[linux-2.6-block.git] / net / mac80211 / mesh.h

/*
 * Copyright (c) 2008, 2009 open80211s Ltd.
 * Authors:    Luis Carlos Cobo <luisca@cozybit.com>
 *             Javier Cardona <javier@cozybit.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef IEEE80211S_H
#define IEEE80211S_H

#include <linux/types.h>
#include <linux/jhash.h>
#include "ieee80211_i.h"


/* Data structures */

/**
 * 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_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),
};

/**
 * enum mesh_deferred_task_flags - mac80211 mesh deferred tasks
 *
 *
 *
 * @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks
 * @MESH_WORK_GROW_MPATH_TABLE: the mesh path table is full and needs
 * to grow.
 * @MESH_WORK_GROW_MPP_TABLE: the mesh portals table is full and needs to
 * grow
 * @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_GROW_MPATH_TABLE,
	MESH_WORK_GROW_MPP_TABLE,
	MESH_WORK_ROOT,
	MESH_WORK_DRIFT_ADJUST,
	MESH_WORK_MBSS_CHANGED,
};

/**
 * struct mesh_path - mac80211 mesh path structure
 *
 * @dst: mesh path destination mac address
 * @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
 * @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
 *
 *
 * The combination of dst and sdata is unique in the mesh path table. Since the
 * next_hop STA is only protected by RCU as well, deleting the STA must also
 * 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 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;
	unsigned long 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;
	unsigned long last_preq_to_root;
	bool is_root;
	bool is_gate;
};

/**
 * struct mesh_table
 *
 * @hash_buckets: array of hash buckets of the table
 * @hashwlock: array of locks to protect write operations, one per bucket
 * @hash_mask: 2^size_order - 1, used to compute hash idx
 * @hash_rnd: random value used for hash computations
 * @entries: number of entries in the table
 * @free_node: function to free nodes of the table
 * @copy_node: function to copy nodes of the table
 * @size_order: determines size of the table, there will be 2^size_order hash
 *	buckets
 * @mean_chain_len: maximum average length for the hash buckets' list, if it is
 *	reached, the table will grow
 * @known_gates: list of known mesh gates and their mpaths by the station. The
 * gate's mpath may or may not be resolved and active.
 *
 * rcu_head: RCU head to free the table
 */
struct mesh_table {
	/* Number of buckets will be 2^N */
	struct hlist_head *hash_buckets;
	spinlock_t *hashwlock;		/* One per bucket, for add/del */
	unsigned int hash_mask;		/* (2^size_order) - 1 */
	__u32 hash_rnd;			/* Used for hash generation */
	atomic_t entries;		/* Up to MAX_MESH_NEIGHBOURS */
	void (*free_node) (struct hlist_node *p, bool free_leafs);
	int (*copy_node) (struct hlist_node *p, struct mesh_table *newtbl);
	int size_order;
	int mean_chain_len;
	struct hlist_head *known_gates;
	spinlock_t gates_lock;

	struct rcu_head rcu_head;
};

/* 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
 *
 * 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 list_head list;
	u32 seqnum;
	unsigned long exp_time;
	u8 sa[ETH_ALEN];
};

struct mesh_rmc {
	struct list_head bucket[RMC_BUCKETS];
	u32 idx_mask;
};

#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)

#define MESH_PATH_EXPIRE (600 * HZ)

/* Default maximum number of plinks per interface */
#define MESH_MAX_PLINKS		256

/* Maximum number of paths per interface */
#define MESH_MAX_MPATHS		1024

/* Number of frames buffered per destination for unresolved destinations */
#define MESH_FRAME_QUEUE_LEN	10

/* Public interfaces */
/* Various */
int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
				  const u8 *da, const u8 *sa);
int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
			      struct ieee80211s_hdr *meshhdr,
			      const char *addr4or5, const char *addr6);
int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
		   const u8 *addr, struct ieee80211s_hdr *mesh_hdr);
bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
			struct ieee802_11_elems *ie);
void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
			 struct sk_buff *skb);
int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata,
		       struct sk_buff *skb);
int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata,
		    struct sk_buff *skb);
int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
			struct sk_buff *skb);
int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
		       struct sk_buff *skb);
int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
			struct sk_buff *skb);
void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
void ieee80211s_init(void);
void ieee80211s_update_metric(struct ieee80211_local *local,
			      struct sta_info *sta, struct sk_buff *skb);
void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
const struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method);
/* wrapper for ieee80211_bss_info_change_notify() */
void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
				       u32 changed);

/* mesh power save */
u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata);
u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
				   enum nl80211_mesh_power_mode pm);
void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
				   struct sta_info *sta,
				   struct ieee80211_hdr *hdr);
void ieee80211_mps_sta_status_update(struct sta_info *sta);
void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
				    struct ieee80211_hdr *hdr);
void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta,
				    bool tx, bool acked);
void ieee80211_mps_frame_release(struct sta_info *sta,
				 struct ieee802_11_elems *elems);

/* Mesh paths */
int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata,
			struct sk_buff *skb);
int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata,
			 struct sk_buff *skb);
void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
struct mesh_path *mesh_path_lookup(struct ieee80211_sub_if_data *sdata,
				   const u8 *dst);
struct mesh_path *mpp_path_lookup(struct ieee80211_sub_if_data *sdata,
				  const u8 *dst);
int mpp_path_add(struct ieee80211_sub_if_data *sdata,
		 const u8 *dst, const u8 *mpp);
struct mesh_path *
mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
struct mesh_path *
mpp_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop);
void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
			    struct ieee80211_mgmt *mgmt, size_t len);
struct mesh_path *
mesh_path_add(struct ieee80211_sub_if_data *sdata, const u8 *dst);

int mesh_path_add_gate(struct mesh_path *mpath);
int mesh_path_send_to_gates(struct mesh_path *mpath);
int mesh_gate_num(struct ieee80211_sub_if_data *sdata);

/* Mesh plinks */
void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
			   u8 *hw_addr, struct ieee802_11_elems *ie);
bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
void mesh_plink_broken(struct sta_info *sta);
u32 mesh_plink_deactivate(struct sta_info *sta);
u32 mesh_plink_open(struct sta_info *sta);
u32 mesh_plink_block(struct sta_info *sta);
void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
			 struct ieee80211_mgmt *mgmt, size_t len,
			 struct ieee80211_rx_status *rx_status);
void mesh_sta_cleanup(struct sta_info *sta);

/* Private interfaces */
/* Mesh tables */
void mesh_mpath_table_grow(void);
void mesh_mpp_table_grow(void);
/* Mesh paths */
int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
		       u8 ttl, const u8 *target, u32 target_sn,
		       u16 target_rcode, const u8 *ra);
void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);
void mesh_path_flush_pending(struct mesh_path *mpath);
void mesh_path_tx_pending(struct mesh_path *mpath);
int mesh_pathtbl_init(void);
void mesh_pathtbl_unregister(void);
int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr);
void mesh_path_timer(unsigned long data);
void mesh_path_flush_by_nexthop(struct sta_info *sta);
void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
			     struct sk_buff *skb);
void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);

bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
extern int mesh_paths_generation;
extern int mpp_paths_generation;

#ifdef CONFIG_MAC80211_MESH
static inline
u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
{
	atomic_inc(&sdata->u.mesh.estab_plinks);
	return mesh_accept_plinks_update(sdata) | BSS_CHANGED_BEACON;
}

static inline
u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
{
	atomic_dec(&sdata->u.mesh.estab_plinks);
	return mesh_accept_plinks_update(sdata) | BSS_CHANGED_BEACON;
}

static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
{
	return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
	       atomic_read(&sdata->u.mesh.estab_plinks);
}

static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
{
	return (min_t(long, mesh_plink_free_count(sdata),
		   MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
}

static inline void mesh_path_activate(struct mesh_path *mpath)
{
	mpath->flags |= MESH_PATH_ACTIVE | MESH_PATH_RESOLVED;
}

static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
{
	return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
}

void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);

void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
void ieee80211s_stop(void);
#else
static inline void
ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
{ return false; }
static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
{}
static inline void ieee80211s_stop(void) {}
#endif

#endif /* IEEE80211S_H */
Commit	Line	Data
ccf80ddf	1	/*
264d9b7d	2	* Copyright (c) 2008, 2009 open80211s Ltd.
ccf80ddf LCC	3	* Authors: Luis Carlos Cobo <luisca@cozybit.com>
	4	* Javier Cardona <javier@cozybit.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	#ifndef IEEE80211S_H
	12	#define IEEE80211S_H
	13
902acc78	14	#include <linux/types.h>
ccf80ddf	15	#include <linux/jhash.h>
902acc78	16	#include "ieee80211_i.h"
ccf80ddf	17
ccf80ddf LCC	18
	19	/* Data structures */
	20
	21	/**
	22	* enum mesh_path_flags - mac80211 mesh path flags
	23	*
	24	*
	25	*
eb80ed8d RR	26	* @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
eb80ed8d RR	27	* @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
d19b3bf6	28	* @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence
bf7cd94d	29	* number
ccf80ddf	30	* @MESH_PATH_FIXED: the mesh path has been manually set and should not be
bf7cd94d	31	* modified
ccf80ddf	32	* @MESH_PATH_RESOLVED: the mesh path can has been resolved
f3011cf9	33	* @MESH_PATH_REQ_QUEUED: there is an unsent path request for this destination
bf7cd94d	34	* already queued up, waiting for the discovery process to start.
ccf80ddf	35	*
eb80ed8d	36	* MESH_PATH_RESOLVED is used by the mesh path timer to
ccf80ddf LCC	37	* decide when to stop or cancel the mesh path discovery.
	38	*/
	39	enum mesh_path_flags {
	40	MESH_PATH_ACTIVE = BIT(0),
	41	MESH_PATH_RESOLVING = BIT(1),
d19b3bf6	42	MESH_PATH_SN_VALID = BIT(2),
ccf80ddf LCC	43	MESH_PATH_FIXED = BIT(3),
ccf80ddf LCC	44	MESH_PATH_RESOLVED = BIT(4),
f3011cf9	45	MESH_PATH_REQ_QUEUED = BIT(5),
ccf80ddf LCC	46	};
ccf80ddf LCC	47
18889231 JC	48	/**
	49	* enum mesh_deferred_task_flags - mac80211 mesh deferred tasks
	50	*
	51	*
	52	*
	53	* @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks
	54	* @MESH_WORK_GROW_MPATH_TABLE: the mesh path table is full and needs
	55	* to grow.
	56	* @MESH_WORK_GROW_MPP_TABLE: the mesh portals table is full and needs to
	57	* grow
e304bfd3	58	* @MESH_WORK_ROOT: the mesh root station needs to send a frame
dbf498fb JC	59	* @MESH_WORK_DRIFT_ADJUST: time to compensate for clock drift relative to other
dbf498fb JC	60	* mesh nodes
f81a9ded	61	* @MESH_WORK_MBSS_CHANGED: rebuild beacon and notify driver of BSS changes
18889231 JC	62	*/
	63	enum mesh_deferred_task_flags {
	64	MESH_WORK_HOUSEKEEPING,
	65	MESH_WORK_GROW_MPATH_TABLE,
	66	MESH_WORK_GROW_MPP_TABLE,
e304bfd3	67	MESH_WORK_ROOT,
dbf498fb	68	MESH_WORK_DRIFT_ADJUST,
f81a9ded	69	MESH_WORK_MBSS_CHANGED,
18889231 JC	70	};
18889231 JC	71
ccf80ddf LCC	72	/**
	73	* struct mesh_path - mac80211 mesh path structure
	74	*
	75	* @dst: mesh path destination mac address
f698d856	76	* @sdata: mesh subif
ccf80ddf	77	* @next_hop: mesh neighbor to which frames for this destination will be
bf7cd94d	78	* forwarded
ccf80ddf LCC	79	* @timer: mesh path discovery timer
ccf80ddf LCC	80	* @frame_queue: pending queue for frames sent to this destination while the
bf7cd94d	81	* path is unresolved
d19b3bf6	82	* @sn: target sequence number
ccf80ddf LCC	83	* @metric: current metric to this destination
	84	* @hop_count: hops to destination
	85	* @exp_time: in jiffies, when the path will expire or when it expired
	86	* @discovery_timeout: timeout (lapse in jiffies) used for the last discovery
bf7cd94d	87	* retry
ccf80ddf LCC	88	* @discovery_retries: number of discovery retries
ccf80ddf LCC	89	* @flags: mesh path flags, as specified on &enum mesh_path_flags
f5e50cd0 JC	90	* @state_lock: mesh path state lock used to protect changes to the
	91	* mpath itself. No need to take this lock when adding or removing
	92	* an mpath to a hash bucket on a path table.
3d045a54	93	* @rann_snd_addr: the RANN sender address
d2a079fd	94	* @rann_metric: the aggregated path metric towards the root node
728b19e5	95	* @last_preq_to_root: Timestamp of last PREQ sent to root
3d045a54	96	* @is_root: the destination station of this path is a root node
5ee68e5b	97	* @is_gate: the destination station of this path is a mesh gate
ccf80ddf LCC	98	*
ccf80ddf LCC	99	*
f698d856	100	* The combination of dst and sdata is unique in the mesh path table. Since the
d0709a65 JB	101	* next_hop STA is only protected by RCU as well, deleting the STA must also
	102	* remove/substitute the mesh_path structure and wait until that is no longer
	103	* reachable before destroying the STA completely.
ccf80ddf LCC	104	*/
	105	struct mesh_path {
	106	u8 dst[ETH_ALEN];
79617dee	107	u8 mpp[ETH_ALEN]; /* used for MPP or MAP */
f698d856	108	struct ieee80211_sub_if_data *sdata;
40b275b6	109	struct sta_info __rcu *next_hop;
ccf80ddf LCC	110	struct timer_list timer;
	111	struct sk_buff_head frame_queue;
	112	struct rcu_head rcu;
d19b3bf6	113	u32 sn;
ccf80ddf LCC	114	u32 metric;
	115	u8 hop_count;
	116	unsigned long exp_time;
	117	u32 discovery_timeout;
	118	u8 discovery_retries;
	119	enum mesh_path_flags flags;
	120	spinlock_t state_lock;
3d045a54	121	u8 rann_snd_addr[ETH_ALEN];
d2a079fd	122	u32 rann_metric;
728b19e5	123	unsigned long last_preq_to_root;
3d045a54	124	bool is_root;
5ee68e5b	125	bool is_gate;
ccf80ddf LCC	126	};
	127
	128	/**
	129	* struct mesh_table
	130	*
	131	* @hash_buckets: array of hash buckets of the table
	132	* @hashwlock: array of locks to protect write operations, one per bucket
	133	* @hash_mask: 2^size_order - 1, used to compute hash idx
	134	* @hash_rnd: random value used for hash computations
	135	* @entries: number of entries in the table
	136	* @free_node: function to free nodes of the table
eef35c2d	137	* @copy_node: function to copy nodes of the table
ccf80ddf LCC	138	* @size_order: determines size of the table, there will be 2^size_order hash
	139	* buckets
	140	* @mean_chain_len: maximum average length for the hash buckets' list, if it is
	141	* reached, the table will grow
5ee68e5b JC	142	* @known_gates: list of known mesh gates and their mpaths by the station. The
	143	* gate's mpath may or may not be resolved and active.
	144	*
1928ecab	145	* rcu_head: RCU head to free the table
ccf80ddf LCC	146	*/
	147	struct mesh_table {
	148	/* Number of buckets will be 2^N */
	149	struct hlist_head *hash_buckets;
	150	spinlock_t hashwlock; / One per bucket, for add/del */
	151	unsigned int hash_mask; /* (2^size_order) - 1 */
	152	__u32 hash_rnd; /* Used for hash generation */
	153	atomic_t entries; /* Up to MAX_MESH_NEIGHBOURS */
	154	void (free_node) (struct hlist_node p, bool free_leafs);
4caf86c6	155	int (copy_node) (struct hlist_node p, struct mesh_table *newtbl);
ccf80ddf LCC	156	int size_order;
ccf80ddf LCC	157	int mean_chain_len;
5ee68e5b JC	158	struct hlist_head *known_gates;
5ee68e5b JC	159	spinlock_t gates_lock;
1928ecab JB	160
1928ecab JB	161	struct rcu_head rcu_head;
ccf80ddf LCC	162	};
	163
	164	/* Recent multicast cache */
	165	/* RMC_BUCKETS must be a power of 2, maximum 256 */
	166	#define RMC_BUCKETS 256
	167	#define RMC_QUEUE_MAX_LEN 4
	168	#define RMC_TIMEOUT (3 * HZ)
	169
	170	/**
	171	* struct rmc_entry - entry in the Recent Multicast Cache
	172	*
	173	* @seqnum: mesh sequence number of the frame
	174	* @exp_time: expiration time of the entry, in jiffies
	175	* @sa: source address of the frame
	176	*
	177	* The Recent Multicast Cache keeps track of the latest multicast frames that
	178	* have been received by a mesh interface and discards received multicast frames
	179	* that are found in the cache.
	180	*/
	181	struct rmc_entry {
	182	struct list_head list;
	183	u32 seqnum;
	184	unsigned long exp_time;
	185	u8 sa[ETH_ALEN];
	186	};
	187
	188	struct mesh_rmc {
b7cfcd11	189	struct list_head bucket[RMC_BUCKETS];
51ceddad	190	u32 idx_mask;
ccf80ddf LCC	191	};
ccf80ddf LCC	192
25d49e4d	193	#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
ccf80ddf	194
ccf80ddf LCC	195	#define MESH_PATH_EXPIRE (600 * HZ)
ccf80ddf LCC	196
ccf80ddf LCC	197	/* Default maximum number of plinks per interface */
	198	#define MESH_MAX_PLINKS 256
	199
	200	/* Maximum number of paths per interface */
	201	#define MESH_MAX_MPATHS 1024
	202
4bd4c2dd TP	203	/* Number of frames buffered per destination for unresolved destinations */
	204	#define MESH_FRAME_QUEUE_LEN 10
	205
ccf80ddf LCC	206	/* Public interfaces */
ccf80ddf LCC	207	/* Various */
3c5772a5	208	int ieee80211_fill_mesh_addresses(struct ieee80211_hdr hdr, __le16 fc,
15ff6365	209	const u8 da, const u8 sa);
bf7cd94d JB	210	int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
	211	struct ieee80211s_hdr *meshhdr,
	212	const char addr4or5, const char addr6);
	213	int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
	214	const u8 addr, struct ieee80211s_hdr mesh_hdr);
f743ff49 TP	215	bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
f743ff49 TP	216	struct ieee802_11_elems *ie);
472dbc45	217	void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
bf7cd94d JB	218	int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
	219	struct sk_buff *skb);
	220	int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata,
	221	struct sk_buff *skb);
	222	int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata,
	223	struct sk_buff *skb);
	224	int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
	225	struct sk_buff *skb);
	226	int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
	227	struct sk_buff *skb);
	228	int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
	229	struct sk_buff *skb);
f698d856 JBG	230	void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
f698d856 JBG	231	int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
ccf80ddf	232	void ieee80211s_init(void);
bfc32e6a	233	void ieee80211s_update_metric(struct ieee80211_local *local,
bf7cd94d	234	struct sta_info sta, struct sk_buff skb);
902acc78	235	void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
2b5e1967	236	int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
472dbc45	237	void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
63c5723b	238	void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
8ba7acf3	239	const struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method);
2b5e1967 TP	240	/* wrapper for ieee80211_bss_info_change_notify() */
	241	void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
	242	u32 changed);
902acc78	243
3f52b7e3	244	/* mesh power save */
39886b61 TP	245	u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata);
	246	u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
	247	enum nl80211_mesh_power_mode pm);
3f52b7e3 MP	248	void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
	249	struct sta_info *sta,
	250	struct ieee80211_hdr *hdr);
	251	void ieee80211_mps_sta_status_update(struct sta_info *sta);
	252	void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
	253	struct ieee80211_hdr *hdr);
	254	void ieee80211_mpsp_trigger_process(u8 qc, struct sta_info sta,
	255	bool tx, bool acked);
	256	void ieee80211_mps_frame_release(struct sta_info *sta,
	257	struct ieee802_11_elems *elems);
	258
ccf80ddf	259	/* Mesh paths */
bf7cd94d JB	260	int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata,
	261	struct sk_buff *skb);
	262	int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata,
	263	struct sk_buff *skb);
f698d856	264	void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
bf7cd94d JB	265	struct mesh_path mesh_path_lookup(struct ieee80211_sub_if_data sdata,
	266	const u8 *dst);
	267	struct mesh_path mpp_path_lookup(struct ieee80211_sub_if_data sdata,
	268	const u8 *dst);
	269	int mpp_path_add(struct ieee80211_sub_if_data *sdata,
	270	const u8 dst, const u8 mpp);
	271	struct mesh_path *
	272	mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
a2db2ed3 HR	273	struct mesh_path *
a2db2ed3 HR	274	mpp_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
ccf80ddf	275	void mesh_path_fix_nexthop(struct mesh_path mpath, struct sta_info next_hop);
f698d856	276	void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
f698d856	277	void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
bf7cd94d	278	struct ieee80211_mgmt *mgmt, size_t len);
ae76eef0 BC	279	struct mesh_path *
ae76eef0 BC	280	mesh_path_add(struct ieee80211_sub_if_data sdata, const u8 dst);
5ee68e5b JC	281
	282	int mesh_path_add_gate(struct mesh_path *mpath);
	283	int mesh_path_send_to_gates(struct mesh_path *mpath);
	284	int mesh_gate_num(struct ieee80211_sub_if_data *sdata);
bf7cd94d	285
ccf80ddf	286	/* Mesh plinks */
f743ff49	287	void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
bf7cd94d	288	u8 hw_addr, struct ieee802_11_elems ie);
f698d856	289	bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
df323818	290	u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
ccf80ddf	291	void mesh_plink_broken(struct sta_info *sta);
45b5028e	292	u32 mesh_plink_deactivate(struct sta_info *sta);
39886b61 TP	293	u32 mesh_plink_open(struct sta_info *sta);
39886b61 TP	294	u32 mesh_plink_block(struct sta_info *sta);
f698d856 JBG	295	void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
	296	struct ieee80211_mgmt *mgmt, size_t len,
	297	struct ieee80211_rx_status *rx_status);
45b5028e	298	void mesh_sta_cleanup(struct sta_info *sta);
ccf80ddf LCC	299
	300	/* Private interfaces */
	301	/* Mesh tables */
18889231 JC	302	void mesh_mpath_table_grow(void);
18889231 JC	303	void mesh_mpp_table_grow(void);
ccf80ddf	304	/* Mesh paths */
bf7cd94d	305	int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
f63f8421 CYY	306	u8 ttl, const u8 *target, u32 target_sn,
f63f8421 CYY	307	u16 target_rcode, const u8 *ra);
ccf80ddf LCC	308	void mesh_path_assign_nexthop(struct mesh_path mpath, struct sta_info sta);
	309	void mesh_path_flush_pending(struct mesh_path *mpath);
	310	void mesh_path_tx_pending(struct mesh_path *mpath);
	311	int mesh_pathtbl_init(void);
	312	void mesh_pathtbl_unregister(void);
bf7cd94d	313	int mesh_path_del(struct ieee80211_sub_if_data sdata, const u8 addr);
ccf80ddf LCC	314	void mesh_path_timer(unsigned long data);
ccf80ddf LCC	315	void mesh_path_flush_by_nexthop(struct sta_info *sta);
bf7cd94d JB	316	void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
bf7cd94d JB	317	struct sk_buff *skb);
e304bfd3	318	void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
ccf80ddf	319
25d49e4d	320	bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
f5ea9120	321	extern int mesh_paths_generation;
a2db2ed3	322	extern int mpp_paths_generation;
f5ea9120	323
902acc78	324	#ifdef CONFIG_MAC80211_MESH
1617bab8 MP	325	static inline
	326	u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
	327	{
	328	atomic_inc(&sdata->u.mesh.estab_plinks);
e05ecccd	329	return mesh_accept_plinks_update(sdata) \| BSS_CHANGED_BEACON;
1617bab8 MP	330	}
	331
	332	static inline
	333	u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
	334	{
	335	atomic_dec(&sdata->u.mesh.estab_plinks);
e05ecccd	336	return mesh_accept_plinks_update(sdata) \| BSS_CHANGED_BEACON;
1617bab8 MP	337	}
1617bab8 MP	338
ccf80ddf LCC	339	static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
ccf80ddf LCC	340	{
472dbc45	341	return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
1258d976	342	atomic_read(&sdata->u.mesh.estab_plinks);
ccf80ddf LCC	343	}
	344
	345	static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
	346	{
d0709a65	347	return (min_t(long, mesh_plink_free_count(sdata),
ccf80ddf LCC	348	MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
	349	}
	350
	351	static inline void mesh_path_activate(struct mesh_path *mpath)
	352	{
	353	mpath->flags \|= MESH_PATH_ACTIVE \| MESH_PATH_RESOLVED;
	354	}
	355
c7108a71 JC	356	static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
	357	{
	358	return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
	359	}
	360
472dbc45 JB	361	void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);
472dbc45 JB	362
94c514fe	363	void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
dbf498fb	364	void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
bf7cd94d	365	void ieee80211s_stop(void);
902acc78	366	#else
472dbc45 JB	367	static inline void
472dbc45 JB	368	ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
c7108a71 JC	369	static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
c7108a71 JC	370	{ return false; }
94c514fe AE	371	static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
94c514fe AE	372	{}
bf7cd94d	373	static inline void ieee80211s_stop(void) {}
902acc78 JB	374	#endif
902acc78 JB	375
ccf80ddf	376	#endif /* IEEE80211S_H */