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2024-09-20 cf4ce59b3b70238352c7f1729f0f7223214828ad 
 kernel/net/mac80211/main.c
....@@ -1,17 +1,16 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Copyright 2002-2005, Instant802 Networks, Inc.
34  * Copyright 2005-2006, Devicescape Software, Inc.
45  * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
56  * Copyright 2013-2014  Intel Mobile Communications GmbH
67  * Copyright (C) 2017     Intel Deutschland GmbH
7
- *
8
- * This program is free software; you can redistribute it and/or modify
9
- * it under the terms of the GNU General Public License version 2 as
10
- * published by the Free Software Foundation.
8
+ * Copyright (C) 2018 - 2019 Intel Corporation
119  */
1210 
1311 #include <net/mac80211.h>
1412 #include <linux/module.h>
13
+#include <linux/fips.h>
1514 #include <linux/init.h>
1615 #include <linux/netdevice.h>
1716 #include <linux/types.h>
....@@ -65,6 +64,9 @@
6564 	if (local->fif_pspoll)
6665 		new_flags |= FIF_PSPOLL;
6766 
67
+	if (local->rx_mcast_action_reg)
68
+		new_flags |= FIF_MCAST_ACTION;
69
+
6870 	spin_lock_bh(&local->filter_lock);
6971 	changed_flags = local->filter_flags ^ new_flags;
7072 
....@@ -105,13 +107,15 @@
105107 		chandef.chan = local->tmp_channel;
106108 		chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
107109 		chandef.center_freq1 = chandef.chan->center_freq;
110
+		chandef.freq1_offset = chandef.chan->freq_offset;
108111 	} else
109112 		chandef = local->_oper_chandef;
110113 
111114 	WARN(!cfg80211_chandef_valid(&chandef),
112
-	     "control:%d MHz width:%d center: %d/%d MHz",
113
-	     chandef.chan->center_freq, chandef.width,
114
-	     chandef.center_freq1, chandef.center_freq2);
115
+	     "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
116
+	     chandef.chan->center_freq, chandef.chan->freq_offset,
117
+	     chandef.width, chandef.center_freq1, chandef.freq1_offset,
118
+	     chandef.center_freq2);
115119 
116120 	if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
117121 		local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
....@@ -146,6 +150,8 @@
146150 		if (!rcu_access_pointer(sdata->vif.chanctx_conf))
147151 			continue;
148152 		if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
153
+			continue;
154
+		if (sdata->vif.bss_conf.txpower == INT_MIN)
149155 			continue;
150156 		power = min(power, sdata->vif.bss_conf.txpower);
151157 	}
....@@ -353,11 +359,11 @@
353359 	sdata_lock(sdata);
354360 
355361 	/* Copy the addresses to the bss_conf list */
356
-	ifa = idev->ifa_list;
362
+	ifa = rtnl_dereference(idev->ifa_list);
357363 	while (ifa) {
358364 		if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
359365 			bss_conf->arp_addr_list[c] = ifa->ifa_address;
360
-		ifa = ifa->ifa_next;
366
+		ifa = rtnl_dereference(ifa->ifa_next);
361367 		c++;
362368 	}
363369 
....@@ -417,7 +423,20 @@
417423 	},
418424 	[NL80211_IFTYPE_STATION] = {
419425 		.tx = 0xffff,
426
+		/*
427
+		 * To support Pre Association Security Negotiation (PASN) while
428
+		 * already associated to one AP, allow user space to register to
429
+		 * Rx authentication frames, so that the user space logic would
430
+		 * be able to receive/handle authentication frames from a
431
+		 * different AP as part of PASN.
432
+		 * It is expected that user space would intelligently register
433
+		 * for Rx authentication frames, i.e., only when PASN is used
434
+		 * and configure a match filter only for PASN authentication
435
+		 * algorithm, as otherwise the MLME functionality of mac80211
436
+		 * would be broken.
437
+		 */
420438 		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
439
+			BIT(IEEE80211_STYPE_AUTH >> 4) |
421440 			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
422441 	},
423442 	[NL80211_IFTYPE_AP] = {
....@@ -477,6 +496,8 @@
477496 				IEEE80211_HT_CAP_MAX_AMSDU |
478497 				IEEE80211_HT_CAP_SGI_20 |
479498 				IEEE80211_HT_CAP_SGI_40 |
499
+				IEEE80211_HT_CAP_TX_STBC |
500
+				IEEE80211_HT_CAP_RX_STBC |
480501 				IEEE80211_HT_CAP_LDPC_CODING |
481502 				IEEE80211_HT_CAP_40MHZ_INTOLERANT),
482503 	.mcs = {
....@@ -560,7 +581,7 @@
560581 			WIPHY_FLAG_REPORTS_OBSS |
561582 			WIPHY_FLAG_OFFCHAN_TX;
562583 
563
-	if (ops->remain_on_channel)
584
+	if (!use_chanctx || ops->remain_on_channel)
564585 		wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
565586 
566587 	wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
....@@ -573,6 +594,12 @@
573594 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
574595 	wiphy_ext_feature_set(wiphy,
575596 			      NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
597
+	wiphy_ext_feature_set(wiphy,
598
+			      NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
599
+	wiphy_ext_feature_set(wiphy,
600
+			      NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
601
+	wiphy_ext_feature_set(wiphy,
602
+			      NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
576603 
577604 	if (!ops->hw_scan) {
578605 		wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
....@@ -610,6 +637,18 @@
610637 	local->ops = ops;
611638 	local->use_chanctx = use_chanctx;
612639 
640
+	/*
641
+	 * We need a bit of data queued to build aggregates properly, so
642
+	 * instruct the TCP stack to allow more than a single ms of data
643
+	 * to be queued in the stack. The value is a bit-shift of 1
644
+	 * second, so 7 is ~8ms of queued data. Only affects local TCP
645
+	 * sockets.
646
+	 * This is the default, anyhow - drivers may need to override it
647
+	 * for local reasons (longer buffers, longer completion time, or
648
+	 * similar).
649
+	 */
650
+	local->hw.tx_sk_pacing_shift = 7;
651
+
613652 	/* set up some defaults */
614653 	local->hw.queues = 1;
615654 	local->hw.max_rates = 1;
....@@ -626,6 +665,7 @@
626665 					 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
627666 	local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
628667 	local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
668
+	local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
629669 	local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
630670 	wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
631671 	wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
....@@ -649,6 +689,18 @@
649689 	spin_lock_init(&local->filter_lock);
650690 	spin_lock_init(&local->rx_path_lock);
651691 	spin_lock_init(&local->queue_stop_reason_lock);
692
+
693
+	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
694
+		INIT_LIST_HEAD(&local->active_txqs[i]);
695
+		spin_lock_init(&local->active_txq_lock[i]);
696
+		local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
697
+		local->aql_txq_limit_high[i] =
698
+			IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
699
+	}
700
+
701
+	local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
702
+	local->aql_threshold = IEEE80211_AQL_THRESHOLD;
703
+	atomic_set(&local->aql_total_pending_airtime, 0);
652704 
653705 	INIT_LIST_HEAD(&local->chanctx_list);
654706 	mutex_init(&local->chanctx_mtx);
....@@ -684,6 +736,10 @@
684736 	tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
685737 		     (unsigned long)local);
686738 
739
+	if (ops->wake_tx_queue)
740
+		tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
741
+			     (unsigned long)local);
742
+
687743 	tasklet_init(&local->tasklet,
688744 		     ieee80211_tasklet_handler,
689745 		     (unsigned long) local);
....@@ -708,8 +764,7 @@
708764 
709765 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
710766 {
711
-	bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
712
-			  IS_ERR(local->wep_rx_tfm));
767
+	bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
713768 	bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
714769 	int n_suites = 0, r = 0, w = 0;
715770 	u32 *suites;
....@@ -843,7 +898,6 @@
843898 	enum nl80211_band band;
844899 	int channels, max_bitrates;
845900 	bool supp_ht, supp_vht, supp_he;
846
-	netdev_features_t feature_whitelist;
847901 	struct cfg80211_chan_def dflt_chandef = {};
848902 
849903 	if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
....@@ -902,10 +956,7 @@
902956 	}
903957 
904958 	/* Only HW csum features are currently compatible with mac80211 */
905
-	feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
906
-			    NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
907
-			    NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
908
-	if (WARN_ON(hw->netdev_features & ~feature_whitelist))
959
+	if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
909960 		return -EINVAL;
910961 
911962 	if (hw->max_report_rates == 0)
....@@ -962,6 +1013,11 @@
9621013 
9631014 		if (!supp_he)
9641015 			supp_he = !!ieee80211_get_he_sta_cap(sband);
1016
+
1017
+		/* HT, VHT, HE require QoS, thus >= 4 queues */
1018
+		if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1019
+			    (supp_ht || supp_vht || supp_he)))
1020
+			return -EINVAL;
9651021 
9661022 		if (!sband->ht_cap.ht_supported)
9671023 			continue;
....@@ -1033,9 +1089,23 @@
10331089 		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
10341090 		if (hw->max_signal <= 0) {
10351091 			result = -EINVAL;
1036
-			goto fail_wiphy_register;
1092
+			goto fail_workqueue;
10371093 		}
10381094 	}
1095
+
1096
+	/* Mac80211 and therefore all drivers using SW crypto only
1097
+	 * are able to handle PTK rekeys and Extended Key ID.
1098
+	 */
1099
+	if (!local->ops->set_key) {
1100
+		wiphy_ext_feature_set(local->hw.wiphy,
1101
+				      NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1102
+		wiphy_ext_feature_set(local->hw.wiphy,
1103
+				      NL80211_EXT_FEATURE_EXT_KEY_ID);
1104
+	}
1105
+
1106
+	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1107
+		wiphy_ext_feature_set(local->hw.wiphy,
1108
+				      NL80211_EXT_FEATURE_DEL_IBSS_STA);
10391109 
10401110 	/*
10411111 	 * Calculate scan IE length -- we need this to alloc
....@@ -1088,7 +1158,7 @@
10881158 
10891159 	result = ieee80211_init_cipher_suites(local);
10901160 	if (result < 0)
1091
-		goto fail_wiphy_register;
1161
+		goto fail_workqueue;
10921162 
10931163 	if (!local->ops->remain_on_channel)
10941164 		local->hw.wiphy->max_remain_on_channel_duration = 5000;
....@@ -1101,11 +1171,18 @@
11011171 	if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
11021172 		local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
11031173 
1104
-	local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1174
+	/* mac80211 supports multi BSSID, if the driver supports it */
1175
+	if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1176
+		local->hw.wiphy->support_mbssid = true;
1177
+		if (ieee80211_hw_check(&local->hw,
1178
+				       SUPPORTS_ONLY_HE_MULTI_BSSID))
1179
+			local->hw.wiphy->support_only_he_mbssid = true;
1180
+		else
1181
+			local->ext_capa[2] |=
1182
+				WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1183
+	}
11051184 
1106
-	result = wiphy_register(local->hw.wiphy);
1107
-	if (result < 0)
1108
-		goto fail_wiphy_register;
1185
+	local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
11091186 
11101187 	/*
11111188 	 * We use the number of queues for feature tests (QoS, HT) internally
....@@ -1129,8 +1206,6 @@
11291206 	local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
11301207 				   IEEE80211_TX_STATUS_HEADROOM);
11311208 
1132
-	debugfs_hw_add(local);
1133
-
11341209 	/*
11351210 	 * if the driver doesn't specify a max listen interval we
11361211 	 * use 5 which should be a safe default
....@@ -1145,10 +1220,10 @@
11451220 	if (!local->hw.max_nan_de_entries)
11461221 		local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
11471222 
1148
-	result = ieee80211_wep_init(local);
1149
-	if (result < 0)
1150
-		wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1151
-			    result);
1223
+	if (!local->hw.weight_multiplier)
1224
+		local->hw.weight_multiplier = 1;
1225
+
1226
+	ieee80211_wep_init(local);
11521227 
11531228 	local->hw.conf.flags = IEEE80211_CONF_IDLE;
11541229 
....@@ -1159,20 +1234,78 @@
11591234 		goto fail_flows;
11601235 
11611236 	rtnl_lock();
1162
-
11631237 	result = ieee80211_init_rate_ctrl_alg(local,
11641238 					      hw->rate_control_algorithm);
1239
+	rtnl_unlock();
11651240 	if (result < 0) {
11661241 		wiphy_debug(local->hw.wiphy,
11671242 			    "Failed to initialize rate control algorithm\n");
11681243 		goto fail_rate;
11691244 	}
11701245 
1246
+	if (local->rate_ctrl) {
1247
+		clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1248
+		if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1249
+			ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1250
+	}
1251
+
1252
+	/*
1253
+	 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1254
+	 * or have it when we don't, copy the sband structure and set/clear it.
1255
+	 * This is necessary because rate scaling algorithms could be switched
1256
+	 * and have different support values.
1257
+	 * Print a message so that in the common case the reallocation can be
1258
+	 * avoided.
1259
+	 */
1260
+	BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1261
+	for (band = 0; band < NUM_NL80211_BANDS; band++) {
1262
+		struct ieee80211_supported_band *sband;
1263
+		bool local_cap, ie_cap;
1264
+
1265
+		local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1266
+
1267
+		sband = local->hw.wiphy->bands[band];
1268
+		if (!sband || !sband->vht_cap.vht_supported)
1269
+			continue;
1270
+
1271
+		ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1272
+			    cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1273
+
1274
+		if (local_cap == ie_cap)
1275
+			continue;
1276
+
1277
+		sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1278
+		if (!sband) {
1279
+			result = -ENOMEM;
1280
+			goto fail_rate;
1281
+		}
1282
+
1283
+		wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1284
+			  band);
1285
+
1286
+		sband->vht_cap.vht_mcs.tx_highest ^=
1287
+			cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1288
+
1289
+		local->hw.wiphy->bands[band] = sband;
1290
+		local->sband_allocated |= BIT(band);
1291
+	}
1292
+
1293
+	result = wiphy_register(local->hw.wiphy);
1294
+	if (result < 0)
1295
+		goto fail_wiphy_register;
1296
+
1297
+	debugfs_hw_add(local);
1298
+	rate_control_add_debugfs(local);
1299
+
1300
+	rtnl_lock();
1301
+
11711302 	/* add one default STA interface if supported */
11721303 	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
11731304 	    !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1305
+		struct vif_params params = {0};
1306
+
11741307 		result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1175
-					  NL80211_IFTYPE_STATION, NULL);
1308
+					  NL80211_IFTYPE_STATION, &params);
11761309 		if (result)
11771310 			wiphy_warn(local->hw.wiphy,
11781311 				   "Failed to add default virtual iface\n");
....@@ -1205,20 +1338,21 @@
12051338 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
12061339  fail_ifa:
12071340 #endif
1341
+	wiphy_unregister(local->hw.wiphy);
1342
+ fail_wiphy_register:
12081343 	rtnl_lock();
12091344 	rate_control_deinitialize(local);
12101345 	ieee80211_remove_interfaces(local);
1211
- fail_rate:
12121346 	rtnl_unlock();
1213
-	ieee80211_led_exit(local);
1214
-	ieee80211_wep_free(local);
1347
+ fail_rate:
12151348  fail_flows:
1349
+	ieee80211_led_exit(local);
12161350 	destroy_workqueue(local->workqueue);
12171351  fail_workqueue:
1218
-	wiphy_unregister(local->hw.wiphy);
1219
- fail_wiphy_register:
1220
-	if (local->wiphy_ciphers_allocated)
1352
+	if (local->wiphy_ciphers_allocated) {
12211353 		kfree(local->hw.wiphy->cipher_suites);
1354
+		local->wiphy_ciphers_allocated = false;
1355
+	}
12221356 	kfree(local->int_scan_req);
12231357 	return result;
12241358 }
....@@ -1266,9 +1400,8 @@
12661400 	skb_queue_purge(&local->skb_queue_unreliable);
12671401 	skb_queue_purge(&local->skb_queue_tdls_chsw);
12681402 
1269
-	destroy_workqueue(local->workqueue);
12701403 	wiphy_unregister(local->hw.wiphy);
1271
-	ieee80211_wep_free(local);
1404
+	destroy_workqueue(local->workqueue);
12721405 	ieee80211_led_exit(local);
12731406 	kfree(local->int_scan_req);
12741407 }
....@@ -1284,12 +1417,15 @@
12841417 void ieee80211_free_hw(struct ieee80211_hw *hw)
12851418 {
12861419 	struct ieee80211_local *local = hw_to_local(hw);
1420
+	enum nl80211_band band;
12871421 
12881422 	mutex_destroy(&local->iflist_mtx);
12891423 	mutex_destroy(&local->mtx);
12901424 
1291
-	if (local->wiphy_ciphers_allocated)
1425
+	if (local->wiphy_ciphers_allocated) {
12921426 		kfree(local->hw.wiphy->cipher_suites);
1427
+		local->wiphy_ciphers_allocated = false;
1428
+	}
12931429 
12941430 	idr_for_each(&local->ack_status_frames,
12951431 		     ieee80211_free_ack_frame, NULL);
....@@ -1298,6 +1434,12 @@
12981434 	sta_info_stop(local);
12991435 
13001436 	ieee80211_free_led_names(local);
1437
+
1438
+	for (band = 0; band < NUM_NL80211_BANDS; band++) {
1439
+		if (!(local->sband_allocated & BIT(band)))
1440
+			continue;
1441
+		kfree(local->hw.wiphy->bands[band]);
1442
+	}
13011443 
13021444 	wiphy_free(local->hw.wiphy);
13031445 }
....@@ -1316,18 +1458,12 @@
13161458 	if (ret)
13171459 		return ret;
13181460 
1319
-	ret = rc80211_minstrel_ht_init();
1320
-	if (ret)
1321
-		goto err_minstrel;
1322
-
13231461 	ret = ieee80211_iface_init();
13241462 	if (ret)
13251463 		goto err_netdev;
13261464 
13271465 	return 0;
13281466  err_netdev:
1329
-	rc80211_minstrel_ht_exit();
1330
- err_minstrel:
13311467 	rc80211_minstrel_exit();
13321468 
13331469 	return ret;
....@@ -1335,7 +1471,6 @@
13351471 
13361472 static void __exit ieee80211_exit(void)
13371473 {
1338
-	rc80211_minstrel_ht_exit();
13391474 	rc80211_minstrel_exit();
13401475 
13411476 	ieee80211s_stop();