1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) B.A.T.M.A.N. contributors:
4 * Marek Lindner, Simon Wunderlich, Antonio Quartulli
7 #include "translation-table.h"
10 #include <linux/atomic.h>
11 #include <linux/bitops.h>
12 #include <linux/build_bug.h>
13 #include <linux/byteorder/generic.h>
14 #include <linux/cache.h>
15 #include <linux/compiler.h>
16 #include <linux/crc32c.h>
17 #include <linux/errno.h>
18 #include <linux/etherdevice.h>
19 #include <linux/gfp.h>
20 #include <linux/if_ether.h>
21 #include <linux/init.h>
22 #include <linux/jhash.h>
23 #include <linux/jiffies.h>
24 #include <linux/kernel.h>
25 #include <linux/kref.h>
26 #include <linux/list.h>
27 #include <linux/lockdep.h>
28 #include <linux/net.h>
29 #include <linux/netdevice.h>
30 #include <linux/netlink.h>
31 #include <linux/rculist.h>
32 #include <linux/rcupdate.h>
33 #include <linux/skbuff.h>
34 #include <linux/slab.h>
35 #include <linux/spinlock.h>
36 #include <linux/stddef.h>
37 #include <linux/string.h>
38 #include <linux/workqueue.h>
39 #include <net/genetlink.h>
40 #include <net/netlink.h>
42 #include <uapi/linux/batadv_packet.h>
43 #include <uapi/linux/batman_adv.h>
45 #include "bridge_loop_avoidance.h"
46 #include "hard-interface.h"
50 #include "originator.h"
51 #include "soft-interface.h"
54 static struct kmem_cache
*batadv_tl_cache __read_mostly
;
55 static struct kmem_cache
*batadv_tg_cache __read_mostly
;
56 static struct kmem_cache
*batadv_tt_orig_cache __read_mostly
;
57 static struct kmem_cache
*batadv_tt_change_cache __read_mostly
;
58 static struct kmem_cache
*batadv_tt_req_cache __read_mostly
;
59 static struct kmem_cache
*batadv_tt_roam_cache __read_mostly
;
62 static struct lock_class_key batadv_tt_local_hash_lock_class_key
;
63 static struct lock_class_key batadv_tt_global_hash_lock_class_key
;
65 static void batadv_send_roam_adv(struct batadv_priv
*bat_priv
, u8
*client
,
67 struct batadv_orig_node
*orig_node
);
68 static void batadv_tt_purge(struct work_struct
*work
);
70 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry
*tt_global_entry
);
71 static void batadv_tt_global_del(struct batadv_priv
*bat_priv
,
72 struct batadv_orig_node
*orig_node
,
73 const unsigned char *addr
,
74 unsigned short vid
, const char *message
,
78 * batadv_compare_tt() - check if two TT entries are the same
79 * @node: the list element pointer of the first TT entry
80 * @data2: pointer to the tt_common_entry of the second TT entry
82 * Compare the MAC address and the VLAN ID of the two TT entries and check if
83 * they are the same TT client.
84 * Return: true if the two TT clients are the same, false otherwise
86 static bool batadv_compare_tt(const struct hlist_node
*node
, const void *data2
)
88 const void *data1
= container_of(node
, struct batadv_tt_common_entry
,
90 const struct batadv_tt_common_entry
*tt1
= data1
;
91 const struct batadv_tt_common_entry
*tt2
= data2
;
93 return (tt1
->vid
== tt2
->vid
) && batadv_compare_eth(data1
, data2
);
97 * batadv_choose_tt() - return the index of the tt entry in the hash table
98 * @data: pointer to the tt_common_entry object to map
99 * @size: the size of the hash table
101 * Return: the hash index where the object represented by 'data' should be
104 static inline u32
batadv_choose_tt(const void *data
, u32 size
)
106 struct batadv_tt_common_entry
*tt
;
109 tt
= (struct batadv_tt_common_entry
*)data
;
110 hash
= jhash(&tt
->addr
, ETH_ALEN
, hash
);
111 hash
= jhash(&tt
->vid
, sizeof(tt
->vid
), hash
);
117 * batadv_tt_hash_find() - look for a client in the given hash table
118 * @hash: the hash table to search
119 * @addr: the mac address of the client to look for
120 * @vid: VLAN identifier
122 * Return: a pointer to the tt_common struct belonging to the searched client if
123 * found, NULL otherwise.
125 static struct batadv_tt_common_entry
*
126 batadv_tt_hash_find(struct batadv_hashtable
*hash
, const u8
*addr
,
129 struct hlist_head
*head
;
130 struct batadv_tt_common_entry to_search
, *tt
, *tt_tmp
= NULL
;
136 ether_addr_copy(to_search
.addr
, addr
);
139 index
= batadv_choose_tt(&to_search
, hash
->size
);
140 head
= &hash
->table
[index
];
143 hlist_for_each_entry_rcu(tt
, head
, hash_entry
) {
144 if (!batadv_compare_eth(tt
, addr
))
150 if (!kref_get_unless_zero(&tt
->refcount
))
162 * batadv_tt_local_hash_find() - search the local table for a given client
163 * @bat_priv: the bat priv with all the soft interface information
164 * @addr: the mac address of the client to look for
165 * @vid: VLAN identifier
167 * Return: a pointer to the corresponding tt_local_entry struct if the client is
168 * found, NULL otherwise.
170 static struct batadv_tt_local_entry
*
171 batadv_tt_local_hash_find(struct batadv_priv
*bat_priv
, const u8
*addr
,
174 struct batadv_tt_common_entry
*tt_common_entry
;
175 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
177 tt_common_entry
= batadv_tt_hash_find(bat_priv
->tt
.local_hash
, addr
,
180 tt_local_entry
= container_of(tt_common_entry
,
181 struct batadv_tt_local_entry
,
183 return tt_local_entry
;
187 * batadv_tt_global_hash_find() - search the global table for a given client
188 * @bat_priv: the bat priv with all the soft interface information
189 * @addr: the mac address of the client to look for
190 * @vid: VLAN identifier
192 * Return: a pointer to the corresponding tt_global_entry struct if the client
193 * is found, NULL otherwise.
195 struct batadv_tt_global_entry
*
196 batadv_tt_global_hash_find(struct batadv_priv
*bat_priv
, const u8
*addr
,
199 struct batadv_tt_common_entry
*tt_common_entry
;
200 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
202 tt_common_entry
= batadv_tt_hash_find(bat_priv
->tt
.global_hash
, addr
,
205 tt_global_entry
= container_of(tt_common_entry
,
206 struct batadv_tt_global_entry
,
208 return tt_global_entry
;
212 * batadv_tt_local_entry_free_rcu() - free the tt_local_entry
213 * @rcu: rcu pointer of the tt_local_entry
215 static void batadv_tt_local_entry_free_rcu(struct rcu_head
*rcu
)
217 struct batadv_tt_local_entry
*tt_local_entry
;
219 tt_local_entry
= container_of(rcu
, struct batadv_tt_local_entry
,
222 kmem_cache_free(batadv_tl_cache
, tt_local_entry
);
226 * batadv_tt_local_entry_release() - release tt_local_entry from lists and queue
227 * for free after rcu grace period
228 * @ref: kref pointer of the nc_node
230 static void batadv_tt_local_entry_release(struct kref
*ref
)
232 struct batadv_tt_local_entry
*tt_local_entry
;
234 tt_local_entry
= container_of(ref
, struct batadv_tt_local_entry
,
237 batadv_softif_vlan_put(tt_local_entry
->vlan
);
239 call_rcu(&tt_local_entry
->common
.rcu
, batadv_tt_local_entry_free_rcu
);
243 * batadv_tt_local_entry_put() - decrement the tt_local_entry refcounter and
244 * possibly release it
245 * @tt_local_entry: tt_local_entry to be free'd
248 batadv_tt_local_entry_put(struct batadv_tt_local_entry
*tt_local_entry
)
253 kref_put(&tt_local_entry
->common
.refcount
,
254 batadv_tt_local_entry_release
);
258 * batadv_tt_global_entry_free_rcu() - free the tt_global_entry
259 * @rcu: rcu pointer of the tt_global_entry
261 static void batadv_tt_global_entry_free_rcu(struct rcu_head
*rcu
)
263 struct batadv_tt_global_entry
*tt_global_entry
;
265 tt_global_entry
= container_of(rcu
, struct batadv_tt_global_entry
,
268 kmem_cache_free(batadv_tg_cache
, tt_global_entry
);
272 * batadv_tt_global_entry_release() - release tt_global_entry from lists and
273 * queue for free after rcu grace period
274 * @ref: kref pointer of the nc_node
276 void batadv_tt_global_entry_release(struct kref
*ref
)
278 struct batadv_tt_global_entry
*tt_global_entry
;
280 tt_global_entry
= container_of(ref
, struct batadv_tt_global_entry
,
283 batadv_tt_global_del_orig_list(tt_global_entry
);
285 call_rcu(&tt_global_entry
->common
.rcu
, batadv_tt_global_entry_free_rcu
);
289 * batadv_tt_global_hash_count() - count the number of orig entries
290 * @bat_priv: the bat priv with all the soft interface information
291 * @addr: the mac address of the client to count entries for
292 * @vid: VLAN identifier
294 * Return: the number of originators advertising the given address/data
295 * (excluding our self).
297 int batadv_tt_global_hash_count(struct batadv_priv
*bat_priv
,
298 const u8
*addr
, unsigned short vid
)
300 struct batadv_tt_global_entry
*tt_global_entry
;
303 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
304 if (!tt_global_entry
)
307 count
= atomic_read(&tt_global_entry
->orig_list_count
);
308 batadv_tt_global_entry_put(tt_global_entry
);
314 * batadv_tt_local_size_mod() - change the size by v of the local table
316 * @bat_priv: the bat priv with all the soft interface information
317 * @vid: the VLAN identifier of the sub-table to change
318 * @v: the amount to sum to the local table size
320 static void batadv_tt_local_size_mod(struct batadv_priv
*bat_priv
,
321 unsigned short vid
, int v
)
323 struct batadv_softif_vlan
*vlan
;
325 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
329 atomic_add(v
, &vlan
->tt
.num_entries
);
331 batadv_softif_vlan_put(vlan
);
335 * batadv_tt_local_size_inc() - increase by one the local table size for the
337 * @bat_priv: the bat priv with all the soft interface information
338 * @vid: the VLAN identifier
340 static void batadv_tt_local_size_inc(struct batadv_priv
*bat_priv
,
343 batadv_tt_local_size_mod(bat_priv
, vid
, 1);
347 * batadv_tt_local_size_dec() - decrease by one the local table size for the
349 * @bat_priv: the bat priv with all the soft interface information
350 * @vid: the VLAN identifier
352 static void batadv_tt_local_size_dec(struct batadv_priv
*bat_priv
,
355 batadv_tt_local_size_mod(bat_priv
, vid
, -1);
359 * batadv_tt_global_size_mod() - change the size by v of the global table
360 * for orig_node identified by vid
361 * @orig_node: the originator for which the table has to be modified
362 * @vid: the VLAN identifier
363 * @v: the amount to sum to the global table size
365 static void batadv_tt_global_size_mod(struct batadv_orig_node
*orig_node
,
366 unsigned short vid
, int v
)
368 struct batadv_orig_node_vlan
*vlan
;
370 vlan
= batadv_orig_node_vlan_new(orig_node
, vid
);
374 if (atomic_add_return(v
, &vlan
->tt
.num_entries
) == 0) {
375 spin_lock_bh(&orig_node
->vlan_list_lock
);
376 if (!hlist_unhashed(&vlan
->list
)) {
377 hlist_del_init_rcu(&vlan
->list
);
378 batadv_orig_node_vlan_put(vlan
);
380 spin_unlock_bh(&orig_node
->vlan_list_lock
);
383 batadv_orig_node_vlan_put(vlan
);
387 * batadv_tt_global_size_inc() - increase by one the global table size for the
389 * @orig_node: the originator which global table size has to be decreased
390 * @vid: the vlan identifier
392 static void batadv_tt_global_size_inc(struct batadv_orig_node
*orig_node
,
395 batadv_tt_global_size_mod(orig_node
, vid
, 1);
399 * batadv_tt_global_size_dec() - decrease by one the global table size for the
401 * @orig_node: the originator which global table size has to be decreased
402 * @vid: the vlan identifier
404 static void batadv_tt_global_size_dec(struct batadv_orig_node
*orig_node
,
407 batadv_tt_global_size_mod(orig_node
, vid
, -1);
411 * batadv_tt_orig_list_entry_free_rcu() - free the orig_entry
412 * @rcu: rcu pointer of the orig_entry
414 static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head
*rcu
)
416 struct batadv_tt_orig_list_entry
*orig_entry
;
418 orig_entry
= container_of(rcu
, struct batadv_tt_orig_list_entry
, rcu
);
420 kmem_cache_free(batadv_tt_orig_cache
, orig_entry
);
424 * batadv_tt_orig_list_entry_release() - release tt orig entry from lists and
425 * queue for free after rcu grace period
426 * @ref: kref pointer of the tt orig entry
428 static void batadv_tt_orig_list_entry_release(struct kref
*ref
)
430 struct batadv_tt_orig_list_entry
*orig_entry
;
432 orig_entry
= container_of(ref
, struct batadv_tt_orig_list_entry
,
435 batadv_orig_node_put(orig_entry
->orig_node
);
436 call_rcu(&orig_entry
->rcu
, batadv_tt_orig_list_entry_free_rcu
);
440 * batadv_tt_orig_list_entry_put() - decrement the tt orig entry refcounter and
441 * possibly release it
442 * @orig_entry: tt orig entry to be free'd
445 batadv_tt_orig_list_entry_put(struct batadv_tt_orig_list_entry
*orig_entry
)
450 kref_put(&orig_entry
->refcount
, batadv_tt_orig_list_entry_release
);
454 * batadv_tt_local_event() - store a local TT event (ADD/DEL)
455 * @bat_priv: the bat priv with all the soft interface information
456 * @tt_local_entry: the TT entry involved in the event
457 * @event_flags: flags to store in the event structure
459 static void batadv_tt_local_event(struct batadv_priv
*bat_priv
,
460 struct batadv_tt_local_entry
*tt_local_entry
,
463 struct batadv_tt_change_node
*tt_change_node
, *entry
, *safe
;
464 struct batadv_tt_common_entry
*common
= &tt_local_entry
->common
;
465 u8 flags
= common
->flags
| event_flags
;
466 bool event_removed
= false;
467 bool del_op_requested
, del_op_entry
;
469 tt_change_node
= kmem_cache_alloc(batadv_tt_change_cache
, GFP_ATOMIC
);
473 tt_change_node
->change
.flags
= flags
;
474 memset(tt_change_node
->change
.reserved
, 0,
475 sizeof(tt_change_node
->change
.reserved
));
476 ether_addr_copy(tt_change_node
->change
.addr
, common
->addr
);
477 tt_change_node
->change
.vid
= htons(common
->vid
);
479 del_op_requested
= flags
& BATADV_TT_CLIENT_DEL
;
481 /* check for ADD+DEL or DEL+ADD events */
482 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
483 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
485 if (!batadv_compare_eth(entry
->change
.addr
, common
->addr
))
488 /* DEL+ADD in the same orig interval have no effect and can be
489 * removed to avoid silly behaviour on the receiver side. The
490 * other way around (ADD+DEL) can happen in case of roaming of
491 * a client still in the NEW state. Roaming of NEW clients is
492 * now possible due to automatically recognition of "temporary"
495 del_op_entry
= entry
->change
.flags
& BATADV_TT_CLIENT_DEL
;
496 if (!del_op_requested
&& del_op_entry
)
498 if (del_op_requested
&& !del_op_entry
)
501 /* this is a second add in the same originator interval. It
502 * means that flags have been changed: update them!
504 if (!del_op_requested
&& !del_op_entry
)
505 entry
->change
.flags
= flags
;
509 list_del(&entry
->list
);
510 kmem_cache_free(batadv_tt_change_cache
, entry
);
511 kmem_cache_free(batadv_tt_change_cache
, tt_change_node
);
512 event_removed
= true;
516 /* track the change in the OGMinterval list */
517 list_add_tail(&tt_change_node
->list
, &bat_priv
->tt
.changes_list
);
520 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
523 atomic_dec(&bat_priv
->tt
.local_changes
);
525 atomic_inc(&bat_priv
->tt
.local_changes
);
529 * batadv_tt_len() - compute length in bytes of given number of tt changes
530 * @changes_num: number of tt changes
532 * Return: computed length in bytes.
534 static int batadv_tt_len(int changes_num
)
536 return changes_num
* sizeof(struct batadv_tvlv_tt_change
);
540 * batadv_tt_entries() - compute the number of entries fitting in tt_len bytes
541 * @tt_len: available space
543 * Return: the number of entries.
545 static u16
batadv_tt_entries(u16 tt_len
)
547 return tt_len
/ batadv_tt_len(1);
551 * batadv_tt_local_table_transmit_size() - calculates the local translation
552 * table size when transmitted over the air
553 * @bat_priv: the bat priv with all the soft interface information
555 * Return: local translation table size in bytes.
557 static int batadv_tt_local_table_transmit_size(struct batadv_priv
*bat_priv
)
560 u16 tt_local_entries
= 0;
561 struct batadv_softif_vlan
*vlan
;
565 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
567 tt_local_entries
+= atomic_read(&vlan
->tt
.num_entries
);
571 /* header size of tvlv encapsulated tt response payload */
572 hdr_size
= sizeof(struct batadv_unicast_tvlv_packet
);
573 hdr_size
+= sizeof(struct batadv_tvlv_hdr
);
574 hdr_size
+= sizeof(struct batadv_tvlv_tt_data
);
575 hdr_size
+= num_vlan
* sizeof(struct batadv_tvlv_tt_vlan_data
);
577 return hdr_size
+ batadv_tt_len(tt_local_entries
);
580 static int batadv_tt_local_init(struct batadv_priv
*bat_priv
)
582 if (bat_priv
->tt
.local_hash
)
585 bat_priv
->tt
.local_hash
= batadv_hash_new(1024);
587 if (!bat_priv
->tt
.local_hash
)
590 batadv_hash_set_lock_class(bat_priv
->tt
.local_hash
,
591 &batadv_tt_local_hash_lock_class_key
);
596 static void batadv_tt_global_free(struct batadv_priv
*bat_priv
,
597 struct batadv_tt_global_entry
*tt_global
,
600 struct batadv_tt_global_entry
*tt_removed_entry
;
601 struct hlist_node
*tt_removed_node
;
603 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
604 "Deleting global tt entry %pM (vid: %d): %s\n",
605 tt_global
->common
.addr
,
606 batadv_print_vid(tt_global
->common
.vid
), message
);
608 tt_removed_node
= batadv_hash_remove(bat_priv
->tt
.global_hash
,
612 if (!tt_removed_node
)
615 /* drop reference of remove hash entry */
616 tt_removed_entry
= hlist_entry(tt_removed_node
,
617 struct batadv_tt_global_entry
,
619 batadv_tt_global_entry_put(tt_removed_entry
);
623 * batadv_tt_local_add() - add a new client to the local table or update an
625 * @soft_iface: netdev struct of the mesh interface
626 * @addr: the mac address of the client to add
627 * @vid: VLAN identifier
628 * @ifindex: index of the interface where the client is connected to (useful to
629 * identify wireless clients)
630 * @mark: the value contained in the skb->mark field of the received packet (if
633 * Return: true if the client was successfully added, false otherwise.
635 bool batadv_tt_local_add(struct net_device
*soft_iface
, const u8
*addr
,
636 unsigned short vid
, int ifindex
, u32 mark
)
638 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
639 struct batadv_tt_local_entry
*tt_local
;
640 struct batadv_tt_global_entry
*tt_global
= NULL
;
641 struct net
*net
= dev_net(soft_iface
);
642 struct batadv_softif_vlan
*vlan
;
643 struct net_device
*in_dev
= NULL
;
644 struct batadv_hard_iface
*in_hardif
= NULL
;
645 struct hlist_head
*head
;
646 struct batadv_tt_orig_list_entry
*orig_entry
;
647 int hash_added
, table_size
, packet_size_max
;
649 bool roamed_back
= false;
653 if (ifindex
!= BATADV_NULL_IFINDEX
)
654 in_dev
= dev_get_by_index(net
, ifindex
);
657 in_hardif
= batadv_hardif_get_by_netdev(in_dev
);
659 tt_local
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
661 if (!is_multicast_ether_addr(addr
))
662 tt_global
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
665 tt_local
->last_seen
= jiffies
;
666 if (tt_local
->common
.flags
& BATADV_TT_CLIENT_PENDING
) {
667 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
668 "Re-adding pending client %pM (vid: %d)\n",
669 addr
, batadv_print_vid(vid
));
670 /* whatever the reason why the PENDING flag was set,
671 * this is a client which was enqueued to be removed in
672 * this orig_interval. Since it popped up again, the
673 * flag can be reset like it was never enqueued
675 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_PENDING
;
679 if (tt_local
->common
.flags
& BATADV_TT_CLIENT_ROAM
) {
680 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
681 "Roaming client %pM (vid: %d) came back to its original location\n",
682 addr
, batadv_print_vid(vid
));
683 /* the ROAM flag is set because this client roamed away
684 * and the node got a roaming_advertisement message. Now
685 * that the client popped up again at its original
686 * location such flag can be unset
688 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_ROAM
;
694 /* Ignore the client if we cannot send it in a full table response. */
695 table_size
= batadv_tt_local_table_transmit_size(bat_priv
);
696 table_size
+= batadv_tt_len(1);
697 packet_size_max
= atomic_read(&bat_priv
->packet_size_max
);
698 if (table_size
> packet_size_max
) {
699 net_ratelimited_function(batadv_info
, soft_iface
,
700 "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n",
701 table_size
, packet_size_max
, addr
);
705 tt_local
= kmem_cache_alloc(batadv_tl_cache
, GFP_ATOMIC
);
709 /* increase the refcounter of the related vlan */
710 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
712 net_ratelimited_function(batadv_info
, soft_iface
,
713 "adding TT local entry %pM to non-existent VLAN %d\n",
714 addr
, batadv_print_vid(vid
));
715 kmem_cache_free(batadv_tl_cache
, tt_local
);
720 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
721 "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n",
722 addr
, batadv_print_vid(vid
),
723 (u8
)atomic_read(&bat_priv
->tt
.vn
));
725 ether_addr_copy(tt_local
->common
.addr
, addr
);
726 /* The local entry has to be marked as NEW to avoid to send it in
727 * a full table response going out before the next ttvn increment
728 * (consistency check)
730 tt_local
->common
.flags
= BATADV_TT_CLIENT_NEW
;
731 tt_local
->common
.vid
= vid
;
732 if (batadv_is_wifi_hardif(in_hardif
))
733 tt_local
->common
.flags
|= BATADV_TT_CLIENT_WIFI
;
734 kref_init(&tt_local
->common
.refcount
);
735 tt_local
->last_seen
= jiffies
;
736 tt_local
->common
.added_at
= tt_local
->last_seen
;
737 tt_local
->vlan
= vlan
;
739 /* the batman interface mac and multicast addresses should never be
742 if (batadv_compare_eth(addr
, soft_iface
->dev_addr
) ||
743 is_multicast_ether_addr(addr
))
744 tt_local
->common
.flags
|= BATADV_TT_CLIENT_NOPURGE
;
746 kref_get(&tt_local
->common
.refcount
);
747 hash_added
= batadv_hash_add(bat_priv
->tt
.local_hash
, batadv_compare_tt
,
748 batadv_choose_tt
, &tt_local
->common
,
749 &tt_local
->common
.hash_entry
);
751 if (unlikely(hash_added
!= 0)) {
752 /* remove the reference for the hash */
753 batadv_tt_local_entry_put(tt_local
);
758 batadv_tt_local_event(bat_priv
, tt_local
, BATADV_NO_FLAGS
);
761 /* Check whether it is a roaming, but don't do anything if the roaming
762 * process has already been handled
764 if (tt_global
&& !(tt_global
->common
.flags
& BATADV_TT_CLIENT_ROAM
)) {
765 /* These node are probably going to update their tt table */
766 head
= &tt_global
->orig_list
;
768 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
769 batadv_send_roam_adv(bat_priv
, tt_global
->common
.addr
,
770 tt_global
->common
.vid
,
771 orig_entry
->orig_node
);
775 batadv_tt_global_free(bat_priv
, tt_global
,
779 /* The global entry has to be marked as ROAMING and
780 * has to be kept for consistency purpose
782 tt_global
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
783 tt_global
->roam_at
= jiffies
;
787 /* store the current remote flags before altering them. This helps
788 * understanding is flags are changing or not
790 remote_flags
= tt_local
->common
.flags
& BATADV_TT_REMOTE_MASK
;
792 if (batadv_is_wifi_hardif(in_hardif
))
793 tt_local
->common
.flags
|= BATADV_TT_CLIENT_WIFI
;
795 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_WIFI
;
797 /* check the mark in the skb: if it's equal to the configured
798 * isolation_mark, it means the packet is coming from an isolated
801 match_mark
= (mark
& bat_priv
->isolation_mark_mask
);
802 if (bat_priv
->isolation_mark_mask
&&
803 match_mark
== bat_priv
->isolation_mark
)
804 tt_local
->common
.flags
|= BATADV_TT_CLIENT_ISOLA
;
806 tt_local
->common
.flags
&= ~BATADV_TT_CLIENT_ISOLA
;
808 /* if any "dynamic" flag has been modified, resend an ADD event for this
809 * entry so that all the nodes can get the new flags
811 if (remote_flags
^ (tt_local
->common
.flags
& BATADV_TT_REMOTE_MASK
))
812 batadv_tt_local_event(bat_priv
, tt_local
, BATADV_NO_FLAGS
);
816 batadv_hardif_put(in_hardif
);
818 batadv_tt_local_entry_put(tt_local
);
819 batadv_tt_global_entry_put(tt_global
);
824 * batadv_tt_prepare_tvlv_global_data() - prepare the TVLV TT header to send
825 * within a TT Response directed to another node
826 * @orig_node: originator for which the TT data has to be prepared
827 * @tt_data: uninitialised pointer to the address of the TVLV buffer
828 * @tt_change: uninitialised pointer to the address of the area where the TT
829 * changed can be stored
830 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
831 * function reserves the amount of space needed to send the entire global TT
832 * table. In case of success the value is updated with the real amount of
834 * Allocate the needed amount of memory for the entire TT TVLV and write its
835 * header made up of one tvlv_tt_data object and a series of tvlv_tt_vlan_data
836 * objects, one per active VLAN served by the originator node.
838 * Return: the size of the allocated buffer or 0 in case of failure.
841 batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node
*orig_node
,
842 struct batadv_tvlv_tt_data
**tt_data
,
843 struct batadv_tvlv_tt_change
**tt_change
,
850 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
851 struct batadv_orig_node_vlan
*vlan
;
854 spin_lock_bh(&orig_node
->vlan_list_lock
);
855 hlist_for_each_entry(vlan
, &orig_node
->vlan_list
, list
) {
857 num_entries
+= atomic_read(&vlan
->tt
.num_entries
);
860 change_offset
= sizeof(**tt_data
);
861 change_offset
+= num_vlan
* sizeof(*tt_vlan
);
863 /* if tt_len is negative, allocate the space needed by the full table */
865 *tt_len
= batadv_tt_len(num_entries
);
868 tvlv_len
+= change_offset
;
870 *tt_data
= kmalloc(tvlv_len
, GFP_ATOMIC
);
876 (*tt_data
)->flags
= BATADV_NO_FLAGS
;
877 (*tt_data
)->ttvn
= atomic_read(&orig_node
->last_ttvn
);
878 (*tt_data
)->num_vlan
= htons(num_vlan
);
880 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(*tt_data
+ 1);
881 hlist_for_each_entry(vlan
, &orig_node
->vlan_list
, list
) {
882 tt_vlan
->vid
= htons(vlan
->vid
);
883 tt_vlan
->crc
= htonl(vlan
->tt
.crc
);
884 tt_vlan
->reserved
= 0;
889 tt_change_ptr
= (u8
*)*tt_data
+ change_offset
;
890 *tt_change
= (struct batadv_tvlv_tt_change
*)tt_change_ptr
;
893 spin_unlock_bh(&orig_node
->vlan_list_lock
);
898 * batadv_tt_prepare_tvlv_local_data() - allocate and prepare the TT TVLV for
900 * @bat_priv: the bat priv with all the soft interface information
901 * @tt_data: uninitialised pointer to the address of the TVLV buffer
902 * @tt_change: uninitialised pointer to the address of the area where the TT
903 * changes can be stored
904 * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
905 * function reserves the amount of space needed to send the entire local TT
906 * table. In case of success the value is updated with the real amount of
909 * Allocate the needed amount of memory for the entire TT TVLV and write its
910 * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
911 * objects, one per active VLAN.
913 * Return: the size of the allocated buffer or 0 in case of failure.
916 batadv_tt_prepare_tvlv_local_data(struct batadv_priv
*bat_priv
,
917 struct batadv_tvlv_tt_data
**tt_data
,
918 struct batadv_tvlv_tt_change
**tt_change
,
921 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
922 struct batadv_softif_vlan
*vlan
;
924 u16 vlan_entries
= 0;
925 u16 total_entries
= 0;
930 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
931 hlist_for_each_entry(vlan
, &bat_priv
->softif_vlan_list
, list
) {
932 vlan_entries
= atomic_read(&vlan
->tt
.num_entries
);
933 if (vlan_entries
< 1)
937 total_entries
+= vlan_entries
;
940 change_offset
= sizeof(**tt_data
);
941 change_offset
+= num_vlan
* sizeof(*tt_vlan
);
943 /* if tt_len is negative, allocate the space needed by the full table */
945 *tt_len
= batadv_tt_len(total_entries
);
948 tvlv_len
+= change_offset
;
950 *tt_data
= kmalloc(tvlv_len
, GFP_ATOMIC
);
956 (*tt_data
)->flags
= BATADV_NO_FLAGS
;
957 (*tt_data
)->ttvn
= atomic_read(&bat_priv
->tt
.vn
);
958 (*tt_data
)->num_vlan
= htons(num_vlan
);
960 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(*tt_data
+ 1);
961 hlist_for_each_entry(vlan
, &bat_priv
->softif_vlan_list
, list
) {
962 vlan_entries
= atomic_read(&vlan
->tt
.num_entries
);
963 if (vlan_entries
< 1)
966 tt_vlan
->vid
= htons(vlan
->vid
);
967 tt_vlan
->crc
= htonl(vlan
->tt
.crc
);
968 tt_vlan
->reserved
= 0;
973 tt_change_ptr
= (u8
*)*tt_data
+ change_offset
;
974 *tt_change
= (struct batadv_tvlv_tt_change
*)tt_change_ptr
;
977 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
982 * batadv_tt_tvlv_container_update() - update the translation table tvlv
983 * container after local tt changes have been committed
984 * @bat_priv: the bat priv with all the soft interface information
986 static void batadv_tt_tvlv_container_update(struct batadv_priv
*bat_priv
)
988 struct batadv_tt_change_node
*entry
, *safe
;
989 struct batadv_tvlv_tt_data
*tt_data
;
990 struct batadv_tvlv_tt_change
*tt_change
;
991 int tt_diff_len
, tt_change_len
= 0;
992 int tt_diff_entries_num
= 0;
993 int tt_diff_entries_count
= 0;
996 tt_diff_entries_num
= atomic_read(&bat_priv
->tt
.local_changes
);
997 tt_diff_len
= batadv_tt_len(tt_diff_entries_num
);
999 /* if we have too many changes for one packet don't send any
1000 * and wait for the tt table request which will be fragmented
1002 if (tt_diff_len
> bat_priv
->soft_iface
->mtu
)
1005 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
, &tt_data
,
1006 &tt_change
, &tt_diff_len
);
1010 tt_data
->flags
= BATADV_TT_OGM_DIFF
;
1012 if (tt_diff_len
== 0)
1013 goto container_register
;
1015 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
1016 atomic_set(&bat_priv
->tt
.local_changes
, 0);
1018 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
1020 if (tt_diff_entries_count
< tt_diff_entries_num
) {
1021 memcpy(tt_change
+ tt_diff_entries_count
,
1023 sizeof(struct batadv_tvlv_tt_change
));
1024 tt_diff_entries_count
++;
1026 list_del(&entry
->list
);
1027 kmem_cache_free(batadv_tt_change_cache
, entry
);
1029 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
1031 /* Keep the buffer for possible tt_request */
1032 spin_lock_bh(&bat_priv
->tt
.last_changeset_lock
);
1033 kfree(bat_priv
->tt
.last_changeset
);
1034 bat_priv
->tt
.last_changeset_len
= 0;
1035 bat_priv
->tt
.last_changeset
= NULL
;
1036 tt_change_len
= batadv_tt_len(tt_diff_entries_count
);
1037 /* check whether this new OGM has no changes due to size problems */
1038 if (tt_diff_entries_count
> 0) {
1039 /* if kmalloc() fails we will reply with the full table
1040 * instead of providing the diff
1042 bat_priv
->tt
.last_changeset
= kzalloc(tt_diff_len
, GFP_ATOMIC
);
1043 if (bat_priv
->tt
.last_changeset
) {
1044 memcpy(bat_priv
->tt
.last_changeset
,
1045 tt_change
, tt_change_len
);
1046 bat_priv
->tt
.last_changeset_len
= tt_diff_len
;
1049 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
1052 batadv_tvlv_container_register(bat_priv
, BATADV_TVLV_TT
, 1, tt_data
,
1058 * batadv_tt_local_dump_entry() - Dump one TT local entry into a message
1059 * @msg :Netlink message to dump into
1060 * @portid: Port making netlink request
1061 * @cb: Control block containing additional options
1062 * @bat_priv: The bat priv with all the soft interface information
1063 * @common: tt local & tt global common data
1065 * Return: Error code, or 0 on success
1068 batadv_tt_local_dump_entry(struct sk_buff
*msg
, u32 portid
,
1069 struct netlink_callback
*cb
,
1070 struct batadv_priv
*bat_priv
,
1071 struct batadv_tt_common_entry
*common
)
1074 struct batadv_softif_vlan
*vlan
;
1075 struct batadv_tt_local_entry
*local
;
1076 unsigned int last_seen_msecs
;
1079 local
= container_of(common
, struct batadv_tt_local_entry
, common
);
1080 last_seen_msecs
= jiffies_to_msecs(jiffies
- local
->last_seen
);
1082 vlan
= batadv_softif_vlan_get(bat_priv
, common
->vid
);
1088 batadv_softif_vlan_put(vlan
);
1090 hdr
= genlmsg_put(msg
, portid
, cb
->nlh
->nlmsg_seq
,
1091 &batadv_netlink_family
, NLM_F_MULTI
,
1092 BATADV_CMD_GET_TRANSTABLE_LOCAL
);
1096 genl_dump_check_consistent(cb
, hdr
);
1098 if (nla_put(msg
, BATADV_ATTR_TT_ADDRESS
, ETH_ALEN
, common
->addr
) ||
1099 nla_put_u32(msg
, BATADV_ATTR_TT_CRC32
, crc
) ||
1100 nla_put_u16(msg
, BATADV_ATTR_TT_VID
, common
->vid
) ||
1101 nla_put_u32(msg
, BATADV_ATTR_TT_FLAGS
, common
->flags
))
1102 goto nla_put_failure
;
1104 if (!(common
->flags
& BATADV_TT_CLIENT_NOPURGE
) &&
1105 nla_put_u32(msg
, BATADV_ATTR_LAST_SEEN_MSECS
, last_seen_msecs
))
1106 goto nla_put_failure
;
1108 genlmsg_end(msg
, hdr
);
1112 genlmsg_cancel(msg
, hdr
);
1117 * batadv_tt_local_dump_bucket() - Dump one TT local bucket into a message
1118 * @msg: Netlink message to dump into
1119 * @portid: Port making netlink request
1120 * @cb: Control block containing additional options
1121 * @bat_priv: The bat priv with all the soft interface information
1122 * @hash: hash to dump
1123 * @bucket: bucket index to dump
1124 * @idx_s: Number of entries to skip
1126 * Return: Error code, or 0 on success
1129 batadv_tt_local_dump_bucket(struct sk_buff
*msg
, u32 portid
,
1130 struct netlink_callback
*cb
,
1131 struct batadv_priv
*bat_priv
,
1132 struct batadv_hashtable
*hash
, unsigned int bucket
,
1135 struct batadv_tt_common_entry
*common
;
1138 spin_lock_bh(&hash
->list_locks
[bucket
]);
1139 cb
->seq
= atomic_read(&hash
->generation
) << 1 | 1;
1141 hlist_for_each_entry(common
, &hash
->table
[bucket
], hash_entry
) {
1145 if (batadv_tt_local_dump_entry(msg
, portid
, cb
, bat_priv
,
1147 spin_unlock_bh(&hash
->list_locks
[bucket
]);
1152 spin_unlock_bh(&hash
->list_locks
[bucket
]);
1159 * batadv_tt_local_dump() - Dump TT local entries into a message
1160 * @msg: Netlink message to dump into
1161 * @cb: Parameters from query
1163 * Return: Error code, or 0 on success
1165 int batadv_tt_local_dump(struct sk_buff
*msg
, struct netlink_callback
*cb
)
1167 struct net
*net
= sock_net(cb
->skb
->sk
);
1168 struct net_device
*soft_iface
;
1169 struct batadv_priv
*bat_priv
;
1170 struct batadv_hard_iface
*primary_if
= NULL
;
1171 struct batadv_hashtable
*hash
;
1174 int bucket
= cb
->args
[0];
1175 int idx
= cb
->args
[1];
1176 int portid
= NETLINK_CB(cb
->skb
).portid
;
1178 ifindex
= batadv_netlink_get_ifindex(cb
->nlh
, BATADV_ATTR_MESH_IFINDEX
);
1182 soft_iface
= dev_get_by_index(net
, ifindex
);
1183 if (!soft_iface
|| !batadv_softif_is_valid(soft_iface
)) {
1188 bat_priv
= netdev_priv(soft_iface
);
1190 primary_if
= batadv_primary_if_get_selected(bat_priv
);
1191 if (!primary_if
|| primary_if
->if_status
!= BATADV_IF_ACTIVE
) {
1196 hash
= bat_priv
->tt
.local_hash
;
1198 while (bucket
< hash
->size
) {
1199 if (batadv_tt_local_dump_bucket(msg
, portid
, cb
, bat_priv
,
1200 hash
, bucket
, &idx
))
1209 batadv_hardif_put(primary_if
);
1210 dev_put(soft_iface
);
1212 cb
->args
[0] = bucket
;
1219 batadv_tt_local_set_pending(struct batadv_priv
*bat_priv
,
1220 struct batadv_tt_local_entry
*tt_local_entry
,
1221 u16 flags
, const char *message
)
1223 batadv_tt_local_event(bat_priv
, tt_local_entry
, flags
);
1225 /* The local client has to be marked as "pending to be removed" but has
1226 * to be kept in the table in order to send it in a full table
1227 * response issued before the net ttvn increment (consistency check)
1229 tt_local_entry
->common
.flags
|= BATADV_TT_CLIENT_PENDING
;
1231 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1232 "Local tt entry (%pM, vid: %d) pending to be removed: %s\n",
1233 tt_local_entry
->common
.addr
,
1234 batadv_print_vid(tt_local_entry
->common
.vid
), message
);
1238 * batadv_tt_local_remove() - logically remove an entry from the local table
1239 * @bat_priv: the bat priv with all the soft interface information
1240 * @addr: the MAC address of the client to remove
1241 * @vid: VLAN identifier
1242 * @message: message to append to the log on deletion
1243 * @roaming: true if the deletion is due to a roaming event
1245 * Return: the flags assigned to the local entry before being deleted
1247 u16
batadv_tt_local_remove(struct batadv_priv
*bat_priv
, const u8
*addr
,
1248 unsigned short vid
, const char *message
,
1251 struct batadv_tt_local_entry
*tt_removed_entry
;
1252 struct batadv_tt_local_entry
*tt_local_entry
;
1253 u16 flags
, curr_flags
= BATADV_NO_FLAGS
;
1254 struct hlist_node
*tt_removed_node
;
1256 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
1257 if (!tt_local_entry
)
1260 curr_flags
= tt_local_entry
->common
.flags
;
1262 flags
= BATADV_TT_CLIENT_DEL
;
1263 /* if this global entry addition is due to a roaming, the node has to
1264 * mark the local entry as "roamed" in order to correctly reroute
1268 flags
|= BATADV_TT_CLIENT_ROAM
;
1269 /* mark the local client as ROAMed */
1270 tt_local_entry
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
1273 if (!(tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NEW
)) {
1274 batadv_tt_local_set_pending(bat_priv
, tt_local_entry
, flags
,
1278 /* if this client has been added right now, it is possible to
1279 * immediately purge it
1281 batadv_tt_local_event(bat_priv
, tt_local_entry
, BATADV_TT_CLIENT_DEL
);
1283 tt_removed_node
= batadv_hash_remove(bat_priv
->tt
.local_hash
,
1286 &tt_local_entry
->common
);
1287 if (!tt_removed_node
)
1290 /* drop reference of remove hash entry */
1291 tt_removed_entry
= hlist_entry(tt_removed_node
,
1292 struct batadv_tt_local_entry
,
1294 batadv_tt_local_entry_put(tt_removed_entry
);
1297 batadv_tt_local_entry_put(tt_local_entry
);
1303 * batadv_tt_local_purge_list() - purge inactive tt local entries
1304 * @bat_priv: the bat priv with all the soft interface information
1305 * @head: pointer to the list containing the local tt entries
1306 * @timeout: parameter deciding whether a given tt local entry is considered
1309 static void batadv_tt_local_purge_list(struct batadv_priv
*bat_priv
,
1310 struct hlist_head
*head
,
1313 struct batadv_tt_local_entry
*tt_local_entry
;
1314 struct batadv_tt_common_entry
*tt_common_entry
;
1315 struct hlist_node
*node_tmp
;
1317 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
, head
,
1319 tt_local_entry
= container_of(tt_common_entry
,
1320 struct batadv_tt_local_entry
,
1322 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NOPURGE
)
1325 /* entry already marked for deletion */
1326 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
)
1329 if (!batadv_has_timed_out(tt_local_entry
->last_seen
, timeout
))
1332 batadv_tt_local_set_pending(bat_priv
, tt_local_entry
,
1333 BATADV_TT_CLIENT_DEL
, "timed out");
1338 * batadv_tt_local_purge() - purge inactive tt local entries
1339 * @bat_priv: the bat priv with all the soft interface information
1340 * @timeout: parameter deciding whether a given tt local entry is considered
1343 static void batadv_tt_local_purge(struct batadv_priv
*bat_priv
,
1346 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
1347 struct hlist_head
*head
;
1348 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1351 for (i
= 0; i
< hash
->size
; i
++) {
1352 head
= &hash
->table
[i
];
1353 list_lock
= &hash
->list_locks
[i
];
1355 spin_lock_bh(list_lock
);
1356 batadv_tt_local_purge_list(bat_priv
, head
, timeout
);
1357 spin_unlock_bh(list_lock
);
1361 static void batadv_tt_local_table_free(struct batadv_priv
*bat_priv
)
1363 struct batadv_hashtable
*hash
;
1364 spinlock_t
*list_lock
; /* protects write access to the hash lists */
1365 struct batadv_tt_common_entry
*tt_common_entry
;
1366 struct batadv_tt_local_entry
*tt_local
;
1367 struct hlist_node
*node_tmp
;
1368 struct hlist_head
*head
;
1371 if (!bat_priv
->tt
.local_hash
)
1374 hash
= bat_priv
->tt
.local_hash
;
1376 for (i
= 0; i
< hash
->size
; i
++) {
1377 head
= &hash
->table
[i
];
1378 list_lock
= &hash
->list_locks
[i
];
1380 spin_lock_bh(list_lock
);
1381 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
,
1383 hlist_del_rcu(&tt_common_entry
->hash_entry
);
1384 tt_local
= container_of(tt_common_entry
,
1385 struct batadv_tt_local_entry
,
1388 batadv_tt_local_entry_put(tt_local
);
1390 spin_unlock_bh(list_lock
);
1393 batadv_hash_destroy(hash
);
1395 bat_priv
->tt
.local_hash
= NULL
;
1398 static int batadv_tt_global_init(struct batadv_priv
*bat_priv
)
1400 if (bat_priv
->tt
.global_hash
)
1403 bat_priv
->tt
.global_hash
= batadv_hash_new(1024);
1405 if (!bat_priv
->tt
.global_hash
)
1408 batadv_hash_set_lock_class(bat_priv
->tt
.global_hash
,
1409 &batadv_tt_global_hash_lock_class_key
);
1414 static void batadv_tt_changes_list_free(struct batadv_priv
*bat_priv
)
1416 struct batadv_tt_change_node
*entry
, *safe
;
1418 spin_lock_bh(&bat_priv
->tt
.changes_list_lock
);
1420 list_for_each_entry_safe(entry
, safe
, &bat_priv
->tt
.changes_list
,
1422 list_del(&entry
->list
);
1423 kmem_cache_free(batadv_tt_change_cache
, entry
);
1426 atomic_set(&bat_priv
->tt
.local_changes
, 0);
1427 spin_unlock_bh(&bat_priv
->tt
.changes_list_lock
);
1431 * batadv_tt_global_orig_entry_find() - find a TT orig_list_entry
1432 * @entry: the TT global entry where the orig_list_entry has to be
1434 * @orig_node: the originator for which the orig_list_entry has to be found
1436 * retrieve the orig_tt_list_entry belonging to orig_node from the
1437 * batadv_tt_global_entry list
1439 * Return: it with an increased refcounter, NULL if not found
1441 static struct batadv_tt_orig_list_entry
*
1442 batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry
*entry
,
1443 const struct batadv_orig_node
*orig_node
)
1445 struct batadv_tt_orig_list_entry
*tmp_orig_entry
, *orig_entry
= NULL
;
1446 const struct hlist_head
*head
;
1449 head
= &entry
->orig_list
;
1450 hlist_for_each_entry_rcu(tmp_orig_entry
, head
, list
) {
1451 if (tmp_orig_entry
->orig_node
!= orig_node
)
1453 if (!kref_get_unless_zero(&tmp_orig_entry
->refcount
))
1456 orig_entry
= tmp_orig_entry
;
1465 * batadv_tt_global_entry_has_orig() - check if a TT global entry is also
1466 * handled by a given originator
1467 * @entry: the TT global entry to check
1468 * @orig_node: the originator to search in the list
1469 * @flags: a pointer to store TT flags for the given @entry received
1472 * find out if an orig_node is already in the list of a tt_global_entry.
1474 * Return: true if found, false otherwise
1477 batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry
*entry
,
1478 const struct batadv_orig_node
*orig_node
,
1481 struct batadv_tt_orig_list_entry
*orig_entry
;
1484 orig_entry
= batadv_tt_global_orig_entry_find(entry
, orig_node
);
1489 *flags
= orig_entry
->flags
;
1491 batadv_tt_orig_list_entry_put(orig_entry
);
1498 * batadv_tt_global_sync_flags() - update TT sync flags
1499 * @tt_global: the TT global entry to update sync flags in
1501 * Updates the sync flag bits in the tt_global flag attribute with a logical
1502 * OR of all sync flags from any of its TT orig entries.
1505 batadv_tt_global_sync_flags(struct batadv_tt_global_entry
*tt_global
)
1507 struct batadv_tt_orig_list_entry
*orig_entry
;
1508 const struct hlist_head
*head
;
1509 u16 flags
= BATADV_NO_FLAGS
;
1512 head
= &tt_global
->orig_list
;
1513 hlist_for_each_entry_rcu(orig_entry
, head
, list
)
1514 flags
|= orig_entry
->flags
;
1517 flags
|= tt_global
->common
.flags
& (~BATADV_TT_SYNC_MASK
);
1518 tt_global
->common
.flags
= flags
;
1522 * batadv_tt_global_orig_entry_add() - add or update a TT orig entry
1523 * @tt_global: the TT global entry to add an orig entry in
1524 * @orig_node: the originator to add an orig entry for
1525 * @ttvn: translation table version number of this changeset
1526 * @flags: TT sync flags
1529 batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry
*tt_global
,
1530 struct batadv_orig_node
*orig_node
, int ttvn
,
1533 struct batadv_tt_orig_list_entry
*orig_entry
;
1535 spin_lock_bh(&tt_global
->list_lock
);
1537 orig_entry
= batadv_tt_global_orig_entry_find(tt_global
, orig_node
);
1539 /* refresh the ttvn: the current value could be a bogus one that
1540 * was added during a "temporary client detection"
1542 orig_entry
->ttvn
= ttvn
;
1543 orig_entry
->flags
= flags
;
1547 orig_entry
= kmem_cache_zalloc(batadv_tt_orig_cache
, GFP_ATOMIC
);
1551 INIT_HLIST_NODE(&orig_entry
->list
);
1552 kref_get(&orig_node
->refcount
);
1553 batadv_tt_global_size_inc(orig_node
, tt_global
->common
.vid
);
1554 orig_entry
->orig_node
= orig_node
;
1555 orig_entry
->ttvn
= ttvn
;
1556 orig_entry
->flags
= flags
;
1557 kref_init(&orig_entry
->refcount
);
1559 kref_get(&orig_entry
->refcount
);
1560 hlist_add_head_rcu(&orig_entry
->list
,
1561 &tt_global
->orig_list
);
1562 atomic_inc(&tt_global
->orig_list_count
);
1565 batadv_tt_global_sync_flags(tt_global
);
1567 batadv_tt_orig_list_entry_put(orig_entry
);
1569 spin_unlock_bh(&tt_global
->list_lock
);
1573 * batadv_tt_global_add() - add a new TT global entry or update an existing one
1574 * @bat_priv: the bat priv with all the soft interface information
1575 * @orig_node: the originator announcing the client
1576 * @tt_addr: the mac address of the non-mesh client
1577 * @vid: VLAN identifier
1578 * @flags: TT flags that have to be set for this non-mesh client
1579 * @ttvn: the tt version number ever announcing this non-mesh client
1581 * Add a new TT global entry for the given originator. If the entry already
1582 * exists add a new reference to the given originator (a global entry can have
1583 * references to multiple originators) and adjust the flags attribute to reflect
1584 * the function argument.
1585 * If a TT local entry exists for this non-mesh client remove it.
1587 * The caller must hold the orig_node refcount.
1589 * Return: true if the new entry has been added, false otherwise
1591 static bool batadv_tt_global_add(struct batadv_priv
*bat_priv
,
1592 struct batadv_orig_node
*orig_node
,
1593 const unsigned char *tt_addr
,
1594 unsigned short vid
, u16 flags
, u8 ttvn
)
1596 struct batadv_tt_global_entry
*tt_global_entry
;
1597 struct batadv_tt_local_entry
*tt_local_entry
;
1600 struct batadv_tt_common_entry
*common
;
1603 /* ignore global entries from backbone nodes */
1604 if (batadv_bla_is_backbone_gw_orig(bat_priv
, orig_node
->orig
, vid
))
1607 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, tt_addr
, vid
);
1608 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, tt_addr
, vid
);
1610 /* if the node already has a local client for this entry, it has to wait
1611 * for a roaming advertisement instead of manually messing up the global
1614 if ((flags
& BATADV_TT_CLIENT_TEMP
) && tt_local_entry
&&
1615 !(tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_NEW
))
1618 if (!tt_global_entry
) {
1619 tt_global_entry
= kmem_cache_zalloc(batadv_tg_cache
,
1621 if (!tt_global_entry
)
1624 common
= &tt_global_entry
->common
;
1625 ether_addr_copy(common
->addr
, tt_addr
);
1628 if (!is_multicast_ether_addr(common
->addr
))
1629 common
->flags
= flags
& (~BATADV_TT_SYNC_MASK
);
1631 tt_global_entry
->roam_at
= 0;
1632 /* node must store current time in case of roaming. This is
1633 * needed to purge this entry out on timeout (if nobody claims
1636 if (flags
& BATADV_TT_CLIENT_ROAM
)
1637 tt_global_entry
->roam_at
= jiffies
;
1638 kref_init(&common
->refcount
);
1639 common
->added_at
= jiffies
;
1641 INIT_HLIST_HEAD(&tt_global_entry
->orig_list
);
1642 atomic_set(&tt_global_entry
->orig_list_count
, 0);
1643 spin_lock_init(&tt_global_entry
->list_lock
);
1645 kref_get(&common
->refcount
);
1646 hash_added
= batadv_hash_add(bat_priv
->tt
.global_hash
,
1648 batadv_choose_tt
, common
,
1649 &common
->hash_entry
);
1651 if (unlikely(hash_added
!= 0)) {
1652 /* remove the reference for the hash */
1653 batadv_tt_global_entry_put(tt_global_entry
);
1657 common
= &tt_global_entry
->common
;
1658 /* If there is already a global entry, we can use this one for
1660 * But if we are trying to add a temporary client then here are
1661 * two options at this point:
1662 * 1) the global client is not a temporary client: the global
1663 * client has to be left as it is, temporary information
1664 * should never override any already known client state
1665 * 2) the global client is a temporary client: purge the
1666 * originator list and add the new one orig_entry
1668 if (flags
& BATADV_TT_CLIENT_TEMP
) {
1669 if (!(common
->flags
& BATADV_TT_CLIENT_TEMP
))
1671 if (batadv_tt_global_entry_has_orig(tt_global_entry
,
1674 batadv_tt_global_del_orig_list(tt_global_entry
);
1675 goto add_orig_entry
;
1678 /* if the client was temporary added before receiving the first
1679 * OGM announcing it, we have to clear the TEMP flag. Also,
1680 * remove the previous temporary orig node and re-add it
1681 * if required. If the orig entry changed, the new one which
1682 * is a non-temporary entry is preferred.
1684 if (common
->flags
& BATADV_TT_CLIENT_TEMP
) {
1685 batadv_tt_global_del_orig_list(tt_global_entry
);
1686 common
->flags
&= ~BATADV_TT_CLIENT_TEMP
;
1689 /* the change can carry possible "attribute" flags like the
1690 * TT_CLIENT_TEMP, therefore they have to be copied in the
1693 if (!is_multicast_ether_addr(common
->addr
))
1694 common
->flags
|= flags
& (~BATADV_TT_SYNC_MASK
);
1696 /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only
1697 * one originator left in the list and we previously received a
1698 * delete + roaming change for this originator.
1700 * We should first delete the old originator before adding the
1703 if (common
->flags
& BATADV_TT_CLIENT_ROAM
) {
1704 batadv_tt_global_del_orig_list(tt_global_entry
);
1705 common
->flags
&= ~BATADV_TT_CLIENT_ROAM
;
1706 tt_global_entry
->roam_at
= 0;
1710 /* add the new orig_entry (if needed) or update it */
1711 batadv_tt_global_orig_entry_add(tt_global_entry
, orig_node
, ttvn
,
1712 flags
& BATADV_TT_SYNC_MASK
);
1714 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
1715 "Creating new global tt entry: %pM (vid: %d, via %pM)\n",
1716 common
->addr
, batadv_print_vid(common
->vid
),
1721 /* Do not remove multicast addresses from the local hash on
1724 if (is_multicast_ether_addr(tt_addr
))
1727 /* remove address from local hash if present */
1728 local_flags
= batadv_tt_local_remove(bat_priv
, tt_addr
, vid
,
1729 "global tt received",
1730 flags
& BATADV_TT_CLIENT_ROAM
);
1731 tt_global_entry
->common
.flags
|= local_flags
& BATADV_TT_CLIENT_WIFI
;
1733 if (!(flags
& BATADV_TT_CLIENT_ROAM
))
1734 /* this is a normal global add. Therefore the client is not in a
1735 * roaming state anymore.
1737 tt_global_entry
->common
.flags
&= ~BATADV_TT_CLIENT_ROAM
;
1740 batadv_tt_global_entry_put(tt_global_entry
);
1741 batadv_tt_local_entry_put(tt_local_entry
);
1746 * batadv_transtable_best_orig() - Get best originator list entry from tt entry
1747 * @bat_priv: the bat priv with all the soft interface information
1748 * @tt_global_entry: global translation table entry to be analyzed
1750 * This function assumes the caller holds rcu_read_lock().
1751 * Return: best originator list entry or NULL on errors.
1753 static struct batadv_tt_orig_list_entry
*
1754 batadv_transtable_best_orig(struct batadv_priv
*bat_priv
,
1755 struct batadv_tt_global_entry
*tt_global_entry
)
1757 struct batadv_neigh_node
*router
, *best_router
= NULL
;
1758 struct batadv_algo_ops
*bao
= bat_priv
->algo_ops
;
1759 struct hlist_head
*head
;
1760 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
= NULL
;
1762 head
= &tt_global_entry
->orig_list
;
1763 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1764 router
= batadv_orig_router_get(orig_entry
->orig_node
,
1770 bao
->neigh
.cmp(router
, BATADV_IF_DEFAULT
, best_router
,
1771 BATADV_IF_DEFAULT
) <= 0) {
1772 batadv_neigh_node_put(router
);
1776 /* release the refcount for the "old" best */
1777 batadv_neigh_node_put(best_router
);
1779 best_entry
= orig_entry
;
1780 best_router
= router
;
1783 batadv_neigh_node_put(best_router
);
1789 * batadv_tt_global_dump_subentry() - Dump all TT local entries into a message
1790 * @msg: Netlink message to dump into
1791 * @portid: Port making netlink request
1792 * @seq: Sequence number of netlink message
1793 * @common: tt local & tt global common data
1794 * @orig: Originator node announcing a non-mesh client
1795 * @best: Is the best originator for the TT entry
1797 * Return: Error code, or 0 on success
1800 batadv_tt_global_dump_subentry(struct sk_buff
*msg
, u32 portid
, u32 seq
,
1801 struct batadv_tt_common_entry
*common
,
1802 struct batadv_tt_orig_list_entry
*orig
,
1805 u16 flags
= (common
->flags
& (~BATADV_TT_SYNC_MASK
)) | orig
->flags
;
1807 struct batadv_orig_node_vlan
*vlan
;
1811 vlan
= batadv_orig_node_vlan_get(orig
->orig_node
,
1818 batadv_orig_node_vlan_put(vlan
);
1820 hdr
= genlmsg_put(msg
, portid
, seq
, &batadv_netlink_family
,
1822 BATADV_CMD_GET_TRANSTABLE_GLOBAL
);
1826 last_ttvn
= atomic_read(&orig
->orig_node
->last_ttvn
);
1828 if (nla_put(msg
, BATADV_ATTR_TT_ADDRESS
, ETH_ALEN
, common
->addr
) ||
1829 nla_put(msg
, BATADV_ATTR_ORIG_ADDRESS
, ETH_ALEN
,
1830 orig
->orig_node
->orig
) ||
1831 nla_put_u8(msg
, BATADV_ATTR_TT_TTVN
, orig
->ttvn
) ||
1832 nla_put_u8(msg
, BATADV_ATTR_TT_LAST_TTVN
, last_ttvn
) ||
1833 nla_put_u32(msg
, BATADV_ATTR_TT_CRC32
, crc
) ||
1834 nla_put_u16(msg
, BATADV_ATTR_TT_VID
, common
->vid
) ||
1835 nla_put_u32(msg
, BATADV_ATTR_TT_FLAGS
, flags
))
1836 goto nla_put_failure
;
1838 if (best
&& nla_put_flag(msg
, BATADV_ATTR_FLAG_BEST
))
1839 goto nla_put_failure
;
1841 genlmsg_end(msg
, hdr
);
1845 genlmsg_cancel(msg
, hdr
);
1850 * batadv_tt_global_dump_entry() - Dump one TT global entry into a message
1851 * @msg: Netlink message to dump into
1852 * @portid: Port making netlink request
1853 * @seq: Sequence number of netlink message
1854 * @bat_priv: The bat priv with all the soft interface information
1855 * @common: tt local & tt global common data
1856 * @sub_s: Number of entries to skip
1858 * This function assumes the caller holds rcu_read_lock().
1860 * Return: Error code, or 0 on success
1863 batadv_tt_global_dump_entry(struct sk_buff
*msg
, u32 portid
, u32 seq
,
1864 struct batadv_priv
*bat_priv
,
1865 struct batadv_tt_common_entry
*common
, int *sub_s
)
1867 struct batadv_tt_orig_list_entry
*orig_entry
, *best_entry
;
1868 struct batadv_tt_global_entry
*global
;
1869 struct hlist_head
*head
;
1873 global
= container_of(common
, struct batadv_tt_global_entry
, common
);
1874 best_entry
= batadv_transtable_best_orig(bat_priv
, global
);
1875 head
= &global
->orig_list
;
1877 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
1881 best
= (orig_entry
== best_entry
);
1883 if (batadv_tt_global_dump_subentry(msg
, portid
, seq
, common
,
1884 orig_entry
, best
)) {
1895 * batadv_tt_global_dump_bucket() - Dump one TT local bucket into a message
1896 * @msg: Netlink message to dump into
1897 * @portid: Port making netlink request
1898 * @seq: Sequence number of netlink message
1899 * @bat_priv: The bat priv with all the soft interface information
1900 * @head: Pointer to the list containing the global tt entries
1901 * @idx_s: Number of entries to skip
1902 * @sub: Number of entries to skip
1904 * Return: Error code, or 0 on success
1907 batadv_tt_global_dump_bucket(struct sk_buff
*msg
, u32 portid
, u32 seq
,
1908 struct batadv_priv
*bat_priv
,
1909 struct hlist_head
*head
, int *idx_s
, int *sub
)
1911 struct batadv_tt_common_entry
*common
;
1915 hlist_for_each_entry_rcu(common
, head
, hash_entry
) {
1919 if (batadv_tt_global_dump_entry(msg
, portid
, seq
, bat_priv
,
1934 * batadv_tt_global_dump() - Dump TT global entries into a message
1935 * @msg: Netlink message to dump into
1936 * @cb: Parameters from query
1938 * Return: Error code, or length of message on success
1940 int batadv_tt_global_dump(struct sk_buff
*msg
, struct netlink_callback
*cb
)
1942 struct net
*net
= sock_net(cb
->skb
->sk
);
1943 struct net_device
*soft_iface
;
1944 struct batadv_priv
*bat_priv
;
1945 struct batadv_hard_iface
*primary_if
= NULL
;
1946 struct batadv_hashtable
*hash
;
1947 struct hlist_head
*head
;
1950 int bucket
= cb
->args
[0];
1951 int idx
= cb
->args
[1];
1952 int sub
= cb
->args
[2];
1953 int portid
= NETLINK_CB(cb
->skb
).portid
;
1955 ifindex
= batadv_netlink_get_ifindex(cb
->nlh
, BATADV_ATTR_MESH_IFINDEX
);
1959 soft_iface
= dev_get_by_index(net
, ifindex
);
1960 if (!soft_iface
|| !batadv_softif_is_valid(soft_iface
)) {
1965 bat_priv
= netdev_priv(soft_iface
);
1967 primary_if
= batadv_primary_if_get_selected(bat_priv
);
1968 if (!primary_if
|| primary_if
->if_status
!= BATADV_IF_ACTIVE
) {
1973 hash
= bat_priv
->tt
.global_hash
;
1975 while (bucket
< hash
->size
) {
1976 head
= &hash
->table
[bucket
];
1978 if (batadv_tt_global_dump_bucket(msg
, portid
,
1979 cb
->nlh
->nlmsg_seq
, bat_priv
,
1989 batadv_hardif_put(primary_if
);
1990 dev_put(soft_iface
);
1992 cb
->args
[0] = bucket
;
2000 * _batadv_tt_global_del_orig_entry() - remove and free an orig_entry
2001 * @tt_global_entry: the global entry to remove the orig_entry from
2002 * @orig_entry: the orig entry to remove and free
2004 * Remove an orig_entry from its list in the given tt_global_entry and
2005 * free this orig_entry afterwards.
2007 * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is
2011 _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry
*tt_global_entry
,
2012 struct batadv_tt_orig_list_entry
*orig_entry
)
2014 lockdep_assert_held(&tt_global_entry
->list_lock
);
2016 batadv_tt_global_size_dec(orig_entry
->orig_node
,
2017 tt_global_entry
->common
.vid
);
2018 atomic_dec(&tt_global_entry
->orig_list_count
);
2019 /* requires holding tt_global_entry->list_lock and orig_entry->list
2020 * being part of a list
2022 hlist_del_rcu(&orig_entry
->list
);
2023 batadv_tt_orig_list_entry_put(orig_entry
);
2026 /* deletes the orig list of a tt_global_entry */
2028 batadv_tt_global_del_orig_list(struct batadv_tt_global_entry
*tt_global_entry
)
2030 struct hlist_head
*head
;
2031 struct hlist_node
*safe
;
2032 struct batadv_tt_orig_list_entry
*orig_entry
;
2034 spin_lock_bh(&tt_global_entry
->list_lock
);
2035 head
= &tt_global_entry
->orig_list
;
2036 hlist_for_each_entry_safe(orig_entry
, safe
, head
, list
)
2037 _batadv_tt_global_del_orig_entry(tt_global_entry
, orig_entry
);
2038 spin_unlock_bh(&tt_global_entry
->list_lock
);
2042 * batadv_tt_global_del_orig_node() - remove orig_node from a global tt entry
2043 * @bat_priv: the bat priv with all the soft interface information
2044 * @tt_global_entry: the global entry to remove the orig_node from
2045 * @orig_node: the originator announcing the client
2046 * @message: message to append to the log on deletion
2048 * Remove the given orig_node and its according orig_entry from the given
2052 batadv_tt_global_del_orig_node(struct batadv_priv
*bat_priv
,
2053 struct batadv_tt_global_entry
*tt_global_entry
,
2054 struct batadv_orig_node
*orig_node
,
2055 const char *message
)
2057 struct hlist_head
*head
;
2058 struct hlist_node
*safe
;
2059 struct batadv_tt_orig_list_entry
*orig_entry
;
2062 spin_lock_bh(&tt_global_entry
->list_lock
);
2063 head
= &tt_global_entry
->orig_list
;
2064 hlist_for_each_entry_safe(orig_entry
, safe
, head
, list
) {
2065 if (orig_entry
->orig_node
== orig_node
) {
2066 vid
= tt_global_entry
->common
.vid
;
2067 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2068 "Deleting %pM from global tt entry %pM (vid: %d): %s\n",
2070 tt_global_entry
->common
.addr
,
2071 batadv_print_vid(vid
), message
);
2072 _batadv_tt_global_del_orig_entry(tt_global_entry
,
2076 spin_unlock_bh(&tt_global_entry
->list_lock
);
2079 /* If the client is to be deleted, we check if it is the last origantor entry
2080 * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the
2081 * timer, otherwise we simply remove the originator scheduled for deletion.
2084 batadv_tt_global_del_roaming(struct batadv_priv
*bat_priv
,
2085 struct batadv_tt_global_entry
*tt_global_entry
,
2086 struct batadv_orig_node
*orig_node
,
2087 const char *message
)
2089 bool last_entry
= true;
2090 struct hlist_head
*head
;
2091 struct batadv_tt_orig_list_entry
*orig_entry
;
2093 /* no local entry exists, case 1:
2094 * Check if this is the last one or if other entries exist.
2098 head
= &tt_global_entry
->orig_list
;
2099 hlist_for_each_entry_rcu(orig_entry
, head
, list
) {
2100 if (orig_entry
->orig_node
!= orig_node
) {
2108 /* its the last one, mark for roaming. */
2109 tt_global_entry
->common
.flags
|= BATADV_TT_CLIENT_ROAM
;
2110 tt_global_entry
->roam_at
= jiffies
;
2112 /* there is another entry, we can simply delete this
2113 * one and can still use the other one.
2115 batadv_tt_global_del_orig_node(bat_priv
, tt_global_entry
,
2116 orig_node
, message
);
2121 * batadv_tt_global_del() - remove a client from the global table
2122 * @bat_priv: the bat priv with all the soft interface information
2123 * @orig_node: an originator serving this client
2124 * @addr: the mac address of the client
2125 * @vid: VLAN identifier
2126 * @message: a message explaining the reason for deleting the client to print
2127 * for debugging purpose
2128 * @roaming: true if the deletion has been triggered by a roaming event
2130 static void batadv_tt_global_del(struct batadv_priv
*bat_priv
,
2131 struct batadv_orig_node
*orig_node
,
2132 const unsigned char *addr
, unsigned short vid
,
2133 const char *message
, bool roaming
)
2135 struct batadv_tt_global_entry
*tt_global_entry
;
2136 struct batadv_tt_local_entry
*local_entry
= NULL
;
2138 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
2139 if (!tt_global_entry
)
2143 batadv_tt_global_del_orig_node(bat_priv
, tt_global_entry
,
2144 orig_node
, message
);
2146 if (hlist_empty(&tt_global_entry
->orig_list
))
2147 batadv_tt_global_free(bat_priv
, tt_global_entry
,
2153 /* if we are deleting a global entry due to a roam
2154 * event, there are two possibilities:
2155 * 1) the client roamed from node A to node B => if there
2156 * is only one originator left for this client, we mark
2157 * it with BATADV_TT_CLIENT_ROAM, we start a timer and we
2158 * wait for node B to claim it. In case of timeout
2159 * the entry is purged.
2161 * If there are other originators left, we directly delete
2163 * 2) the client roamed to us => we can directly delete
2164 * the global entry, since it is useless now.
2166 local_entry
= batadv_tt_local_hash_find(bat_priv
,
2167 tt_global_entry
->common
.addr
,
2170 /* local entry exists, case 2: client roamed to us. */
2171 batadv_tt_global_del_orig_list(tt_global_entry
);
2172 batadv_tt_global_free(bat_priv
, tt_global_entry
, message
);
2174 /* no local entry exists, case 1: check for roaming */
2175 batadv_tt_global_del_roaming(bat_priv
, tt_global_entry
,
2176 orig_node
, message
);
2180 batadv_tt_global_entry_put(tt_global_entry
);
2181 batadv_tt_local_entry_put(local_entry
);
2185 * batadv_tt_global_del_orig() - remove all the TT global entries belonging to
2186 * the given originator matching the provided vid
2187 * @bat_priv: the bat priv with all the soft interface information
2188 * @orig_node: the originator owning the entries to remove
2189 * @match_vid: the VLAN identifier to match. If negative all the entries will be
2191 * @message: debug message to print as "reason"
2193 void batadv_tt_global_del_orig(struct batadv_priv
*bat_priv
,
2194 struct batadv_orig_node
*orig_node
,
2196 const char *message
)
2198 struct batadv_tt_global_entry
*tt_global
;
2199 struct batadv_tt_common_entry
*tt_common_entry
;
2201 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
2202 struct hlist_node
*safe
;
2203 struct hlist_head
*head
;
2204 spinlock_t
*list_lock
; /* protects write access to the hash lists */
2210 for (i
= 0; i
< hash
->size
; i
++) {
2211 head
= &hash
->table
[i
];
2212 list_lock
= &hash
->list_locks
[i
];
2214 spin_lock_bh(list_lock
);
2215 hlist_for_each_entry_safe(tt_common_entry
, safe
,
2217 /* remove only matching entries */
2218 if (match_vid
>= 0 && tt_common_entry
->vid
!= match_vid
)
2221 tt_global
= container_of(tt_common_entry
,
2222 struct batadv_tt_global_entry
,
2225 batadv_tt_global_del_orig_node(bat_priv
, tt_global
,
2226 orig_node
, message
);
2228 if (hlist_empty(&tt_global
->orig_list
)) {
2229 vid
= tt_global
->common
.vid
;
2230 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2231 "Deleting global tt entry %pM (vid: %d): %s\n",
2232 tt_global
->common
.addr
,
2233 batadv_print_vid(vid
), message
);
2234 hlist_del_rcu(&tt_common_entry
->hash_entry
);
2235 batadv_tt_global_entry_put(tt_global
);
2238 spin_unlock_bh(list_lock
);
2240 clear_bit(BATADV_ORIG_CAPA_HAS_TT
, &orig_node
->capa_initialized
);
2243 static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry
*tt_global
,
2247 unsigned long roam_timeout
= BATADV_TT_CLIENT_ROAM_TIMEOUT
;
2248 unsigned long temp_timeout
= BATADV_TT_CLIENT_TEMP_TIMEOUT
;
2250 if ((tt_global
->common
.flags
& BATADV_TT_CLIENT_ROAM
) &&
2251 batadv_has_timed_out(tt_global
->roam_at
, roam_timeout
)) {
2253 *msg
= "Roaming timeout\n";
2256 if ((tt_global
->common
.flags
& BATADV_TT_CLIENT_TEMP
) &&
2257 batadv_has_timed_out(tt_global
->common
.added_at
, temp_timeout
)) {
2259 *msg
= "Temporary client timeout\n";
2265 static void batadv_tt_global_purge(struct batadv_priv
*bat_priv
)
2267 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
2268 struct hlist_head
*head
;
2269 struct hlist_node
*node_tmp
;
2270 spinlock_t
*list_lock
; /* protects write access to the hash lists */
2273 struct batadv_tt_common_entry
*tt_common
;
2274 struct batadv_tt_global_entry
*tt_global
;
2276 for (i
= 0; i
< hash
->size
; i
++) {
2277 head
= &hash
->table
[i
];
2278 list_lock
= &hash
->list_locks
[i
];
2280 spin_lock_bh(list_lock
);
2281 hlist_for_each_entry_safe(tt_common
, node_tmp
, head
,
2283 tt_global
= container_of(tt_common
,
2284 struct batadv_tt_global_entry
,
2287 if (!batadv_tt_global_to_purge(tt_global
, &msg
))
2290 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
2291 "Deleting global tt entry %pM (vid: %d): %s\n",
2292 tt_global
->common
.addr
,
2293 batadv_print_vid(tt_global
->common
.vid
),
2296 hlist_del_rcu(&tt_common
->hash_entry
);
2298 batadv_tt_global_entry_put(tt_global
);
2300 spin_unlock_bh(list_lock
);
2304 static void batadv_tt_global_table_free(struct batadv_priv
*bat_priv
)
2306 struct batadv_hashtable
*hash
;
2307 spinlock_t
*list_lock
; /* protects write access to the hash lists */
2308 struct batadv_tt_common_entry
*tt_common_entry
;
2309 struct batadv_tt_global_entry
*tt_global
;
2310 struct hlist_node
*node_tmp
;
2311 struct hlist_head
*head
;
2314 if (!bat_priv
->tt
.global_hash
)
2317 hash
= bat_priv
->tt
.global_hash
;
2319 for (i
= 0; i
< hash
->size
; i
++) {
2320 head
= &hash
->table
[i
];
2321 list_lock
= &hash
->list_locks
[i
];
2323 spin_lock_bh(list_lock
);
2324 hlist_for_each_entry_safe(tt_common_entry
, node_tmp
,
2326 hlist_del_rcu(&tt_common_entry
->hash_entry
);
2327 tt_global
= container_of(tt_common_entry
,
2328 struct batadv_tt_global_entry
,
2330 batadv_tt_global_entry_put(tt_global
);
2332 spin_unlock_bh(list_lock
);
2335 batadv_hash_destroy(hash
);
2337 bat_priv
->tt
.global_hash
= NULL
;
2341 _batadv_is_ap_isolated(struct batadv_tt_local_entry
*tt_local_entry
,
2342 struct batadv_tt_global_entry
*tt_global_entry
)
2344 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_WIFI
&&
2345 tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_WIFI
)
2348 /* check if the two clients are marked as isolated */
2349 if (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ISOLA
&&
2350 tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_ISOLA
)
2357 * batadv_transtable_search() - get the mesh destination for a given client
2358 * @bat_priv: the bat priv with all the soft interface information
2359 * @src: mac address of the source client
2360 * @addr: mac address of the destination client
2361 * @vid: VLAN identifier
2363 * Return: a pointer to the originator that was selected as destination in the
2364 * mesh for contacting the client 'addr', NULL otherwise.
2365 * In case of multiple originators serving the same client, the function returns
2366 * the best one (best in terms of metric towards the destination node).
2368 * If the two clients are AP isolated the function returns NULL.
2370 struct batadv_orig_node
*batadv_transtable_search(struct batadv_priv
*bat_priv
,
2375 struct batadv_tt_local_entry
*tt_local_entry
= NULL
;
2376 struct batadv_tt_global_entry
*tt_global_entry
= NULL
;
2377 struct batadv_orig_node
*orig_node
= NULL
;
2378 struct batadv_tt_orig_list_entry
*best_entry
;
2380 if (src
&& batadv_vlan_ap_isola_get(bat_priv
, vid
)) {
2381 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, src
, vid
);
2382 if (!tt_local_entry
||
2383 (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
))
2387 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
2388 if (!tt_global_entry
)
2391 /* check whether the clients should not communicate due to AP
2394 if (tt_local_entry
&&
2395 _batadv_is_ap_isolated(tt_local_entry
, tt_global_entry
))
2399 best_entry
= batadv_transtable_best_orig(bat_priv
, tt_global_entry
);
2400 /* found anything? */
2402 orig_node
= best_entry
->orig_node
;
2403 if (orig_node
&& !kref_get_unless_zero(&orig_node
->refcount
))
2408 batadv_tt_global_entry_put(tt_global_entry
);
2409 batadv_tt_local_entry_put(tt_local_entry
);
2415 * batadv_tt_global_crc() - calculates the checksum of the local table belonging
2416 * to the given orig_node
2417 * @bat_priv: the bat priv with all the soft interface information
2418 * @orig_node: originator for which the CRC should be computed
2419 * @vid: VLAN identifier for which the CRC32 has to be computed
2421 * This function computes the checksum for the global table corresponding to a
2422 * specific originator. In particular, the checksum is computed as follows: For
2423 * each client connected to the originator the CRC32C of the MAC address and the
2424 * VID is computed and then all the CRC32Cs of the various clients are xor'ed
2427 * The idea behind is that CRC32C should be used as much as possible in order to
2428 * produce a unique hash of the table, but since the order which is used to feed
2429 * the CRC32C function affects the result and since every node in the network
2430 * probably sorts the clients differently, the hash function cannot be directly
2431 * computed over the entire table. Hence the CRC32C is used only on
2432 * the single client entry, while all the results are then xor'ed together
2433 * because the XOR operation can combine them all while trying to reduce the
2434 * noise as much as possible.
2436 * Return: the checksum of the global table of a given originator.
2438 static u32
batadv_tt_global_crc(struct batadv_priv
*bat_priv
,
2439 struct batadv_orig_node
*orig_node
,
2442 struct batadv_hashtable
*hash
= bat_priv
->tt
.global_hash
;
2443 struct batadv_tt_orig_list_entry
*tt_orig
;
2444 struct batadv_tt_common_entry
*tt_common
;
2445 struct batadv_tt_global_entry
*tt_global
;
2446 struct hlist_head
*head
;
2447 u32 i
, crc_tmp
, crc
= 0;
2451 for (i
= 0; i
< hash
->size
; i
++) {
2452 head
= &hash
->table
[i
];
2455 hlist_for_each_entry_rcu(tt_common
, head
, hash_entry
) {
2456 tt_global
= container_of(tt_common
,
2457 struct batadv_tt_global_entry
,
2459 /* compute the CRC only for entries belonging to the
2460 * VLAN identified by the vid passed as parameter
2462 if (tt_common
->vid
!= vid
)
2465 /* Roaming clients are in the global table for
2466 * consistency only. They don't have to be
2467 * taken into account while computing the
2470 if (tt_common
->flags
& BATADV_TT_CLIENT_ROAM
)
2472 /* Temporary clients have not been announced yet, so
2473 * they have to be skipped while computing the global
2476 if (tt_common
->flags
& BATADV_TT_CLIENT_TEMP
)
2479 /* find out if this global entry is announced by this
2482 tt_orig
= batadv_tt_global_orig_entry_find(tt_global
,
2487 /* use network order to read the VID: this ensures that
2488 * every node reads the bytes in the same order.
2490 tmp_vid
= htons(tt_common
->vid
);
2491 crc_tmp
= crc32c(0, &tmp_vid
, sizeof(tmp_vid
));
2493 /* compute the CRC on flags that have to be kept in sync
2496 flags
= tt_orig
->flags
;
2497 crc_tmp
= crc32c(crc_tmp
, &flags
, sizeof(flags
));
2499 crc
^= crc32c(crc_tmp
, tt_common
->addr
, ETH_ALEN
);
2501 batadv_tt_orig_list_entry_put(tt_orig
);
2510 * batadv_tt_local_crc() - calculates the checksum of the local table
2511 * @bat_priv: the bat priv with all the soft interface information
2512 * @vid: VLAN identifier for which the CRC32 has to be computed
2514 * For details about the computation, please refer to the documentation for
2515 * batadv_tt_global_crc().
2517 * Return: the checksum of the local table
2519 static u32
batadv_tt_local_crc(struct batadv_priv
*bat_priv
,
2522 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
2523 struct batadv_tt_common_entry
*tt_common
;
2524 struct hlist_head
*head
;
2525 u32 i
, crc_tmp
, crc
= 0;
2529 for (i
= 0; i
< hash
->size
; i
++) {
2530 head
= &hash
->table
[i
];
2533 hlist_for_each_entry_rcu(tt_common
, head
, hash_entry
) {
2534 /* compute the CRC only for entries belonging to the
2535 * VLAN identified by vid
2537 if (tt_common
->vid
!= vid
)
2540 /* not yet committed clients have not to be taken into
2541 * account while computing the CRC
2543 if (tt_common
->flags
& BATADV_TT_CLIENT_NEW
)
2546 /* use network order to read the VID: this ensures that
2547 * every node reads the bytes in the same order.
2549 tmp_vid
= htons(tt_common
->vid
);
2550 crc_tmp
= crc32c(0, &tmp_vid
, sizeof(tmp_vid
));
2552 /* compute the CRC on flags that have to be kept in sync
2555 flags
= tt_common
->flags
& BATADV_TT_SYNC_MASK
;
2556 crc_tmp
= crc32c(crc_tmp
, &flags
, sizeof(flags
));
2558 crc
^= crc32c(crc_tmp
, tt_common
->addr
, ETH_ALEN
);
2567 * batadv_tt_req_node_release() - free tt_req node entry
2568 * @ref: kref pointer of the tt req_node entry
2570 static void batadv_tt_req_node_release(struct kref
*ref
)
2572 struct batadv_tt_req_node
*tt_req_node
;
2574 tt_req_node
= container_of(ref
, struct batadv_tt_req_node
, refcount
);
2576 kmem_cache_free(batadv_tt_req_cache
, tt_req_node
);
2580 * batadv_tt_req_node_put() - decrement the tt_req_node refcounter and
2581 * possibly release it
2582 * @tt_req_node: tt_req_node to be free'd
2584 static void batadv_tt_req_node_put(struct batadv_tt_req_node
*tt_req_node
)
2589 kref_put(&tt_req_node
->refcount
, batadv_tt_req_node_release
);
2592 static void batadv_tt_req_list_free(struct batadv_priv
*bat_priv
)
2594 struct batadv_tt_req_node
*node
;
2595 struct hlist_node
*safe
;
2597 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2599 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
2600 hlist_del_init(&node
->list
);
2601 batadv_tt_req_node_put(node
);
2604 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2607 static void batadv_tt_save_orig_buffer(struct batadv_priv
*bat_priv
,
2608 struct batadv_orig_node
*orig_node
,
2609 const void *tt_buff
,
2612 /* Replace the old buffer only if I received something in the
2613 * last OGM (the OGM could carry no changes)
2615 spin_lock_bh(&orig_node
->tt_buff_lock
);
2616 if (tt_buff_len
> 0) {
2617 kfree(orig_node
->tt_buff
);
2618 orig_node
->tt_buff_len
= 0;
2619 orig_node
->tt_buff
= kmalloc(tt_buff_len
, GFP_ATOMIC
);
2620 if (orig_node
->tt_buff
) {
2621 memcpy(orig_node
->tt_buff
, tt_buff
, tt_buff_len
);
2622 orig_node
->tt_buff_len
= tt_buff_len
;
2625 spin_unlock_bh(&orig_node
->tt_buff_lock
);
2628 static void batadv_tt_req_purge(struct batadv_priv
*bat_priv
)
2630 struct batadv_tt_req_node
*node
;
2631 struct hlist_node
*safe
;
2633 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2634 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
2635 if (batadv_has_timed_out(node
->issued_at
,
2636 BATADV_TT_REQUEST_TIMEOUT
)) {
2637 hlist_del_init(&node
->list
);
2638 batadv_tt_req_node_put(node
);
2641 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2645 * batadv_tt_req_node_new() - search and possibly create a tt_req_node object
2646 * @bat_priv: the bat priv with all the soft interface information
2647 * @orig_node: orig node this request is being issued for
2649 * Return: the pointer to the new tt_req_node struct if no request
2650 * has already been issued for this orig_node, NULL otherwise.
2652 static struct batadv_tt_req_node
*
2653 batadv_tt_req_node_new(struct batadv_priv
*bat_priv
,
2654 struct batadv_orig_node
*orig_node
)
2656 struct batadv_tt_req_node
*tt_req_node_tmp
, *tt_req_node
= NULL
;
2658 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2659 hlist_for_each_entry(tt_req_node_tmp
, &bat_priv
->tt
.req_list
, list
) {
2660 if (batadv_compare_eth(tt_req_node_tmp
, orig_node
) &&
2661 !batadv_has_timed_out(tt_req_node_tmp
->issued_at
,
2662 BATADV_TT_REQUEST_TIMEOUT
))
2666 tt_req_node
= kmem_cache_alloc(batadv_tt_req_cache
, GFP_ATOMIC
);
2670 kref_init(&tt_req_node
->refcount
);
2671 ether_addr_copy(tt_req_node
->addr
, orig_node
->orig
);
2672 tt_req_node
->issued_at
= jiffies
;
2674 kref_get(&tt_req_node
->refcount
);
2675 hlist_add_head(&tt_req_node
->list
, &bat_priv
->tt
.req_list
);
2677 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2682 * batadv_tt_local_valid() - verify local tt entry and get flags
2683 * @entry_ptr: to be checked local tt entry
2684 * @data_ptr: not used but definition required to satisfy the callback prototype
2685 * @flags: a pointer to store TT flags for this client to
2687 * Checks the validity of the given local TT entry. If it is, then the provided
2688 * flags pointer is updated.
2690 * Return: true if the entry is a valid, false otherwise.
2692 static bool batadv_tt_local_valid(const void *entry_ptr
,
2693 const void *data_ptr
,
2696 const struct batadv_tt_common_entry
*tt_common_entry
= entry_ptr
;
2698 if (tt_common_entry
->flags
& BATADV_TT_CLIENT_NEW
)
2702 *flags
= tt_common_entry
->flags
;
2708 * batadv_tt_global_valid() - verify global tt entry and get flags
2709 * @entry_ptr: to be checked global tt entry
2710 * @data_ptr: an orig_node object (may be NULL)
2711 * @flags: a pointer to store TT flags for this client to
2713 * Checks the validity of the given global TT entry. If it is, then the provided
2714 * flags pointer is updated either with the common (summed) TT flags if data_ptr
2715 * is NULL or the specific, per originator TT flags otherwise.
2717 * Return: true if the entry is a valid, false otherwise.
2719 static bool batadv_tt_global_valid(const void *entry_ptr
,
2720 const void *data_ptr
,
2723 const struct batadv_tt_common_entry
*tt_common_entry
= entry_ptr
;
2724 const struct batadv_tt_global_entry
*tt_global_entry
;
2725 const struct batadv_orig_node
*orig_node
= data_ptr
;
2727 if (tt_common_entry
->flags
& BATADV_TT_CLIENT_ROAM
||
2728 tt_common_entry
->flags
& BATADV_TT_CLIENT_TEMP
)
2731 tt_global_entry
= container_of(tt_common_entry
,
2732 struct batadv_tt_global_entry
,
2735 return batadv_tt_global_entry_has_orig(tt_global_entry
, orig_node
,
2740 * batadv_tt_tvlv_generate() - fill the tvlv buff with the tt entries from the
2742 * @bat_priv: the bat priv with all the soft interface information
2743 * @hash: hash table containing the tt entries
2744 * @tt_len: expected tvlv tt data buffer length in number of bytes
2745 * @tvlv_buff: pointer to the buffer to fill with the TT data
2746 * @valid_cb: function to filter tt change entries and to return TT flags
2747 * @cb_data: data passed to the filter function as argument
2749 * Fills the tvlv buff with the tt entries from the specified hash. If valid_cb
2750 * is not provided then this becomes a no-op.
2752 static void batadv_tt_tvlv_generate(struct batadv_priv
*bat_priv
,
2753 struct batadv_hashtable
*hash
,
2754 void *tvlv_buff
, u16 tt_len
,
2755 bool (*valid_cb
)(const void *,
2760 struct batadv_tt_common_entry
*tt_common_entry
;
2761 struct batadv_tvlv_tt_change
*tt_change
;
2762 struct hlist_head
*head
;
2763 u16 tt_tot
, tt_num_entries
= 0;
2768 tt_tot
= batadv_tt_entries(tt_len
);
2769 tt_change
= (struct batadv_tvlv_tt_change
*)tvlv_buff
;
2775 for (i
= 0; i
< hash
->size
; i
++) {
2776 head
= &hash
->table
[i
];
2778 hlist_for_each_entry_rcu(tt_common_entry
,
2780 if (tt_tot
== tt_num_entries
)
2783 ret
= valid_cb(tt_common_entry
, cb_data
, &flags
);
2787 ether_addr_copy(tt_change
->addr
, tt_common_entry
->addr
);
2788 tt_change
->flags
= flags
;
2789 tt_change
->vid
= htons(tt_common_entry
->vid
);
2790 memset(tt_change
->reserved
, 0,
2791 sizeof(tt_change
->reserved
));
2801 * batadv_tt_global_check_crc() - check if all the CRCs are correct
2802 * @orig_node: originator for which the CRCs have to be checked
2803 * @tt_vlan: pointer to the first tvlv VLAN entry
2804 * @num_vlan: number of tvlv VLAN entries
2806 * Return: true if all the received CRCs match the locally stored ones, false
2809 static bool batadv_tt_global_check_crc(struct batadv_orig_node
*orig_node
,
2810 struct batadv_tvlv_tt_vlan_data
*tt_vlan
,
2813 struct batadv_tvlv_tt_vlan_data
*tt_vlan_tmp
;
2814 struct batadv_orig_node_vlan
*vlan
;
2815 int i
, orig_num_vlan
;
2818 /* check if each received CRC matches the locally stored one */
2819 for (i
= 0; i
< num_vlan
; i
++) {
2820 tt_vlan_tmp
= tt_vlan
+ i
;
2822 /* if orig_node is a backbone node for this VLAN, don't check
2823 * the CRC as we ignore all the global entries over it
2825 if (batadv_bla_is_backbone_gw_orig(orig_node
->bat_priv
,
2827 ntohs(tt_vlan_tmp
->vid
)))
2830 vlan
= batadv_orig_node_vlan_get(orig_node
,
2831 ntohs(tt_vlan_tmp
->vid
));
2836 batadv_orig_node_vlan_put(vlan
);
2838 if (crc
!= ntohl(tt_vlan_tmp
->crc
))
2842 /* check if any excess VLANs exist locally for the originator
2843 * which are not mentioned in the TVLV from the originator.
2847 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
)
2851 if (orig_num_vlan
> num_vlan
)
2858 * batadv_tt_local_update_crc() - update all the local CRCs
2859 * @bat_priv: the bat priv with all the soft interface information
2861 static void batadv_tt_local_update_crc(struct batadv_priv
*bat_priv
)
2863 struct batadv_softif_vlan
*vlan
;
2865 /* recompute the global CRC for each VLAN */
2867 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
2868 vlan
->tt
.crc
= batadv_tt_local_crc(bat_priv
, vlan
->vid
);
2874 * batadv_tt_global_update_crc() - update all the global CRCs for this orig_node
2875 * @bat_priv: the bat priv with all the soft interface information
2876 * @orig_node: the orig_node for which the CRCs have to be updated
2878 static void batadv_tt_global_update_crc(struct batadv_priv
*bat_priv
,
2879 struct batadv_orig_node
*orig_node
)
2881 struct batadv_orig_node_vlan
*vlan
;
2884 /* recompute the global CRC for each VLAN */
2886 hlist_for_each_entry_rcu(vlan
, &orig_node
->vlan_list
, list
) {
2887 /* if orig_node is a backbone node for this VLAN, don't compute
2888 * the CRC as we ignore all the global entries over it
2890 if (batadv_bla_is_backbone_gw_orig(bat_priv
, orig_node
->orig
,
2894 crc
= batadv_tt_global_crc(bat_priv
, orig_node
, vlan
->vid
);
2901 * batadv_send_tt_request() - send a TT Request message to a given node
2902 * @bat_priv: the bat priv with all the soft interface information
2903 * @dst_orig_node: the destination of the message
2904 * @ttvn: the version number that the source of the message is looking for
2905 * @tt_vlan: pointer to the first tvlv VLAN object to request
2906 * @num_vlan: number of tvlv VLAN entries
2907 * @full_table: ask for the entire translation table if true, while only for the
2908 * last TT diff otherwise
2910 * Return: true if the TT Request was sent, false otherwise
2912 static bool batadv_send_tt_request(struct batadv_priv
*bat_priv
,
2913 struct batadv_orig_node
*dst_orig_node
,
2915 struct batadv_tvlv_tt_vlan_data
*tt_vlan
,
2916 u16 num_vlan
, bool full_table
)
2918 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
2919 struct batadv_tt_req_node
*tt_req_node
= NULL
;
2920 struct batadv_tvlv_tt_vlan_data
*tt_vlan_req
;
2921 struct batadv_hard_iface
*primary_if
;
2925 primary_if
= batadv_primary_if_get_selected(bat_priv
);
2929 /* The new tt_req will be issued only if I'm not waiting for a
2930 * reply from the same orig_node yet
2932 tt_req_node
= batadv_tt_req_node_new(bat_priv
, dst_orig_node
);
2936 size
= sizeof(*tvlv_tt_data
) + sizeof(*tt_vlan_req
) * num_vlan
;
2937 tvlv_tt_data
= kzalloc(size
, GFP_ATOMIC
);
2941 tvlv_tt_data
->flags
= BATADV_TT_REQUEST
;
2942 tvlv_tt_data
->ttvn
= ttvn
;
2943 tvlv_tt_data
->num_vlan
= htons(num_vlan
);
2945 /* send all the CRCs within the request. This is needed by intermediate
2946 * nodes to ensure they have the correct table before replying
2948 tt_vlan_req
= (struct batadv_tvlv_tt_vlan_data
*)(tvlv_tt_data
+ 1);
2949 for (i
= 0; i
< num_vlan
; i
++) {
2950 tt_vlan_req
->vid
= tt_vlan
->vid
;
2951 tt_vlan_req
->crc
= tt_vlan
->crc
;
2958 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
2960 batadv_dbg(BATADV_DBG_TT
, bat_priv
, "Sending TT_REQUEST to %pM [%c]\n",
2961 dst_orig_node
->orig
, full_table
? 'F' : '.');
2963 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_REQUEST_TX
);
2964 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
2965 dst_orig_node
->orig
, BATADV_TVLV_TT
, 1,
2966 tvlv_tt_data
, size
);
2970 batadv_hardif_put(primary_if
);
2972 if (ret
&& tt_req_node
) {
2973 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
2974 if (!hlist_unhashed(&tt_req_node
->list
)) {
2975 hlist_del_init(&tt_req_node
->list
);
2976 batadv_tt_req_node_put(tt_req_node
);
2978 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
2981 batadv_tt_req_node_put(tt_req_node
);
2983 kfree(tvlv_tt_data
);
2988 * batadv_send_other_tt_response() - send reply to tt request concerning another
2989 * node's translation table
2990 * @bat_priv: the bat priv with all the soft interface information
2991 * @tt_data: tt data containing the tt request information
2992 * @req_src: mac address of tt request sender
2993 * @req_dst: mac address of tt request recipient
2995 * Return: true if tt request reply was sent, false otherwise.
2997 static bool batadv_send_other_tt_response(struct batadv_priv
*bat_priv
,
2998 struct batadv_tvlv_tt_data
*tt_data
,
2999 u8
*req_src
, u8
*req_dst
)
3001 struct batadv_orig_node
*req_dst_orig_node
;
3002 struct batadv_orig_node
*res_dst_orig_node
= NULL
;
3003 struct batadv_tvlv_tt_change
*tt_change
;
3004 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
3005 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
3006 bool ret
= false, full_table
;
3007 u8 orig_ttvn
, req_ttvn
;
3011 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3012 "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n",
3013 req_src
, tt_data
->ttvn
, req_dst
,
3014 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
3016 /* Let's get the orig node of the REAL destination */
3017 req_dst_orig_node
= batadv_orig_hash_find(bat_priv
, req_dst
);
3018 if (!req_dst_orig_node
)
3021 res_dst_orig_node
= batadv_orig_hash_find(bat_priv
, req_src
);
3022 if (!res_dst_orig_node
)
3025 orig_ttvn
= (u8
)atomic_read(&req_dst_orig_node
->last_ttvn
);
3026 req_ttvn
= tt_data
->ttvn
;
3028 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(tt_data
+ 1);
3029 /* this node doesn't have the requested data */
3030 if (orig_ttvn
!= req_ttvn
||
3031 !batadv_tt_global_check_crc(req_dst_orig_node
, tt_vlan
,
3032 ntohs(tt_data
->num_vlan
)))
3035 /* If the full table has been explicitly requested */
3036 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
||
3037 !req_dst_orig_node
->tt_buff
)
3042 /* TT fragmentation hasn't been implemented yet, so send as many
3043 * TT entries fit a single packet as possible only
3046 spin_lock_bh(&req_dst_orig_node
->tt_buff_lock
);
3047 tt_len
= req_dst_orig_node
->tt_buff_len
;
3049 tvlv_len
= batadv_tt_prepare_tvlv_global_data(req_dst_orig_node
,
3056 /* Copy the last orig_node's OGM buffer */
3057 memcpy(tt_change
, req_dst_orig_node
->tt_buff
,
3058 req_dst_orig_node
->tt_buff_len
);
3059 spin_unlock_bh(&req_dst_orig_node
->tt_buff_lock
);
3061 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3062 * in the initial part
3065 tvlv_len
= batadv_tt_prepare_tvlv_global_data(req_dst_orig_node
,
3072 /* fill the rest of the tvlv with the real TT entries */
3073 batadv_tt_tvlv_generate(bat_priv
, bat_priv
->tt
.global_hash
,
3075 batadv_tt_global_valid
,
3079 /* Don't send the response, if larger than fragmented packet. */
3080 tt_len
= sizeof(struct batadv_unicast_tvlv_packet
) + tvlv_len
;
3081 if (tt_len
> atomic_read(&bat_priv
->packet_size_max
)) {
3082 net_ratelimited_function(batadv_info
, bat_priv
->soft_iface
,
3083 "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n",
3084 res_dst_orig_node
->orig
);
3088 tvlv_tt_data
->flags
= BATADV_TT_RESPONSE
;
3089 tvlv_tt_data
->ttvn
= req_ttvn
;
3092 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
3094 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3095 "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n",
3096 res_dst_orig_node
->orig
, req_dst_orig_node
->orig
,
3097 full_table
? 'F' : '.', req_ttvn
);
3099 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_TX
);
3101 batadv_tvlv_unicast_send(bat_priv
, req_dst_orig_node
->orig
,
3102 req_src
, BATADV_TVLV_TT
, 1, tvlv_tt_data
,
3109 spin_unlock_bh(&req_dst_orig_node
->tt_buff_lock
);
3112 batadv_orig_node_put(res_dst_orig_node
);
3113 batadv_orig_node_put(req_dst_orig_node
);
3114 kfree(tvlv_tt_data
);
3119 * batadv_send_my_tt_response() - send reply to tt request concerning this
3120 * node's translation table
3121 * @bat_priv: the bat priv with all the soft interface information
3122 * @tt_data: tt data containing the tt request information
3123 * @req_src: mac address of tt request sender
3125 * Return: true if tt request reply was sent, false otherwise.
3127 static bool batadv_send_my_tt_response(struct batadv_priv
*bat_priv
,
3128 struct batadv_tvlv_tt_data
*tt_data
,
3131 struct batadv_tvlv_tt_data
*tvlv_tt_data
= NULL
;
3132 struct batadv_hard_iface
*primary_if
= NULL
;
3133 struct batadv_tvlv_tt_change
*tt_change
;
3134 struct batadv_orig_node
*orig_node
;
3135 u8 my_ttvn
, req_ttvn
;
3140 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3141 "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
3142 req_src
, tt_data
->ttvn
,
3143 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
3145 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
3147 my_ttvn
= (u8
)atomic_read(&bat_priv
->tt
.vn
);
3148 req_ttvn
= tt_data
->ttvn
;
3150 orig_node
= batadv_orig_hash_find(bat_priv
, req_src
);
3154 primary_if
= batadv_primary_if_get_selected(bat_priv
);
3158 /* If the full table has been explicitly requested or the gap
3159 * is too big send the whole local translation table
3161 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
|| my_ttvn
!= req_ttvn
||
3162 !bat_priv
->tt
.last_changeset
)
3167 /* TT fragmentation hasn't been implemented yet, so send as many
3168 * TT entries fit a single packet as possible only
3171 spin_lock_bh(&bat_priv
->tt
.last_changeset_lock
);
3173 tt_len
= bat_priv
->tt
.last_changeset_len
;
3174 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
,
3178 if (!tt_len
|| !tvlv_len
)
3181 /* Copy the last orig_node's OGM buffer */
3182 memcpy(tt_change
, bat_priv
->tt
.last_changeset
,
3183 bat_priv
->tt
.last_changeset_len
);
3184 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
3186 req_ttvn
= (u8
)atomic_read(&bat_priv
->tt
.vn
);
3188 /* allocate the tvlv, put the tt_data and all the tt_vlan_data
3189 * in the initial part
3192 tvlv_len
= batadv_tt_prepare_tvlv_local_data(bat_priv
,
3196 if (!tt_len
|| !tvlv_len
)
3199 /* fill the rest of the tvlv with the real TT entries */
3200 batadv_tt_tvlv_generate(bat_priv
, bat_priv
->tt
.local_hash
,
3202 batadv_tt_local_valid
, NULL
);
3205 tvlv_tt_data
->flags
= BATADV_TT_RESPONSE
;
3206 tvlv_tt_data
->ttvn
= req_ttvn
;
3209 tvlv_tt_data
->flags
|= BATADV_TT_FULL_TABLE
;
3211 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3212 "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n",
3213 orig_node
->orig
, full_table
? 'F' : '.', req_ttvn
);
3215 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_TX
);
3217 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
3218 req_src
, BATADV_TVLV_TT
, 1, tvlv_tt_data
,
3224 spin_unlock_bh(&bat_priv
->tt
.last_changeset_lock
);
3226 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
3227 batadv_orig_node_put(orig_node
);
3228 batadv_hardif_put(primary_if
);
3229 kfree(tvlv_tt_data
);
3230 /* The packet was for this host, so it doesn't need to be re-routed */
3235 * batadv_send_tt_response() - send reply to tt request
3236 * @bat_priv: the bat priv with all the soft interface information
3237 * @tt_data: tt data containing the tt request information
3238 * @req_src: mac address of tt request sender
3239 * @req_dst: mac address of tt request recipient
3241 * Return: true if tt request reply was sent, false otherwise.
3243 static bool batadv_send_tt_response(struct batadv_priv
*bat_priv
,
3244 struct batadv_tvlv_tt_data
*tt_data
,
3245 u8
*req_src
, u8
*req_dst
)
3247 if (batadv_is_my_mac(bat_priv
, req_dst
))
3248 return batadv_send_my_tt_response(bat_priv
, tt_data
, req_src
);
3249 return batadv_send_other_tt_response(bat_priv
, tt_data
, req_src
,
3253 static void _batadv_tt_update_changes(struct batadv_priv
*bat_priv
,
3254 struct batadv_orig_node
*orig_node
,
3255 struct batadv_tvlv_tt_change
*tt_change
,
3256 u16 tt_num_changes
, u8 ttvn
)
3261 for (i
= 0; i
< tt_num_changes
; i
++) {
3262 if ((tt_change
+ i
)->flags
& BATADV_TT_CLIENT_DEL
) {
3263 roams
= (tt_change
+ i
)->flags
& BATADV_TT_CLIENT_ROAM
;
3264 batadv_tt_global_del(bat_priv
, orig_node
,
3265 (tt_change
+ i
)->addr
,
3266 ntohs((tt_change
+ i
)->vid
),
3267 "tt removed by changes",
3270 if (!batadv_tt_global_add(bat_priv
, orig_node
,
3271 (tt_change
+ i
)->addr
,
3272 ntohs((tt_change
+ i
)->vid
),
3273 (tt_change
+ i
)->flags
, ttvn
))
3274 /* In case of problem while storing a
3275 * global_entry, we stop the updating
3276 * procedure without committing the
3277 * ttvn change. This will avoid to send
3278 * corrupted data on tt_request
3283 set_bit(BATADV_ORIG_CAPA_HAS_TT
, &orig_node
->capa_initialized
);
3286 static void batadv_tt_fill_gtable(struct batadv_priv
*bat_priv
,
3287 struct batadv_tvlv_tt_change
*tt_change
,
3288 u8 ttvn
, u8
*resp_src
,
3291 struct batadv_orig_node
*orig_node
;
3293 orig_node
= batadv_orig_hash_find(bat_priv
, resp_src
);
3297 /* Purge the old table first.. */
3298 batadv_tt_global_del_orig(bat_priv
, orig_node
, -1,
3299 "Received full table");
3301 _batadv_tt_update_changes(bat_priv
, orig_node
, tt_change
, num_entries
,
3304 spin_lock_bh(&orig_node
->tt_buff_lock
);
3305 kfree(orig_node
->tt_buff
);
3306 orig_node
->tt_buff_len
= 0;
3307 orig_node
->tt_buff
= NULL
;
3308 spin_unlock_bh(&orig_node
->tt_buff_lock
);
3310 atomic_set(&orig_node
->last_ttvn
, ttvn
);
3313 batadv_orig_node_put(orig_node
);
3316 static void batadv_tt_update_changes(struct batadv_priv
*bat_priv
,
3317 struct batadv_orig_node
*orig_node
,
3318 u16 tt_num_changes
, u8 ttvn
,
3319 struct batadv_tvlv_tt_change
*tt_change
)
3321 _batadv_tt_update_changes(bat_priv
, orig_node
, tt_change
,
3322 tt_num_changes
, ttvn
);
3324 batadv_tt_save_orig_buffer(bat_priv
, orig_node
, tt_change
,
3325 batadv_tt_len(tt_num_changes
));
3326 atomic_set(&orig_node
->last_ttvn
, ttvn
);
3330 * batadv_is_my_client() - check if a client is served by the local node
3331 * @bat_priv: the bat priv with all the soft interface information
3332 * @addr: the mac address of the client to check
3333 * @vid: VLAN identifier
3335 * Return: true if the client is served by this node, false otherwise.
3337 bool batadv_is_my_client(struct batadv_priv
*bat_priv
, const u8
*addr
,
3340 struct batadv_tt_local_entry
*tt_local_entry
;
3343 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
3344 if (!tt_local_entry
)
3346 /* Check if the client has been logically deleted (but is kept for
3347 * consistency purpose)
3349 if ((tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_PENDING
) ||
3350 (tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
))
3354 batadv_tt_local_entry_put(tt_local_entry
);
3359 * batadv_handle_tt_response() - process incoming tt reply
3360 * @bat_priv: the bat priv with all the soft interface information
3361 * @tt_data: tt data containing the tt request information
3362 * @resp_src: mac address of tt reply sender
3363 * @num_entries: number of tt change entries appended to the tt data
3365 static void batadv_handle_tt_response(struct batadv_priv
*bat_priv
,
3366 struct batadv_tvlv_tt_data
*tt_data
,
3367 u8
*resp_src
, u16 num_entries
)
3369 struct batadv_tt_req_node
*node
;
3370 struct hlist_node
*safe
;
3371 struct batadv_orig_node
*orig_node
= NULL
;
3372 struct batadv_tvlv_tt_change
*tt_change
;
3373 u8
*tvlv_ptr
= (u8
*)tt_data
;
3376 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3377 "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
3378 resp_src
, tt_data
->ttvn
, num_entries
,
3379 ((tt_data
->flags
& BATADV_TT_FULL_TABLE
) ? 'F' : '.'));
3381 orig_node
= batadv_orig_hash_find(bat_priv
, resp_src
);
3385 spin_lock_bh(&orig_node
->tt_lock
);
3387 change_offset
= sizeof(struct batadv_tvlv_tt_vlan_data
);
3388 change_offset
*= ntohs(tt_data
->num_vlan
);
3389 change_offset
+= sizeof(*tt_data
);
3390 tvlv_ptr
+= change_offset
;
3392 tt_change
= (struct batadv_tvlv_tt_change
*)tvlv_ptr
;
3393 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
) {
3394 batadv_tt_fill_gtable(bat_priv
, tt_change
, tt_data
->ttvn
,
3395 resp_src
, num_entries
);
3397 batadv_tt_update_changes(bat_priv
, orig_node
, num_entries
,
3398 tt_data
->ttvn
, tt_change
);
3401 /* Recalculate the CRC for this orig_node and store it */
3402 batadv_tt_global_update_crc(bat_priv
, orig_node
);
3404 spin_unlock_bh(&orig_node
->tt_lock
);
3406 /* Delete the tt_req_node from pending tt_requests list */
3407 spin_lock_bh(&bat_priv
->tt
.req_list_lock
);
3408 hlist_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.req_list
, list
) {
3409 if (!batadv_compare_eth(node
->addr
, resp_src
))
3411 hlist_del_init(&node
->list
);
3412 batadv_tt_req_node_put(node
);
3415 spin_unlock_bh(&bat_priv
->tt
.req_list_lock
);
3417 batadv_orig_node_put(orig_node
);
3420 static void batadv_tt_roam_list_free(struct batadv_priv
*bat_priv
)
3422 struct batadv_tt_roam_node
*node
, *safe
;
3424 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3426 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.roam_list
, list
) {
3427 list_del(&node
->list
);
3428 kmem_cache_free(batadv_tt_roam_cache
, node
);
3431 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3434 static void batadv_tt_roam_purge(struct batadv_priv
*bat_priv
)
3436 struct batadv_tt_roam_node
*node
, *safe
;
3438 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3439 list_for_each_entry_safe(node
, safe
, &bat_priv
->tt
.roam_list
, list
) {
3440 if (!batadv_has_timed_out(node
->first_time
,
3441 BATADV_ROAMING_MAX_TIME
))
3444 list_del(&node
->list
);
3445 kmem_cache_free(batadv_tt_roam_cache
, node
);
3447 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3451 * batadv_tt_check_roam_count() - check if a client has roamed too frequently
3452 * @bat_priv: the bat priv with all the soft interface information
3453 * @client: mac address of the roaming client
3455 * This function checks whether the client already reached the
3456 * maximum number of possible roaming phases. In this case the ROAMING_ADV
3459 * Return: true if the ROAMING_ADV can be sent, false otherwise
3461 static bool batadv_tt_check_roam_count(struct batadv_priv
*bat_priv
, u8
*client
)
3463 struct batadv_tt_roam_node
*tt_roam_node
;
3466 spin_lock_bh(&bat_priv
->tt
.roam_list_lock
);
3467 /* The new tt_req will be issued only if I'm not waiting for a
3468 * reply from the same orig_node yet
3470 list_for_each_entry(tt_roam_node
, &bat_priv
->tt
.roam_list
, list
) {
3471 if (!batadv_compare_eth(tt_roam_node
->addr
, client
))
3474 if (batadv_has_timed_out(tt_roam_node
->first_time
,
3475 BATADV_ROAMING_MAX_TIME
))
3478 if (!batadv_atomic_dec_not_zero(&tt_roam_node
->counter
))
3479 /* Sorry, you roamed too many times! */
3486 tt_roam_node
= kmem_cache_alloc(batadv_tt_roam_cache
,
3491 tt_roam_node
->first_time
= jiffies
;
3492 atomic_set(&tt_roam_node
->counter
,
3493 BATADV_ROAMING_MAX_COUNT
- 1);
3494 ether_addr_copy(tt_roam_node
->addr
, client
);
3496 list_add(&tt_roam_node
->list
, &bat_priv
->tt
.roam_list
);
3501 spin_unlock_bh(&bat_priv
->tt
.roam_list_lock
);
3506 * batadv_send_roam_adv() - send a roaming advertisement message
3507 * @bat_priv: the bat priv with all the soft interface information
3508 * @client: mac address of the roaming client
3509 * @vid: VLAN identifier
3510 * @orig_node: message destination
3512 * Send a ROAMING_ADV message to the node which was previously serving this
3513 * client. This is done to inform the node that from now on all traffic destined
3514 * for this particular roamed client has to be forwarded to the sender of the
3517 static void batadv_send_roam_adv(struct batadv_priv
*bat_priv
, u8
*client
,
3519 struct batadv_orig_node
*orig_node
)
3521 struct batadv_hard_iface
*primary_if
;
3522 struct batadv_tvlv_roam_adv tvlv_roam
;
3524 primary_if
= batadv_primary_if_get_selected(bat_priv
);
3528 /* before going on we have to check whether the client has
3529 * already roamed to us too many times
3531 if (!batadv_tt_check_roam_count(bat_priv
, client
))
3534 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3535 "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n",
3536 orig_node
->orig
, client
, batadv_print_vid(vid
));
3538 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_ROAM_ADV_TX
);
3540 memcpy(tvlv_roam
.client
, client
, sizeof(tvlv_roam
.client
));
3541 tvlv_roam
.vid
= htons(vid
);
3543 batadv_tvlv_unicast_send(bat_priv
, primary_if
->net_dev
->dev_addr
,
3544 orig_node
->orig
, BATADV_TVLV_ROAM
, 1,
3545 &tvlv_roam
, sizeof(tvlv_roam
));
3548 batadv_hardif_put(primary_if
);
3551 static void batadv_tt_purge(struct work_struct
*work
)
3553 struct delayed_work
*delayed_work
;
3554 struct batadv_priv_tt
*priv_tt
;
3555 struct batadv_priv
*bat_priv
;
3557 delayed_work
= to_delayed_work(work
);
3558 priv_tt
= container_of(delayed_work
, struct batadv_priv_tt
, work
);
3559 bat_priv
= container_of(priv_tt
, struct batadv_priv
, tt
);
3561 batadv_tt_local_purge(bat_priv
, BATADV_TT_LOCAL_TIMEOUT
);
3562 batadv_tt_global_purge(bat_priv
);
3563 batadv_tt_req_purge(bat_priv
);
3564 batadv_tt_roam_purge(bat_priv
);
3566 queue_delayed_work(batadv_event_workqueue
, &bat_priv
->tt
.work
,
3567 msecs_to_jiffies(BATADV_TT_WORK_PERIOD
));
3571 * batadv_tt_free() - Free translation table of soft interface
3572 * @bat_priv: the bat priv with all the soft interface information
3574 void batadv_tt_free(struct batadv_priv
*bat_priv
)
3576 batadv_tvlv_handler_unregister(bat_priv
, BATADV_TVLV_ROAM
, 1);
3578 batadv_tvlv_container_unregister(bat_priv
, BATADV_TVLV_TT
, 1);
3579 batadv_tvlv_handler_unregister(bat_priv
, BATADV_TVLV_TT
, 1);
3581 cancel_delayed_work_sync(&bat_priv
->tt
.work
);
3583 batadv_tt_local_table_free(bat_priv
);
3584 batadv_tt_global_table_free(bat_priv
);
3585 batadv_tt_req_list_free(bat_priv
);
3586 batadv_tt_changes_list_free(bat_priv
);
3587 batadv_tt_roam_list_free(bat_priv
);
3589 kfree(bat_priv
->tt
.last_changeset
);
3593 * batadv_tt_local_set_flags() - set or unset the specified flags on the local
3594 * table and possibly count them in the TT size
3595 * @bat_priv: the bat priv with all the soft interface information
3596 * @flags: the flag to switch
3597 * @enable: whether to set or unset the flag
3598 * @count: whether to increase the TT size by the number of changed entries
3600 static void batadv_tt_local_set_flags(struct batadv_priv
*bat_priv
, u16 flags
,
3601 bool enable
, bool count
)
3603 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
3604 struct batadv_tt_common_entry
*tt_common_entry
;
3605 struct hlist_head
*head
;
3611 for (i
= 0; i
< hash
->size
; i
++) {
3612 head
= &hash
->table
[i
];
3615 hlist_for_each_entry_rcu(tt_common_entry
,
3618 if ((tt_common_entry
->flags
& flags
) == flags
)
3620 tt_common_entry
->flags
|= flags
;
3622 if (!(tt_common_entry
->flags
& flags
))
3624 tt_common_entry
->flags
&= ~flags
;
3630 batadv_tt_local_size_inc(bat_priv
,
3631 tt_common_entry
->vid
);
3637 /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */
3638 static void batadv_tt_local_purge_pending_clients(struct batadv_priv
*bat_priv
)
3640 struct batadv_hashtable
*hash
= bat_priv
->tt
.local_hash
;
3641 struct batadv_tt_common_entry
*tt_common
;
3642 struct batadv_tt_local_entry
*tt_local
;
3643 struct hlist_node
*node_tmp
;
3644 struct hlist_head
*head
;
3645 spinlock_t
*list_lock
; /* protects write access to the hash lists */
3651 for (i
= 0; i
< hash
->size
; i
++) {
3652 head
= &hash
->table
[i
];
3653 list_lock
= &hash
->list_locks
[i
];
3655 spin_lock_bh(list_lock
);
3656 hlist_for_each_entry_safe(tt_common
, node_tmp
, head
,
3658 if (!(tt_common
->flags
& BATADV_TT_CLIENT_PENDING
))
3661 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3662 "Deleting local tt entry (%pM, vid: %d): pending\n",
3664 batadv_print_vid(tt_common
->vid
));
3666 batadv_tt_local_size_dec(bat_priv
, tt_common
->vid
);
3667 hlist_del_rcu(&tt_common
->hash_entry
);
3668 tt_local
= container_of(tt_common
,
3669 struct batadv_tt_local_entry
,
3672 batadv_tt_local_entry_put(tt_local
);
3674 spin_unlock_bh(list_lock
);
3679 * batadv_tt_local_commit_changes_nolock() - commit all pending local tt changes
3680 * which have been queued in the time since the last commit
3681 * @bat_priv: the bat priv with all the soft interface information
3683 * Caller must hold tt->commit_lock.
3685 static void batadv_tt_local_commit_changes_nolock(struct batadv_priv
*bat_priv
)
3687 lockdep_assert_held(&bat_priv
->tt
.commit_lock
);
3689 if (atomic_read(&bat_priv
->tt
.local_changes
) < 1) {
3690 if (!batadv_atomic_dec_not_zero(&bat_priv
->tt
.ogm_append_cnt
))
3691 batadv_tt_tvlv_container_update(bat_priv
);
3695 batadv_tt_local_set_flags(bat_priv
, BATADV_TT_CLIENT_NEW
, false, true);
3697 batadv_tt_local_purge_pending_clients(bat_priv
);
3698 batadv_tt_local_update_crc(bat_priv
);
3700 /* Increment the TTVN only once per OGM interval */
3701 atomic_inc(&bat_priv
->tt
.vn
);
3702 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3703 "Local changes committed, updating to ttvn %u\n",
3704 (u8
)atomic_read(&bat_priv
->tt
.vn
));
3706 /* reset the sending counter */
3707 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, BATADV_TT_OGM_APPEND_MAX
);
3708 batadv_tt_tvlv_container_update(bat_priv
);
3712 * batadv_tt_local_commit_changes() - commit all pending local tt changes which
3713 * have been queued in the time since the last commit
3714 * @bat_priv: the bat priv with all the soft interface information
3716 void batadv_tt_local_commit_changes(struct batadv_priv
*bat_priv
)
3718 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
3719 batadv_tt_local_commit_changes_nolock(bat_priv
);
3720 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
3724 * batadv_is_ap_isolated() - Check if packet from upper layer should be dropped
3725 * @bat_priv: the bat priv with all the soft interface information
3726 * @src: source mac address of packet
3727 * @dst: destination mac address of packet
3728 * @vid: vlan id of packet
3730 * Return: true when src+dst(+vid) pair should be isolated, false otherwise
3732 bool batadv_is_ap_isolated(struct batadv_priv
*bat_priv
, u8
*src
, u8
*dst
,
3735 struct batadv_tt_local_entry
*tt_local_entry
;
3736 struct batadv_tt_global_entry
*tt_global_entry
;
3737 struct batadv_softif_vlan
*vlan
;
3740 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
3744 if (!atomic_read(&vlan
->ap_isolation
))
3747 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, dst
, vid
);
3748 if (!tt_local_entry
)
3751 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, src
, vid
);
3752 if (!tt_global_entry
)
3753 goto local_entry_put
;
3755 if (_batadv_is_ap_isolated(tt_local_entry
, tt_global_entry
))
3758 batadv_tt_global_entry_put(tt_global_entry
);
3760 batadv_tt_local_entry_put(tt_local_entry
);
3762 batadv_softif_vlan_put(vlan
);
3767 * batadv_tt_update_orig() - update global translation table with new tt
3768 * information received via ogms
3769 * @bat_priv: the bat priv with all the soft interface information
3770 * @orig_node: the orig_node of the ogm
3771 * @tt_buff: pointer to the first tvlv VLAN entry
3772 * @tt_num_vlan: number of tvlv VLAN entries
3773 * @tt_change: pointer to the first entry in the TT buffer
3774 * @tt_num_changes: number of tt changes inside the tt buffer
3775 * @ttvn: translation table version number of this changeset
3777 static void batadv_tt_update_orig(struct batadv_priv
*bat_priv
,
3778 struct batadv_orig_node
*orig_node
,
3779 const void *tt_buff
, u16 tt_num_vlan
,
3780 struct batadv_tvlv_tt_change
*tt_change
,
3781 u16 tt_num_changes
, u8 ttvn
)
3783 u8 orig_ttvn
= (u8
)atomic_read(&orig_node
->last_ttvn
);
3784 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
3785 bool full_table
= true;
3788 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)tt_buff
;
3789 has_tt_init
= test_bit(BATADV_ORIG_CAPA_HAS_TT
,
3790 &orig_node
->capa_initialized
);
3792 /* orig table not initialised AND first diff is in the OGM OR the ttvn
3793 * increased by one -> we can apply the attached changes
3795 if ((!has_tt_init
&& ttvn
== 1) || ttvn
- orig_ttvn
== 1) {
3796 /* the OGM could not contain the changes due to their size or
3797 * because they have already been sent BATADV_TT_OGM_APPEND_MAX
3799 * In this case send a tt request
3801 if (!tt_num_changes
) {
3806 spin_lock_bh(&orig_node
->tt_lock
);
3808 batadv_tt_update_changes(bat_priv
, orig_node
, tt_num_changes
,
3811 /* Even if we received the precomputed crc with the OGM, we
3812 * prefer to recompute it to spot any possible inconsistency
3813 * in the global table
3815 batadv_tt_global_update_crc(bat_priv
, orig_node
);
3817 spin_unlock_bh(&orig_node
->tt_lock
);
3819 /* The ttvn alone is not enough to guarantee consistency
3820 * because a single value could represent different states
3821 * (due to the wrap around). Thus a node has to check whether
3822 * the resulting table (after applying the changes) is still
3823 * consistent or not. E.g. a node could disconnect while its
3824 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
3825 * checking the CRC value is mandatory to detect the
3828 if (!batadv_tt_global_check_crc(orig_node
, tt_vlan
,
3832 /* if we missed more than one change or our tables are not
3833 * in sync anymore -> request fresh tt data
3835 if (!has_tt_init
|| ttvn
!= orig_ttvn
||
3836 !batadv_tt_global_check_crc(orig_node
, tt_vlan
,
3839 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3840 "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n",
3841 orig_node
->orig
, ttvn
, orig_ttvn
,
3843 batadv_send_tt_request(bat_priv
, orig_node
, ttvn
,
3844 tt_vlan
, tt_num_vlan
,
3852 * batadv_tt_global_client_is_roaming() - check if a client is marked as roaming
3853 * @bat_priv: the bat priv with all the soft interface information
3854 * @addr: the mac address of the client to check
3855 * @vid: VLAN identifier
3857 * Return: true if we know that the client has moved from its old originator
3858 * to another one. This entry is still kept for consistency purposes and will be
3859 * deleted later by a DEL or because of timeout
3861 bool batadv_tt_global_client_is_roaming(struct batadv_priv
*bat_priv
,
3862 u8
*addr
, unsigned short vid
)
3864 struct batadv_tt_global_entry
*tt_global_entry
;
3867 tt_global_entry
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
3868 if (!tt_global_entry
)
3871 ret
= tt_global_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
;
3872 batadv_tt_global_entry_put(tt_global_entry
);
3878 * batadv_tt_local_client_is_roaming() - tells whether the client is roaming
3879 * @bat_priv: the bat priv with all the soft interface information
3880 * @addr: the mac address of the local client to query
3881 * @vid: VLAN identifier
3883 * Return: true if the local client is known to be roaming (it is not served by
3884 * this node anymore) or not. If yes, the client is still present in the table
3885 * to keep the latter consistent with the node TTVN
3887 bool batadv_tt_local_client_is_roaming(struct batadv_priv
*bat_priv
,
3888 u8
*addr
, unsigned short vid
)
3890 struct batadv_tt_local_entry
*tt_local_entry
;
3893 tt_local_entry
= batadv_tt_local_hash_find(bat_priv
, addr
, vid
);
3894 if (!tt_local_entry
)
3897 ret
= tt_local_entry
->common
.flags
& BATADV_TT_CLIENT_ROAM
;
3898 batadv_tt_local_entry_put(tt_local_entry
);
3904 * batadv_tt_add_temporary_global_entry() - Add temporary entry to global TT
3905 * @bat_priv: the bat priv with all the soft interface information
3906 * @orig_node: orig node which the temporary entry should be associated with
3907 * @addr: mac address of the client
3908 * @vid: VLAN id of the new temporary global translation table
3910 * Return: true when temporary tt entry could be added, false otherwise
3912 bool batadv_tt_add_temporary_global_entry(struct batadv_priv
*bat_priv
,
3913 struct batadv_orig_node
*orig_node
,
3914 const unsigned char *addr
,
3917 /* ignore loop detect macs, they are not supposed to be in the tt local
3920 if (batadv_bla_is_loopdetect_mac(addr
))
3923 if (!batadv_tt_global_add(bat_priv
, orig_node
, addr
, vid
,
3924 BATADV_TT_CLIENT_TEMP
,
3925 atomic_read(&orig_node
->last_ttvn
)))
3928 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
3929 "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n",
3930 addr
, batadv_print_vid(vid
), orig_node
->orig
);
3936 * batadv_tt_local_resize_to_mtu() - resize the local translation table fit the
3937 * maximum packet size that can be transported through the mesh
3938 * @soft_iface: netdev struct of the mesh interface
3940 * Remove entries older than 'timeout' and half timeout if more entries need
3943 void batadv_tt_local_resize_to_mtu(struct net_device
*soft_iface
)
3945 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
3946 int packet_size_max
= atomic_read(&bat_priv
->packet_size_max
);
3947 int table_size
, timeout
= BATADV_TT_LOCAL_TIMEOUT
/ 2;
3948 bool reduced
= false;
3950 spin_lock_bh(&bat_priv
->tt
.commit_lock
);
3953 table_size
= batadv_tt_local_table_transmit_size(bat_priv
);
3954 if (packet_size_max
>= table_size
)
3957 batadv_tt_local_purge(bat_priv
, timeout
);
3958 batadv_tt_local_purge_pending_clients(bat_priv
);
3962 net_ratelimited_function(batadv_info
, soft_iface
,
3963 "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n",
3967 /* commit these changes immediately, to avoid synchronization problem
3971 batadv_tt_local_commit_changes_nolock(bat_priv
);
3973 spin_unlock_bh(&bat_priv
->tt
.commit_lock
);
3977 * batadv_tt_tvlv_ogm_handler_v1() - process incoming tt tvlv container
3978 * @bat_priv: the bat priv with all the soft interface information
3979 * @orig: the orig_node of the ogm
3980 * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
3981 * @tvlv_value: tvlv buffer containing the gateway data
3982 * @tvlv_value_len: tvlv buffer length
3984 static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv
*bat_priv
,
3985 struct batadv_orig_node
*orig
,
3986 u8 flags
, void *tvlv_value
,
3989 struct batadv_tvlv_tt_vlan_data
*tt_vlan
;
3990 struct batadv_tvlv_tt_change
*tt_change
;
3991 struct batadv_tvlv_tt_data
*tt_data
;
3992 u16 num_entries
, num_vlan
;
3994 if (tvlv_value_len
< sizeof(*tt_data
))
3997 tt_data
= (struct batadv_tvlv_tt_data
*)tvlv_value
;
3998 tvlv_value_len
-= sizeof(*tt_data
);
4000 num_vlan
= ntohs(tt_data
->num_vlan
);
4002 if (tvlv_value_len
< sizeof(*tt_vlan
) * num_vlan
)
4005 tt_vlan
= (struct batadv_tvlv_tt_vlan_data
*)(tt_data
+ 1);
4006 tt_change
= (struct batadv_tvlv_tt_change
*)(tt_vlan
+ num_vlan
);
4007 tvlv_value_len
-= sizeof(*tt_vlan
) * num_vlan
;
4009 num_entries
= batadv_tt_entries(tvlv_value_len
);
4011 batadv_tt_update_orig(bat_priv
, orig
, tt_vlan
, num_vlan
, tt_change
,
4012 num_entries
, tt_data
->ttvn
);
4016 * batadv_tt_tvlv_unicast_handler_v1() - process incoming (unicast) tt tvlv
4018 * @bat_priv: the bat priv with all the soft interface information
4019 * @src: mac address of tt tvlv sender
4020 * @dst: mac address of tt tvlv recipient
4021 * @tvlv_value: tvlv buffer containing the tt data
4022 * @tvlv_value_len: tvlv buffer length
4024 * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS
4027 static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv
*bat_priv
,
4032 struct batadv_tvlv_tt_data
*tt_data
;
4033 u16 tt_vlan_len
, tt_num_entries
;
4037 if (tvlv_value_len
< sizeof(*tt_data
))
4038 return NET_RX_SUCCESS
;
4040 tt_data
= (struct batadv_tvlv_tt_data
*)tvlv_value
;
4041 tvlv_value_len
-= sizeof(*tt_data
);
4043 tt_vlan_len
= sizeof(struct batadv_tvlv_tt_vlan_data
);
4044 tt_vlan_len
*= ntohs(tt_data
->num_vlan
);
4046 if (tvlv_value_len
< tt_vlan_len
)
4047 return NET_RX_SUCCESS
;
4049 tvlv_value_len
-= tt_vlan_len
;
4050 tt_num_entries
= batadv_tt_entries(tvlv_value_len
);
4052 switch (tt_data
->flags
& BATADV_TT_DATA_TYPE_MASK
) {
4053 case BATADV_TT_REQUEST
:
4054 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_REQUEST_RX
);
4056 /* If this node cannot provide a TT response the tt_request is
4059 ret
= batadv_send_tt_response(bat_priv
, tt_data
, src
, dst
);
4061 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
)
4066 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
4067 "Routing TT_REQUEST to %pM [%c]\n",
4069 /* tvlv API will re-route the packet */
4073 case BATADV_TT_RESPONSE
:
4074 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_RESPONSE_RX
);
4076 if (batadv_is_my_mac(bat_priv
, dst
)) {
4077 batadv_handle_tt_response(bat_priv
, tt_data
,
4078 src
, tt_num_entries
);
4079 return NET_RX_SUCCESS
;
4082 if (tt_data
->flags
& BATADV_TT_FULL_TABLE
)
4087 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
4088 "Routing TT_RESPONSE to %pM [%c]\n", dst
, tt_flag
);
4090 /* tvlv API will re-route the packet */
4094 return NET_RX_SUCCESS
;
4098 * batadv_roam_tvlv_unicast_handler_v1() - process incoming tt roam tvlv
4100 * @bat_priv: the bat priv with all the soft interface information
4101 * @src: mac address of tt tvlv sender
4102 * @dst: mac address of tt tvlv recipient
4103 * @tvlv_value: tvlv buffer containing the tt data
4104 * @tvlv_value_len: tvlv buffer length
4106 * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS
4109 static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv
*bat_priv
,
4114 struct batadv_tvlv_roam_adv
*roaming_adv
;
4115 struct batadv_orig_node
*orig_node
= NULL
;
4117 /* If this node is not the intended recipient of the
4118 * roaming advertisement the packet is forwarded
4119 * (the tvlv API will re-route the packet).
4121 if (!batadv_is_my_mac(bat_priv
, dst
))
4124 if (tvlv_value_len
< sizeof(*roaming_adv
))
4127 orig_node
= batadv_orig_hash_find(bat_priv
, src
);
4131 batadv_inc_counter(bat_priv
, BATADV_CNT_TT_ROAM_ADV_RX
);
4132 roaming_adv
= (struct batadv_tvlv_roam_adv
*)tvlv_value
;
4134 batadv_dbg(BATADV_DBG_TT
, bat_priv
,
4135 "Received ROAMING_ADV from %pM (client %pM)\n",
4136 src
, roaming_adv
->client
);
4138 batadv_tt_global_add(bat_priv
, orig_node
, roaming_adv
->client
,
4139 ntohs(roaming_adv
->vid
), BATADV_TT_CLIENT_ROAM
,
4140 atomic_read(&orig_node
->last_ttvn
) + 1);
4143 batadv_orig_node_put(orig_node
);
4144 return NET_RX_SUCCESS
;
4148 * batadv_tt_init() - initialise the translation table internals
4149 * @bat_priv: the bat priv with all the soft interface information
4151 * Return: 0 on success or negative error number in case of failure.
4153 int batadv_tt_init(struct batadv_priv
*bat_priv
)
4157 /* synchronized flags must be remote */
4158 BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK
& BATADV_TT_REMOTE_MASK
));
4160 ret
= batadv_tt_local_init(bat_priv
);
4164 ret
= batadv_tt_global_init(bat_priv
);
4166 batadv_tt_local_table_free(bat_priv
);
4170 batadv_tvlv_handler_register(bat_priv
, batadv_tt_tvlv_ogm_handler_v1
,
4171 batadv_tt_tvlv_unicast_handler_v1
,
4172 BATADV_TVLV_TT
, 1, BATADV_NO_FLAGS
);
4174 batadv_tvlv_handler_register(bat_priv
, NULL
,
4175 batadv_roam_tvlv_unicast_handler_v1
,
4176 BATADV_TVLV_ROAM
, 1, BATADV_NO_FLAGS
);
4178 INIT_DELAYED_WORK(&bat_priv
->tt
.work
, batadv_tt_purge
);
4179 queue_delayed_work(batadv_event_workqueue
, &bat_priv
->tt
.work
,
4180 msecs_to_jiffies(BATADV_TT_WORK_PERIOD
));
4186 * batadv_tt_global_is_isolated() - check if a client is marked as isolated
4187 * @bat_priv: the bat priv with all the soft interface information
4188 * @addr: the mac address of the client
4189 * @vid: the identifier of the VLAN where this client is connected
4191 * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false
4194 bool batadv_tt_global_is_isolated(struct batadv_priv
*bat_priv
,
4195 const u8
*addr
, unsigned short vid
)
4197 struct batadv_tt_global_entry
*tt
;
4200 tt
= batadv_tt_global_hash_find(bat_priv
, addr
, vid
);
4204 ret
= tt
->common
.flags
& BATADV_TT_CLIENT_ISOLA
;
4206 batadv_tt_global_entry_put(tt
);
4212 * batadv_tt_cache_init() - Initialize tt memory object cache
4214 * Return: 0 on success or negative error number in case of failure.
4216 int __init
batadv_tt_cache_init(void)
4218 size_t tl_size
= sizeof(struct batadv_tt_local_entry
);
4219 size_t tg_size
= sizeof(struct batadv_tt_global_entry
);
4220 size_t tt_orig_size
= sizeof(struct batadv_tt_orig_list_entry
);
4221 size_t tt_change_size
= sizeof(struct batadv_tt_change_node
);
4222 size_t tt_req_size
= sizeof(struct batadv_tt_req_node
);
4223 size_t tt_roam_size
= sizeof(struct batadv_tt_roam_node
);
4225 batadv_tl_cache
= kmem_cache_create("batadv_tl_cache", tl_size
, 0,
4226 SLAB_HWCACHE_ALIGN
, NULL
);
4227 if (!batadv_tl_cache
)
4230 batadv_tg_cache
= kmem_cache_create("batadv_tg_cache", tg_size
, 0,
4231 SLAB_HWCACHE_ALIGN
, NULL
);
4232 if (!batadv_tg_cache
)
4233 goto err_tt_tl_destroy
;
4235 batadv_tt_orig_cache
= kmem_cache_create("batadv_tt_orig_cache",
4237 SLAB_HWCACHE_ALIGN
, NULL
);
4238 if (!batadv_tt_orig_cache
)
4239 goto err_tt_tg_destroy
;
4241 batadv_tt_change_cache
= kmem_cache_create("batadv_tt_change_cache",
4243 SLAB_HWCACHE_ALIGN
, NULL
);
4244 if (!batadv_tt_change_cache
)
4245 goto err_tt_orig_destroy
;
4247 batadv_tt_req_cache
= kmem_cache_create("batadv_tt_req_cache",
4249 SLAB_HWCACHE_ALIGN
, NULL
);
4250 if (!batadv_tt_req_cache
)
4251 goto err_tt_change_destroy
;
4253 batadv_tt_roam_cache
= kmem_cache_create("batadv_tt_roam_cache",
4255 SLAB_HWCACHE_ALIGN
, NULL
);
4256 if (!batadv_tt_roam_cache
)
4257 goto err_tt_req_destroy
;
4262 kmem_cache_destroy(batadv_tt_req_cache
);
4263 batadv_tt_req_cache
= NULL
;
4264 err_tt_change_destroy
:
4265 kmem_cache_destroy(batadv_tt_change_cache
);
4266 batadv_tt_change_cache
= NULL
;
4267 err_tt_orig_destroy
:
4268 kmem_cache_destroy(batadv_tt_orig_cache
);
4269 batadv_tt_orig_cache
= NULL
;
4271 kmem_cache_destroy(batadv_tg_cache
);
4272 batadv_tg_cache
= NULL
;
4274 kmem_cache_destroy(batadv_tl_cache
);
4275 batadv_tl_cache
= NULL
;
4281 * batadv_tt_cache_destroy() - Destroy tt memory object cache
4283 void batadv_tt_cache_destroy(void)
4285 kmem_cache_destroy(batadv_tl_cache
);
4286 kmem_cache_destroy(batadv_tg_cache
);
4287 kmem_cache_destroy(batadv_tt_orig_cache
);
4288 kmem_cache_destroy(batadv_tt_change_cache
);
4289 kmem_cache_destroy(batadv_tt_req_cache
);
4290 kmem_cache_destroy(batadv_tt_roam_cache
);