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OpenCloudOS-Kernel/net/batman-adv/types.h

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/* Copyright (C) 2007-2014 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 <http://www.gnu.org/licenses/>.
*/
#ifndef _NET_BATMAN_ADV_TYPES_H_
#define _NET_BATMAN_ADV_TYPES_H_
#include "packet.h"
#include "bitarray.h"
#include <linux/kernel.h>
#ifdef CONFIG_BATMAN_ADV_DAT
/* batadv_dat_addr_t 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 uint16_t
#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;
};
/**
* 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: BATMAN IV specific per hard interface data
* @cleanup_work: work queue callback item for hard interface deinit
* @debug_dir: dentry for nc subdir in batman-adv directory in debugfs
*/
struct batadv_hard_iface {
struct list_head list;
int16_t if_num;
char if_status;
struct net_device *net_dev;
uint8_t num_bcasts;
struct kobject *hardif_obj;
atomic_t refcount;
struct packet_type batman_adv_ptype;
struct net_device *soft_iface;
struct rcu_head rcu;
struct batadv_hard_iface_bat_iv bat_iv;
struct work_struct cleanup_work;
struct dentry *debug_dir;
};
/**
* 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
* @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 */
uint32_t last_real_seqno;
uint8_t last_ttl;
unsigned long batman_seqno_reset;
atomic_t refcount;
struct rcu_head rcu;
};
/**
* struct batadv_frag_table_entry - head in the fragment buffer table
* @head: 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
*/
struct batadv_frag_table_entry {
struct hlist_head head;
spinlock_t lock; /* protects head */
unsigned long timestamp;
uint16_t seqno;
uint16_t 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;
uint8_t 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 {
uint32_t crc;
atomic_t num_entries;
};
/**
* 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 list_head list;
atomic_t refcount;
struct rcu_head rcu;
};
/**
* struct batadv_orig_bat_iv - B.A.T.M.A.N. IV private orig_node members
* @bcast_own: bitfield containing the number of our OGMs this orig_node
* rebroadcasted "back" to us (relative to last_real_seqno)
* @bcast_own_sum: counted result 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;
uint8_t *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
* @primary_addr: hosts primary interface address
* @ifinfo_list: list for routers per outgoing interface
* @last_bonding_candidate: pointer to last ifinfo of last used router
* @batadv_dat_addr_t: 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
* @capabilities: announced capabilities of this originator
* @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_initialised: bool keeping track of whether or not this node have received
* any translation table information from the orig node yet
* @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 {
uint8_t orig[ETH_ALEN];
uint8_t primary_addr[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;
uint8_t capabilities;
atomic_t last_ttvn;
unsigned char *tt_buff;
int16_t tt_buff_len;
spinlock_t tt_buff_lock; /* protects tt_buff & tt_buff_len */
bool tt_initialised;
/* prevents from changing the table while reading it */
spinlock_t tt_lock;
DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
uint32_t last_bcast_seqno;
struct hlist_head neigh_list;
/* neigh_list_lock protects: neigh_list 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;
atomic_t 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 list_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
*/
enum batadv_orig_capabilities {
BATADV_ORIG_CAPA_HAS_DAT = BIT(0),
BATADV_ORIG_CAPA_HAS_NC = BIT(1),
};
/**
* 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
* @deleted: this struct is scheduled for deletion
* @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;
uint32_t bandwidth_down;
uint32_t bandwidth_up;
unsigned long deleted;
atomic_t 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
* @last_ttl: last received ttl from this neigh node
* @rcu: struct used for freeing in an RCU-safe manner
* @bat_iv: B.A.T.M.A.N. IV private structure
*/
struct batadv_neigh_node {
struct hlist_node list;
struct batadv_orig_node *orig_node;
uint8_t 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;
atomic_t refcount;
struct rcu_head rcu;
};
/**
* struct batadv_neigh_node_bat_iv - neighbor information per outgoing
* interface for BATMAN 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 {
uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
uint8_t tq_index;
uint8_t tq_avg;
DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
uint8_t real_packet_count;
};
/**
* 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
* @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;
uint8_t last_ttl;
atomic_t refcount;
struct rcu_head rcu;
};
/**
* struct batadv_bcast_duplist_entry - structure for LAN broadcast suppression
* @orig[ETH_ALEN]: mac address of orig node orginating the broadcast
* @crc: crc32 checksum of broadcast payload
* @entrytime: time when the broadcast packet was received
*/
#ifdef CONFIG_BATMAN_ADV_BLA
struct batadv_bcast_duplist_entry {
uint8_t 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 list_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;
int16_t 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;
};
/**
* 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
* @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
*/
#ifdef CONFIG_BATMAN_ADV_BLA
struct batadv_priv_bla {
atomic_t num_requests;
struct batadv_hashtable *claim_hash;
struct batadv_hashtable *backbone_hash;
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
/**
* struct batadv_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
*/
#ifdef CONFIG_BATMAN_ADV_DEBUG
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
* @list: list of available gateway nodes
* @list_lock: lock protecting gw_list & curr_gw
* @curr_gw: pointer to currently selected gateway node
* @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 list;
spinlock_t list_lock; /* protects gw_list & curr_gw */
struct batadv_gw_node __rcu *curr_gw; /* rcu protected pointer */
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 */
};
/**
* 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
*/
#ifdef CONFIG_BATMAN_ADV_DAT
struct batadv_priv_dat {
batadv_dat_addr_t addr;
struct batadv_hashtable *hash;
struct delayed_work work;
};
#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_softif_vlan - per VLAN attributes set
* @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 {
unsigned short vid;
struct kobject *kobj;
atomic_t ap_isolation; /* boolean */
struct batadv_vlan_tt tt;
struct hlist_node list;
atomic_t refcount;
struct rcu_head rcu;
};
/**
* 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
* @gw_mode: gateway operation: off, client or server (see batadv_gw_modes)
* @gw_sel_class: gateway selection class (applies if gw_mode client)
* @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)
* @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
* @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
* @orig_work: work queue callback item for orig node purging
* @cleanup_work: work queue callback item for soft interface deinit
* @primary_if: one of the hard interfaces assigned to this mesh interface
* becomes the primary interface
* @bat_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
* @network_coding: bool indicating whether network coding is enabled
* @batadv_priv_nc: network coding data
*/
struct batadv_priv {
atomic_t mesh_state;
struct net_device *soft_iface;
struct net_device_stats stats;
uint64_t __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
atomic_t gw_mode;
atomic_t gw_sel_class;
atomic_t orig_interval;
atomic_t hop_penalty;
#ifdef CONFIG_BATMAN_ADV_DEBUG
atomic_t log_level;
#endif
uint32_t isolation_mark;
uint32_t 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 batadv_hashtable *orig_hash;
spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
spinlock_t forw_bcast_list_lock; /* protects forw_bcast_list */
struct delayed_work orig_work;
struct work_struct cleanup_work;
struct batadv_hard_iface __rcu *primary_if; /* rcu protected pointer */
struct batadv_algo_ops *bat_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_NC
atomic_t network_coding;
struct batadv_priv_nc nc;
#endif /* CONFIG_BATMAN_ADV_NC */
};
/**
* 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;
uint8_t icmp_packet[BATADV_ICMP_MAX_PACKET_SIZE];
};
/**
* 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
* @refcount: number of contexts the object is used
* @rcu: struct used for freeing in an RCU-safe manner
*/
#ifdef CONFIG_BATMAN_ADV_BLA
struct batadv_bla_backbone_gw {
uint8_t 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;
uint16_t crc;
atomic_t 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
* @batadv_bla_backbone_gw: pointer to backbone gw claiming this client
* @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 {
uint8_t addr[ETH_ALEN];
unsigned short vid;
struct batadv_bla_backbone_gw *backbone_gw;
unsigned long lasttime;
struct hlist_node hash_entry;
struct rcu_head rcu;
atomic_t 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 {
uint8_t addr[ETH_ALEN];
unsigned short vid;
struct hlist_node hash_entry;
uint16_t flags;
unsigned long added_at;
atomic_t 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
*/
struct batadv_tt_local_entry {
struct batadv_tt_common_entry common;
unsigned long last_seen;
};
/**
* 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
* @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;
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;
uint8_t ttvn;
struct hlist_node list;
atomic_t refcount;
struct rcu_head rcu;
};
/**
* struct batadv_tt_change_node - structure for tt changes occured
* @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
* @list: list node for batadv_priv_tt::req_list
*/
struct batadv_tt_req_node {
uint8_t addr[ETH_ALEN];
unsigned long issued_at;
struct list_head 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 {
uint8_t 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;
uint8_t addr[ETH_ALEN];
atomic_t 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;
atomic_t refcount;
struct list_head packet_list;
spinlock_t packet_list_lock; /* Protects packet_list */
uint8_t next_hop[ETH_ALEN];
uint8_t 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;
};
/**
* 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_socket_client::queue_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
*/
struct batadv_forw_packet {
struct hlist_node list;
unsigned long send_time;
uint8_t own;
struct sk_buff *skb;
uint16_t packet_len;
uint32_t direct_link_flags;
uint8_t num_packets;
struct delayed_work delayed_work;
struct batadv_hard_iface *if_incoming;
struct batadv_hard_iface *if_outgoing;
};
/**
* struct batadv_algo_ops - mesh algorithm callbacks
* @list: list node for the batadv_algo_list
* @name: name of the algorithm
* @bat_iface_enable: init routing info when hard-interface is enabled
* @bat_iface_disable: de-init routing info when hard-interface is disabled
* @bat_iface_update_mac: (re-)init mac addresses of the protocol information
* belonging to this hard-interface
* @bat_primary_iface_set: called when primary interface is selected / changed
* @bat_ogm_schedule: prepare a new outgoing OGM for the send queue
* @bat_ogm_emit: send scheduled OGM
* @bat_neigh_cmp: compare the metrics of two neighbors for their respective
* outgoing interfaces
* @bat_neigh_is_equiv_or_better: check if neigh1 is equally good or better
* than neigh2 for their respective outgoing interface from the metric
* prospective
* @bat_orig_print: print the originator table (optional)
* @bat_orig_free: free the resources allocated by the routing algorithm for an
* orig_node object
* @bat_orig_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
* @bat_orig_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
*/
struct batadv_algo_ops {
struct hlist_node list;
char *name;
int (*bat_iface_enable)(struct batadv_hard_iface *hard_iface);
void (*bat_iface_disable)(struct batadv_hard_iface *hard_iface);
void (*bat_iface_update_mac)(struct batadv_hard_iface *hard_iface);
void (*bat_primary_iface_set)(struct batadv_hard_iface *hard_iface);
void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface);
void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet);
int (*bat_neigh_cmp)(struct batadv_neigh_node *neigh1,
struct batadv_hard_iface *if_outgoing1,
struct batadv_neigh_node *neigh2,
struct batadv_hard_iface *if_outgoing2);
bool (*bat_neigh_is_equiv_or_better)
(struct batadv_neigh_node *neigh1,
struct batadv_hard_iface *if_outgoing1,
struct batadv_neigh_node *neigh2,
struct batadv_hard_iface *if_outgoing2);
/* orig_node handling API */
void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq,
struct batadv_hard_iface *hard_iface);
void (*bat_orig_free)(struct batadv_orig_node *orig_node);
int (*bat_orig_add_if)(struct batadv_orig_node *orig_node,
int max_if_num);
int (*bat_orig_del_if)(struct batadv_orig_node *orig_node,
int max_if_num, int del_if_num);
};
/**
* 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;
uint8_t mac_addr[ETH_ALEN];
unsigned short vid;
unsigned long last_update;
struct hlist_node hash_entry;
atomic_t refcount;
struct rcu_head rcu;
};
/**
* 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
* @value_len: length of the buffer following this struct which contains
* the actual tvlv payload
* @refcount: number of contexts the object is used
*/
struct batadv_tvlv_container {
struct hlist_node list;
struct batadv_tvlv_hdr tvlv_hdr;
atomic_t 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,
uint8_t flags,
void *tvlv_value, uint16_t tvlv_value_len);
int (*unicast_handler)(struct batadv_priv *bat_priv,
uint8_t *src, uint8_t *dst,
void *tvlv_value, uint16_t tvlv_value_len);
uint8_t type;
uint8_t version;
uint8_t flags;
atomic_t 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),
};
#endif /* _NET_BATMAN_ADV_TYPES_H_ */
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