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-rw-r--r--net/mac80211/main.c1102
1 files changed, 1102 insertions, 0 deletions
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
new file mode 100644
index 00000000..1e36fb33
--- /dev/null
+++ b/net/mac80211/main.c
@@ -0,0 +1,1102 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <net/mac80211.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include <linux/rtnetlink.h>
+#include <linux/bitmap.h>
+#include <linux/pm_qos_params.h>
+#include <linux/inetdevice.h>
+#include <net/net_namespace.h>
+#include <net/cfg80211.h>
+
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "rate.h"
+#include "mesh.h"
+#include "wep.h"
+#include "led.h"
+#include "cfg.h"
+#include "debugfs.h"
+
+static struct lock_class_key ieee80211_rx_skb_queue_class;
+
+void ieee80211_configure_filter(struct ieee80211_local *local)
+{
+ u64 mc;
+ unsigned int changed_flags;
+ unsigned int new_flags = 0;
+
+ if (atomic_read(&local->iff_promiscs))
+ new_flags |= FIF_PROMISC_IN_BSS;
+
+ if (atomic_read(&local->iff_allmultis))
+ new_flags |= FIF_ALLMULTI;
+
+ 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;
+
+ if (local->fif_plcpfail)
+ new_flags |= FIF_PLCPFAIL;
+
+ if (local->fif_control)
+ new_flags |= FIF_CONTROL;
+
+ if (local->fif_other_bss)
+ new_flags |= FIF_OTHER_BSS;
+
+ if (local->fif_pspoll)
+ new_flags |= FIF_PSPOLL;
+
+ spin_lock_bh(&local->filter_lock);
+ changed_flags = local->filter_flags ^ new_flags;
+
+ mc = drv_prepare_multicast(local, &local->mc_list);
+ spin_unlock_bh(&local->filter_lock);
+
+ /* be a bit nasty */
+ new_flags |= (1<<31);
+
+ drv_configure_filter(local, changed_flags, &new_flags, mc);
+
+ WARN_ON(new_flags & (1<<31));
+
+ local->filter_flags = new_flags & ~(1<<31);
+}
+
+static void ieee80211_reconfig_filter(struct work_struct *work)
+{
+ struct ieee80211_local *local =
+ container_of(work, struct ieee80211_local, reconfig_filter);
+
+ 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;
+ int ret = 0;
+ int power;
+ enum nl80211_channel_type channel_type;
+ u32 offchannel_flag;
+
+ might_sleep();
+
+ 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;
+ /* 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)
+ 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 ||
+ channel_type != local->hw.conf.channel_type) {
+ local->hw.conf.channel = chan;
+ local->hw.conf.channel_type = channel_type;
+ changed |= IEEE80211_CONF_CHANGE_CHANNEL;
+ }
+
+ if (!conf_is_ht(&local->hw.conf)) {
+ /*
+ * mac80211.h documents that this is only valid
+ * when the channel is set to an HT type, and
+ * that otherwise STATIC is used.
+ */
+ local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
+ } else if (local->hw.conf.smps_mode != local->smps_mode) {
+ local->hw.conf.smps_mode = local->smps_mode;
+ changed |= IEEE80211_CONF_CHANGE_SMPS;
+ }
+
+ if ((local->scanning & SCAN_SW_SCANNING) ||
+ (local->scanning & SCAN_HW_SCANNING))
+ power = chan->max_power;
+ else
+ power = local->power_constr_level ?
+ (chan->max_power - local->power_constr_level) :
+ chan->max_power;
+
+ if (local->user_power_level >= 0)
+ power = min(power, local->user_power_level);
+
+ if (local->hw.conf.power_level != power) {
+ changed |= IEEE80211_CONF_CHANGE_POWER;
+ local->hw.conf.power_level = power;
+ }
+
+ if (changed && local->open_count) {
+ ret = drv_config(local, changed);
+ /*
+ * Goal:
+ * HW reconfiguration should never fail, the driver has told
+ * us what it can support so it should live up to that promise.
+ *
+ * Current status:
+ * rfkill is not integrated with mac80211 and a
+ * configuration command can thus fail if hardware rfkill
+ * is enabled
+ *
+ * FIXME: integrate rfkill with mac80211 and then add this
+ * WARN_ON() back
+ *
+ */
+ /* WARN_ON(ret); */
+ }
+
+ return ret;
+}
+
+void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
+ u32 changed)
+{
+ struct ieee80211_local *local = sdata->local;
+ static const u8 zero[ETH_ALEN] = { 0 };
+
+ if (!changed)
+ return;
+
+ if (sdata->vif.type == NL80211_IFTYPE_STATION) {
+ /*
+ * While not associated, claim a BSSID of all-zeroes
+ * so that drivers don't do any weird things with the
+ * BSSID at that time.
+ */
+ if (sdata->vif.bss_conf.assoc)
+ sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
+ else
+ sdata->vif.bss_conf.bssid = zero;
+ } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
+ 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 {
+ WARN_ON(1);
+ return;
+ }
+
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_WDS:
+ case NL80211_IFTYPE_MESH_POINT:
+ break;
+ default:
+ /* do not warn to simplify caller in scan.c */
+ changed &= ~BSS_CHANGED_BEACON_ENABLED;
+ if (WARN_ON(changed & BSS_CHANGED_BEACON))
+ return;
+ break;
+ }
+
+ if (changed & BSS_CHANGED_BEACON_ENABLED) {
+ if (local->quiescing || !ieee80211_sdata_running(sdata) ||
+ test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) {
+ sdata->vif.bss_conf.enable_beacon = false;
+ } else {
+ /*
+ * Beacon should be enabled, but AP mode must
+ * check whether there is a beacon configured.
+ */
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_AP:
+ sdata->vif.bss_conf.enable_beacon =
+ !!sdata->u.ap.beacon;
+ break;
+ case NL80211_IFTYPE_ADHOC:
+ 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 =
+ !!sdata->u.mesh.mesh_id_len;
+ break;
+#endif
+ default:
+ /* not reached */
+ WARN_ON(1);
+ break;
+ }
+ }
+ }
+
+ drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
+}
+
+u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
+{
+ sdata->vif.bss_conf.use_cts_prot = false;
+ sdata->vif.bss_conf.use_short_preamble = false;
+ sdata->vif.bss_conf.use_short_slot = false;
+ return BSS_CHANGED_ERP_CTS_PROT |
+ BSS_CHANGED_ERP_PREAMBLE |
+ BSS_CHANGED_ERP_SLOT;
+}
+
+static void ieee80211_tasklet_handler(unsigned long data)
+{
+ struct ieee80211_local *local = (struct ieee80211_local *) data;
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(&local->skb_queue)) ||
+ (skb = skb_dequeue(&local->skb_queue_unreliable))) {
+ switch (skb->pkt_type) {
+ case IEEE80211_RX_MSG:
+ /* Clear skb->pkt_type in order to not confuse kernel
+ * netstack. */
+ skb->pkt_type = 0;
+ ieee80211_rx(local_to_hw(local), skb);
+ break;
+ case IEEE80211_TX_STATUS_MSG:
+ skb->pkt_type = 0;
+ ieee80211_tx_status(local_to_hw(local), skb);
+ break;
+ default:
+ WARN(1, "mac80211: Packet is of unknown type %d\n",
+ skb->pkt_type);
+ dev_kfree_skb(skb);
+ break;
+ }
+ }
+}
+
+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();
+}
+
+void ieee80211_restart_hw(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ trace_api_restart_hw(local);
+
+ wiphy_info(hw->wiphy,
+ "Hardware restart was requested\n");
+
+ /* use this reason, ieee80211_reconfig will unblock it */
+ ieee80211_stop_queues_by_reason(hw,
+ IEEE80211_QUEUE_STOP_REASON_SUSPEND);
+
+ schedule_work(&local->restart_work);
+}
+EXPORT_SYMBOL(ieee80211_restart_hw);
+
+static void ieee80211_recalc_smps_work(struct work_struct *work)
+{
+ struct ieee80211_local *local =
+ container_of(work, struct ieee80211_local, recalc_smps);
+
+ mutex_lock(&local->iflist_mtx);
+ ieee80211_recalc_smps(local);
+ mutex_unlock(&local->iflist_mtx);
+}
+
+#ifdef CONFIG_INET
+static int ieee80211_ifa_changed(struct notifier_block *nb,
+ unsigned long data, void *arg)
+{
+ struct in_ifaddr *ifa = arg;
+ struct ieee80211_local *local =
+ container_of(nb, struct ieee80211_local,
+ ifa_notifier);
+ struct net_device *ndev = ifa->ifa_dev->dev;
+ struct wireless_dev *wdev = ndev->ieee80211_ptr;
+ struct in_device *idev;
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_bss_conf *bss_conf;
+ struct ieee80211_if_managed *ifmgd;
+ int c = 0;
+
+ /* Make sure it's our interface that got changed */
+ if (!wdev)
+ return NOTIFY_DONE;
+
+ if (wdev->wiphy != local->hw.wiphy)
+ return NOTIFY_DONE;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
+ bss_conf = &sdata->vif.bss_conf;
+
+ if (!ieee80211_sdata_running(sdata))
+ return NOTIFY_DONE;
+
+ /* ARP filtering is only supported in managed mode */
+ if (sdata->vif.type != NL80211_IFTYPE_STATION)
+ return NOTIFY_DONE;
+
+ idev = __in_dev_get_rtnl(sdata->dev);
+ if (!idev)
+ return NOTIFY_DONE;
+
+ ifmgd = &sdata->u.mgd;
+ mutex_lock(&ifmgd->mtx);
+
+ /* Copy the addresses to the bss_conf list */
+ ifa = idev->ifa_list;
+ while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
+ bss_conf->arp_addr_list[c] = ifa->ifa_address;
+ ifa = ifa->ifa_next;
+ c++;
+ }
+
+ /* If not all addresses fit the list, disable filtering */
+ if (ifa) {
+ sdata->arp_filter_state = false;
+ c = 0;
+ } else {
+ sdata->arp_filter_state = true;
+ }
+ bss_conf->arp_addr_cnt = c;
+
+ /* Configure driver only if associated */
+ if (ifmgd->associated) {
+ bss_conf->arp_filter_enabled = sdata->arp_filter_state;
+ ieee80211_bss_info_change_notify(sdata,
+ BSS_CHANGED_ARP_FILTER);
+ }
+
+ mutex_unlock(&ifmgd->mtx);
+
+ return NOTIFY_DONE;
+}
+#endif
+
+static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
+{
+ struct ieee80211_local *local =
+ container_of(napi, struct ieee80211_local, napi);
+
+ return local->ops->napi_poll(&local->hw, budget);
+}
+
+void ieee80211_napi_schedule(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ napi_schedule(&local->napi);
+}
+EXPORT_SYMBOL(ieee80211_napi_schedule);
+
+void ieee80211_napi_complete(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ napi_complete(&local->napi);
+}
+EXPORT_SYMBOL(ieee80211_napi_complete);
+
+/* There isn't a lot of sense in it, but you can transmit anything you like */
+static const struct ieee80211_txrx_stypes
+ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
+ [NL80211_IFTYPE_ADHOC] = {
+ .tx = 0xffff,
+ .rx = BIT(IEEE80211_STYPE_ACTION >> 4),
+ },
+ [NL80211_IFTYPE_STATION] = {
+ .tx = 0xffff,
+ .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+ BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
+ },
+ [NL80211_IFTYPE_AP] = {
+ .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_AP_VLAN] = {
+ /* copy AP */
+ .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_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,
+ const struct ieee80211_ops *ops)
+{
+ struct ieee80211_local *local;
+ int priv_size, i;
+ struct wiphy *wiphy;
+
+ /* Ensure 32-byte alignment of our private data and hw private data.
+ * We use the wiphy priv data for both our ieee80211_local and for
+ * the driver's private data
+ *
+ * In memory it'll be like this:
+ *
+ * +-------------------------+
+ * | struct wiphy |
+ * +-------------------------+
+ * | struct ieee80211_local |
+ * +-------------------------+
+ * | driver's private data |
+ * +-------------------------+
+ *
+ */
+ priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
+
+ wiphy = wiphy_new(&mac80211_config_ops, priv_size);
+
+ if (!wiphy)
+ return NULL;
+
+ 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;
+
+ if (!ops->set_key)
+ wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
+
+ wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
+
+ local = wiphy_priv(wiphy);
+
+ local->hw.wiphy = wiphy;
+
+ local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
+
+ BUG_ON(!ops->tx);
+ BUG_ON(!ops->start);
+ BUG_ON(!ops->stop);
+ BUG_ON(!ops->config);
+ BUG_ON(!ops->add_interface);
+ BUG_ON(!ops->remove_interface);
+ BUG_ON(!ops->configure_filter);
+ local->ops = ops;
+
+ /* 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;
+ local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
+ local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
+
+ INIT_LIST_HEAD(&local->interfaces);
+
+ __hw_addr_init(&local->mc_list);
+
+ mutex_init(&local->iflist_mtx);
+ mutex_init(&local->mtx);
+
+ mutex_init(&local->key_mtx);
+ 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);
+
+ INIT_WORK(&local->restart_work, ieee80211_restart_work);
+
+ INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
+ INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
+ local->smps_mode = IEEE80211_SMPS_OFF;
+
+ INIT_WORK(&local->dynamic_ps_enable_work,
+ ieee80211_dynamic_ps_enable_work);
+ INIT_WORK(&local->dynamic_ps_disable_work,
+ ieee80211_dynamic_ps_disable_work);
+ 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++) {
+ skb_queue_head_init(&local->pending[i]);
+ atomic_set(&local->agg_queue_stop[i], 0);
+ }
+ tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
+ (unsigned long)local);
+
+ tasklet_init(&local->tasklet,
+ ieee80211_tasklet_handler,
+ (unsigned long) local);
+
+ skb_queue_head_init(&local->skb_queue);
+ skb_queue_head_init(&local->skb_queue_unreliable);
+
+ /* 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);
+
+int ieee80211_register_hw(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ int result, i;
+ enum ieee80211_band band;
+ int channels, max_bitrates;
+ bool supp_ht;
+ static const u32 cipher_suites[] = {
+ /* keep WEP first, it may be removed below */
+ WLAN_CIPHER_SUITE_WEP40,
+ WLAN_CIPHER_SUITE_WEP104,
+ WLAN_CIPHER_SUITE_TKIP,
+ WLAN_CIPHER_SUITE_CCMP,
+
+ /* keep last -- depends on hw flags! */
+ 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
+ * that hw.conf.channel is assigned
+ */
+ channels = 0;
+ max_bitrates = 0;
+ supp_ht = false;
+ for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+ struct ieee80211_supported_band *sband;
+
+ sband = local->hw.wiphy->bands[band];
+ if (!sband)
+ continue;
+ if (!local->oper_channel) {
+ /* init channel we're on */
+ local->hw.conf.channel =
+ local->oper_channel = &sband->channels[0];
+ local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
+ }
+ channels += sband->n_channels;
+
+ if (max_bitrates < sband->n_bitrates)
+ max_bitrates = sband->n_bitrates;
+ supp_ht = supp_ht || sband->ht_cap.ht_supported;
+ }
+
+ local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
+ sizeof(void *) * channels, GFP_KERNEL);
+ if (!local->int_scan_req)
+ return -ENOMEM;
+
+ /* if low-level driver supports AP, we also support 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 */
+ 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;
+
+ if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
+ local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
+ else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
+ local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
+
+ WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
+ && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
+ "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
+
+ /*
+ * Calculate scan IE length -- we need this to alloc
+ * memory and to subtract from the driver limit. It
+ * 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 */ +
+ 3 /* DS Params */;
+ if (supp_ht)
+ local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
+
+ if (!local->ops->hw_scan) {
+ /* For hw_scan, driver needs to set these up. */
+ local->hw.wiphy->max_scan_ssids = 4;
+ local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
+ }
+
+ /*
+ * If the driver supports any scan IEs, then assume the
+ * limit includes the IEs mac80211 will add, otherwise
+ * leave it at zero and let the driver sort it out; we
+ * still pass our IEs to the driver but userspace will
+ * not be allowed to in that case.
+ */
+ if (local->hw.wiphy->max_scan_ie_len)
+ local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
+
+ /* Set up cipher suites unless driver already did */
+ if (!local->hw.wiphy->cipher_suites) {
+ local->hw.wiphy->cipher_suites = cipher_suites;
+ local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
+ if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
+ local->hw.wiphy->n_cipher_suites--;
+ }
+ if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
+ if (local->hw.wiphy->cipher_suites == cipher_suites) {
+ local->hw.wiphy->cipher_suites += 2;
+ local->hw.wiphy->n_cipher_suites -= 2;
+ } else {
+ u32 *suites;
+ int r, w = 0;
+
+ /* Filter out WEP */
+
+ suites = kmemdup(
+ local->hw.wiphy->cipher_suites,
+ sizeof(u32) * local->hw.wiphy->n_cipher_suites,
+ GFP_KERNEL);
+ if (!suites)
+ return -ENOMEM;
+ for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
+ u32 suite = local->hw.wiphy->cipher_suites[r];
+ if (suite == WLAN_CIPHER_SUITE_WEP40 ||
+ suite == WLAN_CIPHER_SUITE_WEP104)
+ continue;
+ suites[w++] = suite;
+ }
+ local->hw.wiphy->cipher_suites = suites;
+ local->hw.wiphy->n_cipher_suites = w;
+ local->wiphy_ciphers_allocated = true;
+ }
+ }
+
+ 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;
+
+ /*
+ * We use the number of queues for feature tests (QoS, HT) internally
+ * so restrict them appropriately.
+ */
+ if (hw->queues > IEEE80211_MAX_QUEUES)
+ hw->queues = IEEE80211_MAX_QUEUES;
+
+ local->workqueue =
+ alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
+ if (!local->workqueue) {
+ result = -ENOMEM;
+ goto fail_workqueue;
+ }
+
+ /*
+ * The hardware needs headroom for sending the frame,
+ * 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));
+
+ debugfs_hw_add(local);
+
+ /*
+ * if the driver doesn't specify a max listen interval we
+ * use 5 which should be a safe default
+ */
+ if (local->hw.max_listen_interval == 0)
+ local->hw.max_listen_interval = 5;
+
+ local->hw.conf.listen_interval = local->hw.max_listen_interval;
+
+ local->dynamic_ps_forced_timeout = -1;
+
+ result = ieee80211_wep_init(local);
+ if (result < 0)
+ wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
+ result);
+
+ ieee80211_led_init(local);
+
+ rtnl_lock();
+
+ result = ieee80211_init_rate_ctrl_alg(local,
+ hw->rate_control_algorithm);
+ if (result < 0) {
+ wiphy_debug(local->hw.wiphy,
+ "Failed to initialize rate control algorithm\n");
+ goto fail_rate;
+ }
+
+ /* 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,
+ NL80211_IFTYPE_STATION, NULL);
+ if (result)
+ wiphy_warn(local->hw.wiphy,
+ "Failed to add default virtual iface\n");
+ }
+
+ rtnl_unlock();
+
+ local->network_latency_notifier.notifier_call =
+ ieee80211_max_network_latency;
+ result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
+ &local->network_latency_notifier);
+ if (result) {
+ rtnl_lock();
+ goto fail_pm_qos;
+ }
+
+#ifdef CONFIG_INET
+ local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
+ result = register_inetaddr_notifier(&local->ifa_notifier);
+ if (result)
+ goto fail_ifa;
+#endif
+
+ netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
+ local->hw.napi_weight);
+
+ return 0;
+
+#ifdef CONFIG_INET
+ fail_ifa:
+ pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
+ &local->network_latency_notifier);
+ rtnl_lock();
+#endif
+ fail_pm_qos:
+ ieee80211_led_exit(local);
+ ieee80211_remove_interfaces(local);
+ fail_rate:
+ rtnl_unlock();
+ ieee80211_wep_free(local);
+ sta_info_stop(local);
+ destroy_workqueue(local->workqueue);
+ fail_workqueue:
+ wiphy_unregister(local->hw.wiphy);
+ fail_wiphy_register:
+ if (local->wiphy_ciphers_allocated)
+ kfree(local->hw.wiphy->cipher_suites);
+ kfree(local->int_scan_req);
+ return result;
+}
+EXPORT_SYMBOL(ieee80211_register_hw);
+
+void ieee80211_unregister_hw(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ tasklet_kill(&local->tx_pending_tasklet);
+ tasklet_kill(&local->tasklet);
+
+ pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
+ &local->network_latency_notifier);
+#ifdef CONFIG_INET
+ unregister_inetaddr_notifier(&local->ifa_notifier);
+#endif
+
+ rtnl_lock();
+
+ /*
+ * At this point, interface list manipulations are fine
+ * because the driver cannot be handing us frames any
+ * more and the tasklet is killed.
+ */
+ ieee80211_remove_interfaces(local);
+
+ 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) ||
+ skb_queue_len(&local->skb_queue_unreliable))
+ 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);
+ ieee80211_wep_free(local);
+ ieee80211_led_exit(local);
+ kfree(local->int_scan_req);
+}
+EXPORT_SYMBOL(ieee80211_unregister_hw);
+
+void ieee80211_free_hw(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ mutex_destroy(&local->iflist_mtx);
+ mutex_destroy(&local->mtx);
+
+ if (local->wiphy_ciphers_allocated)
+ kfree(local->hw.wiphy->cipher_suites);
+
+ wiphy_free(local->hw.wiphy);
+}
+EXPORT_SYMBOL(ieee80211_free_hw);
+
+static int __init ieee80211_init(void)
+{
+ struct sk_buff *skb;
+ int ret;
+
+ BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
+ BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
+ IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
+
+ ret = rc80211_minstrel_init();
+ if (ret)
+ return ret;
+
+ ret = rc80211_minstrel_ht_init();
+ if (ret)
+ goto err_minstrel;
+
+ ret = rc80211_pid_init();
+ if (ret)
+ goto err_pid;
+
+ ret = ieee80211_iface_init();
+ if (ret)
+ goto err_netdev;
+
+ return 0;
+ err_netdev:
+ rc80211_pid_exit();
+ err_pid:
+ rc80211_minstrel_ht_exit();
+ err_minstrel:
+ rc80211_minstrel_exit();
+
+ return ret;
+}
+
+static void __exit ieee80211_exit(void)
+{
+ rc80211_pid_exit();
+ rc80211_minstrel_ht_exit();
+ rc80211_minstrel_exit();
+
+ if (mesh_allocated)
+ ieee80211s_stop();
+
+ ieee80211_iface_exit();
+
+ rcu_barrier();
+}
+
+
+subsys_initcall(ieee80211_init);
+module_exit(ieee80211_exit);
+
+MODULE_DESCRIPTION("IEEE 802.11 subsystem");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-13 22:49:23 +0000