Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 111 insertions, 130 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 296620d6ca0..677d6592978 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -336,6 +336,20 @@ static void rate_idx_to_bitrate(struct rate_info *rate, struct sta_info *sta, in
 		rate->mcs = idx;
 }
 
+void sta_set_rate_info_tx(struct sta_info *sta,
+			  const struct ieee80211_tx_rate *rate,
+			  struct rate_info *rinfo)
+{
+	rinfo->flags = 0;
+	if (rate->flags & IEEE80211_TX_RC_MCS)
+		rinfo->flags |= RATE_INFO_FLAGS_MCS;
+	if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+		rinfo->flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
+	if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
+		rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
+	rate_idx_to_bitrate(rinfo, sta, rate->idx);
+}
+
 static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 {
 	struct ieee80211_sub_if_data *sdata = sta->sdata;
@@ -378,14 +392,7 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 		sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
 	}
 
-	sinfo->txrate.flags = 0;
-	if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)
-		sinfo->txrate.flags |= RATE_INFO_FLAGS_MCS;
-	if (sta->last_tx_rate.flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
-		sinfo->txrate.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
-	if (sta->last_tx_rate.flags & IEEE80211_TX_RC_SHORT_GI)
-		sinfo->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
-	rate_idx_to_bitrate(&sinfo->txrate, sta, sta->last_tx_rate.idx);
+	sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate);
 
 	sinfo->rxrate.flags = 0;
 	if (sta->last_rx_rate_flag & RX_FLAG_HT)
@@ -489,27 +496,13 @@ static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 	return ret;
 }
 
-static void ieee80211_config_ap_ssid(struct ieee80211_sub_if_data *sdata,
-				     struct beacon_parameters *params)
-{
-	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
-
-	bss_conf->ssid_len = params->ssid_len;
-
-	if (params->ssid_len)
-		memcpy(bss_conf->ssid, params->ssid, params->ssid_len);
-
-	bss_conf->hidden_ssid =
-		(params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
-}
-
 static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
-				    u8 *resp, size_t resp_len)
+				    const u8 *resp, size_t resp_len)
 {
 	struct sk_buff *new, *old;
 
 	if (!resp || !resp_len)
-		return -EINVAL;
+		return 1;
 
 	old = rtnl_dereference(sdata->u.ap.probe_resp);
 
@@ -520,50 +513,28 @@ static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
 	memcpy(skb_put(new, resp_len), resp, resp_len);
 
 	rcu_assign_pointer(sdata->u.ap.probe_resp, new);
-	synchronize_rcu();
-
-	if (old)
+	if (old) {
+		/* TODO: use call_rcu() */
+		synchronize_rcu();
 		dev_kfree_skb(old);
+	}
 
 	return 0;
 }
 
-/*
- * This handles both adding a beacon and setting new beacon info
- */
-static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
-				   struct beacon_parameters *params)
+static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
+				   struct cfg80211_beacon_data *params)
 {
 	struct beacon_data *new, *old;
 	int new_head_len, new_tail_len;
-	int size;
-	int err = -EINVAL;
-	u32 changed = 0;
+	int size, err;
+	u32 changed = BSS_CHANGED_BEACON;
 
 	old = rtnl_dereference(sdata->u.ap.beacon);
 
-	/* head must not be zero-length */
-	if (params->head && !params->head_len)
-		return -EINVAL;
-
-	/*
-	 * This is a kludge. beacon interval should really be part
-	 * of the beacon information.
-	 */
-	if (params->interval &&
-	    (sdata->vif.bss_conf.beacon_int != params->interval)) {
-		sdata->vif.bss_conf.beacon_int = params->interval;
-		ieee80211_bss_info_change_notify(sdata,
-						 BSS_CHANGED_BEACON_INT);
-	}
-
 	/* Need to have a beacon head if we don't have one yet */
 	if (!params->head && !old)
-		return err;
-
-	/* sorry, no way to start beaconing without dtim period */
-	if (!params->dtim_period && !old)
-		return err;
+		return -EINVAL;
 
 	/* new or old head? */
 	if (params->head)
@@ -586,12 +557,6 @@ static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
 
 	/* start filling the new info now */
 
-	/* new or old dtim period? */
-	if (params->dtim_period)
-		new->dtim_period = params->dtim_period;
-	else
-		new->dtim_period = old->dtim_period;
-
 	/*
 	 * pointers go into the block we allocated,
 	 * memory is | beacon_data | head | tail |
@@ -614,46 +579,37 @@ static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
 		if (old)
 			memcpy(new->tail, old->tail, new_tail_len);
 
-	sdata->vif.bss_conf.dtim_period = new->dtim_period;
-
-	rcu_assign_pointer(sdata->u.ap.beacon, new);
-
-	synchronize_rcu();
-
-	kfree(old);
-
 	err = ieee80211_set_probe_resp(sdata, params->probe_resp,
 				       params->probe_resp_len);
-	if (!err)
+	if (err < 0)
+		return err;
+	if (err == 0)
 		changed |= BSS_CHANGED_AP_PROBE_RESP;
 
-	ieee80211_config_ap_ssid(sdata, params);
-	changed |= BSS_CHANGED_BEACON_ENABLED |
-		   BSS_CHANGED_BEACON |
-		   BSS_CHANGED_SSID;
+	rcu_assign_pointer(sdata->u.ap.beacon, new);
 
-	ieee80211_bss_info_change_notify(sdata, changed);
-	return 0;
+	if (old)
+		kfree_rcu(old, rcu_head);
+
+	return changed;
 }
 
-static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
-				struct beacon_parameters *params)
+static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
+			      struct cfg80211_ap_settings *params)
 {
-	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct beacon_data *old;
 	struct ieee80211_sub_if_data *vlan;
-	int ret;
-
-	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	u32 changed = BSS_CHANGED_BEACON_INT |
+		      BSS_CHANGED_BEACON_ENABLED |
+		      BSS_CHANGED_BEACON |
+		      BSS_CHANGED_SSID;
+	int err;
 
 	old = rtnl_dereference(sdata->u.ap.beacon);
 	if (old)
 		return -EALREADY;
 
-	ret = ieee80211_config_beacon(sdata, params);
-	if (ret)
-		return ret;
-
 	/*
 	 * Apply control port protocol, this allows us to
 	 * not encrypt dynamic WEP control frames.
@@ -667,14 +623,32 @@ static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
 			params->crypto.control_port_no_encrypt;
 	}
 
+	sdata->vif.bss_conf.beacon_int = params->beacon_interval;
+	sdata->vif.bss_conf.dtim_period = params->dtim_period;
+
+	sdata->vif.bss_conf.ssid_len = params->ssid_len;
+	if (params->ssid_len)
+		memcpy(sdata->vif.bss_conf.ssid, params->ssid,
+		       params->ssid_len);
+	sdata->vif.bss_conf.hidden_ssid =
+		(params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
+
+	err = ieee80211_assign_beacon(sdata, &params->beacon);
+	if (err < 0)
+		return err;
+	changed |= err;
+
+	ieee80211_bss_info_change_notify(sdata, changed);
+
 	return 0;
 }
 
-static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
-				struct beacon_parameters *params)
+static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
+				   struct cfg80211_beacon_data *params)
 {
 	struct ieee80211_sub_if_data *sdata;
 	struct beacon_data *old;
+	int err;
 
 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
@@ -682,10 +656,14 @@ static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
 	if (!old)
 		return -ENOENT;
 
-	return ieee80211_config_beacon(sdata, params);
+	err = ieee80211_assign_beacon(sdata, params);
+	if (err < 0)
+		return err;
+	ieee80211_bss_info_change_notify(sdata, err);
+	return 0;
 }
 
-static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
+static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
 {
 	struct ieee80211_sub_if_data *sdata;
 	struct beacon_data *old;
@@ -697,10 +675,11 @@ static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
 		return -ENOENT;
 
 	RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
-	synchronize_rcu();
-	kfree(old);
+
+	kfree_rcu(old, rcu_head);
 
 	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
+
 	return 0;
 }
 
@@ -776,12 +755,10 @@ static int sta_apply_parameters(struct ieee80211_local *local,
 
 		if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 		    !test_sta_flag(sta, WLAN_STA_AUTH)) {
-			ret = sta_info_move_state_checked(sta,
-					IEEE80211_STA_AUTH);
+			ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 			if (ret)
 				return ret;
-			ret = sta_info_move_state_checked(sta,
-					IEEE80211_STA_ASSOC);
+			ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 			if (ret)
 				return ret;
 		}
@@ -789,11 +766,9 @@ static int sta_apply_parameters(struct ieee80211_local *local,
 
 	if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
 		if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
-			ret = sta_info_move_state_checked(sta,
-					IEEE80211_STA_AUTHORIZED);
+			ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
 		else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
-			ret = sta_info_move_state_checked(sta,
-					IEEE80211_STA_ASSOC);
+			ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 		if (ret)
 			return ret;
 	}
@@ -805,12 +780,10 @@ static int sta_apply_parameters(struct ieee80211_local *local,
 
 		if (!(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
 		    test_sta_flag(sta, WLAN_STA_AUTH)) {
-			ret = sta_info_move_state_checked(sta,
-					IEEE80211_STA_AUTH);
+			ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 			if (ret)
 				return ret;
-			ret = sta_info_move_state_checked(sta,
-					IEEE80211_STA_NONE);
+			ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
 			if (ret)
 				return ret;
 		}
@@ -944,8 +917,8 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 	if (!sta)
 		return -ENOMEM;
 
-	sta_info_move_state(sta, IEEE80211_STA_AUTH);
-	sta_info_move_state(sta, IEEE80211_STA_ASSOC);
+	sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
+	sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
 
 	err = sta_apply_parameters(local, sta, params);
 	if (err) {
@@ -1001,6 +974,7 @@ static int ieee80211_change_station(struct wiphy *wiphy,
 	struct ieee80211_local *local = wiphy_priv(wiphy);
 	struct sta_info *sta;
 	struct ieee80211_sub_if_data *vlansdata;
+	int err;
 
 	mutex_lock(&local->sta_mtx);
 
@@ -1040,7 +1014,11 @@ static int ieee80211_change_station(struct wiphy *wiphy,
 		ieee80211_send_layer2_update(sta);
 	}
 
-	sta_apply_parameters(local, sta, params);
+	err = sta_apply_parameters(local, sta, params);
+	if (err) {
+		mutex_unlock(&local->sta_mtx);
+		return err;
+	}
 
 	if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && params->supported_rates)
 		rate_control_rate_init(sta);
@@ -1341,6 +1319,16 @@ static int ieee80211_update_mesh_config(struct wiphy *wiphy,
 		conf->dot11MeshHWMPRannInterval =
 			nconf->dot11MeshHWMPRannInterval;
 	}
+	if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
+		conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
+	if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
+		/* our RSSI threshold implementation is supported only for
+		 * devices that report signal in dBm.
+		 */
+		if (!(sdata->local->hw.flags & IEEE80211_HW_SIGNAL_DBM))
+			return -ENOTSUPP;
+		conf->rssi_threshold = nconf->rssi_threshold;
+	}
 	return 0;
 }
 
@@ -1622,19 +1610,15 @@ static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
 }
 
 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
-			    struct cfg80211_deauth_request *req,
-			    void *cookie)
+			    struct cfg80211_deauth_request *req)
 {
-	return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev),
-				    req, cookie);
+	return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
 }
 
 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
-			      struct cfg80211_disassoc_request *req,
-			      void *cookie)
+			      struct cfg80211_disassoc_request *req)
 {
-	return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev),
-				      req, cookie);
+	return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
 }
 
 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
@@ -1868,7 +1852,6 @@ static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
 					 s32 rssi_thold, u32 rssi_hyst)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct ieee80211_vif *vif = &sdata->vif;
 	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 
@@ -1879,14 +1862,9 @@ static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
 	bss_conf->cqm_rssi_thold = rssi_thold;
 	bss_conf->cqm_rssi_hyst = rssi_hyst;
 
-	if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
-		if (sdata->vif.type != NL80211_IFTYPE_STATION)
-			return -EOPNOTSUPP;
-		return 0;
-	}
-
 	/* tell the driver upon association, unless already associated */
-	if (sdata->u.mgd.associated)
+	if (sdata->u.mgd.associated &&
+	    sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
 		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
 
 	return 0;
@@ -1907,8 +1885,11 @@ static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
 			return ret;
 	}
 
-	for (i = 0; i < IEEE80211_NUM_BANDS; i++)
+	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
 		sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
+		memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].mcs,
+		       sizeof(mask->control[i].mcs));
+	}
 
 	return 0;
 }
@@ -2030,7 +2011,7 @@ ieee80211_offchan_tx_done(struct ieee80211_work *wk, struct sk_buff *skb)
 	if (wk->offchan_tx.wait && !wk->offchan_tx.status)
 		cfg80211_mgmt_tx_status(wk->sdata->dev,
 					(unsigned long) wk->offchan_tx.frame,
-					wk->ie, wk->ie_len, false, GFP_KERNEL);
+					wk->data, wk->data_len, false, GFP_KERNEL);
 
 	return WORK_DONE_DESTROY;
 }
@@ -2181,8 +2162,8 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct net_device *dev,
 	wk->done = ieee80211_offchan_tx_done;
 	wk->offchan_tx.frame = skb;
 	wk->offchan_tx.wait = wait;
-	wk->ie_len = len;
-	memcpy(wk->ie, buf, len);
+	wk->data_len = len;
+	memcpy(wk->data, buf, len);
 
 	ieee80211_add_work(wk);
 	return 0;
@@ -2701,9 +2682,9 @@ struct cfg80211_ops mac80211_config_ops = {
 	.get_key = ieee80211_get_key,
 	.set_default_key = ieee80211_config_default_key,
 	.set_default_mgmt_key = ieee80211_config_default_mgmt_key,
-	.add_beacon = ieee80211_add_beacon,
-	.set_beacon = ieee80211_set_beacon,
-	.del_beacon = ieee80211_del_beacon,
+	.start_ap = ieee80211_start_ap,
+	.change_beacon = ieee80211_change_beacon,
+	.stop_ap = ieee80211_stop_ap,
 	.add_station = ieee80211_add_station,
 	.del_station = ieee80211_del_station,
 	.change_station = ieee80211_change_station,