1 /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 #ifndef _NET_BATMAN_ADV_TYPES_H_
19 #define _NET_BATMAN_ADV_TYPES_H_
23 #include <linux/kernel.h>
25 #ifdef CONFIG_BATMAN_ADV_DAT
27 /* batadv_dat_addr_t is the type used for all DHT addresses. If it is changed,
28 * BATADV_DAT_ADDR_MAX is changed as well.
30 * *Please be careful: batadv_dat_addr_t must be UNSIGNED*
32 #define batadv_dat_addr_t uint16_t
34 #endif /* CONFIG_BATMAN_ADV_DAT */
37 * enum batadv_dhcp_recipient - dhcp destination
38 * @BATADV_DHCP_NO: packet is not a dhcp message
39 * @BATADV_DHCP_TO_SERVER: dhcp message is directed to a server
40 * @BATADV_DHCP_TO_CLIENT: dhcp message is directed to a client
42 enum batadv_dhcp_recipient {
44 BATADV_DHCP_TO_SERVER,
45 BATADV_DHCP_TO_CLIENT,
49 * BATADV_TT_REMOTE_MASK - bitmask selecting the flags that are sent over the
52 #define BATADV_TT_REMOTE_MASK 0x00FF
55 * BATADV_TT_SYNC_MASK - bitmask of the flags that need to be kept in sync
56 * among the nodes. These flags are used to compute the global/local CRC
58 #define BATADV_TT_SYNC_MASK 0x00F0
61 * struct batadv_hard_iface_bat_iv - per hard interface B.A.T.M.A.N. IV data
62 * @ogm_buff: buffer holding the OGM packet
63 * @ogm_buff_len: length of the OGM packet buffer
64 * @ogm_seqno: OGM sequence number - used to identify each OGM
66 struct batadv_hard_iface_bat_iv {
67 unsigned char *ogm_buff;
73 * struct batadv_hard_iface - network device known to batman-adv
74 * @list: list node for batadv_hardif_list
75 * @if_num: identificator of the interface
76 * @if_status: status of the interface for batman-adv
77 * @net_dev: pointer to the net_device
78 * @num_bcasts: number of payload re-broadcasts on this interface (ARQ)
79 * @hardif_obj: kobject of the per interface sysfs "mesh" directory
80 * @refcount: number of contexts the object is used
81 * @batman_adv_ptype: packet type describing packets that should be processed by
82 * batman-adv for this interface
83 * @soft_iface: the batman-adv interface which uses this network interface
84 * @rcu: struct used for freeing in an RCU-safe manner
85 * @bat_iv: BATMAN IV specific per hard interface data
86 * @cleanup_work: work queue callback item for hard interface deinit
88 struct batadv_hard_iface {
89 struct list_head list;
92 struct net_device *net_dev;
94 struct kobject *hardif_obj;
96 struct packet_type batman_adv_ptype;
97 struct net_device *soft_iface;
99 struct batadv_hard_iface_bat_iv bat_iv;
100 struct work_struct cleanup_work;
104 * struct batadv_orig_ifinfo - originator info per outgoing interface
105 * @list: list node for orig_node::ifinfo_list
106 * @if_outgoing: pointer to outgoing hard interface
107 * @router: router that should be used to reach this originator
108 * @last_real_seqno: last and best known sequence number
109 * @last_ttl: ttl of last received packet
110 * @batman_seqno_reset: time when the batman seqno window was reset
111 * @refcount: number of contexts the object is used
112 * @rcu: struct used for freeing in an RCU-safe manner
114 struct batadv_orig_ifinfo {
115 struct hlist_node list;
116 struct batadv_hard_iface *if_outgoing;
117 struct batadv_neigh_node __rcu *router; /* rcu protected pointer */
118 uint32_t last_real_seqno;
120 unsigned long batman_seqno_reset;
126 * struct batadv_frag_table_entry - head in the fragment buffer table
127 * @head: head of list with fragments
128 * @lock: lock to protect the list of fragments
129 * @timestamp: time (jiffie) of last received fragment
130 * @seqno: sequence number of the fragments in the list
131 * @size: accumulated size of packets in list
133 struct batadv_frag_table_entry {
134 struct hlist_head head;
135 spinlock_t lock; /* protects head */
136 unsigned long timestamp;
142 * struct batadv_frag_list_entry - entry in a list of fragments
143 * @list: list node information
145 * @no: fragment number in the set
147 struct batadv_frag_list_entry {
148 struct hlist_node list;
154 * struct batadv_vlan_tt - VLAN specific TT attributes
155 * @crc: CRC32 checksum of the entries belonging to this vlan
156 * @num_entries: number of TT entries for this VLAN
158 struct batadv_vlan_tt {
160 atomic_t num_entries;
164 * batadv_orig_node_vlan - VLAN specific data per orig_node
165 * @vid: the VLAN identifier
166 * @tt: VLAN specific TT attributes
167 * @list: list node for orig_node::vlan_list
168 * @refcount: number of context where this object is currently in use
169 * @rcu: struct used for freeing in a RCU-safe manner
171 struct batadv_orig_node_vlan {
173 struct batadv_vlan_tt tt;
174 struct list_head list;
180 * struct batadv_orig_bat_iv - B.A.T.M.A.N. IV private orig_node members
181 * @bcast_own: bitfield containing the number of our OGMs this orig_node
182 * rebroadcasted "back" to us (relative to last_real_seqno)
183 * @bcast_own_sum: counted result of bcast_own
184 * @ogm_cnt_lock: lock protecting bcast_own, bcast_own_sum,
185 * neigh_node->bat_iv.real_bits & neigh_node->bat_iv.real_packet_count
187 struct batadv_orig_bat_iv {
188 unsigned long *bcast_own;
189 uint8_t *bcast_own_sum;
190 /* ogm_cnt_lock protects: bcast_own, bcast_own_sum,
191 * neigh_node->bat_iv.real_bits & neigh_node->bat_iv.real_packet_count
193 spinlock_t ogm_cnt_lock;
197 * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh
198 * @orig: originator ethernet address
199 * @primary_addr: hosts primary interface address
200 * @ifinfo_list: list for routers per outgoing interface
201 * @batadv_dat_addr_t: address of the orig node in the distributed hash
202 * @last_seen: time when last packet from this node was received
203 * @bcast_seqno_reset: time when the broadcast seqno window was reset
204 * @capabilities: announced capabilities of this originator
205 * @last_ttvn: last seen translation table version number
206 * @tt_buff: last tt changeset this node received from the orig node
207 * @tt_buff_len: length of the last tt changeset this node received from the
209 * @tt_buff_lock: lock that protects tt_buff and tt_buff_len
210 * @tt_initialised: bool keeping track of whether or not this node have received
211 * any translation table information from the orig node yet
212 * @tt_lock: prevents from updating the table while reading it. Table update is
213 * made up by two operations (data structure update and metdata -CRC/TTVN-
214 * recalculation) and they have to be executed atomically in order to avoid
215 * another thread to read the table/metadata between those.
216 * @bcast_bits: bitfield containing the info which payload broadcast originated
217 * from this orig node this host already has seen (relative to
219 * @last_bcast_seqno: last broadcast sequence number received by this host
220 * @neigh_list: list of potential next hop neighbor towards this orig node
221 * @neigh_list_lock: lock protecting neigh_list and router
222 * @hash_entry: hlist node for batadv_priv::orig_hash
223 * @bat_priv: pointer to soft_iface this orig node belongs to
224 * @bcast_seqno_lock: lock protecting bcast_bits & last_bcast_seqno
225 * @refcount: number of contexts the object is used
226 * @rcu: struct used for freeing in an RCU-safe manner
227 * @in_coding_list: list of nodes this orig can hear
228 * @out_coding_list: list of nodes that can hear this orig
229 * @in_coding_list_lock: protects in_coding_list
230 * @out_coding_list_lock: protects out_coding_list
231 * @fragments: array with heads for fragment chains
232 * @vlan_list: a list of orig_node_vlan structs, one per VLAN served by the
233 * originator represented by this object
234 * @vlan_list_lock: lock protecting vlan_list
235 * @bat_iv: B.A.T.M.A.N. IV private structure
237 struct batadv_orig_node {
238 uint8_t orig[ETH_ALEN];
239 uint8_t primary_addr[ETH_ALEN];
240 struct hlist_head ifinfo_list;
241 #ifdef CONFIG_BATMAN_ADV_DAT
242 batadv_dat_addr_t dat_addr;
244 unsigned long last_seen;
245 unsigned long bcast_seqno_reset;
246 uint8_t capabilities;
248 unsigned char *tt_buff;
250 spinlock_t tt_buff_lock; /* protects tt_buff & tt_buff_len */
252 /* prevents from changing the table while reading it */
254 DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
255 uint32_t last_bcast_seqno;
256 struct hlist_head neigh_list;
257 /* neigh_list_lock protects: neigh_list and router */
258 spinlock_t neigh_list_lock;
259 struct hlist_node hash_entry;
260 struct batadv_priv *bat_priv;
261 /* bcast_seqno_lock protects: bcast_bits & last_bcast_seqno */
262 spinlock_t bcast_seqno_lock;
265 #ifdef CONFIG_BATMAN_ADV_NC
266 struct list_head in_coding_list;
267 struct list_head out_coding_list;
268 spinlock_t in_coding_list_lock; /* Protects in_coding_list */
269 spinlock_t out_coding_list_lock; /* Protects out_coding_list */
271 struct batadv_frag_table_entry fragments[BATADV_FRAG_BUFFER_COUNT];
272 struct list_head vlan_list;
273 spinlock_t vlan_list_lock; /* protects vlan_list */
274 struct batadv_orig_bat_iv bat_iv;
278 * enum batadv_orig_capabilities - orig node capabilities
279 * @BATADV_ORIG_CAPA_HAS_DAT: orig node has distributed arp table enabled
280 * @BATADV_ORIG_CAPA_HAS_NC: orig node has network coding enabled
282 enum batadv_orig_capabilities {
283 BATADV_ORIG_CAPA_HAS_DAT = BIT(0),
284 BATADV_ORIG_CAPA_HAS_NC = BIT(1),
288 * struct batadv_gw_node - structure for orig nodes announcing gw capabilities
289 * @list: list node for batadv_priv_gw::list
290 * @orig_node: pointer to corresponding orig node
291 * @bandwidth_down: advertised uplink download bandwidth
292 * @bandwidth_up: advertised uplink upload bandwidth
293 * @deleted: this struct is scheduled for deletion
294 * @refcount: number of contexts the object is used
295 * @rcu: struct used for freeing in an RCU-safe manner
297 struct batadv_gw_node {
298 struct hlist_node list;
299 struct batadv_orig_node *orig_node;
300 uint32_t bandwidth_down;
301 uint32_t bandwidth_up;
302 unsigned long deleted;
308 * struct batadv_neigh_node - structure for single hops neighbors
309 * @list: list node for batadv_orig_node::neigh_list
310 * @orig_node: pointer to corresponding orig_node
311 * @addr: the MAC address of the neighboring interface
312 * @ifinfo_list: list for routing metrics per outgoing interface
313 * @ifinfo_lock: lock protecting private ifinfo members and list
314 * @if_incoming: pointer to incoming hard interface
315 * @last_seen: when last packet via this neighbor was received
316 * @last_ttl: last received ttl from this neigh node
317 * @rcu: struct used for freeing in an RCU-safe manner
318 * @bat_iv: B.A.T.M.A.N. IV private structure
320 struct batadv_neigh_node {
321 struct hlist_node list;
322 struct batadv_orig_node *orig_node;
323 uint8_t addr[ETH_ALEN];
324 struct hlist_head ifinfo_list;
325 spinlock_t ifinfo_lock; /* protects ifinfo_list and its members */
326 struct batadv_hard_iface *if_incoming;
327 unsigned long last_seen;
332 /* struct batadv_neigh_node_bat_iv - neighbor information per outgoing
333 * interface for BATMAN IV
334 * @tq_recv: ring buffer of received TQ values from this neigh node
335 * @tq_index: ring buffer index
336 * @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv)
337 * @real_bits: bitfield containing the number of OGMs received from this neigh
338 * node (relative to orig_node->last_real_seqno)
339 * @real_packet_count: counted result of real_bits
341 struct batadv_neigh_ifinfo_bat_iv {
342 uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
345 DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
346 uint8_t real_packet_count;
349 /* struct batadv_neigh_ifinfo - neighbor information per outgoing interface
350 * @list: list node for batadv_neigh_node::ifinfo_list
351 * @if_outgoing: pointer to outgoing hard interface
352 * @bat_iv: B.A.T.M.A.N. IV private structure
353 * @last_ttl: last received ttl from this neigh node
354 * @refcount: number of contexts the object is used
355 * @rcu: struct used for freeing in a RCU-safe manner
357 struct batadv_neigh_ifinfo {
358 struct hlist_node list;
359 struct batadv_hard_iface *if_outgoing;
360 struct batadv_neigh_ifinfo_bat_iv bat_iv;
367 * struct batadv_bcast_duplist_entry - structure for LAN broadcast suppression
368 * @orig[ETH_ALEN]: mac address of orig node orginating the broadcast
369 * @crc: crc32 checksum of broadcast payload
370 * @entrytime: time when the broadcast packet was received
372 #ifdef CONFIG_BATMAN_ADV_BLA
373 struct batadv_bcast_duplist_entry {
374 uint8_t orig[ETH_ALEN];
376 unsigned long entrytime;
381 * enum batadv_counters - indices for traffic counters
382 * @BATADV_CNT_TX: transmitted payload traffic packet counter
383 * @BATADV_CNT_TX_BYTES: transmitted payload traffic bytes counter
384 * @BATADV_CNT_TX_DROPPED: dropped transmission payload traffic packet counter
385 * @BATADV_CNT_RX: received payload traffic packet counter
386 * @BATADV_CNT_RX_BYTES: received payload traffic bytes counter
387 * @BATADV_CNT_FORWARD: forwarded payload traffic packet counter
388 * @BATADV_CNT_FORWARD_BYTES: forwarded payload traffic bytes counter
389 * @BATADV_CNT_MGMT_TX: transmitted routing protocol traffic packet counter
390 * @BATADV_CNT_MGMT_TX_BYTES: transmitted routing protocol traffic bytes counter
391 * @BATADV_CNT_MGMT_RX: received routing protocol traffic packet counter
392 * @BATADV_CNT_MGMT_RX_BYTES: received routing protocol traffic bytes counter
393 * @BATADV_CNT_FRAG_TX: transmitted fragment traffic packet counter
394 * @BATADV_CNT_FRAG_TX_BYTES: transmitted fragment traffic bytes counter
395 * @BATADV_CNT_FRAG_RX: received fragment traffic packet counter
396 * @BATADV_CNT_FRAG_RX_BYTES: received fragment traffic bytes counter
397 * @BATADV_CNT_FRAG_FWD: forwarded fragment traffic packet counter
398 * @BATADV_CNT_FRAG_FWD_BYTES: forwarded fragment traffic bytes counter
399 * @BATADV_CNT_TT_REQUEST_TX: transmitted tt req traffic packet counter
400 * @BATADV_CNT_TT_REQUEST_RX: received tt req traffic packet counter
401 * @BATADV_CNT_TT_RESPONSE_TX: transmitted tt resp traffic packet counter
402 * @BATADV_CNT_TT_RESPONSE_RX: received tt resp traffic packet counter
403 * @BATADV_CNT_TT_ROAM_ADV_TX: transmitted tt roam traffic packet counter
404 * @BATADV_CNT_TT_ROAM_ADV_RX: received tt roam traffic packet counter
405 * @BATADV_CNT_DAT_GET_TX: transmitted dht GET traffic packet counter
406 * @BATADV_CNT_DAT_GET_RX: received dht GET traffic packet counter
407 * @BATADV_CNT_DAT_PUT_TX: transmitted dht PUT traffic packet counter
408 * @BATADV_CNT_DAT_PUT_RX: received dht PUT traffic packet counter
409 * @BATADV_CNT_DAT_CACHED_REPLY_TX: transmitted dat cache reply traffic packet
411 * @BATADV_CNT_NC_CODE: transmitted nc-combined traffic packet counter
412 * @BATADV_CNT_NC_CODE_BYTES: transmitted nc-combined traffic bytes counter
413 * @BATADV_CNT_NC_RECODE: transmitted nc-recombined traffic packet counter
414 * @BATADV_CNT_NC_RECODE_BYTES: transmitted nc-recombined traffic bytes counter
415 * @BATADV_CNT_NC_BUFFER: counter for packets buffered for later nc decoding
416 * @BATADV_CNT_NC_DECODE: received and nc-decoded traffic packet counter
417 * @BATADV_CNT_NC_DECODE_BYTES: received and nc-decoded traffic bytes counter
418 * @BATADV_CNT_NC_DECODE_FAILED: received and decode-failed traffic packet
420 * @BATADV_CNT_NC_SNIFFED: counter for nc-decoded packets received in promisc
422 * @BATADV_CNT_NUM: number of traffic counters
424 enum batadv_counters {
427 BATADV_CNT_TX_DROPPED,
431 BATADV_CNT_FORWARD_BYTES,
433 BATADV_CNT_MGMT_TX_BYTES,
435 BATADV_CNT_MGMT_RX_BYTES,
437 BATADV_CNT_FRAG_TX_BYTES,
439 BATADV_CNT_FRAG_RX_BYTES,
441 BATADV_CNT_FRAG_FWD_BYTES,
442 BATADV_CNT_TT_REQUEST_TX,
443 BATADV_CNT_TT_REQUEST_RX,
444 BATADV_CNT_TT_RESPONSE_TX,
445 BATADV_CNT_TT_RESPONSE_RX,
446 BATADV_CNT_TT_ROAM_ADV_TX,
447 BATADV_CNT_TT_ROAM_ADV_RX,
448 #ifdef CONFIG_BATMAN_ADV_DAT
449 BATADV_CNT_DAT_GET_TX,
450 BATADV_CNT_DAT_GET_RX,
451 BATADV_CNT_DAT_PUT_TX,
452 BATADV_CNT_DAT_PUT_RX,
453 BATADV_CNT_DAT_CACHED_REPLY_TX,
455 #ifdef CONFIG_BATMAN_ADV_NC
457 BATADV_CNT_NC_CODE_BYTES,
458 BATADV_CNT_NC_RECODE,
459 BATADV_CNT_NC_RECODE_BYTES,
460 BATADV_CNT_NC_BUFFER,
461 BATADV_CNT_NC_DECODE,
462 BATADV_CNT_NC_DECODE_BYTES,
463 BATADV_CNT_NC_DECODE_FAILED,
464 BATADV_CNT_NC_SNIFFED,
470 * struct batadv_priv_tt - per mesh interface translation table data
471 * @vn: translation table version number
472 * @ogm_append_cnt: counter of number of OGMs containing the local tt diff
473 * @local_changes: changes registered in an originator interval
474 * @changes_list: tracks tt local changes within an originator interval
475 * @local_hash: local translation table hash table
476 * @global_hash: global translation table hash table
477 * @req_list: list of pending & unanswered tt_requests
478 * @roam_list: list of the last roaming events of each client limiting the
479 * number of roaming events to avoid route flapping
480 * @changes_list_lock: lock protecting changes_list
481 * @req_list_lock: lock protecting req_list
482 * @roam_list_lock: lock protecting roam_list
483 * @last_changeset: last tt changeset this host has generated
484 * @last_changeset_len: length of last tt changeset this host has generated
485 * @last_changeset_lock: lock protecting last_changeset & last_changeset_len
486 * @commit_lock: prevents from executing a local TT commit while reading the
487 * local table. The local TT commit is made up by two operations (data
488 * structure update and metdata -CRC/TTVN- recalculation) and they have to be
489 * executed atomically in order to avoid another thread to read the
490 * table/metadata between those.
491 * @work: work queue callback item for translation table purging
493 struct batadv_priv_tt {
495 atomic_t ogm_append_cnt;
496 atomic_t local_changes;
497 struct list_head changes_list;
498 struct batadv_hashtable *local_hash;
499 struct batadv_hashtable *global_hash;
500 struct list_head req_list;
501 struct list_head roam_list;
502 spinlock_t changes_list_lock; /* protects changes */
503 spinlock_t req_list_lock; /* protects req_list */
504 spinlock_t roam_list_lock; /* protects roam_list */
505 unsigned char *last_changeset;
506 int16_t last_changeset_len;
507 /* protects last_changeset & last_changeset_len */
508 spinlock_t last_changeset_lock;
509 /* prevents from executing a commit while reading the table */
510 spinlock_t commit_lock;
511 struct delayed_work work;
515 * struct batadv_priv_bla - per mesh interface bridge loope avoidance data
516 * @num_requests; number of bla requests in flight
517 * @claim_hash: hash table containing mesh nodes this host has claimed
518 * @backbone_hash: hash table containing all detected backbone gateways
519 * @bcast_duplist: recently received broadcast packets array (for broadcast
520 * duplicate suppression)
521 * @bcast_duplist_curr: index of last broadcast packet added to bcast_duplist
522 * @bcast_duplist_lock: lock protecting bcast_duplist & bcast_duplist_curr
523 * @claim_dest: local claim data (e.g. claim group)
524 * @work: work queue callback item for cleanups & bla announcements
526 #ifdef CONFIG_BATMAN_ADV_BLA
527 struct batadv_priv_bla {
528 atomic_t num_requests;
529 struct batadv_hashtable *claim_hash;
530 struct batadv_hashtable *backbone_hash;
531 struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE];
532 int bcast_duplist_curr;
533 /* protects bcast_duplist & bcast_duplist_curr */
534 spinlock_t bcast_duplist_lock;
535 struct batadv_bla_claim_dst claim_dest;
536 struct delayed_work work;
541 * struct batadv_debug_log - debug logging data
542 * @log_buff: buffer holding the logs (ring bufer)
543 * @log_start: index of next character to read
544 * @log_end: index of next character to write
545 * @lock: lock protecting log_buff, log_start & log_end
546 * @queue_wait: log reader's wait queue
548 #ifdef CONFIG_BATMAN_ADV_DEBUG
549 struct batadv_priv_debug_log {
550 char log_buff[BATADV_LOG_BUF_LEN];
551 unsigned long log_start;
552 unsigned long log_end;
553 spinlock_t lock; /* protects log_buff, log_start and log_end */
554 wait_queue_head_t queue_wait;
559 * struct batadv_priv_gw - per mesh interface gateway data
560 * @list: list of available gateway nodes
561 * @list_lock: lock protecting gw_list & curr_gw
562 * @curr_gw: pointer to currently selected gateway node
563 * @bandwidth_down: advertised uplink download bandwidth (if gw_mode server)
564 * @bandwidth_up: advertised uplink upload bandwidth (if gw_mode server)
565 * @reselect: bool indicating a gateway re-selection is in progress
567 struct batadv_priv_gw {
568 struct hlist_head list;
569 spinlock_t list_lock; /* protects gw_list & curr_gw */
570 struct batadv_gw_node __rcu *curr_gw; /* rcu protected pointer */
571 atomic_t bandwidth_down;
572 atomic_t bandwidth_up;
577 * struct batadv_priv_tvlv - per mesh interface tvlv data
578 * @container_list: list of registered tvlv containers to be sent with each OGM
579 * @handler_list: list of the various tvlv content handlers
580 * @container_list_lock: protects tvlv container list access
581 * @handler_list_lock: protects handler list access
583 struct batadv_priv_tvlv {
584 struct hlist_head container_list;
585 struct hlist_head handler_list;
586 spinlock_t container_list_lock; /* protects container_list */
587 spinlock_t handler_list_lock; /* protects handler_list */
591 * struct batadv_priv_dat - per mesh interface DAT private data
592 * @addr: node DAT address
593 * @hash: hashtable representing the local ARP cache
594 * @work: work queue callback item for cache purging
596 #ifdef CONFIG_BATMAN_ADV_DAT
597 struct batadv_priv_dat {
598 batadv_dat_addr_t addr;
599 struct batadv_hashtable *hash;
600 struct delayed_work work;
605 * struct batadv_priv_nc - per mesh interface network coding private data
606 * @work: work queue callback item for cleanup
607 * @debug_dir: dentry for nc subdir in batman-adv directory in debugfs
608 * @min_tq: only consider neighbors for encoding if neigh_tq > min_tq
609 * @max_fwd_delay: maximum packet forward delay to allow coding of packets
610 * @max_buffer_time: buffer time for sniffed packets used to decoding
611 * @timestamp_fwd_flush: timestamp of last forward packet queue flush
612 * @timestamp_sniffed_purge: timestamp of last sniffed packet queue purge
613 * @coding_hash: Hash table used to buffer skbs while waiting for another
614 * incoming skb to code it with. Skbs are added to the buffer just before being
615 * forwarded in routing.c
616 * @decoding_hash: Hash table used to buffer skbs that might be needed to decode
617 * a received coded skb. The buffer is used for 1) skbs arriving on the
618 * soft-interface; 2) skbs overheard on the hard-interface; and 3) skbs
619 * forwarded by batman-adv.
621 struct batadv_priv_nc {
622 struct delayed_work work;
623 struct dentry *debug_dir;
627 unsigned long timestamp_fwd_flush;
628 unsigned long timestamp_sniffed_purge;
629 struct batadv_hashtable *coding_hash;
630 struct batadv_hashtable *decoding_hash;
634 * struct batadv_softif_vlan - per VLAN attributes set
635 * @vid: VLAN identifier
636 * @kobj: kobject for sysfs vlan subdirectory
637 * @ap_isolation: AP isolation state
638 * @tt: TT private attributes (VLAN specific)
639 * @list: list node for bat_priv::softif_vlan_list
640 * @refcount: number of context where this object is currently in use
641 * @rcu: struct used for freeing in a RCU-safe manner
643 struct batadv_softif_vlan {
645 struct kobject *kobj;
646 atomic_t ap_isolation; /* boolean */
647 struct batadv_vlan_tt tt;
648 struct hlist_node list;
654 * struct batadv_priv - per mesh interface data
655 * @mesh_state: current status of the mesh (inactive/active/deactivating)
656 * @soft_iface: net device which holds this struct as private data
657 * @stats: structure holding the data for the ndo_get_stats() call
658 * @bat_counters: mesh internal traffic statistic counters (see batadv_counters)
659 * @aggregated_ogms: bool indicating whether OGM aggregation is enabled
660 * @bonding: bool indicating whether traffic bonding is enabled
661 * @fragmentation: bool indicating whether traffic fragmentation is enabled
662 * @packet_size_max: max packet size that can be transmitted via
663 * multiple fragmented skbs or a single frame if fragmentation is disabled
664 * @frag_seqno: incremental counter to identify chains of egress fragments
665 * @bridge_loop_avoidance: bool indicating whether bridge loop avoidance is
667 * @distributed_arp_table: bool indicating whether distributed ARP table is
669 * @gw_mode: gateway operation: off, client or server (see batadv_gw_modes)
670 * @gw_sel_class: gateway selection class (applies if gw_mode client)
671 * @orig_interval: OGM broadcast interval in milliseconds
672 * @hop_penalty: penalty which will be applied to an OGM's tq-field on every hop
673 * @log_level: configured log level (see batadv_dbg_level)
674 * @bcast_seqno: last sent broadcast packet sequence number
675 * @bcast_queue_left: number of remaining buffered broadcast packet slots
676 * @batman_queue_left: number of remaining OGM packet slots
677 * @num_ifaces: number of interfaces assigned to this mesh interface
678 * @mesh_obj: kobject for sysfs mesh subdirectory
679 * @debug_dir: dentry for debugfs batman-adv subdirectory
680 * @forw_bat_list: list of aggregated OGMs that will be forwarded
681 * @forw_bcast_list: list of broadcast packets that will be rebroadcasted
682 * @orig_hash: hash table containing mesh participants (orig nodes)
683 * @forw_bat_list_lock: lock protecting forw_bat_list
684 * @forw_bcast_list_lock: lock protecting forw_bcast_list
685 * @orig_work: work queue callback item for orig node purging
686 * @cleanup_work: work queue callback item for soft interface deinit
687 * @primary_if: one of the hard interfaces assigned to this mesh interface
688 * becomes the primary interface
689 * @bat_algo_ops: routing algorithm used by this mesh interface
690 * @softif_vlan_list: a list of softif_vlan structs, one per VLAN created on top
691 * of the mesh interface represented by this object
692 * @softif_vlan_list_lock: lock protecting softif_vlan_list
693 * @bla: bridge loope avoidance data
694 * @debug_log: holding debug logging relevant data
696 * @tt: translation table data
697 * @tvlv: type-version-length-value data
698 * @dat: distributed arp table data
699 * @network_coding: bool indicating whether network coding is enabled
700 * @batadv_priv_nc: network coding data
704 struct net_device *soft_iface;
705 struct net_device_stats stats;
706 uint64_t __percpu *bat_counters; /* Per cpu counters */
707 atomic_t aggregated_ogms;
709 atomic_t fragmentation;
710 atomic_t packet_size_max;
712 #ifdef CONFIG_BATMAN_ADV_BLA
713 atomic_t bridge_loop_avoidance;
715 #ifdef CONFIG_BATMAN_ADV_DAT
716 atomic_t distributed_arp_table;
719 atomic_t gw_sel_class;
720 atomic_t orig_interval;
721 atomic_t hop_penalty;
722 #ifdef CONFIG_BATMAN_ADV_DEBUG
725 uint32_t isolation_mark;
726 uint32_t isolation_mark_mask;
727 atomic_t bcast_seqno;
728 atomic_t bcast_queue_left;
729 atomic_t batman_queue_left;
731 struct kobject *mesh_obj;
732 struct dentry *debug_dir;
733 struct hlist_head forw_bat_list;
734 struct hlist_head forw_bcast_list;
735 struct batadv_hashtable *orig_hash;
736 spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
737 spinlock_t forw_bcast_list_lock; /* protects forw_bcast_list */
738 struct delayed_work orig_work;
739 struct work_struct cleanup_work;
740 struct batadv_hard_iface __rcu *primary_if; /* rcu protected pointer */
741 struct batadv_algo_ops *bat_algo_ops;
742 struct hlist_head softif_vlan_list;
743 spinlock_t softif_vlan_list_lock; /* protects softif_vlan_list */
744 #ifdef CONFIG_BATMAN_ADV_BLA
745 struct batadv_priv_bla bla;
747 #ifdef CONFIG_BATMAN_ADV_DEBUG
748 struct batadv_priv_debug_log *debug_log;
750 struct batadv_priv_gw gw;
751 struct batadv_priv_tt tt;
752 struct batadv_priv_tvlv tvlv;
753 #ifdef CONFIG_BATMAN_ADV_DAT
754 struct batadv_priv_dat dat;
756 #ifdef CONFIG_BATMAN_ADV_NC
757 atomic_t network_coding;
758 struct batadv_priv_nc nc;
759 #endif /* CONFIG_BATMAN_ADV_NC */
763 * struct batadv_socket_client - layer2 icmp socket client data
764 * @queue_list: packet queue for packets destined for this socket client
765 * @queue_len: number of packets in the packet queue (queue_list)
766 * @index: socket client's index in the batadv_socket_client_hash
767 * @lock: lock protecting queue_list, queue_len & index
768 * @queue_wait: socket client's wait queue
769 * @bat_priv: pointer to soft_iface this client belongs to
771 struct batadv_socket_client {
772 struct list_head queue_list;
773 unsigned int queue_len;
775 spinlock_t lock; /* protects queue_list, queue_len & index */
776 wait_queue_head_t queue_wait;
777 struct batadv_priv *bat_priv;
781 * struct batadv_socket_packet - layer2 icmp packet for socket client
782 * @list: list node for batadv_socket_client::queue_list
783 * @icmp_len: size of the layer2 icmp packet
784 * @icmp_packet: layer2 icmp packet
786 struct batadv_socket_packet {
787 struct list_head list;
789 uint8_t icmp_packet[BATADV_ICMP_MAX_PACKET_SIZE];
793 * struct batadv_bla_backbone_gw - batman-adv gateway bridged into the LAN
794 * @orig: originator address of backbone node (mac address of primary iface)
795 * @vid: vlan id this gateway was detected on
796 * @hash_entry: hlist node for batadv_priv_bla::backbone_hash
797 * @bat_priv: pointer to soft_iface this backbone gateway belongs to
798 * @lasttime: last time we heard of this backbone gw
799 * @wait_periods: grace time for bridge forward delays and bla group forming at
800 * bootup phase - no bcast traffic is formwared until it has elapsed
801 * @request_sent: if this bool is set to true we are out of sync with this
802 * backbone gateway - no bcast traffic is formwared until the situation was
804 * @crc: crc16 checksum over all claims
805 * @refcount: number of contexts the object is used
806 * @rcu: struct used for freeing in an RCU-safe manner
808 #ifdef CONFIG_BATMAN_ADV_BLA
809 struct batadv_bla_backbone_gw {
810 uint8_t orig[ETH_ALEN];
812 struct hlist_node hash_entry;
813 struct batadv_priv *bat_priv;
814 unsigned long lasttime;
815 atomic_t wait_periods;
816 atomic_t request_sent;
823 * struct batadv_bla_claim - claimed non-mesh client structure
824 * @addr: mac address of claimed non-mesh client
825 * @vid: vlan id this client was detected on
826 * @batadv_bla_backbone_gw: pointer to backbone gw claiming this client
827 * @lasttime: last time we heard of claim (locals only)
828 * @hash_entry: hlist node for batadv_priv_bla::claim_hash
829 * @refcount: number of contexts the object is used
830 * @rcu: struct used for freeing in an RCU-safe manner
832 struct batadv_bla_claim {
833 uint8_t addr[ETH_ALEN];
835 struct batadv_bla_backbone_gw *backbone_gw;
836 unsigned long lasttime;
837 struct hlist_node hash_entry;
844 * struct batadv_tt_common_entry - tt local & tt global common data
845 * @addr: mac address of non-mesh client
846 * @vid: VLAN identifier
847 * @hash_entry: hlist node for batadv_priv_tt::local_hash or for
848 * batadv_priv_tt::global_hash
849 * @flags: various state handling flags (see batadv_tt_client_flags)
850 * @added_at: timestamp used for purging stale tt common entries
851 * @refcount: number of contexts the object is used
852 * @rcu: struct used for freeing in an RCU-safe manner
854 struct batadv_tt_common_entry {
855 uint8_t addr[ETH_ALEN];
857 struct hlist_node hash_entry;
859 unsigned long added_at;
865 * struct batadv_tt_local_entry - translation table local entry data
866 * @common: general translation table data
867 * @last_seen: timestamp used for purging stale tt local entries
869 struct batadv_tt_local_entry {
870 struct batadv_tt_common_entry common;
871 unsigned long last_seen;
875 * struct batadv_tt_global_entry - translation table global entry data
876 * @common: general translation table data
877 * @orig_list: list of orig nodes announcing this non-mesh client
878 * @list_lock: lock protecting orig_list
879 * @roam_at: time at which TT_GLOBAL_ROAM was set
881 struct batadv_tt_global_entry {
882 struct batadv_tt_common_entry common;
883 struct hlist_head orig_list;
884 spinlock_t list_lock; /* protects orig_list */
885 unsigned long roam_at;
889 * struct batadv_tt_orig_list_entry - orig node announcing a non-mesh client
890 * @orig_node: pointer to orig node announcing this non-mesh client
891 * @ttvn: translation table version number which added the non-mesh client
892 * @list: list node for batadv_tt_global_entry::orig_list
893 * @refcount: number of contexts the object is used
894 * @rcu: struct used for freeing in an RCU-safe manner
896 struct batadv_tt_orig_list_entry {
897 struct batadv_orig_node *orig_node;
899 struct hlist_node list;
905 * struct batadv_tt_change_node - structure for tt changes occured
906 * @list: list node for batadv_priv_tt::changes_list
907 * @change: holds the actual translation table diff data
909 struct batadv_tt_change_node {
910 struct list_head list;
911 struct batadv_tvlv_tt_change change;
915 * struct batadv_tt_req_node - data to keep track of the tt requests in flight
916 * @addr: mac address address of the originator this request was sent to
917 * @issued_at: timestamp used for purging stale tt requests
918 * @list: list node for batadv_priv_tt::req_list
920 struct batadv_tt_req_node {
921 uint8_t addr[ETH_ALEN];
922 unsigned long issued_at;
923 struct list_head list;
927 * struct batadv_tt_roam_node - roaming client data
928 * @addr: mac address of the client in the roaming phase
929 * @counter: number of allowed roaming events per client within a single
930 * OGM interval (changes are committed with each OGM)
931 * @first_time: timestamp used for purging stale roaming node entries
932 * @list: list node for batadv_priv_tt::roam_list
934 struct batadv_tt_roam_node {
935 uint8_t addr[ETH_ALEN];
937 unsigned long first_time;
938 struct list_head list;
942 * struct batadv_nc_node - network coding node
943 * @list: next and prev pointer for the list handling
944 * @addr: the node's mac address
945 * @refcount: number of contexts the object is used by
946 * @rcu: struct used for freeing in an RCU-safe manner
947 * @orig_node: pointer to corresponding orig node struct
948 * @last_seen: timestamp of last ogm received from this node
950 struct batadv_nc_node {
951 struct list_head list;
952 uint8_t addr[ETH_ALEN];
955 struct batadv_orig_node *orig_node;
956 unsigned long last_seen;
960 * struct batadv_nc_path - network coding path
961 * @hash_entry: next and prev pointer for the list handling
962 * @rcu: struct used for freeing in an RCU-safe manner
963 * @refcount: number of contexts the object is used by
964 * @packet_list: list of buffered packets for this path
965 * @packet_list_lock: access lock for packet list
966 * @next_hop: next hop (destination) of path
967 * @prev_hop: previous hop (source) of path
968 * @last_valid: timestamp for last validation of path
970 struct batadv_nc_path {
971 struct hlist_node hash_entry;
974 struct list_head packet_list;
975 spinlock_t packet_list_lock; /* Protects packet_list */
976 uint8_t next_hop[ETH_ALEN];
977 uint8_t prev_hop[ETH_ALEN];
978 unsigned long last_valid;
982 * struct batadv_nc_packet - network coding packet used when coding and
984 * @list: next and prev pointer for the list handling
985 * @packet_id: crc32 checksum of skb data
986 * @timestamp: field containing the info when the packet was added to path
987 * @neigh_node: pointer to original next hop neighbor of skb
988 * @skb: skb which can be encoded or used for decoding
989 * @nc_path: pointer to path this nc packet is attached to
991 struct batadv_nc_packet {
992 struct list_head list;
994 unsigned long timestamp;
995 struct batadv_neigh_node *neigh_node;
997 struct batadv_nc_path *nc_path;
1001 * batadv_skb_cb - control buffer structure used to store private data relevant
1002 * to batman-adv in the skb->cb buffer in skbs.
1003 * @decoded: Marks a skb as decoded, which is checked when searching for coding
1004 * opportunities in network-coding.c
1006 struct batadv_skb_cb {
1011 * struct batadv_forw_packet - structure for bcast packets to be sent/forwarded
1012 * @list: list node for batadv_socket_client::queue_list
1013 * @send_time: execution time for delayed_work (packet sending)
1014 * @own: bool for locally generated packets (local OGMs are re-scheduled after
1016 * @skb: bcast packet's skb buffer
1017 * @packet_len: size of aggregated OGM packet inside the skb buffer
1018 * @direct_link_flags: direct link flags for aggregated OGM packets
1019 * @num_packets: counter for bcast packet retransmission
1020 * @delayed_work: work queue callback item for packet sending
1021 * @if_incoming: pointer incoming hard-iface or primary iface if locally
1024 struct batadv_forw_packet {
1025 struct hlist_node list;
1026 unsigned long send_time;
1028 struct sk_buff *skb;
1029 uint16_t packet_len;
1030 uint32_t direct_link_flags;
1031 uint8_t num_packets;
1032 struct delayed_work delayed_work;
1033 struct batadv_hard_iface *if_incoming;
1037 * struct batadv_algo_ops - mesh algorithm callbacks
1038 * @list: list node for the batadv_algo_list
1039 * @name: name of the algorithm
1040 * @bat_iface_enable: init routing info when hard-interface is enabled
1041 * @bat_iface_disable: de-init routing info when hard-interface is disabled
1042 * @bat_iface_update_mac: (re-)init mac addresses of the protocol information
1043 * belonging to this hard-interface
1044 * @bat_primary_iface_set: called when primary interface is selected / changed
1045 * @bat_ogm_schedule: prepare a new outgoing OGM for the send queue
1046 * @bat_ogm_emit: send scheduled OGM
1047 * @bat_neigh_cmp: compare the metrics of two neighbors for their respective
1048 * outgoing interfaces
1049 * @bat_neigh_is_equiv_or_better: check if neigh1 is equally good or better
1050 * than neigh2 for their respective outgoing interface from the metric
1052 * @bat_orig_print: print the originator table (optional)
1053 * @bat_orig_free: free the resources allocated by the routing algorithm for an
1055 * @bat_orig_add_if: ask the routing algorithm to apply the needed changes to
1056 * the orig_node due to a new hard-interface being added into the mesh
1057 * @bat_orig_del_if: ask the routing algorithm to apply the needed changes to
1058 * the orig_node due to an hard-interface being removed from the mesh
1060 struct batadv_algo_ops {
1061 struct hlist_node list;
1063 int (*bat_iface_enable)(struct batadv_hard_iface *hard_iface);
1064 void (*bat_iface_disable)(struct batadv_hard_iface *hard_iface);
1065 void (*bat_iface_update_mac)(struct batadv_hard_iface *hard_iface);
1066 void (*bat_primary_iface_set)(struct batadv_hard_iface *hard_iface);
1067 void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface);
1068 void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet);
1069 int (*bat_neigh_cmp)(struct batadv_neigh_node *neigh1,
1070 struct batadv_hard_iface *if_outgoing1,
1071 struct batadv_neigh_node *neigh2,
1072 struct batadv_hard_iface *if_outgoing2);
1073 bool (*bat_neigh_is_equiv_or_better)
1074 (struct batadv_neigh_node *neigh1,
1075 struct batadv_hard_iface *if_outgoing1,
1076 struct batadv_neigh_node *neigh2,
1077 struct batadv_hard_iface *if_outgoing2);
1078 /* orig_node handling API */
1079 void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq);
1080 void (*bat_orig_free)(struct batadv_orig_node *orig_node);
1081 int (*bat_orig_add_if)(struct batadv_orig_node *orig_node,
1083 int (*bat_orig_del_if)(struct batadv_orig_node *orig_node,
1084 int max_if_num, int del_if_num);
1088 * struct batadv_dat_entry - it is a single entry of batman-adv ARP backend. It
1089 * is used to stored ARP entries needed for the global DAT cache
1090 * @ip: the IPv4 corresponding to this DAT/ARP entry
1091 * @mac_addr: the MAC address associated to the stored IPv4
1092 * @vid: the vlan ID associated to this entry
1093 * @last_update: time in jiffies when this entry was refreshed last time
1094 * @hash_entry: hlist node for batadv_priv_dat::hash
1095 * @refcount: number of contexts the object is used
1096 * @rcu: struct used for freeing in an RCU-safe manner
1098 struct batadv_dat_entry {
1100 uint8_t mac_addr[ETH_ALEN];
1102 unsigned long last_update;
1103 struct hlist_node hash_entry;
1105 struct rcu_head rcu;
1109 * struct batadv_dat_candidate - candidate destination for DAT operations
1110 * @type: the type of the selected candidate. It can one of the following:
1111 * - BATADV_DAT_CANDIDATE_NOT_FOUND
1112 * - BATADV_DAT_CANDIDATE_ORIG
1113 * @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to the
1114 * corresponding originator node structure
1116 struct batadv_dat_candidate {
1118 struct batadv_orig_node *orig_node;
1122 * struct batadv_tvlv_container - container for tvlv appended to OGMs
1123 * @list: hlist node for batadv_priv_tvlv::container_list
1124 * @tvlv_hdr: tvlv header information needed to construct the tvlv
1125 * @value_len: length of the buffer following this struct which contains
1126 * the actual tvlv payload
1127 * @refcount: number of contexts the object is used
1129 struct batadv_tvlv_container {
1130 struct hlist_node list;
1131 struct batadv_tvlv_hdr tvlv_hdr;
1136 * struct batadv_tvlv_handler - handler for specific tvlv type and version
1137 * @list: hlist node for batadv_priv_tvlv::handler_list
1138 * @ogm_handler: handler callback which is given the tvlv payload to process on
1139 * incoming OGM packets
1140 * @unicast_handler: handler callback which is given the tvlv payload to process
1141 * on incoming unicast tvlv packets
1142 * @type: tvlv type this handler feels responsible for
1143 * @version: tvlv version this handler feels responsible for
1144 * @flags: tvlv handler flags
1145 * @refcount: number of contexts the object is used
1146 * @rcu: struct used for freeing in an RCU-safe manner
1148 struct batadv_tvlv_handler {
1149 struct hlist_node list;
1150 void (*ogm_handler)(struct batadv_priv *bat_priv,
1151 struct batadv_orig_node *orig,
1153 void *tvlv_value, uint16_t tvlv_value_len);
1154 int (*unicast_handler)(struct batadv_priv *bat_priv,
1155 uint8_t *src, uint8_t *dst,
1156 void *tvlv_value, uint16_t tvlv_value_len);
1161 struct rcu_head rcu;
1165 * enum batadv_tvlv_handler_flags - tvlv handler flags definitions
1166 * @BATADV_TVLV_HANDLER_OGM_CIFNOTFND: tvlv ogm processing function will call
1167 * this handler even if its type was not found (with no data)
1168 * @BATADV_TVLV_HANDLER_OGM_CALLED: interval tvlv handling flag - the API marks
1169 * a handler as being called, so it won't be called if the
1170 * BATADV_TVLV_HANDLER_OGM_CIFNOTFND flag was set
1172 enum batadv_tvlv_handler_flags {
1173 BATADV_TVLV_HANDLER_OGM_CIFNOTFND = BIT(1),
1174 BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2),
1177 #endif /* _NET_BATMAN_ADV_TYPES_H_ */