Release 4.11 net/mac80211/mesh_plink.c

/*
 * Copyright (c) 2008, 2009 open80211s Ltd.
 * Author:     Luis Carlos Cobo <luisca@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.
 */
#include <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/random.h>
#include <linux/rculist.h>

#include "ieee80211_i.h"
#include "rate.h"
#include "mesh.h"


#define PLINK_CNF_AID(mgmt) ((mgmt)->u.action.u.self_prot.variable + 2)

#define PLINK_GET_LLID(p) (p + 2)

#define PLINK_GET_PLID(p) (p + 4)


#define mod_plink_timer(s, t) (mod_timer(&s->mesh->plink_timer, \
                                jiffies + msecs_to_jiffies(t)))


enum plink_event {
	
PLINK_UNDEFINED,
	
OPN_ACPT,
	
OPN_RJCT,
	
OPN_IGNR,
	
CNF_ACPT,
	
CNF_RJCT,
	
CNF_IGNR,
	
CLS_ACPT,
	
CLS_IGNR
};


static const char * const mplstates[] = {
	[NL80211_PLINK_LISTEN] = "LISTEN",
	[NL80211_PLINK_OPN_SNT] = "OPN-SNT",
	[NL80211_PLINK_OPN_RCVD] = "OPN-RCVD",
	[NL80211_PLINK_CNF_RCVD] = "CNF_RCVD",
	[NL80211_PLINK_ESTAB] = "ESTAB",
	[NL80211_PLINK_HOLDING] = "HOLDING",
	[NL80211_PLINK_BLOCKED] = "BLOCKED"
};


static const char * const mplevents[] = {
	[PLINK_UNDEFINED] = "NONE",
	[OPN_ACPT] = "OPN_ACPT",
	[OPN_RJCT] = "OPN_RJCT",
	[OPN_IGNR] = "OPN_IGNR",
	[CNF_ACPT] = "CNF_ACPT",
	[CNF_RJCT] = "CNF_RJCT",
	[CNF_IGNR] = "CNF_IGNR",
	[CLS_ACPT] = "CLS_ACPT",
	[CLS_IGNR] = "CLS_IGNR"
};

/* We only need a valid sta if user configured a minimum rssi_threshold. */


static bool rssi_threshold_check(struct ieee80211_sub_if_data *sdata,
				 struct sta_info *sta)
{
	s32 rssi_threshold = sdata->u.mesh.mshcfg.rssi_threshold;
	return rssi_threshold == 0 ||
	       (sta &&
		(s8)-ewma_signal_read(&sta->rx_stats_avg.signal) >
						rssi_threshold);
}

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/**
 * mesh_plink_fsm_restart - restart a mesh peer link finite state machine
 *
 * @sta: mesh peer link to restart
 *
 * Locking: this function must be called holding sta->mesh->plink_lock
 */


static inline void mesh_plink_fsm_restart(struct sta_info *sta)
{
	lockdep_assert_held(&sta->mesh->plink_lock);
	sta->mesh->plink_state = NL80211_PLINK_LISTEN;
	sta->mesh->llid = sta->mesh->plid = sta->mesh->reason = 0;
	sta->mesh->plink_retries = 0;
}

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8
13.79%
1
20.00%
Javier Cardona
1
1.72%
1
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58
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5
100.00%

/*
 * mesh_set_short_slot_time - enable / disable ERP short slot time.
 *
 * The standard indirectly mandates mesh STAs to turn off short slot time by
 * disallowing advertising this (802.11-2012 8.4.1.4), but that doesn't mean we
 * can't be sneaky about it. Enable short slot time if all mesh STAs in the
 * MBSS support ERP rates.
 *
 * Returns BSS_CHANGED_ERP_SLOT or 0 for no change.
 */


static u32 mesh_set_short_slot_time(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;
	enum nl80211_band band = ieee80211_get_sdata_band(sdata);
	struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
	struct sta_info *sta;
	u32 erp_rates = 0, changed = 0;
	int i;
	bool short_slot = false;

	if (band == NL80211_BAND_5GHZ) {
		/* (IEEE 802.11-2012 19.4.5) */
		short_slot = true;
		goto out;
	} else if (band != NL80211_BAND_2GHZ)
		goto out;

	for (i = 0; i < sband->n_bitrates; i++)
		if (sband->bitrates[i].flags & IEEE80211_RATE_ERP_G)
			erp_rates |= BIT(i);

	if (!erp_rates)
		goto out;

	rcu_read_lock();
	list_for_each_entry_rcu(sta, &local->sta_list, list) {
		if (sdata != sta->sdata ||
		    sta->mesh->plink_state != NL80211_PLINK_ESTAB)
			continue;

		short_slot = false;
		if (erp_rates & sta->sta.supp_rates[band])
			short_slot = true;
		 else
			break;
	}
	rcu_read_unlock();

out:
	if (sdata->vif.bss_conf.use_short_slot != short_slot) {
		sdata->vif.bss_conf.use_short_slot = short_slot;
		changed = BSS_CHANGED_ERP_SLOT;
		mpl_dbg(sdata, "mesh_plink %pM: ERP short slot time %d\n",
			sdata->vif.addr, short_slot);
	}
	return changed;
}

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/**
 * mesh_set_ht_prot_mode - set correct HT protection mode
 *
 * Section 9.23.3.5 of IEEE 80211-2012 describes the protection rules for HT
 * mesh STA in a MBSS. Three HT protection modes are supported for now, non-HT
 * mixed mode, 20MHz-protection and no-protection mode. non-HT mixed mode is
 * selected if any non-HT peers are present in our MBSS.  20MHz-protection mode
 * is selected if all peers in our 20/40MHz MBSS support HT and atleast one
 * HT20 peer is present. Otherwise no-protection mode is selected.
 */


static u32 mesh_set_ht_prot_mode(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;
	u16 ht_opmode;
	bool non_ht_sta = false, ht20_sta = false;

	switch (sdata->vif.bss_conf.chandef.width) {
	case NL80211_CHAN_WIDTH_20_NOHT:
	case NL80211_CHAN_WIDTH_5:
	case NL80211_CHAN_WIDTH_10:
		return 0;
	default:
		break;
	}

	rcu_read_lock();
	list_for_each_entry_rcu(sta, &local->sta_list, list) {
		if (sdata != sta->sdata ||
		    sta->mesh->plink_state != NL80211_PLINK_ESTAB)
			continue;

		if (sta->sta.bandwidth > IEEE80211_STA_RX_BW_20)
			continue;

		if (!sta->sta.ht_cap.ht_supported) {
			mpl_dbg(sdata, "nonHT sta (%pM) is present\n",
				       sta->sta.addr);
			non_ht_sta = true;
			break;
		}

		mpl_dbg(sdata, "HT20 sta (%pM) is present\n", sta->sta.addr);
		ht20_sta = true;
	}
	rcu_read_unlock();

	if (non_ht_sta)
		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED;
	else if (ht20_sta &&
		 sdata->vif.bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_20MHZ;
	else
		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONE;

	if (sdata->vif.bss_conf.ht_operation_mode == ht_opmode)
		return 0;

	sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
	sdata->u.mesh.mshcfg.ht_opmode = ht_opmode;
	mpl_dbg(sdata, "selected new HT protection mode %d\n", ht_opmode);
	return BSS_CHANGED_HT;
}

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static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
			       struct sta_info *sta,
			       enum ieee80211_self_protected_actioncode action,
			       u8 *da, u16 llid, u16 plid, u16 reason)
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	struct ieee80211_tx_info *info;
	struct ieee80211_mgmt *mgmt;
	bool include_plid = false;
	u16 peering_proto = 0;
	u8 *pos, ie_len = 4;
	int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.self_prot) +
		      sizeof(mgmt->u.action.u.self_prot);
	int err = -ENOMEM;

	skb = dev_alloc_skb(local->tx_headroom +
			    hdr_len +
			    2 + /* capability info */
			    2 + /* AID */
			    2 + 8 + /* supported rates */
			    2 + (IEEE80211_MAX_SUPP_RATES - 8) +
			    2 + sdata->u.mesh.mesh_id_len +
			    2 + sizeof(struct ieee80211_meshconf_ie) +
			    2 + sizeof(struct ieee80211_ht_cap) +
			    2 + sizeof(struct ieee80211_ht_operation) +
			    2 + sizeof(struct ieee80211_vht_cap) +
			    2 + sizeof(struct ieee80211_vht_operation) +
			    2 + 8 + /* peering IE */
			    sdata->u.mesh.ie_len);
	if (!skb)
		return err;
	info = IEEE80211_SKB_CB(skb);
	skb_reserve(skb, local->tx_headroom);
	mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
	memset(mgmt, 0, hdr_len);
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					  IEEE80211_STYPE_ACTION);
	memcpy(mgmt->da, da, ETH_ALEN);
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
	memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
	mgmt->u.action.category = WLAN_CATEGORY_SELF_PROTECTED;
	mgmt->u.action.u.self_prot.action_code = action;

	if (action != WLAN_SP_MESH_PEERING_CLOSE) {
		enum nl80211_band band = ieee80211_get_sdata_band(sdata);

		/* capability info */
		pos = skb_put(skb, 2);
		memset(pos, 0, 2);
		if (action == WLAN_SP_MESH_PEERING_CONFIRM) {
			/* AID */
			pos = skb_put(skb, 2);
			put_unaligned_le16(sta->sta.aid, pos);
		}
		if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
		    ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
		    mesh_add_rsn_ie(sdata, skb) ||
		    mesh_add_meshid_ie(sdata, skb) ||
		    mesh_add_meshconf_ie(sdata, skb))
			goto free;
	} else {	/* WLAN_SP_MESH_PEERING_CLOSE */
		info->flags |= IEEE80211_TX_CTL_NO_ACK;
		if (mesh_add_meshid_ie(sdata, skb))
			goto free;
	}

	/* Add Mesh Peering Management element */
	switch (action) {
	case WLAN_SP_MESH_PEERING_OPEN:
		break;
	case WLAN_SP_MESH_PEERING_CONFIRM:
		ie_len += 2;
		include_plid = true;
		break;
	case WLAN_SP_MESH_PEERING_CLOSE:
		if (plid) {
			ie_len += 2;
			include_plid = true;
		}
		ie_len += 2;	/* reason code */
		break;
	default:
		err = -EINVAL;
		goto free;
	}

	if (WARN_ON(skb_tailroom(skb) < 2 + ie_len))
		goto free;

	pos = skb_put(skb, 2 + ie_len);
	*pos++ = WLAN_EID_PEER_MGMT;
	*pos++ = ie_len;
	memcpy(pos, &peering_proto, 2);
	pos += 2;
	put_unaligned_le16(llid, pos);
	pos += 2;
	if (include_plid) {
		put_unaligned_le16(plid, pos);
		pos += 2;
	}
	if (action == WLAN_SP_MESH_PEERING_CLOSE) {
		put_unaligned_le16(reason, pos);
		pos += 2;
	}

	if (action != WLAN_SP_MESH_PEERING_CLOSE) {
		if (mesh_add_ht_cap_ie(sdata, skb) ||
		    mesh_add_ht_oper_ie(sdata, skb) ||
		    mesh_add_vht_cap_ie(sdata, skb) ||
		    mesh_add_vht_oper_ie(sdata, skb))
			goto free;
	}

	if (mesh_add_vendor_ies(sdata, skb))
		goto free;

	ieee80211_tx_skb(sdata, skb);
	return 0;
free:
	kfree_skb(skb);
	return err;
}

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/**
 * __mesh_plink_deactivate - deactivate mesh peer link
 *
 * @sta: mesh peer link to deactivate
 *
 * Mesh paths with this peer as next hop should be flushed
 * by the caller outside of plink_lock.
 *
 * Returns beacon changed flag if the beacon content changed.
 *
 * Locking: the caller must hold sta->mesh->plink_lock
 */


static u32 __mesh_plink_deactivate(struct sta_info *sta)
{
	struct ieee80211_sub_if_data *sdata = sta->sdata;
	u32 changed = 0;

	lockdep_assert_held(&sta->mesh->plink_lock);

	if (sta->mesh->plink_state == NL80211_PLINK_ESTAB)
		changed = mesh_plink_dec_estab_count(sdata);
	sta->mesh->plink_state = NL80211_PLINK_BLOCKED;

	ieee80211_mps_sta_status_update(sta);
	changed |= ieee80211_mps_set_sta_local_pm(sta,
			NL80211_MESH_POWER_UNKNOWN);

	return changed;
}

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/**
 * mesh_plink_deactivate - deactivate mesh peer link
 *
 * @sta: mesh peer link to deactivate
 *
 * All mesh paths with this peer as next hop will be flushed
 */


u32 mesh_plink_deactivate(struct sta_info *sta)
{
	struct ieee80211_sub_if_data *sdata = sta->sdata;
	u32 changed;

	spin_lock_bh(&sta->mesh->plink_lock);
	changed = __mesh_plink_deactivate(sta);

	if (!sdata->u.mesh.user_mpm) {
		sta->mesh->reason = WLAN_REASON_MESH_PEER_CANCELED;
		mesh_plink_frame_tx(sdata, sta, WLAN_SP_MESH_PEERING_CLOSE,
				    sta->sta.addr, sta->mesh->llid,
				    sta->mesh->plid, sta->mesh->reason);
	}
	spin_unlock_bh(&sta->mesh->plink_lock);
	if (!sdata->u.mesh.user_mpm)
		del_timer_sync(&sta->mesh->plink_timer);
	mesh_path_flush_by_nexthop(sta);

	/* make sure no readers can access nexthop sta from here on */
	synchronize_net();

	return changed;
}

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static void mesh_sta_info_init(struct ieee80211_sub_if_data *sdata,
			       struct sta_info *sta,
			       struct ieee802_11_elems *elems, bool insert)
{
	struct ieee80211_local *local = sdata->local;
	enum nl80211_band band = ieee80211_get_sdata_band(sdata);
	struct ieee80211_supported_band *sband;
	u32 rates, basic_rates = 0, changed = 0;
	enum ieee80211_sta_rx_bandwidth bw = sta->sta.bandwidth;

	sband = local->hw.wiphy->bands[band];
	rates = ieee80211_sta_get_rates(sdata, elems, band, &basic_rates);

	spin_lock_bh(&sta->mesh->plink_lock);
	sta->rx_stats.last_rx = jiffies;

	/* rates and capabilities don't change during peering */
	if (sta->mesh->plink_state == NL80211_PLINK_ESTAB &&
	    sta->mesh->processed_beacon)
		goto out;
	sta->mesh->processed_beacon = true;

	if (sta->sta.supp_rates[band] != rates)
		changed |= IEEE80211_RC_SUPP_RATES_CHANGED;
	sta->sta.supp_rates[band] = rates;

	if (ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
					      elems->ht_cap_elem, sta))
		changed |= IEEE80211_RC_BW_CHANGED;

	ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
					    elems->vht_cap_elem, sta);

	if (bw != sta->sta.bandwidth)
		changed |= IEEE80211_RC_BW_CHANGED;

	/* HT peer is operating 20MHz-only */
	if (elems->ht_operation &&
	    !(elems->ht_operation->ht_param &
	      IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
		if (sta->sta.bandwidth != IEEE80211_STA_RX_BW_20)
			changed |= IEEE80211_RC_BW_CHANGED;
		sta->sta.bandwidth = IEEE80211_STA_RX_BW_20;
	}

	if (insert)
		rate_control_rate_init(sta);
	else
		rate_control_rate_update(local, sband, sta, changed);
out:
	spin_unlock_bh(&sta->mesh->plink_lock);
}

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3
1.03%
1
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static int mesh_allocate_aid(struct ieee80211_sub_if_data *sdata)
{
	struct sta_info *sta;
	unsigned long *aid_map;
	int aid;

	aid_map = kcalloc(BITS_TO_LONGS(IEEE80211_MAX_AID + 1),
			  sizeof(*aid_map), GFP_KERNEL);
	if (!aid_map)
		return -ENOMEM;

	/* reserve aid 0 for mcast indication */
	__set_bit(0, aid_map);

	rcu_read_lock();
	list_for_each_entry_rcu(sta, &sdata->local->sta_list, list)
		__set_bit(sta->sta.aid, aid_map);
	rcu_read_unlock();

	aid = find_first_zero_bit(aid_map, IEEE80211_MAX_AID + 1);
	kfree(aid_map);

	if (aid > IEEE80211_MAX_AID)
		return -ENOBUFS;

	return aid;
}

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static struct sta_info *

__mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *hw_addr)
{
	struct sta_info *sta;
	int aid;

	if (sdata->local->num_sta >= MESH_MAX_PLINKS)
		return NULL;

	aid = mesh_allocate_aid(sdata);
	if (aid < 0)
		return NULL;

	sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL);
	if (!sta)
		return NULL;

	sta->mesh->plink_state = NL80211_PLINK_LISTEN;
	sta->sta.wme = true;
	sta->sta.aid = aid;

	sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
	sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
	sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);

	return sta;
}

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static struct sta_info *

mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *addr,
		    struct ieee802_11_elems *elems)
{
	struct sta_info *sta = NULL;

	/* Userspace handles station allocation */
	if (sdata->u.mesh.user_mpm ||
	    sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED) {
		if (mesh_peer_accepts_plinks(elems) &&
		    mesh_plink_availables(sdata))
			cfg80211_notify_new_peer_candidate(sdata->dev, addr,
							   elems->ie_start,
							   elems->total_len,
							   GFP_KERNEL);
	} else
		sta = __mesh_sta_info_alloc(sdata, addr);

	return sta;
}

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/*
 * mesh_sta_info_get - return mesh sta info entry for @addr.
 *
 * @sdata: local meshif
 * @addr: peer's address
 * @elems: IEs from beacon or mesh peering frame.
 *
 * Return existing or newly allocated sta_info under RCU read lock.
 * (re)initialize with given IEs.
 */

static struct sta_info *
mesh_sta_info_get(struct ieee80211_sub_if_data *sdata,
		  
u8 *addr, struct ieee802_11_elems *elems) __acquires(RCU)
{
	struct sta_info *sta = NULL;

	rcu_read_lock();
	sta = sta_info_get(sdata, addr);
	if (sta) {
		mesh_sta_info_init(sdata, sta, elems, false);
	} else {
		rcu_read_unlock();
		/* can't run atomic */
		sta = mesh_sta_info_alloc(sdata, addr, elems);
		if (!sta) {
			rcu_read_lock();
			return NULL;
		}

		mesh_sta_info_init(sdata, sta, elems, true);

		if (sta_info_insert_rcu(sta))
			return NULL;
	}

	return sta;
}

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Thomas Pedersen
117
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117
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4
100.00%

/*
 * mesh_neighbour_update - update or initialize new mesh neighbor.
 *
 * @sdata: local meshif
 * @addr: peer's address
 * @elems: IEs from beacon or mesh peering frame
 *
 * Initiates peering if appropriate.
 */


void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
			   u8 *hw_addr,
			   struct ieee802_11_elems *elems)
{
	struct sta_info *sta;
	u32 changed = 0;

	sta = mesh_sta_info_get(sdata, hw_addr, elems);
	if (!sta)
		goto out;

	if (mesh_peer_accepts_plinks(elems) &&
	    sta->mesh->plink_state == NL80211_PLINK_LISTEN &&
	    sdata->u.mesh.accepting_plinks &&
	    sdata->u.mesh.mshcfg.auto_open_plinks &&
	    rssi_threshold_check(sdata, sta))
		changed = mesh_plink_open(sta);

	ieee80211_mps_frame_release(sta, elems);
out:
	rcu_read_unlock();
	ieee80211_mbss_info_change_notify(sdata, changed);
}

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CommitProp
Thomas Pedersen
44
38.60%
6
35.29%
Luis Carlos Cobo Rus
40
35.09%
1
5.88%
Johannes Berg
11
9.65%
4
23.53%
Marco Porsch
7
6.14%
1
5.88%
Ashok Nagarajan
5
4.39%
2
11.76%
Javier Cardona
5
4.39%
2
11.76%
Bob Copeland
2
1.75%
1
5.88%
Total
114
100.00%
17
100.00%



static void mesh_plink_timer(unsigned long data)
{
	struct sta_info *sta;
	u16 reason = 0;
	struct ieee80211_sub_if_data *sdata;
	struct mesh_config *mshcfg;
	enum ieee80211_self_protected_actioncode action = 0;

	/*
         * This STA is valid because sta_info_destroy() will
         * del_timer_sync() this timer after having made sure
         * it cannot be readded (by deleting the plink.)
         */
	sta = (struct sta_info *) data;

	if (sta->sdata->local->quiescing)
		return;

	spin_lock_bh(&sta->mesh->plink_lock);

	/* If a timer fires just before a state transition on another CPU,
         * we may have already extended the timeout and changed state by the
         * time we've acquired the lock and arrived  here.  In that case,
         * skip this timer and wait for the new one.
         */
	if (time_before(jiffies, sta->mesh->plink_timer.expires)) {
		mpl_dbg(sta->sdata,
			"Ignoring timer for %pM in state %s (timer adjusted)",
			sta->sta.addr, mplstates[sta->mesh->plink_state]);
		spin_unlock_bh(&sta->mesh->plink_lock);
		return;
	}

	/* del_timer() and handler may race when entering these states */
	if (sta->mesh->plink_state == NL80211_PLINK_LISTEN ||
	    sta->mesh->plink_state == NL80211_PLINK_ESTAB) {
		mpl_dbg(sta->sdata,
			"Ignoring timer for %pM in state %s (timer deleted)",
			sta->sta.addr, mplstates[sta->mesh->plink_state]);
		spin_unlock_bh(&sta->mesh->plink_lock);
		return;
	}

	mpl_dbg(sta->sdata,
		"Mesh plink timer for %pM fired on state %s\n",
		sta->sta.addr, mplstates[sta->mesh->plink_state]);
	sdata = sta->sdata;
	mshcfg = &sdata->u.mesh.mshcfg;

	switch (sta->mesh->plink_state) {
	case NL80211_PLINK_OPN_RCVD:
	case NL80211_PLINK_OPN_SNT:
		/* retry timer */
		if (sta->mesh->plink_retries < mshcfg->dot11MeshMaxRetries) {
			u32 rand;
			mpl_dbg(sta->sdata,
				"Mesh plink for %pM (retry, timeout): %d %d\n",
				sta->sta.addr, sta->mesh->plink_retries,
				sta->mesh->plink_timeout);
			get_random_bytes(&rand, sizeof(u32));
			sta->mesh->plink_timeout = sta->mesh->plink_timeout +
					     rand % sta->mesh->plink_timeout;
			++sta->mesh->plink_retries;
			mod_plink_timer(sta, sta->mesh->plink_timeout);
			action = WLAN_SP_MESH_PEERING_OPEN;
			break;
		}
		reason = WLAN_REASON_MESH_MAX_RETRIES;
		/* fall through on else */
	case NL80211_PLINK_CNF_RCVD:
		/* confirm timer */
		if (!reason)
			reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT;
		sta->mesh->plink_state = NL80211_PLINK_HOLDING;
		mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
		action = WLAN_SP_MESH_PEERING_CLOSE;
		break;
	case NL80211_PLINK_HOLDING:
		/* holding timer */
		del_timer(&sta->mesh->plink_timer);
		mesh_plink_fsm_restart(sta);
		break;
	default:
		break;
	}
	spin_unlock_bh(&sta->mesh->plink_lock);
	if (action)
		mesh_plink_frame_tx(sdata, sta, action, sta->sta.addr,
				    sta->mesh->llid, sta->mesh->plid, reason);
}

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Luis Carlos Cobo Rus
208
47.60%
1
5.88%
Bob Copeland
83
18.99%
4
23.53%
Johannes Berg
73
16.70%
6
35.29%
Thomas Pedersen
41
9.38%
3
17.65%
Marco Porsch
20
4.58%
1
5.88%
Chun-Yeow Yeoh
7
1.60%
1
5.88%
Javier Cardona
5
1.14%
1
5.88%
Total
437
100.00%
17
100.00%



static inline void mesh_plink_timer_set(struct sta_info *sta, u32 timeout)
{
	sta->mesh->plink_timer.expires = jiffies