From: Marco Porsch Date: Wed, 8 Aug 2012 05:58:43 +0000 (+0200) Subject: mac80211: fix unnecessary beacon update after peering status change X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=df32381896f5f0c78a371df2e49ab7c776b1a5ba;p=openwrt%2Fstaging%2Fblogic.git 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: Marco Porsch Acked-by: Thomas Pedersen Signed-off-by: John W. Linville --- diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c index 6fac18c0423f..856dcf49ce75 100644 --- a/net/mac80211/mesh.c +++ b/net/mac80211/mesh.c @@ -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)); diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h index faaa39bcfd10..13fd5b5fdb0a 100644 --- a/net/mac80211/mesh.h +++ b/net/mac80211/mesh.h @@ -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); diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c index af671b984df3..f20e9f26d137 100644 --- a/net/mac80211/mesh_plink.c +++ b/net/mac80211/mesh_plink.c @@ -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;