X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fmac80211%2Fmesh.c;h=6a43314295988c76067017be5d19de785e404d54;hb=980da6ce573b7c40886406674ff8f022a975e65e;hp=f76bc26ae4d219301dcde04bda7b62d350007ba1;hpb=51ceddade0fb1e15f080b2555f3b3e1d68c6707e;p=safe%2Fjmp%2Flinux-2.6

diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index f76bc26..6a43314 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008 open80211s Ltd.
+ * Copyright (c) 2008, 2009 open80211s Ltd.
  * Authors:    Luis Carlos Cobo <luisca@cozybit.com>
  * 	       Javier Cardona <javier@cozybit.com>
  *
@@ -12,11 +12,16 @@
 #include "ieee80211_i.h"
 #include "mesh.h"
 
-#define PP_OFFSET 	1		/* Path Selection Protocol */
-#define PM_OFFSET	5		/* Path Selection Metric   */
-#define CC_OFFSET	9		/* Congestion Control Mode */
-#define CAPAB_OFFSET 17
-#define ACCEPT_PLINKS 0x80
+#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
+#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
+#define IEEE80211_MESH_RANN_INTERVAL	     (1 * HZ)
+
+#define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01
+#define MESHCONF_CAPAB_FORWARDING    0x08
+
+#define TMR_RUNNING_HK	0
+#define TMR_RUNNING_MP	1
+#define TMR_RUNNING_MPR	2
 
 int mesh_allocated;
 static struct kmem_cache *rm_cache;
@@ -35,19 +40,34 @@ void ieee80211s_stop(void)
 	kmem_cache_destroy(rm_cache);
 }
 
+static void ieee80211_mesh_housekeeping_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata = (void *) data;
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+
+	set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
+
+	if (local->quiescing) {
+		set_bit(TMR_RUNNING_HK, &ifmsh->timers_running);
+		return;
+	}
+
+	ieee80211_queue_work(&local->hw, &ifmsh->work);
+}
+
 /**
  * mesh_matches_local - check if the config of a mesh point matches ours
  *
  * @ie: information elements of a management frame from the mesh peer
- * @dev: local mesh interface
+ * @sdata: local mesh subif
  *
  * This function checks if the mesh configuration of a mesh point matches the
  * local mesh configuration, i.e. if both nodes belong to the same mesh network.
  */
-bool mesh_matches_local(struct ieee802_11_elems *ie, struct net_device *dev)
+bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-	struct ieee80211_if_sta *sta = &sdata->u.sta;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 
 	/*
 	 * As support for each feature is added, check for matching
@@ -59,11 +79,13 @@ bool mesh_matches_local(struct ieee802_11_elems *ie, struct net_device *dev)
 	 *   - MDA enabled
 	 * - Power management control on fc
 	 */
-	if (sta->mesh_id_len == ie->mesh_id_len &&
-		memcmp(sta->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
-		memcmp(sta->mesh_pp_id, ie->mesh_config + PP_OFFSET, 4) == 0 &&
-		memcmp(sta->mesh_pm_id, ie->mesh_config + PM_OFFSET, 4) == 0 &&
-		memcmp(sta->mesh_cc_id, ie->mesh_config + CC_OFFSET, 4) == 0)
+	if (ifmsh->mesh_id_len == ie->mesh_id_len &&
+		memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
+		(ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
+		(ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
+		(ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
+		(ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
+		(ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))
 		return true;
 
 	return false;
@@ -73,12 +95,11 @@ bool mesh_matches_local(struct ieee802_11_elems *ie, struct net_device *dev)
  * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
  *
  * @ie: information elements of a management frame from the mesh peer
- * @dev: local mesh interface
  */
-bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie,
-			      struct net_device *dev)
+bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
 {
-	return (*(ie->mesh_config + CAPAB_OFFSET) & ACCEPT_PLINKS) != 0;
+	return (ie->mesh_config->meshconf_cap &
+	    MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
 }
 
 /**
@@ -98,41 +119,39 @@ void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
 	 */
 	free_plinks = mesh_plink_availables(sdata);
 
-	if (free_plinks != sdata->u.sta.accepting_plinks)
-		ieee80211_sta_timer((unsigned long) sdata);
+	if (free_plinks != sdata->u.mesh.accepting_plinks)
+		ieee80211_mesh_housekeeping_timer((unsigned long) sdata);
 }
 
-void mesh_ids_set_default(struct ieee80211_if_sta *sta)
+void mesh_ids_set_default(struct ieee80211_if_mesh *sta)
 {
-	u8 def_id[4] = {0x00, 0x0F, 0xAC, 0xff};
-
-	memcpy(sta->mesh_pp_id, def_id, 4);
-	memcpy(sta->mesh_pm_id, def_id, 4);
-	memcpy(sta->mesh_cc_id, def_id, 4);
+	sta->mesh_pp_id = 0;	/* HWMP */
+	sta->mesh_pm_id = 0;	/* Airtime */
+	sta->mesh_cc_id = 0;	/* Disabled */
+	sta->mesh_sp_id = 0;	/* Neighbor Offset */
+	sta->mesh_auth_id = 0;	/* Disabled */
 }
 
-int mesh_rmc_init(struct net_device *dev)
+int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	int i;
 
-	sdata->u.sta.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
-	if (!sdata->u.sta.rmc)
+	sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
+	if (!sdata->u.mesh.rmc)
 		return -ENOMEM;
-	sdata->u.sta.rmc->idx_mask = RMC_BUCKETS - 1;
+	sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
 	for (i = 0; i < RMC_BUCKETS; i++)
-		INIT_LIST_HEAD(&sdata->u.sta.rmc->bucket[i].list);
+		INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list);
 	return 0;
 }
 
-void mesh_rmc_free(struct net_device *dev)
+void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-	struct mesh_rmc *rmc = sdata->u.sta.rmc;
+	struct mesh_rmc *rmc = sdata->u.mesh.rmc;
 	struct rmc_entry *p, *n;
 	int i;
 
-	if (!sdata->u.sta.rmc)
+	if (!sdata->u.mesh.rmc)
 		return;
 
 	for (i = 0; i < RMC_BUCKETS; i++)
@@ -142,7 +161,7 @@ void mesh_rmc_free(struct net_device *dev)
 		}
 
 	kfree(rmc);
-	sdata->u.sta.rmc = NULL;
+	sdata->u.mesh.rmc = NULL;
 }
 
 /**
@@ -158,10 +177,9 @@ void mesh_rmc_free(struct net_device *dev)
  * it.
  */
 int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr,
-		   struct net_device *dev)
+		   struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-	struct mesh_rmc *rmc = sdata->u.sta.rmc;
+	struct mesh_rmc *rmc = sdata->u.mesh.rmc;
 	u32 seqnum = 0;
 	int entries = 0;
 	u8 idx;
@@ -177,8 +195,8 @@ int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr,
 			list_del(&p->list);
 			kmem_cache_free(rm_cache, p);
 			--entries;
-		} else if ((seqnum == p->seqnum)
-				&& (memcmp(sa, p->sa, ETH_ALEN) == 0))
+		} else if ((seqnum == p->seqnum) &&
+			   (memcmp(sa, p->sa, ETH_ALEN) == 0))
 			return -1;
 	}
 
@@ -194,13 +212,13 @@ int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr,
 	return 0;
 }
 
-void mesh_mgmt_ies_add(struct sk_buff *skb, struct net_device *dev)
+void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_supported_band *sband;
 	u8 *pos;
 	int len, i, rate;
+	u8 neighbors;
 
 	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 	len = sband->n_bitrates;
@@ -224,61 +242,61 @@ void mesh_mgmt_ies_add(struct sk_buff *skb, struct net_device *dev)
 		}
 	}
 
-	pos = skb_put(skb, 2 + sdata->u.sta.mesh_id_len);
+	if (sband->band == IEEE80211_BAND_2GHZ) {
+		pos = skb_put(skb, 2 + 1);
+		*pos++ = WLAN_EID_DS_PARAMS;
+		*pos++ = 1;
+		*pos++ = ieee80211_frequency_to_channel(local->hw.conf.channel->center_freq);
+	}
+
+	pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len);
 	*pos++ = WLAN_EID_MESH_ID;
-	*pos++ = sdata->u.sta.mesh_id_len;
-	if (sdata->u.sta.mesh_id_len)
-		memcpy(pos, sdata->u.sta.mesh_id, sdata->u.sta.mesh_id_len);
+	*pos++ = sdata->u.mesh.mesh_id_len;
+	if (sdata->u.mesh.mesh_id_len)
+		memcpy(pos, sdata->u.mesh.mesh_id, sdata->u.mesh.mesh_id_len);
 
-	pos = skb_put(skb, 21);
+	pos = skb_put(skb, 2 + sizeof(struct ieee80211_meshconf_ie));
 	*pos++ = WLAN_EID_MESH_CONFIG;
-	*pos++ = MESH_CFG_LEN;
-	/* Version */
-	*pos++ = 1;
+	*pos++ = sizeof(struct ieee80211_meshconf_ie);
 
 	/* Active path selection protocol ID */
-	memcpy(pos, sdata->u.sta.mesh_pp_id, 4);
-	pos += 4;
+	*pos++ = sdata->u.mesh.mesh_pp_id;
 
 	/* Active path selection metric ID   */
-	memcpy(pos, sdata->u.sta.mesh_pm_id, 4);
-	pos += 4;
+	*pos++ = sdata->u.mesh.mesh_pm_id;
 
 	/* Congestion control mode identifier */
-	memcpy(pos, sdata->u.sta.mesh_cc_id, 4);
-	pos += 4;
+	*pos++ = sdata->u.mesh.mesh_cc_id;
 
-	/* Channel precedence:
-	 * Not running simple channel unification protocol
-	 */
-	memset(pos, 0x00, 4);
-	pos += 4;
+	/* Synchronization protocol identifier */
+	*pos++ = sdata->u.mesh.mesh_sp_id;
+
+	/* Authentication Protocol identifier */
+	*pos++ = sdata->u.mesh.mesh_auth_id;
+
+	/* Mesh Formation Info - number of neighbors */
+	neighbors = atomic_read(&sdata->u.mesh.mshstats.estab_plinks);
+	/* Number of neighbor mesh STAs or 15 whichever is smaller */
+	neighbors = (neighbors > 15) ? 15 : neighbors;
+	*pos++ = neighbors << 1;
 
 	/* Mesh capability */
-	sdata->u.sta.accepting_plinks = mesh_plink_availables(sdata);
-	*pos++ = sdata->u.sta.accepting_plinks ? ACCEPT_PLINKS : 0x00;
+	sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata);
+	*pos = MESHCONF_CAPAB_FORWARDING;
+	*pos++ |= sdata->u.mesh.accepting_plinks ?
+	    MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
 	*pos++ = 0x00;
 
 	return;
 }
 
-u32 mesh_table_hash(u8 *addr, struct net_device *dev, struct mesh_table *tbl)
+u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata, struct mesh_table *tbl)
 {
 	/* Use last four bytes of hw addr and interface index as hash index */
-	return jhash_2words(*(u32 *)(addr+2), dev->ifindex, tbl->hash_rnd)
+	return jhash_2words(*(u32 *)(addr+2), sdata->dev->ifindex, tbl->hash_rnd)
 		& tbl->hash_mask;
 }
 
-u8 mesh_id_hash(u8 *mesh_id, int mesh_id_len)
-{
-	if (!mesh_id_len)
-		return 1;
-	else if (mesh_id_len == 1)
-		return (u8) mesh_id[0];
-	else
-		return (u8) (mesh_id[0] + 2 * mesh_id[1]);
-}
-
 struct mesh_table *mesh_table_alloc(int size_order)
 {
 	int i;
@@ -315,128 +333,431 @@ struct mesh_table *mesh_table_alloc(int size_order)
 	return newtbl;
 }
 
-void mesh_table_free(struct mesh_table *tbl, bool free_leafs)
-{
-	struct hlist_head *mesh_hash;
-	struct hlist_node *p, *q;
-	int i;
-
-	mesh_hash = tbl->hash_buckets;
-	for (i = 0; i <= tbl->hash_mask; i++) {
-		spin_lock(&tbl->hashwlock[i]);
-		hlist_for_each_safe(p, q, &mesh_hash[i]) {
-			tbl->free_node(p, free_leafs);
-			atomic_dec(&tbl->entries);
-		}
-		spin_unlock(&tbl->hashwlock[i]);
-	}
-	kfree(tbl->hash_buckets);
-	kfree(tbl->hashwlock);
-	kfree(tbl);
-}
 
 static void ieee80211_mesh_path_timer(unsigned long data)
 {
 	struct ieee80211_sub_if_data *sdata =
 		(struct ieee80211_sub_if_data *) data;
-	struct ieee80211_if_sta *ifsta = &sdata->u.sta;
-	struct ieee80211_local *local = wdev_priv(&sdata->wdev);
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee80211_local *local = sdata->local;
+
+	if (local->quiescing) {
+		set_bit(TMR_RUNNING_MP, &ifmsh->timers_running);
+		return;
+	}
 
-	queue_work(local->hw.workqueue, &ifsta->work);
+	ieee80211_queue_work(&local->hw, &ifmsh->work);
 }
 
-struct mesh_table *mesh_table_grow(struct mesh_table *tbl)
+static void ieee80211_mesh_path_root_timer(unsigned long data)
 {
-	struct mesh_table *newtbl;
-	struct hlist_head *oldhash;
-	struct hlist_node *p;
-	int err = 0;
-	int i;
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee80211_local *local = sdata->local;
 
-	if (atomic_read(&tbl->entries)
-			< tbl->mean_chain_len * (tbl->hash_mask + 1)) {
-		err = -EPERM;
-		goto endgrow;
-	}
+	set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
 
-	newtbl = mesh_table_alloc(tbl->size_order + 1);
-	if (!newtbl) {
-		err = -ENOMEM;
-		goto endgrow;
+	if (local->quiescing) {
+		set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running);
+		return;
 	}
 
-	newtbl->free_node = tbl->free_node;
-	newtbl->mean_chain_len = tbl->mean_chain_len;
-	newtbl->copy_node = tbl->copy_node;
-	atomic_set(&newtbl->entries, atomic_read(&tbl->entries));
+	ieee80211_queue_work(&local->hw, &ifmsh->work);
+}
 
-	oldhash = tbl->hash_buckets;
-	for (i = 0; i <= tbl->hash_mask; i++)
-		hlist_for_each(p, &oldhash[i])
-			tbl->copy_node(p, newtbl);
+void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
+{
+	if (ifmsh->mshcfg.dot11MeshHWMPRootMode)
+		set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
+	else {
+		clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
+		/* stop running timer */
+		del_timer_sync(&ifmsh->mesh_path_root_timer);
+	}
+}
 
-endgrow:
-	if (err)
-		return NULL;
-	else
-		return newtbl;
+/**
+ * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
+ * @hdr:    	802.11 frame header
+ * @fc:		frame control field
+ * @meshda:	destination address in the mesh
+ * @meshsa:	source address address in the mesh.  Same as TA, as frame is
+ *              locally originated.
+ *
+ * Return the length of the 802.11 (does not include a mesh control header)
+ */
+int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
+				  const u8 *meshda, const u8 *meshsa)
+{
+	if (is_multicast_ether_addr(meshda)) {
+		*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
+		/* DA TA SA */
+		memcpy(hdr->addr1, meshda, ETH_ALEN);
+		memcpy(hdr->addr2, meshsa, ETH_ALEN);
+		memcpy(hdr->addr3, meshsa, ETH_ALEN);
+		return 24;
+	} else {
+		*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
+				IEEE80211_FCTL_TODS);
+		/* RA TA DA SA */
+		memset(hdr->addr1, 0, ETH_ALEN);   /* RA is resolved later */
+		memcpy(hdr->addr2, meshsa, ETH_ALEN);
+		memcpy(hdr->addr3, meshda, ETH_ALEN);
+		memcpy(hdr->addr4, meshsa, ETH_ALEN);
+		return 30;
+	}
 }
 
 /**
  * ieee80211_new_mesh_header - create a new mesh header
  * @meshhdr:    uninitialized mesh header
  * @sdata:	mesh interface to be used
+ * @addr4:	addr4 of the mesh frame (1st in ae header)
+ *              may be NULL
+ * @addr5:	addr5 of the mesh frame (1st or 2nd in ae header)
+ *              may be NULL unless addr6 is present
+ * @addr6:	addr6 of the mesh frame (2nd or 3rd in ae header)
+ * 		may be NULL unless addr5 is present
  *
  * Return the header length.
  */
 int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
-		struct ieee80211_sub_if_data *sdata)
+		struct ieee80211_sub_if_data *sdata, char *addr4,
+		char *addr5, char *addr6)
 {
-	meshhdr->flags = 0;
-	meshhdr->ttl = sdata->u.sta.mshcfg.dot11MeshTTL;
-	put_unaligned(cpu_to_le32(sdata->u.sta.mesh_seqnum), &meshhdr->seqnum);
-	sdata->u.sta.mesh_seqnum++;
+	int aelen = 0;
+	memset(meshhdr, 0, sizeof(*meshhdr));
+	meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
+	put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
+	sdata->u.mesh.mesh_seqnum++;
+	if (addr4) {
+		meshhdr->flags |= MESH_FLAGS_AE_A4;
+		aelen += ETH_ALEN;
+		memcpy(meshhdr->eaddr1, addr4, ETH_ALEN);
+	}
+	if (addr5 && addr6) {
+		meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
+		aelen += 2 * ETH_ALEN;
+		if (!addr4) {
+			memcpy(meshhdr->eaddr1, addr5, ETH_ALEN);
+			memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
+		} else {
+			memcpy(meshhdr->eaddr2, addr5, ETH_ALEN);
+			memcpy(meshhdr->eaddr3, addr6, ETH_ALEN);
+		}
+	}
+	return 6 + aelen;
+}
 
-	return 5;
+static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
+			   struct ieee80211_if_mesh *ifmsh)
+{
+	bool free_plinks;
+
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+	printk(KERN_DEBUG "%s: running mesh housekeeping\n",
+	       sdata->dev->name);
+#endif
+
+	ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
+	mesh_path_expire(sdata);
+
+	free_plinks = mesh_plink_availables(sdata);
+	if (free_plinks != sdata->u.mesh.accepting_plinks)
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
+
+	mod_timer(&ifmsh->housekeeping_timer,
+		  round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
+}
+
+static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+
+	mesh_path_tx_root_frame(sdata);
+	mod_timer(&ifmsh->mesh_path_root_timer,
+		  round_jiffies(jiffies + IEEE80211_MESH_RANN_INTERVAL));
+}
+
+#ifdef CONFIG_PM
+void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+
+	/* might restart the timer but that doesn't matter */
+	cancel_work_sync(&ifmsh->work);
+
+	/* use atomic bitops in case both timers fire at the same time */
+
+	if (del_timer_sync(&ifmsh->housekeeping_timer))
+		set_bit(TMR_RUNNING_HK, &ifmsh->timers_running);
+	if (del_timer_sync(&ifmsh->mesh_path_timer))
+		set_bit(TMR_RUNNING_MP, &ifmsh->timers_running);
+	if (del_timer_sync(&ifmsh->mesh_path_root_timer))
+		set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running);
+}
+
+void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+
+	if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running))
+		add_timer(&ifmsh->housekeeping_timer);
+	if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running))
+		add_timer(&ifmsh->mesh_path_timer);
+	if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running))
+		add_timer(&ifmsh->mesh_path_root_timer);
+	ieee80211_mesh_root_setup(ifmsh);
+}
+#endif
+
+void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee80211_local *local = sdata->local;
+
+	set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
+	ieee80211_mesh_root_setup(ifmsh);
+	ieee80211_queue_work(&local->hw, &ifmsh->work);
+	sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL;
+	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON |
+						BSS_CHANGED_BEACON_ENABLED |
+						BSS_CHANGED_BEACON_INT);
+}
+
+void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
+{
+	del_timer_sync(&sdata->u.mesh.housekeeping_timer);
+	del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
+	/*
+	 * If the timer fired while we waited for it, it will have
+	 * requeued the work. Now the work will be running again
+	 * but will not rearm the timer again because it checks
+	 * whether the interface is running, which, at this point,
+	 * it no longer is.
+	 */
+	cancel_work_sync(&sdata->u.mesh.work);
+
+	/*
+	 * When we get here, the interface is marked down.
+	 * Call synchronize_rcu() to wait for the RX path
+	 * should it be using the interface and enqueuing
+	 * frames at this very time on another CPU.
+	 */
+	rcu_barrier(); /* Wait for RX path and call_rcu()'s */
+	skb_queue_purge(&sdata->u.mesh.skb_queue);
+}
+
+static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
+					u16 stype,
+					struct ieee80211_mgmt *mgmt,
+					size_t len,
+					struct ieee80211_rx_status *rx_status)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee802_11_elems elems;
+	struct ieee80211_channel *channel;
+	u32 supp_rates = 0;
+	size_t baselen;
+	int freq;
+	enum ieee80211_band band = rx_status->band;
+
+	/* ignore ProbeResp to foreign address */
+	if (stype == IEEE80211_STYPE_PROBE_RESP &&
+	    compare_ether_addr(mgmt->da, sdata->dev->dev_addr))
+		return;
+
+	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
+	if (baselen > len)
+		return;
+
+	ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
+			       &elems);
+
+	if (elems.ds_params && elems.ds_params_len == 1)
+		freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
+	else
+		freq = rx_status->freq;
+
+	channel = ieee80211_get_channel(local->hw.wiphy, freq);
+
+	if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
+		return;
+
+	if (elems.mesh_id && elems.mesh_config &&
+	    mesh_matches_local(&elems, sdata)) {
+		supp_rates = ieee80211_sta_get_rates(local, &elems, band);
+
+		mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
+				      mesh_peer_accepts_plinks(&elems));
+	}
+}
+
+static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
+					  struct ieee80211_mgmt *mgmt,
+					  size_t len,
+					  struct ieee80211_rx_status *rx_status)
+{
+	switch (mgmt->u.action.category) {
+	case MESH_PLINK_CATEGORY:
+		mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
+		break;
+	case MESH_PATH_SEL_CATEGORY:
+		mesh_rx_path_sel_frame(sdata, mgmt, len);
+		break;
+	}
+}
+
+static void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+					  struct sk_buff *skb)
+{
+	struct ieee80211_rx_status *rx_status;
+	struct ieee80211_if_mesh *ifmsh;
+	struct ieee80211_mgmt *mgmt;
+	u16 stype;
+
+	ifmsh = &sdata->u.mesh;
+
+	rx_status = IEEE80211_SKB_RXCB(skb);
+	mgmt = (struct ieee80211_mgmt *) skb->data;
+	stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
+
+	switch (stype) {
+	case IEEE80211_STYPE_PROBE_RESP:
+	case IEEE80211_STYPE_BEACON:
+		ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
+					    rx_status);
+		break;
+	case IEEE80211_STYPE_ACTION:
+		ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
+		break;
+	}
+
+	kfree_skb(skb);
+}
+
+static void ieee80211_mesh_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data, u.mesh.work);
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct sk_buff *skb;
+
+	if (!netif_running(sdata->dev))
+		return;
+
+	if (local->scanning)
+		return;
+
+	while ((skb = skb_dequeue(&ifmsh->skb_queue)))
+		ieee80211_mesh_rx_queued_mgmt(sdata, skb);
+
+	if (ifmsh->preq_queue_len &&
+	    time_after(jiffies,
+		       ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
+		mesh_path_start_discovery(sdata);
+
+	if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags))
+		mesh_mpath_table_grow();
+
+	if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags))
+		mesh_mpp_table_grow();
+
+	if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
+		ieee80211_mesh_housekeeping(sdata, ifmsh);
+
+	if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
+		ieee80211_mesh_rootpath(sdata);
+}
+
+void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list)
+		if (ieee80211_vif_is_mesh(&sdata->vif))
+			ieee80211_queue_work(&local->hw, &sdata->u.mesh.work);
+	rcu_read_unlock();
 }
 
 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_if_sta *ifsta = &sdata->u.sta;
-
-	ifsta->mshcfg.dot11MeshRetryTimeout = MESH_RET_T;
-	ifsta->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T;
-	ifsta->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T;
-	ifsta->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR;
-	ifsta->mshcfg.dot11MeshTTL = MESH_TTL;
-	ifsta->mshcfg.auto_open_plinks = true;
-	ifsta->mshcfg.dot11MeshMaxPeerLinks =
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+
+	INIT_WORK(&ifmsh->work, ieee80211_mesh_work);
+	setup_timer(&ifmsh->housekeeping_timer,
+		    ieee80211_mesh_housekeeping_timer,
+		    (unsigned long) sdata);
+	skb_queue_head_init(&sdata->u.mesh.skb_queue);
+
+	ifmsh->mshcfg.dot11MeshRetryTimeout = MESH_RET_T;
+	ifmsh->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T;
+	ifmsh->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T;
+	ifmsh->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR;
+	ifmsh->mshcfg.dot11MeshTTL = MESH_TTL;
+	ifmsh->mshcfg.auto_open_plinks = true;
+	ifmsh->mshcfg.dot11MeshMaxPeerLinks =
 		MESH_MAX_ESTAB_PLINKS;
-	ifsta->mshcfg.dot11MeshHWMPactivePathTimeout =
+	ifmsh->mshcfg.dot11MeshHWMPactivePathTimeout =
 		MESH_PATH_TIMEOUT;
-	ifsta->mshcfg.dot11MeshHWMPpreqMinInterval =
+	ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval =
 		MESH_PREQ_MIN_INT;
-	ifsta->mshcfg.dot11MeshHWMPnetDiameterTraversalTime =
+	ifmsh->mshcfg.dot11MeshHWMPnetDiameterTraversalTime =
 		MESH_DIAM_TRAVERSAL_TIME;
-	ifsta->mshcfg.dot11MeshHWMPmaxPREQretries =
+	ifmsh->mshcfg.dot11MeshHWMPmaxPREQretries =
 		MESH_MAX_PREQ_RETRIES;
-	ifsta->mshcfg.path_refresh_time =
+	ifmsh->mshcfg.path_refresh_time =
 		MESH_PATH_REFRESH_TIME;
-	ifsta->mshcfg.min_discovery_timeout =
+	ifmsh->mshcfg.min_discovery_timeout =
 		MESH_MIN_DISCOVERY_TIMEOUT;
-	ifsta->accepting_plinks = true;
-	ifsta->preq_id = 0;
-	ifsta->dsn = 0;
-	atomic_set(&ifsta->mpaths, 0);
-	mesh_rmc_init(sdata->dev);
-	ifsta->last_preq = jiffies;
+	ifmsh->accepting_plinks = true;
+	ifmsh->preq_id = 0;
+	ifmsh->sn = 0;
+	atomic_set(&ifmsh->mpaths, 0);
+	mesh_rmc_init(sdata);
+	ifmsh->last_preq = jiffies;
 	/* Allocate all mesh structures when creating the first mesh interface. */
 	if (!mesh_allocated)
 		ieee80211s_init();
-	mesh_ids_set_default(ifsta);
-	setup_timer(&ifsta->mesh_path_timer,
+	mesh_ids_set_default(ifmsh);
+	setup_timer(&ifmsh->mesh_path_timer,
 		    ieee80211_mesh_path_timer,
 		    (unsigned long) sdata);
-	INIT_LIST_HEAD(&ifsta->preq_queue.list);
-	spin_lock_init(&ifsta->mesh_preq_queue_lock);
+	setup_timer(&ifmsh->mesh_path_root_timer,
+		    ieee80211_mesh_path_root_timer,
+		    (unsigned long) sdata);
+	INIT_LIST_HEAD(&ifmsh->preq_queue.list);
+	spin_lock_init(&ifmsh->mesh_preq_queue_lock);
+}
+
+ieee80211_rx_result
+ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee80211_mgmt *mgmt;
+	u16 fc;
+
+	if (skb->len < 24)
+		return RX_DROP_MONITOR;
+
+	mgmt = (struct ieee80211_mgmt *) skb->data;
+	fc = le16_to_cpu(mgmt->frame_control);
+
+	switch (fc & IEEE80211_FCTL_STYPE) {
+	case IEEE80211_STYPE_ACTION:
+		if (skb->len < IEEE80211_MIN_ACTION_SIZE)
+			return RX_DROP_MONITOR;
+		/* fall through */
+	case IEEE80211_STYPE_PROBE_RESP:
+	case IEEE80211_STYPE_BEACON:
+		skb_queue_tail(&ifmsh->skb_queue, skb);
+		ieee80211_queue_work(&local->hw, &ifmsh->work);
+		return RX_QUEUED;
+	}
+
+	return RX_CONTINUE;
 }