/** * enum mesh_path_flags - mac80211 mesh path flags * * @MESH_PATH_ACTIVE: the mesh path can be used for forwarding * @MESH_PATH_RESOLVING: the discovery process is running for this mesh path * @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence * number * @MESH_PATH_FIXED: the mesh path has been manually set and should not be * modified * @MESH_PATH_RESOLVED: the mesh path can has been resolved * @MESH_PATH_REQ_QUEUED: there is an unsent path request for this destination * already queued up, waiting for the discovery process to start. * @MESH_PATH_DELETED: the mesh path has been deleted and should no longer * be used * * MESH_PATH_RESOLVED is used by the mesh path timer to * decide when to stop or cancel the mesh path discovery.
*/ enum mesh_path_flags {
MESH_PATH_ACTIVE = BIT(0),
MESH_PATH_RESOLVING = BIT(1),
MESH_PATH_SN_VALID = BIT(2),
MESH_PATH_FIXED = BIT(3),
MESH_PATH_RESOLVED = BIT(4),
MESH_PATH_REQ_QUEUED = BIT(5),
MESH_PATH_DELETED = BIT(6),
};
/** * enum mesh_deferred_task_flags - mac80211 mesh deferred tasks * * * * @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks * @MESH_WORK_ROOT: the mesh root station needs to send a frame * @MESH_WORK_DRIFT_ADJUST: time to compensate for clock drift relative to other * mesh nodes * @MESH_WORK_MBSS_CHANGED: rebuild beacon and notify driver of BSS changes
*/ enum mesh_deferred_task_flags {
MESH_WORK_HOUSEKEEPING,
MESH_WORK_ROOT,
MESH_WORK_DRIFT_ADJUST,
MESH_WORK_MBSS_CHANGED,
};
/** * struct mesh_path - mac80211 mesh path structure * * @dst: mesh path destination mac address * @mpp: mesh proxy mac address * @rhash: rhashtable list pointer * @walk_list: linked list containing all mesh_path objects. * @gate_list: list pointer for known gates list * @sdata: mesh subif * @next_hop: mesh neighbor to which frames for this destination will be * forwarded * @timer: mesh path discovery timer * @frame_queue: pending queue for frames sent to this destination while the * path is unresolved * @rcu: rcu head for freeing mesh path * @sn: target sequence number * @metric: current metric to this destination * @hop_count: hops to destination * @exp_time: in jiffies, when the path will expire or when it expired * @discovery_timeout: timeout (lapse in jiffies) used for the last discovery * retry * @discovery_retries: number of discovery retries * @flags: mesh path flags, as specified on &enum mesh_path_flags * @state_lock: mesh path state lock used to protect changes to the * mpath itself. No need to take this lock when adding or removing * an mpath to a hash bucket on a path table. * @rann_snd_addr: the RANN sender address * @rann_metric: the aggregated path metric towards the root node * @last_preq_to_root: Timestamp of last PREQ sent to root * @is_root: the destination station of this path is a root node * @is_gate: the destination station of this path is a mesh gate * @path_change_count: the number of path changes to destination * @fast_tx_check: timestamp of last fast-xmit enable attempt * * * The dst address is unique in the mesh path table. Since the mesh_path is * protected by RCU, deleting the next_hop STA must remove / substitute the * mesh_path structure and wait until that is no longer reachable before * destroying the STA completely.
*/ struct mesh_path {
u8 dst[ETH_ALEN];
u8 mpp[ETH_ALEN]; /* used for MPP or MAP */ struct rhash_head rhash; struct hlist_node walk_list; struct hlist_node gate_list; struct ieee80211_sub_if_data *sdata; struct sta_info __rcu *next_hop; struct timer_list timer; struct sk_buff_head frame_queue; struct rcu_head rcu;
u32 sn;
u32 metric;
u8 hop_count; unsignedlong exp_time;
u32 discovery_timeout;
u8 discovery_retries; enum mesh_path_flags flags;
spinlock_t state_lock;
u8 rann_snd_addr[ETH_ALEN];
u32 rann_metric; unsignedlong last_preq_to_root; unsignedlong fast_tx_check; bool is_root; bool is_gate;
u32 path_change_count;
};
/** * enum ieee80211_mesh_fast_tx_type - cached mesh fast tx entry type * * @MESH_FAST_TX_TYPE_LOCAL: tx from the local vif address as SA * @MESH_FAST_TX_TYPE_PROXIED: local tx with a different SA (e.g. bridged) * @MESH_FAST_TX_TYPE_FORWARDED: forwarded from a different mesh point * @NUM_MESH_FAST_TX_TYPE: number of entry types
*/ enum ieee80211_mesh_fast_tx_type {
MESH_FAST_TX_TYPE_LOCAL,
MESH_FAST_TX_TYPE_PROXIED,
MESH_FAST_TX_TYPE_FORWARDED,
/* must be last */
NUM_MESH_FAST_TX_TYPE
};
/** * struct ieee80211_mesh_fast_tx_key - cached mesh fast tx entry key * * @addr: The Ethernet DA for this entry * @type: cache entry type
*/ struct ieee80211_mesh_fast_tx_key {
u8 addr[ETH_ALEN] __aligned(2);
u16 type;
};
/** * struct ieee80211_mesh_fast_tx - cached mesh fast tx entry * @rhash: rhashtable pointer * @key: the lookup key for this cache entry * @fast_tx: base fast_tx data * @hdr: cached mesh and rfc1042 headers * @hdrlen: length of mesh + rfc1042 * @walk_list: list containing all the fast tx entries * @mpath: mesh path corresponding to the Mesh DA * @mppath: MPP entry corresponding to this DA * @timestamp: Last used time of this entry
*/ struct ieee80211_mesh_fast_tx { struct rhash_head rhash; struct ieee80211_mesh_fast_tx_key key;
/* Recent multicast cache */ /* RMC_BUCKETS must be a power of 2, maximum 256 */ #define RMC_BUCKETS 256 #define RMC_QUEUE_MAX_LEN 4 #define RMC_TIMEOUT (3 * HZ)
/** * struct rmc_entry - entry in the Recent Multicast Cache * * @seqnum: mesh sequence number of the frame * @exp_time: expiration time of the entry, in jiffies * @sa: source address of the frame * @list: hashtable list pointer * * The Recent Multicast Cache keeps track of the latest multicast frames that * have been received by a mesh interface and discards received multicast frames * that are found in the cache.
*/ struct rmc_entry { struct hlist_node list; unsignedlong exp_time;
u32 seqnum;
u8 sa[ETH_ALEN];
};
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