1 files changed, 136 insertions, 109 deletions

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index b2cc1fda6cfd..239c4836a946 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -43,6 +43,8 @@ static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata,
 {
 	u16 auth_alg, auth_transaction, status_code;
 
+	lockdep_assert_held(&sdata->u.ibss.mtx);
+
 	if (len < 24 + 6)
 		return;
 
@@ -78,6 +80,8 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 	u32 bss_change;
 	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 
+	lockdep_assert_held(&ifibss->mtx);
+
 	/* Reset own TSF to allow time synchronization work. */
 	drv_reset_tsf(local);
 
@@ -169,14 +173,29 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 		memcpy(skb_put(skb, ifibss->ie_len),
 		       ifibss->ie, ifibss->ie_len);
 
+	if (local->hw.queues >= 4) {
+		pos = skb_put(skb, 9);
+		*pos++ = WLAN_EID_VENDOR_SPECIFIC;
+		*pos++ = 7; /* len */
+		*pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
+		*pos++ = 0x50;
+		*pos++ = 0xf2;
+		*pos++ = 2; /* WME */
+		*pos++ = 0; /* WME info */
+		*pos++ = 1; /* WME ver */
+		*pos++ = 0; /* U-APSD no in use */
+	}
+
 	rcu_assign_pointer(ifibss->presp, skb);
 
 	sdata->vif.bss_conf.beacon_int = beacon_int;
+	sdata->vif.bss_conf.basic_rates = basic_rates;
 	bss_change = BSS_CHANGED_BEACON_INT;
 	bss_change |= ieee80211_reset_erp_info(sdata);
 	bss_change |= BSS_CHANGED_BSSID;
 	bss_change |= BSS_CHANGED_BEACON;
 	bss_change |= BSS_CHANGED_BEACON_ENABLED;
+	bss_change |= BSS_CHANGED_BASIC_RATES;
 	bss_change |= BSS_CHANGED_IBSS;
 	sdata->vif.bss_conf.ibss_joined = true;
 	ieee80211_bss_info_change_notify(sdata, bss_change);
@@ -203,6 +222,8 @@ static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 	int i, j;
 	u16 beacon_int = cbss->beacon_interval;
 
+	lockdep_assert_held(&sdata->u.ibss.mtx);
+
 	if (beacon_int < 10)
 		beacon_int = 10;
 
@@ -258,37 +279,45 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 	if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
 		return;
 
-	if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
+	if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
 	    memcmp(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0) {
-		supp_rates = ieee80211_sta_get_rates(local, elems, band);
 
 		rcu_read_lock();
-
 		sta = sta_info_get(sdata, mgmt->sa);
-		if (sta) {
-			u32 prev_rates;
 
-			prev_rates = sta->sta.supp_rates[band];
-			/* make sure mandatory rates are always added */
-			sta->sta.supp_rates[band] = supp_rates |
-				ieee80211_mandatory_rates(local, band);
+		if (elems->supp_rates) {
+			supp_rates = ieee80211_sta_get_rates(local, elems,
+							     band);
+			if (sta) {
+				u32 prev_rates;
+
+				prev_rates = sta->sta.supp_rates[band];
+				/* make sure mandatory rates are always added */
+				sta->sta.supp_rates[band] = supp_rates |
+					ieee80211_mandatory_rates(local, band);
 
-			if (sta->sta.supp_rates[band] != prev_rates) {
+				if (sta->sta.supp_rates[band] != prev_rates) {
 #ifdef CONFIG_MAC80211_IBSS_DEBUG
-				printk(KERN_DEBUG "%s: updated supp_rates set "
-				    "for %pM based on beacon/probe_response "
-				    "(0x%x -> 0x%x)\n",
-				    sdata->name, sta->sta.addr,
-				    prev_rates, sta->sta.supp_rates[band]);
+					printk(KERN_DEBUG
+						"%s: updated supp_rates set "
+						"for %pM based on beacon"
+						"/probe_resp (0x%x -> 0x%x)\n",
+						sdata->name, sta->sta.addr,
+						prev_rates,
+						sta->sta.supp_rates[band]);
 #endif
-				rate_control_rate_init(sta);
-			}
-			rcu_read_unlock();
-		} else {
-			rcu_read_unlock();
-			ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa,
-					       supp_rates, GFP_KERNEL);
+					rate_control_rate_init(sta);
+				}
+			} else
+				sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid,
+						mgmt->sa, supp_rates,
+						GFP_ATOMIC);
 		}
+
+		if (sta && elems->wmm_info)
+			set_sta_flags(sta, WLAN_STA_WME);
+
+		rcu_read_unlock();
 	}
 
 	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
@@ -419,14 +448,15 @@ struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 		return NULL;
 
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
-	printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
-	       wiphy_name(local->hw.wiphy), addr, sdata->name);
+	wiphy_debug(local->hw.wiphy, "Adding new IBSS station %pM (dev=%s)\n",
+		    addr, sdata->name);
 #endif
 
 	sta = sta_info_alloc(sdata, addr, gfp);
 	if (!sta)
 		return NULL;
 
+	sta->last_rx = jiffies;
 	set_sta_flags(sta, WLAN_STA_AUTHORIZED);
 
 	/* make sure mandatory rates are always added */
@@ -447,6 +477,8 @@ static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
 	int active = 0;
 	struct sta_info *sta;
 
+	lockdep_assert_held(&sdata->u.ibss.mtx);
+
 	rcu_read_lock();
 
 	list_for_each_entry_rcu(sta, &local->sta_list, list) {
@@ -471,6 +503,8 @@ static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
 
+	lockdep_assert_held(&ifibss->mtx);
+
 	mod_timer(&ifibss->timer,
 		  round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
 
@@ -503,6 +537,8 @@ static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
 	u16 capability;
 	int i;
 
+	lockdep_assert_held(&ifibss->mtx);
+
 	if (ifibss->fixed_bssid) {
 		memcpy(bssid, ifibss->bssid, ETH_ALEN);
 	} else {
@@ -529,7 +565,7 @@ static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
 		sdata->drop_unencrypted = 0;
 
 	__ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int,
-				  ifibss->channel, 3, /* first two are basic */
+				  ifibss->channel, ifibss->basic_rates,
 				  capability, 0);
 }
 
@@ -547,6 +583,8 @@ static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
 	int active_ibss;
 	u16 capability;
 
+	lockdep_assert_held(&ifibss->mtx);
+
 	active_ibss = ieee80211_sta_active_ibss(sdata);
 #ifdef CONFIG_MAC80211_IBSS_DEBUG
 	printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
@@ -635,6 +673,8 @@ static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_mgmt *resp;
 	u8 *pos, *end;
 
+	lockdep_assert_held(&ifibss->mtx);
+
 	if (ifibss->state != IEEE80211_IBSS_MLME_JOINED ||
 	    len < 24 + 2 || !ifibss->presp)
 		return;
@@ -727,8 +767,8 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
 }
 
-static void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
-					  struct sk_buff *skb)
+void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+				   struct sk_buff *skb)
 {
 	struct ieee80211_rx_status *rx_status;
 	struct ieee80211_mgmt *mgmt;
@@ -738,6 +778,8 @@ static void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
 	mgmt = (struct ieee80211_mgmt *) skb->data;
 	fc = le16_to_cpu(mgmt->frame_control);
 
+	mutex_lock(&sdata->u.ibss.mtx);
+
 	switch (fc & IEEE80211_FCTL_STYPE) {
 	case IEEE80211_STYPE_PROBE_REQ:
 		ieee80211_rx_mgmt_probe_req(sdata, mgmt, skb->len);
@@ -755,35 +797,22 @@ static void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
 		break;
 	}
 
-	kfree_skb(skb);
+	mutex_unlock(&sdata->u.ibss.mtx);
 }
 
-static void ieee80211_ibss_work(struct work_struct *work)
+void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_sub_if_data *sdata =
-		container_of(work, struct ieee80211_sub_if_data, u.ibss.work);
-	struct ieee80211_local *local = sdata->local;
-	struct ieee80211_if_ibss *ifibss;
-	struct sk_buff *skb;
-
-	if (WARN_ON(local->suspended))
-		return;
-
-	if (!ieee80211_sdata_running(sdata))
-		return;
-
-	if (local->scanning)
-		return;
-
-	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_ADHOC))
-		return;
-	ifibss = &sdata->u.ibss;
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
 
-	while ((skb = skb_dequeue(&ifibss->skb_queue)))
-		ieee80211_ibss_rx_queued_mgmt(sdata, skb);
+	mutex_lock(&ifibss->mtx);
 
-	if (!test_and_clear_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request))
-		return;
+	/*
+	 * Work could be scheduled after scan or similar
+	 * when we aren't even joined (or trying) with a
+	 * network.
+	 */
+	if (!ifibss->ssid_len)
+		goto out;
 
 	switch (ifibss->state) {
 	case IEEE80211_IBSS_MLME_SEARCH:
@@ -796,6 +825,9 @@ static void ieee80211_ibss_work(struct work_struct *work)
 		WARN_ON(1);
 		break;
 	}
+
+ out:
+	mutex_unlock(&ifibss->mtx);
 }
 
 static void ieee80211_ibss_timer(unsigned long data)
@@ -810,8 +842,7 @@ static void ieee80211_ibss_timer(unsigned long data)
 		return;
 	}
 
-	set_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request);
-	ieee80211_queue_work(&local->hw, &ifibss->work);
+	ieee80211_queue_work(&local->hw, &sdata->work);
 }
 
 #ifdef CONFIG_PM
@@ -819,7 +850,6 @@ void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
 
-	cancel_work_sync(&ifibss->work);
 	if (del_timer_sync(&ifibss->timer))
 		ifibss->timer_running = true;
 }
@@ -839,10 +869,9 @@ void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
 
-	INIT_WORK(&ifibss->work, ieee80211_ibss_work);
 	setup_timer(&ifibss->timer, ieee80211_ibss_timer,
 		    (unsigned long) sdata);
-	skb_queue_head_init(&ifibss->skb_queue);
+	mutex_init(&ifibss->mtx);
 }
 
 /* scan finished notification */
@@ -856,45 +885,28 @@ void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local)
 			continue;
 		if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
 			continue;
-		if (!sdata->u.ibss.ssid_len)
-			continue;
 		sdata->u.ibss.last_scan_completed = jiffies;
-		mod_timer(&sdata->u.ibss.timer, 0);
+		ieee80211_queue_work(&local->hw, &sdata->work);
 	}
 	mutex_unlock(&local->iflist_mtx);
 }
 
-ieee80211_rx_result
-ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
-{
-	struct ieee80211_local *local = sdata->local;
-	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_PROBE_RESP:
-	case IEEE80211_STYPE_BEACON:
-	case IEEE80211_STYPE_PROBE_REQ:
-	case IEEE80211_STYPE_AUTH:
-		skb_queue_tail(&sdata->u.ibss.skb_queue, skb);
-		ieee80211_queue_work(&local->hw, &sdata->u.ibss.work);
-		return RX_QUEUED;
-	}
-
-	return RX_DROP_MONITOR;
-}
-
 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 			struct cfg80211_ibss_params *params)
 {
 	struct sk_buff *skb;
 
+	skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom +
+			    36 /* bitrates */ +
+			    34 /* SSID */ +
+			    3  /* DS params */ +
+			    4  /* IBSS params */ +
+			    params->ie_len);
+	if (!skb)
+		return -ENOMEM;
+
+	mutex_lock(&sdata->u.ibss.mtx);
+
 	if (params->bssid) {
 		memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN);
 		sdata->u.ibss.fixed_bssid = true;
@@ -902,6 +914,7 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 		sdata->u.ibss.fixed_bssid = false;
 
 	sdata->u.ibss.privacy = params->privacy;
+	sdata->u.ibss.basic_rates = params->basic_rates;
 
 	sdata->vif.bss_conf.beacon_int = params->beacon_interval;
 
@@ -922,34 +935,20 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 			sdata->u.ibss.ie_len = params->ie_len;
 	}
 
-	skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom +
-			    36 /* bitrates */ +
-			    34 /* SSID */ +
-			    3  /* DS params */ +
-			    4  /* IBSS params */ +
-			    params->ie_len);
-	if (!skb)
-		return -ENOMEM;
-
 	sdata->u.ibss.skb = skb;
 	sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH;
 	sdata->u.ibss.ibss_join_req = jiffies;
 
 	memcpy(sdata->u.ibss.ssid, params->ssid, IEEE80211_MAX_SSID_LEN);
-
-	/*
-	 * The ssid_len setting below is used to see whether
-	 * we are active, and we need all other settings
-	 * before that may get visible.
-	 */
-	mb();
-
 	sdata->u.ibss.ssid_len = params->ssid_len;
 
+	mutex_unlock(&sdata->u.ibss.mtx);
+
+	mutex_lock(&sdata->local->mtx);
 	ieee80211_recalc_idle(sdata->local);
+	mutex_unlock(&sdata->local->mtx);
 
-	set_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request);
-	ieee80211_queue_work(&sdata->local->hw, &sdata->u.ibss.work);
+	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
 
 	return 0;
 }
@@ -957,11 +956,33 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
 {
 	struct sk_buff *skb;
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+	struct ieee80211_local *local = sdata->local;
+	struct cfg80211_bss *cbss;
+	u16 capability;
+	int active_ibss;
 
-	del_timer_sync(&sdata->u.ibss.timer);
-	clear_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request);
-	cancel_work_sync(&sdata->u.ibss.work);
-	clear_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request);
+	mutex_lock(&sdata->u.ibss.mtx);
+
+	active_ibss = ieee80211_sta_active_ibss(sdata);
+
+	if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) {
+		capability = WLAN_CAPABILITY_IBSS;
+
+		if (ifibss->privacy)
+			capability |= WLAN_CAPABILITY_PRIVACY;
+
+		cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->channel,
+					ifibss->bssid, ifibss->ssid,
+					ifibss->ssid_len, WLAN_CAPABILITY_IBSS |
+					WLAN_CAPABILITY_PRIVACY,
+					capability);
+
+		if (cbss) {
+			cfg80211_unlink_bss(local->hw.wiphy, cbss);
+			cfg80211_put_bss(cbss);
+		}
+	}
 
 	sta_info_flush(sdata->local, sdata);
 
@@ -975,11 +996,17 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
 	synchronize_rcu();
 	kfree_skb(skb);
 
-	skb_queue_purge(&sdata->u.ibss.skb_queue);
+	skb_queue_purge(&sdata->skb_queue);
 	memset(sdata->u.ibss.bssid, 0, ETH_ALEN);
 	sdata->u.ibss.ssid_len = 0;
 
+	del_timer_sync(&sdata->u.ibss.timer);
+
+	mutex_unlock(&sdata->u.ibss.mtx);
+
+	mutex_lock(&local->mtx);
 	ieee80211_recalc_idle(sdata->local);
+	mutex_unlock(&local->mtx);
 
 	return 0;
 }