ipv4: flush route cache after change accept_local
[linux-2.6.git] / net / mac80211 / main.c
index a06b6ee..3d90dad 100644 (file)
 #include "cfg.h"
 #include "debugfs.h"
 
-
-bool ieee80211_disable_40mhz_24ghz;
-module_param(ieee80211_disable_40mhz_24ghz, bool, 0644);
-MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz,
-                "Disable 40MHz support in the 2.4GHz band");
+static struct lock_class_key ieee80211_rx_skb_queue_class;
 
 void ieee80211_configure_filter(struct ieee80211_local *local)
 {
@@ -54,6 +50,9 @@ void ieee80211_configure_filter(struct ieee80211_local *local)
        if (local->monitors || local->scanning)
                new_flags |= FIF_BCN_PRBRESP_PROMISC;
 
+       if (local->fif_probe_req || local->probe_req_reg)
+               new_flags |= FIF_PROBE_REQ;
+
        if (local->fif_fcsfail)
                new_flags |= FIF_FCSFAIL;
 
@@ -93,6 +92,47 @@ static void ieee80211_reconfig_filter(struct work_struct *work)
        ieee80211_configure_filter(local);
 }
 
+/*
+ * Returns true if we are logically configured to be on
+ * the operating channel AND the hardware-conf is currently
+ * configured on the operating channel.  Compares channel-type
+ * as well.
+ */
+bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local)
+{
+       struct ieee80211_channel *chan, *scan_chan;
+       enum nl80211_channel_type channel_type;
+
+       /* This logic needs to match logic in ieee80211_hw_config */
+       if (local->scan_channel) {
+               chan = local->scan_channel;
+               /* If scanning on oper channel, use whatever channel-type
+                * is currently in use.
+                */
+               if (chan == local->oper_channel)
+                       channel_type = local->_oper_channel_type;
+               else
+                       channel_type = NL80211_CHAN_NO_HT;
+       } else if (local->tmp_channel) {
+               chan = scan_chan = local->tmp_channel;
+               channel_type = local->tmp_channel_type;
+       } else {
+               chan = local->oper_channel;
+               channel_type = local->_oper_channel_type;
+       }
+
+       if (chan != local->oper_channel ||
+           channel_type != local->_oper_channel_type)
+               return false;
+
+       /* Check current hardware-config against oper_channel. */
+       if ((local->oper_channel != local->hw.conf.channel) ||
+           (local->_oper_channel_type != local->hw.conf.channel_type))
+               return false;
+
+       return true;
+}
+
 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 {
        struct ieee80211_channel *chan, *scan_chan;
@@ -105,20 +145,33 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 
        scan_chan = local->scan_channel;
 
+       /* If this off-channel logic ever changes,  ieee80211_on_oper_channel
+        * may need to change as well.
+        */
        offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
        if (scan_chan) {
                chan = scan_chan;
-               channel_type = NL80211_CHAN_NO_HT;
-               local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
+               /* If scanning on oper channel, use whatever channel-type
+                * is currently in use.
+                */
+               if (chan == local->oper_channel)
+                       channel_type = local->_oper_channel_type;
+               else
+                       channel_type = NL80211_CHAN_NO_HT;
        } else if (local->tmp_channel) {
                chan = scan_chan = local->tmp_channel;
                channel_type = local->tmp_channel_type;
-               local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
        } else {
                chan = local->oper_channel;
                channel_type = local->_oper_channel_type;
-               local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
        }
+
+       if (chan != local->oper_channel ||
+           channel_type != local->_oper_channel_type)
+               local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
+       else
+               local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
+
        offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 
        if (offchannel_flag || chan != local->hw.conf.channel ||
@@ -140,7 +193,8 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
                changed |= IEEE80211_CONF_CHANGE_SMPS;
        }
 
-       if (scan_chan)
+       if ((local->scanning & SCAN_SW_SCANNING) ||
+           (local->scanning & SCAN_HW_SCANNING))
                power = chan->max_power;
        else
                power = local->power_constr_level ?
@@ -200,6 +254,8 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
                sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
        else if (sdata->vif.type == NL80211_IFTYPE_AP)
                sdata->vif.bss_conf.bssid = sdata->vif.addr;
+       else if (sdata->vif.type == NL80211_IFTYPE_WDS)
+               sdata->vif.bss_conf.bssid = NULL;
        else if (ieee80211_vif_is_mesh(&sdata->vif)) {
                sdata->vif.bss_conf.bssid = zero;
        } else {
@@ -210,6 +266,7 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
        switch (sdata->vif.type) {
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_ADHOC:
+       case NL80211_IFTYPE_WDS:
        case NL80211_IFTYPE_MESH_POINT:
                break;
        default:
@@ -222,7 +279,7 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 
        if (changed & BSS_CHANGED_BEACON_ENABLED) {
                if (local->quiescing || !ieee80211_sdata_running(sdata) ||
-                   test_bit(SCAN_SW_SCANNING, &local->scanning)) {
+                   test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) {
                        sdata->vif.bss_conf.enable_beacon = false;
                } else {
                        /*
@@ -238,9 +295,12 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
                                sdata->vif.bss_conf.enable_beacon =
                                        !!sdata->u.ibss.presp;
                                break;
+#ifdef CONFIG_MAC80211_MESH
                        case NL80211_IFTYPE_MESH_POINT:
-                               sdata->vif.bss_conf.enable_beacon = true;
+                               sdata->vif.bss_conf.enable_beacon =
+                                       !!sdata->u.mesh.mesh_id_len;
                                break;
+#endif
                        default:
                                /* not reached */
                                WARN_ON(1);
@@ -294,7 +354,17 @@ static void ieee80211_restart_work(struct work_struct *work)
        struct ieee80211_local *local =
                container_of(work, struct ieee80211_local, restart_work);
 
+       /* wait for scan work complete */
+       flush_workqueue(local->workqueue);
+
+       mutex_lock(&local->mtx);
+       WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
+            local->sched_scanning,
+               "%s called with hardware scan in progress\n", __func__);
+       mutex_unlock(&local->mtx);
+
        rtnl_lock();
+       ieee80211_scan_cancel(local);
        ieee80211_reconfig(local);
        rtnl_unlock();
 }
@@ -305,11 +375,8 @@ void ieee80211_restart_hw(struct ieee80211_hw *hw)
 
        trace_api_restart_hw(local);
 
-       WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
-               "%s called with hardware scan in progress\n", __func__);
-
-       if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)))
-               ieee80211_scan_cancel(local);
+       wiphy_info(hw->wiphy,
+                  "Hardware restart was requested\n");
 
        /* use this reason, ieee80211_reconfig will unblock it */
        ieee80211_stop_queues_by_reason(hw,
@@ -325,7 +392,7 @@ static void ieee80211_recalc_smps_work(struct work_struct *work)
                container_of(work, struct ieee80211_local, recalc_smps);
 
        mutex_lock(&local->iflist_mtx);
-       ieee80211_recalc_smps(local, NULL);
+       ieee80211_recalc_smps(local);
        mutex_unlock(&local->iflist_mtx);
 }
 
@@ -362,7 +429,7 @@ static int ieee80211_ifa_changed(struct notifier_block *nb,
        if (sdata->vif.type != NL80211_IFTYPE_STATION)
                return NOTIFY_DONE;
 
-       idev = sdata->dev->ip_ptr;
+       idev = __in_dev_get_rtnl(sdata->dev);
        if (!idev)
                return NOTIFY_DONE;
 
@@ -456,6 +523,27 @@ ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
                        BIT(IEEE80211_STYPE_DEAUTH >> 4) |
                        BIT(IEEE80211_STYPE_ACTION >> 4),
        },
+       [NL80211_IFTYPE_P2P_CLIENT] = {
+               .tx = 0xffff,
+               .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+                       BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
+       },
+       [NL80211_IFTYPE_P2P_GO] = {
+               .tx = 0xffff,
+               .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
+                       BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
+                       BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
+                       BIT(IEEE80211_STYPE_DISASSOC >> 4) |
+                       BIT(IEEE80211_STYPE_AUTH >> 4) |
+                       BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+                       BIT(IEEE80211_STYPE_ACTION >> 4),
+       },
+       [NL80211_IFTYPE_MESH_POINT] = {
+               .tx = 0xffff,
+               .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+                       BIT(IEEE80211_STYPE_AUTH >> 4) |
+                       BIT(IEEE80211_STYPE_DEAUTH >> 4),
+       },
 };
 
 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
@@ -489,10 +577,14 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 
        wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 
+       wiphy->privid = mac80211_wiphy_privid;
+
        wiphy->flags |= WIPHY_FLAG_NETNS_OK |
                        WIPHY_FLAG_4ADDR_AP |
                        WIPHY_FLAG_4ADDR_STATION;
-       wiphy->privid = mac80211_wiphy_privid;
+
+       if (!ops->set_key)
+               wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 
        wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 
@@ -514,6 +606,8 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
        /* set up some defaults */
        local->hw.queues = 1;
        local->hw.max_rates = 1;
+       local->hw.max_report_rates = 0;
+       local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
        local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
        local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
        local->user_power_level = -1;
@@ -531,6 +625,16 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
        spin_lock_init(&local->filter_lock);
        spin_lock_init(&local->queue_stop_reason_lock);
 
+       /*
+        * The rx_skb_queue is only accessed from tasklets,
+        * but other SKB queues are used from within IRQ
+        * context. Therefore, this one needs a different
+        * locking class so our direct, non-irq-safe use of
+        * the queue's lock doesn't throw lockdep warnings.
+        */
+       skb_queue_head_init_class(&local->rx_skb_queue,
+                                 &ieee80211_rx_skb_queue_class);
+
        INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 
        ieee80211_work_init(local);
@@ -548,6 +652,9 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
        setup_timer(&local->dynamic_ps_timer,
                    ieee80211_dynamic_ps_timer, (unsigned long) local);
 
+       INIT_WORK(&local->sched_scan_stopped_work,
+                 ieee80211_sched_scan_stopped_work);
+
        sta_info_init(local);
 
        for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
@@ -567,6 +674,10 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
        /* init dummy netdev for use w/ NAPI */
        init_dummy_netdev(&local->napi_dev);
 
+       ieee80211_led_names(local);
+
+       ieee80211_hw_roc_setup(local);
+
        return local_to_hw(local);
 }
 EXPORT_SYMBOL(ieee80211_alloc_hw);
@@ -574,7 +685,7 @@ EXPORT_SYMBOL(ieee80211_alloc_hw);
 int ieee80211_register_hw(struct ieee80211_hw *hw)
 {
        struct ieee80211_local *local = hw_to_local(hw);
-       int result;
+       int result, i;
        enum ieee80211_band band;
        int channels, max_bitrates;
        bool supp_ht;
@@ -589,6 +700,16 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
                WLAN_CIPHER_SUITE_AES_CMAC
        };
 
+       if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns)
+#ifdef CONFIG_PM
+           && (!local->ops->suspend || !local->ops->resume)
+#endif
+           )
+               return -EINVAL;
+
+       if (hw->max_report_rates == 0)
+               hw->max_report_rates = hw->max_rates;
+
        /*
         * generic code guarantees at least one band,
         * set this very early because much code assumes
@@ -621,18 +742,51 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
        if (!local->int_scan_req)
                return -ENOMEM;
 
+       for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+               if (!local->hw.wiphy->bands[band])
+                       continue;
+               local->int_scan_req->rates[band] = (u32) -1;
+       }
+
        /* if low-level driver supports AP, we also support VLAN */
-       if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
-               local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
+       if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
+               hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
+               hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
+       }
 
        /* mac80211 always supports monitor */
-       local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
+       hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
+       hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
+
+       /*
+        * mac80211 doesn't support more than 1 channel, and also not more
+        * than one IBSS interface
+        */
+       for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
+               const struct ieee80211_iface_combination *c;
+               int j;
+
+               c = &hw->wiphy->iface_combinations[i];
+
+               if (c->num_different_channels > 1)
+                       return -EINVAL;
+
+               for (j = 0; j < c->n_limits; j++)
+                       if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
+                           c->limits[j].max > 1)
+                               return -EINVAL;
+       }
 
 #ifndef CONFIG_MAC80211_MESH
        /* mesh depends on Kconfig, but drivers should set it if they want */
        local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 #endif
 
+       /* if the underlying driver supports mesh, mac80211 will (at least)
+        * provide routing of mesh authentication frames to userspace */
+       if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
+               local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
+
        /* mac80211 supports control port protocol changing */
        local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 
@@ -648,10 +802,11 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
        /*
         * Calculate scan IE length -- we need this to alloc
         * memory and to subtract from the driver limit. It
-        * includes the (extended) supported rates and HT
+        * includes the DS Params, (extended) supported rates, and HT
         * information -- SSID is the driver's responsibility.
         */
-       local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
+       local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
+               3 /* DS Params */;
        if (supp_ht)
                local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
 
@@ -707,6 +862,12 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
                }
        }
 
+       if (!local->ops->remain_on_channel)
+               local->hw.wiphy->max_remain_on_channel_duration = 5000;
+
+       if (local->ops->sched_scan_start)
+               local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
+
        result = wiphy_register(local->hw.wiphy);
        if (result < 0)
                goto fail_wiphy_register;
@@ -719,7 +880,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
                hw->queues = IEEE80211_MAX_QUEUES;
 
        local->workqueue =
-               create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
+               alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
        if (!local->workqueue) {
                result = -ENOMEM;
                goto fail_workqueue;
@@ -730,8 +891,10 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
         * and we need some headroom for passing the frame to monitor
         * interfaces, but never both at the same time.
         */
+#ifndef __CHECKER__
        BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
                        sizeof(struct ieee80211_tx_status_rtap_hdr));
+#endif
        local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
                                   sizeof(struct ieee80211_tx_status_rtap_hdr));
 
@@ -748,10 +911,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 
        local->dynamic_ps_forced_timeout = -1;
 
-       result = sta_info_start(local);
-       if (result < 0)
-               goto fail_sta_info;
-
        result = ieee80211_wep_init(local);
        if (result < 0)
                wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
@@ -814,7 +973,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
        rtnl_unlock();
        ieee80211_wep_free(local);
        sta_info_stop(local);
- fail_sta_info:
        destroy_workqueue(local->workqueue);
  fail_workqueue:
        wiphy_unregister(local->hw.wiphy);
@@ -850,11 +1008,16 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw)
 
        rtnl_unlock();
 
+       /*
+        * Now all work items will be gone, but the
+        * timer might still be armed, so delete it
+        */
+       del_timer_sync(&local->work_timer);
+
        cancel_work_sync(&local->restart_work);
        cancel_work_sync(&local->reconfig_filter);
 
        ieee80211_clear_tx_pending(local);
-       sta_info_stop(local);
        rate_control_deinitialize(local);
 
        if (skb_queue_len(&local->skb_queue) ||
@@ -862,9 +1025,11 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw)
                wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
        skb_queue_purge(&local->skb_queue);
        skb_queue_purge(&local->skb_queue_unreliable);
+       skb_queue_purge(&local->rx_skb_queue);
 
        destroy_workqueue(local->workqueue);
        wiphy_unregister(local->hw.wiphy);
+       sta_info_stop(local);
        ieee80211_wep_free(local);
        ieee80211_led_exit(local);
        kfree(local->int_scan_req);
@@ -927,16 +1092,12 @@ static void __exit ieee80211_exit(void)
        rc80211_minstrel_ht_exit();
        rc80211_minstrel_exit();
 
-       /*
-        * For key todo, it'll be empty by now but the work
-        * might still be scheduled.
-        */
-       flush_scheduled_work();
-
        if (mesh_allocated)
                ieee80211s_stop();
 
        ieee80211_iface_exit();
+
+       rcu_barrier();
 }