xref: /linux/net/batman-adv/types.h (revision 3a39d672e7f48b8d6b91a09afa4b55352773b4b5)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (C) B.A.T.M.A.N. contributors:
3  *
4  * Marek Lindner, Simon Wunderlich
5  */
6 
7 #ifndef _NET_BATMAN_ADV_TYPES_H_
8 #define _NET_BATMAN_ADV_TYPES_H_
9 
10 #ifndef _NET_BATMAN_ADV_MAIN_H_
11 #error only "main.h" can be included directly
12 #endif
13 
14 #include <linux/average.h>
15 #include <linux/bitops.h>
16 #include <linux/compiler.h>
17 #include <linux/if.h>
18 #include <linux/if_ether.h>
19 #include <linux/kref.h>
20 #include <linux/mutex.h>
21 #include <linux/netdevice.h>
22 #include <linux/netlink.h>
23 #include <linux/sched.h> /* for linux/wait.h */
24 #include <linux/skbuff.h>
25 #include <linux/spinlock.h>
26 #include <linux/timer.h>
27 #include <linux/types.h>
28 #include <linux/wait.h>
29 #include <linux/workqueue.h>
30 #include <uapi/linux/batadv_packet.h>
31 #include <uapi/linux/batman_adv.h>
32 
33 #ifdef CONFIG_BATMAN_ADV_DAT
34 
35 /**
36  * typedef batadv_dat_addr_t - type used for all DHT addresses
37  *
38  * If it is changed, BATADV_DAT_ADDR_MAX is changed as well.
39  *
40  * *Please be careful: batadv_dat_addr_t must be UNSIGNED*
41  */
42 typedef u16 batadv_dat_addr_t;
43 
44 #endif /* CONFIG_BATMAN_ADV_DAT */
45 
46 /**
47  * enum batadv_dhcp_recipient - dhcp destination
48  */
49 enum batadv_dhcp_recipient {
50 	/** @BATADV_DHCP_NO: packet is not a dhcp message */
51 	BATADV_DHCP_NO = 0,
52 
53 	/** @BATADV_DHCP_TO_SERVER: dhcp message is directed to a server */
54 	BATADV_DHCP_TO_SERVER,
55 
56 	/** @BATADV_DHCP_TO_CLIENT: dhcp message is directed to a client */
57 	BATADV_DHCP_TO_CLIENT,
58 };
59 
60 /**
61  * BATADV_TT_REMOTE_MASK - bitmask selecting the flags that are sent over the
62  *  wire only
63  */
64 #define BATADV_TT_REMOTE_MASK	0x00FF
65 
66 /**
67  * BATADV_TT_SYNC_MASK - bitmask of the flags that need to be kept in sync
68  *  among the nodes. These flags are used to compute the global/local CRC
69  */
70 #define BATADV_TT_SYNC_MASK	0x00F0
71 
72 /**
73  * struct batadv_hard_iface_bat_iv - per hard-interface B.A.T.M.A.N. IV data
74  */
75 struct batadv_hard_iface_bat_iv {
76 	/** @ogm_buff: buffer holding the OGM packet */
77 	unsigned char *ogm_buff;
78 
79 	/** @ogm_buff_len: length of the OGM packet buffer */
80 	int ogm_buff_len;
81 
82 	/** @ogm_seqno: OGM sequence number - used to identify each OGM */
83 	atomic_t ogm_seqno;
84 
85 	/** @ogm_buff_mutex: lock protecting ogm_buff and ogm_buff_len */
86 	struct mutex ogm_buff_mutex;
87 };
88 
89 /**
90  * enum batadv_v_hard_iface_flags - interface flags useful to B.A.T.M.A.N. V
91  */
92 enum batadv_v_hard_iface_flags {
93 	/**
94 	 * @BATADV_FULL_DUPLEX: tells if the connection over this link is
95 	 *  full-duplex
96 	 */
97 	BATADV_FULL_DUPLEX	= BIT(0),
98 
99 	/**
100 	 * @BATADV_WARNING_DEFAULT: tells whether we have warned the user that
101 	 *  no throughput data is available for this interface and that default
102 	 *  values are assumed.
103 	 */
104 	BATADV_WARNING_DEFAULT	= BIT(1),
105 };
106 
107 /**
108  * struct batadv_hard_iface_bat_v - per hard-interface B.A.T.M.A.N. V data
109  */
110 struct batadv_hard_iface_bat_v {
111 	/** @elp_interval: time interval between two ELP transmissions */
112 	atomic_t elp_interval;
113 
114 	/** @elp_seqno: current ELP sequence number */
115 	atomic_t elp_seqno;
116 
117 	/** @elp_skb: base skb containing the ELP message to send */
118 	struct sk_buff *elp_skb;
119 
120 	/** @elp_wq: workqueue used to schedule ELP transmissions */
121 	struct delayed_work elp_wq;
122 
123 	/** @aggr_wq: workqueue used to transmit queued OGM packets */
124 	struct delayed_work aggr_wq;
125 
126 	/** @aggr_list: queue for to be aggregated OGM packets */
127 	struct sk_buff_head aggr_list;
128 
129 	/** @aggr_len: size of the OGM aggregate (excluding ethernet header) */
130 	unsigned int aggr_len;
131 
132 	/**
133 	 * @throughput_override: throughput override to disable link
134 	 *  auto-detection
135 	 */
136 	atomic_t throughput_override;
137 
138 	/** @flags: interface specific flags */
139 	u8 flags;
140 };
141 
142 /**
143  * enum batadv_hard_iface_wifi_flags - Flags describing the wifi configuration
144  *  of a batadv_hard_iface
145  */
146 enum batadv_hard_iface_wifi_flags {
147 	/** @BATADV_HARDIF_WIFI_WEXT_DIRECT: it is a wext wifi device */
148 	BATADV_HARDIF_WIFI_WEXT_DIRECT = BIT(0),
149 
150 	/** @BATADV_HARDIF_WIFI_CFG80211_DIRECT: it is a cfg80211 wifi device */
151 	BATADV_HARDIF_WIFI_CFG80211_DIRECT = BIT(1),
152 
153 	/**
154 	 * @BATADV_HARDIF_WIFI_WEXT_INDIRECT: link device is a wext wifi device
155 	 */
156 	BATADV_HARDIF_WIFI_WEXT_INDIRECT = BIT(2),
157 
158 	/**
159 	 * @BATADV_HARDIF_WIFI_CFG80211_INDIRECT: link device is a cfg80211 wifi
160 	 * device
161 	 */
162 	BATADV_HARDIF_WIFI_CFG80211_INDIRECT = BIT(3),
163 };
164 
165 /**
166  * struct batadv_hard_iface - network device known to batman-adv
167  */
168 struct batadv_hard_iface {
169 	/** @list: list node for batadv_hardif_list */
170 	struct list_head list;
171 
172 	/** @if_status: status of the interface for batman-adv */
173 	char if_status;
174 
175 	/**
176 	 * @num_bcasts: number of payload re-broadcasts on this interface (ARQ)
177 	 */
178 	u8 num_bcasts;
179 
180 	/**
181 	 * @wifi_flags: flags whether this is (directly or indirectly) a wifi
182 	 *  interface
183 	 */
184 	u32 wifi_flags;
185 
186 	/** @net_dev: pointer to the net_device */
187 	struct net_device *net_dev;
188 
189 	/** @refcount: number of contexts the object is used */
190 	struct kref refcount;
191 
192 	/**
193 	 * @batman_adv_ptype: packet type describing packets that should be
194 	 * processed by batman-adv for this interface
195 	 */
196 	struct packet_type batman_adv_ptype;
197 
198 	/**
199 	 * @soft_iface: the batman-adv interface which uses this network
200 	 *  interface
201 	 */
202 	struct net_device *soft_iface;
203 
204 	/** @rcu: struct used for freeing in an RCU-safe manner */
205 	struct rcu_head rcu;
206 
207 	/**
208 	 * @hop_penalty: penalty which will be applied to the tq-field
209 	 * of an OGM received via this interface
210 	 */
211 	atomic_t hop_penalty;
212 
213 	/** @bat_iv: per hard-interface B.A.T.M.A.N. IV data */
214 	struct batadv_hard_iface_bat_iv bat_iv;
215 
216 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
217 	/** @bat_v: per hard-interface B.A.T.M.A.N. V data */
218 	struct batadv_hard_iface_bat_v bat_v;
219 #endif
220 
221 	/**
222 	 * @neigh_list: list of unique single hop neighbors via this interface
223 	 */
224 	struct hlist_head neigh_list;
225 
226 	/** @neigh_list_lock: lock protecting neigh_list */
227 	spinlock_t neigh_list_lock;
228 };
229 
230 /**
231  * struct batadv_orig_ifinfo_bat_iv - B.A.T.M.A.N. IV private orig_ifinfo
232  *  members
233  */
234 struct batadv_orig_ifinfo_bat_iv {
235 	/**
236 	 * @bcast_own: bitfield which counts the number of our OGMs this
237 	 * orig_node rebroadcasted "back" to us  (relative to last_real_seqno)
238 	 */
239 	DECLARE_BITMAP(bcast_own, BATADV_TQ_LOCAL_WINDOW_SIZE);
240 
241 	/** @bcast_own_sum: sum of bcast_own */
242 	u8 bcast_own_sum;
243 };
244 
245 /**
246  * struct batadv_orig_ifinfo - originator info per outgoing interface
247  */
248 struct batadv_orig_ifinfo {
249 	/** @list: list node for &batadv_orig_node.ifinfo_list */
250 	struct hlist_node list;
251 
252 	/** @if_outgoing: pointer to outgoing hard-interface */
253 	struct batadv_hard_iface *if_outgoing;
254 
255 	/** @router: router that should be used to reach this originator */
256 	struct batadv_neigh_node __rcu *router;
257 
258 	/** @last_real_seqno: last and best known sequence number */
259 	u32 last_real_seqno;
260 
261 	/** @last_ttl: ttl of last received packet */
262 	u8 last_ttl;
263 
264 	/** @last_seqno_forwarded: seqno of the OGM which was forwarded last */
265 	u32 last_seqno_forwarded;
266 
267 	/** @batman_seqno_reset: time when the batman seqno window was reset */
268 	unsigned long batman_seqno_reset;
269 
270 	/** @bat_iv: B.A.T.M.A.N. IV private structure */
271 	struct batadv_orig_ifinfo_bat_iv bat_iv;
272 
273 	/** @refcount: number of contexts the object is used */
274 	struct kref refcount;
275 
276 	/** @rcu: struct used for freeing in an RCU-safe manner */
277 	struct rcu_head rcu;
278 };
279 
280 /**
281  * struct batadv_frag_table_entry - head in the fragment buffer table
282  */
283 struct batadv_frag_table_entry {
284 	/** @fragment_list: head of list with fragments */
285 	struct hlist_head fragment_list;
286 
287 	/** @lock: lock to protect the list of fragments */
288 	spinlock_t lock;
289 
290 	/** @timestamp: time (jiffy) of last received fragment */
291 	unsigned long timestamp;
292 
293 	/** @seqno: sequence number of the fragments in the list */
294 	u16 seqno;
295 
296 	/** @size: accumulated size of packets in list */
297 	u16 size;
298 
299 	/** @total_size: expected size of the assembled packet */
300 	u16 total_size;
301 };
302 
303 /**
304  * struct batadv_frag_list_entry - entry in a list of fragments
305  */
306 struct batadv_frag_list_entry {
307 	/** @list: list node information */
308 	struct hlist_node list;
309 
310 	/** @skb: fragment */
311 	struct sk_buff *skb;
312 
313 	/** @no: fragment number in the set */
314 	u8 no;
315 };
316 
317 /**
318  * struct batadv_vlan_tt - VLAN specific TT attributes
319  */
320 struct batadv_vlan_tt {
321 	/** @crc: CRC32 checksum of the entries belonging to this vlan */
322 	u32 crc;
323 
324 	/** @num_entries: number of TT entries for this VLAN */
325 	atomic_t num_entries;
326 };
327 
328 /**
329  * struct batadv_orig_node_vlan - VLAN specific data per orig_node
330  */
331 struct batadv_orig_node_vlan {
332 	/** @vid: the VLAN identifier */
333 	unsigned short vid;
334 
335 	/** @tt: VLAN specific TT attributes */
336 	struct batadv_vlan_tt tt;
337 
338 	/** @list: list node for &batadv_orig_node.vlan_list */
339 	struct hlist_node list;
340 
341 	/**
342 	 * @refcount: number of context where this object is currently in use
343 	 */
344 	struct kref refcount;
345 
346 	/** @rcu: struct used for freeing in a RCU-safe manner */
347 	struct rcu_head rcu;
348 };
349 
350 /**
351  * struct batadv_orig_bat_iv - B.A.T.M.A.N. IV private orig_node members
352  */
353 struct batadv_orig_bat_iv {
354 	/**
355 	 * @ogm_cnt_lock: lock protecting &batadv_orig_ifinfo_bat_iv.bcast_own,
356 	 * &batadv_orig_ifinfo_bat_iv.bcast_own_sum,
357 	 * &batadv_neigh_ifinfo_bat_iv.bat_iv.real_bits and
358 	 * &batadv_neigh_ifinfo_bat_iv.real_packet_count
359 	 */
360 	spinlock_t ogm_cnt_lock;
361 };
362 
363 /**
364  * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh
365  */
366 struct batadv_orig_node {
367 	/** @orig: originator ethernet address */
368 	u8 orig[ETH_ALEN];
369 
370 	/** @ifinfo_list: list for routers per outgoing interface */
371 	struct hlist_head ifinfo_list;
372 
373 	/**
374 	 * @last_bonding_candidate: pointer to last ifinfo of last used router
375 	 */
376 	struct batadv_orig_ifinfo *last_bonding_candidate;
377 
378 #ifdef CONFIG_BATMAN_ADV_DAT
379 	/** @dat_addr: address of the orig node in the distributed hash */
380 	batadv_dat_addr_t dat_addr;
381 #endif
382 
383 	/** @last_seen: time when last packet from this node was received */
384 	unsigned long last_seen;
385 
386 	/**
387 	 * @bcast_seqno_reset: time when the broadcast seqno window was reset
388 	 */
389 	unsigned long bcast_seqno_reset;
390 
391 #ifdef CONFIG_BATMAN_ADV_MCAST
392 	/**
393 	 * @mcast_handler_lock: synchronizes mcast-capability and -flag changes
394 	 */
395 	spinlock_t mcast_handler_lock;
396 
397 	/** @mcast_flags: multicast flags announced by the orig node */
398 	u8 mcast_flags;
399 
400 	/**
401 	 * @mcast_want_all_unsnoopables_node: a list node for the
402 	 *  mcast.want_all_unsnoopables list
403 	 */
404 	struct hlist_node mcast_want_all_unsnoopables_node;
405 
406 	/**
407 	 * @mcast_want_all_ipv4_node: a list node for the mcast.want_all_ipv4
408 	 *  list
409 	 */
410 	struct hlist_node mcast_want_all_ipv4_node;
411 	/**
412 	 * @mcast_want_all_ipv6_node: a list node for the mcast.want_all_ipv6
413 	 *  list
414 	 */
415 	struct hlist_node mcast_want_all_ipv6_node;
416 
417 	/**
418 	 * @mcast_want_all_rtr4_node: a list node for the mcast.want_all_rtr4
419 	 *  list
420 	 */
421 	struct hlist_node mcast_want_all_rtr4_node;
422 	/**
423 	 * @mcast_want_all_rtr6_node: a list node for the mcast.want_all_rtr6
424 	 *  list
425 	 */
426 	struct hlist_node mcast_want_all_rtr6_node;
427 #endif
428 
429 	/** @capabilities: announced capabilities of this originator */
430 	unsigned long capabilities;
431 
432 	/**
433 	 * @capa_initialized: bitfield to remember whether a capability was
434 	 *  initialized
435 	 */
436 	unsigned long capa_initialized;
437 
438 	/** @last_ttvn: last seen translation table version number */
439 	atomic_t last_ttvn;
440 
441 	/** @tt_buff: last tt changeset this node received from the orig node */
442 	unsigned char *tt_buff;
443 
444 	/**
445 	 * @tt_buff_len: length of the last tt changeset this node received
446 	 *  from the orig node
447 	 */
448 	s16 tt_buff_len;
449 
450 	/** @tt_buff_lock: lock that protects tt_buff and tt_buff_len */
451 	spinlock_t tt_buff_lock;
452 
453 	/**
454 	 * @tt_lock: avoids concurrent read from and write to the table. Table
455 	 *  update is made up of two operations (data structure update and
456 	 *  metadata -CRC/TTVN-recalculation) and they have to be executed
457 	 *  atomically in order to avoid another thread to read the
458 	 *  table/metadata between those.
459 	 */
460 	spinlock_t tt_lock;
461 
462 	/**
463 	 * @bcast_bits: bitfield containing the info which payload broadcast
464 	 *  originated from this orig node this host already has seen (relative
465 	 *  to last_bcast_seqno)
466 	 */
467 	DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
468 
469 	/**
470 	 * @last_bcast_seqno: last broadcast sequence number received by this
471 	 *  host
472 	 */
473 	u32 last_bcast_seqno;
474 
475 	/**
476 	 * @neigh_list: list of potential next hop neighbor towards this orig
477 	 *  node
478 	 */
479 	struct hlist_head neigh_list;
480 
481 	/**
482 	 * @neigh_list_lock: lock protecting neigh_list, ifinfo_list,
483 	 *  last_bonding_candidate and router
484 	 */
485 	spinlock_t neigh_list_lock;
486 
487 	/** @hash_entry: hlist node for &batadv_priv.orig_hash */
488 	struct hlist_node hash_entry;
489 
490 	/** @bat_priv: pointer to soft_iface this orig node belongs to */
491 	struct batadv_priv *bat_priv;
492 
493 	/** @bcast_seqno_lock: lock protecting bcast_bits & last_bcast_seqno */
494 	spinlock_t bcast_seqno_lock;
495 
496 	/** @refcount: number of contexts the object is used */
497 	struct kref refcount;
498 
499 	/** @rcu: struct used for freeing in an RCU-safe manner */
500 	struct rcu_head rcu;
501 
502 #ifdef CONFIG_BATMAN_ADV_NC
503 	/** @in_coding_list: list of nodes this orig can hear */
504 	struct list_head in_coding_list;
505 
506 	/** @out_coding_list: list of nodes that can hear this orig */
507 	struct list_head out_coding_list;
508 
509 	/** @in_coding_list_lock: protects in_coding_list */
510 	spinlock_t in_coding_list_lock;
511 
512 	/** @out_coding_list_lock: protects out_coding_list */
513 	spinlock_t out_coding_list_lock;
514 #endif
515 
516 	/** @fragments: array with heads for fragment chains */
517 	struct batadv_frag_table_entry fragments[BATADV_FRAG_BUFFER_COUNT];
518 
519 	/**
520 	 * @vlan_list: a list of orig_node_vlan structs, one per VLAN served by
521 	 *  the originator represented by this object
522 	 */
523 	struct hlist_head vlan_list;
524 
525 	/** @vlan_list_lock: lock protecting vlan_list */
526 	spinlock_t vlan_list_lock;
527 
528 	/** @bat_iv: B.A.T.M.A.N. IV private structure */
529 	struct batadv_orig_bat_iv bat_iv;
530 };
531 
532 /**
533  * enum batadv_orig_capabilities - orig node capabilities
534  */
535 enum batadv_orig_capabilities {
536 	/**
537 	 * @BATADV_ORIG_CAPA_HAS_DAT: orig node has distributed arp table
538 	 *  enabled
539 	 */
540 	BATADV_ORIG_CAPA_HAS_DAT,
541 
542 	/** @BATADV_ORIG_CAPA_HAS_NC: orig node has network coding enabled */
543 	BATADV_ORIG_CAPA_HAS_NC,
544 
545 	/** @BATADV_ORIG_CAPA_HAS_TT: orig node has tt capability */
546 	BATADV_ORIG_CAPA_HAS_TT,
547 
548 	/**
549 	 * @BATADV_ORIG_CAPA_HAS_MCAST: orig node has some multicast capability
550 	 *  (= orig node announces a tvlv of type BATADV_TVLV_MCAST)
551 	 */
552 	BATADV_ORIG_CAPA_HAS_MCAST,
553 };
554 
555 /**
556  * struct batadv_gw_node - structure for orig nodes announcing gw capabilities
557  */
558 struct batadv_gw_node {
559 	/** @list: list node for &batadv_priv_gw.list */
560 	struct hlist_node list;
561 
562 	/** @orig_node: pointer to corresponding orig node */
563 	struct batadv_orig_node *orig_node;
564 
565 	/** @bandwidth_down: advertised uplink download bandwidth */
566 	u32 bandwidth_down;
567 
568 	/** @bandwidth_up: advertised uplink upload bandwidth */
569 	u32 bandwidth_up;
570 
571 	/** @refcount: number of contexts the object is used */
572 	struct kref refcount;
573 
574 	/** @rcu: struct used for freeing in an RCU-safe manner */
575 	struct rcu_head rcu;
576 };
577 
578 DECLARE_EWMA(throughput, 10, 8)
579 
580 /**
581  * struct batadv_hardif_neigh_node_bat_v - B.A.T.M.A.N. V private neighbor
582  *  information
583  */
584 struct batadv_hardif_neigh_node_bat_v {
585 	/** @throughput: ewma link throughput towards this neighbor */
586 	struct ewma_throughput throughput;
587 
588 	/** @elp_interval: time interval between two ELP transmissions */
589 	u32 elp_interval;
590 
591 	/** @elp_latest_seqno: latest and best known ELP sequence number */
592 	u32 elp_latest_seqno;
593 
594 	/**
595 	 * @last_unicast_tx: when the last unicast packet has been sent to this
596 	 *  neighbor
597 	 */
598 	unsigned long last_unicast_tx;
599 
600 	/** @metric_work: work queue callback item for metric update */
601 	struct work_struct metric_work;
602 };
603 
604 /**
605  * struct batadv_hardif_neigh_node - unique neighbor per hard-interface
606  */
607 struct batadv_hardif_neigh_node {
608 	/** @list: list node for &batadv_hard_iface.neigh_list */
609 	struct hlist_node list;
610 
611 	/** @addr: the MAC address of the neighboring interface */
612 	u8 addr[ETH_ALEN];
613 
614 	/**
615 	 * @orig: the address of the originator this neighbor node belongs to
616 	 */
617 	u8 orig[ETH_ALEN];
618 
619 	/** @if_incoming: pointer to incoming hard-interface */
620 	struct batadv_hard_iface *if_incoming;
621 
622 	/** @last_seen: when last packet via this neighbor was received */
623 	unsigned long last_seen;
624 
625 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
626 	/** @bat_v: B.A.T.M.A.N. V private data */
627 	struct batadv_hardif_neigh_node_bat_v bat_v;
628 #endif
629 
630 	/** @refcount: number of contexts the object is used */
631 	struct kref refcount;
632 
633 	/** @rcu: struct used for freeing in a RCU-safe manner */
634 	struct rcu_head rcu;
635 };
636 
637 /**
638  * struct batadv_neigh_node - structure for single hops neighbors
639  */
640 struct batadv_neigh_node {
641 	/** @list: list node for &batadv_orig_node.neigh_list */
642 	struct hlist_node list;
643 
644 	/** @orig_node: pointer to corresponding orig_node */
645 	struct batadv_orig_node *orig_node;
646 
647 	/** @addr: the MAC address of the neighboring interface */
648 	u8 addr[ETH_ALEN];
649 
650 	/** @ifinfo_list: list for routing metrics per outgoing interface */
651 	struct hlist_head ifinfo_list;
652 
653 	/** @ifinfo_lock: lock protecting ifinfo_list and its members */
654 	spinlock_t ifinfo_lock;
655 
656 	/** @if_incoming: pointer to incoming hard-interface */
657 	struct batadv_hard_iface *if_incoming;
658 
659 	/** @last_seen: when last packet via this neighbor was received */
660 	unsigned long last_seen;
661 
662 	/** @hardif_neigh: hardif_neigh of this neighbor */
663 	struct batadv_hardif_neigh_node *hardif_neigh;
664 
665 	/** @refcount: number of contexts the object is used */
666 	struct kref refcount;
667 
668 	/** @rcu: struct used for freeing in an RCU-safe manner */
669 	struct rcu_head rcu;
670 };
671 
672 /**
673  * struct batadv_neigh_ifinfo_bat_iv - neighbor information per outgoing
674  *  interface for B.A.T.M.A.N. IV
675  */
676 struct batadv_neigh_ifinfo_bat_iv {
677 	/** @tq_recv: ring buffer of received TQ values from this neigh node */
678 	u8 tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
679 
680 	/** @tq_index: ring buffer index */
681 	u8 tq_index;
682 
683 	/**
684 	 * @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv)
685 	 */
686 	u8 tq_avg;
687 
688 	/**
689 	 * @real_bits: bitfield containing the number of OGMs received from this
690 	 *  neigh node (relative to orig_node->last_real_seqno)
691 	 */
692 	DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
693 
694 	/** @real_packet_count: counted result of real_bits */
695 	u8 real_packet_count;
696 };
697 
698 /**
699  * struct batadv_neigh_ifinfo_bat_v - neighbor information per outgoing
700  *  interface for B.A.T.M.A.N. V
701  */
702 struct batadv_neigh_ifinfo_bat_v {
703 	/**
704 	 * @throughput: last throughput metric received from originator via this
705 	 *  neigh
706 	 */
707 	u32 throughput;
708 
709 	/** @last_seqno: last sequence number known for this neighbor */
710 	u32 last_seqno;
711 };
712 
713 /**
714  * struct batadv_neigh_ifinfo - neighbor information per outgoing interface
715  */
716 struct batadv_neigh_ifinfo {
717 	/** @list: list node for &batadv_neigh_node.ifinfo_list */
718 	struct hlist_node list;
719 
720 	/** @if_outgoing: pointer to outgoing hard-interface */
721 	struct batadv_hard_iface *if_outgoing;
722 
723 	/** @bat_iv: B.A.T.M.A.N. IV private structure */
724 	struct batadv_neigh_ifinfo_bat_iv bat_iv;
725 
726 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
727 	/** @bat_v: B.A.T.M.A.N. V private data */
728 	struct batadv_neigh_ifinfo_bat_v bat_v;
729 #endif
730 
731 	/** @last_ttl: last received ttl from this neigh node */
732 	u8 last_ttl;
733 
734 	/** @refcount: number of contexts the object is used */
735 	struct kref refcount;
736 
737 	/** @rcu: struct used for freeing in a RCU-safe manner */
738 	struct rcu_head rcu;
739 };
740 
741 #ifdef CONFIG_BATMAN_ADV_BLA
742 
743 /**
744  * struct batadv_bcast_duplist_entry - structure for LAN broadcast suppression
745  */
746 struct batadv_bcast_duplist_entry {
747 	/** @orig: mac address of orig node originating the broadcast */
748 	u8 orig[ETH_ALEN];
749 
750 	/** @crc: crc32 checksum of broadcast payload */
751 	__be32 crc;
752 
753 	/** @entrytime: time when the broadcast packet was received */
754 	unsigned long entrytime;
755 };
756 #endif
757 
758 /**
759  * enum batadv_counters - indices for traffic counters
760  */
761 enum batadv_counters {
762 	/** @BATADV_CNT_TX: transmitted payload traffic packet counter */
763 	BATADV_CNT_TX,
764 
765 	/** @BATADV_CNT_TX_BYTES: transmitted payload traffic bytes counter */
766 	BATADV_CNT_TX_BYTES,
767 
768 	/**
769 	 * @BATADV_CNT_TX_DROPPED: dropped transmission payload traffic packet
770 	 *  counter
771 	 */
772 	BATADV_CNT_TX_DROPPED,
773 
774 	/** @BATADV_CNT_RX: received payload traffic packet counter */
775 	BATADV_CNT_RX,
776 
777 	/** @BATADV_CNT_RX_BYTES: received payload traffic bytes counter */
778 	BATADV_CNT_RX_BYTES,
779 
780 	/** @BATADV_CNT_FORWARD: forwarded payload traffic packet counter */
781 	BATADV_CNT_FORWARD,
782 
783 	/**
784 	 * @BATADV_CNT_FORWARD_BYTES: forwarded payload traffic bytes counter
785 	 */
786 	BATADV_CNT_FORWARD_BYTES,
787 
788 	/**
789 	 * @BATADV_CNT_MGMT_TX: transmitted routing protocol traffic packet
790 	 *  counter
791 	 */
792 	BATADV_CNT_MGMT_TX,
793 
794 	/**
795 	 * @BATADV_CNT_MGMT_TX_BYTES: transmitted routing protocol traffic bytes
796 	 *  counter
797 	 */
798 	BATADV_CNT_MGMT_TX_BYTES,
799 
800 	/**
801 	 * @BATADV_CNT_MGMT_RX: received routing protocol traffic packet counter
802 	 */
803 	BATADV_CNT_MGMT_RX,
804 
805 	/**
806 	 * @BATADV_CNT_MGMT_RX_BYTES: received routing protocol traffic bytes
807 	 *  counter
808 	 */
809 	BATADV_CNT_MGMT_RX_BYTES,
810 
811 	/** @BATADV_CNT_FRAG_TX: transmitted fragment traffic packet counter */
812 	BATADV_CNT_FRAG_TX,
813 
814 	/**
815 	 * @BATADV_CNT_FRAG_TX_BYTES: transmitted fragment traffic bytes counter
816 	 */
817 	BATADV_CNT_FRAG_TX_BYTES,
818 
819 	/** @BATADV_CNT_FRAG_RX: received fragment traffic packet counter */
820 	BATADV_CNT_FRAG_RX,
821 
822 	/**
823 	 * @BATADV_CNT_FRAG_RX_BYTES: received fragment traffic bytes counter
824 	 */
825 	BATADV_CNT_FRAG_RX_BYTES,
826 
827 	/** @BATADV_CNT_FRAG_FWD: forwarded fragment traffic packet counter */
828 	BATADV_CNT_FRAG_FWD,
829 
830 	/**
831 	 * @BATADV_CNT_FRAG_FWD_BYTES: forwarded fragment traffic bytes counter
832 	 */
833 	BATADV_CNT_FRAG_FWD_BYTES,
834 
835 	/**
836 	 * @BATADV_CNT_TT_REQUEST_TX: transmitted tt req traffic packet counter
837 	 */
838 	BATADV_CNT_TT_REQUEST_TX,
839 
840 	/** @BATADV_CNT_TT_REQUEST_RX: received tt req traffic packet counter */
841 	BATADV_CNT_TT_REQUEST_RX,
842 
843 	/**
844 	 * @BATADV_CNT_TT_RESPONSE_TX: transmitted tt resp traffic packet
845 	 *  counter
846 	 */
847 	BATADV_CNT_TT_RESPONSE_TX,
848 
849 	/**
850 	 * @BATADV_CNT_TT_RESPONSE_RX: received tt resp traffic packet counter
851 	 */
852 	BATADV_CNT_TT_RESPONSE_RX,
853 
854 	/**
855 	 * @BATADV_CNT_TT_ROAM_ADV_TX: transmitted tt roam traffic packet
856 	 *  counter
857 	 */
858 	BATADV_CNT_TT_ROAM_ADV_TX,
859 
860 	/**
861 	 * @BATADV_CNT_TT_ROAM_ADV_RX: received tt roam traffic packet counter
862 	 */
863 	BATADV_CNT_TT_ROAM_ADV_RX,
864 
865 #ifdef CONFIG_BATMAN_ADV_MCAST
866 	/**
867 	 * @BATADV_CNT_MCAST_TX: transmitted batman-adv multicast packets
868 	 *  counter
869 	 */
870 	BATADV_CNT_MCAST_TX,
871 
872 	/**
873 	 * @BATADV_CNT_MCAST_TX_BYTES: transmitted batman-adv multicast packets
874 	 *  bytes counter
875 	 */
876 	BATADV_CNT_MCAST_TX_BYTES,
877 
878 	/**
879 	 * @BATADV_CNT_MCAST_TX_LOCAL: counter for multicast packets which
880 	 *  were locally encapsulated and transmitted as batman-adv multicast
881 	 *  packets
882 	 */
883 	BATADV_CNT_MCAST_TX_LOCAL,
884 
885 	/**
886 	 * @BATADV_CNT_MCAST_TX_LOCAL_BYTES: bytes counter for multicast packets
887 	 *  which were locally encapsulated and transmitted as batman-adv
888 	 *  multicast packets
889 	 */
890 	BATADV_CNT_MCAST_TX_LOCAL_BYTES,
891 
892 	/**
893 	 * @BATADV_CNT_MCAST_RX: received batman-adv multicast packet counter
894 	 */
895 	BATADV_CNT_MCAST_RX,
896 
897 	/**
898 	 * @BATADV_CNT_MCAST_RX_BYTES: received batman-adv multicast packet
899 	 *  bytes counter
900 	 */
901 	BATADV_CNT_MCAST_RX_BYTES,
902 
903 	/**
904 	 * @BATADV_CNT_MCAST_RX_LOCAL: counter for received batman-adv multicast
905 	 *  packets which were forwarded to the local soft interface
906 	 */
907 	BATADV_CNT_MCAST_RX_LOCAL,
908 
909 	/**
910 	 * @BATADV_CNT_MCAST_RX_LOCAL_BYTES: bytes counter for received
911 	 *  batman-adv multicast packets which were forwarded to the local soft
912 	 *  interface
913 	 */
914 	BATADV_CNT_MCAST_RX_LOCAL_BYTES,
915 
916 	/**
917 	 * @BATADV_CNT_MCAST_FWD: counter for received batman-adv multicast
918 	 *  packets which were forwarded to other, neighboring nodes
919 	 */
920 	BATADV_CNT_MCAST_FWD,
921 
922 	/**
923 	 * @BATADV_CNT_MCAST_FWD_BYTES: bytes counter for received batman-adv
924 	 *  multicast packets which were forwarded to other, neighboring nodes
925 	 */
926 	BATADV_CNT_MCAST_FWD_BYTES,
927 #endif
928 
929 #ifdef CONFIG_BATMAN_ADV_DAT
930 	/**
931 	 * @BATADV_CNT_DAT_GET_TX: transmitted dht GET traffic packet counter
932 	 */
933 	BATADV_CNT_DAT_GET_TX,
934 
935 	/** @BATADV_CNT_DAT_GET_RX: received dht GET traffic packet counter */
936 	BATADV_CNT_DAT_GET_RX,
937 
938 	/**
939 	 * @BATADV_CNT_DAT_PUT_TX: transmitted dht PUT traffic packet counter
940 	 */
941 	BATADV_CNT_DAT_PUT_TX,
942 
943 	/** @BATADV_CNT_DAT_PUT_RX: received dht PUT traffic packet counter */
944 	BATADV_CNT_DAT_PUT_RX,
945 
946 	/**
947 	 * @BATADV_CNT_DAT_CACHED_REPLY_TX: transmitted dat cache reply traffic
948 	 *  packet counter
949 	 */
950 	BATADV_CNT_DAT_CACHED_REPLY_TX,
951 #endif
952 
953 #ifdef CONFIG_BATMAN_ADV_NC
954 	/**
955 	 * @BATADV_CNT_NC_CODE: transmitted nc-combined traffic packet counter
956 	 */
957 	BATADV_CNT_NC_CODE,
958 
959 	/**
960 	 * @BATADV_CNT_NC_CODE_BYTES: transmitted nc-combined traffic bytes
961 	 *  counter
962 	 */
963 	BATADV_CNT_NC_CODE_BYTES,
964 
965 	/**
966 	 * @BATADV_CNT_NC_RECODE: transmitted nc-recombined traffic packet
967 	 *  counter
968 	 */
969 	BATADV_CNT_NC_RECODE,
970 
971 	/**
972 	 * @BATADV_CNT_NC_RECODE_BYTES: transmitted nc-recombined traffic bytes
973 	 *  counter
974 	 */
975 	BATADV_CNT_NC_RECODE_BYTES,
976 
977 	/**
978 	 * @BATADV_CNT_NC_BUFFER: counter for packets buffered for later nc
979 	 *  decoding
980 	 */
981 	BATADV_CNT_NC_BUFFER,
982 
983 	/**
984 	 * @BATADV_CNT_NC_DECODE: received and nc-decoded traffic packet counter
985 	 */
986 	BATADV_CNT_NC_DECODE,
987 
988 	/**
989 	 * @BATADV_CNT_NC_DECODE_BYTES: received and nc-decoded traffic bytes
990 	 *  counter
991 	 */
992 	BATADV_CNT_NC_DECODE_BYTES,
993 
994 	/**
995 	 * @BATADV_CNT_NC_DECODE_FAILED: received and decode-failed traffic
996 	 *  packet counter
997 	 */
998 	BATADV_CNT_NC_DECODE_FAILED,
999 
1000 	/**
1001 	 * @BATADV_CNT_NC_SNIFFED: counter for nc-decoded packets received in
1002 	 *  promisc mode.
1003 	 */
1004 	BATADV_CNT_NC_SNIFFED,
1005 #endif
1006 
1007 	/** @BATADV_CNT_NUM: number of traffic counters */
1008 	BATADV_CNT_NUM,
1009 };
1010 
1011 /**
1012  * struct batadv_priv_tt - per mesh interface translation table data
1013  */
1014 struct batadv_priv_tt {
1015 	/** @vn: translation table version number */
1016 	atomic_t vn;
1017 
1018 	/**
1019 	 * @ogm_append_cnt: counter of number of OGMs containing the local tt
1020 	 *  diff
1021 	 */
1022 	atomic_t ogm_append_cnt;
1023 
1024 	/** @local_changes: changes registered in an originator interval */
1025 	atomic_t local_changes;
1026 
1027 	/**
1028 	 * @changes_list: tracks tt local changes within an originator interval
1029 	 */
1030 	struct list_head changes_list;
1031 
1032 	/** @local_hash: local translation table hash table */
1033 	struct batadv_hashtable *local_hash;
1034 
1035 	/** @global_hash: global translation table hash table */
1036 	struct batadv_hashtable *global_hash;
1037 
1038 	/** @req_list: list of pending & unanswered tt_requests */
1039 	struct hlist_head req_list;
1040 
1041 	/**
1042 	 * @roam_list: list of the last roaming events of each client limiting
1043 	 *  the number of roaming events to avoid route flapping
1044 	 */
1045 	struct list_head roam_list;
1046 
1047 	/** @changes_list_lock: lock protecting changes_list */
1048 	spinlock_t changes_list_lock;
1049 
1050 	/** @req_list_lock: lock protecting req_list */
1051 	spinlock_t req_list_lock;
1052 
1053 	/** @roam_list_lock: lock protecting roam_list */
1054 	spinlock_t roam_list_lock;
1055 
1056 	/** @last_changeset: last tt changeset this host has generated */
1057 	unsigned char *last_changeset;
1058 
1059 	/**
1060 	 * @last_changeset_len: length of last tt changeset this host has
1061 	 *  generated
1062 	 */
1063 	s16 last_changeset_len;
1064 
1065 	/**
1066 	 * @last_changeset_lock: lock protecting last_changeset &
1067 	 *  last_changeset_len
1068 	 */
1069 	spinlock_t last_changeset_lock;
1070 
1071 	/**
1072 	 * @commit_lock: prevents from executing a local TT commit while reading
1073 	 *  the local table. The local TT commit is made up of two operations
1074 	 *  (data structure update and metadata -CRC/TTVN- recalculation) and
1075 	 *  they have to be executed atomically in order to avoid another thread
1076 	 *  to read the table/metadata between those.
1077 	 */
1078 	spinlock_t commit_lock;
1079 
1080 	/** @work: work queue callback item for translation table purging */
1081 	struct delayed_work work;
1082 };
1083 
1084 #ifdef CONFIG_BATMAN_ADV_BLA
1085 
1086 /**
1087  * struct batadv_priv_bla - per mesh interface bridge loop avoidance data
1088  */
1089 struct batadv_priv_bla {
1090 	/** @num_requests: number of bla requests in flight */
1091 	atomic_t num_requests;
1092 
1093 	/**
1094 	 * @claim_hash: hash table containing mesh nodes this host has claimed
1095 	 */
1096 	struct batadv_hashtable *claim_hash;
1097 
1098 	/**
1099 	 * @backbone_hash: hash table containing all detected backbone gateways
1100 	 */
1101 	struct batadv_hashtable *backbone_hash;
1102 
1103 	/** @loopdetect_addr: MAC address used for own loopdetection frames */
1104 	u8 loopdetect_addr[ETH_ALEN];
1105 
1106 	/**
1107 	 * @loopdetect_lasttime: time when the loopdetection frames were sent
1108 	 */
1109 	unsigned long loopdetect_lasttime;
1110 
1111 	/**
1112 	 * @loopdetect_next: how many periods to wait for the next loopdetect
1113 	 *  process
1114 	 */
1115 	atomic_t loopdetect_next;
1116 
1117 	/**
1118 	 * @bcast_duplist: recently received broadcast packets array (for
1119 	 *  broadcast duplicate suppression)
1120 	 */
1121 	struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE];
1122 
1123 	/**
1124 	 * @bcast_duplist_curr: index of last broadcast packet added to
1125 	 *  bcast_duplist
1126 	 */
1127 	int bcast_duplist_curr;
1128 
1129 	/**
1130 	 * @bcast_duplist_lock: lock protecting bcast_duplist &
1131 	 *  bcast_duplist_curr
1132 	 */
1133 	spinlock_t bcast_duplist_lock;
1134 
1135 	/** @claim_dest: local claim data (e.g. claim group) */
1136 	struct batadv_bla_claim_dst claim_dest;
1137 
1138 	/** @work: work queue callback item for cleanups & bla announcements */
1139 	struct delayed_work work;
1140 };
1141 #endif
1142 
1143 #ifdef CONFIG_BATMAN_ADV_DEBUG
1144 
1145 /**
1146  * struct batadv_priv_debug_log - debug logging data
1147  */
1148 struct batadv_priv_debug_log {
1149 	/** @log_buff: buffer holding the logs (ring buffer) */
1150 	char log_buff[BATADV_LOG_BUF_LEN];
1151 
1152 	/** @log_start: index of next character to read */
1153 	unsigned long log_start;
1154 
1155 	/** @log_end: index of next character to write */
1156 	unsigned long log_end;
1157 
1158 	/** @lock: lock protecting log_buff, log_start & log_end */
1159 	spinlock_t lock;
1160 
1161 	/** @queue_wait: log reader's wait queue */
1162 	wait_queue_head_t queue_wait;
1163 };
1164 #endif
1165 
1166 /**
1167  * struct batadv_priv_gw - per mesh interface gateway data
1168  */
1169 struct batadv_priv_gw {
1170 	/** @gateway_list: list of available gateway nodes */
1171 	struct hlist_head gateway_list;
1172 
1173 	/** @list_lock: lock protecting gateway_list, curr_gw, generation */
1174 	spinlock_t list_lock;
1175 
1176 	/** @curr_gw: pointer to currently selected gateway node */
1177 	struct batadv_gw_node __rcu *curr_gw;
1178 
1179 	/** @generation: current (generation) sequence number */
1180 	unsigned int generation;
1181 
1182 	/**
1183 	 * @mode: gateway operation: off, client or server (see batadv_gw_modes)
1184 	 */
1185 	atomic_t mode;
1186 
1187 	/** @sel_class: gateway selection class (applies if gw_mode client) */
1188 	atomic_t sel_class;
1189 
1190 	/**
1191 	 * @bandwidth_down: advertised uplink download bandwidth (if gw_mode
1192 	 *  server)
1193 	 */
1194 	atomic_t bandwidth_down;
1195 
1196 	/**
1197 	 * @bandwidth_up: advertised uplink upload bandwidth (if gw_mode server)
1198 	 */
1199 	atomic_t bandwidth_up;
1200 
1201 	/** @reselect: bool indicating a gateway re-selection is in progress */
1202 	atomic_t reselect;
1203 };
1204 
1205 /**
1206  * struct batadv_priv_tvlv - per mesh interface tvlv data
1207  */
1208 struct batadv_priv_tvlv {
1209 	/**
1210 	 * @container_list: list of registered tvlv containers to be sent with
1211 	 *  each OGM
1212 	 */
1213 	struct hlist_head container_list;
1214 
1215 	/** @handler_list: list of the various tvlv content handlers */
1216 	struct hlist_head handler_list;
1217 
1218 	/** @container_list_lock: protects tvlv container list access */
1219 	spinlock_t container_list_lock;
1220 
1221 	/** @handler_list_lock: protects handler list access */
1222 	spinlock_t handler_list_lock;
1223 };
1224 
1225 #ifdef CONFIG_BATMAN_ADV_DAT
1226 
1227 /**
1228  * struct batadv_priv_dat - per mesh interface DAT private data
1229  */
1230 struct batadv_priv_dat {
1231 	/** @addr: node DAT address */
1232 	batadv_dat_addr_t addr;
1233 
1234 	/** @hash: hashtable representing the local ARP cache */
1235 	struct batadv_hashtable *hash;
1236 
1237 	/** @work: work queue callback item for cache purging */
1238 	struct delayed_work work;
1239 };
1240 #endif
1241 
1242 #ifdef CONFIG_BATMAN_ADV_MCAST
1243 /**
1244  * struct batadv_mcast_querier_state - IGMP/MLD querier state when bridged
1245  */
1246 struct batadv_mcast_querier_state {
1247 	/** @exists: whether a querier exists in the mesh */
1248 	unsigned char exists:1;
1249 
1250 	/**
1251 	 * @shadowing: if a querier exists, whether it is potentially shadowing
1252 	 *  multicast listeners (i.e. querier is behind our own bridge segment)
1253 	 */
1254 	unsigned char shadowing:1;
1255 };
1256 
1257 /**
1258  * struct batadv_mcast_mla_flags - flags for the querier, bridge and tvlv state
1259  */
1260 struct batadv_mcast_mla_flags {
1261 	/** @querier_ipv4: the current state of an IGMP querier in the mesh */
1262 	struct batadv_mcast_querier_state querier_ipv4;
1263 
1264 	/** @querier_ipv6: the current state of an MLD querier in the mesh */
1265 	struct batadv_mcast_querier_state querier_ipv6;
1266 
1267 	/** @enabled: whether the multicast tvlv is currently enabled */
1268 	unsigned char enabled:1;
1269 
1270 	/** @bridged: whether the soft interface has a bridge on top */
1271 	unsigned char bridged:1;
1272 
1273 	/** @tvlv_flags: the flags we have last sent in our mcast tvlv */
1274 	u8 tvlv_flags;
1275 };
1276 
1277 /**
1278  * struct batadv_priv_mcast - per mesh interface mcast data
1279  */
1280 struct batadv_priv_mcast {
1281 	/**
1282 	 * @mla_list: list of multicast addresses we are currently announcing
1283 	 *  via TT
1284 	 */
1285 	struct hlist_head mla_list; /* see __batadv_mcast_mla_update() */
1286 
1287 	/**
1288 	 * @want_all_unsnoopables_list: a list of orig_nodes wanting all
1289 	 *  unsnoopable multicast traffic
1290 	 */
1291 	struct hlist_head want_all_unsnoopables_list;
1292 
1293 	/**
1294 	 * @want_all_ipv4_list: a list of orig_nodes wanting all IPv4 multicast
1295 	 *  traffic
1296 	 */
1297 	struct hlist_head want_all_ipv4_list;
1298 
1299 	/**
1300 	 * @want_all_ipv6_list: a list of orig_nodes wanting all IPv6 multicast
1301 	 *  traffic
1302 	 */
1303 	struct hlist_head want_all_ipv6_list;
1304 
1305 	/**
1306 	 * @want_all_rtr4_list: a list of orig_nodes wanting all routable IPv4
1307 	 *  multicast traffic
1308 	 */
1309 	struct hlist_head want_all_rtr4_list;
1310 
1311 	/**
1312 	 * @want_all_rtr6_list: a list of orig_nodes wanting all routable IPv6
1313 	 *  multicast traffic
1314 	 */
1315 	struct hlist_head want_all_rtr6_list;
1316 
1317 	/**
1318 	 * @mla_flags: flags for the querier, bridge and tvlv state
1319 	 */
1320 	struct batadv_mcast_mla_flags mla_flags;
1321 
1322 	/**
1323 	 * @mla_lock: a lock protecting mla_list and mla_flags
1324 	 */
1325 	spinlock_t mla_lock;
1326 
1327 	/**
1328 	 * @num_want_all_unsnoopables: number of nodes wanting unsnoopable IP
1329 	 *  traffic
1330 	 */
1331 	atomic_t num_want_all_unsnoopables;
1332 
1333 	/** @num_want_all_ipv4: counter for items in want_all_ipv4_list */
1334 	atomic_t num_want_all_ipv4;
1335 
1336 	/** @num_want_all_ipv6: counter for items in want_all_ipv6_list */
1337 	atomic_t num_want_all_ipv6;
1338 
1339 	/** @num_want_all_rtr4: counter for items in want_all_rtr4_list */
1340 	atomic_t num_want_all_rtr4;
1341 
1342 	/** @num_want_all_rtr6: counter for items in want_all_rtr6_list */
1343 	atomic_t num_want_all_rtr6;
1344 
1345 	/**
1346 	 * @num_no_mc_ptype_capa: counter for number of nodes without the
1347 	 *  BATADV_MCAST_HAVE_MC_PTYPE_CAPA flag
1348 	 */
1349 	atomic_t num_no_mc_ptype_capa;
1350 
1351 	/**
1352 	 * @want_lists_lock: lock for protecting modifications to mcasts
1353 	 *  want_all_{unsnoopables,ipv4,ipv6}_list (traversals are rcu-locked)
1354 	 */
1355 	spinlock_t want_lists_lock;
1356 
1357 	/** @work: work queue callback item for multicast TT and TVLV updates */
1358 	struct delayed_work work;
1359 };
1360 #endif
1361 
1362 /**
1363  * struct batadv_priv_nc - per mesh interface network coding private data
1364  */
1365 struct batadv_priv_nc {
1366 	/** @work: work queue callback item for cleanup */
1367 	struct delayed_work work;
1368 
1369 	/**
1370 	 * @min_tq: only consider neighbors for encoding if neigh_tq > min_tq
1371 	 */
1372 	u8 min_tq;
1373 
1374 	/**
1375 	 * @max_fwd_delay: maximum packet forward delay to allow coding of
1376 	 *  packets
1377 	 */
1378 	u32 max_fwd_delay;
1379 
1380 	/**
1381 	 * @max_buffer_time: buffer time for sniffed packets used to decoding
1382 	 */
1383 	u32 max_buffer_time;
1384 
1385 	/**
1386 	 * @timestamp_fwd_flush: timestamp of last forward packet queue flush
1387 	 */
1388 	unsigned long timestamp_fwd_flush;
1389 
1390 	/**
1391 	 * @timestamp_sniffed_purge: timestamp of last sniffed packet queue
1392 	 *  purge
1393 	 */
1394 	unsigned long timestamp_sniffed_purge;
1395 
1396 	/**
1397 	 * @coding_hash: Hash table used to buffer skbs while waiting for
1398 	 *  another incoming skb to code it with. Skbs are added to the buffer
1399 	 *  just before being forwarded in routing.c
1400 	 */
1401 	struct batadv_hashtable *coding_hash;
1402 
1403 	/**
1404 	 * @decoding_hash: Hash table used to buffer skbs that might be needed
1405 	 *  to decode a received coded skb. The buffer is used for 1) skbs
1406 	 *  arriving on the soft-interface; 2) skbs overheard on the
1407 	 *  hard-interface; and 3) skbs forwarded by batman-adv.
1408 	 */
1409 	struct batadv_hashtable *decoding_hash;
1410 };
1411 
1412 /**
1413  * struct batadv_tp_unacked - unacked packet meta-information
1414  *
1415  * This struct is supposed to represent a buffer unacked packet. However, since
1416  * the purpose of the TP meter is to count the traffic only, there is no need to
1417  * store the entire sk_buff, the starting offset and the length are enough
1418  */
1419 struct batadv_tp_unacked {
1420 	/** @seqno: seqno of the unacked packet */
1421 	u32 seqno;
1422 
1423 	/** @len: length of the packet */
1424 	u16 len;
1425 
1426 	/** @list: list node for &batadv_tp_vars.unacked_list */
1427 	struct list_head list;
1428 };
1429 
1430 /**
1431  * enum batadv_tp_meter_role - Modus in tp meter session
1432  */
1433 enum batadv_tp_meter_role {
1434 	/** @BATADV_TP_RECEIVER: Initialized as receiver */
1435 	BATADV_TP_RECEIVER,
1436 
1437 	/** @BATADV_TP_SENDER: Initialized as sender */
1438 	BATADV_TP_SENDER
1439 };
1440 
1441 /**
1442  * struct batadv_tp_vars - tp meter private variables per session
1443  */
1444 struct batadv_tp_vars {
1445 	/** @list: list node for &bat_priv.tp_list */
1446 	struct hlist_node list;
1447 
1448 	/** @timer: timer for ack (receiver) and retry (sender) */
1449 	struct timer_list timer;
1450 
1451 	/** @bat_priv: pointer to the mesh object */
1452 	struct batadv_priv *bat_priv;
1453 
1454 	/** @start_time: start time in jiffies */
1455 	unsigned long start_time;
1456 
1457 	/** @other_end: mac address of remote */
1458 	u8 other_end[ETH_ALEN];
1459 
1460 	/** @role: receiver/sender modi */
1461 	enum batadv_tp_meter_role role;
1462 
1463 	/** @sending: sending binary semaphore: 1 if sending, 0 is not */
1464 	atomic_t sending;
1465 
1466 	/** @reason: reason for a stopped session */
1467 	enum batadv_tp_meter_reason reason;
1468 
1469 	/** @finish_work: work item for the finishing procedure */
1470 	struct delayed_work finish_work;
1471 
1472 	/** @test_length: test length in milliseconds */
1473 	u32 test_length;
1474 
1475 	/** @session: TP session identifier */
1476 	u8 session[2];
1477 
1478 	/** @icmp_uid: local ICMP "socket" index */
1479 	u8 icmp_uid;
1480 
1481 	/* sender variables */
1482 
1483 	/** @dec_cwnd: decimal part of the cwnd used during linear growth */
1484 	u16 dec_cwnd;
1485 
1486 	/** @cwnd: current size of the congestion window */
1487 	u32 cwnd;
1488 
1489 	/** @cwnd_lock: lock do protect @cwnd & @dec_cwnd */
1490 	spinlock_t cwnd_lock;
1491 
1492 	/**
1493 	 * @ss_threshold: Slow Start threshold. Once cwnd exceeds this value the
1494 	 *  connection switches to the Congestion Avoidance state
1495 	 */
1496 	u32 ss_threshold;
1497 
1498 	/** @last_acked: last acked byte */
1499 	atomic_t last_acked;
1500 
1501 	/** @last_sent: last sent byte, not yet acked */
1502 	u32 last_sent;
1503 
1504 	/** @tot_sent: amount of data sent/ACKed so far */
1505 	atomic64_t tot_sent;
1506 
1507 	/** @dup_acks: duplicate ACKs counter */
1508 	atomic_t dup_acks;
1509 
1510 	/** @fast_recovery: true if in Fast Recovery mode */
1511 	unsigned char fast_recovery:1;
1512 
1513 	/** @recover: last sent seqno when entering Fast Recovery */
1514 	u32 recover;
1515 
1516 	/** @rto: sender timeout */
1517 	u32 rto;
1518 
1519 	/** @srtt: smoothed RTT scaled by 2^3 */
1520 	u32 srtt;
1521 
1522 	/** @rttvar: RTT variation scaled by 2^2 */
1523 	u32 rttvar;
1524 
1525 	/**
1526 	 * @more_bytes: waiting queue anchor when waiting for more ack/retry
1527 	 *  timeout
1528 	 */
1529 	wait_queue_head_t more_bytes;
1530 
1531 	/** @prerandom_offset: offset inside the prerandom buffer */
1532 	u32 prerandom_offset;
1533 
1534 	/** @prerandom_lock: spinlock protecting access to prerandom_offset */
1535 	spinlock_t prerandom_lock;
1536 
1537 	/* receiver variables */
1538 
1539 	/** @last_recv: last in-order received packet */
1540 	u32 last_recv;
1541 
1542 	/** @unacked_list: list of unacked packets (meta-info only) */
1543 	struct list_head unacked_list;
1544 
1545 	/** @unacked_lock: protect unacked_list */
1546 	spinlock_t unacked_lock;
1547 
1548 	/** @last_recv_time: time (jiffies) a msg was received */
1549 	unsigned long last_recv_time;
1550 
1551 	/** @refcount: number of context where the object is used */
1552 	struct kref refcount;
1553 
1554 	/** @rcu: struct used for freeing in an RCU-safe manner */
1555 	struct rcu_head rcu;
1556 };
1557 
1558 /**
1559  * struct batadv_softif_vlan - per VLAN attributes set
1560  */
1561 struct batadv_softif_vlan {
1562 	/** @bat_priv: pointer to the mesh object */
1563 	struct batadv_priv *bat_priv;
1564 
1565 	/** @vid: VLAN identifier */
1566 	unsigned short vid;
1567 
1568 	/** @ap_isolation: AP isolation state */
1569 	atomic_t ap_isolation;		/* boolean */
1570 
1571 	/** @tt: TT private attributes (VLAN specific) */
1572 	struct batadv_vlan_tt tt;
1573 
1574 	/** @list: list node for &bat_priv.softif_vlan_list */
1575 	struct hlist_node list;
1576 
1577 	/**
1578 	 * @refcount: number of context where this object is currently in use
1579 	 */
1580 	struct kref refcount;
1581 
1582 	/** @rcu: struct used for freeing in a RCU-safe manner */
1583 	struct rcu_head rcu;
1584 };
1585 
1586 /**
1587  * struct batadv_priv_bat_v - B.A.T.M.A.N. V per soft-interface private data
1588  */
1589 struct batadv_priv_bat_v {
1590 	/** @ogm_buff: buffer holding the OGM packet */
1591 	unsigned char *ogm_buff;
1592 
1593 	/** @ogm_buff_len: length of the OGM packet buffer */
1594 	int ogm_buff_len;
1595 
1596 	/** @ogm_seqno: OGM sequence number - used to identify each OGM */
1597 	atomic_t ogm_seqno;
1598 
1599 	/** @ogm_buff_mutex: lock protecting ogm_buff and ogm_buff_len */
1600 	struct mutex ogm_buff_mutex;
1601 
1602 	/** @ogm_wq: workqueue used to schedule OGM transmissions */
1603 	struct delayed_work ogm_wq;
1604 };
1605 
1606 /**
1607  * struct batadv_priv - per mesh interface data
1608  */
1609 struct batadv_priv {
1610 	/**
1611 	 * @mesh_state: current status of the mesh
1612 	 *  (inactive/active/deactivating)
1613 	 */
1614 	atomic_t mesh_state;
1615 
1616 	/** @soft_iface: net device which holds this struct as private data */
1617 	struct net_device *soft_iface;
1618 
1619 	/**
1620 	 * @mtu_set_by_user: MTU was set once by user
1621 	 * protected by rtnl_lock
1622 	 */
1623 	int mtu_set_by_user;
1624 
1625 	/**
1626 	 * @bat_counters: mesh internal traffic statistic counters (see
1627 	 *  batadv_counters)
1628 	 */
1629 	u64 __percpu *bat_counters; /* Per cpu counters */
1630 
1631 	/**
1632 	 * @aggregated_ogms: bool indicating whether OGM aggregation is enabled
1633 	 */
1634 	atomic_t aggregated_ogms;
1635 
1636 	/** @bonding: bool indicating whether traffic bonding is enabled */
1637 	atomic_t bonding;
1638 
1639 	/**
1640 	 * @fragmentation: bool indicating whether traffic fragmentation is
1641 	 *  enabled
1642 	 */
1643 	atomic_t fragmentation;
1644 
1645 	/**
1646 	 * @packet_size_max: max packet size that can be transmitted via
1647 	 *  multiple fragmented skbs or a single frame if fragmentation is
1648 	 *  disabled
1649 	 */
1650 	atomic_t packet_size_max;
1651 
1652 	/**
1653 	 * @frag_seqno: incremental counter to identify chains of egress
1654 	 *  fragments
1655 	 */
1656 	atomic_t frag_seqno;
1657 
1658 #ifdef CONFIG_BATMAN_ADV_BLA
1659 	/**
1660 	 * @bridge_loop_avoidance: bool indicating whether bridge loop
1661 	 *  avoidance is enabled
1662 	 */
1663 	atomic_t bridge_loop_avoidance;
1664 #endif
1665 
1666 #ifdef CONFIG_BATMAN_ADV_DAT
1667 	/**
1668 	 * @distributed_arp_table: bool indicating whether distributed ARP table
1669 	 *  is enabled
1670 	 */
1671 	atomic_t distributed_arp_table;
1672 #endif
1673 
1674 #ifdef CONFIG_BATMAN_ADV_MCAST
1675 	/**
1676 	 * @multicast_mode: Enable or disable multicast optimizations on this
1677 	 *  node's sender/originating side
1678 	 */
1679 	atomic_t multicast_mode;
1680 
1681 	/**
1682 	 * @multicast_fanout: Maximum number of packet copies to generate for a
1683 	 *  multicast-to-unicast conversion
1684 	 */
1685 	atomic_t multicast_fanout;
1686 #endif
1687 
1688 	/** @orig_interval: OGM broadcast interval in milliseconds */
1689 	atomic_t orig_interval;
1690 
1691 	/**
1692 	 * @hop_penalty: penalty which will be applied to an OGM's tq-field on
1693 	 *  every hop
1694 	 */
1695 	atomic_t hop_penalty;
1696 
1697 #ifdef CONFIG_BATMAN_ADV_DEBUG
1698 	/** @log_level: configured log level (see batadv_dbg_level) */
1699 	atomic_t log_level;
1700 #endif
1701 
1702 	/**
1703 	 * @isolation_mark: the skb->mark value used to match packets for AP
1704 	 *  isolation
1705 	 */
1706 	u32 isolation_mark;
1707 
1708 	/**
1709 	 * @isolation_mark_mask: bitmask identifying the bits in skb->mark to be
1710 	 *  used for the isolation mark
1711 	 */
1712 	u32 isolation_mark_mask;
1713 
1714 	/** @bcast_seqno: last sent broadcast packet sequence number */
1715 	atomic_t bcast_seqno;
1716 
1717 	/**
1718 	 * @bcast_queue_left: number of remaining buffered broadcast packet
1719 	 *  slots
1720 	 */
1721 	atomic_t bcast_queue_left;
1722 
1723 	/** @batman_queue_left: number of remaining OGM packet slots */
1724 	atomic_t batman_queue_left;
1725 
1726 	/** @forw_bat_list: list of aggregated OGMs that will be forwarded */
1727 	struct hlist_head forw_bat_list;
1728 
1729 	/**
1730 	 * @forw_bcast_list: list of broadcast packets that will be
1731 	 *  rebroadcasted
1732 	 */
1733 	struct hlist_head forw_bcast_list;
1734 
1735 	/** @tp_list: list of tp sessions */
1736 	struct hlist_head tp_list;
1737 
1738 	/** @orig_hash: hash table containing mesh participants (orig nodes) */
1739 	struct batadv_hashtable *orig_hash;
1740 
1741 	/** @forw_bat_list_lock: lock protecting forw_bat_list */
1742 	spinlock_t forw_bat_list_lock;
1743 
1744 	/** @forw_bcast_list_lock: lock protecting forw_bcast_list */
1745 	spinlock_t forw_bcast_list_lock;
1746 
1747 	/** @tp_list_lock: spinlock protecting @tp_list */
1748 	spinlock_t tp_list_lock;
1749 
1750 	/** @tp_num: number of currently active tp sessions */
1751 	atomic_t tp_num;
1752 
1753 	/** @orig_work: work queue callback item for orig node purging */
1754 	struct delayed_work orig_work;
1755 
1756 	/**
1757 	 * @primary_if: one of the hard-interfaces assigned to this mesh
1758 	 *  interface becomes the primary interface
1759 	 */
1760 	struct batadv_hard_iface __rcu *primary_if;  /* rcu protected pointer */
1761 
1762 	/** @algo_ops: routing algorithm used by this mesh interface */
1763 	struct batadv_algo_ops *algo_ops;
1764 
1765 	/**
1766 	 * @softif_vlan_list: a list of softif_vlan structs, one per VLAN
1767 	 *  created on top of the mesh interface represented by this object
1768 	 */
1769 	struct hlist_head softif_vlan_list;
1770 
1771 	/** @softif_vlan_list_lock: lock protecting softif_vlan_list */
1772 	spinlock_t softif_vlan_list_lock;
1773 
1774 #ifdef CONFIG_BATMAN_ADV_BLA
1775 	/** @bla: bridge loop avoidance data */
1776 	struct batadv_priv_bla bla;
1777 #endif
1778 
1779 #ifdef CONFIG_BATMAN_ADV_DEBUG
1780 	/** @debug_log: holding debug logging relevant data */
1781 	struct batadv_priv_debug_log *debug_log;
1782 #endif
1783 
1784 	/** @gw: gateway data */
1785 	struct batadv_priv_gw gw;
1786 
1787 	/** @tt: translation table data */
1788 	struct batadv_priv_tt tt;
1789 
1790 	/** @tvlv: type-version-length-value data */
1791 	struct batadv_priv_tvlv tvlv;
1792 
1793 #ifdef CONFIG_BATMAN_ADV_DAT
1794 	/** @dat: distributed arp table data */
1795 	struct batadv_priv_dat dat;
1796 #endif
1797 
1798 #ifdef CONFIG_BATMAN_ADV_MCAST
1799 	/** @mcast: multicast data */
1800 	struct batadv_priv_mcast mcast;
1801 #endif
1802 
1803 #ifdef CONFIG_BATMAN_ADV_NC
1804 	/**
1805 	 * @network_coding: bool indicating whether network coding is enabled
1806 	 */
1807 	atomic_t network_coding;
1808 
1809 	/** @nc: network coding data */
1810 	struct batadv_priv_nc nc;
1811 #endif /* CONFIG_BATMAN_ADV_NC */
1812 
1813 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
1814 	/** @bat_v: B.A.T.M.A.N. V per soft-interface private data */
1815 	struct batadv_priv_bat_v bat_v;
1816 #endif
1817 };
1818 
1819 #ifdef CONFIG_BATMAN_ADV_BLA
1820 
1821 /**
1822  * struct batadv_bla_backbone_gw - batman-adv gateway bridged into the LAN
1823  */
1824 struct batadv_bla_backbone_gw {
1825 	/**
1826 	 * @orig: originator address of backbone node (mac address of primary
1827 	 *  iface)
1828 	 */
1829 	u8 orig[ETH_ALEN];
1830 
1831 	/** @vid: vlan id this gateway was detected on */
1832 	unsigned short vid;
1833 
1834 	/** @hash_entry: hlist node for &batadv_priv_bla.backbone_hash */
1835 	struct hlist_node hash_entry;
1836 
1837 	/** @bat_priv: pointer to soft_iface this backbone gateway belongs to */
1838 	struct batadv_priv *bat_priv;
1839 
1840 	/** @lasttime: last time we heard of this backbone gw */
1841 	unsigned long lasttime;
1842 
1843 	/**
1844 	 * @wait_periods: grace time for bridge forward delays and bla group
1845 	 *  forming at bootup phase - no bcast traffic is formwared until it has
1846 	 *  elapsed
1847 	 */
1848 	atomic_t wait_periods;
1849 
1850 	/**
1851 	 * @request_sent: if this bool is set to true we are out of sync with
1852 	 *  this backbone gateway - no bcast traffic is formwared until the
1853 	 *  situation was resolved
1854 	 */
1855 	atomic_t request_sent;
1856 
1857 	/** @crc: crc16 checksum over all claims */
1858 	u16 crc;
1859 
1860 	/** @crc_lock: lock protecting crc */
1861 	spinlock_t crc_lock;
1862 
1863 	/** @report_work: work struct for reporting detected loops */
1864 	struct work_struct report_work;
1865 
1866 	/** @refcount: number of contexts the object is used */
1867 	struct kref refcount;
1868 
1869 	/** @rcu: struct used for freeing in an RCU-safe manner */
1870 	struct rcu_head rcu;
1871 };
1872 
1873 /**
1874  * struct batadv_bla_claim - claimed non-mesh client structure
1875  */
1876 struct batadv_bla_claim {
1877 	/** @addr: mac address of claimed non-mesh client */
1878 	u8 addr[ETH_ALEN];
1879 
1880 	/** @vid: vlan id this client was detected on */
1881 	unsigned short vid;
1882 
1883 	/** @backbone_gw: pointer to backbone gw claiming this client */
1884 	struct batadv_bla_backbone_gw *backbone_gw;
1885 
1886 	/** @backbone_lock: lock protecting backbone_gw pointer */
1887 	spinlock_t backbone_lock;
1888 
1889 	/** @lasttime: last time we heard of claim (locals only) */
1890 	unsigned long lasttime;
1891 
1892 	/** @hash_entry: hlist node for &batadv_priv_bla.claim_hash */
1893 	struct hlist_node hash_entry;
1894 
1895 	/** @refcount: number of contexts the object is used */
1896 	struct rcu_head rcu;
1897 
1898 	/** @rcu: struct used for freeing in an RCU-safe manner */
1899 	struct kref refcount;
1900 };
1901 #endif
1902 
1903 /**
1904  * struct batadv_tt_common_entry - tt local & tt global common data
1905  */
1906 struct batadv_tt_common_entry {
1907 	/** @addr: mac address of non-mesh client */
1908 	u8 addr[ETH_ALEN];
1909 
1910 	/** @vid: VLAN identifier */
1911 	unsigned short vid;
1912 
1913 	/**
1914 	 * @hash_entry: hlist node for &batadv_priv_tt.local_hash or for
1915 	 *  &batadv_priv_tt.global_hash
1916 	 */
1917 	struct hlist_node hash_entry;
1918 
1919 	/** @flags: various state handling flags (see batadv_tt_client_flags) */
1920 	u16 flags;
1921 
1922 	/** @added_at: timestamp used for purging stale tt common entries */
1923 	unsigned long added_at;
1924 
1925 	/** @refcount: number of contexts the object is used */
1926 	struct kref refcount;
1927 
1928 	/** @rcu: struct used for freeing in an RCU-safe manner */
1929 	struct rcu_head rcu;
1930 };
1931 
1932 /**
1933  * struct batadv_tt_local_entry - translation table local entry data
1934  */
1935 struct batadv_tt_local_entry {
1936 	/** @common: general translation table data */
1937 	struct batadv_tt_common_entry common;
1938 
1939 	/** @last_seen: timestamp used for purging stale tt local entries */
1940 	unsigned long last_seen;
1941 
1942 	/** @vlan: soft-interface vlan of the entry */
1943 	struct batadv_softif_vlan *vlan;
1944 };
1945 
1946 /**
1947  * struct batadv_tt_global_entry - translation table global entry data
1948  */
1949 struct batadv_tt_global_entry {
1950 	/** @common: general translation table data */
1951 	struct batadv_tt_common_entry common;
1952 
1953 	/** @orig_list: list of orig nodes announcing this non-mesh client */
1954 	struct hlist_head orig_list;
1955 
1956 	/** @orig_list_count: number of items in the orig_list */
1957 	atomic_t orig_list_count;
1958 
1959 	/** @list_lock: lock protecting orig_list */
1960 	spinlock_t list_lock;
1961 
1962 	/** @roam_at: time at which TT_GLOBAL_ROAM was set */
1963 	unsigned long roam_at;
1964 };
1965 
1966 /**
1967  * struct batadv_tt_orig_list_entry - orig node announcing a non-mesh client
1968  */
1969 struct batadv_tt_orig_list_entry {
1970 	/** @orig_node: pointer to orig node announcing this non-mesh client */
1971 	struct batadv_orig_node *orig_node;
1972 
1973 	/**
1974 	 * @ttvn: translation table version number which added the non-mesh
1975 	 *  client
1976 	 */
1977 	u8 ttvn;
1978 
1979 	/** @flags: per orig entry TT sync flags */
1980 	u8 flags;
1981 
1982 	/** @list: list node for &batadv_tt_global_entry.orig_list */
1983 	struct hlist_node list;
1984 
1985 	/** @refcount: number of contexts the object is used */
1986 	struct kref refcount;
1987 
1988 	/** @rcu: struct used for freeing in an RCU-safe manner */
1989 	struct rcu_head rcu;
1990 };
1991 
1992 /**
1993  * struct batadv_tt_change_node - structure for tt changes occurred
1994  */
1995 struct batadv_tt_change_node {
1996 	/** @list: list node for &batadv_priv_tt.changes_list */
1997 	struct list_head list;
1998 
1999 	/** @change: holds the actual translation table diff data */
2000 	struct batadv_tvlv_tt_change change;
2001 };
2002 
2003 /**
2004  * struct batadv_tt_req_node - data to keep track of the tt requests in flight
2005  */
2006 struct batadv_tt_req_node {
2007 	/**
2008 	 * @addr: mac address of the originator this request was sent to
2009 	 */
2010 	u8 addr[ETH_ALEN];
2011 
2012 	/** @issued_at: timestamp used for purging stale tt requests */
2013 	unsigned long issued_at;
2014 
2015 	/** @refcount: number of contexts the object is used by */
2016 	struct kref refcount;
2017 
2018 	/** @list: list node for &batadv_priv_tt.req_list */
2019 	struct hlist_node list;
2020 };
2021 
2022 /**
2023  * struct batadv_tt_roam_node - roaming client data
2024  */
2025 struct batadv_tt_roam_node {
2026 	/** @addr: mac address of the client in the roaming phase */
2027 	u8 addr[ETH_ALEN];
2028 
2029 	/**
2030 	 * @counter: number of allowed roaming events per client within a single
2031 	 * OGM interval (changes are committed with each OGM)
2032 	 */
2033 	atomic_t counter;
2034 
2035 	/**
2036 	 * @first_time: timestamp used for purging stale roaming node entries
2037 	 */
2038 	unsigned long first_time;
2039 
2040 	/** @list: list node for &batadv_priv_tt.roam_list */
2041 	struct list_head list;
2042 };
2043 
2044 /**
2045  * struct batadv_nc_node - network coding node
2046  */
2047 struct batadv_nc_node {
2048 	/** @list: next and prev pointer for the list handling */
2049 	struct list_head list;
2050 
2051 	/** @addr: the node's mac address */
2052 	u8 addr[ETH_ALEN];
2053 
2054 	/** @refcount: number of contexts the object is used by */
2055 	struct kref refcount;
2056 
2057 	/** @rcu: struct used for freeing in an RCU-safe manner */
2058 	struct rcu_head rcu;
2059 
2060 	/** @orig_node: pointer to corresponding orig node struct */
2061 	struct batadv_orig_node *orig_node;
2062 
2063 	/** @last_seen: timestamp of last ogm received from this node */
2064 	unsigned long last_seen;
2065 };
2066 
2067 /**
2068  * struct batadv_nc_path - network coding path
2069  */
2070 struct batadv_nc_path {
2071 	/** @hash_entry: next and prev pointer for the list handling */
2072 	struct hlist_node hash_entry;
2073 
2074 	/** @rcu: struct used for freeing in an RCU-safe manner */
2075 	struct rcu_head rcu;
2076 
2077 	/** @refcount: number of contexts the object is used by */
2078 	struct kref refcount;
2079 
2080 	/** @packet_list: list of buffered packets for this path */
2081 	struct list_head packet_list;
2082 
2083 	/** @packet_list_lock: access lock for packet list */
2084 	spinlock_t packet_list_lock;
2085 
2086 	/** @next_hop: next hop (destination) of path */
2087 	u8 next_hop[ETH_ALEN];
2088 
2089 	/** @prev_hop: previous hop (source) of path */
2090 	u8 prev_hop[ETH_ALEN];
2091 
2092 	/** @last_valid: timestamp for last validation of path */
2093 	unsigned long last_valid;
2094 };
2095 
2096 /**
2097  * struct batadv_nc_packet - network coding packet used when coding and
2098  *  decoding packets
2099  */
2100 struct batadv_nc_packet {
2101 	/** @list: next and prev pointer for the list handling */
2102 	struct list_head list;
2103 
2104 	/** @packet_id: crc32 checksum of skb data */
2105 	__be32 packet_id;
2106 
2107 	/**
2108 	 * @timestamp: field containing the info when the packet was added to
2109 	 *  path
2110 	 */
2111 	unsigned long timestamp;
2112 
2113 	/** @neigh_node: pointer to original next hop neighbor of skb */
2114 	struct batadv_neigh_node *neigh_node;
2115 
2116 	/** @skb: skb which can be encoded or used for decoding */
2117 	struct sk_buff *skb;
2118 
2119 	/** @nc_path: pointer to path this nc packet is attached to */
2120 	struct batadv_nc_path *nc_path;
2121 };
2122 
2123 /**
2124  * struct batadv_skb_cb - control buffer structure used to store private data
2125  *  relevant to batman-adv in the skb->cb buffer in skbs.
2126  */
2127 struct batadv_skb_cb {
2128 	/**
2129 	 * @decoded: Marks a skb as decoded, which is checked when searching for
2130 	 *  coding opportunities in network-coding.c
2131 	 */
2132 	unsigned char decoded:1;
2133 
2134 	/** @num_bcasts: Counter for broadcast packet retransmissions */
2135 	unsigned char num_bcasts;
2136 };
2137 
2138 /**
2139  * struct batadv_forw_packet - structure for bcast packets to be sent/forwarded
2140  */
2141 struct batadv_forw_packet {
2142 	/**
2143 	 * @list: list node for &batadv_priv.forw.bcast_list and
2144 	 *  &batadv_priv.forw.bat_list
2145 	 */
2146 	struct hlist_node list;
2147 
2148 	/** @cleanup_list: list node for purging functions */
2149 	struct hlist_node cleanup_list;
2150 
2151 	/** @send_time: execution time for delayed_work (packet sending) */
2152 	unsigned long send_time;
2153 
2154 	/**
2155 	 * @own: bool for locally generated packets (local OGMs are re-scheduled
2156 	 * after sending)
2157 	 */
2158 	u8 own;
2159 
2160 	/** @skb: bcast packet's skb buffer */
2161 	struct sk_buff *skb;
2162 
2163 	/** @packet_len: size of aggregated OGM packet inside the skb buffer */
2164 	u16 packet_len;
2165 
2166 	/** @direct_link_flags: direct link flags for aggregated OGM packets */
2167 	u32 direct_link_flags;
2168 
2169 	/** @num_packets: counter for aggregated OGMv1 packets */
2170 	u8 num_packets;
2171 
2172 	/** @delayed_work: work queue callback item for packet sending */
2173 	struct delayed_work delayed_work;
2174 
2175 	/**
2176 	 * @if_incoming: pointer to incoming hard-iface or primary iface if
2177 	 *  locally generated packet
2178 	 */
2179 	struct batadv_hard_iface *if_incoming;
2180 
2181 	/**
2182 	 * @if_outgoing: packet where the packet should be sent to, or NULL if
2183 	 *  unspecified
2184 	 */
2185 	struct batadv_hard_iface *if_outgoing;
2186 
2187 	/** @queue_left: The queue (counter) this packet was applied to */
2188 	atomic_t *queue_left;
2189 };
2190 
2191 /**
2192  * struct batadv_algo_iface_ops - mesh algorithm callbacks (interface specific)
2193  */
2194 struct batadv_algo_iface_ops {
2195 	/**
2196 	 * @activate: start routing mechanisms when hard-interface is brought up
2197 	 *  (optional)
2198 	 */
2199 	void (*activate)(struct batadv_hard_iface *hard_iface);
2200 
2201 	/** @enable: init routing info when hard-interface is enabled */
2202 	int (*enable)(struct batadv_hard_iface *hard_iface);
2203 
2204 	/** @enabled: notification when hard-interface was enabled (optional) */
2205 	void (*enabled)(struct batadv_hard_iface *hard_iface);
2206 
2207 	/** @disable: de-init routing info when hard-interface is disabled */
2208 	void (*disable)(struct batadv_hard_iface *hard_iface);
2209 
2210 	/**
2211 	 * @update_mac: (re-)init mac addresses of the protocol information
2212 	 *  belonging to this hard-interface
2213 	 */
2214 	void (*update_mac)(struct batadv_hard_iface *hard_iface);
2215 
2216 	/** @primary_set: called when primary interface is selected / changed */
2217 	void (*primary_set)(struct batadv_hard_iface *hard_iface);
2218 };
2219 
2220 /**
2221  * struct batadv_algo_neigh_ops - mesh algorithm callbacks (neighbour specific)
2222  */
2223 struct batadv_algo_neigh_ops {
2224 	/** @hardif_init: called on creation of single hop entry (optional) */
2225 	void (*hardif_init)(struct batadv_hardif_neigh_node *neigh);
2226 
2227 	/**
2228 	 * @cmp: compare the metrics of two neighbors for their respective
2229 	 *  outgoing interfaces
2230 	 */
2231 	int (*cmp)(struct batadv_neigh_node *neigh1,
2232 		   struct batadv_hard_iface *if_outgoing1,
2233 		   struct batadv_neigh_node *neigh2,
2234 		   struct batadv_hard_iface *if_outgoing2);
2235 
2236 	/**
2237 	 * @is_similar_or_better: check if neigh1 is equally similar or better
2238 	 *  than neigh2 for their respective outgoing interface from the metric
2239 	 *  prospective
2240 	 */
2241 	bool (*is_similar_or_better)(struct batadv_neigh_node *neigh1,
2242 				     struct batadv_hard_iface *if_outgoing1,
2243 				     struct batadv_neigh_node *neigh2,
2244 				     struct batadv_hard_iface *if_outgoing2);
2245 
2246 	/** @dump: dump neighbors to a netlink socket (optional) */
2247 	void (*dump)(struct sk_buff *msg, struct netlink_callback *cb,
2248 		     struct batadv_priv *priv,
2249 		     struct batadv_hard_iface *hard_iface);
2250 };
2251 
2252 /**
2253  * struct batadv_algo_orig_ops - mesh algorithm callbacks (originator specific)
2254  */
2255 struct batadv_algo_orig_ops {
2256 	/** @dump: dump originators to a netlink socket (optional) */
2257 	void (*dump)(struct sk_buff *msg, struct netlink_callback *cb,
2258 		     struct batadv_priv *priv,
2259 		     struct batadv_hard_iface *hard_iface);
2260 };
2261 
2262 /**
2263  * struct batadv_algo_gw_ops - mesh algorithm callbacks (GW specific)
2264  */
2265 struct batadv_algo_gw_ops {
2266 	/** @init_sel_class: initialize GW selection class (optional) */
2267 	void (*init_sel_class)(struct batadv_priv *bat_priv);
2268 
2269 	/**
2270 	 * @sel_class_max: maximum allowed GW selection class
2271 	 */
2272 	u32 sel_class_max;
2273 
2274 	/**
2275 	 * @get_best_gw_node: select the best GW from the list of available
2276 	 *  nodes (optional)
2277 	 */
2278 	struct batadv_gw_node *(*get_best_gw_node)
2279 		(struct batadv_priv *bat_priv);
2280 
2281 	/**
2282 	 * @is_eligible: check if a newly discovered GW is a potential candidate
2283 	 *  for the election as best GW (optional)
2284 	 */
2285 	bool (*is_eligible)(struct batadv_priv *bat_priv,
2286 			    struct batadv_orig_node *curr_gw_orig,
2287 			    struct batadv_orig_node *orig_node);
2288 
2289 	/** @dump: dump gateways to a netlink socket (optional) */
2290 	void (*dump)(struct sk_buff *msg, struct netlink_callback *cb,
2291 		     struct batadv_priv *priv);
2292 };
2293 
2294 /**
2295  * struct batadv_algo_ops - mesh algorithm callbacks
2296  */
2297 struct batadv_algo_ops {
2298 	/** @list: list node for the batadv_algo_list */
2299 	struct hlist_node list;
2300 
2301 	/** @name: name of the algorithm */
2302 	char *name;
2303 
2304 	/** @iface: callbacks related to interface handling */
2305 	struct batadv_algo_iface_ops iface;
2306 
2307 	/** @neigh: callbacks related to neighbors handling */
2308 	struct batadv_algo_neigh_ops neigh;
2309 
2310 	/** @orig: callbacks related to originators handling */
2311 	struct batadv_algo_orig_ops orig;
2312 
2313 	/** @gw: callbacks related to GW mode */
2314 	struct batadv_algo_gw_ops gw;
2315 };
2316 
2317 /**
2318  * struct batadv_dat_entry - it is a single entry of batman-adv ARP backend. It
2319  * is used to stored ARP entries needed for the global DAT cache
2320  */
2321 struct batadv_dat_entry {
2322 	/** @ip: the IPv4 corresponding to this DAT/ARP entry */
2323 	__be32 ip;
2324 
2325 	/** @mac_addr: the MAC address associated to the stored IPv4 */
2326 	u8 mac_addr[ETH_ALEN];
2327 
2328 	/** @vid: the vlan ID associated to this entry */
2329 	unsigned short vid;
2330 
2331 	/**
2332 	 * @last_update: time in jiffies when this entry was refreshed last time
2333 	 */
2334 	unsigned long last_update;
2335 
2336 	/** @hash_entry: hlist node for &batadv_priv_dat.hash */
2337 	struct hlist_node hash_entry;
2338 
2339 	/** @refcount: number of contexts the object is used */
2340 	struct kref refcount;
2341 
2342 	/** @rcu: struct used for freeing in an RCU-safe manner */
2343 	struct rcu_head rcu;
2344 };
2345 
2346 /**
2347  * struct batadv_hw_addr - a list entry for a MAC address
2348  */
2349 struct batadv_hw_addr {
2350 	/** @list: list node for the linking of entries */
2351 	struct hlist_node list;
2352 
2353 	/** @addr: the MAC address of this list entry */
2354 	unsigned char addr[ETH_ALEN];
2355 };
2356 
2357 /**
2358  * struct batadv_dat_candidate - candidate destination for DAT operations
2359  */
2360 struct batadv_dat_candidate {
2361 	/**
2362 	 * @type: the type of the selected candidate. It can one of the
2363 	 *  following:
2364 	 *	  - BATADV_DAT_CANDIDATE_NOT_FOUND
2365 	 *	  - BATADV_DAT_CANDIDATE_ORIG
2366 	 */
2367 	int type;
2368 
2369 	/**
2370 	 * @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to
2371 	 * the corresponding originator node structure
2372 	 */
2373 	struct batadv_orig_node *orig_node;
2374 };
2375 
2376 /**
2377  * struct batadv_tvlv_container - container for tvlv appended to OGMs
2378  */
2379 struct batadv_tvlv_container {
2380 	/** @list: hlist node for &batadv_priv_tvlv.container_list */
2381 	struct hlist_node list;
2382 
2383 	/** @tvlv_hdr: tvlv header information needed to construct the tvlv */
2384 	struct batadv_tvlv_hdr tvlv_hdr;
2385 
2386 	/** @refcount: number of contexts the object is used */
2387 	struct kref refcount;
2388 };
2389 
2390 /**
2391  * struct batadv_tvlv_handler - handler for specific tvlv type and version
2392  */
2393 struct batadv_tvlv_handler {
2394 	/** @list: hlist node for &batadv_priv_tvlv.handler_list */
2395 	struct hlist_node list;
2396 
2397 	/**
2398 	 * @ogm_handler: handler callback which is given the tvlv payload to
2399 	 *  process on incoming OGM packets
2400 	 */
2401 	void (*ogm_handler)(struct batadv_priv *bat_priv,
2402 			    struct batadv_orig_node *orig,
2403 			    u8 flags, void *tvlv_value, u16 tvlv_value_len);
2404 
2405 	/**
2406 	 * @unicast_handler: handler callback which is given the tvlv payload to
2407 	 *  process on incoming unicast tvlv packets
2408 	 */
2409 	int (*unicast_handler)(struct batadv_priv *bat_priv,
2410 			       u8 *src, u8 *dst,
2411 			       void *tvlv_value, u16 tvlv_value_len);
2412 
2413 	/**
2414 	 * @mcast_handler: handler callback which is given the tvlv payload to
2415 	 *  process on incoming mcast packet
2416 	 */
2417 	int (*mcast_handler)(struct batadv_priv *bat_priv, struct sk_buff *skb);
2418 
2419 	/** @type: tvlv type this handler feels responsible for */
2420 	u8 type;
2421 
2422 	/** @version: tvlv version this handler feels responsible for */
2423 	u8 version;
2424 
2425 	/** @flags: tvlv handler flags */
2426 	u8 flags;
2427 
2428 	/** @refcount: number of contexts the object is used */
2429 	struct kref refcount;
2430 
2431 	/** @rcu: struct used for freeing in an RCU-safe manner */
2432 	struct rcu_head rcu;
2433 };
2434 
2435 /**
2436  * enum batadv_tvlv_handler_flags - tvlv handler flags definitions
2437  */
2438 enum batadv_tvlv_handler_flags {
2439 	/**
2440 	 * @BATADV_TVLV_HANDLER_OGM_CIFNOTFND: tvlv ogm processing function
2441 	 *  will call this handler even if its type was not found (with no data)
2442 	 */
2443 	BATADV_TVLV_HANDLER_OGM_CIFNOTFND = BIT(1),
2444 
2445 	/**
2446 	 * @BATADV_TVLV_HANDLER_OGM_CALLED: interval tvlv handling flag - the
2447 	 *  API marks a handler as being called, so it won't be called if the
2448 	 *  BATADV_TVLV_HANDLER_OGM_CIFNOTFND flag was set
2449 	 */
2450 	BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2),
2451 };
2452 
2453 #endif /* _NET_BATMAN_ADV_TYPES_H_ */
2454