/* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ #ifndef _NET_BATMAN_ADV_TYPES_H_ #define _NET_BATMAN_ADV_TYPES_H_ #ifndef _NET_BATMAN_ADV_MAIN_H_ #error only "main.h" can be included directly #endif #include #include #include #include #include #include #include #include /* for linux/wait.h */ #include #include #include #include #include #include "packet.h" struct seq_file; #ifdef CONFIG_BATMAN_ADV_DAT /** * batadv_dat_addr_t - it is the type used for all DHT addresses. If it is * changed, BATADV_DAT_ADDR_MAX is changed as well. * * *Please be careful: batadv_dat_addr_t must be UNSIGNED* */ #define batadv_dat_addr_t u16 #endif /* CONFIG_BATMAN_ADV_DAT */ /** * enum batadv_dhcp_recipient - dhcp destination * @BATADV_DHCP_NO: packet is not a dhcp message * @BATADV_DHCP_TO_SERVER: dhcp message is directed to a server * @BATADV_DHCP_TO_CLIENT: dhcp message is directed to a client */ enum batadv_dhcp_recipient { BATADV_DHCP_NO = 0, BATADV_DHCP_TO_SERVER, BATADV_DHCP_TO_CLIENT, }; /** * BATADV_TT_REMOTE_MASK - bitmask selecting the flags that are sent over the * wire only */ #define BATADV_TT_REMOTE_MASK 0x00FF /** * BATADV_TT_SYNC_MASK - bitmask of the flags that need to be kept in sync * among the nodes. These flags are used to compute the global/local CRC */ #define BATADV_TT_SYNC_MASK 0x00F0 /** * struct batadv_hard_iface_bat_iv - per hard-interface B.A.T.M.A.N. IV data * @ogm_buff: buffer holding the OGM packet * @ogm_buff_len: length of the OGM packet buffer * @ogm_seqno: OGM sequence number - used to identify each OGM */ struct batadv_hard_iface_bat_iv { unsigned char *ogm_buff; int ogm_buff_len; atomic_t ogm_seqno; }; /** * enum batadv_v_hard_iface_flags - interface flags useful to B.A.T.M.A.N. V * @BATADV_FULL_DUPLEX: tells if the connection over this link is full-duplex * @BATADV_WARNING_DEFAULT: tells whether we have warned the user that no * throughput data is available for this interface and that default values are * assumed. */ enum batadv_v_hard_iface_flags { BATADV_FULL_DUPLEX = BIT(0), BATADV_WARNING_DEFAULT = BIT(1), }; /** * struct batadv_hard_iface_bat_v - per hard-interface B.A.T.M.A.N. V data * @elp_interval: time interval between two ELP transmissions * @elp_seqno: current ELP sequence number * @elp_skb: base skb containing the ELP message to send * @elp_wq: workqueue used to schedule ELP transmissions * @throughput_override: throughput override to disable link auto-detection * @flags: interface specific flags */ struct batadv_hard_iface_bat_v { atomic_t elp_interval; atomic_t elp_seqno; struct sk_buff *elp_skb; struct delayed_work elp_wq; atomic_t throughput_override; u8 flags; }; /** * struct batadv_hard_iface - network device known to batman-adv * @list: list node for batadv_hardif_list * @if_num: identificator of the interface * @if_status: status of the interface for batman-adv * @net_dev: pointer to the net_device * @num_bcasts: number of payload re-broadcasts on this interface (ARQ) * @hardif_obj: kobject of the per interface sysfs "mesh" directory * @refcount: number of contexts the object is used * @batman_adv_ptype: packet type describing packets that should be processed by * batman-adv for this interface * @soft_iface: the batman-adv interface which uses this network interface * @rcu: struct used for freeing in an RCU-safe manner * @bat_iv: per hard-interface B.A.T.M.A.N. IV data * @bat_v: per hard-interface B.A.T.M.A.N. V data * @debug_dir: dentry for nc subdir in batman-adv directory in debugfs * @neigh_list: list of unique single hop neighbors via this interface * @neigh_list_lock: lock protecting neigh_list */ struct batadv_hard_iface { struct list_head list; s16 if_num; char if_status; struct net_device *net_dev; u8 num_bcasts; struct kobject *hardif_obj; struct kref refcount; struct packet_type batman_adv_ptype; struct net_device *soft_iface; struct rcu_head rcu; struct batadv_hard_iface_bat_iv bat_iv; #ifdef CONFIG_BATMAN_ADV_BATMAN_V struct batadv_hard_iface_bat_v bat_v; #endif struct dentry *debug_dir; struct hlist_head neigh_list; /* neigh_list_lock protects: neigh_list */ spinlock_t neigh_list_lock; }; /** * struct batadv_orig_ifinfo - originator info per outgoing interface * @list: list node for orig_node::ifinfo_list * @if_outgoing: pointer to outgoing hard-interface * @router: router that should be used to reach this originator * @last_real_seqno: last and best known sequence number * @last_ttl: ttl of last received packet * @last_seqno_forwarded: seqno of the OGM which was forwarded last * @batman_seqno_reset: time when the batman seqno window was reset * @refcount: number of contexts the object is used * @rcu: struct used for freeing in an RCU-safe manner */ struct batadv_orig_ifinfo { struct hlist_node list; struct batadv_hard_iface *if_outgoing; struct batadv_neigh_node __rcu *router; /* rcu protected pointer */ u32 last_real_seqno; u8 last_ttl; u32 last_seqno_forwarded; unsigned long batman_seqno_reset; struct kref refcount; struct rcu_head rcu; }; /** * struct batadv_frag_table_entry - head in the fragment buffer table * @fragment_list: head of list with fragments * @lock: lock to protect the list of fragments * @timestamp: time (jiffie) of last received fragment * @seqno: sequence number of the fragments in the list * @size: accumulated size of packets in list * @total_size: expected size of the assembled packet */ struct batadv_frag_table_entry { struct hlist_head fragment_list; spinlock_t lock; /* protects fragment_list */ unsigned long timestamp; u16 seqno; u16 size; u16 total_size; }; /** * struct batadv_frag_list_entry - entry in a list of fragments * @list: list node information * @skb: fragment * @no: fragment number in the set */ struct batadv_frag_list_entry { struct hlist_node list; struct sk_buff *skb; u8 no; }; /** * struct batadv_vlan_tt - VLAN specific TT attributes * @crc: CRC32 checksum of the entries belonging to this vlan * @num_entries: number of TT entries for this VLAN */ struct batadv_vlan_tt { u32 crc; atomic_t num_entries; }; /** * struct batadv_orig_node_vlan - VLAN specific data per orig_node * @vid: the VLAN identifier * @tt: VLAN specific TT attributes * @list: list node for orig_node::vlan_list * @refcount: number of context where this object is currently in use * @rcu: struct used for freeing in a RCU-safe manner */ struct batadv_orig_node_vlan { unsigned short vid; struct batadv_vlan_tt tt; struct hlist_node list; struct kref refcount; struct rcu_head rcu; }; /** * struct batadv_orig_bat_iv - B.A.T.M.A.N. IV private orig_node members * @bcast_own: set of bitfields (one per hard-interface) where each one counts * the number of our OGMs this orig_node rebroadcasted "back" to us (relative * to last_real_seqno). Every bitfield is BATADV_TQ_LOCAL_WINDOW_SIZE bits long. * @bcast_own_sum: sum of bcast_own * @ogm_cnt_lock: lock protecting bcast_own, bcast_own_sum, * neigh_node->bat_iv.real_bits & neigh_node->bat_iv.real_packet_count */ struct batadv_orig_bat_iv { unsigned long *bcast_own; u8 *bcast_own_sum; /* ogm_cnt_lock protects: bcast_own, bcast_own_sum, * neigh_node->bat_iv.real_bits & neigh_node->bat_iv.real_packet_count */ spinlock_t ogm_cnt_lock; }; /** * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh * @orig: originator ethernet address * @ifinfo_list: list for routers per outgoing interface * @last_bonding_candidate: pointer to last ifinfo of last used router * @dat_addr: address of the orig node in the distributed hash * @last_seen: time when last packet from this node was received * @bcast_seqno_reset: time when the broadcast seqno window was reset * @mcast_handler_lock: synchronizes mcast-capability and -flag changes * @mcast_flags: multicast flags announced by the orig node * @mcast_want_all_unsnoopables_node: a list node for the * mcast.want_all_unsnoopables list * @mcast_want_all_ipv4_node: a list node for the mcast.want_all_ipv4 list * @mcast_want_all_ipv6_node: a list node for the mcast.want_all_ipv6 list * @capabilities: announced capabilities of this originator * @capa_initialized: bitfield to remember whether a capability was initialized * @last_ttvn: last seen translation table version number * @tt_buff: last tt changeset this node received from the orig node * @tt_buff_len: length of the last tt changeset this node received from the * orig node * @tt_buff_lock: lock that protects tt_buff and tt_buff_len * @tt_lock: prevents from updating the table while reading it. Table update is * made up by two operations (data structure update and metdata -CRC/TTVN- * recalculation) and they have to be executed atomically in order to avoid * another thread to read the table/metadata between those. * @bcast_bits: bitfield containing the info which payload broadcast originated * from this orig node this host already has seen (relative to * last_bcast_seqno) * @last_bcast_seqno: last broadcast sequence number received by this host * @neigh_list: list of potential next hop neighbor towards this orig node * @neigh_list_lock: lock protecting neigh_list and router * @hash_entry: hlist node for batadv_priv::orig_hash * @bat_priv: pointer to soft_iface this orig node belongs to * @bcast_seqno_lock: lock protecting bcast_bits & last_bcast_seqno * @refcount: number of contexts the object is used * @rcu: struct used for freeing in an RCU-safe manner * @in_coding_list: list of nodes this orig can hear * @out_coding_list: list of nodes that can hear this orig * @in_coding_list_lock: protects in_coding_list * @out_coding_list_lock: protects out_coding_list * @fragments: array with heads for fragment chains * @vlan_list: a list of orig_node_vlan structs, one per VLAN served by the * originator represented by this object * @vlan_list_lock: lock protecting vlan_list * @bat_iv: B.A.T.M.A.N. IV private structure */ struct batadv_orig_node { u8 orig[ETH_ALEN]; struct hlist_head ifinfo_list; struct batadv_orig_ifinfo *last_bonding_candidate; #ifdef CONFIG_BATMAN_ADV_DAT batadv_dat_addr_t dat_addr; #endif unsigned long last_seen; unsigned long bcast_seqno_reset; #ifdef CONFIG_BATMAN_ADV_MCAST /* synchronizes mcast tvlv specific orig changes */ spinlock_t mcast_handler_lock; u8 mcast_flags; struct hlist_node mcast_want_all_unsnoopables_node; struct hlist_node mcast_want_all_ipv4_node; struct hlist_node mcast_want_all_ipv6_node; #endif unsigned long capabilities; unsigned long capa_initialized; atomic_t last_ttvn; unsigned char *tt_buff; s16 tt_buff_len; spinlock_t tt_buff_lock; /* protects tt_buff & tt_buff_len */ /* prevents from changing the table while reading it */ spinlock_t tt_lock; DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE); u32 last_bcast_seqno; struct hlist_head neigh_list; /* neigh_list_lock protects: neigh_list, ifinfo_list, * last_bonding_candidate and router */ spinlock_t neigh_list_lock; struct hlist_node hash_entry; struct batadv_priv *bat_priv; /* bcast_seqno_lock protects: bcast_bits & last_bcast_seqno */ spinlock_t bcast_seqno_lock; struct kref refcount; struct rcu_head rcu; #ifdef CONFIG_BATMAN_ADV_NC struct list_head in_coding_list; struct list_head out_coding_list; spinlock_t in_coding_list_lock; /* Protects in_coding_list */ spinlock_t out_coding_list_lock; /* Protects out_coding_list */ #endif struct batadv_frag_table_entry fragments[BATADV_FRAG_BUFFER_COUNT]; struct hlist_head vlan_list; spinlock_t vlan_list_lock; /* protects vlan_list */ struct batadv_orig_bat_iv bat_iv; }; /** * enum batadv_orig_capabilities - orig node capabilities * @BATADV_ORIG_CAPA_HAS_DAT: orig node has distributed arp table enabled * @BATADV_ORIG_CAPA_HAS_NC: orig node has network coding enabled * @BATADV_ORIG_CAPA_HAS_TT: orig node has tt capability * @BATADV_ORIG_CAPA_HAS_MCAST: orig node has some multicast capability * (= orig node announces a tvlv of type BATADV_TVLV_MCAST) */ enum batadv_orig_capabilities { BATADV_ORIG_CAPA_HAS_DAT, BATADV_ORIG_CAPA_HAS_NC, BATADV_ORIG_CAPA_HAS_TT, BATADV_ORIG_CAPA_HAS_MCAST, }; /** * struct batadv_gw_node - structure for orig nodes announcing gw capabilities * @list: list node for batadv_priv_gw::list * @orig_node: pointer to corresponding orig node * @bandwidth_down: advertised uplink download bandwidth * @bandwidth_up: advertised uplink upload bandwidth * @refcount: number of contexts the object is used * @rcu: struct used for freeing in an RCU-safe manner */ struct batadv_gw_node { struct hlist_node list; struct batadv_orig_node *orig_node; u32 bandwidth_down; u32 bandwidth_up; struct kref refcount; struct rcu_head rcu; }; DECLARE_EWMA(throughput, 1024, 8) /** * struct batadv_hardif_neigh_node_bat_v - B.A.T.M.A.N. V private neighbor * information * @throughput: ewma link throughput towards this neighbor * @elp_interval: time interval between two ELP transmissions * @elp_latest_seqno: latest and best known ELP sequence number * @last_unicast_tx: when the last unicast packet has been sent to this neighbor * @metric_work: work queue callback item for metric update */ struct batadv_hardif_neigh_node_bat_v { struct ewma_throughput throughput; u32 elp_interval; u32 elp_latest_seqno; unsigned long last_unicast_tx; struct work_struct metric_work; }; /** * struct batadv_hardif_neigh_node - unique neighbor per hard-interface * @list: list node for batadv_hard_iface::neigh_list * @addr: the MAC address of the neighboring interface * @if_incoming: pointer to incoming hard-interface * @last_seen: when last packet via this neighbor was received * @bat_v: B.A.T.M.A.N. V private data * @refcount: number of contexts the object is used * @rcu: struct used for freeing in a RCU-safe manner */ struct batadv_hardif_neigh_node { struct hlist_node list; u8 addr[ETH_ALEN]; struct batadv_hard_iface *if_incoming; unsigned long last_seen; #ifdef CONFIG_BATMAN_ADV_BATMAN_V struct batadv_hardif_neigh_node_bat_v bat_v; #endif struct kref refcount; struct rcu_head rcu; }; /** * struct batadv_neigh_node - structure for single hops neighbors * @list: list node for batadv_orig_node::neigh_list * @orig_node: pointer to corresponding orig_node * @addr: the MAC address of the neighboring interface * @ifinfo_list: list for routing metrics per outgoing interface * @ifinfo_lock: lock protecting private ifinfo members and list * @if_incoming: pointer to incoming hard-interface * @last_seen: when last packet via this neighbor was received * @hardif_neigh: hardif_neigh of this neighbor * @refcount: number of contexts the object is used * @rcu: struct used for freeing in an RCU-safe manner */ struct batadv_neigh_node { struct hlist_node list; struct batadv_orig_node *orig_node; u8 addr[ETH_ALEN]; struct hlist_head ifinfo_list; spinlock_t ifinfo_lock; /* protects ifinfo_list and its members */ struct batadv_hard_iface *if_incoming; unsigned long last_seen; struct batadv_hardif_neigh_node *hardif_neigh; struct kref refcount; struct rcu_head rcu; }; /** * struct batadv_neigh_ifinfo_bat_iv - neighbor information per outgoing * interface for B.A.T.M.A.N. IV * @tq_recv: ring buffer of received TQ values from this neigh node * @tq_index: ring buffer index * @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv) * @real_bits: bitfield containing the number of OGMs received from this neigh * node (relative to orig_node->last_real_seqno) * @real_packet_count: counted result of real_bits */ struct batadv_neigh_ifinfo_bat_iv { u8 tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE]; u8 tq_index; u8 tq_avg; DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE); u8 real_packet_count; }; /** * struct batadv_neigh_ifinfo_bat_v - neighbor information per outgoing * interface for B.A.T.M.A.N. V * @throughput: last throughput metric received from originator via this neigh * @last_seqno: last sequence number known for this neighbor */ struct batadv_neigh_ifinfo_bat_v { u32 throughput; u32 last_seqno; }; /** * struct batadv_neigh_ifinfo - neighbor information per outgoing interface * @list: list node for batadv_neigh_node::ifinfo_list * @if_outgoing: pointer to outgoing hard-interface * @bat_iv: B.A.T.M.A.N. IV private structure * @bat_v: B.A.T.M.A.N. V private data * @last_ttl: last received ttl from this neigh node * @refcount: number of contexts the object is used * @rcu: struct used for freeing in a RCU-safe manner */ struct batadv_neigh_ifinfo { struct hlist_node list; struct batadv_hard_iface *if_outgoing; struct batadv_neigh_ifinfo_bat_iv bat_iv; #ifdef CONFIG_BATMAN_ADV_BATMAN_V struct batadv_neigh_ifinfo_bat_v bat_v; #endif u8 last_ttl; struct kref refcount; struct rcu_head rcu; }; #ifdef CONFIG_BATMAN_ADV_BLA /** * struct batadv_bcast_duplist_entry - structure for LAN broadcast suppression * @orig: mac address of orig node orginating the broadcast * @crc: crc32 checksum of broadcast payload * @entrytime: time when the broadcast packet was received */ struct batadv_bcast_duplist_entry { u8 orig[ETH_ALEN]; __be32 crc; unsigned long entrytime; }; #endif /** * enum batadv_counters - indices for traffic counters * @BATADV_CNT_TX: transmitted payload traffic packet counter * @BATADV_CNT_TX_BYTES: transmitted payload traffic bytes counter * @BATADV_CNT_TX_DROPPED: dropped transmission payload traffic packet counter * @BATADV_CNT_RX: received payload traffic packet counter * @BATADV_CNT_RX_BYTES: received payload traffic bytes counter * @BATADV_CNT_FORWARD: forwarded payload traffic packet counter * @BATADV_CNT_FORWARD_BYTES: forwarded payload traffic bytes counter * @BATADV_CNT_MGMT_TX: transmitted routing protocol traffic packet counter * @BATADV_CNT_MGMT_TX_BYTES: transmitted routing protocol traffic bytes counter * @BATADV_CNT_MGMT_RX: received routing protocol traffic packet counter * @BATADV_CNT_MGMT_RX_BYTES: received routing protocol traffic bytes counter * @BATADV_CNT_FRAG_TX: transmitted fragment traffic packet counter * @BATADV_CNT_FRAG_TX_BYTES: transmitted fragment traffic bytes counter * @BATADV_CNT_FRAG_RX: received fragment traffic packet counter * @BATADV_CNT_FRAG_RX_BYTES: received fragment traffic bytes counter * @BATADV_CNT_FRAG_FWD: forwarded fragment traffic packet counter * @BATADV_CNT_FRAG_FWD_BYTES: forwarded fragment traffic bytes counter * @BATADV_CNT_TT_REQUEST_TX: transmitted tt req traffic packet counter * @BATADV_CNT_TT_REQUEST_RX: received tt req traffic packet counter * @BATADV_CNT_TT_RESPONSE_TX: transmitted tt resp traffic packet counter * @BATADV_CNT_TT_RESPONSE_RX: received tt resp traffic packet counter * @BATADV_CNT_TT_ROAM_ADV_TX: transmitted tt roam traffic packet counter * @BATADV_CNT_TT_ROAM_ADV_RX: received tt roam traffic packet counter * @BATADV_CNT_DAT_GET_TX: transmitted dht GET traffic packet counter * @BATADV_CNT_DAT_GET_RX: received dht GET traffic packet counter * @BATADV_CNT_DAT_PUT_TX: transmitted dht PUT traffic packet counter * @BATADV_CNT_DAT_PUT_RX: received dht PUT traffic packet counter * @BATADV_CNT_DAT_CACHED_REPLY_TX: transmitted dat cache reply traffic packet * counter * @BATADV_CNT_NC_CODE: transmitted nc-combined traffic packet counter * @BATADV_CNT_NC_CODE_BYTES: transmitted nc-combined traffic bytes counter * @BATADV_CNT_NC_RECODE: transmitted nc-recombined traffic packet counter * @BATADV_CNT_NC_RECODE_BYTES: transmitted nc-recombined traffic bytes counter * @BATADV_CNT_NC_BUFFER: counter for packets buffered for later nc decoding * @BATADV_CNT_NC_DECODE: received and nc-decoded traffic packet counter * @BATADV_CNT_NC_DECODE_BYTES: received and nc-decoded traffic bytes counter * @BATADV_CNT_NC_DECODE_FAILED: received and decode-failed traffic packet * counter * @BATADV_CNT_NC_SNIFFED: counter for nc-decoded packets received in promisc * mode. * @BATADV_CNT_NUM: number of traffic counters */ enum batadv_counters { BATADV_CNT_TX, BATADV_CNT_TX_BYTES, BATADV_CNT_TX_DROPPED, BATADV_CNT_RX, BATADV_CNT_RX_BYTES, BATADV_CNT_FORWARD, BATADV_CNT_FORWARD_BYTES, BATADV_CNT_MGMT_TX, BATADV_CNT_MGMT_TX_BYTES, BATADV_CNT_MGMT_RX, BATADV_CNT_MGMT_RX_BYTES, BATADV_CNT_FRAG_TX, BATADV_CNT_FRAG_TX_BYTES, BATADV_CNT_FRAG_RX, BATADV_CNT_FRAG_RX_BYTES, BATADV_CNT_FRAG_FWD, BATADV_CNT_FRAG_FWD_BYTES, BATADV_CNT_TT_REQUEST_TX, BATADV_CNT_TT_REQUEST_RX, BATADV_CNT_TT_RESPONSE_TX, BATADV_CNT_TT_RESPONSE_RX, BATADV_CNT_TT_ROAM_ADV_TX, BATADV_CNT_TT_ROAM_ADV_RX, #ifdef CONFIG_BATMAN_ADV_DAT BATADV_CNT_DAT_GET_TX, BATADV_CNT_DAT_GET_RX, BATADV_CNT_DAT_PUT_TX, BATADV_CNT_DAT_PUT_RX, BATADV_CNT_DAT_CACHED_REPLY_TX, #endif #ifdef CONFIG_BATMAN_ADV_NC BATADV_CNT_NC_CODE, BATADV_CNT_NC_CODE_BYTES, BATADV_CNT_NC_RECODE, BATADV_CNT_NC_RECODE_BYTES, BATADV_CNT_NC_BUFFER, BATADV_CNT_NC_DECODE, BATADV_CNT_NC_DECODE_BYTES, BATADV_CNT_NC_DECODE_FAILED, BATADV_CNT_NC_SNIFFED, #endif BATADV_CNT_NUM, }; /** * struct batadv_priv_tt - per mesh interface translation table data * @vn: translation table version number * @ogm_append_cnt: counter of number of OGMs containing the local tt diff * @local_changes: changes registered in an originator interval * @changes_list: tracks tt local changes within an originator interval * @local_hash: local translation table hash table * @global_hash: global translation table hash table * @req_list: list of pending & unanswered tt_requests * @roam_list: list of the last roaming events of each client limiting the * number of roaming events to avoid route flapping * @changes_list_lock: lock protecting changes_list * @req_list_lock: lock protecting req_list * @roam_list_lock: lock protecting roam_list * @last_changeset: last tt changeset this host has generated * @last_changeset_len: length of last tt changeset this host has generated * @last_changeset_lock: lock protecting last_changeset & last_changeset_len * @commit_lock: prevents from executing a local TT commit while reading the * local table. The local TT commit is made up by two operations (data * structure update and metdata -CRC/TTVN- recalculation) and they have to be * executed atomically in order to avoid another thread to read the * table/metadata between those. * @work: work queue callback item for translation table purging */ struct batadv_priv_tt { atomic_t vn; atomic_t ogm_append_cnt; atomic_t local_changes; struct list_head changes_list; struct batadv_hashtable *local_hash; struct batadv_hashtable *global_hash; struct hlist_head req_list; struct list_head roam_list; spinlock_t changes_list_lock; /* protects changes */ spinlock_t req_list_lock; /* protects req_list */ spinlock_t roam_list_lock; /* protects roam_list */ unsigned char *last_changeset; s16 last_changeset_len; /* protects last_changeset & last_changeset_len */ spinlock_t last_changeset_lock; /* prevents from executing a commit while reading the table */ spinlock_t commit_lock; struct delayed_work work; }; #ifdef CONFIG_BATMAN_ADV_BLA /** * struct batadv_priv_bla - per mesh interface bridge loope avoidance data * @num_requests: number of bla requests in flight * @claim_hash: hash table containing mesh nodes this host has claimed * @backbone_hash: hash table containing all detected backbone gateways * @loopdetect_addr: MAC address used for own loopdetection frames * @loopdetect_lasttime: time when the loopdetection frames were sent * @loopdetect_next: how many periods to wait for the next loopdetect process * @bcast_duplist: recently received broadcast packets array (for broadcast * duplicate suppression) * @bcast_duplist_curr: index of last broadcast packet added to bcast_duplist * @bcast_duplist_lock: lock protecting bcast_duplist & bcast_duplist_curr * @claim_dest: local claim data (e.g. claim group) * @work: work queue callback item for cleanups & bla announcements */ struct batadv_priv_bla { atomic_t num_requests; struct batadv_hashtable *claim_hash; struct batadv_hashtable *backbone_hash; u8 loopdetect_addr[ETH_ALEN]; unsigned long loopdetect_lasttime; atomic_t loopdetect_next; struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE]; int bcast_duplist_curr; /* protects bcast_duplist & bcast_duplist_curr */ spinlock_t bcast_duplist_lock; struct batadv_bla_claim_dst claim_dest; struct delayed_work work; }; #endif #ifdef CONFIG_BATMAN_ADV_DEBUG /** * struct batadv_priv_debug_log - debug logging data * @log_buff: buffer holding the logs (ring bufer) * @log_start: index of next character to read * @log_end: index of next character to write * @lock: lock protecting log_buff, log_start & log_end * @queue_wait: log reader's wait queue */ struct batadv_priv_debug_log { char log_buff[BATADV_LOG_BUF_LEN]; unsigned long log_start; unsigned long log_end; spinlock_t lock; /* protects log_buff, log_start and log_end */ wait_queue_head_t queue_wait; }; #endif /** * struct batadv_priv_gw - per mesh interface gateway data * @gateway_list: list of available gateway nodes * @list_lock: lock protecting gateway_list & curr_gw * @curr_gw: pointer to currently selected gateway node * @mode: gateway operation: off, client or server (see batadv_gw_modes) * @sel_class: gateway selection class (applies if gw_mode client) * @bandwidth_down: advertised uplink download bandwidth (if gw_mode server) * @bandwidth_up: advertised uplink upload bandwidth (if gw_mode server) * @reselect: bool indicating a gateway re-selection is in progress */ struct batadv_priv_gw { struct hlist_head gateway_list; spinlock_t list_lock; /* protects gateway_list & curr_gw */ struct batadv_gw_node __rcu *curr_gw; /* rcu protected pointer */ atomic_t mode; atomic_t sel_class; atomic_t bandwidth_down; atomic_t bandwidth_up; atomic_t reselect; }; /** * struct batadv_priv_tvlv - per mesh interface tvlv data * @container_list: list of registered tvlv containers to be sent with each OGM * @handler_list: list of the various tvlv content handlers * @container_list_lock: protects tvlv container list access * @handler_list_lock: protects handler list access */ struct batadv_priv_tvlv { struct hlist_head container_list; struct hlist_head handler_list; spinlock_t container_list_lock; /* protects container_list */ spinlock_t handler_list_lock; /* protects handler_list */ }; #ifdef CONFIG_BATMAN_ADV_DAT /** * struct batadv_priv_dat - per mesh interface DAT private data * @addr: node DAT address * @hash: hashtable representing the local ARP cache * @work: work queue callback item for cache purging */ struct batadv_priv_dat { batadv_dat_addr_t addr; struct batadv_hashtable *hash; struct delayed_work work; }; #endif #ifdef CONFIG_BATMAN_ADV_MCAST /** * struct batadv_mcast_querier_state - IGMP/MLD querier state when bridged * @exists: whether a querier exists in the mesh * @shadowing: if a querier exists, whether it is potentially shadowing * multicast listeners (i.e. querier is behind our own bridge segment) */ struct batadv_mcast_querier_state { bool exists; bool shadowing; }; /** * struct batadv_priv_mcast - per mesh interface mcast data * @mla_list: list of multicast addresses we are currently announcing via TT * @want_all_unsnoopables_list: a list of orig_nodes wanting all unsnoopable * multicast traffic * @want_all_ipv4_list: a list of orig_nodes wanting all IPv4 multicast traffic * @want_all_ipv6_list: a list of orig_nodes wanting all IPv6 multicast traffic * @querier_ipv4: the current state of an IGMP querier in the mesh * @querier_ipv6: the current state of an MLD querier in the mesh * @flags: the flags we have last sent in our mcast tvlv * @enabled: whether the multicast tvlv is currently enabled * @bridged: whether the soft interface has a bridge on top * @num_disabled: number of nodes that have no mcast tvlv * @num_want_all_unsnoopables: number of nodes wanting unsnoopable IP traffic * @num_want_all_ipv4: counter for items in want_all_ipv4_list * @num_want_all_ipv6: counter for items in want_all_ipv6_list * @want_lists_lock: lock for protecting modifications to mcast want lists * (traversals are rcu-locked) */ struct batadv_priv_mcast { struct hlist_head mla_list; struct hlist_head want_all_unsnoopables_list; struct hlist_head want_all_ipv4_list; struct hlist_head want_all_ipv6_list; struct batadv_mcast_querier_state querier_ipv4; struct batadv_mcast_querier_state querier_ipv6; u8 flags; bool enabled; bool bridged; atomic_t num_disabled; atomic_t num_want_all_unsnoopables; atomic_t num_want_all_ipv4; atomic_t num_want_all_ipv6; /* protects want_all_{unsnoopables,ipv4,ipv6}_list */ spinlock_t want_lists_lock; }; #endif /** * struct batadv_priv_nc - per mesh interface network coding private data * @work: work queue callback item for cleanup * @debug_dir: dentry for nc subdir in batman-adv directory in debugfs * @min_tq: only consider neighbors for encoding if neigh_tq > min_tq * @max_fwd_delay: maximum packet forward delay to allow coding of packets * @max_buffer_time: buffer time for sniffed packets used to decoding * @timestamp_fwd_flush: timestamp of last forward packet queue flush * @timestamp_sniffed_purge: timestamp of last sniffed packet queue purge * @coding_hash: Hash table used to buffer skbs while waiting for another * incoming skb to code it with. Skbs are added to the buffer just before being * forwarded in routing.c * @decoding_hash: Hash table used to buffer skbs that might be needed to decode * a received coded skb. The buffer is used for 1) skbs arriving on the * soft-interface; 2) skbs overheard on the hard-interface; and 3) skbs * forwarded by batman-adv. */ struct batadv_priv_nc { struct delayed_work work; struct dentry *debug_dir; u8 min_tq; u32 max_fwd_delay; u32 max_buffer_time; unsigned long timestamp_fwd_flush; unsigned long timestamp_sniffed_purge; struct batadv_hashtable *coding_hash; struct batadv_hashtable *decoding_hash; }; /** * struct batadv_tp_unacked - unacked packet meta-information * @seqno: seqno of the unacked packet * @len: length of the packet * @list: list node for batadv_tp_vars::unacked_list * * This struct is supposed to represent a buffer unacked packet. However, since * the purpose of the TP meter is to count the traffic only, there is no need to * store the entire sk_buff, the starting offset and the length are enough */ struct batadv_tp_unacked { u32 seqno; u16 len; struct list_head list; }; /** * enum batadv_tp_meter_role - Modus in tp meter session * @BATADV_TP_RECEIVER: Initialized as receiver * @BATADV_TP_SENDER: Initialized as sender */ enum batadv_tp_meter_role { BATADV_TP_RECEIVER, BATADV_TP_SENDER }; /** * struct batadv_tp_vars - tp meter private variables per session * @list: list node for bat_priv::tp_list * @timer: timer for ack (receiver) and retry (sender) * @bat_priv: pointer to the mesh object * @start_time: start time in jiffies * @other_end: mac address of remote * @role: receiver/sender modi * @sending: sending binary semaphore: 1 if sending, 0 is not * @reason: reason for a stopped session * @finish_work: work item for the finishing procedure * @test_length: test length in milliseconds * @session: TP session identifier * @icmp_uid: local ICMP "socket" index * @dec_cwnd: decimal part of the cwnd used during linear growth * @cwnd: current size of the congestion window * @cwnd_lock: lock do protect @cwnd & @dec_cwnd * @ss_threshold: Slow Start threshold. Once cwnd exceeds this value the * connection switches to the Congestion Avoidance state * @last_acked: last acked byte * @last_sent: last sent byte, not yet acked * @tot_sent: amount of data sent/ACKed so far * @dup_acks: duplicate ACKs counter * @fast_recovery: true if in Fast Recovery mode * @recover: last sent seqno when entering Fast Recovery * @rto: sender timeout * @srtt: smoothed RTT scaled by 2^3 * @rttvar: RTT variation scaled by 2^2 * @more_bytes: waiting queue anchor when waiting for more ack/retry timeout * @prerandom_offset: offset inside the prerandom buffer * @prerandom_lock: spinlock protecting access to prerandom_offset * @last_recv: last in-order received packet * @unacked_list: list of unacked packets (meta-info only) * @unacked_lock: protect unacked_list * @last_recv_time: time time (jiffies) a msg was received * @refcount: number of context where the object is used * @rcu: struct used for freeing in an RCU-safe manner */ struct batadv_tp_vars { struct hlist_node list; struct timer_list timer; struct batadv_priv *bat_priv; unsigned long start_time; u8 other_end[ETH_ALEN]; enum batadv_tp_meter_role role; atomic_t sending; enum batadv_tp_meter_reason reason; struct delayed_work finish_work; u32 test_length; u8 session[2]; u8 icmp_uid; /* sender variables */ u16 dec_cwnd; u32 cwnd; spinlock_t cwnd_lock; /* Protects cwnd & dec_cwnd */ u32 ss_threshold; atomic_t last_acked; u32 last_sent; atomic64_t tot_sent; atomic_t dup_acks; bool fast_recovery; u32 recover; u32 rto; u32 srtt; u32 rttvar; wait_queue_head_t more_bytes; u32 prerandom_offset; spinlock_t prerandom_lock; /* Protects prerandom_offset */ /* receiver variables */ u32 last_recv; struct list_head unacked_list; spinlock_t unacked_lock; /* Protects unacked_list */ unsigned long last_recv_time; struct kref refcount; struct rcu_head rcu; }; /** * struct batadv_softif_vlan - per VLAN attributes set * @bat_priv: pointer to the mesh object * @vid: VLAN identifier * @kobj: kobject for sysfs vlan subdirectory * @ap_isolation: AP isolation state * @tt: TT private attributes (VLAN specific) * @list: list node for bat_priv::softif_vlan_list * @refcount: number of context where this object is currently in use * @rcu: struct used for freeing in a RCU-safe manner */ struct batadv_softif_vlan { struct batadv_priv *bat_priv; unsigned short vid; struct kobject *kobj; atomic_t ap_isolation; /* boolean */ struct batadv_vlan_tt tt; struct hlist_node list; struct kref refcount; struct rcu_head rcu; }; /** * struct batadv_priv_bat_v - B.A.T.M.A.N. V per soft-interface private data * @ogm_buff: buffer holding the OGM packet * @ogm_buff_len: length of the OGM packet buffer * @ogm_seqno: OGM sequence number - used to identify each OGM * @ogm_wq: workqueue used to schedule OGM transmissions */ struct batadv_priv_bat_v { unsigned char *ogm_buff; int ogm_buff_len; atomic_t ogm_seqno; struct delayed_work ogm_wq; }; /** * struct batadv_priv - per mesh interface data * @mesh_state: current status of the mesh (inactive/active/deactivating) * @soft_iface: net device which holds this struct as private data * @stats: structure holding the data for the ndo_get_stats() call * @bat_counters: mesh internal traffic statistic counters (see batadv_counters) * @aggregated_ogms: bool indicating whether OGM aggregation is enabled * @bonding: bool indicating whether traffic bonding is enabled * @fragmentation: bool indicating whether traffic fragmentation is enabled * @packet_size_max: max packet size that can be transmitted via * multiple fragmented skbs or a single frame if fragmentation is disabled * @frag_seqno: incremental counter to identify chains of egress fragments * @bridge_loop_avoidance: bool indicating whether bridge loop avoidance is * enabled * @distributed_arp_table: bool indicating whether distributed ARP table is * enabled * @multicast_mode: Enable or disable multicast optimizations on this node's * sender/originating side * @orig_interval: OGM broadcast interval in milliseconds * @hop_penalty: penalty which will be applied to an OGM's tq-field on every hop * @log_level: configured log level (see batadv_dbg_level) * @isolation_mark: the skb->mark value used to match packets for AP isolation * @isolation_mark_mask: bitmask identifying the bits in skb->mark to be used * for the isolation mark * @bcast_seqno: last sent broadcast packet sequence number * @bcast_queue_left: number of remaining buffered broadcast packet slots * @batman_queue_left: number of remaining OGM packet slots * @num_ifaces: number of interfaces assigned to this mesh interface * @mesh_obj: kobject for sysfs mesh subdirectory * @debug_dir: dentry for debugfs batman-adv subdirectory * @forw_bat_list: list of aggregated OGMs that will be forwarded * @forw_bcast_list: list of broadcast packets that will be rebroadcasted * @tp_list: list of tp sessions * @tp_num: number of currently active tp sessions * @orig_hash: hash table containing mesh participants (orig nodes) * @forw_bat_list_lock: lock protecting forw_bat_list * @forw_bcast_list_lock: lock protecting forw_bcast_list * @tp_list_lock: spinlock protecting @tp_list * @orig_work: work queue callback item for orig node purging * @primary_if: one of the hard-interfaces assigned to this mesh interface * becomes the primary interface * @algo_ops: routing algorithm used by this mesh interface * @softif_vlan_list: a list of softif_vlan structs, one per VLAN created on top * of the mesh interface represented by this object * @softif_vlan_list_lock: lock protecting softif_vlan_list * @bla: bridge loope avoidance data * @debug_log: holding debug logging relevant data * @gw: gateway data * @tt: translation table data * @tvlv: type-version-length-value data * @dat: distributed arp table data * @mcast: multicast data * @network_coding: bool indicating whether network coding is enabled * @nc: network coding data * @bat_v: B.A.T.M.A.N. V per soft-interface private data */ struct batadv_priv { atomic_t mesh_state; struct net_device *soft_iface; struct net_device_stats stats; u64 __percpu *bat_counters; /* Per cpu counters */ atomic_t aggregated_ogms; atomic_t bonding; atomic_t fragmentation; atomic_t packet_size_max; atomic_t frag_seqno; #ifdef CONFIG_BATMAN_ADV_BLA atomic_t bridge_loop_avoidance; #endif #ifdef CONFIG_BATMAN_ADV_DAT atomic_t distributed_arp_table; #endif #ifdef CONFIG_BATMAN_ADV_MCAST atomic_t multicast_mode; #endif atomic_t orig_interval; atomic_t hop_penalty; #ifdef CONFIG_BATMAN_ADV_DEBUG atomic_t log_level; #endif u32 isolation_mark; u32 isolation_mark_mask; atomic_t bcast_seqno; atomic_t bcast_queue_left; atomic_t batman_queue_left; char num_ifaces; struct kobject *mesh_obj; struct dentry *debug_dir; struct hlist_head forw_bat_list; struct hlist_head forw_bcast_list; struct hlist_head tp_list; struct batadv_hashtable *orig_hash; spinlock_t forw_bat_list_lock; /* protects forw_bat_list */ spinlock_t forw_bcast_list_lock; /* protects forw_bcast_list */ spinlock_t tp_list_lock; /* protects tp_list */ atomic_t tp_num; struct delayed_work orig_work; struct batadv_hard_iface __rcu *primary_if; /* rcu protected pointer */ struct batadv_algo_ops *algo_ops; struct hlist_head softif_vlan_list; spinlock_t softif_vlan_list_lock; /* protects softif_vlan_list */ #ifdef CONFIG_BATMAN_ADV_BLA struct batadv_priv_bla bla; #endif #ifdef CONFIG_BATMAN_ADV_DEBUG struct batadv_priv_debug_log *debug_log; #endif struct batadv_priv_gw gw; struct batadv_priv_tt tt; struct batadv_priv_tvlv tvlv; #ifdef CONFIG_BATMAN_ADV_DAT struct batadv_priv_dat dat; #endif #ifdef CONFIG_BATMAN_ADV_MCAST struct batadv_priv_mcast mcast; #endif #ifdef CONFIG_BATMAN_ADV_NC atomic_t network_coding; struct batadv_priv_nc nc; #endif /* CONFIG_BATMAN_ADV_NC */ #ifdef CONFIG_BATMAN_ADV_BATMAN_V struct batadv_priv_bat_v bat_v; #endif }; /** * struct batadv_socket_client - layer2 icmp socket client data * @queue_list: packet queue for packets destined for this socket client * @queue_len: number of packets in the packet queue (queue_list) * @index: socket client's index in the batadv_socket_client_hash * @lock: lock protecting queue_list, queue_len & index * @queue_wait: socket client's wait queue * @bat_priv: pointer to soft_iface this client belongs to */ struct batadv_socket_client { struct list_head queue_list; unsigned int queue_len; unsigned char index; spinlock_t lock; /* protects queue_list, queue_len & index */ wait_queue_head_t queue_wait; struct batadv_priv *bat_priv; }; /** * struct batadv_socket_packet - layer2 icmp packet for socket client * @list: list node for batadv_socket_client::queue_list * @icmp_len: size of the layer2 icmp packet * @icmp_packet: layer2 icmp packet */ struct batadv_socket_packet { struct list_head list; size_t icmp_len; u8 icmp_packet[BATADV_ICMP_MAX_PACKET_SIZE]; }; #ifdef CONFIG_BATMAN_ADV_BLA /** * struct batadv_bla_backbone_gw - batman-adv gateway bridged into the LAN * @orig: originator address of backbone node (mac address of primary iface) * @vid: vlan id this gateway was detected on * @hash_entry: hlist node for batadv_priv_bla::backbone_hash * @bat_priv: pointer to soft_iface this backbone gateway belongs to * @lasttime: last time we heard of this backbone gw * @wait_periods: grace time for bridge forward delays and bla group forming at * bootup phase - no bcast traffic is formwared until it has elapsed * @request_sent: if this bool is set to true we are out of sync with this * backbone gateway - no bcast traffic is formwared until the situation was * resolved * @crc: crc16 checksum over all claims * @crc_lock: lock protecting crc * @report_work: work struct for reporting detected loops * @refcount: number of contexts the object is used * @rcu: struct used for freeing in an RCU-safe manner */ struct batadv_bla_backbone_gw { u8 orig[ETH_ALEN]; unsigned short vid; struct hlist_node hash_entry; struct batadv_priv *bat_priv; unsigned long lasttime; atomic_t wait_periods; atomic_t request_sent; u16 crc; spinlock_t crc_lock; /* protects crc */ struct work_struct report_work; struct kref refcount; struct rcu_head rcu; }; /** * struct batadv_bla_claim - claimed non-mesh client structure * @addr: mac address of claimed non-mesh client * @vid: vlan id this client was detected on * @backbone_gw: pointer to backbone gw claiming this client * @backbone_lock: lock protecting backbone_gw pointer * @lasttime: last time we heard of claim (locals only) * @hash_entry: hlist node for batadv_priv_bla::claim_hash * @refcount: number of contexts the object is used * @rcu: struct used for freeing in an RCU-safe manner */ struct batadv_bla_claim { u8 addr[ETH_ALEN]; unsigned short vid; struct batadv_bla_backbone_gw *backbone_gw; spinlock_t backbone_lock; /* protects backbone_gw */ unsigned long lasttime; struct hlist_node hash_entry; struct rcu_head rcu; struct kref refcount; }; #endif /** * struct batadv_tt_common_entry - tt local & tt global common data * @addr: mac address of non-mesh client * @vid: VLAN identifier * @hash_entry: hlist node for batadv_priv_tt::local_hash or for * batadv_priv_tt::global_hash * @flags: various state handling flags (see batadv_tt_client_flags) * @added_at: timestamp used for purging stale tt common entries * @refcount: number of contexts the object is used * @rcu: struct used for freeing in an RCU-safe manner */ struct batadv_tt_common_entry { u8 addr[ETH_ALEN]; unsigned short vid; struct hlist_node hash_entry; u16 flags; unsigned long added_at; struct kref refcount; struct rcu_head rcu; }; /** * struct batadv_tt_local_entry - translation table local entry data * @common: general translation table data * @last_seen: timestamp used for purging stale tt local entries * @vlan: soft-interface vlan of the entry */ struct batadv_tt_local_entry { struct batadv_tt_common_entry common; unsigned long last_seen; struct batadv_softif_vlan *vlan; }; /** * struct batadv_tt_global_entry - translation table global entry data * @common: general translation table data * @orig_list: list of orig nodes announcing this non-mesh client * @orig_list_count: number of items in the orig_list * @list_lock: lock protecting orig_list * @roam_at: time at which TT_GLOBAL_ROAM was set */ struct batadv_tt_global_entry { struct batadv_tt_common_entry common; struct hlist_head orig_list; atomic_t orig_list_count; spinlock_t list_lock; /* protects orig_list */ unsigned long roam_at; }; /** * struct batadv_tt_orig_list_entry - orig node announcing a non-mesh client * @orig_node: pointer to orig node announcing this non-mesh client * @ttvn: translation table version number which added the non-mesh client * @list: list node for batadv_tt_global_entry::orig_list * @refcount: number of contexts the object is used * @rcu: struct used for freeing in an RCU-safe manner */ struct batadv_tt_orig_list_entry { struct batadv_orig_node *orig_node; u8 ttvn; struct hlist_node list; struct kref refcount; struct rcu_head rcu; }; /** * struct batadv_tt_change_node - structure for tt changes occurred * @list: list node for batadv_priv_tt::changes_list * @change: holds the actual translation table diff data */ struct batadv_tt_change_node { struct list_head list; struct batadv_tvlv_tt_change change; }; /** * struct batadv_tt_req_node - data to keep track of the tt requests in flight * @addr: mac address address of the originator this request was sent to * @issued_at: timestamp used for purging stale tt requests * @refcount: number of contexts the object is used by * @list: list node for batadv_priv_tt::req_list */ struct batadv_tt_req_node { u8 addr[ETH_ALEN]; unsigned long issued_at; struct kref refcount; struct hlist_node list; }; /** * struct batadv_tt_roam_node - roaming client data * @addr: mac address of the client in the roaming phase * @counter: number of allowed roaming events per client within a single * OGM interval (changes are committed with each OGM) * @first_time: timestamp used for purging stale roaming node entries * @list: list node for batadv_priv_tt::roam_list */ struct batadv_tt_roam_node { u8 addr[ETH_ALEN]; atomic_t counter; unsigned long first_time; struct list_head list; }; /** * struct batadv_nc_node - network coding node * @list: next and prev pointer for the list handling * @addr: the node's mac address * @refcount: number of contexts the object is used by * @rcu: struct used for freeing in an RCU-safe manner * @orig_node: pointer to corresponding orig node struct * @last_seen: timestamp of last ogm received from this node */ struct batadv_nc_node { struct list_head list; u8 addr[ETH_ALEN]; struct kref refcount; struct rcu_head rcu; struct batadv_orig_node *orig_node; unsigned long last_seen; }; /** * struct batadv_nc_path - network coding path * @hash_entry: next and prev pointer for the list handling * @rcu: struct used for freeing in an RCU-safe manner * @refcount: number of contexts the object is used by * @packet_list: list of buffered packets for this path * @packet_list_lock: access lock for packet list * @next_hop: next hop (destination) of path * @prev_hop: previous hop (source) of path * @last_valid: timestamp for last validation of path */ struct batadv_nc_path { struct hlist_node hash_entry; struct rcu_head rcu; struct kref refcount; struct list_head packet_list; spinlock_t packet_list_lock; /* Protects packet_list */ u8 next_hop[ETH_ALEN]; u8 prev_hop[ETH_ALEN]; unsigned long last_valid; }; /** * struct batadv_nc_packet - network coding packet used when coding and * decoding packets * @list: next and prev pointer for the list handling * @packet_id: crc32 checksum of skb data * @timestamp: field containing the info when the packet was added to path * @neigh_node: pointer to original next hop neighbor of skb * @skb: skb which can be encoded or used for decoding * @nc_path: pointer to path this nc packet is attached to */ struct batadv_nc_packet { struct list_head list; __be32 packet_id; unsigned long timestamp; struct batadv_neigh_node *neigh_node; struct sk_buff *skb; struct batadv_nc_path *nc_path; }; /** * struct batadv_skb_cb - control buffer structure used to store private data * relevant to batman-adv in the skb->cb buffer in skbs. * @decoded: Marks a skb as decoded, which is checked when searching for coding * opportunities in network-coding.c */ struct batadv_skb_cb { bool decoded; }; /** * struct batadv_forw_packet - structure for bcast packets to be sent/forwarded * @list: list node for batadv_priv::forw_{bat,bcast}_list * @send_time: execution time for delayed_work (packet sending) * @own: bool for locally generated packets (local OGMs are re-scheduled after * sending) * @skb: bcast packet's skb buffer * @packet_len: size of aggregated OGM packet inside the skb buffer * @direct_link_flags: direct link flags for aggregated OGM packets * @num_packets: counter for bcast packet retransmission * @delayed_work: work queue callback item for packet sending * @if_incoming: pointer to incoming hard-iface or primary iface if * locally generated packet * @if_outgoing: packet where the packet should be sent to, or NULL if * unspecified * @queue_left: The queue (counter) this packet was applied to */ struct batadv_forw_packet { struct hlist_node list; unsigned long send_time; u8 own; struct sk_buff *skb; u16 packet_len; u32 direct_link_flags; u8 num_packets; struct delayed_work delayed_work; struct batadv_hard_iface *if_incoming; struct batadv_hard_iface *if_outgoing; atomic_t *queue_left; }; /** * struct batadv_algo_iface_ops - mesh algorithm callbacks (interface specific) * @activate: start routing mechanisms when hard-interface is brought up * (optional) * @enable: init routing info when hard-interface is enabled * @disable: de-init routing info when hard-interface is disabled * @update_mac: (re-)init mac addresses of the protocol information * belonging to this hard-interface * @primary_set: called when primary interface is selected / changed */ struct batadv_algo_iface_ops { void (*activate)(struct batadv_hard_iface *hard_iface); int (*enable)(struct batadv_hard_iface *hard_iface); void (*disable)(struct batadv_hard_iface *hard_iface); void (*update_mac)(struct batadv_hard_iface *hard_iface); void (*primary_set)(struct batadv_hard_iface *hard_iface); }; /** * struct batadv_algo_neigh_ops - mesh algorithm callbacks (neighbour specific) * @hardif_init: called on creation of single hop entry * (optional) * @cmp: compare the metrics of two neighbors for their respective outgoing * interfaces * @is_similar_or_better: check if neigh1 is equally similar or better than * neigh2 for their respective outgoing interface from the metric prospective * @print: print the single hop neighbor list (optional) * @dump: dump neighbors to a netlink socket (optional) */ struct batadv_algo_neigh_ops { void (*hardif_init)(struct batadv_hardif_neigh_node *neigh); int (*cmp)(struct batadv_neigh_node *neigh1, struct batadv_hard_iface *if_outgoing1, struct batadv_neigh_node *neigh2, struct batadv_hard_iface *if_outgoing2); bool (*is_similar_or_better)(struct batadv_neigh_node *neigh1, struct batadv_hard_iface *if_outgoing1, struct batadv_neigh_node *neigh2, struct batadv_hard_iface *if_outgoing2); #ifdef CONFIG_BATMAN_ADV_DEBUGFS void (*print)(struct batadv_priv *priv, struct seq_file *seq); #endif void (*dump)(struct sk_buff *msg, struct netlink_callback *cb, struct batadv_priv *priv, struct batadv_hard_iface *hard_iface); }; /** * struct batadv_algo_orig_ops - mesh algorithm callbacks (originator specific) * @free: free the resources allocated by the routing algorithm for an orig_node * object (optional) * @add_if: ask the routing algorithm to apply the needed changes to the * orig_node due to a new hard-interface being added into the mesh (optional) * @del_if: ask the routing algorithm to apply the needed changes to the * orig_node due to an hard-interface being removed from the mesh (optional) * @print: print the originator table (optional) * @dump: dump originators to a netlink socket (optional) */ struct batadv_algo_orig_ops { void (*free)(struct batadv_orig_node *orig_node); int (*add_if)(struct batadv_orig_node *orig_node, int max_if_num); int (*del_if)(struct batadv_orig_node *orig_node, int max_if_num, int del_if_num); #ifdef CONFIG_BATMAN_ADV_DEBUGFS void (*print)(struct batadv_priv *priv, struct seq_file *seq, struct batadv_hard_iface *hard_iface); #endif void (*dump)(struct sk_buff *msg, struct netlink_callback *cb, struct batadv_priv *priv, struct batadv_hard_iface *hard_iface); }; /** * struct batadv_algo_gw_ops - mesh algorithm callbacks (GW specific) * @store_sel_class: parse and stores a new GW selection class (optional) * @show_sel_class: prints the current GW selection class (optional) * @get_best_gw_node: select the best GW from the list of available nodes * (optional) * @is_eligible: check if a newly discovered GW is a potential candidate for * the election as best GW (optional) * @print: print the gateway table (optional) * @dump: dump gateways to a netlink socket (optional) */ struct batadv_algo_gw_ops { ssize_t (*store_sel_class)(struct batadv_priv *bat_priv, char *buff, size_t count); ssize_t (*show_sel_class)(struct batadv_priv *bat_priv, char *buff); struct batadv_gw_node *(*get_best_gw_node) (struct batadv_priv *bat_priv); bool (*is_eligible)(struct batadv_priv *bat_priv, struct batadv_orig_node *curr_gw_orig, struct batadv_orig_node *orig_node); #ifdef CONFIG_BATMAN_ADV_DEBUGFS void (*print)(struct batadv_priv *bat_priv, struct seq_file *seq); #endif void (*dump)(struct sk_buff *msg, struct netlink_callback *cb, struct batadv_priv *priv); }; /** * struct batadv_algo_ops - mesh algorithm callbacks * @list: list node for the batadv_algo_list * @name: name of the algorithm * @iface: callbacks related to interface handling * @neigh: callbacks related to neighbors handling * @orig: callbacks related to originators handling * @gw: callbacks related to GW mode */ struct batadv_algo_ops { struct hlist_node list; char *name; struct batadv_algo_iface_ops iface; struct batadv_algo_neigh_ops neigh; struct batadv_algo_orig_ops orig; struct batadv_algo_gw_ops gw; }; /** * struct batadv_dat_entry - it is a single entry of batman-adv ARP backend. It * is used to stored ARP entries needed for the global DAT cache * @ip: the IPv4 corresponding to this DAT/ARP entry * @mac_addr: the MAC address associated to the stored IPv4 * @vid: the vlan ID associated to this entry * @last_update: time in jiffies when this entry was refreshed last time * @hash_entry: hlist node for batadv_priv_dat::hash * @refcount: number of contexts the object is used * @rcu: struct used for freeing in an RCU-safe manner */ struct batadv_dat_entry { __be32 ip; u8 mac_addr[ETH_ALEN]; unsigned short vid; unsigned long last_update; struct hlist_node hash_entry; struct kref refcount; struct rcu_head rcu; }; /** * struct batadv_hw_addr - a list entry for a MAC address * @list: list node for the linking of entries * @addr: the MAC address of this list entry */ struct batadv_hw_addr { struct hlist_node list; unsigned char addr[ETH_ALEN]; }; /** * struct batadv_dat_candidate - candidate destination for DAT operations * @type: the type of the selected candidate. It can one of the following: * - BATADV_DAT_CANDIDATE_NOT_FOUND * - BATADV_DAT_CANDIDATE_ORIG * @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to the * corresponding originator node structure */ struct batadv_dat_candidate { int type; struct batadv_orig_node *orig_node; }; /** * struct batadv_tvlv_container - container for tvlv appended to OGMs * @list: hlist node for batadv_priv_tvlv::container_list * @tvlv_hdr: tvlv header information needed to construct the tvlv * @refcount: number of contexts the object is used */ struct batadv_tvlv_container { struct hlist_node list; struct batadv_tvlv_hdr tvlv_hdr; struct kref refcount; }; /** * struct batadv_tvlv_handler - handler for specific tvlv type and version * @list: hlist node for batadv_priv_tvlv::handler_list * @ogm_handler: handler callback which is given the tvlv payload to process on * incoming OGM packets * @unicast_handler: handler callback which is given the tvlv payload to process * on incoming unicast tvlv packets * @type: tvlv type this handler feels responsible for * @version: tvlv version this handler feels responsible for * @flags: tvlv handler flags * @refcount: number of contexts the object is used * @rcu: struct used for freeing in an RCU-safe manner */ struct batadv_tvlv_handler { struct hlist_node list; void (*ogm_handler)(struct batadv_priv *bat_priv, struct batadv_orig_node *orig, u8 flags, void *tvlv_value, u16 tvlv_value_len); int (*unicast_handler)(struct batadv_priv *bat_priv, u8 *src, u8 *dst, void *tvlv_value, u16 tvlv_value_len); u8 type; u8 version; u8 flags; struct kref refcount; struct rcu_head rcu; }; /** * enum batadv_tvlv_handler_flags - tvlv handler flags definitions * @BATADV_TVLV_HANDLER_OGM_CIFNOTFND: tvlv ogm processing function will call * this handler even if its type was not found (with no data) * @BATADV_TVLV_HANDLER_OGM_CALLED: interval tvlv handling flag - the API marks * a handler as being called, so it won't be called if the * BATADV_TVLV_HANDLER_OGM_CIFNOTFND flag was set */ enum batadv_tvlv_handler_flags { BATADV_TVLV_HANDLER_OGM_CIFNOTFND = BIT(1), BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2), }; /** * struct batadv_store_mesh_work - Work queue item to detach add/del interface * from sysfs locks * @net_dev: netdevice to add/remove to/from batman-adv soft-interface * @soft_iface_name: name of soft-interface to modify * @work: work queue item */ struct batadv_store_mesh_work { struct net_device *net_dev; char soft_iface_name[IFNAMSIZ]; struct work_struct work; }; #endif /* _NET_BATMAN_ADV_TYPES_H_ */