orig_node
->tt_buff_len
= 0;
3412 orig_node
->tt_buff
= NULL
;
3413 spin_unlock_bh(&orig_node
->tt_buff_lock
);
3415 atomic_set(&orig_node
->last_ttvn
, ttvn
);
3419 batadv_orig_node_put(orig_node
);
3422 static void batadv_tt_update_changes(struct batadv_priv
*bat_priv
,
3423 struct batadv_orig_node
*orig_node
,
3424 u16 tt_num_changes
, u8 ttvn
,
3425 struct batadv_tvlv_tt_change
*tt_change
)
3427 _batadv_tt_update_changes(bat_priv
, orig_node
, tt_change
,
3428 tt_num_changes
, ttvn
);
3430 batadv_tt_save_orig_buffer(bat_priv
, orig_node
, tt_change
,
3431 batadv_tt_len(tt_num_changes
));
3432 atomic_set(&orig_node
->last_ttvn
, ttvn
);
3436 * batadv_is_my_client - check if a client is served by the local node
3437 * @bat_priv: the bat priv with all the soft interface information
3438 * @addr: the mac address of the client to check
3439 * @vid: VLAN identifier
3441 * Return: true if the client is served by this node, false otherwise.
3443 bool batadv_is_my_client(struct batadv_priv
*bat_priv
, const u8
*addr
,
3446 struct batadv_tt_local_entry
*tt_local_entry
;
3449 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
3450 if (!tt_local_entry
)
3452 /* Check if the client has been logically deleted (but is kept for
3453 * consistency purpose)
3455 if ((tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
) ||
3456 (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
))
3461 batadv_tt_local_entry_put(tt_local_entry
);
3466 * batadv_handle_tt_response - process incoming tt reply
3467 * @bat_priv: the bat priv with all the soft interface information
3468 * @tt_data: tt data containing the tt request information
3469 * @resp_src: mac address of tt reply sender
3470 * @num_entries: number of tt change entries appended to the tt data
3472 static void batadv_handle_tt_response(struct batadv_priv
*bat_priv
,
3473 struct batadv_tvlv_tt_data
*tt_data
,
3474 u8
*resp_src
, u16 num_entries
)
3476 struct batadv_tt_req_node
*node
;
3477 struct hlist_node
*safe
;
3478 struct batadv_orig_node
*orig_node
= NULL
;
3479 struct batadv_tvlv_tt_change
*tt_change
;
3480 u8
*tvlv_ptr
= (u8
*)tt_data
;
3483 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3484 "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
3485 resp_src
, tt_data
->ttvn
, num_entries
,
3486 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
3488 orig_node
= batadv_orig_hash_find(bat_priv
, resp_src
);
3492 spin_lock_bh(&orig_node
->tt_lock
);
3494 change_offset
= sizeof(struct batadv_tvlv_tt_vlan_data
);
3495 change_offset
*= ntohs(tt_data
->num_vlan
);
3496 change_offset
+= sizeof(*tt_data
);
3497 tvlv_ptr
+= change_offset
;
3499 tt_change
= (struct batadv_tvlv_tt_change
*)tvlv_ptr
;
3500 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
) {
3501 batadv_tt_fill_gtable(bat_priv
, tt_change
, tt_data
->ttvn
,
3502 resp_src
, num_entries
);
3504 batadv_tt_update_changes(bat_priv
, orig_node
, num_entries
,
3505 tt_data
->ttvn
, tt_change
);
3508 /* Recalculate the CRC for this orig_node and store it */
3509 batadv_tt_global_update_crc(bat_priv
, orig_node
);
3511 spin_unlock_bh(&orig_node
->tt_lock
);
3513 /* Delete the tt_req_node from pending tt_requests list */
3514 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
3515 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
3516 if (!batadv_compare_eth(node
->addr
, resp_src
))
3518 hlist_del_init(&node
->list
);
3519 batadv_tt_req_node_put(node
);
3522 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
3525 batadv_orig_node_put(orig_node
);
3528 static void batadv_tt_roam_list_free(struct batadv_priv
*bat_priv
)
3530 struct batadv_tt_roam_node
*node
, *safe
;
3532 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3534 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.roam_list
, list
) {
3535 list_del(&node
->list
);
3536 kmem_cache_free(batadv_tt_roam_cache
, node
);
3539 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3542 static void batadv_tt_roam_purge(struct batadv_priv
*bat_priv
)
3544 struct batadv_tt_roam_node
*node
, *safe
;
3546 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3547 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.roam_list
, list
) {
3548 if (!batadv_has_timed_out(node
->first_time
,
3549 BATADV_ROAMING_MAX_TIME
))
3552 list_del(&node
->list
);
3553 kmem_cache_free(batadv_tt_roam_cache
, node
);
3555 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3559 * batadv_tt_check_roam_count - check if a client has roamed too frequently
3560 * @bat_priv: the bat priv with all the soft interface information
3561 * @client: mac address of the roaming client
3563 * This function checks whether the client already reached the
3564 * maximum number of possible roaming phases. In this case the ROAMING_ADV
3567 * Return: true if the ROAMING_ADV can be sent, false otherwise
3569 static bool batadv_tt_check_roam_count(struct batadv_priv
*bat_priv
, u8
*client
)
3571 struct batadv_tt_roam_node
*tt_roam_node
;
3574 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3575 /* The new tt_req will be issued only if I'm not waiting for a
3576 * reply from the same orig_node yet
3578 list_for_each_entry(tt_roam_node
, &bat_priv
->tt
.roam_list
, list
) {
3579 if (!batadv_compare_eth(tt_roam_node
->addr
, client
))
3582 if (batadv_has_timed_out(tt_roam_node
->first_time
,
3583 BATADV_ROAMING_MAX_TIME
))
3586 if (!batadv_atomic_dec_not_zero(&tt_roam_node
->counter
))
3587 /* Sorry, you roamed too many times! */
3594 tt_roam_node
= kmem_cache_alloc(batadv_tt_roam_cache
,
3599 tt_roam_node
->first_time
= jiffies
;
3600 atomic_set(&tt_roam_node
->counter
,
3601 BATADV_ROAMING_MAX_COUNT
- 1);
3602 ether_addr_copy(tt_roam_node
->addr
, client
);
3604 list_add(&tt_roam_node
->list
, &bat_priv
->tt
.roam_list
);
3609 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3614 * batadv_send_roam_adv - send a roaming advertisement message
3615 * @bat_priv: the bat priv with all the soft interface information
3616 * @client: mac address of the roaming client
3617 * @vid: VLAN identifier
3618 * @orig_node: message destination
3620 * Send a ROAMING_ADV message to the node which was previously serving this
3621 * client. This is done to inform the node that from now on all traffic destined
3622 * for this particular roamed client has to be forwarded to the sender of the
3625 static void batadv_send_roam_adv(struct batadv_priv
*bat_priv
, u8
*client
,
3627 struct batadv_orig_node
*orig_node
)
3629 struct batadv_hard_iface
*primary_if
;
3630 struct batadv_tvlv_roam_adv tvlv_roam
;
3632 primary_if
= batadv_primary_if_get_selected(bat_priv
);
3636 /* before going on we have to check whether the client has
3637 * already roamed to us too many times
3639 if (!batadv_tt_check_roam_count(bat_priv
, client
))
3642 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3643 "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n",
3644 orig_node
->orig
, client
, BATADV_PRINT_VID(vid
));
3646 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_ROAM_ADV_TX
);
3648 memcpy(tvlv_roam
.client
, client
, sizeof(tvlv_roam
.client
));
3649 tvlv_roam
.vid
= htons(vid
);
3651 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
3652 orig_node
->orig
, BATADV_TVLV_ROAM
, 1,
3653 &tvlv_roam
, sizeof(tvlv_roam
));
3657 batadv_hardif_put(primary_if
);
3660 static void batadv_tt_purge(struct work_struct
*work
)
3662 struct delayed_work
*delayed_work
;
3663 struct batadv_priv_tt
*priv_tt
;
3664 struct batadv_priv
*bat_priv
;
3666 delayed_work
= to_delayed_work(work
);
3667 priv_tt
= container_of(delayed_work
, struct batadv_priv_tt
, work
);
3668 bat_priv
= container_of(priv_tt
, struct batadv_priv
, tt
);
3670 batadv_tt_local_purge(bat_priv
, BATADV_TT_LOCAL_TIMEOUT
);
3671 batadv_tt_global_purge(bat_priv
);
3672 batadv_tt_req_purge(bat_priv
);
3673 batadv_tt_roam_purge(bat_priv
);
3675 queue_delayed_work(batadv_event_workqueue
, &bat_priv
->tt
.work
,
3676 msecs_to_jiffies(BATADV_TT_WORK_PERIOD
));
3679 void batadv_tt_free(struct batadv_priv
*bat_priv
)
3681 batadv_tvlv_container_unregister(bat_priv
, BATADV_TVLV_TT
, 1);
3682 batadv_tvlv_handler_unregister(bat_priv
, BATADV_TVLV_TT
, 1);
3684 cancel_delayed_work_sync(&bat_priv
->tt
.work
);
3686 batadv_tt_local_table_free(bat_priv
);
3687 batadv_tt_global_table_free(bat_priv
);
3688 batadv_tt_req_list_free(bat_priv
);
3689 batadv_tt_changes_list_free(bat_priv
);
3690 batadv_tt_roam_list_free(bat_priv
);
3692 kfree(bat_priv
->tt
.last_changeset
);
3696 * batadv_tt_local_set_flags - set or unset the specified flags on the local
3697 * table and possibly count them in the TT size
3698 * @bat_priv: the bat priv with all the soft interface information
3699 * @flags: the flag to switch
3700 * @enable: whether to set or unset the flag
3701 * @count: whether to increase the TT size by the number of changed entries
3703 static void batadv_tt_local_set_flags(struct batadv_priv
*bat_priv
, u16 flags
,
3704 bool enable
, bool count
)
3706 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
3707 struct batadv_tt_common_entry
*tt_common_entry
;
3708 u16 changed_num
= 0;
3709 struct hlist_head
*head
;
3715 for (i
= 0; i
< hash
->size
; i
++) {
3716 head
= &hash
->table
[i
];
3719 hlist_for_each_entry_rcu(tt_common_entry
,
3722 if ((tt_common_entry
->flags
& flags
) == flags
)
3724 tt_common_entry
->flags
|= flags
;
3726 if (!(tt_common_entry
->flags
& flags
))
3728 tt_common_entry
->flags
&= ~flags
;
3735 batadv_tt_local_size_inc(bat_priv
,
3736 tt_common_entry
->vid
);
3742 /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */
3743 static void batadv_tt_local_purge_pending_clients(struct batadv_priv
*bat_priv
)
3745 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
3746 struct batadv_tt_common_entry
*tt_common
;
3747 struct batadv_tt_local_entry
*tt_local
;
3748 struct hlist_node
*node_tmp
;
3749 struct hlist_head
*head
;
3750 spinlock_t
*list_lock
; /* protects write access to the hash lists */
3756 for (i
= 0; i
< hash
->size
; i
++) {
3757 head
= &hash
->table
[i
];
3758 list_lock
= &hash
->list_locks
[i
];
3760 spin_lock_bh(list_lock
);
3761 hlist_for_each_entry_safe(tt_common
, node_tmp
, head
,
3763 if (!(tt_common
->flags
& BATADV_TT_CLIENT_PENDING
))
3766 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3767 "Deleting local tt entry (%pM, vid: %d): pending\n",
3769 BATADV_PRINT_VID(tt_common
->vid
));
3771 batadv_tt_local_size_dec(bat_priv
, tt_common
->vid
);
3772 hlist_del_rcu(&tt_common
->hash_entry
);
3773 tt_local
= container_of(tt_common
,
3774 struct batadv_tt_local_entry
,
3777 batadv_tt_local_entry_put(tt_local
);
3779 spin_unlock_bh(list_lock
);
3784 * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes
3785 * which have been queued in the time since the last commit
3786 * @bat_priv: the bat priv with all the soft interface information
3788 * Caller must hold tt->commit_lock.
3790 static void batadv_tt_local_commit_changes_nolock(struct batadv_priv
*bat_priv
)
3792 lockdep_assert_held(&bat_priv
->tt
.commit_lock
);
3794 /* Update multicast addresses in local translation table */
3795 batadv_mcast_mla_update(bat_priv
);
3797 if (atomic_read(&bat_priv
->tt
.local_changes
) < 1) {
3798 if (!batadv_atomic_dec_not_zero(&bat_priv
->tt
.ogm_append_cnt
))
3799 batadv_tt_tvlv_container_update(bat_priv
);
3803 batadv_tt_local_set_flags(bat_priv
, BATADV_TT_CLIENT_NEW
, false, true);
3805 batadv_tt_local_purge_pending_clients(bat_priv
);
3806 batadv_tt_local_update_crc(bat_priv
);
3808 /* Increment the TTVN only once per OGM interval */
3809 atomic_inc(&bat_priv
->tt
.vn
);
3810 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3811 "Local changes committed, updating to ttvn %u\n",
3812 (u8
)atomic_read(&bat_priv
->tt
.vn
));
3814 /* reset the sending counter */
3815 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, BATADV_TT_OGM_APPEND_MAX
);
3816 batadv_tt_tvlv_container_update(bat_priv
);
3820 * batadv_tt_local_commit_changes - commit all pending local tt changes which
3821 * have been queued in the time since the last commit
3822 * @bat_priv: the bat priv with all the soft interface information
3824 void batadv_tt_local_commit_changes(struct batadv_priv
*bat_priv
)
3826 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
3827 batadv_tt_local_commit_changes_nolock(bat_priv
);
3828 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
3831 bool batadv_is_ap_isolated(struct batadv_priv
*bat_priv
, u8
*src
, u8
*dst
,
3834 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
3835 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
3836 struct batadv_softif_vlan
*vlan
;
3839 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
3843 if (!atomic_read(&vlan
->ap_isolation
))
3846 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, dst
, vid
);
3847 if (!tt_local_entry
)
3850 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, src
, vid
);
3851 if (!tt_global_entry
)
3854 if (!_batadv_is_ap_isolated(tt_local_entry
, tt_global_entry
))
3860 batadv_softif_vlan_put(vlan
);
3861 if (tt_global_entry
)
3862 batadv_tt_global_entry_put(tt_global_entry
);
3864 batadv_tt_local_entry_put(tt_local_entry
);
3869 * batadv_tt_update_orig - update global translation table with new tt
3870 * information received via ogms
3871 * @bat_priv: the bat priv with all the soft interface information
3872 * @orig_node: the orig_node of the ogm
3873 * @tt_buff: pointer to the first tvlv VLAN entry
3874 * @tt_num_vlan: number of tvlv VLAN entries
3875 * @tt_change: pointer to the first entry in the TT buffer
3876 * @tt_num_changes: number of tt changes inside the tt buffer
3877 * @ttvn: translation table version number of this changeset
3879 static void batadv_tt_update_orig(struct batadv_priv
*bat_priv
,
3880 struct batadv_orig_node
*orig_node
,
3881 const void *tt_buff
, u16 tt_num_vlan
,
3882 struct batadv_tvlv_tt_change
*tt_change
,
3883 u16 tt_num_changes
, u8 ttvn
)
3885 u8 orig_ttvn
= (u8
)atomic_read(&orig_node
->last_ttvn
);
3886 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
3887 bool full_table
= true;
3890 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)tt_buff
;
3891 has_tt_init
= test_bit(BATADV_ORIG_CAPA_HAS_TT
,
3892 &orig_node
->capa_initialized
);
3894 /* orig table not initialised AND first diff is in the OGM OR the ttvn
3895 * increased by one -> we can apply the attached changes
3897 if ((!has_tt_init
&& ttvn
== 1) || ttvn
- orig_ttvn
== 1) {
3898 /* the OGM could not contain the changes due to their size or
3899 * because they have already been sent BATADV_TT_OGM_APPEND_MAX
3901 * In this case send a tt request
3903 if (!tt_num_changes
) {
3908 spin_lock_bh(&orig_node
->tt_lock
);
3910 batadv_tt_update_changes(bat_priv
, orig_node
, tt_num_changes
,
3913 /* Even if we received the precomputed crc with the OGM, we
3914 * prefer to recompute it to spot any possible inconsistency
3915 * in the global table
3917 batadv_tt_global_update_crc(bat_priv
, orig_node
);
3919 spin_unlock_bh(&orig_node
->tt_lock
);
3921 /* The ttvn alone is not enough to guarantee consistency
3922 * because a single value could represent different states
3923 * (due to the wrap around). Thus a node has to check whether
3924 * the resulting table (after applying the changes) is still
3925 * consistent or not. E.g. a node could disconnect while its
3926 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
3927 * checking the CRC value is mandatory to detect the
3930 if (!batadv_tt_global_check_crc(orig_node
, tt_vlan
,
3934 /* if we missed more than one change or our tables are not
3935 * in sync anymore -> request fresh tt data
3937 if (!has_tt_init
|| ttvn
!= orig_ttvn
||
3938 !batadv_tt_global_check_crc(orig_node
, tt_vlan
,
3941 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3942 "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n",
3943 orig_node
->orig
, ttvn
, orig_ttvn
,
3945 batadv_send_tt_request(bat_priv
, orig_node
, ttvn
,
3946 tt_vlan
, tt_num_vlan
,
3954 * batadv_tt_global_client_is_roaming - check if a client is marked as roaming
3955 * @bat_priv: the bat priv with all the soft interface information
3956 * @addr: the mac address of the client to check
3957 * @vid: VLAN identifier
3959 * Return: true if we know that the client has moved from its old originator
3960 * to another one. This entry is still kept for consistency purposes and will be
3961 * deleted later by a DEL or because of timeout
3963 bool batadv_tt_global_client_is_roaming(struct batadv_priv
*bat_priv
,
3964 u8
*addr
, unsigned short vid
)
3966 struct batadv_tt_global_entry
*tt_global_entry
;
3969 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
3970 if (!tt_global_entry
)
3973 ret
= tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
;
3974 batadv_tt_global_entry_put(tt_global_entry
);
3980 * batadv_tt_local_client_is_roaming - tells whether the client is roaming
3981 * @bat_priv: the bat priv with all the soft interface information
3982 * @addr: the mac address of the local client to query
3983 * @vid: VLAN identifier
3985 * Return: true if the local client is known to be roaming (it is not served by
3986 * this node anymore) or not. If yes, the client is still present in the table
3987 * to keep the latter consistent with the node TTVN
3989 bool batadv_tt_local_client_is_roaming(struct batadv_priv
*bat_priv
,
3990 u8
*addr
, unsigned short vid
)
3992 struct batadv_tt_local_entry
*tt_local_entry
;
3995 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
3996 if (!tt_local_entry
)
3999 ret
= tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
;
4000 batadv_tt_local_entry_put(tt_local_entry
);
4005 bool batadv_tt_add_temporary_global_entry(struct batadv_priv
*bat_priv
,
4006 struct batadv_orig_node
*orig_node
,
4007 const unsigned char *addr
,
4012 if (!batadv_tt_global_add(bat_priv
, orig_node
, addr
, vid
,
4013 BATADV_TT_CLIENT_TEMP
,
4014 atomic_read(&orig_node
->last_ttvn
)))
4017 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
4018 "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n",
4019 addr
, BATADV_PRINT_VID(vid
), orig_node
->orig
);
4026 * batadv_tt_local_resize_to_mtu - resize the local translation table fit the
4027 * maximum packet size that can be transported through the mesh
4028 * @soft_iface: netdev struct of the mesh interface
4030 * Remove entries older than 'timeout' and half timeout if more entries need
4033 void batadv_tt_local_resize_to_mtu(struct net_device
*soft_iface
)
4035 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
4036 int packet_size_max
= atomic_read(&bat_priv
->packet_size_max
);
4037 int table_size
, timeout
= BATADV_TT_LOCAL_TIMEOUT
/ 2;
4038 bool reduced
= false;
4040 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
4043 table_size
= batadv_tt_local_table_transmit_size(bat_priv
);
4044 if (packet_size_max
>= table_size
)
4047 batadv_tt_local_purge(bat_priv
, timeout
);
4048 batadv_tt_local_purge_pending_clients(bat_priv
);
4052 net_ratelimited_function(batadv_info
, soft_iface
,
4053 "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n",
4057 /* commit these changes immediately, to avoid synchronization problem
4061 batadv_tt_local_commit_changes_nolock(bat_priv
);
4063 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
4067 * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container
4068 * @bat_priv: the bat priv with all the soft interface information
4069 * @orig: the orig_node of the ogm
4070 * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
4071 * @tvlv_value: tvlv buffer containing the gateway data
4072 * @tvlv_value_len: tvlv buffer length
4074 static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv
*bat_priv
,
4075 struct batadv_orig_node
*orig
,
4076 u8 flags
, void *tvlv_value
,
4079 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
4080 struct batadv_tvlv_tt_change
*tt_change
;
4081 struct batadv_tvlv_tt_data
*tt_data
;
4082 u16 num_entries
, num_vlan
;
4084 if (tvlv_value_len
< sizeof(*tt_data
))
4087 tt_data
= (struct batadv_tvlv_tt_data
*)tvlv_value
;
4088 tvlv_value_len
-= sizeof(*tt_data
);
4090 num_vlan
= ntohs(tt_data
->num_vlan
);
4092 if (tvlv_value_len
< sizeof(*tt_vlan
) * num_vlan
)
4095 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(tt_data
+ 1);
4096 tt_change
= (struct batadv_tvlv_tt_change
*)(tt_vlan
+ num_vlan
);
4097 tvlv_value_len
-= sizeof(*tt_vlan
) * num_vlan
;
4099 num_entries
= batadv_tt_entries(tvlv_value_len
);
4101 batadv_tt_update_orig(bat_priv
, orig
, tt_vlan
, num_vlan
, tt_change
,
4102 num_entries
, tt_data
->ttvn
);
4106 * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv
4108 * @bat_priv: the bat priv with all the soft interface information
4109 * @src: mac address of tt tvlv sender
4110 * @dst: mac address of tt tvlv recipient
4111 * @tvlv_value: tvlv buffer containing the tt data
4112 * @tvlv_value_len: tvlv buffer length
4114 * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS
4117 static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv
*bat_priv
,
4122 struct batadv_tvlv_tt_data
*tt_data
;
4123 u16 tt_vlan_len
, tt_num_entries
;
4127 if (tvlv_value_len
< sizeof(*tt_data
))
4128 return NET_RX_SUCCESS
;
4130 tt_data
= (struct batadv_tvlv_tt_data
*)tvlv_value
;
4131 tvlv_value_len
-= sizeof(*tt_data
);
4133 tt_vlan_len
= sizeof(struct batadv_tvlv_tt_vlan_data
);
4134 tt_vlan_len
*= ntohs(tt_data
->num_vlan
);
4136 if (tvlv_value_len
< tt_vlan_len
)
4137 return NET_RX_SUCCESS
;
4139 tvlv_value_len
-= tt_vlan_len
;
4140 tt_num_entries
= batadv_tt_entries(tvlv_value_len
);
4142 switch (tt_data
->flags
& BATADV_TT_DATA_TYPE_MASK
) {
4143 case BATADV_TT_REQUEST
:
4144 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_REQUEST_RX
);
4146 /* If this node cannot provide a TT response the tt_request is
4149 ret
= batadv_send_tt_response(bat_priv
, tt_data
, src
, dst
);
4151 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
)
4156 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
4157 "Routing TT_REQUEST to %pM [%c]\n",
4159 /* tvlv API will re-route the packet */
4163 case BATADV_TT_RESPONSE
:
4164 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_RX
);
4166 if (batadv_is_my_mac(bat_priv
, dst
)) {
4167 batadv_handle_tt_response(bat_priv
, tt_data
,
4168 src
, tt_num_entries
);
4169 return NET_RX_SUCCESS
;
4172 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
)
4177 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
4178 "Routing TT_RESPONSE to %pM [%c]\n", dst
, tt_flag
);
4180 /* tvlv API will re-route the packet */
4184 return NET_RX_SUCCESS
;
4188 * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container
4189 * @bat_priv: the bat priv with all the soft interface information
4190 * @src: mac address of tt tvlv sender
4191 * @dst: mac address of tt tvlv recipient
4192 * @tvlv_value: tvlv buffer containing the tt data
4193 * @tvlv_value_len: tvlv buffer length
4195 * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS
4198 static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv
*bat_priv
,
4203 struct batadv_tvlv_roam_adv
*roaming_adv
;
4204 struct batadv_orig_node
*orig_node
= NULL
;
4206 /* If this node is not the intended recipient of the
4207 * roaming advertisement the packet is forwarded
4208 * (the tvlv API will re-route the packet).
4210 if (!batadv_is_my_mac(bat_priv
, dst
))
4213 if (tvlv_value_len
< sizeof(*roaming_adv
))
4216 orig_node
= batadv_orig_hash_find(bat_priv
, src
);
4220 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_ROAM_ADV_RX
);
4221 roaming_adv
= (struct batadv_tvlv_roam_adv
*)tvlv_value
;
4223 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
4224 "Received ROAMING_ADV from %pM (client %pM)\n",
4225 src
, roaming_adv
->client
);
4227 batadv_tt_global_add(bat_priv
, orig_node
, roaming_adv
->client
,
4228 ntohs(roaming_adv
->vid
), BATADV_TT_CLIENT_ROAM
,
4229 atomic_read(&orig_node
->last_ttvn
) + 1);
4233 batadv_orig_node_put(orig_node
);
4234 return NET_RX_SUCCESS
;
4238 * batadv_tt_init - initialise the translation table internals
4239 * @bat_priv: the bat priv with all the soft interface information
4241 * Return: 0 on success or negative error number in case of failure.
4243 int batadv_tt_init(struct batadv_priv
*bat_priv
)
4247 /* synchronized flags must be remote */
4248 BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK
& BATADV_TT_REMOTE_MASK
));
4250 ret
= batadv_tt_local_init(bat_priv
);
4254 ret
= batadv_tt_global_init(bat_priv
);
4258 batadv_tvlv_handler_register(bat_priv
, batadv_tt_tvlv_ogm_handler_v1
,
4259 batadv_tt_tvlv_unicast_handler_v1
,
4260 BATADV_TVLV_TT
, 1, BATADV_NO_FLAGS
);
4262 batadv_tvlv_handler_register(bat_priv
, NULL
,
4263 batadv_roam_tvlv_unicast_handler_v1
,
4264 BATADV_TVLV_ROAM
, 1, BATADV_NO_FLAGS
);
4266 INIT_DELAYED_WORK(&bat_priv
->tt
.work
, batadv_tt_purge
);
4267 queue_delayed_work(batadv_event_workqueue
, &bat_priv
->tt
.work
,
4268 msecs_to_jiffies(BATADV_TT_WORK_PERIOD
));
4274 * batadv_tt_global_is_isolated - check if a client is marked as isolated
4275 * @bat_priv: the bat priv with all the soft interface information
4276 * @addr: the mac address of the client
4277 * @vid: the identifier of the VLAN where this client is connected
4279 * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false
4282 bool batadv_tt_global_is_isolated(struct batadv_priv
*bat_priv
,
4283 const u8
*addr
, unsigned short vid
)
4285 struct batadv_tt_global_entry
*tt
;
4288 tt
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
4292 ret
= tt
->common
.flags
& BATADV_TT_CLIENT_ISOLA
;
4294 batadv_tt_global_entry_put(tt
);
4300 * batadv_tt_cache_init - Initialize tt memory object cache
4302 * Return: 0 on success or negative error number in case of failure.
4304 int __init
batadv_tt_cache_init(void)
4306 size_t tl_size
= sizeof(struct batadv_tt_local_entry
);
4307 size_t tg_size
= sizeof(struct batadv_tt_global_entry
);
4308 size_t tt_orig_size
= sizeof(struct batadv_tt_orig_list_entry
);
4309 size_t tt_change_size
= sizeof(struct batadv_tt_change_node
);
4310 size_t tt_req_size
= sizeof(struct batadv_tt_req_node
);
4311 size_t tt_roam_size
= sizeof(struct batadv_tt_roam_node
);
4313 batadv_tl_cache
= kmem_cache_create("batadv_tl_cache", tl_size
, 0,
4314 SLAB_HWCACHE_ALIGN
, NULL
);
4315 if (!batadv_tl_cache
)
4318 batadv_tg_cache
= kmem_cache_create("batadv_tg_cache", tg_size
, 0,
4319 SLAB_HWCACHE_ALIGN
, NULL
);
4320 if (!batadv_tg_cache
)
4321 goto err_tt_tl_destroy
;
4323 batadv_tt_orig_cache
= kmem_cache_create("batadv_tt_orig_cache",
4325 SLAB_HWCACHE_ALIGN
, NULL
);
4326 if (!batadv_tt_orig_cache
)
4327 goto err_tt_tg_destroy
;
4329 batadv_tt_change_cache
= kmem_cache_create("batadv_tt_change_cache",
4331 SLAB_HWCACHE_ALIGN
, NULL
);
4332 if (!batadv_tt_change_cache
)
4333 goto err_tt_orig_destroy
;
4335 batadv_tt_req_cache
= kmem_cache_create("batadv_tt_req_cache",
4337 SLAB_HWCACHE_ALIGN
, NULL
);
4338 if (!batadv_tt_req_cache
)
4339 goto err_tt_change_destroy
;
4341 batadv_tt_roam_cache
= kmem_cache_create("batadv_tt_roam_cache",
4343 SLAB_HWCACHE_ALIGN
, NULL
);
4344 if (!batadv_tt_roam_cache
)
4345 goto err_tt_req_destroy
;
4350 kmem_cache_destroy(batadv_tt_req_cache
);
4351 batadv_tt_req_cache
= NULL
;
4352 err_tt_change_destroy
:
4353 kmem_cache_destroy(batadv_tt_change_cache
);
4354 batadv_tt_change_cache
= NULL
;
4355 err_tt_orig_destroy
:
4356 kmem_cache_destroy(batadv_tt_orig_cache
);
4357 batadv_tt_orig_cache
= NULL
;
4359 kmem_cache_destroy(batadv_tg_cache
);
4360 batadv_tg_cache
= NULL
;
4362 kmem_cache_destroy(batadv_tl_cache
);
4363 batadv_tl_cache
= NULL
;
4369 * batadv_tt_cache_destroy - Destroy tt memory object cache
4371 void batadv_tt_cache_destroy(void)
4373 kmem_cache_destroy(batadv_tl_cache
);
4374 kmem_cache_destroy(batadv_tg_cache
);
4375 kmem_cache_destroy(batadv_tt_orig_cache
);
4376 kmem_cache_destroy(batadv_tt_change_cache
);
4377 kmem_cache_destroy(batadv_tt_req_cache
);
4378 kmem_cache_destroy(batadv_tt_roam_cache
);