Commit df323818 authored by Marco Porsch's avatar Marco Porsch Committed by John W. Linville
Browse files

mac80211: fix unnecessary beacon update after peering status change 



ieee80211_bss_info_change_notify is called everytime a peer link is established
or closed, because the accepting_plinks flag in the meshconf IE *might* have changed.

With this patch the corresponding functions return the BSS_CHANGED_BEACON flag when a beacon update is necessary.

Also it makes mesh_accept_plinks_update the common place to update the accepting_plinks flag.
mesh_accept_plinks_update is called upon plink change and also periodically from ieee80211_mesh_housekeeping.
Thus, it also picks up changes of local->num_sta.

Signed-off-by: default avatarMarco Porsch <marco.porsch@etit.tu-chemnitz.de>
Acked-by: default avatarThomas Pedersen <thomas@cozybit.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent faa97bd4

net/mac80211/mesh.c

+13 −8
Original line number Diff line number Diff line
@@ -136,10 +136,13 @@ bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) 
 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons

 *

 * @sdata: mesh interface in which mesh beacons are going to be updated

 *

 * Returns: beacon changed flag if the beacon content changed.

 */

void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)

u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)

{

	bool free_plinks;

	u32 changed = 0;



	/* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,

	 * the mesh interface might be able to establish plinks with peers that
@@ -149,8 +152,12 @@ void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) 
	 */

	free_plinks = mesh_plink_availables(sdata);



	if (free_plinks != sdata->u.mesh.accepting_plinks)

		ieee80211_mesh_housekeeping_timer((unsigned long) sdata);

	if (free_plinks != sdata->u.mesh.accepting_plinks) {

		sdata->u.mesh.accepting_plinks = free_plinks;

		changed = BSS_CHANGED_BEACON;

	}



	return changed;

}



int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
@@ -262,7 +269,6 @@ mesh_add_meshconf_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) 
	neighbors = (neighbors > 15) ? 15 : neighbors;

	*pos++ = neighbors << 1;

	/* Mesh capability */

	ifmsh->accepting_plinks = mesh_plink_availables(sdata);

	*pos = MESHCONF_CAPAB_FORWARDING;

	*pos |= ifmsh->accepting_plinks ?

	    MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
@@ -521,14 +527,13 @@ int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, 
static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,

			   struct ieee80211_if_mesh *ifmsh)

{

	bool free_plinks;

	u32 changed;



	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);

	changed = mesh_accept_plinks_update(sdata);

	ieee80211_bss_info_change_notify(sdata, changed);



	mod_timer(&ifmsh->housekeeping_timer,

		  round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL));

net/mac80211/mesh.h

+1 −1
Original line number Diff line number Diff line
@@ -282,7 +282,7 @@ 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);

void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);

u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);

void mesh_plink_broken(struct sta_info *sta);

void mesh_plink_deactivate(struct sta_info *sta);

int mesh_plink_open(struct sta_info *sta);

net/mac80211/mesh_plink.c

+19 −25
Original line number Diff line number Diff line
@@ -48,17 +48,17 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, 
		u8 *da, __le16 llid, __le16 plid, __le16 reason);



static inline

void mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)

u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)

{

	atomic_inc(&sdata->u.mesh.mshstats.estab_plinks);

	mesh_accept_plinks_update(sdata);

	return mesh_accept_plinks_update(sdata);

}



static inline

void mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)

u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)

{

	atomic_dec(&sdata->u.mesh.mshstats.estab_plinks);

	mesh_accept_plinks_update(sdata);

	return mesh_accept_plinks_update(sdata);

}



/**
@@ -170,22 +170,21 @@ out: 
 * @sta: mesh peer link to deactivate

 *

 * All mesh paths with this peer as next hop will be flushed

 * Returns beacon changed flag if the beacon content changed.

 *

 * Locking: the caller must hold sta->lock

 */

static bool __mesh_plink_deactivate(struct sta_info *sta)

static u32 __mesh_plink_deactivate(struct sta_info *sta)

{

	struct ieee80211_sub_if_data *sdata = sta->sdata;

	bool deactivated = false;

	u32 changed = 0;



	if (sta->plink_state == NL80211_PLINK_ESTAB) {

		mesh_plink_dec_estab_count(sdata);

		deactivated = true;

	}

	if (sta->plink_state == NL80211_PLINK_ESTAB)

		changed = mesh_plink_dec_estab_count(sdata);

	sta->plink_state = NL80211_PLINK_BLOCKED;

	mesh_path_flush_by_nexthop(sta);



	return deactivated;

	return changed;

}



/**
@@ -198,18 +197,17 @@ static bool __mesh_plink_deactivate(struct sta_info *sta) 
void mesh_plink_deactivate(struct sta_info *sta)

{

	struct ieee80211_sub_if_data *sdata = sta->sdata;

	bool deactivated;

	u32 changed;



	spin_lock_bh(&sta->lock);

	deactivated = __mesh_plink_deactivate(sta);

	changed = __mesh_plink_deactivate(sta);

	sta->reason = cpu_to_le16(WLAN_REASON_MESH_PEER_CANCELED);

	mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,

			    sta->sta.addr, sta->llid, sta->plid,

			    sta->reason);

	spin_unlock_bh(&sta->lock);



	if (deactivated)

		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);

	ieee80211_bss_info_change_notify(sdata, changed);

}



static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
@@ -541,15 +539,14 @@ int mesh_plink_open(struct sta_info *sta) 
void mesh_plink_block(struct sta_info *sta)

{

	struct ieee80211_sub_if_data *sdata = sta->sdata;

	bool deactivated;

	u32 changed;



	spin_lock_bh(&sta->lock);

	deactivated = __mesh_plink_deactivate(sta);

	changed = __mesh_plink_deactivate(sta);

	sta->plink_state = NL80211_PLINK_BLOCKED;

	spin_unlock_bh(&sta->lock);



	if (deactivated)

		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);

	ieee80211_bss_info_change_notify(sdata, changed);

}
@@ -852,9 +849,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m 
			del_timer(&sta->plink_timer);

			sta->plink_state = NL80211_PLINK_ESTAB;

			spin_unlock_bh(&sta->lock);

			mesh_plink_inc_estab_count(sdata);

			changed |= mesh_plink_inc_estab_count(sdata);

			changed |= mesh_set_ht_prot_mode(sdata);

			changed |= BSS_CHANGED_BEACON;

			mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",

				sta->sta.addr);

			break;
@@ -888,9 +884,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m 
			del_timer(&sta->plink_timer);

			sta->plink_state = NL80211_PLINK_ESTAB;

			spin_unlock_bh(&sta->lock);

			mesh_plink_inc_estab_count(sdata);

			changed |= mesh_plink_inc_estab_count(sdata);

			changed |= mesh_set_ht_prot_mode(sdata);

			changed |= BSS_CHANGED_BEACON;

			mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",

				sta->sta.addr);

			mesh_plink_frame_tx(sdata,
@@ -908,13 +903,12 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m 
		case CLS_ACPT:

			reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);

			sta->reason = reason;

			__mesh_plink_deactivate(sta);

			changed |= __mesh_plink_deactivate(sta);

			sta->plink_state = NL80211_PLINK_HOLDING;

			llid = sta->llid;

			mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));

			spin_unlock_bh(&sta->lock);

			changed |= mesh_set_ht_prot_mode(sdata);

			changed |= BSS_CHANGED_BEACON;

			mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,

					    sta->sta.addr, llid, plid, reason);

			break;

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