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Luis Carlos Coboccf80dd2008-02-23 15:17:08 +01001/*
Rui Paulo264d9b72009-11-09 23:46:58 +00002 * Copyright (c) 2008, 2009 open80211s Ltd.
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +01003 * 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
Johannes Berg902acc72008-02-23 15:17:19 +010014#include <linux/types.h>
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010015#include <linux/jhash.h>
Johannes Berg902acc72008-02-23 15:17:19 +010016#include "ieee80211_i.h"
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010017
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010018
19/* Data structures */
20
21/**
22 * enum mesh_path_flags - mac80211 mesh path flags
23 *
24 *
25 *
Rami Roseneb80ed82009-01-19 13:50:32 +020026 * @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
27 * @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
Rui Paulod19b3bf2009-11-09 23:46:55 +000028 * @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence
Johannes Bergbf7cd942013-02-15 14:40:31 +010029 * number
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010030 * @MESH_PATH_FIXED: the mesh path has been manually set and should not be
Johannes Bergbf7cd942013-02-15 14:40:31 +010031 * modified
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010032 * @MESH_PATH_RESOLVED: the mesh path can has been resolved
Javier Cardonaf3011cf2011-11-03 21:11:10 -070033 * @MESH_PATH_REQ_QUEUED: there is an unsent path request for this destination
Johannes Bergbf7cd942013-02-15 14:40:31 +010034 * already queued up, waiting for the discovery process to start.
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010035 *
Rami Roseneb80ed82009-01-19 13:50:32 +020036 * MESH_PATH_RESOLVED is used by the mesh path timer to
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010037 * decide when to stop or cancel the mesh path discovery.
38 */
39enum mesh_path_flags {
40 MESH_PATH_ACTIVE = BIT(0),
41 MESH_PATH_RESOLVING = BIT(1),
Rui Paulod19b3bf2009-11-09 23:46:55 +000042 MESH_PATH_SN_VALID = BIT(2),
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010043 MESH_PATH_FIXED = BIT(3),
44 MESH_PATH_RESOLVED = BIT(4),
Javier Cardonaf3011cf2011-11-03 21:11:10 -070045 MESH_PATH_REQ_QUEUED = BIT(5),
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010046};
47
48/**
Javier Cardona18889232009-08-10 12:15:52 -070049 * 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
Rui Pauloe304bfd2009-11-09 23:46:56 +000058 * @MESH_WORK_ROOT: the mesh root station needs to send a frame
Javier Cardonadbf498f2012-03-31 11:31:32 -070059 * @MESH_WORK_DRIFT_ADJUST: time to compensate for clock drift relative to other
60 * mesh nodes
Javier Cardona18889232009-08-10 12:15:52 -070061 */
62enum mesh_deferred_task_flags {
63 MESH_WORK_HOUSEKEEPING,
64 MESH_WORK_GROW_MPATH_TABLE,
65 MESH_WORK_GROW_MPP_TABLE,
Rui Pauloe304bfd2009-11-09 23:46:56 +000066 MESH_WORK_ROOT,
Javier Cardonadbf498f2012-03-31 11:31:32 -070067 MESH_WORK_DRIFT_ADJUST,
Javier Cardona18889232009-08-10 12:15:52 -070068};
69
70/**
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010071 * struct mesh_path - mac80211 mesh path structure
72 *
73 * @dst: mesh path destination mac address
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +120074 * @sdata: mesh subif
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010075 * @next_hop: mesh neighbor to which frames for this destination will be
Johannes Bergbf7cd942013-02-15 14:40:31 +010076 * forwarded
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010077 * @timer: mesh path discovery timer
78 * @frame_queue: pending queue for frames sent to this destination while the
Johannes Bergbf7cd942013-02-15 14:40:31 +010079 * path is unresolved
Rui Paulod19b3bf2009-11-09 23:46:55 +000080 * @sn: target sequence number
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010081 * @metric: current metric to this destination
82 * @hop_count: hops to destination
83 * @exp_time: in jiffies, when the path will expire or when it expired
84 * @discovery_timeout: timeout (lapse in jiffies) used for the last discovery
Johannes Bergbf7cd942013-02-15 14:40:31 +010085 * retry
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010086 * @discovery_retries: number of discovery retries
87 * @flags: mesh path flags, as specified on &enum mesh_path_flags
Javier Cardonaf5e50cd2011-08-29 13:23:05 -070088 * @state_lock: mesh path state lock used to protect changes to the
89 * mpath itself. No need to take this lock when adding or removing
90 * an mpath to a hash bucket on a path table.
Chun-Yeow Yeoh3d045a52012-02-28 22:00:06 +080091 * @rann_snd_addr: the RANN sender address
Chun-Yeow Yeohd2a079f2012-03-23 18:48:51 +080092 * @rann_metric: the aggregated path metric towards the root node
Chun-Yeow Yeoh728b19e2012-06-14 02:06:10 +080093 * @last_preq_to_root: Timestamp of last PREQ sent to root
Chun-Yeow Yeoh3d045a52012-02-28 22:00:06 +080094 * @is_root: the destination station of this path is a root node
Javier Cardona5ee68e52011-08-09 16:45:08 -070095 * @is_gate: the destination station of this path is a mesh gate
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +010096 *
97 *
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +120098 * The combination of dst and sdata is unique in the mesh path table. Since the
Johannes Bergd0709a62008-02-25 16:27:46 +010099 * next_hop STA is only protected by RCU as well, deleting the STA must also
100 * remove/substitute the mesh_path structure and wait until that is no longer
101 * reachable before destroying the STA completely.
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100102 */
103struct mesh_path {
104 u8 dst[ETH_ALEN];
YanBo79617de2008-09-22 13:30:32 +0800105 u8 mpp[ETH_ALEN]; /* used for MPP or MAP */
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200106 struct ieee80211_sub_if_data *sdata;
Johannes Berg40b275b2011-05-13 14:15:49 +0200107 struct sta_info __rcu *next_hop;
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100108 struct timer_list timer;
109 struct sk_buff_head frame_queue;
110 struct rcu_head rcu;
Rui Paulod19b3bf2009-11-09 23:46:55 +0000111 u32 sn;
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100112 u32 metric;
113 u8 hop_count;
114 unsigned long exp_time;
115 u32 discovery_timeout;
116 u8 discovery_retries;
117 enum mesh_path_flags flags;
118 spinlock_t state_lock;
Chun-Yeow Yeoh3d045a52012-02-28 22:00:06 +0800119 u8 rann_snd_addr[ETH_ALEN];
Chun-Yeow Yeohd2a079f2012-03-23 18:48:51 +0800120 u32 rann_metric;
Chun-Yeow Yeoh728b19e2012-06-14 02:06:10 +0800121 unsigned long last_preq_to_root;
Chun-Yeow Yeoh3d045a52012-02-28 22:00:06 +0800122 bool is_root;
Javier Cardona5ee68e52011-08-09 16:45:08 -0700123 bool is_gate;
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100124};
125
126/**
127 * struct mesh_table
128 *
129 * @hash_buckets: array of hash buckets of the table
130 * @hashwlock: array of locks to protect write operations, one per bucket
131 * @hash_mask: 2^size_order - 1, used to compute hash idx
132 * @hash_rnd: random value used for hash computations
133 * @entries: number of entries in the table
134 * @free_node: function to free nodes of the table
Stefan Weileef35c22010-08-06 21:11:15 +0200135 * @copy_node: function to copy nodes of the table
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100136 * @size_order: determines size of the table, there will be 2^size_order hash
137 * buckets
138 * @mean_chain_len: maximum average length for the hash buckets' list, if it is
139 * reached, the table will grow
Javier Cardona5ee68e52011-08-09 16:45:08 -0700140 * @known_gates: list of known mesh gates and their mpaths by the station. The
141 * gate's mpath may or may not be resolved and active.
142 *
Johannes Berg1928eca2011-05-14 11:00:52 +0200143 * rcu_head: RCU head to free the table
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100144 */
145struct mesh_table {
146 /* Number of buckets will be 2^N */
147 struct hlist_head *hash_buckets;
148 spinlock_t *hashwlock; /* One per bucket, for add/del */
149 unsigned int hash_mask; /* (2^size_order) - 1 */
150 __u32 hash_rnd; /* Used for hash generation */
151 atomic_t entries; /* Up to MAX_MESH_NEIGHBOURS */
152 void (*free_node) (struct hlist_node *p, bool free_leafs);
Pavel Emelyanov4caf86c2008-05-07 19:47:01 +0400153 int (*copy_node) (struct hlist_node *p, struct mesh_table *newtbl);
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100154 int size_order;
155 int mean_chain_len;
Javier Cardona5ee68e52011-08-09 16:45:08 -0700156 struct hlist_head *known_gates;
157 spinlock_t gates_lock;
Johannes Berg1928eca2011-05-14 11:00:52 +0200158
159 struct rcu_head rcu_head;
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100160};
161
162/* Recent multicast cache */
163/* RMC_BUCKETS must be a power of 2, maximum 256 */
164#define RMC_BUCKETS 256
165#define RMC_QUEUE_MAX_LEN 4
166#define RMC_TIMEOUT (3 * HZ)
167
168/**
169 * struct rmc_entry - entry in the Recent Multicast Cache
170 *
171 * @seqnum: mesh sequence number of the frame
172 * @exp_time: expiration time of the entry, in jiffies
173 * @sa: source address of the frame
174 *
175 * The Recent Multicast Cache keeps track of the latest multicast frames that
176 * have been received by a mesh interface and discards received multicast frames
177 * that are found in the cache.
178 */
179struct rmc_entry {
180 struct list_head list;
181 u32 seqnum;
182 unsigned long exp_time;
183 u8 sa[ETH_ALEN];
184};
185
186struct mesh_rmc {
Thomas Pedersenb7cfcd12012-12-17 18:41:57 -0800187 struct list_head bucket[RMC_BUCKETS];
Luis Carlos Cobo51cedda2008-04-23 12:15:29 -0700188 u32 idx_mask;
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100189};
190
Thomas Pedersen25d49e42011-08-11 19:35:15 -0700191#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
192#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100193
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100194#define MESH_PATH_EXPIRE (600 * HZ)
195
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100196/* Default maximum number of plinks per interface */
197#define MESH_MAX_PLINKS 256
198
199/* Maximum number of paths per interface */
200#define MESH_MAX_MPATHS 1024
201
Thomas Pedersen4bd4c2d2012-08-09 18:15:40 -0700202/* Number of frames buffered per destination for unresolved destinations */
203#define MESH_FRAME_QUEUE_LEN 10
204
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100205/* Public interfaces */
206/* Various */
Javier Cardona3c5772a2009-08-10 12:15:48 -0700207int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
Johannes Berg15ff6362009-11-17 13:34:04 +0100208 const u8 *da, const u8 *sa);
Johannes Bergbf7cd942013-02-15 14:40:31 +0100209int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
210 struct ieee80211s_hdr *meshhdr,
211 const char *addr4or5, const char *addr6);
212int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
213 const u8 *addr, struct ieee80211s_hdr *mesh_hdr);
Thomas Pedersenf743ff42012-04-18 19:23:43 -0700214bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
215 struct ieee802_11_elems *ie);
Johannes Berg472dbc42008-09-11 00:01:49 +0200216void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
Johannes Bergbf7cd942013-02-15 14:40:31 +0100217void mesh_mgmt_ies_add(struct ieee80211_sub_if_data *sdata,
218 struct sk_buff *skb);
219int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
220 struct sk_buff *skb);
221int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata,
222 struct sk_buff *skb);
223int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata,
224 struct sk_buff *skb);
225int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
226 struct sk_buff *skb);
227int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
228 struct sk_buff *skb);
229int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
230 struct sk_buff *skb);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200231void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
232int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100233void ieee80211s_init(void);
Javier Cardonabfc32e62009-08-17 17:15:55 -0700234void ieee80211s_update_metric(struct ieee80211_local *local,
Johannes Bergbf7cd942013-02-15 14:40:31 +0100235 struct sta_info *sta, struct sk_buff *skb);
Johannes Berg902acc72008-02-23 15:17:19 +0100236void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
Thomas Pedersen2b5e1962013-02-14 11:20:13 -0800237int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
Johannes Berg472dbc42008-09-11 00:01:49 +0200238void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
Rui Paulo63c57232009-11-09 23:46:57 +0000239void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
Johannes Berg8ba7acf2012-09-30 17:07:19 +0200240const struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method);
Thomas Pedersen2b5e1962013-02-14 11:20:13 -0800241/* wrapper for ieee80211_bss_info_change_notify() */
242void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
243 u32 changed);
Johannes Berg902acc72008-02-23 15:17:19 +0100244
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100245/* mesh power save */
Thomas Pedersen39886b62013-02-13 12:14:19 -0800246u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata);
247u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
248 enum nl80211_mesh_power_mode pm);
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100249void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
250 struct sta_info *sta,
251 struct ieee80211_hdr *hdr);
252void ieee80211_mps_sta_status_update(struct sta_info *sta);
253void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
254 struct ieee80211_hdr *hdr);
255void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta,
256 bool tx, bool acked);
257void ieee80211_mps_frame_release(struct sta_info *sta,
258 struct ieee802_11_elems *elems);
259
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100260/* Mesh paths */
Johannes Bergbf7cd942013-02-15 14:40:31 +0100261int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata,
262 struct sk_buff *skb);
263int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata,
264 struct sk_buff *skb);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200265void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
Johannes Bergbf7cd942013-02-15 14:40:31 +0100266struct mesh_path *mesh_path_lookup(struct ieee80211_sub_if_data *sdata,
267 const u8 *dst);
268struct mesh_path *mpp_path_lookup(struct ieee80211_sub_if_data *sdata,
269 const u8 *dst);
270int mpp_path_add(struct ieee80211_sub_if_data *sdata,
271 const u8 *dst, const u8 *mpp);
272struct mesh_path *
273mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100274void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200275void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200276void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
Johannes Bergbf7cd942013-02-15 14:40:31 +0100277 struct ieee80211_mgmt *mgmt, size_t len);
278int mesh_path_add(struct ieee80211_sub_if_data *sdata, const u8 *dst);
Javier Cardona5ee68e52011-08-09 16:45:08 -0700279
280int mesh_path_add_gate(struct mesh_path *mpath);
281int mesh_path_send_to_gates(struct mesh_path *mpath);
282int mesh_gate_num(struct ieee80211_sub_if_data *sdata);
Johannes Bergbf7cd942013-02-15 14:40:31 +0100283
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100284/* Mesh plinks */
Thomas Pedersenf743ff42012-04-18 19:23:43 -0700285void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
Johannes Bergbf7cd942013-02-15 14:40:31 +0100286 u8 *hw_addr, struct ieee802_11_elems *ie);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200287bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
Marco Porschdf323812012-08-08 07:58:43 +0200288u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100289void mesh_plink_broken(struct sta_info *sta);
Thomas Pedersen45b50282013-02-06 10:17:21 -0800290u32 mesh_plink_deactivate(struct sta_info *sta);
Thomas Pedersen39886b62013-02-13 12:14:19 -0800291u32 mesh_plink_open(struct sta_info *sta);
292u32 mesh_plink_block(struct sta_info *sta);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200293void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
294 struct ieee80211_mgmt *mgmt, size_t len,
295 struct ieee80211_rx_status *rx_status);
Thomas Pedersen45b50282013-02-06 10:17:21 -0800296void mesh_sta_cleanup(struct sta_info *sta);
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100297
298/* Private interfaces */
299/* Mesh tables */
Javier Cardona18889232009-08-10 12:15:52 -0700300void mesh_mpath_table_grow(void);
301void mesh_mpp_table_grow(void);
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100302/* Mesh paths */
Johannes Bergbf7cd942013-02-15 14:40:31 +0100303int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
304 u8 ttl, const u8 *target, __le32 target_sn,
305 __le16 target_rcode, const u8 *ra);
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100306void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);
307void mesh_path_flush_pending(struct mesh_path *mpath);
308void mesh_path_tx_pending(struct mesh_path *mpath);
309int mesh_pathtbl_init(void);
310void mesh_pathtbl_unregister(void);
Johannes Bergbf7cd942013-02-15 14:40:31 +0100311int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr);
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100312void mesh_path_timer(unsigned long data);
313void mesh_path_flush_by_nexthop(struct sta_info *sta);
Johannes Bergbf7cd942013-02-15 14:40:31 +0100314void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
315 struct sk_buff *skb);
Johannes Berg5bb644a2009-05-17 11:40:42 +0200316void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata);
317void mesh_path_restart(struct ieee80211_sub_if_data *sdata);
Rui Pauloe304bfd2009-11-09 23:46:56 +0000318void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100319
Thomas Pedersen25d49e42011-08-11 19:35:15 -0700320bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200321extern int mesh_paths_generation;
322
Johannes Berg902acc72008-02-23 15:17:19 +0100323#ifdef CONFIG_MAC80211_MESH
Marco Porsch1617bab2013-01-07 16:04:49 +0100324static inline
325u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
326{
327 atomic_inc(&sdata->u.mesh.estab_plinks);
328 return mesh_accept_plinks_update(sdata);
329}
330
331static inline
332u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
333{
334 atomic_dec(&sdata->u.mesh.estab_plinks);
335 return mesh_accept_plinks_update(sdata);
336}
337
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100338static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
339{
Johannes Berg472dbc42008-09-11 00:01:49 +0200340 return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
Ashok Nagarajan1258d972012-10-09 13:27:47 -0700341 atomic_read(&sdata->u.mesh.estab_plinks);
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100342}
343
344static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
345{
Johannes Bergd0709a62008-02-25 16:27:46 +0100346 return (min_t(long, mesh_plink_free_count(sdata),
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100347 MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
348}
349
350static inline void mesh_path_activate(struct mesh_path *mpath)
351{
352 mpath->flags |= MESH_PATH_ACTIVE | MESH_PATH_RESOLVED;
353}
354
Javier Cardonac7108a72010-12-16 17:37:50 -0800355static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
356{
357 return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
358}
359
Johannes Berg472dbc42008-09-11 00:01:49 +0200360void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);
361
Johannes Berg5bb644a2009-05-17 11:40:42 +0200362void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata);
363void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata);
364void mesh_plink_quiesce(struct sta_info *sta);
365void mesh_plink_restart(struct sta_info *sta);
Andrei Emeltchenko94c514f2012-04-24 14:18:28 +0300366void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
Javier Cardonadbf498f2012-03-31 11:31:32 -0700367void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
Johannes Bergbf7cd942013-02-15 14:40:31 +0100368void ieee80211s_stop(void);
Johannes Berg902acc72008-02-23 15:17:19 +0100369#else
Johannes Berg472dbc42008-09-11 00:01:49 +0200370static inline void
371ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
Johannes Berg5bb644a2009-05-17 11:40:42 +0200372static inline void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
373{}
374static inline void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
375{}
376static inline void mesh_plink_quiesce(struct sta_info *sta) {}
377static inline void mesh_plink_restart(struct sta_info *sta) {}
Javier Cardonac7108a72010-12-16 17:37:50 -0800378static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
379{ return false; }
Andrei Emeltchenko94c514f2012-04-24 14:18:28 +0300380static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
381{}
Johannes Bergbf7cd942013-02-15 14:40:31 +0100382static inline void ieee80211s_stop(void) {}
Johannes Berg902acc72008-02-23 15:17:19 +0100383#endif
384
Luis Carlos Coboccf80dd2008-02-23 15:17:08 +0100385#endif /* IEEE80211S_H */