net/batman-adv/types.h

   1 /* Copyright (C) 2007-2015 B.A.T.M.A.N. contributors:
   2  *
   3  * Marek Lindner, Simon Wunderlich
   4  *
   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.
   8  *
   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.
  13  *
  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/>.
  16  */
  17
  18 #ifndef _NET_BATMAN_ADV_TYPES_H_
  19 #define _NET_BATMAN_ADV_TYPES_H_
  20
  21 #ifndef _NET_BATMAN_ADV_MAIN_H_
  22 #error only "main.h" can be included directly
  23 #endif
  24
  25 #include <linux/bitops.h>
  26 #include <linux/compiler.h>
  27 #include <linux/if_ether.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/sched.h> /* for linux/wait.h */
  30 #include <linux/spinlock.h>
  31 #include <linux/types.h>
  32 #include <linux/wait.h>
  33 #include <linux/workqueue.h>
  34
  35 #include "packet.h"
  36
  37 struct seq_file;
  38
  39 #ifdef CONFIG_BATMAN_ADV_DAT
  40
  41 /**
  42  * batadv_dat_addr_t - it is the type used for all DHT addresses. If it is
  43  *  changed, BATADV_DAT_ADDR_MAX is changed as well.
  44  *
  45  * *Please be careful: batadv_dat_addr_t must be UNSIGNED*
  46  */
  47 #define batadv_dat_addr_t u16
  48
  49 #endif /* CONFIG_BATMAN_ADV_DAT */
  50
  51 /**
  52  * enum batadv_dhcp_recipient - dhcp destination
  53  * @BATADV_DHCP_NO: packet is not a dhcp message
  54  * @BATADV_DHCP_TO_SERVER: dhcp message is directed to a server
  55  * @BATADV_DHCP_TO_CLIENT: dhcp message is directed to a client
  56  */
  57 enum batadv_dhcp_recipient {
  58         BATADV_DHCP_NO = 0,
  59         BATADV_DHCP_TO_SERVER,
  60         BATADV_DHCP_TO_CLIENT,
  61 };
  62
  63 /**
  64  * BATADV_TT_REMOTE_MASK - bitmask selecting the flags that are sent over the
  65  *  wire only
  66  */
  67 #define BATADV_TT_REMOTE_MASK   0x00FF
  68
  69 /**
  70  * BATADV_TT_SYNC_MASK - bitmask of the flags that need to be kept in sync
  71  *  among the nodes. These flags are used to compute the global/local CRC
  72  */
  73 #define BATADV_TT_SYNC_MASK     0x00F0
  74
  75 /**
  76  * struct batadv_hard_iface_bat_iv - per hard interface B.A.T.M.A.N. IV data
  77  * @ogm_buff: buffer holding the OGM packet
  78  * @ogm_buff_len: length of the OGM packet buffer
  79  * @ogm_seqno: OGM sequence number - used to identify each OGM
  80  */
  81 struct batadv_hard_iface_bat_iv {
  82         unsigned char *ogm_buff;
  83         int ogm_buff_len;
  84         atomic_t ogm_seqno;
  85 };
  86
  87 /**
  88  * struct batadv_hard_iface - network device known to batman-adv
  89  * @list: list node for batadv_hardif_list
  90  * @if_num: identificator of the interface
  91  * @if_status: status of the interface for batman-adv
  92  * @net_dev: pointer to the net_device
  93  * @num_bcasts: number of payload re-broadcasts on this interface (ARQ)
  94  * @hardif_obj: kobject of the per interface sysfs "mesh" directory
  95  * @refcount: number of contexts the object is used
  96  * @batman_adv_ptype: packet type describing packets that should be processed by
  97  *  batman-adv for this interface
  98  * @soft_iface: the batman-adv interface which uses this network interface
  99  * @rcu: struct used for freeing in an RCU-safe manner
 100  * @bat_iv: BATMAN IV specific per hard interface data
 101  * @cleanup_work: work queue callback item for hard interface deinit
 102  * @debug_dir: dentry for nc subdir in batman-adv directory in debugfs
 103  * @neigh_list: list of unique single hop neighbors via this interface
 104  * @neigh_list_lock: lock protecting neigh_list
 105  */
 106 struct batadv_hard_iface {
 107         struct list_head list;
 108         s16 if_num;
 109         char if_status;
 110         struct net_device *net_dev;
 111         u8 num_bcasts;
 112         struct kobject *hardif_obj;
 113         atomic_t refcount;
 114         struct packet_type batman_adv_ptype;
 115         struct net_device *soft_iface;
 116         struct rcu_head rcu;
 117         struct batadv_hard_iface_bat_iv bat_iv;
 118         struct work_struct cleanup_work;
 119         struct dentry *debug_dir;
 120         struct hlist_head neigh_list;
 121         /* neigh_list_lock protects: neigh_list */
 122         spinlock_t neigh_list_lock;
 123 };
 124
 125 /**
 126  * struct batadv_orig_ifinfo - originator info per outgoing interface
 127  * @list: list node for orig_node::ifinfo_list
 128  * @if_outgoing: pointer to outgoing hard interface
 129  * @router: router that should be used to reach this originator
 130  * @last_real_seqno: last and best known sequence number
 131  * @last_ttl: ttl of last received packet
 132  * @batman_seqno_reset: time when the batman seqno window was reset
 133  * @refcount: number of contexts the object is used
 134  * @rcu: struct used for freeing in an RCU-safe manner
 135  */
 136 struct batadv_orig_ifinfo {
 137         struct hlist_node list;
 138         struct batadv_hard_iface *if_outgoing;
 139         struct batadv_neigh_node __rcu *router; /* rcu protected pointer */
 140         u32 last_real_seqno;
 141         u8 last_ttl;
 142         unsigned long batman_seqno_reset;
 143         atomic_t refcount;
 144         struct rcu_head rcu;
 145 };
 146
 147 /**
 148  * struct batadv_frag_table_entry - head in the fragment buffer table
 149  * @head: head of list with fragments
 150  * @lock: lock to protect the list of fragments
 151  * @timestamp: time (jiffie) of last received fragment
 152  * @seqno: sequence number of the fragments in the list
 153  * @size: accumulated size of packets in list
 154  * @total_size: expected size of the assembled packet
 155  */
 156 struct batadv_frag_table_entry {
 157         struct hlist_head head;
 158         spinlock_t lock; /* protects head */
 159         unsigned long timestamp;
 160         u16 seqno;
 161         u16 size;
 162         u16 total_size;
 163 };
 164
 165 /**
 166  * struct batadv_frag_list_entry - entry in a list of fragments
 167  * @list: list node information
 168  * @skb: fragment
 169  * @no: fragment number in the set
 170  */
 171 struct batadv_frag_list_entry {
 172         struct hlist_node list;
 173         struct sk_buff *skb;
 174         u8 no;
 175 };
 176
 177 /**
 178  * struct batadv_vlan_tt - VLAN specific TT attributes
 179  * @crc: CRC32 checksum of the entries belonging to this vlan
 180  * @num_entries: number of TT entries for this VLAN
 181  */
 182 struct batadv_vlan_tt {
 183         u32 crc;
 184         atomic_t num_entries;
 185 };
 186
 187 /**
 188  * struct batadv_orig_node_vlan - VLAN specific data per orig_node
 189  * @vid: the VLAN identifier
 190  * @tt: VLAN specific TT attributes
 191  * @list: list node for orig_node::vlan_list
 192  * @refcount: number of context where this object is currently in use
 193  * @rcu: struct used for freeing in a RCU-safe manner
 194  */
 195 struct batadv_orig_node_vlan {
 196         unsigned short vid;
 197         struct batadv_vlan_tt tt;
 198         struct hlist_node list;
 199         atomic_t refcount;
 200         struct rcu_head rcu;
 201 };
 202
 203 /**
 204  * struct batadv_orig_bat_iv - B.A.T.M.A.N. IV private orig_node members
 205  * @bcast_own: set of bitfields (one per hard interface) where each one counts
 206  * the number of our OGMs this orig_node rebroadcasted "back" to us  (relative
 207  * to last_real_seqno). Every bitfield is BATADV_TQ_LOCAL_WINDOW_SIZE bits long.
 208  * @bcast_own_sum: sum of bcast_own
 209  * @ogm_cnt_lock: lock protecting bcast_own, bcast_own_sum,
 210  *  neigh_node->bat_iv.real_bits & neigh_node->bat_iv.real_packet_count
 211  */
 212 struct batadv_orig_bat_iv {
 213         unsigned long *bcast_own;
 214         u8 *bcast_own_sum;
 215         /* ogm_cnt_lock protects: bcast_own, bcast_own_sum,
 216          * neigh_node->bat_iv.real_bits & neigh_node->bat_iv.real_packet_count
 217          */
 218         spinlock_t ogm_cnt_lock;
 219 };
 220
 221 /**
 222  * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh
 223  * @orig: originator ethernet address
 224  * @ifinfo_list: list for routers per outgoing interface
 225  * @last_bonding_candidate: pointer to last ifinfo of last used router
 226  * @dat_addr: address of the orig node in the distributed hash
 227  * @last_seen: time when last packet from this node was received
 228  * @bcast_seqno_reset: time when the broadcast seqno window was reset
 229  * @mcast_handler_lock: synchronizes mcast-capability and -flag changes
 230  * @mcast_flags: multicast flags announced by the orig node
 231  * @mcast_want_all_unsnoopables_node: a list node for the
 232  *  mcast.want_all_unsnoopables list
 233  * @mcast_want_all_ipv4_node: a list node for the mcast.want_all_ipv4 list
 234  * @mcast_want_all_ipv6_node: a list node for the mcast.want_all_ipv6 list
 235  * @capabilities: announced capabilities of this originator
 236  * @capa_initialized: bitfield to remember whether a capability was initialized
 237  * @last_ttvn: last seen translation table version number
 238  * @tt_buff: last tt changeset this node received from the orig node
 239  * @tt_buff_len: length of the last tt changeset this node received from the
 240  *  orig node
 241  * @tt_buff_lock: lock that protects tt_buff and tt_buff_len
 242  * @tt_lock: prevents from updating the table while reading it. Table update is
 243  *  made up by two operations (data structure update and metdata -CRC/TTVN-
 244  *  recalculation) and they have to be executed atomically in order to avoid
 245  *  another thread to read the table/metadata between those.
 246  * @bcast_bits: bitfield containing the info which payload broadcast originated
 247  *  from this orig node this host already has seen (relative to
 248  *  last_bcast_seqno)
 249  * @last_bcast_seqno: last broadcast sequence number received by this host
 250  * @neigh_list: list of potential next hop neighbor towards this orig node
 251  * @neigh_list_lock: lock protecting neigh_list and router
 252  * @hash_entry: hlist node for batadv_priv::orig_hash
 253  * @bat_priv: pointer to soft_iface this orig node belongs to
 254  * @bcast_seqno_lock: lock protecting bcast_bits & last_bcast_seqno
 255  * @refcount: number of contexts the object is used
 256  * @rcu: struct used for freeing in an RCU-safe manner
 257  * @in_coding_list: list of nodes this orig can hear
 258  * @out_coding_list: list of nodes that can hear this orig
 259  * @in_coding_list_lock: protects in_coding_list
 260  * @out_coding_list_lock: protects out_coding_list
 261  * @fragments: array with heads for fragment chains
 262  * @vlan_list: a list of orig_node_vlan structs, one per VLAN served by the
 263  *  originator represented by this object
 264  * @vlan_list_lock: lock protecting vlan_list
 265  * @bat_iv: B.A.T.M.A.N. IV private structure
 266  */
 267 struct batadv_orig_node {
 268         u8 orig[ETH_ALEN];
 269         struct hlist_head ifinfo_list;
 270         struct batadv_orig_ifinfo *last_bonding_candidate;
 271 #ifdef CONFIG_BATMAN_ADV_DAT
 272         batadv_dat_addr_t dat_addr;
 273 #endif
 274         unsigned long last_seen;
 275         unsigned long bcast_seqno_reset;
 276 #ifdef CONFIG_BATMAN_ADV_MCAST
 277         /* synchronizes mcast tvlv specific orig changes */
 278         spinlock_t mcast_handler_lock;
 279         u8 mcast_flags;
 280         struct hlist_node mcast_want_all_unsnoopables_node;
 281         struct hlist_node mcast_want_all_ipv4_node;
 282         struct hlist_node mcast_want_all_ipv6_node;
 283 #endif
 284         unsigned long capabilities;
 285         unsigned long capa_initialized;
 286         atomic_t last_ttvn;
 287         unsigned char *tt_buff;
 288         s16 tt_buff_len;
 289         spinlock_t tt_buff_lock; /* protects tt_buff & tt_buff_len */
 290         /* prevents from changing the table while reading it */
 291         spinlock_t tt_lock;
 292         DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
 293         u32 last_bcast_seqno;
 294         struct hlist_head neigh_list;
 295         /* neigh_list_lock protects: neigh_list and router */
 296         spinlock_t neigh_list_lock;
 297         struct hlist_node hash_entry;
 298         struct batadv_priv *bat_priv;
 299         /* bcast_seqno_lock protects: bcast_bits & last_bcast_seqno */
 300         spinlock_t bcast_seqno_lock;
 301         atomic_t refcount;
 302         struct rcu_head rcu;
 303 #ifdef CONFIG_BATMAN_ADV_NC
 304         struct list_head in_coding_list;
 305         struct list_head out_coding_list;
 306         spinlock_t in_coding_list_lock; /* Protects in_coding_list */
 307         spinlock_t out_coding_list_lock; /* Protects out_coding_list */
 308 #endif
 309         struct batadv_frag_table_entry fragments[BATADV_FRAG_BUFFER_COUNT];
 310         struct hlist_head vlan_list;
 311         spinlock_t vlan_list_lock; /* protects vlan_list */
 312         struct batadv_orig_bat_iv bat_iv;
 313 };
 314
 315 /**
 316  * enum batadv_orig_capabilities - orig node capabilities
 317  * @BATADV_ORIG_CAPA_HAS_DAT: orig node has distributed arp table enabled
 318  * @BATADV_ORIG_CAPA_HAS_NC: orig node has network coding enabled
 319  * @BATADV_ORIG_CAPA_HAS_TT: orig node has tt capability
 320  * @BATADV_ORIG_CAPA_HAS_MCAST: orig node has some multicast capability
 321  *  (= orig node announces a tvlv of type BATADV_TVLV_MCAST)
 322  */
 323 enum batadv_orig_capabilities {
 324         BATADV_ORIG_CAPA_HAS_DAT,
 325         BATADV_ORIG_CAPA_HAS_NC,
 326         BATADV_ORIG_CAPA_HAS_TT,
 327         BATADV_ORIG_CAPA_HAS_MCAST,
 328 };
 329
 330 /**
 331  * struct batadv_gw_node - structure for orig nodes announcing gw capabilities
 332  * @list: list node for batadv_priv_gw::list
 333  * @orig_node: pointer to corresponding orig node
 334  * @bandwidth_down: advertised uplink download bandwidth
 335  * @bandwidth_up: advertised uplink upload bandwidth
 336  * @refcount: number of contexts the object is used
 337  * @rcu: struct used for freeing in an RCU-safe manner
 338  */
 339 struct batadv_gw_node {
 340         struct hlist_node list;
 341         struct batadv_orig_node *orig_node;
 342         u32 bandwidth_down;
 343         u32 bandwidth_up;
 344         atomic_t refcount;
 345         struct rcu_head rcu;
 346 };
 347
 348 /**
 349  * batadv_hardif_neigh_node - unique neighbor per hard interface
 350  * @list: list node for batadv_hard_iface::neigh_list
 351  * @addr: the MAC address of the neighboring interface
 352  * @if_incoming: pointer to incoming hard interface
 353  * @refcount: number of contexts the object is used
 354  * @rcu: struct used for freeing in a RCU-safe manner
 355  */
 356 struct batadv_hardif_neigh_node {
 357         struct hlist_node list;
 358         u8 addr[ETH_ALEN];
 359         struct batadv_hard_iface *if_incoming;
 360         unsigned long last_seen;
 361         atomic_t refcount;
 362         struct rcu_head rcu;
 363 };
 364
 365 /**
 366  * struct batadv_neigh_node - structure for single hops neighbors
 367  * @list: list node for batadv_orig_node::neigh_list
 368  * @orig_node: pointer to corresponding orig_node
 369  * @addr: the MAC address of the neighboring interface
 370  * @ifinfo_list: list for routing metrics per outgoing interface
 371  * @ifinfo_lock: lock protecting private ifinfo members and list
 372  * @if_incoming: pointer to incoming hard interface
 373  * @last_seen: when last packet via this neighbor was received
 374  * @refcount: number of contexts the object is used
 375  * @rcu: struct used for freeing in an RCU-safe manner
 376  */
 377 struct batadv_neigh_node {
 378         struct hlist_node list;
 379         struct batadv_orig_node *orig_node;
 380         u8 addr[ETH_ALEN];
 381         struct hlist_head ifinfo_list;
 382         spinlock_t ifinfo_lock; /* protects ifinfo_list and its members */
 383         struct batadv_hard_iface *if_incoming;
 384         unsigned long last_seen;
 385         atomic_t refcount;
 386         struct rcu_head rcu;
 387 };
 388
 389 /**
 390  * struct batadv_neigh_ifinfo_bat_iv - neighbor information per outgoing
 391  *  interface for BATMAN IV
 392  * @tq_recv: ring buffer of received TQ values from this neigh node
 393  * @tq_index: ring buffer index
 394  * @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv)
 395  * @real_bits: bitfield containing the number of OGMs received from this neigh
 396  *  node (relative to orig_node->last_real_seqno)
 397  * @real_packet_count: counted result of real_bits
 398  */
 399 struct batadv_neigh_ifinfo_bat_iv {
 400         u8 tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
 401         u8 tq_index;
 402         u8 tq_avg;
 403         DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
 404         u8 real_packet_count;
 405 };
 406
 407 /**
 408  * struct batadv_neigh_ifinfo - neighbor information per outgoing interface
 409  * @list: list node for batadv_neigh_node::ifinfo_list
 410  * @if_outgoing: pointer to outgoing hard interface
 411  * @bat_iv: B.A.T.M.A.N. IV private structure
 412  * @last_ttl: last received ttl from this neigh node
 413  * @refcount: number of contexts the object is used
 414  * @rcu: struct used for freeing in a RCU-safe manner
 415  */
 416 struct batadv_neigh_ifinfo {
 417         struct hlist_node list;
 418         struct batadv_hard_iface *if_outgoing;
 419         struct batadv_neigh_ifinfo_bat_iv bat_iv;
 420         u8 last_ttl;
 421         atomic_t refcount;
 422         struct rcu_head rcu;
 423 };
 424
 425 #ifdef CONFIG_BATMAN_ADV_BLA
 426
 427 /**
 428  * struct batadv_bcast_duplist_entry - structure for LAN broadcast suppression
 429  * @orig: mac address of orig node orginating the broadcast
 430  * @crc: crc32 checksum of broadcast payload
 431  * @entrytime: time when the broadcast packet was received
 432  */
 433 struct batadv_bcast_duplist_entry {
 434         u8 orig[ETH_ALEN];
 435         __be32 crc;
 436         unsigned long entrytime;
 437 };
 438 #endif
 439
 440 /**
 441  * enum batadv_counters - indices for traffic counters
 442  * @BATADV_CNT_TX: transmitted payload traffic packet counter
 443  * @BATADV_CNT_TX_BYTES: transmitted payload traffic bytes counter
 444  * @BATADV_CNT_TX_DROPPED: dropped transmission payload traffic packet counter
 445  * @BATADV_CNT_RX: received payload traffic packet counter
 446  * @BATADV_CNT_RX_BYTES: received payload traffic bytes counter
 447  * @BATADV_CNT_FORWARD: forwarded payload traffic packet counter
 448  * @BATADV_CNT_FORWARD_BYTES: forwarded payload traffic bytes counter
 449  * @BATADV_CNT_MGMT_TX: transmitted routing protocol traffic packet counter
 450  * @BATADV_CNT_MGMT_TX_BYTES: transmitted routing protocol traffic bytes counter
 451  * @BATADV_CNT_MGMT_RX: received routing protocol traffic packet counter
 452  * @BATADV_CNT_MGMT_RX_BYTES: received routing protocol traffic bytes counter
 453  * @BATADV_CNT_FRAG_TX: transmitted fragment traffic packet counter
 454  * @BATADV_CNT_FRAG_TX_BYTES: transmitted fragment traffic bytes counter
 455  * @BATADV_CNT_FRAG_RX: received fragment traffic packet counter
 456  * @BATADV_CNT_FRAG_RX_BYTES: received fragment traffic bytes counter
 457  * @BATADV_CNT_FRAG_FWD: forwarded fragment traffic packet counter
 458  * @BATADV_CNT_FRAG_FWD_BYTES: forwarded fragment traffic bytes counter
 459  * @BATADV_CNT_TT_REQUEST_TX: transmitted tt req traffic packet counter
 460  * @BATADV_CNT_TT_REQUEST_RX: received tt req traffic packet counter
 461  * @BATADV_CNT_TT_RESPONSE_TX: transmitted tt resp traffic packet counter
 462  * @BATADV_CNT_TT_RESPONSE_RX: received tt resp traffic packet counter
 463  * @BATADV_CNT_TT_ROAM_ADV_TX: transmitted tt roam traffic packet counter
 464  * @BATADV_CNT_TT_ROAM_ADV_RX: received tt roam traffic packet counter
 465  * @BATADV_CNT_DAT_GET_TX: transmitted dht GET traffic packet counter
 466  * @BATADV_CNT_DAT_GET_RX: received dht GET traffic packet counter
 467  * @BATADV_CNT_DAT_PUT_TX: transmitted dht PUT traffic packet counter
 468  * @BATADV_CNT_DAT_PUT_RX: received dht PUT traffic packet counter
 469  * @BATADV_CNT_DAT_CACHED_REPLY_TX: transmitted dat cache reply traffic packet
 470  *  counter
 471  * @BATADV_CNT_NC_CODE: transmitted nc-combined traffic packet counter
 472  * @BATADV_CNT_NC_CODE_BYTES: transmitted nc-combined traffic bytes counter
 473  * @BATADV_CNT_NC_RECODE: transmitted nc-recombined traffic packet counter
 474  * @BATADV_CNT_NC_RECODE_BYTES: transmitted nc-recombined traffic bytes counter
 475  * @BATADV_CNT_NC_BUFFER: counter for packets buffered for later nc decoding
 476  * @BATADV_CNT_NC_DECODE: received and nc-decoded traffic packet counter
 477  * @BATADV_CNT_NC_DECODE_BYTES: received and nc-decoded traffic bytes counter
 478  * @BATADV_CNT_NC_DECODE_FAILED: received and decode-failed traffic packet
 479  *  counter
 480  * @BATADV_CNT_NC_SNIFFED: counter for nc-decoded packets received in promisc
 481  *  mode.
 482  * @BATADV_CNT_NUM: number of traffic counters
 483  */
 484 enum batadv_counters {
 485         BATADV_CNT_TX,
 486         BATADV_CNT_TX_BYTES,
 487         BATADV_CNT_TX_DROPPED,
 488         BATADV_CNT_RX,
 489         BATADV_CNT_RX_BYTES,
 490         BATADV_CNT_FORWARD,
 491         BATADV_CNT_FORWARD_BYTES,
 492         BATADV_CNT_MGMT_TX,
 493         BATADV_CNT_MGMT_TX_BYTES,
 494         BATADV_CNT_MGMT_RX,
 495         BATADV_CNT_MGMT_RX_BYTES,
 496         BATADV_CNT_FRAG_TX,
 497         BATADV_CNT_FRAG_TX_BYTES,
 498         BATADV_CNT_FRAG_RX,
 499         BATADV_CNT_FRAG_RX_BYTES,
 500         BATADV_CNT_FRAG_FWD,
 501         BATADV_CNT_FRAG_FWD_BYTES,
 502         BATADV_CNT_TT_REQUEST_TX,
 503         BATADV_CNT_TT_REQUEST_RX,
 504         BATADV_CNT_TT_RESPONSE_TX,
 505         BATADV_CNT_TT_RESPONSE_RX,
 506         BATADV_CNT_TT_ROAM_ADV_TX,
 507         BATADV_CNT_TT_ROAM_ADV_RX,
 508 #ifdef CONFIG_BATMAN_ADV_DAT
 509         BATADV_CNT_DAT_GET_TX,
 510         BATADV_CNT_DAT_GET_RX,
 511         BATADV_CNT_DAT_PUT_TX,
 512         BATADV_CNT_DAT_PUT_RX,
 513         BATADV_CNT_DAT_CACHED_REPLY_TX,
 514 #endif
 515 #ifdef CONFIG_BATMAN_ADV_NC
 516         BATADV_CNT_NC_CODE,
 517         BATADV_CNT_NC_CODE_BYTES,
 518         BATADV_CNT_NC_RECODE,
 519         BATADV_CNT_NC_RECODE_BYTES,
 520         BATADV_CNT_NC_BUFFER,
 521         BATADV_CNT_NC_DECODE,
 522         BATADV_CNT_NC_DECODE_BYTES,
 523         BATADV_CNT_NC_DECODE_FAILED,
 524         BATADV_CNT_NC_SNIFFED,
 525 #endif
 526         BATADV_CNT_NUM,
 527 };
 528
 529 /**
 530  * struct batadv_priv_tt - per mesh interface translation table data
 531  * @vn: translation table version number
 532  * @ogm_append_cnt: counter of number of OGMs containing the local tt diff
 533  * @local_changes: changes registered in an originator interval
 534  * @changes_list: tracks tt local changes within an originator interval
 535  * @local_hash: local translation table hash table
 536  * @global_hash: global translation table hash table
 537  * @req_list: list of pending & unanswered tt_requests
 538  * @roam_list: list of the last roaming events of each client limiting the
 539  *  number of roaming events to avoid route flapping
 540  * @changes_list_lock: lock protecting changes_list
 541  * @req_list_lock: lock protecting req_list
 542  * @roam_list_lock: lock protecting roam_list
 543  * @last_changeset: last tt changeset this host has generated
 544  * @last_changeset_len: length of last tt changeset this host has generated
 545  * @last_changeset_lock: lock protecting last_changeset & last_changeset_len
 546  * @commit_lock: prevents from executing a local TT commit while reading the
 547  *  local table. The local TT commit is made up by two operations (data
 548  *  structure update and metdata -CRC/TTVN- recalculation) and they have to be
 549  *  executed atomically in order to avoid another thread to read the
 550  *  table/metadata between those.
 551  * @work: work queue callback item for translation table purging
 552  */
 553 struct batadv_priv_tt {
 554         atomic_t vn;
 555         atomic_t ogm_append_cnt;
 556         atomic_t local_changes;
 557         struct list_head changes_list;
 558         struct batadv_hashtable *local_hash;
 559         struct batadv_hashtable *global_hash;
 560         struct hlist_head req_list;
 561         struct list_head roam_list;
 562         spinlock_t changes_list_lock; /* protects changes */
 563         spinlock_t req_list_lock; /* protects req_list */
 564         spinlock_t roam_list_lock; /* protects roam_list */
 565         unsigned char *last_changeset;
 566         s16 last_changeset_len;
 567         /* protects last_changeset & last_changeset_len */
 568         spinlock_t last_changeset_lock;
 569         /* prevents from executing a commit while reading the table */
 570         spinlock_t commit_lock;
 571         struct delayed_work work;
 572 };
 573
 574 #ifdef CONFIG_BATMAN_ADV_BLA
 575
 576 /**
 577  * struct batadv_priv_bla - per mesh interface bridge loope avoidance data
 578  * @num_requests: number of bla requests in flight
 579  * @claim_hash: hash table containing mesh nodes this host has claimed
 580  * @backbone_hash: hash table containing all detected backbone gateways
 581  * @bcast_duplist: recently received broadcast packets array (for broadcast
 582  *  duplicate suppression)
 583  * @bcast_duplist_curr: index of last broadcast packet added to bcast_duplist
 584  * @bcast_duplist_lock: lock protecting bcast_duplist & bcast_duplist_curr
 585  * @claim_dest: local claim data (e.g. claim group)
 586  * @work: work queue callback item for cleanups & bla announcements
 587  */
 588 struct batadv_priv_bla {
 589         atomic_t num_requests;
 590         struct batadv_hashtable *claim_hash;
 591         struct batadv_hashtable *backbone_hash;
 592         struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE];
 593         int bcast_duplist_curr;
 594         /* protects bcast_duplist & bcast_duplist_curr */
 595         spinlock_t bcast_duplist_lock;
 596         struct batadv_bla_claim_dst claim_dest;
 597         struct delayed_work work;
 598 };
 599 #endif
 600
 601 #ifdef CONFIG_BATMAN_ADV_DEBUG
 602
 603 /**
 604  * struct batadv_priv_debug_log - debug logging data
 605  * @log_buff: buffer holding the logs (ring bufer)
 606  * @log_start: index of next character to read
 607  * @log_end: index of next character to write
 608  * @lock: lock protecting log_buff, log_start & log_end
 609  * @queue_wait: log reader's wait queue
 610  */
 611 struct batadv_priv_debug_log {
 612         char log_buff[BATADV_LOG_BUF_LEN];
 613         unsigned long log_start;
 614         unsigned long log_end;
 615         spinlock_t lock; /* protects log_buff, log_start and log_end */
 616         wait_queue_head_t queue_wait;
 617 };
 618 #endif
 619
 620 /**
 621  * struct batadv_priv_gw - per mesh interface gateway data
 622  * @list: list of available gateway nodes
 623  * @list_lock: lock protecting gw_list & curr_gw
 624  * @curr_gw: pointer to currently selected gateway node
 625  * @bandwidth_down: advertised uplink download bandwidth (if gw_mode server)
 626  * @bandwidth_up: advertised uplink upload bandwidth (if gw_mode server)
 627  * @reselect: bool indicating a gateway re-selection is in progress
 628  */
 629 struct batadv_priv_gw {
 630         struct hlist_head list;
 631         spinlock_t list_lock; /* protects gw_list & curr_gw */
 632         struct batadv_gw_node __rcu *curr_gw;  /* rcu protected pointer */
 633         atomic_t bandwidth_down;
 634         atomic_t bandwidth_up;
 635         atomic_t reselect;
 636 };
 637
 638 /**
 639  * struct batadv_priv_tvlv - per mesh interface tvlv data
 640  * @container_list: list of registered tvlv containers to be sent with each OGM
 641  * @handler_list: list of the various tvlv content handlers
 642  * @container_list_lock: protects tvlv container list access
 643  * @handler_list_lock: protects handler list access
 644  */
 645 struct batadv_priv_tvlv {
 646         struct hlist_head container_list;
 647         struct hlist_head handler_list;
 648         spinlock_t container_list_lock; /* protects container_list */
 649         spinlock_t handler_list_lock; /* protects handler_list */
 650 };
 651
 652 #ifdef CONFIG_BATMAN_ADV_DAT
 653
 654 /**
 655  * struct batadv_priv_dat - per mesh interface DAT private data
 656  * @addr: node DAT address
 657  * @hash: hashtable representing the local ARP cache
 658  * @work: work queue callback item for cache purging
 659  */
 660 struct batadv_priv_dat {
 661         batadv_dat_addr_t addr;
 662         struct batadv_hashtable *hash;
 663         struct delayed_work work;
 664 };
 665 #endif
 666
 667 #ifdef CONFIG_BATMAN_ADV_MCAST
 668 /**
 669  * struct batadv_priv_mcast - per mesh interface mcast data
 670  * @mla_list: list of multicast addresses we are currently announcing via TT
 671  * @want_all_unsnoopables_list: a list of orig_nodes wanting all unsnoopable
 672  *  multicast traffic
 673  * @want_all_ipv4_list: a list of orig_nodes wanting all IPv4 multicast traffic
 674  * @want_all_ipv6_list: a list of orig_nodes wanting all IPv6 multicast traffic
 675  * @flags: the flags we have last sent in our mcast tvlv
 676  * @enabled: whether the multicast tvlv is currently enabled
 677  * @num_disabled: number of nodes that have no mcast tvlv
 678  * @num_want_all_unsnoopables: number of nodes wanting unsnoopable IP traffic
 679  * @num_want_all_ipv4: counter for items in want_all_ipv4_list
 680  * @num_want_all_ipv6: counter for items in want_all_ipv6_list
 681  * @want_lists_lock: lock for protecting modifications to mcast want lists
 682  *  (traversals are rcu-locked)
 683  */
 684 struct batadv_priv_mcast {
 685         struct hlist_head mla_list;
 686         struct hlist_head want_all_unsnoopables_list;
 687         struct hlist_head want_all_ipv4_list;
 688         struct hlist_head want_all_ipv6_list;
 689         u8 flags;
 690         bool enabled;
 691         atomic_t num_disabled;
 692         atomic_t num_want_all_unsnoopables;
 693         atomic_t num_want_all_ipv4;
 694         atomic_t num_want_all_ipv6;
 695         /* protects want_all_{unsnoopables,ipv4,ipv6}_list */
 696         spinlock_t want_lists_lock;
 697 };
 698 #endif
 699
 700 /**
 701  * struct batadv_priv_nc - per mesh interface network coding private data
 702  * @work: work queue callback item for cleanup
 703  * @debug_dir: dentry for nc subdir in batman-adv directory in debugfs
 704  * @min_tq: only consider neighbors for encoding if neigh_tq > min_tq
 705  * @max_fwd_delay: maximum packet forward delay to allow coding of packets
 706  * @max_buffer_time: buffer time for sniffed packets used to decoding
 707  * @timestamp_fwd_flush: timestamp of last forward packet queue flush
 708  * @timestamp_sniffed_purge: timestamp of last sniffed packet queue purge
 709  * @coding_hash: Hash table used to buffer skbs while waiting for another
 710  *  incoming skb to code it with. Skbs are added to the buffer just before being
 711  *  forwarded in routing.c
 712  * @decoding_hash: Hash table used to buffer skbs that might be needed to decode
 713  *  a received coded skb. The buffer is used for 1) skbs arriving on the
 714  *  soft-interface; 2) skbs overheard on the hard-interface; and 3) skbs
 715  *  forwarded by batman-adv.
 716  */
 717 struct batadv_priv_nc {
 718         struct delayed_work work;
 719         struct dentry *debug_dir;
 720         u8 min_tq;
 721         u32 max_fwd_delay;
 722         u32 max_buffer_time;
 723         unsigned long timestamp_fwd_flush;
 724         unsigned long timestamp_sniffed_purge;
 725         struct batadv_hashtable *coding_hash;
 726         struct batadv_hashtable *decoding_hash;
 727 };
 728
 729 /**
 730  * struct batadv_softif_vlan - per VLAN attributes set
 731  * @bat_priv: pointer to the mesh object
 732  * @vid: VLAN identifier
 733  * @kobj: kobject for sysfs vlan subdirectory
 734  * @ap_isolation: AP isolation state
 735  * @tt: TT private attributes (VLAN specific)
 736  * @list: list node for bat_priv::softif_vlan_list
 737  * @refcount: number of context where this object is currently in use
 738  * @rcu: struct used for freeing in a RCU-safe manner
 739  */
 740 struct batadv_softif_vlan {
 741         struct batadv_priv *bat_priv;
 742         unsigned short vid;
 743         struct kobject *kobj;
 744         atomic_t ap_isolation;          /* boolean */
 745         struct batadv_vlan_tt tt;
 746         struct hlist_node list;
 747         atomic_t refcount;
 748         struct rcu_head rcu;
 749 };
 750
 751 /**
 752  * struct batadv_priv - per mesh interface data
 753  * @mesh_state: current status of the mesh (inactive/active/deactivating)
 754  * @soft_iface: net device which holds this struct as private data
 755  * @stats: structure holding the data for the ndo_get_stats() call
 756  * @bat_counters: mesh internal traffic statistic counters (see batadv_counters)
 757  * @aggregated_ogms: bool indicating whether OGM aggregation is enabled
 758  * @bonding: bool indicating whether traffic bonding is enabled
 759  * @fragmentation: bool indicating whether traffic fragmentation is enabled
 760  * @packet_size_max: max packet size that can be transmitted via
 761  *  multiple fragmented skbs or a single frame if fragmentation is disabled
 762  * @frag_seqno: incremental counter to identify chains of egress fragments
 763  * @bridge_loop_avoidance: bool indicating whether bridge loop avoidance is
 764  *  enabled
 765  * @distributed_arp_table: bool indicating whether distributed ARP table is
 766  *  enabled
 767  * @multicast_mode: Enable or disable multicast optimizations on this node's
 768  *  sender/originating side
 769  * @gw_mode: gateway operation: off, client or server (see batadv_gw_modes)
 770  * @gw_sel_class: gateway selection class (applies if gw_mode client)
 771  * @orig_interval: OGM broadcast interval in milliseconds
 772  * @hop_penalty: penalty which will be applied to an OGM's tq-field on every hop
 773  * @log_level: configured log level (see batadv_dbg_level)
 774  * @bcast_seqno: last sent broadcast packet sequence number
 775  * @bcast_queue_left: number of remaining buffered broadcast packet slots
 776  * @batman_queue_left: number of remaining OGM packet slots
 777  * @num_ifaces: number of interfaces assigned to this mesh interface
 778  * @mesh_obj: kobject for sysfs mesh subdirectory
 779  * @debug_dir: dentry for debugfs batman-adv subdirectory
 780  * @forw_bat_list: list of aggregated OGMs that will be forwarded
 781  * @forw_bcast_list: list of broadcast packets that will be rebroadcasted
 782  * @orig_hash: hash table containing mesh participants (orig nodes)
 783  * @forw_bat_list_lock: lock protecting forw_bat_list
 784  * @forw_bcast_list_lock: lock protecting forw_bcast_list
 785  * @orig_work: work queue callback item for orig node purging
 786  * @cleanup_work: work queue callback item for soft interface deinit
 787  * @primary_if: one of the hard interfaces assigned to this mesh interface
 788  *  becomes the primary interface
 789  * @bat_algo_ops: routing algorithm used by this mesh interface
 790  * @softif_vlan_list: a list of softif_vlan structs, one per VLAN created on top
 791  *  of the mesh interface represented by this object
 792  * @softif_vlan_list_lock: lock protecting softif_vlan_list
 793  * @bla: bridge loope avoidance data
 794  * @debug_log: holding debug logging relevant data
 795  * @gw: gateway data
 796  * @tt: translation table data
 797  * @tvlv: type-version-length-value data
 798  * @dat: distributed arp table data
 799  * @mcast: multicast data
 800  * @network_coding: bool indicating whether network coding is enabled
 801  * @nc: network coding data
 802  */
 803 struct batadv_priv {
 804         atomic_t mesh_state;
 805         struct net_device *soft_iface;
 806         struct net_device_stats stats;
 807         u64 __percpu *bat_counters; /* Per cpu counters */
 808         atomic_t aggregated_ogms;
 809         atomic_t bonding;
 810         atomic_t fragmentation;
 811         atomic_t packet_size_max;
 812         atomic_t frag_seqno;
 813 #ifdef CONFIG_BATMAN_ADV_BLA
 814         atomic_t bridge_loop_avoidance;
 815 #endif
 816 #ifdef CONFIG_BATMAN_ADV_DAT
 817         atomic_t distributed_arp_table;
 818 #endif
 819 #ifdef CONFIG_BATMAN_ADV_MCAST
 820         atomic_t multicast_mode;
 821 #endif
 822         atomic_t gw_mode;
 823         atomic_t gw_sel_class;
 824         atomic_t orig_interval;
 825         atomic_t hop_penalty;
 826 #ifdef CONFIG_BATMAN_ADV_DEBUG
 827         atomic_t log_level;
 828 #endif
 829         u32 isolation_mark;
 830         u32 isolation_mark_mask;
 831         atomic_t bcast_seqno;
 832         atomic_t bcast_queue_left;
 833         atomic_t batman_queue_left;
 834         char num_ifaces;
 835         struct kobject *mesh_obj;
 836         struct dentry *debug_dir;
 837         struct hlist_head forw_bat_list;
 838         struct hlist_head forw_bcast_list;
 839         struct batadv_hashtable *orig_hash;
 840         spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
 841         spinlock_t forw_bcast_list_lock; /* protects forw_bcast_list */
 842         struct delayed_work orig_work;
 843         struct work_struct cleanup_work;
 844         struct batadv_hard_iface __rcu *primary_if;  /* rcu protected pointer */
 845         struct batadv_algo_ops *bat_algo_ops;
 846         struct hlist_head softif_vlan_list;
 847         spinlock_t softif_vlan_list_lock; /* protects softif_vlan_list */
 848 #ifdef CONFIG_BATMAN_ADV_BLA
 849         struct batadv_priv_bla bla;
 850 #endif
 851 #ifdef CONFIG_BATMAN_ADV_DEBUG
 852         struct batadv_priv_debug_log *debug_log;
 853 #endif
 854         struct batadv_priv_gw gw;
 855         struct batadv_priv_tt tt;
 856         struct batadv_priv_tvlv tvlv;
 857 #ifdef CONFIG_BATMAN_ADV_DAT
 858         struct batadv_priv_dat dat;
 859 #endif
 860 #ifdef CONFIG_BATMAN_ADV_MCAST
 861         struct batadv_priv_mcast mcast;
 862 #endif
 863 #ifdef CONFIG_BATMAN_ADV_NC
 864         atomic_t network_coding;
 865         struct batadv_priv_nc nc;
 866 #endif /* CONFIG_BATMAN_ADV_NC */
 867 };
 868
 869 /**
 870  * struct batadv_socket_client - layer2 icmp socket client data
 871  * @queue_list: packet queue for packets destined for this socket client
 872  * @queue_len: number of packets in the packet queue (queue_list)
 873  * @index: socket client's index in the batadv_socket_client_hash
 874  * @lock: lock protecting queue_list, queue_len & index
 875  * @queue_wait: socket client's wait queue
 876  * @bat_priv: pointer to soft_iface this client belongs to
 877  */
 878 struct batadv_socket_client {
 879         struct list_head queue_list;
 880         unsigned int queue_len;
 881         unsigned char index;
 882         spinlock_t lock; /* protects queue_list, queue_len & index */
 883         wait_queue_head_t queue_wait;
 884         struct batadv_priv *bat_priv;
 885 };
 886
 887 /**
 888  * struct batadv_socket_packet - layer2 icmp packet for socket client
 889  * @list: list node for batadv_socket_client::queue_list
 890  * @icmp_len: size of the layer2 icmp packet
 891  * @icmp_packet: layer2 icmp packet
 892  */
 893 struct batadv_socket_packet {
 894         struct list_head list;
 895         size_t icmp_len;
 896         u8 icmp_packet[BATADV_ICMP_MAX_PACKET_SIZE];
 897 };
 898
 899 #ifdef CONFIG_BATMAN_ADV_BLA
 900
 901 /**
 902  * struct batadv_bla_backbone_gw - batman-adv gateway bridged into the LAN
 903  * @orig: originator address of backbone node (mac address of primary iface)
 904  * @vid: vlan id this gateway was detected on
 905  * @hash_entry: hlist node for batadv_priv_bla::backbone_hash
 906  * @bat_priv: pointer to soft_iface this backbone gateway belongs to
 907  * @lasttime: last time we heard of this backbone gw
 908  * @wait_periods: grace time for bridge forward delays and bla group forming at
 909  *  bootup phase - no bcast traffic is formwared until it has elapsed
 910  * @request_sent: if this bool is set to true we are out of sync with this
 911  *  backbone gateway - no bcast traffic is formwared until the situation was
 912  *  resolved
 913  * @crc: crc16 checksum over all claims
 914  * @crc_lock: lock protecting crc
 915  * @refcount: number of contexts the object is used
 916  * @rcu: struct used for freeing in an RCU-safe manner
 917  */
 918 struct batadv_bla_backbone_gw {
 919         u8 orig[ETH_ALEN];
 920         unsigned short vid;
 921         struct hlist_node hash_entry;
 922         struct batadv_priv *bat_priv;
 923         unsigned long lasttime;
 924         atomic_t wait_periods;
 925         atomic_t request_sent;
 926         u16 crc;
 927         spinlock_t crc_lock; /* protects crc */
 928         atomic_t refcount;
 929         struct rcu_head rcu;
 930 };
 931
 932 /**
 933  * struct batadv_bla_claim - claimed non-mesh client structure
 934  * @addr: mac address of claimed non-mesh client
 935  * @vid: vlan id this client was detected on
 936  * @backbone_gw: pointer to backbone gw claiming this client
 937  * @lasttime: last time we heard of claim (locals only)
 938  * @hash_entry: hlist node for batadv_priv_bla::claim_hash
 939  * @refcount: number of contexts the object is used
 940  * @rcu: struct used for freeing in an RCU-safe manner
 941  */
 942 struct batadv_bla_claim {
 943         u8 addr[ETH_ALEN];
 944         unsigned short vid;
 945         struct batadv_bla_backbone_gw *backbone_gw;
 946         unsigned long lasttime;
 947         struct hlist_node hash_entry;
 948         struct rcu_head rcu;
 949         atomic_t refcount;
 950 };
 951 #endif
 952
 953 /**
 954  * struct batadv_tt_common_entry - tt local & tt global common data
 955  * @addr: mac address of non-mesh client
 956  * @vid: VLAN identifier
 957  * @hash_entry: hlist node for batadv_priv_tt::local_hash or for
 958  *  batadv_priv_tt::global_hash
 959  * @flags: various state handling flags (see batadv_tt_client_flags)
 960  * @added_at: timestamp used for purging stale tt common entries
 961  * @refcount: number of contexts the object is used
 962  * @rcu: struct used for freeing in an RCU-safe manner
 963  */
 964 struct batadv_tt_common_entry {
 965         u8 addr[ETH_ALEN];
 966         unsigned short vid;
 967         struct hlist_node hash_entry;
 968         u16 flags;
 969         unsigned long added_at;
 970         atomic_t refcount;
 971         struct rcu_head rcu;
 972 };
 973
 974 /**
 975  * struct batadv_tt_local_entry - translation table local entry data
 976  * @common: general translation table data
 977  * @last_seen: timestamp used for purging stale tt local entries
 978  */
 979 struct batadv_tt_local_entry {
 980         struct batadv_tt_common_entry common;
 981         unsigned long last_seen;
 982 };
 983
 984 /**
 985  * struct batadv_tt_global_entry - translation table global entry data
 986  * @common: general translation table data
 987  * @orig_list: list of orig nodes announcing this non-mesh client
 988  * @orig_list_count: number of items in the orig_list
 989  * @list_lock: lock protecting orig_list
 990  * @roam_at: time at which TT_GLOBAL_ROAM was set
 991  */
 992 struct batadv_tt_global_entry {
 993         struct batadv_tt_common_entry common;
 994         struct hlist_head orig_list;
 995         atomic_t orig_list_count;
 996         spinlock_t list_lock;   /* protects orig_list */
 997         unsigned long roam_at;
 998 };
 999
1000 /**
1001  * struct batadv_tt_orig_list_entry - orig node announcing a non-mesh client
1002  * @orig_node: pointer to orig node announcing this non-mesh client
1003  * @ttvn: translation table version number which added the non-mesh client
1004  * @list: list node for batadv_tt_global_entry::orig_list
1005  * @refcount: number of contexts the object is used
1006  * @rcu: struct used for freeing in an RCU-safe manner
1007  */
1008 struct batadv_tt_orig_list_entry {
1009         struct batadv_orig_node *orig_node;
1010         u8 ttvn;
1011         struct hlist_node list;
1012         atomic_t refcount;
1013         struct rcu_head rcu;
1014 };
1015
1016 /**
1017  * struct batadv_tt_change_node - structure for tt changes occurred
1018  * @list: list node for batadv_priv_tt::changes_list
1019  * @change: holds the actual translation table diff data
1020  */
1021 struct batadv_tt_change_node {
1022         struct list_head list;
1023         struct batadv_tvlv_tt_change change;
1024 };
1025
1026 /**
1027  * struct batadv_tt_req_node - data to keep track of the tt requests in flight
1028  * @addr: mac address address of the originator this request was sent to
1029  * @issued_at: timestamp used for purging stale tt requests
1030  * @list: list node for batadv_priv_tt::req_list
1031  */
1032 struct batadv_tt_req_node {
1033         u8 addr[ETH_ALEN];
1034         unsigned long issued_at;
1035         struct hlist_node list;
1036 };
1037
1038 /**
1039  * struct batadv_tt_roam_node - roaming client data
1040  * @addr: mac address of the client in the roaming phase
1041  * @counter: number of allowed roaming events per client within a single
1042  *  OGM interval (changes are committed with each OGM)
1043  * @first_time: timestamp used for purging stale roaming node entries
1044  * @list: list node for batadv_priv_tt::roam_list
1045  */
1046 struct batadv_tt_roam_node {
1047         u8 addr[ETH_ALEN];
1048         atomic_t counter;
1049         unsigned long first_time;
1050         struct list_head list;
1051 };
1052
1053 /**
1054  * struct batadv_nc_node - network coding node
1055  * @list: next and prev pointer for the list handling
1056  * @addr: the node's mac address
1057  * @refcount: number of contexts the object is used by
1058  * @rcu: struct used for freeing in an RCU-safe manner
1059  * @orig_node: pointer to corresponding orig node struct
1060  * @last_seen: timestamp of last ogm received from this node
1061  */
1062 struct batadv_nc_node {
1063         struct list_head list;
1064         u8 addr[ETH_ALEN];
1065         atomic_t refcount;
1066         struct rcu_head rcu;
1067         struct batadv_orig_node *orig_node;
1068         unsigned long last_seen;
1069 };
1070
1071 /**
1072  * struct batadv_nc_path - network coding path
1073  * @hash_entry: next and prev pointer for the list handling
1074  * @rcu: struct used for freeing in an RCU-safe manner
1075  * @refcount: number of contexts the object is used by
1076  * @packet_list: list of buffered packets for this path
1077  * @packet_list_lock: access lock for packet list
1078  * @next_hop: next hop (destination) of path
1079  * @prev_hop: previous hop (source) of path
1080  * @last_valid: timestamp for last validation of path
1081  */
1082 struct batadv_nc_path {
1083         struct hlist_node hash_entry;
1084         struct rcu_head rcu;
1085         atomic_t refcount;
1086         struct list_head packet_list;
1087         spinlock_t packet_list_lock; /* Protects packet_list */
1088         u8 next_hop[ETH_ALEN];
1089         u8 prev_hop[ETH_ALEN];
1090         unsigned long last_valid;
1091 };
1092
1093 /**
1094  * struct batadv_nc_packet - network coding packet used when coding and
1095  *  decoding packets
1096  * @list: next and prev pointer for the list handling
1097  * @packet_id: crc32 checksum of skb data
1098  * @timestamp: field containing the info when the packet was added to path
1099  * @neigh_node: pointer to original next hop neighbor of skb
1100  * @skb: skb which can be encoded or used for decoding
1101  * @nc_path: pointer to path this nc packet is attached to
1102  */
1103 struct batadv_nc_packet {
1104         struct list_head list;
1105         __be32 packet_id;
1106         unsigned long timestamp;
1107         struct batadv_neigh_node *neigh_node;
1108         struct sk_buff *skb;
1109         struct batadv_nc_path *nc_path;
1110 };
1111
1112 /**
1113  * struct batadv_skb_cb - control buffer structure used to store private data
1114  *  relevant to batman-adv in the skb->cb buffer in skbs.
1115  * @decoded: Marks a skb as decoded, which is checked when searching for coding
1116  *  opportunities in network-coding.c
1117  */
1118 struct batadv_skb_cb {
1119         bool decoded;
1120 };
1121
1122 /**
1123  * struct batadv_forw_packet - structure for bcast packets to be sent/forwarded
1124  * @list: list node for batadv_socket_client::queue_list
1125  * @send_time: execution time for delayed_work (packet sending)
1126  * @own: bool for locally generated packets (local OGMs are re-scheduled after
1127  *  sending)
1128  * @skb: bcast packet's skb buffer
1129  * @packet_len: size of aggregated OGM packet inside the skb buffer
1130  * @direct_link_flags: direct link flags for aggregated OGM packets
1131  * @num_packets: counter for bcast packet retransmission
1132  * @delayed_work: work queue callback item for packet sending
1133  * @if_incoming: pointer to incoming hard-iface or primary iface if
1134  *  locally generated packet
1135  * @if_outgoing: packet where the packet should be sent to, or NULL if
1136  *  unspecified
1137  */
1138 struct batadv_forw_packet {
1139         struct hlist_node list;
1140         unsigned long send_time;
1141         u8 own;
1142         struct sk_buff *skb;
1143         u16 packet_len;
1144         u32 direct_link_flags;
1145         u8 num_packets;
1146         struct delayed_work delayed_work;
1147         struct batadv_hard_iface *if_incoming;
1148         struct batadv_hard_iface *if_outgoing;
1149 };
1150
1151 /**
1152  * struct batadv_algo_ops - mesh algorithm callbacks
1153  * @list: list node for the batadv_algo_list
1154  * @name: name of the algorithm
1155  * @bat_iface_enable: init routing info when hard-interface is enabled
1156  * @bat_iface_disable: de-init routing info when hard-interface is disabled
1157  * @bat_iface_update_mac: (re-)init mac addresses of the protocol information
1158  *  belonging to this hard-interface
1159  * @bat_primary_iface_set: called when primary interface is selected / changed
1160  * @bat_ogm_schedule: prepare a new outgoing OGM for the send queue
1161  * @bat_ogm_emit: send scheduled OGM
1162  * @bat_hardif_neigh_init: called on creation of single hop entry
1163  * @bat_neigh_cmp: compare the metrics of two neighbors for their respective
1164  *  outgoing interfaces
1165  * @bat_neigh_is_similar_or_better: check if neigh1 is equally similar or
1166  *  better than neigh2 for their respective outgoing interface from the metric
1167  *  prospective
1168  * @bat_neigh_print: print the single hop neighbor list (optional)
1169  * @bat_neigh_free: free the resources allocated by the routing algorithm for a
1170  *  neigh_node object
1171  * @bat_orig_print: print the originator table (optional)
1172  * @bat_orig_free: free the resources allocated by the routing algorithm for an
1173  *  orig_node object
1174  * @bat_orig_add_if: ask the routing algorithm to apply the needed changes to
1175  *  the orig_node due to a new hard-interface being added into the mesh
1176  * @bat_orig_del_if: ask the routing algorithm to apply the needed changes to
1177  *  the orig_node due to an hard-interface being removed from the mesh
1178  */
1179 struct batadv_algo_ops {
1180         struct hlist_node list;
1181         char *name;
1182         int (*bat_iface_enable)(struct batadv_hard_iface *hard_iface);
1183         void (*bat_iface_disable)(struct batadv_hard_iface *hard_iface);
1184         void (*bat_iface_update_mac)(struct batadv_hard_iface *hard_iface);
1185         void (*bat_primary_iface_set)(struct batadv_hard_iface *hard_iface);
1186         void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface);
1187         void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet);
1188         /* neigh_node handling API */
1189         void (*bat_hardif_neigh_init)(struct batadv_hardif_neigh_node *neigh);
1190         int (*bat_neigh_cmp)(struct batadv_neigh_node *neigh1,
1191                              struct batadv_hard_iface *if_outgoing1,
1192                              struct batadv_neigh_node *neigh2,
1193                              struct batadv_hard_iface *if_outgoing2);
1194         bool (*bat_neigh_is_similar_or_better)
1195                 (struct batadv_neigh_node *neigh1,
1196                  struct batadv_hard_iface *if_outgoing1,
1197                  struct batadv_neigh_node *neigh2,
1198                  struct batadv_hard_iface *if_outgoing2);
1199         void (*bat_neigh_print)(struct batadv_priv *priv, struct seq_file *seq);
1200         void (*bat_neigh_free)(struct batadv_neigh_node *neigh);
1201         /* orig_node handling API */
1202         void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq,
1203                                struct batadv_hard_iface *hard_iface);
1204         void (*bat_orig_free)(struct batadv_orig_node *orig_node);
1205         int (*bat_orig_add_if)(struct batadv_orig_node *orig_node,
1206                                int max_if_num);
1207         int (*bat_orig_del_if)(struct batadv_orig_node *orig_node,
1208                                int max_if_num, int del_if_num);
1209 };
1210
1211 /**
1212  * struct batadv_dat_entry - it is a single entry of batman-adv ARP backend. It
1213  * is used to stored ARP entries needed for the global DAT cache
1214  * @ip: the IPv4 corresponding to this DAT/ARP entry
1215  * @mac_addr: the MAC address associated to the stored IPv4
1216  * @vid: the vlan ID associated to this entry
1217  * @last_update: time in jiffies when this entry was refreshed last time
1218  * @hash_entry: hlist node for batadv_priv_dat::hash
1219  * @refcount: number of contexts the object is used
1220  * @rcu: struct used for freeing in an RCU-safe manner
1221  */
1222 struct batadv_dat_entry {
1223         __be32 ip;
1224         u8 mac_addr[ETH_ALEN];
1225         unsigned short vid;
1226         unsigned long last_update;
1227         struct hlist_node hash_entry;
1228         atomic_t refcount;
1229         struct rcu_head rcu;
1230 };
1231
1232 /**
1233  * struct batadv_hw_addr - a list entry for a MAC address
1234  * @list: list node for the linking of entries
1235  * @addr: the MAC address of this list entry
1236  */
1237 struct batadv_hw_addr {
1238         struct hlist_node list;
1239         unsigned char addr[ETH_ALEN];
1240 };
1241
1242 /**
1243  * struct batadv_dat_candidate - candidate destination for DAT operations
1244  * @type: the type of the selected candidate. It can one of the following:
1245  *        - BATADV_DAT_CANDIDATE_NOT_FOUND
1246  *        - BATADV_DAT_CANDIDATE_ORIG
1247  * @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to the
1248  *             corresponding originator node structure
1249  */
1250 struct batadv_dat_candidate {
1251         int type;
1252         struct batadv_orig_node *orig_node;
1253 };
1254
1255 /**
1256  * struct batadv_tvlv_container - container for tvlv appended to OGMs
1257  * @list: hlist node for batadv_priv_tvlv::container_list
1258  * @tvlv_hdr: tvlv header information needed to construct the tvlv
1259  * @refcount: number of contexts the object is used
1260  */
1261 struct batadv_tvlv_container {
1262         struct hlist_node list;
1263         struct batadv_tvlv_hdr tvlv_hdr;
1264         atomic_t refcount;
1265 };
1266
1267 /**
1268  * struct batadv_tvlv_handler - handler for specific tvlv type and version
1269  * @list: hlist node for batadv_priv_tvlv::handler_list
1270  * @ogm_handler: handler callback which is given the tvlv payload to process on
1271  *  incoming OGM packets
1272  * @unicast_handler: handler callback which is given the tvlv payload to process
1273  *  on incoming unicast tvlv packets
1274  * @type: tvlv type this handler feels responsible for
1275  * @version: tvlv version this handler feels responsible for
1276  * @flags: tvlv handler flags
1277  * @refcount: number of contexts the object is used
1278  * @rcu: struct used for freeing in an RCU-safe manner
1279  */
1280 struct batadv_tvlv_handler {
1281         struct hlist_node list;
1282         void (*ogm_handler)(struct batadv_priv *bat_priv,
1283                             struct batadv_orig_node *orig,
1284                             u8 flags, void *tvlv_value, u16 tvlv_value_len);
1285         int (*unicast_handler)(struct batadv_priv *bat_priv,
1286                                u8 *src, u8 *dst,
1287                                void *tvlv_value, u16 tvlv_value_len);
1288         u8 type;
1289         u8 version;
1290         u8 flags;
1291         atomic_t refcount;
1292         struct rcu_head rcu;
1293 };
1294
1295 /**
1296  * enum batadv_tvlv_handler_flags - tvlv handler flags definitions
1297  * @BATADV_TVLV_HANDLER_OGM_CIFNOTFND: tvlv ogm processing function will call
1298  *  this handler even if its type was not found (with no data)
1299  * @BATADV_TVLV_HANDLER_OGM_CALLED: interval tvlv handling flag - the API marks
1300  *  a handler as being called, so it won't be called if the
1301  *  BATADV_TVLV_HANDLER_OGM_CIFNOTFND flag was set
1302  */
1303 enum batadv_tvlv_handler_flags {
1304         BATADV_TVLV_HANDLER_OGM_CIFNOTFND = BIT(1),
1305         BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2),
1306 };
1307
1308 #endif /* _NET_BATMAN_ADV_TYPES_H_ */