Merge commit 'wireless/master'

9 files changed, 194 insertions, 58 deletions

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 00562a8b99cf..915d04323a32 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -591,19 +591,6 @@ static void ieee80211_set_multicast_list(struct net_device *dev)
 	dev_mc_sync(local->mdev, dev);
 }
 
-static void ieee80211_if_setup(struct net_device *dev)
-{
-	ether_setup(dev);
-	dev->hard_start_xmit = ieee80211_subif_start_xmit;
-	dev->wireless_handlers = &ieee80211_iw_handler_def;
-	dev->set_multicast_list = ieee80211_set_multicast_list;
-	dev->change_mtu = ieee80211_change_mtu;
-	dev->open = ieee80211_open;
-	dev->stop = ieee80211_stop;
-	dev->destructor = free_netdev;
-	/* we will validate the address ourselves in ->open */
-	dev->validate_addr = NULL;
-}
 /*
  * Called when the netdev is removed or, by the code below, before
  * the interface type changes.
@@ -671,6 +658,34 @@ static void ieee80211_teardown_sdata(struct net_device *dev)
 	WARN_ON(flushed);
 }
 
+static const struct net_device_ops ieee80211_dataif_ops = {
+	.ndo_open		= ieee80211_open,
+	.ndo_stop		= ieee80211_stop,
+	.ndo_uninit		= ieee80211_teardown_sdata,
+	.ndo_start_xmit		= ieee80211_subif_start_xmit,
+	.ndo_set_multicast_list = ieee80211_set_multicast_list,
+	.ndo_change_mtu 	= ieee80211_change_mtu,
+	.ndo_set_mac_address 	= eth_mac_addr,
+};
+
+static const struct net_device_ops ieee80211_monitorif_ops = {
+	.ndo_open		= ieee80211_open,
+	.ndo_stop		= ieee80211_stop,
+	.ndo_uninit		= ieee80211_teardown_sdata,
+	.ndo_start_xmit		= ieee80211_monitor_start_xmit,
+	.ndo_set_multicast_list = ieee80211_set_multicast_list,
+	.ndo_change_mtu 	= ieee80211_change_mtu,
+	.ndo_set_mac_address 	= eth_mac_addr,
+};
+
+static void ieee80211_if_setup(struct net_device *dev)
+{
+	ether_setup(dev);
+	dev->netdev_ops = &ieee80211_dataif_ops;
+	dev->wireless_handlers = &ieee80211_iw_handler_def;
+	dev->destructor = free_netdev;
+}
+
 /*
  * Helper function to initialise an interface to a specific type.
  */
@@ -682,7 +697,7 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
 
 	/* and set some type-dependent values */
 	sdata->vif.type = type;
-	sdata->dev->hard_start_xmit = ieee80211_subif_start_xmit;
+	sdata->dev->netdev_ops = &ieee80211_dataif_ops;
 	sdata->wdev.iftype = type;
 
 	/* only monitor differs */
@@ -703,7 +718,7 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
 		break;
 	case NL80211_IFTYPE_MONITOR:
 		sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
-		sdata->dev->hard_start_xmit = ieee80211_monitor_start_xmit;
+		sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
 		sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
 				      MONITOR_FLAG_OTHER_BSS;
 		break;
@@ -809,8 +824,6 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 	if (ret)
 		goto fail;
 
-	ndev->uninit = ieee80211_teardown_sdata;
-
 	if (ieee80211_vif_is_mesh(&sdata->vif) &&
 	    params && params->mesh_id_len)
 		ieee80211_sdata_set_mesh_id(sdata,
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index a109c06e8e4e..caf92424c76d 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -791,6 +791,23 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 }
 EXPORT_SYMBOL(ieee80211_alloc_hw);
 
+static const struct net_device_ops ieee80211_master_ops = {
+	.ndo_start_xmit = ieee80211_master_start_xmit,
+	.ndo_open = ieee80211_master_open,
+	.ndo_stop = ieee80211_master_stop,
+	.ndo_set_multicast_list = ieee80211_master_set_multicast_list,
+	.ndo_select_queue = ieee80211_select_queue,
+};
+
+static void ieee80211_master_setup(struct net_device *mdev)
+{
+	mdev->type = ARPHRD_IEEE80211;
+	mdev->netdev_ops = &ieee80211_master_ops;
+	mdev->header_ops = &ieee80211_header_ops;
+	mdev->tx_queue_len = 1000;
+	mdev->addr_len = ETH_ALEN;
+}
+
 int ieee80211_register_hw(struct ieee80211_hw *hw)
 {
 	struct ieee80211_local *local = hw_to_local(hw);
@@ -840,7 +857,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 		hw->ampdu_queues = 0;
 
 	mdev = alloc_netdev_mq(sizeof(struct ieee80211_master_priv),
-			       "wmaster%d", ether_setup,
+			       "wmaster%d", ieee80211_master_setup,
 			       ieee80211_num_queues(hw));
 	if (!mdev)
 		goto fail_mdev_alloc;
@@ -851,13 +868,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 
 	ieee80211_rx_bss_list_init(local);
 
-	mdev->hard_start_xmit = ieee80211_master_start_xmit;
-	mdev->open = ieee80211_master_open;
-	mdev->stop = ieee80211_master_stop;
-	mdev->type = ARPHRD_IEEE80211;
-	mdev->header_ops = &ieee80211_header_ops;
-	mdev->set_multicast_list = ieee80211_master_set_multicast_list;
-
 	local->hw.workqueue =
 		create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
 	if (!local->hw.workqueue) {
@@ -884,7 +894,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 	local->hw.conf.listen_interval = local->hw.max_listen_interval;
 
 	local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
-						  IEEE80211_HW_SIGNAL_DB |
 						  IEEE80211_HW_SIGNAL_DBM) ?
 			       IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
 	local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
@@ -924,8 +933,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 		goto fail_wep;
 	}
 
-	local->mdev->select_queue = ieee80211_select_queue;
-
 	/* add one default STA interface if supported */
 	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
 		result = ieee80211_if_add(local, "wlan%d", NULL,
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 9d51e278c1e5..57967d32e5fd 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1042,6 +1042,7 @@ static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_local *local = sdata->local;
 	struct sta_info *sta;
 	int disassoc;
+	bool remove_bss = false;
 
 	/* TODO: start monitoring current AP signal quality and number of
 	 * missed beacons. Scan other channels every now and then and search
@@ -1067,6 +1068,7 @@ static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
 				       "range\n",
 				       sdata->dev->name, ifsta->bssid);
 				disassoc = 1;
+				remove_bss = true;
 			} else
 				ieee80211_send_probe_req(sdata, ifsta->bssid,
 							 ifsta->ssid,
@@ -1086,12 +1088,24 @@ static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
 
 	rcu_read_unlock();
 
-	if (disassoc)
+	if (disassoc) {
 		ieee80211_set_disassoc(sdata, ifsta, true, true,
 					WLAN_REASON_PREV_AUTH_NOT_VALID);
-	else
+		if (remove_bss) {
+			struct ieee80211_bss *bss;
+
+			bss = ieee80211_rx_bss_get(local, ifsta->bssid,
+					local->hw.conf.channel->center_freq,
+					ifsta->ssid, ifsta->ssid_len);
+			if (bss) {
+				atomic_dec(&bss->users);
+				ieee80211_rx_bss_put(local, bss);
+			}
+		}
+	} else {
 		mod_timer(&ifsta->timer, jiffies +
 				      IEEE80211_MONITORING_INTERVAL);
+	}
 }
 
 
@@ -1503,13 +1517,22 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 				   struct ieee80211_bss *bss)
 {
 	struct ieee80211_local *local = sdata->local;
-	int res, rates, i, j;
+	int res = 0, rates, i, j;
 	struct sk_buff *skb;
 	struct ieee80211_mgmt *mgmt;
 	u8 *pos;
 	struct ieee80211_supported_band *sband;
 	union iwreq_data wrqu;
 
+	if (local->ops->reset_tsf) {
+		/* Reset own TSF to allow time synchronization work. */
+		local->ops->reset_tsf(local_to_hw(local));
+	}
+
+	if ((ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) &&
+	   memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) == 0)
+		return res;
+
 	skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
 			    sdata->u.sta.ie_proberesp_len);
 	if (!skb) {
@@ -1520,13 +1543,11 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 
 	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 
-	/* Remove possible STA entries from other IBSS networks. */
-	sta_info_flush_delayed(sdata);
-
-	if (local->ops->reset_tsf) {
-		/* Reset own TSF to allow time synchronization work. */
-		local->ops->reset_tsf(local_to_hw(local));
+	if (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) {
+		/* Remove possible STA entries from other IBSS networks. */
+		sta_info_flush_delayed(sdata);
 	}
+
 	memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
 	res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
 	if (res)
@@ -2415,8 +2436,10 @@ static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
 							 ifsta->ssid_len);
 			ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
 			set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
-		} else
+		} else {
+			ifsta->assoc_scan_tries = 0;
 			ifsta->state = IEEE80211_STA_MLME_DISABLED;
+		}
 	}
 	return -1;
 }
@@ -2720,9 +2743,8 @@ void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
 
 	if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
 		ifsta = &sdata->u.sta;
-		if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
-		    (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
-		    !ieee80211_sta_active_ibss(sdata)))
+		if ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
+		    !ieee80211_sta_active_ibss(sdata))
 			ieee80211_sta_find_ibss(sdata, ifsta);
 	}
 
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 19ffc8ef1d1d..8e8ddbfcd236 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -86,8 +86,7 @@ ieee80211_rx_radiotap_len(struct ieee80211_local *local,
 
 	if (status->flag & RX_FLAG_TSFT)
 		len += 8;
-	if (local->hw.flags & IEEE80211_HW_SIGNAL_DB ||
-	    local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
+	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 		len += 1;
 	if (local->hw.flags & IEEE80211_HW_NOISE_DBM)
 		len += 1;
@@ -199,14 +198,6 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
 	*pos = status->antenna;
 	pos++;
 
-	/* IEEE80211_RADIOTAP_DB_ANTSIGNAL */
-	if (local->hw.flags & IEEE80211_HW_SIGNAL_DB) {
-		*pos = status->signal;
-		rthdr->it_present |=
-			cpu_to_le32(1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL);
-		pos++;
-	}
-
 	/* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
 
 	/* IEEE80211_RADIOTAP_RX_FLAGS */
@@ -1225,12 +1216,12 @@ ieee80211_data_to_8023(struct ieee80211_rx_data *rx)
 
 	switch (hdr->frame_control &
 		cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
-	case __constant_cpu_to_le16(IEEE80211_FCTL_TODS):
+	case cpu_to_le16(IEEE80211_FCTL_TODS):
 		if (unlikely(sdata->vif.type != NL80211_IFTYPE_AP &&
 			     sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
 			return -1;
 		break;
-	case __constant_cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
+	case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
 		if (unlikely(sdata->vif.type != NL80211_IFTYPE_WDS &&
 			     sdata->vif.type != NL80211_IFTYPE_MESH_POINT))
 			return -1;
@@ -1244,13 +1235,13 @@ ieee80211_data_to_8023(struct ieee80211_rx_data *rx)
 			}
 		}
 		break;
-	case __constant_cpu_to_le16(IEEE80211_FCTL_FROMDS):
+	case cpu_to_le16(IEEE80211_FCTL_FROMDS):
 		if (sdata->vif.type != NL80211_IFTYPE_STATION ||
 		    (is_multicast_ether_addr(dst) &&
 		     !compare_ether_addr(src, dev->dev_addr)))
 			return -1;
 		break;
-	case __constant_cpu_to_le16(0):
+	case cpu_to_le16(0):
 		if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
 			return -1;
 		break;
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 7b013fb0d27f..f1c726d94f47 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1433,10 +1433,31 @@ int ieee80211_monitor_start_xmit(struct sk_buff *skb,
 				 struct net_device *dev)
 {
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_channel *chan = local->hw.conf.channel;
 	struct ieee80211_radiotap_header *prthdr =
 		(struct ieee80211_radiotap_header *)skb->data;
 	u16 len_rthdr;
 
+	/*
+	 * Frame injection is not allowed if beaconing is not allowed
+	 * or if we need radar detection. Beaconing is usually not allowed when
+	 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
+	 * Passive scan is also used in world regulatory domains where
+	 * your country is not known and as such it should be treated as
+	 * NO TX unless the channel is explicitly allowed in which case
+	 * your current regulatory domain would not have the passive scan
+	 * flag.
+	 *
+	 * Since AP mode uses monitor interfaces to inject/TX management
+	 * frames we can make AP mode the exception to this rule once it
+	 * supports radar detection as its implementation can deal with
+	 * radar detection by itself. We can do that later by adding a
+	 * monitor flag interfaces used for AP support.
+	 */
+	if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR |
+	     IEEE80211_CHAN_PASSIVE_SCAN)))
+		goto fail;
+
 	/* check for not even having the fixed radiotap header part */
 	if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
 		goto fail; /* too short to be possibly valid */
diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c
index 5c88b8246bbb..bad1cfbfdf18 100644
--- a/net/mac80211/wext.c
+++ b/net/mac80211/wext.c
@@ -173,8 +173,7 @@ static int ieee80211_ioctl_giwrange(struct net_device *dev,
 	range->num_encoding_sizes = 2;
 	range->max_encoding_tokens = NUM_DEFAULT_KEYS;
 
-	if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC ||
-	    local->hw.flags & IEEE80211_HW_SIGNAL_DB)
+	if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 		range->max_qual.level = local->hw.max_signal;
 	else if  (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 		range->max_qual.level = -110;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index e69da8d20474..d452396006ee 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2093,6 +2093,81 @@ static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
 
 #undef FILL_IN_MESH_PARAM_IF_SET
 
+static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
+{
+	struct sk_buff *msg;
+	void *hdr = NULL;
+	struct nlattr *nl_reg_rules;
+	unsigned int i;
+	int err = -EINVAL;
+
+	mutex_lock(&cfg80211_drv_mutex);
+
+	if (!cfg80211_regdomain)
+		goto out;
+
+	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+	if (!msg) {
+		err = -ENOBUFS;
+		goto out;
+	}
+
+	hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
+			     NL80211_CMD_GET_REG);
+	if (!hdr)
+		goto nla_put_failure;
+
+	NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
+		cfg80211_regdomain->alpha2);
+
+	nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
+	if (!nl_reg_rules)
+		goto nla_put_failure;
+
+	for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
+		struct nlattr *nl_reg_rule;
+		const struct ieee80211_reg_rule *reg_rule;
+		const struct ieee80211_freq_range *freq_range;
+		const struct ieee80211_power_rule *power_rule;
+
+		reg_rule = &cfg80211_regdomain->reg_rules[i];
+		freq_range = &reg_rule->freq_range;
+		power_rule = &reg_rule->power_rule;
+
+		nl_reg_rule = nla_nest_start(msg, i);
+		if (!nl_reg_rule)
+			goto nla_put_failure;
+
+		NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
+			reg_rule->flags);
+		NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
+			freq_range->start_freq_khz);
+		NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
+			freq_range->end_freq_khz);
+		NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
+			freq_range->max_bandwidth_khz);
+		NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
+			power_rule->max_antenna_gain);
+		NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
+			power_rule->max_eirp);
+
+		nla_nest_end(msg, nl_reg_rule);
+	}
+
+	nla_nest_end(msg, nl_reg_rules);
+
+	genlmsg_end(msg, hdr);
+	err = genlmsg_unicast(msg, info->snd_pid);
+	goto out;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	err = -EMSGSIZE;
+out:
+	mutex_unlock(&cfg80211_drv_mutex);
+	return err;
+}
+
 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
 {
 	struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
@@ -2333,6 +2408,12 @@ static struct genl_ops nl80211_ops[] = {
 		.flags = GENL_ADMIN_PERM,
 	},
 	{
+		.cmd = NL80211_CMD_GET_REG,
+		.doit = nl80211_get_reg,
+		.policy = nl80211_policy,
+		/* can be retrieved by unprivileged users */
+	},
+	{
 		.cmd = NL80211_CMD_SET_REG,
 		.doit = nl80211_set_reg,
 		.policy = nl80211_policy,
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index f643d3981102..2323644330cd 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -57,7 +57,7 @@ static u32 supported_bandwidths[] = {
 /* Central wireless core regulatory domains, we only need two,
  * the current one and a world regulatory domain in case we have no
  * information to give us an alpha2 */
-static const struct ieee80211_regdomain *cfg80211_regdomain;
+const struct ieee80211_regdomain *cfg80211_regdomain;
 
 /* We use this as a place for the rd structure built from the
  * last parsed country IE to rest until CRDA gets back to us with
diff --git a/net/wireless/reg.h b/net/wireless/reg.h
index eb1dd5bc9b27..fe8c83f34fb7 100644
--- a/net/wireless/reg.h
+++ b/net/wireless/reg.h
@@ -1,6 +1,8 @@
 #ifndef __NET_WIRELESS_REG_H
 #define __NET_WIRELESS_REG_H
 
+extern const struct ieee80211_regdomain *cfg80211_regdomain;
+
 bool is_world_regdom(const char *alpha2);
 bool reg_is_valid_request(const char *alpha2);